1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994-2016 Free Software Foundation, Inc.
5 Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
6 Inc. with support from Florida State University (under contract
7 with the Ada Joint Program Office), and Silicon Graphics, Inc.
8 Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
9 based on Fred Fish's (Cygnus Support) implementation of DWARF 1
12 This file is part of GDB.
14 This program is free software; you can redistribute it and/or modify
15 it under the terms of the GNU General Public License as published by
16 the Free Software Foundation; either version 3 of the License, or
17 (at your option) any later version.
19 This program is distributed in the hope that it will be useful,
20 but WITHOUT ANY WARRANTY; without even the implied warranty of
21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 GNU General Public License for more details.
24 You should have received a copy of the GNU General Public License
25 along with this program. If not, see <http://www.gnu.org/licenses/>. */
27 /* FIXME: Various die-reading functions need to be more careful with
28 reading off the end of the section.
29 E.g., load_partial_dies, read_partial_die. */
40 #include "gdb-demangle.h"
41 #include "expression.h"
42 #include "filenames.h" /* for DOSish file names */
45 #include "complaints.h"
47 #include "dwarf2expr.h"
48 #include "dwarf2loc.h"
49 #include "cp-support.h"
55 #include "typeprint.h"
59 #include "completer.h"
64 #include "gdbcore.h" /* for gnutarget */
65 #include "gdb/gdb-index.h"
70 #include "filestuff.h"
72 #include "namespace.h"
75 #include <sys/types.h>
77 typedef struct symbol
*symbolp
;
80 /* When == 1, print basic high level tracing messages.
81 When > 1, be more verbose.
82 This is in contrast to the low level DIE reading of dwarf_die_debug. */
83 static unsigned int dwarf_read_debug
= 0;
85 /* When non-zero, dump DIEs after they are read in. */
86 static unsigned int dwarf_die_debug
= 0;
88 /* When non-zero, dump line number entries as they are read in. */
89 static unsigned int dwarf_line_debug
= 0;
91 /* When non-zero, cross-check physname against demangler. */
92 static int check_physname
= 0;
94 /* When non-zero, do not reject deprecated .gdb_index sections. */
95 static int use_deprecated_index_sections
= 0;
97 static const struct objfile_data
*dwarf2_objfile_data_key
;
99 /* The "aclass" indices for various kinds of computed DWARF symbols. */
101 static int dwarf2_locexpr_index
;
102 static int dwarf2_loclist_index
;
103 static int dwarf2_locexpr_block_index
;
104 static int dwarf2_loclist_block_index
;
106 /* A descriptor for dwarf sections.
108 S.ASECTION, SIZE are typically initialized when the objfile is first
109 scanned. BUFFER, READIN are filled in later when the section is read.
110 If the section contained compressed data then SIZE is updated to record
111 the uncompressed size of the section.
113 DWP file format V2 introduces a wrinkle that is easiest to handle by
114 creating the concept of virtual sections contained within a real section.
115 In DWP V2 the sections of the input DWO files are concatenated together
116 into one section, but section offsets are kept relative to the original
118 If this is a virtual dwp-v2 section, S.CONTAINING_SECTION is a backlink to
119 the real section this "virtual" section is contained in, and BUFFER,SIZE
120 describe the virtual section. */
122 struct dwarf2_section_info
126 /* If this is a real section, the bfd section. */
128 /* If this is a virtual section, pointer to the containing ("real")
130 struct dwarf2_section_info
*containing_section
;
132 /* Pointer to section data, only valid if readin. */
133 const gdb_byte
*buffer
;
134 /* The size of the section, real or virtual. */
136 /* If this is a virtual section, the offset in the real section.
137 Only valid if is_virtual. */
138 bfd_size_type virtual_offset
;
139 /* True if we have tried to read this section. */
141 /* True if this is a virtual section, False otherwise.
142 This specifies which of s.section and s.containing_section to use. */
146 typedef struct dwarf2_section_info dwarf2_section_info_def
;
147 DEF_VEC_O (dwarf2_section_info_def
);
149 /* All offsets in the index are of this type. It must be
150 architecture-independent. */
151 typedef uint32_t offset_type
;
153 DEF_VEC_I (offset_type
);
155 /* Ensure only legit values are used. */
156 #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \
158 gdb_assert ((unsigned int) (value) <= 1); \
159 GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \
162 /* Ensure only legit values are used. */
163 #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \
165 gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \
166 && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \
167 GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \
170 /* Ensure we don't use more than the alloted nuber of bits for the CU. */
171 #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \
173 gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \
174 GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \
177 /* A description of the mapped index. The file format is described in
178 a comment by the code that writes the index. */
181 /* Index data format version. */
184 /* The total length of the buffer. */
187 /* A pointer to the address table data. */
188 const gdb_byte
*address_table
;
190 /* Size of the address table data in bytes. */
191 offset_type address_table_size
;
193 /* The symbol table, implemented as a hash table. */
194 const offset_type
*symbol_table
;
196 /* Size in slots, each slot is 2 offset_types. */
197 offset_type symbol_table_slots
;
199 /* A pointer to the constant pool. */
200 const char *constant_pool
;
203 typedef struct dwarf2_per_cu_data
*dwarf2_per_cu_ptr
;
204 DEF_VEC_P (dwarf2_per_cu_ptr
);
208 int nr_uniq_abbrev_tables
;
210 int nr_symtab_sharers
;
211 int nr_stmt_less_type_units
;
212 int nr_all_type_units_reallocs
;
215 /* Collection of data recorded per objfile.
216 This hangs off of dwarf2_objfile_data_key. */
218 struct dwarf2_per_objfile
220 struct dwarf2_section_info info
;
221 struct dwarf2_section_info abbrev
;
222 struct dwarf2_section_info line
;
223 struct dwarf2_section_info loc
;
224 struct dwarf2_section_info macinfo
;
225 struct dwarf2_section_info macro
;
226 struct dwarf2_section_info str
;
227 struct dwarf2_section_info ranges
;
228 struct dwarf2_section_info addr
;
229 struct dwarf2_section_info frame
;
230 struct dwarf2_section_info eh_frame
;
231 struct dwarf2_section_info gdb_index
;
233 VEC (dwarf2_section_info_def
) *types
;
236 struct objfile
*objfile
;
238 /* Table of all the compilation units. This is used to locate
239 the target compilation unit of a particular reference. */
240 struct dwarf2_per_cu_data
**all_comp_units
;
242 /* The number of compilation units in ALL_COMP_UNITS. */
245 /* The number of .debug_types-related CUs. */
248 /* The number of elements allocated in all_type_units.
249 If there are skeleton-less TUs, we add them to all_type_units lazily. */
250 int n_allocated_type_units
;
252 /* The .debug_types-related CUs (TUs).
253 This is stored in malloc space because we may realloc it. */
254 struct signatured_type
**all_type_units
;
256 /* Table of struct type_unit_group objects.
257 The hash key is the DW_AT_stmt_list value. */
258 htab_t type_unit_groups
;
260 /* A table mapping .debug_types signatures to its signatured_type entry.
261 This is NULL if the .debug_types section hasn't been read in yet. */
262 htab_t signatured_types
;
264 /* Type unit statistics, to see how well the scaling improvements
266 struct tu_stats tu_stats
;
268 /* A chain of compilation units that are currently read in, so that
269 they can be freed later. */
270 struct dwarf2_per_cu_data
*read_in_chain
;
272 /* A table mapping DW_AT_dwo_name values to struct dwo_file objects.
273 This is NULL if the table hasn't been allocated yet. */
276 /* Non-zero if we've check for whether there is a DWP file. */
279 /* The DWP file if there is one, or NULL. */
280 struct dwp_file
*dwp_file
;
282 /* The shared '.dwz' file, if one exists. This is used when the
283 original data was compressed using 'dwz -m'. */
284 struct dwz_file
*dwz_file
;
286 /* A flag indicating wether this objfile has a section loaded at a
288 int has_section_at_zero
;
290 /* True if we are using the mapped index,
291 or we are faking it for OBJF_READNOW's sake. */
292 unsigned char using_index
;
294 /* The mapped index, or NULL if .gdb_index is missing or not being used. */
295 struct mapped_index
*index_table
;
297 /* When using index_table, this keeps track of all quick_file_names entries.
298 TUs typically share line table entries with a CU, so we maintain a
299 separate table of all line table entries to support the sharing.
300 Note that while there can be way more TUs than CUs, we've already
301 sorted all the TUs into "type unit groups", grouped by their
302 DW_AT_stmt_list value. Therefore the only sharing done here is with a
303 CU and its associated TU group if there is one. */
304 htab_t quick_file_names_table
;
306 /* Set during partial symbol reading, to prevent queueing of full
308 int reading_partial_symbols
;
310 /* Table mapping type DIEs to their struct type *.
311 This is NULL if not allocated yet.
312 The mapping is done via (CU/TU + DIE offset) -> type. */
313 htab_t die_type_hash
;
315 /* The CUs we recently read. */
316 VEC (dwarf2_per_cu_ptr
) *just_read_cus
;
318 /* Table containing line_header indexed by offset and offset_in_dwz. */
319 htab_t line_header_hash
;
322 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
324 /* Default names of the debugging sections. */
326 /* Note that if the debugging section has been compressed, it might
327 have a name like .zdebug_info. */
329 static const struct dwarf2_debug_sections dwarf2_elf_names
=
331 { ".debug_info", ".zdebug_info" },
332 { ".debug_abbrev", ".zdebug_abbrev" },
333 { ".debug_line", ".zdebug_line" },
334 { ".debug_loc", ".zdebug_loc" },
335 { ".debug_macinfo", ".zdebug_macinfo" },
336 { ".debug_macro", ".zdebug_macro" },
337 { ".debug_str", ".zdebug_str" },
338 { ".debug_ranges", ".zdebug_ranges" },
339 { ".debug_types", ".zdebug_types" },
340 { ".debug_addr", ".zdebug_addr" },
341 { ".debug_frame", ".zdebug_frame" },
342 { ".eh_frame", NULL
},
343 { ".gdb_index", ".zgdb_index" },
347 /* List of DWO/DWP sections. */
349 static const struct dwop_section_names
351 struct dwarf2_section_names abbrev_dwo
;
352 struct dwarf2_section_names info_dwo
;
353 struct dwarf2_section_names line_dwo
;
354 struct dwarf2_section_names loc_dwo
;
355 struct dwarf2_section_names macinfo_dwo
;
356 struct dwarf2_section_names macro_dwo
;
357 struct dwarf2_section_names str_dwo
;
358 struct dwarf2_section_names str_offsets_dwo
;
359 struct dwarf2_section_names types_dwo
;
360 struct dwarf2_section_names cu_index
;
361 struct dwarf2_section_names tu_index
;
365 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
366 { ".debug_info.dwo", ".zdebug_info.dwo" },
367 { ".debug_line.dwo", ".zdebug_line.dwo" },
368 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
369 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
370 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
371 { ".debug_str.dwo", ".zdebug_str.dwo" },
372 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
373 { ".debug_types.dwo", ".zdebug_types.dwo" },
374 { ".debug_cu_index", ".zdebug_cu_index" },
375 { ".debug_tu_index", ".zdebug_tu_index" },
378 /* local data types */
380 /* The data in a compilation unit header, after target2host
381 translation, looks like this. */
382 struct comp_unit_head
386 unsigned char addr_size
;
387 unsigned char signed_addr_p
;
388 sect_offset abbrev_offset
;
390 /* Size of file offsets; either 4 or 8. */
391 unsigned int offset_size
;
393 /* Size of the length field; either 4 or 12. */
394 unsigned int initial_length_size
;
396 /* Offset to the first byte of this compilation unit header in the
397 .debug_info section, for resolving relative reference dies. */
400 /* Offset to first die in this cu from the start of the cu.
401 This will be the first byte following the compilation unit header. */
402 cu_offset first_die_offset
;
405 /* Type used for delaying computation of method physnames.
406 See comments for compute_delayed_physnames. */
407 struct delayed_method_info
409 /* The type to which the method is attached, i.e., its parent class. */
412 /* The index of the method in the type's function fieldlists. */
415 /* The index of the method in the fieldlist. */
418 /* The name of the DIE. */
421 /* The DIE associated with this method. */
422 struct die_info
*die
;
425 typedef struct delayed_method_info delayed_method_info
;
426 DEF_VEC_O (delayed_method_info
);
428 /* Internal state when decoding a particular compilation unit. */
431 /* The objfile containing this compilation unit. */
432 struct objfile
*objfile
;
434 /* The header of the compilation unit. */
435 struct comp_unit_head header
;
437 /* Base address of this compilation unit. */
438 CORE_ADDR base_address
;
440 /* Non-zero if base_address has been set. */
443 /* The language we are debugging. */
444 enum language language
;
445 const struct language_defn
*language_defn
;
447 const char *producer
;
449 /* The generic symbol table building routines have separate lists for
450 file scope symbols and all all other scopes (local scopes). So
451 we need to select the right one to pass to add_symbol_to_list().
452 We do it by keeping a pointer to the correct list in list_in_scope.
454 FIXME: The original dwarf code just treated the file scope as the
455 first local scope, and all other local scopes as nested local
456 scopes, and worked fine. Check to see if we really need to
457 distinguish these in buildsym.c. */
458 struct pending
**list_in_scope
;
460 /* The abbrev table for this CU.
461 Normally this points to the abbrev table in the objfile.
462 But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */
463 struct abbrev_table
*abbrev_table
;
465 /* Hash table holding all the loaded partial DIEs
466 with partial_die->offset.SECT_OFF as hash. */
469 /* Storage for things with the same lifetime as this read-in compilation
470 unit, including partial DIEs. */
471 struct obstack comp_unit_obstack
;
473 /* When multiple dwarf2_cu structures are living in memory, this field
474 chains them all together, so that they can be released efficiently.
475 We will probably also want a generation counter so that most-recently-used
476 compilation units are cached... */
477 struct dwarf2_per_cu_data
*read_in_chain
;
479 /* Backlink to our per_cu entry. */
480 struct dwarf2_per_cu_data
*per_cu
;
482 /* How many compilation units ago was this CU last referenced? */
485 /* A hash table of DIE cu_offset for following references with
486 die_info->offset.sect_off as hash. */
489 /* Full DIEs if read in. */
490 struct die_info
*dies
;
492 /* A set of pointers to dwarf2_per_cu_data objects for compilation
493 units referenced by this one. Only set during full symbol processing;
494 partial symbol tables do not have dependencies. */
497 /* Header data from the line table, during full symbol processing. */
498 struct line_header
*line_header
;
500 /* A list of methods which need to have physnames computed
501 after all type information has been read. */
502 VEC (delayed_method_info
) *method_list
;
504 /* To be copied to symtab->call_site_htab. */
505 htab_t call_site_htab
;
507 /* Non-NULL if this CU came from a DWO file.
508 There is an invariant here that is important to remember:
509 Except for attributes copied from the top level DIE in the "main"
510 (or "stub") file in preparation for reading the DWO file
511 (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
512 Either there isn't a DWO file (in which case this is NULL and the point
513 is moot), or there is and either we're not going to read it (in which
514 case this is NULL) or there is and we are reading it (in which case this
516 struct dwo_unit
*dwo_unit
;
518 /* The DW_AT_addr_base attribute if present, zero otherwise
519 (zero is a valid value though).
520 Note this value comes from the Fission stub CU/TU's DIE. */
523 /* The DW_AT_ranges_base attribute if present, zero otherwise
524 (zero is a valid value though).
525 Note this value comes from the Fission stub CU/TU's DIE.
526 Also note that the value is zero in the non-DWO case so this value can
527 be used without needing to know whether DWO files are in use or not.
528 N.B. This does not apply to DW_AT_ranges appearing in
529 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
530 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
531 DW_AT_ranges_base *would* have to be applied, and we'd have to care
532 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
533 ULONGEST ranges_base
;
535 /* Mark used when releasing cached dies. */
536 unsigned int mark
: 1;
538 /* This CU references .debug_loc. See the symtab->locations_valid field.
539 This test is imperfect as there may exist optimized debug code not using
540 any location list and still facing inlining issues if handled as
541 unoptimized code. For a future better test see GCC PR other/32998. */
542 unsigned int has_loclist
: 1;
544 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set
545 if all the producer_is_* fields are valid. This information is cached
546 because profiling CU expansion showed excessive time spent in
547 producer_is_gxx_lt_4_6. */
548 unsigned int checked_producer
: 1;
549 unsigned int producer_is_gxx_lt_4_6
: 1;
550 unsigned int producer_is_gcc_lt_4_3
: 1;
551 unsigned int producer_is_icc
: 1;
553 /* When set, the file that we're processing is known to have
554 debugging info for C++ namespaces. GCC 3.3.x did not produce
555 this information, but later versions do. */
557 unsigned int processing_has_namespace_info
: 1;
560 /* Persistent data held for a compilation unit, even when not
561 processing it. We put a pointer to this structure in the
562 read_symtab_private field of the psymtab. */
564 struct dwarf2_per_cu_data
566 /* The start offset and length of this compilation unit.
567 NOTE: Unlike comp_unit_head.length, this length includes
569 If the DIE refers to a DWO file, this is always of the original die,
574 /* Flag indicating this compilation unit will be read in before
575 any of the current compilation units are processed. */
576 unsigned int queued
: 1;
578 /* This flag will be set when reading partial DIEs if we need to load
579 absolutely all DIEs for this compilation unit, instead of just the ones
580 we think are interesting. It gets set if we look for a DIE in the
581 hash table and don't find it. */
582 unsigned int load_all_dies
: 1;
584 /* Non-zero if this CU is from .debug_types.
585 Struct dwarf2_per_cu_data is contained in struct signatured_type iff
587 unsigned int is_debug_types
: 1;
589 /* Non-zero if this CU is from the .dwz file. */
590 unsigned int is_dwz
: 1;
592 /* Non-zero if reading a TU directly from a DWO file, bypassing the stub.
593 This flag is only valid if is_debug_types is true.
594 We can't read a CU directly from a DWO file: There are required
595 attributes in the stub. */
596 unsigned int reading_dwo_directly
: 1;
598 /* Non-zero if the TU has been read.
599 This is used to assist the "Stay in DWO Optimization" for Fission:
600 When reading a DWO, it's faster to read TUs from the DWO instead of
601 fetching them from random other DWOs (due to comdat folding).
602 If the TU has already been read, the optimization is unnecessary
603 (and unwise - we don't want to change where gdb thinks the TU lives
605 This flag is only valid if is_debug_types is true. */
606 unsigned int tu_read
: 1;
608 /* The section this CU/TU lives in.
609 If the DIE refers to a DWO file, this is always the original die,
611 struct dwarf2_section_info
*section
;
613 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
614 of the CU cache it gets reset to NULL again. This is left as NULL for
615 dummy CUs (a CU header, but nothing else). */
616 struct dwarf2_cu
*cu
;
618 /* The corresponding objfile.
619 Normally we can get the objfile from dwarf2_per_objfile.
620 However we can enter this file with just a "per_cu" handle. */
621 struct objfile
*objfile
;
623 /* When dwarf2_per_objfile->using_index is true, the 'quick' field
624 is active. Otherwise, the 'psymtab' field is active. */
627 /* The partial symbol table associated with this compilation unit,
628 or NULL for unread partial units. */
629 struct partial_symtab
*psymtab
;
631 /* Data needed by the "quick" functions. */
632 struct dwarf2_per_cu_quick_data
*quick
;
635 /* The CUs we import using DW_TAG_imported_unit. This is filled in
636 while reading psymtabs, used to compute the psymtab dependencies,
637 and then cleared. Then it is filled in again while reading full
638 symbols, and only deleted when the objfile is destroyed.
640 This is also used to work around a difference between the way gold
641 generates .gdb_index version <=7 and the way gdb does. Arguably this
642 is a gold bug. For symbols coming from TUs, gold records in the index
643 the CU that includes the TU instead of the TU itself. This breaks
644 dw2_lookup_symbol: It assumes that if the index says symbol X lives
645 in CU/TU Y, then one need only expand Y and a subsequent lookup in Y
646 will find X. Alas TUs live in their own symtab, so after expanding CU Y
647 we need to look in TU Z to find X. Fortunately, this is akin to
648 DW_TAG_imported_unit, so we just use the same mechanism: For
649 .gdb_index version <=7 this also records the TUs that the CU referred
650 to. Concurrently with this change gdb was modified to emit version 8
651 indices so we only pay a price for gold generated indices.
652 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
653 VEC (dwarf2_per_cu_ptr
) *imported_symtabs
;
656 /* Entry in the signatured_types hash table. */
658 struct signatured_type
660 /* The "per_cu" object of this type.
661 This struct is used iff per_cu.is_debug_types.
662 N.B.: This is the first member so that it's easy to convert pointers
664 struct dwarf2_per_cu_data per_cu
;
666 /* The type's signature. */
669 /* Offset in the TU of the type's DIE, as read from the TU header.
670 If this TU is a DWO stub and the definition lives in a DWO file
671 (specified by DW_AT_GNU_dwo_name), this value is unusable. */
672 cu_offset type_offset_in_tu
;
674 /* Offset in the section of the type's DIE.
675 If the definition lives in a DWO file, this is the offset in the
676 .debug_types.dwo section.
677 The value is zero until the actual value is known.
678 Zero is otherwise not a valid section offset. */
679 sect_offset type_offset_in_section
;
681 /* Type units are grouped by their DW_AT_stmt_list entry so that they
682 can share them. This points to the containing symtab. */
683 struct type_unit_group
*type_unit_group
;
686 The first time we encounter this type we fully read it in and install it
687 in the symbol tables. Subsequent times we only need the type. */
690 /* Containing DWO unit.
691 This field is valid iff per_cu.reading_dwo_directly. */
692 struct dwo_unit
*dwo_unit
;
695 typedef struct signatured_type
*sig_type_ptr
;
696 DEF_VEC_P (sig_type_ptr
);
698 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
699 This includes type_unit_group and quick_file_names. */
701 struct stmt_list_hash
703 /* The DWO unit this table is from or NULL if there is none. */
704 struct dwo_unit
*dwo_unit
;
706 /* Offset in .debug_line or .debug_line.dwo. */
707 sect_offset line_offset
;
710 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
711 an object of this type. */
713 struct type_unit_group
715 /* dwarf2read.c's main "handle" on a TU symtab.
716 To simplify things we create an artificial CU that "includes" all the
717 type units using this stmt_list so that the rest of the code still has
718 a "per_cu" handle on the symtab.
719 This PER_CU is recognized by having no section. */
720 #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL)
721 struct dwarf2_per_cu_data per_cu
;
723 /* The TUs that share this DW_AT_stmt_list entry.
724 This is added to while parsing type units to build partial symtabs,
725 and is deleted afterwards and not used again. */
726 VEC (sig_type_ptr
) *tus
;
728 /* The compunit symtab.
729 Type units in a group needn't all be defined in the same source file,
730 so we create an essentially anonymous symtab as the compunit symtab. */
731 struct compunit_symtab
*compunit_symtab
;
733 /* The data used to construct the hash key. */
734 struct stmt_list_hash hash
;
736 /* The number of symtabs from the line header.
737 The value here must match line_header.num_file_names. */
738 unsigned int num_symtabs
;
740 /* The symbol tables for this TU (obtained from the files listed in
742 WARNING: The order of entries here must match the order of entries
743 in the line header. After the first TU using this type_unit_group, the
744 line header for the subsequent TUs is recreated from this. This is done
745 because we need to use the same symtabs for each TU using the same
746 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
747 there's no guarantee the line header doesn't have duplicate entries. */
748 struct symtab
**symtabs
;
751 /* These sections are what may appear in a (real or virtual) DWO file. */
755 struct dwarf2_section_info abbrev
;
756 struct dwarf2_section_info line
;
757 struct dwarf2_section_info loc
;
758 struct dwarf2_section_info macinfo
;
759 struct dwarf2_section_info macro
;
760 struct dwarf2_section_info str
;
761 struct dwarf2_section_info str_offsets
;
762 /* In the case of a virtual DWO file, these two are unused. */
763 struct dwarf2_section_info info
;
764 VEC (dwarf2_section_info_def
) *types
;
767 /* CUs/TUs in DWP/DWO files. */
771 /* Backlink to the containing struct dwo_file. */
772 struct dwo_file
*dwo_file
;
774 /* The "id" that distinguishes this CU/TU.
775 .debug_info calls this "dwo_id", .debug_types calls this "signature".
776 Since signatures came first, we stick with it for consistency. */
779 /* The section this CU/TU lives in, in the DWO file. */
780 struct dwarf2_section_info
*section
;
782 /* Same as dwarf2_per_cu_data:{offset,length} but in the DWO section. */
786 /* For types, offset in the type's DIE of the type defined by this TU. */
787 cu_offset type_offset_in_tu
;
790 /* include/dwarf2.h defines the DWP section codes.
791 It defines a max value but it doesn't define a min value, which we
792 use for error checking, so provide one. */
794 enum dwp_v2_section_ids
799 /* Data for one DWO file.
801 This includes virtual DWO files (a virtual DWO file is a DWO file as it
802 appears in a DWP file). DWP files don't really have DWO files per se -
803 comdat folding of types "loses" the DWO file they came from, and from
804 a high level view DWP files appear to contain a mass of random types.
805 However, to maintain consistency with the non-DWP case we pretend DWP
806 files contain virtual DWO files, and we assign each TU with one virtual
807 DWO file (generally based on the line and abbrev section offsets -
808 a heuristic that seems to work in practice). */
812 /* The DW_AT_GNU_dwo_name attribute.
813 For virtual DWO files the name is constructed from the section offsets
814 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
815 from related CU+TUs. */
816 const char *dwo_name
;
818 /* The DW_AT_comp_dir attribute. */
819 const char *comp_dir
;
821 /* The bfd, when the file is open. Otherwise this is NULL.
822 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
825 /* The sections that make up this DWO file.
826 Remember that for virtual DWO files in DWP V2, these are virtual
827 sections (for lack of a better name). */
828 struct dwo_sections sections
;
830 /* The CU in the file.
831 We only support one because having more than one requires hacking the
832 dwo_name of each to match, which is highly unlikely to happen.
833 Doing this means all TUs can share comp_dir: We also assume that
834 DW_AT_comp_dir across all TUs in a DWO file will be identical. */
837 /* Table of TUs in the file.
838 Each element is a struct dwo_unit. */
842 /* These sections are what may appear in a DWP file. */
846 /* These are used by both DWP version 1 and 2. */
847 struct dwarf2_section_info str
;
848 struct dwarf2_section_info cu_index
;
849 struct dwarf2_section_info tu_index
;
851 /* These are only used by DWP version 2 files.
852 In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other
853 sections are referenced by section number, and are not recorded here.
854 In DWP version 2 there is at most one copy of all these sections, each
855 section being (effectively) comprised of the concatenation of all of the
856 individual sections that exist in the version 1 format.
857 To keep the code simple we treat each of these concatenated pieces as a
858 section itself (a virtual section?). */
859 struct dwarf2_section_info abbrev
;
860 struct dwarf2_section_info info
;
861 struct dwarf2_section_info line
;
862 struct dwarf2_section_info loc
;
863 struct dwarf2_section_info macinfo
;
864 struct dwarf2_section_info macro
;
865 struct dwarf2_section_info str_offsets
;
866 struct dwarf2_section_info types
;
869 /* These sections are what may appear in a virtual DWO file in DWP version 1.
870 A virtual DWO file is a DWO file as it appears in a DWP file. */
872 struct virtual_v1_dwo_sections
874 struct dwarf2_section_info abbrev
;
875 struct dwarf2_section_info line
;
876 struct dwarf2_section_info loc
;
877 struct dwarf2_section_info macinfo
;
878 struct dwarf2_section_info macro
;
879 struct dwarf2_section_info str_offsets
;
880 /* Each DWP hash table entry records one CU or one TU.
881 That is recorded here, and copied to dwo_unit.section. */
882 struct dwarf2_section_info info_or_types
;
885 /* Similar to virtual_v1_dwo_sections, but for DWP version 2.
886 In version 2, the sections of the DWO files are concatenated together
887 and stored in one section of that name. Thus each ELF section contains
888 several "virtual" sections. */
890 struct virtual_v2_dwo_sections
892 bfd_size_type abbrev_offset
;
893 bfd_size_type abbrev_size
;
895 bfd_size_type line_offset
;
896 bfd_size_type line_size
;
898 bfd_size_type loc_offset
;
899 bfd_size_type loc_size
;
901 bfd_size_type macinfo_offset
;
902 bfd_size_type macinfo_size
;
904 bfd_size_type macro_offset
;
905 bfd_size_type macro_size
;
907 bfd_size_type str_offsets_offset
;
908 bfd_size_type str_offsets_size
;
910 /* Each DWP hash table entry records one CU or one TU.
911 That is recorded here, and copied to dwo_unit.section. */
912 bfd_size_type info_or_types_offset
;
913 bfd_size_type info_or_types_size
;
916 /* Contents of DWP hash tables. */
918 struct dwp_hash_table
920 uint32_t version
, nr_columns
;
921 uint32_t nr_units
, nr_slots
;
922 const gdb_byte
*hash_table
, *unit_table
;
927 const gdb_byte
*indices
;
931 /* This is indexed by column number and gives the id of the section
933 #define MAX_NR_V2_DWO_SECTIONS \
934 (1 /* .debug_info or .debug_types */ \
935 + 1 /* .debug_abbrev */ \
936 + 1 /* .debug_line */ \
937 + 1 /* .debug_loc */ \
938 + 1 /* .debug_str_offsets */ \
939 + 1 /* .debug_macro or .debug_macinfo */)
940 int section_ids
[MAX_NR_V2_DWO_SECTIONS
];
941 const gdb_byte
*offsets
;
942 const gdb_byte
*sizes
;
947 /* Data for one DWP file. */
951 /* Name of the file. */
954 /* File format version. */
960 /* Section info for this file. */
961 struct dwp_sections sections
;
963 /* Table of CUs in the file. */
964 const struct dwp_hash_table
*cus
;
966 /* Table of TUs in the file. */
967 const struct dwp_hash_table
*tus
;
969 /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
973 /* Table to map ELF section numbers to their sections.
974 This is only needed for the DWP V1 file format. */
975 unsigned int num_sections
;
976 asection
**elf_sections
;
979 /* This represents a '.dwz' file. */
983 /* A dwz file can only contain a few sections. */
984 struct dwarf2_section_info abbrev
;
985 struct dwarf2_section_info info
;
986 struct dwarf2_section_info str
;
987 struct dwarf2_section_info line
;
988 struct dwarf2_section_info macro
;
989 struct dwarf2_section_info gdb_index
;
995 /* Struct used to pass misc. parameters to read_die_and_children, et
996 al. which are used for both .debug_info and .debug_types dies.
997 All parameters here are unchanging for the life of the call. This
998 struct exists to abstract away the constant parameters of die reading. */
1000 struct die_reader_specs
1002 /* The bfd of die_section. */
1005 /* The CU of the DIE we are parsing. */
1006 struct dwarf2_cu
*cu
;
1008 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
1009 struct dwo_file
*dwo_file
;
1011 /* The section the die comes from.
1012 This is either .debug_info or .debug_types, or the .dwo variants. */
1013 struct dwarf2_section_info
*die_section
;
1015 /* die_section->buffer. */
1016 const gdb_byte
*buffer
;
1018 /* The end of the buffer. */
1019 const gdb_byte
*buffer_end
;
1021 /* The value of the DW_AT_comp_dir attribute. */
1022 const char *comp_dir
;
1025 /* Type of function passed to init_cutu_and_read_dies, et.al. */
1026 typedef void (die_reader_func_ftype
) (const struct die_reader_specs
*reader
,
1027 const gdb_byte
*info_ptr
,
1028 struct die_info
*comp_unit_die
,
1035 unsigned int dir_index
;
1036 unsigned int mod_time
;
1037 unsigned int length
;
1038 /* Non-zero if referenced by the Line Number Program. */
1040 /* The associated symbol table, if any. */
1041 struct symtab
*symtab
;
1044 /* The line number information for a compilation unit (found in the
1045 .debug_line section) begins with a "statement program header",
1046 which contains the following information. */
1049 /* Offset of line number information in .debug_line section. */
1052 /* OFFSET is for struct dwz_file associated with dwarf2_per_objfile. */
1053 unsigned offset_in_dwz
: 1;
1055 unsigned int total_length
;
1056 unsigned short version
;
1057 unsigned int header_length
;
1058 unsigned char minimum_instruction_length
;
1059 unsigned char maximum_ops_per_instruction
;
1060 unsigned char default_is_stmt
;
1062 unsigned char line_range
;
1063 unsigned char opcode_base
;
1065 /* standard_opcode_lengths[i] is the number of operands for the
1066 standard opcode whose value is i. This means that
1067 standard_opcode_lengths[0] is unused, and the last meaningful
1068 element is standard_opcode_lengths[opcode_base - 1]. */
1069 unsigned char *standard_opcode_lengths
;
1071 /* The include_directories table. NOTE! These strings are not
1072 allocated with xmalloc; instead, they are pointers into
1073 debug_line_buffer. If you try to free them, `free' will get
1075 unsigned int num_include_dirs
, include_dirs_size
;
1076 const char **include_dirs
;
1078 /* The file_names table. NOTE! These strings are not allocated
1079 with xmalloc; instead, they are pointers into debug_line_buffer.
1080 Don't try to free them directly. */
1081 unsigned int num_file_names
, file_names_size
;
1082 struct file_entry
*file_names
;
1084 /* The start and end of the statement program following this
1085 header. These point into dwarf2_per_objfile->line_buffer. */
1086 const gdb_byte
*statement_program_start
, *statement_program_end
;
1089 /* When we construct a partial symbol table entry we only
1090 need this much information. */
1091 struct partial_die_info
1093 /* Offset of this DIE. */
1096 /* DWARF-2 tag for this DIE. */
1097 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1099 /* Assorted flags describing the data found in this DIE. */
1100 unsigned int has_children
: 1;
1101 unsigned int is_external
: 1;
1102 unsigned int is_declaration
: 1;
1103 unsigned int has_type
: 1;
1104 unsigned int has_specification
: 1;
1105 unsigned int has_pc_info
: 1;
1106 unsigned int may_be_inlined
: 1;
1108 /* Flag set if the SCOPE field of this structure has been
1110 unsigned int scope_set
: 1;
1112 /* Flag set if the DIE has a byte_size attribute. */
1113 unsigned int has_byte_size
: 1;
1115 /* Flag set if the DIE has a DW_AT_const_value attribute. */
1116 unsigned int has_const_value
: 1;
1118 /* Flag set if any of the DIE's children are template arguments. */
1119 unsigned int has_template_arguments
: 1;
1121 /* Flag set if fixup_partial_die has been called on this die. */
1122 unsigned int fixup_called
: 1;
1124 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
1125 unsigned int is_dwz
: 1;
1127 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
1128 unsigned int spec_is_dwz
: 1;
1130 /* The name of this DIE. Normally the value of DW_AT_name, but
1131 sometimes a default name for unnamed DIEs. */
1134 /* The linkage name, if present. */
1135 const char *linkage_name
;
1137 /* The scope to prepend to our children. This is generally
1138 allocated on the comp_unit_obstack, so will disappear
1139 when this compilation unit leaves the cache. */
1142 /* Some data associated with the partial DIE. The tag determines
1143 which field is live. */
1146 /* The location description associated with this DIE, if any. */
1147 struct dwarf_block
*locdesc
;
1148 /* The offset of an import, for DW_TAG_imported_unit. */
1152 /* If HAS_PC_INFO, the PC range associated with this DIE. */
1156 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
1157 DW_AT_sibling, if any. */
1158 /* NOTE: This member isn't strictly necessary, read_partial_die could
1159 return DW_AT_sibling values to its caller load_partial_dies. */
1160 const gdb_byte
*sibling
;
1162 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
1163 DW_AT_specification (or DW_AT_abstract_origin or
1164 DW_AT_extension). */
1165 sect_offset spec_offset
;
1167 /* Pointers to this DIE's parent, first child, and next sibling,
1169 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
1172 /* This data structure holds the information of an abbrev. */
1175 unsigned int number
; /* number identifying abbrev */
1176 enum dwarf_tag tag
; /* dwarf tag */
1177 unsigned short has_children
; /* boolean */
1178 unsigned short num_attrs
; /* number of attributes */
1179 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
1180 struct abbrev_info
*next
; /* next in chain */
1185 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1186 ENUM_BITFIELD(dwarf_form
) form
: 16;
1189 /* Size of abbrev_table.abbrev_hash_table. */
1190 #define ABBREV_HASH_SIZE 121
1192 /* Top level data structure to contain an abbreviation table. */
1196 /* Where the abbrev table came from.
1197 This is used as a sanity check when the table is used. */
1200 /* Storage for the abbrev table. */
1201 struct obstack abbrev_obstack
;
1203 /* Hash table of abbrevs.
1204 This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
1205 It could be statically allocated, but the previous code didn't so we
1207 struct abbrev_info
**abbrevs
;
1210 /* Attributes have a name and a value. */
1213 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1214 ENUM_BITFIELD(dwarf_form
) form
: 15;
1216 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
1217 field should be in u.str (existing only for DW_STRING) but it is kept
1218 here for better struct attribute alignment. */
1219 unsigned int string_is_canonical
: 1;
1224 struct dwarf_block
*blk
;
1233 /* This data structure holds a complete die structure. */
1236 /* DWARF-2 tag for this DIE. */
1237 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1239 /* Number of attributes */
1240 unsigned char num_attrs
;
1242 /* True if we're presently building the full type name for the
1243 type derived from this DIE. */
1244 unsigned char building_fullname
: 1;
1246 /* True if this die is in process. PR 16581. */
1247 unsigned char in_process
: 1;
1250 unsigned int abbrev
;
1252 /* Offset in .debug_info or .debug_types section. */
1255 /* The dies in a compilation unit form an n-ary tree. PARENT
1256 points to this die's parent; CHILD points to the first child of
1257 this node; and all the children of a given node are chained
1258 together via their SIBLING fields. */
1259 struct die_info
*child
; /* Its first child, if any. */
1260 struct die_info
*sibling
; /* Its next sibling, if any. */
1261 struct die_info
*parent
; /* Its parent, if any. */
1263 /* An array of attributes, with NUM_ATTRS elements. There may be
1264 zero, but it's not common and zero-sized arrays are not
1265 sufficiently portable C. */
1266 struct attribute attrs
[1];
1269 /* Get at parts of an attribute structure. */
1271 #define DW_STRING(attr) ((attr)->u.str)
1272 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
1273 #define DW_UNSND(attr) ((attr)->u.unsnd)
1274 #define DW_BLOCK(attr) ((attr)->u.blk)
1275 #define DW_SND(attr) ((attr)->u.snd)
1276 #define DW_ADDR(attr) ((attr)->u.addr)
1277 #define DW_SIGNATURE(attr) ((attr)->u.signature)
1279 /* Blocks are a bunch of untyped bytes. */
1284 /* Valid only if SIZE is not zero. */
1285 const gdb_byte
*data
;
1288 #ifndef ATTR_ALLOC_CHUNK
1289 #define ATTR_ALLOC_CHUNK 4
1292 /* Allocate fields for structs, unions and enums in this size. */
1293 #ifndef DW_FIELD_ALLOC_CHUNK
1294 #define DW_FIELD_ALLOC_CHUNK 4
1297 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1298 but this would require a corresponding change in unpack_field_as_long
1300 static int bits_per_byte
= 8;
1304 struct nextfield
*next
;
1312 struct nextfnfield
*next
;
1313 struct fn_field fnfield
;
1320 struct nextfnfield
*head
;
1323 struct typedef_field_list
1325 struct typedef_field field
;
1326 struct typedef_field_list
*next
;
1329 /* The routines that read and process dies for a C struct or C++ class
1330 pass lists of data member fields and lists of member function fields
1331 in an instance of a field_info structure, as defined below. */
1334 /* List of data member and baseclasses fields. */
1335 struct nextfield
*fields
, *baseclasses
;
1337 /* Number of fields (including baseclasses). */
1340 /* Number of baseclasses. */
1343 /* Set if the accesibility of one of the fields is not public. */
1344 int non_public_fields
;
1346 /* Member function fields array, entries are allocated in the order they
1347 are encountered in the object file. */
1348 struct nextfnfield
*fnfields
;
1350 /* Member function fieldlist array, contains name of possibly overloaded
1351 member function, number of overloaded member functions and a pointer
1352 to the head of the member function field chain. */
1353 struct fnfieldlist
*fnfieldlists
;
1355 /* Number of entries in the fnfieldlists array. */
1358 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1359 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1360 struct typedef_field_list
*typedef_field_list
;
1361 unsigned typedef_field_list_count
;
1364 /* One item on the queue of compilation units to read in full symbols
1366 struct dwarf2_queue_item
1368 struct dwarf2_per_cu_data
*per_cu
;
1369 enum language pretend_language
;
1370 struct dwarf2_queue_item
*next
;
1373 /* The current queue. */
1374 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
1376 /* Loaded secondary compilation units are kept in memory until they
1377 have not been referenced for the processing of this many
1378 compilation units. Set this to zero to disable caching. Cache
1379 sizes of up to at least twenty will improve startup time for
1380 typical inter-CU-reference binaries, at an obvious memory cost. */
1381 static int dwarf_max_cache_age
= 5;
1383 show_dwarf_max_cache_age (struct ui_file
*file
, int from_tty
,
1384 struct cmd_list_element
*c
, const char *value
)
1386 fprintf_filtered (file
, _("The upper bound on the age of cached "
1387 "DWARF compilation units is %s.\n"),
1391 /* local function prototypes */
1393 static const char *get_section_name (const struct dwarf2_section_info
*);
1395 static const char *get_section_file_name (const struct dwarf2_section_info
*);
1397 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
1399 static void dwarf2_find_base_address (struct die_info
*die
,
1400 struct dwarf2_cu
*cu
);
1402 static struct partial_symtab
*create_partial_symtab
1403 (struct dwarf2_per_cu_data
*per_cu
, const char *name
);
1405 static void dwarf2_build_psymtabs_hard (struct objfile
*);
1407 static void scan_partial_symbols (struct partial_die_info
*,
1408 CORE_ADDR
*, CORE_ADDR
*,
1409 int, struct dwarf2_cu
*);
1411 static void add_partial_symbol (struct partial_die_info
*,
1412 struct dwarf2_cu
*);
1414 static void add_partial_namespace (struct partial_die_info
*pdi
,
1415 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1416 int set_addrmap
, struct dwarf2_cu
*cu
);
1418 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1419 CORE_ADDR
*highpc
, int set_addrmap
,
1420 struct dwarf2_cu
*cu
);
1422 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1423 struct dwarf2_cu
*cu
);
1425 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1426 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1427 int need_pc
, struct dwarf2_cu
*cu
);
1429 static void dwarf2_read_symtab (struct partial_symtab
*,
1432 static void psymtab_to_symtab_1 (struct partial_symtab
*);
1434 static struct abbrev_info
*abbrev_table_lookup_abbrev
1435 (const struct abbrev_table
*, unsigned int);
1437 static struct abbrev_table
*abbrev_table_read_table
1438 (struct dwarf2_section_info
*, sect_offset
);
1440 static void abbrev_table_free (struct abbrev_table
*);
1442 static void abbrev_table_free_cleanup (void *);
1444 static void dwarf2_read_abbrevs (struct dwarf2_cu
*,
1445 struct dwarf2_section_info
*);
1447 static void dwarf2_free_abbrev_table (void *);
1449 static unsigned int peek_abbrev_code (bfd
*, const gdb_byte
*);
1451 static struct partial_die_info
*load_partial_dies
1452 (const struct die_reader_specs
*, const gdb_byte
*, int);
1454 static const gdb_byte
*read_partial_die (const struct die_reader_specs
*,
1455 struct partial_die_info
*,
1456 struct abbrev_info
*,
1460 static struct partial_die_info
*find_partial_die (sect_offset
, int,
1461 struct dwarf2_cu
*);
1463 static void fixup_partial_die (struct partial_die_info
*,
1464 struct dwarf2_cu
*);
1466 static const gdb_byte
*read_attribute (const struct die_reader_specs
*,
1467 struct attribute
*, struct attr_abbrev
*,
1470 static unsigned int read_1_byte (bfd
*, const gdb_byte
*);
1472 static int read_1_signed_byte (bfd
*, const gdb_byte
*);
1474 static unsigned int read_2_bytes (bfd
*, const gdb_byte
*);
1476 static unsigned int read_4_bytes (bfd
*, const gdb_byte
*);
1478 static ULONGEST
read_8_bytes (bfd
*, const gdb_byte
*);
1480 static CORE_ADDR
read_address (bfd
*, const gdb_byte
*ptr
, struct dwarf2_cu
*,
1483 static LONGEST
read_initial_length (bfd
*, const gdb_byte
*, unsigned int *);
1485 static LONGEST read_checked_initial_length_and_offset
1486 (bfd
*, const gdb_byte
*, const struct comp_unit_head
*,
1487 unsigned int *, unsigned int *);
1489 static LONGEST
read_offset (bfd
*, const gdb_byte
*,
1490 const struct comp_unit_head
*,
1493 static LONGEST
read_offset_1 (bfd
*, const gdb_byte
*, unsigned int);
1495 static sect_offset
read_abbrev_offset (struct dwarf2_section_info
*,
1498 static const gdb_byte
*read_n_bytes (bfd
*, const gdb_byte
*, unsigned int);
1500 static const char *read_direct_string (bfd
*, const gdb_byte
*, unsigned int *);
1502 static const char *read_indirect_string (bfd
*, const gdb_byte
*,
1503 const struct comp_unit_head
*,
1506 static const char *read_indirect_string_from_dwz (struct dwz_file
*, LONGEST
);
1508 static ULONGEST
read_unsigned_leb128 (bfd
*, const gdb_byte
*, unsigned int *);
1510 static LONGEST
read_signed_leb128 (bfd
*, const gdb_byte
*, unsigned int *);
1512 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*,
1516 static const char *read_str_index (const struct die_reader_specs
*reader
,
1517 ULONGEST str_index
);
1519 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1521 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1522 struct dwarf2_cu
*);
1524 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
1527 static const char *dwarf2_string_attr (struct die_info
*die
, unsigned int name
,
1528 struct dwarf2_cu
*cu
);
1530 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1531 struct dwarf2_cu
*cu
);
1533 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1535 static struct die_info
*die_specification (struct die_info
*die
,
1536 struct dwarf2_cu
**);
1538 static void free_line_header (struct line_header
*lh
);
1540 static struct line_header
*dwarf_decode_line_header (unsigned int offset
,
1541 struct dwarf2_cu
*cu
);
1543 static void dwarf_decode_lines (struct line_header
*, const char *,
1544 struct dwarf2_cu
*, struct partial_symtab
*,
1545 CORE_ADDR
, int decode_mapping
);
1547 static void dwarf2_start_subfile (const char *, const char *);
1549 static struct compunit_symtab
*dwarf2_start_symtab (struct dwarf2_cu
*,
1550 const char *, const char *,
1553 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1554 struct dwarf2_cu
*);
1556 static struct symbol
*new_symbol_full (struct die_info
*, struct type
*,
1557 struct dwarf2_cu
*, struct symbol
*);
1559 static void dwarf2_const_value (const struct attribute
*, struct symbol
*,
1560 struct dwarf2_cu
*);
1562 static void dwarf2_const_value_attr (const struct attribute
*attr
,
1565 struct obstack
*obstack
,
1566 struct dwarf2_cu
*cu
, LONGEST
*value
,
1567 const gdb_byte
**bytes
,
1568 struct dwarf2_locexpr_baton
**baton
);
1570 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1572 static int need_gnat_info (struct dwarf2_cu
*);
1574 static struct type
*die_descriptive_type (struct die_info
*,
1575 struct dwarf2_cu
*);
1577 static void set_descriptive_type (struct type
*, struct die_info
*,
1578 struct dwarf2_cu
*);
1580 static struct type
*die_containing_type (struct die_info
*,
1581 struct dwarf2_cu
*);
1583 static struct type
*lookup_die_type (struct die_info
*, const struct attribute
*,
1584 struct dwarf2_cu
*);
1586 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1588 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1590 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1592 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1593 const char *suffix
, int physname
,
1594 struct dwarf2_cu
*cu
);
1596 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1598 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1600 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1602 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1604 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1606 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1607 struct dwarf2_cu
*, struct partial_symtab
*);
1609 /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return
1613 /* No valid combination of DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges
1615 PC_BOUNDS_NOT_PRESENT
,
1617 /* Discontiguous range was found - that is DW_AT_ranges was found. */
1620 /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */
1624 static enum pc_bounds_kind
dwarf2_get_pc_bounds (struct die_info
*,
1625 CORE_ADDR
*, CORE_ADDR
*,
1627 struct partial_symtab
*);
1629 static void get_scope_pc_bounds (struct die_info
*,
1630 CORE_ADDR
*, CORE_ADDR
*,
1631 struct dwarf2_cu
*);
1633 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1634 CORE_ADDR
, struct dwarf2_cu
*);
1636 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1637 struct dwarf2_cu
*);
1639 static void dwarf2_attach_fields_to_type (struct field_info
*,
1640 struct type
*, struct dwarf2_cu
*);
1642 static void dwarf2_add_member_fn (struct field_info
*,
1643 struct die_info
*, struct type
*,
1644 struct dwarf2_cu
*);
1646 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1648 struct dwarf2_cu
*);
1650 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1652 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1654 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1656 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1658 static struct using_direct
**using_directives (enum language
);
1660 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1662 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1664 static struct type
*read_module_type (struct die_info
*die
,
1665 struct dwarf2_cu
*cu
);
1667 static const char *namespace_name (struct die_info
*die
,
1668 int *is_anonymous
, struct dwarf2_cu
*);
1670 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1672 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1674 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1675 struct dwarf2_cu
*);
1677 static struct die_info
*read_die_and_siblings_1
1678 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1681 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1682 const gdb_byte
*info_ptr
,
1683 const gdb_byte
**new_info_ptr
,
1684 struct die_info
*parent
);
1686 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1687 struct die_info
**, const gdb_byte
*,
1690 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1691 struct die_info
**, const gdb_byte
*,
1694 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1696 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1699 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1701 static const char *dwarf2_full_name (const char *name
,
1702 struct die_info
*die
,
1703 struct dwarf2_cu
*cu
);
1705 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1706 struct dwarf2_cu
*cu
);
1708 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1709 struct dwarf2_cu
**);
1711 static const char *dwarf_tag_name (unsigned int);
1713 static const char *dwarf_attr_name (unsigned int);
1715 static const char *dwarf_form_name (unsigned int);
1717 static char *dwarf_bool_name (unsigned int);
1719 static const char *dwarf_type_encoding_name (unsigned int);
1721 static struct die_info
*sibling_die (struct die_info
*);
1723 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1725 static void dump_die_for_error (struct die_info
*);
1727 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1730 /*static*/ void dump_die (struct die_info
*, int max_level
);
1732 static void store_in_ref_table (struct die_info
*,
1733 struct dwarf2_cu
*);
1735 static sect_offset
dwarf2_get_ref_die_offset (const struct attribute
*);
1737 static LONGEST
dwarf2_get_attr_constant_value (const struct attribute
*, int);
1739 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1740 const struct attribute
*,
1741 struct dwarf2_cu
**);
1743 static struct die_info
*follow_die_ref (struct die_info
*,
1744 const struct attribute
*,
1745 struct dwarf2_cu
**);
1747 static struct die_info
*follow_die_sig (struct die_info
*,
1748 const struct attribute
*,
1749 struct dwarf2_cu
**);
1751 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1752 struct dwarf2_cu
*);
1754 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1755 const struct attribute
*,
1756 struct dwarf2_cu
*);
1758 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1760 static void read_signatured_type (struct signatured_type
*);
1762 static int attr_to_dynamic_prop (const struct attribute
*attr
,
1763 struct die_info
*die
, struct dwarf2_cu
*cu
,
1764 struct dynamic_prop
*prop
);
1766 /* memory allocation interface */
1768 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1770 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1772 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1774 static int attr_form_is_block (const struct attribute
*);
1776 static int attr_form_is_section_offset (const struct attribute
*);
1778 static int attr_form_is_constant (const struct attribute
*);
1780 static int attr_form_is_ref (const struct attribute
*);
1782 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1783 struct dwarf2_loclist_baton
*baton
,
1784 const struct attribute
*attr
);
1786 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1788 struct dwarf2_cu
*cu
,
1791 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1792 const gdb_byte
*info_ptr
,
1793 struct abbrev_info
*abbrev
);
1795 static void free_stack_comp_unit (void *);
1797 static hashval_t
partial_die_hash (const void *item
);
1799 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1801 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1802 (sect_offset offset
, unsigned int offset_in_dwz
, struct objfile
*objfile
);
1804 static void init_one_comp_unit (struct dwarf2_cu
*cu
,
1805 struct dwarf2_per_cu_data
*per_cu
);
1807 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1808 struct die_info
*comp_unit_die
,
1809 enum language pretend_language
);
1811 static void free_heap_comp_unit (void *);
1813 static void free_cached_comp_units (void *);
1815 static void age_cached_comp_units (void);
1817 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1819 static struct type
*set_die_type (struct die_info
*, struct type
*,
1820 struct dwarf2_cu
*);
1822 static void create_all_comp_units (struct objfile
*);
1824 static int create_all_type_units (struct objfile
*);
1826 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1829 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1832 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1835 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1836 struct dwarf2_per_cu_data
*);
1838 static void dwarf2_mark (struct dwarf2_cu
*);
1840 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1842 static struct type
*get_die_type_at_offset (sect_offset
,
1843 struct dwarf2_per_cu_data
*);
1845 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1847 static void dwarf2_release_queue (void *dummy
);
1849 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1850 enum language pretend_language
);
1852 static void process_queue (void);
1854 static void find_file_and_directory (struct die_info
*die
,
1855 struct dwarf2_cu
*cu
,
1856 const char **name
, const char **comp_dir
);
1858 static char *file_full_name (int file
, struct line_header
*lh
,
1859 const char *comp_dir
);
1861 static const gdb_byte
*read_and_check_comp_unit_head
1862 (struct comp_unit_head
*header
,
1863 struct dwarf2_section_info
*section
,
1864 struct dwarf2_section_info
*abbrev_section
, const gdb_byte
*info_ptr
,
1865 int is_debug_types_section
);
1867 static void init_cutu_and_read_dies
1868 (struct dwarf2_per_cu_data
*this_cu
, struct abbrev_table
*abbrev_table
,
1869 int use_existing_cu
, int keep
,
1870 die_reader_func_ftype
*die_reader_func
, void *data
);
1872 static void init_cutu_and_read_dies_simple
1873 (struct dwarf2_per_cu_data
*this_cu
,
1874 die_reader_func_ftype
*die_reader_func
, void *data
);
1876 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1878 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
1880 static struct dwo_unit
*lookup_dwo_unit_in_dwp
1881 (struct dwp_file
*dwp_file
, const char *comp_dir
,
1882 ULONGEST signature
, int is_debug_types
);
1884 static struct dwp_file
*get_dwp_file (void);
1886 static struct dwo_unit
*lookup_dwo_comp_unit
1887 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
1889 static struct dwo_unit
*lookup_dwo_type_unit
1890 (struct signatured_type
*, const char *, const char *);
1892 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
1894 static void free_dwo_file_cleanup (void *);
1896 static void process_cu_includes (void);
1898 static void check_producer (struct dwarf2_cu
*cu
);
1900 static void free_line_header_voidp (void *arg
);
1902 /* Various complaints about symbol reading that don't abort the process. */
1905 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
1907 complaint (&symfile_complaints
,
1908 _("statement list doesn't fit in .debug_line section"));
1912 dwarf2_debug_line_missing_file_complaint (void)
1914 complaint (&symfile_complaints
,
1915 _(".debug_line section has line data without a file"));
1919 dwarf2_debug_line_missing_end_sequence_complaint (void)
1921 complaint (&symfile_complaints
,
1922 _(".debug_line section has line "
1923 "program sequence without an end"));
1927 dwarf2_complex_location_expr_complaint (void)
1929 complaint (&symfile_complaints
, _("location expression too complex"));
1933 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
1936 complaint (&symfile_complaints
,
1937 _("const value length mismatch for '%s', got %d, expected %d"),
1942 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
1944 complaint (&symfile_complaints
,
1945 _("debug info runs off end of %s section"
1947 get_section_name (section
),
1948 get_section_file_name (section
));
1952 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
1954 complaint (&symfile_complaints
,
1955 _("macro debug info contains a "
1956 "malformed macro definition:\n`%s'"),
1961 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
1963 complaint (&symfile_complaints
,
1964 _("invalid attribute class or form for '%s' in '%s'"),
1968 /* Hash function for line_header_hash. */
1971 line_header_hash (const struct line_header
*ofs
)
1973 return ofs
->offset
.sect_off
^ ofs
->offset_in_dwz
;
1976 /* Hash function for htab_create_alloc_ex for line_header_hash. */
1979 line_header_hash_voidp (const void *item
)
1981 const struct line_header
*ofs
= (const struct line_header
*) item
;
1983 return line_header_hash (ofs
);
1986 /* Equality function for line_header_hash. */
1989 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
1991 const struct line_header
*ofs_lhs
= (const struct line_header
*) item_lhs
;
1992 const struct line_header
*ofs_rhs
= (const struct line_header
*) item_rhs
;
1994 return (ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
1995 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
2001 /* Convert VALUE between big- and little-endian. */
2003 byte_swap (offset_type value
)
2007 result
= (value
& 0xff) << 24;
2008 result
|= (value
& 0xff00) << 8;
2009 result
|= (value
& 0xff0000) >> 8;
2010 result
|= (value
& 0xff000000) >> 24;
2014 #define MAYBE_SWAP(V) byte_swap (V)
2017 #define MAYBE_SWAP(V) (V)
2018 #endif /* WORDS_BIGENDIAN */
2020 /* Read the given attribute value as an address, taking the attribute's
2021 form into account. */
2024 attr_value_as_address (struct attribute
*attr
)
2028 if (attr
->form
!= DW_FORM_addr
&& attr
->form
!= DW_FORM_GNU_addr_index
)
2030 /* Aside from a few clearly defined exceptions, attributes that
2031 contain an address must always be in DW_FORM_addr form.
2032 Unfortunately, some compilers happen to be violating this
2033 requirement by encoding addresses using other forms, such
2034 as DW_FORM_data4 for example. For those broken compilers,
2035 we try to do our best, without any guarantee of success,
2036 to interpret the address correctly. It would also be nice
2037 to generate a complaint, but that would require us to maintain
2038 a list of legitimate cases where a non-address form is allowed,
2039 as well as update callers to pass in at least the CU's DWARF
2040 version. This is more overhead than what we're willing to
2041 expand for a pretty rare case. */
2042 addr
= DW_UNSND (attr
);
2045 addr
= DW_ADDR (attr
);
2050 /* The suffix for an index file. */
2051 #define INDEX_SUFFIX ".gdb-index"
2053 /* Try to locate the sections we need for DWARF 2 debugging
2054 information and return true if we have enough to do something.
2055 NAMES points to the dwarf2 section names, or is NULL if the standard
2056 ELF names are used. */
2059 dwarf2_has_info (struct objfile
*objfile
,
2060 const struct dwarf2_debug_sections
*names
)
2062 dwarf2_per_objfile
= ((struct dwarf2_per_objfile
*)
2063 objfile_data (objfile
, dwarf2_objfile_data_key
));
2064 if (!dwarf2_per_objfile
)
2066 /* Initialize per-objfile state. */
2067 struct dwarf2_per_objfile
*data
2068 = XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_per_objfile
);
2070 memset (data
, 0, sizeof (*data
));
2071 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
2072 dwarf2_per_objfile
= data
;
2074 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
,
2076 dwarf2_per_objfile
->objfile
= objfile
;
2078 return (!dwarf2_per_objfile
->info
.is_virtual
2079 && dwarf2_per_objfile
->info
.s
.section
!= NULL
2080 && !dwarf2_per_objfile
->abbrev
.is_virtual
2081 && dwarf2_per_objfile
->abbrev
.s
.section
!= NULL
);
2084 /* Return the containing section of virtual section SECTION. */
2086 static struct dwarf2_section_info
*
2087 get_containing_section (const struct dwarf2_section_info
*section
)
2089 gdb_assert (section
->is_virtual
);
2090 return section
->s
.containing_section
;
2093 /* Return the bfd owner of SECTION. */
2096 get_section_bfd_owner (const struct dwarf2_section_info
*section
)
2098 if (section
->is_virtual
)
2100 section
= get_containing_section (section
);
2101 gdb_assert (!section
->is_virtual
);
2103 return section
->s
.section
->owner
;
2106 /* Return the bfd section of SECTION.
2107 Returns NULL if the section is not present. */
2110 get_section_bfd_section (const struct dwarf2_section_info
*section
)
2112 if (section
->is_virtual
)
2114 section
= get_containing_section (section
);
2115 gdb_assert (!section
->is_virtual
);
2117 return section
->s
.section
;
2120 /* Return the name of SECTION. */
2123 get_section_name (const struct dwarf2_section_info
*section
)
2125 asection
*sectp
= get_section_bfd_section (section
);
2127 gdb_assert (sectp
!= NULL
);
2128 return bfd_section_name (get_section_bfd_owner (section
), sectp
);
2131 /* Return the name of the file SECTION is in. */
2134 get_section_file_name (const struct dwarf2_section_info
*section
)
2136 bfd
*abfd
= get_section_bfd_owner (section
);
2138 return bfd_get_filename (abfd
);
2141 /* Return the id of SECTION.
2142 Returns 0 if SECTION doesn't exist. */
2145 get_section_id (const struct dwarf2_section_info
*section
)
2147 asection
*sectp
= get_section_bfd_section (section
);
2154 /* Return the flags of SECTION.
2155 SECTION (or containing section if this is a virtual section) must exist. */
2158 get_section_flags (const struct dwarf2_section_info
*section
)
2160 asection
*sectp
= get_section_bfd_section (section
);
2162 gdb_assert (sectp
!= NULL
);
2163 return bfd_get_section_flags (sectp
->owner
, sectp
);
2166 /* When loading sections, we look either for uncompressed section or for
2167 compressed section names. */
2170 section_is_p (const char *section_name
,
2171 const struct dwarf2_section_names
*names
)
2173 if (names
->normal
!= NULL
2174 && strcmp (section_name
, names
->normal
) == 0)
2176 if (names
->compressed
!= NULL
2177 && strcmp (section_name
, names
->compressed
) == 0)
2182 /* This function is mapped across the sections and remembers the
2183 offset and size of each of the debugging sections we are interested
2187 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *vnames
)
2189 const struct dwarf2_debug_sections
*names
;
2190 flagword aflag
= bfd_get_section_flags (abfd
, sectp
);
2193 names
= &dwarf2_elf_names
;
2195 names
= (const struct dwarf2_debug_sections
*) vnames
;
2197 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
2200 else if (section_is_p (sectp
->name
, &names
->info
))
2202 dwarf2_per_objfile
->info
.s
.section
= sectp
;
2203 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
2205 else if (section_is_p (sectp
->name
, &names
->abbrev
))
2207 dwarf2_per_objfile
->abbrev
.s
.section
= sectp
;
2208 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
2210 else if (section_is_p (sectp
->name
, &names
->line
))
2212 dwarf2_per_objfile
->line
.s
.section
= sectp
;
2213 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
2215 else if (section_is_p (sectp
->name
, &names
->loc
))
2217 dwarf2_per_objfile
->loc
.s
.section
= sectp
;
2218 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
2220 else if (section_is_p (sectp
->name
, &names
->macinfo
))
2222 dwarf2_per_objfile
->macinfo
.s
.section
= sectp
;
2223 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
2225 else if (section_is_p (sectp
->name
, &names
->macro
))
2227 dwarf2_per_objfile
->macro
.s
.section
= sectp
;
2228 dwarf2_per_objfile
->macro
.size
= bfd_get_section_size (sectp
);
2230 else if (section_is_p (sectp
->name
, &names
->str
))
2232 dwarf2_per_objfile
->str
.s
.section
= sectp
;
2233 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
2235 else if (section_is_p (sectp
->name
, &names
->addr
))
2237 dwarf2_per_objfile
->addr
.s
.section
= sectp
;
2238 dwarf2_per_objfile
->addr
.size
= bfd_get_section_size (sectp
);
2240 else if (section_is_p (sectp
->name
, &names
->frame
))
2242 dwarf2_per_objfile
->frame
.s
.section
= sectp
;
2243 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
2245 else if (section_is_p (sectp
->name
, &names
->eh_frame
))
2247 dwarf2_per_objfile
->eh_frame
.s
.section
= sectp
;
2248 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
2250 else if (section_is_p (sectp
->name
, &names
->ranges
))
2252 dwarf2_per_objfile
->ranges
.s
.section
= sectp
;
2253 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
2255 else if (section_is_p (sectp
->name
, &names
->types
))
2257 struct dwarf2_section_info type_section
;
2259 memset (&type_section
, 0, sizeof (type_section
));
2260 type_section
.s
.section
= sectp
;
2261 type_section
.size
= bfd_get_section_size (sectp
);
2263 VEC_safe_push (dwarf2_section_info_def
, dwarf2_per_objfile
->types
,
2266 else if (section_is_p (sectp
->name
, &names
->gdb_index
))
2268 dwarf2_per_objfile
->gdb_index
.s
.section
= sectp
;
2269 dwarf2_per_objfile
->gdb_index
.size
= bfd_get_section_size (sectp
);
2272 if ((bfd_get_section_flags (abfd
, sectp
) & (SEC_LOAD
| SEC_ALLOC
))
2273 && bfd_section_vma (abfd
, sectp
) == 0)
2274 dwarf2_per_objfile
->has_section_at_zero
= 1;
2277 /* A helper function that decides whether a section is empty,
2281 dwarf2_section_empty_p (const struct dwarf2_section_info
*section
)
2283 if (section
->is_virtual
)
2284 return section
->size
== 0;
2285 return section
->s
.section
== NULL
|| section
->size
== 0;
2288 /* Read the contents of the section INFO.
2289 OBJFILE is the main object file, but not necessarily the file where
2290 the section comes from. E.g., for DWO files the bfd of INFO is the bfd
2292 If the section is compressed, uncompress it before returning. */
2295 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
2299 gdb_byte
*buf
, *retbuf
;
2303 info
->buffer
= NULL
;
2306 if (dwarf2_section_empty_p (info
))
2309 sectp
= get_section_bfd_section (info
);
2311 /* If this is a virtual section we need to read in the real one first. */
2312 if (info
->is_virtual
)
2314 struct dwarf2_section_info
*containing_section
=
2315 get_containing_section (info
);
2317 gdb_assert (sectp
!= NULL
);
2318 if ((sectp
->flags
& SEC_RELOC
) != 0)
2320 error (_("Dwarf Error: DWP format V2 with relocations is not"
2321 " supported in section %s [in module %s]"),
2322 get_section_name (info
), get_section_file_name (info
));
2324 dwarf2_read_section (objfile
, containing_section
);
2325 /* Other code should have already caught virtual sections that don't
2327 gdb_assert (info
->virtual_offset
+ info
->size
2328 <= containing_section
->size
);
2329 /* If the real section is empty or there was a problem reading the
2330 section we shouldn't get here. */
2331 gdb_assert (containing_section
->buffer
!= NULL
);
2332 info
->buffer
= containing_section
->buffer
+ info
->virtual_offset
;
2336 /* If the section has relocations, we must read it ourselves.
2337 Otherwise we attach it to the BFD. */
2338 if ((sectp
->flags
& SEC_RELOC
) == 0)
2340 info
->buffer
= gdb_bfd_map_section (sectp
, &info
->size
);
2344 buf
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
2347 /* When debugging .o files, we may need to apply relocations; see
2348 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
2349 We never compress sections in .o files, so we only need to
2350 try this when the section is not compressed. */
2351 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
2354 info
->buffer
= retbuf
;
2358 abfd
= get_section_bfd_owner (info
);
2359 gdb_assert (abfd
!= NULL
);
2361 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
2362 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
2364 error (_("Dwarf Error: Can't read DWARF data"
2365 " in section %s [in module %s]"),
2366 bfd_section_name (abfd
, sectp
), bfd_get_filename (abfd
));
2370 /* A helper function that returns the size of a section in a safe way.
2371 If you are positive that the section has been read before using the
2372 size, then it is safe to refer to the dwarf2_section_info object's
2373 "size" field directly. In other cases, you must call this
2374 function, because for compressed sections the size field is not set
2375 correctly until the section has been read. */
2377 static bfd_size_type
2378 dwarf2_section_size (struct objfile
*objfile
,
2379 struct dwarf2_section_info
*info
)
2382 dwarf2_read_section (objfile
, info
);
2386 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2390 dwarf2_get_section_info (struct objfile
*objfile
,
2391 enum dwarf2_section_enum sect
,
2392 asection
**sectp
, const gdb_byte
**bufp
,
2393 bfd_size_type
*sizep
)
2395 struct dwarf2_per_objfile
*data
2396 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
2397 dwarf2_objfile_data_key
);
2398 struct dwarf2_section_info
*info
;
2400 /* We may see an objfile without any DWARF, in which case we just
2411 case DWARF2_DEBUG_FRAME
:
2412 info
= &data
->frame
;
2414 case DWARF2_EH_FRAME
:
2415 info
= &data
->eh_frame
;
2418 gdb_assert_not_reached ("unexpected section");
2421 dwarf2_read_section (objfile
, info
);
2423 *sectp
= get_section_bfd_section (info
);
2424 *bufp
= info
->buffer
;
2425 *sizep
= info
->size
;
2428 /* A helper function to find the sections for a .dwz file. */
2431 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2433 struct dwz_file
*dwz_file
= (struct dwz_file
*) arg
;
2435 /* Note that we only support the standard ELF names, because .dwz
2436 is ELF-only (at the time of writing). */
2437 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2439 dwz_file
->abbrev
.s
.section
= sectp
;
2440 dwz_file
->abbrev
.size
= bfd_get_section_size (sectp
);
2442 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2444 dwz_file
->info
.s
.section
= sectp
;
2445 dwz_file
->info
.size
= bfd_get_section_size (sectp
);
2447 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2449 dwz_file
->str
.s
.section
= sectp
;
2450 dwz_file
->str
.size
= bfd_get_section_size (sectp
);
2452 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2454 dwz_file
->line
.s
.section
= sectp
;
2455 dwz_file
->line
.size
= bfd_get_section_size (sectp
);
2457 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2459 dwz_file
->macro
.s
.section
= sectp
;
2460 dwz_file
->macro
.size
= bfd_get_section_size (sectp
);
2462 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2464 dwz_file
->gdb_index
.s
.section
= sectp
;
2465 dwz_file
->gdb_index
.size
= bfd_get_section_size (sectp
);
2469 /* Open the separate '.dwz' debug file, if needed. Return NULL if
2470 there is no .gnu_debugaltlink section in the file. Error if there
2471 is such a section but the file cannot be found. */
2473 static struct dwz_file
*
2474 dwarf2_get_dwz_file (void)
2478 struct cleanup
*cleanup
;
2479 const char *filename
;
2480 struct dwz_file
*result
;
2481 bfd_size_type buildid_len_arg
;
2485 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2486 return dwarf2_per_objfile
->dwz_file
;
2488 bfd_set_error (bfd_error_no_error
);
2489 data
= bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2490 &buildid_len_arg
, &buildid
);
2493 if (bfd_get_error () == bfd_error_no_error
)
2495 error (_("could not read '.gnu_debugaltlink' section: %s"),
2496 bfd_errmsg (bfd_get_error ()));
2498 cleanup
= make_cleanup (xfree
, data
);
2499 make_cleanup (xfree
, buildid
);
2501 buildid_len
= (size_t) buildid_len_arg
;
2503 filename
= (const char *) data
;
2504 if (!IS_ABSOLUTE_PATH (filename
))
2506 char *abs
= gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2509 make_cleanup (xfree
, abs
);
2510 abs
= ldirname (abs
);
2511 make_cleanup (xfree
, abs
);
2513 rel
= concat (abs
, SLASH_STRING
, filename
, (char *) NULL
);
2514 make_cleanup (xfree
, rel
);
2518 /* First try the file name given in the section. If that doesn't
2519 work, try to use the build-id instead. */
2520 dwz_bfd
= gdb_bfd_open (filename
, gnutarget
, -1);
2521 if (dwz_bfd
!= NULL
)
2523 if (!build_id_verify (dwz_bfd
, buildid_len
, buildid
))
2525 gdb_bfd_unref (dwz_bfd
);
2530 if (dwz_bfd
== NULL
)
2531 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2533 if (dwz_bfd
== NULL
)
2534 error (_("could not find '.gnu_debugaltlink' file for %s"),
2535 objfile_name (dwarf2_per_objfile
->objfile
));
2537 result
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
2539 result
->dwz_bfd
= dwz_bfd
;
2541 bfd_map_over_sections (dwz_bfd
, locate_dwz_sections
, result
);
2543 do_cleanups (cleanup
);
2545 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, dwz_bfd
);
2546 dwarf2_per_objfile
->dwz_file
= result
;
2550 /* DWARF quick_symbols_functions support. */
2552 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2553 unique line tables, so we maintain a separate table of all .debug_line
2554 derived entries to support the sharing.
2555 All the quick functions need is the list of file names. We discard the
2556 line_header when we're done and don't need to record it here. */
2557 struct quick_file_names
2559 /* The data used to construct the hash key. */
2560 struct stmt_list_hash hash
;
2562 /* The number of entries in file_names, real_names. */
2563 unsigned int num_file_names
;
2565 /* The file names from the line table, after being run through
2567 const char **file_names
;
2569 /* The file names from the line table after being run through
2570 gdb_realpath. These are computed lazily. */
2571 const char **real_names
;
2574 /* When using the index (and thus not using psymtabs), each CU has an
2575 object of this type. This is used to hold information needed by
2576 the various "quick" methods. */
2577 struct dwarf2_per_cu_quick_data
2579 /* The file table. This can be NULL if there was no file table
2580 or it's currently not read in.
2581 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2582 struct quick_file_names
*file_names
;
2584 /* The corresponding symbol table. This is NULL if symbols for this
2585 CU have not yet been read. */
2586 struct compunit_symtab
*compunit_symtab
;
2588 /* A temporary mark bit used when iterating over all CUs in
2589 expand_symtabs_matching. */
2590 unsigned int mark
: 1;
2592 /* True if we've tried to read the file table and found there isn't one.
2593 There will be no point in trying to read it again next time. */
2594 unsigned int no_file_data
: 1;
2597 /* Utility hash function for a stmt_list_hash. */
2600 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2604 if (stmt_list_hash
->dwo_unit
!= NULL
)
2605 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2606 v
+= stmt_list_hash
->line_offset
.sect_off
;
2610 /* Utility equality function for a stmt_list_hash. */
2613 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2614 const struct stmt_list_hash
*rhs
)
2616 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2618 if (lhs
->dwo_unit
!= NULL
2619 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2622 return lhs
->line_offset
.sect_off
== rhs
->line_offset
.sect_off
;
2625 /* Hash function for a quick_file_names. */
2628 hash_file_name_entry (const void *e
)
2630 const struct quick_file_names
*file_data
2631 = (const struct quick_file_names
*) e
;
2633 return hash_stmt_list_entry (&file_data
->hash
);
2636 /* Equality function for a quick_file_names. */
2639 eq_file_name_entry (const void *a
, const void *b
)
2641 const struct quick_file_names
*ea
= (const struct quick_file_names
*) a
;
2642 const struct quick_file_names
*eb
= (const struct quick_file_names
*) b
;
2644 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2647 /* Delete function for a quick_file_names. */
2650 delete_file_name_entry (void *e
)
2652 struct quick_file_names
*file_data
= (struct quick_file_names
*) e
;
2655 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2657 xfree ((void*) file_data
->file_names
[i
]);
2658 if (file_data
->real_names
)
2659 xfree ((void*) file_data
->real_names
[i
]);
2662 /* The space for the struct itself lives on objfile_obstack,
2663 so we don't free it here. */
2666 /* Create a quick_file_names hash table. */
2669 create_quick_file_names_table (unsigned int nr_initial_entries
)
2671 return htab_create_alloc (nr_initial_entries
,
2672 hash_file_name_entry
, eq_file_name_entry
,
2673 delete_file_name_entry
, xcalloc
, xfree
);
2676 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2677 have to be created afterwards. You should call age_cached_comp_units after
2678 processing PER_CU->CU. dw2_setup must have been already called. */
2681 load_cu (struct dwarf2_per_cu_data
*per_cu
)
2683 if (per_cu
->is_debug_types
)
2684 load_full_type_unit (per_cu
);
2686 load_full_comp_unit (per_cu
, language_minimal
);
2688 if (per_cu
->cu
== NULL
)
2689 return; /* Dummy CU. */
2691 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2694 /* Read in the symbols for PER_CU. */
2697 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2699 struct cleanup
*back_to
;
2701 /* Skip type_unit_groups, reading the type units they contain
2702 is handled elsewhere. */
2703 if (IS_TYPE_UNIT_GROUP (per_cu
))
2706 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
2708 if (dwarf2_per_objfile
->using_index
2709 ? per_cu
->v
.quick
->compunit_symtab
== NULL
2710 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2712 queue_comp_unit (per_cu
, language_minimal
);
2715 /* If we just loaded a CU from a DWO, and we're working with an index
2716 that may badly handle TUs, load all the TUs in that DWO as well.
2717 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2718 if (!per_cu
->is_debug_types
2719 && per_cu
->cu
!= NULL
2720 && per_cu
->cu
->dwo_unit
!= NULL
2721 && dwarf2_per_objfile
->index_table
!= NULL
2722 && dwarf2_per_objfile
->index_table
->version
<= 7
2723 /* DWP files aren't supported yet. */
2724 && get_dwp_file () == NULL
)
2725 queue_and_load_all_dwo_tus (per_cu
);
2730 /* Age the cache, releasing compilation units that have not
2731 been used recently. */
2732 age_cached_comp_units ();
2734 do_cleanups (back_to
);
2737 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2738 the objfile from which this CU came. Returns the resulting symbol
2741 static struct compunit_symtab
*
2742 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2744 gdb_assert (dwarf2_per_objfile
->using_index
);
2745 if (!per_cu
->v
.quick
->compunit_symtab
)
2747 struct cleanup
*back_to
= make_cleanup (free_cached_comp_units
, NULL
);
2748 increment_reading_symtab ();
2749 dw2_do_instantiate_symtab (per_cu
);
2750 process_cu_includes ();
2751 do_cleanups (back_to
);
2754 return per_cu
->v
.quick
->compunit_symtab
;
2757 /* Return the CU/TU given its index.
2759 This is intended for loops like:
2761 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2762 + dwarf2_per_objfile->n_type_units); ++i)
2764 struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i);
2770 static struct dwarf2_per_cu_data
*
2771 dw2_get_cutu (int index
)
2773 if (index
>= dwarf2_per_objfile
->n_comp_units
)
2775 index
-= dwarf2_per_objfile
->n_comp_units
;
2776 gdb_assert (index
< dwarf2_per_objfile
->n_type_units
);
2777 return &dwarf2_per_objfile
->all_type_units
[index
]->per_cu
;
2780 return dwarf2_per_objfile
->all_comp_units
[index
];
2783 /* Return the CU given its index.
2784 This differs from dw2_get_cutu in that it's for when you know INDEX
2787 static struct dwarf2_per_cu_data
*
2788 dw2_get_cu (int index
)
2790 gdb_assert (index
>= 0 && index
< dwarf2_per_objfile
->n_comp_units
);
2792 return dwarf2_per_objfile
->all_comp_units
[index
];
2795 /* A helper for create_cus_from_index that handles a given list of
2799 create_cus_from_index_list (struct objfile
*objfile
,
2800 const gdb_byte
*cu_list
, offset_type n_elements
,
2801 struct dwarf2_section_info
*section
,
2807 for (i
= 0; i
< n_elements
; i
+= 2)
2809 struct dwarf2_per_cu_data
*the_cu
;
2810 ULONGEST offset
, length
;
2812 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2813 offset
= extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2814 length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2817 the_cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2818 struct dwarf2_per_cu_data
);
2819 the_cu
->offset
.sect_off
= offset
;
2820 the_cu
->length
= length
;
2821 the_cu
->objfile
= objfile
;
2822 the_cu
->section
= section
;
2823 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2824 struct dwarf2_per_cu_quick_data
);
2825 the_cu
->is_dwz
= is_dwz
;
2826 dwarf2_per_objfile
->all_comp_units
[base_offset
+ i
/ 2] = the_cu
;
2830 /* Read the CU list from the mapped index, and use it to create all
2831 the CU objects for this objfile. */
2834 create_cus_from_index (struct objfile
*objfile
,
2835 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
2836 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
2838 struct dwz_file
*dwz
;
2840 dwarf2_per_objfile
->n_comp_units
= (cu_list_elements
+ dwz_elements
) / 2;
2841 dwarf2_per_objfile
->all_comp_units
=
2842 XOBNEWVEC (&objfile
->objfile_obstack
, struct dwarf2_per_cu_data
*,
2843 dwarf2_per_objfile
->n_comp_units
);
2845 create_cus_from_index_list (objfile
, cu_list
, cu_list_elements
,
2846 &dwarf2_per_objfile
->info
, 0, 0);
2848 if (dwz_elements
== 0)
2851 dwz
= dwarf2_get_dwz_file ();
2852 create_cus_from_index_list (objfile
, dwz_list
, dwz_elements
, &dwz
->info
, 1,
2853 cu_list_elements
/ 2);
2856 /* Create the signatured type hash table from the index. */
2859 create_signatured_type_table_from_index (struct objfile
*objfile
,
2860 struct dwarf2_section_info
*section
,
2861 const gdb_byte
*bytes
,
2862 offset_type elements
)
2865 htab_t sig_types_hash
;
2867 dwarf2_per_objfile
->n_type_units
2868 = dwarf2_per_objfile
->n_allocated_type_units
2870 dwarf2_per_objfile
->all_type_units
=
2871 XNEWVEC (struct signatured_type
*, dwarf2_per_objfile
->n_type_units
);
2873 sig_types_hash
= allocate_signatured_type_table (objfile
);
2875 for (i
= 0; i
< elements
; i
+= 3)
2877 struct signatured_type
*sig_type
;
2878 ULONGEST offset
, type_offset_in_tu
, signature
;
2881 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2882 offset
= extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
2883 type_offset_in_tu
= extract_unsigned_integer (bytes
+ 8, 8,
2885 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
2888 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2889 struct signatured_type
);
2890 sig_type
->signature
= signature
;
2891 sig_type
->type_offset_in_tu
.cu_off
= type_offset_in_tu
;
2892 sig_type
->per_cu
.is_debug_types
= 1;
2893 sig_type
->per_cu
.section
= section
;
2894 sig_type
->per_cu
.offset
.sect_off
= offset
;
2895 sig_type
->per_cu
.objfile
= objfile
;
2896 sig_type
->per_cu
.v
.quick
2897 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2898 struct dwarf2_per_cu_quick_data
);
2900 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
2903 dwarf2_per_objfile
->all_type_units
[i
/ 3] = sig_type
;
2906 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
2909 /* Read the address map data from the mapped index, and use it to
2910 populate the objfile's psymtabs_addrmap. */
2913 create_addrmap_from_index (struct objfile
*objfile
, struct mapped_index
*index
)
2915 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2916 const gdb_byte
*iter
, *end
;
2917 struct obstack temp_obstack
;
2918 struct addrmap
*mutable_map
;
2919 struct cleanup
*cleanup
;
2922 obstack_init (&temp_obstack
);
2923 cleanup
= make_cleanup_obstack_free (&temp_obstack
);
2924 mutable_map
= addrmap_create_mutable (&temp_obstack
);
2926 iter
= index
->address_table
;
2927 end
= iter
+ index
->address_table_size
;
2929 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2933 ULONGEST hi
, lo
, cu_index
;
2934 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2936 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2938 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
2943 complaint (&symfile_complaints
,
2944 _(".gdb_index address table has invalid range (%s - %s)"),
2945 hex_string (lo
), hex_string (hi
));
2949 if (cu_index
>= dwarf2_per_objfile
->n_comp_units
)
2951 complaint (&symfile_complaints
,
2952 _(".gdb_index address table has invalid CU number %u"),
2953 (unsigned) cu_index
);
2957 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
);
2958 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
);
2959 addrmap_set_empty (mutable_map
, lo
, hi
- 1, dw2_get_cutu (cu_index
));
2962 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
2963 &objfile
->objfile_obstack
);
2964 do_cleanups (cleanup
);
2967 /* The hash function for strings in the mapped index. This is the same as
2968 SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the
2969 implementation. This is necessary because the hash function is tied to the
2970 format of the mapped index file. The hash values do not have to match with
2973 Use INT_MAX for INDEX_VERSION if you generate the current index format. */
2976 mapped_index_string_hash (int index_version
, const void *p
)
2978 const unsigned char *str
= (const unsigned char *) p
;
2982 while ((c
= *str
++) != 0)
2984 if (index_version
>= 5)
2986 r
= r
* 67 + c
- 113;
2992 /* Find a slot in the mapped index INDEX for the object named NAME.
2993 If NAME is found, set *VEC_OUT to point to the CU vector in the
2994 constant pool and return 1. If NAME cannot be found, return 0. */
2997 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
2998 offset_type
**vec_out
)
3000 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
3002 offset_type slot
, step
;
3003 int (*cmp
) (const char *, const char *);
3005 if (current_language
->la_language
== language_cplus
3006 || current_language
->la_language
== language_java
3007 || current_language
->la_language
== language_fortran
3008 || current_language
->la_language
== language_d
)
3010 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
3013 if (strchr (name
, '(') != NULL
)
3015 char *without_params
= cp_remove_params (name
);
3017 if (without_params
!= NULL
)
3019 make_cleanup (xfree
, without_params
);
3020 name
= without_params
;
3025 /* Index version 4 did not support case insensitive searches. But the
3026 indices for case insensitive languages are built in lowercase, therefore
3027 simulate our NAME being searched is also lowercased. */
3028 hash
= mapped_index_string_hash ((index
->version
== 4
3029 && case_sensitivity
== case_sensitive_off
3030 ? 5 : index
->version
),
3033 slot
= hash
& (index
->symbol_table_slots
- 1);
3034 step
= ((hash
* 17) & (index
->symbol_table_slots
- 1)) | 1;
3035 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
3039 /* Convert a slot number to an offset into the table. */
3040 offset_type i
= 2 * slot
;
3042 if (index
->symbol_table
[i
] == 0 && index
->symbol_table
[i
+ 1] == 0)
3044 do_cleanups (back_to
);
3048 str
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[i
]);
3049 if (!cmp (name
, str
))
3051 *vec_out
= (offset_type
*) (index
->constant_pool
3052 + MAYBE_SWAP (index
->symbol_table
[i
+ 1]));
3053 do_cleanups (back_to
);
3057 slot
= (slot
+ step
) & (index
->symbol_table_slots
- 1);
3061 /* A helper function that reads the .gdb_index from SECTION and fills
3062 in MAP. FILENAME is the name of the file containing the section;
3063 it is used for error reporting. DEPRECATED_OK is nonzero if it is
3064 ok to use deprecated sections.
3066 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
3067 out parameters that are filled in with information about the CU and
3068 TU lists in the section.
3070 Returns 1 if all went well, 0 otherwise. */
3073 read_index_from_section (struct objfile
*objfile
,
3074 const char *filename
,
3076 struct dwarf2_section_info
*section
,
3077 struct mapped_index
*map
,
3078 const gdb_byte
**cu_list
,
3079 offset_type
*cu_list_elements
,
3080 const gdb_byte
**types_list
,
3081 offset_type
*types_list_elements
)
3083 const gdb_byte
*addr
;
3084 offset_type version
;
3085 offset_type
*metadata
;
3088 if (dwarf2_section_empty_p (section
))
3091 /* Older elfutils strip versions could keep the section in the main
3092 executable while splitting it for the separate debug info file. */
3093 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
3096 dwarf2_read_section (objfile
, section
);
3098 addr
= section
->buffer
;
3099 /* Version check. */
3100 version
= MAYBE_SWAP (*(offset_type
*) addr
);
3101 /* Versions earlier than 3 emitted every copy of a psymbol. This
3102 causes the index to behave very poorly for certain requests. Version 3
3103 contained incomplete addrmap. So, it seems better to just ignore such
3107 static int warning_printed
= 0;
3108 if (!warning_printed
)
3110 warning (_("Skipping obsolete .gdb_index section in %s."),
3112 warning_printed
= 1;
3116 /* Index version 4 uses a different hash function than index version
3119 Versions earlier than 6 did not emit psymbols for inlined
3120 functions. Using these files will cause GDB not to be able to
3121 set breakpoints on inlined functions by name, so we ignore these
3122 indices unless the user has done
3123 "set use-deprecated-index-sections on". */
3124 if (version
< 6 && !deprecated_ok
)
3126 static int warning_printed
= 0;
3127 if (!warning_printed
)
3130 Skipping deprecated .gdb_index section in %s.\n\
3131 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3132 to use the section anyway."),
3134 warning_printed
= 1;
3138 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3139 of the TU (for symbols coming from TUs),
3140 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3141 Plus gold-generated indices can have duplicate entries for global symbols,
3142 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3143 These are just performance bugs, and we can't distinguish gdb-generated
3144 indices from gold-generated ones, so issue no warning here. */
3146 /* Indexes with higher version than the one supported by GDB may be no
3147 longer backward compatible. */
3151 map
->version
= version
;
3152 map
->total_size
= section
->size
;
3154 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3157 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3158 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3162 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3163 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3164 - MAYBE_SWAP (metadata
[i
]))
3168 map
->address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3169 map
->address_table_size
= (MAYBE_SWAP (metadata
[i
+ 1])
3170 - MAYBE_SWAP (metadata
[i
]));
3173 map
->symbol_table
= (offset_type
*) (addr
+ MAYBE_SWAP (metadata
[i
]));
3174 map
->symbol_table_slots
= ((MAYBE_SWAP (metadata
[i
+ 1])
3175 - MAYBE_SWAP (metadata
[i
]))
3176 / (2 * sizeof (offset_type
)));
3179 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3185 /* Read the index file. If everything went ok, initialize the "quick"
3186 elements of all the CUs and return 1. Otherwise, return 0. */
3189 dwarf2_read_index (struct objfile
*objfile
)
3191 struct mapped_index local_map
, *map
;
3192 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3193 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3194 struct dwz_file
*dwz
;
3196 if (!read_index_from_section (objfile
, objfile_name (objfile
),
3197 use_deprecated_index_sections
,
3198 &dwarf2_per_objfile
->gdb_index
, &local_map
,
3199 &cu_list
, &cu_list_elements
,
3200 &types_list
, &types_list_elements
))
3203 /* Don't use the index if it's empty. */
3204 if (local_map
.symbol_table_slots
== 0)
3207 /* If there is a .dwz file, read it so we can get its CU list as
3209 dwz
= dwarf2_get_dwz_file ();
3212 struct mapped_index dwz_map
;
3213 const gdb_byte
*dwz_types_ignore
;
3214 offset_type dwz_types_elements_ignore
;
3216 if (!read_index_from_section (objfile
, bfd_get_filename (dwz
->dwz_bfd
),
3218 &dwz
->gdb_index
, &dwz_map
,
3219 &dwz_list
, &dwz_list_elements
,
3221 &dwz_types_elements_ignore
))
3223 warning (_("could not read '.gdb_index' section from %s; skipping"),
3224 bfd_get_filename (dwz
->dwz_bfd
));
3229 create_cus_from_index (objfile
, cu_list
, cu_list_elements
, dwz_list
,
3232 if (types_list_elements
)
3234 struct dwarf2_section_info
*section
;
3236 /* We can only handle a single .debug_types when we have an
3238 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
3241 section
= VEC_index (dwarf2_section_info_def
,
3242 dwarf2_per_objfile
->types
, 0);
3244 create_signatured_type_table_from_index (objfile
, section
, types_list
,
3245 types_list_elements
);
3248 create_addrmap_from_index (objfile
, &local_map
);
3250 map
= XOBNEW (&objfile
->objfile_obstack
, struct mapped_index
);
3253 dwarf2_per_objfile
->index_table
= map
;
3254 dwarf2_per_objfile
->using_index
= 1;
3255 dwarf2_per_objfile
->quick_file_names_table
=
3256 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
3261 /* A helper for the "quick" functions which sets the global
3262 dwarf2_per_objfile according to OBJFILE. */
3265 dw2_setup (struct objfile
*objfile
)
3267 dwarf2_per_objfile
= ((struct dwarf2_per_objfile
*)
3268 objfile_data (objfile
, dwarf2_objfile_data_key
));
3269 gdb_assert (dwarf2_per_objfile
);
3272 /* die_reader_func for dw2_get_file_names. */
3275 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3276 const gdb_byte
*info_ptr
,
3277 struct die_info
*comp_unit_die
,
3281 struct dwarf2_cu
*cu
= reader
->cu
;
3282 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3283 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3284 struct dwarf2_per_cu_data
*lh_cu
;
3285 struct line_header
*lh
;
3286 struct attribute
*attr
;
3288 const char *name
, *comp_dir
;
3290 struct quick_file_names
*qfn
;
3291 unsigned int line_offset
;
3293 gdb_assert (! this_cu
->is_debug_types
);
3295 /* Our callers never want to match partial units -- instead they
3296 will match the enclosing full CU. */
3297 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3299 this_cu
->v
.quick
->no_file_data
= 1;
3308 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3311 struct quick_file_names find_entry
;
3313 line_offset
= DW_UNSND (attr
);
3315 /* We may have already read in this line header (TU line header sharing).
3316 If we have we're done. */
3317 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3318 find_entry
.hash
.line_offset
.sect_off
= line_offset
;
3319 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
3320 &find_entry
, INSERT
);
3323 lh_cu
->v
.quick
->file_names
= (struct quick_file_names
*) *slot
;
3327 lh
= dwarf_decode_line_header (line_offset
, cu
);
3331 lh_cu
->v
.quick
->no_file_data
= 1;
3335 qfn
= XOBNEW (&objfile
->objfile_obstack
, struct quick_file_names
);
3336 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3337 qfn
->hash
.line_offset
.sect_off
= line_offset
;
3338 gdb_assert (slot
!= NULL
);
3341 find_file_and_directory (comp_unit_die
, cu
, &name
, &comp_dir
);
3343 qfn
->num_file_names
= lh
->num_file_names
;
3345 XOBNEWVEC (&objfile
->objfile_obstack
, const char *, lh
->num_file_names
);
3346 for (i
= 0; i
< lh
->num_file_names
; ++i
)
3347 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
, comp_dir
);
3348 qfn
->real_names
= NULL
;
3350 free_line_header (lh
);
3352 lh_cu
->v
.quick
->file_names
= qfn
;
3355 /* A helper for the "quick" functions which attempts to read the line
3356 table for THIS_CU. */
3358 static struct quick_file_names
*
3359 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3361 /* This should never be called for TUs. */
3362 gdb_assert (! this_cu
->is_debug_types
);
3363 /* Nor type unit groups. */
3364 gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu
));
3366 if (this_cu
->v
.quick
->file_names
!= NULL
)
3367 return this_cu
->v
.quick
->file_names
;
3368 /* If we know there is no line data, no point in looking again. */
3369 if (this_cu
->v
.quick
->no_file_data
)
3372 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
3374 if (this_cu
->v
.quick
->no_file_data
)
3376 return this_cu
->v
.quick
->file_names
;
3379 /* A helper for the "quick" functions which computes and caches the
3380 real path for a given file name from the line table. */
3383 dw2_get_real_path (struct objfile
*objfile
,
3384 struct quick_file_names
*qfn
, int index
)
3386 if (qfn
->real_names
== NULL
)
3387 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
3388 qfn
->num_file_names
, const char *);
3390 if (qfn
->real_names
[index
] == NULL
)
3391 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]);
3393 return qfn
->real_names
[index
];
3396 static struct symtab
*
3397 dw2_find_last_source_symtab (struct objfile
*objfile
)
3399 struct compunit_symtab
*cust
;
3402 dw2_setup (objfile
);
3403 index
= dwarf2_per_objfile
->n_comp_units
- 1;
3404 cust
= dw2_instantiate_symtab (dw2_get_cutu (index
));
3407 return compunit_primary_filetab (cust
);
3410 /* Traversal function for dw2_forget_cached_source_info. */
3413 dw2_free_cached_file_names (void **slot
, void *info
)
3415 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3417 if (file_data
->real_names
)
3421 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3423 xfree ((void*) file_data
->real_names
[i
]);
3424 file_data
->real_names
[i
] = NULL
;
3432 dw2_forget_cached_source_info (struct objfile
*objfile
)
3434 dw2_setup (objfile
);
3436 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
3437 dw2_free_cached_file_names
, NULL
);
3440 /* Helper function for dw2_map_symtabs_matching_filename that expands
3441 the symtabs and calls the iterator. */
3444 dw2_map_expand_apply (struct objfile
*objfile
,
3445 struct dwarf2_per_cu_data
*per_cu
,
3446 const char *name
, const char *real_path
,
3447 int (*callback
) (struct symtab
*, void *),
3450 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3452 /* Don't visit already-expanded CUs. */
3453 if (per_cu
->v
.quick
->compunit_symtab
)
3456 /* This may expand more than one symtab, and we want to iterate over
3458 dw2_instantiate_symtab (per_cu
);
3460 return iterate_over_some_symtabs (name
, real_path
, callback
, data
,
3461 objfile
->compunit_symtabs
, last_made
);
3464 /* Implementation of the map_symtabs_matching_filename method. */
3467 dw2_map_symtabs_matching_filename (struct objfile
*objfile
, const char *name
,
3468 const char *real_path
,
3469 int (*callback
) (struct symtab
*, void *),
3473 const char *name_basename
= lbasename (name
);
3475 dw2_setup (objfile
);
3477 /* The rule is CUs specify all the files, including those used by
3478 any TU, so there's no need to scan TUs here. */
3480 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3483 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3484 struct quick_file_names
*file_data
;
3486 /* We only need to look at symtabs not already expanded. */
3487 if (per_cu
->v
.quick
->compunit_symtab
)
3490 file_data
= dw2_get_file_names (per_cu
);
3491 if (file_data
== NULL
)
3494 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3496 const char *this_name
= file_data
->file_names
[j
];
3497 const char *this_real_name
;
3499 if (compare_filenames_for_search (this_name
, name
))
3501 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3507 /* Before we invoke realpath, which can get expensive when many
3508 files are involved, do a quick comparison of the basenames. */
3509 if (! basenames_may_differ
3510 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3513 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3514 if (compare_filenames_for_search (this_real_name
, name
))
3516 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3522 if (real_path
!= NULL
)
3524 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3525 gdb_assert (IS_ABSOLUTE_PATH (name
));
3526 if (this_real_name
!= NULL
3527 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3529 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3541 /* Struct used to manage iterating over all CUs looking for a symbol. */
3543 struct dw2_symtab_iterator
3545 /* The internalized form of .gdb_index. */
3546 struct mapped_index
*index
;
3547 /* If non-zero, only look for symbols that match BLOCK_INDEX. */
3548 int want_specific_block
;
3549 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
3550 Unused if !WANT_SPECIFIC_BLOCK. */
3552 /* The kind of symbol we're looking for. */
3554 /* The list of CUs from the index entry of the symbol,
3555 or NULL if not found. */
3557 /* The next element in VEC to look at. */
3559 /* The number of elements in VEC, or zero if there is no match. */
3561 /* Have we seen a global version of the symbol?
3562 If so we can ignore all further global instances.
3563 This is to work around gold/15646, inefficient gold-generated
3568 /* Initialize the index symtab iterator ITER.
3569 If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols
3570 in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
3573 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3574 struct mapped_index
*index
,
3575 int want_specific_block
,
3580 iter
->index
= index
;
3581 iter
->want_specific_block
= want_specific_block
;
3582 iter
->block_index
= block_index
;
3583 iter
->domain
= domain
;
3585 iter
->global_seen
= 0;
3587 if (find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3588 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3596 /* Return the next matching CU or NULL if there are no more. */
3598 static struct dwarf2_per_cu_data
*
3599 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3601 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3603 offset_type cu_index_and_attrs
=
3604 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3605 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3606 struct dwarf2_per_cu_data
*per_cu
;
3607 int want_static
= iter
->block_index
!= GLOBAL_BLOCK
;
3608 /* This value is only valid for index versions >= 7. */
3609 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3610 gdb_index_symbol_kind symbol_kind
=
3611 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3612 /* Only check the symbol attributes if they're present.
3613 Indices prior to version 7 don't record them,
3614 and indices >= 7 may elide them for certain symbols
3615 (gold does this). */
3617 (iter
->index
->version
>= 7
3618 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3620 /* Don't crash on bad data. */
3621 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
3622 + dwarf2_per_objfile
->n_type_units
))
3624 complaint (&symfile_complaints
,
3625 _(".gdb_index entry has bad CU index"
3627 objfile_name (dwarf2_per_objfile
->objfile
));
3631 per_cu
= dw2_get_cutu (cu_index
);
3633 /* Skip if already read in. */
3634 if (per_cu
->v
.quick
->compunit_symtab
)
3637 /* Check static vs global. */
3640 if (iter
->want_specific_block
3641 && want_static
!= is_static
)
3643 /* Work around gold/15646. */
3644 if (!is_static
&& iter
->global_seen
)
3647 iter
->global_seen
= 1;
3650 /* Only check the symbol's kind if it has one. */
3653 switch (iter
->domain
)
3656 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3657 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3658 /* Some types are also in VAR_DOMAIN. */
3659 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3663 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3667 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3682 static struct compunit_symtab
*
3683 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
3684 const char *name
, domain_enum domain
)
3686 struct compunit_symtab
*stab_best
= NULL
;
3687 struct mapped_index
*index
;
3689 dw2_setup (objfile
);
3691 index
= dwarf2_per_objfile
->index_table
;
3693 /* index is NULL if OBJF_READNOW. */
3696 struct dw2_symtab_iterator iter
;
3697 struct dwarf2_per_cu_data
*per_cu
;
3699 dw2_symtab_iter_init (&iter
, index
, 1, block_index
, domain
, name
);
3701 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3703 struct symbol
*sym
, *with_opaque
= NULL
;
3704 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
);
3705 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
3706 struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
3708 sym
= block_find_symbol (block
, name
, domain
,
3709 block_find_non_opaque_type_preferred
,
3712 /* Some caution must be observed with overloaded functions
3713 and methods, since the index will not contain any overload
3714 information (but NAME might contain it). */
3717 && strcmp_iw (SYMBOL_SEARCH_NAME (sym
), name
) == 0)
3719 if (with_opaque
!= NULL
3720 && strcmp_iw (SYMBOL_SEARCH_NAME (with_opaque
), name
) == 0)
3723 /* Keep looking through other CUs. */
3731 dw2_print_stats (struct objfile
*objfile
)
3733 int i
, total
, count
;
3735 dw2_setup (objfile
);
3736 total
= dwarf2_per_objfile
->n_comp_units
+ dwarf2_per_objfile
->n_type_units
;
3738 for (i
= 0; i
< total
; ++i
)
3740 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3742 if (!per_cu
->v
.quick
->compunit_symtab
)
3745 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
3746 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3749 /* This dumps minimal information about the index.
3750 It is called via "mt print objfiles".
3751 One use is to verify .gdb_index has been loaded by the
3752 gdb.dwarf2/gdb-index.exp testcase. */
3755 dw2_dump (struct objfile
*objfile
)
3757 dw2_setup (objfile
);
3758 gdb_assert (dwarf2_per_objfile
->using_index
);
3759 printf_filtered (".gdb_index:");
3760 if (dwarf2_per_objfile
->index_table
!= NULL
)
3762 printf_filtered (" version %d\n",
3763 dwarf2_per_objfile
->index_table
->version
);
3766 printf_filtered (" faked for \"readnow\"\n");
3767 printf_filtered ("\n");
3771 dw2_relocate (struct objfile
*objfile
,
3772 const struct section_offsets
*new_offsets
,
3773 const struct section_offsets
*delta
)
3775 /* There's nothing to relocate here. */
3779 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
3780 const char *func_name
)
3782 struct mapped_index
*index
;
3784 dw2_setup (objfile
);
3786 index
= dwarf2_per_objfile
->index_table
;
3788 /* index is NULL if OBJF_READNOW. */
3791 struct dw2_symtab_iterator iter
;
3792 struct dwarf2_per_cu_data
*per_cu
;
3794 /* Note: It doesn't matter what we pass for block_index here. */
3795 dw2_symtab_iter_init (&iter
, index
, 0, GLOBAL_BLOCK
, VAR_DOMAIN
,
3798 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3799 dw2_instantiate_symtab (per_cu
);
3804 dw2_expand_all_symtabs (struct objfile
*objfile
)
3808 dw2_setup (objfile
);
3810 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3811 + dwarf2_per_objfile
->n_type_units
); ++i
)
3813 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3815 dw2_instantiate_symtab (per_cu
);
3820 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
3821 const char *fullname
)
3825 dw2_setup (objfile
);
3827 /* We don't need to consider type units here.
3828 This is only called for examining code, e.g. expand_line_sal.
3829 There can be an order of magnitude (or more) more type units
3830 than comp units, and we avoid them if we can. */
3832 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3835 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3836 struct quick_file_names
*file_data
;
3838 /* We only need to look at symtabs not already expanded. */
3839 if (per_cu
->v
.quick
->compunit_symtab
)
3842 file_data
= dw2_get_file_names (per_cu
);
3843 if (file_data
== NULL
)
3846 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3848 const char *this_fullname
= file_data
->file_names
[j
];
3850 if (filename_cmp (this_fullname
, fullname
) == 0)
3852 dw2_instantiate_symtab (per_cu
);
3860 dw2_map_matching_symbols (struct objfile
*objfile
,
3861 const char * name
, domain_enum domain
,
3863 int (*callback
) (struct block
*,
3864 struct symbol
*, void *),
3865 void *data
, symbol_compare_ftype
*match
,
3866 symbol_compare_ftype
*ordered_compare
)
3868 /* Currently unimplemented; used for Ada. The function can be called if the
3869 current language is Ada for a non-Ada objfile using GNU index. As Ada
3870 does not look for non-Ada symbols this function should just return. */
3874 dw2_expand_symtabs_matching
3875 (struct objfile
*objfile
,
3876 expand_symtabs_file_matcher_ftype
*file_matcher
,
3877 expand_symtabs_symbol_matcher_ftype
*symbol_matcher
,
3878 expand_symtabs_exp_notify_ftype
*expansion_notify
,
3879 enum search_domain kind
,
3884 struct mapped_index
*index
;
3886 dw2_setup (objfile
);
3888 /* index_table is NULL if OBJF_READNOW. */
3889 if (!dwarf2_per_objfile
->index_table
)
3891 index
= dwarf2_per_objfile
->index_table
;
3893 if (file_matcher
!= NULL
)
3895 struct cleanup
*cleanup
;
3896 htab_t visited_found
, visited_not_found
;
3898 visited_found
= htab_create_alloc (10,
3899 htab_hash_pointer
, htab_eq_pointer
,
3900 NULL
, xcalloc
, xfree
);
3901 cleanup
= make_cleanup_htab_delete (visited_found
);
3902 visited_not_found
= htab_create_alloc (10,
3903 htab_hash_pointer
, htab_eq_pointer
,
3904 NULL
, xcalloc
, xfree
);
3905 make_cleanup_htab_delete (visited_not_found
);
3907 /* The rule is CUs specify all the files, including those used by
3908 any TU, so there's no need to scan TUs here. */
3910 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3913 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3914 struct quick_file_names
*file_data
;
3919 per_cu
->v
.quick
->mark
= 0;
3921 /* We only need to look at symtabs not already expanded. */
3922 if (per_cu
->v
.quick
->compunit_symtab
)
3925 file_data
= dw2_get_file_names (per_cu
);
3926 if (file_data
== NULL
)
3929 if (htab_find (visited_not_found
, file_data
) != NULL
)
3931 else if (htab_find (visited_found
, file_data
) != NULL
)
3933 per_cu
->v
.quick
->mark
= 1;
3937 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3939 const char *this_real_name
;
3941 if (file_matcher (file_data
->file_names
[j
], data
, 0))
3943 per_cu
->v
.quick
->mark
= 1;
3947 /* Before we invoke realpath, which can get expensive when many
3948 files are involved, do a quick comparison of the basenames. */
3949 if (!basenames_may_differ
3950 && !file_matcher (lbasename (file_data
->file_names
[j
]),
3954 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3955 if (file_matcher (this_real_name
, data
, 0))
3957 per_cu
->v
.quick
->mark
= 1;
3962 slot
= htab_find_slot (per_cu
->v
.quick
->mark
3964 : visited_not_found
,
3969 do_cleanups (cleanup
);
3972 for (iter
= 0; iter
< index
->symbol_table_slots
; ++iter
)
3974 offset_type idx
= 2 * iter
;
3976 offset_type
*vec
, vec_len
, vec_idx
;
3977 int global_seen
= 0;
3981 if (index
->symbol_table
[idx
] == 0 && index
->symbol_table
[idx
+ 1] == 0)
3984 name
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[idx
]);
3986 if (! (*symbol_matcher
) (name
, data
))
3989 /* The name was matched, now expand corresponding CUs that were
3991 vec
= (offset_type
*) (index
->constant_pool
3992 + MAYBE_SWAP (index
->symbol_table
[idx
+ 1]));
3993 vec_len
= MAYBE_SWAP (vec
[0]);
3994 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
3996 struct dwarf2_per_cu_data
*per_cu
;
3997 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
3998 /* This value is only valid for index versions >= 7. */
3999 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
4000 gdb_index_symbol_kind symbol_kind
=
4001 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
4002 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
4003 /* Only check the symbol attributes if they're present.
4004 Indices prior to version 7 don't record them,
4005 and indices >= 7 may elide them for certain symbols
4006 (gold does this). */
4008 (index
->version
>= 7
4009 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
4011 /* Work around gold/15646. */
4014 if (!is_static
&& global_seen
)
4020 /* Only check the symbol's kind if it has one. */
4025 case VARIABLES_DOMAIN
:
4026 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
4029 case FUNCTIONS_DOMAIN
:
4030 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
4034 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4042 /* Don't crash on bad data. */
4043 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
4044 + dwarf2_per_objfile
->n_type_units
))
4046 complaint (&symfile_complaints
,
4047 _(".gdb_index entry has bad CU index"
4048 " [in module %s]"), objfile_name (objfile
));
4052 per_cu
= dw2_get_cutu (cu_index
);
4053 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
4055 int symtab_was_null
=
4056 (per_cu
->v
.quick
->compunit_symtab
== NULL
);
4058 dw2_instantiate_symtab (per_cu
);
4060 if (expansion_notify
!= NULL
4062 && per_cu
->v
.quick
->compunit_symtab
!= NULL
)
4064 expansion_notify (per_cu
->v
.quick
->compunit_symtab
,
4072 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
4075 static struct compunit_symtab
*
4076 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
4081 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
4082 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
4085 if (cust
->includes
== NULL
)
4088 for (i
= 0; cust
->includes
[i
]; ++i
)
4090 struct compunit_symtab
*s
= cust
->includes
[i
];
4092 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
4100 static struct compunit_symtab
*
4101 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
4102 struct bound_minimal_symbol msymbol
,
4104 struct obj_section
*section
,
4107 struct dwarf2_per_cu_data
*data
;
4108 struct compunit_symtab
*result
;
4110 dw2_setup (objfile
);
4112 if (!objfile
->psymtabs_addrmap
)
4115 data
= (struct dwarf2_per_cu_data
*) addrmap_find (objfile
->psymtabs_addrmap
,
4120 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
4121 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
4122 paddress (get_objfile_arch (objfile
), pc
));
4125 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
),
4127 gdb_assert (result
!= NULL
);
4132 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
4133 void *data
, int need_fullname
)
4136 struct cleanup
*cleanup
;
4137 htab_t visited
= htab_create_alloc (10, htab_hash_pointer
, htab_eq_pointer
,
4138 NULL
, xcalloc
, xfree
);
4140 cleanup
= make_cleanup_htab_delete (visited
);
4141 dw2_setup (objfile
);
4143 /* The rule is CUs specify all the files, including those used by
4144 any TU, so there's no need to scan TUs here.
4145 We can ignore file names coming from already-expanded CUs. */
4147 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4149 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4151 if (per_cu
->v
.quick
->compunit_symtab
)
4153 void **slot
= htab_find_slot (visited
, per_cu
->v
.quick
->file_names
,
4156 *slot
= per_cu
->v
.quick
->file_names
;
4160 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4163 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
4164 struct quick_file_names
*file_data
;
4167 /* We only need to look at symtabs not already expanded. */
4168 if (per_cu
->v
.quick
->compunit_symtab
)
4171 file_data
= dw2_get_file_names (per_cu
);
4172 if (file_data
== NULL
)
4175 slot
= htab_find_slot (visited
, file_data
, INSERT
);
4178 /* Already visited. */
4183 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
4185 const char *this_real_name
;
4188 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
4190 this_real_name
= NULL
;
4191 (*fun
) (file_data
->file_names
[j
], this_real_name
, data
);
4195 do_cleanups (cleanup
);
4199 dw2_has_symbols (struct objfile
*objfile
)
4204 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
4207 dw2_find_last_source_symtab
,
4208 dw2_forget_cached_source_info
,
4209 dw2_map_symtabs_matching_filename
,
4214 dw2_expand_symtabs_for_function
,
4215 dw2_expand_all_symtabs
,
4216 dw2_expand_symtabs_with_fullname
,
4217 dw2_map_matching_symbols
,
4218 dw2_expand_symtabs_matching
,
4219 dw2_find_pc_sect_compunit_symtab
,
4220 dw2_map_symbol_filenames
4223 /* Initialize for reading DWARF for this objfile. Return 0 if this
4224 file will use psymtabs, or 1 if using the GNU index. */
4227 dwarf2_initialize_objfile (struct objfile
*objfile
)
4229 /* If we're about to read full symbols, don't bother with the
4230 indices. In this case we also don't care if some other debug
4231 format is making psymtabs, because they are all about to be
4233 if ((objfile
->flags
& OBJF_READNOW
))
4237 dwarf2_per_objfile
->using_index
= 1;
4238 create_all_comp_units (objfile
);
4239 create_all_type_units (objfile
);
4240 dwarf2_per_objfile
->quick_file_names_table
=
4241 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
4243 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
4244 + dwarf2_per_objfile
->n_type_units
); ++i
)
4246 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4248 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4249 struct dwarf2_per_cu_quick_data
);
4252 /* Return 1 so that gdb sees the "quick" functions. However,
4253 these functions will be no-ops because we will have expanded
4258 if (dwarf2_read_index (objfile
))
4266 /* Build a partial symbol table. */
4269 dwarf2_build_psymtabs (struct objfile
*objfile
)
4272 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
4274 init_psymbol_list (objfile
, 1024);
4279 /* This isn't really ideal: all the data we allocate on the
4280 objfile's obstack is still uselessly kept around. However,
4281 freeing it seems unsafe. */
4282 struct cleanup
*cleanups
= make_cleanup_discard_psymtabs (objfile
);
4284 dwarf2_build_psymtabs_hard (objfile
);
4285 discard_cleanups (cleanups
);
4287 CATCH (except
, RETURN_MASK_ERROR
)
4289 exception_print (gdb_stderr
, except
);
4294 /* Return the total length of the CU described by HEADER. */
4297 get_cu_length (const struct comp_unit_head
*header
)
4299 return header
->initial_length_size
+ header
->length
;
4302 /* Return TRUE if OFFSET is within CU_HEADER. */
4305 offset_in_cu_p (const struct comp_unit_head
*cu_header
, sect_offset offset
)
4307 sect_offset bottom
= { cu_header
->offset
.sect_off
};
4308 sect_offset top
= { cu_header
->offset
.sect_off
+ get_cu_length (cu_header
) };
4310 return (offset
.sect_off
>= bottom
.sect_off
&& offset
.sect_off
< top
.sect_off
);
4313 /* Find the base address of the compilation unit for range lists and
4314 location lists. It will normally be specified by DW_AT_low_pc.
4315 In DWARF-3 draft 4, the base address could be overridden by
4316 DW_AT_entry_pc. It's been removed, but GCC still uses this for
4317 compilation units with discontinuous ranges. */
4320 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
4322 struct attribute
*attr
;
4325 cu
->base_address
= 0;
4327 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
4330 cu
->base_address
= attr_value_as_address (attr
);
4335 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4338 cu
->base_address
= attr_value_as_address (attr
);
4344 /* Read in the comp unit header information from the debug_info at info_ptr.
4345 NOTE: This leaves members offset, first_die_offset to be filled in
4348 static const gdb_byte
*
4349 read_comp_unit_head (struct comp_unit_head
*cu_header
,
4350 const gdb_byte
*info_ptr
, bfd
*abfd
)
4353 unsigned int bytes_read
;
4355 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
4356 cu_header
->initial_length_size
= bytes_read
;
4357 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
4358 info_ptr
+= bytes_read
;
4359 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
4361 cu_header
->abbrev_offset
.sect_off
= read_offset (abfd
, info_ptr
, cu_header
,
4363 info_ptr
+= bytes_read
;
4364 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
4366 signed_addr
= bfd_get_sign_extend_vma (abfd
);
4367 if (signed_addr
< 0)
4368 internal_error (__FILE__
, __LINE__
,
4369 _("read_comp_unit_head: dwarf from non elf file"));
4370 cu_header
->signed_addr_p
= signed_addr
;
4375 /* Helper function that returns the proper abbrev section for
4378 static struct dwarf2_section_info
*
4379 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
4381 struct dwarf2_section_info
*abbrev
;
4383 if (this_cu
->is_dwz
)
4384 abbrev
= &dwarf2_get_dwz_file ()->abbrev
;
4386 abbrev
= &dwarf2_per_objfile
->abbrev
;
4391 /* Subroutine of read_and_check_comp_unit_head and
4392 read_and_check_type_unit_head to simplify them.
4393 Perform various error checking on the header. */
4396 error_check_comp_unit_head (struct comp_unit_head
*header
,
4397 struct dwarf2_section_info
*section
,
4398 struct dwarf2_section_info
*abbrev_section
)
4400 const char *filename
= get_section_file_name (section
);
4402 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
4403 error (_("Dwarf Error: wrong version in compilation unit header "
4404 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
4407 if (header
->abbrev_offset
.sect_off
4408 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
4409 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
4410 "(offset 0x%lx + 6) [in module %s]"),
4411 (long) header
->abbrev_offset
.sect_off
, (long) header
->offset
.sect_off
,
4414 /* Cast to unsigned long to use 64-bit arithmetic when possible to
4415 avoid potential 32-bit overflow. */
4416 if (((unsigned long) header
->offset
.sect_off
+ get_cu_length (header
))
4418 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
4419 "(offset 0x%lx + 0) [in module %s]"),
4420 (long) header
->length
, (long) header
->offset
.sect_off
,
4424 /* Read in a CU/TU header and perform some basic error checking.
4425 The contents of the header are stored in HEADER.
4426 The result is a pointer to the start of the first DIE. */
4428 static const gdb_byte
*
4429 read_and_check_comp_unit_head (struct comp_unit_head
*header
,
4430 struct dwarf2_section_info
*section
,
4431 struct dwarf2_section_info
*abbrev_section
,
4432 const gdb_byte
*info_ptr
,
4433 int is_debug_types_section
)
4435 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
4436 bfd
*abfd
= get_section_bfd_owner (section
);
4438 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4440 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
4442 /* If we're reading a type unit, skip over the signature and
4443 type_offset fields. */
4444 if (is_debug_types_section
)
4445 info_ptr
+= 8 /*signature*/ + header
->offset_size
;
4447 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4449 error_check_comp_unit_head (header
, section
, abbrev_section
);
4454 /* Read in the types comp unit header information from .debug_types entry at
4455 types_ptr. The result is a pointer to one past the end of the header. */
4457 static const gdb_byte
*
4458 read_and_check_type_unit_head (struct comp_unit_head
*header
,
4459 struct dwarf2_section_info
*section
,
4460 struct dwarf2_section_info
*abbrev_section
,
4461 const gdb_byte
*info_ptr
,
4462 ULONGEST
*signature
,
4463 cu_offset
*type_offset_in_tu
)
4465 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
4466 bfd
*abfd
= get_section_bfd_owner (section
);
4468 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4470 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
4472 /* If we're reading a type unit, skip over the signature and
4473 type_offset fields. */
4474 if (signature
!= NULL
)
4475 *signature
= read_8_bytes (abfd
, info_ptr
);
4477 if (type_offset_in_tu
!= NULL
)
4478 type_offset_in_tu
->cu_off
= read_offset_1 (abfd
, info_ptr
,
4479 header
->offset_size
);
4480 info_ptr
+= header
->offset_size
;
4482 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4484 error_check_comp_unit_head (header
, section
, abbrev_section
);
4489 /* Fetch the abbreviation table offset from a comp or type unit header. */
4492 read_abbrev_offset (struct dwarf2_section_info
*section
,
4495 bfd
*abfd
= get_section_bfd_owner (section
);
4496 const gdb_byte
*info_ptr
;
4497 unsigned int length
, initial_length_size
, offset_size
;
4498 sect_offset abbrev_offset
;
4500 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
4501 info_ptr
= section
->buffer
+ offset
.sect_off
;
4502 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
4503 offset_size
= initial_length_size
== 4 ? 4 : 8;
4504 info_ptr
+= initial_length_size
+ 2 /*version*/;
4505 abbrev_offset
.sect_off
= read_offset_1 (abfd
, info_ptr
, offset_size
);
4506 return abbrev_offset
;
4509 /* Allocate a new partial symtab for file named NAME and mark this new
4510 partial symtab as being an include of PST. */
4513 dwarf2_create_include_psymtab (const char *name
, struct partial_symtab
*pst
,
4514 struct objfile
*objfile
)
4516 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
4518 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
4520 /* It shares objfile->objfile_obstack. */
4521 subpst
->dirname
= pst
->dirname
;
4524 subpst
->textlow
= 0;
4525 subpst
->texthigh
= 0;
4527 subpst
->dependencies
4528 = XOBNEW (&objfile
->objfile_obstack
, struct partial_symtab
*);
4529 subpst
->dependencies
[0] = pst
;
4530 subpst
->number_of_dependencies
= 1;
4532 subpst
->globals_offset
= 0;
4533 subpst
->n_global_syms
= 0;
4534 subpst
->statics_offset
= 0;
4535 subpst
->n_static_syms
= 0;
4536 subpst
->compunit_symtab
= NULL
;
4537 subpst
->read_symtab
= pst
->read_symtab
;
4540 /* No private part is necessary for include psymtabs. This property
4541 can be used to differentiate between such include psymtabs and
4542 the regular ones. */
4543 subpst
->read_symtab_private
= NULL
;
4546 /* Read the Line Number Program data and extract the list of files
4547 included by the source file represented by PST. Build an include
4548 partial symtab for each of these included files. */
4551 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
4552 struct die_info
*die
,
4553 struct partial_symtab
*pst
)
4555 struct line_header
*lh
= NULL
;
4556 struct attribute
*attr
;
4558 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
4560 lh
= dwarf_decode_line_header (DW_UNSND (attr
), cu
);
4562 return; /* No linetable, so no includes. */
4564 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
4565 dwarf_decode_lines (lh
, pst
->dirname
, cu
, pst
, pst
->textlow
, 1);
4567 free_line_header (lh
);
4571 hash_signatured_type (const void *item
)
4573 const struct signatured_type
*sig_type
4574 = (const struct signatured_type
*) item
;
4576 /* This drops the top 32 bits of the signature, but is ok for a hash. */
4577 return sig_type
->signature
;
4581 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
4583 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
4584 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
4586 return lhs
->signature
== rhs
->signature
;
4589 /* Allocate a hash table for signatured types. */
4592 allocate_signatured_type_table (struct objfile
*objfile
)
4594 return htab_create_alloc_ex (41,
4595 hash_signatured_type
,
4598 &objfile
->objfile_obstack
,
4599 hashtab_obstack_allocate
,
4600 dummy_obstack_deallocate
);
4603 /* A helper function to add a signatured type CU to a table. */
4606 add_signatured_type_cu_to_table (void **slot
, void *datum
)
4608 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
4609 struct signatured_type
***datap
= (struct signatured_type
***) datum
;
4617 /* Create the hash table of all entries in the .debug_types
4618 (or .debug_types.dwo) section(s).
4619 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
4620 otherwise it is NULL.
4622 The result is a pointer to the hash table or NULL if there are no types.
4624 Note: This function processes DWO files only, not DWP files. */
4627 create_debug_types_hash_table (struct dwo_file
*dwo_file
,
4628 VEC (dwarf2_section_info_def
) *types
)
4630 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4631 htab_t types_htab
= NULL
;
4633 struct dwarf2_section_info
*section
;
4634 struct dwarf2_section_info
*abbrev_section
;
4636 if (VEC_empty (dwarf2_section_info_def
, types
))
4639 abbrev_section
= (dwo_file
!= NULL
4640 ? &dwo_file
->sections
.abbrev
4641 : &dwarf2_per_objfile
->abbrev
);
4643 if (dwarf_read_debug
)
4644 fprintf_unfiltered (gdb_stdlog
, "Reading .debug_types%s for %s:\n",
4645 dwo_file
? ".dwo" : "",
4646 get_section_file_name (abbrev_section
));
4649 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
4653 const gdb_byte
*info_ptr
, *end_ptr
;
4655 dwarf2_read_section (objfile
, section
);
4656 info_ptr
= section
->buffer
;
4658 if (info_ptr
== NULL
)
4661 /* We can't set abfd until now because the section may be empty or
4662 not present, in which case the bfd is unknown. */
4663 abfd
= get_section_bfd_owner (section
);
4665 /* We don't use init_cutu_and_read_dies_simple, or some such, here
4666 because we don't need to read any dies: the signature is in the
4669 end_ptr
= info_ptr
+ section
->size
;
4670 while (info_ptr
< end_ptr
)
4673 cu_offset type_offset_in_tu
;
4675 struct signatured_type
*sig_type
;
4676 struct dwo_unit
*dwo_tu
;
4678 const gdb_byte
*ptr
= info_ptr
;
4679 struct comp_unit_head header
;
4680 unsigned int length
;
4682 offset
.sect_off
= ptr
- section
->buffer
;
4684 /* We need to read the type's signature in order to build the hash
4685 table, but we don't need anything else just yet. */
4687 ptr
= read_and_check_type_unit_head (&header
, section
,
4688 abbrev_section
, ptr
,
4689 &signature
, &type_offset_in_tu
);
4691 length
= get_cu_length (&header
);
4693 /* Skip dummy type units. */
4694 if (ptr
>= info_ptr
+ length
4695 || peek_abbrev_code (abfd
, ptr
) == 0)
4701 if (types_htab
== NULL
)
4704 types_htab
= allocate_dwo_unit_table (objfile
);
4706 types_htab
= allocate_signatured_type_table (objfile
);
4712 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4714 dwo_tu
->dwo_file
= dwo_file
;
4715 dwo_tu
->signature
= signature
;
4716 dwo_tu
->type_offset_in_tu
= type_offset_in_tu
;
4717 dwo_tu
->section
= section
;
4718 dwo_tu
->offset
= offset
;
4719 dwo_tu
->length
= length
;
4723 /* N.B.: type_offset is not usable if this type uses a DWO file.
4724 The real type_offset is in the DWO file. */
4726 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4727 struct signatured_type
);
4728 sig_type
->signature
= signature
;
4729 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
4730 sig_type
->per_cu
.objfile
= objfile
;
4731 sig_type
->per_cu
.is_debug_types
= 1;
4732 sig_type
->per_cu
.section
= section
;
4733 sig_type
->per_cu
.offset
= offset
;
4734 sig_type
->per_cu
.length
= length
;
4737 slot
= htab_find_slot (types_htab
,
4738 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
4740 gdb_assert (slot
!= NULL
);
4743 sect_offset dup_offset
;
4747 const struct dwo_unit
*dup_tu
4748 = (const struct dwo_unit
*) *slot
;
4750 dup_offset
= dup_tu
->offset
;
4754 const struct signatured_type
*dup_tu
4755 = (const struct signatured_type
*) *slot
;
4757 dup_offset
= dup_tu
->per_cu
.offset
;
4760 complaint (&symfile_complaints
,
4761 _("debug type entry at offset 0x%x is duplicate to"
4762 " the entry at offset 0x%x, signature %s"),
4763 offset
.sect_off
, dup_offset
.sect_off
,
4764 hex_string (signature
));
4766 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
4768 if (dwarf_read_debug
> 1)
4769 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature %s\n",
4771 hex_string (signature
));
4780 /* Create the hash table of all entries in the .debug_types section,
4781 and initialize all_type_units.
4782 The result is zero if there is an error (e.g. missing .debug_types section),
4783 otherwise non-zero. */
4786 create_all_type_units (struct objfile
*objfile
)
4789 struct signatured_type
**iter
;
4791 types_htab
= create_debug_types_hash_table (NULL
, dwarf2_per_objfile
->types
);
4792 if (types_htab
== NULL
)
4794 dwarf2_per_objfile
->signatured_types
= NULL
;
4798 dwarf2_per_objfile
->signatured_types
= types_htab
;
4800 dwarf2_per_objfile
->n_type_units
4801 = dwarf2_per_objfile
->n_allocated_type_units
4802 = htab_elements (types_htab
);
4803 dwarf2_per_objfile
->all_type_units
=
4804 XNEWVEC (struct signatured_type
*, dwarf2_per_objfile
->n_type_units
);
4805 iter
= &dwarf2_per_objfile
->all_type_units
[0];
4806 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
4807 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
4808 == dwarf2_per_objfile
->n_type_units
);
4813 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
4814 If SLOT is non-NULL, it is the entry to use in the hash table.
4815 Otherwise we find one. */
4817 static struct signatured_type
*
4818 add_type_unit (ULONGEST sig
, void **slot
)
4820 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4821 int n_type_units
= dwarf2_per_objfile
->n_type_units
;
4822 struct signatured_type
*sig_type
;
4824 gdb_assert (n_type_units
<= dwarf2_per_objfile
->n_allocated_type_units
);
4826 if (n_type_units
> dwarf2_per_objfile
->n_allocated_type_units
)
4828 if (dwarf2_per_objfile
->n_allocated_type_units
== 0)
4829 dwarf2_per_objfile
->n_allocated_type_units
= 1;
4830 dwarf2_per_objfile
->n_allocated_type_units
*= 2;
4831 dwarf2_per_objfile
->all_type_units
4832 = XRESIZEVEC (struct signatured_type
*,
4833 dwarf2_per_objfile
->all_type_units
,
4834 dwarf2_per_objfile
->n_allocated_type_units
);
4835 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
4837 dwarf2_per_objfile
->n_type_units
= n_type_units
;
4839 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4840 struct signatured_type
);
4841 dwarf2_per_objfile
->all_type_units
[n_type_units
- 1] = sig_type
;
4842 sig_type
->signature
= sig
;
4843 sig_type
->per_cu
.is_debug_types
= 1;
4844 if (dwarf2_per_objfile
->using_index
)
4846 sig_type
->per_cu
.v
.quick
=
4847 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4848 struct dwarf2_per_cu_quick_data
);
4853 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4856 gdb_assert (*slot
== NULL
);
4858 /* The rest of sig_type must be filled in by the caller. */
4862 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
4863 Fill in SIG_ENTRY with DWO_ENTRY. */
4866 fill_in_sig_entry_from_dwo_entry (struct objfile
*objfile
,
4867 struct signatured_type
*sig_entry
,
4868 struct dwo_unit
*dwo_entry
)
4870 /* Make sure we're not clobbering something we don't expect to. */
4871 gdb_assert (! sig_entry
->per_cu
.queued
);
4872 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
4873 if (dwarf2_per_objfile
->using_index
)
4875 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
4876 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
4879 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
4880 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
4881 gdb_assert (sig_entry
->type_offset_in_section
.sect_off
== 0);
4882 gdb_assert (sig_entry
->type_unit_group
== NULL
);
4883 gdb_assert (sig_entry
->dwo_unit
== NULL
);
4885 sig_entry
->per_cu
.section
= dwo_entry
->section
;
4886 sig_entry
->per_cu
.offset
= dwo_entry
->offset
;
4887 sig_entry
->per_cu
.length
= dwo_entry
->length
;
4888 sig_entry
->per_cu
.reading_dwo_directly
= 1;
4889 sig_entry
->per_cu
.objfile
= objfile
;
4890 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
4891 sig_entry
->dwo_unit
= dwo_entry
;
4894 /* Subroutine of lookup_signatured_type.
4895 If we haven't read the TU yet, create the signatured_type data structure
4896 for a TU to be read in directly from a DWO file, bypassing the stub.
4897 This is the "Stay in DWO Optimization": When there is no DWP file and we're
4898 using .gdb_index, then when reading a CU we want to stay in the DWO file
4899 containing that CU. Otherwise we could end up reading several other DWO
4900 files (due to comdat folding) to process the transitive closure of all the
4901 mentioned TUs, and that can be slow. The current DWO file will have every
4902 type signature that it needs.
4903 We only do this for .gdb_index because in the psymtab case we already have
4904 to read all the DWOs to build the type unit groups. */
4906 static struct signatured_type
*
4907 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4909 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4910 struct dwo_file
*dwo_file
;
4911 struct dwo_unit find_dwo_entry
, *dwo_entry
;
4912 struct signatured_type find_sig_entry
, *sig_entry
;
4915 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
4917 /* If TU skeletons have been removed then we may not have read in any
4919 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4921 dwarf2_per_objfile
->signatured_types
4922 = allocate_signatured_type_table (objfile
);
4925 /* We only ever need to read in one copy of a signatured type.
4926 Use the global signatured_types array to do our own comdat-folding
4927 of types. If this is the first time we're reading this TU, and
4928 the TU has an entry in .gdb_index, replace the recorded data from
4929 .gdb_index with this TU. */
4931 find_sig_entry
.signature
= sig
;
4932 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4933 &find_sig_entry
, INSERT
);
4934 sig_entry
= (struct signatured_type
*) *slot
;
4936 /* We can get here with the TU already read, *or* in the process of being
4937 read. Don't reassign the global entry to point to this DWO if that's
4938 the case. Also note that if the TU is already being read, it may not
4939 have come from a DWO, the program may be a mix of Fission-compiled
4940 code and non-Fission-compiled code. */
4942 /* Have we already tried to read this TU?
4943 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
4944 needn't exist in the global table yet). */
4945 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
4948 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
4949 dwo_unit of the TU itself. */
4950 dwo_file
= cu
->dwo_unit
->dwo_file
;
4952 /* Ok, this is the first time we're reading this TU. */
4953 if (dwo_file
->tus
== NULL
)
4955 find_dwo_entry
.signature
= sig
;
4956 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_entry
);
4957 if (dwo_entry
== NULL
)
4960 /* If the global table doesn't have an entry for this TU, add one. */
4961 if (sig_entry
== NULL
)
4962 sig_entry
= add_type_unit (sig
, slot
);
4964 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
4965 sig_entry
->per_cu
.tu_read
= 1;
4969 /* Subroutine of lookup_signatured_type.
4970 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
4971 then try the DWP file. If the TU stub (skeleton) has been removed then
4972 it won't be in .gdb_index. */
4974 static struct signatured_type
*
4975 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4977 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4978 struct dwp_file
*dwp_file
= get_dwp_file ();
4979 struct dwo_unit
*dwo_entry
;
4980 struct signatured_type find_sig_entry
, *sig_entry
;
4983 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
4984 gdb_assert (dwp_file
!= NULL
);
4986 /* If TU skeletons have been removed then we may not have read in any
4988 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4990 dwarf2_per_objfile
->signatured_types
4991 = allocate_signatured_type_table (objfile
);
4994 find_sig_entry
.signature
= sig
;
4995 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4996 &find_sig_entry
, INSERT
);
4997 sig_entry
= (struct signatured_type
*) *slot
;
4999 /* Have we already tried to read this TU?
5000 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
5001 needn't exist in the global table yet). */
5002 if (sig_entry
!= NULL
)
5005 if (dwp_file
->tus
== NULL
)
5007 dwo_entry
= lookup_dwo_unit_in_dwp (dwp_file
, NULL
,
5008 sig
, 1 /* is_debug_types */);
5009 if (dwo_entry
== NULL
)
5012 sig_entry
= add_type_unit (sig
, slot
);
5013 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
5018 /* Lookup a signature based type for DW_FORM_ref_sig8.
5019 Returns NULL if signature SIG is not present in the table.
5020 It is up to the caller to complain about this. */
5022 static struct signatured_type
*
5023 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
5026 && dwarf2_per_objfile
->using_index
)
5028 /* We're in a DWO/DWP file, and we're using .gdb_index.
5029 These cases require special processing. */
5030 if (get_dwp_file () == NULL
)
5031 return lookup_dwo_signatured_type (cu
, sig
);
5033 return lookup_dwp_signatured_type (cu
, sig
);
5037 struct signatured_type find_entry
, *entry
;
5039 if (dwarf2_per_objfile
->signatured_types
== NULL
)
5041 find_entry
.signature
= sig
;
5042 entry
= ((struct signatured_type
*)
5043 htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
));
5048 /* Low level DIE reading support. */
5050 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
5053 init_cu_die_reader (struct die_reader_specs
*reader
,
5054 struct dwarf2_cu
*cu
,
5055 struct dwarf2_section_info
*section
,
5056 struct dwo_file
*dwo_file
)
5058 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
5059 reader
->abfd
= get_section_bfd_owner (section
);
5061 reader
->dwo_file
= dwo_file
;
5062 reader
->die_section
= section
;
5063 reader
->buffer
= section
->buffer
;
5064 reader
->buffer_end
= section
->buffer
+ section
->size
;
5065 reader
->comp_dir
= NULL
;
5068 /* Subroutine of init_cutu_and_read_dies to simplify it.
5069 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
5070 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
5073 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
5074 from it to the DIE in the DWO. If NULL we are skipping the stub.
5075 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
5076 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
5077 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
5078 STUB_COMP_DIR may be non-NULL.
5079 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
5080 are filled in with the info of the DIE from the DWO file.
5081 ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies
5082 provided an abbrev table to use.
5083 The result is non-zero if a valid (non-dummy) DIE was found. */
5086 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
5087 struct dwo_unit
*dwo_unit
,
5088 int abbrev_table_provided
,
5089 struct die_info
*stub_comp_unit_die
,
5090 const char *stub_comp_dir
,
5091 struct die_reader_specs
*result_reader
,
5092 const gdb_byte
**result_info_ptr
,
5093 struct die_info
**result_comp_unit_die
,
5094 int *result_has_children
)
5096 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5097 struct dwarf2_cu
*cu
= this_cu
->cu
;
5098 struct dwarf2_section_info
*section
;
5100 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5101 ULONGEST signature
; /* Or dwo_id. */
5102 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
5103 int i
,num_extra_attrs
;
5104 struct dwarf2_section_info
*dwo_abbrev_section
;
5105 struct attribute
*attr
;
5106 struct die_info
*comp_unit_die
;
5108 /* At most one of these may be provided. */
5109 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
5111 /* These attributes aren't processed until later:
5112 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
5113 DW_AT_comp_dir is used now, to find the DWO file, but it is also
5114 referenced later. However, these attributes are found in the stub
5115 which we won't have later. In order to not impose this complication
5116 on the rest of the code, we read them here and copy them to the
5125 if (stub_comp_unit_die
!= NULL
)
5127 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
5129 if (! this_cu
->is_debug_types
)
5130 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
5131 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
5132 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
5133 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
5134 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
5136 /* There should be a DW_AT_addr_base attribute here (if needed).
5137 We need the value before we can process DW_FORM_GNU_addr_index. */
5139 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
5141 cu
->addr_base
= DW_UNSND (attr
);
5143 /* There should be a DW_AT_ranges_base attribute here (if needed).
5144 We need the value before we can process DW_AT_ranges. */
5145 cu
->ranges_base
= 0;
5146 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
5148 cu
->ranges_base
= DW_UNSND (attr
);
5150 else if (stub_comp_dir
!= NULL
)
5152 /* Reconstruct the comp_dir attribute to simplify the code below. */
5153 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
5154 comp_dir
->name
= DW_AT_comp_dir
;
5155 comp_dir
->form
= DW_FORM_string
;
5156 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
5157 DW_STRING (comp_dir
) = stub_comp_dir
;
5160 /* Set up for reading the DWO CU/TU. */
5161 cu
->dwo_unit
= dwo_unit
;
5162 section
= dwo_unit
->section
;
5163 dwarf2_read_section (objfile
, section
);
5164 abfd
= get_section_bfd_owner (section
);
5165 begin_info_ptr
= info_ptr
= section
->buffer
+ dwo_unit
->offset
.sect_off
;
5166 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
5167 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
);
5169 if (this_cu
->is_debug_types
)
5171 ULONGEST header_signature
;
5172 cu_offset type_offset_in_tu
;
5173 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
5175 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
5179 &type_offset_in_tu
);
5180 /* This is not an assert because it can be caused by bad debug info. */
5181 if (sig_type
->signature
!= header_signature
)
5183 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
5184 " TU at offset 0x%x [in module %s]"),
5185 hex_string (sig_type
->signature
),
5186 hex_string (header_signature
),
5187 dwo_unit
->offset
.sect_off
,
5188 bfd_get_filename (abfd
));
5190 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5191 /* For DWOs coming from DWP files, we don't know the CU length
5192 nor the type's offset in the TU until now. */
5193 dwo_unit
->length
= get_cu_length (&cu
->header
);
5194 dwo_unit
->type_offset_in_tu
= type_offset_in_tu
;
5196 /* Establish the type offset that can be used to lookup the type.
5197 For DWO files, we don't know it until now. */
5198 sig_type
->type_offset_in_section
.sect_off
=
5199 dwo_unit
->offset
.sect_off
+ dwo_unit
->type_offset_in_tu
.cu_off
;
5203 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5206 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5207 /* For DWOs coming from DWP files, we don't know the CU length
5209 dwo_unit
->length
= get_cu_length (&cu
->header
);
5212 /* Replace the CU's original abbrev table with the DWO's.
5213 Reminder: We can't read the abbrev table until we've read the header. */
5214 if (abbrev_table_provided
)
5216 /* Don't free the provided abbrev table, the caller of
5217 init_cutu_and_read_dies owns it. */
5218 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5219 /* Ensure the DWO abbrev table gets freed. */
5220 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5224 dwarf2_free_abbrev_table (cu
);
5225 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5226 /* Leave any existing abbrev table cleanup as is. */
5229 /* Read in the die, but leave space to copy over the attributes
5230 from the stub. This has the benefit of simplifying the rest of
5231 the code - all the work to maintain the illusion of a single
5232 DW_TAG_{compile,type}_unit DIE is done here. */
5233 num_extra_attrs
= ((stmt_list
!= NULL
)
5237 + (comp_dir
!= NULL
));
5238 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
5239 result_has_children
, num_extra_attrs
);
5241 /* Copy over the attributes from the stub to the DIE we just read in. */
5242 comp_unit_die
= *result_comp_unit_die
;
5243 i
= comp_unit_die
->num_attrs
;
5244 if (stmt_list
!= NULL
)
5245 comp_unit_die
->attrs
[i
++] = *stmt_list
;
5247 comp_unit_die
->attrs
[i
++] = *low_pc
;
5248 if (high_pc
!= NULL
)
5249 comp_unit_die
->attrs
[i
++] = *high_pc
;
5251 comp_unit_die
->attrs
[i
++] = *ranges
;
5252 if (comp_dir
!= NULL
)
5253 comp_unit_die
->attrs
[i
++] = *comp_dir
;
5254 comp_unit_die
->num_attrs
+= num_extra_attrs
;
5256 if (dwarf_die_debug
)
5258 fprintf_unfiltered (gdb_stdlog
,
5259 "Read die from %s@0x%x of %s:\n",
5260 get_section_name (section
),
5261 (unsigned) (begin_info_ptr
- section
->buffer
),
5262 bfd_get_filename (abfd
));
5263 dump_die (comp_unit_die
, dwarf_die_debug
);
5266 /* Save the comp_dir attribute. If there is no DWP file then we'll read
5267 TUs by skipping the stub and going directly to the entry in the DWO file.
5268 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
5269 to get it via circuitous means. Blech. */
5270 if (comp_dir
!= NULL
)
5271 result_reader
->comp_dir
= DW_STRING (comp_dir
);
5273 /* Skip dummy compilation units. */
5274 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
5275 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5278 *result_info_ptr
= info_ptr
;
5282 /* Subroutine of init_cutu_and_read_dies to simplify it.
5283 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
5284 Returns NULL if the specified DWO unit cannot be found. */
5286 static struct dwo_unit
*
5287 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
5288 struct die_info
*comp_unit_die
)
5290 struct dwarf2_cu
*cu
= this_cu
->cu
;
5291 struct attribute
*attr
;
5293 struct dwo_unit
*dwo_unit
;
5294 const char *comp_dir
, *dwo_name
;
5296 gdb_assert (cu
!= NULL
);
5298 /* Yeah, we look dwo_name up again, but it simplifies the code. */
5299 dwo_name
= dwarf2_string_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5300 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
5302 if (this_cu
->is_debug_types
)
5304 struct signatured_type
*sig_type
;
5306 /* Since this_cu is the first member of struct signatured_type,
5307 we can go from a pointer to one to a pointer to the other. */
5308 sig_type
= (struct signatured_type
*) this_cu
;
5309 signature
= sig_type
->signature
;
5310 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
5314 struct attribute
*attr
;
5316 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
5318 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
5320 dwo_name
, objfile_name (this_cu
->objfile
));
5321 signature
= DW_UNSND (attr
);
5322 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
5329 /* Subroutine of init_cutu_and_read_dies to simplify it.
5330 See it for a description of the parameters.
5331 Read a TU directly from a DWO file, bypassing the stub.
5333 Note: This function could be a little bit simpler if we shared cleanups
5334 with our caller, init_cutu_and_read_dies. That's generally a fragile thing
5335 to do, so we keep this function self-contained. Or we could move this
5336 into our caller, but it's complex enough already. */
5339 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
5340 int use_existing_cu
, int keep
,
5341 die_reader_func_ftype
*die_reader_func
,
5344 struct dwarf2_cu
*cu
;
5345 struct signatured_type
*sig_type
;
5346 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5347 struct die_reader_specs reader
;
5348 const gdb_byte
*info_ptr
;
5349 struct die_info
*comp_unit_die
;
5352 /* Verify we can do the following downcast, and that we have the
5354 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
5355 sig_type
= (struct signatured_type
*) this_cu
;
5356 gdb_assert (sig_type
->dwo_unit
!= NULL
);
5358 cleanups
= make_cleanup (null_cleanup
, NULL
);
5360 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5362 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
5364 /* There's no need to do the rereading_dwo_cu handling that
5365 init_cutu_and_read_dies does since we don't read the stub. */
5369 /* If !use_existing_cu, this_cu->cu must be NULL. */
5370 gdb_assert (this_cu
->cu
== NULL
);
5371 cu
= XNEW (struct dwarf2_cu
);
5372 init_one_comp_unit (cu
, this_cu
);
5373 /* If an error occurs while loading, release our storage. */
5374 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5377 /* A future optimization, if needed, would be to use an existing
5378 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
5379 could share abbrev tables. */
5381 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
5382 0 /* abbrev_table_provided */,
5383 NULL
/* stub_comp_unit_die */,
5384 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
5386 &comp_unit_die
, &has_children
) == 0)
5389 do_cleanups (cleanups
);
5393 /* All the "real" work is done here. */
5394 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5396 /* This duplicates the code in init_cutu_and_read_dies,
5397 but the alternative is making the latter more complex.
5398 This function is only for the special case of using DWO files directly:
5399 no point in overly complicating the general case just to handle this. */
5400 if (free_cu_cleanup
!= NULL
)
5404 /* We've successfully allocated this compilation unit. Let our
5405 caller clean it up when finished with it. */
5406 discard_cleanups (free_cu_cleanup
);
5408 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5409 So we have to manually free the abbrev table. */
5410 dwarf2_free_abbrev_table (cu
);
5412 /* Link this CU into read_in_chain. */
5413 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5414 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5417 do_cleanups (free_cu_cleanup
);
5420 do_cleanups (cleanups
);
5423 /* Initialize a CU (or TU) and read its DIEs.
5424 If the CU defers to a DWO file, read the DWO file as well.
5426 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
5427 Otherwise the table specified in the comp unit header is read in and used.
5428 This is an optimization for when we already have the abbrev table.
5430 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
5431 Otherwise, a new CU is allocated with xmalloc.
5433 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
5434 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
5436 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5437 linker) then DIE_READER_FUNC will not get called. */
5440 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
5441 struct abbrev_table
*abbrev_table
,
5442 int use_existing_cu
, int keep
,
5443 die_reader_func_ftype
*die_reader_func
,
5446 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5447 struct dwarf2_section_info
*section
= this_cu
->section
;
5448 bfd
*abfd
= get_section_bfd_owner (section
);
5449 struct dwarf2_cu
*cu
;
5450 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5451 struct die_reader_specs reader
;
5452 struct die_info
*comp_unit_die
;
5454 struct attribute
*attr
;
5455 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5456 struct signatured_type
*sig_type
= NULL
;
5457 struct dwarf2_section_info
*abbrev_section
;
5458 /* Non-zero if CU currently points to a DWO file and we need to
5459 reread it. When this happens we need to reread the skeleton die
5460 before we can reread the DWO file (this only applies to CUs, not TUs). */
5461 int rereading_dwo_cu
= 0;
5463 if (dwarf_die_debug
)
5464 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5465 this_cu
->is_debug_types
? "type" : "comp",
5466 this_cu
->offset
.sect_off
);
5468 if (use_existing_cu
)
5471 /* If we're reading a TU directly from a DWO file, including a virtual DWO
5472 file (instead of going through the stub), short-circuit all of this. */
5473 if (this_cu
->reading_dwo_directly
)
5475 /* Narrow down the scope of possibilities to have to understand. */
5476 gdb_assert (this_cu
->is_debug_types
);
5477 gdb_assert (abbrev_table
== NULL
);
5478 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
, keep
,
5479 die_reader_func
, data
);
5483 cleanups
= make_cleanup (null_cleanup
, NULL
);
5485 /* This is cheap if the section is already read in. */
5486 dwarf2_read_section (objfile
, section
);
5488 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
5490 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
5492 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5495 /* If this CU is from a DWO file we need to start over, we need to
5496 refetch the attributes from the skeleton CU.
5497 This could be optimized by retrieving those attributes from when we
5498 were here the first time: the previous comp_unit_die was stored in
5499 comp_unit_obstack. But there's no data yet that we need this
5501 if (cu
->dwo_unit
!= NULL
)
5502 rereading_dwo_cu
= 1;
5506 /* If !use_existing_cu, this_cu->cu must be NULL. */
5507 gdb_assert (this_cu
->cu
== NULL
);
5508 cu
= XNEW (struct dwarf2_cu
);
5509 init_one_comp_unit (cu
, this_cu
);
5510 /* If an error occurs while loading, release our storage. */
5511 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5514 /* Get the header. */
5515 if (cu
->header
.first_die_offset
.cu_off
!= 0 && ! rereading_dwo_cu
)
5517 /* We already have the header, there's no need to read it in again. */
5518 info_ptr
+= cu
->header
.first_die_offset
.cu_off
;
5522 if (this_cu
->is_debug_types
)
5525 cu_offset type_offset_in_tu
;
5527 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
5528 abbrev_section
, info_ptr
,
5530 &type_offset_in_tu
);
5532 /* Since per_cu is the first member of struct signatured_type,
5533 we can go from a pointer to one to a pointer to the other. */
5534 sig_type
= (struct signatured_type
*) this_cu
;
5535 gdb_assert (sig_type
->signature
== signature
);
5536 gdb_assert (sig_type
->type_offset_in_tu
.cu_off
5537 == type_offset_in_tu
.cu_off
);
5538 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5540 /* LENGTH has not been set yet for type units if we're
5541 using .gdb_index. */
5542 this_cu
->length
= get_cu_length (&cu
->header
);
5544 /* Establish the type offset that can be used to lookup the type. */
5545 sig_type
->type_offset_in_section
.sect_off
=
5546 this_cu
->offset
.sect_off
+ sig_type
->type_offset_in_tu
.cu_off
;
5550 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5554 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5555 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
5559 /* Skip dummy compilation units. */
5560 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5561 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5563 do_cleanups (cleanups
);
5567 /* If we don't have them yet, read the abbrevs for this compilation unit.
5568 And if we need to read them now, make sure they're freed when we're
5569 done. Note that it's important that if the CU had an abbrev table
5570 on entry we don't free it when we're done: Somewhere up the call stack
5571 it may be in use. */
5572 if (abbrev_table
!= NULL
)
5574 gdb_assert (cu
->abbrev_table
== NULL
);
5575 gdb_assert (cu
->header
.abbrev_offset
.sect_off
5576 == abbrev_table
->offset
.sect_off
);
5577 cu
->abbrev_table
= abbrev_table
;
5579 else if (cu
->abbrev_table
== NULL
)
5581 dwarf2_read_abbrevs (cu
, abbrev_section
);
5582 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5584 else if (rereading_dwo_cu
)
5586 dwarf2_free_abbrev_table (cu
);
5587 dwarf2_read_abbrevs (cu
, abbrev_section
);
5590 /* Read the top level CU/TU die. */
5591 init_cu_die_reader (&reader
, cu
, section
, NULL
);
5592 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5594 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
5596 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
5597 DWO CU, that this test will fail (the attribute will not be present). */
5598 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5601 struct dwo_unit
*dwo_unit
;
5602 struct die_info
*dwo_comp_unit_die
;
5606 complaint (&symfile_complaints
,
5607 _("compilation unit with DW_AT_GNU_dwo_name"
5608 " has children (offset 0x%x) [in module %s]"),
5609 this_cu
->offset
.sect_off
, bfd_get_filename (abfd
));
5611 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
);
5612 if (dwo_unit
!= NULL
)
5614 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
5615 abbrev_table
!= NULL
,
5616 comp_unit_die
, NULL
,
5618 &dwo_comp_unit_die
, &has_children
) == 0)
5621 do_cleanups (cleanups
);
5624 comp_unit_die
= dwo_comp_unit_die
;
5628 /* Yikes, we couldn't find the rest of the DIE, we only have
5629 the stub. A complaint has already been logged. There's
5630 not much more we can do except pass on the stub DIE to
5631 die_reader_func. We don't want to throw an error on bad
5636 /* All of the above is setup for this call. Yikes. */
5637 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5639 /* Done, clean up. */
5640 if (free_cu_cleanup
!= NULL
)
5644 /* We've successfully allocated this compilation unit. Let our
5645 caller clean it up when finished with it. */
5646 discard_cleanups (free_cu_cleanup
);
5648 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5649 So we have to manually free the abbrev table. */
5650 dwarf2_free_abbrev_table (cu
);
5652 /* Link this CU into read_in_chain. */
5653 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5654 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5657 do_cleanups (free_cu_cleanup
);
5660 do_cleanups (cleanups
);
5663 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present.
5664 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed
5665 to have already done the lookup to find the DWO file).
5667 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
5668 THIS_CU->is_debug_types, but nothing else.
5670 We fill in THIS_CU->length.
5672 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5673 linker) then DIE_READER_FUNC will not get called.
5675 THIS_CU->cu is always freed when done.
5676 This is done in order to not leave THIS_CU->cu in a state where we have
5677 to care whether it refers to the "main" CU or the DWO CU. */
5680 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
5681 struct dwo_file
*dwo_file
,
5682 die_reader_func_ftype
*die_reader_func
,
5685 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5686 struct dwarf2_section_info
*section
= this_cu
->section
;
5687 bfd
*abfd
= get_section_bfd_owner (section
);
5688 struct dwarf2_section_info
*abbrev_section
;
5689 struct dwarf2_cu cu
;
5690 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5691 struct die_reader_specs reader
;
5692 struct cleanup
*cleanups
;
5693 struct die_info
*comp_unit_die
;
5696 if (dwarf_die_debug
)
5697 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5698 this_cu
->is_debug_types
? "type" : "comp",
5699 this_cu
->offset
.sect_off
);
5701 gdb_assert (this_cu
->cu
== NULL
);
5703 abbrev_section
= (dwo_file
!= NULL
5704 ? &dwo_file
->sections
.abbrev
5705 : get_abbrev_section_for_cu (this_cu
));
5707 /* This is cheap if the section is already read in. */
5708 dwarf2_read_section (objfile
, section
);
5710 init_one_comp_unit (&cu
, this_cu
);
5712 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
5714 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
5715 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, section
,
5716 abbrev_section
, info_ptr
,
5717 this_cu
->is_debug_types
);
5719 this_cu
->length
= get_cu_length (&cu
.header
);
5721 /* Skip dummy compilation units. */
5722 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5723 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5725 do_cleanups (cleanups
);
5729 dwarf2_read_abbrevs (&cu
, abbrev_section
);
5730 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
5732 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
);
5733 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5735 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5737 do_cleanups (cleanups
);
5740 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
5741 does not lookup the specified DWO file.
5742 This cannot be used to read DWO files.
5744 THIS_CU->cu is always freed when done.
5745 This is done in order to not leave THIS_CU->cu in a state where we have
5746 to care whether it refers to the "main" CU or the DWO CU.
5747 We can revisit this if the data shows there's a performance issue. */
5750 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
5751 die_reader_func_ftype
*die_reader_func
,
5754 init_cutu_and_read_dies_no_follow (this_cu
, NULL
, die_reader_func
, data
);
5757 /* Type Unit Groups.
5759 Type Unit Groups are a way to collapse the set of all TUs (type units) into
5760 a more manageable set. The grouping is done by DW_AT_stmt_list entry
5761 so that all types coming from the same compilation (.o file) are grouped
5762 together. A future step could be to put the types in the same symtab as
5763 the CU the types ultimately came from. */
5766 hash_type_unit_group (const void *item
)
5768 const struct type_unit_group
*tu_group
5769 = (const struct type_unit_group
*) item
;
5771 return hash_stmt_list_entry (&tu_group
->hash
);
5775 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
5777 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
5778 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
5780 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
5783 /* Allocate a hash table for type unit groups. */
5786 allocate_type_unit_groups_table (void)
5788 return htab_create_alloc_ex (3,
5789 hash_type_unit_group
,
5792 &dwarf2_per_objfile
->objfile
->objfile_obstack
,
5793 hashtab_obstack_allocate
,
5794 dummy_obstack_deallocate
);
5797 /* Type units that don't have DW_AT_stmt_list are grouped into their own
5798 partial symtabs. We combine several TUs per psymtab to not let the size
5799 of any one psymtab grow too big. */
5800 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
5801 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
5803 /* Helper routine for get_type_unit_group.
5804 Create the type_unit_group object used to hold one or more TUs. */
5806 static struct type_unit_group
*
5807 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
5809 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5810 struct dwarf2_per_cu_data
*per_cu
;
5811 struct type_unit_group
*tu_group
;
5813 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5814 struct type_unit_group
);
5815 per_cu
= &tu_group
->per_cu
;
5816 per_cu
->objfile
= objfile
;
5818 if (dwarf2_per_objfile
->using_index
)
5820 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5821 struct dwarf2_per_cu_quick_data
);
5825 unsigned int line_offset
= line_offset_struct
.sect_off
;
5826 struct partial_symtab
*pst
;
5829 /* Give the symtab a useful name for debug purposes. */
5830 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
5831 name
= xstrprintf ("<type_units_%d>",
5832 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
5834 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
5836 pst
= create_partial_symtab (per_cu
, name
);
5842 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
5843 tu_group
->hash
.line_offset
= line_offset_struct
;
5848 /* Look up the type_unit_group for type unit CU, and create it if necessary.
5849 STMT_LIST is a DW_AT_stmt_list attribute. */
5851 static struct type_unit_group
*
5852 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
5854 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
5855 struct type_unit_group
*tu_group
;
5857 unsigned int line_offset
;
5858 struct type_unit_group type_unit_group_for_lookup
;
5860 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
5862 dwarf2_per_objfile
->type_unit_groups
=
5863 allocate_type_unit_groups_table ();
5866 /* Do we need to create a new group, or can we use an existing one? */
5870 line_offset
= DW_UNSND (stmt_list
);
5871 ++tu_stats
->nr_symtab_sharers
;
5875 /* Ugh, no stmt_list. Rare, but we have to handle it.
5876 We can do various things here like create one group per TU or
5877 spread them over multiple groups to split up the expansion work.
5878 To avoid worst case scenarios (too many groups or too large groups)
5879 we, umm, group them in bunches. */
5880 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
5881 | (tu_stats
->nr_stmt_less_type_units
5882 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
5883 ++tu_stats
->nr_stmt_less_type_units
;
5886 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
5887 type_unit_group_for_lookup
.hash
.line_offset
.sect_off
= line_offset
;
5888 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
5889 &type_unit_group_for_lookup
, INSERT
);
5892 tu_group
= (struct type_unit_group
*) *slot
;
5893 gdb_assert (tu_group
!= NULL
);
5897 sect_offset line_offset_struct
;
5899 line_offset_struct
.sect_off
= line_offset
;
5900 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
5902 ++tu_stats
->nr_symtabs
;
5908 /* Partial symbol tables. */
5910 /* Create a psymtab named NAME and assign it to PER_CU.
5912 The caller must fill in the following details:
5913 dirname, textlow, texthigh. */
5915 static struct partial_symtab
*
5916 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
5918 struct objfile
*objfile
= per_cu
->objfile
;
5919 struct partial_symtab
*pst
;
5921 pst
= start_psymtab_common (objfile
, name
, 0,
5922 objfile
->global_psymbols
.next
,
5923 objfile
->static_psymbols
.next
);
5925 pst
->psymtabs_addrmap_supported
= 1;
5927 /* This is the glue that links PST into GDB's symbol API. */
5928 pst
->read_symtab_private
= per_cu
;
5929 pst
->read_symtab
= dwarf2_read_symtab
;
5930 per_cu
->v
.psymtab
= pst
;
5935 /* The DATA object passed to process_psymtab_comp_unit_reader has this
5938 struct process_psymtab_comp_unit_data
5940 /* True if we are reading a DW_TAG_partial_unit. */
5942 int want_partial_unit
;
5944 /* The "pretend" language that is used if the CU doesn't declare a
5947 enum language pretend_language
;
5950 /* die_reader_func for process_psymtab_comp_unit. */
5953 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
5954 const gdb_byte
*info_ptr
,
5955 struct die_info
*comp_unit_die
,
5959 struct dwarf2_cu
*cu
= reader
->cu
;
5960 struct objfile
*objfile
= cu
->objfile
;
5961 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
5962 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
5964 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
5965 struct partial_symtab
*pst
;
5966 enum pc_bounds_kind cu_bounds_kind
;
5967 const char *filename
;
5968 struct process_psymtab_comp_unit_data
*info
5969 = (struct process_psymtab_comp_unit_data
*) data
;
5971 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !info
->want_partial_unit
)
5974 gdb_assert (! per_cu
->is_debug_types
);
5976 prepare_one_comp_unit (cu
, comp_unit_die
, info
->pretend_language
);
5978 cu
->list_in_scope
= &file_symbols
;
5980 /* Allocate a new partial symbol table structure. */
5981 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
5982 if (filename
== NULL
)
5985 pst
= create_partial_symtab (per_cu
, filename
);
5987 /* This must be done before calling dwarf2_build_include_psymtabs. */
5988 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
5990 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5992 dwarf2_find_base_address (comp_unit_die
, cu
);
5994 /* Possibly set the default values of LOWPC and HIGHPC from
5996 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
5997 &best_highpc
, cu
, pst
);
5998 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
5999 /* Store the contiguous range if it is not empty; it can be empty for
6000 CUs with no code. */
6001 addrmap_set_empty (objfile
->psymtabs_addrmap
,
6002 gdbarch_adjust_dwarf2_addr (gdbarch
,
6003 best_lowpc
+ baseaddr
),
6004 gdbarch_adjust_dwarf2_addr (gdbarch
,
6005 best_highpc
+ baseaddr
) - 1,
6008 /* Check if comp unit has_children.
6009 If so, read the rest of the partial symbols from this comp unit.
6010 If not, there's no more debug_info for this comp unit. */
6013 struct partial_die_info
*first_die
;
6014 CORE_ADDR lowpc
, highpc
;
6016 lowpc
= ((CORE_ADDR
) -1);
6017 highpc
= ((CORE_ADDR
) 0);
6019 first_die
= load_partial_dies (reader
, info_ptr
, 1);
6021 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
6022 cu_bounds_kind
== PC_BOUNDS_NOT_PRESENT
, cu
);
6024 /* If we didn't find a lowpc, set it to highpc to avoid
6025 complaints from `maint check'. */
6026 if (lowpc
== ((CORE_ADDR
) -1))
6029 /* If the compilation unit didn't have an explicit address range,
6030 then use the information extracted from its child dies. */
6031 if (cu_bounds_kind
== PC_BOUNDS_NOT_PRESENT
)
6034 best_highpc
= highpc
;
6037 pst
->textlow
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
);
6038 pst
->texthigh
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
);
6040 end_psymtab_common (objfile
, pst
);
6042 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
6045 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
6046 struct dwarf2_per_cu_data
*iter
;
6048 /* Fill in 'dependencies' here; we fill in 'users' in a
6050 pst
->number_of_dependencies
= len
;
6052 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
6054 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
6057 pst
->dependencies
[i
] = iter
->v
.psymtab
;
6059 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
6062 /* Get the list of files included in the current compilation unit,
6063 and build a psymtab for each of them. */
6064 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
6066 if (dwarf_read_debug
)
6068 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6070 fprintf_unfiltered (gdb_stdlog
,
6071 "Psymtab for %s unit @0x%x: %s - %s"
6072 ", %d global, %d static syms\n",
6073 per_cu
->is_debug_types
? "type" : "comp",
6074 per_cu
->offset
.sect_off
,
6075 paddress (gdbarch
, pst
->textlow
),
6076 paddress (gdbarch
, pst
->texthigh
),
6077 pst
->n_global_syms
, pst
->n_static_syms
);
6081 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6082 Process compilation unit THIS_CU for a psymtab. */
6085 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
6086 int want_partial_unit
,
6087 enum language pretend_language
)
6089 struct process_psymtab_comp_unit_data info
;
6091 /* If this compilation unit was already read in, free the
6092 cached copy in order to read it in again. This is
6093 necessary because we skipped some symbols when we first
6094 read in the compilation unit (see load_partial_dies).
6095 This problem could be avoided, but the benefit is unclear. */
6096 if (this_cu
->cu
!= NULL
)
6097 free_one_cached_comp_unit (this_cu
);
6099 gdb_assert (! this_cu
->is_debug_types
);
6100 info
.want_partial_unit
= want_partial_unit
;
6101 info
.pretend_language
= pretend_language
;
6102 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0,
6103 process_psymtab_comp_unit_reader
,
6106 /* Age out any secondary CUs. */
6107 age_cached_comp_units ();
6110 /* Reader function for build_type_psymtabs. */
6113 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
6114 const gdb_byte
*info_ptr
,
6115 struct die_info
*type_unit_die
,
6119 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6120 struct dwarf2_cu
*cu
= reader
->cu
;
6121 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
6122 struct signatured_type
*sig_type
;
6123 struct type_unit_group
*tu_group
;
6124 struct attribute
*attr
;
6125 struct partial_die_info
*first_die
;
6126 CORE_ADDR lowpc
, highpc
;
6127 struct partial_symtab
*pst
;
6129 gdb_assert (data
== NULL
);
6130 gdb_assert (per_cu
->is_debug_types
);
6131 sig_type
= (struct signatured_type
*) per_cu
;
6136 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
6137 tu_group
= get_type_unit_group (cu
, attr
);
6139 VEC_safe_push (sig_type_ptr
, tu_group
->tus
, sig_type
);
6141 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
6142 cu
->list_in_scope
= &file_symbols
;
6143 pst
= create_partial_symtab (per_cu
, "");
6146 first_die
= load_partial_dies (reader
, info_ptr
, 1);
6148 lowpc
= (CORE_ADDR
) -1;
6149 highpc
= (CORE_ADDR
) 0;
6150 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
6152 end_psymtab_common (objfile
, pst
);
6155 /* Struct used to sort TUs by their abbreviation table offset. */
6157 struct tu_abbrev_offset
6159 struct signatured_type
*sig_type
;
6160 sect_offset abbrev_offset
;
6163 /* Helper routine for build_type_psymtabs_1, passed to qsort. */
6166 sort_tu_by_abbrev_offset (const void *ap
, const void *bp
)
6168 const struct tu_abbrev_offset
* const *a
6169 = (const struct tu_abbrev_offset
* const*) ap
;
6170 const struct tu_abbrev_offset
* const *b
6171 = (const struct tu_abbrev_offset
* const*) bp
;
6172 unsigned int aoff
= (*a
)->abbrev_offset
.sect_off
;
6173 unsigned int boff
= (*b
)->abbrev_offset
.sect_off
;
6175 return (aoff
> boff
) - (aoff
< boff
);
6178 /* Efficiently read all the type units.
6179 This does the bulk of the work for build_type_psymtabs.
6181 The efficiency is because we sort TUs by the abbrev table they use and
6182 only read each abbrev table once. In one program there are 200K TUs
6183 sharing 8K abbrev tables.
6185 The main purpose of this function is to support building the
6186 dwarf2_per_objfile->type_unit_groups table.
6187 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
6188 can collapse the search space by grouping them by stmt_list.
6189 The savings can be significant, in the same program from above the 200K TUs
6190 share 8K stmt_list tables.
6192 FUNC is expected to call get_type_unit_group, which will create the
6193 struct type_unit_group if necessary and add it to
6194 dwarf2_per_objfile->type_unit_groups. */
6197 build_type_psymtabs_1 (void)
6199 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6200 struct cleanup
*cleanups
;
6201 struct abbrev_table
*abbrev_table
;
6202 sect_offset abbrev_offset
;
6203 struct tu_abbrev_offset
*sorted_by_abbrev
;
6206 /* It's up to the caller to not call us multiple times. */
6207 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
6209 if (dwarf2_per_objfile
->n_type_units
== 0)
6212 /* TUs typically share abbrev tables, and there can be way more TUs than
6213 abbrev tables. Sort by abbrev table to reduce the number of times we
6214 read each abbrev table in.
6215 Alternatives are to punt or to maintain a cache of abbrev tables.
6216 This is simpler and efficient enough for now.
6218 Later we group TUs by their DW_AT_stmt_list value (as this defines the
6219 symtab to use). Typically TUs with the same abbrev offset have the same
6220 stmt_list value too so in practice this should work well.
6222 The basic algorithm here is:
6224 sort TUs by abbrev table
6225 for each TU with same abbrev table:
6226 read abbrev table if first user
6227 read TU top level DIE
6228 [IWBN if DWO skeletons had DW_AT_stmt_list]
6231 if (dwarf_read_debug
)
6232 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
6234 /* Sort in a separate table to maintain the order of all_type_units
6235 for .gdb_index: TU indices directly index all_type_units. */
6236 sorted_by_abbrev
= XNEWVEC (struct tu_abbrev_offset
,
6237 dwarf2_per_objfile
->n_type_units
);
6238 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6240 struct signatured_type
*sig_type
= dwarf2_per_objfile
->all_type_units
[i
];
6242 sorted_by_abbrev
[i
].sig_type
= sig_type
;
6243 sorted_by_abbrev
[i
].abbrev_offset
=
6244 read_abbrev_offset (sig_type
->per_cu
.section
,
6245 sig_type
->per_cu
.offset
);
6247 cleanups
= make_cleanup (xfree
, sorted_by_abbrev
);
6248 qsort (sorted_by_abbrev
, dwarf2_per_objfile
->n_type_units
,
6249 sizeof (struct tu_abbrev_offset
), sort_tu_by_abbrev_offset
);
6251 abbrev_offset
.sect_off
= ~(unsigned) 0;
6252 abbrev_table
= NULL
;
6253 make_cleanup (abbrev_table_free_cleanup
, &abbrev_table
);
6255 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6257 const struct tu_abbrev_offset
*tu
= &sorted_by_abbrev
[i
];
6259 /* Switch to the next abbrev table if necessary. */
6260 if (abbrev_table
== NULL
6261 || tu
->abbrev_offset
.sect_off
!= abbrev_offset
.sect_off
)
6263 if (abbrev_table
!= NULL
)
6265 abbrev_table_free (abbrev_table
);
6266 /* Reset to NULL in case abbrev_table_read_table throws
6267 an error: abbrev_table_free_cleanup will get called. */
6268 abbrev_table
= NULL
;
6270 abbrev_offset
= tu
->abbrev_offset
;
6272 abbrev_table_read_table (&dwarf2_per_objfile
->abbrev
,
6274 ++tu_stats
->nr_uniq_abbrev_tables
;
6277 init_cutu_and_read_dies (&tu
->sig_type
->per_cu
, abbrev_table
, 0, 0,
6278 build_type_psymtabs_reader
, NULL
);
6281 do_cleanups (cleanups
);
6284 /* Print collected type unit statistics. */
6287 print_tu_stats (void)
6289 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6291 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
6292 fprintf_unfiltered (gdb_stdlog
, " %d TUs\n",
6293 dwarf2_per_objfile
->n_type_units
);
6294 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
6295 tu_stats
->nr_uniq_abbrev_tables
);
6296 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
6297 tu_stats
->nr_symtabs
);
6298 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
6299 tu_stats
->nr_symtab_sharers
);
6300 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
6301 tu_stats
->nr_stmt_less_type_units
);
6302 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
6303 tu_stats
->nr_all_type_units_reallocs
);
6306 /* Traversal function for build_type_psymtabs. */
6309 build_type_psymtab_dependencies (void **slot
, void *info
)
6311 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6312 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
6313 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
6314 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6315 int len
= VEC_length (sig_type_ptr
, tu_group
->tus
);
6316 struct signatured_type
*iter
;
6319 gdb_assert (len
> 0);
6320 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
6322 pst
->number_of_dependencies
= len
;
6324 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
6326 VEC_iterate (sig_type_ptr
, tu_group
->tus
, i
, iter
);
6329 gdb_assert (iter
->per_cu
.is_debug_types
);
6330 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
6331 iter
->type_unit_group
= tu_group
;
6334 VEC_free (sig_type_ptr
, tu_group
->tus
);
6339 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6340 Build partial symbol tables for the .debug_types comp-units. */
6343 build_type_psymtabs (struct objfile
*objfile
)
6345 if (! create_all_type_units (objfile
))
6348 build_type_psymtabs_1 ();
6351 /* Traversal function for process_skeletonless_type_unit.
6352 Read a TU in a DWO file and build partial symbols for it. */
6355 process_skeletonless_type_unit (void **slot
, void *info
)
6357 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
6358 struct objfile
*objfile
= (struct objfile
*) info
;
6359 struct signatured_type find_entry
, *entry
;
6361 /* If this TU doesn't exist in the global table, add it and read it in. */
6363 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6365 dwarf2_per_objfile
->signatured_types
6366 = allocate_signatured_type_table (objfile
);
6369 find_entry
.signature
= dwo_unit
->signature
;
6370 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
, &find_entry
,
6372 /* If we've already seen this type there's nothing to do. What's happening
6373 is we're doing our own version of comdat-folding here. */
6377 /* This does the job that create_all_type_units would have done for
6379 entry
= add_type_unit (dwo_unit
->signature
, slot
);
6380 fill_in_sig_entry_from_dwo_entry (objfile
, entry
, dwo_unit
);
6383 /* This does the job that build_type_psymtabs_1 would have done. */
6384 init_cutu_and_read_dies (&entry
->per_cu
, NULL
, 0, 0,
6385 build_type_psymtabs_reader
, NULL
);
6390 /* Traversal function for process_skeletonless_type_units. */
6393 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
6395 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
6397 if (dwo_file
->tus
!= NULL
)
6399 htab_traverse_noresize (dwo_file
->tus
,
6400 process_skeletonless_type_unit
, info
);
6406 /* Scan all TUs of DWO files, verifying we've processed them.
6407 This is needed in case a TU was emitted without its skeleton.
6408 Note: This can't be done until we know what all the DWO files are. */
6411 process_skeletonless_type_units (struct objfile
*objfile
)
6413 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
6414 if (get_dwp_file () == NULL
6415 && dwarf2_per_objfile
->dwo_files
!= NULL
)
6417 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
,
6418 process_dwo_file_for_skeletonless_type_units
,
6423 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
6426 psymtabs_addrmap_cleanup (void *o
)
6428 struct objfile
*objfile
= (struct objfile
*) o
;
6430 objfile
->psymtabs_addrmap
= NULL
;
6433 /* Compute the 'user' field for each psymtab in OBJFILE. */
6436 set_partial_user (struct objfile
*objfile
)
6440 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6442 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6443 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6449 for (j
= 0; j
< pst
->number_of_dependencies
; ++j
)
6451 /* Set the 'user' field only if it is not already set. */
6452 if (pst
->dependencies
[j
]->user
== NULL
)
6453 pst
->dependencies
[j
]->user
= pst
;
6458 /* Build the partial symbol table by doing a quick pass through the
6459 .debug_info and .debug_abbrev sections. */
6462 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
6464 struct cleanup
*back_to
, *addrmap_cleanup
;
6465 struct obstack temp_obstack
;
6468 if (dwarf_read_debug
)
6470 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
6471 objfile_name (objfile
));
6474 dwarf2_per_objfile
->reading_partial_symbols
= 1;
6476 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
6478 /* Any cached compilation units will be linked by the per-objfile
6479 read_in_chain. Make sure to free them when we're done. */
6480 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
6482 build_type_psymtabs (objfile
);
6484 create_all_comp_units (objfile
);
6486 /* Create a temporary address map on a temporary obstack. We later
6487 copy this to the final obstack. */
6488 obstack_init (&temp_obstack
);
6489 make_cleanup_obstack_free (&temp_obstack
);
6490 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
6491 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
6493 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6495 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6497 process_psymtab_comp_unit (per_cu
, 0, language_minimal
);
6500 /* This has to wait until we read the CUs, we need the list of DWOs. */
6501 process_skeletonless_type_units (objfile
);
6503 /* Now that all TUs have been processed we can fill in the dependencies. */
6504 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
6506 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
6507 build_type_psymtab_dependencies
, NULL
);
6510 if (dwarf_read_debug
)
6513 set_partial_user (objfile
);
6515 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
6516 &objfile
->objfile_obstack
);
6517 discard_cleanups (addrmap_cleanup
);
6519 do_cleanups (back_to
);
6521 if (dwarf_read_debug
)
6522 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
6523 objfile_name (objfile
));
6526 /* die_reader_func for load_partial_comp_unit. */
6529 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
6530 const gdb_byte
*info_ptr
,
6531 struct die_info
*comp_unit_die
,
6535 struct dwarf2_cu
*cu
= reader
->cu
;
6537 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
6539 /* Check if comp unit has_children.
6540 If so, read the rest of the partial symbols from this comp unit.
6541 If not, there's no more debug_info for this comp unit. */
6543 load_partial_dies (reader
, info_ptr
, 0);
6546 /* Load the partial DIEs for a secondary CU into memory.
6547 This is also used when rereading a primary CU with load_all_dies. */
6550 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
6552 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
6553 load_partial_comp_unit_reader
, NULL
);
6557 read_comp_units_from_section (struct objfile
*objfile
,
6558 struct dwarf2_section_info
*section
,
6559 unsigned int is_dwz
,
6562 struct dwarf2_per_cu_data
***all_comp_units
)
6564 const gdb_byte
*info_ptr
;
6565 bfd
*abfd
= get_section_bfd_owner (section
);
6567 if (dwarf_read_debug
)
6568 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
6569 get_section_name (section
),
6570 get_section_file_name (section
));
6572 dwarf2_read_section (objfile
, section
);
6574 info_ptr
= section
->buffer
;
6576 while (info_ptr
< section
->buffer
+ section
->size
)
6578 unsigned int length
, initial_length_size
;
6579 struct dwarf2_per_cu_data
*this_cu
;
6582 offset
.sect_off
= info_ptr
- section
->buffer
;
6584 /* Read just enough information to find out where the next
6585 compilation unit is. */
6586 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6588 /* Save the compilation unit for later lookup. */
6589 this_cu
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_per_cu_data
);
6590 memset (this_cu
, 0, sizeof (*this_cu
));
6591 this_cu
->offset
= offset
;
6592 this_cu
->length
= length
+ initial_length_size
;
6593 this_cu
->is_dwz
= is_dwz
;
6594 this_cu
->objfile
= objfile
;
6595 this_cu
->section
= section
;
6597 if (*n_comp_units
== *n_allocated
)
6600 *all_comp_units
= XRESIZEVEC (struct dwarf2_per_cu_data
*,
6601 *all_comp_units
, *n_allocated
);
6603 (*all_comp_units
)[*n_comp_units
] = this_cu
;
6606 info_ptr
= info_ptr
+ this_cu
->length
;
6610 /* Create a list of all compilation units in OBJFILE.
6611 This is only done for -readnow and building partial symtabs. */
6614 create_all_comp_units (struct objfile
*objfile
)
6618 struct dwarf2_per_cu_data
**all_comp_units
;
6619 struct dwz_file
*dwz
;
6623 all_comp_units
= XNEWVEC (struct dwarf2_per_cu_data
*, n_allocated
);
6625 read_comp_units_from_section (objfile
, &dwarf2_per_objfile
->info
, 0,
6626 &n_allocated
, &n_comp_units
, &all_comp_units
);
6628 dwz
= dwarf2_get_dwz_file ();
6630 read_comp_units_from_section (objfile
, &dwz
->info
, 1,
6631 &n_allocated
, &n_comp_units
,
6634 dwarf2_per_objfile
->all_comp_units
= XOBNEWVEC (&objfile
->objfile_obstack
,
6635 struct dwarf2_per_cu_data
*,
6637 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
6638 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
6639 xfree (all_comp_units
);
6640 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
6643 /* Process all loaded DIEs for compilation unit CU, starting at
6644 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
6645 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
6646 DW_AT_ranges). See the comments of add_partial_subprogram on how
6647 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
6650 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
6651 CORE_ADDR
*highpc
, int set_addrmap
,
6652 struct dwarf2_cu
*cu
)
6654 struct partial_die_info
*pdi
;
6656 /* Now, march along the PDI's, descending into ones which have
6657 interesting children but skipping the children of the other ones,
6658 until we reach the end of the compilation unit. */
6664 fixup_partial_die (pdi
, cu
);
6666 /* Anonymous namespaces or modules have no name but have interesting
6667 children, so we need to look at them. Ditto for anonymous
6670 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
6671 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
6672 || pdi
->tag
== DW_TAG_imported_unit
)
6676 case DW_TAG_subprogram
:
6677 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6679 case DW_TAG_constant
:
6680 case DW_TAG_variable
:
6681 case DW_TAG_typedef
:
6682 case DW_TAG_union_type
:
6683 if (!pdi
->is_declaration
)
6685 add_partial_symbol (pdi
, cu
);
6688 case DW_TAG_class_type
:
6689 case DW_TAG_interface_type
:
6690 case DW_TAG_structure_type
:
6691 if (!pdi
->is_declaration
)
6693 add_partial_symbol (pdi
, cu
);
6696 case DW_TAG_enumeration_type
:
6697 if (!pdi
->is_declaration
)
6698 add_partial_enumeration (pdi
, cu
);
6700 case DW_TAG_base_type
:
6701 case DW_TAG_subrange_type
:
6702 /* File scope base type definitions are added to the partial
6704 add_partial_symbol (pdi
, cu
);
6706 case DW_TAG_namespace
:
6707 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6710 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6712 case DW_TAG_imported_unit
:
6714 struct dwarf2_per_cu_data
*per_cu
;
6716 /* For now we don't handle imported units in type units. */
6717 if (cu
->per_cu
->is_debug_types
)
6719 error (_("Dwarf Error: DW_TAG_imported_unit is not"
6720 " supported in type units [in module %s]"),
6721 objfile_name (cu
->objfile
));
6724 per_cu
= dwarf2_find_containing_comp_unit (pdi
->d
.offset
,
6728 /* Go read the partial unit, if needed. */
6729 if (per_cu
->v
.psymtab
== NULL
)
6730 process_psymtab_comp_unit (per_cu
, 1, cu
->language
);
6732 VEC_safe_push (dwarf2_per_cu_ptr
,
6733 cu
->per_cu
->imported_symtabs
, per_cu
);
6736 case DW_TAG_imported_declaration
:
6737 add_partial_symbol (pdi
, cu
);
6744 /* If the die has a sibling, skip to the sibling. */
6746 pdi
= pdi
->die_sibling
;
6750 /* Functions used to compute the fully scoped name of a partial DIE.
6752 Normally, this is simple. For C++, the parent DIE's fully scoped
6753 name is concatenated with "::" and the partial DIE's name. For
6754 Java, the same thing occurs except that "." is used instead of "::".
6755 Enumerators are an exception; they use the scope of their parent
6756 enumeration type, i.e. the name of the enumeration type is not
6757 prepended to the enumerator.
6759 There are two complexities. One is DW_AT_specification; in this
6760 case "parent" means the parent of the target of the specification,
6761 instead of the direct parent of the DIE. The other is compilers
6762 which do not emit DW_TAG_namespace; in this case we try to guess
6763 the fully qualified name of structure types from their members'
6764 linkage names. This must be done using the DIE's children rather
6765 than the children of any DW_AT_specification target. We only need
6766 to do this for structures at the top level, i.e. if the target of
6767 any DW_AT_specification (if any; otherwise the DIE itself) does not
6770 /* Compute the scope prefix associated with PDI's parent, in
6771 compilation unit CU. The result will be allocated on CU's
6772 comp_unit_obstack, or a copy of the already allocated PDI->NAME
6773 field. NULL is returned if no prefix is necessary. */
6775 partial_die_parent_scope (struct partial_die_info
*pdi
,
6776 struct dwarf2_cu
*cu
)
6778 const char *grandparent_scope
;
6779 struct partial_die_info
*parent
, *real_pdi
;
6781 /* We need to look at our parent DIE; if we have a DW_AT_specification,
6782 then this means the parent of the specification DIE. */
6785 while (real_pdi
->has_specification
)
6786 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
6787 real_pdi
->spec_is_dwz
, cu
);
6789 parent
= real_pdi
->die_parent
;
6793 if (parent
->scope_set
)
6794 return parent
->scope
;
6796 fixup_partial_die (parent
, cu
);
6798 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
6800 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
6801 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
6802 Work around this problem here. */
6803 if (cu
->language
== language_cplus
6804 && parent
->tag
== DW_TAG_namespace
6805 && strcmp (parent
->name
, "::") == 0
6806 && grandparent_scope
== NULL
)
6808 parent
->scope
= NULL
;
6809 parent
->scope_set
= 1;
6813 if (pdi
->tag
== DW_TAG_enumerator
)
6814 /* Enumerators should not get the name of the enumeration as a prefix. */
6815 parent
->scope
= grandparent_scope
;
6816 else if (parent
->tag
== DW_TAG_namespace
6817 || parent
->tag
== DW_TAG_module
6818 || parent
->tag
== DW_TAG_structure_type
6819 || parent
->tag
== DW_TAG_class_type
6820 || parent
->tag
== DW_TAG_interface_type
6821 || parent
->tag
== DW_TAG_union_type
6822 || parent
->tag
== DW_TAG_enumeration_type
)
6824 if (grandparent_scope
== NULL
)
6825 parent
->scope
= parent
->name
;
6827 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
6829 parent
->name
, 0, cu
);
6833 /* FIXME drow/2004-04-01: What should we be doing with
6834 function-local names? For partial symbols, we should probably be
6836 complaint (&symfile_complaints
,
6837 _("unhandled containing DIE tag %d for DIE at %d"),
6838 parent
->tag
, pdi
->offset
.sect_off
);
6839 parent
->scope
= grandparent_scope
;
6842 parent
->scope_set
= 1;
6843 return parent
->scope
;
6846 /* Return the fully scoped name associated with PDI, from compilation unit
6847 CU. The result will be allocated with malloc. */
6850 partial_die_full_name (struct partial_die_info
*pdi
,
6851 struct dwarf2_cu
*cu
)
6853 const char *parent_scope
;
6855 /* If this is a template instantiation, we can not work out the
6856 template arguments from partial DIEs. So, unfortunately, we have
6857 to go through the full DIEs. At least any work we do building
6858 types here will be reused if full symbols are loaded later. */
6859 if (pdi
->has_template_arguments
)
6861 fixup_partial_die (pdi
, cu
);
6863 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
6865 struct die_info
*die
;
6866 struct attribute attr
;
6867 struct dwarf2_cu
*ref_cu
= cu
;
6869 /* DW_FORM_ref_addr is using section offset. */
6870 attr
.name
= (enum dwarf_attribute
) 0;
6871 attr
.form
= DW_FORM_ref_addr
;
6872 attr
.u
.unsnd
= pdi
->offset
.sect_off
;
6873 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
6875 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
6879 parent_scope
= partial_die_parent_scope (pdi
, cu
);
6880 if (parent_scope
== NULL
)
6883 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
6887 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
6889 struct objfile
*objfile
= cu
->objfile
;
6890 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6892 const char *actual_name
= NULL
;
6894 char *built_actual_name
;
6896 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6898 built_actual_name
= partial_die_full_name (pdi
, cu
);
6899 if (built_actual_name
!= NULL
)
6900 actual_name
= built_actual_name
;
6902 if (actual_name
== NULL
)
6903 actual_name
= pdi
->name
;
6907 case DW_TAG_subprogram
:
6908 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
);
6909 if (pdi
->is_external
|| cu
->language
== language_ada
)
6911 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
6912 of the global scope. But in Ada, we want to be able to access
6913 nested procedures globally. So all Ada subprograms are stored
6914 in the global scope. */
6915 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6916 built_actual_name
!= NULL
,
6917 VAR_DOMAIN
, LOC_BLOCK
,
6918 &objfile
->global_psymbols
,
6919 addr
, cu
->language
, objfile
);
6923 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6924 built_actual_name
!= NULL
,
6925 VAR_DOMAIN
, LOC_BLOCK
,
6926 &objfile
->static_psymbols
,
6927 addr
, cu
->language
, objfile
);
6930 case DW_TAG_constant
:
6932 struct psymbol_allocation_list
*list
;
6934 if (pdi
->is_external
)
6935 list
= &objfile
->global_psymbols
;
6937 list
= &objfile
->static_psymbols
;
6938 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6939 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
6940 list
, 0, cu
->language
, objfile
);
6943 case DW_TAG_variable
:
6945 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
6949 && !dwarf2_per_objfile
->has_section_at_zero
)
6951 /* A global or static variable may also have been stripped
6952 out by the linker if unused, in which case its address
6953 will be nullified; do not add such variables into partial
6954 symbol table then. */
6956 else if (pdi
->is_external
)
6959 Don't enter into the minimal symbol tables as there is
6960 a minimal symbol table entry from the ELF symbols already.
6961 Enter into partial symbol table if it has a location
6962 descriptor or a type.
6963 If the location descriptor is missing, new_symbol will create
6964 a LOC_UNRESOLVED symbol, the address of the variable will then
6965 be determined from the minimal symbol table whenever the variable
6967 The address for the partial symbol table entry is not
6968 used by GDB, but it comes in handy for debugging partial symbol
6971 if (pdi
->d
.locdesc
|| pdi
->has_type
)
6972 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6973 built_actual_name
!= NULL
,
6974 VAR_DOMAIN
, LOC_STATIC
,
6975 &objfile
->global_psymbols
,
6977 cu
->language
, objfile
);
6981 int has_loc
= pdi
->d
.locdesc
!= NULL
;
6983 /* Static Variable. Skip symbols whose value we cannot know (those
6984 without location descriptors or constant values). */
6985 if (!has_loc
&& !pdi
->has_const_value
)
6987 xfree (built_actual_name
);
6991 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6992 built_actual_name
!= NULL
,
6993 VAR_DOMAIN
, LOC_STATIC
,
6994 &objfile
->static_psymbols
,
6995 has_loc
? addr
+ baseaddr
: (CORE_ADDR
) 0,
6996 cu
->language
, objfile
);
6999 case DW_TAG_typedef
:
7000 case DW_TAG_base_type
:
7001 case DW_TAG_subrange_type
:
7002 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7003 built_actual_name
!= NULL
,
7004 VAR_DOMAIN
, LOC_TYPEDEF
,
7005 &objfile
->static_psymbols
,
7006 0, cu
->language
, objfile
);
7008 case DW_TAG_imported_declaration
:
7009 case DW_TAG_namespace
:
7010 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7011 built_actual_name
!= NULL
,
7012 VAR_DOMAIN
, LOC_TYPEDEF
,
7013 &objfile
->global_psymbols
,
7014 0, cu
->language
, objfile
);
7017 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7018 built_actual_name
!= NULL
,
7019 MODULE_DOMAIN
, LOC_TYPEDEF
,
7020 &objfile
->global_psymbols
,
7021 0, cu
->language
, objfile
);
7023 case DW_TAG_class_type
:
7024 case DW_TAG_interface_type
:
7025 case DW_TAG_structure_type
:
7026 case DW_TAG_union_type
:
7027 case DW_TAG_enumeration_type
:
7028 /* Skip external references. The DWARF standard says in the section
7029 about "Structure, Union, and Class Type Entries": "An incomplete
7030 structure, union or class type is represented by a structure,
7031 union or class entry that does not have a byte size attribute
7032 and that has a DW_AT_declaration attribute." */
7033 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
7035 xfree (built_actual_name
);
7039 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
7040 static vs. global. */
7041 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7042 built_actual_name
!= NULL
,
7043 STRUCT_DOMAIN
, LOC_TYPEDEF
,
7044 (cu
->language
== language_cplus
7045 || cu
->language
== language_java
)
7046 ? &objfile
->global_psymbols
7047 : &objfile
->static_psymbols
,
7048 0, cu
->language
, objfile
);
7051 case DW_TAG_enumerator
:
7052 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7053 built_actual_name
!= NULL
,
7054 VAR_DOMAIN
, LOC_CONST
,
7055 (cu
->language
== language_cplus
7056 || cu
->language
== language_java
)
7057 ? &objfile
->global_psymbols
7058 : &objfile
->static_psymbols
,
7059 0, cu
->language
, objfile
);
7065 xfree (built_actual_name
);
7068 /* Read a partial die corresponding to a namespace; also, add a symbol
7069 corresponding to that namespace to the symbol table. NAMESPACE is
7070 the name of the enclosing namespace. */
7073 add_partial_namespace (struct partial_die_info
*pdi
,
7074 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7075 int set_addrmap
, struct dwarf2_cu
*cu
)
7077 /* Add a symbol for the namespace. */
7079 add_partial_symbol (pdi
, cu
);
7081 /* Now scan partial symbols in that namespace. */
7083 if (pdi
->has_children
)
7084 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7087 /* Read a partial die corresponding to a Fortran module. */
7090 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
7091 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
7093 /* Add a symbol for the namespace. */
7095 add_partial_symbol (pdi
, cu
);
7097 /* Now scan partial symbols in that module. */
7099 if (pdi
->has_children
)
7100 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7103 /* Read a partial die corresponding to a subprogram and create a partial
7104 symbol for that subprogram. When the CU language allows it, this
7105 routine also defines a partial symbol for each nested subprogram
7106 that this subprogram contains. If SET_ADDRMAP is true, record the
7107 covered ranges in the addrmap. Set *LOWPC and *HIGHPC to the lowest
7108 and highest PC values found in PDI.
7110 PDI may also be a lexical block, in which case we simply search
7111 recursively for subprograms defined inside that lexical block.
7112 Again, this is only performed when the CU language allows this
7113 type of definitions. */
7116 add_partial_subprogram (struct partial_die_info
*pdi
,
7117 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7118 int set_addrmap
, struct dwarf2_cu
*cu
)
7120 if (pdi
->tag
== DW_TAG_subprogram
)
7122 if (pdi
->has_pc_info
)
7124 if (pdi
->lowpc
< *lowpc
)
7125 *lowpc
= pdi
->lowpc
;
7126 if (pdi
->highpc
> *highpc
)
7127 *highpc
= pdi
->highpc
;
7130 struct objfile
*objfile
= cu
->objfile
;
7131 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7136 baseaddr
= ANOFFSET (objfile
->section_offsets
,
7137 SECT_OFF_TEXT (objfile
));
7138 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7139 pdi
->lowpc
+ baseaddr
);
7140 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7141 pdi
->highpc
+ baseaddr
);
7142 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
7143 cu
->per_cu
->v
.psymtab
);
7147 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
7149 if (!pdi
->is_declaration
)
7150 /* Ignore subprogram DIEs that do not have a name, they are
7151 illegal. Do not emit a complaint at this point, we will
7152 do so when we convert this psymtab into a symtab. */
7154 add_partial_symbol (pdi
, cu
);
7158 if (! pdi
->has_children
)
7161 if (cu
->language
== language_ada
)
7163 pdi
= pdi
->die_child
;
7166 fixup_partial_die (pdi
, cu
);
7167 if (pdi
->tag
== DW_TAG_subprogram
7168 || pdi
->tag
== DW_TAG_lexical_block
)
7169 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
7170 pdi
= pdi
->die_sibling
;
7175 /* Read a partial die corresponding to an enumeration type. */
7178 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
7179 struct dwarf2_cu
*cu
)
7181 struct partial_die_info
*pdi
;
7183 if (enum_pdi
->name
!= NULL
)
7184 add_partial_symbol (enum_pdi
, cu
);
7186 pdi
= enum_pdi
->die_child
;
7189 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
7190 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
7192 add_partial_symbol (pdi
, cu
);
7193 pdi
= pdi
->die_sibling
;
7197 /* Return the initial uleb128 in the die at INFO_PTR. */
7200 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
7202 unsigned int bytes_read
;
7204 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7207 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
7208 Return the corresponding abbrev, or NULL if the number is zero (indicating
7209 an empty DIE). In either case *BYTES_READ will be set to the length of
7210 the initial number. */
7212 static struct abbrev_info
*
7213 peek_die_abbrev (const gdb_byte
*info_ptr
, unsigned int *bytes_read
,
7214 struct dwarf2_cu
*cu
)
7216 bfd
*abfd
= cu
->objfile
->obfd
;
7217 unsigned int abbrev_number
;
7218 struct abbrev_info
*abbrev
;
7220 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
7222 if (abbrev_number
== 0)
7225 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
7228 error (_("Dwarf Error: Could not find abbrev number %d in %s"
7229 " at offset 0x%x [in module %s]"),
7230 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
7231 cu
->header
.offset
.sect_off
, bfd_get_filename (abfd
));
7237 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7238 Returns a pointer to the end of a series of DIEs, terminated by an empty
7239 DIE. Any children of the skipped DIEs will also be skipped. */
7241 static const gdb_byte
*
7242 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
7244 struct dwarf2_cu
*cu
= reader
->cu
;
7245 struct abbrev_info
*abbrev
;
7246 unsigned int bytes_read
;
7250 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
7252 return info_ptr
+ bytes_read
;
7254 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
7258 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7259 INFO_PTR should point just after the initial uleb128 of a DIE, and the
7260 abbrev corresponding to that skipped uleb128 should be passed in
7261 ABBREV. Returns a pointer to this DIE's sibling, skipping any
7264 static const gdb_byte
*
7265 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
7266 struct abbrev_info
*abbrev
)
7268 unsigned int bytes_read
;
7269 struct attribute attr
;
7270 bfd
*abfd
= reader
->abfd
;
7271 struct dwarf2_cu
*cu
= reader
->cu
;
7272 const gdb_byte
*buffer
= reader
->buffer
;
7273 const gdb_byte
*buffer_end
= reader
->buffer_end
;
7274 unsigned int form
, i
;
7276 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
7278 /* The only abbrev we care about is DW_AT_sibling. */
7279 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
7281 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
7282 if (attr
.form
== DW_FORM_ref_addr
)
7283 complaint (&symfile_complaints
,
7284 _("ignoring absolute DW_AT_sibling"));
7287 unsigned int off
= dwarf2_get_ref_die_offset (&attr
).sect_off
;
7288 const gdb_byte
*sibling_ptr
= buffer
+ off
;
7290 if (sibling_ptr
< info_ptr
)
7291 complaint (&symfile_complaints
,
7292 _("DW_AT_sibling points backwards"));
7293 else if (sibling_ptr
> reader
->buffer_end
)
7294 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
7300 /* If it isn't DW_AT_sibling, skip this attribute. */
7301 form
= abbrev
->attrs
[i
].form
;
7305 case DW_FORM_ref_addr
:
7306 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
7307 and later it is offset sized. */
7308 if (cu
->header
.version
== 2)
7309 info_ptr
+= cu
->header
.addr_size
;
7311 info_ptr
+= cu
->header
.offset_size
;
7313 case DW_FORM_GNU_ref_alt
:
7314 info_ptr
+= cu
->header
.offset_size
;
7317 info_ptr
+= cu
->header
.addr_size
;
7324 case DW_FORM_flag_present
:
7336 case DW_FORM_ref_sig8
:
7339 case DW_FORM_string
:
7340 read_direct_string (abfd
, info_ptr
, &bytes_read
);
7341 info_ptr
+= bytes_read
;
7343 case DW_FORM_sec_offset
:
7345 case DW_FORM_GNU_strp_alt
:
7346 info_ptr
+= cu
->header
.offset_size
;
7348 case DW_FORM_exprloc
:
7350 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7351 info_ptr
+= bytes_read
;
7353 case DW_FORM_block1
:
7354 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
7356 case DW_FORM_block2
:
7357 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
7359 case DW_FORM_block4
:
7360 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
7364 case DW_FORM_ref_udata
:
7365 case DW_FORM_GNU_addr_index
:
7366 case DW_FORM_GNU_str_index
:
7367 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
7369 case DW_FORM_indirect
:
7370 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7371 info_ptr
+= bytes_read
;
7372 /* We need to continue parsing from here, so just go back to
7374 goto skip_attribute
;
7377 error (_("Dwarf Error: Cannot handle %s "
7378 "in DWARF reader [in module %s]"),
7379 dwarf_form_name (form
),
7380 bfd_get_filename (abfd
));
7384 if (abbrev
->has_children
)
7385 return skip_children (reader
, info_ptr
);
7390 /* Locate ORIG_PDI's sibling.
7391 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
7393 static const gdb_byte
*
7394 locate_pdi_sibling (const struct die_reader_specs
*reader
,
7395 struct partial_die_info
*orig_pdi
,
7396 const gdb_byte
*info_ptr
)
7398 /* Do we know the sibling already? */
7400 if (orig_pdi
->sibling
)
7401 return orig_pdi
->sibling
;
7403 /* Are there any children to deal with? */
7405 if (!orig_pdi
->has_children
)
7408 /* Skip the children the long way. */
7410 return skip_children (reader
, info_ptr
);
7413 /* Expand this partial symbol table into a full symbol table. SELF is
7417 dwarf2_read_symtab (struct partial_symtab
*self
,
7418 struct objfile
*objfile
)
7422 warning (_("bug: psymtab for %s is already read in."),
7429 printf_filtered (_("Reading in symbols for %s..."),
7431 gdb_flush (gdb_stdout
);
7434 /* Restore our global data. */
7436 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
7437 dwarf2_objfile_data_key
);
7439 /* If this psymtab is constructed from a debug-only objfile, the
7440 has_section_at_zero flag will not necessarily be correct. We
7441 can get the correct value for this flag by looking at the data
7442 associated with the (presumably stripped) associated objfile. */
7443 if (objfile
->separate_debug_objfile_backlink
)
7445 struct dwarf2_per_objfile
*dpo_backlink
7446 = ((struct dwarf2_per_objfile
*)
7447 objfile_data (objfile
->separate_debug_objfile_backlink
,
7448 dwarf2_objfile_data_key
));
7450 dwarf2_per_objfile
->has_section_at_zero
7451 = dpo_backlink
->has_section_at_zero
;
7454 dwarf2_per_objfile
->reading_partial_symbols
= 0;
7456 psymtab_to_symtab_1 (self
);
7458 /* Finish up the debug error message. */
7460 printf_filtered (_("done.\n"));
7463 process_cu_includes ();
7466 /* Reading in full CUs. */
7468 /* Add PER_CU to the queue. */
7471 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
7472 enum language pretend_language
)
7474 struct dwarf2_queue_item
*item
;
7477 item
= XNEW (struct dwarf2_queue_item
);
7478 item
->per_cu
= per_cu
;
7479 item
->pretend_language
= pretend_language
;
7482 if (dwarf2_queue
== NULL
)
7483 dwarf2_queue
= item
;
7485 dwarf2_queue_tail
->next
= item
;
7487 dwarf2_queue_tail
= item
;
7490 /* If PER_CU is not yet queued, add it to the queue.
7491 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
7493 The result is non-zero if PER_CU was queued, otherwise the result is zero
7494 meaning either PER_CU is already queued or it is already loaded.
7496 N.B. There is an invariant here that if a CU is queued then it is loaded.
7497 The caller is required to load PER_CU if we return non-zero. */
7500 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
7501 struct dwarf2_per_cu_data
*per_cu
,
7502 enum language pretend_language
)
7504 /* We may arrive here during partial symbol reading, if we need full
7505 DIEs to process an unusual case (e.g. template arguments). Do
7506 not queue PER_CU, just tell our caller to load its DIEs. */
7507 if (dwarf2_per_objfile
->reading_partial_symbols
)
7509 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
7514 /* Mark the dependence relation so that we don't flush PER_CU
7516 if (dependent_cu
!= NULL
)
7517 dwarf2_add_dependence (dependent_cu
, per_cu
);
7519 /* If it's already on the queue, we have nothing to do. */
7523 /* If the compilation unit is already loaded, just mark it as
7525 if (per_cu
->cu
!= NULL
)
7527 per_cu
->cu
->last_used
= 0;
7531 /* Add it to the queue. */
7532 queue_comp_unit (per_cu
, pretend_language
);
7537 /* Process the queue. */
7540 process_queue (void)
7542 struct dwarf2_queue_item
*item
, *next_item
;
7544 if (dwarf_read_debug
)
7546 fprintf_unfiltered (gdb_stdlog
,
7547 "Expanding one or more symtabs of objfile %s ...\n",
7548 objfile_name (dwarf2_per_objfile
->objfile
));
7551 /* The queue starts out with one item, but following a DIE reference
7552 may load a new CU, adding it to the end of the queue. */
7553 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
7555 if ((dwarf2_per_objfile
->using_index
7556 ? !item
->per_cu
->v
.quick
->compunit_symtab
7557 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
7558 /* Skip dummy CUs. */
7559 && item
->per_cu
->cu
!= NULL
)
7561 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
7562 unsigned int debug_print_threshold
;
7565 if (per_cu
->is_debug_types
)
7567 struct signatured_type
*sig_type
=
7568 (struct signatured_type
*) per_cu
;
7570 sprintf (buf
, "TU %s at offset 0x%x",
7571 hex_string (sig_type
->signature
),
7572 per_cu
->offset
.sect_off
);
7573 /* There can be 100s of TUs.
7574 Only print them in verbose mode. */
7575 debug_print_threshold
= 2;
7579 sprintf (buf
, "CU at offset 0x%x", per_cu
->offset
.sect_off
);
7580 debug_print_threshold
= 1;
7583 if (dwarf_read_debug
>= debug_print_threshold
)
7584 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
7586 if (per_cu
->is_debug_types
)
7587 process_full_type_unit (per_cu
, item
->pretend_language
);
7589 process_full_comp_unit (per_cu
, item
->pretend_language
);
7591 if (dwarf_read_debug
>= debug_print_threshold
)
7592 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
7595 item
->per_cu
->queued
= 0;
7596 next_item
= item
->next
;
7600 dwarf2_queue_tail
= NULL
;
7602 if (dwarf_read_debug
)
7604 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
7605 objfile_name (dwarf2_per_objfile
->objfile
));
7609 /* Free all allocated queue entries. This function only releases anything if
7610 an error was thrown; if the queue was processed then it would have been
7611 freed as we went along. */
7614 dwarf2_release_queue (void *dummy
)
7616 struct dwarf2_queue_item
*item
, *last
;
7618 item
= dwarf2_queue
;
7621 /* Anything still marked queued is likely to be in an
7622 inconsistent state, so discard it. */
7623 if (item
->per_cu
->queued
)
7625 if (item
->per_cu
->cu
!= NULL
)
7626 free_one_cached_comp_unit (item
->per_cu
);
7627 item
->per_cu
->queued
= 0;
7635 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
7638 /* Read in full symbols for PST, and anything it depends on. */
7641 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
7643 struct dwarf2_per_cu_data
*per_cu
;
7649 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
7650 if (!pst
->dependencies
[i
]->readin
7651 && pst
->dependencies
[i
]->user
== NULL
)
7653 /* Inform about additional files that need to be read in. */
7656 /* FIXME: i18n: Need to make this a single string. */
7657 fputs_filtered (" ", gdb_stdout
);
7659 fputs_filtered ("and ", gdb_stdout
);
7661 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
7662 wrap_here (""); /* Flush output. */
7663 gdb_flush (gdb_stdout
);
7665 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
7668 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
7672 /* It's an include file, no symbols to read for it.
7673 Everything is in the parent symtab. */
7678 dw2_do_instantiate_symtab (per_cu
);
7681 /* Trivial hash function for die_info: the hash value of a DIE
7682 is its offset in .debug_info for this objfile. */
7685 die_hash (const void *item
)
7687 const struct die_info
*die
= (const struct die_info
*) item
;
7689 return die
->offset
.sect_off
;
7692 /* Trivial comparison function for die_info structures: two DIEs
7693 are equal if they have the same offset. */
7696 die_eq (const void *item_lhs
, const void *item_rhs
)
7698 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
7699 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
7701 return die_lhs
->offset
.sect_off
== die_rhs
->offset
.sect_off
;
7704 /* die_reader_func for load_full_comp_unit.
7705 This is identical to read_signatured_type_reader,
7706 but is kept separate for now. */
7709 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
7710 const gdb_byte
*info_ptr
,
7711 struct die_info
*comp_unit_die
,
7715 struct dwarf2_cu
*cu
= reader
->cu
;
7716 enum language
*language_ptr
= (enum language
*) data
;
7718 gdb_assert (cu
->die_hash
== NULL
);
7720 htab_create_alloc_ex (cu
->header
.length
/ 12,
7724 &cu
->comp_unit_obstack
,
7725 hashtab_obstack_allocate
,
7726 dummy_obstack_deallocate
);
7729 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
7730 &info_ptr
, comp_unit_die
);
7731 cu
->dies
= comp_unit_die
;
7732 /* comp_unit_die is not stored in die_hash, no need. */
7734 /* We try not to read any attributes in this function, because not
7735 all CUs needed for references have been loaded yet, and symbol
7736 table processing isn't initialized. But we have to set the CU language,
7737 or we won't be able to build types correctly.
7738 Similarly, if we do not read the producer, we can not apply
7739 producer-specific interpretation. */
7740 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
7743 /* Load the DIEs associated with PER_CU into memory. */
7746 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
7747 enum language pretend_language
)
7749 gdb_assert (! this_cu
->is_debug_types
);
7751 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
7752 load_full_comp_unit_reader
, &pretend_language
);
7755 /* Add a DIE to the delayed physname list. */
7758 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
7759 const char *name
, struct die_info
*die
,
7760 struct dwarf2_cu
*cu
)
7762 struct delayed_method_info mi
;
7764 mi
.fnfield_index
= fnfield_index
;
7768 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
7771 /* A cleanup for freeing the delayed method list. */
7774 free_delayed_list (void *ptr
)
7776 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
7777 if (cu
->method_list
!= NULL
)
7779 VEC_free (delayed_method_info
, cu
->method_list
);
7780 cu
->method_list
= NULL
;
7784 /* Compute the physnames of any methods on the CU's method list.
7786 The computation of method physnames is delayed in order to avoid the
7787 (bad) condition that one of the method's formal parameters is of an as yet
7791 compute_delayed_physnames (struct dwarf2_cu
*cu
)
7794 struct delayed_method_info
*mi
;
7795 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
7797 const char *physname
;
7798 struct fn_fieldlist
*fn_flp
7799 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
7800 physname
= dwarf2_physname (mi
->name
, mi
->die
, cu
);
7801 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
->index
)
7802 = physname
? physname
: "";
7806 /* Go objects should be embedded in a DW_TAG_module DIE,
7807 and it's not clear if/how imported objects will appear.
7808 To keep Go support simple until that's worked out,
7809 go back through what we've read and create something usable.
7810 We could do this while processing each DIE, and feels kinda cleaner,
7811 but that way is more invasive.
7812 This is to, for example, allow the user to type "p var" or "b main"
7813 without having to specify the package name, and allow lookups
7814 of module.object to work in contexts that use the expression
7818 fixup_go_packaging (struct dwarf2_cu
*cu
)
7820 char *package_name
= NULL
;
7821 struct pending
*list
;
7824 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
7826 for (i
= 0; i
< list
->nsyms
; ++i
)
7828 struct symbol
*sym
= list
->symbol
[i
];
7830 if (SYMBOL_LANGUAGE (sym
) == language_go
7831 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
7833 char *this_package_name
= go_symbol_package_name (sym
);
7835 if (this_package_name
== NULL
)
7837 if (package_name
== NULL
)
7838 package_name
= this_package_name
;
7841 if (strcmp (package_name
, this_package_name
) != 0)
7842 complaint (&symfile_complaints
,
7843 _("Symtab %s has objects from two different Go packages: %s and %s"),
7844 (symbol_symtab (sym
) != NULL
7845 ? symtab_to_filename_for_display
7846 (symbol_symtab (sym
))
7847 : objfile_name (cu
->objfile
)),
7848 this_package_name
, package_name
);
7849 xfree (this_package_name
);
7855 if (package_name
!= NULL
)
7857 struct objfile
*objfile
= cu
->objfile
;
7858 const char *saved_package_name
7859 = (const char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
7861 strlen (package_name
));
7862 struct type
*type
= init_type (TYPE_CODE_MODULE
, 0, 0,
7863 saved_package_name
, objfile
);
7866 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
7868 sym
= allocate_symbol (objfile
);
7869 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
7870 SYMBOL_SET_NAMES (sym
, saved_package_name
,
7871 strlen (saved_package_name
), 0, objfile
);
7872 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
7873 e.g., "main" finds the "main" module and not C's main(). */
7874 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
7875 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
7876 SYMBOL_TYPE (sym
) = type
;
7878 add_symbol_to_list (sym
, &global_symbols
);
7880 xfree (package_name
);
7884 /* Return the symtab for PER_CU. This works properly regardless of
7885 whether we're using the index or psymtabs. */
7887 static struct compunit_symtab
*
7888 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
7890 return (dwarf2_per_objfile
->using_index
7891 ? per_cu
->v
.quick
->compunit_symtab
7892 : per_cu
->v
.psymtab
->compunit_symtab
);
7895 /* A helper function for computing the list of all symbol tables
7896 included by PER_CU. */
7899 recursively_compute_inclusions (VEC (compunit_symtab_ptr
) **result
,
7900 htab_t all_children
, htab_t all_type_symtabs
,
7901 struct dwarf2_per_cu_data
*per_cu
,
7902 struct compunit_symtab
*immediate_parent
)
7906 struct compunit_symtab
*cust
;
7907 struct dwarf2_per_cu_data
*iter
;
7909 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
7912 /* This inclusion and its children have been processed. */
7917 /* Only add a CU if it has a symbol table. */
7918 cust
= get_compunit_symtab (per_cu
);
7921 /* If this is a type unit only add its symbol table if we haven't
7922 seen it yet (type unit per_cu's can share symtabs). */
7923 if (per_cu
->is_debug_types
)
7925 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
7929 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
7930 if (cust
->user
== NULL
)
7931 cust
->user
= immediate_parent
;
7936 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
7937 if (cust
->user
== NULL
)
7938 cust
->user
= immediate_parent
;
7943 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
7946 recursively_compute_inclusions (result
, all_children
,
7947 all_type_symtabs
, iter
, cust
);
7951 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
7955 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
7957 gdb_assert (! per_cu
->is_debug_types
);
7959 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
7962 struct dwarf2_per_cu_data
*per_cu_iter
;
7963 struct compunit_symtab
*compunit_symtab_iter
;
7964 VEC (compunit_symtab_ptr
) *result_symtabs
= NULL
;
7965 htab_t all_children
, all_type_symtabs
;
7966 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
7968 /* If we don't have a symtab, we can just skip this case. */
7972 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
7973 NULL
, xcalloc
, xfree
);
7974 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
7975 NULL
, xcalloc
, xfree
);
7978 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
7982 recursively_compute_inclusions (&result_symtabs
, all_children
,
7983 all_type_symtabs
, per_cu_iter
,
7987 /* Now we have a transitive closure of all the included symtabs. */
7988 len
= VEC_length (compunit_symtab_ptr
, result_symtabs
);
7990 = XOBNEWVEC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
7991 struct compunit_symtab
*, len
+ 1);
7993 VEC_iterate (compunit_symtab_ptr
, result_symtabs
, ix
,
7994 compunit_symtab_iter
);
7996 cust
->includes
[ix
] = compunit_symtab_iter
;
7997 cust
->includes
[len
] = NULL
;
7999 VEC_free (compunit_symtab_ptr
, result_symtabs
);
8000 htab_delete (all_children
);
8001 htab_delete (all_type_symtabs
);
8005 /* Compute the 'includes' field for the symtabs of all the CUs we just
8009 process_cu_includes (void)
8012 struct dwarf2_per_cu_data
*iter
;
8015 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
8019 if (! iter
->is_debug_types
)
8020 compute_compunit_symtab_includes (iter
);
8023 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
8026 /* Generate full symbol information for PER_CU, whose DIEs have
8027 already been loaded into memory. */
8030 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
8031 enum language pretend_language
)
8033 struct dwarf2_cu
*cu
= per_cu
->cu
;
8034 struct objfile
*objfile
= per_cu
->objfile
;
8035 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8036 CORE_ADDR lowpc
, highpc
;
8037 struct compunit_symtab
*cust
;
8038 struct cleanup
*back_to
, *delayed_list_cleanup
;
8040 struct block
*static_block
;
8043 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8046 back_to
= make_cleanup (really_free_pendings
, NULL
);
8047 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
8049 cu
->list_in_scope
= &file_symbols
;
8051 cu
->language
= pretend_language
;
8052 cu
->language_defn
= language_def (cu
->language
);
8054 /* Do line number decoding in read_file_scope () */
8055 process_die (cu
->dies
, cu
);
8057 /* For now fudge the Go package. */
8058 if (cu
->language
== language_go
)
8059 fixup_go_packaging (cu
);
8061 /* Now that we have processed all the DIEs in the CU, all the types
8062 should be complete, and it should now be safe to compute all of the
8064 compute_delayed_physnames (cu
);
8065 do_cleanups (delayed_list_cleanup
);
8067 /* Some compilers don't define a DW_AT_high_pc attribute for the
8068 compilation unit. If the DW_AT_high_pc is missing, synthesize
8069 it, by scanning the DIE's below the compilation unit. */
8070 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
8072 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
8073 static_block
= end_symtab_get_static_block (addr
, 0, 1);
8075 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
8076 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
8077 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
8078 addrmap to help ensure it has an accurate map of pc values belonging to
8080 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
8082 cust
= end_symtab_from_static_block (static_block
,
8083 SECT_OFF_TEXT (objfile
), 0);
8087 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
8089 /* Set symtab language to language from DW_AT_language. If the
8090 compilation is from a C file generated by language preprocessors, do
8091 not set the language if it was already deduced by start_subfile. */
8092 if (!(cu
->language
== language_c
8093 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
8094 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8096 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
8097 produce DW_AT_location with location lists but it can be possibly
8098 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
8099 there were bugs in prologue debug info, fixed later in GCC-4.5
8100 by "unwind info for epilogues" patch (which is not directly related).
8102 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
8103 needed, it would be wrong due to missing DW_AT_producer there.
8105 Still one can confuse GDB by using non-standard GCC compilation
8106 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
8108 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
8109 cust
->locations_valid
= 1;
8111 if (gcc_4_minor
>= 5)
8112 cust
->epilogue_unwind_valid
= 1;
8114 cust
->call_site_htab
= cu
->call_site_htab
;
8117 if (dwarf2_per_objfile
->using_index
)
8118 per_cu
->v
.quick
->compunit_symtab
= cust
;
8121 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8122 pst
->compunit_symtab
= cust
;
8126 /* Push it for inclusion processing later. */
8127 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
8129 do_cleanups (back_to
);
8132 /* Generate full symbol information for type unit PER_CU, whose DIEs have
8133 already been loaded into memory. */
8136 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
8137 enum language pretend_language
)
8139 struct dwarf2_cu
*cu
= per_cu
->cu
;
8140 struct objfile
*objfile
= per_cu
->objfile
;
8141 struct compunit_symtab
*cust
;
8142 struct cleanup
*back_to
, *delayed_list_cleanup
;
8143 struct signatured_type
*sig_type
;
8145 gdb_assert (per_cu
->is_debug_types
);
8146 sig_type
= (struct signatured_type
*) per_cu
;
8149 back_to
= make_cleanup (really_free_pendings
, NULL
);
8150 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
8152 cu
->list_in_scope
= &file_symbols
;
8154 cu
->language
= pretend_language
;
8155 cu
->language_defn
= language_def (cu
->language
);
8157 /* The symbol tables are set up in read_type_unit_scope. */
8158 process_die (cu
->dies
, cu
);
8160 /* For now fudge the Go package. */
8161 if (cu
->language
== language_go
)
8162 fixup_go_packaging (cu
);
8164 /* Now that we have processed all the DIEs in the CU, all the types
8165 should be complete, and it should now be safe to compute all of the
8167 compute_delayed_physnames (cu
);
8168 do_cleanups (delayed_list_cleanup
);
8170 /* TUs share symbol tables.
8171 If this is the first TU to use this symtab, complete the construction
8172 of it with end_expandable_symtab. Otherwise, complete the addition of
8173 this TU's symbols to the existing symtab. */
8174 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
8176 cust
= end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
8177 sig_type
->type_unit_group
->compunit_symtab
= cust
;
8181 /* Set symtab language to language from DW_AT_language. If the
8182 compilation is from a C file generated by language preprocessors,
8183 do not set the language if it was already deduced by
8185 if (!(cu
->language
== language_c
8186 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
8187 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8192 augment_type_symtab ();
8193 cust
= sig_type
->type_unit_group
->compunit_symtab
;
8196 if (dwarf2_per_objfile
->using_index
)
8197 per_cu
->v
.quick
->compunit_symtab
= cust
;
8200 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8201 pst
->compunit_symtab
= cust
;
8205 do_cleanups (back_to
);
8208 /* Process an imported unit DIE. */
8211 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8213 struct attribute
*attr
;
8215 /* For now we don't handle imported units in type units. */
8216 if (cu
->per_cu
->is_debug_types
)
8218 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8219 " supported in type units [in module %s]"),
8220 objfile_name (cu
->objfile
));
8223 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8226 struct dwarf2_per_cu_data
*per_cu
;
8230 offset
= dwarf2_get_ref_die_offset (attr
);
8231 is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
8232 per_cu
= dwarf2_find_containing_comp_unit (offset
, is_dwz
, cu
->objfile
);
8234 /* If necessary, add it to the queue and load its DIEs. */
8235 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
8236 load_full_comp_unit (per_cu
, cu
->language
);
8238 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
8243 /* Reset the in_process bit of a die. */
8246 reset_die_in_process (void *arg
)
8248 struct die_info
*die
= (struct die_info
*) arg
;
8250 die
->in_process
= 0;
8253 /* Process a die and its children. */
8256 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8258 struct cleanup
*in_process
;
8260 /* We should only be processing those not already in process. */
8261 gdb_assert (!die
->in_process
);
8263 die
->in_process
= 1;
8264 in_process
= make_cleanup (reset_die_in_process
,die
);
8268 case DW_TAG_padding
:
8270 case DW_TAG_compile_unit
:
8271 case DW_TAG_partial_unit
:
8272 read_file_scope (die
, cu
);
8274 case DW_TAG_type_unit
:
8275 read_type_unit_scope (die
, cu
);
8277 case DW_TAG_subprogram
:
8278 case DW_TAG_inlined_subroutine
:
8279 read_func_scope (die
, cu
);
8281 case DW_TAG_lexical_block
:
8282 case DW_TAG_try_block
:
8283 case DW_TAG_catch_block
:
8284 read_lexical_block_scope (die
, cu
);
8286 case DW_TAG_GNU_call_site
:
8287 read_call_site_scope (die
, cu
);
8289 case DW_TAG_class_type
:
8290 case DW_TAG_interface_type
:
8291 case DW_TAG_structure_type
:
8292 case DW_TAG_union_type
:
8293 process_structure_scope (die
, cu
);
8295 case DW_TAG_enumeration_type
:
8296 process_enumeration_scope (die
, cu
);
8299 /* These dies have a type, but processing them does not create
8300 a symbol or recurse to process the children. Therefore we can
8301 read them on-demand through read_type_die. */
8302 case DW_TAG_subroutine_type
:
8303 case DW_TAG_set_type
:
8304 case DW_TAG_array_type
:
8305 case DW_TAG_pointer_type
:
8306 case DW_TAG_ptr_to_member_type
:
8307 case DW_TAG_reference_type
:
8308 case DW_TAG_string_type
:
8311 case DW_TAG_base_type
:
8312 case DW_TAG_subrange_type
:
8313 case DW_TAG_typedef
:
8314 /* Add a typedef symbol for the type definition, if it has a
8316 new_symbol (die
, read_type_die (die
, cu
), cu
);
8318 case DW_TAG_common_block
:
8319 read_common_block (die
, cu
);
8321 case DW_TAG_common_inclusion
:
8323 case DW_TAG_namespace
:
8324 cu
->processing_has_namespace_info
= 1;
8325 read_namespace (die
, cu
);
8328 cu
->processing_has_namespace_info
= 1;
8329 read_module (die
, cu
);
8331 case DW_TAG_imported_declaration
:
8332 cu
->processing_has_namespace_info
= 1;
8333 if (read_namespace_alias (die
, cu
))
8335 /* The declaration is not a global namespace alias: fall through. */
8336 case DW_TAG_imported_module
:
8337 cu
->processing_has_namespace_info
= 1;
8338 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
8339 || cu
->language
!= language_fortran
))
8340 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
8341 dwarf_tag_name (die
->tag
));
8342 read_import_statement (die
, cu
);
8345 case DW_TAG_imported_unit
:
8346 process_imported_unit_die (die
, cu
);
8350 new_symbol (die
, NULL
, cu
);
8354 do_cleanups (in_process
);
8357 /* DWARF name computation. */
8359 /* A helper function for dwarf2_compute_name which determines whether DIE
8360 needs to have the name of the scope prepended to the name listed in the
8364 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
8366 struct attribute
*attr
;
8370 case DW_TAG_namespace
:
8371 case DW_TAG_typedef
:
8372 case DW_TAG_class_type
:
8373 case DW_TAG_interface_type
:
8374 case DW_TAG_structure_type
:
8375 case DW_TAG_union_type
:
8376 case DW_TAG_enumeration_type
:
8377 case DW_TAG_enumerator
:
8378 case DW_TAG_subprogram
:
8379 case DW_TAG_inlined_subroutine
:
8381 case DW_TAG_imported_declaration
:
8384 case DW_TAG_variable
:
8385 case DW_TAG_constant
:
8386 /* We only need to prefix "globally" visible variables. These include
8387 any variable marked with DW_AT_external or any variable that
8388 lives in a namespace. [Variables in anonymous namespaces
8389 require prefixing, but they are not DW_AT_external.] */
8391 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
8393 struct dwarf2_cu
*spec_cu
= cu
;
8395 return die_needs_namespace (die_specification (die
, &spec_cu
),
8399 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
8400 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
8401 && die
->parent
->tag
!= DW_TAG_module
)
8403 /* A variable in a lexical block of some kind does not need a
8404 namespace, even though in C++ such variables may be external
8405 and have a mangled name. */
8406 if (die
->parent
->tag
== DW_TAG_lexical_block
8407 || die
->parent
->tag
== DW_TAG_try_block
8408 || die
->parent
->tag
== DW_TAG_catch_block
8409 || die
->parent
->tag
== DW_TAG_subprogram
)
8418 /* Retrieve the last character from a mem_file. */
8421 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
8423 char *last_char_p
= (char *) object
;
8426 *last_char_p
= buffer
[length
- 1];
8429 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
8430 compute the physname for the object, which include a method's:
8431 - formal parameters (C++/Java),
8432 - receiver type (Go),
8433 - return type (Java).
8435 The term "physname" is a bit confusing.
8436 For C++, for example, it is the demangled name.
8437 For Go, for example, it's the mangled name.
8439 For Ada, return the DIE's linkage name rather than the fully qualified
8440 name. PHYSNAME is ignored..
8442 The result is allocated on the objfile_obstack and canonicalized. */
8445 dwarf2_compute_name (const char *name
,
8446 struct die_info
*die
, struct dwarf2_cu
*cu
,
8449 struct objfile
*objfile
= cu
->objfile
;
8452 name
= dwarf2_name (die
, cu
);
8454 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
8455 but otherwise compute it by typename_concat inside GDB.
8456 FIXME: Actually this is not really true, or at least not always true.
8457 It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle
8458 Fortran names because there is no mangling standard. So new_symbol_full
8459 will set the demangled name to the result of dwarf2_full_name, and it is
8460 the demangled name that GDB uses if it exists. */
8461 if (cu
->language
== language_ada
8462 || (cu
->language
== language_fortran
&& physname
))
8464 /* For Ada unit, we prefer the linkage name over the name, as
8465 the former contains the exported name, which the user expects
8466 to be able to reference. Ideally, we want the user to be able
8467 to reference this entity using either natural or linkage name,
8468 but we haven't started looking at this enhancement yet. */
8469 const char *linkage_name
;
8471 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
8472 if (linkage_name
== NULL
)
8473 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8474 if (linkage_name
!= NULL
)
8475 return linkage_name
;
8478 /* These are the only languages we know how to qualify names in. */
8480 && (cu
->language
== language_cplus
|| cu
->language
== language_java
8481 || cu
->language
== language_fortran
|| cu
->language
== language_d
8482 || cu
->language
== language_rust
))
8484 if (die_needs_namespace (die
, cu
))
8488 struct ui_file
*buf
;
8489 char *intermediate_name
;
8490 const char *canonical_name
= NULL
;
8492 prefix
= determine_prefix (die
, cu
);
8493 buf
= mem_fileopen ();
8494 if (*prefix
!= '\0')
8496 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
8499 fputs_unfiltered (prefixed_name
, buf
);
8500 xfree (prefixed_name
);
8503 fputs_unfiltered (name
, buf
);
8505 /* Template parameters may be specified in the DIE's DW_AT_name, or
8506 as children with DW_TAG_template_type_param or
8507 DW_TAG_value_type_param. If the latter, add them to the name
8508 here. If the name already has template parameters, then
8509 skip this step; some versions of GCC emit both, and
8510 it is more efficient to use the pre-computed name.
8512 Something to keep in mind about this process: it is very
8513 unlikely, or in some cases downright impossible, to produce
8514 something that will match the mangled name of a function.
8515 If the definition of the function has the same debug info,
8516 we should be able to match up with it anyway. But fallbacks
8517 using the minimal symbol, for instance to find a method
8518 implemented in a stripped copy of libstdc++, will not work.
8519 If we do not have debug info for the definition, we will have to
8520 match them up some other way.
8522 When we do name matching there is a related problem with function
8523 templates; two instantiated function templates are allowed to
8524 differ only by their return types, which we do not add here. */
8526 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
8528 struct attribute
*attr
;
8529 struct die_info
*child
;
8532 die
->building_fullname
= 1;
8534 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
8538 const gdb_byte
*bytes
;
8539 struct dwarf2_locexpr_baton
*baton
;
8542 if (child
->tag
!= DW_TAG_template_type_param
8543 && child
->tag
!= DW_TAG_template_value_param
)
8548 fputs_unfiltered ("<", buf
);
8552 fputs_unfiltered (", ", buf
);
8554 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
8557 complaint (&symfile_complaints
,
8558 _("template parameter missing DW_AT_type"));
8559 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
8562 type
= die_type (child
, cu
);
8564 if (child
->tag
== DW_TAG_template_type_param
)
8566 c_print_type (type
, "", buf
, -1, 0, &type_print_raw_options
);
8570 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
8573 complaint (&symfile_complaints
,
8574 _("template parameter missing "
8575 "DW_AT_const_value"));
8576 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
8580 dwarf2_const_value_attr (attr
, type
, name
,
8581 &cu
->comp_unit_obstack
, cu
,
8582 &value
, &bytes
, &baton
);
8584 if (TYPE_NOSIGN (type
))
8585 /* GDB prints characters as NUMBER 'CHAR'. If that's
8586 changed, this can use value_print instead. */
8587 c_printchar (value
, type
, buf
);
8590 struct value_print_options opts
;
8593 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
8597 else if (bytes
!= NULL
)
8599 v
= allocate_value (type
);
8600 memcpy (value_contents_writeable (v
), bytes
,
8601 TYPE_LENGTH (type
));
8604 v
= value_from_longest (type
, value
);
8606 /* Specify decimal so that we do not depend on
8608 get_formatted_print_options (&opts
, 'd');
8610 value_print (v
, buf
, &opts
);
8616 die
->building_fullname
= 0;
8620 /* Close the argument list, with a space if necessary
8621 (nested templates). */
8622 char last_char
= '\0';
8623 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
8624 if (last_char
== '>')
8625 fputs_unfiltered (" >", buf
);
8627 fputs_unfiltered (">", buf
);
8631 /* For Java and C++ methods, append formal parameter type
8632 information, if PHYSNAME. */
8634 if (physname
&& die
->tag
== DW_TAG_subprogram
8635 && (cu
->language
== language_cplus
8636 || cu
->language
== language_java
))
8638 struct type
*type
= read_type_die (die
, cu
);
8640 c_type_print_args (type
, buf
, 1, cu
->language
,
8641 &type_print_raw_options
);
8643 if (cu
->language
== language_java
)
8645 /* For java, we must append the return type to method
8647 if (die
->tag
== DW_TAG_subprogram
)
8648 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
8649 0, 0, &type_print_raw_options
);
8651 else if (cu
->language
== language_cplus
)
8653 /* Assume that an artificial first parameter is
8654 "this", but do not crash if it is not. RealView
8655 marks unnamed (and thus unused) parameters as
8656 artificial; there is no way to differentiate
8658 if (TYPE_NFIELDS (type
) > 0
8659 && TYPE_FIELD_ARTIFICIAL (type
, 0)
8660 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
8661 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
8663 fputs_unfiltered (" const", buf
);
8667 intermediate_name
= ui_file_xstrdup (buf
, &length
);
8668 ui_file_delete (buf
);
8670 if (cu
->language
== language_cplus
)
8672 = dwarf2_canonicalize_name (intermediate_name
, cu
,
8673 &objfile
->per_bfd
->storage_obstack
);
8675 /* If we only computed INTERMEDIATE_NAME, or if
8676 INTERMEDIATE_NAME is already canonical, then we need to
8677 copy it to the appropriate obstack. */
8678 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
)
8679 name
= ((const char *)
8680 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8682 strlen (intermediate_name
)));
8684 name
= canonical_name
;
8686 xfree (intermediate_name
);
8693 /* Return the fully qualified name of DIE, based on its DW_AT_name.
8694 If scope qualifiers are appropriate they will be added. The result
8695 will be allocated on the storage_obstack, or NULL if the DIE does
8696 not have a name. NAME may either be from a previous call to
8697 dwarf2_name or NULL.
8699 The output string will be canonicalized (if C++/Java). */
8702 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
8704 return dwarf2_compute_name (name
, die
, cu
, 0);
8707 /* Construct a physname for the given DIE in CU. NAME may either be
8708 from a previous call to dwarf2_name or NULL. The result will be
8709 allocated on the objfile_objstack or NULL if the DIE does not have a
8712 The output string will be canonicalized (if C++/Java). */
8715 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
8717 struct objfile
*objfile
= cu
->objfile
;
8718 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
8719 struct cleanup
*back_to
;
8722 /* In this case dwarf2_compute_name is just a shortcut not building anything
8724 if (!die_needs_namespace (die
, cu
))
8725 return dwarf2_compute_name (name
, die
, cu
, 1);
8727 back_to
= make_cleanup (null_cleanup
, NULL
);
8729 mangled
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
8730 if (mangled
== NULL
)
8731 mangled
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8733 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
8735 if (mangled
!= NULL
)
8739 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
8740 type. It is easier for GDB users to search for such functions as
8741 `name(params)' than `long name(params)'. In such case the minimal
8742 symbol names do not match the full symbol names but for template
8743 functions there is never a need to look up their definition from their
8744 declaration so the only disadvantage remains the minimal symbol
8745 variant `long name(params)' does not have the proper inferior type.
8748 if (cu
->language
== language_go
)
8750 /* This is a lie, but we already lie to the caller new_symbol_full.
8751 new_symbol_full assumes we return the mangled name.
8752 This just undoes that lie until things are cleaned up. */
8757 demangled
= gdb_demangle (mangled
,
8758 (DMGL_PARAMS
| DMGL_ANSI
8759 | (cu
->language
== language_java
8760 ? DMGL_JAVA
| DMGL_RET_POSTFIX
8765 make_cleanup (xfree
, demangled
);
8775 if (canon
== NULL
|| check_physname
)
8777 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
8779 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
8781 /* It may not mean a bug in GDB. The compiler could also
8782 compute DW_AT_linkage_name incorrectly. But in such case
8783 GDB would need to be bug-to-bug compatible. */
8785 complaint (&symfile_complaints
,
8786 _("Computed physname <%s> does not match demangled <%s> "
8787 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
8788 physname
, canon
, mangled
, die
->offset
.sect_off
,
8789 objfile_name (objfile
));
8791 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
8792 is available here - over computed PHYSNAME. It is safer
8793 against both buggy GDB and buggy compilers. */
8807 retval
= ((const char *)
8808 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8809 retval
, strlen (retval
)));
8811 do_cleanups (back_to
);
8815 /* Inspect DIE in CU for a namespace alias. If one exists, record
8816 a new symbol for it.
8818 Returns 1 if a namespace alias was recorded, 0 otherwise. */
8821 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
8823 struct attribute
*attr
;
8825 /* If the die does not have a name, this is not a namespace
8827 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
8831 struct die_info
*d
= die
;
8832 struct dwarf2_cu
*imported_cu
= cu
;
8834 /* If the compiler has nested DW_AT_imported_declaration DIEs,
8835 keep inspecting DIEs until we hit the underlying import. */
8836 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
8837 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
8839 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
8843 d
= follow_die_ref (d
, attr
, &imported_cu
);
8844 if (d
->tag
!= DW_TAG_imported_declaration
)
8848 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
8850 complaint (&symfile_complaints
,
8851 _("DIE at 0x%x has too many recursively imported "
8852 "declarations"), d
->offset
.sect_off
);
8859 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
8861 type
= get_die_type_at_offset (offset
, cu
->per_cu
);
8862 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
8864 /* This declaration is a global namespace alias. Add
8865 a symbol for it whose type is the aliased namespace. */
8866 new_symbol (die
, type
, cu
);
8875 /* Return the using directives repository (global or local?) to use in the
8876 current context for LANGUAGE.
8878 For Ada, imported declarations can materialize renamings, which *may* be
8879 global. However it is impossible (for now?) in DWARF to distinguish
8880 "external" imported declarations and "static" ones. As all imported
8881 declarations seem to be static in all other languages, make them all CU-wide
8882 global only in Ada. */
8884 static struct using_direct
**
8885 using_directives (enum language language
)
8887 if (language
== language_ada
&& context_stack_depth
== 0)
8888 return &global_using_directives
;
8890 return &local_using_directives
;
8893 /* Read the import statement specified by the given die and record it. */
8896 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
8898 struct objfile
*objfile
= cu
->objfile
;
8899 struct attribute
*import_attr
;
8900 struct die_info
*imported_die
, *child_die
;
8901 struct dwarf2_cu
*imported_cu
;
8902 const char *imported_name
;
8903 const char *imported_name_prefix
;
8904 const char *canonical_name
;
8905 const char *import_alias
;
8906 const char *imported_declaration
= NULL
;
8907 const char *import_prefix
;
8908 VEC (const_char_ptr
) *excludes
= NULL
;
8909 struct cleanup
*cleanups
;
8911 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8912 if (import_attr
== NULL
)
8914 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
8915 dwarf_tag_name (die
->tag
));
8920 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
8921 imported_name
= dwarf2_name (imported_die
, imported_cu
);
8922 if (imported_name
== NULL
)
8924 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
8926 The import in the following code:
8940 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
8941 <52> DW_AT_decl_file : 1
8942 <53> DW_AT_decl_line : 6
8943 <54> DW_AT_import : <0x75>
8944 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
8946 <5b> DW_AT_decl_file : 1
8947 <5c> DW_AT_decl_line : 2
8948 <5d> DW_AT_type : <0x6e>
8950 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
8951 <76> DW_AT_byte_size : 4
8952 <77> DW_AT_encoding : 5 (signed)
8954 imports the wrong die ( 0x75 instead of 0x58 ).
8955 This case will be ignored until the gcc bug is fixed. */
8959 /* Figure out the local name after import. */
8960 import_alias
= dwarf2_name (die
, cu
);
8962 /* Figure out where the statement is being imported to. */
8963 import_prefix
= determine_prefix (die
, cu
);
8965 /* Figure out what the scope of the imported die is and prepend it
8966 to the name of the imported die. */
8967 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
8969 if (imported_die
->tag
!= DW_TAG_namespace
8970 && imported_die
->tag
!= DW_TAG_module
)
8972 imported_declaration
= imported_name
;
8973 canonical_name
= imported_name_prefix
;
8975 else if (strlen (imported_name_prefix
) > 0)
8976 canonical_name
= obconcat (&objfile
->objfile_obstack
,
8977 imported_name_prefix
,
8978 (cu
->language
== language_d
? "." : "::"),
8979 imported_name
, (char *) NULL
);
8981 canonical_name
= imported_name
;
8983 cleanups
= make_cleanup (VEC_cleanup (const_char_ptr
), &excludes
);
8985 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
8986 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
8987 child_die
= sibling_die (child_die
))
8989 /* DWARF-4: A Fortran use statement with a “rename list” may be
8990 represented by an imported module entry with an import attribute
8991 referring to the module and owned entries corresponding to those
8992 entities that are renamed as part of being imported. */
8994 if (child_die
->tag
!= DW_TAG_imported_declaration
)
8996 complaint (&symfile_complaints
,
8997 _("child DW_TAG_imported_declaration expected "
8998 "- DIE at 0x%x [in module %s]"),
8999 child_die
->offset
.sect_off
, objfile_name (objfile
));
9003 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
9004 if (import_attr
== NULL
)
9006 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
9007 dwarf_tag_name (child_die
->tag
));
9012 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
9014 imported_name
= dwarf2_name (imported_die
, imported_cu
);
9015 if (imported_name
== NULL
)
9017 complaint (&symfile_complaints
,
9018 _("child DW_TAG_imported_declaration has unknown "
9019 "imported name - DIE at 0x%x [in module %s]"),
9020 child_die
->offset
.sect_off
, objfile_name (objfile
));
9024 VEC_safe_push (const_char_ptr
, excludes
, imported_name
);
9026 process_die (child_die
, cu
);
9029 add_using_directive (using_directives (cu
->language
),
9033 imported_declaration
,
9036 &objfile
->objfile_obstack
);
9038 do_cleanups (cleanups
);
9041 /* Cleanup function for handle_DW_AT_stmt_list. */
9044 free_cu_line_header (void *arg
)
9046 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) arg
;
9048 free_line_header (cu
->line_header
);
9049 cu
->line_header
= NULL
;
9052 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
9053 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
9054 this, it was first present in GCC release 4.3.0. */
9057 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
9059 if (!cu
->checked_producer
)
9060 check_producer (cu
);
9062 return cu
->producer_is_gcc_lt_4_3
;
9066 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
9067 const char **name
, const char **comp_dir
)
9069 /* Find the filename. Do not use dwarf2_name here, since the filename
9070 is not a source language identifier. */
9071 *name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
9072 *comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
9074 if (*comp_dir
== NULL
9075 && producer_is_gcc_lt_4_3 (cu
) && *name
!= NULL
9076 && IS_ABSOLUTE_PATH (*name
))
9078 char *d
= ldirname (*name
);
9082 make_cleanup (xfree
, d
);
9084 if (*comp_dir
!= NULL
)
9086 /* Irix 6.2 native cc prepends <machine>.: to the compilation
9087 directory, get rid of it. */
9088 const char *cp
= strchr (*comp_dir
, ':');
9090 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
9095 *name
= "<unknown>";
9098 /* Handle DW_AT_stmt_list for a compilation unit.
9099 DIE is the DW_TAG_compile_unit die for CU.
9100 COMP_DIR is the compilation directory. LOWPC is passed to
9101 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
9104 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
9105 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
9107 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9108 struct attribute
*attr
;
9109 unsigned int line_offset
;
9110 struct line_header line_header_local
;
9111 hashval_t line_header_local_hash
;
9116 gdb_assert (! cu
->per_cu
->is_debug_types
);
9118 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9122 line_offset
= DW_UNSND (attr
);
9124 /* The line header hash table is only created if needed (it exists to
9125 prevent redundant reading of the line table for partial_units).
9126 If we're given a partial_unit, we'll need it. If we're given a
9127 compile_unit, then use the line header hash table if it's already
9128 created, but don't create one just yet. */
9130 if (dwarf2_per_objfile
->line_header_hash
== NULL
9131 && die
->tag
== DW_TAG_partial_unit
)
9133 dwarf2_per_objfile
->line_header_hash
9134 = htab_create_alloc_ex (127, line_header_hash_voidp
,
9135 line_header_eq_voidp
,
9136 free_line_header_voidp
,
9137 &objfile
->objfile_obstack
,
9138 hashtab_obstack_allocate
,
9139 dummy_obstack_deallocate
);
9142 line_header_local
.offset
.sect_off
= line_offset
;
9143 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
9144 line_header_local_hash
= line_header_hash (&line_header_local
);
9145 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
9147 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
9149 line_header_local_hash
, NO_INSERT
);
9151 /* For DW_TAG_compile_unit we need info like symtab::linetable which
9152 is not present in *SLOT (since if there is something in *SLOT then
9153 it will be for a partial_unit). */
9154 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
9156 gdb_assert (*slot
!= NULL
);
9157 cu
->line_header
= (struct line_header
*) *slot
;
9162 /* dwarf_decode_line_header does not yet provide sufficient information.
9163 We always have to call also dwarf_decode_lines for it. */
9164 cu
->line_header
= dwarf_decode_line_header (line_offset
, cu
);
9165 if (cu
->line_header
== NULL
)
9168 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
9172 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
9174 line_header_local_hash
, INSERT
);
9175 gdb_assert (slot
!= NULL
);
9177 if (slot
!= NULL
&& *slot
== NULL
)
9179 /* This newly decoded line number information unit will be owned
9180 by line_header_hash hash table. */
9181 *slot
= cu
->line_header
;
9185 /* We cannot free any current entry in (*slot) as that struct line_header
9186 may be already used by multiple CUs. Create only temporary decoded
9187 line_header for this CU - it may happen at most once for each line
9188 number information unit. And if we're not using line_header_hash
9189 then this is what we want as well. */
9190 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
9191 make_cleanup (free_cu_line_header
, cu
);
9193 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
9194 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
9198 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
9201 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9203 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9204 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9205 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
9206 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
9207 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
9208 struct attribute
*attr
;
9209 const char *name
= NULL
;
9210 const char *comp_dir
= NULL
;
9211 struct die_info
*child_die
;
9214 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9216 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
9218 /* If we didn't find a lowpc, set it to highpc to avoid complaints
9219 from finish_block. */
9220 if (lowpc
== ((CORE_ADDR
) -1))
9222 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
9224 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
9226 prepare_one_comp_unit (cu
, die
, cu
->language
);
9228 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
9229 standardised yet. As a workaround for the language detection we fall
9230 back to the DW_AT_producer string. */
9231 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
9232 cu
->language
= language_opencl
;
9234 /* Similar hack for Go. */
9235 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
9236 set_cu_language (DW_LANG_Go
, cu
);
9238 dwarf2_start_symtab (cu
, name
, comp_dir
, lowpc
);
9240 /* Decode line number information if present. We do this before
9241 processing child DIEs, so that the line header table is available
9242 for DW_AT_decl_file. */
9243 handle_DW_AT_stmt_list (die
, cu
, comp_dir
, lowpc
);
9245 /* Process all dies in compilation unit. */
9246 if (die
->child
!= NULL
)
9248 child_die
= die
->child
;
9249 while (child_die
&& child_die
->tag
)
9251 process_die (child_die
, cu
);
9252 child_die
= sibling_die (child_die
);
9256 /* Decode macro information, if present. Dwarf 2 macro information
9257 refers to information in the line number info statement program
9258 header, so we can only read it if we've read the header
9260 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
9261 if (attr
&& cu
->line_header
)
9263 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
9264 complaint (&symfile_complaints
,
9265 _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
9267 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
9271 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
9272 if (attr
&& cu
->line_header
)
9274 unsigned int macro_offset
= DW_UNSND (attr
);
9276 dwarf_decode_macros (cu
, macro_offset
, 0);
9280 do_cleanups (back_to
);
9283 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
9284 Create the set of symtabs used by this TU, or if this TU is sharing
9285 symtabs with another TU and the symtabs have already been created
9286 then restore those symtabs in the line header.
9287 We don't need the pc/line-number mapping for type units. */
9290 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
9292 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
9293 struct type_unit_group
*tu_group
;
9295 struct line_header
*lh
;
9296 struct attribute
*attr
;
9297 unsigned int i
, line_offset
;
9298 struct signatured_type
*sig_type
;
9300 gdb_assert (per_cu
->is_debug_types
);
9301 sig_type
= (struct signatured_type
*) per_cu
;
9303 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9305 /* If we're using .gdb_index (includes -readnow) then
9306 per_cu->type_unit_group may not have been set up yet. */
9307 if (sig_type
->type_unit_group
== NULL
)
9308 sig_type
->type_unit_group
= get_type_unit_group (cu
, attr
);
9309 tu_group
= sig_type
->type_unit_group
;
9311 /* If we've already processed this stmt_list there's no real need to
9312 do it again, we could fake it and just recreate the part we need
9313 (file name,index -> symtab mapping). If data shows this optimization
9314 is useful we can do it then. */
9315 first_time
= tu_group
->compunit_symtab
== NULL
;
9317 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
9322 line_offset
= DW_UNSND (attr
);
9323 lh
= dwarf_decode_line_header (line_offset
, cu
);
9328 dwarf2_start_symtab (cu
, "", NULL
, 0);
9331 gdb_assert (tu_group
->symtabs
== NULL
);
9332 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9337 cu
->line_header
= lh
;
9338 make_cleanup (free_cu_line_header
, cu
);
9342 struct compunit_symtab
*cust
= dwarf2_start_symtab (cu
, "", NULL
, 0);
9344 /* Note: We don't assign tu_group->compunit_symtab yet because we're
9345 still initializing it, and our caller (a few levels up)
9346 process_full_type_unit still needs to know if this is the first
9349 tu_group
->num_symtabs
= lh
->num_file_names
;
9350 tu_group
->symtabs
= XNEWVEC (struct symtab
*, lh
->num_file_names
);
9352 for (i
= 0; i
< lh
->num_file_names
; ++i
)
9354 const char *dir
= NULL
;
9355 struct file_entry
*fe
= &lh
->file_names
[i
];
9357 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
9358 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
9359 dwarf2_start_subfile (fe
->name
, dir
);
9361 if (current_subfile
->symtab
== NULL
)
9363 /* NOTE: start_subfile will recognize when it's been passed
9364 a file it has already seen. So we can't assume there's a
9365 simple mapping from lh->file_names to subfiles, plus
9366 lh->file_names may contain dups. */
9367 current_subfile
->symtab
9368 = allocate_symtab (cust
, current_subfile
->name
);
9371 fe
->symtab
= current_subfile
->symtab
;
9372 tu_group
->symtabs
[i
] = fe
->symtab
;
9377 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9379 for (i
= 0; i
< lh
->num_file_names
; ++i
)
9381 struct file_entry
*fe
= &lh
->file_names
[i
];
9383 fe
->symtab
= tu_group
->symtabs
[i
];
9387 /* The main symtab is allocated last. Type units don't have DW_AT_name
9388 so they don't have a "real" (so to speak) symtab anyway.
9389 There is later code that will assign the main symtab to all symbols
9390 that don't have one. We need to handle the case of a symbol with a
9391 missing symtab (DW_AT_decl_file) anyway. */
9394 /* Process DW_TAG_type_unit.
9395 For TUs we want to skip the first top level sibling if it's not the
9396 actual type being defined by this TU. In this case the first top
9397 level sibling is there to provide context only. */
9400 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9402 struct die_info
*child_die
;
9404 prepare_one_comp_unit (cu
, die
, language_minimal
);
9406 /* Initialize (or reinitialize) the machinery for building symtabs.
9407 We do this before processing child DIEs, so that the line header table
9408 is available for DW_AT_decl_file. */
9409 setup_type_unit_groups (die
, cu
);
9411 if (die
->child
!= NULL
)
9413 child_die
= die
->child
;
9414 while (child_die
&& child_die
->tag
)
9416 process_die (child_die
, cu
);
9417 child_die
= sibling_die (child_die
);
9424 http://gcc.gnu.org/wiki/DebugFission
9425 http://gcc.gnu.org/wiki/DebugFissionDWP
9427 To simplify handling of both DWO files ("object" files with the DWARF info)
9428 and DWP files (a file with the DWOs packaged up into one file), we treat
9429 DWP files as having a collection of virtual DWO files. */
9432 hash_dwo_file (const void *item
)
9434 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
9437 hash
= htab_hash_string (dwo_file
->dwo_name
);
9438 if (dwo_file
->comp_dir
!= NULL
)
9439 hash
+= htab_hash_string (dwo_file
->comp_dir
);
9444 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
9446 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
9447 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
9449 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
9451 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
9452 return lhs
->comp_dir
== rhs
->comp_dir
;
9453 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
9456 /* Allocate a hash table for DWO files. */
9459 allocate_dwo_file_hash_table (void)
9461 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9463 return htab_create_alloc_ex (41,
9467 &objfile
->objfile_obstack
,
9468 hashtab_obstack_allocate
,
9469 dummy_obstack_deallocate
);
9472 /* Lookup DWO file DWO_NAME. */
9475 lookup_dwo_file_slot (const char *dwo_name
, const char *comp_dir
)
9477 struct dwo_file find_entry
;
9480 if (dwarf2_per_objfile
->dwo_files
== NULL
)
9481 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
9483 memset (&find_entry
, 0, sizeof (find_entry
));
9484 find_entry
.dwo_name
= dwo_name
;
9485 find_entry
.comp_dir
= comp_dir
;
9486 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
9492 hash_dwo_unit (const void *item
)
9494 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
9496 /* This drops the top 32 bits of the id, but is ok for a hash. */
9497 return dwo_unit
->signature
;
9501 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
9503 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
9504 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
9506 /* The signature is assumed to be unique within the DWO file.
9507 So while object file CU dwo_id's always have the value zero,
9508 that's OK, assuming each object file DWO file has only one CU,
9509 and that's the rule for now. */
9510 return lhs
->signature
== rhs
->signature
;
9513 /* Allocate a hash table for DWO CUs,TUs.
9514 There is one of these tables for each of CUs,TUs for each DWO file. */
9517 allocate_dwo_unit_table (struct objfile
*objfile
)
9519 /* Start out with a pretty small number.
9520 Generally DWO files contain only one CU and maybe some TUs. */
9521 return htab_create_alloc_ex (3,
9525 &objfile
->objfile_obstack
,
9526 hashtab_obstack_allocate
,
9527 dummy_obstack_deallocate
);
9530 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
9532 struct create_dwo_cu_data
9534 struct dwo_file
*dwo_file
;
9535 struct dwo_unit dwo_unit
;
9538 /* die_reader_func for create_dwo_cu. */
9541 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
9542 const gdb_byte
*info_ptr
,
9543 struct die_info
*comp_unit_die
,
9547 struct dwarf2_cu
*cu
= reader
->cu
;
9548 sect_offset offset
= cu
->per_cu
->offset
;
9549 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
9550 struct create_dwo_cu_data
*data
= (struct create_dwo_cu_data
*) datap
;
9551 struct dwo_file
*dwo_file
= data
->dwo_file
;
9552 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
9553 struct attribute
*attr
;
9555 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
9558 complaint (&symfile_complaints
,
9559 _("Dwarf Error: debug entry at offset 0x%x is missing"
9560 " its dwo_id [in module %s]"),
9561 offset
.sect_off
, dwo_file
->dwo_name
);
9565 dwo_unit
->dwo_file
= dwo_file
;
9566 dwo_unit
->signature
= DW_UNSND (attr
);
9567 dwo_unit
->section
= section
;
9568 dwo_unit
->offset
= offset
;
9569 dwo_unit
->length
= cu
->per_cu
->length
;
9571 if (dwarf_read_debug
)
9572 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, dwo_id %s\n",
9573 offset
.sect_off
, hex_string (dwo_unit
->signature
));
9576 /* Create the dwo_unit for the lone CU in DWO_FILE.
9577 Note: This function processes DWO files only, not DWP files. */
9579 static struct dwo_unit
*
9580 create_dwo_cu (struct dwo_file
*dwo_file
)
9582 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9583 struct dwarf2_section_info
*section
= &dwo_file
->sections
.info
;
9584 const gdb_byte
*info_ptr
, *end_ptr
;
9585 struct create_dwo_cu_data create_dwo_cu_data
;
9586 struct dwo_unit
*dwo_unit
;
9588 dwarf2_read_section (objfile
, section
);
9589 info_ptr
= section
->buffer
;
9591 if (info_ptr
== NULL
)
9594 if (dwarf_read_debug
)
9596 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
9597 get_section_name (section
),
9598 get_section_file_name (section
));
9601 create_dwo_cu_data
.dwo_file
= dwo_file
;
9604 end_ptr
= info_ptr
+ section
->size
;
9605 while (info_ptr
< end_ptr
)
9607 struct dwarf2_per_cu_data per_cu
;
9609 memset (&create_dwo_cu_data
.dwo_unit
, 0,
9610 sizeof (create_dwo_cu_data
.dwo_unit
));
9611 memset (&per_cu
, 0, sizeof (per_cu
));
9612 per_cu
.objfile
= objfile
;
9613 per_cu
.is_debug_types
= 0;
9614 per_cu
.offset
.sect_off
= info_ptr
- section
->buffer
;
9615 per_cu
.section
= section
;
9617 init_cutu_and_read_dies_no_follow (&per_cu
, dwo_file
,
9618 create_dwo_cu_reader
,
9619 &create_dwo_cu_data
);
9621 if (create_dwo_cu_data
.dwo_unit
.dwo_file
!= NULL
)
9623 /* If we've already found one, complain. We only support one
9624 because having more than one requires hacking the dwo_name of
9625 each to match, which is highly unlikely to happen. */
9626 if (dwo_unit
!= NULL
)
9628 complaint (&symfile_complaints
,
9629 _("Multiple CUs in DWO file %s [in module %s]"),
9630 dwo_file
->dwo_name
, objfile_name (objfile
));
9634 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
9635 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
9638 info_ptr
+= per_cu
.length
;
9644 /* DWP file .debug_{cu,tu}_index section format:
9645 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
9649 Both index sections have the same format, and serve to map a 64-bit
9650 signature to a set of section numbers. Each section begins with a header,
9651 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
9652 indexes, and a pool of 32-bit section numbers. The index sections will be
9653 aligned at 8-byte boundaries in the file.
9655 The index section header consists of:
9657 V, 32 bit version number
9659 N, 32 bit number of compilation units or type units in the index
9660 M, 32 bit number of slots in the hash table
9662 Numbers are recorded using the byte order of the application binary.
9664 The hash table begins at offset 16 in the section, and consists of an array
9665 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
9666 order of the application binary). Unused slots in the hash table are 0.
9667 (We rely on the extreme unlikeliness of a signature being exactly 0.)
9669 The parallel table begins immediately after the hash table
9670 (at offset 16 + 8 * M from the beginning of the section), and consists of an
9671 array of 32-bit indexes (using the byte order of the application binary),
9672 corresponding 1-1 with slots in the hash table. Each entry in the parallel
9673 table contains a 32-bit index into the pool of section numbers. For unused
9674 hash table slots, the corresponding entry in the parallel table will be 0.
9676 The pool of section numbers begins immediately following the hash table
9677 (at offset 16 + 12 * M from the beginning of the section). The pool of
9678 section numbers consists of an array of 32-bit words (using the byte order
9679 of the application binary). Each item in the array is indexed starting
9680 from 0. The hash table entry provides the index of the first section
9681 number in the set. Additional section numbers in the set follow, and the
9682 set is terminated by a 0 entry (section number 0 is not used in ELF).
9684 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
9685 section must be the first entry in the set, and the .debug_abbrev.dwo must
9686 be the second entry. Other members of the set may follow in any order.
9692 DWP Version 2 combines all the .debug_info, etc. sections into one,
9693 and the entries in the index tables are now offsets into these sections.
9694 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
9697 Index Section Contents:
9699 Hash Table of Signatures dwp_hash_table.hash_table
9700 Parallel Table of Indices dwp_hash_table.unit_table
9701 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
9702 Table of Section Sizes dwp_hash_table.v2.sizes
9704 The index section header consists of:
9706 V, 32 bit version number
9707 L, 32 bit number of columns in the table of section offsets
9708 N, 32 bit number of compilation units or type units in the index
9709 M, 32 bit number of slots in the hash table
9711 Numbers are recorded using the byte order of the application binary.
9713 The hash table has the same format as version 1.
9714 The parallel table of indices has the same format as version 1,
9715 except that the entries are origin-1 indices into the table of sections
9716 offsets and the table of section sizes.
9718 The table of offsets begins immediately following the parallel table
9719 (at offset 16 + 12 * M from the beginning of the section). The table is
9720 a two-dimensional array of 32-bit words (using the byte order of the
9721 application binary), with L columns and N+1 rows, in row-major order.
9722 Each row in the array is indexed starting from 0. The first row provides
9723 a key to the remaining rows: each column in this row provides an identifier
9724 for a debug section, and the offsets in the same column of subsequent rows
9725 refer to that section. The section identifiers are:
9727 DW_SECT_INFO 1 .debug_info.dwo
9728 DW_SECT_TYPES 2 .debug_types.dwo
9729 DW_SECT_ABBREV 3 .debug_abbrev.dwo
9730 DW_SECT_LINE 4 .debug_line.dwo
9731 DW_SECT_LOC 5 .debug_loc.dwo
9732 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
9733 DW_SECT_MACINFO 7 .debug_macinfo.dwo
9734 DW_SECT_MACRO 8 .debug_macro.dwo
9736 The offsets provided by the CU and TU index sections are the base offsets
9737 for the contributions made by each CU or TU to the corresponding section
9738 in the package file. Each CU and TU header contains an abbrev_offset
9739 field, used to find the abbreviations table for that CU or TU within the
9740 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
9741 be interpreted as relative to the base offset given in the index section.
9742 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
9743 should be interpreted as relative to the base offset for .debug_line.dwo,
9744 and offsets into other debug sections obtained from DWARF attributes should
9745 also be interpreted as relative to the corresponding base offset.
9747 The table of sizes begins immediately following the table of offsets.
9748 Like the table of offsets, it is a two-dimensional array of 32-bit words,
9749 with L columns and N rows, in row-major order. Each row in the array is
9750 indexed starting from 1 (row 0 is shared by the two tables).
9754 Hash table lookup is handled the same in version 1 and 2:
9756 We assume that N and M will not exceed 2^32 - 1.
9757 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
9759 Given a 64-bit compilation unit signature or a type signature S, an entry
9760 in the hash table is located as follows:
9762 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
9763 the low-order k bits all set to 1.
9765 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
9767 3) If the hash table entry at index H matches the signature, use that
9768 entry. If the hash table entry at index H is unused (all zeroes),
9769 terminate the search: the signature is not present in the table.
9771 4) Let H = (H + H') modulo M. Repeat at Step 3.
9773 Because M > N and H' and M are relatively prime, the search is guaranteed
9774 to stop at an unused slot or find the match. */
9776 /* Create a hash table to map DWO IDs to their CU/TU entry in
9777 .debug_{info,types}.dwo in DWP_FILE.
9778 Returns NULL if there isn't one.
9779 Note: This function processes DWP files only, not DWO files. */
9781 static struct dwp_hash_table
*
9782 create_dwp_hash_table (struct dwp_file
*dwp_file
, int is_debug_types
)
9784 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9785 bfd
*dbfd
= dwp_file
->dbfd
;
9786 const gdb_byte
*index_ptr
, *index_end
;
9787 struct dwarf2_section_info
*index
;
9788 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
9789 struct dwp_hash_table
*htab
;
9792 index
= &dwp_file
->sections
.tu_index
;
9794 index
= &dwp_file
->sections
.cu_index
;
9796 if (dwarf2_section_empty_p (index
))
9798 dwarf2_read_section (objfile
, index
);
9800 index_ptr
= index
->buffer
;
9801 index_end
= index_ptr
+ index
->size
;
9803 version
= read_4_bytes (dbfd
, index_ptr
);
9806 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
9810 nr_units
= read_4_bytes (dbfd
, index_ptr
);
9812 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
9815 if (version
!= 1 && version
!= 2)
9817 error (_("Dwarf Error: unsupported DWP file version (%s)"
9819 pulongest (version
), dwp_file
->name
);
9821 if (nr_slots
!= (nr_slots
& -nr_slots
))
9823 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
9824 " is not power of 2 [in module %s]"),
9825 pulongest (nr_slots
), dwp_file
->name
);
9828 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
9829 htab
->version
= version
;
9830 htab
->nr_columns
= nr_columns
;
9831 htab
->nr_units
= nr_units
;
9832 htab
->nr_slots
= nr_slots
;
9833 htab
->hash_table
= index_ptr
;
9834 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
9836 /* Exit early if the table is empty. */
9837 if (nr_slots
== 0 || nr_units
== 0
9838 || (version
== 2 && nr_columns
== 0))
9840 /* All must be zero. */
9841 if (nr_slots
!= 0 || nr_units
!= 0
9842 || (version
== 2 && nr_columns
!= 0))
9844 complaint (&symfile_complaints
,
9845 _("Empty DWP but nr_slots,nr_units,nr_columns not"
9846 " all zero [in modules %s]"),
9854 htab
->section_pool
.v1
.indices
=
9855 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
9856 /* It's harder to decide whether the section is too small in v1.
9857 V1 is deprecated anyway so we punt. */
9861 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
9862 int *ids
= htab
->section_pool
.v2
.section_ids
;
9863 /* Reverse map for error checking. */
9864 int ids_seen
[DW_SECT_MAX
+ 1];
9869 error (_("Dwarf Error: bad DWP hash table, too few columns"
9870 " in section table [in module %s]"),
9873 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
9875 error (_("Dwarf Error: bad DWP hash table, too many columns"
9876 " in section table [in module %s]"),
9879 memset (ids
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
9880 memset (ids_seen
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
9881 for (i
= 0; i
< nr_columns
; ++i
)
9883 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
9885 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
9887 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
9888 " in section table [in module %s]"),
9889 id
, dwp_file
->name
);
9891 if (ids_seen
[id
] != -1)
9893 error (_("Dwarf Error: bad DWP hash table, duplicate section"
9894 " id %d in section table [in module %s]"),
9895 id
, dwp_file
->name
);
9900 /* Must have exactly one info or types section. */
9901 if (((ids_seen
[DW_SECT_INFO
] != -1)
9902 + (ids_seen
[DW_SECT_TYPES
] != -1))
9905 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
9906 " DWO info/types section [in module %s]"),
9909 /* Must have an abbrev section. */
9910 if (ids_seen
[DW_SECT_ABBREV
] == -1)
9912 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
9913 " section [in module %s]"),
9916 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
9917 htab
->section_pool
.v2
.sizes
=
9918 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
9919 * nr_units
* nr_columns
);
9920 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
9921 * nr_units
* nr_columns
))
9924 error (_("Dwarf Error: DWP index section is corrupt (too small)"
9933 /* Update SECTIONS with the data from SECTP.
9935 This function is like the other "locate" section routines that are
9936 passed to bfd_map_over_sections, but in this context the sections to
9937 read comes from the DWP V1 hash table, not the full ELF section table.
9939 The result is non-zero for success, or zero if an error was found. */
9942 locate_v1_virtual_dwo_sections (asection
*sectp
,
9943 struct virtual_v1_dwo_sections
*sections
)
9945 const struct dwop_section_names
*names
= &dwop_section_names
;
9947 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
9949 /* There can be only one. */
9950 if (sections
->abbrev
.s
.section
!= NULL
)
9952 sections
->abbrev
.s
.section
= sectp
;
9953 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
9955 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
9956 || section_is_p (sectp
->name
, &names
->types_dwo
))
9958 /* There can be only one. */
9959 if (sections
->info_or_types
.s
.section
!= NULL
)
9961 sections
->info_or_types
.s
.section
= sectp
;
9962 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
9964 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
9966 /* There can be only one. */
9967 if (sections
->line
.s
.section
!= NULL
)
9969 sections
->line
.s
.section
= sectp
;
9970 sections
->line
.size
= bfd_get_section_size (sectp
);
9972 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
9974 /* There can be only one. */
9975 if (sections
->loc
.s
.section
!= NULL
)
9977 sections
->loc
.s
.section
= sectp
;
9978 sections
->loc
.size
= bfd_get_section_size (sectp
);
9980 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
9982 /* There can be only one. */
9983 if (sections
->macinfo
.s
.section
!= NULL
)
9985 sections
->macinfo
.s
.section
= sectp
;
9986 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
9988 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
9990 /* There can be only one. */
9991 if (sections
->macro
.s
.section
!= NULL
)
9993 sections
->macro
.s
.section
= sectp
;
9994 sections
->macro
.size
= bfd_get_section_size (sectp
);
9996 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
9998 /* There can be only one. */
9999 if (sections
->str_offsets
.s
.section
!= NULL
)
10001 sections
->str_offsets
.s
.section
= sectp
;
10002 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
10006 /* No other kind of section is valid. */
10013 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
10014 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
10015 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
10016 This is for DWP version 1 files. */
10018 static struct dwo_unit
*
10019 create_dwo_unit_in_dwp_v1 (struct dwp_file
*dwp_file
,
10020 uint32_t unit_index
,
10021 const char *comp_dir
,
10022 ULONGEST signature
, int is_debug_types
)
10024 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10025 const struct dwp_hash_table
*dwp_htab
=
10026 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10027 bfd
*dbfd
= dwp_file
->dbfd
;
10028 const char *kind
= is_debug_types
? "TU" : "CU";
10029 struct dwo_file
*dwo_file
;
10030 struct dwo_unit
*dwo_unit
;
10031 struct virtual_v1_dwo_sections sections
;
10032 void **dwo_file_slot
;
10033 char *virtual_dwo_name
;
10034 struct cleanup
*cleanups
;
10037 gdb_assert (dwp_file
->version
== 1);
10039 if (dwarf_read_debug
)
10041 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
10043 pulongest (unit_index
), hex_string (signature
),
10047 /* Fetch the sections of this DWO unit.
10048 Put a limit on the number of sections we look for so that bad data
10049 doesn't cause us to loop forever. */
10051 #define MAX_NR_V1_DWO_SECTIONS \
10052 (1 /* .debug_info or .debug_types */ \
10053 + 1 /* .debug_abbrev */ \
10054 + 1 /* .debug_line */ \
10055 + 1 /* .debug_loc */ \
10056 + 1 /* .debug_str_offsets */ \
10057 + 1 /* .debug_macro or .debug_macinfo */ \
10058 + 1 /* trailing zero */)
10060 memset (§ions
, 0, sizeof (sections
));
10061 cleanups
= make_cleanup (null_cleanup
, 0);
10063 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
10066 uint32_t section_nr
=
10067 read_4_bytes (dbfd
,
10068 dwp_htab
->section_pool
.v1
.indices
10069 + (unit_index
+ i
) * sizeof (uint32_t));
10071 if (section_nr
== 0)
10073 if (section_nr
>= dwp_file
->num_sections
)
10075 error (_("Dwarf Error: bad DWP hash table, section number too large"
10076 " [in module %s]"),
10080 sectp
= dwp_file
->elf_sections
[section_nr
];
10081 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
10083 error (_("Dwarf Error: bad DWP hash table, invalid section found"
10084 " [in module %s]"),
10090 || dwarf2_section_empty_p (§ions
.info_or_types
)
10091 || dwarf2_section_empty_p (§ions
.abbrev
))
10093 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
10094 " [in module %s]"),
10097 if (i
== MAX_NR_V1_DWO_SECTIONS
)
10099 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
10100 " [in module %s]"),
10104 /* It's easier for the rest of the code if we fake a struct dwo_file and
10105 have dwo_unit "live" in that. At least for now.
10107 The DWP file can be made up of a random collection of CUs and TUs.
10108 However, for each CU + set of TUs that came from the same original DWO
10109 file, we can combine them back into a virtual DWO file to save space
10110 (fewer struct dwo_file objects to allocate). Remember that for really
10111 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10114 xstrprintf ("virtual-dwo/%d-%d-%d-%d",
10115 get_section_id (§ions
.abbrev
),
10116 get_section_id (§ions
.line
),
10117 get_section_id (§ions
.loc
),
10118 get_section_id (§ions
.str_offsets
));
10119 make_cleanup (xfree
, virtual_dwo_name
);
10120 /* Can we use an existing virtual DWO file? */
10121 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
10122 /* Create one if necessary. */
10123 if (*dwo_file_slot
== NULL
)
10125 if (dwarf_read_debug
)
10127 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
10130 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10132 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
10134 strlen (virtual_dwo_name
));
10135 dwo_file
->comp_dir
= comp_dir
;
10136 dwo_file
->sections
.abbrev
= sections
.abbrev
;
10137 dwo_file
->sections
.line
= sections
.line
;
10138 dwo_file
->sections
.loc
= sections
.loc
;
10139 dwo_file
->sections
.macinfo
= sections
.macinfo
;
10140 dwo_file
->sections
.macro
= sections
.macro
;
10141 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
10142 /* The "str" section is global to the entire DWP file. */
10143 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10144 /* The info or types section is assigned below to dwo_unit,
10145 there's no need to record it in dwo_file.
10146 Also, we can't simply record type sections in dwo_file because
10147 we record a pointer into the vector in dwo_unit. As we collect more
10148 types we'll grow the vector and eventually have to reallocate space
10149 for it, invalidating all copies of pointers into the previous
10151 *dwo_file_slot
= dwo_file
;
10155 if (dwarf_read_debug
)
10157 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10160 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
10162 do_cleanups (cleanups
);
10164 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10165 dwo_unit
->dwo_file
= dwo_file
;
10166 dwo_unit
->signature
= signature
;
10167 dwo_unit
->section
=
10168 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
10169 *dwo_unit
->section
= sections
.info_or_types
;
10170 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10175 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
10176 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
10177 piece within that section used by a TU/CU, return a virtual section
10178 of just that piece. */
10180 static struct dwarf2_section_info
10181 create_dwp_v2_section (struct dwarf2_section_info
*section
,
10182 bfd_size_type offset
, bfd_size_type size
)
10184 struct dwarf2_section_info result
;
10187 gdb_assert (section
!= NULL
);
10188 gdb_assert (!section
->is_virtual
);
10190 memset (&result
, 0, sizeof (result
));
10191 result
.s
.containing_section
= section
;
10192 result
.is_virtual
= 1;
10197 sectp
= get_section_bfd_section (section
);
10199 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
10200 bounds of the real section. This is a pretty-rare event, so just
10201 flag an error (easier) instead of a warning and trying to cope. */
10203 || offset
+ size
> bfd_get_section_size (sectp
))
10205 bfd
*abfd
= sectp
->owner
;
10207 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
10208 " in section %s [in module %s]"),
10209 sectp
? bfd_section_name (abfd
, sectp
) : "<unknown>",
10210 objfile_name (dwarf2_per_objfile
->objfile
));
10213 result
.virtual_offset
= offset
;
10214 result
.size
= size
;
10218 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
10219 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
10220 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
10221 This is for DWP version 2 files. */
10223 static struct dwo_unit
*
10224 create_dwo_unit_in_dwp_v2 (struct dwp_file
*dwp_file
,
10225 uint32_t unit_index
,
10226 const char *comp_dir
,
10227 ULONGEST signature
, int is_debug_types
)
10229 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10230 const struct dwp_hash_table
*dwp_htab
=
10231 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10232 bfd
*dbfd
= dwp_file
->dbfd
;
10233 const char *kind
= is_debug_types
? "TU" : "CU";
10234 struct dwo_file
*dwo_file
;
10235 struct dwo_unit
*dwo_unit
;
10236 struct virtual_v2_dwo_sections sections
;
10237 void **dwo_file_slot
;
10238 char *virtual_dwo_name
;
10239 struct cleanup
*cleanups
;
10242 gdb_assert (dwp_file
->version
== 2);
10244 if (dwarf_read_debug
)
10246 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
10248 pulongest (unit_index
), hex_string (signature
),
10252 /* Fetch the section offsets of this DWO unit. */
10254 memset (§ions
, 0, sizeof (sections
));
10255 cleanups
= make_cleanup (null_cleanup
, 0);
10257 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
10259 uint32_t offset
= read_4_bytes (dbfd
,
10260 dwp_htab
->section_pool
.v2
.offsets
10261 + (((unit_index
- 1) * dwp_htab
->nr_columns
10263 * sizeof (uint32_t)));
10264 uint32_t size
= read_4_bytes (dbfd
,
10265 dwp_htab
->section_pool
.v2
.sizes
10266 + (((unit_index
- 1) * dwp_htab
->nr_columns
10268 * sizeof (uint32_t)));
10270 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
10273 case DW_SECT_TYPES
:
10274 sections
.info_or_types_offset
= offset
;
10275 sections
.info_or_types_size
= size
;
10277 case DW_SECT_ABBREV
:
10278 sections
.abbrev_offset
= offset
;
10279 sections
.abbrev_size
= size
;
10282 sections
.line_offset
= offset
;
10283 sections
.line_size
= size
;
10286 sections
.loc_offset
= offset
;
10287 sections
.loc_size
= size
;
10289 case DW_SECT_STR_OFFSETS
:
10290 sections
.str_offsets_offset
= offset
;
10291 sections
.str_offsets_size
= size
;
10293 case DW_SECT_MACINFO
:
10294 sections
.macinfo_offset
= offset
;
10295 sections
.macinfo_size
= size
;
10297 case DW_SECT_MACRO
:
10298 sections
.macro_offset
= offset
;
10299 sections
.macro_size
= size
;
10304 /* It's easier for the rest of the code if we fake a struct dwo_file and
10305 have dwo_unit "live" in that. At least for now.
10307 The DWP file can be made up of a random collection of CUs and TUs.
10308 However, for each CU + set of TUs that came from the same original DWO
10309 file, we can combine them back into a virtual DWO file to save space
10310 (fewer struct dwo_file objects to allocate). Remember that for really
10311 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10314 xstrprintf ("virtual-dwo/%ld-%ld-%ld-%ld",
10315 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
10316 (long) (sections
.line_size
? sections
.line_offset
: 0),
10317 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
10318 (long) (sections
.str_offsets_size
10319 ? sections
.str_offsets_offset
: 0));
10320 make_cleanup (xfree
, virtual_dwo_name
);
10321 /* Can we use an existing virtual DWO file? */
10322 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
10323 /* Create one if necessary. */
10324 if (*dwo_file_slot
== NULL
)
10326 if (dwarf_read_debug
)
10328 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
10331 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10333 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
10335 strlen (virtual_dwo_name
));
10336 dwo_file
->comp_dir
= comp_dir
;
10337 dwo_file
->sections
.abbrev
=
10338 create_dwp_v2_section (&dwp_file
->sections
.abbrev
,
10339 sections
.abbrev_offset
, sections
.abbrev_size
);
10340 dwo_file
->sections
.line
=
10341 create_dwp_v2_section (&dwp_file
->sections
.line
,
10342 sections
.line_offset
, sections
.line_size
);
10343 dwo_file
->sections
.loc
=
10344 create_dwp_v2_section (&dwp_file
->sections
.loc
,
10345 sections
.loc_offset
, sections
.loc_size
);
10346 dwo_file
->sections
.macinfo
=
10347 create_dwp_v2_section (&dwp_file
->sections
.macinfo
,
10348 sections
.macinfo_offset
, sections
.macinfo_size
);
10349 dwo_file
->sections
.macro
=
10350 create_dwp_v2_section (&dwp_file
->sections
.macro
,
10351 sections
.macro_offset
, sections
.macro_size
);
10352 dwo_file
->sections
.str_offsets
=
10353 create_dwp_v2_section (&dwp_file
->sections
.str_offsets
,
10354 sections
.str_offsets_offset
,
10355 sections
.str_offsets_size
);
10356 /* The "str" section is global to the entire DWP file. */
10357 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10358 /* The info or types section is assigned below to dwo_unit,
10359 there's no need to record it in dwo_file.
10360 Also, we can't simply record type sections in dwo_file because
10361 we record a pointer into the vector in dwo_unit. As we collect more
10362 types we'll grow the vector and eventually have to reallocate space
10363 for it, invalidating all copies of pointers into the previous
10365 *dwo_file_slot
= dwo_file
;
10369 if (dwarf_read_debug
)
10371 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10374 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
10376 do_cleanups (cleanups
);
10378 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10379 dwo_unit
->dwo_file
= dwo_file
;
10380 dwo_unit
->signature
= signature
;
10381 dwo_unit
->section
=
10382 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
10383 *dwo_unit
->section
= create_dwp_v2_section (is_debug_types
10384 ? &dwp_file
->sections
.types
10385 : &dwp_file
->sections
.info
,
10386 sections
.info_or_types_offset
,
10387 sections
.info_or_types_size
);
10388 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10393 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
10394 Returns NULL if the signature isn't found. */
10396 static struct dwo_unit
*
10397 lookup_dwo_unit_in_dwp (struct dwp_file
*dwp_file
, const char *comp_dir
,
10398 ULONGEST signature
, int is_debug_types
)
10400 const struct dwp_hash_table
*dwp_htab
=
10401 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10402 bfd
*dbfd
= dwp_file
->dbfd
;
10403 uint32_t mask
= dwp_htab
->nr_slots
- 1;
10404 uint32_t hash
= signature
& mask
;
10405 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
10408 struct dwo_unit find_dwo_cu
;
10410 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
10411 find_dwo_cu
.signature
= signature
;
10412 slot
= htab_find_slot (is_debug_types
10413 ? dwp_file
->loaded_tus
10414 : dwp_file
->loaded_cus
,
10415 &find_dwo_cu
, INSERT
);
10418 return (struct dwo_unit
*) *slot
;
10420 /* Use a for loop so that we don't loop forever on bad debug info. */
10421 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
10423 ULONGEST signature_in_table
;
10425 signature_in_table
=
10426 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
10427 if (signature_in_table
== signature
)
10429 uint32_t unit_index
=
10430 read_4_bytes (dbfd
,
10431 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
10433 if (dwp_file
->version
== 1)
10435 *slot
= create_dwo_unit_in_dwp_v1 (dwp_file
, unit_index
,
10436 comp_dir
, signature
,
10441 *slot
= create_dwo_unit_in_dwp_v2 (dwp_file
, unit_index
,
10442 comp_dir
, signature
,
10445 return (struct dwo_unit
*) *slot
;
10447 if (signature_in_table
== 0)
10449 hash
= (hash
+ hash2
) & mask
;
10452 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
10453 " [in module %s]"),
10457 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
10458 Open the file specified by FILE_NAME and hand it off to BFD for
10459 preliminary analysis. Return a newly initialized bfd *, which
10460 includes a canonicalized copy of FILE_NAME.
10461 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
10462 SEARCH_CWD is true if the current directory is to be searched.
10463 It will be searched before debug-file-directory.
10464 If successful, the file is added to the bfd include table of the
10465 objfile's bfd (see gdb_bfd_record_inclusion).
10466 If unable to find/open the file, return NULL.
10467 NOTE: This function is derived from symfile_bfd_open. */
10470 try_open_dwop_file (const char *file_name
, int is_dwp
, int search_cwd
)
10474 char *absolute_name
;
10475 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
10476 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
10477 to debug_file_directory. */
10479 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
10483 if (*debug_file_directory
!= '\0')
10484 search_path
= concat (".", dirname_separator_string
,
10485 debug_file_directory
, (char *) NULL
);
10487 search_path
= xstrdup (".");
10490 search_path
= xstrdup (debug_file_directory
);
10492 flags
= OPF_RETURN_REALPATH
;
10494 flags
|= OPF_SEARCH_IN_PATH
;
10495 desc
= openp (search_path
, flags
, file_name
,
10496 O_RDONLY
| O_BINARY
, &absolute_name
);
10497 xfree (search_path
);
10501 sym_bfd
= gdb_bfd_open (absolute_name
, gnutarget
, desc
);
10502 xfree (absolute_name
);
10503 if (sym_bfd
== NULL
)
10505 bfd_set_cacheable (sym_bfd
, 1);
10507 if (!bfd_check_format (sym_bfd
, bfd_object
))
10509 gdb_bfd_unref (sym_bfd
); /* This also closes desc. */
10513 /* Success. Record the bfd as having been included by the objfile's bfd.
10514 This is important because things like demangled_names_hash lives in the
10515 objfile's per_bfd space and may have references to things like symbol
10516 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
10517 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
);
10522 /* Try to open DWO file FILE_NAME.
10523 COMP_DIR is the DW_AT_comp_dir attribute.
10524 The result is the bfd handle of the file.
10525 If there is a problem finding or opening the file, return NULL.
10526 Upon success, the canonicalized path of the file is stored in the bfd,
10527 same as symfile_bfd_open. */
10530 open_dwo_file (const char *file_name
, const char *comp_dir
)
10534 if (IS_ABSOLUTE_PATH (file_name
))
10535 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 0 /*search_cwd*/);
10537 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
10539 if (comp_dir
!= NULL
)
10541 char *path_to_try
= concat (comp_dir
, SLASH_STRING
,
10542 file_name
, (char *) NULL
);
10544 /* NOTE: If comp_dir is a relative path, this will also try the
10545 search path, which seems useful. */
10546 abfd
= try_open_dwop_file (path_to_try
, 0 /*is_dwp*/, 1 /*search_cwd*/);
10547 xfree (path_to_try
);
10552 /* That didn't work, try debug-file-directory, which, despite its name,
10553 is a list of paths. */
10555 if (*debug_file_directory
== '\0')
10558 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 1 /*search_cwd*/);
10561 /* This function is mapped across the sections and remembers the offset and
10562 size of each of the DWO debugging sections we are interested in. */
10565 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
10567 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
10568 const struct dwop_section_names
*names
= &dwop_section_names
;
10570 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10572 dwo_sections
->abbrev
.s
.section
= sectp
;
10573 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
10575 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
10577 dwo_sections
->info
.s
.section
= sectp
;
10578 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
10580 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10582 dwo_sections
->line
.s
.section
= sectp
;
10583 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
10585 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10587 dwo_sections
->loc
.s
.section
= sectp
;
10588 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
10590 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10592 dwo_sections
->macinfo
.s
.section
= sectp
;
10593 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
10595 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10597 dwo_sections
->macro
.s
.section
= sectp
;
10598 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
10600 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
10602 dwo_sections
->str
.s
.section
= sectp
;
10603 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
10605 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10607 dwo_sections
->str_offsets
.s
.section
= sectp
;
10608 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
10610 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
10612 struct dwarf2_section_info type_section
;
10614 memset (&type_section
, 0, sizeof (type_section
));
10615 type_section
.s
.section
= sectp
;
10616 type_section
.size
= bfd_get_section_size (sectp
);
10617 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
10622 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
10623 by PER_CU. This is for the non-DWP case.
10624 The result is NULL if DWO_NAME can't be found. */
10626 static struct dwo_file
*
10627 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
10628 const char *dwo_name
, const char *comp_dir
)
10630 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10631 struct dwo_file
*dwo_file
;
10633 struct cleanup
*cleanups
;
10635 dbfd
= open_dwo_file (dwo_name
, comp_dir
);
10638 if (dwarf_read_debug
)
10639 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
10642 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10643 dwo_file
->dwo_name
= dwo_name
;
10644 dwo_file
->comp_dir
= comp_dir
;
10645 dwo_file
->dbfd
= dbfd
;
10647 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwo_file
);
10649 bfd_map_over_sections (dbfd
, dwarf2_locate_dwo_sections
, &dwo_file
->sections
);
10651 dwo_file
->cu
= create_dwo_cu (dwo_file
);
10653 dwo_file
->tus
= create_debug_types_hash_table (dwo_file
,
10654 dwo_file
->sections
.types
);
10656 discard_cleanups (cleanups
);
10658 if (dwarf_read_debug
)
10659 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
10664 /* This function is mapped across the sections and remembers the offset and
10665 size of each of the DWP debugging sections common to version 1 and 2 that
10666 we are interested in. */
10669 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
10670 void *dwp_file_ptr
)
10672 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
10673 const struct dwop_section_names
*names
= &dwop_section_names
;
10674 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
10676 /* Record the ELF section number for later lookup: this is what the
10677 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10678 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
10679 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
10681 /* Look for specific sections that we need. */
10682 if (section_is_p (sectp
->name
, &names
->str_dwo
))
10684 dwp_file
->sections
.str
.s
.section
= sectp
;
10685 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
10687 else if (section_is_p (sectp
->name
, &names
->cu_index
))
10689 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
10690 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
10692 else if (section_is_p (sectp
->name
, &names
->tu_index
))
10694 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
10695 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
10699 /* This function is mapped across the sections and remembers the offset and
10700 size of each of the DWP version 2 debugging sections that we are interested
10701 in. This is split into a separate function because we don't know if we
10702 have version 1 or 2 until we parse the cu_index/tu_index sections. */
10705 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
10707 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
10708 const struct dwop_section_names
*names
= &dwop_section_names
;
10709 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
10711 /* Record the ELF section number for later lookup: this is what the
10712 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10713 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
10714 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
10716 /* Look for specific sections that we need. */
10717 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10719 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
10720 dwp_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
10722 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
10724 dwp_file
->sections
.info
.s
.section
= sectp
;
10725 dwp_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
10727 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10729 dwp_file
->sections
.line
.s
.section
= sectp
;
10730 dwp_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
10732 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10734 dwp_file
->sections
.loc
.s
.section
= sectp
;
10735 dwp_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
10737 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10739 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
10740 dwp_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
10742 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10744 dwp_file
->sections
.macro
.s
.section
= sectp
;
10745 dwp_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
10747 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10749 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
10750 dwp_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
10752 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
10754 dwp_file
->sections
.types
.s
.section
= sectp
;
10755 dwp_file
->sections
.types
.size
= bfd_get_section_size (sectp
);
10759 /* Hash function for dwp_file loaded CUs/TUs. */
10762 hash_dwp_loaded_cutus (const void *item
)
10764 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
10766 /* This drops the top 32 bits of the signature, but is ok for a hash. */
10767 return dwo_unit
->signature
;
10770 /* Equality function for dwp_file loaded CUs/TUs. */
10773 eq_dwp_loaded_cutus (const void *a
, const void *b
)
10775 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
10776 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
10778 return dua
->signature
== dub
->signature
;
10781 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
10784 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
10786 return htab_create_alloc_ex (3,
10787 hash_dwp_loaded_cutus
,
10788 eq_dwp_loaded_cutus
,
10790 &objfile
->objfile_obstack
,
10791 hashtab_obstack_allocate
,
10792 dummy_obstack_deallocate
);
10795 /* Try to open DWP file FILE_NAME.
10796 The result is the bfd handle of the file.
10797 If there is a problem finding or opening the file, return NULL.
10798 Upon success, the canonicalized path of the file is stored in the bfd,
10799 same as symfile_bfd_open. */
10802 open_dwp_file (const char *file_name
)
10806 abfd
= try_open_dwop_file (file_name
, 1 /*is_dwp*/, 1 /*search_cwd*/);
10810 /* Work around upstream bug 15652.
10811 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
10812 [Whether that's a "bug" is debatable, but it is getting in our way.]
10813 We have no real idea where the dwp file is, because gdb's realpath-ing
10814 of the executable's path may have discarded the needed info.
10815 [IWBN if the dwp file name was recorded in the executable, akin to
10816 .gnu_debuglink, but that doesn't exist yet.]
10817 Strip the directory from FILE_NAME and search again. */
10818 if (*debug_file_directory
!= '\0')
10820 /* Don't implicitly search the current directory here.
10821 If the user wants to search "." to handle this case,
10822 it must be added to debug-file-directory. */
10823 return try_open_dwop_file (lbasename (file_name
), 1 /*is_dwp*/,
10830 /* Initialize the use of the DWP file for the current objfile.
10831 By convention the name of the DWP file is ${objfile}.dwp.
10832 The result is NULL if it can't be found. */
10834 static struct dwp_file
*
10835 open_and_init_dwp_file (void)
10837 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10838 struct dwp_file
*dwp_file
;
10841 struct cleanup
*cleanups
= make_cleanup (null_cleanup
, 0);
10843 /* Try to find first .dwp for the binary file before any symbolic links
10846 /* If the objfile is a debug file, find the name of the real binary
10847 file and get the name of dwp file from there. */
10848 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
10850 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
10851 const char *backlink_basename
= lbasename (backlink
->original_name
);
10852 char *debug_dirname
= ldirname (objfile
->original_name
);
10854 make_cleanup (xfree
, debug_dirname
);
10855 dwp_name
= xstrprintf ("%s%s%s.dwp", debug_dirname
,
10856 SLASH_STRING
, backlink_basename
);
10859 dwp_name
= xstrprintf ("%s.dwp", objfile
->original_name
);
10860 make_cleanup (xfree
, dwp_name
);
10862 dbfd
= open_dwp_file (dwp_name
);
10864 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
10866 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
10867 dwp_name
= xstrprintf ("%s.dwp", objfile_name (objfile
));
10868 make_cleanup (xfree
, dwp_name
);
10869 dbfd
= open_dwp_file (dwp_name
);
10874 if (dwarf_read_debug
)
10875 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
);
10876 do_cleanups (cleanups
);
10879 dwp_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_file
);
10880 dwp_file
->name
= bfd_get_filename (dbfd
);
10881 dwp_file
->dbfd
= dbfd
;
10882 do_cleanups (cleanups
);
10884 /* +1: section 0 is unused */
10885 dwp_file
->num_sections
= bfd_count_sections (dbfd
) + 1;
10886 dwp_file
->elf_sections
=
10887 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
10888 dwp_file
->num_sections
, asection
*);
10890 bfd_map_over_sections (dbfd
, dwarf2_locate_common_dwp_sections
, dwp_file
);
10892 dwp_file
->cus
= create_dwp_hash_table (dwp_file
, 0);
10894 dwp_file
->tus
= create_dwp_hash_table (dwp_file
, 1);
10896 /* The DWP file version is stored in the hash table. Oh well. */
10897 if (dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
10899 /* Technically speaking, we should try to limp along, but this is
10900 pretty bizarre. We use pulongest here because that's the established
10901 portability solution (e.g, we cannot use %u for uint32_t). */
10902 error (_("Dwarf Error: DWP file CU version %s doesn't match"
10903 " TU version %s [in DWP file %s]"),
10904 pulongest (dwp_file
->cus
->version
),
10905 pulongest (dwp_file
->tus
->version
), dwp_name
);
10907 dwp_file
->version
= dwp_file
->cus
->version
;
10909 if (dwp_file
->version
== 2)
10910 bfd_map_over_sections (dbfd
, dwarf2_locate_v2_dwp_sections
, dwp_file
);
10912 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
10913 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
10915 if (dwarf_read_debug
)
10917 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
10918 fprintf_unfiltered (gdb_stdlog
,
10919 " %s CUs, %s TUs\n",
10920 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
10921 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
10927 /* Wrapper around open_and_init_dwp_file, only open it once. */
10929 static struct dwp_file
*
10930 get_dwp_file (void)
10932 if (! dwarf2_per_objfile
->dwp_checked
)
10934 dwarf2_per_objfile
->dwp_file
= open_and_init_dwp_file ();
10935 dwarf2_per_objfile
->dwp_checked
= 1;
10937 return dwarf2_per_objfile
->dwp_file
;
10940 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
10941 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
10942 or in the DWP file for the objfile, referenced by THIS_UNIT.
10943 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
10944 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
10946 This is called, for example, when wanting to read a variable with a
10947 complex location. Therefore we don't want to do file i/o for every call.
10948 Therefore we don't want to look for a DWO file on every call.
10949 Therefore we first see if we've already seen SIGNATURE in a DWP file,
10950 then we check if we've already seen DWO_NAME, and only THEN do we check
10953 The result is a pointer to the dwo_unit object or NULL if we didn't find it
10954 (dwo_id mismatch or couldn't find the DWO/DWP file). */
10956 static struct dwo_unit
*
10957 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
10958 const char *dwo_name
, const char *comp_dir
,
10959 ULONGEST signature
, int is_debug_types
)
10961 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10962 const char *kind
= is_debug_types
? "TU" : "CU";
10963 void **dwo_file_slot
;
10964 struct dwo_file
*dwo_file
;
10965 struct dwp_file
*dwp_file
;
10967 /* First see if there's a DWP file.
10968 If we have a DWP file but didn't find the DWO inside it, don't
10969 look for the original DWO file. It makes gdb behave differently
10970 depending on whether one is debugging in the build tree. */
10972 dwp_file
= get_dwp_file ();
10973 if (dwp_file
!= NULL
)
10975 const struct dwp_hash_table
*dwp_htab
=
10976 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10978 if (dwp_htab
!= NULL
)
10980 struct dwo_unit
*dwo_cutu
=
10981 lookup_dwo_unit_in_dwp (dwp_file
, comp_dir
,
10982 signature
, is_debug_types
);
10984 if (dwo_cutu
!= NULL
)
10986 if (dwarf_read_debug
)
10988 fprintf_unfiltered (gdb_stdlog
,
10989 "Virtual DWO %s %s found: @%s\n",
10990 kind
, hex_string (signature
),
10991 host_address_to_string (dwo_cutu
));
10999 /* No DWP file, look for the DWO file. */
11001 dwo_file_slot
= lookup_dwo_file_slot (dwo_name
, comp_dir
);
11002 if (*dwo_file_slot
== NULL
)
11004 /* Read in the file and build a table of the CUs/TUs it contains. */
11005 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
11007 /* NOTE: This will be NULL if unable to open the file. */
11008 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
11010 if (dwo_file
!= NULL
)
11012 struct dwo_unit
*dwo_cutu
= NULL
;
11014 if (is_debug_types
&& dwo_file
->tus
)
11016 struct dwo_unit find_dwo_cutu
;
11018 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
11019 find_dwo_cutu
.signature
= signature
;
11021 = (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_cutu
);
11023 else if (!is_debug_types
&& dwo_file
->cu
)
11025 if (signature
== dwo_file
->cu
->signature
)
11026 dwo_cutu
= dwo_file
->cu
;
11029 if (dwo_cutu
!= NULL
)
11031 if (dwarf_read_debug
)
11033 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
11034 kind
, dwo_name
, hex_string (signature
),
11035 host_address_to_string (dwo_cutu
));
11042 /* We didn't find it. This could mean a dwo_id mismatch, or
11043 someone deleted the DWO/DWP file, or the search path isn't set up
11044 correctly to find the file. */
11046 if (dwarf_read_debug
)
11048 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
11049 kind
, dwo_name
, hex_string (signature
));
11052 /* This is a warning and not a complaint because it can be caused by
11053 pilot error (e.g., user accidentally deleting the DWO). */
11055 /* Print the name of the DWP file if we looked there, helps the user
11056 better diagnose the problem. */
11057 char *dwp_text
= NULL
;
11058 struct cleanup
*cleanups
;
11060 if (dwp_file
!= NULL
)
11061 dwp_text
= xstrprintf (" [in DWP file %s]", lbasename (dwp_file
->name
));
11062 cleanups
= make_cleanup (xfree
, dwp_text
);
11064 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x"
11065 " [in module %s]"),
11066 kind
, dwo_name
, hex_string (signature
),
11067 dwp_text
!= NULL
? dwp_text
: "",
11068 this_unit
->is_debug_types
? "TU" : "CU",
11069 this_unit
->offset
.sect_off
, objfile_name (objfile
));
11071 do_cleanups (cleanups
);
11076 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
11077 See lookup_dwo_cutu_unit for details. */
11079 static struct dwo_unit
*
11080 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
11081 const char *dwo_name
, const char *comp_dir
,
11082 ULONGEST signature
)
11084 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
11087 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
11088 See lookup_dwo_cutu_unit for details. */
11090 static struct dwo_unit
*
11091 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
11092 const char *dwo_name
, const char *comp_dir
)
11094 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
11097 /* Traversal function for queue_and_load_all_dwo_tus. */
11100 queue_and_load_dwo_tu (void **slot
, void *info
)
11102 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
11103 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
11104 ULONGEST signature
= dwo_unit
->signature
;
11105 struct signatured_type
*sig_type
=
11106 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
11108 if (sig_type
!= NULL
)
11110 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
11112 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
11113 a real dependency of PER_CU on SIG_TYPE. That is detected later
11114 while processing PER_CU. */
11115 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
11116 load_full_type_unit (sig_cu
);
11117 VEC_safe_push (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, sig_cu
);
11123 /* Queue all TUs contained in the DWO of PER_CU to be read in.
11124 The DWO may have the only definition of the type, though it may not be
11125 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
11126 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
11129 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
11131 struct dwo_unit
*dwo_unit
;
11132 struct dwo_file
*dwo_file
;
11134 gdb_assert (!per_cu
->is_debug_types
);
11135 gdb_assert (get_dwp_file () == NULL
);
11136 gdb_assert (per_cu
->cu
!= NULL
);
11138 dwo_unit
= per_cu
->cu
->dwo_unit
;
11139 gdb_assert (dwo_unit
!= NULL
);
11141 dwo_file
= dwo_unit
->dwo_file
;
11142 if (dwo_file
->tus
!= NULL
)
11143 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
11146 /* Free all resources associated with DWO_FILE.
11147 Close the DWO file and munmap the sections.
11148 All memory should be on the objfile obstack. */
11151 free_dwo_file (struct dwo_file
*dwo_file
, struct objfile
*objfile
)
11154 /* Note: dbfd is NULL for virtual DWO files. */
11155 gdb_bfd_unref (dwo_file
->dbfd
);
11157 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
11160 /* Wrapper for free_dwo_file for use in cleanups. */
11163 free_dwo_file_cleanup (void *arg
)
11165 struct dwo_file
*dwo_file
= (struct dwo_file
*) arg
;
11166 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11168 free_dwo_file (dwo_file
, objfile
);
11171 /* Traversal function for free_dwo_files. */
11174 free_dwo_file_from_slot (void **slot
, void *info
)
11176 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
11177 struct objfile
*objfile
= (struct objfile
*) info
;
11179 free_dwo_file (dwo_file
, objfile
);
11184 /* Free all resources associated with DWO_FILES. */
11187 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
11189 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
11192 /* Read in various DIEs. */
11194 /* qsort helper for inherit_abstract_dies. */
11197 unsigned_int_compar (const void *ap
, const void *bp
)
11199 unsigned int a
= *(unsigned int *) ap
;
11200 unsigned int b
= *(unsigned int *) bp
;
11202 return (a
> b
) - (b
> a
);
11205 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
11206 Inherit only the children of the DW_AT_abstract_origin DIE not being
11207 already referenced by DW_AT_abstract_origin from the children of the
11211 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
11213 struct die_info
*child_die
;
11214 unsigned die_children_count
;
11215 /* CU offsets which were referenced by children of the current DIE. */
11216 sect_offset
*offsets
;
11217 sect_offset
*offsets_end
, *offsetp
;
11218 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
11219 struct die_info
*origin_die
;
11220 /* Iterator of the ORIGIN_DIE children. */
11221 struct die_info
*origin_child_die
;
11222 struct cleanup
*cleanups
;
11223 struct attribute
*attr
;
11224 struct dwarf2_cu
*origin_cu
;
11225 struct pending
**origin_previous_list_in_scope
;
11227 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
11231 /* Note that following die references may follow to a die in a
11235 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
11237 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
11239 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
11240 origin_cu
->list_in_scope
= cu
->list_in_scope
;
11242 if (die
->tag
!= origin_die
->tag
11243 && !(die
->tag
== DW_TAG_inlined_subroutine
11244 && origin_die
->tag
== DW_TAG_subprogram
))
11245 complaint (&symfile_complaints
,
11246 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
11247 die
->offset
.sect_off
, origin_die
->offset
.sect_off
);
11249 child_die
= die
->child
;
11250 die_children_count
= 0;
11251 while (child_die
&& child_die
->tag
)
11253 child_die
= sibling_die (child_die
);
11254 die_children_count
++;
11256 offsets
= XNEWVEC (sect_offset
, die_children_count
);
11257 cleanups
= make_cleanup (xfree
, offsets
);
11259 offsets_end
= offsets
;
11260 for (child_die
= die
->child
;
11261 child_die
&& child_die
->tag
;
11262 child_die
= sibling_die (child_die
))
11264 struct die_info
*child_origin_die
;
11265 struct dwarf2_cu
*child_origin_cu
;
11267 /* We are trying to process concrete instance entries:
11268 DW_TAG_GNU_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
11269 it's not relevant to our analysis here. i.e. detecting DIEs that are
11270 present in the abstract instance but not referenced in the concrete
11272 if (child_die
->tag
== DW_TAG_GNU_call_site
)
11275 /* For each CHILD_DIE, find the corresponding child of
11276 ORIGIN_DIE. If there is more than one layer of
11277 DW_AT_abstract_origin, follow them all; there shouldn't be,
11278 but GCC versions at least through 4.4 generate this (GCC PR
11280 child_origin_die
= child_die
;
11281 child_origin_cu
= cu
;
11284 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
11288 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
11292 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
11293 counterpart may exist. */
11294 if (child_origin_die
!= child_die
)
11296 if (child_die
->tag
!= child_origin_die
->tag
11297 && !(child_die
->tag
== DW_TAG_inlined_subroutine
11298 && child_origin_die
->tag
== DW_TAG_subprogram
))
11299 complaint (&symfile_complaints
,
11300 _("Child DIE 0x%x and its abstract origin 0x%x have "
11301 "different tags"), child_die
->offset
.sect_off
,
11302 child_origin_die
->offset
.sect_off
);
11303 if (child_origin_die
->parent
!= origin_die
)
11304 complaint (&symfile_complaints
,
11305 _("Child DIE 0x%x and its abstract origin 0x%x have "
11306 "different parents"), child_die
->offset
.sect_off
,
11307 child_origin_die
->offset
.sect_off
);
11309 *offsets_end
++ = child_origin_die
->offset
;
11312 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
11313 unsigned_int_compar
);
11314 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
11315 if (offsetp
[-1].sect_off
== offsetp
->sect_off
)
11316 complaint (&symfile_complaints
,
11317 _("Multiple children of DIE 0x%x refer "
11318 "to DIE 0x%x as their abstract origin"),
11319 die
->offset
.sect_off
, offsetp
->sect_off
);
11322 origin_child_die
= origin_die
->child
;
11323 while (origin_child_die
&& origin_child_die
->tag
)
11325 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
11326 while (offsetp
< offsets_end
11327 && offsetp
->sect_off
< origin_child_die
->offset
.sect_off
)
11329 if (offsetp
>= offsets_end
11330 || offsetp
->sect_off
> origin_child_die
->offset
.sect_off
)
11332 /* Found that ORIGIN_CHILD_DIE is really not referenced.
11333 Check whether we're already processing ORIGIN_CHILD_DIE.
11334 This can happen with mutually referenced abstract_origins.
11336 if (!origin_child_die
->in_process
)
11337 process_die (origin_child_die
, origin_cu
);
11339 origin_child_die
= sibling_die (origin_child_die
);
11341 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
11343 do_cleanups (cleanups
);
11347 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11349 struct objfile
*objfile
= cu
->objfile
;
11350 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11351 struct context_stack
*newobj
;
11354 struct die_info
*child_die
;
11355 struct attribute
*attr
, *call_line
, *call_file
;
11357 CORE_ADDR baseaddr
;
11358 struct block
*block
;
11359 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
11360 VEC (symbolp
) *template_args
= NULL
;
11361 struct template_symbol
*templ_func
= NULL
;
11365 /* If we do not have call site information, we can't show the
11366 caller of this inlined function. That's too confusing, so
11367 only use the scope for local variables. */
11368 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
11369 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
11370 if (call_line
== NULL
|| call_file
== NULL
)
11372 read_lexical_block_scope (die
, cu
);
11377 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11379 name
= dwarf2_name (die
, cu
);
11381 /* Ignore functions with missing or empty names. These are actually
11382 illegal according to the DWARF standard. */
11385 complaint (&symfile_complaints
,
11386 _("missing name for subprogram DIE at %d"),
11387 die
->offset
.sect_off
);
11391 /* Ignore functions with missing or invalid low and high pc attributes. */
11392 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
11393 == PC_BOUNDS_NOT_PRESENT
)
11395 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
11396 if (!attr
|| !DW_UNSND (attr
))
11397 complaint (&symfile_complaints
,
11398 _("cannot get low and high bounds "
11399 "for subprogram DIE at %d"),
11400 die
->offset
.sect_off
);
11404 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11405 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
11407 /* If we have any template arguments, then we must allocate a
11408 different sort of symbol. */
11409 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
11411 if (child_die
->tag
== DW_TAG_template_type_param
11412 || child_die
->tag
== DW_TAG_template_value_param
)
11414 templ_func
= allocate_template_symbol (objfile
);
11415 templ_func
->base
.is_cplus_template_function
= 1;
11420 newobj
= push_context (0, lowpc
);
11421 newobj
->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
11422 (struct symbol
*) templ_func
);
11424 /* If there is a location expression for DW_AT_frame_base, record
11426 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
11428 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
11430 /* If there is a location for the static link, record it. */
11431 newobj
->static_link
= NULL
;
11432 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
11435 newobj
->static_link
11436 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
11437 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
);
11440 cu
->list_in_scope
= &local_symbols
;
11442 if (die
->child
!= NULL
)
11444 child_die
= die
->child
;
11445 while (child_die
&& child_die
->tag
)
11447 if (child_die
->tag
== DW_TAG_template_type_param
11448 || child_die
->tag
== DW_TAG_template_value_param
)
11450 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
11453 VEC_safe_push (symbolp
, template_args
, arg
);
11456 process_die (child_die
, cu
);
11457 child_die
= sibling_die (child_die
);
11461 inherit_abstract_dies (die
, cu
);
11463 /* If we have a DW_AT_specification, we might need to import using
11464 directives from the context of the specification DIE. See the
11465 comment in determine_prefix. */
11466 if (cu
->language
== language_cplus
11467 && dwarf2_attr (die
, DW_AT_specification
, cu
))
11469 struct dwarf2_cu
*spec_cu
= cu
;
11470 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
11474 child_die
= spec_die
->child
;
11475 while (child_die
&& child_die
->tag
)
11477 if (child_die
->tag
== DW_TAG_imported_module
)
11478 process_die (child_die
, spec_cu
);
11479 child_die
= sibling_die (child_die
);
11482 /* In some cases, GCC generates specification DIEs that
11483 themselves contain DW_AT_specification attributes. */
11484 spec_die
= die_specification (spec_die
, &spec_cu
);
11488 newobj
= pop_context ();
11489 /* Make a block for the local symbols within. */
11490 block
= finish_block (newobj
->name
, &local_symbols
, newobj
->old_blocks
,
11491 newobj
->static_link
, lowpc
, highpc
);
11493 /* For C++, set the block's scope. */
11494 if ((cu
->language
== language_cplus
11495 || cu
->language
== language_fortran
11496 || cu
->language
== language_d
11497 || cu
->language
== language_rust
)
11498 && cu
->processing_has_namespace_info
)
11499 block_set_scope (block
, determine_prefix (die
, cu
),
11500 &objfile
->objfile_obstack
);
11502 /* If we have address ranges, record them. */
11503 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11505 gdbarch_make_symbol_special (gdbarch
, newobj
->name
, objfile
);
11507 /* Attach template arguments to function. */
11508 if (! VEC_empty (symbolp
, template_args
))
11510 gdb_assert (templ_func
!= NULL
);
11512 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
11513 templ_func
->template_arguments
11514 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
11515 templ_func
->n_template_arguments
);
11516 memcpy (templ_func
->template_arguments
,
11517 VEC_address (symbolp
, template_args
),
11518 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
11519 VEC_free (symbolp
, template_args
);
11522 /* In C++, we can have functions nested inside functions (e.g., when
11523 a function declares a class that has methods). This means that
11524 when we finish processing a function scope, we may need to go
11525 back to building a containing block's symbol lists. */
11526 local_symbols
= newobj
->locals
;
11527 local_using_directives
= newobj
->local_using_directives
;
11529 /* If we've finished processing a top-level function, subsequent
11530 symbols go in the file symbol list. */
11531 if (outermost_context_p ())
11532 cu
->list_in_scope
= &file_symbols
;
11535 /* Process all the DIES contained within a lexical block scope. Start
11536 a new scope, process the dies, and then close the scope. */
11539 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11541 struct objfile
*objfile
= cu
->objfile
;
11542 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11543 struct context_stack
*newobj
;
11544 CORE_ADDR lowpc
, highpc
;
11545 struct die_info
*child_die
;
11546 CORE_ADDR baseaddr
;
11548 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11550 /* Ignore blocks with missing or invalid low and high pc attributes. */
11551 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
11552 as multiple lexical blocks? Handling children in a sane way would
11553 be nasty. Might be easier to properly extend generic blocks to
11554 describe ranges. */
11555 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
11556 == PC_BOUNDS_NOT_PRESENT
)
11558 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11559 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
11561 push_context (0, lowpc
);
11562 if (die
->child
!= NULL
)
11564 child_die
= die
->child
;
11565 while (child_die
&& child_die
->tag
)
11567 process_die (child_die
, cu
);
11568 child_die
= sibling_die (child_die
);
11571 inherit_abstract_dies (die
, cu
);
11572 newobj
= pop_context ();
11574 if (local_symbols
!= NULL
|| local_using_directives
!= NULL
)
11576 struct block
*block
11577 = finish_block (0, &local_symbols
, newobj
->old_blocks
, NULL
,
11578 newobj
->start_addr
, highpc
);
11580 /* Note that recording ranges after traversing children, as we
11581 do here, means that recording a parent's ranges entails
11582 walking across all its children's ranges as they appear in
11583 the address map, which is quadratic behavior.
11585 It would be nicer to record the parent's ranges before
11586 traversing its children, simply overriding whatever you find
11587 there. But since we don't even decide whether to create a
11588 block until after we've traversed its children, that's hard
11590 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11592 local_symbols
= newobj
->locals
;
11593 local_using_directives
= newobj
->local_using_directives
;
11596 /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */
11599 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11601 struct objfile
*objfile
= cu
->objfile
;
11602 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11603 CORE_ADDR pc
, baseaddr
;
11604 struct attribute
*attr
;
11605 struct call_site
*call_site
, call_site_local
;
11608 struct die_info
*child_die
;
11610 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11612 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
11615 complaint (&symfile_complaints
,
11616 _("missing DW_AT_low_pc for DW_TAG_GNU_call_site "
11617 "DIE 0x%x [in module %s]"),
11618 die
->offset
.sect_off
, objfile_name (objfile
));
11621 pc
= attr_value_as_address (attr
) + baseaddr
;
11622 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
11624 if (cu
->call_site_htab
== NULL
)
11625 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
11626 NULL
, &objfile
->objfile_obstack
,
11627 hashtab_obstack_allocate
, NULL
);
11628 call_site_local
.pc
= pc
;
11629 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
11632 complaint (&symfile_complaints
,
11633 _("Duplicate PC %s for DW_TAG_GNU_call_site "
11634 "DIE 0x%x [in module %s]"),
11635 paddress (gdbarch
, pc
), die
->offset
.sect_off
,
11636 objfile_name (objfile
));
11640 /* Count parameters at the caller. */
11643 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
11644 child_die
= sibling_die (child_die
))
11646 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11648 complaint (&symfile_complaints
,
11649 _("Tag %d is not DW_TAG_GNU_call_site_parameter in "
11650 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11651 child_die
->tag
, child_die
->offset
.sect_off
,
11652 objfile_name (objfile
));
11660 = ((struct call_site
*)
11661 obstack_alloc (&objfile
->objfile_obstack
,
11662 sizeof (*call_site
)
11663 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
11665 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
11666 call_site
->pc
= pc
;
11668 if (dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
11670 struct die_info
*func_die
;
11672 /* Skip also over DW_TAG_inlined_subroutine. */
11673 for (func_die
= die
->parent
;
11674 func_die
&& func_die
->tag
!= DW_TAG_subprogram
11675 && func_die
->tag
!= DW_TAG_subroutine_type
;
11676 func_die
= func_die
->parent
);
11678 /* DW_AT_GNU_all_call_sites is a superset
11679 of DW_AT_GNU_all_tail_call_sites. */
11681 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
11682 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
11684 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
11685 not complete. But keep CALL_SITE for look ups via call_site_htab,
11686 both the initial caller containing the real return address PC and
11687 the final callee containing the current PC of a chain of tail
11688 calls do not need to have the tail call list complete. But any
11689 function candidate for a virtual tail call frame searched via
11690 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
11691 determined unambiguously. */
11695 struct type
*func_type
= NULL
;
11698 func_type
= get_die_type (func_die
, cu
);
11699 if (func_type
!= NULL
)
11701 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
11703 /* Enlist this call site to the function. */
11704 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
11705 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
11708 complaint (&symfile_complaints
,
11709 _("Cannot find function owning DW_TAG_GNU_call_site "
11710 "DIE 0x%x [in module %s]"),
11711 die
->offset
.sect_off
, objfile_name (objfile
));
11715 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
11717 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
11718 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
11719 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
11720 /* Keep NULL DWARF_BLOCK. */;
11721 else if (attr_form_is_block (attr
))
11723 struct dwarf2_locexpr_baton
*dlbaton
;
11725 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
11726 dlbaton
->data
= DW_BLOCK (attr
)->data
;
11727 dlbaton
->size
= DW_BLOCK (attr
)->size
;
11728 dlbaton
->per_cu
= cu
->per_cu
;
11730 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
11732 else if (attr_form_is_ref (attr
))
11734 struct dwarf2_cu
*target_cu
= cu
;
11735 struct die_info
*target_die
;
11737 target_die
= follow_die_ref (die
, attr
, &target_cu
);
11738 gdb_assert (target_cu
->objfile
== objfile
);
11739 if (die_is_declaration (target_die
, target_cu
))
11741 const char *target_physname
;
11743 /* Prefer the mangled name; otherwise compute the demangled one. */
11744 target_physname
= dwarf2_string_attr (target_die
,
11745 DW_AT_linkage_name
,
11747 if (target_physname
== NULL
)
11748 target_physname
= dwarf2_string_attr (target_die
,
11749 DW_AT_MIPS_linkage_name
,
11751 if (target_physname
== NULL
)
11752 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
11753 if (target_physname
== NULL
)
11754 complaint (&symfile_complaints
,
11755 _("DW_AT_GNU_call_site_target target DIE has invalid "
11756 "physname, for referencing DIE 0x%x [in module %s]"),
11757 die
->offset
.sect_off
, objfile_name (objfile
));
11759 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
11765 /* DW_AT_entry_pc should be preferred. */
11766 if (dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
)
11767 == PC_BOUNDS_NOT_PRESENT
)
11768 complaint (&symfile_complaints
,
11769 _("DW_AT_GNU_call_site_target target DIE has invalid "
11770 "low pc, for referencing DIE 0x%x [in module %s]"),
11771 die
->offset
.sect_off
, objfile_name (objfile
));
11774 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11775 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
11780 complaint (&symfile_complaints
,
11781 _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither "
11782 "block nor reference, for DIE 0x%x [in module %s]"),
11783 die
->offset
.sect_off
, objfile_name (objfile
));
11785 call_site
->per_cu
= cu
->per_cu
;
11787 for (child_die
= die
->child
;
11788 child_die
&& child_die
->tag
;
11789 child_die
= sibling_die (child_die
))
11791 struct call_site_parameter
*parameter
;
11792 struct attribute
*loc
, *origin
;
11794 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11796 /* Already printed the complaint above. */
11800 gdb_assert (call_site
->parameter_count
< nparams
);
11801 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
11803 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
11804 specifies DW_TAG_formal_parameter. Value of the data assumed for the
11805 register is contained in DW_AT_GNU_call_site_value. */
11807 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
11808 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
11809 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
11811 sect_offset offset
;
11813 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
11814 offset
= dwarf2_get_ref_die_offset (origin
);
11815 if (!offset_in_cu_p (&cu
->header
, offset
))
11817 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
11818 binding can be done only inside one CU. Such referenced DIE
11819 therefore cannot be even moved to DW_TAG_partial_unit. */
11820 complaint (&symfile_complaints
,
11821 _("DW_AT_abstract_origin offset is not in CU for "
11822 "DW_TAG_GNU_call_site child DIE 0x%x "
11824 child_die
->offset
.sect_off
, objfile_name (objfile
));
11827 parameter
->u
.param_offset
.cu_off
= (offset
.sect_off
11828 - cu
->header
.offset
.sect_off
);
11830 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
11832 complaint (&symfile_complaints
,
11833 _("No DW_FORM_block* DW_AT_location for "
11834 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11835 child_die
->offset
.sect_off
, objfile_name (objfile
));
11840 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
11841 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
11842 if (parameter
->u
.dwarf_reg
!= -1)
11843 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
11844 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
11845 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
11846 ¶meter
->u
.fb_offset
))
11847 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
11850 complaint (&symfile_complaints
,
11851 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
11852 "for DW_FORM_block* DW_AT_location is supported for "
11853 "DW_TAG_GNU_call_site child DIE 0x%x "
11855 child_die
->offset
.sect_off
, objfile_name (objfile
));
11860 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
11861 if (!attr_form_is_block (attr
))
11863 complaint (&symfile_complaints
,
11864 _("No DW_FORM_block* DW_AT_GNU_call_site_value for "
11865 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11866 child_die
->offset
.sect_off
, objfile_name (objfile
));
11869 parameter
->value
= DW_BLOCK (attr
)->data
;
11870 parameter
->value_size
= DW_BLOCK (attr
)->size
;
11872 /* Parameters are not pre-cleared by memset above. */
11873 parameter
->data_value
= NULL
;
11874 parameter
->data_value_size
= 0;
11875 call_site
->parameter_count
++;
11877 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
11880 if (!attr_form_is_block (attr
))
11881 complaint (&symfile_complaints
,
11882 _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for "
11883 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11884 child_die
->offset
.sect_off
, objfile_name (objfile
));
11887 parameter
->data_value
= DW_BLOCK (attr
)->data
;
11888 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
11894 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
11895 Return 1 if the attributes are present and valid, otherwise, return 0.
11896 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
11899 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
11900 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
11901 struct partial_symtab
*ranges_pst
)
11903 struct objfile
*objfile
= cu
->objfile
;
11904 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11905 struct comp_unit_head
*cu_header
= &cu
->header
;
11906 bfd
*obfd
= objfile
->obfd
;
11907 unsigned int addr_size
= cu_header
->addr_size
;
11908 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
11909 /* Base address selection entry. */
11912 unsigned int dummy
;
11913 const gdb_byte
*buffer
;
11916 CORE_ADDR high
= 0;
11917 CORE_ADDR baseaddr
;
11919 found_base
= cu
->base_known
;
11920 base
= cu
->base_address
;
11922 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
11923 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
11925 complaint (&symfile_complaints
,
11926 _("Offset %d out of bounds for DW_AT_ranges attribute"),
11930 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
11934 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11938 CORE_ADDR range_beginning
, range_end
;
11940 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
11941 buffer
+= addr_size
;
11942 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
11943 buffer
+= addr_size
;
11944 offset
+= 2 * addr_size
;
11946 /* An end of list marker is a pair of zero addresses. */
11947 if (range_beginning
== 0 && range_end
== 0)
11948 /* Found the end of list entry. */
11951 /* Each base address selection entry is a pair of 2 values.
11952 The first is the largest possible address, the second is
11953 the base address. Check for a base address here. */
11954 if ((range_beginning
& mask
) == mask
)
11956 /* If we found the largest possible address, then we already
11957 have the base address in range_end. */
11965 /* We have no valid base address for the ranges
11967 complaint (&symfile_complaints
,
11968 _("Invalid .debug_ranges data (no base address)"));
11972 if (range_beginning
> range_end
)
11974 /* Inverted range entries are invalid. */
11975 complaint (&symfile_complaints
,
11976 _("Invalid .debug_ranges data (inverted range)"));
11980 /* Empty range entries have no effect. */
11981 if (range_beginning
== range_end
)
11984 range_beginning
+= base
;
11987 /* A not-uncommon case of bad debug info.
11988 Don't pollute the addrmap with bad data. */
11989 if (range_beginning
+ baseaddr
== 0
11990 && !dwarf2_per_objfile
->has_section_at_zero
)
11992 complaint (&symfile_complaints
,
11993 _(".debug_ranges entry has start address of zero"
11994 " [in module %s]"), objfile_name (objfile
));
11998 if (ranges_pst
!= NULL
)
12003 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
12004 range_beginning
+ baseaddr
);
12005 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
12006 range_end
+ baseaddr
);
12007 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
12011 /* FIXME: This is recording everything as a low-high
12012 segment of consecutive addresses. We should have a
12013 data structure for discontiguous block ranges
12017 low
= range_beginning
;
12023 if (range_beginning
< low
)
12024 low
= range_beginning
;
12025 if (range_end
> high
)
12031 /* If the first entry is an end-of-list marker, the range
12032 describes an empty scope, i.e. no instructions. */
12038 *high_return
= high
;
12042 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
12043 definition for the return value. *LOWPC and *HIGHPC are set iff
12044 PC_BOUNDS_NOT_PRESENT is not returned. */
12046 static enum pc_bounds_kind
12047 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
12048 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
12049 struct partial_symtab
*pst
)
12051 struct attribute
*attr
;
12052 struct attribute
*attr_high
;
12054 CORE_ADDR high
= 0;
12055 enum pc_bounds_kind ret
= PC_BOUNDS_NOT_PRESENT
;
12057 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
12060 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
12063 low
= attr_value_as_address (attr
);
12064 high
= attr_value_as_address (attr_high
);
12065 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
12069 /* Found high w/o low attribute. */
12070 return PC_BOUNDS_NOT_PRESENT
;
12072 /* Found consecutive range of addresses. */
12073 ret
= PC_BOUNDS_HIGH_LOW
;
12077 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
12080 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
12081 We take advantage of the fact that DW_AT_ranges does not appear
12082 in DW_TAG_compile_unit of DWO files. */
12083 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
12084 unsigned int ranges_offset
= (DW_UNSND (attr
)
12085 + (need_ranges_base
12089 /* Value of the DW_AT_ranges attribute is the offset in the
12090 .debug_ranges section. */
12091 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
12092 return PC_BOUNDS_NOT_PRESENT
;
12093 /* Found discontinuous range of addresses. */
12094 ret
= PC_BOUNDS_RANGES
;
12098 /* read_partial_die has also the strict LOW < HIGH requirement. */
12100 return PC_BOUNDS_NOT_PRESENT
;
12102 /* When using the GNU linker, .gnu.linkonce. sections are used to
12103 eliminate duplicate copies of functions and vtables and such.
12104 The linker will arbitrarily choose one and discard the others.
12105 The AT_*_pc values for such functions refer to local labels in
12106 these sections. If the section from that file was discarded, the
12107 labels are not in the output, so the relocs get a value of 0.
12108 If this is a discarded function, mark the pc bounds as invalid,
12109 so that GDB will ignore it. */
12110 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12111 return PC_BOUNDS_NOT_PRESENT
;
12119 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
12120 its low and high PC addresses. Do nothing if these addresses could not
12121 be determined. Otherwise, set LOWPC to the low address if it is smaller,
12122 and HIGHPC to the high address if greater than HIGHPC. */
12125 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
12126 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
12127 struct dwarf2_cu
*cu
)
12129 CORE_ADDR low
, high
;
12130 struct die_info
*child
= die
->child
;
12132 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
)
12133 != PC_BOUNDS_NOT_PRESENT
)
12135 *lowpc
= min (*lowpc
, low
);
12136 *highpc
= max (*highpc
, high
);
12139 /* If the language does not allow nested subprograms (either inside
12140 subprograms or lexical blocks), we're done. */
12141 if (cu
->language
!= language_ada
)
12144 /* Check all the children of the given DIE. If it contains nested
12145 subprograms, then check their pc bounds. Likewise, we need to
12146 check lexical blocks as well, as they may also contain subprogram
12148 while (child
&& child
->tag
)
12150 if (child
->tag
== DW_TAG_subprogram
12151 || child
->tag
== DW_TAG_lexical_block
)
12152 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
12153 child
= sibling_die (child
);
12157 /* Get the low and high pc's represented by the scope DIE, and store
12158 them in *LOWPC and *HIGHPC. If the correct values can't be
12159 determined, set *LOWPC to -1 and *HIGHPC to 0. */
12162 get_scope_pc_bounds (struct die_info
*die
,
12163 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
12164 struct dwarf2_cu
*cu
)
12166 CORE_ADDR best_low
= (CORE_ADDR
) -1;
12167 CORE_ADDR best_high
= (CORE_ADDR
) 0;
12168 CORE_ADDR current_low
, current_high
;
12170 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
12171 != PC_BOUNDS_NOT_PRESENT
)
12173 best_low
= current_low
;
12174 best_high
= current_high
;
12178 struct die_info
*child
= die
->child
;
12180 while (child
&& child
->tag
)
12182 switch (child
->tag
) {
12183 case DW_TAG_subprogram
:
12184 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
12186 case DW_TAG_namespace
:
12187 case DW_TAG_module
:
12188 /* FIXME: carlton/2004-01-16: Should we do this for
12189 DW_TAG_class_type/DW_TAG_structure_type, too? I think
12190 that current GCC's always emit the DIEs corresponding
12191 to definitions of methods of classes as children of a
12192 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
12193 the DIEs giving the declarations, which could be
12194 anywhere). But I don't see any reason why the
12195 standards says that they have to be there. */
12196 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
12198 if (current_low
!= ((CORE_ADDR
) -1))
12200 best_low
= min (best_low
, current_low
);
12201 best_high
= max (best_high
, current_high
);
12209 child
= sibling_die (child
);
12214 *highpc
= best_high
;
12217 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
12221 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
12222 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
12224 struct objfile
*objfile
= cu
->objfile
;
12225 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12226 struct attribute
*attr
;
12227 struct attribute
*attr_high
;
12229 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
12232 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
12235 CORE_ADDR low
= attr_value_as_address (attr
);
12236 CORE_ADDR high
= attr_value_as_address (attr_high
);
12238 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
12241 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
12242 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
12243 record_block_range (block
, low
, high
- 1);
12247 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
12250 bfd
*obfd
= objfile
->obfd
;
12251 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
12252 We take advantage of the fact that DW_AT_ranges does not appear
12253 in DW_TAG_compile_unit of DWO files. */
12254 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
12256 /* The value of the DW_AT_ranges attribute is the offset of the
12257 address range list in the .debug_ranges section. */
12258 unsigned long offset
= (DW_UNSND (attr
)
12259 + (need_ranges_base
? cu
->ranges_base
: 0));
12260 const gdb_byte
*buffer
;
12262 /* For some target architectures, but not others, the
12263 read_address function sign-extends the addresses it returns.
12264 To recognize base address selection entries, we need a
12266 unsigned int addr_size
= cu
->header
.addr_size
;
12267 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
12269 /* The base address, to which the next pair is relative. Note
12270 that this 'base' is a DWARF concept: most entries in a range
12271 list are relative, to reduce the number of relocs against the
12272 debugging information. This is separate from this function's
12273 'baseaddr' argument, which GDB uses to relocate debugging
12274 information from a shared library based on the address at
12275 which the library was loaded. */
12276 CORE_ADDR base
= cu
->base_address
;
12277 int base_known
= cu
->base_known
;
12279 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
12280 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
12282 complaint (&symfile_complaints
,
12283 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
12287 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
12291 unsigned int bytes_read
;
12292 CORE_ADDR start
, end
;
12294 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12295 buffer
+= bytes_read
;
12296 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12297 buffer
+= bytes_read
;
12299 /* Did we find the end of the range list? */
12300 if (start
== 0 && end
== 0)
12303 /* Did we find a base address selection entry? */
12304 else if ((start
& base_select_mask
) == base_select_mask
)
12310 /* We found an ordinary address range. */
12315 complaint (&symfile_complaints
,
12316 _("Invalid .debug_ranges data "
12317 "(no base address)"));
12323 /* Inverted range entries are invalid. */
12324 complaint (&symfile_complaints
,
12325 _("Invalid .debug_ranges data "
12326 "(inverted range)"));
12330 /* Empty range entries have no effect. */
12334 start
+= base
+ baseaddr
;
12335 end
+= base
+ baseaddr
;
12337 /* A not-uncommon case of bad debug info.
12338 Don't pollute the addrmap with bad data. */
12339 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12341 complaint (&symfile_complaints
,
12342 _(".debug_ranges entry has start address of zero"
12343 " [in module %s]"), objfile_name (objfile
));
12347 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
12348 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
12349 record_block_range (block
, start
, end
- 1);
12355 /* Check whether the producer field indicates either of GCC < 4.6, or the
12356 Intel C/C++ compiler, and cache the result in CU. */
12359 check_producer (struct dwarf2_cu
*cu
)
12363 if (cu
->producer
== NULL
)
12365 /* For unknown compilers expect their behavior is DWARF version
12368 GCC started to support .debug_types sections by -gdwarf-4 since
12369 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
12370 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
12371 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
12372 interpreted incorrectly by GDB now - GCC PR debug/48229. */
12374 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
12376 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
12377 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
12379 else if (startswith (cu
->producer
, "Intel(R) C"))
12380 cu
->producer_is_icc
= 1;
12383 /* For other non-GCC compilers, expect their behavior is DWARF version
12387 cu
->checked_producer
= 1;
12390 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
12391 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
12392 during 4.6.0 experimental. */
12395 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
12397 if (!cu
->checked_producer
)
12398 check_producer (cu
);
12400 return cu
->producer_is_gxx_lt_4_6
;
12403 /* Return the default accessibility type if it is not overriden by
12404 DW_AT_accessibility. */
12406 static enum dwarf_access_attribute
12407 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
12409 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
12411 /* The default DWARF 2 accessibility for members is public, the default
12412 accessibility for inheritance is private. */
12414 if (die
->tag
!= DW_TAG_inheritance
)
12415 return DW_ACCESS_public
;
12417 return DW_ACCESS_private
;
12421 /* DWARF 3+ defines the default accessibility a different way. The same
12422 rules apply now for DW_TAG_inheritance as for the members and it only
12423 depends on the container kind. */
12425 if (die
->parent
->tag
== DW_TAG_class_type
)
12426 return DW_ACCESS_private
;
12428 return DW_ACCESS_public
;
12432 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
12433 offset. If the attribute was not found return 0, otherwise return
12434 1. If it was found but could not properly be handled, set *OFFSET
12438 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
12441 struct attribute
*attr
;
12443 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
12448 /* Note that we do not check for a section offset first here.
12449 This is because DW_AT_data_member_location is new in DWARF 4,
12450 so if we see it, we can assume that a constant form is really
12451 a constant and not a section offset. */
12452 if (attr_form_is_constant (attr
))
12453 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
12454 else if (attr_form_is_section_offset (attr
))
12455 dwarf2_complex_location_expr_complaint ();
12456 else if (attr_form_is_block (attr
))
12457 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12459 dwarf2_complex_location_expr_complaint ();
12467 /* Add an aggregate field to the field list. */
12470 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
12471 struct dwarf2_cu
*cu
)
12473 struct objfile
*objfile
= cu
->objfile
;
12474 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12475 struct nextfield
*new_field
;
12476 struct attribute
*attr
;
12478 const char *fieldname
= "";
12480 /* Allocate a new field list entry and link it in. */
12481 new_field
= XNEW (struct nextfield
);
12482 make_cleanup (xfree
, new_field
);
12483 memset (new_field
, 0, sizeof (struct nextfield
));
12485 if (die
->tag
== DW_TAG_inheritance
)
12487 new_field
->next
= fip
->baseclasses
;
12488 fip
->baseclasses
= new_field
;
12492 new_field
->next
= fip
->fields
;
12493 fip
->fields
= new_field
;
12497 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
12499 new_field
->accessibility
= DW_UNSND (attr
);
12501 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
12502 if (new_field
->accessibility
!= DW_ACCESS_public
)
12503 fip
->non_public_fields
= 1;
12505 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
12507 new_field
->virtuality
= DW_UNSND (attr
);
12509 new_field
->virtuality
= DW_VIRTUALITY_none
;
12511 fp
= &new_field
->field
;
12513 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
12517 /* Data member other than a C++ static data member. */
12519 /* Get type of field. */
12520 fp
->type
= die_type (die
, cu
);
12522 SET_FIELD_BITPOS (*fp
, 0);
12524 /* Get bit size of field (zero if none). */
12525 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
12528 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
12532 FIELD_BITSIZE (*fp
) = 0;
12535 /* Get bit offset of field. */
12536 if (handle_data_member_location (die
, cu
, &offset
))
12537 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
12538 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
12541 if (gdbarch_bits_big_endian (gdbarch
))
12543 /* For big endian bits, the DW_AT_bit_offset gives the
12544 additional bit offset from the MSB of the containing
12545 anonymous object to the MSB of the field. We don't
12546 have to do anything special since we don't need to
12547 know the size of the anonymous object. */
12548 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
12552 /* For little endian bits, compute the bit offset to the
12553 MSB of the anonymous object, subtract off the number of
12554 bits from the MSB of the field to the MSB of the
12555 object, and then subtract off the number of bits of
12556 the field itself. The result is the bit offset of
12557 the LSB of the field. */
12558 int anonymous_size
;
12559 int bit_offset
= DW_UNSND (attr
);
12561 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12564 /* The size of the anonymous object containing
12565 the bit field is explicit, so use the
12566 indicated size (in bytes). */
12567 anonymous_size
= DW_UNSND (attr
);
12571 /* The size of the anonymous object containing
12572 the bit field must be inferred from the type
12573 attribute of the data member containing the
12575 anonymous_size
= TYPE_LENGTH (fp
->type
);
12577 SET_FIELD_BITPOS (*fp
,
12578 (FIELD_BITPOS (*fp
)
12579 + anonymous_size
* bits_per_byte
12580 - bit_offset
- FIELD_BITSIZE (*fp
)));
12584 /* Get name of field. */
12585 fieldname
= dwarf2_name (die
, cu
);
12586 if (fieldname
== NULL
)
12589 /* The name is already allocated along with this objfile, so we don't
12590 need to duplicate it for the type. */
12591 fp
->name
= fieldname
;
12593 /* Change accessibility for artificial fields (e.g. virtual table
12594 pointer or virtual base class pointer) to private. */
12595 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
12597 FIELD_ARTIFICIAL (*fp
) = 1;
12598 new_field
->accessibility
= DW_ACCESS_private
;
12599 fip
->non_public_fields
= 1;
12602 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
12604 /* C++ static member. */
12606 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
12607 is a declaration, but all versions of G++ as of this writing
12608 (so through at least 3.2.1) incorrectly generate
12609 DW_TAG_variable tags. */
12611 const char *physname
;
12613 /* Get name of field. */
12614 fieldname
= dwarf2_name (die
, cu
);
12615 if (fieldname
== NULL
)
12618 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
12620 /* Only create a symbol if this is an external value.
12621 new_symbol checks this and puts the value in the global symbol
12622 table, which we want. If it is not external, new_symbol
12623 will try to put the value in cu->list_in_scope which is wrong. */
12624 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
12626 /* A static const member, not much different than an enum as far as
12627 we're concerned, except that we can support more types. */
12628 new_symbol (die
, NULL
, cu
);
12631 /* Get physical name. */
12632 physname
= dwarf2_physname (fieldname
, die
, cu
);
12634 /* The name is already allocated along with this objfile, so we don't
12635 need to duplicate it for the type. */
12636 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
12637 FIELD_TYPE (*fp
) = die_type (die
, cu
);
12638 FIELD_NAME (*fp
) = fieldname
;
12640 else if (die
->tag
== DW_TAG_inheritance
)
12644 /* C++ base class field. */
12645 if (handle_data_member_location (die
, cu
, &offset
))
12646 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
12647 FIELD_BITSIZE (*fp
) = 0;
12648 FIELD_TYPE (*fp
) = die_type (die
, cu
);
12649 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
12650 fip
->nbaseclasses
++;
12654 /* Add a typedef defined in the scope of the FIP's class. */
12657 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
12658 struct dwarf2_cu
*cu
)
12660 struct typedef_field_list
*new_field
;
12661 struct typedef_field
*fp
;
12663 /* Allocate a new field list entry and link it in. */
12664 new_field
= XCNEW (struct typedef_field_list
);
12665 make_cleanup (xfree
, new_field
);
12667 gdb_assert (die
->tag
== DW_TAG_typedef
);
12669 fp
= &new_field
->field
;
12671 /* Get name of field. */
12672 fp
->name
= dwarf2_name (die
, cu
);
12673 if (fp
->name
== NULL
)
12676 fp
->type
= read_type_die (die
, cu
);
12678 new_field
->next
= fip
->typedef_field_list
;
12679 fip
->typedef_field_list
= new_field
;
12680 fip
->typedef_field_list_count
++;
12683 /* Create the vector of fields, and attach it to the type. */
12686 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
12687 struct dwarf2_cu
*cu
)
12689 int nfields
= fip
->nfields
;
12691 /* Record the field count, allocate space for the array of fields,
12692 and create blank accessibility bitfields if necessary. */
12693 TYPE_NFIELDS (type
) = nfields
;
12694 TYPE_FIELDS (type
) = (struct field
*)
12695 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
12696 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
12698 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
12700 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12702 TYPE_FIELD_PRIVATE_BITS (type
) =
12703 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12704 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
12706 TYPE_FIELD_PROTECTED_BITS (type
) =
12707 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12708 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
12710 TYPE_FIELD_IGNORE_BITS (type
) =
12711 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12712 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
12715 /* If the type has baseclasses, allocate and clear a bit vector for
12716 TYPE_FIELD_VIRTUAL_BITS. */
12717 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
12719 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
12720 unsigned char *pointer
;
12722 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12723 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
12724 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
12725 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
12726 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
12729 /* Copy the saved-up fields into the field vector. Start from the head of
12730 the list, adding to the tail of the field array, so that they end up in
12731 the same order in the array in which they were added to the list. */
12732 while (nfields
-- > 0)
12734 struct nextfield
*fieldp
;
12738 fieldp
= fip
->fields
;
12739 fip
->fields
= fieldp
->next
;
12743 fieldp
= fip
->baseclasses
;
12744 fip
->baseclasses
= fieldp
->next
;
12747 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
12748 switch (fieldp
->accessibility
)
12750 case DW_ACCESS_private
:
12751 if (cu
->language
!= language_ada
)
12752 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
12755 case DW_ACCESS_protected
:
12756 if (cu
->language
!= language_ada
)
12757 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
12760 case DW_ACCESS_public
:
12764 /* Unknown accessibility. Complain and treat it as public. */
12766 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
12767 fieldp
->accessibility
);
12771 if (nfields
< fip
->nbaseclasses
)
12773 switch (fieldp
->virtuality
)
12775 case DW_VIRTUALITY_virtual
:
12776 case DW_VIRTUALITY_pure_virtual
:
12777 if (cu
->language
== language_ada
)
12778 error (_("unexpected virtuality in component of Ada type"));
12779 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
12786 /* Return true if this member function is a constructor, false
12790 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
12792 const char *fieldname
;
12793 const char *type_name
;
12796 if (die
->parent
== NULL
)
12799 if (die
->parent
->tag
!= DW_TAG_structure_type
12800 && die
->parent
->tag
!= DW_TAG_union_type
12801 && die
->parent
->tag
!= DW_TAG_class_type
)
12804 fieldname
= dwarf2_name (die
, cu
);
12805 type_name
= dwarf2_name (die
->parent
, cu
);
12806 if (fieldname
== NULL
|| type_name
== NULL
)
12809 len
= strlen (fieldname
);
12810 return (strncmp (fieldname
, type_name
, len
) == 0
12811 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
12814 /* Add a member function to the proper fieldlist. */
12817 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
12818 struct type
*type
, struct dwarf2_cu
*cu
)
12820 struct objfile
*objfile
= cu
->objfile
;
12821 struct attribute
*attr
;
12822 struct fnfieldlist
*flp
;
12824 struct fn_field
*fnp
;
12825 const char *fieldname
;
12826 struct nextfnfield
*new_fnfield
;
12827 struct type
*this_type
;
12828 enum dwarf_access_attribute accessibility
;
12830 if (cu
->language
== language_ada
)
12831 error (_("unexpected member function in Ada type"));
12833 /* Get name of member function. */
12834 fieldname
= dwarf2_name (die
, cu
);
12835 if (fieldname
== NULL
)
12838 /* Look up member function name in fieldlist. */
12839 for (i
= 0; i
< fip
->nfnfields
; i
++)
12841 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
12845 /* Create new list element if necessary. */
12846 if (i
< fip
->nfnfields
)
12847 flp
= &fip
->fnfieldlists
[i
];
12850 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
12852 fip
->fnfieldlists
= (struct fnfieldlist
*)
12853 xrealloc (fip
->fnfieldlists
,
12854 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
12855 * sizeof (struct fnfieldlist
));
12856 if (fip
->nfnfields
== 0)
12857 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
12859 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
12860 flp
->name
= fieldname
;
12863 i
= fip
->nfnfields
++;
12866 /* Create a new member function field and chain it to the field list
12868 new_fnfield
= XNEW (struct nextfnfield
);
12869 make_cleanup (xfree
, new_fnfield
);
12870 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
12871 new_fnfield
->next
= flp
->head
;
12872 flp
->head
= new_fnfield
;
12875 /* Fill in the member function field info. */
12876 fnp
= &new_fnfield
->fnfield
;
12878 /* Delay processing of the physname until later. */
12879 if (cu
->language
== language_cplus
|| cu
->language
== language_java
)
12881 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
12886 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
12887 fnp
->physname
= physname
? physname
: "";
12890 fnp
->type
= alloc_type (objfile
);
12891 this_type
= read_type_die (die
, cu
);
12892 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
12894 int nparams
= TYPE_NFIELDS (this_type
);
12896 /* TYPE is the domain of this method, and THIS_TYPE is the type
12897 of the method itself (TYPE_CODE_METHOD). */
12898 smash_to_method_type (fnp
->type
, type
,
12899 TYPE_TARGET_TYPE (this_type
),
12900 TYPE_FIELDS (this_type
),
12901 TYPE_NFIELDS (this_type
),
12902 TYPE_VARARGS (this_type
));
12904 /* Handle static member functions.
12905 Dwarf2 has no clean way to discern C++ static and non-static
12906 member functions. G++ helps GDB by marking the first
12907 parameter for non-static member functions (which is the this
12908 pointer) as artificial. We obtain this information from
12909 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
12910 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
12911 fnp
->voffset
= VOFFSET_STATIC
;
12914 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
12915 dwarf2_full_name (fieldname
, die
, cu
));
12917 /* Get fcontext from DW_AT_containing_type if present. */
12918 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
12919 fnp
->fcontext
= die_containing_type (die
, cu
);
12921 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
12922 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
12924 /* Get accessibility. */
12925 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
12927 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
12929 accessibility
= dwarf2_default_access_attribute (die
, cu
);
12930 switch (accessibility
)
12932 case DW_ACCESS_private
:
12933 fnp
->is_private
= 1;
12935 case DW_ACCESS_protected
:
12936 fnp
->is_protected
= 1;
12940 /* Check for artificial methods. */
12941 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
12942 if (attr
&& DW_UNSND (attr
) != 0)
12943 fnp
->is_artificial
= 1;
12945 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
12947 /* Get index in virtual function table if it is a virtual member
12948 function. For older versions of GCC, this is an offset in the
12949 appropriate virtual table, as specified by DW_AT_containing_type.
12950 For everyone else, it is an expression to be evaluated relative
12951 to the object address. */
12953 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
12956 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
12958 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
12960 /* Old-style GCC. */
12961 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
12963 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
12964 || (DW_BLOCK (attr
)->size
> 1
12965 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
12966 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
12968 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12969 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
12970 dwarf2_complex_location_expr_complaint ();
12972 fnp
->voffset
/= cu
->header
.addr_size
;
12976 dwarf2_complex_location_expr_complaint ();
12978 if (!fnp
->fcontext
)
12980 /* If there is no `this' field and no DW_AT_containing_type,
12981 we cannot actually find a base class context for the
12983 if (TYPE_NFIELDS (this_type
) == 0
12984 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
12986 complaint (&symfile_complaints
,
12987 _("cannot determine context for virtual member "
12988 "function \"%s\" (offset %d)"),
12989 fieldname
, die
->offset
.sect_off
);
12994 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
12998 else if (attr_form_is_section_offset (attr
))
13000 dwarf2_complex_location_expr_complaint ();
13004 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
13010 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
13011 if (attr
&& DW_UNSND (attr
))
13013 /* GCC does this, as of 2008-08-25; PR debug/37237. */
13014 complaint (&symfile_complaints
,
13015 _("Member function \"%s\" (offset %d) is virtual "
13016 "but the vtable offset is not specified"),
13017 fieldname
, die
->offset
.sect_off
);
13018 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13019 TYPE_CPLUS_DYNAMIC (type
) = 1;
13024 /* Create the vector of member function fields, and attach it to the type. */
13027 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
13028 struct dwarf2_cu
*cu
)
13030 struct fnfieldlist
*flp
;
13033 if (cu
->language
== language_ada
)
13034 error (_("unexpected member functions in Ada type"));
13036 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13037 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
13038 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
13040 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
13042 struct nextfnfield
*nfp
= flp
->head
;
13043 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
13046 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
13047 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
13048 fn_flp
->fn_fields
= (struct fn_field
*)
13049 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
13050 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
13051 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
13054 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
13057 /* Returns non-zero if NAME is the name of a vtable member in CU's
13058 language, zero otherwise. */
13060 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
13062 static const char vptr
[] = "_vptr";
13063 static const char vtable
[] = "vtable";
13065 /* Look for the C++ and Java forms of the vtable. */
13066 if ((cu
->language
== language_java
13067 && startswith (name
, vtable
))
13068 || (startswith (name
, vptr
)
13069 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
13075 /* GCC outputs unnamed structures that are really pointers to member
13076 functions, with the ABI-specified layout. If TYPE describes
13077 such a structure, smash it into a member function type.
13079 GCC shouldn't do this; it should just output pointer to member DIEs.
13080 This is GCC PR debug/28767. */
13083 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
13085 struct type
*pfn_type
, *self_type
, *new_type
;
13087 /* Check for a structure with no name and two children. */
13088 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
13091 /* Check for __pfn and __delta members. */
13092 if (TYPE_FIELD_NAME (type
, 0) == NULL
13093 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
13094 || TYPE_FIELD_NAME (type
, 1) == NULL
13095 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
13098 /* Find the type of the method. */
13099 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
13100 if (pfn_type
== NULL
13101 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
13102 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
13105 /* Look for the "this" argument. */
13106 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
13107 if (TYPE_NFIELDS (pfn_type
) == 0
13108 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
13109 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
13112 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
13113 new_type
= alloc_type (objfile
);
13114 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
13115 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
13116 TYPE_VARARGS (pfn_type
));
13117 smash_to_methodptr_type (type
, new_type
);
13120 /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler
13124 producer_is_icc (struct dwarf2_cu
*cu
)
13126 if (!cu
->checked_producer
)
13127 check_producer (cu
);
13129 return cu
->producer_is_icc
;
13132 /* Called when we find the DIE that starts a structure or union scope
13133 (definition) to create a type for the structure or union. Fill in
13134 the type's name and general properties; the members will not be
13135 processed until process_structure_scope. A symbol table entry for
13136 the type will also not be done until process_structure_scope (assuming
13137 the type has a name).
13139 NOTE: we need to call these functions regardless of whether or not the
13140 DIE has a DW_AT_name attribute, since it might be an anonymous
13141 structure or union. This gets the type entered into our set of
13142 user defined types. */
13144 static struct type
*
13145 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13147 struct objfile
*objfile
= cu
->objfile
;
13149 struct attribute
*attr
;
13152 /* If the definition of this type lives in .debug_types, read that type.
13153 Don't follow DW_AT_specification though, that will take us back up
13154 the chain and we want to go down. */
13155 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
13158 type
= get_DW_AT_signature_type (die
, attr
, cu
);
13160 /* The type's CU may not be the same as CU.
13161 Ensure TYPE is recorded with CU in die_type_hash. */
13162 return set_die_type (die
, type
, cu
);
13165 type
= alloc_type (objfile
);
13166 INIT_CPLUS_SPECIFIC (type
);
13168 name
= dwarf2_name (die
, cu
);
13171 if (cu
->language
== language_cplus
13172 || cu
->language
== language_java
13173 || cu
->language
== language_d
13174 || cu
->language
== language_rust
)
13176 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
13178 /* dwarf2_full_name might have already finished building the DIE's
13179 type. If so, there is no need to continue. */
13180 if (get_die_type (die
, cu
) != NULL
)
13181 return get_die_type (die
, cu
);
13183 TYPE_TAG_NAME (type
) = full_name
;
13184 if (die
->tag
== DW_TAG_structure_type
13185 || die
->tag
== DW_TAG_class_type
)
13186 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
13190 /* The name is already allocated along with this objfile, so
13191 we don't need to duplicate it for the type. */
13192 TYPE_TAG_NAME (type
) = name
;
13193 if (die
->tag
== DW_TAG_class_type
)
13194 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
13198 if (die
->tag
== DW_TAG_structure_type
)
13200 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13202 else if (die
->tag
== DW_TAG_union_type
)
13204 TYPE_CODE (type
) = TYPE_CODE_UNION
;
13208 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13211 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
13212 TYPE_DECLARED_CLASS (type
) = 1;
13214 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13217 if (attr_form_is_constant (attr
))
13218 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13221 /* For the moment, dynamic type sizes are not supported
13222 by GDB's struct type. The actual size is determined
13223 on-demand when resolving the type of a given object,
13224 so set the type's length to zero for now. Otherwise,
13225 we record an expression as the length, and that expression
13226 could lead to a very large value, which could eventually
13227 lead to us trying to allocate that much memory when creating
13228 a value of that type. */
13229 TYPE_LENGTH (type
) = 0;
13234 TYPE_LENGTH (type
) = 0;
13237 if (producer_is_icc (cu
) && (TYPE_LENGTH (type
) == 0))
13239 /* ICC does not output the required DW_AT_declaration
13240 on incomplete types, but gives them a size of zero. */
13241 TYPE_STUB (type
) = 1;
13244 TYPE_STUB_SUPPORTED (type
) = 1;
13246 if (die_is_declaration (die
, cu
))
13247 TYPE_STUB (type
) = 1;
13248 else if (attr
== NULL
&& die
->child
== NULL
13249 && producer_is_realview (cu
->producer
))
13250 /* RealView does not output the required DW_AT_declaration
13251 on incomplete types. */
13252 TYPE_STUB (type
) = 1;
13254 /* We need to add the type field to the die immediately so we don't
13255 infinitely recurse when dealing with pointers to the structure
13256 type within the structure itself. */
13257 set_die_type (die
, type
, cu
);
13259 /* set_die_type should be already done. */
13260 set_descriptive_type (type
, die
, cu
);
13265 /* Finish creating a structure or union type, including filling in
13266 its members and creating a symbol for it. */
13269 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13271 struct objfile
*objfile
= cu
->objfile
;
13272 struct die_info
*child_die
;
13275 type
= get_die_type (die
, cu
);
13277 type
= read_structure_type (die
, cu
);
13279 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
13281 struct field_info fi
;
13282 VEC (symbolp
) *template_args
= NULL
;
13283 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
13285 memset (&fi
, 0, sizeof (struct field_info
));
13287 child_die
= die
->child
;
13289 while (child_die
&& child_die
->tag
)
13291 if (child_die
->tag
== DW_TAG_member
13292 || child_die
->tag
== DW_TAG_variable
)
13294 /* NOTE: carlton/2002-11-05: A C++ static data member
13295 should be a DW_TAG_member that is a declaration, but
13296 all versions of G++ as of this writing (so through at
13297 least 3.2.1) incorrectly generate DW_TAG_variable
13298 tags for them instead. */
13299 dwarf2_add_field (&fi
, child_die
, cu
);
13301 else if (child_die
->tag
== DW_TAG_subprogram
)
13303 /* C++ member function. */
13304 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
13306 else if (child_die
->tag
== DW_TAG_inheritance
)
13308 /* C++ base class field. */
13309 dwarf2_add_field (&fi
, child_die
, cu
);
13311 else if (child_die
->tag
== DW_TAG_typedef
)
13312 dwarf2_add_typedef (&fi
, child_die
, cu
);
13313 else if (child_die
->tag
== DW_TAG_template_type_param
13314 || child_die
->tag
== DW_TAG_template_value_param
)
13316 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13319 VEC_safe_push (symbolp
, template_args
, arg
);
13322 child_die
= sibling_die (child_die
);
13325 /* Attach template arguments to type. */
13326 if (! VEC_empty (symbolp
, template_args
))
13328 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13329 TYPE_N_TEMPLATE_ARGUMENTS (type
)
13330 = VEC_length (symbolp
, template_args
);
13331 TYPE_TEMPLATE_ARGUMENTS (type
)
13332 = XOBNEWVEC (&objfile
->objfile_obstack
,
13334 TYPE_N_TEMPLATE_ARGUMENTS (type
));
13335 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
13336 VEC_address (symbolp
, template_args
),
13337 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
13338 * sizeof (struct symbol
*)));
13339 VEC_free (symbolp
, template_args
);
13342 /* Attach fields and member functions to the type. */
13344 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
13347 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
13349 /* Get the type which refers to the base class (possibly this
13350 class itself) which contains the vtable pointer for the current
13351 class from the DW_AT_containing_type attribute. This use of
13352 DW_AT_containing_type is a GNU extension. */
13354 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
13356 struct type
*t
= die_containing_type (die
, cu
);
13358 set_type_vptr_basetype (type
, t
);
13363 /* Our own class provides vtbl ptr. */
13364 for (i
= TYPE_NFIELDS (t
) - 1;
13365 i
>= TYPE_N_BASECLASSES (t
);
13368 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
13370 if (is_vtable_name (fieldname
, cu
))
13372 set_type_vptr_fieldno (type
, i
);
13377 /* Complain if virtual function table field not found. */
13378 if (i
< TYPE_N_BASECLASSES (t
))
13379 complaint (&symfile_complaints
,
13380 _("virtual function table pointer "
13381 "not found when defining class '%s'"),
13382 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
13387 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
13390 else if (cu
->producer
13391 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
13393 /* The IBM XLC compiler does not provide direct indication
13394 of the containing type, but the vtable pointer is
13395 always named __vfp. */
13399 for (i
= TYPE_NFIELDS (type
) - 1;
13400 i
>= TYPE_N_BASECLASSES (type
);
13403 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
13405 set_type_vptr_fieldno (type
, i
);
13406 set_type_vptr_basetype (type
, type
);
13413 /* Copy fi.typedef_field_list linked list elements content into the
13414 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
13415 if (fi
.typedef_field_list
)
13417 int i
= fi
.typedef_field_list_count
;
13419 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13420 TYPE_TYPEDEF_FIELD_ARRAY (type
)
13421 = ((struct typedef_field
*)
13422 TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
));
13423 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
13425 /* Reverse the list order to keep the debug info elements order. */
13428 struct typedef_field
*dest
, *src
;
13430 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
13431 src
= &fi
.typedef_field_list
->field
;
13432 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
13437 do_cleanups (back_to
);
13439 if (HAVE_CPLUS_STRUCT (type
))
13440 TYPE_CPLUS_REALLY_JAVA (type
) = cu
->language
== language_java
;
13443 quirk_gcc_member_function_pointer (type
, objfile
);
13445 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
13446 snapshots) has been known to create a die giving a declaration
13447 for a class that has, as a child, a die giving a definition for a
13448 nested class. So we have to process our children even if the
13449 current die is a declaration. Normally, of course, a declaration
13450 won't have any children at all. */
13452 child_die
= die
->child
;
13454 while (child_die
!= NULL
&& child_die
->tag
)
13456 if (child_die
->tag
== DW_TAG_member
13457 || child_die
->tag
== DW_TAG_variable
13458 || child_die
->tag
== DW_TAG_inheritance
13459 || child_die
->tag
== DW_TAG_template_value_param
13460 || child_die
->tag
== DW_TAG_template_type_param
)
13465 process_die (child_die
, cu
);
13467 child_die
= sibling_die (child_die
);
13470 /* Do not consider external references. According to the DWARF standard,
13471 these DIEs are identified by the fact that they have no byte_size
13472 attribute, and a declaration attribute. */
13473 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
13474 || !die_is_declaration (die
, cu
))
13475 new_symbol (die
, type
, cu
);
13478 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
13479 update TYPE using some information only available in DIE's children. */
13482 update_enumeration_type_from_children (struct die_info
*die
,
13484 struct dwarf2_cu
*cu
)
13486 struct obstack obstack
;
13487 struct die_info
*child_die
;
13488 int unsigned_enum
= 1;
13491 struct cleanup
*old_chain
;
13493 obstack_init (&obstack
);
13494 old_chain
= make_cleanup_obstack_free (&obstack
);
13496 for (child_die
= die
->child
;
13497 child_die
!= NULL
&& child_die
->tag
;
13498 child_die
= sibling_die (child_die
))
13500 struct attribute
*attr
;
13502 const gdb_byte
*bytes
;
13503 struct dwarf2_locexpr_baton
*baton
;
13506 if (child_die
->tag
!= DW_TAG_enumerator
)
13509 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
13513 name
= dwarf2_name (child_die
, cu
);
13515 name
= "<anonymous enumerator>";
13517 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
13518 &value
, &bytes
, &baton
);
13524 else if ((mask
& value
) != 0)
13529 /* If we already know that the enum type is neither unsigned, nor
13530 a flag type, no need to look at the rest of the enumerates. */
13531 if (!unsigned_enum
&& !flag_enum
)
13536 TYPE_UNSIGNED (type
) = 1;
13538 TYPE_FLAG_ENUM (type
) = 1;
13540 do_cleanups (old_chain
);
13543 /* Given a DW_AT_enumeration_type die, set its type. We do not
13544 complete the type's fields yet, or create any symbols. */
13546 static struct type
*
13547 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13549 struct objfile
*objfile
= cu
->objfile
;
13551 struct attribute
*attr
;
13554 /* If the definition of this type lives in .debug_types, read that type.
13555 Don't follow DW_AT_specification though, that will take us back up
13556 the chain and we want to go down. */
13557 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
13560 type
= get_DW_AT_signature_type (die
, attr
, cu
);
13562 /* The type's CU may not be the same as CU.
13563 Ensure TYPE is recorded with CU in die_type_hash. */
13564 return set_die_type (die
, type
, cu
);
13567 type
= alloc_type (objfile
);
13569 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
13570 name
= dwarf2_full_name (NULL
, die
, cu
);
13572 TYPE_TAG_NAME (type
) = name
;
13574 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
13577 struct type
*underlying_type
= die_type (die
, cu
);
13579 TYPE_TARGET_TYPE (type
) = underlying_type
;
13582 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13585 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13589 TYPE_LENGTH (type
) = 0;
13592 /* The enumeration DIE can be incomplete. In Ada, any type can be
13593 declared as private in the package spec, and then defined only
13594 inside the package body. Such types are known as Taft Amendment
13595 Types. When another package uses such a type, an incomplete DIE
13596 may be generated by the compiler. */
13597 if (die_is_declaration (die
, cu
))
13598 TYPE_STUB (type
) = 1;
13600 /* Finish the creation of this type by using the enum's children.
13601 We must call this even when the underlying type has been provided
13602 so that we can determine if we're looking at a "flag" enum. */
13603 update_enumeration_type_from_children (die
, type
, cu
);
13605 /* If this type has an underlying type that is not a stub, then we
13606 may use its attributes. We always use the "unsigned" attribute
13607 in this situation, because ordinarily we guess whether the type
13608 is unsigned -- but the guess can be wrong and the underlying type
13609 can tell us the reality. However, we defer to a local size
13610 attribute if one exists, because this lets the compiler override
13611 the underlying type if needed. */
13612 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
13614 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
13615 if (TYPE_LENGTH (type
) == 0)
13616 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
13619 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
13621 return set_die_type (die
, type
, cu
);
13624 /* Given a pointer to a die which begins an enumeration, process all
13625 the dies that define the members of the enumeration, and create the
13626 symbol for the enumeration type.
13628 NOTE: We reverse the order of the element list. */
13631 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13633 struct type
*this_type
;
13635 this_type
= get_die_type (die
, cu
);
13636 if (this_type
== NULL
)
13637 this_type
= read_enumeration_type (die
, cu
);
13639 if (die
->child
!= NULL
)
13641 struct die_info
*child_die
;
13642 struct symbol
*sym
;
13643 struct field
*fields
= NULL
;
13644 int num_fields
= 0;
13647 child_die
= die
->child
;
13648 while (child_die
&& child_die
->tag
)
13650 if (child_die
->tag
!= DW_TAG_enumerator
)
13652 process_die (child_die
, cu
);
13656 name
= dwarf2_name (child_die
, cu
);
13659 sym
= new_symbol (child_die
, this_type
, cu
);
13661 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
13663 fields
= (struct field
*)
13665 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
13666 * sizeof (struct field
));
13669 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
13670 FIELD_TYPE (fields
[num_fields
]) = NULL
;
13671 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
13672 FIELD_BITSIZE (fields
[num_fields
]) = 0;
13678 child_die
= sibling_die (child_die
);
13683 TYPE_NFIELDS (this_type
) = num_fields
;
13684 TYPE_FIELDS (this_type
) = (struct field
*)
13685 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
13686 memcpy (TYPE_FIELDS (this_type
), fields
,
13687 sizeof (struct field
) * num_fields
);
13692 /* If we are reading an enum from a .debug_types unit, and the enum
13693 is a declaration, and the enum is not the signatured type in the
13694 unit, then we do not want to add a symbol for it. Adding a
13695 symbol would in some cases obscure the true definition of the
13696 enum, giving users an incomplete type when the definition is
13697 actually available. Note that we do not want to do this for all
13698 enums which are just declarations, because C++0x allows forward
13699 enum declarations. */
13700 if (cu
->per_cu
->is_debug_types
13701 && die_is_declaration (die
, cu
))
13703 struct signatured_type
*sig_type
;
13705 sig_type
= (struct signatured_type
*) cu
->per_cu
;
13706 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
13707 if (sig_type
->type_offset_in_section
.sect_off
!= die
->offset
.sect_off
)
13711 new_symbol (die
, this_type
, cu
);
13714 /* Extract all information from a DW_TAG_array_type DIE and put it in
13715 the DIE's type field. For now, this only handles one dimensional
13718 static struct type
*
13719 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13721 struct objfile
*objfile
= cu
->objfile
;
13722 struct die_info
*child_die
;
13724 struct type
*element_type
, *range_type
, *index_type
;
13725 struct type
**range_types
= NULL
;
13726 struct attribute
*attr
;
13728 struct cleanup
*back_to
;
13730 unsigned int bit_stride
= 0;
13732 element_type
= die_type (die
, cu
);
13734 /* The die_type call above may have already set the type for this DIE. */
13735 type
= get_die_type (die
, cu
);
13739 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
13741 bit_stride
= DW_UNSND (attr
) * 8;
13743 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
13745 bit_stride
= DW_UNSND (attr
);
13747 /* Irix 6.2 native cc creates array types without children for
13748 arrays with unspecified length. */
13749 if (die
->child
== NULL
)
13751 index_type
= objfile_type (objfile
)->builtin_int
;
13752 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
13753 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
13755 return set_die_type (die
, type
, cu
);
13758 back_to
= make_cleanup (null_cleanup
, NULL
);
13759 child_die
= die
->child
;
13760 while (child_die
&& child_die
->tag
)
13762 if (child_die
->tag
== DW_TAG_subrange_type
)
13764 struct type
*child_type
= read_type_die (child_die
, cu
);
13766 if (child_type
!= NULL
)
13768 /* The range type was succesfully read. Save it for the
13769 array type creation. */
13770 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
13772 range_types
= (struct type
**)
13773 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
13774 * sizeof (struct type
*));
13776 make_cleanup (free_current_contents
, &range_types
);
13778 range_types
[ndim
++] = child_type
;
13781 child_die
= sibling_die (child_die
);
13784 /* Dwarf2 dimensions are output from left to right, create the
13785 necessary array types in backwards order. */
13787 type
= element_type
;
13789 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
13794 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
13800 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
13804 /* Understand Dwarf2 support for vector types (like they occur on
13805 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
13806 array type. This is not part of the Dwarf2/3 standard yet, but a
13807 custom vendor extension. The main difference between a regular
13808 array and the vector variant is that vectors are passed by value
13810 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
13812 make_vector_type (type
);
13814 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
13815 implementation may choose to implement triple vectors using this
13817 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13820 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
13821 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13823 complaint (&symfile_complaints
,
13824 _("DW_AT_byte_size for array type smaller "
13825 "than the total size of elements"));
13828 name
= dwarf2_name (die
, cu
);
13830 TYPE_NAME (type
) = name
;
13832 /* Install the type in the die. */
13833 set_die_type (die
, type
, cu
);
13835 /* set_die_type should be already done. */
13836 set_descriptive_type (type
, die
, cu
);
13838 do_cleanups (back_to
);
13843 static enum dwarf_array_dim_ordering
13844 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
13846 struct attribute
*attr
;
13848 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
13851 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
13853 /* GNU F77 is a special case, as at 08/2004 array type info is the
13854 opposite order to the dwarf2 specification, but data is still
13855 laid out as per normal fortran.
13857 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
13858 version checking. */
13860 if (cu
->language
== language_fortran
13861 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
13863 return DW_ORD_row_major
;
13866 switch (cu
->language_defn
->la_array_ordering
)
13868 case array_column_major
:
13869 return DW_ORD_col_major
;
13870 case array_row_major
:
13872 return DW_ORD_row_major
;
13876 /* Extract all information from a DW_TAG_set_type DIE and put it in
13877 the DIE's type field. */
13879 static struct type
*
13880 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13882 struct type
*domain_type
, *set_type
;
13883 struct attribute
*attr
;
13885 domain_type
= die_type (die
, cu
);
13887 /* The die_type call above may have already set the type for this DIE. */
13888 set_type
= get_die_type (die
, cu
);
13892 set_type
= create_set_type (NULL
, domain_type
);
13894 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13896 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
13898 return set_die_type (die
, set_type
, cu
);
13901 /* A helper for read_common_block that creates a locexpr baton.
13902 SYM is the symbol which we are marking as computed.
13903 COMMON_DIE is the DIE for the common block.
13904 COMMON_LOC is the location expression attribute for the common
13906 MEMBER_LOC is the location expression attribute for the particular
13907 member of the common block that we are processing.
13908 CU is the CU from which the above come. */
13911 mark_common_block_symbol_computed (struct symbol
*sym
,
13912 struct die_info
*common_die
,
13913 struct attribute
*common_loc
,
13914 struct attribute
*member_loc
,
13915 struct dwarf2_cu
*cu
)
13917 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13918 struct dwarf2_locexpr_baton
*baton
;
13920 unsigned int cu_off
;
13921 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
13922 LONGEST offset
= 0;
13924 gdb_assert (common_loc
&& member_loc
);
13925 gdb_assert (attr_form_is_block (common_loc
));
13926 gdb_assert (attr_form_is_block (member_loc
)
13927 || attr_form_is_constant (member_loc
));
13929 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
13930 baton
->per_cu
= cu
->per_cu
;
13931 gdb_assert (baton
->per_cu
);
13933 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
13935 if (attr_form_is_constant (member_loc
))
13937 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
13938 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
13941 baton
->size
+= DW_BLOCK (member_loc
)->size
;
13943 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
13946 *ptr
++ = DW_OP_call4
;
13947 cu_off
= common_die
->offset
.sect_off
- cu
->per_cu
->offset
.sect_off
;
13948 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
13951 if (attr_form_is_constant (member_loc
))
13953 *ptr
++ = DW_OP_addr
;
13954 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
13955 ptr
+= cu
->header
.addr_size
;
13959 /* We have to copy the data here, because DW_OP_call4 will only
13960 use a DW_AT_location attribute. */
13961 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
13962 ptr
+= DW_BLOCK (member_loc
)->size
;
13965 *ptr
++ = DW_OP_plus
;
13966 gdb_assert (ptr
- baton
->data
== baton
->size
);
13968 SYMBOL_LOCATION_BATON (sym
) = baton
;
13969 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
13972 /* Create appropriate locally-scoped variables for all the
13973 DW_TAG_common_block entries. Also create a struct common_block
13974 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
13975 is used to sepate the common blocks name namespace from regular
13979 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
13981 struct attribute
*attr
;
13983 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
13986 /* Support the .debug_loc offsets. */
13987 if (attr_form_is_block (attr
))
13991 else if (attr_form_is_section_offset (attr
))
13993 dwarf2_complex_location_expr_complaint ();
13998 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
13999 "common block member");
14004 if (die
->child
!= NULL
)
14006 struct objfile
*objfile
= cu
->objfile
;
14007 struct die_info
*child_die
;
14008 size_t n_entries
= 0, size
;
14009 struct common_block
*common_block
;
14010 struct symbol
*sym
;
14012 for (child_die
= die
->child
;
14013 child_die
&& child_die
->tag
;
14014 child_die
= sibling_die (child_die
))
14017 size
= (sizeof (struct common_block
)
14018 + (n_entries
- 1) * sizeof (struct symbol
*));
14020 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
14022 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
14023 common_block
->n_entries
= 0;
14025 for (child_die
= die
->child
;
14026 child_die
&& child_die
->tag
;
14027 child_die
= sibling_die (child_die
))
14029 /* Create the symbol in the DW_TAG_common_block block in the current
14031 sym
= new_symbol (child_die
, NULL
, cu
);
14034 struct attribute
*member_loc
;
14036 common_block
->contents
[common_block
->n_entries
++] = sym
;
14038 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
14042 /* GDB has handled this for a long time, but it is
14043 not specified by DWARF. It seems to have been
14044 emitted by gfortran at least as recently as:
14045 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
14046 complaint (&symfile_complaints
,
14047 _("Variable in common block has "
14048 "DW_AT_data_member_location "
14049 "- DIE at 0x%x [in module %s]"),
14050 child_die
->offset
.sect_off
,
14051 objfile_name (cu
->objfile
));
14053 if (attr_form_is_section_offset (member_loc
))
14054 dwarf2_complex_location_expr_complaint ();
14055 else if (attr_form_is_constant (member_loc
)
14056 || attr_form_is_block (member_loc
))
14059 mark_common_block_symbol_computed (sym
, die
, attr
,
14063 dwarf2_complex_location_expr_complaint ();
14068 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
14069 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
14073 /* Create a type for a C++ namespace. */
14075 static struct type
*
14076 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14078 struct objfile
*objfile
= cu
->objfile
;
14079 const char *previous_prefix
, *name
;
14083 /* For extensions, reuse the type of the original namespace. */
14084 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
14086 struct die_info
*ext_die
;
14087 struct dwarf2_cu
*ext_cu
= cu
;
14089 ext_die
= dwarf2_extension (die
, &ext_cu
);
14090 type
= read_type_die (ext_die
, ext_cu
);
14092 /* EXT_CU may not be the same as CU.
14093 Ensure TYPE is recorded with CU in die_type_hash. */
14094 return set_die_type (die
, type
, cu
);
14097 name
= namespace_name (die
, &is_anonymous
, cu
);
14099 /* Now build the name of the current namespace. */
14101 previous_prefix
= determine_prefix (die
, cu
);
14102 if (previous_prefix
[0] != '\0')
14103 name
= typename_concat (&objfile
->objfile_obstack
,
14104 previous_prefix
, name
, 0, cu
);
14106 /* Create the type. */
14107 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
14109 TYPE_NAME (type
) = name
;
14110 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
14112 return set_die_type (die
, type
, cu
);
14115 /* Read a namespace scope. */
14118 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
14120 struct objfile
*objfile
= cu
->objfile
;
14123 /* Add a symbol associated to this if we haven't seen the namespace
14124 before. Also, add a using directive if it's an anonymous
14127 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
14131 type
= read_type_die (die
, cu
);
14132 new_symbol (die
, type
, cu
);
14134 namespace_name (die
, &is_anonymous
, cu
);
14137 const char *previous_prefix
= determine_prefix (die
, cu
);
14139 add_using_directive (using_directives (cu
->language
),
14140 previous_prefix
, TYPE_NAME (type
), NULL
,
14141 NULL
, NULL
, 0, &objfile
->objfile_obstack
);
14145 if (die
->child
!= NULL
)
14147 struct die_info
*child_die
= die
->child
;
14149 while (child_die
&& child_die
->tag
)
14151 process_die (child_die
, cu
);
14152 child_die
= sibling_die (child_die
);
14157 /* Read a Fortran module as type. This DIE can be only a declaration used for
14158 imported module. Still we need that type as local Fortran "use ... only"
14159 declaration imports depend on the created type in determine_prefix. */
14161 static struct type
*
14162 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14164 struct objfile
*objfile
= cu
->objfile
;
14165 const char *module_name
;
14168 module_name
= dwarf2_name (die
, cu
);
14170 complaint (&symfile_complaints
,
14171 _("DW_TAG_module has no name, offset 0x%x"),
14172 die
->offset
.sect_off
);
14173 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
14175 /* determine_prefix uses TYPE_TAG_NAME. */
14176 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
14178 return set_die_type (die
, type
, cu
);
14181 /* Read a Fortran module. */
14184 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
14186 struct die_info
*child_die
= die
->child
;
14189 type
= read_type_die (die
, cu
);
14190 new_symbol (die
, type
, cu
);
14192 while (child_die
&& child_die
->tag
)
14194 process_die (child_die
, cu
);
14195 child_die
= sibling_die (child_die
);
14199 /* Return the name of the namespace represented by DIE. Set
14200 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
14203 static const char *
14204 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
14206 struct die_info
*current_die
;
14207 const char *name
= NULL
;
14209 /* Loop through the extensions until we find a name. */
14211 for (current_die
= die
;
14212 current_die
!= NULL
;
14213 current_die
= dwarf2_extension (die
, &cu
))
14215 /* We don't use dwarf2_name here so that we can detect the absence
14216 of a name -> anonymous namespace. */
14217 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
14223 /* Is it an anonymous namespace? */
14225 *is_anonymous
= (name
== NULL
);
14227 name
= CP_ANONYMOUS_NAMESPACE_STR
;
14232 /* Extract all information from a DW_TAG_pointer_type DIE and add to
14233 the user defined type vector. */
14235 static struct type
*
14236 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14238 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
14239 struct comp_unit_head
*cu_header
= &cu
->header
;
14241 struct attribute
*attr_byte_size
;
14242 struct attribute
*attr_address_class
;
14243 int byte_size
, addr_class
;
14244 struct type
*target_type
;
14246 target_type
= die_type (die
, cu
);
14248 /* The die_type call above may have already set the type for this DIE. */
14249 type
= get_die_type (die
, cu
);
14253 type
= lookup_pointer_type (target_type
);
14255 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14256 if (attr_byte_size
)
14257 byte_size
= DW_UNSND (attr_byte_size
);
14259 byte_size
= cu_header
->addr_size
;
14261 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
14262 if (attr_address_class
)
14263 addr_class
= DW_UNSND (attr_address_class
);
14265 addr_class
= DW_ADDR_none
;
14267 /* If the pointer size or address class is different than the
14268 default, create a type variant marked as such and set the
14269 length accordingly. */
14270 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
14272 if (gdbarch_address_class_type_flags_p (gdbarch
))
14276 type_flags
= gdbarch_address_class_type_flags
14277 (gdbarch
, byte_size
, addr_class
);
14278 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
14280 type
= make_type_with_address_space (type
, type_flags
);
14282 else if (TYPE_LENGTH (type
) != byte_size
)
14284 complaint (&symfile_complaints
,
14285 _("invalid pointer size %d"), byte_size
);
14289 /* Should we also complain about unhandled address classes? */
14293 TYPE_LENGTH (type
) = byte_size
;
14294 return set_die_type (die
, type
, cu
);
14297 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
14298 the user defined type vector. */
14300 static struct type
*
14301 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14304 struct type
*to_type
;
14305 struct type
*domain
;
14307 to_type
= die_type (die
, cu
);
14308 domain
= die_containing_type (die
, cu
);
14310 /* The calls above may have already set the type for this DIE. */
14311 type
= get_die_type (die
, cu
);
14315 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
14316 type
= lookup_methodptr_type (to_type
);
14317 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
14319 struct type
*new_type
= alloc_type (cu
->objfile
);
14321 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
14322 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
14323 TYPE_VARARGS (to_type
));
14324 type
= lookup_methodptr_type (new_type
);
14327 type
= lookup_memberptr_type (to_type
, domain
);
14329 return set_die_type (die
, type
, cu
);
14332 /* Extract all information from a DW_TAG_reference_type DIE and add to
14333 the user defined type vector. */
14335 static struct type
*
14336 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14338 struct comp_unit_head
*cu_header
= &cu
->header
;
14339 struct type
*type
, *target_type
;
14340 struct attribute
*attr
;
14342 target_type
= die_type (die
, cu
);
14344 /* The die_type call above may have already set the type for this DIE. */
14345 type
= get_die_type (die
, cu
);
14349 type
= lookup_reference_type (target_type
);
14350 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14353 TYPE_LENGTH (type
) = DW_UNSND (attr
);
14357 TYPE_LENGTH (type
) = cu_header
->addr_size
;
14359 return set_die_type (die
, type
, cu
);
14362 /* Add the given cv-qualifiers to the element type of the array. GCC
14363 outputs DWARF type qualifiers that apply to an array, not the
14364 element type. But GDB relies on the array element type to carry
14365 the cv-qualifiers. This mimics section 6.7.3 of the C99
14368 static struct type
*
14369 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
14370 struct type
*base_type
, int cnst
, int voltl
)
14372 struct type
*el_type
, *inner_array
;
14374 base_type
= copy_type (base_type
);
14375 inner_array
= base_type
;
14377 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
14379 TYPE_TARGET_TYPE (inner_array
) =
14380 copy_type (TYPE_TARGET_TYPE (inner_array
));
14381 inner_array
= TYPE_TARGET_TYPE (inner_array
);
14384 el_type
= TYPE_TARGET_TYPE (inner_array
);
14385 cnst
|= TYPE_CONST (el_type
);
14386 voltl
|= TYPE_VOLATILE (el_type
);
14387 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
14389 return set_die_type (die
, base_type
, cu
);
14392 static struct type
*
14393 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14395 struct type
*base_type
, *cv_type
;
14397 base_type
= die_type (die
, cu
);
14399 /* The die_type call above may have already set the type for this DIE. */
14400 cv_type
= get_die_type (die
, cu
);
14404 /* In case the const qualifier is applied to an array type, the element type
14405 is so qualified, not the array type (section 6.7.3 of C99). */
14406 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14407 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
14409 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
14410 return set_die_type (die
, cv_type
, cu
);
14413 static struct type
*
14414 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14416 struct type
*base_type
, *cv_type
;
14418 base_type
= die_type (die
, cu
);
14420 /* The die_type call above may have already set the type for this DIE. */
14421 cv_type
= get_die_type (die
, cu
);
14425 /* In case the volatile qualifier is applied to an array type, the
14426 element type is so qualified, not the array type (section 6.7.3
14428 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14429 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
14431 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
14432 return set_die_type (die
, cv_type
, cu
);
14435 /* Handle DW_TAG_restrict_type. */
14437 static struct type
*
14438 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14440 struct type
*base_type
, *cv_type
;
14442 base_type
= die_type (die
, cu
);
14444 /* The die_type call above may have already set the type for this DIE. */
14445 cv_type
= get_die_type (die
, cu
);
14449 cv_type
= make_restrict_type (base_type
);
14450 return set_die_type (die
, cv_type
, cu
);
14453 /* Handle DW_TAG_atomic_type. */
14455 static struct type
*
14456 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14458 struct type
*base_type
, *cv_type
;
14460 base_type
= die_type (die
, cu
);
14462 /* The die_type call above may have already set the type for this DIE. */
14463 cv_type
= get_die_type (die
, cu
);
14467 cv_type
= make_atomic_type (base_type
);
14468 return set_die_type (die
, cv_type
, cu
);
14471 /* Extract all information from a DW_TAG_string_type DIE and add to
14472 the user defined type vector. It isn't really a user defined type,
14473 but it behaves like one, with other DIE's using an AT_user_def_type
14474 attribute to reference it. */
14476 static struct type
*
14477 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14479 struct objfile
*objfile
= cu
->objfile
;
14480 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14481 struct type
*type
, *range_type
, *index_type
, *char_type
;
14482 struct attribute
*attr
;
14483 unsigned int length
;
14485 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
14488 length
= DW_UNSND (attr
);
14492 /* Check for the DW_AT_byte_size attribute. */
14493 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14496 length
= DW_UNSND (attr
);
14504 index_type
= objfile_type (objfile
)->builtin_int
;
14505 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
14506 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
14507 type
= create_string_type (NULL
, char_type
, range_type
);
14509 return set_die_type (die
, type
, cu
);
14512 /* Assuming that DIE corresponds to a function, returns nonzero
14513 if the function is prototyped. */
14516 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
14518 struct attribute
*attr
;
14520 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
14521 if (attr
&& (DW_UNSND (attr
) != 0))
14524 /* The DWARF standard implies that the DW_AT_prototyped attribute
14525 is only meaninful for C, but the concept also extends to other
14526 languages that allow unprototyped functions (Eg: Objective C).
14527 For all other languages, assume that functions are always
14529 if (cu
->language
!= language_c
14530 && cu
->language
!= language_objc
14531 && cu
->language
!= language_opencl
)
14534 /* RealView does not emit DW_AT_prototyped. We can not distinguish
14535 prototyped and unprototyped functions; default to prototyped,
14536 since that is more common in modern code (and RealView warns
14537 about unprototyped functions). */
14538 if (producer_is_realview (cu
->producer
))
14544 /* Handle DIES due to C code like:
14548 int (*funcp)(int a, long l);
14552 ('funcp' generates a DW_TAG_subroutine_type DIE). */
14554 static struct type
*
14555 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14557 struct objfile
*objfile
= cu
->objfile
;
14558 struct type
*type
; /* Type that this function returns. */
14559 struct type
*ftype
; /* Function that returns above type. */
14560 struct attribute
*attr
;
14562 type
= die_type (die
, cu
);
14564 /* The die_type call above may have already set the type for this DIE. */
14565 ftype
= get_die_type (die
, cu
);
14569 ftype
= lookup_function_type (type
);
14571 if (prototyped_function_p (die
, cu
))
14572 TYPE_PROTOTYPED (ftype
) = 1;
14574 /* Store the calling convention in the type if it's available in
14575 the subroutine die. Otherwise set the calling convention to
14576 the default value DW_CC_normal. */
14577 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
14579 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
14580 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
14581 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
14583 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
14585 /* Record whether the function returns normally to its caller or not
14586 if the DWARF producer set that information. */
14587 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
14588 if (attr
&& (DW_UNSND (attr
) != 0))
14589 TYPE_NO_RETURN (ftype
) = 1;
14591 /* We need to add the subroutine type to the die immediately so
14592 we don't infinitely recurse when dealing with parameters
14593 declared as the same subroutine type. */
14594 set_die_type (die
, ftype
, cu
);
14596 if (die
->child
!= NULL
)
14598 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
14599 struct die_info
*child_die
;
14600 int nparams
, iparams
;
14602 /* Count the number of parameters.
14603 FIXME: GDB currently ignores vararg functions, but knows about
14604 vararg member functions. */
14606 child_die
= die
->child
;
14607 while (child_die
&& child_die
->tag
)
14609 if (child_die
->tag
== DW_TAG_formal_parameter
)
14611 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
14612 TYPE_VARARGS (ftype
) = 1;
14613 child_die
= sibling_die (child_die
);
14616 /* Allocate storage for parameters and fill them in. */
14617 TYPE_NFIELDS (ftype
) = nparams
;
14618 TYPE_FIELDS (ftype
) = (struct field
*)
14619 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
14621 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
14622 even if we error out during the parameters reading below. */
14623 for (iparams
= 0; iparams
< nparams
; iparams
++)
14624 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
14627 child_die
= die
->child
;
14628 while (child_die
&& child_die
->tag
)
14630 if (child_die
->tag
== DW_TAG_formal_parameter
)
14632 struct type
*arg_type
;
14634 /* DWARF version 2 has no clean way to discern C++
14635 static and non-static member functions. G++ helps
14636 GDB by marking the first parameter for non-static
14637 member functions (which is the this pointer) as
14638 artificial. We pass this information to
14639 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
14641 DWARF version 3 added DW_AT_object_pointer, which GCC
14642 4.5 does not yet generate. */
14643 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
14645 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
14648 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
14650 /* GCC/43521: In java, the formal parameter
14651 "this" is sometimes not marked with DW_AT_artificial. */
14652 if (cu
->language
== language_java
)
14654 const char *name
= dwarf2_name (child_die
, cu
);
14656 if (name
&& !strcmp (name
, "this"))
14657 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
14660 arg_type
= die_type (child_die
, cu
);
14662 /* RealView does not mark THIS as const, which the testsuite
14663 expects. GCC marks THIS as const in method definitions,
14664 but not in the class specifications (GCC PR 43053). */
14665 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
14666 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
14669 struct dwarf2_cu
*arg_cu
= cu
;
14670 const char *name
= dwarf2_name (child_die
, cu
);
14672 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
14675 /* If the compiler emits this, use it. */
14676 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
14679 else if (name
&& strcmp (name
, "this") == 0)
14680 /* Function definitions will have the argument names. */
14682 else if (name
== NULL
&& iparams
== 0)
14683 /* Declarations may not have the names, so like
14684 elsewhere in GDB, assume an artificial first
14685 argument is "this". */
14689 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
14693 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
14696 child_die
= sibling_die (child_die
);
14703 static struct type
*
14704 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
14706 struct objfile
*objfile
= cu
->objfile
;
14707 const char *name
= NULL
;
14708 struct type
*this_type
, *target_type
;
14710 name
= dwarf2_full_name (NULL
, die
, cu
);
14711 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
14712 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
14713 TYPE_NAME (this_type
) = name
;
14714 set_die_type (die
, this_type
, cu
);
14715 target_type
= die_type (die
, cu
);
14716 if (target_type
!= this_type
)
14717 TYPE_TARGET_TYPE (this_type
) = target_type
;
14720 /* Self-referential typedefs are, it seems, not allowed by the DWARF
14721 spec and cause infinite loops in GDB. */
14722 complaint (&symfile_complaints
,
14723 _("Self-referential DW_TAG_typedef "
14724 "- DIE at 0x%x [in module %s]"),
14725 die
->offset
.sect_off
, objfile_name (objfile
));
14726 TYPE_TARGET_TYPE (this_type
) = NULL
;
14731 /* Find a representation of a given base type and install
14732 it in the TYPE field of the die. */
14734 static struct type
*
14735 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14737 struct objfile
*objfile
= cu
->objfile
;
14739 struct attribute
*attr
;
14740 int encoding
= 0, size
= 0;
14742 enum type_code code
= TYPE_CODE_INT
;
14743 int type_flags
= 0;
14744 struct type
*target_type
= NULL
;
14746 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
14749 encoding
= DW_UNSND (attr
);
14751 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14754 size
= DW_UNSND (attr
);
14756 name
= dwarf2_name (die
, cu
);
14759 complaint (&symfile_complaints
,
14760 _("DW_AT_name missing from DW_TAG_base_type"));
14765 case DW_ATE_address
:
14766 /* Turn DW_ATE_address into a void * pointer. */
14767 code
= TYPE_CODE_PTR
;
14768 type_flags
|= TYPE_FLAG_UNSIGNED
;
14769 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
14771 case DW_ATE_boolean
:
14772 code
= TYPE_CODE_BOOL
;
14773 type_flags
|= TYPE_FLAG_UNSIGNED
;
14775 case DW_ATE_complex_float
:
14776 code
= TYPE_CODE_COMPLEX
;
14777 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
14779 case DW_ATE_decimal_float
:
14780 code
= TYPE_CODE_DECFLOAT
;
14783 code
= TYPE_CODE_FLT
;
14785 case DW_ATE_signed
:
14787 case DW_ATE_unsigned
:
14788 type_flags
|= TYPE_FLAG_UNSIGNED
;
14789 if (cu
->language
== language_fortran
14791 && startswith (name
, "character("))
14792 code
= TYPE_CODE_CHAR
;
14794 case DW_ATE_signed_char
:
14795 if (cu
->language
== language_ada
|| cu
->language
== language_m2
14796 || cu
->language
== language_pascal
14797 || cu
->language
== language_fortran
)
14798 code
= TYPE_CODE_CHAR
;
14800 case DW_ATE_unsigned_char
:
14801 if (cu
->language
== language_ada
|| cu
->language
== language_m2
14802 || cu
->language
== language_pascal
14803 || cu
->language
== language_fortran
14804 || cu
->language
== language_rust
)
14805 code
= TYPE_CODE_CHAR
;
14806 type_flags
|= TYPE_FLAG_UNSIGNED
;
14809 /* We just treat this as an integer and then recognize the
14810 type by name elsewhere. */
14814 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
14815 dwarf_type_encoding_name (encoding
));
14819 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
14820 TYPE_NAME (type
) = name
;
14821 TYPE_TARGET_TYPE (type
) = target_type
;
14823 if (name
&& strcmp (name
, "char") == 0)
14824 TYPE_NOSIGN (type
) = 1;
14826 return set_die_type (die
, type
, cu
);
14829 /* Parse dwarf attribute if it's a block, reference or constant and put the
14830 resulting value of the attribute into struct bound_prop.
14831 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
14834 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
14835 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
)
14837 struct dwarf2_property_baton
*baton
;
14838 struct obstack
*obstack
= &cu
->objfile
->objfile_obstack
;
14840 if (attr
== NULL
|| prop
== NULL
)
14843 if (attr_form_is_block (attr
))
14845 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
14846 baton
->referenced_type
= NULL
;
14847 baton
->locexpr
.per_cu
= cu
->per_cu
;
14848 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
14849 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
14850 prop
->data
.baton
= baton
;
14851 prop
->kind
= PROP_LOCEXPR
;
14852 gdb_assert (prop
->data
.baton
!= NULL
);
14854 else if (attr_form_is_ref (attr
))
14856 struct dwarf2_cu
*target_cu
= cu
;
14857 struct die_info
*target_die
;
14858 struct attribute
*target_attr
;
14860 target_die
= follow_die_ref (die
, attr
, &target_cu
);
14861 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
14862 if (target_attr
== NULL
)
14863 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
14865 if (target_attr
== NULL
)
14868 switch (target_attr
->name
)
14870 case DW_AT_location
:
14871 if (attr_form_is_section_offset (target_attr
))
14873 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
14874 baton
->referenced_type
= die_type (target_die
, target_cu
);
14875 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
14876 prop
->data
.baton
= baton
;
14877 prop
->kind
= PROP_LOCLIST
;
14878 gdb_assert (prop
->data
.baton
!= NULL
);
14880 else if (attr_form_is_block (target_attr
))
14882 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
14883 baton
->referenced_type
= die_type (target_die
, target_cu
);
14884 baton
->locexpr
.per_cu
= cu
->per_cu
;
14885 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
14886 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
14887 prop
->data
.baton
= baton
;
14888 prop
->kind
= PROP_LOCEXPR
;
14889 gdb_assert (prop
->data
.baton
!= NULL
);
14893 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
14894 "dynamic property");
14898 case DW_AT_data_member_location
:
14902 if (!handle_data_member_location (target_die
, target_cu
,
14906 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
14907 baton
->referenced_type
= read_type_die (target_die
->parent
,
14909 baton
->offset_info
.offset
= offset
;
14910 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
14911 prop
->data
.baton
= baton
;
14912 prop
->kind
= PROP_ADDR_OFFSET
;
14917 else if (attr_form_is_constant (attr
))
14919 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
14920 prop
->kind
= PROP_CONST
;
14924 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
14925 dwarf2_name (die
, cu
));
14932 /* Read the given DW_AT_subrange DIE. */
14934 static struct type
*
14935 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14937 struct type
*base_type
, *orig_base_type
;
14938 struct type
*range_type
;
14939 struct attribute
*attr
;
14940 struct dynamic_prop low
, high
;
14941 int low_default_is_valid
;
14942 int high_bound_is_count
= 0;
14944 LONGEST negative_mask
;
14946 orig_base_type
= die_type (die
, cu
);
14947 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
14948 whereas the real type might be. So, we use ORIG_BASE_TYPE when
14949 creating the range type, but we use the result of check_typedef
14950 when examining properties of the type. */
14951 base_type
= check_typedef (orig_base_type
);
14953 /* The die_type call above may have already set the type for this DIE. */
14954 range_type
= get_die_type (die
, cu
);
14958 low
.kind
= PROP_CONST
;
14959 high
.kind
= PROP_CONST
;
14960 high
.data
.const_val
= 0;
14962 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
14963 omitting DW_AT_lower_bound. */
14964 switch (cu
->language
)
14967 case language_cplus
:
14968 low
.data
.const_val
= 0;
14969 low_default_is_valid
= 1;
14971 case language_fortran
:
14972 low
.data
.const_val
= 1;
14973 low_default_is_valid
= 1;
14976 case language_java
:
14977 case language_objc
:
14978 case language_rust
:
14979 low
.data
.const_val
= 0;
14980 low_default_is_valid
= (cu
->header
.version
>= 4);
14984 case language_pascal
:
14985 low
.data
.const_val
= 1;
14986 low_default_is_valid
= (cu
->header
.version
>= 4);
14989 low
.data
.const_val
= 0;
14990 low_default_is_valid
= 0;
14994 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
14996 attr_to_dynamic_prop (attr
, die
, cu
, &low
);
14997 else if (!low_default_is_valid
)
14998 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
14999 "- DIE at 0x%x [in module %s]"),
15000 die
->offset
.sect_off
, objfile_name (cu
->objfile
));
15002 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
15003 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
))
15005 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
15006 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
))
15008 /* If bounds are constant do the final calculation here. */
15009 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
15010 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
15012 high_bound_is_count
= 1;
15016 /* Dwarf-2 specifications explicitly allows to create subrange types
15017 without specifying a base type.
15018 In that case, the base type must be set to the type of
15019 the lower bound, upper bound or count, in that order, if any of these
15020 three attributes references an object that has a type.
15021 If no base type is found, the Dwarf-2 specifications say that
15022 a signed integer type of size equal to the size of an address should
15024 For the following C code: `extern char gdb_int [];'
15025 GCC produces an empty range DIE.
15026 FIXME: muller/2010-05-28: Possible references to object for low bound,
15027 high bound or count are not yet handled by this code. */
15028 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
15030 struct objfile
*objfile
= cu
->objfile
;
15031 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15032 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
15033 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
15035 /* Test "int", "long int", and "long long int" objfile types,
15036 and select the first one having a size above or equal to the
15037 architecture address size. */
15038 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15039 base_type
= int_type
;
15042 int_type
= objfile_type (objfile
)->builtin_long
;
15043 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15044 base_type
= int_type
;
15047 int_type
= objfile_type (objfile
)->builtin_long_long
;
15048 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15049 base_type
= int_type
;
15054 /* Normally, the DWARF producers are expected to use a signed
15055 constant form (Eg. DW_FORM_sdata) to express negative bounds.
15056 But this is unfortunately not always the case, as witnessed
15057 with GCC, for instance, where the ambiguous DW_FORM_dataN form
15058 is used instead. To work around that ambiguity, we treat
15059 the bounds as signed, and thus sign-extend their values, when
15060 the base type is signed. */
15062 -((LONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
15063 if (low
.kind
== PROP_CONST
15064 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
15065 low
.data
.const_val
|= negative_mask
;
15066 if (high
.kind
== PROP_CONST
15067 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
15068 high
.data
.const_val
|= negative_mask
;
15070 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
);
15072 if (high_bound_is_count
)
15073 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
15075 /* Ada expects an empty array on no boundary attributes. */
15076 if (attr
== NULL
&& cu
->language
!= language_ada
)
15077 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
15079 name
= dwarf2_name (die
, cu
);
15081 TYPE_NAME (range_type
) = name
;
15083 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15085 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
15087 set_die_type (die
, range_type
, cu
);
15089 /* set_die_type should be already done. */
15090 set_descriptive_type (range_type
, die
, cu
);
15095 static struct type
*
15096 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15100 /* For now, we only support the C meaning of an unspecified type: void. */
15102 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
15103 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
15105 return set_die_type (die
, type
, cu
);
15108 /* Read a single die and all its descendents. Set the die's sibling
15109 field to NULL; set other fields in the die correctly, and set all
15110 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
15111 location of the info_ptr after reading all of those dies. PARENT
15112 is the parent of the die in question. */
15114 static struct die_info
*
15115 read_die_and_children (const struct die_reader_specs
*reader
,
15116 const gdb_byte
*info_ptr
,
15117 const gdb_byte
**new_info_ptr
,
15118 struct die_info
*parent
)
15120 struct die_info
*die
;
15121 const gdb_byte
*cur_ptr
;
15124 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
15127 *new_info_ptr
= cur_ptr
;
15130 store_in_ref_table (die
, reader
->cu
);
15133 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
15137 *new_info_ptr
= cur_ptr
;
15140 die
->sibling
= NULL
;
15141 die
->parent
= parent
;
15145 /* Read a die, all of its descendents, and all of its siblings; set
15146 all of the fields of all of the dies correctly. Arguments are as
15147 in read_die_and_children. */
15149 static struct die_info
*
15150 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
15151 const gdb_byte
*info_ptr
,
15152 const gdb_byte
**new_info_ptr
,
15153 struct die_info
*parent
)
15155 struct die_info
*first_die
, *last_sibling
;
15156 const gdb_byte
*cur_ptr
;
15158 cur_ptr
= info_ptr
;
15159 first_die
= last_sibling
= NULL
;
15163 struct die_info
*die
15164 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
15168 *new_info_ptr
= cur_ptr
;
15175 last_sibling
->sibling
= die
;
15177 last_sibling
= die
;
15181 /* Read a die, all of its descendents, and all of its siblings; set
15182 all of the fields of all of the dies correctly. Arguments are as
15183 in read_die_and_children.
15184 This the main entry point for reading a DIE and all its children. */
15186 static struct die_info
*
15187 read_die_and_siblings (const struct die_reader_specs
*reader
,
15188 const gdb_byte
*info_ptr
,
15189 const gdb_byte
**new_info_ptr
,
15190 struct die_info
*parent
)
15192 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
15193 new_info_ptr
, parent
);
15195 if (dwarf_die_debug
)
15197 fprintf_unfiltered (gdb_stdlog
,
15198 "Read die from %s@0x%x of %s:\n",
15199 get_section_name (reader
->die_section
),
15200 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
15201 bfd_get_filename (reader
->abfd
));
15202 dump_die (die
, dwarf_die_debug
);
15208 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
15210 The caller is responsible for filling in the extra attributes
15211 and updating (*DIEP)->num_attrs.
15212 Set DIEP to point to a newly allocated die with its information,
15213 except for its child, sibling, and parent fields.
15214 Set HAS_CHILDREN to tell whether the die has children or not. */
15216 static const gdb_byte
*
15217 read_full_die_1 (const struct die_reader_specs
*reader
,
15218 struct die_info
**diep
, const gdb_byte
*info_ptr
,
15219 int *has_children
, int num_extra_attrs
)
15221 unsigned int abbrev_number
, bytes_read
, i
;
15222 sect_offset offset
;
15223 struct abbrev_info
*abbrev
;
15224 struct die_info
*die
;
15225 struct dwarf2_cu
*cu
= reader
->cu
;
15226 bfd
*abfd
= reader
->abfd
;
15228 offset
.sect_off
= info_ptr
- reader
->buffer
;
15229 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
15230 info_ptr
+= bytes_read
;
15231 if (!abbrev_number
)
15238 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
15240 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
15242 bfd_get_filename (abfd
));
15244 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
15245 die
->offset
= offset
;
15246 die
->tag
= abbrev
->tag
;
15247 die
->abbrev
= abbrev_number
;
15249 /* Make the result usable.
15250 The caller needs to update num_attrs after adding the extra
15252 die
->num_attrs
= abbrev
->num_attrs
;
15254 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
15255 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
15259 *has_children
= abbrev
->has_children
;
15263 /* Read a die and all its attributes.
15264 Set DIEP to point to a newly allocated die with its information,
15265 except for its child, sibling, and parent fields.
15266 Set HAS_CHILDREN to tell whether the die has children or not. */
15268 static const gdb_byte
*
15269 read_full_die (const struct die_reader_specs
*reader
,
15270 struct die_info
**diep
, const gdb_byte
*info_ptr
,
15273 const gdb_byte
*result
;
15275 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
15277 if (dwarf_die_debug
)
15279 fprintf_unfiltered (gdb_stdlog
,
15280 "Read die from %s@0x%x of %s:\n",
15281 get_section_name (reader
->die_section
),
15282 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
15283 bfd_get_filename (reader
->abfd
));
15284 dump_die (*diep
, dwarf_die_debug
);
15290 /* Abbreviation tables.
15292 In DWARF version 2, the description of the debugging information is
15293 stored in a separate .debug_abbrev section. Before we read any
15294 dies from a section we read in all abbreviations and install them
15295 in a hash table. */
15297 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
15299 static struct abbrev_info
*
15300 abbrev_table_alloc_abbrev (struct abbrev_table
*abbrev_table
)
15302 struct abbrev_info
*abbrev
;
15304 abbrev
= XOBNEW (&abbrev_table
->abbrev_obstack
, struct abbrev_info
);
15305 memset (abbrev
, 0, sizeof (struct abbrev_info
));
15310 /* Add an abbreviation to the table. */
15313 abbrev_table_add_abbrev (struct abbrev_table
*abbrev_table
,
15314 unsigned int abbrev_number
,
15315 struct abbrev_info
*abbrev
)
15317 unsigned int hash_number
;
15319 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15320 abbrev
->next
= abbrev_table
->abbrevs
[hash_number
];
15321 abbrev_table
->abbrevs
[hash_number
] = abbrev
;
15324 /* Look up an abbrev in the table.
15325 Returns NULL if the abbrev is not found. */
15327 static struct abbrev_info
*
15328 abbrev_table_lookup_abbrev (const struct abbrev_table
*abbrev_table
,
15329 unsigned int abbrev_number
)
15331 unsigned int hash_number
;
15332 struct abbrev_info
*abbrev
;
15334 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15335 abbrev
= abbrev_table
->abbrevs
[hash_number
];
15339 if (abbrev
->number
== abbrev_number
)
15341 abbrev
= abbrev
->next
;
15346 /* Read in an abbrev table. */
15348 static struct abbrev_table
*
15349 abbrev_table_read_table (struct dwarf2_section_info
*section
,
15350 sect_offset offset
)
15352 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
15353 bfd
*abfd
= get_section_bfd_owner (section
);
15354 struct abbrev_table
*abbrev_table
;
15355 const gdb_byte
*abbrev_ptr
;
15356 struct abbrev_info
*cur_abbrev
;
15357 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
15358 unsigned int abbrev_form
;
15359 struct attr_abbrev
*cur_attrs
;
15360 unsigned int allocated_attrs
;
15362 abbrev_table
= XNEW (struct abbrev_table
);
15363 abbrev_table
->offset
= offset
;
15364 obstack_init (&abbrev_table
->abbrev_obstack
);
15365 abbrev_table
->abbrevs
=
15366 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct abbrev_info
*,
15368 memset (abbrev_table
->abbrevs
, 0,
15369 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
15371 dwarf2_read_section (objfile
, section
);
15372 abbrev_ptr
= section
->buffer
+ offset
.sect_off
;
15373 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15374 abbrev_ptr
+= bytes_read
;
15376 allocated_attrs
= ATTR_ALLOC_CHUNK
;
15377 cur_attrs
= XNEWVEC (struct attr_abbrev
, allocated_attrs
);
15379 /* Loop until we reach an abbrev number of 0. */
15380 while (abbrev_number
)
15382 cur_abbrev
= abbrev_table_alloc_abbrev (abbrev_table
);
15384 /* read in abbrev header */
15385 cur_abbrev
->number
= abbrev_number
;
15387 = (enum dwarf_tag
) read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15388 abbrev_ptr
+= bytes_read
;
15389 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
15392 /* now read in declarations */
15393 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15394 abbrev_ptr
+= bytes_read
;
15395 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15396 abbrev_ptr
+= bytes_read
;
15397 while (abbrev_name
)
15399 if (cur_abbrev
->num_attrs
== allocated_attrs
)
15401 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
15403 = XRESIZEVEC (struct attr_abbrev
, cur_attrs
, allocated_attrs
);
15406 cur_attrs
[cur_abbrev
->num_attrs
].name
15407 = (enum dwarf_attribute
) abbrev_name
;
15408 cur_attrs
[cur_abbrev
->num_attrs
++].form
15409 = (enum dwarf_form
) abbrev_form
;
15410 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15411 abbrev_ptr
+= bytes_read
;
15412 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15413 abbrev_ptr
+= bytes_read
;
15416 cur_abbrev
->attrs
=
15417 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct attr_abbrev
,
15418 cur_abbrev
->num_attrs
);
15419 memcpy (cur_abbrev
->attrs
, cur_attrs
,
15420 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
15422 abbrev_table_add_abbrev (abbrev_table
, abbrev_number
, cur_abbrev
);
15424 /* Get next abbreviation.
15425 Under Irix6 the abbreviations for a compilation unit are not
15426 always properly terminated with an abbrev number of 0.
15427 Exit loop if we encounter an abbreviation which we have
15428 already read (which means we are about to read the abbreviations
15429 for the next compile unit) or if the end of the abbreviation
15430 table is reached. */
15431 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
15433 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15434 abbrev_ptr
+= bytes_read
;
15435 if (abbrev_table_lookup_abbrev (abbrev_table
, abbrev_number
) != NULL
)
15440 return abbrev_table
;
15443 /* Free the resources held by ABBREV_TABLE. */
15446 abbrev_table_free (struct abbrev_table
*abbrev_table
)
15448 obstack_free (&abbrev_table
->abbrev_obstack
, NULL
);
15449 xfree (abbrev_table
);
15452 /* Same as abbrev_table_free but as a cleanup.
15453 We pass in a pointer to the pointer to the table so that we can
15454 set the pointer to NULL when we're done. It also simplifies
15455 build_type_psymtabs_1. */
15458 abbrev_table_free_cleanup (void *table_ptr
)
15460 struct abbrev_table
**abbrev_table_ptr
= (struct abbrev_table
**) table_ptr
;
15462 if (*abbrev_table_ptr
!= NULL
)
15463 abbrev_table_free (*abbrev_table_ptr
);
15464 *abbrev_table_ptr
= NULL
;
15467 /* Read the abbrev table for CU from ABBREV_SECTION. */
15470 dwarf2_read_abbrevs (struct dwarf2_cu
*cu
,
15471 struct dwarf2_section_info
*abbrev_section
)
15474 abbrev_table_read_table (abbrev_section
, cu
->header
.abbrev_offset
);
15477 /* Release the memory used by the abbrev table for a compilation unit. */
15480 dwarf2_free_abbrev_table (void *ptr_to_cu
)
15482 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr_to_cu
;
15484 if (cu
->abbrev_table
!= NULL
)
15485 abbrev_table_free (cu
->abbrev_table
);
15486 /* Set this to NULL so that we SEGV if we try to read it later,
15487 and also because free_comp_unit verifies this is NULL. */
15488 cu
->abbrev_table
= NULL
;
15491 /* Returns nonzero if TAG represents a type that we might generate a partial
15495 is_type_tag_for_partial (int tag
)
15500 /* Some types that would be reasonable to generate partial symbols for,
15501 that we don't at present. */
15502 case DW_TAG_array_type
:
15503 case DW_TAG_file_type
:
15504 case DW_TAG_ptr_to_member_type
:
15505 case DW_TAG_set_type
:
15506 case DW_TAG_string_type
:
15507 case DW_TAG_subroutine_type
:
15509 case DW_TAG_base_type
:
15510 case DW_TAG_class_type
:
15511 case DW_TAG_interface_type
:
15512 case DW_TAG_enumeration_type
:
15513 case DW_TAG_structure_type
:
15514 case DW_TAG_subrange_type
:
15515 case DW_TAG_typedef
:
15516 case DW_TAG_union_type
:
15523 /* Load all DIEs that are interesting for partial symbols into memory. */
15525 static struct partial_die_info
*
15526 load_partial_dies (const struct die_reader_specs
*reader
,
15527 const gdb_byte
*info_ptr
, int building_psymtab
)
15529 struct dwarf2_cu
*cu
= reader
->cu
;
15530 struct objfile
*objfile
= cu
->objfile
;
15531 struct partial_die_info
*part_die
;
15532 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
15533 struct abbrev_info
*abbrev
;
15534 unsigned int bytes_read
;
15535 unsigned int load_all
= 0;
15536 int nesting_level
= 1;
15541 gdb_assert (cu
->per_cu
!= NULL
);
15542 if (cu
->per_cu
->load_all_dies
)
15546 = htab_create_alloc_ex (cu
->header
.length
/ 12,
15550 &cu
->comp_unit_obstack
,
15551 hashtab_obstack_allocate
,
15552 dummy_obstack_deallocate
);
15554 part_die
= XOBNEW (&cu
->comp_unit_obstack
, struct partial_die_info
);
15558 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
15560 /* A NULL abbrev means the end of a series of children. */
15561 if (abbrev
== NULL
)
15563 if (--nesting_level
== 0)
15565 /* PART_DIE was probably the last thing allocated on the
15566 comp_unit_obstack, so we could call obstack_free
15567 here. We don't do that because the waste is small,
15568 and will be cleaned up when we're done with this
15569 compilation unit. This way, we're also more robust
15570 against other users of the comp_unit_obstack. */
15573 info_ptr
+= bytes_read
;
15574 last_die
= parent_die
;
15575 parent_die
= parent_die
->die_parent
;
15579 /* Check for template arguments. We never save these; if
15580 they're seen, we just mark the parent, and go on our way. */
15581 if (parent_die
!= NULL
15582 && cu
->language
== language_cplus
15583 && (abbrev
->tag
== DW_TAG_template_type_param
15584 || abbrev
->tag
== DW_TAG_template_value_param
))
15586 parent_die
->has_template_arguments
= 1;
15590 /* We don't need a partial DIE for the template argument. */
15591 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15596 /* We only recurse into c++ subprograms looking for template arguments.
15597 Skip their other children. */
15599 && cu
->language
== language_cplus
15600 && parent_die
!= NULL
15601 && parent_die
->tag
== DW_TAG_subprogram
)
15603 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15607 /* Check whether this DIE is interesting enough to save. Normally
15608 we would not be interested in members here, but there may be
15609 later variables referencing them via DW_AT_specification (for
15610 static members). */
15612 && !is_type_tag_for_partial (abbrev
->tag
)
15613 && abbrev
->tag
!= DW_TAG_constant
15614 && abbrev
->tag
!= DW_TAG_enumerator
15615 && abbrev
->tag
!= DW_TAG_subprogram
15616 && abbrev
->tag
!= DW_TAG_lexical_block
15617 && abbrev
->tag
!= DW_TAG_variable
15618 && abbrev
->tag
!= DW_TAG_namespace
15619 && abbrev
->tag
!= DW_TAG_module
15620 && abbrev
->tag
!= DW_TAG_member
15621 && abbrev
->tag
!= DW_TAG_imported_unit
15622 && abbrev
->tag
!= DW_TAG_imported_declaration
)
15624 /* Otherwise we skip to the next sibling, if any. */
15625 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15629 info_ptr
= read_partial_die (reader
, part_die
, abbrev
, bytes_read
,
15632 /* This two-pass algorithm for processing partial symbols has a
15633 high cost in cache pressure. Thus, handle some simple cases
15634 here which cover the majority of C partial symbols. DIEs
15635 which neither have specification tags in them, nor could have
15636 specification tags elsewhere pointing at them, can simply be
15637 processed and discarded.
15639 This segment is also optional; scan_partial_symbols and
15640 add_partial_symbol will handle these DIEs if we chain
15641 them in normally. When compilers which do not emit large
15642 quantities of duplicate debug information are more common,
15643 this code can probably be removed. */
15645 /* Any complete simple types at the top level (pretty much all
15646 of them, for a language without namespaces), can be processed
15648 if (parent_die
== NULL
15649 && part_die
->has_specification
== 0
15650 && part_die
->is_declaration
== 0
15651 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
15652 || part_die
->tag
== DW_TAG_base_type
15653 || part_die
->tag
== DW_TAG_subrange_type
))
15655 if (building_psymtab
&& part_die
->name
!= NULL
)
15656 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
15657 VAR_DOMAIN
, LOC_TYPEDEF
,
15658 &objfile
->static_psymbols
,
15659 0, cu
->language
, objfile
);
15660 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
15664 /* The exception for DW_TAG_typedef with has_children above is
15665 a workaround of GCC PR debug/47510. In the case of this complaint
15666 type_name_no_tag_or_error will error on such types later.
15668 GDB skipped children of DW_TAG_typedef by the shortcut above and then
15669 it could not find the child DIEs referenced later, this is checked
15670 above. In correct DWARF DW_TAG_typedef should have no children. */
15672 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
15673 complaint (&symfile_complaints
,
15674 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
15675 "- DIE at 0x%x [in module %s]"),
15676 part_die
->offset
.sect_off
, objfile_name (objfile
));
15678 /* If we're at the second level, and we're an enumerator, and
15679 our parent has no specification (meaning possibly lives in a
15680 namespace elsewhere), then we can add the partial symbol now
15681 instead of queueing it. */
15682 if (part_die
->tag
== DW_TAG_enumerator
15683 && parent_die
!= NULL
15684 && parent_die
->die_parent
== NULL
15685 && parent_die
->tag
== DW_TAG_enumeration_type
15686 && parent_die
->has_specification
== 0)
15688 if (part_die
->name
== NULL
)
15689 complaint (&symfile_complaints
,
15690 _("malformed enumerator DIE ignored"));
15691 else if (building_psymtab
)
15692 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
15693 VAR_DOMAIN
, LOC_CONST
,
15694 (cu
->language
== language_cplus
15695 || cu
->language
== language_java
)
15696 ? &objfile
->global_psymbols
15697 : &objfile
->static_psymbols
,
15698 0, cu
->language
, objfile
);
15700 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
15704 /* We'll save this DIE so link it in. */
15705 part_die
->die_parent
= parent_die
;
15706 part_die
->die_sibling
= NULL
;
15707 part_die
->die_child
= NULL
;
15709 if (last_die
&& last_die
== parent_die
)
15710 last_die
->die_child
= part_die
;
15712 last_die
->die_sibling
= part_die
;
15714 last_die
= part_die
;
15716 if (first_die
== NULL
)
15717 first_die
= part_die
;
15719 /* Maybe add the DIE to the hash table. Not all DIEs that we
15720 find interesting need to be in the hash table, because we
15721 also have the parent/sibling/child chains; only those that we
15722 might refer to by offset later during partial symbol reading.
15724 For now this means things that might have be the target of a
15725 DW_AT_specification, DW_AT_abstract_origin, or
15726 DW_AT_extension. DW_AT_extension will refer only to
15727 namespaces; DW_AT_abstract_origin refers to functions (and
15728 many things under the function DIE, but we do not recurse
15729 into function DIEs during partial symbol reading) and
15730 possibly variables as well; DW_AT_specification refers to
15731 declarations. Declarations ought to have the DW_AT_declaration
15732 flag. It happens that GCC forgets to put it in sometimes, but
15733 only for functions, not for types.
15735 Adding more things than necessary to the hash table is harmless
15736 except for the performance cost. Adding too few will result in
15737 wasted time in find_partial_die, when we reread the compilation
15738 unit with load_all_dies set. */
15741 || abbrev
->tag
== DW_TAG_constant
15742 || abbrev
->tag
== DW_TAG_subprogram
15743 || abbrev
->tag
== DW_TAG_variable
15744 || abbrev
->tag
== DW_TAG_namespace
15745 || part_die
->is_declaration
)
15749 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
15750 part_die
->offset
.sect_off
, INSERT
);
15754 part_die
= XOBNEW (&cu
->comp_unit_obstack
, struct partial_die_info
);
15756 /* For some DIEs we want to follow their children (if any). For C
15757 we have no reason to follow the children of structures; for other
15758 languages we have to, so that we can get at method physnames
15759 to infer fully qualified class names, for DW_AT_specification,
15760 and for C++ template arguments. For C++, we also look one level
15761 inside functions to find template arguments (if the name of the
15762 function does not already contain the template arguments).
15764 For Ada, we need to scan the children of subprograms and lexical
15765 blocks as well because Ada allows the definition of nested
15766 entities that could be interesting for the debugger, such as
15767 nested subprograms for instance. */
15768 if (last_die
->has_children
15770 || last_die
->tag
== DW_TAG_namespace
15771 || last_die
->tag
== DW_TAG_module
15772 || last_die
->tag
== DW_TAG_enumeration_type
15773 || (cu
->language
== language_cplus
15774 && last_die
->tag
== DW_TAG_subprogram
15775 && (last_die
->name
== NULL
15776 || strchr (last_die
->name
, '<') == NULL
))
15777 || (cu
->language
!= language_c
15778 && (last_die
->tag
== DW_TAG_class_type
15779 || last_die
->tag
== DW_TAG_interface_type
15780 || last_die
->tag
== DW_TAG_structure_type
15781 || last_die
->tag
== DW_TAG_union_type
))
15782 || (cu
->language
== language_ada
15783 && (last_die
->tag
== DW_TAG_subprogram
15784 || last_die
->tag
== DW_TAG_lexical_block
))))
15787 parent_die
= last_die
;
15791 /* Otherwise we skip to the next sibling, if any. */
15792 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
15794 /* Back to the top, do it again. */
15798 /* Read a minimal amount of information into the minimal die structure. */
15800 static const gdb_byte
*
15801 read_partial_die (const struct die_reader_specs
*reader
,
15802 struct partial_die_info
*part_die
,
15803 struct abbrev_info
*abbrev
, unsigned int abbrev_len
,
15804 const gdb_byte
*info_ptr
)
15806 struct dwarf2_cu
*cu
= reader
->cu
;
15807 struct objfile
*objfile
= cu
->objfile
;
15808 const gdb_byte
*buffer
= reader
->buffer
;
15810 struct attribute attr
;
15811 int has_low_pc_attr
= 0;
15812 int has_high_pc_attr
= 0;
15813 int high_pc_relative
= 0;
15815 memset (part_die
, 0, sizeof (struct partial_die_info
));
15817 part_die
->offset
.sect_off
= info_ptr
- buffer
;
15819 info_ptr
+= abbrev_len
;
15821 if (abbrev
== NULL
)
15824 part_die
->tag
= abbrev
->tag
;
15825 part_die
->has_children
= abbrev
->has_children
;
15827 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
15829 info_ptr
= read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
15831 /* Store the data if it is of an attribute we want to keep in a
15832 partial symbol table. */
15836 switch (part_die
->tag
)
15838 case DW_TAG_compile_unit
:
15839 case DW_TAG_partial_unit
:
15840 case DW_TAG_type_unit
:
15841 /* Compilation units have a DW_AT_name that is a filename, not
15842 a source language identifier. */
15843 case DW_TAG_enumeration_type
:
15844 case DW_TAG_enumerator
:
15845 /* These tags always have simple identifiers already; no need
15846 to canonicalize them. */
15847 part_die
->name
= DW_STRING (&attr
);
15851 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
15852 &objfile
->per_bfd
->storage_obstack
);
15856 case DW_AT_linkage_name
:
15857 case DW_AT_MIPS_linkage_name
:
15858 /* Note that both forms of linkage name might appear. We
15859 assume they will be the same, and we only store the last
15861 if (cu
->language
== language_ada
)
15862 part_die
->name
= DW_STRING (&attr
);
15863 part_die
->linkage_name
= DW_STRING (&attr
);
15866 has_low_pc_attr
= 1;
15867 part_die
->lowpc
= attr_value_as_address (&attr
);
15869 case DW_AT_high_pc
:
15870 has_high_pc_attr
= 1;
15871 part_die
->highpc
= attr_value_as_address (&attr
);
15872 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
15873 high_pc_relative
= 1;
15875 case DW_AT_location
:
15876 /* Support the .debug_loc offsets. */
15877 if (attr_form_is_block (&attr
))
15879 part_die
->d
.locdesc
= DW_BLOCK (&attr
);
15881 else if (attr_form_is_section_offset (&attr
))
15883 dwarf2_complex_location_expr_complaint ();
15887 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
15888 "partial symbol information");
15891 case DW_AT_external
:
15892 part_die
->is_external
= DW_UNSND (&attr
);
15894 case DW_AT_declaration
:
15895 part_die
->is_declaration
= DW_UNSND (&attr
);
15898 part_die
->has_type
= 1;
15900 case DW_AT_abstract_origin
:
15901 case DW_AT_specification
:
15902 case DW_AT_extension
:
15903 part_die
->has_specification
= 1;
15904 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
15905 part_die
->spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
15906 || cu
->per_cu
->is_dwz
);
15908 case DW_AT_sibling
:
15909 /* Ignore absolute siblings, they might point outside of
15910 the current compile unit. */
15911 if (attr
.form
== DW_FORM_ref_addr
)
15912 complaint (&symfile_complaints
,
15913 _("ignoring absolute DW_AT_sibling"));
15916 unsigned int off
= dwarf2_get_ref_die_offset (&attr
).sect_off
;
15917 const gdb_byte
*sibling_ptr
= buffer
+ off
;
15919 if (sibling_ptr
< info_ptr
)
15920 complaint (&symfile_complaints
,
15921 _("DW_AT_sibling points backwards"));
15922 else if (sibling_ptr
> reader
->buffer_end
)
15923 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
15925 part_die
->sibling
= sibling_ptr
;
15928 case DW_AT_byte_size
:
15929 part_die
->has_byte_size
= 1;
15931 case DW_AT_const_value
:
15932 part_die
->has_const_value
= 1;
15934 case DW_AT_calling_convention
:
15935 /* DWARF doesn't provide a way to identify a program's source-level
15936 entry point. DW_AT_calling_convention attributes are only meant
15937 to describe functions' calling conventions.
15939 However, because it's a necessary piece of information in
15940 Fortran, and because DW_CC_program is the only piece of debugging
15941 information whose definition refers to a 'main program' at all,
15942 several compilers have begun marking Fortran main programs with
15943 DW_CC_program --- even when those functions use the standard
15944 calling conventions.
15946 So until DWARF specifies a way to provide this information and
15947 compilers pick up the new representation, we'll support this
15949 if (DW_UNSND (&attr
) == DW_CC_program
15950 && cu
->language
== language_fortran
15951 && part_die
->name
!= NULL
)
15952 set_objfile_main_name (objfile
, part_die
->name
, language_fortran
);
15955 if (DW_UNSND (&attr
) == DW_INL_inlined
15956 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
15957 part_die
->may_be_inlined
= 1;
15961 if (part_die
->tag
== DW_TAG_imported_unit
)
15963 part_die
->d
.offset
= dwarf2_get_ref_die_offset (&attr
);
15964 part_die
->is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
15965 || cu
->per_cu
->is_dwz
);
15974 if (high_pc_relative
)
15975 part_die
->highpc
+= part_die
->lowpc
;
15977 if (has_low_pc_attr
&& has_high_pc_attr
)
15979 /* When using the GNU linker, .gnu.linkonce. sections are used to
15980 eliminate duplicate copies of functions and vtables and such.
15981 The linker will arbitrarily choose one and discard the others.
15982 The AT_*_pc values for such functions refer to local labels in
15983 these sections. If the section from that file was discarded, the
15984 labels are not in the output, so the relocs get a value of 0.
15985 If this is a discarded function, mark the pc bounds as invalid,
15986 so that GDB will ignore it. */
15987 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
15989 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15991 complaint (&symfile_complaints
,
15992 _("DW_AT_low_pc %s is zero "
15993 "for DIE at 0x%x [in module %s]"),
15994 paddress (gdbarch
, part_die
->lowpc
),
15995 part_die
->offset
.sect_off
, objfile_name (objfile
));
15997 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
15998 else if (part_die
->lowpc
>= part_die
->highpc
)
16000 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
16002 complaint (&symfile_complaints
,
16003 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
16004 "for DIE at 0x%x [in module %s]"),
16005 paddress (gdbarch
, part_die
->lowpc
),
16006 paddress (gdbarch
, part_die
->highpc
),
16007 part_die
->offset
.sect_off
, objfile_name (objfile
));
16010 part_die
->has_pc_info
= 1;
16016 /* Find a cached partial DIE at OFFSET in CU. */
16018 static struct partial_die_info
*
16019 find_partial_die_in_comp_unit (sect_offset offset
, struct dwarf2_cu
*cu
)
16021 struct partial_die_info
*lookup_die
= NULL
;
16022 struct partial_die_info part_die
;
16024 part_die
.offset
= offset
;
16025 lookup_die
= ((struct partial_die_info
*)
16026 htab_find_with_hash (cu
->partial_dies
, &part_die
,
16032 /* Find a partial DIE at OFFSET, which may or may not be in CU,
16033 except in the case of .debug_types DIEs which do not reference
16034 outside their CU (they do however referencing other types via
16035 DW_FORM_ref_sig8). */
16037 static struct partial_die_info
*
16038 find_partial_die (sect_offset offset
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
16040 struct objfile
*objfile
= cu
->objfile
;
16041 struct dwarf2_per_cu_data
*per_cu
= NULL
;
16042 struct partial_die_info
*pd
= NULL
;
16044 if (offset_in_dwz
== cu
->per_cu
->is_dwz
16045 && offset_in_cu_p (&cu
->header
, offset
))
16047 pd
= find_partial_die_in_comp_unit (offset
, cu
);
16050 /* We missed recording what we needed.
16051 Load all dies and try again. */
16052 per_cu
= cu
->per_cu
;
16056 /* TUs don't reference other CUs/TUs (except via type signatures). */
16057 if (cu
->per_cu
->is_debug_types
)
16059 error (_("Dwarf Error: Type Unit at offset 0x%lx contains"
16060 " external reference to offset 0x%lx [in module %s].\n"),
16061 (long) cu
->header
.offset
.sect_off
, (long) offset
.sect_off
,
16062 bfd_get_filename (objfile
->obfd
));
16064 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
16067 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
16068 load_partial_comp_unit (per_cu
);
16070 per_cu
->cu
->last_used
= 0;
16071 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
16074 /* If we didn't find it, and not all dies have been loaded,
16075 load them all and try again. */
16077 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
16079 per_cu
->load_all_dies
= 1;
16081 /* This is nasty. When we reread the DIEs, somewhere up the call chain
16082 THIS_CU->cu may already be in use. So we can't just free it and
16083 replace its DIEs with the ones we read in. Instead, we leave those
16084 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
16085 and clobber THIS_CU->cu->partial_dies with the hash table for the new
16087 load_partial_comp_unit (per_cu
);
16089 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
16093 internal_error (__FILE__
, __LINE__
,
16094 _("could not find partial DIE 0x%x "
16095 "in cache [from module %s]\n"),
16096 offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
16100 /* See if we can figure out if the class lives in a namespace. We do
16101 this by looking for a member function; its demangled name will
16102 contain namespace info, if there is any. */
16105 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
16106 struct dwarf2_cu
*cu
)
16108 /* NOTE: carlton/2003-10-07: Getting the info this way changes
16109 what template types look like, because the demangler
16110 frequently doesn't give the same name as the debug info. We
16111 could fix this by only using the demangled name to get the
16112 prefix (but see comment in read_structure_type). */
16114 struct partial_die_info
*real_pdi
;
16115 struct partial_die_info
*child_pdi
;
16117 /* If this DIE (this DIE's specification, if any) has a parent, then
16118 we should not do this. We'll prepend the parent's fully qualified
16119 name when we create the partial symbol. */
16121 real_pdi
= struct_pdi
;
16122 while (real_pdi
->has_specification
)
16123 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
16124 real_pdi
->spec_is_dwz
, cu
);
16126 if (real_pdi
->die_parent
!= NULL
)
16129 for (child_pdi
= struct_pdi
->die_child
;
16131 child_pdi
= child_pdi
->die_sibling
)
16133 if (child_pdi
->tag
== DW_TAG_subprogram
16134 && child_pdi
->linkage_name
!= NULL
)
16136 char *actual_class_name
16137 = language_class_name_from_physname (cu
->language_defn
,
16138 child_pdi
->linkage_name
);
16139 if (actual_class_name
!= NULL
)
16143 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
16145 strlen (actual_class_name
)));
16146 xfree (actual_class_name
);
16153 /* Adjust PART_DIE before generating a symbol for it. This function
16154 may set the is_external flag or change the DIE's name. */
16157 fixup_partial_die (struct partial_die_info
*part_die
,
16158 struct dwarf2_cu
*cu
)
16160 /* Once we've fixed up a die, there's no point in doing so again.
16161 This also avoids a memory leak if we were to call
16162 guess_partial_die_structure_name multiple times. */
16163 if (part_die
->fixup_called
)
16166 /* If we found a reference attribute and the DIE has no name, try
16167 to find a name in the referred to DIE. */
16169 if (part_die
->name
== NULL
&& part_die
->has_specification
)
16171 struct partial_die_info
*spec_die
;
16173 spec_die
= find_partial_die (part_die
->spec_offset
,
16174 part_die
->spec_is_dwz
, cu
);
16176 fixup_partial_die (spec_die
, cu
);
16178 if (spec_die
->name
)
16180 part_die
->name
= spec_die
->name
;
16182 /* Copy DW_AT_external attribute if it is set. */
16183 if (spec_die
->is_external
)
16184 part_die
->is_external
= spec_die
->is_external
;
16188 /* Set default names for some unnamed DIEs. */
16190 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
16191 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
16193 /* If there is no parent die to provide a namespace, and there are
16194 children, see if we can determine the namespace from their linkage
16196 if (cu
->language
== language_cplus
16197 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
16198 && part_die
->die_parent
== NULL
16199 && part_die
->has_children
16200 && (part_die
->tag
== DW_TAG_class_type
16201 || part_die
->tag
== DW_TAG_structure_type
16202 || part_die
->tag
== DW_TAG_union_type
))
16203 guess_partial_die_structure_name (part_die
, cu
);
16205 /* GCC might emit a nameless struct or union that has a linkage
16206 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
16207 if (part_die
->name
== NULL
16208 && (part_die
->tag
== DW_TAG_class_type
16209 || part_die
->tag
== DW_TAG_interface_type
16210 || part_die
->tag
== DW_TAG_structure_type
16211 || part_die
->tag
== DW_TAG_union_type
)
16212 && part_die
->linkage_name
!= NULL
)
16216 demangled
= gdb_demangle (part_die
->linkage_name
, DMGL_TYPES
);
16221 /* Strip any leading namespaces/classes, keep only the base name.
16222 DW_AT_name for named DIEs does not contain the prefixes. */
16223 base
= strrchr (demangled
, ':');
16224 if (base
&& base
> demangled
&& base
[-1] == ':')
16231 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
16232 base
, strlen (base
)));
16237 part_die
->fixup_called
= 1;
16240 /* Read an attribute value described by an attribute form. */
16242 static const gdb_byte
*
16243 read_attribute_value (const struct die_reader_specs
*reader
,
16244 struct attribute
*attr
, unsigned form
,
16245 const gdb_byte
*info_ptr
)
16247 struct dwarf2_cu
*cu
= reader
->cu
;
16248 struct objfile
*objfile
= cu
->objfile
;
16249 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
16250 bfd
*abfd
= reader
->abfd
;
16251 struct comp_unit_head
*cu_header
= &cu
->header
;
16252 unsigned int bytes_read
;
16253 struct dwarf_block
*blk
;
16255 attr
->form
= (enum dwarf_form
) form
;
16258 case DW_FORM_ref_addr
:
16259 if (cu
->header
.version
== 2)
16260 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
16262 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
16263 &cu
->header
, &bytes_read
);
16264 info_ptr
+= bytes_read
;
16266 case DW_FORM_GNU_ref_alt
:
16267 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
16268 info_ptr
+= bytes_read
;
16271 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
16272 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
16273 info_ptr
+= bytes_read
;
16275 case DW_FORM_block2
:
16276 blk
= dwarf_alloc_block (cu
);
16277 blk
->size
= read_2_bytes (abfd
, info_ptr
);
16279 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16280 info_ptr
+= blk
->size
;
16281 DW_BLOCK (attr
) = blk
;
16283 case DW_FORM_block4
:
16284 blk
= dwarf_alloc_block (cu
);
16285 blk
->size
= read_4_bytes (abfd
, info_ptr
);
16287 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16288 info_ptr
+= blk
->size
;
16289 DW_BLOCK (attr
) = blk
;
16291 case DW_FORM_data2
:
16292 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
16295 case DW_FORM_data4
:
16296 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
16299 case DW_FORM_data8
:
16300 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
16303 case DW_FORM_sec_offset
:
16304 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
16305 info_ptr
+= bytes_read
;
16307 case DW_FORM_string
:
16308 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
16309 DW_STRING_IS_CANONICAL (attr
) = 0;
16310 info_ptr
+= bytes_read
;
16313 if (!cu
->per_cu
->is_dwz
)
16315 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
16317 DW_STRING_IS_CANONICAL (attr
) = 0;
16318 info_ptr
+= bytes_read
;
16322 case DW_FORM_GNU_strp_alt
:
16324 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
16325 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
16328 DW_STRING (attr
) = read_indirect_string_from_dwz (dwz
, str_offset
);
16329 DW_STRING_IS_CANONICAL (attr
) = 0;
16330 info_ptr
+= bytes_read
;
16333 case DW_FORM_exprloc
:
16334 case DW_FORM_block
:
16335 blk
= dwarf_alloc_block (cu
);
16336 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16337 info_ptr
+= bytes_read
;
16338 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16339 info_ptr
+= blk
->size
;
16340 DW_BLOCK (attr
) = blk
;
16342 case DW_FORM_block1
:
16343 blk
= dwarf_alloc_block (cu
);
16344 blk
->size
= read_1_byte (abfd
, info_ptr
);
16346 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16347 info_ptr
+= blk
->size
;
16348 DW_BLOCK (attr
) = blk
;
16350 case DW_FORM_data1
:
16351 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16355 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16358 case DW_FORM_flag_present
:
16359 DW_UNSND (attr
) = 1;
16361 case DW_FORM_sdata
:
16362 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
16363 info_ptr
+= bytes_read
;
16365 case DW_FORM_udata
:
16366 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16367 info_ptr
+= bytes_read
;
16370 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16371 + read_1_byte (abfd
, info_ptr
));
16375 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16376 + read_2_bytes (abfd
, info_ptr
));
16380 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16381 + read_4_bytes (abfd
, info_ptr
));
16385 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16386 + read_8_bytes (abfd
, info_ptr
));
16389 case DW_FORM_ref_sig8
:
16390 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
16393 case DW_FORM_ref_udata
:
16394 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16395 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
16396 info_ptr
+= bytes_read
;
16398 case DW_FORM_indirect
:
16399 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16400 info_ptr
+= bytes_read
;
16401 info_ptr
= read_attribute_value (reader
, attr
, form
, info_ptr
);
16403 case DW_FORM_GNU_addr_index
:
16404 if (reader
->dwo_file
== NULL
)
16406 /* For now flag a hard error.
16407 Later we can turn this into a complaint. */
16408 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16409 dwarf_form_name (form
),
16410 bfd_get_filename (abfd
));
16412 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
16413 info_ptr
+= bytes_read
;
16415 case DW_FORM_GNU_str_index
:
16416 if (reader
->dwo_file
== NULL
)
16418 /* For now flag a hard error.
16419 Later we can turn this into a complaint if warranted. */
16420 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16421 dwarf_form_name (form
),
16422 bfd_get_filename (abfd
));
16425 ULONGEST str_index
=
16426 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16428 DW_STRING (attr
) = read_str_index (reader
, str_index
);
16429 DW_STRING_IS_CANONICAL (attr
) = 0;
16430 info_ptr
+= bytes_read
;
16434 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
16435 dwarf_form_name (form
),
16436 bfd_get_filename (abfd
));
16440 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
16441 attr
->form
= DW_FORM_GNU_ref_alt
;
16443 /* We have seen instances where the compiler tried to emit a byte
16444 size attribute of -1 which ended up being encoded as an unsigned
16445 0xffffffff. Although 0xffffffff is technically a valid size value,
16446 an object of this size seems pretty unlikely so we can relatively
16447 safely treat these cases as if the size attribute was invalid and
16448 treat them as zero by default. */
16449 if (attr
->name
== DW_AT_byte_size
16450 && form
== DW_FORM_data4
16451 && DW_UNSND (attr
) >= 0xffffffff)
16454 (&symfile_complaints
,
16455 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
16456 hex_string (DW_UNSND (attr
)));
16457 DW_UNSND (attr
) = 0;
16463 /* Read an attribute described by an abbreviated attribute. */
16465 static const gdb_byte
*
16466 read_attribute (const struct die_reader_specs
*reader
,
16467 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
16468 const gdb_byte
*info_ptr
)
16470 attr
->name
= abbrev
->name
;
16471 return read_attribute_value (reader
, attr
, abbrev
->form
, info_ptr
);
16474 /* Read dwarf information from a buffer. */
16476 static unsigned int
16477 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
16479 return bfd_get_8 (abfd
, buf
);
16483 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
16485 return bfd_get_signed_8 (abfd
, buf
);
16488 static unsigned int
16489 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16491 return bfd_get_16 (abfd
, buf
);
16495 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16497 return bfd_get_signed_16 (abfd
, buf
);
16500 static unsigned int
16501 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16503 return bfd_get_32 (abfd
, buf
);
16507 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16509 return bfd_get_signed_32 (abfd
, buf
);
16513 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16515 return bfd_get_64 (abfd
, buf
);
16519 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
16520 unsigned int *bytes_read
)
16522 struct comp_unit_head
*cu_header
= &cu
->header
;
16523 CORE_ADDR retval
= 0;
16525 if (cu_header
->signed_addr_p
)
16527 switch (cu_header
->addr_size
)
16530 retval
= bfd_get_signed_16 (abfd
, buf
);
16533 retval
= bfd_get_signed_32 (abfd
, buf
);
16536 retval
= bfd_get_signed_64 (abfd
, buf
);
16539 internal_error (__FILE__
, __LINE__
,
16540 _("read_address: bad switch, signed [in module %s]"),
16541 bfd_get_filename (abfd
));
16546 switch (cu_header
->addr_size
)
16549 retval
= bfd_get_16 (abfd
, buf
);
16552 retval
= bfd_get_32 (abfd
, buf
);
16555 retval
= bfd_get_64 (abfd
, buf
);
16558 internal_error (__FILE__
, __LINE__
,
16559 _("read_address: bad switch, "
16560 "unsigned [in module %s]"),
16561 bfd_get_filename (abfd
));
16565 *bytes_read
= cu_header
->addr_size
;
16569 /* Read the initial length from a section. The (draft) DWARF 3
16570 specification allows the initial length to take up either 4 bytes
16571 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
16572 bytes describe the length and all offsets will be 8 bytes in length
16575 An older, non-standard 64-bit format is also handled by this
16576 function. The older format in question stores the initial length
16577 as an 8-byte quantity without an escape value. Lengths greater
16578 than 2^32 aren't very common which means that the initial 4 bytes
16579 is almost always zero. Since a length value of zero doesn't make
16580 sense for the 32-bit format, this initial zero can be considered to
16581 be an escape value which indicates the presence of the older 64-bit
16582 format. As written, the code can't detect (old format) lengths
16583 greater than 4GB. If it becomes necessary to handle lengths
16584 somewhat larger than 4GB, we could allow other small values (such
16585 as the non-sensical values of 1, 2, and 3) to also be used as
16586 escape values indicating the presence of the old format.
16588 The value returned via bytes_read should be used to increment the
16589 relevant pointer after calling read_initial_length().
16591 [ Note: read_initial_length() and read_offset() are based on the
16592 document entitled "DWARF Debugging Information Format", revision
16593 3, draft 8, dated November 19, 2001. This document was obtained
16596 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
16598 This document is only a draft and is subject to change. (So beware.)
16600 Details regarding the older, non-standard 64-bit format were
16601 determined empirically by examining 64-bit ELF files produced by
16602 the SGI toolchain on an IRIX 6.5 machine.
16604 - Kevin, July 16, 2002
16608 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
16610 LONGEST length
= bfd_get_32 (abfd
, buf
);
16612 if (length
== 0xffffffff)
16614 length
= bfd_get_64 (abfd
, buf
+ 4);
16617 else if (length
== 0)
16619 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
16620 length
= bfd_get_64 (abfd
, buf
);
16631 /* Cover function for read_initial_length.
16632 Returns the length of the object at BUF, and stores the size of the
16633 initial length in *BYTES_READ and stores the size that offsets will be in
16635 If the initial length size is not equivalent to that specified in
16636 CU_HEADER then issue a complaint.
16637 This is useful when reading non-comp-unit headers. */
16640 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
16641 const struct comp_unit_head
*cu_header
,
16642 unsigned int *bytes_read
,
16643 unsigned int *offset_size
)
16645 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
16647 gdb_assert (cu_header
->initial_length_size
== 4
16648 || cu_header
->initial_length_size
== 8
16649 || cu_header
->initial_length_size
== 12);
16651 if (cu_header
->initial_length_size
!= *bytes_read
)
16652 complaint (&symfile_complaints
,
16653 _("intermixed 32-bit and 64-bit DWARF sections"));
16655 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
16659 /* Read an offset from the data stream. The size of the offset is
16660 given by cu_header->offset_size. */
16663 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
16664 const struct comp_unit_head
*cu_header
,
16665 unsigned int *bytes_read
)
16667 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
16669 *bytes_read
= cu_header
->offset_size
;
16673 /* Read an offset from the data stream. */
16676 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
16678 LONGEST retval
= 0;
16680 switch (offset_size
)
16683 retval
= bfd_get_32 (abfd
, buf
);
16686 retval
= bfd_get_64 (abfd
, buf
);
16689 internal_error (__FILE__
, __LINE__
,
16690 _("read_offset_1: bad switch [in module %s]"),
16691 bfd_get_filename (abfd
));
16697 static const gdb_byte
*
16698 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
16700 /* If the size of a host char is 8 bits, we can return a pointer
16701 to the buffer, otherwise we have to copy the data to a buffer
16702 allocated on the temporary obstack. */
16703 gdb_assert (HOST_CHAR_BIT
== 8);
16707 static const char *
16708 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
16709 unsigned int *bytes_read_ptr
)
16711 /* If the size of a host char is 8 bits, we can return a pointer
16712 to the string, otherwise we have to copy the string to a buffer
16713 allocated on the temporary obstack. */
16714 gdb_assert (HOST_CHAR_BIT
== 8);
16717 *bytes_read_ptr
= 1;
16720 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
16721 return (const char *) buf
;
16724 static const char *
16725 read_indirect_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
16727 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
16728 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
16729 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
16730 bfd_get_filename (abfd
));
16731 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
16732 error (_("DW_FORM_strp pointing outside of "
16733 ".debug_str section [in module %s]"),
16734 bfd_get_filename (abfd
));
16735 gdb_assert (HOST_CHAR_BIT
== 8);
16736 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
16738 return (const char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
16741 /* Read a string at offset STR_OFFSET in the .debug_str section from
16742 the .dwz file DWZ. Throw an error if the offset is too large. If
16743 the string consists of a single NUL byte, return NULL; otherwise
16744 return a pointer to the string. */
16746 static const char *
16747 read_indirect_string_from_dwz (struct dwz_file
*dwz
, LONGEST str_offset
)
16749 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwz
->str
);
16751 if (dwz
->str
.buffer
== NULL
)
16752 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
16753 "section [in module %s]"),
16754 bfd_get_filename (dwz
->dwz_bfd
));
16755 if (str_offset
>= dwz
->str
.size
)
16756 error (_("DW_FORM_GNU_strp_alt pointing outside of "
16757 ".debug_str section [in module %s]"),
16758 bfd_get_filename (dwz
->dwz_bfd
));
16759 gdb_assert (HOST_CHAR_BIT
== 8);
16760 if (dwz
->str
.buffer
[str_offset
] == '\0')
16762 return (const char *) (dwz
->str
.buffer
+ str_offset
);
16765 static const char *
16766 read_indirect_string (bfd
*abfd
, const gdb_byte
*buf
,
16767 const struct comp_unit_head
*cu_header
,
16768 unsigned int *bytes_read_ptr
)
16770 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
16772 return read_indirect_string_at_offset (abfd
, str_offset
);
16776 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
16777 unsigned int *bytes_read_ptr
)
16780 unsigned int num_read
;
16782 unsigned char byte
;
16789 byte
= bfd_get_8 (abfd
, buf
);
16792 result
|= ((ULONGEST
) (byte
& 127) << shift
);
16793 if ((byte
& 128) == 0)
16799 *bytes_read_ptr
= num_read
;
16804 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
16805 unsigned int *bytes_read_ptr
)
16808 int shift
, num_read
;
16809 unsigned char byte
;
16816 byte
= bfd_get_8 (abfd
, buf
);
16819 result
|= ((LONGEST
) (byte
& 127) << shift
);
16821 if ((byte
& 128) == 0)
16826 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
16827 result
|= -(((LONGEST
) 1) << shift
);
16828 *bytes_read_ptr
= num_read
;
16832 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
16833 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
16834 ADDR_SIZE is the size of addresses from the CU header. */
16837 read_addr_index_1 (unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
16839 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16840 bfd
*abfd
= objfile
->obfd
;
16841 const gdb_byte
*info_ptr
;
16843 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
16844 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
16845 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
16846 objfile_name (objfile
));
16847 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
16848 error (_("DW_FORM_addr_index pointing outside of "
16849 ".debug_addr section [in module %s]"),
16850 objfile_name (objfile
));
16851 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
16852 + addr_base
+ addr_index
* addr_size
);
16853 if (addr_size
== 4)
16854 return bfd_get_32 (abfd
, info_ptr
);
16856 return bfd_get_64 (abfd
, info_ptr
);
16859 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
16862 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
16864 return read_addr_index_1 (addr_index
, cu
->addr_base
, cu
->header
.addr_size
);
16867 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
16870 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
16871 unsigned int *bytes_read
)
16873 bfd
*abfd
= cu
->objfile
->obfd
;
16874 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
16876 return read_addr_index (cu
, addr_index
);
16879 /* Data structure to pass results from dwarf2_read_addr_index_reader
16880 back to dwarf2_read_addr_index. */
16882 struct dwarf2_read_addr_index_data
16884 ULONGEST addr_base
;
16888 /* die_reader_func for dwarf2_read_addr_index. */
16891 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
16892 const gdb_byte
*info_ptr
,
16893 struct die_info
*comp_unit_die
,
16897 struct dwarf2_cu
*cu
= reader
->cu
;
16898 struct dwarf2_read_addr_index_data
*aidata
=
16899 (struct dwarf2_read_addr_index_data
*) data
;
16901 aidata
->addr_base
= cu
->addr_base
;
16902 aidata
->addr_size
= cu
->header
.addr_size
;
16905 /* Given an index in .debug_addr, fetch the value.
16906 NOTE: This can be called during dwarf expression evaluation,
16907 long after the debug information has been read, and thus per_cu->cu
16908 may no longer exist. */
16911 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
16912 unsigned int addr_index
)
16914 struct objfile
*objfile
= per_cu
->objfile
;
16915 struct dwarf2_cu
*cu
= per_cu
->cu
;
16916 ULONGEST addr_base
;
16919 /* This is intended to be called from outside this file. */
16920 dw2_setup (objfile
);
16922 /* We need addr_base and addr_size.
16923 If we don't have PER_CU->cu, we have to get it.
16924 Nasty, but the alternative is storing the needed info in PER_CU,
16925 which at this point doesn't seem justified: it's not clear how frequently
16926 it would get used and it would increase the size of every PER_CU.
16927 Entry points like dwarf2_per_cu_addr_size do a similar thing
16928 so we're not in uncharted territory here.
16929 Alas we need to be a bit more complicated as addr_base is contained
16932 We don't need to read the entire CU(/TU).
16933 We just need the header and top level die.
16935 IWBN to use the aging mechanism to let us lazily later discard the CU.
16936 For now we skip this optimization. */
16940 addr_base
= cu
->addr_base
;
16941 addr_size
= cu
->header
.addr_size
;
16945 struct dwarf2_read_addr_index_data aidata
;
16947 /* Note: We can't use init_cutu_and_read_dies_simple here,
16948 we need addr_base. */
16949 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
16950 dwarf2_read_addr_index_reader
, &aidata
);
16951 addr_base
= aidata
.addr_base
;
16952 addr_size
= aidata
.addr_size
;
16955 return read_addr_index_1 (addr_index
, addr_base
, addr_size
);
16958 /* Given a DW_FORM_GNU_str_index, fetch the string.
16959 This is only used by the Fission support. */
16961 static const char *
16962 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
16964 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16965 const char *objf_name
= objfile_name (objfile
);
16966 bfd
*abfd
= objfile
->obfd
;
16967 struct dwarf2_cu
*cu
= reader
->cu
;
16968 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
16969 struct dwarf2_section_info
*str_offsets_section
=
16970 &reader
->dwo_file
->sections
.str_offsets
;
16971 const gdb_byte
*info_ptr
;
16972 ULONGEST str_offset
;
16973 static const char form_name
[] = "DW_FORM_GNU_str_index";
16975 dwarf2_read_section (objfile
, str_section
);
16976 dwarf2_read_section (objfile
, str_offsets_section
);
16977 if (str_section
->buffer
== NULL
)
16978 error (_("%s used without .debug_str.dwo section"
16979 " in CU at offset 0x%lx [in module %s]"),
16980 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16981 if (str_offsets_section
->buffer
== NULL
)
16982 error (_("%s used without .debug_str_offsets.dwo section"
16983 " in CU at offset 0x%lx [in module %s]"),
16984 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16985 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
16986 error (_("%s pointing outside of .debug_str_offsets.dwo"
16987 " section in CU at offset 0x%lx [in module %s]"),
16988 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16989 info_ptr
= (str_offsets_section
->buffer
16990 + str_index
* cu
->header
.offset_size
);
16991 if (cu
->header
.offset_size
== 4)
16992 str_offset
= bfd_get_32 (abfd
, info_ptr
);
16994 str_offset
= bfd_get_64 (abfd
, info_ptr
);
16995 if (str_offset
>= str_section
->size
)
16996 error (_("Offset from %s pointing outside of"
16997 " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"),
16998 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16999 return (const char *) (str_section
->buffer
+ str_offset
);
17002 /* Return the length of an LEB128 number in BUF. */
17005 leb128_size (const gdb_byte
*buf
)
17007 const gdb_byte
*begin
= buf
;
17013 if ((byte
& 128) == 0)
17014 return buf
- begin
;
17019 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
17028 cu
->language
= language_c
;
17030 case DW_LANG_C_plus_plus
:
17031 case DW_LANG_C_plus_plus_11
:
17032 case DW_LANG_C_plus_plus_14
:
17033 cu
->language
= language_cplus
;
17036 cu
->language
= language_d
;
17038 case DW_LANG_Fortran77
:
17039 case DW_LANG_Fortran90
:
17040 case DW_LANG_Fortran95
:
17041 case DW_LANG_Fortran03
:
17042 case DW_LANG_Fortran08
:
17043 cu
->language
= language_fortran
;
17046 cu
->language
= language_go
;
17048 case DW_LANG_Mips_Assembler
:
17049 cu
->language
= language_asm
;
17052 cu
->language
= language_java
;
17054 case DW_LANG_Ada83
:
17055 case DW_LANG_Ada95
:
17056 cu
->language
= language_ada
;
17058 case DW_LANG_Modula2
:
17059 cu
->language
= language_m2
;
17061 case DW_LANG_Pascal83
:
17062 cu
->language
= language_pascal
;
17065 cu
->language
= language_objc
;
17068 case DW_LANG_Rust_old
:
17069 cu
->language
= language_rust
;
17071 case DW_LANG_Cobol74
:
17072 case DW_LANG_Cobol85
:
17074 cu
->language
= language_minimal
;
17077 cu
->language_defn
= language_def (cu
->language
);
17080 /* Return the named attribute or NULL if not there. */
17082 static struct attribute
*
17083 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
17088 struct attribute
*spec
= NULL
;
17090 for (i
= 0; i
< die
->num_attrs
; ++i
)
17092 if (die
->attrs
[i
].name
== name
)
17093 return &die
->attrs
[i
];
17094 if (die
->attrs
[i
].name
== DW_AT_specification
17095 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
17096 spec
= &die
->attrs
[i
];
17102 die
= follow_die_ref (die
, spec
, &cu
);
17108 /* Return the named attribute or NULL if not there,
17109 but do not follow DW_AT_specification, etc.
17110 This is for use in contexts where we're reading .debug_types dies.
17111 Following DW_AT_specification, DW_AT_abstract_origin will take us
17112 back up the chain, and we want to go down. */
17114 static struct attribute
*
17115 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
17119 for (i
= 0; i
< die
->num_attrs
; ++i
)
17120 if (die
->attrs
[i
].name
== name
)
17121 return &die
->attrs
[i
];
17126 /* Return the string associated with a string-typed attribute, or NULL if it
17127 is either not found or is of an incorrect type. */
17129 static const char *
17130 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
17132 struct attribute
*attr
;
17133 const char *str
= NULL
;
17135 attr
= dwarf2_attr (die
, name
, cu
);
17139 if (attr
->form
== DW_FORM_strp
|| attr
->form
== DW_FORM_string
17140 || attr
->form
== DW_FORM_GNU_strp_alt
)
17141 str
= DW_STRING (attr
);
17143 complaint (&symfile_complaints
,
17144 _("string type expected for attribute %s for "
17145 "DIE at 0x%x in module %s"),
17146 dwarf_attr_name (name
), die
->offset
.sect_off
,
17147 objfile_name (cu
->objfile
));
17153 /* Return non-zero iff the attribute NAME is defined for the given DIE,
17154 and holds a non-zero value. This function should only be used for
17155 DW_FORM_flag or DW_FORM_flag_present attributes. */
17158 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
17160 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
17162 return (attr
&& DW_UNSND (attr
));
17166 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
17168 /* A DIE is a declaration if it has a DW_AT_declaration attribute
17169 which value is non-zero. However, we have to be careful with
17170 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
17171 (via dwarf2_flag_true_p) follows this attribute. So we may
17172 end up accidently finding a declaration attribute that belongs
17173 to a different DIE referenced by the specification attribute,
17174 even though the given DIE does not have a declaration attribute. */
17175 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
17176 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
17179 /* Return the die giving the specification for DIE, if there is
17180 one. *SPEC_CU is the CU containing DIE on input, and the CU
17181 containing the return value on output. If there is no
17182 specification, but there is an abstract origin, that is
17185 static struct die_info
*
17186 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
17188 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
17191 if (spec_attr
== NULL
)
17192 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
17194 if (spec_attr
== NULL
)
17197 return follow_die_ref (die
, spec_attr
, spec_cu
);
17200 /* Free the line_header structure *LH, and any arrays and strings it
17202 NOTE: This is also used as a "cleanup" function. */
17205 free_line_header (struct line_header
*lh
)
17207 if (lh
->standard_opcode_lengths
)
17208 xfree (lh
->standard_opcode_lengths
);
17210 /* Remember that all the lh->file_names[i].name pointers are
17211 pointers into debug_line_buffer, and don't need to be freed. */
17212 if (lh
->file_names
)
17213 xfree (lh
->file_names
);
17215 /* Similarly for the include directory names. */
17216 if (lh
->include_dirs
)
17217 xfree (lh
->include_dirs
);
17222 /* Stub for free_line_header to match void * callback types. */
17225 free_line_header_voidp (void *arg
)
17227 struct line_header
*lh
= (struct line_header
*) arg
;
17229 free_line_header (lh
);
17232 /* Add an entry to LH's include directory table. */
17235 add_include_dir (struct line_header
*lh
, const char *include_dir
)
17237 if (dwarf_line_debug
>= 2)
17238 fprintf_unfiltered (gdb_stdlog
, "Adding dir %u: %s\n",
17239 lh
->num_include_dirs
+ 1, include_dir
);
17241 /* Grow the array if necessary. */
17242 if (lh
->include_dirs_size
== 0)
17244 lh
->include_dirs_size
= 1; /* for testing */
17245 lh
->include_dirs
= XNEWVEC (const char *, lh
->include_dirs_size
);
17247 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
17249 lh
->include_dirs_size
*= 2;
17250 lh
->include_dirs
= XRESIZEVEC (const char *, lh
->include_dirs
,
17251 lh
->include_dirs_size
);
17254 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
17257 /* Add an entry to LH's file name table. */
17260 add_file_name (struct line_header
*lh
,
17262 unsigned int dir_index
,
17263 unsigned int mod_time
,
17264 unsigned int length
)
17266 struct file_entry
*fe
;
17268 if (dwarf_line_debug
>= 2)
17269 fprintf_unfiltered (gdb_stdlog
, "Adding file %u: %s\n",
17270 lh
->num_file_names
+ 1, name
);
17272 /* Grow the array if necessary. */
17273 if (lh
->file_names_size
== 0)
17275 lh
->file_names_size
= 1; /* for testing */
17276 lh
->file_names
= XNEWVEC (struct file_entry
, lh
->file_names_size
);
17278 else if (lh
->num_file_names
>= lh
->file_names_size
)
17280 lh
->file_names_size
*= 2;
17282 = XRESIZEVEC (struct file_entry
, lh
->file_names
, lh
->file_names_size
);
17285 fe
= &lh
->file_names
[lh
->num_file_names
++];
17287 fe
->dir_index
= dir_index
;
17288 fe
->mod_time
= mod_time
;
17289 fe
->length
= length
;
17290 fe
->included_p
= 0;
17294 /* A convenience function to find the proper .debug_line section for a CU. */
17296 static struct dwarf2_section_info
*
17297 get_debug_line_section (struct dwarf2_cu
*cu
)
17299 struct dwarf2_section_info
*section
;
17301 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
17303 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
17304 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
17305 else if (cu
->per_cu
->is_dwz
)
17307 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
17309 section
= &dwz
->line
;
17312 section
= &dwarf2_per_objfile
->line
;
17317 /* Read the statement program header starting at OFFSET in
17318 .debug_line, or .debug_line.dwo. Return a pointer
17319 to a struct line_header, allocated using xmalloc.
17320 Returns NULL if there is a problem reading the header, e.g., if it
17321 has a version we don't understand.
17323 NOTE: the strings in the include directory and file name tables of
17324 the returned object point into the dwarf line section buffer,
17325 and must not be freed. */
17327 static struct line_header
*
17328 dwarf_decode_line_header (unsigned int offset
, struct dwarf2_cu
*cu
)
17330 struct cleanup
*back_to
;
17331 struct line_header
*lh
;
17332 const gdb_byte
*line_ptr
;
17333 unsigned int bytes_read
, offset_size
;
17335 const char *cur_dir
, *cur_file
;
17336 struct dwarf2_section_info
*section
;
17339 section
= get_debug_line_section (cu
);
17340 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
17341 if (section
->buffer
== NULL
)
17343 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
17344 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
17346 complaint (&symfile_complaints
, _("missing .debug_line section"));
17350 /* We can't do this until we know the section is non-empty.
17351 Only then do we know we have such a section. */
17352 abfd
= get_section_bfd_owner (section
);
17354 /* Make sure that at least there's room for the total_length field.
17355 That could be 12 bytes long, but we're just going to fudge that. */
17356 if (offset
+ 4 >= section
->size
)
17358 dwarf2_statement_list_fits_in_line_number_section_complaint ();
17362 lh
= XNEW (struct line_header
);
17363 memset (lh
, 0, sizeof (*lh
));
17364 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
17367 lh
->offset
.sect_off
= offset
;
17368 lh
->offset_in_dwz
= cu
->per_cu
->is_dwz
;
17370 line_ptr
= section
->buffer
+ offset
;
17372 /* Read in the header. */
17374 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
17375 &bytes_read
, &offset_size
);
17376 line_ptr
+= bytes_read
;
17377 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
17379 dwarf2_statement_list_fits_in_line_number_section_complaint ();
17380 do_cleanups (back_to
);
17383 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
17384 lh
->version
= read_2_bytes (abfd
, line_ptr
);
17386 if (lh
->version
> 4)
17388 /* This is a version we don't understand. The format could have
17389 changed in ways we don't handle properly so just punt. */
17390 complaint (&symfile_complaints
,
17391 _("unsupported version in .debug_line section"));
17394 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
17395 line_ptr
+= offset_size
;
17396 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
17398 if (lh
->version
>= 4)
17400 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
17404 lh
->maximum_ops_per_instruction
= 1;
17406 if (lh
->maximum_ops_per_instruction
== 0)
17408 lh
->maximum_ops_per_instruction
= 1;
17409 complaint (&symfile_complaints
,
17410 _("invalid maximum_ops_per_instruction "
17411 "in `.debug_line' section"));
17414 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
17416 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
17418 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
17420 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
17422 lh
->standard_opcode_lengths
= XNEWVEC (unsigned char, lh
->opcode_base
);
17424 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
17425 for (i
= 1; i
< lh
->opcode_base
; ++i
)
17427 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
17431 /* Read directory table. */
17432 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
17434 line_ptr
+= bytes_read
;
17435 add_include_dir (lh
, cur_dir
);
17437 line_ptr
+= bytes_read
;
17439 /* Read file name table. */
17440 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
17442 unsigned int dir_index
, mod_time
, length
;
17444 line_ptr
+= bytes_read
;
17445 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17446 line_ptr
+= bytes_read
;
17447 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17448 line_ptr
+= bytes_read
;
17449 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17450 line_ptr
+= bytes_read
;
17452 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
17454 line_ptr
+= bytes_read
;
17455 lh
->statement_program_start
= line_ptr
;
17457 if (line_ptr
> (section
->buffer
+ section
->size
))
17458 complaint (&symfile_complaints
,
17459 _("line number info header doesn't "
17460 "fit in `.debug_line' section"));
17462 discard_cleanups (back_to
);
17466 /* Subroutine of dwarf_decode_lines to simplify it.
17467 Return the file name of the psymtab for included file FILE_INDEX
17468 in line header LH of PST.
17469 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
17470 If space for the result is malloc'd, it will be freed by a cleanup.
17471 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename.
17473 The function creates dangling cleanup registration. */
17475 static const char *
17476 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
17477 const struct partial_symtab
*pst
,
17478 const char *comp_dir
)
17480 const struct file_entry fe
= lh
->file_names
[file_index
];
17481 const char *include_name
= fe
.name
;
17482 const char *include_name_to_compare
= include_name
;
17483 const char *dir_name
= NULL
;
17484 const char *pst_filename
;
17485 char *copied_name
= NULL
;
17488 if (fe
.dir_index
&& lh
->include_dirs
!= NULL
)
17489 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
17491 if (!IS_ABSOLUTE_PATH (include_name
)
17492 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
17494 /* Avoid creating a duplicate psymtab for PST.
17495 We do this by comparing INCLUDE_NAME and PST_FILENAME.
17496 Before we do the comparison, however, we need to account
17497 for DIR_NAME and COMP_DIR.
17498 First prepend dir_name (if non-NULL). If we still don't
17499 have an absolute path prepend comp_dir (if non-NULL).
17500 However, the directory we record in the include-file's
17501 psymtab does not contain COMP_DIR (to match the
17502 corresponding symtab(s)).
17507 bash$ gcc -g ./hello.c
17508 include_name = "hello.c"
17510 DW_AT_comp_dir = comp_dir = "/tmp"
17511 DW_AT_name = "./hello.c"
17515 if (dir_name
!= NULL
)
17517 char *tem
= concat (dir_name
, SLASH_STRING
,
17518 include_name
, (char *)NULL
);
17520 make_cleanup (xfree
, tem
);
17521 include_name
= tem
;
17522 include_name_to_compare
= include_name
;
17524 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
17526 char *tem
= concat (comp_dir
, SLASH_STRING
,
17527 include_name
, (char *)NULL
);
17529 make_cleanup (xfree
, tem
);
17530 include_name_to_compare
= tem
;
17534 pst_filename
= pst
->filename
;
17535 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
17537 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
17538 pst_filename
, (char *)NULL
);
17539 pst_filename
= copied_name
;
17542 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
17544 if (copied_name
!= NULL
)
17545 xfree (copied_name
);
17549 return include_name
;
17552 /* State machine to track the state of the line number program. */
17556 /* These are part of the standard DWARF line number state machine. */
17558 unsigned char op_index
;
17563 unsigned int discriminator
;
17565 /* Additional bits of state we need to track. */
17567 /* The last file that we called dwarf2_start_subfile for.
17568 This is only used for TLLs. */
17569 unsigned int last_file
;
17570 /* The last file a line number was recorded for. */
17571 struct subfile
*last_subfile
;
17573 /* The function to call to record a line. */
17574 record_line_ftype
*record_line
;
17576 /* The last line number that was recorded, used to coalesce
17577 consecutive entries for the same line. This can happen, for
17578 example, when discriminators are present. PR 17276. */
17579 unsigned int last_line
;
17580 int line_has_non_zero_discriminator
;
17581 } lnp_state_machine
;
17583 /* There's a lot of static state to pass to dwarf_record_line.
17584 This keeps it all together. */
17589 struct gdbarch
*gdbarch
;
17591 /* The line number header. */
17592 struct line_header
*line_header
;
17594 /* Non-zero if we're recording lines.
17595 Otherwise we're building partial symtabs and are just interested in
17596 finding include files mentioned by the line number program. */
17597 int record_lines_p
;
17598 } lnp_reader_state
;
17600 /* Ignore this record_line request. */
17603 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
17608 /* Return non-zero if we should add LINE to the line number table.
17609 LINE is the line to add, LAST_LINE is the last line that was added,
17610 LAST_SUBFILE is the subfile for LAST_LINE.
17611 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
17612 had a non-zero discriminator.
17614 We have to be careful in the presence of discriminators.
17615 E.g., for this line:
17617 for (i = 0; i < 100000; i++);
17619 clang can emit four line number entries for that one line,
17620 each with a different discriminator.
17621 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
17623 However, we want gdb to coalesce all four entries into one.
17624 Otherwise the user could stepi into the middle of the line and
17625 gdb would get confused about whether the pc really was in the
17626 middle of the line.
17628 Things are further complicated by the fact that two consecutive
17629 line number entries for the same line is a heuristic used by gcc
17630 to denote the end of the prologue. So we can't just discard duplicate
17631 entries, we have to be selective about it. The heuristic we use is
17632 that we only collapse consecutive entries for the same line if at least
17633 one of those entries has a non-zero discriminator. PR 17276.
17635 Note: Addresses in the line number state machine can never go backwards
17636 within one sequence, thus this coalescing is ok. */
17639 dwarf_record_line_p (unsigned int line
, unsigned int last_line
,
17640 int line_has_non_zero_discriminator
,
17641 struct subfile
*last_subfile
)
17643 if (current_subfile
!= last_subfile
)
17645 if (line
!= last_line
)
17647 /* Same line for the same file that we've seen already.
17648 As a last check, for pr 17276, only record the line if the line
17649 has never had a non-zero discriminator. */
17650 if (!line_has_non_zero_discriminator
)
17655 /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS
17656 in the line table of subfile SUBFILE. */
17659 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
17660 unsigned int line
, CORE_ADDR address
,
17661 record_line_ftype p_record_line
)
17663 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
17665 if (dwarf_line_debug
)
17667 fprintf_unfiltered (gdb_stdlog
,
17668 "Recording line %u, file %s, address %s\n",
17669 line
, lbasename (subfile
->name
),
17670 paddress (gdbarch
, address
));
17673 (*p_record_line
) (subfile
, line
, addr
);
17676 /* Subroutine of dwarf_decode_lines_1 to simplify it.
17677 Mark the end of a set of line number records.
17678 The arguments are the same as for dwarf_record_line_1.
17679 If SUBFILE is NULL the request is ignored. */
17682 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
17683 CORE_ADDR address
, record_line_ftype p_record_line
)
17685 if (subfile
== NULL
)
17688 if (dwarf_line_debug
)
17690 fprintf_unfiltered (gdb_stdlog
,
17691 "Finishing current line, file %s, address %s\n",
17692 lbasename (subfile
->name
),
17693 paddress (gdbarch
, address
));
17696 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, p_record_line
);
17699 /* Record the line in STATE.
17700 END_SEQUENCE is non-zero if we're processing the end of a sequence. */
17703 dwarf_record_line (lnp_reader_state
*reader
, lnp_state_machine
*state
,
17706 const struct line_header
*lh
= reader
->line_header
;
17707 unsigned int file
, line
, discriminator
;
17710 file
= state
->file
;
17711 line
= state
->line
;
17712 is_stmt
= state
->is_stmt
;
17713 discriminator
= state
->discriminator
;
17715 if (dwarf_line_debug
)
17717 fprintf_unfiltered (gdb_stdlog
,
17718 "Processing actual line %u: file %u,"
17719 " address %s, is_stmt %u, discrim %u\n",
17721 paddress (reader
->gdbarch
, state
->address
),
17722 is_stmt
, discriminator
);
17725 if (file
== 0 || file
- 1 >= lh
->num_file_names
)
17726 dwarf2_debug_line_missing_file_complaint ();
17727 /* For now we ignore lines not starting on an instruction boundary.
17728 But not when processing end_sequence for compatibility with the
17729 previous version of the code. */
17730 else if (state
->op_index
== 0 || end_sequence
)
17732 lh
->file_names
[file
- 1].included_p
= 1;
17733 if (reader
->record_lines_p
&& is_stmt
)
17735 if (state
->last_subfile
!= current_subfile
|| end_sequence
)
17737 dwarf_finish_line (reader
->gdbarch
, state
->last_subfile
,
17738 state
->address
, state
->record_line
);
17743 if (dwarf_record_line_p (line
, state
->last_line
,
17744 state
->line_has_non_zero_discriminator
,
17745 state
->last_subfile
))
17747 dwarf_record_line_1 (reader
->gdbarch
, current_subfile
,
17748 line
, state
->address
,
17749 state
->record_line
);
17751 state
->last_subfile
= current_subfile
;
17752 state
->last_line
= line
;
17758 /* Initialize STATE for the start of a line number program. */
17761 init_lnp_state_machine (lnp_state_machine
*state
,
17762 const lnp_reader_state
*reader
)
17764 memset (state
, 0, sizeof (*state
));
17766 /* Just starting, there is no "last file". */
17767 state
->last_file
= 0;
17768 state
->last_subfile
= NULL
;
17770 state
->record_line
= record_line
;
17772 state
->last_line
= 0;
17773 state
->line_has_non_zero_discriminator
= 0;
17775 /* Initialize these according to the DWARF spec. */
17776 state
->op_index
= 0;
17779 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
17780 was a line entry for it so that the backend has a chance to adjust it
17781 and also record it in case it needs it. This is currently used by MIPS
17782 code, cf. `mips_adjust_dwarf2_line'. */
17783 state
->address
= gdbarch_adjust_dwarf2_line (reader
->gdbarch
, 0, 0);
17784 state
->is_stmt
= reader
->line_header
->default_is_stmt
;
17785 state
->discriminator
= 0;
17788 /* Check address and if invalid nop-out the rest of the lines in this
17792 check_line_address (struct dwarf2_cu
*cu
, lnp_state_machine
*state
,
17793 const gdb_byte
*line_ptr
,
17794 CORE_ADDR lowpc
, CORE_ADDR address
)
17796 /* If address < lowpc then it's not a usable value, it's outside the
17797 pc range of the CU. However, we restrict the test to only address
17798 values of zero to preserve GDB's previous behaviour which is to
17799 handle the specific case of a function being GC'd by the linker. */
17801 if (address
== 0 && address
< lowpc
)
17803 /* This line table is for a function which has been
17804 GCd by the linker. Ignore it. PR gdb/12528 */
17806 struct objfile
*objfile
= cu
->objfile
;
17807 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
17809 complaint (&symfile_complaints
,
17810 _(".debug_line address at offset 0x%lx is 0 [in module %s]"),
17811 line_offset
, objfile_name (objfile
));
17812 state
->record_line
= noop_record_line
;
17813 /* Note: sm.record_line is left as noop_record_line
17814 until we see DW_LNE_end_sequence. */
17818 /* Subroutine of dwarf_decode_lines to simplify it.
17819 Process the line number information in LH.
17820 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
17821 program in order to set included_p for every referenced header. */
17824 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
17825 const int decode_for_pst_p
, CORE_ADDR lowpc
)
17827 const gdb_byte
*line_ptr
, *extended_end
;
17828 const gdb_byte
*line_end
;
17829 unsigned int bytes_read
, extended_len
;
17830 unsigned char op_code
, extended_op
;
17831 CORE_ADDR baseaddr
;
17832 struct objfile
*objfile
= cu
->objfile
;
17833 bfd
*abfd
= objfile
->obfd
;
17834 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17835 /* Non-zero if we're recording line info (as opposed to building partial
17837 int record_lines_p
= !decode_for_pst_p
;
17838 /* A collection of things we need to pass to dwarf_record_line. */
17839 lnp_reader_state reader_state
;
17841 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
17843 line_ptr
= lh
->statement_program_start
;
17844 line_end
= lh
->statement_program_end
;
17846 reader_state
.gdbarch
= gdbarch
;
17847 reader_state
.line_header
= lh
;
17848 reader_state
.record_lines_p
= record_lines_p
;
17850 /* Read the statement sequences until there's nothing left. */
17851 while (line_ptr
< line_end
)
17853 /* The DWARF line number program state machine. */
17854 lnp_state_machine state_machine
;
17855 int end_sequence
= 0;
17857 /* Reset the state machine at the start of each sequence. */
17858 init_lnp_state_machine (&state_machine
, &reader_state
);
17860 if (record_lines_p
&& lh
->num_file_names
>= state_machine
.file
)
17862 /* Start a subfile for the current file of the state machine. */
17863 /* lh->include_dirs and lh->file_names are 0-based, but the
17864 directory and file name numbers in the statement program
17866 struct file_entry
*fe
= &lh
->file_names
[state_machine
.file
- 1];
17867 const char *dir
= NULL
;
17869 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
17870 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17872 dwarf2_start_subfile (fe
->name
, dir
);
17875 /* Decode the table. */
17876 while (line_ptr
< line_end
&& !end_sequence
)
17878 op_code
= read_1_byte (abfd
, line_ptr
);
17881 if (op_code
>= lh
->opcode_base
)
17883 /* Special opcode. */
17884 unsigned char adj_opcode
;
17885 CORE_ADDR addr_adj
;
17888 adj_opcode
= op_code
- lh
->opcode_base
;
17889 addr_adj
= (((state_machine
.op_index
17890 + (adj_opcode
/ lh
->line_range
))
17891 / lh
->maximum_ops_per_instruction
)
17892 * lh
->minimum_instruction_length
);
17893 state_machine
.address
17894 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17895 state_machine
.op_index
= ((state_machine
.op_index
17896 + (adj_opcode
/ lh
->line_range
))
17897 % lh
->maximum_ops_per_instruction
);
17898 line_delta
= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
17899 state_machine
.line
+= line_delta
;
17900 if (line_delta
!= 0)
17901 state_machine
.line_has_non_zero_discriminator
17902 = state_machine
.discriminator
!= 0;
17904 dwarf_record_line (&reader_state
, &state_machine
, 0);
17905 state_machine
.discriminator
= 0;
17907 else switch (op_code
)
17909 case DW_LNS_extended_op
:
17910 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
17912 line_ptr
+= bytes_read
;
17913 extended_end
= line_ptr
+ extended_len
;
17914 extended_op
= read_1_byte (abfd
, line_ptr
);
17916 switch (extended_op
)
17918 case DW_LNE_end_sequence
:
17919 state_machine
.record_line
= record_line
;
17922 case DW_LNE_set_address
:
17925 = read_address (abfd
, line_ptr
, cu
, &bytes_read
);
17927 line_ptr
+= bytes_read
;
17928 check_line_address (cu
, &state_machine
, line_ptr
,
17930 state_machine
.op_index
= 0;
17931 address
+= baseaddr
;
17932 state_machine
.address
17933 = gdbarch_adjust_dwarf2_line (gdbarch
, address
, 0);
17936 case DW_LNE_define_file
:
17938 const char *cur_file
;
17939 unsigned int dir_index
, mod_time
, length
;
17941 cur_file
= read_direct_string (abfd
, line_ptr
,
17943 line_ptr
+= bytes_read
;
17945 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17946 line_ptr
+= bytes_read
;
17948 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17949 line_ptr
+= bytes_read
;
17951 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17952 line_ptr
+= bytes_read
;
17953 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
17956 case DW_LNE_set_discriminator
:
17957 /* The discriminator is not interesting to the debugger;
17958 just ignore it. We still need to check its value though:
17959 if there are consecutive entries for the same
17960 (non-prologue) line we want to coalesce them.
17962 state_machine
.discriminator
17963 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17964 state_machine
.line_has_non_zero_discriminator
17965 |= state_machine
.discriminator
!= 0;
17966 line_ptr
+= bytes_read
;
17969 complaint (&symfile_complaints
,
17970 _("mangled .debug_line section"));
17973 /* Make sure that we parsed the extended op correctly. If e.g.
17974 we expected a different address size than the producer used,
17975 we may have read the wrong number of bytes. */
17976 if (line_ptr
!= extended_end
)
17978 complaint (&symfile_complaints
,
17979 _("mangled .debug_line section"));
17984 dwarf_record_line (&reader_state
, &state_machine
, 0);
17985 state_machine
.discriminator
= 0;
17987 case DW_LNS_advance_pc
:
17990 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17991 CORE_ADDR addr_adj
;
17993 addr_adj
= (((state_machine
.op_index
+ adjust
)
17994 / lh
->maximum_ops_per_instruction
)
17995 * lh
->minimum_instruction_length
);
17996 state_machine
.address
17997 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17998 state_machine
.op_index
= ((state_machine
.op_index
+ adjust
)
17999 % lh
->maximum_ops_per_instruction
);
18000 line_ptr
+= bytes_read
;
18003 case DW_LNS_advance_line
:
18006 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
18008 state_machine
.line
+= line_delta
;
18009 if (line_delta
!= 0)
18010 state_machine
.line_has_non_zero_discriminator
18011 = state_machine
.discriminator
!= 0;
18012 line_ptr
+= bytes_read
;
18015 case DW_LNS_set_file
:
18017 /* The arrays lh->include_dirs and lh->file_names are
18018 0-based, but the directory and file name numbers in
18019 the statement program are 1-based. */
18020 struct file_entry
*fe
;
18021 const char *dir
= NULL
;
18023 state_machine
.file
= read_unsigned_leb128 (abfd
, line_ptr
,
18025 line_ptr
+= bytes_read
;
18026 if (state_machine
.file
== 0
18027 || state_machine
.file
- 1 >= lh
->num_file_names
)
18028 dwarf2_debug_line_missing_file_complaint ();
18031 fe
= &lh
->file_names
[state_machine
.file
- 1];
18032 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
18033 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
18034 if (record_lines_p
)
18036 state_machine
.last_subfile
= current_subfile
;
18037 state_machine
.line_has_non_zero_discriminator
18038 = state_machine
.discriminator
!= 0;
18039 dwarf2_start_subfile (fe
->name
, dir
);
18044 case DW_LNS_set_column
:
18045 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18046 line_ptr
+= bytes_read
;
18048 case DW_LNS_negate_stmt
:
18049 state_machine
.is_stmt
= (!state_machine
.is_stmt
);
18051 case DW_LNS_set_basic_block
:
18053 /* Add to the address register of the state machine the
18054 address increment value corresponding to special opcode
18055 255. I.e., this value is scaled by the minimum
18056 instruction length since special opcode 255 would have
18057 scaled the increment. */
18058 case DW_LNS_const_add_pc
:
18060 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
18061 CORE_ADDR addr_adj
;
18063 addr_adj
= (((state_machine
.op_index
+ adjust
)
18064 / lh
->maximum_ops_per_instruction
)
18065 * lh
->minimum_instruction_length
);
18066 state_machine
.address
18067 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
18068 state_machine
.op_index
= ((state_machine
.op_index
+ adjust
)
18069 % lh
->maximum_ops_per_instruction
);
18072 case DW_LNS_fixed_advance_pc
:
18074 CORE_ADDR addr_adj
;
18076 addr_adj
= read_2_bytes (abfd
, line_ptr
);
18077 state_machine
.address
18078 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
18079 state_machine
.op_index
= 0;
18085 /* Unknown standard opcode, ignore it. */
18088 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
18090 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18091 line_ptr
+= bytes_read
;
18098 dwarf2_debug_line_missing_end_sequence_complaint ();
18100 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
18101 in which case we still finish recording the last line). */
18102 dwarf_record_line (&reader_state
, &state_machine
, 1);
18106 /* Decode the Line Number Program (LNP) for the given line_header
18107 structure and CU. The actual information extracted and the type
18108 of structures created from the LNP depends on the value of PST.
18110 1. If PST is NULL, then this procedure uses the data from the program
18111 to create all necessary symbol tables, and their linetables.
18113 2. If PST is not NULL, this procedure reads the program to determine
18114 the list of files included by the unit represented by PST, and
18115 builds all the associated partial symbol tables.
18117 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
18118 It is used for relative paths in the line table.
18119 NOTE: When processing partial symtabs (pst != NULL),
18120 comp_dir == pst->dirname.
18122 NOTE: It is important that psymtabs have the same file name (via strcmp)
18123 as the corresponding symtab. Since COMP_DIR is not used in the name of the
18124 symtab we don't use it in the name of the psymtabs we create.
18125 E.g. expand_line_sal requires this when finding psymtabs to expand.
18126 A good testcase for this is mb-inline.exp.
18128 LOWPC is the lowest address in CU (or 0 if not known).
18130 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
18131 for its PC<->lines mapping information. Otherwise only the filename
18132 table is read in. */
18135 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
18136 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
18137 CORE_ADDR lowpc
, int decode_mapping
)
18139 struct objfile
*objfile
= cu
->objfile
;
18140 const int decode_for_pst_p
= (pst
!= NULL
);
18142 if (decode_mapping
)
18143 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
18145 if (decode_for_pst_p
)
18149 /* Now that we're done scanning the Line Header Program, we can
18150 create the psymtab of each included file. */
18151 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
18152 if (lh
->file_names
[file_index
].included_p
== 1)
18154 const char *include_name
=
18155 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
18156 if (include_name
!= NULL
)
18157 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
18162 /* Make sure a symtab is created for every file, even files
18163 which contain only variables (i.e. no code with associated
18165 struct compunit_symtab
*cust
= buildsym_compunit_symtab ();
18168 for (i
= 0; i
< lh
->num_file_names
; i
++)
18170 const char *dir
= NULL
;
18171 struct file_entry
*fe
;
18173 fe
= &lh
->file_names
[i
];
18174 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
18175 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
18176 dwarf2_start_subfile (fe
->name
, dir
);
18178 if (current_subfile
->symtab
== NULL
)
18180 current_subfile
->symtab
18181 = allocate_symtab (cust
, current_subfile
->name
);
18183 fe
->symtab
= current_subfile
->symtab
;
18188 /* Start a subfile for DWARF. FILENAME is the name of the file and
18189 DIRNAME the name of the source directory which contains FILENAME
18190 or NULL if not known.
18191 This routine tries to keep line numbers from identical absolute and
18192 relative file names in a common subfile.
18194 Using the `list' example from the GDB testsuite, which resides in
18195 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
18196 of /srcdir/list0.c yields the following debugging information for list0.c:
18198 DW_AT_name: /srcdir/list0.c
18199 DW_AT_comp_dir: /compdir
18200 files.files[0].name: list0.h
18201 files.files[0].dir: /srcdir
18202 files.files[1].name: list0.c
18203 files.files[1].dir: /srcdir
18205 The line number information for list0.c has to end up in a single
18206 subfile, so that `break /srcdir/list0.c:1' works as expected.
18207 start_subfile will ensure that this happens provided that we pass the
18208 concatenation of files.files[1].dir and files.files[1].name as the
18212 dwarf2_start_subfile (const char *filename
, const char *dirname
)
18216 /* In order not to lose the line information directory,
18217 we concatenate it to the filename when it makes sense.
18218 Note that the Dwarf3 standard says (speaking of filenames in line
18219 information): ``The directory index is ignored for file names
18220 that represent full path names''. Thus ignoring dirname in the
18221 `else' branch below isn't an issue. */
18223 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
18225 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
18229 start_subfile (filename
);
18235 /* Start a symtab for DWARF.
18236 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
18238 static struct compunit_symtab
*
18239 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
18240 const char *name
, const char *comp_dir
, CORE_ADDR low_pc
)
18242 struct compunit_symtab
*cust
18243 = start_symtab (cu
->objfile
, name
, comp_dir
, low_pc
);
18245 record_debugformat ("DWARF 2");
18246 record_producer (cu
->producer
);
18248 /* We assume that we're processing GCC output. */
18249 processing_gcc_compilation
= 2;
18251 cu
->processing_has_namespace_info
= 0;
18257 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
18258 struct dwarf2_cu
*cu
)
18260 struct objfile
*objfile
= cu
->objfile
;
18261 struct comp_unit_head
*cu_header
= &cu
->header
;
18263 /* NOTE drow/2003-01-30: There used to be a comment and some special
18264 code here to turn a symbol with DW_AT_external and a
18265 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
18266 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
18267 with some versions of binutils) where shared libraries could have
18268 relocations against symbols in their debug information - the
18269 minimal symbol would have the right address, but the debug info
18270 would not. It's no longer necessary, because we will explicitly
18271 apply relocations when we read in the debug information now. */
18273 /* A DW_AT_location attribute with no contents indicates that a
18274 variable has been optimized away. */
18275 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
18277 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
18281 /* Handle one degenerate form of location expression specially, to
18282 preserve GDB's previous behavior when section offsets are
18283 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
18284 then mark this symbol as LOC_STATIC. */
18286 if (attr_form_is_block (attr
)
18287 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
18288 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
18289 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
18290 && (DW_BLOCK (attr
)->size
18291 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
18293 unsigned int dummy
;
18295 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
18296 SYMBOL_VALUE_ADDRESS (sym
) =
18297 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
18299 SYMBOL_VALUE_ADDRESS (sym
) =
18300 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
18301 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
18302 fixup_symbol_section (sym
, objfile
);
18303 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
18304 SYMBOL_SECTION (sym
));
18308 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
18309 expression evaluator, and use LOC_COMPUTED only when necessary
18310 (i.e. when the value of a register or memory location is
18311 referenced, or a thread-local block, etc.). Then again, it might
18312 not be worthwhile. I'm assuming that it isn't unless performance
18313 or memory numbers show me otherwise. */
18315 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
18317 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
18318 cu
->has_loclist
= 1;
18321 /* Given a pointer to a DWARF information entry, figure out if we need
18322 to make a symbol table entry for it, and if so, create a new entry
18323 and return a pointer to it.
18324 If TYPE is NULL, determine symbol type from the die, otherwise
18325 used the passed type.
18326 If SPACE is not NULL, use it to hold the new symbol. If it is
18327 NULL, allocate a new symbol on the objfile's obstack. */
18329 static struct symbol
*
18330 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
18331 struct symbol
*space
)
18333 struct objfile
*objfile
= cu
->objfile
;
18334 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18335 struct symbol
*sym
= NULL
;
18337 struct attribute
*attr
= NULL
;
18338 struct attribute
*attr2
= NULL
;
18339 CORE_ADDR baseaddr
;
18340 struct pending
**list_to_add
= NULL
;
18342 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
18344 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
18346 name
= dwarf2_name (die
, cu
);
18349 const char *linkagename
;
18350 int suppress_add
= 0;
18355 sym
= allocate_symbol (objfile
);
18356 OBJSTAT (objfile
, n_syms
++);
18358 /* Cache this symbol's name and the name's demangled form (if any). */
18359 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
18360 linkagename
= dwarf2_physname (name
, die
, cu
);
18361 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
18363 /* Fortran does not have mangling standard and the mangling does differ
18364 between gfortran, iFort etc. */
18365 if (cu
->language
== language_fortran
18366 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
18367 symbol_set_demangled_name (&(sym
->ginfo
),
18368 dwarf2_full_name (name
, die
, cu
),
18371 /* Default assumptions.
18372 Use the passed type or decode it from the die. */
18373 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18374 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
18376 SYMBOL_TYPE (sym
) = type
;
18378 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
18379 attr
= dwarf2_attr (die
,
18380 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
18384 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
18387 attr
= dwarf2_attr (die
,
18388 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
18392 int file_index
= DW_UNSND (attr
);
18394 if (cu
->line_header
== NULL
18395 || file_index
> cu
->line_header
->num_file_names
)
18396 complaint (&symfile_complaints
,
18397 _("file index out of range"));
18398 else if (file_index
> 0)
18400 struct file_entry
*fe
;
18402 fe
= &cu
->line_header
->file_names
[file_index
- 1];
18403 symbol_set_symtab (sym
, fe
->symtab
);
18410 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
18415 addr
= attr_value_as_address (attr
);
18416 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
18417 SYMBOL_VALUE_ADDRESS (sym
) = addr
;
18419 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
18420 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
18421 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
18422 add_symbol_to_list (sym
, cu
->list_in_scope
);
18424 case DW_TAG_subprogram
:
18425 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
18427 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
18428 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18429 if ((attr2
&& (DW_UNSND (attr2
) != 0))
18430 || cu
->language
== language_ada
)
18432 /* Subprograms marked external are stored as a global symbol.
18433 Ada subprograms, whether marked external or not, are always
18434 stored as a global symbol, because we want to be able to
18435 access them globally. For instance, we want to be able
18436 to break on a nested subprogram without having to
18437 specify the context. */
18438 list_to_add
= &global_symbols
;
18442 list_to_add
= cu
->list_in_scope
;
18445 case DW_TAG_inlined_subroutine
:
18446 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
18448 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
18449 SYMBOL_INLINED (sym
) = 1;
18450 list_to_add
= cu
->list_in_scope
;
18452 case DW_TAG_template_value_param
:
18454 /* Fall through. */
18455 case DW_TAG_constant
:
18456 case DW_TAG_variable
:
18457 case DW_TAG_member
:
18458 /* Compilation with minimal debug info may result in
18459 variables with missing type entries. Change the
18460 misleading `void' type to something sensible. */
18461 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
18463 = objfile_type (objfile
)->nodebug_data_symbol
;
18465 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18466 /* In the case of DW_TAG_member, we should only be called for
18467 static const members. */
18468 if (die
->tag
== DW_TAG_member
)
18470 /* dwarf2_add_field uses die_is_declaration,
18471 so we do the same. */
18472 gdb_assert (die_is_declaration (die
, cu
));
18477 dwarf2_const_value (attr
, sym
, cu
);
18478 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18481 if (attr2
&& (DW_UNSND (attr2
) != 0))
18482 list_to_add
= &global_symbols
;
18484 list_to_add
= cu
->list_in_scope
;
18488 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
18491 var_decode_location (attr
, sym
, cu
);
18492 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18494 /* Fortran explicitly imports any global symbols to the local
18495 scope by DW_TAG_common_block. */
18496 if (cu
->language
== language_fortran
&& die
->parent
18497 && die
->parent
->tag
== DW_TAG_common_block
)
18500 if (SYMBOL_CLASS (sym
) == LOC_STATIC
18501 && SYMBOL_VALUE_ADDRESS (sym
) == 0
18502 && !dwarf2_per_objfile
->has_section_at_zero
)
18504 /* When a static variable is eliminated by the linker,
18505 the corresponding debug information is not stripped
18506 out, but the variable address is set to null;
18507 do not add such variables into symbol table. */
18509 else if (attr2
&& (DW_UNSND (attr2
) != 0))
18511 /* Workaround gfortran PR debug/40040 - it uses
18512 DW_AT_location for variables in -fPIC libraries which may
18513 get overriden by other libraries/executable and get
18514 a different address. Resolve it by the minimal symbol
18515 which may come from inferior's executable using copy
18516 relocation. Make this workaround only for gfortran as for
18517 other compilers GDB cannot guess the minimal symbol
18518 Fortran mangling kind. */
18519 if (cu
->language
== language_fortran
&& die
->parent
18520 && die
->parent
->tag
== DW_TAG_module
18522 && startswith (cu
->producer
, "GNU Fortran"))
18523 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
18525 /* A variable with DW_AT_external is never static,
18526 but it may be block-scoped. */
18527 list_to_add
= (cu
->list_in_scope
== &file_symbols
18528 ? &global_symbols
: cu
->list_in_scope
);
18531 list_to_add
= cu
->list_in_scope
;
18535 /* We do not know the address of this symbol.
18536 If it is an external symbol and we have type information
18537 for it, enter the symbol as a LOC_UNRESOLVED symbol.
18538 The address of the variable will then be determined from
18539 the minimal symbol table whenever the variable is
18541 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18543 /* Fortran explicitly imports any global symbols to the local
18544 scope by DW_TAG_common_block. */
18545 if (cu
->language
== language_fortran
&& die
->parent
18546 && die
->parent
->tag
== DW_TAG_common_block
)
18548 /* SYMBOL_CLASS doesn't matter here because
18549 read_common_block is going to reset it. */
18551 list_to_add
= cu
->list_in_scope
;
18553 else if (attr2
&& (DW_UNSND (attr2
) != 0)
18554 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
18556 /* A variable with DW_AT_external is never static, but it
18557 may be block-scoped. */
18558 list_to_add
= (cu
->list_in_scope
== &file_symbols
18559 ? &global_symbols
: cu
->list_in_scope
);
18561 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
18563 else if (!die_is_declaration (die
, cu
))
18565 /* Use the default LOC_OPTIMIZED_OUT class. */
18566 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
18568 list_to_add
= cu
->list_in_scope
;
18572 case DW_TAG_formal_parameter
:
18573 /* If we are inside a function, mark this as an argument. If
18574 not, we might be looking at an argument to an inlined function
18575 when we do not have enough information to show inlined frames;
18576 pretend it's a local variable in that case so that the user can
18578 if (context_stack_depth
> 0
18579 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
18580 SYMBOL_IS_ARGUMENT (sym
) = 1;
18581 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
18584 var_decode_location (attr
, sym
, cu
);
18586 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18589 dwarf2_const_value (attr
, sym
, cu
);
18592 list_to_add
= cu
->list_in_scope
;
18594 case DW_TAG_unspecified_parameters
:
18595 /* From varargs functions; gdb doesn't seem to have any
18596 interest in this information, so just ignore it for now.
18599 case DW_TAG_template_type_param
:
18601 /* Fall through. */
18602 case DW_TAG_class_type
:
18603 case DW_TAG_interface_type
:
18604 case DW_TAG_structure_type
:
18605 case DW_TAG_union_type
:
18606 case DW_TAG_set_type
:
18607 case DW_TAG_enumeration_type
:
18608 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18609 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
18612 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
18613 really ever be static objects: otherwise, if you try
18614 to, say, break of a class's method and you're in a file
18615 which doesn't mention that class, it won't work unless
18616 the check for all static symbols in lookup_symbol_aux
18617 saves you. See the OtherFileClass tests in
18618 gdb.c++/namespace.exp. */
18622 list_to_add
= (cu
->list_in_scope
== &file_symbols
18623 && (cu
->language
== language_cplus
18624 || cu
->language
== language_java
)
18625 ? &global_symbols
: cu
->list_in_scope
);
18627 /* The semantics of C++ state that "struct foo {
18628 ... }" also defines a typedef for "foo". A Java
18629 class declaration also defines a typedef for the
18631 if (cu
->language
== language_cplus
18632 || cu
->language
== language_java
18633 || cu
->language
== language_ada
18634 || cu
->language
== language_d
18635 || cu
->language
== language_rust
)
18637 /* The symbol's name is already allocated along
18638 with this objfile, so we don't need to
18639 duplicate it for the type. */
18640 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
18641 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
18646 case DW_TAG_typedef
:
18647 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18648 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18649 list_to_add
= cu
->list_in_scope
;
18651 case DW_TAG_base_type
:
18652 case DW_TAG_subrange_type
:
18653 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18654 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18655 list_to_add
= cu
->list_in_scope
;
18657 case DW_TAG_enumerator
:
18658 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18661 dwarf2_const_value (attr
, sym
, cu
);
18664 /* NOTE: carlton/2003-11-10: See comment above in the
18665 DW_TAG_class_type, etc. block. */
18667 list_to_add
= (cu
->list_in_scope
== &file_symbols
18668 && (cu
->language
== language_cplus
18669 || cu
->language
== language_java
)
18670 ? &global_symbols
: cu
->list_in_scope
);
18673 case DW_TAG_imported_declaration
:
18674 case DW_TAG_namespace
:
18675 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18676 list_to_add
= &global_symbols
;
18678 case DW_TAG_module
:
18679 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18680 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
18681 list_to_add
= &global_symbols
;
18683 case DW_TAG_common_block
:
18684 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
18685 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
18686 add_symbol_to_list (sym
, cu
->list_in_scope
);
18689 /* Not a tag we recognize. Hopefully we aren't processing
18690 trash data, but since we must specifically ignore things
18691 we don't recognize, there is nothing else we should do at
18693 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
18694 dwarf_tag_name (die
->tag
));
18700 sym
->hash_next
= objfile
->template_symbols
;
18701 objfile
->template_symbols
= sym
;
18702 list_to_add
= NULL
;
18705 if (list_to_add
!= NULL
)
18706 add_symbol_to_list (sym
, list_to_add
);
18708 /* For the benefit of old versions of GCC, check for anonymous
18709 namespaces based on the demangled name. */
18710 if (!cu
->processing_has_namespace_info
18711 && cu
->language
== language_cplus
)
18712 cp_scan_for_anonymous_namespaces (sym
, objfile
);
18717 /* A wrapper for new_symbol_full that always allocates a new symbol. */
18719 static struct symbol
*
18720 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
18722 return new_symbol_full (die
, type
, cu
, NULL
);
18725 /* Given an attr with a DW_FORM_dataN value in host byte order,
18726 zero-extend it as appropriate for the symbol's type. The DWARF
18727 standard (v4) is not entirely clear about the meaning of using
18728 DW_FORM_dataN for a constant with a signed type, where the type is
18729 wider than the data. The conclusion of a discussion on the DWARF
18730 list was that this is unspecified. We choose to always zero-extend
18731 because that is the interpretation long in use by GCC. */
18734 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
18735 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
18737 struct objfile
*objfile
= cu
->objfile
;
18738 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
18739 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
18740 LONGEST l
= DW_UNSND (attr
);
18742 if (bits
< sizeof (*value
) * 8)
18744 l
&= ((LONGEST
) 1 << bits
) - 1;
18747 else if (bits
== sizeof (*value
) * 8)
18751 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
18752 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
18759 /* Read a constant value from an attribute. Either set *VALUE, or if
18760 the value does not fit in *VALUE, set *BYTES - either already
18761 allocated on the objfile obstack, or newly allocated on OBSTACK,
18762 or, set *BATON, if we translated the constant to a location
18766 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
18767 const char *name
, struct obstack
*obstack
,
18768 struct dwarf2_cu
*cu
,
18769 LONGEST
*value
, const gdb_byte
**bytes
,
18770 struct dwarf2_locexpr_baton
**baton
)
18772 struct objfile
*objfile
= cu
->objfile
;
18773 struct comp_unit_head
*cu_header
= &cu
->header
;
18774 struct dwarf_block
*blk
;
18775 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
18776 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
18782 switch (attr
->form
)
18785 case DW_FORM_GNU_addr_index
:
18789 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
18790 dwarf2_const_value_length_mismatch_complaint (name
,
18791 cu_header
->addr_size
,
18792 TYPE_LENGTH (type
));
18793 /* Symbols of this form are reasonably rare, so we just
18794 piggyback on the existing location code rather than writing
18795 a new implementation of symbol_computed_ops. */
18796 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
18797 (*baton
)->per_cu
= cu
->per_cu
;
18798 gdb_assert ((*baton
)->per_cu
);
18800 (*baton
)->size
= 2 + cu_header
->addr_size
;
18801 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
18802 (*baton
)->data
= data
;
18804 data
[0] = DW_OP_addr
;
18805 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
18806 byte_order
, DW_ADDR (attr
));
18807 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
18810 case DW_FORM_string
:
18812 case DW_FORM_GNU_str_index
:
18813 case DW_FORM_GNU_strp_alt
:
18814 /* DW_STRING is already allocated on the objfile obstack, point
18816 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
18818 case DW_FORM_block1
:
18819 case DW_FORM_block2
:
18820 case DW_FORM_block4
:
18821 case DW_FORM_block
:
18822 case DW_FORM_exprloc
:
18823 blk
= DW_BLOCK (attr
);
18824 if (TYPE_LENGTH (type
) != blk
->size
)
18825 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
18826 TYPE_LENGTH (type
));
18827 *bytes
= blk
->data
;
18830 /* The DW_AT_const_value attributes are supposed to carry the
18831 symbol's value "represented as it would be on the target
18832 architecture." By the time we get here, it's already been
18833 converted to host endianness, so we just need to sign- or
18834 zero-extend it as appropriate. */
18835 case DW_FORM_data1
:
18836 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
18838 case DW_FORM_data2
:
18839 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
18841 case DW_FORM_data4
:
18842 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
18844 case DW_FORM_data8
:
18845 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
18848 case DW_FORM_sdata
:
18849 *value
= DW_SND (attr
);
18852 case DW_FORM_udata
:
18853 *value
= DW_UNSND (attr
);
18857 complaint (&symfile_complaints
,
18858 _("unsupported const value attribute form: '%s'"),
18859 dwarf_form_name (attr
->form
));
18866 /* Copy constant value from an attribute to a symbol. */
18869 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
18870 struct dwarf2_cu
*cu
)
18872 struct objfile
*objfile
= cu
->objfile
;
18874 const gdb_byte
*bytes
;
18875 struct dwarf2_locexpr_baton
*baton
;
18877 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
18878 SYMBOL_PRINT_NAME (sym
),
18879 &objfile
->objfile_obstack
, cu
,
18880 &value
, &bytes
, &baton
);
18884 SYMBOL_LOCATION_BATON (sym
) = baton
;
18885 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
18887 else if (bytes
!= NULL
)
18889 SYMBOL_VALUE_BYTES (sym
) = bytes
;
18890 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
18894 SYMBOL_VALUE (sym
) = value
;
18895 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
18899 /* Return the type of the die in question using its DW_AT_type attribute. */
18901 static struct type
*
18902 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18904 struct attribute
*type_attr
;
18906 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
18909 /* A missing DW_AT_type represents a void type. */
18910 return objfile_type (cu
->objfile
)->builtin_void
;
18913 return lookup_die_type (die
, type_attr
, cu
);
18916 /* True iff CU's producer generates GNAT Ada auxiliary information
18917 that allows to find parallel types through that information instead
18918 of having to do expensive parallel lookups by type name. */
18921 need_gnat_info (struct dwarf2_cu
*cu
)
18923 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
18924 of GNAT produces this auxiliary information, without any indication
18925 that it is produced. Part of enhancing the FSF version of GNAT
18926 to produce that information will be to put in place an indicator
18927 that we can use in order to determine whether the descriptive type
18928 info is available or not. One suggestion that has been made is
18929 to use a new attribute, attached to the CU die. For now, assume
18930 that the descriptive type info is not available. */
18934 /* Return the auxiliary type of the die in question using its
18935 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
18936 attribute is not present. */
18938 static struct type
*
18939 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18941 struct attribute
*type_attr
;
18943 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
18947 return lookup_die_type (die
, type_attr
, cu
);
18950 /* If DIE has a descriptive_type attribute, then set the TYPE's
18951 descriptive type accordingly. */
18954 set_descriptive_type (struct type
*type
, struct die_info
*die
,
18955 struct dwarf2_cu
*cu
)
18957 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
18959 if (descriptive_type
)
18961 ALLOCATE_GNAT_AUX_TYPE (type
);
18962 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
18966 /* Return the containing type of the die in question using its
18967 DW_AT_containing_type attribute. */
18969 static struct type
*
18970 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18972 struct attribute
*type_attr
;
18974 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
18976 error (_("Dwarf Error: Problem turning containing type into gdb type "
18977 "[in module %s]"), objfile_name (cu
->objfile
));
18979 return lookup_die_type (die
, type_attr
, cu
);
18982 /* Return an error marker type to use for the ill formed type in DIE/CU. */
18984 static struct type
*
18985 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
18987 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18988 char *message
, *saved
;
18990 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
18991 objfile_name (objfile
),
18992 cu
->header
.offset
.sect_off
,
18993 die
->offset
.sect_off
);
18994 saved
= (char *) obstack_copy0 (&objfile
->objfile_obstack
,
18995 message
, strlen (message
));
18998 return init_type (TYPE_CODE_ERROR
, 0, 0, saved
, objfile
);
19001 /* Look up the type of DIE in CU using its type attribute ATTR.
19002 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
19003 DW_AT_containing_type.
19004 If there is no type substitute an error marker. */
19006 static struct type
*
19007 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
19008 struct dwarf2_cu
*cu
)
19010 struct objfile
*objfile
= cu
->objfile
;
19011 struct type
*this_type
;
19013 gdb_assert (attr
->name
== DW_AT_type
19014 || attr
->name
== DW_AT_GNAT_descriptive_type
19015 || attr
->name
== DW_AT_containing_type
);
19017 /* First see if we have it cached. */
19019 if (attr
->form
== DW_FORM_GNU_ref_alt
)
19021 struct dwarf2_per_cu_data
*per_cu
;
19022 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
19024 per_cu
= dwarf2_find_containing_comp_unit (offset
, 1, cu
->objfile
);
19025 this_type
= get_die_type_at_offset (offset
, per_cu
);
19027 else if (attr_form_is_ref (attr
))
19029 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
19031 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
19033 else if (attr
->form
== DW_FORM_ref_sig8
)
19035 ULONGEST signature
= DW_SIGNATURE (attr
);
19037 return get_signatured_type (die
, signature
, cu
);
19041 complaint (&symfile_complaints
,
19042 _("Dwarf Error: Bad type attribute %s in DIE"
19043 " at 0x%x [in module %s]"),
19044 dwarf_attr_name (attr
->name
), die
->offset
.sect_off
,
19045 objfile_name (objfile
));
19046 return build_error_marker_type (cu
, die
);
19049 /* If not cached we need to read it in. */
19051 if (this_type
== NULL
)
19053 struct die_info
*type_die
= NULL
;
19054 struct dwarf2_cu
*type_cu
= cu
;
19056 if (attr_form_is_ref (attr
))
19057 type_die
= follow_die_ref (die
, attr
, &type_cu
);
19058 if (type_die
== NULL
)
19059 return build_error_marker_type (cu
, die
);
19060 /* If we find the type now, it's probably because the type came
19061 from an inter-CU reference and the type's CU got expanded before
19063 this_type
= read_type_die (type_die
, type_cu
);
19066 /* If we still don't have a type use an error marker. */
19068 if (this_type
== NULL
)
19069 return build_error_marker_type (cu
, die
);
19074 /* Return the type in DIE, CU.
19075 Returns NULL for invalid types.
19077 This first does a lookup in die_type_hash,
19078 and only reads the die in if necessary.
19080 NOTE: This can be called when reading in partial or full symbols. */
19082 static struct type
*
19083 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
19085 struct type
*this_type
;
19087 this_type
= get_die_type (die
, cu
);
19091 return read_type_die_1 (die
, cu
);
19094 /* Read the type in DIE, CU.
19095 Returns NULL for invalid types. */
19097 static struct type
*
19098 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
19100 struct type
*this_type
= NULL
;
19104 case DW_TAG_class_type
:
19105 case DW_TAG_interface_type
:
19106 case DW_TAG_structure_type
:
19107 case DW_TAG_union_type
:
19108 this_type
= read_structure_type (die
, cu
);
19110 case DW_TAG_enumeration_type
:
19111 this_type
= read_enumeration_type (die
, cu
);
19113 case DW_TAG_subprogram
:
19114 case DW_TAG_subroutine_type
:
19115 case DW_TAG_inlined_subroutine
:
19116 this_type
= read_subroutine_type (die
, cu
);
19118 case DW_TAG_array_type
:
19119 this_type
= read_array_type (die
, cu
);
19121 case DW_TAG_set_type
:
19122 this_type
= read_set_type (die
, cu
);
19124 case DW_TAG_pointer_type
:
19125 this_type
= read_tag_pointer_type (die
, cu
);
19127 case DW_TAG_ptr_to_member_type
:
19128 this_type
= read_tag_ptr_to_member_type (die
, cu
);
19130 case DW_TAG_reference_type
:
19131 this_type
= read_tag_reference_type (die
, cu
);
19133 case DW_TAG_const_type
:
19134 this_type
= read_tag_const_type (die
, cu
);
19136 case DW_TAG_volatile_type
:
19137 this_type
= read_tag_volatile_type (die
, cu
);
19139 case DW_TAG_restrict_type
:
19140 this_type
= read_tag_restrict_type (die
, cu
);
19142 case DW_TAG_string_type
:
19143 this_type
= read_tag_string_type (die
, cu
);
19145 case DW_TAG_typedef
:
19146 this_type
= read_typedef (die
, cu
);
19148 case DW_TAG_subrange_type
:
19149 this_type
= read_subrange_type (die
, cu
);
19151 case DW_TAG_base_type
:
19152 this_type
= read_base_type (die
, cu
);
19154 case DW_TAG_unspecified_type
:
19155 this_type
= read_unspecified_type (die
, cu
);
19157 case DW_TAG_namespace
:
19158 this_type
= read_namespace_type (die
, cu
);
19160 case DW_TAG_module
:
19161 this_type
= read_module_type (die
, cu
);
19163 case DW_TAG_atomic_type
:
19164 this_type
= read_tag_atomic_type (die
, cu
);
19167 complaint (&symfile_complaints
,
19168 _("unexpected tag in read_type_die: '%s'"),
19169 dwarf_tag_name (die
->tag
));
19176 /* See if we can figure out if the class lives in a namespace. We do
19177 this by looking for a member function; its demangled name will
19178 contain namespace info, if there is any.
19179 Return the computed name or NULL.
19180 Space for the result is allocated on the objfile's obstack.
19181 This is the full-die version of guess_partial_die_structure_name.
19182 In this case we know DIE has no useful parent. */
19185 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19187 struct die_info
*spec_die
;
19188 struct dwarf2_cu
*spec_cu
;
19189 struct die_info
*child
;
19192 spec_die
= die_specification (die
, &spec_cu
);
19193 if (spec_die
!= NULL
)
19199 for (child
= die
->child
;
19201 child
= child
->sibling
)
19203 if (child
->tag
== DW_TAG_subprogram
)
19205 const char *linkage_name
;
19207 linkage_name
= dwarf2_string_attr (child
, DW_AT_linkage_name
, cu
);
19208 if (linkage_name
== NULL
)
19209 linkage_name
= dwarf2_string_attr (child
, DW_AT_MIPS_linkage_name
,
19211 if (linkage_name
!= NULL
)
19214 = language_class_name_from_physname (cu
->language_defn
,
19218 if (actual_name
!= NULL
)
19220 const char *die_name
= dwarf2_name (die
, cu
);
19222 if (die_name
!= NULL
19223 && strcmp (die_name
, actual_name
) != 0)
19225 /* Strip off the class name from the full name.
19226 We want the prefix. */
19227 int die_name_len
= strlen (die_name
);
19228 int actual_name_len
= strlen (actual_name
);
19230 /* Test for '::' as a sanity check. */
19231 if (actual_name_len
> die_name_len
+ 2
19232 && actual_name
[actual_name_len
19233 - die_name_len
- 1] == ':')
19234 name
= (char *) obstack_copy0 (
19235 &cu
->objfile
->per_bfd
->storage_obstack
,
19236 actual_name
, actual_name_len
- die_name_len
- 2);
19239 xfree (actual_name
);
19248 /* GCC might emit a nameless typedef that has a linkage name. Determine the
19249 prefix part in such case. See
19250 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
19253 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
19255 struct attribute
*attr
;
19258 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
19259 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
19262 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
19265 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
19267 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
19268 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
19271 /* dwarf2_name had to be already called. */
19272 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
19274 /* Strip the base name, keep any leading namespaces/classes. */
19275 base
= strrchr (DW_STRING (attr
), ':');
19276 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
19279 return (char *) obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
19281 &base
[-1] - DW_STRING (attr
));
19284 /* Return the name of the namespace/class that DIE is defined within,
19285 or "" if we can't tell. The caller should not xfree the result.
19287 For example, if we're within the method foo() in the following
19297 then determine_prefix on foo's die will return "N::C". */
19299 static const char *
19300 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
19302 struct die_info
*parent
, *spec_die
;
19303 struct dwarf2_cu
*spec_cu
;
19304 struct type
*parent_type
;
19307 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
19308 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
19309 && cu
->language
!= language_rust
)
19312 retval
= anonymous_struct_prefix (die
, cu
);
19316 /* We have to be careful in the presence of DW_AT_specification.
19317 For example, with GCC 3.4, given the code
19321 // Definition of N::foo.
19325 then we'll have a tree of DIEs like this:
19327 1: DW_TAG_compile_unit
19328 2: DW_TAG_namespace // N
19329 3: DW_TAG_subprogram // declaration of N::foo
19330 4: DW_TAG_subprogram // definition of N::foo
19331 DW_AT_specification // refers to die #3
19333 Thus, when processing die #4, we have to pretend that we're in
19334 the context of its DW_AT_specification, namely the contex of die
19337 spec_die
= die_specification (die
, &spec_cu
);
19338 if (spec_die
== NULL
)
19339 parent
= die
->parent
;
19342 parent
= spec_die
->parent
;
19346 if (parent
== NULL
)
19348 else if (parent
->building_fullname
)
19351 const char *parent_name
;
19353 /* It has been seen on RealView 2.2 built binaries,
19354 DW_TAG_template_type_param types actually _defined_ as
19355 children of the parent class:
19358 template class <class Enum> Class{};
19359 Class<enum E> class_e;
19361 1: DW_TAG_class_type (Class)
19362 2: DW_TAG_enumeration_type (E)
19363 3: DW_TAG_enumerator (enum1:0)
19364 3: DW_TAG_enumerator (enum2:1)
19366 2: DW_TAG_template_type_param
19367 DW_AT_type DW_FORM_ref_udata (E)
19369 Besides being broken debug info, it can put GDB into an
19370 infinite loop. Consider:
19372 When we're building the full name for Class<E>, we'll start
19373 at Class, and go look over its template type parameters,
19374 finding E. We'll then try to build the full name of E, and
19375 reach here. We're now trying to build the full name of E,
19376 and look over the parent DIE for containing scope. In the
19377 broken case, if we followed the parent DIE of E, we'd again
19378 find Class, and once again go look at its template type
19379 arguments, etc., etc. Simply don't consider such parent die
19380 as source-level parent of this die (it can't be, the language
19381 doesn't allow it), and break the loop here. */
19382 name
= dwarf2_name (die
, cu
);
19383 parent_name
= dwarf2_name (parent
, cu
);
19384 complaint (&symfile_complaints
,
19385 _("template param type '%s' defined within parent '%s'"),
19386 name
? name
: "<unknown>",
19387 parent_name
? parent_name
: "<unknown>");
19391 switch (parent
->tag
)
19393 case DW_TAG_namespace
:
19394 parent_type
= read_type_die (parent
, cu
);
19395 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
19396 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
19397 Work around this problem here. */
19398 if (cu
->language
== language_cplus
19399 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
19401 /* We give a name to even anonymous namespaces. */
19402 return TYPE_TAG_NAME (parent_type
);
19403 case DW_TAG_class_type
:
19404 case DW_TAG_interface_type
:
19405 case DW_TAG_structure_type
:
19406 case DW_TAG_union_type
:
19407 case DW_TAG_module
:
19408 parent_type
= read_type_die (parent
, cu
);
19409 if (TYPE_TAG_NAME (parent_type
) != NULL
)
19410 return TYPE_TAG_NAME (parent_type
);
19412 /* An anonymous structure is only allowed non-static data
19413 members; no typedefs, no member functions, et cetera.
19414 So it does not need a prefix. */
19416 case DW_TAG_compile_unit
:
19417 case DW_TAG_partial_unit
:
19418 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
19419 if (cu
->language
== language_cplus
19420 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
19421 && die
->child
!= NULL
19422 && (die
->tag
== DW_TAG_class_type
19423 || die
->tag
== DW_TAG_structure_type
19424 || die
->tag
== DW_TAG_union_type
))
19426 char *name
= guess_full_die_structure_name (die
, cu
);
19431 case DW_TAG_enumeration_type
:
19432 parent_type
= read_type_die (parent
, cu
);
19433 if (TYPE_DECLARED_CLASS (parent_type
))
19435 if (TYPE_TAG_NAME (parent_type
) != NULL
)
19436 return TYPE_TAG_NAME (parent_type
);
19439 /* Fall through. */
19441 return determine_prefix (parent
, cu
);
19445 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
19446 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
19447 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
19448 an obconcat, otherwise allocate storage for the result. The CU argument is
19449 used to determine the language and hence, the appropriate separator. */
19451 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
19454 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
19455 int physname
, struct dwarf2_cu
*cu
)
19457 const char *lead
= "";
19460 if (suffix
== NULL
|| suffix
[0] == '\0'
19461 || prefix
== NULL
|| prefix
[0] == '\0')
19463 else if (cu
->language
== language_java
)
19465 else if (cu
->language
== language_d
)
19467 /* For D, the 'main' function could be defined in any module, but it
19468 should never be prefixed. */
19469 if (strcmp (suffix
, "D main") == 0)
19477 else if (cu
->language
== language_fortran
&& physname
)
19479 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
19480 DW_AT_MIPS_linkage_name is preferred and used instead. */
19488 if (prefix
== NULL
)
19490 if (suffix
== NULL
)
19497 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
19499 strcpy (retval
, lead
);
19500 strcat (retval
, prefix
);
19501 strcat (retval
, sep
);
19502 strcat (retval
, suffix
);
19507 /* We have an obstack. */
19508 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
19512 /* Return sibling of die, NULL if no sibling. */
19514 static struct die_info
*
19515 sibling_die (struct die_info
*die
)
19517 return die
->sibling
;
19520 /* Get name of a die, return NULL if not found. */
19522 static const char *
19523 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
19524 struct obstack
*obstack
)
19526 if (name
&& cu
->language
== language_cplus
)
19528 char *canon_name
= cp_canonicalize_string (name
);
19530 if (canon_name
!= NULL
)
19532 if (strcmp (canon_name
, name
) != 0)
19533 name
= (const char *) obstack_copy0 (obstack
, canon_name
,
19534 strlen (canon_name
));
19535 xfree (canon_name
);
19542 /* Get name of a die, return NULL if not found.
19543 Anonymous namespaces are converted to their magic string. */
19545 static const char *
19546 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19548 struct attribute
*attr
;
19550 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
19551 if ((!attr
|| !DW_STRING (attr
))
19552 && die
->tag
!= DW_TAG_namespace
19553 && die
->tag
!= DW_TAG_class_type
19554 && die
->tag
!= DW_TAG_interface_type
19555 && die
->tag
!= DW_TAG_structure_type
19556 && die
->tag
!= DW_TAG_union_type
)
19561 case DW_TAG_compile_unit
:
19562 case DW_TAG_partial_unit
:
19563 /* Compilation units have a DW_AT_name that is a filename, not
19564 a source language identifier. */
19565 case DW_TAG_enumeration_type
:
19566 case DW_TAG_enumerator
:
19567 /* These tags always have simple identifiers already; no need
19568 to canonicalize them. */
19569 return DW_STRING (attr
);
19571 case DW_TAG_namespace
:
19572 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
19573 return DW_STRING (attr
);
19574 return CP_ANONYMOUS_NAMESPACE_STR
;
19576 case DW_TAG_subprogram
:
19577 /* Java constructors will all be named "<init>", so return
19578 the class name when we see this special case. */
19579 if (cu
->language
== language_java
19580 && DW_STRING (attr
) != NULL
19581 && strcmp (DW_STRING (attr
), "<init>") == 0)
19583 struct dwarf2_cu
*spec_cu
= cu
;
19584 struct die_info
*spec_die
;
19586 /* GCJ will output '<init>' for Java constructor names.
19587 For this special case, return the name of the parent class. */
19589 /* GCJ may output subprogram DIEs with AT_specification set.
19590 If so, use the name of the specified DIE. */
19591 spec_die
= die_specification (die
, &spec_cu
);
19592 if (spec_die
!= NULL
)
19593 return dwarf2_name (spec_die
, spec_cu
);
19598 if (die
->tag
== DW_TAG_class_type
)
19599 return dwarf2_name (die
, cu
);
19601 while (die
->tag
!= DW_TAG_compile_unit
19602 && die
->tag
!= DW_TAG_partial_unit
);
19606 case DW_TAG_class_type
:
19607 case DW_TAG_interface_type
:
19608 case DW_TAG_structure_type
:
19609 case DW_TAG_union_type
:
19610 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
19611 structures or unions. These were of the form "._%d" in GCC 4.1,
19612 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
19613 and GCC 4.4. We work around this problem by ignoring these. */
19614 if (attr
&& DW_STRING (attr
)
19615 && (startswith (DW_STRING (attr
), "._")
19616 || startswith (DW_STRING (attr
), "<anonymous")))
19619 /* GCC might emit a nameless typedef that has a linkage name. See
19620 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
19621 if (!attr
|| DW_STRING (attr
) == NULL
)
19623 char *demangled
= NULL
;
19625 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
19627 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
19629 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
19632 /* Avoid demangling DW_STRING (attr) the second time on a second
19633 call for the same DIE. */
19634 if (!DW_STRING_IS_CANONICAL (attr
))
19635 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
19641 /* FIXME: we already did this for the partial symbol... */
19644 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
19645 demangled
, strlen (demangled
)));
19646 DW_STRING_IS_CANONICAL (attr
) = 1;
19649 /* Strip any leading namespaces/classes, keep only the base name.
19650 DW_AT_name for named DIEs does not contain the prefixes. */
19651 base
= strrchr (DW_STRING (attr
), ':');
19652 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
19655 return DW_STRING (attr
);
19664 if (!DW_STRING_IS_CANONICAL (attr
))
19667 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
19668 &cu
->objfile
->per_bfd
->storage_obstack
);
19669 DW_STRING_IS_CANONICAL (attr
) = 1;
19671 return DW_STRING (attr
);
19674 /* Return the die that this die in an extension of, or NULL if there
19675 is none. *EXT_CU is the CU containing DIE on input, and the CU
19676 containing the return value on output. */
19678 static struct die_info
*
19679 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
19681 struct attribute
*attr
;
19683 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
19687 return follow_die_ref (die
, attr
, ext_cu
);
19690 /* Convert a DIE tag into its string name. */
19692 static const char *
19693 dwarf_tag_name (unsigned tag
)
19695 const char *name
= get_DW_TAG_name (tag
);
19698 return "DW_TAG_<unknown>";
19703 /* Convert a DWARF attribute code into its string name. */
19705 static const char *
19706 dwarf_attr_name (unsigned attr
)
19710 #ifdef MIPS /* collides with DW_AT_HP_block_index */
19711 if (attr
== DW_AT_MIPS_fde
)
19712 return "DW_AT_MIPS_fde";
19714 if (attr
== DW_AT_HP_block_index
)
19715 return "DW_AT_HP_block_index";
19718 name
= get_DW_AT_name (attr
);
19721 return "DW_AT_<unknown>";
19726 /* Convert a DWARF value form code into its string name. */
19728 static const char *
19729 dwarf_form_name (unsigned form
)
19731 const char *name
= get_DW_FORM_name (form
);
19734 return "DW_FORM_<unknown>";
19740 dwarf_bool_name (unsigned mybool
)
19748 /* Convert a DWARF type code into its string name. */
19750 static const char *
19751 dwarf_type_encoding_name (unsigned enc
)
19753 const char *name
= get_DW_ATE_name (enc
);
19756 return "DW_ATE_<unknown>";
19762 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
19766 print_spaces (indent
, f
);
19767 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
19768 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
.sect_off
);
19770 if (die
->parent
!= NULL
)
19772 print_spaces (indent
, f
);
19773 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
19774 die
->parent
->offset
.sect_off
);
19777 print_spaces (indent
, f
);
19778 fprintf_unfiltered (f
, " has children: %s\n",
19779 dwarf_bool_name (die
->child
!= NULL
));
19781 print_spaces (indent
, f
);
19782 fprintf_unfiltered (f
, " attributes:\n");
19784 for (i
= 0; i
< die
->num_attrs
; ++i
)
19786 print_spaces (indent
, f
);
19787 fprintf_unfiltered (f
, " %s (%s) ",
19788 dwarf_attr_name (die
->attrs
[i
].name
),
19789 dwarf_form_name (die
->attrs
[i
].form
));
19791 switch (die
->attrs
[i
].form
)
19794 case DW_FORM_GNU_addr_index
:
19795 fprintf_unfiltered (f
, "address: ");
19796 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
19798 case DW_FORM_block2
:
19799 case DW_FORM_block4
:
19800 case DW_FORM_block
:
19801 case DW_FORM_block1
:
19802 fprintf_unfiltered (f
, "block: size %s",
19803 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
19805 case DW_FORM_exprloc
:
19806 fprintf_unfiltered (f
, "expression: size %s",
19807 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
19809 case DW_FORM_ref_addr
:
19810 fprintf_unfiltered (f
, "ref address: ");
19811 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
19813 case DW_FORM_GNU_ref_alt
:
19814 fprintf_unfiltered (f
, "alt ref address: ");
19815 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
19821 case DW_FORM_ref_udata
:
19822 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
19823 (long) (DW_UNSND (&die
->attrs
[i
])));
19825 case DW_FORM_data1
:
19826 case DW_FORM_data2
:
19827 case DW_FORM_data4
:
19828 case DW_FORM_data8
:
19829 case DW_FORM_udata
:
19830 case DW_FORM_sdata
:
19831 fprintf_unfiltered (f
, "constant: %s",
19832 pulongest (DW_UNSND (&die
->attrs
[i
])));
19834 case DW_FORM_sec_offset
:
19835 fprintf_unfiltered (f
, "section offset: %s",
19836 pulongest (DW_UNSND (&die
->attrs
[i
])));
19838 case DW_FORM_ref_sig8
:
19839 fprintf_unfiltered (f
, "signature: %s",
19840 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
19842 case DW_FORM_string
:
19844 case DW_FORM_GNU_str_index
:
19845 case DW_FORM_GNU_strp_alt
:
19846 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
19847 DW_STRING (&die
->attrs
[i
])
19848 ? DW_STRING (&die
->attrs
[i
]) : "",
19849 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
19852 if (DW_UNSND (&die
->attrs
[i
]))
19853 fprintf_unfiltered (f
, "flag: TRUE");
19855 fprintf_unfiltered (f
, "flag: FALSE");
19857 case DW_FORM_flag_present
:
19858 fprintf_unfiltered (f
, "flag: TRUE");
19860 case DW_FORM_indirect
:
19861 /* The reader will have reduced the indirect form to
19862 the "base form" so this form should not occur. */
19863 fprintf_unfiltered (f
,
19864 "unexpected attribute form: DW_FORM_indirect");
19867 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
19868 die
->attrs
[i
].form
);
19871 fprintf_unfiltered (f
, "\n");
19876 dump_die_for_error (struct die_info
*die
)
19878 dump_die_shallow (gdb_stderr
, 0, die
);
19882 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
19884 int indent
= level
* 4;
19886 gdb_assert (die
!= NULL
);
19888 if (level
>= max_level
)
19891 dump_die_shallow (f
, indent
, die
);
19893 if (die
->child
!= NULL
)
19895 print_spaces (indent
, f
);
19896 fprintf_unfiltered (f
, " Children:");
19897 if (level
+ 1 < max_level
)
19899 fprintf_unfiltered (f
, "\n");
19900 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
19904 fprintf_unfiltered (f
,
19905 " [not printed, max nesting level reached]\n");
19909 if (die
->sibling
!= NULL
&& level
> 0)
19911 dump_die_1 (f
, level
, max_level
, die
->sibling
);
19915 /* This is called from the pdie macro in gdbinit.in.
19916 It's not static so gcc will keep a copy callable from gdb. */
19919 dump_die (struct die_info
*die
, int max_level
)
19921 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
19925 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
19929 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
.sect_off
,
19935 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
19939 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
19941 sect_offset retval
= { DW_UNSND (attr
) };
19943 if (attr_form_is_ref (attr
))
19946 retval
.sect_off
= 0;
19947 complaint (&symfile_complaints
,
19948 _("unsupported die ref attribute form: '%s'"),
19949 dwarf_form_name (attr
->form
));
19953 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
19954 * the value held by the attribute is not constant. */
19957 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
19959 if (attr
->form
== DW_FORM_sdata
)
19960 return DW_SND (attr
);
19961 else if (attr
->form
== DW_FORM_udata
19962 || attr
->form
== DW_FORM_data1
19963 || attr
->form
== DW_FORM_data2
19964 || attr
->form
== DW_FORM_data4
19965 || attr
->form
== DW_FORM_data8
)
19966 return DW_UNSND (attr
);
19969 complaint (&symfile_complaints
,
19970 _("Attribute value is not a constant (%s)"),
19971 dwarf_form_name (attr
->form
));
19972 return default_value
;
19976 /* Follow reference or signature attribute ATTR of SRC_DIE.
19977 On entry *REF_CU is the CU of SRC_DIE.
19978 On exit *REF_CU is the CU of the result. */
19980 static struct die_info
*
19981 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
19982 struct dwarf2_cu
**ref_cu
)
19984 struct die_info
*die
;
19986 if (attr_form_is_ref (attr
))
19987 die
= follow_die_ref (src_die
, attr
, ref_cu
);
19988 else if (attr
->form
== DW_FORM_ref_sig8
)
19989 die
= follow_die_sig (src_die
, attr
, ref_cu
);
19992 dump_die_for_error (src_die
);
19993 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
19994 objfile_name ((*ref_cu
)->objfile
));
20000 /* Follow reference OFFSET.
20001 On entry *REF_CU is the CU of the source die referencing OFFSET.
20002 On exit *REF_CU is the CU of the result.
20003 Returns NULL if OFFSET is invalid. */
20005 static struct die_info
*
20006 follow_die_offset (sect_offset offset
, int offset_in_dwz
,
20007 struct dwarf2_cu
**ref_cu
)
20009 struct die_info temp_die
;
20010 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
20012 gdb_assert (cu
->per_cu
!= NULL
);
20016 if (cu
->per_cu
->is_debug_types
)
20018 /* .debug_types CUs cannot reference anything outside their CU.
20019 If they need to, they have to reference a signatured type via
20020 DW_FORM_ref_sig8. */
20021 if (! offset_in_cu_p (&cu
->header
, offset
))
20024 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
20025 || ! offset_in_cu_p (&cu
->header
, offset
))
20027 struct dwarf2_per_cu_data
*per_cu
;
20029 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
20032 /* If necessary, add it to the queue and load its DIEs. */
20033 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
20034 load_full_comp_unit (per_cu
, cu
->language
);
20036 target_cu
= per_cu
->cu
;
20038 else if (cu
->dies
== NULL
)
20040 /* We're loading full DIEs during partial symbol reading. */
20041 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
20042 load_full_comp_unit (cu
->per_cu
, language_minimal
);
20045 *ref_cu
= target_cu
;
20046 temp_die
.offset
= offset
;
20047 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
20048 &temp_die
, offset
.sect_off
);
20051 /* Follow reference attribute ATTR of SRC_DIE.
20052 On entry *REF_CU is the CU of SRC_DIE.
20053 On exit *REF_CU is the CU of the result. */
20055 static struct die_info
*
20056 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
20057 struct dwarf2_cu
**ref_cu
)
20059 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
20060 struct dwarf2_cu
*cu
= *ref_cu
;
20061 struct die_info
*die
;
20063 die
= follow_die_offset (offset
,
20064 (attr
->form
== DW_FORM_GNU_ref_alt
20065 || cu
->per_cu
->is_dwz
),
20068 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
20069 "at 0x%x [in module %s]"),
20070 offset
.sect_off
, src_die
->offset
.sect_off
,
20071 objfile_name (cu
->objfile
));
20076 /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU.
20077 Returned value is intended for DW_OP_call*. Returned
20078 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
20080 struct dwarf2_locexpr_baton
20081 dwarf2_fetch_die_loc_sect_off (sect_offset offset
,
20082 struct dwarf2_per_cu_data
*per_cu
,
20083 CORE_ADDR (*get_frame_pc
) (void *baton
),
20086 struct dwarf2_cu
*cu
;
20087 struct die_info
*die
;
20088 struct attribute
*attr
;
20089 struct dwarf2_locexpr_baton retval
;
20091 dw2_setup (per_cu
->objfile
);
20093 if (per_cu
->cu
== NULL
)
20098 /* We shouldn't get here for a dummy CU, but don't crash on the user.
20099 Instead just throw an error, not much else we can do. */
20100 error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"),
20101 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20104 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
20106 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
20107 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20109 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
20112 /* DWARF: "If there is no such attribute, then there is no effect.".
20113 DATA is ignored if SIZE is 0. */
20115 retval
.data
= NULL
;
20118 else if (attr_form_is_section_offset (attr
))
20120 struct dwarf2_loclist_baton loclist_baton
;
20121 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
20124 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
20126 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
20128 retval
.size
= size
;
20132 if (!attr_form_is_block (attr
))
20133 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
20134 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
20135 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20137 retval
.data
= DW_BLOCK (attr
)->data
;
20138 retval
.size
= DW_BLOCK (attr
)->size
;
20140 retval
.per_cu
= cu
->per_cu
;
20142 age_cached_comp_units ();
20147 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
20150 struct dwarf2_locexpr_baton
20151 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
20152 struct dwarf2_per_cu_data
*per_cu
,
20153 CORE_ADDR (*get_frame_pc
) (void *baton
),
20156 sect_offset offset
= { per_cu
->offset
.sect_off
+ offset_in_cu
.cu_off
};
20158 return dwarf2_fetch_die_loc_sect_off (offset
, per_cu
, get_frame_pc
, baton
);
20161 /* Write a constant of a given type as target-ordered bytes into
20164 static const gdb_byte
*
20165 write_constant_as_bytes (struct obstack
*obstack
,
20166 enum bfd_endian byte_order
,
20173 *len
= TYPE_LENGTH (type
);
20174 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
20175 store_unsigned_integer (result
, *len
, byte_order
, value
);
20180 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
20181 pointer to the constant bytes and set LEN to the length of the
20182 data. If memory is needed, allocate it on OBSTACK. If the DIE
20183 does not have a DW_AT_const_value, return NULL. */
20186 dwarf2_fetch_constant_bytes (sect_offset offset
,
20187 struct dwarf2_per_cu_data
*per_cu
,
20188 struct obstack
*obstack
,
20191 struct dwarf2_cu
*cu
;
20192 struct die_info
*die
;
20193 struct attribute
*attr
;
20194 const gdb_byte
*result
= NULL
;
20197 enum bfd_endian byte_order
;
20199 dw2_setup (per_cu
->objfile
);
20201 if (per_cu
->cu
== NULL
)
20206 /* We shouldn't get here for a dummy CU, but don't crash on the user.
20207 Instead just throw an error, not much else we can do. */
20208 error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"),
20209 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20212 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
20214 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
20215 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20218 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20222 byte_order
= (bfd_big_endian (per_cu
->objfile
->obfd
)
20223 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
20225 switch (attr
->form
)
20228 case DW_FORM_GNU_addr_index
:
20232 *len
= cu
->header
.addr_size
;
20233 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
20234 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
20238 case DW_FORM_string
:
20240 case DW_FORM_GNU_str_index
:
20241 case DW_FORM_GNU_strp_alt
:
20242 /* DW_STRING is already allocated on the objfile obstack, point
20244 result
= (const gdb_byte
*) DW_STRING (attr
);
20245 *len
= strlen (DW_STRING (attr
));
20247 case DW_FORM_block1
:
20248 case DW_FORM_block2
:
20249 case DW_FORM_block4
:
20250 case DW_FORM_block
:
20251 case DW_FORM_exprloc
:
20252 result
= DW_BLOCK (attr
)->data
;
20253 *len
= DW_BLOCK (attr
)->size
;
20256 /* The DW_AT_const_value attributes are supposed to carry the
20257 symbol's value "represented as it would be on the target
20258 architecture." By the time we get here, it's already been
20259 converted to host endianness, so we just need to sign- or
20260 zero-extend it as appropriate. */
20261 case DW_FORM_data1
:
20262 type
= die_type (die
, cu
);
20263 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
20264 if (result
== NULL
)
20265 result
= write_constant_as_bytes (obstack
, byte_order
,
20268 case DW_FORM_data2
:
20269 type
= die_type (die
, cu
);
20270 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
20271 if (result
== NULL
)
20272 result
= write_constant_as_bytes (obstack
, byte_order
,
20275 case DW_FORM_data4
:
20276 type
= die_type (die
, cu
);
20277 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
20278 if (result
== NULL
)
20279 result
= write_constant_as_bytes (obstack
, byte_order
,
20282 case DW_FORM_data8
:
20283 type
= die_type (die
, cu
);
20284 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
20285 if (result
== NULL
)
20286 result
= write_constant_as_bytes (obstack
, byte_order
,
20290 case DW_FORM_sdata
:
20291 type
= die_type (die
, cu
);
20292 result
= write_constant_as_bytes (obstack
, byte_order
,
20293 type
, DW_SND (attr
), len
);
20296 case DW_FORM_udata
:
20297 type
= die_type (die
, cu
);
20298 result
= write_constant_as_bytes (obstack
, byte_order
,
20299 type
, DW_UNSND (attr
), len
);
20303 complaint (&symfile_complaints
,
20304 _("unsupported const value attribute form: '%s'"),
20305 dwarf_form_name (attr
->form
));
20312 /* Return the type of the DIE at DIE_OFFSET in the CU named by
20316 dwarf2_get_die_type (cu_offset die_offset
,
20317 struct dwarf2_per_cu_data
*per_cu
)
20319 sect_offset die_offset_sect
;
20321 dw2_setup (per_cu
->objfile
);
20323 die_offset_sect
.sect_off
= per_cu
->offset
.sect_off
+ die_offset
.cu_off
;
20324 return get_die_type_at_offset (die_offset_sect
, per_cu
);
20327 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
20328 On entry *REF_CU is the CU of SRC_DIE.
20329 On exit *REF_CU is the CU of the result.
20330 Returns NULL if the referenced DIE isn't found. */
20332 static struct die_info
*
20333 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
20334 struct dwarf2_cu
**ref_cu
)
20336 struct die_info temp_die
;
20337 struct dwarf2_cu
*sig_cu
;
20338 struct die_info
*die
;
20340 /* While it might be nice to assert sig_type->type == NULL here,
20341 we can get here for DW_AT_imported_declaration where we need
20342 the DIE not the type. */
20344 /* If necessary, add it to the queue and load its DIEs. */
20346 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
20347 read_signatured_type (sig_type
);
20349 sig_cu
= sig_type
->per_cu
.cu
;
20350 gdb_assert (sig_cu
!= NULL
);
20351 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
20352 temp_die
.offset
= sig_type
->type_offset_in_section
;
20353 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
20354 temp_die
.offset
.sect_off
);
20357 /* For .gdb_index version 7 keep track of included TUs.
20358 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
20359 if (dwarf2_per_objfile
->index_table
!= NULL
20360 && dwarf2_per_objfile
->index_table
->version
<= 7)
20362 VEC_safe_push (dwarf2_per_cu_ptr
,
20363 (*ref_cu
)->per_cu
->imported_symtabs
,
20374 /* Follow signatured type referenced by ATTR in SRC_DIE.
20375 On entry *REF_CU is the CU of SRC_DIE.
20376 On exit *REF_CU is the CU of the result.
20377 The result is the DIE of the type.
20378 If the referenced type cannot be found an error is thrown. */
20380 static struct die_info
*
20381 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
20382 struct dwarf2_cu
**ref_cu
)
20384 ULONGEST signature
= DW_SIGNATURE (attr
);
20385 struct signatured_type
*sig_type
;
20386 struct die_info
*die
;
20388 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
20390 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
20391 /* sig_type will be NULL if the signatured type is missing from
20393 if (sig_type
== NULL
)
20395 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
20396 " from DIE at 0x%x [in module %s]"),
20397 hex_string (signature
), src_die
->offset
.sect_off
,
20398 objfile_name ((*ref_cu
)->objfile
));
20401 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
20404 dump_die_for_error (src_die
);
20405 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
20406 " from DIE at 0x%x [in module %s]"),
20407 hex_string (signature
), src_die
->offset
.sect_off
,
20408 objfile_name ((*ref_cu
)->objfile
));
20414 /* Get the type specified by SIGNATURE referenced in DIE/CU,
20415 reading in and processing the type unit if necessary. */
20417 static struct type
*
20418 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
20419 struct dwarf2_cu
*cu
)
20421 struct signatured_type
*sig_type
;
20422 struct dwarf2_cu
*type_cu
;
20423 struct die_info
*type_die
;
20426 sig_type
= lookup_signatured_type (cu
, signature
);
20427 /* sig_type will be NULL if the signatured type is missing from
20429 if (sig_type
== NULL
)
20431 complaint (&symfile_complaints
,
20432 _("Dwarf Error: Cannot find signatured DIE %s referenced"
20433 " from DIE at 0x%x [in module %s]"),
20434 hex_string (signature
), die
->offset
.sect_off
,
20435 objfile_name (dwarf2_per_objfile
->objfile
));
20436 return build_error_marker_type (cu
, die
);
20439 /* If we already know the type we're done. */
20440 if (sig_type
->type
!= NULL
)
20441 return sig_type
->type
;
20444 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
20445 if (type_die
!= NULL
)
20447 /* N.B. We need to call get_die_type to ensure only one type for this DIE
20448 is created. This is important, for example, because for c++ classes
20449 we need TYPE_NAME set which is only done by new_symbol. Blech. */
20450 type
= read_type_die (type_die
, type_cu
);
20453 complaint (&symfile_complaints
,
20454 _("Dwarf Error: Cannot build signatured type %s"
20455 " referenced from DIE at 0x%x [in module %s]"),
20456 hex_string (signature
), die
->offset
.sect_off
,
20457 objfile_name (dwarf2_per_objfile
->objfile
));
20458 type
= build_error_marker_type (cu
, die
);
20463 complaint (&symfile_complaints
,
20464 _("Dwarf Error: Problem reading signatured DIE %s referenced"
20465 " from DIE at 0x%x [in module %s]"),
20466 hex_string (signature
), die
->offset
.sect_off
,
20467 objfile_name (dwarf2_per_objfile
->objfile
));
20468 type
= build_error_marker_type (cu
, die
);
20470 sig_type
->type
= type
;
20475 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
20476 reading in and processing the type unit if necessary. */
20478 static struct type
*
20479 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
20480 struct dwarf2_cu
*cu
) /* ARI: editCase function */
20482 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
20483 if (attr_form_is_ref (attr
))
20485 struct dwarf2_cu
*type_cu
= cu
;
20486 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
20488 return read_type_die (type_die
, type_cu
);
20490 else if (attr
->form
== DW_FORM_ref_sig8
)
20492 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
20496 complaint (&symfile_complaints
,
20497 _("Dwarf Error: DW_AT_signature has bad form %s in DIE"
20498 " at 0x%x [in module %s]"),
20499 dwarf_form_name (attr
->form
), die
->offset
.sect_off
,
20500 objfile_name (dwarf2_per_objfile
->objfile
));
20501 return build_error_marker_type (cu
, die
);
20505 /* Load the DIEs associated with type unit PER_CU into memory. */
20508 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
20510 struct signatured_type
*sig_type
;
20512 /* Caller is responsible for ensuring type_unit_groups don't get here. */
20513 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
20515 /* We have the per_cu, but we need the signatured_type.
20516 Fortunately this is an easy translation. */
20517 gdb_assert (per_cu
->is_debug_types
);
20518 sig_type
= (struct signatured_type
*) per_cu
;
20520 gdb_assert (per_cu
->cu
== NULL
);
20522 read_signatured_type (sig_type
);
20524 gdb_assert (per_cu
->cu
!= NULL
);
20527 /* die_reader_func for read_signatured_type.
20528 This is identical to load_full_comp_unit_reader,
20529 but is kept separate for now. */
20532 read_signatured_type_reader (const struct die_reader_specs
*reader
,
20533 const gdb_byte
*info_ptr
,
20534 struct die_info
*comp_unit_die
,
20538 struct dwarf2_cu
*cu
= reader
->cu
;
20540 gdb_assert (cu
->die_hash
== NULL
);
20542 htab_create_alloc_ex (cu
->header
.length
/ 12,
20546 &cu
->comp_unit_obstack
,
20547 hashtab_obstack_allocate
,
20548 dummy_obstack_deallocate
);
20551 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
20552 &info_ptr
, comp_unit_die
);
20553 cu
->dies
= comp_unit_die
;
20554 /* comp_unit_die is not stored in die_hash, no need. */
20556 /* We try not to read any attributes in this function, because not
20557 all CUs needed for references have been loaded yet, and symbol
20558 table processing isn't initialized. But we have to set the CU language,
20559 or we won't be able to build types correctly.
20560 Similarly, if we do not read the producer, we can not apply
20561 producer-specific interpretation. */
20562 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
20565 /* Read in a signatured type and build its CU and DIEs.
20566 If the type is a stub for the real type in a DWO file,
20567 read in the real type from the DWO file as well. */
20570 read_signatured_type (struct signatured_type
*sig_type
)
20572 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
20574 gdb_assert (per_cu
->is_debug_types
);
20575 gdb_assert (per_cu
->cu
== NULL
);
20577 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
20578 read_signatured_type_reader
, NULL
);
20579 sig_type
->per_cu
.tu_read
= 1;
20582 /* Decode simple location descriptions.
20583 Given a pointer to a dwarf block that defines a location, compute
20584 the location and return the value.
20586 NOTE drow/2003-11-18: This function is called in two situations
20587 now: for the address of static or global variables (partial symbols
20588 only) and for offsets into structures which are expected to be
20589 (more or less) constant. The partial symbol case should go away,
20590 and only the constant case should remain. That will let this
20591 function complain more accurately. A few special modes are allowed
20592 without complaint for global variables (for instance, global
20593 register values and thread-local values).
20595 A location description containing no operations indicates that the
20596 object is optimized out. The return value is 0 for that case.
20597 FIXME drow/2003-11-16: No callers check for this case any more; soon all
20598 callers will only want a very basic result and this can become a
20601 Note that stack[0] is unused except as a default error return. */
20604 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
20606 struct objfile
*objfile
= cu
->objfile
;
20608 size_t size
= blk
->size
;
20609 const gdb_byte
*data
= blk
->data
;
20610 CORE_ADDR stack
[64];
20612 unsigned int bytes_read
, unsnd
;
20618 stack
[++stacki
] = 0;
20657 stack
[++stacki
] = op
- DW_OP_lit0
;
20692 stack
[++stacki
] = op
- DW_OP_reg0
;
20694 dwarf2_complex_location_expr_complaint ();
20698 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
20700 stack
[++stacki
] = unsnd
;
20702 dwarf2_complex_location_expr_complaint ();
20706 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
20711 case DW_OP_const1u
:
20712 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
20716 case DW_OP_const1s
:
20717 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
20721 case DW_OP_const2u
:
20722 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
20726 case DW_OP_const2s
:
20727 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
20731 case DW_OP_const4u
:
20732 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
20736 case DW_OP_const4s
:
20737 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
20741 case DW_OP_const8u
:
20742 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
20747 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
20753 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
20758 stack
[stacki
+ 1] = stack
[stacki
];
20763 stack
[stacki
- 1] += stack
[stacki
];
20767 case DW_OP_plus_uconst
:
20768 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
20774 stack
[stacki
- 1] -= stack
[stacki
];
20779 /* If we're not the last op, then we definitely can't encode
20780 this using GDB's address_class enum. This is valid for partial
20781 global symbols, although the variable's address will be bogus
20784 dwarf2_complex_location_expr_complaint ();
20787 case DW_OP_GNU_push_tls_address
:
20788 /* The top of the stack has the offset from the beginning
20789 of the thread control block at which the variable is located. */
20790 /* Nothing should follow this operator, so the top of stack would
20792 /* This is valid for partial global symbols, but the variable's
20793 address will be bogus in the psymtab. Make it always at least
20794 non-zero to not look as a variable garbage collected by linker
20795 which have DW_OP_addr 0. */
20797 dwarf2_complex_location_expr_complaint ();
20801 case DW_OP_GNU_uninit
:
20804 case DW_OP_GNU_addr_index
:
20805 case DW_OP_GNU_const_index
:
20806 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
20813 const char *name
= get_DW_OP_name (op
);
20816 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
20819 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
20823 return (stack
[stacki
]);
20826 /* Enforce maximum stack depth of SIZE-1 to avoid writing
20827 outside of the allocated space. Also enforce minimum>0. */
20828 if (stacki
>= ARRAY_SIZE (stack
) - 1)
20830 complaint (&symfile_complaints
,
20831 _("location description stack overflow"));
20837 complaint (&symfile_complaints
,
20838 _("location description stack underflow"));
20842 return (stack
[stacki
]);
20845 /* memory allocation interface */
20847 static struct dwarf_block
*
20848 dwarf_alloc_block (struct dwarf2_cu
*cu
)
20850 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
20853 static struct die_info
*
20854 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
20856 struct die_info
*die
;
20857 size_t size
= sizeof (struct die_info
);
20860 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
20862 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
20863 memset (die
, 0, sizeof (struct die_info
));
20868 /* Macro support. */
20870 /* Return file name relative to the compilation directory of file number I in
20871 *LH's file name table. The result is allocated using xmalloc; the caller is
20872 responsible for freeing it. */
20875 file_file_name (int file
, struct line_header
*lh
)
20877 /* Is the file number a valid index into the line header's file name
20878 table? Remember that file numbers start with one, not zero. */
20879 if (1 <= file
&& file
<= lh
->num_file_names
)
20881 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
20883 if (IS_ABSOLUTE_PATH (fe
->name
) || fe
->dir_index
== 0
20884 || lh
->include_dirs
== NULL
)
20885 return xstrdup (fe
->name
);
20886 return concat (lh
->include_dirs
[fe
->dir_index
- 1], SLASH_STRING
,
20887 fe
->name
, (char *) NULL
);
20891 /* The compiler produced a bogus file number. We can at least
20892 record the macro definitions made in the file, even if we
20893 won't be able to find the file by name. */
20894 char fake_name
[80];
20896 xsnprintf (fake_name
, sizeof (fake_name
),
20897 "<bad macro file number %d>", file
);
20899 complaint (&symfile_complaints
,
20900 _("bad file number in macro information (%d)"),
20903 return xstrdup (fake_name
);
20907 /* Return the full name of file number I in *LH's file name table.
20908 Use COMP_DIR as the name of the current directory of the
20909 compilation. The result is allocated using xmalloc; the caller is
20910 responsible for freeing it. */
20912 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
20914 /* Is the file number a valid index into the line header's file name
20915 table? Remember that file numbers start with one, not zero. */
20916 if (1 <= file
&& file
<= lh
->num_file_names
)
20918 char *relative
= file_file_name (file
, lh
);
20920 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
20922 return reconcat (relative
, comp_dir
, SLASH_STRING
,
20923 relative
, (char *) NULL
);
20926 return file_file_name (file
, lh
);
20930 static struct macro_source_file
*
20931 macro_start_file (int file
, int line
,
20932 struct macro_source_file
*current_file
,
20933 struct line_header
*lh
)
20935 /* File name relative to the compilation directory of this source file. */
20936 char *file_name
= file_file_name (file
, lh
);
20938 if (! current_file
)
20940 /* Note: We don't create a macro table for this compilation unit
20941 at all until we actually get a filename. */
20942 struct macro_table
*macro_table
= get_macro_table ();
20944 /* If we have no current file, then this must be the start_file
20945 directive for the compilation unit's main source file. */
20946 current_file
= macro_set_main (macro_table
, file_name
);
20947 macro_define_special (macro_table
);
20950 current_file
= macro_include (current_file
, line
, file_name
);
20954 return current_file
;
20958 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
20959 followed by a null byte. */
20961 copy_string (const char *buf
, int len
)
20963 char *s
= (char *) xmalloc (len
+ 1);
20965 memcpy (s
, buf
, len
);
20971 static const char *
20972 consume_improper_spaces (const char *p
, const char *body
)
20976 complaint (&symfile_complaints
,
20977 _("macro definition contains spaces "
20978 "in formal argument list:\n`%s'"),
20990 parse_macro_definition (struct macro_source_file
*file
, int line
,
20995 /* The body string takes one of two forms. For object-like macro
20996 definitions, it should be:
20998 <macro name> " " <definition>
21000 For function-like macro definitions, it should be:
21002 <macro name> "() " <definition>
21004 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
21006 Spaces may appear only where explicitly indicated, and in the
21009 The Dwarf 2 spec says that an object-like macro's name is always
21010 followed by a space, but versions of GCC around March 2002 omit
21011 the space when the macro's definition is the empty string.
21013 The Dwarf 2 spec says that there should be no spaces between the
21014 formal arguments in a function-like macro's formal argument list,
21015 but versions of GCC around March 2002 include spaces after the
21019 /* Find the extent of the macro name. The macro name is terminated
21020 by either a space or null character (for an object-like macro) or
21021 an opening paren (for a function-like macro). */
21022 for (p
= body
; *p
; p
++)
21023 if (*p
== ' ' || *p
== '(')
21026 if (*p
== ' ' || *p
== '\0')
21028 /* It's an object-like macro. */
21029 int name_len
= p
- body
;
21030 char *name
= copy_string (body
, name_len
);
21031 const char *replacement
;
21034 replacement
= body
+ name_len
+ 1;
21037 dwarf2_macro_malformed_definition_complaint (body
);
21038 replacement
= body
+ name_len
;
21041 macro_define_object (file
, line
, name
, replacement
);
21045 else if (*p
== '(')
21047 /* It's a function-like macro. */
21048 char *name
= copy_string (body
, p
- body
);
21051 char **argv
= XNEWVEC (char *, argv_size
);
21055 p
= consume_improper_spaces (p
, body
);
21057 /* Parse the formal argument list. */
21058 while (*p
&& *p
!= ')')
21060 /* Find the extent of the current argument name. */
21061 const char *arg_start
= p
;
21063 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
21066 if (! *p
|| p
== arg_start
)
21067 dwarf2_macro_malformed_definition_complaint (body
);
21070 /* Make sure argv has room for the new argument. */
21071 if (argc
>= argv_size
)
21074 argv
= XRESIZEVEC (char *, argv
, argv_size
);
21077 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
21080 p
= consume_improper_spaces (p
, body
);
21082 /* Consume the comma, if present. */
21087 p
= consume_improper_spaces (p
, body
);
21096 /* Perfectly formed definition, no complaints. */
21097 macro_define_function (file
, line
, name
,
21098 argc
, (const char **) argv
,
21100 else if (*p
== '\0')
21102 /* Complain, but do define it. */
21103 dwarf2_macro_malformed_definition_complaint (body
);
21104 macro_define_function (file
, line
, name
,
21105 argc
, (const char **) argv
,
21109 /* Just complain. */
21110 dwarf2_macro_malformed_definition_complaint (body
);
21113 /* Just complain. */
21114 dwarf2_macro_malformed_definition_complaint (body
);
21120 for (i
= 0; i
< argc
; i
++)
21126 dwarf2_macro_malformed_definition_complaint (body
);
21129 /* Skip some bytes from BYTES according to the form given in FORM.
21130 Returns the new pointer. */
21132 static const gdb_byte
*
21133 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
21134 enum dwarf_form form
,
21135 unsigned int offset_size
,
21136 struct dwarf2_section_info
*section
)
21138 unsigned int bytes_read
;
21142 case DW_FORM_data1
:
21147 case DW_FORM_data2
:
21151 case DW_FORM_data4
:
21155 case DW_FORM_data8
:
21159 case DW_FORM_string
:
21160 read_direct_string (abfd
, bytes
, &bytes_read
);
21161 bytes
+= bytes_read
;
21164 case DW_FORM_sec_offset
:
21166 case DW_FORM_GNU_strp_alt
:
21167 bytes
+= offset_size
;
21170 case DW_FORM_block
:
21171 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
21172 bytes
+= bytes_read
;
21175 case DW_FORM_block1
:
21176 bytes
+= 1 + read_1_byte (abfd
, bytes
);
21178 case DW_FORM_block2
:
21179 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
21181 case DW_FORM_block4
:
21182 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
21185 case DW_FORM_sdata
:
21186 case DW_FORM_udata
:
21187 case DW_FORM_GNU_addr_index
:
21188 case DW_FORM_GNU_str_index
:
21189 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
21192 dwarf2_section_buffer_overflow_complaint (section
);
21200 complaint (&symfile_complaints
,
21201 _("invalid form 0x%x in `%s'"),
21202 form
, get_section_name (section
));
21210 /* A helper for dwarf_decode_macros that handles skipping an unknown
21211 opcode. Returns an updated pointer to the macro data buffer; or,
21212 on error, issues a complaint and returns NULL. */
21214 static const gdb_byte
*
21215 skip_unknown_opcode (unsigned int opcode
,
21216 const gdb_byte
**opcode_definitions
,
21217 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
21219 unsigned int offset_size
,
21220 struct dwarf2_section_info
*section
)
21222 unsigned int bytes_read
, i
;
21224 const gdb_byte
*defn
;
21226 if (opcode_definitions
[opcode
] == NULL
)
21228 complaint (&symfile_complaints
,
21229 _("unrecognized DW_MACFINO opcode 0x%x"),
21234 defn
= opcode_definitions
[opcode
];
21235 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
21236 defn
+= bytes_read
;
21238 for (i
= 0; i
< arg
; ++i
)
21240 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
,
21241 (enum dwarf_form
) defn
[i
], offset_size
,
21243 if (mac_ptr
== NULL
)
21245 /* skip_form_bytes already issued the complaint. */
21253 /* A helper function which parses the header of a macro section.
21254 If the macro section is the extended (for now called "GNU") type,
21255 then this updates *OFFSET_SIZE. Returns a pointer to just after
21256 the header, or issues a complaint and returns NULL on error. */
21258 static const gdb_byte
*
21259 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
21261 const gdb_byte
*mac_ptr
,
21262 unsigned int *offset_size
,
21263 int section_is_gnu
)
21265 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
21267 if (section_is_gnu
)
21269 unsigned int version
, flags
;
21271 version
= read_2_bytes (abfd
, mac_ptr
);
21274 complaint (&symfile_complaints
,
21275 _("unrecognized version `%d' in .debug_macro section"),
21281 flags
= read_1_byte (abfd
, mac_ptr
);
21283 *offset_size
= (flags
& 1) ? 8 : 4;
21285 if ((flags
& 2) != 0)
21286 /* We don't need the line table offset. */
21287 mac_ptr
+= *offset_size
;
21289 /* Vendor opcode descriptions. */
21290 if ((flags
& 4) != 0)
21292 unsigned int i
, count
;
21294 count
= read_1_byte (abfd
, mac_ptr
);
21296 for (i
= 0; i
< count
; ++i
)
21298 unsigned int opcode
, bytes_read
;
21301 opcode
= read_1_byte (abfd
, mac_ptr
);
21303 opcode_definitions
[opcode
] = mac_ptr
;
21304 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21305 mac_ptr
+= bytes_read
;
21314 /* A helper for dwarf_decode_macros that handles the GNU extensions,
21315 including DW_MACRO_GNU_transparent_include. */
21318 dwarf_decode_macro_bytes (bfd
*abfd
,
21319 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
21320 struct macro_source_file
*current_file
,
21321 struct line_header
*lh
,
21322 struct dwarf2_section_info
*section
,
21323 int section_is_gnu
, int section_is_dwz
,
21324 unsigned int offset_size
,
21325 htab_t include_hash
)
21327 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21328 enum dwarf_macro_record_type macinfo_type
;
21329 int at_commandline
;
21330 const gdb_byte
*opcode_definitions
[256];
21332 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
21333 &offset_size
, section_is_gnu
);
21334 if (mac_ptr
== NULL
)
21336 /* We already issued a complaint. */
21340 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
21341 GDB is still reading the definitions from command line. First
21342 DW_MACINFO_start_file will need to be ignored as it was already executed
21343 to create CURRENT_FILE for the main source holding also the command line
21344 definitions. On first met DW_MACINFO_start_file this flag is reset to
21345 normally execute all the remaining DW_MACINFO_start_file macinfos. */
21347 at_commandline
= 1;
21351 /* Do we at least have room for a macinfo type byte? */
21352 if (mac_ptr
>= mac_end
)
21354 dwarf2_section_buffer_overflow_complaint (section
);
21358 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
21361 /* Note that we rely on the fact that the corresponding GNU and
21362 DWARF constants are the same. */
21363 switch (macinfo_type
)
21365 /* A zero macinfo type indicates the end of the macro
21370 case DW_MACRO_GNU_define
:
21371 case DW_MACRO_GNU_undef
:
21372 case DW_MACRO_GNU_define_indirect
:
21373 case DW_MACRO_GNU_undef_indirect
:
21374 case DW_MACRO_GNU_define_indirect_alt
:
21375 case DW_MACRO_GNU_undef_indirect_alt
:
21377 unsigned int bytes_read
;
21382 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21383 mac_ptr
+= bytes_read
;
21385 if (macinfo_type
== DW_MACRO_GNU_define
21386 || macinfo_type
== DW_MACRO_GNU_undef
)
21388 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21389 mac_ptr
+= bytes_read
;
21393 LONGEST str_offset
;
21395 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
21396 mac_ptr
+= offset_size
;
21398 if (macinfo_type
== DW_MACRO_GNU_define_indirect_alt
21399 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
21402 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
21404 body
= read_indirect_string_from_dwz (dwz
, str_offset
);
21407 body
= read_indirect_string_at_offset (abfd
, str_offset
);
21410 is_define
= (macinfo_type
== DW_MACRO_GNU_define
21411 || macinfo_type
== DW_MACRO_GNU_define_indirect
21412 || macinfo_type
== DW_MACRO_GNU_define_indirect_alt
);
21413 if (! current_file
)
21415 /* DWARF violation as no main source is present. */
21416 complaint (&symfile_complaints
,
21417 _("debug info with no main source gives macro %s "
21419 is_define
? _("definition") : _("undefinition"),
21423 if ((line
== 0 && !at_commandline
)
21424 || (line
!= 0 && at_commandline
))
21425 complaint (&symfile_complaints
,
21426 _("debug info gives %s macro %s with %s line %d: %s"),
21427 at_commandline
? _("command-line") : _("in-file"),
21428 is_define
? _("definition") : _("undefinition"),
21429 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
21432 parse_macro_definition (current_file
, line
, body
);
21435 gdb_assert (macinfo_type
== DW_MACRO_GNU_undef
21436 || macinfo_type
== DW_MACRO_GNU_undef_indirect
21437 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
);
21438 macro_undef (current_file
, line
, body
);
21443 case DW_MACRO_GNU_start_file
:
21445 unsigned int bytes_read
;
21448 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21449 mac_ptr
+= bytes_read
;
21450 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21451 mac_ptr
+= bytes_read
;
21453 if ((line
== 0 && !at_commandline
)
21454 || (line
!= 0 && at_commandline
))
21455 complaint (&symfile_complaints
,
21456 _("debug info gives source %d included "
21457 "from %s at %s line %d"),
21458 file
, at_commandline
? _("command-line") : _("file"),
21459 line
== 0 ? _("zero") : _("non-zero"), line
);
21461 if (at_commandline
)
21463 /* This DW_MACRO_GNU_start_file was executed in the
21465 at_commandline
= 0;
21468 current_file
= macro_start_file (file
, line
, current_file
, lh
);
21472 case DW_MACRO_GNU_end_file
:
21473 if (! current_file
)
21474 complaint (&symfile_complaints
,
21475 _("macro debug info has an unmatched "
21476 "`close_file' directive"));
21479 current_file
= current_file
->included_by
;
21480 if (! current_file
)
21482 enum dwarf_macro_record_type next_type
;
21484 /* GCC circa March 2002 doesn't produce the zero
21485 type byte marking the end of the compilation
21486 unit. Complain if it's not there, but exit no
21489 /* Do we at least have room for a macinfo type byte? */
21490 if (mac_ptr
>= mac_end
)
21492 dwarf2_section_buffer_overflow_complaint (section
);
21496 /* We don't increment mac_ptr here, so this is just
21499 = (enum dwarf_macro_record_type
) read_1_byte (abfd
,
21501 if (next_type
!= 0)
21502 complaint (&symfile_complaints
,
21503 _("no terminating 0-type entry for "
21504 "macros in `.debug_macinfo' section"));
21511 case DW_MACRO_GNU_transparent_include
:
21512 case DW_MACRO_GNU_transparent_include_alt
:
21516 bfd
*include_bfd
= abfd
;
21517 struct dwarf2_section_info
*include_section
= section
;
21518 const gdb_byte
*include_mac_end
= mac_end
;
21519 int is_dwz
= section_is_dwz
;
21520 const gdb_byte
*new_mac_ptr
;
21522 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
21523 mac_ptr
+= offset_size
;
21525 if (macinfo_type
== DW_MACRO_GNU_transparent_include_alt
)
21527 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
21529 dwarf2_read_section (objfile
, &dwz
->macro
);
21531 include_section
= &dwz
->macro
;
21532 include_bfd
= get_section_bfd_owner (include_section
);
21533 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
21537 new_mac_ptr
= include_section
->buffer
+ offset
;
21538 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
21542 /* This has actually happened; see
21543 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
21544 complaint (&symfile_complaints
,
21545 _("recursive DW_MACRO_GNU_transparent_include in "
21546 ".debug_macro section"));
21550 *slot
= (void *) new_mac_ptr
;
21552 dwarf_decode_macro_bytes (include_bfd
, new_mac_ptr
,
21553 include_mac_end
, current_file
, lh
,
21554 section
, section_is_gnu
, is_dwz
,
21555 offset_size
, include_hash
);
21557 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
21562 case DW_MACINFO_vendor_ext
:
21563 if (!section_is_gnu
)
21565 unsigned int bytes_read
;
21568 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21569 mac_ptr
+= bytes_read
;
21570 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21571 mac_ptr
+= bytes_read
;
21573 /* We don't recognize any vendor extensions. */
21579 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
21580 mac_ptr
, mac_end
, abfd
, offset_size
,
21582 if (mac_ptr
== NULL
)
21586 } while (macinfo_type
!= 0);
21590 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
21591 int section_is_gnu
)
21593 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21594 struct line_header
*lh
= cu
->line_header
;
21596 const gdb_byte
*mac_ptr
, *mac_end
;
21597 struct macro_source_file
*current_file
= 0;
21598 enum dwarf_macro_record_type macinfo_type
;
21599 unsigned int offset_size
= cu
->header
.offset_size
;
21600 const gdb_byte
*opcode_definitions
[256];
21601 struct cleanup
*cleanup
;
21602 htab_t include_hash
;
21604 struct dwarf2_section_info
*section
;
21605 const char *section_name
;
21607 if (cu
->dwo_unit
!= NULL
)
21609 if (section_is_gnu
)
21611 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
21612 section_name
= ".debug_macro.dwo";
21616 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
21617 section_name
= ".debug_macinfo.dwo";
21622 if (section_is_gnu
)
21624 section
= &dwarf2_per_objfile
->macro
;
21625 section_name
= ".debug_macro";
21629 section
= &dwarf2_per_objfile
->macinfo
;
21630 section_name
= ".debug_macinfo";
21634 dwarf2_read_section (objfile
, section
);
21635 if (section
->buffer
== NULL
)
21637 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
21640 abfd
= get_section_bfd_owner (section
);
21642 /* First pass: Find the name of the base filename.
21643 This filename is needed in order to process all macros whose definition
21644 (or undefinition) comes from the command line. These macros are defined
21645 before the first DW_MACINFO_start_file entry, and yet still need to be
21646 associated to the base file.
21648 To determine the base file name, we scan the macro definitions until we
21649 reach the first DW_MACINFO_start_file entry. We then initialize
21650 CURRENT_FILE accordingly so that any macro definition found before the
21651 first DW_MACINFO_start_file can still be associated to the base file. */
21653 mac_ptr
= section
->buffer
+ offset
;
21654 mac_end
= section
->buffer
+ section
->size
;
21656 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
21657 &offset_size
, section_is_gnu
);
21658 if (mac_ptr
== NULL
)
21660 /* We already issued a complaint. */
21666 /* Do we at least have room for a macinfo type byte? */
21667 if (mac_ptr
>= mac_end
)
21669 /* Complaint is printed during the second pass as GDB will probably
21670 stop the first pass earlier upon finding
21671 DW_MACINFO_start_file. */
21675 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
21678 /* Note that we rely on the fact that the corresponding GNU and
21679 DWARF constants are the same. */
21680 switch (macinfo_type
)
21682 /* A zero macinfo type indicates the end of the macro
21687 case DW_MACRO_GNU_define
:
21688 case DW_MACRO_GNU_undef
:
21689 /* Only skip the data by MAC_PTR. */
21691 unsigned int bytes_read
;
21693 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21694 mac_ptr
+= bytes_read
;
21695 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21696 mac_ptr
+= bytes_read
;
21700 case DW_MACRO_GNU_start_file
:
21702 unsigned int bytes_read
;
21705 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21706 mac_ptr
+= bytes_read
;
21707 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21708 mac_ptr
+= bytes_read
;
21710 current_file
= macro_start_file (file
, line
, current_file
, lh
);
21714 case DW_MACRO_GNU_end_file
:
21715 /* No data to skip by MAC_PTR. */
21718 case DW_MACRO_GNU_define_indirect
:
21719 case DW_MACRO_GNU_undef_indirect
:
21720 case DW_MACRO_GNU_define_indirect_alt
:
21721 case DW_MACRO_GNU_undef_indirect_alt
:
21723 unsigned int bytes_read
;
21725 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21726 mac_ptr
+= bytes_read
;
21727 mac_ptr
+= offset_size
;
21731 case DW_MACRO_GNU_transparent_include
:
21732 case DW_MACRO_GNU_transparent_include_alt
:
21733 /* Note that, according to the spec, a transparent include
21734 chain cannot call DW_MACRO_GNU_start_file. So, we can just
21735 skip this opcode. */
21736 mac_ptr
+= offset_size
;
21739 case DW_MACINFO_vendor_ext
:
21740 /* Only skip the data by MAC_PTR. */
21741 if (!section_is_gnu
)
21743 unsigned int bytes_read
;
21745 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21746 mac_ptr
+= bytes_read
;
21747 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21748 mac_ptr
+= bytes_read
;
21753 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
21754 mac_ptr
, mac_end
, abfd
, offset_size
,
21756 if (mac_ptr
== NULL
)
21760 } while (macinfo_type
!= 0 && current_file
== NULL
);
21762 /* Second pass: Process all entries.
21764 Use the AT_COMMAND_LINE flag to determine whether we are still processing
21765 command-line macro definitions/undefinitions. This flag is unset when we
21766 reach the first DW_MACINFO_start_file entry. */
21768 include_hash
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
21769 NULL
, xcalloc
, xfree
);
21770 cleanup
= make_cleanup_htab_delete (include_hash
);
21771 mac_ptr
= section
->buffer
+ offset
;
21772 slot
= htab_find_slot (include_hash
, mac_ptr
, INSERT
);
21773 *slot
= (void *) mac_ptr
;
21774 dwarf_decode_macro_bytes (abfd
, mac_ptr
, mac_end
,
21775 current_file
, lh
, section
,
21776 section_is_gnu
, 0, offset_size
, include_hash
);
21777 do_cleanups (cleanup
);
21780 /* Check if the attribute's form is a DW_FORM_block*
21781 if so return true else false. */
21784 attr_form_is_block (const struct attribute
*attr
)
21786 return (attr
== NULL
? 0 :
21787 attr
->form
== DW_FORM_block1
21788 || attr
->form
== DW_FORM_block2
21789 || attr
->form
== DW_FORM_block4
21790 || attr
->form
== DW_FORM_block
21791 || attr
->form
== DW_FORM_exprloc
);
21794 /* Return non-zero if ATTR's value is a section offset --- classes
21795 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
21796 You may use DW_UNSND (attr) to retrieve such offsets.
21798 Section 7.5.4, "Attribute Encodings", explains that no attribute
21799 may have a value that belongs to more than one of these classes; it
21800 would be ambiguous if we did, because we use the same forms for all
21804 attr_form_is_section_offset (const struct attribute
*attr
)
21806 return (attr
->form
== DW_FORM_data4
21807 || attr
->form
== DW_FORM_data8
21808 || attr
->form
== DW_FORM_sec_offset
);
21811 /* Return non-zero if ATTR's value falls in the 'constant' class, or
21812 zero otherwise. When this function returns true, you can apply
21813 dwarf2_get_attr_constant_value to it.
21815 However, note that for some attributes you must check
21816 attr_form_is_section_offset before using this test. DW_FORM_data4
21817 and DW_FORM_data8 are members of both the constant class, and of
21818 the classes that contain offsets into other debug sections
21819 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
21820 that, if an attribute's can be either a constant or one of the
21821 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
21822 taken as section offsets, not constants. */
21825 attr_form_is_constant (const struct attribute
*attr
)
21827 switch (attr
->form
)
21829 case DW_FORM_sdata
:
21830 case DW_FORM_udata
:
21831 case DW_FORM_data1
:
21832 case DW_FORM_data2
:
21833 case DW_FORM_data4
:
21834 case DW_FORM_data8
:
21842 /* DW_ADDR is always stored already as sect_offset; despite for the forms
21843 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
21846 attr_form_is_ref (const struct attribute
*attr
)
21848 switch (attr
->form
)
21850 case DW_FORM_ref_addr
:
21855 case DW_FORM_ref_udata
:
21856 case DW_FORM_GNU_ref_alt
:
21863 /* Return the .debug_loc section to use for CU.
21864 For DWO files use .debug_loc.dwo. */
21866 static struct dwarf2_section_info
*
21867 cu_debug_loc_section (struct dwarf2_cu
*cu
)
21870 return &cu
->dwo_unit
->dwo_file
->sections
.loc
;
21871 return &dwarf2_per_objfile
->loc
;
21874 /* A helper function that fills in a dwarf2_loclist_baton. */
21877 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
21878 struct dwarf2_loclist_baton
*baton
,
21879 const struct attribute
*attr
)
21881 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
21883 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
21885 baton
->per_cu
= cu
->per_cu
;
21886 gdb_assert (baton
->per_cu
);
21887 /* We don't know how long the location list is, but make sure we
21888 don't run off the edge of the section. */
21889 baton
->size
= section
->size
- DW_UNSND (attr
);
21890 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
21891 baton
->base_address
= cu
->base_address
;
21892 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
21896 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
21897 struct dwarf2_cu
*cu
, int is_block
)
21899 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21900 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
21902 if (attr_form_is_section_offset (attr
)
21903 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
21904 the section. If so, fall through to the complaint in the
21906 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
21908 struct dwarf2_loclist_baton
*baton
;
21910 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
21912 fill_in_loclist_baton (cu
, baton
, attr
);
21914 if (cu
->base_known
== 0)
21915 complaint (&symfile_complaints
,
21916 _("Location list used without "
21917 "specifying the CU base address."));
21919 SYMBOL_ACLASS_INDEX (sym
) = (is_block
21920 ? dwarf2_loclist_block_index
21921 : dwarf2_loclist_index
);
21922 SYMBOL_LOCATION_BATON (sym
) = baton
;
21926 struct dwarf2_locexpr_baton
*baton
;
21928 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
21929 baton
->per_cu
= cu
->per_cu
;
21930 gdb_assert (baton
->per_cu
);
21932 if (attr_form_is_block (attr
))
21934 /* Note that we're just copying the block's data pointer
21935 here, not the actual data. We're still pointing into the
21936 info_buffer for SYM's objfile; right now we never release
21937 that buffer, but when we do clean up properly this may
21939 baton
->size
= DW_BLOCK (attr
)->size
;
21940 baton
->data
= DW_BLOCK (attr
)->data
;
21944 dwarf2_invalid_attrib_class_complaint ("location description",
21945 SYMBOL_NATURAL_NAME (sym
));
21949 SYMBOL_ACLASS_INDEX (sym
) = (is_block
21950 ? dwarf2_locexpr_block_index
21951 : dwarf2_locexpr_index
);
21952 SYMBOL_LOCATION_BATON (sym
) = baton
;
21956 /* Return the OBJFILE associated with the compilation unit CU. If CU
21957 came from a separate debuginfo file, then the master objfile is
21961 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
21963 struct objfile
*objfile
= per_cu
->objfile
;
21965 /* Return the master objfile, so that we can report and look up the
21966 correct file containing this variable. */
21967 if (objfile
->separate_debug_objfile_backlink
)
21968 objfile
= objfile
->separate_debug_objfile_backlink
;
21973 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
21974 (CU_HEADERP is unused in such case) or prepare a temporary copy at
21975 CU_HEADERP first. */
21977 static const struct comp_unit_head
*
21978 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
21979 struct dwarf2_per_cu_data
*per_cu
)
21981 const gdb_byte
*info_ptr
;
21984 return &per_cu
->cu
->header
;
21986 info_ptr
= per_cu
->section
->buffer
+ per_cu
->offset
.sect_off
;
21988 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
21989 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->objfile
->obfd
);
21994 /* Return the address size given in the compilation unit header for CU. */
21997 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
21999 struct comp_unit_head cu_header_local
;
22000 const struct comp_unit_head
*cu_headerp
;
22002 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
22004 return cu_headerp
->addr_size
;
22007 /* Return the offset size given in the compilation unit header for CU. */
22010 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
22012 struct comp_unit_head cu_header_local
;
22013 const struct comp_unit_head
*cu_headerp
;
22015 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
22017 return cu_headerp
->offset_size
;
22020 /* See its dwarf2loc.h declaration. */
22023 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
22025 struct comp_unit_head cu_header_local
;
22026 const struct comp_unit_head
*cu_headerp
;
22028 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
22030 if (cu_headerp
->version
== 2)
22031 return cu_headerp
->addr_size
;
22033 return cu_headerp
->offset_size
;
22036 /* Return the text offset of the CU. The returned offset comes from
22037 this CU's objfile. If this objfile came from a separate debuginfo
22038 file, then the offset may be different from the corresponding
22039 offset in the parent objfile. */
22042 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
22044 struct objfile
*objfile
= per_cu
->objfile
;
22046 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
22049 /* Locate the .debug_info compilation unit from CU's objfile which contains
22050 the DIE at OFFSET. Raises an error on failure. */
22052 static struct dwarf2_per_cu_data
*
22053 dwarf2_find_containing_comp_unit (sect_offset offset
,
22054 unsigned int offset_in_dwz
,
22055 struct objfile
*objfile
)
22057 struct dwarf2_per_cu_data
*this_cu
;
22059 const sect_offset
*cu_off
;
22062 high
= dwarf2_per_objfile
->n_comp_units
- 1;
22065 struct dwarf2_per_cu_data
*mid_cu
;
22066 int mid
= low
+ (high
- low
) / 2;
22068 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
22069 cu_off
= &mid_cu
->offset
;
22070 if (mid_cu
->is_dwz
> offset_in_dwz
22071 || (mid_cu
->is_dwz
== offset_in_dwz
22072 && cu_off
->sect_off
>= offset
.sect_off
))
22077 gdb_assert (low
== high
);
22078 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
22079 cu_off
= &this_cu
->offset
;
22080 if (this_cu
->is_dwz
!= offset_in_dwz
|| cu_off
->sect_off
> offset
.sect_off
)
22082 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
22083 error (_("Dwarf Error: could not find partial DIE containing "
22084 "offset 0x%lx [in module %s]"),
22085 (long) offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
22087 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
.sect_off
22088 <= offset
.sect_off
);
22089 return dwarf2_per_objfile
->all_comp_units
[low
-1];
22093 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
22094 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
22095 && offset
.sect_off
>= this_cu
->offset
.sect_off
+ this_cu
->length
)
22096 error (_("invalid dwarf2 offset %u"), offset
.sect_off
);
22097 gdb_assert (offset
.sect_off
< this_cu
->offset
.sect_off
+ this_cu
->length
);
22102 /* Initialize dwarf2_cu CU, owned by PER_CU. */
22105 init_one_comp_unit (struct dwarf2_cu
*cu
, struct dwarf2_per_cu_data
*per_cu
)
22107 memset (cu
, 0, sizeof (*cu
));
22109 cu
->per_cu
= per_cu
;
22110 cu
->objfile
= per_cu
->objfile
;
22111 obstack_init (&cu
->comp_unit_obstack
);
22114 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
22117 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
22118 enum language pretend_language
)
22120 struct attribute
*attr
;
22122 /* Set the language we're debugging. */
22123 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
22125 set_cu_language (DW_UNSND (attr
), cu
);
22128 cu
->language
= pretend_language
;
22129 cu
->language_defn
= language_def (cu
->language
);
22132 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
22135 /* Release one cached compilation unit, CU. We unlink it from the tree
22136 of compilation units, but we don't remove it from the read_in_chain;
22137 the caller is responsible for that.
22138 NOTE: DATA is a void * because this function is also used as a
22139 cleanup routine. */
22142 free_heap_comp_unit (void *data
)
22144 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) data
;
22146 gdb_assert (cu
->per_cu
!= NULL
);
22147 cu
->per_cu
->cu
= NULL
;
22150 obstack_free (&cu
->comp_unit_obstack
, NULL
);
22155 /* This cleanup function is passed the address of a dwarf2_cu on the stack
22156 when we're finished with it. We can't free the pointer itself, but be
22157 sure to unlink it from the cache. Also release any associated storage. */
22160 free_stack_comp_unit (void *data
)
22162 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) data
;
22164 gdb_assert (cu
->per_cu
!= NULL
);
22165 cu
->per_cu
->cu
= NULL
;
22168 obstack_free (&cu
->comp_unit_obstack
, NULL
);
22169 cu
->partial_dies
= NULL
;
22172 /* Free all cached compilation units. */
22175 free_cached_comp_units (void *data
)
22177 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22179 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22180 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22181 while (per_cu
!= NULL
)
22183 struct dwarf2_per_cu_data
*next_cu
;
22185 next_cu
= per_cu
->cu
->read_in_chain
;
22187 free_heap_comp_unit (per_cu
->cu
);
22188 *last_chain
= next_cu
;
22194 /* Increase the age counter on each cached compilation unit, and free
22195 any that are too old. */
22198 age_cached_comp_units (void)
22200 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22202 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
22203 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22204 while (per_cu
!= NULL
)
22206 per_cu
->cu
->last_used
++;
22207 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
22208 dwarf2_mark (per_cu
->cu
);
22209 per_cu
= per_cu
->cu
->read_in_chain
;
22212 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22213 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22214 while (per_cu
!= NULL
)
22216 struct dwarf2_per_cu_data
*next_cu
;
22218 next_cu
= per_cu
->cu
->read_in_chain
;
22220 if (!per_cu
->cu
->mark
)
22222 free_heap_comp_unit (per_cu
->cu
);
22223 *last_chain
= next_cu
;
22226 last_chain
= &per_cu
->cu
->read_in_chain
;
22232 /* Remove a single compilation unit from the cache. */
22235 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
22237 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22239 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22240 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22241 while (per_cu
!= NULL
)
22243 struct dwarf2_per_cu_data
*next_cu
;
22245 next_cu
= per_cu
->cu
->read_in_chain
;
22247 if (per_cu
== target_per_cu
)
22249 free_heap_comp_unit (per_cu
->cu
);
22251 *last_chain
= next_cu
;
22255 last_chain
= &per_cu
->cu
->read_in_chain
;
22261 /* Release all extra memory associated with OBJFILE. */
22264 dwarf2_free_objfile (struct objfile
*objfile
)
22267 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
22268 dwarf2_objfile_data_key
);
22270 if (dwarf2_per_objfile
== NULL
)
22273 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
22274 free_cached_comp_units (NULL
);
22276 if (dwarf2_per_objfile
->quick_file_names_table
)
22277 htab_delete (dwarf2_per_objfile
->quick_file_names_table
);
22279 if (dwarf2_per_objfile
->line_header_hash
)
22280 htab_delete (dwarf2_per_objfile
->line_header_hash
);
22282 /* Everything else should be on the objfile obstack. */
22285 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
22286 We store these in a hash table separate from the DIEs, and preserve them
22287 when the DIEs are flushed out of cache.
22289 The CU "per_cu" pointer is needed because offset alone is not enough to
22290 uniquely identify the type. A file may have multiple .debug_types sections,
22291 or the type may come from a DWO file. Furthermore, while it's more logical
22292 to use per_cu->section+offset, with Fission the section with the data is in
22293 the DWO file but we don't know that section at the point we need it.
22294 We have to use something in dwarf2_per_cu_data (or the pointer to it)
22295 because we can enter the lookup routine, get_die_type_at_offset, from
22296 outside this file, and thus won't necessarily have PER_CU->cu.
22297 Fortunately, PER_CU is stable for the life of the objfile. */
22299 struct dwarf2_per_cu_offset_and_type
22301 const struct dwarf2_per_cu_data
*per_cu
;
22302 sect_offset offset
;
22306 /* Hash function for a dwarf2_per_cu_offset_and_type. */
22309 per_cu_offset_and_type_hash (const void *item
)
22311 const struct dwarf2_per_cu_offset_and_type
*ofs
22312 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
22314 return (uintptr_t) ofs
->per_cu
+ ofs
->offset
.sect_off
;
22317 /* Equality function for a dwarf2_per_cu_offset_and_type. */
22320 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
22322 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
22323 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
22324 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
22325 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
22327 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
22328 && ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
);
22331 /* Set the type associated with DIE to TYPE. Save it in CU's hash
22332 table if necessary. For convenience, return TYPE.
22334 The DIEs reading must have careful ordering to:
22335 * Not cause infite loops trying to read in DIEs as a prerequisite for
22336 reading current DIE.
22337 * Not trying to dereference contents of still incompletely read in types
22338 while reading in other DIEs.
22339 * Enable referencing still incompletely read in types just by a pointer to
22340 the type without accessing its fields.
22342 Therefore caller should follow these rules:
22343 * Try to fetch any prerequisite types we may need to build this DIE type
22344 before building the type and calling set_die_type.
22345 * After building type call set_die_type for current DIE as soon as
22346 possible before fetching more types to complete the current type.
22347 * Make the type as complete as possible before fetching more types. */
22349 static struct type
*
22350 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
22352 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
22353 struct objfile
*objfile
= cu
->objfile
;
22354 struct attribute
*attr
;
22355 struct dynamic_prop prop
;
22357 /* For Ada types, make sure that the gnat-specific data is always
22358 initialized (if not already set). There are a few types where
22359 we should not be doing so, because the type-specific area is
22360 already used to hold some other piece of info (eg: TYPE_CODE_FLT
22361 where the type-specific area is used to store the floatformat).
22362 But this is not a problem, because the gnat-specific information
22363 is actually not needed for these types. */
22364 if (need_gnat_info (cu
)
22365 && TYPE_CODE (type
) != TYPE_CODE_FUNC
22366 && TYPE_CODE (type
) != TYPE_CODE_FLT
22367 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
22368 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
22369 && TYPE_CODE (type
) != TYPE_CODE_METHOD
22370 && !HAVE_GNAT_AUX_INFO (type
))
22371 INIT_GNAT_SPECIFIC (type
);
22373 /* Read DW_AT_allocated and set in type. */
22374 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
22375 if (attr_form_is_block (attr
))
22377 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
22378 add_dyn_prop (DYN_PROP_ALLOCATED
, prop
, type
, objfile
);
22380 else if (attr
!= NULL
)
22382 complaint (&symfile_complaints
,
22383 _("DW_AT_allocated has the wrong form (%s) at DIE 0x%x"),
22384 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
22385 die
->offset
.sect_off
);
22388 /* Read DW_AT_associated and set in type. */
22389 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
22390 if (attr_form_is_block (attr
))
22392 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
22393 add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
, type
, objfile
);
22395 else if (attr
!= NULL
)
22397 complaint (&symfile_complaints
,
22398 _("DW_AT_associated has the wrong form (%s) at DIE 0x%x"),
22399 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
22400 die
->offset
.sect_off
);
22403 /* Read DW_AT_data_location and set in type. */
22404 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
22405 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
22406 add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
, type
, objfile
);
22408 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
22410 dwarf2_per_objfile
->die_type_hash
=
22411 htab_create_alloc_ex (127,
22412 per_cu_offset_and_type_hash
,
22413 per_cu_offset_and_type_eq
,
22415 &objfile
->objfile_obstack
,
22416 hashtab_obstack_allocate
,
22417 dummy_obstack_deallocate
);
22420 ofs
.per_cu
= cu
->per_cu
;
22421 ofs
.offset
= die
->offset
;
22423 slot
= (struct dwarf2_per_cu_offset_and_type
**)
22424 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
22426 complaint (&symfile_complaints
,
22427 _("A problem internal to GDB: DIE 0x%x has type already set"),
22428 die
->offset
.sect_off
);
22429 *slot
= XOBNEW (&objfile
->objfile_obstack
,
22430 struct dwarf2_per_cu_offset_and_type
);
22435 /* Look up the type for the die at OFFSET in PER_CU in die_type_hash,
22436 or return NULL if the die does not have a saved type. */
22438 static struct type
*
22439 get_die_type_at_offset (sect_offset offset
,
22440 struct dwarf2_per_cu_data
*per_cu
)
22442 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
22444 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
22447 ofs
.per_cu
= per_cu
;
22448 ofs
.offset
= offset
;
22449 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
22450 htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
));
22457 /* Look up the type for DIE in CU in die_type_hash,
22458 or return NULL if DIE does not have a saved type. */
22460 static struct type
*
22461 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22463 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
22466 /* Add a dependence relationship from CU to REF_PER_CU. */
22469 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
22470 struct dwarf2_per_cu_data
*ref_per_cu
)
22474 if (cu
->dependencies
== NULL
)
22476 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
22477 NULL
, &cu
->comp_unit_obstack
,
22478 hashtab_obstack_allocate
,
22479 dummy_obstack_deallocate
);
22481 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
22483 *slot
= ref_per_cu
;
22486 /* Subroutine of dwarf2_mark to pass to htab_traverse.
22487 Set the mark field in every compilation unit in the
22488 cache that we must keep because we are keeping CU. */
22491 dwarf2_mark_helper (void **slot
, void *data
)
22493 struct dwarf2_per_cu_data
*per_cu
;
22495 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
22497 /* cu->dependencies references may not yet have been ever read if QUIT aborts
22498 reading of the chain. As such dependencies remain valid it is not much
22499 useful to track and undo them during QUIT cleanups. */
22500 if (per_cu
->cu
== NULL
)
22503 if (per_cu
->cu
->mark
)
22505 per_cu
->cu
->mark
= 1;
22507 if (per_cu
->cu
->dependencies
!= NULL
)
22508 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
22513 /* Set the mark field in CU and in every other compilation unit in the
22514 cache that we must keep because we are keeping CU. */
22517 dwarf2_mark (struct dwarf2_cu
*cu
)
22522 if (cu
->dependencies
!= NULL
)
22523 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
22527 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
22531 per_cu
->cu
->mark
= 0;
22532 per_cu
= per_cu
->cu
->read_in_chain
;
22536 /* Trivial hash function for partial_die_info: the hash value of a DIE
22537 is its offset in .debug_info for this objfile. */
22540 partial_die_hash (const void *item
)
22542 const struct partial_die_info
*part_die
22543 = (const struct partial_die_info
*) item
;
22545 return part_die
->offset
.sect_off
;
22548 /* Trivial comparison function for partial_die_info structures: two DIEs
22549 are equal if they have the same offset. */
22552 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
22554 const struct partial_die_info
*part_die_lhs
22555 = (const struct partial_die_info
*) item_lhs
;
22556 const struct partial_die_info
*part_die_rhs
22557 = (const struct partial_die_info
*) item_rhs
;
22559 return part_die_lhs
->offset
.sect_off
== part_die_rhs
->offset
.sect_off
;
22562 static struct cmd_list_element
*set_dwarf_cmdlist
;
22563 static struct cmd_list_element
*show_dwarf_cmdlist
;
22566 set_dwarf_cmd (char *args
, int from_tty
)
22568 help_list (set_dwarf_cmdlist
, "maintenance set dwarf ", all_commands
,
22573 show_dwarf_cmd (char *args
, int from_tty
)
22575 cmd_show_list (show_dwarf_cmdlist
, from_tty
, "");
22578 /* Free data associated with OBJFILE, if necessary. */
22581 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
22583 struct dwarf2_per_objfile
*data
= (struct dwarf2_per_objfile
*) d
;
22586 /* Make sure we don't accidentally use dwarf2_per_objfile while
22588 dwarf2_per_objfile
= NULL
;
22590 for (ix
= 0; ix
< data
->n_comp_units
; ++ix
)
22591 VEC_free (dwarf2_per_cu_ptr
, data
->all_comp_units
[ix
]->imported_symtabs
);
22593 for (ix
= 0; ix
< data
->n_type_units
; ++ix
)
22594 VEC_free (dwarf2_per_cu_ptr
,
22595 data
->all_type_units
[ix
]->per_cu
.imported_symtabs
);
22596 xfree (data
->all_type_units
);
22598 VEC_free (dwarf2_section_info_def
, data
->types
);
22600 if (data
->dwo_files
)
22601 free_dwo_files (data
->dwo_files
, objfile
);
22602 if (data
->dwp_file
)
22603 gdb_bfd_unref (data
->dwp_file
->dbfd
);
22605 if (data
->dwz_file
&& data
->dwz_file
->dwz_bfd
)
22606 gdb_bfd_unref (data
->dwz_file
->dwz_bfd
);
22610 /* The "save gdb-index" command. */
22612 /* The contents of the hash table we create when building the string
22614 struct strtab_entry
22616 offset_type offset
;
22620 /* Hash function for a strtab_entry.
22622 Function is used only during write_hash_table so no index format backward
22623 compatibility is needed. */
22626 hash_strtab_entry (const void *e
)
22628 const struct strtab_entry
*entry
= (const struct strtab_entry
*) e
;
22629 return mapped_index_string_hash (INT_MAX
, entry
->str
);
22632 /* Equality function for a strtab_entry. */
22635 eq_strtab_entry (const void *a
, const void *b
)
22637 const struct strtab_entry
*ea
= (const struct strtab_entry
*) a
;
22638 const struct strtab_entry
*eb
= (const struct strtab_entry
*) b
;
22639 return !strcmp (ea
->str
, eb
->str
);
22642 /* Create a strtab_entry hash table. */
22645 create_strtab (void)
22647 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
22648 xfree
, xcalloc
, xfree
);
22651 /* Add a string to the constant pool. Return the string's offset in
22655 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
22658 struct strtab_entry entry
;
22659 struct strtab_entry
*result
;
22662 slot
= htab_find_slot (table
, &entry
, INSERT
);
22664 result
= (struct strtab_entry
*) *slot
;
22667 result
= XNEW (struct strtab_entry
);
22668 result
->offset
= obstack_object_size (cpool
);
22670 obstack_grow_str0 (cpool
, str
);
22673 return result
->offset
;
22676 /* An entry in the symbol table. */
22677 struct symtab_index_entry
22679 /* The name of the symbol. */
22681 /* The offset of the name in the constant pool. */
22682 offset_type index_offset
;
22683 /* A sorted vector of the indices of all the CUs that hold an object
22685 VEC (offset_type
) *cu_indices
;
22688 /* The symbol table. This is a power-of-2-sized hash table. */
22689 struct mapped_symtab
22691 offset_type n_elements
;
22693 struct symtab_index_entry
**data
;
22696 /* Hash function for a symtab_index_entry. */
22699 hash_symtab_entry (const void *e
)
22701 const struct symtab_index_entry
*entry
22702 = (const struct symtab_index_entry
*) e
;
22703 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
22704 sizeof (offset_type
) * VEC_length (offset_type
,
22705 entry
->cu_indices
),
22709 /* Equality function for a symtab_index_entry. */
22712 eq_symtab_entry (const void *a
, const void *b
)
22714 const struct symtab_index_entry
*ea
= (const struct symtab_index_entry
*) a
;
22715 const struct symtab_index_entry
*eb
= (const struct symtab_index_entry
*) b
;
22716 int len
= VEC_length (offset_type
, ea
->cu_indices
);
22717 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
22719 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
22720 VEC_address (offset_type
, eb
->cu_indices
),
22721 sizeof (offset_type
) * len
);
22724 /* Destroy a symtab_index_entry. */
22727 delete_symtab_entry (void *p
)
22729 struct symtab_index_entry
*entry
= (struct symtab_index_entry
*) p
;
22730 VEC_free (offset_type
, entry
->cu_indices
);
22734 /* Create a hash table holding symtab_index_entry objects. */
22737 create_symbol_hash_table (void)
22739 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
22740 delete_symtab_entry
, xcalloc
, xfree
);
22743 /* Create a new mapped symtab object. */
22745 static struct mapped_symtab
*
22746 create_mapped_symtab (void)
22748 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
22749 symtab
->n_elements
= 0;
22750 symtab
->size
= 1024;
22751 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
22755 /* Destroy a mapped_symtab. */
22758 cleanup_mapped_symtab (void *p
)
22760 struct mapped_symtab
*symtab
= (struct mapped_symtab
*) p
;
22761 /* The contents of the array are freed when the other hash table is
22763 xfree (symtab
->data
);
22767 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
22770 Function is used only during write_hash_table so no index format backward
22771 compatibility is needed. */
22773 static struct symtab_index_entry
**
22774 find_slot (struct mapped_symtab
*symtab
, const char *name
)
22776 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
22778 index
= hash
& (symtab
->size
- 1);
22779 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
22783 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
22784 return &symtab
->data
[index
];
22785 index
= (index
+ step
) & (symtab
->size
- 1);
22789 /* Expand SYMTAB's hash table. */
22792 hash_expand (struct mapped_symtab
*symtab
)
22794 offset_type old_size
= symtab
->size
;
22796 struct symtab_index_entry
**old_entries
= symtab
->data
;
22799 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
22801 for (i
= 0; i
< old_size
; ++i
)
22803 if (old_entries
[i
])
22805 struct symtab_index_entry
**slot
= find_slot (symtab
,
22806 old_entries
[i
]->name
);
22807 *slot
= old_entries
[i
];
22811 xfree (old_entries
);
22814 /* Add an entry to SYMTAB. NAME is the name of the symbol.
22815 CU_INDEX is the index of the CU in which the symbol appears.
22816 IS_STATIC is one if the symbol is static, otherwise zero (global). */
22819 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
22820 int is_static
, gdb_index_symbol_kind kind
,
22821 offset_type cu_index
)
22823 struct symtab_index_entry
**slot
;
22824 offset_type cu_index_and_attrs
;
22826 ++symtab
->n_elements
;
22827 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
22828 hash_expand (symtab
);
22830 slot
= find_slot (symtab
, name
);
22833 *slot
= XNEW (struct symtab_index_entry
);
22834 (*slot
)->name
= name
;
22835 /* index_offset is set later. */
22836 (*slot
)->cu_indices
= NULL
;
22839 cu_index_and_attrs
= 0;
22840 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs
, cu_index
);
22841 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs
, is_static
);
22842 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs
, kind
);
22844 /* We don't want to record an index value twice as we want to avoid the
22846 We process all global symbols and then all static symbols
22847 (which would allow us to avoid the duplication by only having to check
22848 the last entry pushed), but a symbol could have multiple kinds in one CU.
22849 To keep things simple we don't worry about the duplication here and
22850 sort and uniqufy the list after we've processed all symbols. */
22851 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index_and_attrs
);
22854 /* qsort helper routine for uniquify_cu_indices. */
22857 offset_type_compare (const void *ap
, const void *bp
)
22859 offset_type a
= *(offset_type
*) ap
;
22860 offset_type b
= *(offset_type
*) bp
;
22862 return (a
> b
) - (b
> a
);
22865 /* Sort and remove duplicates of all symbols' cu_indices lists. */
22868 uniquify_cu_indices (struct mapped_symtab
*symtab
)
22872 for (i
= 0; i
< symtab
->size
; ++i
)
22874 struct symtab_index_entry
*entry
= symtab
->data
[i
];
22877 && entry
->cu_indices
!= NULL
)
22879 unsigned int next_to_insert
, next_to_check
;
22880 offset_type last_value
;
22882 qsort (VEC_address (offset_type
, entry
->cu_indices
),
22883 VEC_length (offset_type
, entry
->cu_indices
),
22884 sizeof (offset_type
), offset_type_compare
);
22886 last_value
= VEC_index (offset_type
, entry
->cu_indices
, 0);
22887 next_to_insert
= 1;
22888 for (next_to_check
= 1;
22889 next_to_check
< VEC_length (offset_type
, entry
->cu_indices
);
22892 if (VEC_index (offset_type
, entry
->cu_indices
, next_to_check
)
22895 last_value
= VEC_index (offset_type
, entry
->cu_indices
,
22897 VEC_replace (offset_type
, entry
->cu_indices
, next_to_insert
,
22902 VEC_truncate (offset_type
, entry
->cu_indices
, next_to_insert
);
22907 /* Add a vector of indices to the constant pool. */
22910 add_indices_to_cpool (htab_t symbol_hash_table
, struct obstack
*cpool
,
22911 struct symtab_index_entry
*entry
)
22915 slot
= htab_find_slot (symbol_hash_table
, entry
, INSERT
);
22918 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
22919 offset_type val
= MAYBE_SWAP (len
);
22924 entry
->index_offset
= obstack_object_size (cpool
);
22926 obstack_grow (cpool
, &val
, sizeof (val
));
22928 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
22931 val
= MAYBE_SWAP (iter
);
22932 obstack_grow (cpool
, &val
, sizeof (val
));
22937 struct symtab_index_entry
*old_entry
22938 = (struct symtab_index_entry
*) *slot
;
22939 entry
->index_offset
= old_entry
->index_offset
;
22942 return entry
->index_offset
;
22945 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
22946 constant pool entries going into the obstack CPOOL. */
22949 write_hash_table (struct mapped_symtab
*symtab
,
22950 struct obstack
*output
, struct obstack
*cpool
)
22953 htab_t symbol_hash_table
;
22956 symbol_hash_table
= create_symbol_hash_table ();
22957 str_table
= create_strtab ();
22959 /* We add all the index vectors to the constant pool first, to
22960 ensure alignment is ok. */
22961 for (i
= 0; i
< symtab
->size
; ++i
)
22963 if (symtab
->data
[i
])
22964 add_indices_to_cpool (symbol_hash_table
, cpool
, symtab
->data
[i
]);
22967 /* Now write out the hash table. */
22968 for (i
= 0; i
< symtab
->size
; ++i
)
22970 offset_type str_off
, vec_off
;
22972 if (symtab
->data
[i
])
22974 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
22975 vec_off
= symtab
->data
[i
]->index_offset
;
22979 /* While 0 is a valid constant pool index, it is not valid
22980 to have 0 for both offsets. */
22985 str_off
= MAYBE_SWAP (str_off
);
22986 vec_off
= MAYBE_SWAP (vec_off
);
22988 obstack_grow (output
, &str_off
, sizeof (str_off
));
22989 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
22992 htab_delete (str_table
);
22993 htab_delete (symbol_hash_table
);
22996 /* Struct to map psymtab to CU index in the index file. */
22997 struct psymtab_cu_index_map
22999 struct partial_symtab
*psymtab
;
23000 unsigned int cu_index
;
23004 hash_psymtab_cu_index (const void *item
)
23006 const struct psymtab_cu_index_map
*map
23007 = (const struct psymtab_cu_index_map
*) item
;
23009 return htab_hash_pointer (map
->psymtab
);
23013 eq_psymtab_cu_index (const void *item_lhs
, const void *item_rhs
)
23015 const struct psymtab_cu_index_map
*lhs
23016 = (const struct psymtab_cu_index_map
*) item_lhs
;
23017 const struct psymtab_cu_index_map
*rhs
23018 = (const struct psymtab_cu_index_map
*) item_rhs
;
23020 return lhs
->psymtab
== rhs
->psymtab
;
23023 /* Helper struct for building the address table. */
23024 struct addrmap_index_data
23026 struct objfile
*objfile
;
23027 struct obstack
*addr_obstack
;
23028 htab_t cu_index_htab
;
23030 /* Non-zero if the previous_* fields are valid.
23031 We can't write an entry until we see the next entry (since it is only then
23032 that we know the end of the entry). */
23033 int previous_valid
;
23034 /* Index of the CU in the table of all CUs in the index file. */
23035 unsigned int previous_cu_index
;
23036 /* Start address of the CU. */
23037 CORE_ADDR previous_cu_start
;
23040 /* Write an address entry to OBSTACK. */
23043 add_address_entry (struct objfile
*objfile
, struct obstack
*obstack
,
23044 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
23046 offset_type cu_index_to_write
;
23048 CORE_ADDR baseaddr
;
23050 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
23052 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
23053 obstack_grow (obstack
, addr
, 8);
23054 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
23055 obstack_grow (obstack
, addr
, 8);
23056 cu_index_to_write
= MAYBE_SWAP (cu_index
);
23057 obstack_grow (obstack
, &cu_index_to_write
, sizeof (offset_type
));
23060 /* Worker function for traversing an addrmap to build the address table. */
23063 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
23065 struct addrmap_index_data
*data
= (struct addrmap_index_data
*) datap
;
23066 struct partial_symtab
*pst
= (struct partial_symtab
*) obj
;
23068 if (data
->previous_valid
)
23069 add_address_entry (data
->objfile
, data
->addr_obstack
,
23070 data
->previous_cu_start
, start_addr
,
23071 data
->previous_cu_index
);
23073 data
->previous_cu_start
= start_addr
;
23076 struct psymtab_cu_index_map find_map
, *map
;
23077 find_map
.psymtab
= pst
;
23078 map
= ((struct psymtab_cu_index_map
*)
23079 htab_find (data
->cu_index_htab
, &find_map
));
23080 gdb_assert (map
!= NULL
);
23081 data
->previous_cu_index
= map
->cu_index
;
23082 data
->previous_valid
= 1;
23085 data
->previous_valid
= 0;
23090 /* Write OBJFILE's address map to OBSTACK.
23091 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
23092 in the index file. */
23095 write_address_map (struct objfile
*objfile
, struct obstack
*obstack
,
23096 htab_t cu_index_htab
)
23098 struct addrmap_index_data addrmap_index_data
;
23100 /* When writing the address table, we have to cope with the fact that
23101 the addrmap iterator only provides the start of a region; we have to
23102 wait until the next invocation to get the start of the next region. */
23104 addrmap_index_data
.objfile
= objfile
;
23105 addrmap_index_data
.addr_obstack
= obstack
;
23106 addrmap_index_data
.cu_index_htab
= cu_index_htab
;
23107 addrmap_index_data
.previous_valid
= 0;
23109 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
23110 &addrmap_index_data
);
23112 /* It's highly unlikely the last entry (end address = 0xff...ff)
23113 is valid, but we should still handle it.
23114 The end address is recorded as the start of the next region, but that
23115 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
23117 if (addrmap_index_data
.previous_valid
)
23118 add_address_entry (objfile
, obstack
,
23119 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
23120 addrmap_index_data
.previous_cu_index
);
23123 /* Return the symbol kind of PSYM. */
23125 static gdb_index_symbol_kind
23126 symbol_kind (struct partial_symbol
*psym
)
23128 domain_enum domain
= PSYMBOL_DOMAIN (psym
);
23129 enum address_class aclass
= PSYMBOL_CLASS (psym
);
23137 return GDB_INDEX_SYMBOL_KIND_FUNCTION
;
23139 return GDB_INDEX_SYMBOL_KIND_TYPE
;
23141 case LOC_CONST_BYTES
:
23142 case LOC_OPTIMIZED_OUT
:
23144 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
23146 /* Note: It's currently impossible to recognize psyms as enum values
23147 short of reading the type info. For now punt. */
23148 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
23150 /* There are other LOC_FOO values that one might want to classify
23151 as variables, but dwarf2read.c doesn't currently use them. */
23152 return GDB_INDEX_SYMBOL_KIND_OTHER
;
23154 case STRUCT_DOMAIN
:
23155 return GDB_INDEX_SYMBOL_KIND_TYPE
;
23157 return GDB_INDEX_SYMBOL_KIND_OTHER
;
23161 /* Add a list of partial symbols to SYMTAB. */
23164 write_psymbols (struct mapped_symtab
*symtab
,
23166 struct partial_symbol
**psymp
,
23168 offset_type cu_index
,
23171 for (; count
-- > 0; ++psymp
)
23173 struct partial_symbol
*psym
= *psymp
;
23176 if (SYMBOL_LANGUAGE (psym
) == language_ada
)
23177 error (_("Ada is not currently supported by the index"));
23179 /* Only add a given psymbol once. */
23180 slot
= htab_find_slot (psyms_seen
, psym
, INSERT
);
23183 gdb_index_symbol_kind kind
= symbol_kind (psym
);
23186 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (psym
),
23187 is_static
, kind
, cu_index
);
23192 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
23193 exception if there is an error. */
23196 write_obstack (FILE *file
, struct obstack
*obstack
)
23198 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
23200 != obstack_object_size (obstack
))
23201 error (_("couldn't data write to file"));
23204 /* Unlink a file if the argument is not NULL. */
23207 unlink_if_set (void *p
)
23209 char **filename
= (char **) p
;
23211 unlink (*filename
);
23214 /* A helper struct used when iterating over debug_types. */
23215 struct signatured_type_index_data
23217 struct objfile
*objfile
;
23218 struct mapped_symtab
*symtab
;
23219 struct obstack
*types_list
;
23224 /* A helper function that writes a single signatured_type to an
23228 write_one_signatured_type (void **slot
, void *d
)
23230 struct signatured_type_index_data
*info
23231 = (struct signatured_type_index_data
*) d
;
23232 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
23233 struct partial_symtab
*psymtab
= entry
->per_cu
.v
.psymtab
;
23236 write_psymbols (info
->symtab
,
23238 info
->objfile
->global_psymbols
.list
23239 + psymtab
->globals_offset
,
23240 psymtab
->n_global_syms
, info
->cu_index
,
23242 write_psymbols (info
->symtab
,
23244 info
->objfile
->static_psymbols
.list
23245 + psymtab
->statics_offset
,
23246 psymtab
->n_static_syms
, info
->cu_index
,
23249 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23250 entry
->per_cu
.offset
.sect_off
);
23251 obstack_grow (info
->types_list
, val
, 8);
23252 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23253 entry
->type_offset_in_tu
.cu_off
);
23254 obstack_grow (info
->types_list
, val
, 8);
23255 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
23256 obstack_grow (info
->types_list
, val
, 8);
23263 /* Recurse into all "included" dependencies and write their symbols as
23264 if they appeared in this psymtab. */
23267 recursively_write_psymbols (struct objfile
*objfile
,
23268 struct partial_symtab
*psymtab
,
23269 struct mapped_symtab
*symtab
,
23271 offset_type cu_index
)
23275 for (i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
23276 if (psymtab
->dependencies
[i
]->user
!= NULL
)
23277 recursively_write_psymbols (objfile
, psymtab
->dependencies
[i
],
23278 symtab
, psyms_seen
, cu_index
);
23280 write_psymbols (symtab
,
23282 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
23283 psymtab
->n_global_syms
, cu_index
,
23285 write_psymbols (symtab
,
23287 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
23288 psymtab
->n_static_syms
, cu_index
,
23292 /* Create an index file for OBJFILE in the directory DIR. */
23295 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
23297 struct cleanup
*cleanup
;
23298 char *filename
, *cleanup_filename
;
23299 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
23300 struct obstack cu_list
, types_cu_list
;
23303 struct mapped_symtab
*symtab
;
23304 offset_type val
, size_of_contents
, total_len
;
23307 htab_t cu_index_htab
;
23308 struct psymtab_cu_index_map
*psymtab_cu_index_map
;
23310 if (dwarf2_per_objfile
->using_index
)
23311 error (_("Cannot use an index to create the index"));
23313 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
23314 error (_("Cannot make an index when the file has multiple .debug_types sections"));
23316 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
23319 if (stat (objfile_name (objfile
), &st
) < 0)
23320 perror_with_name (objfile_name (objfile
));
23322 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile_name (objfile
)),
23323 INDEX_SUFFIX
, (char *) NULL
);
23324 cleanup
= make_cleanup (xfree
, filename
);
23326 out_file
= gdb_fopen_cloexec (filename
, "wb");
23328 error (_("Can't open `%s' for writing"), filename
);
23330 cleanup_filename
= filename
;
23331 make_cleanup (unlink_if_set
, &cleanup_filename
);
23333 symtab
= create_mapped_symtab ();
23334 make_cleanup (cleanup_mapped_symtab
, symtab
);
23336 obstack_init (&addr_obstack
);
23337 make_cleanup_obstack_free (&addr_obstack
);
23339 obstack_init (&cu_list
);
23340 make_cleanup_obstack_free (&cu_list
);
23342 obstack_init (&types_cu_list
);
23343 make_cleanup_obstack_free (&types_cu_list
);
23345 psyms_seen
= htab_create_alloc (100, htab_hash_pointer
, htab_eq_pointer
,
23346 NULL
, xcalloc
, xfree
);
23347 make_cleanup_htab_delete (psyms_seen
);
23349 /* While we're scanning CU's create a table that maps a psymtab pointer
23350 (which is what addrmap records) to its index (which is what is recorded
23351 in the index file). This will later be needed to write the address
23353 cu_index_htab
= htab_create_alloc (100,
23354 hash_psymtab_cu_index
,
23355 eq_psymtab_cu_index
,
23356 NULL
, xcalloc
, xfree
);
23357 make_cleanup_htab_delete (cu_index_htab
);
23358 psymtab_cu_index_map
= XNEWVEC (struct psymtab_cu_index_map
,
23359 dwarf2_per_objfile
->n_comp_units
);
23360 make_cleanup (xfree
, psymtab_cu_index_map
);
23362 /* The CU list is already sorted, so we don't need to do additional
23363 work here. Also, the debug_types entries do not appear in
23364 all_comp_units, but only in their own hash table. */
23365 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
23367 struct dwarf2_per_cu_data
*per_cu
23368 = dwarf2_per_objfile
->all_comp_units
[i
];
23369 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
23371 struct psymtab_cu_index_map
*map
;
23374 /* CU of a shared file from 'dwz -m' may be unused by this main file.
23375 It may be referenced from a local scope but in such case it does not
23376 need to be present in .gdb_index. */
23377 if (psymtab
== NULL
)
23380 if (psymtab
->user
== NULL
)
23381 recursively_write_psymbols (objfile
, psymtab
, symtab
, psyms_seen
, i
);
23383 map
= &psymtab_cu_index_map
[i
];
23384 map
->psymtab
= psymtab
;
23386 slot
= htab_find_slot (cu_index_htab
, map
, INSERT
);
23387 gdb_assert (slot
!= NULL
);
23388 gdb_assert (*slot
== NULL
);
23391 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23392 per_cu
->offset
.sect_off
);
23393 obstack_grow (&cu_list
, val
, 8);
23394 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
23395 obstack_grow (&cu_list
, val
, 8);
23398 /* Dump the address map. */
23399 write_address_map (objfile
, &addr_obstack
, cu_index_htab
);
23401 /* Write out the .debug_type entries, if any. */
23402 if (dwarf2_per_objfile
->signatured_types
)
23404 struct signatured_type_index_data sig_data
;
23406 sig_data
.objfile
= objfile
;
23407 sig_data
.symtab
= symtab
;
23408 sig_data
.types_list
= &types_cu_list
;
23409 sig_data
.psyms_seen
= psyms_seen
;
23410 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
23411 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
23412 write_one_signatured_type
, &sig_data
);
23415 /* Now that we've processed all symbols we can shrink their cu_indices
23417 uniquify_cu_indices (symtab
);
23419 obstack_init (&constant_pool
);
23420 make_cleanup_obstack_free (&constant_pool
);
23421 obstack_init (&symtab_obstack
);
23422 make_cleanup_obstack_free (&symtab_obstack
);
23423 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
23425 obstack_init (&contents
);
23426 make_cleanup_obstack_free (&contents
);
23427 size_of_contents
= 6 * sizeof (offset_type
);
23428 total_len
= size_of_contents
;
23430 /* The version number. */
23431 val
= MAYBE_SWAP (8);
23432 obstack_grow (&contents
, &val
, sizeof (val
));
23434 /* The offset of the CU list from the start of the file. */
23435 val
= MAYBE_SWAP (total_len
);
23436 obstack_grow (&contents
, &val
, sizeof (val
));
23437 total_len
+= obstack_object_size (&cu_list
);
23439 /* The offset of the types CU list from the start of the file. */
23440 val
= MAYBE_SWAP (total_len
);
23441 obstack_grow (&contents
, &val
, sizeof (val
));
23442 total_len
+= obstack_object_size (&types_cu_list
);
23444 /* The offset of the address table from the start of the file. */
23445 val
= MAYBE_SWAP (total_len
);
23446 obstack_grow (&contents
, &val
, sizeof (val
));
23447 total_len
+= obstack_object_size (&addr_obstack
);
23449 /* The offset of the symbol table from the start of the file. */
23450 val
= MAYBE_SWAP (total_len
);
23451 obstack_grow (&contents
, &val
, sizeof (val
));
23452 total_len
+= obstack_object_size (&symtab_obstack
);
23454 /* The offset of the constant pool from the start of the file. */
23455 val
= MAYBE_SWAP (total_len
);
23456 obstack_grow (&contents
, &val
, sizeof (val
));
23457 total_len
+= obstack_object_size (&constant_pool
);
23459 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
23461 write_obstack (out_file
, &contents
);
23462 write_obstack (out_file
, &cu_list
);
23463 write_obstack (out_file
, &types_cu_list
);
23464 write_obstack (out_file
, &addr_obstack
);
23465 write_obstack (out_file
, &symtab_obstack
);
23466 write_obstack (out_file
, &constant_pool
);
23470 /* We want to keep the file, so we set cleanup_filename to NULL
23471 here. See unlink_if_set. */
23472 cleanup_filename
= NULL
;
23474 do_cleanups (cleanup
);
23477 /* Implementation of the `save gdb-index' command.
23479 Note that the file format used by this command is documented in the
23480 GDB manual. Any changes here must be documented there. */
23483 save_gdb_index_command (char *arg
, int from_tty
)
23485 struct objfile
*objfile
;
23488 error (_("usage: save gdb-index DIRECTORY"));
23490 ALL_OBJFILES (objfile
)
23494 /* If the objfile does not correspond to an actual file, skip it. */
23495 if (stat (objfile_name (objfile
), &st
) < 0)
23499 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
23500 dwarf2_objfile_data_key
);
23501 if (dwarf2_per_objfile
)
23506 write_psymtabs_to_index (objfile
, arg
);
23508 CATCH (except
, RETURN_MASK_ERROR
)
23510 exception_fprintf (gdb_stderr
, except
,
23511 _("Error while writing index for `%s': "),
23512 objfile_name (objfile
));
23521 int dwarf_always_disassemble
;
23524 show_dwarf_always_disassemble (struct ui_file
*file
, int from_tty
,
23525 struct cmd_list_element
*c
, const char *value
)
23527 fprintf_filtered (file
,
23528 _("Whether to always disassemble "
23529 "DWARF expressions is %s.\n"),
23534 show_check_physname (struct ui_file
*file
, int from_tty
,
23535 struct cmd_list_element
*c
, const char *value
)
23537 fprintf_filtered (file
,
23538 _("Whether to check \"physname\" is %s.\n"),
23542 void _initialize_dwarf2_read (void);
23545 _initialize_dwarf2_read (void)
23547 struct cmd_list_element
*c
;
23549 dwarf2_objfile_data_key
23550 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
23552 add_prefix_cmd ("dwarf", class_maintenance
, set_dwarf_cmd
, _("\
23553 Set DWARF specific variables.\n\
23554 Configure DWARF variables such as the cache size"),
23555 &set_dwarf_cmdlist
, "maintenance set dwarf ",
23556 0/*allow-unknown*/, &maintenance_set_cmdlist
);
23558 add_prefix_cmd ("dwarf", class_maintenance
, show_dwarf_cmd
, _("\
23559 Show DWARF specific variables\n\
23560 Show DWARF variables such as the cache size"),
23561 &show_dwarf_cmdlist
, "maintenance show dwarf ",
23562 0/*allow-unknown*/, &maintenance_show_cmdlist
);
23564 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
23565 &dwarf_max_cache_age
, _("\
23566 Set the upper bound on the age of cached DWARF compilation units."), _("\
23567 Show the upper bound on the age of cached DWARF compilation units."), _("\
23568 A higher limit means that cached compilation units will be stored\n\
23569 in memory longer, and more total memory will be used. Zero disables\n\
23570 caching, which can slow down startup."),
23572 show_dwarf_max_cache_age
,
23573 &set_dwarf_cmdlist
,
23574 &show_dwarf_cmdlist
);
23576 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
23577 &dwarf_always_disassemble
, _("\
23578 Set whether `info address' always disassembles DWARF expressions."), _("\
23579 Show whether `info address' always disassembles DWARF expressions."), _("\
23580 When enabled, DWARF expressions are always printed in an assembly-like\n\
23581 syntax. When disabled, expressions will be printed in a more\n\
23582 conversational style, when possible."),
23584 show_dwarf_always_disassemble
,
23585 &set_dwarf_cmdlist
,
23586 &show_dwarf_cmdlist
);
23588 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
23589 Set debugging of the DWARF reader."), _("\
23590 Show debugging of the DWARF reader."), _("\
23591 When enabled (non-zero), debugging messages are printed during DWARF\n\
23592 reading and symtab expansion. A value of 1 (one) provides basic\n\
23593 information. A value greater than 1 provides more verbose information."),
23596 &setdebuglist
, &showdebuglist
);
23598 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
23599 Set debugging of the DWARF DIE reader."), _("\
23600 Show debugging of the DWARF DIE reader."), _("\
23601 When enabled (non-zero), DIEs are dumped after they are read in.\n\
23602 The value is the maximum depth to print."),
23605 &setdebuglist
, &showdebuglist
);
23607 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
23608 Set debugging of the dwarf line reader."), _("\
23609 Show debugging of the dwarf line reader."), _("\
23610 When enabled (non-zero), line number entries are dumped as they are read in.\n\
23611 A value of 1 (one) provides basic information.\n\
23612 A value greater than 1 provides more verbose information."),
23615 &setdebuglist
, &showdebuglist
);
23617 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
23618 Set cross-checking of \"physname\" code against demangler."), _("\
23619 Show cross-checking of \"physname\" code against demangler."), _("\
23620 When enabled, GDB's internal \"physname\" code is checked against\n\
23622 NULL
, show_check_physname
,
23623 &setdebuglist
, &showdebuglist
);
23625 add_setshow_boolean_cmd ("use-deprecated-index-sections",
23626 no_class
, &use_deprecated_index_sections
, _("\
23627 Set whether to use deprecated gdb_index sections."), _("\
23628 Show whether to use deprecated gdb_index sections."), _("\
23629 When enabled, deprecated .gdb_index sections are used anyway.\n\
23630 Normally they are ignored either because of a missing feature or\n\
23631 performance issue.\n\
23632 Warning: This option must be enabled before gdb reads the file."),
23635 &setlist
, &showlist
);
23637 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
23639 Save a gdb-index file.\n\
23640 Usage: save gdb-index DIRECTORY"),
23642 set_cmd_completer (c
, filename_completer
);
23644 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23645 &dwarf2_locexpr_funcs
);
23646 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23647 &dwarf2_loclist_funcs
);
23649 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23650 &dwarf2_block_frame_base_locexpr_funcs
);
23651 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23652 &dwarf2_block_frame_base_loclist_funcs
);