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 static int dwarf2_get_pc_bounds (struct die_info
*,
1610 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*,
1611 struct partial_symtab
*);
1613 static void get_scope_pc_bounds (struct die_info
*,
1614 CORE_ADDR
*, CORE_ADDR
*,
1615 struct dwarf2_cu
*);
1617 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1618 CORE_ADDR
, struct dwarf2_cu
*);
1620 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1621 struct dwarf2_cu
*);
1623 static void dwarf2_attach_fields_to_type (struct field_info
*,
1624 struct type
*, struct dwarf2_cu
*);
1626 static void dwarf2_add_member_fn (struct field_info
*,
1627 struct die_info
*, struct type
*,
1628 struct dwarf2_cu
*);
1630 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1632 struct dwarf2_cu
*);
1634 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1636 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1638 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1640 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1642 static struct using_direct
**using_directives (enum language
);
1644 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1646 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1648 static struct type
*read_module_type (struct die_info
*die
,
1649 struct dwarf2_cu
*cu
);
1651 static const char *namespace_name (struct die_info
*die
,
1652 int *is_anonymous
, struct dwarf2_cu
*);
1654 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1656 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1658 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1659 struct dwarf2_cu
*);
1661 static struct die_info
*read_die_and_siblings_1
1662 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1665 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1666 const gdb_byte
*info_ptr
,
1667 const gdb_byte
**new_info_ptr
,
1668 struct die_info
*parent
);
1670 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1671 struct die_info
**, const gdb_byte
*,
1674 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1675 struct die_info
**, const gdb_byte
*,
1678 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1680 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1683 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1685 static const char *dwarf2_full_name (const char *name
,
1686 struct die_info
*die
,
1687 struct dwarf2_cu
*cu
);
1689 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1690 struct dwarf2_cu
*cu
);
1692 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1693 struct dwarf2_cu
**);
1695 static const char *dwarf_tag_name (unsigned int);
1697 static const char *dwarf_attr_name (unsigned int);
1699 static const char *dwarf_form_name (unsigned int);
1701 static char *dwarf_bool_name (unsigned int);
1703 static const char *dwarf_type_encoding_name (unsigned int);
1705 static struct die_info
*sibling_die (struct die_info
*);
1707 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1709 static void dump_die_for_error (struct die_info
*);
1711 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1714 /*static*/ void dump_die (struct die_info
*, int max_level
);
1716 static void store_in_ref_table (struct die_info
*,
1717 struct dwarf2_cu
*);
1719 static sect_offset
dwarf2_get_ref_die_offset (const struct attribute
*);
1721 static LONGEST
dwarf2_get_attr_constant_value (const struct attribute
*, int);
1723 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1724 const struct attribute
*,
1725 struct dwarf2_cu
**);
1727 static struct die_info
*follow_die_ref (struct die_info
*,
1728 const struct attribute
*,
1729 struct dwarf2_cu
**);
1731 static struct die_info
*follow_die_sig (struct die_info
*,
1732 const struct attribute
*,
1733 struct dwarf2_cu
**);
1735 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1736 struct dwarf2_cu
*);
1738 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1739 const struct attribute
*,
1740 struct dwarf2_cu
*);
1742 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1744 static void read_signatured_type (struct signatured_type
*);
1746 static int attr_to_dynamic_prop (const struct attribute
*attr
,
1747 struct die_info
*die
, struct dwarf2_cu
*cu
,
1748 struct dynamic_prop
*prop
);
1750 /* memory allocation interface */
1752 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1754 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1756 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1758 static int attr_form_is_block (const struct attribute
*);
1760 static int attr_form_is_section_offset (const struct attribute
*);
1762 static int attr_form_is_constant (const struct attribute
*);
1764 static int attr_form_is_ref (const struct attribute
*);
1766 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1767 struct dwarf2_loclist_baton
*baton
,
1768 const struct attribute
*attr
);
1770 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1772 struct dwarf2_cu
*cu
,
1775 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1776 const gdb_byte
*info_ptr
,
1777 struct abbrev_info
*abbrev
);
1779 static void free_stack_comp_unit (void *);
1781 static hashval_t
partial_die_hash (const void *item
);
1783 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1785 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1786 (sect_offset offset
, unsigned int offset_in_dwz
, struct objfile
*objfile
);
1788 static void init_one_comp_unit (struct dwarf2_cu
*cu
,
1789 struct dwarf2_per_cu_data
*per_cu
);
1791 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1792 struct die_info
*comp_unit_die
,
1793 enum language pretend_language
);
1795 static void free_heap_comp_unit (void *);
1797 static void free_cached_comp_units (void *);
1799 static void age_cached_comp_units (void);
1801 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1803 static struct type
*set_die_type (struct die_info
*, struct type
*,
1804 struct dwarf2_cu
*);
1806 static void create_all_comp_units (struct objfile
*);
1808 static int create_all_type_units (struct objfile
*);
1810 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1813 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1816 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1819 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1820 struct dwarf2_per_cu_data
*);
1822 static void dwarf2_mark (struct dwarf2_cu
*);
1824 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1826 static struct type
*get_die_type_at_offset (sect_offset
,
1827 struct dwarf2_per_cu_data
*);
1829 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1831 static void dwarf2_release_queue (void *dummy
);
1833 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1834 enum language pretend_language
);
1836 static void process_queue (void);
1838 static void find_file_and_directory (struct die_info
*die
,
1839 struct dwarf2_cu
*cu
,
1840 const char **name
, const char **comp_dir
);
1842 static char *file_full_name (int file
, struct line_header
*lh
,
1843 const char *comp_dir
);
1845 static const gdb_byte
*read_and_check_comp_unit_head
1846 (struct comp_unit_head
*header
,
1847 struct dwarf2_section_info
*section
,
1848 struct dwarf2_section_info
*abbrev_section
, const gdb_byte
*info_ptr
,
1849 int is_debug_types_section
);
1851 static void init_cutu_and_read_dies
1852 (struct dwarf2_per_cu_data
*this_cu
, struct abbrev_table
*abbrev_table
,
1853 int use_existing_cu
, int keep
,
1854 die_reader_func_ftype
*die_reader_func
, void *data
);
1856 static void init_cutu_and_read_dies_simple
1857 (struct dwarf2_per_cu_data
*this_cu
,
1858 die_reader_func_ftype
*die_reader_func
, void *data
);
1860 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1862 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
1864 static struct dwo_unit
*lookup_dwo_unit_in_dwp
1865 (struct dwp_file
*dwp_file
, const char *comp_dir
,
1866 ULONGEST signature
, int is_debug_types
);
1868 static struct dwp_file
*get_dwp_file (void);
1870 static struct dwo_unit
*lookup_dwo_comp_unit
1871 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
1873 static struct dwo_unit
*lookup_dwo_type_unit
1874 (struct signatured_type
*, const char *, const char *);
1876 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
1878 static void free_dwo_file_cleanup (void *);
1880 static void process_cu_includes (void);
1882 static void check_producer (struct dwarf2_cu
*cu
);
1884 static void free_line_header_voidp (void *arg
);
1886 /* Various complaints about symbol reading that don't abort the process. */
1889 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
1891 complaint (&symfile_complaints
,
1892 _("statement list doesn't fit in .debug_line section"));
1896 dwarf2_debug_line_missing_file_complaint (void)
1898 complaint (&symfile_complaints
,
1899 _(".debug_line section has line data without a file"));
1903 dwarf2_debug_line_missing_end_sequence_complaint (void)
1905 complaint (&symfile_complaints
,
1906 _(".debug_line section has line "
1907 "program sequence without an end"));
1911 dwarf2_complex_location_expr_complaint (void)
1913 complaint (&symfile_complaints
, _("location expression too complex"));
1917 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
1920 complaint (&symfile_complaints
,
1921 _("const value length mismatch for '%s', got %d, expected %d"),
1926 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
1928 complaint (&symfile_complaints
,
1929 _("debug info runs off end of %s section"
1931 get_section_name (section
),
1932 get_section_file_name (section
));
1936 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
1938 complaint (&symfile_complaints
,
1939 _("macro debug info contains a "
1940 "malformed macro definition:\n`%s'"),
1945 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
1947 complaint (&symfile_complaints
,
1948 _("invalid attribute class or form for '%s' in '%s'"),
1952 /* Hash function for line_header_hash. */
1955 line_header_hash (const struct line_header
*ofs
)
1957 return ofs
->offset
.sect_off
^ ofs
->offset_in_dwz
;
1960 /* Hash function for htab_create_alloc_ex for line_header_hash. */
1963 line_header_hash_voidp (const void *item
)
1965 const struct line_header
*ofs
= (const struct line_header
*) item
;
1967 return line_header_hash (ofs
);
1970 /* Equality function for line_header_hash. */
1973 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
1975 const struct line_header
*ofs_lhs
= (const struct line_header
*) item_lhs
;
1976 const struct line_header
*ofs_rhs
= (const struct line_header
*) item_rhs
;
1978 return (ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
1979 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
1985 /* Convert VALUE between big- and little-endian. */
1987 byte_swap (offset_type value
)
1991 result
= (value
& 0xff) << 24;
1992 result
|= (value
& 0xff00) << 8;
1993 result
|= (value
& 0xff0000) >> 8;
1994 result
|= (value
& 0xff000000) >> 24;
1998 #define MAYBE_SWAP(V) byte_swap (V)
2001 #define MAYBE_SWAP(V) (V)
2002 #endif /* WORDS_BIGENDIAN */
2004 /* Read the given attribute value as an address, taking the attribute's
2005 form into account. */
2008 attr_value_as_address (struct attribute
*attr
)
2012 if (attr
->form
!= DW_FORM_addr
&& attr
->form
!= DW_FORM_GNU_addr_index
)
2014 /* Aside from a few clearly defined exceptions, attributes that
2015 contain an address must always be in DW_FORM_addr form.
2016 Unfortunately, some compilers happen to be violating this
2017 requirement by encoding addresses using other forms, such
2018 as DW_FORM_data4 for example. For those broken compilers,
2019 we try to do our best, without any guarantee of success,
2020 to interpret the address correctly. It would also be nice
2021 to generate a complaint, but that would require us to maintain
2022 a list of legitimate cases where a non-address form is allowed,
2023 as well as update callers to pass in at least the CU's DWARF
2024 version. This is more overhead than what we're willing to
2025 expand for a pretty rare case. */
2026 addr
= DW_UNSND (attr
);
2029 addr
= DW_ADDR (attr
);
2034 /* The suffix for an index file. */
2035 #define INDEX_SUFFIX ".gdb-index"
2037 /* Try to locate the sections we need for DWARF 2 debugging
2038 information and return true if we have enough to do something.
2039 NAMES points to the dwarf2 section names, or is NULL if the standard
2040 ELF names are used. */
2043 dwarf2_has_info (struct objfile
*objfile
,
2044 const struct dwarf2_debug_sections
*names
)
2046 dwarf2_per_objfile
= ((struct dwarf2_per_objfile
*)
2047 objfile_data (objfile
, dwarf2_objfile_data_key
));
2048 if (!dwarf2_per_objfile
)
2050 /* Initialize per-objfile state. */
2051 struct dwarf2_per_objfile
*data
2052 = XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_per_objfile
);
2054 memset (data
, 0, sizeof (*data
));
2055 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
2056 dwarf2_per_objfile
= data
;
2058 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
,
2060 dwarf2_per_objfile
->objfile
= objfile
;
2062 return (!dwarf2_per_objfile
->info
.is_virtual
2063 && dwarf2_per_objfile
->info
.s
.section
!= NULL
2064 && !dwarf2_per_objfile
->abbrev
.is_virtual
2065 && dwarf2_per_objfile
->abbrev
.s
.section
!= NULL
);
2068 /* Return the containing section of virtual section SECTION. */
2070 static struct dwarf2_section_info
*
2071 get_containing_section (const struct dwarf2_section_info
*section
)
2073 gdb_assert (section
->is_virtual
);
2074 return section
->s
.containing_section
;
2077 /* Return the bfd owner of SECTION. */
2080 get_section_bfd_owner (const struct dwarf2_section_info
*section
)
2082 if (section
->is_virtual
)
2084 section
= get_containing_section (section
);
2085 gdb_assert (!section
->is_virtual
);
2087 return section
->s
.section
->owner
;
2090 /* Return the bfd section of SECTION.
2091 Returns NULL if the section is not present. */
2094 get_section_bfd_section (const struct dwarf2_section_info
*section
)
2096 if (section
->is_virtual
)
2098 section
= get_containing_section (section
);
2099 gdb_assert (!section
->is_virtual
);
2101 return section
->s
.section
;
2104 /* Return the name of SECTION. */
2107 get_section_name (const struct dwarf2_section_info
*section
)
2109 asection
*sectp
= get_section_bfd_section (section
);
2111 gdb_assert (sectp
!= NULL
);
2112 return bfd_section_name (get_section_bfd_owner (section
), sectp
);
2115 /* Return the name of the file SECTION is in. */
2118 get_section_file_name (const struct dwarf2_section_info
*section
)
2120 bfd
*abfd
= get_section_bfd_owner (section
);
2122 return bfd_get_filename (abfd
);
2125 /* Return the id of SECTION.
2126 Returns 0 if SECTION doesn't exist. */
2129 get_section_id (const struct dwarf2_section_info
*section
)
2131 asection
*sectp
= get_section_bfd_section (section
);
2138 /* Return the flags of SECTION.
2139 SECTION (or containing section if this is a virtual section) must exist. */
2142 get_section_flags (const struct dwarf2_section_info
*section
)
2144 asection
*sectp
= get_section_bfd_section (section
);
2146 gdb_assert (sectp
!= NULL
);
2147 return bfd_get_section_flags (sectp
->owner
, sectp
);
2150 /* When loading sections, we look either for uncompressed section or for
2151 compressed section names. */
2154 section_is_p (const char *section_name
,
2155 const struct dwarf2_section_names
*names
)
2157 if (names
->normal
!= NULL
2158 && strcmp (section_name
, names
->normal
) == 0)
2160 if (names
->compressed
!= NULL
2161 && strcmp (section_name
, names
->compressed
) == 0)
2166 /* This function is mapped across the sections and remembers the
2167 offset and size of each of the debugging sections we are interested
2171 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *vnames
)
2173 const struct dwarf2_debug_sections
*names
;
2174 flagword aflag
= bfd_get_section_flags (abfd
, sectp
);
2177 names
= &dwarf2_elf_names
;
2179 names
= (const struct dwarf2_debug_sections
*) vnames
;
2181 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
2184 else if (section_is_p (sectp
->name
, &names
->info
))
2186 dwarf2_per_objfile
->info
.s
.section
= sectp
;
2187 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
2189 else if (section_is_p (sectp
->name
, &names
->abbrev
))
2191 dwarf2_per_objfile
->abbrev
.s
.section
= sectp
;
2192 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
2194 else if (section_is_p (sectp
->name
, &names
->line
))
2196 dwarf2_per_objfile
->line
.s
.section
= sectp
;
2197 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
2199 else if (section_is_p (sectp
->name
, &names
->loc
))
2201 dwarf2_per_objfile
->loc
.s
.section
= sectp
;
2202 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
2204 else if (section_is_p (sectp
->name
, &names
->macinfo
))
2206 dwarf2_per_objfile
->macinfo
.s
.section
= sectp
;
2207 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
2209 else if (section_is_p (sectp
->name
, &names
->macro
))
2211 dwarf2_per_objfile
->macro
.s
.section
= sectp
;
2212 dwarf2_per_objfile
->macro
.size
= bfd_get_section_size (sectp
);
2214 else if (section_is_p (sectp
->name
, &names
->str
))
2216 dwarf2_per_objfile
->str
.s
.section
= sectp
;
2217 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
2219 else if (section_is_p (sectp
->name
, &names
->addr
))
2221 dwarf2_per_objfile
->addr
.s
.section
= sectp
;
2222 dwarf2_per_objfile
->addr
.size
= bfd_get_section_size (sectp
);
2224 else if (section_is_p (sectp
->name
, &names
->frame
))
2226 dwarf2_per_objfile
->frame
.s
.section
= sectp
;
2227 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
2229 else if (section_is_p (sectp
->name
, &names
->eh_frame
))
2231 dwarf2_per_objfile
->eh_frame
.s
.section
= sectp
;
2232 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
2234 else if (section_is_p (sectp
->name
, &names
->ranges
))
2236 dwarf2_per_objfile
->ranges
.s
.section
= sectp
;
2237 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
2239 else if (section_is_p (sectp
->name
, &names
->types
))
2241 struct dwarf2_section_info type_section
;
2243 memset (&type_section
, 0, sizeof (type_section
));
2244 type_section
.s
.section
= sectp
;
2245 type_section
.size
= bfd_get_section_size (sectp
);
2247 VEC_safe_push (dwarf2_section_info_def
, dwarf2_per_objfile
->types
,
2250 else if (section_is_p (sectp
->name
, &names
->gdb_index
))
2252 dwarf2_per_objfile
->gdb_index
.s
.section
= sectp
;
2253 dwarf2_per_objfile
->gdb_index
.size
= bfd_get_section_size (sectp
);
2256 if ((bfd_get_section_flags (abfd
, sectp
) & (SEC_LOAD
| SEC_ALLOC
))
2257 && bfd_section_vma (abfd
, sectp
) == 0)
2258 dwarf2_per_objfile
->has_section_at_zero
= 1;
2261 /* A helper function that decides whether a section is empty,
2265 dwarf2_section_empty_p (const struct dwarf2_section_info
*section
)
2267 if (section
->is_virtual
)
2268 return section
->size
== 0;
2269 return section
->s
.section
== NULL
|| section
->size
== 0;
2272 /* Read the contents of the section INFO.
2273 OBJFILE is the main object file, but not necessarily the file where
2274 the section comes from. E.g., for DWO files the bfd of INFO is the bfd
2276 If the section is compressed, uncompress it before returning. */
2279 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
2283 gdb_byte
*buf
, *retbuf
;
2287 info
->buffer
= NULL
;
2290 if (dwarf2_section_empty_p (info
))
2293 sectp
= get_section_bfd_section (info
);
2295 /* If this is a virtual section we need to read in the real one first. */
2296 if (info
->is_virtual
)
2298 struct dwarf2_section_info
*containing_section
=
2299 get_containing_section (info
);
2301 gdb_assert (sectp
!= NULL
);
2302 if ((sectp
->flags
& SEC_RELOC
) != 0)
2304 error (_("Dwarf Error: DWP format V2 with relocations is not"
2305 " supported in section %s [in module %s]"),
2306 get_section_name (info
), get_section_file_name (info
));
2308 dwarf2_read_section (objfile
, containing_section
);
2309 /* Other code should have already caught virtual sections that don't
2311 gdb_assert (info
->virtual_offset
+ info
->size
2312 <= containing_section
->size
);
2313 /* If the real section is empty or there was a problem reading the
2314 section we shouldn't get here. */
2315 gdb_assert (containing_section
->buffer
!= NULL
);
2316 info
->buffer
= containing_section
->buffer
+ info
->virtual_offset
;
2320 /* If the section has relocations, we must read it ourselves.
2321 Otherwise we attach it to the BFD. */
2322 if ((sectp
->flags
& SEC_RELOC
) == 0)
2324 info
->buffer
= gdb_bfd_map_section (sectp
, &info
->size
);
2328 buf
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
2331 /* When debugging .o files, we may need to apply relocations; see
2332 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
2333 We never compress sections in .o files, so we only need to
2334 try this when the section is not compressed. */
2335 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
2338 info
->buffer
= retbuf
;
2342 abfd
= get_section_bfd_owner (info
);
2343 gdb_assert (abfd
!= NULL
);
2345 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
2346 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
2348 error (_("Dwarf Error: Can't read DWARF data"
2349 " in section %s [in module %s]"),
2350 bfd_section_name (abfd
, sectp
), bfd_get_filename (abfd
));
2354 /* A helper function that returns the size of a section in a safe way.
2355 If you are positive that the section has been read before using the
2356 size, then it is safe to refer to the dwarf2_section_info object's
2357 "size" field directly. In other cases, you must call this
2358 function, because for compressed sections the size field is not set
2359 correctly until the section has been read. */
2361 static bfd_size_type
2362 dwarf2_section_size (struct objfile
*objfile
,
2363 struct dwarf2_section_info
*info
)
2366 dwarf2_read_section (objfile
, info
);
2370 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2374 dwarf2_get_section_info (struct objfile
*objfile
,
2375 enum dwarf2_section_enum sect
,
2376 asection
**sectp
, const gdb_byte
**bufp
,
2377 bfd_size_type
*sizep
)
2379 struct dwarf2_per_objfile
*data
2380 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
2381 dwarf2_objfile_data_key
);
2382 struct dwarf2_section_info
*info
;
2384 /* We may see an objfile without any DWARF, in which case we just
2395 case DWARF2_DEBUG_FRAME
:
2396 info
= &data
->frame
;
2398 case DWARF2_EH_FRAME
:
2399 info
= &data
->eh_frame
;
2402 gdb_assert_not_reached ("unexpected section");
2405 dwarf2_read_section (objfile
, info
);
2407 *sectp
= get_section_bfd_section (info
);
2408 *bufp
= info
->buffer
;
2409 *sizep
= info
->size
;
2412 /* A helper function to find the sections for a .dwz file. */
2415 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2417 struct dwz_file
*dwz_file
= (struct dwz_file
*) arg
;
2419 /* Note that we only support the standard ELF names, because .dwz
2420 is ELF-only (at the time of writing). */
2421 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2423 dwz_file
->abbrev
.s
.section
= sectp
;
2424 dwz_file
->abbrev
.size
= bfd_get_section_size (sectp
);
2426 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2428 dwz_file
->info
.s
.section
= sectp
;
2429 dwz_file
->info
.size
= bfd_get_section_size (sectp
);
2431 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2433 dwz_file
->str
.s
.section
= sectp
;
2434 dwz_file
->str
.size
= bfd_get_section_size (sectp
);
2436 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2438 dwz_file
->line
.s
.section
= sectp
;
2439 dwz_file
->line
.size
= bfd_get_section_size (sectp
);
2441 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2443 dwz_file
->macro
.s
.section
= sectp
;
2444 dwz_file
->macro
.size
= bfd_get_section_size (sectp
);
2446 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2448 dwz_file
->gdb_index
.s
.section
= sectp
;
2449 dwz_file
->gdb_index
.size
= bfd_get_section_size (sectp
);
2453 /* Open the separate '.dwz' debug file, if needed. Return NULL if
2454 there is no .gnu_debugaltlink section in the file. Error if there
2455 is such a section but the file cannot be found. */
2457 static struct dwz_file
*
2458 dwarf2_get_dwz_file (void)
2462 struct cleanup
*cleanup
;
2463 const char *filename
;
2464 struct dwz_file
*result
;
2465 bfd_size_type buildid_len_arg
;
2469 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2470 return dwarf2_per_objfile
->dwz_file
;
2472 bfd_set_error (bfd_error_no_error
);
2473 data
= bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2474 &buildid_len_arg
, &buildid
);
2477 if (bfd_get_error () == bfd_error_no_error
)
2479 error (_("could not read '.gnu_debugaltlink' section: %s"),
2480 bfd_errmsg (bfd_get_error ()));
2482 cleanup
= make_cleanup (xfree
, data
);
2483 make_cleanup (xfree
, buildid
);
2485 buildid_len
= (size_t) buildid_len_arg
;
2487 filename
= (const char *) data
;
2488 if (!IS_ABSOLUTE_PATH (filename
))
2490 char *abs
= gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2493 make_cleanup (xfree
, abs
);
2494 abs
= ldirname (abs
);
2495 make_cleanup (xfree
, abs
);
2497 rel
= concat (abs
, SLASH_STRING
, filename
, (char *) NULL
);
2498 make_cleanup (xfree
, rel
);
2502 /* First try the file name given in the section. If that doesn't
2503 work, try to use the build-id instead. */
2504 dwz_bfd
= gdb_bfd_open (filename
, gnutarget
, -1);
2505 if (dwz_bfd
!= NULL
)
2507 if (!build_id_verify (dwz_bfd
, buildid_len
, buildid
))
2509 gdb_bfd_unref (dwz_bfd
);
2514 if (dwz_bfd
== NULL
)
2515 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2517 if (dwz_bfd
== NULL
)
2518 error (_("could not find '.gnu_debugaltlink' file for %s"),
2519 objfile_name (dwarf2_per_objfile
->objfile
));
2521 result
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
2523 result
->dwz_bfd
= dwz_bfd
;
2525 bfd_map_over_sections (dwz_bfd
, locate_dwz_sections
, result
);
2527 do_cleanups (cleanup
);
2529 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, dwz_bfd
);
2530 dwarf2_per_objfile
->dwz_file
= result
;
2534 /* DWARF quick_symbols_functions support. */
2536 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2537 unique line tables, so we maintain a separate table of all .debug_line
2538 derived entries to support the sharing.
2539 All the quick functions need is the list of file names. We discard the
2540 line_header when we're done and don't need to record it here. */
2541 struct quick_file_names
2543 /* The data used to construct the hash key. */
2544 struct stmt_list_hash hash
;
2546 /* The number of entries in file_names, real_names. */
2547 unsigned int num_file_names
;
2549 /* The file names from the line table, after being run through
2551 const char **file_names
;
2553 /* The file names from the line table after being run through
2554 gdb_realpath. These are computed lazily. */
2555 const char **real_names
;
2558 /* When using the index (and thus not using psymtabs), each CU has an
2559 object of this type. This is used to hold information needed by
2560 the various "quick" methods. */
2561 struct dwarf2_per_cu_quick_data
2563 /* The file table. This can be NULL if there was no file table
2564 or it's currently not read in.
2565 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2566 struct quick_file_names
*file_names
;
2568 /* The corresponding symbol table. This is NULL if symbols for this
2569 CU have not yet been read. */
2570 struct compunit_symtab
*compunit_symtab
;
2572 /* A temporary mark bit used when iterating over all CUs in
2573 expand_symtabs_matching. */
2574 unsigned int mark
: 1;
2576 /* True if we've tried to read the file table and found there isn't one.
2577 There will be no point in trying to read it again next time. */
2578 unsigned int no_file_data
: 1;
2581 /* Utility hash function for a stmt_list_hash. */
2584 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2588 if (stmt_list_hash
->dwo_unit
!= NULL
)
2589 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2590 v
+= stmt_list_hash
->line_offset
.sect_off
;
2594 /* Utility equality function for a stmt_list_hash. */
2597 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2598 const struct stmt_list_hash
*rhs
)
2600 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2602 if (lhs
->dwo_unit
!= NULL
2603 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2606 return lhs
->line_offset
.sect_off
== rhs
->line_offset
.sect_off
;
2609 /* Hash function for a quick_file_names. */
2612 hash_file_name_entry (const void *e
)
2614 const struct quick_file_names
*file_data
2615 = (const struct quick_file_names
*) e
;
2617 return hash_stmt_list_entry (&file_data
->hash
);
2620 /* Equality function for a quick_file_names. */
2623 eq_file_name_entry (const void *a
, const void *b
)
2625 const struct quick_file_names
*ea
= (const struct quick_file_names
*) a
;
2626 const struct quick_file_names
*eb
= (const struct quick_file_names
*) b
;
2628 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2631 /* Delete function for a quick_file_names. */
2634 delete_file_name_entry (void *e
)
2636 struct quick_file_names
*file_data
= (struct quick_file_names
*) e
;
2639 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2641 xfree ((void*) file_data
->file_names
[i
]);
2642 if (file_data
->real_names
)
2643 xfree ((void*) file_data
->real_names
[i
]);
2646 /* The space for the struct itself lives on objfile_obstack,
2647 so we don't free it here. */
2650 /* Create a quick_file_names hash table. */
2653 create_quick_file_names_table (unsigned int nr_initial_entries
)
2655 return htab_create_alloc (nr_initial_entries
,
2656 hash_file_name_entry
, eq_file_name_entry
,
2657 delete_file_name_entry
, xcalloc
, xfree
);
2660 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2661 have to be created afterwards. You should call age_cached_comp_units after
2662 processing PER_CU->CU. dw2_setup must have been already called. */
2665 load_cu (struct dwarf2_per_cu_data
*per_cu
)
2667 if (per_cu
->is_debug_types
)
2668 load_full_type_unit (per_cu
);
2670 load_full_comp_unit (per_cu
, language_minimal
);
2672 if (per_cu
->cu
== NULL
)
2673 return; /* Dummy CU. */
2675 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2678 /* Read in the symbols for PER_CU. */
2681 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2683 struct cleanup
*back_to
;
2685 /* Skip type_unit_groups, reading the type units they contain
2686 is handled elsewhere. */
2687 if (IS_TYPE_UNIT_GROUP (per_cu
))
2690 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
2692 if (dwarf2_per_objfile
->using_index
2693 ? per_cu
->v
.quick
->compunit_symtab
== NULL
2694 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2696 queue_comp_unit (per_cu
, language_minimal
);
2699 /* If we just loaded a CU from a DWO, and we're working with an index
2700 that may badly handle TUs, load all the TUs in that DWO as well.
2701 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2702 if (!per_cu
->is_debug_types
2703 && per_cu
->cu
!= NULL
2704 && per_cu
->cu
->dwo_unit
!= NULL
2705 && dwarf2_per_objfile
->index_table
!= NULL
2706 && dwarf2_per_objfile
->index_table
->version
<= 7
2707 /* DWP files aren't supported yet. */
2708 && get_dwp_file () == NULL
)
2709 queue_and_load_all_dwo_tus (per_cu
);
2714 /* Age the cache, releasing compilation units that have not
2715 been used recently. */
2716 age_cached_comp_units ();
2718 do_cleanups (back_to
);
2721 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2722 the objfile from which this CU came. Returns the resulting symbol
2725 static struct compunit_symtab
*
2726 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2728 gdb_assert (dwarf2_per_objfile
->using_index
);
2729 if (!per_cu
->v
.quick
->compunit_symtab
)
2731 struct cleanup
*back_to
= make_cleanup (free_cached_comp_units
, NULL
);
2732 increment_reading_symtab ();
2733 dw2_do_instantiate_symtab (per_cu
);
2734 process_cu_includes ();
2735 do_cleanups (back_to
);
2738 return per_cu
->v
.quick
->compunit_symtab
;
2741 /* Return the CU/TU given its index.
2743 This is intended for loops like:
2745 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2746 + dwarf2_per_objfile->n_type_units); ++i)
2748 struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i);
2754 static struct dwarf2_per_cu_data
*
2755 dw2_get_cutu (int index
)
2757 if (index
>= dwarf2_per_objfile
->n_comp_units
)
2759 index
-= dwarf2_per_objfile
->n_comp_units
;
2760 gdb_assert (index
< dwarf2_per_objfile
->n_type_units
);
2761 return &dwarf2_per_objfile
->all_type_units
[index
]->per_cu
;
2764 return dwarf2_per_objfile
->all_comp_units
[index
];
2767 /* Return the CU given its index.
2768 This differs from dw2_get_cutu in that it's for when you know INDEX
2771 static struct dwarf2_per_cu_data
*
2772 dw2_get_cu (int index
)
2774 gdb_assert (index
>= 0 && index
< dwarf2_per_objfile
->n_comp_units
);
2776 return dwarf2_per_objfile
->all_comp_units
[index
];
2779 /* A helper for create_cus_from_index that handles a given list of
2783 create_cus_from_index_list (struct objfile
*objfile
,
2784 const gdb_byte
*cu_list
, offset_type n_elements
,
2785 struct dwarf2_section_info
*section
,
2791 for (i
= 0; i
< n_elements
; i
+= 2)
2793 struct dwarf2_per_cu_data
*the_cu
;
2794 ULONGEST offset
, length
;
2796 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2797 offset
= extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2798 length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2801 the_cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2802 struct dwarf2_per_cu_data
);
2803 the_cu
->offset
.sect_off
= offset
;
2804 the_cu
->length
= length
;
2805 the_cu
->objfile
= objfile
;
2806 the_cu
->section
= section
;
2807 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2808 struct dwarf2_per_cu_quick_data
);
2809 the_cu
->is_dwz
= is_dwz
;
2810 dwarf2_per_objfile
->all_comp_units
[base_offset
+ i
/ 2] = the_cu
;
2814 /* Read the CU list from the mapped index, and use it to create all
2815 the CU objects for this objfile. */
2818 create_cus_from_index (struct objfile
*objfile
,
2819 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
2820 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
2822 struct dwz_file
*dwz
;
2824 dwarf2_per_objfile
->n_comp_units
= (cu_list_elements
+ dwz_elements
) / 2;
2825 dwarf2_per_objfile
->all_comp_units
=
2826 XOBNEWVEC (&objfile
->objfile_obstack
, struct dwarf2_per_cu_data
*,
2827 dwarf2_per_objfile
->n_comp_units
);
2829 create_cus_from_index_list (objfile
, cu_list
, cu_list_elements
,
2830 &dwarf2_per_objfile
->info
, 0, 0);
2832 if (dwz_elements
== 0)
2835 dwz
= dwarf2_get_dwz_file ();
2836 create_cus_from_index_list (objfile
, dwz_list
, dwz_elements
, &dwz
->info
, 1,
2837 cu_list_elements
/ 2);
2840 /* Create the signatured type hash table from the index. */
2843 create_signatured_type_table_from_index (struct objfile
*objfile
,
2844 struct dwarf2_section_info
*section
,
2845 const gdb_byte
*bytes
,
2846 offset_type elements
)
2849 htab_t sig_types_hash
;
2851 dwarf2_per_objfile
->n_type_units
2852 = dwarf2_per_objfile
->n_allocated_type_units
2854 dwarf2_per_objfile
->all_type_units
=
2855 XNEWVEC (struct signatured_type
*, dwarf2_per_objfile
->n_type_units
);
2857 sig_types_hash
= allocate_signatured_type_table (objfile
);
2859 for (i
= 0; i
< elements
; i
+= 3)
2861 struct signatured_type
*sig_type
;
2862 ULONGEST offset
, type_offset_in_tu
, signature
;
2865 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2866 offset
= extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
2867 type_offset_in_tu
= extract_unsigned_integer (bytes
+ 8, 8,
2869 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
2872 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2873 struct signatured_type
);
2874 sig_type
->signature
= signature
;
2875 sig_type
->type_offset_in_tu
.cu_off
= type_offset_in_tu
;
2876 sig_type
->per_cu
.is_debug_types
= 1;
2877 sig_type
->per_cu
.section
= section
;
2878 sig_type
->per_cu
.offset
.sect_off
= offset
;
2879 sig_type
->per_cu
.objfile
= objfile
;
2880 sig_type
->per_cu
.v
.quick
2881 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2882 struct dwarf2_per_cu_quick_data
);
2884 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
2887 dwarf2_per_objfile
->all_type_units
[i
/ 3] = sig_type
;
2890 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
2893 /* Read the address map data from the mapped index, and use it to
2894 populate the objfile's psymtabs_addrmap. */
2897 create_addrmap_from_index (struct objfile
*objfile
, struct mapped_index
*index
)
2899 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2900 const gdb_byte
*iter
, *end
;
2901 struct obstack temp_obstack
;
2902 struct addrmap
*mutable_map
;
2903 struct cleanup
*cleanup
;
2906 obstack_init (&temp_obstack
);
2907 cleanup
= make_cleanup_obstack_free (&temp_obstack
);
2908 mutable_map
= addrmap_create_mutable (&temp_obstack
);
2910 iter
= index
->address_table
;
2911 end
= iter
+ index
->address_table_size
;
2913 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2917 ULONGEST hi
, lo
, cu_index
;
2918 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2920 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2922 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
2927 complaint (&symfile_complaints
,
2928 _(".gdb_index address table has invalid range (%s - %s)"),
2929 hex_string (lo
), hex_string (hi
));
2933 if (cu_index
>= dwarf2_per_objfile
->n_comp_units
)
2935 complaint (&symfile_complaints
,
2936 _(".gdb_index address table has invalid CU number %u"),
2937 (unsigned) cu_index
);
2941 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
);
2942 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
);
2943 addrmap_set_empty (mutable_map
, lo
, hi
- 1, dw2_get_cutu (cu_index
));
2946 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
2947 &objfile
->objfile_obstack
);
2948 do_cleanups (cleanup
);
2951 /* The hash function for strings in the mapped index. This is the same as
2952 SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the
2953 implementation. This is necessary because the hash function is tied to the
2954 format of the mapped index file. The hash values do not have to match with
2957 Use INT_MAX for INDEX_VERSION if you generate the current index format. */
2960 mapped_index_string_hash (int index_version
, const void *p
)
2962 const unsigned char *str
= (const unsigned char *) p
;
2966 while ((c
= *str
++) != 0)
2968 if (index_version
>= 5)
2970 r
= r
* 67 + c
- 113;
2976 /* Find a slot in the mapped index INDEX for the object named NAME.
2977 If NAME is found, set *VEC_OUT to point to the CU vector in the
2978 constant pool and return 1. If NAME cannot be found, return 0. */
2981 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
2982 offset_type
**vec_out
)
2984 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
2986 offset_type slot
, step
;
2987 int (*cmp
) (const char *, const char *);
2989 if (current_language
->la_language
== language_cplus
2990 || current_language
->la_language
== language_java
2991 || current_language
->la_language
== language_fortran
2992 || current_language
->la_language
== language_d
)
2994 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
2997 if (strchr (name
, '(') != NULL
)
2999 char *without_params
= cp_remove_params (name
);
3001 if (without_params
!= NULL
)
3003 make_cleanup (xfree
, without_params
);
3004 name
= without_params
;
3009 /* Index version 4 did not support case insensitive searches. But the
3010 indices for case insensitive languages are built in lowercase, therefore
3011 simulate our NAME being searched is also lowercased. */
3012 hash
= mapped_index_string_hash ((index
->version
== 4
3013 && case_sensitivity
== case_sensitive_off
3014 ? 5 : index
->version
),
3017 slot
= hash
& (index
->symbol_table_slots
- 1);
3018 step
= ((hash
* 17) & (index
->symbol_table_slots
- 1)) | 1;
3019 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
3023 /* Convert a slot number to an offset into the table. */
3024 offset_type i
= 2 * slot
;
3026 if (index
->symbol_table
[i
] == 0 && index
->symbol_table
[i
+ 1] == 0)
3028 do_cleanups (back_to
);
3032 str
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[i
]);
3033 if (!cmp (name
, str
))
3035 *vec_out
= (offset_type
*) (index
->constant_pool
3036 + MAYBE_SWAP (index
->symbol_table
[i
+ 1]));
3037 do_cleanups (back_to
);
3041 slot
= (slot
+ step
) & (index
->symbol_table_slots
- 1);
3045 /* A helper function that reads the .gdb_index from SECTION and fills
3046 in MAP. FILENAME is the name of the file containing the section;
3047 it is used for error reporting. DEPRECATED_OK is nonzero if it is
3048 ok to use deprecated sections.
3050 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
3051 out parameters that are filled in with information about the CU and
3052 TU lists in the section.
3054 Returns 1 if all went well, 0 otherwise. */
3057 read_index_from_section (struct objfile
*objfile
,
3058 const char *filename
,
3060 struct dwarf2_section_info
*section
,
3061 struct mapped_index
*map
,
3062 const gdb_byte
**cu_list
,
3063 offset_type
*cu_list_elements
,
3064 const gdb_byte
**types_list
,
3065 offset_type
*types_list_elements
)
3067 const gdb_byte
*addr
;
3068 offset_type version
;
3069 offset_type
*metadata
;
3072 if (dwarf2_section_empty_p (section
))
3075 /* Older elfutils strip versions could keep the section in the main
3076 executable while splitting it for the separate debug info file. */
3077 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
3080 dwarf2_read_section (objfile
, section
);
3082 addr
= section
->buffer
;
3083 /* Version check. */
3084 version
= MAYBE_SWAP (*(offset_type
*) addr
);
3085 /* Versions earlier than 3 emitted every copy of a psymbol. This
3086 causes the index to behave very poorly for certain requests. Version 3
3087 contained incomplete addrmap. So, it seems better to just ignore such
3091 static int warning_printed
= 0;
3092 if (!warning_printed
)
3094 warning (_("Skipping obsolete .gdb_index section in %s."),
3096 warning_printed
= 1;
3100 /* Index version 4 uses a different hash function than index version
3103 Versions earlier than 6 did not emit psymbols for inlined
3104 functions. Using these files will cause GDB not to be able to
3105 set breakpoints on inlined functions by name, so we ignore these
3106 indices unless the user has done
3107 "set use-deprecated-index-sections on". */
3108 if (version
< 6 && !deprecated_ok
)
3110 static int warning_printed
= 0;
3111 if (!warning_printed
)
3114 Skipping deprecated .gdb_index section in %s.\n\
3115 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3116 to use the section anyway."),
3118 warning_printed
= 1;
3122 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3123 of the TU (for symbols coming from TUs),
3124 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3125 Plus gold-generated indices can have duplicate entries for global symbols,
3126 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3127 These are just performance bugs, and we can't distinguish gdb-generated
3128 indices from gold-generated ones, so issue no warning here. */
3130 /* Indexes with higher version than the one supported by GDB may be no
3131 longer backward compatible. */
3135 map
->version
= version
;
3136 map
->total_size
= section
->size
;
3138 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3141 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3142 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3146 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3147 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3148 - MAYBE_SWAP (metadata
[i
]))
3152 map
->address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3153 map
->address_table_size
= (MAYBE_SWAP (metadata
[i
+ 1])
3154 - MAYBE_SWAP (metadata
[i
]));
3157 map
->symbol_table
= (offset_type
*) (addr
+ MAYBE_SWAP (metadata
[i
]));
3158 map
->symbol_table_slots
= ((MAYBE_SWAP (metadata
[i
+ 1])
3159 - MAYBE_SWAP (metadata
[i
]))
3160 / (2 * sizeof (offset_type
)));
3163 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3169 /* Read the index file. If everything went ok, initialize the "quick"
3170 elements of all the CUs and return 1. Otherwise, return 0. */
3173 dwarf2_read_index (struct objfile
*objfile
)
3175 struct mapped_index local_map
, *map
;
3176 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3177 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3178 struct dwz_file
*dwz
;
3180 if (!read_index_from_section (objfile
, objfile_name (objfile
),
3181 use_deprecated_index_sections
,
3182 &dwarf2_per_objfile
->gdb_index
, &local_map
,
3183 &cu_list
, &cu_list_elements
,
3184 &types_list
, &types_list_elements
))
3187 /* Don't use the index if it's empty. */
3188 if (local_map
.symbol_table_slots
== 0)
3191 /* If there is a .dwz file, read it so we can get its CU list as
3193 dwz
= dwarf2_get_dwz_file ();
3196 struct mapped_index dwz_map
;
3197 const gdb_byte
*dwz_types_ignore
;
3198 offset_type dwz_types_elements_ignore
;
3200 if (!read_index_from_section (objfile
, bfd_get_filename (dwz
->dwz_bfd
),
3202 &dwz
->gdb_index
, &dwz_map
,
3203 &dwz_list
, &dwz_list_elements
,
3205 &dwz_types_elements_ignore
))
3207 warning (_("could not read '.gdb_index' section from %s; skipping"),
3208 bfd_get_filename (dwz
->dwz_bfd
));
3213 create_cus_from_index (objfile
, cu_list
, cu_list_elements
, dwz_list
,
3216 if (types_list_elements
)
3218 struct dwarf2_section_info
*section
;
3220 /* We can only handle a single .debug_types when we have an
3222 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
3225 section
= VEC_index (dwarf2_section_info_def
,
3226 dwarf2_per_objfile
->types
, 0);
3228 create_signatured_type_table_from_index (objfile
, section
, types_list
,
3229 types_list_elements
);
3232 create_addrmap_from_index (objfile
, &local_map
);
3234 map
= XOBNEW (&objfile
->objfile_obstack
, struct mapped_index
);
3237 dwarf2_per_objfile
->index_table
= map
;
3238 dwarf2_per_objfile
->using_index
= 1;
3239 dwarf2_per_objfile
->quick_file_names_table
=
3240 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
3245 /* A helper for the "quick" functions which sets the global
3246 dwarf2_per_objfile according to OBJFILE. */
3249 dw2_setup (struct objfile
*objfile
)
3251 dwarf2_per_objfile
= ((struct dwarf2_per_objfile
*)
3252 objfile_data (objfile
, dwarf2_objfile_data_key
));
3253 gdb_assert (dwarf2_per_objfile
);
3256 /* die_reader_func for dw2_get_file_names. */
3259 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3260 const gdb_byte
*info_ptr
,
3261 struct die_info
*comp_unit_die
,
3265 struct dwarf2_cu
*cu
= reader
->cu
;
3266 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3267 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3268 struct dwarf2_per_cu_data
*lh_cu
;
3269 struct line_header
*lh
;
3270 struct attribute
*attr
;
3272 const char *name
, *comp_dir
;
3274 struct quick_file_names
*qfn
;
3275 unsigned int line_offset
;
3277 gdb_assert (! this_cu
->is_debug_types
);
3279 /* Our callers never want to match partial units -- instead they
3280 will match the enclosing full CU. */
3281 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3283 this_cu
->v
.quick
->no_file_data
= 1;
3292 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3295 struct quick_file_names find_entry
;
3297 line_offset
= DW_UNSND (attr
);
3299 /* We may have already read in this line header (TU line header sharing).
3300 If we have we're done. */
3301 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3302 find_entry
.hash
.line_offset
.sect_off
= line_offset
;
3303 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
3304 &find_entry
, INSERT
);
3307 lh_cu
->v
.quick
->file_names
= (struct quick_file_names
*) *slot
;
3311 lh
= dwarf_decode_line_header (line_offset
, cu
);
3315 lh_cu
->v
.quick
->no_file_data
= 1;
3319 qfn
= XOBNEW (&objfile
->objfile_obstack
, struct quick_file_names
);
3320 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3321 qfn
->hash
.line_offset
.sect_off
= line_offset
;
3322 gdb_assert (slot
!= NULL
);
3325 find_file_and_directory (comp_unit_die
, cu
, &name
, &comp_dir
);
3327 qfn
->num_file_names
= lh
->num_file_names
;
3329 XOBNEWVEC (&objfile
->objfile_obstack
, const char *, lh
->num_file_names
);
3330 for (i
= 0; i
< lh
->num_file_names
; ++i
)
3331 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
, comp_dir
);
3332 qfn
->real_names
= NULL
;
3334 free_line_header (lh
);
3336 lh_cu
->v
.quick
->file_names
= qfn
;
3339 /* A helper for the "quick" functions which attempts to read the line
3340 table for THIS_CU. */
3342 static struct quick_file_names
*
3343 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3345 /* This should never be called for TUs. */
3346 gdb_assert (! this_cu
->is_debug_types
);
3347 /* Nor type unit groups. */
3348 gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu
));
3350 if (this_cu
->v
.quick
->file_names
!= NULL
)
3351 return this_cu
->v
.quick
->file_names
;
3352 /* If we know there is no line data, no point in looking again. */
3353 if (this_cu
->v
.quick
->no_file_data
)
3356 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
3358 if (this_cu
->v
.quick
->no_file_data
)
3360 return this_cu
->v
.quick
->file_names
;
3363 /* A helper for the "quick" functions which computes and caches the
3364 real path for a given file name from the line table. */
3367 dw2_get_real_path (struct objfile
*objfile
,
3368 struct quick_file_names
*qfn
, int index
)
3370 if (qfn
->real_names
== NULL
)
3371 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
3372 qfn
->num_file_names
, const char *);
3374 if (qfn
->real_names
[index
] == NULL
)
3375 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]);
3377 return qfn
->real_names
[index
];
3380 static struct symtab
*
3381 dw2_find_last_source_symtab (struct objfile
*objfile
)
3383 struct compunit_symtab
*cust
;
3386 dw2_setup (objfile
);
3387 index
= dwarf2_per_objfile
->n_comp_units
- 1;
3388 cust
= dw2_instantiate_symtab (dw2_get_cutu (index
));
3391 return compunit_primary_filetab (cust
);
3394 /* Traversal function for dw2_forget_cached_source_info. */
3397 dw2_free_cached_file_names (void **slot
, void *info
)
3399 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3401 if (file_data
->real_names
)
3405 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3407 xfree ((void*) file_data
->real_names
[i
]);
3408 file_data
->real_names
[i
] = NULL
;
3416 dw2_forget_cached_source_info (struct objfile
*objfile
)
3418 dw2_setup (objfile
);
3420 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
3421 dw2_free_cached_file_names
, NULL
);
3424 /* Helper function for dw2_map_symtabs_matching_filename that expands
3425 the symtabs and calls the iterator. */
3428 dw2_map_expand_apply (struct objfile
*objfile
,
3429 struct dwarf2_per_cu_data
*per_cu
,
3430 const char *name
, const char *real_path
,
3431 int (*callback
) (struct symtab
*, void *),
3434 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3436 /* Don't visit already-expanded CUs. */
3437 if (per_cu
->v
.quick
->compunit_symtab
)
3440 /* This may expand more than one symtab, and we want to iterate over
3442 dw2_instantiate_symtab (per_cu
);
3444 return iterate_over_some_symtabs (name
, real_path
, callback
, data
,
3445 objfile
->compunit_symtabs
, last_made
);
3448 /* Implementation of the map_symtabs_matching_filename method. */
3451 dw2_map_symtabs_matching_filename (struct objfile
*objfile
, const char *name
,
3452 const char *real_path
,
3453 int (*callback
) (struct symtab
*, void *),
3457 const char *name_basename
= lbasename (name
);
3459 dw2_setup (objfile
);
3461 /* The rule is CUs specify all the files, including those used by
3462 any TU, so there's no need to scan TUs here. */
3464 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3467 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3468 struct quick_file_names
*file_data
;
3470 /* We only need to look at symtabs not already expanded. */
3471 if (per_cu
->v
.quick
->compunit_symtab
)
3474 file_data
= dw2_get_file_names (per_cu
);
3475 if (file_data
== NULL
)
3478 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3480 const char *this_name
= file_data
->file_names
[j
];
3481 const char *this_real_name
;
3483 if (compare_filenames_for_search (this_name
, name
))
3485 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3491 /* Before we invoke realpath, which can get expensive when many
3492 files are involved, do a quick comparison of the basenames. */
3493 if (! basenames_may_differ
3494 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3497 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3498 if (compare_filenames_for_search (this_real_name
, name
))
3500 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3506 if (real_path
!= NULL
)
3508 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3509 gdb_assert (IS_ABSOLUTE_PATH (name
));
3510 if (this_real_name
!= NULL
3511 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3513 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3525 /* Struct used to manage iterating over all CUs looking for a symbol. */
3527 struct dw2_symtab_iterator
3529 /* The internalized form of .gdb_index. */
3530 struct mapped_index
*index
;
3531 /* If non-zero, only look for symbols that match BLOCK_INDEX. */
3532 int want_specific_block
;
3533 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
3534 Unused if !WANT_SPECIFIC_BLOCK. */
3536 /* The kind of symbol we're looking for. */
3538 /* The list of CUs from the index entry of the symbol,
3539 or NULL if not found. */
3541 /* The next element in VEC to look at. */
3543 /* The number of elements in VEC, or zero if there is no match. */
3545 /* Have we seen a global version of the symbol?
3546 If so we can ignore all further global instances.
3547 This is to work around gold/15646, inefficient gold-generated
3552 /* Initialize the index symtab iterator ITER.
3553 If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols
3554 in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
3557 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3558 struct mapped_index
*index
,
3559 int want_specific_block
,
3564 iter
->index
= index
;
3565 iter
->want_specific_block
= want_specific_block
;
3566 iter
->block_index
= block_index
;
3567 iter
->domain
= domain
;
3569 iter
->global_seen
= 0;
3571 if (find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3572 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3580 /* Return the next matching CU or NULL if there are no more. */
3582 static struct dwarf2_per_cu_data
*
3583 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3585 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3587 offset_type cu_index_and_attrs
=
3588 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3589 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3590 struct dwarf2_per_cu_data
*per_cu
;
3591 int want_static
= iter
->block_index
!= GLOBAL_BLOCK
;
3592 /* This value is only valid for index versions >= 7. */
3593 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3594 gdb_index_symbol_kind symbol_kind
=
3595 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3596 /* Only check the symbol attributes if they're present.
3597 Indices prior to version 7 don't record them,
3598 and indices >= 7 may elide them for certain symbols
3599 (gold does this). */
3601 (iter
->index
->version
>= 7
3602 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3604 /* Don't crash on bad data. */
3605 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
3606 + dwarf2_per_objfile
->n_type_units
))
3608 complaint (&symfile_complaints
,
3609 _(".gdb_index entry has bad CU index"
3611 objfile_name (dwarf2_per_objfile
->objfile
));
3615 per_cu
= dw2_get_cutu (cu_index
);
3617 /* Skip if already read in. */
3618 if (per_cu
->v
.quick
->compunit_symtab
)
3621 /* Check static vs global. */
3624 if (iter
->want_specific_block
3625 && want_static
!= is_static
)
3627 /* Work around gold/15646. */
3628 if (!is_static
&& iter
->global_seen
)
3631 iter
->global_seen
= 1;
3634 /* Only check the symbol's kind if it has one. */
3637 switch (iter
->domain
)
3640 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3641 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3642 /* Some types are also in VAR_DOMAIN. */
3643 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3647 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3651 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3666 static struct compunit_symtab
*
3667 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
3668 const char *name
, domain_enum domain
)
3670 struct compunit_symtab
*stab_best
= NULL
;
3671 struct mapped_index
*index
;
3673 dw2_setup (objfile
);
3675 index
= dwarf2_per_objfile
->index_table
;
3677 /* index is NULL if OBJF_READNOW. */
3680 struct dw2_symtab_iterator iter
;
3681 struct dwarf2_per_cu_data
*per_cu
;
3683 dw2_symtab_iter_init (&iter
, index
, 1, block_index
, domain
, name
);
3685 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3687 struct symbol
*sym
, *with_opaque
= NULL
;
3688 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
);
3689 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
3690 struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
3692 sym
= block_find_symbol (block
, name
, domain
,
3693 block_find_non_opaque_type_preferred
,
3696 /* Some caution must be observed with overloaded functions
3697 and methods, since the index will not contain any overload
3698 information (but NAME might contain it). */
3701 && strcmp_iw (SYMBOL_SEARCH_NAME (sym
), name
) == 0)
3703 if (with_opaque
!= NULL
3704 && strcmp_iw (SYMBOL_SEARCH_NAME (with_opaque
), name
) == 0)
3707 /* Keep looking through other CUs. */
3715 dw2_print_stats (struct objfile
*objfile
)
3717 int i
, total
, count
;
3719 dw2_setup (objfile
);
3720 total
= dwarf2_per_objfile
->n_comp_units
+ dwarf2_per_objfile
->n_type_units
;
3722 for (i
= 0; i
< total
; ++i
)
3724 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3726 if (!per_cu
->v
.quick
->compunit_symtab
)
3729 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
3730 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3733 /* This dumps minimal information about the index.
3734 It is called via "mt print objfiles".
3735 One use is to verify .gdb_index has been loaded by the
3736 gdb.dwarf2/gdb-index.exp testcase. */
3739 dw2_dump (struct objfile
*objfile
)
3741 dw2_setup (objfile
);
3742 gdb_assert (dwarf2_per_objfile
->using_index
);
3743 printf_filtered (".gdb_index:");
3744 if (dwarf2_per_objfile
->index_table
!= NULL
)
3746 printf_filtered (" version %d\n",
3747 dwarf2_per_objfile
->index_table
->version
);
3750 printf_filtered (" faked for \"readnow\"\n");
3751 printf_filtered ("\n");
3755 dw2_relocate (struct objfile
*objfile
,
3756 const struct section_offsets
*new_offsets
,
3757 const struct section_offsets
*delta
)
3759 /* There's nothing to relocate here. */
3763 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
3764 const char *func_name
)
3766 struct mapped_index
*index
;
3768 dw2_setup (objfile
);
3770 index
= dwarf2_per_objfile
->index_table
;
3772 /* index is NULL if OBJF_READNOW. */
3775 struct dw2_symtab_iterator iter
;
3776 struct dwarf2_per_cu_data
*per_cu
;
3778 /* Note: It doesn't matter what we pass for block_index here. */
3779 dw2_symtab_iter_init (&iter
, index
, 0, GLOBAL_BLOCK
, VAR_DOMAIN
,
3782 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3783 dw2_instantiate_symtab (per_cu
);
3788 dw2_expand_all_symtabs (struct objfile
*objfile
)
3792 dw2_setup (objfile
);
3794 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3795 + dwarf2_per_objfile
->n_type_units
); ++i
)
3797 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3799 dw2_instantiate_symtab (per_cu
);
3804 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
3805 const char *fullname
)
3809 dw2_setup (objfile
);
3811 /* We don't need to consider type units here.
3812 This is only called for examining code, e.g. expand_line_sal.
3813 There can be an order of magnitude (or more) more type units
3814 than comp units, and we avoid them if we can. */
3816 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3819 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3820 struct quick_file_names
*file_data
;
3822 /* We only need to look at symtabs not already expanded. */
3823 if (per_cu
->v
.quick
->compunit_symtab
)
3826 file_data
= dw2_get_file_names (per_cu
);
3827 if (file_data
== NULL
)
3830 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3832 const char *this_fullname
= file_data
->file_names
[j
];
3834 if (filename_cmp (this_fullname
, fullname
) == 0)
3836 dw2_instantiate_symtab (per_cu
);
3844 dw2_map_matching_symbols (struct objfile
*objfile
,
3845 const char * name
, domain_enum domain
,
3847 int (*callback
) (struct block
*,
3848 struct symbol
*, void *),
3849 void *data
, symbol_compare_ftype
*match
,
3850 symbol_compare_ftype
*ordered_compare
)
3852 /* Currently unimplemented; used for Ada. The function can be called if the
3853 current language is Ada for a non-Ada objfile using GNU index. As Ada
3854 does not look for non-Ada symbols this function should just return. */
3858 dw2_expand_symtabs_matching
3859 (struct objfile
*objfile
,
3860 expand_symtabs_file_matcher_ftype
*file_matcher
,
3861 expand_symtabs_symbol_matcher_ftype
*symbol_matcher
,
3862 expand_symtabs_exp_notify_ftype
*expansion_notify
,
3863 enum search_domain kind
,
3868 struct mapped_index
*index
;
3870 dw2_setup (objfile
);
3872 /* index_table is NULL if OBJF_READNOW. */
3873 if (!dwarf2_per_objfile
->index_table
)
3875 index
= dwarf2_per_objfile
->index_table
;
3877 if (file_matcher
!= NULL
)
3879 struct cleanup
*cleanup
;
3880 htab_t visited_found
, visited_not_found
;
3882 visited_found
= htab_create_alloc (10,
3883 htab_hash_pointer
, htab_eq_pointer
,
3884 NULL
, xcalloc
, xfree
);
3885 cleanup
= make_cleanup_htab_delete (visited_found
);
3886 visited_not_found
= htab_create_alloc (10,
3887 htab_hash_pointer
, htab_eq_pointer
,
3888 NULL
, xcalloc
, xfree
);
3889 make_cleanup_htab_delete (visited_not_found
);
3891 /* The rule is CUs specify all the files, including those used by
3892 any TU, so there's no need to scan TUs here. */
3894 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3897 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3898 struct quick_file_names
*file_data
;
3903 per_cu
->v
.quick
->mark
= 0;
3905 /* We only need to look at symtabs not already expanded. */
3906 if (per_cu
->v
.quick
->compunit_symtab
)
3909 file_data
= dw2_get_file_names (per_cu
);
3910 if (file_data
== NULL
)
3913 if (htab_find (visited_not_found
, file_data
) != NULL
)
3915 else if (htab_find (visited_found
, file_data
) != NULL
)
3917 per_cu
->v
.quick
->mark
= 1;
3921 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3923 const char *this_real_name
;
3925 if (file_matcher (file_data
->file_names
[j
], data
, 0))
3927 per_cu
->v
.quick
->mark
= 1;
3931 /* Before we invoke realpath, which can get expensive when many
3932 files are involved, do a quick comparison of the basenames. */
3933 if (!basenames_may_differ
3934 && !file_matcher (lbasename (file_data
->file_names
[j
]),
3938 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3939 if (file_matcher (this_real_name
, data
, 0))
3941 per_cu
->v
.quick
->mark
= 1;
3946 slot
= htab_find_slot (per_cu
->v
.quick
->mark
3948 : visited_not_found
,
3953 do_cleanups (cleanup
);
3956 for (iter
= 0; iter
< index
->symbol_table_slots
; ++iter
)
3958 offset_type idx
= 2 * iter
;
3960 offset_type
*vec
, vec_len
, vec_idx
;
3961 int global_seen
= 0;
3965 if (index
->symbol_table
[idx
] == 0 && index
->symbol_table
[idx
+ 1] == 0)
3968 name
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[idx
]);
3970 if (! (*symbol_matcher
) (name
, data
))
3973 /* The name was matched, now expand corresponding CUs that were
3975 vec
= (offset_type
*) (index
->constant_pool
3976 + MAYBE_SWAP (index
->symbol_table
[idx
+ 1]));
3977 vec_len
= MAYBE_SWAP (vec
[0]);
3978 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
3980 struct dwarf2_per_cu_data
*per_cu
;
3981 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
3982 /* This value is only valid for index versions >= 7. */
3983 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3984 gdb_index_symbol_kind symbol_kind
=
3985 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3986 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3987 /* Only check the symbol attributes if they're present.
3988 Indices prior to version 7 don't record them,
3989 and indices >= 7 may elide them for certain symbols
3990 (gold does this). */
3992 (index
->version
>= 7
3993 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3995 /* Work around gold/15646. */
3998 if (!is_static
&& global_seen
)
4004 /* Only check the symbol's kind if it has one. */
4009 case VARIABLES_DOMAIN
:
4010 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
4013 case FUNCTIONS_DOMAIN
:
4014 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
4018 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4026 /* Don't crash on bad data. */
4027 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
4028 + dwarf2_per_objfile
->n_type_units
))
4030 complaint (&symfile_complaints
,
4031 _(".gdb_index entry has bad CU index"
4032 " [in module %s]"), objfile_name (objfile
));
4036 per_cu
= dw2_get_cutu (cu_index
);
4037 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
4039 int symtab_was_null
=
4040 (per_cu
->v
.quick
->compunit_symtab
== NULL
);
4042 dw2_instantiate_symtab (per_cu
);
4044 if (expansion_notify
!= NULL
4046 && per_cu
->v
.quick
->compunit_symtab
!= NULL
)
4048 expansion_notify (per_cu
->v
.quick
->compunit_symtab
,
4056 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
4059 static struct compunit_symtab
*
4060 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
4065 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
4066 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
4069 if (cust
->includes
== NULL
)
4072 for (i
= 0; cust
->includes
[i
]; ++i
)
4074 struct compunit_symtab
*s
= cust
->includes
[i
];
4076 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
4084 static struct compunit_symtab
*
4085 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
4086 struct bound_minimal_symbol msymbol
,
4088 struct obj_section
*section
,
4091 struct dwarf2_per_cu_data
*data
;
4092 struct compunit_symtab
*result
;
4094 dw2_setup (objfile
);
4096 if (!objfile
->psymtabs_addrmap
)
4099 data
= (struct dwarf2_per_cu_data
*) addrmap_find (objfile
->psymtabs_addrmap
,
4104 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
4105 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
4106 paddress (get_objfile_arch (objfile
), pc
));
4109 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
),
4111 gdb_assert (result
!= NULL
);
4116 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
4117 void *data
, int need_fullname
)
4120 struct cleanup
*cleanup
;
4121 htab_t visited
= htab_create_alloc (10, htab_hash_pointer
, htab_eq_pointer
,
4122 NULL
, xcalloc
, xfree
);
4124 cleanup
= make_cleanup_htab_delete (visited
);
4125 dw2_setup (objfile
);
4127 /* The rule is CUs specify all the files, including those used by
4128 any TU, so there's no need to scan TUs here.
4129 We can ignore file names coming from already-expanded CUs. */
4131 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4133 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4135 if (per_cu
->v
.quick
->compunit_symtab
)
4137 void **slot
= htab_find_slot (visited
, per_cu
->v
.quick
->file_names
,
4140 *slot
= per_cu
->v
.quick
->file_names
;
4144 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4147 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
4148 struct quick_file_names
*file_data
;
4151 /* We only need to look at symtabs not already expanded. */
4152 if (per_cu
->v
.quick
->compunit_symtab
)
4155 file_data
= dw2_get_file_names (per_cu
);
4156 if (file_data
== NULL
)
4159 slot
= htab_find_slot (visited
, file_data
, INSERT
);
4162 /* Already visited. */
4167 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
4169 const char *this_real_name
;
4172 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
4174 this_real_name
= NULL
;
4175 (*fun
) (file_data
->file_names
[j
], this_real_name
, data
);
4179 do_cleanups (cleanup
);
4183 dw2_has_symbols (struct objfile
*objfile
)
4188 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
4191 dw2_find_last_source_symtab
,
4192 dw2_forget_cached_source_info
,
4193 dw2_map_symtabs_matching_filename
,
4198 dw2_expand_symtabs_for_function
,
4199 dw2_expand_all_symtabs
,
4200 dw2_expand_symtabs_with_fullname
,
4201 dw2_map_matching_symbols
,
4202 dw2_expand_symtabs_matching
,
4203 dw2_find_pc_sect_compunit_symtab
,
4204 dw2_map_symbol_filenames
4207 /* Initialize for reading DWARF for this objfile. Return 0 if this
4208 file will use psymtabs, or 1 if using the GNU index. */
4211 dwarf2_initialize_objfile (struct objfile
*objfile
)
4213 /* If we're about to read full symbols, don't bother with the
4214 indices. In this case we also don't care if some other debug
4215 format is making psymtabs, because they are all about to be
4217 if ((objfile
->flags
& OBJF_READNOW
))
4221 dwarf2_per_objfile
->using_index
= 1;
4222 create_all_comp_units (objfile
);
4223 create_all_type_units (objfile
);
4224 dwarf2_per_objfile
->quick_file_names_table
=
4225 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
4227 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
4228 + dwarf2_per_objfile
->n_type_units
); ++i
)
4230 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4232 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4233 struct dwarf2_per_cu_quick_data
);
4236 /* Return 1 so that gdb sees the "quick" functions. However,
4237 these functions will be no-ops because we will have expanded
4242 if (dwarf2_read_index (objfile
))
4250 /* Build a partial symbol table. */
4253 dwarf2_build_psymtabs (struct objfile
*objfile
)
4256 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
4258 init_psymbol_list (objfile
, 1024);
4263 /* This isn't really ideal: all the data we allocate on the
4264 objfile's obstack is still uselessly kept around. However,
4265 freeing it seems unsafe. */
4266 struct cleanup
*cleanups
= make_cleanup_discard_psymtabs (objfile
);
4268 dwarf2_build_psymtabs_hard (objfile
);
4269 discard_cleanups (cleanups
);
4271 CATCH (except
, RETURN_MASK_ERROR
)
4273 exception_print (gdb_stderr
, except
);
4278 /* Return the total length of the CU described by HEADER. */
4281 get_cu_length (const struct comp_unit_head
*header
)
4283 return header
->initial_length_size
+ header
->length
;
4286 /* Return TRUE if OFFSET is within CU_HEADER. */
4289 offset_in_cu_p (const struct comp_unit_head
*cu_header
, sect_offset offset
)
4291 sect_offset bottom
= { cu_header
->offset
.sect_off
};
4292 sect_offset top
= { cu_header
->offset
.sect_off
+ get_cu_length (cu_header
) };
4294 return (offset
.sect_off
>= bottom
.sect_off
&& offset
.sect_off
< top
.sect_off
);
4297 /* Find the base address of the compilation unit for range lists and
4298 location lists. It will normally be specified by DW_AT_low_pc.
4299 In DWARF-3 draft 4, the base address could be overridden by
4300 DW_AT_entry_pc. It's been removed, but GCC still uses this for
4301 compilation units with discontinuous ranges. */
4304 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
4306 struct attribute
*attr
;
4309 cu
->base_address
= 0;
4311 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
4314 cu
->base_address
= attr_value_as_address (attr
);
4319 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4322 cu
->base_address
= attr_value_as_address (attr
);
4328 /* Read in the comp unit header information from the debug_info at info_ptr.
4329 NOTE: This leaves members offset, first_die_offset to be filled in
4332 static const gdb_byte
*
4333 read_comp_unit_head (struct comp_unit_head
*cu_header
,
4334 const gdb_byte
*info_ptr
, bfd
*abfd
)
4337 unsigned int bytes_read
;
4339 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
4340 cu_header
->initial_length_size
= bytes_read
;
4341 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
4342 info_ptr
+= bytes_read
;
4343 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
4345 cu_header
->abbrev_offset
.sect_off
= read_offset (abfd
, info_ptr
, cu_header
,
4347 info_ptr
+= bytes_read
;
4348 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
4350 signed_addr
= bfd_get_sign_extend_vma (abfd
);
4351 if (signed_addr
< 0)
4352 internal_error (__FILE__
, __LINE__
,
4353 _("read_comp_unit_head: dwarf from non elf file"));
4354 cu_header
->signed_addr_p
= signed_addr
;
4359 /* Helper function that returns the proper abbrev section for
4362 static struct dwarf2_section_info
*
4363 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
4365 struct dwarf2_section_info
*abbrev
;
4367 if (this_cu
->is_dwz
)
4368 abbrev
= &dwarf2_get_dwz_file ()->abbrev
;
4370 abbrev
= &dwarf2_per_objfile
->abbrev
;
4375 /* Subroutine of read_and_check_comp_unit_head and
4376 read_and_check_type_unit_head to simplify them.
4377 Perform various error checking on the header. */
4380 error_check_comp_unit_head (struct comp_unit_head
*header
,
4381 struct dwarf2_section_info
*section
,
4382 struct dwarf2_section_info
*abbrev_section
)
4384 bfd
*abfd
= get_section_bfd_owner (section
);
4385 const char *filename
= get_section_file_name (section
);
4387 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
4388 error (_("Dwarf Error: wrong version in compilation unit header "
4389 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
4392 if (header
->abbrev_offset
.sect_off
4393 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
4394 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
4395 "(offset 0x%lx + 6) [in module %s]"),
4396 (long) header
->abbrev_offset
.sect_off
, (long) header
->offset
.sect_off
,
4399 /* Cast to unsigned long to use 64-bit arithmetic when possible to
4400 avoid potential 32-bit overflow. */
4401 if (((unsigned long) header
->offset
.sect_off
+ get_cu_length (header
))
4403 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
4404 "(offset 0x%lx + 0) [in module %s]"),
4405 (long) header
->length
, (long) header
->offset
.sect_off
,
4409 /* Read in a CU/TU header and perform some basic error checking.
4410 The contents of the header are stored in HEADER.
4411 The result is a pointer to the start of the first DIE. */
4413 static const gdb_byte
*
4414 read_and_check_comp_unit_head (struct comp_unit_head
*header
,
4415 struct dwarf2_section_info
*section
,
4416 struct dwarf2_section_info
*abbrev_section
,
4417 const gdb_byte
*info_ptr
,
4418 int is_debug_types_section
)
4420 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
4421 bfd
*abfd
= get_section_bfd_owner (section
);
4423 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4425 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
4427 /* If we're reading a type unit, skip over the signature and
4428 type_offset fields. */
4429 if (is_debug_types_section
)
4430 info_ptr
+= 8 /*signature*/ + header
->offset_size
;
4432 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4434 error_check_comp_unit_head (header
, section
, abbrev_section
);
4439 /* Read in the types comp unit header information from .debug_types entry at
4440 types_ptr. The result is a pointer to one past the end of the header. */
4442 static const gdb_byte
*
4443 read_and_check_type_unit_head (struct comp_unit_head
*header
,
4444 struct dwarf2_section_info
*section
,
4445 struct dwarf2_section_info
*abbrev_section
,
4446 const gdb_byte
*info_ptr
,
4447 ULONGEST
*signature
,
4448 cu_offset
*type_offset_in_tu
)
4450 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
4451 bfd
*abfd
= get_section_bfd_owner (section
);
4453 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4455 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
4457 /* If we're reading a type unit, skip over the signature and
4458 type_offset fields. */
4459 if (signature
!= NULL
)
4460 *signature
= read_8_bytes (abfd
, info_ptr
);
4462 if (type_offset_in_tu
!= NULL
)
4463 type_offset_in_tu
->cu_off
= read_offset_1 (abfd
, info_ptr
,
4464 header
->offset_size
);
4465 info_ptr
+= header
->offset_size
;
4467 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4469 error_check_comp_unit_head (header
, section
, abbrev_section
);
4474 /* Fetch the abbreviation table offset from a comp or type unit header. */
4477 read_abbrev_offset (struct dwarf2_section_info
*section
,
4480 bfd
*abfd
= get_section_bfd_owner (section
);
4481 const gdb_byte
*info_ptr
;
4482 unsigned int length
, initial_length_size
, offset_size
;
4483 sect_offset abbrev_offset
;
4485 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
4486 info_ptr
= section
->buffer
+ offset
.sect_off
;
4487 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
4488 offset_size
= initial_length_size
== 4 ? 4 : 8;
4489 info_ptr
+= initial_length_size
+ 2 /*version*/;
4490 abbrev_offset
.sect_off
= read_offset_1 (abfd
, info_ptr
, offset_size
);
4491 return abbrev_offset
;
4494 /* Allocate a new partial symtab for file named NAME and mark this new
4495 partial symtab as being an include of PST. */
4498 dwarf2_create_include_psymtab (const char *name
, struct partial_symtab
*pst
,
4499 struct objfile
*objfile
)
4501 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
4503 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
4505 /* It shares objfile->objfile_obstack. */
4506 subpst
->dirname
= pst
->dirname
;
4509 subpst
->textlow
= 0;
4510 subpst
->texthigh
= 0;
4512 subpst
->dependencies
4513 = XOBNEW (&objfile
->objfile_obstack
, struct partial_symtab
*);
4514 subpst
->dependencies
[0] = pst
;
4515 subpst
->number_of_dependencies
= 1;
4517 subpst
->globals_offset
= 0;
4518 subpst
->n_global_syms
= 0;
4519 subpst
->statics_offset
= 0;
4520 subpst
->n_static_syms
= 0;
4521 subpst
->compunit_symtab
= NULL
;
4522 subpst
->read_symtab
= pst
->read_symtab
;
4525 /* No private part is necessary for include psymtabs. This property
4526 can be used to differentiate between such include psymtabs and
4527 the regular ones. */
4528 subpst
->read_symtab_private
= NULL
;
4531 /* Read the Line Number Program data and extract the list of files
4532 included by the source file represented by PST. Build an include
4533 partial symtab for each of these included files. */
4536 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
4537 struct die_info
*die
,
4538 struct partial_symtab
*pst
)
4540 struct line_header
*lh
= NULL
;
4541 struct attribute
*attr
;
4543 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
4545 lh
= dwarf_decode_line_header (DW_UNSND (attr
), cu
);
4547 return; /* No linetable, so no includes. */
4549 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
4550 dwarf_decode_lines (lh
, pst
->dirname
, cu
, pst
, pst
->textlow
, 1);
4552 free_line_header (lh
);
4556 hash_signatured_type (const void *item
)
4558 const struct signatured_type
*sig_type
4559 = (const struct signatured_type
*) item
;
4561 /* This drops the top 32 bits of the signature, but is ok for a hash. */
4562 return sig_type
->signature
;
4566 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
4568 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
4569 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
4571 return lhs
->signature
== rhs
->signature
;
4574 /* Allocate a hash table for signatured types. */
4577 allocate_signatured_type_table (struct objfile
*objfile
)
4579 return htab_create_alloc_ex (41,
4580 hash_signatured_type
,
4583 &objfile
->objfile_obstack
,
4584 hashtab_obstack_allocate
,
4585 dummy_obstack_deallocate
);
4588 /* A helper function to add a signatured type CU to a table. */
4591 add_signatured_type_cu_to_table (void **slot
, void *datum
)
4593 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
4594 struct signatured_type
***datap
= (struct signatured_type
***) datum
;
4602 /* Create the hash table of all entries in the .debug_types
4603 (or .debug_types.dwo) section(s).
4604 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
4605 otherwise it is NULL.
4607 The result is a pointer to the hash table or NULL if there are no types.
4609 Note: This function processes DWO files only, not DWP files. */
4612 create_debug_types_hash_table (struct dwo_file
*dwo_file
,
4613 VEC (dwarf2_section_info_def
) *types
)
4615 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4616 htab_t types_htab
= NULL
;
4618 struct dwarf2_section_info
*section
;
4619 struct dwarf2_section_info
*abbrev_section
;
4621 if (VEC_empty (dwarf2_section_info_def
, types
))
4624 abbrev_section
= (dwo_file
!= NULL
4625 ? &dwo_file
->sections
.abbrev
4626 : &dwarf2_per_objfile
->abbrev
);
4628 if (dwarf_read_debug
)
4629 fprintf_unfiltered (gdb_stdlog
, "Reading .debug_types%s for %s:\n",
4630 dwo_file
? ".dwo" : "",
4631 get_section_file_name (abbrev_section
));
4634 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
4638 const gdb_byte
*info_ptr
, *end_ptr
;
4640 dwarf2_read_section (objfile
, section
);
4641 info_ptr
= section
->buffer
;
4643 if (info_ptr
== NULL
)
4646 /* We can't set abfd until now because the section may be empty or
4647 not present, in which case the bfd is unknown. */
4648 abfd
= get_section_bfd_owner (section
);
4650 /* We don't use init_cutu_and_read_dies_simple, or some such, here
4651 because we don't need to read any dies: the signature is in the
4654 end_ptr
= info_ptr
+ section
->size
;
4655 while (info_ptr
< end_ptr
)
4658 cu_offset type_offset_in_tu
;
4660 struct signatured_type
*sig_type
;
4661 struct dwo_unit
*dwo_tu
;
4663 const gdb_byte
*ptr
= info_ptr
;
4664 struct comp_unit_head header
;
4665 unsigned int length
;
4667 offset
.sect_off
= ptr
- section
->buffer
;
4669 /* We need to read the type's signature in order to build the hash
4670 table, but we don't need anything else just yet. */
4672 ptr
= read_and_check_type_unit_head (&header
, section
,
4673 abbrev_section
, ptr
,
4674 &signature
, &type_offset_in_tu
);
4676 length
= get_cu_length (&header
);
4678 /* Skip dummy type units. */
4679 if (ptr
>= info_ptr
+ length
4680 || peek_abbrev_code (abfd
, ptr
) == 0)
4686 if (types_htab
== NULL
)
4689 types_htab
= allocate_dwo_unit_table (objfile
);
4691 types_htab
= allocate_signatured_type_table (objfile
);
4697 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4699 dwo_tu
->dwo_file
= dwo_file
;
4700 dwo_tu
->signature
= signature
;
4701 dwo_tu
->type_offset_in_tu
= type_offset_in_tu
;
4702 dwo_tu
->section
= section
;
4703 dwo_tu
->offset
= offset
;
4704 dwo_tu
->length
= length
;
4708 /* N.B.: type_offset is not usable if this type uses a DWO file.
4709 The real type_offset is in the DWO file. */
4711 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4712 struct signatured_type
);
4713 sig_type
->signature
= signature
;
4714 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
4715 sig_type
->per_cu
.objfile
= objfile
;
4716 sig_type
->per_cu
.is_debug_types
= 1;
4717 sig_type
->per_cu
.section
= section
;
4718 sig_type
->per_cu
.offset
= offset
;
4719 sig_type
->per_cu
.length
= length
;
4722 slot
= htab_find_slot (types_htab
,
4723 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
4725 gdb_assert (slot
!= NULL
);
4728 sect_offset dup_offset
;
4732 const struct dwo_unit
*dup_tu
4733 = (const struct dwo_unit
*) *slot
;
4735 dup_offset
= dup_tu
->offset
;
4739 const struct signatured_type
*dup_tu
4740 = (const struct signatured_type
*) *slot
;
4742 dup_offset
= dup_tu
->per_cu
.offset
;
4745 complaint (&symfile_complaints
,
4746 _("debug type entry at offset 0x%x is duplicate to"
4747 " the entry at offset 0x%x, signature %s"),
4748 offset
.sect_off
, dup_offset
.sect_off
,
4749 hex_string (signature
));
4751 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
4753 if (dwarf_read_debug
> 1)
4754 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature %s\n",
4756 hex_string (signature
));
4765 /* Create the hash table of all entries in the .debug_types section,
4766 and initialize all_type_units.
4767 The result is zero if there is an error (e.g. missing .debug_types section),
4768 otherwise non-zero. */
4771 create_all_type_units (struct objfile
*objfile
)
4774 struct signatured_type
**iter
;
4776 types_htab
= create_debug_types_hash_table (NULL
, dwarf2_per_objfile
->types
);
4777 if (types_htab
== NULL
)
4779 dwarf2_per_objfile
->signatured_types
= NULL
;
4783 dwarf2_per_objfile
->signatured_types
= types_htab
;
4785 dwarf2_per_objfile
->n_type_units
4786 = dwarf2_per_objfile
->n_allocated_type_units
4787 = htab_elements (types_htab
);
4788 dwarf2_per_objfile
->all_type_units
=
4789 XNEWVEC (struct signatured_type
*, dwarf2_per_objfile
->n_type_units
);
4790 iter
= &dwarf2_per_objfile
->all_type_units
[0];
4791 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
4792 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
4793 == dwarf2_per_objfile
->n_type_units
);
4798 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
4799 If SLOT is non-NULL, it is the entry to use in the hash table.
4800 Otherwise we find one. */
4802 static struct signatured_type
*
4803 add_type_unit (ULONGEST sig
, void **slot
)
4805 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4806 int n_type_units
= dwarf2_per_objfile
->n_type_units
;
4807 struct signatured_type
*sig_type
;
4809 gdb_assert (n_type_units
<= dwarf2_per_objfile
->n_allocated_type_units
);
4811 if (n_type_units
> dwarf2_per_objfile
->n_allocated_type_units
)
4813 if (dwarf2_per_objfile
->n_allocated_type_units
== 0)
4814 dwarf2_per_objfile
->n_allocated_type_units
= 1;
4815 dwarf2_per_objfile
->n_allocated_type_units
*= 2;
4816 dwarf2_per_objfile
->all_type_units
4817 = XRESIZEVEC (struct signatured_type
*,
4818 dwarf2_per_objfile
->all_type_units
,
4819 dwarf2_per_objfile
->n_allocated_type_units
);
4820 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
4822 dwarf2_per_objfile
->n_type_units
= n_type_units
;
4824 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4825 struct signatured_type
);
4826 dwarf2_per_objfile
->all_type_units
[n_type_units
- 1] = sig_type
;
4827 sig_type
->signature
= sig
;
4828 sig_type
->per_cu
.is_debug_types
= 1;
4829 if (dwarf2_per_objfile
->using_index
)
4831 sig_type
->per_cu
.v
.quick
=
4832 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4833 struct dwarf2_per_cu_quick_data
);
4838 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4841 gdb_assert (*slot
== NULL
);
4843 /* The rest of sig_type must be filled in by the caller. */
4847 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
4848 Fill in SIG_ENTRY with DWO_ENTRY. */
4851 fill_in_sig_entry_from_dwo_entry (struct objfile
*objfile
,
4852 struct signatured_type
*sig_entry
,
4853 struct dwo_unit
*dwo_entry
)
4855 /* Make sure we're not clobbering something we don't expect to. */
4856 gdb_assert (! sig_entry
->per_cu
.queued
);
4857 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
4858 if (dwarf2_per_objfile
->using_index
)
4860 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
4861 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
4864 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
4865 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
4866 gdb_assert (sig_entry
->type_offset_in_section
.sect_off
== 0);
4867 gdb_assert (sig_entry
->type_unit_group
== NULL
);
4868 gdb_assert (sig_entry
->dwo_unit
== NULL
);
4870 sig_entry
->per_cu
.section
= dwo_entry
->section
;
4871 sig_entry
->per_cu
.offset
= dwo_entry
->offset
;
4872 sig_entry
->per_cu
.length
= dwo_entry
->length
;
4873 sig_entry
->per_cu
.reading_dwo_directly
= 1;
4874 sig_entry
->per_cu
.objfile
= objfile
;
4875 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
4876 sig_entry
->dwo_unit
= dwo_entry
;
4879 /* Subroutine of lookup_signatured_type.
4880 If we haven't read the TU yet, create the signatured_type data structure
4881 for a TU to be read in directly from a DWO file, bypassing the stub.
4882 This is the "Stay in DWO Optimization": When there is no DWP file and we're
4883 using .gdb_index, then when reading a CU we want to stay in the DWO file
4884 containing that CU. Otherwise we could end up reading several other DWO
4885 files (due to comdat folding) to process the transitive closure of all the
4886 mentioned TUs, and that can be slow. The current DWO file will have every
4887 type signature that it needs.
4888 We only do this for .gdb_index because in the psymtab case we already have
4889 to read all the DWOs to build the type unit groups. */
4891 static struct signatured_type
*
4892 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4894 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4895 struct dwo_file
*dwo_file
;
4896 struct dwo_unit find_dwo_entry
, *dwo_entry
;
4897 struct signatured_type find_sig_entry
, *sig_entry
;
4900 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
4902 /* If TU skeletons have been removed then we may not have read in any
4904 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4906 dwarf2_per_objfile
->signatured_types
4907 = allocate_signatured_type_table (objfile
);
4910 /* We only ever need to read in one copy of a signatured type.
4911 Use the global signatured_types array to do our own comdat-folding
4912 of types. If this is the first time we're reading this TU, and
4913 the TU has an entry in .gdb_index, replace the recorded data from
4914 .gdb_index with this TU. */
4916 find_sig_entry
.signature
= sig
;
4917 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4918 &find_sig_entry
, INSERT
);
4919 sig_entry
= (struct signatured_type
*) *slot
;
4921 /* We can get here with the TU already read, *or* in the process of being
4922 read. Don't reassign the global entry to point to this DWO if that's
4923 the case. Also note that if the TU is already being read, it may not
4924 have come from a DWO, the program may be a mix of Fission-compiled
4925 code and non-Fission-compiled code. */
4927 /* Have we already tried to read this TU?
4928 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
4929 needn't exist in the global table yet). */
4930 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
4933 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
4934 dwo_unit of the TU itself. */
4935 dwo_file
= cu
->dwo_unit
->dwo_file
;
4937 /* Ok, this is the first time we're reading this TU. */
4938 if (dwo_file
->tus
== NULL
)
4940 find_dwo_entry
.signature
= sig
;
4941 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_entry
);
4942 if (dwo_entry
== NULL
)
4945 /* If the global table doesn't have an entry for this TU, add one. */
4946 if (sig_entry
== NULL
)
4947 sig_entry
= add_type_unit (sig
, slot
);
4949 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
4950 sig_entry
->per_cu
.tu_read
= 1;
4954 /* Subroutine of lookup_signatured_type.
4955 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
4956 then try the DWP file. If the TU stub (skeleton) has been removed then
4957 it won't be in .gdb_index. */
4959 static struct signatured_type
*
4960 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4962 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4963 struct dwp_file
*dwp_file
= get_dwp_file ();
4964 struct dwo_unit
*dwo_entry
;
4965 struct signatured_type find_sig_entry
, *sig_entry
;
4968 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
4969 gdb_assert (dwp_file
!= NULL
);
4971 /* If TU skeletons have been removed then we may not have read in any
4973 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4975 dwarf2_per_objfile
->signatured_types
4976 = allocate_signatured_type_table (objfile
);
4979 find_sig_entry
.signature
= sig
;
4980 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4981 &find_sig_entry
, INSERT
);
4982 sig_entry
= (struct signatured_type
*) *slot
;
4984 /* Have we already tried to read this TU?
4985 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
4986 needn't exist in the global table yet). */
4987 if (sig_entry
!= NULL
)
4990 if (dwp_file
->tus
== NULL
)
4992 dwo_entry
= lookup_dwo_unit_in_dwp (dwp_file
, NULL
,
4993 sig
, 1 /* is_debug_types */);
4994 if (dwo_entry
== NULL
)
4997 sig_entry
= add_type_unit (sig
, slot
);
4998 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
5003 /* Lookup a signature based type for DW_FORM_ref_sig8.
5004 Returns NULL if signature SIG is not present in the table.
5005 It is up to the caller to complain about this. */
5007 static struct signatured_type
*
5008 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
5011 && dwarf2_per_objfile
->using_index
)
5013 /* We're in a DWO/DWP file, and we're using .gdb_index.
5014 These cases require special processing. */
5015 if (get_dwp_file () == NULL
)
5016 return lookup_dwo_signatured_type (cu
, sig
);
5018 return lookup_dwp_signatured_type (cu
, sig
);
5022 struct signatured_type find_entry
, *entry
;
5024 if (dwarf2_per_objfile
->signatured_types
== NULL
)
5026 find_entry
.signature
= sig
;
5027 entry
= ((struct signatured_type
*)
5028 htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
));
5033 /* Low level DIE reading support. */
5035 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
5038 init_cu_die_reader (struct die_reader_specs
*reader
,
5039 struct dwarf2_cu
*cu
,
5040 struct dwarf2_section_info
*section
,
5041 struct dwo_file
*dwo_file
)
5043 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
5044 reader
->abfd
= get_section_bfd_owner (section
);
5046 reader
->dwo_file
= dwo_file
;
5047 reader
->die_section
= section
;
5048 reader
->buffer
= section
->buffer
;
5049 reader
->buffer_end
= section
->buffer
+ section
->size
;
5050 reader
->comp_dir
= NULL
;
5053 /* Subroutine of init_cutu_and_read_dies to simplify it.
5054 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
5055 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
5058 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
5059 from it to the DIE in the DWO. If NULL we are skipping the stub.
5060 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
5061 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
5062 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
5063 STUB_COMP_DIR may be non-NULL.
5064 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
5065 are filled in with the info of the DIE from the DWO file.
5066 ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies
5067 provided an abbrev table to use.
5068 The result is non-zero if a valid (non-dummy) DIE was found. */
5071 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
5072 struct dwo_unit
*dwo_unit
,
5073 int abbrev_table_provided
,
5074 struct die_info
*stub_comp_unit_die
,
5075 const char *stub_comp_dir
,
5076 struct die_reader_specs
*result_reader
,
5077 const gdb_byte
**result_info_ptr
,
5078 struct die_info
**result_comp_unit_die
,
5079 int *result_has_children
)
5081 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5082 struct dwarf2_cu
*cu
= this_cu
->cu
;
5083 struct dwarf2_section_info
*section
;
5085 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5086 ULONGEST signature
; /* Or dwo_id. */
5087 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
5088 int i
,num_extra_attrs
;
5089 struct dwarf2_section_info
*dwo_abbrev_section
;
5090 struct attribute
*attr
;
5091 struct die_info
*comp_unit_die
;
5093 /* At most one of these may be provided. */
5094 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
5096 /* These attributes aren't processed until later:
5097 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
5098 DW_AT_comp_dir is used now, to find the DWO file, but it is also
5099 referenced later. However, these attributes are found in the stub
5100 which we won't have later. In order to not impose this complication
5101 on the rest of the code, we read them here and copy them to the
5110 if (stub_comp_unit_die
!= NULL
)
5112 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
5114 if (! this_cu
->is_debug_types
)
5115 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
5116 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
5117 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
5118 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
5119 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
5121 /* There should be a DW_AT_addr_base attribute here (if needed).
5122 We need the value before we can process DW_FORM_GNU_addr_index. */
5124 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
5126 cu
->addr_base
= DW_UNSND (attr
);
5128 /* There should be a DW_AT_ranges_base attribute here (if needed).
5129 We need the value before we can process DW_AT_ranges. */
5130 cu
->ranges_base
= 0;
5131 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
5133 cu
->ranges_base
= DW_UNSND (attr
);
5135 else if (stub_comp_dir
!= NULL
)
5137 /* Reconstruct the comp_dir attribute to simplify the code below. */
5138 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
5139 comp_dir
->name
= DW_AT_comp_dir
;
5140 comp_dir
->form
= DW_FORM_string
;
5141 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
5142 DW_STRING (comp_dir
) = stub_comp_dir
;
5145 /* Set up for reading the DWO CU/TU. */
5146 cu
->dwo_unit
= dwo_unit
;
5147 section
= dwo_unit
->section
;
5148 dwarf2_read_section (objfile
, section
);
5149 abfd
= get_section_bfd_owner (section
);
5150 begin_info_ptr
= info_ptr
= section
->buffer
+ dwo_unit
->offset
.sect_off
;
5151 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
5152 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
);
5154 if (this_cu
->is_debug_types
)
5156 ULONGEST header_signature
;
5157 cu_offset type_offset_in_tu
;
5158 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
5160 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
5164 &type_offset_in_tu
);
5165 /* This is not an assert because it can be caused by bad debug info. */
5166 if (sig_type
->signature
!= header_signature
)
5168 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
5169 " TU at offset 0x%x [in module %s]"),
5170 hex_string (sig_type
->signature
),
5171 hex_string (header_signature
),
5172 dwo_unit
->offset
.sect_off
,
5173 bfd_get_filename (abfd
));
5175 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5176 /* For DWOs coming from DWP files, we don't know the CU length
5177 nor the type's offset in the TU until now. */
5178 dwo_unit
->length
= get_cu_length (&cu
->header
);
5179 dwo_unit
->type_offset_in_tu
= type_offset_in_tu
;
5181 /* Establish the type offset that can be used to lookup the type.
5182 For DWO files, we don't know it until now. */
5183 sig_type
->type_offset_in_section
.sect_off
=
5184 dwo_unit
->offset
.sect_off
+ dwo_unit
->type_offset_in_tu
.cu_off
;
5188 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5191 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5192 /* For DWOs coming from DWP files, we don't know the CU length
5194 dwo_unit
->length
= get_cu_length (&cu
->header
);
5197 /* Replace the CU's original abbrev table with the DWO's.
5198 Reminder: We can't read the abbrev table until we've read the header. */
5199 if (abbrev_table_provided
)
5201 /* Don't free the provided abbrev table, the caller of
5202 init_cutu_and_read_dies owns it. */
5203 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5204 /* Ensure the DWO abbrev table gets freed. */
5205 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5209 dwarf2_free_abbrev_table (cu
);
5210 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5211 /* Leave any existing abbrev table cleanup as is. */
5214 /* Read in the die, but leave space to copy over the attributes
5215 from the stub. This has the benefit of simplifying the rest of
5216 the code - all the work to maintain the illusion of a single
5217 DW_TAG_{compile,type}_unit DIE is done here. */
5218 num_extra_attrs
= ((stmt_list
!= NULL
)
5222 + (comp_dir
!= NULL
));
5223 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
5224 result_has_children
, num_extra_attrs
);
5226 /* Copy over the attributes from the stub to the DIE we just read in. */
5227 comp_unit_die
= *result_comp_unit_die
;
5228 i
= comp_unit_die
->num_attrs
;
5229 if (stmt_list
!= NULL
)
5230 comp_unit_die
->attrs
[i
++] = *stmt_list
;
5232 comp_unit_die
->attrs
[i
++] = *low_pc
;
5233 if (high_pc
!= NULL
)
5234 comp_unit_die
->attrs
[i
++] = *high_pc
;
5236 comp_unit_die
->attrs
[i
++] = *ranges
;
5237 if (comp_dir
!= NULL
)
5238 comp_unit_die
->attrs
[i
++] = *comp_dir
;
5239 comp_unit_die
->num_attrs
+= num_extra_attrs
;
5241 if (dwarf_die_debug
)
5243 fprintf_unfiltered (gdb_stdlog
,
5244 "Read die from %s@0x%x of %s:\n",
5245 get_section_name (section
),
5246 (unsigned) (begin_info_ptr
- section
->buffer
),
5247 bfd_get_filename (abfd
));
5248 dump_die (comp_unit_die
, dwarf_die_debug
);
5251 /* Save the comp_dir attribute. If there is no DWP file then we'll read
5252 TUs by skipping the stub and going directly to the entry in the DWO file.
5253 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
5254 to get it via circuitous means. Blech. */
5255 if (comp_dir
!= NULL
)
5256 result_reader
->comp_dir
= DW_STRING (comp_dir
);
5258 /* Skip dummy compilation units. */
5259 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
5260 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5263 *result_info_ptr
= info_ptr
;
5267 /* Subroutine of init_cutu_and_read_dies to simplify it.
5268 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
5269 Returns NULL if the specified DWO unit cannot be found. */
5271 static struct dwo_unit
*
5272 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
5273 struct die_info
*comp_unit_die
)
5275 struct dwarf2_cu
*cu
= this_cu
->cu
;
5276 struct attribute
*attr
;
5278 struct dwo_unit
*dwo_unit
;
5279 const char *comp_dir
, *dwo_name
;
5281 gdb_assert (cu
!= NULL
);
5283 /* Yeah, we look dwo_name up again, but it simplifies the code. */
5284 dwo_name
= dwarf2_string_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5285 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
5287 if (this_cu
->is_debug_types
)
5289 struct signatured_type
*sig_type
;
5291 /* Since this_cu is the first member of struct signatured_type,
5292 we can go from a pointer to one to a pointer to the other. */
5293 sig_type
= (struct signatured_type
*) this_cu
;
5294 signature
= sig_type
->signature
;
5295 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
5299 struct attribute
*attr
;
5301 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
5303 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
5305 dwo_name
, objfile_name (this_cu
->objfile
));
5306 signature
= DW_UNSND (attr
);
5307 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
5314 /* Subroutine of init_cutu_and_read_dies to simplify it.
5315 See it for a description of the parameters.
5316 Read a TU directly from a DWO file, bypassing the stub.
5318 Note: This function could be a little bit simpler if we shared cleanups
5319 with our caller, init_cutu_and_read_dies. That's generally a fragile thing
5320 to do, so we keep this function self-contained. Or we could move this
5321 into our caller, but it's complex enough already. */
5324 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
5325 int use_existing_cu
, int keep
,
5326 die_reader_func_ftype
*die_reader_func
,
5329 struct dwarf2_cu
*cu
;
5330 struct signatured_type
*sig_type
;
5331 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5332 struct die_reader_specs reader
;
5333 const gdb_byte
*info_ptr
;
5334 struct die_info
*comp_unit_die
;
5337 /* Verify we can do the following downcast, and that we have the
5339 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
5340 sig_type
= (struct signatured_type
*) this_cu
;
5341 gdb_assert (sig_type
->dwo_unit
!= NULL
);
5343 cleanups
= make_cleanup (null_cleanup
, NULL
);
5345 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5347 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
5349 /* There's no need to do the rereading_dwo_cu handling that
5350 init_cutu_and_read_dies does since we don't read the stub. */
5354 /* If !use_existing_cu, this_cu->cu must be NULL. */
5355 gdb_assert (this_cu
->cu
== NULL
);
5356 cu
= XNEW (struct dwarf2_cu
);
5357 init_one_comp_unit (cu
, this_cu
);
5358 /* If an error occurs while loading, release our storage. */
5359 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5362 /* A future optimization, if needed, would be to use an existing
5363 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
5364 could share abbrev tables. */
5366 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
5367 0 /* abbrev_table_provided */,
5368 NULL
/* stub_comp_unit_die */,
5369 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
5371 &comp_unit_die
, &has_children
) == 0)
5374 do_cleanups (cleanups
);
5378 /* All the "real" work is done here. */
5379 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5381 /* This duplicates the code in init_cutu_and_read_dies,
5382 but the alternative is making the latter more complex.
5383 This function is only for the special case of using DWO files directly:
5384 no point in overly complicating the general case just to handle this. */
5385 if (free_cu_cleanup
!= NULL
)
5389 /* We've successfully allocated this compilation unit. Let our
5390 caller clean it up when finished with it. */
5391 discard_cleanups (free_cu_cleanup
);
5393 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5394 So we have to manually free the abbrev table. */
5395 dwarf2_free_abbrev_table (cu
);
5397 /* Link this CU into read_in_chain. */
5398 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5399 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5402 do_cleanups (free_cu_cleanup
);
5405 do_cleanups (cleanups
);
5408 /* Initialize a CU (or TU) and read its DIEs.
5409 If the CU defers to a DWO file, read the DWO file as well.
5411 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
5412 Otherwise the table specified in the comp unit header is read in and used.
5413 This is an optimization for when we already have the abbrev table.
5415 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
5416 Otherwise, a new CU is allocated with xmalloc.
5418 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
5419 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
5421 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5422 linker) then DIE_READER_FUNC will not get called. */
5425 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
5426 struct abbrev_table
*abbrev_table
,
5427 int use_existing_cu
, int keep
,
5428 die_reader_func_ftype
*die_reader_func
,
5431 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5432 struct dwarf2_section_info
*section
= this_cu
->section
;
5433 bfd
*abfd
= get_section_bfd_owner (section
);
5434 struct dwarf2_cu
*cu
;
5435 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5436 struct die_reader_specs reader
;
5437 struct die_info
*comp_unit_die
;
5439 struct attribute
*attr
;
5440 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5441 struct signatured_type
*sig_type
= NULL
;
5442 struct dwarf2_section_info
*abbrev_section
;
5443 /* Non-zero if CU currently points to a DWO file and we need to
5444 reread it. When this happens we need to reread the skeleton die
5445 before we can reread the DWO file (this only applies to CUs, not TUs). */
5446 int rereading_dwo_cu
= 0;
5448 if (dwarf_die_debug
)
5449 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5450 this_cu
->is_debug_types
? "type" : "comp",
5451 this_cu
->offset
.sect_off
);
5453 if (use_existing_cu
)
5456 /* If we're reading a TU directly from a DWO file, including a virtual DWO
5457 file (instead of going through the stub), short-circuit all of this. */
5458 if (this_cu
->reading_dwo_directly
)
5460 /* Narrow down the scope of possibilities to have to understand. */
5461 gdb_assert (this_cu
->is_debug_types
);
5462 gdb_assert (abbrev_table
== NULL
);
5463 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
, keep
,
5464 die_reader_func
, data
);
5468 cleanups
= make_cleanup (null_cleanup
, NULL
);
5470 /* This is cheap if the section is already read in. */
5471 dwarf2_read_section (objfile
, section
);
5473 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
5475 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
5477 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5480 /* If this CU is from a DWO file we need to start over, we need to
5481 refetch the attributes from the skeleton CU.
5482 This could be optimized by retrieving those attributes from when we
5483 were here the first time: the previous comp_unit_die was stored in
5484 comp_unit_obstack. But there's no data yet that we need this
5486 if (cu
->dwo_unit
!= NULL
)
5487 rereading_dwo_cu
= 1;
5491 /* If !use_existing_cu, this_cu->cu must be NULL. */
5492 gdb_assert (this_cu
->cu
== NULL
);
5493 cu
= XNEW (struct dwarf2_cu
);
5494 init_one_comp_unit (cu
, this_cu
);
5495 /* If an error occurs while loading, release our storage. */
5496 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5499 /* Get the header. */
5500 if (cu
->header
.first_die_offset
.cu_off
!= 0 && ! rereading_dwo_cu
)
5502 /* We already have the header, there's no need to read it in again. */
5503 info_ptr
+= cu
->header
.first_die_offset
.cu_off
;
5507 if (this_cu
->is_debug_types
)
5510 cu_offset type_offset_in_tu
;
5512 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
5513 abbrev_section
, info_ptr
,
5515 &type_offset_in_tu
);
5517 /* Since per_cu is the first member of struct signatured_type,
5518 we can go from a pointer to one to a pointer to the other. */
5519 sig_type
= (struct signatured_type
*) this_cu
;
5520 gdb_assert (sig_type
->signature
== signature
);
5521 gdb_assert (sig_type
->type_offset_in_tu
.cu_off
5522 == type_offset_in_tu
.cu_off
);
5523 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5525 /* LENGTH has not been set yet for type units if we're
5526 using .gdb_index. */
5527 this_cu
->length
= get_cu_length (&cu
->header
);
5529 /* Establish the type offset that can be used to lookup the type. */
5530 sig_type
->type_offset_in_section
.sect_off
=
5531 this_cu
->offset
.sect_off
+ sig_type
->type_offset_in_tu
.cu_off
;
5535 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5539 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5540 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
5544 /* Skip dummy compilation units. */
5545 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5546 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5548 do_cleanups (cleanups
);
5552 /* If we don't have them yet, read the abbrevs for this compilation unit.
5553 And if we need to read them now, make sure they're freed when we're
5554 done. Note that it's important that if the CU had an abbrev table
5555 on entry we don't free it when we're done: Somewhere up the call stack
5556 it may be in use. */
5557 if (abbrev_table
!= NULL
)
5559 gdb_assert (cu
->abbrev_table
== NULL
);
5560 gdb_assert (cu
->header
.abbrev_offset
.sect_off
5561 == abbrev_table
->offset
.sect_off
);
5562 cu
->abbrev_table
= abbrev_table
;
5564 else if (cu
->abbrev_table
== NULL
)
5566 dwarf2_read_abbrevs (cu
, abbrev_section
);
5567 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5569 else if (rereading_dwo_cu
)
5571 dwarf2_free_abbrev_table (cu
);
5572 dwarf2_read_abbrevs (cu
, abbrev_section
);
5575 /* Read the top level CU/TU die. */
5576 init_cu_die_reader (&reader
, cu
, section
, NULL
);
5577 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5579 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
5581 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
5582 DWO CU, that this test will fail (the attribute will not be present). */
5583 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5586 struct dwo_unit
*dwo_unit
;
5587 struct die_info
*dwo_comp_unit_die
;
5591 complaint (&symfile_complaints
,
5592 _("compilation unit with DW_AT_GNU_dwo_name"
5593 " has children (offset 0x%x) [in module %s]"),
5594 this_cu
->offset
.sect_off
, bfd_get_filename (abfd
));
5596 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
);
5597 if (dwo_unit
!= NULL
)
5599 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
5600 abbrev_table
!= NULL
,
5601 comp_unit_die
, NULL
,
5603 &dwo_comp_unit_die
, &has_children
) == 0)
5606 do_cleanups (cleanups
);
5609 comp_unit_die
= dwo_comp_unit_die
;
5613 /* Yikes, we couldn't find the rest of the DIE, we only have
5614 the stub. A complaint has already been logged. There's
5615 not much more we can do except pass on the stub DIE to
5616 die_reader_func. We don't want to throw an error on bad
5621 /* All of the above is setup for this call. Yikes. */
5622 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5624 /* Done, clean up. */
5625 if (free_cu_cleanup
!= NULL
)
5629 /* We've successfully allocated this compilation unit. Let our
5630 caller clean it up when finished with it. */
5631 discard_cleanups (free_cu_cleanup
);
5633 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5634 So we have to manually free the abbrev table. */
5635 dwarf2_free_abbrev_table (cu
);
5637 /* Link this CU into read_in_chain. */
5638 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5639 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5642 do_cleanups (free_cu_cleanup
);
5645 do_cleanups (cleanups
);
5648 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present.
5649 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed
5650 to have already done the lookup to find the DWO file).
5652 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
5653 THIS_CU->is_debug_types, but nothing else.
5655 We fill in THIS_CU->length.
5657 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5658 linker) then DIE_READER_FUNC will not get called.
5660 THIS_CU->cu is always freed when done.
5661 This is done in order to not leave THIS_CU->cu in a state where we have
5662 to care whether it refers to the "main" CU or the DWO CU. */
5665 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
5666 struct dwo_file
*dwo_file
,
5667 die_reader_func_ftype
*die_reader_func
,
5670 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5671 struct dwarf2_section_info
*section
= this_cu
->section
;
5672 bfd
*abfd
= get_section_bfd_owner (section
);
5673 struct dwarf2_section_info
*abbrev_section
;
5674 struct dwarf2_cu cu
;
5675 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5676 struct die_reader_specs reader
;
5677 struct cleanup
*cleanups
;
5678 struct die_info
*comp_unit_die
;
5681 if (dwarf_die_debug
)
5682 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5683 this_cu
->is_debug_types
? "type" : "comp",
5684 this_cu
->offset
.sect_off
);
5686 gdb_assert (this_cu
->cu
== NULL
);
5688 abbrev_section
= (dwo_file
!= NULL
5689 ? &dwo_file
->sections
.abbrev
5690 : get_abbrev_section_for_cu (this_cu
));
5692 /* This is cheap if the section is already read in. */
5693 dwarf2_read_section (objfile
, section
);
5695 init_one_comp_unit (&cu
, this_cu
);
5697 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
5699 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
5700 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, section
,
5701 abbrev_section
, info_ptr
,
5702 this_cu
->is_debug_types
);
5704 this_cu
->length
= get_cu_length (&cu
.header
);
5706 /* Skip dummy compilation units. */
5707 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5708 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5710 do_cleanups (cleanups
);
5714 dwarf2_read_abbrevs (&cu
, abbrev_section
);
5715 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
5717 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
);
5718 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5720 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5722 do_cleanups (cleanups
);
5725 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
5726 does not lookup the specified DWO file.
5727 This cannot be used to read DWO files.
5729 THIS_CU->cu is always freed when done.
5730 This is done in order to not leave THIS_CU->cu in a state where we have
5731 to care whether it refers to the "main" CU or the DWO CU.
5732 We can revisit this if the data shows there's a performance issue. */
5735 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
5736 die_reader_func_ftype
*die_reader_func
,
5739 init_cutu_and_read_dies_no_follow (this_cu
, NULL
, die_reader_func
, data
);
5742 /* Type Unit Groups.
5744 Type Unit Groups are a way to collapse the set of all TUs (type units) into
5745 a more manageable set. The grouping is done by DW_AT_stmt_list entry
5746 so that all types coming from the same compilation (.o file) are grouped
5747 together. A future step could be to put the types in the same symtab as
5748 the CU the types ultimately came from. */
5751 hash_type_unit_group (const void *item
)
5753 const struct type_unit_group
*tu_group
5754 = (const struct type_unit_group
*) item
;
5756 return hash_stmt_list_entry (&tu_group
->hash
);
5760 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
5762 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
5763 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
5765 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
5768 /* Allocate a hash table for type unit groups. */
5771 allocate_type_unit_groups_table (void)
5773 return htab_create_alloc_ex (3,
5774 hash_type_unit_group
,
5777 &dwarf2_per_objfile
->objfile
->objfile_obstack
,
5778 hashtab_obstack_allocate
,
5779 dummy_obstack_deallocate
);
5782 /* Type units that don't have DW_AT_stmt_list are grouped into their own
5783 partial symtabs. We combine several TUs per psymtab to not let the size
5784 of any one psymtab grow too big. */
5785 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
5786 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
5788 /* Helper routine for get_type_unit_group.
5789 Create the type_unit_group object used to hold one or more TUs. */
5791 static struct type_unit_group
*
5792 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
5794 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5795 struct dwarf2_per_cu_data
*per_cu
;
5796 struct type_unit_group
*tu_group
;
5798 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5799 struct type_unit_group
);
5800 per_cu
= &tu_group
->per_cu
;
5801 per_cu
->objfile
= objfile
;
5803 if (dwarf2_per_objfile
->using_index
)
5805 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5806 struct dwarf2_per_cu_quick_data
);
5810 unsigned int line_offset
= line_offset_struct
.sect_off
;
5811 struct partial_symtab
*pst
;
5814 /* Give the symtab a useful name for debug purposes. */
5815 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
5816 name
= xstrprintf ("<type_units_%d>",
5817 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
5819 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
5821 pst
= create_partial_symtab (per_cu
, name
);
5827 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
5828 tu_group
->hash
.line_offset
= line_offset_struct
;
5833 /* Look up the type_unit_group for type unit CU, and create it if necessary.
5834 STMT_LIST is a DW_AT_stmt_list attribute. */
5836 static struct type_unit_group
*
5837 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
5839 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
5840 struct type_unit_group
*tu_group
;
5842 unsigned int line_offset
;
5843 struct type_unit_group type_unit_group_for_lookup
;
5845 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
5847 dwarf2_per_objfile
->type_unit_groups
=
5848 allocate_type_unit_groups_table ();
5851 /* Do we need to create a new group, or can we use an existing one? */
5855 line_offset
= DW_UNSND (stmt_list
);
5856 ++tu_stats
->nr_symtab_sharers
;
5860 /* Ugh, no stmt_list. Rare, but we have to handle it.
5861 We can do various things here like create one group per TU or
5862 spread them over multiple groups to split up the expansion work.
5863 To avoid worst case scenarios (too many groups or too large groups)
5864 we, umm, group them in bunches. */
5865 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
5866 | (tu_stats
->nr_stmt_less_type_units
5867 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
5868 ++tu_stats
->nr_stmt_less_type_units
;
5871 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
5872 type_unit_group_for_lookup
.hash
.line_offset
.sect_off
= line_offset
;
5873 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
5874 &type_unit_group_for_lookup
, INSERT
);
5877 tu_group
= (struct type_unit_group
*) *slot
;
5878 gdb_assert (tu_group
!= NULL
);
5882 sect_offset line_offset_struct
;
5884 line_offset_struct
.sect_off
= line_offset
;
5885 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
5887 ++tu_stats
->nr_symtabs
;
5893 /* Partial symbol tables. */
5895 /* Create a psymtab named NAME and assign it to PER_CU.
5897 The caller must fill in the following details:
5898 dirname, textlow, texthigh. */
5900 static struct partial_symtab
*
5901 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
5903 struct objfile
*objfile
= per_cu
->objfile
;
5904 struct partial_symtab
*pst
;
5906 pst
= start_psymtab_common (objfile
, name
, 0,
5907 objfile
->global_psymbols
.next
,
5908 objfile
->static_psymbols
.next
);
5910 pst
->psymtabs_addrmap_supported
= 1;
5912 /* This is the glue that links PST into GDB's symbol API. */
5913 pst
->read_symtab_private
= per_cu
;
5914 pst
->read_symtab
= dwarf2_read_symtab
;
5915 per_cu
->v
.psymtab
= pst
;
5920 /* The DATA object passed to process_psymtab_comp_unit_reader has this
5923 struct process_psymtab_comp_unit_data
5925 /* True if we are reading a DW_TAG_partial_unit. */
5927 int want_partial_unit
;
5929 /* The "pretend" language that is used if the CU doesn't declare a
5932 enum language pretend_language
;
5935 /* die_reader_func for process_psymtab_comp_unit. */
5938 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
5939 const gdb_byte
*info_ptr
,
5940 struct die_info
*comp_unit_die
,
5944 struct dwarf2_cu
*cu
= reader
->cu
;
5945 struct objfile
*objfile
= cu
->objfile
;
5946 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
5947 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
5949 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
5950 struct partial_symtab
*pst
;
5952 const char *filename
;
5953 struct process_psymtab_comp_unit_data
*info
5954 = (struct process_psymtab_comp_unit_data
*) data
;
5956 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !info
->want_partial_unit
)
5959 gdb_assert (! per_cu
->is_debug_types
);
5961 prepare_one_comp_unit (cu
, comp_unit_die
, info
->pretend_language
);
5963 cu
->list_in_scope
= &file_symbols
;
5965 /* Allocate a new partial symbol table structure. */
5966 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
5967 if (filename
== NULL
)
5970 pst
= create_partial_symtab (per_cu
, filename
);
5972 /* This must be done before calling dwarf2_build_include_psymtabs. */
5973 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
5975 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5977 dwarf2_find_base_address (comp_unit_die
, cu
);
5979 /* Possibly set the default values of LOWPC and HIGHPC from
5981 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
5982 &best_highpc
, cu
, pst
);
5983 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
5984 /* Store the contiguous range if it is not empty; it can be empty for
5985 CUs with no code. */
5986 addrmap_set_empty (objfile
->psymtabs_addrmap
,
5987 gdbarch_adjust_dwarf2_addr (gdbarch
,
5988 best_lowpc
+ baseaddr
),
5989 gdbarch_adjust_dwarf2_addr (gdbarch
,
5990 best_highpc
+ baseaddr
) - 1,
5993 /* Check if comp unit has_children.
5994 If so, read the rest of the partial symbols from this comp unit.
5995 If not, there's no more debug_info for this comp unit. */
5998 struct partial_die_info
*first_die
;
5999 CORE_ADDR lowpc
, highpc
;
6001 lowpc
= ((CORE_ADDR
) -1);
6002 highpc
= ((CORE_ADDR
) 0);
6004 first_die
= load_partial_dies (reader
, info_ptr
, 1);
6006 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
6009 /* If we didn't find a lowpc, set it to highpc to avoid
6010 complaints from `maint check'. */
6011 if (lowpc
== ((CORE_ADDR
) -1))
6014 /* If the compilation unit didn't have an explicit address range,
6015 then use the information extracted from its child dies. */
6019 best_highpc
= highpc
;
6022 pst
->textlow
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
);
6023 pst
->texthigh
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
);
6025 end_psymtab_common (objfile
, pst
);
6027 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
6030 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
6031 struct dwarf2_per_cu_data
*iter
;
6033 /* Fill in 'dependencies' here; we fill in 'users' in a
6035 pst
->number_of_dependencies
= len
;
6037 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
6039 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
6042 pst
->dependencies
[i
] = iter
->v
.psymtab
;
6044 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
6047 /* Get the list of files included in the current compilation unit,
6048 and build a psymtab for each of them. */
6049 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
6051 if (dwarf_read_debug
)
6053 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6055 fprintf_unfiltered (gdb_stdlog
,
6056 "Psymtab for %s unit @0x%x: %s - %s"
6057 ", %d global, %d static syms\n",
6058 per_cu
->is_debug_types
? "type" : "comp",
6059 per_cu
->offset
.sect_off
,
6060 paddress (gdbarch
, pst
->textlow
),
6061 paddress (gdbarch
, pst
->texthigh
),
6062 pst
->n_global_syms
, pst
->n_static_syms
);
6066 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6067 Process compilation unit THIS_CU for a psymtab. */
6070 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
6071 int want_partial_unit
,
6072 enum language pretend_language
)
6074 struct process_psymtab_comp_unit_data info
;
6076 /* If this compilation unit was already read in, free the
6077 cached copy in order to read it in again. This is
6078 necessary because we skipped some symbols when we first
6079 read in the compilation unit (see load_partial_dies).
6080 This problem could be avoided, but the benefit is unclear. */
6081 if (this_cu
->cu
!= NULL
)
6082 free_one_cached_comp_unit (this_cu
);
6084 gdb_assert (! this_cu
->is_debug_types
);
6085 info
.want_partial_unit
= want_partial_unit
;
6086 info
.pretend_language
= pretend_language
;
6087 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0,
6088 process_psymtab_comp_unit_reader
,
6091 /* Age out any secondary CUs. */
6092 age_cached_comp_units ();
6095 /* Reader function for build_type_psymtabs. */
6098 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
6099 const gdb_byte
*info_ptr
,
6100 struct die_info
*type_unit_die
,
6104 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6105 struct dwarf2_cu
*cu
= reader
->cu
;
6106 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
6107 struct signatured_type
*sig_type
;
6108 struct type_unit_group
*tu_group
;
6109 struct attribute
*attr
;
6110 struct partial_die_info
*first_die
;
6111 CORE_ADDR lowpc
, highpc
;
6112 struct partial_symtab
*pst
;
6114 gdb_assert (data
== NULL
);
6115 gdb_assert (per_cu
->is_debug_types
);
6116 sig_type
= (struct signatured_type
*) per_cu
;
6121 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
6122 tu_group
= get_type_unit_group (cu
, attr
);
6124 VEC_safe_push (sig_type_ptr
, tu_group
->tus
, sig_type
);
6126 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
6127 cu
->list_in_scope
= &file_symbols
;
6128 pst
= create_partial_symtab (per_cu
, "");
6131 first_die
= load_partial_dies (reader
, info_ptr
, 1);
6133 lowpc
= (CORE_ADDR
) -1;
6134 highpc
= (CORE_ADDR
) 0;
6135 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
6137 end_psymtab_common (objfile
, pst
);
6140 /* Struct used to sort TUs by their abbreviation table offset. */
6142 struct tu_abbrev_offset
6144 struct signatured_type
*sig_type
;
6145 sect_offset abbrev_offset
;
6148 /* Helper routine for build_type_psymtabs_1, passed to qsort. */
6151 sort_tu_by_abbrev_offset (const void *ap
, const void *bp
)
6153 const struct tu_abbrev_offset
* const *a
6154 = (const struct tu_abbrev_offset
* const*) ap
;
6155 const struct tu_abbrev_offset
* const *b
6156 = (const struct tu_abbrev_offset
* const*) bp
;
6157 unsigned int aoff
= (*a
)->abbrev_offset
.sect_off
;
6158 unsigned int boff
= (*b
)->abbrev_offset
.sect_off
;
6160 return (aoff
> boff
) - (aoff
< boff
);
6163 /* Efficiently read all the type units.
6164 This does the bulk of the work for build_type_psymtabs.
6166 The efficiency is because we sort TUs by the abbrev table they use and
6167 only read each abbrev table once. In one program there are 200K TUs
6168 sharing 8K abbrev tables.
6170 The main purpose of this function is to support building the
6171 dwarf2_per_objfile->type_unit_groups table.
6172 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
6173 can collapse the search space by grouping them by stmt_list.
6174 The savings can be significant, in the same program from above the 200K TUs
6175 share 8K stmt_list tables.
6177 FUNC is expected to call get_type_unit_group, which will create the
6178 struct type_unit_group if necessary and add it to
6179 dwarf2_per_objfile->type_unit_groups. */
6182 build_type_psymtabs_1 (void)
6184 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6185 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6186 struct cleanup
*cleanups
;
6187 struct abbrev_table
*abbrev_table
;
6188 sect_offset abbrev_offset
;
6189 struct tu_abbrev_offset
*sorted_by_abbrev
;
6190 struct type_unit_group
**iter
;
6193 /* It's up to the caller to not call us multiple times. */
6194 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
6196 if (dwarf2_per_objfile
->n_type_units
== 0)
6199 /* TUs typically share abbrev tables, and there can be way more TUs than
6200 abbrev tables. Sort by abbrev table to reduce the number of times we
6201 read each abbrev table in.
6202 Alternatives are to punt or to maintain a cache of abbrev tables.
6203 This is simpler and efficient enough for now.
6205 Later we group TUs by their DW_AT_stmt_list value (as this defines the
6206 symtab to use). Typically TUs with the same abbrev offset have the same
6207 stmt_list value too so in practice this should work well.
6209 The basic algorithm here is:
6211 sort TUs by abbrev table
6212 for each TU with same abbrev table:
6213 read abbrev table if first user
6214 read TU top level DIE
6215 [IWBN if DWO skeletons had DW_AT_stmt_list]
6218 if (dwarf_read_debug
)
6219 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
6221 /* Sort in a separate table to maintain the order of all_type_units
6222 for .gdb_index: TU indices directly index all_type_units. */
6223 sorted_by_abbrev
= XNEWVEC (struct tu_abbrev_offset
,
6224 dwarf2_per_objfile
->n_type_units
);
6225 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6227 struct signatured_type
*sig_type
= dwarf2_per_objfile
->all_type_units
[i
];
6229 sorted_by_abbrev
[i
].sig_type
= sig_type
;
6230 sorted_by_abbrev
[i
].abbrev_offset
=
6231 read_abbrev_offset (sig_type
->per_cu
.section
,
6232 sig_type
->per_cu
.offset
);
6234 cleanups
= make_cleanup (xfree
, sorted_by_abbrev
);
6235 qsort (sorted_by_abbrev
, dwarf2_per_objfile
->n_type_units
,
6236 sizeof (struct tu_abbrev_offset
), sort_tu_by_abbrev_offset
);
6238 abbrev_offset
.sect_off
= ~(unsigned) 0;
6239 abbrev_table
= NULL
;
6240 make_cleanup (abbrev_table_free_cleanup
, &abbrev_table
);
6242 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6244 const struct tu_abbrev_offset
*tu
= &sorted_by_abbrev
[i
];
6246 /* Switch to the next abbrev table if necessary. */
6247 if (abbrev_table
== NULL
6248 || tu
->abbrev_offset
.sect_off
!= abbrev_offset
.sect_off
)
6250 if (abbrev_table
!= NULL
)
6252 abbrev_table_free (abbrev_table
);
6253 /* Reset to NULL in case abbrev_table_read_table throws
6254 an error: abbrev_table_free_cleanup will get called. */
6255 abbrev_table
= NULL
;
6257 abbrev_offset
= tu
->abbrev_offset
;
6259 abbrev_table_read_table (&dwarf2_per_objfile
->abbrev
,
6261 ++tu_stats
->nr_uniq_abbrev_tables
;
6264 init_cutu_and_read_dies (&tu
->sig_type
->per_cu
, abbrev_table
, 0, 0,
6265 build_type_psymtabs_reader
, NULL
);
6268 do_cleanups (cleanups
);
6271 /* Print collected type unit statistics. */
6274 print_tu_stats (void)
6276 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6278 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
6279 fprintf_unfiltered (gdb_stdlog
, " %d TUs\n",
6280 dwarf2_per_objfile
->n_type_units
);
6281 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
6282 tu_stats
->nr_uniq_abbrev_tables
);
6283 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
6284 tu_stats
->nr_symtabs
);
6285 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
6286 tu_stats
->nr_symtab_sharers
);
6287 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
6288 tu_stats
->nr_stmt_less_type_units
);
6289 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
6290 tu_stats
->nr_all_type_units_reallocs
);
6293 /* Traversal function for build_type_psymtabs. */
6296 build_type_psymtab_dependencies (void **slot
, void *info
)
6298 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6299 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
6300 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
6301 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6302 int len
= VEC_length (sig_type_ptr
, tu_group
->tus
);
6303 struct signatured_type
*iter
;
6306 gdb_assert (len
> 0);
6307 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
6309 pst
->number_of_dependencies
= len
;
6311 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
6313 VEC_iterate (sig_type_ptr
, tu_group
->tus
, i
, iter
);
6316 gdb_assert (iter
->per_cu
.is_debug_types
);
6317 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
6318 iter
->type_unit_group
= tu_group
;
6321 VEC_free (sig_type_ptr
, tu_group
->tus
);
6326 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6327 Build partial symbol tables for the .debug_types comp-units. */
6330 build_type_psymtabs (struct objfile
*objfile
)
6332 if (! create_all_type_units (objfile
))
6335 build_type_psymtabs_1 ();
6338 /* Traversal function for process_skeletonless_type_unit.
6339 Read a TU in a DWO file and build partial symbols for it. */
6342 process_skeletonless_type_unit (void **slot
, void *info
)
6344 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
6345 struct objfile
*objfile
= (struct objfile
*) info
;
6346 struct signatured_type find_entry
, *entry
;
6348 /* If this TU doesn't exist in the global table, add it and read it in. */
6350 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6352 dwarf2_per_objfile
->signatured_types
6353 = allocate_signatured_type_table (objfile
);
6356 find_entry
.signature
= dwo_unit
->signature
;
6357 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
, &find_entry
,
6359 /* If we've already seen this type there's nothing to do. What's happening
6360 is we're doing our own version of comdat-folding here. */
6364 /* This does the job that create_all_type_units would have done for
6366 entry
= add_type_unit (dwo_unit
->signature
, slot
);
6367 fill_in_sig_entry_from_dwo_entry (objfile
, entry
, dwo_unit
);
6370 /* This does the job that build_type_psymtabs_1 would have done. */
6371 init_cutu_and_read_dies (&entry
->per_cu
, NULL
, 0, 0,
6372 build_type_psymtabs_reader
, NULL
);
6377 /* Traversal function for process_skeletonless_type_units. */
6380 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
6382 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
6384 if (dwo_file
->tus
!= NULL
)
6386 htab_traverse_noresize (dwo_file
->tus
,
6387 process_skeletonless_type_unit
, info
);
6393 /* Scan all TUs of DWO files, verifying we've processed them.
6394 This is needed in case a TU was emitted without its skeleton.
6395 Note: This can't be done until we know what all the DWO files are. */
6398 process_skeletonless_type_units (struct objfile
*objfile
)
6400 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
6401 if (get_dwp_file () == NULL
6402 && dwarf2_per_objfile
->dwo_files
!= NULL
)
6404 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
,
6405 process_dwo_file_for_skeletonless_type_units
,
6410 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
6413 psymtabs_addrmap_cleanup (void *o
)
6415 struct objfile
*objfile
= (struct objfile
*) o
;
6417 objfile
->psymtabs_addrmap
= NULL
;
6420 /* Compute the 'user' field for each psymtab in OBJFILE. */
6423 set_partial_user (struct objfile
*objfile
)
6427 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6429 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6430 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6436 for (j
= 0; j
< pst
->number_of_dependencies
; ++j
)
6438 /* Set the 'user' field only if it is not already set. */
6439 if (pst
->dependencies
[j
]->user
== NULL
)
6440 pst
->dependencies
[j
]->user
= pst
;
6445 /* Build the partial symbol table by doing a quick pass through the
6446 .debug_info and .debug_abbrev sections. */
6449 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
6451 struct cleanup
*back_to
, *addrmap_cleanup
;
6452 struct obstack temp_obstack
;
6455 if (dwarf_read_debug
)
6457 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
6458 objfile_name (objfile
));
6461 dwarf2_per_objfile
->reading_partial_symbols
= 1;
6463 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
6465 /* Any cached compilation units will be linked by the per-objfile
6466 read_in_chain. Make sure to free them when we're done. */
6467 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
6469 build_type_psymtabs (objfile
);
6471 create_all_comp_units (objfile
);
6473 /* Create a temporary address map on a temporary obstack. We later
6474 copy this to the final obstack. */
6475 obstack_init (&temp_obstack
);
6476 make_cleanup_obstack_free (&temp_obstack
);
6477 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
6478 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
6480 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6482 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6484 process_psymtab_comp_unit (per_cu
, 0, language_minimal
);
6487 /* This has to wait until we read the CUs, we need the list of DWOs. */
6488 process_skeletonless_type_units (objfile
);
6490 /* Now that all TUs have been processed we can fill in the dependencies. */
6491 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
6493 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
6494 build_type_psymtab_dependencies
, NULL
);
6497 if (dwarf_read_debug
)
6500 set_partial_user (objfile
);
6502 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
6503 &objfile
->objfile_obstack
);
6504 discard_cleanups (addrmap_cleanup
);
6506 do_cleanups (back_to
);
6508 if (dwarf_read_debug
)
6509 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
6510 objfile_name (objfile
));
6513 /* die_reader_func for load_partial_comp_unit. */
6516 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
6517 const gdb_byte
*info_ptr
,
6518 struct die_info
*comp_unit_die
,
6522 struct dwarf2_cu
*cu
= reader
->cu
;
6524 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
6526 /* Check if comp unit has_children.
6527 If so, read the rest of the partial symbols from this comp unit.
6528 If not, there's no more debug_info for this comp unit. */
6530 load_partial_dies (reader
, info_ptr
, 0);
6533 /* Load the partial DIEs for a secondary CU into memory.
6534 This is also used when rereading a primary CU with load_all_dies. */
6537 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
6539 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
6540 load_partial_comp_unit_reader
, NULL
);
6544 read_comp_units_from_section (struct objfile
*objfile
,
6545 struct dwarf2_section_info
*section
,
6546 unsigned int is_dwz
,
6549 struct dwarf2_per_cu_data
***all_comp_units
)
6551 const gdb_byte
*info_ptr
;
6552 bfd
*abfd
= get_section_bfd_owner (section
);
6554 if (dwarf_read_debug
)
6555 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
6556 get_section_name (section
),
6557 get_section_file_name (section
));
6559 dwarf2_read_section (objfile
, section
);
6561 info_ptr
= section
->buffer
;
6563 while (info_ptr
< section
->buffer
+ section
->size
)
6565 unsigned int length
, initial_length_size
;
6566 struct dwarf2_per_cu_data
*this_cu
;
6569 offset
.sect_off
= info_ptr
- section
->buffer
;
6571 /* Read just enough information to find out where the next
6572 compilation unit is. */
6573 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6575 /* Save the compilation unit for later lookup. */
6576 this_cu
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_per_cu_data
);
6577 memset (this_cu
, 0, sizeof (*this_cu
));
6578 this_cu
->offset
= offset
;
6579 this_cu
->length
= length
+ initial_length_size
;
6580 this_cu
->is_dwz
= is_dwz
;
6581 this_cu
->objfile
= objfile
;
6582 this_cu
->section
= section
;
6584 if (*n_comp_units
== *n_allocated
)
6587 *all_comp_units
= XRESIZEVEC (struct dwarf2_per_cu_data
*,
6588 *all_comp_units
, *n_allocated
);
6590 (*all_comp_units
)[*n_comp_units
] = this_cu
;
6593 info_ptr
= info_ptr
+ this_cu
->length
;
6597 /* Create a list of all compilation units in OBJFILE.
6598 This is only done for -readnow and building partial symtabs. */
6601 create_all_comp_units (struct objfile
*objfile
)
6605 struct dwarf2_per_cu_data
**all_comp_units
;
6606 struct dwz_file
*dwz
;
6610 all_comp_units
= XNEWVEC (struct dwarf2_per_cu_data
*, n_allocated
);
6612 read_comp_units_from_section (objfile
, &dwarf2_per_objfile
->info
, 0,
6613 &n_allocated
, &n_comp_units
, &all_comp_units
);
6615 dwz
= dwarf2_get_dwz_file ();
6617 read_comp_units_from_section (objfile
, &dwz
->info
, 1,
6618 &n_allocated
, &n_comp_units
,
6621 dwarf2_per_objfile
->all_comp_units
= XOBNEWVEC (&objfile
->objfile_obstack
,
6622 struct dwarf2_per_cu_data
*,
6624 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
6625 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
6626 xfree (all_comp_units
);
6627 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
6630 /* Process all loaded DIEs for compilation unit CU, starting at
6631 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
6632 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
6633 DW_AT_ranges). See the comments of add_partial_subprogram on how
6634 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
6637 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
6638 CORE_ADDR
*highpc
, int set_addrmap
,
6639 struct dwarf2_cu
*cu
)
6641 struct partial_die_info
*pdi
;
6643 /* Now, march along the PDI's, descending into ones which have
6644 interesting children but skipping the children of the other ones,
6645 until we reach the end of the compilation unit. */
6651 fixup_partial_die (pdi
, cu
);
6653 /* Anonymous namespaces or modules have no name but have interesting
6654 children, so we need to look at them. Ditto for anonymous
6657 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
6658 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
6659 || pdi
->tag
== DW_TAG_imported_unit
)
6663 case DW_TAG_subprogram
:
6664 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6666 case DW_TAG_constant
:
6667 case DW_TAG_variable
:
6668 case DW_TAG_typedef
:
6669 case DW_TAG_union_type
:
6670 if (!pdi
->is_declaration
)
6672 add_partial_symbol (pdi
, cu
);
6675 case DW_TAG_class_type
:
6676 case DW_TAG_interface_type
:
6677 case DW_TAG_structure_type
:
6678 if (!pdi
->is_declaration
)
6680 add_partial_symbol (pdi
, cu
);
6683 case DW_TAG_enumeration_type
:
6684 if (!pdi
->is_declaration
)
6685 add_partial_enumeration (pdi
, cu
);
6687 case DW_TAG_base_type
:
6688 case DW_TAG_subrange_type
:
6689 /* File scope base type definitions are added to the partial
6691 add_partial_symbol (pdi
, cu
);
6693 case DW_TAG_namespace
:
6694 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6697 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6699 case DW_TAG_imported_unit
:
6701 struct dwarf2_per_cu_data
*per_cu
;
6703 /* For now we don't handle imported units in type units. */
6704 if (cu
->per_cu
->is_debug_types
)
6706 error (_("Dwarf Error: DW_TAG_imported_unit is not"
6707 " supported in type units [in module %s]"),
6708 objfile_name (cu
->objfile
));
6711 per_cu
= dwarf2_find_containing_comp_unit (pdi
->d
.offset
,
6715 /* Go read the partial unit, if needed. */
6716 if (per_cu
->v
.psymtab
== NULL
)
6717 process_psymtab_comp_unit (per_cu
, 1, cu
->language
);
6719 VEC_safe_push (dwarf2_per_cu_ptr
,
6720 cu
->per_cu
->imported_symtabs
, per_cu
);
6723 case DW_TAG_imported_declaration
:
6724 add_partial_symbol (pdi
, cu
);
6731 /* If the die has a sibling, skip to the sibling. */
6733 pdi
= pdi
->die_sibling
;
6737 /* Functions used to compute the fully scoped name of a partial DIE.
6739 Normally, this is simple. For C++, the parent DIE's fully scoped
6740 name is concatenated with "::" and the partial DIE's name. For
6741 Java, the same thing occurs except that "." is used instead of "::".
6742 Enumerators are an exception; they use the scope of their parent
6743 enumeration type, i.e. the name of the enumeration type is not
6744 prepended to the enumerator.
6746 There are two complexities. One is DW_AT_specification; in this
6747 case "parent" means the parent of the target of the specification,
6748 instead of the direct parent of the DIE. The other is compilers
6749 which do not emit DW_TAG_namespace; in this case we try to guess
6750 the fully qualified name of structure types from their members'
6751 linkage names. This must be done using the DIE's children rather
6752 than the children of any DW_AT_specification target. We only need
6753 to do this for structures at the top level, i.e. if the target of
6754 any DW_AT_specification (if any; otherwise the DIE itself) does not
6757 /* Compute the scope prefix associated with PDI's parent, in
6758 compilation unit CU. The result will be allocated on CU's
6759 comp_unit_obstack, or a copy of the already allocated PDI->NAME
6760 field. NULL is returned if no prefix is necessary. */
6762 partial_die_parent_scope (struct partial_die_info
*pdi
,
6763 struct dwarf2_cu
*cu
)
6765 const char *grandparent_scope
;
6766 struct partial_die_info
*parent
, *real_pdi
;
6768 /* We need to look at our parent DIE; if we have a DW_AT_specification,
6769 then this means the parent of the specification DIE. */
6772 while (real_pdi
->has_specification
)
6773 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
6774 real_pdi
->spec_is_dwz
, cu
);
6776 parent
= real_pdi
->die_parent
;
6780 if (parent
->scope_set
)
6781 return parent
->scope
;
6783 fixup_partial_die (parent
, cu
);
6785 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
6787 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
6788 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
6789 Work around this problem here. */
6790 if (cu
->language
== language_cplus
6791 && parent
->tag
== DW_TAG_namespace
6792 && strcmp (parent
->name
, "::") == 0
6793 && grandparent_scope
== NULL
)
6795 parent
->scope
= NULL
;
6796 parent
->scope_set
= 1;
6800 if (pdi
->tag
== DW_TAG_enumerator
)
6801 /* Enumerators should not get the name of the enumeration as a prefix. */
6802 parent
->scope
= grandparent_scope
;
6803 else if (parent
->tag
== DW_TAG_namespace
6804 || parent
->tag
== DW_TAG_module
6805 || parent
->tag
== DW_TAG_structure_type
6806 || parent
->tag
== DW_TAG_class_type
6807 || parent
->tag
== DW_TAG_interface_type
6808 || parent
->tag
== DW_TAG_union_type
6809 || parent
->tag
== DW_TAG_enumeration_type
)
6811 if (grandparent_scope
== NULL
)
6812 parent
->scope
= parent
->name
;
6814 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
6816 parent
->name
, 0, cu
);
6820 /* FIXME drow/2004-04-01: What should we be doing with
6821 function-local names? For partial symbols, we should probably be
6823 complaint (&symfile_complaints
,
6824 _("unhandled containing DIE tag %d for DIE at %d"),
6825 parent
->tag
, pdi
->offset
.sect_off
);
6826 parent
->scope
= grandparent_scope
;
6829 parent
->scope_set
= 1;
6830 return parent
->scope
;
6833 /* Return the fully scoped name associated with PDI, from compilation unit
6834 CU. The result will be allocated with malloc. */
6837 partial_die_full_name (struct partial_die_info
*pdi
,
6838 struct dwarf2_cu
*cu
)
6840 const char *parent_scope
;
6842 /* If this is a template instantiation, we can not work out the
6843 template arguments from partial DIEs. So, unfortunately, we have
6844 to go through the full DIEs. At least any work we do building
6845 types here will be reused if full symbols are loaded later. */
6846 if (pdi
->has_template_arguments
)
6848 fixup_partial_die (pdi
, cu
);
6850 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
6852 struct die_info
*die
;
6853 struct attribute attr
;
6854 struct dwarf2_cu
*ref_cu
= cu
;
6856 /* DW_FORM_ref_addr is using section offset. */
6857 attr
.name
= (enum dwarf_attribute
) 0;
6858 attr
.form
= DW_FORM_ref_addr
;
6859 attr
.u
.unsnd
= pdi
->offset
.sect_off
;
6860 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
6862 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
6866 parent_scope
= partial_die_parent_scope (pdi
, cu
);
6867 if (parent_scope
== NULL
)
6870 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
6874 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
6876 struct objfile
*objfile
= cu
->objfile
;
6877 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6879 const char *actual_name
= NULL
;
6881 char *built_actual_name
;
6883 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6885 built_actual_name
= partial_die_full_name (pdi
, cu
);
6886 if (built_actual_name
!= NULL
)
6887 actual_name
= built_actual_name
;
6889 if (actual_name
== NULL
)
6890 actual_name
= pdi
->name
;
6894 case DW_TAG_subprogram
:
6895 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
);
6896 if (pdi
->is_external
|| cu
->language
== language_ada
)
6898 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
6899 of the global scope. But in Ada, we want to be able to access
6900 nested procedures globally. So all Ada subprograms are stored
6901 in the global scope. */
6902 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6903 built_actual_name
!= NULL
,
6904 VAR_DOMAIN
, LOC_BLOCK
,
6905 &objfile
->global_psymbols
,
6906 addr
, cu
->language
, objfile
);
6910 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6911 built_actual_name
!= NULL
,
6912 VAR_DOMAIN
, LOC_BLOCK
,
6913 &objfile
->static_psymbols
,
6914 addr
, cu
->language
, objfile
);
6917 case DW_TAG_constant
:
6919 struct psymbol_allocation_list
*list
;
6921 if (pdi
->is_external
)
6922 list
= &objfile
->global_psymbols
;
6924 list
= &objfile
->static_psymbols
;
6925 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6926 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
6927 list
, 0, cu
->language
, objfile
);
6930 case DW_TAG_variable
:
6932 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
6936 && !dwarf2_per_objfile
->has_section_at_zero
)
6938 /* A global or static variable may also have been stripped
6939 out by the linker if unused, in which case its address
6940 will be nullified; do not add such variables into partial
6941 symbol table then. */
6943 else if (pdi
->is_external
)
6946 Don't enter into the minimal symbol tables as there is
6947 a minimal symbol table entry from the ELF symbols already.
6948 Enter into partial symbol table if it has a location
6949 descriptor or a type.
6950 If the location descriptor is missing, new_symbol will create
6951 a LOC_UNRESOLVED symbol, the address of the variable will then
6952 be determined from the minimal symbol table whenever the variable
6954 The address for the partial symbol table entry is not
6955 used by GDB, but it comes in handy for debugging partial symbol
6958 if (pdi
->d
.locdesc
|| pdi
->has_type
)
6959 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6960 built_actual_name
!= NULL
,
6961 VAR_DOMAIN
, LOC_STATIC
,
6962 &objfile
->global_psymbols
,
6964 cu
->language
, objfile
);
6968 int has_loc
= pdi
->d
.locdesc
!= NULL
;
6970 /* Static Variable. Skip symbols whose value we cannot know (those
6971 without location descriptors or constant values). */
6972 if (!has_loc
&& !pdi
->has_const_value
)
6974 xfree (built_actual_name
);
6978 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6979 built_actual_name
!= NULL
,
6980 VAR_DOMAIN
, LOC_STATIC
,
6981 &objfile
->static_psymbols
,
6982 has_loc
? addr
+ baseaddr
: (CORE_ADDR
) 0,
6983 cu
->language
, objfile
);
6986 case DW_TAG_typedef
:
6987 case DW_TAG_base_type
:
6988 case DW_TAG_subrange_type
:
6989 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6990 built_actual_name
!= NULL
,
6991 VAR_DOMAIN
, LOC_TYPEDEF
,
6992 &objfile
->static_psymbols
,
6993 0, cu
->language
, objfile
);
6995 case DW_TAG_imported_declaration
:
6996 case DW_TAG_namespace
:
6997 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6998 built_actual_name
!= NULL
,
6999 VAR_DOMAIN
, LOC_TYPEDEF
,
7000 &objfile
->global_psymbols
,
7001 0, cu
->language
, objfile
);
7004 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7005 built_actual_name
!= NULL
,
7006 MODULE_DOMAIN
, LOC_TYPEDEF
,
7007 &objfile
->global_psymbols
,
7008 0, cu
->language
, objfile
);
7010 case DW_TAG_class_type
:
7011 case DW_TAG_interface_type
:
7012 case DW_TAG_structure_type
:
7013 case DW_TAG_union_type
:
7014 case DW_TAG_enumeration_type
:
7015 /* Skip external references. The DWARF standard says in the section
7016 about "Structure, Union, and Class Type Entries": "An incomplete
7017 structure, union or class type is represented by a structure,
7018 union or class entry that does not have a byte size attribute
7019 and that has a DW_AT_declaration attribute." */
7020 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
7022 xfree (built_actual_name
);
7026 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
7027 static vs. global. */
7028 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7029 built_actual_name
!= NULL
,
7030 STRUCT_DOMAIN
, LOC_TYPEDEF
,
7031 (cu
->language
== language_cplus
7032 || cu
->language
== language_java
)
7033 ? &objfile
->global_psymbols
7034 : &objfile
->static_psymbols
,
7035 0, cu
->language
, objfile
);
7038 case DW_TAG_enumerator
:
7039 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7040 built_actual_name
!= NULL
,
7041 VAR_DOMAIN
, LOC_CONST
,
7042 (cu
->language
== language_cplus
7043 || cu
->language
== language_java
)
7044 ? &objfile
->global_psymbols
7045 : &objfile
->static_psymbols
,
7046 0, cu
->language
, objfile
);
7052 xfree (built_actual_name
);
7055 /* Read a partial die corresponding to a namespace; also, add a symbol
7056 corresponding to that namespace to the symbol table. NAMESPACE is
7057 the name of the enclosing namespace. */
7060 add_partial_namespace (struct partial_die_info
*pdi
,
7061 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7062 int set_addrmap
, struct dwarf2_cu
*cu
)
7064 /* Add a symbol for the namespace. */
7066 add_partial_symbol (pdi
, cu
);
7068 /* Now scan partial symbols in that namespace. */
7070 if (pdi
->has_children
)
7071 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7074 /* Read a partial die corresponding to a Fortran module. */
7077 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
7078 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
7080 /* Add a symbol for the namespace. */
7082 add_partial_symbol (pdi
, cu
);
7084 /* Now scan partial symbols in that module. */
7086 if (pdi
->has_children
)
7087 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7090 /* Read a partial die corresponding to a subprogram and create a partial
7091 symbol for that subprogram. When the CU language allows it, this
7092 routine also defines a partial symbol for each nested subprogram
7093 that this subprogram contains. If SET_ADDRMAP is true, record the
7094 covered ranges in the addrmap. Set *LOWPC and *HIGHPC to the lowest
7095 and highest PC values found in PDI.
7097 PDI may also be a lexical block, in which case we simply search
7098 recursively for subprograms defined inside that lexical block.
7099 Again, this is only performed when the CU language allows this
7100 type of definitions. */
7103 add_partial_subprogram (struct partial_die_info
*pdi
,
7104 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7105 int set_addrmap
, struct dwarf2_cu
*cu
)
7107 if (pdi
->tag
== DW_TAG_subprogram
)
7109 if (pdi
->has_pc_info
)
7111 if (pdi
->lowpc
< *lowpc
)
7112 *lowpc
= pdi
->lowpc
;
7113 if (pdi
->highpc
> *highpc
)
7114 *highpc
= pdi
->highpc
;
7117 struct objfile
*objfile
= cu
->objfile
;
7118 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7123 baseaddr
= ANOFFSET (objfile
->section_offsets
,
7124 SECT_OFF_TEXT (objfile
));
7125 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7126 pdi
->lowpc
+ baseaddr
);
7127 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7128 pdi
->highpc
+ baseaddr
);
7129 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
7130 cu
->per_cu
->v
.psymtab
);
7134 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
7136 if (!pdi
->is_declaration
)
7137 /* Ignore subprogram DIEs that do not have a name, they are
7138 illegal. Do not emit a complaint at this point, we will
7139 do so when we convert this psymtab into a symtab. */
7141 add_partial_symbol (pdi
, cu
);
7145 if (! pdi
->has_children
)
7148 if (cu
->language
== language_ada
)
7150 pdi
= pdi
->die_child
;
7153 fixup_partial_die (pdi
, cu
);
7154 if (pdi
->tag
== DW_TAG_subprogram
7155 || pdi
->tag
== DW_TAG_lexical_block
)
7156 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
7157 pdi
= pdi
->die_sibling
;
7162 /* Read a partial die corresponding to an enumeration type. */
7165 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
7166 struct dwarf2_cu
*cu
)
7168 struct partial_die_info
*pdi
;
7170 if (enum_pdi
->name
!= NULL
)
7171 add_partial_symbol (enum_pdi
, cu
);
7173 pdi
= enum_pdi
->die_child
;
7176 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
7177 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
7179 add_partial_symbol (pdi
, cu
);
7180 pdi
= pdi
->die_sibling
;
7184 /* Return the initial uleb128 in the die at INFO_PTR. */
7187 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
7189 unsigned int bytes_read
;
7191 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7194 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
7195 Return the corresponding abbrev, or NULL if the number is zero (indicating
7196 an empty DIE). In either case *BYTES_READ will be set to the length of
7197 the initial number. */
7199 static struct abbrev_info
*
7200 peek_die_abbrev (const gdb_byte
*info_ptr
, unsigned int *bytes_read
,
7201 struct dwarf2_cu
*cu
)
7203 bfd
*abfd
= cu
->objfile
->obfd
;
7204 unsigned int abbrev_number
;
7205 struct abbrev_info
*abbrev
;
7207 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
7209 if (abbrev_number
== 0)
7212 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
7215 error (_("Dwarf Error: Could not find abbrev number %d in %s"
7216 " at offset 0x%x [in module %s]"),
7217 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
7218 cu
->header
.offset
.sect_off
, bfd_get_filename (abfd
));
7224 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7225 Returns a pointer to the end of a series of DIEs, terminated by an empty
7226 DIE. Any children of the skipped DIEs will also be skipped. */
7228 static const gdb_byte
*
7229 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
7231 struct dwarf2_cu
*cu
= reader
->cu
;
7232 struct abbrev_info
*abbrev
;
7233 unsigned int bytes_read
;
7237 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
7239 return info_ptr
+ bytes_read
;
7241 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
7245 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7246 INFO_PTR should point just after the initial uleb128 of a DIE, and the
7247 abbrev corresponding to that skipped uleb128 should be passed in
7248 ABBREV. Returns a pointer to this DIE's sibling, skipping any
7251 static const gdb_byte
*
7252 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
7253 struct abbrev_info
*abbrev
)
7255 unsigned int bytes_read
;
7256 struct attribute attr
;
7257 bfd
*abfd
= reader
->abfd
;
7258 struct dwarf2_cu
*cu
= reader
->cu
;
7259 const gdb_byte
*buffer
= reader
->buffer
;
7260 const gdb_byte
*buffer_end
= reader
->buffer_end
;
7261 const gdb_byte
*start_info_ptr
= info_ptr
;
7262 unsigned int form
, i
;
7264 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
7266 /* The only abbrev we care about is DW_AT_sibling. */
7267 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
7269 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
7270 if (attr
.form
== DW_FORM_ref_addr
)
7271 complaint (&symfile_complaints
,
7272 _("ignoring absolute DW_AT_sibling"));
7275 unsigned int off
= dwarf2_get_ref_die_offset (&attr
).sect_off
;
7276 const gdb_byte
*sibling_ptr
= buffer
+ off
;
7278 if (sibling_ptr
< info_ptr
)
7279 complaint (&symfile_complaints
,
7280 _("DW_AT_sibling points backwards"));
7281 else if (sibling_ptr
> reader
->buffer_end
)
7282 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
7288 /* If it isn't DW_AT_sibling, skip this attribute. */
7289 form
= abbrev
->attrs
[i
].form
;
7293 case DW_FORM_ref_addr
:
7294 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
7295 and later it is offset sized. */
7296 if (cu
->header
.version
== 2)
7297 info_ptr
+= cu
->header
.addr_size
;
7299 info_ptr
+= cu
->header
.offset_size
;
7301 case DW_FORM_GNU_ref_alt
:
7302 info_ptr
+= cu
->header
.offset_size
;
7305 info_ptr
+= cu
->header
.addr_size
;
7312 case DW_FORM_flag_present
:
7324 case DW_FORM_ref_sig8
:
7327 case DW_FORM_string
:
7328 read_direct_string (abfd
, info_ptr
, &bytes_read
);
7329 info_ptr
+= bytes_read
;
7331 case DW_FORM_sec_offset
:
7333 case DW_FORM_GNU_strp_alt
:
7334 info_ptr
+= cu
->header
.offset_size
;
7336 case DW_FORM_exprloc
:
7338 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7339 info_ptr
+= bytes_read
;
7341 case DW_FORM_block1
:
7342 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
7344 case DW_FORM_block2
:
7345 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
7347 case DW_FORM_block4
:
7348 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
7352 case DW_FORM_ref_udata
:
7353 case DW_FORM_GNU_addr_index
:
7354 case DW_FORM_GNU_str_index
:
7355 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
7357 case DW_FORM_indirect
:
7358 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7359 info_ptr
+= bytes_read
;
7360 /* We need to continue parsing from here, so just go back to
7362 goto skip_attribute
;
7365 error (_("Dwarf Error: Cannot handle %s "
7366 "in DWARF reader [in module %s]"),
7367 dwarf_form_name (form
),
7368 bfd_get_filename (abfd
));
7372 if (abbrev
->has_children
)
7373 return skip_children (reader
, info_ptr
);
7378 /* Locate ORIG_PDI's sibling.
7379 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
7381 static const gdb_byte
*
7382 locate_pdi_sibling (const struct die_reader_specs
*reader
,
7383 struct partial_die_info
*orig_pdi
,
7384 const gdb_byte
*info_ptr
)
7386 /* Do we know the sibling already? */
7388 if (orig_pdi
->sibling
)
7389 return orig_pdi
->sibling
;
7391 /* Are there any children to deal with? */
7393 if (!orig_pdi
->has_children
)
7396 /* Skip the children the long way. */
7398 return skip_children (reader
, info_ptr
);
7401 /* Expand this partial symbol table into a full symbol table. SELF is
7405 dwarf2_read_symtab (struct partial_symtab
*self
,
7406 struct objfile
*objfile
)
7410 warning (_("bug: psymtab for %s is already read in."),
7417 printf_filtered (_("Reading in symbols for %s..."),
7419 gdb_flush (gdb_stdout
);
7422 /* Restore our global data. */
7424 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
7425 dwarf2_objfile_data_key
);
7427 /* If this psymtab is constructed from a debug-only objfile, the
7428 has_section_at_zero flag will not necessarily be correct. We
7429 can get the correct value for this flag by looking at the data
7430 associated with the (presumably stripped) associated objfile. */
7431 if (objfile
->separate_debug_objfile_backlink
)
7433 struct dwarf2_per_objfile
*dpo_backlink
7434 = ((struct dwarf2_per_objfile
*)
7435 objfile_data (objfile
->separate_debug_objfile_backlink
,
7436 dwarf2_objfile_data_key
));
7438 dwarf2_per_objfile
->has_section_at_zero
7439 = dpo_backlink
->has_section_at_zero
;
7442 dwarf2_per_objfile
->reading_partial_symbols
= 0;
7444 psymtab_to_symtab_1 (self
);
7446 /* Finish up the debug error message. */
7448 printf_filtered (_("done.\n"));
7451 process_cu_includes ();
7454 /* Reading in full CUs. */
7456 /* Add PER_CU to the queue. */
7459 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
7460 enum language pretend_language
)
7462 struct dwarf2_queue_item
*item
;
7465 item
= XNEW (struct dwarf2_queue_item
);
7466 item
->per_cu
= per_cu
;
7467 item
->pretend_language
= pretend_language
;
7470 if (dwarf2_queue
== NULL
)
7471 dwarf2_queue
= item
;
7473 dwarf2_queue_tail
->next
= item
;
7475 dwarf2_queue_tail
= item
;
7478 /* If PER_CU is not yet queued, add it to the queue.
7479 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
7481 The result is non-zero if PER_CU was queued, otherwise the result is zero
7482 meaning either PER_CU is already queued or it is already loaded.
7484 N.B. There is an invariant here that if a CU is queued then it is loaded.
7485 The caller is required to load PER_CU if we return non-zero. */
7488 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
7489 struct dwarf2_per_cu_data
*per_cu
,
7490 enum language pretend_language
)
7492 /* We may arrive here during partial symbol reading, if we need full
7493 DIEs to process an unusual case (e.g. template arguments). Do
7494 not queue PER_CU, just tell our caller to load its DIEs. */
7495 if (dwarf2_per_objfile
->reading_partial_symbols
)
7497 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
7502 /* Mark the dependence relation so that we don't flush PER_CU
7504 if (dependent_cu
!= NULL
)
7505 dwarf2_add_dependence (dependent_cu
, per_cu
);
7507 /* If it's already on the queue, we have nothing to do. */
7511 /* If the compilation unit is already loaded, just mark it as
7513 if (per_cu
->cu
!= NULL
)
7515 per_cu
->cu
->last_used
= 0;
7519 /* Add it to the queue. */
7520 queue_comp_unit (per_cu
, pretend_language
);
7525 /* Process the queue. */
7528 process_queue (void)
7530 struct dwarf2_queue_item
*item
, *next_item
;
7532 if (dwarf_read_debug
)
7534 fprintf_unfiltered (gdb_stdlog
,
7535 "Expanding one or more symtabs of objfile %s ...\n",
7536 objfile_name (dwarf2_per_objfile
->objfile
));
7539 /* The queue starts out with one item, but following a DIE reference
7540 may load a new CU, adding it to the end of the queue. */
7541 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
7543 if ((dwarf2_per_objfile
->using_index
7544 ? !item
->per_cu
->v
.quick
->compunit_symtab
7545 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
7546 /* Skip dummy CUs. */
7547 && item
->per_cu
->cu
!= NULL
)
7549 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
7550 unsigned int debug_print_threshold
;
7553 if (per_cu
->is_debug_types
)
7555 struct signatured_type
*sig_type
=
7556 (struct signatured_type
*) per_cu
;
7558 sprintf (buf
, "TU %s at offset 0x%x",
7559 hex_string (sig_type
->signature
),
7560 per_cu
->offset
.sect_off
);
7561 /* There can be 100s of TUs.
7562 Only print them in verbose mode. */
7563 debug_print_threshold
= 2;
7567 sprintf (buf
, "CU at offset 0x%x", per_cu
->offset
.sect_off
);
7568 debug_print_threshold
= 1;
7571 if (dwarf_read_debug
>= debug_print_threshold
)
7572 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
7574 if (per_cu
->is_debug_types
)
7575 process_full_type_unit (per_cu
, item
->pretend_language
);
7577 process_full_comp_unit (per_cu
, item
->pretend_language
);
7579 if (dwarf_read_debug
>= debug_print_threshold
)
7580 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
7583 item
->per_cu
->queued
= 0;
7584 next_item
= item
->next
;
7588 dwarf2_queue_tail
= NULL
;
7590 if (dwarf_read_debug
)
7592 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
7593 objfile_name (dwarf2_per_objfile
->objfile
));
7597 /* Free all allocated queue entries. This function only releases anything if
7598 an error was thrown; if the queue was processed then it would have been
7599 freed as we went along. */
7602 dwarf2_release_queue (void *dummy
)
7604 struct dwarf2_queue_item
*item
, *last
;
7606 item
= dwarf2_queue
;
7609 /* Anything still marked queued is likely to be in an
7610 inconsistent state, so discard it. */
7611 if (item
->per_cu
->queued
)
7613 if (item
->per_cu
->cu
!= NULL
)
7614 free_one_cached_comp_unit (item
->per_cu
);
7615 item
->per_cu
->queued
= 0;
7623 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
7626 /* Read in full symbols for PST, and anything it depends on. */
7629 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
7631 struct dwarf2_per_cu_data
*per_cu
;
7637 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
7638 if (!pst
->dependencies
[i
]->readin
7639 && pst
->dependencies
[i
]->user
== NULL
)
7641 /* Inform about additional files that need to be read in. */
7644 /* FIXME: i18n: Need to make this a single string. */
7645 fputs_filtered (" ", gdb_stdout
);
7647 fputs_filtered ("and ", gdb_stdout
);
7649 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
7650 wrap_here (""); /* Flush output. */
7651 gdb_flush (gdb_stdout
);
7653 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
7656 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
7660 /* It's an include file, no symbols to read for it.
7661 Everything is in the parent symtab. */
7666 dw2_do_instantiate_symtab (per_cu
);
7669 /* Trivial hash function for die_info: the hash value of a DIE
7670 is its offset in .debug_info for this objfile. */
7673 die_hash (const void *item
)
7675 const struct die_info
*die
= (const struct die_info
*) item
;
7677 return die
->offset
.sect_off
;
7680 /* Trivial comparison function for die_info structures: two DIEs
7681 are equal if they have the same offset. */
7684 die_eq (const void *item_lhs
, const void *item_rhs
)
7686 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
7687 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
7689 return die_lhs
->offset
.sect_off
== die_rhs
->offset
.sect_off
;
7692 /* die_reader_func for load_full_comp_unit.
7693 This is identical to read_signatured_type_reader,
7694 but is kept separate for now. */
7697 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
7698 const gdb_byte
*info_ptr
,
7699 struct die_info
*comp_unit_die
,
7703 struct dwarf2_cu
*cu
= reader
->cu
;
7704 enum language
*language_ptr
= (enum language
*) data
;
7706 gdb_assert (cu
->die_hash
== NULL
);
7708 htab_create_alloc_ex (cu
->header
.length
/ 12,
7712 &cu
->comp_unit_obstack
,
7713 hashtab_obstack_allocate
,
7714 dummy_obstack_deallocate
);
7717 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
7718 &info_ptr
, comp_unit_die
);
7719 cu
->dies
= comp_unit_die
;
7720 /* comp_unit_die is not stored in die_hash, no need. */
7722 /* We try not to read any attributes in this function, because not
7723 all CUs needed for references have been loaded yet, and symbol
7724 table processing isn't initialized. But we have to set the CU language,
7725 or we won't be able to build types correctly.
7726 Similarly, if we do not read the producer, we can not apply
7727 producer-specific interpretation. */
7728 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
7731 /* Load the DIEs associated with PER_CU into memory. */
7734 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
7735 enum language pretend_language
)
7737 gdb_assert (! this_cu
->is_debug_types
);
7739 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
7740 load_full_comp_unit_reader
, &pretend_language
);
7743 /* Add a DIE to the delayed physname list. */
7746 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
7747 const char *name
, struct die_info
*die
,
7748 struct dwarf2_cu
*cu
)
7750 struct delayed_method_info mi
;
7752 mi
.fnfield_index
= fnfield_index
;
7756 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
7759 /* A cleanup for freeing the delayed method list. */
7762 free_delayed_list (void *ptr
)
7764 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
7765 if (cu
->method_list
!= NULL
)
7767 VEC_free (delayed_method_info
, cu
->method_list
);
7768 cu
->method_list
= NULL
;
7772 /* Compute the physnames of any methods on the CU's method list.
7774 The computation of method physnames is delayed in order to avoid the
7775 (bad) condition that one of the method's formal parameters is of an as yet
7779 compute_delayed_physnames (struct dwarf2_cu
*cu
)
7782 struct delayed_method_info
*mi
;
7783 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
7785 const char *physname
;
7786 struct fn_fieldlist
*fn_flp
7787 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
7788 physname
= dwarf2_physname (mi
->name
, mi
->die
, cu
);
7789 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
->index
)
7790 = physname
? physname
: "";
7794 /* Go objects should be embedded in a DW_TAG_module DIE,
7795 and it's not clear if/how imported objects will appear.
7796 To keep Go support simple until that's worked out,
7797 go back through what we've read and create something usable.
7798 We could do this while processing each DIE, and feels kinda cleaner,
7799 but that way is more invasive.
7800 This is to, for example, allow the user to type "p var" or "b main"
7801 without having to specify the package name, and allow lookups
7802 of module.object to work in contexts that use the expression
7806 fixup_go_packaging (struct dwarf2_cu
*cu
)
7808 char *package_name
= NULL
;
7809 struct pending
*list
;
7812 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
7814 for (i
= 0; i
< list
->nsyms
; ++i
)
7816 struct symbol
*sym
= list
->symbol
[i
];
7818 if (SYMBOL_LANGUAGE (sym
) == language_go
7819 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
7821 char *this_package_name
= go_symbol_package_name (sym
);
7823 if (this_package_name
== NULL
)
7825 if (package_name
== NULL
)
7826 package_name
= this_package_name
;
7829 if (strcmp (package_name
, this_package_name
) != 0)
7830 complaint (&symfile_complaints
,
7831 _("Symtab %s has objects from two different Go packages: %s and %s"),
7832 (symbol_symtab (sym
) != NULL
7833 ? symtab_to_filename_for_display
7834 (symbol_symtab (sym
))
7835 : objfile_name (cu
->objfile
)),
7836 this_package_name
, package_name
);
7837 xfree (this_package_name
);
7843 if (package_name
!= NULL
)
7845 struct objfile
*objfile
= cu
->objfile
;
7846 const char *saved_package_name
7847 = (const char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
7849 strlen (package_name
));
7850 struct type
*type
= init_type (TYPE_CODE_MODULE
, 0, 0,
7851 saved_package_name
, objfile
);
7854 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
7856 sym
= allocate_symbol (objfile
);
7857 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
7858 SYMBOL_SET_NAMES (sym
, saved_package_name
,
7859 strlen (saved_package_name
), 0, objfile
);
7860 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
7861 e.g., "main" finds the "main" module and not C's main(). */
7862 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
7863 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
7864 SYMBOL_TYPE (sym
) = type
;
7866 add_symbol_to_list (sym
, &global_symbols
);
7868 xfree (package_name
);
7872 /* Return the symtab for PER_CU. This works properly regardless of
7873 whether we're using the index or psymtabs. */
7875 static struct compunit_symtab
*
7876 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
7878 return (dwarf2_per_objfile
->using_index
7879 ? per_cu
->v
.quick
->compunit_symtab
7880 : per_cu
->v
.psymtab
->compunit_symtab
);
7883 /* A helper function for computing the list of all symbol tables
7884 included by PER_CU. */
7887 recursively_compute_inclusions (VEC (compunit_symtab_ptr
) **result
,
7888 htab_t all_children
, htab_t all_type_symtabs
,
7889 struct dwarf2_per_cu_data
*per_cu
,
7890 struct compunit_symtab
*immediate_parent
)
7894 struct compunit_symtab
*cust
;
7895 struct dwarf2_per_cu_data
*iter
;
7897 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
7900 /* This inclusion and its children have been processed. */
7905 /* Only add a CU if it has a symbol table. */
7906 cust
= get_compunit_symtab (per_cu
);
7909 /* If this is a type unit only add its symbol table if we haven't
7910 seen it yet (type unit per_cu's can share symtabs). */
7911 if (per_cu
->is_debug_types
)
7913 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
7917 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
7918 if (cust
->user
== NULL
)
7919 cust
->user
= immediate_parent
;
7924 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
7925 if (cust
->user
== NULL
)
7926 cust
->user
= immediate_parent
;
7931 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
7934 recursively_compute_inclusions (result
, all_children
,
7935 all_type_symtabs
, iter
, cust
);
7939 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
7943 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
7945 gdb_assert (! per_cu
->is_debug_types
);
7947 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
7950 struct dwarf2_per_cu_data
*per_cu_iter
;
7951 struct compunit_symtab
*compunit_symtab_iter
;
7952 VEC (compunit_symtab_ptr
) *result_symtabs
= NULL
;
7953 htab_t all_children
, all_type_symtabs
;
7954 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
7956 /* If we don't have a symtab, we can just skip this case. */
7960 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
7961 NULL
, xcalloc
, xfree
);
7962 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
7963 NULL
, xcalloc
, xfree
);
7966 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
7970 recursively_compute_inclusions (&result_symtabs
, all_children
,
7971 all_type_symtabs
, per_cu_iter
,
7975 /* Now we have a transitive closure of all the included symtabs. */
7976 len
= VEC_length (compunit_symtab_ptr
, result_symtabs
);
7978 = XOBNEWVEC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
7979 struct compunit_symtab
*, len
+ 1);
7981 VEC_iterate (compunit_symtab_ptr
, result_symtabs
, ix
,
7982 compunit_symtab_iter
);
7984 cust
->includes
[ix
] = compunit_symtab_iter
;
7985 cust
->includes
[len
] = NULL
;
7987 VEC_free (compunit_symtab_ptr
, result_symtabs
);
7988 htab_delete (all_children
);
7989 htab_delete (all_type_symtabs
);
7993 /* Compute the 'includes' field for the symtabs of all the CUs we just
7997 process_cu_includes (void)
8000 struct dwarf2_per_cu_data
*iter
;
8003 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
8007 if (! iter
->is_debug_types
)
8008 compute_compunit_symtab_includes (iter
);
8011 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
8014 /* Generate full symbol information for PER_CU, whose DIEs have
8015 already been loaded into memory. */
8018 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
8019 enum language pretend_language
)
8021 struct dwarf2_cu
*cu
= per_cu
->cu
;
8022 struct objfile
*objfile
= per_cu
->objfile
;
8023 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8024 CORE_ADDR lowpc
, highpc
;
8025 struct compunit_symtab
*cust
;
8026 struct cleanup
*back_to
, *delayed_list_cleanup
;
8028 struct block
*static_block
;
8031 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8034 back_to
= make_cleanup (really_free_pendings
, NULL
);
8035 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
8037 cu
->list_in_scope
= &file_symbols
;
8039 cu
->language
= pretend_language
;
8040 cu
->language_defn
= language_def (cu
->language
);
8042 /* Do line number decoding in read_file_scope () */
8043 process_die (cu
->dies
, cu
);
8045 /* For now fudge the Go package. */
8046 if (cu
->language
== language_go
)
8047 fixup_go_packaging (cu
);
8049 /* Now that we have processed all the DIEs in the CU, all the types
8050 should be complete, and it should now be safe to compute all of the
8052 compute_delayed_physnames (cu
);
8053 do_cleanups (delayed_list_cleanup
);
8055 /* Some compilers don't define a DW_AT_high_pc attribute for the
8056 compilation unit. If the DW_AT_high_pc is missing, synthesize
8057 it, by scanning the DIE's below the compilation unit. */
8058 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
8060 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
8061 static_block
= end_symtab_get_static_block (addr
, 0, 1);
8063 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
8064 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
8065 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
8066 addrmap to help ensure it has an accurate map of pc values belonging to
8068 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
8070 cust
= end_symtab_from_static_block (static_block
,
8071 SECT_OFF_TEXT (objfile
), 0);
8075 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
8077 /* Set symtab language to language from DW_AT_language. If the
8078 compilation is from a C file generated by language preprocessors, do
8079 not set the language if it was already deduced by start_subfile. */
8080 if (!(cu
->language
== language_c
8081 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
8082 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8084 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
8085 produce DW_AT_location with location lists but it can be possibly
8086 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
8087 there were bugs in prologue debug info, fixed later in GCC-4.5
8088 by "unwind info for epilogues" patch (which is not directly related).
8090 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
8091 needed, it would be wrong due to missing DW_AT_producer there.
8093 Still one can confuse GDB by using non-standard GCC compilation
8094 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
8096 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
8097 cust
->locations_valid
= 1;
8099 if (gcc_4_minor
>= 5)
8100 cust
->epilogue_unwind_valid
= 1;
8102 cust
->call_site_htab
= cu
->call_site_htab
;
8105 if (dwarf2_per_objfile
->using_index
)
8106 per_cu
->v
.quick
->compunit_symtab
= cust
;
8109 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8110 pst
->compunit_symtab
= cust
;
8114 /* Push it for inclusion processing later. */
8115 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
8117 do_cleanups (back_to
);
8120 /* Generate full symbol information for type unit PER_CU, whose DIEs have
8121 already been loaded into memory. */
8124 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
8125 enum language pretend_language
)
8127 struct dwarf2_cu
*cu
= per_cu
->cu
;
8128 struct objfile
*objfile
= per_cu
->objfile
;
8129 struct compunit_symtab
*cust
;
8130 struct cleanup
*back_to
, *delayed_list_cleanup
;
8131 struct signatured_type
*sig_type
;
8133 gdb_assert (per_cu
->is_debug_types
);
8134 sig_type
= (struct signatured_type
*) per_cu
;
8137 back_to
= make_cleanup (really_free_pendings
, NULL
);
8138 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
8140 cu
->list_in_scope
= &file_symbols
;
8142 cu
->language
= pretend_language
;
8143 cu
->language_defn
= language_def (cu
->language
);
8145 /* The symbol tables are set up in read_type_unit_scope. */
8146 process_die (cu
->dies
, cu
);
8148 /* For now fudge the Go package. */
8149 if (cu
->language
== language_go
)
8150 fixup_go_packaging (cu
);
8152 /* Now that we have processed all the DIEs in the CU, all the types
8153 should be complete, and it should now be safe to compute all of the
8155 compute_delayed_physnames (cu
);
8156 do_cleanups (delayed_list_cleanup
);
8158 /* TUs share symbol tables.
8159 If this is the first TU to use this symtab, complete the construction
8160 of it with end_expandable_symtab. Otherwise, complete the addition of
8161 this TU's symbols to the existing symtab. */
8162 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
8164 cust
= end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
8165 sig_type
->type_unit_group
->compunit_symtab
= cust
;
8169 /* Set symtab language to language from DW_AT_language. If the
8170 compilation is from a C file generated by language preprocessors,
8171 do not set the language if it was already deduced by
8173 if (!(cu
->language
== language_c
8174 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
8175 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8180 augment_type_symtab ();
8181 cust
= sig_type
->type_unit_group
->compunit_symtab
;
8184 if (dwarf2_per_objfile
->using_index
)
8185 per_cu
->v
.quick
->compunit_symtab
= cust
;
8188 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8189 pst
->compunit_symtab
= cust
;
8193 do_cleanups (back_to
);
8196 /* Process an imported unit DIE. */
8199 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8201 struct attribute
*attr
;
8203 /* For now we don't handle imported units in type units. */
8204 if (cu
->per_cu
->is_debug_types
)
8206 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8207 " supported in type units [in module %s]"),
8208 objfile_name (cu
->objfile
));
8211 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8214 struct dwarf2_per_cu_data
*per_cu
;
8215 struct symtab
*imported_symtab
;
8219 offset
= dwarf2_get_ref_die_offset (attr
);
8220 is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
8221 per_cu
= dwarf2_find_containing_comp_unit (offset
, is_dwz
, cu
->objfile
);
8223 /* If necessary, add it to the queue and load its DIEs. */
8224 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
8225 load_full_comp_unit (per_cu
, cu
->language
);
8227 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
8232 /* Reset the in_process bit of a die. */
8235 reset_die_in_process (void *arg
)
8237 struct die_info
*die
= (struct die_info
*) arg
;
8239 die
->in_process
= 0;
8242 /* Process a die and its children. */
8245 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8247 struct cleanup
*in_process
;
8249 /* We should only be processing those not already in process. */
8250 gdb_assert (!die
->in_process
);
8252 die
->in_process
= 1;
8253 in_process
= make_cleanup (reset_die_in_process
,die
);
8257 case DW_TAG_padding
:
8259 case DW_TAG_compile_unit
:
8260 case DW_TAG_partial_unit
:
8261 read_file_scope (die
, cu
);
8263 case DW_TAG_type_unit
:
8264 read_type_unit_scope (die
, cu
);
8266 case DW_TAG_subprogram
:
8267 case DW_TAG_inlined_subroutine
:
8268 read_func_scope (die
, cu
);
8270 case DW_TAG_lexical_block
:
8271 case DW_TAG_try_block
:
8272 case DW_TAG_catch_block
:
8273 read_lexical_block_scope (die
, cu
);
8275 case DW_TAG_GNU_call_site
:
8276 read_call_site_scope (die
, cu
);
8278 case DW_TAG_class_type
:
8279 case DW_TAG_interface_type
:
8280 case DW_TAG_structure_type
:
8281 case DW_TAG_union_type
:
8282 process_structure_scope (die
, cu
);
8284 case DW_TAG_enumeration_type
:
8285 process_enumeration_scope (die
, cu
);
8288 /* These dies have a type, but processing them does not create
8289 a symbol or recurse to process the children. Therefore we can
8290 read them on-demand through read_type_die. */
8291 case DW_TAG_subroutine_type
:
8292 case DW_TAG_set_type
:
8293 case DW_TAG_array_type
:
8294 case DW_TAG_pointer_type
:
8295 case DW_TAG_ptr_to_member_type
:
8296 case DW_TAG_reference_type
:
8297 case DW_TAG_string_type
:
8300 case DW_TAG_base_type
:
8301 case DW_TAG_subrange_type
:
8302 case DW_TAG_typedef
:
8303 /* Add a typedef symbol for the type definition, if it has a
8305 new_symbol (die
, read_type_die (die
, cu
), cu
);
8307 case DW_TAG_common_block
:
8308 read_common_block (die
, cu
);
8310 case DW_TAG_common_inclusion
:
8312 case DW_TAG_namespace
:
8313 cu
->processing_has_namespace_info
= 1;
8314 read_namespace (die
, cu
);
8317 cu
->processing_has_namespace_info
= 1;
8318 read_module (die
, cu
);
8320 case DW_TAG_imported_declaration
:
8321 cu
->processing_has_namespace_info
= 1;
8322 if (read_namespace_alias (die
, cu
))
8324 /* The declaration is not a global namespace alias: fall through. */
8325 case DW_TAG_imported_module
:
8326 cu
->processing_has_namespace_info
= 1;
8327 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
8328 || cu
->language
!= language_fortran
))
8329 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
8330 dwarf_tag_name (die
->tag
));
8331 read_import_statement (die
, cu
);
8334 case DW_TAG_imported_unit
:
8335 process_imported_unit_die (die
, cu
);
8339 new_symbol (die
, NULL
, cu
);
8343 do_cleanups (in_process
);
8346 /* DWARF name computation. */
8348 /* A helper function for dwarf2_compute_name which determines whether DIE
8349 needs to have the name of the scope prepended to the name listed in the
8353 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
8355 struct attribute
*attr
;
8359 case DW_TAG_namespace
:
8360 case DW_TAG_typedef
:
8361 case DW_TAG_class_type
:
8362 case DW_TAG_interface_type
:
8363 case DW_TAG_structure_type
:
8364 case DW_TAG_union_type
:
8365 case DW_TAG_enumeration_type
:
8366 case DW_TAG_enumerator
:
8367 case DW_TAG_subprogram
:
8368 case DW_TAG_inlined_subroutine
:
8370 case DW_TAG_imported_declaration
:
8373 case DW_TAG_variable
:
8374 case DW_TAG_constant
:
8375 /* We only need to prefix "globally" visible variables. These include
8376 any variable marked with DW_AT_external or any variable that
8377 lives in a namespace. [Variables in anonymous namespaces
8378 require prefixing, but they are not DW_AT_external.] */
8380 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
8382 struct dwarf2_cu
*spec_cu
= cu
;
8384 return die_needs_namespace (die_specification (die
, &spec_cu
),
8388 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
8389 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
8390 && die
->parent
->tag
!= DW_TAG_module
)
8392 /* A variable in a lexical block of some kind does not need a
8393 namespace, even though in C++ such variables may be external
8394 and have a mangled name. */
8395 if (die
->parent
->tag
== DW_TAG_lexical_block
8396 || die
->parent
->tag
== DW_TAG_try_block
8397 || die
->parent
->tag
== DW_TAG_catch_block
8398 || die
->parent
->tag
== DW_TAG_subprogram
)
8407 /* Retrieve the last character from a mem_file. */
8410 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
8412 char *last_char_p
= (char *) object
;
8415 *last_char_p
= buffer
[length
- 1];
8418 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
8419 compute the physname for the object, which include a method's:
8420 - formal parameters (C++/Java),
8421 - receiver type (Go),
8422 - return type (Java).
8424 The term "physname" is a bit confusing.
8425 For C++, for example, it is the demangled name.
8426 For Go, for example, it's the mangled name.
8428 For Ada, return the DIE's linkage name rather than the fully qualified
8429 name. PHYSNAME is ignored..
8431 The result is allocated on the objfile_obstack and canonicalized. */
8434 dwarf2_compute_name (const char *name
,
8435 struct die_info
*die
, struct dwarf2_cu
*cu
,
8438 struct objfile
*objfile
= cu
->objfile
;
8441 name
= dwarf2_name (die
, cu
);
8443 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
8444 but otherwise compute it by typename_concat inside GDB.
8445 FIXME: Actually this is not really true, or at least not always true.
8446 It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle
8447 Fortran names because there is no mangling standard. So new_symbol_full
8448 will set the demangled name to the result of dwarf2_full_name, and it is
8449 the demangled name that GDB uses if it exists. */
8450 if (cu
->language
== language_ada
8451 || (cu
->language
== language_fortran
&& physname
))
8453 /* For Ada unit, we prefer the linkage name over the name, as
8454 the former contains the exported name, which the user expects
8455 to be able to reference. Ideally, we want the user to be able
8456 to reference this entity using either natural or linkage name,
8457 but we haven't started looking at this enhancement yet. */
8458 const char *linkage_name
;
8460 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
8461 if (linkage_name
== NULL
)
8462 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8463 if (linkage_name
!= NULL
)
8464 return linkage_name
;
8467 /* These are the only languages we know how to qualify names in. */
8469 && (cu
->language
== language_cplus
|| cu
->language
== language_java
8470 || cu
->language
== language_fortran
|| cu
->language
== language_d
))
8472 if (die_needs_namespace (die
, cu
))
8476 struct ui_file
*buf
;
8477 char *intermediate_name
;
8478 const char *canonical_name
= NULL
;
8480 prefix
= determine_prefix (die
, cu
);
8481 buf
= mem_fileopen ();
8482 if (*prefix
!= '\0')
8484 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
8487 fputs_unfiltered (prefixed_name
, buf
);
8488 xfree (prefixed_name
);
8491 fputs_unfiltered (name
, buf
);
8493 /* Template parameters may be specified in the DIE's DW_AT_name, or
8494 as children with DW_TAG_template_type_param or
8495 DW_TAG_value_type_param. If the latter, add them to the name
8496 here. If the name already has template parameters, then
8497 skip this step; some versions of GCC emit both, and
8498 it is more efficient to use the pre-computed name.
8500 Something to keep in mind about this process: it is very
8501 unlikely, or in some cases downright impossible, to produce
8502 something that will match the mangled name of a function.
8503 If the definition of the function has the same debug info,
8504 we should be able to match up with it anyway. But fallbacks
8505 using the minimal symbol, for instance to find a method
8506 implemented in a stripped copy of libstdc++, will not work.
8507 If we do not have debug info for the definition, we will have to
8508 match them up some other way.
8510 When we do name matching there is a related problem with function
8511 templates; two instantiated function templates are allowed to
8512 differ only by their return types, which we do not add here. */
8514 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
8516 struct attribute
*attr
;
8517 struct die_info
*child
;
8520 die
->building_fullname
= 1;
8522 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
8526 const gdb_byte
*bytes
;
8527 struct dwarf2_locexpr_baton
*baton
;
8530 if (child
->tag
!= DW_TAG_template_type_param
8531 && child
->tag
!= DW_TAG_template_value_param
)
8536 fputs_unfiltered ("<", buf
);
8540 fputs_unfiltered (", ", buf
);
8542 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
8545 complaint (&symfile_complaints
,
8546 _("template parameter missing DW_AT_type"));
8547 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
8550 type
= die_type (child
, cu
);
8552 if (child
->tag
== DW_TAG_template_type_param
)
8554 c_print_type (type
, "", buf
, -1, 0, &type_print_raw_options
);
8558 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
8561 complaint (&symfile_complaints
,
8562 _("template parameter missing "
8563 "DW_AT_const_value"));
8564 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
8568 dwarf2_const_value_attr (attr
, type
, name
,
8569 &cu
->comp_unit_obstack
, cu
,
8570 &value
, &bytes
, &baton
);
8572 if (TYPE_NOSIGN (type
))
8573 /* GDB prints characters as NUMBER 'CHAR'. If that's
8574 changed, this can use value_print instead. */
8575 c_printchar (value
, type
, buf
);
8578 struct value_print_options opts
;
8581 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
8585 else if (bytes
!= NULL
)
8587 v
= allocate_value (type
);
8588 memcpy (value_contents_writeable (v
), bytes
,
8589 TYPE_LENGTH (type
));
8592 v
= value_from_longest (type
, value
);
8594 /* Specify decimal so that we do not depend on
8596 get_formatted_print_options (&opts
, 'd');
8598 value_print (v
, buf
, &opts
);
8604 die
->building_fullname
= 0;
8608 /* Close the argument list, with a space if necessary
8609 (nested templates). */
8610 char last_char
= '\0';
8611 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
8612 if (last_char
== '>')
8613 fputs_unfiltered (" >", buf
);
8615 fputs_unfiltered (">", buf
);
8619 /* For Java and C++ methods, append formal parameter type
8620 information, if PHYSNAME. */
8622 if (physname
&& die
->tag
== DW_TAG_subprogram
8623 && (cu
->language
== language_cplus
8624 || cu
->language
== language_java
))
8626 struct type
*type
= read_type_die (die
, cu
);
8628 c_type_print_args (type
, buf
, 1, cu
->language
,
8629 &type_print_raw_options
);
8631 if (cu
->language
== language_java
)
8633 /* For java, we must append the return type to method
8635 if (die
->tag
== DW_TAG_subprogram
)
8636 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
8637 0, 0, &type_print_raw_options
);
8639 else if (cu
->language
== language_cplus
)
8641 /* Assume that an artificial first parameter is
8642 "this", but do not crash if it is not. RealView
8643 marks unnamed (and thus unused) parameters as
8644 artificial; there is no way to differentiate
8646 if (TYPE_NFIELDS (type
) > 0
8647 && TYPE_FIELD_ARTIFICIAL (type
, 0)
8648 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
8649 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
8651 fputs_unfiltered (" const", buf
);
8655 intermediate_name
= ui_file_xstrdup (buf
, &length
);
8656 ui_file_delete (buf
);
8658 if (cu
->language
== language_cplus
)
8660 = dwarf2_canonicalize_name (intermediate_name
, cu
,
8661 &objfile
->per_bfd
->storage_obstack
);
8663 /* If we only computed INTERMEDIATE_NAME, or if
8664 INTERMEDIATE_NAME is already canonical, then we need to
8665 copy it to the appropriate obstack. */
8666 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
)
8667 name
= ((const char *)
8668 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8670 strlen (intermediate_name
)));
8672 name
= canonical_name
;
8674 xfree (intermediate_name
);
8681 /* Return the fully qualified name of DIE, based on its DW_AT_name.
8682 If scope qualifiers are appropriate they will be added. The result
8683 will be allocated on the storage_obstack, or NULL if the DIE does
8684 not have a name. NAME may either be from a previous call to
8685 dwarf2_name or NULL.
8687 The output string will be canonicalized (if C++/Java). */
8690 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
8692 return dwarf2_compute_name (name
, die
, cu
, 0);
8695 /* Construct a physname for the given DIE in CU. NAME may either be
8696 from a previous call to dwarf2_name or NULL. The result will be
8697 allocated on the objfile_objstack or NULL if the DIE does not have a
8700 The output string will be canonicalized (if C++/Java). */
8703 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
8705 struct objfile
*objfile
= cu
->objfile
;
8706 struct attribute
*attr
;
8707 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
8708 struct cleanup
*back_to
;
8711 /* In this case dwarf2_compute_name is just a shortcut not building anything
8713 if (!die_needs_namespace (die
, cu
))
8714 return dwarf2_compute_name (name
, die
, cu
, 1);
8716 back_to
= make_cleanup (null_cleanup
, NULL
);
8718 mangled
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
8719 if (mangled
== NULL
)
8720 mangled
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8722 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
8724 if (mangled
!= NULL
)
8728 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
8729 type. It is easier for GDB users to search for such functions as
8730 `name(params)' than `long name(params)'. In such case the minimal
8731 symbol names do not match the full symbol names but for template
8732 functions there is never a need to look up their definition from their
8733 declaration so the only disadvantage remains the minimal symbol
8734 variant `long name(params)' does not have the proper inferior type.
8737 if (cu
->language
== language_go
)
8739 /* This is a lie, but we already lie to the caller new_symbol_full.
8740 new_symbol_full assumes we return the mangled name.
8741 This just undoes that lie until things are cleaned up. */
8746 demangled
= gdb_demangle (mangled
,
8747 (DMGL_PARAMS
| DMGL_ANSI
8748 | (cu
->language
== language_java
8749 ? DMGL_JAVA
| DMGL_RET_POSTFIX
8754 make_cleanup (xfree
, demangled
);
8764 if (canon
== NULL
|| check_physname
)
8766 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
8768 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
8770 /* It may not mean a bug in GDB. The compiler could also
8771 compute DW_AT_linkage_name incorrectly. But in such case
8772 GDB would need to be bug-to-bug compatible. */
8774 complaint (&symfile_complaints
,
8775 _("Computed physname <%s> does not match demangled <%s> "
8776 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
8777 physname
, canon
, mangled
, die
->offset
.sect_off
,
8778 objfile_name (objfile
));
8780 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
8781 is available here - over computed PHYSNAME. It is safer
8782 against both buggy GDB and buggy compilers. */
8796 retval
= ((const char *)
8797 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8798 retval
, strlen (retval
)));
8800 do_cleanups (back_to
);
8804 /* Inspect DIE in CU for a namespace alias. If one exists, record
8805 a new symbol for it.
8807 Returns 1 if a namespace alias was recorded, 0 otherwise. */
8810 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
8812 struct attribute
*attr
;
8814 /* If the die does not have a name, this is not a namespace
8816 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
8820 struct die_info
*d
= die
;
8821 struct dwarf2_cu
*imported_cu
= cu
;
8823 /* If the compiler has nested DW_AT_imported_declaration DIEs,
8824 keep inspecting DIEs until we hit the underlying import. */
8825 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
8826 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
8828 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
8832 d
= follow_die_ref (d
, attr
, &imported_cu
);
8833 if (d
->tag
!= DW_TAG_imported_declaration
)
8837 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
8839 complaint (&symfile_complaints
,
8840 _("DIE at 0x%x has too many recursively imported "
8841 "declarations"), d
->offset
.sect_off
);
8848 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
8850 type
= get_die_type_at_offset (offset
, cu
->per_cu
);
8851 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
8853 /* This declaration is a global namespace alias. Add
8854 a symbol for it whose type is the aliased namespace. */
8855 new_symbol (die
, type
, cu
);
8864 /* Return the using directives repository (global or local?) to use in the
8865 current context for LANGUAGE.
8867 For Ada, imported declarations can materialize renamings, which *may* be
8868 global. However it is impossible (for now?) in DWARF to distinguish
8869 "external" imported declarations and "static" ones. As all imported
8870 declarations seem to be static in all other languages, make them all CU-wide
8871 global only in Ada. */
8873 static struct using_direct
**
8874 using_directives (enum language language
)
8876 if (language
== language_ada
&& context_stack_depth
== 0)
8877 return &global_using_directives
;
8879 return &local_using_directives
;
8882 /* Read the import statement specified by the given die and record it. */
8885 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
8887 struct objfile
*objfile
= cu
->objfile
;
8888 struct attribute
*import_attr
;
8889 struct die_info
*imported_die
, *child_die
;
8890 struct dwarf2_cu
*imported_cu
;
8891 const char *imported_name
;
8892 const char *imported_name_prefix
;
8893 const char *canonical_name
;
8894 const char *import_alias
;
8895 const char *imported_declaration
= NULL
;
8896 const char *import_prefix
;
8897 VEC (const_char_ptr
) *excludes
= NULL
;
8898 struct cleanup
*cleanups
;
8900 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8901 if (import_attr
== NULL
)
8903 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
8904 dwarf_tag_name (die
->tag
));
8909 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
8910 imported_name
= dwarf2_name (imported_die
, imported_cu
);
8911 if (imported_name
== NULL
)
8913 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
8915 The import in the following code:
8929 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
8930 <52> DW_AT_decl_file : 1
8931 <53> DW_AT_decl_line : 6
8932 <54> DW_AT_import : <0x75>
8933 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
8935 <5b> DW_AT_decl_file : 1
8936 <5c> DW_AT_decl_line : 2
8937 <5d> DW_AT_type : <0x6e>
8939 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
8940 <76> DW_AT_byte_size : 4
8941 <77> DW_AT_encoding : 5 (signed)
8943 imports the wrong die ( 0x75 instead of 0x58 ).
8944 This case will be ignored until the gcc bug is fixed. */
8948 /* Figure out the local name after import. */
8949 import_alias
= dwarf2_name (die
, cu
);
8951 /* Figure out where the statement is being imported to. */
8952 import_prefix
= determine_prefix (die
, cu
);
8954 /* Figure out what the scope of the imported die is and prepend it
8955 to the name of the imported die. */
8956 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
8958 if (imported_die
->tag
!= DW_TAG_namespace
8959 && imported_die
->tag
!= DW_TAG_module
)
8961 imported_declaration
= imported_name
;
8962 canonical_name
= imported_name_prefix
;
8964 else if (strlen (imported_name_prefix
) > 0)
8965 canonical_name
= obconcat (&objfile
->objfile_obstack
,
8966 imported_name_prefix
,
8967 (cu
->language
== language_d
? "." : "::"),
8968 imported_name
, (char *) NULL
);
8970 canonical_name
= imported_name
;
8972 cleanups
= make_cleanup (VEC_cleanup (const_char_ptr
), &excludes
);
8974 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
8975 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
8976 child_die
= sibling_die (child_die
))
8978 /* DWARF-4: A Fortran use statement with a “rename list” may be
8979 represented by an imported module entry with an import attribute
8980 referring to the module and owned entries corresponding to those
8981 entities that are renamed as part of being imported. */
8983 if (child_die
->tag
!= DW_TAG_imported_declaration
)
8985 complaint (&symfile_complaints
,
8986 _("child DW_TAG_imported_declaration expected "
8987 "- DIE at 0x%x [in module %s]"),
8988 child_die
->offset
.sect_off
, objfile_name (objfile
));
8992 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
8993 if (import_attr
== NULL
)
8995 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
8996 dwarf_tag_name (child_die
->tag
));
9001 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
9003 imported_name
= dwarf2_name (imported_die
, imported_cu
);
9004 if (imported_name
== NULL
)
9006 complaint (&symfile_complaints
,
9007 _("child DW_TAG_imported_declaration has unknown "
9008 "imported name - DIE at 0x%x [in module %s]"),
9009 child_die
->offset
.sect_off
, objfile_name (objfile
));
9013 VEC_safe_push (const_char_ptr
, excludes
, imported_name
);
9015 process_die (child_die
, cu
);
9018 add_using_directive (using_directives (cu
->language
),
9022 imported_declaration
,
9025 &objfile
->objfile_obstack
);
9027 do_cleanups (cleanups
);
9030 /* Cleanup function for handle_DW_AT_stmt_list. */
9033 free_cu_line_header (void *arg
)
9035 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) arg
;
9037 free_line_header (cu
->line_header
);
9038 cu
->line_header
= NULL
;
9041 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
9042 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
9043 this, it was first present in GCC release 4.3.0. */
9046 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
9048 if (!cu
->checked_producer
)
9049 check_producer (cu
);
9051 return cu
->producer_is_gcc_lt_4_3
;
9055 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
9056 const char **name
, const char **comp_dir
)
9058 /* Find the filename. Do not use dwarf2_name here, since the filename
9059 is not a source language identifier. */
9060 *name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
9061 *comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
9063 if (*comp_dir
== NULL
9064 && producer_is_gcc_lt_4_3 (cu
) && *name
!= NULL
9065 && IS_ABSOLUTE_PATH (*name
))
9067 char *d
= ldirname (*name
);
9071 make_cleanup (xfree
, d
);
9073 if (*comp_dir
!= NULL
)
9075 /* Irix 6.2 native cc prepends <machine>.: to the compilation
9076 directory, get rid of it. */
9077 const char *cp
= strchr (*comp_dir
, ':');
9079 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
9084 *name
= "<unknown>";
9087 /* Handle DW_AT_stmt_list for a compilation unit.
9088 DIE is the DW_TAG_compile_unit die for CU.
9089 COMP_DIR is the compilation directory. LOWPC is passed to
9090 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
9093 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
9094 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
9096 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9097 struct attribute
*attr
;
9098 unsigned int line_offset
;
9099 struct line_header line_header_local
;
9100 hashval_t line_header_local_hash
;
9105 gdb_assert (! cu
->per_cu
->is_debug_types
);
9107 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9111 line_offset
= DW_UNSND (attr
);
9113 /* The line header hash table is only created if needed (it exists to
9114 prevent redundant reading of the line table for partial_units).
9115 If we're given a partial_unit, we'll need it. If we're given a
9116 compile_unit, then use the line header hash table if it's already
9117 created, but don't create one just yet. */
9119 if (dwarf2_per_objfile
->line_header_hash
== NULL
9120 && die
->tag
== DW_TAG_partial_unit
)
9122 dwarf2_per_objfile
->line_header_hash
9123 = htab_create_alloc_ex (127, line_header_hash_voidp
,
9124 line_header_eq_voidp
,
9125 free_line_header_voidp
,
9126 &objfile
->objfile_obstack
,
9127 hashtab_obstack_allocate
,
9128 dummy_obstack_deallocate
);
9131 line_header_local
.offset
.sect_off
= line_offset
;
9132 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
9133 line_header_local_hash
= line_header_hash (&line_header_local
);
9134 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
9136 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
9138 line_header_local_hash
, NO_INSERT
);
9140 /* For DW_TAG_compile_unit we need info like symtab::linetable which
9141 is not present in *SLOT (since if there is something in *SLOT then
9142 it will be for a partial_unit). */
9143 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
9145 gdb_assert (*slot
!= NULL
);
9146 cu
->line_header
= (struct line_header
*) *slot
;
9151 /* dwarf_decode_line_header does not yet provide sufficient information.
9152 We always have to call also dwarf_decode_lines for it. */
9153 cu
->line_header
= dwarf_decode_line_header (line_offset
, cu
);
9154 if (cu
->line_header
== NULL
)
9157 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
9161 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
9163 line_header_local_hash
, INSERT
);
9164 gdb_assert (slot
!= NULL
);
9166 if (slot
!= NULL
&& *slot
== NULL
)
9168 /* This newly decoded line number information unit will be owned
9169 by line_header_hash hash table. */
9170 *slot
= cu
->line_header
;
9174 /* We cannot free any current entry in (*slot) as that struct line_header
9175 may be already used by multiple CUs. Create only temporary decoded
9176 line_header for this CU - it may happen at most once for each line
9177 number information unit. And if we're not using line_header_hash
9178 then this is what we want as well. */
9179 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
9180 make_cleanup (free_cu_line_header
, cu
);
9182 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
9183 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
9187 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
9190 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9192 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9193 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9194 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
9195 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
9196 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
9197 struct attribute
*attr
;
9198 const char *name
= NULL
;
9199 const char *comp_dir
= NULL
;
9200 struct die_info
*child_die
;
9201 bfd
*abfd
= objfile
->obfd
;
9204 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9206 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
9208 /* If we didn't find a lowpc, set it to highpc to avoid complaints
9209 from finish_block. */
9210 if (lowpc
== ((CORE_ADDR
) -1))
9212 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
9214 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
9216 prepare_one_comp_unit (cu
, die
, cu
->language
);
9218 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
9219 standardised yet. As a workaround for the language detection we fall
9220 back to the DW_AT_producer string. */
9221 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
9222 cu
->language
= language_opencl
;
9224 /* Similar hack for Go. */
9225 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
9226 set_cu_language (DW_LANG_Go
, cu
);
9228 dwarf2_start_symtab (cu
, name
, comp_dir
, lowpc
);
9230 /* Decode line number information if present. We do this before
9231 processing child DIEs, so that the line header table is available
9232 for DW_AT_decl_file. */
9233 handle_DW_AT_stmt_list (die
, cu
, comp_dir
, lowpc
);
9235 /* Process all dies in compilation unit. */
9236 if (die
->child
!= NULL
)
9238 child_die
= die
->child
;
9239 while (child_die
&& child_die
->tag
)
9241 process_die (child_die
, cu
);
9242 child_die
= sibling_die (child_die
);
9246 /* Decode macro information, if present. Dwarf 2 macro information
9247 refers to information in the line number info statement program
9248 header, so we can only read it if we've read the header
9250 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
9251 if (attr
&& cu
->line_header
)
9253 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
9254 complaint (&symfile_complaints
,
9255 _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
9257 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
9261 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
9262 if (attr
&& cu
->line_header
)
9264 unsigned int macro_offset
= DW_UNSND (attr
);
9266 dwarf_decode_macros (cu
, macro_offset
, 0);
9270 do_cleanups (back_to
);
9273 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
9274 Create the set of symtabs used by this TU, or if this TU is sharing
9275 symtabs with another TU and the symtabs have already been created
9276 then restore those symtabs in the line header.
9277 We don't need the pc/line-number mapping for type units. */
9280 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
9282 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9283 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
9284 struct type_unit_group
*tu_group
;
9286 struct line_header
*lh
;
9287 struct attribute
*attr
;
9288 unsigned int i
, line_offset
;
9289 struct signatured_type
*sig_type
;
9291 gdb_assert (per_cu
->is_debug_types
);
9292 sig_type
= (struct signatured_type
*) per_cu
;
9294 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9296 /* If we're using .gdb_index (includes -readnow) then
9297 per_cu->type_unit_group may not have been set up yet. */
9298 if (sig_type
->type_unit_group
== NULL
)
9299 sig_type
->type_unit_group
= get_type_unit_group (cu
, attr
);
9300 tu_group
= sig_type
->type_unit_group
;
9302 /* If we've already processed this stmt_list there's no real need to
9303 do it again, we could fake it and just recreate the part we need
9304 (file name,index -> symtab mapping). If data shows this optimization
9305 is useful we can do it then. */
9306 first_time
= tu_group
->compunit_symtab
== NULL
;
9308 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
9313 line_offset
= DW_UNSND (attr
);
9314 lh
= dwarf_decode_line_header (line_offset
, cu
);
9319 dwarf2_start_symtab (cu
, "", NULL
, 0);
9322 gdb_assert (tu_group
->symtabs
== NULL
);
9323 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9328 cu
->line_header
= lh
;
9329 make_cleanup (free_cu_line_header
, cu
);
9333 struct compunit_symtab
*cust
= dwarf2_start_symtab (cu
, "", NULL
, 0);
9335 /* Note: We don't assign tu_group->compunit_symtab yet because we're
9336 still initializing it, and our caller (a few levels up)
9337 process_full_type_unit still needs to know if this is the first
9340 tu_group
->num_symtabs
= lh
->num_file_names
;
9341 tu_group
->symtabs
= XNEWVEC (struct symtab
*, lh
->num_file_names
);
9343 for (i
= 0; i
< lh
->num_file_names
; ++i
)
9345 const char *dir
= NULL
;
9346 struct file_entry
*fe
= &lh
->file_names
[i
];
9348 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
9349 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
9350 dwarf2_start_subfile (fe
->name
, dir
);
9352 if (current_subfile
->symtab
== NULL
)
9354 /* NOTE: start_subfile will recognize when it's been passed
9355 a file it has already seen. So we can't assume there's a
9356 simple mapping from lh->file_names to subfiles, plus
9357 lh->file_names may contain dups. */
9358 current_subfile
->symtab
9359 = allocate_symtab (cust
, current_subfile
->name
);
9362 fe
->symtab
= current_subfile
->symtab
;
9363 tu_group
->symtabs
[i
] = fe
->symtab
;
9368 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9370 for (i
= 0; i
< lh
->num_file_names
; ++i
)
9372 struct file_entry
*fe
= &lh
->file_names
[i
];
9374 fe
->symtab
= tu_group
->symtabs
[i
];
9378 /* The main symtab is allocated last. Type units don't have DW_AT_name
9379 so they don't have a "real" (so to speak) symtab anyway.
9380 There is later code that will assign the main symtab to all symbols
9381 that don't have one. We need to handle the case of a symbol with a
9382 missing symtab (DW_AT_decl_file) anyway. */
9385 /* Process DW_TAG_type_unit.
9386 For TUs we want to skip the first top level sibling if it's not the
9387 actual type being defined by this TU. In this case the first top
9388 level sibling is there to provide context only. */
9391 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9393 struct die_info
*child_die
;
9395 prepare_one_comp_unit (cu
, die
, language_minimal
);
9397 /* Initialize (or reinitialize) the machinery for building symtabs.
9398 We do this before processing child DIEs, so that the line header table
9399 is available for DW_AT_decl_file. */
9400 setup_type_unit_groups (die
, cu
);
9402 if (die
->child
!= NULL
)
9404 child_die
= die
->child
;
9405 while (child_die
&& child_die
->tag
)
9407 process_die (child_die
, cu
);
9408 child_die
= sibling_die (child_die
);
9415 http://gcc.gnu.org/wiki/DebugFission
9416 http://gcc.gnu.org/wiki/DebugFissionDWP
9418 To simplify handling of both DWO files ("object" files with the DWARF info)
9419 and DWP files (a file with the DWOs packaged up into one file), we treat
9420 DWP files as having a collection of virtual DWO files. */
9423 hash_dwo_file (const void *item
)
9425 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
9428 hash
= htab_hash_string (dwo_file
->dwo_name
);
9429 if (dwo_file
->comp_dir
!= NULL
)
9430 hash
+= htab_hash_string (dwo_file
->comp_dir
);
9435 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
9437 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
9438 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
9440 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
9442 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
9443 return lhs
->comp_dir
== rhs
->comp_dir
;
9444 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
9447 /* Allocate a hash table for DWO files. */
9450 allocate_dwo_file_hash_table (void)
9452 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9454 return htab_create_alloc_ex (41,
9458 &objfile
->objfile_obstack
,
9459 hashtab_obstack_allocate
,
9460 dummy_obstack_deallocate
);
9463 /* Lookup DWO file DWO_NAME. */
9466 lookup_dwo_file_slot (const char *dwo_name
, const char *comp_dir
)
9468 struct dwo_file find_entry
;
9471 if (dwarf2_per_objfile
->dwo_files
== NULL
)
9472 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
9474 memset (&find_entry
, 0, sizeof (find_entry
));
9475 find_entry
.dwo_name
= dwo_name
;
9476 find_entry
.comp_dir
= comp_dir
;
9477 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
9483 hash_dwo_unit (const void *item
)
9485 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
9487 /* This drops the top 32 bits of the id, but is ok for a hash. */
9488 return dwo_unit
->signature
;
9492 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
9494 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
9495 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
9497 /* The signature is assumed to be unique within the DWO file.
9498 So while object file CU dwo_id's always have the value zero,
9499 that's OK, assuming each object file DWO file has only one CU,
9500 and that's the rule for now. */
9501 return lhs
->signature
== rhs
->signature
;
9504 /* Allocate a hash table for DWO CUs,TUs.
9505 There is one of these tables for each of CUs,TUs for each DWO file. */
9508 allocate_dwo_unit_table (struct objfile
*objfile
)
9510 /* Start out with a pretty small number.
9511 Generally DWO files contain only one CU and maybe some TUs. */
9512 return htab_create_alloc_ex (3,
9516 &objfile
->objfile_obstack
,
9517 hashtab_obstack_allocate
,
9518 dummy_obstack_deallocate
);
9521 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
9523 struct create_dwo_cu_data
9525 struct dwo_file
*dwo_file
;
9526 struct dwo_unit dwo_unit
;
9529 /* die_reader_func for create_dwo_cu. */
9532 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
9533 const gdb_byte
*info_ptr
,
9534 struct die_info
*comp_unit_die
,
9538 struct dwarf2_cu
*cu
= reader
->cu
;
9539 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9540 sect_offset offset
= cu
->per_cu
->offset
;
9541 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
9542 struct create_dwo_cu_data
*data
= (struct create_dwo_cu_data
*) datap
;
9543 struct dwo_file
*dwo_file
= data
->dwo_file
;
9544 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
9545 struct attribute
*attr
;
9547 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
9550 complaint (&symfile_complaints
,
9551 _("Dwarf Error: debug entry at offset 0x%x is missing"
9552 " its dwo_id [in module %s]"),
9553 offset
.sect_off
, dwo_file
->dwo_name
);
9557 dwo_unit
->dwo_file
= dwo_file
;
9558 dwo_unit
->signature
= DW_UNSND (attr
);
9559 dwo_unit
->section
= section
;
9560 dwo_unit
->offset
= offset
;
9561 dwo_unit
->length
= cu
->per_cu
->length
;
9563 if (dwarf_read_debug
)
9564 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, dwo_id %s\n",
9565 offset
.sect_off
, hex_string (dwo_unit
->signature
));
9568 /* Create the dwo_unit for the lone CU in DWO_FILE.
9569 Note: This function processes DWO files only, not DWP files. */
9571 static struct dwo_unit
*
9572 create_dwo_cu (struct dwo_file
*dwo_file
)
9574 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9575 struct dwarf2_section_info
*section
= &dwo_file
->sections
.info
;
9578 const gdb_byte
*info_ptr
, *end_ptr
;
9579 struct create_dwo_cu_data create_dwo_cu_data
;
9580 struct dwo_unit
*dwo_unit
;
9582 dwarf2_read_section (objfile
, section
);
9583 info_ptr
= section
->buffer
;
9585 if (info_ptr
== NULL
)
9588 /* We can't set abfd until now because the section may be empty or
9589 not present, in which case section->asection will be NULL. */
9590 abfd
= get_section_bfd_owner (section
);
9592 if (dwarf_read_debug
)
9594 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
9595 get_section_name (section
),
9596 get_section_file_name (section
));
9599 create_dwo_cu_data
.dwo_file
= dwo_file
;
9602 end_ptr
= info_ptr
+ section
->size
;
9603 while (info_ptr
< end_ptr
)
9605 struct dwarf2_per_cu_data per_cu
;
9607 memset (&create_dwo_cu_data
.dwo_unit
, 0,
9608 sizeof (create_dwo_cu_data
.dwo_unit
));
9609 memset (&per_cu
, 0, sizeof (per_cu
));
9610 per_cu
.objfile
= objfile
;
9611 per_cu
.is_debug_types
= 0;
9612 per_cu
.offset
.sect_off
= info_ptr
- section
->buffer
;
9613 per_cu
.section
= section
;
9615 init_cutu_and_read_dies_no_follow (&per_cu
, dwo_file
,
9616 create_dwo_cu_reader
,
9617 &create_dwo_cu_data
);
9619 if (create_dwo_cu_data
.dwo_unit
.dwo_file
!= NULL
)
9621 /* If we've already found one, complain. We only support one
9622 because having more than one requires hacking the dwo_name of
9623 each to match, which is highly unlikely to happen. */
9624 if (dwo_unit
!= NULL
)
9626 complaint (&symfile_complaints
,
9627 _("Multiple CUs in DWO file %s [in module %s]"),
9628 dwo_file
->dwo_name
, objfile_name (objfile
));
9632 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
9633 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
9636 info_ptr
+= per_cu
.length
;
9642 /* DWP file .debug_{cu,tu}_index section format:
9643 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
9647 Both index sections have the same format, and serve to map a 64-bit
9648 signature to a set of section numbers. Each section begins with a header,
9649 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
9650 indexes, and a pool of 32-bit section numbers. The index sections will be
9651 aligned at 8-byte boundaries in the file.
9653 The index section header consists of:
9655 V, 32 bit version number
9657 N, 32 bit number of compilation units or type units in the index
9658 M, 32 bit number of slots in the hash table
9660 Numbers are recorded using the byte order of the application binary.
9662 The hash table begins at offset 16 in the section, and consists of an array
9663 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
9664 order of the application binary). Unused slots in the hash table are 0.
9665 (We rely on the extreme unlikeliness of a signature being exactly 0.)
9667 The parallel table begins immediately after the hash table
9668 (at offset 16 + 8 * M from the beginning of the section), and consists of an
9669 array of 32-bit indexes (using the byte order of the application binary),
9670 corresponding 1-1 with slots in the hash table. Each entry in the parallel
9671 table contains a 32-bit index into the pool of section numbers. For unused
9672 hash table slots, the corresponding entry in the parallel table will be 0.
9674 The pool of section numbers begins immediately following the hash table
9675 (at offset 16 + 12 * M from the beginning of the section). The pool of
9676 section numbers consists of an array of 32-bit words (using the byte order
9677 of the application binary). Each item in the array is indexed starting
9678 from 0. The hash table entry provides the index of the first section
9679 number in the set. Additional section numbers in the set follow, and the
9680 set is terminated by a 0 entry (section number 0 is not used in ELF).
9682 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
9683 section must be the first entry in the set, and the .debug_abbrev.dwo must
9684 be the second entry. Other members of the set may follow in any order.
9690 DWP Version 2 combines all the .debug_info, etc. sections into one,
9691 and the entries in the index tables are now offsets into these sections.
9692 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
9695 Index Section Contents:
9697 Hash Table of Signatures dwp_hash_table.hash_table
9698 Parallel Table of Indices dwp_hash_table.unit_table
9699 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
9700 Table of Section Sizes dwp_hash_table.v2.sizes
9702 The index section header consists of:
9704 V, 32 bit version number
9705 L, 32 bit number of columns in the table of section offsets
9706 N, 32 bit number of compilation units or type units in the index
9707 M, 32 bit number of slots in the hash table
9709 Numbers are recorded using the byte order of the application binary.
9711 The hash table has the same format as version 1.
9712 The parallel table of indices has the same format as version 1,
9713 except that the entries are origin-1 indices into the table of sections
9714 offsets and the table of section sizes.
9716 The table of offsets begins immediately following the parallel table
9717 (at offset 16 + 12 * M from the beginning of the section). The table is
9718 a two-dimensional array of 32-bit words (using the byte order of the
9719 application binary), with L columns and N+1 rows, in row-major order.
9720 Each row in the array is indexed starting from 0. The first row provides
9721 a key to the remaining rows: each column in this row provides an identifier
9722 for a debug section, and the offsets in the same column of subsequent rows
9723 refer to that section. The section identifiers are:
9725 DW_SECT_INFO 1 .debug_info.dwo
9726 DW_SECT_TYPES 2 .debug_types.dwo
9727 DW_SECT_ABBREV 3 .debug_abbrev.dwo
9728 DW_SECT_LINE 4 .debug_line.dwo
9729 DW_SECT_LOC 5 .debug_loc.dwo
9730 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
9731 DW_SECT_MACINFO 7 .debug_macinfo.dwo
9732 DW_SECT_MACRO 8 .debug_macro.dwo
9734 The offsets provided by the CU and TU index sections are the base offsets
9735 for the contributions made by each CU or TU to the corresponding section
9736 in the package file. Each CU and TU header contains an abbrev_offset
9737 field, used to find the abbreviations table for that CU or TU within the
9738 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
9739 be interpreted as relative to the base offset given in the index section.
9740 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
9741 should be interpreted as relative to the base offset for .debug_line.dwo,
9742 and offsets into other debug sections obtained from DWARF attributes should
9743 also be interpreted as relative to the corresponding base offset.
9745 The table of sizes begins immediately following the table of offsets.
9746 Like the table of offsets, it is a two-dimensional array of 32-bit words,
9747 with L columns and N rows, in row-major order. Each row in the array is
9748 indexed starting from 1 (row 0 is shared by the two tables).
9752 Hash table lookup is handled the same in version 1 and 2:
9754 We assume that N and M will not exceed 2^32 - 1.
9755 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
9757 Given a 64-bit compilation unit signature or a type signature S, an entry
9758 in the hash table is located as follows:
9760 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
9761 the low-order k bits all set to 1.
9763 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
9765 3) If the hash table entry at index H matches the signature, use that
9766 entry. If the hash table entry at index H is unused (all zeroes),
9767 terminate the search: the signature is not present in the table.
9769 4) Let H = (H + H') modulo M. Repeat at Step 3.
9771 Because M > N and H' and M are relatively prime, the search is guaranteed
9772 to stop at an unused slot or find the match. */
9774 /* Create a hash table to map DWO IDs to their CU/TU entry in
9775 .debug_{info,types}.dwo in DWP_FILE.
9776 Returns NULL if there isn't one.
9777 Note: This function processes DWP files only, not DWO files. */
9779 static struct dwp_hash_table
*
9780 create_dwp_hash_table (struct dwp_file
*dwp_file
, int is_debug_types
)
9782 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9783 bfd
*dbfd
= dwp_file
->dbfd
;
9784 const gdb_byte
*index_ptr
, *index_end
;
9785 struct dwarf2_section_info
*index
;
9786 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
9787 struct dwp_hash_table
*htab
;
9790 index
= &dwp_file
->sections
.tu_index
;
9792 index
= &dwp_file
->sections
.cu_index
;
9794 if (dwarf2_section_empty_p (index
))
9796 dwarf2_read_section (objfile
, index
);
9798 index_ptr
= index
->buffer
;
9799 index_end
= index_ptr
+ index
->size
;
9801 version
= read_4_bytes (dbfd
, index_ptr
);
9804 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
9808 nr_units
= read_4_bytes (dbfd
, index_ptr
);
9810 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
9813 if (version
!= 1 && version
!= 2)
9815 error (_("Dwarf Error: unsupported DWP file version (%s)"
9817 pulongest (version
), dwp_file
->name
);
9819 if (nr_slots
!= (nr_slots
& -nr_slots
))
9821 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
9822 " is not power of 2 [in module %s]"),
9823 pulongest (nr_slots
), dwp_file
->name
);
9826 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
9827 htab
->version
= version
;
9828 htab
->nr_columns
= nr_columns
;
9829 htab
->nr_units
= nr_units
;
9830 htab
->nr_slots
= nr_slots
;
9831 htab
->hash_table
= index_ptr
;
9832 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
9834 /* Exit early if the table is empty. */
9835 if (nr_slots
== 0 || nr_units
== 0
9836 || (version
== 2 && nr_columns
== 0))
9838 /* All must be zero. */
9839 if (nr_slots
!= 0 || nr_units
!= 0
9840 || (version
== 2 && nr_columns
!= 0))
9842 complaint (&symfile_complaints
,
9843 _("Empty DWP but nr_slots,nr_units,nr_columns not"
9844 " all zero [in modules %s]"),
9852 htab
->section_pool
.v1
.indices
=
9853 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
9854 /* It's harder to decide whether the section is too small in v1.
9855 V1 is deprecated anyway so we punt. */
9859 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
9860 int *ids
= htab
->section_pool
.v2
.section_ids
;
9861 /* Reverse map for error checking. */
9862 int ids_seen
[DW_SECT_MAX
+ 1];
9867 error (_("Dwarf Error: bad DWP hash table, too few columns"
9868 " in section table [in module %s]"),
9871 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
9873 error (_("Dwarf Error: bad DWP hash table, too many columns"
9874 " in section table [in module %s]"),
9877 memset (ids
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
9878 memset (ids_seen
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
9879 for (i
= 0; i
< nr_columns
; ++i
)
9881 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
9883 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
9885 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
9886 " in section table [in module %s]"),
9887 id
, dwp_file
->name
);
9889 if (ids_seen
[id
] != -1)
9891 error (_("Dwarf Error: bad DWP hash table, duplicate section"
9892 " id %d in section table [in module %s]"),
9893 id
, dwp_file
->name
);
9898 /* Must have exactly one info or types section. */
9899 if (((ids_seen
[DW_SECT_INFO
] != -1)
9900 + (ids_seen
[DW_SECT_TYPES
] != -1))
9903 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
9904 " DWO info/types section [in module %s]"),
9907 /* Must have an abbrev section. */
9908 if (ids_seen
[DW_SECT_ABBREV
] == -1)
9910 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
9911 " section [in module %s]"),
9914 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
9915 htab
->section_pool
.v2
.sizes
=
9916 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
9917 * nr_units
* nr_columns
);
9918 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
9919 * nr_units
* nr_columns
))
9922 error (_("Dwarf Error: DWP index section is corrupt (too small)"
9931 /* Update SECTIONS with the data from SECTP.
9933 This function is like the other "locate" section routines that are
9934 passed to bfd_map_over_sections, but in this context the sections to
9935 read comes from the DWP V1 hash table, not the full ELF section table.
9937 The result is non-zero for success, or zero if an error was found. */
9940 locate_v1_virtual_dwo_sections (asection
*sectp
,
9941 struct virtual_v1_dwo_sections
*sections
)
9943 const struct dwop_section_names
*names
= &dwop_section_names
;
9945 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
9947 /* There can be only one. */
9948 if (sections
->abbrev
.s
.section
!= NULL
)
9950 sections
->abbrev
.s
.section
= sectp
;
9951 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
9953 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
9954 || section_is_p (sectp
->name
, &names
->types_dwo
))
9956 /* There can be only one. */
9957 if (sections
->info_or_types
.s
.section
!= NULL
)
9959 sections
->info_or_types
.s
.section
= sectp
;
9960 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
9962 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
9964 /* There can be only one. */
9965 if (sections
->line
.s
.section
!= NULL
)
9967 sections
->line
.s
.section
= sectp
;
9968 sections
->line
.size
= bfd_get_section_size (sectp
);
9970 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
9972 /* There can be only one. */
9973 if (sections
->loc
.s
.section
!= NULL
)
9975 sections
->loc
.s
.section
= sectp
;
9976 sections
->loc
.size
= bfd_get_section_size (sectp
);
9978 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
9980 /* There can be only one. */
9981 if (sections
->macinfo
.s
.section
!= NULL
)
9983 sections
->macinfo
.s
.section
= sectp
;
9984 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
9986 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
9988 /* There can be only one. */
9989 if (sections
->macro
.s
.section
!= NULL
)
9991 sections
->macro
.s
.section
= sectp
;
9992 sections
->macro
.size
= bfd_get_section_size (sectp
);
9994 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
9996 /* There can be only one. */
9997 if (sections
->str_offsets
.s
.section
!= NULL
)
9999 sections
->str_offsets
.s
.section
= sectp
;
10000 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
10004 /* No other kind of section is valid. */
10011 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
10012 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
10013 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
10014 This is for DWP version 1 files. */
10016 static struct dwo_unit
*
10017 create_dwo_unit_in_dwp_v1 (struct dwp_file
*dwp_file
,
10018 uint32_t unit_index
,
10019 const char *comp_dir
,
10020 ULONGEST signature
, int is_debug_types
)
10022 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10023 const struct dwp_hash_table
*dwp_htab
=
10024 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10025 bfd
*dbfd
= dwp_file
->dbfd
;
10026 const char *kind
= is_debug_types
? "TU" : "CU";
10027 struct dwo_file
*dwo_file
;
10028 struct dwo_unit
*dwo_unit
;
10029 struct virtual_v1_dwo_sections sections
;
10030 void **dwo_file_slot
;
10031 char *virtual_dwo_name
;
10032 struct dwarf2_section_info
*cutu
;
10033 struct cleanup
*cleanups
;
10036 gdb_assert (dwp_file
->version
== 1);
10038 if (dwarf_read_debug
)
10040 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
10042 pulongest (unit_index
), hex_string (signature
),
10046 /* Fetch the sections of this DWO unit.
10047 Put a limit on the number of sections we look for so that bad data
10048 doesn't cause us to loop forever. */
10050 #define MAX_NR_V1_DWO_SECTIONS \
10051 (1 /* .debug_info or .debug_types */ \
10052 + 1 /* .debug_abbrev */ \
10053 + 1 /* .debug_line */ \
10054 + 1 /* .debug_loc */ \
10055 + 1 /* .debug_str_offsets */ \
10056 + 1 /* .debug_macro or .debug_macinfo */ \
10057 + 1 /* trailing zero */)
10059 memset (§ions
, 0, sizeof (sections
));
10060 cleanups
= make_cleanup (null_cleanup
, 0);
10062 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
10065 uint32_t section_nr
=
10066 read_4_bytes (dbfd
,
10067 dwp_htab
->section_pool
.v1
.indices
10068 + (unit_index
+ i
) * sizeof (uint32_t));
10070 if (section_nr
== 0)
10072 if (section_nr
>= dwp_file
->num_sections
)
10074 error (_("Dwarf Error: bad DWP hash table, section number too large"
10075 " [in module %s]"),
10079 sectp
= dwp_file
->elf_sections
[section_nr
];
10080 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
10082 error (_("Dwarf Error: bad DWP hash table, invalid section found"
10083 " [in module %s]"),
10089 || dwarf2_section_empty_p (§ions
.info_or_types
)
10090 || dwarf2_section_empty_p (§ions
.abbrev
))
10092 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
10093 " [in module %s]"),
10096 if (i
== MAX_NR_V1_DWO_SECTIONS
)
10098 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
10099 " [in module %s]"),
10103 /* It's easier for the rest of the code if we fake a struct dwo_file and
10104 have dwo_unit "live" in that. At least for now.
10106 The DWP file can be made up of a random collection of CUs and TUs.
10107 However, for each CU + set of TUs that came from the same original DWO
10108 file, we can combine them back into a virtual DWO file to save space
10109 (fewer struct dwo_file objects to allocate). Remember that for really
10110 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10113 xstrprintf ("virtual-dwo/%d-%d-%d-%d",
10114 get_section_id (§ions
.abbrev
),
10115 get_section_id (§ions
.line
),
10116 get_section_id (§ions
.loc
),
10117 get_section_id (§ions
.str_offsets
));
10118 make_cleanup (xfree
, virtual_dwo_name
);
10119 /* Can we use an existing virtual DWO file? */
10120 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
10121 /* Create one if necessary. */
10122 if (*dwo_file_slot
== NULL
)
10124 if (dwarf_read_debug
)
10126 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
10129 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10131 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
10133 strlen (virtual_dwo_name
));
10134 dwo_file
->comp_dir
= comp_dir
;
10135 dwo_file
->sections
.abbrev
= sections
.abbrev
;
10136 dwo_file
->sections
.line
= sections
.line
;
10137 dwo_file
->sections
.loc
= sections
.loc
;
10138 dwo_file
->sections
.macinfo
= sections
.macinfo
;
10139 dwo_file
->sections
.macro
= sections
.macro
;
10140 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
10141 /* The "str" section is global to the entire DWP file. */
10142 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10143 /* The info or types section is assigned below to dwo_unit,
10144 there's no need to record it in dwo_file.
10145 Also, we can't simply record type sections in dwo_file because
10146 we record a pointer into the vector in dwo_unit. As we collect more
10147 types we'll grow the vector and eventually have to reallocate space
10148 for it, invalidating all copies of pointers into the previous
10150 *dwo_file_slot
= dwo_file
;
10154 if (dwarf_read_debug
)
10156 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10159 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
10161 do_cleanups (cleanups
);
10163 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10164 dwo_unit
->dwo_file
= dwo_file
;
10165 dwo_unit
->signature
= signature
;
10166 dwo_unit
->section
=
10167 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
10168 *dwo_unit
->section
= sections
.info_or_types
;
10169 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10174 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
10175 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
10176 piece within that section used by a TU/CU, return a virtual section
10177 of just that piece. */
10179 static struct dwarf2_section_info
10180 create_dwp_v2_section (struct dwarf2_section_info
*section
,
10181 bfd_size_type offset
, bfd_size_type size
)
10183 struct dwarf2_section_info result
;
10186 gdb_assert (section
!= NULL
);
10187 gdb_assert (!section
->is_virtual
);
10189 memset (&result
, 0, sizeof (result
));
10190 result
.s
.containing_section
= section
;
10191 result
.is_virtual
= 1;
10196 sectp
= get_section_bfd_section (section
);
10198 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
10199 bounds of the real section. This is a pretty-rare event, so just
10200 flag an error (easier) instead of a warning and trying to cope. */
10202 || offset
+ size
> bfd_get_section_size (sectp
))
10204 bfd
*abfd
= sectp
->owner
;
10206 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
10207 " in section %s [in module %s]"),
10208 sectp
? bfd_section_name (abfd
, sectp
) : "<unknown>",
10209 objfile_name (dwarf2_per_objfile
->objfile
));
10212 result
.virtual_offset
= offset
;
10213 result
.size
= size
;
10217 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
10218 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
10219 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
10220 This is for DWP version 2 files. */
10222 static struct dwo_unit
*
10223 create_dwo_unit_in_dwp_v2 (struct dwp_file
*dwp_file
,
10224 uint32_t unit_index
,
10225 const char *comp_dir
,
10226 ULONGEST signature
, int is_debug_types
)
10228 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10229 const struct dwp_hash_table
*dwp_htab
=
10230 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10231 bfd
*dbfd
= dwp_file
->dbfd
;
10232 const char *kind
= is_debug_types
? "TU" : "CU";
10233 struct dwo_file
*dwo_file
;
10234 struct dwo_unit
*dwo_unit
;
10235 struct virtual_v2_dwo_sections sections
;
10236 void **dwo_file_slot
;
10237 char *virtual_dwo_name
;
10238 struct dwarf2_section_info
*cutu
;
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
, *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 struct dwarf2_section_info
*section
;
11156 /* Note: dbfd is NULL for virtual DWO files. */
11157 gdb_bfd_unref (dwo_file
->dbfd
);
11159 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
11162 /* Wrapper for free_dwo_file for use in cleanups. */
11165 free_dwo_file_cleanup (void *arg
)
11167 struct dwo_file
*dwo_file
= (struct dwo_file
*) arg
;
11168 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11170 free_dwo_file (dwo_file
, objfile
);
11173 /* Traversal function for free_dwo_files. */
11176 free_dwo_file_from_slot (void **slot
, void *info
)
11178 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
11179 struct objfile
*objfile
= (struct objfile
*) info
;
11181 free_dwo_file (dwo_file
, objfile
);
11186 /* Free all resources associated with DWO_FILES. */
11189 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
11191 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
11194 /* Read in various DIEs. */
11196 /* qsort helper for inherit_abstract_dies. */
11199 unsigned_int_compar (const void *ap
, const void *bp
)
11201 unsigned int a
= *(unsigned int *) ap
;
11202 unsigned int b
= *(unsigned int *) bp
;
11204 return (a
> b
) - (b
> a
);
11207 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
11208 Inherit only the children of the DW_AT_abstract_origin DIE not being
11209 already referenced by DW_AT_abstract_origin from the children of the
11213 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
11215 struct die_info
*child_die
;
11216 unsigned die_children_count
;
11217 /* CU offsets which were referenced by children of the current DIE. */
11218 sect_offset
*offsets
;
11219 sect_offset
*offsets_end
, *offsetp
;
11220 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
11221 struct die_info
*origin_die
;
11222 /* Iterator of the ORIGIN_DIE children. */
11223 struct die_info
*origin_child_die
;
11224 struct cleanup
*cleanups
;
11225 struct attribute
*attr
;
11226 struct dwarf2_cu
*origin_cu
;
11227 struct pending
**origin_previous_list_in_scope
;
11229 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
11233 /* Note that following die references may follow to a die in a
11237 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
11239 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
11241 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
11242 origin_cu
->list_in_scope
= cu
->list_in_scope
;
11244 if (die
->tag
!= origin_die
->tag
11245 && !(die
->tag
== DW_TAG_inlined_subroutine
11246 && origin_die
->tag
== DW_TAG_subprogram
))
11247 complaint (&symfile_complaints
,
11248 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
11249 die
->offset
.sect_off
, origin_die
->offset
.sect_off
);
11251 child_die
= die
->child
;
11252 die_children_count
= 0;
11253 while (child_die
&& child_die
->tag
)
11255 child_die
= sibling_die (child_die
);
11256 die_children_count
++;
11258 offsets
= XNEWVEC (sect_offset
, die_children_count
);
11259 cleanups
= make_cleanup (xfree
, offsets
);
11261 offsets_end
= offsets
;
11262 for (child_die
= die
->child
;
11263 child_die
&& child_die
->tag
;
11264 child_die
= sibling_die (child_die
))
11266 struct die_info
*child_origin_die
;
11267 struct dwarf2_cu
*child_origin_cu
;
11269 /* We are trying to process concrete instance entries:
11270 DW_TAG_GNU_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
11271 it's not relevant to our analysis here. i.e. detecting DIEs that are
11272 present in the abstract instance but not referenced in the concrete
11274 if (child_die
->tag
== DW_TAG_GNU_call_site
)
11277 /* For each CHILD_DIE, find the corresponding child of
11278 ORIGIN_DIE. If there is more than one layer of
11279 DW_AT_abstract_origin, follow them all; there shouldn't be,
11280 but GCC versions at least through 4.4 generate this (GCC PR
11282 child_origin_die
= child_die
;
11283 child_origin_cu
= cu
;
11286 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
11290 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
11294 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
11295 counterpart may exist. */
11296 if (child_origin_die
!= child_die
)
11298 if (child_die
->tag
!= child_origin_die
->tag
11299 && !(child_die
->tag
== DW_TAG_inlined_subroutine
11300 && child_origin_die
->tag
== DW_TAG_subprogram
))
11301 complaint (&symfile_complaints
,
11302 _("Child DIE 0x%x and its abstract origin 0x%x have "
11303 "different tags"), child_die
->offset
.sect_off
,
11304 child_origin_die
->offset
.sect_off
);
11305 if (child_origin_die
->parent
!= origin_die
)
11306 complaint (&symfile_complaints
,
11307 _("Child DIE 0x%x and its abstract origin 0x%x have "
11308 "different parents"), child_die
->offset
.sect_off
,
11309 child_origin_die
->offset
.sect_off
);
11311 *offsets_end
++ = child_origin_die
->offset
;
11314 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
11315 unsigned_int_compar
);
11316 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
11317 if (offsetp
[-1].sect_off
== offsetp
->sect_off
)
11318 complaint (&symfile_complaints
,
11319 _("Multiple children of DIE 0x%x refer "
11320 "to DIE 0x%x as their abstract origin"),
11321 die
->offset
.sect_off
, offsetp
->sect_off
);
11324 origin_child_die
= origin_die
->child
;
11325 while (origin_child_die
&& origin_child_die
->tag
)
11327 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
11328 while (offsetp
< offsets_end
11329 && offsetp
->sect_off
< origin_child_die
->offset
.sect_off
)
11331 if (offsetp
>= offsets_end
11332 || offsetp
->sect_off
> origin_child_die
->offset
.sect_off
)
11334 /* Found that ORIGIN_CHILD_DIE is really not referenced.
11335 Check whether we're already processing ORIGIN_CHILD_DIE.
11336 This can happen with mutually referenced abstract_origins.
11338 if (!origin_child_die
->in_process
)
11339 process_die (origin_child_die
, origin_cu
);
11341 origin_child_die
= sibling_die (origin_child_die
);
11343 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
11345 do_cleanups (cleanups
);
11349 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11351 struct objfile
*objfile
= cu
->objfile
;
11352 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11353 struct context_stack
*newobj
;
11356 struct die_info
*child_die
;
11357 struct attribute
*attr
, *call_line
, *call_file
;
11359 CORE_ADDR baseaddr
;
11360 struct block
*block
;
11361 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
11362 VEC (symbolp
) *template_args
= NULL
;
11363 struct template_symbol
*templ_func
= NULL
;
11367 /* If we do not have call site information, we can't show the
11368 caller of this inlined function. That's too confusing, so
11369 only use the scope for local variables. */
11370 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
11371 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
11372 if (call_line
== NULL
|| call_file
== NULL
)
11374 read_lexical_block_scope (die
, cu
);
11379 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11381 name
= dwarf2_name (die
, cu
);
11383 /* Ignore functions with missing or empty names. These are actually
11384 illegal according to the DWARF standard. */
11387 complaint (&symfile_complaints
,
11388 _("missing name for subprogram DIE at %d"),
11389 die
->offset
.sect_off
);
11393 /* Ignore functions with missing or invalid low and high pc attributes. */
11394 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
11396 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
11397 if (!attr
|| !DW_UNSND (attr
))
11398 complaint (&symfile_complaints
,
11399 _("cannot get low and high bounds "
11400 "for subprogram DIE at %d"),
11401 die
->offset
.sect_off
);
11405 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11406 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
11408 /* If we have any template arguments, then we must allocate a
11409 different sort of symbol. */
11410 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
11412 if (child_die
->tag
== DW_TAG_template_type_param
11413 || child_die
->tag
== DW_TAG_template_value_param
)
11415 templ_func
= allocate_template_symbol (objfile
);
11416 templ_func
->base
.is_cplus_template_function
= 1;
11421 newobj
= push_context (0, lowpc
);
11422 newobj
->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
11423 (struct symbol
*) templ_func
);
11425 /* If there is a location expression for DW_AT_frame_base, record
11427 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
11429 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
11431 /* If there is a location for the static link, record it. */
11432 newobj
->static_link
= NULL
;
11433 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
11436 newobj
->static_link
11437 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
11438 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
);
11441 cu
->list_in_scope
= &local_symbols
;
11443 if (die
->child
!= NULL
)
11445 child_die
= die
->child
;
11446 while (child_die
&& child_die
->tag
)
11448 if (child_die
->tag
== DW_TAG_template_type_param
11449 || child_die
->tag
== DW_TAG_template_value_param
)
11451 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
11454 VEC_safe_push (symbolp
, template_args
, arg
);
11457 process_die (child_die
, cu
);
11458 child_die
= sibling_die (child_die
);
11462 inherit_abstract_dies (die
, cu
);
11464 /* If we have a DW_AT_specification, we might need to import using
11465 directives from the context of the specification DIE. See the
11466 comment in determine_prefix. */
11467 if (cu
->language
== language_cplus
11468 && dwarf2_attr (die
, DW_AT_specification
, cu
))
11470 struct dwarf2_cu
*spec_cu
= cu
;
11471 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
11475 child_die
= spec_die
->child
;
11476 while (child_die
&& child_die
->tag
)
11478 if (child_die
->tag
== DW_TAG_imported_module
)
11479 process_die (child_die
, spec_cu
);
11480 child_die
= sibling_die (child_die
);
11483 /* In some cases, GCC generates specification DIEs that
11484 themselves contain DW_AT_specification attributes. */
11485 spec_die
= die_specification (spec_die
, &spec_cu
);
11489 newobj
= pop_context ();
11490 /* Make a block for the local symbols within. */
11491 block
= finish_block (newobj
->name
, &local_symbols
, newobj
->old_blocks
,
11492 newobj
->static_link
, lowpc
, highpc
);
11494 /* For C++, set the block's scope. */
11495 if ((cu
->language
== language_cplus
11496 || cu
->language
== language_fortran
11497 || cu
->language
== language_d
)
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
))
11557 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11558 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
11560 push_context (0, lowpc
);
11561 if (die
->child
!= NULL
)
11563 child_die
= die
->child
;
11564 while (child_die
&& child_die
->tag
)
11566 process_die (child_die
, cu
);
11567 child_die
= sibling_die (child_die
);
11570 inherit_abstract_dies (die
, cu
);
11571 newobj
= pop_context ();
11573 if (local_symbols
!= NULL
|| local_using_directives
!= NULL
)
11575 struct block
*block
11576 = finish_block (0, &local_symbols
, newobj
->old_blocks
, NULL
,
11577 newobj
->start_addr
, highpc
);
11579 /* Note that recording ranges after traversing children, as we
11580 do here, means that recording a parent's ranges entails
11581 walking across all its children's ranges as they appear in
11582 the address map, which is quadratic behavior.
11584 It would be nicer to record the parent's ranges before
11585 traversing its children, simply overriding whatever you find
11586 there. But since we don't even decide whether to create a
11587 block until after we've traversed its children, that's hard
11589 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11591 local_symbols
= newobj
->locals
;
11592 local_using_directives
= newobj
->local_using_directives
;
11595 /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */
11598 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11600 struct objfile
*objfile
= cu
->objfile
;
11601 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11602 CORE_ADDR pc
, baseaddr
;
11603 struct attribute
*attr
;
11604 struct call_site
*call_site
, call_site_local
;
11607 struct die_info
*child_die
;
11609 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11611 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
11614 complaint (&symfile_complaints
,
11615 _("missing DW_AT_low_pc for DW_TAG_GNU_call_site "
11616 "DIE 0x%x [in module %s]"),
11617 die
->offset
.sect_off
, objfile_name (objfile
));
11620 pc
= attr_value_as_address (attr
) + baseaddr
;
11621 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
11623 if (cu
->call_site_htab
== NULL
)
11624 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
11625 NULL
, &objfile
->objfile_obstack
,
11626 hashtab_obstack_allocate
, NULL
);
11627 call_site_local
.pc
= pc
;
11628 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
11631 complaint (&symfile_complaints
,
11632 _("Duplicate PC %s for DW_TAG_GNU_call_site "
11633 "DIE 0x%x [in module %s]"),
11634 paddress (gdbarch
, pc
), die
->offset
.sect_off
,
11635 objfile_name (objfile
));
11639 /* Count parameters at the caller. */
11642 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
11643 child_die
= sibling_die (child_die
))
11645 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11647 complaint (&symfile_complaints
,
11648 _("Tag %d is not DW_TAG_GNU_call_site_parameter in "
11649 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11650 child_die
->tag
, child_die
->offset
.sect_off
,
11651 objfile_name (objfile
));
11659 = ((struct call_site
*)
11660 obstack_alloc (&objfile
->objfile_obstack
,
11661 sizeof (*call_site
)
11662 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
11664 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
11665 call_site
->pc
= pc
;
11667 if (dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
11669 struct die_info
*func_die
;
11671 /* Skip also over DW_TAG_inlined_subroutine. */
11672 for (func_die
= die
->parent
;
11673 func_die
&& func_die
->tag
!= DW_TAG_subprogram
11674 && func_die
->tag
!= DW_TAG_subroutine_type
;
11675 func_die
= func_die
->parent
);
11677 /* DW_AT_GNU_all_call_sites is a superset
11678 of DW_AT_GNU_all_tail_call_sites. */
11680 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
11681 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
11683 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
11684 not complete. But keep CALL_SITE for look ups via call_site_htab,
11685 both the initial caller containing the real return address PC and
11686 the final callee containing the current PC of a chain of tail
11687 calls do not need to have the tail call list complete. But any
11688 function candidate for a virtual tail call frame searched via
11689 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
11690 determined unambiguously. */
11694 struct type
*func_type
= NULL
;
11697 func_type
= get_die_type (func_die
, cu
);
11698 if (func_type
!= NULL
)
11700 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
11702 /* Enlist this call site to the function. */
11703 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
11704 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
11707 complaint (&symfile_complaints
,
11708 _("Cannot find function owning DW_TAG_GNU_call_site "
11709 "DIE 0x%x [in module %s]"),
11710 die
->offset
.sect_off
, objfile_name (objfile
));
11714 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
11716 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
11717 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
11718 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
11719 /* Keep NULL DWARF_BLOCK. */;
11720 else if (attr_form_is_block (attr
))
11722 struct dwarf2_locexpr_baton
*dlbaton
;
11724 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
11725 dlbaton
->data
= DW_BLOCK (attr
)->data
;
11726 dlbaton
->size
= DW_BLOCK (attr
)->size
;
11727 dlbaton
->per_cu
= cu
->per_cu
;
11729 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
11731 else if (attr_form_is_ref (attr
))
11733 struct dwarf2_cu
*target_cu
= cu
;
11734 struct die_info
*target_die
;
11736 target_die
= follow_die_ref (die
, attr
, &target_cu
);
11737 gdb_assert (target_cu
->objfile
== objfile
);
11738 if (die_is_declaration (target_die
, target_cu
))
11740 const char *target_physname
;
11742 /* Prefer the mangled name; otherwise compute the demangled one. */
11743 target_physname
= dwarf2_string_attr (target_die
,
11744 DW_AT_linkage_name
,
11746 if (target_physname
== NULL
)
11747 target_physname
= dwarf2_string_attr (target_die
,
11748 DW_AT_MIPS_linkage_name
,
11750 if (target_physname
== NULL
)
11751 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
11752 if (target_physname
== NULL
)
11753 complaint (&symfile_complaints
,
11754 _("DW_AT_GNU_call_site_target target DIE has invalid "
11755 "physname, for referencing DIE 0x%x [in module %s]"),
11756 die
->offset
.sect_off
, objfile_name (objfile
));
11758 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
11764 /* DW_AT_entry_pc should be preferred. */
11765 if (!dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
))
11766 complaint (&symfile_complaints
,
11767 _("DW_AT_GNU_call_site_target target DIE has invalid "
11768 "low pc, for referencing DIE 0x%x [in module %s]"),
11769 die
->offset
.sect_off
, objfile_name (objfile
));
11772 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11773 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
11778 complaint (&symfile_complaints
,
11779 _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither "
11780 "block nor reference, for DIE 0x%x [in module %s]"),
11781 die
->offset
.sect_off
, objfile_name (objfile
));
11783 call_site
->per_cu
= cu
->per_cu
;
11785 for (child_die
= die
->child
;
11786 child_die
&& child_die
->tag
;
11787 child_die
= sibling_die (child_die
))
11789 struct call_site_parameter
*parameter
;
11790 struct attribute
*loc
, *origin
;
11792 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11794 /* Already printed the complaint above. */
11798 gdb_assert (call_site
->parameter_count
< nparams
);
11799 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
11801 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
11802 specifies DW_TAG_formal_parameter. Value of the data assumed for the
11803 register is contained in DW_AT_GNU_call_site_value. */
11805 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
11806 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
11807 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
11809 sect_offset offset
;
11811 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
11812 offset
= dwarf2_get_ref_die_offset (origin
);
11813 if (!offset_in_cu_p (&cu
->header
, offset
))
11815 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
11816 binding can be done only inside one CU. Such referenced DIE
11817 therefore cannot be even moved to DW_TAG_partial_unit. */
11818 complaint (&symfile_complaints
,
11819 _("DW_AT_abstract_origin offset is not in CU for "
11820 "DW_TAG_GNU_call_site child DIE 0x%x "
11822 child_die
->offset
.sect_off
, objfile_name (objfile
));
11825 parameter
->u
.param_offset
.cu_off
= (offset
.sect_off
11826 - cu
->header
.offset
.sect_off
);
11828 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
11830 complaint (&symfile_complaints
,
11831 _("No DW_FORM_block* DW_AT_location for "
11832 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11833 child_die
->offset
.sect_off
, objfile_name (objfile
));
11838 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
11839 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
11840 if (parameter
->u
.dwarf_reg
!= -1)
11841 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
11842 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
11843 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
11844 ¶meter
->u
.fb_offset
))
11845 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
11848 complaint (&symfile_complaints
,
11849 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
11850 "for DW_FORM_block* DW_AT_location is supported for "
11851 "DW_TAG_GNU_call_site child DIE 0x%x "
11853 child_die
->offset
.sect_off
, objfile_name (objfile
));
11858 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
11859 if (!attr_form_is_block (attr
))
11861 complaint (&symfile_complaints
,
11862 _("No DW_FORM_block* DW_AT_GNU_call_site_value for "
11863 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11864 child_die
->offset
.sect_off
, objfile_name (objfile
));
11867 parameter
->value
= DW_BLOCK (attr
)->data
;
11868 parameter
->value_size
= DW_BLOCK (attr
)->size
;
11870 /* Parameters are not pre-cleared by memset above. */
11871 parameter
->data_value
= NULL
;
11872 parameter
->data_value_size
= 0;
11873 call_site
->parameter_count
++;
11875 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
11878 if (!attr_form_is_block (attr
))
11879 complaint (&symfile_complaints
,
11880 _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for "
11881 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11882 child_die
->offset
.sect_off
, objfile_name (objfile
));
11885 parameter
->data_value
= DW_BLOCK (attr
)->data
;
11886 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
11892 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
11893 Return 1 if the attributes are present and valid, otherwise, return 0.
11894 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
11897 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
11898 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
11899 struct partial_symtab
*ranges_pst
)
11901 struct objfile
*objfile
= cu
->objfile
;
11902 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11903 struct comp_unit_head
*cu_header
= &cu
->header
;
11904 bfd
*obfd
= objfile
->obfd
;
11905 unsigned int addr_size
= cu_header
->addr_size
;
11906 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
11907 /* Base address selection entry. */
11910 unsigned int dummy
;
11911 const gdb_byte
*buffer
;
11914 CORE_ADDR high
= 0;
11915 CORE_ADDR baseaddr
;
11917 found_base
= cu
->base_known
;
11918 base
= cu
->base_address
;
11920 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
11921 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
11923 complaint (&symfile_complaints
,
11924 _("Offset %d out of bounds for DW_AT_ranges attribute"),
11928 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
11932 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11936 CORE_ADDR range_beginning
, range_end
;
11938 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
11939 buffer
+= addr_size
;
11940 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
11941 buffer
+= addr_size
;
11942 offset
+= 2 * addr_size
;
11944 /* An end of list marker is a pair of zero addresses. */
11945 if (range_beginning
== 0 && range_end
== 0)
11946 /* Found the end of list entry. */
11949 /* Each base address selection entry is a pair of 2 values.
11950 The first is the largest possible address, the second is
11951 the base address. Check for a base address here. */
11952 if ((range_beginning
& mask
) == mask
)
11954 /* If we found the largest possible address, then we already
11955 have the base address in range_end. */
11963 /* We have no valid base address for the ranges
11965 complaint (&symfile_complaints
,
11966 _("Invalid .debug_ranges data (no base address)"));
11970 if (range_beginning
> range_end
)
11972 /* Inverted range entries are invalid. */
11973 complaint (&symfile_complaints
,
11974 _("Invalid .debug_ranges data (inverted range)"));
11978 /* Empty range entries have no effect. */
11979 if (range_beginning
== range_end
)
11982 range_beginning
+= base
;
11985 /* A not-uncommon case of bad debug info.
11986 Don't pollute the addrmap with bad data. */
11987 if (range_beginning
+ baseaddr
== 0
11988 && !dwarf2_per_objfile
->has_section_at_zero
)
11990 complaint (&symfile_complaints
,
11991 _(".debug_ranges entry has start address of zero"
11992 " [in module %s]"), objfile_name (objfile
));
11996 if (ranges_pst
!= NULL
)
12001 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
12002 range_beginning
+ baseaddr
);
12003 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
12004 range_end
+ baseaddr
);
12005 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
12009 /* FIXME: This is recording everything as a low-high
12010 segment of consecutive addresses. We should have a
12011 data structure for discontiguous block ranges
12015 low
= range_beginning
;
12021 if (range_beginning
< low
)
12022 low
= range_beginning
;
12023 if (range_end
> high
)
12029 /* If the first entry is an end-of-list marker, the range
12030 describes an empty scope, i.e. no instructions. */
12036 *high_return
= high
;
12040 /* Get low and high pc attributes from a die. Return 1 if the attributes
12041 are present and valid, otherwise, return 0. Return -1 if the range is
12042 discontinuous, i.e. derived from DW_AT_ranges information. */
12045 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
12046 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
12047 struct partial_symtab
*pst
)
12049 struct attribute
*attr
;
12050 struct attribute
*attr_high
;
12052 CORE_ADDR high
= 0;
12055 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
12058 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
12061 low
= attr_value_as_address (attr
);
12062 high
= attr_value_as_address (attr_high
);
12063 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
12067 /* Found high w/o low attribute. */
12070 /* Found consecutive range of addresses. */
12075 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
12078 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
12079 We take advantage of the fact that DW_AT_ranges does not appear
12080 in DW_TAG_compile_unit of DWO files. */
12081 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
12082 unsigned int ranges_offset
= (DW_UNSND (attr
)
12083 + (need_ranges_base
12087 /* Value of the DW_AT_ranges attribute is the offset in the
12088 .debug_ranges section. */
12089 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
12091 /* Found discontinuous range of addresses. */
12096 /* read_partial_die has also the strict LOW < HIGH requirement. */
12100 /* When using the GNU linker, .gnu.linkonce. sections are used to
12101 eliminate duplicate copies of functions and vtables and such.
12102 The linker will arbitrarily choose one and discard the others.
12103 The AT_*_pc values for such functions refer to local labels in
12104 these sections. If the section from that file was discarded, the
12105 labels are not in the output, so the relocs get a value of 0.
12106 If this is a discarded function, mark the pc bounds as invalid,
12107 so that GDB will ignore it. */
12108 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12117 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
12118 its low and high PC addresses. Do nothing if these addresses could not
12119 be determined. Otherwise, set LOWPC to the low address if it is smaller,
12120 and HIGHPC to the high address if greater than HIGHPC. */
12123 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
12124 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
12125 struct dwarf2_cu
*cu
)
12127 CORE_ADDR low
, high
;
12128 struct die_info
*child
= die
->child
;
12130 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
12132 *lowpc
= min (*lowpc
, low
);
12133 *highpc
= max (*highpc
, high
);
12136 /* If the language does not allow nested subprograms (either inside
12137 subprograms or lexical blocks), we're done. */
12138 if (cu
->language
!= language_ada
)
12141 /* Check all the children of the given DIE. If it contains nested
12142 subprograms, then check their pc bounds. Likewise, we need to
12143 check lexical blocks as well, as they may also contain subprogram
12145 while (child
&& child
->tag
)
12147 if (child
->tag
== DW_TAG_subprogram
12148 || child
->tag
== DW_TAG_lexical_block
)
12149 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
12150 child
= sibling_die (child
);
12154 /* Get the low and high pc's represented by the scope DIE, and store
12155 them in *LOWPC and *HIGHPC. If the correct values can't be
12156 determined, set *LOWPC to -1 and *HIGHPC to 0. */
12159 get_scope_pc_bounds (struct die_info
*die
,
12160 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
12161 struct dwarf2_cu
*cu
)
12163 CORE_ADDR best_low
= (CORE_ADDR
) -1;
12164 CORE_ADDR best_high
= (CORE_ADDR
) 0;
12165 CORE_ADDR current_low
, current_high
;
12167 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
12169 best_low
= current_low
;
12170 best_high
= current_high
;
12174 struct die_info
*child
= die
->child
;
12176 while (child
&& child
->tag
)
12178 switch (child
->tag
) {
12179 case DW_TAG_subprogram
:
12180 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
12182 case DW_TAG_namespace
:
12183 case DW_TAG_module
:
12184 /* FIXME: carlton/2004-01-16: Should we do this for
12185 DW_TAG_class_type/DW_TAG_structure_type, too? I think
12186 that current GCC's always emit the DIEs corresponding
12187 to definitions of methods of classes as children of a
12188 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
12189 the DIEs giving the declarations, which could be
12190 anywhere). But I don't see any reason why the
12191 standards says that they have to be there. */
12192 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
12194 if (current_low
!= ((CORE_ADDR
) -1))
12196 best_low
= min (best_low
, current_low
);
12197 best_high
= max (best_high
, current_high
);
12205 child
= sibling_die (child
);
12210 *highpc
= best_high
;
12213 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
12217 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
12218 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
12220 struct objfile
*objfile
= cu
->objfile
;
12221 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12222 struct attribute
*attr
;
12223 struct attribute
*attr_high
;
12225 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
12228 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
12231 CORE_ADDR low
= attr_value_as_address (attr
);
12232 CORE_ADDR high
= attr_value_as_address (attr_high
);
12234 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
12237 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
12238 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
12239 record_block_range (block
, low
, high
- 1);
12243 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
12246 bfd
*obfd
= objfile
->obfd
;
12247 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
12248 We take advantage of the fact that DW_AT_ranges does not appear
12249 in DW_TAG_compile_unit of DWO files. */
12250 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
12252 /* The value of the DW_AT_ranges attribute is the offset of the
12253 address range list in the .debug_ranges section. */
12254 unsigned long offset
= (DW_UNSND (attr
)
12255 + (need_ranges_base
? cu
->ranges_base
: 0));
12256 const gdb_byte
*buffer
;
12258 /* For some target architectures, but not others, the
12259 read_address function sign-extends the addresses it returns.
12260 To recognize base address selection entries, we need a
12262 unsigned int addr_size
= cu
->header
.addr_size
;
12263 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
12265 /* The base address, to which the next pair is relative. Note
12266 that this 'base' is a DWARF concept: most entries in a range
12267 list are relative, to reduce the number of relocs against the
12268 debugging information. This is separate from this function's
12269 'baseaddr' argument, which GDB uses to relocate debugging
12270 information from a shared library based on the address at
12271 which the library was loaded. */
12272 CORE_ADDR base
= cu
->base_address
;
12273 int base_known
= cu
->base_known
;
12275 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
12276 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
12278 complaint (&symfile_complaints
,
12279 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
12283 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
12287 unsigned int bytes_read
;
12288 CORE_ADDR start
, end
;
12290 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12291 buffer
+= bytes_read
;
12292 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12293 buffer
+= bytes_read
;
12295 /* Did we find the end of the range list? */
12296 if (start
== 0 && end
== 0)
12299 /* Did we find a base address selection entry? */
12300 else if ((start
& base_select_mask
) == base_select_mask
)
12306 /* We found an ordinary address range. */
12311 complaint (&symfile_complaints
,
12312 _("Invalid .debug_ranges data "
12313 "(no base address)"));
12319 /* Inverted range entries are invalid. */
12320 complaint (&symfile_complaints
,
12321 _("Invalid .debug_ranges data "
12322 "(inverted range)"));
12326 /* Empty range entries have no effect. */
12330 start
+= base
+ baseaddr
;
12331 end
+= base
+ baseaddr
;
12333 /* A not-uncommon case of bad debug info.
12334 Don't pollute the addrmap with bad data. */
12335 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12337 complaint (&symfile_complaints
,
12338 _(".debug_ranges entry has start address of zero"
12339 " [in module %s]"), objfile_name (objfile
));
12343 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
12344 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
12345 record_block_range (block
, start
, end
- 1);
12351 /* Check whether the producer field indicates either of GCC < 4.6, or the
12352 Intel C/C++ compiler, and cache the result in CU. */
12355 check_producer (struct dwarf2_cu
*cu
)
12360 if (cu
->producer
== NULL
)
12362 /* For unknown compilers expect their behavior is DWARF version
12365 GCC started to support .debug_types sections by -gdwarf-4 since
12366 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
12367 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
12368 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
12369 interpreted incorrectly by GDB now - GCC PR debug/48229. */
12371 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
12373 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
12374 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
12376 else if (startswith (cu
->producer
, "Intel(R) C"))
12377 cu
->producer_is_icc
= 1;
12380 /* For other non-GCC compilers, expect their behavior is DWARF version
12384 cu
->checked_producer
= 1;
12387 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
12388 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
12389 during 4.6.0 experimental. */
12392 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
12394 if (!cu
->checked_producer
)
12395 check_producer (cu
);
12397 return cu
->producer_is_gxx_lt_4_6
;
12400 /* Return the default accessibility type if it is not overriden by
12401 DW_AT_accessibility. */
12403 static enum dwarf_access_attribute
12404 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
12406 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
12408 /* The default DWARF 2 accessibility for members is public, the default
12409 accessibility for inheritance is private. */
12411 if (die
->tag
!= DW_TAG_inheritance
)
12412 return DW_ACCESS_public
;
12414 return DW_ACCESS_private
;
12418 /* DWARF 3+ defines the default accessibility a different way. The same
12419 rules apply now for DW_TAG_inheritance as for the members and it only
12420 depends on the container kind. */
12422 if (die
->parent
->tag
== DW_TAG_class_type
)
12423 return DW_ACCESS_private
;
12425 return DW_ACCESS_public
;
12429 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
12430 offset. If the attribute was not found return 0, otherwise return
12431 1. If it was found but could not properly be handled, set *OFFSET
12435 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
12438 struct attribute
*attr
;
12440 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
12445 /* Note that we do not check for a section offset first here.
12446 This is because DW_AT_data_member_location is new in DWARF 4,
12447 so if we see it, we can assume that a constant form is really
12448 a constant and not a section offset. */
12449 if (attr_form_is_constant (attr
))
12450 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
12451 else if (attr_form_is_section_offset (attr
))
12452 dwarf2_complex_location_expr_complaint ();
12453 else if (attr_form_is_block (attr
))
12454 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12456 dwarf2_complex_location_expr_complaint ();
12464 /* Add an aggregate field to the field list. */
12467 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
12468 struct dwarf2_cu
*cu
)
12470 struct objfile
*objfile
= cu
->objfile
;
12471 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12472 struct nextfield
*new_field
;
12473 struct attribute
*attr
;
12475 const char *fieldname
= "";
12477 /* Allocate a new field list entry and link it in. */
12478 new_field
= XNEW (struct nextfield
);
12479 make_cleanup (xfree
, new_field
);
12480 memset (new_field
, 0, sizeof (struct nextfield
));
12482 if (die
->tag
== DW_TAG_inheritance
)
12484 new_field
->next
= fip
->baseclasses
;
12485 fip
->baseclasses
= new_field
;
12489 new_field
->next
= fip
->fields
;
12490 fip
->fields
= new_field
;
12494 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
12496 new_field
->accessibility
= DW_UNSND (attr
);
12498 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
12499 if (new_field
->accessibility
!= DW_ACCESS_public
)
12500 fip
->non_public_fields
= 1;
12502 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
12504 new_field
->virtuality
= DW_UNSND (attr
);
12506 new_field
->virtuality
= DW_VIRTUALITY_none
;
12508 fp
= &new_field
->field
;
12510 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
12514 /* Data member other than a C++ static data member. */
12516 /* Get type of field. */
12517 fp
->type
= die_type (die
, cu
);
12519 SET_FIELD_BITPOS (*fp
, 0);
12521 /* Get bit size of field (zero if none). */
12522 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
12525 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
12529 FIELD_BITSIZE (*fp
) = 0;
12532 /* Get bit offset of field. */
12533 if (handle_data_member_location (die
, cu
, &offset
))
12534 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
12535 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
12538 if (gdbarch_bits_big_endian (gdbarch
))
12540 /* For big endian bits, the DW_AT_bit_offset gives the
12541 additional bit offset from the MSB of the containing
12542 anonymous object to the MSB of the field. We don't
12543 have to do anything special since we don't need to
12544 know the size of the anonymous object. */
12545 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
12549 /* For little endian bits, compute the bit offset to the
12550 MSB of the anonymous object, subtract off the number of
12551 bits from the MSB of the field to the MSB of the
12552 object, and then subtract off the number of bits of
12553 the field itself. The result is the bit offset of
12554 the LSB of the field. */
12555 int anonymous_size
;
12556 int bit_offset
= DW_UNSND (attr
);
12558 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12561 /* The size of the anonymous object containing
12562 the bit field is explicit, so use the
12563 indicated size (in bytes). */
12564 anonymous_size
= DW_UNSND (attr
);
12568 /* The size of the anonymous object containing
12569 the bit field must be inferred from the type
12570 attribute of the data member containing the
12572 anonymous_size
= TYPE_LENGTH (fp
->type
);
12574 SET_FIELD_BITPOS (*fp
,
12575 (FIELD_BITPOS (*fp
)
12576 + anonymous_size
* bits_per_byte
12577 - bit_offset
- FIELD_BITSIZE (*fp
)));
12581 /* Get name of field. */
12582 fieldname
= dwarf2_name (die
, cu
);
12583 if (fieldname
== NULL
)
12586 /* The name is already allocated along with this objfile, so we don't
12587 need to duplicate it for the type. */
12588 fp
->name
= fieldname
;
12590 /* Change accessibility for artificial fields (e.g. virtual table
12591 pointer or virtual base class pointer) to private. */
12592 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
12594 FIELD_ARTIFICIAL (*fp
) = 1;
12595 new_field
->accessibility
= DW_ACCESS_private
;
12596 fip
->non_public_fields
= 1;
12599 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
12601 /* C++ static member. */
12603 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
12604 is a declaration, but all versions of G++ as of this writing
12605 (so through at least 3.2.1) incorrectly generate
12606 DW_TAG_variable tags. */
12608 const char *physname
;
12610 /* Get name of field. */
12611 fieldname
= dwarf2_name (die
, cu
);
12612 if (fieldname
== NULL
)
12615 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
12617 /* Only create a symbol if this is an external value.
12618 new_symbol checks this and puts the value in the global symbol
12619 table, which we want. If it is not external, new_symbol
12620 will try to put the value in cu->list_in_scope which is wrong. */
12621 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
12623 /* A static const member, not much different than an enum as far as
12624 we're concerned, except that we can support more types. */
12625 new_symbol (die
, NULL
, cu
);
12628 /* Get physical name. */
12629 physname
= dwarf2_physname (fieldname
, die
, cu
);
12631 /* The name is already allocated along with this objfile, so we don't
12632 need to duplicate it for the type. */
12633 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
12634 FIELD_TYPE (*fp
) = die_type (die
, cu
);
12635 FIELD_NAME (*fp
) = fieldname
;
12637 else if (die
->tag
== DW_TAG_inheritance
)
12641 /* C++ base class field. */
12642 if (handle_data_member_location (die
, cu
, &offset
))
12643 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
12644 FIELD_BITSIZE (*fp
) = 0;
12645 FIELD_TYPE (*fp
) = die_type (die
, cu
);
12646 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
12647 fip
->nbaseclasses
++;
12651 /* Add a typedef defined in the scope of the FIP's class. */
12654 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
12655 struct dwarf2_cu
*cu
)
12657 struct objfile
*objfile
= cu
->objfile
;
12658 struct typedef_field_list
*new_field
;
12659 struct attribute
*attr
;
12660 struct typedef_field
*fp
;
12661 char *fieldname
= "";
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 struct dwarf_block blk
;
12971 offset
= (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
12973 blk
.size
= DW_BLOCK (attr
)->size
- offset
;
12974 blk
.data
= DW_BLOCK (attr
)->data
+ offset
;
12975 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12976 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
12977 dwarf2_complex_location_expr_complaint ();
12979 fnp
->voffset
/= cu
->header
.addr_size
;
12983 dwarf2_complex_location_expr_complaint ();
12985 if (!fnp
->fcontext
)
12987 /* If there is no `this' field and no DW_AT_containing_type,
12988 we cannot actually find a base class context for the
12990 if (TYPE_NFIELDS (this_type
) == 0
12991 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
12993 complaint (&symfile_complaints
,
12994 _("cannot determine context for virtual member "
12995 "function \"%s\" (offset %d)"),
12996 fieldname
, die
->offset
.sect_off
);
13001 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
13005 else if (attr_form_is_section_offset (attr
))
13007 dwarf2_complex_location_expr_complaint ();
13011 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
13017 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
13018 if (attr
&& DW_UNSND (attr
))
13020 /* GCC does this, as of 2008-08-25; PR debug/37237. */
13021 complaint (&symfile_complaints
,
13022 _("Member function \"%s\" (offset %d) is virtual "
13023 "but the vtable offset is not specified"),
13024 fieldname
, die
->offset
.sect_off
);
13025 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13026 TYPE_CPLUS_DYNAMIC (type
) = 1;
13031 /* Create the vector of member function fields, and attach it to the type. */
13034 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
13035 struct dwarf2_cu
*cu
)
13037 struct fnfieldlist
*flp
;
13040 if (cu
->language
== language_ada
)
13041 error (_("unexpected member functions in Ada type"));
13043 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13044 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
13045 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
13047 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
13049 struct nextfnfield
*nfp
= flp
->head
;
13050 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
13053 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
13054 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
13055 fn_flp
->fn_fields
= (struct fn_field
*)
13056 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
13057 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
13058 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
13061 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
13064 /* Returns non-zero if NAME is the name of a vtable member in CU's
13065 language, zero otherwise. */
13067 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
13069 static const char vptr
[] = "_vptr";
13070 static const char vtable
[] = "vtable";
13072 /* Look for the C++ and Java forms of the vtable. */
13073 if ((cu
->language
== language_java
13074 && startswith (name
, vtable
))
13075 || (startswith (name
, vptr
)
13076 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
13082 /* GCC outputs unnamed structures that are really pointers to member
13083 functions, with the ABI-specified layout. If TYPE describes
13084 such a structure, smash it into a member function type.
13086 GCC shouldn't do this; it should just output pointer to member DIEs.
13087 This is GCC PR debug/28767. */
13090 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
13092 struct type
*pfn_type
, *self_type
, *new_type
;
13094 /* Check for a structure with no name and two children. */
13095 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
13098 /* Check for __pfn and __delta members. */
13099 if (TYPE_FIELD_NAME (type
, 0) == NULL
13100 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
13101 || TYPE_FIELD_NAME (type
, 1) == NULL
13102 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
13105 /* Find the type of the method. */
13106 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
13107 if (pfn_type
== NULL
13108 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
13109 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
13112 /* Look for the "this" argument. */
13113 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
13114 if (TYPE_NFIELDS (pfn_type
) == 0
13115 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
13116 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
13119 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
13120 new_type
= alloc_type (objfile
);
13121 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
13122 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
13123 TYPE_VARARGS (pfn_type
));
13124 smash_to_methodptr_type (type
, new_type
);
13127 /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler
13131 producer_is_icc (struct dwarf2_cu
*cu
)
13133 if (!cu
->checked_producer
)
13134 check_producer (cu
);
13136 return cu
->producer_is_icc
;
13139 /* Called when we find the DIE that starts a structure or union scope
13140 (definition) to create a type for the structure or union. Fill in
13141 the type's name and general properties; the members will not be
13142 processed until process_structure_scope. A symbol table entry for
13143 the type will also not be done until process_structure_scope (assuming
13144 the type has a name).
13146 NOTE: we need to call these functions regardless of whether or not the
13147 DIE has a DW_AT_name attribute, since it might be an anonymous
13148 structure or union. This gets the type entered into our set of
13149 user defined types. */
13151 static struct type
*
13152 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13154 struct objfile
*objfile
= cu
->objfile
;
13156 struct attribute
*attr
;
13159 /* If the definition of this type lives in .debug_types, read that type.
13160 Don't follow DW_AT_specification though, that will take us back up
13161 the chain and we want to go down. */
13162 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
13165 type
= get_DW_AT_signature_type (die
, attr
, cu
);
13167 /* The type's CU may not be the same as CU.
13168 Ensure TYPE is recorded with CU in die_type_hash. */
13169 return set_die_type (die
, type
, cu
);
13172 type
= alloc_type (objfile
);
13173 INIT_CPLUS_SPECIFIC (type
);
13175 name
= dwarf2_name (die
, cu
);
13178 if (cu
->language
== language_cplus
13179 || cu
->language
== language_java
13180 || cu
->language
== language_d
)
13182 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
13184 /* dwarf2_full_name might have already finished building the DIE's
13185 type. If so, there is no need to continue. */
13186 if (get_die_type (die
, cu
) != NULL
)
13187 return get_die_type (die
, cu
);
13189 TYPE_TAG_NAME (type
) = full_name
;
13190 if (die
->tag
== DW_TAG_structure_type
13191 || die
->tag
== DW_TAG_class_type
)
13192 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
13196 /* The name is already allocated along with this objfile, so
13197 we don't need to duplicate it for the type. */
13198 TYPE_TAG_NAME (type
) = name
;
13199 if (die
->tag
== DW_TAG_class_type
)
13200 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
13204 if (die
->tag
== DW_TAG_structure_type
)
13206 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13208 else if (die
->tag
== DW_TAG_union_type
)
13210 TYPE_CODE (type
) = TYPE_CODE_UNION
;
13214 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13217 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
13218 TYPE_DECLARED_CLASS (type
) = 1;
13220 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13223 if (attr_form_is_constant (attr
))
13224 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13227 /* For the moment, dynamic type sizes are not supported
13228 by GDB's struct type. The actual size is determined
13229 on-demand when resolving the type of a given object,
13230 so set the type's length to zero for now. Otherwise,
13231 we record an expression as the length, and that expression
13232 could lead to a very large value, which could eventually
13233 lead to us trying to allocate that much memory when creating
13234 a value of that type. */
13235 TYPE_LENGTH (type
) = 0;
13240 TYPE_LENGTH (type
) = 0;
13243 if (producer_is_icc (cu
) && (TYPE_LENGTH (type
) == 0))
13245 /* ICC does not output the required DW_AT_declaration
13246 on incomplete types, but gives them a size of zero. */
13247 TYPE_STUB (type
) = 1;
13250 TYPE_STUB_SUPPORTED (type
) = 1;
13252 if (die_is_declaration (die
, cu
))
13253 TYPE_STUB (type
) = 1;
13254 else if (attr
== NULL
&& die
->child
== NULL
13255 && producer_is_realview (cu
->producer
))
13256 /* RealView does not output the required DW_AT_declaration
13257 on incomplete types. */
13258 TYPE_STUB (type
) = 1;
13260 /* We need to add the type field to the die immediately so we don't
13261 infinitely recurse when dealing with pointers to the structure
13262 type within the structure itself. */
13263 set_die_type (die
, type
, cu
);
13265 /* set_die_type should be already done. */
13266 set_descriptive_type (type
, die
, cu
);
13271 /* Finish creating a structure or union type, including filling in
13272 its members and creating a symbol for it. */
13275 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13277 struct objfile
*objfile
= cu
->objfile
;
13278 struct die_info
*child_die
;
13281 type
= get_die_type (die
, cu
);
13283 type
= read_structure_type (die
, cu
);
13285 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
13287 struct field_info fi
;
13288 VEC (symbolp
) *template_args
= NULL
;
13289 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
13291 memset (&fi
, 0, sizeof (struct field_info
));
13293 child_die
= die
->child
;
13295 while (child_die
&& child_die
->tag
)
13297 if (child_die
->tag
== DW_TAG_member
13298 || child_die
->tag
== DW_TAG_variable
)
13300 /* NOTE: carlton/2002-11-05: A C++ static data member
13301 should be a DW_TAG_member that is a declaration, but
13302 all versions of G++ as of this writing (so through at
13303 least 3.2.1) incorrectly generate DW_TAG_variable
13304 tags for them instead. */
13305 dwarf2_add_field (&fi
, child_die
, cu
);
13307 else if (child_die
->tag
== DW_TAG_subprogram
)
13309 /* C++ member function. */
13310 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
13312 else if (child_die
->tag
== DW_TAG_inheritance
)
13314 /* C++ base class field. */
13315 dwarf2_add_field (&fi
, child_die
, cu
);
13317 else if (child_die
->tag
== DW_TAG_typedef
)
13318 dwarf2_add_typedef (&fi
, child_die
, cu
);
13319 else if (child_die
->tag
== DW_TAG_template_type_param
13320 || child_die
->tag
== DW_TAG_template_value_param
)
13322 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13325 VEC_safe_push (symbolp
, template_args
, arg
);
13328 child_die
= sibling_die (child_die
);
13331 /* Attach template arguments to type. */
13332 if (! VEC_empty (symbolp
, template_args
))
13334 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13335 TYPE_N_TEMPLATE_ARGUMENTS (type
)
13336 = VEC_length (symbolp
, template_args
);
13337 TYPE_TEMPLATE_ARGUMENTS (type
)
13338 = XOBNEWVEC (&objfile
->objfile_obstack
,
13340 TYPE_N_TEMPLATE_ARGUMENTS (type
));
13341 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
13342 VEC_address (symbolp
, template_args
),
13343 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
13344 * sizeof (struct symbol
*)));
13345 VEC_free (symbolp
, template_args
);
13348 /* Attach fields and member functions to the type. */
13350 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
13353 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
13355 /* Get the type which refers to the base class (possibly this
13356 class itself) which contains the vtable pointer for the current
13357 class from the DW_AT_containing_type attribute. This use of
13358 DW_AT_containing_type is a GNU extension. */
13360 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
13362 struct type
*t
= die_containing_type (die
, cu
);
13364 set_type_vptr_basetype (type
, t
);
13369 /* Our own class provides vtbl ptr. */
13370 for (i
= TYPE_NFIELDS (t
) - 1;
13371 i
>= TYPE_N_BASECLASSES (t
);
13374 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
13376 if (is_vtable_name (fieldname
, cu
))
13378 set_type_vptr_fieldno (type
, i
);
13383 /* Complain if virtual function table field not found. */
13384 if (i
< TYPE_N_BASECLASSES (t
))
13385 complaint (&symfile_complaints
,
13386 _("virtual function table pointer "
13387 "not found when defining class '%s'"),
13388 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
13393 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
13396 else if (cu
->producer
13397 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
13399 /* The IBM XLC compiler does not provide direct indication
13400 of the containing type, but the vtable pointer is
13401 always named __vfp. */
13405 for (i
= TYPE_NFIELDS (type
) - 1;
13406 i
>= TYPE_N_BASECLASSES (type
);
13409 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
13411 set_type_vptr_fieldno (type
, i
);
13412 set_type_vptr_basetype (type
, type
);
13419 /* Copy fi.typedef_field_list linked list elements content into the
13420 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
13421 if (fi
.typedef_field_list
)
13423 int i
= fi
.typedef_field_list_count
;
13425 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13426 TYPE_TYPEDEF_FIELD_ARRAY (type
)
13427 = ((struct typedef_field
*)
13428 TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
));
13429 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
13431 /* Reverse the list order to keep the debug info elements order. */
13434 struct typedef_field
*dest
, *src
;
13436 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
13437 src
= &fi
.typedef_field_list
->field
;
13438 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
13443 do_cleanups (back_to
);
13445 if (HAVE_CPLUS_STRUCT (type
))
13446 TYPE_CPLUS_REALLY_JAVA (type
) = cu
->language
== language_java
;
13449 quirk_gcc_member_function_pointer (type
, objfile
);
13451 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
13452 snapshots) has been known to create a die giving a declaration
13453 for a class that has, as a child, a die giving a definition for a
13454 nested class. So we have to process our children even if the
13455 current die is a declaration. Normally, of course, a declaration
13456 won't have any children at all. */
13458 child_die
= die
->child
;
13460 while (child_die
!= NULL
&& child_die
->tag
)
13462 if (child_die
->tag
== DW_TAG_member
13463 || child_die
->tag
== DW_TAG_variable
13464 || child_die
->tag
== DW_TAG_inheritance
13465 || child_die
->tag
== DW_TAG_template_value_param
13466 || child_die
->tag
== DW_TAG_template_type_param
)
13471 process_die (child_die
, cu
);
13473 child_die
= sibling_die (child_die
);
13476 /* Do not consider external references. According to the DWARF standard,
13477 these DIEs are identified by the fact that they have no byte_size
13478 attribute, and a declaration attribute. */
13479 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
13480 || !die_is_declaration (die
, cu
))
13481 new_symbol (die
, type
, cu
);
13484 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
13485 update TYPE using some information only available in DIE's children. */
13488 update_enumeration_type_from_children (struct die_info
*die
,
13490 struct dwarf2_cu
*cu
)
13492 struct obstack obstack
;
13493 struct die_info
*child_die
;
13494 int unsigned_enum
= 1;
13497 struct cleanup
*old_chain
;
13499 obstack_init (&obstack
);
13500 old_chain
= make_cleanup_obstack_free (&obstack
);
13502 for (child_die
= die
->child
;
13503 child_die
!= NULL
&& child_die
->tag
;
13504 child_die
= sibling_die (child_die
))
13506 struct attribute
*attr
;
13508 const gdb_byte
*bytes
;
13509 struct dwarf2_locexpr_baton
*baton
;
13512 if (child_die
->tag
!= DW_TAG_enumerator
)
13515 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
13519 name
= dwarf2_name (child_die
, cu
);
13521 name
= "<anonymous enumerator>";
13523 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
13524 &value
, &bytes
, &baton
);
13530 else if ((mask
& value
) != 0)
13535 /* If we already know that the enum type is neither unsigned, nor
13536 a flag type, no need to look at the rest of the enumerates. */
13537 if (!unsigned_enum
&& !flag_enum
)
13542 TYPE_UNSIGNED (type
) = 1;
13544 TYPE_FLAG_ENUM (type
) = 1;
13546 do_cleanups (old_chain
);
13549 /* Given a DW_AT_enumeration_type die, set its type. We do not
13550 complete the type's fields yet, or create any symbols. */
13552 static struct type
*
13553 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13555 struct objfile
*objfile
= cu
->objfile
;
13557 struct attribute
*attr
;
13560 /* If the definition of this type lives in .debug_types, read that type.
13561 Don't follow DW_AT_specification though, that will take us back up
13562 the chain and we want to go down. */
13563 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
13566 type
= get_DW_AT_signature_type (die
, attr
, cu
);
13568 /* The type's CU may not be the same as CU.
13569 Ensure TYPE is recorded with CU in die_type_hash. */
13570 return set_die_type (die
, type
, cu
);
13573 type
= alloc_type (objfile
);
13575 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
13576 name
= dwarf2_full_name (NULL
, die
, cu
);
13578 TYPE_TAG_NAME (type
) = name
;
13580 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
13583 struct type
*underlying_type
= die_type (die
, cu
);
13585 TYPE_TARGET_TYPE (type
) = underlying_type
;
13588 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13591 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13595 TYPE_LENGTH (type
) = 0;
13598 /* The enumeration DIE can be incomplete. In Ada, any type can be
13599 declared as private in the package spec, and then defined only
13600 inside the package body. Such types are known as Taft Amendment
13601 Types. When another package uses such a type, an incomplete DIE
13602 may be generated by the compiler. */
13603 if (die_is_declaration (die
, cu
))
13604 TYPE_STUB (type
) = 1;
13606 /* Finish the creation of this type by using the enum's children.
13607 We must call this even when the underlying type has been provided
13608 so that we can determine if we're looking at a "flag" enum. */
13609 update_enumeration_type_from_children (die
, type
, cu
);
13611 /* If this type has an underlying type that is not a stub, then we
13612 may use its attributes. We always use the "unsigned" attribute
13613 in this situation, because ordinarily we guess whether the type
13614 is unsigned -- but the guess can be wrong and the underlying type
13615 can tell us the reality. However, we defer to a local size
13616 attribute if one exists, because this lets the compiler override
13617 the underlying type if needed. */
13618 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
13620 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
13621 if (TYPE_LENGTH (type
) == 0)
13622 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
13625 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
13627 return set_die_type (die
, type
, cu
);
13630 /* Given a pointer to a die which begins an enumeration, process all
13631 the dies that define the members of the enumeration, and create the
13632 symbol for the enumeration type.
13634 NOTE: We reverse the order of the element list. */
13637 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13639 struct type
*this_type
;
13641 this_type
= get_die_type (die
, cu
);
13642 if (this_type
== NULL
)
13643 this_type
= read_enumeration_type (die
, cu
);
13645 if (die
->child
!= NULL
)
13647 struct die_info
*child_die
;
13648 struct symbol
*sym
;
13649 struct field
*fields
= NULL
;
13650 int num_fields
= 0;
13653 child_die
= die
->child
;
13654 while (child_die
&& child_die
->tag
)
13656 if (child_die
->tag
!= DW_TAG_enumerator
)
13658 process_die (child_die
, cu
);
13662 name
= dwarf2_name (child_die
, cu
);
13665 sym
= new_symbol (child_die
, this_type
, cu
);
13667 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
13669 fields
= (struct field
*)
13671 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
13672 * sizeof (struct field
));
13675 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
13676 FIELD_TYPE (fields
[num_fields
]) = NULL
;
13677 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
13678 FIELD_BITSIZE (fields
[num_fields
]) = 0;
13684 child_die
= sibling_die (child_die
);
13689 TYPE_NFIELDS (this_type
) = num_fields
;
13690 TYPE_FIELDS (this_type
) = (struct field
*)
13691 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
13692 memcpy (TYPE_FIELDS (this_type
), fields
,
13693 sizeof (struct field
) * num_fields
);
13698 /* If we are reading an enum from a .debug_types unit, and the enum
13699 is a declaration, and the enum is not the signatured type in the
13700 unit, then we do not want to add a symbol for it. Adding a
13701 symbol would in some cases obscure the true definition of the
13702 enum, giving users an incomplete type when the definition is
13703 actually available. Note that we do not want to do this for all
13704 enums which are just declarations, because C++0x allows forward
13705 enum declarations. */
13706 if (cu
->per_cu
->is_debug_types
13707 && die_is_declaration (die
, cu
))
13709 struct signatured_type
*sig_type
;
13711 sig_type
= (struct signatured_type
*) cu
->per_cu
;
13712 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
13713 if (sig_type
->type_offset_in_section
.sect_off
!= die
->offset
.sect_off
)
13717 new_symbol (die
, this_type
, cu
);
13720 /* Extract all information from a DW_TAG_array_type DIE and put it in
13721 the DIE's type field. For now, this only handles one dimensional
13724 static struct type
*
13725 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13727 struct objfile
*objfile
= cu
->objfile
;
13728 struct die_info
*child_die
;
13730 struct type
*element_type
, *range_type
, *index_type
;
13731 struct type
**range_types
= NULL
;
13732 struct attribute
*attr
;
13734 struct cleanup
*back_to
;
13736 unsigned int bit_stride
= 0;
13738 element_type
= die_type (die
, cu
);
13740 /* The die_type call above may have already set the type for this DIE. */
13741 type
= get_die_type (die
, cu
);
13745 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
13747 bit_stride
= DW_UNSND (attr
) * 8;
13749 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
13751 bit_stride
= DW_UNSND (attr
);
13753 /* Irix 6.2 native cc creates array types without children for
13754 arrays with unspecified length. */
13755 if (die
->child
== NULL
)
13757 index_type
= objfile_type (objfile
)->builtin_int
;
13758 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
13759 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
13761 return set_die_type (die
, type
, cu
);
13764 back_to
= make_cleanup (null_cleanup
, NULL
);
13765 child_die
= die
->child
;
13766 while (child_die
&& child_die
->tag
)
13768 if (child_die
->tag
== DW_TAG_subrange_type
)
13770 struct type
*child_type
= read_type_die (child_die
, cu
);
13772 if (child_type
!= NULL
)
13774 /* The range type was succesfully read. Save it for the
13775 array type creation. */
13776 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
13778 range_types
= (struct type
**)
13779 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
13780 * sizeof (struct type
*));
13782 make_cleanup (free_current_contents
, &range_types
);
13784 range_types
[ndim
++] = child_type
;
13787 child_die
= sibling_die (child_die
);
13790 /* Dwarf2 dimensions are output from left to right, create the
13791 necessary array types in backwards order. */
13793 type
= element_type
;
13795 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
13800 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
13806 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
13810 /* Understand Dwarf2 support for vector types (like they occur on
13811 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
13812 array type. This is not part of the Dwarf2/3 standard yet, but a
13813 custom vendor extension. The main difference between a regular
13814 array and the vector variant is that vectors are passed by value
13816 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
13818 make_vector_type (type
);
13820 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
13821 implementation may choose to implement triple vectors using this
13823 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13826 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
13827 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13829 complaint (&symfile_complaints
,
13830 _("DW_AT_byte_size for array type smaller "
13831 "than the total size of elements"));
13834 name
= dwarf2_name (die
, cu
);
13836 TYPE_NAME (type
) = name
;
13838 /* Install the type in the die. */
13839 set_die_type (die
, type
, cu
);
13841 /* set_die_type should be already done. */
13842 set_descriptive_type (type
, die
, cu
);
13844 do_cleanups (back_to
);
13849 static enum dwarf_array_dim_ordering
13850 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
13852 struct attribute
*attr
;
13854 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
13857 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
13859 /* GNU F77 is a special case, as at 08/2004 array type info is the
13860 opposite order to the dwarf2 specification, but data is still
13861 laid out as per normal fortran.
13863 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
13864 version checking. */
13866 if (cu
->language
== language_fortran
13867 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
13869 return DW_ORD_row_major
;
13872 switch (cu
->language_defn
->la_array_ordering
)
13874 case array_column_major
:
13875 return DW_ORD_col_major
;
13876 case array_row_major
:
13878 return DW_ORD_row_major
;
13882 /* Extract all information from a DW_TAG_set_type DIE and put it in
13883 the DIE's type field. */
13885 static struct type
*
13886 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13888 struct type
*domain_type
, *set_type
;
13889 struct attribute
*attr
;
13891 domain_type
= die_type (die
, cu
);
13893 /* The die_type call above may have already set the type for this DIE. */
13894 set_type
= get_die_type (die
, cu
);
13898 set_type
= create_set_type (NULL
, domain_type
);
13900 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13902 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
13904 return set_die_type (die
, set_type
, cu
);
13907 /* A helper for read_common_block that creates a locexpr baton.
13908 SYM is the symbol which we are marking as computed.
13909 COMMON_DIE is the DIE for the common block.
13910 COMMON_LOC is the location expression attribute for the common
13912 MEMBER_LOC is the location expression attribute for the particular
13913 member of the common block that we are processing.
13914 CU is the CU from which the above come. */
13917 mark_common_block_symbol_computed (struct symbol
*sym
,
13918 struct die_info
*common_die
,
13919 struct attribute
*common_loc
,
13920 struct attribute
*member_loc
,
13921 struct dwarf2_cu
*cu
)
13923 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13924 struct dwarf2_locexpr_baton
*baton
;
13926 unsigned int cu_off
;
13927 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
13928 LONGEST offset
= 0;
13930 gdb_assert (common_loc
&& member_loc
);
13931 gdb_assert (attr_form_is_block (common_loc
));
13932 gdb_assert (attr_form_is_block (member_loc
)
13933 || attr_form_is_constant (member_loc
));
13935 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
13936 baton
->per_cu
= cu
->per_cu
;
13937 gdb_assert (baton
->per_cu
);
13939 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
13941 if (attr_form_is_constant (member_loc
))
13943 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
13944 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
13947 baton
->size
+= DW_BLOCK (member_loc
)->size
;
13949 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
13952 *ptr
++ = DW_OP_call4
;
13953 cu_off
= common_die
->offset
.sect_off
- cu
->per_cu
->offset
.sect_off
;
13954 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
13957 if (attr_form_is_constant (member_loc
))
13959 *ptr
++ = DW_OP_addr
;
13960 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
13961 ptr
+= cu
->header
.addr_size
;
13965 /* We have to copy the data here, because DW_OP_call4 will only
13966 use a DW_AT_location attribute. */
13967 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
13968 ptr
+= DW_BLOCK (member_loc
)->size
;
13971 *ptr
++ = DW_OP_plus
;
13972 gdb_assert (ptr
- baton
->data
== baton
->size
);
13974 SYMBOL_LOCATION_BATON (sym
) = baton
;
13975 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
13978 /* Create appropriate locally-scoped variables for all the
13979 DW_TAG_common_block entries. Also create a struct common_block
13980 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
13981 is used to sepate the common blocks name namespace from regular
13985 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
13987 struct attribute
*attr
;
13989 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
13992 /* Support the .debug_loc offsets. */
13993 if (attr_form_is_block (attr
))
13997 else if (attr_form_is_section_offset (attr
))
13999 dwarf2_complex_location_expr_complaint ();
14004 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
14005 "common block member");
14010 if (die
->child
!= NULL
)
14012 struct objfile
*objfile
= cu
->objfile
;
14013 struct die_info
*child_die
;
14014 size_t n_entries
= 0, size
;
14015 struct common_block
*common_block
;
14016 struct symbol
*sym
;
14018 for (child_die
= die
->child
;
14019 child_die
&& child_die
->tag
;
14020 child_die
= sibling_die (child_die
))
14023 size
= (sizeof (struct common_block
)
14024 + (n_entries
- 1) * sizeof (struct symbol
*));
14026 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
14028 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
14029 common_block
->n_entries
= 0;
14031 for (child_die
= die
->child
;
14032 child_die
&& child_die
->tag
;
14033 child_die
= sibling_die (child_die
))
14035 /* Create the symbol in the DW_TAG_common_block block in the current
14037 sym
= new_symbol (child_die
, NULL
, cu
);
14040 struct attribute
*member_loc
;
14042 common_block
->contents
[common_block
->n_entries
++] = sym
;
14044 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
14048 /* GDB has handled this for a long time, but it is
14049 not specified by DWARF. It seems to have been
14050 emitted by gfortran at least as recently as:
14051 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
14052 complaint (&symfile_complaints
,
14053 _("Variable in common block has "
14054 "DW_AT_data_member_location "
14055 "- DIE at 0x%x [in module %s]"),
14056 child_die
->offset
.sect_off
,
14057 objfile_name (cu
->objfile
));
14059 if (attr_form_is_section_offset (member_loc
))
14060 dwarf2_complex_location_expr_complaint ();
14061 else if (attr_form_is_constant (member_loc
)
14062 || attr_form_is_block (member_loc
))
14065 mark_common_block_symbol_computed (sym
, die
, attr
,
14069 dwarf2_complex_location_expr_complaint ();
14074 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
14075 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
14079 /* Create a type for a C++ namespace. */
14081 static struct type
*
14082 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14084 struct objfile
*objfile
= cu
->objfile
;
14085 const char *previous_prefix
, *name
;
14089 /* For extensions, reuse the type of the original namespace. */
14090 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
14092 struct die_info
*ext_die
;
14093 struct dwarf2_cu
*ext_cu
= cu
;
14095 ext_die
= dwarf2_extension (die
, &ext_cu
);
14096 type
= read_type_die (ext_die
, ext_cu
);
14098 /* EXT_CU may not be the same as CU.
14099 Ensure TYPE is recorded with CU in die_type_hash. */
14100 return set_die_type (die
, type
, cu
);
14103 name
= namespace_name (die
, &is_anonymous
, cu
);
14105 /* Now build the name of the current namespace. */
14107 previous_prefix
= determine_prefix (die
, cu
);
14108 if (previous_prefix
[0] != '\0')
14109 name
= typename_concat (&objfile
->objfile_obstack
,
14110 previous_prefix
, name
, 0, cu
);
14112 /* Create the type. */
14113 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
14115 TYPE_NAME (type
) = name
;
14116 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
14118 return set_die_type (die
, type
, cu
);
14121 /* Read a namespace scope. */
14124 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
14126 struct objfile
*objfile
= cu
->objfile
;
14129 /* Add a symbol associated to this if we haven't seen the namespace
14130 before. Also, add a using directive if it's an anonymous
14133 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
14137 type
= read_type_die (die
, cu
);
14138 new_symbol (die
, type
, cu
);
14140 namespace_name (die
, &is_anonymous
, cu
);
14143 const char *previous_prefix
= determine_prefix (die
, cu
);
14145 add_using_directive (using_directives (cu
->language
),
14146 previous_prefix
, TYPE_NAME (type
), NULL
,
14147 NULL
, NULL
, 0, &objfile
->objfile_obstack
);
14151 if (die
->child
!= NULL
)
14153 struct die_info
*child_die
= die
->child
;
14155 while (child_die
&& child_die
->tag
)
14157 process_die (child_die
, cu
);
14158 child_die
= sibling_die (child_die
);
14163 /* Read a Fortran module as type. This DIE can be only a declaration used for
14164 imported module. Still we need that type as local Fortran "use ... only"
14165 declaration imports depend on the created type in determine_prefix. */
14167 static struct type
*
14168 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14170 struct objfile
*objfile
= cu
->objfile
;
14171 const char *module_name
;
14174 module_name
= dwarf2_name (die
, cu
);
14176 complaint (&symfile_complaints
,
14177 _("DW_TAG_module has no name, offset 0x%x"),
14178 die
->offset
.sect_off
);
14179 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
14181 /* determine_prefix uses TYPE_TAG_NAME. */
14182 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
14184 return set_die_type (die
, type
, cu
);
14187 /* Read a Fortran module. */
14190 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
14192 struct die_info
*child_die
= die
->child
;
14195 type
= read_type_die (die
, cu
);
14196 new_symbol (die
, type
, cu
);
14198 while (child_die
&& child_die
->tag
)
14200 process_die (child_die
, cu
);
14201 child_die
= sibling_die (child_die
);
14205 /* Return the name of the namespace represented by DIE. Set
14206 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
14209 static const char *
14210 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
14212 struct die_info
*current_die
;
14213 const char *name
= NULL
;
14215 /* Loop through the extensions until we find a name. */
14217 for (current_die
= die
;
14218 current_die
!= NULL
;
14219 current_die
= dwarf2_extension (die
, &cu
))
14221 /* We don't use dwarf2_name here so that we can detect the absence
14222 of a name -> anonymous namespace. */
14223 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
14229 /* Is it an anonymous namespace? */
14231 *is_anonymous
= (name
== NULL
);
14233 name
= CP_ANONYMOUS_NAMESPACE_STR
;
14238 /* Extract all information from a DW_TAG_pointer_type DIE and add to
14239 the user defined type vector. */
14241 static struct type
*
14242 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14244 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
14245 struct comp_unit_head
*cu_header
= &cu
->header
;
14247 struct attribute
*attr_byte_size
;
14248 struct attribute
*attr_address_class
;
14249 int byte_size
, addr_class
;
14250 struct type
*target_type
;
14252 target_type
= die_type (die
, cu
);
14254 /* The die_type call above may have already set the type for this DIE. */
14255 type
= get_die_type (die
, cu
);
14259 type
= lookup_pointer_type (target_type
);
14261 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14262 if (attr_byte_size
)
14263 byte_size
= DW_UNSND (attr_byte_size
);
14265 byte_size
= cu_header
->addr_size
;
14267 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
14268 if (attr_address_class
)
14269 addr_class
= DW_UNSND (attr_address_class
);
14271 addr_class
= DW_ADDR_none
;
14273 /* If the pointer size or address class is different than the
14274 default, create a type variant marked as such and set the
14275 length accordingly. */
14276 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
14278 if (gdbarch_address_class_type_flags_p (gdbarch
))
14282 type_flags
= gdbarch_address_class_type_flags
14283 (gdbarch
, byte_size
, addr_class
);
14284 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
14286 type
= make_type_with_address_space (type
, type_flags
);
14288 else if (TYPE_LENGTH (type
) != byte_size
)
14290 complaint (&symfile_complaints
,
14291 _("invalid pointer size %d"), byte_size
);
14295 /* Should we also complain about unhandled address classes? */
14299 TYPE_LENGTH (type
) = byte_size
;
14300 return set_die_type (die
, type
, cu
);
14303 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
14304 the user defined type vector. */
14306 static struct type
*
14307 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14310 struct type
*to_type
;
14311 struct type
*domain
;
14313 to_type
= die_type (die
, cu
);
14314 domain
= die_containing_type (die
, cu
);
14316 /* The calls above may have already set the type for this DIE. */
14317 type
= get_die_type (die
, cu
);
14321 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
14322 type
= lookup_methodptr_type (to_type
);
14323 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
14325 struct type
*new_type
= alloc_type (cu
->objfile
);
14327 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
14328 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
14329 TYPE_VARARGS (to_type
));
14330 type
= lookup_methodptr_type (new_type
);
14333 type
= lookup_memberptr_type (to_type
, domain
);
14335 return set_die_type (die
, type
, cu
);
14338 /* Extract all information from a DW_TAG_reference_type DIE and add to
14339 the user defined type vector. */
14341 static struct type
*
14342 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14344 struct comp_unit_head
*cu_header
= &cu
->header
;
14345 struct type
*type
, *target_type
;
14346 struct attribute
*attr
;
14348 target_type
= die_type (die
, cu
);
14350 /* The die_type call above may have already set the type for this DIE. */
14351 type
= get_die_type (die
, cu
);
14355 type
= lookup_reference_type (target_type
);
14356 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14359 TYPE_LENGTH (type
) = DW_UNSND (attr
);
14363 TYPE_LENGTH (type
) = cu_header
->addr_size
;
14365 return set_die_type (die
, type
, cu
);
14368 /* Add the given cv-qualifiers to the element type of the array. GCC
14369 outputs DWARF type qualifiers that apply to an array, not the
14370 element type. But GDB relies on the array element type to carry
14371 the cv-qualifiers. This mimics section 6.7.3 of the C99
14374 static struct type
*
14375 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
14376 struct type
*base_type
, int cnst
, int voltl
)
14378 struct type
*el_type
, *inner_array
;
14380 base_type
= copy_type (base_type
);
14381 inner_array
= base_type
;
14383 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
14385 TYPE_TARGET_TYPE (inner_array
) =
14386 copy_type (TYPE_TARGET_TYPE (inner_array
));
14387 inner_array
= TYPE_TARGET_TYPE (inner_array
);
14390 el_type
= TYPE_TARGET_TYPE (inner_array
);
14391 cnst
|= TYPE_CONST (el_type
);
14392 voltl
|= TYPE_VOLATILE (el_type
);
14393 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
14395 return set_die_type (die
, base_type
, cu
);
14398 static struct type
*
14399 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14401 struct type
*base_type
, *cv_type
;
14403 base_type
= die_type (die
, cu
);
14405 /* The die_type call above may have already set the type for this DIE. */
14406 cv_type
= get_die_type (die
, cu
);
14410 /* In case the const qualifier is applied to an array type, the element type
14411 is so qualified, not the array type (section 6.7.3 of C99). */
14412 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14413 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
14415 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
14416 return set_die_type (die
, cv_type
, cu
);
14419 static struct type
*
14420 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14422 struct type
*base_type
, *cv_type
;
14424 base_type
= die_type (die
, cu
);
14426 /* The die_type call above may have already set the type for this DIE. */
14427 cv_type
= get_die_type (die
, cu
);
14431 /* In case the volatile qualifier is applied to an array type, the
14432 element type is so qualified, not the array type (section 6.7.3
14434 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14435 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
14437 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
14438 return set_die_type (die
, cv_type
, cu
);
14441 /* Handle DW_TAG_restrict_type. */
14443 static struct type
*
14444 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14446 struct type
*base_type
, *cv_type
;
14448 base_type
= die_type (die
, cu
);
14450 /* The die_type call above may have already set the type for this DIE. */
14451 cv_type
= get_die_type (die
, cu
);
14455 cv_type
= make_restrict_type (base_type
);
14456 return set_die_type (die
, cv_type
, cu
);
14459 /* Handle DW_TAG_atomic_type. */
14461 static struct type
*
14462 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14464 struct type
*base_type
, *cv_type
;
14466 base_type
= die_type (die
, cu
);
14468 /* The die_type call above may have already set the type for this DIE. */
14469 cv_type
= get_die_type (die
, cu
);
14473 cv_type
= make_atomic_type (base_type
);
14474 return set_die_type (die
, cv_type
, cu
);
14477 /* Extract all information from a DW_TAG_string_type DIE and add to
14478 the user defined type vector. It isn't really a user defined type,
14479 but it behaves like one, with other DIE's using an AT_user_def_type
14480 attribute to reference it. */
14482 static struct type
*
14483 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14485 struct objfile
*objfile
= cu
->objfile
;
14486 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14487 struct type
*type
, *range_type
, *index_type
, *char_type
;
14488 struct attribute
*attr
;
14489 unsigned int length
;
14491 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
14494 length
= DW_UNSND (attr
);
14498 /* Check for the DW_AT_byte_size attribute. */
14499 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14502 length
= DW_UNSND (attr
);
14510 index_type
= objfile_type (objfile
)->builtin_int
;
14511 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
14512 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
14513 type
= create_string_type (NULL
, char_type
, range_type
);
14515 return set_die_type (die
, type
, cu
);
14518 /* Assuming that DIE corresponds to a function, returns nonzero
14519 if the function is prototyped. */
14522 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
14524 struct attribute
*attr
;
14526 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
14527 if (attr
&& (DW_UNSND (attr
) != 0))
14530 /* The DWARF standard implies that the DW_AT_prototyped attribute
14531 is only meaninful for C, but the concept also extends to other
14532 languages that allow unprototyped functions (Eg: Objective C).
14533 For all other languages, assume that functions are always
14535 if (cu
->language
!= language_c
14536 && cu
->language
!= language_objc
14537 && cu
->language
!= language_opencl
)
14540 /* RealView does not emit DW_AT_prototyped. We can not distinguish
14541 prototyped and unprototyped functions; default to prototyped,
14542 since that is more common in modern code (and RealView warns
14543 about unprototyped functions). */
14544 if (producer_is_realview (cu
->producer
))
14550 /* Handle DIES due to C code like:
14554 int (*funcp)(int a, long l);
14558 ('funcp' generates a DW_TAG_subroutine_type DIE). */
14560 static struct type
*
14561 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14563 struct objfile
*objfile
= cu
->objfile
;
14564 struct type
*type
; /* Type that this function returns. */
14565 struct type
*ftype
; /* Function that returns above type. */
14566 struct attribute
*attr
;
14568 type
= die_type (die
, cu
);
14570 /* The die_type call above may have already set the type for this DIE. */
14571 ftype
= get_die_type (die
, cu
);
14575 ftype
= lookup_function_type (type
);
14577 if (prototyped_function_p (die
, cu
))
14578 TYPE_PROTOTYPED (ftype
) = 1;
14580 /* Store the calling convention in the type if it's available in
14581 the subroutine die. Otherwise set the calling convention to
14582 the default value DW_CC_normal. */
14583 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
14585 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
14586 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
14587 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
14589 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
14591 /* Record whether the function returns normally to its caller or not
14592 if the DWARF producer set that information. */
14593 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
14594 if (attr
&& (DW_UNSND (attr
) != 0))
14595 TYPE_NO_RETURN (ftype
) = 1;
14597 /* We need to add the subroutine type to the die immediately so
14598 we don't infinitely recurse when dealing with parameters
14599 declared as the same subroutine type. */
14600 set_die_type (die
, ftype
, cu
);
14602 if (die
->child
!= NULL
)
14604 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
14605 struct die_info
*child_die
;
14606 int nparams
, iparams
;
14608 /* Count the number of parameters.
14609 FIXME: GDB currently ignores vararg functions, but knows about
14610 vararg member functions. */
14612 child_die
= die
->child
;
14613 while (child_die
&& child_die
->tag
)
14615 if (child_die
->tag
== DW_TAG_formal_parameter
)
14617 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
14618 TYPE_VARARGS (ftype
) = 1;
14619 child_die
= sibling_die (child_die
);
14622 /* Allocate storage for parameters and fill them in. */
14623 TYPE_NFIELDS (ftype
) = nparams
;
14624 TYPE_FIELDS (ftype
) = (struct field
*)
14625 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
14627 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
14628 even if we error out during the parameters reading below. */
14629 for (iparams
= 0; iparams
< nparams
; iparams
++)
14630 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
14633 child_die
= die
->child
;
14634 while (child_die
&& child_die
->tag
)
14636 if (child_die
->tag
== DW_TAG_formal_parameter
)
14638 struct type
*arg_type
;
14640 /* DWARF version 2 has no clean way to discern C++
14641 static and non-static member functions. G++ helps
14642 GDB by marking the first parameter for non-static
14643 member functions (which is the this pointer) as
14644 artificial. We pass this information to
14645 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
14647 DWARF version 3 added DW_AT_object_pointer, which GCC
14648 4.5 does not yet generate. */
14649 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
14651 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
14654 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
14656 /* GCC/43521: In java, the formal parameter
14657 "this" is sometimes not marked with DW_AT_artificial. */
14658 if (cu
->language
== language_java
)
14660 const char *name
= dwarf2_name (child_die
, cu
);
14662 if (name
&& !strcmp (name
, "this"))
14663 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
14666 arg_type
= die_type (child_die
, cu
);
14668 /* RealView does not mark THIS as const, which the testsuite
14669 expects. GCC marks THIS as const in method definitions,
14670 but not in the class specifications (GCC PR 43053). */
14671 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
14672 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
14675 struct dwarf2_cu
*arg_cu
= cu
;
14676 const char *name
= dwarf2_name (child_die
, cu
);
14678 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
14681 /* If the compiler emits this, use it. */
14682 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
14685 else if (name
&& strcmp (name
, "this") == 0)
14686 /* Function definitions will have the argument names. */
14688 else if (name
== NULL
&& iparams
== 0)
14689 /* Declarations may not have the names, so like
14690 elsewhere in GDB, assume an artificial first
14691 argument is "this". */
14695 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
14699 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
14702 child_die
= sibling_die (child_die
);
14709 static struct type
*
14710 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
14712 struct objfile
*objfile
= cu
->objfile
;
14713 const char *name
= NULL
;
14714 struct type
*this_type
, *target_type
;
14716 name
= dwarf2_full_name (NULL
, die
, cu
);
14717 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
14718 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
14719 TYPE_NAME (this_type
) = name
;
14720 set_die_type (die
, this_type
, cu
);
14721 target_type
= die_type (die
, cu
);
14722 if (target_type
!= this_type
)
14723 TYPE_TARGET_TYPE (this_type
) = target_type
;
14726 /* Self-referential typedefs are, it seems, not allowed by the DWARF
14727 spec and cause infinite loops in GDB. */
14728 complaint (&symfile_complaints
,
14729 _("Self-referential DW_TAG_typedef "
14730 "- DIE at 0x%x [in module %s]"),
14731 die
->offset
.sect_off
, objfile_name (objfile
));
14732 TYPE_TARGET_TYPE (this_type
) = NULL
;
14737 /* Find a representation of a given base type and install
14738 it in the TYPE field of the die. */
14740 static struct type
*
14741 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14743 struct objfile
*objfile
= cu
->objfile
;
14745 struct attribute
*attr
;
14746 int encoding
= 0, size
= 0;
14748 enum type_code code
= TYPE_CODE_INT
;
14749 int type_flags
= 0;
14750 struct type
*target_type
= NULL
;
14752 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
14755 encoding
= DW_UNSND (attr
);
14757 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14760 size
= DW_UNSND (attr
);
14762 name
= dwarf2_name (die
, cu
);
14765 complaint (&symfile_complaints
,
14766 _("DW_AT_name missing from DW_TAG_base_type"));
14771 case DW_ATE_address
:
14772 /* Turn DW_ATE_address into a void * pointer. */
14773 code
= TYPE_CODE_PTR
;
14774 type_flags
|= TYPE_FLAG_UNSIGNED
;
14775 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
14777 case DW_ATE_boolean
:
14778 code
= TYPE_CODE_BOOL
;
14779 type_flags
|= TYPE_FLAG_UNSIGNED
;
14781 case DW_ATE_complex_float
:
14782 code
= TYPE_CODE_COMPLEX
;
14783 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
14785 case DW_ATE_decimal_float
:
14786 code
= TYPE_CODE_DECFLOAT
;
14789 code
= TYPE_CODE_FLT
;
14791 case DW_ATE_signed
:
14793 case DW_ATE_unsigned
:
14794 type_flags
|= TYPE_FLAG_UNSIGNED
;
14795 if (cu
->language
== language_fortran
14797 && startswith (name
, "character("))
14798 code
= TYPE_CODE_CHAR
;
14800 case DW_ATE_signed_char
:
14801 if (cu
->language
== language_ada
|| cu
->language
== language_m2
14802 || cu
->language
== language_pascal
14803 || cu
->language
== language_fortran
)
14804 code
= TYPE_CODE_CHAR
;
14806 case DW_ATE_unsigned_char
:
14807 if (cu
->language
== language_ada
|| cu
->language
== language_m2
14808 || cu
->language
== language_pascal
14809 || cu
->language
== language_fortran
)
14810 code
= TYPE_CODE_CHAR
;
14811 type_flags
|= TYPE_FLAG_UNSIGNED
;
14814 /* We just treat this as an integer and then recognize the
14815 type by name elsewhere. */
14819 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
14820 dwarf_type_encoding_name (encoding
));
14824 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
14825 TYPE_NAME (type
) = name
;
14826 TYPE_TARGET_TYPE (type
) = target_type
;
14828 if (name
&& strcmp (name
, "char") == 0)
14829 TYPE_NOSIGN (type
) = 1;
14831 return set_die_type (die
, type
, cu
);
14834 /* Parse dwarf attribute if it's a block, reference or constant and put the
14835 resulting value of the attribute into struct bound_prop.
14836 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
14839 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
14840 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
)
14842 struct dwarf2_property_baton
*baton
;
14843 struct obstack
*obstack
= &cu
->objfile
->objfile_obstack
;
14845 if (attr
== NULL
|| prop
== NULL
)
14848 if (attr_form_is_block (attr
))
14850 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
14851 baton
->referenced_type
= NULL
;
14852 baton
->locexpr
.per_cu
= cu
->per_cu
;
14853 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
14854 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
14855 prop
->data
.baton
= baton
;
14856 prop
->kind
= PROP_LOCEXPR
;
14857 gdb_assert (prop
->data
.baton
!= NULL
);
14859 else if (attr_form_is_ref (attr
))
14861 struct dwarf2_cu
*target_cu
= cu
;
14862 struct die_info
*target_die
;
14863 struct attribute
*target_attr
;
14865 target_die
= follow_die_ref (die
, attr
, &target_cu
);
14866 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
14867 if (target_attr
== NULL
)
14868 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
14870 if (target_attr
== NULL
)
14873 switch (target_attr
->name
)
14875 case DW_AT_location
:
14876 if (attr_form_is_section_offset (target_attr
))
14878 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
14879 baton
->referenced_type
= die_type (target_die
, target_cu
);
14880 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
14881 prop
->data
.baton
= baton
;
14882 prop
->kind
= PROP_LOCLIST
;
14883 gdb_assert (prop
->data
.baton
!= NULL
);
14885 else if (attr_form_is_block (target_attr
))
14887 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
14888 baton
->referenced_type
= die_type (target_die
, target_cu
);
14889 baton
->locexpr
.per_cu
= cu
->per_cu
;
14890 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
14891 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
14892 prop
->data
.baton
= baton
;
14893 prop
->kind
= PROP_LOCEXPR
;
14894 gdb_assert (prop
->data
.baton
!= NULL
);
14898 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
14899 "dynamic property");
14903 case DW_AT_data_member_location
:
14907 if (!handle_data_member_location (target_die
, target_cu
,
14911 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
14912 baton
->referenced_type
= read_type_die (target_die
->parent
,
14914 baton
->offset_info
.offset
= offset
;
14915 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
14916 prop
->data
.baton
= baton
;
14917 prop
->kind
= PROP_ADDR_OFFSET
;
14922 else if (attr_form_is_constant (attr
))
14924 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
14925 prop
->kind
= PROP_CONST
;
14929 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
14930 dwarf2_name (die
, cu
));
14937 /* Read the given DW_AT_subrange DIE. */
14939 static struct type
*
14940 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14942 struct type
*base_type
, *orig_base_type
;
14943 struct type
*range_type
;
14944 struct attribute
*attr
;
14945 struct dynamic_prop low
, high
;
14946 int low_default_is_valid
;
14947 int high_bound_is_count
= 0;
14949 LONGEST negative_mask
;
14951 orig_base_type
= die_type (die
, cu
);
14952 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
14953 whereas the real type might be. So, we use ORIG_BASE_TYPE when
14954 creating the range type, but we use the result of check_typedef
14955 when examining properties of the type. */
14956 base_type
= check_typedef (orig_base_type
);
14958 /* The die_type call above may have already set the type for this DIE. */
14959 range_type
= get_die_type (die
, cu
);
14963 low
.kind
= PROP_CONST
;
14964 high
.kind
= PROP_CONST
;
14965 high
.data
.const_val
= 0;
14967 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
14968 omitting DW_AT_lower_bound. */
14969 switch (cu
->language
)
14972 case language_cplus
:
14973 low
.data
.const_val
= 0;
14974 low_default_is_valid
= 1;
14976 case language_fortran
:
14977 low
.data
.const_val
= 1;
14978 low_default_is_valid
= 1;
14981 case language_java
:
14982 case language_objc
:
14983 low
.data
.const_val
= 0;
14984 low_default_is_valid
= (cu
->header
.version
>= 4);
14988 case language_pascal
:
14989 low
.data
.const_val
= 1;
14990 low_default_is_valid
= (cu
->header
.version
>= 4);
14993 low
.data
.const_val
= 0;
14994 low_default_is_valid
= 0;
14998 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
15000 attr_to_dynamic_prop (attr
, die
, cu
, &low
);
15001 else if (!low_default_is_valid
)
15002 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
15003 "- DIE at 0x%x [in module %s]"),
15004 die
->offset
.sect_off
, objfile_name (cu
->objfile
));
15006 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
15007 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
))
15009 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
15010 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
))
15012 /* If bounds are constant do the final calculation here. */
15013 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
15014 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
15016 high_bound_is_count
= 1;
15020 /* Dwarf-2 specifications explicitly allows to create subrange types
15021 without specifying a base type.
15022 In that case, the base type must be set to the type of
15023 the lower bound, upper bound or count, in that order, if any of these
15024 three attributes references an object that has a type.
15025 If no base type is found, the Dwarf-2 specifications say that
15026 a signed integer type of size equal to the size of an address should
15028 For the following C code: `extern char gdb_int [];'
15029 GCC produces an empty range DIE.
15030 FIXME: muller/2010-05-28: Possible references to object for low bound,
15031 high bound or count are not yet handled by this code. */
15032 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
15034 struct objfile
*objfile
= cu
->objfile
;
15035 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15036 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
15037 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
15039 /* Test "int", "long int", and "long long int" objfile types,
15040 and select the first one having a size above or equal to the
15041 architecture address size. */
15042 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15043 base_type
= int_type
;
15046 int_type
= objfile_type (objfile
)->builtin_long
;
15047 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15048 base_type
= int_type
;
15051 int_type
= objfile_type (objfile
)->builtin_long_long
;
15052 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15053 base_type
= int_type
;
15058 /* Normally, the DWARF producers are expected to use a signed
15059 constant form (Eg. DW_FORM_sdata) to express negative bounds.
15060 But this is unfortunately not always the case, as witnessed
15061 with GCC, for instance, where the ambiguous DW_FORM_dataN form
15062 is used instead. To work around that ambiguity, we treat
15063 the bounds as signed, and thus sign-extend their values, when
15064 the base type is signed. */
15066 -((LONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
15067 if (low
.kind
== PROP_CONST
15068 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
15069 low
.data
.const_val
|= negative_mask
;
15070 if (high
.kind
== PROP_CONST
15071 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
15072 high
.data
.const_val
|= negative_mask
;
15074 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
);
15076 if (high_bound_is_count
)
15077 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
15079 /* Ada expects an empty array on no boundary attributes. */
15080 if (attr
== NULL
&& cu
->language
!= language_ada
)
15081 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
15083 name
= dwarf2_name (die
, cu
);
15085 TYPE_NAME (range_type
) = name
;
15087 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15089 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
15091 set_die_type (die
, range_type
, cu
);
15093 /* set_die_type should be already done. */
15094 set_descriptive_type (range_type
, die
, cu
);
15099 static struct type
*
15100 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15104 /* For now, we only support the C meaning of an unspecified type: void. */
15106 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
15107 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
15109 return set_die_type (die
, type
, cu
);
15112 /* Read a single die and all its descendents. Set the die's sibling
15113 field to NULL; set other fields in the die correctly, and set all
15114 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
15115 location of the info_ptr after reading all of those dies. PARENT
15116 is the parent of the die in question. */
15118 static struct die_info
*
15119 read_die_and_children (const struct die_reader_specs
*reader
,
15120 const gdb_byte
*info_ptr
,
15121 const gdb_byte
**new_info_ptr
,
15122 struct die_info
*parent
)
15124 struct die_info
*die
;
15125 const gdb_byte
*cur_ptr
;
15128 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
15131 *new_info_ptr
= cur_ptr
;
15134 store_in_ref_table (die
, reader
->cu
);
15137 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
15141 *new_info_ptr
= cur_ptr
;
15144 die
->sibling
= NULL
;
15145 die
->parent
= parent
;
15149 /* Read a die, all of its descendents, and all of its siblings; set
15150 all of the fields of all of the dies correctly. Arguments are as
15151 in read_die_and_children. */
15153 static struct die_info
*
15154 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
15155 const gdb_byte
*info_ptr
,
15156 const gdb_byte
**new_info_ptr
,
15157 struct die_info
*parent
)
15159 struct die_info
*first_die
, *last_sibling
;
15160 const gdb_byte
*cur_ptr
;
15162 cur_ptr
= info_ptr
;
15163 first_die
= last_sibling
= NULL
;
15167 struct die_info
*die
15168 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
15172 *new_info_ptr
= cur_ptr
;
15179 last_sibling
->sibling
= die
;
15181 last_sibling
= die
;
15185 /* Read a die, all of its descendents, and all of its siblings; set
15186 all of the fields of all of the dies correctly. Arguments are as
15187 in read_die_and_children.
15188 This the main entry point for reading a DIE and all its children. */
15190 static struct die_info
*
15191 read_die_and_siblings (const struct die_reader_specs
*reader
,
15192 const gdb_byte
*info_ptr
,
15193 const gdb_byte
**new_info_ptr
,
15194 struct die_info
*parent
)
15196 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
15197 new_info_ptr
, parent
);
15199 if (dwarf_die_debug
)
15201 fprintf_unfiltered (gdb_stdlog
,
15202 "Read die from %s@0x%x of %s:\n",
15203 get_section_name (reader
->die_section
),
15204 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
15205 bfd_get_filename (reader
->abfd
));
15206 dump_die (die
, dwarf_die_debug
);
15212 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
15214 The caller is responsible for filling in the extra attributes
15215 and updating (*DIEP)->num_attrs.
15216 Set DIEP to point to a newly allocated die with its information,
15217 except for its child, sibling, and parent fields.
15218 Set HAS_CHILDREN to tell whether the die has children or not. */
15220 static const gdb_byte
*
15221 read_full_die_1 (const struct die_reader_specs
*reader
,
15222 struct die_info
**diep
, const gdb_byte
*info_ptr
,
15223 int *has_children
, int num_extra_attrs
)
15225 unsigned int abbrev_number
, bytes_read
, i
;
15226 sect_offset offset
;
15227 struct abbrev_info
*abbrev
;
15228 struct die_info
*die
;
15229 struct dwarf2_cu
*cu
= reader
->cu
;
15230 bfd
*abfd
= reader
->abfd
;
15232 offset
.sect_off
= info_ptr
- reader
->buffer
;
15233 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
15234 info_ptr
+= bytes_read
;
15235 if (!abbrev_number
)
15242 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
15244 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
15246 bfd_get_filename (abfd
));
15248 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
15249 die
->offset
= offset
;
15250 die
->tag
= abbrev
->tag
;
15251 die
->abbrev
= abbrev_number
;
15253 /* Make the result usable.
15254 The caller needs to update num_attrs after adding the extra
15256 die
->num_attrs
= abbrev
->num_attrs
;
15258 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
15259 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
15263 *has_children
= abbrev
->has_children
;
15267 /* Read a die and all its attributes.
15268 Set DIEP to point to a newly allocated die with its information,
15269 except for its child, sibling, and parent fields.
15270 Set HAS_CHILDREN to tell whether the die has children or not. */
15272 static const gdb_byte
*
15273 read_full_die (const struct die_reader_specs
*reader
,
15274 struct die_info
**diep
, const gdb_byte
*info_ptr
,
15277 const gdb_byte
*result
;
15279 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
15281 if (dwarf_die_debug
)
15283 fprintf_unfiltered (gdb_stdlog
,
15284 "Read die from %s@0x%x of %s:\n",
15285 get_section_name (reader
->die_section
),
15286 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
15287 bfd_get_filename (reader
->abfd
));
15288 dump_die (*diep
, dwarf_die_debug
);
15294 /* Abbreviation tables.
15296 In DWARF version 2, the description of the debugging information is
15297 stored in a separate .debug_abbrev section. Before we read any
15298 dies from a section we read in all abbreviations and install them
15299 in a hash table. */
15301 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
15303 static struct abbrev_info
*
15304 abbrev_table_alloc_abbrev (struct abbrev_table
*abbrev_table
)
15306 struct abbrev_info
*abbrev
;
15308 abbrev
= XOBNEW (&abbrev_table
->abbrev_obstack
, struct abbrev_info
);
15309 memset (abbrev
, 0, sizeof (struct abbrev_info
));
15314 /* Add an abbreviation to the table. */
15317 abbrev_table_add_abbrev (struct abbrev_table
*abbrev_table
,
15318 unsigned int abbrev_number
,
15319 struct abbrev_info
*abbrev
)
15321 unsigned int hash_number
;
15323 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15324 abbrev
->next
= abbrev_table
->abbrevs
[hash_number
];
15325 abbrev_table
->abbrevs
[hash_number
] = abbrev
;
15328 /* Look up an abbrev in the table.
15329 Returns NULL if the abbrev is not found. */
15331 static struct abbrev_info
*
15332 abbrev_table_lookup_abbrev (const struct abbrev_table
*abbrev_table
,
15333 unsigned int abbrev_number
)
15335 unsigned int hash_number
;
15336 struct abbrev_info
*abbrev
;
15338 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15339 abbrev
= abbrev_table
->abbrevs
[hash_number
];
15343 if (abbrev
->number
== abbrev_number
)
15345 abbrev
= abbrev
->next
;
15350 /* Read in an abbrev table. */
15352 static struct abbrev_table
*
15353 abbrev_table_read_table (struct dwarf2_section_info
*section
,
15354 sect_offset offset
)
15356 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
15357 bfd
*abfd
= get_section_bfd_owner (section
);
15358 struct abbrev_table
*abbrev_table
;
15359 const gdb_byte
*abbrev_ptr
;
15360 struct abbrev_info
*cur_abbrev
;
15361 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
15362 unsigned int abbrev_form
;
15363 struct attr_abbrev
*cur_attrs
;
15364 unsigned int allocated_attrs
;
15366 abbrev_table
= XNEW (struct abbrev_table
);
15367 abbrev_table
->offset
= offset
;
15368 obstack_init (&abbrev_table
->abbrev_obstack
);
15369 abbrev_table
->abbrevs
=
15370 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct abbrev_info
*,
15372 memset (abbrev_table
->abbrevs
, 0,
15373 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
15375 dwarf2_read_section (objfile
, section
);
15376 abbrev_ptr
= section
->buffer
+ offset
.sect_off
;
15377 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15378 abbrev_ptr
+= bytes_read
;
15380 allocated_attrs
= ATTR_ALLOC_CHUNK
;
15381 cur_attrs
= XNEWVEC (struct attr_abbrev
, allocated_attrs
);
15383 /* Loop until we reach an abbrev number of 0. */
15384 while (abbrev_number
)
15386 cur_abbrev
= abbrev_table_alloc_abbrev (abbrev_table
);
15388 /* read in abbrev header */
15389 cur_abbrev
->number
= abbrev_number
;
15391 = (enum dwarf_tag
) read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15392 abbrev_ptr
+= bytes_read
;
15393 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
15396 /* now read in declarations */
15397 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15398 abbrev_ptr
+= bytes_read
;
15399 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15400 abbrev_ptr
+= bytes_read
;
15401 while (abbrev_name
)
15403 if (cur_abbrev
->num_attrs
== allocated_attrs
)
15405 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
15407 = XRESIZEVEC (struct attr_abbrev
, cur_attrs
, allocated_attrs
);
15410 cur_attrs
[cur_abbrev
->num_attrs
].name
15411 = (enum dwarf_attribute
) abbrev_name
;
15412 cur_attrs
[cur_abbrev
->num_attrs
++].form
15413 = (enum dwarf_form
) abbrev_form
;
15414 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15415 abbrev_ptr
+= bytes_read
;
15416 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15417 abbrev_ptr
+= bytes_read
;
15420 cur_abbrev
->attrs
=
15421 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct attr_abbrev
,
15422 cur_abbrev
->num_attrs
);
15423 memcpy (cur_abbrev
->attrs
, cur_attrs
,
15424 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
15426 abbrev_table_add_abbrev (abbrev_table
, abbrev_number
, cur_abbrev
);
15428 /* Get next abbreviation.
15429 Under Irix6 the abbreviations for a compilation unit are not
15430 always properly terminated with an abbrev number of 0.
15431 Exit loop if we encounter an abbreviation which we have
15432 already read (which means we are about to read the abbreviations
15433 for the next compile unit) or if the end of the abbreviation
15434 table is reached. */
15435 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
15437 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15438 abbrev_ptr
+= bytes_read
;
15439 if (abbrev_table_lookup_abbrev (abbrev_table
, abbrev_number
) != NULL
)
15444 return abbrev_table
;
15447 /* Free the resources held by ABBREV_TABLE. */
15450 abbrev_table_free (struct abbrev_table
*abbrev_table
)
15452 obstack_free (&abbrev_table
->abbrev_obstack
, NULL
);
15453 xfree (abbrev_table
);
15456 /* Same as abbrev_table_free but as a cleanup.
15457 We pass in a pointer to the pointer to the table so that we can
15458 set the pointer to NULL when we're done. It also simplifies
15459 build_type_psymtabs_1. */
15462 abbrev_table_free_cleanup (void *table_ptr
)
15464 struct abbrev_table
**abbrev_table_ptr
= (struct abbrev_table
**) table_ptr
;
15466 if (*abbrev_table_ptr
!= NULL
)
15467 abbrev_table_free (*abbrev_table_ptr
);
15468 *abbrev_table_ptr
= NULL
;
15471 /* Read the abbrev table for CU from ABBREV_SECTION. */
15474 dwarf2_read_abbrevs (struct dwarf2_cu
*cu
,
15475 struct dwarf2_section_info
*abbrev_section
)
15478 abbrev_table_read_table (abbrev_section
, cu
->header
.abbrev_offset
);
15481 /* Release the memory used by the abbrev table for a compilation unit. */
15484 dwarf2_free_abbrev_table (void *ptr_to_cu
)
15486 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr_to_cu
;
15488 if (cu
->abbrev_table
!= NULL
)
15489 abbrev_table_free (cu
->abbrev_table
);
15490 /* Set this to NULL so that we SEGV if we try to read it later,
15491 and also because free_comp_unit verifies this is NULL. */
15492 cu
->abbrev_table
= NULL
;
15495 /* Returns nonzero if TAG represents a type that we might generate a partial
15499 is_type_tag_for_partial (int tag
)
15504 /* Some types that would be reasonable to generate partial symbols for,
15505 that we don't at present. */
15506 case DW_TAG_array_type
:
15507 case DW_TAG_file_type
:
15508 case DW_TAG_ptr_to_member_type
:
15509 case DW_TAG_set_type
:
15510 case DW_TAG_string_type
:
15511 case DW_TAG_subroutine_type
:
15513 case DW_TAG_base_type
:
15514 case DW_TAG_class_type
:
15515 case DW_TAG_interface_type
:
15516 case DW_TAG_enumeration_type
:
15517 case DW_TAG_structure_type
:
15518 case DW_TAG_subrange_type
:
15519 case DW_TAG_typedef
:
15520 case DW_TAG_union_type
:
15527 /* Load all DIEs that are interesting for partial symbols into memory. */
15529 static struct partial_die_info
*
15530 load_partial_dies (const struct die_reader_specs
*reader
,
15531 const gdb_byte
*info_ptr
, int building_psymtab
)
15533 struct dwarf2_cu
*cu
= reader
->cu
;
15534 struct objfile
*objfile
= cu
->objfile
;
15535 struct partial_die_info
*part_die
;
15536 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
15537 struct abbrev_info
*abbrev
;
15538 unsigned int bytes_read
;
15539 unsigned int load_all
= 0;
15540 int nesting_level
= 1;
15545 gdb_assert (cu
->per_cu
!= NULL
);
15546 if (cu
->per_cu
->load_all_dies
)
15550 = htab_create_alloc_ex (cu
->header
.length
/ 12,
15554 &cu
->comp_unit_obstack
,
15555 hashtab_obstack_allocate
,
15556 dummy_obstack_deallocate
);
15558 part_die
= XOBNEW (&cu
->comp_unit_obstack
, struct partial_die_info
);
15562 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
15564 /* A NULL abbrev means the end of a series of children. */
15565 if (abbrev
== NULL
)
15567 if (--nesting_level
== 0)
15569 /* PART_DIE was probably the last thing allocated on the
15570 comp_unit_obstack, so we could call obstack_free
15571 here. We don't do that because the waste is small,
15572 and will be cleaned up when we're done with this
15573 compilation unit. This way, we're also more robust
15574 against other users of the comp_unit_obstack. */
15577 info_ptr
+= bytes_read
;
15578 last_die
= parent_die
;
15579 parent_die
= parent_die
->die_parent
;
15583 /* Check for template arguments. We never save these; if
15584 they're seen, we just mark the parent, and go on our way. */
15585 if (parent_die
!= NULL
15586 && cu
->language
== language_cplus
15587 && (abbrev
->tag
== DW_TAG_template_type_param
15588 || abbrev
->tag
== DW_TAG_template_value_param
))
15590 parent_die
->has_template_arguments
= 1;
15594 /* We don't need a partial DIE for the template argument. */
15595 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15600 /* We only recurse into c++ subprograms looking for template arguments.
15601 Skip their other children. */
15603 && cu
->language
== language_cplus
15604 && parent_die
!= NULL
15605 && parent_die
->tag
== DW_TAG_subprogram
)
15607 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15611 /* Check whether this DIE is interesting enough to save. Normally
15612 we would not be interested in members here, but there may be
15613 later variables referencing them via DW_AT_specification (for
15614 static members). */
15616 && !is_type_tag_for_partial (abbrev
->tag
)
15617 && abbrev
->tag
!= DW_TAG_constant
15618 && abbrev
->tag
!= DW_TAG_enumerator
15619 && abbrev
->tag
!= DW_TAG_subprogram
15620 && abbrev
->tag
!= DW_TAG_lexical_block
15621 && abbrev
->tag
!= DW_TAG_variable
15622 && abbrev
->tag
!= DW_TAG_namespace
15623 && abbrev
->tag
!= DW_TAG_module
15624 && abbrev
->tag
!= DW_TAG_member
15625 && abbrev
->tag
!= DW_TAG_imported_unit
15626 && abbrev
->tag
!= DW_TAG_imported_declaration
)
15628 /* Otherwise we skip to the next sibling, if any. */
15629 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15633 info_ptr
= read_partial_die (reader
, part_die
, abbrev
, bytes_read
,
15636 /* This two-pass algorithm for processing partial symbols has a
15637 high cost in cache pressure. Thus, handle some simple cases
15638 here which cover the majority of C partial symbols. DIEs
15639 which neither have specification tags in them, nor could have
15640 specification tags elsewhere pointing at them, can simply be
15641 processed and discarded.
15643 This segment is also optional; scan_partial_symbols and
15644 add_partial_symbol will handle these DIEs if we chain
15645 them in normally. When compilers which do not emit large
15646 quantities of duplicate debug information are more common,
15647 this code can probably be removed. */
15649 /* Any complete simple types at the top level (pretty much all
15650 of them, for a language without namespaces), can be processed
15652 if (parent_die
== NULL
15653 && part_die
->has_specification
== 0
15654 && part_die
->is_declaration
== 0
15655 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
15656 || part_die
->tag
== DW_TAG_base_type
15657 || part_die
->tag
== DW_TAG_subrange_type
))
15659 if (building_psymtab
&& part_die
->name
!= NULL
)
15660 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
15661 VAR_DOMAIN
, LOC_TYPEDEF
,
15662 &objfile
->static_psymbols
,
15663 0, cu
->language
, objfile
);
15664 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
15668 /* The exception for DW_TAG_typedef with has_children above is
15669 a workaround of GCC PR debug/47510. In the case of this complaint
15670 type_name_no_tag_or_error will error on such types later.
15672 GDB skipped children of DW_TAG_typedef by the shortcut above and then
15673 it could not find the child DIEs referenced later, this is checked
15674 above. In correct DWARF DW_TAG_typedef should have no children. */
15676 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
15677 complaint (&symfile_complaints
,
15678 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
15679 "- DIE at 0x%x [in module %s]"),
15680 part_die
->offset
.sect_off
, objfile_name (objfile
));
15682 /* If we're at the second level, and we're an enumerator, and
15683 our parent has no specification (meaning possibly lives in a
15684 namespace elsewhere), then we can add the partial symbol now
15685 instead of queueing it. */
15686 if (part_die
->tag
== DW_TAG_enumerator
15687 && parent_die
!= NULL
15688 && parent_die
->die_parent
== NULL
15689 && parent_die
->tag
== DW_TAG_enumeration_type
15690 && parent_die
->has_specification
== 0)
15692 if (part_die
->name
== NULL
)
15693 complaint (&symfile_complaints
,
15694 _("malformed enumerator DIE ignored"));
15695 else if (building_psymtab
)
15696 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
15697 VAR_DOMAIN
, LOC_CONST
,
15698 (cu
->language
== language_cplus
15699 || cu
->language
== language_java
)
15700 ? &objfile
->global_psymbols
15701 : &objfile
->static_psymbols
,
15702 0, cu
->language
, objfile
);
15704 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
15708 /* We'll save this DIE so link it in. */
15709 part_die
->die_parent
= parent_die
;
15710 part_die
->die_sibling
= NULL
;
15711 part_die
->die_child
= NULL
;
15713 if (last_die
&& last_die
== parent_die
)
15714 last_die
->die_child
= part_die
;
15716 last_die
->die_sibling
= part_die
;
15718 last_die
= part_die
;
15720 if (first_die
== NULL
)
15721 first_die
= part_die
;
15723 /* Maybe add the DIE to the hash table. Not all DIEs that we
15724 find interesting need to be in the hash table, because we
15725 also have the parent/sibling/child chains; only those that we
15726 might refer to by offset later during partial symbol reading.
15728 For now this means things that might have be the target of a
15729 DW_AT_specification, DW_AT_abstract_origin, or
15730 DW_AT_extension. DW_AT_extension will refer only to
15731 namespaces; DW_AT_abstract_origin refers to functions (and
15732 many things under the function DIE, but we do not recurse
15733 into function DIEs during partial symbol reading) and
15734 possibly variables as well; DW_AT_specification refers to
15735 declarations. Declarations ought to have the DW_AT_declaration
15736 flag. It happens that GCC forgets to put it in sometimes, but
15737 only for functions, not for types.
15739 Adding more things than necessary to the hash table is harmless
15740 except for the performance cost. Adding too few will result in
15741 wasted time in find_partial_die, when we reread the compilation
15742 unit with load_all_dies set. */
15745 || abbrev
->tag
== DW_TAG_constant
15746 || abbrev
->tag
== DW_TAG_subprogram
15747 || abbrev
->tag
== DW_TAG_variable
15748 || abbrev
->tag
== DW_TAG_namespace
15749 || part_die
->is_declaration
)
15753 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
15754 part_die
->offset
.sect_off
, INSERT
);
15758 part_die
= XOBNEW (&cu
->comp_unit_obstack
, struct partial_die_info
);
15760 /* For some DIEs we want to follow their children (if any). For C
15761 we have no reason to follow the children of structures; for other
15762 languages we have to, so that we can get at method physnames
15763 to infer fully qualified class names, for DW_AT_specification,
15764 and for C++ template arguments. For C++, we also look one level
15765 inside functions to find template arguments (if the name of the
15766 function does not already contain the template arguments).
15768 For Ada, we need to scan the children of subprograms and lexical
15769 blocks as well because Ada allows the definition of nested
15770 entities that could be interesting for the debugger, such as
15771 nested subprograms for instance. */
15772 if (last_die
->has_children
15774 || last_die
->tag
== DW_TAG_namespace
15775 || last_die
->tag
== DW_TAG_module
15776 || last_die
->tag
== DW_TAG_enumeration_type
15777 || (cu
->language
== language_cplus
15778 && last_die
->tag
== DW_TAG_subprogram
15779 && (last_die
->name
== NULL
15780 || strchr (last_die
->name
, '<') == NULL
))
15781 || (cu
->language
!= language_c
15782 && (last_die
->tag
== DW_TAG_class_type
15783 || last_die
->tag
== DW_TAG_interface_type
15784 || last_die
->tag
== DW_TAG_structure_type
15785 || last_die
->tag
== DW_TAG_union_type
))
15786 || (cu
->language
== language_ada
15787 && (last_die
->tag
== DW_TAG_subprogram
15788 || last_die
->tag
== DW_TAG_lexical_block
))))
15791 parent_die
= last_die
;
15795 /* Otherwise we skip to the next sibling, if any. */
15796 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
15798 /* Back to the top, do it again. */
15802 /* Read a minimal amount of information into the minimal die structure. */
15804 static const gdb_byte
*
15805 read_partial_die (const struct die_reader_specs
*reader
,
15806 struct partial_die_info
*part_die
,
15807 struct abbrev_info
*abbrev
, unsigned int abbrev_len
,
15808 const gdb_byte
*info_ptr
)
15810 struct dwarf2_cu
*cu
= reader
->cu
;
15811 struct objfile
*objfile
= cu
->objfile
;
15812 const gdb_byte
*buffer
= reader
->buffer
;
15814 struct attribute attr
;
15815 int has_low_pc_attr
= 0;
15816 int has_high_pc_attr
= 0;
15817 int high_pc_relative
= 0;
15819 memset (part_die
, 0, sizeof (struct partial_die_info
));
15821 part_die
->offset
.sect_off
= info_ptr
- buffer
;
15823 info_ptr
+= abbrev_len
;
15825 if (abbrev
== NULL
)
15828 part_die
->tag
= abbrev
->tag
;
15829 part_die
->has_children
= abbrev
->has_children
;
15831 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
15833 info_ptr
= read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
15835 /* Store the data if it is of an attribute we want to keep in a
15836 partial symbol table. */
15840 switch (part_die
->tag
)
15842 case DW_TAG_compile_unit
:
15843 case DW_TAG_partial_unit
:
15844 case DW_TAG_type_unit
:
15845 /* Compilation units have a DW_AT_name that is a filename, not
15846 a source language identifier. */
15847 case DW_TAG_enumeration_type
:
15848 case DW_TAG_enumerator
:
15849 /* These tags always have simple identifiers already; no need
15850 to canonicalize them. */
15851 part_die
->name
= DW_STRING (&attr
);
15855 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
15856 &objfile
->per_bfd
->storage_obstack
);
15860 case DW_AT_linkage_name
:
15861 case DW_AT_MIPS_linkage_name
:
15862 /* Note that both forms of linkage name might appear. We
15863 assume they will be the same, and we only store the last
15865 if (cu
->language
== language_ada
)
15866 part_die
->name
= DW_STRING (&attr
);
15867 part_die
->linkage_name
= DW_STRING (&attr
);
15870 has_low_pc_attr
= 1;
15871 part_die
->lowpc
= attr_value_as_address (&attr
);
15873 case DW_AT_high_pc
:
15874 has_high_pc_attr
= 1;
15875 part_die
->highpc
= attr_value_as_address (&attr
);
15876 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
15877 high_pc_relative
= 1;
15879 case DW_AT_location
:
15880 /* Support the .debug_loc offsets. */
15881 if (attr_form_is_block (&attr
))
15883 part_die
->d
.locdesc
= DW_BLOCK (&attr
);
15885 else if (attr_form_is_section_offset (&attr
))
15887 dwarf2_complex_location_expr_complaint ();
15891 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
15892 "partial symbol information");
15895 case DW_AT_external
:
15896 part_die
->is_external
= DW_UNSND (&attr
);
15898 case DW_AT_declaration
:
15899 part_die
->is_declaration
= DW_UNSND (&attr
);
15902 part_die
->has_type
= 1;
15904 case DW_AT_abstract_origin
:
15905 case DW_AT_specification
:
15906 case DW_AT_extension
:
15907 part_die
->has_specification
= 1;
15908 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
15909 part_die
->spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
15910 || cu
->per_cu
->is_dwz
);
15912 case DW_AT_sibling
:
15913 /* Ignore absolute siblings, they might point outside of
15914 the current compile unit. */
15915 if (attr
.form
== DW_FORM_ref_addr
)
15916 complaint (&symfile_complaints
,
15917 _("ignoring absolute DW_AT_sibling"));
15920 unsigned int off
= dwarf2_get_ref_die_offset (&attr
).sect_off
;
15921 const gdb_byte
*sibling_ptr
= buffer
+ off
;
15923 if (sibling_ptr
< info_ptr
)
15924 complaint (&symfile_complaints
,
15925 _("DW_AT_sibling points backwards"));
15926 else if (sibling_ptr
> reader
->buffer_end
)
15927 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
15929 part_die
->sibling
= sibling_ptr
;
15932 case DW_AT_byte_size
:
15933 part_die
->has_byte_size
= 1;
15935 case DW_AT_const_value
:
15936 part_die
->has_const_value
= 1;
15938 case DW_AT_calling_convention
:
15939 /* DWARF doesn't provide a way to identify a program's source-level
15940 entry point. DW_AT_calling_convention attributes are only meant
15941 to describe functions' calling conventions.
15943 However, because it's a necessary piece of information in
15944 Fortran, and because DW_CC_program is the only piece of debugging
15945 information whose definition refers to a 'main program' at all,
15946 several compilers have begun marking Fortran main programs with
15947 DW_CC_program --- even when those functions use the standard
15948 calling conventions.
15950 So until DWARF specifies a way to provide this information and
15951 compilers pick up the new representation, we'll support this
15953 if (DW_UNSND (&attr
) == DW_CC_program
15954 && cu
->language
== language_fortran
15955 && part_die
->name
!= NULL
)
15956 set_objfile_main_name (objfile
, part_die
->name
, language_fortran
);
15959 if (DW_UNSND (&attr
) == DW_INL_inlined
15960 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
15961 part_die
->may_be_inlined
= 1;
15965 if (part_die
->tag
== DW_TAG_imported_unit
)
15967 part_die
->d
.offset
= dwarf2_get_ref_die_offset (&attr
);
15968 part_die
->is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
15969 || cu
->per_cu
->is_dwz
);
15978 if (high_pc_relative
)
15979 part_die
->highpc
+= part_die
->lowpc
;
15981 if (has_low_pc_attr
&& has_high_pc_attr
)
15983 /* When using the GNU linker, .gnu.linkonce. sections are used to
15984 eliminate duplicate copies of functions and vtables and such.
15985 The linker will arbitrarily choose one and discard the others.
15986 The AT_*_pc values for such functions refer to local labels in
15987 these sections. If the section from that file was discarded, the
15988 labels are not in the output, so the relocs get a value of 0.
15989 If this is a discarded function, mark the pc bounds as invalid,
15990 so that GDB will ignore it. */
15991 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
15993 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15995 complaint (&symfile_complaints
,
15996 _("DW_AT_low_pc %s is zero "
15997 "for DIE at 0x%x [in module %s]"),
15998 paddress (gdbarch
, part_die
->lowpc
),
15999 part_die
->offset
.sect_off
, objfile_name (objfile
));
16001 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
16002 else if (part_die
->lowpc
>= part_die
->highpc
)
16004 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
16006 complaint (&symfile_complaints
,
16007 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
16008 "for DIE at 0x%x [in module %s]"),
16009 paddress (gdbarch
, part_die
->lowpc
),
16010 paddress (gdbarch
, part_die
->highpc
),
16011 part_die
->offset
.sect_off
, objfile_name (objfile
));
16014 part_die
->has_pc_info
= 1;
16020 /* Find a cached partial DIE at OFFSET in CU. */
16022 static struct partial_die_info
*
16023 find_partial_die_in_comp_unit (sect_offset offset
, struct dwarf2_cu
*cu
)
16025 struct partial_die_info
*lookup_die
= NULL
;
16026 struct partial_die_info part_die
;
16028 part_die
.offset
= offset
;
16029 lookup_die
= ((struct partial_die_info
*)
16030 htab_find_with_hash (cu
->partial_dies
, &part_die
,
16036 /* Find a partial DIE at OFFSET, which may or may not be in CU,
16037 except in the case of .debug_types DIEs which do not reference
16038 outside their CU (they do however referencing other types via
16039 DW_FORM_ref_sig8). */
16041 static struct partial_die_info
*
16042 find_partial_die (sect_offset offset
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
16044 struct objfile
*objfile
= cu
->objfile
;
16045 struct dwarf2_per_cu_data
*per_cu
= NULL
;
16046 struct partial_die_info
*pd
= NULL
;
16048 if (offset_in_dwz
== cu
->per_cu
->is_dwz
16049 && offset_in_cu_p (&cu
->header
, offset
))
16051 pd
= find_partial_die_in_comp_unit (offset
, cu
);
16054 /* We missed recording what we needed.
16055 Load all dies and try again. */
16056 per_cu
= cu
->per_cu
;
16060 /* TUs don't reference other CUs/TUs (except via type signatures). */
16061 if (cu
->per_cu
->is_debug_types
)
16063 error (_("Dwarf Error: Type Unit at offset 0x%lx contains"
16064 " external reference to offset 0x%lx [in module %s].\n"),
16065 (long) cu
->header
.offset
.sect_off
, (long) offset
.sect_off
,
16066 bfd_get_filename (objfile
->obfd
));
16068 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
16071 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
16072 load_partial_comp_unit (per_cu
);
16074 per_cu
->cu
->last_used
= 0;
16075 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
16078 /* If we didn't find it, and not all dies have been loaded,
16079 load them all and try again. */
16081 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
16083 per_cu
->load_all_dies
= 1;
16085 /* This is nasty. When we reread the DIEs, somewhere up the call chain
16086 THIS_CU->cu may already be in use. So we can't just free it and
16087 replace its DIEs with the ones we read in. Instead, we leave those
16088 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
16089 and clobber THIS_CU->cu->partial_dies with the hash table for the new
16091 load_partial_comp_unit (per_cu
);
16093 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
16097 internal_error (__FILE__
, __LINE__
,
16098 _("could not find partial DIE 0x%x "
16099 "in cache [from module %s]\n"),
16100 offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
16104 /* See if we can figure out if the class lives in a namespace. We do
16105 this by looking for a member function; its demangled name will
16106 contain namespace info, if there is any. */
16109 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
16110 struct dwarf2_cu
*cu
)
16112 /* NOTE: carlton/2003-10-07: Getting the info this way changes
16113 what template types look like, because the demangler
16114 frequently doesn't give the same name as the debug info. We
16115 could fix this by only using the demangled name to get the
16116 prefix (but see comment in read_structure_type). */
16118 struct partial_die_info
*real_pdi
;
16119 struct partial_die_info
*child_pdi
;
16121 /* If this DIE (this DIE's specification, if any) has a parent, then
16122 we should not do this. We'll prepend the parent's fully qualified
16123 name when we create the partial symbol. */
16125 real_pdi
= struct_pdi
;
16126 while (real_pdi
->has_specification
)
16127 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
16128 real_pdi
->spec_is_dwz
, cu
);
16130 if (real_pdi
->die_parent
!= NULL
)
16133 for (child_pdi
= struct_pdi
->die_child
;
16135 child_pdi
= child_pdi
->die_sibling
)
16137 if (child_pdi
->tag
== DW_TAG_subprogram
16138 && child_pdi
->linkage_name
!= NULL
)
16140 char *actual_class_name
16141 = language_class_name_from_physname (cu
->language_defn
,
16142 child_pdi
->linkage_name
);
16143 if (actual_class_name
!= NULL
)
16147 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
16149 strlen (actual_class_name
)));
16150 xfree (actual_class_name
);
16157 /* Adjust PART_DIE before generating a symbol for it. This function
16158 may set the is_external flag or change the DIE's name. */
16161 fixup_partial_die (struct partial_die_info
*part_die
,
16162 struct dwarf2_cu
*cu
)
16164 /* Once we've fixed up a die, there's no point in doing so again.
16165 This also avoids a memory leak if we were to call
16166 guess_partial_die_structure_name multiple times. */
16167 if (part_die
->fixup_called
)
16170 /* If we found a reference attribute and the DIE has no name, try
16171 to find a name in the referred to DIE. */
16173 if (part_die
->name
== NULL
&& part_die
->has_specification
)
16175 struct partial_die_info
*spec_die
;
16177 spec_die
= find_partial_die (part_die
->spec_offset
,
16178 part_die
->spec_is_dwz
, cu
);
16180 fixup_partial_die (spec_die
, cu
);
16182 if (spec_die
->name
)
16184 part_die
->name
= spec_die
->name
;
16186 /* Copy DW_AT_external attribute if it is set. */
16187 if (spec_die
->is_external
)
16188 part_die
->is_external
= spec_die
->is_external
;
16192 /* Set default names for some unnamed DIEs. */
16194 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
16195 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
16197 /* If there is no parent die to provide a namespace, and there are
16198 children, see if we can determine the namespace from their linkage
16200 if (cu
->language
== language_cplus
16201 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
16202 && part_die
->die_parent
== NULL
16203 && part_die
->has_children
16204 && (part_die
->tag
== DW_TAG_class_type
16205 || part_die
->tag
== DW_TAG_structure_type
16206 || part_die
->tag
== DW_TAG_union_type
))
16207 guess_partial_die_structure_name (part_die
, cu
);
16209 /* GCC might emit a nameless struct or union that has a linkage
16210 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
16211 if (part_die
->name
== NULL
16212 && (part_die
->tag
== DW_TAG_class_type
16213 || part_die
->tag
== DW_TAG_interface_type
16214 || part_die
->tag
== DW_TAG_structure_type
16215 || part_die
->tag
== DW_TAG_union_type
)
16216 && part_die
->linkage_name
!= NULL
)
16220 demangled
= gdb_demangle (part_die
->linkage_name
, DMGL_TYPES
);
16225 /* Strip any leading namespaces/classes, keep only the base name.
16226 DW_AT_name for named DIEs does not contain the prefixes. */
16227 base
= strrchr (demangled
, ':');
16228 if (base
&& base
> demangled
&& base
[-1] == ':')
16235 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
16236 base
, strlen (base
)));
16241 part_die
->fixup_called
= 1;
16244 /* Read an attribute value described by an attribute form. */
16246 static const gdb_byte
*
16247 read_attribute_value (const struct die_reader_specs
*reader
,
16248 struct attribute
*attr
, unsigned form
,
16249 const gdb_byte
*info_ptr
)
16251 struct dwarf2_cu
*cu
= reader
->cu
;
16252 struct objfile
*objfile
= cu
->objfile
;
16253 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
16254 bfd
*abfd
= reader
->abfd
;
16255 struct comp_unit_head
*cu_header
= &cu
->header
;
16256 unsigned int bytes_read
;
16257 struct dwarf_block
*blk
;
16259 attr
->form
= (enum dwarf_form
) form
;
16262 case DW_FORM_ref_addr
:
16263 if (cu
->header
.version
== 2)
16264 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
16266 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
16267 &cu
->header
, &bytes_read
);
16268 info_ptr
+= bytes_read
;
16270 case DW_FORM_GNU_ref_alt
:
16271 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
16272 info_ptr
+= bytes_read
;
16275 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
16276 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
16277 info_ptr
+= bytes_read
;
16279 case DW_FORM_block2
:
16280 blk
= dwarf_alloc_block (cu
);
16281 blk
->size
= read_2_bytes (abfd
, info_ptr
);
16283 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16284 info_ptr
+= blk
->size
;
16285 DW_BLOCK (attr
) = blk
;
16287 case DW_FORM_block4
:
16288 blk
= dwarf_alloc_block (cu
);
16289 blk
->size
= read_4_bytes (abfd
, info_ptr
);
16291 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16292 info_ptr
+= blk
->size
;
16293 DW_BLOCK (attr
) = blk
;
16295 case DW_FORM_data2
:
16296 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
16299 case DW_FORM_data4
:
16300 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
16303 case DW_FORM_data8
:
16304 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
16307 case DW_FORM_sec_offset
:
16308 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
16309 info_ptr
+= bytes_read
;
16311 case DW_FORM_string
:
16312 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
16313 DW_STRING_IS_CANONICAL (attr
) = 0;
16314 info_ptr
+= bytes_read
;
16317 if (!cu
->per_cu
->is_dwz
)
16319 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
16321 DW_STRING_IS_CANONICAL (attr
) = 0;
16322 info_ptr
+= bytes_read
;
16326 case DW_FORM_GNU_strp_alt
:
16328 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
16329 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
16332 DW_STRING (attr
) = read_indirect_string_from_dwz (dwz
, str_offset
);
16333 DW_STRING_IS_CANONICAL (attr
) = 0;
16334 info_ptr
+= bytes_read
;
16337 case DW_FORM_exprloc
:
16338 case DW_FORM_block
:
16339 blk
= dwarf_alloc_block (cu
);
16340 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16341 info_ptr
+= bytes_read
;
16342 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16343 info_ptr
+= blk
->size
;
16344 DW_BLOCK (attr
) = blk
;
16346 case DW_FORM_block1
:
16347 blk
= dwarf_alloc_block (cu
);
16348 blk
->size
= read_1_byte (abfd
, info_ptr
);
16350 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16351 info_ptr
+= blk
->size
;
16352 DW_BLOCK (attr
) = blk
;
16354 case DW_FORM_data1
:
16355 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16359 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16362 case DW_FORM_flag_present
:
16363 DW_UNSND (attr
) = 1;
16365 case DW_FORM_sdata
:
16366 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
16367 info_ptr
+= bytes_read
;
16369 case DW_FORM_udata
:
16370 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16371 info_ptr
+= bytes_read
;
16374 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16375 + read_1_byte (abfd
, info_ptr
));
16379 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16380 + read_2_bytes (abfd
, info_ptr
));
16384 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16385 + read_4_bytes (abfd
, info_ptr
));
16389 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16390 + read_8_bytes (abfd
, info_ptr
));
16393 case DW_FORM_ref_sig8
:
16394 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
16397 case DW_FORM_ref_udata
:
16398 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16399 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
16400 info_ptr
+= bytes_read
;
16402 case DW_FORM_indirect
:
16403 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16404 info_ptr
+= bytes_read
;
16405 info_ptr
= read_attribute_value (reader
, attr
, form
, info_ptr
);
16407 case DW_FORM_GNU_addr_index
:
16408 if (reader
->dwo_file
== NULL
)
16410 /* For now flag a hard error.
16411 Later we can turn this into a complaint. */
16412 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16413 dwarf_form_name (form
),
16414 bfd_get_filename (abfd
));
16416 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
16417 info_ptr
+= bytes_read
;
16419 case DW_FORM_GNU_str_index
:
16420 if (reader
->dwo_file
== NULL
)
16422 /* For now flag a hard error.
16423 Later we can turn this into a complaint if warranted. */
16424 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16425 dwarf_form_name (form
),
16426 bfd_get_filename (abfd
));
16429 ULONGEST str_index
=
16430 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16432 DW_STRING (attr
) = read_str_index (reader
, str_index
);
16433 DW_STRING_IS_CANONICAL (attr
) = 0;
16434 info_ptr
+= bytes_read
;
16438 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
16439 dwarf_form_name (form
),
16440 bfd_get_filename (abfd
));
16444 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
16445 attr
->form
= DW_FORM_GNU_ref_alt
;
16447 /* We have seen instances where the compiler tried to emit a byte
16448 size attribute of -1 which ended up being encoded as an unsigned
16449 0xffffffff. Although 0xffffffff is technically a valid size value,
16450 an object of this size seems pretty unlikely so we can relatively
16451 safely treat these cases as if the size attribute was invalid and
16452 treat them as zero by default. */
16453 if (attr
->name
== DW_AT_byte_size
16454 && form
== DW_FORM_data4
16455 && DW_UNSND (attr
) >= 0xffffffff)
16458 (&symfile_complaints
,
16459 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
16460 hex_string (DW_UNSND (attr
)));
16461 DW_UNSND (attr
) = 0;
16467 /* Read an attribute described by an abbreviated attribute. */
16469 static const gdb_byte
*
16470 read_attribute (const struct die_reader_specs
*reader
,
16471 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
16472 const gdb_byte
*info_ptr
)
16474 attr
->name
= abbrev
->name
;
16475 return read_attribute_value (reader
, attr
, abbrev
->form
, info_ptr
);
16478 /* Read dwarf information from a buffer. */
16480 static unsigned int
16481 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
16483 return bfd_get_8 (abfd
, buf
);
16487 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
16489 return bfd_get_signed_8 (abfd
, buf
);
16492 static unsigned int
16493 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16495 return bfd_get_16 (abfd
, buf
);
16499 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16501 return bfd_get_signed_16 (abfd
, buf
);
16504 static unsigned int
16505 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16507 return bfd_get_32 (abfd
, buf
);
16511 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16513 return bfd_get_signed_32 (abfd
, buf
);
16517 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16519 return bfd_get_64 (abfd
, buf
);
16523 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
16524 unsigned int *bytes_read
)
16526 struct comp_unit_head
*cu_header
= &cu
->header
;
16527 CORE_ADDR retval
= 0;
16529 if (cu_header
->signed_addr_p
)
16531 switch (cu_header
->addr_size
)
16534 retval
= bfd_get_signed_16 (abfd
, buf
);
16537 retval
= bfd_get_signed_32 (abfd
, buf
);
16540 retval
= bfd_get_signed_64 (abfd
, buf
);
16543 internal_error (__FILE__
, __LINE__
,
16544 _("read_address: bad switch, signed [in module %s]"),
16545 bfd_get_filename (abfd
));
16550 switch (cu_header
->addr_size
)
16553 retval
= bfd_get_16 (abfd
, buf
);
16556 retval
= bfd_get_32 (abfd
, buf
);
16559 retval
= bfd_get_64 (abfd
, buf
);
16562 internal_error (__FILE__
, __LINE__
,
16563 _("read_address: bad switch, "
16564 "unsigned [in module %s]"),
16565 bfd_get_filename (abfd
));
16569 *bytes_read
= cu_header
->addr_size
;
16573 /* Read the initial length from a section. The (draft) DWARF 3
16574 specification allows the initial length to take up either 4 bytes
16575 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
16576 bytes describe the length and all offsets will be 8 bytes in length
16579 An older, non-standard 64-bit format is also handled by this
16580 function. The older format in question stores the initial length
16581 as an 8-byte quantity without an escape value. Lengths greater
16582 than 2^32 aren't very common which means that the initial 4 bytes
16583 is almost always zero. Since a length value of zero doesn't make
16584 sense for the 32-bit format, this initial zero can be considered to
16585 be an escape value which indicates the presence of the older 64-bit
16586 format. As written, the code can't detect (old format) lengths
16587 greater than 4GB. If it becomes necessary to handle lengths
16588 somewhat larger than 4GB, we could allow other small values (such
16589 as the non-sensical values of 1, 2, and 3) to also be used as
16590 escape values indicating the presence of the old format.
16592 The value returned via bytes_read should be used to increment the
16593 relevant pointer after calling read_initial_length().
16595 [ Note: read_initial_length() and read_offset() are based on the
16596 document entitled "DWARF Debugging Information Format", revision
16597 3, draft 8, dated November 19, 2001. This document was obtained
16600 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
16602 This document is only a draft and is subject to change. (So beware.)
16604 Details regarding the older, non-standard 64-bit format were
16605 determined empirically by examining 64-bit ELF files produced by
16606 the SGI toolchain on an IRIX 6.5 machine.
16608 - Kevin, July 16, 2002
16612 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
16614 LONGEST length
= bfd_get_32 (abfd
, buf
);
16616 if (length
== 0xffffffff)
16618 length
= bfd_get_64 (abfd
, buf
+ 4);
16621 else if (length
== 0)
16623 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
16624 length
= bfd_get_64 (abfd
, buf
);
16635 /* Cover function for read_initial_length.
16636 Returns the length of the object at BUF, and stores the size of the
16637 initial length in *BYTES_READ and stores the size that offsets will be in
16639 If the initial length size is not equivalent to that specified in
16640 CU_HEADER then issue a complaint.
16641 This is useful when reading non-comp-unit headers. */
16644 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
16645 const struct comp_unit_head
*cu_header
,
16646 unsigned int *bytes_read
,
16647 unsigned int *offset_size
)
16649 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
16651 gdb_assert (cu_header
->initial_length_size
== 4
16652 || cu_header
->initial_length_size
== 8
16653 || cu_header
->initial_length_size
== 12);
16655 if (cu_header
->initial_length_size
!= *bytes_read
)
16656 complaint (&symfile_complaints
,
16657 _("intermixed 32-bit and 64-bit DWARF sections"));
16659 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
16663 /* Read an offset from the data stream. The size of the offset is
16664 given by cu_header->offset_size. */
16667 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
16668 const struct comp_unit_head
*cu_header
,
16669 unsigned int *bytes_read
)
16671 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
16673 *bytes_read
= cu_header
->offset_size
;
16677 /* Read an offset from the data stream. */
16680 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
16682 LONGEST retval
= 0;
16684 switch (offset_size
)
16687 retval
= bfd_get_32 (abfd
, buf
);
16690 retval
= bfd_get_64 (abfd
, buf
);
16693 internal_error (__FILE__
, __LINE__
,
16694 _("read_offset_1: bad switch [in module %s]"),
16695 bfd_get_filename (abfd
));
16701 static const gdb_byte
*
16702 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
16704 /* If the size of a host char is 8 bits, we can return a pointer
16705 to the buffer, otherwise we have to copy the data to a buffer
16706 allocated on the temporary obstack. */
16707 gdb_assert (HOST_CHAR_BIT
== 8);
16711 static const char *
16712 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
16713 unsigned int *bytes_read_ptr
)
16715 /* If the size of a host char is 8 bits, we can return a pointer
16716 to the string, otherwise we have to copy the string to a buffer
16717 allocated on the temporary obstack. */
16718 gdb_assert (HOST_CHAR_BIT
== 8);
16721 *bytes_read_ptr
= 1;
16724 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
16725 return (const char *) buf
;
16728 static const char *
16729 read_indirect_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
16731 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
16732 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
16733 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
16734 bfd_get_filename (abfd
));
16735 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
16736 error (_("DW_FORM_strp pointing outside of "
16737 ".debug_str section [in module %s]"),
16738 bfd_get_filename (abfd
));
16739 gdb_assert (HOST_CHAR_BIT
== 8);
16740 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
16742 return (const char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
16745 /* Read a string at offset STR_OFFSET in the .debug_str section from
16746 the .dwz file DWZ. Throw an error if the offset is too large. If
16747 the string consists of a single NUL byte, return NULL; otherwise
16748 return a pointer to the string. */
16750 static const char *
16751 read_indirect_string_from_dwz (struct dwz_file
*dwz
, LONGEST str_offset
)
16753 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwz
->str
);
16755 if (dwz
->str
.buffer
== NULL
)
16756 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
16757 "section [in module %s]"),
16758 bfd_get_filename (dwz
->dwz_bfd
));
16759 if (str_offset
>= dwz
->str
.size
)
16760 error (_("DW_FORM_GNU_strp_alt pointing outside of "
16761 ".debug_str section [in module %s]"),
16762 bfd_get_filename (dwz
->dwz_bfd
));
16763 gdb_assert (HOST_CHAR_BIT
== 8);
16764 if (dwz
->str
.buffer
[str_offset
] == '\0')
16766 return (const char *) (dwz
->str
.buffer
+ str_offset
);
16769 static const char *
16770 read_indirect_string (bfd
*abfd
, const gdb_byte
*buf
,
16771 const struct comp_unit_head
*cu_header
,
16772 unsigned int *bytes_read_ptr
)
16774 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
16776 return read_indirect_string_at_offset (abfd
, str_offset
);
16780 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
16781 unsigned int *bytes_read_ptr
)
16784 unsigned int num_read
;
16786 unsigned char byte
;
16794 byte
= bfd_get_8 (abfd
, buf
);
16797 result
|= ((ULONGEST
) (byte
& 127) << shift
);
16798 if ((byte
& 128) == 0)
16804 *bytes_read_ptr
= num_read
;
16809 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
16810 unsigned int *bytes_read_ptr
)
16813 int i
, shift
, num_read
;
16814 unsigned char byte
;
16822 byte
= bfd_get_8 (abfd
, buf
);
16825 result
|= ((LONGEST
) (byte
& 127) << shift
);
16827 if ((byte
& 128) == 0)
16832 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
16833 result
|= -(((LONGEST
) 1) << shift
);
16834 *bytes_read_ptr
= num_read
;
16838 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
16839 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
16840 ADDR_SIZE is the size of addresses from the CU header. */
16843 read_addr_index_1 (unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
16845 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16846 bfd
*abfd
= objfile
->obfd
;
16847 const gdb_byte
*info_ptr
;
16849 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
16850 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
16851 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
16852 objfile_name (objfile
));
16853 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
16854 error (_("DW_FORM_addr_index pointing outside of "
16855 ".debug_addr section [in module %s]"),
16856 objfile_name (objfile
));
16857 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
16858 + addr_base
+ addr_index
* addr_size
);
16859 if (addr_size
== 4)
16860 return bfd_get_32 (abfd
, info_ptr
);
16862 return bfd_get_64 (abfd
, info_ptr
);
16865 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
16868 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
16870 return read_addr_index_1 (addr_index
, cu
->addr_base
, cu
->header
.addr_size
);
16873 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
16876 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
16877 unsigned int *bytes_read
)
16879 bfd
*abfd
= cu
->objfile
->obfd
;
16880 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
16882 return read_addr_index (cu
, addr_index
);
16885 /* Data structure to pass results from dwarf2_read_addr_index_reader
16886 back to dwarf2_read_addr_index. */
16888 struct dwarf2_read_addr_index_data
16890 ULONGEST addr_base
;
16894 /* die_reader_func for dwarf2_read_addr_index. */
16897 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
16898 const gdb_byte
*info_ptr
,
16899 struct die_info
*comp_unit_die
,
16903 struct dwarf2_cu
*cu
= reader
->cu
;
16904 struct dwarf2_read_addr_index_data
*aidata
=
16905 (struct dwarf2_read_addr_index_data
*) data
;
16907 aidata
->addr_base
= cu
->addr_base
;
16908 aidata
->addr_size
= cu
->header
.addr_size
;
16911 /* Given an index in .debug_addr, fetch the value.
16912 NOTE: This can be called during dwarf expression evaluation,
16913 long after the debug information has been read, and thus per_cu->cu
16914 may no longer exist. */
16917 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
16918 unsigned int addr_index
)
16920 struct objfile
*objfile
= per_cu
->objfile
;
16921 struct dwarf2_cu
*cu
= per_cu
->cu
;
16922 ULONGEST addr_base
;
16925 /* This is intended to be called from outside this file. */
16926 dw2_setup (objfile
);
16928 /* We need addr_base and addr_size.
16929 If we don't have PER_CU->cu, we have to get it.
16930 Nasty, but the alternative is storing the needed info in PER_CU,
16931 which at this point doesn't seem justified: it's not clear how frequently
16932 it would get used and it would increase the size of every PER_CU.
16933 Entry points like dwarf2_per_cu_addr_size do a similar thing
16934 so we're not in uncharted territory here.
16935 Alas we need to be a bit more complicated as addr_base is contained
16938 We don't need to read the entire CU(/TU).
16939 We just need the header and top level die.
16941 IWBN to use the aging mechanism to let us lazily later discard the CU.
16942 For now we skip this optimization. */
16946 addr_base
= cu
->addr_base
;
16947 addr_size
= cu
->header
.addr_size
;
16951 struct dwarf2_read_addr_index_data aidata
;
16953 /* Note: We can't use init_cutu_and_read_dies_simple here,
16954 we need addr_base. */
16955 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
16956 dwarf2_read_addr_index_reader
, &aidata
);
16957 addr_base
= aidata
.addr_base
;
16958 addr_size
= aidata
.addr_size
;
16961 return read_addr_index_1 (addr_index
, addr_base
, addr_size
);
16964 /* Given a DW_FORM_GNU_str_index, fetch the string.
16965 This is only used by the Fission support. */
16967 static const char *
16968 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
16970 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16971 const char *objf_name
= objfile_name (objfile
);
16972 bfd
*abfd
= objfile
->obfd
;
16973 struct dwarf2_cu
*cu
= reader
->cu
;
16974 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
16975 struct dwarf2_section_info
*str_offsets_section
=
16976 &reader
->dwo_file
->sections
.str_offsets
;
16977 const gdb_byte
*info_ptr
;
16978 ULONGEST str_offset
;
16979 static const char form_name
[] = "DW_FORM_GNU_str_index";
16981 dwarf2_read_section (objfile
, str_section
);
16982 dwarf2_read_section (objfile
, str_offsets_section
);
16983 if (str_section
->buffer
== NULL
)
16984 error (_("%s used without .debug_str.dwo section"
16985 " in CU at offset 0x%lx [in module %s]"),
16986 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16987 if (str_offsets_section
->buffer
== NULL
)
16988 error (_("%s used without .debug_str_offsets.dwo section"
16989 " in CU at offset 0x%lx [in module %s]"),
16990 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16991 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
16992 error (_("%s pointing outside of .debug_str_offsets.dwo"
16993 " section in CU at offset 0x%lx [in module %s]"),
16994 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16995 info_ptr
= (str_offsets_section
->buffer
16996 + str_index
* cu
->header
.offset_size
);
16997 if (cu
->header
.offset_size
== 4)
16998 str_offset
= bfd_get_32 (abfd
, info_ptr
);
17000 str_offset
= bfd_get_64 (abfd
, info_ptr
);
17001 if (str_offset
>= str_section
->size
)
17002 error (_("Offset from %s pointing outside of"
17003 " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"),
17004 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
17005 return (const char *) (str_section
->buffer
+ str_offset
);
17008 /* Return the length of an LEB128 number in BUF. */
17011 leb128_size (const gdb_byte
*buf
)
17013 const gdb_byte
*begin
= buf
;
17019 if ((byte
& 128) == 0)
17020 return buf
- begin
;
17025 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
17034 cu
->language
= language_c
;
17036 case DW_LANG_C_plus_plus
:
17037 case DW_LANG_C_plus_plus_11
:
17038 case DW_LANG_C_plus_plus_14
:
17039 cu
->language
= language_cplus
;
17042 cu
->language
= language_d
;
17044 case DW_LANG_Fortran77
:
17045 case DW_LANG_Fortran90
:
17046 case DW_LANG_Fortran95
:
17047 case DW_LANG_Fortran03
:
17048 case DW_LANG_Fortran08
:
17049 cu
->language
= language_fortran
;
17052 cu
->language
= language_go
;
17054 case DW_LANG_Mips_Assembler
:
17055 cu
->language
= language_asm
;
17058 cu
->language
= language_java
;
17060 case DW_LANG_Ada83
:
17061 case DW_LANG_Ada95
:
17062 cu
->language
= language_ada
;
17064 case DW_LANG_Modula2
:
17065 cu
->language
= language_m2
;
17067 case DW_LANG_Pascal83
:
17068 cu
->language
= language_pascal
;
17071 cu
->language
= language_objc
;
17073 case DW_LANG_Cobol74
:
17074 case DW_LANG_Cobol85
:
17076 cu
->language
= language_minimal
;
17079 cu
->language_defn
= language_def (cu
->language
);
17082 /* Return the named attribute or NULL if not there. */
17084 static struct attribute
*
17085 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
17090 struct attribute
*spec
= NULL
;
17092 for (i
= 0; i
< die
->num_attrs
; ++i
)
17094 if (die
->attrs
[i
].name
== name
)
17095 return &die
->attrs
[i
];
17096 if (die
->attrs
[i
].name
== DW_AT_specification
17097 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
17098 spec
= &die
->attrs
[i
];
17104 die
= follow_die_ref (die
, spec
, &cu
);
17110 /* Return the named attribute or NULL if not there,
17111 but do not follow DW_AT_specification, etc.
17112 This is for use in contexts where we're reading .debug_types dies.
17113 Following DW_AT_specification, DW_AT_abstract_origin will take us
17114 back up the chain, and we want to go down. */
17116 static struct attribute
*
17117 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
17121 for (i
= 0; i
< die
->num_attrs
; ++i
)
17122 if (die
->attrs
[i
].name
== name
)
17123 return &die
->attrs
[i
];
17128 /* Return the string associated with a string-typed attribute, or NULL if it
17129 is either not found or is of an incorrect type. */
17131 static const char *
17132 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
17134 struct attribute
*attr
;
17135 const char *str
= NULL
;
17137 attr
= dwarf2_attr (die
, name
, cu
);
17141 if (attr
->form
== DW_FORM_strp
|| attr
->form
== DW_FORM_string
17142 || attr
->form
== DW_FORM_GNU_strp_alt
)
17143 str
= DW_STRING (attr
);
17145 complaint (&symfile_complaints
,
17146 _("string type expected for attribute %s for "
17147 "DIE at 0x%x in module %s"),
17148 dwarf_attr_name (name
), die
->offset
.sect_off
,
17149 objfile_name (cu
->objfile
));
17155 /* Return non-zero iff the attribute NAME is defined for the given DIE,
17156 and holds a non-zero value. This function should only be used for
17157 DW_FORM_flag or DW_FORM_flag_present attributes. */
17160 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
17162 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
17164 return (attr
&& DW_UNSND (attr
));
17168 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
17170 /* A DIE is a declaration if it has a DW_AT_declaration attribute
17171 which value is non-zero. However, we have to be careful with
17172 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
17173 (via dwarf2_flag_true_p) follows this attribute. So we may
17174 end up accidently finding a declaration attribute that belongs
17175 to a different DIE referenced by the specification attribute,
17176 even though the given DIE does not have a declaration attribute. */
17177 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
17178 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
17181 /* Return the die giving the specification for DIE, if there is
17182 one. *SPEC_CU is the CU containing DIE on input, and the CU
17183 containing the return value on output. If there is no
17184 specification, but there is an abstract origin, that is
17187 static struct die_info
*
17188 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
17190 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
17193 if (spec_attr
== NULL
)
17194 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
17196 if (spec_attr
== NULL
)
17199 return follow_die_ref (die
, spec_attr
, spec_cu
);
17202 /* Free the line_header structure *LH, and any arrays and strings it
17204 NOTE: This is also used as a "cleanup" function. */
17207 free_line_header (struct line_header
*lh
)
17209 if (lh
->standard_opcode_lengths
)
17210 xfree (lh
->standard_opcode_lengths
);
17212 /* Remember that all the lh->file_names[i].name pointers are
17213 pointers into debug_line_buffer, and don't need to be freed. */
17214 if (lh
->file_names
)
17215 xfree (lh
->file_names
);
17217 /* Similarly for the include directory names. */
17218 if (lh
->include_dirs
)
17219 xfree (lh
->include_dirs
);
17224 /* Stub for free_line_header to match void * callback types. */
17227 free_line_header_voidp (void *arg
)
17229 struct line_header
*lh
= (struct line_header
*) arg
;
17231 free_line_header (lh
);
17234 /* Add an entry to LH's include directory table. */
17237 add_include_dir (struct line_header
*lh
, const char *include_dir
)
17239 if (dwarf_line_debug
>= 2)
17240 fprintf_unfiltered (gdb_stdlog
, "Adding dir %u: %s\n",
17241 lh
->num_include_dirs
+ 1, include_dir
);
17243 /* Grow the array if necessary. */
17244 if (lh
->include_dirs_size
== 0)
17246 lh
->include_dirs_size
= 1; /* for testing */
17247 lh
->include_dirs
= XNEWVEC (const char *, lh
->include_dirs_size
);
17249 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
17251 lh
->include_dirs_size
*= 2;
17252 lh
->include_dirs
= XRESIZEVEC (const char *, lh
->include_dirs
,
17253 lh
->include_dirs_size
);
17256 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
17259 /* Add an entry to LH's file name table. */
17262 add_file_name (struct line_header
*lh
,
17264 unsigned int dir_index
,
17265 unsigned int mod_time
,
17266 unsigned int length
)
17268 struct file_entry
*fe
;
17270 if (dwarf_line_debug
>= 2)
17271 fprintf_unfiltered (gdb_stdlog
, "Adding file %u: %s\n",
17272 lh
->num_file_names
+ 1, name
);
17274 /* Grow the array if necessary. */
17275 if (lh
->file_names_size
== 0)
17277 lh
->file_names_size
= 1; /* for testing */
17278 lh
->file_names
= XNEWVEC (struct file_entry
, lh
->file_names_size
);
17280 else if (lh
->num_file_names
>= lh
->file_names_size
)
17282 lh
->file_names_size
*= 2;
17284 = XRESIZEVEC (struct file_entry
, lh
->file_names
, lh
->file_names_size
);
17287 fe
= &lh
->file_names
[lh
->num_file_names
++];
17289 fe
->dir_index
= dir_index
;
17290 fe
->mod_time
= mod_time
;
17291 fe
->length
= length
;
17292 fe
->included_p
= 0;
17296 /* A convenience function to find the proper .debug_line section for a CU. */
17298 static struct dwarf2_section_info
*
17299 get_debug_line_section (struct dwarf2_cu
*cu
)
17301 struct dwarf2_section_info
*section
;
17303 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
17305 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
17306 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
17307 else if (cu
->per_cu
->is_dwz
)
17309 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
17311 section
= &dwz
->line
;
17314 section
= &dwarf2_per_objfile
->line
;
17319 /* Read the statement program header starting at OFFSET in
17320 .debug_line, or .debug_line.dwo. Return a pointer
17321 to a struct line_header, allocated using xmalloc.
17322 Returns NULL if there is a problem reading the header, e.g., if it
17323 has a version we don't understand.
17325 NOTE: the strings in the include directory and file name tables of
17326 the returned object point into the dwarf line section buffer,
17327 and must not be freed. */
17329 static struct line_header
*
17330 dwarf_decode_line_header (unsigned int offset
, struct dwarf2_cu
*cu
)
17332 struct cleanup
*back_to
;
17333 struct line_header
*lh
;
17334 const gdb_byte
*line_ptr
;
17335 unsigned int bytes_read
, offset_size
;
17337 const char *cur_dir
, *cur_file
;
17338 struct dwarf2_section_info
*section
;
17341 section
= get_debug_line_section (cu
);
17342 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
17343 if (section
->buffer
== NULL
)
17345 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
17346 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
17348 complaint (&symfile_complaints
, _("missing .debug_line section"));
17352 /* We can't do this until we know the section is non-empty.
17353 Only then do we know we have such a section. */
17354 abfd
= get_section_bfd_owner (section
);
17356 /* Make sure that at least there's room for the total_length field.
17357 That could be 12 bytes long, but we're just going to fudge that. */
17358 if (offset
+ 4 >= section
->size
)
17360 dwarf2_statement_list_fits_in_line_number_section_complaint ();
17364 lh
= XNEW (struct line_header
);
17365 memset (lh
, 0, sizeof (*lh
));
17366 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
17369 lh
->offset
.sect_off
= offset
;
17370 lh
->offset_in_dwz
= cu
->per_cu
->is_dwz
;
17372 line_ptr
= section
->buffer
+ offset
;
17374 /* Read in the header. */
17376 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
17377 &bytes_read
, &offset_size
);
17378 line_ptr
+= bytes_read
;
17379 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
17381 dwarf2_statement_list_fits_in_line_number_section_complaint ();
17382 do_cleanups (back_to
);
17385 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
17386 lh
->version
= read_2_bytes (abfd
, line_ptr
);
17388 if (lh
->version
> 4)
17390 /* This is a version we don't understand. The format could have
17391 changed in ways we don't handle properly so just punt. */
17392 complaint (&symfile_complaints
,
17393 _("unsupported version in .debug_line section"));
17396 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
17397 line_ptr
+= offset_size
;
17398 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
17400 if (lh
->version
>= 4)
17402 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
17406 lh
->maximum_ops_per_instruction
= 1;
17408 if (lh
->maximum_ops_per_instruction
== 0)
17410 lh
->maximum_ops_per_instruction
= 1;
17411 complaint (&symfile_complaints
,
17412 _("invalid maximum_ops_per_instruction "
17413 "in `.debug_line' section"));
17416 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
17418 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
17420 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
17422 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
17424 lh
->standard_opcode_lengths
= XNEWVEC (unsigned char, lh
->opcode_base
);
17426 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
17427 for (i
= 1; i
< lh
->opcode_base
; ++i
)
17429 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
17433 /* Read directory table. */
17434 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
17436 line_ptr
+= bytes_read
;
17437 add_include_dir (lh
, cur_dir
);
17439 line_ptr
+= bytes_read
;
17441 /* Read file name table. */
17442 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
17444 unsigned int dir_index
, mod_time
, length
;
17446 line_ptr
+= bytes_read
;
17447 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17448 line_ptr
+= bytes_read
;
17449 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17450 line_ptr
+= bytes_read
;
17451 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17452 line_ptr
+= bytes_read
;
17454 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
17456 line_ptr
+= bytes_read
;
17457 lh
->statement_program_start
= line_ptr
;
17459 if (line_ptr
> (section
->buffer
+ section
->size
))
17460 complaint (&symfile_complaints
,
17461 _("line number info header doesn't "
17462 "fit in `.debug_line' section"));
17464 discard_cleanups (back_to
);
17468 /* Subroutine of dwarf_decode_lines to simplify it.
17469 Return the file name of the psymtab for included file FILE_INDEX
17470 in line header LH of PST.
17471 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
17472 If space for the result is malloc'd, it will be freed by a cleanup.
17473 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename.
17475 The function creates dangling cleanup registration. */
17477 static const char *
17478 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
17479 const struct partial_symtab
*pst
,
17480 const char *comp_dir
)
17482 const struct file_entry fe
= lh
->file_names
[file_index
];
17483 const char *include_name
= fe
.name
;
17484 const char *include_name_to_compare
= include_name
;
17485 const char *dir_name
= NULL
;
17486 const char *pst_filename
;
17487 char *copied_name
= NULL
;
17490 if (fe
.dir_index
&& lh
->include_dirs
!= NULL
)
17491 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
17493 if (!IS_ABSOLUTE_PATH (include_name
)
17494 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
17496 /* Avoid creating a duplicate psymtab for PST.
17497 We do this by comparing INCLUDE_NAME and PST_FILENAME.
17498 Before we do the comparison, however, we need to account
17499 for DIR_NAME and COMP_DIR.
17500 First prepend dir_name (if non-NULL). If we still don't
17501 have an absolute path prepend comp_dir (if non-NULL).
17502 However, the directory we record in the include-file's
17503 psymtab does not contain COMP_DIR (to match the
17504 corresponding symtab(s)).
17509 bash$ gcc -g ./hello.c
17510 include_name = "hello.c"
17512 DW_AT_comp_dir = comp_dir = "/tmp"
17513 DW_AT_name = "./hello.c"
17517 if (dir_name
!= NULL
)
17519 char *tem
= concat (dir_name
, SLASH_STRING
,
17520 include_name
, (char *)NULL
);
17522 make_cleanup (xfree
, tem
);
17523 include_name
= tem
;
17524 include_name_to_compare
= include_name
;
17526 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
17528 char *tem
= concat (comp_dir
, SLASH_STRING
,
17529 include_name
, (char *)NULL
);
17531 make_cleanup (xfree
, tem
);
17532 include_name_to_compare
= tem
;
17536 pst_filename
= pst
->filename
;
17537 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
17539 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
17540 pst_filename
, (char *)NULL
);
17541 pst_filename
= copied_name
;
17544 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
17546 if (copied_name
!= NULL
)
17547 xfree (copied_name
);
17551 return include_name
;
17554 /* State machine to track the state of the line number program. */
17558 /* These are part of the standard DWARF line number state machine. */
17560 unsigned char op_index
;
17565 unsigned int discriminator
;
17567 /* Additional bits of state we need to track. */
17569 /* The last file that we called dwarf2_start_subfile for.
17570 This is only used for TLLs. */
17571 unsigned int last_file
;
17572 /* The last file a line number was recorded for. */
17573 struct subfile
*last_subfile
;
17575 /* The function to call to record a line. */
17576 record_line_ftype
*record_line
;
17578 /* The last line number that was recorded, used to coalesce
17579 consecutive entries for the same line. This can happen, for
17580 example, when discriminators are present. PR 17276. */
17581 unsigned int last_line
;
17582 int line_has_non_zero_discriminator
;
17583 } lnp_state_machine
;
17585 /* There's a lot of static state to pass to dwarf_record_line.
17586 This keeps it all together. */
17591 struct gdbarch
*gdbarch
;
17593 /* The line number header. */
17594 struct line_header
*line_header
;
17596 /* Non-zero if we're recording lines.
17597 Otherwise we're building partial symtabs and are just interested in
17598 finding include files mentioned by the line number program. */
17599 int record_lines_p
;
17600 } lnp_reader_state
;
17602 /* Ignore this record_line request. */
17605 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
17610 /* Return non-zero if we should add LINE to the line number table.
17611 LINE is the line to add, LAST_LINE is the last line that was added,
17612 LAST_SUBFILE is the subfile for LAST_LINE.
17613 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
17614 had a non-zero discriminator.
17616 We have to be careful in the presence of discriminators.
17617 E.g., for this line:
17619 for (i = 0; i < 100000; i++);
17621 clang can emit four line number entries for that one line,
17622 each with a different discriminator.
17623 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
17625 However, we want gdb to coalesce all four entries into one.
17626 Otherwise the user could stepi into the middle of the line and
17627 gdb would get confused about whether the pc really was in the
17628 middle of the line.
17630 Things are further complicated by the fact that two consecutive
17631 line number entries for the same line is a heuristic used by gcc
17632 to denote the end of the prologue. So we can't just discard duplicate
17633 entries, we have to be selective about it. The heuristic we use is
17634 that we only collapse consecutive entries for the same line if at least
17635 one of those entries has a non-zero discriminator. PR 17276.
17637 Note: Addresses in the line number state machine can never go backwards
17638 within one sequence, thus this coalescing is ok. */
17641 dwarf_record_line_p (unsigned int line
, unsigned int last_line
,
17642 int line_has_non_zero_discriminator
,
17643 struct subfile
*last_subfile
)
17645 if (current_subfile
!= last_subfile
)
17647 if (line
!= last_line
)
17649 /* Same line for the same file that we've seen already.
17650 As a last check, for pr 17276, only record the line if the line
17651 has never had a non-zero discriminator. */
17652 if (!line_has_non_zero_discriminator
)
17657 /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS
17658 in the line table of subfile SUBFILE. */
17661 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
17662 unsigned int line
, CORE_ADDR address
,
17663 record_line_ftype p_record_line
)
17665 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
17667 if (dwarf_line_debug
)
17669 fprintf_unfiltered (gdb_stdlog
,
17670 "Recording line %u, file %s, address %s\n",
17671 line
, lbasename (subfile
->name
),
17672 paddress (gdbarch
, address
));
17675 (*p_record_line
) (subfile
, line
, addr
);
17678 /* Subroutine of dwarf_decode_lines_1 to simplify it.
17679 Mark the end of a set of line number records.
17680 The arguments are the same as for dwarf_record_line_1.
17681 If SUBFILE is NULL the request is ignored. */
17684 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
17685 CORE_ADDR address
, record_line_ftype p_record_line
)
17687 if (subfile
== NULL
)
17690 if (dwarf_line_debug
)
17692 fprintf_unfiltered (gdb_stdlog
,
17693 "Finishing current line, file %s, address %s\n",
17694 lbasename (subfile
->name
),
17695 paddress (gdbarch
, address
));
17698 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, p_record_line
);
17701 /* Record the line in STATE.
17702 END_SEQUENCE is non-zero if we're processing the end of a sequence. */
17705 dwarf_record_line (lnp_reader_state
*reader
, lnp_state_machine
*state
,
17708 const struct line_header
*lh
= reader
->line_header
;
17709 unsigned int file
, line
, discriminator
;
17712 file
= state
->file
;
17713 line
= state
->line
;
17714 is_stmt
= state
->is_stmt
;
17715 discriminator
= state
->discriminator
;
17717 if (dwarf_line_debug
)
17719 fprintf_unfiltered (gdb_stdlog
,
17720 "Processing actual line %u: file %u,"
17721 " address %s, is_stmt %u, discrim %u\n",
17723 paddress (reader
->gdbarch
, state
->address
),
17724 is_stmt
, discriminator
);
17727 if (file
== 0 || file
- 1 >= lh
->num_file_names
)
17728 dwarf2_debug_line_missing_file_complaint ();
17729 /* For now we ignore lines not starting on an instruction boundary.
17730 But not when processing end_sequence for compatibility with the
17731 previous version of the code. */
17732 else if (state
->op_index
== 0 || end_sequence
)
17734 lh
->file_names
[file
- 1].included_p
= 1;
17735 if (reader
->record_lines_p
&& is_stmt
)
17737 if (state
->last_subfile
!= current_subfile
|| end_sequence
)
17739 dwarf_finish_line (reader
->gdbarch
, state
->last_subfile
,
17740 state
->address
, state
->record_line
);
17745 if (dwarf_record_line_p (line
, state
->last_line
,
17746 state
->line_has_non_zero_discriminator
,
17747 state
->last_subfile
))
17749 dwarf_record_line_1 (reader
->gdbarch
, current_subfile
,
17750 line
, state
->address
,
17751 state
->record_line
);
17753 state
->last_subfile
= current_subfile
;
17754 state
->last_line
= line
;
17760 /* Initialize STATE for the start of a line number program. */
17763 init_lnp_state_machine (lnp_state_machine
*state
,
17764 const lnp_reader_state
*reader
)
17766 memset (state
, 0, sizeof (*state
));
17768 /* Just starting, there is no "last file". */
17769 state
->last_file
= 0;
17770 state
->last_subfile
= NULL
;
17772 state
->record_line
= record_line
;
17774 state
->last_line
= 0;
17775 state
->line_has_non_zero_discriminator
= 0;
17777 /* Initialize these according to the DWARF spec. */
17778 state
->op_index
= 0;
17781 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
17782 was a line entry for it so that the backend has a chance to adjust it
17783 and also record it in case it needs it. This is currently used by MIPS
17784 code, cf. `mips_adjust_dwarf2_line'. */
17785 state
->address
= gdbarch_adjust_dwarf2_line (reader
->gdbarch
, 0, 0);
17786 state
->is_stmt
= reader
->line_header
->default_is_stmt
;
17787 state
->discriminator
= 0;
17790 /* Check address and if invalid nop-out the rest of the lines in this
17794 check_line_address (struct dwarf2_cu
*cu
, lnp_state_machine
*state
,
17795 const gdb_byte
*line_ptr
,
17796 CORE_ADDR lowpc
, CORE_ADDR address
)
17798 /* If address < lowpc then it's not a usable value, it's outside the
17799 pc range of the CU. However, we restrict the test to only address
17800 values of zero to preserve GDB's previous behaviour which is to
17801 handle the specific case of a function being GC'd by the linker. */
17803 if (address
== 0 && address
< lowpc
)
17805 /* This line table is for a function which has been
17806 GCd by the linker. Ignore it. PR gdb/12528 */
17808 struct objfile
*objfile
= cu
->objfile
;
17809 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
17811 complaint (&symfile_complaints
,
17812 _(".debug_line address at offset 0x%lx is 0 [in module %s]"),
17813 line_offset
, objfile_name (objfile
));
17814 state
->record_line
= noop_record_line
;
17815 /* Note: sm.record_line is left as noop_record_line
17816 until we see DW_LNE_end_sequence. */
17820 /* Subroutine of dwarf_decode_lines to simplify it.
17821 Process the line number information in LH.
17822 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
17823 program in order to set included_p for every referenced header. */
17826 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
17827 const int decode_for_pst_p
, CORE_ADDR lowpc
)
17829 const gdb_byte
*line_ptr
, *extended_end
;
17830 const gdb_byte
*line_end
;
17831 unsigned int bytes_read
, extended_len
;
17832 unsigned char op_code
, extended_op
;
17833 CORE_ADDR baseaddr
;
17834 struct objfile
*objfile
= cu
->objfile
;
17835 bfd
*abfd
= objfile
->obfd
;
17836 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17837 /* Non-zero if we're recording line info (as opposed to building partial
17839 int record_lines_p
= !decode_for_pst_p
;
17840 /* A collection of things we need to pass to dwarf_record_line. */
17841 lnp_reader_state reader_state
;
17843 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
17845 line_ptr
= lh
->statement_program_start
;
17846 line_end
= lh
->statement_program_end
;
17848 reader_state
.gdbarch
= gdbarch
;
17849 reader_state
.line_header
= lh
;
17850 reader_state
.record_lines_p
= record_lines_p
;
17852 /* Read the statement sequences until there's nothing left. */
17853 while (line_ptr
< line_end
)
17855 /* The DWARF line number program state machine. */
17856 lnp_state_machine state_machine
;
17857 int end_sequence
= 0;
17859 /* Reset the state machine at the start of each sequence. */
17860 init_lnp_state_machine (&state_machine
, &reader_state
);
17862 if (record_lines_p
&& lh
->num_file_names
>= state_machine
.file
)
17864 /* Start a subfile for the current file of the state machine. */
17865 /* lh->include_dirs and lh->file_names are 0-based, but the
17866 directory and file name numbers in the statement program
17868 struct file_entry
*fe
= &lh
->file_names
[state_machine
.file
- 1];
17869 const char *dir
= NULL
;
17871 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
17872 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17874 dwarf2_start_subfile (fe
->name
, dir
);
17877 /* Decode the table. */
17878 while (line_ptr
< line_end
&& !end_sequence
)
17880 op_code
= read_1_byte (abfd
, line_ptr
);
17883 if (op_code
>= lh
->opcode_base
)
17885 /* Special opcode. */
17886 unsigned char adj_opcode
;
17887 CORE_ADDR addr_adj
;
17890 adj_opcode
= op_code
- lh
->opcode_base
;
17891 addr_adj
= (((state_machine
.op_index
17892 + (adj_opcode
/ lh
->line_range
))
17893 / lh
->maximum_ops_per_instruction
)
17894 * lh
->minimum_instruction_length
);
17895 state_machine
.address
17896 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17897 state_machine
.op_index
= ((state_machine
.op_index
17898 + (adj_opcode
/ lh
->line_range
))
17899 % lh
->maximum_ops_per_instruction
);
17900 line_delta
= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
17901 state_machine
.line
+= line_delta
;
17902 if (line_delta
!= 0)
17903 state_machine
.line_has_non_zero_discriminator
17904 = state_machine
.discriminator
!= 0;
17906 dwarf_record_line (&reader_state
, &state_machine
, 0);
17907 state_machine
.discriminator
= 0;
17909 else switch (op_code
)
17911 case DW_LNS_extended_op
:
17912 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
17914 line_ptr
+= bytes_read
;
17915 extended_end
= line_ptr
+ extended_len
;
17916 extended_op
= read_1_byte (abfd
, line_ptr
);
17918 switch (extended_op
)
17920 case DW_LNE_end_sequence
:
17921 state_machine
.record_line
= record_line
;
17924 case DW_LNE_set_address
:
17927 = read_address (abfd
, line_ptr
, cu
, &bytes_read
);
17929 line_ptr
+= bytes_read
;
17930 check_line_address (cu
, &state_machine
, line_ptr
,
17932 state_machine
.op_index
= 0;
17933 address
+= baseaddr
;
17934 state_machine
.address
17935 = gdbarch_adjust_dwarf2_line (gdbarch
, address
, 0);
17938 case DW_LNE_define_file
:
17940 const char *cur_file
;
17941 unsigned int dir_index
, mod_time
, length
;
17943 cur_file
= read_direct_string (abfd
, line_ptr
,
17945 line_ptr
+= bytes_read
;
17947 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17948 line_ptr
+= bytes_read
;
17950 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17951 line_ptr
+= bytes_read
;
17953 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17954 line_ptr
+= bytes_read
;
17955 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
17958 case DW_LNE_set_discriminator
:
17959 /* The discriminator is not interesting to the debugger;
17960 just ignore it. We still need to check its value though:
17961 if there are consecutive entries for the same
17962 (non-prologue) line we want to coalesce them.
17964 state_machine
.discriminator
17965 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17966 state_machine
.line_has_non_zero_discriminator
17967 |= state_machine
.discriminator
!= 0;
17968 line_ptr
+= bytes_read
;
17971 complaint (&symfile_complaints
,
17972 _("mangled .debug_line section"));
17975 /* Make sure that we parsed the extended op correctly. If e.g.
17976 we expected a different address size than the producer used,
17977 we may have read the wrong number of bytes. */
17978 if (line_ptr
!= extended_end
)
17980 complaint (&symfile_complaints
,
17981 _("mangled .debug_line section"));
17986 dwarf_record_line (&reader_state
, &state_machine
, 0);
17987 state_machine
.discriminator
= 0;
17989 case DW_LNS_advance_pc
:
17992 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17993 CORE_ADDR addr_adj
;
17995 addr_adj
= (((state_machine
.op_index
+ adjust
)
17996 / lh
->maximum_ops_per_instruction
)
17997 * lh
->minimum_instruction_length
);
17998 state_machine
.address
17999 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
18000 state_machine
.op_index
= ((state_machine
.op_index
+ adjust
)
18001 % lh
->maximum_ops_per_instruction
);
18002 line_ptr
+= bytes_read
;
18005 case DW_LNS_advance_line
:
18008 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
18010 state_machine
.line
+= line_delta
;
18011 if (line_delta
!= 0)
18012 state_machine
.line_has_non_zero_discriminator
18013 = state_machine
.discriminator
!= 0;
18014 line_ptr
+= bytes_read
;
18017 case DW_LNS_set_file
:
18019 /* The arrays lh->include_dirs and lh->file_names are
18020 0-based, but the directory and file name numbers in
18021 the statement program are 1-based. */
18022 struct file_entry
*fe
;
18023 const char *dir
= NULL
;
18025 state_machine
.file
= read_unsigned_leb128 (abfd
, line_ptr
,
18027 line_ptr
+= bytes_read
;
18028 if (state_machine
.file
== 0
18029 || state_machine
.file
- 1 >= lh
->num_file_names
)
18030 dwarf2_debug_line_missing_file_complaint ();
18033 fe
= &lh
->file_names
[state_machine
.file
- 1];
18034 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
18035 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
18036 if (record_lines_p
)
18038 state_machine
.last_subfile
= current_subfile
;
18039 state_machine
.line_has_non_zero_discriminator
18040 = state_machine
.discriminator
!= 0;
18041 dwarf2_start_subfile (fe
->name
, dir
);
18046 case DW_LNS_set_column
:
18047 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18048 line_ptr
+= bytes_read
;
18050 case DW_LNS_negate_stmt
:
18051 state_machine
.is_stmt
= (!state_machine
.is_stmt
);
18053 case DW_LNS_set_basic_block
:
18055 /* Add to the address register of the state machine the
18056 address increment value corresponding to special opcode
18057 255. I.e., this value is scaled by the minimum
18058 instruction length since special opcode 255 would have
18059 scaled the increment. */
18060 case DW_LNS_const_add_pc
:
18062 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
18063 CORE_ADDR addr_adj
;
18065 addr_adj
= (((state_machine
.op_index
+ adjust
)
18066 / lh
->maximum_ops_per_instruction
)
18067 * lh
->minimum_instruction_length
);
18068 state_machine
.address
18069 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
18070 state_machine
.op_index
= ((state_machine
.op_index
+ adjust
)
18071 % lh
->maximum_ops_per_instruction
);
18074 case DW_LNS_fixed_advance_pc
:
18076 CORE_ADDR addr_adj
;
18078 addr_adj
= read_2_bytes (abfd
, line_ptr
);
18079 state_machine
.address
18080 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
18081 state_machine
.op_index
= 0;
18087 /* Unknown standard opcode, ignore it. */
18090 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
18092 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18093 line_ptr
+= bytes_read
;
18100 dwarf2_debug_line_missing_end_sequence_complaint ();
18102 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
18103 in which case we still finish recording the last line). */
18104 dwarf_record_line (&reader_state
, &state_machine
, 1);
18108 /* Decode the Line Number Program (LNP) for the given line_header
18109 structure and CU. The actual information extracted and the type
18110 of structures created from the LNP depends on the value of PST.
18112 1. If PST is NULL, then this procedure uses the data from the program
18113 to create all necessary symbol tables, and their linetables.
18115 2. If PST is not NULL, this procedure reads the program to determine
18116 the list of files included by the unit represented by PST, and
18117 builds all the associated partial symbol tables.
18119 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
18120 It is used for relative paths in the line table.
18121 NOTE: When processing partial symtabs (pst != NULL),
18122 comp_dir == pst->dirname.
18124 NOTE: It is important that psymtabs have the same file name (via strcmp)
18125 as the corresponding symtab. Since COMP_DIR is not used in the name of the
18126 symtab we don't use it in the name of the psymtabs we create.
18127 E.g. expand_line_sal requires this when finding psymtabs to expand.
18128 A good testcase for this is mb-inline.exp.
18130 LOWPC is the lowest address in CU (or 0 if not known).
18132 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
18133 for its PC<->lines mapping information. Otherwise only the filename
18134 table is read in. */
18137 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
18138 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
18139 CORE_ADDR lowpc
, int decode_mapping
)
18141 struct objfile
*objfile
= cu
->objfile
;
18142 const int decode_for_pst_p
= (pst
!= NULL
);
18144 if (decode_mapping
)
18145 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
18147 if (decode_for_pst_p
)
18151 /* Now that we're done scanning the Line Header Program, we can
18152 create the psymtab of each included file. */
18153 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
18154 if (lh
->file_names
[file_index
].included_p
== 1)
18156 const char *include_name
=
18157 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
18158 if (include_name
!= NULL
)
18159 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
18164 /* Make sure a symtab is created for every file, even files
18165 which contain only variables (i.e. no code with associated
18167 struct compunit_symtab
*cust
= buildsym_compunit_symtab ();
18170 for (i
= 0; i
< lh
->num_file_names
; i
++)
18172 const char *dir
= NULL
;
18173 struct file_entry
*fe
;
18175 fe
= &lh
->file_names
[i
];
18176 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
18177 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
18178 dwarf2_start_subfile (fe
->name
, dir
);
18180 if (current_subfile
->symtab
== NULL
)
18182 current_subfile
->symtab
18183 = allocate_symtab (cust
, current_subfile
->name
);
18185 fe
->symtab
= current_subfile
->symtab
;
18190 /* Start a subfile for DWARF. FILENAME is the name of the file and
18191 DIRNAME the name of the source directory which contains FILENAME
18192 or NULL if not known.
18193 This routine tries to keep line numbers from identical absolute and
18194 relative file names in a common subfile.
18196 Using the `list' example from the GDB testsuite, which resides in
18197 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
18198 of /srcdir/list0.c yields the following debugging information for list0.c:
18200 DW_AT_name: /srcdir/list0.c
18201 DW_AT_comp_dir: /compdir
18202 files.files[0].name: list0.h
18203 files.files[0].dir: /srcdir
18204 files.files[1].name: list0.c
18205 files.files[1].dir: /srcdir
18207 The line number information for list0.c has to end up in a single
18208 subfile, so that `break /srcdir/list0.c:1' works as expected.
18209 start_subfile will ensure that this happens provided that we pass the
18210 concatenation of files.files[1].dir and files.files[1].name as the
18214 dwarf2_start_subfile (const char *filename
, const char *dirname
)
18218 /* In order not to lose the line information directory,
18219 we concatenate it to the filename when it makes sense.
18220 Note that the Dwarf3 standard says (speaking of filenames in line
18221 information): ``The directory index is ignored for file names
18222 that represent full path names''. Thus ignoring dirname in the
18223 `else' branch below isn't an issue. */
18225 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
18227 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
18231 start_subfile (filename
);
18237 /* Start a symtab for DWARF.
18238 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
18240 static struct compunit_symtab
*
18241 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
18242 const char *name
, const char *comp_dir
, CORE_ADDR low_pc
)
18244 struct compunit_symtab
*cust
18245 = start_symtab (cu
->objfile
, name
, comp_dir
, low_pc
);
18247 record_debugformat ("DWARF 2");
18248 record_producer (cu
->producer
);
18250 /* We assume that we're processing GCC output. */
18251 processing_gcc_compilation
= 2;
18253 cu
->processing_has_namespace_info
= 0;
18259 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
18260 struct dwarf2_cu
*cu
)
18262 struct objfile
*objfile
= cu
->objfile
;
18263 struct comp_unit_head
*cu_header
= &cu
->header
;
18265 /* NOTE drow/2003-01-30: There used to be a comment and some special
18266 code here to turn a symbol with DW_AT_external and a
18267 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
18268 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
18269 with some versions of binutils) where shared libraries could have
18270 relocations against symbols in their debug information - the
18271 minimal symbol would have the right address, but the debug info
18272 would not. It's no longer necessary, because we will explicitly
18273 apply relocations when we read in the debug information now. */
18275 /* A DW_AT_location attribute with no contents indicates that a
18276 variable has been optimized away. */
18277 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
18279 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
18283 /* Handle one degenerate form of location expression specially, to
18284 preserve GDB's previous behavior when section offsets are
18285 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
18286 then mark this symbol as LOC_STATIC. */
18288 if (attr_form_is_block (attr
)
18289 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
18290 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
18291 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
18292 && (DW_BLOCK (attr
)->size
18293 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
18295 unsigned int dummy
;
18297 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
18298 SYMBOL_VALUE_ADDRESS (sym
) =
18299 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
18301 SYMBOL_VALUE_ADDRESS (sym
) =
18302 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
18303 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
18304 fixup_symbol_section (sym
, objfile
);
18305 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
18306 SYMBOL_SECTION (sym
));
18310 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
18311 expression evaluator, and use LOC_COMPUTED only when necessary
18312 (i.e. when the value of a register or memory location is
18313 referenced, or a thread-local block, etc.). Then again, it might
18314 not be worthwhile. I'm assuming that it isn't unless performance
18315 or memory numbers show me otherwise. */
18317 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
18319 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
18320 cu
->has_loclist
= 1;
18323 /* Given a pointer to a DWARF information entry, figure out if we need
18324 to make a symbol table entry for it, and if so, create a new entry
18325 and return a pointer to it.
18326 If TYPE is NULL, determine symbol type from the die, otherwise
18327 used the passed type.
18328 If SPACE is not NULL, use it to hold the new symbol. If it is
18329 NULL, allocate a new symbol on the objfile's obstack. */
18331 static struct symbol
*
18332 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
18333 struct symbol
*space
)
18335 struct objfile
*objfile
= cu
->objfile
;
18336 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18337 struct symbol
*sym
= NULL
;
18339 struct attribute
*attr
= NULL
;
18340 struct attribute
*attr2
= NULL
;
18341 CORE_ADDR baseaddr
;
18342 struct pending
**list_to_add
= NULL
;
18344 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
18346 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
18348 name
= dwarf2_name (die
, cu
);
18351 const char *linkagename
;
18352 int suppress_add
= 0;
18357 sym
= allocate_symbol (objfile
);
18358 OBJSTAT (objfile
, n_syms
++);
18360 /* Cache this symbol's name and the name's demangled form (if any). */
18361 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
18362 linkagename
= dwarf2_physname (name
, die
, cu
);
18363 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
18365 /* Fortran does not have mangling standard and the mangling does differ
18366 between gfortran, iFort etc. */
18367 if (cu
->language
== language_fortran
18368 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
18369 symbol_set_demangled_name (&(sym
->ginfo
),
18370 dwarf2_full_name (name
, die
, cu
),
18373 /* Default assumptions.
18374 Use the passed type or decode it from the die. */
18375 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18376 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
18378 SYMBOL_TYPE (sym
) = type
;
18380 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
18381 attr
= dwarf2_attr (die
,
18382 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
18386 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
18389 attr
= dwarf2_attr (die
,
18390 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
18394 int file_index
= DW_UNSND (attr
);
18396 if (cu
->line_header
== NULL
18397 || file_index
> cu
->line_header
->num_file_names
)
18398 complaint (&symfile_complaints
,
18399 _("file index out of range"));
18400 else if (file_index
> 0)
18402 struct file_entry
*fe
;
18404 fe
= &cu
->line_header
->file_names
[file_index
- 1];
18405 symbol_set_symtab (sym
, fe
->symtab
);
18412 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
18417 addr
= attr_value_as_address (attr
);
18418 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
18419 SYMBOL_VALUE_ADDRESS (sym
) = addr
;
18421 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
18422 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
18423 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
18424 add_symbol_to_list (sym
, cu
->list_in_scope
);
18426 case DW_TAG_subprogram
:
18427 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
18429 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
18430 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18431 if ((attr2
&& (DW_UNSND (attr2
) != 0))
18432 || cu
->language
== language_ada
)
18434 /* Subprograms marked external are stored as a global symbol.
18435 Ada subprograms, whether marked external or not, are always
18436 stored as a global symbol, because we want to be able to
18437 access them globally. For instance, we want to be able
18438 to break on a nested subprogram without having to
18439 specify the context. */
18440 list_to_add
= &global_symbols
;
18444 list_to_add
= cu
->list_in_scope
;
18447 case DW_TAG_inlined_subroutine
:
18448 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
18450 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
18451 SYMBOL_INLINED (sym
) = 1;
18452 list_to_add
= cu
->list_in_scope
;
18454 case DW_TAG_template_value_param
:
18456 /* Fall through. */
18457 case DW_TAG_constant
:
18458 case DW_TAG_variable
:
18459 case DW_TAG_member
:
18460 /* Compilation with minimal debug info may result in
18461 variables with missing type entries. Change the
18462 misleading `void' type to something sensible. */
18463 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
18465 = objfile_type (objfile
)->nodebug_data_symbol
;
18467 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18468 /* In the case of DW_TAG_member, we should only be called for
18469 static const members. */
18470 if (die
->tag
== DW_TAG_member
)
18472 /* dwarf2_add_field uses die_is_declaration,
18473 so we do the same. */
18474 gdb_assert (die_is_declaration (die
, cu
));
18479 dwarf2_const_value (attr
, sym
, cu
);
18480 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18483 if (attr2
&& (DW_UNSND (attr2
) != 0))
18484 list_to_add
= &global_symbols
;
18486 list_to_add
= cu
->list_in_scope
;
18490 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
18493 var_decode_location (attr
, sym
, cu
);
18494 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18496 /* Fortran explicitly imports any global symbols to the local
18497 scope by DW_TAG_common_block. */
18498 if (cu
->language
== language_fortran
&& die
->parent
18499 && die
->parent
->tag
== DW_TAG_common_block
)
18502 if (SYMBOL_CLASS (sym
) == LOC_STATIC
18503 && SYMBOL_VALUE_ADDRESS (sym
) == 0
18504 && !dwarf2_per_objfile
->has_section_at_zero
)
18506 /* When a static variable is eliminated by the linker,
18507 the corresponding debug information is not stripped
18508 out, but the variable address is set to null;
18509 do not add such variables into symbol table. */
18511 else if (attr2
&& (DW_UNSND (attr2
) != 0))
18513 /* Workaround gfortran PR debug/40040 - it uses
18514 DW_AT_location for variables in -fPIC libraries which may
18515 get overriden by other libraries/executable and get
18516 a different address. Resolve it by the minimal symbol
18517 which may come from inferior's executable using copy
18518 relocation. Make this workaround only for gfortran as for
18519 other compilers GDB cannot guess the minimal symbol
18520 Fortran mangling kind. */
18521 if (cu
->language
== language_fortran
&& die
->parent
18522 && die
->parent
->tag
== DW_TAG_module
18524 && startswith (cu
->producer
, "GNU Fortran"))
18525 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
18527 /* A variable with DW_AT_external is never static,
18528 but it may be block-scoped. */
18529 list_to_add
= (cu
->list_in_scope
== &file_symbols
18530 ? &global_symbols
: cu
->list_in_scope
);
18533 list_to_add
= cu
->list_in_scope
;
18537 /* We do not know the address of this symbol.
18538 If it is an external symbol and we have type information
18539 for it, enter the symbol as a LOC_UNRESOLVED symbol.
18540 The address of the variable will then be determined from
18541 the minimal symbol table whenever the variable is
18543 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18545 /* Fortran explicitly imports any global symbols to the local
18546 scope by DW_TAG_common_block. */
18547 if (cu
->language
== language_fortran
&& die
->parent
18548 && die
->parent
->tag
== DW_TAG_common_block
)
18550 /* SYMBOL_CLASS doesn't matter here because
18551 read_common_block is going to reset it. */
18553 list_to_add
= cu
->list_in_scope
;
18555 else if (attr2
&& (DW_UNSND (attr2
) != 0)
18556 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
18558 /* A variable with DW_AT_external is never static, but it
18559 may be block-scoped. */
18560 list_to_add
= (cu
->list_in_scope
== &file_symbols
18561 ? &global_symbols
: cu
->list_in_scope
);
18563 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
18565 else if (!die_is_declaration (die
, cu
))
18567 /* Use the default LOC_OPTIMIZED_OUT class. */
18568 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
18570 list_to_add
= cu
->list_in_scope
;
18574 case DW_TAG_formal_parameter
:
18575 /* If we are inside a function, mark this as an argument. If
18576 not, we might be looking at an argument to an inlined function
18577 when we do not have enough information to show inlined frames;
18578 pretend it's a local variable in that case so that the user can
18580 if (context_stack_depth
> 0
18581 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
18582 SYMBOL_IS_ARGUMENT (sym
) = 1;
18583 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
18586 var_decode_location (attr
, sym
, cu
);
18588 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18591 dwarf2_const_value (attr
, sym
, cu
);
18594 list_to_add
= cu
->list_in_scope
;
18596 case DW_TAG_unspecified_parameters
:
18597 /* From varargs functions; gdb doesn't seem to have any
18598 interest in this information, so just ignore it for now.
18601 case DW_TAG_template_type_param
:
18603 /* Fall through. */
18604 case DW_TAG_class_type
:
18605 case DW_TAG_interface_type
:
18606 case DW_TAG_structure_type
:
18607 case DW_TAG_union_type
:
18608 case DW_TAG_set_type
:
18609 case DW_TAG_enumeration_type
:
18610 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18611 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
18614 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
18615 really ever be static objects: otherwise, if you try
18616 to, say, break of a class's method and you're in a file
18617 which doesn't mention that class, it won't work unless
18618 the check for all static symbols in lookup_symbol_aux
18619 saves you. See the OtherFileClass tests in
18620 gdb.c++/namespace.exp. */
18624 list_to_add
= (cu
->list_in_scope
== &file_symbols
18625 && (cu
->language
== language_cplus
18626 || cu
->language
== language_java
)
18627 ? &global_symbols
: cu
->list_in_scope
);
18629 /* The semantics of C++ state that "struct foo {
18630 ... }" also defines a typedef for "foo". A Java
18631 class declaration also defines a typedef for the
18633 if (cu
->language
== language_cplus
18634 || cu
->language
== language_java
18635 || cu
->language
== language_ada
18636 || cu
->language
== language_d
)
18638 /* The symbol's name is already allocated along
18639 with this objfile, so we don't need to
18640 duplicate it for the type. */
18641 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
18642 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
18647 case DW_TAG_typedef
:
18648 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18649 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18650 list_to_add
= cu
->list_in_scope
;
18652 case DW_TAG_base_type
:
18653 case DW_TAG_subrange_type
:
18654 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18655 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18656 list_to_add
= cu
->list_in_scope
;
18658 case DW_TAG_enumerator
:
18659 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18662 dwarf2_const_value (attr
, sym
, cu
);
18665 /* NOTE: carlton/2003-11-10: See comment above in the
18666 DW_TAG_class_type, etc. block. */
18668 list_to_add
= (cu
->list_in_scope
== &file_symbols
18669 && (cu
->language
== language_cplus
18670 || cu
->language
== language_java
)
18671 ? &global_symbols
: cu
->list_in_scope
);
18674 case DW_TAG_imported_declaration
:
18675 case DW_TAG_namespace
:
18676 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18677 list_to_add
= &global_symbols
;
18679 case DW_TAG_module
:
18680 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18681 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
18682 list_to_add
= &global_symbols
;
18684 case DW_TAG_common_block
:
18685 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
18686 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
18687 add_symbol_to_list (sym
, cu
->list_in_scope
);
18690 /* Not a tag we recognize. Hopefully we aren't processing
18691 trash data, but since we must specifically ignore things
18692 we don't recognize, there is nothing else we should do at
18694 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
18695 dwarf_tag_name (die
->tag
));
18701 sym
->hash_next
= objfile
->template_symbols
;
18702 objfile
->template_symbols
= sym
;
18703 list_to_add
= NULL
;
18706 if (list_to_add
!= NULL
)
18707 add_symbol_to_list (sym
, list_to_add
);
18709 /* For the benefit of old versions of GCC, check for anonymous
18710 namespaces based on the demangled name. */
18711 if (!cu
->processing_has_namespace_info
18712 && cu
->language
== language_cplus
)
18713 cp_scan_for_anonymous_namespaces (sym
, objfile
);
18718 /* A wrapper for new_symbol_full that always allocates a new symbol. */
18720 static struct symbol
*
18721 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
18723 return new_symbol_full (die
, type
, cu
, NULL
);
18726 /* Given an attr with a DW_FORM_dataN value in host byte order,
18727 zero-extend it as appropriate for the symbol's type. The DWARF
18728 standard (v4) is not entirely clear about the meaning of using
18729 DW_FORM_dataN for a constant with a signed type, where the type is
18730 wider than the data. The conclusion of a discussion on the DWARF
18731 list was that this is unspecified. We choose to always zero-extend
18732 because that is the interpretation long in use by GCC. */
18735 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
18736 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
18738 struct objfile
*objfile
= cu
->objfile
;
18739 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
18740 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
18741 LONGEST l
= DW_UNSND (attr
);
18743 if (bits
< sizeof (*value
) * 8)
18745 l
&= ((LONGEST
) 1 << bits
) - 1;
18748 else if (bits
== sizeof (*value
) * 8)
18752 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
18753 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
18760 /* Read a constant value from an attribute. Either set *VALUE, or if
18761 the value does not fit in *VALUE, set *BYTES - either already
18762 allocated on the objfile obstack, or newly allocated on OBSTACK,
18763 or, set *BATON, if we translated the constant to a location
18767 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
18768 const char *name
, struct obstack
*obstack
,
18769 struct dwarf2_cu
*cu
,
18770 LONGEST
*value
, const gdb_byte
**bytes
,
18771 struct dwarf2_locexpr_baton
**baton
)
18773 struct objfile
*objfile
= cu
->objfile
;
18774 struct comp_unit_head
*cu_header
= &cu
->header
;
18775 struct dwarf_block
*blk
;
18776 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
18777 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
18783 switch (attr
->form
)
18786 case DW_FORM_GNU_addr_index
:
18790 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
18791 dwarf2_const_value_length_mismatch_complaint (name
,
18792 cu_header
->addr_size
,
18793 TYPE_LENGTH (type
));
18794 /* Symbols of this form are reasonably rare, so we just
18795 piggyback on the existing location code rather than writing
18796 a new implementation of symbol_computed_ops. */
18797 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
18798 (*baton
)->per_cu
= cu
->per_cu
;
18799 gdb_assert ((*baton
)->per_cu
);
18801 (*baton
)->size
= 2 + cu_header
->addr_size
;
18802 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
18803 (*baton
)->data
= data
;
18805 data
[0] = DW_OP_addr
;
18806 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
18807 byte_order
, DW_ADDR (attr
));
18808 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
18811 case DW_FORM_string
:
18813 case DW_FORM_GNU_str_index
:
18814 case DW_FORM_GNU_strp_alt
:
18815 /* DW_STRING is already allocated on the objfile obstack, point
18817 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
18819 case DW_FORM_block1
:
18820 case DW_FORM_block2
:
18821 case DW_FORM_block4
:
18822 case DW_FORM_block
:
18823 case DW_FORM_exprloc
:
18824 blk
= DW_BLOCK (attr
);
18825 if (TYPE_LENGTH (type
) != blk
->size
)
18826 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
18827 TYPE_LENGTH (type
));
18828 *bytes
= blk
->data
;
18831 /* The DW_AT_const_value attributes are supposed to carry the
18832 symbol's value "represented as it would be on the target
18833 architecture." By the time we get here, it's already been
18834 converted to host endianness, so we just need to sign- or
18835 zero-extend it as appropriate. */
18836 case DW_FORM_data1
:
18837 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
18839 case DW_FORM_data2
:
18840 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
18842 case DW_FORM_data4
:
18843 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
18845 case DW_FORM_data8
:
18846 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
18849 case DW_FORM_sdata
:
18850 *value
= DW_SND (attr
);
18853 case DW_FORM_udata
:
18854 *value
= DW_UNSND (attr
);
18858 complaint (&symfile_complaints
,
18859 _("unsupported const value attribute form: '%s'"),
18860 dwarf_form_name (attr
->form
));
18867 /* Copy constant value from an attribute to a symbol. */
18870 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
18871 struct dwarf2_cu
*cu
)
18873 struct objfile
*objfile
= cu
->objfile
;
18874 struct comp_unit_head
*cu_header
= &cu
->header
;
18876 const gdb_byte
*bytes
;
18877 struct dwarf2_locexpr_baton
*baton
;
18879 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
18880 SYMBOL_PRINT_NAME (sym
),
18881 &objfile
->objfile_obstack
, cu
,
18882 &value
, &bytes
, &baton
);
18886 SYMBOL_LOCATION_BATON (sym
) = baton
;
18887 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
18889 else if (bytes
!= NULL
)
18891 SYMBOL_VALUE_BYTES (sym
) = bytes
;
18892 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
18896 SYMBOL_VALUE (sym
) = value
;
18897 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
18901 /* Return the type of the die in question using its DW_AT_type attribute. */
18903 static struct type
*
18904 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18906 struct attribute
*type_attr
;
18908 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
18911 /* A missing DW_AT_type represents a void type. */
18912 return objfile_type (cu
->objfile
)->builtin_void
;
18915 return lookup_die_type (die
, type_attr
, cu
);
18918 /* True iff CU's producer generates GNAT Ada auxiliary information
18919 that allows to find parallel types through that information instead
18920 of having to do expensive parallel lookups by type name. */
18923 need_gnat_info (struct dwarf2_cu
*cu
)
18925 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
18926 of GNAT produces this auxiliary information, without any indication
18927 that it is produced. Part of enhancing the FSF version of GNAT
18928 to produce that information will be to put in place an indicator
18929 that we can use in order to determine whether the descriptive type
18930 info is available or not. One suggestion that has been made is
18931 to use a new attribute, attached to the CU die. For now, assume
18932 that the descriptive type info is not available. */
18936 /* Return the auxiliary type of the die in question using its
18937 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
18938 attribute is not present. */
18940 static struct type
*
18941 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18943 struct attribute
*type_attr
;
18945 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
18949 return lookup_die_type (die
, type_attr
, cu
);
18952 /* If DIE has a descriptive_type attribute, then set the TYPE's
18953 descriptive type accordingly. */
18956 set_descriptive_type (struct type
*type
, struct die_info
*die
,
18957 struct dwarf2_cu
*cu
)
18959 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
18961 if (descriptive_type
)
18963 ALLOCATE_GNAT_AUX_TYPE (type
);
18964 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
18968 /* Return the containing type of the die in question using its
18969 DW_AT_containing_type attribute. */
18971 static struct type
*
18972 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18974 struct attribute
*type_attr
;
18976 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
18978 error (_("Dwarf Error: Problem turning containing type into gdb type "
18979 "[in module %s]"), objfile_name (cu
->objfile
));
18981 return lookup_die_type (die
, type_attr
, cu
);
18984 /* Return an error marker type to use for the ill formed type in DIE/CU. */
18986 static struct type
*
18987 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
18989 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18990 char *message
, *saved
;
18992 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
18993 objfile_name (objfile
),
18994 cu
->header
.offset
.sect_off
,
18995 die
->offset
.sect_off
);
18996 saved
= (char *) obstack_copy0 (&objfile
->objfile_obstack
,
18997 message
, strlen (message
));
19000 return init_type (TYPE_CODE_ERROR
, 0, 0, saved
, objfile
);
19003 /* Look up the type of DIE in CU using its type attribute ATTR.
19004 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
19005 DW_AT_containing_type.
19006 If there is no type substitute an error marker. */
19008 static struct type
*
19009 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
19010 struct dwarf2_cu
*cu
)
19012 struct objfile
*objfile
= cu
->objfile
;
19013 struct type
*this_type
;
19015 gdb_assert (attr
->name
== DW_AT_type
19016 || attr
->name
== DW_AT_GNAT_descriptive_type
19017 || attr
->name
== DW_AT_containing_type
);
19019 /* First see if we have it cached. */
19021 if (attr
->form
== DW_FORM_GNU_ref_alt
)
19023 struct dwarf2_per_cu_data
*per_cu
;
19024 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
19026 per_cu
= dwarf2_find_containing_comp_unit (offset
, 1, cu
->objfile
);
19027 this_type
= get_die_type_at_offset (offset
, per_cu
);
19029 else if (attr_form_is_ref (attr
))
19031 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
19033 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
19035 else if (attr
->form
== DW_FORM_ref_sig8
)
19037 ULONGEST signature
= DW_SIGNATURE (attr
);
19039 return get_signatured_type (die
, signature
, cu
);
19043 complaint (&symfile_complaints
,
19044 _("Dwarf Error: Bad type attribute %s in DIE"
19045 " at 0x%x [in module %s]"),
19046 dwarf_attr_name (attr
->name
), die
->offset
.sect_off
,
19047 objfile_name (objfile
));
19048 return build_error_marker_type (cu
, die
);
19051 /* If not cached we need to read it in. */
19053 if (this_type
== NULL
)
19055 struct die_info
*type_die
= NULL
;
19056 struct dwarf2_cu
*type_cu
= cu
;
19058 if (attr_form_is_ref (attr
))
19059 type_die
= follow_die_ref (die
, attr
, &type_cu
);
19060 if (type_die
== NULL
)
19061 return build_error_marker_type (cu
, die
);
19062 /* If we find the type now, it's probably because the type came
19063 from an inter-CU reference and the type's CU got expanded before
19065 this_type
= read_type_die (type_die
, type_cu
);
19068 /* If we still don't have a type use an error marker. */
19070 if (this_type
== NULL
)
19071 return build_error_marker_type (cu
, die
);
19076 /* Return the type in DIE, CU.
19077 Returns NULL for invalid types.
19079 This first does a lookup in die_type_hash,
19080 and only reads the die in if necessary.
19082 NOTE: This can be called when reading in partial or full symbols. */
19084 static struct type
*
19085 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
19087 struct type
*this_type
;
19089 this_type
= get_die_type (die
, cu
);
19093 return read_type_die_1 (die
, cu
);
19096 /* Read the type in DIE, CU.
19097 Returns NULL for invalid types. */
19099 static struct type
*
19100 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
19102 struct type
*this_type
= NULL
;
19106 case DW_TAG_class_type
:
19107 case DW_TAG_interface_type
:
19108 case DW_TAG_structure_type
:
19109 case DW_TAG_union_type
:
19110 this_type
= read_structure_type (die
, cu
);
19112 case DW_TAG_enumeration_type
:
19113 this_type
= read_enumeration_type (die
, cu
);
19115 case DW_TAG_subprogram
:
19116 case DW_TAG_subroutine_type
:
19117 case DW_TAG_inlined_subroutine
:
19118 this_type
= read_subroutine_type (die
, cu
);
19120 case DW_TAG_array_type
:
19121 this_type
= read_array_type (die
, cu
);
19123 case DW_TAG_set_type
:
19124 this_type
= read_set_type (die
, cu
);
19126 case DW_TAG_pointer_type
:
19127 this_type
= read_tag_pointer_type (die
, cu
);
19129 case DW_TAG_ptr_to_member_type
:
19130 this_type
= read_tag_ptr_to_member_type (die
, cu
);
19132 case DW_TAG_reference_type
:
19133 this_type
= read_tag_reference_type (die
, cu
);
19135 case DW_TAG_const_type
:
19136 this_type
= read_tag_const_type (die
, cu
);
19138 case DW_TAG_volatile_type
:
19139 this_type
= read_tag_volatile_type (die
, cu
);
19141 case DW_TAG_restrict_type
:
19142 this_type
= read_tag_restrict_type (die
, cu
);
19144 case DW_TAG_string_type
:
19145 this_type
= read_tag_string_type (die
, cu
);
19147 case DW_TAG_typedef
:
19148 this_type
= read_typedef (die
, cu
);
19150 case DW_TAG_subrange_type
:
19151 this_type
= read_subrange_type (die
, cu
);
19153 case DW_TAG_base_type
:
19154 this_type
= read_base_type (die
, cu
);
19156 case DW_TAG_unspecified_type
:
19157 this_type
= read_unspecified_type (die
, cu
);
19159 case DW_TAG_namespace
:
19160 this_type
= read_namespace_type (die
, cu
);
19162 case DW_TAG_module
:
19163 this_type
= read_module_type (die
, cu
);
19165 case DW_TAG_atomic_type
:
19166 this_type
= read_tag_atomic_type (die
, cu
);
19169 complaint (&symfile_complaints
,
19170 _("unexpected tag in read_type_die: '%s'"),
19171 dwarf_tag_name (die
->tag
));
19178 /* See if we can figure out if the class lives in a namespace. We do
19179 this by looking for a member function; its demangled name will
19180 contain namespace info, if there is any.
19181 Return the computed name or NULL.
19182 Space for the result is allocated on the objfile's obstack.
19183 This is the full-die version of guess_partial_die_structure_name.
19184 In this case we know DIE has no useful parent. */
19187 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19189 struct die_info
*spec_die
;
19190 struct dwarf2_cu
*spec_cu
;
19191 struct die_info
*child
;
19194 spec_die
= die_specification (die
, &spec_cu
);
19195 if (spec_die
!= NULL
)
19201 for (child
= die
->child
;
19203 child
= child
->sibling
)
19205 if (child
->tag
== DW_TAG_subprogram
)
19207 const char *linkage_name
;
19209 linkage_name
= dwarf2_string_attr (child
, DW_AT_linkage_name
, cu
);
19210 if (linkage_name
== NULL
)
19211 linkage_name
= dwarf2_string_attr (child
, DW_AT_MIPS_linkage_name
,
19213 if (linkage_name
!= NULL
)
19216 = language_class_name_from_physname (cu
->language_defn
,
19220 if (actual_name
!= NULL
)
19222 const char *die_name
= dwarf2_name (die
, cu
);
19224 if (die_name
!= NULL
19225 && strcmp (die_name
, actual_name
) != 0)
19227 /* Strip off the class name from the full name.
19228 We want the prefix. */
19229 int die_name_len
= strlen (die_name
);
19230 int actual_name_len
= strlen (actual_name
);
19232 /* Test for '::' as a sanity check. */
19233 if (actual_name_len
> die_name_len
+ 2
19234 && actual_name
[actual_name_len
19235 - die_name_len
- 1] == ':')
19236 name
= (char *) obstack_copy0 (
19237 &cu
->objfile
->per_bfd
->storage_obstack
,
19238 actual_name
, actual_name_len
- die_name_len
- 2);
19241 xfree (actual_name
);
19250 /* GCC might emit a nameless typedef that has a linkage name. Determine the
19251 prefix part in such case. See
19252 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
19255 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
19257 struct attribute
*attr
;
19260 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
19261 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
19264 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
19267 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
19269 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
19270 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
19273 /* dwarf2_name had to be already called. */
19274 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
19276 /* Strip the base name, keep any leading namespaces/classes. */
19277 base
= strrchr (DW_STRING (attr
), ':');
19278 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
19281 return (char *) obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
19283 &base
[-1] - DW_STRING (attr
));
19286 /* Return the name of the namespace/class that DIE is defined within,
19287 or "" if we can't tell. The caller should not xfree the result.
19289 For example, if we're within the method foo() in the following
19299 then determine_prefix on foo's die will return "N::C". */
19301 static const char *
19302 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
19304 struct die_info
*parent
, *spec_die
;
19305 struct dwarf2_cu
*spec_cu
;
19306 struct type
*parent_type
;
19309 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
19310 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
)
19313 retval
= anonymous_struct_prefix (die
, cu
);
19317 /* We have to be careful in the presence of DW_AT_specification.
19318 For example, with GCC 3.4, given the code
19322 // Definition of N::foo.
19326 then we'll have a tree of DIEs like this:
19328 1: DW_TAG_compile_unit
19329 2: DW_TAG_namespace // N
19330 3: DW_TAG_subprogram // declaration of N::foo
19331 4: DW_TAG_subprogram // definition of N::foo
19332 DW_AT_specification // refers to die #3
19334 Thus, when processing die #4, we have to pretend that we're in
19335 the context of its DW_AT_specification, namely the contex of die
19338 spec_die
= die_specification (die
, &spec_cu
);
19339 if (spec_die
== NULL
)
19340 parent
= die
->parent
;
19343 parent
= spec_die
->parent
;
19347 if (parent
== NULL
)
19349 else if (parent
->building_fullname
)
19352 const char *parent_name
;
19354 /* It has been seen on RealView 2.2 built binaries,
19355 DW_TAG_template_type_param types actually _defined_ as
19356 children of the parent class:
19359 template class <class Enum> Class{};
19360 Class<enum E> class_e;
19362 1: DW_TAG_class_type (Class)
19363 2: DW_TAG_enumeration_type (E)
19364 3: DW_TAG_enumerator (enum1:0)
19365 3: DW_TAG_enumerator (enum2:1)
19367 2: DW_TAG_template_type_param
19368 DW_AT_type DW_FORM_ref_udata (E)
19370 Besides being broken debug info, it can put GDB into an
19371 infinite loop. Consider:
19373 When we're building the full name for Class<E>, we'll start
19374 at Class, and go look over its template type parameters,
19375 finding E. We'll then try to build the full name of E, and
19376 reach here. We're now trying to build the full name of E,
19377 and look over the parent DIE for containing scope. In the
19378 broken case, if we followed the parent DIE of E, we'd again
19379 find Class, and once again go look at its template type
19380 arguments, etc., etc. Simply don't consider such parent die
19381 as source-level parent of this die (it can't be, the language
19382 doesn't allow it), and break the loop here. */
19383 name
= dwarf2_name (die
, cu
);
19384 parent_name
= dwarf2_name (parent
, cu
);
19385 complaint (&symfile_complaints
,
19386 _("template param type '%s' defined within parent '%s'"),
19387 name
? name
: "<unknown>",
19388 parent_name
? parent_name
: "<unknown>");
19392 switch (parent
->tag
)
19394 case DW_TAG_namespace
:
19395 parent_type
= read_type_die (parent
, cu
);
19396 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
19397 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
19398 Work around this problem here. */
19399 if (cu
->language
== language_cplus
19400 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
19402 /* We give a name to even anonymous namespaces. */
19403 return TYPE_TAG_NAME (parent_type
);
19404 case DW_TAG_class_type
:
19405 case DW_TAG_interface_type
:
19406 case DW_TAG_structure_type
:
19407 case DW_TAG_union_type
:
19408 case DW_TAG_module
:
19409 parent_type
= read_type_die (parent
, cu
);
19410 if (TYPE_TAG_NAME (parent_type
) != NULL
)
19411 return TYPE_TAG_NAME (parent_type
);
19413 /* An anonymous structure is only allowed non-static data
19414 members; no typedefs, no member functions, et cetera.
19415 So it does not need a prefix. */
19417 case DW_TAG_compile_unit
:
19418 case DW_TAG_partial_unit
:
19419 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
19420 if (cu
->language
== language_cplus
19421 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
19422 && die
->child
!= NULL
19423 && (die
->tag
== DW_TAG_class_type
19424 || die
->tag
== DW_TAG_structure_type
19425 || die
->tag
== DW_TAG_union_type
))
19427 char *name
= guess_full_die_structure_name (die
, cu
);
19432 case DW_TAG_enumeration_type
:
19433 parent_type
= read_type_die (parent
, cu
);
19434 if (TYPE_DECLARED_CLASS (parent_type
))
19436 if (TYPE_TAG_NAME (parent_type
) != NULL
)
19437 return TYPE_TAG_NAME (parent_type
);
19440 /* Fall through. */
19442 return determine_prefix (parent
, cu
);
19446 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
19447 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
19448 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
19449 an obconcat, otherwise allocate storage for the result. The CU argument is
19450 used to determine the language and hence, the appropriate separator. */
19452 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
19455 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
19456 int physname
, struct dwarf2_cu
*cu
)
19458 const char *lead
= "";
19461 if (suffix
== NULL
|| suffix
[0] == '\0'
19462 || prefix
== NULL
|| prefix
[0] == '\0')
19464 else if (cu
->language
== language_java
)
19466 else if (cu
->language
== language_d
)
19468 /* For D, the 'main' function could be defined in any module, but it
19469 should never be prefixed. */
19470 if (strcmp (suffix
, "D main") == 0)
19478 else if (cu
->language
== language_fortran
&& physname
)
19480 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
19481 DW_AT_MIPS_linkage_name is preferred and used instead. */
19489 if (prefix
== NULL
)
19491 if (suffix
== NULL
)
19498 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
19500 strcpy (retval
, lead
);
19501 strcat (retval
, prefix
);
19502 strcat (retval
, sep
);
19503 strcat (retval
, suffix
);
19508 /* We have an obstack. */
19509 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
19513 /* Return sibling of die, NULL if no sibling. */
19515 static struct die_info
*
19516 sibling_die (struct die_info
*die
)
19518 return die
->sibling
;
19521 /* Get name of a die, return NULL if not found. */
19523 static const char *
19524 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
19525 struct obstack
*obstack
)
19527 if (name
&& cu
->language
== language_cplus
)
19529 char *canon_name
= cp_canonicalize_string (name
);
19531 if (canon_name
!= NULL
)
19533 if (strcmp (canon_name
, name
) != 0)
19534 name
= (const char *) obstack_copy0 (obstack
, canon_name
,
19535 strlen (canon_name
));
19536 xfree (canon_name
);
19543 /* Get name of a die, return NULL if not found.
19544 Anonymous namespaces are converted to their magic string. */
19546 static const char *
19547 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19549 struct attribute
*attr
;
19551 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
19552 if ((!attr
|| !DW_STRING (attr
))
19553 && die
->tag
!= DW_TAG_namespace
19554 && die
->tag
!= DW_TAG_class_type
19555 && die
->tag
!= DW_TAG_interface_type
19556 && die
->tag
!= DW_TAG_structure_type
19557 && die
->tag
!= DW_TAG_union_type
)
19562 case DW_TAG_compile_unit
:
19563 case DW_TAG_partial_unit
:
19564 /* Compilation units have a DW_AT_name that is a filename, not
19565 a source language identifier. */
19566 case DW_TAG_enumeration_type
:
19567 case DW_TAG_enumerator
:
19568 /* These tags always have simple identifiers already; no need
19569 to canonicalize them. */
19570 return DW_STRING (attr
);
19572 case DW_TAG_namespace
:
19573 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
19574 return DW_STRING (attr
);
19575 return CP_ANONYMOUS_NAMESPACE_STR
;
19577 case DW_TAG_subprogram
:
19578 /* Java constructors will all be named "<init>", so return
19579 the class name when we see this special case. */
19580 if (cu
->language
== language_java
19581 && DW_STRING (attr
) != NULL
19582 && strcmp (DW_STRING (attr
), "<init>") == 0)
19584 struct dwarf2_cu
*spec_cu
= cu
;
19585 struct die_info
*spec_die
;
19587 /* GCJ will output '<init>' for Java constructor names.
19588 For this special case, return the name of the parent class. */
19590 /* GCJ may output subprogram DIEs with AT_specification set.
19591 If so, use the name of the specified DIE. */
19592 spec_die
= die_specification (die
, &spec_cu
);
19593 if (spec_die
!= NULL
)
19594 return dwarf2_name (spec_die
, spec_cu
);
19599 if (die
->tag
== DW_TAG_class_type
)
19600 return dwarf2_name (die
, cu
);
19602 while (die
->tag
!= DW_TAG_compile_unit
19603 && die
->tag
!= DW_TAG_partial_unit
);
19607 case DW_TAG_class_type
:
19608 case DW_TAG_interface_type
:
19609 case DW_TAG_structure_type
:
19610 case DW_TAG_union_type
:
19611 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
19612 structures or unions. These were of the form "._%d" in GCC 4.1,
19613 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
19614 and GCC 4.4. We work around this problem by ignoring these. */
19615 if (attr
&& DW_STRING (attr
)
19616 && (startswith (DW_STRING (attr
), "._")
19617 || startswith (DW_STRING (attr
), "<anonymous")))
19620 /* GCC might emit a nameless typedef that has a linkage name. See
19621 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
19622 if (!attr
|| DW_STRING (attr
) == NULL
)
19624 char *demangled
= NULL
;
19626 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
19628 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
19630 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
19633 /* Avoid demangling DW_STRING (attr) the second time on a second
19634 call for the same DIE. */
19635 if (!DW_STRING_IS_CANONICAL (attr
))
19636 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
19642 /* FIXME: we already did this for the partial symbol... */
19645 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
19646 demangled
, strlen (demangled
)));
19647 DW_STRING_IS_CANONICAL (attr
) = 1;
19650 /* Strip any leading namespaces/classes, keep only the base name.
19651 DW_AT_name for named DIEs does not contain the prefixes. */
19652 base
= strrchr (DW_STRING (attr
), ':');
19653 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
19656 return DW_STRING (attr
);
19665 if (!DW_STRING_IS_CANONICAL (attr
))
19668 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
19669 &cu
->objfile
->per_bfd
->storage_obstack
);
19670 DW_STRING_IS_CANONICAL (attr
) = 1;
19672 return DW_STRING (attr
);
19675 /* Return the die that this die in an extension of, or NULL if there
19676 is none. *EXT_CU is the CU containing DIE on input, and the CU
19677 containing the return value on output. */
19679 static struct die_info
*
19680 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
19682 struct attribute
*attr
;
19684 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
19688 return follow_die_ref (die
, attr
, ext_cu
);
19691 /* Convert a DIE tag into its string name. */
19693 static const char *
19694 dwarf_tag_name (unsigned tag
)
19696 const char *name
= get_DW_TAG_name (tag
);
19699 return "DW_TAG_<unknown>";
19704 /* Convert a DWARF attribute code into its string name. */
19706 static const char *
19707 dwarf_attr_name (unsigned attr
)
19711 #ifdef MIPS /* collides with DW_AT_HP_block_index */
19712 if (attr
== DW_AT_MIPS_fde
)
19713 return "DW_AT_MIPS_fde";
19715 if (attr
== DW_AT_HP_block_index
)
19716 return "DW_AT_HP_block_index";
19719 name
= get_DW_AT_name (attr
);
19722 return "DW_AT_<unknown>";
19727 /* Convert a DWARF value form code into its string name. */
19729 static const char *
19730 dwarf_form_name (unsigned form
)
19732 const char *name
= get_DW_FORM_name (form
);
19735 return "DW_FORM_<unknown>";
19741 dwarf_bool_name (unsigned mybool
)
19749 /* Convert a DWARF type code into its string name. */
19751 static const char *
19752 dwarf_type_encoding_name (unsigned enc
)
19754 const char *name
= get_DW_ATE_name (enc
);
19757 return "DW_ATE_<unknown>";
19763 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
19767 print_spaces (indent
, f
);
19768 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
19769 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
.sect_off
);
19771 if (die
->parent
!= NULL
)
19773 print_spaces (indent
, f
);
19774 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
19775 die
->parent
->offset
.sect_off
);
19778 print_spaces (indent
, f
);
19779 fprintf_unfiltered (f
, " has children: %s\n",
19780 dwarf_bool_name (die
->child
!= NULL
));
19782 print_spaces (indent
, f
);
19783 fprintf_unfiltered (f
, " attributes:\n");
19785 for (i
= 0; i
< die
->num_attrs
; ++i
)
19787 print_spaces (indent
, f
);
19788 fprintf_unfiltered (f
, " %s (%s) ",
19789 dwarf_attr_name (die
->attrs
[i
].name
),
19790 dwarf_form_name (die
->attrs
[i
].form
));
19792 switch (die
->attrs
[i
].form
)
19795 case DW_FORM_GNU_addr_index
:
19796 fprintf_unfiltered (f
, "address: ");
19797 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
19799 case DW_FORM_block2
:
19800 case DW_FORM_block4
:
19801 case DW_FORM_block
:
19802 case DW_FORM_block1
:
19803 fprintf_unfiltered (f
, "block: size %s",
19804 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
19806 case DW_FORM_exprloc
:
19807 fprintf_unfiltered (f
, "expression: size %s",
19808 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
19810 case DW_FORM_ref_addr
:
19811 fprintf_unfiltered (f
, "ref address: ");
19812 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
19814 case DW_FORM_GNU_ref_alt
:
19815 fprintf_unfiltered (f
, "alt ref address: ");
19816 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
19822 case DW_FORM_ref_udata
:
19823 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
19824 (long) (DW_UNSND (&die
->attrs
[i
])));
19826 case DW_FORM_data1
:
19827 case DW_FORM_data2
:
19828 case DW_FORM_data4
:
19829 case DW_FORM_data8
:
19830 case DW_FORM_udata
:
19831 case DW_FORM_sdata
:
19832 fprintf_unfiltered (f
, "constant: %s",
19833 pulongest (DW_UNSND (&die
->attrs
[i
])));
19835 case DW_FORM_sec_offset
:
19836 fprintf_unfiltered (f
, "section offset: %s",
19837 pulongest (DW_UNSND (&die
->attrs
[i
])));
19839 case DW_FORM_ref_sig8
:
19840 fprintf_unfiltered (f
, "signature: %s",
19841 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
19843 case DW_FORM_string
:
19845 case DW_FORM_GNU_str_index
:
19846 case DW_FORM_GNU_strp_alt
:
19847 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
19848 DW_STRING (&die
->attrs
[i
])
19849 ? DW_STRING (&die
->attrs
[i
]) : "",
19850 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
19853 if (DW_UNSND (&die
->attrs
[i
]))
19854 fprintf_unfiltered (f
, "flag: TRUE");
19856 fprintf_unfiltered (f
, "flag: FALSE");
19858 case DW_FORM_flag_present
:
19859 fprintf_unfiltered (f
, "flag: TRUE");
19861 case DW_FORM_indirect
:
19862 /* The reader will have reduced the indirect form to
19863 the "base form" so this form should not occur. */
19864 fprintf_unfiltered (f
,
19865 "unexpected attribute form: DW_FORM_indirect");
19868 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
19869 die
->attrs
[i
].form
);
19872 fprintf_unfiltered (f
, "\n");
19877 dump_die_for_error (struct die_info
*die
)
19879 dump_die_shallow (gdb_stderr
, 0, die
);
19883 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
19885 int indent
= level
* 4;
19887 gdb_assert (die
!= NULL
);
19889 if (level
>= max_level
)
19892 dump_die_shallow (f
, indent
, die
);
19894 if (die
->child
!= NULL
)
19896 print_spaces (indent
, f
);
19897 fprintf_unfiltered (f
, " Children:");
19898 if (level
+ 1 < max_level
)
19900 fprintf_unfiltered (f
, "\n");
19901 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
19905 fprintf_unfiltered (f
,
19906 " [not printed, max nesting level reached]\n");
19910 if (die
->sibling
!= NULL
&& level
> 0)
19912 dump_die_1 (f
, level
, max_level
, die
->sibling
);
19916 /* This is called from the pdie macro in gdbinit.in.
19917 It's not static so gcc will keep a copy callable from gdb. */
19920 dump_die (struct die_info
*die
, int max_level
)
19922 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
19926 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
19930 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
.sect_off
,
19936 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
19940 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
19942 sect_offset retval
= { DW_UNSND (attr
) };
19944 if (attr_form_is_ref (attr
))
19947 retval
.sect_off
= 0;
19948 complaint (&symfile_complaints
,
19949 _("unsupported die ref attribute form: '%s'"),
19950 dwarf_form_name (attr
->form
));
19954 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
19955 * the value held by the attribute is not constant. */
19958 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
19960 if (attr
->form
== DW_FORM_sdata
)
19961 return DW_SND (attr
);
19962 else if (attr
->form
== DW_FORM_udata
19963 || attr
->form
== DW_FORM_data1
19964 || attr
->form
== DW_FORM_data2
19965 || attr
->form
== DW_FORM_data4
19966 || attr
->form
== DW_FORM_data8
)
19967 return DW_UNSND (attr
);
19970 complaint (&symfile_complaints
,
19971 _("Attribute value is not a constant (%s)"),
19972 dwarf_form_name (attr
->form
));
19973 return default_value
;
19977 /* Follow reference or signature attribute ATTR of SRC_DIE.
19978 On entry *REF_CU is the CU of SRC_DIE.
19979 On exit *REF_CU is the CU of the result. */
19981 static struct die_info
*
19982 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
19983 struct dwarf2_cu
**ref_cu
)
19985 struct die_info
*die
;
19987 if (attr_form_is_ref (attr
))
19988 die
= follow_die_ref (src_die
, attr
, ref_cu
);
19989 else if (attr
->form
== DW_FORM_ref_sig8
)
19990 die
= follow_die_sig (src_die
, attr
, ref_cu
);
19993 dump_die_for_error (src_die
);
19994 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
19995 objfile_name ((*ref_cu
)->objfile
));
20001 /* Follow reference OFFSET.
20002 On entry *REF_CU is the CU of the source die referencing OFFSET.
20003 On exit *REF_CU is the CU of the result.
20004 Returns NULL if OFFSET is invalid. */
20006 static struct die_info
*
20007 follow_die_offset (sect_offset offset
, int offset_in_dwz
,
20008 struct dwarf2_cu
**ref_cu
)
20010 struct die_info temp_die
;
20011 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
20013 gdb_assert (cu
->per_cu
!= NULL
);
20017 if (cu
->per_cu
->is_debug_types
)
20019 /* .debug_types CUs cannot reference anything outside their CU.
20020 If they need to, they have to reference a signatured type via
20021 DW_FORM_ref_sig8. */
20022 if (! offset_in_cu_p (&cu
->header
, offset
))
20025 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
20026 || ! offset_in_cu_p (&cu
->header
, offset
))
20028 struct dwarf2_per_cu_data
*per_cu
;
20030 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
20033 /* If necessary, add it to the queue and load its DIEs. */
20034 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
20035 load_full_comp_unit (per_cu
, cu
->language
);
20037 target_cu
= per_cu
->cu
;
20039 else if (cu
->dies
== NULL
)
20041 /* We're loading full DIEs during partial symbol reading. */
20042 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
20043 load_full_comp_unit (cu
->per_cu
, language_minimal
);
20046 *ref_cu
= target_cu
;
20047 temp_die
.offset
= offset
;
20048 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
20049 &temp_die
, offset
.sect_off
);
20052 /* Follow reference attribute ATTR of SRC_DIE.
20053 On entry *REF_CU is the CU of SRC_DIE.
20054 On exit *REF_CU is the CU of the result. */
20056 static struct die_info
*
20057 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
20058 struct dwarf2_cu
**ref_cu
)
20060 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
20061 struct dwarf2_cu
*cu
= *ref_cu
;
20062 struct die_info
*die
;
20064 die
= follow_die_offset (offset
,
20065 (attr
->form
== DW_FORM_GNU_ref_alt
20066 || cu
->per_cu
->is_dwz
),
20069 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
20070 "at 0x%x [in module %s]"),
20071 offset
.sect_off
, src_die
->offset
.sect_off
,
20072 objfile_name (cu
->objfile
));
20077 /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU.
20078 Returned value is intended for DW_OP_call*. Returned
20079 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
20081 struct dwarf2_locexpr_baton
20082 dwarf2_fetch_die_loc_sect_off (sect_offset offset
,
20083 struct dwarf2_per_cu_data
*per_cu
,
20084 CORE_ADDR (*get_frame_pc
) (void *baton
),
20087 struct dwarf2_cu
*cu
;
20088 struct die_info
*die
;
20089 struct attribute
*attr
;
20090 struct dwarf2_locexpr_baton retval
;
20092 dw2_setup (per_cu
->objfile
);
20094 if (per_cu
->cu
== NULL
)
20099 /* We shouldn't get here for a dummy CU, but don't crash on the user.
20100 Instead just throw an error, not much else we can do. */
20101 error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"),
20102 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20105 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
20107 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
20108 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20110 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
20113 /* DWARF: "If there is no such attribute, then there is no effect.".
20114 DATA is ignored if SIZE is 0. */
20116 retval
.data
= NULL
;
20119 else if (attr_form_is_section_offset (attr
))
20121 struct dwarf2_loclist_baton loclist_baton
;
20122 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
20125 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
20127 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
20129 retval
.size
= size
;
20133 if (!attr_form_is_block (attr
))
20134 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
20135 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
20136 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20138 retval
.data
= DW_BLOCK (attr
)->data
;
20139 retval
.size
= DW_BLOCK (attr
)->size
;
20141 retval
.per_cu
= cu
->per_cu
;
20143 age_cached_comp_units ();
20148 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
20151 struct dwarf2_locexpr_baton
20152 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
20153 struct dwarf2_per_cu_data
*per_cu
,
20154 CORE_ADDR (*get_frame_pc
) (void *baton
),
20157 sect_offset offset
= { per_cu
->offset
.sect_off
+ offset_in_cu
.cu_off
};
20159 return dwarf2_fetch_die_loc_sect_off (offset
, per_cu
, get_frame_pc
, baton
);
20162 /* Write a constant of a given type as target-ordered bytes into
20165 static const gdb_byte
*
20166 write_constant_as_bytes (struct obstack
*obstack
,
20167 enum bfd_endian byte_order
,
20174 *len
= TYPE_LENGTH (type
);
20175 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
20176 store_unsigned_integer (result
, *len
, byte_order
, value
);
20181 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
20182 pointer to the constant bytes and set LEN to the length of the
20183 data. If memory is needed, allocate it on OBSTACK. If the DIE
20184 does not have a DW_AT_const_value, return NULL. */
20187 dwarf2_fetch_constant_bytes (sect_offset offset
,
20188 struct dwarf2_per_cu_data
*per_cu
,
20189 struct obstack
*obstack
,
20192 struct dwarf2_cu
*cu
;
20193 struct die_info
*die
;
20194 struct attribute
*attr
;
20195 const gdb_byte
*result
= NULL
;
20198 enum bfd_endian byte_order
;
20200 dw2_setup (per_cu
->objfile
);
20202 if (per_cu
->cu
== NULL
)
20207 /* We shouldn't get here for a dummy CU, but don't crash on the user.
20208 Instead just throw an error, not much else we can do. */
20209 error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"),
20210 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20213 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
20215 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
20216 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20219 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20223 byte_order
= (bfd_big_endian (per_cu
->objfile
->obfd
)
20224 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
20226 switch (attr
->form
)
20229 case DW_FORM_GNU_addr_index
:
20233 *len
= cu
->header
.addr_size
;
20234 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
20235 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
20239 case DW_FORM_string
:
20241 case DW_FORM_GNU_str_index
:
20242 case DW_FORM_GNU_strp_alt
:
20243 /* DW_STRING is already allocated on the objfile obstack, point
20245 result
= (const gdb_byte
*) DW_STRING (attr
);
20246 *len
= strlen (DW_STRING (attr
));
20248 case DW_FORM_block1
:
20249 case DW_FORM_block2
:
20250 case DW_FORM_block4
:
20251 case DW_FORM_block
:
20252 case DW_FORM_exprloc
:
20253 result
= DW_BLOCK (attr
)->data
;
20254 *len
= DW_BLOCK (attr
)->size
;
20257 /* The DW_AT_const_value attributes are supposed to carry the
20258 symbol's value "represented as it would be on the target
20259 architecture." By the time we get here, it's already been
20260 converted to host endianness, so we just need to sign- or
20261 zero-extend it as appropriate. */
20262 case DW_FORM_data1
:
20263 type
= die_type (die
, cu
);
20264 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
20265 if (result
== NULL
)
20266 result
= write_constant_as_bytes (obstack
, byte_order
,
20269 case DW_FORM_data2
:
20270 type
= die_type (die
, cu
);
20271 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
20272 if (result
== NULL
)
20273 result
= write_constant_as_bytes (obstack
, byte_order
,
20276 case DW_FORM_data4
:
20277 type
= die_type (die
, cu
);
20278 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
20279 if (result
== NULL
)
20280 result
= write_constant_as_bytes (obstack
, byte_order
,
20283 case DW_FORM_data8
:
20284 type
= die_type (die
, cu
);
20285 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
20286 if (result
== NULL
)
20287 result
= write_constant_as_bytes (obstack
, byte_order
,
20291 case DW_FORM_sdata
:
20292 type
= die_type (die
, cu
);
20293 result
= write_constant_as_bytes (obstack
, byte_order
,
20294 type
, DW_SND (attr
), len
);
20297 case DW_FORM_udata
:
20298 type
= die_type (die
, cu
);
20299 result
= write_constant_as_bytes (obstack
, byte_order
,
20300 type
, DW_UNSND (attr
), len
);
20304 complaint (&symfile_complaints
,
20305 _("unsupported const value attribute form: '%s'"),
20306 dwarf_form_name (attr
->form
));
20313 /* Return the type of the DIE at DIE_OFFSET in the CU named by
20317 dwarf2_get_die_type (cu_offset die_offset
,
20318 struct dwarf2_per_cu_data
*per_cu
)
20320 sect_offset die_offset_sect
;
20322 dw2_setup (per_cu
->objfile
);
20324 die_offset_sect
.sect_off
= per_cu
->offset
.sect_off
+ die_offset
.cu_off
;
20325 return get_die_type_at_offset (die_offset_sect
, per_cu
);
20328 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
20329 On entry *REF_CU is the CU of SRC_DIE.
20330 On exit *REF_CU is the CU of the result.
20331 Returns NULL if the referenced DIE isn't found. */
20333 static struct die_info
*
20334 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
20335 struct dwarf2_cu
**ref_cu
)
20337 struct objfile
*objfile
= (*ref_cu
)->objfile
;
20338 struct die_info temp_die
;
20339 struct dwarf2_cu
*sig_cu
;
20340 struct die_info
*die
;
20342 /* While it might be nice to assert sig_type->type == NULL here,
20343 we can get here for DW_AT_imported_declaration where we need
20344 the DIE not the type. */
20346 /* If necessary, add it to the queue and load its DIEs. */
20348 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
20349 read_signatured_type (sig_type
);
20351 sig_cu
= sig_type
->per_cu
.cu
;
20352 gdb_assert (sig_cu
!= NULL
);
20353 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
20354 temp_die
.offset
= sig_type
->type_offset_in_section
;
20355 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
20356 temp_die
.offset
.sect_off
);
20359 /* For .gdb_index version 7 keep track of included TUs.
20360 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
20361 if (dwarf2_per_objfile
->index_table
!= NULL
20362 && dwarf2_per_objfile
->index_table
->version
<= 7)
20364 VEC_safe_push (dwarf2_per_cu_ptr
,
20365 (*ref_cu
)->per_cu
->imported_symtabs
,
20376 /* Follow signatured type referenced by ATTR in SRC_DIE.
20377 On entry *REF_CU is the CU of SRC_DIE.
20378 On exit *REF_CU is the CU of the result.
20379 The result is the DIE of the type.
20380 If the referenced type cannot be found an error is thrown. */
20382 static struct die_info
*
20383 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
20384 struct dwarf2_cu
**ref_cu
)
20386 ULONGEST signature
= DW_SIGNATURE (attr
);
20387 struct signatured_type
*sig_type
;
20388 struct die_info
*die
;
20390 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
20392 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
20393 /* sig_type will be NULL if the signatured type is missing from
20395 if (sig_type
== NULL
)
20397 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
20398 " from DIE at 0x%x [in module %s]"),
20399 hex_string (signature
), src_die
->offset
.sect_off
,
20400 objfile_name ((*ref_cu
)->objfile
));
20403 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
20406 dump_die_for_error (src_die
);
20407 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
20408 " from DIE at 0x%x [in module %s]"),
20409 hex_string (signature
), src_die
->offset
.sect_off
,
20410 objfile_name ((*ref_cu
)->objfile
));
20416 /* Get the type specified by SIGNATURE referenced in DIE/CU,
20417 reading in and processing the type unit if necessary. */
20419 static struct type
*
20420 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
20421 struct dwarf2_cu
*cu
)
20423 struct signatured_type
*sig_type
;
20424 struct dwarf2_cu
*type_cu
;
20425 struct die_info
*type_die
;
20428 sig_type
= lookup_signatured_type (cu
, signature
);
20429 /* sig_type will be NULL if the signatured type is missing from
20431 if (sig_type
== NULL
)
20433 complaint (&symfile_complaints
,
20434 _("Dwarf Error: Cannot find signatured DIE %s referenced"
20435 " from DIE at 0x%x [in module %s]"),
20436 hex_string (signature
), die
->offset
.sect_off
,
20437 objfile_name (dwarf2_per_objfile
->objfile
));
20438 return build_error_marker_type (cu
, die
);
20441 /* If we already know the type we're done. */
20442 if (sig_type
->type
!= NULL
)
20443 return sig_type
->type
;
20446 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
20447 if (type_die
!= NULL
)
20449 /* N.B. We need to call get_die_type to ensure only one type for this DIE
20450 is created. This is important, for example, because for c++ classes
20451 we need TYPE_NAME set which is only done by new_symbol. Blech. */
20452 type
= read_type_die (type_die
, type_cu
);
20455 complaint (&symfile_complaints
,
20456 _("Dwarf Error: Cannot build signatured type %s"
20457 " referenced from DIE at 0x%x [in module %s]"),
20458 hex_string (signature
), die
->offset
.sect_off
,
20459 objfile_name (dwarf2_per_objfile
->objfile
));
20460 type
= build_error_marker_type (cu
, die
);
20465 complaint (&symfile_complaints
,
20466 _("Dwarf Error: Problem reading signatured DIE %s referenced"
20467 " from DIE at 0x%x [in module %s]"),
20468 hex_string (signature
), die
->offset
.sect_off
,
20469 objfile_name (dwarf2_per_objfile
->objfile
));
20470 type
= build_error_marker_type (cu
, die
);
20472 sig_type
->type
= type
;
20477 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
20478 reading in and processing the type unit if necessary. */
20480 static struct type
*
20481 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
20482 struct dwarf2_cu
*cu
) /* ARI: editCase function */
20484 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
20485 if (attr_form_is_ref (attr
))
20487 struct dwarf2_cu
*type_cu
= cu
;
20488 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
20490 return read_type_die (type_die
, type_cu
);
20492 else if (attr
->form
== DW_FORM_ref_sig8
)
20494 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
20498 complaint (&symfile_complaints
,
20499 _("Dwarf Error: DW_AT_signature has bad form %s in DIE"
20500 " at 0x%x [in module %s]"),
20501 dwarf_form_name (attr
->form
), die
->offset
.sect_off
,
20502 objfile_name (dwarf2_per_objfile
->objfile
));
20503 return build_error_marker_type (cu
, die
);
20507 /* Load the DIEs associated with type unit PER_CU into memory. */
20510 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
20512 struct signatured_type
*sig_type
;
20514 /* Caller is responsible for ensuring type_unit_groups don't get here. */
20515 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
20517 /* We have the per_cu, but we need the signatured_type.
20518 Fortunately this is an easy translation. */
20519 gdb_assert (per_cu
->is_debug_types
);
20520 sig_type
= (struct signatured_type
*) per_cu
;
20522 gdb_assert (per_cu
->cu
== NULL
);
20524 read_signatured_type (sig_type
);
20526 gdb_assert (per_cu
->cu
!= NULL
);
20529 /* die_reader_func for read_signatured_type.
20530 This is identical to load_full_comp_unit_reader,
20531 but is kept separate for now. */
20534 read_signatured_type_reader (const struct die_reader_specs
*reader
,
20535 const gdb_byte
*info_ptr
,
20536 struct die_info
*comp_unit_die
,
20540 struct dwarf2_cu
*cu
= reader
->cu
;
20542 gdb_assert (cu
->die_hash
== NULL
);
20544 htab_create_alloc_ex (cu
->header
.length
/ 12,
20548 &cu
->comp_unit_obstack
,
20549 hashtab_obstack_allocate
,
20550 dummy_obstack_deallocate
);
20553 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
20554 &info_ptr
, comp_unit_die
);
20555 cu
->dies
= comp_unit_die
;
20556 /* comp_unit_die is not stored in die_hash, no need. */
20558 /* We try not to read any attributes in this function, because not
20559 all CUs needed for references have been loaded yet, and symbol
20560 table processing isn't initialized. But we have to set the CU language,
20561 or we won't be able to build types correctly.
20562 Similarly, if we do not read the producer, we can not apply
20563 producer-specific interpretation. */
20564 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
20567 /* Read in a signatured type and build its CU and DIEs.
20568 If the type is a stub for the real type in a DWO file,
20569 read in the real type from the DWO file as well. */
20572 read_signatured_type (struct signatured_type
*sig_type
)
20574 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
20576 gdb_assert (per_cu
->is_debug_types
);
20577 gdb_assert (per_cu
->cu
== NULL
);
20579 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
20580 read_signatured_type_reader
, NULL
);
20581 sig_type
->per_cu
.tu_read
= 1;
20584 /* Decode simple location descriptions.
20585 Given a pointer to a dwarf block that defines a location, compute
20586 the location and return the value.
20588 NOTE drow/2003-11-18: This function is called in two situations
20589 now: for the address of static or global variables (partial symbols
20590 only) and for offsets into structures which are expected to be
20591 (more or less) constant. The partial symbol case should go away,
20592 and only the constant case should remain. That will let this
20593 function complain more accurately. A few special modes are allowed
20594 without complaint for global variables (for instance, global
20595 register values and thread-local values).
20597 A location description containing no operations indicates that the
20598 object is optimized out. The return value is 0 for that case.
20599 FIXME drow/2003-11-16: No callers check for this case any more; soon all
20600 callers will only want a very basic result and this can become a
20603 Note that stack[0] is unused except as a default error return. */
20606 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
20608 struct objfile
*objfile
= cu
->objfile
;
20610 size_t size
= blk
->size
;
20611 const gdb_byte
*data
= blk
->data
;
20612 CORE_ADDR stack
[64];
20614 unsigned int bytes_read
, unsnd
;
20620 stack
[++stacki
] = 0;
20659 stack
[++stacki
] = op
- DW_OP_lit0
;
20694 stack
[++stacki
] = op
- DW_OP_reg0
;
20696 dwarf2_complex_location_expr_complaint ();
20700 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
20702 stack
[++stacki
] = unsnd
;
20704 dwarf2_complex_location_expr_complaint ();
20708 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
20713 case DW_OP_const1u
:
20714 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
20718 case DW_OP_const1s
:
20719 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
20723 case DW_OP_const2u
:
20724 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
20728 case DW_OP_const2s
:
20729 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
20733 case DW_OP_const4u
:
20734 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
20738 case DW_OP_const4s
:
20739 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
20743 case DW_OP_const8u
:
20744 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
20749 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
20755 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
20760 stack
[stacki
+ 1] = stack
[stacki
];
20765 stack
[stacki
- 1] += stack
[stacki
];
20769 case DW_OP_plus_uconst
:
20770 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
20776 stack
[stacki
- 1] -= stack
[stacki
];
20781 /* If we're not the last op, then we definitely can't encode
20782 this using GDB's address_class enum. This is valid for partial
20783 global symbols, although the variable's address will be bogus
20786 dwarf2_complex_location_expr_complaint ();
20789 case DW_OP_GNU_push_tls_address
:
20790 /* The top of the stack has the offset from the beginning
20791 of the thread control block at which the variable is located. */
20792 /* Nothing should follow this operator, so the top of stack would
20794 /* This is valid for partial global symbols, but the variable's
20795 address will be bogus in the psymtab. Make it always at least
20796 non-zero to not look as a variable garbage collected by linker
20797 which have DW_OP_addr 0. */
20799 dwarf2_complex_location_expr_complaint ();
20803 case DW_OP_GNU_uninit
:
20806 case DW_OP_GNU_addr_index
:
20807 case DW_OP_GNU_const_index
:
20808 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
20815 const char *name
= get_DW_OP_name (op
);
20818 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
20821 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
20825 return (stack
[stacki
]);
20828 /* Enforce maximum stack depth of SIZE-1 to avoid writing
20829 outside of the allocated space. Also enforce minimum>0. */
20830 if (stacki
>= ARRAY_SIZE (stack
) - 1)
20832 complaint (&symfile_complaints
,
20833 _("location description stack overflow"));
20839 complaint (&symfile_complaints
,
20840 _("location description stack underflow"));
20844 return (stack
[stacki
]);
20847 /* memory allocation interface */
20849 static struct dwarf_block
*
20850 dwarf_alloc_block (struct dwarf2_cu
*cu
)
20852 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
20855 static struct die_info
*
20856 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
20858 struct die_info
*die
;
20859 size_t size
= sizeof (struct die_info
);
20862 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
20864 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
20865 memset (die
, 0, sizeof (struct die_info
));
20870 /* Macro support. */
20872 /* Return file name relative to the compilation directory of file number I in
20873 *LH's file name table. The result is allocated using xmalloc; the caller is
20874 responsible for freeing it. */
20877 file_file_name (int file
, struct line_header
*lh
)
20879 /* Is the file number a valid index into the line header's file name
20880 table? Remember that file numbers start with one, not zero. */
20881 if (1 <= file
&& file
<= lh
->num_file_names
)
20883 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
20885 if (IS_ABSOLUTE_PATH (fe
->name
) || fe
->dir_index
== 0
20886 || lh
->include_dirs
== NULL
)
20887 return xstrdup (fe
->name
);
20888 return concat (lh
->include_dirs
[fe
->dir_index
- 1], SLASH_STRING
,
20889 fe
->name
, (char *) NULL
);
20893 /* The compiler produced a bogus file number. We can at least
20894 record the macro definitions made in the file, even if we
20895 won't be able to find the file by name. */
20896 char fake_name
[80];
20898 xsnprintf (fake_name
, sizeof (fake_name
),
20899 "<bad macro file number %d>", file
);
20901 complaint (&symfile_complaints
,
20902 _("bad file number in macro information (%d)"),
20905 return xstrdup (fake_name
);
20909 /* Return the full name of file number I in *LH's file name table.
20910 Use COMP_DIR as the name of the current directory of the
20911 compilation. The result is allocated using xmalloc; the caller is
20912 responsible for freeing it. */
20914 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
20916 /* Is the file number a valid index into the line header's file name
20917 table? Remember that file numbers start with one, not zero. */
20918 if (1 <= file
&& file
<= lh
->num_file_names
)
20920 char *relative
= file_file_name (file
, lh
);
20922 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
20924 return reconcat (relative
, comp_dir
, SLASH_STRING
,
20925 relative
, (char *) NULL
);
20928 return file_file_name (file
, lh
);
20932 static struct macro_source_file
*
20933 macro_start_file (int file
, int line
,
20934 struct macro_source_file
*current_file
,
20935 struct line_header
*lh
)
20937 /* File name relative to the compilation directory of this source file. */
20938 char *file_name
= file_file_name (file
, lh
);
20940 if (! current_file
)
20942 /* Note: We don't create a macro table for this compilation unit
20943 at all until we actually get a filename. */
20944 struct macro_table
*macro_table
= get_macro_table ();
20946 /* If we have no current file, then this must be the start_file
20947 directive for the compilation unit's main source file. */
20948 current_file
= macro_set_main (macro_table
, file_name
);
20949 macro_define_special (macro_table
);
20952 current_file
= macro_include (current_file
, line
, file_name
);
20956 return current_file
;
20960 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
20961 followed by a null byte. */
20963 copy_string (const char *buf
, int len
)
20965 char *s
= (char *) xmalloc (len
+ 1);
20967 memcpy (s
, buf
, len
);
20973 static const char *
20974 consume_improper_spaces (const char *p
, const char *body
)
20978 complaint (&symfile_complaints
,
20979 _("macro definition contains spaces "
20980 "in formal argument list:\n`%s'"),
20992 parse_macro_definition (struct macro_source_file
*file
, int line
,
20997 /* The body string takes one of two forms. For object-like macro
20998 definitions, it should be:
21000 <macro name> " " <definition>
21002 For function-like macro definitions, it should be:
21004 <macro name> "() " <definition>
21006 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
21008 Spaces may appear only where explicitly indicated, and in the
21011 The Dwarf 2 spec says that an object-like macro's name is always
21012 followed by a space, but versions of GCC around March 2002 omit
21013 the space when the macro's definition is the empty string.
21015 The Dwarf 2 spec says that there should be no spaces between the
21016 formal arguments in a function-like macro's formal argument list,
21017 but versions of GCC around March 2002 include spaces after the
21021 /* Find the extent of the macro name. The macro name is terminated
21022 by either a space or null character (for an object-like macro) or
21023 an opening paren (for a function-like macro). */
21024 for (p
= body
; *p
; p
++)
21025 if (*p
== ' ' || *p
== '(')
21028 if (*p
== ' ' || *p
== '\0')
21030 /* It's an object-like macro. */
21031 int name_len
= p
- body
;
21032 char *name
= copy_string (body
, name_len
);
21033 const char *replacement
;
21036 replacement
= body
+ name_len
+ 1;
21039 dwarf2_macro_malformed_definition_complaint (body
);
21040 replacement
= body
+ name_len
;
21043 macro_define_object (file
, line
, name
, replacement
);
21047 else if (*p
== '(')
21049 /* It's a function-like macro. */
21050 char *name
= copy_string (body
, p
- body
);
21053 char **argv
= XNEWVEC (char *, argv_size
);
21057 p
= consume_improper_spaces (p
, body
);
21059 /* Parse the formal argument list. */
21060 while (*p
&& *p
!= ')')
21062 /* Find the extent of the current argument name. */
21063 const char *arg_start
= p
;
21065 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
21068 if (! *p
|| p
== arg_start
)
21069 dwarf2_macro_malformed_definition_complaint (body
);
21072 /* Make sure argv has room for the new argument. */
21073 if (argc
>= argv_size
)
21076 argv
= XRESIZEVEC (char *, argv
, argv_size
);
21079 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
21082 p
= consume_improper_spaces (p
, body
);
21084 /* Consume the comma, if present. */
21089 p
= consume_improper_spaces (p
, body
);
21098 /* Perfectly formed definition, no complaints. */
21099 macro_define_function (file
, line
, name
,
21100 argc
, (const char **) argv
,
21102 else if (*p
== '\0')
21104 /* Complain, but do define it. */
21105 dwarf2_macro_malformed_definition_complaint (body
);
21106 macro_define_function (file
, line
, name
,
21107 argc
, (const char **) argv
,
21111 /* Just complain. */
21112 dwarf2_macro_malformed_definition_complaint (body
);
21115 /* Just complain. */
21116 dwarf2_macro_malformed_definition_complaint (body
);
21122 for (i
= 0; i
< argc
; i
++)
21128 dwarf2_macro_malformed_definition_complaint (body
);
21131 /* Skip some bytes from BYTES according to the form given in FORM.
21132 Returns the new pointer. */
21134 static const gdb_byte
*
21135 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
21136 enum dwarf_form form
,
21137 unsigned int offset_size
,
21138 struct dwarf2_section_info
*section
)
21140 unsigned int bytes_read
;
21144 case DW_FORM_data1
:
21149 case DW_FORM_data2
:
21153 case DW_FORM_data4
:
21157 case DW_FORM_data8
:
21161 case DW_FORM_string
:
21162 read_direct_string (abfd
, bytes
, &bytes_read
);
21163 bytes
+= bytes_read
;
21166 case DW_FORM_sec_offset
:
21168 case DW_FORM_GNU_strp_alt
:
21169 bytes
+= offset_size
;
21172 case DW_FORM_block
:
21173 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
21174 bytes
+= bytes_read
;
21177 case DW_FORM_block1
:
21178 bytes
+= 1 + read_1_byte (abfd
, bytes
);
21180 case DW_FORM_block2
:
21181 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
21183 case DW_FORM_block4
:
21184 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
21187 case DW_FORM_sdata
:
21188 case DW_FORM_udata
:
21189 case DW_FORM_GNU_addr_index
:
21190 case DW_FORM_GNU_str_index
:
21191 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
21194 dwarf2_section_buffer_overflow_complaint (section
);
21202 complaint (&symfile_complaints
,
21203 _("invalid form 0x%x in `%s'"),
21204 form
, get_section_name (section
));
21212 /* A helper for dwarf_decode_macros that handles skipping an unknown
21213 opcode. Returns an updated pointer to the macro data buffer; or,
21214 on error, issues a complaint and returns NULL. */
21216 static const gdb_byte
*
21217 skip_unknown_opcode (unsigned int opcode
,
21218 const gdb_byte
**opcode_definitions
,
21219 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
21221 unsigned int offset_size
,
21222 struct dwarf2_section_info
*section
)
21224 unsigned int bytes_read
, i
;
21226 const gdb_byte
*defn
;
21228 if (opcode_definitions
[opcode
] == NULL
)
21230 complaint (&symfile_complaints
,
21231 _("unrecognized DW_MACFINO opcode 0x%x"),
21236 defn
= opcode_definitions
[opcode
];
21237 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
21238 defn
+= bytes_read
;
21240 for (i
= 0; i
< arg
; ++i
)
21242 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
,
21243 (enum dwarf_form
) defn
[i
], offset_size
,
21245 if (mac_ptr
== NULL
)
21247 /* skip_form_bytes already issued the complaint. */
21255 /* A helper function which parses the header of a macro section.
21256 If the macro section is the extended (for now called "GNU") type,
21257 then this updates *OFFSET_SIZE. Returns a pointer to just after
21258 the header, or issues a complaint and returns NULL on error. */
21260 static const gdb_byte
*
21261 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
21263 const gdb_byte
*mac_ptr
,
21264 unsigned int *offset_size
,
21265 int section_is_gnu
)
21267 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
21269 if (section_is_gnu
)
21271 unsigned int version
, flags
;
21273 version
= read_2_bytes (abfd
, mac_ptr
);
21276 complaint (&symfile_complaints
,
21277 _("unrecognized version `%d' in .debug_macro section"),
21283 flags
= read_1_byte (abfd
, mac_ptr
);
21285 *offset_size
= (flags
& 1) ? 8 : 4;
21287 if ((flags
& 2) != 0)
21288 /* We don't need the line table offset. */
21289 mac_ptr
+= *offset_size
;
21291 /* Vendor opcode descriptions. */
21292 if ((flags
& 4) != 0)
21294 unsigned int i
, count
;
21296 count
= read_1_byte (abfd
, mac_ptr
);
21298 for (i
= 0; i
< count
; ++i
)
21300 unsigned int opcode
, bytes_read
;
21303 opcode
= read_1_byte (abfd
, mac_ptr
);
21305 opcode_definitions
[opcode
] = mac_ptr
;
21306 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21307 mac_ptr
+= bytes_read
;
21316 /* A helper for dwarf_decode_macros that handles the GNU extensions,
21317 including DW_MACRO_GNU_transparent_include. */
21320 dwarf_decode_macro_bytes (bfd
*abfd
,
21321 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
21322 struct macro_source_file
*current_file
,
21323 struct line_header
*lh
,
21324 struct dwarf2_section_info
*section
,
21325 int section_is_gnu
, int section_is_dwz
,
21326 unsigned int offset_size
,
21327 htab_t include_hash
)
21329 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21330 enum dwarf_macro_record_type macinfo_type
;
21331 int at_commandline
;
21332 const gdb_byte
*opcode_definitions
[256];
21334 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
21335 &offset_size
, section_is_gnu
);
21336 if (mac_ptr
== NULL
)
21338 /* We already issued a complaint. */
21342 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
21343 GDB is still reading the definitions from command line. First
21344 DW_MACINFO_start_file will need to be ignored as it was already executed
21345 to create CURRENT_FILE for the main source holding also the command line
21346 definitions. On first met DW_MACINFO_start_file this flag is reset to
21347 normally execute all the remaining DW_MACINFO_start_file macinfos. */
21349 at_commandline
= 1;
21353 /* Do we at least have room for a macinfo type byte? */
21354 if (mac_ptr
>= mac_end
)
21356 dwarf2_section_buffer_overflow_complaint (section
);
21360 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
21363 /* Note that we rely on the fact that the corresponding GNU and
21364 DWARF constants are the same. */
21365 switch (macinfo_type
)
21367 /* A zero macinfo type indicates the end of the macro
21372 case DW_MACRO_GNU_define
:
21373 case DW_MACRO_GNU_undef
:
21374 case DW_MACRO_GNU_define_indirect
:
21375 case DW_MACRO_GNU_undef_indirect
:
21376 case DW_MACRO_GNU_define_indirect_alt
:
21377 case DW_MACRO_GNU_undef_indirect_alt
:
21379 unsigned int bytes_read
;
21384 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21385 mac_ptr
+= bytes_read
;
21387 if (macinfo_type
== DW_MACRO_GNU_define
21388 || macinfo_type
== DW_MACRO_GNU_undef
)
21390 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21391 mac_ptr
+= bytes_read
;
21395 LONGEST str_offset
;
21397 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
21398 mac_ptr
+= offset_size
;
21400 if (macinfo_type
== DW_MACRO_GNU_define_indirect_alt
21401 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
21404 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
21406 body
= read_indirect_string_from_dwz (dwz
, str_offset
);
21409 body
= read_indirect_string_at_offset (abfd
, str_offset
);
21412 is_define
= (macinfo_type
== DW_MACRO_GNU_define
21413 || macinfo_type
== DW_MACRO_GNU_define_indirect
21414 || macinfo_type
== DW_MACRO_GNU_define_indirect_alt
);
21415 if (! current_file
)
21417 /* DWARF violation as no main source is present. */
21418 complaint (&symfile_complaints
,
21419 _("debug info with no main source gives macro %s "
21421 is_define
? _("definition") : _("undefinition"),
21425 if ((line
== 0 && !at_commandline
)
21426 || (line
!= 0 && at_commandline
))
21427 complaint (&symfile_complaints
,
21428 _("debug info gives %s macro %s with %s line %d: %s"),
21429 at_commandline
? _("command-line") : _("in-file"),
21430 is_define
? _("definition") : _("undefinition"),
21431 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
21434 parse_macro_definition (current_file
, line
, body
);
21437 gdb_assert (macinfo_type
== DW_MACRO_GNU_undef
21438 || macinfo_type
== DW_MACRO_GNU_undef_indirect
21439 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
);
21440 macro_undef (current_file
, line
, body
);
21445 case DW_MACRO_GNU_start_file
:
21447 unsigned int bytes_read
;
21450 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21451 mac_ptr
+= bytes_read
;
21452 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21453 mac_ptr
+= bytes_read
;
21455 if ((line
== 0 && !at_commandline
)
21456 || (line
!= 0 && at_commandline
))
21457 complaint (&symfile_complaints
,
21458 _("debug info gives source %d included "
21459 "from %s at %s line %d"),
21460 file
, at_commandline
? _("command-line") : _("file"),
21461 line
== 0 ? _("zero") : _("non-zero"), line
);
21463 if (at_commandline
)
21465 /* This DW_MACRO_GNU_start_file was executed in the
21467 at_commandline
= 0;
21470 current_file
= macro_start_file (file
, line
, current_file
, lh
);
21474 case DW_MACRO_GNU_end_file
:
21475 if (! current_file
)
21476 complaint (&symfile_complaints
,
21477 _("macro debug info has an unmatched "
21478 "`close_file' directive"));
21481 current_file
= current_file
->included_by
;
21482 if (! current_file
)
21484 enum dwarf_macro_record_type next_type
;
21486 /* GCC circa March 2002 doesn't produce the zero
21487 type byte marking the end of the compilation
21488 unit. Complain if it's not there, but exit no
21491 /* Do we at least have room for a macinfo type byte? */
21492 if (mac_ptr
>= mac_end
)
21494 dwarf2_section_buffer_overflow_complaint (section
);
21498 /* We don't increment mac_ptr here, so this is just
21501 = (enum dwarf_macro_record_type
) read_1_byte (abfd
,
21503 if (next_type
!= 0)
21504 complaint (&symfile_complaints
,
21505 _("no terminating 0-type entry for "
21506 "macros in `.debug_macinfo' section"));
21513 case DW_MACRO_GNU_transparent_include
:
21514 case DW_MACRO_GNU_transparent_include_alt
:
21518 bfd
*include_bfd
= abfd
;
21519 struct dwarf2_section_info
*include_section
= section
;
21520 struct dwarf2_section_info alt_section
;
21521 const gdb_byte
*include_mac_end
= mac_end
;
21522 int is_dwz
= section_is_dwz
;
21523 const gdb_byte
*new_mac_ptr
;
21525 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
21526 mac_ptr
+= offset_size
;
21528 if (macinfo_type
== DW_MACRO_GNU_transparent_include_alt
)
21530 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
21532 dwarf2_read_section (objfile
, &dwz
->macro
);
21534 include_section
= &dwz
->macro
;
21535 include_bfd
= get_section_bfd_owner (include_section
);
21536 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
21540 new_mac_ptr
= include_section
->buffer
+ offset
;
21541 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
21545 /* This has actually happened; see
21546 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
21547 complaint (&symfile_complaints
,
21548 _("recursive DW_MACRO_GNU_transparent_include in "
21549 ".debug_macro section"));
21553 *slot
= (void *) new_mac_ptr
;
21555 dwarf_decode_macro_bytes (include_bfd
, new_mac_ptr
,
21556 include_mac_end
, current_file
, lh
,
21557 section
, section_is_gnu
, is_dwz
,
21558 offset_size
, include_hash
);
21560 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
21565 case DW_MACINFO_vendor_ext
:
21566 if (!section_is_gnu
)
21568 unsigned int bytes_read
;
21571 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21572 mac_ptr
+= bytes_read
;
21573 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21574 mac_ptr
+= bytes_read
;
21576 /* We don't recognize any vendor extensions. */
21582 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
21583 mac_ptr
, mac_end
, abfd
, offset_size
,
21585 if (mac_ptr
== NULL
)
21589 } while (macinfo_type
!= 0);
21593 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
21594 int section_is_gnu
)
21596 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21597 struct line_header
*lh
= cu
->line_header
;
21599 const gdb_byte
*mac_ptr
, *mac_end
;
21600 struct macro_source_file
*current_file
= 0;
21601 enum dwarf_macro_record_type macinfo_type
;
21602 unsigned int offset_size
= cu
->header
.offset_size
;
21603 const gdb_byte
*opcode_definitions
[256];
21604 struct cleanup
*cleanup
;
21605 htab_t include_hash
;
21607 struct dwarf2_section_info
*section
;
21608 const char *section_name
;
21610 if (cu
->dwo_unit
!= NULL
)
21612 if (section_is_gnu
)
21614 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
21615 section_name
= ".debug_macro.dwo";
21619 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
21620 section_name
= ".debug_macinfo.dwo";
21625 if (section_is_gnu
)
21627 section
= &dwarf2_per_objfile
->macro
;
21628 section_name
= ".debug_macro";
21632 section
= &dwarf2_per_objfile
->macinfo
;
21633 section_name
= ".debug_macinfo";
21637 dwarf2_read_section (objfile
, section
);
21638 if (section
->buffer
== NULL
)
21640 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
21643 abfd
= get_section_bfd_owner (section
);
21645 /* First pass: Find the name of the base filename.
21646 This filename is needed in order to process all macros whose definition
21647 (or undefinition) comes from the command line. These macros are defined
21648 before the first DW_MACINFO_start_file entry, and yet still need to be
21649 associated to the base file.
21651 To determine the base file name, we scan the macro definitions until we
21652 reach the first DW_MACINFO_start_file entry. We then initialize
21653 CURRENT_FILE accordingly so that any macro definition found before the
21654 first DW_MACINFO_start_file can still be associated to the base file. */
21656 mac_ptr
= section
->buffer
+ offset
;
21657 mac_end
= section
->buffer
+ section
->size
;
21659 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
21660 &offset_size
, section_is_gnu
);
21661 if (mac_ptr
== NULL
)
21663 /* We already issued a complaint. */
21669 /* Do we at least have room for a macinfo type byte? */
21670 if (mac_ptr
>= mac_end
)
21672 /* Complaint is printed during the second pass as GDB will probably
21673 stop the first pass earlier upon finding
21674 DW_MACINFO_start_file. */
21678 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
21681 /* Note that we rely on the fact that the corresponding GNU and
21682 DWARF constants are the same. */
21683 switch (macinfo_type
)
21685 /* A zero macinfo type indicates the end of the macro
21690 case DW_MACRO_GNU_define
:
21691 case DW_MACRO_GNU_undef
:
21692 /* Only skip the data by MAC_PTR. */
21694 unsigned int bytes_read
;
21696 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21697 mac_ptr
+= bytes_read
;
21698 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21699 mac_ptr
+= bytes_read
;
21703 case DW_MACRO_GNU_start_file
:
21705 unsigned int bytes_read
;
21708 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21709 mac_ptr
+= bytes_read
;
21710 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21711 mac_ptr
+= bytes_read
;
21713 current_file
= macro_start_file (file
, line
, current_file
, lh
);
21717 case DW_MACRO_GNU_end_file
:
21718 /* No data to skip by MAC_PTR. */
21721 case DW_MACRO_GNU_define_indirect
:
21722 case DW_MACRO_GNU_undef_indirect
:
21723 case DW_MACRO_GNU_define_indirect_alt
:
21724 case DW_MACRO_GNU_undef_indirect_alt
:
21726 unsigned int bytes_read
;
21728 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21729 mac_ptr
+= bytes_read
;
21730 mac_ptr
+= offset_size
;
21734 case DW_MACRO_GNU_transparent_include
:
21735 case DW_MACRO_GNU_transparent_include_alt
:
21736 /* Note that, according to the spec, a transparent include
21737 chain cannot call DW_MACRO_GNU_start_file. So, we can just
21738 skip this opcode. */
21739 mac_ptr
+= offset_size
;
21742 case DW_MACINFO_vendor_ext
:
21743 /* Only skip the data by MAC_PTR. */
21744 if (!section_is_gnu
)
21746 unsigned int bytes_read
;
21748 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21749 mac_ptr
+= bytes_read
;
21750 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21751 mac_ptr
+= bytes_read
;
21756 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
21757 mac_ptr
, mac_end
, abfd
, offset_size
,
21759 if (mac_ptr
== NULL
)
21763 } while (macinfo_type
!= 0 && current_file
== NULL
);
21765 /* Second pass: Process all entries.
21767 Use the AT_COMMAND_LINE flag to determine whether we are still processing
21768 command-line macro definitions/undefinitions. This flag is unset when we
21769 reach the first DW_MACINFO_start_file entry. */
21771 include_hash
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
21772 NULL
, xcalloc
, xfree
);
21773 cleanup
= make_cleanup_htab_delete (include_hash
);
21774 mac_ptr
= section
->buffer
+ offset
;
21775 slot
= htab_find_slot (include_hash
, mac_ptr
, INSERT
);
21776 *slot
= (void *) mac_ptr
;
21777 dwarf_decode_macro_bytes (abfd
, mac_ptr
, mac_end
,
21778 current_file
, lh
, section
,
21779 section_is_gnu
, 0, offset_size
, include_hash
);
21780 do_cleanups (cleanup
);
21783 /* Check if the attribute's form is a DW_FORM_block*
21784 if so return true else false. */
21787 attr_form_is_block (const struct attribute
*attr
)
21789 return (attr
== NULL
? 0 :
21790 attr
->form
== DW_FORM_block1
21791 || attr
->form
== DW_FORM_block2
21792 || attr
->form
== DW_FORM_block4
21793 || attr
->form
== DW_FORM_block
21794 || attr
->form
== DW_FORM_exprloc
);
21797 /* Return non-zero if ATTR's value is a section offset --- classes
21798 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
21799 You may use DW_UNSND (attr) to retrieve such offsets.
21801 Section 7.5.4, "Attribute Encodings", explains that no attribute
21802 may have a value that belongs to more than one of these classes; it
21803 would be ambiguous if we did, because we use the same forms for all
21807 attr_form_is_section_offset (const struct attribute
*attr
)
21809 return (attr
->form
== DW_FORM_data4
21810 || attr
->form
== DW_FORM_data8
21811 || attr
->form
== DW_FORM_sec_offset
);
21814 /* Return non-zero if ATTR's value falls in the 'constant' class, or
21815 zero otherwise. When this function returns true, you can apply
21816 dwarf2_get_attr_constant_value to it.
21818 However, note that for some attributes you must check
21819 attr_form_is_section_offset before using this test. DW_FORM_data4
21820 and DW_FORM_data8 are members of both the constant class, and of
21821 the classes that contain offsets into other debug sections
21822 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
21823 that, if an attribute's can be either a constant or one of the
21824 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
21825 taken as section offsets, not constants. */
21828 attr_form_is_constant (const struct attribute
*attr
)
21830 switch (attr
->form
)
21832 case DW_FORM_sdata
:
21833 case DW_FORM_udata
:
21834 case DW_FORM_data1
:
21835 case DW_FORM_data2
:
21836 case DW_FORM_data4
:
21837 case DW_FORM_data8
:
21845 /* DW_ADDR is always stored already as sect_offset; despite for the forms
21846 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
21849 attr_form_is_ref (const struct attribute
*attr
)
21851 switch (attr
->form
)
21853 case DW_FORM_ref_addr
:
21858 case DW_FORM_ref_udata
:
21859 case DW_FORM_GNU_ref_alt
:
21866 /* Return the .debug_loc section to use for CU.
21867 For DWO files use .debug_loc.dwo. */
21869 static struct dwarf2_section_info
*
21870 cu_debug_loc_section (struct dwarf2_cu
*cu
)
21873 return &cu
->dwo_unit
->dwo_file
->sections
.loc
;
21874 return &dwarf2_per_objfile
->loc
;
21877 /* A helper function that fills in a dwarf2_loclist_baton. */
21880 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
21881 struct dwarf2_loclist_baton
*baton
,
21882 const struct attribute
*attr
)
21884 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
21886 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
21888 baton
->per_cu
= cu
->per_cu
;
21889 gdb_assert (baton
->per_cu
);
21890 /* We don't know how long the location list is, but make sure we
21891 don't run off the edge of the section. */
21892 baton
->size
= section
->size
- DW_UNSND (attr
);
21893 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
21894 baton
->base_address
= cu
->base_address
;
21895 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
21899 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
21900 struct dwarf2_cu
*cu
, int is_block
)
21902 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21903 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
21905 if (attr_form_is_section_offset (attr
)
21906 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
21907 the section. If so, fall through to the complaint in the
21909 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
21911 struct dwarf2_loclist_baton
*baton
;
21913 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
21915 fill_in_loclist_baton (cu
, baton
, attr
);
21917 if (cu
->base_known
== 0)
21918 complaint (&symfile_complaints
,
21919 _("Location list used without "
21920 "specifying the CU base address."));
21922 SYMBOL_ACLASS_INDEX (sym
) = (is_block
21923 ? dwarf2_loclist_block_index
21924 : dwarf2_loclist_index
);
21925 SYMBOL_LOCATION_BATON (sym
) = baton
;
21929 struct dwarf2_locexpr_baton
*baton
;
21931 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
21932 baton
->per_cu
= cu
->per_cu
;
21933 gdb_assert (baton
->per_cu
);
21935 if (attr_form_is_block (attr
))
21937 /* Note that we're just copying the block's data pointer
21938 here, not the actual data. We're still pointing into the
21939 info_buffer for SYM's objfile; right now we never release
21940 that buffer, but when we do clean up properly this may
21942 baton
->size
= DW_BLOCK (attr
)->size
;
21943 baton
->data
= DW_BLOCK (attr
)->data
;
21947 dwarf2_invalid_attrib_class_complaint ("location description",
21948 SYMBOL_NATURAL_NAME (sym
));
21952 SYMBOL_ACLASS_INDEX (sym
) = (is_block
21953 ? dwarf2_locexpr_block_index
21954 : dwarf2_locexpr_index
);
21955 SYMBOL_LOCATION_BATON (sym
) = baton
;
21959 /* Return the OBJFILE associated with the compilation unit CU. If CU
21960 came from a separate debuginfo file, then the master objfile is
21964 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
21966 struct objfile
*objfile
= per_cu
->objfile
;
21968 /* Return the master objfile, so that we can report and look up the
21969 correct file containing this variable. */
21970 if (objfile
->separate_debug_objfile_backlink
)
21971 objfile
= objfile
->separate_debug_objfile_backlink
;
21976 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
21977 (CU_HEADERP is unused in such case) or prepare a temporary copy at
21978 CU_HEADERP first. */
21980 static const struct comp_unit_head
*
21981 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
21982 struct dwarf2_per_cu_data
*per_cu
)
21984 const gdb_byte
*info_ptr
;
21987 return &per_cu
->cu
->header
;
21989 info_ptr
= per_cu
->section
->buffer
+ per_cu
->offset
.sect_off
;
21991 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
21992 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->objfile
->obfd
);
21997 /* Return the address size given in the compilation unit header for CU. */
22000 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
22002 struct comp_unit_head cu_header_local
;
22003 const struct comp_unit_head
*cu_headerp
;
22005 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
22007 return cu_headerp
->addr_size
;
22010 /* Return the offset size given in the compilation unit header for CU. */
22013 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
22015 struct comp_unit_head cu_header_local
;
22016 const struct comp_unit_head
*cu_headerp
;
22018 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
22020 return cu_headerp
->offset_size
;
22023 /* See its dwarf2loc.h declaration. */
22026 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
22028 struct comp_unit_head cu_header_local
;
22029 const struct comp_unit_head
*cu_headerp
;
22031 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
22033 if (cu_headerp
->version
== 2)
22034 return cu_headerp
->addr_size
;
22036 return cu_headerp
->offset_size
;
22039 /* Return the text offset of the CU. The returned offset comes from
22040 this CU's objfile. If this objfile came from a separate debuginfo
22041 file, then the offset may be different from the corresponding
22042 offset in the parent objfile. */
22045 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
22047 struct objfile
*objfile
= per_cu
->objfile
;
22049 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
22052 /* Locate the .debug_info compilation unit from CU's objfile which contains
22053 the DIE at OFFSET. Raises an error on failure. */
22055 static struct dwarf2_per_cu_data
*
22056 dwarf2_find_containing_comp_unit (sect_offset offset
,
22057 unsigned int offset_in_dwz
,
22058 struct objfile
*objfile
)
22060 struct dwarf2_per_cu_data
*this_cu
;
22062 const sect_offset
*cu_off
;
22065 high
= dwarf2_per_objfile
->n_comp_units
- 1;
22068 struct dwarf2_per_cu_data
*mid_cu
;
22069 int mid
= low
+ (high
- low
) / 2;
22071 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
22072 cu_off
= &mid_cu
->offset
;
22073 if (mid_cu
->is_dwz
> offset_in_dwz
22074 || (mid_cu
->is_dwz
== offset_in_dwz
22075 && cu_off
->sect_off
>= offset
.sect_off
))
22080 gdb_assert (low
== high
);
22081 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
22082 cu_off
= &this_cu
->offset
;
22083 if (this_cu
->is_dwz
!= offset_in_dwz
|| cu_off
->sect_off
> offset
.sect_off
)
22085 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
22086 error (_("Dwarf Error: could not find partial DIE containing "
22087 "offset 0x%lx [in module %s]"),
22088 (long) offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
22090 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
.sect_off
22091 <= offset
.sect_off
);
22092 return dwarf2_per_objfile
->all_comp_units
[low
-1];
22096 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
22097 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
22098 && offset
.sect_off
>= this_cu
->offset
.sect_off
+ this_cu
->length
)
22099 error (_("invalid dwarf2 offset %u"), offset
.sect_off
);
22100 gdb_assert (offset
.sect_off
< this_cu
->offset
.sect_off
+ this_cu
->length
);
22105 /* Initialize dwarf2_cu CU, owned by PER_CU. */
22108 init_one_comp_unit (struct dwarf2_cu
*cu
, struct dwarf2_per_cu_data
*per_cu
)
22110 memset (cu
, 0, sizeof (*cu
));
22112 cu
->per_cu
= per_cu
;
22113 cu
->objfile
= per_cu
->objfile
;
22114 obstack_init (&cu
->comp_unit_obstack
);
22117 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
22120 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
22121 enum language pretend_language
)
22123 struct attribute
*attr
;
22125 /* Set the language we're debugging. */
22126 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
22128 set_cu_language (DW_UNSND (attr
), cu
);
22131 cu
->language
= pretend_language
;
22132 cu
->language_defn
= language_def (cu
->language
);
22135 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
22138 /* Release one cached compilation unit, CU. We unlink it from the tree
22139 of compilation units, but we don't remove it from the read_in_chain;
22140 the caller is responsible for that.
22141 NOTE: DATA is a void * because this function is also used as a
22142 cleanup routine. */
22145 free_heap_comp_unit (void *data
)
22147 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) data
;
22149 gdb_assert (cu
->per_cu
!= NULL
);
22150 cu
->per_cu
->cu
= NULL
;
22153 obstack_free (&cu
->comp_unit_obstack
, NULL
);
22158 /* This cleanup function is passed the address of a dwarf2_cu on the stack
22159 when we're finished with it. We can't free the pointer itself, but be
22160 sure to unlink it from the cache. Also release any associated storage. */
22163 free_stack_comp_unit (void *data
)
22165 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) data
;
22167 gdb_assert (cu
->per_cu
!= NULL
);
22168 cu
->per_cu
->cu
= NULL
;
22171 obstack_free (&cu
->comp_unit_obstack
, NULL
);
22172 cu
->partial_dies
= NULL
;
22175 /* Free all cached compilation units. */
22178 free_cached_comp_units (void *data
)
22180 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22182 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22183 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22184 while (per_cu
!= NULL
)
22186 struct dwarf2_per_cu_data
*next_cu
;
22188 next_cu
= per_cu
->cu
->read_in_chain
;
22190 free_heap_comp_unit (per_cu
->cu
);
22191 *last_chain
= next_cu
;
22197 /* Increase the age counter on each cached compilation unit, and free
22198 any that are too old. */
22201 age_cached_comp_units (void)
22203 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22205 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
22206 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22207 while (per_cu
!= NULL
)
22209 per_cu
->cu
->last_used
++;
22210 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
22211 dwarf2_mark (per_cu
->cu
);
22212 per_cu
= per_cu
->cu
->read_in_chain
;
22215 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22216 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22217 while (per_cu
!= NULL
)
22219 struct dwarf2_per_cu_data
*next_cu
;
22221 next_cu
= per_cu
->cu
->read_in_chain
;
22223 if (!per_cu
->cu
->mark
)
22225 free_heap_comp_unit (per_cu
->cu
);
22226 *last_chain
= next_cu
;
22229 last_chain
= &per_cu
->cu
->read_in_chain
;
22235 /* Remove a single compilation unit from the cache. */
22238 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
22240 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22242 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22243 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22244 while (per_cu
!= NULL
)
22246 struct dwarf2_per_cu_data
*next_cu
;
22248 next_cu
= per_cu
->cu
->read_in_chain
;
22250 if (per_cu
== target_per_cu
)
22252 free_heap_comp_unit (per_cu
->cu
);
22254 *last_chain
= next_cu
;
22258 last_chain
= &per_cu
->cu
->read_in_chain
;
22264 /* Release all extra memory associated with OBJFILE. */
22267 dwarf2_free_objfile (struct objfile
*objfile
)
22270 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
22271 dwarf2_objfile_data_key
);
22273 if (dwarf2_per_objfile
== NULL
)
22276 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
22277 free_cached_comp_units (NULL
);
22279 if (dwarf2_per_objfile
->quick_file_names_table
)
22280 htab_delete (dwarf2_per_objfile
->quick_file_names_table
);
22282 if (dwarf2_per_objfile
->line_header_hash
)
22283 htab_delete (dwarf2_per_objfile
->line_header_hash
);
22285 /* Everything else should be on the objfile obstack. */
22288 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
22289 We store these in a hash table separate from the DIEs, and preserve them
22290 when the DIEs are flushed out of cache.
22292 The CU "per_cu" pointer is needed because offset alone is not enough to
22293 uniquely identify the type. A file may have multiple .debug_types sections,
22294 or the type may come from a DWO file. Furthermore, while it's more logical
22295 to use per_cu->section+offset, with Fission the section with the data is in
22296 the DWO file but we don't know that section at the point we need it.
22297 We have to use something in dwarf2_per_cu_data (or the pointer to it)
22298 because we can enter the lookup routine, get_die_type_at_offset, from
22299 outside this file, and thus won't necessarily have PER_CU->cu.
22300 Fortunately, PER_CU is stable for the life of the objfile. */
22302 struct dwarf2_per_cu_offset_and_type
22304 const struct dwarf2_per_cu_data
*per_cu
;
22305 sect_offset offset
;
22309 /* Hash function for a dwarf2_per_cu_offset_and_type. */
22312 per_cu_offset_and_type_hash (const void *item
)
22314 const struct dwarf2_per_cu_offset_and_type
*ofs
22315 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
22317 return (uintptr_t) ofs
->per_cu
+ ofs
->offset
.sect_off
;
22320 /* Equality function for a dwarf2_per_cu_offset_and_type. */
22323 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
22325 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
22326 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
22327 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
22328 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
22330 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
22331 && ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
);
22334 /* Set the type associated with DIE to TYPE. Save it in CU's hash
22335 table if necessary. For convenience, return TYPE.
22337 The DIEs reading must have careful ordering to:
22338 * Not cause infite loops trying to read in DIEs as a prerequisite for
22339 reading current DIE.
22340 * Not trying to dereference contents of still incompletely read in types
22341 while reading in other DIEs.
22342 * Enable referencing still incompletely read in types just by a pointer to
22343 the type without accessing its fields.
22345 Therefore caller should follow these rules:
22346 * Try to fetch any prerequisite types we may need to build this DIE type
22347 before building the type and calling set_die_type.
22348 * After building type call set_die_type for current DIE as soon as
22349 possible before fetching more types to complete the current type.
22350 * Make the type as complete as possible before fetching more types. */
22352 static struct type
*
22353 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
22355 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
22356 struct objfile
*objfile
= cu
->objfile
;
22357 struct attribute
*attr
;
22358 struct dynamic_prop prop
;
22360 /* For Ada types, make sure that the gnat-specific data is always
22361 initialized (if not already set). There are a few types where
22362 we should not be doing so, because the type-specific area is
22363 already used to hold some other piece of info (eg: TYPE_CODE_FLT
22364 where the type-specific area is used to store the floatformat).
22365 But this is not a problem, because the gnat-specific information
22366 is actually not needed for these types. */
22367 if (need_gnat_info (cu
)
22368 && TYPE_CODE (type
) != TYPE_CODE_FUNC
22369 && TYPE_CODE (type
) != TYPE_CODE_FLT
22370 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
22371 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
22372 && TYPE_CODE (type
) != TYPE_CODE_METHOD
22373 && !HAVE_GNAT_AUX_INFO (type
))
22374 INIT_GNAT_SPECIFIC (type
);
22376 /* Read DW_AT_allocated and set in type. */
22377 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
22378 if (attr_form_is_block (attr
))
22380 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
22381 add_dyn_prop (DYN_PROP_ALLOCATED
, prop
, type
, objfile
);
22383 else if (attr
!= NULL
)
22385 complaint (&symfile_complaints
,
22386 _("DW_AT_allocated has the wrong form (%s) at DIE 0x%x"),
22387 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
22388 die
->offset
.sect_off
);
22391 /* Read DW_AT_associated and set in type. */
22392 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
22393 if (attr_form_is_block (attr
))
22395 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
22396 add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
, type
, objfile
);
22398 else if (attr
!= NULL
)
22400 complaint (&symfile_complaints
,
22401 _("DW_AT_associated has the wrong form (%s) at DIE 0x%x"),
22402 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
22403 die
->offset
.sect_off
);
22406 /* Read DW_AT_data_location and set in type. */
22407 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
22408 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
22409 add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
, type
, objfile
);
22411 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
22413 dwarf2_per_objfile
->die_type_hash
=
22414 htab_create_alloc_ex (127,
22415 per_cu_offset_and_type_hash
,
22416 per_cu_offset_and_type_eq
,
22418 &objfile
->objfile_obstack
,
22419 hashtab_obstack_allocate
,
22420 dummy_obstack_deallocate
);
22423 ofs
.per_cu
= cu
->per_cu
;
22424 ofs
.offset
= die
->offset
;
22426 slot
= (struct dwarf2_per_cu_offset_and_type
**)
22427 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
22429 complaint (&symfile_complaints
,
22430 _("A problem internal to GDB: DIE 0x%x has type already set"),
22431 die
->offset
.sect_off
);
22432 *slot
= XOBNEW (&objfile
->objfile_obstack
,
22433 struct dwarf2_per_cu_offset_and_type
);
22438 /* Look up the type for the die at OFFSET in PER_CU in die_type_hash,
22439 or return NULL if the die does not have a saved type. */
22441 static struct type
*
22442 get_die_type_at_offset (sect_offset offset
,
22443 struct dwarf2_per_cu_data
*per_cu
)
22445 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
22447 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
22450 ofs
.per_cu
= per_cu
;
22451 ofs
.offset
= offset
;
22452 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
22453 htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
));
22460 /* Look up the type for DIE in CU in die_type_hash,
22461 or return NULL if DIE does not have a saved type. */
22463 static struct type
*
22464 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22466 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
22469 /* Add a dependence relationship from CU to REF_PER_CU. */
22472 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
22473 struct dwarf2_per_cu_data
*ref_per_cu
)
22477 if (cu
->dependencies
== NULL
)
22479 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
22480 NULL
, &cu
->comp_unit_obstack
,
22481 hashtab_obstack_allocate
,
22482 dummy_obstack_deallocate
);
22484 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
22486 *slot
= ref_per_cu
;
22489 /* Subroutine of dwarf2_mark to pass to htab_traverse.
22490 Set the mark field in every compilation unit in the
22491 cache that we must keep because we are keeping CU. */
22494 dwarf2_mark_helper (void **slot
, void *data
)
22496 struct dwarf2_per_cu_data
*per_cu
;
22498 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
22500 /* cu->dependencies references may not yet have been ever read if QUIT aborts
22501 reading of the chain. As such dependencies remain valid it is not much
22502 useful to track and undo them during QUIT cleanups. */
22503 if (per_cu
->cu
== NULL
)
22506 if (per_cu
->cu
->mark
)
22508 per_cu
->cu
->mark
= 1;
22510 if (per_cu
->cu
->dependencies
!= NULL
)
22511 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
22516 /* Set the mark field in CU and in every other compilation unit in the
22517 cache that we must keep because we are keeping CU. */
22520 dwarf2_mark (struct dwarf2_cu
*cu
)
22525 if (cu
->dependencies
!= NULL
)
22526 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
22530 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
22534 per_cu
->cu
->mark
= 0;
22535 per_cu
= per_cu
->cu
->read_in_chain
;
22539 /* Trivial hash function for partial_die_info: the hash value of a DIE
22540 is its offset in .debug_info for this objfile. */
22543 partial_die_hash (const void *item
)
22545 const struct partial_die_info
*part_die
22546 = (const struct partial_die_info
*) item
;
22548 return part_die
->offset
.sect_off
;
22551 /* Trivial comparison function for partial_die_info structures: two DIEs
22552 are equal if they have the same offset. */
22555 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
22557 const struct partial_die_info
*part_die_lhs
22558 = (const struct partial_die_info
*) item_lhs
;
22559 const struct partial_die_info
*part_die_rhs
22560 = (const struct partial_die_info
*) item_rhs
;
22562 return part_die_lhs
->offset
.sect_off
== part_die_rhs
->offset
.sect_off
;
22565 static struct cmd_list_element
*set_dwarf_cmdlist
;
22566 static struct cmd_list_element
*show_dwarf_cmdlist
;
22569 set_dwarf_cmd (char *args
, int from_tty
)
22571 help_list (set_dwarf_cmdlist
, "maintenance set dwarf ", all_commands
,
22576 show_dwarf_cmd (char *args
, int from_tty
)
22578 cmd_show_list (show_dwarf_cmdlist
, from_tty
, "");
22581 /* Free data associated with OBJFILE, if necessary. */
22584 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
22586 struct dwarf2_per_objfile
*data
= (struct dwarf2_per_objfile
*) d
;
22589 /* Make sure we don't accidentally use dwarf2_per_objfile while
22591 dwarf2_per_objfile
= NULL
;
22593 for (ix
= 0; ix
< data
->n_comp_units
; ++ix
)
22594 VEC_free (dwarf2_per_cu_ptr
, data
->all_comp_units
[ix
]->imported_symtabs
);
22596 for (ix
= 0; ix
< data
->n_type_units
; ++ix
)
22597 VEC_free (dwarf2_per_cu_ptr
,
22598 data
->all_type_units
[ix
]->per_cu
.imported_symtabs
);
22599 xfree (data
->all_type_units
);
22601 VEC_free (dwarf2_section_info_def
, data
->types
);
22603 if (data
->dwo_files
)
22604 free_dwo_files (data
->dwo_files
, objfile
);
22605 if (data
->dwp_file
)
22606 gdb_bfd_unref (data
->dwp_file
->dbfd
);
22608 if (data
->dwz_file
&& data
->dwz_file
->dwz_bfd
)
22609 gdb_bfd_unref (data
->dwz_file
->dwz_bfd
);
22613 /* The "save gdb-index" command. */
22615 /* The contents of the hash table we create when building the string
22617 struct strtab_entry
22619 offset_type offset
;
22623 /* Hash function for a strtab_entry.
22625 Function is used only during write_hash_table so no index format backward
22626 compatibility is needed. */
22629 hash_strtab_entry (const void *e
)
22631 const struct strtab_entry
*entry
= (const struct strtab_entry
*) e
;
22632 return mapped_index_string_hash (INT_MAX
, entry
->str
);
22635 /* Equality function for a strtab_entry. */
22638 eq_strtab_entry (const void *a
, const void *b
)
22640 const struct strtab_entry
*ea
= (const struct strtab_entry
*) a
;
22641 const struct strtab_entry
*eb
= (const struct strtab_entry
*) b
;
22642 return !strcmp (ea
->str
, eb
->str
);
22645 /* Create a strtab_entry hash table. */
22648 create_strtab (void)
22650 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
22651 xfree
, xcalloc
, xfree
);
22654 /* Add a string to the constant pool. Return the string's offset in
22658 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
22661 struct strtab_entry entry
;
22662 struct strtab_entry
*result
;
22665 slot
= htab_find_slot (table
, &entry
, INSERT
);
22667 result
= (struct strtab_entry
*) *slot
;
22670 result
= XNEW (struct strtab_entry
);
22671 result
->offset
= obstack_object_size (cpool
);
22673 obstack_grow_str0 (cpool
, str
);
22676 return result
->offset
;
22679 /* An entry in the symbol table. */
22680 struct symtab_index_entry
22682 /* The name of the symbol. */
22684 /* The offset of the name in the constant pool. */
22685 offset_type index_offset
;
22686 /* A sorted vector of the indices of all the CUs that hold an object
22688 VEC (offset_type
) *cu_indices
;
22691 /* The symbol table. This is a power-of-2-sized hash table. */
22692 struct mapped_symtab
22694 offset_type n_elements
;
22696 struct symtab_index_entry
**data
;
22699 /* Hash function for a symtab_index_entry. */
22702 hash_symtab_entry (const void *e
)
22704 const struct symtab_index_entry
*entry
22705 = (const struct symtab_index_entry
*) e
;
22706 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
22707 sizeof (offset_type
) * VEC_length (offset_type
,
22708 entry
->cu_indices
),
22712 /* Equality function for a symtab_index_entry. */
22715 eq_symtab_entry (const void *a
, const void *b
)
22717 const struct symtab_index_entry
*ea
= (const struct symtab_index_entry
*) a
;
22718 const struct symtab_index_entry
*eb
= (const struct symtab_index_entry
*) b
;
22719 int len
= VEC_length (offset_type
, ea
->cu_indices
);
22720 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
22722 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
22723 VEC_address (offset_type
, eb
->cu_indices
),
22724 sizeof (offset_type
) * len
);
22727 /* Destroy a symtab_index_entry. */
22730 delete_symtab_entry (void *p
)
22732 struct symtab_index_entry
*entry
= (struct symtab_index_entry
*) p
;
22733 VEC_free (offset_type
, entry
->cu_indices
);
22737 /* Create a hash table holding symtab_index_entry objects. */
22740 create_symbol_hash_table (void)
22742 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
22743 delete_symtab_entry
, xcalloc
, xfree
);
22746 /* Create a new mapped symtab object. */
22748 static struct mapped_symtab
*
22749 create_mapped_symtab (void)
22751 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
22752 symtab
->n_elements
= 0;
22753 symtab
->size
= 1024;
22754 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
22758 /* Destroy a mapped_symtab. */
22761 cleanup_mapped_symtab (void *p
)
22763 struct mapped_symtab
*symtab
= (struct mapped_symtab
*) p
;
22764 /* The contents of the array are freed when the other hash table is
22766 xfree (symtab
->data
);
22770 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
22773 Function is used only during write_hash_table so no index format backward
22774 compatibility is needed. */
22776 static struct symtab_index_entry
**
22777 find_slot (struct mapped_symtab
*symtab
, const char *name
)
22779 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
22781 index
= hash
& (symtab
->size
- 1);
22782 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
22786 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
22787 return &symtab
->data
[index
];
22788 index
= (index
+ step
) & (symtab
->size
- 1);
22792 /* Expand SYMTAB's hash table. */
22795 hash_expand (struct mapped_symtab
*symtab
)
22797 offset_type old_size
= symtab
->size
;
22799 struct symtab_index_entry
**old_entries
= symtab
->data
;
22802 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
22804 for (i
= 0; i
< old_size
; ++i
)
22806 if (old_entries
[i
])
22808 struct symtab_index_entry
**slot
= find_slot (symtab
,
22809 old_entries
[i
]->name
);
22810 *slot
= old_entries
[i
];
22814 xfree (old_entries
);
22817 /* Add an entry to SYMTAB. NAME is the name of the symbol.
22818 CU_INDEX is the index of the CU in which the symbol appears.
22819 IS_STATIC is one if the symbol is static, otherwise zero (global). */
22822 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
22823 int is_static
, gdb_index_symbol_kind kind
,
22824 offset_type cu_index
)
22826 struct symtab_index_entry
**slot
;
22827 offset_type cu_index_and_attrs
;
22829 ++symtab
->n_elements
;
22830 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
22831 hash_expand (symtab
);
22833 slot
= find_slot (symtab
, name
);
22836 *slot
= XNEW (struct symtab_index_entry
);
22837 (*slot
)->name
= name
;
22838 /* index_offset is set later. */
22839 (*slot
)->cu_indices
= NULL
;
22842 cu_index_and_attrs
= 0;
22843 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs
, cu_index
);
22844 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs
, is_static
);
22845 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs
, kind
);
22847 /* We don't want to record an index value twice as we want to avoid the
22849 We process all global symbols and then all static symbols
22850 (which would allow us to avoid the duplication by only having to check
22851 the last entry pushed), but a symbol could have multiple kinds in one CU.
22852 To keep things simple we don't worry about the duplication here and
22853 sort and uniqufy the list after we've processed all symbols. */
22854 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index_and_attrs
);
22857 /* qsort helper routine for uniquify_cu_indices. */
22860 offset_type_compare (const void *ap
, const void *bp
)
22862 offset_type a
= *(offset_type
*) ap
;
22863 offset_type b
= *(offset_type
*) bp
;
22865 return (a
> b
) - (b
> a
);
22868 /* Sort and remove duplicates of all symbols' cu_indices lists. */
22871 uniquify_cu_indices (struct mapped_symtab
*symtab
)
22875 for (i
= 0; i
< symtab
->size
; ++i
)
22877 struct symtab_index_entry
*entry
= symtab
->data
[i
];
22880 && entry
->cu_indices
!= NULL
)
22882 unsigned int next_to_insert
, next_to_check
;
22883 offset_type last_value
;
22885 qsort (VEC_address (offset_type
, entry
->cu_indices
),
22886 VEC_length (offset_type
, entry
->cu_indices
),
22887 sizeof (offset_type
), offset_type_compare
);
22889 last_value
= VEC_index (offset_type
, entry
->cu_indices
, 0);
22890 next_to_insert
= 1;
22891 for (next_to_check
= 1;
22892 next_to_check
< VEC_length (offset_type
, entry
->cu_indices
);
22895 if (VEC_index (offset_type
, entry
->cu_indices
, next_to_check
)
22898 last_value
= VEC_index (offset_type
, entry
->cu_indices
,
22900 VEC_replace (offset_type
, entry
->cu_indices
, next_to_insert
,
22905 VEC_truncate (offset_type
, entry
->cu_indices
, next_to_insert
);
22910 /* Add a vector of indices to the constant pool. */
22913 add_indices_to_cpool (htab_t symbol_hash_table
, struct obstack
*cpool
,
22914 struct symtab_index_entry
*entry
)
22918 slot
= htab_find_slot (symbol_hash_table
, entry
, INSERT
);
22921 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
22922 offset_type val
= MAYBE_SWAP (len
);
22927 entry
->index_offset
= obstack_object_size (cpool
);
22929 obstack_grow (cpool
, &val
, sizeof (val
));
22931 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
22934 val
= MAYBE_SWAP (iter
);
22935 obstack_grow (cpool
, &val
, sizeof (val
));
22940 struct symtab_index_entry
*old_entry
22941 = (struct symtab_index_entry
*) *slot
;
22942 entry
->index_offset
= old_entry
->index_offset
;
22945 return entry
->index_offset
;
22948 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
22949 constant pool entries going into the obstack CPOOL. */
22952 write_hash_table (struct mapped_symtab
*symtab
,
22953 struct obstack
*output
, struct obstack
*cpool
)
22956 htab_t symbol_hash_table
;
22959 symbol_hash_table
= create_symbol_hash_table ();
22960 str_table
= create_strtab ();
22962 /* We add all the index vectors to the constant pool first, to
22963 ensure alignment is ok. */
22964 for (i
= 0; i
< symtab
->size
; ++i
)
22966 if (symtab
->data
[i
])
22967 add_indices_to_cpool (symbol_hash_table
, cpool
, symtab
->data
[i
]);
22970 /* Now write out the hash table. */
22971 for (i
= 0; i
< symtab
->size
; ++i
)
22973 offset_type str_off
, vec_off
;
22975 if (symtab
->data
[i
])
22977 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
22978 vec_off
= symtab
->data
[i
]->index_offset
;
22982 /* While 0 is a valid constant pool index, it is not valid
22983 to have 0 for both offsets. */
22988 str_off
= MAYBE_SWAP (str_off
);
22989 vec_off
= MAYBE_SWAP (vec_off
);
22991 obstack_grow (output
, &str_off
, sizeof (str_off
));
22992 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
22995 htab_delete (str_table
);
22996 htab_delete (symbol_hash_table
);
22999 /* Struct to map psymtab to CU index in the index file. */
23000 struct psymtab_cu_index_map
23002 struct partial_symtab
*psymtab
;
23003 unsigned int cu_index
;
23007 hash_psymtab_cu_index (const void *item
)
23009 const struct psymtab_cu_index_map
*map
23010 = (const struct psymtab_cu_index_map
*) item
;
23012 return htab_hash_pointer (map
->psymtab
);
23016 eq_psymtab_cu_index (const void *item_lhs
, const void *item_rhs
)
23018 const struct psymtab_cu_index_map
*lhs
23019 = (const struct psymtab_cu_index_map
*) item_lhs
;
23020 const struct psymtab_cu_index_map
*rhs
23021 = (const struct psymtab_cu_index_map
*) item_rhs
;
23023 return lhs
->psymtab
== rhs
->psymtab
;
23026 /* Helper struct for building the address table. */
23027 struct addrmap_index_data
23029 struct objfile
*objfile
;
23030 struct obstack
*addr_obstack
;
23031 htab_t cu_index_htab
;
23033 /* Non-zero if the previous_* fields are valid.
23034 We can't write an entry until we see the next entry (since it is only then
23035 that we know the end of the entry). */
23036 int previous_valid
;
23037 /* Index of the CU in the table of all CUs in the index file. */
23038 unsigned int previous_cu_index
;
23039 /* Start address of the CU. */
23040 CORE_ADDR previous_cu_start
;
23043 /* Write an address entry to OBSTACK. */
23046 add_address_entry (struct objfile
*objfile
, struct obstack
*obstack
,
23047 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
23049 offset_type cu_index_to_write
;
23051 CORE_ADDR baseaddr
;
23053 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
23055 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
23056 obstack_grow (obstack
, addr
, 8);
23057 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
23058 obstack_grow (obstack
, addr
, 8);
23059 cu_index_to_write
= MAYBE_SWAP (cu_index
);
23060 obstack_grow (obstack
, &cu_index_to_write
, sizeof (offset_type
));
23063 /* Worker function for traversing an addrmap to build the address table. */
23066 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
23068 struct addrmap_index_data
*data
= (struct addrmap_index_data
*) datap
;
23069 struct partial_symtab
*pst
= (struct partial_symtab
*) obj
;
23071 if (data
->previous_valid
)
23072 add_address_entry (data
->objfile
, data
->addr_obstack
,
23073 data
->previous_cu_start
, start_addr
,
23074 data
->previous_cu_index
);
23076 data
->previous_cu_start
= start_addr
;
23079 struct psymtab_cu_index_map find_map
, *map
;
23080 find_map
.psymtab
= pst
;
23081 map
= ((struct psymtab_cu_index_map
*)
23082 htab_find (data
->cu_index_htab
, &find_map
));
23083 gdb_assert (map
!= NULL
);
23084 data
->previous_cu_index
= map
->cu_index
;
23085 data
->previous_valid
= 1;
23088 data
->previous_valid
= 0;
23093 /* Write OBJFILE's address map to OBSTACK.
23094 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
23095 in the index file. */
23098 write_address_map (struct objfile
*objfile
, struct obstack
*obstack
,
23099 htab_t cu_index_htab
)
23101 struct addrmap_index_data addrmap_index_data
;
23103 /* When writing the address table, we have to cope with the fact that
23104 the addrmap iterator only provides the start of a region; we have to
23105 wait until the next invocation to get the start of the next region. */
23107 addrmap_index_data
.objfile
= objfile
;
23108 addrmap_index_data
.addr_obstack
= obstack
;
23109 addrmap_index_data
.cu_index_htab
= cu_index_htab
;
23110 addrmap_index_data
.previous_valid
= 0;
23112 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
23113 &addrmap_index_data
);
23115 /* It's highly unlikely the last entry (end address = 0xff...ff)
23116 is valid, but we should still handle it.
23117 The end address is recorded as the start of the next region, but that
23118 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
23120 if (addrmap_index_data
.previous_valid
)
23121 add_address_entry (objfile
, obstack
,
23122 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
23123 addrmap_index_data
.previous_cu_index
);
23126 /* Return the symbol kind of PSYM. */
23128 static gdb_index_symbol_kind
23129 symbol_kind (struct partial_symbol
*psym
)
23131 domain_enum domain
= PSYMBOL_DOMAIN (psym
);
23132 enum address_class aclass
= PSYMBOL_CLASS (psym
);
23140 return GDB_INDEX_SYMBOL_KIND_FUNCTION
;
23142 return GDB_INDEX_SYMBOL_KIND_TYPE
;
23144 case LOC_CONST_BYTES
:
23145 case LOC_OPTIMIZED_OUT
:
23147 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
23149 /* Note: It's currently impossible to recognize psyms as enum values
23150 short of reading the type info. For now punt. */
23151 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
23153 /* There are other LOC_FOO values that one might want to classify
23154 as variables, but dwarf2read.c doesn't currently use them. */
23155 return GDB_INDEX_SYMBOL_KIND_OTHER
;
23157 case STRUCT_DOMAIN
:
23158 return GDB_INDEX_SYMBOL_KIND_TYPE
;
23160 return GDB_INDEX_SYMBOL_KIND_OTHER
;
23164 /* Add a list of partial symbols to SYMTAB. */
23167 write_psymbols (struct mapped_symtab
*symtab
,
23169 struct partial_symbol
**psymp
,
23171 offset_type cu_index
,
23174 for (; count
-- > 0; ++psymp
)
23176 struct partial_symbol
*psym
= *psymp
;
23179 if (SYMBOL_LANGUAGE (psym
) == language_ada
)
23180 error (_("Ada is not currently supported by the index"));
23182 /* Only add a given psymbol once. */
23183 slot
= htab_find_slot (psyms_seen
, psym
, INSERT
);
23186 gdb_index_symbol_kind kind
= symbol_kind (psym
);
23189 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (psym
),
23190 is_static
, kind
, cu_index
);
23195 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
23196 exception if there is an error. */
23199 write_obstack (FILE *file
, struct obstack
*obstack
)
23201 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
23203 != obstack_object_size (obstack
))
23204 error (_("couldn't data write to file"));
23207 /* Unlink a file if the argument is not NULL. */
23210 unlink_if_set (void *p
)
23212 char **filename
= (char **) p
;
23214 unlink (*filename
);
23217 /* A helper struct used when iterating over debug_types. */
23218 struct signatured_type_index_data
23220 struct objfile
*objfile
;
23221 struct mapped_symtab
*symtab
;
23222 struct obstack
*types_list
;
23227 /* A helper function that writes a single signatured_type to an
23231 write_one_signatured_type (void **slot
, void *d
)
23233 struct signatured_type_index_data
*info
23234 = (struct signatured_type_index_data
*) d
;
23235 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
23236 struct partial_symtab
*psymtab
= entry
->per_cu
.v
.psymtab
;
23239 write_psymbols (info
->symtab
,
23241 info
->objfile
->global_psymbols
.list
23242 + psymtab
->globals_offset
,
23243 psymtab
->n_global_syms
, info
->cu_index
,
23245 write_psymbols (info
->symtab
,
23247 info
->objfile
->static_psymbols
.list
23248 + psymtab
->statics_offset
,
23249 psymtab
->n_static_syms
, info
->cu_index
,
23252 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23253 entry
->per_cu
.offset
.sect_off
);
23254 obstack_grow (info
->types_list
, val
, 8);
23255 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23256 entry
->type_offset_in_tu
.cu_off
);
23257 obstack_grow (info
->types_list
, val
, 8);
23258 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
23259 obstack_grow (info
->types_list
, val
, 8);
23266 /* Recurse into all "included" dependencies and write their symbols as
23267 if they appeared in this psymtab. */
23270 recursively_write_psymbols (struct objfile
*objfile
,
23271 struct partial_symtab
*psymtab
,
23272 struct mapped_symtab
*symtab
,
23274 offset_type cu_index
)
23278 for (i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
23279 if (psymtab
->dependencies
[i
]->user
!= NULL
)
23280 recursively_write_psymbols (objfile
, psymtab
->dependencies
[i
],
23281 symtab
, psyms_seen
, cu_index
);
23283 write_psymbols (symtab
,
23285 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
23286 psymtab
->n_global_syms
, cu_index
,
23288 write_psymbols (symtab
,
23290 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
23291 psymtab
->n_static_syms
, cu_index
,
23295 /* Create an index file for OBJFILE in the directory DIR. */
23298 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
23300 struct cleanup
*cleanup
;
23301 char *filename
, *cleanup_filename
;
23302 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
23303 struct obstack cu_list
, types_cu_list
;
23306 struct mapped_symtab
*symtab
;
23307 offset_type val
, size_of_contents
, total_len
;
23310 htab_t cu_index_htab
;
23311 struct psymtab_cu_index_map
*psymtab_cu_index_map
;
23313 if (dwarf2_per_objfile
->using_index
)
23314 error (_("Cannot use an index to create the index"));
23316 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
23317 error (_("Cannot make an index when the file has multiple .debug_types sections"));
23319 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
23322 if (stat (objfile_name (objfile
), &st
) < 0)
23323 perror_with_name (objfile_name (objfile
));
23325 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile_name (objfile
)),
23326 INDEX_SUFFIX
, (char *) NULL
);
23327 cleanup
= make_cleanup (xfree
, filename
);
23329 out_file
= gdb_fopen_cloexec (filename
, "wb");
23331 error (_("Can't open `%s' for writing"), filename
);
23333 cleanup_filename
= filename
;
23334 make_cleanup (unlink_if_set
, &cleanup_filename
);
23336 symtab
= create_mapped_symtab ();
23337 make_cleanup (cleanup_mapped_symtab
, symtab
);
23339 obstack_init (&addr_obstack
);
23340 make_cleanup_obstack_free (&addr_obstack
);
23342 obstack_init (&cu_list
);
23343 make_cleanup_obstack_free (&cu_list
);
23345 obstack_init (&types_cu_list
);
23346 make_cleanup_obstack_free (&types_cu_list
);
23348 psyms_seen
= htab_create_alloc (100, htab_hash_pointer
, htab_eq_pointer
,
23349 NULL
, xcalloc
, xfree
);
23350 make_cleanup_htab_delete (psyms_seen
);
23352 /* While we're scanning CU's create a table that maps a psymtab pointer
23353 (which is what addrmap records) to its index (which is what is recorded
23354 in the index file). This will later be needed to write the address
23356 cu_index_htab
= htab_create_alloc (100,
23357 hash_psymtab_cu_index
,
23358 eq_psymtab_cu_index
,
23359 NULL
, xcalloc
, xfree
);
23360 make_cleanup_htab_delete (cu_index_htab
);
23361 psymtab_cu_index_map
= XNEWVEC (struct psymtab_cu_index_map
,
23362 dwarf2_per_objfile
->n_comp_units
);
23363 make_cleanup (xfree
, psymtab_cu_index_map
);
23365 /* The CU list is already sorted, so we don't need to do additional
23366 work here. Also, the debug_types entries do not appear in
23367 all_comp_units, but only in their own hash table. */
23368 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
23370 struct dwarf2_per_cu_data
*per_cu
23371 = dwarf2_per_objfile
->all_comp_units
[i
];
23372 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
23374 struct psymtab_cu_index_map
*map
;
23377 /* CU of a shared file from 'dwz -m' may be unused by this main file.
23378 It may be referenced from a local scope but in such case it does not
23379 need to be present in .gdb_index. */
23380 if (psymtab
== NULL
)
23383 if (psymtab
->user
== NULL
)
23384 recursively_write_psymbols (objfile
, psymtab
, symtab
, psyms_seen
, i
);
23386 map
= &psymtab_cu_index_map
[i
];
23387 map
->psymtab
= psymtab
;
23389 slot
= htab_find_slot (cu_index_htab
, map
, INSERT
);
23390 gdb_assert (slot
!= NULL
);
23391 gdb_assert (*slot
== NULL
);
23394 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23395 per_cu
->offset
.sect_off
);
23396 obstack_grow (&cu_list
, val
, 8);
23397 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
23398 obstack_grow (&cu_list
, val
, 8);
23401 /* Dump the address map. */
23402 write_address_map (objfile
, &addr_obstack
, cu_index_htab
);
23404 /* Write out the .debug_type entries, if any. */
23405 if (dwarf2_per_objfile
->signatured_types
)
23407 struct signatured_type_index_data sig_data
;
23409 sig_data
.objfile
= objfile
;
23410 sig_data
.symtab
= symtab
;
23411 sig_data
.types_list
= &types_cu_list
;
23412 sig_data
.psyms_seen
= psyms_seen
;
23413 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
23414 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
23415 write_one_signatured_type
, &sig_data
);
23418 /* Now that we've processed all symbols we can shrink their cu_indices
23420 uniquify_cu_indices (symtab
);
23422 obstack_init (&constant_pool
);
23423 make_cleanup_obstack_free (&constant_pool
);
23424 obstack_init (&symtab_obstack
);
23425 make_cleanup_obstack_free (&symtab_obstack
);
23426 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
23428 obstack_init (&contents
);
23429 make_cleanup_obstack_free (&contents
);
23430 size_of_contents
= 6 * sizeof (offset_type
);
23431 total_len
= size_of_contents
;
23433 /* The version number. */
23434 val
= MAYBE_SWAP (8);
23435 obstack_grow (&contents
, &val
, sizeof (val
));
23437 /* The offset of the CU list from the start of the file. */
23438 val
= MAYBE_SWAP (total_len
);
23439 obstack_grow (&contents
, &val
, sizeof (val
));
23440 total_len
+= obstack_object_size (&cu_list
);
23442 /* The offset of the types CU list from the start of the file. */
23443 val
= MAYBE_SWAP (total_len
);
23444 obstack_grow (&contents
, &val
, sizeof (val
));
23445 total_len
+= obstack_object_size (&types_cu_list
);
23447 /* The offset of the address table from the start of the file. */
23448 val
= MAYBE_SWAP (total_len
);
23449 obstack_grow (&contents
, &val
, sizeof (val
));
23450 total_len
+= obstack_object_size (&addr_obstack
);
23452 /* The offset of the symbol table from the start of the file. */
23453 val
= MAYBE_SWAP (total_len
);
23454 obstack_grow (&contents
, &val
, sizeof (val
));
23455 total_len
+= obstack_object_size (&symtab_obstack
);
23457 /* The offset of the constant pool from the start of the file. */
23458 val
= MAYBE_SWAP (total_len
);
23459 obstack_grow (&contents
, &val
, sizeof (val
));
23460 total_len
+= obstack_object_size (&constant_pool
);
23462 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
23464 write_obstack (out_file
, &contents
);
23465 write_obstack (out_file
, &cu_list
);
23466 write_obstack (out_file
, &types_cu_list
);
23467 write_obstack (out_file
, &addr_obstack
);
23468 write_obstack (out_file
, &symtab_obstack
);
23469 write_obstack (out_file
, &constant_pool
);
23473 /* We want to keep the file, so we set cleanup_filename to NULL
23474 here. See unlink_if_set. */
23475 cleanup_filename
= NULL
;
23477 do_cleanups (cleanup
);
23480 /* Implementation of the `save gdb-index' command.
23482 Note that the file format used by this command is documented in the
23483 GDB manual. Any changes here must be documented there. */
23486 save_gdb_index_command (char *arg
, int from_tty
)
23488 struct objfile
*objfile
;
23491 error (_("usage: save gdb-index DIRECTORY"));
23493 ALL_OBJFILES (objfile
)
23497 /* If the objfile does not correspond to an actual file, skip it. */
23498 if (stat (objfile_name (objfile
), &st
) < 0)
23502 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
23503 dwarf2_objfile_data_key
);
23504 if (dwarf2_per_objfile
)
23509 write_psymtabs_to_index (objfile
, arg
);
23511 CATCH (except
, RETURN_MASK_ERROR
)
23513 exception_fprintf (gdb_stderr
, except
,
23514 _("Error while writing index for `%s': "),
23515 objfile_name (objfile
));
23524 int dwarf_always_disassemble
;
23527 show_dwarf_always_disassemble (struct ui_file
*file
, int from_tty
,
23528 struct cmd_list_element
*c
, const char *value
)
23530 fprintf_filtered (file
,
23531 _("Whether to always disassemble "
23532 "DWARF expressions is %s.\n"),
23537 show_check_physname (struct ui_file
*file
, int from_tty
,
23538 struct cmd_list_element
*c
, const char *value
)
23540 fprintf_filtered (file
,
23541 _("Whether to check \"physname\" is %s.\n"),
23545 void _initialize_dwarf2_read (void);
23548 _initialize_dwarf2_read (void)
23550 struct cmd_list_element
*c
;
23552 dwarf2_objfile_data_key
23553 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
23555 add_prefix_cmd ("dwarf", class_maintenance
, set_dwarf_cmd
, _("\
23556 Set DWARF specific variables.\n\
23557 Configure DWARF variables such as the cache size"),
23558 &set_dwarf_cmdlist
, "maintenance set dwarf ",
23559 0/*allow-unknown*/, &maintenance_set_cmdlist
);
23561 add_prefix_cmd ("dwarf", class_maintenance
, show_dwarf_cmd
, _("\
23562 Show DWARF specific variables\n\
23563 Show DWARF variables such as the cache size"),
23564 &show_dwarf_cmdlist
, "maintenance show dwarf ",
23565 0/*allow-unknown*/, &maintenance_show_cmdlist
);
23567 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
23568 &dwarf_max_cache_age
, _("\
23569 Set the upper bound on the age of cached DWARF compilation units."), _("\
23570 Show the upper bound on the age of cached DWARF compilation units."), _("\
23571 A higher limit means that cached compilation units will be stored\n\
23572 in memory longer, and more total memory will be used. Zero disables\n\
23573 caching, which can slow down startup."),
23575 show_dwarf_max_cache_age
,
23576 &set_dwarf_cmdlist
,
23577 &show_dwarf_cmdlist
);
23579 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
23580 &dwarf_always_disassemble
, _("\
23581 Set whether `info address' always disassembles DWARF expressions."), _("\
23582 Show whether `info address' always disassembles DWARF expressions."), _("\
23583 When enabled, DWARF expressions are always printed in an assembly-like\n\
23584 syntax. When disabled, expressions will be printed in a more\n\
23585 conversational style, when possible."),
23587 show_dwarf_always_disassemble
,
23588 &set_dwarf_cmdlist
,
23589 &show_dwarf_cmdlist
);
23591 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
23592 Set debugging of the DWARF reader."), _("\
23593 Show debugging of the DWARF reader."), _("\
23594 When enabled (non-zero), debugging messages are printed during DWARF\n\
23595 reading and symtab expansion. A value of 1 (one) provides basic\n\
23596 information. A value greater than 1 provides more verbose information."),
23599 &setdebuglist
, &showdebuglist
);
23601 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
23602 Set debugging of the DWARF DIE reader."), _("\
23603 Show debugging of the DWARF DIE reader."), _("\
23604 When enabled (non-zero), DIEs are dumped after they are read in.\n\
23605 The value is the maximum depth to print."),
23608 &setdebuglist
, &showdebuglist
);
23610 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
23611 Set debugging of the dwarf line reader."), _("\
23612 Show debugging of the dwarf line reader."), _("\
23613 When enabled (non-zero), line number entries are dumped as they are read in.\n\
23614 A value of 1 (one) provides basic information.\n\
23615 A value greater than 1 provides more verbose information."),
23618 &setdebuglist
, &showdebuglist
);
23620 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
23621 Set cross-checking of \"physname\" code against demangler."), _("\
23622 Show cross-checking of \"physname\" code against demangler."), _("\
23623 When enabled, GDB's internal \"physname\" code is checked against\n\
23625 NULL
, show_check_physname
,
23626 &setdebuglist
, &showdebuglist
);
23628 add_setshow_boolean_cmd ("use-deprecated-index-sections",
23629 no_class
, &use_deprecated_index_sections
, _("\
23630 Set whether to use deprecated gdb_index sections."), _("\
23631 Show whether to use deprecated gdb_index sections."), _("\
23632 When enabled, deprecated .gdb_index sections are used anyway.\n\
23633 Normally they are ignored either because of a missing feature or\n\
23634 performance issue.\n\
23635 Warning: This option must be enabled before gdb reads the file."),
23638 &setlist
, &showlist
);
23640 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
23642 Save a gdb-index file.\n\
23643 Usage: save gdb-index DIRECTORY"),
23645 set_cmd_completer (c
, filename_completer
);
23647 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23648 &dwarf2_locexpr_funcs
);
23649 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23650 &dwarf2_loclist_funcs
);
23652 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23653 &dwarf2_block_frame_base_locexpr_funcs
);
23654 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23655 &dwarf2_block_frame_base_loclist_funcs
);