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 const char *filename
= get_section_file_name (section
);
4386 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
4387 error (_("Dwarf Error: wrong version in compilation unit header "
4388 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
4391 if (header
->abbrev_offset
.sect_off
4392 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
4393 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
4394 "(offset 0x%lx + 6) [in module %s]"),
4395 (long) header
->abbrev_offset
.sect_off
, (long) header
->offset
.sect_off
,
4398 /* Cast to unsigned long to use 64-bit arithmetic when possible to
4399 avoid potential 32-bit overflow. */
4400 if (((unsigned long) header
->offset
.sect_off
+ get_cu_length (header
))
4402 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
4403 "(offset 0x%lx + 0) [in module %s]"),
4404 (long) header
->length
, (long) header
->offset
.sect_off
,
4408 /* Read in a CU/TU header and perform some basic error checking.
4409 The contents of the header are stored in HEADER.
4410 The result is a pointer to the start of the first DIE. */
4412 static const gdb_byte
*
4413 read_and_check_comp_unit_head (struct comp_unit_head
*header
,
4414 struct dwarf2_section_info
*section
,
4415 struct dwarf2_section_info
*abbrev_section
,
4416 const gdb_byte
*info_ptr
,
4417 int is_debug_types_section
)
4419 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
4420 bfd
*abfd
= get_section_bfd_owner (section
);
4422 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4424 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
4426 /* If we're reading a type unit, skip over the signature and
4427 type_offset fields. */
4428 if (is_debug_types_section
)
4429 info_ptr
+= 8 /*signature*/ + header
->offset_size
;
4431 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4433 error_check_comp_unit_head (header
, section
, abbrev_section
);
4438 /* Read in the types comp unit header information from .debug_types entry at
4439 types_ptr. The result is a pointer to one past the end of the header. */
4441 static const gdb_byte
*
4442 read_and_check_type_unit_head (struct comp_unit_head
*header
,
4443 struct dwarf2_section_info
*section
,
4444 struct dwarf2_section_info
*abbrev_section
,
4445 const gdb_byte
*info_ptr
,
4446 ULONGEST
*signature
,
4447 cu_offset
*type_offset_in_tu
)
4449 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
4450 bfd
*abfd
= get_section_bfd_owner (section
);
4452 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4454 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
4456 /* If we're reading a type unit, skip over the signature and
4457 type_offset fields. */
4458 if (signature
!= NULL
)
4459 *signature
= read_8_bytes (abfd
, info_ptr
);
4461 if (type_offset_in_tu
!= NULL
)
4462 type_offset_in_tu
->cu_off
= read_offset_1 (abfd
, info_ptr
,
4463 header
->offset_size
);
4464 info_ptr
+= header
->offset_size
;
4466 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4468 error_check_comp_unit_head (header
, section
, abbrev_section
);
4473 /* Fetch the abbreviation table offset from a comp or type unit header. */
4476 read_abbrev_offset (struct dwarf2_section_info
*section
,
4479 bfd
*abfd
= get_section_bfd_owner (section
);
4480 const gdb_byte
*info_ptr
;
4481 unsigned int length
, initial_length_size
, offset_size
;
4482 sect_offset abbrev_offset
;
4484 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
4485 info_ptr
= section
->buffer
+ offset
.sect_off
;
4486 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
4487 offset_size
= initial_length_size
== 4 ? 4 : 8;
4488 info_ptr
+= initial_length_size
+ 2 /*version*/;
4489 abbrev_offset
.sect_off
= read_offset_1 (abfd
, info_ptr
, offset_size
);
4490 return abbrev_offset
;
4493 /* Allocate a new partial symtab for file named NAME and mark this new
4494 partial symtab as being an include of PST. */
4497 dwarf2_create_include_psymtab (const char *name
, struct partial_symtab
*pst
,
4498 struct objfile
*objfile
)
4500 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
4502 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
4504 /* It shares objfile->objfile_obstack. */
4505 subpst
->dirname
= pst
->dirname
;
4508 subpst
->textlow
= 0;
4509 subpst
->texthigh
= 0;
4511 subpst
->dependencies
4512 = XOBNEW (&objfile
->objfile_obstack
, struct partial_symtab
*);
4513 subpst
->dependencies
[0] = pst
;
4514 subpst
->number_of_dependencies
= 1;
4516 subpst
->globals_offset
= 0;
4517 subpst
->n_global_syms
= 0;
4518 subpst
->statics_offset
= 0;
4519 subpst
->n_static_syms
= 0;
4520 subpst
->compunit_symtab
= NULL
;
4521 subpst
->read_symtab
= pst
->read_symtab
;
4524 /* No private part is necessary for include psymtabs. This property
4525 can be used to differentiate between such include psymtabs and
4526 the regular ones. */
4527 subpst
->read_symtab_private
= NULL
;
4530 /* Read the Line Number Program data and extract the list of files
4531 included by the source file represented by PST. Build an include
4532 partial symtab for each of these included files. */
4535 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
4536 struct die_info
*die
,
4537 struct partial_symtab
*pst
)
4539 struct line_header
*lh
= NULL
;
4540 struct attribute
*attr
;
4542 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
4544 lh
= dwarf_decode_line_header (DW_UNSND (attr
), cu
);
4546 return; /* No linetable, so no includes. */
4548 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
4549 dwarf_decode_lines (lh
, pst
->dirname
, cu
, pst
, pst
->textlow
, 1);
4551 free_line_header (lh
);
4555 hash_signatured_type (const void *item
)
4557 const struct signatured_type
*sig_type
4558 = (const struct signatured_type
*) item
;
4560 /* This drops the top 32 bits of the signature, but is ok for a hash. */
4561 return sig_type
->signature
;
4565 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
4567 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
4568 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
4570 return lhs
->signature
== rhs
->signature
;
4573 /* Allocate a hash table for signatured types. */
4576 allocate_signatured_type_table (struct objfile
*objfile
)
4578 return htab_create_alloc_ex (41,
4579 hash_signatured_type
,
4582 &objfile
->objfile_obstack
,
4583 hashtab_obstack_allocate
,
4584 dummy_obstack_deallocate
);
4587 /* A helper function to add a signatured type CU to a table. */
4590 add_signatured_type_cu_to_table (void **slot
, void *datum
)
4592 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
4593 struct signatured_type
***datap
= (struct signatured_type
***) datum
;
4601 /* Create the hash table of all entries in the .debug_types
4602 (or .debug_types.dwo) section(s).
4603 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
4604 otherwise it is NULL.
4606 The result is a pointer to the hash table or NULL if there are no types.
4608 Note: This function processes DWO files only, not DWP files. */
4611 create_debug_types_hash_table (struct dwo_file
*dwo_file
,
4612 VEC (dwarf2_section_info_def
) *types
)
4614 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4615 htab_t types_htab
= NULL
;
4617 struct dwarf2_section_info
*section
;
4618 struct dwarf2_section_info
*abbrev_section
;
4620 if (VEC_empty (dwarf2_section_info_def
, types
))
4623 abbrev_section
= (dwo_file
!= NULL
4624 ? &dwo_file
->sections
.abbrev
4625 : &dwarf2_per_objfile
->abbrev
);
4627 if (dwarf_read_debug
)
4628 fprintf_unfiltered (gdb_stdlog
, "Reading .debug_types%s for %s:\n",
4629 dwo_file
? ".dwo" : "",
4630 get_section_file_name (abbrev_section
));
4633 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
4637 const gdb_byte
*info_ptr
, *end_ptr
;
4639 dwarf2_read_section (objfile
, section
);
4640 info_ptr
= section
->buffer
;
4642 if (info_ptr
== NULL
)
4645 /* We can't set abfd until now because the section may be empty or
4646 not present, in which case the bfd is unknown. */
4647 abfd
= get_section_bfd_owner (section
);
4649 /* We don't use init_cutu_and_read_dies_simple, or some such, here
4650 because we don't need to read any dies: the signature is in the
4653 end_ptr
= info_ptr
+ section
->size
;
4654 while (info_ptr
< end_ptr
)
4657 cu_offset type_offset_in_tu
;
4659 struct signatured_type
*sig_type
;
4660 struct dwo_unit
*dwo_tu
;
4662 const gdb_byte
*ptr
= info_ptr
;
4663 struct comp_unit_head header
;
4664 unsigned int length
;
4666 offset
.sect_off
= ptr
- section
->buffer
;
4668 /* We need to read the type's signature in order to build the hash
4669 table, but we don't need anything else just yet. */
4671 ptr
= read_and_check_type_unit_head (&header
, section
,
4672 abbrev_section
, ptr
,
4673 &signature
, &type_offset_in_tu
);
4675 length
= get_cu_length (&header
);
4677 /* Skip dummy type units. */
4678 if (ptr
>= info_ptr
+ length
4679 || peek_abbrev_code (abfd
, ptr
) == 0)
4685 if (types_htab
== NULL
)
4688 types_htab
= allocate_dwo_unit_table (objfile
);
4690 types_htab
= allocate_signatured_type_table (objfile
);
4696 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4698 dwo_tu
->dwo_file
= dwo_file
;
4699 dwo_tu
->signature
= signature
;
4700 dwo_tu
->type_offset_in_tu
= type_offset_in_tu
;
4701 dwo_tu
->section
= section
;
4702 dwo_tu
->offset
= offset
;
4703 dwo_tu
->length
= length
;
4707 /* N.B.: type_offset is not usable if this type uses a DWO file.
4708 The real type_offset is in the DWO file. */
4710 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4711 struct signatured_type
);
4712 sig_type
->signature
= signature
;
4713 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
4714 sig_type
->per_cu
.objfile
= objfile
;
4715 sig_type
->per_cu
.is_debug_types
= 1;
4716 sig_type
->per_cu
.section
= section
;
4717 sig_type
->per_cu
.offset
= offset
;
4718 sig_type
->per_cu
.length
= length
;
4721 slot
= htab_find_slot (types_htab
,
4722 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
4724 gdb_assert (slot
!= NULL
);
4727 sect_offset dup_offset
;
4731 const struct dwo_unit
*dup_tu
4732 = (const struct dwo_unit
*) *slot
;
4734 dup_offset
= dup_tu
->offset
;
4738 const struct signatured_type
*dup_tu
4739 = (const struct signatured_type
*) *slot
;
4741 dup_offset
= dup_tu
->per_cu
.offset
;
4744 complaint (&symfile_complaints
,
4745 _("debug type entry at offset 0x%x is duplicate to"
4746 " the entry at offset 0x%x, signature %s"),
4747 offset
.sect_off
, dup_offset
.sect_off
,
4748 hex_string (signature
));
4750 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
4752 if (dwarf_read_debug
> 1)
4753 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature %s\n",
4755 hex_string (signature
));
4764 /* Create the hash table of all entries in the .debug_types section,
4765 and initialize all_type_units.
4766 The result is zero if there is an error (e.g. missing .debug_types section),
4767 otherwise non-zero. */
4770 create_all_type_units (struct objfile
*objfile
)
4773 struct signatured_type
**iter
;
4775 types_htab
= create_debug_types_hash_table (NULL
, dwarf2_per_objfile
->types
);
4776 if (types_htab
== NULL
)
4778 dwarf2_per_objfile
->signatured_types
= NULL
;
4782 dwarf2_per_objfile
->signatured_types
= types_htab
;
4784 dwarf2_per_objfile
->n_type_units
4785 = dwarf2_per_objfile
->n_allocated_type_units
4786 = htab_elements (types_htab
);
4787 dwarf2_per_objfile
->all_type_units
=
4788 XNEWVEC (struct signatured_type
*, dwarf2_per_objfile
->n_type_units
);
4789 iter
= &dwarf2_per_objfile
->all_type_units
[0];
4790 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
4791 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
4792 == dwarf2_per_objfile
->n_type_units
);
4797 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
4798 If SLOT is non-NULL, it is the entry to use in the hash table.
4799 Otherwise we find one. */
4801 static struct signatured_type
*
4802 add_type_unit (ULONGEST sig
, void **slot
)
4804 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4805 int n_type_units
= dwarf2_per_objfile
->n_type_units
;
4806 struct signatured_type
*sig_type
;
4808 gdb_assert (n_type_units
<= dwarf2_per_objfile
->n_allocated_type_units
);
4810 if (n_type_units
> dwarf2_per_objfile
->n_allocated_type_units
)
4812 if (dwarf2_per_objfile
->n_allocated_type_units
== 0)
4813 dwarf2_per_objfile
->n_allocated_type_units
= 1;
4814 dwarf2_per_objfile
->n_allocated_type_units
*= 2;
4815 dwarf2_per_objfile
->all_type_units
4816 = XRESIZEVEC (struct signatured_type
*,
4817 dwarf2_per_objfile
->all_type_units
,
4818 dwarf2_per_objfile
->n_allocated_type_units
);
4819 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
4821 dwarf2_per_objfile
->n_type_units
= n_type_units
;
4823 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4824 struct signatured_type
);
4825 dwarf2_per_objfile
->all_type_units
[n_type_units
- 1] = sig_type
;
4826 sig_type
->signature
= sig
;
4827 sig_type
->per_cu
.is_debug_types
= 1;
4828 if (dwarf2_per_objfile
->using_index
)
4830 sig_type
->per_cu
.v
.quick
=
4831 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4832 struct dwarf2_per_cu_quick_data
);
4837 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4840 gdb_assert (*slot
== NULL
);
4842 /* The rest of sig_type must be filled in by the caller. */
4846 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
4847 Fill in SIG_ENTRY with DWO_ENTRY. */
4850 fill_in_sig_entry_from_dwo_entry (struct objfile
*objfile
,
4851 struct signatured_type
*sig_entry
,
4852 struct dwo_unit
*dwo_entry
)
4854 /* Make sure we're not clobbering something we don't expect to. */
4855 gdb_assert (! sig_entry
->per_cu
.queued
);
4856 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
4857 if (dwarf2_per_objfile
->using_index
)
4859 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
4860 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
4863 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
4864 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
4865 gdb_assert (sig_entry
->type_offset_in_section
.sect_off
== 0);
4866 gdb_assert (sig_entry
->type_unit_group
== NULL
);
4867 gdb_assert (sig_entry
->dwo_unit
== NULL
);
4869 sig_entry
->per_cu
.section
= dwo_entry
->section
;
4870 sig_entry
->per_cu
.offset
= dwo_entry
->offset
;
4871 sig_entry
->per_cu
.length
= dwo_entry
->length
;
4872 sig_entry
->per_cu
.reading_dwo_directly
= 1;
4873 sig_entry
->per_cu
.objfile
= objfile
;
4874 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
4875 sig_entry
->dwo_unit
= dwo_entry
;
4878 /* Subroutine of lookup_signatured_type.
4879 If we haven't read the TU yet, create the signatured_type data structure
4880 for a TU to be read in directly from a DWO file, bypassing the stub.
4881 This is the "Stay in DWO Optimization": When there is no DWP file and we're
4882 using .gdb_index, then when reading a CU we want to stay in the DWO file
4883 containing that CU. Otherwise we could end up reading several other DWO
4884 files (due to comdat folding) to process the transitive closure of all the
4885 mentioned TUs, and that can be slow. The current DWO file will have every
4886 type signature that it needs.
4887 We only do this for .gdb_index because in the psymtab case we already have
4888 to read all the DWOs to build the type unit groups. */
4890 static struct signatured_type
*
4891 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4893 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4894 struct dwo_file
*dwo_file
;
4895 struct dwo_unit find_dwo_entry
, *dwo_entry
;
4896 struct signatured_type find_sig_entry
, *sig_entry
;
4899 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
4901 /* If TU skeletons have been removed then we may not have read in any
4903 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4905 dwarf2_per_objfile
->signatured_types
4906 = allocate_signatured_type_table (objfile
);
4909 /* We only ever need to read in one copy of a signatured type.
4910 Use the global signatured_types array to do our own comdat-folding
4911 of types. If this is the first time we're reading this TU, and
4912 the TU has an entry in .gdb_index, replace the recorded data from
4913 .gdb_index with this TU. */
4915 find_sig_entry
.signature
= sig
;
4916 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4917 &find_sig_entry
, INSERT
);
4918 sig_entry
= (struct signatured_type
*) *slot
;
4920 /* We can get here with the TU already read, *or* in the process of being
4921 read. Don't reassign the global entry to point to this DWO if that's
4922 the case. Also note that if the TU is already being read, it may not
4923 have come from a DWO, the program may be a mix of Fission-compiled
4924 code and non-Fission-compiled code. */
4926 /* Have we already tried to read this TU?
4927 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
4928 needn't exist in the global table yet). */
4929 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
4932 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
4933 dwo_unit of the TU itself. */
4934 dwo_file
= cu
->dwo_unit
->dwo_file
;
4936 /* Ok, this is the first time we're reading this TU. */
4937 if (dwo_file
->tus
== NULL
)
4939 find_dwo_entry
.signature
= sig
;
4940 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_entry
);
4941 if (dwo_entry
== NULL
)
4944 /* If the global table doesn't have an entry for this TU, add one. */
4945 if (sig_entry
== NULL
)
4946 sig_entry
= add_type_unit (sig
, slot
);
4948 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
4949 sig_entry
->per_cu
.tu_read
= 1;
4953 /* Subroutine of lookup_signatured_type.
4954 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
4955 then try the DWP file. If the TU stub (skeleton) has been removed then
4956 it won't be in .gdb_index. */
4958 static struct signatured_type
*
4959 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4961 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4962 struct dwp_file
*dwp_file
= get_dwp_file ();
4963 struct dwo_unit
*dwo_entry
;
4964 struct signatured_type find_sig_entry
, *sig_entry
;
4967 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
4968 gdb_assert (dwp_file
!= NULL
);
4970 /* If TU skeletons have been removed then we may not have read in any
4972 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4974 dwarf2_per_objfile
->signatured_types
4975 = allocate_signatured_type_table (objfile
);
4978 find_sig_entry
.signature
= sig
;
4979 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4980 &find_sig_entry
, INSERT
);
4981 sig_entry
= (struct signatured_type
*) *slot
;
4983 /* Have we already tried to read this TU?
4984 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
4985 needn't exist in the global table yet). */
4986 if (sig_entry
!= NULL
)
4989 if (dwp_file
->tus
== NULL
)
4991 dwo_entry
= lookup_dwo_unit_in_dwp (dwp_file
, NULL
,
4992 sig
, 1 /* is_debug_types */);
4993 if (dwo_entry
== NULL
)
4996 sig_entry
= add_type_unit (sig
, slot
);
4997 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
5002 /* Lookup a signature based type for DW_FORM_ref_sig8.
5003 Returns NULL if signature SIG is not present in the table.
5004 It is up to the caller to complain about this. */
5006 static struct signatured_type
*
5007 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
5010 && dwarf2_per_objfile
->using_index
)
5012 /* We're in a DWO/DWP file, and we're using .gdb_index.
5013 These cases require special processing. */
5014 if (get_dwp_file () == NULL
)
5015 return lookup_dwo_signatured_type (cu
, sig
);
5017 return lookup_dwp_signatured_type (cu
, sig
);
5021 struct signatured_type find_entry
, *entry
;
5023 if (dwarf2_per_objfile
->signatured_types
== NULL
)
5025 find_entry
.signature
= sig
;
5026 entry
= ((struct signatured_type
*)
5027 htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
));
5032 /* Low level DIE reading support. */
5034 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
5037 init_cu_die_reader (struct die_reader_specs
*reader
,
5038 struct dwarf2_cu
*cu
,
5039 struct dwarf2_section_info
*section
,
5040 struct dwo_file
*dwo_file
)
5042 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
5043 reader
->abfd
= get_section_bfd_owner (section
);
5045 reader
->dwo_file
= dwo_file
;
5046 reader
->die_section
= section
;
5047 reader
->buffer
= section
->buffer
;
5048 reader
->buffer_end
= section
->buffer
+ section
->size
;
5049 reader
->comp_dir
= NULL
;
5052 /* Subroutine of init_cutu_and_read_dies to simplify it.
5053 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
5054 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
5057 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
5058 from it to the DIE in the DWO. If NULL we are skipping the stub.
5059 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
5060 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
5061 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
5062 STUB_COMP_DIR may be non-NULL.
5063 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
5064 are filled in with the info of the DIE from the DWO file.
5065 ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies
5066 provided an abbrev table to use.
5067 The result is non-zero if a valid (non-dummy) DIE was found. */
5070 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
5071 struct dwo_unit
*dwo_unit
,
5072 int abbrev_table_provided
,
5073 struct die_info
*stub_comp_unit_die
,
5074 const char *stub_comp_dir
,
5075 struct die_reader_specs
*result_reader
,
5076 const gdb_byte
**result_info_ptr
,
5077 struct die_info
**result_comp_unit_die
,
5078 int *result_has_children
)
5080 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5081 struct dwarf2_cu
*cu
= this_cu
->cu
;
5082 struct dwarf2_section_info
*section
;
5084 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5085 ULONGEST signature
; /* Or dwo_id. */
5086 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
5087 int i
,num_extra_attrs
;
5088 struct dwarf2_section_info
*dwo_abbrev_section
;
5089 struct attribute
*attr
;
5090 struct die_info
*comp_unit_die
;
5092 /* At most one of these may be provided. */
5093 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
5095 /* These attributes aren't processed until later:
5096 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
5097 DW_AT_comp_dir is used now, to find the DWO file, but it is also
5098 referenced later. However, these attributes are found in the stub
5099 which we won't have later. In order to not impose this complication
5100 on the rest of the code, we read them here and copy them to the
5109 if (stub_comp_unit_die
!= NULL
)
5111 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
5113 if (! this_cu
->is_debug_types
)
5114 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
5115 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
5116 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
5117 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
5118 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
5120 /* There should be a DW_AT_addr_base attribute here (if needed).
5121 We need the value before we can process DW_FORM_GNU_addr_index. */
5123 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
5125 cu
->addr_base
= DW_UNSND (attr
);
5127 /* There should be a DW_AT_ranges_base attribute here (if needed).
5128 We need the value before we can process DW_AT_ranges. */
5129 cu
->ranges_base
= 0;
5130 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
5132 cu
->ranges_base
= DW_UNSND (attr
);
5134 else if (stub_comp_dir
!= NULL
)
5136 /* Reconstruct the comp_dir attribute to simplify the code below. */
5137 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
5138 comp_dir
->name
= DW_AT_comp_dir
;
5139 comp_dir
->form
= DW_FORM_string
;
5140 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
5141 DW_STRING (comp_dir
) = stub_comp_dir
;
5144 /* Set up for reading the DWO CU/TU. */
5145 cu
->dwo_unit
= dwo_unit
;
5146 section
= dwo_unit
->section
;
5147 dwarf2_read_section (objfile
, section
);
5148 abfd
= get_section_bfd_owner (section
);
5149 begin_info_ptr
= info_ptr
= section
->buffer
+ dwo_unit
->offset
.sect_off
;
5150 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
5151 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
);
5153 if (this_cu
->is_debug_types
)
5155 ULONGEST header_signature
;
5156 cu_offset type_offset_in_tu
;
5157 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
5159 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
5163 &type_offset_in_tu
);
5164 /* This is not an assert because it can be caused by bad debug info. */
5165 if (sig_type
->signature
!= header_signature
)
5167 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
5168 " TU at offset 0x%x [in module %s]"),
5169 hex_string (sig_type
->signature
),
5170 hex_string (header_signature
),
5171 dwo_unit
->offset
.sect_off
,
5172 bfd_get_filename (abfd
));
5174 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5175 /* For DWOs coming from DWP files, we don't know the CU length
5176 nor the type's offset in the TU until now. */
5177 dwo_unit
->length
= get_cu_length (&cu
->header
);
5178 dwo_unit
->type_offset_in_tu
= type_offset_in_tu
;
5180 /* Establish the type offset that can be used to lookup the type.
5181 For DWO files, we don't know it until now. */
5182 sig_type
->type_offset_in_section
.sect_off
=
5183 dwo_unit
->offset
.sect_off
+ dwo_unit
->type_offset_in_tu
.cu_off
;
5187 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5190 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5191 /* For DWOs coming from DWP files, we don't know the CU length
5193 dwo_unit
->length
= get_cu_length (&cu
->header
);
5196 /* Replace the CU's original abbrev table with the DWO's.
5197 Reminder: We can't read the abbrev table until we've read the header. */
5198 if (abbrev_table_provided
)
5200 /* Don't free the provided abbrev table, the caller of
5201 init_cutu_and_read_dies owns it. */
5202 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5203 /* Ensure the DWO abbrev table gets freed. */
5204 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5208 dwarf2_free_abbrev_table (cu
);
5209 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5210 /* Leave any existing abbrev table cleanup as is. */
5213 /* Read in the die, but leave space to copy over the attributes
5214 from the stub. This has the benefit of simplifying the rest of
5215 the code - all the work to maintain the illusion of a single
5216 DW_TAG_{compile,type}_unit DIE is done here. */
5217 num_extra_attrs
= ((stmt_list
!= NULL
)
5221 + (comp_dir
!= NULL
));
5222 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
5223 result_has_children
, num_extra_attrs
);
5225 /* Copy over the attributes from the stub to the DIE we just read in. */
5226 comp_unit_die
= *result_comp_unit_die
;
5227 i
= comp_unit_die
->num_attrs
;
5228 if (stmt_list
!= NULL
)
5229 comp_unit_die
->attrs
[i
++] = *stmt_list
;
5231 comp_unit_die
->attrs
[i
++] = *low_pc
;
5232 if (high_pc
!= NULL
)
5233 comp_unit_die
->attrs
[i
++] = *high_pc
;
5235 comp_unit_die
->attrs
[i
++] = *ranges
;
5236 if (comp_dir
!= NULL
)
5237 comp_unit_die
->attrs
[i
++] = *comp_dir
;
5238 comp_unit_die
->num_attrs
+= num_extra_attrs
;
5240 if (dwarf_die_debug
)
5242 fprintf_unfiltered (gdb_stdlog
,
5243 "Read die from %s@0x%x of %s:\n",
5244 get_section_name (section
),
5245 (unsigned) (begin_info_ptr
- section
->buffer
),
5246 bfd_get_filename (abfd
));
5247 dump_die (comp_unit_die
, dwarf_die_debug
);
5250 /* Save the comp_dir attribute. If there is no DWP file then we'll read
5251 TUs by skipping the stub and going directly to the entry in the DWO file.
5252 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
5253 to get it via circuitous means. Blech. */
5254 if (comp_dir
!= NULL
)
5255 result_reader
->comp_dir
= DW_STRING (comp_dir
);
5257 /* Skip dummy compilation units. */
5258 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
5259 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5262 *result_info_ptr
= info_ptr
;
5266 /* Subroutine of init_cutu_and_read_dies to simplify it.
5267 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
5268 Returns NULL if the specified DWO unit cannot be found. */
5270 static struct dwo_unit
*
5271 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
5272 struct die_info
*comp_unit_die
)
5274 struct dwarf2_cu
*cu
= this_cu
->cu
;
5275 struct attribute
*attr
;
5277 struct dwo_unit
*dwo_unit
;
5278 const char *comp_dir
, *dwo_name
;
5280 gdb_assert (cu
!= NULL
);
5282 /* Yeah, we look dwo_name up again, but it simplifies the code. */
5283 dwo_name
= dwarf2_string_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5284 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
5286 if (this_cu
->is_debug_types
)
5288 struct signatured_type
*sig_type
;
5290 /* Since this_cu is the first member of struct signatured_type,
5291 we can go from a pointer to one to a pointer to the other. */
5292 sig_type
= (struct signatured_type
*) this_cu
;
5293 signature
= sig_type
->signature
;
5294 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
5298 struct attribute
*attr
;
5300 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
5302 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
5304 dwo_name
, objfile_name (this_cu
->objfile
));
5305 signature
= DW_UNSND (attr
);
5306 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
5313 /* Subroutine of init_cutu_and_read_dies to simplify it.
5314 See it for a description of the parameters.
5315 Read a TU directly from a DWO file, bypassing the stub.
5317 Note: This function could be a little bit simpler if we shared cleanups
5318 with our caller, init_cutu_and_read_dies. That's generally a fragile thing
5319 to do, so we keep this function self-contained. Or we could move this
5320 into our caller, but it's complex enough already. */
5323 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
5324 int use_existing_cu
, int keep
,
5325 die_reader_func_ftype
*die_reader_func
,
5328 struct dwarf2_cu
*cu
;
5329 struct signatured_type
*sig_type
;
5330 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5331 struct die_reader_specs reader
;
5332 const gdb_byte
*info_ptr
;
5333 struct die_info
*comp_unit_die
;
5336 /* Verify we can do the following downcast, and that we have the
5338 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
5339 sig_type
= (struct signatured_type
*) this_cu
;
5340 gdb_assert (sig_type
->dwo_unit
!= NULL
);
5342 cleanups
= make_cleanup (null_cleanup
, NULL
);
5344 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5346 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
5348 /* There's no need to do the rereading_dwo_cu handling that
5349 init_cutu_and_read_dies does since we don't read the stub. */
5353 /* If !use_existing_cu, this_cu->cu must be NULL. */
5354 gdb_assert (this_cu
->cu
== NULL
);
5355 cu
= XNEW (struct dwarf2_cu
);
5356 init_one_comp_unit (cu
, this_cu
);
5357 /* If an error occurs while loading, release our storage. */
5358 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5361 /* A future optimization, if needed, would be to use an existing
5362 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
5363 could share abbrev tables. */
5365 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
5366 0 /* abbrev_table_provided */,
5367 NULL
/* stub_comp_unit_die */,
5368 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
5370 &comp_unit_die
, &has_children
) == 0)
5373 do_cleanups (cleanups
);
5377 /* All the "real" work is done here. */
5378 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5380 /* This duplicates the code in init_cutu_and_read_dies,
5381 but the alternative is making the latter more complex.
5382 This function is only for the special case of using DWO files directly:
5383 no point in overly complicating the general case just to handle this. */
5384 if (free_cu_cleanup
!= NULL
)
5388 /* We've successfully allocated this compilation unit. Let our
5389 caller clean it up when finished with it. */
5390 discard_cleanups (free_cu_cleanup
);
5392 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5393 So we have to manually free the abbrev table. */
5394 dwarf2_free_abbrev_table (cu
);
5396 /* Link this CU into read_in_chain. */
5397 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5398 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5401 do_cleanups (free_cu_cleanup
);
5404 do_cleanups (cleanups
);
5407 /* Initialize a CU (or TU) and read its DIEs.
5408 If the CU defers to a DWO file, read the DWO file as well.
5410 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
5411 Otherwise the table specified in the comp unit header is read in and used.
5412 This is an optimization for when we already have the abbrev table.
5414 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
5415 Otherwise, a new CU is allocated with xmalloc.
5417 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
5418 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
5420 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5421 linker) then DIE_READER_FUNC will not get called. */
5424 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
5425 struct abbrev_table
*abbrev_table
,
5426 int use_existing_cu
, int keep
,
5427 die_reader_func_ftype
*die_reader_func
,
5430 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5431 struct dwarf2_section_info
*section
= this_cu
->section
;
5432 bfd
*abfd
= get_section_bfd_owner (section
);
5433 struct dwarf2_cu
*cu
;
5434 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5435 struct die_reader_specs reader
;
5436 struct die_info
*comp_unit_die
;
5438 struct attribute
*attr
;
5439 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5440 struct signatured_type
*sig_type
= NULL
;
5441 struct dwarf2_section_info
*abbrev_section
;
5442 /* Non-zero if CU currently points to a DWO file and we need to
5443 reread it. When this happens we need to reread the skeleton die
5444 before we can reread the DWO file (this only applies to CUs, not TUs). */
5445 int rereading_dwo_cu
= 0;
5447 if (dwarf_die_debug
)
5448 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5449 this_cu
->is_debug_types
? "type" : "comp",
5450 this_cu
->offset
.sect_off
);
5452 if (use_existing_cu
)
5455 /* If we're reading a TU directly from a DWO file, including a virtual DWO
5456 file (instead of going through the stub), short-circuit all of this. */
5457 if (this_cu
->reading_dwo_directly
)
5459 /* Narrow down the scope of possibilities to have to understand. */
5460 gdb_assert (this_cu
->is_debug_types
);
5461 gdb_assert (abbrev_table
== NULL
);
5462 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
, keep
,
5463 die_reader_func
, data
);
5467 cleanups
= make_cleanup (null_cleanup
, NULL
);
5469 /* This is cheap if the section is already read in. */
5470 dwarf2_read_section (objfile
, section
);
5472 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
5474 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
5476 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5479 /* If this CU is from a DWO file we need to start over, we need to
5480 refetch the attributes from the skeleton CU.
5481 This could be optimized by retrieving those attributes from when we
5482 were here the first time: the previous comp_unit_die was stored in
5483 comp_unit_obstack. But there's no data yet that we need this
5485 if (cu
->dwo_unit
!= NULL
)
5486 rereading_dwo_cu
= 1;
5490 /* If !use_existing_cu, this_cu->cu must be NULL. */
5491 gdb_assert (this_cu
->cu
== NULL
);
5492 cu
= XNEW (struct dwarf2_cu
);
5493 init_one_comp_unit (cu
, this_cu
);
5494 /* If an error occurs while loading, release our storage. */
5495 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5498 /* Get the header. */
5499 if (cu
->header
.first_die_offset
.cu_off
!= 0 && ! rereading_dwo_cu
)
5501 /* We already have the header, there's no need to read it in again. */
5502 info_ptr
+= cu
->header
.first_die_offset
.cu_off
;
5506 if (this_cu
->is_debug_types
)
5509 cu_offset type_offset_in_tu
;
5511 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
5512 abbrev_section
, info_ptr
,
5514 &type_offset_in_tu
);
5516 /* Since per_cu is the first member of struct signatured_type,
5517 we can go from a pointer to one to a pointer to the other. */
5518 sig_type
= (struct signatured_type
*) this_cu
;
5519 gdb_assert (sig_type
->signature
== signature
);
5520 gdb_assert (sig_type
->type_offset_in_tu
.cu_off
5521 == type_offset_in_tu
.cu_off
);
5522 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5524 /* LENGTH has not been set yet for type units if we're
5525 using .gdb_index. */
5526 this_cu
->length
= get_cu_length (&cu
->header
);
5528 /* Establish the type offset that can be used to lookup the type. */
5529 sig_type
->type_offset_in_section
.sect_off
=
5530 this_cu
->offset
.sect_off
+ sig_type
->type_offset_in_tu
.cu_off
;
5534 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5538 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5539 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
5543 /* Skip dummy compilation units. */
5544 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5545 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5547 do_cleanups (cleanups
);
5551 /* If we don't have them yet, read the abbrevs for this compilation unit.
5552 And if we need to read them now, make sure they're freed when we're
5553 done. Note that it's important that if the CU had an abbrev table
5554 on entry we don't free it when we're done: Somewhere up the call stack
5555 it may be in use. */
5556 if (abbrev_table
!= NULL
)
5558 gdb_assert (cu
->abbrev_table
== NULL
);
5559 gdb_assert (cu
->header
.abbrev_offset
.sect_off
5560 == abbrev_table
->offset
.sect_off
);
5561 cu
->abbrev_table
= abbrev_table
;
5563 else if (cu
->abbrev_table
== NULL
)
5565 dwarf2_read_abbrevs (cu
, abbrev_section
);
5566 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5568 else if (rereading_dwo_cu
)
5570 dwarf2_free_abbrev_table (cu
);
5571 dwarf2_read_abbrevs (cu
, abbrev_section
);
5574 /* Read the top level CU/TU die. */
5575 init_cu_die_reader (&reader
, cu
, section
, NULL
);
5576 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5578 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
5580 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
5581 DWO CU, that this test will fail (the attribute will not be present). */
5582 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5585 struct dwo_unit
*dwo_unit
;
5586 struct die_info
*dwo_comp_unit_die
;
5590 complaint (&symfile_complaints
,
5591 _("compilation unit with DW_AT_GNU_dwo_name"
5592 " has children (offset 0x%x) [in module %s]"),
5593 this_cu
->offset
.sect_off
, bfd_get_filename (abfd
));
5595 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
);
5596 if (dwo_unit
!= NULL
)
5598 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
5599 abbrev_table
!= NULL
,
5600 comp_unit_die
, NULL
,
5602 &dwo_comp_unit_die
, &has_children
) == 0)
5605 do_cleanups (cleanups
);
5608 comp_unit_die
= dwo_comp_unit_die
;
5612 /* Yikes, we couldn't find the rest of the DIE, we only have
5613 the stub. A complaint has already been logged. There's
5614 not much more we can do except pass on the stub DIE to
5615 die_reader_func. We don't want to throw an error on bad
5620 /* All of the above is setup for this call. Yikes. */
5621 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5623 /* Done, clean up. */
5624 if (free_cu_cleanup
!= NULL
)
5628 /* We've successfully allocated this compilation unit. Let our
5629 caller clean it up when finished with it. */
5630 discard_cleanups (free_cu_cleanup
);
5632 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5633 So we have to manually free the abbrev table. */
5634 dwarf2_free_abbrev_table (cu
);
5636 /* Link this CU into read_in_chain. */
5637 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5638 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5641 do_cleanups (free_cu_cleanup
);
5644 do_cleanups (cleanups
);
5647 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present.
5648 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed
5649 to have already done the lookup to find the DWO file).
5651 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
5652 THIS_CU->is_debug_types, but nothing else.
5654 We fill in THIS_CU->length.
5656 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5657 linker) then DIE_READER_FUNC will not get called.
5659 THIS_CU->cu is always freed when done.
5660 This is done in order to not leave THIS_CU->cu in a state where we have
5661 to care whether it refers to the "main" CU or the DWO CU. */
5664 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
5665 struct dwo_file
*dwo_file
,
5666 die_reader_func_ftype
*die_reader_func
,
5669 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5670 struct dwarf2_section_info
*section
= this_cu
->section
;
5671 bfd
*abfd
= get_section_bfd_owner (section
);
5672 struct dwarf2_section_info
*abbrev_section
;
5673 struct dwarf2_cu cu
;
5674 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5675 struct die_reader_specs reader
;
5676 struct cleanup
*cleanups
;
5677 struct die_info
*comp_unit_die
;
5680 if (dwarf_die_debug
)
5681 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5682 this_cu
->is_debug_types
? "type" : "comp",
5683 this_cu
->offset
.sect_off
);
5685 gdb_assert (this_cu
->cu
== NULL
);
5687 abbrev_section
= (dwo_file
!= NULL
5688 ? &dwo_file
->sections
.abbrev
5689 : get_abbrev_section_for_cu (this_cu
));
5691 /* This is cheap if the section is already read in. */
5692 dwarf2_read_section (objfile
, section
);
5694 init_one_comp_unit (&cu
, this_cu
);
5696 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
5698 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
5699 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, section
,
5700 abbrev_section
, info_ptr
,
5701 this_cu
->is_debug_types
);
5703 this_cu
->length
= get_cu_length (&cu
.header
);
5705 /* Skip dummy compilation units. */
5706 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5707 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5709 do_cleanups (cleanups
);
5713 dwarf2_read_abbrevs (&cu
, abbrev_section
);
5714 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
5716 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
);
5717 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5719 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5721 do_cleanups (cleanups
);
5724 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
5725 does not lookup the specified DWO file.
5726 This cannot be used to read DWO files.
5728 THIS_CU->cu is always freed when done.
5729 This is done in order to not leave THIS_CU->cu in a state where we have
5730 to care whether it refers to the "main" CU or the DWO CU.
5731 We can revisit this if the data shows there's a performance issue. */
5734 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
5735 die_reader_func_ftype
*die_reader_func
,
5738 init_cutu_and_read_dies_no_follow (this_cu
, NULL
, die_reader_func
, data
);
5741 /* Type Unit Groups.
5743 Type Unit Groups are a way to collapse the set of all TUs (type units) into
5744 a more manageable set. The grouping is done by DW_AT_stmt_list entry
5745 so that all types coming from the same compilation (.o file) are grouped
5746 together. A future step could be to put the types in the same symtab as
5747 the CU the types ultimately came from. */
5750 hash_type_unit_group (const void *item
)
5752 const struct type_unit_group
*tu_group
5753 = (const struct type_unit_group
*) item
;
5755 return hash_stmt_list_entry (&tu_group
->hash
);
5759 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
5761 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
5762 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
5764 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
5767 /* Allocate a hash table for type unit groups. */
5770 allocate_type_unit_groups_table (void)
5772 return htab_create_alloc_ex (3,
5773 hash_type_unit_group
,
5776 &dwarf2_per_objfile
->objfile
->objfile_obstack
,
5777 hashtab_obstack_allocate
,
5778 dummy_obstack_deallocate
);
5781 /* Type units that don't have DW_AT_stmt_list are grouped into their own
5782 partial symtabs. We combine several TUs per psymtab to not let the size
5783 of any one psymtab grow too big. */
5784 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
5785 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
5787 /* Helper routine for get_type_unit_group.
5788 Create the type_unit_group object used to hold one or more TUs. */
5790 static struct type_unit_group
*
5791 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
5793 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5794 struct dwarf2_per_cu_data
*per_cu
;
5795 struct type_unit_group
*tu_group
;
5797 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5798 struct type_unit_group
);
5799 per_cu
= &tu_group
->per_cu
;
5800 per_cu
->objfile
= objfile
;
5802 if (dwarf2_per_objfile
->using_index
)
5804 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5805 struct dwarf2_per_cu_quick_data
);
5809 unsigned int line_offset
= line_offset_struct
.sect_off
;
5810 struct partial_symtab
*pst
;
5813 /* Give the symtab a useful name for debug purposes. */
5814 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
5815 name
= xstrprintf ("<type_units_%d>",
5816 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
5818 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
5820 pst
= create_partial_symtab (per_cu
, name
);
5826 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
5827 tu_group
->hash
.line_offset
= line_offset_struct
;
5832 /* Look up the type_unit_group for type unit CU, and create it if necessary.
5833 STMT_LIST is a DW_AT_stmt_list attribute. */
5835 static struct type_unit_group
*
5836 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
5838 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
5839 struct type_unit_group
*tu_group
;
5841 unsigned int line_offset
;
5842 struct type_unit_group type_unit_group_for_lookup
;
5844 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
5846 dwarf2_per_objfile
->type_unit_groups
=
5847 allocate_type_unit_groups_table ();
5850 /* Do we need to create a new group, or can we use an existing one? */
5854 line_offset
= DW_UNSND (stmt_list
);
5855 ++tu_stats
->nr_symtab_sharers
;
5859 /* Ugh, no stmt_list. Rare, but we have to handle it.
5860 We can do various things here like create one group per TU or
5861 spread them over multiple groups to split up the expansion work.
5862 To avoid worst case scenarios (too many groups or too large groups)
5863 we, umm, group them in bunches. */
5864 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
5865 | (tu_stats
->nr_stmt_less_type_units
5866 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
5867 ++tu_stats
->nr_stmt_less_type_units
;
5870 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
5871 type_unit_group_for_lookup
.hash
.line_offset
.sect_off
= line_offset
;
5872 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
5873 &type_unit_group_for_lookup
, INSERT
);
5876 tu_group
= (struct type_unit_group
*) *slot
;
5877 gdb_assert (tu_group
!= NULL
);
5881 sect_offset line_offset_struct
;
5883 line_offset_struct
.sect_off
= line_offset
;
5884 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
5886 ++tu_stats
->nr_symtabs
;
5892 /* Partial symbol tables. */
5894 /* Create a psymtab named NAME and assign it to PER_CU.
5896 The caller must fill in the following details:
5897 dirname, textlow, texthigh. */
5899 static struct partial_symtab
*
5900 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
5902 struct objfile
*objfile
= per_cu
->objfile
;
5903 struct partial_symtab
*pst
;
5905 pst
= start_psymtab_common (objfile
, name
, 0,
5906 objfile
->global_psymbols
.next
,
5907 objfile
->static_psymbols
.next
);
5909 pst
->psymtabs_addrmap_supported
= 1;
5911 /* This is the glue that links PST into GDB's symbol API. */
5912 pst
->read_symtab_private
= per_cu
;
5913 pst
->read_symtab
= dwarf2_read_symtab
;
5914 per_cu
->v
.psymtab
= pst
;
5919 /* The DATA object passed to process_psymtab_comp_unit_reader has this
5922 struct process_psymtab_comp_unit_data
5924 /* True if we are reading a DW_TAG_partial_unit. */
5926 int want_partial_unit
;
5928 /* The "pretend" language that is used if the CU doesn't declare a
5931 enum language pretend_language
;
5934 /* die_reader_func for process_psymtab_comp_unit. */
5937 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
5938 const gdb_byte
*info_ptr
,
5939 struct die_info
*comp_unit_die
,
5943 struct dwarf2_cu
*cu
= reader
->cu
;
5944 struct objfile
*objfile
= cu
->objfile
;
5945 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
5946 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
5948 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
5949 struct partial_symtab
*pst
;
5951 const char *filename
;
5952 struct process_psymtab_comp_unit_data
*info
5953 = (struct process_psymtab_comp_unit_data
*) data
;
5955 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !info
->want_partial_unit
)
5958 gdb_assert (! per_cu
->is_debug_types
);
5960 prepare_one_comp_unit (cu
, comp_unit_die
, info
->pretend_language
);
5962 cu
->list_in_scope
= &file_symbols
;
5964 /* Allocate a new partial symbol table structure. */
5965 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
5966 if (filename
== NULL
)
5969 pst
= create_partial_symtab (per_cu
, filename
);
5971 /* This must be done before calling dwarf2_build_include_psymtabs. */
5972 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
5974 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5976 dwarf2_find_base_address (comp_unit_die
, cu
);
5978 /* Possibly set the default values of LOWPC and HIGHPC from
5980 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
5981 &best_highpc
, cu
, pst
);
5982 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
5983 /* Store the contiguous range if it is not empty; it can be empty for
5984 CUs with no code. */
5985 addrmap_set_empty (objfile
->psymtabs_addrmap
,
5986 gdbarch_adjust_dwarf2_addr (gdbarch
,
5987 best_lowpc
+ baseaddr
),
5988 gdbarch_adjust_dwarf2_addr (gdbarch
,
5989 best_highpc
+ baseaddr
) - 1,
5992 /* Check if comp unit has_children.
5993 If so, read the rest of the partial symbols from this comp unit.
5994 If not, there's no more debug_info for this comp unit. */
5997 struct partial_die_info
*first_die
;
5998 CORE_ADDR lowpc
, highpc
;
6000 lowpc
= ((CORE_ADDR
) -1);
6001 highpc
= ((CORE_ADDR
) 0);
6003 first_die
= load_partial_dies (reader
, info_ptr
, 1);
6005 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
6008 /* If we didn't find a lowpc, set it to highpc to avoid
6009 complaints from `maint check'. */
6010 if (lowpc
== ((CORE_ADDR
) -1))
6013 /* If the compilation unit didn't have an explicit address range,
6014 then use the information extracted from its child dies. */
6018 best_highpc
= highpc
;
6021 pst
->textlow
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
);
6022 pst
->texthigh
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
);
6024 end_psymtab_common (objfile
, pst
);
6026 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
6029 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
6030 struct dwarf2_per_cu_data
*iter
;
6032 /* Fill in 'dependencies' here; we fill in 'users' in a
6034 pst
->number_of_dependencies
= len
;
6036 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
6038 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
6041 pst
->dependencies
[i
] = iter
->v
.psymtab
;
6043 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
6046 /* Get the list of files included in the current compilation unit,
6047 and build a psymtab for each of them. */
6048 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
6050 if (dwarf_read_debug
)
6052 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6054 fprintf_unfiltered (gdb_stdlog
,
6055 "Psymtab for %s unit @0x%x: %s - %s"
6056 ", %d global, %d static syms\n",
6057 per_cu
->is_debug_types
? "type" : "comp",
6058 per_cu
->offset
.sect_off
,
6059 paddress (gdbarch
, pst
->textlow
),
6060 paddress (gdbarch
, pst
->texthigh
),
6061 pst
->n_global_syms
, pst
->n_static_syms
);
6065 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6066 Process compilation unit THIS_CU for a psymtab. */
6069 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
6070 int want_partial_unit
,
6071 enum language pretend_language
)
6073 struct process_psymtab_comp_unit_data info
;
6075 /* If this compilation unit was already read in, free the
6076 cached copy in order to read it in again. This is
6077 necessary because we skipped some symbols when we first
6078 read in the compilation unit (see load_partial_dies).
6079 This problem could be avoided, but the benefit is unclear. */
6080 if (this_cu
->cu
!= NULL
)
6081 free_one_cached_comp_unit (this_cu
);
6083 gdb_assert (! this_cu
->is_debug_types
);
6084 info
.want_partial_unit
= want_partial_unit
;
6085 info
.pretend_language
= pretend_language
;
6086 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0,
6087 process_psymtab_comp_unit_reader
,
6090 /* Age out any secondary CUs. */
6091 age_cached_comp_units ();
6094 /* Reader function for build_type_psymtabs. */
6097 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
6098 const gdb_byte
*info_ptr
,
6099 struct die_info
*type_unit_die
,
6103 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6104 struct dwarf2_cu
*cu
= reader
->cu
;
6105 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
6106 struct signatured_type
*sig_type
;
6107 struct type_unit_group
*tu_group
;
6108 struct attribute
*attr
;
6109 struct partial_die_info
*first_die
;
6110 CORE_ADDR lowpc
, highpc
;
6111 struct partial_symtab
*pst
;
6113 gdb_assert (data
== NULL
);
6114 gdb_assert (per_cu
->is_debug_types
);
6115 sig_type
= (struct signatured_type
*) per_cu
;
6120 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
6121 tu_group
= get_type_unit_group (cu
, attr
);
6123 VEC_safe_push (sig_type_ptr
, tu_group
->tus
, sig_type
);
6125 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
6126 cu
->list_in_scope
= &file_symbols
;
6127 pst
= create_partial_symtab (per_cu
, "");
6130 first_die
= load_partial_dies (reader
, info_ptr
, 1);
6132 lowpc
= (CORE_ADDR
) -1;
6133 highpc
= (CORE_ADDR
) 0;
6134 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
6136 end_psymtab_common (objfile
, pst
);
6139 /* Struct used to sort TUs by their abbreviation table offset. */
6141 struct tu_abbrev_offset
6143 struct signatured_type
*sig_type
;
6144 sect_offset abbrev_offset
;
6147 /* Helper routine for build_type_psymtabs_1, passed to qsort. */
6150 sort_tu_by_abbrev_offset (const void *ap
, const void *bp
)
6152 const struct tu_abbrev_offset
* const *a
6153 = (const struct tu_abbrev_offset
* const*) ap
;
6154 const struct tu_abbrev_offset
* const *b
6155 = (const struct tu_abbrev_offset
* const*) bp
;
6156 unsigned int aoff
= (*a
)->abbrev_offset
.sect_off
;
6157 unsigned int boff
= (*b
)->abbrev_offset
.sect_off
;
6159 return (aoff
> boff
) - (aoff
< boff
);
6162 /* Efficiently read all the type units.
6163 This does the bulk of the work for build_type_psymtabs.
6165 The efficiency is because we sort TUs by the abbrev table they use and
6166 only read each abbrev table once. In one program there are 200K TUs
6167 sharing 8K abbrev tables.
6169 The main purpose of this function is to support building the
6170 dwarf2_per_objfile->type_unit_groups table.
6171 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
6172 can collapse the search space by grouping them by stmt_list.
6173 The savings can be significant, in the same program from above the 200K TUs
6174 share 8K stmt_list tables.
6176 FUNC is expected to call get_type_unit_group, which will create the
6177 struct type_unit_group if necessary and add it to
6178 dwarf2_per_objfile->type_unit_groups. */
6181 build_type_psymtabs_1 (void)
6183 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6184 struct cleanup
*cleanups
;
6185 struct abbrev_table
*abbrev_table
;
6186 sect_offset abbrev_offset
;
6187 struct tu_abbrev_offset
*sorted_by_abbrev
;
6190 /* It's up to the caller to not call us multiple times. */
6191 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
6193 if (dwarf2_per_objfile
->n_type_units
== 0)
6196 /* TUs typically share abbrev tables, and there can be way more TUs than
6197 abbrev tables. Sort by abbrev table to reduce the number of times we
6198 read each abbrev table in.
6199 Alternatives are to punt or to maintain a cache of abbrev tables.
6200 This is simpler and efficient enough for now.
6202 Later we group TUs by their DW_AT_stmt_list value (as this defines the
6203 symtab to use). Typically TUs with the same abbrev offset have the same
6204 stmt_list value too so in practice this should work well.
6206 The basic algorithm here is:
6208 sort TUs by abbrev table
6209 for each TU with same abbrev table:
6210 read abbrev table if first user
6211 read TU top level DIE
6212 [IWBN if DWO skeletons had DW_AT_stmt_list]
6215 if (dwarf_read_debug
)
6216 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
6218 /* Sort in a separate table to maintain the order of all_type_units
6219 for .gdb_index: TU indices directly index all_type_units. */
6220 sorted_by_abbrev
= XNEWVEC (struct tu_abbrev_offset
,
6221 dwarf2_per_objfile
->n_type_units
);
6222 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6224 struct signatured_type
*sig_type
= dwarf2_per_objfile
->all_type_units
[i
];
6226 sorted_by_abbrev
[i
].sig_type
= sig_type
;
6227 sorted_by_abbrev
[i
].abbrev_offset
=
6228 read_abbrev_offset (sig_type
->per_cu
.section
,
6229 sig_type
->per_cu
.offset
);
6231 cleanups
= make_cleanup (xfree
, sorted_by_abbrev
);
6232 qsort (sorted_by_abbrev
, dwarf2_per_objfile
->n_type_units
,
6233 sizeof (struct tu_abbrev_offset
), sort_tu_by_abbrev_offset
);
6235 abbrev_offset
.sect_off
= ~(unsigned) 0;
6236 abbrev_table
= NULL
;
6237 make_cleanup (abbrev_table_free_cleanup
, &abbrev_table
);
6239 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6241 const struct tu_abbrev_offset
*tu
= &sorted_by_abbrev
[i
];
6243 /* Switch to the next abbrev table if necessary. */
6244 if (abbrev_table
== NULL
6245 || tu
->abbrev_offset
.sect_off
!= abbrev_offset
.sect_off
)
6247 if (abbrev_table
!= NULL
)
6249 abbrev_table_free (abbrev_table
);
6250 /* Reset to NULL in case abbrev_table_read_table throws
6251 an error: abbrev_table_free_cleanup will get called. */
6252 abbrev_table
= NULL
;
6254 abbrev_offset
= tu
->abbrev_offset
;
6256 abbrev_table_read_table (&dwarf2_per_objfile
->abbrev
,
6258 ++tu_stats
->nr_uniq_abbrev_tables
;
6261 init_cutu_and_read_dies (&tu
->sig_type
->per_cu
, abbrev_table
, 0, 0,
6262 build_type_psymtabs_reader
, NULL
);
6265 do_cleanups (cleanups
);
6268 /* Print collected type unit statistics. */
6271 print_tu_stats (void)
6273 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6275 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
6276 fprintf_unfiltered (gdb_stdlog
, " %d TUs\n",
6277 dwarf2_per_objfile
->n_type_units
);
6278 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
6279 tu_stats
->nr_uniq_abbrev_tables
);
6280 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
6281 tu_stats
->nr_symtabs
);
6282 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
6283 tu_stats
->nr_symtab_sharers
);
6284 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
6285 tu_stats
->nr_stmt_less_type_units
);
6286 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
6287 tu_stats
->nr_all_type_units_reallocs
);
6290 /* Traversal function for build_type_psymtabs. */
6293 build_type_psymtab_dependencies (void **slot
, void *info
)
6295 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6296 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
6297 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
6298 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6299 int len
= VEC_length (sig_type_ptr
, tu_group
->tus
);
6300 struct signatured_type
*iter
;
6303 gdb_assert (len
> 0);
6304 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
6306 pst
->number_of_dependencies
= len
;
6308 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
6310 VEC_iterate (sig_type_ptr
, tu_group
->tus
, i
, iter
);
6313 gdb_assert (iter
->per_cu
.is_debug_types
);
6314 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
6315 iter
->type_unit_group
= tu_group
;
6318 VEC_free (sig_type_ptr
, tu_group
->tus
);
6323 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6324 Build partial symbol tables for the .debug_types comp-units. */
6327 build_type_psymtabs (struct objfile
*objfile
)
6329 if (! create_all_type_units (objfile
))
6332 build_type_psymtabs_1 ();
6335 /* Traversal function for process_skeletonless_type_unit.
6336 Read a TU in a DWO file and build partial symbols for it. */
6339 process_skeletonless_type_unit (void **slot
, void *info
)
6341 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
6342 struct objfile
*objfile
= (struct objfile
*) info
;
6343 struct signatured_type find_entry
, *entry
;
6345 /* If this TU doesn't exist in the global table, add it and read it in. */
6347 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6349 dwarf2_per_objfile
->signatured_types
6350 = allocate_signatured_type_table (objfile
);
6353 find_entry
.signature
= dwo_unit
->signature
;
6354 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
, &find_entry
,
6356 /* If we've already seen this type there's nothing to do. What's happening
6357 is we're doing our own version of comdat-folding here. */
6361 /* This does the job that create_all_type_units would have done for
6363 entry
= add_type_unit (dwo_unit
->signature
, slot
);
6364 fill_in_sig_entry_from_dwo_entry (objfile
, entry
, dwo_unit
);
6367 /* This does the job that build_type_psymtabs_1 would have done. */
6368 init_cutu_and_read_dies (&entry
->per_cu
, NULL
, 0, 0,
6369 build_type_psymtabs_reader
, NULL
);
6374 /* Traversal function for process_skeletonless_type_units. */
6377 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
6379 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
6381 if (dwo_file
->tus
!= NULL
)
6383 htab_traverse_noresize (dwo_file
->tus
,
6384 process_skeletonless_type_unit
, info
);
6390 /* Scan all TUs of DWO files, verifying we've processed them.
6391 This is needed in case a TU was emitted without its skeleton.
6392 Note: This can't be done until we know what all the DWO files are. */
6395 process_skeletonless_type_units (struct objfile
*objfile
)
6397 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
6398 if (get_dwp_file () == NULL
6399 && dwarf2_per_objfile
->dwo_files
!= NULL
)
6401 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
,
6402 process_dwo_file_for_skeletonless_type_units
,
6407 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
6410 psymtabs_addrmap_cleanup (void *o
)
6412 struct objfile
*objfile
= (struct objfile
*) o
;
6414 objfile
->psymtabs_addrmap
= NULL
;
6417 /* Compute the 'user' field for each psymtab in OBJFILE. */
6420 set_partial_user (struct objfile
*objfile
)
6424 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6426 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6427 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6433 for (j
= 0; j
< pst
->number_of_dependencies
; ++j
)
6435 /* Set the 'user' field only if it is not already set. */
6436 if (pst
->dependencies
[j
]->user
== NULL
)
6437 pst
->dependencies
[j
]->user
= pst
;
6442 /* Build the partial symbol table by doing a quick pass through the
6443 .debug_info and .debug_abbrev sections. */
6446 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
6448 struct cleanup
*back_to
, *addrmap_cleanup
;
6449 struct obstack temp_obstack
;
6452 if (dwarf_read_debug
)
6454 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
6455 objfile_name (objfile
));
6458 dwarf2_per_objfile
->reading_partial_symbols
= 1;
6460 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
6462 /* Any cached compilation units will be linked by the per-objfile
6463 read_in_chain. Make sure to free them when we're done. */
6464 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
6466 build_type_psymtabs (objfile
);
6468 create_all_comp_units (objfile
);
6470 /* Create a temporary address map on a temporary obstack. We later
6471 copy this to the final obstack. */
6472 obstack_init (&temp_obstack
);
6473 make_cleanup_obstack_free (&temp_obstack
);
6474 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
6475 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
6477 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6479 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6481 process_psymtab_comp_unit (per_cu
, 0, language_minimal
);
6484 /* This has to wait until we read the CUs, we need the list of DWOs. */
6485 process_skeletonless_type_units (objfile
);
6487 /* Now that all TUs have been processed we can fill in the dependencies. */
6488 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
6490 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
6491 build_type_psymtab_dependencies
, NULL
);
6494 if (dwarf_read_debug
)
6497 set_partial_user (objfile
);
6499 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
6500 &objfile
->objfile_obstack
);
6501 discard_cleanups (addrmap_cleanup
);
6503 do_cleanups (back_to
);
6505 if (dwarf_read_debug
)
6506 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
6507 objfile_name (objfile
));
6510 /* die_reader_func for load_partial_comp_unit. */
6513 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
6514 const gdb_byte
*info_ptr
,
6515 struct die_info
*comp_unit_die
,
6519 struct dwarf2_cu
*cu
= reader
->cu
;
6521 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
6523 /* Check if comp unit has_children.
6524 If so, read the rest of the partial symbols from this comp unit.
6525 If not, there's no more debug_info for this comp unit. */
6527 load_partial_dies (reader
, info_ptr
, 0);
6530 /* Load the partial DIEs for a secondary CU into memory.
6531 This is also used when rereading a primary CU with load_all_dies. */
6534 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
6536 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
6537 load_partial_comp_unit_reader
, NULL
);
6541 read_comp_units_from_section (struct objfile
*objfile
,
6542 struct dwarf2_section_info
*section
,
6543 unsigned int is_dwz
,
6546 struct dwarf2_per_cu_data
***all_comp_units
)
6548 const gdb_byte
*info_ptr
;
6549 bfd
*abfd
= get_section_bfd_owner (section
);
6551 if (dwarf_read_debug
)
6552 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
6553 get_section_name (section
),
6554 get_section_file_name (section
));
6556 dwarf2_read_section (objfile
, section
);
6558 info_ptr
= section
->buffer
;
6560 while (info_ptr
< section
->buffer
+ section
->size
)
6562 unsigned int length
, initial_length_size
;
6563 struct dwarf2_per_cu_data
*this_cu
;
6566 offset
.sect_off
= info_ptr
- section
->buffer
;
6568 /* Read just enough information to find out where the next
6569 compilation unit is. */
6570 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6572 /* Save the compilation unit for later lookup. */
6573 this_cu
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_per_cu_data
);
6574 memset (this_cu
, 0, sizeof (*this_cu
));
6575 this_cu
->offset
= offset
;
6576 this_cu
->length
= length
+ initial_length_size
;
6577 this_cu
->is_dwz
= is_dwz
;
6578 this_cu
->objfile
= objfile
;
6579 this_cu
->section
= section
;
6581 if (*n_comp_units
== *n_allocated
)
6584 *all_comp_units
= XRESIZEVEC (struct dwarf2_per_cu_data
*,
6585 *all_comp_units
, *n_allocated
);
6587 (*all_comp_units
)[*n_comp_units
] = this_cu
;
6590 info_ptr
= info_ptr
+ this_cu
->length
;
6594 /* Create a list of all compilation units in OBJFILE.
6595 This is only done for -readnow and building partial symtabs. */
6598 create_all_comp_units (struct objfile
*objfile
)
6602 struct dwarf2_per_cu_data
**all_comp_units
;
6603 struct dwz_file
*dwz
;
6607 all_comp_units
= XNEWVEC (struct dwarf2_per_cu_data
*, n_allocated
);
6609 read_comp_units_from_section (objfile
, &dwarf2_per_objfile
->info
, 0,
6610 &n_allocated
, &n_comp_units
, &all_comp_units
);
6612 dwz
= dwarf2_get_dwz_file ();
6614 read_comp_units_from_section (objfile
, &dwz
->info
, 1,
6615 &n_allocated
, &n_comp_units
,
6618 dwarf2_per_objfile
->all_comp_units
= XOBNEWVEC (&objfile
->objfile_obstack
,
6619 struct dwarf2_per_cu_data
*,
6621 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
6622 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
6623 xfree (all_comp_units
);
6624 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
6627 /* Process all loaded DIEs for compilation unit CU, starting at
6628 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
6629 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
6630 DW_AT_ranges). See the comments of add_partial_subprogram on how
6631 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
6634 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
6635 CORE_ADDR
*highpc
, int set_addrmap
,
6636 struct dwarf2_cu
*cu
)
6638 struct partial_die_info
*pdi
;
6640 /* Now, march along the PDI's, descending into ones which have
6641 interesting children but skipping the children of the other ones,
6642 until we reach the end of the compilation unit. */
6648 fixup_partial_die (pdi
, cu
);
6650 /* Anonymous namespaces or modules have no name but have interesting
6651 children, so we need to look at them. Ditto for anonymous
6654 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
6655 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
6656 || pdi
->tag
== DW_TAG_imported_unit
)
6660 case DW_TAG_subprogram
:
6661 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6663 case DW_TAG_constant
:
6664 case DW_TAG_variable
:
6665 case DW_TAG_typedef
:
6666 case DW_TAG_union_type
:
6667 if (!pdi
->is_declaration
)
6669 add_partial_symbol (pdi
, cu
);
6672 case DW_TAG_class_type
:
6673 case DW_TAG_interface_type
:
6674 case DW_TAG_structure_type
:
6675 if (!pdi
->is_declaration
)
6677 add_partial_symbol (pdi
, cu
);
6680 case DW_TAG_enumeration_type
:
6681 if (!pdi
->is_declaration
)
6682 add_partial_enumeration (pdi
, cu
);
6684 case DW_TAG_base_type
:
6685 case DW_TAG_subrange_type
:
6686 /* File scope base type definitions are added to the partial
6688 add_partial_symbol (pdi
, cu
);
6690 case DW_TAG_namespace
:
6691 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6694 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6696 case DW_TAG_imported_unit
:
6698 struct dwarf2_per_cu_data
*per_cu
;
6700 /* For now we don't handle imported units in type units. */
6701 if (cu
->per_cu
->is_debug_types
)
6703 error (_("Dwarf Error: DW_TAG_imported_unit is not"
6704 " supported in type units [in module %s]"),
6705 objfile_name (cu
->objfile
));
6708 per_cu
= dwarf2_find_containing_comp_unit (pdi
->d
.offset
,
6712 /* Go read the partial unit, if needed. */
6713 if (per_cu
->v
.psymtab
== NULL
)
6714 process_psymtab_comp_unit (per_cu
, 1, cu
->language
);
6716 VEC_safe_push (dwarf2_per_cu_ptr
,
6717 cu
->per_cu
->imported_symtabs
, per_cu
);
6720 case DW_TAG_imported_declaration
:
6721 add_partial_symbol (pdi
, cu
);
6728 /* If the die has a sibling, skip to the sibling. */
6730 pdi
= pdi
->die_sibling
;
6734 /* Functions used to compute the fully scoped name of a partial DIE.
6736 Normally, this is simple. For C++, the parent DIE's fully scoped
6737 name is concatenated with "::" and the partial DIE's name. For
6738 Java, the same thing occurs except that "." is used instead of "::".
6739 Enumerators are an exception; they use the scope of their parent
6740 enumeration type, i.e. the name of the enumeration type is not
6741 prepended to the enumerator.
6743 There are two complexities. One is DW_AT_specification; in this
6744 case "parent" means the parent of the target of the specification,
6745 instead of the direct parent of the DIE. The other is compilers
6746 which do not emit DW_TAG_namespace; in this case we try to guess
6747 the fully qualified name of structure types from their members'
6748 linkage names. This must be done using the DIE's children rather
6749 than the children of any DW_AT_specification target. We only need
6750 to do this for structures at the top level, i.e. if the target of
6751 any DW_AT_specification (if any; otherwise the DIE itself) does not
6754 /* Compute the scope prefix associated with PDI's parent, in
6755 compilation unit CU. The result will be allocated on CU's
6756 comp_unit_obstack, or a copy of the already allocated PDI->NAME
6757 field. NULL is returned if no prefix is necessary. */
6759 partial_die_parent_scope (struct partial_die_info
*pdi
,
6760 struct dwarf2_cu
*cu
)
6762 const char *grandparent_scope
;
6763 struct partial_die_info
*parent
, *real_pdi
;
6765 /* We need to look at our parent DIE; if we have a DW_AT_specification,
6766 then this means the parent of the specification DIE. */
6769 while (real_pdi
->has_specification
)
6770 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
6771 real_pdi
->spec_is_dwz
, cu
);
6773 parent
= real_pdi
->die_parent
;
6777 if (parent
->scope_set
)
6778 return parent
->scope
;
6780 fixup_partial_die (parent
, cu
);
6782 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
6784 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
6785 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
6786 Work around this problem here. */
6787 if (cu
->language
== language_cplus
6788 && parent
->tag
== DW_TAG_namespace
6789 && strcmp (parent
->name
, "::") == 0
6790 && grandparent_scope
== NULL
)
6792 parent
->scope
= NULL
;
6793 parent
->scope_set
= 1;
6797 if (pdi
->tag
== DW_TAG_enumerator
)
6798 /* Enumerators should not get the name of the enumeration as a prefix. */
6799 parent
->scope
= grandparent_scope
;
6800 else if (parent
->tag
== DW_TAG_namespace
6801 || parent
->tag
== DW_TAG_module
6802 || parent
->tag
== DW_TAG_structure_type
6803 || parent
->tag
== DW_TAG_class_type
6804 || parent
->tag
== DW_TAG_interface_type
6805 || parent
->tag
== DW_TAG_union_type
6806 || parent
->tag
== DW_TAG_enumeration_type
)
6808 if (grandparent_scope
== NULL
)
6809 parent
->scope
= parent
->name
;
6811 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
6813 parent
->name
, 0, cu
);
6817 /* FIXME drow/2004-04-01: What should we be doing with
6818 function-local names? For partial symbols, we should probably be
6820 complaint (&symfile_complaints
,
6821 _("unhandled containing DIE tag %d for DIE at %d"),
6822 parent
->tag
, pdi
->offset
.sect_off
);
6823 parent
->scope
= grandparent_scope
;
6826 parent
->scope_set
= 1;
6827 return parent
->scope
;
6830 /* Return the fully scoped name associated with PDI, from compilation unit
6831 CU. The result will be allocated with malloc. */
6834 partial_die_full_name (struct partial_die_info
*pdi
,
6835 struct dwarf2_cu
*cu
)
6837 const char *parent_scope
;
6839 /* If this is a template instantiation, we can not work out the
6840 template arguments from partial DIEs. So, unfortunately, we have
6841 to go through the full DIEs. At least any work we do building
6842 types here will be reused if full symbols are loaded later. */
6843 if (pdi
->has_template_arguments
)
6845 fixup_partial_die (pdi
, cu
);
6847 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
6849 struct die_info
*die
;
6850 struct attribute attr
;
6851 struct dwarf2_cu
*ref_cu
= cu
;
6853 /* DW_FORM_ref_addr is using section offset. */
6854 attr
.name
= (enum dwarf_attribute
) 0;
6855 attr
.form
= DW_FORM_ref_addr
;
6856 attr
.u
.unsnd
= pdi
->offset
.sect_off
;
6857 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
6859 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
6863 parent_scope
= partial_die_parent_scope (pdi
, cu
);
6864 if (parent_scope
== NULL
)
6867 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
6871 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
6873 struct objfile
*objfile
= cu
->objfile
;
6874 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6876 const char *actual_name
= NULL
;
6878 char *built_actual_name
;
6880 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6882 built_actual_name
= partial_die_full_name (pdi
, cu
);
6883 if (built_actual_name
!= NULL
)
6884 actual_name
= built_actual_name
;
6886 if (actual_name
== NULL
)
6887 actual_name
= pdi
->name
;
6891 case DW_TAG_subprogram
:
6892 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
);
6893 if (pdi
->is_external
|| cu
->language
== language_ada
)
6895 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
6896 of the global scope. But in Ada, we want to be able to access
6897 nested procedures globally. So all Ada subprograms are stored
6898 in the global scope. */
6899 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6900 built_actual_name
!= NULL
,
6901 VAR_DOMAIN
, LOC_BLOCK
,
6902 &objfile
->global_psymbols
,
6903 addr
, cu
->language
, objfile
);
6907 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6908 built_actual_name
!= NULL
,
6909 VAR_DOMAIN
, LOC_BLOCK
,
6910 &objfile
->static_psymbols
,
6911 addr
, cu
->language
, objfile
);
6914 case DW_TAG_constant
:
6916 struct psymbol_allocation_list
*list
;
6918 if (pdi
->is_external
)
6919 list
= &objfile
->global_psymbols
;
6921 list
= &objfile
->static_psymbols
;
6922 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6923 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
6924 list
, 0, cu
->language
, objfile
);
6927 case DW_TAG_variable
:
6929 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
6933 && !dwarf2_per_objfile
->has_section_at_zero
)
6935 /* A global or static variable may also have been stripped
6936 out by the linker if unused, in which case its address
6937 will be nullified; do not add such variables into partial
6938 symbol table then. */
6940 else if (pdi
->is_external
)
6943 Don't enter into the minimal symbol tables as there is
6944 a minimal symbol table entry from the ELF symbols already.
6945 Enter into partial symbol table if it has a location
6946 descriptor or a type.
6947 If the location descriptor is missing, new_symbol will create
6948 a LOC_UNRESOLVED symbol, the address of the variable will then
6949 be determined from the minimal symbol table whenever the variable
6951 The address for the partial symbol table entry is not
6952 used by GDB, but it comes in handy for debugging partial symbol
6955 if (pdi
->d
.locdesc
|| pdi
->has_type
)
6956 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6957 built_actual_name
!= NULL
,
6958 VAR_DOMAIN
, LOC_STATIC
,
6959 &objfile
->global_psymbols
,
6961 cu
->language
, objfile
);
6965 int has_loc
= pdi
->d
.locdesc
!= NULL
;
6967 /* Static Variable. Skip symbols whose value we cannot know (those
6968 without location descriptors or constant values). */
6969 if (!has_loc
&& !pdi
->has_const_value
)
6971 xfree (built_actual_name
);
6975 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6976 built_actual_name
!= NULL
,
6977 VAR_DOMAIN
, LOC_STATIC
,
6978 &objfile
->static_psymbols
,
6979 has_loc
? addr
+ baseaddr
: (CORE_ADDR
) 0,
6980 cu
->language
, objfile
);
6983 case DW_TAG_typedef
:
6984 case DW_TAG_base_type
:
6985 case DW_TAG_subrange_type
:
6986 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6987 built_actual_name
!= NULL
,
6988 VAR_DOMAIN
, LOC_TYPEDEF
,
6989 &objfile
->static_psymbols
,
6990 0, cu
->language
, objfile
);
6992 case DW_TAG_imported_declaration
:
6993 case DW_TAG_namespace
:
6994 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6995 built_actual_name
!= NULL
,
6996 VAR_DOMAIN
, LOC_TYPEDEF
,
6997 &objfile
->global_psymbols
,
6998 0, cu
->language
, objfile
);
7001 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7002 built_actual_name
!= NULL
,
7003 MODULE_DOMAIN
, LOC_TYPEDEF
,
7004 &objfile
->global_psymbols
,
7005 0, cu
->language
, objfile
);
7007 case DW_TAG_class_type
:
7008 case DW_TAG_interface_type
:
7009 case DW_TAG_structure_type
:
7010 case DW_TAG_union_type
:
7011 case DW_TAG_enumeration_type
:
7012 /* Skip external references. The DWARF standard says in the section
7013 about "Structure, Union, and Class Type Entries": "An incomplete
7014 structure, union or class type is represented by a structure,
7015 union or class entry that does not have a byte size attribute
7016 and that has a DW_AT_declaration attribute." */
7017 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
7019 xfree (built_actual_name
);
7023 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
7024 static vs. global. */
7025 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7026 built_actual_name
!= NULL
,
7027 STRUCT_DOMAIN
, LOC_TYPEDEF
,
7028 (cu
->language
== language_cplus
7029 || cu
->language
== language_java
)
7030 ? &objfile
->global_psymbols
7031 : &objfile
->static_psymbols
,
7032 0, cu
->language
, objfile
);
7035 case DW_TAG_enumerator
:
7036 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7037 built_actual_name
!= NULL
,
7038 VAR_DOMAIN
, LOC_CONST
,
7039 (cu
->language
== language_cplus
7040 || cu
->language
== language_java
)
7041 ? &objfile
->global_psymbols
7042 : &objfile
->static_psymbols
,
7043 0, cu
->language
, objfile
);
7049 xfree (built_actual_name
);
7052 /* Read a partial die corresponding to a namespace; also, add a symbol
7053 corresponding to that namespace to the symbol table. NAMESPACE is
7054 the name of the enclosing namespace. */
7057 add_partial_namespace (struct partial_die_info
*pdi
,
7058 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7059 int set_addrmap
, struct dwarf2_cu
*cu
)
7061 /* Add a symbol for the namespace. */
7063 add_partial_symbol (pdi
, cu
);
7065 /* Now scan partial symbols in that namespace. */
7067 if (pdi
->has_children
)
7068 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7071 /* Read a partial die corresponding to a Fortran module. */
7074 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
7075 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
7077 /* Add a symbol for the namespace. */
7079 add_partial_symbol (pdi
, cu
);
7081 /* Now scan partial symbols in that module. */
7083 if (pdi
->has_children
)
7084 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7087 /* Read a partial die corresponding to a subprogram and create a partial
7088 symbol for that subprogram. When the CU language allows it, this
7089 routine also defines a partial symbol for each nested subprogram
7090 that this subprogram contains. If SET_ADDRMAP is true, record the
7091 covered ranges in the addrmap. Set *LOWPC and *HIGHPC to the lowest
7092 and highest PC values found in PDI.
7094 PDI may also be a lexical block, in which case we simply search
7095 recursively for subprograms defined inside that lexical block.
7096 Again, this is only performed when the CU language allows this
7097 type of definitions. */
7100 add_partial_subprogram (struct partial_die_info
*pdi
,
7101 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7102 int set_addrmap
, struct dwarf2_cu
*cu
)
7104 if (pdi
->tag
== DW_TAG_subprogram
)
7106 if (pdi
->has_pc_info
)
7108 if (pdi
->lowpc
< *lowpc
)
7109 *lowpc
= pdi
->lowpc
;
7110 if (pdi
->highpc
> *highpc
)
7111 *highpc
= pdi
->highpc
;
7114 struct objfile
*objfile
= cu
->objfile
;
7115 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7120 baseaddr
= ANOFFSET (objfile
->section_offsets
,
7121 SECT_OFF_TEXT (objfile
));
7122 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7123 pdi
->lowpc
+ baseaddr
);
7124 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7125 pdi
->highpc
+ baseaddr
);
7126 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
7127 cu
->per_cu
->v
.psymtab
);
7131 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
7133 if (!pdi
->is_declaration
)
7134 /* Ignore subprogram DIEs that do not have a name, they are
7135 illegal. Do not emit a complaint at this point, we will
7136 do so when we convert this psymtab into a symtab. */
7138 add_partial_symbol (pdi
, cu
);
7142 if (! pdi
->has_children
)
7145 if (cu
->language
== language_ada
)
7147 pdi
= pdi
->die_child
;
7150 fixup_partial_die (pdi
, cu
);
7151 if (pdi
->tag
== DW_TAG_subprogram
7152 || pdi
->tag
== DW_TAG_lexical_block
)
7153 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
7154 pdi
= pdi
->die_sibling
;
7159 /* Read a partial die corresponding to an enumeration type. */
7162 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
7163 struct dwarf2_cu
*cu
)
7165 struct partial_die_info
*pdi
;
7167 if (enum_pdi
->name
!= NULL
)
7168 add_partial_symbol (enum_pdi
, cu
);
7170 pdi
= enum_pdi
->die_child
;
7173 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
7174 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
7176 add_partial_symbol (pdi
, cu
);
7177 pdi
= pdi
->die_sibling
;
7181 /* Return the initial uleb128 in the die at INFO_PTR. */
7184 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
7186 unsigned int bytes_read
;
7188 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7191 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
7192 Return the corresponding abbrev, or NULL if the number is zero (indicating
7193 an empty DIE). In either case *BYTES_READ will be set to the length of
7194 the initial number. */
7196 static struct abbrev_info
*
7197 peek_die_abbrev (const gdb_byte
*info_ptr
, unsigned int *bytes_read
,
7198 struct dwarf2_cu
*cu
)
7200 bfd
*abfd
= cu
->objfile
->obfd
;
7201 unsigned int abbrev_number
;
7202 struct abbrev_info
*abbrev
;
7204 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
7206 if (abbrev_number
== 0)
7209 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
7212 error (_("Dwarf Error: Could not find abbrev number %d in %s"
7213 " at offset 0x%x [in module %s]"),
7214 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
7215 cu
->header
.offset
.sect_off
, bfd_get_filename (abfd
));
7221 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7222 Returns a pointer to the end of a series of DIEs, terminated by an empty
7223 DIE. Any children of the skipped DIEs will also be skipped. */
7225 static const gdb_byte
*
7226 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
7228 struct dwarf2_cu
*cu
= reader
->cu
;
7229 struct abbrev_info
*abbrev
;
7230 unsigned int bytes_read
;
7234 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
7236 return info_ptr
+ bytes_read
;
7238 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
7242 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7243 INFO_PTR should point just after the initial uleb128 of a DIE, and the
7244 abbrev corresponding to that skipped uleb128 should be passed in
7245 ABBREV. Returns a pointer to this DIE's sibling, skipping any
7248 static const gdb_byte
*
7249 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
7250 struct abbrev_info
*abbrev
)
7252 unsigned int bytes_read
;
7253 struct attribute attr
;
7254 bfd
*abfd
= reader
->abfd
;
7255 struct dwarf2_cu
*cu
= reader
->cu
;
7256 const gdb_byte
*buffer
= reader
->buffer
;
7257 const gdb_byte
*buffer_end
= reader
->buffer_end
;
7258 unsigned int form
, i
;
7260 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
7262 /* The only abbrev we care about is DW_AT_sibling. */
7263 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
7265 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
7266 if (attr
.form
== DW_FORM_ref_addr
)
7267 complaint (&symfile_complaints
,
7268 _("ignoring absolute DW_AT_sibling"));
7271 unsigned int off
= dwarf2_get_ref_die_offset (&attr
).sect_off
;
7272 const gdb_byte
*sibling_ptr
= buffer
+ off
;
7274 if (sibling_ptr
< info_ptr
)
7275 complaint (&symfile_complaints
,
7276 _("DW_AT_sibling points backwards"));
7277 else if (sibling_ptr
> reader
->buffer_end
)
7278 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
7284 /* If it isn't DW_AT_sibling, skip this attribute. */
7285 form
= abbrev
->attrs
[i
].form
;
7289 case DW_FORM_ref_addr
:
7290 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
7291 and later it is offset sized. */
7292 if (cu
->header
.version
== 2)
7293 info_ptr
+= cu
->header
.addr_size
;
7295 info_ptr
+= cu
->header
.offset_size
;
7297 case DW_FORM_GNU_ref_alt
:
7298 info_ptr
+= cu
->header
.offset_size
;
7301 info_ptr
+= cu
->header
.addr_size
;
7308 case DW_FORM_flag_present
:
7320 case DW_FORM_ref_sig8
:
7323 case DW_FORM_string
:
7324 read_direct_string (abfd
, info_ptr
, &bytes_read
);
7325 info_ptr
+= bytes_read
;
7327 case DW_FORM_sec_offset
:
7329 case DW_FORM_GNU_strp_alt
:
7330 info_ptr
+= cu
->header
.offset_size
;
7332 case DW_FORM_exprloc
:
7334 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7335 info_ptr
+= bytes_read
;
7337 case DW_FORM_block1
:
7338 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
7340 case DW_FORM_block2
:
7341 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
7343 case DW_FORM_block4
:
7344 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
7348 case DW_FORM_ref_udata
:
7349 case DW_FORM_GNU_addr_index
:
7350 case DW_FORM_GNU_str_index
:
7351 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
7353 case DW_FORM_indirect
:
7354 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7355 info_ptr
+= bytes_read
;
7356 /* We need to continue parsing from here, so just go back to
7358 goto skip_attribute
;
7361 error (_("Dwarf Error: Cannot handle %s "
7362 "in DWARF reader [in module %s]"),
7363 dwarf_form_name (form
),
7364 bfd_get_filename (abfd
));
7368 if (abbrev
->has_children
)
7369 return skip_children (reader
, info_ptr
);
7374 /* Locate ORIG_PDI's sibling.
7375 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
7377 static const gdb_byte
*
7378 locate_pdi_sibling (const struct die_reader_specs
*reader
,
7379 struct partial_die_info
*orig_pdi
,
7380 const gdb_byte
*info_ptr
)
7382 /* Do we know the sibling already? */
7384 if (orig_pdi
->sibling
)
7385 return orig_pdi
->sibling
;
7387 /* Are there any children to deal with? */
7389 if (!orig_pdi
->has_children
)
7392 /* Skip the children the long way. */
7394 return skip_children (reader
, info_ptr
);
7397 /* Expand this partial symbol table into a full symbol table. SELF is
7401 dwarf2_read_symtab (struct partial_symtab
*self
,
7402 struct objfile
*objfile
)
7406 warning (_("bug: psymtab for %s is already read in."),
7413 printf_filtered (_("Reading in symbols for %s..."),
7415 gdb_flush (gdb_stdout
);
7418 /* Restore our global data. */
7420 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
7421 dwarf2_objfile_data_key
);
7423 /* If this psymtab is constructed from a debug-only objfile, the
7424 has_section_at_zero flag will not necessarily be correct. We
7425 can get the correct value for this flag by looking at the data
7426 associated with the (presumably stripped) associated objfile. */
7427 if (objfile
->separate_debug_objfile_backlink
)
7429 struct dwarf2_per_objfile
*dpo_backlink
7430 = ((struct dwarf2_per_objfile
*)
7431 objfile_data (objfile
->separate_debug_objfile_backlink
,
7432 dwarf2_objfile_data_key
));
7434 dwarf2_per_objfile
->has_section_at_zero
7435 = dpo_backlink
->has_section_at_zero
;
7438 dwarf2_per_objfile
->reading_partial_symbols
= 0;
7440 psymtab_to_symtab_1 (self
);
7442 /* Finish up the debug error message. */
7444 printf_filtered (_("done.\n"));
7447 process_cu_includes ();
7450 /* Reading in full CUs. */
7452 /* Add PER_CU to the queue. */
7455 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
7456 enum language pretend_language
)
7458 struct dwarf2_queue_item
*item
;
7461 item
= XNEW (struct dwarf2_queue_item
);
7462 item
->per_cu
= per_cu
;
7463 item
->pretend_language
= pretend_language
;
7466 if (dwarf2_queue
== NULL
)
7467 dwarf2_queue
= item
;
7469 dwarf2_queue_tail
->next
= item
;
7471 dwarf2_queue_tail
= item
;
7474 /* If PER_CU is not yet queued, add it to the queue.
7475 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
7477 The result is non-zero if PER_CU was queued, otherwise the result is zero
7478 meaning either PER_CU is already queued or it is already loaded.
7480 N.B. There is an invariant here that if a CU is queued then it is loaded.
7481 The caller is required to load PER_CU if we return non-zero. */
7484 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
7485 struct dwarf2_per_cu_data
*per_cu
,
7486 enum language pretend_language
)
7488 /* We may arrive here during partial symbol reading, if we need full
7489 DIEs to process an unusual case (e.g. template arguments). Do
7490 not queue PER_CU, just tell our caller to load its DIEs. */
7491 if (dwarf2_per_objfile
->reading_partial_symbols
)
7493 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
7498 /* Mark the dependence relation so that we don't flush PER_CU
7500 if (dependent_cu
!= NULL
)
7501 dwarf2_add_dependence (dependent_cu
, per_cu
);
7503 /* If it's already on the queue, we have nothing to do. */
7507 /* If the compilation unit is already loaded, just mark it as
7509 if (per_cu
->cu
!= NULL
)
7511 per_cu
->cu
->last_used
= 0;
7515 /* Add it to the queue. */
7516 queue_comp_unit (per_cu
, pretend_language
);
7521 /* Process the queue. */
7524 process_queue (void)
7526 struct dwarf2_queue_item
*item
, *next_item
;
7528 if (dwarf_read_debug
)
7530 fprintf_unfiltered (gdb_stdlog
,
7531 "Expanding one or more symtabs of objfile %s ...\n",
7532 objfile_name (dwarf2_per_objfile
->objfile
));
7535 /* The queue starts out with one item, but following a DIE reference
7536 may load a new CU, adding it to the end of the queue. */
7537 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
7539 if ((dwarf2_per_objfile
->using_index
7540 ? !item
->per_cu
->v
.quick
->compunit_symtab
7541 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
7542 /* Skip dummy CUs. */
7543 && item
->per_cu
->cu
!= NULL
)
7545 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
7546 unsigned int debug_print_threshold
;
7549 if (per_cu
->is_debug_types
)
7551 struct signatured_type
*sig_type
=
7552 (struct signatured_type
*) per_cu
;
7554 sprintf (buf
, "TU %s at offset 0x%x",
7555 hex_string (sig_type
->signature
),
7556 per_cu
->offset
.sect_off
);
7557 /* There can be 100s of TUs.
7558 Only print them in verbose mode. */
7559 debug_print_threshold
= 2;
7563 sprintf (buf
, "CU at offset 0x%x", per_cu
->offset
.sect_off
);
7564 debug_print_threshold
= 1;
7567 if (dwarf_read_debug
>= debug_print_threshold
)
7568 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
7570 if (per_cu
->is_debug_types
)
7571 process_full_type_unit (per_cu
, item
->pretend_language
);
7573 process_full_comp_unit (per_cu
, item
->pretend_language
);
7575 if (dwarf_read_debug
>= debug_print_threshold
)
7576 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
7579 item
->per_cu
->queued
= 0;
7580 next_item
= item
->next
;
7584 dwarf2_queue_tail
= NULL
;
7586 if (dwarf_read_debug
)
7588 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
7589 objfile_name (dwarf2_per_objfile
->objfile
));
7593 /* Free all allocated queue entries. This function only releases anything if
7594 an error was thrown; if the queue was processed then it would have been
7595 freed as we went along. */
7598 dwarf2_release_queue (void *dummy
)
7600 struct dwarf2_queue_item
*item
, *last
;
7602 item
= dwarf2_queue
;
7605 /* Anything still marked queued is likely to be in an
7606 inconsistent state, so discard it. */
7607 if (item
->per_cu
->queued
)
7609 if (item
->per_cu
->cu
!= NULL
)
7610 free_one_cached_comp_unit (item
->per_cu
);
7611 item
->per_cu
->queued
= 0;
7619 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
7622 /* Read in full symbols for PST, and anything it depends on. */
7625 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
7627 struct dwarf2_per_cu_data
*per_cu
;
7633 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
7634 if (!pst
->dependencies
[i
]->readin
7635 && pst
->dependencies
[i
]->user
== NULL
)
7637 /* Inform about additional files that need to be read in. */
7640 /* FIXME: i18n: Need to make this a single string. */
7641 fputs_filtered (" ", gdb_stdout
);
7643 fputs_filtered ("and ", gdb_stdout
);
7645 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
7646 wrap_here (""); /* Flush output. */
7647 gdb_flush (gdb_stdout
);
7649 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
7652 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
7656 /* It's an include file, no symbols to read for it.
7657 Everything is in the parent symtab. */
7662 dw2_do_instantiate_symtab (per_cu
);
7665 /* Trivial hash function for die_info: the hash value of a DIE
7666 is its offset in .debug_info for this objfile. */
7669 die_hash (const void *item
)
7671 const struct die_info
*die
= (const struct die_info
*) item
;
7673 return die
->offset
.sect_off
;
7676 /* Trivial comparison function for die_info structures: two DIEs
7677 are equal if they have the same offset. */
7680 die_eq (const void *item_lhs
, const void *item_rhs
)
7682 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
7683 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
7685 return die_lhs
->offset
.sect_off
== die_rhs
->offset
.sect_off
;
7688 /* die_reader_func for load_full_comp_unit.
7689 This is identical to read_signatured_type_reader,
7690 but is kept separate for now. */
7693 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
7694 const gdb_byte
*info_ptr
,
7695 struct die_info
*comp_unit_die
,
7699 struct dwarf2_cu
*cu
= reader
->cu
;
7700 enum language
*language_ptr
= (enum language
*) data
;
7702 gdb_assert (cu
->die_hash
== NULL
);
7704 htab_create_alloc_ex (cu
->header
.length
/ 12,
7708 &cu
->comp_unit_obstack
,
7709 hashtab_obstack_allocate
,
7710 dummy_obstack_deallocate
);
7713 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
7714 &info_ptr
, comp_unit_die
);
7715 cu
->dies
= comp_unit_die
;
7716 /* comp_unit_die is not stored in die_hash, no need. */
7718 /* We try not to read any attributes in this function, because not
7719 all CUs needed for references have been loaded yet, and symbol
7720 table processing isn't initialized. But we have to set the CU language,
7721 or we won't be able to build types correctly.
7722 Similarly, if we do not read the producer, we can not apply
7723 producer-specific interpretation. */
7724 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
7727 /* Load the DIEs associated with PER_CU into memory. */
7730 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
7731 enum language pretend_language
)
7733 gdb_assert (! this_cu
->is_debug_types
);
7735 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
7736 load_full_comp_unit_reader
, &pretend_language
);
7739 /* Add a DIE to the delayed physname list. */
7742 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
7743 const char *name
, struct die_info
*die
,
7744 struct dwarf2_cu
*cu
)
7746 struct delayed_method_info mi
;
7748 mi
.fnfield_index
= fnfield_index
;
7752 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
7755 /* A cleanup for freeing the delayed method list. */
7758 free_delayed_list (void *ptr
)
7760 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
7761 if (cu
->method_list
!= NULL
)
7763 VEC_free (delayed_method_info
, cu
->method_list
);
7764 cu
->method_list
= NULL
;
7768 /* Compute the physnames of any methods on the CU's method list.
7770 The computation of method physnames is delayed in order to avoid the
7771 (bad) condition that one of the method's formal parameters is of an as yet
7775 compute_delayed_physnames (struct dwarf2_cu
*cu
)
7778 struct delayed_method_info
*mi
;
7779 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
7781 const char *physname
;
7782 struct fn_fieldlist
*fn_flp
7783 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
7784 physname
= dwarf2_physname (mi
->name
, mi
->die
, cu
);
7785 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
->index
)
7786 = physname
? physname
: "";
7790 /* Go objects should be embedded in a DW_TAG_module DIE,
7791 and it's not clear if/how imported objects will appear.
7792 To keep Go support simple until that's worked out,
7793 go back through what we've read and create something usable.
7794 We could do this while processing each DIE, and feels kinda cleaner,
7795 but that way is more invasive.
7796 This is to, for example, allow the user to type "p var" or "b main"
7797 without having to specify the package name, and allow lookups
7798 of module.object to work in contexts that use the expression
7802 fixup_go_packaging (struct dwarf2_cu
*cu
)
7804 char *package_name
= NULL
;
7805 struct pending
*list
;
7808 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
7810 for (i
= 0; i
< list
->nsyms
; ++i
)
7812 struct symbol
*sym
= list
->symbol
[i
];
7814 if (SYMBOL_LANGUAGE (sym
) == language_go
7815 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
7817 char *this_package_name
= go_symbol_package_name (sym
);
7819 if (this_package_name
== NULL
)
7821 if (package_name
== NULL
)
7822 package_name
= this_package_name
;
7825 if (strcmp (package_name
, this_package_name
) != 0)
7826 complaint (&symfile_complaints
,
7827 _("Symtab %s has objects from two different Go packages: %s and %s"),
7828 (symbol_symtab (sym
) != NULL
7829 ? symtab_to_filename_for_display
7830 (symbol_symtab (sym
))
7831 : objfile_name (cu
->objfile
)),
7832 this_package_name
, package_name
);
7833 xfree (this_package_name
);
7839 if (package_name
!= NULL
)
7841 struct objfile
*objfile
= cu
->objfile
;
7842 const char *saved_package_name
7843 = (const char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
7845 strlen (package_name
));
7846 struct type
*type
= init_type (TYPE_CODE_MODULE
, 0, 0,
7847 saved_package_name
, objfile
);
7850 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
7852 sym
= allocate_symbol (objfile
);
7853 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
7854 SYMBOL_SET_NAMES (sym
, saved_package_name
,
7855 strlen (saved_package_name
), 0, objfile
);
7856 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
7857 e.g., "main" finds the "main" module and not C's main(). */
7858 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
7859 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
7860 SYMBOL_TYPE (sym
) = type
;
7862 add_symbol_to_list (sym
, &global_symbols
);
7864 xfree (package_name
);
7868 /* Return the symtab for PER_CU. This works properly regardless of
7869 whether we're using the index or psymtabs. */
7871 static struct compunit_symtab
*
7872 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
7874 return (dwarf2_per_objfile
->using_index
7875 ? per_cu
->v
.quick
->compunit_symtab
7876 : per_cu
->v
.psymtab
->compunit_symtab
);
7879 /* A helper function for computing the list of all symbol tables
7880 included by PER_CU. */
7883 recursively_compute_inclusions (VEC (compunit_symtab_ptr
) **result
,
7884 htab_t all_children
, htab_t all_type_symtabs
,
7885 struct dwarf2_per_cu_data
*per_cu
,
7886 struct compunit_symtab
*immediate_parent
)
7890 struct compunit_symtab
*cust
;
7891 struct dwarf2_per_cu_data
*iter
;
7893 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
7896 /* This inclusion and its children have been processed. */
7901 /* Only add a CU if it has a symbol table. */
7902 cust
= get_compunit_symtab (per_cu
);
7905 /* If this is a type unit only add its symbol table if we haven't
7906 seen it yet (type unit per_cu's can share symtabs). */
7907 if (per_cu
->is_debug_types
)
7909 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
7913 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
7914 if (cust
->user
== NULL
)
7915 cust
->user
= immediate_parent
;
7920 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
7921 if (cust
->user
== NULL
)
7922 cust
->user
= immediate_parent
;
7927 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
7930 recursively_compute_inclusions (result
, all_children
,
7931 all_type_symtabs
, iter
, cust
);
7935 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
7939 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
7941 gdb_assert (! per_cu
->is_debug_types
);
7943 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
7946 struct dwarf2_per_cu_data
*per_cu_iter
;
7947 struct compunit_symtab
*compunit_symtab_iter
;
7948 VEC (compunit_symtab_ptr
) *result_symtabs
= NULL
;
7949 htab_t all_children
, all_type_symtabs
;
7950 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
7952 /* If we don't have a symtab, we can just skip this case. */
7956 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
7957 NULL
, xcalloc
, xfree
);
7958 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
7959 NULL
, xcalloc
, xfree
);
7962 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
7966 recursively_compute_inclusions (&result_symtabs
, all_children
,
7967 all_type_symtabs
, per_cu_iter
,
7971 /* Now we have a transitive closure of all the included symtabs. */
7972 len
= VEC_length (compunit_symtab_ptr
, result_symtabs
);
7974 = XOBNEWVEC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
7975 struct compunit_symtab
*, len
+ 1);
7977 VEC_iterate (compunit_symtab_ptr
, result_symtabs
, ix
,
7978 compunit_symtab_iter
);
7980 cust
->includes
[ix
] = compunit_symtab_iter
;
7981 cust
->includes
[len
] = NULL
;
7983 VEC_free (compunit_symtab_ptr
, result_symtabs
);
7984 htab_delete (all_children
);
7985 htab_delete (all_type_symtabs
);
7989 /* Compute the 'includes' field for the symtabs of all the CUs we just
7993 process_cu_includes (void)
7996 struct dwarf2_per_cu_data
*iter
;
7999 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
8003 if (! iter
->is_debug_types
)
8004 compute_compunit_symtab_includes (iter
);
8007 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
8010 /* Generate full symbol information for PER_CU, whose DIEs have
8011 already been loaded into memory. */
8014 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
8015 enum language pretend_language
)
8017 struct dwarf2_cu
*cu
= per_cu
->cu
;
8018 struct objfile
*objfile
= per_cu
->objfile
;
8019 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8020 CORE_ADDR lowpc
, highpc
;
8021 struct compunit_symtab
*cust
;
8022 struct cleanup
*back_to
, *delayed_list_cleanup
;
8024 struct block
*static_block
;
8027 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8030 back_to
= make_cleanup (really_free_pendings
, NULL
);
8031 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
8033 cu
->list_in_scope
= &file_symbols
;
8035 cu
->language
= pretend_language
;
8036 cu
->language_defn
= language_def (cu
->language
);
8038 /* Do line number decoding in read_file_scope () */
8039 process_die (cu
->dies
, cu
);
8041 /* For now fudge the Go package. */
8042 if (cu
->language
== language_go
)
8043 fixup_go_packaging (cu
);
8045 /* Now that we have processed all the DIEs in the CU, all the types
8046 should be complete, and it should now be safe to compute all of the
8048 compute_delayed_physnames (cu
);
8049 do_cleanups (delayed_list_cleanup
);
8051 /* Some compilers don't define a DW_AT_high_pc attribute for the
8052 compilation unit. If the DW_AT_high_pc is missing, synthesize
8053 it, by scanning the DIE's below the compilation unit. */
8054 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
8056 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
8057 static_block
= end_symtab_get_static_block (addr
, 0, 1);
8059 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
8060 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
8061 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
8062 addrmap to help ensure it has an accurate map of pc values belonging to
8064 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
8066 cust
= end_symtab_from_static_block (static_block
,
8067 SECT_OFF_TEXT (objfile
), 0);
8071 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
8073 /* Set symtab language to language from DW_AT_language. If the
8074 compilation is from a C file generated by language preprocessors, do
8075 not set the language if it was already deduced by start_subfile. */
8076 if (!(cu
->language
== language_c
8077 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
8078 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8080 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
8081 produce DW_AT_location with location lists but it can be possibly
8082 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
8083 there were bugs in prologue debug info, fixed later in GCC-4.5
8084 by "unwind info for epilogues" patch (which is not directly related).
8086 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
8087 needed, it would be wrong due to missing DW_AT_producer there.
8089 Still one can confuse GDB by using non-standard GCC compilation
8090 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
8092 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
8093 cust
->locations_valid
= 1;
8095 if (gcc_4_minor
>= 5)
8096 cust
->epilogue_unwind_valid
= 1;
8098 cust
->call_site_htab
= cu
->call_site_htab
;
8101 if (dwarf2_per_objfile
->using_index
)
8102 per_cu
->v
.quick
->compunit_symtab
= cust
;
8105 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8106 pst
->compunit_symtab
= cust
;
8110 /* Push it for inclusion processing later. */
8111 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
8113 do_cleanups (back_to
);
8116 /* Generate full symbol information for type unit PER_CU, whose DIEs have
8117 already been loaded into memory. */
8120 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
8121 enum language pretend_language
)
8123 struct dwarf2_cu
*cu
= per_cu
->cu
;
8124 struct objfile
*objfile
= per_cu
->objfile
;
8125 struct compunit_symtab
*cust
;
8126 struct cleanup
*back_to
, *delayed_list_cleanup
;
8127 struct signatured_type
*sig_type
;
8129 gdb_assert (per_cu
->is_debug_types
);
8130 sig_type
= (struct signatured_type
*) per_cu
;
8133 back_to
= make_cleanup (really_free_pendings
, NULL
);
8134 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
8136 cu
->list_in_scope
= &file_symbols
;
8138 cu
->language
= pretend_language
;
8139 cu
->language_defn
= language_def (cu
->language
);
8141 /* The symbol tables are set up in read_type_unit_scope. */
8142 process_die (cu
->dies
, cu
);
8144 /* For now fudge the Go package. */
8145 if (cu
->language
== language_go
)
8146 fixup_go_packaging (cu
);
8148 /* Now that we have processed all the DIEs in the CU, all the types
8149 should be complete, and it should now be safe to compute all of the
8151 compute_delayed_physnames (cu
);
8152 do_cleanups (delayed_list_cleanup
);
8154 /* TUs share symbol tables.
8155 If this is the first TU to use this symtab, complete the construction
8156 of it with end_expandable_symtab. Otherwise, complete the addition of
8157 this TU's symbols to the existing symtab. */
8158 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
8160 cust
= end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
8161 sig_type
->type_unit_group
->compunit_symtab
= cust
;
8165 /* Set symtab language to language from DW_AT_language. If the
8166 compilation is from a C file generated by language preprocessors,
8167 do not set the language if it was already deduced by
8169 if (!(cu
->language
== language_c
8170 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
8171 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8176 augment_type_symtab ();
8177 cust
= sig_type
->type_unit_group
->compunit_symtab
;
8180 if (dwarf2_per_objfile
->using_index
)
8181 per_cu
->v
.quick
->compunit_symtab
= cust
;
8184 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8185 pst
->compunit_symtab
= cust
;
8189 do_cleanups (back_to
);
8192 /* Process an imported unit DIE. */
8195 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8197 struct attribute
*attr
;
8199 /* For now we don't handle imported units in type units. */
8200 if (cu
->per_cu
->is_debug_types
)
8202 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8203 " supported in type units [in module %s]"),
8204 objfile_name (cu
->objfile
));
8207 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8210 struct dwarf2_per_cu_data
*per_cu
;
8214 offset
= dwarf2_get_ref_die_offset (attr
);
8215 is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
8216 per_cu
= dwarf2_find_containing_comp_unit (offset
, is_dwz
, cu
->objfile
);
8218 /* If necessary, add it to the queue and load its DIEs. */
8219 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
8220 load_full_comp_unit (per_cu
, cu
->language
);
8222 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
8227 /* Reset the in_process bit of a die. */
8230 reset_die_in_process (void *arg
)
8232 struct die_info
*die
= (struct die_info
*) arg
;
8234 die
->in_process
= 0;
8237 /* Process a die and its children. */
8240 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8242 struct cleanup
*in_process
;
8244 /* We should only be processing those not already in process. */
8245 gdb_assert (!die
->in_process
);
8247 die
->in_process
= 1;
8248 in_process
= make_cleanup (reset_die_in_process
,die
);
8252 case DW_TAG_padding
:
8254 case DW_TAG_compile_unit
:
8255 case DW_TAG_partial_unit
:
8256 read_file_scope (die
, cu
);
8258 case DW_TAG_type_unit
:
8259 read_type_unit_scope (die
, cu
);
8261 case DW_TAG_subprogram
:
8262 case DW_TAG_inlined_subroutine
:
8263 read_func_scope (die
, cu
);
8265 case DW_TAG_lexical_block
:
8266 case DW_TAG_try_block
:
8267 case DW_TAG_catch_block
:
8268 read_lexical_block_scope (die
, cu
);
8270 case DW_TAG_GNU_call_site
:
8271 read_call_site_scope (die
, cu
);
8273 case DW_TAG_class_type
:
8274 case DW_TAG_interface_type
:
8275 case DW_TAG_structure_type
:
8276 case DW_TAG_union_type
:
8277 process_structure_scope (die
, cu
);
8279 case DW_TAG_enumeration_type
:
8280 process_enumeration_scope (die
, cu
);
8283 /* These dies have a type, but processing them does not create
8284 a symbol or recurse to process the children. Therefore we can
8285 read them on-demand through read_type_die. */
8286 case DW_TAG_subroutine_type
:
8287 case DW_TAG_set_type
:
8288 case DW_TAG_array_type
:
8289 case DW_TAG_pointer_type
:
8290 case DW_TAG_ptr_to_member_type
:
8291 case DW_TAG_reference_type
:
8292 case DW_TAG_string_type
:
8295 case DW_TAG_base_type
:
8296 case DW_TAG_subrange_type
:
8297 case DW_TAG_typedef
:
8298 /* Add a typedef symbol for the type definition, if it has a
8300 new_symbol (die
, read_type_die (die
, cu
), cu
);
8302 case DW_TAG_common_block
:
8303 read_common_block (die
, cu
);
8305 case DW_TAG_common_inclusion
:
8307 case DW_TAG_namespace
:
8308 cu
->processing_has_namespace_info
= 1;
8309 read_namespace (die
, cu
);
8312 cu
->processing_has_namespace_info
= 1;
8313 read_module (die
, cu
);
8315 case DW_TAG_imported_declaration
:
8316 cu
->processing_has_namespace_info
= 1;
8317 if (read_namespace_alias (die
, cu
))
8319 /* The declaration is not a global namespace alias: fall through. */
8320 case DW_TAG_imported_module
:
8321 cu
->processing_has_namespace_info
= 1;
8322 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
8323 || cu
->language
!= language_fortran
))
8324 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
8325 dwarf_tag_name (die
->tag
));
8326 read_import_statement (die
, cu
);
8329 case DW_TAG_imported_unit
:
8330 process_imported_unit_die (die
, cu
);
8334 new_symbol (die
, NULL
, cu
);
8338 do_cleanups (in_process
);
8341 /* DWARF name computation. */
8343 /* A helper function for dwarf2_compute_name which determines whether DIE
8344 needs to have the name of the scope prepended to the name listed in the
8348 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
8350 struct attribute
*attr
;
8354 case DW_TAG_namespace
:
8355 case DW_TAG_typedef
:
8356 case DW_TAG_class_type
:
8357 case DW_TAG_interface_type
:
8358 case DW_TAG_structure_type
:
8359 case DW_TAG_union_type
:
8360 case DW_TAG_enumeration_type
:
8361 case DW_TAG_enumerator
:
8362 case DW_TAG_subprogram
:
8363 case DW_TAG_inlined_subroutine
:
8365 case DW_TAG_imported_declaration
:
8368 case DW_TAG_variable
:
8369 case DW_TAG_constant
:
8370 /* We only need to prefix "globally" visible variables. These include
8371 any variable marked with DW_AT_external or any variable that
8372 lives in a namespace. [Variables in anonymous namespaces
8373 require prefixing, but they are not DW_AT_external.] */
8375 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
8377 struct dwarf2_cu
*spec_cu
= cu
;
8379 return die_needs_namespace (die_specification (die
, &spec_cu
),
8383 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
8384 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
8385 && die
->parent
->tag
!= DW_TAG_module
)
8387 /* A variable in a lexical block of some kind does not need a
8388 namespace, even though in C++ such variables may be external
8389 and have a mangled name. */
8390 if (die
->parent
->tag
== DW_TAG_lexical_block
8391 || die
->parent
->tag
== DW_TAG_try_block
8392 || die
->parent
->tag
== DW_TAG_catch_block
8393 || die
->parent
->tag
== DW_TAG_subprogram
)
8402 /* Retrieve the last character from a mem_file. */
8405 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
8407 char *last_char_p
= (char *) object
;
8410 *last_char_p
= buffer
[length
- 1];
8413 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
8414 compute the physname for the object, which include a method's:
8415 - formal parameters (C++/Java),
8416 - receiver type (Go),
8417 - return type (Java).
8419 The term "physname" is a bit confusing.
8420 For C++, for example, it is the demangled name.
8421 For Go, for example, it's the mangled name.
8423 For Ada, return the DIE's linkage name rather than the fully qualified
8424 name. PHYSNAME is ignored..
8426 The result is allocated on the objfile_obstack and canonicalized. */
8429 dwarf2_compute_name (const char *name
,
8430 struct die_info
*die
, struct dwarf2_cu
*cu
,
8433 struct objfile
*objfile
= cu
->objfile
;
8436 name
= dwarf2_name (die
, cu
);
8438 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
8439 but otherwise compute it by typename_concat inside GDB.
8440 FIXME: Actually this is not really true, or at least not always true.
8441 It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle
8442 Fortran names because there is no mangling standard. So new_symbol_full
8443 will set the demangled name to the result of dwarf2_full_name, and it is
8444 the demangled name that GDB uses if it exists. */
8445 if (cu
->language
== language_ada
8446 || (cu
->language
== language_fortran
&& physname
))
8448 /* For Ada unit, we prefer the linkage name over the name, as
8449 the former contains the exported name, which the user expects
8450 to be able to reference. Ideally, we want the user to be able
8451 to reference this entity using either natural or linkage name,
8452 but we haven't started looking at this enhancement yet. */
8453 const char *linkage_name
;
8455 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
8456 if (linkage_name
== NULL
)
8457 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8458 if (linkage_name
!= NULL
)
8459 return linkage_name
;
8462 /* These are the only languages we know how to qualify names in. */
8464 && (cu
->language
== language_cplus
|| cu
->language
== language_java
8465 || cu
->language
== language_fortran
|| cu
->language
== language_d
8466 || cu
->language
== language_rust
))
8468 if (die_needs_namespace (die
, cu
))
8472 struct ui_file
*buf
;
8473 char *intermediate_name
;
8474 const char *canonical_name
= NULL
;
8476 prefix
= determine_prefix (die
, cu
);
8477 buf
= mem_fileopen ();
8478 if (*prefix
!= '\0')
8480 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
8483 fputs_unfiltered (prefixed_name
, buf
);
8484 xfree (prefixed_name
);
8487 fputs_unfiltered (name
, buf
);
8489 /* Template parameters may be specified in the DIE's DW_AT_name, or
8490 as children with DW_TAG_template_type_param or
8491 DW_TAG_value_type_param. If the latter, add them to the name
8492 here. If the name already has template parameters, then
8493 skip this step; some versions of GCC emit both, and
8494 it is more efficient to use the pre-computed name.
8496 Something to keep in mind about this process: it is very
8497 unlikely, or in some cases downright impossible, to produce
8498 something that will match the mangled name of a function.
8499 If the definition of the function has the same debug info,
8500 we should be able to match up with it anyway. But fallbacks
8501 using the minimal symbol, for instance to find a method
8502 implemented in a stripped copy of libstdc++, will not work.
8503 If we do not have debug info for the definition, we will have to
8504 match them up some other way.
8506 When we do name matching there is a related problem with function
8507 templates; two instantiated function templates are allowed to
8508 differ only by their return types, which we do not add here. */
8510 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
8512 struct attribute
*attr
;
8513 struct die_info
*child
;
8516 die
->building_fullname
= 1;
8518 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
8522 const gdb_byte
*bytes
;
8523 struct dwarf2_locexpr_baton
*baton
;
8526 if (child
->tag
!= DW_TAG_template_type_param
8527 && child
->tag
!= DW_TAG_template_value_param
)
8532 fputs_unfiltered ("<", buf
);
8536 fputs_unfiltered (", ", buf
);
8538 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
8541 complaint (&symfile_complaints
,
8542 _("template parameter missing DW_AT_type"));
8543 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
8546 type
= die_type (child
, cu
);
8548 if (child
->tag
== DW_TAG_template_type_param
)
8550 c_print_type (type
, "", buf
, -1, 0, &type_print_raw_options
);
8554 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
8557 complaint (&symfile_complaints
,
8558 _("template parameter missing "
8559 "DW_AT_const_value"));
8560 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
8564 dwarf2_const_value_attr (attr
, type
, name
,
8565 &cu
->comp_unit_obstack
, cu
,
8566 &value
, &bytes
, &baton
);
8568 if (TYPE_NOSIGN (type
))
8569 /* GDB prints characters as NUMBER 'CHAR'. If that's
8570 changed, this can use value_print instead. */
8571 c_printchar (value
, type
, buf
);
8574 struct value_print_options opts
;
8577 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
8581 else if (bytes
!= NULL
)
8583 v
= allocate_value (type
);
8584 memcpy (value_contents_writeable (v
), bytes
,
8585 TYPE_LENGTH (type
));
8588 v
= value_from_longest (type
, value
);
8590 /* Specify decimal so that we do not depend on
8592 get_formatted_print_options (&opts
, 'd');
8594 value_print (v
, buf
, &opts
);
8600 die
->building_fullname
= 0;
8604 /* Close the argument list, with a space if necessary
8605 (nested templates). */
8606 char last_char
= '\0';
8607 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
8608 if (last_char
== '>')
8609 fputs_unfiltered (" >", buf
);
8611 fputs_unfiltered (">", buf
);
8615 /* For Java and C++ methods, append formal parameter type
8616 information, if PHYSNAME. */
8618 if (physname
&& die
->tag
== DW_TAG_subprogram
8619 && (cu
->language
== language_cplus
8620 || cu
->language
== language_java
))
8622 struct type
*type
= read_type_die (die
, cu
);
8624 c_type_print_args (type
, buf
, 1, cu
->language
,
8625 &type_print_raw_options
);
8627 if (cu
->language
== language_java
)
8629 /* For java, we must append the return type to method
8631 if (die
->tag
== DW_TAG_subprogram
)
8632 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
8633 0, 0, &type_print_raw_options
);
8635 else if (cu
->language
== language_cplus
)
8637 /* Assume that an artificial first parameter is
8638 "this", but do not crash if it is not. RealView
8639 marks unnamed (and thus unused) parameters as
8640 artificial; there is no way to differentiate
8642 if (TYPE_NFIELDS (type
) > 0
8643 && TYPE_FIELD_ARTIFICIAL (type
, 0)
8644 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
8645 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
8647 fputs_unfiltered (" const", buf
);
8651 intermediate_name
= ui_file_xstrdup (buf
, &length
);
8652 ui_file_delete (buf
);
8654 if (cu
->language
== language_cplus
)
8656 = dwarf2_canonicalize_name (intermediate_name
, cu
,
8657 &objfile
->per_bfd
->storage_obstack
);
8659 /* If we only computed INTERMEDIATE_NAME, or if
8660 INTERMEDIATE_NAME is already canonical, then we need to
8661 copy it to the appropriate obstack. */
8662 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
)
8663 name
= ((const char *)
8664 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8666 strlen (intermediate_name
)));
8668 name
= canonical_name
;
8670 xfree (intermediate_name
);
8677 /* Return the fully qualified name of DIE, based on its DW_AT_name.
8678 If scope qualifiers are appropriate they will be added. The result
8679 will be allocated on the storage_obstack, or NULL if the DIE does
8680 not have a name. NAME may either be from a previous call to
8681 dwarf2_name or NULL.
8683 The output string will be canonicalized (if C++/Java). */
8686 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
8688 return dwarf2_compute_name (name
, die
, cu
, 0);
8691 /* Construct a physname for the given DIE in CU. NAME may either be
8692 from a previous call to dwarf2_name or NULL. The result will be
8693 allocated on the objfile_objstack or NULL if the DIE does not have a
8696 The output string will be canonicalized (if C++/Java). */
8699 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
8701 struct objfile
*objfile
= cu
->objfile
;
8702 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
8703 struct cleanup
*back_to
;
8706 /* In this case dwarf2_compute_name is just a shortcut not building anything
8708 if (!die_needs_namespace (die
, cu
))
8709 return dwarf2_compute_name (name
, die
, cu
, 1);
8711 back_to
= make_cleanup (null_cleanup
, NULL
);
8713 mangled
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
8714 if (mangled
== NULL
)
8715 mangled
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8717 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
8719 if (mangled
!= NULL
)
8723 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
8724 type. It is easier for GDB users to search for such functions as
8725 `name(params)' than `long name(params)'. In such case the minimal
8726 symbol names do not match the full symbol names but for template
8727 functions there is never a need to look up their definition from their
8728 declaration so the only disadvantage remains the minimal symbol
8729 variant `long name(params)' does not have the proper inferior type.
8732 if (cu
->language
== language_go
)
8734 /* This is a lie, but we already lie to the caller new_symbol_full.
8735 new_symbol_full assumes we return the mangled name.
8736 This just undoes that lie until things are cleaned up. */
8741 demangled
= gdb_demangle (mangled
,
8742 (DMGL_PARAMS
| DMGL_ANSI
8743 | (cu
->language
== language_java
8744 ? DMGL_JAVA
| DMGL_RET_POSTFIX
8749 make_cleanup (xfree
, demangled
);
8759 if (canon
== NULL
|| check_physname
)
8761 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
8763 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
8765 /* It may not mean a bug in GDB. The compiler could also
8766 compute DW_AT_linkage_name incorrectly. But in such case
8767 GDB would need to be bug-to-bug compatible. */
8769 complaint (&symfile_complaints
,
8770 _("Computed physname <%s> does not match demangled <%s> "
8771 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
8772 physname
, canon
, mangled
, die
->offset
.sect_off
,
8773 objfile_name (objfile
));
8775 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
8776 is available here - over computed PHYSNAME. It is safer
8777 against both buggy GDB and buggy compilers. */
8791 retval
= ((const char *)
8792 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8793 retval
, strlen (retval
)));
8795 do_cleanups (back_to
);
8799 /* Inspect DIE in CU for a namespace alias. If one exists, record
8800 a new symbol for it.
8802 Returns 1 if a namespace alias was recorded, 0 otherwise. */
8805 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
8807 struct attribute
*attr
;
8809 /* If the die does not have a name, this is not a namespace
8811 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
8815 struct die_info
*d
= die
;
8816 struct dwarf2_cu
*imported_cu
= cu
;
8818 /* If the compiler has nested DW_AT_imported_declaration DIEs,
8819 keep inspecting DIEs until we hit the underlying import. */
8820 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
8821 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
8823 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
8827 d
= follow_die_ref (d
, attr
, &imported_cu
);
8828 if (d
->tag
!= DW_TAG_imported_declaration
)
8832 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
8834 complaint (&symfile_complaints
,
8835 _("DIE at 0x%x has too many recursively imported "
8836 "declarations"), d
->offset
.sect_off
);
8843 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
8845 type
= get_die_type_at_offset (offset
, cu
->per_cu
);
8846 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
8848 /* This declaration is a global namespace alias. Add
8849 a symbol for it whose type is the aliased namespace. */
8850 new_symbol (die
, type
, cu
);
8859 /* Return the using directives repository (global or local?) to use in the
8860 current context for LANGUAGE.
8862 For Ada, imported declarations can materialize renamings, which *may* be
8863 global. However it is impossible (for now?) in DWARF to distinguish
8864 "external" imported declarations and "static" ones. As all imported
8865 declarations seem to be static in all other languages, make them all CU-wide
8866 global only in Ada. */
8868 static struct using_direct
**
8869 using_directives (enum language language
)
8871 if (language
== language_ada
&& context_stack_depth
== 0)
8872 return &global_using_directives
;
8874 return &local_using_directives
;
8877 /* Read the import statement specified by the given die and record it. */
8880 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
8882 struct objfile
*objfile
= cu
->objfile
;
8883 struct attribute
*import_attr
;
8884 struct die_info
*imported_die
, *child_die
;
8885 struct dwarf2_cu
*imported_cu
;
8886 const char *imported_name
;
8887 const char *imported_name_prefix
;
8888 const char *canonical_name
;
8889 const char *import_alias
;
8890 const char *imported_declaration
= NULL
;
8891 const char *import_prefix
;
8892 VEC (const_char_ptr
) *excludes
= NULL
;
8893 struct cleanup
*cleanups
;
8895 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8896 if (import_attr
== NULL
)
8898 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
8899 dwarf_tag_name (die
->tag
));
8904 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
8905 imported_name
= dwarf2_name (imported_die
, imported_cu
);
8906 if (imported_name
== NULL
)
8908 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
8910 The import in the following code:
8924 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
8925 <52> DW_AT_decl_file : 1
8926 <53> DW_AT_decl_line : 6
8927 <54> DW_AT_import : <0x75>
8928 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
8930 <5b> DW_AT_decl_file : 1
8931 <5c> DW_AT_decl_line : 2
8932 <5d> DW_AT_type : <0x6e>
8934 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
8935 <76> DW_AT_byte_size : 4
8936 <77> DW_AT_encoding : 5 (signed)
8938 imports the wrong die ( 0x75 instead of 0x58 ).
8939 This case will be ignored until the gcc bug is fixed. */
8943 /* Figure out the local name after import. */
8944 import_alias
= dwarf2_name (die
, cu
);
8946 /* Figure out where the statement is being imported to. */
8947 import_prefix
= determine_prefix (die
, cu
);
8949 /* Figure out what the scope of the imported die is and prepend it
8950 to the name of the imported die. */
8951 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
8953 if (imported_die
->tag
!= DW_TAG_namespace
8954 && imported_die
->tag
!= DW_TAG_module
)
8956 imported_declaration
= imported_name
;
8957 canonical_name
= imported_name_prefix
;
8959 else if (strlen (imported_name_prefix
) > 0)
8960 canonical_name
= obconcat (&objfile
->objfile_obstack
,
8961 imported_name_prefix
,
8962 (cu
->language
== language_d
? "." : "::"),
8963 imported_name
, (char *) NULL
);
8965 canonical_name
= imported_name
;
8967 cleanups
= make_cleanup (VEC_cleanup (const_char_ptr
), &excludes
);
8969 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
8970 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
8971 child_die
= sibling_die (child_die
))
8973 /* DWARF-4: A Fortran use statement with a “rename list” may be
8974 represented by an imported module entry with an import attribute
8975 referring to the module and owned entries corresponding to those
8976 entities that are renamed as part of being imported. */
8978 if (child_die
->tag
!= DW_TAG_imported_declaration
)
8980 complaint (&symfile_complaints
,
8981 _("child DW_TAG_imported_declaration expected "
8982 "- DIE at 0x%x [in module %s]"),
8983 child_die
->offset
.sect_off
, objfile_name (objfile
));
8987 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
8988 if (import_attr
== NULL
)
8990 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
8991 dwarf_tag_name (child_die
->tag
));
8996 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
8998 imported_name
= dwarf2_name (imported_die
, imported_cu
);
8999 if (imported_name
== NULL
)
9001 complaint (&symfile_complaints
,
9002 _("child DW_TAG_imported_declaration has unknown "
9003 "imported name - DIE at 0x%x [in module %s]"),
9004 child_die
->offset
.sect_off
, objfile_name (objfile
));
9008 VEC_safe_push (const_char_ptr
, excludes
, imported_name
);
9010 process_die (child_die
, cu
);
9013 add_using_directive (using_directives (cu
->language
),
9017 imported_declaration
,
9020 &objfile
->objfile_obstack
);
9022 do_cleanups (cleanups
);
9025 /* Cleanup function for handle_DW_AT_stmt_list. */
9028 free_cu_line_header (void *arg
)
9030 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) arg
;
9032 free_line_header (cu
->line_header
);
9033 cu
->line_header
= NULL
;
9036 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
9037 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
9038 this, it was first present in GCC release 4.3.0. */
9041 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
9043 if (!cu
->checked_producer
)
9044 check_producer (cu
);
9046 return cu
->producer_is_gcc_lt_4_3
;
9050 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
9051 const char **name
, const char **comp_dir
)
9053 /* Find the filename. Do not use dwarf2_name here, since the filename
9054 is not a source language identifier. */
9055 *name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
9056 *comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
9058 if (*comp_dir
== NULL
9059 && producer_is_gcc_lt_4_3 (cu
) && *name
!= NULL
9060 && IS_ABSOLUTE_PATH (*name
))
9062 char *d
= ldirname (*name
);
9066 make_cleanup (xfree
, d
);
9068 if (*comp_dir
!= NULL
)
9070 /* Irix 6.2 native cc prepends <machine>.: to the compilation
9071 directory, get rid of it. */
9072 const char *cp
= strchr (*comp_dir
, ':');
9074 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
9079 *name
= "<unknown>";
9082 /* Handle DW_AT_stmt_list for a compilation unit.
9083 DIE is the DW_TAG_compile_unit die for CU.
9084 COMP_DIR is the compilation directory. LOWPC is passed to
9085 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
9088 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
9089 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
9091 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9092 struct attribute
*attr
;
9093 unsigned int line_offset
;
9094 struct line_header line_header_local
;
9095 hashval_t line_header_local_hash
;
9100 gdb_assert (! cu
->per_cu
->is_debug_types
);
9102 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9106 line_offset
= DW_UNSND (attr
);
9108 /* The line header hash table is only created if needed (it exists to
9109 prevent redundant reading of the line table for partial_units).
9110 If we're given a partial_unit, we'll need it. If we're given a
9111 compile_unit, then use the line header hash table if it's already
9112 created, but don't create one just yet. */
9114 if (dwarf2_per_objfile
->line_header_hash
== NULL
9115 && die
->tag
== DW_TAG_partial_unit
)
9117 dwarf2_per_objfile
->line_header_hash
9118 = htab_create_alloc_ex (127, line_header_hash_voidp
,
9119 line_header_eq_voidp
,
9120 free_line_header_voidp
,
9121 &objfile
->objfile_obstack
,
9122 hashtab_obstack_allocate
,
9123 dummy_obstack_deallocate
);
9126 line_header_local
.offset
.sect_off
= line_offset
;
9127 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
9128 line_header_local_hash
= line_header_hash (&line_header_local
);
9129 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
9131 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
9133 line_header_local_hash
, NO_INSERT
);
9135 /* For DW_TAG_compile_unit we need info like symtab::linetable which
9136 is not present in *SLOT (since if there is something in *SLOT then
9137 it will be for a partial_unit). */
9138 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
9140 gdb_assert (*slot
!= NULL
);
9141 cu
->line_header
= (struct line_header
*) *slot
;
9146 /* dwarf_decode_line_header does not yet provide sufficient information.
9147 We always have to call also dwarf_decode_lines for it. */
9148 cu
->line_header
= dwarf_decode_line_header (line_offset
, cu
);
9149 if (cu
->line_header
== NULL
)
9152 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
9156 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
9158 line_header_local_hash
, INSERT
);
9159 gdb_assert (slot
!= NULL
);
9161 if (slot
!= NULL
&& *slot
== NULL
)
9163 /* This newly decoded line number information unit will be owned
9164 by line_header_hash hash table. */
9165 *slot
= cu
->line_header
;
9169 /* We cannot free any current entry in (*slot) as that struct line_header
9170 may be already used by multiple CUs. Create only temporary decoded
9171 line_header for this CU - it may happen at most once for each line
9172 number information unit. And if we're not using line_header_hash
9173 then this is what we want as well. */
9174 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
9175 make_cleanup (free_cu_line_header
, cu
);
9177 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
9178 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
9182 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
9185 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9187 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9188 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9189 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
9190 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
9191 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
9192 struct attribute
*attr
;
9193 const char *name
= NULL
;
9194 const char *comp_dir
= NULL
;
9195 struct die_info
*child_die
;
9198 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9200 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
9202 /* If we didn't find a lowpc, set it to highpc to avoid complaints
9203 from finish_block. */
9204 if (lowpc
== ((CORE_ADDR
) -1))
9206 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
9208 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
9210 prepare_one_comp_unit (cu
, die
, cu
->language
);
9212 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
9213 standardised yet. As a workaround for the language detection we fall
9214 back to the DW_AT_producer string. */
9215 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
9216 cu
->language
= language_opencl
;
9218 /* Similar hack for Go. */
9219 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
9220 set_cu_language (DW_LANG_Go
, cu
);
9222 dwarf2_start_symtab (cu
, name
, comp_dir
, lowpc
);
9224 /* Decode line number information if present. We do this before
9225 processing child DIEs, so that the line header table is available
9226 for DW_AT_decl_file. */
9227 handle_DW_AT_stmt_list (die
, cu
, comp_dir
, lowpc
);
9229 /* Process all dies in compilation unit. */
9230 if (die
->child
!= NULL
)
9232 child_die
= die
->child
;
9233 while (child_die
&& child_die
->tag
)
9235 process_die (child_die
, cu
);
9236 child_die
= sibling_die (child_die
);
9240 /* Decode macro information, if present. Dwarf 2 macro information
9241 refers to information in the line number info statement program
9242 header, so we can only read it if we've read the header
9244 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
9245 if (attr
&& cu
->line_header
)
9247 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
9248 complaint (&symfile_complaints
,
9249 _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
9251 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
9255 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
9256 if (attr
&& cu
->line_header
)
9258 unsigned int macro_offset
= DW_UNSND (attr
);
9260 dwarf_decode_macros (cu
, macro_offset
, 0);
9264 do_cleanups (back_to
);
9267 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
9268 Create the set of symtabs used by this TU, or if this TU is sharing
9269 symtabs with another TU and the symtabs have already been created
9270 then restore those symtabs in the line header.
9271 We don't need the pc/line-number mapping for type units. */
9274 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
9276 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
9277 struct type_unit_group
*tu_group
;
9279 struct line_header
*lh
;
9280 struct attribute
*attr
;
9281 unsigned int i
, line_offset
;
9282 struct signatured_type
*sig_type
;
9284 gdb_assert (per_cu
->is_debug_types
);
9285 sig_type
= (struct signatured_type
*) per_cu
;
9287 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9289 /* If we're using .gdb_index (includes -readnow) then
9290 per_cu->type_unit_group may not have been set up yet. */
9291 if (sig_type
->type_unit_group
== NULL
)
9292 sig_type
->type_unit_group
= get_type_unit_group (cu
, attr
);
9293 tu_group
= sig_type
->type_unit_group
;
9295 /* If we've already processed this stmt_list there's no real need to
9296 do it again, we could fake it and just recreate the part we need
9297 (file name,index -> symtab mapping). If data shows this optimization
9298 is useful we can do it then. */
9299 first_time
= tu_group
->compunit_symtab
== NULL
;
9301 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
9306 line_offset
= DW_UNSND (attr
);
9307 lh
= dwarf_decode_line_header (line_offset
, cu
);
9312 dwarf2_start_symtab (cu
, "", NULL
, 0);
9315 gdb_assert (tu_group
->symtabs
== NULL
);
9316 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9321 cu
->line_header
= lh
;
9322 make_cleanup (free_cu_line_header
, cu
);
9326 struct compunit_symtab
*cust
= dwarf2_start_symtab (cu
, "", NULL
, 0);
9328 /* Note: We don't assign tu_group->compunit_symtab yet because we're
9329 still initializing it, and our caller (a few levels up)
9330 process_full_type_unit still needs to know if this is the first
9333 tu_group
->num_symtabs
= lh
->num_file_names
;
9334 tu_group
->symtabs
= XNEWVEC (struct symtab
*, lh
->num_file_names
);
9336 for (i
= 0; i
< lh
->num_file_names
; ++i
)
9338 const char *dir
= NULL
;
9339 struct file_entry
*fe
= &lh
->file_names
[i
];
9341 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
9342 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
9343 dwarf2_start_subfile (fe
->name
, dir
);
9345 if (current_subfile
->symtab
== NULL
)
9347 /* NOTE: start_subfile will recognize when it's been passed
9348 a file it has already seen. So we can't assume there's a
9349 simple mapping from lh->file_names to subfiles, plus
9350 lh->file_names may contain dups. */
9351 current_subfile
->symtab
9352 = allocate_symtab (cust
, current_subfile
->name
);
9355 fe
->symtab
= current_subfile
->symtab
;
9356 tu_group
->symtabs
[i
] = fe
->symtab
;
9361 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9363 for (i
= 0; i
< lh
->num_file_names
; ++i
)
9365 struct file_entry
*fe
= &lh
->file_names
[i
];
9367 fe
->symtab
= tu_group
->symtabs
[i
];
9371 /* The main symtab is allocated last. Type units don't have DW_AT_name
9372 so they don't have a "real" (so to speak) symtab anyway.
9373 There is later code that will assign the main symtab to all symbols
9374 that don't have one. We need to handle the case of a symbol with a
9375 missing symtab (DW_AT_decl_file) anyway. */
9378 /* Process DW_TAG_type_unit.
9379 For TUs we want to skip the first top level sibling if it's not the
9380 actual type being defined by this TU. In this case the first top
9381 level sibling is there to provide context only. */
9384 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9386 struct die_info
*child_die
;
9388 prepare_one_comp_unit (cu
, die
, language_minimal
);
9390 /* Initialize (or reinitialize) the machinery for building symtabs.
9391 We do this before processing child DIEs, so that the line header table
9392 is available for DW_AT_decl_file. */
9393 setup_type_unit_groups (die
, cu
);
9395 if (die
->child
!= NULL
)
9397 child_die
= die
->child
;
9398 while (child_die
&& child_die
->tag
)
9400 process_die (child_die
, cu
);
9401 child_die
= sibling_die (child_die
);
9408 http://gcc.gnu.org/wiki/DebugFission
9409 http://gcc.gnu.org/wiki/DebugFissionDWP
9411 To simplify handling of both DWO files ("object" files with the DWARF info)
9412 and DWP files (a file with the DWOs packaged up into one file), we treat
9413 DWP files as having a collection of virtual DWO files. */
9416 hash_dwo_file (const void *item
)
9418 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
9421 hash
= htab_hash_string (dwo_file
->dwo_name
);
9422 if (dwo_file
->comp_dir
!= NULL
)
9423 hash
+= htab_hash_string (dwo_file
->comp_dir
);
9428 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
9430 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
9431 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
9433 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
9435 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
9436 return lhs
->comp_dir
== rhs
->comp_dir
;
9437 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
9440 /* Allocate a hash table for DWO files. */
9443 allocate_dwo_file_hash_table (void)
9445 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9447 return htab_create_alloc_ex (41,
9451 &objfile
->objfile_obstack
,
9452 hashtab_obstack_allocate
,
9453 dummy_obstack_deallocate
);
9456 /* Lookup DWO file DWO_NAME. */
9459 lookup_dwo_file_slot (const char *dwo_name
, const char *comp_dir
)
9461 struct dwo_file find_entry
;
9464 if (dwarf2_per_objfile
->dwo_files
== NULL
)
9465 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
9467 memset (&find_entry
, 0, sizeof (find_entry
));
9468 find_entry
.dwo_name
= dwo_name
;
9469 find_entry
.comp_dir
= comp_dir
;
9470 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
9476 hash_dwo_unit (const void *item
)
9478 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
9480 /* This drops the top 32 bits of the id, but is ok for a hash. */
9481 return dwo_unit
->signature
;
9485 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
9487 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
9488 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
9490 /* The signature is assumed to be unique within the DWO file.
9491 So while object file CU dwo_id's always have the value zero,
9492 that's OK, assuming each object file DWO file has only one CU,
9493 and that's the rule for now. */
9494 return lhs
->signature
== rhs
->signature
;
9497 /* Allocate a hash table for DWO CUs,TUs.
9498 There is one of these tables for each of CUs,TUs for each DWO file. */
9501 allocate_dwo_unit_table (struct objfile
*objfile
)
9503 /* Start out with a pretty small number.
9504 Generally DWO files contain only one CU and maybe some TUs. */
9505 return htab_create_alloc_ex (3,
9509 &objfile
->objfile_obstack
,
9510 hashtab_obstack_allocate
,
9511 dummy_obstack_deallocate
);
9514 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
9516 struct create_dwo_cu_data
9518 struct dwo_file
*dwo_file
;
9519 struct dwo_unit dwo_unit
;
9522 /* die_reader_func for create_dwo_cu. */
9525 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
9526 const gdb_byte
*info_ptr
,
9527 struct die_info
*comp_unit_die
,
9531 struct dwarf2_cu
*cu
= reader
->cu
;
9532 sect_offset offset
= cu
->per_cu
->offset
;
9533 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
9534 struct create_dwo_cu_data
*data
= (struct create_dwo_cu_data
*) datap
;
9535 struct dwo_file
*dwo_file
= data
->dwo_file
;
9536 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
9537 struct attribute
*attr
;
9539 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
9542 complaint (&symfile_complaints
,
9543 _("Dwarf Error: debug entry at offset 0x%x is missing"
9544 " its dwo_id [in module %s]"),
9545 offset
.sect_off
, dwo_file
->dwo_name
);
9549 dwo_unit
->dwo_file
= dwo_file
;
9550 dwo_unit
->signature
= DW_UNSND (attr
);
9551 dwo_unit
->section
= section
;
9552 dwo_unit
->offset
= offset
;
9553 dwo_unit
->length
= cu
->per_cu
->length
;
9555 if (dwarf_read_debug
)
9556 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, dwo_id %s\n",
9557 offset
.sect_off
, hex_string (dwo_unit
->signature
));
9560 /* Create the dwo_unit for the lone CU in DWO_FILE.
9561 Note: This function processes DWO files only, not DWP files. */
9563 static struct dwo_unit
*
9564 create_dwo_cu (struct dwo_file
*dwo_file
)
9566 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9567 struct dwarf2_section_info
*section
= &dwo_file
->sections
.info
;
9568 const gdb_byte
*info_ptr
, *end_ptr
;
9569 struct create_dwo_cu_data create_dwo_cu_data
;
9570 struct dwo_unit
*dwo_unit
;
9572 dwarf2_read_section (objfile
, section
);
9573 info_ptr
= section
->buffer
;
9575 if (info_ptr
== NULL
)
9578 if (dwarf_read_debug
)
9580 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
9581 get_section_name (section
),
9582 get_section_file_name (section
));
9585 create_dwo_cu_data
.dwo_file
= dwo_file
;
9588 end_ptr
= info_ptr
+ section
->size
;
9589 while (info_ptr
< end_ptr
)
9591 struct dwarf2_per_cu_data per_cu
;
9593 memset (&create_dwo_cu_data
.dwo_unit
, 0,
9594 sizeof (create_dwo_cu_data
.dwo_unit
));
9595 memset (&per_cu
, 0, sizeof (per_cu
));
9596 per_cu
.objfile
= objfile
;
9597 per_cu
.is_debug_types
= 0;
9598 per_cu
.offset
.sect_off
= info_ptr
- section
->buffer
;
9599 per_cu
.section
= section
;
9601 init_cutu_and_read_dies_no_follow (&per_cu
, dwo_file
,
9602 create_dwo_cu_reader
,
9603 &create_dwo_cu_data
);
9605 if (create_dwo_cu_data
.dwo_unit
.dwo_file
!= NULL
)
9607 /* If we've already found one, complain. We only support one
9608 because having more than one requires hacking the dwo_name of
9609 each to match, which is highly unlikely to happen. */
9610 if (dwo_unit
!= NULL
)
9612 complaint (&symfile_complaints
,
9613 _("Multiple CUs in DWO file %s [in module %s]"),
9614 dwo_file
->dwo_name
, objfile_name (objfile
));
9618 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
9619 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
9622 info_ptr
+= per_cu
.length
;
9628 /* DWP file .debug_{cu,tu}_index section format:
9629 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
9633 Both index sections have the same format, and serve to map a 64-bit
9634 signature to a set of section numbers. Each section begins with a header,
9635 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
9636 indexes, and a pool of 32-bit section numbers. The index sections will be
9637 aligned at 8-byte boundaries in the file.
9639 The index section header consists of:
9641 V, 32 bit version number
9643 N, 32 bit number of compilation units or type units in the index
9644 M, 32 bit number of slots in the hash table
9646 Numbers are recorded using the byte order of the application binary.
9648 The hash table begins at offset 16 in the section, and consists of an array
9649 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
9650 order of the application binary). Unused slots in the hash table are 0.
9651 (We rely on the extreme unlikeliness of a signature being exactly 0.)
9653 The parallel table begins immediately after the hash table
9654 (at offset 16 + 8 * M from the beginning of the section), and consists of an
9655 array of 32-bit indexes (using the byte order of the application binary),
9656 corresponding 1-1 with slots in the hash table. Each entry in the parallel
9657 table contains a 32-bit index into the pool of section numbers. For unused
9658 hash table slots, the corresponding entry in the parallel table will be 0.
9660 The pool of section numbers begins immediately following the hash table
9661 (at offset 16 + 12 * M from the beginning of the section). The pool of
9662 section numbers consists of an array of 32-bit words (using the byte order
9663 of the application binary). Each item in the array is indexed starting
9664 from 0. The hash table entry provides the index of the first section
9665 number in the set. Additional section numbers in the set follow, and the
9666 set is terminated by a 0 entry (section number 0 is not used in ELF).
9668 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
9669 section must be the first entry in the set, and the .debug_abbrev.dwo must
9670 be the second entry. Other members of the set may follow in any order.
9676 DWP Version 2 combines all the .debug_info, etc. sections into one,
9677 and the entries in the index tables are now offsets into these sections.
9678 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
9681 Index Section Contents:
9683 Hash Table of Signatures dwp_hash_table.hash_table
9684 Parallel Table of Indices dwp_hash_table.unit_table
9685 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
9686 Table of Section Sizes dwp_hash_table.v2.sizes
9688 The index section header consists of:
9690 V, 32 bit version number
9691 L, 32 bit number of columns in the table of section offsets
9692 N, 32 bit number of compilation units or type units in the index
9693 M, 32 bit number of slots in the hash table
9695 Numbers are recorded using the byte order of the application binary.
9697 The hash table has the same format as version 1.
9698 The parallel table of indices has the same format as version 1,
9699 except that the entries are origin-1 indices into the table of sections
9700 offsets and the table of section sizes.
9702 The table of offsets begins immediately following the parallel table
9703 (at offset 16 + 12 * M from the beginning of the section). The table is
9704 a two-dimensional array of 32-bit words (using the byte order of the
9705 application binary), with L columns and N+1 rows, in row-major order.
9706 Each row in the array is indexed starting from 0. The first row provides
9707 a key to the remaining rows: each column in this row provides an identifier
9708 for a debug section, and the offsets in the same column of subsequent rows
9709 refer to that section. The section identifiers are:
9711 DW_SECT_INFO 1 .debug_info.dwo
9712 DW_SECT_TYPES 2 .debug_types.dwo
9713 DW_SECT_ABBREV 3 .debug_abbrev.dwo
9714 DW_SECT_LINE 4 .debug_line.dwo
9715 DW_SECT_LOC 5 .debug_loc.dwo
9716 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
9717 DW_SECT_MACINFO 7 .debug_macinfo.dwo
9718 DW_SECT_MACRO 8 .debug_macro.dwo
9720 The offsets provided by the CU and TU index sections are the base offsets
9721 for the contributions made by each CU or TU to the corresponding section
9722 in the package file. Each CU and TU header contains an abbrev_offset
9723 field, used to find the abbreviations table for that CU or TU within the
9724 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
9725 be interpreted as relative to the base offset given in the index section.
9726 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
9727 should be interpreted as relative to the base offset for .debug_line.dwo,
9728 and offsets into other debug sections obtained from DWARF attributes should
9729 also be interpreted as relative to the corresponding base offset.
9731 The table of sizes begins immediately following the table of offsets.
9732 Like the table of offsets, it is a two-dimensional array of 32-bit words,
9733 with L columns and N rows, in row-major order. Each row in the array is
9734 indexed starting from 1 (row 0 is shared by the two tables).
9738 Hash table lookup is handled the same in version 1 and 2:
9740 We assume that N and M will not exceed 2^32 - 1.
9741 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
9743 Given a 64-bit compilation unit signature or a type signature S, an entry
9744 in the hash table is located as follows:
9746 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
9747 the low-order k bits all set to 1.
9749 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
9751 3) If the hash table entry at index H matches the signature, use that
9752 entry. If the hash table entry at index H is unused (all zeroes),
9753 terminate the search: the signature is not present in the table.
9755 4) Let H = (H + H') modulo M. Repeat at Step 3.
9757 Because M > N and H' and M are relatively prime, the search is guaranteed
9758 to stop at an unused slot or find the match. */
9760 /* Create a hash table to map DWO IDs to their CU/TU entry in
9761 .debug_{info,types}.dwo in DWP_FILE.
9762 Returns NULL if there isn't one.
9763 Note: This function processes DWP files only, not DWO files. */
9765 static struct dwp_hash_table
*
9766 create_dwp_hash_table (struct dwp_file
*dwp_file
, int is_debug_types
)
9768 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9769 bfd
*dbfd
= dwp_file
->dbfd
;
9770 const gdb_byte
*index_ptr
, *index_end
;
9771 struct dwarf2_section_info
*index
;
9772 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
9773 struct dwp_hash_table
*htab
;
9776 index
= &dwp_file
->sections
.tu_index
;
9778 index
= &dwp_file
->sections
.cu_index
;
9780 if (dwarf2_section_empty_p (index
))
9782 dwarf2_read_section (objfile
, index
);
9784 index_ptr
= index
->buffer
;
9785 index_end
= index_ptr
+ index
->size
;
9787 version
= read_4_bytes (dbfd
, index_ptr
);
9790 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
9794 nr_units
= read_4_bytes (dbfd
, index_ptr
);
9796 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
9799 if (version
!= 1 && version
!= 2)
9801 error (_("Dwarf Error: unsupported DWP file version (%s)"
9803 pulongest (version
), dwp_file
->name
);
9805 if (nr_slots
!= (nr_slots
& -nr_slots
))
9807 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
9808 " is not power of 2 [in module %s]"),
9809 pulongest (nr_slots
), dwp_file
->name
);
9812 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
9813 htab
->version
= version
;
9814 htab
->nr_columns
= nr_columns
;
9815 htab
->nr_units
= nr_units
;
9816 htab
->nr_slots
= nr_slots
;
9817 htab
->hash_table
= index_ptr
;
9818 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
9820 /* Exit early if the table is empty. */
9821 if (nr_slots
== 0 || nr_units
== 0
9822 || (version
== 2 && nr_columns
== 0))
9824 /* All must be zero. */
9825 if (nr_slots
!= 0 || nr_units
!= 0
9826 || (version
== 2 && nr_columns
!= 0))
9828 complaint (&symfile_complaints
,
9829 _("Empty DWP but nr_slots,nr_units,nr_columns not"
9830 " all zero [in modules %s]"),
9838 htab
->section_pool
.v1
.indices
=
9839 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
9840 /* It's harder to decide whether the section is too small in v1.
9841 V1 is deprecated anyway so we punt. */
9845 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
9846 int *ids
= htab
->section_pool
.v2
.section_ids
;
9847 /* Reverse map for error checking. */
9848 int ids_seen
[DW_SECT_MAX
+ 1];
9853 error (_("Dwarf Error: bad DWP hash table, too few columns"
9854 " in section table [in module %s]"),
9857 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
9859 error (_("Dwarf Error: bad DWP hash table, too many columns"
9860 " in section table [in module %s]"),
9863 memset (ids
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
9864 memset (ids_seen
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
9865 for (i
= 0; i
< nr_columns
; ++i
)
9867 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
9869 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
9871 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
9872 " in section table [in module %s]"),
9873 id
, dwp_file
->name
);
9875 if (ids_seen
[id
] != -1)
9877 error (_("Dwarf Error: bad DWP hash table, duplicate section"
9878 " id %d in section table [in module %s]"),
9879 id
, dwp_file
->name
);
9884 /* Must have exactly one info or types section. */
9885 if (((ids_seen
[DW_SECT_INFO
] != -1)
9886 + (ids_seen
[DW_SECT_TYPES
] != -1))
9889 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
9890 " DWO info/types section [in module %s]"),
9893 /* Must have an abbrev section. */
9894 if (ids_seen
[DW_SECT_ABBREV
] == -1)
9896 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
9897 " section [in module %s]"),
9900 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
9901 htab
->section_pool
.v2
.sizes
=
9902 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
9903 * nr_units
* nr_columns
);
9904 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
9905 * nr_units
* nr_columns
))
9908 error (_("Dwarf Error: DWP index section is corrupt (too small)"
9917 /* Update SECTIONS with the data from SECTP.
9919 This function is like the other "locate" section routines that are
9920 passed to bfd_map_over_sections, but in this context the sections to
9921 read comes from the DWP V1 hash table, not the full ELF section table.
9923 The result is non-zero for success, or zero if an error was found. */
9926 locate_v1_virtual_dwo_sections (asection
*sectp
,
9927 struct virtual_v1_dwo_sections
*sections
)
9929 const struct dwop_section_names
*names
= &dwop_section_names
;
9931 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
9933 /* There can be only one. */
9934 if (sections
->abbrev
.s
.section
!= NULL
)
9936 sections
->abbrev
.s
.section
= sectp
;
9937 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
9939 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
9940 || section_is_p (sectp
->name
, &names
->types_dwo
))
9942 /* There can be only one. */
9943 if (sections
->info_or_types
.s
.section
!= NULL
)
9945 sections
->info_or_types
.s
.section
= sectp
;
9946 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
9948 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
9950 /* There can be only one. */
9951 if (sections
->line
.s
.section
!= NULL
)
9953 sections
->line
.s
.section
= sectp
;
9954 sections
->line
.size
= bfd_get_section_size (sectp
);
9956 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
9958 /* There can be only one. */
9959 if (sections
->loc
.s
.section
!= NULL
)
9961 sections
->loc
.s
.section
= sectp
;
9962 sections
->loc
.size
= bfd_get_section_size (sectp
);
9964 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
9966 /* There can be only one. */
9967 if (sections
->macinfo
.s
.section
!= NULL
)
9969 sections
->macinfo
.s
.section
= sectp
;
9970 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
9972 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
9974 /* There can be only one. */
9975 if (sections
->macro
.s
.section
!= NULL
)
9977 sections
->macro
.s
.section
= sectp
;
9978 sections
->macro
.size
= bfd_get_section_size (sectp
);
9980 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
9982 /* There can be only one. */
9983 if (sections
->str_offsets
.s
.section
!= NULL
)
9985 sections
->str_offsets
.s
.section
= sectp
;
9986 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
9990 /* No other kind of section is valid. */
9997 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
9998 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
9999 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
10000 This is for DWP version 1 files. */
10002 static struct dwo_unit
*
10003 create_dwo_unit_in_dwp_v1 (struct dwp_file
*dwp_file
,
10004 uint32_t unit_index
,
10005 const char *comp_dir
,
10006 ULONGEST signature
, int is_debug_types
)
10008 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10009 const struct dwp_hash_table
*dwp_htab
=
10010 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10011 bfd
*dbfd
= dwp_file
->dbfd
;
10012 const char *kind
= is_debug_types
? "TU" : "CU";
10013 struct dwo_file
*dwo_file
;
10014 struct dwo_unit
*dwo_unit
;
10015 struct virtual_v1_dwo_sections sections
;
10016 void **dwo_file_slot
;
10017 char *virtual_dwo_name
;
10018 struct cleanup
*cleanups
;
10021 gdb_assert (dwp_file
->version
== 1);
10023 if (dwarf_read_debug
)
10025 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
10027 pulongest (unit_index
), hex_string (signature
),
10031 /* Fetch the sections of this DWO unit.
10032 Put a limit on the number of sections we look for so that bad data
10033 doesn't cause us to loop forever. */
10035 #define MAX_NR_V1_DWO_SECTIONS \
10036 (1 /* .debug_info or .debug_types */ \
10037 + 1 /* .debug_abbrev */ \
10038 + 1 /* .debug_line */ \
10039 + 1 /* .debug_loc */ \
10040 + 1 /* .debug_str_offsets */ \
10041 + 1 /* .debug_macro or .debug_macinfo */ \
10042 + 1 /* trailing zero */)
10044 memset (§ions
, 0, sizeof (sections
));
10045 cleanups
= make_cleanup (null_cleanup
, 0);
10047 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
10050 uint32_t section_nr
=
10051 read_4_bytes (dbfd
,
10052 dwp_htab
->section_pool
.v1
.indices
10053 + (unit_index
+ i
) * sizeof (uint32_t));
10055 if (section_nr
== 0)
10057 if (section_nr
>= dwp_file
->num_sections
)
10059 error (_("Dwarf Error: bad DWP hash table, section number too large"
10060 " [in module %s]"),
10064 sectp
= dwp_file
->elf_sections
[section_nr
];
10065 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
10067 error (_("Dwarf Error: bad DWP hash table, invalid section found"
10068 " [in module %s]"),
10074 || dwarf2_section_empty_p (§ions
.info_or_types
)
10075 || dwarf2_section_empty_p (§ions
.abbrev
))
10077 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
10078 " [in module %s]"),
10081 if (i
== MAX_NR_V1_DWO_SECTIONS
)
10083 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
10084 " [in module %s]"),
10088 /* It's easier for the rest of the code if we fake a struct dwo_file and
10089 have dwo_unit "live" in that. At least for now.
10091 The DWP file can be made up of a random collection of CUs and TUs.
10092 However, for each CU + set of TUs that came from the same original DWO
10093 file, we can combine them back into a virtual DWO file to save space
10094 (fewer struct dwo_file objects to allocate). Remember that for really
10095 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10098 xstrprintf ("virtual-dwo/%d-%d-%d-%d",
10099 get_section_id (§ions
.abbrev
),
10100 get_section_id (§ions
.line
),
10101 get_section_id (§ions
.loc
),
10102 get_section_id (§ions
.str_offsets
));
10103 make_cleanup (xfree
, virtual_dwo_name
);
10104 /* Can we use an existing virtual DWO file? */
10105 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
10106 /* Create one if necessary. */
10107 if (*dwo_file_slot
== NULL
)
10109 if (dwarf_read_debug
)
10111 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
10114 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10116 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
10118 strlen (virtual_dwo_name
));
10119 dwo_file
->comp_dir
= comp_dir
;
10120 dwo_file
->sections
.abbrev
= sections
.abbrev
;
10121 dwo_file
->sections
.line
= sections
.line
;
10122 dwo_file
->sections
.loc
= sections
.loc
;
10123 dwo_file
->sections
.macinfo
= sections
.macinfo
;
10124 dwo_file
->sections
.macro
= sections
.macro
;
10125 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
10126 /* The "str" section is global to the entire DWP file. */
10127 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10128 /* The info or types section is assigned below to dwo_unit,
10129 there's no need to record it in dwo_file.
10130 Also, we can't simply record type sections in dwo_file because
10131 we record a pointer into the vector in dwo_unit. As we collect more
10132 types we'll grow the vector and eventually have to reallocate space
10133 for it, invalidating all copies of pointers into the previous
10135 *dwo_file_slot
= dwo_file
;
10139 if (dwarf_read_debug
)
10141 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10144 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
10146 do_cleanups (cleanups
);
10148 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10149 dwo_unit
->dwo_file
= dwo_file
;
10150 dwo_unit
->signature
= signature
;
10151 dwo_unit
->section
=
10152 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
10153 *dwo_unit
->section
= sections
.info_or_types
;
10154 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10159 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
10160 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
10161 piece within that section used by a TU/CU, return a virtual section
10162 of just that piece. */
10164 static struct dwarf2_section_info
10165 create_dwp_v2_section (struct dwarf2_section_info
*section
,
10166 bfd_size_type offset
, bfd_size_type size
)
10168 struct dwarf2_section_info result
;
10171 gdb_assert (section
!= NULL
);
10172 gdb_assert (!section
->is_virtual
);
10174 memset (&result
, 0, sizeof (result
));
10175 result
.s
.containing_section
= section
;
10176 result
.is_virtual
= 1;
10181 sectp
= get_section_bfd_section (section
);
10183 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
10184 bounds of the real section. This is a pretty-rare event, so just
10185 flag an error (easier) instead of a warning and trying to cope. */
10187 || offset
+ size
> bfd_get_section_size (sectp
))
10189 bfd
*abfd
= sectp
->owner
;
10191 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
10192 " in section %s [in module %s]"),
10193 sectp
? bfd_section_name (abfd
, sectp
) : "<unknown>",
10194 objfile_name (dwarf2_per_objfile
->objfile
));
10197 result
.virtual_offset
= offset
;
10198 result
.size
= size
;
10202 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
10203 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
10204 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
10205 This is for DWP version 2 files. */
10207 static struct dwo_unit
*
10208 create_dwo_unit_in_dwp_v2 (struct dwp_file
*dwp_file
,
10209 uint32_t unit_index
,
10210 const char *comp_dir
,
10211 ULONGEST signature
, int is_debug_types
)
10213 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10214 const struct dwp_hash_table
*dwp_htab
=
10215 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10216 bfd
*dbfd
= dwp_file
->dbfd
;
10217 const char *kind
= is_debug_types
? "TU" : "CU";
10218 struct dwo_file
*dwo_file
;
10219 struct dwo_unit
*dwo_unit
;
10220 struct virtual_v2_dwo_sections sections
;
10221 void **dwo_file_slot
;
10222 char *virtual_dwo_name
;
10223 struct cleanup
*cleanups
;
10226 gdb_assert (dwp_file
->version
== 2);
10228 if (dwarf_read_debug
)
10230 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
10232 pulongest (unit_index
), hex_string (signature
),
10236 /* Fetch the section offsets of this DWO unit. */
10238 memset (§ions
, 0, sizeof (sections
));
10239 cleanups
= make_cleanup (null_cleanup
, 0);
10241 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
10243 uint32_t offset
= read_4_bytes (dbfd
,
10244 dwp_htab
->section_pool
.v2
.offsets
10245 + (((unit_index
- 1) * dwp_htab
->nr_columns
10247 * sizeof (uint32_t)));
10248 uint32_t size
= read_4_bytes (dbfd
,
10249 dwp_htab
->section_pool
.v2
.sizes
10250 + (((unit_index
- 1) * dwp_htab
->nr_columns
10252 * sizeof (uint32_t)));
10254 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
10257 case DW_SECT_TYPES
:
10258 sections
.info_or_types_offset
= offset
;
10259 sections
.info_or_types_size
= size
;
10261 case DW_SECT_ABBREV
:
10262 sections
.abbrev_offset
= offset
;
10263 sections
.abbrev_size
= size
;
10266 sections
.line_offset
= offset
;
10267 sections
.line_size
= size
;
10270 sections
.loc_offset
= offset
;
10271 sections
.loc_size
= size
;
10273 case DW_SECT_STR_OFFSETS
:
10274 sections
.str_offsets_offset
= offset
;
10275 sections
.str_offsets_size
= size
;
10277 case DW_SECT_MACINFO
:
10278 sections
.macinfo_offset
= offset
;
10279 sections
.macinfo_size
= size
;
10281 case DW_SECT_MACRO
:
10282 sections
.macro_offset
= offset
;
10283 sections
.macro_size
= size
;
10288 /* It's easier for the rest of the code if we fake a struct dwo_file and
10289 have dwo_unit "live" in that. At least for now.
10291 The DWP file can be made up of a random collection of CUs and TUs.
10292 However, for each CU + set of TUs that came from the same original DWO
10293 file, we can combine them back into a virtual DWO file to save space
10294 (fewer struct dwo_file objects to allocate). Remember that for really
10295 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10298 xstrprintf ("virtual-dwo/%ld-%ld-%ld-%ld",
10299 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
10300 (long) (sections
.line_size
? sections
.line_offset
: 0),
10301 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
10302 (long) (sections
.str_offsets_size
10303 ? sections
.str_offsets_offset
: 0));
10304 make_cleanup (xfree
, virtual_dwo_name
);
10305 /* Can we use an existing virtual DWO file? */
10306 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
10307 /* Create one if necessary. */
10308 if (*dwo_file_slot
== NULL
)
10310 if (dwarf_read_debug
)
10312 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
10315 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10317 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
10319 strlen (virtual_dwo_name
));
10320 dwo_file
->comp_dir
= comp_dir
;
10321 dwo_file
->sections
.abbrev
=
10322 create_dwp_v2_section (&dwp_file
->sections
.abbrev
,
10323 sections
.abbrev_offset
, sections
.abbrev_size
);
10324 dwo_file
->sections
.line
=
10325 create_dwp_v2_section (&dwp_file
->sections
.line
,
10326 sections
.line_offset
, sections
.line_size
);
10327 dwo_file
->sections
.loc
=
10328 create_dwp_v2_section (&dwp_file
->sections
.loc
,
10329 sections
.loc_offset
, sections
.loc_size
);
10330 dwo_file
->sections
.macinfo
=
10331 create_dwp_v2_section (&dwp_file
->sections
.macinfo
,
10332 sections
.macinfo_offset
, sections
.macinfo_size
);
10333 dwo_file
->sections
.macro
=
10334 create_dwp_v2_section (&dwp_file
->sections
.macro
,
10335 sections
.macro_offset
, sections
.macro_size
);
10336 dwo_file
->sections
.str_offsets
=
10337 create_dwp_v2_section (&dwp_file
->sections
.str_offsets
,
10338 sections
.str_offsets_offset
,
10339 sections
.str_offsets_size
);
10340 /* The "str" section is global to the entire DWP file. */
10341 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10342 /* The info or types section is assigned below to dwo_unit,
10343 there's no need to record it in dwo_file.
10344 Also, we can't simply record type sections in dwo_file because
10345 we record a pointer into the vector in dwo_unit. As we collect more
10346 types we'll grow the vector and eventually have to reallocate space
10347 for it, invalidating all copies of pointers into the previous
10349 *dwo_file_slot
= dwo_file
;
10353 if (dwarf_read_debug
)
10355 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10358 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
10360 do_cleanups (cleanups
);
10362 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10363 dwo_unit
->dwo_file
= dwo_file
;
10364 dwo_unit
->signature
= signature
;
10365 dwo_unit
->section
=
10366 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
10367 *dwo_unit
->section
= create_dwp_v2_section (is_debug_types
10368 ? &dwp_file
->sections
.types
10369 : &dwp_file
->sections
.info
,
10370 sections
.info_or_types_offset
,
10371 sections
.info_or_types_size
);
10372 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10377 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
10378 Returns NULL if the signature isn't found. */
10380 static struct dwo_unit
*
10381 lookup_dwo_unit_in_dwp (struct dwp_file
*dwp_file
, const char *comp_dir
,
10382 ULONGEST signature
, int is_debug_types
)
10384 const struct dwp_hash_table
*dwp_htab
=
10385 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10386 bfd
*dbfd
= dwp_file
->dbfd
;
10387 uint32_t mask
= dwp_htab
->nr_slots
- 1;
10388 uint32_t hash
= signature
& mask
;
10389 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
10392 struct dwo_unit find_dwo_cu
;
10394 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
10395 find_dwo_cu
.signature
= signature
;
10396 slot
= htab_find_slot (is_debug_types
10397 ? dwp_file
->loaded_tus
10398 : dwp_file
->loaded_cus
,
10399 &find_dwo_cu
, INSERT
);
10402 return (struct dwo_unit
*) *slot
;
10404 /* Use a for loop so that we don't loop forever on bad debug info. */
10405 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
10407 ULONGEST signature_in_table
;
10409 signature_in_table
=
10410 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
10411 if (signature_in_table
== signature
)
10413 uint32_t unit_index
=
10414 read_4_bytes (dbfd
,
10415 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
10417 if (dwp_file
->version
== 1)
10419 *slot
= create_dwo_unit_in_dwp_v1 (dwp_file
, unit_index
,
10420 comp_dir
, signature
,
10425 *slot
= create_dwo_unit_in_dwp_v2 (dwp_file
, unit_index
,
10426 comp_dir
, signature
,
10429 return (struct dwo_unit
*) *slot
;
10431 if (signature_in_table
== 0)
10433 hash
= (hash
+ hash2
) & mask
;
10436 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
10437 " [in module %s]"),
10441 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
10442 Open the file specified by FILE_NAME and hand it off to BFD for
10443 preliminary analysis. Return a newly initialized bfd *, which
10444 includes a canonicalized copy of FILE_NAME.
10445 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
10446 SEARCH_CWD is true if the current directory is to be searched.
10447 It will be searched before debug-file-directory.
10448 If successful, the file is added to the bfd include table of the
10449 objfile's bfd (see gdb_bfd_record_inclusion).
10450 If unable to find/open the file, return NULL.
10451 NOTE: This function is derived from symfile_bfd_open. */
10454 try_open_dwop_file (const char *file_name
, int is_dwp
, int search_cwd
)
10458 char *absolute_name
;
10459 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
10460 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
10461 to debug_file_directory. */
10463 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
10467 if (*debug_file_directory
!= '\0')
10468 search_path
= concat (".", dirname_separator_string
,
10469 debug_file_directory
, (char *) NULL
);
10471 search_path
= xstrdup (".");
10474 search_path
= xstrdup (debug_file_directory
);
10476 flags
= OPF_RETURN_REALPATH
;
10478 flags
|= OPF_SEARCH_IN_PATH
;
10479 desc
= openp (search_path
, flags
, file_name
,
10480 O_RDONLY
| O_BINARY
, &absolute_name
);
10481 xfree (search_path
);
10485 sym_bfd
= gdb_bfd_open (absolute_name
, gnutarget
, desc
);
10486 xfree (absolute_name
);
10487 if (sym_bfd
== NULL
)
10489 bfd_set_cacheable (sym_bfd
, 1);
10491 if (!bfd_check_format (sym_bfd
, bfd_object
))
10493 gdb_bfd_unref (sym_bfd
); /* This also closes desc. */
10497 /* Success. Record the bfd as having been included by the objfile's bfd.
10498 This is important because things like demangled_names_hash lives in the
10499 objfile's per_bfd space and may have references to things like symbol
10500 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
10501 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
);
10506 /* Try to open DWO file FILE_NAME.
10507 COMP_DIR is the DW_AT_comp_dir attribute.
10508 The result is the bfd handle of the file.
10509 If there is a problem finding or opening the file, return NULL.
10510 Upon success, the canonicalized path of the file is stored in the bfd,
10511 same as symfile_bfd_open. */
10514 open_dwo_file (const char *file_name
, const char *comp_dir
)
10518 if (IS_ABSOLUTE_PATH (file_name
))
10519 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 0 /*search_cwd*/);
10521 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
10523 if (comp_dir
!= NULL
)
10525 char *path_to_try
= concat (comp_dir
, SLASH_STRING
,
10526 file_name
, (char *) NULL
);
10528 /* NOTE: If comp_dir is a relative path, this will also try the
10529 search path, which seems useful. */
10530 abfd
= try_open_dwop_file (path_to_try
, 0 /*is_dwp*/, 1 /*search_cwd*/);
10531 xfree (path_to_try
);
10536 /* That didn't work, try debug-file-directory, which, despite its name,
10537 is a list of paths. */
10539 if (*debug_file_directory
== '\0')
10542 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 1 /*search_cwd*/);
10545 /* This function is mapped across the sections and remembers the offset and
10546 size of each of the DWO debugging sections we are interested in. */
10549 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
10551 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
10552 const struct dwop_section_names
*names
= &dwop_section_names
;
10554 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10556 dwo_sections
->abbrev
.s
.section
= sectp
;
10557 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
10559 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
10561 dwo_sections
->info
.s
.section
= sectp
;
10562 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
10564 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10566 dwo_sections
->line
.s
.section
= sectp
;
10567 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
10569 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10571 dwo_sections
->loc
.s
.section
= sectp
;
10572 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
10574 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10576 dwo_sections
->macinfo
.s
.section
= sectp
;
10577 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
10579 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10581 dwo_sections
->macro
.s
.section
= sectp
;
10582 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
10584 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
10586 dwo_sections
->str
.s
.section
= sectp
;
10587 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
10589 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10591 dwo_sections
->str_offsets
.s
.section
= sectp
;
10592 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
10594 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
10596 struct dwarf2_section_info type_section
;
10598 memset (&type_section
, 0, sizeof (type_section
));
10599 type_section
.s
.section
= sectp
;
10600 type_section
.size
= bfd_get_section_size (sectp
);
10601 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
10606 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
10607 by PER_CU. This is for the non-DWP case.
10608 The result is NULL if DWO_NAME can't be found. */
10610 static struct dwo_file
*
10611 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
10612 const char *dwo_name
, const char *comp_dir
)
10614 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10615 struct dwo_file
*dwo_file
;
10617 struct cleanup
*cleanups
;
10619 dbfd
= open_dwo_file (dwo_name
, comp_dir
);
10622 if (dwarf_read_debug
)
10623 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
10626 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10627 dwo_file
->dwo_name
= dwo_name
;
10628 dwo_file
->comp_dir
= comp_dir
;
10629 dwo_file
->dbfd
= dbfd
;
10631 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwo_file
);
10633 bfd_map_over_sections (dbfd
, dwarf2_locate_dwo_sections
, &dwo_file
->sections
);
10635 dwo_file
->cu
= create_dwo_cu (dwo_file
);
10637 dwo_file
->tus
= create_debug_types_hash_table (dwo_file
,
10638 dwo_file
->sections
.types
);
10640 discard_cleanups (cleanups
);
10642 if (dwarf_read_debug
)
10643 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
10648 /* This function is mapped across the sections and remembers the offset and
10649 size of each of the DWP debugging sections common to version 1 and 2 that
10650 we are interested in. */
10653 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
10654 void *dwp_file_ptr
)
10656 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
10657 const struct dwop_section_names
*names
= &dwop_section_names
;
10658 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
10660 /* Record the ELF section number for later lookup: this is what the
10661 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10662 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
10663 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
10665 /* Look for specific sections that we need. */
10666 if (section_is_p (sectp
->name
, &names
->str_dwo
))
10668 dwp_file
->sections
.str
.s
.section
= sectp
;
10669 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
10671 else if (section_is_p (sectp
->name
, &names
->cu_index
))
10673 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
10674 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
10676 else if (section_is_p (sectp
->name
, &names
->tu_index
))
10678 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
10679 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
10683 /* This function is mapped across the sections and remembers the offset and
10684 size of each of the DWP version 2 debugging sections that we are interested
10685 in. This is split into a separate function because we don't know if we
10686 have version 1 or 2 until we parse the cu_index/tu_index sections. */
10689 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
10691 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
10692 const struct dwop_section_names
*names
= &dwop_section_names
;
10693 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
10695 /* Record the ELF section number for later lookup: this is what the
10696 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10697 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
10698 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
10700 /* Look for specific sections that we need. */
10701 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10703 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
10704 dwp_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
10706 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
10708 dwp_file
->sections
.info
.s
.section
= sectp
;
10709 dwp_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
10711 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10713 dwp_file
->sections
.line
.s
.section
= sectp
;
10714 dwp_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
10716 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10718 dwp_file
->sections
.loc
.s
.section
= sectp
;
10719 dwp_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
10721 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10723 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
10724 dwp_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
10726 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10728 dwp_file
->sections
.macro
.s
.section
= sectp
;
10729 dwp_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
10731 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10733 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
10734 dwp_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
10736 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
10738 dwp_file
->sections
.types
.s
.section
= sectp
;
10739 dwp_file
->sections
.types
.size
= bfd_get_section_size (sectp
);
10743 /* Hash function for dwp_file loaded CUs/TUs. */
10746 hash_dwp_loaded_cutus (const void *item
)
10748 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
10750 /* This drops the top 32 bits of the signature, but is ok for a hash. */
10751 return dwo_unit
->signature
;
10754 /* Equality function for dwp_file loaded CUs/TUs. */
10757 eq_dwp_loaded_cutus (const void *a
, const void *b
)
10759 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
10760 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
10762 return dua
->signature
== dub
->signature
;
10765 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
10768 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
10770 return htab_create_alloc_ex (3,
10771 hash_dwp_loaded_cutus
,
10772 eq_dwp_loaded_cutus
,
10774 &objfile
->objfile_obstack
,
10775 hashtab_obstack_allocate
,
10776 dummy_obstack_deallocate
);
10779 /* Try to open DWP file FILE_NAME.
10780 The result is the bfd handle of the file.
10781 If there is a problem finding or opening the file, return NULL.
10782 Upon success, the canonicalized path of the file is stored in the bfd,
10783 same as symfile_bfd_open. */
10786 open_dwp_file (const char *file_name
)
10790 abfd
= try_open_dwop_file (file_name
, 1 /*is_dwp*/, 1 /*search_cwd*/);
10794 /* Work around upstream bug 15652.
10795 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
10796 [Whether that's a "bug" is debatable, but it is getting in our way.]
10797 We have no real idea where the dwp file is, because gdb's realpath-ing
10798 of the executable's path may have discarded the needed info.
10799 [IWBN if the dwp file name was recorded in the executable, akin to
10800 .gnu_debuglink, but that doesn't exist yet.]
10801 Strip the directory from FILE_NAME and search again. */
10802 if (*debug_file_directory
!= '\0')
10804 /* Don't implicitly search the current directory here.
10805 If the user wants to search "." to handle this case,
10806 it must be added to debug-file-directory. */
10807 return try_open_dwop_file (lbasename (file_name
), 1 /*is_dwp*/,
10814 /* Initialize the use of the DWP file for the current objfile.
10815 By convention the name of the DWP file is ${objfile}.dwp.
10816 The result is NULL if it can't be found. */
10818 static struct dwp_file
*
10819 open_and_init_dwp_file (void)
10821 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10822 struct dwp_file
*dwp_file
;
10825 struct cleanup
*cleanups
= make_cleanup (null_cleanup
, 0);
10827 /* Try to find first .dwp for the binary file before any symbolic links
10830 /* If the objfile is a debug file, find the name of the real binary
10831 file and get the name of dwp file from there. */
10832 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
10834 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
10835 const char *backlink_basename
= lbasename (backlink
->original_name
);
10836 char *debug_dirname
= ldirname (objfile
->original_name
);
10838 make_cleanup (xfree
, debug_dirname
);
10839 dwp_name
= xstrprintf ("%s%s%s.dwp", debug_dirname
,
10840 SLASH_STRING
, backlink_basename
);
10843 dwp_name
= xstrprintf ("%s.dwp", objfile
->original_name
);
10844 make_cleanup (xfree
, dwp_name
);
10846 dbfd
= open_dwp_file (dwp_name
);
10848 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
10850 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
10851 dwp_name
= xstrprintf ("%s.dwp", objfile_name (objfile
));
10852 make_cleanup (xfree
, dwp_name
);
10853 dbfd
= open_dwp_file (dwp_name
);
10858 if (dwarf_read_debug
)
10859 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
);
10860 do_cleanups (cleanups
);
10863 dwp_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_file
);
10864 dwp_file
->name
= bfd_get_filename (dbfd
);
10865 dwp_file
->dbfd
= dbfd
;
10866 do_cleanups (cleanups
);
10868 /* +1: section 0 is unused */
10869 dwp_file
->num_sections
= bfd_count_sections (dbfd
) + 1;
10870 dwp_file
->elf_sections
=
10871 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
10872 dwp_file
->num_sections
, asection
*);
10874 bfd_map_over_sections (dbfd
, dwarf2_locate_common_dwp_sections
, dwp_file
);
10876 dwp_file
->cus
= create_dwp_hash_table (dwp_file
, 0);
10878 dwp_file
->tus
= create_dwp_hash_table (dwp_file
, 1);
10880 /* The DWP file version is stored in the hash table. Oh well. */
10881 if (dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
10883 /* Technically speaking, we should try to limp along, but this is
10884 pretty bizarre. We use pulongest here because that's the established
10885 portability solution (e.g, we cannot use %u for uint32_t). */
10886 error (_("Dwarf Error: DWP file CU version %s doesn't match"
10887 " TU version %s [in DWP file %s]"),
10888 pulongest (dwp_file
->cus
->version
),
10889 pulongest (dwp_file
->tus
->version
), dwp_name
);
10891 dwp_file
->version
= dwp_file
->cus
->version
;
10893 if (dwp_file
->version
== 2)
10894 bfd_map_over_sections (dbfd
, dwarf2_locate_v2_dwp_sections
, dwp_file
);
10896 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
10897 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
10899 if (dwarf_read_debug
)
10901 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
10902 fprintf_unfiltered (gdb_stdlog
,
10903 " %s CUs, %s TUs\n",
10904 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
10905 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
10911 /* Wrapper around open_and_init_dwp_file, only open it once. */
10913 static struct dwp_file
*
10914 get_dwp_file (void)
10916 if (! dwarf2_per_objfile
->dwp_checked
)
10918 dwarf2_per_objfile
->dwp_file
= open_and_init_dwp_file ();
10919 dwarf2_per_objfile
->dwp_checked
= 1;
10921 return dwarf2_per_objfile
->dwp_file
;
10924 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
10925 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
10926 or in the DWP file for the objfile, referenced by THIS_UNIT.
10927 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
10928 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
10930 This is called, for example, when wanting to read a variable with a
10931 complex location. Therefore we don't want to do file i/o for every call.
10932 Therefore we don't want to look for a DWO file on every call.
10933 Therefore we first see if we've already seen SIGNATURE in a DWP file,
10934 then we check if we've already seen DWO_NAME, and only THEN do we check
10937 The result is a pointer to the dwo_unit object or NULL if we didn't find it
10938 (dwo_id mismatch or couldn't find the DWO/DWP file). */
10940 static struct dwo_unit
*
10941 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
10942 const char *dwo_name
, const char *comp_dir
,
10943 ULONGEST signature
, int is_debug_types
)
10945 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10946 const char *kind
= is_debug_types
? "TU" : "CU";
10947 void **dwo_file_slot
;
10948 struct dwo_file
*dwo_file
;
10949 struct dwp_file
*dwp_file
;
10951 /* First see if there's a DWP file.
10952 If we have a DWP file but didn't find the DWO inside it, don't
10953 look for the original DWO file. It makes gdb behave differently
10954 depending on whether one is debugging in the build tree. */
10956 dwp_file
= get_dwp_file ();
10957 if (dwp_file
!= NULL
)
10959 const struct dwp_hash_table
*dwp_htab
=
10960 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10962 if (dwp_htab
!= NULL
)
10964 struct dwo_unit
*dwo_cutu
=
10965 lookup_dwo_unit_in_dwp (dwp_file
, comp_dir
,
10966 signature
, is_debug_types
);
10968 if (dwo_cutu
!= NULL
)
10970 if (dwarf_read_debug
)
10972 fprintf_unfiltered (gdb_stdlog
,
10973 "Virtual DWO %s %s found: @%s\n",
10974 kind
, hex_string (signature
),
10975 host_address_to_string (dwo_cutu
));
10983 /* No DWP file, look for the DWO file. */
10985 dwo_file_slot
= lookup_dwo_file_slot (dwo_name
, comp_dir
);
10986 if (*dwo_file_slot
== NULL
)
10988 /* Read in the file and build a table of the CUs/TUs it contains. */
10989 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
10991 /* NOTE: This will be NULL if unable to open the file. */
10992 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
10994 if (dwo_file
!= NULL
)
10996 struct dwo_unit
*dwo_cutu
= NULL
;
10998 if (is_debug_types
&& dwo_file
->tus
)
11000 struct dwo_unit find_dwo_cutu
;
11002 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
11003 find_dwo_cutu
.signature
= signature
;
11005 = (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_cutu
);
11007 else if (!is_debug_types
&& dwo_file
->cu
)
11009 if (signature
== dwo_file
->cu
->signature
)
11010 dwo_cutu
= dwo_file
->cu
;
11013 if (dwo_cutu
!= NULL
)
11015 if (dwarf_read_debug
)
11017 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
11018 kind
, dwo_name
, hex_string (signature
),
11019 host_address_to_string (dwo_cutu
));
11026 /* We didn't find it. This could mean a dwo_id mismatch, or
11027 someone deleted the DWO/DWP file, or the search path isn't set up
11028 correctly to find the file. */
11030 if (dwarf_read_debug
)
11032 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
11033 kind
, dwo_name
, hex_string (signature
));
11036 /* This is a warning and not a complaint because it can be caused by
11037 pilot error (e.g., user accidentally deleting the DWO). */
11039 /* Print the name of the DWP file if we looked there, helps the user
11040 better diagnose the problem. */
11041 char *dwp_text
= NULL
;
11042 struct cleanup
*cleanups
;
11044 if (dwp_file
!= NULL
)
11045 dwp_text
= xstrprintf (" [in DWP file %s]", lbasename (dwp_file
->name
));
11046 cleanups
= make_cleanup (xfree
, dwp_text
);
11048 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x"
11049 " [in module %s]"),
11050 kind
, dwo_name
, hex_string (signature
),
11051 dwp_text
!= NULL
? dwp_text
: "",
11052 this_unit
->is_debug_types
? "TU" : "CU",
11053 this_unit
->offset
.sect_off
, objfile_name (objfile
));
11055 do_cleanups (cleanups
);
11060 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
11061 See lookup_dwo_cutu_unit for details. */
11063 static struct dwo_unit
*
11064 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
11065 const char *dwo_name
, const char *comp_dir
,
11066 ULONGEST signature
)
11068 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
11071 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
11072 See lookup_dwo_cutu_unit for details. */
11074 static struct dwo_unit
*
11075 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
11076 const char *dwo_name
, const char *comp_dir
)
11078 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
11081 /* Traversal function for queue_and_load_all_dwo_tus. */
11084 queue_and_load_dwo_tu (void **slot
, void *info
)
11086 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
11087 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
11088 ULONGEST signature
= dwo_unit
->signature
;
11089 struct signatured_type
*sig_type
=
11090 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
11092 if (sig_type
!= NULL
)
11094 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
11096 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
11097 a real dependency of PER_CU on SIG_TYPE. That is detected later
11098 while processing PER_CU. */
11099 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
11100 load_full_type_unit (sig_cu
);
11101 VEC_safe_push (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, sig_cu
);
11107 /* Queue all TUs contained in the DWO of PER_CU to be read in.
11108 The DWO may have the only definition of the type, though it may not be
11109 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
11110 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
11113 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
11115 struct dwo_unit
*dwo_unit
;
11116 struct dwo_file
*dwo_file
;
11118 gdb_assert (!per_cu
->is_debug_types
);
11119 gdb_assert (get_dwp_file () == NULL
);
11120 gdb_assert (per_cu
->cu
!= NULL
);
11122 dwo_unit
= per_cu
->cu
->dwo_unit
;
11123 gdb_assert (dwo_unit
!= NULL
);
11125 dwo_file
= dwo_unit
->dwo_file
;
11126 if (dwo_file
->tus
!= NULL
)
11127 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
11130 /* Free all resources associated with DWO_FILE.
11131 Close the DWO file and munmap the sections.
11132 All memory should be on the objfile obstack. */
11135 free_dwo_file (struct dwo_file
*dwo_file
, struct objfile
*objfile
)
11138 /* Note: dbfd is NULL for virtual DWO files. */
11139 gdb_bfd_unref (dwo_file
->dbfd
);
11141 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
11144 /* Wrapper for free_dwo_file for use in cleanups. */
11147 free_dwo_file_cleanup (void *arg
)
11149 struct dwo_file
*dwo_file
= (struct dwo_file
*) arg
;
11150 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11152 free_dwo_file (dwo_file
, objfile
);
11155 /* Traversal function for free_dwo_files. */
11158 free_dwo_file_from_slot (void **slot
, void *info
)
11160 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
11161 struct objfile
*objfile
= (struct objfile
*) info
;
11163 free_dwo_file (dwo_file
, objfile
);
11168 /* Free all resources associated with DWO_FILES. */
11171 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
11173 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
11176 /* Read in various DIEs. */
11178 /* qsort helper for inherit_abstract_dies. */
11181 unsigned_int_compar (const void *ap
, const void *bp
)
11183 unsigned int a
= *(unsigned int *) ap
;
11184 unsigned int b
= *(unsigned int *) bp
;
11186 return (a
> b
) - (b
> a
);
11189 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
11190 Inherit only the children of the DW_AT_abstract_origin DIE not being
11191 already referenced by DW_AT_abstract_origin from the children of the
11195 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
11197 struct die_info
*child_die
;
11198 unsigned die_children_count
;
11199 /* CU offsets which were referenced by children of the current DIE. */
11200 sect_offset
*offsets
;
11201 sect_offset
*offsets_end
, *offsetp
;
11202 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
11203 struct die_info
*origin_die
;
11204 /* Iterator of the ORIGIN_DIE children. */
11205 struct die_info
*origin_child_die
;
11206 struct cleanup
*cleanups
;
11207 struct attribute
*attr
;
11208 struct dwarf2_cu
*origin_cu
;
11209 struct pending
**origin_previous_list_in_scope
;
11211 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
11215 /* Note that following die references may follow to a die in a
11219 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
11221 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
11223 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
11224 origin_cu
->list_in_scope
= cu
->list_in_scope
;
11226 if (die
->tag
!= origin_die
->tag
11227 && !(die
->tag
== DW_TAG_inlined_subroutine
11228 && origin_die
->tag
== DW_TAG_subprogram
))
11229 complaint (&symfile_complaints
,
11230 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
11231 die
->offset
.sect_off
, origin_die
->offset
.sect_off
);
11233 child_die
= die
->child
;
11234 die_children_count
= 0;
11235 while (child_die
&& child_die
->tag
)
11237 child_die
= sibling_die (child_die
);
11238 die_children_count
++;
11240 offsets
= XNEWVEC (sect_offset
, die_children_count
);
11241 cleanups
= make_cleanup (xfree
, offsets
);
11243 offsets_end
= offsets
;
11244 for (child_die
= die
->child
;
11245 child_die
&& child_die
->tag
;
11246 child_die
= sibling_die (child_die
))
11248 struct die_info
*child_origin_die
;
11249 struct dwarf2_cu
*child_origin_cu
;
11251 /* We are trying to process concrete instance entries:
11252 DW_TAG_GNU_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
11253 it's not relevant to our analysis here. i.e. detecting DIEs that are
11254 present in the abstract instance but not referenced in the concrete
11256 if (child_die
->tag
== DW_TAG_GNU_call_site
)
11259 /* For each CHILD_DIE, find the corresponding child of
11260 ORIGIN_DIE. If there is more than one layer of
11261 DW_AT_abstract_origin, follow them all; there shouldn't be,
11262 but GCC versions at least through 4.4 generate this (GCC PR
11264 child_origin_die
= child_die
;
11265 child_origin_cu
= cu
;
11268 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
11272 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
11276 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
11277 counterpart may exist. */
11278 if (child_origin_die
!= child_die
)
11280 if (child_die
->tag
!= child_origin_die
->tag
11281 && !(child_die
->tag
== DW_TAG_inlined_subroutine
11282 && child_origin_die
->tag
== DW_TAG_subprogram
))
11283 complaint (&symfile_complaints
,
11284 _("Child DIE 0x%x and its abstract origin 0x%x have "
11285 "different tags"), child_die
->offset
.sect_off
,
11286 child_origin_die
->offset
.sect_off
);
11287 if (child_origin_die
->parent
!= origin_die
)
11288 complaint (&symfile_complaints
,
11289 _("Child DIE 0x%x and its abstract origin 0x%x have "
11290 "different parents"), child_die
->offset
.sect_off
,
11291 child_origin_die
->offset
.sect_off
);
11293 *offsets_end
++ = child_origin_die
->offset
;
11296 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
11297 unsigned_int_compar
);
11298 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
11299 if (offsetp
[-1].sect_off
== offsetp
->sect_off
)
11300 complaint (&symfile_complaints
,
11301 _("Multiple children of DIE 0x%x refer "
11302 "to DIE 0x%x as their abstract origin"),
11303 die
->offset
.sect_off
, offsetp
->sect_off
);
11306 origin_child_die
= origin_die
->child
;
11307 while (origin_child_die
&& origin_child_die
->tag
)
11309 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
11310 while (offsetp
< offsets_end
11311 && offsetp
->sect_off
< origin_child_die
->offset
.sect_off
)
11313 if (offsetp
>= offsets_end
11314 || offsetp
->sect_off
> origin_child_die
->offset
.sect_off
)
11316 /* Found that ORIGIN_CHILD_DIE is really not referenced.
11317 Check whether we're already processing ORIGIN_CHILD_DIE.
11318 This can happen with mutually referenced abstract_origins.
11320 if (!origin_child_die
->in_process
)
11321 process_die (origin_child_die
, origin_cu
);
11323 origin_child_die
= sibling_die (origin_child_die
);
11325 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
11327 do_cleanups (cleanups
);
11331 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11333 struct objfile
*objfile
= cu
->objfile
;
11334 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11335 struct context_stack
*newobj
;
11338 struct die_info
*child_die
;
11339 struct attribute
*attr
, *call_line
, *call_file
;
11341 CORE_ADDR baseaddr
;
11342 struct block
*block
;
11343 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
11344 VEC (symbolp
) *template_args
= NULL
;
11345 struct template_symbol
*templ_func
= NULL
;
11349 /* If we do not have call site information, we can't show the
11350 caller of this inlined function. That's too confusing, so
11351 only use the scope for local variables. */
11352 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
11353 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
11354 if (call_line
== NULL
|| call_file
== NULL
)
11356 read_lexical_block_scope (die
, cu
);
11361 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11363 name
= dwarf2_name (die
, cu
);
11365 /* Ignore functions with missing or empty names. These are actually
11366 illegal according to the DWARF standard. */
11369 complaint (&symfile_complaints
,
11370 _("missing name for subprogram DIE at %d"),
11371 die
->offset
.sect_off
);
11375 /* Ignore functions with missing or invalid low and high pc attributes. */
11376 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
11378 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
11379 if (!attr
|| !DW_UNSND (attr
))
11380 complaint (&symfile_complaints
,
11381 _("cannot get low and high bounds "
11382 "for subprogram DIE at %d"),
11383 die
->offset
.sect_off
);
11387 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11388 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
11390 /* If we have any template arguments, then we must allocate a
11391 different sort of symbol. */
11392 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
11394 if (child_die
->tag
== DW_TAG_template_type_param
11395 || child_die
->tag
== DW_TAG_template_value_param
)
11397 templ_func
= allocate_template_symbol (objfile
);
11398 templ_func
->base
.is_cplus_template_function
= 1;
11403 newobj
= push_context (0, lowpc
);
11404 newobj
->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
11405 (struct symbol
*) templ_func
);
11407 /* If there is a location expression for DW_AT_frame_base, record
11409 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
11411 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
11413 /* If there is a location for the static link, record it. */
11414 newobj
->static_link
= NULL
;
11415 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
11418 newobj
->static_link
11419 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
11420 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
);
11423 cu
->list_in_scope
= &local_symbols
;
11425 if (die
->child
!= NULL
)
11427 child_die
= die
->child
;
11428 while (child_die
&& child_die
->tag
)
11430 if (child_die
->tag
== DW_TAG_template_type_param
11431 || child_die
->tag
== DW_TAG_template_value_param
)
11433 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
11436 VEC_safe_push (symbolp
, template_args
, arg
);
11439 process_die (child_die
, cu
);
11440 child_die
= sibling_die (child_die
);
11444 inherit_abstract_dies (die
, cu
);
11446 /* If we have a DW_AT_specification, we might need to import using
11447 directives from the context of the specification DIE. See the
11448 comment in determine_prefix. */
11449 if (cu
->language
== language_cplus
11450 && dwarf2_attr (die
, DW_AT_specification
, cu
))
11452 struct dwarf2_cu
*spec_cu
= cu
;
11453 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
11457 child_die
= spec_die
->child
;
11458 while (child_die
&& child_die
->tag
)
11460 if (child_die
->tag
== DW_TAG_imported_module
)
11461 process_die (child_die
, spec_cu
);
11462 child_die
= sibling_die (child_die
);
11465 /* In some cases, GCC generates specification DIEs that
11466 themselves contain DW_AT_specification attributes. */
11467 spec_die
= die_specification (spec_die
, &spec_cu
);
11471 newobj
= pop_context ();
11472 /* Make a block for the local symbols within. */
11473 block
= finish_block (newobj
->name
, &local_symbols
, newobj
->old_blocks
,
11474 newobj
->static_link
, lowpc
, highpc
);
11476 /* For C++, set the block's scope. */
11477 if ((cu
->language
== language_cplus
11478 || cu
->language
== language_fortran
11479 || cu
->language
== language_d
11480 || cu
->language
== language_rust
)
11481 && cu
->processing_has_namespace_info
)
11482 block_set_scope (block
, determine_prefix (die
, cu
),
11483 &objfile
->objfile_obstack
);
11485 /* If we have address ranges, record them. */
11486 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11488 gdbarch_make_symbol_special (gdbarch
, newobj
->name
, objfile
);
11490 /* Attach template arguments to function. */
11491 if (! VEC_empty (symbolp
, template_args
))
11493 gdb_assert (templ_func
!= NULL
);
11495 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
11496 templ_func
->template_arguments
11497 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
11498 templ_func
->n_template_arguments
);
11499 memcpy (templ_func
->template_arguments
,
11500 VEC_address (symbolp
, template_args
),
11501 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
11502 VEC_free (symbolp
, template_args
);
11505 /* In C++, we can have functions nested inside functions (e.g., when
11506 a function declares a class that has methods). This means that
11507 when we finish processing a function scope, we may need to go
11508 back to building a containing block's symbol lists. */
11509 local_symbols
= newobj
->locals
;
11510 local_using_directives
= newobj
->local_using_directives
;
11512 /* If we've finished processing a top-level function, subsequent
11513 symbols go in the file symbol list. */
11514 if (outermost_context_p ())
11515 cu
->list_in_scope
= &file_symbols
;
11518 /* Process all the DIES contained within a lexical block scope. Start
11519 a new scope, process the dies, and then close the scope. */
11522 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11524 struct objfile
*objfile
= cu
->objfile
;
11525 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11526 struct context_stack
*newobj
;
11527 CORE_ADDR lowpc
, highpc
;
11528 struct die_info
*child_die
;
11529 CORE_ADDR baseaddr
;
11531 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11533 /* Ignore blocks with missing or invalid low and high pc attributes. */
11534 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
11535 as multiple lexical blocks? Handling children in a sane way would
11536 be nasty. Might be easier to properly extend generic blocks to
11537 describe ranges. */
11538 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
11540 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11541 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
11543 push_context (0, lowpc
);
11544 if (die
->child
!= NULL
)
11546 child_die
= die
->child
;
11547 while (child_die
&& child_die
->tag
)
11549 process_die (child_die
, cu
);
11550 child_die
= sibling_die (child_die
);
11553 inherit_abstract_dies (die
, cu
);
11554 newobj
= pop_context ();
11556 if (local_symbols
!= NULL
|| local_using_directives
!= NULL
)
11558 struct block
*block
11559 = finish_block (0, &local_symbols
, newobj
->old_blocks
, NULL
,
11560 newobj
->start_addr
, highpc
);
11562 /* Note that recording ranges after traversing children, as we
11563 do here, means that recording a parent's ranges entails
11564 walking across all its children's ranges as they appear in
11565 the address map, which is quadratic behavior.
11567 It would be nicer to record the parent's ranges before
11568 traversing its children, simply overriding whatever you find
11569 there. But since we don't even decide whether to create a
11570 block until after we've traversed its children, that's hard
11572 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11574 local_symbols
= newobj
->locals
;
11575 local_using_directives
= newobj
->local_using_directives
;
11578 /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */
11581 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11583 struct objfile
*objfile
= cu
->objfile
;
11584 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11585 CORE_ADDR pc
, baseaddr
;
11586 struct attribute
*attr
;
11587 struct call_site
*call_site
, call_site_local
;
11590 struct die_info
*child_die
;
11592 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11594 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
11597 complaint (&symfile_complaints
,
11598 _("missing DW_AT_low_pc for DW_TAG_GNU_call_site "
11599 "DIE 0x%x [in module %s]"),
11600 die
->offset
.sect_off
, objfile_name (objfile
));
11603 pc
= attr_value_as_address (attr
) + baseaddr
;
11604 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
11606 if (cu
->call_site_htab
== NULL
)
11607 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
11608 NULL
, &objfile
->objfile_obstack
,
11609 hashtab_obstack_allocate
, NULL
);
11610 call_site_local
.pc
= pc
;
11611 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
11614 complaint (&symfile_complaints
,
11615 _("Duplicate PC %s for DW_TAG_GNU_call_site "
11616 "DIE 0x%x [in module %s]"),
11617 paddress (gdbarch
, pc
), die
->offset
.sect_off
,
11618 objfile_name (objfile
));
11622 /* Count parameters at the caller. */
11625 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
11626 child_die
= sibling_die (child_die
))
11628 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11630 complaint (&symfile_complaints
,
11631 _("Tag %d is not DW_TAG_GNU_call_site_parameter in "
11632 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11633 child_die
->tag
, child_die
->offset
.sect_off
,
11634 objfile_name (objfile
));
11642 = ((struct call_site
*)
11643 obstack_alloc (&objfile
->objfile_obstack
,
11644 sizeof (*call_site
)
11645 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
11647 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
11648 call_site
->pc
= pc
;
11650 if (dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
11652 struct die_info
*func_die
;
11654 /* Skip also over DW_TAG_inlined_subroutine. */
11655 for (func_die
= die
->parent
;
11656 func_die
&& func_die
->tag
!= DW_TAG_subprogram
11657 && func_die
->tag
!= DW_TAG_subroutine_type
;
11658 func_die
= func_die
->parent
);
11660 /* DW_AT_GNU_all_call_sites is a superset
11661 of DW_AT_GNU_all_tail_call_sites. */
11663 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
11664 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
11666 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
11667 not complete. But keep CALL_SITE for look ups via call_site_htab,
11668 both the initial caller containing the real return address PC and
11669 the final callee containing the current PC of a chain of tail
11670 calls do not need to have the tail call list complete. But any
11671 function candidate for a virtual tail call frame searched via
11672 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
11673 determined unambiguously. */
11677 struct type
*func_type
= NULL
;
11680 func_type
= get_die_type (func_die
, cu
);
11681 if (func_type
!= NULL
)
11683 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
11685 /* Enlist this call site to the function. */
11686 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
11687 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
11690 complaint (&symfile_complaints
,
11691 _("Cannot find function owning DW_TAG_GNU_call_site "
11692 "DIE 0x%x [in module %s]"),
11693 die
->offset
.sect_off
, objfile_name (objfile
));
11697 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
11699 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
11700 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
11701 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
11702 /* Keep NULL DWARF_BLOCK. */;
11703 else if (attr_form_is_block (attr
))
11705 struct dwarf2_locexpr_baton
*dlbaton
;
11707 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
11708 dlbaton
->data
= DW_BLOCK (attr
)->data
;
11709 dlbaton
->size
= DW_BLOCK (attr
)->size
;
11710 dlbaton
->per_cu
= cu
->per_cu
;
11712 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
11714 else if (attr_form_is_ref (attr
))
11716 struct dwarf2_cu
*target_cu
= cu
;
11717 struct die_info
*target_die
;
11719 target_die
= follow_die_ref (die
, attr
, &target_cu
);
11720 gdb_assert (target_cu
->objfile
== objfile
);
11721 if (die_is_declaration (target_die
, target_cu
))
11723 const char *target_physname
;
11725 /* Prefer the mangled name; otherwise compute the demangled one. */
11726 target_physname
= dwarf2_string_attr (target_die
,
11727 DW_AT_linkage_name
,
11729 if (target_physname
== NULL
)
11730 target_physname
= dwarf2_string_attr (target_die
,
11731 DW_AT_MIPS_linkage_name
,
11733 if (target_physname
== NULL
)
11734 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
11735 if (target_physname
== NULL
)
11736 complaint (&symfile_complaints
,
11737 _("DW_AT_GNU_call_site_target target DIE has invalid "
11738 "physname, for referencing DIE 0x%x [in module %s]"),
11739 die
->offset
.sect_off
, objfile_name (objfile
));
11741 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
11747 /* DW_AT_entry_pc should be preferred. */
11748 if (!dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
))
11749 complaint (&symfile_complaints
,
11750 _("DW_AT_GNU_call_site_target target DIE has invalid "
11751 "low pc, for referencing DIE 0x%x [in module %s]"),
11752 die
->offset
.sect_off
, objfile_name (objfile
));
11755 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11756 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
11761 complaint (&symfile_complaints
,
11762 _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither "
11763 "block nor reference, for DIE 0x%x [in module %s]"),
11764 die
->offset
.sect_off
, objfile_name (objfile
));
11766 call_site
->per_cu
= cu
->per_cu
;
11768 for (child_die
= die
->child
;
11769 child_die
&& child_die
->tag
;
11770 child_die
= sibling_die (child_die
))
11772 struct call_site_parameter
*parameter
;
11773 struct attribute
*loc
, *origin
;
11775 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11777 /* Already printed the complaint above. */
11781 gdb_assert (call_site
->parameter_count
< nparams
);
11782 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
11784 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
11785 specifies DW_TAG_formal_parameter. Value of the data assumed for the
11786 register is contained in DW_AT_GNU_call_site_value. */
11788 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
11789 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
11790 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
11792 sect_offset offset
;
11794 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
11795 offset
= dwarf2_get_ref_die_offset (origin
);
11796 if (!offset_in_cu_p (&cu
->header
, offset
))
11798 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
11799 binding can be done only inside one CU. Such referenced DIE
11800 therefore cannot be even moved to DW_TAG_partial_unit. */
11801 complaint (&symfile_complaints
,
11802 _("DW_AT_abstract_origin offset is not in CU for "
11803 "DW_TAG_GNU_call_site child DIE 0x%x "
11805 child_die
->offset
.sect_off
, objfile_name (objfile
));
11808 parameter
->u
.param_offset
.cu_off
= (offset
.sect_off
11809 - cu
->header
.offset
.sect_off
);
11811 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
11813 complaint (&symfile_complaints
,
11814 _("No DW_FORM_block* DW_AT_location for "
11815 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11816 child_die
->offset
.sect_off
, objfile_name (objfile
));
11821 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
11822 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
11823 if (parameter
->u
.dwarf_reg
!= -1)
11824 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
11825 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
11826 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
11827 ¶meter
->u
.fb_offset
))
11828 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
11831 complaint (&symfile_complaints
,
11832 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
11833 "for DW_FORM_block* DW_AT_location is supported for "
11834 "DW_TAG_GNU_call_site child DIE 0x%x "
11836 child_die
->offset
.sect_off
, objfile_name (objfile
));
11841 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
11842 if (!attr_form_is_block (attr
))
11844 complaint (&symfile_complaints
,
11845 _("No DW_FORM_block* DW_AT_GNU_call_site_value for "
11846 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11847 child_die
->offset
.sect_off
, objfile_name (objfile
));
11850 parameter
->value
= DW_BLOCK (attr
)->data
;
11851 parameter
->value_size
= DW_BLOCK (attr
)->size
;
11853 /* Parameters are not pre-cleared by memset above. */
11854 parameter
->data_value
= NULL
;
11855 parameter
->data_value_size
= 0;
11856 call_site
->parameter_count
++;
11858 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
11861 if (!attr_form_is_block (attr
))
11862 complaint (&symfile_complaints
,
11863 _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for "
11864 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11865 child_die
->offset
.sect_off
, objfile_name (objfile
));
11868 parameter
->data_value
= DW_BLOCK (attr
)->data
;
11869 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
11875 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
11876 Return 1 if the attributes are present and valid, otherwise, return 0.
11877 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
11880 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
11881 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
11882 struct partial_symtab
*ranges_pst
)
11884 struct objfile
*objfile
= cu
->objfile
;
11885 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11886 struct comp_unit_head
*cu_header
= &cu
->header
;
11887 bfd
*obfd
= objfile
->obfd
;
11888 unsigned int addr_size
= cu_header
->addr_size
;
11889 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
11890 /* Base address selection entry. */
11893 unsigned int dummy
;
11894 const gdb_byte
*buffer
;
11897 CORE_ADDR high
= 0;
11898 CORE_ADDR baseaddr
;
11900 found_base
= cu
->base_known
;
11901 base
= cu
->base_address
;
11903 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
11904 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
11906 complaint (&symfile_complaints
,
11907 _("Offset %d out of bounds for DW_AT_ranges attribute"),
11911 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
11915 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11919 CORE_ADDR range_beginning
, range_end
;
11921 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
11922 buffer
+= addr_size
;
11923 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
11924 buffer
+= addr_size
;
11925 offset
+= 2 * addr_size
;
11927 /* An end of list marker is a pair of zero addresses. */
11928 if (range_beginning
== 0 && range_end
== 0)
11929 /* Found the end of list entry. */
11932 /* Each base address selection entry is a pair of 2 values.
11933 The first is the largest possible address, the second is
11934 the base address. Check for a base address here. */
11935 if ((range_beginning
& mask
) == mask
)
11937 /* If we found the largest possible address, then we already
11938 have the base address in range_end. */
11946 /* We have no valid base address for the ranges
11948 complaint (&symfile_complaints
,
11949 _("Invalid .debug_ranges data (no base address)"));
11953 if (range_beginning
> range_end
)
11955 /* Inverted range entries are invalid. */
11956 complaint (&symfile_complaints
,
11957 _("Invalid .debug_ranges data (inverted range)"));
11961 /* Empty range entries have no effect. */
11962 if (range_beginning
== range_end
)
11965 range_beginning
+= base
;
11968 /* A not-uncommon case of bad debug info.
11969 Don't pollute the addrmap with bad data. */
11970 if (range_beginning
+ baseaddr
== 0
11971 && !dwarf2_per_objfile
->has_section_at_zero
)
11973 complaint (&symfile_complaints
,
11974 _(".debug_ranges entry has start address of zero"
11975 " [in module %s]"), objfile_name (objfile
));
11979 if (ranges_pst
!= NULL
)
11984 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
11985 range_beginning
+ baseaddr
);
11986 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
11987 range_end
+ baseaddr
);
11988 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
11992 /* FIXME: This is recording everything as a low-high
11993 segment of consecutive addresses. We should have a
11994 data structure for discontiguous block ranges
11998 low
= range_beginning
;
12004 if (range_beginning
< low
)
12005 low
= range_beginning
;
12006 if (range_end
> high
)
12012 /* If the first entry is an end-of-list marker, the range
12013 describes an empty scope, i.e. no instructions. */
12019 *high_return
= high
;
12023 /* Get low and high pc attributes from a die. Return 1 if the attributes
12024 are present and valid, otherwise, return 0. Return -1 if the range is
12025 discontinuous, i.e. derived from DW_AT_ranges information. */
12028 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
12029 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
12030 struct partial_symtab
*pst
)
12032 struct attribute
*attr
;
12033 struct attribute
*attr_high
;
12035 CORE_ADDR high
= 0;
12038 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
12041 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
12044 low
= attr_value_as_address (attr
);
12045 high
= attr_value_as_address (attr_high
);
12046 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
12050 /* Found high w/o low attribute. */
12053 /* Found consecutive range of addresses. */
12058 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
12061 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
12062 We take advantage of the fact that DW_AT_ranges does not appear
12063 in DW_TAG_compile_unit of DWO files. */
12064 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
12065 unsigned int ranges_offset
= (DW_UNSND (attr
)
12066 + (need_ranges_base
12070 /* Value of the DW_AT_ranges attribute is the offset in the
12071 .debug_ranges section. */
12072 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
12074 /* Found discontinuous range of addresses. */
12079 /* read_partial_die has also the strict LOW < HIGH requirement. */
12083 /* When using the GNU linker, .gnu.linkonce. sections are used to
12084 eliminate duplicate copies of functions and vtables and such.
12085 The linker will arbitrarily choose one and discard the others.
12086 The AT_*_pc values for such functions refer to local labels in
12087 these sections. If the section from that file was discarded, the
12088 labels are not in the output, so the relocs get a value of 0.
12089 If this is a discarded function, mark the pc bounds as invalid,
12090 so that GDB will ignore it. */
12091 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12100 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
12101 its low and high PC addresses. Do nothing if these addresses could not
12102 be determined. Otherwise, set LOWPC to the low address if it is smaller,
12103 and HIGHPC to the high address if greater than HIGHPC. */
12106 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
12107 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
12108 struct dwarf2_cu
*cu
)
12110 CORE_ADDR low
, high
;
12111 struct die_info
*child
= die
->child
;
12113 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
12115 *lowpc
= min (*lowpc
, low
);
12116 *highpc
= max (*highpc
, high
);
12119 /* If the language does not allow nested subprograms (either inside
12120 subprograms or lexical blocks), we're done. */
12121 if (cu
->language
!= language_ada
)
12124 /* Check all the children of the given DIE. If it contains nested
12125 subprograms, then check their pc bounds. Likewise, we need to
12126 check lexical blocks as well, as they may also contain subprogram
12128 while (child
&& child
->tag
)
12130 if (child
->tag
== DW_TAG_subprogram
12131 || child
->tag
== DW_TAG_lexical_block
)
12132 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
12133 child
= sibling_die (child
);
12137 /* Get the low and high pc's represented by the scope DIE, and store
12138 them in *LOWPC and *HIGHPC. If the correct values can't be
12139 determined, set *LOWPC to -1 and *HIGHPC to 0. */
12142 get_scope_pc_bounds (struct die_info
*die
,
12143 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
12144 struct dwarf2_cu
*cu
)
12146 CORE_ADDR best_low
= (CORE_ADDR
) -1;
12147 CORE_ADDR best_high
= (CORE_ADDR
) 0;
12148 CORE_ADDR current_low
, current_high
;
12150 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
12152 best_low
= current_low
;
12153 best_high
= current_high
;
12157 struct die_info
*child
= die
->child
;
12159 while (child
&& child
->tag
)
12161 switch (child
->tag
) {
12162 case DW_TAG_subprogram
:
12163 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
12165 case DW_TAG_namespace
:
12166 case DW_TAG_module
:
12167 /* FIXME: carlton/2004-01-16: Should we do this for
12168 DW_TAG_class_type/DW_TAG_structure_type, too? I think
12169 that current GCC's always emit the DIEs corresponding
12170 to definitions of methods of classes as children of a
12171 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
12172 the DIEs giving the declarations, which could be
12173 anywhere). But I don't see any reason why the
12174 standards says that they have to be there. */
12175 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
12177 if (current_low
!= ((CORE_ADDR
) -1))
12179 best_low
= min (best_low
, current_low
);
12180 best_high
= max (best_high
, current_high
);
12188 child
= sibling_die (child
);
12193 *highpc
= best_high
;
12196 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
12200 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
12201 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
12203 struct objfile
*objfile
= cu
->objfile
;
12204 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12205 struct attribute
*attr
;
12206 struct attribute
*attr_high
;
12208 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
12211 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
12214 CORE_ADDR low
= attr_value_as_address (attr
);
12215 CORE_ADDR high
= attr_value_as_address (attr_high
);
12217 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
12220 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
12221 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
12222 record_block_range (block
, low
, high
- 1);
12226 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
12229 bfd
*obfd
= objfile
->obfd
;
12230 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
12231 We take advantage of the fact that DW_AT_ranges does not appear
12232 in DW_TAG_compile_unit of DWO files. */
12233 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
12235 /* The value of the DW_AT_ranges attribute is the offset of the
12236 address range list in the .debug_ranges section. */
12237 unsigned long offset
= (DW_UNSND (attr
)
12238 + (need_ranges_base
? cu
->ranges_base
: 0));
12239 const gdb_byte
*buffer
;
12241 /* For some target architectures, but not others, the
12242 read_address function sign-extends the addresses it returns.
12243 To recognize base address selection entries, we need a
12245 unsigned int addr_size
= cu
->header
.addr_size
;
12246 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
12248 /* The base address, to which the next pair is relative. Note
12249 that this 'base' is a DWARF concept: most entries in a range
12250 list are relative, to reduce the number of relocs against the
12251 debugging information. This is separate from this function's
12252 'baseaddr' argument, which GDB uses to relocate debugging
12253 information from a shared library based on the address at
12254 which the library was loaded. */
12255 CORE_ADDR base
= cu
->base_address
;
12256 int base_known
= cu
->base_known
;
12258 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
12259 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
12261 complaint (&symfile_complaints
,
12262 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
12266 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
12270 unsigned int bytes_read
;
12271 CORE_ADDR start
, end
;
12273 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12274 buffer
+= bytes_read
;
12275 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12276 buffer
+= bytes_read
;
12278 /* Did we find the end of the range list? */
12279 if (start
== 0 && end
== 0)
12282 /* Did we find a base address selection entry? */
12283 else if ((start
& base_select_mask
) == base_select_mask
)
12289 /* We found an ordinary address range. */
12294 complaint (&symfile_complaints
,
12295 _("Invalid .debug_ranges data "
12296 "(no base address)"));
12302 /* Inverted range entries are invalid. */
12303 complaint (&symfile_complaints
,
12304 _("Invalid .debug_ranges data "
12305 "(inverted range)"));
12309 /* Empty range entries have no effect. */
12313 start
+= base
+ baseaddr
;
12314 end
+= base
+ baseaddr
;
12316 /* A not-uncommon case of bad debug info.
12317 Don't pollute the addrmap with bad data. */
12318 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12320 complaint (&symfile_complaints
,
12321 _(".debug_ranges entry has start address of zero"
12322 " [in module %s]"), objfile_name (objfile
));
12326 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
12327 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
12328 record_block_range (block
, start
, end
- 1);
12334 /* Check whether the producer field indicates either of GCC < 4.6, or the
12335 Intel C/C++ compiler, and cache the result in CU. */
12338 check_producer (struct dwarf2_cu
*cu
)
12342 if (cu
->producer
== NULL
)
12344 /* For unknown compilers expect their behavior is DWARF version
12347 GCC started to support .debug_types sections by -gdwarf-4 since
12348 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
12349 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
12350 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
12351 interpreted incorrectly by GDB now - GCC PR debug/48229. */
12353 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
12355 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
12356 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
12358 else if (startswith (cu
->producer
, "Intel(R) C"))
12359 cu
->producer_is_icc
= 1;
12362 /* For other non-GCC compilers, expect their behavior is DWARF version
12366 cu
->checked_producer
= 1;
12369 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
12370 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
12371 during 4.6.0 experimental. */
12374 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
12376 if (!cu
->checked_producer
)
12377 check_producer (cu
);
12379 return cu
->producer_is_gxx_lt_4_6
;
12382 /* Return the default accessibility type if it is not overriden by
12383 DW_AT_accessibility. */
12385 static enum dwarf_access_attribute
12386 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
12388 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
12390 /* The default DWARF 2 accessibility for members is public, the default
12391 accessibility for inheritance is private. */
12393 if (die
->tag
!= DW_TAG_inheritance
)
12394 return DW_ACCESS_public
;
12396 return DW_ACCESS_private
;
12400 /* DWARF 3+ defines the default accessibility a different way. The same
12401 rules apply now for DW_TAG_inheritance as for the members and it only
12402 depends on the container kind. */
12404 if (die
->parent
->tag
== DW_TAG_class_type
)
12405 return DW_ACCESS_private
;
12407 return DW_ACCESS_public
;
12411 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
12412 offset. If the attribute was not found return 0, otherwise return
12413 1. If it was found but could not properly be handled, set *OFFSET
12417 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
12420 struct attribute
*attr
;
12422 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
12427 /* Note that we do not check for a section offset first here.
12428 This is because DW_AT_data_member_location is new in DWARF 4,
12429 so if we see it, we can assume that a constant form is really
12430 a constant and not a section offset. */
12431 if (attr_form_is_constant (attr
))
12432 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
12433 else if (attr_form_is_section_offset (attr
))
12434 dwarf2_complex_location_expr_complaint ();
12435 else if (attr_form_is_block (attr
))
12436 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12438 dwarf2_complex_location_expr_complaint ();
12446 /* Add an aggregate field to the field list. */
12449 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
12450 struct dwarf2_cu
*cu
)
12452 struct objfile
*objfile
= cu
->objfile
;
12453 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12454 struct nextfield
*new_field
;
12455 struct attribute
*attr
;
12457 const char *fieldname
= "";
12459 /* Allocate a new field list entry and link it in. */
12460 new_field
= XNEW (struct nextfield
);
12461 make_cleanup (xfree
, new_field
);
12462 memset (new_field
, 0, sizeof (struct nextfield
));
12464 if (die
->tag
== DW_TAG_inheritance
)
12466 new_field
->next
= fip
->baseclasses
;
12467 fip
->baseclasses
= new_field
;
12471 new_field
->next
= fip
->fields
;
12472 fip
->fields
= new_field
;
12476 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
12478 new_field
->accessibility
= DW_UNSND (attr
);
12480 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
12481 if (new_field
->accessibility
!= DW_ACCESS_public
)
12482 fip
->non_public_fields
= 1;
12484 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
12486 new_field
->virtuality
= DW_UNSND (attr
);
12488 new_field
->virtuality
= DW_VIRTUALITY_none
;
12490 fp
= &new_field
->field
;
12492 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
12496 /* Data member other than a C++ static data member. */
12498 /* Get type of field. */
12499 fp
->type
= die_type (die
, cu
);
12501 SET_FIELD_BITPOS (*fp
, 0);
12503 /* Get bit size of field (zero if none). */
12504 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
12507 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
12511 FIELD_BITSIZE (*fp
) = 0;
12514 /* Get bit offset of field. */
12515 if (handle_data_member_location (die
, cu
, &offset
))
12516 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
12517 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
12520 if (gdbarch_bits_big_endian (gdbarch
))
12522 /* For big endian bits, the DW_AT_bit_offset gives the
12523 additional bit offset from the MSB of the containing
12524 anonymous object to the MSB of the field. We don't
12525 have to do anything special since we don't need to
12526 know the size of the anonymous object. */
12527 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
12531 /* For little endian bits, compute the bit offset to the
12532 MSB of the anonymous object, subtract off the number of
12533 bits from the MSB of the field to the MSB of the
12534 object, and then subtract off the number of bits of
12535 the field itself. The result is the bit offset of
12536 the LSB of the field. */
12537 int anonymous_size
;
12538 int bit_offset
= DW_UNSND (attr
);
12540 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12543 /* The size of the anonymous object containing
12544 the bit field is explicit, so use the
12545 indicated size (in bytes). */
12546 anonymous_size
= DW_UNSND (attr
);
12550 /* The size of the anonymous object containing
12551 the bit field must be inferred from the type
12552 attribute of the data member containing the
12554 anonymous_size
= TYPE_LENGTH (fp
->type
);
12556 SET_FIELD_BITPOS (*fp
,
12557 (FIELD_BITPOS (*fp
)
12558 + anonymous_size
* bits_per_byte
12559 - bit_offset
- FIELD_BITSIZE (*fp
)));
12563 /* Get name of field. */
12564 fieldname
= dwarf2_name (die
, cu
);
12565 if (fieldname
== NULL
)
12568 /* The name is already allocated along with this objfile, so we don't
12569 need to duplicate it for the type. */
12570 fp
->name
= fieldname
;
12572 /* Change accessibility for artificial fields (e.g. virtual table
12573 pointer or virtual base class pointer) to private. */
12574 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
12576 FIELD_ARTIFICIAL (*fp
) = 1;
12577 new_field
->accessibility
= DW_ACCESS_private
;
12578 fip
->non_public_fields
= 1;
12581 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
12583 /* C++ static member. */
12585 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
12586 is a declaration, but all versions of G++ as of this writing
12587 (so through at least 3.2.1) incorrectly generate
12588 DW_TAG_variable tags. */
12590 const char *physname
;
12592 /* Get name of field. */
12593 fieldname
= dwarf2_name (die
, cu
);
12594 if (fieldname
== NULL
)
12597 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
12599 /* Only create a symbol if this is an external value.
12600 new_symbol checks this and puts the value in the global symbol
12601 table, which we want. If it is not external, new_symbol
12602 will try to put the value in cu->list_in_scope which is wrong. */
12603 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
12605 /* A static const member, not much different than an enum as far as
12606 we're concerned, except that we can support more types. */
12607 new_symbol (die
, NULL
, cu
);
12610 /* Get physical name. */
12611 physname
= dwarf2_physname (fieldname
, die
, cu
);
12613 /* The name is already allocated along with this objfile, so we don't
12614 need to duplicate it for the type. */
12615 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
12616 FIELD_TYPE (*fp
) = die_type (die
, cu
);
12617 FIELD_NAME (*fp
) = fieldname
;
12619 else if (die
->tag
== DW_TAG_inheritance
)
12623 /* C++ base class field. */
12624 if (handle_data_member_location (die
, cu
, &offset
))
12625 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
12626 FIELD_BITSIZE (*fp
) = 0;
12627 FIELD_TYPE (*fp
) = die_type (die
, cu
);
12628 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
12629 fip
->nbaseclasses
++;
12633 /* Add a typedef defined in the scope of the FIP's class. */
12636 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
12637 struct dwarf2_cu
*cu
)
12639 struct typedef_field_list
*new_field
;
12640 struct typedef_field
*fp
;
12642 /* Allocate a new field list entry and link it in. */
12643 new_field
= XCNEW (struct typedef_field_list
);
12644 make_cleanup (xfree
, new_field
);
12646 gdb_assert (die
->tag
== DW_TAG_typedef
);
12648 fp
= &new_field
->field
;
12650 /* Get name of field. */
12651 fp
->name
= dwarf2_name (die
, cu
);
12652 if (fp
->name
== NULL
)
12655 fp
->type
= read_type_die (die
, cu
);
12657 new_field
->next
= fip
->typedef_field_list
;
12658 fip
->typedef_field_list
= new_field
;
12659 fip
->typedef_field_list_count
++;
12662 /* Create the vector of fields, and attach it to the type. */
12665 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
12666 struct dwarf2_cu
*cu
)
12668 int nfields
= fip
->nfields
;
12670 /* Record the field count, allocate space for the array of fields,
12671 and create blank accessibility bitfields if necessary. */
12672 TYPE_NFIELDS (type
) = nfields
;
12673 TYPE_FIELDS (type
) = (struct field
*)
12674 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
12675 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
12677 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
12679 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12681 TYPE_FIELD_PRIVATE_BITS (type
) =
12682 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12683 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
12685 TYPE_FIELD_PROTECTED_BITS (type
) =
12686 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12687 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
12689 TYPE_FIELD_IGNORE_BITS (type
) =
12690 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12691 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
12694 /* If the type has baseclasses, allocate and clear a bit vector for
12695 TYPE_FIELD_VIRTUAL_BITS. */
12696 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
12698 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
12699 unsigned char *pointer
;
12701 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12702 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
12703 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
12704 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
12705 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
12708 /* Copy the saved-up fields into the field vector. Start from the head of
12709 the list, adding to the tail of the field array, so that they end up in
12710 the same order in the array in which they were added to the list. */
12711 while (nfields
-- > 0)
12713 struct nextfield
*fieldp
;
12717 fieldp
= fip
->fields
;
12718 fip
->fields
= fieldp
->next
;
12722 fieldp
= fip
->baseclasses
;
12723 fip
->baseclasses
= fieldp
->next
;
12726 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
12727 switch (fieldp
->accessibility
)
12729 case DW_ACCESS_private
:
12730 if (cu
->language
!= language_ada
)
12731 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
12734 case DW_ACCESS_protected
:
12735 if (cu
->language
!= language_ada
)
12736 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
12739 case DW_ACCESS_public
:
12743 /* Unknown accessibility. Complain and treat it as public. */
12745 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
12746 fieldp
->accessibility
);
12750 if (nfields
< fip
->nbaseclasses
)
12752 switch (fieldp
->virtuality
)
12754 case DW_VIRTUALITY_virtual
:
12755 case DW_VIRTUALITY_pure_virtual
:
12756 if (cu
->language
== language_ada
)
12757 error (_("unexpected virtuality in component of Ada type"));
12758 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
12765 /* Return true if this member function is a constructor, false
12769 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
12771 const char *fieldname
;
12772 const char *type_name
;
12775 if (die
->parent
== NULL
)
12778 if (die
->parent
->tag
!= DW_TAG_structure_type
12779 && die
->parent
->tag
!= DW_TAG_union_type
12780 && die
->parent
->tag
!= DW_TAG_class_type
)
12783 fieldname
= dwarf2_name (die
, cu
);
12784 type_name
= dwarf2_name (die
->parent
, cu
);
12785 if (fieldname
== NULL
|| type_name
== NULL
)
12788 len
= strlen (fieldname
);
12789 return (strncmp (fieldname
, type_name
, len
) == 0
12790 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
12793 /* Add a member function to the proper fieldlist. */
12796 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
12797 struct type
*type
, struct dwarf2_cu
*cu
)
12799 struct objfile
*objfile
= cu
->objfile
;
12800 struct attribute
*attr
;
12801 struct fnfieldlist
*flp
;
12803 struct fn_field
*fnp
;
12804 const char *fieldname
;
12805 struct nextfnfield
*new_fnfield
;
12806 struct type
*this_type
;
12807 enum dwarf_access_attribute accessibility
;
12809 if (cu
->language
== language_ada
)
12810 error (_("unexpected member function in Ada type"));
12812 /* Get name of member function. */
12813 fieldname
= dwarf2_name (die
, cu
);
12814 if (fieldname
== NULL
)
12817 /* Look up member function name in fieldlist. */
12818 for (i
= 0; i
< fip
->nfnfields
; i
++)
12820 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
12824 /* Create new list element if necessary. */
12825 if (i
< fip
->nfnfields
)
12826 flp
= &fip
->fnfieldlists
[i
];
12829 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
12831 fip
->fnfieldlists
= (struct fnfieldlist
*)
12832 xrealloc (fip
->fnfieldlists
,
12833 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
12834 * sizeof (struct fnfieldlist
));
12835 if (fip
->nfnfields
== 0)
12836 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
12838 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
12839 flp
->name
= fieldname
;
12842 i
= fip
->nfnfields
++;
12845 /* Create a new member function field and chain it to the field list
12847 new_fnfield
= XNEW (struct nextfnfield
);
12848 make_cleanup (xfree
, new_fnfield
);
12849 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
12850 new_fnfield
->next
= flp
->head
;
12851 flp
->head
= new_fnfield
;
12854 /* Fill in the member function field info. */
12855 fnp
= &new_fnfield
->fnfield
;
12857 /* Delay processing of the physname until later. */
12858 if (cu
->language
== language_cplus
|| cu
->language
== language_java
)
12860 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
12865 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
12866 fnp
->physname
= physname
? physname
: "";
12869 fnp
->type
= alloc_type (objfile
);
12870 this_type
= read_type_die (die
, cu
);
12871 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
12873 int nparams
= TYPE_NFIELDS (this_type
);
12875 /* TYPE is the domain of this method, and THIS_TYPE is the type
12876 of the method itself (TYPE_CODE_METHOD). */
12877 smash_to_method_type (fnp
->type
, type
,
12878 TYPE_TARGET_TYPE (this_type
),
12879 TYPE_FIELDS (this_type
),
12880 TYPE_NFIELDS (this_type
),
12881 TYPE_VARARGS (this_type
));
12883 /* Handle static member functions.
12884 Dwarf2 has no clean way to discern C++ static and non-static
12885 member functions. G++ helps GDB by marking the first
12886 parameter for non-static member functions (which is the this
12887 pointer) as artificial. We obtain this information from
12888 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
12889 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
12890 fnp
->voffset
= VOFFSET_STATIC
;
12893 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
12894 dwarf2_full_name (fieldname
, die
, cu
));
12896 /* Get fcontext from DW_AT_containing_type if present. */
12897 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
12898 fnp
->fcontext
= die_containing_type (die
, cu
);
12900 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
12901 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
12903 /* Get accessibility. */
12904 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
12906 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
12908 accessibility
= dwarf2_default_access_attribute (die
, cu
);
12909 switch (accessibility
)
12911 case DW_ACCESS_private
:
12912 fnp
->is_private
= 1;
12914 case DW_ACCESS_protected
:
12915 fnp
->is_protected
= 1;
12919 /* Check for artificial methods. */
12920 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
12921 if (attr
&& DW_UNSND (attr
) != 0)
12922 fnp
->is_artificial
= 1;
12924 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
12926 /* Get index in virtual function table if it is a virtual member
12927 function. For older versions of GCC, this is an offset in the
12928 appropriate virtual table, as specified by DW_AT_containing_type.
12929 For everyone else, it is an expression to be evaluated relative
12930 to the object address. */
12932 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
12935 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
12937 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
12939 /* Old-style GCC. */
12940 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
12942 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
12943 || (DW_BLOCK (attr
)->size
> 1
12944 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
12945 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
12947 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12948 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
12949 dwarf2_complex_location_expr_complaint ();
12951 fnp
->voffset
/= cu
->header
.addr_size
;
12955 dwarf2_complex_location_expr_complaint ();
12957 if (!fnp
->fcontext
)
12959 /* If there is no `this' field and no DW_AT_containing_type,
12960 we cannot actually find a base class context for the
12962 if (TYPE_NFIELDS (this_type
) == 0
12963 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
12965 complaint (&symfile_complaints
,
12966 _("cannot determine context for virtual member "
12967 "function \"%s\" (offset %d)"),
12968 fieldname
, die
->offset
.sect_off
);
12973 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
12977 else if (attr_form_is_section_offset (attr
))
12979 dwarf2_complex_location_expr_complaint ();
12983 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
12989 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
12990 if (attr
&& DW_UNSND (attr
))
12992 /* GCC does this, as of 2008-08-25; PR debug/37237. */
12993 complaint (&symfile_complaints
,
12994 _("Member function \"%s\" (offset %d) is virtual "
12995 "but the vtable offset is not specified"),
12996 fieldname
, die
->offset
.sect_off
);
12997 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12998 TYPE_CPLUS_DYNAMIC (type
) = 1;
13003 /* Create the vector of member function fields, and attach it to the type. */
13006 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
13007 struct dwarf2_cu
*cu
)
13009 struct fnfieldlist
*flp
;
13012 if (cu
->language
== language_ada
)
13013 error (_("unexpected member functions in Ada type"));
13015 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13016 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
13017 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
13019 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
13021 struct nextfnfield
*nfp
= flp
->head
;
13022 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
13025 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
13026 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
13027 fn_flp
->fn_fields
= (struct fn_field
*)
13028 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
13029 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
13030 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
13033 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
13036 /* Returns non-zero if NAME is the name of a vtable member in CU's
13037 language, zero otherwise. */
13039 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
13041 static const char vptr
[] = "_vptr";
13042 static const char vtable
[] = "vtable";
13044 /* Look for the C++ and Java forms of the vtable. */
13045 if ((cu
->language
== language_java
13046 && startswith (name
, vtable
))
13047 || (startswith (name
, vptr
)
13048 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
13054 /* GCC outputs unnamed structures that are really pointers to member
13055 functions, with the ABI-specified layout. If TYPE describes
13056 such a structure, smash it into a member function type.
13058 GCC shouldn't do this; it should just output pointer to member DIEs.
13059 This is GCC PR debug/28767. */
13062 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
13064 struct type
*pfn_type
, *self_type
, *new_type
;
13066 /* Check for a structure with no name and two children. */
13067 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
13070 /* Check for __pfn and __delta members. */
13071 if (TYPE_FIELD_NAME (type
, 0) == NULL
13072 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
13073 || TYPE_FIELD_NAME (type
, 1) == NULL
13074 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
13077 /* Find the type of the method. */
13078 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
13079 if (pfn_type
== NULL
13080 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
13081 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
13084 /* Look for the "this" argument. */
13085 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
13086 if (TYPE_NFIELDS (pfn_type
) == 0
13087 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
13088 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
13091 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
13092 new_type
= alloc_type (objfile
);
13093 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
13094 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
13095 TYPE_VARARGS (pfn_type
));
13096 smash_to_methodptr_type (type
, new_type
);
13099 /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler
13103 producer_is_icc (struct dwarf2_cu
*cu
)
13105 if (!cu
->checked_producer
)
13106 check_producer (cu
);
13108 return cu
->producer_is_icc
;
13111 /* Called when we find the DIE that starts a structure or union scope
13112 (definition) to create a type for the structure or union. Fill in
13113 the type's name and general properties; the members will not be
13114 processed until process_structure_scope. A symbol table entry for
13115 the type will also not be done until process_structure_scope (assuming
13116 the type has a name).
13118 NOTE: we need to call these functions regardless of whether or not the
13119 DIE has a DW_AT_name attribute, since it might be an anonymous
13120 structure or union. This gets the type entered into our set of
13121 user defined types. */
13123 static struct type
*
13124 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13126 struct objfile
*objfile
= cu
->objfile
;
13128 struct attribute
*attr
;
13131 /* If the definition of this type lives in .debug_types, read that type.
13132 Don't follow DW_AT_specification though, that will take us back up
13133 the chain and we want to go down. */
13134 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
13137 type
= get_DW_AT_signature_type (die
, attr
, cu
);
13139 /* The type's CU may not be the same as CU.
13140 Ensure TYPE is recorded with CU in die_type_hash. */
13141 return set_die_type (die
, type
, cu
);
13144 type
= alloc_type (objfile
);
13145 INIT_CPLUS_SPECIFIC (type
);
13147 name
= dwarf2_name (die
, cu
);
13150 if (cu
->language
== language_cplus
13151 || cu
->language
== language_java
13152 || cu
->language
== language_d
13153 || cu
->language
== language_rust
)
13155 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
13157 /* dwarf2_full_name might have already finished building the DIE's
13158 type. If so, there is no need to continue. */
13159 if (get_die_type (die
, cu
) != NULL
)
13160 return get_die_type (die
, cu
);
13162 TYPE_TAG_NAME (type
) = full_name
;
13163 if (die
->tag
== DW_TAG_structure_type
13164 || die
->tag
== DW_TAG_class_type
)
13165 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
13169 /* The name is already allocated along with this objfile, so
13170 we don't need to duplicate it for the type. */
13171 TYPE_TAG_NAME (type
) = name
;
13172 if (die
->tag
== DW_TAG_class_type
)
13173 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
13177 if (die
->tag
== DW_TAG_structure_type
)
13179 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13181 else if (die
->tag
== DW_TAG_union_type
)
13183 TYPE_CODE (type
) = TYPE_CODE_UNION
;
13187 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13190 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
13191 TYPE_DECLARED_CLASS (type
) = 1;
13193 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13196 if (attr_form_is_constant (attr
))
13197 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13200 /* For the moment, dynamic type sizes are not supported
13201 by GDB's struct type. The actual size is determined
13202 on-demand when resolving the type of a given object,
13203 so set the type's length to zero for now. Otherwise,
13204 we record an expression as the length, and that expression
13205 could lead to a very large value, which could eventually
13206 lead to us trying to allocate that much memory when creating
13207 a value of that type. */
13208 TYPE_LENGTH (type
) = 0;
13213 TYPE_LENGTH (type
) = 0;
13216 if (producer_is_icc (cu
) && (TYPE_LENGTH (type
) == 0))
13218 /* ICC does not output the required DW_AT_declaration
13219 on incomplete types, but gives them a size of zero. */
13220 TYPE_STUB (type
) = 1;
13223 TYPE_STUB_SUPPORTED (type
) = 1;
13225 if (die_is_declaration (die
, cu
))
13226 TYPE_STUB (type
) = 1;
13227 else if (attr
== NULL
&& die
->child
== NULL
13228 && producer_is_realview (cu
->producer
))
13229 /* RealView does not output the required DW_AT_declaration
13230 on incomplete types. */
13231 TYPE_STUB (type
) = 1;
13233 /* We need to add the type field to the die immediately so we don't
13234 infinitely recurse when dealing with pointers to the structure
13235 type within the structure itself. */
13236 set_die_type (die
, type
, cu
);
13238 /* set_die_type should be already done. */
13239 set_descriptive_type (type
, die
, cu
);
13244 /* Finish creating a structure or union type, including filling in
13245 its members and creating a symbol for it. */
13248 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13250 struct objfile
*objfile
= cu
->objfile
;
13251 struct die_info
*child_die
;
13254 type
= get_die_type (die
, cu
);
13256 type
= read_structure_type (die
, cu
);
13258 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
13260 struct field_info fi
;
13261 VEC (symbolp
) *template_args
= NULL
;
13262 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
13264 memset (&fi
, 0, sizeof (struct field_info
));
13266 child_die
= die
->child
;
13268 while (child_die
&& child_die
->tag
)
13270 if (child_die
->tag
== DW_TAG_member
13271 || child_die
->tag
== DW_TAG_variable
)
13273 /* NOTE: carlton/2002-11-05: A C++ static data member
13274 should be a DW_TAG_member that is a declaration, but
13275 all versions of G++ as of this writing (so through at
13276 least 3.2.1) incorrectly generate DW_TAG_variable
13277 tags for them instead. */
13278 dwarf2_add_field (&fi
, child_die
, cu
);
13280 else if (child_die
->tag
== DW_TAG_subprogram
)
13282 /* C++ member function. */
13283 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
13285 else if (child_die
->tag
== DW_TAG_inheritance
)
13287 /* C++ base class field. */
13288 dwarf2_add_field (&fi
, child_die
, cu
);
13290 else if (child_die
->tag
== DW_TAG_typedef
)
13291 dwarf2_add_typedef (&fi
, child_die
, cu
);
13292 else if (child_die
->tag
== DW_TAG_template_type_param
13293 || child_die
->tag
== DW_TAG_template_value_param
)
13295 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13298 VEC_safe_push (symbolp
, template_args
, arg
);
13301 child_die
= sibling_die (child_die
);
13304 /* Attach template arguments to type. */
13305 if (! VEC_empty (symbolp
, template_args
))
13307 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13308 TYPE_N_TEMPLATE_ARGUMENTS (type
)
13309 = VEC_length (symbolp
, template_args
);
13310 TYPE_TEMPLATE_ARGUMENTS (type
)
13311 = XOBNEWVEC (&objfile
->objfile_obstack
,
13313 TYPE_N_TEMPLATE_ARGUMENTS (type
));
13314 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
13315 VEC_address (symbolp
, template_args
),
13316 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
13317 * sizeof (struct symbol
*)));
13318 VEC_free (symbolp
, template_args
);
13321 /* Attach fields and member functions to the type. */
13323 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
13326 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
13328 /* Get the type which refers to the base class (possibly this
13329 class itself) which contains the vtable pointer for the current
13330 class from the DW_AT_containing_type attribute. This use of
13331 DW_AT_containing_type is a GNU extension. */
13333 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
13335 struct type
*t
= die_containing_type (die
, cu
);
13337 set_type_vptr_basetype (type
, t
);
13342 /* Our own class provides vtbl ptr. */
13343 for (i
= TYPE_NFIELDS (t
) - 1;
13344 i
>= TYPE_N_BASECLASSES (t
);
13347 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
13349 if (is_vtable_name (fieldname
, cu
))
13351 set_type_vptr_fieldno (type
, i
);
13356 /* Complain if virtual function table field not found. */
13357 if (i
< TYPE_N_BASECLASSES (t
))
13358 complaint (&symfile_complaints
,
13359 _("virtual function table pointer "
13360 "not found when defining class '%s'"),
13361 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
13366 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
13369 else if (cu
->producer
13370 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
13372 /* The IBM XLC compiler does not provide direct indication
13373 of the containing type, but the vtable pointer is
13374 always named __vfp. */
13378 for (i
= TYPE_NFIELDS (type
) - 1;
13379 i
>= TYPE_N_BASECLASSES (type
);
13382 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
13384 set_type_vptr_fieldno (type
, i
);
13385 set_type_vptr_basetype (type
, type
);
13392 /* Copy fi.typedef_field_list linked list elements content into the
13393 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
13394 if (fi
.typedef_field_list
)
13396 int i
= fi
.typedef_field_list_count
;
13398 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13399 TYPE_TYPEDEF_FIELD_ARRAY (type
)
13400 = ((struct typedef_field
*)
13401 TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
));
13402 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
13404 /* Reverse the list order to keep the debug info elements order. */
13407 struct typedef_field
*dest
, *src
;
13409 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
13410 src
= &fi
.typedef_field_list
->field
;
13411 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
13416 do_cleanups (back_to
);
13418 if (HAVE_CPLUS_STRUCT (type
))
13419 TYPE_CPLUS_REALLY_JAVA (type
) = cu
->language
== language_java
;
13422 quirk_gcc_member_function_pointer (type
, objfile
);
13424 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
13425 snapshots) has been known to create a die giving a declaration
13426 for a class that has, as a child, a die giving a definition for a
13427 nested class. So we have to process our children even if the
13428 current die is a declaration. Normally, of course, a declaration
13429 won't have any children at all. */
13431 child_die
= die
->child
;
13433 while (child_die
!= NULL
&& child_die
->tag
)
13435 if (child_die
->tag
== DW_TAG_member
13436 || child_die
->tag
== DW_TAG_variable
13437 || child_die
->tag
== DW_TAG_inheritance
13438 || child_die
->tag
== DW_TAG_template_value_param
13439 || child_die
->tag
== DW_TAG_template_type_param
)
13444 process_die (child_die
, cu
);
13446 child_die
= sibling_die (child_die
);
13449 /* Do not consider external references. According to the DWARF standard,
13450 these DIEs are identified by the fact that they have no byte_size
13451 attribute, and a declaration attribute. */
13452 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
13453 || !die_is_declaration (die
, cu
))
13454 new_symbol (die
, type
, cu
);
13457 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
13458 update TYPE using some information only available in DIE's children. */
13461 update_enumeration_type_from_children (struct die_info
*die
,
13463 struct dwarf2_cu
*cu
)
13465 struct obstack obstack
;
13466 struct die_info
*child_die
;
13467 int unsigned_enum
= 1;
13470 struct cleanup
*old_chain
;
13472 obstack_init (&obstack
);
13473 old_chain
= make_cleanup_obstack_free (&obstack
);
13475 for (child_die
= die
->child
;
13476 child_die
!= NULL
&& child_die
->tag
;
13477 child_die
= sibling_die (child_die
))
13479 struct attribute
*attr
;
13481 const gdb_byte
*bytes
;
13482 struct dwarf2_locexpr_baton
*baton
;
13485 if (child_die
->tag
!= DW_TAG_enumerator
)
13488 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
13492 name
= dwarf2_name (child_die
, cu
);
13494 name
= "<anonymous enumerator>";
13496 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
13497 &value
, &bytes
, &baton
);
13503 else if ((mask
& value
) != 0)
13508 /* If we already know that the enum type is neither unsigned, nor
13509 a flag type, no need to look at the rest of the enumerates. */
13510 if (!unsigned_enum
&& !flag_enum
)
13515 TYPE_UNSIGNED (type
) = 1;
13517 TYPE_FLAG_ENUM (type
) = 1;
13519 do_cleanups (old_chain
);
13522 /* Given a DW_AT_enumeration_type die, set its type. We do not
13523 complete the type's fields yet, or create any symbols. */
13525 static struct type
*
13526 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13528 struct objfile
*objfile
= cu
->objfile
;
13530 struct attribute
*attr
;
13533 /* If the definition of this type lives in .debug_types, read that type.
13534 Don't follow DW_AT_specification though, that will take us back up
13535 the chain and we want to go down. */
13536 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
13539 type
= get_DW_AT_signature_type (die
, attr
, cu
);
13541 /* The type's CU may not be the same as CU.
13542 Ensure TYPE is recorded with CU in die_type_hash. */
13543 return set_die_type (die
, type
, cu
);
13546 type
= alloc_type (objfile
);
13548 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
13549 name
= dwarf2_full_name (NULL
, die
, cu
);
13551 TYPE_TAG_NAME (type
) = name
;
13553 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
13556 struct type
*underlying_type
= die_type (die
, cu
);
13558 TYPE_TARGET_TYPE (type
) = underlying_type
;
13561 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13564 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13568 TYPE_LENGTH (type
) = 0;
13571 /* The enumeration DIE can be incomplete. In Ada, any type can be
13572 declared as private in the package spec, and then defined only
13573 inside the package body. Such types are known as Taft Amendment
13574 Types. When another package uses such a type, an incomplete DIE
13575 may be generated by the compiler. */
13576 if (die_is_declaration (die
, cu
))
13577 TYPE_STUB (type
) = 1;
13579 /* Finish the creation of this type by using the enum's children.
13580 We must call this even when the underlying type has been provided
13581 so that we can determine if we're looking at a "flag" enum. */
13582 update_enumeration_type_from_children (die
, type
, cu
);
13584 /* If this type has an underlying type that is not a stub, then we
13585 may use its attributes. We always use the "unsigned" attribute
13586 in this situation, because ordinarily we guess whether the type
13587 is unsigned -- but the guess can be wrong and the underlying type
13588 can tell us the reality. However, we defer to a local size
13589 attribute if one exists, because this lets the compiler override
13590 the underlying type if needed. */
13591 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
13593 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
13594 if (TYPE_LENGTH (type
) == 0)
13595 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
13598 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
13600 return set_die_type (die
, type
, cu
);
13603 /* Given a pointer to a die which begins an enumeration, process all
13604 the dies that define the members of the enumeration, and create the
13605 symbol for the enumeration type.
13607 NOTE: We reverse the order of the element list. */
13610 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13612 struct type
*this_type
;
13614 this_type
= get_die_type (die
, cu
);
13615 if (this_type
== NULL
)
13616 this_type
= read_enumeration_type (die
, cu
);
13618 if (die
->child
!= NULL
)
13620 struct die_info
*child_die
;
13621 struct symbol
*sym
;
13622 struct field
*fields
= NULL
;
13623 int num_fields
= 0;
13626 child_die
= die
->child
;
13627 while (child_die
&& child_die
->tag
)
13629 if (child_die
->tag
!= DW_TAG_enumerator
)
13631 process_die (child_die
, cu
);
13635 name
= dwarf2_name (child_die
, cu
);
13638 sym
= new_symbol (child_die
, this_type
, cu
);
13640 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
13642 fields
= (struct field
*)
13644 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
13645 * sizeof (struct field
));
13648 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
13649 FIELD_TYPE (fields
[num_fields
]) = NULL
;
13650 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
13651 FIELD_BITSIZE (fields
[num_fields
]) = 0;
13657 child_die
= sibling_die (child_die
);
13662 TYPE_NFIELDS (this_type
) = num_fields
;
13663 TYPE_FIELDS (this_type
) = (struct field
*)
13664 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
13665 memcpy (TYPE_FIELDS (this_type
), fields
,
13666 sizeof (struct field
) * num_fields
);
13671 /* If we are reading an enum from a .debug_types unit, and the enum
13672 is a declaration, and the enum is not the signatured type in the
13673 unit, then we do not want to add a symbol for it. Adding a
13674 symbol would in some cases obscure the true definition of the
13675 enum, giving users an incomplete type when the definition is
13676 actually available. Note that we do not want to do this for all
13677 enums which are just declarations, because C++0x allows forward
13678 enum declarations. */
13679 if (cu
->per_cu
->is_debug_types
13680 && die_is_declaration (die
, cu
))
13682 struct signatured_type
*sig_type
;
13684 sig_type
= (struct signatured_type
*) cu
->per_cu
;
13685 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
13686 if (sig_type
->type_offset_in_section
.sect_off
!= die
->offset
.sect_off
)
13690 new_symbol (die
, this_type
, cu
);
13693 /* Extract all information from a DW_TAG_array_type DIE and put it in
13694 the DIE's type field. For now, this only handles one dimensional
13697 static struct type
*
13698 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13700 struct objfile
*objfile
= cu
->objfile
;
13701 struct die_info
*child_die
;
13703 struct type
*element_type
, *range_type
, *index_type
;
13704 struct type
**range_types
= NULL
;
13705 struct attribute
*attr
;
13707 struct cleanup
*back_to
;
13709 unsigned int bit_stride
= 0;
13711 element_type
= die_type (die
, cu
);
13713 /* The die_type call above may have already set the type for this DIE. */
13714 type
= get_die_type (die
, cu
);
13718 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
13720 bit_stride
= DW_UNSND (attr
) * 8;
13722 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
13724 bit_stride
= DW_UNSND (attr
);
13726 /* Irix 6.2 native cc creates array types without children for
13727 arrays with unspecified length. */
13728 if (die
->child
== NULL
)
13730 index_type
= objfile_type (objfile
)->builtin_int
;
13731 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
13732 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
13734 return set_die_type (die
, type
, cu
);
13737 back_to
= make_cleanup (null_cleanup
, NULL
);
13738 child_die
= die
->child
;
13739 while (child_die
&& child_die
->tag
)
13741 if (child_die
->tag
== DW_TAG_subrange_type
)
13743 struct type
*child_type
= read_type_die (child_die
, cu
);
13745 if (child_type
!= NULL
)
13747 /* The range type was succesfully read. Save it for the
13748 array type creation. */
13749 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
13751 range_types
= (struct type
**)
13752 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
13753 * sizeof (struct type
*));
13755 make_cleanup (free_current_contents
, &range_types
);
13757 range_types
[ndim
++] = child_type
;
13760 child_die
= sibling_die (child_die
);
13763 /* Dwarf2 dimensions are output from left to right, create the
13764 necessary array types in backwards order. */
13766 type
= element_type
;
13768 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
13773 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
13779 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
13783 /* Understand Dwarf2 support for vector types (like they occur on
13784 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
13785 array type. This is not part of the Dwarf2/3 standard yet, but a
13786 custom vendor extension. The main difference between a regular
13787 array and the vector variant is that vectors are passed by value
13789 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
13791 make_vector_type (type
);
13793 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
13794 implementation may choose to implement triple vectors using this
13796 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13799 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
13800 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13802 complaint (&symfile_complaints
,
13803 _("DW_AT_byte_size for array type smaller "
13804 "than the total size of elements"));
13807 name
= dwarf2_name (die
, cu
);
13809 TYPE_NAME (type
) = name
;
13811 /* Install the type in the die. */
13812 set_die_type (die
, type
, cu
);
13814 /* set_die_type should be already done. */
13815 set_descriptive_type (type
, die
, cu
);
13817 do_cleanups (back_to
);
13822 static enum dwarf_array_dim_ordering
13823 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
13825 struct attribute
*attr
;
13827 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
13830 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
13832 /* GNU F77 is a special case, as at 08/2004 array type info is the
13833 opposite order to the dwarf2 specification, but data is still
13834 laid out as per normal fortran.
13836 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
13837 version checking. */
13839 if (cu
->language
== language_fortran
13840 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
13842 return DW_ORD_row_major
;
13845 switch (cu
->language_defn
->la_array_ordering
)
13847 case array_column_major
:
13848 return DW_ORD_col_major
;
13849 case array_row_major
:
13851 return DW_ORD_row_major
;
13855 /* Extract all information from a DW_TAG_set_type DIE and put it in
13856 the DIE's type field. */
13858 static struct type
*
13859 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13861 struct type
*domain_type
, *set_type
;
13862 struct attribute
*attr
;
13864 domain_type
= die_type (die
, cu
);
13866 /* The die_type call above may have already set the type for this DIE. */
13867 set_type
= get_die_type (die
, cu
);
13871 set_type
= create_set_type (NULL
, domain_type
);
13873 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13875 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
13877 return set_die_type (die
, set_type
, cu
);
13880 /* A helper for read_common_block that creates a locexpr baton.
13881 SYM is the symbol which we are marking as computed.
13882 COMMON_DIE is the DIE for the common block.
13883 COMMON_LOC is the location expression attribute for the common
13885 MEMBER_LOC is the location expression attribute for the particular
13886 member of the common block that we are processing.
13887 CU is the CU from which the above come. */
13890 mark_common_block_symbol_computed (struct symbol
*sym
,
13891 struct die_info
*common_die
,
13892 struct attribute
*common_loc
,
13893 struct attribute
*member_loc
,
13894 struct dwarf2_cu
*cu
)
13896 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13897 struct dwarf2_locexpr_baton
*baton
;
13899 unsigned int cu_off
;
13900 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
13901 LONGEST offset
= 0;
13903 gdb_assert (common_loc
&& member_loc
);
13904 gdb_assert (attr_form_is_block (common_loc
));
13905 gdb_assert (attr_form_is_block (member_loc
)
13906 || attr_form_is_constant (member_loc
));
13908 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
13909 baton
->per_cu
= cu
->per_cu
;
13910 gdb_assert (baton
->per_cu
);
13912 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
13914 if (attr_form_is_constant (member_loc
))
13916 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
13917 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
13920 baton
->size
+= DW_BLOCK (member_loc
)->size
;
13922 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
13925 *ptr
++ = DW_OP_call4
;
13926 cu_off
= common_die
->offset
.sect_off
- cu
->per_cu
->offset
.sect_off
;
13927 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
13930 if (attr_form_is_constant (member_loc
))
13932 *ptr
++ = DW_OP_addr
;
13933 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
13934 ptr
+= cu
->header
.addr_size
;
13938 /* We have to copy the data here, because DW_OP_call4 will only
13939 use a DW_AT_location attribute. */
13940 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
13941 ptr
+= DW_BLOCK (member_loc
)->size
;
13944 *ptr
++ = DW_OP_plus
;
13945 gdb_assert (ptr
- baton
->data
== baton
->size
);
13947 SYMBOL_LOCATION_BATON (sym
) = baton
;
13948 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
13951 /* Create appropriate locally-scoped variables for all the
13952 DW_TAG_common_block entries. Also create a struct common_block
13953 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
13954 is used to sepate the common blocks name namespace from regular
13958 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
13960 struct attribute
*attr
;
13962 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
13965 /* Support the .debug_loc offsets. */
13966 if (attr_form_is_block (attr
))
13970 else if (attr_form_is_section_offset (attr
))
13972 dwarf2_complex_location_expr_complaint ();
13977 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
13978 "common block member");
13983 if (die
->child
!= NULL
)
13985 struct objfile
*objfile
= cu
->objfile
;
13986 struct die_info
*child_die
;
13987 size_t n_entries
= 0, size
;
13988 struct common_block
*common_block
;
13989 struct symbol
*sym
;
13991 for (child_die
= die
->child
;
13992 child_die
&& child_die
->tag
;
13993 child_die
= sibling_die (child_die
))
13996 size
= (sizeof (struct common_block
)
13997 + (n_entries
- 1) * sizeof (struct symbol
*));
13999 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
14001 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
14002 common_block
->n_entries
= 0;
14004 for (child_die
= die
->child
;
14005 child_die
&& child_die
->tag
;
14006 child_die
= sibling_die (child_die
))
14008 /* Create the symbol in the DW_TAG_common_block block in the current
14010 sym
= new_symbol (child_die
, NULL
, cu
);
14013 struct attribute
*member_loc
;
14015 common_block
->contents
[common_block
->n_entries
++] = sym
;
14017 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
14021 /* GDB has handled this for a long time, but it is
14022 not specified by DWARF. It seems to have been
14023 emitted by gfortran at least as recently as:
14024 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
14025 complaint (&symfile_complaints
,
14026 _("Variable in common block has "
14027 "DW_AT_data_member_location "
14028 "- DIE at 0x%x [in module %s]"),
14029 child_die
->offset
.sect_off
,
14030 objfile_name (cu
->objfile
));
14032 if (attr_form_is_section_offset (member_loc
))
14033 dwarf2_complex_location_expr_complaint ();
14034 else if (attr_form_is_constant (member_loc
)
14035 || attr_form_is_block (member_loc
))
14038 mark_common_block_symbol_computed (sym
, die
, attr
,
14042 dwarf2_complex_location_expr_complaint ();
14047 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
14048 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
14052 /* Create a type for a C++ namespace. */
14054 static struct type
*
14055 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14057 struct objfile
*objfile
= cu
->objfile
;
14058 const char *previous_prefix
, *name
;
14062 /* For extensions, reuse the type of the original namespace. */
14063 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
14065 struct die_info
*ext_die
;
14066 struct dwarf2_cu
*ext_cu
= cu
;
14068 ext_die
= dwarf2_extension (die
, &ext_cu
);
14069 type
= read_type_die (ext_die
, ext_cu
);
14071 /* EXT_CU may not be the same as CU.
14072 Ensure TYPE is recorded with CU in die_type_hash. */
14073 return set_die_type (die
, type
, cu
);
14076 name
= namespace_name (die
, &is_anonymous
, cu
);
14078 /* Now build the name of the current namespace. */
14080 previous_prefix
= determine_prefix (die
, cu
);
14081 if (previous_prefix
[0] != '\0')
14082 name
= typename_concat (&objfile
->objfile_obstack
,
14083 previous_prefix
, name
, 0, cu
);
14085 /* Create the type. */
14086 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
14088 TYPE_NAME (type
) = name
;
14089 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
14091 return set_die_type (die
, type
, cu
);
14094 /* Read a namespace scope. */
14097 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
14099 struct objfile
*objfile
= cu
->objfile
;
14102 /* Add a symbol associated to this if we haven't seen the namespace
14103 before. Also, add a using directive if it's an anonymous
14106 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
14110 type
= read_type_die (die
, cu
);
14111 new_symbol (die
, type
, cu
);
14113 namespace_name (die
, &is_anonymous
, cu
);
14116 const char *previous_prefix
= determine_prefix (die
, cu
);
14118 add_using_directive (using_directives (cu
->language
),
14119 previous_prefix
, TYPE_NAME (type
), NULL
,
14120 NULL
, NULL
, 0, &objfile
->objfile_obstack
);
14124 if (die
->child
!= NULL
)
14126 struct die_info
*child_die
= die
->child
;
14128 while (child_die
&& child_die
->tag
)
14130 process_die (child_die
, cu
);
14131 child_die
= sibling_die (child_die
);
14136 /* Read a Fortran module as type. This DIE can be only a declaration used for
14137 imported module. Still we need that type as local Fortran "use ... only"
14138 declaration imports depend on the created type in determine_prefix. */
14140 static struct type
*
14141 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14143 struct objfile
*objfile
= cu
->objfile
;
14144 const char *module_name
;
14147 module_name
= dwarf2_name (die
, cu
);
14149 complaint (&symfile_complaints
,
14150 _("DW_TAG_module has no name, offset 0x%x"),
14151 die
->offset
.sect_off
);
14152 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
14154 /* determine_prefix uses TYPE_TAG_NAME. */
14155 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
14157 return set_die_type (die
, type
, cu
);
14160 /* Read a Fortran module. */
14163 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
14165 struct die_info
*child_die
= die
->child
;
14168 type
= read_type_die (die
, cu
);
14169 new_symbol (die
, type
, cu
);
14171 while (child_die
&& child_die
->tag
)
14173 process_die (child_die
, cu
);
14174 child_die
= sibling_die (child_die
);
14178 /* Return the name of the namespace represented by DIE. Set
14179 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
14182 static const char *
14183 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
14185 struct die_info
*current_die
;
14186 const char *name
= NULL
;
14188 /* Loop through the extensions until we find a name. */
14190 for (current_die
= die
;
14191 current_die
!= NULL
;
14192 current_die
= dwarf2_extension (die
, &cu
))
14194 /* We don't use dwarf2_name here so that we can detect the absence
14195 of a name -> anonymous namespace. */
14196 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
14202 /* Is it an anonymous namespace? */
14204 *is_anonymous
= (name
== NULL
);
14206 name
= CP_ANONYMOUS_NAMESPACE_STR
;
14211 /* Extract all information from a DW_TAG_pointer_type DIE and add to
14212 the user defined type vector. */
14214 static struct type
*
14215 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14217 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
14218 struct comp_unit_head
*cu_header
= &cu
->header
;
14220 struct attribute
*attr_byte_size
;
14221 struct attribute
*attr_address_class
;
14222 int byte_size
, addr_class
;
14223 struct type
*target_type
;
14225 target_type
= die_type (die
, cu
);
14227 /* The die_type call above may have already set the type for this DIE. */
14228 type
= get_die_type (die
, cu
);
14232 type
= lookup_pointer_type (target_type
);
14234 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14235 if (attr_byte_size
)
14236 byte_size
= DW_UNSND (attr_byte_size
);
14238 byte_size
= cu_header
->addr_size
;
14240 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
14241 if (attr_address_class
)
14242 addr_class
= DW_UNSND (attr_address_class
);
14244 addr_class
= DW_ADDR_none
;
14246 /* If the pointer size or address class is different than the
14247 default, create a type variant marked as such and set the
14248 length accordingly. */
14249 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
14251 if (gdbarch_address_class_type_flags_p (gdbarch
))
14255 type_flags
= gdbarch_address_class_type_flags
14256 (gdbarch
, byte_size
, addr_class
);
14257 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
14259 type
= make_type_with_address_space (type
, type_flags
);
14261 else if (TYPE_LENGTH (type
) != byte_size
)
14263 complaint (&symfile_complaints
,
14264 _("invalid pointer size %d"), byte_size
);
14268 /* Should we also complain about unhandled address classes? */
14272 TYPE_LENGTH (type
) = byte_size
;
14273 return set_die_type (die
, type
, cu
);
14276 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
14277 the user defined type vector. */
14279 static struct type
*
14280 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14283 struct type
*to_type
;
14284 struct type
*domain
;
14286 to_type
= die_type (die
, cu
);
14287 domain
= die_containing_type (die
, cu
);
14289 /* The calls above may have already set the type for this DIE. */
14290 type
= get_die_type (die
, cu
);
14294 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
14295 type
= lookup_methodptr_type (to_type
);
14296 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
14298 struct type
*new_type
= alloc_type (cu
->objfile
);
14300 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
14301 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
14302 TYPE_VARARGS (to_type
));
14303 type
= lookup_methodptr_type (new_type
);
14306 type
= lookup_memberptr_type (to_type
, domain
);
14308 return set_die_type (die
, type
, cu
);
14311 /* Extract all information from a DW_TAG_reference_type DIE and add to
14312 the user defined type vector. */
14314 static struct type
*
14315 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14317 struct comp_unit_head
*cu_header
= &cu
->header
;
14318 struct type
*type
, *target_type
;
14319 struct attribute
*attr
;
14321 target_type
= die_type (die
, cu
);
14323 /* The die_type call above may have already set the type for this DIE. */
14324 type
= get_die_type (die
, cu
);
14328 type
= lookup_reference_type (target_type
);
14329 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14332 TYPE_LENGTH (type
) = DW_UNSND (attr
);
14336 TYPE_LENGTH (type
) = cu_header
->addr_size
;
14338 return set_die_type (die
, type
, cu
);
14341 /* Add the given cv-qualifiers to the element type of the array. GCC
14342 outputs DWARF type qualifiers that apply to an array, not the
14343 element type. But GDB relies on the array element type to carry
14344 the cv-qualifiers. This mimics section 6.7.3 of the C99
14347 static struct type
*
14348 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
14349 struct type
*base_type
, int cnst
, int voltl
)
14351 struct type
*el_type
, *inner_array
;
14353 base_type
= copy_type (base_type
);
14354 inner_array
= base_type
;
14356 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
14358 TYPE_TARGET_TYPE (inner_array
) =
14359 copy_type (TYPE_TARGET_TYPE (inner_array
));
14360 inner_array
= TYPE_TARGET_TYPE (inner_array
);
14363 el_type
= TYPE_TARGET_TYPE (inner_array
);
14364 cnst
|= TYPE_CONST (el_type
);
14365 voltl
|= TYPE_VOLATILE (el_type
);
14366 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
14368 return set_die_type (die
, base_type
, cu
);
14371 static struct type
*
14372 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14374 struct type
*base_type
, *cv_type
;
14376 base_type
= die_type (die
, cu
);
14378 /* The die_type call above may have already set the type for this DIE. */
14379 cv_type
= get_die_type (die
, cu
);
14383 /* In case the const qualifier is applied to an array type, the element type
14384 is so qualified, not the array type (section 6.7.3 of C99). */
14385 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14386 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
14388 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
14389 return set_die_type (die
, cv_type
, cu
);
14392 static struct type
*
14393 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14395 struct type
*base_type
, *cv_type
;
14397 base_type
= die_type (die
, cu
);
14399 /* The die_type call above may have already set the type for this DIE. */
14400 cv_type
= get_die_type (die
, cu
);
14404 /* In case the volatile qualifier is applied to an array type, the
14405 element type is so qualified, not the array type (section 6.7.3
14407 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14408 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
14410 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
14411 return set_die_type (die
, cv_type
, cu
);
14414 /* Handle DW_TAG_restrict_type. */
14416 static struct type
*
14417 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14419 struct type
*base_type
, *cv_type
;
14421 base_type
= die_type (die
, cu
);
14423 /* The die_type call above may have already set the type for this DIE. */
14424 cv_type
= get_die_type (die
, cu
);
14428 cv_type
= make_restrict_type (base_type
);
14429 return set_die_type (die
, cv_type
, cu
);
14432 /* Handle DW_TAG_atomic_type. */
14434 static struct type
*
14435 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14437 struct type
*base_type
, *cv_type
;
14439 base_type
= die_type (die
, cu
);
14441 /* The die_type call above may have already set the type for this DIE. */
14442 cv_type
= get_die_type (die
, cu
);
14446 cv_type
= make_atomic_type (base_type
);
14447 return set_die_type (die
, cv_type
, cu
);
14450 /* Extract all information from a DW_TAG_string_type DIE and add to
14451 the user defined type vector. It isn't really a user defined type,
14452 but it behaves like one, with other DIE's using an AT_user_def_type
14453 attribute to reference it. */
14455 static struct type
*
14456 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14458 struct objfile
*objfile
= cu
->objfile
;
14459 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14460 struct type
*type
, *range_type
, *index_type
, *char_type
;
14461 struct attribute
*attr
;
14462 unsigned int length
;
14464 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
14467 length
= DW_UNSND (attr
);
14471 /* Check for the DW_AT_byte_size attribute. */
14472 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14475 length
= DW_UNSND (attr
);
14483 index_type
= objfile_type (objfile
)->builtin_int
;
14484 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
14485 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
14486 type
= create_string_type (NULL
, char_type
, range_type
);
14488 return set_die_type (die
, type
, cu
);
14491 /* Assuming that DIE corresponds to a function, returns nonzero
14492 if the function is prototyped. */
14495 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
14497 struct attribute
*attr
;
14499 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
14500 if (attr
&& (DW_UNSND (attr
) != 0))
14503 /* The DWARF standard implies that the DW_AT_prototyped attribute
14504 is only meaninful for C, but the concept also extends to other
14505 languages that allow unprototyped functions (Eg: Objective C).
14506 For all other languages, assume that functions are always
14508 if (cu
->language
!= language_c
14509 && cu
->language
!= language_objc
14510 && cu
->language
!= language_opencl
)
14513 /* RealView does not emit DW_AT_prototyped. We can not distinguish
14514 prototyped and unprototyped functions; default to prototyped,
14515 since that is more common in modern code (and RealView warns
14516 about unprototyped functions). */
14517 if (producer_is_realview (cu
->producer
))
14523 /* Handle DIES due to C code like:
14527 int (*funcp)(int a, long l);
14531 ('funcp' generates a DW_TAG_subroutine_type DIE). */
14533 static struct type
*
14534 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14536 struct objfile
*objfile
= cu
->objfile
;
14537 struct type
*type
; /* Type that this function returns. */
14538 struct type
*ftype
; /* Function that returns above type. */
14539 struct attribute
*attr
;
14541 type
= die_type (die
, cu
);
14543 /* The die_type call above may have already set the type for this DIE. */
14544 ftype
= get_die_type (die
, cu
);
14548 ftype
= lookup_function_type (type
);
14550 if (prototyped_function_p (die
, cu
))
14551 TYPE_PROTOTYPED (ftype
) = 1;
14553 /* Store the calling convention in the type if it's available in
14554 the subroutine die. Otherwise set the calling convention to
14555 the default value DW_CC_normal. */
14556 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
14558 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
14559 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
14560 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
14562 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
14564 /* Record whether the function returns normally to its caller or not
14565 if the DWARF producer set that information. */
14566 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
14567 if (attr
&& (DW_UNSND (attr
) != 0))
14568 TYPE_NO_RETURN (ftype
) = 1;
14570 /* We need to add the subroutine type to the die immediately so
14571 we don't infinitely recurse when dealing with parameters
14572 declared as the same subroutine type. */
14573 set_die_type (die
, ftype
, cu
);
14575 if (die
->child
!= NULL
)
14577 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
14578 struct die_info
*child_die
;
14579 int nparams
, iparams
;
14581 /* Count the number of parameters.
14582 FIXME: GDB currently ignores vararg functions, but knows about
14583 vararg member functions. */
14585 child_die
= die
->child
;
14586 while (child_die
&& child_die
->tag
)
14588 if (child_die
->tag
== DW_TAG_formal_parameter
)
14590 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
14591 TYPE_VARARGS (ftype
) = 1;
14592 child_die
= sibling_die (child_die
);
14595 /* Allocate storage for parameters and fill them in. */
14596 TYPE_NFIELDS (ftype
) = nparams
;
14597 TYPE_FIELDS (ftype
) = (struct field
*)
14598 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
14600 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
14601 even if we error out during the parameters reading below. */
14602 for (iparams
= 0; iparams
< nparams
; iparams
++)
14603 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
14606 child_die
= die
->child
;
14607 while (child_die
&& child_die
->tag
)
14609 if (child_die
->tag
== DW_TAG_formal_parameter
)
14611 struct type
*arg_type
;
14613 /* DWARF version 2 has no clean way to discern C++
14614 static and non-static member functions. G++ helps
14615 GDB by marking the first parameter for non-static
14616 member functions (which is the this pointer) as
14617 artificial. We pass this information to
14618 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
14620 DWARF version 3 added DW_AT_object_pointer, which GCC
14621 4.5 does not yet generate. */
14622 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
14624 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
14627 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
14629 /* GCC/43521: In java, the formal parameter
14630 "this" is sometimes not marked with DW_AT_artificial. */
14631 if (cu
->language
== language_java
)
14633 const char *name
= dwarf2_name (child_die
, cu
);
14635 if (name
&& !strcmp (name
, "this"))
14636 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
14639 arg_type
= die_type (child_die
, cu
);
14641 /* RealView does not mark THIS as const, which the testsuite
14642 expects. GCC marks THIS as const in method definitions,
14643 but not in the class specifications (GCC PR 43053). */
14644 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
14645 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
14648 struct dwarf2_cu
*arg_cu
= cu
;
14649 const char *name
= dwarf2_name (child_die
, cu
);
14651 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
14654 /* If the compiler emits this, use it. */
14655 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
14658 else if (name
&& strcmp (name
, "this") == 0)
14659 /* Function definitions will have the argument names. */
14661 else if (name
== NULL
&& iparams
== 0)
14662 /* Declarations may not have the names, so like
14663 elsewhere in GDB, assume an artificial first
14664 argument is "this". */
14668 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
14672 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
14675 child_die
= sibling_die (child_die
);
14682 static struct type
*
14683 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
14685 struct objfile
*objfile
= cu
->objfile
;
14686 const char *name
= NULL
;
14687 struct type
*this_type
, *target_type
;
14689 name
= dwarf2_full_name (NULL
, die
, cu
);
14690 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
14691 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
14692 TYPE_NAME (this_type
) = name
;
14693 set_die_type (die
, this_type
, cu
);
14694 target_type
= die_type (die
, cu
);
14695 if (target_type
!= this_type
)
14696 TYPE_TARGET_TYPE (this_type
) = target_type
;
14699 /* Self-referential typedefs are, it seems, not allowed by the DWARF
14700 spec and cause infinite loops in GDB. */
14701 complaint (&symfile_complaints
,
14702 _("Self-referential DW_TAG_typedef "
14703 "- DIE at 0x%x [in module %s]"),
14704 die
->offset
.sect_off
, objfile_name (objfile
));
14705 TYPE_TARGET_TYPE (this_type
) = NULL
;
14710 /* Find a representation of a given base type and install
14711 it in the TYPE field of the die. */
14713 static struct type
*
14714 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14716 struct objfile
*objfile
= cu
->objfile
;
14718 struct attribute
*attr
;
14719 int encoding
= 0, size
= 0;
14721 enum type_code code
= TYPE_CODE_INT
;
14722 int type_flags
= 0;
14723 struct type
*target_type
= NULL
;
14725 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
14728 encoding
= DW_UNSND (attr
);
14730 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14733 size
= DW_UNSND (attr
);
14735 name
= dwarf2_name (die
, cu
);
14738 complaint (&symfile_complaints
,
14739 _("DW_AT_name missing from DW_TAG_base_type"));
14744 case DW_ATE_address
:
14745 /* Turn DW_ATE_address into a void * pointer. */
14746 code
= TYPE_CODE_PTR
;
14747 type_flags
|= TYPE_FLAG_UNSIGNED
;
14748 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
14750 case DW_ATE_boolean
:
14751 code
= TYPE_CODE_BOOL
;
14752 type_flags
|= TYPE_FLAG_UNSIGNED
;
14754 case DW_ATE_complex_float
:
14755 code
= TYPE_CODE_COMPLEX
;
14756 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
14758 case DW_ATE_decimal_float
:
14759 code
= TYPE_CODE_DECFLOAT
;
14762 code
= TYPE_CODE_FLT
;
14764 case DW_ATE_signed
:
14766 case DW_ATE_unsigned
:
14767 type_flags
|= TYPE_FLAG_UNSIGNED
;
14768 if (cu
->language
== language_fortran
14770 && startswith (name
, "character("))
14771 code
= TYPE_CODE_CHAR
;
14773 case DW_ATE_signed_char
:
14774 if (cu
->language
== language_ada
|| cu
->language
== language_m2
14775 || cu
->language
== language_pascal
14776 || cu
->language
== language_fortran
)
14777 code
= TYPE_CODE_CHAR
;
14779 case DW_ATE_unsigned_char
:
14780 if (cu
->language
== language_ada
|| cu
->language
== language_m2
14781 || cu
->language
== language_pascal
14782 || cu
->language
== language_fortran
14783 || cu
->language
== language_rust
)
14784 code
= TYPE_CODE_CHAR
;
14785 type_flags
|= TYPE_FLAG_UNSIGNED
;
14788 /* We just treat this as an integer and then recognize the
14789 type by name elsewhere. */
14793 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
14794 dwarf_type_encoding_name (encoding
));
14798 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
14799 TYPE_NAME (type
) = name
;
14800 TYPE_TARGET_TYPE (type
) = target_type
;
14802 if (name
&& strcmp (name
, "char") == 0)
14803 TYPE_NOSIGN (type
) = 1;
14805 return set_die_type (die
, type
, cu
);
14808 /* Parse dwarf attribute if it's a block, reference or constant and put the
14809 resulting value of the attribute into struct bound_prop.
14810 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
14813 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
14814 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
)
14816 struct dwarf2_property_baton
*baton
;
14817 struct obstack
*obstack
= &cu
->objfile
->objfile_obstack
;
14819 if (attr
== NULL
|| prop
== NULL
)
14822 if (attr_form_is_block (attr
))
14824 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
14825 baton
->referenced_type
= NULL
;
14826 baton
->locexpr
.per_cu
= cu
->per_cu
;
14827 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
14828 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
14829 prop
->data
.baton
= baton
;
14830 prop
->kind
= PROP_LOCEXPR
;
14831 gdb_assert (prop
->data
.baton
!= NULL
);
14833 else if (attr_form_is_ref (attr
))
14835 struct dwarf2_cu
*target_cu
= cu
;
14836 struct die_info
*target_die
;
14837 struct attribute
*target_attr
;
14839 target_die
= follow_die_ref (die
, attr
, &target_cu
);
14840 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
14841 if (target_attr
== NULL
)
14842 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
14844 if (target_attr
== NULL
)
14847 switch (target_attr
->name
)
14849 case DW_AT_location
:
14850 if (attr_form_is_section_offset (target_attr
))
14852 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
14853 baton
->referenced_type
= die_type (target_die
, target_cu
);
14854 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
14855 prop
->data
.baton
= baton
;
14856 prop
->kind
= PROP_LOCLIST
;
14857 gdb_assert (prop
->data
.baton
!= NULL
);
14859 else if (attr_form_is_block (target_attr
))
14861 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
14862 baton
->referenced_type
= die_type (target_die
, target_cu
);
14863 baton
->locexpr
.per_cu
= cu
->per_cu
;
14864 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
14865 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
14866 prop
->data
.baton
= baton
;
14867 prop
->kind
= PROP_LOCEXPR
;
14868 gdb_assert (prop
->data
.baton
!= NULL
);
14872 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
14873 "dynamic property");
14877 case DW_AT_data_member_location
:
14881 if (!handle_data_member_location (target_die
, target_cu
,
14885 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
14886 baton
->referenced_type
= read_type_die (target_die
->parent
,
14888 baton
->offset_info
.offset
= offset
;
14889 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
14890 prop
->data
.baton
= baton
;
14891 prop
->kind
= PROP_ADDR_OFFSET
;
14896 else if (attr_form_is_constant (attr
))
14898 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
14899 prop
->kind
= PROP_CONST
;
14903 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
14904 dwarf2_name (die
, cu
));
14911 /* Read the given DW_AT_subrange DIE. */
14913 static struct type
*
14914 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14916 struct type
*base_type
, *orig_base_type
;
14917 struct type
*range_type
;
14918 struct attribute
*attr
;
14919 struct dynamic_prop low
, high
;
14920 int low_default_is_valid
;
14921 int high_bound_is_count
= 0;
14923 LONGEST negative_mask
;
14925 orig_base_type
= die_type (die
, cu
);
14926 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
14927 whereas the real type might be. So, we use ORIG_BASE_TYPE when
14928 creating the range type, but we use the result of check_typedef
14929 when examining properties of the type. */
14930 base_type
= check_typedef (orig_base_type
);
14932 /* The die_type call above may have already set the type for this DIE. */
14933 range_type
= get_die_type (die
, cu
);
14937 low
.kind
= PROP_CONST
;
14938 high
.kind
= PROP_CONST
;
14939 high
.data
.const_val
= 0;
14941 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
14942 omitting DW_AT_lower_bound. */
14943 switch (cu
->language
)
14946 case language_cplus
:
14947 low
.data
.const_val
= 0;
14948 low_default_is_valid
= 1;
14950 case language_fortran
:
14951 low
.data
.const_val
= 1;
14952 low_default_is_valid
= 1;
14955 case language_java
:
14956 case language_objc
:
14957 case language_rust
:
14958 low
.data
.const_val
= 0;
14959 low_default_is_valid
= (cu
->header
.version
>= 4);
14963 case language_pascal
:
14964 low
.data
.const_val
= 1;
14965 low_default_is_valid
= (cu
->header
.version
>= 4);
14968 low
.data
.const_val
= 0;
14969 low_default_is_valid
= 0;
14973 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
14975 attr_to_dynamic_prop (attr
, die
, cu
, &low
);
14976 else if (!low_default_is_valid
)
14977 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
14978 "- DIE at 0x%x [in module %s]"),
14979 die
->offset
.sect_off
, objfile_name (cu
->objfile
));
14981 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
14982 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
))
14984 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
14985 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
))
14987 /* If bounds are constant do the final calculation here. */
14988 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
14989 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
14991 high_bound_is_count
= 1;
14995 /* Dwarf-2 specifications explicitly allows to create subrange types
14996 without specifying a base type.
14997 In that case, the base type must be set to the type of
14998 the lower bound, upper bound or count, in that order, if any of these
14999 three attributes references an object that has a type.
15000 If no base type is found, the Dwarf-2 specifications say that
15001 a signed integer type of size equal to the size of an address should
15003 For the following C code: `extern char gdb_int [];'
15004 GCC produces an empty range DIE.
15005 FIXME: muller/2010-05-28: Possible references to object for low bound,
15006 high bound or count are not yet handled by this code. */
15007 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
15009 struct objfile
*objfile
= cu
->objfile
;
15010 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15011 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
15012 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
15014 /* Test "int", "long int", and "long long int" objfile types,
15015 and select the first one having a size above or equal to the
15016 architecture address size. */
15017 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15018 base_type
= int_type
;
15021 int_type
= objfile_type (objfile
)->builtin_long
;
15022 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15023 base_type
= int_type
;
15026 int_type
= objfile_type (objfile
)->builtin_long_long
;
15027 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15028 base_type
= int_type
;
15033 /* Normally, the DWARF producers are expected to use a signed
15034 constant form (Eg. DW_FORM_sdata) to express negative bounds.
15035 But this is unfortunately not always the case, as witnessed
15036 with GCC, for instance, where the ambiguous DW_FORM_dataN form
15037 is used instead. To work around that ambiguity, we treat
15038 the bounds as signed, and thus sign-extend their values, when
15039 the base type is signed. */
15041 -((LONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
15042 if (low
.kind
== PROP_CONST
15043 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
15044 low
.data
.const_val
|= negative_mask
;
15045 if (high
.kind
== PROP_CONST
15046 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
15047 high
.data
.const_val
|= negative_mask
;
15049 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
);
15051 if (high_bound_is_count
)
15052 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
15054 /* Ada expects an empty array on no boundary attributes. */
15055 if (attr
== NULL
&& cu
->language
!= language_ada
)
15056 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
15058 name
= dwarf2_name (die
, cu
);
15060 TYPE_NAME (range_type
) = name
;
15062 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15064 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
15066 set_die_type (die
, range_type
, cu
);
15068 /* set_die_type should be already done. */
15069 set_descriptive_type (range_type
, die
, cu
);
15074 static struct type
*
15075 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15079 /* For now, we only support the C meaning of an unspecified type: void. */
15081 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
15082 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
15084 return set_die_type (die
, type
, cu
);
15087 /* Read a single die and all its descendents. Set the die's sibling
15088 field to NULL; set other fields in the die correctly, and set all
15089 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
15090 location of the info_ptr after reading all of those dies. PARENT
15091 is the parent of the die in question. */
15093 static struct die_info
*
15094 read_die_and_children (const struct die_reader_specs
*reader
,
15095 const gdb_byte
*info_ptr
,
15096 const gdb_byte
**new_info_ptr
,
15097 struct die_info
*parent
)
15099 struct die_info
*die
;
15100 const gdb_byte
*cur_ptr
;
15103 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
15106 *new_info_ptr
= cur_ptr
;
15109 store_in_ref_table (die
, reader
->cu
);
15112 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
15116 *new_info_ptr
= cur_ptr
;
15119 die
->sibling
= NULL
;
15120 die
->parent
= parent
;
15124 /* Read a die, all of its descendents, and all of its siblings; set
15125 all of the fields of all of the dies correctly. Arguments are as
15126 in read_die_and_children. */
15128 static struct die_info
*
15129 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
15130 const gdb_byte
*info_ptr
,
15131 const gdb_byte
**new_info_ptr
,
15132 struct die_info
*parent
)
15134 struct die_info
*first_die
, *last_sibling
;
15135 const gdb_byte
*cur_ptr
;
15137 cur_ptr
= info_ptr
;
15138 first_die
= last_sibling
= NULL
;
15142 struct die_info
*die
15143 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
15147 *new_info_ptr
= cur_ptr
;
15154 last_sibling
->sibling
= die
;
15156 last_sibling
= die
;
15160 /* Read a die, all of its descendents, and all of its siblings; set
15161 all of the fields of all of the dies correctly. Arguments are as
15162 in read_die_and_children.
15163 This the main entry point for reading a DIE and all its children. */
15165 static struct die_info
*
15166 read_die_and_siblings (const struct die_reader_specs
*reader
,
15167 const gdb_byte
*info_ptr
,
15168 const gdb_byte
**new_info_ptr
,
15169 struct die_info
*parent
)
15171 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
15172 new_info_ptr
, parent
);
15174 if (dwarf_die_debug
)
15176 fprintf_unfiltered (gdb_stdlog
,
15177 "Read die from %s@0x%x of %s:\n",
15178 get_section_name (reader
->die_section
),
15179 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
15180 bfd_get_filename (reader
->abfd
));
15181 dump_die (die
, dwarf_die_debug
);
15187 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
15189 The caller is responsible for filling in the extra attributes
15190 and updating (*DIEP)->num_attrs.
15191 Set DIEP to point to a newly allocated die with its information,
15192 except for its child, sibling, and parent fields.
15193 Set HAS_CHILDREN to tell whether the die has children or not. */
15195 static const gdb_byte
*
15196 read_full_die_1 (const struct die_reader_specs
*reader
,
15197 struct die_info
**diep
, const gdb_byte
*info_ptr
,
15198 int *has_children
, int num_extra_attrs
)
15200 unsigned int abbrev_number
, bytes_read
, i
;
15201 sect_offset offset
;
15202 struct abbrev_info
*abbrev
;
15203 struct die_info
*die
;
15204 struct dwarf2_cu
*cu
= reader
->cu
;
15205 bfd
*abfd
= reader
->abfd
;
15207 offset
.sect_off
= info_ptr
- reader
->buffer
;
15208 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
15209 info_ptr
+= bytes_read
;
15210 if (!abbrev_number
)
15217 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
15219 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
15221 bfd_get_filename (abfd
));
15223 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
15224 die
->offset
= offset
;
15225 die
->tag
= abbrev
->tag
;
15226 die
->abbrev
= abbrev_number
;
15228 /* Make the result usable.
15229 The caller needs to update num_attrs after adding the extra
15231 die
->num_attrs
= abbrev
->num_attrs
;
15233 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
15234 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
15238 *has_children
= abbrev
->has_children
;
15242 /* Read a die and all its attributes.
15243 Set DIEP to point to a newly allocated die with its information,
15244 except for its child, sibling, and parent fields.
15245 Set HAS_CHILDREN to tell whether the die has children or not. */
15247 static const gdb_byte
*
15248 read_full_die (const struct die_reader_specs
*reader
,
15249 struct die_info
**diep
, const gdb_byte
*info_ptr
,
15252 const gdb_byte
*result
;
15254 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
15256 if (dwarf_die_debug
)
15258 fprintf_unfiltered (gdb_stdlog
,
15259 "Read die from %s@0x%x of %s:\n",
15260 get_section_name (reader
->die_section
),
15261 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
15262 bfd_get_filename (reader
->abfd
));
15263 dump_die (*diep
, dwarf_die_debug
);
15269 /* Abbreviation tables.
15271 In DWARF version 2, the description of the debugging information is
15272 stored in a separate .debug_abbrev section. Before we read any
15273 dies from a section we read in all abbreviations and install them
15274 in a hash table. */
15276 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
15278 static struct abbrev_info
*
15279 abbrev_table_alloc_abbrev (struct abbrev_table
*abbrev_table
)
15281 struct abbrev_info
*abbrev
;
15283 abbrev
= XOBNEW (&abbrev_table
->abbrev_obstack
, struct abbrev_info
);
15284 memset (abbrev
, 0, sizeof (struct abbrev_info
));
15289 /* Add an abbreviation to the table. */
15292 abbrev_table_add_abbrev (struct abbrev_table
*abbrev_table
,
15293 unsigned int abbrev_number
,
15294 struct abbrev_info
*abbrev
)
15296 unsigned int hash_number
;
15298 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15299 abbrev
->next
= abbrev_table
->abbrevs
[hash_number
];
15300 abbrev_table
->abbrevs
[hash_number
] = abbrev
;
15303 /* Look up an abbrev in the table.
15304 Returns NULL if the abbrev is not found. */
15306 static struct abbrev_info
*
15307 abbrev_table_lookup_abbrev (const struct abbrev_table
*abbrev_table
,
15308 unsigned int abbrev_number
)
15310 unsigned int hash_number
;
15311 struct abbrev_info
*abbrev
;
15313 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15314 abbrev
= abbrev_table
->abbrevs
[hash_number
];
15318 if (abbrev
->number
== abbrev_number
)
15320 abbrev
= abbrev
->next
;
15325 /* Read in an abbrev table. */
15327 static struct abbrev_table
*
15328 abbrev_table_read_table (struct dwarf2_section_info
*section
,
15329 sect_offset offset
)
15331 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
15332 bfd
*abfd
= get_section_bfd_owner (section
);
15333 struct abbrev_table
*abbrev_table
;
15334 const gdb_byte
*abbrev_ptr
;
15335 struct abbrev_info
*cur_abbrev
;
15336 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
15337 unsigned int abbrev_form
;
15338 struct attr_abbrev
*cur_attrs
;
15339 unsigned int allocated_attrs
;
15341 abbrev_table
= XNEW (struct abbrev_table
);
15342 abbrev_table
->offset
= offset
;
15343 obstack_init (&abbrev_table
->abbrev_obstack
);
15344 abbrev_table
->abbrevs
=
15345 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct abbrev_info
*,
15347 memset (abbrev_table
->abbrevs
, 0,
15348 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
15350 dwarf2_read_section (objfile
, section
);
15351 abbrev_ptr
= section
->buffer
+ offset
.sect_off
;
15352 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15353 abbrev_ptr
+= bytes_read
;
15355 allocated_attrs
= ATTR_ALLOC_CHUNK
;
15356 cur_attrs
= XNEWVEC (struct attr_abbrev
, allocated_attrs
);
15358 /* Loop until we reach an abbrev number of 0. */
15359 while (abbrev_number
)
15361 cur_abbrev
= abbrev_table_alloc_abbrev (abbrev_table
);
15363 /* read in abbrev header */
15364 cur_abbrev
->number
= abbrev_number
;
15366 = (enum dwarf_tag
) read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15367 abbrev_ptr
+= bytes_read
;
15368 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
15371 /* now read in declarations */
15372 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15373 abbrev_ptr
+= bytes_read
;
15374 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15375 abbrev_ptr
+= bytes_read
;
15376 while (abbrev_name
)
15378 if (cur_abbrev
->num_attrs
== allocated_attrs
)
15380 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
15382 = XRESIZEVEC (struct attr_abbrev
, cur_attrs
, allocated_attrs
);
15385 cur_attrs
[cur_abbrev
->num_attrs
].name
15386 = (enum dwarf_attribute
) abbrev_name
;
15387 cur_attrs
[cur_abbrev
->num_attrs
++].form
15388 = (enum dwarf_form
) abbrev_form
;
15389 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15390 abbrev_ptr
+= bytes_read
;
15391 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15392 abbrev_ptr
+= bytes_read
;
15395 cur_abbrev
->attrs
=
15396 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct attr_abbrev
,
15397 cur_abbrev
->num_attrs
);
15398 memcpy (cur_abbrev
->attrs
, cur_attrs
,
15399 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
15401 abbrev_table_add_abbrev (abbrev_table
, abbrev_number
, cur_abbrev
);
15403 /* Get next abbreviation.
15404 Under Irix6 the abbreviations for a compilation unit are not
15405 always properly terminated with an abbrev number of 0.
15406 Exit loop if we encounter an abbreviation which we have
15407 already read (which means we are about to read the abbreviations
15408 for the next compile unit) or if the end of the abbreviation
15409 table is reached. */
15410 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
15412 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15413 abbrev_ptr
+= bytes_read
;
15414 if (abbrev_table_lookup_abbrev (abbrev_table
, abbrev_number
) != NULL
)
15419 return abbrev_table
;
15422 /* Free the resources held by ABBREV_TABLE. */
15425 abbrev_table_free (struct abbrev_table
*abbrev_table
)
15427 obstack_free (&abbrev_table
->abbrev_obstack
, NULL
);
15428 xfree (abbrev_table
);
15431 /* Same as abbrev_table_free but as a cleanup.
15432 We pass in a pointer to the pointer to the table so that we can
15433 set the pointer to NULL when we're done. It also simplifies
15434 build_type_psymtabs_1. */
15437 abbrev_table_free_cleanup (void *table_ptr
)
15439 struct abbrev_table
**abbrev_table_ptr
= (struct abbrev_table
**) table_ptr
;
15441 if (*abbrev_table_ptr
!= NULL
)
15442 abbrev_table_free (*abbrev_table_ptr
);
15443 *abbrev_table_ptr
= NULL
;
15446 /* Read the abbrev table for CU from ABBREV_SECTION. */
15449 dwarf2_read_abbrevs (struct dwarf2_cu
*cu
,
15450 struct dwarf2_section_info
*abbrev_section
)
15453 abbrev_table_read_table (abbrev_section
, cu
->header
.abbrev_offset
);
15456 /* Release the memory used by the abbrev table for a compilation unit. */
15459 dwarf2_free_abbrev_table (void *ptr_to_cu
)
15461 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr_to_cu
;
15463 if (cu
->abbrev_table
!= NULL
)
15464 abbrev_table_free (cu
->abbrev_table
);
15465 /* Set this to NULL so that we SEGV if we try to read it later,
15466 and also because free_comp_unit verifies this is NULL. */
15467 cu
->abbrev_table
= NULL
;
15470 /* Returns nonzero if TAG represents a type that we might generate a partial
15474 is_type_tag_for_partial (int tag
)
15479 /* Some types that would be reasonable to generate partial symbols for,
15480 that we don't at present. */
15481 case DW_TAG_array_type
:
15482 case DW_TAG_file_type
:
15483 case DW_TAG_ptr_to_member_type
:
15484 case DW_TAG_set_type
:
15485 case DW_TAG_string_type
:
15486 case DW_TAG_subroutine_type
:
15488 case DW_TAG_base_type
:
15489 case DW_TAG_class_type
:
15490 case DW_TAG_interface_type
:
15491 case DW_TAG_enumeration_type
:
15492 case DW_TAG_structure_type
:
15493 case DW_TAG_subrange_type
:
15494 case DW_TAG_typedef
:
15495 case DW_TAG_union_type
:
15502 /* Load all DIEs that are interesting for partial symbols into memory. */
15504 static struct partial_die_info
*
15505 load_partial_dies (const struct die_reader_specs
*reader
,
15506 const gdb_byte
*info_ptr
, int building_psymtab
)
15508 struct dwarf2_cu
*cu
= reader
->cu
;
15509 struct objfile
*objfile
= cu
->objfile
;
15510 struct partial_die_info
*part_die
;
15511 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
15512 struct abbrev_info
*abbrev
;
15513 unsigned int bytes_read
;
15514 unsigned int load_all
= 0;
15515 int nesting_level
= 1;
15520 gdb_assert (cu
->per_cu
!= NULL
);
15521 if (cu
->per_cu
->load_all_dies
)
15525 = htab_create_alloc_ex (cu
->header
.length
/ 12,
15529 &cu
->comp_unit_obstack
,
15530 hashtab_obstack_allocate
,
15531 dummy_obstack_deallocate
);
15533 part_die
= XOBNEW (&cu
->comp_unit_obstack
, struct partial_die_info
);
15537 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
15539 /* A NULL abbrev means the end of a series of children. */
15540 if (abbrev
== NULL
)
15542 if (--nesting_level
== 0)
15544 /* PART_DIE was probably the last thing allocated on the
15545 comp_unit_obstack, so we could call obstack_free
15546 here. We don't do that because the waste is small,
15547 and will be cleaned up when we're done with this
15548 compilation unit. This way, we're also more robust
15549 against other users of the comp_unit_obstack. */
15552 info_ptr
+= bytes_read
;
15553 last_die
= parent_die
;
15554 parent_die
= parent_die
->die_parent
;
15558 /* Check for template arguments. We never save these; if
15559 they're seen, we just mark the parent, and go on our way. */
15560 if (parent_die
!= NULL
15561 && cu
->language
== language_cplus
15562 && (abbrev
->tag
== DW_TAG_template_type_param
15563 || abbrev
->tag
== DW_TAG_template_value_param
))
15565 parent_die
->has_template_arguments
= 1;
15569 /* We don't need a partial DIE for the template argument. */
15570 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15575 /* We only recurse into c++ subprograms looking for template arguments.
15576 Skip their other children. */
15578 && cu
->language
== language_cplus
15579 && parent_die
!= NULL
15580 && parent_die
->tag
== DW_TAG_subprogram
)
15582 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15586 /* Check whether this DIE is interesting enough to save. Normally
15587 we would not be interested in members here, but there may be
15588 later variables referencing them via DW_AT_specification (for
15589 static members). */
15591 && !is_type_tag_for_partial (abbrev
->tag
)
15592 && abbrev
->tag
!= DW_TAG_constant
15593 && abbrev
->tag
!= DW_TAG_enumerator
15594 && abbrev
->tag
!= DW_TAG_subprogram
15595 && abbrev
->tag
!= DW_TAG_lexical_block
15596 && abbrev
->tag
!= DW_TAG_variable
15597 && abbrev
->tag
!= DW_TAG_namespace
15598 && abbrev
->tag
!= DW_TAG_module
15599 && abbrev
->tag
!= DW_TAG_member
15600 && abbrev
->tag
!= DW_TAG_imported_unit
15601 && abbrev
->tag
!= DW_TAG_imported_declaration
)
15603 /* Otherwise we skip to the next sibling, if any. */
15604 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15608 info_ptr
= read_partial_die (reader
, part_die
, abbrev
, bytes_read
,
15611 /* This two-pass algorithm for processing partial symbols has a
15612 high cost in cache pressure. Thus, handle some simple cases
15613 here which cover the majority of C partial symbols. DIEs
15614 which neither have specification tags in them, nor could have
15615 specification tags elsewhere pointing at them, can simply be
15616 processed and discarded.
15618 This segment is also optional; scan_partial_symbols and
15619 add_partial_symbol will handle these DIEs if we chain
15620 them in normally. When compilers which do not emit large
15621 quantities of duplicate debug information are more common,
15622 this code can probably be removed. */
15624 /* Any complete simple types at the top level (pretty much all
15625 of them, for a language without namespaces), can be processed
15627 if (parent_die
== NULL
15628 && part_die
->has_specification
== 0
15629 && part_die
->is_declaration
== 0
15630 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
15631 || part_die
->tag
== DW_TAG_base_type
15632 || part_die
->tag
== DW_TAG_subrange_type
))
15634 if (building_psymtab
&& part_die
->name
!= NULL
)
15635 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
15636 VAR_DOMAIN
, LOC_TYPEDEF
,
15637 &objfile
->static_psymbols
,
15638 0, cu
->language
, objfile
);
15639 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
15643 /* The exception for DW_TAG_typedef with has_children above is
15644 a workaround of GCC PR debug/47510. In the case of this complaint
15645 type_name_no_tag_or_error will error on such types later.
15647 GDB skipped children of DW_TAG_typedef by the shortcut above and then
15648 it could not find the child DIEs referenced later, this is checked
15649 above. In correct DWARF DW_TAG_typedef should have no children. */
15651 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
15652 complaint (&symfile_complaints
,
15653 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
15654 "- DIE at 0x%x [in module %s]"),
15655 part_die
->offset
.sect_off
, objfile_name (objfile
));
15657 /* If we're at the second level, and we're an enumerator, and
15658 our parent has no specification (meaning possibly lives in a
15659 namespace elsewhere), then we can add the partial symbol now
15660 instead of queueing it. */
15661 if (part_die
->tag
== DW_TAG_enumerator
15662 && parent_die
!= NULL
15663 && parent_die
->die_parent
== NULL
15664 && parent_die
->tag
== DW_TAG_enumeration_type
15665 && parent_die
->has_specification
== 0)
15667 if (part_die
->name
== NULL
)
15668 complaint (&symfile_complaints
,
15669 _("malformed enumerator DIE ignored"));
15670 else if (building_psymtab
)
15671 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
15672 VAR_DOMAIN
, LOC_CONST
,
15673 (cu
->language
== language_cplus
15674 || cu
->language
== language_java
)
15675 ? &objfile
->global_psymbols
15676 : &objfile
->static_psymbols
,
15677 0, cu
->language
, objfile
);
15679 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
15683 /* We'll save this DIE so link it in. */
15684 part_die
->die_parent
= parent_die
;
15685 part_die
->die_sibling
= NULL
;
15686 part_die
->die_child
= NULL
;
15688 if (last_die
&& last_die
== parent_die
)
15689 last_die
->die_child
= part_die
;
15691 last_die
->die_sibling
= part_die
;
15693 last_die
= part_die
;
15695 if (first_die
== NULL
)
15696 first_die
= part_die
;
15698 /* Maybe add the DIE to the hash table. Not all DIEs that we
15699 find interesting need to be in the hash table, because we
15700 also have the parent/sibling/child chains; only those that we
15701 might refer to by offset later during partial symbol reading.
15703 For now this means things that might have be the target of a
15704 DW_AT_specification, DW_AT_abstract_origin, or
15705 DW_AT_extension. DW_AT_extension will refer only to
15706 namespaces; DW_AT_abstract_origin refers to functions (and
15707 many things under the function DIE, but we do not recurse
15708 into function DIEs during partial symbol reading) and
15709 possibly variables as well; DW_AT_specification refers to
15710 declarations. Declarations ought to have the DW_AT_declaration
15711 flag. It happens that GCC forgets to put it in sometimes, but
15712 only for functions, not for types.
15714 Adding more things than necessary to the hash table is harmless
15715 except for the performance cost. Adding too few will result in
15716 wasted time in find_partial_die, when we reread the compilation
15717 unit with load_all_dies set. */
15720 || abbrev
->tag
== DW_TAG_constant
15721 || abbrev
->tag
== DW_TAG_subprogram
15722 || abbrev
->tag
== DW_TAG_variable
15723 || abbrev
->tag
== DW_TAG_namespace
15724 || part_die
->is_declaration
)
15728 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
15729 part_die
->offset
.sect_off
, INSERT
);
15733 part_die
= XOBNEW (&cu
->comp_unit_obstack
, struct partial_die_info
);
15735 /* For some DIEs we want to follow their children (if any). For C
15736 we have no reason to follow the children of structures; for other
15737 languages we have to, so that we can get at method physnames
15738 to infer fully qualified class names, for DW_AT_specification,
15739 and for C++ template arguments. For C++, we also look one level
15740 inside functions to find template arguments (if the name of the
15741 function does not already contain the template arguments).
15743 For Ada, we need to scan the children of subprograms and lexical
15744 blocks as well because Ada allows the definition of nested
15745 entities that could be interesting for the debugger, such as
15746 nested subprograms for instance. */
15747 if (last_die
->has_children
15749 || last_die
->tag
== DW_TAG_namespace
15750 || last_die
->tag
== DW_TAG_module
15751 || last_die
->tag
== DW_TAG_enumeration_type
15752 || (cu
->language
== language_cplus
15753 && last_die
->tag
== DW_TAG_subprogram
15754 && (last_die
->name
== NULL
15755 || strchr (last_die
->name
, '<') == NULL
))
15756 || (cu
->language
!= language_c
15757 && (last_die
->tag
== DW_TAG_class_type
15758 || last_die
->tag
== DW_TAG_interface_type
15759 || last_die
->tag
== DW_TAG_structure_type
15760 || last_die
->tag
== DW_TAG_union_type
))
15761 || (cu
->language
== language_ada
15762 && (last_die
->tag
== DW_TAG_subprogram
15763 || last_die
->tag
== DW_TAG_lexical_block
))))
15766 parent_die
= last_die
;
15770 /* Otherwise we skip to the next sibling, if any. */
15771 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
15773 /* Back to the top, do it again. */
15777 /* Read a minimal amount of information into the minimal die structure. */
15779 static const gdb_byte
*
15780 read_partial_die (const struct die_reader_specs
*reader
,
15781 struct partial_die_info
*part_die
,
15782 struct abbrev_info
*abbrev
, unsigned int abbrev_len
,
15783 const gdb_byte
*info_ptr
)
15785 struct dwarf2_cu
*cu
= reader
->cu
;
15786 struct objfile
*objfile
= cu
->objfile
;
15787 const gdb_byte
*buffer
= reader
->buffer
;
15789 struct attribute attr
;
15790 int has_low_pc_attr
= 0;
15791 int has_high_pc_attr
= 0;
15792 int high_pc_relative
= 0;
15794 memset (part_die
, 0, sizeof (struct partial_die_info
));
15796 part_die
->offset
.sect_off
= info_ptr
- buffer
;
15798 info_ptr
+= abbrev_len
;
15800 if (abbrev
== NULL
)
15803 part_die
->tag
= abbrev
->tag
;
15804 part_die
->has_children
= abbrev
->has_children
;
15806 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
15808 info_ptr
= read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
15810 /* Store the data if it is of an attribute we want to keep in a
15811 partial symbol table. */
15815 switch (part_die
->tag
)
15817 case DW_TAG_compile_unit
:
15818 case DW_TAG_partial_unit
:
15819 case DW_TAG_type_unit
:
15820 /* Compilation units have a DW_AT_name that is a filename, not
15821 a source language identifier. */
15822 case DW_TAG_enumeration_type
:
15823 case DW_TAG_enumerator
:
15824 /* These tags always have simple identifiers already; no need
15825 to canonicalize them. */
15826 part_die
->name
= DW_STRING (&attr
);
15830 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
15831 &objfile
->per_bfd
->storage_obstack
);
15835 case DW_AT_linkage_name
:
15836 case DW_AT_MIPS_linkage_name
:
15837 /* Note that both forms of linkage name might appear. We
15838 assume they will be the same, and we only store the last
15840 if (cu
->language
== language_ada
)
15841 part_die
->name
= DW_STRING (&attr
);
15842 part_die
->linkage_name
= DW_STRING (&attr
);
15845 has_low_pc_attr
= 1;
15846 part_die
->lowpc
= attr_value_as_address (&attr
);
15848 case DW_AT_high_pc
:
15849 has_high_pc_attr
= 1;
15850 part_die
->highpc
= attr_value_as_address (&attr
);
15851 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
15852 high_pc_relative
= 1;
15854 case DW_AT_location
:
15855 /* Support the .debug_loc offsets. */
15856 if (attr_form_is_block (&attr
))
15858 part_die
->d
.locdesc
= DW_BLOCK (&attr
);
15860 else if (attr_form_is_section_offset (&attr
))
15862 dwarf2_complex_location_expr_complaint ();
15866 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
15867 "partial symbol information");
15870 case DW_AT_external
:
15871 part_die
->is_external
= DW_UNSND (&attr
);
15873 case DW_AT_declaration
:
15874 part_die
->is_declaration
= DW_UNSND (&attr
);
15877 part_die
->has_type
= 1;
15879 case DW_AT_abstract_origin
:
15880 case DW_AT_specification
:
15881 case DW_AT_extension
:
15882 part_die
->has_specification
= 1;
15883 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
15884 part_die
->spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
15885 || cu
->per_cu
->is_dwz
);
15887 case DW_AT_sibling
:
15888 /* Ignore absolute siblings, they might point outside of
15889 the current compile unit. */
15890 if (attr
.form
== DW_FORM_ref_addr
)
15891 complaint (&symfile_complaints
,
15892 _("ignoring absolute DW_AT_sibling"));
15895 unsigned int off
= dwarf2_get_ref_die_offset (&attr
).sect_off
;
15896 const gdb_byte
*sibling_ptr
= buffer
+ off
;
15898 if (sibling_ptr
< info_ptr
)
15899 complaint (&symfile_complaints
,
15900 _("DW_AT_sibling points backwards"));
15901 else if (sibling_ptr
> reader
->buffer_end
)
15902 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
15904 part_die
->sibling
= sibling_ptr
;
15907 case DW_AT_byte_size
:
15908 part_die
->has_byte_size
= 1;
15910 case DW_AT_const_value
:
15911 part_die
->has_const_value
= 1;
15913 case DW_AT_calling_convention
:
15914 /* DWARF doesn't provide a way to identify a program's source-level
15915 entry point. DW_AT_calling_convention attributes are only meant
15916 to describe functions' calling conventions.
15918 However, because it's a necessary piece of information in
15919 Fortran, and because DW_CC_program is the only piece of debugging
15920 information whose definition refers to a 'main program' at all,
15921 several compilers have begun marking Fortran main programs with
15922 DW_CC_program --- even when those functions use the standard
15923 calling conventions.
15925 So until DWARF specifies a way to provide this information and
15926 compilers pick up the new representation, we'll support this
15928 if (DW_UNSND (&attr
) == DW_CC_program
15929 && cu
->language
== language_fortran
15930 && part_die
->name
!= NULL
)
15931 set_objfile_main_name (objfile
, part_die
->name
, language_fortran
);
15934 if (DW_UNSND (&attr
) == DW_INL_inlined
15935 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
15936 part_die
->may_be_inlined
= 1;
15940 if (part_die
->tag
== DW_TAG_imported_unit
)
15942 part_die
->d
.offset
= dwarf2_get_ref_die_offset (&attr
);
15943 part_die
->is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
15944 || cu
->per_cu
->is_dwz
);
15953 if (high_pc_relative
)
15954 part_die
->highpc
+= part_die
->lowpc
;
15956 if (has_low_pc_attr
&& has_high_pc_attr
)
15958 /* When using the GNU linker, .gnu.linkonce. sections are used to
15959 eliminate duplicate copies of functions and vtables and such.
15960 The linker will arbitrarily choose one and discard the others.
15961 The AT_*_pc values for such functions refer to local labels in
15962 these sections. If the section from that file was discarded, the
15963 labels are not in the output, so the relocs get a value of 0.
15964 If this is a discarded function, mark the pc bounds as invalid,
15965 so that GDB will ignore it. */
15966 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
15968 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15970 complaint (&symfile_complaints
,
15971 _("DW_AT_low_pc %s is zero "
15972 "for DIE at 0x%x [in module %s]"),
15973 paddress (gdbarch
, part_die
->lowpc
),
15974 part_die
->offset
.sect_off
, objfile_name (objfile
));
15976 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
15977 else if (part_die
->lowpc
>= part_die
->highpc
)
15979 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15981 complaint (&symfile_complaints
,
15982 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
15983 "for DIE at 0x%x [in module %s]"),
15984 paddress (gdbarch
, part_die
->lowpc
),
15985 paddress (gdbarch
, part_die
->highpc
),
15986 part_die
->offset
.sect_off
, objfile_name (objfile
));
15989 part_die
->has_pc_info
= 1;
15995 /* Find a cached partial DIE at OFFSET in CU. */
15997 static struct partial_die_info
*
15998 find_partial_die_in_comp_unit (sect_offset offset
, struct dwarf2_cu
*cu
)
16000 struct partial_die_info
*lookup_die
= NULL
;
16001 struct partial_die_info part_die
;
16003 part_die
.offset
= offset
;
16004 lookup_die
= ((struct partial_die_info
*)
16005 htab_find_with_hash (cu
->partial_dies
, &part_die
,
16011 /* Find a partial DIE at OFFSET, which may or may not be in CU,
16012 except in the case of .debug_types DIEs which do not reference
16013 outside their CU (they do however referencing other types via
16014 DW_FORM_ref_sig8). */
16016 static struct partial_die_info
*
16017 find_partial_die (sect_offset offset
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
16019 struct objfile
*objfile
= cu
->objfile
;
16020 struct dwarf2_per_cu_data
*per_cu
= NULL
;
16021 struct partial_die_info
*pd
= NULL
;
16023 if (offset_in_dwz
== cu
->per_cu
->is_dwz
16024 && offset_in_cu_p (&cu
->header
, offset
))
16026 pd
= find_partial_die_in_comp_unit (offset
, cu
);
16029 /* We missed recording what we needed.
16030 Load all dies and try again. */
16031 per_cu
= cu
->per_cu
;
16035 /* TUs don't reference other CUs/TUs (except via type signatures). */
16036 if (cu
->per_cu
->is_debug_types
)
16038 error (_("Dwarf Error: Type Unit at offset 0x%lx contains"
16039 " external reference to offset 0x%lx [in module %s].\n"),
16040 (long) cu
->header
.offset
.sect_off
, (long) offset
.sect_off
,
16041 bfd_get_filename (objfile
->obfd
));
16043 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
16046 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
16047 load_partial_comp_unit (per_cu
);
16049 per_cu
->cu
->last_used
= 0;
16050 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
16053 /* If we didn't find it, and not all dies have been loaded,
16054 load them all and try again. */
16056 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
16058 per_cu
->load_all_dies
= 1;
16060 /* This is nasty. When we reread the DIEs, somewhere up the call chain
16061 THIS_CU->cu may already be in use. So we can't just free it and
16062 replace its DIEs with the ones we read in. Instead, we leave those
16063 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
16064 and clobber THIS_CU->cu->partial_dies with the hash table for the new
16066 load_partial_comp_unit (per_cu
);
16068 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
16072 internal_error (__FILE__
, __LINE__
,
16073 _("could not find partial DIE 0x%x "
16074 "in cache [from module %s]\n"),
16075 offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
16079 /* See if we can figure out if the class lives in a namespace. We do
16080 this by looking for a member function; its demangled name will
16081 contain namespace info, if there is any. */
16084 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
16085 struct dwarf2_cu
*cu
)
16087 /* NOTE: carlton/2003-10-07: Getting the info this way changes
16088 what template types look like, because the demangler
16089 frequently doesn't give the same name as the debug info. We
16090 could fix this by only using the demangled name to get the
16091 prefix (but see comment in read_structure_type). */
16093 struct partial_die_info
*real_pdi
;
16094 struct partial_die_info
*child_pdi
;
16096 /* If this DIE (this DIE's specification, if any) has a parent, then
16097 we should not do this. We'll prepend the parent's fully qualified
16098 name when we create the partial symbol. */
16100 real_pdi
= struct_pdi
;
16101 while (real_pdi
->has_specification
)
16102 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
16103 real_pdi
->spec_is_dwz
, cu
);
16105 if (real_pdi
->die_parent
!= NULL
)
16108 for (child_pdi
= struct_pdi
->die_child
;
16110 child_pdi
= child_pdi
->die_sibling
)
16112 if (child_pdi
->tag
== DW_TAG_subprogram
16113 && child_pdi
->linkage_name
!= NULL
)
16115 char *actual_class_name
16116 = language_class_name_from_physname (cu
->language_defn
,
16117 child_pdi
->linkage_name
);
16118 if (actual_class_name
!= NULL
)
16122 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
16124 strlen (actual_class_name
)));
16125 xfree (actual_class_name
);
16132 /* Adjust PART_DIE before generating a symbol for it. This function
16133 may set the is_external flag or change the DIE's name. */
16136 fixup_partial_die (struct partial_die_info
*part_die
,
16137 struct dwarf2_cu
*cu
)
16139 /* Once we've fixed up a die, there's no point in doing so again.
16140 This also avoids a memory leak if we were to call
16141 guess_partial_die_structure_name multiple times. */
16142 if (part_die
->fixup_called
)
16145 /* If we found a reference attribute and the DIE has no name, try
16146 to find a name in the referred to DIE. */
16148 if (part_die
->name
== NULL
&& part_die
->has_specification
)
16150 struct partial_die_info
*spec_die
;
16152 spec_die
= find_partial_die (part_die
->spec_offset
,
16153 part_die
->spec_is_dwz
, cu
);
16155 fixup_partial_die (spec_die
, cu
);
16157 if (spec_die
->name
)
16159 part_die
->name
= spec_die
->name
;
16161 /* Copy DW_AT_external attribute if it is set. */
16162 if (spec_die
->is_external
)
16163 part_die
->is_external
= spec_die
->is_external
;
16167 /* Set default names for some unnamed DIEs. */
16169 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
16170 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
16172 /* If there is no parent die to provide a namespace, and there are
16173 children, see if we can determine the namespace from their linkage
16175 if (cu
->language
== language_cplus
16176 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
16177 && part_die
->die_parent
== NULL
16178 && part_die
->has_children
16179 && (part_die
->tag
== DW_TAG_class_type
16180 || part_die
->tag
== DW_TAG_structure_type
16181 || part_die
->tag
== DW_TAG_union_type
))
16182 guess_partial_die_structure_name (part_die
, cu
);
16184 /* GCC might emit a nameless struct or union that has a linkage
16185 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
16186 if (part_die
->name
== NULL
16187 && (part_die
->tag
== DW_TAG_class_type
16188 || part_die
->tag
== DW_TAG_interface_type
16189 || part_die
->tag
== DW_TAG_structure_type
16190 || part_die
->tag
== DW_TAG_union_type
)
16191 && part_die
->linkage_name
!= NULL
)
16195 demangled
= gdb_demangle (part_die
->linkage_name
, DMGL_TYPES
);
16200 /* Strip any leading namespaces/classes, keep only the base name.
16201 DW_AT_name for named DIEs does not contain the prefixes. */
16202 base
= strrchr (demangled
, ':');
16203 if (base
&& base
> demangled
&& base
[-1] == ':')
16210 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
16211 base
, strlen (base
)));
16216 part_die
->fixup_called
= 1;
16219 /* Read an attribute value described by an attribute form. */
16221 static const gdb_byte
*
16222 read_attribute_value (const struct die_reader_specs
*reader
,
16223 struct attribute
*attr
, unsigned form
,
16224 const gdb_byte
*info_ptr
)
16226 struct dwarf2_cu
*cu
= reader
->cu
;
16227 struct objfile
*objfile
= cu
->objfile
;
16228 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
16229 bfd
*abfd
= reader
->abfd
;
16230 struct comp_unit_head
*cu_header
= &cu
->header
;
16231 unsigned int bytes_read
;
16232 struct dwarf_block
*blk
;
16234 attr
->form
= (enum dwarf_form
) form
;
16237 case DW_FORM_ref_addr
:
16238 if (cu
->header
.version
== 2)
16239 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
16241 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
16242 &cu
->header
, &bytes_read
);
16243 info_ptr
+= bytes_read
;
16245 case DW_FORM_GNU_ref_alt
:
16246 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
16247 info_ptr
+= bytes_read
;
16250 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
16251 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
16252 info_ptr
+= bytes_read
;
16254 case DW_FORM_block2
:
16255 blk
= dwarf_alloc_block (cu
);
16256 blk
->size
= read_2_bytes (abfd
, info_ptr
);
16258 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16259 info_ptr
+= blk
->size
;
16260 DW_BLOCK (attr
) = blk
;
16262 case DW_FORM_block4
:
16263 blk
= dwarf_alloc_block (cu
);
16264 blk
->size
= read_4_bytes (abfd
, info_ptr
);
16266 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16267 info_ptr
+= blk
->size
;
16268 DW_BLOCK (attr
) = blk
;
16270 case DW_FORM_data2
:
16271 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
16274 case DW_FORM_data4
:
16275 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
16278 case DW_FORM_data8
:
16279 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
16282 case DW_FORM_sec_offset
:
16283 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
16284 info_ptr
+= bytes_read
;
16286 case DW_FORM_string
:
16287 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
16288 DW_STRING_IS_CANONICAL (attr
) = 0;
16289 info_ptr
+= bytes_read
;
16292 if (!cu
->per_cu
->is_dwz
)
16294 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
16296 DW_STRING_IS_CANONICAL (attr
) = 0;
16297 info_ptr
+= bytes_read
;
16301 case DW_FORM_GNU_strp_alt
:
16303 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
16304 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
16307 DW_STRING (attr
) = read_indirect_string_from_dwz (dwz
, str_offset
);
16308 DW_STRING_IS_CANONICAL (attr
) = 0;
16309 info_ptr
+= bytes_read
;
16312 case DW_FORM_exprloc
:
16313 case DW_FORM_block
:
16314 blk
= dwarf_alloc_block (cu
);
16315 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16316 info_ptr
+= bytes_read
;
16317 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16318 info_ptr
+= blk
->size
;
16319 DW_BLOCK (attr
) = blk
;
16321 case DW_FORM_block1
:
16322 blk
= dwarf_alloc_block (cu
);
16323 blk
->size
= read_1_byte (abfd
, info_ptr
);
16325 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16326 info_ptr
+= blk
->size
;
16327 DW_BLOCK (attr
) = blk
;
16329 case DW_FORM_data1
:
16330 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16334 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16337 case DW_FORM_flag_present
:
16338 DW_UNSND (attr
) = 1;
16340 case DW_FORM_sdata
:
16341 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
16342 info_ptr
+= bytes_read
;
16344 case DW_FORM_udata
:
16345 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16346 info_ptr
+= bytes_read
;
16349 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16350 + read_1_byte (abfd
, info_ptr
));
16354 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16355 + read_2_bytes (abfd
, info_ptr
));
16359 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16360 + read_4_bytes (abfd
, info_ptr
));
16364 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16365 + read_8_bytes (abfd
, info_ptr
));
16368 case DW_FORM_ref_sig8
:
16369 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
16372 case DW_FORM_ref_udata
:
16373 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16374 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
16375 info_ptr
+= bytes_read
;
16377 case DW_FORM_indirect
:
16378 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16379 info_ptr
+= bytes_read
;
16380 info_ptr
= read_attribute_value (reader
, attr
, form
, info_ptr
);
16382 case DW_FORM_GNU_addr_index
:
16383 if (reader
->dwo_file
== NULL
)
16385 /* For now flag a hard error.
16386 Later we can turn this into a complaint. */
16387 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16388 dwarf_form_name (form
),
16389 bfd_get_filename (abfd
));
16391 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
16392 info_ptr
+= bytes_read
;
16394 case DW_FORM_GNU_str_index
:
16395 if (reader
->dwo_file
== NULL
)
16397 /* For now flag a hard error.
16398 Later we can turn this into a complaint if warranted. */
16399 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16400 dwarf_form_name (form
),
16401 bfd_get_filename (abfd
));
16404 ULONGEST str_index
=
16405 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16407 DW_STRING (attr
) = read_str_index (reader
, str_index
);
16408 DW_STRING_IS_CANONICAL (attr
) = 0;
16409 info_ptr
+= bytes_read
;
16413 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
16414 dwarf_form_name (form
),
16415 bfd_get_filename (abfd
));
16419 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
16420 attr
->form
= DW_FORM_GNU_ref_alt
;
16422 /* We have seen instances where the compiler tried to emit a byte
16423 size attribute of -1 which ended up being encoded as an unsigned
16424 0xffffffff. Although 0xffffffff is technically a valid size value,
16425 an object of this size seems pretty unlikely so we can relatively
16426 safely treat these cases as if the size attribute was invalid and
16427 treat them as zero by default. */
16428 if (attr
->name
== DW_AT_byte_size
16429 && form
== DW_FORM_data4
16430 && DW_UNSND (attr
) >= 0xffffffff)
16433 (&symfile_complaints
,
16434 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
16435 hex_string (DW_UNSND (attr
)));
16436 DW_UNSND (attr
) = 0;
16442 /* Read an attribute described by an abbreviated attribute. */
16444 static const gdb_byte
*
16445 read_attribute (const struct die_reader_specs
*reader
,
16446 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
16447 const gdb_byte
*info_ptr
)
16449 attr
->name
= abbrev
->name
;
16450 return read_attribute_value (reader
, attr
, abbrev
->form
, info_ptr
);
16453 /* Read dwarf information from a buffer. */
16455 static unsigned int
16456 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
16458 return bfd_get_8 (abfd
, buf
);
16462 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
16464 return bfd_get_signed_8 (abfd
, buf
);
16467 static unsigned int
16468 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16470 return bfd_get_16 (abfd
, buf
);
16474 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16476 return bfd_get_signed_16 (abfd
, buf
);
16479 static unsigned int
16480 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16482 return bfd_get_32 (abfd
, buf
);
16486 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16488 return bfd_get_signed_32 (abfd
, buf
);
16492 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16494 return bfd_get_64 (abfd
, buf
);
16498 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
16499 unsigned int *bytes_read
)
16501 struct comp_unit_head
*cu_header
= &cu
->header
;
16502 CORE_ADDR retval
= 0;
16504 if (cu_header
->signed_addr_p
)
16506 switch (cu_header
->addr_size
)
16509 retval
= bfd_get_signed_16 (abfd
, buf
);
16512 retval
= bfd_get_signed_32 (abfd
, buf
);
16515 retval
= bfd_get_signed_64 (abfd
, buf
);
16518 internal_error (__FILE__
, __LINE__
,
16519 _("read_address: bad switch, signed [in module %s]"),
16520 bfd_get_filename (abfd
));
16525 switch (cu_header
->addr_size
)
16528 retval
= bfd_get_16 (abfd
, buf
);
16531 retval
= bfd_get_32 (abfd
, buf
);
16534 retval
= bfd_get_64 (abfd
, buf
);
16537 internal_error (__FILE__
, __LINE__
,
16538 _("read_address: bad switch, "
16539 "unsigned [in module %s]"),
16540 bfd_get_filename (abfd
));
16544 *bytes_read
= cu_header
->addr_size
;
16548 /* Read the initial length from a section. The (draft) DWARF 3
16549 specification allows the initial length to take up either 4 bytes
16550 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
16551 bytes describe the length and all offsets will be 8 bytes in length
16554 An older, non-standard 64-bit format is also handled by this
16555 function. The older format in question stores the initial length
16556 as an 8-byte quantity without an escape value. Lengths greater
16557 than 2^32 aren't very common which means that the initial 4 bytes
16558 is almost always zero. Since a length value of zero doesn't make
16559 sense for the 32-bit format, this initial zero can be considered to
16560 be an escape value which indicates the presence of the older 64-bit
16561 format. As written, the code can't detect (old format) lengths
16562 greater than 4GB. If it becomes necessary to handle lengths
16563 somewhat larger than 4GB, we could allow other small values (such
16564 as the non-sensical values of 1, 2, and 3) to also be used as
16565 escape values indicating the presence of the old format.
16567 The value returned via bytes_read should be used to increment the
16568 relevant pointer after calling read_initial_length().
16570 [ Note: read_initial_length() and read_offset() are based on the
16571 document entitled "DWARF Debugging Information Format", revision
16572 3, draft 8, dated November 19, 2001. This document was obtained
16575 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
16577 This document is only a draft and is subject to change. (So beware.)
16579 Details regarding the older, non-standard 64-bit format were
16580 determined empirically by examining 64-bit ELF files produced by
16581 the SGI toolchain on an IRIX 6.5 machine.
16583 - Kevin, July 16, 2002
16587 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
16589 LONGEST length
= bfd_get_32 (abfd
, buf
);
16591 if (length
== 0xffffffff)
16593 length
= bfd_get_64 (abfd
, buf
+ 4);
16596 else if (length
== 0)
16598 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
16599 length
= bfd_get_64 (abfd
, buf
);
16610 /* Cover function for read_initial_length.
16611 Returns the length of the object at BUF, and stores the size of the
16612 initial length in *BYTES_READ and stores the size that offsets will be in
16614 If the initial length size is not equivalent to that specified in
16615 CU_HEADER then issue a complaint.
16616 This is useful when reading non-comp-unit headers. */
16619 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
16620 const struct comp_unit_head
*cu_header
,
16621 unsigned int *bytes_read
,
16622 unsigned int *offset_size
)
16624 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
16626 gdb_assert (cu_header
->initial_length_size
== 4
16627 || cu_header
->initial_length_size
== 8
16628 || cu_header
->initial_length_size
== 12);
16630 if (cu_header
->initial_length_size
!= *bytes_read
)
16631 complaint (&symfile_complaints
,
16632 _("intermixed 32-bit and 64-bit DWARF sections"));
16634 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
16638 /* Read an offset from the data stream. The size of the offset is
16639 given by cu_header->offset_size. */
16642 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
16643 const struct comp_unit_head
*cu_header
,
16644 unsigned int *bytes_read
)
16646 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
16648 *bytes_read
= cu_header
->offset_size
;
16652 /* Read an offset from the data stream. */
16655 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
16657 LONGEST retval
= 0;
16659 switch (offset_size
)
16662 retval
= bfd_get_32 (abfd
, buf
);
16665 retval
= bfd_get_64 (abfd
, buf
);
16668 internal_error (__FILE__
, __LINE__
,
16669 _("read_offset_1: bad switch [in module %s]"),
16670 bfd_get_filename (abfd
));
16676 static const gdb_byte
*
16677 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
16679 /* If the size of a host char is 8 bits, we can return a pointer
16680 to the buffer, otherwise we have to copy the data to a buffer
16681 allocated on the temporary obstack. */
16682 gdb_assert (HOST_CHAR_BIT
== 8);
16686 static const char *
16687 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
16688 unsigned int *bytes_read_ptr
)
16690 /* If the size of a host char is 8 bits, we can return a pointer
16691 to the string, otherwise we have to copy the string to a buffer
16692 allocated on the temporary obstack. */
16693 gdb_assert (HOST_CHAR_BIT
== 8);
16696 *bytes_read_ptr
= 1;
16699 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
16700 return (const char *) buf
;
16703 static const char *
16704 read_indirect_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
16706 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
16707 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
16708 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
16709 bfd_get_filename (abfd
));
16710 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
16711 error (_("DW_FORM_strp pointing outside of "
16712 ".debug_str section [in module %s]"),
16713 bfd_get_filename (abfd
));
16714 gdb_assert (HOST_CHAR_BIT
== 8);
16715 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
16717 return (const char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
16720 /* Read a string at offset STR_OFFSET in the .debug_str section from
16721 the .dwz file DWZ. Throw an error if the offset is too large. If
16722 the string consists of a single NUL byte, return NULL; otherwise
16723 return a pointer to the string. */
16725 static const char *
16726 read_indirect_string_from_dwz (struct dwz_file
*dwz
, LONGEST str_offset
)
16728 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwz
->str
);
16730 if (dwz
->str
.buffer
== NULL
)
16731 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
16732 "section [in module %s]"),
16733 bfd_get_filename (dwz
->dwz_bfd
));
16734 if (str_offset
>= dwz
->str
.size
)
16735 error (_("DW_FORM_GNU_strp_alt pointing outside of "
16736 ".debug_str section [in module %s]"),
16737 bfd_get_filename (dwz
->dwz_bfd
));
16738 gdb_assert (HOST_CHAR_BIT
== 8);
16739 if (dwz
->str
.buffer
[str_offset
] == '\0')
16741 return (const char *) (dwz
->str
.buffer
+ str_offset
);
16744 static const char *
16745 read_indirect_string (bfd
*abfd
, const gdb_byte
*buf
,
16746 const struct comp_unit_head
*cu_header
,
16747 unsigned int *bytes_read_ptr
)
16749 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
16751 return read_indirect_string_at_offset (abfd
, str_offset
);
16755 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
16756 unsigned int *bytes_read_ptr
)
16759 unsigned int num_read
;
16761 unsigned char byte
;
16768 byte
= bfd_get_8 (abfd
, buf
);
16771 result
|= ((ULONGEST
) (byte
& 127) << shift
);
16772 if ((byte
& 128) == 0)
16778 *bytes_read_ptr
= num_read
;
16783 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
16784 unsigned int *bytes_read_ptr
)
16787 int shift
, num_read
;
16788 unsigned char byte
;
16795 byte
= bfd_get_8 (abfd
, buf
);
16798 result
|= ((LONGEST
) (byte
& 127) << shift
);
16800 if ((byte
& 128) == 0)
16805 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
16806 result
|= -(((LONGEST
) 1) << shift
);
16807 *bytes_read_ptr
= num_read
;
16811 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
16812 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
16813 ADDR_SIZE is the size of addresses from the CU header. */
16816 read_addr_index_1 (unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
16818 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16819 bfd
*abfd
= objfile
->obfd
;
16820 const gdb_byte
*info_ptr
;
16822 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
16823 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
16824 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
16825 objfile_name (objfile
));
16826 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
16827 error (_("DW_FORM_addr_index pointing outside of "
16828 ".debug_addr section [in module %s]"),
16829 objfile_name (objfile
));
16830 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
16831 + addr_base
+ addr_index
* addr_size
);
16832 if (addr_size
== 4)
16833 return bfd_get_32 (abfd
, info_ptr
);
16835 return bfd_get_64 (abfd
, info_ptr
);
16838 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
16841 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
16843 return read_addr_index_1 (addr_index
, cu
->addr_base
, cu
->header
.addr_size
);
16846 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
16849 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
16850 unsigned int *bytes_read
)
16852 bfd
*abfd
= cu
->objfile
->obfd
;
16853 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
16855 return read_addr_index (cu
, addr_index
);
16858 /* Data structure to pass results from dwarf2_read_addr_index_reader
16859 back to dwarf2_read_addr_index. */
16861 struct dwarf2_read_addr_index_data
16863 ULONGEST addr_base
;
16867 /* die_reader_func for dwarf2_read_addr_index. */
16870 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
16871 const gdb_byte
*info_ptr
,
16872 struct die_info
*comp_unit_die
,
16876 struct dwarf2_cu
*cu
= reader
->cu
;
16877 struct dwarf2_read_addr_index_data
*aidata
=
16878 (struct dwarf2_read_addr_index_data
*) data
;
16880 aidata
->addr_base
= cu
->addr_base
;
16881 aidata
->addr_size
= cu
->header
.addr_size
;
16884 /* Given an index in .debug_addr, fetch the value.
16885 NOTE: This can be called during dwarf expression evaluation,
16886 long after the debug information has been read, and thus per_cu->cu
16887 may no longer exist. */
16890 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
16891 unsigned int addr_index
)
16893 struct objfile
*objfile
= per_cu
->objfile
;
16894 struct dwarf2_cu
*cu
= per_cu
->cu
;
16895 ULONGEST addr_base
;
16898 /* This is intended to be called from outside this file. */
16899 dw2_setup (objfile
);
16901 /* We need addr_base and addr_size.
16902 If we don't have PER_CU->cu, we have to get it.
16903 Nasty, but the alternative is storing the needed info in PER_CU,
16904 which at this point doesn't seem justified: it's not clear how frequently
16905 it would get used and it would increase the size of every PER_CU.
16906 Entry points like dwarf2_per_cu_addr_size do a similar thing
16907 so we're not in uncharted territory here.
16908 Alas we need to be a bit more complicated as addr_base is contained
16911 We don't need to read the entire CU(/TU).
16912 We just need the header and top level die.
16914 IWBN to use the aging mechanism to let us lazily later discard the CU.
16915 For now we skip this optimization. */
16919 addr_base
= cu
->addr_base
;
16920 addr_size
= cu
->header
.addr_size
;
16924 struct dwarf2_read_addr_index_data aidata
;
16926 /* Note: We can't use init_cutu_and_read_dies_simple here,
16927 we need addr_base. */
16928 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
16929 dwarf2_read_addr_index_reader
, &aidata
);
16930 addr_base
= aidata
.addr_base
;
16931 addr_size
= aidata
.addr_size
;
16934 return read_addr_index_1 (addr_index
, addr_base
, addr_size
);
16937 /* Given a DW_FORM_GNU_str_index, fetch the string.
16938 This is only used by the Fission support. */
16940 static const char *
16941 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
16943 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16944 const char *objf_name
= objfile_name (objfile
);
16945 bfd
*abfd
= objfile
->obfd
;
16946 struct dwarf2_cu
*cu
= reader
->cu
;
16947 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
16948 struct dwarf2_section_info
*str_offsets_section
=
16949 &reader
->dwo_file
->sections
.str_offsets
;
16950 const gdb_byte
*info_ptr
;
16951 ULONGEST str_offset
;
16952 static const char form_name
[] = "DW_FORM_GNU_str_index";
16954 dwarf2_read_section (objfile
, str_section
);
16955 dwarf2_read_section (objfile
, str_offsets_section
);
16956 if (str_section
->buffer
== NULL
)
16957 error (_("%s used without .debug_str.dwo section"
16958 " in CU at offset 0x%lx [in module %s]"),
16959 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16960 if (str_offsets_section
->buffer
== NULL
)
16961 error (_("%s used without .debug_str_offsets.dwo section"
16962 " in CU at offset 0x%lx [in module %s]"),
16963 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16964 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
16965 error (_("%s pointing outside of .debug_str_offsets.dwo"
16966 " section in CU at offset 0x%lx [in module %s]"),
16967 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16968 info_ptr
= (str_offsets_section
->buffer
16969 + str_index
* cu
->header
.offset_size
);
16970 if (cu
->header
.offset_size
== 4)
16971 str_offset
= bfd_get_32 (abfd
, info_ptr
);
16973 str_offset
= bfd_get_64 (abfd
, info_ptr
);
16974 if (str_offset
>= str_section
->size
)
16975 error (_("Offset from %s pointing outside of"
16976 " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"),
16977 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16978 return (const char *) (str_section
->buffer
+ str_offset
);
16981 /* Return the length of an LEB128 number in BUF. */
16984 leb128_size (const gdb_byte
*buf
)
16986 const gdb_byte
*begin
= buf
;
16992 if ((byte
& 128) == 0)
16993 return buf
- begin
;
16998 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
17007 cu
->language
= language_c
;
17009 case DW_LANG_C_plus_plus
:
17010 case DW_LANG_C_plus_plus_11
:
17011 case DW_LANG_C_plus_plus_14
:
17012 cu
->language
= language_cplus
;
17015 cu
->language
= language_d
;
17017 case DW_LANG_Fortran77
:
17018 case DW_LANG_Fortran90
:
17019 case DW_LANG_Fortran95
:
17020 case DW_LANG_Fortran03
:
17021 case DW_LANG_Fortran08
:
17022 cu
->language
= language_fortran
;
17025 cu
->language
= language_go
;
17027 case DW_LANG_Mips_Assembler
:
17028 cu
->language
= language_asm
;
17031 cu
->language
= language_java
;
17033 case DW_LANG_Ada83
:
17034 case DW_LANG_Ada95
:
17035 cu
->language
= language_ada
;
17037 case DW_LANG_Modula2
:
17038 cu
->language
= language_m2
;
17040 case DW_LANG_Pascal83
:
17041 cu
->language
= language_pascal
;
17044 cu
->language
= language_objc
;
17047 case DW_LANG_Rust_old
:
17048 cu
->language
= language_rust
;
17050 case DW_LANG_Cobol74
:
17051 case DW_LANG_Cobol85
:
17053 cu
->language
= language_minimal
;
17056 cu
->language_defn
= language_def (cu
->language
);
17059 /* Return the named attribute or NULL if not there. */
17061 static struct attribute
*
17062 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
17067 struct attribute
*spec
= NULL
;
17069 for (i
= 0; i
< die
->num_attrs
; ++i
)
17071 if (die
->attrs
[i
].name
== name
)
17072 return &die
->attrs
[i
];
17073 if (die
->attrs
[i
].name
== DW_AT_specification
17074 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
17075 spec
= &die
->attrs
[i
];
17081 die
= follow_die_ref (die
, spec
, &cu
);
17087 /* Return the named attribute or NULL if not there,
17088 but do not follow DW_AT_specification, etc.
17089 This is for use in contexts where we're reading .debug_types dies.
17090 Following DW_AT_specification, DW_AT_abstract_origin will take us
17091 back up the chain, and we want to go down. */
17093 static struct attribute
*
17094 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
17098 for (i
= 0; i
< die
->num_attrs
; ++i
)
17099 if (die
->attrs
[i
].name
== name
)
17100 return &die
->attrs
[i
];
17105 /* Return the string associated with a string-typed attribute, or NULL if it
17106 is either not found or is of an incorrect type. */
17108 static const char *
17109 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
17111 struct attribute
*attr
;
17112 const char *str
= NULL
;
17114 attr
= dwarf2_attr (die
, name
, cu
);
17118 if (attr
->form
== DW_FORM_strp
|| attr
->form
== DW_FORM_string
17119 || attr
->form
== DW_FORM_GNU_strp_alt
)
17120 str
= DW_STRING (attr
);
17122 complaint (&symfile_complaints
,
17123 _("string type expected for attribute %s for "
17124 "DIE at 0x%x in module %s"),
17125 dwarf_attr_name (name
), die
->offset
.sect_off
,
17126 objfile_name (cu
->objfile
));
17132 /* Return non-zero iff the attribute NAME is defined for the given DIE,
17133 and holds a non-zero value. This function should only be used for
17134 DW_FORM_flag or DW_FORM_flag_present attributes. */
17137 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
17139 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
17141 return (attr
&& DW_UNSND (attr
));
17145 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
17147 /* A DIE is a declaration if it has a DW_AT_declaration attribute
17148 which value is non-zero. However, we have to be careful with
17149 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
17150 (via dwarf2_flag_true_p) follows this attribute. So we may
17151 end up accidently finding a declaration attribute that belongs
17152 to a different DIE referenced by the specification attribute,
17153 even though the given DIE does not have a declaration attribute. */
17154 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
17155 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
17158 /* Return the die giving the specification for DIE, if there is
17159 one. *SPEC_CU is the CU containing DIE on input, and the CU
17160 containing the return value on output. If there is no
17161 specification, but there is an abstract origin, that is
17164 static struct die_info
*
17165 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
17167 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
17170 if (spec_attr
== NULL
)
17171 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
17173 if (spec_attr
== NULL
)
17176 return follow_die_ref (die
, spec_attr
, spec_cu
);
17179 /* Free the line_header structure *LH, and any arrays and strings it
17181 NOTE: This is also used as a "cleanup" function. */
17184 free_line_header (struct line_header
*lh
)
17186 if (lh
->standard_opcode_lengths
)
17187 xfree (lh
->standard_opcode_lengths
);
17189 /* Remember that all the lh->file_names[i].name pointers are
17190 pointers into debug_line_buffer, and don't need to be freed. */
17191 if (lh
->file_names
)
17192 xfree (lh
->file_names
);
17194 /* Similarly for the include directory names. */
17195 if (lh
->include_dirs
)
17196 xfree (lh
->include_dirs
);
17201 /* Stub for free_line_header to match void * callback types. */
17204 free_line_header_voidp (void *arg
)
17206 struct line_header
*lh
= (struct line_header
*) arg
;
17208 free_line_header (lh
);
17211 /* Add an entry to LH's include directory table. */
17214 add_include_dir (struct line_header
*lh
, const char *include_dir
)
17216 if (dwarf_line_debug
>= 2)
17217 fprintf_unfiltered (gdb_stdlog
, "Adding dir %u: %s\n",
17218 lh
->num_include_dirs
+ 1, include_dir
);
17220 /* Grow the array if necessary. */
17221 if (lh
->include_dirs_size
== 0)
17223 lh
->include_dirs_size
= 1; /* for testing */
17224 lh
->include_dirs
= XNEWVEC (const char *, lh
->include_dirs_size
);
17226 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
17228 lh
->include_dirs_size
*= 2;
17229 lh
->include_dirs
= XRESIZEVEC (const char *, lh
->include_dirs
,
17230 lh
->include_dirs_size
);
17233 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
17236 /* Add an entry to LH's file name table. */
17239 add_file_name (struct line_header
*lh
,
17241 unsigned int dir_index
,
17242 unsigned int mod_time
,
17243 unsigned int length
)
17245 struct file_entry
*fe
;
17247 if (dwarf_line_debug
>= 2)
17248 fprintf_unfiltered (gdb_stdlog
, "Adding file %u: %s\n",
17249 lh
->num_file_names
+ 1, name
);
17251 /* Grow the array if necessary. */
17252 if (lh
->file_names_size
== 0)
17254 lh
->file_names_size
= 1; /* for testing */
17255 lh
->file_names
= XNEWVEC (struct file_entry
, lh
->file_names_size
);
17257 else if (lh
->num_file_names
>= lh
->file_names_size
)
17259 lh
->file_names_size
*= 2;
17261 = XRESIZEVEC (struct file_entry
, lh
->file_names
, lh
->file_names_size
);
17264 fe
= &lh
->file_names
[lh
->num_file_names
++];
17266 fe
->dir_index
= dir_index
;
17267 fe
->mod_time
= mod_time
;
17268 fe
->length
= length
;
17269 fe
->included_p
= 0;
17273 /* A convenience function to find the proper .debug_line section for a CU. */
17275 static struct dwarf2_section_info
*
17276 get_debug_line_section (struct dwarf2_cu
*cu
)
17278 struct dwarf2_section_info
*section
;
17280 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
17282 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
17283 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
17284 else if (cu
->per_cu
->is_dwz
)
17286 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
17288 section
= &dwz
->line
;
17291 section
= &dwarf2_per_objfile
->line
;
17296 /* Read the statement program header starting at OFFSET in
17297 .debug_line, or .debug_line.dwo. Return a pointer
17298 to a struct line_header, allocated using xmalloc.
17299 Returns NULL if there is a problem reading the header, e.g., if it
17300 has a version we don't understand.
17302 NOTE: the strings in the include directory and file name tables of
17303 the returned object point into the dwarf line section buffer,
17304 and must not be freed. */
17306 static struct line_header
*
17307 dwarf_decode_line_header (unsigned int offset
, struct dwarf2_cu
*cu
)
17309 struct cleanup
*back_to
;
17310 struct line_header
*lh
;
17311 const gdb_byte
*line_ptr
;
17312 unsigned int bytes_read
, offset_size
;
17314 const char *cur_dir
, *cur_file
;
17315 struct dwarf2_section_info
*section
;
17318 section
= get_debug_line_section (cu
);
17319 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
17320 if (section
->buffer
== NULL
)
17322 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
17323 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
17325 complaint (&symfile_complaints
, _("missing .debug_line section"));
17329 /* We can't do this until we know the section is non-empty.
17330 Only then do we know we have such a section. */
17331 abfd
= get_section_bfd_owner (section
);
17333 /* Make sure that at least there's room for the total_length field.
17334 That could be 12 bytes long, but we're just going to fudge that. */
17335 if (offset
+ 4 >= section
->size
)
17337 dwarf2_statement_list_fits_in_line_number_section_complaint ();
17341 lh
= XNEW (struct line_header
);
17342 memset (lh
, 0, sizeof (*lh
));
17343 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
17346 lh
->offset
.sect_off
= offset
;
17347 lh
->offset_in_dwz
= cu
->per_cu
->is_dwz
;
17349 line_ptr
= section
->buffer
+ offset
;
17351 /* Read in the header. */
17353 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
17354 &bytes_read
, &offset_size
);
17355 line_ptr
+= bytes_read
;
17356 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
17358 dwarf2_statement_list_fits_in_line_number_section_complaint ();
17359 do_cleanups (back_to
);
17362 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
17363 lh
->version
= read_2_bytes (abfd
, line_ptr
);
17365 if (lh
->version
> 4)
17367 /* This is a version we don't understand. The format could have
17368 changed in ways we don't handle properly so just punt. */
17369 complaint (&symfile_complaints
,
17370 _("unsupported version in .debug_line section"));
17373 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
17374 line_ptr
+= offset_size
;
17375 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
17377 if (lh
->version
>= 4)
17379 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
17383 lh
->maximum_ops_per_instruction
= 1;
17385 if (lh
->maximum_ops_per_instruction
== 0)
17387 lh
->maximum_ops_per_instruction
= 1;
17388 complaint (&symfile_complaints
,
17389 _("invalid maximum_ops_per_instruction "
17390 "in `.debug_line' section"));
17393 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
17395 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
17397 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
17399 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
17401 lh
->standard_opcode_lengths
= XNEWVEC (unsigned char, lh
->opcode_base
);
17403 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
17404 for (i
= 1; i
< lh
->opcode_base
; ++i
)
17406 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
17410 /* Read directory table. */
17411 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
17413 line_ptr
+= bytes_read
;
17414 add_include_dir (lh
, cur_dir
);
17416 line_ptr
+= bytes_read
;
17418 /* Read file name table. */
17419 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
17421 unsigned int dir_index
, mod_time
, length
;
17423 line_ptr
+= bytes_read
;
17424 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17425 line_ptr
+= bytes_read
;
17426 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17427 line_ptr
+= bytes_read
;
17428 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17429 line_ptr
+= bytes_read
;
17431 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
17433 line_ptr
+= bytes_read
;
17434 lh
->statement_program_start
= line_ptr
;
17436 if (line_ptr
> (section
->buffer
+ section
->size
))
17437 complaint (&symfile_complaints
,
17438 _("line number info header doesn't "
17439 "fit in `.debug_line' section"));
17441 discard_cleanups (back_to
);
17445 /* Subroutine of dwarf_decode_lines to simplify it.
17446 Return the file name of the psymtab for included file FILE_INDEX
17447 in line header LH of PST.
17448 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
17449 If space for the result is malloc'd, it will be freed by a cleanup.
17450 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename.
17452 The function creates dangling cleanup registration. */
17454 static const char *
17455 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
17456 const struct partial_symtab
*pst
,
17457 const char *comp_dir
)
17459 const struct file_entry fe
= lh
->file_names
[file_index
];
17460 const char *include_name
= fe
.name
;
17461 const char *include_name_to_compare
= include_name
;
17462 const char *dir_name
= NULL
;
17463 const char *pst_filename
;
17464 char *copied_name
= NULL
;
17467 if (fe
.dir_index
&& lh
->include_dirs
!= NULL
)
17468 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
17470 if (!IS_ABSOLUTE_PATH (include_name
)
17471 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
17473 /* Avoid creating a duplicate psymtab for PST.
17474 We do this by comparing INCLUDE_NAME and PST_FILENAME.
17475 Before we do the comparison, however, we need to account
17476 for DIR_NAME and COMP_DIR.
17477 First prepend dir_name (if non-NULL). If we still don't
17478 have an absolute path prepend comp_dir (if non-NULL).
17479 However, the directory we record in the include-file's
17480 psymtab does not contain COMP_DIR (to match the
17481 corresponding symtab(s)).
17486 bash$ gcc -g ./hello.c
17487 include_name = "hello.c"
17489 DW_AT_comp_dir = comp_dir = "/tmp"
17490 DW_AT_name = "./hello.c"
17494 if (dir_name
!= NULL
)
17496 char *tem
= concat (dir_name
, SLASH_STRING
,
17497 include_name
, (char *)NULL
);
17499 make_cleanup (xfree
, tem
);
17500 include_name
= tem
;
17501 include_name_to_compare
= include_name
;
17503 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
17505 char *tem
= concat (comp_dir
, SLASH_STRING
,
17506 include_name
, (char *)NULL
);
17508 make_cleanup (xfree
, tem
);
17509 include_name_to_compare
= tem
;
17513 pst_filename
= pst
->filename
;
17514 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
17516 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
17517 pst_filename
, (char *)NULL
);
17518 pst_filename
= copied_name
;
17521 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
17523 if (copied_name
!= NULL
)
17524 xfree (copied_name
);
17528 return include_name
;
17531 /* State machine to track the state of the line number program. */
17535 /* These are part of the standard DWARF line number state machine. */
17537 unsigned char op_index
;
17542 unsigned int discriminator
;
17544 /* Additional bits of state we need to track. */
17546 /* The last file that we called dwarf2_start_subfile for.
17547 This is only used for TLLs. */
17548 unsigned int last_file
;
17549 /* The last file a line number was recorded for. */
17550 struct subfile
*last_subfile
;
17552 /* The function to call to record a line. */
17553 record_line_ftype
*record_line
;
17555 /* The last line number that was recorded, used to coalesce
17556 consecutive entries for the same line. This can happen, for
17557 example, when discriminators are present. PR 17276. */
17558 unsigned int last_line
;
17559 int line_has_non_zero_discriminator
;
17560 } lnp_state_machine
;
17562 /* There's a lot of static state to pass to dwarf_record_line.
17563 This keeps it all together. */
17568 struct gdbarch
*gdbarch
;
17570 /* The line number header. */
17571 struct line_header
*line_header
;
17573 /* Non-zero if we're recording lines.
17574 Otherwise we're building partial symtabs and are just interested in
17575 finding include files mentioned by the line number program. */
17576 int record_lines_p
;
17577 } lnp_reader_state
;
17579 /* Ignore this record_line request. */
17582 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
17587 /* Return non-zero if we should add LINE to the line number table.
17588 LINE is the line to add, LAST_LINE is the last line that was added,
17589 LAST_SUBFILE is the subfile for LAST_LINE.
17590 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
17591 had a non-zero discriminator.
17593 We have to be careful in the presence of discriminators.
17594 E.g., for this line:
17596 for (i = 0; i < 100000; i++);
17598 clang can emit four line number entries for that one line,
17599 each with a different discriminator.
17600 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
17602 However, we want gdb to coalesce all four entries into one.
17603 Otherwise the user could stepi into the middle of the line and
17604 gdb would get confused about whether the pc really was in the
17605 middle of the line.
17607 Things are further complicated by the fact that two consecutive
17608 line number entries for the same line is a heuristic used by gcc
17609 to denote the end of the prologue. So we can't just discard duplicate
17610 entries, we have to be selective about it. The heuristic we use is
17611 that we only collapse consecutive entries for the same line if at least
17612 one of those entries has a non-zero discriminator. PR 17276.
17614 Note: Addresses in the line number state machine can never go backwards
17615 within one sequence, thus this coalescing is ok. */
17618 dwarf_record_line_p (unsigned int line
, unsigned int last_line
,
17619 int line_has_non_zero_discriminator
,
17620 struct subfile
*last_subfile
)
17622 if (current_subfile
!= last_subfile
)
17624 if (line
!= last_line
)
17626 /* Same line for the same file that we've seen already.
17627 As a last check, for pr 17276, only record the line if the line
17628 has never had a non-zero discriminator. */
17629 if (!line_has_non_zero_discriminator
)
17634 /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS
17635 in the line table of subfile SUBFILE. */
17638 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
17639 unsigned int line
, CORE_ADDR address
,
17640 record_line_ftype p_record_line
)
17642 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
17644 if (dwarf_line_debug
)
17646 fprintf_unfiltered (gdb_stdlog
,
17647 "Recording line %u, file %s, address %s\n",
17648 line
, lbasename (subfile
->name
),
17649 paddress (gdbarch
, address
));
17652 (*p_record_line
) (subfile
, line
, addr
);
17655 /* Subroutine of dwarf_decode_lines_1 to simplify it.
17656 Mark the end of a set of line number records.
17657 The arguments are the same as for dwarf_record_line_1.
17658 If SUBFILE is NULL the request is ignored. */
17661 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
17662 CORE_ADDR address
, record_line_ftype p_record_line
)
17664 if (subfile
== NULL
)
17667 if (dwarf_line_debug
)
17669 fprintf_unfiltered (gdb_stdlog
,
17670 "Finishing current line, file %s, address %s\n",
17671 lbasename (subfile
->name
),
17672 paddress (gdbarch
, address
));
17675 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, p_record_line
);
17678 /* Record the line in STATE.
17679 END_SEQUENCE is non-zero if we're processing the end of a sequence. */
17682 dwarf_record_line (lnp_reader_state
*reader
, lnp_state_machine
*state
,
17685 const struct line_header
*lh
= reader
->line_header
;
17686 unsigned int file
, line
, discriminator
;
17689 file
= state
->file
;
17690 line
= state
->line
;
17691 is_stmt
= state
->is_stmt
;
17692 discriminator
= state
->discriminator
;
17694 if (dwarf_line_debug
)
17696 fprintf_unfiltered (gdb_stdlog
,
17697 "Processing actual line %u: file %u,"
17698 " address %s, is_stmt %u, discrim %u\n",
17700 paddress (reader
->gdbarch
, state
->address
),
17701 is_stmt
, discriminator
);
17704 if (file
== 0 || file
- 1 >= lh
->num_file_names
)
17705 dwarf2_debug_line_missing_file_complaint ();
17706 /* For now we ignore lines not starting on an instruction boundary.
17707 But not when processing end_sequence for compatibility with the
17708 previous version of the code. */
17709 else if (state
->op_index
== 0 || end_sequence
)
17711 lh
->file_names
[file
- 1].included_p
= 1;
17712 if (reader
->record_lines_p
&& is_stmt
)
17714 if (state
->last_subfile
!= current_subfile
|| end_sequence
)
17716 dwarf_finish_line (reader
->gdbarch
, state
->last_subfile
,
17717 state
->address
, state
->record_line
);
17722 if (dwarf_record_line_p (line
, state
->last_line
,
17723 state
->line_has_non_zero_discriminator
,
17724 state
->last_subfile
))
17726 dwarf_record_line_1 (reader
->gdbarch
, current_subfile
,
17727 line
, state
->address
,
17728 state
->record_line
);
17730 state
->last_subfile
= current_subfile
;
17731 state
->last_line
= line
;
17737 /* Initialize STATE for the start of a line number program. */
17740 init_lnp_state_machine (lnp_state_machine
*state
,
17741 const lnp_reader_state
*reader
)
17743 memset (state
, 0, sizeof (*state
));
17745 /* Just starting, there is no "last file". */
17746 state
->last_file
= 0;
17747 state
->last_subfile
= NULL
;
17749 state
->record_line
= record_line
;
17751 state
->last_line
= 0;
17752 state
->line_has_non_zero_discriminator
= 0;
17754 /* Initialize these according to the DWARF spec. */
17755 state
->op_index
= 0;
17758 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
17759 was a line entry for it so that the backend has a chance to adjust it
17760 and also record it in case it needs it. This is currently used by MIPS
17761 code, cf. `mips_adjust_dwarf2_line'. */
17762 state
->address
= gdbarch_adjust_dwarf2_line (reader
->gdbarch
, 0, 0);
17763 state
->is_stmt
= reader
->line_header
->default_is_stmt
;
17764 state
->discriminator
= 0;
17767 /* Check address and if invalid nop-out the rest of the lines in this
17771 check_line_address (struct dwarf2_cu
*cu
, lnp_state_machine
*state
,
17772 const gdb_byte
*line_ptr
,
17773 CORE_ADDR lowpc
, CORE_ADDR address
)
17775 /* If address < lowpc then it's not a usable value, it's outside the
17776 pc range of the CU. However, we restrict the test to only address
17777 values of zero to preserve GDB's previous behaviour which is to
17778 handle the specific case of a function being GC'd by the linker. */
17780 if (address
== 0 && address
< lowpc
)
17782 /* This line table is for a function which has been
17783 GCd by the linker. Ignore it. PR gdb/12528 */
17785 struct objfile
*objfile
= cu
->objfile
;
17786 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
17788 complaint (&symfile_complaints
,
17789 _(".debug_line address at offset 0x%lx is 0 [in module %s]"),
17790 line_offset
, objfile_name (objfile
));
17791 state
->record_line
= noop_record_line
;
17792 /* Note: sm.record_line is left as noop_record_line
17793 until we see DW_LNE_end_sequence. */
17797 /* Subroutine of dwarf_decode_lines to simplify it.
17798 Process the line number information in LH.
17799 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
17800 program in order to set included_p for every referenced header. */
17803 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
17804 const int decode_for_pst_p
, CORE_ADDR lowpc
)
17806 const gdb_byte
*line_ptr
, *extended_end
;
17807 const gdb_byte
*line_end
;
17808 unsigned int bytes_read
, extended_len
;
17809 unsigned char op_code
, extended_op
;
17810 CORE_ADDR baseaddr
;
17811 struct objfile
*objfile
= cu
->objfile
;
17812 bfd
*abfd
= objfile
->obfd
;
17813 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17814 /* Non-zero if we're recording line info (as opposed to building partial
17816 int record_lines_p
= !decode_for_pst_p
;
17817 /* A collection of things we need to pass to dwarf_record_line. */
17818 lnp_reader_state reader_state
;
17820 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
17822 line_ptr
= lh
->statement_program_start
;
17823 line_end
= lh
->statement_program_end
;
17825 reader_state
.gdbarch
= gdbarch
;
17826 reader_state
.line_header
= lh
;
17827 reader_state
.record_lines_p
= record_lines_p
;
17829 /* Read the statement sequences until there's nothing left. */
17830 while (line_ptr
< line_end
)
17832 /* The DWARF line number program state machine. */
17833 lnp_state_machine state_machine
;
17834 int end_sequence
= 0;
17836 /* Reset the state machine at the start of each sequence. */
17837 init_lnp_state_machine (&state_machine
, &reader_state
);
17839 if (record_lines_p
&& lh
->num_file_names
>= state_machine
.file
)
17841 /* Start a subfile for the current file of the state machine. */
17842 /* lh->include_dirs and lh->file_names are 0-based, but the
17843 directory and file name numbers in the statement program
17845 struct file_entry
*fe
= &lh
->file_names
[state_machine
.file
- 1];
17846 const char *dir
= NULL
;
17848 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
17849 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17851 dwarf2_start_subfile (fe
->name
, dir
);
17854 /* Decode the table. */
17855 while (line_ptr
< line_end
&& !end_sequence
)
17857 op_code
= read_1_byte (abfd
, line_ptr
);
17860 if (op_code
>= lh
->opcode_base
)
17862 /* Special opcode. */
17863 unsigned char adj_opcode
;
17864 CORE_ADDR addr_adj
;
17867 adj_opcode
= op_code
- lh
->opcode_base
;
17868 addr_adj
= (((state_machine
.op_index
17869 + (adj_opcode
/ lh
->line_range
))
17870 / lh
->maximum_ops_per_instruction
)
17871 * lh
->minimum_instruction_length
);
17872 state_machine
.address
17873 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17874 state_machine
.op_index
= ((state_machine
.op_index
17875 + (adj_opcode
/ lh
->line_range
))
17876 % lh
->maximum_ops_per_instruction
);
17877 line_delta
= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
17878 state_machine
.line
+= line_delta
;
17879 if (line_delta
!= 0)
17880 state_machine
.line_has_non_zero_discriminator
17881 = state_machine
.discriminator
!= 0;
17883 dwarf_record_line (&reader_state
, &state_machine
, 0);
17884 state_machine
.discriminator
= 0;
17886 else switch (op_code
)
17888 case DW_LNS_extended_op
:
17889 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
17891 line_ptr
+= bytes_read
;
17892 extended_end
= line_ptr
+ extended_len
;
17893 extended_op
= read_1_byte (abfd
, line_ptr
);
17895 switch (extended_op
)
17897 case DW_LNE_end_sequence
:
17898 state_machine
.record_line
= record_line
;
17901 case DW_LNE_set_address
:
17904 = read_address (abfd
, line_ptr
, cu
, &bytes_read
);
17906 line_ptr
+= bytes_read
;
17907 check_line_address (cu
, &state_machine
, line_ptr
,
17909 state_machine
.op_index
= 0;
17910 address
+= baseaddr
;
17911 state_machine
.address
17912 = gdbarch_adjust_dwarf2_line (gdbarch
, address
, 0);
17915 case DW_LNE_define_file
:
17917 const char *cur_file
;
17918 unsigned int dir_index
, mod_time
, length
;
17920 cur_file
= read_direct_string (abfd
, line_ptr
,
17922 line_ptr
+= bytes_read
;
17924 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17925 line_ptr
+= bytes_read
;
17927 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17928 line_ptr
+= bytes_read
;
17930 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17931 line_ptr
+= bytes_read
;
17932 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
17935 case DW_LNE_set_discriminator
:
17936 /* The discriminator is not interesting to the debugger;
17937 just ignore it. We still need to check its value though:
17938 if there are consecutive entries for the same
17939 (non-prologue) line we want to coalesce them.
17941 state_machine
.discriminator
17942 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17943 state_machine
.line_has_non_zero_discriminator
17944 |= state_machine
.discriminator
!= 0;
17945 line_ptr
+= bytes_read
;
17948 complaint (&symfile_complaints
,
17949 _("mangled .debug_line section"));
17952 /* Make sure that we parsed the extended op correctly. If e.g.
17953 we expected a different address size than the producer used,
17954 we may have read the wrong number of bytes. */
17955 if (line_ptr
!= extended_end
)
17957 complaint (&symfile_complaints
,
17958 _("mangled .debug_line section"));
17963 dwarf_record_line (&reader_state
, &state_machine
, 0);
17964 state_machine
.discriminator
= 0;
17966 case DW_LNS_advance_pc
:
17969 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17970 CORE_ADDR addr_adj
;
17972 addr_adj
= (((state_machine
.op_index
+ adjust
)
17973 / lh
->maximum_ops_per_instruction
)
17974 * lh
->minimum_instruction_length
);
17975 state_machine
.address
17976 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17977 state_machine
.op_index
= ((state_machine
.op_index
+ adjust
)
17978 % lh
->maximum_ops_per_instruction
);
17979 line_ptr
+= bytes_read
;
17982 case DW_LNS_advance_line
:
17985 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
17987 state_machine
.line
+= line_delta
;
17988 if (line_delta
!= 0)
17989 state_machine
.line_has_non_zero_discriminator
17990 = state_machine
.discriminator
!= 0;
17991 line_ptr
+= bytes_read
;
17994 case DW_LNS_set_file
:
17996 /* The arrays lh->include_dirs and lh->file_names are
17997 0-based, but the directory and file name numbers in
17998 the statement program are 1-based. */
17999 struct file_entry
*fe
;
18000 const char *dir
= NULL
;
18002 state_machine
.file
= read_unsigned_leb128 (abfd
, line_ptr
,
18004 line_ptr
+= bytes_read
;
18005 if (state_machine
.file
== 0
18006 || state_machine
.file
- 1 >= lh
->num_file_names
)
18007 dwarf2_debug_line_missing_file_complaint ();
18010 fe
= &lh
->file_names
[state_machine
.file
- 1];
18011 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
18012 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
18013 if (record_lines_p
)
18015 state_machine
.last_subfile
= current_subfile
;
18016 state_machine
.line_has_non_zero_discriminator
18017 = state_machine
.discriminator
!= 0;
18018 dwarf2_start_subfile (fe
->name
, dir
);
18023 case DW_LNS_set_column
:
18024 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18025 line_ptr
+= bytes_read
;
18027 case DW_LNS_negate_stmt
:
18028 state_machine
.is_stmt
= (!state_machine
.is_stmt
);
18030 case DW_LNS_set_basic_block
:
18032 /* Add to the address register of the state machine the
18033 address increment value corresponding to special opcode
18034 255. I.e., this value is scaled by the minimum
18035 instruction length since special opcode 255 would have
18036 scaled the increment. */
18037 case DW_LNS_const_add_pc
:
18039 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
18040 CORE_ADDR addr_adj
;
18042 addr_adj
= (((state_machine
.op_index
+ adjust
)
18043 / lh
->maximum_ops_per_instruction
)
18044 * lh
->minimum_instruction_length
);
18045 state_machine
.address
18046 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
18047 state_machine
.op_index
= ((state_machine
.op_index
+ adjust
)
18048 % lh
->maximum_ops_per_instruction
);
18051 case DW_LNS_fixed_advance_pc
:
18053 CORE_ADDR addr_adj
;
18055 addr_adj
= read_2_bytes (abfd
, line_ptr
);
18056 state_machine
.address
18057 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
18058 state_machine
.op_index
= 0;
18064 /* Unknown standard opcode, ignore it. */
18067 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
18069 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18070 line_ptr
+= bytes_read
;
18077 dwarf2_debug_line_missing_end_sequence_complaint ();
18079 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
18080 in which case we still finish recording the last line). */
18081 dwarf_record_line (&reader_state
, &state_machine
, 1);
18085 /* Decode the Line Number Program (LNP) for the given line_header
18086 structure and CU. The actual information extracted and the type
18087 of structures created from the LNP depends on the value of PST.
18089 1. If PST is NULL, then this procedure uses the data from the program
18090 to create all necessary symbol tables, and their linetables.
18092 2. If PST is not NULL, this procedure reads the program to determine
18093 the list of files included by the unit represented by PST, and
18094 builds all the associated partial symbol tables.
18096 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
18097 It is used for relative paths in the line table.
18098 NOTE: When processing partial symtabs (pst != NULL),
18099 comp_dir == pst->dirname.
18101 NOTE: It is important that psymtabs have the same file name (via strcmp)
18102 as the corresponding symtab. Since COMP_DIR is not used in the name of the
18103 symtab we don't use it in the name of the psymtabs we create.
18104 E.g. expand_line_sal requires this when finding psymtabs to expand.
18105 A good testcase for this is mb-inline.exp.
18107 LOWPC is the lowest address in CU (or 0 if not known).
18109 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
18110 for its PC<->lines mapping information. Otherwise only the filename
18111 table is read in. */
18114 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
18115 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
18116 CORE_ADDR lowpc
, int decode_mapping
)
18118 struct objfile
*objfile
= cu
->objfile
;
18119 const int decode_for_pst_p
= (pst
!= NULL
);
18121 if (decode_mapping
)
18122 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
18124 if (decode_for_pst_p
)
18128 /* Now that we're done scanning the Line Header Program, we can
18129 create the psymtab of each included file. */
18130 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
18131 if (lh
->file_names
[file_index
].included_p
== 1)
18133 const char *include_name
=
18134 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
18135 if (include_name
!= NULL
)
18136 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
18141 /* Make sure a symtab is created for every file, even files
18142 which contain only variables (i.e. no code with associated
18144 struct compunit_symtab
*cust
= buildsym_compunit_symtab ();
18147 for (i
= 0; i
< lh
->num_file_names
; i
++)
18149 const char *dir
= NULL
;
18150 struct file_entry
*fe
;
18152 fe
= &lh
->file_names
[i
];
18153 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
18154 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
18155 dwarf2_start_subfile (fe
->name
, dir
);
18157 if (current_subfile
->symtab
== NULL
)
18159 current_subfile
->symtab
18160 = allocate_symtab (cust
, current_subfile
->name
);
18162 fe
->symtab
= current_subfile
->symtab
;
18167 /* Start a subfile for DWARF. FILENAME is the name of the file and
18168 DIRNAME the name of the source directory which contains FILENAME
18169 or NULL if not known.
18170 This routine tries to keep line numbers from identical absolute and
18171 relative file names in a common subfile.
18173 Using the `list' example from the GDB testsuite, which resides in
18174 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
18175 of /srcdir/list0.c yields the following debugging information for list0.c:
18177 DW_AT_name: /srcdir/list0.c
18178 DW_AT_comp_dir: /compdir
18179 files.files[0].name: list0.h
18180 files.files[0].dir: /srcdir
18181 files.files[1].name: list0.c
18182 files.files[1].dir: /srcdir
18184 The line number information for list0.c has to end up in a single
18185 subfile, so that `break /srcdir/list0.c:1' works as expected.
18186 start_subfile will ensure that this happens provided that we pass the
18187 concatenation of files.files[1].dir and files.files[1].name as the
18191 dwarf2_start_subfile (const char *filename
, const char *dirname
)
18195 /* In order not to lose the line information directory,
18196 we concatenate it to the filename when it makes sense.
18197 Note that the Dwarf3 standard says (speaking of filenames in line
18198 information): ``The directory index is ignored for file names
18199 that represent full path names''. Thus ignoring dirname in the
18200 `else' branch below isn't an issue. */
18202 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
18204 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
18208 start_subfile (filename
);
18214 /* Start a symtab for DWARF.
18215 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
18217 static struct compunit_symtab
*
18218 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
18219 const char *name
, const char *comp_dir
, CORE_ADDR low_pc
)
18221 struct compunit_symtab
*cust
18222 = start_symtab (cu
->objfile
, name
, comp_dir
, low_pc
);
18224 record_debugformat ("DWARF 2");
18225 record_producer (cu
->producer
);
18227 /* We assume that we're processing GCC output. */
18228 processing_gcc_compilation
= 2;
18230 cu
->processing_has_namespace_info
= 0;
18236 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
18237 struct dwarf2_cu
*cu
)
18239 struct objfile
*objfile
= cu
->objfile
;
18240 struct comp_unit_head
*cu_header
= &cu
->header
;
18242 /* NOTE drow/2003-01-30: There used to be a comment and some special
18243 code here to turn a symbol with DW_AT_external and a
18244 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
18245 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
18246 with some versions of binutils) where shared libraries could have
18247 relocations against symbols in their debug information - the
18248 minimal symbol would have the right address, but the debug info
18249 would not. It's no longer necessary, because we will explicitly
18250 apply relocations when we read in the debug information now. */
18252 /* A DW_AT_location attribute with no contents indicates that a
18253 variable has been optimized away. */
18254 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
18256 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
18260 /* Handle one degenerate form of location expression specially, to
18261 preserve GDB's previous behavior when section offsets are
18262 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
18263 then mark this symbol as LOC_STATIC. */
18265 if (attr_form_is_block (attr
)
18266 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
18267 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
18268 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
18269 && (DW_BLOCK (attr
)->size
18270 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
18272 unsigned int dummy
;
18274 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
18275 SYMBOL_VALUE_ADDRESS (sym
) =
18276 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
18278 SYMBOL_VALUE_ADDRESS (sym
) =
18279 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
18280 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
18281 fixup_symbol_section (sym
, objfile
);
18282 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
18283 SYMBOL_SECTION (sym
));
18287 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
18288 expression evaluator, and use LOC_COMPUTED only when necessary
18289 (i.e. when the value of a register or memory location is
18290 referenced, or a thread-local block, etc.). Then again, it might
18291 not be worthwhile. I'm assuming that it isn't unless performance
18292 or memory numbers show me otherwise. */
18294 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
18296 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
18297 cu
->has_loclist
= 1;
18300 /* Given a pointer to a DWARF information entry, figure out if we need
18301 to make a symbol table entry for it, and if so, create a new entry
18302 and return a pointer to it.
18303 If TYPE is NULL, determine symbol type from the die, otherwise
18304 used the passed type.
18305 If SPACE is not NULL, use it to hold the new symbol. If it is
18306 NULL, allocate a new symbol on the objfile's obstack. */
18308 static struct symbol
*
18309 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
18310 struct symbol
*space
)
18312 struct objfile
*objfile
= cu
->objfile
;
18313 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18314 struct symbol
*sym
= NULL
;
18316 struct attribute
*attr
= NULL
;
18317 struct attribute
*attr2
= NULL
;
18318 CORE_ADDR baseaddr
;
18319 struct pending
**list_to_add
= NULL
;
18321 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
18323 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
18325 name
= dwarf2_name (die
, cu
);
18328 const char *linkagename
;
18329 int suppress_add
= 0;
18334 sym
= allocate_symbol (objfile
);
18335 OBJSTAT (objfile
, n_syms
++);
18337 /* Cache this symbol's name and the name's demangled form (if any). */
18338 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
18339 linkagename
= dwarf2_physname (name
, die
, cu
);
18340 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
18342 /* Fortran does not have mangling standard and the mangling does differ
18343 between gfortran, iFort etc. */
18344 if (cu
->language
== language_fortran
18345 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
18346 symbol_set_demangled_name (&(sym
->ginfo
),
18347 dwarf2_full_name (name
, die
, cu
),
18350 /* Default assumptions.
18351 Use the passed type or decode it from the die. */
18352 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18353 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
18355 SYMBOL_TYPE (sym
) = type
;
18357 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
18358 attr
= dwarf2_attr (die
,
18359 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
18363 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
18366 attr
= dwarf2_attr (die
,
18367 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
18371 int file_index
= DW_UNSND (attr
);
18373 if (cu
->line_header
== NULL
18374 || file_index
> cu
->line_header
->num_file_names
)
18375 complaint (&symfile_complaints
,
18376 _("file index out of range"));
18377 else if (file_index
> 0)
18379 struct file_entry
*fe
;
18381 fe
= &cu
->line_header
->file_names
[file_index
- 1];
18382 symbol_set_symtab (sym
, fe
->symtab
);
18389 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
18394 addr
= attr_value_as_address (attr
);
18395 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
18396 SYMBOL_VALUE_ADDRESS (sym
) = addr
;
18398 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
18399 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
18400 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
18401 add_symbol_to_list (sym
, cu
->list_in_scope
);
18403 case DW_TAG_subprogram
:
18404 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
18406 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
18407 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18408 if ((attr2
&& (DW_UNSND (attr2
) != 0))
18409 || cu
->language
== language_ada
)
18411 /* Subprograms marked external are stored as a global symbol.
18412 Ada subprograms, whether marked external or not, are always
18413 stored as a global symbol, because we want to be able to
18414 access them globally. For instance, we want to be able
18415 to break on a nested subprogram without having to
18416 specify the context. */
18417 list_to_add
= &global_symbols
;
18421 list_to_add
= cu
->list_in_scope
;
18424 case DW_TAG_inlined_subroutine
:
18425 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
18427 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
18428 SYMBOL_INLINED (sym
) = 1;
18429 list_to_add
= cu
->list_in_scope
;
18431 case DW_TAG_template_value_param
:
18433 /* Fall through. */
18434 case DW_TAG_constant
:
18435 case DW_TAG_variable
:
18436 case DW_TAG_member
:
18437 /* Compilation with minimal debug info may result in
18438 variables with missing type entries. Change the
18439 misleading `void' type to something sensible. */
18440 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
18442 = objfile_type (objfile
)->nodebug_data_symbol
;
18444 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18445 /* In the case of DW_TAG_member, we should only be called for
18446 static const members. */
18447 if (die
->tag
== DW_TAG_member
)
18449 /* dwarf2_add_field uses die_is_declaration,
18450 so we do the same. */
18451 gdb_assert (die_is_declaration (die
, cu
));
18456 dwarf2_const_value (attr
, sym
, cu
);
18457 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18460 if (attr2
&& (DW_UNSND (attr2
) != 0))
18461 list_to_add
= &global_symbols
;
18463 list_to_add
= cu
->list_in_scope
;
18467 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
18470 var_decode_location (attr
, sym
, cu
);
18471 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18473 /* Fortran explicitly imports any global symbols to the local
18474 scope by DW_TAG_common_block. */
18475 if (cu
->language
== language_fortran
&& die
->parent
18476 && die
->parent
->tag
== DW_TAG_common_block
)
18479 if (SYMBOL_CLASS (sym
) == LOC_STATIC
18480 && SYMBOL_VALUE_ADDRESS (sym
) == 0
18481 && !dwarf2_per_objfile
->has_section_at_zero
)
18483 /* When a static variable is eliminated by the linker,
18484 the corresponding debug information is not stripped
18485 out, but the variable address is set to null;
18486 do not add such variables into symbol table. */
18488 else if (attr2
&& (DW_UNSND (attr2
) != 0))
18490 /* Workaround gfortran PR debug/40040 - it uses
18491 DW_AT_location for variables in -fPIC libraries which may
18492 get overriden by other libraries/executable and get
18493 a different address. Resolve it by the minimal symbol
18494 which may come from inferior's executable using copy
18495 relocation. Make this workaround only for gfortran as for
18496 other compilers GDB cannot guess the minimal symbol
18497 Fortran mangling kind. */
18498 if (cu
->language
== language_fortran
&& die
->parent
18499 && die
->parent
->tag
== DW_TAG_module
18501 && startswith (cu
->producer
, "GNU Fortran"))
18502 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
18504 /* A variable with DW_AT_external is never static,
18505 but it may be block-scoped. */
18506 list_to_add
= (cu
->list_in_scope
== &file_symbols
18507 ? &global_symbols
: cu
->list_in_scope
);
18510 list_to_add
= cu
->list_in_scope
;
18514 /* We do not know the address of this symbol.
18515 If it is an external symbol and we have type information
18516 for it, enter the symbol as a LOC_UNRESOLVED symbol.
18517 The address of the variable will then be determined from
18518 the minimal symbol table whenever the variable is
18520 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18522 /* Fortran explicitly imports any global symbols to the local
18523 scope by DW_TAG_common_block. */
18524 if (cu
->language
== language_fortran
&& die
->parent
18525 && die
->parent
->tag
== DW_TAG_common_block
)
18527 /* SYMBOL_CLASS doesn't matter here because
18528 read_common_block is going to reset it. */
18530 list_to_add
= cu
->list_in_scope
;
18532 else if (attr2
&& (DW_UNSND (attr2
) != 0)
18533 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
18535 /* A variable with DW_AT_external is never static, but it
18536 may be block-scoped. */
18537 list_to_add
= (cu
->list_in_scope
== &file_symbols
18538 ? &global_symbols
: cu
->list_in_scope
);
18540 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
18542 else if (!die_is_declaration (die
, cu
))
18544 /* Use the default LOC_OPTIMIZED_OUT class. */
18545 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
18547 list_to_add
= cu
->list_in_scope
;
18551 case DW_TAG_formal_parameter
:
18552 /* If we are inside a function, mark this as an argument. If
18553 not, we might be looking at an argument to an inlined function
18554 when we do not have enough information to show inlined frames;
18555 pretend it's a local variable in that case so that the user can
18557 if (context_stack_depth
> 0
18558 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
18559 SYMBOL_IS_ARGUMENT (sym
) = 1;
18560 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
18563 var_decode_location (attr
, sym
, cu
);
18565 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18568 dwarf2_const_value (attr
, sym
, cu
);
18571 list_to_add
= cu
->list_in_scope
;
18573 case DW_TAG_unspecified_parameters
:
18574 /* From varargs functions; gdb doesn't seem to have any
18575 interest in this information, so just ignore it for now.
18578 case DW_TAG_template_type_param
:
18580 /* Fall through. */
18581 case DW_TAG_class_type
:
18582 case DW_TAG_interface_type
:
18583 case DW_TAG_structure_type
:
18584 case DW_TAG_union_type
:
18585 case DW_TAG_set_type
:
18586 case DW_TAG_enumeration_type
:
18587 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18588 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
18591 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
18592 really ever be static objects: otherwise, if you try
18593 to, say, break of a class's method and you're in a file
18594 which doesn't mention that class, it won't work unless
18595 the check for all static symbols in lookup_symbol_aux
18596 saves you. See the OtherFileClass tests in
18597 gdb.c++/namespace.exp. */
18601 list_to_add
= (cu
->list_in_scope
== &file_symbols
18602 && (cu
->language
== language_cplus
18603 || cu
->language
== language_java
)
18604 ? &global_symbols
: cu
->list_in_scope
);
18606 /* The semantics of C++ state that "struct foo {
18607 ... }" also defines a typedef for "foo". A Java
18608 class declaration also defines a typedef for the
18610 if (cu
->language
== language_cplus
18611 || cu
->language
== language_java
18612 || cu
->language
== language_ada
18613 || cu
->language
== language_d
18614 || cu
->language
== language_rust
)
18616 /* The symbol's name is already allocated along
18617 with this objfile, so we don't need to
18618 duplicate it for the type. */
18619 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
18620 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
18625 case DW_TAG_typedef
:
18626 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18627 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18628 list_to_add
= cu
->list_in_scope
;
18630 case DW_TAG_base_type
:
18631 case DW_TAG_subrange_type
:
18632 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18633 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18634 list_to_add
= cu
->list_in_scope
;
18636 case DW_TAG_enumerator
:
18637 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18640 dwarf2_const_value (attr
, sym
, cu
);
18643 /* NOTE: carlton/2003-11-10: See comment above in the
18644 DW_TAG_class_type, etc. block. */
18646 list_to_add
= (cu
->list_in_scope
== &file_symbols
18647 && (cu
->language
== language_cplus
18648 || cu
->language
== language_java
)
18649 ? &global_symbols
: cu
->list_in_scope
);
18652 case DW_TAG_imported_declaration
:
18653 case DW_TAG_namespace
:
18654 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18655 list_to_add
= &global_symbols
;
18657 case DW_TAG_module
:
18658 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18659 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
18660 list_to_add
= &global_symbols
;
18662 case DW_TAG_common_block
:
18663 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
18664 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
18665 add_symbol_to_list (sym
, cu
->list_in_scope
);
18668 /* Not a tag we recognize. Hopefully we aren't processing
18669 trash data, but since we must specifically ignore things
18670 we don't recognize, there is nothing else we should do at
18672 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
18673 dwarf_tag_name (die
->tag
));
18679 sym
->hash_next
= objfile
->template_symbols
;
18680 objfile
->template_symbols
= sym
;
18681 list_to_add
= NULL
;
18684 if (list_to_add
!= NULL
)
18685 add_symbol_to_list (sym
, list_to_add
);
18687 /* For the benefit of old versions of GCC, check for anonymous
18688 namespaces based on the demangled name. */
18689 if (!cu
->processing_has_namespace_info
18690 && cu
->language
== language_cplus
)
18691 cp_scan_for_anonymous_namespaces (sym
, objfile
);
18696 /* A wrapper for new_symbol_full that always allocates a new symbol. */
18698 static struct symbol
*
18699 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
18701 return new_symbol_full (die
, type
, cu
, NULL
);
18704 /* Given an attr with a DW_FORM_dataN value in host byte order,
18705 zero-extend it as appropriate for the symbol's type. The DWARF
18706 standard (v4) is not entirely clear about the meaning of using
18707 DW_FORM_dataN for a constant with a signed type, where the type is
18708 wider than the data. The conclusion of a discussion on the DWARF
18709 list was that this is unspecified. We choose to always zero-extend
18710 because that is the interpretation long in use by GCC. */
18713 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
18714 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
18716 struct objfile
*objfile
= cu
->objfile
;
18717 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
18718 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
18719 LONGEST l
= DW_UNSND (attr
);
18721 if (bits
< sizeof (*value
) * 8)
18723 l
&= ((LONGEST
) 1 << bits
) - 1;
18726 else if (bits
== sizeof (*value
) * 8)
18730 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
18731 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
18738 /* Read a constant value from an attribute. Either set *VALUE, or if
18739 the value does not fit in *VALUE, set *BYTES - either already
18740 allocated on the objfile obstack, or newly allocated on OBSTACK,
18741 or, set *BATON, if we translated the constant to a location
18745 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
18746 const char *name
, struct obstack
*obstack
,
18747 struct dwarf2_cu
*cu
,
18748 LONGEST
*value
, const gdb_byte
**bytes
,
18749 struct dwarf2_locexpr_baton
**baton
)
18751 struct objfile
*objfile
= cu
->objfile
;
18752 struct comp_unit_head
*cu_header
= &cu
->header
;
18753 struct dwarf_block
*blk
;
18754 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
18755 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
18761 switch (attr
->form
)
18764 case DW_FORM_GNU_addr_index
:
18768 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
18769 dwarf2_const_value_length_mismatch_complaint (name
,
18770 cu_header
->addr_size
,
18771 TYPE_LENGTH (type
));
18772 /* Symbols of this form are reasonably rare, so we just
18773 piggyback on the existing location code rather than writing
18774 a new implementation of symbol_computed_ops. */
18775 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
18776 (*baton
)->per_cu
= cu
->per_cu
;
18777 gdb_assert ((*baton
)->per_cu
);
18779 (*baton
)->size
= 2 + cu_header
->addr_size
;
18780 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
18781 (*baton
)->data
= data
;
18783 data
[0] = DW_OP_addr
;
18784 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
18785 byte_order
, DW_ADDR (attr
));
18786 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
18789 case DW_FORM_string
:
18791 case DW_FORM_GNU_str_index
:
18792 case DW_FORM_GNU_strp_alt
:
18793 /* DW_STRING is already allocated on the objfile obstack, point
18795 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
18797 case DW_FORM_block1
:
18798 case DW_FORM_block2
:
18799 case DW_FORM_block4
:
18800 case DW_FORM_block
:
18801 case DW_FORM_exprloc
:
18802 blk
= DW_BLOCK (attr
);
18803 if (TYPE_LENGTH (type
) != blk
->size
)
18804 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
18805 TYPE_LENGTH (type
));
18806 *bytes
= blk
->data
;
18809 /* The DW_AT_const_value attributes are supposed to carry the
18810 symbol's value "represented as it would be on the target
18811 architecture." By the time we get here, it's already been
18812 converted to host endianness, so we just need to sign- or
18813 zero-extend it as appropriate. */
18814 case DW_FORM_data1
:
18815 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
18817 case DW_FORM_data2
:
18818 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
18820 case DW_FORM_data4
:
18821 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
18823 case DW_FORM_data8
:
18824 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
18827 case DW_FORM_sdata
:
18828 *value
= DW_SND (attr
);
18831 case DW_FORM_udata
:
18832 *value
= DW_UNSND (attr
);
18836 complaint (&symfile_complaints
,
18837 _("unsupported const value attribute form: '%s'"),
18838 dwarf_form_name (attr
->form
));
18845 /* Copy constant value from an attribute to a symbol. */
18848 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
18849 struct dwarf2_cu
*cu
)
18851 struct objfile
*objfile
= cu
->objfile
;
18853 const gdb_byte
*bytes
;
18854 struct dwarf2_locexpr_baton
*baton
;
18856 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
18857 SYMBOL_PRINT_NAME (sym
),
18858 &objfile
->objfile_obstack
, cu
,
18859 &value
, &bytes
, &baton
);
18863 SYMBOL_LOCATION_BATON (sym
) = baton
;
18864 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
18866 else if (bytes
!= NULL
)
18868 SYMBOL_VALUE_BYTES (sym
) = bytes
;
18869 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
18873 SYMBOL_VALUE (sym
) = value
;
18874 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
18878 /* Return the type of the die in question using its DW_AT_type attribute. */
18880 static struct type
*
18881 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18883 struct attribute
*type_attr
;
18885 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
18888 /* A missing DW_AT_type represents a void type. */
18889 return objfile_type (cu
->objfile
)->builtin_void
;
18892 return lookup_die_type (die
, type_attr
, cu
);
18895 /* True iff CU's producer generates GNAT Ada auxiliary information
18896 that allows to find parallel types through that information instead
18897 of having to do expensive parallel lookups by type name. */
18900 need_gnat_info (struct dwarf2_cu
*cu
)
18902 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
18903 of GNAT produces this auxiliary information, without any indication
18904 that it is produced. Part of enhancing the FSF version of GNAT
18905 to produce that information will be to put in place an indicator
18906 that we can use in order to determine whether the descriptive type
18907 info is available or not. One suggestion that has been made is
18908 to use a new attribute, attached to the CU die. For now, assume
18909 that the descriptive type info is not available. */
18913 /* Return the auxiliary type of the die in question using its
18914 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
18915 attribute is not present. */
18917 static struct type
*
18918 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18920 struct attribute
*type_attr
;
18922 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
18926 return lookup_die_type (die
, type_attr
, cu
);
18929 /* If DIE has a descriptive_type attribute, then set the TYPE's
18930 descriptive type accordingly. */
18933 set_descriptive_type (struct type
*type
, struct die_info
*die
,
18934 struct dwarf2_cu
*cu
)
18936 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
18938 if (descriptive_type
)
18940 ALLOCATE_GNAT_AUX_TYPE (type
);
18941 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
18945 /* Return the containing type of the die in question using its
18946 DW_AT_containing_type attribute. */
18948 static struct type
*
18949 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18951 struct attribute
*type_attr
;
18953 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
18955 error (_("Dwarf Error: Problem turning containing type into gdb type "
18956 "[in module %s]"), objfile_name (cu
->objfile
));
18958 return lookup_die_type (die
, type_attr
, cu
);
18961 /* Return an error marker type to use for the ill formed type in DIE/CU. */
18963 static struct type
*
18964 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
18966 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18967 char *message
, *saved
;
18969 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
18970 objfile_name (objfile
),
18971 cu
->header
.offset
.sect_off
,
18972 die
->offset
.sect_off
);
18973 saved
= (char *) obstack_copy0 (&objfile
->objfile_obstack
,
18974 message
, strlen (message
));
18977 return init_type (TYPE_CODE_ERROR
, 0, 0, saved
, objfile
);
18980 /* Look up the type of DIE in CU using its type attribute ATTR.
18981 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
18982 DW_AT_containing_type.
18983 If there is no type substitute an error marker. */
18985 static struct type
*
18986 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
18987 struct dwarf2_cu
*cu
)
18989 struct objfile
*objfile
= cu
->objfile
;
18990 struct type
*this_type
;
18992 gdb_assert (attr
->name
== DW_AT_type
18993 || attr
->name
== DW_AT_GNAT_descriptive_type
18994 || attr
->name
== DW_AT_containing_type
);
18996 /* First see if we have it cached. */
18998 if (attr
->form
== DW_FORM_GNU_ref_alt
)
19000 struct dwarf2_per_cu_data
*per_cu
;
19001 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
19003 per_cu
= dwarf2_find_containing_comp_unit (offset
, 1, cu
->objfile
);
19004 this_type
= get_die_type_at_offset (offset
, per_cu
);
19006 else if (attr_form_is_ref (attr
))
19008 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
19010 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
19012 else if (attr
->form
== DW_FORM_ref_sig8
)
19014 ULONGEST signature
= DW_SIGNATURE (attr
);
19016 return get_signatured_type (die
, signature
, cu
);
19020 complaint (&symfile_complaints
,
19021 _("Dwarf Error: Bad type attribute %s in DIE"
19022 " at 0x%x [in module %s]"),
19023 dwarf_attr_name (attr
->name
), die
->offset
.sect_off
,
19024 objfile_name (objfile
));
19025 return build_error_marker_type (cu
, die
);
19028 /* If not cached we need to read it in. */
19030 if (this_type
== NULL
)
19032 struct die_info
*type_die
= NULL
;
19033 struct dwarf2_cu
*type_cu
= cu
;
19035 if (attr_form_is_ref (attr
))
19036 type_die
= follow_die_ref (die
, attr
, &type_cu
);
19037 if (type_die
== NULL
)
19038 return build_error_marker_type (cu
, die
);
19039 /* If we find the type now, it's probably because the type came
19040 from an inter-CU reference and the type's CU got expanded before
19042 this_type
= read_type_die (type_die
, type_cu
);
19045 /* If we still don't have a type use an error marker. */
19047 if (this_type
== NULL
)
19048 return build_error_marker_type (cu
, die
);
19053 /* Return the type in DIE, CU.
19054 Returns NULL for invalid types.
19056 This first does a lookup in die_type_hash,
19057 and only reads the die in if necessary.
19059 NOTE: This can be called when reading in partial or full symbols. */
19061 static struct type
*
19062 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
19064 struct type
*this_type
;
19066 this_type
= get_die_type (die
, cu
);
19070 return read_type_die_1 (die
, cu
);
19073 /* Read the type in DIE, CU.
19074 Returns NULL for invalid types. */
19076 static struct type
*
19077 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
19079 struct type
*this_type
= NULL
;
19083 case DW_TAG_class_type
:
19084 case DW_TAG_interface_type
:
19085 case DW_TAG_structure_type
:
19086 case DW_TAG_union_type
:
19087 this_type
= read_structure_type (die
, cu
);
19089 case DW_TAG_enumeration_type
:
19090 this_type
= read_enumeration_type (die
, cu
);
19092 case DW_TAG_subprogram
:
19093 case DW_TAG_subroutine_type
:
19094 case DW_TAG_inlined_subroutine
:
19095 this_type
= read_subroutine_type (die
, cu
);
19097 case DW_TAG_array_type
:
19098 this_type
= read_array_type (die
, cu
);
19100 case DW_TAG_set_type
:
19101 this_type
= read_set_type (die
, cu
);
19103 case DW_TAG_pointer_type
:
19104 this_type
= read_tag_pointer_type (die
, cu
);
19106 case DW_TAG_ptr_to_member_type
:
19107 this_type
= read_tag_ptr_to_member_type (die
, cu
);
19109 case DW_TAG_reference_type
:
19110 this_type
= read_tag_reference_type (die
, cu
);
19112 case DW_TAG_const_type
:
19113 this_type
= read_tag_const_type (die
, cu
);
19115 case DW_TAG_volatile_type
:
19116 this_type
= read_tag_volatile_type (die
, cu
);
19118 case DW_TAG_restrict_type
:
19119 this_type
= read_tag_restrict_type (die
, cu
);
19121 case DW_TAG_string_type
:
19122 this_type
= read_tag_string_type (die
, cu
);
19124 case DW_TAG_typedef
:
19125 this_type
= read_typedef (die
, cu
);
19127 case DW_TAG_subrange_type
:
19128 this_type
= read_subrange_type (die
, cu
);
19130 case DW_TAG_base_type
:
19131 this_type
= read_base_type (die
, cu
);
19133 case DW_TAG_unspecified_type
:
19134 this_type
= read_unspecified_type (die
, cu
);
19136 case DW_TAG_namespace
:
19137 this_type
= read_namespace_type (die
, cu
);
19139 case DW_TAG_module
:
19140 this_type
= read_module_type (die
, cu
);
19142 case DW_TAG_atomic_type
:
19143 this_type
= read_tag_atomic_type (die
, cu
);
19146 complaint (&symfile_complaints
,
19147 _("unexpected tag in read_type_die: '%s'"),
19148 dwarf_tag_name (die
->tag
));
19155 /* See if we can figure out if the class lives in a namespace. We do
19156 this by looking for a member function; its demangled name will
19157 contain namespace info, if there is any.
19158 Return the computed name or NULL.
19159 Space for the result is allocated on the objfile's obstack.
19160 This is the full-die version of guess_partial_die_structure_name.
19161 In this case we know DIE has no useful parent. */
19164 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19166 struct die_info
*spec_die
;
19167 struct dwarf2_cu
*spec_cu
;
19168 struct die_info
*child
;
19171 spec_die
= die_specification (die
, &spec_cu
);
19172 if (spec_die
!= NULL
)
19178 for (child
= die
->child
;
19180 child
= child
->sibling
)
19182 if (child
->tag
== DW_TAG_subprogram
)
19184 const char *linkage_name
;
19186 linkage_name
= dwarf2_string_attr (child
, DW_AT_linkage_name
, cu
);
19187 if (linkage_name
== NULL
)
19188 linkage_name
= dwarf2_string_attr (child
, DW_AT_MIPS_linkage_name
,
19190 if (linkage_name
!= NULL
)
19193 = language_class_name_from_physname (cu
->language_defn
,
19197 if (actual_name
!= NULL
)
19199 const char *die_name
= dwarf2_name (die
, cu
);
19201 if (die_name
!= NULL
19202 && strcmp (die_name
, actual_name
) != 0)
19204 /* Strip off the class name from the full name.
19205 We want the prefix. */
19206 int die_name_len
= strlen (die_name
);
19207 int actual_name_len
= strlen (actual_name
);
19209 /* Test for '::' as a sanity check. */
19210 if (actual_name_len
> die_name_len
+ 2
19211 && actual_name
[actual_name_len
19212 - die_name_len
- 1] == ':')
19213 name
= (char *) obstack_copy0 (
19214 &cu
->objfile
->per_bfd
->storage_obstack
,
19215 actual_name
, actual_name_len
- die_name_len
- 2);
19218 xfree (actual_name
);
19227 /* GCC might emit a nameless typedef that has a linkage name. Determine the
19228 prefix part in such case. See
19229 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
19232 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
19234 struct attribute
*attr
;
19237 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
19238 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
19241 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
19244 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
19246 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
19247 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
19250 /* dwarf2_name had to be already called. */
19251 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
19253 /* Strip the base name, keep any leading namespaces/classes. */
19254 base
= strrchr (DW_STRING (attr
), ':');
19255 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
19258 return (char *) obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
19260 &base
[-1] - DW_STRING (attr
));
19263 /* Return the name of the namespace/class that DIE is defined within,
19264 or "" if we can't tell. The caller should not xfree the result.
19266 For example, if we're within the method foo() in the following
19276 then determine_prefix on foo's die will return "N::C". */
19278 static const char *
19279 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
19281 struct die_info
*parent
, *spec_die
;
19282 struct dwarf2_cu
*spec_cu
;
19283 struct type
*parent_type
;
19286 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
19287 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
19288 && cu
->language
!= language_rust
)
19291 retval
= anonymous_struct_prefix (die
, cu
);
19295 /* We have to be careful in the presence of DW_AT_specification.
19296 For example, with GCC 3.4, given the code
19300 // Definition of N::foo.
19304 then we'll have a tree of DIEs like this:
19306 1: DW_TAG_compile_unit
19307 2: DW_TAG_namespace // N
19308 3: DW_TAG_subprogram // declaration of N::foo
19309 4: DW_TAG_subprogram // definition of N::foo
19310 DW_AT_specification // refers to die #3
19312 Thus, when processing die #4, we have to pretend that we're in
19313 the context of its DW_AT_specification, namely the contex of die
19316 spec_die
= die_specification (die
, &spec_cu
);
19317 if (spec_die
== NULL
)
19318 parent
= die
->parent
;
19321 parent
= spec_die
->parent
;
19325 if (parent
== NULL
)
19327 else if (parent
->building_fullname
)
19330 const char *parent_name
;
19332 /* It has been seen on RealView 2.2 built binaries,
19333 DW_TAG_template_type_param types actually _defined_ as
19334 children of the parent class:
19337 template class <class Enum> Class{};
19338 Class<enum E> class_e;
19340 1: DW_TAG_class_type (Class)
19341 2: DW_TAG_enumeration_type (E)
19342 3: DW_TAG_enumerator (enum1:0)
19343 3: DW_TAG_enumerator (enum2:1)
19345 2: DW_TAG_template_type_param
19346 DW_AT_type DW_FORM_ref_udata (E)
19348 Besides being broken debug info, it can put GDB into an
19349 infinite loop. Consider:
19351 When we're building the full name for Class<E>, we'll start
19352 at Class, and go look over its template type parameters,
19353 finding E. We'll then try to build the full name of E, and
19354 reach here. We're now trying to build the full name of E,
19355 and look over the parent DIE for containing scope. In the
19356 broken case, if we followed the parent DIE of E, we'd again
19357 find Class, and once again go look at its template type
19358 arguments, etc., etc. Simply don't consider such parent die
19359 as source-level parent of this die (it can't be, the language
19360 doesn't allow it), and break the loop here. */
19361 name
= dwarf2_name (die
, cu
);
19362 parent_name
= dwarf2_name (parent
, cu
);
19363 complaint (&symfile_complaints
,
19364 _("template param type '%s' defined within parent '%s'"),
19365 name
? name
: "<unknown>",
19366 parent_name
? parent_name
: "<unknown>");
19370 switch (parent
->tag
)
19372 case DW_TAG_namespace
:
19373 parent_type
= read_type_die (parent
, cu
);
19374 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
19375 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
19376 Work around this problem here. */
19377 if (cu
->language
== language_cplus
19378 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
19380 /* We give a name to even anonymous namespaces. */
19381 return TYPE_TAG_NAME (parent_type
);
19382 case DW_TAG_class_type
:
19383 case DW_TAG_interface_type
:
19384 case DW_TAG_structure_type
:
19385 case DW_TAG_union_type
:
19386 case DW_TAG_module
:
19387 parent_type
= read_type_die (parent
, cu
);
19388 if (TYPE_TAG_NAME (parent_type
) != NULL
)
19389 return TYPE_TAG_NAME (parent_type
);
19391 /* An anonymous structure is only allowed non-static data
19392 members; no typedefs, no member functions, et cetera.
19393 So it does not need a prefix. */
19395 case DW_TAG_compile_unit
:
19396 case DW_TAG_partial_unit
:
19397 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
19398 if (cu
->language
== language_cplus
19399 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
19400 && die
->child
!= NULL
19401 && (die
->tag
== DW_TAG_class_type
19402 || die
->tag
== DW_TAG_structure_type
19403 || die
->tag
== DW_TAG_union_type
))
19405 char *name
= guess_full_die_structure_name (die
, cu
);
19410 case DW_TAG_enumeration_type
:
19411 parent_type
= read_type_die (parent
, cu
);
19412 if (TYPE_DECLARED_CLASS (parent_type
))
19414 if (TYPE_TAG_NAME (parent_type
) != NULL
)
19415 return TYPE_TAG_NAME (parent_type
);
19418 /* Fall through. */
19420 return determine_prefix (parent
, cu
);
19424 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
19425 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
19426 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
19427 an obconcat, otherwise allocate storage for the result. The CU argument is
19428 used to determine the language and hence, the appropriate separator. */
19430 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
19433 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
19434 int physname
, struct dwarf2_cu
*cu
)
19436 const char *lead
= "";
19439 if (suffix
== NULL
|| suffix
[0] == '\0'
19440 || prefix
== NULL
|| prefix
[0] == '\0')
19442 else if (cu
->language
== language_java
)
19444 else if (cu
->language
== language_d
)
19446 /* For D, the 'main' function could be defined in any module, but it
19447 should never be prefixed. */
19448 if (strcmp (suffix
, "D main") == 0)
19456 else if (cu
->language
== language_fortran
&& physname
)
19458 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
19459 DW_AT_MIPS_linkage_name is preferred and used instead. */
19467 if (prefix
== NULL
)
19469 if (suffix
== NULL
)
19476 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
19478 strcpy (retval
, lead
);
19479 strcat (retval
, prefix
);
19480 strcat (retval
, sep
);
19481 strcat (retval
, suffix
);
19486 /* We have an obstack. */
19487 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
19491 /* Return sibling of die, NULL if no sibling. */
19493 static struct die_info
*
19494 sibling_die (struct die_info
*die
)
19496 return die
->sibling
;
19499 /* Get name of a die, return NULL if not found. */
19501 static const char *
19502 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
19503 struct obstack
*obstack
)
19505 if (name
&& cu
->language
== language_cplus
)
19507 char *canon_name
= cp_canonicalize_string (name
);
19509 if (canon_name
!= NULL
)
19511 if (strcmp (canon_name
, name
) != 0)
19512 name
= (const char *) obstack_copy0 (obstack
, canon_name
,
19513 strlen (canon_name
));
19514 xfree (canon_name
);
19521 /* Get name of a die, return NULL if not found.
19522 Anonymous namespaces are converted to their magic string. */
19524 static const char *
19525 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19527 struct attribute
*attr
;
19529 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
19530 if ((!attr
|| !DW_STRING (attr
))
19531 && die
->tag
!= DW_TAG_namespace
19532 && die
->tag
!= DW_TAG_class_type
19533 && die
->tag
!= DW_TAG_interface_type
19534 && die
->tag
!= DW_TAG_structure_type
19535 && die
->tag
!= DW_TAG_union_type
)
19540 case DW_TAG_compile_unit
:
19541 case DW_TAG_partial_unit
:
19542 /* Compilation units have a DW_AT_name that is a filename, not
19543 a source language identifier. */
19544 case DW_TAG_enumeration_type
:
19545 case DW_TAG_enumerator
:
19546 /* These tags always have simple identifiers already; no need
19547 to canonicalize them. */
19548 return DW_STRING (attr
);
19550 case DW_TAG_namespace
:
19551 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
19552 return DW_STRING (attr
);
19553 return CP_ANONYMOUS_NAMESPACE_STR
;
19555 case DW_TAG_subprogram
:
19556 /* Java constructors will all be named "<init>", so return
19557 the class name when we see this special case. */
19558 if (cu
->language
== language_java
19559 && DW_STRING (attr
) != NULL
19560 && strcmp (DW_STRING (attr
), "<init>") == 0)
19562 struct dwarf2_cu
*spec_cu
= cu
;
19563 struct die_info
*spec_die
;
19565 /* GCJ will output '<init>' for Java constructor names.
19566 For this special case, return the name of the parent class. */
19568 /* GCJ may output subprogram DIEs with AT_specification set.
19569 If so, use the name of the specified DIE. */
19570 spec_die
= die_specification (die
, &spec_cu
);
19571 if (spec_die
!= NULL
)
19572 return dwarf2_name (spec_die
, spec_cu
);
19577 if (die
->tag
== DW_TAG_class_type
)
19578 return dwarf2_name (die
, cu
);
19580 while (die
->tag
!= DW_TAG_compile_unit
19581 && die
->tag
!= DW_TAG_partial_unit
);
19585 case DW_TAG_class_type
:
19586 case DW_TAG_interface_type
:
19587 case DW_TAG_structure_type
:
19588 case DW_TAG_union_type
:
19589 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
19590 structures or unions. These were of the form "._%d" in GCC 4.1,
19591 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
19592 and GCC 4.4. We work around this problem by ignoring these. */
19593 if (attr
&& DW_STRING (attr
)
19594 && (startswith (DW_STRING (attr
), "._")
19595 || startswith (DW_STRING (attr
), "<anonymous")))
19598 /* GCC might emit a nameless typedef that has a linkage name. See
19599 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
19600 if (!attr
|| DW_STRING (attr
) == NULL
)
19602 char *demangled
= NULL
;
19604 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
19606 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
19608 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
19611 /* Avoid demangling DW_STRING (attr) the second time on a second
19612 call for the same DIE. */
19613 if (!DW_STRING_IS_CANONICAL (attr
))
19614 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
19620 /* FIXME: we already did this for the partial symbol... */
19623 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
19624 demangled
, strlen (demangled
)));
19625 DW_STRING_IS_CANONICAL (attr
) = 1;
19628 /* Strip any leading namespaces/classes, keep only the base name.
19629 DW_AT_name for named DIEs does not contain the prefixes. */
19630 base
= strrchr (DW_STRING (attr
), ':');
19631 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
19634 return DW_STRING (attr
);
19643 if (!DW_STRING_IS_CANONICAL (attr
))
19646 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
19647 &cu
->objfile
->per_bfd
->storage_obstack
);
19648 DW_STRING_IS_CANONICAL (attr
) = 1;
19650 return DW_STRING (attr
);
19653 /* Return the die that this die in an extension of, or NULL if there
19654 is none. *EXT_CU is the CU containing DIE on input, and the CU
19655 containing the return value on output. */
19657 static struct die_info
*
19658 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
19660 struct attribute
*attr
;
19662 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
19666 return follow_die_ref (die
, attr
, ext_cu
);
19669 /* Convert a DIE tag into its string name. */
19671 static const char *
19672 dwarf_tag_name (unsigned tag
)
19674 const char *name
= get_DW_TAG_name (tag
);
19677 return "DW_TAG_<unknown>";
19682 /* Convert a DWARF attribute code into its string name. */
19684 static const char *
19685 dwarf_attr_name (unsigned attr
)
19689 #ifdef MIPS /* collides with DW_AT_HP_block_index */
19690 if (attr
== DW_AT_MIPS_fde
)
19691 return "DW_AT_MIPS_fde";
19693 if (attr
== DW_AT_HP_block_index
)
19694 return "DW_AT_HP_block_index";
19697 name
= get_DW_AT_name (attr
);
19700 return "DW_AT_<unknown>";
19705 /* Convert a DWARF value form code into its string name. */
19707 static const char *
19708 dwarf_form_name (unsigned form
)
19710 const char *name
= get_DW_FORM_name (form
);
19713 return "DW_FORM_<unknown>";
19719 dwarf_bool_name (unsigned mybool
)
19727 /* Convert a DWARF type code into its string name. */
19729 static const char *
19730 dwarf_type_encoding_name (unsigned enc
)
19732 const char *name
= get_DW_ATE_name (enc
);
19735 return "DW_ATE_<unknown>";
19741 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
19745 print_spaces (indent
, f
);
19746 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
19747 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
.sect_off
);
19749 if (die
->parent
!= NULL
)
19751 print_spaces (indent
, f
);
19752 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
19753 die
->parent
->offset
.sect_off
);
19756 print_spaces (indent
, f
);
19757 fprintf_unfiltered (f
, " has children: %s\n",
19758 dwarf_bool_name (die
->child
!= NULL
));
19760 print_spaces (indent
, f
);
19761 fprintf_unfiltered (f
, " attributes:\n");
19763 for (i
= 0; i
< die
->num_attrs
; ++i
)
19765 print_spaces (indent
, f
);
19766 fprintf_unfiltered (f
, " %s (%s) ",
19767 dwarf_attr_name (die
->attrs
[i
].name
),
19768 dwarf_form_name (die
->attrs
[i
].form
));
19770 switch (die
->attrs
[i
].form
)
19773 case DW_FORM_GNU_addr_index
:
19774 fprintf_unfiltered (f
, "address: ");
19775 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
19777 case DW_FORM_block2
:
19778 case DW_FORM_block4
:
19779 case DW_FORM_block
:
19780 case DW_FORM_block1
:
19781 fprintf_unfiltered (f
, "block: size %s",
19782 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
19784 case DW_FORM_exprloc
:
19785 fprintf_unfiltered (f
, "expression: size %s",
19786 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
19788 case DW_FORM_ref_addr
:
19789 fprintf_unfiltered (f
, "ref address: ");
19790 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
19792 case DW_FORM_GNU_ref_alt
:
19793 fprintf_unfiltered (f
, "alt ref address: ");
19794 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
19800 case DW_FORM_ref_udata
:
19801 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
19802 (long) (DW_UNSND (&die
->attrs
[i
])));
19804 case DW_FORM_data1
:
19805 case DW_FORM_data2
:
19806 case DW_FORM_data4
:
19807 case DW_FORM_data8
:
19808 case DW_FORM_udata
:
19809 case DW_FORM_sdata
:
19810 fprintf_unfiltered (f
, "constant: %s",
19811 pulongest (DW_UNSND (&die
->attrs
[i
])));
19813 case DW_FORM_sec_offset
:
19814 fprintf_unfiltered (f
, "section offset: %s",
19815 pulongest (DW_UNSND (&die
->attrs
[i
])));
19817 case DW_FORM_ref_sig8
:
19818 fprintf_unfiltered (f
, "signature: %s",
19819 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
19821 case DW_FORM_string
:
19823 case DW_FORM_GNU_str_index
:
19824 case DW_FORM_GNU_strp_alt
:
19825 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
19826 DW_STRING (&die
->attrs
[i
])
19827 ? DW_STRING (&die
->attrs
[i
]) : "",
19828 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
19831 if (DW_UNSND (&die
->attrs
[i
]))
19832 fprintf_unfiltered (f
, "flag: TRUE");
19834 fprintf_unfiltered (f
, "flag: FALSE");
19836 case DW_FORM_flag_present
:
19837 fprintf_unfiltered (f
, "flag: TRUE");
19839 case DW_FORM_indirect
:
19840 /* The reader will have reduced the indirect form to
19841 the "base form" so this form should not occur. */
19842 fprintf_unfiltered (f
,
19843 "unexpected attribute form: DW_FORM_indirect");
19846 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
19847 die
->attrs
[i
].form
);
19850 fprintf_unfiltered (f
, "\n");
19855 dump_die_for_error (struct die_info
*die
)
19857 dump_die_shallow (gdb_stderr
, 0, die
);
19861 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
19863 int indent
= level
* 4;
19865 gdb_assert (die
!= NULL
);
19867 if (level
>= max_level
)
19870 dump_die_shallow (f
, indent
, die
);
19872 if (die
->child
!= NULL
)
19874 print_spaces (indent
, f
);
19875 fprintf_unfiltered (f
, " Children:");
19876 if (level
+ 1 < max_level
)
19878 fprintf_unfiltered (f
, "\n");
19879 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
19883 fprintf_unfiltered (f
,
19884 " [not printed, max nesting level reached]\n");
19888 if (die
->sibling
!= NULL
&& level
> 0)
19890 dump_die_1 (f
, level
, max_level
, die
->sibling
);
19894 /* This is called from the pdie macro in gdbinit.in.
19895 It's not static so gcc will keep a copy callable from gdb. */
19898 dump_die (struct die_info
*die
, int max_level
)
19900 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
19904 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
19908 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
.sect_off
,
19914 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
19918 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
19920 sect_offset retval
= { DW_UNSND (attr
) };
19922 if (attr_form_is_ref (attr
))
19925 retval
.sect_off
= 0;
19926 complaint (&symfile_complaints
,
19927 _("unsupported die ref attribute form: '%s'"),
19928 dwarf_form_name (attr
->form
));
19932 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
19933 * the value held by the attribute is not constant. */
19936 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
19938 if (attr
->form
== DW_FORM_sdata
)
19939 return DW_SND (attr
);
19940 else if (attr
->form
== DW_FORM_udata
19941 || attr
->form
== DW_FORM_data1
19942 || attr
->form
== DW_FORM_data2
19943 || attr
->form
== DW_FORM_data4
19944 || attr
->form
== DW_FORM_data8
)
19945 return DW_UNSND (attr
);
19948 complaint (&symfile_complaints
,
19949 _("Attribute value is not a constant (%s)"),
19950 dwarf_form_name (attr
->form
));
19951 return default_value
;
19955 /* Follow reference or signature attribute ATTR of SRC_DIE.
19956 On entry *REF_CU is the CU of SRC_DIE.
19957 On exit *REF_CU is the CU of the result. */
19959 static struct die_info
*
19960 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
19961 struct dwarf2_cu
**ref_cu
)
19963 struct die_info
*die
;
19965 if (attr_form_is_ref (attr
))
19966 die
= follow_die_ref (src_die
, attr
, ref_cu
);
19967 else if (attr
->form
== DW_FORM_ref_sig8
)
19968 die
= follow_die_sig (src_die
, attr
, ref_cu
);
19971 dump_die_for_error (src_die
);
19972 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
19973 objfile_name ((*ref_cu
)->objfile
));
19979 /* Follow reference OFFSET.
19980 On entry *REF_CU is the CU of the source die referencing OFFSET.
19981 On exit *REF_CU is the CU of the result.
19982 Returns NULL if OFFSET is invalid. */
19984 static struct die_info
*
19985 follow_die_offset (sect_offset offset
, int offset_in_dwz
,
19986 struct dwarf2_cu
**ref_cu
)
19988 struct die_info temp_die
;
19989 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
19991 gdb_assert (cu
->per_cu
!= NULL
);
19995 if (cu
->per_cu
->is_debug_types
)
19997 /* .debug_types CUs cannot reference anything outside their CU.
19998 If they need to, they have to reference a signatured type via
19999 DW_FORM_ref_sig8. */
20000 if (! offset_in_cu_p (&cu
->header
, offset
))
20003 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
20004 || ! offset_in_cu_p (&cu
->header
, offset
))
20006 struct dwarf2_per_cu_data
*per_cu
;
20008 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
20011 /* If necessary, add it to the queue and load its DIEs. */
20012 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
20013 load_full_comp_unit (per_cu
, cu
->language
);
20015 target_cu
= per_cu
->cu
;
20017 else if (cu
->dies
== NULL
)
20019 /* We're loading full DIEs during partial symbol reading. */
20020 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
20021 load_full_comp_unit (cu
->per_cu
, language_minimal
);
20024 *ref_cu
= target_cu
;
20025 temp_die
.offset
= offset
;
20026 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
20027 &temp_die
, offset
.sect_off
);
20030 /* Follow reference attribute ATTR of SRC_DIE.
20031 On entry *REF_CU is the CU of SRC_DIE.
20032 On exit *REF_CU is the CU of the result. */
20034 static struct die_info
*
20035 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
20036 struct dwarf2_cu
**ref_cu
)
20038 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
20039 struct dwarf2_cu
*cu
= *ref_cu
;
20040 struct die_info
*die
;
20042 die
= follow_die_offset (offset
,
20043 (attr
->form
== DW_FORM_GNU_ref_alt
20044 || cu
->per_cu
->is_dwz
),
20047 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
20048 "at 0x%x [in module %s]"),
20049 offset
.sect_off
, src_die
->offset
.sect_off
,
20050 objfile_name (cu
->objfile
));
20055 /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU.
20056 Returned value is intended for DW_OP_call*. Returned
20057 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
20059 struct dwarf2_locexpr_baton
20060 dwarf2_fetch_die_loc_sect_off (sect_offset offset
,
20061 struct dwarf2_per_cu_data
*per_cu
,
20062 CORE_ADDR (*get_frame_pc
) (void *baton
),
20065 struct dwarf2_cu
*cu
;
20066 struct die_info
*die
;
20067 struct attribute
*attr
;
20068 struct dwarf2_locexpr_baton retval
;
20070 dw2_setup (per_cu
->objfile
);
20072 if (per_cu
->cu
== NULL
)
20077 /* We shouldn't get here for a dummy CU, but don't crash on the user.
20078 Instead just throw an error, not much else we can do. */
20079 error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"),
20080 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20083 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
20085 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
20086 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20088 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
20091 /* DWARF: "If there is no such attribute, then there is no effect.".
20092 DATA is ignored if SIZE is 0. */
20094 retval
.data
= NULL
;
20097 else if (attr_form_is_section_offset (attr
))
20099 struct dwarf2_loclist_baton loclist_baton
;
20100 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
20103 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
20105 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
20107 retval
.size
= size
;
20111 if (!attr_form_is_block (attr
))
20112 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
20113 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
20114 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20116 retval
.data
= DW_BLOCK (attr
)->data
;
20117 retval
.size
= DW_BLOCK (attr
)->size
;
20119 retval
.per_cu
= cu
->per_cu
;
20121 age_cached_comp_units ();
20126 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
20129 struct dwarf2_locexpr_baton
20130 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
20131 struct dwarf2_per_cu_data
*per_cu
,
20132 CORE_ADDR (*get_frame_pc
) (void *baton
),
20135 sect_offset offset
= { per_cu
->offset
.sect_off
+ offset_in_cu
.cu_off
};
20137 return dwarf2_fetch_die_loc_sect_off (offset
, per_cu
, get_frame_pc
, baton
);
20140 /* Write a constant of a given type as target-ordered bytes into
20143 static const gdb_byte
*
20144 write_constant_as_bytes (struct obstack
*obstack
,
20145 enum bfd_endian byte_order
,
20152 *len
= TYPE_LENGTH (type
);
20153 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
20154 store_unsigned_integer (result
, *len
, byte_order
, value
);
20159 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
20160 pointer to the constant bytes and set LEN to the length of the
20161 data. If memory is needed, allocate it on OBSTACK. If the DIE
20162 does not have a DW_AT_const_value, return NULL. */
20165 dwarf2_fetch_constant_bytes (sect_offset offset
,
20166 struct dwarf2_per_cu_data
*per_cu
,
20167 struct obstack
*obstack
,
20170 struct dwarf2_cu
*cu
;
20171 struct die_info
*die
;
20172 struct attribute
*attr
;
20173 const gdb_byte
*result
= NULL
;
20176 enum bfd_endian byte_order
;
20178 dw2_setup (per_cu
->objfile
);
20180 if (per_cu
->cu
== NULL
)
20185 /* We shouldn't get here for a dummy CU, but don't crash on the user.
20186 Instead just throw an error, not much else we can do. */
20187 error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"),
20188 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20191 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
20193 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
20194 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20197 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20201 byte_order
= (bfd_big_endian (per_cu
->objfile
->obfd
)
20202 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
20204 switch (attr
->form
)
20207 case DW_FORM_GNU_addr_index
:
20211 *len
= cu
->header
.addr_size
;
20212 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
20213 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
20217 case DW_FORM_string
:
20219 case DW_FORM_GNU_str_index
:
20220 case DW_FORM_GNU_strp_alt
:
20221 /* DW_STRING is already allocated on the objfile obstack, point
20223 result
= (const gdb_byte
*) DW_STRING (attr
);
20224 *len
= strlen (DW_STRING (attr
));
20226 case DW_FORM_block1
:
20227 case DW_FORM_block2
:
20228 case DW_FORM_block4
:
20229 case DW_FORM_block
:
20230 case DW_FORM_exprloc
:
20231 result
= DW_BLOCK (attr
)->data
;
20232 *len
= DW_BLOCK (attr
)->size
;
20235 /* The DW_AT_const_value attributes are supposed to carry the
20236 symbol's value "represented as it would be on the target
20237 architecture." By the time we get here, it's already been
20238 converted to host endianness, so we just need to sign- or
20239 zero-extend it as appropriate. */
20240 case DW_FORM_data1
:
20241 type
= die_type (die
, cu
);
20242 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
20243 if (result
== NULL
)
20244 result
= write_constant_as_bytes (obstack
, byte_order
,
20247 case DW_FORM_data2
:
20248 type
= die_type (die
, cu
);
20249 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
20250 if (result
== NULL
)
20251 result
= write_constant_as_bytes (obstack
, byte_order
,
20254 case DW_FORM_data4
:
20255 type
= die_type (die
, cu
);
20256 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
20257 if (result
== NULL
)
20258 result
= write_constant_as_bytes (obstack
, byte_order
,
20261 case DW_FORM_data8
:
20262 type
= die_type (die
, cu
);
20263 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
20264 if (result
== NULL
)
20265 result
= write_constant_as_bytes (obstack
, byte_order
,
20269 case DW_FORM_sdata
:
20270 type
= die_type (die
, cu
);
20271 result
= write_constant_as_bytes (obstack
, byte_order
,
20272 type
, DW_SND (attr
), len
);
20275 case DW_FORM_udata
:
20276 type
= die_type (die
, cu
);
20277 result
= write_constant_as_bytes (obstack
, byte_order
,
20278 type
, DW_UNSND (attr
), len
);
20282 complaint (&symfile_complaints
,
20283 _("unsupported const value attribute form: '%s'"),
20284 dwarf_form_name (attr
->form
));
20291 /* Return the type of the DIE at DIE_OFFSET in the CU named by
20295 dwarf2_get_die_type (cu_offset die_offset
,
20296 struct dwarf2_per_cu_data
*per_cu
)
20298 sect_offset die_offset_sect
;
20300 dw2_setup (per_cu
->objfile
);
20302 die_offset_sect
.sect_off
= per_cu
->offset
.sect_off
+ die_offset
.cu_off
;
20303 return get_die_type_at_offset (die_offset_sect
, per_cu
);
20306 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
20307 On entry *REF_CU is the CU of SRC_DIE.
20308 On exit *REF_CU is the CU of the result.
20309 Returns NULL if the referenced DIE isn't found. */
20311 static struct die_info
*
20312 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
20313 struct dwarf2_cu
**ref_cu
)
20315 struct die_info temp_die
;
20316 struct dwarf2_cu
*sig_cu
;
20317 struct die_info
*die
;
20319 /* While it might be nice to assert sig_type->type == NULL here,
20320 we can get here for DW_AT_imported_declaration where we need
20321 the DIE not the type. */
20323 /* If necessary, add it to the queue and load its DIEs. */
20325 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
20326 read_signatured_type (sig_type
);
20328 sig_cu
= sig_type
->per_cu
.cu
;
20329 gdb_assert (sig_cu
!= NULL
);
20330 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
20331 temp_die
.offset
= sig_type
->type_offset_in_section
;
20332 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
20333 temp_die
.offset
.sect_off
);
20336 /* For .gdb_index version 7 keep track of included TUs.
20337 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
20338 if (dwarf2_per_objfile
->index_table
!= NULL
20339 && dwarf2_per_objfile
->index_table
->version
<= 7)
20341 VEC_safe_push (dwarf2_per_cu_ptr
,
20342 (*ref_cu
)->per_cu
->imported_symtabs
,
20353 /* Follow signatured type referenced by ATTR in SRC_DIE.
20354 On entry *REF_CU is the CU of SRC_DIE.
20355 On exit *REF_CU is the CU of the result.
20356 The result is the DIE of the type.
20357 If the referenced type cannot be found an error is thrown. */
20359 static struct die_info
*
20360 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
20361 struct dwarf2_cu
**ref_cu
)
20363 ULONGEST signature
= DW_SIGNATURE (attr
);
20364 struct signatured_type
*sig_type
;
20365 struct die_info
*die
;
20367 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
20369 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
20370 /* sig_type will be NULL if the signatured type is missing from
20372 if (sig_type
== NULL
)
20374 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
20375 " from DIE at 0x%x [in module %s]"),
20376 hex_string (signature
), src_die
->offset
.sect_off
,
20377 objfile_name ((*ref_cu
)->objfile
));
20380 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
20383 dump_die_for_error (src_die
);
20384 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
20385 " from DIE at 0x%x [in module %s]"),
20386 hex_string (signature
), src_die
->offset
.sect_off
,
20387 objfile_name ((*ref_cu
)->objfile
));
20393 /* Get the type specified by SIGNATURE referenced in DIE/CU,
20394 reading in and processing the type unit if necessary. */
20396 static struct type
*
20397 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
20398 struct dwarf2_cu
*cu
)
20400 struct signatured_type
*sig_type
;
20401 struct dwarf2_cu
*type_cu
;
20402 struct die_info
*type_die
;
20405 sig_type
= lookup_signatured_type (cu
, signature
);
20406 /* sig_type will be NULL if the signatured type is missing from
20408 if (sig_type
== NULL
)
20410 complaint (&symfile_complaints
,
20411 _("Dwarf Error: Cannot find signatured DIE %s referenced"
20412 " from DIE at 0x%x [in module %s]"),
20413 hex_string (signature
), die
->offset
.sect_off
,
20414 objfile_name (dwarf2_per_objfile
->objfile
));
20415 return build_error_marker_type (cu
, die
);
20418 /* If we already know the type we're done. */
20419 if (sig_type
->type
!= NULL
)
20420 return sig_type
->type
;
20423 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
20424 if (type_die
!= NULL
)
20426 /* N.B. We need to call get_die_type to ensure only one type for this DIE
20427 is created. This is important, for example, because for c++ classes
20428 we need TYPE_NAME set which is only done by new_symbol. Blech. */
20429 type
= read_type_die (type_die
, type_cu
);
20432 complaint (&symfile_complaints
,
20433 _("Dwarf Error: Cannot build signatured type %s"
20434 " referenced from DIE at 0x%x [in module %s]"),
20435 hex_string (signature
), die
->offset
.sect_off
,
20436 objfile_name (dwarf2_per_objfile
->objfile
));
20437 type
= build_error_marker_type (cu
, die
);
20442 complaint (&symfile_complaints
,
20443 _("Dwarf Error: Problem reading signatured DIE %s referenced"
20444 " from DIE at 0x%x [in module %s]"),
20445 hex_string (signature
), die
->offset
.sect_off
,
20446 objfile_name (dwarf2_per_objfile
->objfile
));
20447 type
= build_error_marker_type (cu
, die
);
20449 sig_type
->type
= type
;
20454 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
20455 reading in and processing the type unit if necessary. */
20457 static struct type
*
20458 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
20459 struct dwarf2_cu
*cu
) /* ARI: editCase function */
20461 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
20462 if (attr_form_is_ref (attr
))
20464 struct dwarf2_cu
*type_cu
= cu
;
20465 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
20467 return read_type_die (type_die
, type_cu
);
20469 else if (attr
->form
== DW_FORM_ref_sig8
)
20471 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
20475 complaint (&symfile_complaints
,
20476 _("Dwarf Error: DW_AT_signature has bad form %s in DIE"
20477 " at 0x%x [in module %s]"),
20478 dwarf_form_name (attr
->form
), die
->offset
.sect_off
,
20479 objfile_name (dwarf2_per_objfile
->objfile
));
20480 return build_error_marker_type (cu
, die
);
20484 /* Load the DIEs associated with type unit PER_CU into memory. */
20487 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
20489 struct signatured_type
*sig_type
;
20491 /* Caller is responsible for ensuring type_unit_groups don't get here. */
20492 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
20494 /* We have the per_cu, but we need the signatured_type.
20495 Fortunately this is an easy translation. */
20496 gdb_assert (per_cu
->is_debug_types
);
20497 sig_type
= (struct signatured_type
*) per_cu
;
20499 gdb_assert (per_cu
->cu
== NULL
);
20501 read_signatured_type (sig_type
);
20503 gdb_assert (per_cu
->cu
!= NULL
);
20506 /* die_reader_func for read_signatured_type.
20507 This is identical to load_full_comp_unit_reader,
20508 but is kept separate for now. */
20511 read_signatured_type_reader (const struct die_reader_specs
*reader
,
20512 const gdb_byte
*info_ptr
,
20513 struct die_info
*comp_unit_die
,
20517 struct dwarf2_cu
*cu
= reader
->cu
;
20519 gdb_assert (cu
->die_hash
== NULL
);
20521 htab_create_alloc_ex (cu
->header
.length
/ 12,
20525 &cu
->comp_unit_obstack
,
20526 hashtab_obstack_allocate
,
20527 dummy_obstack_deallocate
);
20530 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
20531 &info_ptr
, comp_unit_die
);
20532 cu
->dies
= comp_unit_die
;
20533 /* comp_unit_die is not stored in die_hash, no need. */
20535 /* We try not to read any attributes in this function, because not
20536 all CUs needed for references have been loaded yet, and symbol
20537 table processing isn't initialized. But we have to set the CU language,
20538 or we won't be able to build types correctly.
20539 Similarly, if we do not read the producer, we can not apply
20540 producer-specific interpretation. */
20541 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
20544 /* Read in a signatured type and build its CU and DIEs.
20545 If the type is a stub for the real type in a DWO file,
20546 read in the real type from the DWO file as well. */
20549 read_signatured_type (struct signatured_type
*sig_type
)
20551 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
20553 gdb_assert (per_cu
->is_debug_types
);
20554 gdb_assert (per_cu
->cu
== NULL
);
20556 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
20557 read_signatured_type_reader
, NULL
);
20558 sig_type
->per_cu
.tu_read
= 1;
20561 /* Decode simple location descriptions.
20562 Given a pointer to a dwarf block that defines a location, compute
20563 the location and return the value.
20565 NOTE drow/2003-11-18: This function is called in two situations
20566 now: for the address of static or global variables (partial symbols
20567 only) and for offsets into structures which are expected to be
20568 (more or less) constant. The partial symbol case should go away,
20569 and only the constant case should remain. That will let this
20570 function complain more accurately. A few special modes are allowed
20571 without complaint for global variables (for instance, global
20572 register values and thread-local values).
20574 A location description containing no operations indicates that the
20575 object is optimized out. The return value is 0 for that case.
20576 FIXME drow/2003-11-16: No callers check for this case any more; soon all
20577 callers will only want a very basic result and this can become a
20580 Note that stack[0] is unused except as a default error return. */
20583 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
20585 struct objfile
*objfile
= cu
->objfile
;
20587 size_t size
= blk
->size
;
20588 const gdb_byte
*data
= blk
->data
;
20589 CORE_ADDR stack
[64];
20591 unsigned int bytes_read
, unsnd
;
20597 stack
[++stacki
] = 0;
20636 stack
[++stacki
] = op
- DW_OP_lit0
;
20671 stack
[++stacki
] = op
- DW_OP_reg0
;
20673 dwarf2_complex_location_expr_complaint ();
20677 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
20679 stack
[++stacki
] = unsnd
;
20681 dwarf2_complex_location_expr_complaint ();
20685 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
20690 case DW_OP_const1u
:
20691 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
20695 case DW_OP_const1s
:
20696 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
20700 case DW_OP_const2u
:
20701 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
20705 case DW_OP_const2s
:
20706 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
20710 case DW_OP_const4u
:
20711 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
20715 case DW_OP_const4s
:
20716 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
20720 case DW_OP_const8u
:
20721 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
20726 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
20732 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
20737 stack
[stacki
+ 1] = stack
[stacki
];
20742 stack
[stacki
- 1] += stack
[stacki
];
20746 case DW_OP_plus_uconst
:
20747 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
20753 stack
[stacki
- 1] -= stack
[stacki
];
20758 /* If we're not the last op, then we definitely can't encode
20759 this using GDB's address_class enum. This is valid for partial
20760 global symbols, although the variable's address will be bogus
20763 dwarf2_complex_location_expr_complaint ();
20766 case DW_OP_GNU_push_tls_address
:
20767 /* The top of the stack has the offset from the beginning
20768 of the thread control block at which the variable is located. */
20769 /* Nothing should follow this operator, so the top of stack would
20771 /* This is valid for partial global symbols, but the variable's
20772 address will be bogus in the psymtab. Make it always at least
20773 non-zero to not look as a variable garbage collected by linker
20774 which have DW_OP_addr 0. */
20776 dwarf2_complex_location_expr_complaint ();
20780 case DW_OP_GNU_uninit
:
20783 case DW_OP_GNU_addr_index
:
20784 case DW_OP_GNU_const_index
:
20785 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
20792 const char *name
= get_DW_OP_name (op
);
20795 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
20798 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
20802 return (stack
[stacki
]);
20805 /* Enforce maximum stack depth of SIZE-1 to avoid writing
20806 outside of the allocated space. Also enforce minimum>0. */
20807 if (stacki
>= ARRAY_SIZE (stack
) - 1)
20809 complaint (&symfile_complaints
,
20810 _("location description stack overflow"));
20816 complaint (&symfile_complaints
,
20817 _("location description stack underflow"));
20821 return (stack
[stacki
]);
20824 /* memory allocation interface */
20826 static struct dwarf_block
*
20827 dwarf_alloc_block (struct dwarf2_cu
*cu
)
20829 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
20832 static struct die_info
*
20833 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
20835 struct die_info
*die
;
20836 size_t size
= sizeof (struct die_info
);
20839 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
20841 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
20842 memset (die
, 0, sizeof (struct die_info
));
20847 /* Macro support. */
20849 /* Return file name relative to the compilation directory of file number I in
20850 *LH's file name table. The result is allocated using xmalloc; the caller is
20851 responsible for freeing it. */
20854 file_file_name (int file
, struct line_header
*lh
)
20856 /* Is the file number a valid index into the line header's file name
20857 table? Remember that file numbers start with one, not zero. */
20858 if (1 <= file
&& file
<= lh
->num_file_names
)
20860 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
20862 if (IS_ABSOLUTE_PATH (fe
->name
) || fe
->dir_index
== 0
20863 || lh
->include_dirs
== NULL
)
20864 return xstrdup (fe
->name
);
20865 return concat (lh
->include_dirs
[fe
->dir_index
- 1], SLASH_STRING
,
20866 fe
->name
, (char *) NULL
);
20870 /* The compiler produced a bogus file number. We can at least
20871 record the macro definitions made in the file, even if we
20872 won't be able to find the file by name. */
20873 char fake_name
[80];
20875 xsnprintf (fake_name
, sizeof (fake_name
),
20876 "<bad macro file number %d>", file
);
20878 complaint (&symfile_complaints
,
20879 _("bad file number in macro information (%d)"),
20882 return xstrdup (fake_name
);
20886 /* Return the full name of file number I in *LH's file name table.
20887 Use COMP_DIR as the name of the current directory of the
20888 compilation. The result is allocated using xmalloc; the caller is
20889 responsible for freeing it. */
20891 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
20893 /* Is the file number a valid index into the line header's file name
20894 table? Remember that file numbers start with one, not zero. */
20895 if (1 <= file
&& file
<= lh
->num_file_names
)
20897 char *relative
= file_file_name (file
, lh
);
20899 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
20901 return reconcat (relative
, comp_dir
, SLASH_STRING
,
20902 relative
, (char *) NULL
);
20905 return file_file_name (file
, lh
);
20909 static struct macro_source_file
*
20910 macro_start_file (int file
, int line
,
20911 struct macro_source_file
*current_file
,
20912 struct line_header
*lh
)
20914 /* File name relative to the compilation directory of this source file. */
20915 char *file_name
= file_file_name (file
, lh
);
20917 if (! current_file
)
20919 /* Note: We don't create a macro table for this compilation unit
20920 at all until we actually get a filename. */
20921 struct macro_table
*macro_table
= get_macro_table ();
20923 /* If we have no current file, then this must be the start_file
20924 directive for the compilation unit's main source file. */
20925 current_file
= macro_set_main (macro_table
, file_name
);
20926 macro_define_special (macro_table
);
20929 current_file
= macro_include (current_file
, line
, file_name
);
20933 return current_file
;
20937 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
20938 followed by a null byte. */
20940 copy_string (const char *buf
, int len
)
20942 char *s
= (char *) xmalloc (len
+ 1);
20944 memcpy (s
, buf
, len
);
20950 static const char *
20951 consume_improper_spaces (const char *p
, const char *body
)
20955 complaint (&symfile_complaints
,
20956 _("macro definition contains spaces "
20957 "in formal argument list:\n`%s'"),
20969 parse_macro_definition (struct macro_source_file
*file
, int line
,
20974 /* The body string takes one of two forms. For object-like macro
20975 definitions, it should be:
20977 <macro name> " " <definition>
20979 For function-like macro definitions, it should be:
20981 <macro name> "() " <definition>
20983 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
20985 Spaces may appear only where explicitly indicated, and in the
20988 The Dwarf 2 spec says that an object-like macro's name is always
20989 followed by a space, but versions of GCC around March 2002 omit
20990 the space when the macro's definition is the empty string.
20992 The Dwarf 2 spec says that there should be no spaces between the
20993 formal arguments in a function-like macro's formal argument list,
20994 but versions of GCC around March 2002 include spaces after the
20998 /* Find the extent of the macro name. The macro name is terminated
20999 by either a space or null character (for an object-like macro) or
21000 an opening paren (for a function-like macro). */
21001 for (p
= body
; *p
; p
++)
21002 if (*p
== ' ' || *p
== '(')
21005 if (*p
== ' ' || *p
== '\0')
21007 /* It's an object-like macro. */
21008 int name_len
= p
- body
;
21009 char *name
= copy_string (body
, name_len
);
21010 const char *replacement
;
21013 replacement
= body
+ name_len
+ 1;
21016 dwarf2_macro_malformed_definition_complaint (body
);
21017 replacement
= body
+ name_len
;
21020 macro_define_object (file
, line
, name
, replacement
);
21024 else if (*p
== '(')
21026 /* It's a function-like macro. */
21027 char *name
= copy_string (body
, p
- body
);
21030 char **argv
= XNEWVEC (char *, argv_size
);
21034 p
= consume_improper_spaces (p
, body
);
21036 /* Parse the formal argument list. */
21037 while (*p
&& *p
!= ')')
21039 /* Find the extent of the current argument name. */
21040 const char *arg_start
= p
;
21042 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
21045 if (! *p
|| p
== arg_start
)
21046 dwarf2_macro_malformed_definition_complaint (body
);
21049 /* Make sure argv has room for the new argument. */
21050 if (argc
>= argv_size
)
21053 argv
= XRESIZEVEC (char *, argv
, argv_size
);
21056 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
21059 p
= consume_improper_spaces (p
, body
);
21061 /* Consume the comma, if present. */
21066 p
= consume_improper_spaces (p
, body
);
21075 /* Perfectly formed definition, no complaints. */
21076 macro_define_function (file
, line
, name
,
21077 argc
, (const char **) argv
,
21079 else if (*p
== '\0')
21081 /* Complain, but do define it. */
21082 dwarf2_macro_malformed_definition_complaint (body
);
21083 macro_define_function (file
, line
, name
,
21084 argc
, (const char **) argv
,
21088 /* Just complain. */
21089 dwarf2_macro_malformed_definition_complaint (body
);
21092 /* Just complain. */
21093 dwarf2_macro_malformed_definition_complaint (body
);
21099 for (i
= 0; i
< argc
; i
++)
21105 dwarf2_macro_malformed_definition_complaint (body
);
21108 /* Skip some bytes from BYTES according to the form given in FORM.
21109 Returns the new pointer. */
21111 static const gdb_byte
*
21112 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
21113 enum dwarf_form form
,
21114 unsigned int offset_size
,
21115 struct dwarf2_section_info
*section
)
21117 unsigned int bytes_read
;
21121 case DW_FORM_data1
:
21126 case DW_FORM_data2
:
21130 case DW_FORM_data4
:
21134 case DW_FORM_data8
:
21138 case DW_FORM_string
:
21139 read_direct_string (abfd
, bytes
, &bytes_read
);
21140 bytes
+= bytes_read
;
21143 case DW_FORM_sec_offset
:
21145 case DW_FORM_GNU_strp_alt
:
21146 bytes
+= offset_size
;
21149 case DW_FORM_block
:
21150 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
21151 bytes
+= bytes_read
;
21154 case DW_FORM_block1
:
21155 bytes
+= 1 + read_1_byte (abfd
, bytes
);
21157 case DW_FORM_block2
:
21158 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
21160 case DW_FORM_block4
:
21161 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
21164 case DW_FORM_sdata
:
21165 case DW_FORM_udata
:
21166 case DW_FORM_GNU_addr_index
:
21167 case DW_FORM_GNU_str_index
:
21168 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
21171 dwarf2_section_buffer_overflow_complaint (section
);
21179 complaint (&symfile_complaints
,
21180 _("invalid form 0x%x in `%s'"),
21181 form
, get_section_name (section
));
21189 /* A helper for dwarf_decode_macros that handles skipping an unknown
21190 opcode. Returns an updated pointer to the macro data buffer; or,
21191 on error, issues a complaint and returns NULL. */
21193 static const gdb_byte
*
21194 skip_unknown_opcode (unsigned int opcode
,
21195 const gdb_byte
**opcode_definitions
,
21196 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
21198 unsigned int offset_size
,
21199 struct dwarf2_section_info
*section
)
21201 unsigned int bytes_read
, i
;
21203 const gdb_byte
*defn
;
21205 if (opcode_definitions
[opcode
] == NULL
)
21207 complaint (&symfile_complaints
,
21208 _("unrecognized DW_MACFINO opcode 0x%x"),
21213 defn
= opcode_definitions
[opcode
];
21214 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
21215 defn
+= bytes_read
;
21217 for (i
= 0; i
< arg
; ++i
)
21219 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
,
21220 (enum dwarf_form
) defn
[i
], offset_size
,
21222 if (mac_ptr
== NULL
)
21224 /* skip_form_bytes already issued the complaint. */
21232 /* A helper function which parses the header of a macro section.
21233 If the macro section is the extended (for now called "GNU") type,
21234 then this updates *OFFSET_SIZE. Returns a pointer to just after
21235 the header, or issues a complaint and returns NULL on error. */
21237 static const gdb_byte
*
21238 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
21240 const gdb_byte
*mac_ptr
,
21241 unsigned int *offset_size
,
21242 int section_is_gnu
)
21244 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
21246 if (section_is_gnu
)
21248 unsigned int version
, flags
;
21250 version
= read_2_bytes (abfd
, mac_ptr
);
21253 complaint (&symfile_complaints
,
21254 _("unrecognized version `%d' in .debug_macro section"),
21260 flags
= read_1_byte (abfd
, mac_ptr
);
21262 *offset_size
= (flags
& 1) ? 8 : 4;
21264 if ((flags
& 2) != 0)
21265 /* We don't need the line table offset. */
21266 mac_ptr
+= *offset_size
;
21268 /* Vendor opcode descriptions. */
21269 if ((flags
& 4) != 0)
21271 unsigned int i
, count
;
21273 count
= read_1_byte (abfd
, mac_ptr
);
21275 for (i
= 0; i
< count
; ++i
)
21277 unsigned int opcode
, bytes_read
;
21280 opcode
= read_1_byte (abfd
, mac_ptr
);
21282 opcode_definitions
[opcode
] = mac_ptr
;
21283 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21284 mac_ptr
+= bytes_read
;
21293 /* A helper for dwarf_decode_macros that handles the GNU extensions,
21294 including DW_MACRO_GNU_transparent_include. */
21297 dwarf_decode_macro_bytes (bfd
*abfd
,
21298 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
21299 struct macro_source_file
*current_file
,
21300 struct line_header
*lh
,
21301 struct dwarf2_section_info
*section
,
21302 int section_is_gnu
, int section_is_dwz
,
21303 unsigned int offset_size
,
21304 htab_t include_hash
)
21306 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21307 enum dwarf_macro_record_type macinfo_type
;
21308 int at_commandline
;
21309 const gdb_byte
*opcode_definitions
[256];
21311 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
21312 &offset_size
, section_is_gnu
);
21313 if (mac_ptr
== NULL
)
21315 /* We already issued a complaint. */
21319 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
21320 GDB is still reading the definitions from command line. First
21321 DW_MACINFO_start_file will need to be ignored as it was already executed
21322 to create CURRENT_FILE for the main source holding also the command line
21323 definitions. On first met DW_MACINFO_start_file this flag is reset to
21324 normally execute all the remaining DW_MACINFO_start_file macinfos. */
21326 at_commandline
= 1;
21330 /* Do we at least have room for a macinfo type byte? */
21331 if (mac_ptr
>= mac_end
)
21333 dwarf2_section_buffer_overflow_complaint (section
);
21337 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
21340 /* Note that we rely on the fact that the corresponding GNU and
21341 DWARF constants are the same. */
21342 switch (macinfo_type
)
21344 /* A zero macinfo type indicates the end of the macro
21349 case DW_MACRO_GNU_define
:
21350 case DW_MACRO_GNU_undef
:
21351 case DW_MACRO_GNU_define_indirect
:
21352 case DW_MACRO_GNU_undef_indirect
:
21353 case DW_MACRO_GNU_define_indirect_alt
:
21354 case DW_MACRO_GNU_undef_indirect_alt
:
21356 unsigned int bytes_read
;
21361 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21362 mac_ptr
+= bytes_read
;
21364 if (macinfo_type
== DW_MACRO_GNU_define
21365 || macinfo_type
== DW_MACRO_GNU_undef
)
21367 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21368 mac_ptr
+= bytes_read
;
21372 LONGEST str_offset
;
21374 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
21375 mac_ptr
+= offset_size
;
21377 if (macinfo_type
== DW_MACRO_GNU_define_indirect_alt
21378 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
21381 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
21383 body
= read_indirect_string_from_dwz (dwz
, str_offset
);
21386 body
= read_indirect_string_at_offset (abfd
, str_offset
);
21389 is_define
= (macinfo_type
== DW_MACRO_GNU_define
21390 || macinfo_type
== DW_MACRO_GNU_define_indirect
21391 || macinfo_type
== DW_MACRO_GNU_define_indirect_alt
);
21392 if (! current_file
)
21394 /* DWARF violation as no main source is present. */
21395 complaint (&symfile_complaints
,
21396 _("debug info with no main source gives macro %s "
21398 is_define
? _("definition") : _("undefinition"),
21402 if ((line
== 0 && !at_commandline
)
21403 || (line
!= 0 && at_commandline
))
21404 complaint (&symfile_complaints
,
21405 _("debug info gives %s macro %s with %s line %d: %s"),
21406 at_commandline
? _("command-line") : _("in-file"),
21407 is_define
? _("definition") : _("undefinition"),
21408 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
21411 parse_macro_definition (current_file
, line
, body
);
21414 gdb_assert (macinfo_type
== DW_MACRO_GNU_undef
21415 || macinfo_type
== DW_MACRO_GNU_undef_indirect
21416 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
);
21417 macro_undef (current_file
, line
, body
);
21422 case DW_MACRO_GNU_start_file
:
21424 unsigned int bytes_read
;
21427 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21428 mac_ptr
+= bytes_read
;
21429 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21430 mac_ptr
+= bytes_read
;
21432 if ((line
== 0 && !at_commandline
)
21433 || (line
!= 0 && at_commandline
))
21434 complaint (&symfile_complaints
,
21435 _("debug info gives source %d included "
21436 "from %s at %s line %d"),
21437 file
, at_commandline
? _("command-line") : _("file"),
21438 line
== 0 ? _("zero") : _("non-zero"), line
);
21440 if (at_commandline
)
21442 /* This DW_MACRO_GNU_start_file was executed in the
21444 at_commandline
= 0;
21447 current_file
= macro_start_file (file
, line
, current_file
, lh
);
21451 case DW_MACRO_GNU_end_file
:
21452 if (! current_file
)
21453 complaint (&symfile_complaints
,
21454 _("macro debug info has an unmatched "
21455 "`close_file' directive"));
21458 current_file
= current_file
->included_by
;
21459 if (! current_file
)
21461 enum dwarf_macro_record_type next_type
;
21463 /* GCC circa March 2002 doesn't produce the zero
21464 type byte marking the end of the compilation
21465 unit. Complain if it's not there, but exit no
21468 /* Do we at least have room for a macinfo type byte? */
21469 if (mac_ptr
>= mac_end
)
21471 dwarf2_section_buffer_overflow_complaint (section
);
21475 /* We don't increment mac_ptr here, so this is just
21478 = (enum dwarf_macro_record_type
) read_1_byte (abfd
,
21480 if (next_type
!= 0)
21481 complaint (&symfile_complaints
,
21482 _("no terminating 0-type entry for "
21483 "macros in `.debug_macinfo' section"));
21490 case DW_MACRO_GNU_transparent_include
:
21491 case DW_MACRO_GNU_transparent_include_alt
:
21495 bfd
*include_bfd
= abfd
;
21496 struct dwarf2_section_info
*include_section
= section
;
21497 const gdb_byte
*include_mac_end
= mac_end
;
21498 int is_dwz
= section_is_dwz
;
21499 const gdb_byte
*new_mac_ptr
;
21501 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
21502 mac_ptr
+= offset_size
;
21504 if (macinfo_type
== DW_MACRO_GNU_transparent_include_alt
)
21506 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
21508 dwarf2_read_section (objfile
, &dwz
->macro
);
21510 include_section
= &dwz
->macro
;
21511 include_bfd
= get_section_bfd_owner (include_section
);
21512 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
21516 new_mac_ptr
= include_section
->buffer
+ offset
;
21517 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
21521 /* This has actually happened; see
21522 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
21523 complaint (&symfile_complaints
,
21524 _("recursive DW_MACRO_GNU_transparent_include in "
21525 ".debug_macro section"));
21529 *slot
= (void *) new_mac_ptr
;
21531 dwarf_decode_macro_bytes (include_bfd
, new_mac_ptr
,
21532 include_mac_end
, current_file
, lh
,
21533 section
, section_is_gnu
, is_dwz
,
21534 offset_size
, include_hash
);
21536 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
21541 case DW_MACINFO_vendor_ext
:
21542 if (!section_is_gnu
)
21544 unsigned int bytes_read
;
21547 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21548 mac_ptr
+= bytes_read
;
21549 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21550 mac_ptr
+= bytes_read
;
21552 /* We don't recognize any vendor extensions. */
21558 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
21559 mac_ptr
, mac_end
, abfd
, offset_size
,
21561 if (mac_ptr
== NULL
)
21565 } while (macinfo_type
!= 0);
21569 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
21570 int section_is_gnu
)
21572 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21573 struct line_header
*lh
= cu
->line_header
;
21575 const gdb_byte
*mac_ptr
, *mac_end
;
21576 struct macro_source_file
*current_file
= 0;
21577 enum dwarf_macro_record_type macinfo_type
;
21578 unsigned int offset_size
= cu
->header
.offset_size
;
21579 const gdb_byte
*opcode_definitions
[256];
21580 struct cleanup
*cleanup
;
21581 htab_t include_hash
;
21583 struct dwarf2_section_info
*section
;
21584 const char *section_name
;
21586 if (cu
->dwo_unit
!= NULL
)
21588 if (section_is_gnu
)
21590 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
21591 section_name
= ".debug_macro.dwo";
21595 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
21596 section_name
= ".debug_macinfo.dwo";
21601 if (section_is_gnu
)
21603 section
= &dwarf2_per_objfile
->macro
;
21604 section_name
= ".debug_macro";
21608 section
= &dwarf2_per_objfile
->macinfo
;
21609 section_name
= ".debug_macinfo";
21613 dwarf2_read_section (objfile
, section
);
21614 if (section
->buffer
== NULL
)
21616 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
21619 abfd
= get_section_bfd_owner (section
);
21621 /* First pass: Find the name of the base filename.
21622 This filename is needed in order to process all macros whose definition
21623 (or undefinition) comes from the command line. These macros are defined
21624 before the first DW_MACINFO_start_file entry, and yet still need to be
21625 associated to the base file.
21627 To determine the base file name, we scan the macro definitions until we
21628 reach the first DW_MACINFO_start_file entry. We then initialize
21629 CURRENT_FILE accordingly so that any macro definition found before the
21630 first DW_MACINFO_start_file can still be associated to the base file. */
21632 mac_ptr
= section
->buffer
+ offset
;
21633 mac_end
= section
->buffer
+ section
->size
;
21635 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
21636 &offset_size
, section_is_gnu
);
21637 if (mac_ptr
== NULL
)
21639 /* We already issued a complaint. */
21645 /* Do we at least have room for a macinfo type byte? */
21646 if (mac_ptr
>= mac_end
)
21648 /* Complaint is printed during the second pass as GDB will probably
21649 stop the first pass earlier upon finding
21650 DW_MACINFO_start_file. */
21654 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
21657 /* Note that we rely on the fact that the corresponding GNU and
21658 DWARF constants are the same. */
21659 switch (macinfo_type
)
21661 /* A zero macinfo type indicates the end of the macro
21666 case DW_MACRO_GNU_define
:
21667 case DW_MACRO_GNU_undef
:
21668 /* Only skip the data by MAC_PTR. */
21670 unsigned int bytes_read
;
21672 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21673 mac_ptr
+= bytes_read
;
21674 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21675 mac_ptr
+= bytes_read
;
21679 case DW_MACRO_GNU_start_file
:
21681 unsigned int bytes_read
;
21684 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21685 mac_ptr
+= bytes_read
;
21686 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21687 mac_ptr
+= bytes_read
;
21689 current_file
= macro_start_file (file
, line
, current_file
, lh
);
21693 case DW_MACRO_GNU_end_file
:
21694 /* No data to skip by MAC_PTR. */
21697 case DW_MACRO_GNU_define_indirect
:
21698 case DW_MACRO_GNU_undef_indirect
:
21699 case DW_MACRO_GNU_define_indirect_alt
:
21700 case DW_MACRO_GNU_undef_indirect_alt
:
21702 unsigned int bytes_read
;
21704 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21705 mac_ptr
+= bytes_read
;
21706 mac_ptr
+= offset_size
;
21710 case DW_MACRO_GNU_transparent_include
:
21711 case DW_MACRO_GNU_transparent_include_alt
:
21712 /* Note that, according to the spec, a transparent include
21713 chain cannot call DW_MACRO_GNU_start_file. So, we can just
21714 skip this opcode. */
21715 mac_ptr
+= offset_size
;
21718 case DW_MACINFO_vendor_ext
:
21719 /* Only skip the data by MAC_PTR. */
21720 if (!section_is_gnu
)
21722 unsigned int bytes_read
;
21724 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21725 mac_ptr
+= bytes_read
;
21726 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21727 mac_ptr
+= bytes_read
;
21732 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
21733 mac_ptr
, mac_end
, abfd
, offset_size
,
21735 if (mac_ptr
== NULL
)
21739 } while (macinfo_type
!= 0 && current_file
== NULL
);
21741 /* Second pass: Process all entries.
21743 Use the AT_COMMAND_LINE flag to determine whether we are still processing
21744 command-line macro definitions/undefinitions. This flag is unset when we
21745 reach the first DW_MACINFO_start_file entry. */
21747 include_hash
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
21748 NULL
, xcalloc
, xfree
);
21749 cleanup
= make_cleanup_htab_delete (include_hash
);
21750 mac_ptr
= section
->buffer
+ offset
;
21751 slot
= htab_find_slot (include_hash
, mac_ptr
, INSERT
);
21752 *slot
= (void *) mac_ptr
;
21753 dwarf_decode_macro_bytes (abfd
, mac_ptr
, mac_end
,
21754 current_file
, lh
, section
,
21755 section_is_gnu
, 0, offset_size
, include_hash
);
21756 do_cleanups (cleanup
);
21759 /* Check if the attribute's form is a DW_FORM_block*
21760 if so return true else false. */
21763 attr_form_is_block (const struct attribute
*attr
)
21765 return (attr
== NULL
? 0 :
21766 attr
->form
== DW_FORM_block1
21767 || attr
->form
== DW_FORM_block2
21768 || attr
->form
== DW_FORM_block4
21769 || attr
->form
== DW_FORM_block
21770 || attr
->form
== DW_FORM_exprloc
);
21773 /* Return non-zero if ATTR's value is a section offset --- classes
21774 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
21775 You may use DW_UNSND (attr) to retrieve such offsets.
21777 Section 7.5.4, "Attribute Encodings", explains that no attribute
21778 may have a value that belongs to more than one of these classes; it
21779 would be ambiguous if we did, because we use the same forms for all
21783 attr_form_is_section_offset (const struct attribute
*attr
)
21785 return (attr
->form
== DW_FORM_data4
21786 || attr
->form
== DW_FORM_data8
21787 || attr
->form
== DW_FORM_sec_offset
);
21790 /* Return non-zero if ATTR's value falls in the 'constant' class, or
21791 zero otherwise. When this function returns true, you can apply
21792 dwarf2_get_attr_constant_value to it.
21794 However, note that for some attributes you must check
21795 attr_form_is_section_offset before using this test. DW_FORM_data4
21796 and DW_FORM_data8 are members of both the constant class, and of
21797 the classes that contain offsets into other debug sections
21798 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
21799 that, if an attribute's can be either a constant or one of the
21800 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
21801 taken as section offsets, not constants. */
21804 attr_form_is_constant (const struct attribute
*attr
)
21806 switch (attr
->form
)
21808 case DW_FORM_sdata
:
21809 case DW_FORM_udata
:
21810 case DW_FORM_data1
:
21811 case DW_FORM_data2
:
21812 case DW_FORM_data4
:
21813 case DW_FORM_data8
:
21821 /* DW_ADDR is always stored already as sect_offset; despite for the forms
21822 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
21825 attr_form_is_ref (const struct attribute
*attr
)
21827 switch (attr
->form
)
21829 case DW_FORM_ref_addr
:
21834 case DW_FORM_ref_udata
:
21835 case DW_FORM_GNU_ref_alt
:
21842 /* Return the .debug_loc section to use for CU.
21843 For DWO files use .debug_loc.dwo. */
21845 static struct dwarf2_section_info
*
21846 cu_debug_loc_section (struct dwarf2_cu
*cu
)
21849 return &cu
->dwo_unit
->dwo_file
->sections
.loc
;
21850 return &dwarf2_per_objfile
->loc
;
21853 /* A helper function that fills in a dwarf2_loclist_baton. */
21856 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
21857 struct dwarf2_loclist_baton
*baton
,
21858 const struct attribute
*attr
)
21860 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
21862 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
21864 baton
->per_cu
= cu
->per_cu
;
21865 gdb_assert (baton
->per_cu
);
21866 /* We don't know how long the location list is, but make sure we
21867 don't run off the edge of the section. */
21868 baton
->size
= section
->size
- DW_UNSND (attr
);
21869 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
21870 baton
->base_address
= cu
->base_address
;
21871 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
21875 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
21876 struct dwarf2_cu
*cu
, int is_block
)
21878 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21879 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
21881 if (attr_form_is_section_offset (attr
)
21882 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
21883 the section. If so, fall through to the complaint in the
21885 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
21887 struct dwarf2_loclist_baton
*baton
;
21889 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
21891 fill_in_loclist_baton (cu
, baton
, attr
);
21893 if (cu
->base_known
== 0)
21894 complaint (&symfile_complaints
,
21895 _("Location list used without "
21896 "specifying the CU base address."));
21898 SYMBOL_ACLASS_INDEX (sym
) = (is_block
21899 ? dwarf2_loclist_block_index
21900 : dwarf2_loclist_index
);
21901 SYMBOL_LOCATION_BATON (sym
) = baton
;
21905 struct dwarf2_locexpr_baton
*baton
;
21907 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
21908 baton
->per_cu
= cu
->per_cu
;
21909 gdb_assert (baton
->per_cu
);
21911 if (attr_form_is_block (attr
))
21913 /* Note that we're just copying the block's data pointer
21914 here, not the actual data. We're still pointing into the
21915 info_buffer for SYM's objfile; right now we never release
21916 that buffer, but when we do clean up properly this may
21918 baton
->size
= DW_BLOCK (attr
)->size
;
21919 baton
->data
= DW_BLOCK (attr
)->data
;
21923 dwarf2_invalid_attrib_class_complaint ("location description",
21924 SYMBOL_NATURAL_NAME (sym
));
21928 SYMBOL_ACLASS_INDEX (sym
) = (is_block
21929 ? dwarf2_locexpr_block_index
21930 : dwarf2_locexpr_index
);
21931 SYMBOL_LOCATION_BATON (sym
) = baton
;
21935 /* Return the OBJFILE associated with the compilation unit CU. If CU
21936 came from a separate debuginfo file, then the master objfile is
21940 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
21942 struct objfile
*objfile
= per_cu
->objfile
;
21944 /* Return the master objfile, so that we can report and look up the
21945 correct file containing this variable. */
21946 if (objfile
->separate_debug_objfile_backlink
)
21947 objfile
= objfile
->separate_debug_objfile_backlink
;
21952 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
21953 (CU_HEADERP is unused in such case) or prepare a temporary copy at
21954 CU_HEADERP first. */
21956 static const struct comp_unit_head
*
21957 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
21958 struct dwarf2_per_cu_data
*per_cu
)
21960 const gdb_byte
*info_ptr
;
21963 return &per_cu
->cu
->header
;
21965 info_ptr
= per_cu
->section
->buffer
+ per_cu
->offset
.sect_off
;
21967 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
21968 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->objfile
->obfd
);
21973 /* Return the address size given in the compilation unit header for CU. */
21976 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
21978 struct comp_unit_head cu_header_local
;
21979 const struct comp_unit_head
*cu_headerp
;
21981 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21983 return cu_headerp
->addr_size
;
21986 /* Return the offset size given in the compilation unit header for CU. */
21989 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
21991 struct comp_unit_head cu_header_local
;
21992 const struct comp_unit_head
*cu_headerp
;
21994 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21996 return cu_headerp
->offset_size
;
21999 /* See its dwarf2loc.h declaration. */
22002 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
22004 struct comp_unit_head cu_header_local
;
22005 const struct comp_unit_head
*cu_headerp
;
22007 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
22009 if (cu_headerp
->version
== 2)
22010 return cu_headerp
->addr_size
;
22012 return cu_headerp
->offset_size
;
22015 /* Return the text offset of the CU. The returned offset comes from
22016 this CU's objfile. If this objfile came from a separate debuginfo
22017 file, then the offset may be different from the corresponding
22018 offset in the parent objfile. */
22021 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
22023 struct objfile
*objfile
= per_cu
->objfile
;
22025 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
22028 /* Locate the .debug_info compilation unit from CU's objfile which contains
22029 the DIE at OFFSET. Raises an error on failure. */
22031 static struct dwarf2_per_cu_data
*
22032 dwarf2_find_containing_comp_unit (sect_offset offset
,
22033 unsigned int offset_in_dwz
,
22034 struct objfile
*objfile
)
22036 struct dwarf2_per_cu_data
*this_cu
;
22038 const sect_offset
*cu_off
;
22041 high
= dwarf2_per_objfile
->n_comp_units
- 1;
22044 struct dwarf2_per_cu_data
*mid_cu
;
22045 int mid
= low
+ (high
- low
) / 2;
22047 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
22048 cu_off
= &mid_cu
->offset
;
22049 if (mid_cu
->is_dwz
> offset_in_dwz
22050 || (mid_cu
->is_dwz
== offset_in_dwz
22051 && cu_off
->sect_off
>= offset
.sect_off
))
22056 gdb_assert (low
== high
);
22057 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
22058 cu_off
= &this_cu
->offset
;
22059 if (this_cu
->is_dwz
!= offset_in_dwz
|| cu_off
->sect_off
> offset
.sect_off
)
22061 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
22062 error (_("Dwarf Error: could not find partial DIE containing "
22063 "offset 0x%lx [in module %s]"),
22064 (long) offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
22066 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
.sect_off
22067 <= offset
.sect_off
);
22068 return dwarf2_per_objfile
->all_comp_units
[low
-1];
22072 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
22073 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
22074 && offset
.sect_off
>= this_cu
->offset
.sect_off
+ this_cu
->length
)
22075 error (_("invalid dwarf2 offset %u"), offset
.sect_off
);
22076 gdb_assert (offset
.sect_off
< this_cu
->offset
.sect_off
+ this_cu
->length
);
22081 /* Initialize dwarf2_cu CU, owned by PER_CU. */
22084 init_one_comp_unit (struct dwarf2_cu
*cu
, struct dwarf2_per_cu_data
*per_cu
)
22086 memset (cu
, 0, sizeof (*cu
));
22088 cu
->per_cu
= per_cu
;
22089 cu
->objfile
= per_cu
->objfile
;
22090 obstack_init (&cu
->comp_unit_obstack
);
22093 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
22096 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
22097 enum language pretend_language
)
22099 struct attribute
*attr
;
22101 /* Set the language we're debugging. */
22102 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
22104 set_cu_language (DW_UNSND (attr
), cu
);
22107 cu
->language
= pretend_language
;
22108 cu
->language_defn
= language_def (cu
->language
);
22111 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
22114 /* Release one cached compilation unit, CU. We unlink it from the tree
22115 of compilation units, but we don't remove it from the read_in_chain;
22116 the caller is responsible for that.
22117 NOTE: DATA is a void * because this function is also used as a
22118 cleanup routine. */
22121 free_heap_comp_unit (void *data
)
22123 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) data
;
22125 gdb_assert (cu
->per_cu
!= NULL
);
22126 cu
->per_cu
->cu
= NULL
;
22129 obstack_free (&cu
->comp_unit_obstack
, NULL
);
22134 /* This cleanup function is passed the address of a dwarf2_cu on the stack
22135 when we're finished with it. We can't free the pointer itself, but be
22136 sure to unlink it from the cache. Also release any associated storage. */
22139 free_stack_comp_unit (void *data
)
22141 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) data
;
22143 gdb_assert (cu
->per_cu
!= NULL
);
22144 cu
->per_cu
->cu
= NULL
;
22147 obstack_free (&cu
->comp_unit_obstack
, NULL
);
22148 cu
->partial_dies
= NULL
;
22151 /* Free all cached compilation units. */
22154 free_cached_comp_units (void *data
)
22156 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22158 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22159 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22160 while (per_cu
!= NULL
)
22162 struct dwarf2_per_cu_data
*next_cu
;
22164 next_cu
= per_cu
->cu
->read_in_chain
;
22166 free_heap_comp_unit (per_cu
->cu
);
22167 *last_chain
= next_cu
;
22173 /* Increase the age counter on each cached compilation unit, and free
22174 any that are too old. */
22177 age_cached_comp_units (void)
22179 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22181 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
22182 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22183 while (per_cu
!= NULL
)
22185 per_cu
->cu
->last_used
++;
22186 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
22187 dwarf2_mark (per_cu
->cu
);
22188 per_cu
= per_cu
->cu
->read_in_chain
;
22191 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22192 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22193 while (per_cu
!= NULL
)
22195 struct dwarf2_per_cu_data
*next_cu
;
22197 next_cu
= per_cu
->cu
->read_in_chain
;
22199 if (!per_cu
->cu
->mark
)
22201 free_heap_comp_unit (per_cu
->cu
);
22202 *last_chain
= next_cu
;
22205 last_chain
= &per_cu
->cu
->read_in_chain
;
22211 /* Remove a single compilation unit from the cache. */
22214 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
22216 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22218 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22219 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22220 while (per_cu
!= NULL
)
22222 struct dwarf2_per_cu_data
*next_cu
;
22224 next_cu
= per_cu
->cu
->read_in_chain
;
22226 if (per_cu
== target_per_cu
)
22228 free_heap_comp_unit (per_cu
->cu
);
22230 *last_chain
= next_cu
;
22234 last_chain
= &per_cu
->cu
->read_in_chain
;
22240 /* Release all extra memory associated with OBJFILE. */
22243 dwarf2_free_objfile (struct objfile
*objfile
)
22246 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
22247 dwarf2_objfile_data_key
);
22249 if (dwarf2_per_objfile
== NULL
)
22252 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
22253 free_cached_comp_units (NULL
);
22255 if (dwarf2_per_objfile
->quick_file_names_table
)
22256 htab_delete (dwarf2_per_objfile
->quick_file_names_table
);
22258 if (dwarf2_per_objfile
->line_header_hash
)
22259 htab_delete (dwarf2_per_objfile
->line_header_hash
);
22261 /* Everything else should be on the objfile obstack. */
22264 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
22265 We store these in a hash table separate from the DIEs, and preserve them
22266 when the DIEs are flushed out of cache.
22268 The CU "per_cu" pointer is needed because offset alone is not enough to
22269 uniquely identify the type. A file may have multiple .debug_types sections,
22270 or the type may come from a DWO file. Furthermore, while it's more logical
22271 to use per_cu->section+offset, with Fission the section with the data is in
22272 the DWO file but we don't know that section at the point we need it.
22273 We have to use something in dwarf2_per_cu_data (or the pointer to it)
22274 because we can enter the lookup routine, get_die_type_at_offset, from
22275 outside this file, and thus won't necessarily have PER_CU->cu.
22276 Fortunately, PER_CU is stable for the life of the objfile. */
22278 struct dwarf2_per_cu_offset_and_type
22280 const struct dwarf2_per_cu_data
*per_cu
;
22281 sect_offset offset
;
22285 /* Hash function for a dwarf2_per_cu_offset_and_type. */
22288 per_cu_offset_and_type_hash (const void *item
)
22290 const struct dwarf2_per_cu_offset_and_type
*ofs
22291 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
22293 return (uintptr_t) ofs
->per_cu
+ ofs
->offset
.sect_off
;
22296 /* Equality function for a dwarf2_per_cu_offset_and_type. */
22299 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
22301 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
22302 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
22303 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
22304 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
22306 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
22307 && ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
);
22310 /* Set the type associated with DIE to TYPE. Save it in CU's hash
22311 table if necessary. For convenience, return TYPE.
22313 The DIEs reading must have careful ordering to:
22314 * Not cause infite loops trying to read in DIEs as a prerequisite for
22315 reading current DIE.
22316 * Not trying to dereference contents of still incompletely read in types
22317 while reading in other DIEs.
22318 * Enable referencing still incompletely read in types just by a pointer to
22319 the type without accessing its fields.
22321 Therefore caller should follow these rules:
22322 * Try to fetch any prerequisite types we may need to build this DIE type
22323 before building the type and calling set_die_type.
22324 * After building type call set_die_type for current DIE as soon as
22325 possible before fetching more types to complete the current type.
22326 * Make the type as complete as possible before fetching more types. */
22328 static struct type
*
22329 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
22331 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
22332 struct objfile
*objfile
= cu
->objfile
;
22333 struct attribute
*attr
;
22334 struct dynamic_prop prop
;
22336 /* For Ada types, make sure that the gnat-specific data is always
22337 initialized (if not already set). There are a few types where
22338 we should not be doing so, because the type-specific area is
22339 already used to hold some other piece of info (eg: TYPE_CODE_FLT
22340 where the type-specific area is used to store the floatformat).
22341 But this is not a problem, because the gnat-specific information
22342 is actually not needed for these types. */
22343 if (need_gnat_info (cu
)
22344 && TYPE_CODE (type
) != TYPE_CODE_FUNC
22345 && TYPE_CODE (type
) != TYPE_CODE_FLT
22346 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
22347 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
22348 && TYPE_CODE (type
) != TYPE_CODE_METHOD
22349 && !HAVE_GNAT_AUX_INFO (type
))
22350 INIT_GNAT_SPECIFIC (type
);
22352 /* Read DW_AT_allocated and set in type. */
22353 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
22354 if (attr_form_is_block (attr
))
22356 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
22357 add_dyn_prop (DYN_PROP_ALLOCATED
, prop
, type
, objfile
);
22359 else if (attr
!= NULL
)
22361 complaint (&symfile_complaints
,
22362 _("DW_AT_allocated has the wrong form (%s) at DIE 0x%x"),
22363 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
22364 die
->offset
.sect_off
);
22367 /* Read DW_AT_associated and set in type. */
22368 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
22369 if (attr_form_is_block (attr
))
22371 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
22372 add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
, type
, objfile
);
22374 else if (attr
!= NULL
)
22376 complaint (&symfile_complaints
,
22377 _("DW_AT_associated has the wrong form (%s) at DIE 0x%x"),
22378 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
22379 die
->offset
.sect_off
);
22382 /* Read DW_AT_data_location and set in type. */
22383 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
22384 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
22385 add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
, type
, objfile
);
22387 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
22389 dwarf2_per_objfile
->die_type_hash
=
22390 htab_create_alloc_ex (127,
22391 per_cu_offset_and_type_hash
,
22392 per_cu_offset_and_type_eq
,
22394 &objfile
->objfile_obstack
,
22395 hashtab_obstack_allocate
,
22396 dummy_obstack_deallocate
);
22399 ofs
.per_cu
= cu
->per_cu
;
22400 ofs
.offset
= die
->offset
;
22402 slot
= (struct dwarf2_per_cu_offset_and_type
**)
22403 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
22405 complaint (&symfile_complaints
,
22406 _("A problem internal to GDB: DIE 0x%x has type already set"),
22407 die
->offset
.sect_off
);
22408 *slot
= XOBNEW (&objfile
->objfile_obstack
,
22409 struct dwarf2_per_cu_offset_and_type
);
22414 /* Look up the type for the die at OFFSET in PER_CU in die_type_hash,
22415 or return NULL if the die does not have a saved type. */
22417 static struct type
*
22418 get_die_type_at_offset (sect_offset offset
,
22419 struct dwarf2_per_cu_data
*per_cu
)
22421 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
22423 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
22426 ofs
.per_cu
= per_cu
;
22427 ofs
.offset
= offset
;
22428 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
22429 htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
));
22436 /* Look up the type for DIE in CU in die_type_hash,
22437 or return NULL if DIE does not have a saved type. */
22439 static struct type
*
22440 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22442 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
22445 /* Add a dependence relationship from CU to REF_PER_CU. */
22448 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
22449 struct dwarf2_per_cu_data
*ref_per_cu
)
22453 if (cu
->dependencies
== NULL
)
22455 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
22456 NULL
, &cu
->comp_unit_obstack
,
22457 hashtab_obstack_allocate
,
22458 dummy_obstack_deallocate
);
22460 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
22462 *slot
= ref_per_cu
;
22465 /* Subroutine of dwarf2_mark to pass to htab_traverse.
22466 Set the mark field in every compilation unit in the
22467 cache that we must keep because we are keeping CU. */
22470 dwarf2_mark_helper (void **slot
, void *data
)
22472 struct dwarf2_per_cu_data
*per_cu
;
22474 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
22476 /* cu->dependencies references may not yet have been ever read if QUIT aborts
22477 reading of the chain. As such dependencies remain valid it is not much
22478 useful to track and undo them during QUIT cleanups. */
22479 if (per_cu
->cu
== NULL
)
22482 if (per_cu
->cu
->mark
)
22484 per_cu
->cu
->mark
= 1;
22486 if (per_cu
->cu
->dependencies
!= NULL
)
22487 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
22492 /* Set the mark field in CU and in every other compilation unit in the
22493 cache that we must keep because we are keeping CU. */
22496 dwarf2_mark (struct dwarf2_cu
*cu
)
22501 if (cu
->dependencies
!= NULL
)
22502 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
22506 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
22510 per_cu
->cu
->mark
= 0;
22511 per_cu
= per_cu
->cu
->read_in_chain
;
22515 /* Trivial hash function for partial_die_info: the hash value of a DIE
22516 is its offset in .debug_info for this objfile. */
22519 partial_die_hash (const void *item
)
22521 const struct partial_die_info
*part_die
22522 = (const struct partial_die_info
*) item
;
22524 return part_die
->offset
.sect_off
;
22527 /* Trivial comparison function for partial_die_info structures: two DIEs
22528 are equal if they have the same offset. */
22531 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
22533 const struct partial_die_info
*part_die_lhs
22534 = (const struct partial_die_info
*) item_lhs
;
22535 const struct partial_die_info
*part_die_rhs
22536 = (const struct partial_die_info
*) item_rhs
;
22538 return part_die_lhs
->offset
.sect_off
== part_die_rhs
->offset
.sect_off
;
22541 static struct cmd_list_element
*set_dwarf_cmdlist
;
22542 static struct cmd_list_element
*show_dwarf_cmdlist
;
22545 set_dwarf_cmd (char *args
, int from_tty
)
22547 help_list (set_dwarf_cmdlist
, "maintenance set dwarf ", all_commands
,
22552 show_dwarf_cmd (char *args
, int from_tty
)
22554 cmd_show_list (show_dwarf_cmdlist
, from_tty
, "");
22557 /* Free data associated with OBJFILE, if necessary. */
22560 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
22562 struct dwarf2_per_objfile
*data
= (struct dwarf2_per_objfile
*) d
;
22565 /* Make sure we don't accidentally use dwarf2_per_objfile while
22567 dwarf2_per_objfile
= NULL
;
22569 for (ix
= 0; ix
< data
->n_comp_units
; ++ix
)
22570 VEC_free (dwarf2_per_cu_ptr
, data
->all_comp_units
[ix
]->imported_symtabs
);
22572 for (ix
= 0; ix
< data
->n_type_units
; ++ix
)
22573 VEC_free (dwarf2_per_cu_ptr
,
22574 data
->all_type_units
[ix
]->per_cu
.imported_symtabs
);
22575 xfree (data
->all_type_units
);
22577 VEC_free (dwarf2_section_info_def
, data
->types
);
22579 if (data
->dwo_files
)
22580 free_dwo_files (data
->dwo_files
, objfile
);
22581 if (data
->dwp_file
)
22582 gdb_bfd_unref (data
->dwp_file
->dbfd
);
22584 if (data
->dwz_file
&& data
->dwz_file
->dwz_bfd
)
22585 gdb_bfd_unref (data
->dwz_file
->dwz_bfd
);
22589 /* The "save gdb-index" command. */
22591 /* The contents of the hash table we create when building the string
22593 struct strtab_entry
22595 offset_type offset
;
22599 /* Hash function for a strtab_entry.
22601 Function is used only during write_hash_table so no index format backward
22602 compatibility is needed. */
22605 hash_strtab_entry (const void *e
)
22607 const struct strtab_entry
*entry
= (const struct strtab_entry
*) e
;
22608 return mapped_index_string_hash (INT_MAX
, entry
->str
);
22611 /* Equality function for a strtab_entry. */
22614 eq_strtab_entry (const void *a
, const void *b
)
22616 const struct strtab_entry
*ea
= (const struct strtab_entry
*) a
;
22617 const struct strtab_entry
*eb
= (const struct strtab_entry
*) b
;
22618 return !strcmp (ea
->str
, eb
->str
);
22621 /* Create a strtab_entry hash table. */
22624 create_strtab (void)
22626 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
22627 xfree
, xcalloc
, xfree
);
22630 /* Add a string to the constant pool. Return the string's offset in
22634 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
22637 struct strtab_entry entry
;
22638 struct strtab_entry
*result
;
22641 slot
= htab_find_slot (table
, &entry
, INSERT
);
22643 result
= (struct strtab_entry
*) *slot
;
22646 result
= XNEW (struct strtab_entry
);
22647 result
->offset
= obstack_object_size (cpool
);
22649 obstack_grow_str0 (cpool
, str
);
22652 return result
->offset
;
22655 /* An entry in the symbol table. */
22656 struct symtab_index_entry
22658 /* The name of the symbol. */
22660 /* The offset of the name in the constant pool. */
22661 offset_type index_offset
;
22662 /* A sorted vector of the indices of all the CUs that hold an object
22664 VEC (offset_type
) *cu_indices
;
22667 /* The symbol table. This is a power-of-2-sized hash table. */
22668 struct mapped_symtab
22670 offset_type n_elements
;
22672 struct symtab_index_entry
**data
;
22675 /* Hash function for a symtab_index_entry. */
22678 hash_symtab_entry (const void *e
)
22680 const struct symtab_index_entry
*entry
22681 = (const struct symtab_index_entry
*) e
;
22682 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
22683 sizeof (offset_type
) * VEC_length (offset_type
,
22684 entry
->cu_indices
),
22688 /* Equality function for a symtab_index_entry. */
22691 eq_symtab_entry (const void *a
, const void *b
)
22693 const struct symtab_index_entry
*ea
= (const struct symtab_index_entry
*) a
;
22694 const struct symtab_index_entry
*eb
= (const struct symtab_index_entry
*) b
;
22695 int len
= VEC_length (offset_type
, ea
->cu_indices
);
22696 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
22698 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
22699 VEC_address (offset_type
, eb
->cu_indices
),
22700 sizeof (offset_type
) * len
);
22703 /* Destroy a symtab_index_entry. */
22706 delete_symtab_entry (void *p
)
22708 struct symtab_index_entry
*entry
= (struct symtab_index_entry
*) p
;
22709 VEC_free (offset_type
, entry
->cu_indices
);
22713 /* Create a hash table holding symtab_index_entry objects. */
22716 create_symbol_hash_table (void)
22718 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
22719 delete_symtab_entry
, xcalloc
, xfree
);
22722 /* Create a new mapped symtab object. */
22724 static struct mapped_symtab
*
22725 create_mapped_symtab (void)
22727 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
22728 symtab
->n_elements
= 0;
22729 symtab
->size
= 1024;
22730 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
22734 /* Destroy a mapped_symtab. */
22737 cleanup_mapped_symtab (void *p
)
22739 struct mapped_symtab
*symtab
= (struct mapped_symtab
*) p
;
22740 /* The contents of the array are freed when the other hash table is
22742 xfree (symtab
->data
);
22746 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
22749 Function is used only during write_hash_table so no index format backward
22750 compatibility is needed. */
22752 static struct symtab_index_entry
**
22753 find_slot (struct mapped_symtab
*symtab
, const char *name
)
22755 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
22757 index
= hash
& (symtab
->size
- 1);
22758 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
22762 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
22763 return &symtab
->data
[index
];
22764 index
= (index
+ step
) & (symtab
->size
- 1);
22768 /* Expand SYMTAB's hash table. */
22771 hash_expand (struct mapped_symtab
*symtab
)
22773 offset_type old_size
= symtab
->size
;
22775 struct symtab_index_entry
**old_entries
= symtab
->data
;
22778 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
22780 for (i
= 0; i
< old_size
; ++i
)
22782 if (old_entries
[i
])
22784 struct symtab_index_entry
**slot
= find_slot (symtab
,
22785 old_entries
[i
]->name
);
22786 *slot
= old_entries
[i
];
22790 xfree (old_entries
);
22793 /* Add an entry to SYMTAB. NAME is the name of the symbol.
22794 CU_INDEX is the index of the CU in which the symbol appears.
22795 IS_STATIC is one if the symbol is static, otherwise zero (global). */
22798 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
22799 int is_static
, gdb_index_symbol_kind kind
,
22800 offset_type cu_index
)
22802 struct symtab_index_entry
**slot
;
22803 offset_type cu_index_and_attrs
;
22805 ++symtab
->n_elements
;
22806 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
22807 hash_expand (symtab
);
22809 slot
= find_slot (symtab
, name
);
22812 *slot
= XNEW (struct symtab_index_entry
);
22813 (*slot
)->name
= name
;
22814 /* index_offset is set later. */
22815 (*slot
)->cu_indices
= NULL
;
22818 cu_index_and_attrs
= 0;
22819 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs
, cu_index
);
22820 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs
, is_static
);
22821 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs
, kind
);
22823 /* We don't want to record an index value twice as we want to avoid the
22825 We process all global symbols and then all static symbols
22826 (which would allow us to avoid the duplication by only having to check
22827 the last entry pushed), but a symbol could have multiple kinds in one CU.
22828 To keep things simple we don't worry about the duplication here and
22829 sort and uniqufy the list after we've processed all symbols. */
22830 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index_and_attrs
);
22833 /* qsort helper routine for uniquify_cu_indices. */
22836 offset_type_compare (const void *ap
, const void *bp
)
22838 offset_type a
= *(offset_type
*) ap
;
22839 offset_type b
= *(offset_type
*) bp
;
22841 return (a
> b
) - (b
> a
);
22844 /* Sort and remove duplicates of all symbols' cu_indices lists. */
22847 uniquify_cu_indices (struct mapped_symtab
*symtab
)
22851 for (i
= 0; i
< symtab
->size
; ++i
)
22853 struct symtab_index_entry
*entry
= symtab
->data
[i
];
22856 && entry
->cu_indices
!= NULL
)
22858 unsigned int next_to_insert
, next_to_check
;
22859 offset_type last_value
;
22861 qsort (VEC_address (offset_type
, entry
->cu_indices
),
22862 VEC_length (offset_type
, entry
->cu_indices
),
22863 sizeof (offset_type
), offset_type_compare
);
22865 last_value
= VEC_index (offset_type
, entry
->cu_indices
, 0);
22866 next_to_insert
= 1;
22867 for (next_to_check
= 1;
22868 next_to_check
< VEC_length (offset_type
, entry
->cu_indices
);
22871 if (VEC_index (offset_type
, entry
->cu_indices
, next_to_check
)
22874 last_value
= VEC_index (offset_type
, entry
->cu_indices
,
22876 VEC_replace (offset_type
, entry
->cu_indices
, next_to_insert
,
22881 VEC_truncate (offset_type
, entry
->cu_indices
, next_to_insert
);
22886 /* Add a vector of indices to the constant pool. */
22889 add_indices_to_cpool (htab_t symbol_hash_table
, struct obstack
*cpool
,
22890 struct symtab_index_entry
*entry
)
22894 slot
= htab_find_slot (symbol_hash_table
, entry
, INSERT
);
22897 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
22898 offset_type val
= MAYBE_SWAP (len
);
22903 entry
->index_offset
= obstack_object_size (cpool
);
22905 obstack_grow (cpool
, &val
, sizeof (val
));
22907 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
22910 val
= MAYBE_SWAP (iter
);
22911 obstack_grow (cpool
, &val
, sizeof (val
));
22916 struct symtab_index_entry
*old_entry
22917 = (struct symtab_index_entry
*) *slot
;
22918 entry
->index_offset
= old_entry
->index_offset
;
22921 return entry
->index_offset
;
22924 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
22925 constant pool entries going into the obstack CPOOL. */
22928 write_hash_table (struct mapped_symtab
*symtab
,
22929 struct obstack
*output
, struct obstack
*cpool
)
22932 htab_t symbol_hash_table
;
22935 symbol_hash_table
= create_symbol_hash_table ();
22936 str_table
= create_strtab ();
22938 /* We add all the index vectors to the constant pool first, to
22939 ensure alignment is ok. */
22940 for (i
= 0; i
< symtab
->size
; ++i
)
22942 if (symtab
->data
[i
])
22943 add_indices_to_cpool (symbol_hash_table
, cpool
, symtab
->data
[i
]);
22946 /* Now write out the hash table. */
22947 for (i
= 0; i
< symtab
->size
; ++i
)
22949 offset_type str_off
, vec_off
;
22951 if (symtab
->data
[i
])
22953 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
22954 vec_off
= symtab
->data
[i
]->index_offset
;
22958 /* While 0 is a valid constant pool index, it is not valid
22959 to have 0 for both offsets. */
22964 str_off
= MAYBE_SWAP (str_off
);
22965 vec_off
= MAYBE_SWAP (vec_off
);
22967 obstack_grow (output
, &str_off
, sizeof (str_off
));
22968 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
22971 htab_delete (str_table
);
22972 htab_delete (symbol_hash_table
);
22975 /* Struct to map psymtab to CU index in the index file. */
22976 struct psymtab_cu_index_map
22978 struct partial_symtab
*psymtab
;
22979 unsigned int cu_index
;
22983 hash_psymtab_cu_index (const void *item
)
22985 const struct psymtab_cu_index_map
*map
22986 = (const struct psymtab_cu_index_map
*) item
;
22988 return htab_hash_pointer (map
->psymtab
);
22992 eq_psymtab_cu_index (const void *item_lhs
, const void *item_rhs
)
22994 const struct psymtab_cu_index_map
*lhs
22995 = (const struct psymtab_cu_index_map
*) item_lhs
;
22996 const struct psymtab_cu_index_map
*rhs
22997 = (const struct psymtab_cu_index_map
*) item_rhs
;
22999 return lhs
->psymtab
== rhs
->psymtab
;
23002 /* Helper struct for building the address table. */
23003 struct addrmap_index_data
23005 struct objfile
*objfile
;
23006 struct obstack
*addr_obstack
;
23007 htab_t cu_index_htab
;
23009 /* Non-zero if the previous_* fields are valid.
23010 We can't write an entry until we see the next entry (since it is only then
23011 that we know the end of the entry). */
23012 int previous_valid
;
23013 /* Index of the CU in the table of all CUs in the index file. */
23014 unsigned int previous_cu_index
;
23015 /* Start address of the CU. */
23016 CORE_ADDR previous_cu_start
;
23019 /* Write an address entry to OBSTACK. */
23022 add_address_entry (struct objfile
*objfile
, struct obstack
*obstack
,
23023 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
23025 offset_type cu_index_to_write
;
23027 CORE_ADDR baseaddr
;
23029 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
23031 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
23032 obstack_grow (obstack
, addr
, 8);
23033 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
23034 obstack_grow (obstack
, addr
, 8);
23035 cu_index_to_write
= MAYBE_SWAP (cu_index
);
23036 obstack_grow (obstack
, &cu_index_to_write
, sizeof (offset_type
));
23039 /* Worker function for traversing an addrmap to build the address table. */
23042 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
23044 struct addrmap_index_data
*data
= (struct addrmap_index_data
*) datap
;
23045 struct partial_symtab
*pst
= (struct partial_symtab
*) obj
;
23047 if (data
->previous_valid
)
23048 add_address_entry (data
->objfile
, data
->addr_obstack
,
23049 data
->previous_cu_start
, start_addr
,
23050 data
->previous_cu_index
);
23052 data
->previous_cu_start
= start_addr
;
23055 struct psymtab_cu_index_map find_map
, *map
;
23056 find_map
.psymtab
= pst
;
23057 map
= ((struct psymtab_cu_index_map
*)
23058 htab_find (data
->cu_index_htab
, &find_map
));
23059 gdb_assert (map
!= NULL
);
23060 data
->previous_cu_index
= map
->cu_index
;
23061 data
->previous_valid
= 1;
23064 data
->previous_valid
= 0;
23069 /* Write OBJFILE's address map to OBSTACK.
23070 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
23071 in the index file. */
23074 write_address_map (struct objfile
*objfile
, struct obstack
*obstack
,
23075 htab_t cu_index_htab
)
23077 struct addrmap_index_data addrmap_index_data
;
23079 /* When writing the address table, we have to cope with the fact that
23080 the addrmap iterator only provides the start of a region; we have to
23081 wait until the next invocation to get the start of the next region. */
23083 addrmap_index_data
.objfile
= objfile
;
23084 addrmap_index_data
.addr_obstack
= obstack
;
23085 addrmap_index_data
.cu_index_htab
= cu_index_htab
;
23086 addrmap_index_data
.previous_valid
= 0;
23088 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
23089 &addrmap_index_data
);
23091 /* It's highly unlikely the last entry (end address = 0xff...ff)
23092 is valid, but we should still handle it.
23093 The end address is recorded as the start of the next region, but that
23094 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
23096 if (addrmap_index_data
.previous_valid
)
23097 add_address_entry (objfile
, obstack
,
23098 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
23099 addrmap_index_data
.previous_cu_index
);
23102 /* Return the symbol kind of PSYM. */
23104 static gdb_index_symbol_kind
23105 symbol_kind (struct partial_symbol
*psym
)
23107 domain_enum domain
= PSYMBOL_DOMAIN (psym
);
23108 enum address_class aclass
= PSYMBOL_CLASS (psym
);
23116 return GDB_INDEX_SYMBOL_KIND_FUNCTION
;
23118 return GDB_INDEX_SYMBOL_KIND_TYPE
;
23120 case LOC_CONST_BYTES
:
23121 case LOC_OPTIMIZED_OUT
:
23123 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
23125 /* Note: It's currently impossible to recognize psyms as enum values
23126 short of reading the type info. For now punt. */
23127 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
23129 /* There are other LOC_FOO values that one might want to classify
23130 as variables, but dwarf2read.c doesn't currently use them. */
23131 return GDB_INDEX_SYMBOL_KIND_OTHER
;
23133 case STRUCT_DOMAIN
:
23134 return GDB_INDEX_SYMBOL_KIND_TYPE
;
23136 return GDB_INDEX_SYMBOL_KIND_OTHER
;
23140 /* Add a list of partial symbols to SYMTAB. */
23143 write_psymbols (struct mapped_symtab
*symtab
,
23145 struct partial_symbol
**psymp
,
23147 offset_type cu_index
,
23150 for (; count
-- > 0; ++psymp
)
23152 struct partial_symbol
*psym
= *psymp
;
23155 if (SYMBOL_LANGUAGE (psym
) == language_ada
)
23156 error (_("Ada is not currently supported by the index"));
23158 /* Only add a given psymbol once. */
23159 slot
= htab_find_slot (psyms_seen
, psym
, INSERT
);
23162 gdb_index_symbol_kind kind
= symbol_kind (psym
);
23165 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (psym
),
23166 is_static
, kind
, cu_index
);
23171 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
23172 exception if there is an error. */
23175 write_obstack (FILE *file
, struct obstack
*obstack
)
23177 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
23179 != obstack_object_size (obstack
))
23180 error (_("couldn't data write to file"));
23183 /* Unlink a file if the argument is not NULL. */
23186 unlink_if_set (void *p
)
23188 char **filename
= (char **) p
;
23190 unlink (*filename
);
23193 /* A helper struct used when iterating over debug_types. */
23194 struct signatured_type_index_data
23196 struct objfile
*objfile
;
23197 struct mapped_symtab
*symtab
;
23198 struct obstack
*types_list
;
23203 /* A helper function that writes a single signatured_type to an
23207 write_one_signatured_type (void **slot
, void *d
)
23209 struct signatured_type_index_data
*info
23210 = (struct signatured_type_index_data
*) d
;
23211 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
23212 struct partial_symtab
*psymtab
= entry
->per_cu
.v
.psymtab
;
23215 write_psymbols (info
->symtab
,
23217 info
->objfile
->global_psymbols
.list
23218 + psymtab
->globals_offset
,
23219 psymtab
->n_global_syms
, info
->cu_index
,
23221 write_psymbols (info
->symtab
,
23223 info
->objfile
->static_psymbols
.list
23224 + psymtab
->statics_offset
,
23225 psymtab
->n_static_syms
, info
->cu_index
,
23228 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23229 entry
->per_cu
.offset
.sect_off
);
23230 obstack_grow (info
->types_list
, val
, 8);
23231 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23232 entry
->type_offset_in_tu
.cu_off
);
23233 obstack_grow (info
->types_list
, val
, 8);
23234 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
23235 obstack_grow (info
->types_list
, val
, 8);
23242 /* Recurse into all "included" dependencies and write their symbols as
23243 if they appeared in this psymtab. */
23246 recursively_write_psymbols (struct objfile
*objfile
,
23247 struct partial_symtab
*psymtab
,
23248 struct mapped_symtab
*symtab
,
23250 offset_type cu_index
)
23254 for (i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
23255 if (psymtab
->dependencies
[i
]->user
!= NULL
)
23256 recursively_write_psymbols (objfile
, psymtab
->dependencies
[i
],
23257 symtab
, psyms_seen
, cu_index
);
23259 write_psymbols (symtab
,
23261 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
23262 psymtab
->n_global_syms
, cu_index
,
23264 write_psymbols (symtab
,
23266 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
23267 psymtab
->n_static_syms
, cu_index
,
23271 /* Create an index file for OBJFILE in the directory DIR. */
23274 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
23276 struct cleanup
*cleanup
;
23277 char *filename
, *cleanup_filename
;
23278 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
23279 struct obstack cu_list
, types_cu_list
;
23282 struct mapped_symtab
*symtab
;
23283 offset_type val
, size_of_contents
, total_len
;
23286 htab_t cu_index_htab
;
23287 struct psymtab_cu_index_map
*psymtab_cu_index_map
;
23289 if (dwarf2_per_objfile
->using_index
)
23290 error (_("Cannot use an index to create the index"));
23292 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
23293 error (_("Cannot make an index when the file has multiple .debug_types sections"));
23295 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
23298 if (stat (objfile_name (objfile
), &st
) < 0)
23299 perror_with_name (objfile_name (objfile
));
23301 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile_name (objfile
)),
23302 INDEX_SUFFIX
, (char *) NULL
);
23303 cleanup
= make_cleanup (xfree
, filename
);
23305 out_file
= gdb_fopen_cloexec (filename
, "wb");
23307 error (_("Can't open `%s' for writing"), filename
);
23309 cleanup_filename
= filename
;
23310 make_cleanup (unlink_if_set
, &cleanup_filename
);
23312 symtab
= create_mapped_symtab ();
23313 make_cleanup (cleanup_mapped_symtab
, symtab
);
23315 obstack_init (&addr_obstack
);
23316 make_cleanup_obstack_free (&addr_obstack
);
23318 obstack_init (&cu_list
);
23319 make_cleanup_obstack_free (&cu_list
);
23321 obstack_init (&types_cu_list
);
23322 make_cleanup_obstack_free (&types_cu_list
);
23324 psyms_seen
= htab_create_alloc (100, htab_hash_pointer
, htab_eq_pointer
,
23325 NULL
, xcalloc
, xfree
);
23326 make_cleanup_htab_delete (psyms_seen
);
23328 /* While we're scanning CU's create a table that maps a psymtab pointer
23329 (which is what addrmap records) to its index (which is what is recorded
23330 in the index file). This will later be needed to write the address
23332 cu_index_htab
= htab_create_alloc (100,
23333 hash_psymtab_cu_index
,
23334 eq_psymtab_cu_index
,
23335 NULL
, xcalloc
, xfree
);
23336 make_cleanup_htab_delete (cu_index_htab
);
23337 psymtab_cu_index_map
= XNEWVEC (struct psymtab_cu_index_map
,
23338 dwarf2_per_objfile
->n_comp_units
);
23339 make_cleanup (xfree
, psymtab_cu_index_map
);
23341 /* The CU list is already sorted, so we don't need to do additional
23342 work here. Also, the debug_types entries do not appear in
23343 all_comp_units, but only in their own hash table. */
23344 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
23346 struct dwarf2_per_cu_data
*per_cu
23347 = dwarf2_per_objfile
->all_comp_units
[i
];
23348 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
23350 struct psymtab_cu_index_map
*map
;
23353 /* CU of a shared file from 'dwz -m' may be unused by this main file.
23354 It may be referenced from a local scope but in such case it does not
23355 need to be present in .gdb_index. */
23356 if (psymtab
== NULL
)
23359 if (psymtab
->user
== NULL
)
23360 recursively_write_psymbols (objfile
, psymtab
, symtab
, psyms_seen
, i
);
23362 map
= &psymtab_cu_index_map
[i
];
23363 map
->psymtab
= psymtab
;
23365 slot
= htab_find_slot (cu_index_htab
, map
, INSERT
);
23366 gdb_assert (slot
!= NULL
);
23367 gdb_assert (*slot
== NULL
);
23370 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23371 per_cu
->offset
.sect_off
);
23372 obstack_grow (&cu_list
, val
, 8);
23373 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
23374 obstack_grow (&cu_list
, val
, 8);
23377 /* Dump the address map. */
23378 write_address_map (objfile
, &addr_obstack
, cu_index_htab
);
23380 /* Write out the .debug_type entries, if any. */
23381 if (dwarf2_per_objfile
->signatured_types
)
23383 struct signatured_type_index_data sig_data
;
23385 sig_data
.objfile
= objfile
;
23386 sig_data
.symtab
= symtab
;
23387 sig_data
.types_list
= &types_cu_list
;
23388 sig_data
.psyms_seen
= psyms_seen
;
23389 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
23390 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
23391 write_one_signatured_type
, &sig_data
);
23394 /* Now that we've processed all symbols we can shrink their cu_indices
23396 uniquify_cu_indices (symtab
);
23398 obstack_init (&constant_pool
);
23399 make_cleanup_obstack_free (&constant_pool
);
23400 obstack_init (&symtab_obstack
);
23401 make_cleanup_obstack_free (&symtab_obstack
);
23402 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
23404 obstack_init (&contents
);
23405 make_cleanup_obstack_free (&contents
);
23406 size_of_contents
= 6 * sizeof (offset_type
);
23407 total_len
= size_of_contents
;
23409 /* The version number. */
23410 val
= MAYBE_SWAP (8);
23411 obstack_grow (&contents
, &val
, sizeof (val
));
23413 /* The offset of the CU list from the start of the file. */
23414 val
= MAYBE_SWAP (total_len
);
23415 obstack_grow (&contents
, &val
, sizeof (val
));
23416 total_len
+= obstack_object_size (&cu_list
);
23418 /* The offset of the types CU list from the start of the file. */
23419 val
= MAYBE_SWAP (total_len
);
23420 obstack_grow (&contents
, &val
, sizeof (val
));
23421 total_len
+= obstack_object_size (&types_cu_list
);
23423 /* The offset of the address table from the start of the file. */
23424 val
= MAYBE_SWAP (total_len
);
23425 obstack_grow (&contents
, &val
, sizeof (val
));
23426 total_len
+= obstack_object_size (&addr_obstack
);
23428 /* The offset of the symbol table from the start of the file. */
23429 val
= MAYBE_SWAP (total_len
);
23430 obstack_grow (&contents
, &val
, sizeof (val
));
23431 total_len
+= obstack_object_size (&symtab_obstack
);
23433 /* The offset of the constant pool from the start of the file. */
23434 val
= MAYBE_SWAP (total_len
);
23435 obstack_grow (&contents
, &val
, sizeof (val
));
23436 total_len
+= obstack_object_size (&constant_pool
);
23438 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
23440 write_obstack (out_file
, &contents
);
23441 write_obstack (out_file
, &cu_list
);
23442 write_obstack (out_file
, &types_cu_list
);
23443 write_obstack (out_file
, &addr_obstack
);
23444 write_obstack (out_file
, &symtab_obstack
);
23445 write_obstack (out_file
, &constant_pool
);
23449 /* We want to keep the file, so we set cleanup_filename to NULL
23450 here. See unlink_if_set. */
23451 cleanup_filename
= NULL
;
23453 do_cleanups (cleanup
);
23456 /* Implementation of the `save gdb-index' command.
23458 Note that the file format used by this command is documented in the
23459 GDB manual. Any changes here must be documented there. */
23462 save_gdb_index_command (char *arg
, int from_tty
)
23464 struct objfile
*objfile
;
23467 error (_("usage: save gdb-index DIRECTORY"));
23469 ALL_OBJFILES (objfile
)
23473 /* If the objfile does not correspond to an actual file, skip it. */
23474 if (stat (objfile_name (objfile
), &st
) < 0)
23478 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
23479 dwarf2_objfile_data_key
);
23480 if (dwarf2_per_objfile
)
23485 write_psymtabs_to_index (objfile
, arg
);
23487 CATCH (except
, RETURN_MASK_ERROR
)
23489 exception_fprintf (gdb_stderr
, except
,
23490 _("Error while writing index for `%s': "),
23491 objfile_name (objfile
));
23500 int dwarf_always_disassemble
;
23503 show_dwarf_always_disassemble (struct ui_file
*file
, int from_tty
,
23504 struct cmd_list_element
*c
, const char *value
)
23506 fprintf_filtered (file
,
23507 _("Whether to always disassemble "
23508 "DWARF expressions is %s.\n"),
23513 show_check_physname (struct ui_file
*file
, int from_tty
,
23514 struct cmd_list_element
*c
, const char *value
)
23516 fprintf_filtered (file
,
23517 _("Whether to check \"physname\" is %s.\n"),
23521 void _initialize_dwarf2_read (void);
23524 _initialize_dwarf2_read (void)
23526 struct cmd_list_element
*c
;
23528 dwarf2_objfile_data_key
23529 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
23531 add_prefix_cmd ("dwarf", class_maintenance
, set_dwarf_cmd
, _("\
23532 Set DWARF specific variables.\n\
23533 Configure DWARF variables such as the cache size"),
23534 &set_dwarf_cmdlist
, "maintenance set dwarf ",
23535 0/*allow-unknown*/, &maintenance_set_cmdlist
);
23537 add_prefix_cmd ("dwarf", class_maintenance
, show_dwarf_cmd
, _("\
23538 Show DWARF specific variables\n\
23539 Show DWARF variables such as the cache size"),
23540 &show_dwarf_cmdlist
, "maintenance show dwarf ",
23541 0/*allow-unknown*/, &maintenance_show_cmdlist
);
23543 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
23544 &dwarf_max_cache_age
, _("\
23545 Set the upper bound on the age of cached DWARF compilation units."), _("\
23546 Show the upper bound on the age of cached DWARF compilation units."), _("\
23547 A higher limit means that cached compilation units will be stored\n\
23548 in memory longer, and more total memory will be used. Zero disables\n\
23549 caching, which can slow down startup."),
23551 show_dwarf_max_cache_age
,
23552 &set_dwarf_cmdlist
,
23553 &show_dwarf_cmdlist
);
23555 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
23556 &dwarf_always_disassemble
, _("\
23557 Set whether `info address' always disassembles DWARF expressions."), _("\
23558 Show whether `info address' always disassembles DWARF expressions."), _("\
23559 When enabled, DWARF expressions are always printed in an assembly-like\n\
23560 syntax. When disabled, expressions will be printed in a more\n\
23561 conversational style, when possible."),
23563 show_dwarf_always_disassemble
,
23564 &set_dwarf_cmdlist
,
23565 &show_dwarf_cmdlist
);
23567 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
23568 Set debugging of the DWARF reader."), _("\
23569 Show debugging of the DWARF reader."), _("\
23570 When enabled (non-zero), debugging messages are printed during DWARF\n\
23571 reading and symtab expansion. A value of 1 (one) provides basic\n\
23572 information. A value greater than 1 provides more verbose information."),
23575 &setdebuglist
, &showdebuglist
);
23577 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
23578 Set debugging of the DWARF DIE reader."), _("\
23579 Show debugging of the DWARF DIE reader."), _("\
23580 When enabled (non-zero), DIEs are dumped after they are read in.\n\
23581 The value is the maximum depth to print."),
23584 &setdebuglist
, &showdebuglist
);
23586 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
23587 Set debugging of the dwarf line reader."), _("\
23588 Show debugging of the dwarf line reader."), _("\
23589 When enabled (non-zero), line number entries are dumped as they are read in.\n\
23590 A value of 1 (one) provides basic information.\n\
23591 A value greater than 1 provides more verbose information."),
23594 &setdebuglist
, &showdebuglist
);
23596 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
23597 Set cross-checking of \"physname\" code against demangler."), _("\
23598 Show cross-checking of \"physname\" code against demangler."), _("\
23599 When enabled, GDB's internal \"physname\" code is checked against\n\
23601 NULL
, show_check_physname
,
23602 &setdebuglist
, &showdebuglist
);
23604 add_setshow_boolean_cmd ("use-deprecated-index-sections",
23605 no_class
, &use_deprecated_index_sections
, _("\
23606 Set whether to use deprecated gdb_index sections."), _("\
23607 Show whether to use deprecated gdb_index sections."), _("\
23608 When enabled, deprecated .gdb_index sections are used anyway.\n\
23609 Normally they are ignored either because of a missing feature or\n\
23610 performance issue.\n\
23611 Warning: This option must be enabled before gdb reads the file."),
23614 &setlist
, &showlist
);
23616 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
23618 Save a gdb-index file.\n\
23619 Usage: save gdb-index DIRECTORY"),
23621 set_cmd_completer (c
, filename_completer
);
23623 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23624 &dwarf2_locexpr_funcs
);
23625 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23626 &dwarf2_loclist_funcs
);
23628 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23629 &dwarf2_block_frame_base_locexpr_funcs
);
23630 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23631 &dwarf2_block_frame_base_loclist_funcs
);