1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994-2017 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"
58 #include "completer.h"
63 #include "gdbcore.h" /* for gnutarget */
64 #include "gdb/gdb-index.h"
69 #include "filestuff.h"
71 #include "namespace.h"
72 #include "common/gdb_unlinker.h"
75 #include <sys/types.h>
78 typedef struct symbol
*symbolp
;
81 /* When == 1, print basic high level tracing messages.
82 When > 1, be more verbose.
83 This is in contrast to the low level DIE reading of dwarf_die_debug. */
84 static unsigned int dwarf_read_debug
= 0;
86 /* When non-zero, dump DIEs after they are read in. */
87 static unsigned int dwarf_die_debug
= 0;
89 /* When non-zero, dump line number entries as they are read in. */
90 static unsigned int dwarf_line_debug
= 0;
92 /* When non-zero, cross-check physname against demangler. */
93 static int check_physname
= 0;
95 /* When non-zero, do not reject deprecated .gdb_index sections. */
96 static int use_deprecated_index_sections
= 0;
98 static const struct objfile_data
*dwarf2_objfile_data_key
;
100 /* The "aclass" indices for various kinds of computed DWARF symbols. */
102 static int dwarf2_locexpr_index
;
103 static int dwarf2_loclist_index
;
104 static int dwarf2_locexpr_block_index
;
105 static int dwarf2_loclist_block_index
;
107 /* A descriptor for dwarf sections.
109 S.ASECTION, SIZE are typically initialized when the objfile is first
110 scanned. BUFFER, READIN are filled in later when the section is read.
111 If the section contained compressed data then SIZE is updated to record
112 the uncompressed size of the section.
114 DWP file format V2 introduces a wrinkle that is easiest to handle by
115 creating the concept of virtual sections contained within a real section.
116 In DWP V2 the sections of the input DWO files are concatenated together
117 into one section, but section offsets are kept relative to the original
119 If this is a virtual dwp-v2 section, S.CONTAINING_SECTION is a backlink to
120 the real section this "virtual" section is contained in, and BUFFER,SIZE
121 describe the virtual section. */
123 struct dwarf2_section_info
127 /* If this is a real section, the bfd section. */
129 /* If this is a virtual section, pointer to the containing ("real")
131 struct dwarf2_section_info
*containing_section
;
133 /* Pointer to section data, only valid if readin. */
134 const gdb_byte
*buffer
;
135 /* The size of the section, real or virtual. */
137 /* If this is a virtual section, the offset in the real section.
138 Only valid if is_virtual. */
139 bfd_size_type virtual_offset
;
140 /* True if we have tried to read this section. */
142 /* True if this is a virtual section, False otherwise.
143 This specifies which of s.section and s.containing_section to use. */
147 typedef struct dwarf2_section_info dwarf2_section_info_def
;
148 DEF_VEC_O (dwarf2_section_info_def
);
150 /* All offsets in the index are of this type. It must be
151 architecture-independent. */
152 typedef uint32_t offset_type
;
154 DEF_VEC_I (offset_type
);
156 /* Ensure only legit values are used. */
157 #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \
159 gdb_assert ((unsigned int) (value) <= 1); \
160 GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \
163 /* Ensure only legit values are used. */
164 #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \
166 gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \
167 && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \
168 GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \
171 /* Ensure we don't use more than the alloted nuber of bits for the CU. */
172 #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \
174 gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \
175 GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \
178 /* A description of the mapped index. The file format is described in
179 a comment by the code that writes the index. */
182 /* Index data format version. */
185 /* The total length of the buffer. */
188 /* A pointer to the address table data. */
189 const gdb_byte
*address_table
;
191 /* Size of the address table data in bytes. */
192 offset_type address_table_size
;
194 /* The symbol table, implemented as a hash table. */
195 const offset_type
*symbol_table
;
197 /* Size in slots, each slot is 2 offset_types. */
198 offset_type symbol_table_slots
;
200 /* A pointer to the constant pool. */
201 const char *constant_pool
;
204 typedef struct dwarf2_per_cu_data
*dwarf2_per_cu_ptr
;
205 DEF_VEC_P (dwarf2_per_cu_ptr
);
209 int nr_uniq_abbrev_tables
;
211 int nr_symtab_sharers
;
212 int nr_stmt_less_type_units
;
213 int nr_all_type_units_reallocs
;
216 /* Collection of data recorded per objfile.
217 This hangs off of dwarf2_objfile_data_key. */
219 struct dwarf2_per_objfile
221 struct dwarf2_section_info info
;
222 struct dwarf2_section_info abbrev
;
223 struct dwarf2_section_info line
;
224 struct dwarf2_section_info loc
;
225 struct dwarf2_section_info macinfo
;
226 struct dwarf2_section_info macro
;
227 struct dwarf2_section_info str
;
228 struct dwarf2_section_info ranges
;
229 struct dwarf2_section_info addr
;
230 struct dwarf2_section_info frame
;
231 struct dwarf2_section_info eh_frame
;
232 struct dwarf2_section_info gdb_index
;
234 VEC (dwarf2_section_info_def
) *types
;
237 struct objfile
*objfile
;
239 /* Table of all the compilation units. This is used to locate
240 the target compilation unit of a particular reference. */
241 struct dwarf2_per_cu_data
**all_comp_units
;
243 /* The number of compilation units in ALL_COMP_UNITS. */
246 /* The number of .debug_types-related CUs. */
249 /* The number of elements allocated in all_type_units.
250 If there are skeleton-less TUs, we add them to all_type_units lazily. */
251 int n_allocated_type_units
;
253 /* The .debug_types-related CUs (TUs).
254 This is stored in malloc space because we may realloc it. */
255 struct signatured_type
**all_type_units
;
257 /* Table of struct type_unit_group objects.
258 The hash key is the DW_AT_stmt_list value. */
259 htab_t type_unit_groups
;
261 /* A table mapping .debug_types signatures to its signatured_type entry.
262 This is NULL if the .debug_types section hasn't been read in yet. */
263 htab_t signatured_types
;
265 /* Type unit statistics, to see how well the scaling improvements
267 struct tu_stats tu_stats
;
269 /* A chain of compilation units that are currently read in, so that
270 they can be freed later. */
271 struct dwarf2_per_cu_data
*read_in_chain
;
273 /* A table mapping DW_AT_dwo_name values to struct dwo_file objects.
274 This is NULL if the table hasn't been allocated yet. */
277 /* Non-zero if we've check for whether there is a DWP file. */
280 /* The DWP file if there is one, or NULL. */
281 struct dwp_file
*dwp_file
;
283 /* The shared '.dwz' file, if one exists. This is used when the
284 original data was compressed using 'dwz -m'. */
285 struct dwz_file
*dwz_file
;
287 /* A flag indicating wether this objfile has a section loaded at a
289 int has_section_at_zero
;
291 /* True if we are using the mapped index,
292 or we are faking it for OBJF_READNOW's sake. */
293 unsigned char using_index
;
295 /* The mapped index, or NULL if .gdb_index is missing or not being used. */
296 struct mapped_index
*index_table
;
298 /* When using index_table, this keeps track of all quick_file_names entries.
299 TUs typically share line table entries with a CU, so we maintain a
300 separate table of all line table entries to support the sharing.
301 Note that while there can be way more TUs than CUs, we've already
302 sorted all the TUs into "type unit groups", grouped by their
303 DW_AT_stmt_list value. Therefore the only sharing done here is with a
304 CU and its associated TU group if there is one. */
305 htab_t quick_file_names_table
;
307 /* Set during partial symbol reading, to prevent queueing of full
309 int reading_partial_symbols
;
311 /* Table mapping type DIEs to their struct type *.
312 This is NULL if not allocated yet.
313 The mapping is done via (CU/TU + DIE offset) -> type. */
314 htab_t die_type_hash
;
316 /* The CUs we recently read. */
317 VEC (dwarf2_per_cu_ptr
) *just_read_cus
;
319 /* Table containing line_header indexed by offset and offset_in_dwz. */
320 htab_t line_header_hash
;
323 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
325 /* Default names of the debugging sections. */
327 /* Note that if the debugging section has been compressed, it might
328 have a name like .zdebug_info. */
330 static const struct dwarf2_debug_sections dwarf2_elf_names
=
332 { ".debug_info", ".zdebug_info" },
333 { ".debug_abbrev", ".zdebug_abbrev" },
334 { ".debug_line", ".zdebug_line" },
335 { ".debug_loc", ".zdebug_loc" },
336 { ".debug_macinfo", ".zdebug_macinfo" },
337 { ".debug_macro", ".zdebug_macro" },
338 { ".debug_str", ".zdebug_str" },
339 { ".debug_ranges", ".zdebug_ranges" },
340 { ".debug_types", ".zdebug_types" },
341 { ".debug_addr", ".zdebug_addr" },
342 { ".debug_frame", ".zdebug_frame" },
343 { ".eh_frame", NULL
},
344 { ".gdb_index", ".zgdb_index" },
348 /* List of DWO/DWP sections. */
350 static const struct dwop_section_names
352 struct dwarf2_section_names abbrev_dwo
;
353 struct dwarf2_section_names info_dwo
;
354 struct dwarf2_section_names line_dwo
;
355 struct dwarf2_section_names loc_dwo
;
356 struct dwarf2_section_names macinfo_dwo
;
357 struct dwarf2_section_names macro_dwo
;
358 struct dwarf2_section_names str_dwo
;
359 struct dwarf2_section_names str_offsets_dwo
;
360 struct dwarf2_section_names types_dwo
;
361 struct dwarf2_section_names cu_index
;
362 struct dwarf2_section_names tu_index
;
366 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
367 { ".debug_info.dwo", ".zdebug_info.dwo" },
368 { ".debug_line.dwo", ".zdebug_line.dwo" },
369 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
370 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
371 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
372 { ".debug_str.dwo", ".zdebug_str.dwo" },
373 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
374 { ".debug_types.dwo", ".zdebug_types.dwo" },
375 { ".debug_cu_index", ".zdebug_cu_index" },
376 { ".debug_tu_index", ".zdebug_tu_index" },
379 /* local data types */
381 /* The data in a compilation unit header, after target2host
382 translation, looks like this. */
383 struct comp_unit_head
387 unsigned char addr_size
;
388 unsigned char signed_addr_p
;
389 sect_offset abbrev_offset
;
391 /* Size of file offsets; either 4 or 8. */
392 unsigned int offset_size
;
394 /* Size of the length field; either 4 or 12. */
395 unsigned int initial_length_size
;
397 /* Offset to the first byte of this compilation unit header in the
398 .debug_info section, for resolving relative reference dies. */
401 /* Offset to first die in this cu from the start of the cu.
402 This will be the first byte following the compilation unit header. */
403 cu_offset first_die_offset
;
406 /* Type used for delaying computation of method physnames.
407 See comments for compute_delayed_physnames. */
408 struct delayed_method_info
410 /* The type to which the method is attached, i.e., its parent class. */
413 /* The index of the method in the type's function fieldlists. */
416 /* The index of the method in the fieldlist. */
419 /* The name of the DIE. */
422 /* The DIE associated with this method. */
423 struct die_info
*die
;
426 typedef struct delayed_method_info delayed_method_info
;
427 DEF_VEC_O (delayed_method_info
);
429 /* Internal state when decoding a particular compilation unit. */
432 /* The objfile containing this compilation unit. */
433 struct objfile
*objfile
;
435 /* The header of the compilation unit. */
436 struct comp_unit_head header
;
438 /* Base address of this compilation unit. */
439 CORE_ADDR base_address
;
441 /* Non-zero if base_address has been set. */
444 /* The language we are debugging. */
445 enum language language
;
446 const struct language_defn
*language_defn
;
448 const char *producer
;
450 /* The generic symbol table building routines have separate lists for
451 file scope symbols and all all other scopes (local scopes). So
452 we need to select the right one to pass to add_symbol_to_list().
453 We do it by keeping a pointer to the correct list in list_in_scope.
455 FIXME: The original dwarf code just treated the file scope as the
456 first local scope, and all other local scopes as nested local
457 scopes, and worked fine. Check to see if we really need to
458 distinguish these in buildsym.c. */
459 struct pending
**list_in_scope
;
461 /* The abbrev table for this CU.
462 Normally this points to the abbrev table in the objfile.
463 But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */
464 struct abbrev_table
*abbrev_table
;
466 /* Hash table holding all the loaded partial DIEs
467 with partial_die->offset.SECT_OFF as hash. */
470 /* Storage for things with the same lifetime as this read-in compilation
471 unit, including partial DIEs. */
472 struct obstack comp_unit_obstack
;
474 /* When multiple dwarf2_cu structures are living in memory, this field
475 chains them all together, so that they can be released efficiently.
476 We will probably also want a generation counter so that most-recently-used
477 compilation units are cached... */
478 struct dwarf2_per_cu_data
*read_in_chain
;
480 /* Backlink to our per_cu entry. */
481 struct dwarf2_per_cu_data
*per_cu
;
483 /* How many compilation units ago was this CU last referenced? */
486 /* A hash table of DIE cu_offset for following references with
487 die_info->offset.sect_off as hash. */
490 /* Full DIEs if read in. */
491 struct die_info
*dies
;
493 /* A set of pointers to dwarf2_per_cu_data objects for compilation
494 units referenced by this one. Only set during full symbol processing;
495 partial symbol tables do not have dependencies. */
498 /* Header data from the line table, during full symbol processing. */
499 struct line_header
*line_header
;
501 /* A list of methods which need to have physnames computed
502 after all type information has been read. */
503 VEC (delayed_method_info
) *method_list
;
505 /* To be copied to symtab->call_site_htab. */
506 htab_t call_site_htab
;
508 /* Non-NULL if this CU came from a DWO file.
509 There is an invariant here that is important to remember:
510 Except for attributes copied from the top level DIE in the "main"
511 (or "stub") file in preparation for reading the DWO file
512 (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
513 Either there isn't a DWO file (in which case this is NULL and the point
514 is moot), or there is and either we're not going to read it (in which
515 case this is NULL) or there is and we are reading it (in which case this
517 struct dwo_unit
*dwo_unit
;
519 /* The DW_AT_addr_base attribute if present, zero otherwise
520 (zero is a valid value though).
521 Note this value comes from the Fission stub CU/TU's DIE. */
524 /* The DW_AT_ranges_base attribute if present, zero otherwise
525 (zero is a valid value though).
526 Note this value comes from the Fission stub CU/TU's DIE.
527 Also note that the value is zero in the non-DWO case so this value can
528 be used without needing to know whether DWO files are in use or not.
529 N.B. This does not apply to DW_AT_ranges appearing in
530 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
531 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
532 DW_AT_ranges_base *would* have to be applied, and we'd have to care
533 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
534 ULONGEST ranges_base
;
536 /* Mark used when releasing cached dies. */
537 unsigned int mark
: 1;
539 /* This CU references .debug_loc. See the symtab->locations_valid field.
540 This test is imperfect as there may exist optimized debug code not using
541 any location list and still facing inlining issues if handled as
542 unoptimized code. For a future better test see GCC PR other/32998. */
543 unsigned int has_loclist
: 1;
545 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set
546 if all the producer_is_* fields are valid. This information is cached
547 because profiling CU expansion showed excessive time spent in
548 producer_is_gxx_lt_4_6. */
549 unsigned int checked_producer
: 1;
550 unsigned int producer_is_gxx_lt_4_6
: 1;
551 unsigned int producer_is_gcc_lt_4_3
: 1;
552 unsigned int producer_is_icc
: 1;
554 /* When set, the file that we're processing is known to have
555 debugging info for C++ namespaces. GCC 3.3.x did not produce
556 this information, but later versions do. */
558 unsigned int processing_has_namespace_info
: 1;
561 /* Persistent data held for a compilation unit, even when not
562 processing it. We put a pointer to this structure in the
563 read_symtab_private field of the psymtab. */
565 struct dwarf2_per_cu_data
567 /* The start offset and length of this compilation unit.
568 NOTE: Unlike comp_unit_head.length, this length includes
570 If the DIE refers to a DWO file, this is always of the original die,
575 /* Flag indicating this compilation unit will be read in before
576 any of the current compilation units are processed. */
577 unsigned int queued
: 1;
579 /* This flag will be set when reading partial DIEs if we need to load
580 absolutely all DIEs for this compilation unit, instead of just the ones
581 we think are interesting. It gets set if we look for a DIE in the
582 hash table and don't find it. */
583 unsigned int load_all_dies
: 1;
585 /* Non-zero if this CU is from .debug_types.
586 Struct dwarf2_per_cu_data is contained in struct signatured_type iff
588 unsigned int is_debug_types
: 1;
590 /* Non-zero if this CU is from the .dwz file. */
591 unsigned int is_dwz
: 1;
593 /* Non-zero if reading a TU directly from a DWO file, bypassing the stub.
594 This flag is only valid if is_debug_types is true.
595 We can't read a CU directly from a DWO file: There are required
596 attributes in the stub. */
597 unsigned int reading_dwo_directly
: 1;
599 /* Non-zero if the TU has been read.
600 This is used to assist the "Stay in DWO Optimization" for Fission:
601 When reading a DWO, it's faster to read TUs from the DWO instead of
602 fetching them from random other DWOs (due to comdat folding).
603 If the TU has already been read, the optimization is unnecessary
604 (and unwise - we don't want to change where gdb thinks the TU lives
606 This flag is only valid if is_debug_types is true. */
607 unsigned int tu_read
: 1;
609 /* The section this CU/TU lives in.
610 If the DIE refers to a DWO file, this is always the original die,
612 struct dwarf2_section_info
*section
;
614 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
615 of the CU cache it gets reset to NULL again. This is left as NULL for
616 dummy CUs (a CU header, but nothing else). */
617 struct dwarf2_cu
*cu
;
619 /* The corresponding objfile.
620 Normally we can get the objfile from dwarf2_per_objfile.
621 However we can enter this file with just a "per_cu" handle. */
622 struct objfile
*objfile
;
624 /* When dwarf2_per_objfile->using_index is true, the 'quick' field
625 is active. Otherwise, the 'psymtab' field is active. */
628 /* The partial symbol table associated with this compilation unit,
629 or NULL for unread partial units. */
630 struct partial_symtab
*psymtab
;
632 /* Data needed by the "quick" functions. */
633 struct dwarf2_per_cu_quick_data
*quick
;
636 /* The CUs we import using DW_TAG_imported_unit. This is filled in
637 while reading psymtabs, used to compute the psymtab dependencies,
638 and then cleared. Then it is filled in again while reading full
639 symbols, and only deleted when the objfile is destroyed.
641 This is also used to work around a difference between the way gold
642 generates .gdb_index version <=7 and the way gdb does. Arguably this
643 is a gold bug. For symbols coming from TUs, gold records in the index
644 the CU that includes the TU instead of the TU itself. This breaks
645 dw2_lookup_symbol: It assumes that if the index says symbol X lives
646 in CU/TU Y, then one need only expand Y and a subsequent lookup in Y
647 will find X. Alas TUs live in their own symtab, so after expanding CU Y
648 we need to look in TU Z to find X. Fortunately, this is akin to
649 DW_TAG_imported_unit, so we just use the same mechanism: For
650 .gdb_index version <=7 this also records the TUs that the CU referred
651 to. Concurrently with this change gdb was modified to emit version 8
652 indices so we only pay a price for gold generated indices.
653 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
654 VEC (dwarf2_per_cu_ptr
) *imported_symtabs
;
657 /* Entry in the signatured_types hash table. */
659 struct signatured_type
661 /* The "per_cu" object of this type.
662 This struct is used iff per_cu.is_debug_types.
663 N.B.: This is the first member so that it's easy to convert pointers
665 struct dwarf2_per_cu_data per_cu
;
667 /* The type's signature. */
670 /* Offset in the TU of the type's DIE, as read from the TU header.
671 If this TU is a DWO stub and the definition lives in a DWO file
672 (specified by DW_AT_GNU_dwo_name), this value is unusable. */
673 cu_offset type_offset_in_tu
;
675 /* Offset in the section of the type's DIE.
676 If the definition lives in a DWO file, this is the offset in the
677 .debug_types.dwo section.
678 The value is zero until the actual value is known.
679 Zero is otherwise not a valid section offset. */
680 sect_offset type_offset_in_section
;
682 /* Type units are grouped by their DW_AT_stmt_list entry so that they
683 can share them. This points to the containing symtab. */
684 struct type_unit_group
*type_unit_group
;
687 The first time we encounter this type we fully read it in and install it
688 in the symbol tables. Subsequent times we only need the type. */
691 /* Containing DWO unit.
692 This field is valid iff per_cu.reading_dwo_directly. */
693 struct dwo_unit
*dwo_unit
;
696 typedef struct signatured_type
*sig_type_ptr
;
697 DEF_VEC_P (sig_type_ptr
);
699 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
700 This includes type_unit_group and quick_file_names. */
702 struct stmt_list_hash
704 /* The DWO unit this table is from or NULL if there is none. */
705 struct dwo_unit
*dwo_unit
;
707 /* Offset in .debug_line or .debug_line.dwo. */
708 sect_offset line_offset
;
711 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
712 an object of this type. */
714 struct type_unit_group
716 /* dwarf2read.c's main "handle" on a TU symtab.
717 To simplify things we create an artificial CU that "includes" all the
718 type units using this stmt_list so that the rest of the code still has
719 a "per_cu" handle on the symtab.
720 This PER_CU is recognized by having no section. */
721 #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL)
722 struct dwarf2_per_cu_data per_cu
;
724 /* The TUs that share this DW_AT_stmt_list entry.
725 This is added to while parsing type units to build partial symtabs,
726 and is deleted afterwards and not used again. */
727 VEC (sig_type_ptr
) *tus
;
729 /* The compunit symtab.
730 Type units in a group needn't all be defined in the same source file,
731 so we create an essentially anonymous symtab as the compunit symtab. */
732 struct compunit_symtab
*compunit_symtab
;
734 /* The data used to construct the hash key. */
735 struct stmt_list_hash hash
;
737 /* The number of symtabs from the line header.
738 The value here must match line_header.num_file_names. */
739 unsigned int num_symtabs
;
741 /* The symbol tables for this TU (obtained from the files listed in
743 WARNING: The order of entries here must match the order of entries
744 in the line header. After the first TU using this type_unit_group, the
745 line header for the subsequent TUs is recreated from this. This is done
746 because we need to use the same symtabs for each TU using the same
747 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
748 there's no guarantee the line header doesn't have duplicate entries. */
749 struct symtab
**symtabs
;
752 /* These sections are what may appear in a (real or virtual) DWO file. */
756 struct dwarf2_section_info abbrev
;
757 struct dwarf2_section_info line
;
758 struct dwarf2_section_info loc
;
759 struct dwarf2_section_info macinfo
;
760 struct dwarf2_section_info macro
;
761 struct dwarf2_section_info str
;
762 struct dwarf2_section_info str_offsets
;
763 /* In the case of a virtual DWO file, these two are unused. */
764 struct dwarf2_section_info info
;
765 VEC (dwarf2_section_info_def
) *types
;
768 /* CUs/TUs in DWP/DWO files. */
772 /* Backlink to the containing struct dwo_file. */
773 struct dwo_file
*dwo_file
;
775 /* The "id" that distinguishes this CU/TU.
776 .debug_info calls this "dwo_id", .debug_types calls this "signature".
777 Since signatures came first, we stick with it for consistency. */
780 /* The section this CU/TU lives in, in the DWO file. */
781 struct dwarf2_section_info
*section
;
783 /* Same as dwarf2_per_cu_data:{offset,length} but in the DWO section. */
787 /* For types, offset in the type's DIE of the type defined by this TU. */
788 cu_offset type_offset_in_tu
;
791 /* include/dwarf2.h defines the DWP section codes.
792 It defines a max value but it doesn't define a min value, which we
793 use for error checking, so provide one. */
795 enum dwp_v2_section_ids
800 /* Data for one DWO file.
802 This includes virtual DWO files (a virtual DWO file is a DWO file as it
803 appears in a DWP file). DWP files don't really have DWO files per se -
804 comdat folding of types "loses" the DWO file they came from, and from
805 a high level view DWP files appear to contain a mass of random types.
806 However, to maintain consistency with the non-DWP case we pretend DWP
807 files contain virtual DWO files, and we assign each TU with one virtual
808 DWO file (generally based on the line and abbrev section offsets -
809 a heuristic that seems to work in practice). */
813 /* The DW_AT_GNU_dwo_name attribute.
814 For virtual DWO files the name is constructed from the section offsets
815 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
816 from related CU+TUs. */
817 const char *dwo_name
;
819 /* The DW_AT_comp_dir attribute. */
820 const char *comp_dir
;
822 /* The bfd, when the file is open. Otherwise this is NULL.
823 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
826 /* The sections that make up this DWO file.
827 Remember that for virtual DWO files in DWP V2, these are virtual
828 sections (for lack of a better name). */
829 struct dwo_sections sections
;
831 /* The CU in the file.
832 We only support one because having more than one requires hacking the
833 dwo_name of each to match, which is highly unlikely to happen.
834 Doing this means all TUs can share comp_dir: We also assume that
835 DW_AT_comp_dir across all TUs in a DWO file will be identical. */
838 /* Table of TUs in the file.
839 Each element is a struct dwo_unit. */
843 /* These sections are what may appear in a DWP file. */
847 /* These are used by both DWP version 1 and 2. */
848 struct dwarf2_section_info str
;
849 struct dwarf2_section_info cu_index
;
850 struct dwarf2_section_info tu_index
;
852 /* These are only used by DWP version 2 files.
853 In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other
854 sections are referenced by section number, and are not recorded here.
855 In DWP version 2 there is at most one copy of all these sections, each
856 section being (effectively) comprised of the concatenation of all of the
857 individual sections that exist in the version 1 format.
858 To keep the code simple we treat each of these concatenated pieces as a
859 section itself (a virtual section?). */
860 struct dwarf2_section_info abbrev
;
861 struct dwarf2_section_info info
;
862 struct dwarf2_section_info line
;
863 struct dwarf2_section_info loc
;
864 struct dwarf2_section_info macinfo
;
865 struct dwarf2_section_info macro
;
866 struct dwarf2_section_info str_offsets
;
867 struct dwarf2_section_info types
;
870 /* These sections are what may appear in a virtual DWO file in DWP version 1.
871 A virtual DWO file is a DWO file as it appears in a DWP file. */
873 struct virtual_v1_dwo_sections
875 struct dwarf2_section_info abbrev
;
876 struct dwarf2_section_info line
;
877 struct dwarf2_section_info loc
;
878 struct dwarf2_section_info macinfo
;
879 struct dwarf2_section_info macro
;
880 struct dwarf2_section_info str_offsets
;
881 /* Each DWP hash table entry records one CU or one TU.
882 That is recorded here, and copied to dwo_unit.section. */
883 struct dwarf2_section_info info_or_types
;
886 /* Similar to virtual_v1_dwo_sections, but for DWP version 2.
887 In version 2, the sections of the DWO files are concatenated together
888 and stored in one section of that name. Thus each ELF section contains
889 several "virtual" sections. */
891 struct virtual_v2_dwo_sections
893 bfd_size_type abbrev_offset
;
894 bfd_size_type abbrev_size
;
896 bfd_size_type line_offset
;
897 bfd_size_type line_size
;
899 bfd_size_type loc_offset
;
900 bfd_size_type loc_size
;
902 bfd_size_type macinfo_offset
;
903 bfd_size_type macinfo_size
;
905 bfd_size_type macro_offset
;
906 bfd_size_type macro_size
;
908 bfd_size_type str_offsets_offset
;
909 bfd_size_type str_offsets_size
;
911 /* Each DWP hash table entry records one CU or one TU.
912 That is recorded here, and copied to dwo_unit.section. */
913 bfd_size_type info_or_types_offset
;
914 bfd_size_type info_or_types_size
;
917 /* Contents of DWP hash tables. */
919 struct dwp_hash_table
921 uint32_t version
, nr_columns
;
922 uint32_t nr_units
, nr_slots
;
923 const gdb_byte
*hash_table
, *unit_table
;
928 const gdb_byte
*indices
;
932 /* This is indexed by column number and gives the id of the section
934 #define MAX_NR_V2_DWO_SECTIONS \
935 (1 /* .debug_info or .debug_types */ \
936 + 1 /* .debug_abbrev */ \
937 + 1 /* .debug_line */ \
938 + 1 /* .debug_loc */ \
939 + 1 /* .debug_str_offsets */ \
940 + 1 /* .debug_macro or .debug_macinfo */)
941 int section_ids
[MAX_NR_V2_DWO_SECTIONS
];
942 const gdb_byte
*offsets
;
943 const gdb_byte
*sizes
;
948 /* Data for one DWP file. */
952 /* Name of the file. */
955 /* File format version. */
961 /* Section info for this file. */
962 struct dwp_sections sections
;
964 /* Table of CUs in the file. */
965 const struct dwp_hash_table
*cus
;
967 /* Table of TUs in the file. */
968 const struct dwp_hash_table
*tus
;
970 /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
974 /* Table to map ELF section numbers to their sections.
975 This is only needed for the DWP V1 file format. */
976 unsigned int num_sections
;
977 asection
**elf_sections
;
980 /* This represents a '.dwz' file. */
984 /* A dwz file can only contain a few sections. */
985 struct dwarf2_section_info abbrev
;
986 struct dwarf2_section_info info
;
987 struct dwarf2_section_info str
;
988 struct dwarf2_section_info line
;
989 struct dwarf2_section_info macro
;
990 struct dwarf2_section_info gdb_index
;
996 /* Struct used to pass misc. parameters to read_die_and_children, et
997 al. which are used for both .debug_info and .debug_types dies.
998 All parameters here are unchanging for the life of the call. This
999 struct exists to abstract away the constant parameters of die reading. */
1001 struct die_reader_specs
1003 /* The bfd of die_section. */
1006 /* The CU of the DIE we are parsing. */
1007 struct dwarf2_cu
*cu
;
1009 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
1010 struct dwo_file
*dwo_file
;
1012 /* The section the die comes from.
1013 This is either .debug_info or .debug_types, or the .dwo variants. */
1014 struct dwarf2_section_info
*die_section
;
1016 /* die_section->buffer. */
1017 const gdb_byte
*buffer
;
1019 /* The end of the buffer. */
1020 const gdb_byte
*buffer_end
;
1022 /* The value of the DW_AT_comp_dir attribute. */
1023 const char *comp_dir
;
1026 /* Type of function passed to init_cutu_and_read_dies, et.al. */
1027 typedef void (die_reader_func_ftype
) (const struct die_reader_specs
*reader
,
1028 const gdb_byte
*info_ptr
,
1029 struct die_info
*comp_unit_die
,
1036 unsigned int dir_index
;
1037 unsigned int mod_time
;
1038 unsigned int length
;
1039 /* Non-zero if referenced by the Line Number Program. */
1041 /* The associated symbol table, if any. */
1042 struct symtab
*symtab
;
1045 /* The line number information for a compilation unit (found in the
1046 .debug_line section) begins with a "statement program header",
1047 which contains the following information. */
1050 /* Offset of line number information in .debug_line section. */
1053 /* OFFSET is for struct dwz_file associated with dwarf2_per_objfile. */
1054 unsigned offset_in_dwz
: 1;
1056 unsigned int total_length
;
1057 unsigned short version
;
1058 unsigned int header_length
;
1059 unsigned char minimum_instruction_length
;
1060 unsigned char maximum_ops_per_instruction
;
1061 unsigned char default_is_stmt
;
1063 unsigned char line_range
;
1064 unsigned char opcode_base
;
1066 /* standard_opcode_lengths[i] is the number of operands for the
1067 standard opcode whose value is i. This means that
1068 standard_opcode_lengths[0] is unused, and the last meaningful
1069 element is standard_opcode_lengths[opcode_base - 1]. */
1070 unsigned char *standard_opcode_lengths
;
1072 /* The include_directories table. NOTE! These strings are not
1073 allocated with xmalloc; instead, they are pointers into
1074 debug_line_buffer. If you try to free them, `free' will get
1076 unsigned int num_include_dirs
, include_dirs_size
;
1077 const char **include_dirs
;
1079 /* The file_names table. NOTE! These strings are not allocated
1080 with xmalloc; instead, they are pointers into debug_line_buffer.
1081 Don't try to free them directly. */
1082 unsigned int num_file_names
, file_names_size
;
1083 struct file_entry
*file_names
;
1085 /* The start and end of the statement program following this
1086 header. These point into dwarf2_per_objfile->line_buffer. */
1087 const gdb_byte
*statement_program_start
, *statement_program_end
;
1090 /* When we construct a partial symbol table entry we only
1091 need this much information. */
1092 struct partial_die_info
1094 /* Offset of this DIE. */
1097 /* DWARF-2 tag for this DIE. */
1098 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1100 /* Assorted flags describing the data found in this DIE. */
1101 unsigned int has_children
: 1;
1102 unsigned int is_external
: 1;
1103 unsigned int is_declaration
: 1;
1104 unsigned int has_type
: 1;
1105 unsigned int has_specification
: 1;
1106 unsigned int has_pc_info
: 1;
1107 unsigned int may_be_inlined
: 1;
1109 /* This DIE has been marked DW_AT_main_subprogram. */
1110 unsigned int main_subprogram
: 1;
1112 /* Flag set if the SCOPE field of this structure has been
1114 unsigned int scope_set
: 1;
1116 /* Flag set if the DIE has a byte_size attribute. */
1117 unsigned int has_byte_size
: 1;
1119 /* Flag set if the DIE has a DW_AT_const_value attribute. */
1120 unsigned int has_const_value
: 1;
1122 /* Flag set if any of the DIE's children are template arguments. */
1123 unsigned int has_template_arguments
: 1;
1125 /* Flag set if fixup_partial_die has been called on this die. */
1126 unsigned int fixup_called
: 1;
1128 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
1129 unsigned int is_dwz
: 1;
1131 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
1132 unsigned int spec_is_dwz
: 1;
1134 /* The name of this DIE. Normally the value of DW_AT_name, but
1135 sometimes a default name for unnamed DIEs. */
1138 /* The linkage name, if present. */
1139 const char *linkage_name
;
1141 /* The scope to prepend to our children. This is generally
1142 allocated on the comp_unit_obstack, so will disappear
1143 when this compilation unit leaves the cache. */
1146 /* Some data associated with the partial DIE. The tag determines
1147 which field is live. */
1150 /* The location description associated with this DIE, if any. */
1151 struct dwarf_block
*locdesc
;
1152 /* The offset of an import, for DW_TAG_imported_unit. */
1156 /* If HAS_PC_INFO, the PC range associated with this DIE. */
1160 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
1161 DW_AT_sibling, if any. */
1162 /* NOTE: This member isn't strictly necessary, read_partial_die could
1163 return DW_AT_sibling values to its caller load_partial_dies. */
1164 const gdb_byte
*sibling
;
1166 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
1167 DW_AT_specification (or DW_AT_abstract_origin or
1168 DW_AT_extension). */
1169 sect_offset spec_offset
;
1171 /* Pointers to this DIE's parent, first child, and next sibling,
1173 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
1176 /* This data structure holds the information of an abbrev. */
1179 unsigned int number
; /* number identifying abbrev */
1180 enum dwarf_tag tag
; /* dwarf tag */
1181 unsigned short has_children
; /* boolean */
1182 unsigned short num_attrs
; /* number of attributes */
1183 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
1184 struct abbrev_info
*next
; /* next in chain */
1189 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1190 ENUM_BITFIELD(dwarf_form
) form
: 16;
1193 /* Size of abbrev_table.abbrev_hash_table. */
1194 #define ABBREV_HASH_SIZE 121
1196 /* Top level data structure to contain an abbreviation table. */
1200 /* Where the abbrev table came from.
1201 This is used as a sanity check when the table is used. */
1204 /* Storage for the abbrev table. */
1205 struct obstack abbrev_obstack
;
1207 /* Hash table of abbrevs.
1208 This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
1209 It could be statically allocated, but the previous code didn't so we
1211 struct abbrev_info
**abbrevs
;
1214 /* Attributes have a name and a value. */
1217 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1218 ENUM_BITFIELD(dwarf_form
) form
: 15;
1220 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
1221 field should be in u.str (existing only for DW_STRING) but it is kept
1222 here for better struct attribute alignment. */
1223 unsigned int string_is_canonical
: 1;
1228 struct dwarf_block
*blk
;
1237 /* This data structure holds a complete die structure. */
1240 /* DWARF-2 tag for this DIE. */
1241 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1243 /* Number of attributes */
1244 unsigned char num_attrs
;
1246 /* True if we're presently building the full type name for the
1247 type derived from this DIE. */
1248 unsigned char building_fullname
: 1;
1250 /* True if this die is in process. PR 16581. */
1251 unsigned char in_process
: 1;
1254 unsigned int abbrev
;
1256 /* Offset in .debug_info or .debug_types section. */
1259 /* The dies in a compilation unit form an n-ary tree. PARENT
1260 points to this die's parent; CHILD points to the first child of
1261 this node; and all the children of a given node are chained
1262 together via their SIBLING fields. */
1263 struct die_info
*child
; /* Its first child, if any. */
1264 struct die_info
*sibling
; /* Its next sibling, if any. */
1265 struct die_info
*parent
; /* Its parent, if any. */
1267 /* An array of attributes, with NUM_ATTRS elements. There may be
1268 zero, but it's not common and zero-sized arrays are not
1269 sufficiently portable C. */
1270 struct attribute attrs
[1];
1273 /* Get at parts of an attribute structure. */
1275 #define DW_STRING(attr) ((attr)->u.str)
1276 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
1277 #define DW_UNSND(attr) ((attr)->u.unsnd)
1278 #define DW_BLOCK(attr) ((attr)->u.blk)
1279 #define DW_SND(attr) ((attr)->u.snd)
1280 #define DW_ADDR(attr) ((attr)->u.addr)
1281 #define DW_SIGNATURE(attr) ((attr)->u.signature)
1283 /* Blocks are a bunch of untyped bytes. */
1288 /* Valid only if SIZE is not zero. */
1289 const gdb_byte
*data
;
1292 #ifndef ATTR_ALLOC_CHUNK
1293 #define ATTR_ALLOC_CHUNK 4
1296 /* Allocate fields for structs, unions and enums in this size. */
1297 #ifndef DW_FIELD_ALLOC_CHUNK
1298 #define DW_FIELD_ALLOC_CHUNK 4
1301 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1302 but this would require a corresponding change in unpack_field_as_long
1304 static int bits_per_byte
= 8;
1308 struct nextfield
*next
;
1316 struct nextfnfield
*next
;
1317 struct fn_field fnfield
;
1324 struct nextfnfield
*head
;
1327 struct typedef_field_list
1329 struct typedef_field field
;
1330 struct typedef_field_list
*next
;
1333 /* The routines that read and process dies for a C struct or C++ class
1334 pass lists of data member fields and lists of member function fields
1335 in an instance of a field_info structure, as defined below. */
1338 /* List of data member and baseclasses fields. */
1339 struct nextfield
*fields
, *baseclasses
;
1341 /* Number of fields (including baseclasses). */
1344 /* Number of baseclasses. */
1347 /* Set if the accesibility of one of the fields is not public. */
1348 int non_public_fields
;
1350 /* Member function fields array, entries are allocated in the order they
1351 are encountered in the object file. */
1352 struct nextfnfield
*fnfields
;
1354 /* Member function fieldlist array, contains name of possibly overloaded
1355 member function, number of overloaded member functions and a pointer
1356 to the head of the member function field chain. */
1357 struct fnfieldlist
*fnfieldlists
;
1359 /* Number of entries in the fnfieldlists array. */
1362 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1363 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1364 struct typedef_field_list
*typedef_field_list
;
1365 unsigned typedef_field_list_count
;
1368 /* One item on the queue of compilation units to read in full symbols
1370 struct dwarf2_queue_item
1372 struct dwarf2_per_cu_data
*per_cu
;
1373 enum language pretend_language
;
1374 struct dwarf2_queue_item
*next
;
1377 /* The current queue. */
1378 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
1380 /* Loaded secondary compilation units are kept in memory until they
1381 have not been referenced for the processing of this many
1382 compilation units. Set this to zero to disable caching. Cache
1383 sizes of up to at least twenty will improve startup time for
1384 typical inter-CU-reference binaries, at an obvious memory cost. */
1385 static int dwarf_max_cache_age
= 5;
1387 show_dwarf_max_cache_age (struct ui_file
*file
, int from_tty
,
1388 struct cmd_list_element
*c
, const char *value
)
1390 fprintf_filtered (file
, _("The upper bound on the age of cached "
1391 "DWARF compilation units is %s.\n"),
1395 /* local function prototypes */
1397 static const char *get_section_name (const struct dwarf2_section_info
*);
1399 static const char *get_section_file_name (const struct dwarf2_section_info
*);
1401 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
1403 static void dwarf2_find_base_address (struct die_info
*die
,
1404 struct dwarf2_cu
*cu
);
1406 static struct partial_symtab
*create_partial_symtab
1407 (struct dwarf2_per_cu_data
*per_cu
, const char *name
);
1409 static void dwarf2_build_psymtabs_hard (struct objfile
*);
1411 static void scan_partial_symbols (struct partial_die_info
*,
1412 CORE_ADDR
*, CORE_ADDR
*,
1413 int, struct dwarf2_cu
*);
1415 static void add_partial_symbol (struct partial_die_info
*,
1416 struct dwarf2_cu
*);
1418 static void add_partial_namespace (struct partial_die_info
*pdi
,
1419 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1420 int set_addrmap
, struct dwarf2_cu
*cu
);
1422 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1423 CORE_ADDR
*highpc
, int set_addrmap
,
1424 struct dwarf2_cu
*cu
);
1426 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1427 struct dwarf2_cu
*cu
);
1429 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1430 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1431 int need_pc
, struct dwarf2_cu
*cu
);
1433 static void dwarf2_read_symtab (struct partial_symtab
*,
1436 static void psymtab_to_symtab_1 (struct partial_symtab
*);
1438 static struct abbrev_info
*abbrev_table_lookup_abbrev
1439 (const struct abbrev_table
*, unsigned int);
1441 static struct abbrev_table
*abbrev_table_read_table
1442 (struct dwarf2_section_info
*, sect_offset
);
1444 static void abbrev_table_free (struct abbrev_table
*);
1446 static void abbrev_table_free_cleanup (void *);
1448 static void dwarf2_read_abbrevs (struct dwarf2_cu
*,
1449 struct dwarf2_section_info
*);
1451 static void dwarf2_free_abbrev_table (void *);
1453 static unsigned int peek_abbrev_code (bfd
*, const gdb_byte
*);
1455 static struct partial_die_info
*load_partial_dies
1456 (const struct die_reader_specs
*, const gdb_byte
*, int);
1458 static const gdb_byte
*read_partial_die (const struct die_reader_specs
*,
1459 struct partial_die_info
*,
1460 struct abbrev_info
*,
1464 static struct partial_die_info
*find_partial_die (sect_offset
, int,
1465 struct dwarf2_cu
*);
1467 static void fixup_partial_die (struct partial_die_info
*,
1468 struct dwarf2_cu
*);
1470 static const gdb_byte
*read_attribute (const struct die_reader_specs
*,
1471 struct attribute
*, struct attr_abbrev
*,
1474 static unsigned int read_1_byte (bfd
*, const gdb_byte
*);
1476 static int read_1_signed_byte (bfd
*, const gdb_byte
*);
1478 static unsigned int read_2_bytes (bfd
*, const gdb_byte
*);
1480 static unsigned int read_4_bytes (bfd
*, const gdb_byte
*);
1482 static ULONGEST
read_8_bytes (bfd
*, const gdb_byte
*);
1484 static CORE_ADDR
read_address (bfd
*, const gdb_byte
*ptr
, struct dwarf2_cu
*,
1487 static LONGEST
read_initial_length (bfd
*, const gdb_byte
*, unsigned int *);
1489 static LONGEST read_checked_initial_length_and_offset
1490 (bfd
*, const gdb_byte
*, const struct comp_unit_head
*,
1491 unsigned int *, unsigned int *);
1493 static LONGEST
read_offset (bfd
*, const gdb_byte
*,
1494 const struct comp_unit_head
*,
1497 static LONGEST
read_offset_1 (bfd
*, const gdb_byte
*, unsigned int);
1499 static sect_offset
read_abbrev_offset (struct dwarf2_section_info
*,
1502 static const gdb_byte
*read_n_bytes (bfd
*, const gdb_byte
*, unsigned int);
1504 static const char *read_direct_string (bfd
*, const gdb_byte
*, unsigned int *);
1506 static const char *read_indirect_string (bfd
*, const gdb_byte
*,
1507 const struct comp_unit_head
*,
1510 static const char *read_indirect_string_from_dwz (struct dwz_file
*, LONGEST
);
1512 static ULONGEST
read_unsigned_leb128 (bfd
*, const gdb_byte
*, unsigned int *);
1514 static LONGEST
read_signed_leb128 (bfd
*, const gdb_byte
*, unsigned int *);
1516 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*,
1520 static const char *read_str_index (const struct die_reader_specs
*reader
,
1521 ULONGEST str_index
);
1523 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1525 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1526 struct dwarf2_cu
*);
1528 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
1531 static const char *dwarf2_string_attr (struct die_info
*die
, unsigned int name
,
1532 struct dwarf2_cu
*cu
);
1534 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1535 struct dwarf2_cu
*cu
);
1537 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1539 static struct die_info
*die_specification (struct die_info
*die
,
1540 struct dwarf2_cu
**);
1542 static void free_line_header (struct line_header
*lh
);
1544 static struct line_header
*dwarf_decode_line_header (unsigned int offset
,
1545 struct dwarf2_cu
*cu
);
1547 static void dwarf_decode_lines (struct line_header
*, const char *,
1548 struct dwarf2_cu
*, struct partial_symtab
*,
1549 CORE_ADDR
, int decode_mapping
);
1551 static void dwarf2_start_subfile (const char *, const char *);
1553 static struct compunit_symtab
*dwarf2_start_symtab (struct dwarf2_cu
*,
1554 const char *, const char *,
1557 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1558 struct dwarf2_cu
*);
1560 static struct symbol
*new_symbol_full (struct die_info
*, struct type
*,
1561 struct dwarf2_cu
*, struct symbol
*);
1563 static void dwarf2_const_value (const struct attribute
*, struct symbol
*,
1564 struct dwarf2_cu
*);
1566 static void dwarf2_const_value_attr (const struct attribute
*attr
,
1569 struct obstack
*obstack
,
1570 struct dwarf2_cu
*cu
, LONGEST
*value
,
1571 const gdb_byte
**bytes
,
1572 struct dwarf2_locexpr_baton
**baton
);
1574 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1576 static int need_gnat_info (struct dwarf2_cu
*);
1578 static struct type
*die_descriptive_type (struct die_info
*,
1579 struct dwarf2_cu
*);
1581 static void set_descriptive_type (struct type
*, struct die_info
*,
1582 struct dwarf2_cu
*);
1584 static struct type
*die_containing_type (struct die_info
*,
1585 struct dwarf2_cu
*);
1587 static struct type
*lookup_die_type (struct die_info
*, const struct attribute
*,
1588 struct dwarf2_cu
*);
1590 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1592 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1594 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1596 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1597 const char *suffix
, int physname
,
1598 struct dwarf2_cu
*cu
);
1600 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1602 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1604 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1606 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1608 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1610 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1611 struct dwarf2_cu
*, struct partial_symtab
*);
1613 /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return
1614 values. Keep the items ordered with increasing constraints compliance. */
1617 /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */
1618 PC_BOUNDS_NOT_PRESENT
,
1620 /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges
1621 were present but they do not form a valid range of PC addresses. */
1624 /* Discontiguous range was found - that is DW_AT_ranges was found. */
1627 /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */
1631 static enum pc_bounds_kind
dwarf2_get_pc_bounds (struct die_info
*,
1632 CORE_ADDR
*, CORE_ADDR
*,
1634 struct partial_symtab
*);
1636 static void get_scope_pc_bounds (struct die_info
*,
1637 CORE_ADDR
*, CORE_ADDR
*,
1638 struct dwarf2_cu
*);
1640 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1641 CORE_ADDR
, struct dwarf2_cu
*);
1643 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1644 struct dwarf2_cu
*);
1646 static void dwarf2_attach_fields_to_type (struct field_info
*,
1647 struct type
*, struct dwarf2_cu
*);
1649 static void dwarf2_add_member_fn (struct field_info
*,
1650 struct die_info
*, struct type
*,
1651 struct dwarf2_cu
*);
1653 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1655 struct dwarf2_cu
*);
1657 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1659 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1661 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1663 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1665 static struct using_direct
**using_directives (enum language
);
1667 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1669 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1671 static struct type
*read_module_type (struct die_info
*die
,
1672 struct dwarf2_cu
*cu
);
1674 static const char *namespace_name (struct die_info
*die
,
1675 int *is_anonymous
, struct dwarf2_cu
*);
1677 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1679 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1681 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1682 struct dwarf2_cu
*);
1684 static struct die_info
*read_die_and_siblings_1
1685 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1688 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1689 const gdb_byte
*info_ptr
,
1690 const gdb_byte
**new_info_ptr
,
1691 struct die_info
*parent
);
1693 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1694 struct die_info
**, const gdb_byte
*,
1697 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1698 struct die_info
**, const gdb_byte
*,
1701 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1703 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1706 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1708 static const char *dwarf2_full_name (const char *name
,
1709 struct die_info
*die
,
1710 struct dwarf2_cu
*cu
);
1712 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1713 struct dwarf2_cu
*cu
);
1715 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1716 struct dwarf2_cu
**);
1718 static const char *dwarf_tag_name (unsigned int);
1720 static const char *dwarf_attr_name (unsigned int);
1722 static const char *dwarf_form_name (unsigned int);
1724 static char *dwarf_bool_name (unsigned int);
1726 static const char *dwarf_type_encoding_name (unsigned int);
1728 static struct die_info
*sibling_die (struct die_info
*);
1730 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1732 static void dump_die_for_error (struct die_info
*);
1734 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1737 /*static*/ void dump_die (struct die_info
*, int max_level
);
1739 static void store_in_ref_table (struct die_info
*,
1740 struct dwarf2_cu
*);
1742 static sect_offset
dwarf2_get_ref_die_offset (const struct attribute
*);
1744 static LONGEST
dwarf2_get_attr_constant_value (const struct attribute
*, int);
1746 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1747 const struct attribute
*,
1748 struct dwarf2_cu
**);
1750 static struct die_info
*follow_die_ref (struct die_info
*,
1751 const struct attribute
*,
1752 struct dwarf2_cu
**);
1754 static struct die_info
*follow_die_sig (struct die_info
*,
1755 const struct attribute
*,
1756 struct dwarf2_cu
**);
1758 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1759 struct dwarf2_cu
*);
1761 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1762 const struct attribute
*,
1763 struct dwarf2_cu
*);
1765 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1767 static void read_signatured_type (struct signatured_type
*);
1769 static int attr_to_dynamic_prop (const struct attribute
*attr
,
1770 struct die_info
*die
, struct dwarf2_cu
*cu
,
1771 struct dynamic_prop
*prop
);
1773 /* memory allocation interface */
1775 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1777 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1779 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1781 static int attr_form_is_block (const struct attribute
*);
1783 static int attr_form_is_section_offset (const struct attribute
*);
1785 static int attr_form_is_constant (const struct attribute
*);
1787 static int attr_form_is_ref (const struct attribute
*);
1789 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1790 struct dwarf2_loclist_baton
*baton
,
1791 const struct attribute
*attr
);
1793 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1795 struct dwarf2_cu
*cu
,
1798 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1799 const gdb_byte
*info_ptr
,
1800 struct abbrev_info
*abbrev
);
1802 static void free_stack_comp_unit (void *);
1804 static hashval_t
partial_die_hash (const void *item
);
1806 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1808 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1809 (sect_offset offset
, unsigned int offset_in_dwz
, struct objfile
*objfile
);
1811 static void init_one_comp_unit (struct dwarf2_cu
*cu
,
1812 struct dwarf2_per_cu_data
*per_cu
);
1814 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1815 struct die_info
*comp_unit_die
,
1816 enum language pretend_language
);
1818 static void free_heap_comp_unit (void *);
1820 static void free_cached_comp_units (void *);
1822 static void age_cached_comp_units (void);
1824 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1826 static struct type
*set_die_type (struct die_info
*, struct type
*,
1827 struct dwarf2_cu
*);
1829 static void create_all_comp_units (struct objfile
*);
1831 static int create_all_type_units (struct objfile
*);
1833 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1836 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1839 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1842 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1843 struct dwarf2_per_cu_data
*);
1845 static void dwarf2_mark (struct dwarf2_cu
*);
1847 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1849 static struct type
*get_die_type_at_offset (sect_offset
,
1850 struct dwarf2_per_cu_data
*);
1852 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1854 static void dwarf2_release_queue (void *dummy
);
1856 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1857 enum language pretend_language
);
1859 static void process_queue (void);
1861 static void find_file_and_directory (struct die_info
*die
,
1862 struct dwarf2_cu
*cu
,
1863 const char **name
, const char **comp_dir
);
1865 static char *file_full_name (int file
, struct line_header
*lh
,
1866 const char *comp_dir
);
1868 static const gdb_byte
*read_and_check_comp_unit_head
1869 (struct comp_unit_head
*header
,
1870 struct dwarf2_section_info
*section
,
1871 struct dwarf2_section_info
*abbrev_section
, const gdb_byte
*info_ptr
,
1872 int is_debug_types_section
);
1874 static void init_cutu_and_read_dies
1875 (struct dwarf2_per_cu_data
*this_cu
, struct abbrev_table
*abbrev_table
,
1876 int use_existing_cu
, int keep
,
1877 die_reader_func_ftype
*die_reader_func
, void *data
);
1879 static void init_cutu_and_read_dies_simple
1880 (struct dwarf2_per_cu_data
*this_cu
,
1881 die_reader_func_ftype
*die_reader_func
, void *data
);
1883 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1885 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
1887 static struct dwo_unit
*lookup_dwo_unit_in_dwp
1888 (struct dwp_file
*dwp_file
, const char *comp_dir
,
1889 ULONGEST signature
, int is_debug_types
);
1891 static struct dwp_file
*get_dwp_file (void);
1893 static struct dwo_unit
*lookup_dwo_comp_unit
1894 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
1896 static struct dwo_unit
*lookup_dwo_type_unit
1897 (struct signatured_type
*, const char *, const char *);
1899 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
1901 static void free_dwo_file_cleanup (void *);
1903 static void process_cu_includes (void);
1905 static void check_producer (struct dwarf2_cu
*cu
);
1907 static void free_line_header_voidp (void *arg
);
1909 /* Various complaints about symbol reading that don't abort the process. */
1912 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
1914 complaint (&symfile_complaints
,
1915 _("statement list doesn't fit in .debug_line section"));
1919 dwarf2_debug_line_missing_file_complaint (void)
1921 complaint (&symfile_complaints
,
1922 _(".debug_line section has line data without a file"));
1926 dwarf2_debug_line_missing_end_sequence_complaint (void)
1928 complaint (&symfile_complaints
,
1929 _(".debug_line section has line "
1930 "program sequence without an end"));
1934 dwarf2_complex_location_expr_complaint (void)
1936 complaint (&symfile_complaints
, _("location expression too complex"));
1940 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
1943 complaint (&symfile_complaints
,
1944 _("const value length mismatch for '%s', got %d, expected %d"),
1949 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
1951 complaint (&symfile_complaints
,
1952 _("debug info runs off end of %s section"
1954 get_section_name (section
),
1955 get_section_file_name (section
));
1959 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
1961 complaint (&symfile_complaints
,
1962 _("macro debug info contains a "
1963 "malformed macro definition:\n`%s'"),
1968 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
1970 complaint (&symfile_complaints
,
1971 _("invalid attribute class or form for '%s' in '%s'"),
1975 /* Hash function for line_header_hash. */
1978 line_header_hash (const struct line_header
*ofs
)
1980 return ofs
->offset
.sect_off
^ ofs
->offset_in_dwz
;
1983 /* Hash function for htab_create_alloc_ex for line_header_hash. */
1986 line_header_hash_voidp (const void *item
)
1988 const struct line_header
*ofs
= (const struct line_header
*) item
;
1990 return line_header_hash (ofs
);
1993 /* Equality function for line_header_hash. */
1996 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
1998 const struct line_header
*ofs_lhs
= (const struct line_header
*) item_lhs
;
1999 const struct line_header
*ofs_rhs
= (const struct line_header
*) item_rhs
;
2001 return (ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
2002 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
2008 /* Convert VALUE between big- and little-endian. */
2010 byte_swap (offset_type value
)
2014 result
= (value
& 0xff) << 24;
2015 result
|= (value
& 0xff00) << 8;
2016 result
|= (value
& 0xff0000) >> 8;
2017 result
|= (value
& 0xff000000) >> 24;
2021 #define MAYBE_SWAP(V) byte_swap (V)
2024 #define MAYBE_SWAP(V) (V)
2025 #endif /* WORDS_BIGENDIAN */
2027 /* Read the given attribute value as an address, taking the attribute's
2028 form into account. */
2031 attr_value_as_address (struct attribute
*attr
)
2035 if (attr
->form
!= DW_FORM_addr
&& attr
->form
!= DW_FORM_GNU_addr_index
)
2037 /* Aside from a few clearly defined exceptions, attributes that
2038 contain an address must always be in DW_FORM_addr form.
2039 Unfortunately, some compilers happen to be violating this
2040 requirement by encoding addresses using other forms, such
2041 as DW_FORM_data4 for example. For those broken compilers,
2042 we try to do our best, without any guarantee of success,
2043 to interpret the address correctly. It would also be nice
2044 to generate a complaint, but that would require us to maintain
2045 a list of legitimate cases where a non-address form is allowed,
2046 as well as update callers to pass in at least the CU's DWARF
2047 version. This is more overhead than what we're willing to
2048 expand for a pretty rare case. */
2049 addr
= DW_UNSND (attr
);
2052 addr
= DW_ADDR (attr
);
2057 /* The suffix for an index file. */
2058 #define INDEX_SUFFIX ".gdb-index"
2060 /* Try to locate the sections we need for DWARF 2 debugging
2061 information and return true if we have enough to do something.
2062 NAMES points to the dwarf2 section names, or is NULL if the standard
2063 ELF names are used. */
2066 dwarf2_has_info (struct objfile
*objfile
,
2067 const struct dwarf2_debug_sections
*names
)
2069 dwarf2_per_objfile
= ((struct dwarf2_per_objfile
*)
2070 objfile_data (objfile
, dwarf2_objfile_data_key
));
2071 if (!dwarf2_per_objfile
)
2073 /* Initialize per-objfile state. */
2074 struct dwarf2_per_objfile
*data
2075 = XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_per_objfile
);
2077 memset (data
, 0, sizeof (*data
));
2078 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
2079 dwarf2_per_objfile
= data
;
2081 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
,
2083 dwarf2_per_objfile
->objfile
= objfile
;
2085 return (!dwarf2_per_objfile
->info
.is_virtual
2086 && dwarf2_per_objfile
->info
.s
.section
!= NULL
2087 && !dwarf2_per_objfile
->abbrev
.is_virtual
2088 && dwarf2_per_objfile
->abbrev
.s
.section
!= NULL
);
2091 /* Return the containing section of virtual section SECTION. */
2093 static struct dwarf2_section_info
*
2094 get_containing_section (const struct dwarf2_section_info
*section
)
2096 gdb_assert (section
->is_virtual
);
2097 return section
->s
.containing_section
;
2100 /* Return the bfd owner of SECTION. */
2103 get_section_bfd_owner (const struct dwarf2_section_info
*section
)
2105 if (section
->is_virtual
)
2107 section
= get_containing_section (section
);
2108 gdb_assert (!section
->is_virtual
);
2110 return section
->s
.section
->owner
;
2113 /* Return the bfd section of SECTION.
2114 Returns NULL if the section is not present. */
2117 get_section_bfd_section (const struct dwarf2_section_info
*section
)
2119 if (section
->is_virtual
)
2121 section
= get_containing_section (section
);
2122 gdb_assert (!section
->is_virtual
);
2124 return section
->s
.section
;
2127 /* Return the name of SECTION. */
2130 get_section_name (const struct dwarf2_section_info
*section
)
2132 asection
*sectp
= get_section_bfd_section (section
);
2134 gdb_assert (sectp
!= NULL
);
2135 return bfd_section_name (get_section_bfd_owner (section
), sectp
);
2138 /* Return the name of the file SECTION is in. */
2141 get_section_file_name (const struct dwarf2_section_info
*section
)
2143 bfd
*abfd
= get_section_bfd_owner (section
);
2145 return bfd_get_filename (abfd
);
2148 /* Return the id of SECTION.
2149 Returns 0 if SECTION doesn't exist. */
2152 get_section_id (const struct dwarf2_section_info
*section
)
2154 asection
*sectp
= get_section_bfd_section (section
);
2161 /* Return the flags of SECTION.
2162 SECTION (or containing section if this is a virtual section) must exist. */
2165 get_section_flags (const struct dwarf2_section_info
*section
)
2167 asection
*sectp
= get_section_bfd_section (section
);
2169 gdb_assert (sectp
!= NULL
);
2170 return bfd_get_section_flags (sectp
->owner
, sectp
);
2173 /* When loading sections, we look either for uncompressed section or for
2174 compressed section names. */
2177 section_is_p (const char *section_name
,
2178 const struct dwarf2_section_names
*names
)
2180 if (names
->normal
!= NULL
2181 && strcmp (section_name
, names
->normal
) == 0)
2183 if (names
->compressed
!= NULL
2184 && strcmp (section_name
, names
->compressed
) == 0)
2189 /* This function is mapped across the sections and remembers the
2190 offset and size of each of the debugging sections we are interested
2194 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *vnames
)
2196 const struct dwarf2_debug_sections
*names
;
2197 flagword aflag
= bfd_get_section_flags (abfd
, sectp
);
2200 names
= &dwarf2_elf_names
;
2202 names
= (const struct dwarf2_debug_sections
*) vnames
;
2204 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
2207 else if (section_is_p (sectp
->name
, &names
->info
))
2209 dwarf2_per_objfile
->info
.s
.section
= sectp
;
2210 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
2212 else if (section_is_p (sectp
->name
, &names
->abbrev
))
2214 dwarf2_per_objfile
->abbrev
.s
.section
= sectp
;
2215 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
2217 else if (section_is_p (sectp
->name
, &names
->line
))
2219 dwarf2_per_objfile
->line
.s
.section
= sectp
;
2220 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
2222 else if (section_is_p (sectp
->name
, &names
->loc
))
2224 dwarf2_per_objfile
->loc
.s
.section
= sectp
;
2225 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
2227 else if (section_is_p (sectp
->name
, &names
->macinfo
))
2229 dwarf2_per_objfile
->macinfo
.s
.section
= sectp
;
2230 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
2232 else if (section_is_p (sectp
->name
, &names
->macro
))
2234 dwarf2_per_objfile
->macro
.s
.section
= sectp
;
2235 dwarf2_per_objfile
->macro
.size
= bfd_get_section_size (sectp
);
2237 else if (section_is_p (sectp
->name
, &names
->str
))
2239 dwarf2_per_objfile
->str
.s
.section
= sectp
;
2240 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
2242 else if (section_is_p (sectp
->name
, &names
->addr
))
2244 dwarf2_per_objfile
->addr
.s
.section
= sectp
;
2245 dwarf2_per_objfile
->addr
.size
= bfd_get_section_size (sectp
);
2247 else if (section_is_p (sectp
->name
, &names
->frame
))
2249 dwarf2_per_objfile
->frame
.s
.section
= sectp
;
2250 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
2252 else if (section_is_p (sectp
->name
, &names
->eh_frame
))
2254 dwarf2_per_objfile
->eh_frame
.s
.section
= sectp
;
2255 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
2257 else if (section_is_p (sectp
->name
, &names
->ranges
))
2259 dwarf2_per_objfile
->ranges
.s
.section
= sectp
;
2260 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
2262 else if (section_is_p (sectp
->name
, &names
->types
))
2264 struct dwarf2_section_info type_section
;
2266 memset (&type_section
, 0, sizeof (type_section
));
2267 type_section
.s
.section
= sectp
;
2268 type_section
.size
= bfd_get_section_size (sectp
);
2270 VEC_safe_push (dwarf2_section_info_def
, dwarf2_per_objfile
->types
,
2273 else if (section_is_p (sectp
->name
, &names
->gdb_index
))
2275 dwarf2_per_objfile
->gdb_index
.s
.section
= sectp
;
2276 dwarf2_per_objfile
->gdb_index
.size
= bfd_get_section_size (sectp
);
2279 if ((bfd_get_section_flags (abfd
, sectp
) & (SEC_LOAD
| SEC_ALLOC
))
2280 && bfd_section_vma (abfd
, sectp
) == 0)
2281 dwarf2_per_objfile
->has_section_at_zero
= 1;
2284 /* A helper function that decides whether a section is empty,
2288 dwarf2_section_empty_p (const struct dwarf2_section_info
*section
)
2290 if (section
->is_virtual
)
2291 return section
->size
== 0;
2292 return section
->s
.section
== NULL
|| section
->size
== 0;
2295 /* Read the contents of the section INFO.
2296 OBJFILE is the main object file, but not necessarily the file where
2297 the section comes from. E.g., for DWO files the bfd of INFO is the bfd
2299 If the section is compressed, uncompress it before returning. */
2302 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
2306 gdb_byte
*buf
, *retbuf
;
2310 info
->buffer
= NULL
;
2313 if (dwarf2_section_empty_p (info
))
2316 sectp
= get_section_bfd_section (info
);
2318 /* If this is a virtual section we need to read in the real one first. */
2319 if (info
->is_virtual
)
2321 struct dwarf2_section_info
*containing_section
=
2322 get_containing_section (info
);
2324 gdb_assert (sectp
!= NULL
);
2325 if ((sectp
->flags
& SEC_RELOC
) != 0)
2327 error (_("Dwarf Error: DWP format V2 with relocations is not"
2328 " supported in section %s [in module %s]"),
2329 get_section_name (info
), get_section_file_name (info
));
2331 dwarf2_read_section (objfile
, containing_section
);
2332 /* Other code should have already caught virtual sections that don't
2334 gdb_assert (info
->virtual_offset
+ info
->size
2335 <= containing_section
->size
);
2336 /* If the real section is empty or there was a problem reading the
2337 section we shouldn't get here. */
2338 gdb_assert (containing_section
->buffer
!= NULL
);
2339 info
->buffer
= containing_section
->buffer
+ info
->virtual_offset
;
2343 /* If the section has relocations, we must read it ourselves.
2344 Otherwise we attach it to the BFD. */
2345 if ((sectp
->flags
& SEC_RELOC
) == 0)
2347 info
->buffer
= gdb_bfd_map_section (sectp
, &info
->size
);
2351 buf
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
2354 /* When debugging .o files, we may need to apply relocations; see
2355 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
2356 We never compress sections in .o files, so we only need to
2357 try this when the section is not compressed. */
2358 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
2361 info
->buffer
= retbuf
;
2365 abfd
= get_section_bfd_owner (info
);
2366 gdb_assert (abfd
!= NULL
);
2368 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
2369 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
2371 error (_("Dwarf Error: Can't read DWARF data"
2372 " in section %s [in module %s]"),
2373 bfd_section_name (abfd
, sectp
), bfd_get_filename (abfd
));
2377 /* A helper function that returns the size of a section in a safe way.
2378 If you are positive that the section has been read before using the
2379 size, then it is safe to refer to the dwarf2_section_info object's
2380 "size" field directly. In other cases, you must call this
2381 function, because for compressed sections the size field is not set
2382 correctly until the section has been read. */
2384 static bfd_size_type
2385 dwarf2_section_size (struct objfile
*objfile
,
2386 struct dwarf2_section_info
*info
)
2389 dwarf2_read_section (objfile
, info
);
2393 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2397 dwarf2_get_section_info (struct objfile
*objfile
,
2398 enum dwarf2_section_enum sect
,
2399 asection
**sectp
, const gdb_byte
**bufp
,
2400 bfd_size_type
*sizep
)
2402 struct dwarf2_per_objfile
*data
2403 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
2404 dwarf2_objfile_data_key
);
2405 struct dwarf2_section_info
*info
;
2407 /* We may see an objfile without any DWARF, in which case we just
2418 case DWARF2_DEBUG_FRAME
:
2419 info
= &data
->frame
;
2421 case DWARF2_EH_FRAME
:
2422 info
= &data
->eh_frame
;
2425 gdb_assert_not_reached ("unexpected section");
2428 dwarf2_read_section (objfile
, info
);
2430 *sectp
= get_section_bfd_section (info
);
2431 *bufp
= info
->buffer
;
2432 *sizep
= info
->size
;
2435 /* A helper function to find the sections for a .dwz file. */
2438 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2440 struct dwz_file
*dwz_file
= (struct dwz_file
*) arg
;
2442 /* Note that we only support the standard ELF names, because .dwz
2443 is ELF-only (at the time of writing). */
2444 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2446 dwz_file
->abbrev
.s
.section
= sectp
;
2447 dwz_file
->abbrev
.size
= bfd_get_section_size (sectp
);
2449 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2451 dwz_file
->info
.s
.section
= sectp
;
2452 dwz_file
->info
.size
= bfd_get_section_size (sectp
);
2454 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2456 dwz_file
->str
.s
.section
= sectp
;
2457 dwz_file
->str
.size
= bfd_get_section_size (sectp
);
2459 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2461 dwz_file
->line
.s
.section
= sectp
;
2462 dwz_file
->line
.size
= bfd_get_section_size (sectp
);
2464 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2466 dwz_file
->macro
.s
.section
= sectp
;
2467 dwz_file
->macro
.size
= bfd_get_section_size (sectp
);
2469 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2471 dwz_file
->gdb_index
.s
.section
= sectp
;
2472 dwz_file
->gdb_index
.size
= bfd_get_section_size (sectp
);
2476 /* Open the separate '.dwz' debug file, if needed. Return NULL if
2477 there is no .gnu_debugaltlink section in the file. Error if there
2478 is such a section but the file cannot be found. */
2480 static struct dwz_file
*
2481 dwarf2_get_dwz_file (void)
2484 struct cleanup
*cleanup
;
2485 const char *filename
;
2486 struct dwz_file
*result
;
2487 bfd_size_type buildid_len_arg
;
2491 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2492 return dwarf2_per_objfile
->dwz_file
;
2494 bfd_set_error (bfd_error_no_error
);
2495 data
= bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2496 &buildid_len_arg
, &buildid
);
2499 if (bfd_get_error () == bfd_error_no_error
)
2501 error (_("could not read '.gnu_debugaltlink' section: %s"),
2502 bfd_errmsg (bfd_get_error ()));
2504 cleanup
= make_cleanup (xfree
, data
);
2505 make_cleanup (xfree
, buildid
);
2507 buildid_len
= (size_t) buildid_len_arg
;
2509 filename
= (const char *) data
;
2510 if (!IS_ABSOLUTE_PATH (filename
))
2512 char *abs
= gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2515 make_cleanup (xfree
, abs
);
2516 abs
= ldirname (abs
);
2517 make_cleanup (xfree
, abs
);
2519 rel
= concat (abs
, SLASH_STRING
, filename
, (char *) NULL
);
2520 make_cleanup (xfree
, rel
);
2524 /* First try the file name given in the section. If that doesn't
2525 work, try to use the build-id instead. */
2526 gdb_bfd_ref_ptr
dwz_bfd (gdb_bfd_open (filename
, gnutarget
, -1));
2527 if (dwz_bfd
!= NULL
)
2529 if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2533 if (dwz_bfd
== NULL
)
2534 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2536 if (dwz_bfd
== NULL
)
2537 error (_("could not find '.gnu_debugaltlink' file for %s"),
2538 objfile_name (dwarf2_per_objfile
->objfile
));
2540 result
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
2542 result
->dwz_bfd
= dwz_bfd
.release ();
2544 bfd_map_over_sections (result
->dwz_bfd
, locate_dwz_sections
, result
);
2546 do_cleanups (cleanup
);
2548 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, result
->dwz_bfd
);
2549 dwarf2_per_objfile
->dwz_file
= result
;
2553 /* DWARF quick_symbols_functions support. */
2555 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2556 unique line tables, so we maintain a separate table of all .debug_line
2557 derived entries to support the sharing.
2558 All the quick functions need is the list of file names. We discard the
2559 line_header when we're done and don't need to record it here. */
2560 struct quick_file_names
2562 /* The data used to construct the hash key. */
2563 struct stmt_list_hash hash
;
2565 /* The number of entries in file_names, real_names. */
2566 unsigned int num_file_names
;
2568 /* The file names from the line table, after being run through
2570 const char **file_names
;
2572 /* The file names from the line table after being run through
2573 gdb_realpath. These are computed lazily. */
2574 const char **real_names
;
2577 /* When using the index (and thus not using psymtabs), each CU has an
2578 object of this type. This is used to hold information needed by
2579 the various "quick" methods. */
2580 struct dwarf2_per_cu_quick_data
2582 /* The file table. This can be NULL if there was no file table
2583 or it's currently not read in.
2584 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2585 struct quick_file_names
*file_names
;
2587 /* The corresponding symbol table. This is NULL if symbols for this
2588 CU have not yet been read. */
2589 struct compunit_symtab
*compunit_symtab
;
2591 /* A temporary mark bit used when iterating over all CUs in
2592 expand_symtabs_matching. */
2593 unsigned int mark
: 1;
2595 /* True if we've tried to read the file table and found there isn't one.
2596 There will be no point in trying to read it again next time. */
2597 unsigned int no_file_data
: 1;
2600 /* Utility hash function for a stmt_list_hash. */
2603 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2607 if (stmt_list_hash
->dwo_unit
!= NULL
)
2608 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2609 v
+= stmt_list_hash
->line_offset
.sect_off
;
2613 /* Utility equality function for a stmt_list_hash. */
2616 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2617 const struct stmt_list_hash
*rhs
)
2619 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2621 if (lhs
->dwo_unit
!= NULL
2622 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2625 return lhs
->line_offset
.sect_off
== rhs
->line_offset
.sect_off
;
2628 /* Hash function for a quick_file_names. */
2631 hash_file_name_entry (const void *e
)
2633 const struct quick_file_names
*file_data
2634 = (const struct quick_file_names
*) e
;
2636 return hash_stmt_list_entry (&file_data
->hash
);
2639 /* Equality function for a quick_file_names. */
2642 eq_file_name_entry (const void *a
, const void *b
)
2644 const struct quick_file_names
*ea
= (const struct quick_file_names
*) a
;
2645 const struct quick_file_names
*eb
= (const struct quick_file_names
*) b
;
2647 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2650 /* Delete function for a quick_file_names. */
2653 delete_file_name_entry (void *e
)
2655 struct quick_file_names
*file_data
= (struct quick_file_names
*) e
;
2658 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2660 xfree ((void*) file_data
->file_names
[i
]);
2661 if (file_data
->real_names
)
2662 xfree ((void*) file_data
->real_names
[i
]);
2665 /* The space for the struct itself lives on objfile_obstack,
2666 so we don't free it here. */
2669 /* Create a quick_file_names hash table. */
2672 create_quick_file_names_table (unsigned int nr_initial_entries
)
2674 return htab_create_alloc (nr_initial_entries
,
2675 hash_file_name_entry
, eq_file_name_entry
,
2676 delete_file_name_entry
, xcalloc
, xfree
);
2679 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2680 have to be created afterwards. You should call age_cached_comp_units after
2681 processing PER_CU->CU. dw2_setup must have been already called. */
2684 load_cu (struct dwarf2_per_cu_data
*per_cu
)
2686 if (per_cu
->is_debug_types
)
2687 load_full_type_unit (per_cu
);
2689 load_full_comp_unit (per_cu
, language_minimal
);
2691 if (per_cu
->cu
== NULL
)
2692 return; /* Dummy CU. */
2694 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2697 /* Read in the symbols for PER_CU. */
2700 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2702 struct cleanup
*back_to
;
2704 /* Skip type_unit_groups, reading the type units they contain
2705 is handled elsewhere. */
2706 if (IS_TYPE_UNIT_GROUP (per_cu
))
2709 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
2711 if (dwarf2_per_objfile
->using_index
2712 ? per_cu
->v
.quick
->compunit_symtab
== NULL
2713 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2715 queue_comp_unit (per_cu
, language_minimal
);
2718 /* If we just loaded a CU from a DWO, and we're working with an index
2719 that may badly handle TUs, load all the TUs in that DWO as well.
2720 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2721 if (!per_cu
->is_debug_types
2722 && per_cu
->cu
!= NULL
2723 && per_cu
->cu
->dwo_unit
!= NULL
2724 && dwarf2_per_objfile
->index_table
!= NULL
2725 && dwarf2_per_objfile
->index_table
->version
<= 7
2726 /* DWP files aren't supported yet. */
2727 && get_dwp_file () == NULL
)
2728 queue_and_load_all_dwo_tus (per_cu
);
2733 /* Age the cache, releasing compilation units that have not
2734 been used recently. */
2735 age_cached_comp_units ();
2737 do_cleanups (back_to
);
2740 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2741 the objfile from which this CU came. Returns the resulting symbol
2744 static struct compunit_symtab
*
2745 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2747 gdb_assert (dwarf2_per_objfile
->using_index
);
2748 if (!per_cu
->v
.quick
->compunit_symtab
)
2750 struct cleanup
*back_to
= make_cleanup (free_cached_comp_units
, NULL
);
2751 increment_reading_symtab ();
2752 dw2_do_instantiate_symtab (per_cu
);
2753 process_cu_includes ();
2754 do_cleanups (back_to
);
2757 return per_cu
->v
.quick
->compunit_symtab
;
2760 /* Return the CU/TU given its index.
2762 This is intended for loops like:
2764 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2765 + dwarf2_per_objfile->n_type_units); ++i)
2767 struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i);
2773 static struct dwarf2_per_cu_data
*
2774 dw2_get_cutu (int index
)
2776 if (index
>= dwarf2_per_objfile
->n_comp_units
)
2778 index
-= dwarf2_per_objfile
->n_comp_units
;
2779 gdb_assert (index
< dwarf2_per_objfile
->n_type_units
);
2780 return &dwarf2_per_objfile
->all_type_units
[index
]->per_cu
;
2783 return dwarf2_per_objfile
->all_comp_units
[index
];
2786 /* Return the CU given its index.
2787 This differs from dw2_get_cutu in that it's for when you know INDEX
2790 static struct dwarf2_per_cu_data
*
2791 dw2_get_cu (int index
)
2793 gdb_assert (index
>= 0 && index
< dwarf2_per_objfile
->n_comp_units
);
2795 return dwarf2_per_objfile
->all_comp_units
[index
];
2798 /* A helper for create_cus_from_index that handles a given list of
2802 create_cus_from_index_list (struct objfile
*objfile
,
2803 const gdb_byte
*cu_list
, offset_type n_elements
,
2804 struct dwarf2_section_info
*section
,
2810 for (i
= 0; i
< n_elements
; i
+= 2)
2812 struct dwarf2_per_cu_data
*the_cu
;
2813 ULONGEST offset
, length
;
2815 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2816 offset
= extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2817 length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2820 the_cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2821 struct dwarf2_per_cu_data
);
2822 the_cu
->offset
.sect_off
= offset
;
2823 the_cu
->length
= length
;
2824 the_cu
->objfile
= objfile
;
2825 the_cu
->section
= section
;
2826 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2827 struct dwarf2_per_cu_quick_data
);
2828 the_cu
->is_dwz
= is_dwz
;
2829 dwarf2_per_objfile
->all_comp_units
[base_offset
+ i
/ 2] = the_cu
;
2833 /* Read the CU list from the mapped index, and use it to create all
2834 the CU objects for this objfile. */
2837 create_cus_from_index (struct objfile
*objfile
,
2838 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
2839 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
2841 struct dwz_file
*dwz
;
2843 dwarf2_per_objfile
->n_comp_units
= (cu_list_elements
+ dwz_elements
) / 2;
2844 dwarf2_per_objfile
->all_comp_units
=
2845 XOBNEWVEC (&objfile
->objfile_obstack
, struct dwarf2_per_cu_data
*,
2846 dwarf2_per_objfile
->n_comp_units
);
2848 create_cus_from_index_list (objfile
, cu_list
, cu_list_elements
,
2849 &dwarf2_per_objfile
->info
, 0, 0);
2851 if (dwz_elements
== 0)
2854 dwz
= dwarf2_get_dwz_file ();
2855 create_cus_from_index_list (objfile
, dwz_list
, dwz_elements
, &dwz
->info
, 1,
2856 cu_list_elements
/ 2);
2859 /* Create the signatured type hash table from the index. */
2862 create_signatured_type_table_from_index (struct objfile
*objfile
,
2863 struct dwarf2_section_info
*section
,
2864 const gdb_byte
*bytes
,
2865 offset_type elements
)
2868 htab_t sig_types_hash
;
2870 dwarf2_per_objfile
->n_type_units
2871 = dwarf2_per_objfile
->n_allocated_type_units
2873 dwarf2_per_objfile
->all_type_units
=
2874 XNEWVEC (struct signatured_type
*, dwarf2_per_objfile
->n_type_units
);
2876 sig_types_hash
= allocate_signatured_type_table (objfile
);
2878 for (i
= 0; i
< elements
; i
+= 3)
2880 struct signatured_type
*sig_type
;
2881 ULONGEST offset
, type_offset_in_tu
, signature
;
2884 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2885 offset
= extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
2886 type_offset_in_tu
= extract_unsigned_integer (bytes
+ 8, 8,
2888 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
2891 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2892 struct signatured_type
);
2893 sig_type
->signature
= signature
;
2894 sig_type
->type_offset_in_tu
.cu_off
= type_offset_in_tu
;
2895 sig_type
->per_cu
.is_debug_types
= 1;
2896 sig_type
->per_cu
.section
= section
;
2897 sig_type
->per_cu
.offset
.sect_off
= offset
;
2898 sig_type
->per_cu
.objfile
= objfile
;
2899 sig_type
->per_cu
.v
.quick
2900 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2901 struct dwarf2_per_cu_quick_data
);
2903 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
2906 dwarf2_per_objfile
->all_type_units
[i
/ 3] = sig_type
;
2909 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
2912 /* Read the address map data from the mapped index, and use it to
2913 populate the objfile's psymtabs_addrmap. */
2916 create_addrmap_from_index (struct objfile
*objfile
, struct mapped_index
*index
)
2918 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2919 const gdb_byte
*iter
, *end
;
2920 struct obstack temp_obstack
;
2921 struct addrmap
*mutable_map
;
2922 struct cleanup
*cleanup
;
2925 obstack_init (&temp_obstack
);
2926 cleanup
= make_cleanup_obstack_free (&temp_obstack
);
2927 mutable_map
= addrmap_create_mutable (&temp_obstack
);
2929 iter
= index
->address_table
;
2930 end
= iter
+ index
->address_table_size
;
2932 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2936 ULONGEST hi
, lo
, cu_index
;
2937 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2939 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2941 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
2946 complaint (&symfile_complaints
,
2947 _(".gdb_index address table has invalid range (%s - %s)"),
2948 hex_string (lo
), hex_string (hi
));
2952 if (cu_index
>= dwarf2_per_objfile
->n_comp_units
)
2954 complaint (&symfile_complaints
,
2955 _(".gdb_index address table has invalid CU number %u"),
2956 (unsigned) cu_index
);
2960 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
);
2961 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
);
2962 addrmap_set_empty (mutable_map
, lo
, hi
- 1, dw2_get_cutu (cu_index
));
2965 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
2966 &objfile
->objfile_obstack
);
2967 do_cleanups (cleanup
);
2970 /* The hash function for strings in the mapped index. This is the same as
2971 SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the
2972 implementation. This is necessary because the hash function is tied to the
2973 format of the mapped index file. The hash values do not have to match with
2976 Use INT_MAX for INDEX_VERSION if you generate the current index format. */
2979 mapped_index_string_hash (int index_version
, const void *p
)
2981 const unsigned char *str
= (const unsigned char *) p
;
2985 while ((c
= *str
++) != 0)
2987 if (index_version
>= 5)
2989 r
= r
* 67 + c
- 113;
2995 /* Find a slot in the mapped index INDEX for the object named NAME.
2996 If NAME is found, set *VEC_OUT to point to the CU vector in the
2997 constant pool and return 1. If NAME cannot be found, return 0. */
3000 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
3001 offset_type
**vec_out
)
3003 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
3005 offset_type slot
, step
;
3006 int (*cmp
) (const char *, const char *);
3008 if (current_language
->la_language
== language_cplus
3009 || current_language
->la_language
== language_fortran
3010 || current_language
->la_language
== language_d
)
3012 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
3015 if (strchr (name
, '(') != NULL
)
3017 char *without_params
= cp_remove_params (name
);
3019 if (without_params
!= NULL
)
3021 make_cleanup (xfree
, without_params
);
3022 name
= without_params
;
3027 /* Index version 4 did not support case insensitive searches. But the
3028 indices for case insensitive languages are built in lowercase, therefore
3029 simulate our NAME being searched is also lowercased. */
3030 hash
= mapped_index_string_hash ((index
->version
== 4
3031 && case_sensitivity
== case_sensitive_off
3032 ? 5 : index
->version
),
3035 slot
= hash
& (index
->symbol_table_slots
- 1);
3036 step
= ((hash
* 17) & (index
->symbol_table_slots
- 1)) | 1;
3037 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
3041 /* Convert a slot number to an offset into the table. */
3042 offset_type i
= 2 * slot
;
3044 if (index
->symbol_table
[i
] == 0 && index
->symbol_table
[i
+ 1] == 0)
3046 do_cleanups (back_to
);
3050 str
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[i
]);
3051 if (!cmp (name
, str
))
3053 *vec_out
= (offset_type
*) (index
->constant_pool
3054 + MAYBE_SWAP (index
->symbol_table
[i
+ 1]));
3055 do_cleanups (back_to
);
3059 slot
= (slot
+ step
) & (index
->symbol_table_slots
- 1);
3063 /* A helper function that reads the .gdb_index from SECTION and fills
3064 in MAP. FILENAME is the name of the file containing the section;
3065 it is used for error reporting. DEPRECATED_OK is nonzero if it is
3066 ok to use deprecated sections.
3068 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
3069 out parameters that are filled in with information about the CU and
3070 TU lists in the section.
3072 Returns 1 if all went well, 0 otherwise. */
3075 read_index_from_section (struct objfile
*objfile
,
3076 const char *filename
,
3078 struct dwarf2_section_info
*section
,
3079 struct mapped_index
*map
,
3080 const gdb_byte
**cu_list
,
3081 offset_type
*cu_list_elements
,
3082 const gdb_byte
**types_list
,
3083 offset_type
*types_list_elements
)
3085 const gdb_byte
*addr
;
3086 offset_type version
;
3087 offset_type
*metadata
;
3090 if (dwarf2_section_empty_p (section
))
3093 /* Older elfutils strip versions could keep the section in the main
3094 executable while splitting it for the separate debug info file. */
3095 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
3098 dwarf2_read_section (objfile
, section
);
3100 addr
= section
->buffer
;
3101 /* Version check. */
3102 version
= MAYBE_SWAP (*(offset_type
*) addr
);
3103 /* Versions earlier than 3 emitted every copy of a psymbol. This
3104 causes the index to behave very poorly for certain requests. Version 3
3105 contained incomplete addrmap. So, it seems better to just ignore such
3109 static int warning_printed
= 0;
3110 if (!warning_printed
)
3112 warning (_("Skipping obsolete .gdb_index section in %s."),
3114 warning_printed
= 1;
3118 /* Index version 4 uses a different hash function than index version
3121 Versions earlier than 6 did not emit psymbols for inlined
3122 functions. Using these files will cause GDB not to be able to
3123 set breakpoints on inlined functions by name, so we ignore these
3124 indices unless the user has done
3125 "set use-deprecated-index-sections on". */
3126 if (version
< 6 && !deprecated_ok
)
3128 static int warning_printed
= 0;
3129 if (!warning_printed
)
3132 Skipping deprecated .gdb_index section in %s.\n\
3133 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3134 to use the section anyway."),
3136 warning_printed
= 1;
3140 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3141 of the TU (for symbols coming from TUs),
3142 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3143 Plus gold-generated indices can have duplicate entries for global symbols,
3144 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3145 These are just performance bugs, and we can't distinguish gdb-generated
3146 indices from gold-generated ones, so issue no warning here. */
3148 /* Indexes with higher version than the one supported by GDB may be no
3149 longer backward compatible. */
3153 map
->version
= version
;
3154 map
->total_size
= section
->size
;
3156 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3159 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3160 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3164 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3165 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3166 - MAYBE_SWAP (metadata
[i
]))
3170 map
->address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3171 map
->address_table_size
= (MAYBE_SWAP (metadata
[i
+ 1])
3172 - MAYBE_SWAP (metadata
[i
]));
3175 map
->symbol_table
= (offset_type
*) (addr
+ MAYBE_SWAP (metadata
[i
]));
3176 map
->symbol_table_slots
= ((MAYBE_SWAP (metadata
[i
+ 1])
3177 - MAYBE_SWAP (metadata
[i
]))
3178 / (2 * sizeof (offset_type
)));
3181 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3187 /* Read the index file. If everything went ok, initialize the "quick"
3188 elements of all the CUs and return 1. Otherwise, return 0. */
3191 dwarf2_read_index (struct objfile
*objfile
)
3193 struct mapped_index local_map
, *map
;
3194 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3195 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3196 struct dwz_file
*dwz
;
3198 if (!read_index_from_section (objfile
, objfile_name (objfile
),
3199 use_deprecated_index_sections
,
3200 &dwarf2_per_objfile
->gdb_index
, &local_map
,
3201 &cu_list
, &cu_list_elements
,
3202 &types_list
, &types_list_elements
))
3205 /* Don't use the index if it's empty. */
3206 if (local_map
.symbol_table_slots
== 0)
3209 /* If there is a .dwz file, read it so we can get its CU list as
3211 dwz
= dwarf2_get_dwz_file ();
3214 struct mapped_index dwz_map
;
3215 const gdb_byte
*dwz_types_ignore
;
3216 offset_type dwz_types_elements_ignore
;
3218 if (!read_index_from_section (objfile
, bfd_get_filename (dwz
->dwz_bfd
),
3220 &dwz
->gdb_index
, &dwz_map
,
3221 &dwz_list
, &dwz_list_elements
,
3223 &dwz_types_elements_ignore
))
3225 warning (_("could not read '.gdb_index' section from %s; skipping"),
3226 bfd_get_filename (dwz
->dwz_bfd
));
3231 create_cus_from_index (objfile
, cu_list
, cu_list_elements
, dwz_list
,
3234 if (types_list_elements
)
3236 struct dwarf2_section_info
*section
;
3238 /* We can only handle a single .debug_types when we have an
3240 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
3243 section
= VEC_index (dwarf2_section_info_def
,
3244 dwarf2_per_objfile
->types
, 0);
3246 create_signatured_type_table_from_index (objfile
, section
, types_list
,
3247 types_list_elements
);
3250 create_addrmap_from_index (objfile
, &local_map
);
3252 map
= XOBNEW (&objfile
->objfile_obstack
, struct mapped_index
);
3255 dwarf2_per_objfile
->index_table
= map
;
3256 dwarf2_per_objfile
->using_index
= 1;
3257 dwarf2_per_objfile
->quick_file_names_table
=
3258 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
3263 /* A helper for the "quick" functions which sets the global
3264 dwarf2_per_objfile according to OBJFILE. */
3267 dw2_setup (struct objfile
*objfile
)
3269 dwarf2_per_objfile
= ((struct dwarf2_per_objfile
*)
3270 objfile_data (objfile
, dwarf2_objfile_data_key
));
3271 gdb_assert (dwarf2_per_objfile
);
3274 /* die_reader_func for dw2_get_file_names. */
3277 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3278 const gdb_byte
*info_ptr
,
3279 struct die_info
*comp_unit_die
,
3283 struct dwarf2_cu
*cu
= reader
->cu
;
3284 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3285 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3286 struct dwarf2_per_cu_data
*lh_cu
;
3287 struct line_header
*lh
;
3288 struct attribute
*attr
;
3290 const char *name
, *comp_dir
;
3292 struct quick_file_names
*qfn
;
3293 unsigned int line_offset
;
3295 gdb_assert (! this_cu
->is_debug_types
);
3297 /* Our callers never want to match partial units -- instead they
3298 will match the enclosing full CU. */
3299 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3301 this_cu
->v
.quick
->no_file_data
= 1;
3310 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3313 struct quick_file_names find_entry
;
3315 line_offset
= DW_UNSND (attr
);
3317 /* We may have already read in this line header (TU line header sharing).
3318 If we have we're done. */
3319 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3320 find_entry
.hash
.line_offset
.sect_off
= line_offset
;
3321 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
3322 &find_entry
, INSERT
);
3325 lh_cu
->v
.quick
->file_names
= (struct quick_file_names
*) *slot
;
3329 lh
= dwarf_decode_line_header (line_offset
, cu
);
3333 lh_cu
->v
.quick
->no_file_data
= 1;
3337 qfn
= XOBNEW (&objfile
->objfile_obstack
, struct quick_file_names
);
3338 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3339 qfn
->hash
.line_offset
.sect_off
= line_offset
;
3340 gdb_assert (slot
!= NULL
);
3343 find_file_and_directory (comp_unit_die
, cu
, &name
, &comp_dir
);
3345 qfn
->num_file_names
= lh
->num_file_names
;
3347 XOBNEWVEC (&objfile
->objfile_obstack
, const char *, lh
->num_file_names
);
3348 for (i
= 0; i
< lh
->num_file_names
; ++i
)
3349 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
, comp_dir
);
3350 qfn
->real_names
= NULL
;
3352 free_line_header (lh
);
3354 lh_cu
->v
.quick
->file_names
= qfn
;
3357 /* A helper for the "quick" functions which attempts to read the line
3358 table for THIS_CU. */
3360 static struct quick_file_names
*
3361 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3363 /* This should never be called for TUs. */
3364 gdb_assert (! this_cu
->is_debug_types
);
3365 /* Nor type unit groups. */
3366 gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu
));
3368 if (this_cu
->v
.quick
->file_names
!= NULL
)
3369 return this_cu
->v
.quick
->file_names
;
3370 /* If we know there is no line data, no point in looking again. */
3371 if (this_cu
->v
.quick
->no_file_data
)
3374 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
3376 if (this_cu
->v
.quick
->no_file_data
)
3378 return this_cu
->v
.quick
->file_names
;
3381 /* A helper for the "quick" functions which computes and caches the
3382 real path for a given file name from the line table. */
3385 dw2_get_real_path (struct objfile
*objfile
,
3386 struct quick_file_names
*qfn
, int index
)
3388 if (qfn
->real_names
== NULL
)
3389 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
3390 qfn
->num_file_names
, const char *);
3392 if (qfn
->real_names
[index
] == NULL
)
3393 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]);
3395 return qfn
->real_names
[index
];
3398 static struct symtab
*
3399 dw2_find_last_source_symtab (struct objfile
*objfile
)
3401 struct compunit_symtab
*cust
;
3404 dw2_setup (objfile
);
3405 index
= dwarf2_per_objfile
->n_comp_units
- 1;
3406 cust
= dw2_instantiate_symtab (dw2_get_cutu (index
));
3409 return compunit_primary_filetab (cust
);
3412 /* Traversal function for dw2_forget_cached_source_info. */
3415 dw2_free_cached_file_names (void **slot
, void *info
)
3417 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3419 if (file_data
->real_names
)
3423 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3425 xfree ((void*) file_data
->real_names
[i
]);
3426 file_data
->real_names
[i
] = NULL
;
3434 dw2_forget_cached_source_info (struct objfile
*objfile
)
3436 dw2_setup (objfile
);
3438 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
3439 dw2_free_cached_file_names
, NULL
);
3442 /* Helper function for dw2_map_symtabs_matching_filename that expands
3443 the symtabs and calls the iterator. */
3446 dw2_map_expand_apply (struct objfile
*objfile
,
3447 struct dwarf2_per_cu_data
*per_cu
,
3448 const char *name
, const char *real_path
,
3449 int (*callback
) (struct symtab
*, void *),
3452 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3454 /* Don't visit already-expanded CUs. */
3455 if (per_cu
->v
.quick
->compunit_symtab
)
3458 /* This may expand more than one symtab, and we want to iterate over
3460 dw2_instantiate_symtab (per_cu
);
3462 return iterate_over_some_symtabs (name
, real_path
, callback
, data
,
3463 objfile
->compunit_symtabs
, last_made
);
3466 /* Implementation of the map_symtabs_matching_filename method. */
3469 dw2_map_symtabs_matching_filename (struct objfile
*objfile
, const char *name
,
3470 const char *real_path
,
3471 int (*callback
) (struct symtab
*, void *),
3475 const char *name_basename
= lbasename (name
);
3477 dw2_setup (objfile
);
3479 /* The rule is CUs specify all the files, including those used by
3480 any TU, so there's no need to scan TUs here. */
3482 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3485 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3486 struct quick_file_names
*file_data
;
3488 /* We only need to look at symtabs not already expanded. */
3489 if (per_cu
->v
.quick
->compunit_symtab
)
3492 file_data
= dw2_get_file_names (per_cu
);
3493 if (file_data
== NULL
)
3496 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3498 const char *this_name
= file_data
->file_names
[j
];
3499 const char *this_real_name
;
3501 if (compare_filenames_for_search (this_name
, name
))
3503 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3509 /* Before we invoke realpath, which can get expensive when many
3510 files are involved, do a quick comparison of the basenames. */
3511 if (! basenames_may_differ
3512 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3515 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3516 if (compare_filenames_for_search (this_real_name
, name
))
3518 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3524 if (real_path
!= NULL
)
3526 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3527 gdb_assert (IS_ABSOLUTE_PATH (name
));
3528 if (this_real_name
!= NULL
3529 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3531 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3543 /* Struct used to manage iterating over all CUs looking for a symbol. */
3545 struct dw2_symtab_iterator
3547 /* The internalized form of .gdb_index. */
3548 struct mapped_index
*index
;
3549 /* If non-zero, only look for symbols that match BLOCK_INDEX. */
3550 int want_specific_block
;
3551 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
3552 Unused if !WANT_SPECIFIC_BLOCK. */
3554 /* The kind of symbol we're looking for. */
3556 /* The list of CUs from the index entry of the symbol,
3557 or NULL if not found. */
3559 /* The next element in VEC to look at. */
3561 /* The number of elements in VEC, or zero if there is no match. */
3563 /* Have we seen a global version of the symbol?
3564 If so we can ignore all further global instances.
3565 This is to work around gold/15646, inefficient gold-generated
3570 /* Initialize the index symtab iterator ITER.
3571 If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols
3572 in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
3575 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3576 struct mapped_index
*index
,
3577 int want_specific_block
,
3582 iter
->index
= index
;
3583 iter
->want_specific_block
= want_specific_block
;
3584 iter
->block_index
= block_index
;
3585 iter
->domain
= domain
;
3587 iter
->global_seen
= 0;
3589 if (find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3590 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3598 /* Return the next matching CU or NULL if there are no more. */
3600 static struct dwarf2_per_cu_data
*
3601 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3603 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3605 offset_type cu_index_and_attrs
=
3606 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3607 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3608 struct dwarf2_per_cu_data
*per_cu
;
3609 int want_static
= iter
->block_index
!= GLOBAL_BLOCK
;
3610 /* This value is only valid for index versions >= 7. */
3611 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3612 gdb_index_symbol_kind symbol_kind
=
3613 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3614 /* Only check the symbol attributes if they're present.
3615 Indices prior to version 7 don't record them,
3616 and indices >= 7 may elide them for certain symbols
3617 (gold does this). */
3619 (iter
->index
->version
>= 7
3620 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3622 /* Don't crash on bad data. */
3623 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
3624 + dwarf2_per_objfile
->n_type_units
))
3626 complaint (&symfile_complaints
,
3627 _(".gdb_index entry has bad CU index"
3629 objfile_name (dwarf2_per_objfile
->objfile
));
3633 per_cu
= dw2_get_cutu (cu_index
);
3635 /* Skip if already read in. */
3636 if (per_cu
->v
.quick
->compunit_symtab
)
3639 /* Check static vs global. */
3642 if (iter
->want_specific_block
3643 && want_static
!= is_static
)
3645 /* Work around gold/15646. */
3646 if (!is_static
&& iter
->global_seen
)
3649 iter
->global_seen
= 1;
3652 /* Only check the symbol's kind if it has one. */
3655 switch (iter
->domain
)
3658 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3659 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3660 /* Some types are also in VAR_DOMAIN. */
3661 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3665 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3669 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3684 static struct compunit_symtab
*
3685 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
3686 const char *name
, domain_enum domain
)
3688 struct compunit_symtab
*stab_best
= NULL
;
3689 struct mapped_index
*index
;
3691 dw2_setup (objfile
);
3693 index
= dwarf2_per_objfile
->index_table
;
3695 /* index is NULL if OBJF_READNOW. */
3698 struct dw2_symtab_iterator iter
;
3699 struct dwarf2_per_cu_data
*per_cu
;
3701 dw2_symtab_iter_init (&iter
, index
, 1, block_index
, domain
, name
);
3703 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3705 struct symbol
*sym
, *with_opaque
= NULL
;
3706 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
);
3707 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
3708 struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
3710 sym
= block_find_symbol (block
, name
, domain
,
3711 block_find_non_opaque_type_preferred
,
3714 /* Some caution must be observed with overloaded functions
3715 and methods, since the index will not contain any overload
3716 information (but NAME might contain it). */
3719 && strcmp_iw (SYMBOL_SEARCH_NAME (sym
), name
) == 0)
3721 if (with_opaque
!= NULL
3722 && strcmp_iw (SYMBOL_SEARCH_NAME (with_opaque
), name
) == 0)
3725 /* Keep looking through other CUs. */
3733 dw2_print_stats (struct objfile
*objfile
)
3735 int i
, total
, count
;
3737 dw2_setup (objfile
);
3738 total
= dwarf2_per_objfile
->n_comp_units
+ dwarf2_per_objfile
->n_type_units
;
3740 for (i
= 0; i
< total
; ++i
)
3742 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3744 if (!per_cu
->v
.quick
->compunit_symtab
)
3747 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
3748 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3751 /* This dumps minimal information about the index.
3752 It is called via "mt print objfiles".
3753 One use is to verify .gdb_index has been loaded by the
3754 gdb.dwarf2/gdb-index.exp testcase. */
3757 dw2_dump (struct objfile
*objfile
)
3759 dw2_setup (objfile
);
3760 gdb_assert (dwarf2_per_objfile
->using_index
);
3761 printf_filtered (".gdb_index:");
3762 if (dwarf2_per_objfile
->index_table
!= NULL
)
3764 printf_filtered (" version %d\n",
3765 dwarf2_per_objfile
->index_table
->version
);
3768 printf_filtered (" faked for \"readnow\"\n");
3769 printf_filtered ("\n");
3773 dw2_relocate (struct objfile
*objfile
,
3774 const struct section_offsets
*new_offsets
,
3775 const struct section_offsets
*delta
)
3777 /* There's nothing to relocate here. */
3781 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
3782 const char *func_name
)
3784 struct mapped_index
*index
;
3786 dw2_setup (objfile
);
3788 index
= dwarf2_per_objfile
->index_table
;
3790 /* index is NULL if OBJF_READNOW. */
3793 struct dw2_symtab_iterator iter
;
3794 struct dwarf2_per_cu_data
*per_cu
;
3796 /* Note: It doesn't matter what we pass for block_index here. */
3797 dw2_symtab_iter_init (&iter
, index
, 0, GLOBAL_BLOCK
, VAR_DOMAIN
,
3800 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3801 dw2_instantiate_symtab (per_cu
);
3806 dw2_expand_all_symtabs (struct objfile
*objfile
)
3810 dw2_setup (objfile
);
3812 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3813 + dwarf2_per_objfile
->n_type_units
); ++i
)
3815 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3817 dw2_instantiate_symtab (per_cu
);
3822 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
3823 const char *fullname
)
3827 dw2_setup (objfile
);
3829 /* We don't need to consider type units here.
3830 This is only called for examining code, e.g. expand_line_sal.
3831 There can be an order of magnitude (or more) more type units
3832 than comp units, and we avoid them if we can. */
3834 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3837 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3838 struct quick_file_names
*file_data
;
3840 /* We only need to look at symtabs not already expanded. */
3841 if (per_cu
->v
.quick
->compunit_symtab
)
3844 file_data
= dw2_get_file_names (per_cu
);
3845 if (file_data
== NULL
)
3848 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3850 const char *this_fullname
= file_data
->file_names
[j
];
3852 if (filename_cmp (this_fullname
, fullname
) == 0)
3854 dw2_instantiate_symtab (per_cu
);
3862 dw2_map_matching_symbols (struct objfile
*objfile
,
3863 const char * name
, domain_enum domain
,
3865 int (*callback
) (struct block
*,
3866 struct symbol
*, void *),
3867 void *data
, symbol_compare_ftype
*match
,
3868 symbol_compare_ftype
*ordered_compare
)
3870 /* Currently unimplemented; used for Ada. The function can be called if the
3871 current language is Ada for a non-Ada objfile using GNU index. As Ada
3872 does not look for non-Ada symbols this function should just return. */
3876 dw2_expand_symtabs_matching
3877 (struct objfile
*objfile
,
3878 expand_symtabs_file_matcher_ftype
*file_matcher
,
3879 expand_symtabs_symbol_matcher_ftype
*symbol_matcher
,
3880 expand_symtabs_exp_notify_ftype
*expansion_notify
,
3881 enum search_domain kind
,
3886 struct mapped_index
*index
;
3888 dw2_setup (objfile
);
3890 /* index_table is NULL if OBJF_READNOW. */
3891 if (!dwarf2_per_objfile
->index_table
)
3893 index
= dwarf2_per_objfile
->index_table
;
3895 if (file_matcher
!= NULL
)
3897 htab_up
visited_found (htab_create_alloc (10, htab_hash_pointer
,
3899 NULL
, xcalloc
, xfree
));
3900 htab_up
visited_not_found (htab_create_alloc (10, htab_hash_pointer
,
3902 NULL
, xcalloc
, xfree
));
3904 /* The rule is CUs specify all the files, including those used by
3905 any TU, so there's no need to scan TUs here. */
3907 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3910 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3911 struct quick_file_names
*file_data
;
3916 per_cu
->v
.quick
->mark
= 0;
3918 /* We only need to look at symtabs not already expanded. */
3919 if (per_cu
->v
.quick
->compunit_symtab
)
3922 file_data
= dw2_get_file_names (per_cu
);
3923 if (file_data
== NULL
)
3926 if (htab_find (visited_not_found
.get (), file_data
) != NULL
)
3928 else if (htab_find (visited_found
.get (), file_data
) != NULL
)
3930 per_cu
->v
.quick
->mark
= 1;
3934 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3936 const char *this_real_name
;
3938 if (file_matcher (file_data
->file_names
[j
], data
, 0))
3940 per_cu
->v
.quick
->mark
= 1;
3944 /* Before we invoke realpath, which can get expensive when many
3945 files are involved, do a quick comparison of the basenames. */
3946 if (!basenames_may_differ
3947 && !file_matcher (lbasename (file_data
->file_names
[j
]),
3951 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3952 if (file_matcher (this_real_name
, data
, 0))
3954 per_cu
->v
.quick
->mark
= 1;
3959 slot
= htab_find_slot (per_cu
->v
.quick
->mark
3960 ? visited_found
.get ()
3961 : visited_not_found
.get (),
3967 for (iter
= 0; iter
< index
->symbol_table_slots
; ++iter
)
3969 offset_type idx
= 2 * iter
;
3971 offset_type
*vec
, vec_len
, vec_idx
;
3972 int global_seen
= 0;
3976 if (index
->symbol_table
[idx
] == 0 && index
->symbol_table
[idx
+ 1] == 0)
3979 name
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[idx
]);
3981 if (! (*symbol_matcher
) (name
, data
))
3984 /* The name was matched, now expand corresponding CUs that were
3986 vec
= (offset_type
*) (index
->constant_pool
3987 + MAYBE_SWAP (index
->symbol_table
[idx
+ 1]));
3988 vec_len
= MAYBE_SWAP (vec
[0]);
3989 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
3991 struct dwarf2_per_cu_data
*per_cu
;
3992 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
3993 /* This value is only valid for index versions >= 7. */
3994 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3995 gdb_index_symbol_kind symbol_kind
=
3996 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3997 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3998 /* Only check the symbol attributes if they're present.
3999 Indices prior to version 7 don't record them,
4000 and indices >= 7 may elide them for certain symbols
4001 (gold does this). */
4003 (index
->version
>= 7
4004 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
4006 /* Work around gold/15646. */
4009 if (!is_static
&& global_seen
)
4015 /* Only check the symbol's kind if it has one. */
4020 case VARIABLES_DOMAIN
:
4021 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
4024 case FUNCTIONS_DOMAIN
:
4025 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
4029 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4037 /* Don't crash on bad data. */
4038 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
4039 + dwarf2_per_objfile
->n_type_units
))
4041 complaint (&symfile_complaints
,
4042 _(".gdb_index entry has bad CU index"
4043 " [in module %s]"), objfile_name (objfile
));
4047 per_cu
= dw2_get_cutu (cu_index
);
4048 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
4050 int symtab_was_null
=
4051 (per_cu
->v
.quick
->compunit_symtab
== NULL
);
4053 dw2_instantiate_symtab (per_cu
);
4055 if (expansion_notify
!= NULL
4057 && per_cu
->v
.quick
->compunit_symtab
!= NULL
)
4059 expansion_notify (per_cu
->v
.quick
->compunit_symtab
,
4067 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
4070 static struct compunit_symtab
*
4071 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
4076 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
4077 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
4080 if (cust
->includes
== NULL
)
4083 for (i
= 0; cust
->includes
[i
]; ++i
)
4085 struct compunit_symtab
*s
= cust
->includes
[i
];
4087 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
4095 static struct compunit_symtab
*
4096 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
4097 struct bound_minimal_symbol msymbol
,
4099 struct obj_section
*section
,
4102 struct dwarf2_per_cu_data
*data
;
4103 struct compunit_symtab
*result
;
4105 dw2_setup (objfile
);
4107 if (!objfile
->psymtabs_addrmap
)
4110 data
= (struct dwarf2_per_cu_data
*) addrmap_find (objfile
->psymtabs_addrmap
,
4115 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
4116 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
4117 paddress (get_objfile_arch (objfile
), pc
));
4120 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
),
4122 gdb_assert (result
!= NULL
);
4127 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
4128 void *data
, int need_fullname
)
4131 htab_up
visited (htab_create_alloc (10, htab_hash_pointer
, htab_eq_pointer
,
4132 NULL
, xcalloc
, xfree
));
4134 dw2_setup (objfile
);
4136 /* The rule is CUs specify all the files, including those used by
4137 any TU, so there's no need to scan TUs here.
4138 We can ignore file names coming from already-expanded CUs. */
4140 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4142 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4144 if (per_cu
->v
.quick
->compunit_symtab
)
4146 void **slot
= htab_find_slot (visited
.get (),
4147 per_cu
->v
.quick
->file_names
,
4150 *slot
= per_cu
->v
.quick
->file_names
;
4154 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4157 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
4158 struct quick_file_names
*file_data
;
4161 /* We only need to look at symtabs not already expanded. */
4162 if (per_cu
->v
.quick
->compunit_symtab
)
4165 file_data
= dw2_get_file_names (per_cu
);
4166 if (file_data
== NULL
)
4169 slot
= htab_find_slot (visited
.get (), file_data
, INSERT
);
4172 /* Already visited. */
4177 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
4179 const char *this_real_name
;
4182 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
4184 this_real_name
= NULL
;
4185 (*fun
) (file_data
->file_names
[j
], this_real_name
, data
);
4191 dw2_has_symbols (struct objfile
*objfile
)
4196 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
4199 dw2_find_last_source_symtab
,
4200 dw2_forget_cached_source_info
,
4201 dw2_map_symtabs_matching_filename
,
4206 dw2_expand_symtabs_for_function
,
4207 dw2_expand_all_symtabs
,
4208 dw2_expand_symtabs_with_fullname
,
4209 dw2_map_matching_symbols
,
4210 dw2_expand_symtabs_matching
,
4211 dw2_find_pc_sect_compunit_symtab
,
4212 dw2_map_symbol_filenames
4215 /* Initialize for reading DWARF for this objfile. Return 0 if this
4216 file will use psymtabs, or 1 if using the GNU index. */
4219 dwarf2_initialize_objfile (struct objfile
*objfile
)
4221 /* If we're about to read full symbols, don't bother with the
4222 indices. In this case we also don't care if some other debug
4223 format is making psymtabs, because they are all about to be
4225 if ((objfile
->flags
& OBJF_READNOW
))
4229 dwarf2_per_objfile
->using_index
= 1;
4230 create_all_comp_units (objfile
);
4231 create_all_type_units (objfile
);
4232 dwarf2_per_objfile
->quick_file_names_table
=
4233 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
4235 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
4236 + dwarf2_per_objfile
->n_type_units
); ++i
)
4238 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4240 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4241 struct dwarf2_per_cu_quick_data
);
4244 /* Return 1 so that gdb sees the "quick" functions. However,
4245 these functions will be no-ops because we will have expanded
4250 if (dwarf2_read_index (objfile
))
4258 /* Build a partial symbol table. */
4261 dwarf2_build_psymtabs (struct objfile
*objfile
)
4264 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
4266 init_psymbol_list (objfile
, 1024);
4271 /* This isn't really ideal: all the data we allocate on the
4272 objfile's obstack is still uselessly kept around. However,
4273 freeing it seems unsafe. */
4274 psymtab_discarder
psymtabs (objfile
);
4275 dwarf2_build_psymtabs_hard (objfile
);
4278 CATCH (except
, RETURN_MASK_ERROR
)
4280 exception_print (gdb_stderr
, except
);
4285 /* Return the total length of the CU described by HEADER. */
4288 get_cu_length (const struct comp_unit_head
*header
)
4290 return header
->initial_length_size
+ header
->length
;
4293 /* Return TRUE if OFFSET is within CU_HEADER. */
4296 offset_in_cu_p (const struct comp_unit_head
*cu_header
, sect_offset offset
)
4298 sect_offset bottom
= { cu_header
->offset
.sect_off
};
4299 sect_offset top
= { cu_header
->offset
.sect_off
+ get_cu_length (cu_header
) };
4301 return (offset
.sect_off
>= bottom
.sect_off
&& offset
.sect_off
< top
.sect_off
);
4304 /* Find the base address of the compilation unit for range lists and
4305 location lists. It will normally be specified by DW_AT_low_pc.
4306 In DWARF-3 draft 4, the base address could be overridden by
4307 DW_AT_entry_pc. It's been removed, but GCC still uses this for
4308 compilation units with discontinuous ranges. */
4311 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
4313 struct attribute
*attr
;
4316 cu
->base_address
= 0;
4318 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
4321 cu
->base_address
= attr_value_as_address (attr
);
4326 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4329 cu
->base_address
= attr_value_as_address (attr
);
4335 /* Read in the comp unit header information from the debug_info at info_ptr.
4336 NOTE: This leaves members offset, first_die_offset to be filled in
4339 static const gdb_byte
*
4340 read_comp_unit_head (struct comp_unit_head
*cu_header
,
4341 const gdb_byte
*info_ptr
, bfd
*abfd
)
4344 unsigned int bytes_read
;
4346 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
4347 cu_header
->initial_length_size
= bytes_read
;
4348 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
4349 info_ptr
+= bytes_read
;
4350 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
4352 cu_header
->abbrev_offset
.sect_off
= read_offset (abfd
, info_ptr
, cu_header
,
4354 info_ptr
+= bytes_read
;
4355 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
4357 signed_addr
= bfd_get_sign_extend_vma (abfd
);
4358 if (signed_addr
< 0)
4359 internal_error (__FILE__
, __LINE__
,
4360 _("read_comp_unit_head: dwarf from non elf file"));
4361 cu_header
->signed_addr_p
= signed_addr
;
4366 /* Helper function that returns the proper abbrev section for
4369 static struct dwarf2_section_info
*
4370 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
4372 struct dwarf2_section_info
*abbrev
;
4374 if (this_cu
->is_dwz
)
4375 abbrev
= &dwarf2_get_dwz_file ()->abbrev
;
4377 abbrev
= &dwarf2_per_objfile
->abbrev
;
4382 /* Subroutine of read_and_check_comp_unit_head and
4383 read_and_check_type_unit_head to simplify them.
4384 Perform various error checking on the header. */
4387 error_check_comp_unit_head (struct comp_unit_head
*header
,
4388 struct dwarf2_section_info
*section
,
4389 struct dwarf2_section_info
*abbrev_section
)
4391 const char *filename
= get_section_file_name (section
);
4393 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
4394 error (_("Dwarf Error: wrong version in compilation unit header "
4395 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
4398 if (header
->abbrev_offset
.sect_off
4399 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
4400 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
4401 "(offset 0x%lx + 6) [in module %s]"),
4402 (long) header
->abbrev_offset
.sect_off
, (long) header
->offset
.sect_off
,
4405 /* Cast to unsigned long to use 64-bit arithmetic when possible to
4406 avoid potential 32-bit overflow. */
4407 if (((unsigned long) header
->offset
.sect_off
+ get_cu_length (header
))
4409 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
4410 "(offset 0x%lx + 0) [in module %s]"),
4411 (long) header
->length
, (long) header
->offset
.sect_off
,
4415 /* Read in a CU/TU header and perform some basic error checking.
4416 The contents of the header are stored in HEADER.
4417 The result is a pointer to the start of the first DIE. */
4419 static const gdb_byte
*
4420 read_and_check_comp_unit_head (struct comp_unit_head
*header
,
4421 struct dwarf2_section_info
*section
,
4422 struct dwarf2_section_info
*abbrev_section
,
4423 const gdb_byte
*info_ptr
,
4424 int is_debug_types_section
)
4426 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
4427 bfd
*abfd
= get_section_bfd_owner (section
);
4429 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4431 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
4433 /* If we're reading a type unit, skip over the signature and
4434 type_offset fields. */
4435 if (is_debug_types_section
)
4436 info_ptr
+= 8 /*signature*/ + header
->offset_size
;
4438 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4440 error_check_comp_unit_head (header
, section
, abbrev_section
);
4445 /* Read in the types comp unit header information from .debug_types entry at
4446 types_ptr. The result is a pointer to one past the end of the header. */
4448 static const gdb_byte
*
4449 read_and_check_type_unit_head (struct comp_unit_head
*header
,
4450 struct dwarf2_section_info
*section
,
4451 struct dwarf2_section_info
*abbrev_section
,
4452 const gdb_byte
*info_ptr
,
4453 ULONGEST
*signature
,
4454 cu_offset
*type_offset_in_tu
)
4456 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
4457 bfd
*abfd
= get_section_bfd_owner (section
);
4459 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4461 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
4463 /* If we're reading a type unit, skip over the signature and
4464 type_offset fields. */
4465 if (signature
!= NULL
)
4466 *signature
= read_8_bytes (abfd
, info_ptr
);
4468 if (type_offset_in_tu
!= NULL
)
4469 type_offset_in_tu
->cu_off
= read_offset_1 (abfd
, info_ptr
,
4470 header
->offset_size
);
4471 info_ptr
+= header
->offset_size
;
4473 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4475 error_check_comp_unit_head (header
, section
, abbrev_section
);
4480 /* Fetch the abbreviation table offset from a comp or type unit header. */
4483 read_abbrev_offset (struct dwarf2_section_info
*section
,
4486 bfd
*abfd
= get_section_bfd_owner (section
);
4487 const gdb_byte
*info_ptr
;
4488 unsigned int initial_length_size
, offset_size
;
4489 sect_offset abbrev_offset
;
4491 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
4492 info_ptr
= section
->buffer
+ offset
.sect_off
;
4493 read_initial_length (abfd
, info_ptr
, &initial_length_size
);
4494 offset_size
= initial_length_size
== 4 ? 4 : 8;
4495 info_ptr
+= initial_length_size
+ 2 /*version*/;
4496 abbrev_offset
.sect_off
= read_offset_1 (abfd
, info_ptr
, offset_size
);
4497 return abbrev_offset
;
4500 /* Allocate a new partial symtab for file named NAME and mark this new
4501 partial symtab as being an include of PST. */
4504 dwarf2_create_include_psymtab (const char *name
, struct partial_symtab
*pst
,
4505 struct objfile
*objfile
)
4507 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
4509 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
4511 /* It shares objfile->objfile_obstack. */
4512 subpst
->dirname
= pst
->dirname
;
4515 subpst
->textlow
= 0;
4516 subpst
->texthigh
= 0;
4518 subpst
->dependencies
4519 = XOBNEW (&objfile
->objfile_obstack
, struct partial_symtab
*);
4520 subpst
->dependencies
[0] = pst
;
4521 subpst
->number_of_dependencies
= 1;
4523 subpst
->globals_offset
= 0;
4524 subpst
->n_global_syms
= 0;
4525 subpst
->statics_offset
= 0;
4526 subpst
->n_static_syms
= 0;
4527 subpst
->compunit_symtab
= NULL
;
4528 subpst
->read_symtab
= pst
->read_symtab
;
4531 /* No private part is necessary for include psymtabs. This property
4532 can be used to differentiate between such include psymtabs and
4533 the regular ones. */
4534 subpst
->read_symtab_private
= NULL
;
4537 /* Read the Line Number Program data and extract the list of files
4538 included by the source file represented by PST. Build an include
4539 partial symtab for each of these included files. */
4542 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
4543 struct die_info
*die
,
4544 struct partial_symtab
*pst
)
4546 struct line_header
*lh
= NULL
;
4547 struct attribute
*attr
;
4549 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
4551 lh
= dwarf_decode_line_header (DW_UNSND (attr
), cu
);
4553 return; /* No linetable, so no includes. */
4555 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
4556 dwarf_decode_lines (lh
, pst
->dirname
, cu
, pst
, pst
->textlow
, 1);
4558 free_line_header (lh
);
4562 hash_signatured_type (const void *item
)
4564 const struct signatured_type
*sig_type
4565 = (const struct signatured_type
*) item
;
4567 /* This drops the top 32 bits of the signature, but is ok for a hash. */
4568 return sig_type
->signature
;
4572 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
4574 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
4575 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
4577 return lhs
->signature
== rhs
->signature
;
4580 /* Allocate a hash table for signatured types. */
4583 allocate_signatured_type_table (struct objfile
*objfile
)
4585 return htab_create_alloc_ex (41,
4586 hash_signatured_type
,
4589 &objfile
->objfile_obstack
,
4590 hashtab_obstack_allocate
,
4591 dummy_obstack_deallocate
);
4594 /* A helper function to add a signatured type CU to a table. */
4597 add_signatured_type_cu_to_table (void **slot
, void *datum
)
4599 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
4600 struct signatured_type
***datap
= (struct signatured_type
***) datum
;
4608 /* A helper for create_debug_types_hash_table. Read types from SECTION
4609 and fill them into TYPES_HTAB. */
4612 create_debug_type_hash_table (struct dwo_file
*dwo_file
,
4613 dwarf2_section_info
*section
, htab_t
&types_htab
)
4615 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4616 struct dwarf2_section_info
*abbrev_section
;
4618 const gdb_byte
*info_ptr
, *end_ptr
;
4620 abbrev_section
= (dwo_file
!= NULL
4621 ? &dwo_file
->sections
.abbrev
4622 : &dwarf2_per_objfile
->abbrev
);
4624 if (dwarf_read_debug
)
4625 fprintf_unfiltered (gdb_stdlog
, "Reading .debug_types%s for %s:\n",
4626 dwo_file
? ".dwo" : "",
4627 get_section_file_name (abbrev_section
));
4629 dwarf2_read_section (objfile
, section
);
4630 info_ptr
= section
->buffer
;
4632 if (info_ptr
== NULL
)
4635 /* We can't set abfd until now because the section may be empty or
4636 not present, in which case the bfd is unknown. */
4637 abfd
= get_section_bfd_owner (section
);
4639 /* We don't use init_cutu_and_read_dies_simple, or some such, here
4640 because we don't need to read any dies: the signature is in the
4643 end_ptr
= info_ptr
+ section
->size
;
4644 while (info_ptr
< end_ptr
)
4647 cu_offset type_offset_in_tu
;
4649 struct signatured_type
*sig_type
;
4650 struct dwo_unit
*dwo_tu
;
4652 const gdb_byte
*ptr
= info_ptr
;
4653 struct comp_unit_head header
;
4654 unsigned int length
;
4656 offset
.sect_off
= ptr
- section
->buffer
;
4658 /* We need to read the type's signature in order to build the hash
4659 table, but we don't need anything else just yet. */
4661 ptr
= read_and_check_type_unit_head (&header
, section
,
4662 abbrev_section
, ptr
,
4663 &signature
, &type_offset_in_tu
);
4665 length
= get_cu_length (&header
);
4667 /* Skip dummy type units. */
4668 if (ptr
>= info_ptr
+ length
4669 || peek_abbrev_code (abfd
, ptr
) == 0)
4675 if (types_htab
== NULL
)
4678 types_htab
= allocate_dwo_unit_table (objfile
);
4680 types_htab
= allocate_signatured_type_table (objfile
);
4686 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4688 dwo_tu
->dwo_file
= dwo_file
;
4689 dwo_tu
->signature
= signature
;
4690 dwo_tu
->type_offset_in_tu
= type_offset_in_tu
;
4691 dwo_tu
->section
= section
;
4692 dwo_tu
->offset
= offset
;
4693 dwo_tu
->length
= length
;
4697 /* N.B.: type_offset is not usable if this type uses a DWO file.
4698 The real type_offset is in the DWO file. */
4700 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4701 struct signatured_type
);
4702 sig_type
->signature
= signature
;
4703 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
4704 sig_type
->per_cu
.objfile
= objfile
;
4705 sig_type
->per_cu
.is_debug_types
= 1;
4706 sig_type
->per_cu
.section
= section
;
4707 sig_type
->per_cu
.offset
= offset
;
4708 sig_type
->per_cu
.length
= length
;
4711 slot
= htab_find_slot (types_htab
,
4712 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
4714 gdb_assert (slot
!= NULL
);
4717 sect_offset dup_offset
;
4721 const struct dwo_unit
*dup_tu
4722 = (const struct dwo_unit
*) *slot
;
4724 dup_offset
= dup_tu
->offset
;
4728 const struct signatured_type
*dup_tu
4729 = (const struct signatured_type
*) *slot
;
4731 dup_offset
= dup_tu
->per_cu
.offset
;
4734 complaint (&symfile_complaints
,
4735 _("debug type entry at offset 0x%x is duplicate to"
4736 " the entry at offset 0x%x, signature %s"),
4737 offset
.sect_off
, dup_offset
.sect_off
,
4738 hex_string (signature
));
4740 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
4742 if (dwarf_read_debug
> 1)
4743 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature %s\n",
4745 hex_string (signature
));
4751 /* Create the hash table of all entries in the .debug_types
4752 (or .debug_types.dwo) section(s).
4753 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
4754 otherwise it is NULL.
4756 The result is a pointer to the hash table or NULL if there are no types.
4758 Note: This function processes DWO files only, not DWP files. */
4761 create_debug_types_hash_table (struct dwo_file
*dwo_file
,
4762 VEC (dwarf2_section_info_def
) *types
,
4766 struct dwarf2_section_info
*section
;
4768 if (VEC_empty (dwarf2_section_info_def
, types
))
4772 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
4774 create_debug_type_hash_table (dwo_file
, section
, types_htab
);
4777 /* Create the hash table of all entries in the .debug_types section,
4778 and initialize all_type_units.
4779 The result is zero if there is an error (e.g. missing .debug_types section),
4780 otherwise non-zero. */
4783 create_all_type_units (struct objfile
*objfile
)
4785 htab_t types_htab
= NULL
;
4786 struct signatured_type
**iter
;
4788 create_debug_types_hash_table (NULL
, dwarf2_per_objfile
->types
, types_htab
);
4789 if (types_htab
== NULL
)
4791 dwarf2_per_objfile
->signatured_types
= NULL
;
4795 dwarf2_per_objfile
->signatured_types
= types_htab
;
4797 dwarf2_per_objfile
->n_type_units
4798 = dwarf2_per_objfile
->n_allocated_type_units
4799 = htab_elements (types_htab
);
4800 dwarf2_per_objfile
->all_type_units
=
4801 XNEWVEC (struct signatured_type
*, dwarf2_per_objfile
->n_type_units
);
4802 iter
= &dwarf2_per_objfile
->all_type_units
[0];
4803 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
4804 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
4805 == dwarf2_per_objfile
->n_type_units
);
4810 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
4811 If SLOT is non-NULL, it is the entry to use in the hash table.
4812 Otherwise we find one. */
4814 static struct signatured_type
*
4815 add_type_unit (ULONGEST sig
, void **slot
)
4817 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4818 int n_type_units
= dwarf2_per_objfile
->n_type_units
;
4819 struct signatured_type
*sig_type
;
4821 gdb_assert (n_type_units
<= dwarf2_per_objfile
->n_allocated_type_units
);
4823 if (n_type_units
> dwarf2_per_objfile
->n_allocated_type_units
)
4825 if (dwarf2_per_objfile
->n_allocated_type_units
== 0)
4826 dwarf2_per_objfile
->n_allocated_type_units
= 1;
4827 dwarf2_per_objfile
->n_allocated_type_units
*= 2;
4828 dwarf2_per_objfile
->all_type_units
4829 = XRESIZEVEC (struct signatured_type
*,
4830 dwarf2_per_objfile
->all_type_units
,
4831 dwarf2_per_objfile
->n_allocated_type_units
);
4832 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
4834 dwarf2_per_objfile
->n_type_units
= n_type_units
;
4836 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4837 struct signatured_type
);
4838 dwarf2_per_objfile
->all_type_units
[n_type_units
- 1] = sig_type
;
4839 sig_type
->signature
= sig
;
4840 sig_type
->per_cu
.is_debug_types
= 1;
4841 if (dwarf2_per_objfile
->using_index
)
4843 sig_type
->per_cu
.v
.quick
=
4844 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4845 struct dwarf2_per_cu_quick_data
);
4850 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4853 gdb_assert (*slot
== NULL
);
4855 /* The rest of sig_type must be filled in by the caller. */
4859 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
4860 Fill in SIG_ENTRY with DWO_ENTRY. */
4863 fill_in_sig_entry_from_dwo_entry (struct objfile
*objfile
,
4864 struct signatured_type
*sig_entry
,
4865 struct dwo_unit
*dwo_entry
)
4867 /* Make sure we're not clobbering something we don't expect to. */
4868 gdb_assert (! sig_entry
->per_cu
.queued
);
4869 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
4870 if (dwarf2_per_objfile
->using_index
)
4872 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
4873 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
4876 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
4877 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
4878 gdb_assert (sig_entry
->type_offset_in_section
.sect_off
== 0);
4879 gdb_assert (sig_entry
->type_unit_group
== NULL
);
4880 gdb_assert (sig_entry
->dwo_unit
== NULL
);
4882 sig_entry
->per_cu
.section
= dwo_entry
->section
;
4883 sig_entry
->per_cu
.offset
= dwo_entry
->offset
;
4884 sig_entry
->per_cu
.length
= dwo_entry
->length
;
4885 sig_entry
->per_cu
.reading_dwo_directly
= 1;
4886 sig_entry
->per_cu
.objfile
= objfile
;
4887 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
4888 sig_entry
->dwo_unit
= dwo_entry
;
4891 /* Subroutine of lookup_signatured_type.
4892 If we haven't read the TU yet, create the signatured_type data structure
4893 for a TU to be read in directly from a DWO file, bypassing the stub.
4894 This is the "Stay in DWO Optimization": When there is no DWP file and we're
4895 using .gdb_index, then when reading a CU we want to stay in the DWO file
4896 containing that CU. Otherwise we could end up reading several other DWO
4897 files (due to comdat folding) to process the transitive closure of all the
4898 mentioned TUs, and that can be slow. The current DWO file will have every
4899 type signature that it needs.
4900 We only do this for .gdb_index because in the psymtab case we already have
4901 to read all the DWOs to build the type unit groups. */
4903 static struct signatured_type
*
4904 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4906 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4907 struct dwo_file
*dwo_file
;
4908 struct dwo_unit find_dwo_entry
, *dwo_entry
;
4909 struct signatured_type find_sig_entry
, *sig_entry
;
4912 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
4914 /* If TU skeletons have been removed then we may not have read in any
4916 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4918 dwarf2_per_objfile
->signatured_types
4919 = allocate_signatured_type_table (objfile
);
4922 /* We only ever need to read in one copy of a signatured type.
4923 Use the global signatured_types array to do our own comdat-folding
4924 of types. If this is the first time we're reading this TU, and
4925 the TU has an entry in .gdb_index, replace the recorded data from
4926 .gdb_index with this TU. */
4928 find_sig_entry
.signature
= sig
;
4929 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4930 &find_sig_entry
, INSERT
);
4931 sig_entry
= (struct signatured_type
*) *slot
;
4933 /* We can get here with the TU already read, *or* in the process of being
4934 read. Don't reassign the global entry to point to this DWO if that's
4935 the case. Also note that if the TU is already being read, it may not
4936 have come from a DWO, the program may be a mix of Fission-compiled
4937 code and non-Fission-compiled code. */
4939 /* Have we already tried to read this TU?
4940 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
4941 needn't exist in the global table yet). */
4942 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
4945 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
4946 dwo_unit of the TU itself. */
4947 dwo_file
= cu
->dwo_unit
->dwo_file
;
4949 /* Ok, this is the first time we're reading this TU. */
4950 if (dwo_file
->tus
== NULL
)
4952 find_dwo_entry
.signature
= sig
;
4953 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_entry
);
4954 if (dwo_entry
== NULL
)
4957 /* If the global table doesn't have an entry for this TU, add one. */
4958 if (sig_entry
== NULL
)
4959 sig_entry
= add_type_unit (sig
, slot
);
4961 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
4962 sig_entry
->per_cu
.tu_read
= 1;
4966 /* Subroutine of lookup_signatured_type.
4967 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
4968 then try the DWP file. If the TU stub (skeleton) has been removed then
4969 it won't be in .gdb_index. */
4971 static struct signatured_type
*
4972 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4974 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4975 struct dwp_file
*dwp_file
= get_dwp_file ();
4976 struct dwo_unit
*dwo_entry
;
4977 struct signatured_type find_sig_entry
, *sig_entry
;
4980 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
4981 gdb_assert (dwp_file
!= NULL
);
4983 /* If TU skeletons have been removed then we may not have read in any
4985 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4987 dwarf2_per_objfile
->signatured_types
4988 = allocate_signatured_type_table (objfile
);
4991 find_sig_entry
.signature
= sig
;
4992 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4993 &find_sig_entry
, INSERT
);
4994 sig_entry
= (struct signatured_type
*) *slot
;
4996 /* Have we already tried to read this TU?
4997 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
4998 needn't exist in the global table yet). */
4999 if (sig_entry
!= NULL
)
5002 if (dwp_file
->tus
== NULL
)
5004 dwo_entry
= lookup_dwo_unit_in_dwp (dwp_file
, NULL
,
5005 sig
, 1 /* is_debug_types */);
5006 if (dwo_entry
== NULL
)
5009 sig_entry
= add_type_unit (sig
, slot
);
5010 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
5015 /* Lookup a signature based type for DW_FORM_ref_sig8.
5016 Returns NULL if signature SIG is not present in the table.
5017 It is up to the caller to complain about this. */
5019 static struct signatured_type
*
5020 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
5023 && dwarf2_per_objfile
->using_index
)
5025 /* We're in a DWO/DWP file, and we're using .gdb_index.
5026 These cases require special processing. */
5027 if (get_dwp_file () == NULL
)
5028 return lookup_dwo_signatured_type (cu
, sig
);
5030 return lookup_dwp_signatured_type (cu
, sig
);
5034 struct signatured_type find_entry
, *entry
;
5036 if (dwarf2_per_objfile
->signatured_types
== NULL
)
5038 find_entry
.signature
= sig
;
5039 entry
= ((struct signatured_type
*)
5040 htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
));
5045 /* Low level DIE reading support. */
5047 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
5050 init_cu_die_reader (struct die_reader_specs
*reader
,
5051 struct dwarf2_cu
*cu
,
5052 struct dwarf2_section_info
*section
,
5053 struct dwo_file
*dwo_file
)
5055 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
5056 reader
->abfd
= get_section_bfd_owner (section
);
5058 reader
->dwo_file
= dwo_file
;
5059 reader
->die_section
= section
;
5060 reader
->buffer
= section
->buffer
;
5061 reader
->buffer_end
= section
->buffer
+ section
->size
;
5062 reader
->comp_dir
= NULL
;
5065 /* Subroutine of init_cutu_and_read_dies to simplify it.
5066 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
5067 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
5070 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
5071 from it to the DIE in the DWO. If NULL we are skipping the stub.
5072 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
5073 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
5074 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
5075 STUB_COMP_DIR may be non-NULL.
5076 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
5077 are filled in with the info of the DIE from the DWO file.
5078 ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies
5079 provided an abbrev table to use.
5080 The result is non-zero if a valid (non-dummy) DIE was found. */
5083 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
5084 struct dwo_unit
*dwo_unit
,
5085 int abbrev_table_provided
,
5086 struct die_info
*stub_comp_unit_die
,
5087 const char *stub_comp_dir
,
5088 struct die_reader_specs
*result_reader
,
5089 const gdb_byte
**result_info_ptr
,
5090 struct die_info
**result_comp_unit_die
,
5091 int *result_has_children
)
5093 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5094 struct dwarf2_cu
*cu
= this_cu
->cu
;
5095 struct dwarf2_section_info
*section
;
5097 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5098 ULONGEST signature
; /* Or dwo_id. */
5099 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
5100 int i
,num_extra_attrs
;
5101 struct dwarf2_section_info
*dwo_abbrev_section
;
5102 struct attribute
*attr
;
5103 struct die_info
*comp_unit_die
;
5105 /* At most one of these may be provided. */
5106 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
5108 /* These attributes aren't processed until later:
5109 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
5110 DW_AT_comp_dir is used now, to find the DWO file, but it is also
5111 referenced later. However, these attributes are found in the stub
5112 which we won't have later. In order to not impose this complication
5113 on the rest of the code, we read them here and copy them to the
5122 if (stub_comp_unit_die
!= NULL
)
5124 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
5126 if (! this_cu
->is_debug_types
)
5127 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
5128 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
5129 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
5130 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
5131 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
5133 /* There should be a DW_AT_addr_base attribute here (if needed).
5134 We need the value before we can process DW_FORM_GNU_addr_index. */
5136 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
5138 cu
->addr_base
= DW_UNSND (attr
);
5140 /* There should be a DW_AT_ranges_base attribute here (if needed).
5141 We need the value before we can process DW_AT_ranges. */
5142 cu
->ranges_base
= 0;
5143 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
5145 cu
->ranges_base
= DW_UNSND (attr
);
5147 else if (stub_comp_dir
!= NULL
)
5149 /* Reconstruct the comp_dir attribute to simplify the code below. */
5150 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
5151 comp_dir
->name
= DW_AT_comp_dir
;
5152 comp_dir
->form
= DW_FORM_string
;
5153 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
5154 DW_STRING (comp_dir
) = stub_comp_dir
;
5157 /* Set up for reading the DWO CU/TU. */
5158 cu
->dwo_unit
= dwo_unit
;
5159 section
= dwo_unit
->section
;
5160 dwarf2_read_section (objfile
, section
);
5161 abfd
= get_section_bfd_owner (section
);
5162 begin_info_ptr
= info_ptr
= section
->buffer
+ dwo_unit
->offset
.sect_off
;
5163 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
5164 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
);
5166 if (this_cu
->is_debug_types
)
5168 ULONGEST header_signature
;
5169 cu_offset type_offset_in_tu
;
5170 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
5172 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
5176 &type_offset_in_tu
);
5177 /* This is not an assert because it can be caused by bad debug info. */
5178 if (sig_type
->signature
!= header_signature
)
5180 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
5181 " TU at offset 0x%x [in module %s]"),
5182 hex_string (sig_type
->signature
),
5183 hex_string (header_signature
),
5184 dwo_unit
->offset
.sect_off
,
5185 bfd_get_filename (abfd
));
5187 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5188 /* For DWOs coming from DWP files, we don't know the CU length
5189 nor the type's offset in the TU until now. */
5190 dwo_unit
->length
= get_cu_length (&cu
->header
);
5191 dwo_unit
->type_offset_in_tu
= type_offset_in_tu
;
5193 /* Establish the type offset that can be used to lookup the type.
5194 For DWO files, we don't know it until now. */
5195 sig_type
->type_offset_in_section
.sect_off
=
5196 dwo_unit
->offset
.sect_off
+ dwo_unit
->type_offset_in_tu
.cu_off
;
5200 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5203 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5204 /* For DWOs coming from DWP files, we don't know the CU length
5206 dwo_unit
->length
= get_cu_length (&cu
->header
);
5209 /* Replace the CU's original abbrev table with the DWO's.
5210 Reminder: We can't read the abbrev table until we've read the header. */
5211 if (abbrev_table_provided
)
5213 /* Don't free the provided abbrev table, the caller of
5214 init_cutu_and_read_dies owns it. */
5215 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5216 /* Ensure the DWO abbrev table gets freed. */
5217 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5221 dwarf2_free_abbrev_table (cu
);
5222 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5223 /* Leave any existing abbrev table cleanup as is. */
5226 /* Read in the die, but leave space to copy over the attributes
5227 from the stub. This has the benefit of simplifying the rest of
5228 the code - all the work to maintain the illusion of a single
5229 DW_TAG_{compile,type}_unit DIE is done here. */
5230 num_extra_attrs
= ((stmt_list
!= NULL
)
5234 + (comp_dir
!= NULL
));
5235 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
5236 result_has_children
, num_extra_attrs
);
5238 /* Copy over the attributes from the stub to the DIE we just read in. */
5239 comp_unit_die
= *result_comp_unit_die
;
5240 i
= comp_unit_die
->num_attrs
;
5241 if (stmt_list
!= NULL
)
5242 comp_unit_die
->attrs
[i
++] = *stmt_list
;
5244 comp_unit_die
->attrs
[i
++] = *low_pc
;
5245 if (high_pc
!= NULL
)
5246 comp_unit_die
->attrs
[i
++] = *high_pc
;
5248 comp_unit_die
->attrs
[i
++] = *ranges
;
5249 if (comp_dir
!= NULL
)
5250 comp_unit_die
->attrs
[i
++] = *comp_dir
;
5251 comp_unit_die
->num_attrs
+= num_extra_attrs
;
5253 if (dwarf_die_debug
)
5255 fprintf_unfiltered (gdb_stdlog
,
5256 "Read die from %s@0x%x of %s:\n",
5257 get_section_name (section
),
5258 (unsigned) (begin_info_ptr
- section
->buffer
),
5259 bfd_get_filename (abfd
));
5260 dump_die (comp_unit_die
, dwarf_die_debug
);
5263 /* Save the comp_dir attribute. If there is no DWP file then we'll read
5264 TUs by skipping the stub and going directly to the entry in the DWO file.
5265 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
5266 to get it via circuitous means. Blech. */
5267 if (comp_dir
!= NULL
)
5268 result_reader
->comp_dir
= DW_STRING (comp_dir
);
5270 /* Skip dummy compilation units. */
5271 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
5272 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5275 *result_info_ptr
= info_ptr
;
5279 /* Subroutine of init_cutu_and_read_dies to simplify it.
5280 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
5281 Returns NULL if the specified DWO unit cannot be found. */
5283 static struct dwo_unit
*
5284 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
5285 struct die_info
*comp_unit_die
)
5287 struct dwarf2_cu
*cu
= this_cu
->cu
;
5288 struct attribute
*attr
;
5290 struct dwo_unit
*dwo_unit
;
5291 const char *comp_dir
, *dwo_name
;
5293 gdb_assert (cu
!= NULL
);
5295 /* Yeah, we look dwo_name up again, but it simplifies the code. */
5296 dwo_name
= dwarf2_string_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5297 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
5299 if (this_cu
->is_debug_types
)
5301 struct signatured_type
*sig_type
;
5303 /* Since this_cu is the first member of struct signatured_type,
5304 we can go from a pointer to one to a pointer to the other. */
5305 sig_type
= (struct signatured_type
*) this_cu
;
5306 signature
= sig_type
->signature
;
5307 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
5311 struct attribute
*attr
;
5313 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
5315 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
5317 dwo_name
, objfile_name (this_cu
->objfile
));
5318 signature
= DW_UNSND (attr
);
5319 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
5326 /* Subroutine of init_cutu_and_read_dies to simplify it.
5327 See it for a description of the parameters.
5328 Read a TU directly from a DWO file, bypassing the stub.
5330 Note: This function could be a little bit simpler if we shared cleanups
5331 with our caller, init_cutu_and_read_dies. That's generally a fragile thing
5332 to do, so we keep this function self-contained. Or we could move this
5333 into our caller, but it's complex enough already. */
5336 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
5337 int use_existing_cu
, int keep
,
5338 die_reader_func_ftype
*die_reader_func
,
5341 struct dwarf2_cu
*cu
;
5342 struct signatured_type
*sig_type
;
5343 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5344 struct die_reader_specs reader
;
5345 const gdb_byte
*info_ptr
;
5346 struct die_info
*comp_unit_die
;
5349 /* Verify we can do the following downcast, and that we have the
5351 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
5352 sig_type
= (struct signatured_type
*) this_cu
;
5353 gdb_assert (sig_type
->dwo_unit
!= NULL
);
5355 cleanups
= make_cleanup (null_cleanup
, NULL
);
5357 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5359 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
5361 /* There's no need to do the rereading_dwo_cu handling that
5362 init_cutu_and_read_dies does since we don't read the stub. */
5366 /* If !use_existing_cu, this_cu->cu must be NULL. */
5367 gdb_assert (this_cu
->cu
== NULL
);
5368 cu
= XNEW (struct dwarf2_cu
);
5369 init_one_comp_unit (cu
, this_cu
);
5370 /* If an error occurs while loading, release our storage. */
5371 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5374 /* A future optimization, if needed, would be to use an existing
5375 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
5376 could share abbrev tables. */
5378 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
5379 0 /* abbrev_table_provided */,
5380 NULL
/* stub_comp_unit_die */,
5381 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
5383 &comp_unit_die
, &has_children
) == 0)
5386 do_cleanups (cleanups
);
5390 /* All the "real" work is done here. */
5391 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5393 /* This duplicates the code in init_cutu_and_read_dies,
5394 but the alternative is making the latter more complex.
5395 This function is only for the special case of using DWO files directly:
5396 no point in overly complicating the general case just to handle this. */
5397 if (free_cu_cleanup
!= NULL
)
5401 /* We've successfully allocated this compilation unit. Let our
5402 caller clean it up when finished with it. */
5403 discard_cleanups (free_cu_cleanup
);
5405 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5406 So we have to manually free the abbrev table. */
5407 dwarf2_free_abbrev_table (cu
);
5409 /* Link this CU into read_in_chain. */
5410 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5411 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5414 do_cleanups (free_cu_cleanup
);
5417 do_cleanups (cleanups
);
5420 /* Initialize a CU (or TU) and read its DIEs.
5421 If the CU defers to a DWO file, read the DWO file as well.
5423 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
5424 Otherwise the table specified in the comp unit header is read in and used.
5425 This is an optimization for when we already have the abbrev table.
5427 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
5428 Otherwise, a new CU is allocated with xmalloc.
5430 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
5431 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
5433 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5434 linker) then DIE_READER_FUNC will not get called. */
5437 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
5438 struct abbrev_table
*abbrev_table
,
5439 int use_existing_cu
, int keep
,
5440 die_reader_func_ftype
*die_reader_func
,
5443 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5444 struct dwarf2_section_info
*section
= this_cu
->section
;
5445 bfd
*abfd
= get_section_bfd_owner (section
);
5446 struct dwarf2_cu
*cu
;
5447 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5448 struct die_reader_specs reader
;
5449 struct die_info
*comp_unit_die
;
5451 struct attribute
*attr
;
5452 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5453 struct signatured_type
*sig_type
= NULL
;
5454 struct dwarf2_section_info
*abbrev_section
;
5455 /* Non-zero if CU currently points to a DWO file and we need to
5456 reread it. When this happens we need to reread the skeleton die
5457 before we can reread the DWO file (this only applies to CUs, not TUs). */
5458 int rereading_dwo_cu
= 0;
5460 if (dwarf_die_debug
)
5461 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5462 this_cu
->is_debug_types
? "type" : "comp",
5463 this_cu
->offset
.sect_off
);
5465 if (use_existing_cu
)
5468 /* If we're reading a TU directly from a DWO file, including a virtual DWO
5469 file (instead of going through the stub), short-circuit all of this. */
5470 if (this_cu
->reading_dwo_directly
)
5472 /* Narrow down the scope of possibilities to have to understand. */
5473 gdb_assert (this_cu
->is_debug_types
);
5474 gdb_assert (abbrev_table
== NULL
);
5475 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
, keep
,
5476 die_reader_func
, data
);
5480 cleanups
= make_cleanup (null_cleanup
, NULL
);
5482 /* This is cheap if the section is already read in. */
5483 dwarf2_read_section (objfile
, section
);
5485 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
5487 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
5489 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5492 /* If this CU is from a DWO file we need to start over, we need to
5493 refetch the attributes from the skeleton CU.
5494 This could be optimized by retrieving those attributes from when we
5495 were here the first time: the previous comp_unit_die was stored in
5496 comp_unit_obstack. But there's no data yet that we need this
5498 if (cu
->dwo_unit
!= NULL
)
5499 rereading_dwo_cu
= 1;
5503 /* If !use_existing_cu, this_cu->cu must be NULL. */
5504 gdb_assert (this_cu
->cu
== NULL
);
5505 cu
= XNEW (struct dwarf2_cu
);
5506 init_one_comp_unit (cu
, this_cu
);
5507 /* If an error occurs while loading, release our storage. */
5508 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5511 /* Get the header. */
5512 if (cu
->header
.first_die_offset
.cu_off
!= 0 && ! rereading_dwo_cu
)
5514 /* We already have the header, there's no need to read it in again. */
5515 info_ptr
+= cu
->header
.first_die_offset
.cu_off
;
5519 if (this_cu
->is_debug_types
)
5522 cu_offset type_offset_in_tu
;
5524 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
5525 abbrev_section
, info_ptr
,
5527 &type_offset_in_tu
);
5529 /* Since per_cu is the first member of struct signatured_type,
5530 we can go from a pointer to one to a pointer to the other. */
5531 sig_type
= (struct signatured_type
*) this_cu
;
5532 gdb_assert (sig_type
->signature
== signature
);
5533 gdb_assert (sig_type
->type_offset_in_tu
.cu_off
5534 == type_offset_in_tu
.cu_off
);
5535 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5537 /* LENGTH has not been set yet for type units if we're
5538 using .gdb_index. */
5539 this_cu
->length
= get_cu_length (&cu
->header
);
5541 /* Establish the type offset that can be used to lookup the type. */
5542 sig_type
->type_offset_in_section
.sect_off
=
5543 this_cu
->offset
.sect_off
+ sig_type
->type_offset_in_tu
.cu_off
;
5547 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5551 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5552 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
5556 /* Skip dummy compilation units. */
5557 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5558 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5560 do_cleanups (cleanups
);
5564 /* If we don't have them yet, read the abbrevs for this compilation unit.
5565 And if we need to read them now, make sure they're freed when we're
5566 done. Note that it's important that if the CU had an abbrev table
5567 on entry we don't free it when we're done: Somewhere up the call stack
5568 it may be in use. */
5569 if (abbrev_table
!= NULL
)
5571 gdb_assert (cu
->abbrev_table
== NULL
);
5572 gdb_assert (cu
->header
.abbrev_offset
.sect_off
5573 == abbrev_table
->offset
.sect_off
);
5574 cu
->abbrev_table
= abbrev_table
;
5576 else if (cu
->abbrev_table
== NULL
)
5578 dwarf2_read_abbrevs (cu
, abbrev_section
);
5579 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5581 else if (rereading_dwo_cu
)
5583 dwarf2_free_abbrev_table (cu
);
5584 dwarf2_read_abbrevs (cu
, abbrev_section
);
5587 /* Read the top level CU/TU die. */
5588 init_cu_die_reader (&reader
, cu
, section
, NULL
);
5589 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5591 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
5593 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
5594 DWO CU, that this test will fail (the attribute will not be present). */
5595 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5598 struct dwo_unit
*dwo_unit
;
5599 struct die_info
*dwo_comp_unit_die
;
5603 complaint (&symfile_complaints
,
5604 _("compilation unit with DW_AT_GNU_dwo_name"
5605 " has children (offset 0x%x) [in module %s]"),
5606 this_cu
->offset
.sect_off
, bfd_get_filename (abfd
));
5608 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
);
5609 if (dwo_unit
!= NULL
)
5611 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
5612 abbrev_table
!= NULL
,
5613 comp_unit_die
, NULL
,
5615 &dwo_comp_unit_die
, &has_children
) == 0)
5618 do_cleanups (cleanups
);
5621 comp_unit_die
= dwo_comp_unit_die
;
5625 /* Yikes, we couldn't find the rest of the DIE, we only have
5626 the stub. A complaint has already been logged. There's
5627 not much more we can do except pass on the stub DIE to
5628 die_reader_func. We don't want to throw an error on bad
5633 /* All of the above is setup for this call. Yikes. */
5634 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5636 /* Done, clean up. */
5637 if (free_cu_cleanup
!= NULL
)
5641 /* We've successfully allocated this compilation unit. Let our
5642 caller clean it up when finished with it. */
5643 discard_cleanups (free_cu_cleanup
);
5645 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5646 So we have to manually free the abbrev table. */
5647 dwarf2_free_abbrev_table (cu
);
5649 /* Link this CU into read_in_chain. */
5650 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5651 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5654 do_cleanups (free_cu_cleanup
);
5657 do_cleanups (cleanups
);
5660 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present.
5661 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed
5662 to have already done the lookup to find the DWO file).
5664 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
5665 THIS_CU->is_debug_types, but nothing else.
5667 We fill in THIS_CU->length.
5669 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5670 linker) then DIE_READER_FUNC will not get called.
5672 THIS_CU->cu is always freed when done.
5673 This is done in order to not leave THIS_CU->cu in a state where we have
5674 to care whether it refers to the "main" CU or the DWO CU. */
5677 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
5678 struct dwo_file
*dwo_file
,
5679 die_reader_func_ftype
*die_reader_func
,
5682 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5683 struct dwarf2_section_info
*section
= this_cu
->section
;
5684 bfd
*abfd
= get_section_bfd_owner (section
);
5685 struct dwarf2_section_info
*abbrev_section
;
5686 struct dwarf2_cu cu
;
5687 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5688 struct die_reader_specs reader
;
5689 struct cleanup
*cleanups
;
5690 struct die_info
*comp_unit_die
;
5693 if (dwarf_die_debug
)
5694 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5695 this_cu
->is_debug_types
? "type" : "comp",
5696 this_cu
->offset
.sect_off
);
5698 gdb_assert (this_cu
->cu
== NULL
);
5700 abbrev_section
= (dwo_file
!= NULL
5701 ? &dwo_file
->sections
.abbrev
5702 : get_abbrev_section_for_cu (this_cu
));
5704 /* This is cheap if the section is already read in. */
5705 dwarf2_read_section (objfile
, section
);
5707 init_one_comp_unit (&cu
, this_cu
);
5709 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
5711 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
5712 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, section
,
5713 abbrev_section
, info_ptr
,
5714 this_cu
->is_debug_types
);
5716 this_cu
->length
= get_cu_length (&cu
.header
);
5718 /* Skip dummy compilation units. */
5719 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5720 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5722 do_cleanups (cleanups
);
5726 dwarf2_read_abbrevs (&cu
, abbrev_section
);
5727 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
5729 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
);
5730 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5732 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5734 do_cleanups (cleanups
);
5737 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
5738 does not lookup the specified DWO file.
5739 This cannot be used to read DWO files.
5741 THIS_CU->cu is always freed when done.
5742 This is done in order to not leave THIS_CU->cu in a state where we have
5743 to care whether it refers to the "main" CU or the DWO CU.
5744 We can revisit this if the data shows there's a performance issue. */
5747 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
5748 die_reader_func_ftype
*die_reader_func
,
5751 init_cutu_and_read_dies_no_follow (this_cu
, NULL
, die_reader_func
, data
);
5754 /* Type Unit Groups.
5756 Type Unit Groups are a way to collapse the set of all TUs (type units) into
5757 a more manageable set. The grouping is done by DW_AT_stmt_list entry
5758 so that all types coming from the same compilation (.o file) are grouped
5759 together. A future step could be to put the types in the same symtab as
5760 the CU the types ultimately came from. */
5763 hash_type_unit_group (const void *item
)
5765 const struct type_unit_group
*tu_group
5766 = (const struct type_unit_group
*) item
;
5768 return hash_stmt_list_entry (&tu_group
->hash
);
5772 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
5774 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
5775 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
5777 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
5780 /* Allocate a hash table for type unit groups. */
5783 allocate_type_unit_groups_table (void)
5785 return htab_create_alloc_ex (3,
5786 hash_type_unit_group
,
5789 &dwarf2_per_objfile
->objfile
->objfile_obstack
,
5790 hashtab_obstack_allocate
,
5791 dummy_obstack_deallocate
);
5794 /* Type units that don't have DW_AT_stmt_list are grouped into their own
5795 partial symtabs. We combine several TUs per psymtab to not let the size
5796 of any one psymtab grow too big. */
5797 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
5798 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
5800 /* Helper routine for get_type_unit_group.
5801 Create the type_unit_group object used to hold one or more TUs. */
5803 static struct type_unit_group
*
5804 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
5806 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5807 struct dwarf2_per_cu_data
*per_cu
;
5808 struct type_unit_group
*tu_group
;
5810 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5811 struct type_unit_group
);
5812 per_cu
= &tu_group
->per_cu
;
5813 per_cu
->objfile
= objfile
;
5815 if (dwarf2_per_objfile
->using_index
)
5817 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5818 struct dwarf2_per_cu_quick_data
);
5822 unsigned int line_offset
= line_offset_struct
.sect_off
;
5823 struct partial_symtab
*pst
;
5826 /* Give the symtab a useful name for debug purposes. */
5827 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
5828 name
= xstrprintf ("<type_units_%d>",
5829 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
5831 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
5833 pst
= create_partial_symtab (per_cu
, name
);
5839 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
5840 tu_group
->hash
.line_offset
= line_offset_struct
;
5845 /* Look up the type_unit_group for type unit CU, and create it if necessary.
5846 STMT_LIST is a DW_AT_stmt_list attribute. */
5848 static struct type_unit_group
*
5849 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
5851 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
5852 struct type_unit_group
*tu_group
;
5854 unsigned int line_offset
;
5855 struct type_unit_group type_unit_group_for_lookup
;
5857 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
5859 dwarf2_per_objfile
->type_unit_groups
=
5860 allocate_type_unit_groups_table ();
5863 /* Do we need to create a new group, or can we use an existing one? */
5867 line_offset
= DW_UNSND (stmt_list
);
5868 ++tu_stats
->nr_symtab_sharers
;
5872 /* Ugh, no stmt_list. Rare, but we have to handle it.
5873 We can do various things here like create one group per TU or
5874 spread them over multiple groups to split up the expansion work.
5875 To avoid worst case scenarios (too many groups or too large groups)
5876 we, umm, group them in bunches. */
5877 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
5878 | (tu_stats
->nr_stmt_less_type_units
5879 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
5880 ++tu_stats
->nr_stmt_less_type_units
;
5883 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
5884 type_unit_group_for_lookup
.hash
.line_offset
.sect_off
= line_offset
;
5885 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
5886 &type_unit_group_for_lookup
, INSERT
);
5889 tu_group
= (struct type_unit_group
*) *slot
;
5890 gdb_assert (tu_group
!= NULL
);
5894 sect_offset line_offset_struct
;
5896 line_offset_struct
.sect_off
= line_offset
;
5897 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
5899 ++tu_stats
->nr_symtabs
;
5905 /* Partial symbol tables. */
5907 /* Create a psymtab named NAME and assign it to PER_CU.
5909 The caller must fill in the following details:
5910 dirname, textlow, texthigh. */
5912 static struct partial_symtab
*
5913 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
5915 struct objfile
*objfile
= per_cu
->objfile
;
5916 struct partial_symtab
*pst
;
5918 pst
= start_psymtab_common (objfile
, name
, 0,
5919 objfile
->global_psymbols
.next
,
5920 objfile
->static_psymbols
.next
);
5922 pst
->psymtabs_addrmap_supported
= 1;
5924 /* This is the glue that links PST into GDB's symbol API. */
5925 pst
->read_symtab_private
= per_cu
;
5926 pst
->read_symtab
= dwarf2_read_symtab
;
5927 per_cu
->v
.psymtab
= pst
;
5932 /* The DATA object passed to process_psymtab_comp_unit_reader has this
5935 struct process_psymtab_comp_unit_data
5937 /* True if we are reading a DW_TAG_partial_unit. */
5939 int want_partial_unit
;
5941 /* The "pretend" language that is used if the CU doesn't declare a
5944 enum language pretend_language
;
5947 /* die_reader_func for process_psymtab_comp_unit. */
5950 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
5951 const gdb_byte
*info_ptr
,
5952 struct die_info
*comp_unit_die
,
5956 struct dwarf2_cu
*cu
= reader
->cu
;
5957 struct objfile
*objfile
= cu
->objfile
;
5958 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
5959 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
5961 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
5962 struct partial_symtab
*pst
;
5963 enum pc_bounds_kind cu_bounds_kind
;
5964 const char *filename
;
5965 struct process_psymtab_comp_unit_data
*info
5966 = (struct process_psymtab_comp_unit_data
*) data
;
5968 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !info
->want_partial_unit
)
5971 gdb_assert (! per_cu
->is_debug_types
);
5973 prepare_one_comp_unit (cu
, comp_unit_die
, info
->pretend_language
);
5975 cu
->list_in_scope
= &file_symbols
;
5977 /* Allocate a new partial symbol table structure. */
5978 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
5979 if (filename
== NULL
)
5982 pst
= create_partial_symtab (per_cu
, filename
);
5984 /* This must be done before calling dwarf2_build_include_psymtabs. */
5985 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
5987 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5989 dwarf2_find_base_address (comp_unit_die
, cu
);
5991 /* Possibly set the default values of LOWPC and HIGHPC from
5993 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
5994 &best_highpc
, cu
, pst
);
5995 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
5996 /* Store the contiguous range if it is not empty; it can be empty for
5997 CUs with no code. */
5998 addrmap_set_empty (objfile
->psymtabs_addrmap
,
5999 gdbarch_adjust_dwarf2_addr (gdbarch
,
6000 best_lowpc
+ baseaddr
),
6001 gdbarch_adjust_dwarf2_addr (gdbarch
,
6002 best_highpc
+ baseaddr
) - 1,
6005 /* Check if comp unit has_children.
6006 If so, read the rest of the partial symbols from this comp unit.
6007 If not, there's no more debug_info for this comp unit. */
6010 struct partial_die_info
*first_die
;
6011 CORE_ADDR lowpc
, highpc
;
6013 lowpc
= ((CORE_ADDR
) -1);
6014 highpc
= ((CORE_ADDR
) 0);
6016 first_die
= load_partial_dies (reader
, info_ptr
, 1);
6018 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
6019 cu_bounds_kind
<= PC_BOUNDS_INVALID
, cu
);
6021 /* If we didn't find a lowpc, set it to highpc to avoid
6022 complaints from `maint check'. */
6023 if (lowpc
== ((CORE_ADDR
) -1))
6026 /* If the compilation unit didn't have an explicit address range,
6027 then use the information extracted from its child dies. */
6028 if (cu_bounds_kind
<= PC_BOUNDS_INVALID
)
6031 best_highpc
= highpc
;
6034 pst
->textlow
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
);
6035 pst
->texthigh
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
);
6037 end_psymtab_common (objfile
, pst
);
6039 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
6042 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
6043 struct dwarf2_per_cu_data
*iter
;
6045 /* Fill in 'dependencies' here; we fill in 'users' in a
6047 pst
->number_of_dependencies
= len
;
6049 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
6051 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
6054 pst
->dependencies
[i
] = iter
->v
.psymtab
;
6056 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
6059 /* Get the list of files included in the current compilation unit,
6060 and build a psymtab for each of them. */
6061 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
6063 if (dwarf_read_debug
)
6065 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6067 fprintf_unfiltered (gdb_stdlog
,
6068 "Psymtab for %s unit @0x%x: %s - %s"
6069 ", %d global, %d static syms\n",
6070 per_cu
->is_debug_types
? "type" : "comp",
6071 per_cu
->offset
.sect_off
,
6072 paddress (gdbarch
, pst
->textlow
),
6073 paddress (gdbarch
, pst
->texthigh
),
6074 pst
->n_global_syms
, pst
->n_static_syms
);
6078 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6079 Process compilation unit THIS_CU for a psymtab. */
6082 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
6083 int want_partial_unit
,
6084 enum language pretend_language
)
6086 struct process_psymtab_comp_unit_data info
;
6088 /* If this compilation unit was already read in, free the
6089 cached copy in order to read it in again. This is
6090 necessary because we skipped some symbols when we first
6091 read in the compilation unit (see load_partial_dies).
6092 This problem could be avoided, but the benefit is unclear. */
6093 if (this_cu
->cu
!= NULL
)
6094 free_one_cached_comp_unit (this_cu
);
6096 gdb_assert (! this_cu
->is_debug_types
);
6097 info
.want_partial_unit
= want_partial_unit
;
6098 info
.pretend_language
= pretend_language
;
6099 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0,
6100 process_psymtab_comp_unit_reader
,
6103 /* Age out any secondary CUs. */
6104 age_cached_comp_units ();
6107 /* Reader function for build_type_psymtabs. */
6110 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
6111 const gdb_byte
*info_ptr
,
6112 struct die_info
*type_unit_die
,
6116 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6117 struct dwarf2_cu
*cu
= reader
->cu
;
6118 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
6119 struct signatured_type
*sig_type
;
6120 struct type_unit_group
*tu_group
;
6121 struct attribute
*attr
;
6122 struct partial_die_info
*first_die
;
6123 CORE_ADDR lowpc
, highpc
;
6124 struct partial_symtab
*pst
;
6126 gdb_assert (data
== NULL
);
6127 gdb_assert (per_cu
->is_debug_types
);
6128 sig_type
= (struct signatured_type
*) per_cu
;
6133 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
6134 tu_group
= get_type_unit_group (cu
, attr
);
6136 VEC_safe_push (sig_type_ptr
, tu_group
->tus
, sig_type
);
6138 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
6139 cu
->list_in_scope
= &file_symbols
;
6140 pst
= create_partial_symtab (per_cu
, "");
6143 first_die
= load_partial_dies (reader
, info_ptr
, 1);
6145 lowpc
= (CORE_ADDR
) -1;
6146 highpc
= (CORE_ADDR
) 0;
6147 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
6149 end_psymtab_common (objfile
, pst
);
6152 /* Struct used to sort TUs by their abbreviation table offset. */
6154 struct tu_abbrev_offset
6156 struct signatured_type
*sig_type
;
6157 sect_offset abbrev_offset
;
6160 /* Helper routine for build_type_psymtabs_1, passed to qsort. */
6163 sort_tu_by_abbrev_offset (const void *ap
, const void *bp
)
6165 const struct tu_abbrev_offset
* const *a
6166 = (const struct tu_abbrev_offset
* const*) ap
;
6167 const struct tu_abbrev_offset
* const *b
6168 = (const struct tu_abbrev_offset
* const*) bp
;
6169 unsigned int aoff
= (*a
)->abbrev_offset
.sect_off
;
6170 unsigned int boff
= (*b
)->abbrev_offset
.sect_off
;
6172 return (aoff
> boff
) - (aoff
< boff
);
6175 /* Efficiently read all the type units.
6176 This does the bulk of the work for build_type_psymtabs.
6178 The efficiency is because we sort TUs by the abbrev table they use and
6179 only read each abbrev table once. In one program there are 200K TUs
6180 sharing 8K abbrev tables.
6182 The main purpose of this function is to support building the
6183 dwarf2_per_objfile->type_unit_groups table.
6184 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
6185 can collapse the search space by grouping them by stmt_list.
6186 The savings can be significant, in the same program from above the 200K TUs
6187 share 8K stmt_list tables.
6189 FUNC is expected to call get_type_unit_group, which will create the
6190 struct type_unit_group if necessary and add it to
6191 dwarf2_per_objfile->type_unit_groups. */
6194 build_type_psymtabs_1 (void)
6196 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6197 struct cleanup
*cleanups
;
6198 struct abbrev_table
*abbrev_table
;
6199 sect_offset abbrev_offset
;
6200 struct tu_abbrev_offset
*sorted_by_abbrev
;
6203 /* It's up to the caller to not call us multiple times. */
6204 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
6206 if (dwarf2_per_objfile
->n_type_units
== 0)
6209 /* TUs typically share abbrev tables, and there can be way more TUs than
6210 abbrev tables. Sort by abbrev table to reduce the number of times we
6211 read each abbrev table in.
6212 Alternatives are to punt or to maintain a cache of abbrev tables.
6213 This is simpler and efficient enough for now.
6215 Later we group TUs by their DW_AT_stmt_list value (as this defines the
6216 symtab to use). Typically TUs with the same abbrev offset have the same
6217 stmt_list value too so in practice this should work well.
6219 The basic algorithm here is:
6221 sort TUs by abbrev table
6222 for each TU with same abbrev table:
6223 read abbrev table if first user
6224 read TU top level DIE
6225 [IWBN if DWO skeletons had DW_AT_stmt_list]
6228 if (dwarf_read_debug
)
6229 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
6231 /* Sort in a separate table to maintain the order of all_type_units
6232 for .gdb_index: TU indices directly index all_type_units. */
6233 sorted_by_abbrev
= XNEWVEC (struct tu_abbrev_offset
,
6234 dwarf2_per_objfile
->n_type_units
);
6235 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6237 struct signatured_type
*sig_type
= dwarf2_per_objfile
->all_type_units
[i
];
6239 sorted_by_abbrev
[i
].sig_type
= sig_type
;
6240 sorted_by_abbrev
[i
].abbrev_offset
=
6241 read_abbrev_offset (sig_type
->per_cu
.section
,
6242 sig_type
->per_cu
.offset
);
6244 cleanups
= make_cleanup (xfree
, sorted_by_abbrev
);
6245 qsort (sorted_by_abbrev
, dwarf2_per_objfile
->n_type_units
,
6246 sizeof (struct tu_abbrev_offset
), sort_tu_by_abbrev_offset
);
6248 abbrev_offset
.sect_off
= ~(unsigned) 0;
6249 abbrev_table
= NULL
;
6250 make_cleanup (abbrev_table_free_cleanup
, &abbrev_table
);
6252 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6254 const struct tu_abbrev_offset
*tu
= &sorted_by_abbrev
[i
];
6256 /* Switch to the next abbrev table if necessary. */
6257 if (abbrev_table
== NULL
6258 || tu
->abbrev_offset
.sect_off
!= abbrev_offset
.sect_off
)
6260 if (abbrev_table
!= NULL
)
6262 abbrev_table_free (abbrev_table
);
6263 /* Reset to NULL in case abbrev_table_read_table throws
6264 an error: abbrev_table_free_cleanup will get called. */
6265 abbrev_table
= NULL
;
6267 abbrev_offset
= tu
->abbrev_offset
;
6269 abbrev_table_read_table (&dwarf2_per_objfile
->abbrev
,
6271 ++tu_stats
->nr_uniq_abbrev_tables
;
6274 init_cutu_and_read_dies (&tu
->sig_type
->per_cu
, abbrev_table
, 0, 0,
6275 build_type_psymtabs_reader
, NULL
);
6278 do_cleanups (cleanups
);
6281 /* Print collected type unit statistics. */
6284 print_tu_stats (void)
6286 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6288 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
6289 fprintf_unfiltered (gdb_stdlog
, " %d TUs\n",
6290 dwarf2_per_objfile
->n_type_units
);
6291 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
6292 tu_stats
->nr_uniq_abbrev_tables
);
6293 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
6294 tu_stats
->nr_symtabs
);
6295 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
6296 tu_stats
->nr_symtab_sharers
);
6297 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
6298 tu_stats
->nr_stmt_less_type_units
);
6299 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
6300 tu_stats
->nr_all_type_units_reallocs
);
6303 /* Traversal function for build_type_psymtabs. */
6306 build_type_psymtab_dependencies (void **slot
, void *info
)
6308 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6309 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
6310 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
6311 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6312 int len
= VEC_length (sig_type_ptr
, tu_group
->tus
);
6313 struct signatured_type
*iter
;
6316 gdb_assert (len
> 0);
6317 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
6319 pst
->number_of_dependencies
= len
;
6321 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
6323 VEC_iterate (sig_type_ptr
, tu_group
->tus
, i
, iter
);
6326 gdb_assert (iter
->per_cu
.is_debug_types
);
6327 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
6328 iter
->type_unit_group
= tu_group
;
6331 VEC_free (sig_type_ptr
, tu_group
->tus
);
6336 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6337 Build partial symbol tables for the .debug_types comp-units. */
6340 build_type_psymtabs (struct objfile
*objfile
)
6342 if (! create_all_type_units (objfile
))
6345 build_type_psymtabs_1 ();
6348 /* Traversal function for process_skeletonless_type_unit.
6349 Read a TU in a DWO file and build partial symbols for it. */
6352 process_skeletonless_type_unit (void **slot
, void *info
)
6354 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
6355 struct objfile
*objfile
= (struct objfile
*) info
;
6356 struct signatured_type find_entry
, *entry
;
6358 /* If this TU doesn't exist in the global table, add it and read it in. */
6360 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6362 dwarf2_per_objfile
->signatured_types
6363 = allocate_signatured_type_table (objfile
);
6366 find_entry
.signature
= dwo_unit
->signature
;
6367 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
, &find_entry
,
6369 /* If we've already seen this type there's nothing to do. What's happening
6370 is we're doing our own version of comdat-folding here. */
6374 /* This does the job that create_all_type_units would have done for
6376 entry
= add_type_unit (dwo_unit
->signature
, slot
);
6377 fill_in_sig_entry_from_dwo_entry (objfile
, entry
, dwo_unit
);
6380 /* This does the job that build_type_psymtabs_1 would have done. */
6381 init_cutu_and_read_dies (&entry
->per_cu
, NULL
, 0, 0,
6382 build_type_psymtabs_reader
, NULL
);
6387 /* Traversal function for process_skeletonless_type_units. */
6390 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
6392 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
6394 if (dwo_file
->tus
!= NULL
)
6396 htab_traverse_noresize (dwo_file
->tus
,
6397 process_skeletonless_type_unit
, info
);
6403 /* Scan all TUs of DWO files, verifying we've processed them.
6404 This is needed in case a TU was emitted without its skeleton.
6405 Note: This can't be done until we know what all the DWO files are. */
6408 process_skeletonless_type_units (struct objfile
*objfile
)
6410 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
6411 if (get_dwp_file () == NULL
6412 && dwarf2_per_objfile
->dwo_files
!= NULL
)
6414 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
,
6415 process_dwo_file_for_skeletonless_type_units
,
6420 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
6423 psymtabs_addrmap_cleanup (void *o
)
6425 struct objfile
*objfile
= (struct objfile
*) o
;
6427 objfile
->psymtabs_addrmap
= NULL
;
6430 /* Compute the 'user' field for each psymtab in OBJFILE. */
6433 set_partial_user (struct objfile
*objfile
)
6437 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6439 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6440 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6446 for (j
= 0; j
< pst
->number_of_dependencies
; ++j
)
6448 /* Set the 'user' field only if it is not already set. */
6449 if (pst
->dependencies
[j
]->user
== NULL
)
6450 pst
->dependencies
[j
]->user
= pst
;
6455 /* Build the partial symbol table by doing a quick pass through the
6456 .debug_info and .debug_abbrev sections. */
6459 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
6461 struct cleanup
*back_to
, *addrmap_cleanup
;
6462 struct obstack temp_obstack
;
6465 if (dwarf_read_debug
)
6467 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
6468 objfile_name (objfile
));
6471 dwarf2_per_objfile
->reading_partial_symbols
= 1;
6473 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
6475 /* Any cached compilation units will be linked by the per-objfile
6476 read_in_chain. Make sure to free them when we're done. */
6477 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
6479 build_type_psymtabs (objfile
);
6481 create_all_comp_units (objfile
);
6483 /* Create a temporary address map on a temporary obstack. We later
6484 copy this to the final obstack. */
6485 obstack_init (&temp_obstack
);
6486 make_cleanup_obstack_free (&temp_obstack
);
6487 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
6488 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
6490 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6492 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6494 process_psymtab_comp_unit (per_cu
, 0, language_minimal
);
6497 /* This has to wait until we read the CUs, we need the list of DWOs. */
6498 process_skeletonless_type_units (objfile
);
6500 /* Now that all TUs have been processed we can fill in the dependencies. */
6501 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
6503 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
6504 build_type_psymtab_dependencies
, NULL
);
6507 if (dwarf_read_debug
)
6510 set_partial_user (objfile
);
6512 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
6513 &objfile
->objfile_obstack
);
6514 discard_cleanups (addrmap_cleanup
);
6516 do_cleanups (back_to
);
6518 if (dwarf_read_debug
)
6519 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
6520 objfile_name (objfile
));
6523 /* die_reader_func for load_partial_comp_unit. */
6526 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
6527 const gdb_byte
*info_ptr
,
6528 struct die_info
*comp_unit_die
,
6532 struct dwarf2_cu
*cu
= reader
->cu
;
6534 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
6536 /* Check if comp unit has_children.
6537 If so, read the rest of the partial symbols from this comp unit.
6538 If not, there's no more debug_info for this comp unit. */
6540 load_partial_dies (reader
, info_ptr
, 0);
6543 /* Load the partial DIEs for a secondary CU into memory.
6544 This is also used when rereading a primary CU with load_all_dies. */
6547 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
6549 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
6550 load_partial_comp_unit_reader
, NULL
);
6554 read_comp_units_from_section (struct objfile
*objfile
,
6555 struct dwarf2_section_info
*section
,
6556 unsigned int is_dwz
,
6559 struct dwarf2_per_cu_data
***all_comp_units
)
6561 const gdb_byte
*info_ptr
;
6562 bfd
*abfd
= get_section_bfd_owner (section
);
6564 if (dwarf_read_debug
)
6565 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
6566 get_section_name (section
),
6567 get_section_file_name (section
));
6569 dwarf2_read_section (objfile
, section
);
6571 info_ptr
= section
->buffer
;
6573 while (info_ptr
< section
->buffer
+ section
->size
)
6575 unsigned int length
, initial_length_size
;
6576 struct dwarf2_per_cu_data
*this_cu
;
6579 offset
.sect_off
= info_ptr
- section
->buffer
;
6581 /* Read just enough information to find out where the next
6582 compilation unit is. */
6583 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6585 /* Save the compilation unit for later lookup. */
6586 this_cu
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_per_cu_data
);
6587 memset (this_cu
, 0, sizeof (*this_cu
));
6588 this_cu
->offset
= offset
;
6589 this_cu
->length
= length
+ initial_length_size
;
6590 this_cu
->is_dwz
= is_dwz
;
6591 this_cu
->objfile
= objfile
;
6592 this_cu
->section
= section
;
6594 if (*n_comp_units
== *n_allocated
)
6597 *all_comp_units
= XRESIZEVEC (struct dwarf2_per_cu_data
*,
6598 *all_comp_units
, *n_allocated
);
6600 (*all_comp_units
)[*n_comp_units
] = this_cu
;
6603 info_ptr
= info_ptr
+ this_cu
->length
;
6607 /* Create a list of all compilation units in OBJFILE.
6608 This is only done for -readnow and building partial symtabs. */
6611 create_all_comp_units (struct objfile
*objfile
)
6615 struct dwarf2_per_cu_data
**all_comp_units
;
6616 struct dwz_file
*dwz
;
6620 all_comp_units
= XNEWVEC (struct dwarf2_per_cu_data
*, n_allocated
);
6622 read_comp_units_from_section (objfile
, &dwarf2_per_objfile
->info
, 0,
6623 &n_allocated
, &n_comp_units
, &all_comp_units
);
6625 dwz
= dwarf2_get_dwz_file ();
6627 read_comp_units_from_section (objfile
, &dwz
->info
, 1,
6628 &n_allocated
, &n_comp_units
,
6631 dwarf2_per_objfile
->all_comp_units
= XOBNEWVEC (&objfile
->objfile_obstack
,
6632 struct dwarf2_per_cu_data
*,
6634 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
6635 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
6636 xfree (all_comp_units
);
6637 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
6640 /* Process all loaded DIEs for compilation unit CU, starting at
6641 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
6642 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
6643 DW_AT_ranges). See the comments of add_partial_subprogram on how
6644 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
6647 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
6648 CORE_ADDR
*highpc
, int set_addrmap
,
6649 struct dwarf2_cu
*cu
)
6651 struct partial_die_info
*pdi
;
6653 /* Now, march along the PDI's, descending into ones which have
6654 interesting children but skipping the children of the other ones,
6655 until we reach the end of the compilation unit. */
6661 fixup_partial_die (pdi
, cu
);
6663 /* Anonymous namespaces or modules have no name but have interesting
6664 children, so we need to look at them. Ditto for anonymous
6667 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
6668 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
6669 || pdi
->tag
== DW_TAG_imported_unit
)
6673 case DW_TAG_subprogram
:
6674 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6676 case DW_TAG_constant
:
6677 case DW_TAG_variable
:
6678 case DW_TAG_typedef
:
6679 case DW_TAG_union_type
:
6680 if (!pdi
->is_declaration
)
6682 add_partial_symbol (pdi
, cu
);
6685 case DW_TAG_class_type
:
6686 case DW_TAG_interface_type
:
6687 case DW_TAG_structure_type
:
6688 if (!pdi
->is_declaration
)
6690 add_partial_symbol (pdi
, cu
);
6692 if (cu
->language
== language_rust
&& pdi
->has_children
)
6693 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
6696 case DW_TAG_enumeration_type
:
6697 if (!pdi
->is_declaration
)
6698 add_partial_enumeration (pdi
, cu
);
6700 case DW_TAG_base_type
:
6701 case DW_TAG_subrange_type
:
6702 /* File scope base type definitions are added to the partial
6704 add_partial_symbol (pdi
, cu
);
6706 case DW_TAG_namespace
:
6707 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6710 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6712 case DW_TAG_imported_unit
:
6714 struct dwarf2_per_cu_data
*per_cu
;
6716 /* For now we don't handle imported units in type units. */
6717 if (cu
->per_cu
->is_debug_types
)
6719 error (_("Dwarf Error: DW_TAG_imported_unit is not"
6720 " supported in type units [in module %s]"),
6721 objfile_name (cu
->objfile
));
6724 per_cu
= dwarf2_find_containing_comp_unit (pdi
->d
.offset
,
6728 /* Go read the partial unit, if needed. */
6729 if (per_cu
->v
.psymtab
== NULL
)
6730 process_psymtab_comp_unit (per_cu
, 1, cu
->language
);
6732 VEC_safe_push (dwarf2_per_cu_ptr
,
6733 cu
->per_cu
->imported_symtabs
, per_cu
);
6736 case DW_TAG_imported_declaration
:
6737 add_partial_symbol (pdi
, cu
);
6744 /* If the die has a sibling, skip to the sibling. */
6746 pdi
= pdi
->die_sibling
;
6750 /* Functions used to compute the fully scoped name of a partial DIE.
6752 Normally, this is simple. For C++, the parent DIE's fully scoped
6753 name is concatenated with "::" and the partial DIE's name.
6754 Enumerators are an exception; they use the scope of their parent
6755 enumeration type, i.e. the name of the enumeration type is not
6756 prepended to the enumerator.
6758 There are two complexities. One is DW_AT_specification; in this
6759 case "parent" means the parent of the target of the specification,
6760 instead of the direct parent of the DIE. The other is compilers
6761 which do not emit DW_TAG_namespace; in this case we try to guess
6762 the fully qualified name of structure types from their members'
6763 linkage names. This must be done using the DIE's children rather
6764 than the children of any DW_AT_specification target. We only need
6765 to do this for structures at the top level, i.e. if the target of
6766 any DW_AT_specification (if any; otherwise the DIE itself) does not
6769 /* Compute the scope prefix associated with PDI's parent, in
6770 compilation unit CU. The result will be allocated on CU's
6771 comp_unit_obstack, or a copy of the already allocated PDI->NAME
6772 field. NULL is returned if no prefix is necessary. */
6774 partial_die_parent_scope (struct partial_die_info
*pdi
,
6775 struct dwarf2_cu
*cu
)
6777 const char *grandparent_scope
;
6778 struct partial_die_info
*parent
, *real_pdi
;
6780 /* We need to look at our parent DIE; if we have a DW_AT_specification,
6781 then this means the parent of the specification DIE. */
6784 while (real_pdi
->has_specification
)
6785 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
6786 real_pdi
->spec_is_dwz
, cu
);
6788 parent
= real_pdi
->die_parent
;
6792 if (parent
->scope_set
)
6793 return parent
->scope
;
6795 fixup_partial_die (parent
, cu
);
6797 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
6799 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
6800 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
6801 Work around this problem here. */
6802 if (cu
->language
== language_cplus
6803 && parent
->tag
== DW_TAG_namespace
6804 && strcmp (parent
->name
, "::") == 0
6805 && grandparent_scope
== NULL
)
6807 parent
->scope
= NULL
;
6808 parent
->scope_set
= 1;
6812 if (pdi
->tag
== DW_TAG_enumerator
)
6813 /* Enumerators should not get the name of the enumeration as a prefix. */
6814 parent
->scope
= grandparent_scope
;
6815 else if (parent
->tag
== DW_TAG_namespace
6816 || parent
->tag
== DW_TAG_module
6817 || parent
->tag
== DW_TAG_structure_type
6818 || parent
->tag
== DW_TAG_class_type
6819 || parent
->tag
== DW_TAG_interface_type
6820 || parent
->tag
== DW_TAG_union_type
6821 || parent
->tag
== DW_TAG_enumeration_type
)
6823 if (grandparent_scope
== NULL
)
6824 parent
->scope
= parent
->name
;
6826 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
6828 parent
->name
, 0, cu
);
6832 /* FIXME drow/2004-04-01: What should we be doing with
6833 function-local names? For partial symbols, we should probably be
6835 complaint (&symfile_complaints
,
6836 _("unhandled containing DIE tag %d for DIE at %d"),
6837 parent
->tag
, pdi
->offset
.sect_off
);
6838 parent
->scope
= grandparent_scope
;
6841 parent
->scope_set
= 1;
6842 return parent
->scope
;
6845 /* Return the fully scoped name associated with PDI, from compilation unit
6846 CU. The result will be allocated with malloc. */
6849 partial_die_full_name (struct partial_die_info
*pdi
,
6850 struct dwarf2_cu
*cu
)
6852 const char *parent_scope
;
6854 /* If this is a template instantiation, we can not work out the
6855 template arguments from partial DIEs. So, unfortunately, we have
6856 to go through the full DIEs. At least any work we do building
6857 types here will be reused if full symbols are loaded later. */
6858 if (pdi
->has_template_arguments
)
6860 fixup_partial_die (pdi
, cu
);
6862 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
6864 struct die_info
*die
;
6865 struct attribute attr
;
6866 struct dwarf2_cu
*ref_cu
= cu
;
6868 /* DW_FORM_ref_addr is using section offset. */
6869 attr
.name
= (enum dwarf_attribute
) 0;
6870 attr
.form
= DW_FORM_ref_addr
;
6871 attr
.u
.unsnd
= pdi
->offset
.sect_off
;
6872 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
6874 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
6878 parent_scope
= partial_die_parent_scope (pdi
, cu
);
6879 if (parent_scope
== NULL
)
6882 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
6886 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
6888 struct objfile
*objfile
= cu
->objfile
;
6889 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6891 const char *actual_name
= NULL
;
6893 char *built_actual_name
;
6895 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6897 built_actual_name
= partial_die_full_name (pdi
, cu
);
6898 if (built_actual_name
!= NULL
)
6899 actual_name
= built_actual_name
;
6901 if (actual_name
== NULL
)
6902 actual_name
= pdi
->name
;
6906 case DW_TAG_subprogram
:
6907 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
);
6908 if (pdi
->is_external
|| cu
->language
== language_ada
)
6910 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
6911 of the global scope. But in Ada, we want to be able to access
6912 nested procedures globally. So all Ada subprograms are stored
6913 in the global scope. */
6914 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6915 built_actual_name
!= NULL
,
6916 VAR_DOMAIN
, LOC_BLOCK
,
6917 &objfile
->global_psymbols
,
6918 addr
, cu
->language
, objfile
);
6922 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6923 built_actual_name
!= NULL
,
6924 VAR_DOMAIN
, LOC_BLOCK
,
6925 &objfile
->static_psymbols
,
6926 addr
, cu
->language
, objfile
);
6929 if (pdi
->main_subprogram
&& actual_name
!= NULL
)
6930 set_objfile_main_name (objfile
, actual_name
, cu
->language
);
6932 case DW_TAG_constant
:
6934 struct psymbol_allocation_list
*list
;
6936 if (pdi
->is_external
)
6937 list
= &objfile
->global_psymbols
;
6939 list
= &objfile
->static_psymbols
;
6940 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6941 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
6942 list
, 0, cu
->language
, objfile
);
6945 case DW_TAG_variable
:
6947 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
6951 && !dwarf2_per_objfile
->has_section_at_zero
)
6953 /* A global or static variable may also have been stripped
6954 out by the linker if unused, in which case its address
6955 will be nullified; do not add such variables into partial
6956 symbol table then. */
6958 else if (pdi
->is_external
)
6961 Don't enter into the minimal symbol tables as there is
6962 a minimal symbol table entry from the ELF symbols already.
6963 Enter into partial symbol table if it has a location
6964 descriptor or a type.
6965 If the location descriptor is missing, new_symbol will create
6966 a LOC_UNRESOLVED symbol, the address of the variable will then
6967 be determined from the minimal symbol table whenever the variable
6969 The address for the partial symbol table entry is not
6970 used by GDB, but it comes in handy for debugging partial symbol
6973 if (pdi
->d
.locdesc
|| pdi
->has_type
)
6974 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6975 built_actual_name
!= NULL
,
6976 VAR_DOMAIN
, LOC_STATIC
,
6977 &objfile
->global_psymbols
,
6979 cu
->language
, objfile
);
6983 int has_loc
= pdi
->d
.locdesc
!= NULL
;
6985 /* Static Variable. Skip symbols whose value we cannot know (those
6986 without location descriptors or constant values). */
6987 if (!has_loc
&& !pdi
->has_const_value
)
6989 xfree (built_actual_name
);
6993 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6994 built_actual_name
!= NULL
,
6995 VAR_DOMAIN
, LOC_STATIC
,
6996 &objfile
->static_psymbols
,
6997 has_loc
? addr
+ baseaddr
: (CORE_ADDR
) 0,
6998 cu
->language
, objfile
);
7001 case DW_TAG_typedef
:
7002 case DW_TAG_base_type
:
7003 case DW_TAG_subrange_type
:
7004 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7005 built_actual_name
!= NULL
,
7006 VAR_DOMAIN
, LOC_TYPEDEF
,
7007 &objfile
->static_psymbols
,
7008 0, cu
->language
, objfile
);
7010 case DW_TAG_imported_declaration
:
7011 case DW_TAG_namespace
:
7012 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7013 built_actual_name
!= NULL
,
7014 VAR_DOMAIN
, LOC_TYPEDEF
,
7015 &objfile
->global_psymbols
,
7016 0, cu
->language
, objfile
);
7019 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7020 built_actual_name
!= NULL
,
7021 MODULE_DOMAIN
, LOC_TYPEDEF
,
7022 &objfile
->global_psymbols
,
7023 0, cu
->language
, objfile
);
7025 case DW_TAG_class_type
:
7026 case DW_TAG_interface_type
:
7027 case DW_TAG_structure_type
:
7028 case DW_TAG_union_type
:
7029 case DW_TAG_enumeration_type
:
7030 /* Skip external references. The DWARF standard says in the section
7031 about "Structure, Union, and Class Type Entries": "An incomplete
7032 structure, union or class type is represented by a structure,
7033 union or class entry that does not have a byte size attribute
7034 and that has a DW_AT_declaration attribute." */
7035 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
7037 xfree (built_actual_name
);
7041 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
7042 static vs. global. */
7043 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7044 built_actual_name
!= NULL
,
7045 STRUCT_DOMAIN
, LOC_TYPEDEF
,
7046 cu
->language
== language_cplus
7047 ? &objfile
->global_psymbols
7048 : &objfile
->static_psymbols
,
7049 0, cu
->language
, objfile
);
7052 case DW_TAG_enumerator
:
7053 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7054 built_actual_name
!= NULL
,
7055 VAR_DOMAIN
, LOC_CONST
,
7056 cu
->language
== language_cplus
7057 ? &objfile
->global_psymbols
7058 : &objfile
->static_psymbols
,
7059 0, cu
->language
, objfile
);
7065 xfree (built_actual_name
);
7068 /* Read a partial die corresponding to a namespace; also, add a symbol
7069 corresponding to that namespace to the symbol table. NAMESPACE is
7070 the name of the enclosing namespace. */
7073 add_partial_namespace (struct partial_die_info
*pdi
,
7074 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7075 int set_addrmap
, struct dwarf2_cu
*cu
)
7077 /* Add a symbol for the namespace. */
7079 add_partial_symbol (pdi
, cu
);
7081 /* Now scan partial symbols in that namespace. */
7083 if (pdi
->has_children
)
7084 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7087 /* Read a partial die corresponding to a Fortran module. */
7090 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
7091 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
7093 /* Add a symbol for the namespace. */
7095 add_partial_symbol (pdi
, cu
);
7097 /* Now scan partial symbols in that module. */
7099 if (pdi
->has_children
)
7100 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7103 /* Read a partial die corresponding to a subprogram and create a partial
7104 symbol for that subprogram. When the CU language allows it, this
7105 routine also defines a partial symbol for each nested subprogram
7106 that this subprogram contains. If SET_ADDRMAP is true, record the
7107 covered ranges in the addrmap. Set *LOWPC and *HIGHPC to the lowest
7108 and highest PC values found in PDI.
7110 PDI may also be a lexical block, in which case we simply search
7111 recursively for subprograms defined inside that lexical block.
7112 Again, this is only performed when the CU language allows this
7113 type of definitions. */
7116 add_partial_subprogram (struct partial_die_info
*pdi
,
7117 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7118 int set_addrmap
, struct dwarf2_cu
*cu
)
7120 if (pdi
->tag
== DW_TAG_subprogram
)
7122 if (pdi
->has_pc_info
)
7124 if (pdi
->lowpc
< *lowpc
)
7125 *lowpc
= pdi
->lowpc
;
7126 if (pdi
->highpc
> *highpc
)
7127 *highpc
= pdi
->highpc
;
7130 struct objfile
*objfile
= cu
->objfile
;
7131 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7136 baseaddr
= ANOFFSET (objfile
->section_offsets
,
7137 SECT_OFF_TEXT (objfile
));
7138 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7139 pdi
->lowpc
+ baseaddr
);
7140 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7141 pdi
->highpc
+ baseaddr
);
7142 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
7143 cu
->per_cu
->v
.psymtab
);
7147 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
7149 if (!pdi
->is_declaration
)
7150 /* Ignore subprogram DIEs that do not have a name, they are
7151 illegal. Do not emit a complaint at this point, we will
7152 do so when we convert this psymtab into a symtab. */
7154 add_partial_symbol (pdi
, cu
);
7158 if (! pdi
->has_children
)
7161 if (cu
->language
== language_ada
)
7163 pdi
= pdi
->die_child
;
7166 fixup_partial_die (pdi
, cu
);
7167 if (pdi
->tag
== DW_TAG_subprogram
7168 || pdi
->tag
== DW_TAG_lexical_block
)
7169 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
7170 pdi
= pdi
->die_sibling
;
7175 /* Read a partial die corresponding to an enumeration type. */
7178 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
7179 struct dwarf2_cu
*cu
)
7181 struct partial_die_info
*pdi
;
7183 if (enum_pdi
->name
!= NULL
)
7184 add_partial_symbol (enum_pdi
, cu
);
7186 pdi
= enum_pdi
->die_child
;
7189 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
7190 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
7192 add_partial_symbol (pdi
, cu
);
7193 pdi
= pdi
->die_sibling
;
7197 /* Return the initial uleb128 in the die at INFO_PTR. */
7200 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
7202 unsigned int bytes_read
;
7204 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7207 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
7208 Return the corresponding abbrev, or NULL if the number is zero (indicating
7209 an empty DIE). In either case *BYTES_READ will be set to the length of
7210 the initial number. */
7212 static struct abbrev_info
*
7213 peek_die_abbrev (const gdb_byte
*info_ptr
, unsigned int *bytes_read
,
7214 struct dwarf2_cu
*cu
)
7216 bfd
*abfd
= cu
->objfile
->obfd
;
7217 unsigned int abbrev_number
;
7218 struct abbrev_info
*abbrev
;
7220 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
7222 if (abbrev_number
== 0)
7225 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
7228 error (_("Dwarf Error: Could not find abbrev number %d in %s"
7229 " at offset 0x%x [in module %s]"),
7230 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
7231 cu
->header
.offset
.sect_off
, bfd_get_filename (abfd
));
7237 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7238 Returns a pointer to the end of a series of DIEs, terminated by an empty
7239 DIE. Any children of the skipped DIEs will also be skipped. */
7241 static const gdb_byte
*
7242 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
7244 struct dwarf2_cu
*cu
= reader
->cu
;
7245 struct abbrev_info
*abbrev
;
7246 unsigned int bytes_read
;
7250 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
7252 return info_ptr
+ bytes_read
;
7254 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
7258 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7259 INFO_PTR should point just after the initial uleb128 of a DIE, and the
7260 abbrev corresponding to that skipped uleb128 should be passed in
7261 ABBREV. Returns a pointer to this DIE's sibling, skipping any
7264 static const gdb_byte
*
7265 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
7266 struct abbrev_info
*abbrev
)
7268 unsigned int bytes_read
;
7269 struct attribute attr
;
7270 bfd
*abfd
= reader
->abfd
;
7271 struct dwarf2_cu
*cu
= reader
->cu
;
7272 const gdb_byte
*buffer
= reader
->buffer
;
7273 const gdb_byte
*buffer_end
= reader
->buffer_end
;
7274 unsigned int form
, i
;
7276 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
7278 /* The only abbrev we care about is DW_AT_sibling. */
7279 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
7281 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
7282 if (attr
.form
== DW_FORM_ref_addr
)
7283 complaint (&symfile_complaints
,
7284 _("ignoring absolute DW_AT_sibling"));
7287 unsigned int off
= dwarf2_get_ref_die_offset (&attr
).sect_off
;
7288 const gdb_byte
*sibling_ptr
= buffer
+ off
;
7290 if (sibling_ptr
< info_ptr
)
7291 complaint (&symfile_complaints
,
7292 _("DW_AT_sibling points backwards"));
7293 else if (sibling_ptr
> reader
->buffer_end
)
7294 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
7300 /* If it isn't DW_AT_sibling, skip this attribute. */
7301 form
= abbrev
->attrs
[i
].form
;
7305 case DW_FORM_ref_addr
:
7306 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
7307 and later it is offset sized. */
7308 if (cu
->header
.version
== 2)
7309 info_ptr
+= cu
->header
.addr_size
;
7311 info_ptr
+= cu
->header
.offset_size
;
7313 case DW_FORM_GNU_ref_alt
:
7314 info_ptr
+= cu
->header
.offset_size
;
7317 info_ptr
+= cu
->header
.addr_size
;
7324 case DW_FORM_flag_present
:
7336 case DW_FORM_ref_sig8
:
7339 case DW_FORM_string
:
7340 read_direct_string (abfd
, info_ptr
, &bytes_read
);
7341 info_ptr
+= bytes_read
;
7343 case DW_FORM_sec_offset
:
7345 case DW_FORM_GNU_strp_alt
:
7346 info_ptr
+= cu
->header
.offset_size
;
7348 case DW_FORM_exprloc
:
7350 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7351 info_ptr
+= bytes_read
;
7353 case DW_FORM_block1
:
7354 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
7356 case DW_FORM_block2
:
7357 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
7359 case DW_FORM_block4
:
7360 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
7364 case DW_FORM_ref_udata
:
7365 case DW_FORM_GNU_addr_index
:
7366 case DW_FORM_GNU_str_index
:
7367 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
7369 case DW_FORM_indirect
:
7370 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7371 info_ptr
+= bytes_read
;
7372 /* We need to continue parsing from here, so just go back to
7374 goto skip_attribute
;
7377 error (_("Dwarf Error: Cannot handle %s "
7378 "in DWARF reader [in module %s]"),
7379 dwarf_form_name (form
),
7380 bfd_get_filename (abfd
));
7384 if (abbrev
->has_children
)
7385 return skip_children (reader
, info_ptr
);
7390 /* Locate ORIG_PDI's sibling.
7391 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
7393 static const gdb_byte
*
7394 locate_pdi_sibling (const struct die_reader_specs
*reader
,
7395 struct partial_die_info
*orig_pdi
,
7396 const gdb_byte
*info_ptr
)
7398 /* Do we know the sibling already? */
7400 if (orig_pdi
->sibling
)
7401 return orig_pdi
->sibling
;
7403 /* Are there any children to deal with? */
7405 if (!orig_pdi
->has_children
)
7408 /* Skip the children the long way. */
7410 return skip_children (reader
, info_ptr
);
7413 /* Expand this partial symbol table into a full symbol table. SELF is
7417 dwarf2_read_symtab (struct partial_symtab
*self
,
7418 struct objfile
*objfile
)
7422 warning (_("bug: psymtab for %s is already read in."),
7429 printf_filtered (_("Reading in symbols for %s..."),
7431 gdb_flush (gdb_stdout
);
7434 /* Restore our global data. */
7436 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
7437 dwarf2_objfile_data_key
);
7439 /* If this psymtab is constructed from a debug-only objfile, the
7440 has_section_at_zero flag will not necessarily be correct. We
7441 can get the correct value for this flag by looking at the data
7442 associated with the (presumably stripped) associated objfile. */
7443 if (objfile
->separate_debug_objfile_backlink
)
7445 struct dwarf2_per_objfile
*dpo_backlink
7446 = ((struct dwarf2_per_objfile
*)
7447 objfile_data (objfile
->separate_debug_objfile_backlink
,
7448 dwarf2_objfile_data_key
));
7450 dwarf2_per_objfile
->has_section_at_zero
7451 = dpo_backlink
->has_section_at_zero
;
7454 dwarf2_per_objfile
->reading_partial_symbols
= 0;
7456 psymtab_to_symtab_1 (self
);
7458 /* Finish up the debug error message. */
7460 printf_filtered (_("done.\n"));
7463 process_cu_includes ();
7466 /* Reading in full CUs. */
7468 /* Add PER_CU to the queue. */
7471 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
7472 enum language pretend_language
)
7474 struct dwarf2_queue_item
*item
;
7477 item
= XNEW (struct dwarf2_queue_item
);
7478 item
->per_cu
= per_cu
;
7479 item
->pretend_language
= pretend_language
;
7482 if (dwarf2_queue
== NULL
)
7483 dwarf2_queue
= item
;
7485 dwarf2_queue_tail
->next
= item
;
7487 dwarf2_queue_tail
= item
;
7490 /* If PER_CU is not yet queued, add it to the queue.
7491 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
7493 The result is non-zero if PER_CU was queued, otherwise the result is zero
7494 meaning either PER_CU is already queued or it is already loaded.
7496 N.B. There is an invariant here that if a CU is queued then it is loaded.
7497 The caller is required to load PER_CU if we return non-zero. */
7500 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
7501 struct dwarf2_per_cu_data
*per_cu
,
7502 enum language pretend_language
)
7504 /* We may arrive here during partial symbol reading, if we need full
7505 DIEs to process an unusual case (e.g. template arguments). Do
7506 not queue PER_CU, just tell our caller to load its DIEs. */
7507 if (dwarf2_per_objfile
->reading_partial_symbols
)
7509 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
7514 /* Mark the dependence relation so that we don't flush PER_CU
7516 if (dependent_cu
!= NULL
)
7517 dwarf2_add_dependence (dependent_cu
, per_cu
);
7519 /* If it's already on the queue, we have nothing to do. */
7523 /* If the compilation unit is already loaded, just mark it as
7525 if (per_cu
->cu
!= NULL
)
7527 per_cu
->cu
->last_used
= 0;
7531 /* Add it to the queue. */
7532 queue_comp_unit (per_cu
, pretend_language
);
7537 /* Process the queue. */
7540 process_queue (void)
7542 struct dwarf2_queue_item
*item
, *next_item
;
7544 if (dwarf_read_debug
)
7546 fprintf_unfiltered (gdb_stdlog
,
7547 "Expanding one or more symtabs of objfile %s ...\n",
7548 objfile_name (dwarf2_per_objfile
->objfile
));
7551 /* The queue starts out with one item, but following a DIE reference
7552 may load a new CU, adding it to the end of the queue. */
7553 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
7555 if ((dwarf2_per_objfile
->using_index
7556 ? !item
->per_cu
->v
.quick
->compunit_symtab
7557 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
7558 /* Skip dummy CUs. */
7559 && item
->per_cu
->cu
!= NULL
)
7561 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
7562 unsigned int debug_print_threshold
;
7565 if (per_cu
->is_debug_types
)
7567 struct signatured_type
*sig_type
=
7568 (struct signatured_type
*) per_cu
;
7570 sprintf (buf
, "TU %s at offset 0x%x",
7571 hex_string (sig_type
->signature
),
7572 per_cu
->offset
.sect_off
);
7573 /* There can be 100s of TUs.
7574 Only print them in verbose mode. */
7575 debug_print_threshold
= 2;
7579 sprintf (buf
, "CU at offset 0x%x", per_cu
->offset
.sect_off
);
7580 debug_print_threshold
= 1;
7583 if (dwarf_read_debug
>= debug_print_threshold
)
7584 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
7586 if (per_cu
->is_debug_types
)
7587 process_full_type_unit (per_cu
, item
->pretend_language
);
7589 process_full_comp_unit (per_cu
, item
->pretend_language
);
7591 if (dwarf_read_debug
>= debug_print_threshold
)
7592 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
7595 item
->per_cu
->queued
= 0;
7596 next_item
= item
->next
;
7600 dwarf2_queue_tail
= NULL
;
7602 if (dwarf_read_debug
)
7604 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
7605 objfile_name (dwarf2_per_objfile
->objfile
));
7609 /* Free all allocated queue entries. This function only releases anything if
7610 an error was thrown; if the queue was processed then it would have been
7611 freed as we went along. */
7614 dwarf2_release_queue (void *dummy
)
7616 struct dwarf2_queue_item
*item
, *last
;
7618 item
= dwarf2_queue
;
7621 /* Anything still marked queued is likely to be in an
7622 inconsistent state, so discard it. */
7623 if (item
->per_cu
->queued
)
7625 if (item
->per_cu
->cu
!= NULL
)
7626 free_one_cached_comp_unit (item
->per_cu
);
7627 item
->per_cu
->queued
= 0;
7635 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
7638 /* Read in full symbols for PST, and anything it depends on. */
7641 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
7643 struct dwarf2_per_cu_data
*per_cu
;
7649 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
7650 if (!pst
->dependencies
[i
]->readin
7651 && pst
->dependencies
[i
]->user
== NULL
)
7653 /* Inform about additional files that need to be read in. */
7656 /* FIXME: i18n: Need to make this a single string. */
7657 fputs_filtered (" ", gdb_stdout
);
7659 fputs_filtered ("and ", gdb_stdout
);
7661 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
7662 wrap_here (""); /* Flush output. */
7663 gdb_flush (gdb_stdout
);
7665 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
7668 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
7672 /* It's an include file, no symbols to read for it.
7673 Everything is in the parent symtab. */
7678 dw2_do_instantiate_symtab (per_cu
);
7681 /* Trivial hash function for die_info: the hash value of a DIE
7682 is its offset in .debug_info for this objfile. */
7685 die_hash (const void *item
)
7687 const struct die_info
*die
= (const struct die_info
*) item
;
7689 return die
->offset
.sect_off
;
7692 /* Trivial comparison function for die_info structures: two DIEs
7693 are equal if they have the same offset. */
7696 die_eq (const void *item_lhs
, const void *item_rhs
)
7698 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
7699 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
7701 return die_lhs
->offset
.sect_off
== die_rhs
->offset
.sect_off
;
7704 /* die_reader_func for load_full_comp_unit.
7705 This is identical to read_signatured_type_reader,
7706 but is kept separate for now. */
7709 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
7710 const gdb_byte
*info_ptr
,
7711 struct die_info
*comp_unit_die
,
7715 struct dwarf2_cu
*cu
= reader
->cu
;
7716 enum language
*language_ptr
= (enum language
*) data
;
7718 gdb_assert (cu
->die_hash
== NULL
);
7720 htab_create_alloc_ex (cu
->header
.length
/ 12,
7724 &cu
->comp_unit_obstack
,
7725 hashtab_obstack_allocate
,
7726 dummy_obstack_deallocate
);
7729 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
7730 &info_ptr
, comp_unit_die
);
7731 cu
->dies
= comp_unit_die
;
7732 /* comp_unit_die is not stored in die_hash, no need. */
7734 /* We try not to read any attributes in this function, because not
7735 all CUs needed for references have been loaded yet, and symbol
7736 table processing isn't initialized. But we have to set the CU language,
7737 or we won't be able to build types correctly.
7738 Similarly, if we do not read the producer, we can not apply
7739 producer-specific interpretation. */
7740 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
7743 /* Load the DIEs associated with PER_CU into memory. */
7746 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
7747 enum language pretend_language
)
7749 gdb_assert (! this_cu
->is_debug_types
);
7751 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
7752 load_full_comp_unit_reader
, &pretend_language
);
7755 /* Add a DIE to the delayed physname list. */
7758 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
7759 const char *name
, struct die_info
*die
,
7760 struct dwarf2_cu
*cu
)
7762 struct delayed_method_info mi
;
7764 mi
.fnfield_index
= fnfield_index
;
7768 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
7771 /* A cleanup for freeing the delayed method list. */
7774 free_delayed_list (void *ptr
)
7776 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
7777 if (cu
->method_list
!= NULL
)
7779 VEC_free (delayed_method_info
, cu
->method_list
);
7780 cu
->method_list
= NULL
;
7784 /* Compute the physnames of any methods on the CU's method list.
7786 The computation of method physnames is delayed in order to avoid the
7787 (bad) condition that one of the method's formal parameters is of an as yet
7791 compute_delayed_physnames (struct dwarf2_cu
*cu
)
7794 struct delayed_method_info
*mi
;
7795 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
7797 const char *physname
;
7798 struct fn_fieldlist
*fn_flp
7799 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
7800 physname
= dwarf2_physname (mi
->name
, mi
->die
, cu
);
7801 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
->index
)
7802 = physname
? physname
: "";
7806 /* Go objects should be embedded in a DW_TAG_module DIE,
7807 and it's not clear if/how imported objects will appear.
7808 To keep Go support simple until that's worked out,
7809 go back through what we've read and create something usable.
7810 We could do this while processing each DIE, and feels kinda cleaner,
7811 but that way is more invasive.
7812 This is to, for example, allow the user to type "p var" or "b main"
7813 without having to specify the package name, and allow lookups
7814 of module.object to work in contexts that use the expression
7818 fixup_go_packaging (struct dwarf2_cu
*cu
)
7820 char *package_name
= NULL
;
7821 struct pending
*list
;
7824 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
7826 for (i
= 0; i
< list
->nsyms
; ++i
)
7828 struct symbol
*sym
= list
->symbol
[i
];
7830 if (SYMBOL_LANGUAGE (sym
) == language_go
7831 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
7833 char *this_package_name
= go_symbol_package_name (sym
);
7835 if (this_package_name
== NULL
)
7837 if (package_name
== NULL
)
7838 package_name
= this_package_name
;
7841 if (strcmp (package_name
, this_package_name
) != 0)
7842 complaint (&symfile_complaints
,
7843 _("Symtab %s has objects from two different Go packages: %s and %s"),
7844 (symbol_symtab (sym
) != NULL
7845 ? symtab_to_filename_for_display
7846 (symbol_symtab (sym
))
7847 : objfile_name (cu
->objfile
)),
7848 this_package_name
, package_name
);
7849 xfree (this_package_name
);
7855 if (package_name
!= NULL
)
7857 struct objfile
*objfile
= cu
->objfile
;
7858 const char *saved_package_name
7859 = (const char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
7861 strlen (package_name
));
7862 struct type
*type
= init_type (objfile
, TYPE_CODE_MODULE
, 0,
7863 saved_package_name
);
7866 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
7868 sym
= allocate_symbol (objfile
);
7869 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
7870 SYMBOL_SET_NAMES (sym
, saved_package_name
,
7871 strlen (saved_package_name
), 0, objfile
);
7872 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
7873 e.g., "main" finds the "main" module and not C's main(). */
7874 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
7875 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
7876 SYMBOL_TYPE (sym
) = type
;
7878 add_symbol_to_list (sym
, &global_symbols
);
7880 xfree (package_name
);
7884 /* Return the symtab for PER_CU. This works properly regardless of
7885 whether we're using the index or psymtabs. */
7887 static struct compunit_symtab
*
7888 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
7890 return (dwarf2_per_objfile
->using_index
7891 ? per_cu
->v
.quick
->compunit_symtab
7892 : per_cu
->v
.psymtab
->compunit_symtab
);
7895 /* A helper function for computing the list of all symbol tables
7896 included by PER_CU. */
7899 recursively_compute_inclusions (VEC (compunit_symtab_ptr
) **result
,
7900 htab_t all_children
, htab_t all_type_symtabs
,
7901 struct dwarf2_per_cu_data
*per_cu
,
7902 struct compunit_symtab
*immediate_parent
)
7906 struct compunit_symtab
*cust
;
7907 struct dwarf2_per_cu_data
*iter
;
7909 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
7912 /* This inclusion and its children have been processed. */
7917 /* Only add a CU if it has a symbol table. */
7918 cust
= get_compunit_symtab (per_cu
);
7921 /* If this is a type unit only add its symbol table if we haven't
7922 seen it yet (type unit per_cu's can share symtabs). */
7923 if (per_cu
->is_debug_types
)
7925 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
7929 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
7930 if (cust
->user
== NULL
)
7931 cust
->user
= immediate_parent
;
7936 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
7937 if (cust
->user
== NULL
)
7938 cust
->user
= immediate_parent
;
7943 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
7946 recursively_compute_inclusions (result
, all_children
,
7947 all_type_symtabs
, iter
, cust
);
7951 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
7955 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
7957 gdb_assert (! per_cu
->is_debug_types
);
7959 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
7962 struct dwarf2_per_cu_data
*per_cu_iter
;
7963 struct compunit_symtab
*compunit_symtab_iter
;
7964 VEC (compunit_symtab_ptr
) *result_symtabs
= NULL
;
7965 htab_t all_children
, all_type_symtabs
;
7966 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
7968 /* If we don't have a symtab, we can just skip this case. */
7972 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
7973 NULL
, xcalloc
, xfree
);
7974 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
7975 NULL
, xcalloc
, xfree
);
7978 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
7982 recursively_compute_inclusions (&result_symtabs
, all_children
,
7983 all_type_symtabs
, per_cu_iter
,
7987 /* Now we have a transitive closure of all the included symtabs. */
7988 len
= VEC_length (compunit_symtab_ptr
, result_symtabs
);
7990 = XOBNEWVEC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
7991 struct compunit_symtab
*, len
+ 1);
7993 VEC_iterate (compunit_symtab_ptr
, result_symtabs
, ix
,
7994 compunit_symtab_iter
);
7996 cust
->includes
[ix
] = compunit_symtab_iter
;
7997 cust
->includes
[len
] = NULL
;
7999 VEC_free (compunit_symtab_ptr
, result_symtabs
);
8000 htab_delete (all_children
);
8001 htab_delete (all_type_symtabs
);
8005 /* Compute the 'includes' field for the symtabs of all the CUs we just
8009 process_cu_includes (void)
8012 struct dwarf2_per_cu_data
*iter
;
8015 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
8019 if (! iter
->is_debug_types
)
8020 compute_compunit_symtab_includes (iter
);
8023 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
8026 /* Generate full symbol information for PER_CU, whose DIEs have
8027 already been loaded into memory. */
8030 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
8031 enum language pretend_language
)
8033 struct dwarf2_cu
*cu
= per_cu
->cu
;
8034 struct objfile
*objfile
= per_cu
->objfile
;
8035 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8036 CORE_ADDR lowpc
, highpc
;
8037 struct compunit_symtab
*cust
;
8038 struct cleanup
*back_to
, *delayed_list_cleanup
;
8040 struct block
*static_block
;
8043 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8046 back_to
= make_cleanup (really_free_pendings
, NULL
);
8047 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
8049 cu
->list_in_scope
= &file_symbols
;
8051 cu
->language
= pretend_language
;
8052 cu
->language_defn
= language_def (cu
->language
);
8054 /* Do line number decoding in read_file_scope () */
8055 process_die (cu
->dies
, cu
);
8057 /* For now fudge the Go package. */
8058 if (cu
->language
== language_go
)
8059 fixup_go_packaging (cu
);
8061 /* Now that we have processed all the DIEs in the CU, all the types
8062 should be complete, and it should now be safe to compute all of the
8064 compute_delayed_physnames (cu
);
8065 do_cleanups (delayed_list_cleanup
);
8067 /* Some compilers don't define a DW_AT_high_pc attribute for the
8068 compilation unit. If the DW_AT_high_pc is missing, synthesize
8069 it, by scanning the DIE's below the compilation unit. */
8070 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
8072 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
8073 static_block
= end_symtab_get_static_block (addr
, 0, 1);
8075 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
8076 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
8077 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
8078 addrmap to help ensure it has an accurate map of pc values belonging to
8080 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
8082 cust
= end_symtab_from_static_block (static_block
,
8083 SECT_OFF_TEXT (objfile
), 0);
8087 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
8089 /* Set symtab language to language from DW_AT_language. If the
8090 compilation is from a C file generated by language preprocessors, do
8091 not set the language if it was already deduced by start_subfile. */
8092 if (!(cu
->language
== language_c
8093 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
8094 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8096 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
8097 produce DW_AT_location with location lists but it can be possibly
8098 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
8099 there were bugs in prologue debug info, fixed later in GCC-4.5
8100 by "unwind info for epilogues" patch (which is not directly related).
8102 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
8103 needed, it would be wrong due to missing DW_AT_producer there.
8105 Still one can confuse GDB by using non-standard GCC compilation
8106 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
8108 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
8109 cust
->locations_valid
= 1;
8111 if (gcc_4_minor
>= 5)
8112 cust
->epilogue_unwind_valid
= 1;
8114 cust
->call_site_htab
= cu
->call_site_htab
;
8117 if (dwarf2_per_objfile
->using_index
)
8118 per_cu
->v
.quick
->compunit_symtab
= cust
;
8121 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8122 pst
->compunit_symtab
= cust
;
8126 /* Push it for inclusion processing later. */
8127 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
8129 do_cleanups (back_to
);
8132 /* Generate full symbol information for type unit PER_CU, whose DIEs have
8133 already been loaded into memory. */
8136 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
8137 enum language pretend_language
)
8139 struct dwarf2_cu
*cu
= per_cu
->cu
;
8140 struct objfile
*objfile
= per_cu
->objfile
;
8141 struct compunit_symtab
*cust
;
8142 struct cleanup
*back_to
, *delayed_list_cleanup
;
8143 struct signatured_type
*sig_type
;
8145 gdb_assert (per_cu
->is_debug_types
);
8146 sig_type
= (struct signatured_type
*) per_cu
;
8149 back_to
= make_cleanup (really_free_pendings
, NULL
);
8150 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
8152 cu
->list_in_scope
= &file_symbols
;
8154 cu
->language
= pretend_language
;
8155 cu
->language_defn
= language_def (cu
->language
);
8157 /* The symbol tables are set up in read_type_unit_scope. */
8158 process_die (cu
->dies
, cu
);
8160 /* For now fudge the Go package. */
8161 if (cu
->language
== language_go
)
8162 fixup_go_packaging (cu
);
8164 /* Now that we have processed all the DIEs in the CU, all the types
8165 should be complete, and it should now be safe to compute all of the
8167 compute_delayed_physnames (cu
);
8168 do_cleanups (delayed_list_cleanup
);
8170 /* TUs share symbol tables.
8171 If this is the first TU to use this symtab, complete the construction
8172 of it with end_expandable_symtab. Otherwise, complete the addition of
8173 this TU's symbols to the existing symtab. */
8174 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
8176 cust
= end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
8177 sig_type
->type_unit_group
->compunit_symtab
= cust
;
8181 /* Set symtab language to language from DW_AT_language. If the
8182 compilation is from a C file generated by language preprocessors,
8183 do not set the language if it was already deduced by
8185 if (!(cu
->language
== language_c
8186 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
8187 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8192 augment_type_symtab ();
8193 cust
= sig_type
->type_unit_group
->compunit_symtab
;
8196 if (dwarf2_per_objfile
->using_index
)
8197 per_cu
->v
.quick
->compunit_symtab
= cust
;
8200 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8201 pst
->compunit_symtab
= cust
;
8205 do_cleanups (back_to
);
8208 /* Process an imported unit DIE. */
8211 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8213 struct attribute
*attr
;
8215 /* For now we don't handle imported units in type units. */
8216 if (cu
->per_cu
->is_debug_types
)
8218 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8219 " supported in type units [in module %s]"),
8220 objfile_name (cu
->objfile
));
8223 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8226 struct dwarf2_per_cu_data
*per_cu
;
8230 offset
= dwarf2_get_ref_die_offset (attr
);
8231 is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
8232 per_cu
= dwarf2_find_containing_comp_unit (offset
, is_dwz
, cu
->objfile
);
8234 /* If necessary, add it to the queue and load its DIEs. */
8235 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
8236 load_full_comp_unit (per_cu
, cu
->language
);
8238 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
8243 /* Reset the in_process bit of a die. */
8246 reset_die_in_process (void *arg
)
8248 struct die_info
*die
= (struct die_info
*) arg
;
8250 die
->in_process
= 0;
8253 /* Process a die and its children. */
8256 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8258 struct cleanup
*in_process
;
8260 /* We should only be processing those not already in process. */
8261 gdb_assert (!die
->in_process
);
8263 die
->in_process
= 1;
8264 in_process
= make_cleanup (reset_die_in_process
,die
);
8268 case DW_TAG_padding
:
8270 case DW_TAG_compile_unit
:
8271 case DW_TAG_partial_unit
:
8272 read_file_scope (die
, cu
);
8274 case DW_TAG_type_unit
:
8275 read_type_unit_scope (die
, cu
);
8277 case DW_TAG_subprogram
:
8278 case DW_TAG_inlined_subroutine
:
8279 read_func_scope (die
, cu
);
8281 case DW_TAG_lexical_block
:
8282 case DW_TAG_try_block
:
8283 case DW_TAG_catch_block
:
8284 read_lexical_block_scope (die
, cu
);
8286 case DW_TAG_GNU_call_site
:
8287 read_call_site_scope (die
, cu
);
8289 case DW_TAG_class_type
:
8290 case DW_TAG_interface_type
:
8291 case DW_TAG_structure_type
:
8292 case DW_TAG_union_type
:
8293 process_structure_scope (die
, cu
);
8295 case DW_TAG_enumeration_type
:
8296 process_enumeration_scope (die
, cu
);
8299 /* These dies have a type, but processing them does not create
8300 a symbol or recurse to process the children. Therefore we can
8301 read them on-demand through read_type_die. */
8302 case DW_TAG_subroutine_type
:
8303 case DW_TAG_set_type
:
8304 case DW_TAG_array_type
:
8305 case DW_TAG_pointer_type
:
8306 case DW_TAG_ptr_to_member_type
:
8307 case DW_TAG_reference_type
:
8308 case DW_TAG_string_type
:
8311 case DW_TAG_base_type
:
8312 case DW_TAG_subrange_type
:
8313 case DW_TAG_typedef
:
8314 /* Add a typedef symbol for the type definition, if it has a
8316 new_symbol (die
, read_type_die (die
, cu
), cu
);
8318 case DW_TAG_common_block
:
8319 read_common_block (die
, cu
);
8321 case DW_TAG_common_inclusion
:
8323 case DW_TAG_namespace
:
8324 cu
->processing_has_namespace_info
= 1;
8325 read_namespace (die
, cu
);
8328 cu
->processing_has_namespace_info
= 1;
8329 read_module (die
, cu
);
8331 case DW_TAG_imported_declaration
:
8332 cu
->processing_has_namespace_info
= 1;
8333 if (read_namespace_alias (die
, cu
))
8335 /* The declaration is not a global namespace alias: fall through. */
8336 case DW_TAG_imported_module
:
8337 cu
->processing_has_namespace_info
= 1;
8338 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
8339 || cu
->language
!= language_fortran
))
8340 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
8341 dwarf_tag_name (die
->tag
));
8342 read_import_statement (die
, cu
);
8345 case DW_TAG_imported_unit
:
8346 process_imported_unit_die (die
, cu
);
8350 new_symbol (die
, NULL
, cu
);
8354 do_cleanups (in_process
);
8357 /* DWARF name computation. */
8359 /* A helper function for dwarf2_compute_name which determines whether DIE
8360 needs to have the name of the scope prepended to the name listed in the
8364 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
8366 struct attribute
*attr
;
8370 case DW_TAG_namespace
:
8371 case DW_TAG_typedef
:
8372 case DW_TAG_class_type
:
8373 case DW_TAG_interface_type
:
8374 case DW_TAG_structure_type
:
8375 case DW_TAG_union_type
:
8376 case DW_TAG_enumeration_type
:
8377 case DW_TAG_enumerator
:
8378 case DW_TAG_subprogram
:
8379 case DW_TAG_inlined_subroutine
:
8381 case DW_TAG_imported_declaration
:
8384 case DW_TAG_variable
:
8385 case DW_TAG_constant
:
8386 /* We only need to prefix "globally" visible variables. These include
8387 any variable marked with DW_AT_external or any variable that
8388 lives in a namespace. [Variables in anonymous namespaces
8389 require prefixing, but they are not DW_AT_external.] */
8391 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
8393 struct dwarf2_cu
*spec_cu
= cu
;
8395 return die_needs_namespace (die_specification (die
, &spec_cu
),
8399 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
8400 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
8401 && die
->parent
->tag
!= DW_TAG_module
)
8403 /* A variable in a lexical block of some kind does not need a
8404 namespace, even though in C++ such variables may be external
8405 and have a mangled name. */
8406 if (die
->parent
->tag
== DW_TAG_lexical_block
8407 || die
->parent
->tag
== DW_TAG_try_block
8408 || die
->parent
->tag
== DW_TAG_catch_block
8409 || die
->parent
->tag
== DW_TAG_subprogram
)
8418 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
8419 compute the physname for the object, which include a method's:
8420 - formal parameters (C++),
8421 - receiver type (Go),
8423 The term "physname" is a bit confusing.
8424 For C++, for example, it is the demangled name.
8425 For Go, for example, it's the mangled name.
8427 For Ada, return the DIE's linkage name rather than the fully qualified
8428 name. PHYSNAME is ignored..
8430 The result is allocated on the objfile_obstack and canonicalized. */
8433 dwarf2_compute_name (const char *name
,
8434 struct die_info
*die
, struct dwarf2_cu
*cu
,
8437 struct objfile
*objfile
= cu
->objfile
;
8440 name
= dwarf2_name (die
, cu
);
8442 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
8443 but otherwise compute it by typename_concat inside GDB.
8444 FIXME: Actually this is not really true, or at least not always true.
8445 It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle
8446 Fortran names because there is no mangling standard. So new_symbol_full
8447 will set the demangled name to the result of dwarf2_full_name, and it is
8448 the demangled name that GDB uses if it exists. */
8449 if (cu
->language
== language_ada
8450 || (cu
->language
== language_fortran
&& physname
))
8452 /* For Ada unit, we prefer the linkage name over the name, as
8453 the former contains the exported name, which the user expects
8454 to be able to reference. Ideally, we want the user to be able
8455 to reference this entity using either natural or linkage name,
8456 but we haven't started looking at this enhancement yet. */
8457 const char *linkage_name
;
8459 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
8460 if (linkage_name
== NULL
)
8461 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8462 if (linkage_name
!= NULL
)
8463 return linkage_name
;
8466 /* These are the only languages we know how to qualify names in. */
8468 && (cu
->language
== language_cplus
8469 || cu
->language
== language_fortran
|| cu
->language
== language_d
8470 || cu
->language
== language_rust
))
8472 if (die_needs_namespace (die
, cu
))
8476 const char *canonical_name
= NULL
;
8480 prefix
= determine_prefix (die
, cu
);
8481 if (*prefix
!= '\0')
8483 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
8486 buf
.puts (prefixed_name
);
8487 xfree (prefixed_name
);
8492 /* Template parameters may be specified in the DIE's DW_AT_name, or
8493 as children with DW_TAG_template_type_param or
8494 DW_TAG_value_type_param. If the latter, add them to the name
8495 here. If the name already has template parameters, then
8496 skip this step; some versions of GCC emit both, and
8497 it is more efficient to use the pre-computed name.
8499 Something to keep in mind about this process: it is very
8500 unlikely, or in some cases downright impossible, to produce
8501 something that will match the mangled name of a function.
8502 If the definition of the function has the same debug info,
8503 we should be able to match up with it anyway. But fallbacks
8504 using the minimal symbol, for instance to find a method
8505 implemented in a stripped copy of libstdc++, will not work.
8506 If we do not have debug info for the definition, we will have to
8507 match them up some other way.
8509 When we do name matching there is a related problem with function
8510 templates; two instantiated function templates are allowed to
8511 differ only by their return types, which we do not add here. */
8513 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
8515 struct attribute
*attr
;
8516 struct die_info
*child
;
8519 die
->building_fullname
= 1;
8521 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
8525 const gdb_byte
*bytes
;
8526 struct dwarf2_locexpr_baton
*baton
;
8529 if (child
->tag
!= DW_TAG_template_type_param
8530 && child
->tag
!= DW_TAG_template_value_param
)
8541 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
8544 complaint (&symfile_complaints
,
8545 _("template parameter missing DW_AT_type"));
8546 buf
.puts ("UNKNOWN_TYPE");
8549 type
= die_type (child
, cu
);
8551 if (child
->tag
== DW_TAG_template_type_param
)
8553 c_print_type (type
, "", &buf
, -1, 0, &type_print_raw_options
);
8557 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
8560 complaint (&symfile_complaints
,
8561 _("template parameter missing "
8562 "DW_AT_const_value"));
8563 buf
.puts ("UNKNOWN_VALUE");
8567 dwarf2_const_value_attr (attr
, type
, name
,
8568 &cu
->comp_unit_obstack
, cu
,
8569 &value
, &bytes
, &baton
);
8571 if (TYPE_NOSIGN (type
))
8572 /* GDB prints characters as NUMBER 'CHAR'. If that's
8573 changed, this can use value_print instead. */
8574 c_printchar (value
, type
, &buf
);
8577 struct value_print_options opts
;
8580 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
8584 else if (bytes
!= NULL
)
8586 v
= allocate_value (type
);
8587 memcpy (value_contents_writeable (v
), bytes
,
8588 TYPE_LENGTH (type
));
8591 v
= value_from_longest (type
, value
);
8593 /* Specify decimal so that we do not depend on
8595 get_formatted_print_options (&opts
, 'd');
8597 value_print (v
, &buf
, &opts
);
8603 die
->building_fullname
= 0;
8607 /* Close the argument list, with a space if necessary
8608 (nested templates). */
8609 if (!buf
.empty () && buf
.string ().back () == '>')
8616 /* For C++ methods, append formal parameter type
8617 information, if PHYSNAME. */
8619 if (physname
&& die
->tag
== DW_TAG_subprogram
8620 && cu
->language
== language_cplus
)
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_cplus
)
8629 /* Assume that an artificial first parameter is
8630 "this", but do not crash if it is not. RealView
8631 marks unnamed (and thus unused) parameters as
8632 artificial; there is no way to differentiate
8634 if (TYPE_NFIELDS (type
) > 0
8635 && TYPE_FIELD_ARTIFICIAL (type
, 0)
8636 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
8637 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
8639 buf
.puts (" const");
8643 const std::string
&intermediate_name
= buf
.string ();
8645 if (cu
->language
== language_cplus
)
8647 = dwarf2_canonicalize_name (intermediate_name
.c_str (), cu
,
8648 &objfile
->per_bfd
->storage_obstack
);
8650 /* If we only computed INTERMEDIATE_NAME, or if
8651 INTERMEDIATE_NAME is already canonical, then we need to
8652 copy it to the appropriate obstack. */
8653 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
.c_str ())
8654 name
= ((const char *)
8655 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8656 intermediate_name
.c_str (),
8657 intermediate_name
.length ()));
8659 name
= canonical_name
;
8666 /* Return the fully qualified name of DIE, based on its DW_AT_name.
8667 If scope qualifiers are appropriate they will be added. The result
8668 will be allocated on the storage_obstack, or NULL if the DIE does
8669 not have a name. NAME may either be from a previous call to
8670 dwarf2_name or NULL.
8672 The output string will be canonicalized (if C++). */
8675 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
8677 return dwarf2_compute_name (name
, die
, cu
, 0);
8680 /* Construct a physname for the given DIE in CU. NAME may either be
8681 from a previous call to dwarf2_name or NULL. The result will be
8682 allocated on the objfile_objstack or NULL if the DIE does not have a
8685 The output string will be canonicalized (if C++). */
8688 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
8690 struct objfile
*objfile
= cu
->objfile
;
8691 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
8692 struct cleanup
*back_to
;
8695 /* In this case dwarf2_compute_name is just a shortcut not building anything
8697 if (!die_needs_namespace (die
, cu
))
8698 return dwarf2_compute_name (name
, die
, cu
, 1);
8700 back_to
= make_cleanup (null_cleanup
, NULL
);
8702 mangled
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
8703 if (mangled
== NULL
)
8704 mangled
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8706 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
8707 See https://github.com/rust-lang/rust/issues/32925. */
8708 if (cu
->language
== language_rust
&& mangled
!= NULL
8709 && strchr (mangled
, '{') != NULL
)
8712 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
8714 if (mangled
!= NULL
)
8718 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
8719 type. It is easier for GDB users to search for such functions as
8720 `name(params)' than `long name(params)'. In such case the minimal
8721 symbol names do not match the full symbol names but for template
8722 functions there is never a need to look up their definition from their
8723 declaration so the only disadvantage remains the minimal symbol
8724 variant `long name(params)' does not have the proper inferior type.
8727 if (cu
->language
== language_go
)
8729 /* This is a lie, but we already lie to the caller new_symbol_full.
8730 new_symbol_full assumes we return the mangled name.
8731 This just undoes that lie until things are cleaned up. */
8736 demangled
= gdb_demangle (mangled
,
8737 (DMGL_PARAMS
| DMGL_ANSI
| DMGL_RET_DROP
));
8741 make_cleanup (xfree
, demangled
);
8751 if (canon
== NULL
|| check_physname
)
8753 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
8755 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
8757 /* It may not mean a bug in GDB. The compiler could also
8758 compute DW_AT_linkage_name incorrectly. But in such case
8759 GDB would need to be bug-to-bug compatible. */
8761 complaint (&symfile_complaints
,
8762 _("Computed physname <%s> does not match demangled <%s> "
8763 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
8764 physname
, canon
, mangled
, die
->offset
.sect_off
,
8765 objfile_name (objfile
));
8767 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
8768 is available here - over computed PHYSNAME. It is safer
8769 against both buggy GDB and buggy compilers. */
8783 retval
= ((const char *)
8784 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8785 retval
, strlen (retval
)));
8787 do_cleanups (back_to
);
8791 /* Inspect DIE in CU for a namespace alias. If one exists, record
8792 a new symbol for it.
8794 Returns 1 if a namespace alias was recorded, 0 otherwise. */
8797 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
8799 struct attribute
*attr
;
8801 /* If the die does not have a name, this is not a namespace
8803 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
8807 struct die_info
*d
= die
;
8808 struct dwarf2_cu
*imported_cu
= cu
;
8810 /* If the compiler has nested DW_AT_imported_declaration DIEs,
8811 keep inspecting DIEs until we hit the underlying import. */
8812 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
8813 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
8815 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
8819 d
= follow_die_ref (d
, attr
, &imported_cu
);
8820 if (d
->tag
!= DW_TAG_imported_declaration
)
8824 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
8826 complaint (&symfile_complaints
,
8827 _("DIE at 0x%x has too many recursively imported "
8828 "declarations"), d
->offset
.sect_off
);
8835 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
8837 type
= get_die_type_at_offset (offset
, cu
->per_cu
);
8838 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
8840 /* This declaration is a global namespace alias. Add
8841 a symbol for it whose type is the aliased namespace. */
8842 new_symbol (die
, type
, cu
);
8851 /* Return the using directives repository (global or local?) to use in the
8852 current context for LANGUAGE.
8854 For Ada, imported declarations can materialize renamings, which *may* be
8855 global. However it is impossible (for now?) in DWARF to distinguish
8856 "external" imported declarations and "static" ones. As all imported
8857 declarations seem to be static in all other languages, make them all CU-wide
8858 global only in Ada. */
8860 static struct using_direct
**
8861 using_directives (enum language language
)
8863 if (language
== language_ada
&& context_stack_depth
== 0)
8864 return &global_using_directives
;
8866 return &local_using_directives
;
8869 /* Read the import statement specified by the given die and record it. */
8872 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
8874 struct objfile
*objfile
= cu
->objfile
;
8875 struct attribute
*import_attr
;
8876 struct die_info
*imported_die
, *child_die
;
8877 struct dwarf2_cu
*imported_cu
;
8878 const char *imported_name
;
8879 const char *imported_name_prefix
;
8880 const char *canonical_name
;
8881 const char *import_alias
;
8882 const char *imported_declaration
= NULL
;
8883 const char *import_prefix
;
8884 VEC (const_char_ptr
) *excludes
= NULL
;
8885 struct cleanup
*cleanups
;
8887 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8888 if (import_attr
== NULL
)
8890 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
8891 dwarf_tag_name (die
->tag
));
8896 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
8897 imported_name
= dwarf2_name (imported_die
, imported_cu
);
8898 if (imported_name
== NULL
)
8900 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
8902 The import in the following code:
8916 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
8917 <52> DW_AT_decl_file : 1
8918 <53> DW_AT_decl_line : 6
8919 <54> DW_AT_import : <0x75>
8920 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
8922 <5b> DW_AT_decl_file : 1
8923 <5c> DW_AT_decl_line : 2
8924 <5d> DW_AT_type : <0x6e>
8926 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
8927 <76> DW_AT_byte_size : 4
8928 <77> DW_AT_encoding : 5 (signed)
8930 imports the wrong die ( 0x75 instead of 0x58 ).
8931 This case will be ignored until the gcc bug is fixed. */
8935 /* Figure out the local name after import. */
8936 import_alias
= dwarf2_name (die
, cu
);
8938 /* Figure out where the statement is being imported to. */
8939 import_prefix
= determine_prefix (die
, cu
);
8941 /* Figure out what the scope of the imported die is and prepend it
8942 to the name of the imported die. */
8943 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
8945 if (imported_die
->tag
!= DW_TAG_namespace
8946 && imported_die
->tag
!= DW_TAG_module
)
8948 imported_declaration
= imported_name
;
8949 canonical_name
= imported_name_prefix
;
8951 else if (strlen (imported_name_prefix
) > 0)
8952 canonical_name
= obconcat (&objfile
->objfile_obstack
,
8953 imported_name_prefix
,
8954 (cu
->language
== language_d
? "." : "::"),
8955 imported_name
, (char *) NULL
);
8957 canonical_name
= imported_name
;
8959 cleanups
= make_cleanup (VEC_cleanup (const_char_ptr
), &excludes
);
8961 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
8962 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
8963 child_die
= sibling_die (child_die
))
8965 /* DWARF-4: A Fortran use statement with a “rename list” may be
8966 represented by an imported module entry with an import attribute
8967 referring to the module and owned entries corresponding to those
8968 entities that are renamed as part of being imported. */
8970 if (child_die
->tag
!= DW_TAG_imported_declaration
)
8972 complaint (&symfile_complaints
,
8973 _("child DW_TAG_imported_declaration expected "
8974 "- DIE at 0x%x [in module %s]"),
8975 child_die
->offset
.sect_off
, objfile_name (objfile
));
8979 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
8980 if (import_attr
== NULL
)
8982 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
8983 dwarf_tag_name (child_die
->tag
));
8988 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
8990 imported_name
= dwarf2_name (imported_die
, imported_cu
);
8991 if (imported_name
== NULL
)
8993 complaint (&symfile_complaints
,
8994 _("child DW_TAG_imported_declaration has unknown "
8995 "imported name - DIE at 0x%x [in module %s]"),
8996 child_die
->offset
.sect_off
, objfile_name (objfile
));
9000 VEC_safe_push (const_char_ptr
, excludes
, imported_name
);
9002 process_die (child_die
, cu
);
9005 add_using_directive (using_directives (cu
->language
),
9009 imported_declaration
,
9012 &objfile
->objfile_obstack
);
9014 do_cleanups (cleanups
);
9017 /* Cleanup function for handle_DW_AT_stmt_list. */
9020 free_cu_line_header (void *arg
)
9022 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) arg
;
9024 free_line_header (cu
->line_header
);
9025 cu
->line_header
= NULL
;
9028 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
9029 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
9030 this, it was first present in GCC release 4.3.0. */
9033 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
9035 if (!cu
->checked_producer
)
9036 check_producer (cu
);
9038 return cu
->producer_is_gcc_lt_4_3
;
9042 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
9043 const char **name
, const char **comp_dir
)
9045 /* Find the filename. Do not use dwarf2_name here, since the filename
9046 is not a source language identifier. */
9047 *name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
9048 *comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
9050 if (*comp_dir
== NULL
9051 && producer_is_gcc_lt_4_3 (cu
) && *name
!= NULL
9052 && IS_ABSOLUTE_PATH (*name
))
9054 char *d
= ldirname (*name
);
9058 make_cleanup (xfree
, d
);
9060 if (*comp_dir
!= NULL
)
9062 /* Irix 6.2 native cc prepends <machine>.: to the compilation
9063 directory, get rid of it. */
9064 const char *cp
= strchr (*comp_dir
, ':');
9066 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
9071 *name
= "<unknown>";
9074 /* Handle DW_AT_stmt_list for a compilation unit.
9075 DIE is the DW_TAG_compile_unit die for CU.
9076 COMP_DIR is the compilation directory. LOWPC is passed to
9077 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
9080 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
9081 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
9083 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9084 struct attribute
*attr
;
9085 unsigned int line_offset
;
9086 struct line_header line_header_local
;
9087 hashval_t line_header_local_hash
;
9092 gdb_assert (! cu
->per_cu
->is_debug_types
);
9094 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9098 line_offset
= DW_UNSND (attr
);
9100 /* The line header hash table is only created if needed (it exists to
9101 prevent redundant reading of the line table for partial_units).
9102 If we're given a partial_unit, we'll need it. If we're given a
9103 compile_unit, then use the line header hash table if it's already
9104 created, but don't create one just yet. */
9106 if (dwarf2_per_objfile
->line_header_hash
== NULL
9107 && die
->tag
== DW_TAG_partial_unit
)
9109 dwarf2_per_objfile
->line_header_hash
9110 = htab_create_alloc_ex (127, line_header_hash_voidp
,
9111 line_header_eq_voidp
,
9112 free_line_header_voidp
,
9113 &objfile
->objfile_obstack
,
9114 hashtab_obstack_allocate
,
9115 dummy_obstack_deallocate
);
9118 line_header_local
.offset
.sect_off
= line_offset
;
9119 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
9120 line_header_local_hash
= line_header_hash (&line_header_local
);
9121 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
9123 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
9125 line_header_local_hash
, NO_INSERT
);
9127 /* For DW_TAG_compile_unit we need info like symtab::linetable which
9128 is not present in *SLOT (since if there is something in *SLOT then
9129 it will be for a partial_unit). */
9130 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
9132 gdb_assert (*slot
!= NULL
);
9133 cu
->line_header
= (struct line_header
*) *slot
;
9138 /* dwarf_decode_line_header does not yet provide sufficient information.
9139 We always have to call also dwarf_decode_lines for it. */
9140 cu
->line_header
= dwarf_decode_line_header (line_offset
, cu
);
9141 if (cu
->line_header
== NULL
)
9144 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
9148 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
9150 line_header_local_hash
, INSERT
);
9151 gdb_assert (slot
!= NULL
);
9153 if (slot
!= NULL
&& *slot
== NULL
)
9155 /* This newly decoded line number information unit will be owned
9156 by line_header_hash hash table. */
9157 *slot
= cu
->line_header
;
9161 /* We cannot free any current entry in (*slot) as that struct line_header
9162 may be already used by multiple CUs. Create only temporary decoded
9163 line_header for this CU - it may happen at most once for each line
9164 number information unit. And if we're not using line_header_hash
9165 then this is what we want as well. */
9166 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
9167 make_cleanup (free_cu_line_header
, cu
);
9169 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
9170 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
9174 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
9177 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9179 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9180 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9181 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
9182 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
9183 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
9184 struct attribute
*attr
;
9185 const char *name
= NULL
;
9186 const char *comp_dir
= NULL
;
9187 struct die_info
*child_die
;
9190 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9192 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
9194 /* If we didn't find a lowpc, set it to highpc to avoid complaints
9195 from finish_block. */
9196 if (lowpc
== ((CORE_ADDR
) -1))
9198 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
9200 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
9202 prepare_one_comp_unit (cu
, die
, cu
->language
);
9204 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
9205 standardised yet. As a workaround for the language detection we fall
9206 back to the DW_AT_producer string. */
9207 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
9208 cu
->language
= language_opencl
;
9210 /* Similar hack for Go. */
9211 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
9212 set_cu_language (DW_LANG_Go
, cu
);
9214 dwarf2_start_symtab (cu
, name
, comp_dir
, lowpc
);
9216 /* Decode line number information if present. We do this before
9217 processing child DIEs, so that the line header table is available
9218 for DW_AT_decl_file. */
9219 handle_DW_AT_stmt_list (die
, cu
, comp_dir
, lowpc
);
9221 /* Process all dies in compilation unit. */
9222 if (die
->child
!= NULL
)
9224 child_die
= die
->child
;
9225 while (child_die
&& child_die
->tag
)
9227 process_die (child_die
, cu
);
9228 child_die
= sibling_die (child_die
);
9232 /* Decode macro information, if present. Dwarf 2 macro information
9233 refers to information in the line number info statement program
9234 header, so we can only read it if we've read the header
9236 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
9237 if (attr
&& cu
->line_header
)
9239 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
9240 complaint (&symfile_complaints
,
9241 _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
9243 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
9247 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
9248 if (attr
&& cu
->line_header
)
9250 unsigned int macro_offset
= DW_UNSND (attr
);
9252 dwarf_decode_macros (cu
, macro_offset
, 0);
9256 do_cleanups (back_to
);
9259 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
9260 Create the set of symtabs used by this TU, or if this TU is sharing
9261 symtabs with another TU and the symtabs have already been created
9262 then restore those symtabs in the line header.
9263 We don't need the pc/line-number mapping for type units. */
9266 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
9268 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
9269 struct type_unit_group
*tu_group
;
9271 struct line_header
*lh
;
9272 struct attribute
*attr
;
9273 unsigned int i
, line_offset
;
9274 struct signatured_type
*sig_type
;
9276 gdb_assert (per_cu
->is_debug_types
);
9277 sig_type
= (struct signatured_type
*) per_cu
;
9279 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9281 /* If we're using .gdb_index (includes -readnow) then
9282 per_cu->type_unit_group may not have been set up yet. */
9283 if (sig_type
->type_unit_group
== NULL
)
9284 sig_type
->type_unit_group
= get_type_unit_group (cu
, attr
);
9285 tu_group
= sig_type
->type_unit_group
;
9287 /* If we've already processed this stmt_list there's no real need to
9288 do it again, we could fake it and just recreate the part we need
9289 (file name,index -> symtab mapping). If data shows this optimization
9290 is useful we can do it then. */
9291 first_time
= tu_group
->compunit_symtab
== NULL
;
9293 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
9298 line_offset
= DW_UNSND (attr
);
9299 lh
= dwarf_decode_line_header (line_offset
, cu
);
9304 dwarf2_start_symtab (cu
, "", NULL
, 0);
9307 gdb_assert (tu_group
->symtabs
== NULL
);
9308 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9313 cu
->line_header
= lh
;
9314 make_cleanup (free_cu_line_header
, cu
);
9318 struct compunit_symtab
*cust
= dwarf2_start_symtab (cu
, "", NULL
, 0);
9320 /* Note: We don't assign tu_group->compunit_symtab yet because we're
9321 still initializing it, and our caller (a few levels up)
9322 process_full_type_unit still needs to know if this is the first
9325 tu_group
->num_symtabs
= lh
->num_file_names
;
9326 tu_group
->symtabs
= XNEWVEC (struct symtab
*, lh
->num_file_names
);
9328 for (i
= 0; i
< lh
->num_file_names
; ++i
)
9330 const char *dir
= NULL
;
9331 struct file_entry
*fe
= &lh
->file_names
[i
];
9333 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
9334 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
9335 dwarf2_start_subfile (fe
->name
, dir
);
9337 if (current_subfile
->symtab
== NULL
)
9339 /* NOTE: start_subfile will recognize when it's been passed
9340 a file it has already seen. So we can't assume there's a
9341 simple mapping from lh->file_names to subfiles, plus
9342 lh->file_names may contain dups. */
9343 current_subfile
->symtab
9344 = allocate_symtab (cust
, current_subfile
->name
);
9347 fe
->symtab
= current_subfile
->symtab
;
9348 tu_group
->symtabs
[i
] = fe
->symtab
;
9353 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9355 for (i
= 0; i
< lh
->num_file_names
; ++i
)
9357 struct file_entry
*fe
= &lh
->file_names
[i
];
9359 fe
->symtab
= tu_group
->symtabs
[i
];
9363 /* The main symtab is allocated last. Type units don't have DW_AT_name
9364 so they don't have a "real" (so to speak) symtab anyway.
9365 There is later code that will assign the main symtab to all symbols
9366 that don't have one. We need to handle the case of a symbol with a
9367 missing symtab (DW_AT_decl_file) anyway. */
9370 /* Process DW_TAG_type_unit.
9371 For TUs we want to skip the first top level sibling if it's not the
9372 actual type being defined by this TU. In this case the first top
9373 level sibling is there to provide context only. */
9376 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9378 struct die_info
*child_die
;
9380 prepare_one_comp_unit (cu
, die
, language_minimal
);
9382 /* Initialize (or reinitialize) the machinery for building symtabs.
9383 We do this before processing child DIEs, so that the line header table
9384 is available for DW_AT_decl_file. */
9385 setup_type_unit_groups (die
, cu
);
9387 if (die
->child
!= NULL
)
9389 child_die
= die
->child
;
9390 while (child_die
&& child_die
->tag
)
9392 process_die (child_die
, cu
);
9393 child_die
= sibling_die (child_die
);
9400 http://gcc.gnu.org/wiki/DebugFission
9401 http://gcc.gnu.org/wiki/DebugFissionDWP
9403 To simplify handling of both DWO files ("object" files with the DWARF info)
9404 and DWP files (a file with the DWOs packaged up into one file), we treat
9405 DWP files as having a collection of virtual DWO files. */
9408 hash_dwo_file (const void *item
)
9410 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
9413 hash
= htab_hash_string (dwo_file
->dwo_name
);
9414 if (dwo_file
->comp_dir
!= NULL
)
9415 hash
+= htab_hash_string (dwo_file
->comp_dir
);
9420 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
9422 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
9423 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
9425 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
9427 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
9428 return lhs
->comp_dir
== rhs
->comp_dir
;
9429 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
9432 /* Allocate a hash table for DWO files. */
9435 allocate_dwo_file_hash_table (void)
9437 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9439 return htab_create_alloc_ex (41,
9443 &objfile
->objfile_obstack
,
9444 hashtab_obstack_allocate
,
9445 dummy_obstack_deallocate
);
9448 /* Lookup DWO file DWO_NAME. */
9451 lookup_dwo_file_slot (const char *dwo_name
, const char *comp_dir
)
9453 struct dwo_file find_entry
;
9456 if (dwarf2_per_objfile
->dwo_files
== NULL
)
9457 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
9459 memset (&find_entry
, 0, sizeof (find_entry
));
9460 find_entry
.dwo_name
= dwo_name
;
9461 find_entry
.comp_dir
= comp_dir
;
9462 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
9468 hash_dwo_unit (const void *item
)
9470 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
9472 /* This drops the top 32 bits of the id, but is ok for a hash. */
9473 return dwo_unit
->signature
;
9477 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
9479 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
9480 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
9482 /* The signature is assumed to be unique within the DWO file.
9483 So while object file CU dwo_id's always have the value zero,
9484 that's OK, assuming each object file DWO file has only one CU,
9485 and that's the rule for now. */
9486 return lhs
->signature
== rhs
->signature
;
9489 /* Allocate a hash table for DWO CUs,TUs.
9490 There is one of these tables for each of CUs,TUs for each DWO file. */
9493 allocate_dwo_unit_table (struct objfile
*objfile
)
9495 /* Start out with a pretty small number.
9496 Generally DWO files contain only one CU and maybe some TUs. */
9497 return htab_create_alloc_ex (3,
9501 &objfile
->objfile_obstack
,
9502 hashtab_obstack_allocate
,
9503 dummy_obstack_deallocate
);
9506 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
9508 struct create_dwo_cu_data
9510 struct dwo_file
*dwo_file
;
9511 struct dwo_unit dwo_unit
;
9514 /* die_reader_func for create_dwo_cu. */
9517 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
9518 const gdb_byte
*info_ptr
,
9519 struct die_info
*comp_unit_die
,
9523 struct dwarf2_cu
*cu
= reader
->cu
;
9524 sect_offset offset
= cu
->per_cu
->offset
;
9525 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
9526 struct create_dwo_cu_data
*data
= (struct create_dwo_cu_data
*) datap
;
9527 struct dwo_file
*dwo_file
= data
->dwo_file
;
9528 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
9529 struct attribute
*attr
;
9531 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
9534 complaint (&symfile_complaints
,
9535 _("Dwarf Error: debug entry at offset 0x%x is missing"
9536 " its dwo_id [in module %s]"),
9537 offset
.sect_off
, dwo_file
->dwo_name
);
9541 dwo_unit
->dwo_file
= dwo_file
;
9542 dwo_unit
->signature
= DW_UNSND (attr
);
9543 dwo_unit
->section
= section
;
9544 dwo_unit
->offset
= offset
;
9545 dwo_unit
->length
= cu
->per_cu
->length
;
9547 if (dwarf_read_debug
)
9548 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, dwo_id %s\n",
9549 offset
.sect_off
, hex_string (dwo_unit
->signature
));
9552 /* Create the dwo_unit for the lone CU in DWO_FILE.
9553 Note: This function processes DWO files only, not DWP files. */
9555 static struct dwo_unit
*
9556 create_dwo_cu (struct dwo_file
*dwo_file
)
9558 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9559 struct dwarf2_section_info
*section
= &dwo_file
->sections
.info
;
9560 const gdb_byte
*info_ptr
, *end_ptr
;
9561 struct create_dwo_cu_data create_dwo_cu_data
;
9562 struct dwo_unit
*dwo_unit
;
9564 dwarf2_read_section (objfile
, section
);
9565 info_ptr
= section
->buffer
;
9567 if (info_ptr
== NULL
)
9570 if (dwarf_read_debug
)
9572 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
9573 get_section_name (section
),
9574 get_section_file_name (section
));
9577 create_dwo_cu_data
.dwo_file
= dwo_file
;
9580 end_ptr
= info_ptr
+ section
->size
;
9581 while (info_ptr
< end_ptr
)
9583 struct dwarf2_per_cu_data per_cu
;
9585 memset (&create_dwo_cu_data
.dwo_unit
, 0,
9586 sizeof (create_dwo_cu_data
.dwo_unit
));
9587 memset (&per_cu
, 0, sizeof (per_cu
));
9588 per_cu
.objfile
= objfile
;
9589 per_cu
.is_debug_types
= 0;
9590 per_cu
.offset
.sect_off
= info_ptr
- section
->buffer
;
9591 per_cu
.section
= section
;
9593 init_cutu_and_read_dies_no_follow (&per_cu
, dwo_file
,
9594 create_dwo_cu_reader
,
9595 &create_dwo_cu_data
);
9597 if (create_dwo_cu_data
.dwo_unit
.dwo_file
!= NULL
)
9599 /* If we've already found one, complain. We only support one
9600 because having more than one requires hacking the dwo_name of
9601 each to match, which is highly unlikely to happen. */
9602 if (dwo_unit
!= NULL
)
9604 complaint (&symfile_complaints
,
9605 _("Multiple CUs in DWO file %s [in module %s]"),
9606 dwo_file
->dwo_name
, objfile_name (objfile
));
9610 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
9611 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
9614 info_ptr
+= per_cu
.length
;
9620 /* DWP file .debug_{cu,tu}_index section format:
9621 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
9625 Both index sections have the same format, and serve to map a 64-bit
9626 signature to a set of section numbers. Each section begins with a header,
9627 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
9628 indexes, and a pool of 32-bit section numbers. The index sections will be
9629 aligned at 8-byte boundaries in the file.
9631 The index section header consists of:
9633 V, 32 bit version number
9635 N, 32 bit number of compilation units or type units in the index
9636 M, 32 bit number of slots in the hash table
9638 Numbers are recorded using the byte order of the application binary.
9640 The hash table begins at offset 16 in the section, and consists of an array
9641 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
9642 order of the application binary). Unused slots in the hash table are 0.
9643 (We rely on the extreme unlikeliness of a signature being exactly 0.)
9645 The parallel table begins immediately after the hash table
9646 (at offset 16 + 8 * M from the beginning of the section), and consists of an
9647 array of 32-bit indexes (using the byte order of the application binary),
9648 corresponding 1-1 with slots in the hash table. Each entry in the parallel
9649 table contains a 32-bit index into the pool of section numbers. For unused
9650 hash table slots, the corresponding entry in the parallel table will be 0.
9652 The pool of section numbers begins immediately following the hash table
9653 (at offset 16 + 12 * M from the beginning of the section). The pool of
9654 section numbers consists of an array of 32-bit words (using the byte order
9655 of the application binary). Each item in the array is indexed starting
9656 from 0. The hash table entry provides the index of the first section
9657 number in the set. Additional section numbers in the set follow, and the
9658 set is terminated by a 0 entry (section number 0 is not used in ELF).
9660 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
9661 section must be the first entry in the set, and the .debug_abbrev.dwo must
9662 be the second entry. Other members of the set may follow in any order.
9668 DWP Version 2 combines all the .debug_info, etc. sections into one,
9669 and the entries in the index tables are now offsets into these sections.
9670 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
9673 Index Section Contents:
9675 Hash Table of Signatures dwp_hash_table.hash_table
9676 Parallel Table of Indices dwp_hash_table.unit_table
9677 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
9678 Table of Section Sizes dwp_hash_table.v2.sizes
9680 The index section header consists of:
9682 V, 32 bit version number
9683 L, 32 bit number of columns in the table of section offsets
9684 N, 32 bit number of compilation units or type units in the index
9685 M, 32 bit number of slots in the hash table
9687 Numbers are recorded using the byte order of the application binary.
9689 The hash table has the same format as version 1.
9690 The parallel table of indices has the same format as version 1,
9691 except that the entries are origin-1 indices into the table of sections
9692 offsets and the table of section sizes.
9694 The table of offsets begins immediately following the parallel table
9695 (at offset 16 + 12 * M from the beginning of the section). The table is
9696 a two-dimensional array of 32-bit words (using the byte order of the
9697 application binary), with L columns and N+1 rows, in row-major order.
9698 Each row in the array is indexed starting from 0. The first row provides
9699 a key to the remaining rows: each column in this row provides an identifier
9700 for a debug section, and the offsets in the same column of subsequent rows
9701 refer to that section. The section identifiers are:
9703 DW_SECT_INFO 1 .debug_info.dwo
9704 DW_SECT_TYPES 2 .debug_types.dwo
9705 DW_SECT_ABBREV 3 .debug_abbrev.dwo
9706 DW_SECT_LINE 4 .debug_line.dwo
9707 DW_SECT_LOC 5 .debug_loc.dwo
9708 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
9709 DW_SECT_MACINFO 7 .debug_macinfo.dwo
9710 DW_SECT_MACRO 8 .debug_macro.dwo
9712 The offsets provided by the CU and TU index sections are the base offsets
9713 for the contributions made by each CU or TU to the corresponding section
9714 in the package file. Each CU and TU header contains an abbrev_offset
9715 field, used to find the abbreviations table for that CU or TU within the
9716 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
9717 be interpreted as relative to the base offset given in the index section.
9718 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
9719 should be interpreted as relative to the base offset for .debug_line.dwo,
9720 and offsets into other debug sections obtained from DWARF attributes should
9721 also be interpreted as relative to the corresponding base offset.
9723 The table of sizes begins immediately following the table of offsets.
9724 Like the table of offsets, it is a two-dimensional array of 32-bit words,
9725 with L columns and N rows, in row-major order. Each row in the array is
9726 indexed starting from 1 (row 0 is shared by the two tables).
9730 Hash table lookup is handled the same in version 1 and 2:
9732 We assume that N and M will not exceed 2^32 - 1.
9733 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
9735 Given a 64-bit compilation unit signature or a type signature S, an entry
9736 in the hash table is located as follows:
9738 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
9739 the low-order k bits all set to 1.
9741 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
9743 3) If the hash table entry at index H matches the signature, use that
9744 entry. If the hash table entry at index H is unused (all zeroes),
9745 terminate the search: the signature is not present in the table.
9747 4) Let H = (H + H') modulo M. Repeat at Step 3.
9749 Because M > N and H' and M are relatively prime, the search is guaranteed
9750 to stop at an unused slot or find the match. */
9752 /* Create a hash table to map DWO IDs to their CU/TU entry in
9753 .debug_{info,types}.dwo in DWP_FILE.
9754 Returns NULL if there isn't one.
9755 Note: This function processes DWP files only, not DWO files. */
9757 static struct dwp_hash_table
*
9758 create_dwp_hash_table (struct dwp_file
*dwp_file
, int is_debug_types
)
9760 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9761 bfd
*dbfd
= dwp_file
->dbfd
;
9762 const gdb_byte
*index_ptr
, *index_end
;
9763 struct dwarf2_section_info
*index
;
9764 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
9765 struct dwp_hash_table
*htab
;
9768 index
= &dwp_file
->sections
.tu_index
;
9770 index
= &dwp_file
->sections
.cu_index
;
9772 if (dwarf2_section_empty_p (index
))
9774 dwarf2_read_section (objfile
, index
);
9776 index_ptr
= index
->buffer
;
9777 index_end
= index_ptr
+ index
->size
;
9779 version
= read_4_bytes (dbfd
, index_ptr
);
9782 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
9786 nr_units
= read_4_bytes (dbfd
, index_ptr
);
9788 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
9791 if (version
!= 1 && version
!= 2)
9793 error (_("Dwarf Error: unsupported DWP file version (%s)"
9795 pulongest (version
), dwp_file
->name
);
9797 if (nr_slots
!= (nr_slots
& -nr_slots
))
9799 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
9800 " is not power of 2 [in module %s]"),
9801 pulongest (nr_slots
), dwp_file
->name
);
9804 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
9805 htab
->version
= version
;
9806 htab
->nr_columns
= nr_columns
;
9807 htab
->nr_units
= nr_units
;
9808 htab
->nr_slots
= nr_slots
;
9809 htab
->hash_table
= index_ptr
;
9810 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
9812 /* Exit early if the table is empty. */
9813 if (nr_slots
== 0 || nr_units
== 0
9814 || (version
== 2 && nr_columns
== 0))
9816 /* All must be zero. */
9817 if (nr_slots
!= 0 || nr_units
!= 0
9818 || (version
== 2 && nr_columns
!= 0))
9820 complaint (&symfile_complaints
,
9821 _("Empty DWP but nr_slots,nr_units,nr_columns not"
9822 " all zero [in modules %s]"),
9830 htab
->section_pool
.v1
.indices
=
9831 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
9832 /* It's harder to decide whether the section is too small in v1.
9833 V1 is deprecated anyway so we punt. */
9837 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
9838 int *ids
= htab
->section_pool
.v2
.section_ids
;
9839 /* Reverse map for error checking. */
9840 int ids_seen
[DW_SECT_MAX
+ 1];
9845 error (_("Dwarf Error: bad DWP hash table, too few columns"
9846 " in section table [in module %s]"),
9849 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
9851 error (_("Dwarf Error: bad DWP hash table, too many columns"
9852 " in section table [in module %s]"),
9855 memset (ids
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
9856 memset (ids_seen
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
9857 for (i
= 0; i
< nr_columns
; ++i
)
9859 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
9861 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
9863 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
9864 " in section table [in module %s]"),
9865 id
, dwp_file
->name
);
9867 if (ids_seen
[id
] != -1)
9869 error (_("Dwarf Error: bad DWP hash table, duplicate section"
9870 " id %d in section table [in module %s]"),
9871 id
, dwp_file
->name
);
9876 /* Must have exactly one info or types section. */
9877 if (((ids_seen
[DW_SECT_INFO
] != -1)
9878 + (ids_seen
[DW_SECT_TYPES
] != -1))
9881 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
9882 " DWO info/types section [in module %s]"),
9885 /* Must have an abbrev section. */
9886 if (ids_seen
[DW_SECT_ABBREV
] == -1)
9888 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
9889 " section [in module %s]"),
9892 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
9893 htab
->section_pool
.v2
.sizes
=
9894 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
9895 * nr_units
* nr_columns
);
9896 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
9897 * nr_units
* nr_columns
))
9900 error (_("Dwarf Error: DWP index section is corrupt (too small)"
9909 /* Update SECTIONS with the data from SECTP.
9911 This function is like the other "locate" section routines that are
9912 passed to bfd_map_over_sections, but in this context the sections to
9913 read comes from the DWP V1 hash table, not the full ELF section table.
9915 The result is non-zero for success, or zero if an error was found. */
9918 locate_v1_virtual_dwo_sections (asection
*sectp
,
9919 struct virtual_v1_dwo_sections
*sections
)
9921 const struct dwop_section_names
*names
= &dwop_section_names
;
9923 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
9925 /* There can be only one. */
9926 if (sections
->abbrev
.s
.section
!= NULL
)
9928 sections
->abbrev
.s
.section
= sectp
;
9929 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
9931 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
9932 || section_is_p (sectp
->name
, &names
->types_dwo
))
9934 /* There can be only one. */
9935 if (sections
->info_or_types
.s
.section
!= NULL
)
9937 sections
->info_or_types
.s
.section
= sectp
;
9938 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
9940 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
9942 /* There can be only one. */
9943 if (sections
->line
.s
.section
!= NULL
)
9945 sections
->line
.s
.section
= sectp
;
9946 sections
->line
.size
= bfd_get_section_size (sectp
);
9948 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
9950 /* There can be only one. */
9951 if (sections
->loc
.s
.section
!= NULL
)
9953 sections
->loc
.s
.section
= sectp
;
9954 sections
->loc
.size
= bfd_get_section_size (sectp
);
9956 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
9958 /* There can be only one. */
9959 if (sections
->macinfo
.s
.section
!= NULL
)
9961 sections
->macinfo
.s
.section
= sectp
;
9962 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
9964 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
9966 /* There can be only one. */
9967 if (sections
->macro
.s
.section
!= NULL
)
9969 sections
->macro
.s
.section
= sectp
;
9970 sections
->macro
.size
= bfd_get_section_size (sectp
);
9972 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
9974 /* There can be only one. */
9975 if (sections
->str_offsets
.s
.section
!= NULL
)
9977 sections
->str_offsets
.s
.section
= sectp
;
9978 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
9982 /* No other kind of section is valid. */
9989 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
9990 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
9991 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
9992 This is for DWP version 1 files. */
9994 static struct dwo_unit
*
9995 create_dwo_unit_in_dwp_v1 (struct dwp_file
*dwp_file
,
9996 uint32_t unit_index
,
9997 const char *comp_dir
,
9998 ULONGEST signature
, int is_debug_types
)
10000 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10001 const struct dwp_hash_table
*dwp_htab
=
10002 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10003 bfd
*dbfd
= dwp_file
->dbfd
;
10004 const char *kind
= is_debug_types
? "TU" : "CU";
10005 struct dwo_file
*dwo_file
;
10006 struct dwo_unit
*dwo_unit
;
10007 struct virtual_v1_dwo_sections sections
;
10008 void **dwo_file_slot
;
10009 char *virtual_dwo_name
;
10010 struct cleanup
*cleanups
;
10013 gdb_assert (dwp_file
->version
== 1);
10015 if (dwarf_read_debug
)
10017 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
10019 pulongest (unit_index
), hex_string (signature
),
10023 /* Fetch the sections of this DWO unit.
10024 Put a limit on the number of sections we look for so that bad data
10025 doesn't cause us to loop forever. */
10027 #define MAX_NR_V1_DWO_SECTIONS \
10028 (1 /* .debug_info or .debug_types */ \
10029 + 1 /* .debug_abbrev */ \
10030 + 1 /* .debug_line */ \
10031 + 1 /* .debug_loc */ \
10032 + 1 /* .debug_str_offsets */ \
10033 + 1 /* .debug_macro or .debug_macinfo */ \
10034 + 1 /* trailing zero */)
10036 memset (§ions
, 0, sizeof (sections
));
10037 cleanups
= make_cleanup (null_cleanup
, 0);
10039 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
10042 uint32_t section_nr
=
10043 read_4_bytes (dbfd
,
10044 dwp_htab
->section_pool
.v1
.indices
10045 + (unit_index
+ i
) * sizeof (uint32_t));
10047 if (section_nr
== 0)
10049 if (section_nr
>= dwp_file
->num_sections
)
10051 error (_("Dwarf Error: bad DWP hash table, section number too large"
10052 " [in module %s]"),
10056 sectp
= dwp_file
->elf_sections
[section_nr
];
10057 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
10059 error (_("Dwarf Error: bad DWP hash table, invalid section found"
10060 " [in module %s]"),
10066 || dwarf2_section_empty_p (§ions
.info_or_types
)
10067 || dwarf2_section_empty_p (§ions
.abbrev
))
10069 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
10070 " [in module %s]"),
10073 if (i
== MAX_NR_V1_DWO_SECTIONS
)
10075 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
10076 " [in module %s]"),
10080 /* It's easier for the rest of the code if we fake a struct dwo_file and
10081 have dwo_unit "live" in that. At least for now.
10083 The DWP file can be made up of a random collection of CUs and TUs.
10084 However, for each CU + set of TUs that came from the same original DWO
10085 file, we can combine them back into a virtual DWO file to save space
10086 (fewer struct dwo_file objects to allocate). Remember that for really
10087 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10090 xstrprintf ("virtual-dwo/%d-%d-%d-%d",
10091 get_section_id (§ions
.abbrev
),
10092 get_section_id (§ions
.line
),
10093 get_section_id (§ions
.loc
),
10094 get_section_id (§ions
.str_offsets
));
10095 make_cleanup (xfree
, virtual_dwo_name
);
10096 /* Can we use an existing virtual DWO file? */
10097 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
10098 /* Create one if necessary. */
10099 if (*dwo_file_slot
== NULL
)
10101 if (dwarf_read_debug
)
10103 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
10106 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10108 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
10110 strlen (virtual_dwo_name
));
10111 dwo_file
->comp_dir
= comp_dir
;
10112 dwo_file
->sections
.abbrev
= sections
.abbrev
;
10113 dwo_file
->sections
.line
= sections
.line
;
10114 dwo_file
->sections
.loc
= sections
.loc
;
10115 dwo_file
->sections
.macinfo
= sections
.macinfo
;
10116 dwo_file
->sections
.macro
= sections
.macro
;
10117 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
10118 /* The "str" section is global to the entire DWP file. */
10119 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10120 /* The info or types section is assigned below to dwo_unit,
10121 there's no need to record it in dwo_file.
10122 Also, we can't simply record type sections in dwo_file because
10123 we record a pointer into the vector in dwo_unit. As we collect more
10124 types we'll grow the vector and eventually have to reallocate space
10125 for it, invalidating all copies of pointers into the previous
10127 *dwo_file_slot
= dwo_file
;
10131 if (dwarf_read_debug
)
10133 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10136 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
10138 do_cleanups (cleanups
);
10140 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10141 dwo_unit
->dwo_file
= dwo_file
;
10142 dwo_unit
->signature
= signature
;
10143 dwo_unit
->section
=
10144 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
10145 *dwo_unit
->section
= sections
.info_or_types
;
10146 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10151 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
10152 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
10153 piece within that section used by a TU/CU, return a virtual section
10154 of just that piece. */
10156 static struct dwarf2_section_info
10157 create_dwp_v2_section (struct dwarf2_section_info
*section
,
10158 bfd_size_type offset
, bfd_size_type size
)
10160 struct dwarf2_section_info result
;
10163 gdb_assert (section
!= NULL
);
10164 gdb_assert (!section
->is_virtual
);
10166 memset (&result
, 0, sizeof (result
));
10167 result
.s
.containing_section
= section
;
10168 result
.is_virtual
= 1;
10173 sectp
= get_section_bfd_section (section
);
10175 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
10176 bounds of the real section. This is a pretty-rare event, so just
10177 flag an error (easier) instead of a warning and trying to cope. */
10179 || offset
+ size
> bfd_get_section_size (sectp
))
10181 bfd
*abfd
= sectp
->owner
;
10183 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
10184 " in section %s [in module %s]"),
10185 sectp
? bfd_section_name (abfd
, sectp
) : "<unknown>",
10186 objfile_name (dwarf2_per_objfile
->objfile
));
10189 result
.virtual_offset
= offset
;
10190 result
.size
= size
;
10194 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
10195 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
10196 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
10197 This is for DWP version 2 files. */
10199 static struct dwo_unit
*
10200 create_dwo_unit_in_dwp_v2 (struct dwp_file
*dwp_file
,
10201 uint32_t unit_index
,
10202 const char *comp_dir
,
10203 ULONGEST signature
, int is_debug_types
)
10205 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10206 const struct dwp_hash_table
*dwp_htab
=
10207 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10208 bfd
*dbfd
= dwp_file
->dbfd
;
10209 const char *kind
= is_debug_types
? "TU" : "CU";
10210 struct dwo_file
*dwo_file
;
10211 struct dwo_unit
*dwo_unit
;
10212 struct virtual_v2_dwo_sections sections
;
10213 void **dwo_file_slot
;
10214 char *virtual_dwo_name
;
10215 struct cleanup
*cleanups
;
10218 gdb_assert (dwp_file
->version
== 2);
10220 if (dwarf_read_debug
)
10222 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
10224 pulongest (unit_index
), hex_string (signature
),
10228 /* Fetch the section offsets of this DWO unit. */
10230 memset (§ions
, 0, sizeof (sections
));
10231 cleanups
= make_cleanup (null_cleanup
, 0);
10233 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
10235 uint32_t offset
= read_4_bytes (dbfd
,
10236 dwp_htab
->section_pool
.v2
.offsets
10237 + (((unit_index
- 1) * dwp_htab
->nr_columns
10239 * sizeof (uint32_t)));
10240 uint32_t size
= read_4_bytes (dbfd
,
10241 dwp_htab
->section_pool
.v2
.sizes
10242 + (((unit_index
- 1) * dwp_htab
->nr_columns
10244 * sizeof (uint32_t)));
10246 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
10249 case DW_SECT_TYPES
:
10250 sections
.info_or_types_offset
= offset
;
10251 sections
.info_or_types_size
= size
;
10253 case DW_SECT_ABBREV
:
10254 sections
.abbrev_offset
= offset
;
10255 sections
.abbrev_size
= size
;
10258 sections
.line_offset
= offset
;
10259 sections
.line_size
= size
;
10262 sections
.loc_offset
= offset
;
10263 sections
.loc_size
= size
;
10265 case DW_SECT_STR_OFFSETS
:
10266 sections
.str_offsets_offset
= offset
;
10267 sections
.str_offsets_size
= size
;
10269 case DW_SECT_MACINFO
:
10270 sections
.macinfo_offset
= offset
;
10271 sections
.macinfo_size
= size
;
10273 case DW_SECT_MACRO
:
10274 sections
.macro_offset
= offset
;
10275 sections
.macro_size
= size
;
10280 /* It's easier for the rest of the code if we fake a struct dwo_file and
10281 have dwo_unit "live" in that. At least for now.
10283 The DWP file can be made up of a random collection of CUs and TUs.
10284 However, for each CU + set of TUs that came from the same original DWO
10285 file, we can combine them back into a virtual DWO file to save space
10286 (fewer struct dwo_file objects to allocate). Remember that for really
10287 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10290 xstrprintf ("virtual-dwo/%ld-%ld-%ld-%ld",
10291 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
10292 (long) (sections
.line_size
? sections
.line_offset
: 0),
10293 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
10294 (long) (sections
.str_offsets_size
10295 ? sections
.str_offsets_offset
: 0));
10296 make_cleanup (xfree
, virtual_dwo_name
);
10297 /* Can we use an existing virtual DWO file? */
10298 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
10299 /* Create one if necessary. */
10300 if (*dwo_file_slot
== NULL
)
10302 if (dwarf_read_debug
)
10304 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
10307 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10309 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
10311 strlen (virtual_dwo_name
));
10312 dwo_file
->comp_dir
= comp_dir
;
10313 dwo_file
->sections
.abbrev
=
10314 create_dwp_v2_section (&dwp_file
->sections
.abbrev
,
10315 sections
.abbrev_offset
, sections
.abbrev_size
);
10316 dwo_file
->sections
.line
=
10317 create_dwp_v2_section (&dwp_file
->sections
.line
,
10318 sections
.line_offset
, sections
.line_size
);
10319 dwo_file
->sections
.loc
=
10320 create_dwp_v2_section (&dwp_file
->sections
.loc
,
10321 sections
.loc_offset
, sections
.loc_size
);
10322 dwo_file
->sections
.macinfo
=
10323 create_dwp_v2_section (&dwp_file
->sections
.macinfo
,
10324 sections
.macinfo_offset
, sections
.macinfo_size
);
10325 dwo_file
->sections
.macro
=
10326 create_dwp_v2_section (&dwp_file
->sections
.macro
,
10327 sections
.macro_offset
, sections
.macro_size
);
10328 dwo_file
->sections
.str_offsets
=
10329 create_dwp_v2_section (&dwp_file
->sections
.str_offsets
,
10330 sections
.str_offsets_offset
,
10331 sections
.str_offsets_size
);
10332 /* The "str" section is global to the entire DWP file. */
10333 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10334 /* The info or types section is assigned below to dwo_unit,
10335 there's no need to record it in dwo_file.
10336 Also, we can't simply record type sections in dwo_file because
10337 we record a pointer into the vector in dwo_unit. As we collect more
10338 types we'll grow the vector and eventually have to reallocate space
10339 for it, invalidating all copies of pointers into the previous
10341 *dwo_file_slot
= dwo_file
;
10345 if (dwarf_read_debug
)
10347 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10350 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
10352 do_cleanups (cleanups
);
10354 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10355 dwo_unit
->dwo_file
= dwo_file
;
10356 dwo_unit
->signature
= signature
;
10357 dwo_unit
->section
=
10358 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
10359 *dwo_unit
->section
= create_dwp_v2_section (is_debug_types
10360 ? &dwp_file
->sections
.types
10361 : &dwp_file
->sections
.info
,
10362 sections
.info_or_types_offset
,
10363 sections
.info_or_types_size
);
10364 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10369 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
10370 Returns NULL if the signature isn't found. */
10372 static struct dwo_unit
*
10373 lookup_dwo_unit_in_dwp (struct dwp_file
*dwp_file
, const char *comp_dir
,
10374 ULONGEST signature
, int is_debug_types
)
10376 const struct dwp_hash_table
*dwp_htab
=
10377 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10378 bfd
*dbfd
= dwp_file
->dbfd
;
10379 uint32_t mask
= dwp_htab
->nr_slots
- 1;
10380 uint32_t hash
= signature
& mask
;
10381 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
10384 struct dwo_unit find_dwo_cu
;
10386 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
10387 find_dwo_cu
.signature
= signature
;
10388 slot
= htab_find_slot (is_debug_types
10389 ? dwp_file
->loaded_tus
10390 : dwp_file
->loaded_cus
,
10391 &find_dwo_cu
, INSERT
);
10394 return (struct dwo_unit
*) *slot
;
10396 /* Use a for loop so that we don't loop forever on bad debug info. */
10397 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
10399 ULONGEST signature_in_table
;
10401 signature_in_table
=
10402 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
10403 if (signature_in_table
== signature
)
10405 uint32_t unit_index
=
10406 read_4_bytes (dbfd
,
10407 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
10409 if (dwp_file
->version
== 1)
10411 *slot
= create_dwo_unit_in_dwp_v1 (dwp_file
, unit_index
,
10412 comp_dir
, signature
,
10417 *slot
= create_dwo_unit_in_dwp_v2 (dwp_file
, unit_index
,
10418 comp_dir
, signature
,
10421 return (struct dwo_unit
*) *slot
;
10423 if (signature_in_table
== 0)
10425 hash
= (hash
+ hash2
) & mask
;
10428 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
10429 " [in module %s]"),
10433 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
10434 Open the file specified by FILE_NAME and hand it off to BFD for
10435 preliminary analysis. Return a newly initialized bfd *, which
10436 includes a canonicalized copy of FILE_NAME.
10437 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
10438 SEARCH_CWD is true if the current directory is to be searched.
10439 It will be searched before debug-file-directory.
10440 If successful, the file is added to the bfd include table of the
10441 objfile's bfd (see gdb_bfd_record_inclusion).
10442 If unable to find/open the file, return NULL.
10443 NOTE: This function is derived from symfile_bfd_open. */
10445 static gdb_bfd_ref_ptr
10446 try_open_dwop_file (const char *file_name
, int is_dwp
, int search_cwd
)
10449 char *absolute_name
;
10450 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
10451 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
10452 to debug_file_directory. */
10454 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
10458 if (*debug_file_directory
!= '\0')
10459 search_path
= concat (".", dirname_separator_string
,
10460 debug_file_directory
, (char *) NULL
);
10462 search_path
= xstrdup (".");
10465 search_path
= xstrdup (debug_file_directory
);
10467 flags
= OPF_RETURN_REALPATH
;
10469 flags
|= OPF_SEARCH_IN_PATH
;
10470 desc
= openp (search_path
, flags
, file_name
,
10471 O_RDONLY
| O_BINARY
, &absolute_name
);
10472 xfree (search_path
);
10476 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (absolute_name
, gnutarget
, desc
));
10477 xfree (absolute_name
);
10478 if (sym_bfd
== NULL
)
10480 bfd_set_cacheable (sym_bfd
.get (), 1);
10482 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
10485 /* Success. Record the bfd as having been included by the objfile's bfd.
10486 This is important because things like demangled_names_hash lives in the
10487 objfile's per_bfd space and may have references to things like symbol
10488 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
10489 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
.get ());
10494 /* Try to open DWO file FILE_NAME.
10495 COMP_DIR is the DW_AT_comp_dir attribute.
10496 The result is the bfd handle of the file.
10497 If there is a problem finding or opening the file, return NULL.
10498 Upon success, the canonicalized path of the file is stored in the bfd,
10499 same as symfile_bfd_open. */
10501 static gdb_bfd_ref_ptr
10502 open_dwo_file (const char *file_name
, const char *comp_dir
)
10504 if (IS_ABSOLUTE_PATH (file_name
))
10505 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 0 /*search_cwd*/);
10507 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
10509 if (comp_dir
!= NULL
)
10511 char *path_to_try
= concat (comp_dir
, SLASH_STRING
,
10512 file_name
, (char *) NULL
);
10514 /* NOTE: If comp_dir is a relative path, this will also try the
10515 search path, which seems useful. */
10516 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (path_to_try
, 0 /*is_dwp*/,
10517 1 /*search_cwd*/));
10518 xfree (path_to_try
);
10523 /* That didn't work, try debug-file-directory, which, despite its name,
10524 is a list of paths. */
10526 if (*debug_file_directory
== '\0')
10529 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 1 /*search_cwd*/);
10532 /* This function is mapped across the sections and remembers the offset and
10533 size of each of the DWO debugging sections we are interested in. */
10536 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
10538 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
10539 const struct dwop_section_names
*names
= &dwop_section_names
;
10541 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10543 dwo_sections
->abbrev
.s
.section
= sectp
;
10544 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
10546 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
10548 dwo_sections
->info
.s
.section
= sectp
;
10549 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
10551 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10553 dwo_sections
->line
.s
.section
= sectp
;
10554 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
10556 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10558 dwo_sections
->loc
.s
.section
= sectp
;
10559 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
10561 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10563 dwo_sections
->macinfo
.s
.section
= sectp
;
10564 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
10566 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10568 dwo_sections
->macro
.s
.section
= sectp
;
10569 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
10571 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
10573 dwo_sections
->str
.s
.section
= sectp
;
10574 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
10576 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10578 dwo_sections
->str_offsets
.s
.section
= sectp
;
10579 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
10581 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
10583 struct dwarf2_section_info type_section
;
10585 memset (&type_section
, 0, sizeof (type_section
));
10586 type_section
.s
.section
= sectp
;
10587 type_section
.size
= bfd_get_section_size (sectp
);
10588 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
10593 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
10594 by PER_CU. This is for the non-DWP case.
10595 The result is NULL if DWO_NAME can't be found. */
10597 static struct dwo_file
*
10598 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
10599 const char *dwo_name
, const char *comp_dir
)
10601 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10602 struct dwo_file
*dwo_file
;
10603 struct cleanup
*cleanups
;
10605 gdb_bfd_ref_ptr
dbfd (open_dwo_file (dwo_name
, comp_dir
));
10608 if (dwarf_read_debug
)
10609 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
10612 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10613 dwo_file
->dwo_name
= dwo_name
;
10614 dwo_file
->comp_dir
= comp_dir
;
10615 dwo_file
->dbfd
= dbfd
.release ();
10617 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwo_file
);
10619 bfd_map_over_sections (dwo_file
->dbfd
, dwarf2_locate_dwo_sections
,
10620 &dwo_file
->sections
);
10622 dwo_file
->cu
= create_dwo_cu (dwo_file
);
10624 create_debug_types_hash_table (dwo_file
, dwo_file
->sections
.types
,
10627 discard_cleanups (cleanups
);
10629 if (dwarf_read_debug
)
10630 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
10635 /* This function is mapped across the sections and remembers the offset and
10636 size of each of the DWP debugging sections common to version 1 and 2 that
10637 we are interested in. */
10640 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
10641 void *dwp_file_ptr
)
10643 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
10644 const struct dwop_section_names
*names
= &dwop_section_names
;
10645 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
10647 /* Record the ELF section number for later lookup: this is what the
10648 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10649 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
10650 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
10652 /* Look for specific sections that we need. */
10653 if (section_is_p (sectp
->name
, &names
->str_dwo
))
10655 dwp_file
->sections
.str
.s
.section
= sectp
;
10656 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
10658 else if (section_is_p (sectp
->name
, &names
->cu_index
))
10660 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
10661 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
10663 else if (section_is_p (sectp
->name
, &names
->tu_index
))
10665 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
10666 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
10670 /* This function is mapped across the sections and remembers the offset and
10671 size of each of the DWP version 2 debugging sections that we are interested
10672 in. This is split into a separate function because we don't know if we
10673 have version 1 or 2 until we parse the cu_index/tu_index sections. */
10676 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
10678 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
10679 const struct dwop_section_names
*names
= &dwop_section_names
;
10680 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
10682 /* Record the ELF section number for later lookup: this is what the
10683 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10684 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
10685 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
10687 /* Look for specific sections that we need. */
10688 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10690 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
10691 dwp_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
10693 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
10695 dwp_file
->sections
.info
.s
.section
= sectp
;
10696 dwp_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
10698 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10700 dwp_file
->sections
.line
.s
.section
= sectp
;
10701 dwp_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
10703 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10705 dwp_file
->sections
.loc
.s
.section
= sectp
;
10706 dwp_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
10708 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10710 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
10711 dwp_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
10713 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10715 dwp_file
->sections
.macro
.s
.section
= sectp
;
10716 dwp_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
10718 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10720 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
10721 dwp_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
10723 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
10725 dwp_file
->sections
.types
.s
.section
= sectp
;
10726 dwp_file
->sections
.types
.size
= bfd_get_section_size (sectp
);
10730 /* Hash function for dwp_file loaded CUs/TUs. */
10733 hash_dwp_loaded_cutus (const void *item
)
10735 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
10737 /* This drops the top 32 bits of the signature, but is ok for a hash. */
10738 return dwo_unit
->signature
;
10741 /* Equality function for dwp_file loaded CUs/TUs. */
10744 eq_dwp_loaded_cutus (const void *a
, const void *b
)
10746 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
10747 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
10749 return dua
->signature
== dub
->signature
;
10752 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
10755 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
10757 return htab_create_alloc_ex (3,
10758 hash_dwp_loaded_cutus
,
10759 eq_dwp_loaded_cutus
,
10761 &objfile
->objfile_obstack
,
10762 hashtab_obstack_allocate
,
10763 dummy_obstack_deallocate
);
10766 /* Try to open DWP file FILE_NAME.
10767 The result is the bfd handle of the file.
10768 If there is a problem finding or opening the file, return NULL.
10769 Upon success, the canonicalized path of the file is stored in the bfd,
10770 same as symfile_bfd_open. */
10772 static gdb_bfd_ref_ptr
10773 open_dwp_file (const char *file_name
)
10775 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (file_name
, 1 /*is_dwp*/,
10776 1 /*search_cwd*/));
10780 /* Work around upstream bug 15652.
10781 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
10782 [Whether that's a "bug" is debatable, but it is getting in our way.]
10783 We have no real idea where the dwp file is, because gdb's realpath-ing
10784 of the executable's path may have discarded the needed info.
10785 [IWBN if the dwp file name was recorded in the executable, akin to
10786 .gnu_debuglink, but that doesn't exist yet.]
10787 Strip the directory from FILE_NAME and search again. */
10788 if (*debug_file_directory
!= '\0')
10790 /* Don't implicitly search the current directory here.
10791 If the user wants to search "." to handle this case,
10792 it must be added to debug-file-directory. */
10793 return try_open_dwop_file (lbasename (file_name
), 1 /*is_dwp*/,
10800 /* Initialize the use of the DWP file for the current objfile.
10801 By convention the name of the DWP file is ${objfile}.dwp.
10802 The result is NULL if it can't be found. */
10804 static struct dwp_file
*
10805 open_and_init_dwp_file (void)
10807 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10808 struct dwp_file
*dwp_file
;
10810 struct cleanup
*cleanups
= make_cleanup (null_cleanup
, 0);
10812 /* Try to find first .dwp for the binary file before any symbolic links
10815 /* If the objfile is a debug file, find the name of the real binary
10816 file and get the name of dwp file from there. */
10817 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
10819 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
10820 const char *backlink_basename
= lbasename (backlink
->original_name
);
10821 char *debug_dirname
= ldirname (objfile
->original_name
);
10823 make_cleanup (xfree
, debug_dirname
);
10824 dwp_name
= xstrprintf ("%s%s%s.dwp", debug_dirname
,
10825 SLASH_STRING
, backlink_basename
);
10828 dwp_name
= xstrprintf ("%s.dwp", objfile
->original_name
);
10829 make_cleanup (xfree
, dwp_name
);
10831 gdb_bfd_ref_ptr
dbfd (open_dwp_file (dwp_name
));
10833 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
10835 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
10836 dwp_name
= xstrprintf ("%s.dwp", objfile_name (objfile
));
10837 make_cleanup (xfree
, dwp_name
);
10838 dbfd
= open_dwp_file (dwp_name
);
10843 if (dwarf_read_debug
)
10844 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
);
10845 do_cleanups (cleanups
);
10848 dwp_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_file
);
10849 dwp_file
->name
= bfd_get_filename (dbfd
.get ());
10850 dwp_file
->dbfd
= dbfd
.release ();
10851 do_cleanups (cleanups
);
10853 /* +1: section 0 is unused */
10854 dwp_file
->num_sections
= bfd_count_sections (dwp_file
->dbfd
) + 1;
10855 dwp_file
->elf_sections
=
10856 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
10857 dwp_file
->num_sections
, asection
*);
10859 bfd_map_over_sections (dwp_file
->dbfd
, dwarf2_locate_common_dwp_sections
,
10862 dwp_file
->cus
= create_dwp_hash_table (dwp_file
, 0);
10864 dwp_file
->tus
= create_dwp_hash_table (dwp_file
, 1);
10866 /* The DWP file version is stored in the hash table. Oh well. */
10867 if (dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
10869 /* Technically speaking, we should try to limp along, but this is
10870 pretty bizarre. We use pulongest here because that's the established
10871 portability solution (e.g, we cannot use %u for uint32_t). */
10872 error (_("Dwarf Error: DWP file CU version %s doesn't match"
10873 " TU version %s [in DWP file %s]"),
10874 pulongest (dwp_file
->cus
->version
),
10875 pulongest (dwp_file
->tus
->version
), dwp_name
);
10877 dwp_file
->version
= dwp_file
->cus
->version
;
10879 if (dwp_file
->version
== 2)
10880 bfd_map_over_sections (dwp_file
->dbfd
, dwarf2_locate_v2_dwp_sections
,
10883 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
10884 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
10886 if (dwarf_read_debug
)
10888 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
10889 fprintf_unfiltered (gdb_stdlog
,
10890 " %s CUs, %s TUs\n",
10891 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
10892 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
10898 /* Wrapper around open_and_init_dwp_file, only open it once. */
10900 static struct dwp_file
*
10901 get_dwp_file (void)
10903 if (! dwarf2_per_objfile
->dwp_checked
)
10905 dwarf2_per_objfile
->dwp_file
= open_and_init_dwp_file ();
10906 dwarf2_per_objfile
->dwp_checked
= 1;
10908 return dwarf2_per_objfile
->dwp_file
;
10911 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
10912 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
10913 or in the DWP file for the objfile, referenced by THIS_UNIT.
10914 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
10915 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
10917 This is called, for example, when wanting to read a variable with a
10918 complex location. Therefore we don't want to do file i/o for every call.
10919 Therefore we don't want to look for a DWO file on every call.
10920 Therefore we first see if we've already seen SIGNATURE in a DWP file,
10921 then we check if we've already seen DWO_NAME, and only THEN do we check
10924 The result is a pointer to the dwo_unit object or NULL if we didn't find it
10925 (dwo_id mismatch or couldn't find the DWO/DWP file). */
10927 static struct dwo_unit
*
10928 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
10929 const char *dwo_name
, const char *comp_dir
,
10930 ULONGEST signature
, int is_debug_types
)
10932 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10933 const char *kind
= is_debug_types
? "TU" : "CU";
10934 void **dwo_file_slot
;
10935 struct dwo_file
*dwo_file
;
10936 struct dwp_file
*dwp_file
;
10938 /* First see if there's a DWP file.
10939 If we have a DWP file but didn't find the DWO inside it, don't
10940 look for the original DWO file. It makes gdb behave differently
10941 depending on whether one is debugging in the build tree. */
10943 dwp_file
= get_dwp_file ();
10944 if (dwp_file
!= NULL
)
10946 const struct dwp_hash_table
*dwp_htab
=
10947 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10949 if (dwp_htab
!= NULL
)
10951 struct dwo_unit
*dwo_cutu
=
10952 lookup_dwo_unit_in_dwp (dwp_file
, comp_dir
,
10953 signature
, is_debug_types
);
10955 if (dwo_cutu
!= NULL
)
10957 if (dwarf_read_debug
)
10959 fprintf_unfiltered (gdb_stdlog
,
10960 "Virtual DWO %s %s found: @%s\n",
10961 kind
, hex_string (signature
),
10962 host_address_to_string (dwo_cutu
));
10970 /* No DWP file, look for the DWO file. */
10972 dwo_file_slot
= lookup_dwo_file_slot (dwo_name
, comp_dir
);
10973 if (*dwo_file_slot
== NULL
)
10975 /* Read in the file and build a table of the CUs/TUs it contains. */
10976 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
10978 /* NOTE: This will be NULL if unable to open the file. */
10979 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
10981 if (dwo_file
!= NULL
)
10983 struct dwo_unit
*dwo_cutu
= NULL
;
10985 if (is_debug_types
&& dwo_file
->tus
)
10987 struct dwo_unit find_dwo_cutu
;
10989 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
10990 find_dwo_cutu
.signature
= signature
;
10992 = (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_cutu
);
10994 else if (!is_debug_types
&& dwo_file
->cu
)
10996 if (signature
== dwo_file
->cu
->signature
)
10997 dwo_cutu
= dwo_file
->cu
;
11000 if (dwo_cutu
!= NULL
)
11002 if (dwarf_read_debug
)
11004 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
11005 kind
, dwo_name
, hex_string (signature
),
11006 host_address_to_string (dwo_cutu
));
11013 /* We didn't find it. This could mean a dwo_id mismatch, or
11014 someone deleted the DWO/DWP file, or the search path isn't set up
11015 correctly to find the file. */
11017 if (dwarf_read_debug
)
11019 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
11020 kind
, dwo_name
, hex_string (signature
));
11023 /* This is a warning and not a complaint because it can be caused by
11024 pilot error (e.g., user accidentally deleting the DWO). */
11026 /* Print the name of the DWP file if we looked there, helps the user
11027 better diagnose the problem. */
11028 char *dwp_text
= NULL
;
11029 struct cleanup
*cleanups
;
11031 if (dwp_file
!= NULL
)
11032 dwp_text
= xstrprintf (" [in DWP file %s]", lbasename (dwp_file
->name
));
11033 cleanups
= make_cleanup (xfree
, dwp_text
);
11035 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x"
11036 " [in module %s]"),
11037 kind
, dwo_name
, hex_string (signature
),
11038 dwp_text
!= NULL
? dwp_text
: "",
11039 this_unit
->is_debug_types
? "TU" : "CU",
11040 this_unit
->offset
.sect_off
, objfile_name (objfile
));
11042 do_cleanups (cleanups
);
11047 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
11048 See lookup_dwo_cutu_unit for details. */
11050 static struct dwo_unit
*
11051 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
11052 const char *dwo_name
, const char *comp_dir
,
11053 ULONGEST signature
)
11055 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
11058 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
11059 See lookup_dwo_cutu_unit for details. */
11061 static struct dwo_unit
*
11062 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
11063 const char *dwo_name
, const char *comp_dir
)
11065 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
11068 /* Traversal function for queue_and_load_all_dwo_tus. */
11071 queue_and_load_dwo_tu (void **slot
, void *info
)
11073 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
11074 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
11075 ULONGEST signature
= dwo_unit
->signature
;
11076 struct signatured_type
*sig_type
=
11077 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
11079 if (sig_type
!= NULL
)
11081 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
11083 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
11084 a real dependency of PER_CU on SIG_TYPE. That is detected later
11085 while processing PER_CU. */
11086 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
11087 load_full_type_unit (sig_cu
);
11088 VEC_safe_push (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, sig_cu
);
11094 /* Queue all TUs contained in the DWO of PER_CU to be read in.
11095 The DWO may have the only definition of the type, though it may not be
11096 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
11097 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
11100 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
11102 struct dwo_unit
*dwo_unit
;
11103 struct dwo_file
*dwo_file
;
11105 gdb_assert (!per_cu
->is_debug_types
);
11106 gdb_assert (get_dwp_file () == NULL
);
11107 gdb_assert (per_cu
->cu
!= NULL
);
11109 dwo_unit
= per_cu
->cu
->dwo_unit
;
11110 gdb_assert (dwo_unit
!= NULL
);
11112 dwo_file
= dwo_unit
->dwo_file
;
11113 if (dwo_file
->tus
!= NULL
)
11114 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
11117 /* Free all resources associated with DWO_FILE.
11118 Close the DWO file and munmap the sections.
11119 All memory should be on the objfile obstack. */
11122 free_dwo_file (struct dwo_file
*dwo_file
, struct objfile
*objfile
)
11125 /* Note: dbfd is NULL for virtual DWO files. */
11126 gdb_bfd_unref (dwo_file
->dbfd
);
11128 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
11131 /* Wrapper for free_dwo_file for use in cleanups. */
11134 free_dwo_file_cleanup (void *arg
)
11136 struct dwo_file
*dwo_file
= (struct dwo_file
*) arg
;
11137 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11139 free_dwo_file (dwo_file
, objfile
);
11142 /* Traversal function for free_dwo_files. */
11145 free_dwo_file_from_slot (void **slot
, void *info
)
11147 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
11148 struct objfile
*objfile
= (struct objfile
*) info
;
11150 free_dwo_file (dwo_file
, objfile
);
11155 /* Free all resources associated with DWO_FILES. */
11158 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
11160 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
11163 /* Read in various DIEs. */
11165 /* qsort helper for inherit_abstract_dies. */
11168 unsigned_int_compar (const void *ap
, const void *bp
)
11170 unsigned int a
= *(unsigned int *) ap
;
11171 unsigned int b
= *(unsigned int *) bp
;
11173 return (a
> b
) - (b
> a
);
11176 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
11177 Inherit only the children of the DW_AT_abstract_origin DIE not being
11178 already referenced by DW_AT_abstract_origin from the children of the
11182 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
11184 struct die_info
*child_die
;
11185 unsigned die_children_count
;
11186 /* CU offsets which were referenced by children of the current DIE. */
11187 sect_offset
*offsets
;
11188 sect_offset
*offsets_end
, *offsetp
;
11189 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
11190 struct die_info
*origin_die
;
11191 /* Iterator of the ORIGIN_DIE children. */
11192 struct die_info
*origin_child_die
;
11193 struct cleanup
*cleanups
;
11194 struct attribute
*attr
;
11195 struct dwarf2_cu
*origin_cu
;
11196 struct pending
**origin_previous_list_in_scope
;
11198 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
11202 /* Note that following die references may follow to a die in a
11206 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
11208 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
11210 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
11211 origin_cu
->list_in_scope
= cu
->list_in_scope
;
11213 if (die
->tag
!= origin_die
->tag
11214 && !(die
->tag
== DW_TAG_inlined_subroutine
11215 && origin_die
->tag
== DW_TAG_subprogram
))
11216 complaint (&symfile_complaints
,
11217 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
11218 die
->offset
.sect_off
, origin_die
->offset
.sect_off
);
11220 child_die
= die
->child
;
11221 die_children_count
= 0;
11222 while (child_die
&& child_die
->tag
)
11224 child_die
= sibling_die (child_die
);
11225 die_children_count
++;
11227 offsets
= XNEWVEC (sect_offset
, die_children_count
);
11228 cleanups
= make_cleanup (xfree
, offsets
);
11230 offsets_end
= offsets
;
11231 for (child_die
= die
->child
;
11232 child_die
&& child_die
->tag
;
11233 child_die
= sibling_die (child_die
))
11235 struct die_info
*child_origin_die
;
11236 struct dwarf2_cu
*child_origin_cu
;
11238 /* We are trying to process concrete instance entries:
11239 DW_TAG_GNU_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
11240 it's not relevant to our analysis here. i.e. detecting DIEs that are
11241 present in the abstract instance but not referenced in the concrete
11243 if (child_die
->tag
== DW_TAG_GNU_call_site
)
11246 /* For each CHILD_DIE, find the corresponding child of
11247 ORIGIN_DIE. If there is more than one layer of
11248 DW_AT_abstract_origin, follow them all; there shouldn't be,
11249 but GCC versions at least through 4.4 generate this (GCC PR
11251 child_origin_die
= child_die
;
11252 child_origin_cu
= cu
;
11255 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
11259 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
11263 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
11264 counterpart may exist. */
11265 if (child_origin_die
!= child_die
)
11267 if (child_die
->tag
!= child_origin_die
->tag
11268 && !(child_die
->tag
== DW_TAG_inlined_subroutine
11269 && child_origin_die
->tag
== DW_TAG_subprogram
))
11270 complaint (&symfile_complaints
,
11271 _("Child DIE 0x%x and its abstract origin 0x%x have "
11272 "different tags"), child_die
->offset
.sect_off
,
11273 child_origin_die
->offset
.sect_off
);
11274 if (child_origin_die
->parent
!= origin_die
)
11275 complaint (&symfile_complaints
,
11276 _("Child DIE 0x%x and its abstract origin 0x%x have "
11277 "different parents"), child_die
->offset
.sect_off
,
11278 child_origin_die
->offset
.sect_off
);
11280 *offsets_end
++ = child_origin_die
->offset
;
11283 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
11284 unsigned_int_compar
);
11285 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
11286 if (offsetp
[-1].sect_off
== offsetp
->sect_off
)
11287 complaint (&symfile_complaints
,
11288 _("Multiple children of DIE 0x%x refer "
11289 "to DIE 0x%x as their abstract origin"),
11290 die
->offset
.sect_off
, offsetp
->sect_off
);
11293 origin_child_die
= origin_die
->child
;
11294 while (origin_child_die
&& origin_child_die
->tag
)
11296 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
11297 while (offsetp
< offsets_end
11298 && offsetp
->sect_off
< origin_child_die
->offset
.sect_off
)
11300 if (offsetp
>= offsets_end
11301 || offsetp
->sect_off
> origin_child_die
->offset
.sect_off
)
11303 /* Found that ORIGIN_CHILD_DIE is really not referenced.
11304 Check whether we're already processing ORIGIN_CHILD_DIE.
11305 This can happen with mutually referenced abstract_origins.
11307 if (!origin_child_die
->in_process
)
11308 process_die (origin_child_die
, origin_cu
);
11310 origin_child_die
= sibling_die (origin_child_die
);
11312 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
11314 do_cleanups (cleanups
);
11318 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11320 struct objfile
*objfile
= cu
->objfile
;
11321 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11322 struct context_stack
*newobj
;
11325 struct die_info
*child_die
;
11326 struct attribute
*attr
, *call_line
, *call_file
;
11328 CORE_ADDR baseaddr
;
11329 struct block
*block
;
11330 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
11331 VEC (symbolp
) *template_args
= NULL
;
11332 struct template_symbol
*templ_func
= NULL
;
11336 /* If we do not have call site information, we can't show the
11337 caller of this inlined function. That's too confusing, so
11338 only use the scope for local variables. */
11339 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
11340 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
11341 if (call_line
== NULL
|| call_file
== NULL
)
11343 read_lexical_block_scope (die
, cu
);
11348 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11350 name
= dwarf2_name (die
, cu
);
11352 /* Ignore functions with missing or empty names. These are actually
11353 illegal according to the DWARF standard. */
11356 complaint (&symfile_complaints
,
11357 _("missing name for subprogram DIE at %d"),
11358 die
->offset
.sect_off
);
11362 /* Ignore functions with missing or invalid low and high pc attributes. */
11363 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
11364 <= PC_BOUNDS_INVALID
)
11366 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
11367 if (!attr
|| !DW_UNSND (attr
))
11368 complaint (&symfile_complaints
,
11369 _("cannot get low and high bounds "
11370 "for subprogram DIE at %d"),
11371 die
->offset
.sect_off
);
11375 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11376 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
11378 /* If we have any template arguments, then we must allocate a
11379 different sort of symbol. */
11380 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
11382 if (child_die
->tag
== DW_TAG_template_type_param
11383 || child_die
->tag
== DW_TAG_template_value_param
)
11385 templ_func
= allocate_template_symbol (objfile
);
11386 templ_func
->base
.is_cplus_template_function
= 1;
11391 newobj
= push_context (0, lowpc
);
11392 newobj
->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
11393 (struct symbol
*) templ_func
);
11395 /* If there is a location expression for DW_AT_frame_base, record
11397 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
11399 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
11401 /* If there is a location for the static link, record it. */
11402 newobj
->static_link
= NULL
;
11403 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
11406 newobj
->static_link
11407 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
11408 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
);
11411 cu
->list_in_scope
= &local_symbols
;
11413 if (die
->child
!= NULL
)
11415 child_die
= die
->child
;
11416 while (child_die
&& child_die
->tag
)
11418 if (child_die
->tag
== DW_TAG_template_type_param
11419 || child_die
->tag
== DW_TAG_template_value_param
)
11421 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
11424 VEC_safe_push (symbolp
, template_args
, arg
);
11427 process_die (child_die
, cu
);
11428 child_die
= sibling_die (child_die
);
11432 inherit_abstract_dies (die
, cu
);
11434 /* If we have a DW_AT_specification, we might need to import using
11435 directives from the context of the specification DIE. See the
11436 comment in determine_prefix. */
11437 if (cu
->language
== language_cplus
11438 && dwarf2_attr (die
, DW_AT_specification
, cu
))
11440 struct dwarf2_cu
*spec_cu
= cu
;
11441 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
11445 child_die
= spec_die
->child
;
11446 while (child_die
&& child_die
->tag
)
11448 if (child_die
->tag
== DW_TAG_imported_module
)
11449 process_die (child_die
, spec_cu
);
11450 child_die
= sibling_die (child_die
);
11453 /* In some cases, GCC generates specification DIEs that
11454 themselves contain DW_AT_specification attributes. */
11455 spec_die
= die_specification (spec_die
, &spec_cu
);
11459 newobj
= pop_context ();
11460 /* Make a block for the local symbols within. */
11461 block
= finish_block (newobj
->name
, &local_symbols
, newobj
->old_blocks
,
11462 newobj
->static_link
, lowpc
, highpc
);
11464 /* For C++, set the block's scope. */
11465 if ((cu
->language
== language_cplus
11466 || cu
->language
== language_fortran
11467 || cu
->language
== language_d
11468 || cu
->language
== language_rust
)
11469 && cu
->processing_has_namespace_info
)
11470 block_set_scope (block
, determine_prefix (die
, cu
),
11471 &objfile
->objfile_obstack
);
11473 /* If we have address ranges, record them. */
11474 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11476 gdbarch_make_symbol_special (gdbarch
, newobj
->name
, objfile
);
11478 /* Attach template arguments to function. */
11479 if (! VEC_empty (symbolp
, template_args
))
11481 gdb_assert (templ_func
!= NULL
);
11483 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
11484 templ_func
->template_arguments
11485 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
11486 templ_func
->n_template_arguments
);
11487 memcpy (templ_func
->template_arguments
,
11488 VEC_address (symbolp
, template_args
),
11489 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
11490 VEC_free (symbolp
, template_args
);
11493 /* In C++, we can have functions nested inside functions (e.g., when
11494 a function declares a class that has methods). This means that
11495 when we finish processing a function scope, we may need to go
11496 back to building a containing block's symbol lists. */
11497 local_symbols
= newobj
->locals
;
11498 local_using_directives
= newobj
->local_using_directives
;
11500 /* If we've finished processing a top-level function, subsequent
11501 symbols go in the file symbol list. */
11502 if (outermost_context_p ())
11503 cu
->list_in_scope
= &file_symbols
;
11506 /* Process all the DIES contained within a lexical block scope. Start
11507 a new scope, process the dies, and then close the scope. */
11510 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11512 struct objfile
*objfile
= cu
->objfile
;
11513 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11514 struct context_stack
*newobj
;
11515 CORE_ADDR lowpc
, highpc
;
11516 struct die_info
*child_die
;
11517 CORE_ADDR baseaddr
;
11519 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11521 /* Ignore blocks with missing or invalid low and high pc attributes. */
11522 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
11523 as multiple lexical blocks? Handling children in a sane way would
11524 be nasty. Might be easier to properly extend generic blocks to
11525 describe ranges. */
11526 switch (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
11528 case PC_BOUNDS_NOT_PRESENT
:
11529 /* DW_TAG_lexical_block has no attributes, process its children as if
11530 there was no wrapping by that DW_TAG_lexical_block.
11531 GCC does no longer produces such DWARF since GCC r224161. */
11532 for (child_die
= die
->child
;
11533 child_die
!= NULL
&& child_die
->tag
;
11534 child_die
= sibling_die (child_die
))
11535 process_die (child_die
, cu
);
11537 case PC_BOUNDS_INVALID
:
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 <= PC_BOUNDS_INVALID
)
11750 complaint (&symfile_complaints
,
11751 _("DW_AT_GNU_call_site_target target DIE has invalid "
11752 "low pc, for referencing DIE 0x%x [in module %s]"),
11753 die
->offset
.sect_off
, objfile_name (objfile
));
11756 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11757 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
11762 complaint (&symfile_complaints
,
11763 _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither "
11764 "block nor reference, for DIE 0x%x [in module %s]"),
11765 die
->offset
.sect_off
, objfile_name (objfile
));
11767 call_site
->per_cu
= cu
->per_cu
;
11769 for (child_die
= die
->child
;
11770 child_die
&& child_die
->tag
;
11771 child_die
= sibling_die (child_die
))
11773 struct call_site_parameter
*parameter
;
11774 struct attribute
*loc
, *origin
;
11776 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11778 /* Already printed the complaint above. */
11782 gdb_assert (call_site
->parameter_count
< nparams
);
11783 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
11785 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
11786 specifies DW_TAG_formal_parameter. Value of the data assumed for the
11787 register is contained in DW_AT_GNU_call_site_value. */
11789 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
11790 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
11791 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
11793 sect_offset offset
;
11795 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
11796 offset
= dwarf2_get_ref_die_offset (origin
);
11797 if (!offset_in_cu_p (&cu
->header
, offset
))
11799 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
11800 binding can be done only inside one CU. Such referenced DIE
11801 therefore cannot be even moved to DW_TAG_partial_unit. */
11802 complaint (&symfile_complaints
,
11803 _("DW_AT_abstract_origin offset is not in CU for "
11804 "DW_TAG_GNU_call_site child DIE 0x%x "
11806 child_die
->offset
.sect_off
, objfile_name (objfile
));
11809 parameter
->u
.param_offset
.cu_off
= (offset
.sect_off
11810 - cu
->header
.offset
.sect_off
);
11812 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
11814 complaint (&symfile_complaints
,
11815 _("No DW_FORM_block* DW_AT_location for "
11816 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11817 child_die
->offset
.sect_off
, objfile_name (objfile
));
11822 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
11823 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
11824 if (parameter
->u
.dwarf_reg
!= -1)
11825 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
11826 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
11827 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
11828 ¶meter
->u
.fb_offset
))
11829 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
11832 complaint (&symfile_complaints
,
11833 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
11834 "for DW_FORM_block* DW_AT_location is supported for "
11835 "DW_TAG_GNU_call_site child DIE 0x%x "
11837 child_die
->offset
.sect_off
, objfile_name (objfile
));
11842 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
11843 if (!attr_form_is_block (attr
))
11845 complaint (&symfile_complaints
,
11846 _("No DW_FORM_block* DW_AT_GNU_call_site_value for "
11847 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11848 child_die
->offset
.sect_off
, objfile_name (objfile
));
11851 parameter
->value
= DW_BLOCK (attr
)->data
;
11852 parameter
->value_size
= DW_BLOCK (attr
)->size
;
11854 /* Parameters are not pre-cleared by memset above. */
11855 parameter
->data_value
= NULL
;
11856 parameter
->data_value_size
= 0;
11857 call_site
->parameter_count
++;
11859 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
11862 if (!attr_form_is_block (attr
))
11863 complaint (&symfile_complaints
,
11864 _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for "
11865 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11866 child_die
->offset
.sect_off
, objfile_name (objfile
));
11869 parameter
->data_value
= DW_BLOCK (attr
)->data
;
11870 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
11876 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET.
11877 Return 1 if the attributes are present and valid, otherwise, return 0. */
11880 dwarf2_ranges_process (unsigned offset
, struct dwarf2_cu
*cu
,
11881 std::function
<void (CORE_ADDR range_beginning
,
11882 CORE_ADDR range_end
)> callback
)
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
;
11895 CORE_ADDR baseaddr
;
11897 found_base
= cu
->base_known
;
11898 base
= cu
->base_address
;
11900 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
11901 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
11903 complaint (&symfile_complaints
,
11904 _("Offset %d out of bounds for DW_AT_ranges attribute"),
11908 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
11910 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11914 CORE_ADDR range_beginning
, range_end
;
11916 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
11917 buffer
+= addr_size
;
11918 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
11919 buffer
+= addr_size
;
11920 offset
+= 2 * addr_size
;
11922 /* An end of list marker is a pair of zero addresses. */
11923 if (range_beginning
== 0 && range_end
== 0)
11924 /* Found the end of list entry. */
11927 /* Each base address selection entry is a pair of 2 values.
11928 The first is the largest possible address, the second is
11929 the base address. Check for a base address here. */
11930 if ((range_beginning
& mask
) == mask
)
11932 /* If we found the largest possible address, then we already
11933 have the base address in range_end. */
11941 /* We have no valid base address for the ranges
11943 complaint (&symfile_complaints
,
11944 _("Invalid .debug_ranges data (no base address)"));
11948 if (range_beginning
> range_end
)
11950 /* Inverted range entries are invalid. */
11951 complaint (&symfile_complaints
,
11952 _("Invalid .debug_ranges data (inverted range)"));
11956 /* Empty range entries have no effect. */
11957 if (range_beginning
== range_end
)
11960 range_beginning
+= base
;
11963 /* A not-uncommon case of bad debug info.
11964 Don't pollute the addrmap with bad data. */
11965 if (range_beginning
+ baseaddr
== 0
11966 && !dwarf2_per_objfile
->has_section_at_zero
)
11968 complaint (&symfile_complaints
,
11969 _(".debug_ranges entry has start address of zero"
11970 " [in module %s]"), objfile_name (objfile
));
11974 callback (range_beginning
, range_end
);
11980 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
11981 Return 1 if the attributes are present and valid, otherwise, return 0.
11982 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
11985 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
11986 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
11987 struct partial_symtab
*ranges_pst
)
11989 struct objfile
*objfile
= cu
->objfile
;
11990 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11991 const CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
11992 SECT_OFF_TEXT (objfile
));
11995 CORE_ADDR high
= 0;
11998 retval
= dwarf2_ranges_process (offset
, cu
,
11999 [&] (CORE_ADDR range_beginning
, CORE_ADDR range_end
)
12001 if (ranges_pst
!= NULL
)
12006 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
12007 range_beginning
+ baseaddr
);
12008 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
12009 range_end
+ baseaddr
);
12010 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
12014 /* FIXME: This is recording everything as a low-high
12015 segment of consecutive addresses. We should have a
12016 data structure for discontiguous block ranges
12020 low
= range_beginning
;
12026 if (range_beginning
< low
)
12027 low
= range_beginning
;
12028 if (range_end
> high
)
12036 /* If the first entry is an end-of-list marker, the range
12037 describes an empty scope, i.e. no instructions. */
12043 *high_return
= high
;
12047 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
12048 definition for the return value. *LOWPC and *HIGHPC are set iff
12049 neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */
12051 static enum pc_bounds_kind
12052 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
12053 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
12054 struct partial_symtab
*pst
)
12056 struct attribute
*attr
;
12057 struct attribute
*attr_high
;
12059 CORE_ADDR high
= 0;
12060 enum pc_bounds_kind ret
;
12062 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
12065 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
12068 low
= attr_value_as_address (attr
);
12069 high
= attr_value_as_address (attr_high
);
12070 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
12074 /* Found high w/o low attribute. */
12075 return PC_BOUNDS_INVALID
;
12077 /* Found consecutive range of addresses. */
12078 ret
= PC_BOUNDS_HIGH_LOW
;
12082 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
12085 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
12086 We take advantage of the fact that DW_AT_ranges does not appear
12087 in DW_TAG_compile_unit of DWO files. */
12088 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
12089 unsigned int ranges_offset
= (DW_UNSND (attr
)
12090 + (need_ranges_base
12094 /* Value of the DW_AT_ranges attribute is the offset in the
12095 .debug_ranges section. */
12096 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
12097 return PC_BOUNDS_INVALID
;
12098 /* Found discontinuous range of addresses. */
12099 ret
= PC_BOUNDS_RANGES
;
12102 return PC_BOUNDS_NOT_PRESENT
;
12105 /* read_partial_die has also the strict LOW < HIGH requirement. */
12107 return PC_BOUNDS_INVALID
;
12109 /* When using the GNU linker, .gnu.linkonce. sections are used to
12110 eliminate duplicate copies of functions and vtables and such.
12111 The linker will arbitrarily choose one and discard the others.
12112 The AT_*_pc values for such functions refer to local labels in
12113 these sections. If the section from that file was discarded, the
12114 labels are not in the output, so the relocs get a value of 0.
12115 If this is a discarded function, mark the pc bounds as invalid,
12116 so that GDB will ignore it. */
12117 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12118 return PC_BOUNDS_INVALID
;
12126 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
12127 its low and high PC addresses. Do nothing if these addresses could not
12128 be determined. Otherwise, set LOWPC to the low address if it is smaller,
12129 and HIGHPC to the high address if greater than HIGHPC. */
12132 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
12133 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
12134 struct dwarf2_cu
*cu
)
12136 CORE_ADDR low
, high
;
12137 struct die_info
*child
= die
->child
;
12139 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
) >= PC_BOUNDS_RANGES
)
12141 *lowpc
= std::min (*lowpc
, low
);
12142 *highpc
= std::max (*highpc
, high
);
12145 /* If the language does not allow nested subprograms (either inside
12146 subprograms or lexical blocks), we're done. */
12147 if (cu
->language
!= language_ada
)
12150 /* Check all the children of the given DIE. If it contains nested
12151 subprograms, then check their pc bounds. Likewise, we need to
12152 check lexical blocks as well, as they may also contain subprogram
12154 while (child
&& child
->tag
)
12156 if (child
->tag
== DW_TAG_subprogram
12157 || child
->tag
== DW_TAG_lexical_block
)
12158 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
12159 child
= sibling_die (child
);
12163 /* Get the low and high pc's represented by the scope DIE, and store
12164 them in *LOWPC and *HIGHPC. If the correct values can't be
12165 determined, set *LOWPC to -1 and *HIGHPC to 0. */
12168 get_scope_pc_bounds (struct die_info
*die
,
12169 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
12170 struct dwarf2_cu
*cu
)
12172 CORE_ADDR best_low
= (CORE_ADDR
) -1;
12173 CORE_ADDR best_high
= (CORE_ADDR
) 0;
12174 CORE_ADDR current_low
, current_high
;
12176 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
12177 >= PC_BOUNDS_RANGES
)
12179 best_low
= current_low
;
12180 best_high
= current_high
;
12184 struct die_info
*child
= die
->child
;
12186 while (child
&& child
->tag
)
12188 switch (child
->tag
) {
12189 case DW_TAG_subprogram
:
12190 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
12192 case DW_TAG_namespace
:
12193 case DW_TAG_module
:
12194 /* FIXME: carlton/2004-01-16: Should we do this for
12195 DW_TAG_class_type/DW_TAG_structure_type, too? I think
12196 that current GCC's always emit the DIEs corresponding
12197 to definitions of methods of classes as children of a
12198 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
12199 the DIEs giving the declarations, which could be
12200 anywhere). But I don't see any reason why the
12201 standards says that they have to be there. */
12202 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
12204 if (current_low
!= ((CORE_ADDR
) -1))
12206 best_low
= std::min (best_low
, current_low
);
12207 best_high
= std::max (best_high
, current_high
);
12215 child
= sibling_die (child
);
12220 *highpc
= best_high
;
12223 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
12227 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
12228 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
12230 struct objfile
*objfile
= cu
->objfile
;
12231 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12232 struct attribute
*attr
;
12233 struct attribute
*attr_high
;
12235 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
12238 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
12241 CORE_ADDR low
= attr_value_as_address (attr
);
12242 CORE_ADDR high
= attr_value_as_address (attr_high
);
12244 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
12247 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
12248 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
12249 record_block_range (block
, low
, high
- 1);
12253 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
12256 bfd
*obfd
= objfile
->obfd
;
12257 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
12258 We take advantage of the fact that DW_AT_ranges does not appear
12259 in DW_TAG_compile_unit of DWO files. */
12260 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
12262 /* The value of the DW_AT_ranges attribute is the offset of the
12263 address range list in the .debug_ranges section. */
12264 unsigned long offset
= (DW_UNSND (attr
)
12265 + (need_ranges_base
? cu
->ranges_base
: 0));
12266 const gdb_byte
*buffer
;
12268 /* For some target architectures, but not others, the
12269 read_address function sign-extends the addresses it returns.
12270 To recognize base address selection entries, we need a
12272 unsigned int addr_size
= cu
->header
.addr_size
;
12273 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
12275 /* The base address, to which the next pair is relative. Note
12276 that this 'base' is a DWARF concept: most entries in a range
12277 list are relative, to reduce the number of relocs against the
12278 debugging information. This is separate from this function's
12279 'baseaddr' argument, which GDB uses to relocate debugging
12280 information from a shared library based on the address at
12281 which the library was loaded. */
12282 CORE_ADDR base
= cu
->base_address
;
12283 int base_known
= cu
->base_known
;
12285 dwarf2_ranges_process (offset
, cu
,
12286 [&] (CORE_ADDR start
, CORE_ADDR end
)
12288 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
12289 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
12290 record_block_range (block
, start
, end
- 1);
12295 /* Check whether the producer field indicates either of GCC < 4.6, or the
12296 Intel C/C++ compiler, and cache the result in CU. */
12299 check_producer (struct dwarf2_cu
*cu
)
12303 if (cu
->producer
== NULL
)
12305 /* For unknown compilers expect their behavior is DWARF version
12308 GCC started to support .debug_types sections by -gdwarf-4 since
12309 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
12310 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
12311 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
12312 interpreted incorrectly by GDB now - GCC PR debug/48229. */
12314 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
12316 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
12317 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
12319 else if (startswith (cu
->producer
, "Intel(R) C"))
12320 cu
->producer_is_icc
= 1;
12323 /* For other non-GCC compilers, expect their behavior is DWARF version
12327 cu
->checked_producer
= 1;
12330 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
12331 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
12332 during 4.6.0 experimental. */
12335 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
12337 if (!cu
->checked_producer
)
12338 check_producer (cu
);
12340 return cu
->producer_is_gxx_lt_4_6
;
12343 /* Return the default accessibility type if it is not overriden by
12344 DW_AT_accessibility. */
12346 static enum dwarf_access_attribute
12347 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
12349 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
12351 /* The default DWARF 2 accessibility for members is public, the default
12352 accessibility for inheritance is private. */
12354 if (die
->tag
!= DW_TAG_inheritance
)
12355 return DW_ACCESS_public
;
12357 return DW_ACCESS_private
;
12361 /* DWARF 3+ defines the default accessibility a different way. The same
12362 rules apply now for DW_TAG_inheritance as for the members and it only
12363 depends on the container kind. */
12365 if (die
->parent
->tag
== DW_TAG_class_type
)
12366 return DW_ACCESS_private
;
12368 return DW_ACCESS_public
;
12372 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
12373 offset. If the attribute was not found return 0, otherwise return
12374 1. If it was found but could not properly be handled, set *OFFSET
12378 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
12381 struct attribute
*attr
;
12383 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
12388 /* Note that we do not check for a section offset first here.
12389 This is because DW_AT_data_member_location is new in DWARF 4,
12390 so if we see it, we can assume that a constant form is really
12391 a constant and not a section offset. */
12392 if (attr_form_is_constant (attr
))
12393 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
12394 else if (attr_form_is_section_offset (attr
))
12395 dwarf2_complex_location_expr_complaint ();
12396 else if (attr_form_is_block (attr
))
12397 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12399 dwarf2_complex_location_expr_complaint ();
12407 /* Add an aggregate field to the field list. */
12410 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
12411 struct dwarf2_cu
*cu
)
12413 struct objfile
*objfile
= cu
->objfile
;
12414 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12415 struct nextfield
*new_field
;
12416 struct attribute
*attr
;
12418 const char *fieldname
= "";
12420 /* Allocate a new field list entry and link it in. */
12421 new_field
= XNEW (struct nextfield
);
12422 make_cleanup (xfree
, new_field
);
12423 memset (new_field
, 0, sizeof (struct nextfield
));
12425 if (die
->tag
== DW_TAG_inheritance
)
12427 new_field
->next
= fip
->baseclasses
;
12428 fip
->baseclasses
= new_field
;
12432 new_field
->next
= fip
->fields
;
12433 fip
->fields
= new_field
;
12437 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
12439 new_field
->accessibility
= DW_UNSND (attr
);
12441 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
12442 if (new_field
->accessibility
!= DW_ACCESS_public
)
12443 fip
->non_public_fields
= 1;
12445 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
12447 new_field
->virtuality
= DW_UNSND (attr
);
12449 new_field
->virtuality
= DW_VIRTUALITY_none
;
12451 fp
= &new_field
->field
;
12453 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
12457 /* Data member other than a C++ static data member. */
12459 /* Get type of field. */
12460 fp
->type
= die_type (die
, cu
);
12462 SET_FIELD_BITPOS (*fp
, 0);
12464 /* Get bit size of field (zero if none). */
12465 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
12468 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
12472 FIELD_BITSIZE (*fp
) = 0;
12475 /* Get bit offset of field. */
12476 if (handle_data_member_location (die
, cu
, &offset
))
12477 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
12478 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
12481 if (gdbarch_bits_big_endian (gdbarch
))
12483 /* For big endian bits, the DW_AT_bit_offset gives the
12484 additional bit offset from the MSB of the containing
12485 anonymous object to the MSB of the field. We don't
12486 have to do anything special since we don't need to
12487 know the size of the anonymous object. */
12488 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
12492 /* For little endian bits, compute the bit offset to the
12493 MSB of the anonymous object, subtract off the number of
12494 bits from the MSB of the field to the MSB of the
12495 object, and then subtract off the number of bits of
12496 the field itself. The result is the bit offset of
12497 the LSB of the field. */
12498 int anonymous_size
;
12499 int bit_offset
= DW_UNSND (attr
);
12501 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12504 /* The size of the anonymous object containing
12505 the bit field is explicit, so use the
12506 indicated size (in bytes). */
12507 anonymous_size
= DW_UNSND (attr
);
12511 /* The size of the anonymous object containing
12512 the bit field must be inferred from the type
12513 attribute of the data member containing the
12515 anonymous_size
= TYPE_LENGTH (fp
->type
);
12517 SET_FIELD_BITPOS (*fp
,
12518 (FIELD_BITPOS (*fp
)
12519 + anonymous_size
* bits_per_byte
12520 - bit_offset
- FIELD_BITSIZE (*fp
)));
12523 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
12525 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
12526 + dwarf2_get_attr_constant_value (attr
, 0)));
12528 /* Get name of field. */
12529 fieldname
= dwarf2_name (die
, cu
);
12530 if (fieldname
== NULL
)
12533 /* The name is already allocated along with this objfile, so we don't
12534 need to duplicate it for the type. */
12535 fp
->name
= fieldname
;
12537 /* Change accessibility for artificial fields (e.g. virtual table
12538 pointer or virtual base class pointer) to private. */
12539 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
12541 FIELD_ARTIFICIAL (*fp
) = 1;
12542 new_field
->accessibility
= DW_ACCESS_private
;
12543 fip
->non_public_fields
= 1;
12546 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
12548 /* C++ static member. */
12550 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
12551 is a declaration, but all versions of G++ as of this writing
12552 (so through at least 3.2.1) incorrectly generate
12553 DW_TAG_variable tags. */
12555 const char *physname
;
12557 /* Get name of field. */
12558 fieldname
= dwarf2_name (die
, cu
);
12559 if (fieldname
== NULL
)
12562 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
12564 /* Only create a symbol if this is an external value.
12565 new_symbol checks this and puts the value in the global symbol
12566 table, which we want. If it is not external, new_symbol
12567 will try to put the value in cu->list_in_scope which is wrong. */
12568 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
12570 /* A static const member, not much different than an enum as far as
12571 we're concerned, except that we can support more types. */
12572 new_symbol (die
, NULL
, cu
);
12575 /* Get physical name. */
12576 physname
= dwarf2_physname (fieldname
, die
, cu
);
12578 /* The name is already allocated along with this objfile, so we don't
12579 need to duplicate it for the type. */
12580 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
12581 FIELD_TYPE (*fp
) = die_type (die
, cu
);
12582 FIELD_NAME (*fp
) = fieldname
;
12584 else if (die
->tag
== DW_TAG_inheritance
)
12588 /* C++ base class field. */
12589 if (handle_data_member_location (die
, cu
, &offset
))
12590 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
12591 FIELD_BITSIZE (*fp
) = 0;
12592 FIELD_TYPE (*fp
) = die_type (die
, cu
);
12593 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
12594 fip
->nbaseclasses
++;
12598 /* Add a typedef defined in the scope of the FIP's class. */
12601 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
12602 struct dwarf2_cu
*cu
)
12604 struct typedef_field_list
*new_field
;
12605 struct typedef_field
*fp
;
12607 /* Allocate a new field list entry and link it in. */
12608 new_field
= XCNEW (struct typedef_field_list
);
12609 make_cleanup (xfree
, new_field
);
12611 gdb_assert (die
->tag
== DW_TAG_typedef
);
12613 fp
= &new_field
->field
;
12615 /* Get name of field. */
12616 fp
->name
= dwarf2_name (die
, cu
);
12617 if (fp
->name
== NULL
)
12620 fp
->type
= read_type_die (die
, cu
);
12622 new_field
->next
= fip
->typedef_field_list
;
12623 fip
->typedef_field_list
= new_field
;
12624 fip
->typedef_field_list_count
++;
12627 /* Create the vector of fields, and attach it to the type. */
12630 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
12631 struct dwarf2_cu
*cu
)
12633 int nfields
= fip
->nfields
;
12635 /* Record the field count, allocate space for the array of fields,
12636 and create blank accessibility bitfields if necessary. */
12637 TYPE_NFIELDS (type
) = nfields
;
12638 TYPE_FIELDS (type
) = (struct field
*)
12639 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
12640 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
12642 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
12644 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12646 TYPE_FIELD_PRIVATE_BITS (type
) =
12647 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12648 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
12650 TYPE_FIELD_PROTECTED_BITS (type
) =
12651 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12652 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
12654 TYPE_FIELD_IGNORE_BITS (type
) =
12655 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12656 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
12659 /* If the type has baseclasses, allocate and clear a bit vector for
12660 TYPE_FIELD_VIRTUAL_BITS. */
12661 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
12663 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
12664 unsigned char *pointer
;
12666 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12667 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
12668 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
12669 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
12670 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
12673 /* Copy the saved-up fields into the field vector. Start from the head of
12674 the list, adding to the tail of the field array, so that they end up in
12675 the same order in the array in which they were added to the list. */
12676 while (nfields
-- > 0)
12678 struct nextfield
*fieldp
;
12682 fieldp
= fip
->fields
;
12683 fip
->fields
= fieldp
->next
;
12687 fieldp
= fip
->baseclasses
;
12688 fip
->baseclasses
= fieldp
->next
;
12691 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
12692 switch (fieldp
->accessibility
)
12694 case DW_ACCESS_private
:
12695 if (cu
->language
!= language_ada
)
12696 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
12699 case DW_ACCESS_protected
:
12700 if (cu
->language
!= language_ada
)
12701 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
12704 case DW_ACCESS_public
:
12708 /* Unknown accessibility. Complain and treat it as public. */
12710 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
12711 fieldp
->accessibility
);
12715 if (nfields
< fip
->nbaseclasses
)
12717 switch (fieldp
->virtuality
)
12719 case DW_VIRTUALITY_virtual
:
12720 case DW_VIRTUALITY_pure_virtual
:
12721 if (cu
->language
== language_ada
)
12722 error (_("unexpected virtuality in component of Ada type"));
12723 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
12730 /* Return true if this member function is a constructor, false
12734 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
12736 const char *fieldname
;
12737 const char *type_name
;
12740 if (die
->parent
== NULL
)
12743 if (die
->parent
->tag
!= DW_TAG_structure_type
12744 && die
->parent
->tag
!= DW_TAG_union_type
12745 && die
->parent
->tag
!= DW_TAG_class_type
)
12748 fieldname
= dwarf2_name (die
, cu
);
12749 type_name
= dwarf2_name (die
->parent
, cu
);
12750 if (fieldname
== NULL
|| type_name
== NULL
)
12753 len
= strlen (fieldname
);
12754 return (strncmp (fieldname
, type_name
, len
) == 0
12755 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
12758 /* Add a member function to the proper fieldlist. */
12761 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
12762 struct type
*type
, struct dwarf2_cu
*cu
)
12764 struct objfile
*objfile
= cu
->objfile
;
12765 struct attribute
*attr
;
12766 struct fnfieldlist
*flp
;
12768 struct fn_field
*fnp
;
12769 const char *fieldname
;
12770 struct nextfnfield
*new_fnfield
;
12771 struct type
*this_type
;
12772 enum dwarf_access_attribute accessibility
;
12774 if (cu
->language
== language_ada
)
12775 error (_("unexpected member function in Ada type"));
12777 /* Get name of member function. */
12778 fieldname
= dwarf2_name (die
, cu
);
12779 if (fieldname
== NULL
)
12782 /* Look up member function name in fieldlist. */
12783 for (i
= 0; i
< fip
->nfnfields
; i
++)
12785 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
12789 /* Create new list element if necessary. */
12790 if (i
< fip
->nfnfields
)
12791 flp
= &fip
->fnfieldlists
[i
];
12794 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
12796 fip
->fnfieldlists
= (struct fnfieldlist
*)
12797 xrealloc (fip
->fnfieldlists
,
12798 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
12799 * sizeof (struct fnfieldlist
));
12800 if (fip
->nfnfields
== 0)
12801 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
12803 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
12804 flp
->name
= fieldname
;
12807 i
= fip
->nfnfields
++;
12810 /* Create a new member function field and chain it to the field list
12812 new_fnfield
= XNEW (struct nextfnfield
);
12813 make_cleanup (xfree
, new_fnfield
);
12814 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
12815 new_fnfield
->next
= flp
->head
;
12816 flp
->head
= new_fnfield
;
12819 /* Fill in the member function field info. */
12820 fnp
= &new_fnfield
->fnfield
;
12822 /* Delay processing of the physname until later. */
12823 if (cu
->language
== language_cplus
)
12825 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
12830 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
12831 fnp
->physname
= physname
? physname
: "";
12834 fnp
->type
= alloc_type (objfile
);
12835 this_type
= read_type_die (die
, cu
);
12836 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
12838 int nparams
= TYPE_NFIELDS (this_type
);
12840 /* TYPE is the domain of this method, and THIS_TYPE is the type
12841 of the method itself (TYPE_CODE_METHOD). */
12842 smash_to_method_type (fnp
->type
, type
,
12843 TYPE_TARGET_TYPE (this_type
),
12844 TYPE_FIELDS (this_type
),
12845 TYPE_NFIELDS (this_type
),
12846 TYPE_VARARGS (this_type
));
12848 /* Handle static member functions.
12849 Dwarf2 has no clean way to discern C++ static and non-static
12850 member functions. G++ helps GDB by marking the first
12851 parameter for non-static member functions (which is the this
12852 pointer) as artificial. We obtain this information from
12853 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
12854 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
12855 fnp
->voffset
= VOFFSET_STATIC
;
12858 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
12859 dwarf2_full_name (fieldname
, die
, cu
));
12861 /* Get fcontext from DW_AT_containing_type if present. */
12862 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
12863 fnp
->fcontext
= die_containing_type (die
, cu
);
12865 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
12866 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
12868 /* Get accessibility. */
12869 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
12871 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
12873 accessibility
= dwarf2_default_access_attribute (die
, cu
);
12874 switch (accessibility
)
12876 case DW_ACCESS_private
:
12877 fnp
->is_private
= 1;
12879 case DW_ACCESS_protected
:
12880 fnp
->is_protected
= 1;
12884 /* Check for artificial methods. */
12885 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
12886 if (attr
&& DW_UNSND (attr
) != 0)
12887 fnp
->is_artificial
= 1;
12889 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
12891 /* Get index in virtual function table if it is a virtual member
12892 function. For older versions of GCC, this is an offset in the
12893 appropriate virtual table, as specified by DW_AT_containing_type.
12894 For everyone else, it is an expression to be evaluated relative
12895 to the object address. */
12897 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
12900 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
12902 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
12904 /* Old-style GCC. */
12905 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
12907 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
12908 || (DW_BLOCK (attr
)->size
> 1
12909 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
12910 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
12912 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12913 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
12914 dwarf2_complex_location_expr_complaint ();
12916 fnp
->voffset
/= cu
->header
.addr_size
;
12920 dwarf2_complex_location_expr_complaint ();
12922 if (!fnp
->fcontext
)
12924 /* If there is no `this' field and no DW_AT_containing_type,
12925 we cannot actually find a base class context for the
12927 if (TYPE_NFIELDS (this_type
) == 0
12928 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
12930 complaint (&symfile_complaints
,
12931 _("cannot determine context for virtual member "
12932 "function \"%s\" (offset %d)"),
12933 fieldname
, die
->offset
.sect_off
);
12938 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
12942 else if (attr_form_is_section_offset (attr
))
12944 dwarf2_complex_location_expr_complaint ();
12948 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
12954 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
12955 if (attr
&& DW_UNSND (attr
))
12957 /* GCC does this, as of 2008-08-25; PR debug/37237. */
12958 complaint (&symfile_complaints
,
12959 _("Member function \"%s\" (offset %d) is virtual "
12960 "but the vtable offset is not specified"),
12961 fieldname
, die
->offset
.sect_off
);
12962 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12963 TYPE_CPLUS_DYNAMIC (type
) = 1;
12968 /* Create the vector of member function fields, and attach it to the type. */
12971 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
12972 struct dwarf2_cu
*cu
)
12974 struct fnfieldlist
*flp
;
12977 if (cu
->language
== language_ada
)
12978 error (_("unexpected member functions in Ada type"));
12980 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12981 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
12982 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
12984 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
12986 struct nextfnfield
*nfp
= flp
->head
;
12987 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
12990 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
12991 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
12992 fn_flp
->fn_fields
= (struct fn_field
*)
12993 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
12994 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
12995 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
12998 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
13001 /* Returns non-zero if NAME is the name of a vtable member in CU's
13002 language, zero otherwise. */
13004 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
13006 static const char vptr
[] = "_vptr";
13007 static const char vtable
[] = "vtable";
13009 /* Look for the C++ form of the vtable. */
13010 if (startswith (name
, vptr
) && is_cplus_marker (name
[sizeof (vptr
) - 1]))
13016 /* GCC outputs unnamed structures that are really pointers to member
13017 functions, with the ABI-specified layout. If TYPE describes
13018 such a structure, smash it into a member function type.
13020 GCC shouldn't do this; it should just output pointer to member DIEs.
13021 This is GCC PR debug/28767. */
13024 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
13026 struct type
*pfn_type
, *self_type
, *new_type
;
13028 /* Check for a structure with no name and two children. */
13029 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
13032 /* Check for __pfn and __delta members. */
13033 if (TYPE_FIELD_NAME (type
, 0) == NULL
13034 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
13035 || TYPE_FIELD_NAME (type
, 1) == NULL
13036 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
13039 /* Find the type of the method. */
13040 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
13041 if (pfn_type
== NULL
13042 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
13043 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
13046 /* Look for the "this" argument. */
13047 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
13048 if (TYPE_NFIELDS (pfn_type
) == 0
13049 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
13050 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
13053 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
13054 new_type
= alloc_type (objfile
);
13055 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
13056 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
13057 TYPE_VARARGS (pfn_type
));
13058 smash_to_methodptr_type (type
, new_type
);
13061 /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler
13065 producer_is_icc (struct dwarf2_cu
*cu
)
13067 if (!cu
->checked_producer
)
13068 check_producer (cu
);
13070 return cu
->producer_is_icc
;
13073 /* Called when we find the DIE that starts a structure or union scope
13074 (definition) to create a type for the structure or union. Fill in
13075 the type's name and general properties; the members will not be
13076 processed until process_structure_scope. A symbol table entry for
13077 the type will also not be done until process_structure_scope (assuming
13078 the type has a name).
13080 NOTE: we need to call these functions regardless of whether or not the
13081 DIE has a DW_AT_name attribute, since it might be an anonymous
13082 structure or union. This gets the type entered into our set of
13083 user defined types. */
13085 static struct type
*
13086 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13088 struct objfile
*objfile
= cu
->objfile
;
13090 struct attribute
*attr
;
13093 /* If the definition of this type lives in .debug_types, read that type.
13094 Don't follow DW_AT_specification though, that will take us back up
13095 the chain and we want to go down. */
13096 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
13099 type
= get_DW_AT_signature_type (die
, attr
, cu
);
13101 /* The type's CU may not be the same as CU.
13102 Ensure TYPE is recorded with CU in die_type_hash. */
13103 return set_die_type (die
, type
, cu
);
13106 type
= alloc_type (objfile
);
13107 INIT_CPLUS_SPECIFIC (type
);
13109 name
= dwarf2_name (die
, cu
);
13112 if (cu
->language
== language_cplus
13113 || cu
->language
== language_d
13114 || cu
->language
== language_rust
)
13116 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
13118 /* dwarf2_full_name might have already finished building the DIE's
13119 type. If so, there is no need to continue. */
13120 if (get_die_type (die
, cu
) != NULL
)
13121 return get_die_type (die
, cu
);
13123 TYPE_TAG_NAME (type
) = full_name
;
13124 if (die
->tag
== DW_TAG_structure_type
13125 || die
->tag
== DW_TAG_class_type
)
13126 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
13130 /* The name is already allocated along with this objfile, so
13131 we don't need to duplicate it for the type. */
13132 TYPE_TAG_NAME (type
) = name
;
13133 if (die
->tag
== DW_TAG_class_type
)
13134 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
13138 if (die
->tag
== DW_TAG_structure_type
)
13140 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13142 else if (die
->tag
== DW_TAG_union_type
)
13144 TYPE_CODE (type
) = TYPE_CODE_UNION
;
13148 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13151 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
13152 TYPE_DECLARED_CLASS (type
) = 1;
13154 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13157 if (attr_form_is_constant (attr
))
13158 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13161 /* For the moment, dynamic type sizes are not supported
13162 by GDB's struct type. The actual size is determined
13163 on-demand when resolving the type of a given object,
13164 so set the type's length to zero for now. Otherwise,
13165 we record an expression as the length, and that expression
13166 could lead to a very large value, which could eventually
13167 lead to us trying to allocate that much memory when creating
13168 a value of that type. */
13169 TYPE_LENGTH (type
) = 0;
13174 TYPE_LENGTH (type
) = 0;
13177 if (producer_is_icc (cu
) && (TYPE_LENGTH (type
) == 0))
13179 /* ICC does not output the required DW_AT_declaration
13180 on incomplete types, but gives them a size of zero. */
13181 TYPE_STUB (type
) = 1;
13184 TYPE_STUB_SUPPORTED (type
) = 1;
13186 if (die_is_declaration (die
, cu
))
13187 TYPE_STUB (type
) = 1;
13188 else if (attr
== NULL
&& die
->child
== NULL
13189 && producer_is_realview (cu
->producer
))
13190 /* RealView does not output the required DW_AT_declaration
13191 on incomplete types. */
13192 TYPE_STUB (type
) = 1;
13194 /* We need to add the type field to the die immediately so we don't
13195 infinitely recurse when dealing with pointers to the structure
13196 type within the structure itself. */
13197 set_die_type (die
, type
, cu
);
13199 /* set_die_type should be already done. */
13200 set_descriptive_type (type
, die
, cu
);
13205 /* Finish creating a structure or union type, including filling in
13206 its members and creating a symbol for it. */
13209 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13211 struct objfile
*objfile
= cu
->objfile
;
13212 struct die_info
*child_die
;
13215 type
= get_die_type (die
, cu
);
13217 type
= read_structure_type (die
, cu
);
13219 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
13221 struct field_info fi
;
13222 VEC (symbolp
) *template_args
= NULL
;
13223 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
13225 memset (&fi
, 0, sizeof (struct field_info
));
13227 child_die
= die
->child
;
13229 while (child_die
&& child_die
->tag
)
13231 if (child_die
->tag
== DW_TAG_member
13232 || child_die
->tag
== DW_TAG_variable
)
13234 /* NOTE: carlton/2002-11-05: A C++ static data member
13235 should be a DW_TAG_member that is a declaration, but
13236 all versions of G++ as of this writing (so through at
13237 least 3.2.1) incorrectly generate DW_TAG_variable
13238 tags for them instead. */
13239 dwarf2_add_field (&fi
, child_die
, cu
);
13241 else if (child_die
->tag
== DW_TAG_subprogram
)
13243 /* Rust doesn't have member functions in the C++ sense.
13244 However, it does emit ordinary functions as children
13245 of a struct DIE. */
13246 if (cu
->language
== language_rust
)
13247 read_func_scope (child_die
, cu
);
13250 /* C++ member function. */
13251 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
13254 else if (child_die
->tag
== DW_TAG_inheritance
)
13256 /* C++ base class field. */
13257 dwarf2_add_field (&fi
, child_die
, cu
);
13259 else if (child_die
->tag
== DW_TAG_typedef
)
13260 dwarf2_add_typedef (&fi
, child_die
, cu
);
13261 else if (child_die
->tag
== DW_TAG_template_type_param
13262 || child_die
->tag
== DW_TAG_template_value_param
)
13264 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13267 VEC_safe_push (symbolp
, template_args
, arg
);
13270 child_die
= sibling_die (child_die
);
13273 /* Attach template arguments to type. */
13274 if (! VEC_empty (symbolp
, template_args
))
13276 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13277 TYPE_N_TEMPLATE_ARGUMENTS (type
)
13278 = VEC_length (symbolp
, template_args
);
13279 TYPE_TEMPLATE_ARGUMENTS (type
)
13280 = XOBNEWVEC (&objfile
->objfile_obstack
,
13282 TYPE_N_TEMPLATE_ARGUMENTS (type
));
13283 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
13284 VEC_address (symbolp
, template_args
),
13285 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
13286 * sizeof (struct symbol
*)));
13287 VEC_free (symbolp
, template_args
);
13290 /* Attach fields and member functions to the type. */
13292 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
13295 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
13297 /* Get the type which refers to the base class (possibly this
13298 class itself) which contains the vtable pointer for the current
13299 class from the DW_AT_containing_type attribute. This use of
13300 DW_AT_containing_type is a GNU extension. */
13302 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
13304 struct type
*t
= die_containing_type (die
, cu
);
13306 set_type_vptr_basetype (type
, t
);
13311 /* Our own class provides vtbl ptr. */
13312 for (i
= TYPE_NFIELDS (t
) - 1;
13313 i
>= TYPE_N_BASECLASSES (t
);
13316 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
13318 if (is_vtable_name (fieldname
, cu
))
13320 set_type_vptr_fieldno (type
, i
);
13325 /* Complain if virtual function table field not found. */
13326 if (i
< TYPE_N_BASECLASSES (t
))
13327 complaint (&symfile_complaints
,
13328 _("virtual function table pointer "
13329 "not found when defining class '%s'"),
13330 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
13335 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
13338 else if (cu
->producer
13339 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
13341 /* The IBM XLC compiler does not provide direct indication
13342 of the containing type, but the vtable pointer is
13343 always named __vfp. */
13347 for (i
= TYPE_NFIELDS (type
) - 1;
13348 i
>= TYPE_N_BASECLASSES (type
);
13351 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
13353 set_type_vptr_fieldno (type
, i
);
13354 set_type_vptr_basetype (type
, type
);
13361 /* Copy fi.typedef_field_list linked list elements content into the
13362 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
13363 if (fi
.typedef_field_list
)
13365 int i
= fi
.typedef_field_list_count
;
13367 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13368 TYPE_TYPEDEF_FIELD_ARRAY (type
)
13369 = ((struct typedef_field
*)
13370 TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
));
13371 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
13373 /* Reverse the list order to keep the debug info elements order. */
13376 struct typedef_field
*dest
, *src
;
13378 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
13379 src
= &fi
.typedef_field_list
->field
;
13380 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
13385 do_cleanups (back_to
);
13388 quirk_gcc_member_function_pointer (type
, objfile
);
13390 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
13391 snapshots) has been known to create a die giving a declaration
13392 for a class that has, as a child, a die giving a definition for a
13393 nested class. So we have to process our children even if the
13394 current die is a declaration. Normally, of course, a declaration
13395 won't have any children at all. */
13397 child_die
= die
->child
;
13399 while (child_die
!= NULL
&& child_die
->tag
)
13401 if (child_die
->tag
== DW_TAG_member
13402 || child_die
->tag
== DW_TAG_variable
13403 || child_die
->tag
== DW_TAG_inheritance
13404 || child_die
->tag
== DW_TAG_template_value_param
13405 || child_die
->tag
== DW_TAG_template_type_param
)
13410 process_die (child_die
, cu
);
13412 child_die
= sibling_die (child_die
);
13415 /* Do not consider external references. According to the DWARF standard,
13416 these DIEs are identified by the fact that they have no byte_size
13417 attribute, and a declaration attribute. */
13418 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
13419 || !die_is_declaration (die
, cu
))
13420 new_symbol (die
, type
, cu
);
13423 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
13424 update TYPE using some information only available in DIE's children. */
13427 update_enumeration_type_from_children (struct die_info
*die
,
13429 struct dwarf2_cu
*cu
)
13431 struct obstack obstack
;
13432 struct die_info
*child_die
;
13433 int unsigned_enum
= 1;
13436 struct cleanup
*old_chain
;
13438 obstack_init (&obstack
);
13439 old_chain
= make_cleanup_obstack_free (&obstack
);
13441 for (child_die
= die
->child
;
13442 child_die
!= NULL
&& child_die
->tag
;
13443 child_die
= sibling_die (child_die
))
13445 struct attribute
*attr
;
13447 const gdb_byte
*bytes
;
13448 struct dwarf2_locexpr_baton
*baton
;
13451 if (child_die
->tag
!= DW_TAG_enumerator
)
13454 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
13458 name
= dwarf2_name (child_die
, cu
);
13460 name
= "<anonymous enumerator>";
13462 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
13463 &value
, &bytes
, &baton
);
13469 else if ((mask
& value
) != 0)
13474 /* If we already know that the enum type is neither unsigned, nor
13475 a flag type, no need to look at the rest of the enumerates. */
13476 if (!unsigned_enum
&& !flag_enum
)
13481 TYPE_UNSIGNED (type
) = 1;
13483 TYPE_FLAG_ENUM (type
) = 1;
13485 do_cleanups (old_chain
);
13488 /* Given a DW_AT_enumeration_type die, set its type. We do not
13489 complete the type's fields yet, or create any symbols. */
13491 static struct type
*
13492 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13494 struct objfile
*objfile
= cu
->objfile
;
13496 struct attribute
*attr
;
13499 /* If the definition of this type lives in .debug_types, read that type.
13500 Don't follow DW_AT_specification though, that will take us back up
13501 the chain and we want to go down. */
13502 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
13505 type
= get_DW_AT_signature_type (die
, attr
, cu
);
13507 /* The type's CU may not be the same as CU.
13508 Ensure TYPE is recorded with CU in die_type_hash. */
13509 return set_die_type (die
, type
, cu
);
13512 type
= alloc_type (objfile
);
13514 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
13515 name
= dwarf2_full_name (NULL
, die
, cu
);
13517 TYPE_TAG_NAME (type
) = name
;
13519 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
13522 struct type
*underlying_type
= die_type (die
, cu
);
13524 TYPE_TARGET_TYPE (type
) = underlying_type
;
13527 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13530 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13534 TYPE_LENGTH (type
) = 0;
13537 /* The enumeration DIE can be incomplete. In Ada, any type can be
13538 declared as private in the package spec, and then defined only
13539 inside the package body. Such types are known as Taft Amendment
13540 Types. When another package uses such a type, an incomplete DIE
13541 may be generated by the compiler. */
13542 if (die_is_declaration (die
, cu
))
13543 TYPE_STUB (type
) = 1;
13545 /* Finish the creation of this type by using the enum's children.
13546 We must call this even when the underlying type has been provided
13547 so that we can determine if we're looking at a "flag" enum. */
13548 update_enumeration_type_from_children (die
, type
, cu
);
13550 /* If this type has an underlying type that is not a stub, then we
13551 may use its attributes. We always use the "unsigned" attribute
13552 in this situation, because ordinarily we guess whether the type
13553 is unsigned -- but the guess can be wrong and the underlying type
13554 can tell us the reality. However, we defer to a local size
13555 attribute if one exists, because this lets the compiler override
13556 the underlying type if needed. */
13557 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
13559 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
13560 if (TYPE_LENGTH (type
) == 0)
13561 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
13564 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
13566 return set_die_type (die
, type
, cu
);
13569 /* Given a pointer to a die which begins an enumeration, process all
13570 the dies that define the members of the enumeration, and create the
13571 symbol for the enumeration type.
13573 NOTE: We reverse the order of the element list. */
13576 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13578 struct type
*this_type
;
13580 this_type
= get_die_type (die
, cu
);
13581 if (this_type
== NULL
)
13582 this_type
= read_enumeration_type (die
, cu
);
13584 if (die
->child
!= NULL
)
13586 struct die_info
*child_die
;
13587 struct symbol
*sym
;
13588 struct field
*fields
= NULL
;
13589 int num_fields
= 0;
13592 child_die
= die
->child
;
13593 while (child_die
&& child_die
->tag
)
13595 if (child_die
->tag
!= DW_TAG_enumerator
)
13597 process_die (child_die
, cu
);
13601 name
= dwarf2_name (child_die
, cu
);
13604 sym
= new_symbol (child_die
, this_type
, cu
);
13606 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
13608 fields
= (struct field
*)
13610 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
13611 * sizeof (struct field
));
13614 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
13615 FIELD_TYPE (fields
[num_fields
]) = NULL
;
13616 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
13617 FIELD_BITSIZE (fields
[num_fields
]) = 0;
13623 child_die
= sibling_die (child_die
);
13628 TYPE_NFIELDS (this_type
) = num_fields
;
13629 TYPE_FIELDS (this_type
) = (struct field
*)
13630 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
13631 memcpy (TYPE_FIELDS (this_type
), fields
,
13632 sizeof (struct field
) * num_fields
);
13637 /* If we are reading an enum from a .debug_types unit, and the enum
13638 is a declaration, and the enum is not the signatured type in the
13639 unit, then we do not want to add a symbol for it. Adding a
13640 symbol would in some cases obscure the true definition of the
13641 enum, giving users an incomplete type when the definition is
13642 actually available. Note that we do not want to do this for all
13643 enums which are just declarations, because C++0x allows forward
13644 enum declarations. */
13645 if (cu
->per_cu
->is_debug_types
13646 && die_is_declaration (die
, cu
))
13648 struct signatured_type
*sig_type
;
13650 sig_type
= (struct signatured_type
*) cu
->per_cu
;
13651 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
13652 if (sig_type
->type_offset_in_section
.sect_off
!= die
->offset
.sect_off
)
13656 new_symbol (die
, this_type
, cu
);
13659 /* Extract all information from a DW_TAG_array_type DIE and put it in
13660 the DIE's type field. For now, this only handles one dimensional
13663 static struct type
*
13664 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13666 struct objfile
*objfile
= cu
->objfile
;
13667 struct die_info
*child_die
;
13669 struct type
*element_type
, *range_type
, *index_type
;
13670 struct type
**range_types
= NULL
;
13671 struct attribute
*attr
;
13673 struct cleanup
*back_to
;
13675 unsigned int bit_stride
= 0;
13677 element_type
= die_type (die
, cu
);
13679 /* The die_type call above may have already set the type for this DIE. */
13680 type
= get_die_type (die
, cu
);
13684 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
13686 bit_stride
= DW_UNSND (attr
) * 8;
13688 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
13690 bit_stride
= DW_UNSND (attr
);
13692 /* Irix 6.2 native cc creates array types without children for
13693 arrays with unspecified length. */
13694 if (die
->child
== NULL
)
13696 index_type
= objfile_type (objfile
)->builtin_int
;
13697 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
13698 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
13700 return set_die_type (die
, type
, cu
);
13703 back_to
= make_cleanup (null_cleanup
, NULL
);
13704 child_die
= die
->child
;
13705 while (child_die
&& child_die
->tag
)
13707 if (child_die
->tag
== DW_TAG_subrange_type
)
13709 struct type
*child_type
= read_type_die (child_die
, cu
);
13711 if (child_type
!= NULL
)
13713 /* The range type was succesfully read. Save it for the
13714 array type creation. */
13715 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
13717 range_types
= (struct type
**)
13718 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
13719 * sizeof (struct type
*));
13721 make_cleanup (free_current_contents
, &range_types
);
13723 range_types
[ndim
++] = child_type
;
13726 child_die
= sibling_die (child_die
);
13729 /* Dwarf2 dimensions are output from left to right, create the
13730 necessary array types in backwards order. */
13732 type
= element_type
;
13734 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
13739 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
13745 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
13749 /* Understand Dwarf2 support for vector types (like they occur on
13750 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
13751 array type. This is not part of the Dwarf2/3 standard yet, but a
13752 custom vendor extension. The main difference between a regular
13753 array and the vector variant is that vectors are passed by value
13755 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
13757 make_vector_type (type
);
13759 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
13760 implementation may choose to implement triple vectors using this
13762 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13765 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
13766 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13768 complaint (&symfile_complaints
,
13769 _("DW_AT_byte_size for array type smaller "
13770 "than the total size of elements"));
13773 name
= dwarf2_name (die
, cu
);
13775 TYPE_NAME (type
) = name
;
13777 /* Install the type in the die. */
13778 set_die_type (die
, type
, cu
);
13780 /* set_die_type should be already done. */
13781 set_descriptive_type (type
, die
, cu
);
13783 do_cleanups (back_to
);
13788 static enum dwarf_array_dim_ordering
13789 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
13791 struct attribute
*attr
;
13793 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
13796 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
13798 /* GNU F77 is a special case, as at 08/2004 array type info is the
13799 opposite order to the dwarf2 specification, but data is still
13800 laid out as per normal fortran.
13802 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
13803 version checking. */
13805 if (cu
->language
== language_fortran
13806 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
13808 return DW_ORD_row_major
;
13811 switch (cu
->language_defn
->la_array_ordering
)
13813 case array_column_major
:
13814 return DW_ORD_col_major
;
13815 case array_row_major
:
13817 return DW_ORD_row_major
;
13821 /* Extract all information from a DW_TAG_set_type DIE and put it in
13822 the DIE's type field. */
13824 static struct type
*
13825 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13827 struct type
*domain_type
, *set_type
;
13828 struct attribute
*attr
;
13830 domain_type
= die_type (die
, cu
);
13832 /* The die_type call above may have already set the type for this DIE. */
13833 set_type
= get_die_type (die
, cu
);
13837 set_type
= create_set_type (NULL
, domain_type
);
13839 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13841 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
13843 return set_die_type (die
, set_type
, cu
);
13846 /* A helper for read_common_block that creates a locexpr baton.
13847 SYM is the symbol which we are marking as computed.
13848 COMMON_DIE is the DIE for the common block.
13849 COMMON_LOC is the location expression attribute for the common
13851 MEMBER_LOC is the location expression attribute for the particular
13852 member of the common block that we are processing.
13853 CU is the CU from which the above come. */
13856 mark_common_block_symbol_computed (struct symbol
*sym
,
13857 struct die_info
*common_die
,
13858 struct attribute
*common_loc
,
13859 struct attribute
*member_loc
,
13860 struct dwarf2_cu
*cu
)
13862 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13863 struct dwarf2_locexpr_baton
*baton
;
13865 unsigned int cu_off
;
13866 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
13867 LONGEST offset
= 0;
13869 gdb_assert (common_loc
&& member_loc
);
13870 gdb_assert (attr_form_is_block (common_loc
));
13871 gdb_assert (attr_form_is_block (member_loc
)
13872 || attr_form_is_constant (member_loc
));
13874 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
13875 baton
->per_cu
= cu
->per_cu
;
13876 gdb_assert (baton
->per_cu
);
13878 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
13880 if (attr_form_is_constant (member_loc
))
13882 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
13883 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
13886 baton
->size
+= DW_BLOCK (member_loc
)->size
;
13888 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
13891 *ptr
++ = DW_OP_call4
;
13892 cu_off
= common_die
->offset
.sect_off
- cu
->per_cu
->offset
.sect_off
;
13893 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
13896 if (attr_form_is_constant (member_loc
))
13898 *ptr
++ = DW_OP_addr
;
13899 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
13900 ptr
+= cu
->header
.addr_size
;
13904 /* We have to copy the data here, because DW_OP_call4 will only
13905 use a DW_AT_location attribute. */
13906 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
13907 ptr
+= DW_BLOCK (member_loc
)->size
;
13910 *ptr
++ = DW_OP_plus
;
13911 gdb_assert (ptr
- baton
->data
== baton
->size
);
13913 SYMBOL_LOCATION_BATON (sym
) = baton
;
13914 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
13917 /* Create appropriate locally-scoped variables for all the
13918 DW_TAG_common_block entries. Also create a struct common_block
13919 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
13920 is used to sepate the common blocks name namespace from regular
13924 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
13926 struct attribute
*attr
;
13928 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
13931 /* Support the .debug_loc offsets. */
13932 if (attr_form_is_block (attr
))
13936 else if (attr_form_is_section_offset (attr
))
13938 dwarf2_complex_location_expr_complaint ();
13943 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
13944 "common block member");
13949 if (die
->child
!= NULL
)
13951 struct objfile
*objfile
= cu
->objfile
;
13952 struct die_info
*child_die
;
13953 size_t n_entries
= 0, size
;
13954 struct common_block
*common_block
;
13955 struct symbol
*sym
;
13957 for (child_die
= die
->child
;
13958 child_die
&& child_die
->tag
;
13959 child_die
= sibling_die (child_die
))
13962 size
= (sizeof (struct common_block
)
13963 + (n_entries
- 1) * sizeof (struct symbol
*));
13965 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
13967 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
13968 common_block
->n_entries
= 0;
13970 for (child_die
= die
->child
;
13971 child_die
&& child_die
->tag
;
13972 child_die
= sibling_die (child_die
))
13974 /* Create the symbol in the DW_TAG_common_block block in the current
13976 sym
= new_symbol (child_die
, NULL
, cu
);
13979 struct attribute
*member_loc
;
13981 common_block
->contents
[common_block
->n_entries
++] = sym
;
13983 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
13987 /* GDB has handled this for a long time, but it is
13988 not specified by DWARF. It seems to have been
13989 emitted by gfortran at least as recently as:
13990 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
13991 complaint (&symfile_complaints
,
13992 _("Variable in common block has "
13993 "DW_AT_data_member_location "
13994 "- DIE at 0x%x [in module %s]"),
13995 child_die
->offset
.sect_off
,
13996 objfile_name (cu
->objfile
));
13998 if (attr_form_is_section_offset (member_loc
))
13999 dwarf2_complex_location_expr_complaint ();
14000 else if (attr_form_is_constant (member_loc
)
14001 || attr_form_is_block (member_loc
))
14004 mark_common_block_symbol_computed (sym
, die
, attr
,
14008 dwarf2_complex_location_expr_complaint ();
14013 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
14014 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
14018 /* Create a type for a C++ namespace. */
14020 static struct type
*
14021 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14023 struct objfile
*objfile
= cu
->objfile
;
14024 const char *previous_prefix
, *name
;
14028 /* For extensions, reuse the type of the original namespace. */
14029 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
14031 struct die_info
*ext_die
;
14032 struct dwarf2_cu
*ext_cu
= cu
;
14034 ext_die
= dwarf2_extension (die
, &ext_cu
);
14035 type
= read_type_die (ext_die
, ext_cu
);
14037 /* EXT_CU may not be the same as CU.
14038 Ensure TYPE is recorded with CU in die_type_hash. */
14039 return set_die_type (die
, type
, cu
);
14042 name
= namespace_name (die
, &is_anonymous
, cu
);
14044 /* Now build the name of the current namespace. */
14046 previous_prefix
= determine_prefix (die
, cu
);
14047 if (previous_prefix
[0] != '\0')
14048 name
= typename_concat (&objfile
->objfile_obstack
,
14049 previous_prefix
, name
, 0, cu
);
14051 /* Create the type. */
14052 type
= init_type (objfile
, TYPE_CODE_NAMESPACE
, 0, name
);
14053 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
14055 return set_die_type (die
, type
, cu
);
14058 /* Read a namespace scope. */
14061 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
14063 struct objfile
*objfile
= cu
->objfile
;
14066 /* Add a symbol associated to this if we haven't seen the namespace
14067 before. Also, add a using directive if it's an anonymous
14070 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
14074 type
= read_type_die (die
, cu
);
14075 new_symbol (die
, type
, cu
);
14077 namespace_name (die
, &is_anonymous
, cu
);
14080 const char *previous_prefix
= determine_prefix (die
, cu
);
14082 add_using_directive (using_directives (cu
->language
),
14083 previous_prefix
, TYPE_NAME (type
), NULL
,
14084 NULL
, NULL
, 0, &objfile
->objfile_obstack
);
14088 if (die
->child
!= NULL
)
14090 struct die_info
*child_die
= die
->child
;
14092 while (child_die
&& child_die
->tag
)
14094 process_die (child_die
, cu
);
14095 child_die
= sibling_die (child_die
);
14100 /* Read a Fortran module as type. This DIE can be only a declaration used for
14101 imported module. Still we need that type as local Fortran "use ... only"
14102 declaration imports depend on the created type in determine_prefix. */
14104 static struct type
*
14105 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14107 struct objfile
*objfile
= cu
->objfile
;
14108 const char *module_name
;
14111 module_name
= dwarf2_name (die
, cu
);
14113 complaint (&symfile_complaints
,
14114 _("DW_TAG_module has no name, offset 0x%x"),
14115 die
->offset
.sect_off
);
14116 type
= init_type (objfile
, TYPE_CODE_MODULE
, 0, module_name
);
14118 /* determine_prefix uses TYPE_TAG_NAME. */
14119 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
14121 return set_die_type (die
, type
, cu
);
14124 /* Read a Fortran module. */
14127 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
14129 struct die_info
*child_die
= die
->child
;
14132 type
= read_type_die (die
, cu
);
14133 new_symbol (die
, type
, cu
);
14135 while (child_die
&& child_die
->tag
)
14137 process_die (child_die
, cu
);
14138 child_die
= sibling_die (child_die
);
14142 /* Return the name of the namespace represented by DIE. Set
14143 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
14146 static const char *
14147 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
14149 struct die_info
*current_die
;
14150 const char *name
= NULL
;
14152 /* Loop through the extensions until we find a name. */
14154 for (current_die
= die
;
14155 current_die
!= NULL
;
14156 current_die
= dwarf2_extension (die
, &cu
))
14158 /* We don't use dwarf2_name here so that we can detect the absence
14159 of a name -> anonymous namespace. */
14160 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
14166 /* Is it an anonymous namespace? */
14168 *is_anonymous
= (name
== NULL
);
14170 name
= CP_ANONYMOUS_NAMESPACE_STR
;
14175 /* Extract all information from a DW_TAG_pointer_type DIE and add to
14176 the user defined type vector. */
14178 static struct type
*
14179 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14181 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
14182 struct comp_unit_head
*cu_header
= &cu
->header
;
14184 struct attribute
*attr_byte_size
;
14185 struct attribute
*attr_address_class
;
14186 int byte_size
, addr_class
;
14187 struct type
*target_type
;
14189 target_type
= die_type (die
, cu
);
14191 /* The die_type call above may have already set the type for this DIE. */
14192 type
= get_die_type (die
, cu
);
14196 type
= lookup_pointer_type (target_type
);
14198 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14199 if (attr_byte_size
)
14200 byte_size
= DW_UNSND (attr_byte_size
);
14202 byte_size
= cu_header
->addr_size
;
14204 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
14205 if (attr_address_class
)
14206 addr_class
= DW_UNSND (attr_address_class
);
14208 addr_class
= DW_ADDR_none
;
14210 /* If the pointer size or address class is different than the
14211 default, create a type variant marked as such and set the
14212 length accordingly. */
14213 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
14215 if (gdbarch_address_class_type_flags_p (gdbarch
))
14219 type_flags
= gdbarch_address_class_type_flags
14220 (gdbarch
, byte_size
, addr_class
);
14221 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
14223 type
= make_type_with_address_space (type
, type_flags
);
14225 else if (TYPE_LENGTH (type
) != byte_size
)
14227 complaint (&symfile_complaints
,
14228 _("invalid pointer size %d"), byte_size
);
14232 /* Should we also complain about unhandled address classes? */
14236 TYPE_LENGTH (type
) = byte_size
;
14237 return set_die_type (die
, type
, cu
);
14240 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
14241 the user defined type vector. */
14243 static struct type
*
14244 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14247 struct type
*to_type
;
14248 struct type
*domain
;
14250 to_type
= die_type (die
, cu
);
14251 domain
= die_containing_type (die
, cu
);
14253 /* The calls above may have already set the type for this DIE. */
14254 type
= get_die_type (die
, cu
);
14258 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
14259 type
= lookup_methodptr_type (to_type
);
14260 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
14262 struct type
*new_type
= alloc_type (cu
->objfile
);
14264 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
14265 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
14266 TYPE_VARARGS (to_type
));
14267 type
= lookup_methodptr_type (new_type
);
14270 type
= lookup_memberptr_type (to_type
, domain
);
14272 return set_die_type (die
, type
, cu
);
14275 /* Extract all information from a DW_TAG_reference_type DIE and add to
14276 the user defined type vector. */
14278 static struct type
*
14279 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14281 struct comp_unit_head
*cu_header
= &cu
->header
;
14282 struct type
*type
, *target_type
;
14283 struct attribute
*attr
;
14285 target_type
= die_type (die
, cu
);
14287 /* The die_type call above may have already set the type for this DIE. */
14288 type
= get_die_type (die
, cu
);
14292 type
= lookup_reference_type (target_type
);
14293 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14296 TYPE_LENGTH (type
) = DW_UNSND (attr
);
14300 TYPE_LENGTH (type
) = cu_header
->addr_size
;
14302 return set_die_type (die
, type
, cu
);
14305 /* Add the given cv-qualifiers to the element type of the array. GCC
14306 outputs DWARF type qualifiers that apply to an array, not the
14307 element type. But GDB relies on the array element type to carry
14308 the cv-qualifiers. This mimics section 6.7.3 of the C99
14311 static struct type
*
14312 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
14313 struct type
*base_type
, int cnst
, int voltl
)
14315 struct type
*el_type
, *inner_array
;
14317 base_type
= copy_type (base_type
);
14318 inner_array
= base_type
;
14320 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
14322 TYPE_TARGET_TYPE (inner_array
) =
14323 copy_type (TYPE_TARGET_TYPE (inner_array
));
14324 inner_array
= TYPE_TARGET_TYPE (inner_array
);
14327 el_type
= TYPE_TARGET_TYPE (inner_array
);
14328 cnst
|= TYPE_CONST (el_type
);
14329 voltl
|= TYPE_VOLATILE (el_type
);
14330 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
14332 return set_die_type (die
, base_type
, cu
);
14335 static struct type
*
14336 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14338 struct type
*base_type
, *cv_type
;
14340 base_type
= die_type (die
, cu
);
14342 /* The die_type call above may have already set the type for this DIE. */
14343 cv_type
= get_die_type (die
, cu
);
14347 /* In case the const qualifier is applied to an array type, the element type
14348 is so qualified, not the array type (section 6.7.3 of C99). */
14349 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14350 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
14352 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
14353 return set_die_type (die
, cv_type
, cu
);
14356 static struct type
*
14357 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14359 struct type
*base_type
, *cv_type
;
14361 base_type
= die_type (die
, cu
);
14363 /* The die_type call above may have already set the type for this DIE. */
14364 cv_type
= get_die_type (die
, cu
);
14368 /* In case the volatile qualifier is applied to an array type, the
14369 element type is so qualified, not the array type (section 6.7.3
14371 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14372 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
14374 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
14375 return set_die_type (die
, cv_type
, cu
);
14378 /* Handle DW_TAG_restrict_type. */
14380 static struct type
*
14381 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14383 struct type
*base_type
, *cv_type
;
14385 base_type
= die_type (die
, cu
);
14387 /* The die_type call above may have already set the type for this DIE. */
14388 cv_type
= get_die_type (die
, cu
);
14392 cv_type
= make_restrict_type (base_type
);
14393 return set_die_type (die
, cv_type
, cu
);
14396 /* Handle DW_TAG_atomic_type. */
14398 static struct type
*
14399 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14401 struct type
*base_type
, *cv_type
;
14403 base_type
= die_type (die
, cu
);
14405 /* The die_type call above may have already set the type for this DIE. */
14406 cv_type
= get_die_type (die
, cu
);
14410 cv_type
= make_atomic_type (base_type
);
14411 return set_die_type (die
, cv_type
, cu
);
14414 /* Extract all information from a DW_TAG_string_type DIE and add to
14415 the user defined type vector. It isn't really a user defined type,
14416 but it behaves like one, with other DIE's using an AT_user_def_type
14417 attribute to reference it. */
14419 static struct type
*
14420 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14422 struct objfile
*objfile
= cu
->objfile
;
14423 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14424 struct type
*type
, *range_type
, *index_type
, *char_type
;
14425 struct attribute
*attr
;
14426 unsigned int length
;
14428 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
14431 length
= DW_UNSND (attr
);
14435 /* Check for the DW_AT_byte_size attribute. */
14436 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14439 length
= DW_UNSND (attr
);
14447 index_type
= objfile_type (objfile
)->builtin_int
;
14448 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
14449 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
14450 type
= create_string_type (NULL
, char_type
, range_type
);
14452 return set_die_type (die
, type
, cu
);
14455 /* Assuming that DIE corresponds to a function, returns nonzero
14456 if the function is prototyped. */
14459 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
14461 struct attribute
*attr
;
14463 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
14464 if (attr
&& (DW_UNSND (attr
) != 0))
14467 /* The DWARF standard implies that the DW_AT_prototyped attribute
14468 is only meaninful for C, but the concept also extends to other
14469 languages that allow unprototyped functions (Eg: Objective C).
14470 For all other languages, assume that functions are always
14472 if (cu
->language
!= language_c
14473 && cu
->language
!= language_objc
14474 && cu
->language
!= language_opencl
)
14477 /* RealView does not emit DW_AT_prototyped. We can not distinguish
14478 prototyped and unprototyped functions; default to prototyped,
14479 since that is more common in modern code (and RealView warns
14480 about unprototyped functions). */
14481 if (producer_is_realview (cu
->producer
))
14487 /* Handle DIES due to C code like:
14491 int (*funcp)(int a, long l);
14495 ('funcp' generates a DW_TAG_subroutine_type DIE). */
14497 static struct type
*
14498 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14500 struct objfile
*objfile
= cu
->objfile
;
14501 struct type
*type
; /* Type that this function returns. */
14502 struct type
*ftype
; /* Function that returns above type. */
14503 struct attribute
*attr
;
14505 type
= die_type (die
, cu
);
14507 /* The die_type call above may have already set the type for this DIE. */
14508 ftype
= get_die_type (die
, cu
);
14512 ftype
= lookup_function_type (type
);
14514 if (prototyped_function_p (die
, cu
))
14515 TYPE_PROTOTYPED (ftype
) = 1;
14517 /* Store the calling convention in the type if it's available in
14518 the subroutine die. Otherwise set the calling convention to
14519 the default value DW_CC_normal. */
14520 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
14522 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
14523 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
14524 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
14526 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
14528 /* Record whether the function returns normally to its caller or not
14529 if the DWARF producer set that information. */
14530 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
14531 if (attr
&& (DW_UNSND (attr
) != 0))
14532 TYPE_NO_RETURN (ftype
) = 1;
14534 /* We need to add the subroutine type to the die immediately so
14535 we don't infinitely recurse when dealing with parameters
14536 declared as the same subroutine type. */
14537 set_die_type (die
, ftype
, cu
);
14539 if (die
->child
!= NULL
)
14541 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
14542 struct die_info
*child_die
;
14543 int nparams
, iparams
;
14545 /* Count the number of parameters.
14546 FIXME: GDB currently ignores vararg functions, but knows about
14547 vararg member functions. */
14549 child_die
= die
->child
;
14550 while (child_die
&& child_die
->tag
)
14552 if (child_die
->tag
== DW_TAG_formal_parameter
)
14554 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
14555 TYPE_VARARGS (ftype
) = 1;
14556 child_die
= sibling_die (child_die
);
14559 /* Allocate storage for parameters and fill them in. */
14560 TYPE_NFIELDS (ftype
) = nparams
;
14561 TYPE_FIELDS (ftype
) = (struct field
*)
14562 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
14564 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
14565 even if we error out during the parameters reading below. */
14566 for (iparams
= 0; iparams
< nparams
; iparams
++)
14567 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
14570 child_die
= die
->child
;
14571 while (child_die
&& child_die
->tag
)
14573 if (child_die
->tag
== DW_TAG_formal_parameter
)
14575 struct type
*arg_type
;
14577 /* DWARF version 2 has no clean way to discern C++
14578 static and non-static member functions. G++ helps
14579 GDB by marking the first parameter for non-static
14580 member functions (which is the this pointer) as
14581 artificial. We pass this information to
14582 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
14584 DWARF version 3 added DW_AT_object_pointer, which GCC
14585 4.5 does not yet generate. */
14586 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
14588 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
14590 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
14591 arg_type
= die_type (child_die
, cu
);
14593 /* RealView does not mark THIS as const, which the testsuite
14594 expects. GCC marks THIS as const in method definitions,
14595 but not in the class specifications (GCC PR 43053). */
14596 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
14597 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
14600 struct dwarf2_cu
*arg_cu
= cu
;
14601 const char *name
= dwarf2_name (child_die
, cu
);
14603 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
14606 /* If the compiler emits this, use it. */
14607 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
14610 else if (name
&& strcmp (name
, "this") == 0)
14611 /* Function definitions will have the argument names. */
14613 else if (name
== NULL
&& iparams
== 0)
14614 /* Declarations may not have the names, so like
14615 elsewhere in GDB, assume an artificial first
14616 argument is "this". */
14620 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
14624 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
14627 child_die
= sibling_die (child_die
);
14634 static struct type
*
14635 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
14637 struct objfile
*objfile
= cu
->objfile
;
14638 const char *name
= NULL
;
14639 struct type
*this_type
, *target_type
;
14641 name
= dwarf2_full_name (NULL
, die
, cu
);
14642 this_type
= init_type (objfile
, TYPE_CODE_TYPEDEF
, 0, name
);
14643 TYPE_TARGET_STUB (this_type
) = 1;
14644 set_die_type (die
, this_type
, cu
);
14645 target_type
= die_type (die
, cu
);
14646 if (target_type
!= this_type
)
14647 TYPE_TARGET_TYPE (this_type
) = target_type
;
14650 /* Self-referential typedefs are, it seems, not allowed by the DWARF
14651 spec and cause infinite loops in GDB. */
14652 complaint (&symfile_complaints
,
14653 _("Self-referential DW_TAG_typedef "
14654 "- DIE at 0x%x [in module %s]"),
14655 die
->offset
.sect_off
, objfile_name (objfile
));
14656 TYPE_TARGET_TYPE (this_type
) = NULL
;
14661 /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT
14662 (which may be different from NAME) to the architecture back-end to allow
14663 it to guess the correct format if necessary. */
14665 static struct type
*
14666 dwarf2_init_float_type (struct objfile
*objfile
, int bits
, const char *name
,
14667 const char *name_hint
)
14669 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14670 const struct floatformat
**format
;
14673 format
= gdbarch_floatformat_for_type (gdbarch
, name_hint
, bits
);
14675 type
= init_float_type (objfile
, bits
, name
, format
);
14677 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
/ TARGET_CHAR_BIT
, name
);
14682 /* Find a representation of a given base type and install
14683 it in the TYPE field of the die. */
14685 static struct type
*
14686 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14688 struct objfile
*objfile
= cu
->objfile
;
14690 struct attribute
*attr
;
14691 int encoding
= 0, bits
= 0;
14694 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
14697 encoding
= DW_UNSND (attr
);
14699 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14702 bits
= DW_UNSND (attr
) * TARGET_CHAR_BIT
;
14704 name
= dwarf2_name (die
, cu
);
14707 complaint (&symfile_complaints
,
14708 _("DW_AT_name missing from DW_TAG_base_type"));
14713 case DW_ATE_address
:
14714 /* Turn DW_ATE_address into a void * pointer. */
14715 type
= init_type (objfile
, TYPE_CODE_VOID
, 1, NULL
);
14716 type
= init_pointer_type (objfile
, bits
, name
, type
);
14718 case DW_ATE_boolean
:
14719 type
= init_boolean_type (objfile
, bits
, 1, name
);
14721 case DW_ATE_complex_float
:
14722 type
= dwarf2_init_float_type (objfile
, bits
/ 2, NULL
, name
);
14723 type
= init_complex_type (objfile
, name
, type
);
14725 case DW_ATE_decimal_float
:
14726 type
= init_decfloat_type (objfile
, bits
, name
);
14729 type
= dwarf2_init_float_type (objfile
, bits
, name
, name
);
14731 case DW_ATE_signed
:
14732 type
= init_integer_type (objfile
, bits
, 0, name
);
14734 case DW_ATE_unsigned
:
14735 if (cu
->language
== language_fortran
14737 && startswith (name
, "character("))
14738 type
= init_character_type (objfile
, bits
, 1, name
);
14740 type
= init_integer_type (objfile
, bits
, 1, name
);
14742 case DW_ATE_signed_char
:
14743 if (cu
->language
== language_ada
|| cu
->language
== language_m2
14744 || cu
->language
== language_pascal
14745 || cu
->language
== language_fortran
)
14746 type
= init_character_type (objfile
, bits
, 0, name
);
14748 type
= init_integer_type (objfile
, bits
, 0, name
);
14750 case DW_ATE_unsigned_char
:
14751 if (cu
->language
== language_ada
|| cu
->language
== language_m2
14752 || cu
->language
== language_pascal
14753 || cu
->language
== language_fortran
14754 || cu
->language
== language_rust
)
14755 type
= init_character_type (objfile
, bits
, 1, name
);
14757 type
= init_integer_type (objfile
, bits
, 1, name
);
14760 /* We just treat this as an integer and then recognize the
14761 type by name elsewhere. */
14762 type
= init_integer_type (objfile
, bits
, 0, name
);
14766 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
14767 dwarf_type_encoding_name (encoding
));
14768 type
= init_type (objfile
, TYPE_CODE_ERROR
,
14769 bits
/ TARGET_CHAR_BIT
, name
);
14773 if (name
&& strcmp (name
, "char") == 0)
14774 TYPE_NOSIGN (type
) = 1;
14776 return set_die_type (die
, type
, cu
);
14779 /* Parse dwarf attribute if it's a block, reference or constant and put the
14780 resulting value of the attribute into struct bound_prop.
14781 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
14784 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
14785 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
)
14787 struct dwarf2_property_baton
*baton
;
14788 struct obstack
*obstack
= &cu
->objfile
->objfile_obstack
;
14790 if (attr
== NULL
|| prop
== NULL
)
14793 if (attr_form_is_block (attr
))
14795 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
14796 baton
->referenced_type
= NULL
;
14797 baton
->locexpr
.per_cu
= cu
->per_cu
;
14798 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
14799 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
14800 prop
->data
.baton
= baton
;
14801 prop
->kind
= PROP_LOCEXPR
;
14802 gdb_assert (prop
->data
.baton
!= NULL
);
14804 else if (attr_form_is_ref (attr
))
14806 struct dwarf2_cu
*target_cu
= cu
;
14807 struct die_info
*target_die
;
14808 struct attribute
*target_attr
;
14810 target_die
= follow_die_ref (die
, attr
, &target_cu
);
14811 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
14812 if (target_attr
== NULL
)
14813 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
14815 if (target_attr
== NULL
)
14818 switch (target_attr
->name
)
14820 case DW_AT_location
:
14821 if (attr_form_is_section_offset (target_attr
))
14823 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
14824 baton
->referenced_type
= die_type (target_die
, target_cu
);
14825 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
14826 prop
->data
.baton
= baton
;
14827 prop
->kind
= PROP_LOCLIST
;
14828 gdb_assert (prop
->data
.baton
!= NULL
);
14830 else if (attr_form_is_block (target_attr
))
14832 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
14833 baton
->referenced_type
= die_type (target_die
, target_cu
);
14834 baton
->locexpr
.per_cu
= cu
->per_cu
;
14835 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
14836 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
14837 prop
->data
.baton
= baton
;
14838 prop
->kind
= PROP_LOCEXPR
;
14839 gdb_assert (prop
->data
.baton
!= NULL
);
14843 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
14844 "dynamic property");
14848 case DW_AT_data_member_location
:
14852 if (!handle_data_member_location (target_die
, target_cu
,
14856 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
14857 baton
->referenced_type
= read_type_die (target_die
->parent
,
14859 baton
->offset_info
.offset
= offset
;
14860 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
14861 prop
->data
.baton
= baton
;
14862 prop
->kind
= PROP_ADDR_OFFSET
;
14867 else if (attr_form_is_constant (attr
))
14869 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
14870 prop
->kind
= PROP_CONST
;
14874 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
14875 dwarf2_name (die
, cu
));
14882 /* Read the given DW_AT_subrange DIE. */
14884 static struct type
*
14885 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14887 struct type
*base_type
, *orig_base_type
;
14888 struct type
*range_type
;
14889 struct attribute
*attr
;
14890 struct dynamic_prop low
, high
;
14891 int low_default_is_valid
;
14892 int high_bound_is_count
= 0;
14894 LONGEST negative_mask
;
14896 orig_base_type
= die_type (die
, cu
);
14897 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
14898 whereas the real type might be. So, we use ORIG_BASE_TYPE when
14899 creating the range type, but we use the result of check_typedef
14900 when examining properties of the type. */
14901 base_type
= check_typedef (orig_base_type
);
14903 /* The die_type call above may have already set the type for this DIE. */
14904 range_type
= get_die_type (die
, cu
);
14908 low
.kind
= PROP_CONST
;
14909 high
.kind
= PROP_CONST
;
14910 high
.data
.const_val
= 0;
14912 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
14913 omitting DW_AT_lower_bound. */
14914 switch (cu
->language
)
14917 case language_cplus
:
14918 low
.data
.const_val
= 0;
14919 low_default_is_valid
= 1;
14921 case language_fortran
:
14922 low
.data
.const_val
= 1;
14923 low_default_is_valid
= 1;
14926 case language_objc
:
14927 case language_rust
:
14928 low
.data
.const_val
= 0;
14929 low_default_is_valid
= (cu
->header
.version
>= 4);
14933 case language_pascal
:
14934 low
.data
.const_val
= 1;
14935 low_default_is_valid
= (cu
->header
.version
>= 4);
14938 low
.data
.const_val
= 0;
14939 low_default_is_valid
= 0;
14943 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
14945 attr_to_dynamic_prop (attr
, die
, cu
, &low
);
14946 else if (!low_default_is_valid
)
14947 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
14948 "- DIE at 0x%x [in module %s]"),
14949 die
->offset
.sect_off
, objfile_name (cu
->objfile
));
14951 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
14952 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
))
14954 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
14955 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
))
14957 /* If bounds are constant do the final calculation here. */
14958 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
14959 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
14961 high_bound_is_count
= 1;
14965 /* Dwarf-2 specifications explicitly allows to create subrange types
14966 without specifying a base type.
14967 In that case, the base type must be set to the type of
14968 the lower bound, upper bound or count, in that order, if any of these
14969 three attributes references an object that has a type.
14970 If no base type is found, the Dwarf-2 specifications say that
14971 a signed integer type of size equal to the size of an address should
14973 For the following C code: `extern char gdb_int [];'
14974 GCC produces an empty range DIE.
14975 FIXME: muller/2010-05-28: Possible references to object for low bound,
14976 high bound or count are not yet handled by this code. */
14977 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
14979 struct objfile
*objfile
= cu
->objfile
;
14980 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14981 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
14982 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
14984 /* Test "int", "long int", and "long long int" objfile types,
14985 and select the first one having a size above or equal to the
14986 architecture address size. */
14987 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
14988 base_type
= int_type
;
14991 int_type
= objfile_type (objfile
)->builtin_long
;
14992 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
14993 base_type
= int_type
;
14996 int_type
= objfile_type (objfile
)->builtin_long_long
;
14997 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
14998 base_type
= int_type
;
15003 /* Normally, the DWARF producers are expected to use a signed
15004 constant form (Eg. DW_FORM_sdata) to express negative bounds.
15005 But this is unfortunately not always the case, as witnessed
15006 with GCC, for instance, where the ambiguous DW_FORM_dataN form
15007 is used instead. To work around that ambiguity, we treat
15008 the bounds as signed, and thus sign-extend their values, when
15009 the base type is signed. */
15011 -((LONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
15012 if (low
.kind
== PROP_CONST
15013 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
15014 low
.data
.const_val
|= negative_mask
;
15015 if (high
.kind
== PROP_CONST
15016 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
15017 high
.data
.const_val
|= negative_mask
;
15019 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
);
15021 if (high_bound_is_count
)
15022 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
15024 /* Ada expects an empty array on no boundary attributes. */
15025 if (attr
== NULL
&& cu
->language
!= language_ada
)
15026 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
15028 name
= dwarf2_name (die
, cu
);
15030 TYPE_NAME (range_type
) = name
;
15032 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15034 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
15036 set_die_type (die
, range_type
, cu
);
15038 /* set_die_type should be already done. */
15039 set_descriptive_type (range_type
, die
, cu
);
15044 static struct type
*
15045 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15049 /* For now, we only support the C meaning of an unspecified type: void. */
15051 type
= init_type (cu
->objfile
, TYPE_CODE_VOID
, 0, NULL
);
15052 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
15054 return set_die_type (die
, type
, cu
);
15057 /* Read a single die and all its descendents. Set the die's sibling
15058 field to NULL; set other fields in the die correctly, and set all
15059 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
15060 location of the info_ptr after reading all of those dies. PARENT
15061 is the parent of the die in question. */
15063 static struct die_info
*
15064 read_die_and_children (const struct die_reader_specs
*reader
,
15065 const gdb_byte
*info_ptr
,
15066 const gdb_byte
**new_info_ptr
,
15067 struct die_info
*parent
)
15069 struct die_info
*die
;
15070 const gdb_byte
*cur_ptr
;
15073 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
15076 *new_info_ptr
= cur_ptr
;
15079 store_in_ref_table (die
, reader
->cu
);
15082 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
15086 *new_info_ptr
= cur_ptr
;
15089 die
->sibling
= NULL
;
15090 die
->parent
= parent
;
15094 /* Read a die, all of its descendents, and all of its siblings; set
15095 all of the fields of all of the dies correctly. Arguments are as
15096 in read_die_and_children. */
15098 static struct die_info
*
15099 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
15100 const gdb_byte
*info_ptr
,
15101 const gdb_byte
**new_info_ptr
,
15102 struct die_info
*parent
)
15104 struct die_info
*first_die
, *last_sibling
;
15105 const gdb_byte
*cur_ptr
;
15107 cur_ptr
= info_ptr
;
15108 first_die
= last_sibling
= NULL
;
15112 struct die_info
*die
15113 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
15117 *new_info_ptr
= cur_ptr
;
15124 last_sibling
->sibling
= die
;
15126 last_sibling
= die
;
15130 /* Read a die, all of its descendents, and all of its siblings; set
15131 all of the fields of all of the dies correctly. Arguments are as
15132 in read_die_and_children.
15133 This the main entry point for reading a DIE and all its children. */
15135 static struct die_info
*
15136 read_die_and_siblings (const struct die_reader_specs
*reader
,
15137 const gdb_byte
*info_ptr
,
15138 const gdb_byte
**new_info_ptr
,
15139 struct die_info
*parent
)
15141 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
15142 new_info_ptr
, parent
);
15144 if (dwarf_die_debug
)
15146 fprintf_unfiltered (gdb_stdlog
,
15147 "Read die from %s@0x%x of %s:\n",
15148 get_section_name (reader
->die_section
),
15149 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
15150 bfd_get_filename (reader
->abfd
));
15151 dump_die (die
, dwarf_die_debug
);
15157 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
15159 The caller is responsible for filling in the extra attributes
15160 and updating (*DIEP)->num_attrs.
15161 Set DIEP to point to a newly allocated die with its information,
15162 except for its child, sibling, and parent fields.
15163 Set HAS_CHILDREN to tell whether the die has children or not. */
15165 static const gdb_byte
*
15166 read_full_die_1 (const struct die_reader_specs
*reader
,
15167 struct die_info
**diep
, const gdb_byte
*info_ptr
,
15168 int *has_children
, int num_extra_attrs
)
15170 unsigned int abbrev_number
, bytes_read
, i
;
15171 sect_offset offset
;
15172 struct abbrev_info
*abbrev
;
15173 struct die_info
*die
;
15174 struct dwarf2_cu
*cu
= reader
->cu
;
15175 bfd
*abfd
= reader
->abfd
;
15177 offset
.sect_off
= info_ptr
- reader
->buffer
;
15178 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
15179 info_ptr
+= bytes_read
;
15180 if (!abbrev_number
)
15187 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
15189 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
15191 bfd_get_filename (abfd
));
15193 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
15194 die
->offset
= offset
;
15195 die
->tag
= abbrev
->tag
;
15196 die
->abbrev
= abbrev_number
;
15198 /* Make the result usable.
15199 The caller needs to update num_attrs after adding the extra
15201 die
->num_attrs
= abbrev
->num_attrs
;
15203 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
15204 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
15208 *has_children
= abbrev
->has_children
;
15212 /* Read a die and all its attributes.
15213 Set DIEP to point to a newly allocated die with its information,
15214 except for its child, sibling, and parent fields.
15215 Set HAS_CHILDREN to tell whether the die has children or not. */
15217 static const gdb_byte
*
15218 read_full_die (const struct die_reader_specs
*reader
,
15219 struct die_info
**diep
, const gdb_byte
*info_ptr
,
15222 const gdb_byte
*result
;
15224 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
15226 if (dwarf_die_debug
)
15228 fprintf_unfiltered (gdb_stdlog
,
15229 "Read die from %s@0x%x of %s:\n",
15230 get_section_name (reader
->die_section
),
15231 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
15232 bfd_get_filename (reader
->abfd
));
15233 dump_die (*diep
, dwarf_die_debug
);
15239 /* Abbreviation tables.
15241 In DWARF version 2, the description of the debugging information is
15242 stored in a separate .debug_abbrev section. Before we read any
15243 dies from a section we read in all abbreviations and install them
15244 in a hash table. */
15246 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
15248 static struct abbrev_info
*
15249 abbrev_table_alloc_abbrev (struct abbrev_table
*abbrev_table
)
15251 struct abbrev_info
*abbrev
;
15253 abbrev
= XOBNEW (&abbrev_table
->abbrev_obstack
, struct abbrev_info
);
15254 memset (abbrev
, 0, sizeof (struct abbrev_info
));
15259 /* Add an abbreviation to the table. */
15262 abbrev_table_add_abbrev (struct abbrev_table
*abbrev_table
,
15263 unsigned int abbrev_number
,
15264 struct abbrev_info
*abbrev
)
15266 unsigned int hash_number
;
15268 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15269 abbrev
->next
= abbrev_table
->abbrevs
[hash_number
];
15270 abbrev_table
->abbrevs
[hash_number
] = abbrev
;
15273 /* Look up an abbrev in the table.
15274 Returns NULL if the abbrev is not found. */
15276 static struct abbrev_info
*
15277 abbrev_table_lookup_abbrev (const struct abbrev_table
*abbrev_table
,
15278 unsigned int abbrev_number
)
15280 unsigned int hash_number
;
15281 struct abbrev_info
*abbrev
;
15283 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15284 abbrev
= abbrev_table
->abbrevs
[hash_number
];
15288 if (abbrev
->number
== abbrev_number
)
15290 abbrev
= abbrev
->next
;
15295 /* Read in an abbrev table. */
15297 static struct abbrev_table
*
15298 abbrev_table_read_table (struct dwarf2_section_info
*section
,
15299 sect_offset offset
)
15301 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
15302 bfd
*abfd
= get_section_bfd_owner (section
);
15303 struct abbrev_table
*abbrev_table
;
15304 const gdb_byte
*abbrev_ptr
;
15305 struct abbrev_info
*cur_abbrev
;
15306 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
15307 unsigned int abbrev_form
;
15308 struct attr_abbrev
*cur_attrs
;
15309 unsigned int allocated_attrs
;
15311 abbrev_table
= XNEW (struct abbrev_table
);
15312 abbrev_table
->offset
= offset
;
15313 obstack_init (&abbrev_table
->abbrev_obstack
);
15314 abbrev_table
->abbrevs
=
15315 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct abbrev_info
*,
15317 memset (abbrev_table
->abbrevs
, 0,
15318 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
15320 dwarf2_read_section (objfile
, section
);
15321 abbrev_ptr
= section
->buffer
+ offset
.sect_off
;
15322 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15323 abbrev_ptr
+= bytes_read
;
15325 allocated_attrs
= ATTR_ALLOC_CHUNK
;
15326 cur_attrs
= XNEWVEC (struct attr_abbrev
, allocated_attrs
);
15328 /* Loop until we reach an abbrev number of 0. */
15329 while (abbrev_number
)
15331 cur_abbrev
= abbrev_table_alloc_abbrev (abbrev_table
);
15333 /* read in abbrev header */
15334 cur_abbrev
->number
= abbrev_number
;
15336 = (enum dwarf_tag
) read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15337 abbrev_ptr
+= bytes_read
;
15338 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
15341 /* now read in declarations */
15342 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15343 abbrev_ptr
+= bytes_read
;
15344 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15345 abbrev_ptr
+= bytes_read
;
15346 while (abbrev_name
)
15348 if (cur_abbrev
->num_attrs
== allocated_attrs
)
15350 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
15352 = XRESIZEVEC (struct attr_abbrev
, cur_attrs
, allocated_attrs
);
15355 cur_attrs
[cur_abbrev
->num_attrs
].name
15356 = (enum dwarf_attribute
) abbrev_name
;
15357 cur_attrs
[cur_abbrev
->num_attrs
++].form
15358 = (enum dwarf_form
) abbrev_form
;
15359 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15360 abbrev_ptr
+= bytes_read
;
15361 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15362 abbrev_ptr
+= bytes_read
;
15365 cur_abbrev
->attrs
=
15366 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct attr_abbrev
,
15367 cur_abbrev
->num_attrs
);
15368 memcpy (cur_abbrev
->attrs
, cur_attrs
,
15369 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
15371 abbrev_table_add_abbrev (abbrev_table
, abbrev_number
, cur_abbrev
);
15373 /* Get next abbreviation.
15374 Under Irix6 the abbreviations for a compilation unit are not
15375 always properly terminated with an abbrev number of 0.
15376 Exit loop if we encounter an abbreviation which we have
15377 already read (which means we are about to read the abbreviations
15378 for the next compile unit) or if the end of the abbreviation
15379 table is reached. */
15380 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
15382 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15383 abbrev_ptr
+= bytes_read
;
15384 if (abbrev_table_lookup_abbrev (abbrev_table
, abbrev_number
) != NULL
)
15389 return abbrev_table
;
15392 /* Free the resources held by ABBREV_TABLE. */
15395 abbrev_table_free (struct abbrev_table
*abbrev_table
)
15397 obstack_free (&abbrev_table
->abbrev_obstack
, NULL
);
15398 xfree (abbrev_table
);
15401 /* Same as abbrev_table_free but as a cleanup.
15402 We pass in a pointer to the pointer to the table so that we can
15403 set the pointer to NULL when we're done. It also simplifies
15404 build_type_psymtabs_1. */
15407 abbrev_table_free_cleanup (void *table_ptr
)
15409 struct abbrev_table
**abbrev_table_ptr
= (struct abbrev_table
**) table_ptr
;
15411 if (*abbrev_table_ptr
!= NULL
)
15412 abbrev_table_free (*abbrev_table_ptr
);
15413 *abbrev_table_ptr
= NULL
;
15416 /* Read the abbrev table for CU from ABBREV_SECTION. */
15419 dwarf2_read_abbrevs (struct dwarf2_cu
*cu
,
15420 struct dwarf2_section_info
*abbrev_section
)
15423 abbrev_table_read_table (abbrev_section
, cu
->header
.abbrev_offset
);
15426 /* Release the memory used by the abbrev table for a compilation unit. */
15429 dwarf2_free_abbrev_table (void *ptr_to_cu
)
15431 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr_to_cu
;
15433 if (cu
->abbrev_table
!= NULL
)
15434 abbrev_table_free (cu
->abbrev_table
);
15435 /* Set this to NULL so that we SEGV if we try to read it later,
15436 and also because free_comp_unit verifies this is NULL. */
15437 cu
->abbrev_table
= NULL
;
15440 /* Returns nonzero if TAG represents a type that we might generate a partial
15444 is_type_tag_for_partial (int tag
)
15449 /* Some types that would be reasonable to generate partial symbols for,
15450 that we don't at present. */
15451 case DW_TAG_array_type
:
15452 case DW_TAG_file_type
:
15453 case DW_TAG_ptr_to_member_type
:
15454 case DW_TAG_set_type
:
15455 case DW_TAG_string_type
:
15456 case DW_TAG_subroutine_type
:
15458 case DW_TAG_base_type
:
15459 case DW_TAG_class_type
:
15460 case DW_TAG_interface_type
:
15461 case DW_TAG_enumeration_type
:
15462 case DW_TAG_structure_type
:
15463 case DW_TAG_subrange_type
:
15464 case DW_TAG_typedef
:
15465 case DW_TAG_union_type
:
15472 /* Load all DIEs that are interesting for partial symbols into memory. */
15474 static struct partial_die_info
*
15475 load_partial_dies (const struct die_reader_specs
*reader
,
15476 const gdb_byte
*info_ptr
, int building_psymtab
)
15478 struct dwarf2_cu
*cu
= reader
->cu
;
15479 struct objfile
*objfile
= cu
->objfile
;
15480 struct partial_die_info
*part_die
;
15481 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
15482 struct abbrev_info
*abbrev
;
15483 unsigned int bytes_read
;
15484 unsigned int load_all
= 0;
15485 int nesting_level
= 1;
15490 gdb_assert (cu
->per_cu
!= NULL
);
15491 if (cu
->per_cu
->load_all_dies
)
15495 = htab_create_alloc_ex (cu
->header
.length
/ 12,
15499 &cu
->comp_unit_obstack
,
15500 hashtab_obstack_allocate
,
15501 dummy_obstack_deallocate
);
15503 part_die
= XOBNEW (&cu
->comp_unit_obstack
, struct partial_die_info
);
15507 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
15509 /* A NULL abbrev means the end of a series of children. */
15510 if (abbrev
== NULL
)
15512 if (--nesting_level
== 0)
15514 /* PART_DIE was probably the last thing allocated on the
15515 comp_unit_obstack, so we could call obstack_free
15516 here. We don't do that because the waste is small,
15517 and will be cleaned up when we're done with this
15518 compilation unit. This way, we're also more robust
15519 against other users of the comp_unit_obstack. */
15522 info_ptr
+= bytes_read
;
15523 last_die
= parent_die
;
15524 parent_die
= parent_die
->die_parent
;
15528 /* Check for template arguments. We never save these; if
15529 they're seen, we just mark the parent, and go on our way. */
15530 if (parent_die
!= NULL
15531 && cu
->language
== language_cplus
15532 && (abbrev
->tag
== DW_TAG_template_type_param
15533 || abbrev
->tag
== DW_TAG_template_value_param
))
15535 parent_die
->has_template_arguments
= 1;
15539 /* We don't need a partial DIE for the template argument. */
15540 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15545 /* We only recurse into c++ subprograms looking for template arguments.
15546 Skip their other children. */
15548 && cu
->language
== language_cplus
15549 && parent_die
!= NULL
15550 && parent_die
->tag
== DW_TAG_subprogram
)
15552 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15556 /* Check whether this DIE is interesting enough to save. Normally
15557 we would not be interested in members here, but there may be
15558 later variables referencing them via DW_AT_specification (for
15559 static members). */
15561 && !is_type_tag_for_partial (abbrev
->tag
)
15562 && abbrev
->tag
!= DW_TAG_constant
15563 && abbrev
->tag
!= DW_TAG_enumerator
15564 && abbrev
->tag
!= DW_TAG_subprogram
15565 && abbrev
->tag
!= DW_TAG_lexical_block
15566 && abbrev
->tag
!= DW_TAG_variable
15567 && abbrev
->tag
!= DW_TAG_namespace
15568 && abbrev
->tag
!= DW_TAG_module
15569 && abbrev
->tag
!= DW_TAG_member
15570 && abbrev
->tag
!= DW_TAG_imported_unit
15571 && abbrev
->tag
!= DW_TAG_imported_declaration
)
15573 /* Otherwise we skip to the next sibling, if any. */
15574 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15578 info_ptr
= read_partial_die (reader
, part_die
, abbrev
, bytes_read
,
15581 /* This two-pass algorithm for processing partial symbols has a
15582 high cost in cache pressure. Thus, handle some simple cases
15583 here which cover the majority of C partial symbols. DIEs
15584 which neither have specification tags in them, nor could have
15585 specification tags elsewhere pointing at them, can simply be
15586 processed and discarded.
15588 This segment is also optional; scan_partial_symbols and
15589 add_partial_symbol will handle these DIEs if we chain
15590 them in normally. When compilers which do not emit large
15591 quantities of duplicate debug information are more common,
15592 this code can probably be removed. */
15594 /* Any complete simple types at the top level (pretty much all
15595 of them, for a language without namespaces), can be processed
15597 if (parent_die
== NULL
15598 && part_die
->has_specification
== 0
15599 && part_die
->is_declaration
== 0
15600 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
15601 || part_die
->tag
== DW_TAG_base_type
15602 || part_die
->tag
== DW_TAG_subrange_type
))
15604 if (building_psymtab
&& part_die
->name
!= NULL
)
15605 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
15606 VAR_DOMAIN
, LOC_TYPEDEF
,
15607 &objfile
->static_psymbols
,
15608 0, cu
->language
, objfile
);
15609 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
15613 /* The exception for DW_TAG_typedef with has_children above is
15614 a workaround of GCC PR debug/47510. In the case of this complaint
15615 type_name_no_tag_or_error will error on such types later.
15617 GDB skipped children of DW_TAG_typedef by the shortcut above and then
15618 it could not find the child DIEs referenced later, this is checked
15619 above. In correct DWARF DW_TAG_typedef should have no children. */
15621 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
15622 complaint (&symfile_complaints
,
15623 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
15624 "- DIE at 0x%x [in module %s]"),
15625 part_die
->offset
.sect_off
, objfile_name (objfile
));
15627 /* If we're at the second level, and we're an enumerator, and
15628 our parent has no specification (meaning possibly lives in a
15629 namespace elsewhere), then we can add the partial symbol now
15630 instead of queueing it. */
15631 if (part_die
->tag
== DW_TAG_enumerator
15632 && parent_die
!= NULL
15633 && parent_die
->die_parent
== NULL
15634 && parent_die
->tag
== DW_TAG_enumeration_type
15635 && parent_die
->has_specification
== 0)
15637 if (part_die
->name
== NULL
)
15638 complaint (&symfile_complaints
,
15639 _("malformed enumerator DIE ignored"));
15640 else if (building_psymtab
)
15641 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
15642 VAR_DOMAIN
, LOC_CONST
,
15643 cu
->language
== language_cplus
15644 ? &objfile
->global_psymbols
15645 : &objfile
->static_psymbols
,
15646 0, cu
->language
, objfile
);
15648 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
15652 /* We'll save this DIE so link it in. */
15653 part_die
->die_parent
= parent_die
;
15654 part_die
->die_sibling
= NULL
;
15655 part_die
->die_child
= NULL
;
15657 if (last_die
&& last_die
== parent_die
)
15658 last_die
->die_child
= part_die
;
15660 last_die
->die_sibling
= part_die
;
15662 last_die
= part_die
;
15664 if (first_die
== NULL
)
15665 first_die
= part_die
;
15667 /* Maybe add the DIE to the hash table. Not all DIEs that we
15668 find interesting need to be in the hash table, because we
15669 also have the parent/sibling/child chains; only those that we
15670 might refer to by offset later during partial symbol reading.
15672 For now this means things that might have be the target of a
15673 DW_AT_specification, DW_AT_abstract_origin, or
15674 DW_AT_extension. DW_AT_extension will refer only to
15675 namespaces; DW_AT_abstract_origin refers to functions (and
15676 many things under the function DIE, but we do not recurse
15677 into function DIEs during partial symbol reading) and
15678 possibly variables as well; DW_AT_specification refers to
15679 declarations. Declarations ought to have the DW_AT_declaration
15680 flag. It happens that GCC forgets to put it in sometimes, but
15681 only for functions, not for types.
15683 Adding more things than necessary to the hash table is harmless
15684 except for the performance cost. Adding too few will result in
15685 wasted time in find_partial_die, when we reread the compilation
15686 unit with load_all_dies set. */
15689 || abbrev
->tag
== DW_TAG_constant
15690 || abbrev
->tag
== DW_TAG_subprogram
15691 || abbrev
->tag
== DW_TAG_variable
15692 || abbrev
->tag
== DW_TAG_namespace
15693 || part_die
->is_declaration
)
15697 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
15698 part_die
->offset
.sect_off
, INSERT
);
15702 part_die
= XOBNEW (&cu
->comp_unit_obstack
, struct partial_die_info
);
15704 /* For some DIEs we want to follow their children (if any). For C
15705 we have no reason to follow the children of structures; for other
15706 languages we have to, so that we can get at method physnames
15707 to infer fully qualified class names, for DW_AT_specification,
15708 and for C++ template arguments. For C++, we also look one level
15709 inside functions to find template arguments (if the name of the
15710 function does not already contain the template arguments).
15712 For Ada, we need to scan the children of subprograms and lexical
15713 blocks as well because Ada allows the definition of nested
15714 entities that could be interesting for the debugger, such as
15715 nested subprograms for instance. */
15716 if (last_die
->has_children
15718 || last_die
->tag
== DW_TAG_namespace
15719 || last_die
->tag
== DW_TAG_module
15720 || last_die
->tag
== DW_TAG_enumeration_type
15721 || (cu
->language
== language_cplus
15722 && last_die
->tag
== DW_TAG_subprogram
15723 && (last_die
->name
== NULL
15724 || strchr (last_die
->name
, '<') == NULL
))
15725 || (cu
->language
!= language_c
15726 && (last_die
->tag
== DW_TAG_class_type
15727 || last_die
->tag
== DW_TAG_interface_type
15728 || last_die
->tag
== DW_TAG_structure_type
15729 || last_die
->tag
== DW_TAG_union_type
))
15730 || (cu
->language
== language_ada
15731 && (last_die
->tag
== DW_TAG_subprogram
15732 || last_die
->tag
== DW_TAG_lexical_block
))))
15735 parent_die
= last_die
;
15739 /* Otherwise we skip to the next sibling, if any. */
15740 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
15742 /* Back to the top, do it again. */
15746 /* Read a minimal amount of information into the minimal die structure. */
15748 static const gdb_byte
*
15749 read_partial_die (const struct die_reader_specs
*reader
,
15750 struct partial_die_info
*part_die
,
15751 struct abbrev_info
*abbrev
, unsigned int abbrev_len
,
15752 const gdb_byte
*info_ptr
)
15754 struct dwarf2_cu
*cu
= reader
->cu
;
15755 struct objfile
*objfile
= cu
->objfile
;
15756 const gdb_byte
*buffer
= reader
->buffer
;
15758 struct attribute attr
;
15759 int has_low_pc_attr
= 0;
15760 int has_high_pc_attr
= 0;
15761 int high_pc_relative
= 0;
15763 memset (part_die
, 0, sizeof (struct partial_die_info
));
15765 part_die
->offset
.sect_off
= info_ptr
- buffer
;
15767 info_ptr
+= abbrev_len
;
15769 if (abbrev
== NULL
)
15772 part_die
->tag
= abbrev
->tag
;
15773 part_die
->has_children
= abbrev
->has_children
;
15775 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
15777 info_ptr
= read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
15779 /* Store the data if it is of an attribute we want to keep in a
15780 partial symbol table. */
15784 switch (part_die
->tag
)
15786 case DW_TAG_compile_unit
:
15787 case DW_TAG_partial_unit
:
15788 case DW_TAG_type_unit
:
15789 /* Compilation units have a DW_AT_name that is a filename, not
15790 a source language identifier. */
15791 case DW_TAG_enumeration_type
:
15792 case DW_TAG_enumerator
:
15793 /* These tags always have simple identifiers already; no need
15794 to canonicalize them. */
15795 part_die
->name
= DW_STRING (&attr
);
15799 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
15800 &objfile
->per_bfd
->storage_obstack
);
15804 case DW_AT_linkage_name
:
15805 case DW_AT_MIPS_linkage_name
:
15806 /* Note that both forms of linkage name might appear. We
15807 assume they will be the same, and we only store the last
15809 if (cu
->language
== language_ada
)
15810 part_die
->name
= DW_STRING (&attr
);
15811 part_die
->linkage_name
= DW_STRING (&attr
);
15814 has_low_pc_attr
= 1;
15815 part_die
->lowpc
= attr_value_as_address (&attr
);
15817 case DW_AT_high_pc
:
15818 has_high_pc_attr
= 1;
15819 part_die
->highpc
= attr_value_as_address (&attr
);
15820 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
15821 high_pc_relative
= 1;
15823 case DW_AT_location
:
15824 /* Support the .debug_loc offsets. */
15825 if (attr_form_is_block (&attr
))
15827 part_die
->d
.locdesc
= DW_BLOCK (&attr
);
15829 else if (attr_form_is_section_offset (&attr
))
15831 dwarf2_complex_location_expr_complaint ();
15835 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
15836 "partial symbol information");
15839 case DW_AT_external
:
15840 part_die
->is_external
= DW_UNSND (&attr
);
15842 case DW_AT_declaration
:
15843 part_die
->is_declaration
= DW_UNSND (&attr
);
15846 part_die
->has_type
= 1;
15848 case DW_AT_abstract_origin
:
15849 case DW_AT_specification
:
15850 case DW_AT_extension
:
15851 part_die
->has_specification
= 1;
15852 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
15853 part_die
->spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
15854 || cu
->per_cu
->is_dwz
);
15856 case DW_AT_sibling
:
15857 /* Ignore absolute siblings, they might point outside of
15858 the current compile unit. */
15859 if (attr
.form
== DW_FORM_ref_addr
)
15860 complaint (&symfile_complaints
,
15861 _("ignoring absolute DW_AT_sibling"));
15864 unsigned int off
= dwarf2_get_ref_die_offset (&attr
).sect_off
;
15865 const gdb_byte
*sibling_ptr
= buffer
+ off
;
15867 if (sibling_ptr
< info_ptr
)
15868 complaint (&symfile_complaints
,
15869 _("DW_AT_sibling points backwards"));
15870 else if (sibling_ptr
> reader
->buffer_end
)
15871 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
15873 part_die
->sibling
= sibling_ptr
;
15876 case DW_AT_byte_size
:
15877 part_die
->has_byte_size
= 1;
15879 case DW_AT_const_value
:
15880 part_die
->has_const_value
= 1;
15882 case DW_AT_calling_convention
:
15883 /* DWARF doesn't provide a way to identify a program's source-level
15884 entry point. DW_AT_calling_convention attributes are only meant
15885 to describe functions' calling conventions.
15887 However, because it's a necessary piece of information in
15888 Fortran, and before DWARF 4 DW_CC_program was the only
15889 piece of debugging information whose definition refers to
15890 a 'main program' at all, several compilers marked Fortran
15891 main programs with DW_CC_program --- even when those
15892 functions use the standard calling conventions.
15894 Although DWARF now specifies a way to provide this
15895 information, we support this practice for backward
15897 if (DW_UNSND (&attr
) == DW_CC_program
15898 && cu
->language
== language_fortran
)
15899 part_die
->main_subprogram
= 1;
15902 if (DW_UNSND (&attr
) == DW_INL_inlined
15903 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
15904 part_die
->may_be_inlined
= 1;
15908 if (part_die
->tag
== DW_TAG_imported_unit
)
15910 part_die
->d
.offset
= dwarf2_get_ref_die_offset (&attr
);
15911 part_die
->is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
15912 || cu
->per_cu
->is_dwz
);
15916 case DW_AT_main_subprogram
:
15917 part_die
->main_subprogram
= DW_UNSND (&attr
);
15925 if (high_pc_relative
)
15926 part_die
->highpc
+= part_die
->lowpc
;
15928 if (has_low_pc_attr
&& has_high_pc_attr
)
15930 /* When using the GNU linker, .gnu.linkonce. sections are used to
15931 eliminate duplicate copies of functions and vtables and such.
15932 The linker will arbitrarily choose one and discard the others.
15933 The AT_*_pc values for such functions refer to local labels in
15934 these sections. If the section from that file was discarded, the
15935 labels are not in the output, so the relocs get a value of 0.
15936 If this is a discarded function, mark the pc bounds as invalid,
15937 so that GDB will ignore it. */
15938 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
15940 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15942 complaint (&symfile_complaints
,
15943 _("DW_AT_low_pc %s is zero "
15944 "for DIE at 0x%x [in module %s]"),
15945 paddress (gdbarch
, part_die
->lowpc
),
15946 part_die
->offset
.sect_off
, objfile_name (objfile
));
15948 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
15949 else if (part_die
->lowpc
>= part_die
->highpc
)
15951 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15953 complaint (&symfile_complaints
,
15954 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
15955 "for DIE at 0x%x [in module %s]"),
15956 paddress (gdbarch
, part_die
->lowpc
),
15957 paddress (gdbarch
, part_die
->highpc
),
15958 part_die
->offset
.sect_off
, objfile_name (objfile
));
15961 part_die
->has_pc_info
= 1;
15967 /* Find a cached partial DIE at OFFSET in CU. */
15969 static struct partial_die_info
*
15970 find_partial_die_in_comp_unit (sect_offset offset
, struct dwarf2_cu
*cu
)
15972 struct partial_die_info
*lookup_die
= NULL
;
15973 struct partial_die_info part_die
;
15975 part_die
.offset
= offset
;
15976 lookup_die
= ((struct partial_die_info
*)
15977 htab_find_with_hash (cu
->partial_dies
, &part_die
,
15983 /* Find a partial DIE at OFFSET, which may or may not be in CU,
15984 except in the case of .debug_types DIEs which do not reference
15985 outside their CU (they do however referencing other types via
15986 DW_FORM_ref_sig8). */
15988 static struct partial_die_info
*
15989 find_partial_die (sect_offset offset
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
15991 struct objfile
*objfile
= cu
->objfile
;
15992 struct dwarf2_per_cu_data
*per_cu
= NULL
;
15993 struct partial_die_info
*pd
= NULL
;
15995 if (offset_in_dwz
== cu
->per_cu
->is_dwz
15996 && offset_in_cu_p (&cu
->header
, offset
))
15998 pd
= find_partial_die_in_comp_unit (offset
, cu
);
16001 /* We missed recording what we needed.
16002 Load all dies and try again. */
16003 per_cu
= cu
->per_cu
;
16007 /* TUs don't reference other CUs/TUs (except via type signatures). */
16008 if (cu
->per_cu
->is_debug_types
)
16010 error (_("Dwarf Error: Type Unit at offset 0x%lx contains"
16011 " external reference to offset 0x%lx [in module %s].\n"),
16012 (long) cu
->header
.offset
.sect_off
, (long) offset
.sect_off
,
16013 bfd_get_filename (objfile
->obfd
));
16015 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
16018 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
16019 load_partial_comp_unit (per_cu
);
16021 per_cu
->cu
->last_used
= 0;
16022 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
16025 /* If we didn't find it, and not all dies have been loaded,
16026 load them all and try again. */
16028 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
16030 per_cu
->load_all_dies
= 1;
16032 /* This is nasty. When we reread the DIEs, somewhere up the call chain
16033 THIS_CU->cu may already be in use. So we can't just free it and
16034 replace its DIEs with the ones we read in. Instead, we leave those
16035 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
16036 and clobber THIS_CU->cu->partial_dies with the hash table for the new
16038 load_partial_comp_unit (per_cu
);
16040 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
16044 internal_error (__FILE__
, __LINE__
,
16045 _("could not find partial DIE 0x%x "
16046 "in cache [from module %s]\n"),
16047 offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
16051 /* See if we can figure out if the class lives in a namespace. We do
16052 this by looking for a member function; its demangled name will
16053 contain namespace info, if there is any. */
16056 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
16057 struct dwarf2_cu
*cu
)
16059 /* NOTE: carlton/2003-10-07: Getting the info this way changes
16060 what template types look like, because the demangler
16061 frequently doesn't give the same name as the debug info. We
16062 could fix this by only using the demangled name to get the
16063 prefix (but see comment in read_structure_type). */
16065 struct partial_die_info
*real_pdi
;
16066 struct partial_die_info
*child_pdi
;
16068 /* If this DIE (this DIE's specification, if any) has a parent, then
16069 we should not do this. We'll prepend the parent's fully qualified
16070 name when we create the partial symbol. */
16072 real_pdi
= struct_pdi
;
16073 while (real_pdi
->has_specification
)
16074 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
16075 real_pdi
->spec_is_dwz
, cu
);
16077 if (real_pdi
->die_parent
!= NULL
)
16080 for (child_pdi
= struct_pdi
->die_child
;
16082 child_pdi
= child_pdi
->die_sibling
)
16084 if (child_pdi
->tag
== DW_TAG_subprogram
16085 && child_pdi
->linkage_name
!= NULL
)
16087 char *actual_class_name
16088 = language_class_name_from_physname (cu
->language_defn
,
16089 child_pdi
->linkage_name
);
16090 if (actual_class_name
!= NULL
)
16094 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
16096 strlen (actual_class_name
)));
16097 xfree (actual_class_name
);
16104 /* Adjust PART_DIE before generating a symbol for it. This function
16105 may set the is_external flag or change the DIE's name. */
16108 fixup_partial_die (struct partial_die_info
*part_die
,
16109 struct dwarf2_cu
*cu
)
16111 /* Once we've fixed up a die, there's no point in doing so again.
16112 This also avoids a memory leak if we were to call
16113 guess_partial_die_structure_name multiple times. */
16114 if (part_die
->fixup_called
)
16117 /* If we found a reference attribute and the DIE has no name, try
16118 to find a name in the referred to DIE. */
16120 if (part_die
->name
== NULL
&& part_die
->has_specification
)
16122 struct partial_die_info
*spec_die
;
16124 spec_die
= find_partial_die (part_die
->spec_offset
,
16125 part_die
->spec_is_dwz
, cu
);
16127 fixup_partial_die (spec_die
, cu
);
16129 if (spec_die
->name
)
16131 part_die
->name
= spec_die
->name
;
16133 /* Copy DW_AT_external attribute if it is set. */
16134 if (spec_die
->is_external
)
16135 part_die
->is_external
= spec_die
->is_external
;
16139 /* Set default names for some unnamed DIEs. */
16141 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
16142 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
16144 /* If there is no parent die to provide a namespace, and there are
16145 children, see if we can determine the namespace from their linkage
16147 if (cu
->language
== language_cplus
16148 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
16149 && part_die
->die_parent
== NULL
16150 && part_die
->has_children
16151 && (part_die
->tag
== DW_TAG_class_type
16152 || part_die
->tag
== DW_TAG_structure_type
16153 || part_die
->tag
== DW_TAG_union_type
))
16154 guess_partial_die_structure_name (part_die
, cu
);
16156 /* GCC might emit a nameless struct or union that has a linkage
16157 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
16158 if (part_die
->name
== NULL
16159 && (part_die
->tag
== DW_TAG_class_type
16160 || part_die
->tag
== DW_TAG_interface_type
16161 || part_die
->tag
== DW_TAG_structure_type
16162 || part_die
->tag
== DW_TAG_union_type
)
16163 && part_die
->linkage_name
!= NULL
)
16167 demangled
= gdb_demangle (part_die
->linkage_name
, DMGL_TYPES
);
16172 /* Strip any leading namespaces/classes, keep only the base name.
16173 DW_AT_name for named DIEs does not contain the prefixes. */
16174 base
= strrchr (demangled
, ':');
16175 if (base
&& base
> demangled
&& base
[-1] == ':')
16182 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
16183 base
, strlen (base
)));
16188 part_die
->fixup_called
= 1;
16191 /* Read an attribute value described by an attribute form. */
16193 static const gdb_byte
*
16194 read_attribute_value (const struct die_reader_specs
*reader
,
16195 struct attribute
*attr
, unsigned form
,
16196 const gdb_byte
*info_ptr
)
16198 struct dwarf2_cu
*cu
= reader
->cu
;
16199 struct objfile
*objfile
= cu
->objfile
;
16200 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
16201 bfd
*abfd
= reader
->abfd
;
16202 struct comp_unit_head
*cu_header
= &cu
->header
;
16203 unsigned int bytes_read
;
16204 struct dwarf_block
*blk
;
16206 attr
->form
= (enum dwarf_form
) form
;
16209 case DW_FORM_ref_addr
:
16210 if (cu
->header
.version
== 2)
16211 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
16213 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
16214 &cu
->header
, &bytes_read
);
16215 info_ptr
+= bytes_read
;
16217 case DW_FORM_GNU_ref_alt
:
16218 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
16219 info_ptr
+= bytes_read
;
16222 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
16223 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
16224 info_ptr
+= bytes_read
;
16226 case DW_FORM_block2
:
16227 blk
= dwarf_alloc_block (cu
);
16228 blk
->size
= read_2_bytes (abfd
, info_ptr
);
16230 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16231 info_ptr
+= blk
->size
;
16232 DW_BLOCK (attr
) = blk
;
16234 case DW_FORM_block4
:
16235 blk
= dwarf_alloc_block (cu
);
16236 blk
->size
= read_4_bytes (abfd
, info_ptr
);
16238 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16239 info_ptr
+= blk
->size
;
16240 DW_BLOCK (attr
) = blk
;
16242 case DW_FORM_data2
:
16243 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
16246 case DW_FORM_data4
:
16247 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
16250 case DW_FORM_data8
:
16251 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
16254 case DW_FORM_sec_offset
:
16255 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
16256 info_ptr
+= bytes_read
;
16258 case DW_FORM_string
:
16259 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
16260 DW_STRING_IS_CANONICAL (attr
) = 0;
16261 info_ptr
+= bytes_read
;
16264 if (!cu
->per_cu
->is_dwz
)
16266 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
16268 DW_STRING_IS_CANONICAL (attr
) = 0;
16269 info_ptr
+= bytes_read
;
16273 case DW_FORM_GNU_strp_alt
:
16275 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
16276 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
16279 DW_STRING (attr
) = read_indirect_string_from_dwz (dwz
, str_offset
);
16280 DW_STRING_IS_CANONICAL (attr
) = 0;
16281 info_ptr
+= bytes_read
;
16284 case DW_FORM_exprloc
:
16285 case DW_FORM_block
:
16286 blk
= dwarf_alloc_block (cu
);
16287 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16288 info_ptr
+= bytes_read
;
16289 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16290 info_ptr
+= blk
->size
;
16291 DW_BLOCK (attr
) = blk
;
16293 case DW_FORM_block1
:
16294 blk
= dwarf_alloc_block (cu
);
16295 blk
->size
= read_1_byte (abfd
, info_ptr
);
16297 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16298 info_ptr
+= blk
->size
;
16299 DW_BLOCK (attr
) = blk
;
16301 case DW_FORM_data1
:
16302 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16306 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16309 case DW_FORM_flag_present
:
16310 DW_UNSND (attr
) = 1;
16312 case DW_FORM_sdata
:
16313 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
16314 info_ptr
+= bytes_read
;
16316 case DW_FORM_udata
:
16317 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16318 info_ptr
+= bytes_read
;
16321 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16322 + read_1_byte (abfd
, info_ptr
));
16326 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16327 + read_2_bytes (abfd
, info_ptr
));
16331 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16332 + read_4_bytes (abfd
, info_ptr
));
16336 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16337 + read_8_bytes (abfd
, info_ptr
));
16340 case DW_FORM_ref_sig8
:
16341 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
16344 case DW_FORM_ref_udata
:
16345 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16346 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
16347 info_ptr
+= bytes_read
;
16349 case DW_FORM_indirect
:
16350 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16351 info_ptr
+= bytes_read
;
16352 info_ptr
= read_attribute_value (reader
, attr
, form
, info_ptr
);
16354 case DW_FORM_GNU_addr_index
:
16355 if (reader
->dwo_file
== NULL
)
16357 /* For now flag a hard error.
16358 Later we can turn this into a complaint. */
16359 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16360 dwarf_form_name (form
),
16361 bfd_get_filename (abfd
));
16363 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
16364 info_ptr
+= bytes_read
;
16366 case DW_FORM_GNU_str_index
:
16367 if (reader
->dwo_file
== NULL
)
16369 /* For now flag a hard error.
16370 Later we can turn this into a complaint if warranted. */
16371 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16372 dwarf_form_name (form
),
16373 bfd_get_filename (abfd
));
16376 ULONGEST str_index
=
16377 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16379 DW_STRING (attr
) = read_str_index (reader
, str_index
);
16380 DW_STRING_IS_CANONICAL (attr
) = 0;
16381 info_ptr
+= bytes_read
;
16385 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
16386 dwarf_form_name (form
),
16387 bfd_get_filename (abfd
));
16391 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
16392 attr
->form
= DW_FORM_GNU_ref_alt
;
16394 /* We have seen instances where the compiler tried to emit a byte
16395 size attribute of -1 which ended up being encoded as an unsigned
16396 0xffffffff. Although 0xffffffff is technically a valid size value,
16397 an object of this size seems pretty unlikely so we can relatively
16398 safely treat these cases as if the size attribute was invalid and
16399 treat them as zero by default. */
16400 if (attr
->name
== DW_AT_byte_size
16401 && form
== DW_FORM_data4
16402 && DW_UNSND (attr
) >= 0xffffffff)
16405 (&symfile_complaints
,
16406 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
16407 hex_string (DW_UNSND (attr
)));
16408 DW_UNSND (attr
) = 0;
16414 /* Read an attribute described by an abbreviated attribute. */
16416 static const gdb_byte
*
16417 read_attribute (const struct die_reader_specs
*reader
,
16418 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
16419 const gdb_byte
*info_ptr
)
16421 attr
->name
= abbrev
->name
;
16422 return read_attribute_value (reader
, attr
, abbrev
->form
, info_ptr
);
16425 /* Read dwarf information from a buffer. */
16427 static unsigned int
16428 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
16430 return bfd_get_8 (abfd
, buf
);
16434 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
16436 return bfd_get_signed_8 (abfd
, buf
);
16439 static unsigned int
16440 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16442 return bfd_get_16 (abfd
, buf
);
16446 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16448 return bfd_get_signed_16 (abfd
, buf
);
16451 static unsigned int
16452 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16454 return bfd_get_32 (abfd
, buf
);
16458 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16460 return bfd_get_signed_32 (abfd
, buf
);
16464 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16466 return bfd_get_64 (abfd
, buf
);
16470 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
16471 unsigned int *bytes_read
)
16473 struct comp_unit_head
*cu_header
= &cu
->header
;
16474 CORE_ADDR retval
= 0;
16476 if (cu_header
->signed_addr_p
)
16478 switch (cu_header
->addr_size
)
16481 retval
= bfd_get_signed_16 (abfd
, buf
);
16484 retval
= bfd_get_signed_32 (abfd
, buf
);
16487 retval
= bfd_get_signed_64 (abfd
, buf
);
16490 internal_error (__FILE__
, __LINE__
,
16491 _("read_address: bad switch, signed [in module %s]"),
16492 bfd_get_filename (abfd
));
16497 switch (cu_header
->addr_size
)
16500 retval
= bfd_get_16 (abfd
, buf
);
16503 retval
= bfd_get_32 (abfd
, buf
);
16506 retval
= bfd_get_64 (abfd
, buf
);
16509 internal_error (__FILE__
, __LINE__
,
16510 _("read_address: bad switch, "
16511 "unsigned [in module %s]"),
16512 bfd_get_filename (abfd
));
16516 *bytes_read
= cu_header
->addr_size
;
16520 /* Read the initial length from a section. The (draft) DWARF 3
16521 specification allows the initial length to take up either 4 bytes
16522 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
16523 bytes describe the length and all offsets will be 8 bytes in length
16526 An older, non-standard 64-bit format is also handled by this
16527 function. The older format in question stores the initial length
16528 as an 8-byte quantity without an escape value. Lengths greater
16529 than 2^32 aren't very common which means that the initial 4 bytes
16530 is almost always zero. Since a length value of zero doesn't make
16531 sense for the 32-bit format, this initial zero can be considered to
16532 be an escape value which indicates the presence of the older 64-bit
16533 format. As written, the code can't detect (old format) lengths
16534 greater than 4GB. If it becomes necessary to handle lengths
16535 somewhat larger than 4GB, we could allow other small values (such
16536 as the non-sensical values of 1, 2, and 3) to also be used as
16537 escape values indicating the presence of the old format.
16539 The value returned via bytes_read should be used to increment the
16540 relevant pointer after calling read_initial_length().
16542 [ Note: read_initial_length() and read_offset() are based on the
16543 document entitled "DWARF Debugging Information Format", revision
16544 3, draft 8, dated November 19, 2001. This document was obtained
16547 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
16549 This document is only a draft and is subject to change. (So beware.)
16551 Details regarding the older, non-standard 64-bit format were
16552 determined empirically by examining 64-bit ELF files produced by
16553 the SGI toolchain on an IRIX 6.5 machine.
16555 - Kevin, July 16, 2002
16559 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
16561 LONGEST length
= bfd_get_32 (abfd
, buf
);
16563 if (length
== 0xffffffff)
16565 length
= bfd_get_64 (abfd
, buf
+ 4);
16568 else if (length
== 0)
16570 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
16571 length
= bfd_get_64 (abfd
, buf
);
16582 /* Cover function for read_initial_length.
16583 Returns the length of the object at BUF, and stores the size of the
16584 initial length in *BYTES_READ and stores the size that offsets will be in
16586 If the initial length size is not equivalent to that specified in
16587 CU_HEADER then issue a complaint.
16588 This is useful when reading non-comp-unit headers. */
16591 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
16592 const struct comp_unit_head
*cu_header
,
16593 unsigned int *bytes_read
,
16594 unsigned int *offset_size
)
16596 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
16598 gdb_assert (cu_header
->initial_length_size
== 4
16599 || cu_header
->initial_length_size
== 8
16600 || cu_header
->initial_length_size
== 12);
16602 if (cu_header
->initial_length_size
!= *bytes_read
)
16603 complaint (&symfile_complaints
,
16604 _("intermixed 32-bit and 64-bit DWARF sections"));
16606 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
16610 /* Read an offset from the data stream. The size of the offset is
16611 given by cu_header->offset_size. */
16614 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
16615 const struct comp_unit_head
*cu_header
,
16616 unsigned int *bytes_read
)
16618 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
16620 *bytes_read
= cu_header
->offset_size
;
16624 /* Read an offset from the data stream. */
16627 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
16629 LONGEST retval
= 0;
16631 switch (offset_size
)
16634 retval
= bfd_get_32 (abfd
, buf
);
16637 retval
= bfd_get_64 (abfd
, buf
);
16640 internal_error (__FILE__
, __LINE__
,
16641 _("read_offset_1: bad switch [in module %s]"),
16642 bfd_get_filename (abfd
));
16648 static const gdb_byte
*
16649 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
16651 /* If the size of a host char is 8 bits, we can return a pointer
16652 to the buffer, otherwise we have to copy the data to a buffer
16653 allocated on the temporary obstack. */
16654 gdb_assert (HOST_CHAR_BIT
== 8);
16658 static const char *
16659 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
16660 unsigned int *bytes_read_ptr
)
16662 /* If the size of a host char is 8 bits, we can return a pointer
16663 to the string, otherwise we have to copy the string to a buffer
16664 allocated on the temporary obstack. */
16665 gdb_assert (HOST_CHAR_BIT
== 8);
16668 *bytes_read_ptr
= 1;
16671 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
16672 return (const char *) buf
;
16675 static const char *
16676 read_indirect_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
16678 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
16679 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
16680 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
16681 bfd_get_filename (abfd
));
16682 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
16683 error (_("DW_FORM_strp pointing outside of "
16684 ".debug_str section [in module %s]"),
16685 bfd_get_filename (abfd
));
16686 gdb_assert (HOST_CHAR_BIT
== 8);
16687 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
16689 return (const char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
16692 /* Read a string at offset STR_OFFSET in the .debug_str section from
16693 the .dwz file DWZ. Throw an error if the offset is too large. If
16694 the string consists of a single NUL byte, return NULL; otherwise
16695 return a pointer to the string. */
16697 static const char *
16698 read_indirect_string_from_dwz (struct dwz_file
*dwz
, LONGEST str_offset
)
16700 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwz
->str
);
16702 if (dwz
->str
.buffer
== NULL
)
16703 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
16704 "section [in module %s]"),
16705 bfd_get_filename (dwz
->dwz_bfd
));
16706 if (str_offset
>= dwz
->str
.size
)
16707 error (_("DW_FORM_GNU_strp_alt pointing outside of "
16708 ".debug_str section [in module %s]"),
16709 bfd_get_filename (dwz
->dwz_bfd
));
16710 gdb_assert (HOST_CHAR_BIT
== 8);
16711 if (dwz
->str
.buffer
[str_offset
] == '\0')
16713 return (const char *) (dwz
->str
.buffer
+ str_offset
);
16716 static const char *
16717 read_indirect_string (bfd
*abfd
, const gdb_byte
*buf
,
16718 const struct comp_unit_head
*cu_header
,
16719 unsigned int *bytes_read_ptr
)
16721 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
16723 return read_indirect_string_at_offset (abfd
, str_offset
);
16727 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
16728 unsigned int *bytes_read_ptr
)
16731 unsigned int num_read
;
16733 unsigned char byte
;
16740 byte
= bfd_get_8 (abfd
, buf
);
16743 result
|= ((ULONGEST
) (byte
& 127) << shift
);
16744 if ((byte
& 128) == 0)
16750 *bytes_read_ptr
= num_read
;
16755 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
16756 unsigned int *bytes_read_ptr
)
16759 int shift
, num_read
;
16760 unsigned char byte
;
16767 byte
= bfd_get_8 (abfd
, buf
);
16770 result
|= ((LONGEST
) (byte
& 127) << shift
);
16772 if ((byte
& 128) == 0)
16777 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
16778 result
|= -(((LONGEST
) 1) << shift
);
16779 *bytes_read_ptr
= num_read
;
16783 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
16784 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
16785 ADDR_SIZE is the size of addresses from the CU header. */
16788 read_addr_index_1 (unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
16790 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16791 bfd
*abfd
= objfile
->obfd
;
16792 const gdb_byte
*info_ptr
;
16794 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
16795 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
16796 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
16797 objfile_name (objfile
));
16798 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
16799 error (_("DW_FORM_addr_index pointing outside of "
16800 ".debug_addr section [in module %s]"),
16801 objfile_name (objfile
));
16802 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
16803 + addr_base
+ addr_index
* addr_size
);
16804 if (addr_size
== 4)
16805 return bfd_get_32 (abfd
, info_ptr
);
16807 return bfd_get_64 (abfd
, info_ptr
);
16810 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
16813 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
16815 return read_addr_index_1 (addr_index
, cu
->addr_base
, cu
->header
.addr_size
);
16818 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
16821 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
16822 unsigned int *bytes_read
)
16824 bfd
*abfd
= cu
->objfile
->obfd
;
16825 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
16827 return read_addr_index (cu
, addr_index
);
16830 /* Data structure to pass results from dwarf2_read_addr_index_reader
16831 back to dwarf2_read_addr_index. */
16833 struct dwarf2_read_addr_index_data
16835 ULONGEST addr_base
;
16839 /* die_reader_func for dwarf2_read_addr_index. */
16842 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
16843 const gdb_byte
*info_ptr
,
16844 struct die_info
*comp_unit_die
,
16848 struct dwarf2_cu
*cu
= reader
->cu
;
16849 struct dwarf2_read_addr_index_data
*aidata
=
16850 (struct dwarf2_read_addr_index_data
*) data
;
16852 aidata
->addr_base
= cu
->addr_base
;
16853 aidata
->addr_size
= cu
->header
.addr_size
;
16856 /* Given an index in .debug_addr, fetch the value.
16857 NOTE: This can be called during dwarf expression evaluation,
16858 long after the debug information has been read, and thus per_cu->cu
16859 may no longer exist. */
16862 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
16863 unsigned int addr_index
)
16865 struct objfile
*objfile
= per_cu
->objfile
;
16866 struct dwarf2_cu
*cu
= per_cu
->cu
;
16867 ULONGEST addr_base
;
16870 /* This is intended to be called from outside this file. */
16871 dw2_setup (objfile
);
16873 /* We need addr_base and addr_size.
16874 If we don't have PER_CU->cu, we have to get it.
16875 Nasty, but the alternative is storing the needed info in PER_CU,
16876 which at this point doesn't seem justified: it's not clear how frequently
16877 it would get used and it would increase the size of every PER_CU.
16878 Entry points like dwarf2_per_cu_addr_size do a similar thing
16879 so we're not in uncharted territory here.
16880 Alas we need to be a bit more complicated as addr_base is contained
16883 We don't need to read the entire CU(/TU).
16884 We just need the header and top level die.
16886 IWBN to use the aging mechanism to let us lazily later discard the CU.
16887 For now we skip this optimization. */
16891 addr_base
= cu
->addr_base
;
16892 addr_size
= cu
->header
.addr_size
;
16896 struct dwarf2_read_addr_index_data aidata
;
16898 /* Note: We can't use init_cutu_and_read_dies_simple here,
16899 we need addr_base. */
16900 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
16901 dwarf2_read_addr_index_reader
, &aidata
);
16902 addr_base
= aidata
.addr_base
;
16903 addr_size
= aidata
.addr_size
;
16906 return read_addr_index_1 (addr_index
, addr_base
, addr_size
);
16909 /* Given a DW_FORM_GNU_str_index, fetch the string.
16910 This is only used by the Fission support. */
16912 static const char *
16913 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
16915 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16916 const char *objf_name
= objfile_name (objfile
);
16917 bfd
*abfd
= objfile
->obfd
;
16918 struct dwarf2_cu
*cu
= reader
->cu
;
16919 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
16920 struct dwarf2_section_info
*str_offsets_section
=
16921 &reader
->dwo_file
->sections
.str_offsets
;
16922 const gdb_byte
*info_ptr
;
16923 ULONGEST str_offset
;
16924 static const char form_name
[] = "DW_FORM_GNU_str_index";
16926 dwarf2_read_section (objfile
, str_section
);
16927 dwarf2_read_section (objfile
, str_offsets_section
);
16928 if (str_section
->buffer
== NULL
)
16929 error (_("%s used without .debug_str.dwo section"
16930 " in CU at offset 0x%lx [in module %s]"),
16931 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16932 if (str_offsets_section
->buffer
== NULL
)
16933 error (_("%s used without .debug_str_offsets.dwo section"
16934 " in CU at offset 0x%lx [in module %s]"),
16935 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16936 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
16937 error (_("%s pointing outside of .debug_str_offsets.dwo"
16938 " section in CU at offset 0x%lx [in module %s]"),
16939 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16940 info_ptr
= (str_offsets_section
->buffer
16941 + str_index
* cu
->header
.offset_size
);
16942 if (cu
->header
.offset_size
== 4)
16943 str_offset
= bfd_get_32 (abfd
, info_ptr
);
16945 str_offset
= bfd_get_64 (abfd
, info_ptr
);
16946 if (str_offset
>= str_section
->size
)
16947 error (_("Offset from %s pointing outside of"
16948 " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"),
16949 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16950 return (const char *) (str_section
->buffer
+ str_offset
);
16953 /* Return the length of an LEB128 number in BUF. */
16956 leb128_size (const gdb_byte
*buf
)
16958 const gdb_byte
*begin
= buf
;
16964 if ((byte
& 128) == 0)
16965 return buf
- begin
;
16970 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
16979 cu
->language
= language_c
;
16982 case DW_LANG_C_plus_plus
:
16983 case DW_LANG_C_plus_plus_11
:
16984 case DW_LANG_C_plus_plus_14
:
16985 cu
->language
= language_cplus
;
16988 cu
->language
= language_d
;
16990 case DW_LANG_Fortran77
:
16991 case DW_LANG_Fortran90
:
16992 case DW_LANG_Fortran95
:
16993 case DW_LANG_Fortran03
:
16994 case DW_LANG_Fortran08
:
16995 cu
->language
= language_fortran
;
16998 cu
->language
= language_go
;
17000 case DW_LANG_Mips_Assembler
:
17001 cu
->language
= language_asm
;
17003 case DW_LANG_Ada83
:
17004 case DW_LANG_Ada95
:
17005 cu
->language
= language_ada
;
17007 case DW_LANG_Modula2
:
17008 cu
->language
= language_m2
;
17010 case DW_LANG_Pascal83
:
17011 cu
->language
= language_pascal
;
17014 cu
->language
= language_objc
;
17017 case DW_LANG_Rust_old
:
17018 cu
->language
= language_rust
;
17020 case DW_LANG_Cobol74
:
17021 case DW_LANG_Cobol85
:
17023 cu
->language
= language_minimal
;
17026 cu
->language_defn
= language_def (cu
->language
);
17029 /* Return the named attribute or NULL if not there. */
17031 static struct attribute
*
17032 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
17037 struct attribute
*spec
= NULL
;
17039 for (i
= 0; i
< die
->num_attrs
; ++i
)
17041 if (die
->attrs
[i
].name
== name
)
17042 return &die
->attrs
[i
];
17043 if (die
->attrs
[i
].name
== DW_AT_specification
17044 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
17045 spec
= &die
->attrs
[i
];
17051 die
= follow_die_ref (die
, spec
, &cu
);
17057 /* Return the named attribute or NULL if not there,
17058 but do not follow DW_AT_specification, etc.
17059 This is for use in contexts where we're reading .debug_types dies.
17060 Following DW_AT_specification, DW_AT_abstract_origin will take us
17061 back up the chain, and we want to go down. */
17063 static struct attribute
*
17064 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
17068 for (i
= 0; i
< die
->num_attrs
; ++i
)
17069 if (die
->attrs
[i
].name
== name
)
17070 return &die
->attrs
[i
];
17075 /* Return the string associated with a string-typed attribute, or NULL if it
17076 is either not found or is of an incorrect type. */
17078 static const char *
17079 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
17081 struct attribute
*attr
;
17082 const char *str
= NULL
;
17084 attr
= dwarf2_attr (die
, name
, cu
);
17088 if (attr
->form
== DW_FORM_strp
|| attr
->form
== DW_FORM_string
17089 || attr
->form
== DW_FORM_GNU_strp_alt
)
17090 str
= DW_STRING (attr
);
17092 complaint (&symfile_complaints
,
17093 _("string type expected for attribute %s for "
17094 "DIE at 0x%x in module %s"),
17095 dwarf_attr_name (name
), die
->offset
.sect_off
,
17096 objfile_name (cu
->objfile
));
17102 /* Return non-zero iff the attribute NAME is defined for the given DIE,
17103 and holds a non-zero value. This function should only be used for
17104 DW_FORM_flag or DW_FORM_flag_present attributes. */
17107 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
17109 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
17111 return (attr
&& DW_UNSND (attr
));
17115 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
17117 /* A DIE is a declaration if it has a DW_AT_declaration attribute
17118 which value is non-zero. However, we have to be careful with
17119 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
17120 (via dwarf2_flag_true_p) follows this attribute. So we may
17121 end up accidently finding a declaration attribute that belongs
17122 to a different DIE referenced by the specification attribute,
17123 even though the given DIE does not have a declaration attribute. */
17124 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
17125 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
17128 /* Return the die giving the specification for DIE, if there is
17129 one. *SPEC_CU is the CU containing DIE on input, and the CU
17130 containing the return value on output. If there is no
17131 specification, but there is an abstract origin, that is
17134 static struct die_info
*
17135 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
17137 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
17140 if (spec_attr
== NULL
)
17141 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
17143 if (spec_attr
== NULL
)
17146 return follow_die_ref (die
, spec_attr
, spec_cu
);
17149 /* Free the line_header structure *LH, and any arrays and strings it
17151 NOTE: This is also used as a "cleanup" function. */
17154 free_line_header (struct line_header
*lh
)
17156 if (lh
->standard_opcode_lengths
)
17157 xfree (lh
->standard_opcode_lengths
);
17159 /* Remember that all the lh->file_names[i].name pointers are
17160 pointers into debug_line_buffer, and don't need to be freed. */
17161 if (lh
->file_names
)
17162 xfree (lh
->file_names
);
17164 /* Similarly for the include directory names. */
17165 if (lh
->include_dirs
)
17166 xfree (lh
->include_dirs
);
17171 /* Stub for free_line_header to match void * callback types. */
17174 free_line_header_voidp (void *arg
)
17176 struct line_header
*lh
= (struct line_header
*) arg
;
17178 free_line_header (lh
);
17181 /* Add an entry to LH's include directory table. */
17184 add_include_dir (struct line_header
*lh
, const char *include_dir
)
17186 if (dwarf_line_debug
>= 2)
17187 fprintf_unfiltered (gdb_stdlog
, "Adding dir %u: %s\n",
17188 lh
->num_include_dirs
+ 1, include_dir
);
17190 /* Grow the array if necessary. */
17191 if (lh
->include_dirs_size
== 0)
17193 lh
->include_dirs_size
= 1; /* for testing */
17194 lh
->include_dirs
= XNEWVEC (const char *, lh
->include_dirs_size
);
17196 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
17198 lh
->include_dirs_size
*= 2;
17199 lh
->include_dirs
= XRESIZEVEC (const char *, lh
->include_dirs
,
17200 lh
->include_dirs_size
);
17203 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
17206 /* Add an entry to LH's file name table. */
17209 add_file_name (struct line_header
*lh
,
17211 unsigned int dir_index
,
17212 unsigned int mod_time
,
17213 unsigned int length
)
17215 struct file_entry
*fe
;
17217 if (dwarf_line_debug
>= 2)
17218 fprintf_unfiltered (gdb_stdlog
, "Adding file %u: %s\n",
17219 lh
->num_file_names
+ 1, name
);
17221 /* Grow the array if necessary. */
17222 if (lh
->file_names_size
== 0)
17224 lh
->file_names_size
= 1; /* for testing */
17225 lh
->file_names
= XNEWVEC (struct file_entry
, lh
->file_names_size
);
17227 else if (lh
->num_file_names
>= lh
->file_names_size
)
17229 lh
->file_names_size
*= 2;
17231 = XRESIZEVEC (struct file_entry
, lh
->file_names
, lh
->file_names_size
);
17234 fe
= &lh
->file_names
[lh
->num_file_names
++];
17236 fe
->dir_index
= dir_index
;
17237 fe
->mod_time
= mod_time
;
17238 fe
->length
= length
;
17239 fe
->included_p
= 0;
17243 /* A convenience function to find the proper .debug_line section for a CU. */
17245 static struct dwarf2_section_info
*
17246 get_debug_line_section (struct dwarf2_cu
*cu
)
17248 struct dwarf2_section_info
*section
;
17250 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
17252 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
17253 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
17254 else if (cu
->per_cu
->is_dwz
)
17256 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
17258 section
= &dwz
->line
;
17261 section
= &dwarf2_per_objfile
->line
;
17266 /* Read the statement program header starting at OFFSET in
17267 .debug_line, or .debug_line.dwo. Return a pointer
17268 to a struct line_header, allocated using xmalloc.
17269 Returns NULL if there is a problem reading the header, e.g., if it
17270 has a version we don't understand.
17272 NOTE: the strings in the include directory and file name tables of
17273 the returned object point into the dwarf line section buffer,
17274 and must not be freed. */
17276 static struct line_header
*
17277 dwarf_decode_line_header (unsigned int offset
, struct dwarf2_cu
*cu
)
17279 struct cleanup
*back_to
;
17280 struct line_header
*lh
;
17281 const gdb_byte
*line_ptr
;
17282 unsigned int bytes_read
, offset_size
;
17284 const char *cur_dir
, *cur_file
;
17285 struct dwarf2_section_info
*section
;
17288 section
= get_debug_line_section (cu
);
17289 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
17290 if (section
->buffer
== NULL
)
17292 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
17293 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
17295 complaint (&symfile_complaints
, _("missing .debug_line section"));
17299 /* We can't do this until we know the section is non-empty.
17300 Only then do we know we have such a section. */
17301 abfd
= get_section_bfd_owner (section
);
17303 /* Make sure that at least there's room for the total_length field.
17304 That could be 12 bytes long, but we're just going to fudge that. */
17305 if (offset
+ 4 >= section
->size
)
17307 dwarf2_statement_list_fits_in_line_number_section_complaint ();
17311 lh
= XNEW (struct line_header
);
17312 memset (lh
, 0, sizeof (*lh
));
17313 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
17316 lh
->offset
.sect_off
= offset
;
17317 lh
->offset_in_dwz
= cu
->per_cu
->is_dwz
;
17319 line_ptr
= section
->buffer
+ offset
;
17321 /* Read in the header. */
17323 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
17324 &bytes_read
, &offset_size
);
17325 line_ptr
+= bytes_read
;
17326 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
17328 dwarf2_statement_list_fits_in_line_number_section_complaint ();
17329 do_cleanups (back_to
);
17332 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
17333 lh
->version
= read_2_bytes (abfd
, line_ptr
);
17335 if (lh
->version
> 4)
17337 /* This is a version we don't understand. The format could have
17338 changed in ways we don't handle properly so just punt. */
17339 complaint (&symfile_complaints
,
17340 _("unsupported version in .debug_line section"));
17343 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
17344 line_ptr
+= offset_size
;
17345 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
17347 if (lh
->version
>= 4)
17349 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
17353 lh
->maximum_ops_per_instruction
= 1;
17355 if (lh
->maximum_ops_per_instruction
== 0)
17357 lh
->maximum_ops_per_instruction
= 1;
17358 complaint (&symfile_complaints
,
17359 _("invalid maximum_ops_per_instruction "
17360 "in `.debug_line' section"));
17363 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
17365 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
17367 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
17369 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
17371 lh
->standard_opcode_lengths
= XNEWVEC (unsigned char, lh
->opcode_base
);
17373 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
17374 for (i
= 1; i
< lh
->opcode_base
; ++i
)
17376 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
17380 /* Read directory table. */
17381 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
17383 line_ptr
+= bytes_read
;
17384 add_include_dir (lh
, cur_dir
);
17386 line_ptr
+= bytes_read
;
17388 /* Read file name table. */
17389 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
17391 unsigned int dir_index
, mod_time
, length
;
17393 line_ptr
+= bytes_read
;
17394 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17395 line_ptr
+= bytes_read
;
17396 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17397 line_ptr
+= bytes_read
;
17398 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17399 line_ptr
+= bytes_read
;
17401 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
17403 line_ptr
+= bytes_read
;
17404 lh
->statement_program_start
= line_ptr
;
17406 if (line_ptr
> (section
->buffer
+ section
->size
))
17407 complaint (&symfile_complaints
,
17408 _("line number info header doesn't "
17409 "fit in `.debug_line' section"));
17411 discard_cleanups (back_to
);
17415 /* Subroutine of dwarf_decode_lines to simplify it.
17416 Return the file name of the psymtab for included file FILE_INDEX
17417 in line header LH of PST.
17418 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
17419 If space for the result is malloc'd, it will be freed by a cleanup.
17420 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename.
17422 The function creates dangling cleanup registration. */
17424 static const char *
17425 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
17426 const struct partial_symtab
*pst
,
17427 const char *comp_dir
)
17429 const struct file_entry fe
= lh
->file_names
[file_index
];
17430 const char *include_name
= fe
.name
;
17431 const char *include_name_to_compare
= include_name
;
17432 const char *dir_name
= NULL
;
17433 const char *pst_filename
;
17434 char *copied_name
= NULL
;
17437 if (fe
.dir_index
&& lh
->include_dirs
!= NULL
)
17438 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
17440 if (!IS_ABSOLUTE_PATH (include_name
)
17441 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
17443 /* Avoid creating a duplicate psymtab for PST.
17444 We do this by comparing INCLUDE_NAME and PST_FILENAME.
17445 Before we do the comparison, however, we need to account
17446 for DIR_NAME and COMP_DIR.
17447 First prepend dir_name (if non-NULL). If we still don't
17448 have an absolute path prepend comp_dir (if non-NULL).
17449 However, the directory we record in the include-file's
17450 psymtab does not contain COMP_DIR (to match the
17451 corresponding symtab(s)).
17456 bash$ gcc -g ./hello.c
17457 include_name = "hello.c"
17459 DW_AT_comp_dir = comp_dir = "/tmp"
17460 DW_AT_name = "./hello.c"
17464 if (dir_name
!= NULL
)
17466 char *tem
= concat (dir_name
, SLASH_STRING
,
17467 include_name
, (char *)NULL
);
17469 make_cleanup (xfree
, tem
);
17470 include_name
= tem
;
17471 include_name_to_compare
= include_name
;
17473 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
17475 char *tem
= concat (comp_dir
, SLASH_STRING
,
17476 include_name
, (char *)NULL
);
17478 make_cleanup (xfree
, tem
);
17479 include_name_to_compare
= tem
;
17483 pst_filename
= pst
->filename
;
17484 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
17486 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
17487 pst_filename
, (char *)NULL
);
17488 pst_filename
= copied_name
;
17491 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
17493 if (copied_name
!= NULL
)
17494 xfree (copied_name
);
17498 return include_name
;
17501 /* State machine to track the state of the line number program. */
17505 /* These are part of the standard DWARF line number state machine. */
17507 unsigned char op_index
;
17512 unsigned int discriminator
;
17514 /* Additional bits of state we need to track. */
17516 /* The last file that we called dwarf2_start_subfile for.
17517 This is only used for TLLs. */
17518 unsigned int last_file
;
17519 /* The last file a line number was recorded for. */
17520 struct subfile
*last_subfile
;
17522 /* The function to call to record a line. */
17523 record_line_ftype
*record_line
;
17525 /* The last line number that was recorded, used to coalesce
17526 consecutive entries for the same line. This can happen, for
17527 example, when discriminators are present. PR 17276. */
17528 unsigned int last_line
;
17529 int line_has_non_zero_discriminator
;
17530 } lnp_state_machine
;
17532 /* There's a lot of static state to pass to dwarf_record_line.
17533 This keeps it all together. */
17538 struct gdbarch
*gdbarch
;
17540 /* The line number header. */
17541 struct line_header
*line_header
;
17543 /* Non-zero if we're recording lines.
17544 Otherwise we're building partial symtabs and are just interested in
17545 finding include files mentioned by the line number program. */
17546 int record_lines_p
;
17547 } lnp_reader_state
;
17549 /* Ignore this record_line request. */
17552 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
17557 /* Return non-zero if we should add LINE to the line number table.
17558 LINE is the line to add, LAST_LINE is the last line that was added,
17559 LAST_SUBFILE is the subfile for LAST_LINE.
17560 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
17561 had a non-zero discriminator.
17563 We have to be careful in the presence of discriminators.
17564 E.g., for this line:
17566 for (i = 0; i < 100000; i++);
17568 clang can emit four line number entries for that one line,
17569 each with a different discriminator.
17570 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
17572 However, we want gdb to coalesce all four entries into one.
17573 Otherwise the user could stepi into the middle of the line and
17574 gdb would get confused about whether the pc really was in the
17575 middle of the line.
17577 Things are further complicated by the fact that two consecutive
17578 line number entries for the same line is a heuristic used by gcc
17579 to denote the end of the prologue. So we can't just discard duplicate
17580 entries, we have to be selective about it. The heuristic we use is
17581 that we only collapse consecutive entries for the same line if at least
17582 one of those entries has a non-zero discriminator. PR 17276.
17584 Note: Addresses in the line number state machine can never go backwards
17585 within one sequence, thus this coalescing is ok. */
17588 dwarf_record_line_p (unsigned int line
, unsigned int last_line
,
17589 int line_has_non_zero_discriminator
,
17590 struct subfile
*last_subfile
)
17592 if (current_subfile
!= last_subfile
)
17594 if (line
!= last_line
)
17596 /* Same line for the same file that we've seen already.
17597 As a last check, for pr 17276, only record the line if the line
17598 has never had a non-zero discriminator. */
17599 if (!line_has_non_zero_discriminator
)
17604 /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS
17605 in the line table of subfile SUBFILE. */
17608 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
17609 unsigned int line
, CORE_ADDR address
,
17610 record_line_ftype p_record_line
)
17612 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
17614 if (dwarf_line_debug
)
17616 fprintf_unfiltered (gdb_stdlog
,
17617 "Recording line %u, file %s, address %s\n",
17618 line
, lbasename (subfile
->name
),
17619 paddress (gdbarch
, address
));
17622 (*p_record_line
) (subfile
, line
, addr
);
17625 /* Subroutine of dwarf_decode_lines_1 to simplify it.
17626 Mark the end of a set of line number records.
17627 The arguments are the same as for dwarf_record_line_1.
17628 If SUBFILE is NULL the request is ignored. */
17631 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
17632 CORE_ADDR address
, record_line_ftype p_record_line
)
17634 if (subfile
== NULL
)
17637 if (dwarf_line_debug
)
17639 fprintf_unfiltered (gdb_stdlog
,
17640 "Finishing current line, file %s, address %s\n",
17641 lbasename (subfile
->name
),
17642 paddress (gdbarch
, address
));
17645 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, p_record_line
);
17648 /* Record the line in STATE.
17649 END_SEQUENCE is non-zero if we're processing the end of a sequence. */
17652 dwarf_record_line (lnp_reader_state
*reader
, lnp_state_machine
*state
,
17655 const struct line_header
*lh
= reader
->line_header
;
17656 unsigned int file
, line
, discriminator
;
17659 file
= state
->file
;
17660 line
= state
->line
;
17661 is_stmt
= state
->is_stmt
;
17662 discriminator
= state
->discriminator
;
17664 if (dwarf_line_debug
)
17666 fprintf_unfiltered (gdb_stdlog
,
17667 "Processing actual line %u: file %u,"
17668 " address %s, is_stmt %u, discrim %u\n",
17670 paddress (reader
->gdbarch
, state
->address
),
17671 is_stmt
, discriminator
);
17674 if (file
== 0 || file
- 1 >= lh
->num_file_names
)
17675 dwarf2_debug_line_missing_file_complaint ();
17676 /* For now we ignore lines not starting on an instruction boundary.
17677 But not when processing end_sequence for compatibility with the
17678 previous version of the code. */
17679 else if (state
->op_index
== 0 || end_sequence
)
17681 lh
->file_names
[file
- 1].included_p
= 1;
17682 if (reader
->record_lines_p
&& is_stmt
)
17684 if (state
->last_subfile
!= current_subfile
|| end_sequence
)
17686 dwarf_finish_line (reader
->gdbarch
, state
->last_subfile
,
17687 state
->address
, state
->record_line
);
17692 if (dwarf_record_line_p (line
, state
->last_line
,
17693 state
->line_has_non_zero_discriminator
,
17694 state
->last_subfile
))
17696 dwarf_record_line_1 (reader
->gdbarch
, current_subfile
,
17697 line
, state
->address
,
17698 state
->record_line
);
17700 state
->last_subfile
= current_subfile
;
17701 state
->last_line
= line
;
17707 /* Initialize STATE for the start of a line number program. */
17710 init_lnp_state_machine (lnp_state_machine
*state
,
17711 const lnp_reader_state
*reader
)
17713 memset (state
, 0, sizeof (*state
));
17715 /* Just starting, there is no "last file". */
17716 state
->last_file
= 0;
17717 state
->last_subfile
= NULL
;
17719 state
->record_line
= record_line
;
17721 state
->last_line
= 0;
17722 state
->line_has_non_zero_discriminator
= 0;
17724 /* Initialize these according to the DWARF spec. */
17725 state
->op_index
= 0;
17728 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
17729 was a line entry for it so that the backend has a chance to adjust it
17730 and also record it in case it needs it. This is currently used by MIPS
17731 code, cf. `mips_adjust_dwarf2_line'. */
17732 state
->address
= gdbarch_adjust_dwarf2_line (reader
->gdbarch
, 0, 0);
17733 state
->is_stmt
= reader
->line_header
->default_is_stmt
;
17734 state
->discriminator
= 0;
17737 /* Check address and if invalid nop-out the rest of the lines in this
17741 check_line_address (struct dwarf2_cu
*cu
, lnp_state_machine
*state
,
17742 const gdb_byte
*line_ptr
,
17743 CORE_ADDR lowpc
, CORE_ADDR address
)
17745 /* If address < lowpc then it's not a usable value, it's outside the
17746 pc range of the CU. However, we restrict the test to only address
17747 values of zero to preserve GDB's previous behaviour which is to
17748 handle the specific case of a function being GC'd by the linker. */
17750 if (address
== 0 && address
< lowpc
)
17752 /* This line table is for a function which has been
17753 GCd by the linker. Ignore it. PR gdb/12528 */
17755 struct objfile
*objfile
= cu
->objfile
;
17756 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
17758 complaint (&symfile_complaints
,
17759 _(".debug_line address at offset 0x%lx is 0 [in module %s]"),
17760 line_offset
, objfile_name (objfile
));
17761 state
->record_line
= noop_record_line
;
17762 /* Note: sm.record_line is left as noop_record_line
17763 until we see DW_LNE_end_sequence. */
17767 /* Subroutine of dwarf_decode_lines to simplify it.
17768 Process the line number information in LH.
17769 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
17770 program in order to set included_p for every referenced header. */
17773 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
17774 const int decode_for_pst_p
, CORE_ADDR lowpc
)
17776 const gdb_byte
*line_ptr
, *extended_end
;
17777 const gdb_byte
*line_end
;
17778 unsigned int bytes_read
, extended_len
;
17779 unsigned char op_code
, extended_op
;
17780 CORE_ADDR baseaddr
;
17781 struct objfile
*objfile
= cu
->objfile
;
17782 bfd
*abfd
= objfile
->obfd
;
17783 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17784 /* Non-zero if we're recording line info (as opposed to building partial
17786 int record_lines_p
= !decode_for_pst_p
;
17787 /* A collection of things we need to pass to dwarf_record_line. */
17788 lnp_reader_state reader_state
;
17790 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
17792 line_ptr
= lh
->statement_program_start
;
17793 line_end
= lh
->statement_program_end
;
17795 reader_state
.gdbarch
= gdbarch
;
17796 reader_state
.line_header
= lh
;
17797 reader_state
.record_lines_p
= record_lines_p
;
17799 /* Read the statement sequences until there's nothing left. */
17800 while (line_ptr
< line_end
)
17802 /* The DWARF line number program state machine. */
17803 lnp_state_machine state_machine
;
17804 int end_sequence
= 0;
17806 /* Reset the state machine at the start of each sequence. */
17807 init_lnp_state_machine (&state_machine
, &reader_state
);
17809 if (record_lines_p
&& lh
->num_file_names
>= state_machine
.file
)
17811 /* Start a subfile for the current file of the state machine. */
17812 /* lh->include_dirs and lh->file_names are 0-based, but the
17813 directory and file name numbers in the statement program
17815 struct file_entry
*fe
= &lh
->file_names
[state_machine
.file
- 1];
17816 const char *dir
= NULL
;
17818 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
17819 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17821 dwarf2_start_subfile (fe
->name
, dir
);
17824 /* Decode the table. */
17825 while (line_ptr
< line_end
&& !end_sequence
)
17827 op_code
= read_1_byte (abfd
, line_ptr
);
17830 if (op_code
>= lh
->opcode_base
)
17832 /* Special opcode. */
17833 unsigned char adj_opcode
;
17834 CORE_ADDR addr_adj
;
17837 adj_opcode
= op_code
- lh
->opcode_base
;
17838 addr_adj
= (((state_machine
.op_index
17839 + (adj_opcode
/ lh
->line_range
))
17840 / lh
->maximum_ops_per_instruction
)
17841 * lh
->minimum_instruction_length
);
17842 state_machine
.address
17843 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17844 state_machine
.op_index
= ((state_machine
.op_index
17845 + (adj_opcode
/ lh
->line_range
))
17846 % lh
->maximum_ops_per_instruction
);
17847 line_delta
= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
17848 state_machine
.line
+= line_delta
;
17849 if (line_delta
!= 0)
17850 state_machine
.line_has_non_zero_discriminator
17851 = state_machine
.discriminator
!= 0;
17853 dwarf_record_line (&reader_state
, &state_machine
, 0);
17854 state_machine
.discriminator
= 0;
17856 else switch (op_code
)
17858 case DW_LNS_extended_op
:
17859 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
17861 line_ptr
+= bytes_read
;
17862 extended_end
= line_ptr
+ extended_len
;
17863 extended_op
= read_1_byte (abfd
, line_ptr
);
17865 switch (extended_op
)
17867 case DW_LNE_end_sequence
:
17868 state_machine
.record_line
= record_line
;
17871 case DW_LNE_set_address
:
17874 = read_address (abfd
, line_ptr
, cu
, &bytes_read
);
17876 line_ptr
+= bytes_read
;
17877 check_line_address (cu
, &state_machine
, line_ptr
,
17879 state_machine
.op_index
= 0;
17880 address
+= baseaddr
;
17881 state_machine
.address
17882 = gdbarch_adjust_dwarf2_line (gdbarch
, address
, 0);
17885 case DW_LNE_define_file
:
17887 const char *cur_file
;
17888 unsigned int dir_index
, mod_time
, length
;
17890 cur_file
= read_direct_string (abfd
, line_ptr
,
17892 line_ptr
+= bytes_read
;
17894 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17895 line_ptr
+= bytes_read
;
17897 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17898 line_ptr
+= bytes_read
;
17900 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17901 line_ptr
+= bytes_read
;
17902 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
17905 case DW_LNE_set_discriminator
:
17906 /* The discriminator is not interesting to the debugger;
17907 just ignore it. We still need to check its value though:
17908 if there are consecutive entries for the same
17909 (non-prologue) line we want to coalesce them.
17911 state_machine
.discriminator
17912 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17913 state_machine
.line_has_non_zero_discriminator
17914 |= state_machine
.discriminator
!= 0;
17915 line_ptr
+= bytes_read
;
17918 complaint (&symfile_complaints
,
17919 _("mangled .debug_line section"));
17922 /* Make sure that we parsed the extended op correctly. If e.g.
17923 we expected a different address size than the producer used,
17924 we may have read the wrong number of bytes. */
17925 if (line_ptr
!= extended_end
)
17927 complaint (&symfile_complaints
,
17928 _("mangled .debug_line section"));
17933 dwarf_record_line (&reader_state
, &state_machine
, 0);
17934 state_machine
.discriminator
= 0;
17936 case DW_LNS_advance_pc
:
17939 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17940 CORE_ADDR addr_adj
;
17942 addr_adj
= (((state_machine
.op_index
+ adjust
)
17943 / lh
->maximum_ops_per_instruction
)
17944 * lh
->minimum_instruction_length
);
17945 state_machine
.address
17946 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17947 state_machine
.op_index
= ((state_machine
.op_index
+ adjust
)
17948 % lh
->maximum_ops_per_instruction
);
17949 line_ptr
+= bytes_read
;
17952 case DW_LNS_advance_line
:
17955 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
17957 state_machine
.line
+= line_delta
;
17958 if (line_delta
!= 0)
17959 state_machine
.line_has_non_zero_discriminator
17960 = state_machine
.discriminator
!= 0;
17961 line_ptr
+= bytes_read
;
17964 case DW_LNS_set_file
:
17966 /* The arrays lh->include_dirs and lh->file_names are
17967 0-based, but the directory and file name numbers in
17968 the statement program are 1-based. */
17969 struct file_entry
*fe
;
17970 const char *dir
= NULL
;
17972 state_machine
.file
= read_unsigned_leb128 (abfd
, line_ptr
,
17974 line_ptr
+= bytes_read
;
17975 if (state_machine
.file
== 0
17976 || state_machine
.file
- 1 >= lh
->num_file_names
)
17977 dwarf2_debug_line_missing_file_complaint ();
17980 fe
= &lh
->file_names
[state_machine
.file
- 1];
17981 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
17982 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17983 if (record_lines_p
)
17985 state_machine
.last_subfile
= current_subfile
;
17986 state_machine
.line_has_non_zero_discriminator
17987 = state_machine
.discriminator
!= 0;
17988 dwarf2_start_subfile (fe
->name
, dir
);
17993 case DW_LNS_set_column
:
17994 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17995 line_ptr
+= bytes_read
;
17997 case DW_LNS_negate_stmt
:
17998 state_machine
.is_stmt
= (!state_machine
.is_stmt
);
18000 case DW_LNS_set_basic_block
:
18002 /* Add to the address register of the state machine the
18003 address increment value corresponding to special opcode
18004 255. I.e., this value is scaled by the minimum
18005 instruction length since special opcode 255 would have
18006 scaled the increment. */
18007 case DW_LNS_const_add_pc
:
18009 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
18010 CORE_ADDR addr_adj
;
18012 addr_adj
= (((state_machine
.op_index
+ adjust
)
18013 / lh
->maximum_ops_per_instruction
)
18014 * lh
->minimum_instruction_length
);
18015 state_machine
.address
18016 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
18017 state_machine
.op_index
= ((state_machine
.op_index
+ adjust
)
18018 % lh
->maximum_ops_per_instruction
);
18021 case DW_LNS_fixed_advance_pc
:
18023 CORE_ADDR addr_adj
;
18025 addr_adj
= read_2_bytes (abfd
, line_ptr
);
18026 state_machine
.address
18027 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
18028 state_machine
.op_index
= 0;
18034 /* Unknown standard opcode, ignore it. */
18037 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
18039 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18040 line_ptr
+= bytes_read
;
18047 dwarf2_debug_line_missing_end_sequence_complaint ();
18049 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
18050 in which case we still finish recording the last line). */
18051 dwarf_record_line (&reader_state
, &state_machine
, 1);
18055 /* Decode the Line Number Program (LNP) for the given line_header
18056 structure and CU. The actual information extracted and the type
18057 of structures created from the LNP depends on the value of PST.
18059 1. If PST is NULL, then this procedure uses the data from the program
18060 to create all necessary symbol tables, and their linetables.
18062 2. If PST is not NULL, this procedure reads the program to determine
18063 the list of files included by the unit represented by PST, and
18064 builds all the associated partial symbol tables.
18066 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
18067 It is used for relative paths in the line table.
18068 NOTE: When processing partial symtabs (pst != NULL),
18069 comp_dir == pst->dirname.
18071 NOTE: It is important that psymtabs have the same file name (via strcmp)
18072 as the corresponding symtab. Since COMP_DIR is not used in the name of the
18073 symtab we don't use it in the name of the psymtabs we create.
18074 E.g. expand_line_sal requires this when finding psymtabs to expand.
18075 A good testcase for this is mb-inline.exp.
18077 LOWPC is the lowest address in CU (or 0 if not known).
18079 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
18080 for its PC<->lines mapping information. Otherwise only the filename
18081 table is read in. */
18084 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
18085 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
18086 CORE_ADDR lowpc
, int decode_mapping
)
18088 struct objfile
*objfile
= cu
->objfile
;
18089 const int decode_for_pst_p
= (pst
!= NULL
);
18091 if (decode_mapping
)
18092 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
18094 if (decode_for_pst_p
)
18098 /* Now that we're done scanning the Line Header Program, we can
18099 create the psymtab of each included file. */
18100 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
18101 if (lh
->file_names
[file_index
].included_p
== 1)
18103 const char *include_name
=
18104 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
18105 if (include_name
!= NULL
)
18106 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
18111 /* Make sure a symtab is created for every file, even files
18112 which contain only variables (i.e. no code with associated
18114 struct compunit_symtab
*cust
= buildsym_compunit_symtab ();
18117 for (i
= 0; i
< lh
->num_file_names
; i
++)
18119 const char *dir
= NULL
;
18120 struct file_entry
*fe
;
18122 fe
= &lh
->file_names
[i
];
18123 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
18124 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
18125 dwarf2_start_subfile (fe
->name
, dir
);
18127 if (current_subfile
->symtab
== NULL
)
18129 current_subfile
->symtab
18130 = allocate_symtab (cust
, current_subfile
->name
);
18132 fe
->symtab
= current_subfile
->symtab
;
18137 /* Start a subfile for DWARF. FILENAME is the name of the file and
18138 DIRNAME the name of the source directory which contains FILENAME
18139 or NULL if not known.
18140 This routine tries to keep line numbers from identical absolute and
18141 relative file names in a common subfile.
18143 Using the `list' example from the GDB testsuite, which resides in
18144 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
18145 of /srcdir/list0.c yields the following debugging information for list0.c:
18147 DW_AT_name: /srcdir/list0.c
18148 DW_AT_comp_dir: /compdir
18149 files.files[0].name: list0.h
18150 files.files[0].dir: /srcdir
18151 files.files[1].name: list0.c
18152 files.files[1].dir: /srcdir
18154 The line number information for list0.c has to end up in a single
18155 subfile, so that `break /srcdir/list0.c:1' works as expected.
18156 start_subfile will ensure that this happens provided that we pass the
18157 concatenation of files.files[1].dir and files.files[1].name as the
18161 dwarf2_start_subfile (const char *filename
, const char *dirname
)
18165 /* In order not to lose the line information directory,
18166 we concatenate it to the filename when it makes sense.
18167 Note that the Dwarf3 standard says (speaking of filenames in line
18168 information): ``The directory index is ignored for file names
18169 that represent full path names''. Thus ignoring dirname in the
18170 `else' branch below isn't an issue. */
18172 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
18174 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
18178 start_subfile (filename
);
18184 /* Start a symtab for DWARF.
18185 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
18187 static struct compunit_symtab
*
18188 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
18189 const char *name
, const char *comp_dir
, CORE_ADDR low_pc
)
18191 struct compunit_symtab
*cust
18192 = start_symtab (cu
->objfile
, name
, comp_dir
, low_pc
);
18194 record_debugformat ("DWARF 2");
18195 record_producer (cu
->producer
);
18197 /* We assume that we're processing GCC output. */
18198 processing_gcc_compilation
= 2;
18200 cu
->processing_has_namespace_info
= 0;
18206 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
18207 struct dwarf2_cu
*cu
)
18209 struct objfile
*objfile
= cu
->objfile
;
18210 struct comp_unit_head
*cu_header
= &cu
->header
;
18212 /* NOTE drow/2003-01-30: There used to be a comment and some special
18213 code here to turn a symbol with DW_AT_external and a
18214 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
18215 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
18216 with some versions of binutils) where shared libraries could have
18217 relocations against symbols in their debug information - the
18218 minimal symbol would have the right address, but the debug info
18219 would not. It's no longer necessary, because we will explicitly
18220 apply relocations when we read in the debug information now. */
18222 /* A DW_AT_location attribute with no contents indicates that a
18223 variable has been optimized away. */
18224 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
18226 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
18230 /* Handle one degenerate form of location expression specially, to
18231 preserve GDB's previous behavior when section offsets are
18232 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
18233 then mark this symbol as LOC_STATIC. */
18235 if (attr_form_is_block (attr
)
18236 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
18237 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
18238 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
18239 && (DW_BLOCK (attr
)->size
18240 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
18242 unsigned int dummy
;
18244 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
18245 SYMBOL_VALUE_ADDRESS (sym
) =
18246 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
18248 SYMBOL_VALUE_ADDRESS (sym
) =
18249 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
18250 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
18251 fixup_symbol_section (sym
, objfile
);
18252 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
18253 SYMBOL_SECTION (sym
));
18257 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
18258 expression evaluator, and use LOC_COMPUTED only when necessary
18259 (i.e. when the value of a register or memory location is
18260 referenced, or a thread-local block, etc.). Then again, it might
18261 not be worthwhile. I'm assuming that it isn't unless performance
18262 or memory numbers show me otherwise. */
18264 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
18266 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
18267 cu
->has_loclist
= 1;
18270 /* Given a pointer to a DWARF information entry, figure out if we need
18271 to make a symbol table entry for it, and if so, create a new entry
18272 and return a pointer to it.
18273 If TYPE is NULL, determine symbol type from the die, otherwise
18274 used the passed type.
18275 If SPACE is not NULL, use it to hold the new symbol. If it is
18276 NULL, allocate a new symbol on the objfile's obstack. */
18278 static struct symbol
*
18279 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
18280 struct symbol
*space
)
18282 struct objfile
*objfile
= cu
->objfile
;
18283 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18284 struct symbol
*sym
= NULL
;
18286 struct attribute
*attr
= NULL
;
18287 struct attribute
*attr2
= NULL
;
18288 CORE_ADDR baseaddr
;
18289 struct pending
**list_to_add
= NULL
;
18291 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
18293 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
18295 name
= dwarf2_name (die
, cu
);
18298 const char *linkagename
;
18299 int suppress_add
= 0;
18304 sym
= allocate_symbol (objfile
);
18305 OBJSTAT (objfile
, n_syms
++);
18307 /* Cache this symbol's name and the name's demangled form (if any). */
18308 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
18309 linkagename
= dwarf2_physname (name
, die
, cu
);
18310 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
18312 /* Fortran does not have mangling standard and the mangling does differ
18313 between gfortran, iFort etc. */
18314 if (cu
->language
== language_fortran
18315 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
18316 symbol_set_demangled_name (&(sym
->ginfo
),
18317 dwarf2_full_name (name
, die
, cu
),
18320 /* Default assumptions.
18321 Use the passed type or decode it from the die. */
18322 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18323 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
18325 SYMBOL_TYPE (sym
) = type
;
18327 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
18328 attr
= dwarf2_attr (die
,
18329 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
18333 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
18336 attr
= dwarf2_attr (die
,
18337 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
18341 int file_index
= DW_UNSND (attr
);
18343 if (cu
->line_header
== NULL
18344 || file_index
> cu
->line_header
->num_file_names
)
18345 complaint (&symfile_complaints
,
18346 _("file index out of range"));
18347 else if (file_index
> 0)
18349 struct file_entry
*fe
;
18351 fe
= &cu
->line_header
->file_names
[file_index
- 1];
18352 symbol_set_symtab (sym
, fe
->symtab
);
18359 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
18364 addr
= attr_value_as_address (attr
);
18365 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
18366 SYMBOL_VALUE_ADDRESS (sym
) = addr
;
18368 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
18369 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
18370 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
18371 add_symbol_to_list (sym
, cu
->list_in_scope
);
18373 case DW_TAG_subprogram
:
18374 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
18376 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
18377 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18378 if ((attr2
&& (DW_UNSND (attr2
) != 0))
18379 || cu
->language
== language_ada
)
18381 /* Subprograms marked external are stored as a global symbol.
18382 Ada subprograms, whether marked external or not, are always
18383 stored as a global symbol, because we want to be able to
18384 access them globally. For instance, we want to be able
18385 to break on a nested subprogram without having to
18386 specify the context. */
18387 list_to_add
= &global_symbols
;
18391 list_to_add
= cu
->list_in_scope
;
18394 case DW_TAG_inlined_subroutine
:
18395 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
18397 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
18398 SYMBOL_INLINED (sym
) = 1;
18399 list_to_add
= cu
->list_in_scope
;
18401 case DW_TAG_template_value_param
:
18403 /* Fall through. */
18404 case DW_TAG_constant
:
18405 case DW_TAG_variable
:
18406 case DW_TAG_member
:
18407 /* Compilation with minimal debug info may result in
18408 variables with missing type entries. Change the
18409 misleading `void' type to something sensible. */
18410 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
18412 = objfile_type (objfile
)->nodebug_data_symbol
;
18414 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18415 /* In the case of DW_TAG_member, we should only be called for
18416 static const members. */
18417 if (die
->tag
== DW_TAG_member
)
18419 /* dwarf2_add_field uses die_is_declaration,
18420 so we do the same. */
18421 gdb_assert (die_is_declaration (die
, cu
));
18426 dwarf2_const_value (attr
, sym
, cu
);
18427 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18430 if (attr2
&& (DW_UNSND (attr2
) != 0))
18431 list_to_add
= &global_symbols
;
18433 list_to_add
= cu
->list_in_scope
;
18437 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
18440 var_decode_location (attr
, sym
, cu
);
18441 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18443 /* Fortran explicitly imports any global symbols to the local
18444 scope by DW_TAG_common_block. */
18445 if (cu
->language
== language_fortran
&& die
->parent
18446 && die
->parent
->tag
== DW_TAG_common_block
)
18449 if (SYMBOL_CLASS (sym
) == LOC_STATIC
18450 && SYMBOL_VALUE_ADDRESS (sym
) == 0
18451 && !dwarf2_per_objfile
->has_section_at_zero
)
18453 /* When a static variable is eliminated by the linker,
18454 the corresponding debug information is not stripped
18455 out, but the variable address is set to null;
18456 do not add such variables into symbol table. */
18458 else if (attr2
&& (DW_UNSND (attr2
) != 0))
18460 /* Workaround gfortran PR debug/40040 - it uses
18461 DW_AT_location for variables in -fPIC libraries which may
18462 get overriden by other libraries/executable and get
18463 a different address. Resolve it by the minimal symbol
18464 which may come from inferior's executable using copy
18465 relocation. Make this workaround only for gfortran as for
18466 other compilers GDB cannot guess the minimal symbol
18467 Fortran mangling kind. */
18468 if (cu
->language
== language_fortran
&& die
->parent
18469 && die
->parent
->tag
== DW_TAG_module
18471 && startswith (cu
->producer
, "GNU Fortran"))
18472 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
18474 /* A variable with DW_AT_external is never static,
18475 but it may be block-scoped. */
18476 list_to_add
= (cu
->list_in_scope
== &file_symbols
18477 ? &global_symbols
: cu
->list_in_scope
);
18480 list_to_add
= cu
->list_in_scope
;
18484 /* We do not know the address of this symbol.
18485 If it is an external symbol and we have type information
18486 for it, enter the symbol as a LOC_UNRESOLVED symbol.
18487 The address of the variable will then be determined from
18488 the minimal symbol table whenever the variable is
18490 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18492 /* Fortran explicitly imports any global symbols to the local
18493 scope by DW_TAG_common_block. */
18494 if (cu
->language
== language_fortran
&& die
->parent
18495 && die
->parent
->tag
== DW_TAG_common_block
)
18497 /* SYMBOL_CLASS doesn't matter here because
18498 read_common_block is going to reset it. */
18500 list_to_add
= cu
->list_in_scope
;
18502 else if (attr2
&& (DW_UNSND (attr2
) != 0)
18503 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
18505 /* A variable with DW_AT_external is never static, but it
18506 may be block-scoped. */
18507 list_to_add
= (cu
->list_in_scope
== &file_symbols
18508 ? &global_symbols
: cu
->list_in_scope
);
18510 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
18512 else if (!die_is_declaration (die
, cu
))
18514 /* Use the default LOC_OPTIMIZED_OUT class. */
18515 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
18517 list_to_add
= cu
->list_in_scope
;
18521 case DW_TAG_formal_parameter
:
18522 /* If we are inside a function, mark this as an argument. If
18523 not, we might be looking at an argument to an inlined function
18524 when we do not have enough information to show inlined frames;
18525 pretend it's a local variable in that case so that the user can
18527 if (context_stack_depth
> 0
18528 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
18529 SYMBOL_IS_ARGUMENT (sym
) = 1;
18530 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
18533 var_decode_location (attr
, sym
, cu
);
18535 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18538 dwarf2_const_value (attr
, sym
, cu
);
18541 list_to_add
= cu
->list_in_scope
;
18543 case DW_TAG_unspecified_parameters
:
18544 /* From varargs functions; gdb doesn't seem to have any
18545 interest in this information, so just ignore it for now.
18548 case DW_TAG_template_type_param
:
18550 /* Fall through. */
18551 case DW_TAG_class_type
:
18552 case DW_TAG_interface_type
:
18553 case DW_TAG_structure_type
:
18554 case DW_TAG_union_type
:
18555 case DW_TAG_set_type
:
18556 case DW_TAG_enumeration_type
:
18557 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18558 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
18561 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
18562 really ever be static objects: otherwise, if you try
18563 to, say, break of a class's method and you're in a file
18564 which doesn't mention that class, it won't work unless
18565 the check for all static symbols in lookup_symbol_aux
18566 saves you. See the OtherFileClass tests in
18567 gdb.c++/namespace.exp. */
18571 list_to_add
= (cu
->list_in_scope
== &file_symbols
18572 && cu
->language
== language_cplus
18573 ? &global_symbols
: cu
->list_in_scope
);
18575 /* The semantics of C++ state that "struct foo {
18576 ... }" also defines a typedef for "foo". */
18577 if (cu
->language
== language_cplus
18578 || cu
->language
== language_ada
18579 || cu
->language
== language_d
18580 || cu
->language
== language_rust
)
18582 /* The symbol's name is already allocated along
18583 with this objfile, so we don't need to
18584 duplicate it for the type. */
18585 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
18586 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
18591 case DW_TAG_typedef
:
18592 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18593 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18594 list_to_add
= cu
->list_in_scope
;
18596 case DW_TAG_base_type
:
18597 case DW_TAG_subrange_type
:
18598 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18599 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18600 list_to_add
= cu
->list_in_scope
;
18602 case DW_TAG_enumerator
:
18603 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18606 dwarf2_const_value (attr
, sym
, cu
);
18609 /* NOTE: carlton/2003-11-10: See comment above in the
18610 DW_TAG_class_type, etc. block. */
18612 list_to_add
= (cu
->list_in_scope
== &file_symbols
18613 && cu
->language
== language_cplus
18614 ? &global_symbols
: cu
->list_in_scope
);
18617 case DW_TAG_imported_declaration
:
18618 case DW_TAG_namespace
:
18619 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18620 list_to_add
= &global_symbols
;
18622 case DW_TAG_module
:
18623 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18624 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
18625 list_to_add
= &global_symbols
;
18627 case DW_TAG_common_block
:
18628 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
18629 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
18630 add_symbol_to_list (sym
, cu
->list_in_scope
);
18633 /* Not a tag we recognize. Hopefully we aren't processing
18634 trash data, but since we must specifically ignore things
18635 we don't recognize, there is nothing else we should do at
18637 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
18638 dwarf_tag_name (die
->tag
));
18644 sym
->hash_next
= objfile
->template_symbols
;
18645 objfile
->template_symbols
= sym
;
18646 list_to_add
= NULL
;
18649 if (list_to_add
!= NULL
)
18650 add_symbol_to_list (sym
, list_to_add
);
18652 /* For the benefit of old versions of GCC, check for anonymous
18653 namespaces based on the demangled name. */
18654 if (!cu
->processing_has_namespace_info
18655 && cu
->language
== language_cplus
)
18656 cp_scan_for_anonymous_namespaces (sym
, objfile
);
18661 /* A wrapper for new_symbol_full that always allocates a new symbol. */
18663 static struct symbol
*
18664 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
18666 return new_symbol_full (die
, type
, cu
, NULL
);
18669 /* Given an attr with a DW_FORM_dataN value in host byte order,
18670 zero-extend it as appropriate for the symbol's type. The DWARF
18671 standard (v4) is not entirely clear about the meaning of using
18672 DW_FORM_dataN for a constant with a signed type, where the type is
18673 wider than the data. The conclusion of a discussion on the DWARF
18674 list was that this is unspecified. We choose to always zero-extend
18675 because that is the interpretation long in use by GCC. */
18678 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
18679 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
18681 struct objfile
*objfile
= cu
->objfile
;
18682 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
18683 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
18684 LONGEST l
= DW_UNSND (attr
);
18686 if (bits
< sizeof (*value
) * 8)
18688 l
&= ((LONGEST
) 1 << bits
) - 1;
18691 else if (bits
== sizeof (*value
) * 8)
18695 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
18696 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
18703 /* Read a constant value from an attribute. Either set *VALUE, or if
18704 the value does not fit in *VALUE, set *BYTES - either already
18705 allocated on the objfile obstack, or newly allocated on OBSTACK,
18706 or, set *BATON, if we translated the constant to a location
18710 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
18711 const char *name
, struct obstack
*obstack
,
18712 struct dwarf2_cu
*cu
,
18713 LONGEST
*value
, const gdb_byte
**bytes
,
18714 struct dwarf2_locexpr_baton
**baton
)
18716 struct objfile
*objfile
= cu
->objfile
;
18717 struct comp_unit_head
*cu_header
= &cu
->header
;
18718 struct dwarf_block
*blk
;
18719 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
18720 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
18726 switch (attr
->form
)
18729 case DW_FORM_GNU_addr_index
:
18733 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
18734 dwarf2_const_value_length_mismatch_complaint (name
,
18735 cu_header
->addr_size
,
18736 TYPE_LENGTH (type
));
18737 /* Symbols of this form are reasonably rare, so we just
18738 piggyback on the existing location code rather than writing
18739 a new implementation of symbol_computed_ops. */
18740 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
18741 (*baton
)->per_cu
= cu
->per_cu
;
18742 gdb_assert ((*baton
)->per_cu
);
18744 (*baton
)->size
= 2 + cu_header
->addr_size
;
18745 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
18746 (*baton
)->data
= data
;
18748 data
[0] = DW_OP_addr
;
18749 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
18750 byte_order
, DW_ADDR (attr
));
18751 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
18754 case DW_FORM_string
:
18756 case DW_FORM_GNU_str_index
:
18757 case DW_FORM_GNU_strp_alt
:
18758 /* DW_STRING is already allocated on the objfile obstack, point
18760 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
18762 case DW_FORM_block1
:
18763 case DW_FORM_block2
:
18764 case DW_FORM_block4
:
18765 case DW_FORM_block
:
18766 case DW_FORM_exprloc
:
18767 blk
= DW_BLOCK (attr
);
18768 if (TYPE_LENGTH (type
) != blk
->size
)
18769 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
18770 TYPE_LENGTH (type
));
18771 *bytes
= blk
->data
;
18774 /* The DW_AT_const_value attributes are supposed to carry the
18775 symbol's value "represented as it would be on the target
18776 architecture." By the time we get here, it's already been
18777 converted to host endianness, so we just need to sign- or
18778 zero-extend it as appropriate. */
18779 case DW_FORM_data1
:
18780 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
18782 case DW_FORM_data2
:
18783 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
18785 case DW_FORM_data4
:
18786 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
18788 case DW_FORM_data8
:
18789 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
18792 case DW_FORM_sdata
:
18793 *value
= DW_SND (attr
);
18796 case DW_FORM_udata
:
18797 *value
= DW_UNSND (attr
);
18801 complaint (&symfile_complaints
,
18802 _("unsupported const value attribute form: '%s'"),
18803 dwarf_form_name (attr
->form
));
18810 /* Copy constant value from an attribute to a symbol. */
18813 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
18814 struct dwarf2_cu
*cu
)
18816 struct objfile
*objfile
= cu
->objfile
;
18818 const gdb_byte
*bytes
;
18819 struct dwarf2_locexpr_baton
*baton
;
18821 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
18822 SYMBOL_PRINT_NAME (sym
),
18823 &objfile
->objfile_obstack
, cu
,
18824 &value
, &bytes
, &baton
);
18828 SYMBOL_LOCATION_BATON (sym
) = baton
;
18829 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
18831 else if (bytes
!= NULL
)
18833 SYMBOL_VALUE_BYTES (sym
) = bytes
;
18834 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
18838 SYMBOL_VALUE (sym
) = value
;
18839 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
18843 /* Return the type of the die in question using its DW_AT_type attribute. */
18845 static struct type
*
18846 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18848 struct attribute
*type_attr
;
18850 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
18853 /* A missing DW_AT_type represents a void type. */
18854 return objfile_type (cu
->objfile
)->builtin_void
;
18857 return lookup_die_type (die
, type_attr
, cu
);
18860 /* True iff CU's producer generates GNAT Ada auxiliary information
18861 that allows to find parallel types through that information instead
18862 of having to do expensive parallel lookups by type name. */
18865 need_gnat_info (struct dwarf2_cu
*cu
)
18867 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
18868 of GNAT produces this auxiliary information, without any indication
18869 that it is produced. Part of enhancing the FSF version of GNAT
18870 to produce that information will be to put in place an indicator
18871 that we can use in order to determine whether the descriptive type
18872 info is available or not. One suggestion that has been made is
18873 to use a new attribute, attached to the CU die. For now, assume
18874 that the descriptive type info is not available. */
18878 /* Return the auxiliary type of the die in question using its
18879 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
18880 attribute is not present. */
18882 static struct type
*
18883 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18885 struct attribute
*type_attr
;
18887 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
18891 return lookup_die_type (die
, type_attr
, cu
);
18894 /* If DIE has a descriptive_type attribute, then set the TYPE's
18895 descriptive type accordingly. */
18898 set_descriptive_type (struct type
*type
, struct die_info
*die
,
18899 struct dwarf2_cu
*cu
)
18901 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
18903 if (descriptive_type
)
18905 ALLOCATE_GNAT_AUX_TYPE (type
);
18906 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
18910 /* Return the containing type of the die in question using its
18911 DW_AT_containing_type attribute. */
18913 static struct type
*
18914 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18916 struct attribute
*type_attr
;
18918 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
18920 error (_("Dwarf Error: Problem turning containing type into gdb type "
18921 "[in module %s]"), objfile_name (cu
->objfile
));
18923 return lookup_die_type (die
, type_attr
, cu
);
18926 /* Return an error marker type to use for the ill formed type in DIE/CU. */
18928 static struct type
*
18929 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
18931 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18932 char *message
, *saved
;
18934 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
18935 objfile_name (objfile
),
18936 cu
->header
.offset
.sect_off
,
18937 die
->offset
.sect_off
);
18938 saved
= (char *) obstack_copy0 (&objfile
->objfile_obstack
,
18939 message
, strlen (message
));
18942 return init_type (objfile
, TYPE_CODE_ERROR
, 0, saved
);
18945 /* Look up the type of DIE in CU using its type attribute ATTR.
18946 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
18947 DW_AT_containing_type.
18948 If there is no type substitute an error marker. */
18950 static struct type
*
18951 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
18952 struct dwarf2_cu
*cu
)
18954 struct objfile
*objfile
= cu
->objfile
;
18955 struct type
*this_type
;
18957 gdb_assert (attr
->name
== DW_AT_type
18958 || attr
->name
== DW_AT_GNAT_descriptive_type
18959 || attr
->name
== DW_AT_containing_type
);
18961 /* First see if we have it cached. */
18963 if (attr
->form
== DW_FORM_GNU_ref_alt
)
18965 struct dwarf2_per_cu_data
*per_cu
;
18966 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
18968 per_cu
= dwarf2_find_containing_comp_unit (offset
, 1, cu
->objfile
);
18969 this_type
= get_die_type_at_offset (offset
, per_cu
);
18971 else if (attr_form_is_ref (attr
))
18973 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
18975 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
18977 else if (attr
->form
== DW_FORM_ref_sig8
)
18979 ULONGEST signature
= DW_SIGNATURE (attr
);
18981 return get_signatured_type (die
, signature
, cu
);
18985 complaint (&symfile_complaints
,
18986 _("Dwarf Error: Bad type attribute %s in DIE"
18987 " at 0x%x [in module %s]"),
18988 dwarf_attr_name (attr
->name
), die
->offset
.sect_off
,
18989 objfile_name (objfile
));
18990 return build_error_marker_type (cu
, die
);
18993 /* If not cached we need to read it in. */
18995 if (this_type
== NULL
)
18997 struct die_info
*type_die
= NULL
;
18998 struct dwarf2_cu
*type_cu
= cu
;
19000 if (attr_form_is_ref (attr
))
19001 type_die
= follow_die_ref (die
, attr
, &type_cu
);
19002 if (type_die
== NULL
)
19003 return build_error_marker_type (cu
, die
);
19004 /* If we find the type now, it's probably because the type came
19005 from an inter-CU reference and the type's CU got expanded before
19007 this_type
= read_type_die (type_die
, type_cu
);
19010 /* If we still don't have a type use an error marker. */
19012 if (this_type
== NULL
)
19013 return build_error_marker_type (cu
, die
);
19018 /* Return the type in DIE, CU.
19019 Returns NULL for invalid types.
19021 This first does a lookup in die_type_hash,
19022 and only reads the die in if necessary.
19024 NOTE: This can be called when reading in partial or full symbols. */
19026 static struct type
*
19027 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
19029 struct type
*this_type
;
19031 this_type
= get_die_type (die
, cu
);
19035 return read_type_die_1 (die
, cu
);
19038 /* Read the type in DIE, CU.
19039 Returns NULL for invalid types. */
19041 static struct type
*
19042 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
19044 struct type
*this_type
= NULL
;
19048 case DW_TAG_class_type
:
19049 case DW_TAG_interface_type
:
19050 case DW_TAG_structure_type
:
19051 case DW_TAG_union_type
:
19052 this_type
= read_structure_type (die
, cu
);
19054 case DW_TAG_enumeration_type
:
19055 this_type
= read_enumeration_type (die
, cu
);
19057 case DW_TAG_subprogram
:
19058 case DW_TAG_subroutine_type
:
19059 case DW_TAG_inlined_subroutine
:
19060 this_type
= read_subroutine_type (die
, cu
);
19062 case DW_TAG_array_type
:
19063 this_type
= read_array_type (die
, cu
);
19065 case DW_TAG_set_type
:
19066 this_type
= read_set_type (die
, cu
);
19068 case DW_TAG_pointer_type
:
19069 this_type
= read_tag_pointer_type (die
, cu
);
19071 case DW_TAG_ptr_to_member_type
:
19072 this_type
= read_tag_ptr_to_member_type (die
, cu
);
19074 case DW_TAG_reference_type
:
19075 this_type
= read_tag_reference_type (die
, cu
);
19077 case DW_TAG_const_type
:
19078 this_type
= read_tag_const_type (die
, cu
);
19080 case DW_TAG_volatile_type
:
19081 this_type
= read_tag_volatile_type (die
, cu
);
19083 case DW_TAG_restrict_type
:
19084 this_type
= read_tag_restrict_type (die
, cu
);
19086 case DW_TAG_string_type
:
19087 this_type
= read_tag_string_type (die
, cu
);
19089 case DW_TAG_typedef
:
19090 this_type
= read_typedef (die
, cu
);
19092 case DW_TAG_subrange_type
:
19093 this_type
= read_subrange_type (die
, cu
);
19095 case DW_TAG_base_type
:
19096 this_type
= read_base_type (die
, cu
);
19098 case DW_TAG_unspecified_type
:
19099 this_type
= read_unspecified_type (die
, cu
);
19101 case DW_TAG_namespace
:
19102 this_type
= read_namespace_type (die
, cu
);
19104 case DW_TAG_module
:
19105 this_type
= read_module_type (die
, cu
);
19107 case DW_TAG_atomic_type
:
19108 this_type
= read_tag_atomic_type (die
, cu
);
19111 complaint (&symfile_complaints
,
19112 _("unexpected tag in read_type_die: '%s'"),
19113 dwarf_tag_name (die
->tag
));
19120 /* See if we can figure out if the class lives in a namespace. We do
19121 this by looking for a member function; its demangled name will
19122 contain namespace info, if there is any.
19123 Return the computed name or NULL.
19124 Space for the result is allocated on the objfile's obstack.
19125 This is the full-die version of guess_partial_die_structure_name.
19126 In this case we know DIE has no useful parent. */
19129 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19131 struct die_info
*spec_die
;
19132 struct dwarf2_cu
*spec_cu
;
19133 struct die_info
*child
;
19136 spec_die
= die_specification (die
, &spec_cu
);
19137 if (spec_die
!= NULL
)
19143 for (child
= die
->child
;
19145 child
= child
->sibling
)
19147 if (child
->tag
== DW_TAG_subprogram
)
19149 const char *linkage_name
;
19151 linkage_name
= dwarf2_string_attr (child
, DW_AT_linkage_name
, cu
);
19152 if (linkage_name
== NULL
)
19153 linkage_name
= dwarf2_string_attr (child
, DW_AT_MIPS_linkage_name
,
19155 if (linkage_name
!= NULL
)
19158 = language_class_name_from_physname (cu
->language_defn
,
19162 if (actual_name
!= NULL
)
19164 const char *die_name
= dwarf2_name (die
, cu
);
19166 if (die_name
!= NULL
19167 && strcmp (die_name
, actual_name
) != 0)
19169 /* Strip off the class name from the full name.
19170 We want the prefix. */
19171 int die_name_len
= strlen (die_name
);
19172 int actual_name_len
= strlen (actual_name
);
19174 /* Test for '::' as a sanity check. */
19175 if (actual_name_len
> die_name_len
+ 2
19176 && actual_name
[actual_name_len
19177 - die_name_len
- 1] == ':')
19178 name
= (char *) obstack_copy0 (
19179 &cu
->objfile
->per_bfd
->storage_obstack
,
19180 actual_name
, actual_name_len
- die_name_len
- 2);
19183 xfree (actual_name
);
19192 /* GCC might emit a nameless typedef that has a linkage name. Determine the
19193 prefix part in such case. See
19194 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
19197 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
19199 struct attribute
*attr
;
19202 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
19203 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
19206 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
19209 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
19211 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
19212 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
19215 /* dwarf2_name had to be already called. */
19216 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
19218 /* Strip the base name, keep any leading namespaces/classes. */
19219 base
= strrchr (DW_STRING (attr
), ':');
19220 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
19223 return (char *) obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
19225 &base
[-1] - DW_STRING (attr
));
19228 /* Return the name of the namespace/class that DIE is defined within,
19229 or "" if we can't tell. The caller should not xfree the result.
19231 For example, if we're within the method foo() in the following
19241 then determine_prefix on foo's die will return "N::C". */
19243 static const char *
19244 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
19246 struct die_info
*parent
, *spec_die
;
19247 struct dwarf2_cu
*spec_cu
;
19248 struct type
*parent_type
;
19251 if (cu
->language
!= language_cplus
19252 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
19253 && cu
->language
!= language_rust
)
19256 retval
= anonymous_struct_prefix (die
, cu
);
19260 /* We have to be careful in the presence of DW_AT_specification.
19261 For example, with GCC 3.4, given the code
19265 // Definition of N::foo.
19269 then we'll have a tree of DIEs like this:
19271 1: DW_TAG_compile_unit
19272 2: DW_TAG_namespace // N
19273 3: DW_TAG_subprogram // declaration of N::foo
19274 4: DW_TAG_subprogram // definition of N::foo
19275 DW_AT_specification // refers to die #3
19277 Thus, when processing die #4, we have to pretend that we're in
19278 the context of its DW_AT_specification, namely the contex of die
19281 spec_die
= die_specification (die
, &spec_cu
);
19282 if (spec_die
== NULL
)
19283 parent
= die
->parent
;
19286 parent
= spec_die
->parent
;
19290 if (parent
== NULL
)
19292 else if (parent
->building_fullname
)
19295 const char *parent_name
;
19297 /* It has been seen on RealView 2.2 built binaries,
19298 DW_TAG_template_type_param types actually _defined_ as
19299 children of the parent class:
19302 template class <class Enum> Class{};
19303 Class<enum E> class_e;
19305 1: DW_TAG_class_type (Class)
19306 2: DW_TAG_enumeration_type (E)
19307 3: DW_TAG_enumerator (enum1:0)
19308 3: DW_TAG_enumerator (enum2:1)
19310 2: DW_TAG_template_type_param
19311 DW_AT_type DW_FORM_ref_udata (E)
19313 Besides being broken debug info, it can put GDB into an
19314 infinite loop. Consider:
19316 When we're building the full name for Class<E>, we'll start
19317 at Class, and go look over its template type parameters,
19318 finding E. We'll then try to build the full name of E, and
19319 reach here. We're now trying to build the full name of E,
19320 and look over the parent DIE for containing scope. In the
19321 broken case, if we followed the parent DIE of E, we'd again
19322 find Class, and once again go look at its template type
19323 arguments, etc., etc. Simply don't consider such parent die
19324 as source-level parent of this die (it can't be, the language
19325 doesn't allow it), and break the loop here. */
19326 name
= dwarf2_name (die
, cu
);
19327 parent_name
= dwarf2_name (parent
, cu
);
19328 complaint (&symfile_complaints
,
19329 _("template param type '%s' defined within parent '%s'"),
19330 name
? name
: "<unknown>",
19331 parent_name
? parent_name
: "<unknown>");
19335 switch (parent
->tag
)
19337 case DW_TAG_namespace
:
19338 parent_type
= read_type_die (parent
, cu
);
19339 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
19340 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
19341 Work around this problem here. */
19342 if (cu
->language
== language_cplus
19343 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
19345 /* We give a name to even anonymous namespaces. */
19346 return TYPE_TAG_NAME (parent_type
);
19347 case DW_TAG_class_type
:
19348 case DW_TAG_interface_type
:
19349 case DW_TAG_structure_type
:
19350 case DW_TAG_union_type
:
19351 case DW_TAG_module
:
19352 parent_type
= read_type_die (parent
, cu
);
19353 if (TYPE_TAG_NAME (parent_type
) != NULL
)
19354 return TYPE_TAG_NAME (parent_type
);
19356 /* An anonymous structure is only allowed non-static data
19357 members; no typedefs, no member functions, et cetera.
19358 So it does not need a prefix. */
19360 case DW_TAG_compile_unit
:
19361 case DW_TAG_partial_unit
:
19362 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
19363 if (cu
->language
== language_cplus
19364 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
19365 && die
->child
!= NULL
19366 && (die
->tag
== DW_TAG_class_type
19367 || die
->tag
== DW_TAG_structure_type
19368 || die
->tag
== DW_TAG_union_type
))
19370 char *name
= guess_full_die_structure_name (die
, cu
);
19375 case DW_TAG_enumeration_type
:
19376 parent_type
= read_type_die (parent
, cu
);
19377 if (TYPE_DECLARED_CLASS (parent_type
))
19379 if (TYPE_TAG_NAME (parent_type
) != NULL
)
19380 return TYPE_TAG_NAME (parent_type
);
19383 /* Fall through. */
19385 return determine_prefix (parent
, cu
);
19389 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
19390 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
19391 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
19392 an obconcat, otherwise allocate storage for the result. The CU argument is
19393 used to determine the language and hence, the appropriate separator. */
19395 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
19398 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
19399 int physname
, struct dwarf2_cu
*cu
)
19401 const char *lead
= "";
19404 if (suffix
== NULL
|| suffix
[0] == '\0'
19405 || prefix
== NULL
|| prefix
[0] == '\0')
19407 else if (cu
->language
== language_d
)
19409 /* For D, the 'main' function could be defined in any module, but it
19410 should never be prefixed. */
19411 if (strcmp (suffix
, "D main") == 0)
19419 else if (cu
->language
== language_fortran
&& physname
)
19421 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
19422 DW_AT_MIPS_linkage_name is preferred and used instead. */
19430 if (prefix
== NULL
)
19432 if (suffix
== NULL
)
19439 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
19441 strcpy (retval
, lead
);
19442 strcat (retval
, prefix
);
19443 strcat (retval
, sep
);
19444 strcat (retval
, suffix
);
19449 /* We have an obstack. */
19450 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
19454 /* Return sibling of die, NULL if no sibling. */
19456 static struct die_info
*
19457 sibling_die (struct die_info
*die
)
19459 return die
->sibling
;
19462 /* Get name of a die, return NULL if not found. */
19464 static const char *
19465 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
19466 struct obstack
*obstack
)
19468 if (name
&& cu
->language
== language_cplus
)
19470 std::string canon_name
= cp_canonicalize_string (name
);
19472 if (!canon_name
.empty ())
19474 if (canon_name
!= name
)
19475 name
= (const char *) obstack_copy0 (obstack
,
19476 canon_name
.c_str (),
19477 canon_name
.length ());
19484 /* Get name of a die, return NULL if not found.
19485 Anonymous namespaces are converted to their magic string. */
19487 static const char *
19488 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19490 struct attribute
*attr
;
19492 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
19493 if ((!attr
|| !DW_STRING (attr
))
19494 && die
->tag
!= DW_TAG_namespace
19495 && die
->tag
!= DW_TAG_class_type
19496 && die
->tag
!= DW_TAG_interface_type
19497 && die
->tag
!= DW_TAG_structure_type
19498 && die
->tag
!= DW_TAG_union_type
)
19503 case DW_TAG_compile_unit
:
19504 case DW_TAG_partial_unit
:
19505 /* Compilation units have a DW_AT_name that is a filename, not
19506 a source language identifier. */
19507 case DW_TAG_enumeration_type
:
19508 case DW_TAG_enumerator
:
19509 /* These tags always have simple identifiers already; no need
19510 to canonicalize them. */
19511 return DW_STRING (attr
);
19513 case DW_TAG_namespace
:
19514 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
19515 return DW_STRING (attr
);
19516 return CP_ANONYMOUS_NAMESPACE_STR
;
19518 case DW_TAG_class_type
:
19519 case DW_TAG_interface_type
:
19520 case DW_TAG_structure_type
:
19521 case DW_TAG_union_type
:
19522 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
19523 structures or unions. These were of the form "._%d" in GCC 4.1,
19524 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
19525 and GCC 4.4. We work around this problem by ignoring these. */
19526 if (attr
&& DW_STRING (attr
)
19527 && (startswith (DW_STRING (attr
), "._")
19528 || startswith (DW_STRING (attr
), "<anonymous")))
19531 /* GCC might emit a nameless typedef that has a linkage name. See
19532 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
19533 if (!attr
|| DW_STRING (attr
) == NULL
)
19535 char *demangled
= NULL
;
19537 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
19539 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
19541 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
19544 /* Avoid demangling DW_STRING (attr) the second time on a second
19545 call for the same DIE. */
19546 if (!DW_STRING_IS_CANONICAL (attr
))
19547 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
19553 /* FIXME: we already did this for the partial symbol... */
19556 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
19557 demangled
, strlen (demangled
)));
19558 DW_STRING_IS_CANONICAL (attr
) = 1;
19561 /* Strip any leading namespaces/classes, keep only the base name.
19562 DW_AT_name for named DIEs does not contain the prefixes. */
19563 base
= strrchr (DW_STRING (attr
), ':');
19564 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
19567 return DW_STRING (attr
);
19576 if (!DW_STRING_IS_CANONICAL (attr
))
19579 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
19580 &cu
->objfile
->per_bfd
->storage_obstack
);
19581 DW_STRING_IS_CANONICAL (attr
) = 1;
19583 return DW_STRING (attr
);
19586 /* Return the die that this die in an extension of, or NULL if there
19587 is none. *EXT_CU is the CU containing DIE on input, and the CU
19588 containing the return value on output. */
19590 static struct die_info
*
19591 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
19593 struct attribute
*attr
;
19595 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
19599 return follow_die_ref (die
, attr
, ext_cu
);
19602 /* Convert a DIE tag into its string name. */
19604 static const char *
19605 dwarf_tag_name (unsigned tag
)
19607 const char *name
= get_DW_TAG_name (tag
);
19610 return "DW_TAG_<unknown>";
19615 /* Convert a DWARF attribute code into its string name. */
19617 static const char *
19618 dwarf_attr_name (unsigned attr
)
19622 #ifdef MIPS /* collides with DW_AT_HP_block_index */
19623 if (attr
== DW_AT_MIPS_fde
)
19624 return "DW_AT_MIPS_fde";
19626 if (attr
== DW_AT_HP_block_index
)
19627 return "DW_AT_HP_block_index";
19630 name
= get_DW_AT_name (attr
);
19633 return "DW_AT_<unknown>";
19638 /* Convert a DWARF value form code into its string name. */
19640 static const char *
19641 dwarf_form_name (unsigned form
)
19643 const char *name
= get_DW_FORM_name (form
);
19646 return "DW_FORM_<unknown>";
19652 dwarf_bool_name (unsigned mybool
)
19660 /* Convert a DWARF type code into its string name. */
19662 static const char *
19663 dwarf_type_encoding_name (unsigned enc
)
19665 const char *name
= get_DW_ATE_name (enc
);
19668 return "DW_ATE_<unknown>";
19674 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
19678 print_spaces (indent
, f
);
19679 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
19680 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
.sect_off
);
19682 if (die
->parent
!= NULL
)
19684 print_spaces (indent
, f
);
19685 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
19686 die
->parent
->offset
.sect_off
);
19689 print_spaces (indent
, f
);
19690 fprintf_unfiltered (f
, " has children: %s\n",
19691 dwarf_bool_name (die
->child
!= NULL
));
19693 print_spaces (indent
, f
);
19694 fprintf_unfiltered (f
, " attributes:\n");
19696 for (i
= 0; i
< die
->num_attrs
; ++i
)
19698 print_spaces (indent
, f
);
19699 fprintf_unfiltered (f
, " %s (%s) ",
19700 dwarf_attr_name (die
->attrs
[i
].name
),
19701 dwarf_form_name (die
->attrs
[i
].form
));
19703 switch (die
->attrs
[i
].form
)
19706 case DW_FORM_GNU_addr_index
:
19707 fprintf_unfiltered (f
, "address: ");
19708 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
19710 case DW_FORM_block2
:
19711 case DW_FORM_block4
:
19712 case DW_FORM_block
:
19713 case DW_FORM_block1
:
19714 fprintf_unfiltered (f
, "block: size %s",
19715 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
19717 case DW_FORM_exprloc
:
19718 fprintf_unfiltered (f
, "expression: size %s",
19719 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
19721 case DW_FORM_ref_addr
:
19722 fprintf_unfiltered (f
, "ref address: ");
19723 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
19725 case DW_FORM_GNU_ref_alt
:
19726 fprintf_unfiltered (f
, "alt ref address: ");
19727 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
19733 case DW_FORM_ref_udata
:
19734 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
19735 (long) (DW_UNSND (&die
->attrs
[i
])));
19737 case DW_FORM_data1
:
19738 case DW_FORM_data2
:
19739 case DW_FORM_data4
:
19740 case DW_FORM_data8
:
19741 case DW_FORM_udata
:
19742 case DW_FORM_sdata
:
19743 fprintf_unfiltered (f
, "constant: %s",
19744 pulongest (DW_UNSND (&die
->attrs
[i
])));
19746 case DW_FORM_sec_offset
:
19747 fprintf_unfiltered (f
, "section offset: %s",
19748 pulongest (DW_UNSND (&die
->attrs
[i
])));
19750 case DW_FORM_ref_sig8
:
19751 fprintf_unfiltered (f
, "signature: %s",
19752 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
19754 case DW_FORM_string
:
19756 case DW_FORM_GNU_str_index
:
19757 case DW_FORM_GNU_strp_alt
:
19758 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
19759 DW_STRING (&die
->attrs
[i
])
19760 ? DW_STRING (&die
->attrs
[i
]) : "",
19761 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
19764 if (DW_UNSND (&die
->attrs
[i
]))
19765 fprintf_unfiltered (f
, "flag: TRUE");
19767 fprintf_unfiltered (f
, "flag: FALSE");
19769 case DW_FORM_flag_present
:
19770 fprintf_unfiltered (f
, "flag: TRUE");
19772 case DW_FORM_indirect
:
19773 /* The reader will have reduced the indirect form to
19774 the "base form" so this form should not occur. */
19775 fprintf_unfiltered (f
,
19776 "unexpected attribute form: DW_FORM_indirect");
19779 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
19780 die
->attrs
[i
].form
);
19783 fprintf_unfiltered (f
, "\n");
19788 dump_die_for_error (struct die_info
*die
)
19790 dump_die_shallow (gdb_stderr
, 0, die
);
19794 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
19796 int indent
= level
* 4;
19798 gdb_assert (die
!= NULL
);
19800 if (level
>= max_level
)
19803 dump_die_shallow (f
, indent
, die
);
19805 if (die
->child
!= NULL
)
19807 print_spaces (indent
, f
);
19808 fprintf_unfiltered (f
, " Children:");
19809 if (level
+ 1 < max_level
)
19811 fprintf_unfiltered (f
, "\n");
19812 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
19816 fprintf_unfiltered (f
,
19817 " [not printed, max nesting level reached]\n");
19821 if (die
->sibling
!= NULL
&& level
> 0)
19823 dump_die_1 (f
, level
, max_level
, die
->sibling
);
19827 /* This is called from the pdie macro in gdbinit.in.
19828 It's not static so gcc will keep a copy callable from gdb. */
19831 dump_die (struct die_info
*die
, int max_level
)
19833 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
19837 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
19841 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
.sect_off
,
19847 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
19851 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
19853 sect_offset retval
= { DW_UNSND (attr
) };
19855 if (attr_form_is_ref (attr
))
19858 retval
.sect_off
= 0;
19859 complaint (&symfile_complaints
,
19860 _("unsupported die ref attribute form: '%s'"),
19861 dwarf_form_name (attr
->form
));
19865 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
19866 * the value held by the attribute is not constant. */
19869 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
19871 if (attr
->form
== DW_FORM_sdata
)
19872 return DW_SND (attr
);
19873 else if (attr
->form
== DW_FORM_udata
19874 || attr
->form
== DW_FORM_data1
19875 || attr
->form
== DW_FORM_data2
19876 || attr
->form
== DW_FORM_data4
19877 || attr
->form
== DW_FORM_data8
)
19878 return DW_UNSND (attr
);
19881 complaint (&symfile_complaints
,
19882 _("Attribute value is not a constant (%s)"),
19883 dwarf_form_name (attr
->form
));
19884 return default_value
;
19888 /* Follow reference or signature attribute ATTR of SRC_DIE.
19889 On entry *REF_CU is the CU of SRC_DIE.
19890 On exit *REF_CU is the CU of the result. */
19892 static struct die_info
*
19893 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
19894 struct dwarf2_cu
**ref_cu
)
19896 struct die_info
*die
;
19898 if (attr_form_is_ref (attr
))
19899 die
= follow_die_ref (src_die
, attr
, ref_cu
);
19900 else if (attr
->form
== DW_FORM_ref_sig8
)
19901 die
= follow_die_sig (src_die
, attr
, ref_cu
);
19904 dump_die_for_error (src_die
);
19905 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
19906 objfile_name ((*ref_cu
)->objfile
));
19912 /* Follow reference OFFSET.
19913 On entry *REF_CU is the CU of the source die referencing OFFSET.
19914 On exit *REF_CU is the CU of the result.
19915 Returns NULL if OFFSET is invalid. */
19917 static struct die_info
*
19918 follow_die_offset (sect_offset offset
, int offset_in_dwz
,
19919 struct dwarf2_cu
**ref_cu
)
19921 struct die_info temp_die
;
19922 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
19924 gdb_assert (cu
->per_cu
!= NULL
);
19928 if (cu
->per_cu
->is_debug_types
)
19930 /* .debug_types CUs cannot reference anything outside their CU.
19931 If they need to, they have to reference a signatured type via
19932 DW_FORM_ref_sig8. */
19933 if (! offset_in_cu_p (&cu
->header
, offset
))
19936 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
19937 || ! offset_in_cu_p (&cu
->header
, offset
))
19939 struct dwarf2_per_cu_data
*per_cu
;
19941 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
19944 /* If necessary, add it to the queue and load its DIEs. */
19945 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
19946 load_full_comp_unit (per_cu
, cu
->language
);
19948 target_cu
= per_cu
->cu
;
19950 else if (cu
->dies
== NULL
)
19952 /* We're loading full DIEs during partial symbol reading. */
19953 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
19954 load_full_comp_unit (cu
->per_cu
, language_minimal
);
19957 *ref_cu
= target_cu
;
19958 temp_die
.offset
= offset
;
19959 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
19960 &temp_die
, offset
.sect_off
);
19963 /* Follow reference attribute ATTR of SRC_DIE.
19964 On entry *REF_CU is the CU of SRC_DIE.
19965 On exit *REF_CU is the CU of the result. */
19967 static struct die_info
*
19968 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
19969 struct dwarf2_cu
**ref_cu
)
19971 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
19972 struct dwarf2_cu
*cu
= *ref_cu
;
19973 struct die_info
*die
;
19975 die
= follow_die_offset (offset
,
19976 (attr
->form
== DW_FORM_GNU_ref_alt
19977 || cu
->per_cu
->is_dwz
),
19980 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
19981 "at 0x%x [in module %s]"),
19982 offset
.sect_off
, src_die
->offset
.sect_off
,
19983 objfile_name (cu
->objfile
));
19988 /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU.
19989 Returned value is intended for DW_OP_call*. Returned
19990 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
19992 struct dwarf2_locexpr_baton
19993 dwarf2_fetch_die_loc_sect_off (sect_offset offset
,
19994 struct dwarf2_per_cu_data
*per_cu
,
19995 CORE_ADDR (*get_frame_pc
) (void *baton
),
19998 struct dwarf2_cu
*cu
;
19999 struct die_info
*die
;
20000 struct attribute
*attr
;
20001 struct dwarf2_locexpr_baton retval
;
20003 dw2_setup (per_cu
->objfile
);
20005 if (per_cu
->cu
== NULL
)
20010 /* We shouldn't get here for a dummy CU, but don't crash on the user.
20011 Instead just throw an error, not much else we can do. */
20012 error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"),
20013 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20016 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
20018 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
20019 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20021 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
20024 /* DWARF: "If there is no such attribute, then there is no effect.".
20025 DATA is ignored if SIZE is 0. */
20027 retval
.data
= NULL
;
20030 else if (attr_form_is_section_offset (attr
))
20032 struct dwarf2_loclist_baton loclist_baton
;
20033 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
20036 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
20038 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
20040 retval
.size
= size
;
20044 if (!attr_form_is_block (attr
))
20045 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
20046 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
20047 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20049 retval
.data
= DW_BLOCK (attr
)->data
;
20050 retval
.size
= DW_BLOCK (attr
)->size
;
20052 retval
.per_cu
= cu
->per_cu
;
20054 age_cached_comp_units ();
20059 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
20062 struct dwarf2_locexpr_baton
20063 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
20064 struct dwarf2_per_cu_data
*per_cu
,
20065 CORE_ADDR (*get_frame_pc
) (void *baton
),
20068 sect_offset offset
= { per_cu
->offset
.sect_off
+ offset_in_cu
.cu_off
};
20070 return dwarf2_fetch_die_loc_sect_off (offset
, per_cu
, get_frame_pc
, baton
);
20073 /* Write a constant of a given type as target-ordered bytes into
20076 static const gdb_byte
*
20077 write_constant_as_bytes (struct obstack
*obstack
,
20078 enum bfd_endian byte_order
,
20085 *len
= TYPE_LENGTH (type
);
20086 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
20087 store_unsigned_integer (result
, *len
, byte_order
, value
);
20092 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
20093 pointer to the constant bytes and set LEN to the length of the
20094 data. If memory is needed, allocate it on OBSTACK. If the DIE
20095 does not have a DW_AT_const_value, return NULL. */
20098 dwarf2_fetch_constant_bytes (sect_offset offset
,
20099 struct dwarf2_per_cu_data
*per_cu
,
20100 struct obstack
*obstack
,
20103 struct dwarf2_cu
*cu
;
20104 struct die_info
*die
;
20105 struct attribute
*attr
;
20106 const gdb_byte
*result
= NULL
;
20109 enum bfd_endian byte_order
;
20111 dw2_setup (per_cu
->objfile
);
20113 if (per_cu
->cu
== NULL
)
20118 /* We shouldn't get here for a dummy CU, but don't crash on the user.
20119 Instead just throw an error, not much else we can do. */
20120 error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"),
20121 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20124 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
20126 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
20127 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20130 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20134 byte_order
= (bfd_big_endian (per_cu
->objfile
->obfd
)
20135 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
20137 switch (attr
->form
)
20140 case DW_FORM_GNU_addr_index
:
20144 *len
= cu
->header
.addr_size
;
20145 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
20146 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
20150 case DW_FORM_string
:
20152 case DW_FORM_GNU_str_index
:
20153 case DW_FORM_GNU_strp_alt
:
20154 /* DW_STRING is already allocated on the objfile obstack, point
20156 result
= (const gdb_byte
*) DW_STRING (attr
);
20157 *len
= strlen (DW_STRING (attr
));
20159 case DW_FORM_block1
:
20160 case DW_FORM_block2
:
20161 case DW_FORM_block4
:
20162 case DW_FORM_block
:
20163 case DW_FORM_exprloc
:
20164 result
= DW_BLOCK (attr
)->data
;
20165 *len
= DW_BLOCK (attr
)->size
;
20168 /* The DW_AT_const_value attributes are supposed to carry the
20169 symbol's value "represented as it would be on the target
20170 architecture." By the time we get here, it's already been
20171 converted to host endianness, so we just need to sign- or
20172 zero-extend it as appropriate. */
20173 case DW_FORM_data1
:
20174 type
= die_type (die
, cu
);
20175 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
20176 if (result
== NULL
)
20177 result
= write_constant_as_bytes (obstack
, byte_order
,
20180 case DW_FORM_data2
:
20181 type
= die_type (die
, cu
);
20182 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
20183 if (result
== NULL
)
20184 result
= write_constant_as_bytes (obstack
, byte_order
,
20187 case DW_FORM_data4
:
20188 type
= die_type (die
, cu
);
20189 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
20190 if (result
== NULL
)
20191 result
= write_constant_as_bytes (obstack
, byte_order
,
20194 case DW_FORM_data8
:
20195 type
= die_type (die
, cu
);
20196 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
20197 if (result
== NULL
)
20198 result
= write_constant_as_bytes (obstack
, byte_order
,
20202 case DW_FORM_sdata
:
20203 type
= die_type (die
, cu
);
20204 result
= write_constant_as_bytes (obstack
, byte_order
,
20205 type
, DW_SND (attr
), len
);
20208 case DW_FORM_udata
:
20209 type
= die_type (die
, cu
);
20210 result
= write_constant_as_bytes (obstack
, byte_order
,
20211 type
, DW_UNSND (attr
), len
);
20215 complaint (&symfile_complaints
,
20216 _("unsupported const value attribute form: '%s'"),
20217 dwarf_form_name (attr
->form
));
20224 /* Return the type of the DIE at DIE_OFFSET in the CU named by
20228 dwarf2_get_die_type (cu_offset die_offset
,
20229 struct dwarf2_per_cu_data
*per_cu
)
20231 sect_offset die_offset_sect
;
20233 dw2_setup (per_cu
->objfile
);
20235 die_offset_sect
.sect_off
= per_cu
->offset
.sect_off
+ die_offset
.cu_off
;
20236 return get_die_type_at_offset (die_offset_sect
, per_cu
);
20239 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
20240 On entry *REF_CU is the CU of SRC_DIE.
20241 On exit *REF_CU is the CU of the result.
20242 Returns NULL if the referenced DIE isn't found. */
20244 static struct die_info
*
20245 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
20246 struct dwarf2_cu
**ref_cu
)
20248 struct die_info temp_die
;
20249 struct dwarf2_cu
*sig_cu
;
20250 struct die_info
*die
;
20252 /* While it might be nice to assert sig_type->type == NULL here,
20253 we can get here for DW_AT_imported_declaration where we need
20254 the DIE not the type. */
20256 /* If necessary, add it to the queue and load its DIEs. */
20258 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
20259 read_signatured_type (sig_type
);
20261 sig_cu
= sig_type
->per_cu
.cu
;
20262 gdb_assert (sig_cu
!= NULL
);
20263 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
20264 temp_die
.offset
= sig_type
->type_offset_in_section
;
20265 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
20266 temp_die
.offset
.sect_off
);
20269 /* For .gdb_index version 7 keep track of included TUs.
20270 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
20271 if (dwarf2_per_objfile
->index_table
!= NULL
20272 && dwarf2_per_objfile
->index_table
->version
<= 7)
20274 VEC_safe_push (dwarf2_per_cu_ptr
,
20275 (*ref_cu
)->per_cu
->imported_symtabs
,
20286 /* Follow signatured type referenced by ATTR in SRC_DIE.
20287 On entry *REF_CU is the CU of SRC_DIE.
20288 On exit *REF_CU is the CU of the result.
20289 The result is the DIE of the type.
20290 If the referenced type cannot be found an error is thrown. */
20292 static struct die_info
*
20293 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
20294 struct dwarf2_cu
**ref_cu
)
20296 ULONGEST signature
= DW_SIGNATURE (attr
);
20297 struct signatured_type
*sig_type
;
20298 struct die_info
*die
;
20300 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
20302 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
20303 /* sig_type will be NULL if the signatured type is missing from
20305 if (sig_type
== NULL
)
20307 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
20308 " from DIE at 0x%x [in module %s]"),
20309 hex_string (signature
), src_die
->offset
.sect_off
,
20310 objfile_name ((*ref_cu
)->objfile
));
20313 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
20316 dump_die_for_error (src_die
);
20317 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
20318 " from DIE at 0x%x [in module %s]"),
20319 hex_string (signature
), src_die
->offset
.sect_off
,
20320 objfile_name ((*ref_cu
)->objfile
));
20326 /* Get the type specified by SIGNATURE referenced in DIE/CU,
20327 reading in and processing the type unit if necessary. */
20329 static struct type
*
20330 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
20331 struct dwarf2_cu
*cu
)
20333 struct signatured_type
*sig_type
;
20334 struct dwarf2_cu
*type_cu
;
20335 struct die_info
*type_die
;
20338 sig_type
= lookup_signatured_type (cu
, signature
);
20339 /* sig_type will be NULL if the signatured type is missing from
20341 if (sig_type
== NULL
)
20343 complaint (&symfile_complaints
,
20344 _("Dwarf Error: Cannot find signatured DIE %s referenced"
20345 " from DIE at 0x%x [in module %s]"),
20346 hex_string (signature
), die
->offset
.sect_off
,
20347 objfile_name (dwarf2_per_objfile
->objfile
));
20348 return build_error_marker_type (cu
, die
);
20351 /* If we already know the type we're done. */
20352 if (sig_type
->type
!= NULL
)
20353 return sig_type
->type
;
20356 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
20357 if (type_die
!= NULL
)
20359 /* N.B. We need to call get_die_type to ensure only one type for this DIE
20360 is created. This is important, for example, because for c++ classes
20361 we need TYPE_NAME set which is only done by new_symbol. Blech. */
20362 type
= read_type_die (type_die
, type_cu
);
20365 complaint (&symfile_complaints
,
20366 _("Dwarf Error: Cannot build signatured type %s"
20367 " referenced from DIE at 0x%x [in module %s]"),
20368 hex_string (signature
), die
->offset
.sect_off
,
20369 objfile_name (dwarf2_per_objfile
->objfile
));
20370 type
= build_error_marker_type (cu
, die
);
20375 complaint (&symfile_complaints
,
20376 _("Dwarf Error: Problem reading signatured DIE %s referenced"
20377 " from DIE at 0x%x [in module %s]"),
20378 hex_string (signature
), die
->offset
.sect_off
,
20379 objfile_name (dwarf2_per_objfile
->objfile
));
20380 type
= build_error_marker_type (cu
, die
);
20382 sig_type
->type
= type
;
20387 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
20388 reading in and processing the type unit if necessary. */
20390 static struct type
*
20391 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
20392 struct dwarf2_cu
*cu
) /* ARI: editCase function */
20394 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
20395 if (attr_form_is_ref (attr
))
20397 struct dwarf2_cu
*type_cu
= cu
;
20398 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
20400 return read_type_die (type_die
, type_cu
);
20402 else if (attr
->form
== DW_FORM_ref_sig8
)
20404 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
20408 complaint (&symfile_complaints
,
20409 _("Dwarf Error: DW_AT_signature has bad form %s in DIE"
20410 " at 0x%x [in module %s]"),
20411 dwarf_form_name (attr
->form
), die
->offset
.sect_off
,
20412 objfile_name (dwarf2_per_objfile
->objfile
));
20413 return build_error_marker_type (cu
, die
);
20417 /* Load the DIEs associated with type unit PER_CU into memory. */
20420 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
20422 struct signatured_type
*sig_type
;
20424 /* Caller is responsible for ensuring type_unit_groups don't get here. */
20425 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
20427 /* We have the per_cu, but we need the signatured_type.
20428 Fortunately this is an easy translation. */
20429 gdb_assert (per_cu
->is_debug_types
);
20430 sig_type
= (struct signatured_type
*) per_cu
;
20432 gdb_assert (per_cu
->cu
== NULL
);
20434 read_signatured_type (sig_type
);
20436 gdb_assert (per_cu
->cu
!= NULL
);
20439 /* die_reader_func for read_signatured_type.
20440 This is identical to load_full_comp_unit_reader,
20441 but is kept separate for now. */
20444 read_signatured_type_reader (const struct die_reader_specs
*reader
,
20445 const gdb_byte
*info_ptr
,
20446 struct die_info
*comp_unit_die
,
20450 struct dwarf2_cu
*cu
= reader
->cu
;
20452 gdb_assert (cu
->die_hash
== NULL
);
20454 htab_create_alloc_ex (cu
->header
.length
/ 12,
20458 &cu
->comp_unit_obstack
,
20459 hashtab_obstack_allocate
,
20460 dummy_obstack_deallocate
);
20463 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
20464 &info_ptr
, comp_unit_die
);
20465 cu
->dies
= comp_unit_die
;
20466 /* comp_unit_die is not stored in die_hash, no need. */
20468 /* We try not to read any attributes in this function, because not
20469 all CUs needed for references have been loaded yet, and symbol
20470 table processing isn't initialized. But we have to set the CU language,
20471 or we won't be able to build types correctly.
20472 Similarly, if we do not read the producer, we can not apply
20473 producer-specific interpretation. */
20474 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
20477 /* Read in a signatured type and build its CU and DIEs.
20478 If the type is a stub for the real type in a DWO file,
20479 read in the real type from the DWO file as well. */
20482 read_signatured_type (struct signatured_type
*sig_type
)
20484 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
20486 gdb_assert (per_cu
->is_debug_types
);
20487 gdb_assert (per_cu
->cu
== NULL
);
20489 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
20490 read_signatured_type_reader
, NULL
);
20491 sig_type
->per_cu
.tu_read
= 1;
20494 /* Decode simple location descriptions.
20495 Given a pointer to a dwarf block that defines a location, compute
20496 the location and return the value.
20498 NOTE drow/2003-11-18: This function is called in two situations
20499 now: for the address of static or global variables (partial symbols
20500 only) and for offsets into structures which are expected to be
20501 (more or less) constant. The partial symbol case should go away,
20502 and only the constant case should remain. That will let this
20503 function complain more accurately. A few special modes are allowed
20504 without complaint for global variables (for instance, global
20505 register values and thread-local values).
20507 A location description containing no operations indicates that the
20508 object is optimized out. The return value is 0 for that case.
20509 FIXME drow/2003-11-16: No callers check for this case any more; soon all
20510 callers will only want a very basic result and this can become a
20513 Note that stack[0] is unused except as a default error return. */
20516 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
20518 struct objfile
*objfile
= cu
->objfile
;
20520 size_t size
= blk
->size
;
20521 const gdb_byte
*data
= blk
->data
;
20522 CORE_ADDR stack
[64];
20524 unsigned int bytes_read
, unsnd
;
20530 stack
[++stacki
] = 0;
20569 stack
[++stacki
] = op
- DW_OP_lit0
;
20604 stack
[++stacki
] = op
- DW_OP_reg0
;
20606 dwarf2_complex_location_expr_complaint ();
20610 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
20612 stack
[++stacki
] = unsnd
;
20614 dwarf2_complex_location_expr_complaint ();
20618 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
20623 case DW_OP_const1u
:
20624 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
20628 case DW_OP_const1s
:
20629 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
20633 case DW_OP_const2u
:
20634 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
20638 case DW_OP_const2s
:
20639 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
20643 case DW_OP_const4u
:
20644 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
20648 case DW_OP_const4s
:
20649 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
20653 case DW_OP_const8u
:
20654 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
20659 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
20665 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
20670 stack
[stacki
+ 1] = stack
[stacki
];
20675 stack
[stacki
- 1] += stack
[stacki
];
20679 case DW_OP_plus_uconst
:
20680 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
20686 stack
[stacki
- 1] -= stack
[stacki
];
20691 /* If we're not the last op, then we definitely can't encode
20692 this using GDB's address_class enum. This is valid for partial
20693 global symbols, although the variable's address will be bogus
20696 dwarf2_complex_location_expr_complaint ();
20699 case DW_OP_GNU_push_tls_address
:
20700 case DW_OP_form_tls_address
:
20701 /* The top of the stack has the offset from the beginning
20702 of the thread control block at which the variable is located. */
20703 /* Nothing should follow this operator, so the top of stack would
20705 /* This is valid for partial global symbols, but the variable's
20706 address will be bogus in the psymtab. Make it always at least
20707 non-zero to not look as a variable garbage collected by linker
20708 which have DW_OP_addr 0. */
20710 dwarf2_complex_location_expr_complaint ();
20714 case DW_OP_GNU_uninit
:
20717 case DW_OP_GNU_addr_index
:
20718 case DW_OP_GNU_const_index
:
20719 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
20726 const char *name
= get_DW_OP_name (op
);
20729 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
20732 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
20736 return (stack
[stacki
]);
20739 /* Enforce maximum stack depth of SIZE-1 to avoid writing
20740 outside of the allocated space. Also enforce minimum>0. */
20741 if (stacki
>= ARRAY_SIZE (stack
) - 1)
20743 complaint (&symfile_complaints
,
20744 _("location description stack overflow"));
20750 complaint (&symfile_complaints
,
20751 _("location description stack underflow"));
20755 return (stack
[stacki
]);
20758 /* memory allocation interface */
20760 static struct dwarf_block
*
20761 dwarf_alloc_block (struct dwarf2_cu
*cu
)
20763 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
20766 static struct die_info
*
20767 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
20769 struct die_info
*die
;
20770 size_t size
= sizeof (struct die_info
);
20773 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
20775 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
20776 memset (die
, 0, sizeof (struct die_info
));
20781 /* Macro support. */
20783 /* Return file name relative to the compilation directory of file number I in
20784 *LH's file name table. The result is allocated using xmalloc; the caller is
20785 responsible for freeing it. */
20788 file_file_name (int file
, struct line_header
*lh
)
20790 /* Is the file number a valid index into the line header's file name
20791 table? Remember that file numbers start with one, not zero. */
20792 if (1 <= file
&& file
<= lh
->num_file_names
)
20794 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
20796 if (IS_ABSOLUTE_PATH (fe
->name
) || fe
->dir_index
== 0
20797 || lh
->include_dirs
== NULL
)
20798 return xstrdup (fe
->name
);
20799 return concat (lh
->include_dirs
[fe
->dir_index
- 1], SLASH_STRING
,
20800 fe
->name
, (char *) NULL
);
20804 /* The compiler produced a bogus file number. We can at least
20805 record the macro definitions made in the file, even if we
20806 won't be able to find the file by name. */
20807 char fake_name
[80];
20809 xsnprintf (fake_name
, sizeof (fake_name
),
20810 "<bad macro file number %d>", file
);
20812 complaint (&symfile_complaints
,
20813 _("bad file number in macro information (%d)"),
20816 return xstrdup (fake_name
);
20820 /* Return the full name of file number I in *LH's file name table.
20821 Use COMP_DIR as the name of the current directory of the
20822 compilation. The result is allocated using xmalloc; the caller is
20823 responsible for freeing it. */
20825 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
20827 /* Is the file number a valid index into the line header's file name
20828 table? Remember that file numbers start with one, not zero. */
20829 if (1 <= file
&& file
<= lh
->num_file_names
)
20831 char *relative
= file_file_name (file
, lh
);
20833 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
20835 return reconcat (relative
, comp_dir
, SLASH_STRING
,
20836 relative
, (char *) NULL
);
20839 return file_file_name (file
, lh
);
20843 static struct macro_source_file
*
20844 macro_start_file (int file
, int line
,
20845 struct macro_source_file
*current_file
,
20846 struct line_header
*lh
)
20848 /* File name relative to the compilation directory of this source file. */
20849 char *file_name
= file_file_name (file
, lh
);
20851 if (! current_file
)
20853 /* Note: We don't create a macro table for this compilation unit
20854 at all until we actually get a filename. */
20855 struct macro_table
*macro_table
= get_macro_table ();
20857 /* If we have no current file, then this must be the start_file
20858 directive for the compilation unit's main source file. */
20859 current_file
= macro_set_main (macro_table
, file_name
);
20860 macro_define_special (macro_table
);
20863 current_file
= macro_include (current_file
, line
, file_name
);
20867 return current_file
;
20871 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
20872 followed by a null byte. */
20874 copy_string (const char *buf
, int len
)
20876 char *s
= (char *) xmalloc (len
+ 1);
20878 memcpy (s
, buf
, len
);
20884 static const char *
20885 consume_improper_spaces (const char *p
, const char *body
)
20889 complaint (&symfile_complaints
,
20890 _("macro definition contains spaces "
20891 "in formal argument list:\n`%s'"),
20903 parse_macro_definition (struct macro_source_file
*file
, int line
,
20908 /* The body string takes one of two forms. For object-like macro
20909 definitions, it should be:
20911 <macro name> " " <definition>
20913 For function-like macro definitions, it should be:
20915 <macro name> "() " <definition>
20917 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
20919 Spaces may appear only where explicitly indicated, and in the
20922 The Dwarf 2 spec says that an object-like macro's name is always
20923 followed by a space, but versions of GCC around March 2002 omit
20924 the space when the macro's definition is the empty string.
20926 The Dwarf 2 spec says that there should be no spaces between the
20927 formal arguments in a function-like macro's formal argument list,
20928 but versions of GCC around March 2002 include spaces after the
20932 /* Find the extent of the macro name. The macro name is terminated
20933 by either a space or null character (for an object-like macro) or
20934 an opening paren (for a function-like macro). */
20935 for (p
= body
; *p
; p
++)
20936 if (*p
== ' ' || *p
== '(')
20939 if (*p
== ' ' || *p
== '\0')
20941 /* It's an object-like macro. */
20942 int name_len
= p
- body
;
20943 char *name
= copy_string (body
, name_len
);
20944 const char *replacement
;
20947 replacement
= body
+ name_len
+ 1;
20950 dwarf2_macro_malformed_definition_complaint (body
);
20951 replacement
= body
+ name_len
;
20954 macro_define_object (file
, line
, name
, replacement
);
20958 else if (*p
== '(')
20960 /* It's a function-like macro. */
20961 char *name
= copy_string (body
, p
- body
);
20964 char **argv
= XNEWVEC (char *, argv_size
);
20968 p
= consume_improper_spaces (p
, body
);
20970 /* Parse the formal argument list. */
20971 while (*p
&& *p
!= ')')
20973 /* Find the extent of the current argument name. */
20974 const char *arg_start
= p
;
20976 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
20979 if (! *p
|| p
== arg_start
)
20980 dwarf2_macro_malformed_definition_complaint (body
);
20983 /* Make sure argv has room for the new argument. */
20984 if (argc
>= argv_size
)
20987 argv
= XRESIZEVEC (char *, argv
, argv_size
);
20990 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
20993 p
= consume_improper_spaces (p
, body
);
20995 /* Consume the comma, if present. */
21000 p
= consume_improper_spaces (p
, body
);
21009 /* Perfectly formed definition, no complaints. */
21010 macro_define_function (file
, line
, name
,
21011 argc
, (const char **) argv
,
21013 else if (*p
== '\0')
21015 /* Complain, but do define it. */
21016 dwarf2_macro_malformed_definition_complaint (body
);
21017 macro_define_function (file
, line
, name
,
21018 argc
, (const char **) argv
,
21022 /* Just complain. */
21023 dwarf2_macro_malformed_definition_complaint (body
);
21026 /* Just complain. */
21027 dwarf2_macro_malformed_definition_complaint (body
);
21033 for (i
= 0; i
< argc
; i
++)
21039 dwarf2_macro_malformed_definition_complaint (body
);
21042 /* Skip some bytes from BYTES according to the form given in FORM.
21043 Returns the new pointer. */
21045 static const gdb_byte
*
21046 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
21047 enum dwarf_form form
,
21048 unsigned int offset_size
,
21049 struct dwarf2_section_info
*section
)
21051 unsigned int bytes_read
;
21055 case DW_FORM_data1
:
21060 case DW_FORM_data2
:
21064 case DW_FORM_data4
:
21068 case DW_FORM_data8
:
21072 case DW_FORM_string
:
21073 read_direct_string (abfd
, bytes
, &bytes_read
);
21074 bytes
+= bytes_read
;
21077 case DW_FORM_sec_offset
:
21079 case DW_FORM_GNU_strp_alt
:
21080 bytes
+= offset_size
;
21083 case DW_FORM_block
:
21084 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
21085 bytes
+= bytes_read
;
21088 case DW_FORM_block1
:
21089 bytes
+= 1 + read_1_byte (abfd
, bytes
);
21091 case DW_FORM_block2
:
21092 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
21094 case DW_FORM_block4
:
21095 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
21098 case DW_FORM_sdata
:
21099 case DW_FORM_udata
:
21100 case DW_FORM_GNU_addr_index
:
21101 case DW_FORM_GNU_str_index
:
21102 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
21105 dwarf2_section_buffer_overflow_complaint (section
);
21113 complaint (&symfile_complaints
,
21114 _("invalid form 0x%x in `%s'"),
21115 form
, get_section_name (section
));
21123 /* A helper for dwarf_decode_macros that handles skipping an unknown
21124 opcode. Returns an updated pointer to the macro data buffer; or,
21125 on error, issues a complaint and returns NULL. */
21127 static const gdb_byte
*
21128 skip_unknown_opcode (unsigned int opcode
,
21129 const gdb_byte
**opcode_definitions
,
21130 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
21132 unsigned int offset_size
,
21133 struct dwarf2_section_info
*section
)
21135 unsigned int bytes_read
, i
;
21137 const gdb_byte
*defn
;
21139 if (opcode_definitions
[opcode
] == NULL
)
21141 complaint (&symfile_complaints
,
21142 _("unrecognized DW_MACFINO opcode 0x%x"),
21147 defn
= opcode_definitions
[opcode
];
21148 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
21149 defn
+= bytes_read
;
21151 for (i
= 0; i
< arg
; ++i
)
21153 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
,
21154 (enum dwarf_form
) defn
[i
], offset_size
,
21156 if (mac_ptr
== NULL
)
21158 /* skip_form_bytes already issued the complaint. */
21166 /* A helper function which parses the header of a macro section.
21167 If the macro section is the extended (for now called "GNU") type,
21168 then this updates *OFFSET_SIZE. Returns a pointer to just after
21169 the header, or issues a complaint and returns NULL on error. */
21171 static const gdb_byte
*
21172 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
21174 const gdb_byte
*mac_ptr
,
21175 unsigned int *offset_size
,
21176 int section_is_gnu
)
21178 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
21180 if (section_is_gnu
)
21182 unsigned int version
, flags
;
21184 version
= read_2_bytes (abfd
, mac_ptr
);
21187 complaint (&symfile_complaints
,
21188 _("unrecognized version `%d' in .debug_macro section"),
21194 flags
= read_1_byte (abfd
, mac_ptr
);
21196 *offset_size
= (flags
& 1) ? 8 : 4;
21198 if ((flags
& 2) != 0)
21199 /* We don't need the line table offset. */
21200 mac_ptr
+= *offset_size
;
21202 /* Vendor opcode descriptions. */
21203 if ((flags
& 4) != 0)
21205 unsigned int i
, count
;
21207 count
= read_1_byte (abfd
, mac_ptr
);
21209 for (i
= 0; i
< count
; ++i
)
21211 unsigned int opcode
, bytes_read
;
21214 opcode
= read_1_byte (abfd
, mac_ptr
);
21216 opcode_definitions
[opcode
] = mac_ptr
;
21217 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21218 mac_ptr
+= bytes_read
;
21227 /* A helper for dwarf_decode_macros that handles the GNU extensions,
21228 including DW_MACRO_GNU_transparent_include. */
21231 dwarf_decode_macro_bytes (bfd
*abfd
,
21232 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
21233 struct macro_source_file
*current_file
,
21234 struct line_header
*lh
,
21235 struct dwarf2_section_info
*section
,
21236 int section_is_gnu
, int section_is_dwz
,
21237 unsigned int offset_size
,
21238 htab_t include_hash
)
21240 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21241 enum dwarf_macro_record_type macinfo_type
;
21242 int at_commandline
;
21243 const gdb_byte
*opcode_definitions
[256];
21245 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
21246 &offset_size
, section_is_gnu
);
21247 if (mac_ptr
== NULL
)
21249 /* We already issued a complaint. */
21253 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
21254 GDB is still reading the definitions from command line. First
21255 DW_MACINFO_start_file will need to be ignored as it was already executed
21256 to create CURRENT_FILE for the main source holding also the command line
21257 definitions. On first met DW_MACINFO_start_file this flag is reset to
21258 normally execute all the remaining DW_MACINFO_start_file macinfos. */
21260 at_commandline
= 1;
21264 /* Do we at least have room for a macinfo type byte? */
21265 if (mac_ptr
>= mac_end
)
21267 dwarf2_section_buffer_overflow_complaint (section
);
21271 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
21274 /* Note that we rely on the fact that the corresponding GNU and
21275 DWARF constants are the same. */
21276 switch (macinfo_type
)
21278 /* A zero macinfo type indicates the end of the macro
21283 case DW_MACRO_GNU_define
:
21284 case DW_MACRO_GNU_undef
:
21285 case DW_MACRO_GNU_define_indirect
:
21286 case DW_MACRO_GNU_undef_indirect
:
21287 case DW_MACRO_GNU_define_indirect_alt
:
21288 case DW_MACRO_GNU_undef_indirect_alt
:
21290 unsigned int bytes_read
;
21295 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21296 mac_ptr
+= bytes_read
;
21298 if (macinfo_type
== DW_MACRO_GNU_define
21299 || macinfo_type
== DW_MACRO_GNU_undef
)
21301 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21302 mac_ptr
+= bytes_read
;
21306 LONGEST str_offset
;
21308 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
21309 mac_ptr
+= offset_size
;
21311 if (macinfo_type
== DW_MACRO_GNU_define_indirect_alt
21312 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
21315 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
21317 body
= read_indirect_string_from_dwz (dwz
, str_offset
);
21320 body
= read_indirect_string_at_offset (abfd
, str_offset
);
21323 is_define
= (macinfo_type
== DW_MACRO_GNU_define
21324 || macinfo_type
== DW_MACRO_GNU_define_indirect
21325 || macinfo_type
== DW_MACRO_GNU_define_indirect_alt
);
21326 if (! current_file
)
21328 /* DWARF violation as no main source is present. */
21329 complaint (&symfile_complaints
,
21330 _("debug info with no main source gives macro %s "
21332 is_define
? _("definition") : _("undefinition"),
21336 if ((line
== 0 && !at_commandline
)
21337 || (line
!= 0 && at_commandline
))
21338 complaint (&symfile_complaints
,
21339 _("debug info gives %s macro %s with %s line %d: %s"),
21340 at_commandline
? _("command-line") : _("in-file"),
21341 is_define
? _("definition") : _("undefinition"),
21342 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
21345 parse_macro_definition (current_file
, line
, body
);
21348 gdb_assert (macinfo_type
== DW_MACRO_GNU_undef
21349 || macinfo_type
== DW_MACRO_GNU_undef_indirect
21350 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
);
21351 macro_undef (current_file
, line
, body
);
21356 case DW_MACRO_GNU_start_file
:
21358 unsigned int bytes_read
;
21361 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21362 mac_ptr
+= bytes_read
;
21363 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21364 mac_ptr
+= bytes_read
;
21366 if ((line
== 0 && !at_commandline
)
21367 || (line
!= 0 && at_commandline
))
21368 complaint (&symfile_complaints
,
21369 _("debug info gives source %d included "
21370 "from %s at %s line %d"),
21371 file
, at_commandline
? _("command-line") : _("file"),
21372 line
== 0 ? _("zero") : _("non-zero"), line
);
21374 if (at_commandline
)
21376 /* This DW_MACRO_GNU_start_file was executed in the
21378 at_commandline
= 0;
21381 current_file
= macro_start_file (file
, line
, current_file
, lh
);
21385 case DW_MACRO_GNU_end_file
:
21386 if (! current_file
)
21387 complaint (&symfile_complaints
,
21388 _("macro debug info has an unmatched "
21389 "`close_file' directive"));
21392 current_file
= current_file
->included_by
;
21393 if (! current_file
)
21395 enum dwarf_macro_record_type next_type
;
21397 /* GCC circa March 2002 doesn't produce the zero
21398 type byte marking the end of the compilation
21399 unit. Complain if it's not there, but exit no
21402 /* Do we at least have room for a macinfo type byte? */
21403 if (mac_ptr
>= mac_end
)
21405 dwarf2_section_buffer_overflow_complaint (section
);
21409 /* We don't increment mac_ptr here, so this is just
21412 = (enum dwarf_macro_record_type
) read_1_byte (abfd
,
21414 if (next_type
!= 0)
21415 complaint (&symfile_complaints
,
21416 _("no terminating 0-type entry for "
21417 "macros in `.debug_macinfo' section"));
21424 case DW_MACRO_GNU_transparent_include
:
21425 case DW_MACRO_GNU_transparent_include_alt
:
21429 bfd
*include_bfd
= abfd
;
21430 struct dwarf2_section_info
*include_section
= section
;
21431 const gdb_byte
*include_mac_end
= mac_end
;
21432 int is_dwz
= section_is_dwz
;
21433 const gdb_byte
*new_mac_ptr
;
21435 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
21436 mac_ptr
+= offset_size
;
21438 if (macinfo_type
== DW_MACRO_GNU_transparent_include_alt
)
21440 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
21442 dwarf2_read_section (objfile
, &dwz
->macro
);
21444 include_section
= &dwz
->macro
;
21445 include_bfd
= get_section_bfd_owner (include_section
);
21446 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
21450 new_mac_ptr
= include_section
->buffer
+ offset
;
21451 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
21455 /* This has actually happened; see
21456 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
21457 complaint (&symfile_complaints
,
21458 _("recursive DW_MACRO_GNU_transparent_include in "
21459 ".debug_macro section"));
21463 *slot
= (void *) new_mac_ptr
;
21465 dwarf_decode_macro_bytes (include_bfd
, new_mac_ptr
,
21466 include_mac_end
, current_file
, lh
,
21467 section
, section_is_gnu
, is_dwz
,
21468 offset_size
, include_hash
);
21470 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
21475 case DW_MACINFO_vendor_ext
:
21476 if (!section_is_gnu
)
21478 unsigned int bytes_read
;
21480 /* This reads the constant, but since we don't recognize
21481 any vendor extensions, we ignore it. */
21482 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21483 mac_ptr
+= bytes_read
;
21484 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21485 mac_ptr
+= bytes_read
;
21487 /* We don't recognize any vendor extensions. */
21493 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
21494 mac_ptr
, mac_end
, abfd
, offset_size
,
21496 if (mac_ptr
== NULL
)
21500 } while (macinfo_type
!= 0);
21504 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
21505 int section_is_gnu
)
21507 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21508 struct line_header
*lh
= cu
->line_header
;
21510 const gdb_byte
*mac_ptr
, *mac_end
;
21511 struct macro_source_file
*current_file
= 0;
21512 enum dwarf_macro_record_type macinfo_type
;
21513 unsigned int offset_size
= cu
->header
.offset_size
;
21514 const gdb_byte
*opcode_definitions
[256];
21515 struct cleanup
*cleanup
;
21517 struct dwarf2_section_info
*section
;
21518 const char *section_name
;
21520 if (cu
->dwo_unit
!= NULL
)
21522 if (section_is_gnu
)
21524 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
21525 section_name
= ".debug_macro.dwo";
21529 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
21530 section_name
= ".debug_macinfo.dwo";
21535 if (section_is_gnu
)
21537 section
= &dwarf2_per_objfile
->macro
;
21538 section_name
= ".debug_macro";
21542 section
= &dwarf2_per_objfile
->macinfo
;
21543 section_name
= ".debug_macinfo";
21547 dwarf2_read_section (objfile
, section
);
21548 if (section
->buffer
== NULL
)
21550 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
21553 abfd
= get_section_bfd_owner (section
);
21555 /* First pass: Find the name of the base filename.
21556 This filename is needed in order to process all macros whose definition
21557 (or undefinition) comes from the command line. These macros are defined
21558 before the first DW_MACINFO_start_file entry, and yet still need to be
21559 associated to the base file.
21561 To determine the base file name, we scan the macro definitions until we
21562 reach the first DW_MACINFO_start_file entry. We then initialize
21563 CURRENT_FILE accordingly so that any macro definition found before the
21564 first DW_MACINFO_start_file can still be associated to the base file. */
21566 mac_ptr
= section
->buffer
+ offset
;
21567 mac_end
= section
->buffer
+ section
->size
;
21569 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
21570 &offset_size
, section_is_gnu
);
21571 if (mac_ptr
== NULL
)
21573 /* We already issued a complaint. */
21579 /* Do we at least have room for a macinfo type byte? */
21580 if (mac_ptr
>= mac_end
)
21582 /* Complaint is printed during the second pass as GDB will probably
21583 stop the first pass earlier upon finding
21584 DW_MACINFO_start_file. */
21588 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
21591 /* Note that we rely on the fact that the corresponding GNU and
21592 DWARF constants are the same. */
21593 switch (macinfo_type
)
21595 /* A zero macinfo type indicates the end of the macro
21600 case DW_MACRO_GNU_define
:
21601 case DW_MACRO_GNU_undef
:
21602 /* Only skip the data by MAC_PTR. */
21604 unsigned int bytes_read
;
21606 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21607 mac_ptr
+= bytes_read
;
21608 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21609 mac_ptr
+= bytes_read
;
21613 case DW_MACRO_GNU_start_file
:
21615 unsigned int bytes_read
;
21618 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21619 mac_ptr
+= bytes_read
;
21620 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21621 mac_ptr
+= bytes_read
;
21623 current_file
= macro_start_file (file
, line
, current_file
, lh
);
21627 case DW_MACRO_GNU_end_file
:
21628 /* No data to skip by MAC_PTR. */
21631 case DW_MACRO_GNU_define_indirect
:
21632 case DW_MACRO_GNU_undef_indirect
:
21633 case DW_MACRO_GNU_define_indirect_alt
:
21634 case DW_MACRO_GNU_undef_indirect_alt
:
21636 unsigned int bytes_read
;
21638 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21639 mac_ptr
+= bytes_read
;
21640 mac_ptr
+= offset_size
;
21644 case DW_MACRO_GNU_transparent_include
:
21645 case DW_MACRO_GNU_transparent_include_alt
:
21646 /* Note that, according to the spec, a transparent include
21647 chain cannot call DW_MACRO_GNU_start_file. So, we can just
21648 skip this opcode. */
21649 mac_ptr
+= offset_size
;
21652 case DW_MACINFO_vendor_ext
:
21653 /* Only skip the data by MAC_PTR. */
21654 if (!section_is_gnu
)
21656 unsigned int bytes_read
;
21658 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21659 mac_ptr
+= bytes_read
;
21660 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21661 mac_ptr
+= bytes_read
;
21666 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
21667 mac_ptr
, mac_end
, abfd
, offset_size
,
21669 if (mac_ptr
== NULL
)
21673 } while (macinfo_type
!= 0 && current_file
== NULL
);
21675 /* Second pass: Process all entries.
21677 Use the AT_COMMAND_LINE flag to determine whether we are still processing
21678 command-line macro definitions/undefinitions. This flag is unset when we
21679 reach the first DW_MACINFO_start_file entry. */
21681 htab_up
include_hash (htab_create_alloc (1, htab_hash_pointer
,
21683 NULL
, xcalloc
, xfree
));
21684 mac_ptr
= section
->buffer
+ offset
;
21685 slot
= htab_find_slot (include_hash
.get (), mac_ptr
, INSERT
);
21686 *slot
= (void *) mac_ptr
;
21687 dwarf_decode_macro_bytes (abfd
, mac_ptr
, mac_end
,
21688 current_file
, lh
, section
,
21689 section_is_gnu
, 0, offset_size
,
21690 include_hash
.get ());
21693 /* Check if the attribute's form is a DW_FORM_block*
21694 if so return true else false. */
21697 attr_form_is_block (const struct attribute
*attr
)
21699 return (attr
== NULL
? 0 :
21700 attr
->form
== DW_FORM_block1
21701 || attr
->form
== DW_FORM_block2
21702 || attr
->form
== DW_FORM_block4
21703 || attr
->form
== DW_FORM_block
21704 || attr
->form
== DW_FORM_exprloc
);
21707 /* Return non-zero if ATTR's value is a section offset --- classes
21708 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
21709 You may use DW_UNSND (attr) to retrieve such offsets.
21711 Section 7.5.4, "Attribute Encodings", explains that no attribute
21712 may have a value that belongs to more than one of these classes; it
21713 would be ambiguous if we did, because we use the same forms for all
21717 attr_form_is_section_offset (const struct attribute
*attr
)
21719 return (attr
->form
== DW_FORM_data4
21720 || attr
->form
== DW_FORM_data8
21721 || attr
->form
== DW_FORM_sec_offset
);
21724 /* Return non-zero if ATTR's value falls in the 'constant' class, or
21725 zero otherwise. When this function returns true, you can apply
21726 dwarf2_get_attr_constant_value to it.
21728 However, note that for some attributes you must check
21729 attr_form_is_section_offset before using this test. DW_FORM_data4
21730 and DW_FORM_data8 are members of both the constant class, and of
21731 the classes that contain offsets into other debug sections
21732 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
21733 that, if an attribute's can be either a constant or one of the
21734 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
21735 taken as section offsets, not constants. */
21738 attr_form_is_constant (const struct attribute
*attr
)
21740 switch (attr
->form
)
21742 case DW_FORM_sdata
:
21743 case DW_FORM_udata
:
21744 case DW_FORM_data1
:
21745 case DW_FORM_data2
:
21746 case DW_FORM_data4
:
21747 case DW_FORM_data8
:
21755 /* DW_ADDR is always stored already as sect_offset; despite for the forms
21756 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
21759 attr_form_is_ref (const struct attribute
*attr
)
21761 switch (attr
->form
)
21763 case DW_FORM_ref_addr
:
21768 case DW_FORM_ref_udata
:
21769 case DW_FORM_GNU_ref_alt
:
21776 /* Return the .debug_loc section to use for CU.
21777 For DWO files use .debug_loc.dwo. */
21779 static struct dwarf2_section_info
*
21780 cu_debug_loc_section (struct dwarf2_cu
*cu
)
21783 return &cu
->dwo_unit
->dwo_file
->sections
.loc
;
21784 return &dwarf2_per_objfile
->loc
;
21787 /* A helper function that fills in a dwarf2_loclist_baton. */
21790 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
21791 struct dwarf2_loclist_baton
*baton
,
21792 const struct attribute
*attr
)
21794 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
21796 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
21798 baton
->per_cu
= cu
->per_cu
;
21799 gdb_assert (baton
->per_cu
);
21800 /* We don't know how long the location list is, but make sure we
21801 don't run off the edge of the section. */
21802 baton
->size
= section
->size
- DW_UNSND (attr
);
21803 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
21804 baton
->base_address
= cu
->base_address
;
21805 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
21809 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
21810 struct dwarf2_cu
*cu
, int is_block
)
21812 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21813 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
21815 if (attr_form_is_section_offset (attr
)
21816 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
21817 the section. If so, fall through to the complaint in the
21819 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
21821 struct dwarf2_loclist_baton
*baton
;
21823 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
21825 fill_in_loclist_baton (cu
, baton
, attr
);
21827 if (cu
->base_known
== 0)
21828 complaint (&symfile_complaints
,
21829 _("Location list used without "
21830 "specifying the CU base address."));
21832 SYMBOL_ACLASS_INDEX (sym
) = (is_block
21833 ? dwarf2_loclist_block_index
21834 : dwarf2_loclist_index
);
21835 SYMBOL_LOCATION_BATON (sym
) = baton
;
21839 struct dwarf2_locexpr_baton
*baton
;
21841 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
21842 baton
->per_cu
= cu
->per_cu
;
21843 gdb_assert (baton
->per_cu
);
21845 if (attr_form_is_block (attr
))
21847 /* Note that we're just copying the block's data pointer
21848 here, not the actual data. We're still pointing into the
21849 info_buffer for SYM's objfile; right now we never release
21850 that buffer, but when we do clean up properly this may
21852 baton
->size
= DW_BLOCK (attr
)->size
;
21853 baton
->data
= DW_BLOCK (attr
)->data
;
21857 dwarf2_invalid_attrib_class_complaint ("location description",
21858 SYMBOL_NATURAL_NAME (sym
));
21862 SYMBOL_ACLASS_INDEX (sym
) = (is_block
21863 ? dwarf2_locexpr_block_index
21864 : dwarf2_locexpr_index
);
21865 SYMBOL_LOCATION_BATON (sym
) = baton
;
21869 /* Return the OBJFILE associated with the compilation unit CU. If CU
21870 came from a separate debuginfo file, then the master objfile is
21874 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
21876 struct objfile
*objfile
= per_cu
->objfile
;
21878 /* Return the master objfile, so that we can report and look up the
21879 correct file containing this variable. */
21880 if (objfile
->separate_debug_objfile_backlink
)
21881 objfile
= objfile
->separate_debug_objfile_backlink
;
21886 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
21887 (CU_HEADERP is unused in such case) or prepare a temporary copy at
21888 CU_HEADERP first. */
21890 static const struct comp_unit_head
*
21891 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
21892 struct dwarf2_per_cu_data
*per_cu
)
21894 const gdb_byte
*info_ptr
;
21897 return &per_cu
->cu
->header
;
21899 info_ptr
= per_cu
->section
->buffer
+ per_cu
->offset
.sect_off
;
21901 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
21902 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->objfile
->obfd
);
21907 /* Return the address size given in the compilation unit header for CU. */
21910 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
21912 struct comp_unit_head cu_header_local
;
21913 const struct comp_unit_head
*cu_headerp
;
21915 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21917 return cu_headerp
->addr_size
;
21920 /* Return the offset size given in the compilation unit header for CU. */
21923 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
21925 struct comp_unit_head cu_header_local
;
21926 const struct comp_unit_head
*cu_headerp
;
21928 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21930 return cu_headerp
->offset_size
;
21933 /* See its dwarf2loc.h declaration. */
21936 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
21938 struct comp_unit_head cu_header_local
;
21939 const struct comp_unit_head
*cu_headerp
;
21941 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21943 if (cu_headerp
->version
== 2)
21944 return cu_headerp
->addr_size
;
21946 return cu_headerp
->offset_size
;
21949 /* Return the text offset of the CU. The returned offset comes from
21950 this CU's objfile. If this objfile came from a separate debuginfo
21951 file, then the offset may be different from the corresponding
21952 offset in the parent objfile. */
21955 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
21957 struct objfile
*objfile
= per_cu
->objfile
;
21959 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
21962 /* Locate the .debug_info compilation unit from CU's objfile which contains
21963 the DIE at OFFSET. Raises an error on failure. */
21965 static struct dwarf2_per_cu_data
*
21966 dwarf2_find_containing_comp_unit (sect_offset offset
,
21967 unsigned int offset_in_dwz
,
21968 struct objfile
*objfile
)
21970 struct dwarf2_per_cu_data
*this_cu
;
21972 const sect_offset
*cu_off
;
21975 high
= dwarf2_per_objfile
->n_comp_units
- 1;
21978 struct dwarf2_per_cu_data
*mid_cu
;
21979 int mid
= low
+ (high
- low
) / 2;
21981 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
21982 cu_off
= &mid_cu
->offset
;
21983 if (mid_cu
->is_dwz
> offset_in_dwz
21984 || (mid_cu
->is_dwz
== offset_in_dwz
21985 && cu_off
->sect_off
>= offset
.sect_off
))
21990 gdb_assert (low
== high
);
21991 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
21992 cu_off
= &this_cu
->offset
;
21993 if (this_cu
->is_dwz
!= offset_in_dwz
|| cu_off
->sect_off
> offset
.sect_off
)
21995 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
21996 error (_("Dwarf Error: could not find partial DIE containing "
21997 "offset 0x%lx [in module %s]"),
21998 (long) offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
22000 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
.sect_off
22001 <= offset
.sect_off
);
22002 return dwarf2_per_objfile
->all_comp_units
[low
-1];
22006 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
22007 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
22008 && offset
.sect_off
>= this_cu
->offset
.sect_off
+ this_cu
->length
)
22009 error (_("invalid dwarf2 offset %u"), offset
.sect_off
);
22010 gdb_assert (offset
.sect_off
< this_cu
->offset
.sect_off
+ this_cu
->length
);
22015 /* Initialize dwarf2_cu CU, owned by PER_CU. */
22018 init_one_comp_unit (struct dwarf2_cu
*cu
, struct dwarf2_per_cu_data
*per_cu
)
22020 memset (cu
, 0, sizeof (*cu
));
22022 cu
->per_cu
= per_cu
;
22023 cu
->objfile
= per_cu
->objfile
;
22024 obstack_init (&cu
->comp_unit_obstack
);
22027 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
22030 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
22031 enum language pretend_language
)
22033 struct attribute
*attr
;
22035 /* Set the language we're debugging. */
22036 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
22038 set_cu_language (DW_UNSND (attr
), cu
);
22041 cu
->language
= pretend_language
;
22042 cu
->language_defn
= language_def (cu
->language
);
22045 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
22048 /* Release one cached compilation unit, CU. We unlink it from the tree
22049 of compilation units, but we don't remove it from the read_in_chain;
22050 the caller is responsible for that.
22051 NOTE: DATA is a void * because this function is also used as a
22052 cleanup routine. */
22055 free_heap_comp_unit (void *data
)
22057 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) data
;
22059 gdb_assert (cu
->per_cu
!= NULL
);
22060 cu
->per_cu
->cu
= NULL
;
22063 obstack_free (&cu
->comp_unit_obstack
, NULL
);
22068 /* This cleanup function is passed the address of a dwarf2_cu on the stack
22069 when we're finished with it. We can't free the pointer itself, but be
22070 sure to unlink it from the cache. Also release any associated storage. */
22073 free_stack_comp_unit (void *data
)
22075 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) data
;
22077 gdb_assert (cu
->per_cu
!= NULL
);
22078 cu
->per_cu
->cu
= NULL
;
22081 obstack_free (&cu
->comp_unit_obstack
, NULL
);
22082 cu
->partial_dies
= NULL
;
22085 /* Free all cached compilation units. */
22088 free_cached_comp_units (void *data
)
22090 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22092 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22093 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22094 while (per_cu
!= NULL
)
22096 struct dwarf2_per_cu_data
*next_cu
;
22098 next_cu
= per_cu
->cu
->read_in_chain
;
22100 free_heap_comp_unit (per_cu
->cu
);
22101 *last_chain
= next_cu
;
22107 /* Increase the age counter on each cached compilation unit, and free
22108 any that are too old. */
22111 age_cached_comp_units (void)
22113 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22115 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
22116 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22117 while (per_cu
!= NULL
)
22119 per_cu
->cu
->last_used
++;
22120 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
22121 dwarf2_mark (per_cu
->cu
);
22122 per_cu
= per_cu
->cu
->read_in_chain
;
22125 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22126 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22127 while (per_cu
!= NULL
)
22129 struct dwarf2_per_cu_data
*next_cu
;
22131 next_cu
= per_cu
->cu
->read_in_chain
;
22133 if (!per_cu
->cu
->mark
)
22135 free_heap_comp_unit (per_cu
->cu
);
22136 *last_chain
= next_cu
;
22139 last_chain
= &per_cu
->cu
->read_in_chain
;
22145 /* Remove a single compilation unit from the cache. */
22148 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
22150 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22152 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22153 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22154 while (per_cu
!= NULL
)
22156 struct dwarf2_per_cu_data
*next_cu
;
22158 next_cu
= per_cu
->cu
->read_in_chain
;
22160 if (per_cu
== target_per_cu
)
22162 free_heap_comp_unit (per_cu
->cu
);
22164 *last_chain
= next_cu
;
22168 last_chain
= &per_cu
->cu
->read_in_chain
;
22174 /* Release all extra memory associated with OBJFILE. */
22177 dwarf2_free_objfile (struct objfile
*objfile
)
22180 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
22181 dwarf2_objfile_data_key
);
22183 if (dwarf2_per_objfile
== NULL
)
22186 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
22187 free_cached_comp_units (NULL
);
22189 if (dwarf2_per_objfile
->quick_file_names_table
)
22190 htab_delete (dwarf2_per_objfile
->quick_file_names_table
);
22192 if (dwarf2_per_objfile
->line_header_hash
)
22193 htab_delete (dwarf2_per_objfile
->line_header_hash
);
22195 /* Everything else should be on the objfile obstack. */
22198 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
22199 We store these in a hash table separate from the DIEs, and preserve them
22200 when the DIEs are flushed out of cache.
22202 The CU "per_cu" pointer is needed because offset alone is not enough to
22203 uniquely identify the type. A file may have multiple .debug_types sections,
22204 or the type may come from a DWO file. Furthermore, while it's more logical
22205 to use per_cu->section+offset, with Fission the section with the data is in
22206 the DWO file but we don't know that section at the point we need it.
22207 We have to use something in dwarf2_per_cu_data (or the pointer to it)
22208 because we can enter the lookup routine, get_die_type_at_offset, from
22209 outside this file, and thus won't necessarily have PER_CU->cu.
22210 Fortunately, PER_CU is stable for the life of the objfile. */
22212 struct dwarf2_per_cu_offset_and_type
22214 const struct dwarf2_per_cu_data
*per_cu
;
22215 sect_offset offset
;
22219 /* Hash function for a dwarf2_per_cu_offset_and_type. */
22222 per_cu_offset_and_type_hash (const void *item
)
22224 const struct dwarf2_per_cu_offset_and_type
*ofs
22225 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
22227 return (uintptr_t) ofs
->per_cu
+ ofs
->offset
.sect_off
;
22230 /* Equality function for a dwarf2_per_cu_offset_and_type. */
22233 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
22235 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
22236 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
22237 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
22238 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
22240 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
22241 && ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
);
22244 /* Set the type associated with DIE to TYPE. Save it in CU's hash
22245 table if necessary. For convenience, return TYPE.
22247 The DIEs reading must have careful ordering to:
22248 * Not cause infite loops trying to read in DIEs as a prerequisite for
22249 reading current DIE.
22250 * Not trying to dereference contents of still incompletely read in types
22251 while reading in other DIEs.
22252 * Enable referencing still incompletely read in types just by a pointer to
22253 the type without accessing its fields.
22255 Therefore caller should follow these rules:
22256 * Try to fetch any prerequisite types we may need to build this DIE type
22257 before building the type and calling set_die_type.
22258 * After building type call set_die_type for current DIE as soon as
22259 possible before fetching more types to complete the current type.
22260 * Make the type as complete as possible before fetching more types. */
22262 static struct type
*
22263 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
22265 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
22266 struct objfile
*objfile
= cu
->objfile
;
22267 struct attribute
*attr
;
22268 struct dynamic_prop prop
;
22270 /* For Ada types, make sure that the gnat-specific data is always
22271 initialized (if not already set). There are a few types where
22272 we should not be doing so, because the type-specific area is
22273 already used to hold some other piece of info (eg: TYPE_CODE_FLT
22274 where the type-specific area is used to store the floatformat).
22275 But this is not a problem, because the gnat-specific information
22276 is actually not needed for these types. */
22277 if (need_gnat_info (cu
)
22278 && TYPE_CODE (type
) != TYPE_CODE_FUNC
22279 && TYPE_CODE (type
) != TYPE_CODE_FLT
22280 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
22281 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
22282 && TYPE_CODE (type
) != TYPE_CODE_METHOD
22283 && !HAVE_GNAT_AUX_INFO (type
))
22284 INIT_GNAT_SPECIFIC (type
);
22286 /* Read DW_AT_allocated and set in type. */
22287 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
22288 if (attr_form_is_block (attr
))
22290 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
22291 add_dyn_prop (DYN_PROP_ALLOCATED
, prop
, type
, objfile
);
22293 else if (attr
!= NULL
)
22295 complaint (&symfile_complaints
,
22296 _("DW_AT_allocated has the wrong form (%s) at DIE 0x%x"),
22297 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
22298 die
->offset
.sect_off
);
22301 /* Read DW_AT_associated and set in type. */
22302 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
22303 if (attr_form_is_block (attr
))
22305 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
22306 add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
, type
, objfile
);
22308 else if (attr
!= NULL
)
22310 complaint (&symfile_complaints
,
22311 _("DW_AT_associated has the wrong form (%s) at DIE 0x%x"),
22312 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
22313 die
->offset
.sect_off
);
22316 /* Read DW_AT_data_location and set in type. */
22317 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
22318 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
22319 add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
, type
, objfile
);
22321 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
22323 dwarf2_per_objfile
->die_type_hash
=
22324 htab_create_alloc_ex (127,
22325 per_cu_offset_and_type_hash
,
22326 per_cu_offset_and_type_eq
,
22328 &objfile
->objfile_obstack
,
22329 hashtab_obstack_allocate
,
22330 dummy_obstack_deallocate
);
22333 ofs
.per_cu
= cu
->per_cu
;
22334 ofs
.offset
= die
->offset
;
22336 slot
= (struct dwarf2_per_cu_offset_and_type
**)
22337 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
22339 complaint (&symfile_complaints
,
22340 _("A problem internal to GDB: DIE 0x%x has type already set"),
22341 die
->offset
.sect_off
);
22342 *slot
= XOBNEW (&objfile
->objfile_obstack
,
22343 struct dwarf2_per_cu_offset_and_type
);
22348 /* Look up the type for the die at OFFSET in PER_CU in die_type_hash,
22349 or return NULL if the die does not have a saved type. */
22351 static struct type
*
22352 get_die_type_at_offset (sect_offset offset
,
22353 struct dwarf2_per_cu_data
*per_cu
)
22355 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
22357 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
22360 ofs
.per_cu
= per_cu
;
22361 ofs
.offset
= offset
;
22362 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
22363 htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
));
22370 /* Look up the type for DIE in CU in die_type_hash,
22371 or return NULL if DIE does not have a saved type. */
22373 static struct type
*
22374 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22376 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
22379 /* Add a dependence relationship from CU to REF_PER_CU. */
22382 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
22383 struct dwarf2_per_cu_data
*ref_per_cu
)
22387 if (cu
->dependencies
== NULL
)
22389 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
22390 NULL
, &cu
->comp_unit_obstack
,
22391 hashtab_obstack_allocate
,
22392 dummy_obstack_deallocate
);
22394 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
22396 *slot
= ref_per_cu
;
22399 /* Subroutine of dwarf2_mark to pass to htab_traverse.
22400 Set the mark field in every compilation unit in the
22401 cache that we must keep because we are keeping CU. */
22404 dwarf2_mark_helper (void **slot
, void *data
)
22406 struct dwarf2_per_cu_data
*per_cu
;
22408 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
22410 /* cu->dependencies references may not yet have been ever read if QUIT aborts
22411 reading of the chain. As such dependencies remain valid it is not much
22412 useful to track and undo them during QUIT cleanups. */
22413 if (per_cu
->cu
== NULL
)
22416 if (per_cu
->cu
->mark
)
22418 per_cu
->cu
->mark
= 1;
22420 if (per_cu
->cu
->dependencies
!= NULL
)
22421 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
22426 /* Set the mark field in CU and in every other compilation unit in the
22427 cache that we must keep because we are keeping CU. */
22430 dwarf2_mark (struct dwarf2_cu
*cu
)
22435 if (cu
->dependencies
!= NULL
)
22436 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
22440 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
22444 per_cu
->cu
->mark
= 0;
22445 per_cu
= per_cu
->cu
->read_in_chain
;
22449 /* Trivial hash function for partial_die_info: the hash value of a DIE
22450 is its offset in .debug_info for this objfile. */
22453 partial_die_hash (const void *item
)
22455 const struct partial_die_info
*part_die
22456 = (const struct partial_die_info
*) item
;
22458 return part_die
->offset
.sect_off
;
22461 /* Trivial comparison function for partial_die_info structures: two DIEs
22462 are equal if they have the same offset. */
22465 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
22467 const struct partial_die_info
*part_die_lhs
22468 = (const struct partial_die_info
*) item_lhs
;
22469 const struct partial_die_info
*part_die_rhs
22470 = (const struct partial_die_info
*) item_rhs
;
22472 return part_die_lhs
->offset
.sect_off
== part_die_rhs
->offset
.sect_off
;
22475 static struct cmd_list_element
*set_dwarf_cmdlist
;
22476 static struct cmd_list_element
*show_dwarf_cmdlist
;
22479 set_dwarf_cmd (char *args
, int from_tty
)
22481 help_list (set_dwarf_cmdlist
, "maintenance set dwarf ", all_commands
,
22486 show_dwarf_cmd (char *args
, int from_tty
)
22488 cmd_show_list (show_dwarf_cmdlist
, from_tty
, "");
22491 /* Free data associated with OBJFILE, if necessary. */
22494 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
22496 struct dwarf2_per_objfile
*data
= (struct dwarf2_per_objfile
*) d
;
22499 /* Make sure we don't accidentally use dwarf2_per_objfile while
22501 dwarf2_per_objfile
= NULL
;
22503 for (ix
= 0; ix
< data
->n_comp_units
; ++ix
)
22504 VEC_free (dwarf2_per_cu_ptr
, data
->all_comp_units
[ix
]->imported_symtabs
);
22506 for (ix
= 0; ix
< data
->n_type_units
; ++ix
)
22507 VEC_free (dwarf2_per_cu_ptr
,
22508 data
->all_type_units
[ix
]->per_cu
.imported_symtabs
);
22509 xfree (data
->all_type_units
);
22511 VEC_free (dwarf2_section_info_def
, data
->types
);
22513 if (data
->dwo_files
)
22514 free_dwo_files (data
->dwo_files
, objfile
);
22515 if (data
->dwp_file
)
22516 gdb_bfd_unref (data
->dwp_file
->dbfd
);
22518 if (data
->dwz_file
&& data
->dwz_file
->dwz_bfd
)
22519 gdb_bfd_unref (data
->dwz_file
->dwz_bfd
);
22523 /* The "save gdb-index" command. */
22525 /* The contents of the hash table we create when building the string
22527 struct strtab_entry
22529 offset_type offset
;
22533 /* Hash function for a strtab_entry.
22535 Function is used only during write_hash_table so no index format backward
22536 compatibility is needed. */
22539 hash_strtab_entry (const void *e
)
22541 const struct strtab_entry
*entry
= (const struct strtab_entry
*) e
;
22542 return mapped_index_string_hash (INT_MAX
, entry
->str
);
22545 /* Equality function for a strtab_entry. */
22548 eq_strtab_entry (const void *a
, const void *b
)
22550 const struct strtab_entry
*ea
= (const struct strtab_entry
*) a
;
22551 const struct strtab_entry
*eb
= (const struct strtab_entry
*) b
;
22552 return !strcmp (ea
->str
, eb
->str
);
22555 /* Create a strtab_entry hash table. */
22558 create_strtab (void)
22560 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
22561 xfree
, xcalloc
, xfree
);
22564 /* Add a string to the constant pool. Return the string's offset in
22568 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
22571 struct strtab_entry entry
;
22572 struct strtab_entry
*result
;
22575 slot
= htab_find_slot (table
, &entry
, INSERT
);
22577 result
= (struct strtab_entry
*) *slot
;
22580 result
= XNEW (struct strtab_entry
);
22581 result
->offset
= obstack_object_size (cpool
);
22583 obstack_grow_str0 (cpool
, str
);
22586 return result
->offset
;
22589 /* An entry in the symbol table. */
22590 struct symtab_index_entry
22592 /* The name of the symbol. */
22594 /* The offset of the name in the constant pool. */
22595 offset_type index_offset
;
22596 /* A sorted vector of the indices of all the CUs that hold an object
22598 VEC (offset_type
) *cu_indices
;
22601 /* The symbol table. This is a power-of-2-sized hash table. */
22602 struct mapped_symtab
22604 offset_type n_elements
;
22606 struct symtab_index_entry
**data
;
22609 /* Hash function for a symtab_index_entry. */
22612 hash_symtab_entry (const void *e
)
22614 const struct symtab_index_entry
*entry
22615 = (const struct symtab_index_entry
*) e
;
22616 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
22617 sizeof (offset_type
) * VEC_length (offset_type
,
22618 entry
->cu_indices
),
22622 /* Equality function for a symtab_index_entry. */
22625 eq_symtab_entry (const void *a
, const void *b
)
22627 const struct symtab_index_entry
*ea
= (const struct symtab_index_entry
*) a
;
22628 const struct symtab_index_entry
*eb
= (const struct symtab_index_entry
*) b
;
22629 int len
= VEC_length (offset_type
, ea
->cu_indices
);
22630 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
22632 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
22633 VEC_address (offset_type
, eb
->cu_indices
),
22634 sizeof (offset_type
) * len
);
22637 /* Destroy a symtab_index_entry. */
22640 delete_symtab_entry (void *p
)
22642 struct symtab_index_entry
*entry
= (struct symtab_index_entry
*) p
;
22643 VEC_free (offset_type
, entry
->cu_indices
);
22647 /* Create a hash table holding symtab_index_entry objects. */
22650 create_symbol_hash_table (void)
22652 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
22653 delete_symtab_entry
, xcalloc
, xfree
);
22656 /* Create a new mapped symtab object. */
22658 static struct mapped_symtab
*
22659 create_mapped_symtab (void)
22661 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
22662 symtab
->n_elements
= 0;
22663 symtab
->size
= 1024;
22664 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
22668 /* Destroy a mapped_symtab. */
22671 cleanup_mapped_symtab (void *p
)
22673 struct mapped_symtab
*symtab
= (struct mapped_symtab
*) p
;
22674 /* The contents of the array are freed when the other hash table is
22676 xfree (symtab
->data
);
22680 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
22683 Function is used only during write_hash_table so no index format backward
22684 compatibility is needed. */
22686 static struct symtab_index_entry
**
22687 find_slot (struct mapped_symtab
*symtab
, const char *name
)
22689 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
22691 index
= hash
& (symtab
->size
- 1);
22692 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
22696 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
22697 return &symtab
->data
[index
];
22698 index
= (index
+ step
) & (symtab
->size
- 1);
22702 /* Expand SYMTAB's hash table. */
22705 hash_expand (struct mapped_symtab
*symtab
)
22707 offset_type old_size
= symtab
->size
;
22709 struct symtab_index_entry
**old_entries
= symtab
->data
;
22712 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
22714 for (i
= 0; i
< old_size
; ++i
)
22716 if (old_entries
[i
])
22718 struct symtab_index_entry
**slot
= find_slot (symtab
,
22719 old_entries
[i
]->name
);
22720 *slot
= old_entries
[i
];
22724 xfree (old_entries
);
22727 /* Add an entry to SYMTAB. NAME is the name of the symbol.
22728 CU_INDEX is the index of the CU in which the symbol appears.
22729 IS_STATIC is one if the symbol is static, otherwise zero (global). */
22732 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
22733 int is_static
, gdb_index_symbol_kind kind
,
22734 offset_type cu_index
)
22736 struct symtab_index_entry
**slot
;
22737 offset_type cu_index_and_attrs
;
22739 ++symtab
->n_elements
;
22740 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
22741 hash_expand (symtab
);
22743 slot
= find_slot (symtab
, name
);
22746 *slot
= XNEW (struct symtab_index_entry
);
22747 (*slot
)->name
= name
;
22748 /* index_offset is set later. */
22749 (*slot
)->cu_indices
= NULL
;
22752 cu_index_and_attrs
= 0;
22753 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs
, cu_index
);
22754 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs
, is_static
);
22755 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs
, kind
);
22757 /* We don't want to record an index value twice as we want to avoid the
22759 We process all global symbols and then all static symbols
22760 (which would allow us to avoid the duplication by only having to check
22761 the last entry pushed), but a symbol could have multiple kinds in one CU.
22762 To keep things simple we don't worry about the duplication here and
22763 sort and uniqufy the list after we've processed all symbols. */
22764 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index_and_attrs
);
22767 /* qsort helper routine for uniquify_cu_indices. */
22770 offset_type_compare (const void *ap
, const void *bp
)
22772 offset_type a
= *(offset_type
*) ap
;
22773 offset_type b
= *(offset_type
*) bp
;
22775 return (a
> b
) - (b
> a
);
22778 /* Sort and remove duplicates of all symbols' cu_indices lists. */
22781 uniquify_cu_indices (struct mapped_symtab
*symtab
)
22785 for (i
= 0; i
< symtab
->size
; ++i
)
22787 struct symtab_index_entry
*entry
= symtab
->data
[i
];
22790 && entry
->cu_indices
!= NULL
)
22792 unsigned int next_to_insert
, next_to_check
;
22793 offset_type last_value
;
22795 qsort (VEC_address (offset_type
, entry
->cu_indices
),
22796 VEC_length (offset_type
, entry
->cu_indices
),
22797 sizeof (offset_type
), offset_type_compare
);
22799 last_value
= VEC_index (offset_type
, entry
->cu_indices
, 0);
22800 next_to_insert
= 1;
22801 for (next_to_check
= 1;
22802 next_to_check
< VEC_length (offset_type
, entry
->cu_indices
);
22805 if (VEC_index (offset_type
, entry
->cu_indices
, next_to_check
)
22808 last_value
= VEC_index (offset_type
, entry
->cu_indices
,
22810 VEC_replace (offset_type
, entry
->cu_indices
, next_to_insert
,
22815 VEC_truncate (offset_type
, entry
->cu_indices
, next_to_insert
);
22820 /* Add a vector of indices to the constant pool. */
22823 add_indices_to_cpool (htab_t symbol_hash_table
, struct obstack
*cpool
,
22824 struct symtab_index_entry
*entry
)
22828 slot
= htab_find_slot (symbol_hash_table
, entry
, INSERT
);
22831 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
22832 offset_type val
= MAYBE_SWAP (len
);
22837 entry
->index_offset
= obstack_object_size (cpool
);
22839 obstack_grow (cpool
, &val
, sizeof (val
));
22841 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
22844 val
= MAYBE_SWAP (iter
);
22845 obstack_grow (cpool
, &val
, sizeof (val
));
22850 struct symtab_index_entry
*old_entry
22851 = (struct symtab_index_entry
*) *slot
;
22852 entry
->index_offset
= old_entry
->index_offset
;
22855 return entry
->index_offset
;
22858 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
22859 constant pool entries going into the obstack CPOOL. */
22862 write_hash_table (struct mapped_symtab
*symtab
,
22863 struct obstack
*output
, struct obstack
*cpool
)
22866 htab_t symbol_hash_table
;
22869 symbol_hash_table
= create_symbol_hash_table ();
22870 str_table
= create_strtab ();
22872 /* We add all the index vectors to the constant pool first, to
22873 ensure alignment is ok. */
22874 for (i
= 0; i
< symtab
->size
; ++i
)
22876 if (symtab
->data
[i
])
22877 add_indices_to_cpool (symbol_hash_table
, cpool
, symtab
->data
[i
]);
22880 /* Now write out the hash table. */
22881 for (i
= 0; i
< symtab
->size
; ++i
)
22883 offset_type str_off
, vec_off
;
22885 if (symtab
->data
[i
])
22887 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
22888 vec_off
= symtab
->data
[i
]->index_offset
;
22892 /* While 0 is a valid constant pool index, it is not valid
22893 to have 0 for both offsets. */
22898 str_off
= MAYBE_SWAP (str_off
);
22899 vec_off
= MAYBE_SWAP (vec_off
);
22901 obstack_grow (output
, &str_off
, sizeof (str_off
));
22902 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
22905 htab_delete (str_table
);
22906 htab_delete (symbol_hash_table
);
22909 /* Struct to map psymtab to CU index in the index file. */
22910 struct psymtab_cu_index_map
22912 struct partial_symtab
*psymtab
;
22913 unsigned int cu_index
;
22917 hash_psymtab_cu_index (const void *item
)
22919 const struct psymtab_cu_index_map
*map
22920 = (const struct psymtab_cu_index_map
*) item
;
22922 return htab_hash_pointer (map
->psymtab
);
22926 eq_psymtab_cu_index (const void *item_lhs
, const void *item_rhs
)
22928 const struct psymtab_cu_index_map
*lhs
22929 = (const struct psymtab_cu_index_map
*) item_lhs
;
22930 const struct psymtab_cu_index_map
*rhs
22931 = (const struct psymtab_cu_index_map
*) item_rhs
;
22933 return lhs
->psymtab
== rhs
->psymtab
;
22936 /* Helper struct for building the address table. */
22937 struct addrmap_index_data
22939 struct objfile
*objfile
;
22940 struct obstack
*addr_obstack
;
22941 htab_t cu_index_htab
;
22943 /* Non-zero if the previous_* fields are valid.
22944 We can't write an entry until we see the next entry (since it is only then
22945 that we know the end of the entry). */
22946 int previous_valid
;
22947 /* Index of the CU in the table of all CUs in the index file. */
22948 unsigned int previous_cu_index
;
22949 /* Start address of the CU. */
22950 CORE_ADDR previous_cu_start
;
22953 /* Write an address entry to OBSTACK. */
22956 add_address_entry (struct objfile
*objfile
, struct obstack
*obstack
,
22957 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
22959 offset_type cu_index_to_write
;
22961 CORE_ADDR baseaddr
;
22963 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
22965 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
22966 obstack_grow (obstack
, addr
, 8);
22967 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
22968 obstack_grow (obstack
, addr
, 8);
22969 cu_index_to_write
= MAYBE_SWAP (cu_index
);
22970 obstack_grow (obstack
, &cu_index_to_write
, sizeof (offset_type
));
22973 /* Worker function for traversing an addrmap to build the address table. */
22976 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
22978 struct addrmap_index_data
*data
= (struct addrmap_index_data
*) datap
;
22979 struct partial_symtab
*pst
= (struct partial_symtab
*) obj
;
22981 if (data
->previous_valid
)
22982 add_address_entry (data
->objfile
, data
->addr_obstack
,
22983 data
->previous_cu_start
, start_addr
,
22984 data
->previous_cu_index
);
22986 data
->previous_cu_start
= start_addr
;
22989 struct psymtab_cu_index_map find_map
, *map
;
22990 find_map
.psymtab
= pst
;
22991 map
= ((struct psymtab_cu_index_map
*)
22992 htab_find (data
->cu_index_htab
, &find_map
));
22993 gdb_assert (map
!= NULL
);
22994 data
->previous_cu_index
= map
->cu_index
;
22995 data
->previous_valid
= 1;
22998 data
->previous_valid
= 0;
23003 /* Write OBJFILE's address map to OBSTACK.
23004 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
23005 in the index file. */
23008 write_address_map (struct objfile
*objfile
, struct obstack
*obstack
,
23009 htab_t cu_index_htab
)
23011 struct addrmap_index_data addrmap_index_data
;
23013 /* When writing the address table, we have to cope with the fact that
23014 the addrmap iterator only provides the start of a region; we have to
23015 wait until the next invocation to get the start of the next region. */
23017 addrmap_index_data
.objfile
= objfile
;
23018 addrmap_index_data
.addr_obstack
= obstack
;
23019 addrmap_index_data
.cu_index_htab
= cu_index_htab
;
23020 addrmap_index_data
.previous_valid
= 0;
23022 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
23023 &addrmap_index_data
);
23025 /* It's highly unlikely the last entry (end address = 0xff...ff)
23026 is valid, but we should still handle it.
23027 The end address is recorded as the start of the next region, but that
23028 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
23030 if (addrmap_index_data
.previous_valid
)
23031 add_address_entry (objfile
, obstack
,
23032 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
23033 addrmap_index_data
.previous_cu_index
);
23036 /* Return the symbol kind of PSYM. */
23038 static gdb_index_symbol_kind
23039 symbol_kind (struct partial_symbol
*psym
)
23041 domain_enum domain
= PSYMBOL_DOMAIN (psym
);
23042 enum address_class aclass
= PSYMBOL_CLASS (psym
);
23050 return GDB_INDEX_SYMBOL_KIND_FUNCTION
;
23052 return GDB_INDEX_SYMBOL_KIND_TYPE
;
23054 case LOC_CONST_BYTES
:
23055 case LOC_OPTIMIZED_OUT
:
23057 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
23059 /* Note: It's currently impossible to recognize psyms as enum values
23060 short of reading the type info. For now punt. */
23061 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
23063 /* There are other LOC_FOO values that one might want to classify
23064 as variables, but dwarf2read.c doesn't currently use them. */
23065 return GDB_INDEX_SYMBOL_KIND_OTHER
;
23067 case STRUCT_DOMAIN
:
23068 return GDB_INDEX_SYMBOL_KIND_TYPE
;
23070 return GDB_INDEX_SYMBOL_KIND_OTHER
;
23074 /* Add a list of partial symbols to SYMTAB. */
23077 write_psymbols (struct mapped_symtab
*symtab
,
23079 struct partial_symbol
**psymp
,
23081 offset_type cu_index
,
23084 for (; count
-- > 0; ++psymp
)
23086 struct partial_symbol
*psym
= *psymp
;
23089 if (SYMBOL_LANGUAGE (psym
) == language_ada
)
23090 error (_("Ada is not currently supported by the index"));
23092 /* Only add a given psymbol once. */
23093 slot
= htab_find_slot (psyms_seen
, psym
, INSERT
);
23096 gdb_index_symbol_kind kind
= symbol_kind (psym
);
23099 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (psym
),
23100 is_static
, kind
, cu_index
);
23105 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
23106 exception if there is an error. */
23109 write_obstack (FILE *file
, struct obstack
*obstack
)
23111 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
23113 != obstack_object_size (obstack
))
23114 error (_("couldn't data write to file"));
23117 /* A helper struct used when iterating over debug_types. */
23118 struct signatured_type_index_data
23120 struct objfile
*objfile
;
23121 struct mapped_symtab
*symtab
;
23122 struct obstack
*types_list
;
23127 /* A helper function that writes a single signatured_type to an
23131 write_one_signatured_type (void **slot
, void *d
)
23133 struct signatured_type_index_data
*info
23134 = (struct signatured_type_index_data
*) d
;
23135 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
23136 struct partial_symtab
*psymtab
= entry
->per_cu
.v
.psymtab
;
23139 write_psymbols (info
->symtab
,
23141 info
->objfile
->global_psymbols
.list
23142 + psymtab
->globals_offset
,
23143 psymtab
->n_global_syms
, info
->cu_index
,
23145 write_psymbols (info
->symtab
,
23147 info
->objfile
->static_psymbols
.list
23148 + psymtab
->statics_offset
,
23149 psymtab
->n_static_syms
, info
->cu_index
,
23152 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23153 entry
->per_cu
.offset
.sect_off
);
23154 obstack_grow (info
->types_list
, val
, 8);
23155 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23156 entry
->type_offset_in_tu
.cu_off
);
23157 obstack_grow (info
->types_list
, val
, 8);
23158 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
23159 obstack_grow (info
->types_list
, val
, 8);
23166 /* Recurse into all "included" dependencies and write their symbols as
23167 if they appeared in this psymtab. */
23170 recursively_write_psymbols (struct objfile
*objfile
,
23171 struct partial_symtab
*psymtab
,
23172 struct mapped_symtab
*symtab
,
23174 offset_type cu_index
)
23178 for (i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
23179 if (psymtab
->dependencies
[i
]->user
!= NULL
)
23180 recursively_write_psymbols (objfile
, psymtab
->dependencies
[i
],
23181 symtab
, psyms_seen
, cu_index
);
23183 write_psymbols (symtab
,
23185 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
23186 psymtab
->n_global_syms
, cu_index
,
23188 write_psymbols (symtab
,
23190 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
23191 psymtab
->n_static_syms
, cu_index
,
23195 /* Create an index file for OBJFILE in the directory DIR. */
23198 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
23200 struct cleanup
*cleanup
;
23202 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
23203 struct obstack cu_list
, types_cu_list
;
23206 struct mapped_symtab
*symtab
;
23207 offset_type val
, size_of_contents
, total_len
;
23209 struct psymtab_cu_index_map
*psymtab_cu_index_map
;
23211 if (dwarf2_per_objfile
->using_index
)
23212 error (_("Cannot use an index to create the index"));
23214 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
23215 error (_("Cannot make an index when the file has multiple .debug_types sections"));
23217 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
23220 if (stat (objfile_name (objfile
), &st
) < 0)
23221 perror_with_name (objfile_name (objfile
));
23223 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile_name (objfile
)),
23224 INDEX_SUFFIX
, (char *) NULL
);
23225 cleanup
= make_cleanup (xfree
, filename
);
23227 out_file
= gdb_fopen_cloexec (filename
, "wb");
23229 error (_("Can't open `%s' for writing"), filename
);
23231 gdb::unlinker
unlink_file (filename
);
23233 symtab
= create_mapped_symtab ();
23234 make_cleanup (cleanup_mapped_symtab
, symtab
);
23236 obstack_init (&addr_obstack
);
23237 make_cleanup_obstack_free (&addr_obstack
);
23239 obstack_init (&cu_list
);
23240 make_cleanup_obstack_free (&cu_list
);
23242 obstack_init (&types_cu_list
);
23243 make_cleanup_obstack_free (&types_cu_list
);
23245 htab_up
psyms_seen (htab_create_alloc (100, htab_hash_pointer
,
23247 NULL
, xcalloc
, xfree
));
23249 /* While we're scanning CU's create a table that maps a psymtab pointer
23250 (which is what addrmap records) to its index (which is what is recorded
23251 in the index file). This will later be needed to write the address
23253 htab_up
cu_index_htab (htab_create_alloc (100,
23254 hash_psymtab_cu_index
,
23255 eq_psymtab_cu_index
,
23256 NULL
, xcalloc
, xfree
));
23257 psymtab_cu_index_map
= XNEWVEC (struct psymtab_cu_index_map
,
23258 dwarf2_per_objfile
->n_comp_units
);
23259 make_cleanup (xfree
, psymtab_cu_index_map
);
23261 /* The CU list is already sorted, so we don't need to do additional
23262 work here. Also, the debug_types entries do not appear in
23263 all_comp_units, but only in their own hash table. */
23264 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
23266 struct dwarf2_per_cu_data
*per_cu
23267 = dwarf2_per_objfile
->all_comp_units
[i
];
23268 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
23270 struct psymtab_cu_index_map
*map
;
23273 /* CU of a shared file from 'dwz -m' may be unused by this main file.
23274 It may be referenced from a local scope but in such case it does not
23275 need to be present in .gdb_index. */
23276 if (psymtab
== NULL
)
23279 if (psymtab
->user
== NULL
)
23280 recursively_write_psymbols (objfile
, psymtab
, symtab
,
23281 psyms_seen
.get (), i
);
23283 map
= &psymtab_cu_index_map
[i
];
23284 map
->psymtab
= psymtab
;
23286 slot
= htab_find_slot (cu_index_htab
.get (), map
, INSERT
);
23287 gdb_assert (slot
!= NULL
);
23288 gdb_assert (*slot
== NULL
);
23291 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23292 per_cu
->offset
.sect_off
);
23293 obstack_grow (&cu_list
, val
, 8);
23294 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
23295 obstack_grow (&cu_list
, val
, 8);
23298 /* Dump the address map. */
23299 write_address_map (objfile
, &addr_obstack
, cu_index_htab
.get ());
23301 /* Write out the .debug_type entries, if any. */
23302 if (dwarf2_per_objfile
->signatured_types
)
23304 struct signatured_type_index_data sig_data
;
23306 sig_data
.objfile
= objfile
;
23307 sig_data
.symtab
= symtab
;
23308 sig_data
.types_list
= &types_cu_list
;
23309 sig_data
.psyms_seen
= psyms_seen
.get ();
23310 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
23311 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
23312 write_one_signatured_type
, &sig_data
);
23315 /* Now that we've processed all symbols we can shrink their cu_indices
23317 uniquify_cu_indices (symtab
);
23319 obstack_init (&constant_pool
);
23320 make_cleanup_obstack_free (&constant_pool
);
23321 obstack_init (&symtab_obstack
);
23322 make_cleanup_obstack_free (&symtab_obstack
);
23323 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
23325 obstack_init (&contents
);
23326 make_cleanup_obstack_free (&contents
);
23327 size_of_contents
= 6 * sizeof (offset_type
);
23328 total_len
= size_of_contents
;
23330 /* The version number. */
23331 val
= MAYBE_SWAP (8);
23332 obstack_grow (&contents
, &val
, sizeof (val
));
23334 /* The offset of the CU list from the start of the file. */
23335 val
= MAYBE_SWAP (total_len
);
23336 obstack_grow (&contents
, &val
, sizeof (val
));
23337 total_len
+= obstack_object_size (&cu_list
);
23339 /* The offset of the types CU list from the start of the file. */
23340 val
= MAYBE_SWAP (total_len
);
23341 obstack_grow (&contents
, &val
, sizeof (val
));
23342 total_len
+= obstack_object_size (&types_cu_list
);
23344 /* The offset of the address table from the start of the file. */
23345 val
= MAYBE_SWAP (total_len
);
23346 obstack_grow (&contents
, &val
, sizeof (val
));
23347 total_len
+= obstack_object_size (&addr_obstack
);
23349 /* The offset of the symbol table from the start of the file. */
23350 val
= MAYBE_SWAP (total_len
);
23351 obstack_grow (&contents
, &val
, sizeof (val
));
23352 total_len
+= obstack_object_size (&symtab_obstack
);
23354 /* The offset of the constant pool from the start of the file. */
23355 val
= MAYBE_SWAP (total_len
);
23356 obstack_grow (&contents
, &val
, sizeof (val
));
23357 total_len
+= obstack_object_size (&constant_pool
);
23359 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
23361 write_obstack (out_file
, &contents
);
23362 write_obstack (out_file
, &cu_list
);
23363 write_obstack (out_file
, &types_cu_list
);
23364 write_obstack (out_file
, &addr_obstack
);
23365 write_obstack (out_file
, &symtab_obstack
);
23366 write_obstack (out_file
, &constant_pool
);
23370 /* We want to keep the file. */
23371 unlink_file
.keep ();
23373 do_cleanups (cleanup
);
23376 /* Implementation of the `save gdb-index' command.
23378 Note that the file format used by this command is documented in the
23379 GDB manual. Any changes here must be documented there. */
23382 save_gdb_index_command (char *arg
, int from_tty
)
23384 struct objfile
*objfile
;
23387 error (_("usage: save gdb-index DIRECTORY"));
23389 ALL_OBJFILES (objfile
)
23393 /* If the objfile does not correspond to an actual file, skip it. */
23394 if (stat (objfile_name (objfile
), &st
) < 0)
23398 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
23399 dwarf2_objfile_data_key
);
23400 if (dwarf2_per_objfile
)
23405 write_psymtabs_to_index (objfile
, arg
);
23407 CATCH (except
, RETURN_MASK_ERROR
)
23409 exception_fprintf (gdb_stderr
, except
,
23410 _("Error while writing index for `%s': "),
23411 objfile_name (objfile
));
23420 int dwarf_always_disassemble
;
23423 show_dwarf_always_disassemble (struct ui_file
*file
, int from_tty
,
23424 struct cmd_list_element
*c
, const char *value
)
23426 fprintf_filtered (file
,
23427 _("Whether to always disassemble "
23428 "DWARF expressions is %s.\n"),
23433 show_check_physname (struct ui_file
*file
, int from_tty
,
23434 struct cmd_list_element
*c
, const char *value
)
23436 fprintf_filtered (file
,
23437 _("Whether to check \"physname\" is %s.\n"),
23441 void _initialize_dwarf2_read (void);
23444 _initialize_dwarf2_read (void)
23446 struct cmd_list_element
*c
;
23448 dwarf2_objfile_data_key
23449 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
23451 add_prefix_cmd ("dwarf", class_maintenance
, set_dwarf_cmd
, _("\
23452 Set DWARF specific variables.\n\
23453 Configure DWARF variables such as the cache size"),
23454 &set_dwarf_cmdlist
, "maintenance set dwarf ",
23455 0/*allow-unknown*/, &maintenance_set_cmdlist
);
23457 add_prefix_cmd ("dwarf", class_maintenance
, show_dwarf_cmd
, _("\
23458 Show DWARF specific variables\n\
23459 Show DWARF variables such as the cache size"),
23460 &show_dwarf_cmdlist
, "maintenance show dwarf ",
23461 0/*allow-unknown*/, &maintenance_show_cmdlist
);
23463 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
23464 &dwarf_max_cache_age
, _("\
23465 Set the upper bound on the age of cached DWARF compilation units."), _("\
23466 Show the upper bound on the age of cached DWARF compilation units."), _("\
23467 A higher limit means that cached compilation units will be stored\n\
23468 in memory longer, and more total memory will be used. Zero disables\n\
23469 caching, which can slow down startup."),
23471 show_dwarf_max_cache_age
,
23472 &set_dwarf_cmdlist
,
23473 &show_dwarf_cmdlist
);
23475 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
23476 &dwarf_always_disassemble
, _("\
23477 Set whether `info address' always disassembles DWARF expressions."), _("\
23478 Show whether `info address' always disassembles DWARF expressions."), _("\
23479 When enabled, DWARF expressions are always printed in an assembly-like\n\
23480 syntax. When disabled, expressions will be printed in a more\n\
23481 conversational style, when possible."),
23483 show_dwarf_always_disassemble
,
23484 &set_dwarf_cmdlist
,
23485 &show_dwarf_cmdlist
);
23487 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
23488 Set debugging of the DWARF reader."), _("\
23489 Show debugging of the DWARF reader."), _("\
23490 When enabled (non-zero), debugging messages are printed during DWARF\n\
23491 reading and symtab expansion. A value of 1 (one) provides basic\n\
23492 information. A value greater than 1 provides more verbose information."),
23495 &setdebuglist
, &showdebuglist
);
23497 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
23498 Set debugging of the DWARF DIE reader."), _("\
23499 Show debugging of the DWARF DIE reader."), _("\
23500 When enabled (non-zero), DIEs are dumped after they are read in.\n\
23501 The value is the maximum depth to print."),
23504 &setdebuglist
, &showdebuglist
);
23506 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
23507 Set debugging of the dwarf line reader."), _("\
23508 Show debugging of the dwarf line reader."), _("\
23509 When enabled (non-zero), line number entries are dumped as they are read in.\n\
23510 A value of 1 (one) provides basic information.\n\
23511 A value greater than 1 provides more verbose information."),
23514 &setdebuglist
, &showdebuglist
);
23516 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
23517 Set cross-checking of \"physname\" code against demangler."), _("\
23518 Show cross-checking of \"physname\" code against demangler."), _("\
23519 When enabled, GDB's internal \"physname\" code is checked against\n\
23521 NULL
, show_check_physname
,
23522 &setdebuglist
, &showdebuglist
);
23524 add_setshow_boolean_cmd ("use-deprecated-index-sections",
23525 no_class
, &use_deprecated_index_sections
, _("\
23526 Set whether to use deprecated gdb_index sections."), _("\
23527 Show whether to use deprecated gdb_index sections."), _("\
23528 When enabled, deprecated .gdb_index sections are used anyway.\n\
23529 Normally they are ignored either because of a missing feature or\n\
23530 performance issue.\n\
23531 Warning: This option must be enabled before gdb reads the file."),
23534 &setlist
, &showlist
);
23536 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
23538 Save a gdb-index file.\n\
23539 Usage: save gdb-index DIRECTORY"),
23541 set_cmd_completer (c
, filename_completer
);
23543 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23544 &dwarf2_locexpr_funcs
);
23545 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23546 &dwarf2_loclist_funcs
);
23548 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23549 &dwarf2_block_frame_base_locexpr_funcs
);
23550 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23551 &dwarf2_block_frame_base_loclist_funcs
);