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 /* Create the hash table of all entries in the .debug_types
4609 (or .debug_types.dwo) section(s).
4610 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
4611 otherwise it is NULL.
4613 The result is a pointer to the hash table or NULL if there are no types.
4615 Note: This function processes DWO files only, not DWP files. */
4618 create_debug_types_hash_table (struct dwo_file
*dwo_file
,
4619 VEC (dwarf2_section_info_def
) *types
)
4621 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4622 htab_t types_htab
= NULL
;
4624 struct dwarf2_section_info
*section
;
4625 struct dwarf2_section_info
*abbrev_section
;
4627 if (VEC_empty (dwarf2_section_info_def
, types
))
4630 abbrev_section
= (dwo_file
!= NULL
4631 ? &dwo_file
->sections
.abbrev
4632 : &dwarf2_per_objfile
->abbrev
);
4634 if (dwarf_read_debug
)
4635 fprintf_unfiltered (gdb_stdlog
, "Reading .debug_types%s for %s:\n",
4636 dwo_file
? ".dwo" : "",
4637 get_section_file_name (abbrev_section
));
4640 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
4644 const gdb_byte
*info_ptr
, *end_ptr
;
4646 dwarf2_read_section (objfile
, section
);
4647 info_ptr
= section
->buffer
;
4649 if (info_ptr
== NULL
)
4652 /* We can't set abfd until now because the section may be empty or
4653 not present, in which case the bfd is unknown. */
4654 abfd
= get_section_bfd_owner (section
);
4656 /* We don't use init_cutu_and_read_dies_simple, or some such, here
4657 because we don't need to read any dies: the signature is in the
4660 end_ptr
= info_ptr
+ section
->size
;
4661 while (info_ptr
< end_ptr
)
4664 cu_offset type_offset_in_tu
;
4666 struct signatured_type
*sig_type
;
4667 struct dwo_unit
*dwo_tu
;
4669 const gdb_byte
*ptr
= info_ptr
;
4670 struct comp_unit_head header
;
4671 unsigned int length
;
4673 offset
.sect_off
= ptr
- section
->buffer
;
4675 /* We need to read the type's signature in order to build the hash
4676 table, but we don't need anything else just yet. */
4678 ptr
= read_and_check_type_unit_head (&header
, section
,
4679 abbrev_section
, ptr
,
4680 &signature
, &type_offset_in_tu
);
4682 length
= get_cu_length (&header
);
4684 /* Skip dummy type units. */
4685 if (ptr
>= info_ptr
+ length
4686 || peek_abbrev_code (abfd
, ptr
) == 0)
4692 if (types_htab
== NULL
)
4695 types_htab
= allocate_dwo_unit_table (objfile
);
4697 types_htab
= allocate_signatured_type_table (objfile
);
4703 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4705 dwo_tu
->dwo_file
= dwo_file
;
4706 dwo_tu
->signature
= signature
;
4707 dwo_tu
->type_offset_in_tu
= type_offset_in_tu
;
4708 dwo_tu
->section
= section
;
4709 dwo_tu
->offset
= offset
;
4710 dwo_tu
->length
= length
;
4714 /* N.B.: type_offset is not usable if this type uses a DWO file.
4715 The real type_offset is in the DWO file. */
4717 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4718 struct signatured_type
);
4719 sig_type
->signature
= signature
;
4720 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
4721 sig_type
->per_cu
.objfile
= objfile
;
4722 sig_type
->per_cu
.is_debug_types
= 1;
4723 sig_type
->per_cu
.section
= section
;
4724 sig_type
->per_cu
.offset
= offset
;
4725 sig_type
->per_cu
.length
= length
;
4728 slot
= htab_find_slot (types_htab
,
4729 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
4731 gdb_assert (slot
!= NULL
);
4734 sect_offset dup_offset
;
4738 const struct dwo_unit
*dup_tu
4739 = (const struct dwo_unit
*) *slot
;
4741 dup_offset
= dup_tu
->offset
;
4745 const struct signatured_type
*dup_tu
4746 = (const struct signatured_type
*) *slot
;
4748 dup_offset
= dup_tu
->per_cu
.offset
;
4751 complaint (&symfile_complaints
,
4752 _("debug type entry at offset 0x%x is duplicate to"
4753 " the entry at offset 0x%x, signature %s"),
4754 offset
.sect_off
, dup_offset
.sect_off
,
4755 hex_string (signature
));
4757 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
4759 if (dwarf_read_debug
> 1)
4760 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature %s\n",
4762 hex_string (signature
));
4771 /* Create the hash table of all entries in the .debug_types section,
4772 and initialize all_type_units.
4773 The result is zero if there is an error (e.g. missing .debug_types section),
4774 otherwise non-zero. */
4777 create_all_type_units (struct objfile
*objfile
)
4780 struct signatured_type
**iter
;
4782 types_htab
= create_debug_types_hash_table (NULL
, dwarf2_per_objfile
->types
);
4783 if (types_htab
== NULL
)
4785 dwarf2_per_objfile
->signatured_types
= NULL
;
4789 dwarf2_per_objfile
->signatured_types
= types_htab
;
4791 dwarf2_per_objfile
->n_type_units
4792 = dwarf2_per_objfile
->n_allocated_type_units
4793 = htab_elements (types_htab
);
4794 dwarf2_per_objfile
->all_type_units
=
4795 XNEWVEC (struct signatured_type
*, dwarf2_per_objfile
->n_type_units
);
4796 iter
= &dwarf2_per_objfile
->all_type_units
[0];
4797 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
4798 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
4799 == dwarf2_per_objfile
->n_type_units
);
4804 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
4805 If SLOT is non-NULL, it is the entry to use in the hash table.
4806 Otherwise we find one. */
4808 static struct signatured_type
*
4809 add_type_unit (ULONGEST sig
, void **slot
)
4811 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4812 int n_type_units
= dwarf2_per_objfile
->n_type_units
;
4813 struct signatured_type
*sig_type
;
4815 gdb_assert (n_type_units
<= dwarf2_per_objfile
->n_allocated_type_units
);
4817 if (n_type_units
> dwarf2_per_objfile
->n_allocated_type_units
)
4819 if (dwarf2_per_objfile
->n_allocated_type_units
== 0)
4820 dwarf2_per_objfile
->n_allocated_type_units
= 1;
4821 dwarf2_per_objfile
->n_allocated_type_units
*= 2;
4822 dwarf2_per_objfile
->all_type_units
4823 = XRESIZEVEC (struct signatured_type
*,
4824 dwarf2_per_objfile
->all_type_units
,
4825 dwarf2_per_objfile
->n_allocated_type_units
);
4826 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
4828 dwarf2_per_objfile
->n_type_units
= n_type_units
;
4830 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4831 struct signatured_type
);
4832 dwarf2_per_objfile
->all_type_units
[n_type_units
- 1] = sig_type
;
4833 sig_type
->signature
= sig
;
4834 sig_type
->per_cu
.is_debug_types
= 1;
4835 if (dwarf2_per_objfile
->using_index
)
4837 sig_type
->per_cu
.v
.quick
=
4838 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4839 struct dwarf2_per_cu_quick_data
);
4844 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4847 gdb_assert (*slot
== NULL
);
4849 /* The rest of sig_type must be filled in by the caller. */
4853 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
4854 Fill in SIG_ENTRY with DWO_ENTRY. */
4857 fill_in_sig_entry_from_dwo_entry (struct objfile
*objfile
,
4858 struct signatured_type
*sig_entry
,
4859 struct dwo_unit
*dwo_entry
)
4861 /* Make sure we're not clobbering something we don't expect to. */
4862 gdb_assert (! sig_entry
->per_cu
.queued
);
4863 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
4864 if (dwarf2_per_objfile
->using_index
)
4866 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
4867 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
4870 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
4871 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
4872 gdb_assert (sig_entry
->type_offset_in_section
.sect_off
== 0);
4873 gdb_assert (sig_entry
->type_unit_group
== NULL
);
4874 gdb_assert (sig_entry
->dwo_unit
== NULL
);
4876 sig_entry
->per_cu
.section
= dwo_entry
->section
;
4877 sig_entry
->per_cu
.offset
= dwo_entry
->offset
;
4878 sig_entry
->per_cu
.length
= dwo_entry
->length
;
4879 sig_entry
->per_cu
.reading_dwo_directly
= 1;
4880 sig_entry
->per_cu
.objfile
= objfile
;
4881 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
4882 sig_entry
->dwo_unit
= dwo_entry
;
4885 /* Subroutine of lookup_signatured_type.
4886 If we haven't read the TU yet, create the signatured_type data structure
4887 for a TU to be read in directly from a DWO file, bypassing the stub.
4888 This is the "Stay in DWO Optimization": When there is no DWP file and we're
4889 using .gdb_index, then when reading a CU we want to stay in the DWO file
4890 containing that CU. Otherwise we could end up reading several other DWO
4891 files (due to comdat folding) to process the transitive closure of all the
4892 mentioned TUs, and that can be slow. The current DWO file will have every
4893 type signature that it needs.
4894 We only do this for .gdb_index because in the psymtab case we already have
4895 to read all the DWOs to build the type unit groups. */
4897 static struct signatured_type
*
4898 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4900 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4901 struct dwo_file
*dwo_file
;
4902 struct dwo_unit find_dwo_entry
, *dwo_entry
;
4903 struct signatured_type find_sig_entry
, *sig_entry
;
4906 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
4908 /* If TU skeletons have been removed then we may not have read in any
4910 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4912 dwarf2_per_objfile
->signatured_types
4913 = allocate_signatured_type_table (objfile
);
4916 /* We only ever need to read in one copy of a signatured type.
4917 Use the global signatured_types array to do our own comdat-folding
4918 of types. If this is the first time we're reading this TU, and
4919 the TU has an entry in .gdb_index, replace the recorded data from
4920 .gdb_index with this TU. */
4922 find_sig_entry
.signature
= sig
;
4923 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4924 &find_sig_entry
, INSERT
);
4925 sig_entry
= (struct signatured_type
*) *slot
;
4927 /* We can get here with the TU already read, *or* in the process of being
4928 read. Don't reassign the global entry to point to this DWO if that's
4929 the case. Also note that if the TU is already being read, it may not
4930 have come from a DWO, the program may be a mix of Fission-compiled
4931 code and non-Fission-compiled code. */
4933 /* Have we already tried to read this TU?
4934 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
4935 needn't exist in the global table yet). */
4936 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
4939 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
4940 dwo_unit of the TU itself. */
4941 dwo_file
= cu
->dwo_unit
->dwo_file
;
4943 /* Ok, this is the first time we're reading this TU. */
4944 if (dwo_file
->tus
== NULL
)
4946 find_dwo_entry
.signature
= sig
;
4947 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_entry
);
4948 if (dwo_entry
== NULL
)
4951 /* If the global table doesn't have an entry for this TU, add one. */
4952 if (sig_entry
== NULL
)
4953 sig_entry
= add_type_unit (sig
, slot
);
4955 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
4956 sig_entry
->per_cu
.tu_read
= 1;
4960 /* Subroutine of lookup_signatured_type.
4961 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
4962 then try the DWP file. If the TU stub (skeleton) has been removed then
4963 it won't be in .gdb_index. */
4965 static struct signatured_type
*
4966 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4968 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4969 struct dwp_file
*dwp_file
= get_dwp_file ();
4970 struct dwo_unit
*dwo_entry
;
4971 struct signatured_type find_sig_entry
, *sig_entry
;
4974 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
4975 gdb_assert (dwp_file
!= NULL
);
4977 /* If TU skeletons have been removed then we may not have read in any
4979 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4981 dwarf2_per_objfile
->signatured_types
4982 = allocate_signatured_type_table (objfile
);
4985 find_sig_entry
.signature
= sig
;
4986 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4987 &find_sig_entry
, INSERT
);
4988 sig_entry
= (struct signatured_type
*) *slot
;
4990 /* Have we already tried to read this TU?
4991 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
4992 needn't exist in the global table yet). */
4993 if (sig_entry
!= NULL
)
4996 if (dwp_file
->tus
== NULL
)
4998 dwo_entry
= lookup_dwo_unit_in_dwp (dwp_file
, NULL
,
4999 sig
, 1 /* is_debug_types */);
5000 if (dwo_entry
== NULL
)
5003 sig_entry
= add_type_unit (sig
, slot
);
5004 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
5009 /* Lookup a signature based type for DW_FORM_ref_sig8.
5010 Returns NULL if signature SIG is not present in the table.
5011 It is up to the caller to complain about this. */
5013 static struct signatured_type
*
5014 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
5017 && dwarf2_per_objfile
->using_index
)
5019 /* We're in a DWO/DWP file, and we're using .gdb_index.
5020 These cases require special processing. */
5021 if (get_dwp_file () == NULL
)
5022 return lookup_dwo_signatured_type (cu
, sig
);
5024 return lookup_dwp_signatured_type (cu
, sig
);
5028 struct signatured_type find_entry
, *entry
;
5030 if (dwarf2_per_objfile
->signatured_types
== NULL
)
5032 find_entry
.signature
= sig
;
5033 entry
= ((struct signatured_type
*)
5034 htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
));
5039 /* Low level DIE reading support. */
5041 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
5044 init_cu_die_reader (struct die_reader_specs
*reader
,
5045 struct dwarf2_cu
*cu
,
5046 struct dwarf2_section_info
*section
,
5047 struct dwo_file
*dwo_file
)
5049 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
5050 reader
->abfd
= get_section_bfd_owner (section
);
5052 reader
->dwo_file
= dwo_file
;
5053 reader
->die_section
= section
;
5054 reader
->buffer
= section
->buffer
;
5055 reader
->buffer_end
= section
->buffer
+ section
->size
;
5056 reader
->comp_dir
= NULL
;
5059 /* Subroutine of init_cutu_and_read_dies to simplify it.
5060 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
5061 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
5064 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
5065 from it to the DIE in the DWO. If NULL we are skipping the stub.
5066 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
5067 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
5068 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
5069 STUB_COMP_DIR may be non-NULL.
5070 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
5071 are filled in with the info of the DIE from the DWO file.
5072 ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies
5073 provided an abbrev table to use.
5074 The result is non-zero if a valid (non-dummy) DIE was found. */
5077 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
5078 struct dwo_unit
*dwo_unit
,
5079 int abbrev_table_provided
,
5080 struct die_info
*stub_comp_unit_die
,
5081 const char *stub_comp_dir
,
5082 struct die_reader_specs
*result_reader
,
5083 const gdb_byte
**result_info_ptr
,
5084 struct die_info
**result_comp_unit_die
,
5085 int *result_has_children
)
5087 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5088 struct dwarf2_cu
*cu
= this_cu
->cu
;
5089 struct dwarf2_section_info
*section
;
5091 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5092 ULONGEST signature
; /* Or dwo_id. */
5093 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
5094 int i
,num_extra_attrs
;
5095 struct dwarf2_section_info
*dwo_abbrev_section
;
5096 struct attribute
*attr
;
5097 struct die_info
*comp_unit_die
;
5099 /* At most one of these may be provided. */
5100 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
5102 /* These attributes aren't processed until later:
5103 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
5104 DW_AT_comp_dir is used now, to find the DWO file, but it is also
5105 referenced later. However, these attributes are found in the stub
5106 which we won't have later. In order to not impose this complication
5107 on the rest of the code, we read them here and copy them to the
5116 if (stub_comp_unit_die
!= NULL
)
5118 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
5120 if (! this_cu
->is_debug_types
)
5121 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
5122 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
5123 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
5124 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
5125 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
5127 /* There should be a DW_AT_addr_base attribute here (if needed).
5128 We need the value before we can process DW_FORM_GNU_addr_index. */
5130 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
5132 cu
->addr_base
= DW_UNSND (attr
);
5134 /* There should be a DW_AT_ranges_base attribute here (if needed).
5135 We need the value before we can process DW_AT_ranges. */
5136 cu
->ranges_base
= 0;
5137 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
5139 cu
->ranges_base
= DW_UNSND (attr
);
5141 else if (stub_comp_dir
!= NULL
)
5143 /* Reconstruct the comp_dir attribute to simplify the code below. */
5144 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
5145 comp_dir
->name
= DW_AT_comp_dir
;
5146 comp_dir
->form
= DW_FORM_string
;
5147 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
5148 DW_STRING (comp_dir
) = stub_comp_dir
;
5151 /* Set up for reading the DWO CU/TU. */
5152 cu
->dwo_unit
= dwo_unit
;
5153 section
= dwo_unit
->section
;
5154 dwarf2_read_section (objfile
, section
);
5155 abfd
= get_section_bfd_owner (section
);
5156 begin_info_ptr
= info_ptr
= section
->buffer
+ dwo_unit
->offset
.sect_off
;
5157 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
5158 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
);
5160 if (this_cu
->is_debug_types
)
5162 ULONGEST header_signature
;
5163 cu_offset type_offset_in_tu
;
5164 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
5166 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
5170 &type_offset_in_tu
);
5171 /* This is not an assert because it can be caused by bad debug info. */
5172 if (sig_type
->signature
!= header_signature
)
5174 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
5175 " TU at offset 0x%x [in module %s]"),
5176 hex_string (sig_type
->signature
),
5177 hex_string (header_signature
),
5178 dwo_unit
->offset
.sect_off
,
5179 bfd_get_filename (abfd
));
5181 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5182 /* For DWOs coming from DWP files, we don't know the CU length
5183 nor the type's offset in the TU until now. */
5184 dwo_unit
->length
= get_cu_length (&cu
->header
);
5185 dwo_unit
->type_offset_in_tu
= type_offset_in_tu
;
5187 /* Establish the type offset that can be used to lookup the type.
5188 For DWO files, we don't know it until now. */
5189 sig_type
->type_offset_in_section
.sect_off
=
5190 dwo_unit
->offset
.sect_off
+ dwo_unit
->type_offset_in_tu
.cu_off
;
5194 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5197 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5198 /* For DWOs coming from DWP files, we don't know the CU length
5200 dwo_unit
->length
= get_cu_length (&cu
->header
);
5203 /* Replace the CU's original abbrev table with the DWO's.
5204 Reminder: We can't read the abbrev table until we've read the header. */
5205 if (abbrev_table_provided
)
5207 /* Don't free the provided abbrev table, the caller of
5208 init_cutu_and_read_dies owns it. */
5209 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5210 /* Ensure the DWO abbrev table gets freed. */
5211 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5215 dwarf2_free_abbrev_table (cu
);
5216 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5217 /* Leave any existing abbrev table cleanup as is. */
5220 /* Read in the die, but leave space to copy over the attributes
5221 from the stub. This has the benefit of simplifying the rest of
5222 the code - all the work to maintain the illusion of a single
5223 DW_TAG_{compile,type}_unit DIE is done here. */
5224 num_extra_attrs
= ((stmt_list
!= NULL
)
5228 + (comp_dir
!= NULL
));
5229 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
5230 result_has_children
, num_extra_attrs
);
5232 /* Copy over the attributes from the stub to the DIE we just read in. */
5233 comp_unit_die
= *result_comp_unit_die
;
5234 i
= comp_unit_die
->num_attrs
;
5235 if (stmt_list
!= NULL
)
5236 comp_unit_die
->attrs
[i
++] = *stmt_list
;
5238 comp_unit_die
->attrs
[i
++] = *low_pc
;
5239 if (high_pc
!= NULL
)
5240 comp_unit_die
->attrs
[i
++] = *high_pc
;
5242 comp_unit_die
->attrs
[i
++] = *ranges
;
5243 if (comp_dir
!= NULL
)
5244 comp_unit_die
->attrs
[i
++] = *comp_dir
;
5245 comp_unit_die
->num_attrs
+= num_extra_attrs
;
5247 if (dwarf_die_debug
)
5249 fprintf_unfiltered (gdb_stdlog
,
5250 "Read die from %s@0x%x of %s:\n",
5251 get_section_name (section
),
5252 (unsigned) (begin_info_ptr
- section
->buffer
),
5253 bfd_get_filename (abfd
));
5254 dump_die (comp_unit_die
, dwarf_die_debug
);
5257 /* Save the comp_dir attribute. If there is no DWP file then we'll read
5258 TUs by skipping the stub and going directly to the entry in the DWO file.
5259 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
5260 to get it via circuitous means. Blech. */
5261 if (comp_dir
!= NULL
)
5262 result_reader
->comp_dir
= DW_STRING (comp_dir
);
5264 /* Skip dummy compilation units. */
5265 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
5266 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5269 *result_info_ptr
= info_ptr
;
5273 /* Subroutine of init_cutu_and_read_dies to simplify it.
5274 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
5275 Returns NULL if the specified DWO unit cannot be found. */
5277 static struct dwo_unit
*
5278 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
5279 struct die_info
*comp_unit_die
)
5281 struct dwarf2_cu
*cu
= this_cu
->cu
;
5282 struct attribute
*attr
;
5284 struct dwo_unit
*dwo_unit
;
5285 const char *comp_dir
, *dwo_name
;
5287 gdb_assert (cu
!= NULL
);
5289 /* Yeah, we look dwo_name up again, but it simplifies the code. */
5290 dwo_name
= dwarf2_string_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5291 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
5293 if (this_cu
->is_debug_types
)
5295 struct signatured_type
*sig_type
;
5297 /* Since this_cu is the first member of struct signatured_type,
5298 we can go from a pointer to one to a pointer to the other. */
5299 sig_type
= (struct signatured_type
*) this_cu
;
5300 signature
= sig_type
->signature
;
5301 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
5305 struct attribute
*attr
;
5307 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
5309 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
5311 dwo_name
, objfile_name (this_cu
->objfile
));
5312 signature
= DW_UNSND (attr
);
5313 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
5320 /* Subroutine of init_cutu_and_read_dies to simplify it.
5321 See it for a description of the parameters.
5322 Read a TU directly from a DWO file, bypassing the stub.
5324 Note: This function could be a little bit simpler if we shared cleanups
5325 with our caller, init_cutu_and_read_dies. That's generally a fragile thing
5326 to do, so we keep this function self-contained. Or we could move this
5327 into our caller, but it's complex enough already. */
5330 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
5331 int use_existing_cu
, int keep
,
5332 die_reader_func_ftype
*die_reader_func
,
5335 struct dwarf2_cu
*cu
;
5336 struct signatured_type
*sig_type
;
5337 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5338 struct die_reader_specs reader
;
5339 const gdb_byte
*info_ptr
;
5340 struct die_info
*comp_unit_die
;
5343 /* Verify we can do the following downcast, and that we have the
5345 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
5346 sig_type
= (struct signatured_type
*) this_cu
;
5347 gdb_assert (sig_type
->dwo_unit
!= NULL
);
5349 cleanups
= make_cleanup (null_cleanup
, NULL
);
5351 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5353 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
5355 /* There's no need to do the rereading_dwo_cu handling that
5356 init_cutu_and_read_dies does since we don't read the stub. */
5360 /* If !use_existing_cu, this_cu->cu must be NULL. */
5361 gdb_assert (this_cu
->cu
== NULL
);
5362 cu
= XNEW (struct dwarf2_cu
);
5363 init_one_comp_unit (cu
, this_cu
);
5364 /* If an error occurs while loading, release our storage. */
5365 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5368 /* A future optimization, if needed, would be to use an existing
5369 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
5370 could share abbrev tables. */
5372 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
5373 0 /* abbrev_table_provided */,
5374 NULL
/* stub_comp_unit_die */,
5375 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
5377 &comp_unit_die
, &has_children
) == 0)
5380 do_cleanups (cleanups
);
5384 /* All the "real" work is done here. */
5385 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5387 /* This duplicates the code in init_cutu_and_read_dies,
5388 but the alternative is making the latter more complex.
5389 This function is only for the special case of using DWO files directly:
5390 no point in overly complicating the general case just to handle this. */
5391 if (free_cu_cleanup
!= NULL
)
5395 /* We've successfully allocated this compilation unit. Let our
5396 caller clean it up when finished with it. */
5397 discard_cleanups (free_cu_cleanup
);
5399 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5400 So we have to manually free the abbrev table. */
5401 dwarf2_free_abbrev_table (cu
);
5403 /* Link this CU into read_in_chain. */
5404 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5405 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5408 do_cleanups (free_cu_cleanup
);
5411 do_cleanups (cleanups
);
5414 /* Initialize a CU (or TU) and read its DIEs.
5415 If the CU defers to a DWO file, read the DWO file as well.
5417 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
5418 Otherwise the table specified in the comp unit header is read in and used.
5419 This is an optimization for when we already have the abbrev table.
5421 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
5422 Otherwise, a new CU is allocated with xmalloc.
5424 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
5425 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
5427 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5428 linker) then DIE_READER_FUNC will not get called. */
5431 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
5432 struct abbrev_table
*abbrev_table
,
5433 int use_existing_cu
, int keep
,
5434 die_reader_func_ftype
*die_reader_func
,
5437 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5438 struct dwarf2_section_info
*section
= this_cu
->section
;
5439 bfd
*abfd
= get_section_bfd_owner (section
);
5440 struct dwarf2_cu
*cu
;
5441 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5442 struct die_reader_specs reader
;
5443 struct die_info
*comp_unit_die
;
5445 struct attribute
*attr
;
5446 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5447 struct signatured_type
*sig_type
= NULL
;
5448 struct dwarf2_section_info
*abbrev_section
;
5449 /* Non-zero if CU currently points to a DWO file and we need to
5450 reread it. When this happens we need to reread the skeleton die
5451 before we can reread the DWO file (this only applies to CUs, not TUs). */
5452 int rereading_dwo_cu
= 0;
5454 if (dwarf_die_debug
)
5455 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5456 this_cu
->is_debug_types
? "type" : "comp",
5457 this_cu
->offset
.sect_off
);
5459 if (use_existing_cu
)
5462 /* If we're reading a TU directly from a DWO file, including a virtual DWO
5463 file (instead of going through the stub), short-circuit all of this. */
5464 if (this_cu
->reading_dwo_directly
)
5466 /* Narrow down the scope of possibilities to have to understand. */
5467 gdb_assert (this_cu
->is_debug_types
);
5468 gdb_assert (abbrev_table
== NULL
);
5469 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
, keep
,
5470 die_reader_func
, data
);
5474 cleanups
= make_cleanup (null_cleanup
, NULL
);
5476 /* This is cheap if the section is already read in. */
5477 dwarf2_read_section (objfile
, section
);
5479 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
5481 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
5483 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5486 /* If this CU is from a DWO file we need to start over, we need to
5487 refetch the attributes from the skeleton CU.
5488 This could be optimized by retrieving those attributes from when we
5489 were here the first time: the previous comp_unit_die was stored in
5490 comp_unit_obstack. But there's no data yet that we need this
5492 if (cu
->dwo_unit
!= NULL
)
5493 rereading_dwo_cu
= 1;
5497 /* If !use_existing_cu, this_cu->cu must be NULL. */
5498 gdb_assert (this_cu
->cu
== NULL
);
5499 cu
= XNEW (struct dwarf2_cu
);
5500 init_one_comp_unit (cu
, this_cu
);
5501 /* If an error occurs while loading, release our storage. */
5502 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5505 /* Get the header. */
5506 if (cu
->header
.first_die_offset
.cu_off
!= 0 && ! rereading_dwo_cu
)
5508 /* We already have the header, there's no need to read it in again. */
5509 info_ptr
+= cu
->header
.first_die_offset
.cu_off
;
5513 if (this_cu
->is_debug_types
)
5516 cu_offset type_offset_in_tu
;
5518 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
5519 abbrev_section
, info_ptr
,
5521 &type_offset_in_tu
);
5523 /* Since per_cu is the first member of struct signatured_type,
5524 we can go from a pointer to one to a pointer to the other. */
5525 sig_type
= (struct signatured_type
*) this_cu
;
5526 gdb_assert (sig_type
->signature
== signature
);
5527 gdb_assert (sig_type
->type_offset_in_tu
.cu_off
5528 == type_offset_in_tu
.cu_off
);
5529 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5531 /* LENGTH has not been set yet for type units if we're
5532 using .gdb_index. */
5533 this_cu
->length
= get_cu_length (&cu
->header
);
5535 /* Establish the type offset that can be used to lookup the type. */
5536 sig_type
->type_offset_in_section
.sect_off
=
5537 this_cu
->offset
.sect_off
+ sig_type
->type_offset_in_tu
.cu_off
;
5541 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5545 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5546 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
5550 /* Skip dummy compilation units. */
5551 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5552 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5554 do_cleanups (cleanups
);
5558 /* If we don't have them yet, read the abbrevs for this compilation unit.
5559 And if we need to read them now, make sure they're freed when we're
5560 done. Note that it's important that if the CU had an abbrev table
5561 on entry we don't free it when we're done: Somewhere up the call stack
5562 it may be in use. */
5563 if (abbrev_table
!= NULL
)
5565 gdb_assert (cu
->abbrev_table
== NULL
);
5566 gdb_assert (cu
->header
.abbrev_offset
.sect_off
5567 == abbrev_table
->offset
.sect_off
);
5568 cu
->abbrev_table
= abbrev_table
;
5570 else if (cu
->abbrev_table
== NULL
)
5572 dwarf2_read_abbrevs (cu
, abbrev_section
);
5573 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5575 else if (rereading_dwo_cu
)
5577 dwarf2_free_abbrev_table (cu
);
5578 dwarf2_read_abbrevs (cu
, abbrev_section
);
5581 /* Read the top level CU/TU die. */
5582 init_cu_die_reader (&reader
, cu
, section
, NULL
);
5583 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5585 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
5587 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
5588 DWO CU, that this test will fail (the attribute will not be present). */
5589 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5592 struct dwo_unit
*dwo_unit
;
5593 struct die_info
*dwo_comp_unit_die
;
5597 complaint (&symfile_complaints
,
5598 _("compilation unit with DW_AT_GNU_dwo_name"
5599 " has children (offset 0x%x) [in module %s]"),
5600 this_cu
->offset
.sect_off
, bfd_get_filename (abfd
));
5602 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
);
5603 if (dwo_unit
!= NULL
)
5605 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
5606 abbrev_table
!= NULL
,
5607 comp_unit_die
, NULL
,
5609 &dwo_comp_unit_die
, &has_children
) == 0)
5612 do_cleanups (cleanups
);
5615 comp_unit_die
= dwo_comp_unit_die
;
5619 /* Yikes, we couldn't find the rest of the DIE, we only have
5620 the stub. A complaint has already been logged. There's
5621 not much more we can do except pass on the stub DIE to
5622 die_reader_func. We don't want to throw an error on bad
5627 /* All of the above is setup for this call. Yikes. */
5628 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5630 /* Done, clean up. */
5631 if (free_cu_cleanup
!= NULL
)
5635 /* We've successfully allocated this compilation unit. Let our
5636 caller clean it up when finished with it. */
5637 discard_cleanups (free_cu_cleanup
);
5639 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5640 So we have to manually free the abbrev table. */
5641 dwarf2_free_abbrev_table (cu
);
5643 /* Link this CU into read_in_chain. */
5644 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5645 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5648 do_cleanups (free_cu_cleanup
);
5651 do_cleanups (cleanups
);
5654 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present.
5655 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed
5656 to have already done the lookup to find the DWO file).
5658 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
5659 THIS_CU->is_debug_types, but nothing else.
5661 We fill in THIS_CU->length.
5663 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5664 linker) then DIE_READER_FUNC will not get called.
5666 THIS_CU->cu is always freed when done.
5667 This is done in order to not leave THIS_CU->cu in a state where we have
5668 to care whether it refers to the "main" CU or the DWO CU. */
5671 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
5672 struct dwo_file
*dwo_file
,
5673 die_reader_func_ftype
*die_reader_func
,
5676 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5677 struct dwarf2_section_info
*section
= this_cu
->section
;
5678 bfd
*abfd
= get_section_bfd_owner (section
);
5679 struct dwarf2_section_info
*abbrev_section
;
5680 struct dwarf2_cu cu
;
5681 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5682 struct die_reader_specs reader
;
5683 struct cleanup
*cleanups
;
5684 struct die_info
*comp_unit_die
;
5687 if (dwarf_die_debug
)
5688 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5689 this_cu
->is_debug_types
? "type" : "comp",
5690 this_cu
->offset
.sect_off
);
5692 gdb_assert (this_cu
->cu
== NULL
);
5694 abbrev_section
= (dwo_file
!= NULL
5695 ? &dwo_file
->sections
.abbrev
5696 : get_abbrev_section_for_cu (this_cu
));
5698 /* This is cheap if the section is already read in. */
5699 dwarf2_read_section (objfile
, section
);
5701 init_one_comp_unit (&cu
, this_cu
);
5703 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
5705 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
5706 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, section
,
5707 abbrev_section
, info_ptr
,
5708 this_cu
->is_debug_types
);
5710 this_cu
->length
= get_cu_length (&cu
.header
);
5712 /* Skip dummy compilation units. */
5713 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5714 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5716 do_cleanups (cleanups
);
5720 dwarf2_read_abbrevs (&cu
, abbrev_section
);
5721 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
5723 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
);
5724 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5726 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5728 do_cleanups (cleanups
);
5731 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
5732 does not lookup the specified DWO file.
5733 This cannot be used to read DWO files.
5735 THIS_CU->cu is always freed when done.
5736 This is done in order to not leave THIS_CU->cu in a state where we have
5737 to care whether it refers to the "main" CU or the DWO CU.
5738 We can revisit this if the data shows there's a performance issue. */
5741 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
5742 die_reader_func_ftype
*die_reader_func
,
5745 init_cutu_and_read_dies_no_follow (this_cu
, NULL
, die_reader_func
, data
);
5748 /* Type Unit Groups.
5750 Type Unit Groups are a way to collapse the set of all TUs (type units) into
5751 a more manageable set. The grouping is done by DW_AT_stmt_list entry
5752 so that all types coming from the same compilation (.o file) are grouped
5753 together. A future step could be to put the types in the same symtab as
5754 the CU the types ultimately came from. */
5757 hash_type_unit_group (const void *item
)
5759 const struct type_unit_group
*tu_group
5760 = (const struct type_unit_group
*) item
;
5762 return hash_stmt_list_entry (&tu_group
->hash
);
5766 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
5768 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
5769 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
5771 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
5774 /* Allocate a hash table for type unit groups. */
5777 allocate_type_unit_groups_table (void)
5779 return htab_create_alloc_ex (3,
5780 hash_type_unit_group
,
5783 &dwarf2_per_objfile
->objfile
->objfile_obstack
,
5784 hashtab_obstack_allocate
,
5785 dummy_obstack_deallocate
);
5788 /* Type units that don't have DW_AT_stmt_list are grouped into their own
5789 partial symtabs. We combine several TUs per psymtab to not let the size
5790 of any one psymtab grow too big. */
5791 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
5792 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
5794 /* Helper routine for get_type_unit_group.
5795 Create the type_unit_group object used to hold one or more TUs. */
5797 static struct type_unit_group
*
5798 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
5800 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5801 struct dwarf2_per_cu_data
*per_cu
;
5802 struct type_unit_group
*tu_group
;
5804 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5805 struct type_unit_group
);
5806 per_cu
= &tu_group
->per_cu
;
5807 per_cu
->objfile
= objfile
;
5809 if (dwarf2_per_objfile
->using_index
)
5811 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5812 struct dwarf2_per_cu_quick_data
);
5816 unsigned int line_offset
= line_offset_struct
.sect_off
;
5817 struct partial_symtab
*pst
;
5820 /* Give the symtab a useful name for debug purposes. */
5821 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
5822 name
= xstrprintf ("<type_units_%d>",
5823 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
5825 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
5827 pst
= create_partial_symtab (per_cu
, name
);
5833 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
5834 tu_group
->hash
.line_offset
= line_offset_struct
;
5839 /* Look up the type_unit_group for type unit CU, and create it if necessary.
5840 STMT_LIST is a DW_AT_stmt_list attribute. */
5842 static struct type_unit_group
*
5843 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
5845 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
5846 struct type_unit_group
*tu_group
;
5848 unsigned int line_offset
;
5849 struct type_unit_group type_unit_group_for_lookup
;
5851 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
5853 dwarf2_per_objfile
->type_unit_groups
=
5854 allocate_type_unit_groups_table ();
5857 /* Do we need to create a new group, or can we use an existing one? */
5861 line_offset
= DW_UNSND (stmt_list
);
5862 ++tu_stats
->nr_symtab_sharers
;
5866 /* Ugh, no stmt_list. Rare, but we have to handle it.
5867 We can do various things here like create one group per TU or
5868 spread them over multiple groups to split up the expansion work.
5869 To avoid worst case scenarios (too many groups or too large groups)
5870 we, umm, group them in bunches. */
5871 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
5872 | (tu_stats
->nr_stmt_less_type_units
5873 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
5874 ++tu_stats
->nr_stmt_less_type_units
;
5877 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
5878 type_unit_group_for_lookup
.hash
.line_offset
.sect_off
= line_offset
;
5879 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
5880 &type_unit_group_for_lookup
, INSERT
);
5883 tu_group
= (struct type_unit_group
*) *slot
;
5884 gdb_assert (tu_group
!= NULL
);
5888 sect_offset line_offset_struct
;
5890 line_offset_struct
.sect_off
= line_offset
;
5891 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
5893 ++tu_stats
->nr_symtabs
;
5899 /* Partial symbol tables. */
5901 /* Create a psymtab named NAME and assign it to PER_CU.
5903 The caller must fill in the following details:
5904 dirname, textlow, texthigh. */
5906 static struct partial_symtab
*
5907 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
5909 struct objfile
*objfile
= per_cu
->objfile
;
5910 struct partial_symtab
*pst
;
5912 pst
= start_psymtab_common (objfile
, name
, 0,
5913 objfile
->global_psymbols
.next
,
5914 objfile
->static_psymbols
.next
);
5916 pst
->psymtabs_addrmap_supported
= 1;
5918 /* This is the glue that links PST into GDB's symbol API. */
5919 pst
->read_symtab_private
= per_cu
;
5920 pst
->read_symtab
= dwarf2_read_symtab
;
5921 per_cu
->v
.psymtab
= pst
;
5926 /* The DATA object passed to process_psymtab_comp_unit_reader has this
5929 struct process_psymtab_comp_unit_data
5931 /* True if we are reading a DW_TAG_partial_unit. */
5933 int want_partial_unit
;
5935 /* The "pretend" language that is used if the CU doesn't declare a
5938 enum language pretend_language
;
5941 /* die_reader_func for process_psymtab_comp_unit. */
5944 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
5945 const gdb_byte
*info_ptr
,
5946 struct die_info
*comp_unit_die
,
5950 struct dwarf2_cu
*cu
= reader
->cu
;
5951 struct objfile
*objfile
= cu
->objfile
;
5952 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
5953 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
5955 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
5956 struct partial_symtab
*pst
;
5957 enum pc_bounds_kind cu_bounds_kind
;
5958 const char *filename
;
5959 struct process_psymtab_comp_unit_data
*info
5960 = (struct process_psymtab_comp_unit_data
*) data
;
5962 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !info
->want_partial_unit
)
5965 gdb_assert (! per_cu
->is_debug_types
);
5967 prepare_one_comp_unit (cu
, comp_unit_die
, info
->pretend_language
);
5969 cu
->list_in_scope
= &file_symbols
;
5971 /* Allocate a new partial symbol table structure. */
5972 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
5973 if (filename
== NULL
)
5976 pst
= create_partial_symtab (per_cu
, filename
);
5978 /* This must be done before calling dwarf2_build_include_psymtabs. */
5979 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
5981 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5983 dwarf2_find_base_address (comp_unit_die
, cu
);
5985 /* Possibly set the default values of LOWPC and HIGHPC from
5987 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
5988 &best_highpc
, cu
, pst
);
5989 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
5990 /* Store the contiguous range if it is not empty; it can be empty for
5991 CUs with no code. */
5992 addrmap_set_empty (objfile
->psymtabs_addrmap
,
5993 gdbarch_adjust_dwarf2_addr (gdbarch
,
5994 best_lowpc
+ baseaddr
),
5995 gdbarch_adjust_dwarf2_addr (gdbarch
,
5996 best_highpc
+ baseaddr
) - 1,
5999 /* Check if comp unit has_children.
6000 If so, read the rest of the partial symbols from this comp unit.
6001 If not, there's no more debug_info for this comp unit. */
6004 struct partial_die_info
*first_die
;
6005 CORE_ADDR lowpc
, highpc
;
6007 lowpc
= ((CORE_ADDR
) -1);
6008 highpc
= ((CORE_ADDR
) 0);
6010 first_die
= load_partial_dies (reader
, info_ptr
, 1);
6012 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
6013 cu_bounds_kind
<= PC_BOUNDS_INVALID
, cu
);
6015 /* If we didn't find a lowpc, set it to highpc to avoid
6016 complaints from `maint check'. */
6017 if (lowpc
== ((CORE_ADDR
) -1))
6020 /* If the compilation unit didn't have an explicit address range,
6021 then use the information extracted from its child dies. */
6022 if (cu_bounds_kind
<= PC_BOUNDS_INVALID
)
6025 best_highpc
= highpc
;
6028 pst
->textlow
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
);
6029 pst
->texthigh
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
);
6031 end_psymtab_common (objfile
, pst
);
6033 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
6036 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
6037 struct dwarf2_per_cu_data
*iter
;
6039 /* Fill in 'dependencies' here; we fill in 'users' in a
6041 pst
->number_of_dependencies
= len
;
6043 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
6045 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
6048 pst
->dependencies
[i
] = iter
->v
.psymtab
;
6050 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
6053 /* Get the list of files included in the current compilation unit,
6054 and build a psymtab for each of them. */
6055 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
6057 if (dwarf_read_debug
)
6059 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6061 fprintf_unfiltered (gdb_stdlog
,
6062 "Psymtab for %s unit @0x%x: %s - %s"
6063 ", %d global, %d static syms\n",
6064 per_cu
->is_debug_types
? "type" : "comp",
6065 per_cu
->offset
.sect_off
,
6066 paddress (gdbarch
, pst
->textlow
),
6067 paddress (gdbarch
, pst
->texthigh
),
6068 pst
->n_global_syms
, pst
->n_static_syms
);
6072 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6073 Process compilation unit THIS_CU for a psymtab. */
6076 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
6077 int want_partial_unit
,
6078 enum language pretend_language
)
6080 struct process_psymtab_comp_unit_data info
;
6082 /* If this compilation unit was already read in, free the
6083 cached copy in order to read it in again. This is
6084 necessary because we skipped some symbols when we first
6085 read in the compilation unit (see load_partial_dies).
6086 This problem could be avoided, but the benefit is unclear. */
6087 if (this_cu
->cu
!= NULL
)
6088 free_one_cached_comp_unit (this_cu
);
6090 gdb_assert (! this_cu
->is_debug_types
);
6091 info
.want_partial_unit
= want_partial_unit
;
6092 info
.pretend_language
= pretend_language
;
6093 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0,
6094 process_psymtab_comp_unit_reader
,
6097 /* Age out any secondary CUs. */
6098 age_cached_comp_units ();
6101 /* Reader function for build_type_psymtabs. */
6104 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
6105 const gdb_byte
*info_ptr
,
6106 struct die_info
*type_unit_die
,
6110 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6111 struct dwarf2_cu
*cu
= reader
->cu
;
6112 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
6113 struct signatured_type
*sig_type
;
6114 struct type_unit_group
*tu_group
;
6115 struct attribute
*attr
;
6116 struct partial_die_info
*first_die
;
6117 CORE_ADDR lowpc
, highpc
;
6118 struct partial_symtab
*pst
;
6120 gdb_assert (data
== NULL
);
6121 gdb_assert (per_cu
->is_debug_types
);
6122 sig_type
= (struct signatured_type
*) per_cu
;
6127 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
6128 tu_group
= get_type_unit_group (cu
, attr
);
6130 VEC_safe_push (sig_type_ptr
, tu_group
->tus
, sig_type
);
6132 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
6133 cu
->list_in_scope
= &file_symbols
;
6134 pst
= create_partial_symtab (per_cu
, "");
6137 first_die
= load_partial_dies (reader
, info_ptr
, 1);
6139 lowpc
= (CORE_ADDR
) -1;
6140 highpc
= (CORE_ADDR
) 0;
6141 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
6143 end_psymtab_common (objfile
, pst
);
6146 /* Struct used to sort TUs by their abbreviation table offset. */
6148 struct tu_abbrev_offset
6150 struct signatured_type
*sig_type
;
6151 sect_offset abbrev_offset
;
6154 /* Helper routine for build_type_psymtabs_1, passed to qsort. */
6157 sort_tu_by_abbrev_offset (const void *ap
, const void *bp
)
6159 const struct tu_abbrev_offset
* const *a
6160 = (const struct tu_abbrev_offset
* const*) ap
;
6161 const struct tu_abbrev_offset
* const *b
6162 = (const struct tu_abbrev_offset
* const*) bp
;
6163 unsigned int aoff
= (*a
)->abbrev_offset
.sect_off
;
6164 unsigned int boff
= (*b
)->abbrev_offset
.sect_off
;
6166 return (aoff
> boff
) - (aoff
< boff
);
6169 /* Efficiently read all the type units.
6170 This does the bulk of the work for build_type_psymtabs.
6172 The efficiency is because we sort TUs by the abbrev table they use and
6173 only read each abbrev table once. In one program there are 200K TUs
6174 sharing 8K abbrev tables.
6176 The main purpose of this function is to support building the
6177 dwarf2_per_objfile->type_unit_groups table.
6178 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
6179 can collapse the search space by grouping them by stmt_list.
6180 The savings can be significant, in the same program from above the 200K TUs
6181 share 8K stmt_list tables.
6183 FUNC is expected to call get_type_unit_group, which will create the
6184 struct type_unit_group if necessary and add it to
6185 dwarf2_per_objfile->type_unit_groups. */
6188 build_type_psymtabs_1 (void)
6190 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6191 struct cleanup
*cleanups
;
6192 struct abbrev_table
*abbrev_table
;
6193 sect_offset abbrev_offset
;
6194 struct tu_abbrev_offset
*sorted_by_abbrev
;
6197 /* It's up to the caller to not call us multiple times. */
6198 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
6200 if (dwarf2_per_objfile
->n_type_units
== 0)
6203 /* TUs typically share abbrev tables, and there can be way more TUs than
6204 abbrev tables. Sort by abbrev table to reduce the number of times we
6205 read each abbrev table in.
6206 Alternatives are to punt or to maintain a cache of abbrev tables.
6207 This is simpler and efficient enough for now.
6209 Later we group TUs by their DW_AT_stmt_list value (as this defines the
6210 symtab to use). Typically TUs with the same abbrev offset have the same
6211 stmt_list value too so in practice this should work well.
6213 The basic algorithm here is:
6215 sort TUs by abbrev table
6216 for each TU with same abbrev table:
6217 read abbrev table if first user
6218 read TU top level DIE
6219 [IWBN if DWO skeletons had DW_AT_stmt_list]
6222 if (dwarf_read_debug
)
6223 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
6225 /* Sort in a separate table to maintain the order of all_type_units
6226 for .gdb_index: TU indices directly index all_type_units. */
6227 sorted_by_abbrev
= XNEWVEC (struct tu_abbrev_offset
,
6228 dwarf2_per_objfile
->n_type_units
);
6229 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6231 struct signatured_type
*sig_type
= dwarf2_per_objfile
->all_type_units
[i
];
6233 sorted_by_abbrev
[i
].sig_type
= sig_type
;
6234 sorted_by_abbrev
[i
].abbrev_offset
=
6235 read_abbrev_offset (sig_type
->per_cu
.section
,
6236 sig_type
->per_cu
.offset
);
6238 cleanups
= make_cleanup (xfree
, sorted_by_abbrev
);
6239 qsort (sorted_by_abbrev
, dwarf2_per_objfile
->n_type_units
,
6240 sizeof (struct tu_abbrev_offset
), sort_tu_by_abbrev_offset
);
6242 abbrev_offset
.sect_off
= ~(unsigned) 0;
6243 abbrev_table
= NULL
;
6244 make_cleanup (abbrev_table_free_cleanup
, &abbrev_table
);
6246 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6248 const struct tu_abbrev_offset
*tu
= &sorted_by_abbrev
[i
];
6250 /* Switch to the next abbrev table if necessary. */
6251 if (abbrev_table
== NULL
6252 || tu
->abbrev_offset
.sect_off
!= abbrev_offset
.sect_off
)
6254 if (abbrev_table
!= NULL
)
6256 abbrev_table_free (abbrev_table
);
6257 /* Reset to NULL in case abbrev_table_read_table throws
6258 an error: abbrev_table_free_cleanup will get called. */
6259 abbrev_table
= NULL
;
6261 abbrev_offset
= tu
->abbrev_offset
;
6263 abbrev_table_read_table (&dwarf2_per_objfile
->abbrev
,
6265 ++tu_stats
->nr_uniq_abbrev_tables
;
6268 init_cutu_and_read_dies (&tu
->sig_type
->per_cu
, abbrev_table
, 0, 0,
6269 build_type_psymtabs_reader
, NULL
);
6272 do_cleanups (cleanups
);
6275 /* Print collected type unit statistics. */
6278 print_tu_stats (void)
6280 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6282 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
6283 fprintf_unfiltered (gdb_stdlog
, " %d TUs\n",
6284 dwarf2_per_objfile
->n_type_units
);
6285 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
6286 tu_stats
->nr_uniq_abbrev_tables
);
6287 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
6288 tu_stats
->nr_symtabs
);
6289 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
6290 tu_stats
->nr_symtab_sharers
);
6291 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
6292 tu_stats
->nr_stmt_less_type_units
);
6293 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
6294 tu_stats
->nr_all_type_units_reallocs
);
6297 /* Traversal function for build_type_psymtabs. */
6300 build_type_psymtab_dependencies (void **slot
, void *info
)
6302 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6303 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
6304 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
6305 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6306 int len
= VEC_length (sig_type_ptr
, tu_group
->tus
);
6307 struct signatured_type
*iter
;
6310 gdb_assert (len
> 0);
6311 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
6313 pst
->number_of_dependencies
= len
;
6315 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
6317 VEC_iterate (sig_type_ptr
, tu_group
->tus
, i
, iter
);
6320 gdb_assert (iter
->per_cu
.is_debug_types
);
6321 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
6322 iter
->type_unit_group
= tu_group
;
6325 VEC_free (sig_type_ptr
, tu_group
->tus
);
6330 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6331 Build partial symbol tables for the .debug_types comp-units. */
6334 build_type_psymtabs (struct objfile
*objfile
)
6336 if (! create_all_type_units (objfile
))
6339 build_type_psymtabs_1 ();
6342 /* Traversal function for process_skeletonless_type_unit.
6343 Read a TU in a DWO file and build partial symbols for it. */
6346 process_skeletonless_type_unit (void **slot
, void *info
)
6348 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
6349 struct objfile
*objfile
= (struct objfile
*) info
;
6350 struct signatured_type find_entry
, *entry
;
6352 /* If this TU doesn't exist in the global table, add it and read it in. */
6354 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6356 dwarf2_per_objfile
->signatured_types
6357 = allocate_signatured_type_table (objfile
);
6360 find_entry
.signature
= dwo_unit
->signature
;
6361 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
, &find_entry
,
6363 /* If we've already seen this type there's nothing to do. What's happening
6364 is we're doing our own version of comdat-folding here. */
6368 /* This does the job that create_all_type_units would have done for
6370 entry
= add_type_unit (dwo_unit
->signature
, slot
);
6371 fill_in_sig_entry_from_dwo_entry (objfile
, entry
, dwo_unit
);
6374 /* This does the job that build_type_psymtabs_1 would have done. */
6375 init_cutu_and_read_dies (&entry
->per_cu
, NULL
, 0, 0,
6376 build_type_psymtabs_reader
, NULL
);
6381 /* Traversal function for process_skeletonless_type_units. */
6384 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
6386 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
6388 if (dwo_file
->tus
!= NULL
)
6390 htab_traverse_noresize (dwo_file
->tus
,
6391 process_skeletonless_type_unit
, info
);
6397 /* Scan all TUs of DWO files, verifying we've processed them.
6398 This is needed in case a TU was emitted without its skeleton.
6399 Note: This can't be done until we know what all the DWO files are. */
6402 process_skeletonless_type_units (struct objfile
*objfile
)
6404 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
6405 if (get_dwp_file () == NULL
6406 && dwarf2_per_objfile
->dwo_files
!= NULL
)
6408 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
,
6409 process_dwo_file_for_skeletonless_type_units
,
6414 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
6417 psymtabs_addrmap_cleanup (void *o
)
6419 struct objfile
*objfile
= (struct objfile
*) o
;
6421 objfile
->psymtabs_addrmap
= NULL
;
6424 /* Compute the 'user' field for each psymtab in OBJFILE. */
6427 set_partial_user (struct objfile
*objfile
)
6431 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6433 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6434 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6440 for (j
= 0; j
< pst
->number_of_dependencies
; ++j
)
6442 /* Set the 'user' field only if it is not already set. */
6443 if (pst
->dependencies
[j
]->user
== NULL
)
6444 pst
->dependencies
[j
]->user
= pst
;
6449 /* Build the partial symbol table by doing a quick pass through the
6450 .debug_info and .debug_abbrev sections. */
6453 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
6455 struct cleanup
*back_to
, *addrmap_cleanup
;
6456 struct obstack temp_obstack
;
6459 if (dwarf_read_debug
)
6461 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
6462 objfile_name (objfile
));
6465 dwarf2_per_objfile
->reading_partial_symbols
= 1;
6467 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
6469 /* Any cached compilation units will be linked by the per-objfile
6470 read_in_chain. Make sure to free them when we're done. */
6471 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
6473 build_type_psymtabs (objfile
);
6475 create_all_comp_units (objfile
);
6477 /* Create a temporary address map on a temporary obstack. We later
6478 copy this to the final obstack. */
6479 obstack_init (&temp_obstack
);
6480 make_cleanup_obstack_free (&temp_obstack
);
6481 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
6482 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
6484 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6486 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6488 process_psymtab_comp_unit (per_cu
, 0, language_minimal
);
6491 /* This has to wait until we read the CUs, we need the list of DWOs. */
6492 process_skeletonless_type_units (objfile
);
6494 /* Now that all TUs have been processed we can fill in the dependencies. */
6495 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
6497 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
6498 build_type_psymtab_dependencies
, NULL
);
6501 if (dwarf_read_debug
)
6504 set_partial_user (objfile
);
6506 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
6507 &objfile
->objfile_obstack
);
6508 discard_cleanups (addrmap_cleanup
);
6510 do_cleanups (back_to
);
6512 if (dwarf_read_debug
)
6513 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
6514 objfile_name (objfile
));
6517 /* die_reader_func for load_partial_comp_unit. */
6520 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
6521 const gdb_byte
*info_ptr
,
6522 struct die_info
*comp_unit_die
,
6526 struct dwarf2_cu
*cu
= reader
->cu
;
6528 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
6530 /* Check if comp unit has_children.
6531 If so, read the rest of the partial symbols from this comp unit.
6532 If not, there's no more debug_info for this comp unit. */
6534 load_partial_dies (reader
, info_ptr
, 0);
6537 /* Load the partial DIEs for a secondary CU into memory.
6538 This is also used when rereading a primary CU with load_all_dies. */
6541 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
6543 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
6544 load_partial_comp_unit_reader
, NULL
);
6548 read_comp_units_from_section (struct objfile
*objfile
,
6549 struct dwarf2_section_info
*section
,
6550 unsigned int is_dwz
,
6553 struct dwarf2_per_cu_data
***all_comp_units
)
6555 const gdb_byte
*info_ptr
;
6556 bfd
*abfd
= get_section_bfd_owner (section
);
6558 if (dwarf_read_debug
)
6559 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
6560 get_section_name (section
),
6561 get_section_file_name (section
));
6563 dwarf2_read_section (objfile
, section
);
6565 info_ptr
= section
->buffer
;
6567 while (info_ptr
< section
->buffer
+ section
->size
)
6569 unsigned int length
, initial_length_size
;
6570 struct dwarf2_per_cu_data
*this_cu
;
6573 offset
.sect_off
= info_ptr
- section
->buffer
;
6575 /* Read just enough information to find out where the next
6576 compilation unit is. */
6577 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6579 /* Save the compilation unit for later lookup. */
6580 this_cu
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_per_cu_data
);
6581 memset (this_cu
, 0, sizeof (*this_cu
));
6582 this_cu
->offset
= offset
;
6583 this_cu
->length
= length
+ initial_length_size
;
6584 this_cu
->is_dwz
= is_dwz
;
6585 this_cu
->objfile
= objfile
;
6586 this_cu
->section
= section
;
6588 if (*n_comp_units
== *n_allocated
)
6591 *all_comp_units
= XRESIZEVEC (struct dwarf2_per_cu_data
*,
6592 *all_comp_units
, *n_allocated
);
6594 (*all_comp_units
)[*n_comp_units
] = this_cu
;
6597 info_ptr
= info_ptr
+ this_cu
->length
;
6601 /* Create a list of all compilation units in OBJFILE.
6602 This is only done for -readnow and building partial symtabs. */
6605 create_all_comp_units (struct objfile
*objfile
)
6609 struct dwarf2_per_cu_data
**all_comp_units
;
6610 struct dwz_file
*dwz
;
6614 all_comp_units
= XNEWVEC (struct dwarf2_per_cu_data
*, n_allocated
);
6616 read_comp_units_from_section (objfile
, &dwarf2_per_objfile
->info
, 0,
6617 &n_allocated
, &n_comp_units
, &all_comp_units
);
6619 dwz
= dwarf2_get_dwz_file ();
6621 read_comp_units_from_section (objfile
, &dwz
->info
, 1,
6622 &n_allocated
, &n_comp_units
,
6625 dwarf2_per_objfile
->all_comp_units
= XOBNEWVEC (&objfile
->objfile_obstack
,
6626 struct dwarf2_per_cu_data
*,
6628 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
6629 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
6630 xfree (all_comp_units
);
6631 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
6634 /* Process all loaded DIEs for compilation unit CU, starting at
6635 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
6636 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
6637 DW_AT_ranges). See the comments of add_partial_subprogram on how
6638 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
6641 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
6642 CORE_ADDR
*highpc
, int set_addrmap
,
6643 struct dwarf2_cu
*cu
)
6645 struct partial_die_info
*pdi
;
6647 /* Now, march along the PDI's, descending into ones which have
6648 interesting children but skipping the children of the other ones,
6649 until we reach the end of the compilation unit. */
6655 fixup_partial_die (pdi
, cu
);
6657 /* Anonymous namespaces or modules have no name but have interesting
6658 children, so we need to look at them. Ditto for anonymous
6661 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
6662 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
6663 || pdi
->tag
== DW_TAG_imported_unit
)
6667 case DW_TAG_subprogram
:
6668 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6670 case DW_TAG_constant
:
6671 case DW_TAG_variable
:
6672 case DW_TAG_typedef
:
6673 case DW_TAG_union_type
:
6674 if (!pdi
->is_declaration
)
6676 add_partial_symbol (pdi
, cu
);
6679 case DW_TAG_class_type
:
6680 case DW_TAG_interface_type
:
6681 case DW_TAG_structure_type
:
6682 if (!pdi
->is_declaration
)
6684 add_partial_symbol (pdi
, cu
);
6686 if (cu
->language
== language_rust
&& pdi
->has_children
)
6687 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
6690 case DW_TAG_enumeration_type
:
6691 if (!pdi
->is_declaration
)
6692 add_partial_enumeration (pdi
, cu
);
6694 case DW_TAG_base_type
:
6695 case DW_TAG_subrange_type
:
6696 /* File scope base type definitions are added to the partial
6698 add_partial_symbol (pdi
, cu
);
6700 case DW_TAG_namespace
:
6701 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6704 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6706 case DW_TAG_imported_unit
:
6708 struct dwarf2_per_cu_data
*per_cu
;
6710 /* For now we don't handle imported units in type units. */
6711 if (cu
->per_cu
->is_debug_types
)
6713 error (_("Dwarf Error: DW_TAG_imported_unit is not"
6714 " supported in type units [in module %s]"),
6715 objfile_name (cu
->objfile
));
6718 per_cu
= dwarf2_find_containing_comp_unit (pdi
->d
.offset
,
6722 /* Go read the partial unit, if needed. */
6723 if (per_cu
->v
.psymtab
== NULL
)
6724 process_psymtab_comp_unit (per_cu
, 1, cu
->language
);
6726 VEC_safe_push (dwarf2_per_cu_ptr
,
6727 cu
->per_cu
->imported_symtabs
, per_cu
);
6730 case DW_TAG_imported_declaration
:
6731 add_partial_symbol (pdi
, cu
);
6738 /* If the die has a sibling, skip to the sibling. */
6740 pdi
= pdi
->die_sibling
;
6744 /* Functions used to compute the fully scoped name of a partial DIE.
6746 Normally, this is simple. For C++, the parent DIE's fully scoped
6747 name is concatenated with "::" and the partial DIE's name.
6748 Enumerators are an exception; they use the scope of their parent
6749 enumeration type, i.e. the name of the enumeration type is not
6750 prepended to the enumerator.
6752 There are two complexities. One is DW_AT_specification; in this
6753 case "parent" means the parent of the target of the specification,
6754 instead of the direct parent of the DIE. The other is compilers
6755 which do not emit DW_TAG_namespace; in this case we try to guess
6756 the fully qualified name of structure types from their members'
6757 linkage names. This must be done using the DIE's children rather
6758 than the children of any DW_AT_specification target. We only need
6759 to do this for structures at the top level, i.e. if the target of
6760 any DW_AT_specification (if any; otherwise the DIE itself) does not
6763 /* Compute the scope prefix associated with PDI's parent, in
6764 compilation unit CU. The result will be allocated on CU's
6765 comp_unit_obstack, or a copy of the already allocated PDI->NAME
6766 field. NULL is returned if no prefix is necessary. */
6768 partial_die_parent_scope (struct partial_die_info
*pdi
,
6769 struct dwarf2_cu
*cu
)
6771 const char *grandparent_scope
;
6772 struct partial_die_info
*parent
, *real_pdi
;
6774 /* We need to look at our parent DIE; if we have a DW_AT_specification,
6775 then this means the parent of the specification DIE. */
6778 while (real_pdi
->has_specification
)
6779 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
6780 real_pdi
->spec_is_dwz
, cu
);
6782 parent
= real_pdi
->die_parent
;
6786 if (parent
->scope_set
)
6787 return parent
->scope
;
6789 fixup_partial_die (parent
, cu
);
6791 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
6793 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
6794 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
6795 Work around this problem here. */
6796 if (cu
->language
== language_cplus
6797 && parent
->tag
== DW_TAG_namespace
6798 && strcmp (parent
->name
, "::") == 0
6799 && grandparent_scope
== NULL
)
6801 parent
->scope
= NULL
;
6802 parent
->scope_set
= 1;
6806 if (pdi
->tag
== DW_TAG_enumerator
)
6807 /* Enumerators should not get the name of the enumeration as a prefix. */
6808 parent
->scope
= grandparent_scope
;
6809 else if (parent
->tag
== DW_TAG_namespace
6810 || parent
->tag
== DW_TAG_module
6811 || parent
->tag
== DW_TAG_structure_type
6812 || parent
->tag
== DW_TAG_class_type
6813 || parent
->tag
== DW_TAG_interface_type
6814 || parent
->tag
== DW_TAG_union_type
6815 || parent
->tag
== DW_TAG_enumeration_type
)
6817 if (grandparent_scope
== NULL
)
6818 parent
->scope
= parent
->name
;
6820 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
6822 parent
->name
, 0, cu
);
6826 /* FIXME drow/2004-04-01: What should we be doing with
6827 function-local names? For partial symbols, we should probably be
6829 complaint (&symfile_complaints
,
6830 _("unhandled containing DIE tag %d for DIE at %d"),
6831 parent
->tag
, pdi
->offset
.sect_off
);
6832 parent
->scope
= grandparent_scope
;
6835 parent
->scope_set
= 1;
6836 return parent
->scope
;
6839 /* Return the fully scoped name associated with PDI, from compilation unit
6840 CU. The result will be allocated with malloc. */
6843 partial_die_full_name (struct partial_die_info
*pdi
,
6844 struct dwarf2_cu
*cu
)
6846 const char *parent_scope
;
6848 /* If this is a template instantiation, we can not work out the
6849 template arguments from partial DIEs. So, unfortunately, we have
6850 to go through the full DIEs. At least any work we do building
6851 types here will be reused if full symbols are loaded later. */
6852 if (pdi
->has_template_arguments
)
6854 fixup_partial_die (pdi
, cu
);
6856 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
6858 struct die_info
*die
;
6859 struct attribute attr
;
6860 struct dwarf2_cu
*ref_cu
= cu
;
6862 /* DW_FORM_ref_addr is using section offset. */
6863 attr
.name
= (enum dwarf_attribute
) 0;
6864 attr
.form
= DW_FORM_ref_addr
;
6865 attr
.u
.unsnd
= pdi
->offset
.sect_off
;
6866 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
6868 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
6872 parent_scope
= partial_die_parent_scope (pdi
, cu
);
6873 if (parent_scope
== NULL
)
6876 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
6880 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
6882 struct objfile
*objfile
= cu
->objfile
;
6883 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6885 const char *actual_name
= NULL
;
6887 char *built_actual_name
;
6889 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6891 built_actual_name
= partial_die_full_name (pdi
, cu
);
6892 if (built_actual_name
!= NULL
)
6893 actual_name
= built_actual_name
;
6895 if (actual_name
== NULL
)
6896 actual_name
= pdi
->name
;
6900 case DW_TAG_subprogram
:
6901 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
);
6902 if (pdi
->is_external
|| cu
->language
== language_ada
)
6904 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
6905 of the global scope. But in Ada, we want to be able to access
6906 nested procedures globally. So all Ada subprograms are stored
6907 in the global scope. */
6908 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6909 built_actual_name
!= NULL
,
6910 VAR_DOMAIN
, LOC_BLOCK
,
6911 &objfile
->global_psymbols
,
6912 addr
, cu
->language
, objfile
);
6916 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6917 built_actual_name
!= NULL
,
6918 VAR_DOMAIN
, LOC_BLOCK
,
6919 &objfile
->static_psymbols
,
6920 addr
, cu
->language
, objfile
);
6923 if (pdi
->main_subprogram
&& actual_name
!= NULL
)
6924 set_objfile_main_name (objfile
, actual_name
, cu
->language
);
6926 case DW_TAG_constant
:
6928 struct psymbol_allocation_list
*list
;
6930 if (pdi
->is_external
)
6931 list
= &objfile
->global_psymbols
;
6933 list
= &objfile
->static_psymbols
;
6934 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6935 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
6936 list
, 0, cu
->language
, objfile
);
6939 case DW_TAG_variable
:
6941 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
6945 && !dwarf2_per_objfile
->has_section_at_zero
)
6947 /* A global or static variable may also have been stripped
6948 out by the linker if unused, in which case its address
6949 will be nullified; do not add such variables into partial
6950 symbol table then. */
6952 else if (pdi
->is_external
)
6955 Don't enter into the minimal symbol tables as there is
6956 a minimal symbol table entry from the ELF symbols already.
6957 Enter into partial symbol table if it has a location
6958 descriptor or a type.
6959 If the location descriptor is missing, new_symbol will create
6960 a LOC_UNRESOLVED symbol, the address of the variable will then
6961 be determined from the minimal symbol table whenever the variable
6963 The address for the partial symbol table entry is not
6964 used by GDB, but it comes in handy for debugging partial symbol
6967 if (pdi
->d
.locdesc
|| pdi
->has_type
)
6968 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6969 built_actual_name
!= NULL
,
6970 VAR_DOMAIN
, LOC_STATIC
,
6971 &objfile
->global_psymbols
,
6973 cu
->language
, objfile
);
6977 int has_loc
= pdi
->d
.locdesc
!= NULL
;
6979 /* Static Variable. Skip symbols whose value we cannot know (those
6980 without location descriptors or constant values). */
6981 if (!has_loc
&& !pdi
->has_const_value
)
6983 xfree (built_actual_name
);
6987 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6988 built_actual_name
!= NULL
,
6989 VAR_DOMAIN
, LOC_STATIC
,
6990 &objfile
->static_psymbols
,
6991 has_loc
? addr
+ baseaddr
: (CORE_ADDR
) 0,
6992 cu
->language
, objfile
);
6995 case DW_TAG_typedef
:
6996 case DW_TAG_base_type
:
6997 case DW_TAG_subrange_type
:
6998 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6999 built_actual_name
!= NULL
,
7000 VAR_DOMAIN
, LOC_TYPEDEF
,
7001 &objfile
->static_psymbols
,
7002 0, cu
->language
, objfile
);
7004 case DW_TAG_imported_declaration
:
7005 case DW_TAG_namespace
:
7006 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7007 built_actual_name
!= NULL
,
7008 VAR_DOMAIN
, LOC_TYPEDEF
,
7009 &objfile
->global_psymbols
,
7010 0, cu
->language
, objfile
);
7013 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7014 built_actual_name
!= NULL
,
7015 MODULE_DOMAIN
, LOC_TYPEDEF
,
7016 &objfile
->global_psymbols
,
7017 0, cu
->language
, objfile
);
7019 case DW_TAG_class_type
:
7020 case DW_TAG_interface_type
:
7021 case DW_TAG_structure_type
:
7022 case DW_TAG_union_type
:
7023 case DW_TAG_enumeration_type
:
7024 /* Skip external references. The DWARF standard says in the section
7025 about "Structure, Union, and Class Type Entries": "An incomplete
7026 structure, union or class type is represented by a structure,
7027 union or class entry that does not have a byte size attribute
7028 and that has a DW_AT_declaration attribute." */
7029 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
7031 xfree (built_actual_name
);
7035 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
7036 static vs. global. */
7037 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7038 built_actual_name
!= NULL
,
7039 STRUCT_DOMAIN
, LOC_TYPEDEF
,
7040 cu
->language
== language_cplus
7041 ? &objfile
->global_psymbols
7042 : &objfile
->static_psymbols
,
7043 0, cu
->language
, objfile
);
7046 case DW_TAG_enumerator
:
7047 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7048 built_actual_name
!= NULL
,
7049 VAR_DOMAIN
, LOC_CONST
,
7050 cu
->language
== language_cplus
7051 ? &objfile
->global_psymbols
7052 : &objfile
->static_psymbols
,
7053 0, cu
->language
, objfile
);
7059 xfree (built_actual_name
);
7062 /* Read a partial die corresponding to a namespace; also, add a symbol
7063 corresponding to that namespace to the symbol table. NAMESPACE is
7064 the name of the enclosing namespace. */
7067 add_partial_namespace (struct partial_die_info
*pdi
,
7068 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7069 int set_addrmap
, struct dwarf2_cu
*cu
)
7071 /* Add a symbol for the namespace. */
7073 add_partial_symbol (pdi
, cu
);
7075 /* Now scan partial symbols in that namespace. */
7077 if (pdi
->has_children
)
7078 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7081 /* Read a partial die corresponding to a Fortran module. */
7084 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
7085 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
7087 /* Add a symbol for the namespace. */
7089 add_partial_symbol (pdi
, cu
);
7091 /* Now scan partial symbols in that module. */
7093 if (pdi
->has_children
)
7094 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7097 /* Read a partial die corresponding to a subprogram and create a partial
7098 symbol for that subprogram. When the CU language allows it, this
7099 routine also defines a partial symbol for each nested subprogram
7100 that this subprogram contains. If SET_ADDRMAP is true, record the
7101 covered ranges in the addrmap. Set *LOWPC and *HIGHPC to the lowest
7102 and highest PC values found in PDI.
7104 PDI may also be a lexical block, in which case we simply search
7105 recursively for subprograms defined inside that lexical block.
7106 Again, this is only performed when the CU language allows this
7107 type of definitions. */
7110 add_partial_subprogram (struct partial_die_info
*pdi
,
7111 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7112 int set_addrmap
, struct dwarf2_cu
*cu
)
7114 if (pdi
->tag
== DW_TAG_subprogram
)
7116 if (pdi
->has_pc_info
)
7118 if (pdi
->lowpc
< *lowpc
)
7119 *lowpc
= pdi
->lowpc
;
7120 if (pdi
->highpc
> *highpc
)
7121 *highpc
= pdi
->highpc
;
7124 struct objfile
*objfile
= cu
->objfile
;
7125 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7130 baseaddr
= ANOFFSET (objfile
->section_offsets
,
7131 SECT_OFF_TEXT (objfile
));
7132 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7133 pdi
->lowpc
+ baseaddr
);
7134 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7135 pdi
->highpc
+ baseaddr
);
7136 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
7137 cu
->per_cu
->v
.psymtab
);
7141 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
7143 if (!pdi
->is_declaration
)
7144 /* Ignore subprogram DIEs that do not have a name, they are
7145 illegal. Do not emit a complaint at this point, we will
7146 do so when we convert this psymtab into a symtab. */
7148 add_partial_symbol (pdi
, cu
);
7152 if (! pdi
->has_children
)
7155 if (cu
->language
== language_ada
)
7157 pdi
= pdi
->die_child
;
7160 fixup_partial_die (pdi
, cu
);
7161 if (pdi
->tag
== DW_TAG_subprogram
7162 || pdi
->tag
== DW_TAG_lexical_block
)
7163 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
7164 pdi
= pdi
->die_sibling
;
7169 /* Read a partial die corresponding to an enumeration type. */
7172 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
7173 struct dwarf2_cu
*cu
)
7175 struct partial_die_info
*pdi
;
7177 if (enum_pdi
->name
!= NULL
)
7178 add_partial_symbol (enum_pdi
, cu
);
7180 pdi
= enum_pdi
->die_child
;
7183 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
7184 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
7186 add_partial_symbol (pdi
, cu
);
7187 pdi
= pdi
->die_sibling
;
7191 /* Return the initial uleb128 in the die at INFO_PTR. */
7194 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
7196 unsigned int bytes_read
;
7198 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7201 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
7202 Return the corresponding abbrev, or NULL if the number is zero (indicating
7203 an empty DIE). In either case *BYTES_READ will be set to the length of
7204 the initial number. */
7206 static struct abbrev_info
*
7207 peek_die_abbrev (const gdb_byte
*info_ptr
, unsigned int *bytes_read
,
7208 struct dwarf2_cu
*cu
)
7210 bfd
*abfd
= cu
->objfile
->obfd
;
7211 unsigned int abbrev_number
;
7212 struct abbrev_info
*abbrev
;
7214 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
7216 if (abbrev_number
== 0)
7219 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
7222 error (_("Dwarf Error: Could not find abbrev number %d in %s"
7223 " at offset 0x%x [in module %s]"),
7224 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
7225 cu
->header
.offset
.sect_off
, bfd_get_filename (abfd
));
7231 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7232 Returns a pointer to the end of a series of DIEs, terminated by an empty
7233 DIE. Any children of the skipped DIEs will also be skipped. */
7235 static const gdb_byte
*
7236 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
7238 struct dwarf2_cu
*cu
= reader
->cu
;
7239 struct abbrev_info
*abbrev
;
7240 unsigned int bytes_read
;
7244 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
7246 return info_ptr
+ bytes_read
;
7248 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
7252 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7253 INFO_PTR should point just after the initial uleb128 of a DIE, and the
7254 abbrev corresponding to that skipped uleb128 should be passed in
7255 ABBREV. Returns a pointer to this DIE's sibling, skipping any
7258 static const gdb_byte
*
7259 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
7260 struct abbrev_info
*abbrev
)
7262 unsigned int bytes_read
;
7263 struct attribute attr
;
7264 bfd
*abfd
= reader
->abfd
;
7265 struct dwarf2_cu
*cu
= reader
->cu
;
7266 const gdb_byte
*buffer
= reader
->buffer
;
7267 const gdb_byte
*buffer_end
= reader
->buffer_end
;
7268 unsigned int form
, i
;
7270 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
7272 /* The only abbrev we care about is DW_AT_sibling. */
7273 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
7275 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
7276 if (attr
.form
== DW_FORM_ref_addr
)
7277 complaint (&symfile_complaints
,
7278 _("ignoring absolute DW_AT_sibling"));
7281 unsigned int off
= dwarf2_get_ref_die_offset (&attr
).sect_off
;
7282 const gdb_byte
*sibling_ptr
= buffer
+ off
;
7284 if (sibling_ptr
< info_ptr
)
7285 complaint (&symfile_complaints
,
7286 _("DW_AT_sibling points backwards"));
7287 else if (sibling_ptr
> reader
->buffer_end
)
7288 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
7294 /* If it isn't DW_AT_sibling, skip this attribute. */
7295 form
= abbrev
->attrs
[i
].form
;
7299 case DW_FORM_ref_addr
:
7300 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
7301 and later it is offset sized. */
7302 if (cu
->header
.version
== 2)
7303 info_ptr
+= cu
->header
.addr_size
;
7305 info_ptr
+= cu
->header
.offset_size
;
7307 case DW_FORM_GNU_ref_alt
:
7308 info_ptr
+= cu
->header
.offset_size
;
7311 info_ptr
+= cu
->header
.addr_size
;
7318 case DW_FORM_flag_present
:
7330 case DW_FORM_ref_sig8
:
7333 case DW_FORM_string
:
7334 read_direct_string (abfd
, info_ptr
, &bytes_read
);
7335 info_ptr
+= bytes_read
;
7337 case DW_FORM_sec_offset
:
7339 case DW_FORM_GNU_strp_alt
:
7340 info_ptr
+= cu
->header
.offset_size
;
7342 case DW_FORM_exprloc
:
7344 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7345 info_ptr
+= bytes_read
;
7347 case DW_FORM_block1
:
7348 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
7350 case DW_FORM_block2
:
7351 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
7353 case DW_FORM_block4
:
7354 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
7358 case DW_FORM_ref_udata
:
7359 case DW_FORM_GNU_addr_index
:
7360 case DW_FORM_GNU_str_index
:
7361 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
7363 case DW_FORM_indirect
:
7364 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7365 info_ptr
+= bytes_read
;
7366 /* We need to continue parsing from here, so just go back to
7368 goto skip_attribute
;
7371 error (_("Dwarf Error: Cannot handle %s "
7372 "in DWARF reader [in module %s]"),
7373 dwarf_form_name (form
),
7374 bfd_get_filename (abfd
));
7378 if (abbrev
->has_children
)
7379 return skip_children (reader
, info_ptr
);
7384 /* Locate ORIG_PDI's sibling.
7385 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
7387 static const gdb_byte
*
7388 locate_pdi_sibling (const struct die_reader_specs
*reader
,
7389 struct partial_die_info
*orig_pdi
,
7390 const gdb_byte
*info_ptr
)
7392 /* Do we know the sibling already? */
7394 if (orig_pdi
->sibling
)
7395 return orig_pdi
->sibling
;
7397 /* Are there any children to deal with? */
7399 if (!orig_pdi
->has_children
)
7402 /* Skip the children the long way. */
7404 return skip_children (reader
, info_ptr
);
7407 /* Expand this partial symbol table into a full symbol table. SELF is
7411 dwarf2_read_symtab (struct partial_symtab
*self
,
7412 struct objfile
*objfile
)
7416 warning (_("bug: psymtab for %s is already read in."),
7423 printf_filtered (_("Reading in symbols for %s..."),
7425 gdb_flush (gdb_stdout
);
7428 /* Restore our global data. */
7430 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
7431 dwarf2_objfile_data_key
);
7433 /* If this psymtab is constructed from a debug-only objfile, the
7434 has_section_at_zero flag will not necessarily be correct. We
7435 can get the correct value for this flag by looking at the data
7436 associated with the (presumably stripped) associated objfile. */
7437 if (objfile
->separate_debug_objfile_backlink
)
7439 struct dwarf2_per_objfile
*dpo_backlink
7440 = ((struct dwarf2_per_objfile
*)
7441 objfile_data (objfile
->separate_debug_objfile_backlink
,
7442 dwarf2_objfile_data_key
));
7444 dwarf2_per_objfile
->has_section_at_zero
7445 = dpo_backlink
->has_section_at_zero
;
7448 dwarf2_per_objfile
->reading_partial_symbols
= 0;
7450 psymtab_to_symtab_1 (self
);
7452 /* Finish up the debug error message. */
7454 printf_filtered (_("done.\n"));
7457 process_cu_includes ();
7460 /* Reading in full CUs. */
7462 /* Add PER_CU to the queue. */
7465 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
7466 enum language pretend_language
)
7468 struct dwarf2_queue_item
*item
;
7471 item
= XNEW (struct dwarf2_queue_item
);
7472 item
->per_cu
= per_cu
;
7473 item
->pretend_language
= pretend_language
;
7476 if (dwarf2_queue
== NULL
)
7477 dwarf2_queue
= item
;
7479 dwarf2_queue_tail
->next
= item
;
7481 dwarf2_queue_tail
= item
;
7484 /* If PER_CU is not yet queued, add it to the queue.
7485 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
7487 The result is non-zero if PER_CU was queued, otherwise the result is zero
7488 meaning either PER_CU is already queued or it is already loaded.
7490 N.B. There is an invariant here that if a CU is queued then it is loaded.
7491 The caller is required to load PER_CU if we return non-zero. */
7494 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
7495 struct dwarf2_per_cu_data
*per_cu
,
7496 enum language pretend_language
)
7498 /* We may arrive here during partial symbol reading, if we need full
7499 DIEs to process an unusual case (e.g. template arguments). Do
7500 not queue PER_CU, just tell our caller to load its DIEs. */
7501 if (dwarf2_per_objfile
->reading_partial_symbols
)
7503 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
7508 /* Mark the dependence relation so that we don't flush PER_CU
7510 if (dependent_cu
!= NULL
)
7511 dwarf2_add_dependence (dependent_cu
, per_cu
);
7513 /* If it's already on the queue, we have nothing to do. */
7517 /* If the compilation unit is already loaded, just mark it as
7519 if (per_cu
->cu
!= NULL
)
7521 per_cu
->cu
->last_used
= 0;
7525 /* Add it to the queue. */
7526 queue_comp_unit (per_cu
, pretend_language
);
7531 /* Process the queue. */
7534 process_queue (void)
7536 struct dwarf2_queue_item
*item
, *next_item
;
7538 if (dwarf_read_debug
)
7540 fprintf_unfiltered (gdb_stdlog
,
7541 "Expanding one or more symtabs of objfile %s ...\n",
7542 objfile_name (dwarf2_per_objfile
->objfile
));
7545 /* The queue starts out with one item, but following a DIE reference
7546 may load a new CU, adding it to the end of the queue. */
7547 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
7549 if ((dwarf2_per_objfile
->using_index
7550 ? !item
->per_cu
->v
.quick
->compunit_symtab
7551 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
7552 /* Skip dummy CUs. */
7553 && item
->per_cu
->cu
!= NULL
)
7555 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
7556 unsigned int debug_print_threshold
;
7559 if (per_cu
->is_debug_types
)
7561 struct signatured_type
*sig_type
=
7562 (struct signatured_type
*) per_cu
;
7564 sprintf (buf
, "TU %s at offset 0x%x",
7565 hex_string (sig_type
->signature
),
7566 per_cu
->offset
.sect_off
);
7567 /* There can be 100s of TUs.
7568 Only print them in verbose mode. */
7569 debug_print_threshold
= 2;
7573 sprintf (buf
, "CU at offset 0x%x", per_cu
->offset
.sect_off
);
7574 debug_print_threshold
= 1;
7577 if (dwarf_read_debug
>= debug_print_threshold
)
7578 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
7580 if (per_cu
->is_debug_types
)
7581 process_full_type_unit (per_cu
, item
->pretend_language
);
7583 process_full_comp_unit (per_cu
, item
->pretend_language
);
7585 if (dwarf_read_debug
>= debug_print_threshold
)
7586 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
7589 item
->per_cu
->queued
= 0;
7590 next_item
= item
->next
;
7594 dwarf2_queue_tail
= NULL
;
7596 if (dwarf_read_debug
)
7598 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
7599 objfile_name (dwarf2_per_objfile
->objfile
));
7603 /* Free all allocated queue entries. This function only releases anything if
7604 an error was thrown; if the queue was processed then it would have been
7605 freed as we went along. */
7608 dwarf2_release_queue (void *dummy
)
7610 struct dwarf2_queue_item
*item
, *last
;
7612 item
= dwarf2_queue
;
7615 /* Anything still marked queued is likely to be in an
7616 inconsistent state, so discard it. */
7617 if (item
->per_cu
->queued
)
7619 if (item
->per_cu
->cu
!= NULL
)
7620 free_one_cached_comp_unit (item
->per_cu
);
7621 item
->per_cu
->queued
= 0;
7629 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
7632 /* Read in full symbols for PST, and anything it depends on. */
7635 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
7637 struct dwarf2_per_cu_data
*per_cu
;
7643 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
7644 if (!pst
->dependencies
[i
]->readin
7645 && pst
->dependencies
[i
]->user
== NULL
)
7647 /* Inform about additional files that need to be read in. */
7650 /* FIXME: i18n: Need to make this a single string. */
7651 fputs_filtered (" ", gdb_stdout
);
7653 fputs_filtered ("and ", gdb_stdout
);
7655 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
7656 wrap_here (""); /* Flush output. */
7657 gdb_flush (gdb_stdout
);
7659 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
7662 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
7666 /* It's an include file, no symbols to read for it.
7667 Everything is in the parent symtab. */
7672 dw2_do_instantiate_symtab (per_cu
);
7675 /* Trivial hash function for die_info: the hash value of a DIE
7676 is its offset in .debug_info for this objfile. */
7679 die_hash (const void *item
)
7681 const struct die_info
*die
= (const struct die_info
*) item
;
7683 return die
->offset
.sect_off
;
7686 /* Trivial comparison function for die_info structures: two DIEs
7687 are equal if they have the same offset. */
7690 die_eq (const void *item_lhs
, const void *item_rhs
)
7692 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
7693 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
7695 return die_lhs
->offset
.sect_off
== die_rhs
->offset
.sect_off
;
7698 /* die_reader_func for load_full_comp_unit.
7699 This is identical to read_signatured_type_reader,
7700 but is kept separate for now. */
7703 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
7704 const gdb_byte
*info_ptr
,
7705 struct die_info
*comp_unit_die
,
7709 struct dwarf2_cu
*cu
= reader
->cu
;
7710 enum language
*language_ptr
= (enum language
*) data
;
7712 gdb_assert (cu
->die_hash
== NULL
);
7714 htab_create_alloc_ex (cu
->header
.length
/ 12,
7718 &cu
->comp_unit_obstack
,
7719 hashtab_obstack_allocate
,
7720 dummy_obstack_deallocate
);
7723 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
7724 &info_ptr
, comp_unit_die
);
7725 cu
->dies
= comp_unit_die
;
7726 /* comp_unit_die is not stored in die_hash, no need. */
7728 /* We try not to read any attributes in this function, because not
7729 all CUs needed for references have been loaded yet, and symbol
7730 table processing isn't initialized. But we have to set the CU language,
7731 or we won't be able to build types correctly.
7732 Similarly, if we do not read the producer, we can not apply
7733 producer-specific interpretation. */
7734 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
7737 /* Load the DIEs associated with PER_CU into memory. */
7740 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
7741 enum language pretend_language
)
7743 gdb_assert (! this_cu
->is_debug_types
);
7745 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
7746 load_full_comp_unit_reader
, &pretend_language
);
7749 /* Add a DIE to the delayed physname list. */
7752 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
7753 const char *name
, struct die_info
*die
,
7754 struct dwarf2_cu
*cu
)
7756 struct delayed_method_info mi
;
7758 mi
.fnfield_index
= fnfield_index
;
7762 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
7765 /* A cleanup for freeing the delayed method list. */
7768 free_delayed_list (void *ptr
)
7770 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
7771 if (cu
->method_list
!= NULL
)
7773 VEC_free (delayed_method_info
, cu
->method_list
);
7774 cu
->method_list
= NULL
;
7778 /* Compute the physnames of any methods on the CU's method list.
7780 The computation of method physnames is delayed in order to avoid the
7781 (bad) condition that one of the method's formal parameters is of an as yet
7785 compute_delayed_physnames (struct dwarf2_cu
*cu
)
7788 struct delayed_method_info
*mi
;
7789 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
7791 const char *physname
;
7792 struct fn_fieldlist
*fn_flp
7793 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
7794 physname
= dwarf2_physname (mi
->name
, mi
->die
, cu
);
7795 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
->index
)
7796 = physname
? physname
: "";
7800 /* Go objects should be embedded in a DW_TAG_module DIE,
7801 and it's not clear if/how imported objects will appear.
7802 To keep Go support simple until that's worked out,
7803 go back through what we've read and create something usable.
7804 We could do this while processing each DIE, and feels kinda cleaner,
7805 but that way is more invasive.
7806 This is to, for example, allow the user to type "p var" or "b main"
7807 without having to specify the package name, and allow lookups
7808 of module.object to work in contexts that use the expression
7812 fixup_go_packaging (struct dwarf2_cu
*cu
)
7814 char *package_name
= NULL
;
7815 struct pending
*list
;
7818 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
7820 for (i
= 0; i
< list
->nsyms
; ++i
)
7822 struct symbol
*sym
= list
->symbol
[i
];
7824 if (SYMBOL_LANGUAGE (sym
) == language_go
7825 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
7827 char *this_package_name
= go_symbol_package_name (sym
);
7829 if (this_package_name
== NULL
)
7831 if (package_name
== NULL
)
7832 package_name
= this_package_name
;
7835 if (strcmp (package_name
, this_package_name
) != 0)
7836 complaint (&symfile_complaints
,
7837 _("Symtab %s has objects from two different Go packages: %s and %s"),
7838 (symbol_symtab (sym
) != NULL
7839 ? symtab_to_filename_for_display
7840 (symbol_symtab (sym
))
7841 : objfile_name (cu
->objfile
)),
7842 this_package_name
, package_name
);
7843 xfree (this_package_name
);
7849 if (package_name
!= NULL
)
7851 struct objfile
*objfile
= cu
->objfile
;
7852 const char *saved_package_name
7853 = (const char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
7855 strlen (package_name
));
7856 struct type
*type
= init_type (objfile
, TYPE_CODE_MODULE
, 0,
7857 saved_package_name
);
7860 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
7862 sym
= allocate_symbol (objfile
);
7863 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
7864 SYMBOL_SET_NAMES (sym
, saved_package_name
,
7865 strlen (saved_package_name
), 0, objfile
);
7866 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
7867 e.g., "main" finds the "main" module and not C's main(). */
7868 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
7869 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
7870 SYMBOL_TYPE (sym
) = type
;
7872 add_symbol_to_list (sym
, &global_symbols
);
7874 xfree (package_name
);
7878 /* Return the symtab for PER_CU. This works properly regardless of
7879 whether we're using the index or psymtabs. */
7881 static struct compunit_symtab
*
7882 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
7884 return (dwarf2_per_objfile
->using_index
7885 ? per_cu
->v
.quick
->compunit_symtab
7886 : per_cu
->v
.psymtab
->compunit_symtab
);
7889 /* A helper function for computing the list of all symbol tables
7890 included by PER_CU. */
7893 recursively_compute_inclusions (VEC (compunit_symtab_ptr
) **result
,
7894 htab_t all_children
, htab_t all_type_symtabs
,
7895 struct dwarf2_per_cu_data
*per_cu
,
7896 struct compunit_symtab
*immediate_parent
)
7900 struct compunit_symtab
*cust
;
7901 struct dwarf2_per_cu_data
*iter
;
7903 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
7906 /* This inclusion and its children have been processed. */
7911 /* Only add a CU if it has a symbol table. */
7912 cust
= get_compunit_symtab (per_cu
);
7915 /* If this is a type unit only add its symbol table if we haven't
7916 seen it yet (type unit per_cu's can share symtabs). */
7917 if (per_cu
->is_debug_types
)
7919 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
7923 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
7924 if (cust
->user
== NULL
)
7925 cust
->user
= immediate_parent
;
7930 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
7931 if (cust
->user
== NULL
)
7932 cust
->user
= immediate_parent
;
7937 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
7940 recursively_compute_inclusions (result
, all_children
,
7941 all_type_symtabs
, iter
, cust
);
7945 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
7949 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
7951 gdb_assert (! per_cu
->is_debug_types
);
7953 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
7956 struct dwarf2_per_cu_data
*per_cu_iter
;
7957 struct compunit_symtab
*compunit_symtab_iter
;
7958 VEC (compunit_symtab_ptr
) *result_symtabs
= NULL
;
7959 htab_t all_children
, all_type_symtabs
;
7960 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
7962 /* If we don't have a symtab, we can just skip this case. */
7966 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
7967 NULL
, xcalloc
, xfree
);
7968 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
7969 NULL
, xcalloc
, xfree
);
7972 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
7976 recursively_compute_inclusions (&result_symtabs
, all_children
,
7977 all_type_symtabs
, per_cu_iter
,
7981 /* Now we have a transitive closure of all the included symtabs. */
7982 len
= VEC_length (compunit_symtab_ptr
, result_symtabs
);
7984 = XOBNEWVEC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
7985 struct compunit_symtab
*, len
+ 1);
7987 VEC_iterate (compunit_symtab_ptr
, result_symtabs
, ix
,
7988 compunit_symtab_iter
);
7990 cust
->includes
[ix
] = compunit_symtab_iter
;
7991 cust
->includes
[len
] = NULL
;
7993 VEC_free (compunit_symtab_ptr
, result_symtabs
);
7994 htab_delete (all_children
);
7995 htab_delete (all_type_symtabs
);
7999 /* Compute the 'includes' field for the symtabs of all the CUs we just
8003 process_cu_includes (void)
8006 struct dwarf2_per_cu_data
*iter
;
8009 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
8013 if (! iter
->is_debug_types
)
8014 compute_compunit_symtab_includes (iter
);
8017 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
8020 /* Generate full symbol information for PER_CU, whose DIEs have
8021 already been loaded into memory. */
8024 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
8025 enum language pretend_language
)
8027 struct dwarf2_cu
*cu
= per_cu
->cu
;
8028 struct objfile
*objfile
= per_cu
->objfile
;
8029 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8030 CORE_ADDR lowpc
, highpc
;
8031 struct compunit_symtab
*cust
;
8032 struct cleanup
*back_to
, *delayed_list_cleanup
;
8034 struct block
*static_block
;
8037 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8040 back_to
= make_cleanup (really_free_pendings
, NULL
);
8041 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
8043 cu
->list_in_scope
= &file_symbols
;
8045 cu
->language
= pretend_language
;
8046 cu
->language_defn
= language_def (cu
->language
);
8048 /* Do line number decoding in read_file_scope () */
8049 process_die (cu
->dies
, cu
);
8051 /* For now fudge the Go package. */
8052 if (cu
->language
== language_go
)
8053 fixup_go_packaging (cu
);
8055 /* Now that we have processed all the DIEs in the CU, all the types
8056 should be complete, and it should now be safe to compute all of the
8058 compute_delayed_physnames (cu
);
8059 do_cleanups (delayed_list_cleanup
);
8061 /* Some compilers don't define a DW_AT_high_pc attribute for the
8062 compilation unit. If the DW_AT_high_pc is missing, synthesize
8063 it, by scanning the DIE's below the compilation unit. */
8064 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
8066 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
8067 static_block
= end_symtab_get_static_block (addr
, 0, 1);
8069 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
8070 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
8071 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
8072 addrmap to help ensure it has an accurate map of pc values belonging to
8074 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
8076 cust
= end_symtab_from_static_block (static_block
,
8077 SECT_OFF_TEXT (objfile
), 0);
8081 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
8083 /* Set symtab language to language from DW_AT_language. If the
8084 compilation is from a C file generated by language preprocessors, do
8085 not set the language if it was already deduced by start_subfile. */
8086 if (!(cu
->language
== language_c
8087 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
8088 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8090 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
8091 produce DW_AT_location with location lists but it can be possibly
8092 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
8093 there were bugs in prologue debug info, fixed later in GCC-4.5
8094 by "unwind info for epilogues" patch (which is not directly related).
8096 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
8097 needed, it would be wrong due to missing DW_AT_producer there.
8099 Still one can confuse GDB by using non-standard GCC compilation
8100 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
8102 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
8103 cust
->locations_valid
= 1;
8105 if (gcc_4_minor
>= 5)
8106 cust
->epilogue_unwind_valid
= 1;
8108 cust
->call_site_htab
= cu
->call_site_htab
;
8111 if (dwarf2_per_objfile
->using_index
)
8112 per_cu
->v
.quick
->compunit_symtab
= cust
;
8115 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8116 pst
->compunit_symtab
= cust
;
8120 /* Push it for inclusion processing later. */
8121 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
8123 do_cleanups (back_to
);
8126 /* Generate full symbol information for type unit PER_CU, whose DIEs have
8127 already been loaded into memory. */
8130 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
8131 enum language pretend_language
)
8133 struct dwarf2_cu
*cu
= per_cu
->cu
;
8134 struct objfile
*objfile
= per_cu
->objfile
;
8135 struct compunit_symtab
*cust
;
8136 struct cleanup
*back_to
, *delayed_list_cleanup
;
8137 struct signatured_type
*sig_type
;
8139 gdb_assert (per_cu
->is_debug_types
);
8140 sig_type
= (struct signatured_type
*) per_cu
;
8143 back_to
= make_cleanup (really_free_pendings
, NULL
);
8144 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
8146 cu
->list_in_scope
= &file_symbols
;
8148 cu
->language
= pretend_language
;
8149 cu
->language_defn
= language_def (cu
->language
);
8151 /* The symbol tables are set up in read_type_unit_scope. */
8152 process_die (cu
->dies
, cu
);
8154 /* For now fudge the Go package. */
8155 if (cu
->language
== language_go
)
8156 fixup_go_packaging (cu
);
8158 /* Now that we have processed all the DIEs in the CU, all the types
8159 should be complete, and it should now be safe to compute all of the
8161 compute_delayed_physnames (cu
);
8162 do_cleanups (delayed_list_cleanup
);
8164 /* TUs share symbol tables.
8165 If this is the first TU to use this symtab, complete the construction
8166 of it with end_expandable_symtab. Otherwise, complete the addition of
8167 this TU's symbols to the existing symtab. */
8168 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
8170 cust
= end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
8171 sig_type
->type_unit_group
->compunit_symtab
= cust
;
8175 /* Set symtab language to language from DW_AT_language. If the
8176 compilation is from a C file generated by language preprocessors,
8177 do not set the language if it was already deduced by
8179 if (!(cu
->language
== language_c
8180 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
8181 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8186 augment_type_symtab ();
8187 cust
= sig_type
->type_unit_group
->compunit_symtab
;
8190 if (dwarf2_per_objfile
->using_index
)
8191 per_cu
->v
.quick
->compunit_symtab
= cust
;
8194 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8195 pst
->compunit_symtab
= cust
;
8199 do_cleanups (back_to
);
8202 /* Process an imported unit DIE. */
8205 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8207 struct attribute
*attr
;
8209 /* For now we don't handle imported units in type units. */
8210 if (cu
->per_cu
->is_debug_types
)
8212 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8213 " supported in type units [in module %s]"),
8214 objfile_name (cu
->objfile
));
8217 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8220 struct dwarf2_per_cu_data
*per_cu
;
8224 offset
= dwarf2_get_ref_die_offset (attr
);
8225 is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
8226 per_cu
= dwarf2_find_containing_comp_unit (offset
, is_dwz
, cu
->objfile
);
8228 /* If necessary, add it to the queue and load its DIEs. */
8229 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
8230 load_full_comp_unit (per_cu
, cu
->language
);
8232 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
8237 /* Reset the in_process bit of a die. */
8240 reset_die_in_process (void *arg
)
8242 struct die_info
*die
= (struct die_info
*) arg
;
8244 die
->in_process
= 0;
8247 /* Process a die and its children. */
8250 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8252 struct cleanup
*in_process
;
8254 /* We should only be processing those not already in process. */
8255 gdb_assert (!die
->in_process
);
8257 die
->in_process
= 1;
8258 in_process
= make_cleanup (reset_die_in_process
,die
);
8262 case DW_TAG_padding
:
8264 case DW_TAG_compile_unit
:
8265 case DW_TAG_partial_unit
:
8266 read_file_scope (die
, cu
);
8268 case DW_TAG_type_unit
:
8269 read_type_unit_scope (die
, cu
);
8271 case DW_TAG_subprogram
:
8272 case DW_TAG_inlined_subroutine
:
8273 read_func_scope (die
, cu
);
8275 case DW_TAG_lexical_block
:
8276 case DW_TAG_try_block
:
8277 case DW_TAG_catch_block
:
8278 read_lexical_block_scope (die
, cu
);
8280 case DW_TAG_GNU_call_site
:
8281 read_call_site_scope (die
, cu
);
8283 case DW_TAG_class_type
:
8284 case DW_TAG_interface_type
:
8285 case DW_TAG_structure_type
:
8286 case DW_TAG_union_type
:
8287 process_structure_scope (die
, cu
);
8289 case DW_TAG_enumeration_type
:
8290 process_enumeration_scope (die
, cu
);
8293 /* These dies have a type, but processing them does not create
8294 a symbol or recurse to process the children. Therefore we can
8295 read them on-demand through read_type_die. */
8296 case DW_TAG_subroutine_type
:
8297 case DW_TAG_set_type
:
8298 case DW_TAG_array_type
:
8299 case DW_TAG_pointer_type
:
8300 case DW_TAG_ptr_to_member_type
:
8301 case DW_TAG_reference_type
:
8302 case DW_TAG_string_type
:
8305 case DW_TAG_base_type
:
8306 case DW_TAG_subrange_type
:
8307 case DW_TAG_typedef
:
8308 /* Add a typedef symbol for the type definition, if it has a
8310 new_symbol (die
, read_type_die (die
, cu
), cu
);
8312 case DW_TAG_common_block
:
8313 read_common_block (die
, cu
);
8315 case DW_TAG_common_inclusion
:
8317 case DW_TAG_namespace
:
8318 cu
->processing_has_namespace_info
= 1;
8319 read_namespace (die
, cu
);
8322 cu
->processing_has_namespace_info
= 1;
8323 read_module (die
, cu
);
8325 case DW_TAG_imported_declaration
:
8326 cu
->processing_has_namespace_info
= 1;
8327 if (read_namespace_alias (die
, cu
))
8329 /* The declaration is not a global namespace alias: fall through. */
8330 case DW_TAG_imported_module
:
8331 cu
->processing_has_namespace_info
= 1;
8332 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
8333 || cu
->language
!= language_fortran
))
8334 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
8335 dwarf_tag_name (die
->tag
));
8336 read_import_statement (die
, cu
);
8339 case DW_TAG_imported_unit
:
8340 process_imported_unit_die (die
, cu
);
8344 new_symbol (die
, NULL
, cu
);
8348 do_cleanups (in_process
);
8351 /* DWARF name computation. */
8353 /* A helper function for dwarf2_compute_name which determines whether DIE
8354 needs to have the name of the scope prepended to the name listed in the
8358 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
8360 struct attribute
*attr
;
8364 case DW_TAG_namespace
:
8365 case DW_TAG_typedef
:
8366 case DW_TAG_class_type
:
8367 case DW_TAG_interface_type
:
8368 case DW_TAG_structure_type
:
8369 case DW_TAG_union_type
:
8370 case DW_TAG_enumeration_type
:
8371 case DW_TAG_enumerator
:
8372 case DW_TAG_subprogram
:
8373 case DW_TAG_inlined_subroutine
:
8375 case DW_TAG_imported_declaration
:
8378 case DW_TAG_variable
:
8379 case DW_TAG_constant
:
8380 /* We only need to prefix "globally" visible variables. These include
8381 any variable marked with DW_AT_external or any variable that
8382 lives in a namespace. [Variables in anonymous namespaces
8383 require prefixing, but they are not DW_AT_external.] */
8385 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
8387 struct dwarf2_cu
*spec_cu
= cu
;
8389 return die_needs_namespace (die_specification (die
, &spec_cu
),
8393 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
8394 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
8395 && die
->parent
->tag
!= DW_TAG_module
)
8397 /* A variable in a lexical block of some kind does not need a
8398 namespace, even though in C++ such variables may be external
8399 and have a mangled name. */
8400 if (die
->parent
->tag
== DW_TAG_lexical_block
8401 || die
->parent
->tag
== DW_TAG_try_block
8402 || die
->parent
->tag
== DW_TAG_catch_block
8403 || die
->parent
->tag
== DW_TAG_subprogram
)
8412 /* Retrieve the last character from a mem_file. */
8415 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
8417 char *last_char_p
= (char *) object
;
8420 *last_char_p
= buffer
[length
- 1];
8423 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
8424 compute the physname for the object, which include a method's:
8425 - formal parameters (C++),
8426 - receiver type (Go),
8428 The term "physname" is a bit confusing.
8429 For C++, for example, it is the demangled name.
8430 For Go, for example, it's the mangled name.
8432 For Ada, return the DIE's linkage name rather than the fully qualified
8433 name. PHYSNAME is ignored..
8435 The result is allocated on the objfile_obstack and canonicalized. */
8438 dwarf2_compute_name (const char *name
,
8439 struct die_info
*die
, struct dwarf2_cu
*cu
,
8442 struct objfile
*objfile
= cu
->objfile
;
8445 name
= dwarf2_name (die
, cu
);
8447 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
8448 but otherwise compute it by typename_concat inside GDB.
8449 FIXME: Actually this is not really true, or at least not always true.
8450 It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle
8451 Fortran names because there is no mangling standard. So new_symbol_full
8452 will set the demangled name to the result of dwarf2_full_name, and it is
8453 the demangled name that GDB uses if it exists. */
8454 if (cu
->language
== language_ada
8455 || (cu
->language
== language_fortran
&& physname
))
8457 /* For Ada unit, we prefer the linkage name over the name, as
8458 the former contains the exported name, which the user expects
8459 to be able to reference. Ideally, we want the user to be able
8460 to reference this entity using either natural or linkage name,
8461 but we haven't started looking at this enhancement yet. */
8462 const char *linkage_name
;
8464 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
8465 if (linkage_name
== NULL
)
8466 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8467 if (linkage_name
!= NULL
)
8468 return linkage_name
;
8471 /* These are the only languages we know how to qualify names in. */
8473 && (cu
->language
== language_cplus
8474 || cu
->language
== language_fortran
|| cu
->language
== language_d
8475 || cu
->language
== language_rust
))
8477 if (die_needs_namespace (die
, cu
))
8481 struct ui_file
*buf
;
8482 const char *canonical_name
= NULL
;
8484 prefix
= determine_prefix (die
, cu
);
8485 buf
= mem_fileopen ();
8486 if (*prefix
!= '\0')
8488 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
8491 fputs_unfiltered (prefixed_name
, buf
);
8492 xfree (prefixed_name
);
8495 fputs_unfiltered (name
, buf
);
8497 /* Template parameters may be specified in the DIE's DW_AT_name, or
8498 as children with DW_TAG_template_type_param or
8499 DW_TAG_value_type_param. If the latter, add them to the name
8500 here. If the name already has template parameters, then
8501 skip this step; some versions of GCC emit both, and
8502 it is more efficient to use the pre-computed name.
8504 Something to keep in mind about this process: it is very
8505 unlikely, or in some cases downright impossible, to produce
8506 something that will match the mangled name of a function.
8507 If the definition of the function has the same debug info,
8508 we should be able to match up with it anyway. But fallbacks
8509 using the minimal symbol, for instance to find a method
8510 implemented in a stripped copy of libstdc++, will not work.
8511 If we do not have debug info for the definition, we will have to
8512 match them up some other way.
8514 When we do name matching there is a related problem with function
8515 templates; two instantiated function templates are allowed to
8516 differ only by their return types, which we do not add here. */
8518 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
8520 struct attribute
*attr
;
8521 struct die_info
*child
;
8524 die
->building_fullname
= 1;
8526 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
8530 const gdb_byte
*bytes
;
8531 struct dwarf2_locexpr_baton
*baton
;
8534 if (child
->tag
!= DW_TAG_template_type_param
8535 && child
->tag
!= DW_TAG_template_value_param
)
8540 fputs_unfiltered ("<", buf
);
8544 fputs_unfiltered (", ", buf
);
8546 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
8549 complaint (&symfile_complaints
,
8550 _("template parameter missing DW_AT_type"));
8551 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
8554 type
= die_type (child
, cu
);
8556 if (child
->tag
== DW_TAG_template_type_param
)
8558 c_print_type (type
, "", buf
, -1, 0, &type_print_raw_options
);
8562 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
8565 complaint (&symfile_complaints
,
8566 _("template parameter missing "
8567 "DW_AT_const_value"));
8568 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
8572 dwarf2_const_value_attr (attr
, type
, name
,
8573 &cu
->comp_unit_obstack
, cu
,
8574 &value
, &bytes
, &baton
);
8576 if (TYPE_NOSIGN (type
))
8577 /* GDB prints characters as NUMBER 'CHAR'. If that's
8578 changed, this can use value_print instead. */
8579 c_printchar (value
, type
, buf
);
8582 struct value_print_options opts
;
8585 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
8589 else if (bytes
!= NULL
)
8591 v
= allocate_value (type
);
8592 memcpy (value_contents_writeable (v
), bytes
,
8593 TYPE_LENGTH (type
));
8596 v
= value_from_longest (type
, value
);
8598 /* Specify decimal so that we do not depend on
8600 get_formatted_print_options (&opts
, 'd');
8602 value_print (v
, buf
, &opts
);
8608 die
->building_fullname
= 0;
8612 /* Close the argument list, with a space if necessary
8613 (nested templates). */
8614 char last_char
= '\0';
8615 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
8616 if (last_char
== '>')
8617 fputs_unfiltered (" >", buf
);
8619 fputs_unfiltered (">", buf
);
8623 /* For C++ methods, append formal parameter type
8624 information, if PHYSNAME. */
8626 if (physname
&& die
->tag
== DW_TAG_subprogram
8627 && cu
->language
== language_cplus
)
8629 struct type
*type
= read_type_die (die
, cu
);
8631 c_type_print_args (type
, buf
, 1, cu
->language
,
8632 &type_print_raw_options
);
8634 if (cu
->language
== language_cplus
)
8636 /* Assume that an artificial first parameter is
8637 "this", but do not crash if it is not. RealView
8638 marks unnamed (and thus unused) parameters as
8639 artificial; there is no way to differentiate
8641 if (TYPE_NFIELDS (type
) > 0
8642 && TYPE_FIELD_ARTIFICIAL (type
, 0)
8643 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
8644 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
8646 fputs_unfiltered (" const", buf
);
8650 std::string intermediate_name
= ui_file_as_string (buf
);
8651 ui_file_delete (buf
);
8653 if (cu
->language
== language_cplus
)
8655 = dwarf2_canonicalize_name (intermediate_name
.c_str (), cu
,
8656 &objfile
->per_bfd
->storage_obstack
);
8658 /* If we only computed INTERMEDIATE_NAME, or if
8659 INTERMEDIATE_NAME is already canonical, then we need to
8660 copy it to the appropriate obstack. */
8661 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
.c_str ())
8662 name
= ((const char *)
8663 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8664 intermediate_name
.c_str (),
8665 intermediate_name
.length ()));
8667 name
= canonical_name
;
8674 /* Return the fully qualified name of DIE, based on its DW_AT_name.
8675 If scope qualifiers are appropriate they will be added. The result
8676 will be allocated on the storage_obstack, or NULL if the DIE does
8677 not have a name. NAME may either be from a previous call to
8678 dwarf2_name or NULL.
8680 The output string will be canonicalized (if C++). */
8683 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
8685 return dwarf2_compute_name (name
, die
, cu
, 0);
8688 /* Construct a physname for the given DIE in CU. NAME may either be
8689 from a previous call to dwarf2_name or NULL. The result will be
8690 allocated on the objfile_objstack or NULL if the DIE does not have a
8693 The output string will be canonicalized (if C++). */
8696 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
8698 struct objfile
*objfile
= cu
->objfile
;
8699 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
8700 struct cleanup
*back_to
;
8703 /* In this case dwarf2_compute_name is just a shortcut not building anything
8705 if (!die_needs_namespace (die
, cu
))
8706 return dwarf2_compute_name (name
, die
, cu
, 1);
8708 back_to
= make_cleanup (null_cleanup
, NULL
);
8710 mangled
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
8711 if (mangled
== NULL
)
8712 mangled
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8714 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
8715 See https://github.com/rust-lang/rust/issues/32925. */
8716 if (cu
->language
== language_rust
&& mangled
!= NULL
8717 && strchr (mangled
, '{') != NULL
)
8720 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
8722 if (mangled
!= NULL
)
8726 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
8727 type. It is easier for GDB users to search for such functions as
8728 `name(params)' than `long name(params)'. In such case the minimal
8729 symbol names do not match the full symbol names but for template
8730 functions there is never a need to look up their definition from their
8731 declaration so the only disadvantage remains the minimal symbol
8732 variant `long name(params)' does not have the proper inferior type.
8735 if (cu
->language
== language_go
)
8737 /* This is a lie, but we already lie to the caller new_symbol_full.
8738 new_symbol_full assumes we return the mangled name.
8739 This just undoes that lie until things are cleaned up. */
8744 demangled
= gdb_demangle (mangled
,
8745 (DMGL_PARAMS
| DMGL_ANSI
| DMGL_RET_DROP
));
8749 make_cleanup (xfree
, demangled
);
8759 if (canon
== NULL
|| check_physname
)
8761 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
8763 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
8765 /* It may not mean a bug in GDB. The compiler could also
8766 compute DW_AT_linkage_name incorrectly. But in such case
8767 GDB would need to be bug-to-bug compatible. */
8769 complaint (&symfile_complaints
,
8770 _("Computed physname <%s> does not match demangled <%s> "
8771 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
8772 physname
, canon
, mangled
, die
->offset
.sect_off
,
8773 objfile_name (objfile
));
8775 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
8776 is available here - over computed PHYSNAME. It is safer
8777 against both buggy GDB and buggy compilers. */
8791 retval
= ((const char *)
8792 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8793 retval
, strlen (retval
)));
8795 do_cleanups (back_to
);
8799 /* Inspect DIE in CU for a namespace alias. If one exists, record
8800 a new symbol for it.
8802 Returns 1 if a namespace alias was recorded, 0 otherwise. */
8805 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
8807 struct attribute
*attr
;
8809 /* If the die does not have a name, this is not a namespace
8811 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
8815 struct die_info
*d
= die
;
8816 struct dwarf2_cu
*imported_cu
= cu
;
8818 /* If the compiler has nested DW_AT_imported_declaration DIEs,
8819 keep inspecting DIEs until we hit the underlying import. */
8820 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
8821 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
8823 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
8827 d
= follow_die_ref (d
, attr
, &imported_cu
);
8828 if (d
->tag
!= DW_TAG_imported_declaration
)
8832 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
8834 complaint (&symfile_complaints
,
8835 _("DIE at 0x%x has too many recursively imported "
8836 "declarations"), d
->offset
.sect_off
);
8843 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
8845 type
= get_die_type_at_offset (offset
, cu
->per_cu
);
8846 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
8848 /* This declaration is a global namespace alias. Add
8849 a symbol for it whose type is the aliased namespace. */
8850 new_symbol (die
, type
, cu
);
8859 /* Return the using directives repository (global or local?) to use in the
8860 current context for LANGUAGE.
8862 For Ada, imported declarations can materialize renamings, which *may* be
8863 global. However it is impossible (for now?) in DWARF to distinguish
8864 "external" imported declarations and "static" ones. As all imported
8865 declarations seem to be static in all other languages, make them all CU-wide
8866 global only in Ada. */
8868 static struct using_direct
**
8869 using_directives (enum language language
)
8871 if (language
== language_ada
&& context_stack_depth
== 0)
8872 return &global_using_directives
;
8874 return &local_using_directives
;
8877 /* Read the import statement specified by the given die and record it. */
8880 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
8882 struct objfile
*objfile
= cu
->objfile
;
8883 struct attribute
*import_attr
;
8884 struct die_info
*imported_die
, *child_die
;
8885 struct dwarf2_cu
*imported_cu
;
8886 const char *imported_name
;
8887 const char *imported_name_prefix
;
8888 const char *canonical_name
;
8889 const char *import_alias
;
8890 const char *imported_declaration
= NULL
;
8891 const char *import_prefix
;
8892 VEC (const_char_ptr
) *excludes
= NULL
;
8893 struct cleanup
*cleanups
;
8895 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8896 if (import_attr
== NULL
)
8898 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
8899 dwarf_tag_name (die
->tag
));
8904 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
8905 imported_name
= dwarf2_name (imported_die
, imported_cu
);
8906 if (imported_name
== NULL
)
8908 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
8910 The import in the following code:
8924 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
8925 <52> DW_AT_decl_file : 1
8926 <53> DW_AT_decl_line : 6
8927 <54> DW_AT_import : <0x75>
8928 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
8930 <5b> DW_AT_decl_file : 1
8931 <5c> DW_AT_decl_line : 2
8932 <5d> DW_AT_type : <0x6e>
8934 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
8935 <76> DW_AT_byte_size : 4
8936 <77> DW_AT_encoding : 5 (signed)
8938 imports the wrong die ( 0x75 instead of 0x58 ).
8939 This case will be ignored until the gcc bug is fixed. */
8943 /* Figure out the local name after import. */
8944 import_alias
= dwarf2_name (die
, cu
);
8946 /* Figure out where the statement is being imported to. */
8947 import_prefix
= determine_prefix (die
, cu
);
8949 /* Figure out what the scope of the imported die is and prepend it
8950 to the name of the imported die. */
8951 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
8953 if (imported_die
->tag
!= DW_TAG_namespace
8954 && imported_die
->tag
!= DW_TAG_module
)
8956 imported_declaration
= imported_name
;
8957 canonical_name
= imported_name_prefix
;
8959 else if (strlen (imported_name_prefix
) > 0)
8960 canonical_name
= obconcat (&objfile
->objfile_obstack
,
8961 imported_name_prefix
,
8962 (cu
->language
== language_d
? "." : "::"),
8963 imported_name
, (char *) NULL
);
8965 canonical_name
= imported_name
;
8967 cleanups
= make_cleanup (VEC_cleanup (const_char_ptr
), &excludes
);
8969 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
8970 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
8971 child_die
= sibling_die (child_die
))
8973 /* DWARF-4: A Fortran use statement with a “rename list” may be
8974 represented by an imported module entry with an import attribute
8975 referring to the module and owned entries corresponding to those
8976 entities that are renamed as part of being imported. */
8978 if (child_die
->tag
!= DW_TAG_imported_declaration
)
8980 complaint (&symfile_complaints
,
8981 _("child DW_TAG_imported_declaration expected "
8982 "- DIE at 0x%x [in module %s]"),
8983 child_die
->offset
.sect_off
, objfile_name (objfile
));
8987 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
8988 if (import_attr
== NULL
)
8990 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
8991 dwarf_tag_name (child_die
->tag
));
8996 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
8998 imported_name
= dwarf2_name (imported_die
, imported_cu
);
8999 if (imported_name
== NULL
)
9001 complaint (&symfile_complaints
,
9002 _("child DW_TAG_imported_declaration has unknown "
9003 "imported name - DIE at 0x%x [in module %s]"),
9004 child_die
->offset
.sect_off
, objfile_name (objfile
));
9008 VEC_safe_push (const_char_ptr
, excludes
, imported_name
);
9010 process_die (child_die
, cu
);
9013 add_using_directive (using_directives (cu
->language
),
9017 imported_declaration
,
9020 &objfile
->objfile_obstack
);
9022 do_cleanups (cleanups
);
9025 /* Cleanup function for handle_DW_AT_stmt_list. */
9028 free_cu_line_header (void *arg
)
9030 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) arg
;
9032 free_line_header (cu
->line_header
);
9033 cu
->line_header
= NULL
;
9036 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
9037 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
9038 this, it was first present in GCC release 4.3.0. */
9041 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
9043 if (!cu
->checked_producer
)
9044 check_producer (cu
);
9046 return cu
->producer_is_gcc_lt_4_3
;
9050 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
9051 const char **name
, const char **comp_dir
)
9053 /* Find the filename. Do not use dwarf2_name here, since the filename
9054 is not a source language identifier. */
9055 *name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
9056 *comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
9058 if (*comp_dir
== NULL
9059 && producer_is_gcc_lt_4_3 (cu
) && *name
!= NULL
9060 && IS_ABSOLUTE_PATH (*name
))
9062 char *d
= ldirname (*name
);
9066 make_cleanup (xfree
, d
);
9068 if (*comp_dir
!= NULL
)
9070 /* Irix 6.2 native cc prepends <machine>.: to the compilation
9071 directory, get rid of it. */
9072 const char *cp
= strchr (*comp_dir
, ':');
9074 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
9079 *name
= "<unknown>";
9082 /* Handle DW_AT_stmt_list for a compilation unit.
9083 DIE is the DW_TAG_compile_unit die for CU.
9084 COMP_DIR is the compilation directory. LOWPC is passed to
9085 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
9088 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
9089 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
9091 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9092 struct attribute
*attr
;
9093 unsigned int line_offset
;
9094 struct line_header line_header_local
;
9095 hashval_t line_header_local_hash
;
9100 gdb_assert (! cu
->per_cu
->is_debug_types
);
9102 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9106 line_offset
= DW_UNSND (attr
);
9108 /* The line header hash table is only created if needed (it exists to
9109 prevent redundant reading of the line table for partial_units).
9110 If we're given a partial_unit, we'll need it. If we're given a
9111 compile_unit, then use the line header hash table if it's already
9112 created, but don't create one just yet. */
9114 if (dwarf2_per_objfile
->line_header_hash
== NULL
9115 && die
->tag
== DW_TAG_partial_unit
)
9117 dwarf2_per_objfile
->line_header_hash
9118 = htab_create_alloc_ex (127, line_header_hash_voidp
,
9119 line_header_eq_voidp
,
9120 free_line_header_voidp
,
9121 &objfile
->objfile_obstack
,
9122 hashtab_obstack_allocate
,
9123 dummy_obstack_deallocate
);
9126 line_header_local
.offset
.sect_off
= line_offset
;
9127 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
9128 line_header_local_hash
= line_header_hash (&line_header_local
);
9129 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
9131 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
9133 line_header_local_hash
, NO_INSERT
);
9135 /* For DW_TAG_compile_unit we need info like symtab::linetable which
9136 is not present in *SLOT (since if there is something in *SLOT then
9137 it will be for a partial_unit). */
9138 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
9140 gdb_assert (*slot
!= NULL
);
9141 cu
->line_header
= (struct line_header
*) *slot
;
9146 /* dwarf_decode_line_header does not yet provide sufficient information.
9147 We always have to call also dwarf_decode_lines for it. */
9148 cu
->line_header
= dwarf_decode_line_header (line_offset
, cu
);
9149 if (cu
->line_header
== NULL
)
9152 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
9156 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
9158 line_header_local_hash
, INSERT
);
9159 gdb_assert (slot
!= NULL
);
9161 if (slot
!= NULL
&& *slot
== NULL
)
9163 /* This newly decoded line number information unit will be owned
9164 by line_header_hash hash table. */
9165 *slot
= cu
->line_header
;
9169 /* We cannot free any current entry in (*slot) as that struct line_header
9170 may be already used by multiple CUs. Create only temporary decoded
9171 line_header for this CU - it may happen at most once for each line
9172 number information unit. And if we're not using line_header_hash
9173 then this is what we want as well. */
9174 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
9175 make_cleanup (free_cu_line_header
, cu
);
9177 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
9178 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
9182 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
9185 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9187 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9188 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9189 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
9190 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
9191 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
9192 struct attribute
*attr
;
9193 const char *name
= NULL
;
9194 const char *comp_dir
= NULL
;
9195 struct die_info
*child_die
;
9198 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9200 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
9202 /* If we didn't find a lowpc, set it to highpc to avoid complaints
9203 from finish_block. */
9204 if (lowpc
== ((CORE_ADDR
) -1))
9206 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
9208 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
9210 prepare_one_comp_unit (cu
, die
, cu
->language
);
9212 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
9213 standardised yet. As a workaround for the language detection we fall
9214 back to the DW_AT_producer string. */
9215 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
9216 cu
->language
= language_opencl
;
9218 /* Similar hack for Go. */
9219 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
9220 set_cu_language (DW_LANG_Go
, cu
);
9222 dwarf2_start_symtab (cu
, name
, comp_dir
, lowpc
);
9224 /* Decode line number information if present. We do this before
9225 processing child DIEs, so that the line header table is available
9226 for DW_AT_decl_file. */
9227 handle_DW_AT_stmt_list (die
, cu
, comp_dir
, lowpc
);
9229 /* Process all dies in compilation unit. */
9230 if (die
->child
!= NULL
)
9232 child_die
= die
->child
;
9233 while (child_die
&& child_die
->tag
)
9235 process_die (child_die
, cu
);
9236 child_die
= sibling_die (child_die
);
9240 /* Decode macro information, if present. Dwarf 2 macro information
9241 refers to information in the line number info statement program
9242 header, so we can only read it if we've read the header
9244 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
9245 if (attr
&& cu
->line_header
)
9247 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
9248 complaint (&symfile_complaints
,
9249 _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
9251 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
9255 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
9256 if (attr
&& cu
->line_header
)
9258 unsigned int macro_offset
= DW_UNSND (attr
);
9260 dwarf_decode_macros (cu
, macro_offset
, 0);
9264 do_cleanups (back_to
);
9267 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
9268 Create the set of symtabs used by this TU, or if this TU is sharing
9269 symtabs with another TU and the symtabs have already been created
9270 then restore those symtabs in the line header.
9271 We don't need the pc/line-number mapping for type units. */
9274 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
9276 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
9277 struct type_unit_group
*tu_group
;
9279 struct line_header
*lh
;
9280 struct attribute
*attr
;
9281 unsigned int i
, line_offset
;
9282 struct signatured_type
*sig_type
;
9284 gdb_assert (per_cu
->is_debug_types
);
9285 sig_type
= (struct signatured_type
*) per_cu
;
9287 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9289 /* If we're using .gdb_index (includes -readnow) then
9290 per_cu->type_unit_group may not have been set up yet. */
9291 if (sig_type
->type_unit_group
== NULL
)
9292 sig_type
->type_unit_group
= get_type_unit_group (cu
, attr
);
9293 tu_group
= sig_type
->type_unit_group
;
9295 /* If we've already processed this stmt_list there's no real need to
9296 do it again, we could fake it and just recreate the part we need
9297 (file name,index -> symtab mapping). If data shows this optimization
9298 is useful we can do it then. */
9299 first_time
= tu_group
->compunit_symtab
== NULL
;
9301 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
9306 line_offset
= DW_UNSND (attr
);
9307 lh
= dwarf_decode_line_header (line_offset
, cu
);
9312 dwarf2_start_symtab (cu
, "", NULL
, 0);
9315 gdb_assert (tu_group
->symtabs
== NULL
);
9316 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9321 cu
->line_header
= lh
;
9322 make_cleanup (free_cu_line_header
, cu
);
9326 struct compunit_symtab
*cust
= dwarf2_start_symtab (cu
, "", NULL
, 0);
9328 /* Note: We don't assign tu_group->compunit_symtab yet because we're
9329 still initializing it, and our caller (a few levels up)
9330 process_full_type_unit still needs to know if this is the first
9333 tu_group
->num_symtabs
= lh
->num_file_names
;
9334 tu_group
->symtabs
= XNEWVEC (struct symtab
*, lh
->num_file_names
);
9336 for (i
= 0; i
< lh
->num_file_names
; ++i
)
9338 const char *dir
= NULL
;
9339 struct file_entry
*fe
= &lh
->file_names
[i
];
9341 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
9342 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
9343 dwarf2_start_subfile (fe
->name
, dir
);
9345 if (current_subfile
->symtab
== NULL
)
9347 /* NOTE: start_subfile will recognize when it's been passed
9348 a file it has already seen. So we can't assume there's a
9349 simple mapping from lh->file_names to subfiles, plus
9350 lh->file_names may contain dups. */
9351 current_subfile
->symtab
9352 = allocate_symtab (cust
, current_subfile
->name
);
9355 fe
->symtab
= current_subfile
->symtab
;
9356 tu_group
->symtabs
[i
] = fe
->symtab
;
9361 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9363 for (i
= 0; i
< lh
->num_file_names
; ++i
)
9365 struct file_entry
*fe
= &lh
->file_names
[i
];
9367 fe
->symtab
= tu_group
->symtabs
[i
];
9371 /* The main symtab is allocated last. Type units don't have DW_AT_name
9372 so they don't have a "real" (so to speak) symtab anyway.
9373 There is later code that will assign the main symtab to all symbols
9374 that don't have one. We need to handle the case of a symbol with a
9375 missing symtab (DW_AT_decl_file) anyway. */
9378 /* Process DW_TAG_type_unit.
9379 For TUs we want to skip the first top level sibling if it's not the
9380 actual type being defined by this TU. In this case the first top
9381 level sibling is there to provide context only. */
9384 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9386 struct die_info
*child_die
;
9388 prepare_one_comp_unit (cu
, die
, language_minimal
);
9390 /* Initialize (or reinitialize) the machinery for building symtabs.
9391 We do this before processing child DIEs, so that the line header table
9392 is available for DW_AT_decl_file. */
9393 setup_type_unit_groups (die
, cu
);
9395 if (die
->child
!= NULL
)
9397 child_die
= die
->child
;
9398 while (child_die
&& child_die
->tag
)
9400 process_die (child_die
, cu
);
9401 child_die
= sibling_die (child_die
);
9408 http://gcc.gnu.org/wiki/DebugFission
9409 http://gcc.gnu.org/wiki/DebugFissionDWP
9411 To simplify handling of both DWO files ("object" files with the DWARF info)
9412 and DWP files (a file with the DWOs packaged up into one file), we treat
9413 DWP files as having a collection of virtual DWO files. */
9416 hash_dwo_file (const void *item
)
9418 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
9421 hash
= htab_hash_string (dwo_file
->dwo_name
);
9422 if (dwo_file
->comp_dir
!= NULL
)
9423 hash
+= htab_hash_string (dwo_file
->comp_dir
);
9428 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
9430 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
9431 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
9433 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
9435 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
9436 return lhs
->comp_dir
== rhs
->comp_dir
;
9437 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
9440 /* Allocate a hash table for DWO files. */
9443 allocate_dwo_file_hash_table (void)
9445 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9447 return htab_create_alloc_ex (41,
9451 &objfile
->objfile_obstack
,
9452 hashtab_obstack_allocate
,
9453 dummy_obstack_deallocate
);
9456 /* Lookup DWO file DWO_NAME. */
9459 lookup_dwo_file_slot (const char *dwo_name
, const char *comp_dir
)
9461 struct dwo_file find_entry
;
9464 if (dwarf2_per_objfile
->dwo_files
== NULL
)
9465 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
9467 memset (&find_entry
, 0, sizeof (find_entry
));
9468 find_entry
.dwo_name
= dwo_name
;
9469 find_entry
.comp_dir
= comp_dir
;
9470 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
9476 hash_dwo_unit (const void *item
)
9478 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
9480 /* This drops the top 32 bits of the id, but is ok for a hash. */
9481 return dwo_unit
->signature
;
9485 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
9487 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
9488 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
9490 /* The signature is assumed to be unique within the DWO file.
9491 So while object file CU dwo_id's always have the value zero,
9492 that's OK, assuming each object file DWO file has only one CU,
9493 and that's the rule for now. */
9494 return lhs
->signature
== rhs
->signature
;
9497 /* Allocate a hash table for DWO CUs,TUs.
9498 There is one of these tables for each of CUs,TUs for each DWO file. */
9501 allocate_dwo_unit_table (struct objfile
*objfile
)
9503 /* Start out with a pretty small number.
9504 Generally DWO files contain only one CU and maybe some TUs. */
9505 return htab_create_alloc_ex (3,
9509 &objfile
->objfile_obstack
,
9510 hashtab_obstack_allocate
,
9511 dummy_obstack_deallocate
);
9514 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
9516 struct create_dwo_cu_data
9518 struct dwo_file
*dwo_file
;
9519 struct dwo_unit dwo_unit
;
9522 /* die_reader_func for create_dwo_cu. */
9525 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
9526 const gdb_byte
*info_ptr
,
9527 struct die_info
*comp_unit_die
,
9531 struct dwarf2_cu
*cu
= reader
->cu
;
9532 sect_offset offset
= cu
->per_cu
->offset
;
9533 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
9534 struct create_dwo_cu_data
*data
= (struct create_dwo_cu_data
*) datap
;
9535 struct dwo_file
*dwo_file
= data
->dwo_file
;
9536 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
9537 struct attribute
*attr
;
9539 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
9542 complaint (&symfile_complaints
,
9543 _("Dwarf Error: debug entry at offset 0x%x is missing"
9544 " its dwo_id [in module %s]"),
9545 offset
.sect_off
, dwo_file
->dwo_name
);
9549 dwo_unit
->dwo_file
= dwo_file
;
9550 dwo_unit
->signature
= DW_UNSND (attr
);
9551 dwo_unit
->section
= section
;
9552 dwo_unit
->offset
= offset
;
9553 dwo_unit
->length
= cu
->per_cu
->length
;
9555 if (dwarf_read_debug
)
9556 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, dwo_id %s\n",
9557 offset
.sect_off
, hex_string (dwo_unit
->signature
));
9560 /* Create the dwo_unit for the lone CU in DWO_FILE.
9561 Note: This function processes DWO files only, not DWP files. */
9563 static struct dwo_unit
*
9564 create_dwo_cu (struct dwo_file
*dwo_file
)
9566 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9567 struct dwarf2_section_info
*section
= &dwo_file
->sections
.info
;
9568 const gdb_byte
*info_ptr
, *end_ptr
;
9569 struct create_dwo_cu_data create_dwo_cu_data
;
9570 struct dwo_unit
*dwo_unit
;
9572 dwarf2_read_section (objfile
, section
);
9573 info_ptr
= section
->buffer
;
9575 if (info_ptr
== NULL
)
9578 if (dwarf_read_debug
)
9580 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
9581 get_section_name (section
),
9582 get_section_file_name (section
));
9585 create_dwo_cu_data
.dwo_file
= dwo_file
;
9588 end_ptr
= info_ptr
+ section
->size
;
9589 while (info_ptr
< end_ptr
)
9591 struct dwarf2_per_cu_data per_cu
;
9593 memset (&create_dwo_cu_data
.dwo_unit
, 0,
9594 sizeof (create_dwo_cu_data
.dwo_unit
));
9595 memset (&per_cu
, 0, sizeof (per_cu
));
9596 per_cu
.objfile
= objfile
;
9597 per_cu
.is_debug_types
= 0;
9598 per_cu
.offset
.sect_off
= info_ptr
- section
->buffer
;
9599 per_cu
.section
= section
;
9601 init_cutu_and_read_dies_no_follow (&per_cu
, dwo_file
,
9602 create_dwo_cu_reader
,
9603 &create_dwo_cu_data
);
9605 if (create_dwo_cu_data
.dwo_unit
.dwo_file
!= NULL
)
9607 /* If we've already found one, complain. We only support one
9608 because having more than one requires hacking the dwo_name of
9609 each to match, which is highly unlikely to happen. */
9610 if (dwo_unit
!= NULL
)
9612 complaint (&symfile_complaints
,
9613 _("Multiple CUs in DWO file %s [in module %s]"),
9614 dwo_file
->dwo_name
, objfile_name (objfile
));
9618 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
9619 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
9622 info_ptr
+= per_cu
.length
;
9628 /* DWP file .debug_{cu,tu}_index section format:
9629 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
9633 Both index sections have the same format, and serve to map a 64-bit
9634 signature to a set of section numbers. Each section begins with a header,
9635 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
9636 indexes, and a pool of 32-bit section numbers. The index sections will be
9637 aligned at 8-byte boundaries in the file.
9639 The index section header consists of:
9641 V, 32 bit version number
9643 N, 32 bit number of compilation units or type units in the index
9644 M, 32 bit number of slots in the hash table
9646 Numbers are recorded using the byte order of the application binary.
9648 The hash table begins at offset 16 in the section, and consists of an array
9649 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
9650 order of the application binary). Unused slots in the hash table are 0.
9651 (We rely on the extreme unlikeliness of a signature being exactly 0.)
9653 The parallel table begins immediately after the hash table
9654 (at offset 16 + 8 * M from the beginning of the section), and consists of an
9655 array of 32-bit indexes (using the byte order of the application binary),
9656 corresponding 1-1 with slots in the hash table. Each entry in the parallel
9657 table contains a 32-bit index into the pool of section numbers. For unused
9658 hash table slots, the corresponding entry in the parallel table will be 0.
9660 The pool of section numbers begins immediately following the hash table
9661 (at offset 16 + 12 * M from the beginning of the section). The pool of
9662 section numbers consists of an array of 32-bit words (using the byte order
9663 of the application binary). Each item in the array is indexed starting
9664 from 0. The hash table entry provides the index of the first section
9665 number in the set. Additional section numbers in the set follow, and the
9666 set is terminated by a 0 entry (section number 0 is not used in ELF).
9668 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
9669 section must be the first entry in the set, and the .debug_abbrev.dwo must
9670 be the second entry. Other members of the set may follow in any order.
9676 DWP Version 2 combines all the .debug_info, etc. sections into one,
9677 and the entries in the index tables are now offsets into these sections.
9678 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
9681 Index Section Contents:
9683 Hash Table of Signatures dwp_hash_table.hash_table
9684 Parallel Table of Indices dwp_hash_table.unit_table
9685 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
9686 Table of Section Sizes dwp_hash_table.v2.sizes
9688 The index section header consists of:
9690 V, 32 bit version number
9691 L, 32 bit number of columns in the table of section offsets
9692 N, 32 bit number of compilation units or type units in the index
9693 M, 32 bit number of slots in the hash table
9695 Numbers are recorded using the byte order of the application binary.
9697 The hash table has the same format as version 1.
9698 The parallel table of indices has the same format as version 1,
9699 except that the entries are origin-1 indices into the table of sections
9700 offsets and the table of section sizes.
9702 The table of offsets begins immediately following the parallel table
9703 (at offset 16 + 12 * M from the beginning of the section). The table is
9704 a two-dimensional array of 32-bit words (using the byte order of the
9705 application binary), with L columns and N+1 rows, in row-major order.
9706 Each row in the array is indexed starting from 0. The first row provides
9707 a key to the remaining rows: each column in this row provides an identifier
9708 for a debug section, and the offsets in the same column of subsequent rows
9709 refer to that section. The section identifiers are:
9711 DW_SECT_INFO 1 .debug_info.dwo
9712 DW_SECT_TYPES 2 .debug_types.dwo
9713 DW_SECT_ABBREV 3 .debug_abbrev.dwo
9714 DW_SECT_LINE 4 .debug_line.dwo
9715 DW_SECT_LOC 5 .debug_loc.dwo
9716 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
9717 DW_SECT_MACINFO 7 .debug_macinfo.dwo
9718 DW_SECT_MACRO 8 .debug_macro.dwo
9720 The offsets provided by the CU and TU index sections are the base offsets
9721 for the contributions made by each CU or TU to the corresponding section
9722 in the package file. Each CU and TU header contains an abbrev_offset
9723 field, used to find the abbreviations table for that CU or TU within the
9724 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
9725 be interpreted as relative to the base offset given in the index section.
9726 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
9727 should be interpreted as relative to the base offset for .debug_line.dwo,
9728 and offsets into other debug sections obtained from DWARF attributes should
9729 also be interpreted as relative to the corresponding base offset.
9731 The table of sizes begins immediately following the table of offsets.
9732 Like the table of offsets, it is a two-dimensional array of 32-bit words,
9733 with L columns and N rows, in row-major order. Each row in the array is
9734 indexed starting from 1 (row 0 is shared by the two tables).
9738 Hash table lookup is handled the same in version 1 and 2:
9740 We assume that N and M will not exceed 2^32 - 1.
9741 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
9743 Given a 64-bit compilation unit signature or a type signature S, an entry
9744 in the hash table is located as follows:
9746 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
9747 the low-order k bits all set to 1.
9749 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
9751 3) If the hash table entry at index H matches the signature, use that
9752 entry. If the hash table entry at index H is unused (all zeroes),
9753 terminate the search: the signature is not present in the table.
9755 4) Let H = (H + H') modulo M. Repeat at Step 3.
9757 Because M > N and H' and M are relatively prime, the search is guaranteed
9758 to stop at an unused slot or find the match. */
9760 /* Create a hash table to map DWO IDs to their CU/TU entry in
9761 .debug_{info,types}.dwo in DWP_FILE.
9762 Returns NULL if there isn't one.
9763 Note: This function processes DWP files only, not DWO files. */
9765 static struct dwp_hash_table
*
9766 create_dwp_hash_table (struct dwp_file
*dwp_file
, int is_debug_types
)
9768 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9769 bfd
*dbfd
= dwp_file
->dbfd
;
9770 const gdb_byte
*index_ptr
, *index_end
;
9771 struct dwarf2_section_info
*index
;
9772 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
9773 struct dwp_hash_table
*htab
;
9776 index
= &dwp_file
->sections
.tu_index
;
9778 index
= &dwp_file
->sections
.cu_index
;
9780 if (dwarf2_section_empty_p (index
))
9782 dwarf2_read_section (objfile
, index
);
9784 index_ptr
= index
->buffer
;
9785 index_end
= index_ptr
+ index
->size
;
9787 version
= read_4_bytes (dbfd
, index_ptr
);
9790 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
9794 nr_units
= read_4_bytes (dbfd
, index_ptr
);
9796 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
9799 if (version
!= 1 && version
!= 2)
9801 error (_("Dwarf Error: unsupported DWP file version (%s)"
9803 pulongest (version
), dwp_file
->name
);
9805 if (nr_slots
!= (nr_slots
& -nr_slots
))
9807 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
9808 " is not power of 2 [in module %s]"),
9809 pulongest (nr_slots
), dwp_file
->name
);
9812 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
9813 htab
->version
= version
;
9814 htab
->nr_columns
= nr_columns
;
9815 htab
->nr_units
= nr_units
;
9816 htab
->nr_slots
= nr_slots
;
9817 htab
->hash_table
= index_ptr
;
9818 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
9820 /* Exit early if the table is empty. */
9821 if (nr_slots
== 0 || nr_units
== 0
9822 || (version
== 2 && nr_columns
== 0))
9824 /* All must be zero. */
9825 if (nr_slots
!= 0 || nr_units
!= 0
9826 || (version
== 2 && nr_columns
!= 0))
9828 complaint (&symfile_complaints
,
9829 _("Empty DWP but nr_slots,nr_units,nr_columns not"
9830 " all zero [in modules %s]"),
9838 htab
->section_pool
.v1
.indices
=
9839 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
9840 /* It's harder to decide whether the section is too small in v1.
9841 V1 is deprecated anyway so we punt. */
9845 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
9846 int *ids
= htab
->section_pool
.v2
.section_ids
;
9847 /* Reverse map for error checking. */
9848 int ids_seen
[DW_SECT_MAX
+ 1];
9853 error (_("Dwarf Error: bad DWP hash table, too few columns"
9854 " in section table [in module %s]"),
9857 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
9859 error (_("Dwarf Error: bad DWP hash table, too many columns"
9860 " in section table [in module %s]"),
9863 memset (ids
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
9864 memset (ids_seen
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
9865 for (i
= 0; i
< nr_columns
; ++i
)
9867 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
9869 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
9871 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
9872 " in section table [in module %s]"),
9873 id
, dwp_file
->name
);
9875 if (ids_seen
[id
] != -1)
9877 error (_("Dwarf Error: bad DWP hash table, duplicate section"
9878 " id %d in section table [in module %s]"),
9879 id
, dwp_file
->name
);
9884 /* Must have exactly one info or types section. */
9885 if (((ids_seen
[DW_SECT_INFO
] != -1)
9886 + (ids_seen
[DW_SECT_TYPES
] != -1))
9889 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
9890 " DWO info/types section [in module %s]"),
9893 /* Must have an abbrev section. */
9894 if (ids_seen
[DW_SECT_ABBREV
] == -1)
9896 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
9897 " section [in module %s]"),
9900 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
9901 htab
->section_pool
.v2
.sizes
=
9902 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
9903 * nr_units
* nr_columns
);
9904 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
9905 * nr_units
* nr_columns
))
9908 error (_("Dwarf Error: DWP index section is corrupt (too small)"
9917 /* Update SECTIONS with the data from SECTP.
9919 This function is like the other "locate" section routines that are
9920 passed to bfd_map_over_sections, but in this context the sections to
9921 read comes from the DWP V1 hash table, not the full ELF section table.
9923 The result is non-zero for success, or zero if an error was found. */
9926 locate_v1_virtual_dwo_sections (asection
*sectp
,
9927 struct virtual_v1_dwo_sections
*sections
)
9929 const struct dwop_section_names
*names
= &dwop_section_names
;
9931 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
9933 /* There can be only one. */
9934 if (sections
->abbrev
.s
.section
!= NULL
)
9936 sections
->abbrev
.s
.section
= sectp
;
9937 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
9939 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
9940 || section_is_p (sectp
->name
, &names
->types_dwo
))
9942 /* There can be only one. */
9943 if (sections
->info_or_types
.s
.section
!= NULL
)
9945 sections
->info_or_types
.s
.section
= sectp
;
9946 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
9948 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
9950 /* There can be only one. */
9951 if (sections
->line
.s
.section
!= NULL
)
9953 sections
->line
.s
.section
= sectp
;
9954 sections
->line
.size
= bfd_get_section_size (sectp
);
9956 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
9958 /* There can be only one. */
9959 if (sections
->loc
.s
.section
!= NULL
)
9961 sections
->loc
.s
.section
= sectp
;
9962 sections
->loc
.size
= bfd_get_section_size (sectp
);
9964 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
9966 /* There can be only one. */
9967 if (sections
->macinfo
.s
.section
!= NULL
)
9969 sections
->macinfo
.s
.section
= sectp
;
9970 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
9972 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
9974 /* There can be only one. */
9975 if (sections
->macro
.s
.section
!= NULL
)
9977 sections
->macro
.s
.section
= sectp
;
9978 sections
->macro
.size
= bfd_get_section_size (sectp
);
9980 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
9982 /* There can be only one. */
9983 if (sections
->str_offsets
.s
.section
!= NULL
)
9985 sections
->str_offsets
.s
.section
= sectp
;
9986 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
9990 /* No other kind of section is valid. */
9997 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
9998 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
9999 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
10000 This is for DWP version 1 files. */
10002 static struct dwo_unit
*
10003 create_dwo_unit_in_dwp_v1 (struct dwp_file
*dwp_file
,
10004 uint32_t unit_index
,
10005 const char *comp_dir
,
10006 ULONGEST signature
, int is_debug_types
)
10008 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10009 const struct dwp_hash_table
*dwp_htab
=
10010 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10011 bfd
*dbfd
= dwp_file
->dbfd
;
10012 const char *kind
= is_debug_types
? "TU" : "CU";
10013 struct dwo_file
*dwo_file
;
10014 struct dwo_unit
*dwo_unit
;
10015 struct virtual_v1_dwo_sections sections
;
10016 void **dwo_file_slot
;
10017 char *virtual_dwo_name
;
10018 struct cleanup
*cleanups
;
10021 gdb_assert (dwp_file
->version
== 1);
10023 if (dwarf_read_debug
)
10025 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
10027 pulongest (unit_index
), hex_string (signature
),
10031 /* Fetch the sections of this DWO unit.
10032 Put a limit on the number of sections we look for so that bad data
10033 doesn't cause us to loop forever. */
10035 #define MAX_NR_V1_DWO_SECTIONS \
10036 (1 /* .debug_info or .debug_types */ \
10037 + 1 /* .debug_abbrev */ \
10038 + 1 /* .debug_line */ \
10039 + 1 /* .debug_loc */ \
10040 + 1 /* .debug_str_offsets */ \
10041 + 1 /* .debug_macro or .debug_macinfo */ \
10042 + 1 /* trailing zero */)
10044 memset (§ions
, 0, sizeof (sections
));
10045 cleanups
= make_cleanup (null_cleanup
, 0);
10047 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
10050 uint32_t section_nr
=
10051 read_4_bytes (dbfd
,
10052 dwp_htab
->section_pool
.v1
.indices
10053 + (unit_index
+ i
) * sizeof (uint32_t));
10055 if (section_nr
== 0)
10057 if (section_nr
>= dwp_file
->num_sections
)
10059 error (_("Dwarf Error: bad DWP hash table, section number too large"
10060 " [in module %s]"),
10064 sectp
= dwp_file
->elf_sections
[section_nr
];
10065 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
10067 error (_("Dwarf Error: bad DWP hash table, invalid section found"
10068 " [in module %s]"),
10074 || dwarf2_section_empty_p (§ions
.info_or_types
)
10075 || dwarf2_section_empty_p (§ions
.abbrev
))
10077 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
10078 " [in module %s]"),
10081 if (i
== MAX_NR_V1_DWO_SECTIONS
)
10083 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
10084 " [in module %s]"),
10088 /* It's easier for the rest of the code if we fake a struct dwo_file and
10089 have dwo_unit "live" in that. At least for now.
10091 The DWP file can be made up of a random collection of CUs and TUs.
10092 However, for each CU + set of TUs that came from the same original DWO
10093 file, we can combine them back into a virtual DWO file to save space
10094 (fewer struct dwo_file objects to allocate). Remember that for really
10095 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10098 xstrprintf ("virtual-dwo/%d-%d-%d-%d",
10099 get_section_id (§ions
.abbrev
),
10100 get_section_id (§ions
.line
),
10101 get_section_id (§ions
.loc
),
10102 get_section_id (§ions
.str_offsets
));
10103 make_cleanup (xfree
, virtual_dwo_name
);
10104 /* Can we use an existing virtual DWO file? */
10105 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
10106 /* Create one if necessary. */
10107 if (*dwo_file_slot
== NULL
)
10109 if (dwarf_read_debug
)
10111 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
10114 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10116 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
10118 strlen (virtual_dwo_name
));
10119 dwo_file
->comp_dir
= comp_dir
;
10120 dwo_file
->sections
.abbrev
= sections
.abbrev
;
10121 dwo_file
->sections
.line
= sections
.line
;
10122 dwo_file
->sections
.loc
= sections
.loc
;
10123 dwo_file
->sections
.macinfo
= sections
.macinfo
;
10124 dwo_file
->sections
.macro
= sections
.macro
;
10125 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
10126 /* The "str" section is global to the entire DWP file. */
10127 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10128 /* The info or types section is assigned below to dwo_unit,
10129 there's no need to record it in dwo_file.
10130 Also, we can't simply record type sections in dwo_file because
10131 we record a pointer into the vector in dwo_unit. As we collect more
10132 types we'll grow the vector and eventually have to reallocate space
10133 for it, invalidating all copies of pointers into the previous
10135 *dwo_file_slot
= dwo_file
;
10139 if (dwarf_read_debug
)
10141 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10144 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
10146 do_cleanups (cleanups
);
10148 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10149 dwo_unit
->dwo_file
= dwo_file
;
10150 dwo_unit
->signature
= signature
;
10151 dwo_unit
->section
=
10152 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
10153 *dwo_unit
->section
= sections
.info_or_types
;
10154 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10159 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
10160 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
10161 piece within that section used by a TU/CU, return a virtual section
10162 of just that piece. */
10164 static struct dwarf2_section_info
10165 create_dwp_v2_section (struct dwarf2_section_info
*section
,
10166 bfd_size_type offset
, bfd_size_type size
)
10168 struct dwarf2_section_info result
;
10171 gdb_assert (section
!= NULL
);
10172 gdb_assert (!section
->is_virtual
);
10174 memset (&result
, 0, sizeof (result
));
10175 result
.s
.containing_section
= section
;
10176 result
.is_virtual
= 1;
10181 sectp
= get_section_bfd_section (section
);
10183 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
10184 bounds of the real section. This is a pretty-rare event, so just
10185 flag an error (easier) instead of a warning and trying to cope. */
10187 || offset
+ size
> bfd_get_section_size (sectp
))
10189 bfd
*abfd
= sectp
->owner
;
10191 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
10192 " in section %s [in module %s]"),
10193 sectp
? bfd_section_name (abfd
, sectp
) : "<unknown>",
10194 objfile_name (dwarf2_per_objfile
->objfile
));
10197 result
.virtual_offset
= offset
;
10198 result
.size
= size
;
10202 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
10203 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
10204 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
10205 This is for DWP version 2 files. */
10207 static struct dwo_unit
*
10208 create_dwo_unit_in_dwp_v2 (struct dwp_file
*dwp_file
,
10209 uint32_t unit_index
,
10210 const char *comp_dir
,
10211 ULONGEST signature
, int is_debug_types
)
10213 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10214 const struct dwp_hash_table
*dwp_htab
=
10215 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10216 bfd
*dbfd
= dwp_file
->dbfd
;
10217 const char *kind
= is_debug_types
? "TU" : "CU";
10218 struct dwo_file
*dwo_file
;
10219 struct dwo_unit
*dwo_unit
;
10220 struct virtual_v2_dwo_sections sections
;
10221 void **dwo_file_slot
;
10222 char *virtual_dwo_name
;
10223 struct cleanup
*cleanups
;
10226 gdb_assert (dwp_file
->version
== 2);
10228 if (dwarf_read_debug
)
10230 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
10232 pulongest (unit_index
), hex_string (signature
),
10236 /* Fetch the section offsets of this DWO unit. */
10238 memset (§ions
, 0, sizeof (sections
));
10239 cleanups
= make_cleanup (null_cleanup
, 0);
10241 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
10243 uint32_t offset
= read_4_bytes (dbfd
,
10244 dwp_htab
->section_pool
.v2
.offsets
10245 + (((unit_index
- 1) * dwp_htab
->nr_columns
10247 * sizeof (uint32_t)));
10248 uint32_t size
= read_4_bytes (dbfd
,
10249 dwp_htab
->section_pool
.v2
.sizes
10250 + (((unit_index
- 1) * dwp_htab
->nr_columns
10252 * sizeof (uint32_t)));
10254 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
10257 case DW_SECT_TYPES
:
10258 sections
.info_or_types_offset
= offset
;
10259 sections
.info_or_types_size
= size
;
10261 case DW_SECT_ABBREV
:
10262 sections
.abbrev_offset
= offset
;
10263 sections
.abbrev_size
= size
;
10266 sections
.line_offset
= offset
;
10267 sections
.line_size
= size
;
10270 sections
.loc_offset
= offset
;
10271 sections
.loc_size
= size
;
10273 case DW_SECT_STR_OFFSETS
:
10274 sections
.str_offsets_offset
= offset
;
10275 sections
.str_offsets_size
= size
;
10277 case DW_SECT_MACINFO
:
10278 sections
.macinfo_offset
= offset
;
10279 sections
.macinfo_size
= size
;
10281 case DW_SECT_MACRO
:
10282 sections
.macro_offset
= offset
;
10283 sections
.macro_size
= size
;
10288 /* It's easier for the rest of the code if we fake a struct dwo_file and
10289 have dwo_unit "live" in that. At least for now.
10291 The DWP file can be made up of a random collection of CUs and TUs.
10292 However, for each CU + set of TUs that came from the same original DWO
10293 file, we can combine them back into a virtual DWO file to save space
10294 (fewer struct dwo_file objects to allocate). Remember that for really
10295 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10298 xstrprintf ("virtual-dwo/%ld-%ld-%ld-%ld",
10299 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
10300 (long) (sections
.line_size
? sections
.line_offset
: 0),
10301 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
10302 (long) (sections
.str_offsets_size
10303 ? sections
.str_offsets_offset
: 0));
10304 make_cleanup (xfree
, virtual_dwo_name
);
10305 /* Can we use an existing virtual DWO file? */
10306 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
10307 /* Create one if necessary. */
10308 if (*dwo_file_slot
== NULL
)
10310 if (dwarf_read_debug
)
10312 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
10315 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10317 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
10319 strlen (virtual_dwo_name
));
10320 dwo_file
->comp_dir
= comp_dir
;
10321 dwo_file
->sections
.abbrev
=
10322 create_dwp_v2_section (&dwp_file
->sections
.abbrev
,
10323 sections
.abbrev_offset
, sections
.abbrev_size
);
10324 dwo_file
->sections
.line
=
10325 create_dwp_v2_section (&dwp_file
->sections
.line
,
10326 sections
.line_offset
, sections
.line_size
);
10327 dwo_file
->sections
.loc
=
10328 create_dwp_v2_section (&dwp_file
->sections
.loc
,
10329 sections
.loc_offset
, sections
.loc_size
);
10330 dwo_file
->sections
.macinfo
=
10331 create_dwp_v2_section (&dwp_file
->sections
.macinfo
,
10332 sections
.macinfo_offset
, sections
.macinfo_size
);
10333 dwo_file
->sections
.macro
=
10334 create_dwp_v2_section (&dwp_file
->sections
.macro
,
10335 sections
.macro_offset
, sections
.macro_size
);
10336 dwo_file
->sections
.str_offsets
=
10337 create_dwp_v2_section (&dwp_file
->sections
.str_offsets
,
10338 sections
.str_offsets_offset
,
10339 sections
.str_offsets_size
);
10340 /* The "str" section is global to the entire DWP file. */
10341 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10342 /* The info or types section is assigned below to dwo_unit,
10343 there's no need to record it in dwo_file.
10344 Also, we can't simply record type sections in dwo_file because
10345 we record a pointer into the vector in dwo_unit. As we collect more
10346 types we'll grow the vector and eventually have to reallocate space
10347 for it, invalidating all copies of pointers into the previous
10349 *dwo_file_slot
= dwo_file
;
10353 if (dwarf_read_debug
)
10355 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10358 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
10360 do_cleanups (cleanups
);
10362 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10363 dwo_unit
->dwo_file
= dwo_file
;
10364 dwo_unit
->signature
= signature
;
10365 dwo_unit
->section
=
10366 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
10367 *dwo_unit
->section
= create_dwp_v2_section (is_debug_types
10368 ? &dwp_file
->sections
.types
10369 : &dwp_file
->sections
.info
,
10370 sections
.info_or_types_offset
,
10371 sections
.info_or_types_size
);
10372 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10377 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
10378 Returns NULL if the signature isn't found. */
10380 static struct dwo_unit
*
10381 lookup_dwo_unit_in_dwp (struct dwp_file
*dwp_file
, const char *comp_dir
,
10382 ULONGEST signature
, int is_debug_types
)
10384 const struct dwp_hash_table
*dwp_htab
=
10385 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10386 bfd
*dbfd
= dwp_file
->dbfd
;
10387 uint32_t mask
= dwp_htab
->nr_slots
- 1;
10388 uint32_t hash
= signature
& mask
;
10389 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
10392 struct dwo_unit find_dwo_cu
;
10394 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
10395 find_dwo_cu
.signature
= signature
;
10396 slot
= htab_find_slot (is_debug_types
10397 ? dwp_file
->loaded_tus
10398 : dwp_file
->loaded_cus
,
10399 &find_dwo_cu
, INSERT
);
10402 return (struct dwo_unit
*) *slot
;
10404 /* Use a for loop so that we don't loop forever on bad debug info. */
10405 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
10407 ULONGEST signature_in_table
;
10409 signature_in_table
=
10410 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
10411 if (signature_in_table
== signature
)
10413 uint32_t unit_index
=
10414 read_4_bytes (dbfd
,
10415 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
10417 if (dwp_file
->version
== 1)
10419 *slot
= create_dwo_unit_in_dwp_v1 (dwp_file
, unit_index
,
10420 comp_dir
, signature
,
10425 *slot
= create_dwo_unit_in_dwp_v2 (dwp_file
, unit_index
,
10426 comp_dir
, signature
,
10429 return (struct dwo_unit
*) *slot
;
10431 if (signature_in_table
== 0)
10433 hash
= (hash
+ hash2
) & mask
;
10436 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
10437 " [in module %s]"),
10441 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
10442 Open the file specified by FILE_NAME and hand it off to BFD for
10443 preliminary analysis. Return a newly initialized bfd *, which
10444 includes a canonicalized copy of FILE_NAME.
10445 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
10446 SEARCH_CWD is true if the current directory is to be searched.
10447 It will be searched before debug-file-directory.
10448 If successful, the file is added to the bfd include table of the
10449 objfile's bfd (see gdb_bfd_record_inclusion).
10450 If unable to find/open the file, return NULL.
10451 NOTE: This function is derived from symfile_bfd_open. */
10453 static gdb_bfd_ref_ptr
10454 try_open_dwop_file (const char *file_name
, int is_dwp
, int search_cwd
)
10457 char *absolute_name
;
10458 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
10459 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
10460 to debug_file_directory. */
10462 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
10466 if (*debug_file_directory
!= '\0')
10467 search_path
= concat (".", dirname_separator_string
,
10468 debug_file_directory
, (char *) NULL
);
10470 search_path
= xstrdup (".");
10473 search_path
= xstrdup (debug_file_directory
);
10475 flags
= OPF_RETURN_REALPATH
;
10477 flags
|= OPF_SEARCH_IN_PATH
;
10478 desc
= openp (search_path
, flags
, file_name
,
10479 O_RDONLY
| O_BINARY
, &absolute_name
);
10480 xfree (search_path
);
10484 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (absolute_name
, gnutarget
, desc
));
10485 xfree (absolute_name
);
10486 if (sym_bfd
== NULL
)
10488 bfd_set_cacheable (sym_bfd
.get (), 1);
10490 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
10493 /* Success. Record the bfd as having been included by the objfile's bfd.
10494 This is important because things like demangled_names_hash lives in the
10495 objfile's per_bfd space and may have references to things like symbol
10496 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
10497 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
.get ());
10502 /* Try to open DWO file FILE_NAME.
10503 COMP_DIR is the DW_AT_comp_dir attribute.
10504 The result is the bfd handle of the file.
10505 If there is a problem finding or opening the file, return NULL.
10506 Upon success, the canonicalized path of the file is stored in the bfd,
10507 same as symfile_bfd_open. */
10509 static gdb_bfd_ref_ptr
10510 open_dwo_file (const char *file_name
, const char *comp_dir
)
10512 if (IS_ABSOLUTE_PATH (file_name
))
10513 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 0 /*search_cwd*/);
10515 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
10517 if (comp_dir
!= NULL
)
10519 char *path_to_try
= concat (comp_dir
, SLASH_STRING
,
10520 file_name
, (char *) NULL
);
10522 /* NOTE: If comp_dir is a relative path, this will also try the
10523 search path, which seems useful. */
10524 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (path_to_try
, 0 /*is_dwp*/,
10525 1 /*search_cwd*/));
10526 xfree (path_to_try
);
10531 /* That didn't work, try debug-file-directory, which, despite its name,
10532 is a list of paths. */
10534 if (*debug_file_directory
== '\0')
10537 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 1 /*search_cwd*/);
10540 /* This function is mapped across the sections and remembers the offset and
10541 size of each of the DWO debugging sections we are interested in. */
10544 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
10546 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
10547 const struct dwop_section_names
*names
= &dwop_section_names
;
10549 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10551 dwo_sections
->abbrev
.s
.section
= sectp
;
10552 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
10554 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
10556 dwo_sections
->info
.s
.section
= sectp
;
10557 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
10559 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10561 dwo_sections
->line
.s
.section
= sectp
;
10562 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
10564 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10566 dwo_sections
->loc
.s
.section
= sectp
;
10567 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
10569 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10571 dwo_sections
->macinfo
.s
.section
= sectp
;
10572 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
10574 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10576 dwo_sections
->macro
.s
.section
= sectp
;
10577 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
10579 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
10581 dwo_sections
->str
.s
.section
= sectp
;
10582 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
10584 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10586 dwo_sections
->str_offsets
.s
.section
= sectp
;
10587 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
10589 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
10591 struct dwarf2_section_info type_section
;
10593 memset (&type_section
, 0, sizeof (type_section
));
10594 type_section
.s
.section
= sectp
;
10595 type_section
.size
= bfd_get_section_size (sectp
);
10596 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
10601 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
10602 by PER_CU. This is for the non-DWP case.
10603 The result is NULL if DWO_NAME can't be found. */
10605 static struct dwo_file
*
10606 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
10607 const char *dwo_name
, const char *comp_dir
)
10609 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10610 struct dwo_file
*dwo_file
;
10611 struct cleanup
*cleanups
;
10613 gdb_bfd_ref_ptr
dbfd (open_dwo_file (dwo_name
, comp_dir
));
10616 if (dwarf_read_debug
)
10617 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
10620 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10621 dwo_file
->dwo_name
= dwo_name
;
10622 dwo_file
->comp_dir
= comp_dir
;
10623 dwo_file
->dbfd
= dbfd
.release ();
10625 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwo_file
);
10627 bfd_map_over_sections (dwo_file
->dbfd
, dwarf2_locate_dwo_sections
,
10628 &dwo_file
->sections
);
10630 dwo_file
->cu
= create_dwo_cu (dwo_file
);
10632 dwo_file
->tus
= create_debug_types_hash_table (dwo_file
,
10633 dwo_file
->sections
.types
);
10635 discard_cleanups (cleanups
);
10637 if (dwarf_read_debug
)
10638 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
10643 /* This function is mapped across the sections and remembers the offset and
10644 size of each of the DWP debugging sections common to version 1 and 2 that
10645 we are interested in. */
10648 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
10649 void *dwp_file_ptr
)
10651 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
10652 const struct dwop_section_names
*names
= &dwop_section_names
;
10653 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
10655 /* Record the ELF section number for later lookup: this is what the
10656 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10657 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
10658 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
10660 /* Look for specific sections that we need. */
10661 if (section_is_p (sectp
->name
, &names
->str_dwo
))
10663 dwp_file
->sections
.str
.s
.section
= sectp
;
10664 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
10666 else if (section_is_p (sectp
->name
, &names
->cu_index
))
10668 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
10669 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
10671 else if (section_is_p (sectp
->name
, &names
->tu_index
))
10673 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
10674 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
10678 /* This function is mapped across the sections and remembers the offset and
10679 size of each of the DWP version 2 debugging sections that we are interested
10680 in. This is split into a separate function because we don't know if we
10681 have version 1 or 2 until we parse the cu_index/tu_index sections. */
10684 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
10686 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
10687 const struct dwop_section_names
*names
= &dwop_section_names
;
10688 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
10690 /* Record the ELF section number for later lookup: this is what the
10691 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10692 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
10693 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
10695 /* Look for specific sections that we need. */
10696 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10698 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
10699 dwp_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
10701 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
10703 dwp_file
->sections
.info
.s
.section
= sectp
;
10704 dwp_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
10706 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10708 dwp_file
->sections
.line
.s
.section
= sectp
;
10709 dwp_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
10711 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10713 dwp_file
->sections
.loc
.s
.section
= sectp
;
10714 dwp_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
10716 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10718 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
10719 dwp_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
10721 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10723 dwp_file
->sections
.macro
.s
.section
= sectp
;
10724 dwp_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
10726 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10728 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
10729 dwp_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
10731 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
10733 dwp_file
->sections
.types
.s
.section
= sectp
;
10734 dwp_file
->sections
.types
.size
= bfd_get_section_size (sectp
);
10738 /* Hash function for dwp_file loaded CUs/TUs. */
10741 hash_dwp_loaded_cutus (const void *item
)
10743 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
10745 /* This drops the top 32 bits of the signature, but is ok for a hash. */
10746 return dwo_unit
->signature
;
10749 /* Equality function for dwp_file loaded CUs/TUs. */
10752 eq_dwp_loaded_cutus (const void *a
, const void *b
)
10754 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
10755 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
10757 return dua
->signature
== dub
->signature
;
10760 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
10763 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
10765 return htab_create_alloc_ex (3,
10766 hash_dwp_loaded_cutus
,
10767 eq_dwp_loaded_cutus
,
10769 &objfile
->objfile_obstack
,
10770 hashtab_obstack_allocate
,
10771 dummy_obstack_deallocate
);
10774 /* Try to open DWP file FILE_NAME.
10775 The result is the bfd handle of the file.
10776 If there is a problem finding or opening the file, return NULL.
10777 Upon success, the canonicalized path of the file is stored in the bfd,
10778 same as symfile_bfd_open. */
10780 static gdb_bfd_ref_ptr
10781 open_dwp_file (const char *file_name
)
10783 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (file_name
, 1 /*is_dwp*/,
10784 1 /*search_cwd*/));
10788 /* Work around upstream bug 15652.
10789 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
10790 [Whether that's a "bug" is debatable, but it is getting in our way.]
10791 We have no real idea where the dwp file is, because gdb's realpath-ing
10792 of the executable's path may have discarded the needed info.
10793 [IWBN if the dwp file name was recorded in the executable, akin to
10794 .gnu_debuglink, but that doesn't exist yet.]
10795 Strip the directory from FILE_NAME and search again. */
10796 if (*debug_file_directory
!= '\0')
10798 /* Don't implicitly search the current directory here.
10799 If the user wants to search "." to handle this case,
10800 it must be added to debug-file-directory. */
10801 return try_open_dwop_file (lbasename (file_name
), 1 /*is_dwp*/,
10808 /* Initialize the use of the DWP file for the current objfile.
10809 By convention the name of the DWP file is ${objfile}.dwp.
10810 The result is NULL if it can't be found. */
10812 static struct dwp_file
*
10813 open_and_init_dwp_file (void)
10815 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10816 struct dwp_file
*dwp_file
;
10818 struct cleanup
*cleanups
= make_cleanup (null_cleanup
, 0);
10820 /* Try to find first .dwp for the binary file before any symbolic links
10823 /* If the objfile is a debug file, find the name of the real binary
10824 file and get the name of dwp file from there. */
10825 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
10827 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
10828 const char *backlink_basename
= lbasename (backlink
->original_name
);
10829 char *debug_dirname
= ldirname (objfile
->original_name
);
10831 make_cleanup (xfree
, debug_dirname
);
10832 dwp_name
= xstrprintf ("%s%s%s.dwp", debug_dirname
,
10833 SLASH_STRING
, backlink_basename
);
10836 dwp_name
= xstrprintf ("%s.dwp", objfile
->original_name
);
10837 make_cleanup (xfree
, dwp_name
);
10839 gdb_bfd_ref_ptr
dbfd (open_dwp_file (dwp_name
));
10841 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
10843 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
10844 dwp_name
= xstrprintf ("%s.dwp", objfile_name (objfile
));
10845 make_cleanup (xfree
, dwp_name
);
10846 dbfd
= open_dwp_file (dwp_name
);
10851 if (dwarf_read_debug
)
10852 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
);
10853 do_cleanups (cleanups
);
10856 dwp_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_file
);
10857 dwp_file
->name
= bfd_get_filename (dbfd
.get ());
10858 dwp_file
->dbfd
= dbfd
.release ();
10859 do_cleanups (cleanups
);
10861 /* +1: section 0 is unused */
10862 dwp_file
->num_sections
= bfd_count_sections (dwp_file
->dbfd
) + 1;
10863 dwp_file
->elf_sections
=
10864 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
10865 dwp_file
->num_sections
, asection
*);
10867 bfd_map_over_sections (dwp_file
->dbfd
, dwarf2_locate_common_dwp_sections
,
10870 dwp_file
->cus
= create_dwp_hash_table (dwp_file
, 0);
10872 dwp_file
->tus
= create_dwp_hash_table (dwp_file
, 1);
10874 /* The DWP file version is stored in the hash table. Oh well. */
10875 if (dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
10877 /* Technically speaking, we should try to limp along, but this is
10878 pretty bizarre. We use pulongest here because that's the established
10879 portability solution (e.g, we cannot use %u for uint32_t). */
10880 error (_("Dwarf Error: DWP file CU version %s doesn't match"
10881 " TU version %s [in DWP file %s]"),
10882 pulongest (dwp_file
->cus
->version
),
10883 pulongest (dwp_file
->tus
->version
), dwp_name
);
10885 dwp_file
->version
= dwp_file
->cus
->version
;
10887 if (dwp_file
->version
== 2)
10888 bfd_map_over_sections (dwp_file
->dbfd
, dwarf2_locate_v2_dwp_sections
,
10891 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
10892 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
10894 if (dwarf_read_debug
)
10896 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
10897 fprintf_unfiltered (gdb_stdlog
,
10898 " %s CUs, %s TUs\n",
10899 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
10900 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
10906 /* Wrapper around open_and_init_dwp_file, only open it once. */
10908 static struct dwp_file
*
10909 get_dwp_file (void)
10911 if (! dwarf2_per_objfile
->dwp_checked
)
10913 dwarf2_per_objfile
->dwp_file
= open_and_init_dwp_file ();
10914 dwarf2_per_objfile
->dwp_checked
= 1;
10916 return dwarf2_per_objfile
->dwp_file
;
10919 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
10920 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
10921 or in the DWP file for the objfile, referenced by THIS_UNIT.
10922 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
10923 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
10925 This is called, for example, when wanting to read a variable with a
10926 complex location. Therefore we don't want to do file i/o for every call.
10927 Therefore we don't want to look for a DWO file on every call.
10928 Therefore we first see if we've already seen SIGNATURE in a DWP file,
10929 then we check if we've already seen DWO_NAME, and only THEN do we check
10932 The result is a pointer to the dwo_unit object or NULL if we didn't find it
10933 (dwo_id mismatch or couldn't find the DWO/DWP file). */
10935 static struct dwo_unit
*
10936 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
10937 const char *dwo_name
, const char *comp_dir
,
10938 ULONGEST signature
, int is_debug_types
)
10940 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10941 const char *kind
= is_debug_types
? "TU" : "CU";
10942 void **dwo_file_slot
;
10943 struct dwo_file
*dwo_file
;
10944 struct dwp_file
*dwp_file
;
10946 /* First see if there's a DWP file.
10947 If we have a DWP file but didn't find the DWO inside it, don't
10948 look for the original DWO file. It makes gdb behave differently
10949 depending on whether one is debugging in the build tree. */
10951 dwp_file
= get_dwp_file ();
10952 if (dwp_file
!= NULL
)
10954 const struct dwp_hash_table
*dwp_htab
=
10955 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10957 if (dwp_htab
!= NULL
)
10959 struct dwo_unit
*dwo_cutu
=
10960 lookup_dwo_unit_in_dwp (dwp_file
, comp_dir
,
10961 signature
, is_debug_types
);
10963 if (dwo_cutu
!= NULL
)
10965 if (dwarf_read_debug
)
10967 fprintf_unfiltered (gdb_stdlog
,
10968 "Virtual DWO %s %s found: @%s\n",
10969 kind
, hex_string (signature
),
10970 host_address_to_string (dwo_cutu
));
10978 /* No DWP file, look for the DWO file. */
10980 dwo_file_slot
= lookup_dwo_file_slot (dwo_name
, comp_dir
);
10981 if (*dwo_file_slot
== NULL
)
10983 /* Read in the file and build a table of the CUs/TUs it contains. */
10984 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
10986 /* NOTE: This will be NULL if unable to open the file. */
10987 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
10989 if (dwo_file
!= NULL
)
10991 struct dwo_unit
*dwo_cutu
= NULL
;
10993 if (is_debug_types
&& dwo_file
->tus
)
10995 struct dwo_unit find_dwo_cutu
;
10997 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
10998 find_dwo_cutu
.signature
= signature
;
11000 = (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_cutu
);
11002 else if (!is_debug_types
&& dwo_file
->cu
)
11004 if (signature
== dwo_file
->cu
->signature
)
11005 dwo_cutu
= dwo_file
->cu
;
11008 if (dwo_cutu
!= NULL
)
11010 if (dwarf_read_debug
)
11012 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
11013 kind
, dwo_name
, hex_string (signature
),
11014 host_address_to_string (dwo_cutu
));
11021 /* We didn't find it. This could mean a dwo_id mismatch, or
11022 someone deleted the DWO/DWP file, or the search path isn't set up
11023 correctly to find the file. */
11025 if (dwarf_read_debug
)
11027 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
11028 kind
, dwo_name
, hex_string (signature
));
11031 /* This is a warning and not a complaint because it can be caused by
11032 pilot error (e.g., user accidentally deleting the DWO). */
11034 /* Print the name of the DWP file if we looked there, helps the user
11035 better diagnose the problem. */
11036 char *dwp_text
= NULL
;
11037 struct cleanup
*cleanups
;
11039 if (dwp_file
!= NULL
)
11040 dwp_text
= xstrprintf (" [in DWP file %s]", lbasename (dwp_file
->name
));
11041 cleanups
= make_cleanup (xfree
, dwp_text
);
11043 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x"
11044 " [in module %s]"),
11045 kind
, dwo_name
, hex_string (signature
),
11046 dwp_text
!= NULL
? dwp_text
: "",
11047 this_unit
->is_debug_types
? "TU" : "CU",
11048 this_unit
->offset
.sect_off
, objfile_name (objfile
));
11050 do_cleanups (cleanups
);
11055 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
11056 See lookup_dwo_cutu_unit for details. */
11058 static struct dwo_unit
*
11059 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
11060 const char *dwo_name
, const char *comp_dir
,
11061 ULONGEST signature
)
11063 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
11066 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
11067 See lookup_dwo_cutu_unit for details. */
11069 static struct dwo_unit
*
11070 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
11071 const char *dwo_name
, const char *comp_dir
)
11073 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
11076 /* Traversal function for queue_and_load_all_dwo_tus. */
11079 queue_and_load_dwo_tu (void **slot
, void *info
)
11081 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
11082 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
11083 ULONGEST signature
= dwo_unit
->signature
;
11084 struct signatured_type
*sig_type
=
11085 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
11087 if (sig_type
!= NULL
)
11089 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
11091 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
11092 a real dependency of PER_CU on SIG_TYPE. That is detected later
11093 while processing PER_CU. */
11094 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
11095 load_full_type_unit (sig_cu
);
11096 VEC_safe_push (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, sig_cu
);
11102 /* Queue all TUs contained in the DWO of PER_CU to be read in.
11103 The DWO may have the only definition of the type, though it may not be
11104 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
11105 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
11108 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
11110 struct dwo_unit
*dwo_unit
;
11111 struct dwo_file
*dwo_file
;
11113 gdb_assert (!per_cu
->is_debug_types
);
11114 gdb_assert (get_dwp_file () == NULL
);
11115 gdb_assert (per_cu
->cu
!= NULL
);
11117 dwo_unit
= per_cu
->cu
->dwo_unit
;
11118 gdb_assert (dwo_unit
!= NULL
);
11120 dwo_file
= dwo_unit
->dwo_file
;
11121 if (dwo_file
->tus
!= NULL
)
11122 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
11125 /* Free all resources associated with DWO_FILE.
11126 Close the DWO file and munmap the sections.
11127 All memory should be on the objfile obstack. */
11130 free_dwo_file (struct dwo_file
*dwo_file
, struct objfile
*objfile
)
11133 /* Note: dbfd is NULL for virtual DWO files. */
11134 gdb_bfd_unref (dwo_file
->dbfd
);
11136 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
11139 /* Wrapper for free_dwo_file for use in cleanups. */
11142 free_dwo_file_cleanup (void *arg
)
11144 struct dwo_file
*dwo_file
= (struct dwo_file
*) arg
;
11145 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11147 free_dwo_file (dwo_file
, objfile
);
11150 /* Traversal function for free_dwo_files. */
11153 free_dwo_file_from_slot (void **slot
, void *info
)
11155 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
11156 struct objfile
*objfile
= (struct objfile
*) info
;
11158 free_dwo_file (dwo_file
, objfile
);
11163 /* Free all resources associated with DWO_FILES. */
11166 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
11168 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
11171 /* Read in various DIEs. */
11173 /* qsort helper for inherit_abstract_dies. */
11176 unsigned_int_compar (const void *ap
, const void *bp
)
11178 unsigned int a
= *(unsigned int *) ap
;
11179 unsigned int b
= *(unsigned int *) bp
;
11181 return (a
> b
) - (b
> a
);
11184 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
11185 Inherit only the children of the DW_AT_abstract_origin DIE not being
11186 already referenced by DW_AT_abstract_origin from the children of the
11190 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
11192 struct die_info
*child_die
;
11193 unsigned die_children_count
;
11194 /* CU offsets which were referenced by children of the current DIE. */
11195 sect_offset
*offsets
;
11196 sect_offset
*offsets_end
, *offsetp
;
11197 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
11198 struct die_info
*origin_die
;
11199 /* Iterator of the ORIGIN_DIE children. */
11200 struct die_info
*origin_child_die
;
11201 struct cleanup
*cleanups
;
11202 struct attribute
*attr
;
11203 struct dwarf2_cu
*origin_cu
;
11204 struct pending
**origin_previous_list_in_scope
;
11206 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
11210 /* Note that following die references may follow to a die in a
11214 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
11216 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
11218 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
11219 origin_cu
->list_in_scope
= cu
->list_in_scope
;
11221 if (die
->tag
!= origin_die
->tag
11222 && !(die
->tag
== DW_TAG_inlined_subroutine
11223 && origin_die
->tag
== DW_TAG_subprogram
))
11224 complaint (&symfile_complaints
,
11225 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
11226 die
->offset
.sect_off
, origin_die
->offset
.sect_off
);
11228 child_die
= die
->child
;
11229 die_children_count
= 0;
11230 while (child_die
&& child_die
->tag
)
11232 child_die
= sibling_die (child_die
);
11233 die_children_count
++;
11235 offsets
= XNEWVEC (sect_offset
, die_children_count
);
11236 cleanups
= make_cleanup (xfree
, offsets
);
11238 offsets_end
= offsets
;
11239 for (child_die
= die
->child
;
11240 child_die
&& child_die
->tag
;
11241 child_die
= sibling_die (child_die
))
11243 struct die_info
*child_origin_die
;
11244 struct dwarf2_cu
*child_origin_cu
;
11246 /* We are trying to process concrete instance entries:
11247 DW_TAG_GNU_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
11248 it's not relevant to our analysis here. i.e. detecting DIEs that are
11249 present in the abstract instance but not referenced in the concrete
11251 if (child_die
->tag
== DW_TAG_GNU_call_site
)
11254 /* For each CHILD_DIE, find the corresponding child of
11255 ORIGIN_DIE. If there is more than one layer of
11256 DW_AT_abstract_origin, follow them all; there shouldn't be,
11257 but GCC versions at least through 4.4 generate this (GCC PR
11259 child_origin_die
= child_die
;
11260 child_origin_cu
= cu
;
11263 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
11267 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
11271 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
11272 counterpart may exist. */
11273 if (child_origin_die
!= child_die
)
11275 if (child_die
->tag
!= child_origin_die
->tag
11276 && !(child_die
->tag
== DW_TAG_inlined_subroutine
11277 && child_origin_die
->tag
== DW_TAG_subprogram
))
11278 complaint (&symfile_complaints
,
11279 _("Child DIE 0x%x and its abstract origin 0x%x have "
11280 "different tags"), child_die
->offset
.sect_off
,
11281 child_origin_die
->offset
.sect_off
);
11282 if (child_origin_die
->parent
!= origin_die
)
11283 complaint (&symfile_complaints
,
11284 _("Child DIE 0x%x and its abstract origin 0x%x have "
11285 "different parents"), child_die
->offset
.sect_off
,
11286 child_origin_die
->offset
.sect_off
);
11288 *offsets_end
++ = child_origin_die
->offset
;
11291 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
11292 unsigned_int_compar
);
11293 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
11294 if (offsetp
[-1].sect_off
== offsetp
->sect_off
)
11295 complaint (&symfile_complaints
,
11296 _("Multiple children of DIE 0x%x refer "
11297 "to DIE 0x%x as their abstract origin"),
11298 die
->offset
.sect_off
, offsetp
->sect_off
);
11301 origin_child_die
= origin_die
->child
;
11302 while (origin_child_die
&& origin_child_die
->tag
)
11304 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
11305 while (offsetp
< offsets_end
11306 && offsetp
->sect_off
< origin_child_die
->offset
.sect_off
)
11308 if (offsetp
>= offsets_end
11309 || offsetp
->sect_off
> origin_child_die
->offset
.sect_off
)
11311 /* Found that ORIGIN_CHILD_DIE is really not referenced.
11312 Check whether we're already processing ORIGIN_CHILD_DIE.
11313 This can happen with mutually referenced abstract_origins.
11315 if (!origin_child_die
->in_process
)
11316 process_die (origin_child_die
, origin_cu
);
11318 origin_child_die
= sibling_die (origin_child_die
);
11320 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
11322 do_cleanups (cleanups
);
11326 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11328 struct objfile
*objfile
= cu
->objfile
;
11329 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11330 struct context_stack
*newobj
;
11333 struct die_info
*child_die
;
11334 struct attribute
*attr
, *call_line
, *call_file
;
11336 CORE_ADDR baseaddr
;
11337 struct block
*block
;
11338 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
11339 VEC (symbolp
) *template_args
= NULL
;
11340 struct template_symbol
*templ_func
= NULL
;
11344 /* If we do not have call site information, we can't show the
11345 caller of this inlined function. That's too confusing, so
11346 only use the scope for local variables. */
11347 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
11348 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
11349 if (call_line
== NULL
|| call_file
== NULL
)
11351 read_lexical_block_scope (die
, cu
);
11356 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11358 name
= dwarf2_name (die
, cu
);
11360 /* Ignore functions with missing or empty names. These are actually
11361 illegal according to the DWARF standard. */
11364 complaint (&symfile_complaints
,
11365 _("missing name for subprogram DIE at %d"),
11366 die
->offset
.sect_off
);
11370 /* Ignore functions with missing or invalid low and high pc attributes. */
11371 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
11372 <= PC_BOUNDS_INVALID
)
11374 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
11375 if (!attr
|| !DW_UNSND (attr
))
11376 complaint (&symfile_complaints
,
11377 _("cannot get low and high bounds "
11378 "for subprogram DIE at %d"),
11379 die
->offset
.sect_off
);
11383 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11384 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
11386 /* If we have any template arguments, then we must allocate a
11387 different sort of symbol. */
11388 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
11390 if (child_die
->tag
== DW_TAG_template_type_param
11391 || child_die
->tag
== DW_TAG_template_value_param
)
11393 templ_func
= allocate_template_symbol (objfile
);
11394 templ_func
->base
.is_cplus_template_function
= 1;
11399 newobj
= push_context (0, lowpc
);
11400 newobj
->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
11401 (struct symbol
*) templ_func
);
11403 /* If there is a location expression for DW_AT_frame_base, record
11405 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
11407 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
11409 /* If there is a location for the static link, record it. */
11410 newobj
->static_link
= NULL
;
11411 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
11414 newobj
->static_link
11415 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
11416 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
);
11419 cu
->list_in_scope
= &local_symbols
;
11421 if (die
->child
!= NULL
)
11423 child_die
= die
->child
;
11424 while (child_die
&& child_die
->tag
)
11426 if (child_die
->tag
== DW_TAG_template_type_param
11427 || child_die
->tag
== DW_TAG_template_value_param
)
11429 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
11432 VEC_safe_push (symbolp
, template_args
, arg
);
11435 process_die (child_die
, cu
);
11436 child_die
= sibling_die (child_die
);
11440 inherit_abstract_dies (die
, cu
);
11442 /* If we have a DW_AT_specification, we might need to import using
11443 directives from the context of the specification DIE. See the
11444 comment in determine_prefix. */
11445 if (cu
->language
== language_cplus
11446 && dwarf2_attr (die
, DW_AT_specification
, cu
))
11448 struct dwarf2_cu
*spec_cu
= cu
;
11449 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
11453 child_die
= spec_die
->child
;
11454 while (child_die
&& child_die
->tag
)
11456 if (child_die
->tag
== DW_TAG_imported_module
)
11457 process_die (child_die
, spec_cu
);
11458 child_die
= sibling_die (child_die
);
11461 /* In some cases, GCC generates specification DIEs that
11462 themselves contain DW_AT_specification attributes. */
11463 spec_die
= die_specification (spec_die
, &spec_cu
);
11467 newobj
= pop_context ();
11468 /* Make a block for the local symbols within. */
11469 block
= finish_block (newobj
->name
, &local_symbols
, newobj
->old_blocks
,
11470 newobj
->static_link
, lowpc
, highpc
);
11472 /* For C++, set the block's scope. */
11473 if ((cu
->language
== language_cplus
11474 || cu
->language
== language_fortran
11475 || cu
->language
== language_d
11476 || cu
->language
== language_rust
)
11477 && cu
->processing_has_namespace_info
)
11478 block_set_scope (block
, determine_prefix (die
, cu
),
11479 &objfile
->objfile_obstack
);
11481 /* If we have address ranges, record them. */
11482 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11484 gdbarch_make_symbol_special (gdbarch
, newobj
->name
, objfile
);
11486 /* Attach template arguments to function. */
11487 if (! VEC_empty (symbolp
, template_args
))
11489 gdb_assert (templ_func
!= NULL
);
11491 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
11492 templ_func
->template_arguments
11493 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
11494 templ_func
->n_template_arguments
);
11495 memcpy (templ_func
->template_arguments
,
11496 VEC_address (symbolp
, template_args
),
11497 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
11498 VEC_free (symbolp
, template_args
);
11501 /* In C++, we can have functions nested inside functions (e.g., when
11502 a function declares a class that has methods). This means that
11503 when we finish processing a function scope, we may need to go
11504 back to building a containing block's symbol lists. */
11505 local_symbols
= newobj
->locals
;
11506 local_using_directives
= newobj
->local_using_directives
;
11508 /* If we've finished processing a top-level function, subsequent
11509 symbols go in the file symbol list. */
11510 if (outermost_context_p ())
11511 cu
->list_in_scope
= &file_symbols
;
11514 /* Process all the DIES contained within a lexical block scope. Start
11515 a new scope, process the dies, and then close the scope. */
11518 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11520 struct objfile
*objfile
= cu
->objfile
;
11521 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11522 struct context_stack
*newobj
;
11523 CORE_ADDR lowpc
, highpc
;
11524 struct die_info
*child_die
;
11525 CORE_ADDR baseaddr
;
11527 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11529 /* Ignore blocks with missing or invalid low and high pc attributes. */
11530 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
11531 as multiple lexical blocks? Handling children in a sane way would
11532 be nasty. Might be easier to properly extend generic blocks to
11533 describe ranges. */
11534 switch (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
11536 case PC_BOUNDS_NOT_PRESENT
:
11537 /* DW_TAG_lexical_block has no attributes, process its children as if
11538 there was no wrapping by that DW_TAG_lexical_block.
11539 GCC does no longer produces such DWARF since GCC r224161. */
11540 for (child_die
= die
->child
;
11541 child_die
!= NULL
&& child_die
->tag
;
11542 child_die
= sibling_die (child_die
))
11543 process_die (child_die
, cu
);
11545 case PC_BOUNDS_INVALID
:
11548 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11549 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
11551 push_context (0, lowpc
);
11552 if (die
->child
!= NULL
)
11554 child_die
= die
->child
;
11555 while (child_die
&& child_die
->tag
)
11557 process_die (child_die
, cu
);
11558 child_die
= sibling_die (child_die
);
11561 inherit_abstract_dies (die
, cu
);
11562 newobj
= pop_context ();
11564 if (local_symbols
!= NULL
|| local_using_directives
!= NULL
)
11566 struct block
*block
11567 = finish_block (0, &local_symbols
, newobj
->old_blocks
, NULL
,
11568 newobj
->start_addr
, highpc
);
11570 /* Note that recording ranges after traversing children, as we
11571 do here, means that recording a parent's ranges entails
11572 walking across all its children's ranges as they appear in
11573 the address map, which is quadratic behavior.
11575 It would be nicer to record the parent's ranges before
11576 traversing its children, simply overriding whatever you find
11577 there. But since we don't even decide whether to create a
11578 block until after we've traversed its children, that's hard
11580 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11582 local_symbols
= newobj
->locals
;
11583 local_using_directives
= newobj
->local_using_directives
;
11586 /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */
11589 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11591 struct objfile
*objfile
= cu
->objfile
;
11592 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11593 CORE_ADDR pc
, baseaddr
;
11594 struct attribute
*attr
;
11595 struct call_site
*call_site
, call_site_local
;
11598 struct die_info
*child_die
;
11600 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11602 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
11605 complaint (&symfile_complaints
,
11606 _("missing DW_AT_low_pc for DW_TAG_GNU_call_site "
11607 "DIE 0x%x [in module %s]"),
11608 die
->offset
.sect_off
, objfile_name (objfile
));
11611 pc
= attr_value_as_address (attr
) + baseaddr
;
11612 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
11614 if (cu
->call_site_htab
== NULL
)
11615 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
11616 NULL
, &objfile
->objfile_obstack
,
11617 hashtab_obstack_allocate
, NULL
);
11618 call_site_local
.pc
= pc
;
11619 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
11622 complaint (&symfile_complaints
,
11623 _("Duplicate PC %s for DW_TAG_GNU_call_site "
11624 "DIE 0x%x [in module %s]"),
11625 paddress (gdbarch
, pc
), die
->offset
.sect_off
,
11626 objfile_name (objfile
));
11630 /* Count parameters at the caller. */
11633 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
11634 child_die
= sibling_die (child_die
))
11636 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11638 complaint (&symfile_complaints
,
11639 _("Tag %d is not DW_TAG_GNU_call_site_parameter in "
11640 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11641 child_die
->tag
, child_die
->offset
.sect_off
,
11642 objfile_name (objfile
));
11650 = ((struct call_site
*)
11651 obstack_alloc (&objfile
->objfile_obstack
,
11652 sizeof (*call_site
)
11653 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
11655 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
11656 call_site
->pc
= pc
;
11658 if (dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
11660 struct die_info
*func_die
;
11662 /* Skip also over DW_TAG_inlined_subroutine. */
11663 for (func_die
= die
->parent
;
11664 func_die
&& func_die
->tag
!= DW_TAG_subprogram
11665 && func_die
->tag
!= DW_TAG_subroutine_type
;
11666 func_die
= func_die
->parent
);
11668 /* DW_AT_GNU_all_call_sites is a superset
11669 of DW_AT_GNU_all_tail_call_sites. */
11671 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
11672 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
11674 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
11675 not complete. But keep CALL_SITE for look ups via call_site_htab,
11676 both the initial caller containing the real return address PC and
11677 the final callee containing the current PC of a chain of tail
11678 calls do not need to have the tail call list complete. But any
11679 function candidate for a virtual tail call frame searched via
11680 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
11681 determined unambiguously. */
11685 struct type
*func_type
= NULL
;
11688 func_type
= get_die_type (func_die
, cu
);
11689 if (func_type
!= NULL
)
11691 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
11693 /* Enlist this call site to the function. */
11694 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
11695 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
11698 complaint (&symfile_complaints
,
11699 _("Cannot find function owning DW_TAG_GNU_call_site "
11700 "DIE 0x%x [in module %s]"),
11701 die
->offset
.sect_off
, objfile_name (objfile
));
11705 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
11707 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
11708 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
11709 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
11710 /* Keep NULL DWARF_BLOCK. */;
11711 else if (attr_form_is_block (attr
))
11713 struct dwarf2_locexpr_baton
*dlbaton
;
11715 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
11716 dlbaton
->data
= DW_BLOCK (attr
)->data
;
11717 dlbaton
->size
= DW_BLOCK (attr
)->size
;
11718 dlbaton
->per_cu
= cu
->per_cu
;
11720 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
11722 else if (attr_form_is_ref (attr
))
11724 struct dwarf2_cu
*target_cu
= cu
;
11725 struct die_info
*target_die
;
11727 target_die
= follow_die_ref (die
, attr
, &target_cu
);
11728 gdb_assert (target_cu
->objfile
== objfile
);
11729 if (die_is_declaration (target_die
, target_cu
))
11731 const char *target_physname
;
11733 /* Prefer the mangled name; otherwise compute the demangled one. */
11734 target_physname
= dwarf2_string_attr (target_die
,
11735 DW_AT_linkage_name
,
11737 if (target_physname
== NULL
)
11738 target_physname
= dwarf2_string_attr (target_die
,
11739 DW_AT_MIPS_linkage_name
,
11741 if (target_physname
== NULL
)
11742 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
11743 if (target_physname
== NULL
)
11744 complaint (&symfile_complaints
,
11745 _("DW_AT_GNU_call_site_target target DIE has invalid "
11746 "physname, for referencing DIE 0x%x [in module %s]"),
11747 die
->offset
.sect_off
, objfile_name (objfile
));
11749 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
11755 /* DW_AT_entry_pc should be preferred. */
11756 if (dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
)
11757 <= PC_BOUNDS_INVALID
)
11758 complaint (&symfile_complaints
,
11759 _("DW_AT_GNU_call_site_target target DIE has invalid "
11760 "low pc, for referencing DIE 0x%x [in module %s]"),
11761 die
->offset
.sect_off
, objfile_name (objfile
));
11764 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11765 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
11770 complaint (&symfile_complaints
,
11771 _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither "
11772 "block nor reference, for DIE 0x%x [in module %s]"),
11773 die
->offset
.sect_off
, objfile_name (objfile
));
11775 call_site
->per_cu
= cu
->per_cu
;
11777 for (child_die
= die
->child
;
11778 child_die
&& child_die
->tag
;
11779 child_die
= sibling_die (child_die
))
11781 struct call_site_parameter
*parameter
;
11782 struct attribute
*loc
, *origin
;
11784 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11786 /* Already printed the complaint above. */
11790 gdb_assert (call_site
->parameter_count
< nparams
);
11791 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
11793 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
11794 specifies DW_TAG_formal_parameter. Value of the data assumed for the
11795 register is contained in DW_AT_GNU_call_site_value. */
11797 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
11798 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
11799 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
11801 sect_offset offset
;
11803 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
11804 offset
= dwarf2_get_ref_die_offset (origin
);
11805 if (!offset_in_cu_p (&cu
->header
, offset
))
11807 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
11808 binding can be done only inside one CU. Such referenced DIE
11809 therefore cannot be even moved to DW_TAG_partial_unit. */
11810 complaint (&symfile_complaints
,
11811 _("DW_AT_abstract_origin offset is not in CU for "
11812 "DW_TAG_GNU_call_site child DIE 0x%x "
11814 child_die
->offset
.sect_off
, objfile_name (objfile
));
11817 parameter
->u
.param_offset
.cu_off
= (offset
.sect_off
11818 - cu
->header
.offset
.sect_off
);
11820 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
11822 complaint (&symfile_complaints
,
11823 _("No DW_FORM_block* DW_AT_location for "
11824 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11825 child_die
->offset
.sect_off
, objfile_name (objfile
));
11830 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
11831 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
11832 if (parameter
->u
.dwarf_reg
!= -1)
11833 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
11834 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
11835 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
11836 ¶meter
->u
.fb_offset
))
11837 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
11840 complaint (&symfile_complaints
,
11841 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
11842 "for DW_FORM_block* DW_AT_location is supported for "
11843 "DW_TAG_GNU_call_site child DIE 0x%x "
11845 child_die
->offset
.sect_off
, objfile_name (objfile
));
11850 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
11851 if (!attr_form_is_block (attr
))
11853 complaint (&symfile_complaints
,
11854 _("No DW_FORM_block* DW_AT_GNU_call_site_value for "
11855 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11856 child_die
->offset
.sect_off
, objfile_name (objfile
));
11859 parameter
->value
= DW_BLOCK (attr
)->data
;
11860 parameter
->value_size
= DW_BLOCK (attr
)->size
;
11862 /* Parameters are not pre-cleared by memset above. */
11863 parameter
->data_value
= NULL
;
11864 parameter
->data_value_size
= 0;
11865 call_site
->parameter_count
++;
11867 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
11870 if (!attr_form_is_block (attr
))
11871 complaint (&symfile_complaints
,
11872 _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for "
11873 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11874 child_die
->offset
.sect_off
, objfile_name (objfile
));
11877 parameter
->data_value
= DW_BLOCK (attr
)->data
;
11878 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
11884 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
11885 Return 1 if the attributes are present and valid, otherwise, return 0.
11886 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
11889 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
11890 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
11891 struct partial_symtab
*ranges_pst
)
11893 struct objfile
*objfile
= cu
->objfile
;
11894 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11895 struct comp_unit_head
*cu_header
= &cu
->header
;
11896 bfd
*obfd
= objfile
->obfd
;
11897 unsigned int addr_size
= cu_header
->addr_size
;
11898 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
11899 /* Base address selection entry. */
11902 unsigned int dummy
;
11903 const gdb_byte
*buffer
;
11906 CORE_ADDR high
= 0;
11907 CORE_ADDR baseaddr
;
11909 found_base
= cu
->base_known
;
11910 base
= cu
->base_address
;
11912 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
11913 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
11915 complaint (&symfile_complaints
,
11916 _("Offset %d out of bounds for DW_AT_ranges attribute"),
11920 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
11924 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11928 CORE_ADDR range_beginning
, range_end
;
11930 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
11931 buffer
+= addr_size
;
11932 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
11933 buffer
+= addr_size
;
11934 offset
+= 2 * addr_size
;
11936 /* An end of list marker is a pair of zero addresses. */
11937 if (range_beginning
== 0 && range_end
== 0)
11938 /* Found the end of list entry. */
11941 /* Each base address selection entry is a pair of 2 values.
11942 The first is the largest possible address, the second is
11943 the base address. Check for a base address here. */
11944 if ((range_beginning
& mask
) == mask
)
11946 /* If we found the largest possible address, then we already
11947 have the base address in range_end. */
11955 /* We have no valid base address for the ranges
11957 complaint (&symfile_complaints
,
11958 _("Invalid .debug_ranges data (no base address)"));
11962 if (range_beginning
> range_end
)
11964 /* Inverted range entries are invalid. */
11965 complaint (&symfile_complaints
,
11966 _("Invalid .debug_ranges data (inverted range)"));
11970 /* Empty range entries have no effect. */
11971 if (range_beginning
== range_end
)
11974 range_beginning
+= base
;
11977 /* A not-uncommon case of bad debug info.
11978 Don't pollute the addrmap with bad data. */
11979 if (range_beginning
+ baseaddr
== 0
11980 && !dwarf2_per_objfile
->has_section_at_zero
)
11982 complaint (&symfile_complaints
,
11983 _(".debug_ranges entry has start address of zero"
11984 " [in module %s]"), objfile_name (objfile
));
11988 if (ranges_pst
!= NULL
)
11993 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
11994 range_beginning
+ baseaddr
);
11995 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
11996 range_end
+ baseaddr
);
11997 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
12001 /* FIXME: This is recording everything as a low-high
12002 segment of consecutive addresses. We should have a
12003 data structure for discontiguous block ranges
12007 low
= range_beginning
;
12013 if (range_beginning
< low
)
12014 low
= range_beginning
;
12015 if (range_end
> high
)
12021 /* If the first entry is an end-of-list marker, the range
12022 describes an empty scope, i.e. no instructions. */
12028 *high_return
= high
;
12032 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
12033 definition for the return value. *LOWPC and *HIGHPC are set iff
12034 neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */
12036 static enum pc_bounds_kind
12037 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
12038 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
12039 struct partial_symtab
*pst
)
12041 struct attribute
*attr
;
12042 struct attribute
*attr_high
;
12044 CORE_ADDR high
= 0;
12045 enum pc_bounds_kind ret
;
12047 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
12050 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
12053 low
= attr_value_as_address (attr
);
12054 high
= attr_value_as_address (attr_high
);
12055 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
12059 /* Found high w/o low attribute. */
12060 return PC_BOUNDS_INVALID
;
12062 /* Found consecutive range of addresses. */
12063 ret
= PC_BOUNDS_HIGH_LOW
;
12067 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
12070 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
12071 We take advantage of the fact that DW_AT_ranges does not appear
12072 in DW_TAG_compile_unit of DWO files. */
12073 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
12074 unsigned int ranges_offset
= (DW_UNSND (attr
)
12075 + (need_ranges_base
12079 /* Value of the DW_AT_ranges attribute is the offset in the
12080 .debug_ranges section. */
12081 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
12082 return PC_BOUNDS_INVALID
;
12083 /* Found discontinuous range of addresses. */
12084 ret
= PC_BOUNDS_RANGES
;
12087 return PC_BOUNDS_NOT_PRESENT
;
12090 /* read_partial_die has also the strict LOW < HIGH requirement. */
12092 return PC_BOUNDS_INVALID
;
12094 /* When using the GNU linker, .gnu.linkonce. sections are used to
12095 eliminate duplicate copies of functions and vtables and such.
12096 The linker will arbitrarily choose one and discard the others.
12097 The AT_*_pc values for such functions refer to local labels in
12098 these sections. If the section from that file was discarded, the
12099 labels are not in the output, so the relocs get a value of 0.
12100 If this is a discarded function, mark the pc bounds as invalid,
12101 so that GDB will ignore it. */
12102 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12103 return PC_BOUNDS_INVALID
;
12111 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
12112 its low and high PC addresses. Do nothing if these addresses could not
12113 be determined. Otherwise, set LOWPC to the low address if it is smaller,
12114 and HIGHPC to the high address if greater than HIGHPC. */
12117 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
12118 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
12119 struct dwarf2_cu
*cu
)
12121 CORE_ADDR low
, high
;
12122 struct die_info
*child
= die
->child
;
12124 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
) >= PC_BOUNDS_RANGES
)
12126 *lowpc
= std::min (*lowpc
, low
);
12127 *highpc
= std::max (*highpc
, high
);
12130 /* If the language does not allow nested subprograms (either inside
12131 subprograms or lexical blocks), we're done. */
12132 if (cu
->language
!= language_ada
)
12135 /* Check all the children of the given DIE. If it contains nested
12136 subprograms, then check their pc bounds. Likewise, we need to
12137 check lexical blocks as well, as they may also contain subprogram
12139 while (child
&& child
->tag
)
12141 if (child
->tag
== DW_TAG_subprogram
12142 || child
->tag
== DW_TAG_lexical_block
)
12143 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
12144 child
= sibling_die (child
);
12148 /* Get the low and high pc's represented by the scope DIE, and store
12149 them in *LOWPC and *HIGHPC. If the correct values can't be
12150 determined, set *LOWPC to -1 and *HIGHPC to 0. */
12153 get_scope_pc_bounds (struct die_info
*die
,
12154 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
12155 struct dwarf2_cu
*cu
)
12157 CORE_ADDR best_low
= (CORE_ADDR
) -1;
12158 CORE_ADDR best_high
= (CORE_ADDR
) 0;
12159 CORE_ADDR current_low
, current_high
;
12161 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
12162 >= PC_BOUNDS_RANGES
)
12164 best_low
= current_low
;
12165 best_high
= current_high
;
12169 struct die_info
*child
= die
->child
;
12171 while (child
&& child
->tag
)
12173 switch (child
->tag
) {
12174 case DW_TAG_subprogram
:
12175 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
12177 case DW_TAG_namespace
:
12178 case DW_TAG_module
:
12179 /* FIXME: carlton/2004-01-16: Should we do this for
12180 DW_TAG_class_type/DW_TAG_structure_type, too? I think
12181 that current GCC's always emit the DIEs corresponding
12182 to definitions of methods of classes as children of a
12183 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
12184 the DIEs giving the declarations, which could be
12185 anywhere). But I don't see any reason why the
12186 standards says that they have to be there. */
12187 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
12189 if (current_low
!= ((CORE_ADDR
) -1))
12191 best_low
= std::min (best_low
, current_low
);
12192 best_high
= std::max (best_high
, current_high
);
12200 child
= sibling_die (child
);
12205 *highpc
= best_high
;
12208 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
12212 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
12213 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
12215 struct objfile
*objfile
= cu
->objfile
;
12216 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12217 struct attribute
*attr
;
12218 struct attribute
*attr_high
;
12220 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
12223 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
12226 CORE_ADDR low
= attr_value_as_address (attr
);
12227 CORE_ADDR high
= attr_value_as_address (attr_high
);
12229 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
12232 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
12233 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
12234 record_block_range (block
, low
, high
- 1);
12238 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
12241 bfd
*obfd
= objfile
->obfd
;
12242 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
12243 We take advantage of the fact that DW_AT_ranges does not appear
12244 in DW_TAG_compile_unit of DWO files. */
12245 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
12247 /* The value of the DW_AT_ranges attribute is the offset of the
12248 address range list in the .debug_ranges section. */
12249 unsigned long offset
= (DW_UNSND (attr
)
12250 + (need_ranges_base
? cu
->ranges_base
: 0));
12251 const gdb_byte
*buffer
;
12253 /* For some target architectures, but not others, the
12254 read_address function sign-extends the addresses it returns.
12255 To recognize base address selection entries, we need a
12257 unsigned int addr_size
= cu
->header
.addr_size
;
12258 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
12260 /* The base address, to which the next pair is relative. Note
12261 that this 'base' is a DWARF concept: most entries in a range
12262 list are relative, to reduce the number of relocs against the
12263 debugging information. This is separate from this function's
12264 'baseaddr' argument, which GDB uses to relocate debugging
12265 information from a shared library based on the address at
12266 which the library was loaded. */
12267 CORE_ADDR base
= cu
->base_address
;
12268 int base_known
= cu
->base_known
;
12270 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
12271 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
12273 complaint (&symfile_complaints
,
12274 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
12278 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
12282 unsigned int bytes_read
;
12283 CORE_ADDR start
, end
;
12285 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12286 buffer
+= bytes_read
;
12287 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12288 buffer
+= bytes_read
;
12290 /* Did we find the end of the range list? */
12291 if (start
== 0 && end
== 0)
12294 /* Did we find a base address selection entry? */
12295 else if ((start
& base_select_mask
) == base_select_mask
)
12301 /* We found an ordinary address range. */
12306 complaint (&symfile_complaints
,
12307 _("Invalid .debug_ranges data "
12308 "(no base address)"));
12314 /* Inverted range entries are invalid. */
12315 complaint (&symfile_complaints
,
12316 _("Invalid .debug_ranges data "
12317 "(inverted range)"));
12321 /* Empty range entries have no effect. */
12325 start
+= base
+ baseaddr
;
12326 end
+= base
+ baseaddr
;
12328 /* A not-uncommon case of bad debug info.
12329 Don't pollute the addrmap with bad data. */
12330 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12332 complaint (&symfile_complaints
,
12333 _(".debug_ranges entry has start address of zero"
12334 " [in module %s]"), objfile_name (objfile
));
12338 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
12339 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
12340 record_block_range (block
, start
, end
- 1);
12346 /* Check whether the producer field indicates either of GCC < 4.6, or the
12347 Intel C/C++ compiler, and cache the result in CU. */
12350 check_producer (struct dwarf2_cu
*cu
)
12354 if (cu
->producer
== NULL
)
12356 /* For unknown compilers expect their behavior is DWARF version
12359 GCC started to support .debug_types sections by -gdwarf-4 since
12360 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
12361 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
12362 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
12363 interpreted incorrectly by GDB now - GCC PR debug/48229. */
12365 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
12367 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
12368 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
12370 else if (startswith (cu
->producer
, "Intel(R) C"))
12371 cu
->producer_is_icc
= 1;
12374 /* For other non-GCC compilers, expect their behavior is DWARF version
12378 cu
->checked_producer
= 1;
12381 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
12382 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
12383 during 4.6.0 experimental. */
12386 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
12388 if (!cu
->checked_producer
)
12389 check_producer (cu
);
12391 return cu
->producer_is_gxx_lt_4_6
;
12394 /* Return the default accessibility type if it is not overriden by
12395 DW_AT_accessibility. */
12397 static enum dwarf_access_attribute
12398 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
12400 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
12402 /* The default DWARF 2 accessibility for members is public, the default
12403 accessibility for inheritance is private. */
12405 if (die
->tag
!= DW_TAG_inheritance
)
12406 return DW_ACCESS_public
;
12408 return DW_ACCESS_private
;
12412 /* DWARF 3+ defines the default accessibility a different way. The same
12413 rules apply now for DW_TAG_inheritance as for the members and it only
12414 depends on the container kind. */
12416 if (die
->parent
->tag
== DW_TAG_class_type
)
12417 return DW_ACCESS_private
;
12419 return DW_ACCESS_public
;
12423 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
12424 offset. If the attribute was not found return 0, otherwise return
12425 1. If it was found but could not properly be handled, set *OFFSET
12429 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
12432 struct attribute
*attr
;
12434 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
12439 /* Note that we do not check for a section offset first here.
12440 This is because DW_AT_data_member_location is new in DWARF 4,
12441 so if we see it, we can assume that a constant form is really
12442 a constant and not a section offset. */
12443 if (attr_form_is_constant (attr
))
12444 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
12445 else if (attr_form_is_section_offset (attr
))
12446 dwarf2_complex_location_expr_complaint ();
12447 else if (attr_form_is_block (attr
))
12448 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12450 dwarf2_complex_location_expr_complaint ();
12458 /* Add an aggregate field to the field list. */
12461 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
12462 struct dwarf2_cu
*cu
)
12464 struct objfile
*objfile
= cu
->objfile
;
12465 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12466 struct nextfield
*new_field
;
12467 struct attribute
*attr
;
12469 const char *fieldname
= "";
12471 /* Allocate a new field list entry and link it in. */
12472 new_field
= XNEW (struct nextfield
);
12473 make_cleanup (xfree
, new_field
);
12474 memset (new_field
, 0, sizeof (struct nextfield
));
12476 if (die
->tag
== DW_TAG_inheritance
)
12478 new_field
->next
= fip
->baseclasses
;
12479 fip
->baseclasses
= new_field
;
12483 new_field
->next
= fip
->fields
;
12484 fip
->fields
= new_field
;
12488 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
12490 new_field
->accessibility
= DW_UNSND (attr
);
12492 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
12493 if (new_field
->accessibility
!= DW_ACCESS_public
)
12494 fip
->non_public_fields
= 1;
12496 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
12498 new_field
->virtuality
= DW_UNSND (attr
);
12500 new_field
->virtuality
= DW_VIRTUALITY_none
;
12502 fp
= &new_field
->field
;
12504 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
12508 /* Data member other than a C++ static data member. */
12510 /* Get type of field. */
12511 fp
->type
= die_type (die
, cu
);
12513 SET_FIELD_BITPOS (*fp
, 0);
12515 /* Get bit size of field (zero if none). */
12516 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
12519 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
12523 FIELD_BITSIZE (*fp
) = 0;
12526 /* Get bit offset of field. */
12527 if (handle_data_member_location (die
, cu
, &offset
))
12528 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
12529 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
12532 if (gdbarch_bits_big_endian (gdbarch
))
12534 /* For big endian bits, the DW_AT_bit_offset gives the
12535 additional bit offset from the MSB of the containing
12536 anonymous object to the MSB of the field. We don't
12537 have to do anything special since we don't need to
12538 know the size of the anonymous object. */
12539 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
12543 /* For little endian bits, compute the bit offset to the
12544 MSB of the anonymous object, subtract off the number of
12545 bits from the MSB of the field to the MSB of the
12546 object, and then subtract off the number of bits of
12547 the field itself. The result is the bit offset of
12548 the LSB of the field. */
12549 int anonymous_size
;
12550 int bit_offset
= DW_UNSND (attr
);
12552 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12555 /* The size of the anonymous object containing
12556 the bit field is explicit, so use the
12557 indicated size (in bytes). */
12558 anonymous_size
= DW_UNSND (attr
);
12562 /* The size of the anonymous object containing
12563 the bit field must be inferred from the type
12564 attribute of the data member containing the
12566 anonymous_size
= TYPE_LENGTH (fp
->type
);
12568 SET_FIELD_BITPOS (*fp
,
12569 (FIELD_BITPOS (*fp
)
12570 + anonymous_size
* bits_per_byte
12571 - bit_offset
- FIELD_BITSIZE (*fp
)));
12574 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
12576 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
12577 + dwarf2_get_attr_constant_value (attr
, 0)));
12579 /* Get name of field. */
12580 fieldname
= dwarf2_name (die
, cu
);
12581 if (fieldname
== NULL
)
12584 /* The name is already allocated along with this objfile, so we don't
12585 need to duplicate it for the type. */
12586 fp
->name
= fieldname
;
12588 /* Change accessibility for artificial fields (e.g. virtual table
12589 pointer or virtual base class pointer) to private. */
12590 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
12592 FIELD_ARTIFICIAL (*fp
) = 1;
12593 new_field
->accessibility
= DW_ACCESS_private
;
12594 fip
->non_public_fields
= 1;
12597 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
12599 /* C++ static member. */
12601 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
12602 is a declaration, but all versions of G++ as of this writing
12603 (so through at least 3.2.1) incorrectly generate
12604 DW_TAG_variable tags. */
12606 const char *physname
;
12608 /* Get name of field. */
12609 fieldname
= dwarf2_name (die
, cu
);
12610 if (fieldname
== NULL
)
12613 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
12615 /* Only create a symbol if this is an external value.
12616 new_symbol checks this and puts the value in the global symbol
12617 table, which we want. If it is not external, new_symbol
12618 will try to put the value in cu->list_in_scope which is wrong. */
12619 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
12621 /* A static const member, not much different than an enum as far as
12622 we're concerned, except that we can support more types. */
12623 new_symbol (die
, NULL
, cu
);
12626 /* Get physical name. */
12627 physname
= dwarf2_physname (fieldname
, die
, cu
);
12629 /* The name is already allocated along with this objfile, so we don't
12630 need to duplicate it for the type. */
12631 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
12632 FIELD_TYPE (*fp
) = die_type (die
, cu
);
12633 FIELD_NAME (*fp
) = fieldname
;
12635 else if (die
->tag
== DW_TAG_inheritance
)
12639 /* C++ base class field. */
12640 if (handle_data_member_location (die
, cu
, &offset
))
12641 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
12642 FIELD_BITSIZE (*fp
) = 0;
12643 FIELD_TYPE (*fp
) = die_type (die
, cu
);
12644 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
12645 fip
->nbaseclasses
++;
12649 /* Add a typedef defined in the scope of the FIP's class. */
12652 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
12653 struct dwarf2_cu
*cu
)
12655 struct typedef_field_list
*new_field
;
12656 struct typedef_field
*fp
;
12658 /* Allocate a new field list entry and link it in. */
12659 new_field
= XCNEW (struct typedef_field_list
);
12660 make_cleanup (xfree
, new_field
);
12662 gdb_assert (die
->tag
== DW_TAG_typedef
);
12664 fp
= &new_field
->field
;
12666 /* Get name of field. */
12667 fp
->name
= dwarf2_name (die
, cu
);
12668 if (fp
->name
== NULL
)
12671 fp
->type
= read_type_die (die
, cu
);
12673 new_field
->next
= fip
->typedef_field_list
;
12674 fip
->typedef_field_list
= new_field
;
12675 fip
->typedef_field_list_count
++;
12678 /* Create the vector of fields, and attach it to the type. */
12681 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
12682 struct dwarf2_cu
*cu
)
12684 int nfields
= fip
->nfields
;
12686 /* Record the field count, allocate space for the array of fields,
12687 and create blank accessibility bitfields if necessary. */
12688 TYPE_NFIELDS (type
) = nfields
;
12689 TYPE_FIELDS (type
) = (struct field
*)
12690 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
12691 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
12693 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
12695 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12697 TYPE_FIELD_PRIVATE_BITS (type
) =
12698 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12699 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
12701 TYPE_FIELD_PROTECTED_BITS (type
) =
12702 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12703 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
12705 TYPE_FIELD_IGNORE_BITS (type
) =
12706 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12707 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
12710 /* If the type has baseclasses, allocate and clear a bit vector for
12711 TYPE_FIELD_VIRTUAL_BITS. */
12712 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
12714 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
12715 unsigned char *pointer
;
12717 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12718 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
12719 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
12720 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
12721 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
12724 /* Copy the saved-up fields into the field vector. Start from the head of
12725 the list, adding to the tail of the field array, so that they end up in
12726 the same order in the array in which they were added to the list. */
12727 while (nfields
-- > 0)
12729 struct nextfield
*fieldp
;
12733 fieldp
= fip
->fields
;
12734 fip
->fields
= fieldp
->next
;
12738 fieldp
= fip
->baseclasses
;
12739 fip
->baseclasses
= fieldp
->next
;
12742 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
12743 switch (fieldp
->accessibility
)
12745 case DW_ACCESS_private
:
12746 if (cu
->language
!= language_ada
)
12747 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
12750 case DW_ACCESS_protected
:
12751 if (cu
->language
!= language_ada
)
12752 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
12755 case DW_ACCESS_public
:
12759 /* Unknown accessibility. Complain and treat it as public. */
12761 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
12762 fieldp
->accessibility
);
12766 if (nfields
< fip
->nbaseclasses
)
12768 switch (fieldp
->virtuality
)
12770 case DW_VIRTUALITY_virtual
:
12771 case DW_VIRTUALITY_pure_virtual
:
12772 if (cu
->language
== language_ada
)
12773 error (_("unexpected virtuality in component of Ada type"));
12774 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
12781 /* Return true if this member function is a constructor, false
12785 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
12787 const char *fieldname
;
12788 const char *type_name
;
12791 if (die
->parent
== NULL
)
12794 if (die
->parent
->tag
!= DW_TAG_structure_type
12795 && die
->parent
->tag
!= DW_TAG_union_type
12796 && die
->parent
->tag
!= DW_TAG_class_type
)
12799 fieldname
= dwarf2_name (die
, cu
);
12800 type_name
= dwarf2_name (die
->parent
, cu
);
12801 if (fieldname
== NULL
|| type_name
== NULL
)
12804 len
= strlen (fieldname
);
12805 return (strncmp (fieldname
, type_name
, len
) == 0
12806 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
12809 /* Add a member function to the proper fieldlist. */
12812 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
12813 struct type
*type
, struct dwarf2_cu
*cu
)
12815 struct objfile
*objfile
= cu
->objfile
;
12816 struct attribute
*attr
;
12817 struct fnfieldlist
*flp
;
12819 struct fn_field
*fnp
;
12820 const char *fieldname
;
12821 struct nextfnfield
*new_fnfield
;
12822 struct type
*this_type
;
12823 enum dwarf_access_attribute accessibility
;
12825 if (cu
->language
== language_ada
)
12826 error (_("unexpected member function in Ada type"));
12828 /* Get name of member function. */
12829 fieldname
= dwarf2_name (die
, cu
);
12830 if (fieldname
== NULL
)
12833 /* Look up member function name in fieldlist. */
12834 for (i
= 0; i
< fip
->nfnfields
; i
++)
12836 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
12840 /* Create new list element if necessary. */
12841 if (i
< fip
->nfnfields
)
12842 flp
= &fip
->fnfieldlists
[i
];
12845 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
12847 fip
->fnfieldlists
= (struct fnfieldlist
*)
12848 xrealloc (fip
->fnfieldlists
,
12849 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
12850 * sizeof (struct fnfieldlist
));
12851 if (fip
->nfnfields
== 0)
12852 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
12854 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
12855 flp
->name
= fieldname
;
12858 i
= fip
->nfnfields
++;
12861 /* Create a new member function field and chain it to the field list
12863 new_fnfield
= XNEW (struct nextfnfield
);
12864 make_cleanup (xfree
, new_fnfield
);
12865 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
12866 new_fnfield
->next
= flp
->head
;
12867 flp
->head
= new_fnfield
;
12870 /* Fill in the member function field info. */
12871 fnp
= &new_fnfield
->fnfield
;
12873 /* Delay processing of the physname until later. */
12874 if (cu
->language
== language_cplus
)
12876 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
12881 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
12882 fnp
->physname
= physname
? physname
: "";
12885 fnp
->type
= alloc_type (objfile
);
12886 this_type
= read_type_die (die
, cu
);
12887 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
12889 int nparams
= TYPE_NFIELDS (this_type
);
12891 /* TYPE is the domain of this method, and THIS_TYPE is the type
12892 of the method itself (TYPE_CODE_METHOD). */
12893 smash_to_method_type (fnp
->type
, type
,
12894 TYPE_TARGET_TYPE (this_type
),
12895 TYPE_FIELDS (this_type
),
12896 TYPE_NFIELDS (this_type
),
12897 TYPE_VARARGS (this_type
));
12899 /* Handle static member functions.
12900 Dwarf2 has no clean way to discern C++ static and non-static
12901 member functions. G++ helps GDB by marking the first
12902 parameter for non-static member functions (which is the this
12903 pointer) as artificial. We obtain this information from
12904 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
12905 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
12906 fnp
->voffset
= VOFFSET_STATIC
;
12909 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
12910 dwarf2_full_name (fieldname
, die
, cu
));
12912 /* Get fcontext from DW_AT_containing_type if present. */
12913 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
12914 fnp
->fcontext
= die_containing_type (die
, cu
);
12916 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
12917 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
12919 /* Get accessibility. */
12920 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
12922 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
12924 accessibility
= dwarf2_default_access_attribute (die
, cu
);
12925 switch (accessibility
)
12927 case DW_ACCESS_private
:
12928 fnp
->is_private
= 1;
12930 case DW_ACCESS_protected
:
12931 fnp
->is_protected
= 1;
12935 /* Check for artificial methods. */
12936 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
12937 if (attr
&& DW_UNSND (attr
) != 0)
12938 fnp
->is_artificial
= 1;
12940 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
12942 /* Get index in virtual function table if it is a virtual member
12943 function. For older versions of GCC, this is an offset in the
12944 appropriate virtual table, as specified by DW_AT_containing_type.
12945 For everyone else, it is an expression to be evaluated relative
12946 to the object address. */
12948 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
12951 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
12953 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
12955 /* Old-style GCC. */
12956 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
12958 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
12959 || (DW_BLOCK (attr
)->size
> 1
12960 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
12961 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
12963 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12964 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
12965 dwarf2_complex_location_expr_complaint ();
12967 fnp
->voffset
/= cu
->header
.addr_size
;
12971 dwarf2_complex_location_expr_complaint ();
12973 if (!fnp
->fcontext
)
12975 /* If there is no `this' field and no DW_AT_containing_type,
12976 we cannot actually find a base class context for the
12978 if (TYPE_NFIELDS (this_type
) == 0
12979 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
12981 complaint (&symfile_complaints
,
12982 _("cannot determine context for virtual member "
12983 "function \"%s\" (offset %d)"),
12984 fieldname
, die
->offset
.sect_off
);
12989 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
12993 else if (attr_form_is_section_offset (attr
))
12995 dwarf2_complex_location_expr_complaint ();
12999 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
13005 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
13006 if (attr
&& DW_UNSND (attr
))
13008 /* GCC does this, as of 2008-08-25; PR debug/37237. */
13009 complaint (&symfile_complaints
,
13010 _("Member function \"%s\" (offset %d) is virtual "
13011 "but the vtable offset is not specified"),
13012 fieldname
, die
->offset
.sect_off
);
13013 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13014 TYPE_CPLUS_DYNAMIC (type
) = 1;
13019 /* Create the vector of member function fields, and attach it to the type. */
13022 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
13023 struct dwarf2_cu
*cu
)
13025 struct fnfieldlist
*flp
;
13028 if (cu
->language
== language_ada
)
13029 error (_("unexpected member functions in Ada type"));
13031 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13032 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
13033 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
13035 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
13037 struct nextfnfield
*nfp
= flp
->head
;
13038 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
13041 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
13042 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
13043 fn_flp
->fn_fields
= (struct fn_field
*)
13044 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
13045 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
13046 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
13049 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
13052 /* Returns non-zero if NAME is the name of a vtable member in CU's
13053 language, zero otherwise. */
13055 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
13057 static const char vptr
[] = "_vptr";
13058 static const char vtable
[] = "vtable";
13060 /* Look for the C++ form of the vtable. */
13061 if (startswith (name
, vptr
) && is_cplus_marker (name
[sizeof (vptr
) - 1]))
13067 /* GCC outputs unnamed structures that are really pointers to member
13068 functions, with the ABI-specified layout. If TYPE describes
13069 such a structure, smash it into a member function type.
13071 GCC shouldn't do this; it should just output pointer to member DIEs.
13072 This is GCC PR debug/28767. */
13075 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
13077 struct type
*pfn_type
, *self_type
, *new_type
;
13079 /* Check for a structure with no name and two children. */
13080 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
13083 /* Check for __pfn and __delta members. */
13084 if (TYPE_FIELD_NAME (type
, 0) == NULL
13085 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
13086 || TYPE_FIELD_NAME (type
, 1) == NULL
13087 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
13090 /* Find the type of the method. */
13091 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
13092 if (pfn_type
== NULL
13093 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
13094 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
13097 /* Look for the "this" argument. */
13098 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
13099 if (TYPE_NFIELDS (pfn_type
) == 0
13100 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
13101 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
13104 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
13105 new_type
= alloc_type (objfile
);
13106 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
13107 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
13108 TYPE_VARARGS (pfn_type
));
13109 smash_to_methodptr_type (type
, new_type
);
13112 /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler
13116 producer_is_icc (struct dwarf2_cu
*cu
)
13118 if (!cu
->checked_producer
)
13119 check_producer (cu
);
13121 return cu
->producer_is_icc
;
13124 /* Called when we find the DIE that starts a structure or union scope
13125 (definition) to create a type for the structure or union. Fill in
13126 the type's name and general properties; the members will not be
13127 processed until process_structure_scope. A symbol table entry for
13128 the type will also not be done until process_structure_scope (assuming
13129 the type has a name).
13131 NOTE: we need to call these functions regardless of whether or not the
13132 DIE has a DW_AT_name attribute, since it might be an anonymous
13133 structure or union. This gets the type entered into our set of
13134 user defined types. */
13136 static struct type
*
13137 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13139 struct objfile
*objfile
= cu
->objfile
;
13141 struct attribute
*attr
;
13144 /* If the definition of this type lives in .debug_types, read that type.
13145 Don't follow DW_AT_specification though, that will take us back up
13146 the chain and we want to go down. */
13147 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
13150 type
= get_DW_AT_signature_type (die
, attr
, cu
);
13152 /* The type's CU may not be the same as CU.
13153 Ensure TYPE is recorded with CU in die_type_hash. */
13154 return set_die_type (die
, type
, cu
);
13157 type
= alloc_type (objfile
);
13158 INIT_CPLUS_SPECIFIC (type
);
13160 name
= dwarf2_name (die
, cu
);
13163 if (cu
->language
== language_cplus
13164 || cu
->language
== language_d
13165 || cu
->language
== language_rust
)
13167 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
13169 /* dwarf2_full_name might have already finished building the DIE's
13170 type. If so, there is no need to continue. */
13171 if (get_die_type (die
, cu
) != NULL
)
13172 return get_die_type (die
, cu
);
13174 TYPE_TAG_NAME (type
) = full_name
;
13175 if (die
->tag
== DW_TAG_structure_type
13176 || die
->tag
== DW_TAG_class_type
)
13177 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
13181 /* The name is already allocated along with this objfile, so
13182 we don't need to duplicate it for the type. */
13183 TYPE_TAG_NAME (type
) = name
;
13184 if (die
->tag
== DW_TAG_class_type
)
13185 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
13189 if (die
->tag
== DW_TAG_structure_type
)
13191 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13193 else if (die
->tag
== DW_TAG_union_type
)
13195 TYPE_CODE (type
) = TYPE_CODE_UNION
;
13199 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13202 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
13203 TYPE_DECLARED_CLASS (type
) = 1;
13205 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13208 if (attr_form_is_constant (attr
))
13209 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13212 /* For the moment, dynamic type sizes are not supported
13213 by GDB's struct type. The actual size is determined
13214 on-demand when resolving the type of a given object,
13215 so set the type's length to zero for now. Otherwise,
13216 we record an expression as the length, and that expression
13217 could lead to a very large value, which could eventually
13218 lead to us trying to allocate that much memory when creating
13219 a value of that type. */
13220 TYPE_LENGTH (type
) = 0;
13225 TYPE_LENGTH (type
) = 0;
13228 if (producer_is_icc (cu
) && (TYPE_LENGTH (type
) == 0))
13230 /* ICC does not output the required DW_AT_declaration
13231 on incomplete types, but gives them a size of zero. */
13232 TYPE_STUB (type
) = 1;
13235 TYPE_STUB_SUPPORTED (type
) = 1;
13237 if (die_is_declaration (die
, cu
))
13238 TYPE_STUB (type
) = 1;
13239 else if (attr
== NULL
&& die
->child
== NULL
13240 && producer_is_realview (cu
->producer
))
13241 /* RealView does not output the required DW_AT_declaration
13242 on incomplete types. */
13243 TYPE_STUB (type
) = 1;
13245 /* We need to add the type field to the die immediately so we don't
13246 infinitely recurse when dealing with pointers to the structure
13247 type within the structure itself. */
13248 set_die_type (die
, type
, cu
);
13250 /* set_die_type should be already done. */
13251 set_descriptive_type (type
, die
, cu
);
13256 /* Finish creating a structure or union type, including filling in
13257 its members and creating a symbol for it. */
13260 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13262 struct objfile
*objfile
= cu
->objfile
;
13263 struct die_info
*child_die
;
13266 type
= get_die_type (die
, cu
);
13268 type
= read_structure_type (die
, cu
);
13270 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
13272 struct field_info fi
;
13273 VEC (symbolp
) *template_args
= NULL
;
13274 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
13276 memset (&fi
, 0, sizeof (struct field_info
));
13278 child_die
= die
->child
;
13280 while (child_die
&& child_die
->tag
)
13282 if (child_die
->tag
== DW_TAG_member
13283 || child_die
->tag
== DW_TAG_variable
)
13285 /* NOTE: carlton/2002-11-05: A C++ static data member
13286 should be a DW_TAG_member that is a declaration, but
13287 all versions of G++ as of this writing (so through at
13288 least 3.2.1) incorrectly generate DW_TAG_variable
13289 tags for them instead. */
13290 dwarf2_add_field (&fi
, child_die
, cu
);
13292 else if (child_die
->tag
== DW_TAG_subprogram
)
13294 /* Rust doesn't have member functions in the C++ sense.
13295 However, it does emit ordinary functions as children
13296 of a struct DIE. */
13297 if (cu
->language
== language_rust
)
13298 read_func_scope (child_die
, cu
);
13301 /* C++ member function. */
13302 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
13305 else if (child_die
->tag
== DW_TAG_inheritance
)
13307 /* C++ base class field. */
13308 dwarf2_add_field (&fi
, child_die
, cu
);
13310 else if (child_die
->tag
== DW_TAG_typedef
)
13311 dwarf2_add_typedef (&fi
, child_die
, cu
);
13312 else if (child_die
->tag
== DW_TAG_template_type_param
13313 || child_die
->tag
== DW_TAG_template_value_param
)
13315 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13318 VEC_safe_push (symbolp
, template_args
, arg
);
13321 child_die
= sibling_die (child_die
);
13324 /* Attach template arguments to type. */
13325 if (! VEC_empty (symbolp
, template_args
))
13327 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13328 TYPE_N_TEMPLATE_ARGUMENTS (type
)
13329 = VEC_length (symbolp
, template_args
);
13330 TYPE_TEMPLATE_ARGUMENTS (type
)
13331 = XOBNEWVEC (&objfile
->objfile_obstack
,
13333 TYPE_N_TEMPLATE_ARGUMENTS (type
));
13334 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
13335 VEC_address (symbolp
, template_args
),
13336 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
13337 * sizeof (struct symbol
*)));
13338 VEC_free (symbolp
, template_args
);
13341 /* Attach fields and member functions to the type. */
13343 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
13346 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
13348 /* Get the type which refers to the base class (possibly this
13349 class itself) which contains the vtable pointer for the current
13350 class from the DW_AT_containing_type attribute. This use of
13351 DW_AT_containing_type is a GNU extension. */
13353 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
13355 struct type
*t
= die_containing_type (die
, cu
);
13357 set_type_vptr_basetype (type
, t
);
13362 /* Our own class provides vtbl ptr. */
13363 for (i
= TYPE_NFIELDS (t
) - 1;
13364 i
>= TYPE_N_BASECLASSES (t
);
13367 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
13369 if (is_vtable_name (fieldname
, cu
))
13371 set_type_vptr_fieldno (type
, i
);
13376 /* Complain if virtual function table field not found. */
13377 if (i
< TYPE_N_BASECLASSES (t
))
13378 complaint (&symfile_complaints
,
13379 _("virtual function table pointer "
13380 "not found when defining class '%s'"),
13381 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
13386 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
13389 else if (cu
->producer
13390 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
13392 /* The IBM XLC compiler does not provide direct indication
13393 of the containing type, but the vtable pointer is
13394 always named __vfp. */
13398 for (i
= TYPE_NFIELDS (type
) - 1;
13399 i
>= TYPE_N_BASECLASSES (type
);
13402 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
13404 set_type_vptr_fieldno (type
, i
);
13405 set_type_vptr_basetype (type
, type
);
13412 /* Copy fi.typedef_field_list linked list elements content into the
13413 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
13414 if (fi
.typedef_field_list
)
13416 int i
= fi
.typedef_field_list_count
;
13418 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13419 TYPE_TYPEDEF_FIELD_ARRAY (type
)
13420 = ((struct typedef_field
*)
13421 TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
));
13422 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
13424 /* Reverse the list order to keep the debug info elements order. */
13427 struct typedef_field
*dest
, *src
;
13429 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
13430 src
= &fi
.typedef_field_list
->field
;
13431 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
13436 do_cleanups (back_to
);
13439 quirk_gcc_member_function_pointer (type
, objfile
);
13441 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
13442 snapshots) has been known to create a die giving a declaration
13443 for a class that has, as a child, a die giving a definition for a
13444 nested class. So we have to process our children even if the
13445 current die is a declaration. Normally, of course, a declaration
13446 won't have any children at all. */
13448 child_die
= die
->child
;
13450 while (child_die
!= NULL
&& child_die
->tag
)
13452 if (child_die
->tag
== DW_TAG_member
13453 || child_die
->tag
== DW_TAG_variable
13454 || child_die
->tag
== DW_TAG_inheritance
13455 || child_die
->tag
== DW_TAG_template_value_param
13456 || child_die
->tag
== DW_TAG_template_type_param
)
13461 process_die (child_die
, cu
);
13463 child_die
= sibling_die (child_die
);
13466 /* Do not consider external references. According to the DWARF standard,
13467 these DIEs are identified by the fact that they have no byte_size
13468 attribute, and a declaration attribute. */
13469 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
13470 || !die_is_declaration (die
, cu
))
13471 new_symbol (die
, type
, cu
);
13474 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
13475 update TYPE using some information only available in DIE's children. */
13478 update_enumeration_type_from_children (struct die_info
*die
,
13480 struct dwarf2_cu
*cu
)
13482 struct obstack obstack
;
13483 struct die_info
*child_die
;
13484 int unsigned_enum
= 1;
13487 struct cleanup
*old_chain
;
13489 obstack_init (&obstack
);
13490 old_chain
= make_cleanup_obstack_free (&obstack
);
13492 for (child_die
= die
->child
;
13493 child_die
!= NULL
&& child_die
->tag
;
13494 child_die
= sibling_die (child_die
))
13496 struct attribute
*attr
;
13498 const gdb_byte
*bytes
;
13499 struct dwarf2_locexpr_baton
*baton
;
13502 if (child_die
->tag
!= DW_TAG_enumerator
)
13505 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
13509 name
= dwarf2_name (child_die
, cu
);
13511 name
= "<anonymous enumerator>";
13513 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
13514 &value
, &bytes
, &baton
);
13520 else if ((mask
& value
) != 0)
13525 /* If we already know that the enum type is neither unsigned, nor
13526 a flag type, no need to look at the rest of the enumerates. */
13527 if (!unsigned_enum
&& !flag_enum
)
13532 TYPE_UNSIGNED (type
) = 1;
13534 TYPE_FLAG_ENUM (type
) = 1;
13536 do_cleanups (old_chain
);
13539 /* Given a DW_AT_enumeration_type die, set its type. We do not
13540 complete the type's fields yet, or create any symbols. */
13542 static struct type
*
13543 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13545 struct objfile
*objfile
= cu
->objfile
;
13547 struct attribute
*attr
;
13550 /* If the definition of this type lives in .debug_types, read that type.
13551 Don't follow DW_AT_specification though, that will take us back up
13552 the chain and we want to go down. */
13553 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
13556 type
= get_DW_AT_signature_type (die
, attr
, cu
);
13558 /* The type's CU may not be the same as CU.
13559 Ensure TYPE is recorded with CU in die_type_hash. */
13560 return set_die_type (die
, type
, cu
);
13563 type
= alloc_type (objfile
);
13565 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
13566 name
= dwarf2_full_name (NULL
, die
, cu
);
13568 TYPE_TAG_NAME (type
) = name
;
13570 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
13573 struct type
*underlying_type
= die_type (die
, cu
);
13575 TYPE_TARGET_TYPE (type
) = underlying_type
;
13578 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13581 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13585 TYPE_LENGTH (type
) = 0;
13588 /* The enumeration DIE can be incomplete. In Ada, any type can be
13589 declared as private in the package spec, and then defined only
13590 inside the package body. Such types are known as Taft Amendment
13591 Types. When another package uses such a type, an incomplete DIE
13592 may be generated by the compiler. */
13593 if (die_is_declaration (die
, cu
))
13594 TYPE_STUB (type
) = 1;
13596 /* Finish the creation of this type by using the enum's children.
13597 We must call this even when the underlying type has been provided
13598 so that we can determine if we're looking at a "flag" enum. */
13599 update_enumeration_type_from_children (die
, type
, cu
);
13601 /* If this type has an underlying type that is not a stub, then we
13602 may use its attributes. We always use the "unsigned" attribute
13603 in this situation, because ordinarily we guess whether the type
13604 is unsigned -- but the guess can be wrong and the underlying type
13605 can tell us the reality. However, we defer to a local size
13606 attribute if one exists, because this lets the compiler override
13607 the underlying type if needed. */
13608 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
13610 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
13611 if (TYPE_LENGTH (type
) == 0)
13612 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
13615 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
13617 return set_die_type (die
, type
, cu
);
13620 /* Given a pointer to a die which begins an enumeration, process all
13621 the dies that define the members of the enumeration, and create the
13622 symbol for the enumeration type.
13624 NOTE: We reverse the order of the element list. */
13627 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13629 struct type
*this_type
;
13631 this_type
= get_die_type (die
, cu
);
13632 if (this_type
== NULL
)
13633 this_type
= read_enumeration_type (die
, cu
);
13635 if (die
->child
!= NULL
)
13637 struct die_info
*child_die
;
13638 struct symbol
*sym
;
13639 struct field
*fields
= NULL
;
13640 int num_fields
= 0;
13643 child_die
= die
->child
;
13644 while (child_die
&& child_die
->tag
)
13646 if (child_die
->tag
!= DW_TAG_enumerator
)
13648 process_die (child_die
, cu
);
13652 name
= dwarf2_name (child_die
, cu
);
13655 sym
= new_symbol (child_die
, this_type
, cu
);
13657 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
13659 fields
= (struct field
*)
13661 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
13662 * sizeof (struct field
));
13665 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
13666 FIELD_TYPE (fields
[num_fields
]) = NULL
;
13667 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
13668 FIELD_BITSIZE (fields
[num_fields
]) = 0;
13674 child_die
= sibling_die (child_die
);
13679 TYPE_NFIELDS (this_type
) = num_fields
;
13680 TYPE_FIELDS (this_type
) = (struct field
*)
13681 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
13682 memcpy (TYPE_FIELDS (this_type
), fields
,
13683 sizeof (struct field
) * num_fields
);
13688 /* If we are reading an enum from a .debug_types unit, and the enum
13689 is a declaration, and the enum is not the signatured type in the
13690 unit, then we do not want to add a symbol for it. Adding a
13691 symbol would in some cases obscure the true definition of the
13692 enum, giving users an incomplete type when the definition is
13693 actually available. Note that we do not want to do this for all
13694 enums which are just declarations, because C++0x allows forward
13695 enum declarations. */
13696 if (cu
->per_cu
->is_debug_types
13697 && die_is_declaration (die
, cu
))
13699 struct signatured_type
*sig_type
;
13701 sig_type
= (struct signatured_type
*) cu
->per_cu
;
13702 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
13703 if (sig_type
->type_offset_in_section
.sect_off
!= die
->offset
.sect_off
)
13707 new_symbol (die
, this_type
, cu
);
13710 /* Extract all information from a DW_TAG_array_type DIE and put it in
13711 the DIE's type field. For now, this only handles one dimensional
13714 static struct type
*
13715 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13717 struct objfile
*objfile
= cu
->objfile
;
13718 struct die_info
*child_die
;
13720 struct type
*element_type
, *range_type
, *index_type
;
13721 struct type
**range_types
= NULL
;
13722 struct attribute
*attr
;
13724 struct cleanup
*back_to
;
13726 unsigned int bit_stride
= 0;
13728 element_type
= die_type (die
, cu
);
13730 /* The die_type call above may have already set the type for this DIE. */
13731 type
= get_die_type (die
, cu
);
13735 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
13737 bit_stride
= DW_UNSND (attr
) * 8;
13739 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
13741 bit_stride
= DW_UNSND (attr
);
13743 /* Irix 6.2 native cc creates array types without children for
13744 arrays with unspecified length. */
13745 if (die
->child
== NULL
)
13747 index_type
= objfile_type (objfile
)->builtin_int
;
13748 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
13749 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
13751 return set_die_type (die
, type
, cu
);
13754 back_to
= make_cleanup (null_cleanup
, NULL
);
13755 child_die
= die
->child
;
13756 while (child_die
&& child_die
->tag
)
13758 if (child_die
->tag
== DW_TAG_subrange_type
)
13760 struct type
*child_type
= read_type_die (child_die
, cu
);
13762 if (child_type
!= NULL
)
13764 /* The range type was succesfully read. Save it for the
13765 array type creation. */
13766 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
13768 range_types
= (struct type
**)
13769 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
13770 * sizeof (struct type
*));
13772 make_cleanup (free_current_contents
, &range_types
);
13774 range_types
[ndim
++] = child_type
;
13777 child_die
= sibling_die (child_die
);
13780 /* Dwarf2 dimensions are output from left to right, create the
13781 necessary array types in backwards order. */
13783 type
= element_type
;
13785 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
13790 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
13796 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
13800 /* Understand Dwarf2 support for vector types (like they occur on
13801 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
13802 array type. This is not part of the Dwarf2/3 standard yet, but a
13803 custom vendor extension. The main difference between a regular
13804 array and the vector variant is that vectors are passed by value
13806 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
13808 make_vector_type (type
);
13810 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
13811 implementation may choose to implement triple vectors using this
13813 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13816 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
13817 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13819 complaint (&symfile_complaints
,
13820 _("DW_AT_byte_size for array type smaller "
13821 "than the total size of elements"));
13824 name
= dwarf2_name (die
, cu
);
13826 TYPE_NAME (type
) = name
;
13828 /* Install the type in the die. */
13829 set_die_type (die
, type
, cu
);
13831 /* set_die_type should be already done. */
13832 set_descriptive_type (type
, die
, cu
);
13834 do_cleanups (back_to
);
13839 static enum dwarf_array_dim_ordering
13840 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
13842 struct attribute
*attr
;
13844 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
13847 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
13849 /* GNU F77 is a special case, as at 08/2004 array type info is the
13850 opposite order to the dwarf2 specification, but data is still
13851 laid out as per normal fortran.
13853 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
13854 version checking. */
13856 if (cu
->language
== language_fortran
13857 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
13859 return DW_ORD_row_major
;
13862 switch (cu
->language_defn
->la_array_ordering
)
13864 case array_column_major
:
13865 return DW_ORD_col_major
;
13866 case array_row_major
:
13868 return DW_ORD_row_major
;
13872 /* Extract all information from a DW_TAG_set_type DIE and put it in
13873 the DIE's type field. */
13875 static struct type
*
13876 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13878 struct type
*domain_type
, *set_type
;
13879 struct attribute
*attr
;
13881 domain_type
= die_type (die
, cu
);
13883 /* The die_type call above may have already set the type for this DIE. */
13884 set_type
= get_die_type (die
, cu
);
13888 set_type
= create_set_type (NULL
, domain_type
);
13890 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13892 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
13894 return set_die_type (die
, set_type
, cu
);
13897 /* A helper for read_common_block that creates a locexpr baton.
13898 SYM is the symbol which we are marking as computed.
13899 COMMON_DIE is the DIE for the common block.
13900 COMMON_LOC is the location expression attribute for the common
13902 MEMBER_LOC is the location expression attribute for the particular
13903 member of the common block that we are processing.
13904 CU is the CU from which the above come. */
13907 mark_common_block_symbol_computed (struct symbol
*sym
,
13908 struct die_info
*common_die
,
13909 struct attribute
*common_loc
,
13910 struct attribute
*member_loc
,
13911 struct dwarf2_cu
*cu
)
13913 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13914 struct dwarf2_locexpr_baton
*baton
;
13916 unsigned int cu_off
;
13917 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
13918 LONGEST offset
= 0;
13920 gdb_assert (common_loc
&& member_loc
);
13921 gdb_assert (attr_form_is_block (common_loc
));
13922 gdb_assert (attr_form_is_block (member_loc
)
13923 || attr_form_is_constant (member_loc
));
13925 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
13926 baton
->per_cu
= cu
->per_cu
;
13927 gdb_assert (baton
->per_cu
);
13929 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
13931 if (attr_form_is_constant (member_loc
))
13933 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
13934 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
13937 baton
->size
+= DW_BLOCK (member_loc
)->size
;
13939 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
13942 *ptr
++ = DW_OP_call4
;
13943 cu_off
= common_die
->offset
.sect_off
- cu
->per_cu
->offset
.sect_off
;
13944 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
13947 if (attr_form_is_constant (member_loc
))
13949 *ptr
++ = DW_OP_addr
;
13950 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
13951 ptr
+= cu
->header
.addr_size
;
13955 /* We have to copy the data here, because DW_OP_call4 will only
13956 use a DW_AT_location attribute. */
13957 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
13958 ptr
+= DW_BLOCK (member_loc
)->size
;
13961 *ptr
++ = DW_OP_plus
;
13962 gdb_assert (ptr
- baton
->data
== baton
->size
);
13964 SYMBOL_LOCATION_BATON (sym
) = baton
;
13965 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
13968 /* Create appropriate locally-scoped variables for all the
13969 DW_TAG_common_block entries. Also create a struct common_block
13970 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
13971 is used to sepate the common blocks name namespace from regular
13975 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
13977 struct attribute
*attr
;
13979 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
13982 /* Support the .debug_loc offsets. */
13983 if (attr_form_is_block (attr
))
13987 else if (attr_form_is_section_offset (attr
))
13989 dwarf2_complex_location_expr_complaint ();
13994 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
13995 "common block member");
14000 if (die
->child
!= NULL
)
14002 struct objfile
*objfile
= cu
->objfile
;
14003 struct die_info
*child_die
;
14004 size_t n_entries
= 0, size
;
14005 struct common_block
*common_block
;
14006 struct symbol
*sym
;
14008 for (child_die
= die
->child
;
14009 child_die
&& child_die
->tag
;
14010 child_die
= sibling_die (child_die
))
14013 size
= (sizeof (struct common_block
)
14014 + (n_entries
- 1) * sizeof (struct symbol
*));
14016 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
14018 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
14019 common_block
->n_entries
= 0;
14021 for (child_die
= die
->child
;
14022 child_die
&& child_die
->tag
;
14023 child_die
= sibling_die (child_die
))
14025 /* Create the symbol in the DW_TAG_common_block block in the current
14027 sym
= new_symbol (child_die
, NULL
, cu
);
14030 struct attribute
*member_loc
;
14032 common_block
->contents
[common_block
->n_entries
++] = sym
;
14034 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
14038 /* GDB has handled this for a long time, but it is
14039 not specified by DWARF. It seems to have been
14040 emitted by gfortran at least as recently as:
14041 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
14042 complaint (&symfile_complaints
,
14043 _("Variable in common block has "
14044 "DW_AT_data_member_location "
14045 "- DIE at 0x%x [in module %s]"),
14046 child_die
->offset
.sect_off
,
14047 objfile_name (cu
->objfile
));
14049 if (attr_form_is_section_offset (member_loc
))
14050 dwarf2_complex_location_expr_complaint ();
14051 else if (attr_form_is_constant (member_loc
)
14052 || attr_form_is_block (member_loc
))
14055 mark_common_block_symbol_computed (sym
, die
, attr
,
14059 dwarf2_complex_location_expr_complaint ();
14064 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
14065 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
14069 /* Create a type for a C++ namespace. */
14071 static struct type
*
14072 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14074 struct objfile
*objfile
= cu
->objfile
;
14075 const char *previous_prefix
, *name
;
14079 /* For extensions, reuse the type of the original namespace. */
14080 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
14082 struct die_info
*ext_die
;
14083 struct dwarf2_cu
*ext_cu
= cu
;
14085 ext_die
= dwarf2_extension (die
, &ext_cu
);
14086 type
= read_type_die (ext_die
, ext_cu
);
14088 /* EXT_CU may not be the same as CU.
14089 Ensure TYPE is recorded with CU in die_type_hash. */
14090 return set_die_type (die
, type
, cu
);
14093 name
= namespace_name (die
, &is_anonymous
, cu
);
14095 /* Now build the name of the current namespace. */
14097 previous_prefix
= determine_prefix (die
, cu
);
14098 if (previous_prefix
[0] != '\0')
14099 name
= typename_concat (&objfile
->objfile_obstack
,
14100 previous_prefix
, name
, 0, cu
);
14102 /* Create the type. */
14103 type
= init_type (objfile
, TYPE_CODE_NAMESPACE
, 0, name
);
14104 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
14106 return set_die_type (die
, type
, cu
);
14109 /* Read a namespace scope. */
14112 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
14114 struct objfile
*objfile
= cu
->objfile
;
14117 /* Add a symbol associated to this if we haven't seen the namespace
14118 before. Also, add a using directive if it's an anonymous
14121 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
14125 type
= read_type_die (die
, cu
);
14126 new_symbol (die
, type
, cu
);
14128 namespace_name (die
, &is_anonymous
, cu
);
14131 const char *previous_prefix
= determine_prefix (die
, cu
);
14133 add_using_directive (using_directives (cu
->language
),
14134 previous_prefix
, TYPE_NAME (type
), NULL
,
14135 NULL
, NULL
, 0, &objfile
->objfile_obstack
);
14139 if (die
->child
!= NULL
)
14141 struct die_info
*child_die
= die
->child
;
14143 while (child_die
&& child_die
->tag
)
14145 process_die (child_die
, cu
);
14146 child_die
= sibling_die (child_die
);
14151 /* Read a Fortran module as type. This DIE can be only a declaration used for
14152 imported module. Still we need that type as local Fortran "use ... only"
14153 declaration imports depend on the created type in determine_prefix. */
14155 static struct type
*
14156 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14158 struct objfile
*objfile
= cu
->objfile
;
14159 const char *module_name
;
14162 module_name
= dwarf2_name (die
, cu
);
14164 complaint (&symfile_complaints
,
14165 _("DW_TAG_module has no name, offset 0x%x"),
14166 die
->offset
.sect_off
);
14167 type
= init_type (objfile
, TYPE_CODE_MODULE
, 0, module_name
);
14169 /* determine_prefix uses TYPE_TAG_NAME. */
14170 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
14172 return set_die_type (die
, type
, cu
);
14175 /* Read a Fortran module. */
14178 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
14180 struct die_info
*child_die
= die
->child
;
14183 type
= read_type_die (die
, cu
);
14184 new_symbol (die
, type
, cu
);
14186 while (child_die
&& child_die
->tag
)
14188 process_die (child_die
, cu
);
14189 child_die
= sibling_die (child_die
);
14193 /* Return the name of the namespace represented by DIE. Set
14194 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
14197 static const char *
14198 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
14200 struct die_info
*current_die
;
14201 const char *name
= NULL
;
14203 /* Loop through the extensions until we find a name. */
14205 for (current_die
= die
;
14206 current_die
!= NULL
;
14207 current_die
= dwarf2_extension (die
, &cu
))
14209 /* We don't use dwarf2_name here so that we can detect the absence
14210 of a name -> anonymous namespace. */
14211 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
14217 /* Is it an anonymous namespace? */
14219 *is_anonymous
= (name
== NULL
);
14221 name
= CP_ANONYMOUS_NAMESPACE_STR
;
14226 /* Extract all information from a DW_TAG_pointer_type DIE and add to
14227 the user defined type vector. */
14229 static struct type
*
14230 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14232 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
14233 struct comp_unit_head
*cu_header
= &cu
->header
;
14235 struct attribute
*attr_byte_size
;
14236 struct attribute
*attr_address_class
;
14237 int byte_size
, addr_class
;
14238 struct type
*target_type
;
14240 target_type
= die_type (die
, cu
);
14242 /* The die_type call above may have already set the type for this DIE. */
14243 type
= get_die_type (die
, cu
);
14247 type
= lookup_pointer_type (target_type
);
14249 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14250 if (attr_byte_size
)
14251 byte_size
= DW_UNSND (attr_byte_size
);
14253 byte_size
= cu_header
->addr_size
;
14255 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
14256 if (attr_address_class
)
14257 addr_class
= DW_UNSND (attr_address_class
);
14259 addr_class
= DW_ADDR_none
;
14261 /* If the pointer size or address class is different than the
14262 default, create a type variant marked as such and set the
14263 length accordingly. */
14264 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
14266 if (gdbarch_address_class_type_flags_p (gdbarch
))
14270 type_flags
= gdbarch_address_class_type_flags
14271 (gdbarch
, byte_size
, addr_class
);
14272 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
14274 type
= make_type_with_address_space (type
, type_flags
);
14276 else if (TYPE_LENGTH (type
) != byte_size
)
14278 complaint (&symfile_complaints
,
14279 _("invalid pointer size %d"), byte_size
);
14283 /* Should we also complain about unhandled address classes? */
14287 TYPE_LENGTH (type
) = byte_size
;
14288 return set_die_type (die
, type
, cu
);
14291 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
14292 the user defined type vector. */
14294 static struct type
*
14295 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14298 struct type
*to_type
;
14299 struct type
*domain
;
14301 to_type
= die_type (die
, cu
);
14302 domain
= die_containing_type (die
, cu
);
14304 /* The calls above may have already set the type for this DIE. */
14305 type
= get_die_type (die
, cu
);
14309 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
14310 type
= lookup_methodptr_type (to_type
);
14311 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
14313 struct type
*new_type
= alloc_type (cu
->objfile
);
14315 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
14316 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
14317 TYPE_VARARGS (to_type
));
14318 type
= lookup_methodptr_type (new_type
);
14321 type
= lookup_memberptr_type (to_type
, domain
);
14323 return set_die_type (die
, type
, cu
);
14326 /* Extract all information from a DW_TAG_reference_type DIE and add to
14327 the user defined type vector. */
14329 static struct type
*
14330 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14332 struct comp_unit_head
*cu_header
= &cu
->header
;
14333 struct type
*type
, *target_type
;
14334 struct attribute
*attr
;
14336 target_type
= die_type (die
, cu
);
14338 /* The die_type call above may have already set the type for this DIE. */
14339 type
= get_die_type (die
, cu
);
14343 type
= lookup_reference_type (target_type
);
14344 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14347 TYPE_LENGTH (type
) = DW_UNSND (attr
);
14351 TYPE_LENGTH (type
) = cu_header
->addr_size
;
14353 return set_die_type (die
, type
, cu
);
14356 /* Add the given cv-qualifiers to the element type of the array. GCC
14357 outputs DWARF type qualifiers that apply to an array, not the
14358 element type. But GDB relies on the array element type to carry
14359 the cv-qualifiers. This mimics section 6.7.3 of the C99
14362 static struct type
*
14363 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
14364 struct type
*base_type
, int cnst
, int voltl
)
14366 struct type
*el_type
, *inner_array
;
14368 base_type
= copy_type (base_type
);
14369 inner_array
= base_type
;
14371 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
14373 TYPE_TARGET_TYPE (inner_array
) =
14374 copy_type (TYPE_TARGET_TYPE (inner_array
));
14375 inner_array
= TYPE_TARGET_TYPE (inner_array
);
14378 el_type
= TYPE_TARGET_TYPE (inner_array
);
14379 cnst
|= TYPE_CONST (el_type
);
14380 voltl
|= TYPE_VOLATILE (el_type
);
14381 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
14383 return set_die_type (die
, base_type
, cu
);
14386 static struct type
*
14387 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14389 struct type
*base_type
, *cv_type
;
14391 base_type
= die_type (die
, cu
);
14393 /* The die_type call above may have already set the type for this DIE. */
14394 cv_type
= get_die_type (die
, cu
);
14398 /* In case the const qualifier is applied to an array type, the element type
14399 is so qualified, not the array type (section 6.7.3 of C99). */
14400 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14401 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
14403 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
14404 return set_die_type (die
, cv_type
, cu
);
14407 static struct type
*
14408 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14410 struct type
*base_type
, *cv_type
;
14412 base_type
= die_type (die
, cu
);
14414 /* The die_type call above may have already set the type for this DIE. */
14415 cv_type
= get_die_type (die
, cu
);
14419 /* In case the volatile qualifier is applied to an array type, the
14420 element type is so qualified, not the array type (section 6.7.3
14422 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14423 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
14425 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
14426 return set_die_type (die
, cv_type
, cu
);
14429 /* Handle DW_TAG_restrict_type. */
14431 static struct type
*
14432 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14434 struct type
*base_type
, *cv_type
;
14436 base_type
= die_type (die
, cu
);
14438 /* The die_type call above may have already set the type for this DIE. */
14439 cv_type
= get_die_type (die
, cu
);
14443 cv_type
= make_restrict_type (base_type
);
14444 return set_die_type (die
, cv_type
, cu
);
14447 /* Handle DW_TAG_atomic_type. */
14449 static struct type
*
14450 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14452 struct type
*base_type
, *cv_type
;
14454 base_type
= die_type (die
, cu
);
14456 /* The die_type call above may have already set the type for this DIE. */
14457 cv_type
= get_die_type (die
, cu
);
14461 cv_type
= make_atomic_type (base_type
);
14462 return set_die_type (die
, cv_type
, cu
);
14465 /* Extract all information from a DW_TAG_string_type DIE and add to
14466 the user defined type vector. It isn't really a user defined type,
14467 but it behaves like one, with other DIE's using an AT_user_def_type
14468 attribute to reference it. */
14470 static struct type
*
14471 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14473 struct objfile
*objfile
= cu
->objfile
;
14474 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14475 struct type
*type
, *range_type
, *index_type
, *char_type
;
14476 struct attribute
*attr
;
14477 unsigned int length
;
14479 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
14482 length
= DW_UNSND (attr
);
14486 /* Check for the DW_AT_byte_size attribute. */
14487 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14490 length
= DW_UNSND (attr
);
14498 index_type
= objfile_type (objfile
)->builtin_int
;
14499 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
14500 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
14501 type
= create_string_type (NULL
, char_type
, range_type
);
14503 return set_die_type (die
, type
, cu
);
14506 /* Assuming that DIE corresponds to a function, returns nonzero
14507 if the function is prototyped. */
14510 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
14512 struct attribute
*attr
;
14514 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
14515 if (attr
&& (DW_UNSND (attr
) != 0))
14518 /* The DWARF standard implies that the DW_AT_prototyped attribute
14519 is only meaninful for C, but the concept also extends to other
14520 languages that allow unprototyped functions (Eg: Objective C).
14521 For all other languages, assume that functions are always
14523 if (cu
->language
!= language_c
14524 && cu
->language
!= language_objc
14525 && cu
->language
!= language_opencl
)
14528 /* RealView does not emit DW_AT_prototyped. We can not distinguish
14529 prototyped and unprototyped functions; default to prototyped,
14530 since that is more common in modern code (and RealView warns
14531 about unprototyped functions). */
14532 if (producer_is_realview (cu
->producer
))
14538 /* Handle DIES due to C code like:
14542 int (*funcp)(int a, long l);
14546 ('funcp' generates a DW_TAG_subroutine_type DIE). */
14548 static struct type
*
14549 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14551 struct objfile
*objfile
= cu
->objfile
;
14552 struct type
*type
; /* Type that this function returns. */
14553 struct type
*ftype
; /* Function that returns above type. */
14554 struct attribute
*attr
;
14556 type
= die_type (die
, cu
);
14558 /* The die_type call above may have already set the type for this DIE. */
14559 ftype
= get_die_type (die
, cu
);
14563 ftype
= lookup_function_type (type
);
14565 if (prototyped_function_p (die
, cu
))
14566 TYPE_PROTOTYPED (ftype
) = 1;
14568 /* Store the calling convention in the type if it's available in
14569 the subroutine die. Otherwise set the calling convention to
14570 the default value DW_CC_normal. */
14571 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
14573 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
14574 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
14575 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
14577 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
14579 /* Record whether the function returns normally to its caller or not
14580 if the DWARF producer set that information. */
14581 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
14582 if (attr
&& (DW_UNSND (attr
) != 0))
14583 TYPE_NO_RETURN (ftype
) = 1;
14585 /* We need to add the subroutine type to the die immediately so
14586 we don't infinitely recurse when dealing with parameters
14587 declared as the same subroutine type. */
14588 set_die_type (die
, ftype
, cu
);
14590 if (die
->child
!= NULL
)
14592 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
14593 struct die_info
*child_die
;
14594 int nparams
, iparams
;
14596 /* Count the number of parameters.
14597 FIXME: GDB currently ignores vararg functions, but knows about
14598 vararg member functions. */
14600 child_die
= die
->child
;
14601 while (child_die
&& child_die
->tag
)
14603 if (child_die
->tag
== DW_TAG_formal_parameter
)
14605 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
14606 TYPE_VARARGS (ftype
) = 1;
14607 child_die
= sibling_die (child_die
);
14610 /* Allocate storage for parameters and fill them in. */
14611 TYPE_NFIELDS (ftype
) = nparams
;
14612 TYPE_FIELDS (ftype
) = (struct field
*)
14613 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
14615 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
14616 even if we error out during the parameters reading below. */
14617 for (iparams
= 0; iparams
< nparams
; iparams
++)
14618 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
14621 child_die
= die
->child
;
14622 while (child_die
&& child_die
->tag
)
14624 if (child_die
->tag
== DW_TAG_formal_parameter
)
14626 struct type
*arg_type
;
14628 /* DWARF version 2 has no clean way to discern C++
14629 static and non-static member functions. G++ helps
14630 GDB by marking the first parameter for non-static
14631 member functions (which is the this pointer) as
14632 artificial. We pass this information to
14633 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
14635 DWARF version 3 added DW_AT_object_pointer, which GCC
14636 4.5 does not yet generate. */
14637 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
14639 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
14641 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
14642 arg_type
= die_type (child_die
, cu
);
14644 /* RealView does not mark THIS as const, which the testsuite
14645 expects. GCC marks THIS as const in method definitions,
14646 but not in the class specifications (GCC PR 43053). */
14647 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
14648 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
14651 struct dwarf2_cu
*arg_cu
= cu
;
14652 const char *name
= dwarf2_name (child_die
, cu
);
14654 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
14657 /* If the compiler emits this, use it. */
14658 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
14661 else if (name
&& strcmp (name
, "this") == 0)
14662 /* Function definitions will have the argument names. */
14664 else if (name
== NULL
&& iparams
== 0)
14665 /* Declarations may not have the names, so like
14666 elsewhere in GDB, assume an artificial first
14667 argument is "this". */
14671 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
14675 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
14678 child_die
= sibling_die (child_die
);
14685 static struct type
*
14686 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
14688 struct objfile
*objfile
= cu
->objfile
;
14689 const char *name
= NULL
;
14690 struct type
*this_type
, *target_type
;
14692 name
= dwarf2_full_name (NULL
, die
, cu
);
14693 this_type
= init_type (objfile
, TYPE_CODE_TYPEDEF
, 0, name
);
14694 TYPE_TARGET_STUB (this_type
) = 1;
14695 set_die_type (die
, this_type
, cu
);
14696 target_type
= die_type (die
, cu
);
14697 if (target_type
!= this_type
)
14698 TYPE_TARGET_TYPE (this_type
) = target_type
;
14701 /* Self-referential typedefs are, it seems, not allowed by the DWARF
14702 spec and cause infinite loops in GDB. */
14703 complaint (&symfile_complaints
,
14704 _("Self-referential DW_TAG_typedef "
14705 "- DIE at 0x%x [in module %s]"),
14706 die
->offset
.sect_off
, objfile_name (objfile
));
14707 TYPE_TARGET_TYPE (this_type
) = NULL
;
14712 /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT
14713 (which may be different from NAME) to the architecture back-end to allow
14714 it to guess the correct format if necessary. */
14716 static struct type
*
14717 dwarf2_init_float_type (struct objfile
*objfile
, int bits
, const char *name
,
14718 const char *name_hint
)
14720 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14721 const struct floatformat
**format
;
14724 format
= gdbarch_floatformat_for_type (gdbarch
, name_hint
, bits
);
14726 type
= init_float_type (objfile
, bits
, name
, format
);
14728 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
/ TARGET_CHAR_BIT
, name
);
14733 /* Find a representation of a given base type and install
14734 it in the TYPE field of the die. */
14736 static struct type
*
14737 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14739 struct objfile
*objfile
= cu
->objfile
;
14741 struct attribute
*attr
;
14742 int encoding
= 0, bits
= 0;
14745 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
14748 encoding
= DW_UNSND (attr
);
14750 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14753 bits
= DW_UNSND (attr
) * TARGET_CHAR_BIT
;
14755 name
= dwarf2_name (die
, cu
);
14758 complaint (&symfile_complaints
,
14759 _("DW_AT_name missing from DW_TAG_base_type"));
14764 case DW_ATE_address
:
14765 /* Turn DW_ATE_address into a void * pointer. */
14766 type
= init_type (objfile
, TYPE_CODE_VOID
, 1, NULL
);
14767 type
= init_pointer_type (objfile
, bits
, name
, type
);
14769 case DW_ATE_boolean
:
14770 type
= init_boolean_type (objfile
, bits
, 1, name
);
14772 case DW_ATE_complex_float
:
14773 type
= dwarf2_init_float_type (objfile
, bits
/ 2, NULL
, name
);
14774 type
= init_complex_type (objfile
, name
, type
);
14776 case DW_ATE_decimal_float
:
14777 type
= init_decfloat_type (objfile
, bits
, name
);
14780 type
= dwarf2_init_float_type (objfile
, bits
, name
, name
);
14782 case DW_ATE_signed
:
14783 type
= init_integer_type (objfile
, bits
, 0, name
);
14785 case DW_ATE_unsigned
:
14786 if (cu
->language
== language_fortran
14788 && startswith (name
, "character("))
14789 type
= init_character_type (objfile
, bits
, 1, name
);
14791 type
= init_integer_type (objfile
, bits
, 1, name
);
14793 case DW_ATE_signed_char
:
14794 if (cu
->language
== language_ada
|| cu
->language
== language_m2
14795 || cu
->language
== language_pascal
14796 || cu
->language
== language_fortran
)
14797 type
= init_character_type (objfile
, bits
, 0, name
);
14799 type
= init_integer_type (objfile
, bits
, 0, name
);
14801 case DW_ATE_unsigned_char
:
14802 if (cu
->language
== language_ada
|| cu
->language
== language_m2
14803 || cu
->language
== language_pascal
14804 || cu
->language
== language_fortran
14805 || cu
->language
== language_rust
)
14806 type
= init_character_type (objfile
, bits
, 1, name
);
14808 type
= init_integer_type (objfile
, bits
, 1, name
);
14811 /* We just treat this as an integer and then recognize the
14812 type by name elsewhere. */
14813 type
= init_integer_type (objfile
, bits
, 0, name
);
14817 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
14818 dwarf_type_encoding_name (encoding
));
14819 type
= init_type (objfile
, TYPE_CODE_ERROR
,
14820 bits
/ TARGET_CHAR_BIT
, name
);
14824 if (name
&& strcmp (name
, "char") == 0)
14825 TYPE_NOSIGN (type
) = 1;
14827 return set_die_type (die
, type
, cu
);
14830 /* Parse dwarf attribute if it's a block, reference or constant and put the
14831 resulting value of the attribute into struct bound_prop.
14832 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
14835 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
14836 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
)
14838 struct dwarf2_property_baton
*baton
;
14839 struct obstack
*obstack
= &cu
->objfile
->objfile_obstack
;
14841 if (attr
== NULL
|| prop
== NULL
)
14844 if (attr_form_is_block (attr
))
14846 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
14847 baton
->referenced_type
= NULL
;
14848 baton
->locexpr
.per_cu
= cu
->per_cu
;
14849 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
14850 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
14851 prop
->data
.baton
= baton
;
14852 prop
->kind
= PROP_LOCEXPR
;
14853 gdb_assert (prop
->data
.baton
!= NULL
);
14855 else if (attr_form_is_ref (attr
))
14857 struct dwarf2_cu
*target_cu
= cu
;
14858 struct die_info
*target_die
;
14859 struct attribute
*target_attr
;
14861 target_die
= follow_die_ref (die
, attr
, &target_cu
);
14862 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
14863 if (target_attr
== NULL
)
14864 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
14866 if (target_attr
== NULL
)
14869 switch (target_attr
->name
)
14871 case DW_AT_location
:
14872 if (attr_form_is_section_offset (target_attr
))
14874 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
14875 baton
->referenced_type
= die_type (target_die
, target_cu
);
14876 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
14877 prop
->data
.baton
= baton
;
14878 prop
->kind
= PROP_LOCLIST
;
14879 gdb_assert (prop
->data
.baton
!= NULL
);
14881 else if (attr_form_is_block (target_attr
))
14883 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
14884 baton
->referenced_type
= die_type (target_die
, target_cu
);
14885 baton
->locexpr
.per_cu
= cu
->per_cu
;
14886 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
14887 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
14888 prop
->data
.baton
= baton
;
14889 prop
->kind
= PROP_LOCEXPR
;
14890 gdb_assert (prop
->data
.baton
!= NULL
);
14894 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
14895 "dynamic property");
14899 case DW_AT_data_member_location
:
14903 if (!handle_data_member_location (target_die
, target_cu
,
14907 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
14908 baton
->referenced_type
= read_type_die (target_die
->parent
,
14910 baton
->offset_info
.offset
= offset
;
14911 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
14912 prop
->data
.baton
= baton
;
14913 prop
->kind
= PROP_ADDR_OFFSET
;
14918 else if (attr_form_is_constant (attr
))
14920 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
14921 prop
->kind
= PROP_CONST
;
14925 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
14926 dwarf2_name (die
, cu
));
14933 /* Read the given DW_AT_subrange DIE. */
14935 static struct type
*
14936 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14938 struct type
*base_type
, *orig_base_type
;
14939 struct type
*range_type
;
14940 struct attribute
*attr
;
14941 struct dynamic_prop low
, high
;
14942 int low_default_is_valid
;
14943 int high_bound_is_count
= 0;
14945 LONGEST negative_mask
;
14947 orig_base_type
= die_type (die
, cu
);
14948 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
14949 whereas the real type might be. So, we use ORIG_BASE_TYPE when
14950 creating the range type, but we use the result of check_typedef
14951 when examining properties of the type. */
14952 base_type
= check_typedef (orig_base_type
);
14954 /* The die_type call above may have already set the type for this DIE. */
14955 range_type
= get_die_type (die
, cu
);
14959 low
.kind
= PROP_CONST
;
14960 high
.kind
= PROP_CONST
;
14961 high
.data
.const_val
= 0;
14963 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
14964 omitting DW_AT_lower_bound. */
14965 switch (cu
->language
)
14968 case language_cplus
:
14969 low
.data
.const_val
= 0;
14970 low_default_is_valid
= 1;
14972 case language_fortran
:
14973 low
.data
.const_val
= 1;
14974 low_default_is_valid
= 1;
14977 case language_objc
:
14978 case language_rust
:
14979 low
.data
.const_val
= 0;
14980 low_default_is_valid
= (cu
->header
.version
>= 4);
14984 case language_pascal
:
14985 low
.data
.const_val
= 1;
14986 low_default_is_valid
= (cu
->header
.version
>= 4);
14989 low
.data
.const_val
= 0;
14990 low_default_is_valid
= 0;
14994 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
14996 attr_to_dynamic_prop (attr
, die
, cu
, &low
);
14997 else if (!low_default_is_valid
)
14998 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
14999 "- DIE at 0x%x [in module %s]"),
15000 die
->offset
.sect_off
, objfile_name (cu
->objfile
));
15002 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
15003 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
))
15005 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
15006 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
))
15008 /* If bounds are constant do the final calculation here. */
15009 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
15010 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
15012 high_bound_is_count
= 1;
15016 /* Dwarf-2 specifications explicitly allows to create subrange types
15017 without specifying a base type.
15018 In that case, the base type must be set to the type of
15019 the lower bound, upper bound or count, in that order, if any of these
15020 three attributes references an object that has a type.
15021 If no base type is found, the Dwarf-2 specifications say that
15022 a signed integer type of size equal to the size of an address should
15024 For the following C code: `extern char gdb_int [];'
15025 GCC produces an empty range DIE.
15026 FIXME: muller/2010-05-28: Possible references to object for low bound,
15027 high bound or count are not yet handled by this code. */
15028 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
15030 struct objfile
*objfile
= cu
->objfile
;
15031 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15032 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
15033 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
15035 /* Test "int", "long int", and "long long int" objfile types,
15036 and select the first one having a size above or equal to the
15037 architecture address size. */
15038 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15039 base_type
= int_type
;
15042 int_type
= objfile_type (objfile
)->builtin_long
;
15043 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15044 base_type
= int_type
;
15047 int_type
= objfile_type (objfile
)->builtin_long_long
;
15048 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15049 base_type
= int_type
;
15054 /* Normally, the DWARF producers are expected to use a signed
15055 constant form (Eg. DW_FORM_sdata) to express negative bounds.
15056 But this is unfortunately not always the case, as witnessed
15057 with GCC, for instance, where the ambiguous DW_FORM_dataN form
15058 is used instead. To work around that ambiguity, we treat
15059 the bounds as signed, and thus sign-extend their values, when
15060 the base type is signed. */
15062 -((LONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
15063 if (low
.kind
== PROP_CONST
15064 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
15065 low
.data
.const_val
|= negative_mask
;
15066 if (high
.kind
== PROP_CONST
15067 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
15068 high
.data
.const_val
|= negative_mask
;
15070 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
);
15072 if (high_bound_is_count
)
15073 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
15075 /* Ada expects an empty array on no boundary attributes. */
15076 if (attr
== NULL
&& cu
->language
!= language_ada
)
15077 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
15079 name
= dwarf2_name (die
, cu
);
15081 TYPE_NAME (range_type
) = name
;
15083 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15085 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
15087 set_die_type (die
, range_type
, cu
);
15089 /* set_die_type should be already done. */
15090 set_descriptive_type (range_type
, die
, cu
);
15095 static struct type
*
15096 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15100 /* For now, we only support the C meaning of an unspecified type: void. */
15102 type
= init_type (cu
->objfile
, TYPE_CODE_VOID
, 0, NULL
);
15103 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
15105 return set_die_type (die
, type
, cu
);
15108 /* Read a single die and all its descendents. Set the die's sibling
15109 field to NULL; set other fields in the die correctly, and set all
15110 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
15111 location of the info_ptr after reading all of those dies. PARENT
15112 is the parent of the die in question. */
15114 static struct die_info
*
15115 read_die_and_children (const struct die_reader_specs
*reader
,
15116 const gdb_byte
*info_ptr
,
15117 const gdb_byte
**new_info_ptr
,
15118 struct die_info
*parent
)
15120 struct die_info
*die
;
15121 const gdb_byte
*cur_ptr
;
15124 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
15127 *new_info_ptr
= cur_ptr
;
15130 store_in_ref_table (die
, reader
->cu
);
15133 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
15137 *new_info_ptr
= cur_ptr
;
15140 die
->sibling
= NULL
;
15141 die
->parent
= parent
;
15145 /* Read a die, all of its descendents, and all of its siblings; set
15146 all of the fields of all of the dies correctly. Arguments are as
15147 in read_die_and_children. */
15149 static struct die_info
*
15150 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
15151 const gdb_byte
*info_ptr
,
15152 const gdb_byte
**new_info_ptr
,
15153 struct die_info
*parent
)
15155 struct die_info
*first_die
, *last_sibling
;
15156 const gdb_byte
*cur_ptr
;
15158 cur_ptr
= info_ptr
;
15159 first_die
= last_sibling
= NULL
;
15163 struct die_info
*die
15164 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
15168 *new_info_ptr
= cur_ptr
;
15175 last_sibling
->sibling
= die
;
15177 last_sibling
= die
;
15181 /* Read a die, all of its descendents, and all of its siblings; set
15182 all of the fields of all of the dies correctly. Arguments are as
15183 in read_die_and_children.
15184 This the main entry point for reading a DIE and all its children. */
15186 static struct die_info
*
15187 read_die_and_siblings (const struct die_reader_specs
*reader
,
15188 const gdb_byte
*info_ptr
,
15189 const gdb_byte
**new_info_ptr
,
15190 struct die_info
*parent
)
15192 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
15193 new_info_ptr
, parent
);
15195 if (dwarf_die_debug
)
15197 fprintf_unfiltered (gdb_stdlog
,
15198 "Read die from %s@0x%x of %s:\n",
15199 get_section_name (reader
->die_section
),
15200 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
15201 bfd_get_filename (reader
->abfd
));
15202 dump_die (die
, dwarf_die_debug
);
15208 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
15210 The caller is responsible for filling in the extra attributes
15211 and updating (*DIEP)->num_attrs.
15212 Set DIEP to point to a newly allocated die with its information,
15213 except for its child, sibling, and parent fields.
15214 Set HAS_CHILDREN to tell whether the die has children or not. */
15216 static const gdb_byte
*
15217 read_full_die_1 (const struct die_reader_specs
*reader
,
15218 struct die_info
**diep
, const gdb_byte
*info_ptr
,
15219 int *has_children
, int num_extra_attrs
)
15221 unsigned int abbrev_number
, bytes_read
, i
;
15222 sect_offset offset
;
15223 struct abbrev_info
*abbrev
;
15224 struct die_info
*die
;
15225 struct dwarf2_cu
*cu
= reader
->cu
;
15226 bfd
*abfd
= reader
->abfd
;
15228 offset
.sect_off
= info_ptr
- reader
->buffer
;
15229 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
15230 info_ptr
+= bytes_read
;
15231 if (!abbrev_number
)
15238 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
15240 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
15242 bfd_get_filename (abfd
));
15244 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
15245 die
->offset
= offset
;
15246 die
->tag
= abbrev
->tag
;
15247 die
->abbrev
= abbrev_number
;
15249 /* Make the result usable.
15250 The caller needs to update num_attrs after adding the extra
15252 die
->num_attrs
= abbrev
->num_attrs
;
15254 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
15255 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
15259 *has_children
= abbrev
->has_children
;
15263 /* Read a die and all its attributes.
15264 Set DIEP to point to a newly allocated die with its information,
15265 except for its child, sibling, and parent fields.
15266 Set HAS_CHILDREN to tell whether the die has children or not. */
15268 static const gdb_byte
*
15269 read_full_die (const struct die_reader_specs
*reader
,
15270 struct die_info
**diep
, const gdb_byte
*info_ptr
,
15273 const gdb_byte
*result
;
15275 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
15277 if (dwarf_die_debug
)
15279 fprintf_unfiltered (gdb_stdlog
,
15280 "Read die from %s@0x%x of %s:\n",
15281 get_section_name (reader
->die_section
),
15282 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
15283 bfd_get_filename (reader
->abfd
));
15284 dump_die (*diep
, dwarf_die_debug
);
15290 /* Abbreviation tables.
15292 In DWARF version 2, the description of the debugging information is
15293 stored in a separate .debug_abbrev section. Before we read any
15294 dies from a section we read in all abbreviations and install them
15295 in a hash table. */
15297 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
15299 static struct abbrev_info
*
15300 abbrev_table_alloc_abbrev (struct abbrev_table
*abbrev_table
)
15302 struct abbrev_info
*abbrev
;
15304 abbrev
= XOBNEW (&abbrev_table
->abbrev_obstack
, struct abbrev_info
);
15305 memset (abbrev
, 0, sizeof (struct abbrev_info
));
15310 /* Add an abbreviation to the table. */
15313 abbrev_table_add_abbrev (struct abbrev_table
*abbrev_table
,
15314 unsigned int abbrev_number
,
15315 struct abbrev_info
*abbrev
)
15317 unsigned int hash_number
;
15319 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15320 abbrev
->next
= abbrev_table
->abbrevs
[hash_number
];
15321 abbrev_table
->abbrevs
[hash_number
] = abbrev
;
15324 /* Look up an abbrev in the table.
15325 Returns NULL if the abbrev is not found. */
15327 static struct abbrev_info
*
15328 abbrev_table_lookup_abbrev (const struct abbrev_table
*abbrev_table
,
15329 unsigned int abbrev_number
)
15331 unsigned int hash_number
;
15332 struct abbrev_info
*abbrev
;
15334 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15335 abbrev
= abbrev_table
->abbrevs
[hash_number
];
15339 if (abbrev
->number
== abbrev_number
)
15341 abbrev
= abbrev
->next
;
15346 /* Read in an abbrev table. */
15348 static struct abbrev_table
*
15349 abbrev_table_read_table (struct dwarf2_section_info
*section
,
15350 sect_offset offset
)
15352 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
15353 bfd
*abfd
= get_section_bfd_owner (section
);
15354 struct abbrev_table
*abbrev_table
;
15355 const gdb_byte
*abbrev_ptr
;
15356 struct abbrev_info
*cur_abbrev
;
15357 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
15358 unsigned int abbrev_form
;
15359 struct attr_abbrev
*cur_attrs
;
15360 unsigned int allocated_attrs
;
15362 abbrev_table
= XNEW (struct abbrev_table
);
15363 abbrev_table
->offset
= offset
;
15364 obstack_init (&abbrev_table
->abbrev_obstack
);
15365 abbrev_table
->abbrevs
=
15366 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct abbrev_info
*,
15368 memset (abbrev_table
->abbrevs
, 0,
15369 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
15371 dwarf2_read_section (objfile
, section
);
15372 abbrev_ptr
= section
->buffer
+ offset
.sect_off
;
15373 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15374 abbrev_ptr
+= bytes_read
;
15376 allocated_attrs
= ATTR_ALLOC_CHUNK
;
15377 cur_attrs
= XNEWVEC (struct attr_abbrev
, allocated_attrs
);
15379 /* Loop until we reach an abbrev number of 0. */
15380 while (abbrev_number
)
15382 cur_abbrev
= abbrev_table_alloc_abbrev (abbrev_table
);
15384 /* read in abbrev header */
15385 cur_abbrev
->number
= abbrev_number
;
15387 = (enum dwarf_tag
) read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15388 abbrev_ptr
+= bytes_read
;
15389 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
15392 /* now read in declarations */
15393 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15394 abbrev_ptr
+= bytes_read
;
15395 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15396 abbrev_ptr
+= bytes_read
;
15397 while (abbrev_name
)
15399 if (cur_abbrev
->num_attrs
== allocated_attrs
)
15401 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
15403 = XRESIZEVEC (struct attr_abbrev
, cur_attrs
, allocated_attrs
);
15406 cur_attrs
[cur_abbrev
->num_attrs
].name
15407 = (enum dwarf_attribute
) abbrev_name
;
15408 cur_attrs
[cur_abbrev
->num_attrs
++].form
15409 = (enum dwarf_form
) abbrev_form
;
15410 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15411 abbrev_ptr
+= bytes_read
;
15412 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15413 abbrev_ptr
+= bytes_read
;
15416 cur_abbrev
->attrs
=
15417 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct attr_abbrev
,
15418 cur_abbrev
->num_attrs
);
15419 memcpy (cur_abbrev
->attrs
, cur_attrs
,
15420 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
15422 abbrev_table_add_abbrev (abbrev_table
, abbrev_number
, cur_abbrev
);
15424 /* Get next abbreviation.
15425 Under Irix6 the abbreviations for a compilation unit are not
15426 always properly terminated with an abbrev number of 0.
15427 Exit loop if we encounter an abbreviation which we have
15428 already read (which means we are about to read the abbreviations
15429 for the next compile unit) or if the end of the abbreviation
15430 table is reached. */
15431 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
15433 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15434 abbrev_ptr
+= bytes_read
;
15435 if (abbrev_table_lookup_abbrev (abbrev_table
, abbrev_number
) != NULL
)
15440 return abbrev_table
;
15443 /* Free the resources held by ABBREV_TABLE. */
15446 abbrev_table_free (struct abbrev_table
*abbrev_table
)
15448 obstack_free (&abbrev_table
->abbrev_obstack
, NULL
);
15449 xfree (abbrev_table
);
15452 /* Same as abbrev_table_free but as a cleanup.
15453 We pass in a pointer to the pointer to the table so that we can
15454 set the pointer to NULL when we're done. It also simplifies
15455 build_type_psymtabs_1. */
15458 abbrev_table_free_cleanup (void *table_ptr
)
15460 struct abbrev_table
**abbrev_table_ptr
= (struct abbrev_table
**) table_ptr
;
15462 if (*abbrev_table_ptr
!= NULL
)
15463 abbrev_table_free (*abbrev_table_ptr
);
15464 *abbrev_table_ptr
= NULL
;
15467 /* Read the abbrev table for CU from ABBREV_SECTION. */
15470 dwarf2_read_abbrevs (struct dwarf2_cu
*cu
,
15471 struct dwarf2_section_info
*abbrev_section
)
15474 abbrev_table_read_table (abbrev_section
, cu
->header
.abbrev_offset
);
15477 /* Release the memory used by the abbrev table for a compilation unit. */
15480 dwarf2_free_abbrev_table (void *ptr_to_cu
)
15482 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr_to_cu
;
15484 if (cu
->abbrev_table
!= NULL
)
15485 abbrev_table_free (cu
->abbrev_table
);
15486 /* Set this to NULL so that we SEGV if we try to read it later,
15487 and also because free_comp_unit verifies this is NULL. */
15488 cu
->abbrev_table
= NULL
;
15491 /* Returns nonzero if TAG represents a type that we might generate a partial
15495 is_type_tag_for_partial (int tag
)
15500 /* Some types that would be reasonable to generate partial symbols for,
15501 that we don't at present. */
15502 case DW_TAG_array_type
:
15503 case DW_TAG_file_type
:
15504 case DW_TAG_ptr_to_member_type
:
15505 case DW_TAG_set_type
:
15506 case DW_TAG_string_type
:
15507 case DW_TAG_subroutine_type
:
15509 case DW_TAG_base_type
:
15510 case DW_TAG_class_type
:
15511 case DW_TAG_interface_type
:
15512 case DW_TAG_enumeration_type
:
15513 case DW_TAG_structure_type
:
15514 case DW_TAG_subrange_type
:
15515 case DW_TAG_typedef
:
15516 case DW_TAG_union_type
:
15523 /* Load all DIEs that are interesting for partial symbols into memory. */
15525 static struct partial_die_info
*
15526 load_partial_dies (const struct die_reader_specs
*reader
,
15527 const gdb_byte
*info_ptr
, int building_psymtab
)
15529 struct dwarf2_cu
*cu
= reader
->cu
;
15530 struct objfile
*objfile
= cu
->objfile
;
15531 struct partial_die_info
*part_die
;
15532 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
15533 struct abbrev_info
*abbrev
;
15534 unsigned int bytes_read
;
15535 unsigned int load_all
= 0;
15536 int nesting_level
= 1;
15541 gdb_assert (cu
->per_cu
!= NULL
);
15542 if (cu
->per_cu
->load_all_dies
)
15546 = htab_create_alloc_ex (cu
->header
.length
/ 12,
15550 &cu
->comp_unit_obstack
,
15551 hashtab_obstack_allocate
,
15552 dummy_obstack_deallocate
);
15554 part_die
= XOBNEW (&cu
->comp_unit_obstack
, struct partial_die_info
);
15558 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
15560 /* A NULL abbrev means the end of a series of children. */
15561 if (abbrev
== NULL
)
15563 if (--nesting_level
== 0)
15565 /* PART_DIE was probably the last thing allocated on the
15566 comp_unit_obstack, so we could call obstack_free
15567 here. We don't do that because the waste is small,
15568 and will be cleaned up when we're done with this
15569 compilation unit. This way, we're also more robust
15570 against other users of the comp_unit_obstack. */
15573 info_ptr
+= bytes_read
;
15574 last_die
= parent_die
;
15575 parent_die
= parent_die
->die_parent
;
15579 /* Check for template arguments. We never save these; if
15580 they're seen, we just mark the parent, and go on our way. */
15581 if (parent_die
!= NULL
15582 && cu
->language
== language_cplus
15583 && (abbrev
->tag
== DW_TAG_template_type_param
15584 || abbrev
->tag
== DW_TAG_template_value_param
))
15586 parent_die
->has_template_arguments
= 1;
15590 /* We don't need a partial DIE for the template argument. */
15591 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15596 /* We only recurse into c++ subprograms looking for template arguments.
15597 Skip their other children. */
15599 && cu
->language
== language_cplus
15600 && parent_die
!= NULL
15601 && parent_die
->tag
== DW_TAG_subprogram
)
15603 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15607 /* Check whether this DIE is interesting enough to save. Normally
15608 we would not be interested in members here, but there may be
15609 later variables referencing them via DW_AT_specification (for
15610 static members). */
15612 && !is_type_tag_for_partial (abbrev
->tag
)
15613 && abbrev
->tag
!= DW_TAG_constant
15614 && abbrev
->tag
!= DW_TAG_enumerator
15615 && abbrev
->tag
!= DW_TAG_subprogram
15616 && abbrev
->tag
!= DW_TAG_lexical_block
15617 && abbrev
->tag
!= DW_TAG_variable
15618 && abbrev
->tag
!= DW_TAG_namespace
15619 && abbrev
->tag
!= DW_TAG_module
15620 && abbrev
->tag
!= DW_TAG_member
15621 && abbrev
->tag
!= DW_TAG_imported_unit
15622 && abbrev
->tag
!= DW_TAG_imported_declaration
)
15624 /* Otherwise we skip to the next sibling, if any. */
15625 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15629 info_ptr
= read_partial_die (reader
, part_die
, abbrev
, bytes_read
,
15632 /* This two-pass algorithm for processing partial symbols has a
15633 high cost in cache pressure. Thus, handle some simple cases
15634 here which cover the majority of C partial symbols. DIEs
15635 which neither have specification tags in them, nor could have
15636 specification tags elsewhere pointing at them, can simply be
15637 processed and discarded.
15639 This segment is also optional; scan_partial_symbols and
15640 add_partial_symbol will handle these DIEs if we chain
15641 them in normally. When compilers which do not emit large
15642 quantities of duplicate debug information are more common,
15643 this code can probably be removed. */
15645 /* Any complete simple types at the top level (pretty much all
15646 of them, for a language without namespaces), can be processed
15648 if (parent_die
== NULL
15649 && part_die
->has_specification
== 0
15650 && part_die
->is_declaration
== 0
15651 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
15652 || part_die
->tag
== DW_TAG_base_type
15653 || part_die
->tag
== DW_TAG_subrange_type
))
15655 if (building_psymtab
&& part_die
->name
!= NULL
)
15656 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
15657 VAR_DOMAIN
, LOC_TYPEDEF
,
15658 &objfile
->static_psymbols
,
15659 0, cu
->language
, objfile
);
15660 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
15664 /* The exception for DW_TAG_typedef with has_children above is
15665 a workaround of GCC PR debug/47510. In the case of this complaint
15666 type_name_no_tag_or_error will error on such types later.
15668 GDB skipped children of DW_TAG_typedef by the shortcut above and then
15669 it could not find the child DIEs referenced later, this is checked
15670 above. In correct DWARF DW_TAG_typedef should have no children. */
15672 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
15673 complaint (&symfile_complaints
,
15674 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
15675 "- DIE at 0x%x [in module %s]"),
15676 part_die
->offset
.sect_off
, objfile_name (objfile
));
15678 /* If we're at the second level, and we're an enumerator, and
15679 our parent has no specification (meaning possibly lives in a
15680 namespace elsewhere), then we can add the partial symbol now
15681 instead of queueing it. */
15682 if (part_die
->tag
== DW_TAG_enumerator
15683 && parent_die
!= NULL
15684 && parent_die
->die_parent
== NULL
15685 && parent_die
->tag
== DW_TAG_enumeration_type
15686 && parent_die
->has_specification
== 0)
15688 if (part_die
->name
== NULL
)
15689 complaint (&symfile_complaints
,
15690 _("malformed enumerator DIE ignored"));
15691 else if (building_psymtab
)
15692 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
15693 VAR_DOMAIN
, LOC_CONST
,
15694 cu
->language
== language_cplus
15695 ? &objfile
->global_psymbols
15696 : &objfile
->static_psymbols
,
15697 0, cu
->language
, objfile
);
15699 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
15703 /* We'll save this DIE so link it in. */
15704 part_die
->die_parent
= parent_die
;
15705 part_die
->die_sibling
= NULL
;
15706 part_die
->die_child
= NULL
;
15708 if (last_die
&& last_die
== parent_die
)
15709 last_die
->die_child
= part_die
;
15711 last_die
->die_sibling
= part_die
;
15713 last_die
= part_die
;
15715 if (first_die
== NULL
)
15716 first_die
= part_die
;
15718 /* Maybe add the DIE to the hash table. Not all DIEs that we
15719 find interesting need to be in the hash table, because we
15720 also have the parent/sibling/child chains; only those that we
15721 might refer to by offset later during partial symbol reading.
15723 For now this means things that might have be the target of a
15724 DW_AT_specification, DW_AT_abstract_origin, or
15725 DW_AT_extension. DW_AT_extension will refer only to
15726 namespaces; DW_AT_abstract_origin refers to functions (and
15727 many things under the function DIE, but we do not recurse
15728 into function DIEs during partial symbol reading) and
15729 possibly variables as well; DW_AT_specification refers to
15730 declarations. Declarations ought to have the DW_AT_declaration
15731 flag. It happens that GCC forgets to put it in sometimes, but
15732 only for functions, not for types.
15734 Adding more things than necessary to the hash table is harmless
15735 except for the performance cost. Adding too few will result in
15736 wasted time in find_partial_die, when we reread the compilation
15737 unit with load_all_dies set. */
15740 || abbrev
->tag
== DW_TAG_constant
15741 || abbrev
->tag
== DW_TAG_subprogram
15742 || abbrev
->tag
== DW_TAG_variable
15743 || abbrev
->tag
== DW_TAG_namespace
15744 || part_die
->is_declaration
)
15748 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
15749 part_die
->offset
.sect_off
, INSERT
);
15753 part_die
= XOBNEW (&cu
->comp_unit_obstack
, struct partial_die_info
);
15755 /* For some DIEs we want to follow their children (if any). For C
15756 we have no reason to follow the children of structures; for other
15757 languages we have to, so that we can get at method physnames
15758 to infer fully qualified class names, for DW_AT_specification,
15759 and for C++ template arguments. For C++, we also look one level
15760 inside functions to find template arguments (if the name of the
15761 function does not already contain the template arguments).
15763 For Ada, we need to scan the children of subprograms and lexical
15764 blocks as well because Ada allows the definition of nested
15765 entities that could be interesting for the debugger, such as
15766 nested subprograms for instance. */
15767 if (last_die
->has_children
15769 || last_die
->tag
== DW_TAG_namespace
15770 || last_die
->tag
== DW_TAG_module
15771 || last_die
->tag
== DW_TAG_enumeration_type
15772 || (cu
->language
== language_cplus
15773 && last_die
->tag
== DW_TAG_subprogram
15774 && (last_die
->name
== NULL
15775 || strchr (last_die
->name
, '<') == NULL
))
15776 || (cu
->language
!= language_c
15777 && (last_die
->tag
== DW_TAG_class_type
15778 || last_die
->tag
== DW_TAG_interface_type
15779 || last_die
->tag
== DW_TAG_structure_type
15780 || last_die
->tag
== DW_TAG_union_type
))
15781 || (cu
->language
== language_ada
15782 && (last_die
->tag
== DW_TAG_subprogram
15783 || last_die
->tag
== DW_TAG_lexical_block
))))
15786 parent_die
= last_die
;
15790 /* Otherwise we skip to the next sibling, if any. */
15791 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
15793 /* Back to the top, do it again. */
15797 /* Read a minimal amount of information into the minimal die structure. */
15799 static const gdb_byte
*
15800 read_partial_die (const struct die_reader_specs
*reader
,
15801 struct partial_die_info
*part_die
,
15802 struct abbrev_info
*abbrev
, unsigned int abbrev_len
,
15803 const gdb_byte
*info_ptr
)
15805 struct dwarf2_cu
*cu
= reader
->cu
;
15806 struct objfile
*objfile
= cu
->objfile
;
15807 const gdb_byte
*buffer
= reader
->buffer
;
15809 struct attribute attr
;
15810 int has_low_pc_attr
= 0;
15811 int has_high_pc_attr
= 0;
15812 int high_pc_relative
= 0;
15814 memset (part_die
, 0, sizeof (struct partial_die_info
));
15816 part_die
->offset
.sect_off
= info_ptr
- buffer
;
15818 info_ptr
+= abbrev_len
;
15820 if (abbrev
== NULL
)
15823 part_die
->tag
= abbrev
->tag
;
15824 part_die
->has_children
= abbrev
->has_children
;
15826 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
15828 info_ptr
= read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
15830 /* Store the data if it is of an attribute we want to keep in a
15831 partial symbol table. */
15835 switch (part_die
->tag
)
15837 case DW_TAG_compile_unit
:
15838 case DW_TAG_partial_unit
:
15839 case DW_TAG_type_unit
:
15840 /* Compilation units have a DW_AT_name that is a filename, not
15841 a source language identifier. */
15842 case DW_TAG_enumeration_type
:
15843 case DW_TAG_enumerator
:
15844 /* These tags always have simple identifiers already; no need
15845 to canonicalize them. */
15846 part_die
->name
= DW_STRING (&attr
);
15850 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
15851 &objfile
->per_bfd
->storage_obstack
);
15855 case DW_AT_linkage_name
:
15856 case DW_AT_MIPS_linkage_name
:
15857 /* Note that both forms of linkage name might appear. We
15858 assume they will be the same, and we only store the last
15860 if (cu
->language
== language_ada
)
15861 part_die
->name
= DW_STRING (&attr
);
15862 part_die
->linkage_name
= DW_STRING (&attr
);
15865 has_low_pc_attr
= 1;
15866 part_die
->lowpc
= attr_value_as_address (&attr
);
15868 case DW_AT_high_pc
:
15869 has_high_pc_attr
= 1;
15870 part_die
->highpc
= attr_value_as_address (&attr
);
15871 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
15872 high_pc_relative
= 1;
15874 case DW_AT_location
:
15875 /* Support the .debug_loc offsets. */
15876 if (attr_form_is_block (&attr
))
15878 part_die
->d
.locdesc
= DW_BLOCK (&attr
);
15880 else if (attr_form_is_section_offset (&attr
))
15882 dwarf2_complex_location_expr_complaint ();
15886 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
15887 "partial symbol information");
15890 case DW_AT_external
:
15891 part_die
->is_external
= DW_UNSND (&attr
);
15893 case DW_AT_declaration
:
15894 part_die
->is_declaration
= DW_UNSND (&attr
);
15897 part_die
->has_type
= 1;
15899 case DW_AT_abstract_origin
:
15900 case DW_AT_specification
:
15901 case DW_AT_extension
:
15902 part_die
->has_specification
= 1;
15903 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
15904 part_die
->spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
15905 || cu
->per_cu
->is_dwz
);
15907 case DW_AT_sibling
:
15908 /* Ignore absolute siblings, they might point outside of
15909 the current compile unit. */
15910 if (attr
.form
== DW_FORM_ref_addr
)
15911 complaint (&symfile_complaints
,
15912 _("ignoring absolute DW_AT_sibling"));
15915 unsigned int off
= dwarf2_get_ref_die_offset (&attr
).sect_off
;
15916 const gdb_byte
*sibling_ptr
= buffer
+ off
;
15918 if (sibling_ptr
< info_ptr
)
15919 complaint (&symfile_complaints
,
15920 _("DW_AT_sibling points backwards"));
15921 else if (sibling_ptr
> reader
->buffer_end
)
15922 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
15924 part_die
->sibling
= sibling_ptr
;
15927 case DW_AT_byte_size
:
15928 part_die
->has_byte_size
= 1;
15930 case DW_AT_const_value
:
15931 part_die
->has_const_value
= 1;
15933 case DW_AT_calling_convention
:
15934 /* DWARF doesn't provide a way to identify a program's source-level
15935 entry point. DW_AT_calling_convention attributes are only meant
15936 to describe functions' calling conventions.
15938 However, because it's a necessary piece of information in
15939 Fortran, and before DWARF 4 DW_CC_program was the only
15940 piece of debugging information whose definition refers to
15941 a 'main program' at all, several compilers marked Fortran
15942 main programs with DW_CC_program --- even when those
15943 functions use the standard calling conventions.
15945 Although DWARF now specifies a way to provide this
15946 information, we support this practice for backward
15948 if (DW_UNSND (&attr
) == DW_CC_program
15949 && cu
->language
== language_fortran
)
15950 part_die
->main_subprogram
= 1;
15953 if (DW_UNSND (&attr
) == DW_INL_inlined
15954 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
15955 part_die
->may_be_inlined
= 1;
15959 if (part_die
->tag
== DW_TAG_imported_unit
)
15961 part_die
->d
.offset
= dwarf2_get_ref_die_offset (&attr
);
15962 part_die
->is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
15963 || cu
->per_cu
->is_dwz
);
15967 case DW_AT_main_subprogram
:
15968 part_die
->main_subprogram
= DW_UNSND (&attr
);
15976 if (high_pc_relative
)
15977 part_die
->highpc
+= part_die
->lowpc
;
15979 if (has_low_pc_attr
&& has_high_pc_attr
)
15981 /* When using the GNU linker, .gnu.linkonce. sections are used to
15982 eliminate duplicate copies of functions and vtables and such.
15983 The linker will arbitrarily choose one and discard the others.
15984 The AT_*_pc values for such functions refer to local labels in
15985 these sections. If the section from that file was discarded, the
15986 labels are not in the output, so the relocs get a value of 0.
15987 If this is a discarded function, mark the pc bounds as invalid,
15988 so that GDB will ignore it. */
15989 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
15991 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15993 complaint (&symfile_complaints
,
15994 _("DW_AT_low_pc %s is zero "
15995 "for DIE at 0x%x [in module %s]"),
15996 paddress (gdbarch
, part_die
->lowpc
),
15997 part_die
->offset
.sect_off
, objfile_name (objfile
));
15999 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
16000 else if (part_die
->lowpc
>= part_die
->highpc
)
16002 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
16004 complaint (&symfile_complaints
,
16005 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
16006 "for DIE at 0x%x [in module %s]"),
16007 paddress (gdbarch
, part_die
->lowpc
),
16008 paddress (gdbarch
, part_die
->highpc
),
16009 part_die
->offset
.sect_off
, objfile_name (objfile
));
16012 part_die
->has_pc_info
= 1;
16018 /* Find a cached partial DIE at OFFSET in CU. */
16020 static struct partial_die_info
*
16021 find_partial_die_in_comp_unit (sect_offset offset
, struct dwarf2_cu
*cu
)
16023 struct partial_die_info
*lookup_die
= NULL
;
16024 struct partial_die_info part_die
;
16026 part_die
.offset
= offset
;
16027 lookup_die
= ((struct partial_die_info
*)
16028 htab_find_with_hash (cu
->partial_dies
, &part_die
,
16034 /* Find a partial DIE at OFFSET, which may or may not be in CU,
16035 except in the case of .debug_types DIEs which do not reference
16036 outside their CU (they do however referencing other types via
16037 DW_FORM_ref_sig8). */
16039 static struct partial_die_info
*
16040 find_partial_die (sect_offset offset
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
16042 struct objfile
*objfile
= cu
->objfile
;
16043 struct dwarf2_per_cu_data
*per_cu
= NULL
;
16044 struct partial_die_info
*pd
= NULL
;
16046 if (offset_in_dwz
== cu
->per_cu
->is_dwz
16047 && offset_in_cu_p (&cu
->header
, offset
))
16049 pd
= find_partial_die_in_comp_unit (offset
, cu
);
16052 /* We missed recording what we needed.
16053 Load all dies and try again. */
16054 per_cu
= cu
->per_cu
;
16058 /* TUs don't reference other CUs/TUs (except via type signatures). */
16059 if (cu
->per_cu
->is_debug_types
)
16061 error (_("Dwarf Error: Type Unit at offset 0x%lx contains"
16062 " external reference to offset 0x%lx [in module %s].\n"),
16063 (long) cu
->header
.offset
.sect_off
, (long) offset
.sect_off
,
16064 bfd_get_filename (objfile
->obfd
));
16066 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
16069 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
16070 load_partial_comp_unit (per_cu
);
16072 per_cu
->cu
->last_used
= 0;
16073 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
16076 /* If we didn't find it, and not all dies have been loaded,
16077 load them all and try again. */
16079 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
16081 per_cu
->load_all_dies
= 1;
16083 /* This is nasty. When we reread the DIEs, somewhere up the call chain
16084 THIS_CU->cu may already be in use. So we can't just free it and
16085 replace its DIEs with the ones we read in. Instead, we leave those
16086 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
16087 and clobber THIS_CU->cu->partial_dies with the hash table for the new
16089 load_partial_comp_unit (per_cu
);
16091 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
16095 internal_error (__FILE__
, __LINE__
,
16096 _("could not find partial DIE 0x%x "
16097 "in cache [from module %s]\n"),
16098 offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
16102 /* See if we can figure out if the class lives in a namespace. We do
16103 this by looking for a member function; its demangled name will
16104 contain namespace info, if there is any. */
16107 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
16108 struct dwarf2_cu
*cu
)
16110 /* NOTE: carlton/2003-10-07: Getting the info this way changes
16111 what template types look like, because the demangler
16112 frequently doesn't give the same name as the debug info. We
16113 could fix this by only using the demangled name to get the
16114 prefix (but see comment in read_structure_type). */
16116 struct partial_die_info
*real_pdi
;
16117 struct partial_die_info
*child_pdi
;
16119 /* If this DIE (this DIE's specification, if any) has a parent, then
16120 we should not do this. We'll prepend the parent's fully qualified
16121 name when we create the partial symbol. */
16123 real_pdi
= struct_pdi
;
16124 while (real_pdi
->has_specification
)
16125 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
16126 real_pdi
->spec_is_dwz
, cu
);
16128 if (real_pdi
->die_parent
!= NULL
)
16131 for (child_pdi
= struct_pdi
->die_child
;
16133 child_pdi
= child_pdi
->die_sibling
)
16135 if (child_pdi
->tag
== DW_TAG_subprogram
16136 && child_pdi
->linkage_name
!= NULL
)
16138 char *actual_class_name
16139 = language_class_name_from_physname (cu
->language_defn
,
16140 child_pdi
->linkage_name
);
16141 if (actual_class_name
!= NULL
)
16145 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
16147 strlen (actual_class_name
)));
16148 xfree (actual_class_name
);
16155 /* Adjust PART_DIE before generating a symbol for it. This function
16156 may set the is_external flag or change the DIE's name. */
16159 fixup_partial_die (struct partial_die_info
*part_die
,
16160 struct dwarf2_cu
*cu
)
16162 /* Once we've fixed up a die, there's no point in doing so again.
16163 This also avoids a memory leak if we were to call
16164 guess_partial_die_structure_name multiple times. */
16165 if (part_die
->fixup_called
)
16168 /* If we found a reference attribute and the DIE has no name, try
16169 to find a name in the referred to DIE. */
16171 if (part_die
->name
== NULL
&& part_die
->has_specification
)
16173 struct partial_die_info
*spec_die
;
16175 spec_die
= find_partial_die (part_die
->spec_offset
,
16176 part_die
->spec_is_dwz
, cu
);
16178 fixup_partial_die (spec_die
, cu
);
16180 if (spec_die
->name
)
16182 part_die
->name
= spec_die
->name
;
16184 /* Copy DW_AT_external attribute if it is set. */
16185 if (spec_die
->is_external
)
16186 part_die
->is_external
= spec_die
->is_external
;
16190 /* Set default names for some unnamed DIEs. */
16192 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
16193 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
16195 /* If there is no parent die to provide a namespace, and there are
16196 children, see if we can determine the namespace from their linkage
16198 if (cu
->language
== language_cplus
16199 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
16200 && part_die
->die_parent
== NULL
16201 && part_die
->has_children
16202 && (part_die
->tag
== DW_TAG_class_type
16203 || part_die
->tag
== DW_TAG_structure_type
16204 || part_die
->tag
== DW_TAG_union_type
))
16205 guess_partial_die_structure_name (part_die
, cu
);
16207 /* GCC might emit a nameless struct or union that has a linkage
16208 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
16209 if (part_die
->name
== NULL
16210 && (part_die
->tag
== DW_TAG_class_type
16211 || part_die
->tag
== DW_TAG_interface_type
16212 || part_die
->tag
== DW_TAG_structure_type
16213 || part_die
->tag
== DW_TAG_union_type
)
16214 && part_die
->linkage_name
!= NULL
)
16218 demangled
= gdb_demangle (part_die
->linkage_name
, DMGL_TYPES
);
16223 /* Strip any leading namespaces/classes, keep only the base name.
16224 DW_AT_name for named DIEs does not contain the prefixes. */
16225 base
= strrchr (demangled
, ':');
16226 if (base
&& base
> demangled
&& base
[-1] == ':')
16233 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
16234 base
, strlen (base
)));
16239 part_die
->fixup_called
= 1;
16242 /* Read an attribute value described by an attribute form. */
16244 static const gdb_byte
*
16245 read_attribute_value (const struct die_reader_specs
*reader
,
16246 struct attribute
*attr
, unsigned form
,
16247 const gdb_byte
*info_ptr
)
16249 struct dwarf2_cu
*cu
= reader
->cu
;
16250 struct objfile
*objfile
= cu
->objfile
;
16251 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
16252 bfd
*abfd
= reader
->abfd
;
16253 struct comp_unit_head
*cu_header
= &cu
->header
;
16254 unsigned int bytes_read
;
16255 struct dwarf_block
*blk
;
16257 attr
->form
= (enum dwarf_form
) form
;
16260 case DW_FORM_ref_addr
:
16261 if (cu
->header
.version
== 2)
16262 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
16264 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
16265 &cu
->header
, &bytes_read
);
16266 info_ptr
+= bytes_read
;
16268 case DW_FORM_GNU_ref_alt
:
16269 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
16270 info_ptr
+= bytes_read
;
16273 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
16274 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
16275 info_ptr
+= bytes_read
;
16277 case DW_FORM_block2
:
16278 blk
= dwarf_alloc_block (cu
);
16279 blk
->size
= read_2_bytes (abfd
, info_ptr
);
16281 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16282 info_ptr
+= blk
->size
;
16283 DW_BLOCK (attr
) = blk
;
16285 case DW_FORM_block4
:
16286 blk
= dwarf_alloc_block (cu
);
16287 blk
->size
= read_4_bytes (abfd
, info_ptr
);
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_data2
:
16294 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
16297 case DW_FORM_data4
:
16298 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
16301 case DW_FORM_data8
:
16302 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
16305 case DW_FORM_sec_offset
:
16306 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
16307 info_ptr
+= bytes_read
;
16309 case DW_FORM_string
:
16310 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
16311 DW_STRING_IS_CANONICAL (attr
) = 0;
16312 info_ptr
+= bytes_read
;
16315 if (!cu
->per_cu
->is_dwz
)
16317 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
16319 DW_STRING_IS_CANONICAL (attr
) = 0;
16320 info_ptr
+= bytes_read
;
16324 case DW_FORM_GNU_strp_alt
:
16326 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
16327 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
16330 DW_STRING (attr
) = read_indirect_string_from_dwz (dwz
, str_offset
);
16331 DW_STRING_IS_CANONICAL (attr
) = 0;
16332 info_ptr
+= bytes_read
;
16335 case DW_FORM_exprloc
:
16336 case DW_FORM_block
:
16337 blk
= dwarf_alloc_block (cu
);
16338 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16339 info_ptr
+= bytes_read
;
16340 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16341 info_ptr
+= blk
->size
;
16342 DW_BLOCK (attr
) = blk
;
16344 case DW_FORM_block1
:
16345 blk
= dwarf_alloc_block (cu
);
16346 blk
->size
= read_1_byte (abfd
, info_ptr
);
16348 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16349 info_ptr
+= blk
->size
;
16350 DW_BLOCK (attr
) = blk
;
16352 case DW_FORM_data1
:
16353 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16357 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16360 case DW_FORM_flag_present
:
16361 DW_UNSND (attr
) = 1;
16363 case DW_FORM_sdata
:
16364 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
16365 info_ptr
+= bytes_read
;
16367 case DW_FORM_udata
:
16368 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16369 info_ptr
+= bytes_read
;
16372 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16373 + read_1_byte (abfd
, info_ptr
));
16377 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16378 + read_2_bytes (abfd
, info_ptr
));
16382 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16383 + read_4_bytes (abfd
, info_ptr
));
16387 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16388 + read_8_bytes (abfd
, info_ptr
));
16391 case DW_FORM_ref_sig8
:
16392 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
16395 case DW_FORM_ref_udata
:
16396 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16397 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
16398 info_ptr
+= bytes_read
;
16400 case DW_FORM_indirect
:
16401 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16402 info_ptr
+= bytes_read
;
16403 info_ptr
= read_attribute_value (reader
, attr
, form
, info_ptr
);
16405 case DW_FORM_GNU_addr_index
:
16406 if (reader
->dwo_file
== NULL
)
16408 /* For now flag a hard error.
16409 Later we can turn this into a complaint. */
16410 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16411 dwarf_form_name (form
),
16412 bfd_get_filename (abfd
));
16414 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
16415 info_ptr
+= bytes_read
;
16417 case DW_FORM_GNU_str_index
:
16418 if (reader
->dwo_file
== NULL
)
16420 /* For now flag a hard error.
16421 Later we can turn this into a complaint if warranted. */
16422 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16423 dwarf_form_name (form
),
16424 bfd_get_filename (abfd
));
16427 ULONGEST str_index
=
16428 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16430 DW_STRING (attr
) = read_str_index (reader
, str_index
);
16431 DW_STRING_IS_CANONICAL (attr
) = 0;
16432 info_ptr
+= bytes_read
;
16436 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
16437 dwarf_form_name (form
),
16438 bfd_get_filename (abfd
));
16442 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
16443 attr
->form
= DW_FORM_GNU_ref_alt
;
16445 /* We have seen instances where the compiler tried to emit a byte
16446 size attribute of -1 which ended up being encoded as an unsigned
16447 0xffffffff. Although 0xffffffff is technically a valid size value,
16448 an object of this size seems pretty unlikely so we can relatively
16449 safely treat these cases as if the size attribute was invalid and
16450 treat them as zero by default. */
16451 if (attr
->name
== DW_AT_byte_size
16452 && form
== DW_FORM_data4
16453 && DW_UNSND (attr
) >= 0xffffffff)
16456 (&symfile_complaints
,
16457 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
16458 hex_string (DW_UNSND (attr
)));
16459 DW_UNSND (attr
) = 0;
16465 /* Read an attribute described by an abbreviated attribute. */
16467 static const gdb_byte
*
16468 read_attribute (const struct die_reader_specs
*reader
,
16469 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
16470 const gdb_byte
*info_ptr
)
16472 attr
->name
= abbrev
->name
;
16473 return read_attribute_value (reader
, attr
, abbrev
->form
, info_ptr
);
16476 /* Read dwarf information from a buffer. */
16478 static unsigned int
16479 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
16481 return bfd_get_8 (abfd
, buf
);
16485 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
16487 return bfd_get_signed_8 (abfd
, buf
);
16490 static unsigned int
16491 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16493 return bfd_get_16 (abfd
, buf
);
16497 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16499 return bfd_get_signed_16 (abfd
, buf
);
16502 static unsigned int
16503 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16505 return bfd_get_32 (abfd
, buf
);
16509 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16511 return bfd_get_signed_32 (abfd
, buf
);
16515 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16517 return bfd_get_64 (abfd
, buf
);
16521 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
16522 unsigned int *bytes_read
)
16524 struct comp_unit_head
*cu_header
= &cu
->header
;
16525 CORE_ADDR retval
= 0;
16527 if (cu_header
->signed_addr_p
)
16529 switch (cu_header
->addr_size
)
16532 retval
= bfd_get_signed_16 (abfd
, buf
);
16535 retval
= bfd_get_signed_32 (abfd
, buf
);
16538 retval
= bfd_get_signed_64 (abfd
, buf
);
16541 internal_error (__FILE__
, __LINE__
,
16542 _("read_address: bad switch, signed [in module %s]"),
16543 bfd_get_filename (abfd
));
16548 switch (cu_header
->addr_size
)
16551 retval
= bfd_get_16 (abfd
, buf
);
16554 retval
= bfd_get_32 (abfd
, buf
);
16557 retval
= bfd_get_64 (abfd
, buf
);
16560 internal_error (__FILE__
, __LINE__
,
16561 _("read_address: bad switch, "
16562 "unsigned [in module %s]"),
16563 bfd_get_filename (abfd
));
16567 *bytes_read
= cu_header
->addr_size
;
16571 /* Read the initial length from a section. The (draft) DWARF 3
16572 specification allows the initial length to take up either 4 bytes
16573 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
16574 bytes describe the length and all offsets will be 8 bytes in length
16577 An older, non-standard 64-bit format is also handled by this
16578 function. The older format in question stores the initial length
16579 as an 8-byte quantity without an escape value. Lengths greater
16580 than 2^32 aren't very common which means that the initial 4 bytes
16581 is almost always zero. Since a length value of zero doesn't make
16582 sense for the 32-bit format, this initial zero can be considered to
16583 be an escape value which indicates the presence of the older 64-bit
16584 format. As written, the code can't detect (old format) lengths
16585 greater than 4GB. If it becomes necessary to handle lengths
16586 somewhat larger than 4GB, we could allow other small values (such
16587 as the non-sensical values of 1, 2, and 3) to also be used as
16588 escape values indicating the presence of the old format.
16590 The value returned via bytes_read should be used to increment the
16591 relevant pointer after calling read_initial_length().
16593 [ Note: read_initial_length() and read_offset() are based on the
16594 document entitled "DWARF Debugging Information Format", revision
16595 3, draft 8, dated November 19, 2001. This document was obtained
16598 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
16600 This document is only a draft and is subject to change. (So beware.)
16602 Details regarding the older, non-standard 64-bit format were
16603 determined empirically by examining 64-bit ELF files produced by
16604 the SGI toolchain on an IRIX 6.5 machine.
16606 - Kevin, July 16, 2002
16610 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
16612 LONGEST length
= bfd_get_32 (abfd
, buf
);
16614 if (length
== 0xffffffff)
16616 length
= bfd_get_64 (abfd
, buf
+ 4);
16619 else if (length
== 0)
16621 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
16622 length
= bfd_get_64 (abfd
, buf
);
16633 /* Cover function for read_initial_length.
16634 Returns the length of the object at BUF, and stores the size of the
16635 initial length in *BYTES_READ and stores the size that offsets will be in
16637 If the initial length size is not equivalent to that specified in
16638 CU_HEADER then issue a complaint.
16639 This is useful when reading non-comp-unit headers. */
16642 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
16643 const struct comp_unit_head
*cu_header
,
16644 unsigned int *bytes_read
,
16645 unsigned int *offset_size
)
16647 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
16649 gdb_assert (cu_header
->initial_length_size
== 4
16650 || cu_header
->initial_length_size
== 8
16651 || cu_header
->initial_length_size
== 12);
16653 if (cu_header
->initial_length_size
!= *bytes_read
)
16654 complaint (&symfile_complaints
,
16655 _("intermixed 32-bit and 64-bit DWARF sections"));
16657 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
16661 /* Read an offset from the data stream. The size of the offset is
16662 given by cu_header->offset_size. */
16665 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
16666 const struct comp_unit_head
*cu_header
,
16667 unsigned int *bytes_read
)
16669 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
16671 *bytes_read
= cu_header
->offset_size
;
16675 /* Read an offset from the data stream. */
16678 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
16680 LONGEST retval
= 0;
16682 switch (offset_size
)
16685 retval
= bfd_get_32 (abfd
, buf
);
16688 retval
= bfd_get_64 (abfd
, buf
);
16691 internal_error (__FILE__
, __LINE__
,
16692 _("read_offset_1: bad switch [in module %s]"),
16693 bfd_get_filename (abfd
));
16699 static const gdb_byte
*
16700 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
16702 /* If the size of a host char is 8 bits, we can return a pointer
16703 to the buffer, otherwise we have to copy the data to a buffer
16704 allocated on the temporary obstack. */
16705 gdb_assert (HOST_CHAR_BIT
== 8);
16709 static const char *
16710 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
16711 unsigned int *bytes_read_ptr
)
16713 /* If the size of a host char is 8 bits, we can return a pointer
16714 to the string, otherwise we have to copy the string to a buffer
16715 allocated on the temporary obstack. */
16716 gdb_assert (HOST_CHAR_BIT
== 8);
16719 *bytes_read_ptr
= 1;
16722 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
16723 return (const char *) buf
;
16726 static const char *
16727 read_indirect_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
16729 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
16730 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
16731 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
16732 bfd_get_filename (abfd
));
16733 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
16734 error (_("DW_FORM_strp pointing outside of "
16735 ".debug_str section [in module %s]"),
16736 bfd_get_filename (abfd
));
16737 gdb_assert (HOST_CHAR_BIT
== 8);
16738 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
16740 return (const char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
16743 /* Read a string at offset STR_OFFSET in the .debug_str section from
16744 the .dwz file DWZ. Throw an error if the offset is too large. If
16745 the string consists of a single NUL byte, return NULL; otherwise
16746 return a pointer to the string. */
16748 static const char *
16749 read_indirect_string_from_dwz (struct dwz_file
*dwz
, LONGEST str_offset
)
16751 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwz
->str
);
16753 if (dwz
->str
.buffer
== NULL
)
16754 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
16755 "section [in module %s]"),
16756 bfd_get_filename (dwz
->dwz_bfd
));
16757 if (str_offset
>= dwz
->str
.size
)
16758 error (_("DW_FORM_GNU_strp_alt pointing outside of "
16759 ".debug_str section [in module %s]"),
16760 bfd_get_filename (dwz
->dwz_bfd
));
16761 gdb_assert (HOST_CHAR_BIT
== 8);
16762 if (dwz
->str
.buffer
[str_offset
] == '\0')
16764 return (const char *) (dwz
->str
.buffer
+ str_offset
);
16767 static const char *
16768 read_indirect_string (bfd
*abfd
, const gdb_byte
*buf
,
16769 const struct comp_unit_head
*cu_header
,
16770 unsigned int *bytes_read_ptr
)
16772 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
16774 return read_indirect_string_at_offset (abfd
, str_offset
);
16778 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
16779 unsigned int *bytes_read_ptr
)
16782 unsigned int num_read
;
16784 unsigned char byte
;
16791 byte
= bfd_get_8 (abfd
, buf
);
16794 result
|= ((ULONGEST
) (byte
& 127) << shift
);
16795 if ((byte
& 128) == 0)
16801 *bytes_read_ptr
= num_read
;
16806 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
16807 unsigned int *bytes_read_ptr
)
16810 int shift
, num_read
;
16811 unsigned char byte
;
16818 byte
= bfd_get_8 (abfd
, buf
);
16821 result
|= ((LONGEST
) (byte
& 127) << shift
);
16823 if ((byte
& 128) == 0)
16828 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
16829 result
|= -(((LONGEST
) 1) << shift
);
16830 *bytes_read_ptr
= num_read
;
16834 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
16835 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
16836 ADDR_SIZE is the size of addresses from the CU header. */
16839 read_addr_index_1 (unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
16841 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16842 bfd
*abfd
= objfile
->obfd
;
16843 const gdb_byte
*info_ptr
;
16845 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
16846 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
16847 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
16848 objfile_name (objfile
));
16849 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
16850 error (_("DW_FORM_addr_index pointing outside of "
16851 ".debug_addr section [in module %s]"),
16852 objfile_name (objfile
));
16853 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
16854 + addr_base
+ addr_index
* addr_size
);
16855 if (addr_size
== 4)
16856 return bfd_get_32 (abfd
, info_ptr
);
16858 return bfd_get_64 (abfd
, info_ptr
);
16861 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
16864 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
16866 return read_addr_index_1 (addr_index
, cu
->addr_base
, cu
->header
.addr_size
);
16869 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
16872 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
16873 unsigned int *bytes_read
)
16875 bfd
*abfd
= cu
->objfile
->obfd
;
16876 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
16878 return read_addr_index (cu
, addr_index
);
16881 /* Data structure to pass results from dwarf2_read_addr_index_reader
16882 back to dwarf2_read_addr_index. */
16884 struct dwarf2_read_addr_index_data
16886 ULONGEST addr_base
;
16890 /* die_reader_func for dwarf2_read_addr_index. */
16893 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
16894 const gdb_byte
*info_ptr
,
16895 struct die_info
*comp_unit_die
,
16899 struct dwarf2_cu
*cu
= reader
->cu
;
16900 struct dwarf2_read_addr_index_data
*aidata
=
16901 (struct dwarf2_read_addr_index_data
*) data
;
16903 aidata
->addr_base
= cu
->addr_base
;
16904 aidata
->addr_size
= cu
->header
.addr_size
;
16907 /* Given an index in .debug_addr, fetch the value.
16908 NOTE: This can be called during dwarf expression evaluation,
16909 long after the debug information has been read, and thus per_cu->cu
16910 may no longer exist. */
16913 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
16914 unsigned int addr_index
)
16916 struct objfile
*objfile
= per_cu
->objfile
;
16917 struct dwarf2_cu
*cu
= per_cu
->cu
;
16918 ULONGEST addr_base
;
16921 /* This is intended to be called from outside this file. */
16922 dw2_setup (objfile
);
16924 /* We need addr_base and addr_size.
16925 If we don't have PER_CU->cu, we have to get it.
16926 Nasty, but the alternative is storing the needed info in PER_CU,
16927 which at this point doesn't seem justified: it's not clear how frequently
16928 it would get used and it would increase the size of every PER_CU.
16929 Entry points like dwarf2_per_cu_addr_size do a similar thing
16930 so we're not in uncharted territory here.
16931 Alas we need to be a bit more complicated as addr_base is contained
16934 We don't need to read the entire CU(/TU).
16935 We just need the header and top level die.
16937 IWBN to use the aging mechanism to let us lazily later discard the CU.
16938 For now we skip this optimization. */
16942 addr_base
= cu
->addr_base
;
16943 addr_size
= cu
->header
.addr_size
;
16947 struct dwarf2_read_addr_index_data aidata
;
16949 /* Note: We can't use init_cutu_and_read_dies_simple here,
16950 we need addr_base. */
16951 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
16952 dwarf2_read_addr_index_reader
, &aidata
);
16953 addr_base
= aidata
.addr_base
;
16954 addr_size
= aidata
.addr_size
;
16957 return read_addr_index_1 (addr_index
, addr_base
, addr_size
);
16960 /* Given a DW_FORM_GNU_str_index, fetch the string.
16961 This is only used by the Fission support. */
16963 static const char *
16964 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
16966 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16967 const char *objf_name
= objfile_name (objfile
);
16968 bfd
*abfd
= objfile
->obfd
;
16969 struct dwarf2_cu
*cu
= reader
->cu
;
16970 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
16971 struct dwarf2_section_info
*str_offsets_section
=
16972 &reader
->dwo_file
->sections
.str_offsets
;
16973 const gdb_byte
*info_ptr
;
16974 ULONGEST str_offset
;
16975 static const char form_name
[] = "DW_FORM_GNU_str_index";
16977 dwarf2_read_section (objfile
, str_section
);
16978 dwarf2_read_section (objfile
, str_offsets_section
);
16979 if (str_section
->buffer
== NULL
)
16980 error (_("%s used without .debug_str.dwo section"
16981 " in CU at offset 0x%lx [in module %s]"),
16982 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16983 if (str_offsets_section
->buffer
== NULL
)
16984 error (_("%s used without .debug_str_offsets.dwo section"
16985 " in CU at offset 0x%lx [in module %s]"),
16986 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16987 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
16988 error (_("%s pointing outside of .debug_str_offsets.dwo"
16989 " section in CU at offset 0x%lx [in module %s]"),
16990 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16991 info_ptr
= (str_offsets_section
->buffer
16992 + str_index
* cu
->header
.offset_size
);
16993 if (cu
->header
.offset_size
== 4)
16994 str_offset
= bfd_get_32 (abfd
, info_ptr
);
16996 str_offset
= bfd_get_64 (abfd
, info_ptr
);
16997 if (str_offset
>= str_section
->size
)
16998 error (_("Offset from %s pointing outside of"
16999 " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"),
17000 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
17001 return (const char *) (str_section
->buffer
+ str_offset
);
17004 /* Return the length of an LEB128 number in BUF. */
17007 leb128_size (const gdb_byte
*buf
)
17009 const gdb_byte
*begin
= buf
;
17015 if ((byte
& 128) == 0)
17016 return buf
- begin
;
17021 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
17030 cu
->language
= language_c
;
17033 case DW_LANG_C_plus_plus
:
17034 case DW_LANG_C_plus_plus_11
:
17035 case DW_LANG_C_plus_plus_14
:
17036 cu
->language
= language_cplus
;
17039 cu
->language
= language_d
;
17041 case DW_LANG_Fortran77
:
17042 case DW_LANG_Fortran90
:
17043 case DW_LANG_Fortran95
:
17044 case DW_LANG_Fortran03
:
17045 case DW_LANG_Fortran08
:
17046 cu
->language
= language_fortran
;
17049 cu
->language
= language_go
;
17051 case DW_LANG_Mips_Assembler
:
17052 cu
->language
= language_asm
;
17054 case DW_LANG_Ada83
:
17055 case DW_LANG_Ada95
:
17056 cu
->language
= language_ada
;
17058 case DW_LANG_Modula2
:
17059 cu
->language
= language_m2
;
17061 case DW_LANG_Pascal83
:
17062 cu
->language
= language_pascal
;
17065 cu
->language
= language_objc
;
17068 case DW_LANG_Rust_old
:
17069 cu
->language
= language_rust
;
17071 case DW_LANG_Cobol74
:
17072 case DW_LANG_Cobol85
:
17074 cu
->language
= language_minimal
;
17077 cu
->language_defn
= language_def (cu
->language
);
17080 /* Return the named attribute or NULL if not there. */
17082 static struct attribute
*
17083 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
17088 struct attribute
*spec
= NULL
;
17090 for (i
= 0; i
< die
->num_attrs
; ++i
)
17092 if (die
->attrs
[i
].name
== name
)
17093 return &die
->attrs
[i
];
17094 if (die
->attrs
[i
].name
== DW_AT_specification
17095 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
17096 spec
= &die
->attrs
[i
];
17102 die
= follow_die_ref (die
, spec
, &cu
);
17108 /* Return the named attribute or NULL if not there,
17109 but do not follow DW_AT_specification, etc.
17110 This is for use in contexts where we're reading .debug_types dies.
17111 Following DW_AT_specification, DW_AT_abstract_origin will take us
17112 back up the chain, and we want to go down. */
17114 static struct attribute
*
17115 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
17119 for (i
= 0; i
< die
->num_attrs
; ++i
)
17120 if (die
->attrs
[i
].name
== name
)
17121 return &die
->attrs
[i
];
17126 /* Return the string associated with a string-typed attribute, or NULL if it
17127 is either not found or is of an incorrect type. */
17129 static const char *
17130 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
17132 struct attribute
*attr
;
17133 const char *str
= NULL
;
17135 attr
= dwarf2_attr (die
, name
, cu
);
17139 if (attr
->form
== DW_FORM_strp
|| attr
->form
== DW_FORM_string
17140 || attr
->form
== DW_FORM_GNU_strp_alt
)
17141 str
= DW_STRING (attr
);
17143 complaint (&symfile_complaints
,
17144 _("string type expected for attribute %s for "
17145 "DIE at 0x%x in module %s"),
17146 dwarf_attr_name (name
), die
->offset
.sect_off
,
17147 objfile_name (cu
->objfile
));
17153 /* Return non-zero iff the attribute NAME is defined for the given DIE,
17154 and holds a non-zero value. This function should only be used for
17155 DW_FORM_flag or DW_FORM_flag_present attributes. */
17158 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
17160 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
17162 return (attr
&& DW_UNSND (attr
));
17166 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
17168 /* A DIE is a declaration if it has a DW_AT_declaration attribute
17169 which value is non-zero. However, we have to be careful with
17170 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
17171 (via dwarf2_flag_true_p) follows this attribute. So we may
17172 end up accidently finding a declaration attribute that belongs
17173 to a different DIE referenced by the specification attribute,
17174 even though the given DIE does not have a declaration attribute. */
17175 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
17176 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
17179 /* Return the die giving the specification for DIE, if there is
17180 one. *SPEC_CU is the CU containing DIE on input, and the CU
17181 containing the return value on output. If there is no
17182 specification, but there is an abstract origin, that is
17185 static struct die_info
*
17186 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
17188 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
17191 if (spec_attr
== NULL
)
17192 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
17194 if (spec_attr
== NULL
)
17197 return follow_die_ref (die
, spec_attr
, spec_cu
);
17200 /* Free the line_header structure *LH, and any arrays and strings it
17202 NOTE: This is also used as a "cleanup" function. */
17205 free_line_header (struct line_header
*lh
)
17207 if (lh
->standard_opcode_lengths
)
17208 xfree (lh
->standard_opcode_lengths
);
17210 /* Remember that all the lh->file_names[i].name pointers are
17211 pointers into debug_line_buffer, and don't need to be freed. */
17212 if (lh
->file_names
)
17213 xfree (lh
->file_names
);
17215 /* Similarly for the include directory names. */
17216 if (lh
->include_dirs
)
17217 xfree (lh
->include_dirs
);
17222 /* Stub for free_line_header to match void * callback types. */
17225 free_line_header_voidp (void *arg
)
17227 struct line_header
*lh
= (struct line_header
*) arg
;
17229 free_line_header (lh
);
17232 /* Add an entry to LH's include directory table. */
17235 add_include_dir (struct line_header
*lh
, const char *include_dir
)
17237 if (dwarf_line_debug
>= 2)
17238 fprintf_unfiltered (gdb_stdlog
, "Adding dir %u: %s\n",
17239 lh
->num_include_dirs
+ 1, include_dir
);
17241 /* Grow the array if necessary. */
17242 if (lh
->include_dirs_size
== 0)
17244 lh
->include_dirs_size
= 1; /* for testing */
17245 lh
->include_dirs
= XNEWVEC (const char *, lh
->include_dirs_size
);
17247 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
17249 lh
->include_dirs_size
*= 2;
17250 lh
->include_dirs
= XRESIZEVEC (const char *, lh
->include_dirs
,
17251 lh
->include_dirs_size
);
17254 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
17257 /* Add an entry to LH's file name table. */
17260 add_file_name (struct line_header
*lh
,
17262 unsigned int dir_index
,
17263 unsigned int mod_time
,
17264 unsigned int length
)
17266 struct file_entry
*fe
;
17268 if (dwarf_line_debug
>= 2)
17269 fprintf_unfiltered (gdb_stdlog
, "Adding file %u: %s\n",
17270 lh
->num_file_names
+ 1, name
);
17272 /* Grow the array if necessary. */
17273 if (lh
->file_names_size
== 0)
17275 lh
->file_names_size
= 1; /* for testing */
17276 lh
->file_names
= XNEWVEC (struct file_entry
, lh
->file_names_size
);
17278 else if (lh
->num_file_names
>= lh
->file_names_size
)
17280 lh
->file_names_size
*= 2;
17282 = XRESIZEVEC (struct file_entry
, lh
->file_names
, lh
->file_names_size
);
17285 fe
= &lh
->file_names
[lh
->num_file_names
++];
17287 fe
->dir_index
= dir_index
;
17288 fe
->mod_time
= mod_time
;
17289 fe
->length
= length
;
17290 fe
->included_p
= 0;
17294 /* A convenience function to find the proper .debug_line section for a CU. */
17296 static struct dwarf2_section_info
*
17297 get_debug_line_section (struct dwarf2_cu
*cu
)
17299 struct dwarf2_section_info
*section
;
17301 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
17303 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
17304 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
17305 else if (cu
->per_cu
->is_dwz
)
17307 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
17309 section
= &dwz
->line
;
17312 section
= &dwarf2_per_objfile
->line
;
17317 /* Read the statement program header starting at OFFSET in
17318 .debug_line, or .debug_line.dwo. Return a pointer
17319 to a struct line_header, allocated using xmalloc.
17320 Returns NULL if there is a problem reading the header, e.g., if it
17321 has a version we don't understand.
17323 NOTE: the strings in the include directory and file name tables of
17324 the returned object point into the dwarf line section buffer,
17325 and must not be freed. */
17327 static struct line_header
*
17328 dwarf_decode_line_header (unsigned int offset
, struct dwarf2_cu
*cu
)
17330 struct cleanup
*back_to
;
17331 struct line_header
*lh
;
17332 const gdb_byte
*line_ptr
;
17333 unsigned int bytes_read
, offset_size
;
17335 const char *cur_dir
, *cur_file
;
17336 struct dwarf2_section_info
*section
;
17339 section
= get_debug_line_section (cu
);
17340 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
17341 if (section
->buffer
== NULL
)
17343 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
17344 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
17346 complaint (&symfile_complaints
, _("missing .debug_line section"));
17350 /* We can't do this until we know the section is non-empty.
17351 Only then do we know we have such a section. */
17352 abfd
= get_section_bfd_owner (section
);
17354 /* Make sure that at least there's room for the total_length field.
17355 That could be 12 bytes long, but we're just going to fudge that. */
17356 if (offset
+ 4 >= section
->size
)
17358 dwarf2_statement_list_fits_in_line_number_section_complaint ();
17362 lh
= XNEW (struct line_header
);
17363 memset (lh
, 0, sizeof (*lh
));
17364 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
17367 lh
->offset
.sect_off
= offset
;
17368 lh
->offset_in_dwz
= cu
->per_cu
->is_dwz
;
17370 line_ptr
= section
->buffer
+ offset
;
17372 /* Read in the header. */
17374 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
17375 &bytes_read
, &offset_size
);
17376 line_ptr
+= bytes_read
;
17377 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
17379 dwarf2_statement_list_fits_in_line_number_section_complaint ();
17380 do_cleanups (back_to
);
17383 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
17384 lh
->version
= read_2_bytes (abfd
, line_ptr
);
17386 if (lh
->version
> 4)
17388 /* This is a version we don't understand. The format could have
17389 changed in ways we don't handle properly so just punt. */
17390 complaint (&symfile_complaints
,
17391 _("unsupported version in .debug_line section"));
17394 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
17395 line_ptr
+= offset_size
;
17396 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
17398 if (lh
->version
>= 4)
17400 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
17404 lh
->maximum_ops_per_instruction
= 1;
17406 if (lh
->maximum_ops_per_instruction
== 0)
17408 lh
->maximum_ops_per_instruction
= 1;
17409 complaint (&symfile_complaints
,
17410 _("invalid maximum_ops_per_instruction "
17411 "in `.debug_line' section"));
17414 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
17416 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
17418 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
17420 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
17422 lh
->standard_opcode_lengths
= XNEWVEC (unsigned char, lh
->opcode_base
);
17424 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
17425 for (i
= 1; i
< lh
->opcode_base
; ++i
)
17427 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
17431 /* Read directory table. */
17432 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
17434 line_ptr
+= bytes_read
;
17435 add_include_dir (lh
, cur_dir
);
17437 line_ptr
+= bytes_read
;
17439 /* Read file name table. */
17440 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
17442 unsigned int dir_index
, mod_time
, length
;
17444 line_ptr
+= bytes_read
;
17445 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17446 line_ptr
+= bytes_read
;
17447 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17448 line_ptr
+= bytes_read
;
17449 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17450 line_ptr
+= bytes_read
;
17452 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
17454 line_ptr
+= bytes_read
;
17455 lh
->statement_program_start
= line_ptr
;
17457 if (line_ptr
> (section
->buffer
+ section
->size
))
17458 complaint (&symfile_complaints
,
17459 _("line number info header doesn't "
17460 "fit in `.debug_line' section"));
17462 discard_cleanups (back_to
);
17466 /* Subroutine of dwarf_decode_lines to simplify it.
17467 Return the file name of the psymtab for included file FILE_INDEX
17468 in line header LH of PST.
17469 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
17470 If space for the result is malloc'd, it will be freed by a cleanup.
17471 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename.
17473 The function creates dangling cleanup registration. */
17475 static const char *
17476 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
17477 const struct partial_symtab
*pst
,
17478 const char *comp_dir
)
17480 const struct file_entry fe
= lh
->file_names
[file_index
];
17481 const char *include_name
= fe
.name
;
17482 const char *include_name_to_compare
= include_name
;
17483 const char *dir_name
= NULL
;
17484 const char *pst_filename
;
17485 char *copied_name
= NULL
;
17488 if (fe
.dir_index
&& lh
->include_dirs
!= NULL
)
17489 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
17491 if (!IS_ABSOLUTE_PATH (include_name
)
17492 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
17494 /* Avoid creating a duplicate psymtab for PST.
17495 We do this by comparing INCLUDE_NAME and PST_FILENAME.
17496 Before we do the comparison, however, we need to account
17497 for DIR_NAME and COMP_DIR.
17498 First prepend dir_name (if non-NULL). If we still don't
17499 have an absolute path prepend comp_dir (if non-NULL).
17500 However, the directory we record in the include-file's
17501 psymtab does not contain COMP_DIR (to match the
17502 corresponding symtab(s)).
17507 bash$ gcc -g ./hello.c
17508 include_name = "hello.c"
17510 DW_AT_comp_dir = comp_dir = "/tmp"
17511 DW_AT_name = "./hello.c"
17515 if (dir_name
!= NULL
)
17517 char *tem
= concat (dir_name
, SLASH_STRING
,
17518 include_name
, (char *)NULL
);
17520 make_cleanup (xfree
, tem
);
17521 include_name
= tem
;
17522 include_name_to_compare
= include_name
;
17524 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
17526 char *tem
= concat (comp_dir
, SLASH_STRING
,
17527 include_name
, (char *)NULL
);
17529 make_cleanup (xfree
, tem
);
17530 include_name_to_compare
= tem
;
17534 pst_filename
= pst
->filename
;
17535 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
17537 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
17538 pst_filename
, (char *)NULL
);
17539 pst_filename
= copied_name
;
17542 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
17544 if (copied_name
!= NULL
)
17545 xfree (copied_name
);
17549 return include_name
;
17552 /* State machine to track the state of the line number program. */
17556 /* These are part of the standard DWARF line number state machine. */
17558 unsigned char op_index
;
17563 unsigned int discriminator
;
17565 /* Additional bits of state we need to track. */
17567 /* The last file that we called dwarf2_start_subfile for.
17568 This is only used for TLLs. */
17569 unsigned int last_file
;
17570 /* The last file a line number was recorded for. */
17571 struct subfile
*last_subfile
;
17573 /* The function to call to record a line. */
17574 record_line_ftype
*record_line
;
17576 /* The last line number that was recorded, used to coalesce
17577 consecutive entries for the same line. This can happen, for
17578 example, when discriminators are present. PR 17276. */
17579 unsigned int last_line
;
17580 int line_has_non_zero_discriminator
;
17581 } lnp_state_machine
;
17583 /* There's a lot of static state to pass to dwarf_record_line.
17584 This keeps it all together. */
17589 struct gdbarch
*gdbarch
;
17591 /* The line number header. */
17592 struct line_header
*line_header
;
17594 /* Non-zero if we're recording lines.
17595 Otherwise we're building partial symtabs and are just interested in
17596 finding include files mentioned by the line number program. */
17597 int record_lines_p
;
17598 } lnp_reader_state
;
17600 /* Ignore this record_line request. */
17603 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
17608 /* Return non-zero if we should add LINE to the line number table.
17609 LINE is the line to add, LAST_LINE is the last line that was added,
17610 LAST_SUBFILE is the subfile for LAST_LINE.
17611 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
17612 had a non-zero discriminator.
17614 We have to be careful in the presence of discriminators.
17615 E.g., for this line:
17617 for (i = 0; i < 100000; i++);
17619 clang can emit four line number entries for that one line,
17620 each with a different discriminator.
17621 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
17623 However, we want gdb to coalesce all four entries into one.
17624 Otherwise the user could stepi into the middle of the line and
17625 gdb would get confused about whether the pc really was in the
17626 middle of the line.
17628 Things are further complicated by the fact that two consecutive
17629 line number entries for the same line is a heuristic used by gcc
17630 to denote the end of the prologue. So we can't just discard duplicate
17631 entries, we have to be selective about it. The heuristic we use is
17632 that we only collapse consecutive entries for the same line if at least
17633 one of those entries has a non-zero discriminator. PR 17276.
17635 Note: Addresses in the line number state machine can never go backwards
17636 within one sequence, thus this coalescing is ok. */
17639 dwarf_record_line_p (unsigned int line
, unsigned int last_line
,
17640 int line_has_non_zero_discriminator
,
17641 struct subfile
*last_subfile
)
17643 if (current_subfile
!= last_subfile
)
17645 if (line
!= last_line
)
17647 /* Same line for the same file that we've seen already.
17648 As a last check, for pr 17276, only record the line if the line
17649 has never had a non-zero discriminator. */
17650 if (!line_has_non_zero_discriminator
)
17655 /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS
17656 in the line table of subfile SUBFILE. */
17659 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
17660 unsigned int line
, CORE_ADDR address
,
17661 record_line_ftype p_record_line
)
17663 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
17665 if (dwarf_line_debug
)
17667 fprintf_unfiltered (gdb_stdlog
,
17668 "Recording line %u, file %s, address %s\n",
17669 line
, lbasename (subfile
->name
),
17670 paddress (gdbarch
, address
));
17673 (*p_record_line
) (subfile
, line
, addr
);
17676 /* Subroutine of dwarf_decode_lines_1 to simplify it.
17677 Mark the end of a set of line number records.
17678 The arguments are the same as for dwarf_record_line_1.
17679 If SUBFILE is NULL the request is ignored. */
17682 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
17683 CORE_ADDR address
, record_line_ftype p_record_line
)
17685 if (subfile
== NULL
)
17688 if (dwarf_line_debug
)
17690 fprintf_unfiltered (gdb_stdlog
,
17691 "Finishing current line, file %s, address %s\n",
17692 lbasename (subfile
->name
),
17693 paddress (gdbarch
, address
));
17696 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, p_record_line
);
17699 /* Record the line in STATE.
17700 END_SEQUENCE is non-zero if we're processing the end of a sequence. */
17703 dwarf_record_line (lnp_reader_state
*reader
, lnp_state_machine
*state
,
17706 const struct line_header
*lh
= reader
->line_header
;
17707 unsigned int file
, line
, discriminator
;
17710 file
= state
->file
;
17711 line
= state
->line
;
17712 is_stmt
= state
->is_stmt
;
17713 discriminator
= state
->discriminator
;
17715 if (dwarf_line_debug
)
17717 fprintf_unfiltered (gdb_stdlog
,
17718 "Processing actual line %u: file %u,"
17719 " address %s, is_stmt %u, discrim %u\n",
17721 paddress (reader
->gdbarch
, state
->address
),
17722 is_stmt
, discriminator
);
17725 if (file
== 0 || file
- 1 >= lh
->num_file_names
)
17726 dwarf2_debug_line_missing_file_complaint ();
17727 /* For now we ignore lines not starting on an instruction boundary.
17728 But not when processing end_sequence for compatibility with the
17729 previous version of the code. */
17730 else if (state
->op_index
== 0 || end_sequence
)
17732 lh
->file_names
[file
- 1].included_p
= 1;
17733 if (reader
->record_lines_p
&& is_stmt
)
17735 if (state
->last_subfile
!= current_subfile
|| end_sequence
)
17737 dwarf_finish_line (reader
->gdbarch
, state
->last_subfile
,
17738 state
->address
, state
->record_line
);
17743 if (dwarf_record_line_p (line
, state
->last_line
,
17744 state
->line_has_non_zero_discriminator
,
17745 state
->last_subfile
))
17747 dwarf_record_line_1 (reader
->gdbarch
, current_subfile
,
17748 line
, state
->address
,
17749 state
->record_line
);
17751 state
->last_subfile
= current_subfile
;
17752 state
->last_line
= line
;
17758 /* Initialize STATE for the start of a line number program. */
17761 init_lnp_state_machine (lnp_state_machine
*state
,
17762 const lnp_reader_state
*reader
)
17764 memset (state
, 0, sizeof (*state
));
17766 /* Just starting, there is no "last file". */
17767 state
->last_file
= 0;
17768 state
->last_subfile
= NULL
;
17770 state
->record_line
= record_line
;
17772 state
->last_line
= 0;
17773 state
->line_has_non_zero_discriminator
= 0;
17775 /* Initialize these according to the DWARF spec. */
17776 state
->op_index
= 0;
17779 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
17780 was a line entry for it so that the backend has a chance to adjust it
17781 and also record it in case it needs it. This is currently used by MIPS
17782 code, cf. `mips_adjust_dwarf2_line'. */
17783 state
->address
= gdbarch_adjust_dwarf2_line (reader
->gdbarch
, 0, 0);
17784 state
->is_stmt
= reader
->line_header
->default_is_stmt
;
17785 state
->discriminator
= 0;
17788 /* Check address and if invalid nop-out the rest of the lines in this
17792 check_line_address (struct dwarf2_cu
*cu
, lnp_state_machine
*state
,
17793 const gdb_byte
*line_ptr
,
17794 CORE_ADDR lowpc
, CORE_ADDR address
)
17796 /* If address < lowpc then it's not a usable value, it's outside the
17797 pc range of the CU. However, we restrict the test to only address
17798 values of zero to preserve GDB's previous behaviour which is to
17799 handle the specific case of a function being GC'd by the linker. */
17801 if (address
== 0 && address
< lowpc
)
17803 /* This line table is for a function which has been
17804 GCd by the linker. Ignore it. PR gdb/12528 */
17806 struct objfile
*objfile
= cu
->objfile
;
17807 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
17809 complaint (&symfile_complaints
,
17810 _(".debug_line address at offset 0x%lx is 0 [in module %s]"),
17811 line_offset
, objfile_name (objfile
));
17812 state
->record_line
= noop_record_line
;
17813 /* Note: sm.record_line is left as noop_record_line
17814 until we see DW_LNE_end_sequence. */
17818 /* Subroutine of dwarf_decode_lines to simplify it.
17819 Process the line number information in LH.
17820 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
17821 program in order to set included_p for every referenced header. */
17824 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
17825 const int decode_for_pst_p
, CORE_ADDR lowpc
)
17827 const gdb_byte
*line_ptr
, *extended_end
;
17828 const gdb_byte
*line_end
;
17829 unsigned int bytes_read
, extended_len
;
17830 unsigned char op_code
, extended_op
;
17831 CORE_ADDR baseaddr
;
17832 struct objfile
*objfile
= cu
->objfile
;
17833 bfd
*abfd
= objfile
->obfd
;
17834 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17835 /* Non-zero if we're recording line info (as opposed to building partial
17837 int record_lines_p
= !decode_for_pst_p
;
17838 /* A collection of things we need to pass to dwarf_record_line. */
17839 lnp_reader_state reader_state
;
17841 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
17843 line_ptr
= lh
->statement_program_start
;
17844 line_end
= lh
->statement_program_end
;
17846 reader_state
.gdbarch
= gdbarch
;
17847 reader_state
.line_header
= lh
;
17848 reader_state
.record_lines_p
= record_lines_p
;
17850 /* Read the statement sequences until there's nothing left. */
17851 while (line_ptr
< line_end
)
17853 /* The DWARF line number program state machine. */
17854 lnp_state_machine state_machine
;
17855 int end_sequence
= 0;
17857 /* Reset the state machine at the start of each sequence. */
17858 init_lnp_state_machine (&state_machine
, &reader_state
);
17860 if (record_lines_p
&& lh
->num_file_names
>= state_machine
.file
)
17862 /* Start a subfile for the current file of the state machine. */
17863 /* lh->include_dirs and lh->file_names are 0-based, but the
17864 directory and file name numbers in the statement program
17866 struct file_entry
*fe
= &lh
->file_names
[state_machine
.file
- 1];
17867 const char *dir
= NULL
;
17869 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
17870 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17872 dwarf2_start_subfile (fe
->name
, dir
);
17875 /* Decode the table. */
17876 while (line_ptr
< line_end
&& !end_sequence
)
17878 op_code
= read_1_byte (abfd
, line_ptr
);
17881 if (op_code
>= lh
->opcode_base
)
17883 /* Special opcode. */
17884 unsigned char adj_opcode
;
17885 CORE_ADDR addr_adj
;
17888 adj_opcode
= op_code
- lh
->opcode_base
;
17889 addr_adj
= (((state_machine
.op_index
17890 + (adj_opcode
/ lh
->line_range
))
17891 / lh
->maximum_ops_per_instruction
)
17892 * lh
->minimum_instruction_length
);
17893 state_machine
.address
17894 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17895 state_machine
.op_index
= ((state_machine
.op_index
17896 + (adj_opcode
/ lh
->line_range
))
17897 % lh
->maximum_ops_per_instruction
);
17898 line_delta
= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
17899 state_machine
.line
+= line_delta
;
17900 if (line_delta
!= 0)
17901 state_machine
.line_has_non_zero_discriminator
17902 = state_machine
.discriminator
!= 0;
17904 dwarf_record_line (&reader_state
, &state_machine
, 0);
17905 state_machine
.discriminator
= 0;
17907 else switch (op_code
)
17909 case DW_LNS_extended_op
:
17910 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
17912 line_ptr
+= bytes_read
;
17913 extended_end
= line_ptr
+ extended_len
;
17914 extended_op
= read_1_byte (abfd
, line_ptr
);
17916 switch (extended_op
)
17918 case DW_LNE_end_sequence
:
17919 state_machine
.record_line
= record_line
;
17922 case DW_LNE_set_address
:
17925 = read_address (abfd
, line_ptr
, cu
, &bytes_read
);
17927 line_ptr
+= bytes_read
;
17928 check_line_address (cu
, &state_machine
, line_ptr
,
17930 state_machine
.op_index
= 0;
17931 address
+= baseaddr
;
17932 state_machine
.address
17933 = gdbarch_adjust_dwarf2_line (gdbarch
, address
, 0);
17936 case DW_LNE_define_file
:
17938 const char *cur_file
;
17939 unsigned int dir_index
, mod_time
, length
;
17941 cur_file
= read_direct_string (abfd
, line_ptr
,
17943 line_ptr
+= bytes_read
;
17945 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17946 line_ptr
+= bytes_read
;
17948 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17949 line_ptr
+= bytes_read
;
17951 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17952 line_ptr
+= bytes_read
;
17953 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
17956 case DW_LNE_set_discriminator
:
17957 /* The discriminator is not interesting to the debugger;
17958 just ignore it. We still need to check its value though:
17959 if there are consecutive entries for the same
17960 (non-prologue) line we want to coalesce them.
17962 state_machine
.discriminator
17963 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17964 state_machine
.line_has_non_zero_discriminator
17965 |= state_machine
.discriminator
!= 0;
17966 line_ptr
+= bytes_read
;
17969 complaint (&symfile_complaints
,
17970 _("mangled .debug_line section"));
17973 /* Make sure that we parsed the extended op correctly. If e.g.
17974 we expected a different address size than the producer used,
17975 we may have read the wrong number of bytes. */
17976 if (line_ptr
!= extended_end
)
17978 complaint (&symfile_complaints
,
17979 _("mangled .debug_line section"));
17984 dwarf_record_line (&reader_state
, &state_machine
, 0);
17985 state_machine
.discriminator
= 0;
17987 case DW_LNS_advance_pc
:
17990 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17991 CORE_ADDR addr_adj
;
17993 addr_adj
= (((state_machine
.op_index
+ adjust
)
17994 / lh
->maximum_ops_per_instruction
)
17995 * lh
->minimum_instruction_length
);
17996 state_machine
.address
17997 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17998 state_machine
.op_index
= ((state_machine
.op_index
+ adjust
)
17999 % lh
->maximum_ops_per_instruction
);
18000 line_ptr
+= bytes_read
;
18003 case DW_LNS_advance_line
:
18006 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
18008 state_machine
.line
+= line_delta
;
18009 if (line_delta
!= 0)
18010 state_machine
.line_has_non_zero_discriminator
18011 = state_machine
.discriminator
!= 0;
18012 line_ptr
+= bytes_read
;
18015 case DW_LNS_set_file
:
18017 /* The arrays lh->include_dirs and lh->file_names are
18018 0-based, but the directory and file name numbers in
18019 the statement program are 1-based. */
18020 struct file_entry
*fe
;
18021 const char *dir
= NULL
;
18023 state_machine
.file
= read_unsigned_leb128 (abfd
, line_ptr
,
18025 line_ptr
+= bytes_read
;
18026 if (state_machine
.file
== 0
18027 || state_machine
.file
- 1 >= lh
->num_file_names
)
18028 dwarf2_debug_line_missing_file_complaint ();
18031 fe
= &lh
->file_names
[state_machine
.file
- 1];
18032 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
18033 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
18034 if (record_lines_p
)
18036 state_machine
.last_subfile
= current_subfile
;
18037 state_machine
.line_has_non_zero_discriminator
18038 = state_machine
.discriminator
!= 0;
18039 dwarf2_start_subfile (fe
->name
, dir
);
18044 case DW_LNS_set_column
:
18045 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18046 line_ptr
+= bytes_read
;
18048 case DW_LNS_negate_stmt
:
18049 state_machine
.is_stmt
= (!state_machine
.is_stmt
);
18051 case DW_LNS_set_basic_block
:
18053 /* Add to the address register of the state machine the
18054 address increment value corresponding to special opcode
18055 255. I.e., this value is scaled by the minimum
18056 instruction length since special opcode 255 would have
18057 scaled the increment. */
18058 case DW_LNS_const_add_pc
:
18060 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
18061 CORE_ADDR addr_adj
;
18063 addr_adj
= (((state_machine
.op_index
+ adjust
)
18064 / lh
->maximum_ops_per_instruction
)
18065 * lh
->minimum_instruction_length
);
18066 state_machine
.address
18067 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
18068 state_machine
.op_index
= ((state_machine
.op_index
+ adjust
)
18069 % lh
->maximum_ops_per_instruction
);
18072 case DW_LNS_fixed_advance_pc
:
18074 CORE_ADDR addr_adj
;
18076 addr_adj
= read_2_bytes (abfd
, line_ptr
);
18077 state_machine
.address
18078 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
18079 state_machine
.op_index
= 0;
18085 /* Unknown standard opcode, ignore it. */
18088 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
18090 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18091 line_ptr
+= bytes_read
;
18098 dwarf2_debug_line_missing_end_sequence_complaint ();
18100 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
18101 in which case we still finish recording the last line). */
18102 dwarf_record_line (&reader_state
, &state_machine
, 1);
18106 /* Decode the Line Number Program (LNP) for the given line_header
18107 structure and CU. The actual information extracted and the type
18108 of structures created from the LNP depends on the value of PST.
18110 1. If PST is NULL, then this procedure uses the data from the program
18111 to create all necessary symbol tables, and their linetables.
18113 2. If PST is not NULL, this procedure reads the program to determine
18114 the list of files included by the unit represented by PST, and
18115 builds all the associated partial symbol tables.
18117 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
18118 It is used for relative paths in the line table.
18119 NOTE: When processing partial symtabs (pst != NULL),
18120 comp_dir == pst->dirname.
18122 NOTE: It is important that psymtabs have the same file name (via strcmp)
18123 as the corresponding symtab. Since COMP_DIR is not used in the name of the
18124 symtab we don't use it in the name of the psymtabs we create.
18125 E.g. expand_line_sal requires this when finding psymtabs to expand.
18126 A good testcase for this is mb-inline.exp.
18128 LOWPC is the lowest address in CU (or 0 if not known).
18130 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
18131 for its PC<->lines mapping information. Otherwise only the filename
18132 table is read in. */
18135 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
18136 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
18137 CORE_ADDR lowpc
, int decode_mapping
)
18139 struct objfile
*objfile
= cu
->objfile
;
18140 const int decode_for_pst_p
= (pst
!= NULL
);
18142 if (decode_mapping
)
18143 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
18145 if (decode_for_pst_p
)
18149 /* Now that we're done scanning the Line Header Program, we can
18150 create the psymtab of each included file. */
18151 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
18152 if (lh
->file_names
[file_index
].included_p
== 1)
18154 const char *include_name
=
18155 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
18156 if (include_name
!= NULL
)
18157 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
18162 /* Make sure a symtab is created for every file, even files
18163 which contain only variables (i.e. no code with associated
18165 struct compunit_symtab
*cust
= buildsym_compunit_symtab ();
18168 for (i
= 0; i
< lh
->num_file_names
; i
++)
18170 const char *dir
= NULL
;
18171 struct file_entry
*fe
;
18173 fe
= &lh
->file_names
[i
];
18174 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
18175 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
18176 dwarf2_start_subfile (fe
->name
, dir
);
18178 if (current_subfile
->symtab
== NULL
)
18180 current_subfile
->symtab
18181 = allocate_symtab (cust
, current_subfile
->name
);
18183 fe
->symtab
= current_subfile
->symtab
;
18188 /* Start a subfile for DWARF. FILENAME is the name of the file and
18189 DIRNAME the name of the source directory which contains FILENAME
18190 or NULL if not known.
18191 This routine tries to keep line numbers from identical absolute and
18192 relative file names in a common subfile.
18194 Using the `list' example from the GDB testsuite, which resides in
18195 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
18196 of /srcdir/list0.c yields the following debugging information for list0.c:
18198 DW_AT_name: /srcdir/list0.c
18199 DW_AT_comp_dir: /compdir
18200 files.files[0].name: list0.h
18201 files.files[0].dir: /srcdir
18202 files.files[1].name: list0.c
18203 files.files[1].dir: /srcdir
18205 The line number information for list0.c has to end up in a single
18206 subfile, so that `break /srcdir/list0.c:1' works as expected.
18207 start_subfile will ensure that this happens provided that we pass the
18208 concatenation of files.files[1].dir and files.files[1].name as the
18212 dwarf2_start_subfile (const char *filename
, const char *dirname
)
18216 /* In order not to lose the line information directory,
18217 we concatenate it to the filename when it makes sense.
18218 Note that the Dwarf3 standard says (speaking of filenames in line
18219 information): ``The directory index is ignored for file names
18220 that represent full path names''. Thus ignoring dirname in the
18221 `else' branch below isn't an issue. */
18223 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
18225 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
18229 start_subfile (filename
);
18235 /* Start a symtab for DWARF.
18236 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
18238 static struct compunit_symtab
*
18239 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
18240 const char *name
, const char *comp_dir
, CORE_ADDR low_pc
)
18242 struct compunit_symtab
*cust
18243 = start_symtab (cu
->objfile
, name
, comp_dir
, low_pc
);
18245 record_debugformat ("DWARF 2");
18246 record_producer (cu
->producer
);
18248 /* We assume that we're processing GCC output. */
18249 processing_gcc_compilation
= 2;
18251 cu
->processing_has_namespace_info
= 0;
18257 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
18258 struct dwarf2_cu
*cu
)
18260 struct objfile
*objfile
= cu
->objfile
;
18261 struct comp_unit_head
*cu_header
= &cu
->header
;
18263 /* NOTE drow/2003-01-30: There used to be a comment and some special
18264 code here to turn a symbol with DW_AT_external and a
18265 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
18266 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
18267 with some versions of binutils) where shared libraries could have
18268 relocations against symbols in their debug information - the
18269 minimal symbol would have the right address, but the debug info
18270 would not. It's no longer necessary, because we will explicitly
18271 apply relocations when we read in the debug information now. */
18273 /* A DW_AT_location attribute with no contents indicates that a
18274 variable has been optimized away. */
18275 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
18277 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
18281 /* Handle one degenerate form of location expression specially, to
18282 preserve GDB's previous behavior when section offsets are
18283 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
18284 then mark this symbol as LOC_STATIC. */
18286 if (attr_form_is_block (attr
)
18287 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
18288 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
18289 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
18290 && (DW_BLOCK (attr
)->size
18291 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
18293 unsigned int dummy
;
18295 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
18296 SYMBOL_VALUE_ADDRESS (sym
) =
18297 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
18299 SYMBOL_VALUE_ADDRESS (sym
) =
18300 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
18301 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
18302 fixup_symbol_section (sym
, objfile
);
18303 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
18304 SYMBOL_SECTION (sym
));
18308 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
18309 expression evaluator, and use LOC_COMPUTED only when necessary
18310 (i.e. when the value of a register or memory location is
18311 referenced, or a thread-local block, etc.). Then again, it might
18312 not be worthwhile. I'm assuming that it isn't unless performance
18313 or memory numbers show me otherwise. */
18315 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
18317 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
18318 cu
->has_loclist
= 1;
18321 /* Given a pointer to a DWARF information entry, figure out if we need
18322 to make a symbol table entry for it, and if so, create a new entry
18323 and return a pointer to it.
18324 If TYPE is NULL, determine symbol type from the die, otherwise
18325 used the passed type.
18326 If SPACE is not NULL, use it to hold the new symbol. If it is
18327 NULL, allocate a new symbol on the objfile's obstack. */
18329 static struct symbol
*
18330 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
18331 struct symbol
*space
)
18333 struct objfile
*objfile
= cu
->objfile
;
18334 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18335 struct symbol
*sym
= NULL
;
18337 struct attribute
*attr
= NULL
;
18338 struct attribute
*attr2
= NULL
;
18339 CORE_ADDR baseaddr
;
18340 struct pending
**list_to_add
= NULL
;
18342 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
18344 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
18346 name
= dwarf2_name (die
, cu
);
18349 const char *linkagename
;
18350 int suppress_add
= 0;
18355 sym
= allocate_symbol (objfile
);
18356 OBJSTAT (objfile
, n_syms
++);
18358 /* Cache this symbol's name and the name's demangled form (if any). */
18359 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
18360 linkagename
= dwarf2_physname (name
, die
, cu
);
18361 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
18363 /* Fortran does not have mangling standard and the mangling does differ
18364 between gfortran, iFort etc. */
18365 if (cu
->language
== language_fortran
18366 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
18367 symbol_set_demangled_name (&(sym
->ginfo
),
18368 dwarf2_full_name (name
, die
, cu
),
18371 /* Default assumptions.
18372 Use the passed type or decode it from the die. */
18373 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18374 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
18376 SYMBOL_TYPE (sym
) = type
;
18378 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
18379 attr
= dwarf2_attr (die
,
18380 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
18384 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
18387 attr
= dwarf2_attr (die
,
18388 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
18392 int file_index
= DW_UNSND (attr
);
18394 if (cu
->line_header
== NULL
18395 || file_index
> cu
->line_header
->num_file_names
)
18396 complaint (&symfile_complaints
,
18397 _("file index out of range"));
18398 else if (file_index
> 0)
18400 struct file_entry
*fe
;
18402 fe
= &cu
->line_header
->file_names
[file_index
- 1];
18403 symbol_set_symtab (sym
, fe
->symtab
);
18410 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
18415 addr
= attr_value_as_address (attr
);
18416 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
18417 SYMBOL_VALUE_ADDRESS (sym
) = addr
;
18419 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
18420 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
18421 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
18422 add_symbol_to_list (sym
, cu
->list_in_scope
);
18424 case DW_TAG_subprogram
:
18425 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
18427 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
18428 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18429 if ((attr2
&& (DW_UNSND (attr2
) != 0))
18430 || cu
->language
== language_ada
)
18432 /* Subprograms marked external are stored as a global symbol.
18433 Ada subprograms, whether marked external or not, are always
18434 stored as a global symbol, because we want to be able to
18435 access them globally. For instance, we want to be able
18436 to break on a nested subprogram without having to
18437 specify the context. */
18438 list_to_add
= &global_symbols
;
18442 list_to_add
= cu
->list_in_scope
;
18445 case DW_TAG_inlined_subroutine
:
18446 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
18448 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
18449 SYMBOL_INLINED (sym
) = 1;
18450 list_to_add
= cu
->list_in_scope
;
18452 case DW_TAG_template_value_param
:
18454 /* Fall through. */
18455 case DW_TAG_constant
:
18456 case DW_TAG_variable
:
18457 case DW_TAG_member
:
18458 /* Compilation with minimal debug info may result in
18459 variables with missing type entries. Change the
18460 misleading `void' type to something sensible. */
18461 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
18463 = objfile_type (objfile
)->nodebug_data_symbol
;
18465 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18466 /* In the case of DW_TAG_member, we should only be called for
18467 static const members. */
18468 if (die
->tag
== DW_TAG_member
)
18470 /* dwarf2_add_field uses die_is_declaration,
18471 so we do the same. */
18472 gdb_assert (die_is_declaration (die
, cu
));
18477 dwarf2_const_value (attr
, sym
, cu
);
18478 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18481 if (attr2
&& (DW_UNSND (attr2
) != 0))
18482 list_to_add
= &global_symbols
;
18484 list_to_add
= cu
->list_in_scope
;
18488 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
18491 var_decode_location (attr
, sym
, cu
);
18492 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18494 /* Fortran explicitly imports any global symbols to the local
18495 scope by DW_TAG_common_block. */
18496 if (cu
->language
== language_fortran
&& die
->parent
18497 && die
->parent
->tag
== DW_TAG_common_block
)
18500 if (SYMBOL_CLASS (sym
) == LOC_STATIC
18501 && SYMBOL_VALUE_ADDRESS (sym
) == 0
18502 && !dwarf2_per_objfile
->has_section_at_zero
)
18504 /* When a static variable is eliminated by the linker,
18505 the corresponding debug information is not stripped
18506 out, but the variable address is set to null;
18507 do not add such variables into symbol table. */
18509 else if (attr2
&& (DW_UNSND (attr2
) != 0))
18511 /* Workaround gfortran PR debug/40040 - it uses
18512 DW_AT_location for variables in -fPIC libraries which may
18513 get overriden by other libraries/executable and get
18514 a different address. Resolve it by the minimal symbol
18515 which may come from inferior's executable using copy
18516 relocation. Make this workaround only for gfortran as for
18517 other compilers GDB cannot guess the minimal symbol
18518 Fortran mangling kind. */
18519 if (cu
->language
== language_fortran
&& die
->parent
18520 && die
->parent
->tag
== DW_TAG_module
18522 && startswith (cu
->producer
, "GNU Fortran"))
18523 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
18525 /* A variable with DW_AT_external is never static,
18526 but it may be block-scoped. */
18527 list_to_add
= (cu
->list_in_scope
== &file_symbols
18528 ? &global_symbols
: cu
->list_in_scope
);
18531 list_to_add
= cu
->list_in_scope
;
18535 /* We do not know the address of this symbol.
18536 If it is an external symbol and we have type information
18537 for it, enter the symbol as a LOC_UNRESOLVED symbol.
18538 The address of the variable will then be determined from
18539 the minimal symbol table whenever the variable is
18541 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18543 /* Fortran explicitly imports any global symbols to the local
18544 scope by DW_TAG_common_block. */
18545 if (cu
->language
== language_fortran
&& die
->parent
18546 && die
->parent
->tag
== DW_TAG_common_block
)
18548 /* SYMBOL_CLASS doesn't matter here because
18549 read_common_block is going to reset it. */
18551 list_to_add
= cu
->list_in_scope
;
18553 else if (attr2
&& (DW_UNSND (attr2
) != 0)
18554 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
18556 /* A variable with DW_AT_external is never static, but it
18557 may be block-scoped. */
18558 list_to_add
= (cu
->list_in_scope
== &file_symbols
18559 ? &global_symbols
: cu
->list_in_scope
);
18561 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
18563 else if (!die_is_declaration (die
, cu
))
18565 /* Use the default LOC_OPTIMIZED_OUT class. */
18566 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
18568 list_to_add
= cu
->list_in_scope
;
18572 case DW_TAG_formal_parameter
:
18573 /* If we are inside a function, mark this as an argument. If
18574 not, we might be looking at an argument to an inlined function
18575 when we do not have enough information to show inlined frames;
18576 pretend it's a local variable in that case so that the user can
18578 if (context_stack_depth
> 0
18579 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
18580 SYMBOL_IS_ARGUMENT (sym
) = 1;
18581 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
18584 var_decode_location (attr
, sym
, cu
);
18586 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18589 dwarf2_const_value (attr
, sym
, cu
);
18592 list_to_add
= cu
->list_in_scope
;
18594 case DW_TAG_unspecified_parameters
:
18595 /* From varargs functions; gdb doesn't seem to have any
18596 interest in this information, so just ignore it for now.
18599 case DW_TAG_template_type_param
:
18601 /* Fall through. */
18602 case DW_TAG_class_type
:
18603 case DW_TAG_interface_type
:
18604 case DW_TAG_structure_type
:
18605 case DW_TAG_union_type
:
18606 case DW_TAG_set_type
:
18607 case DW_TAG_enumeration_type
:
18608 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18609 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
18612 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
18613 really ever be static objects: otherwise, if you try
18614 to, say, break of a class's method and you're in a file
18615 which doesn't mention that class, it won't work unless
18616 the check for all static symbols in lookup_symbol_aux
18617 saves you. See the OtherFileClass tests in
18618 gdb.c++/namespace.exp. */
18622 list_to_add
= (cu
->list_in_scope
== &file_symbols
18623 && cu
->language
== language_cplus
18624 ? &global_symbols
: cu
->list_in_scope
);
18626 /* The semantics of C++ state that "struct foo {
18627 ... }" also defines a typedef for "foo". */
18628 if (cu
->language
== language_cplus
18629 || cu
->language
== language_ada
18630 || cu
->language
== language_d
18631 || cu
->language
== language_rust
)
18633 /* The symbol's name is already allocated along
18634 with this objfile, so we don't need to
18635 duplicate it for the type. */
18636 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
18637 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
18642 case DW_TAG_typedef
:
18643 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18644 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18645 list_to_add
= cu
->list_in_scope
;
18647 case DW_TAG_base_type
:
18648 case DW_TAG_subrange_type
:
18649 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18650 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18651 list_to_add
= cu
->list_in_scope
;
18653 case DW_TAG_enumerator
:
18654 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18657 dwarf2_const_value (attr
, sym
, cu
);
18660 /* NOTE: carlton/2003-11-10: See comment above in the
18661 DW_TAG_class_type, etc. block. */
18663 list_to_add
= (cu
->list_in_scope
== &file_symbols
18664 && cu
->language
== language_cplus
18665 ? &global_symbols
: cu
->list_in_scope
);
18668 case DW_TAG_imported_declaration
:
18669 case DW_TAG_namespace
:
18670 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18671 list_to_add
= &global_symbols
;
18673 case DW_TAG_module
:
18674 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18675 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
18676 list_to_add
= &global_symbols
;
18678 case DW_TAG_common_block
:
18679 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
18680 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
18681 add_symbol_to_list (sym
, cu
->list_in_scope
);
18684 /* Not a tag we recognize. Hopefully we aren't processing
18685 trash data, but since we must specifically ignore things
18686 we don't recognize, there is nothing else we should do at
18688 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
18689 dwarf_tag_name (die
->tag
));
18695 sym
->hash_next
= objfile
->template_symbols
;
18696 objfile
->template_symbols
= sym
;
18697 list_to_add
= NULL
;
18700 if (list_to_add
!= NULL
)
18701 add_symbol_to_list (sym
, list_to_add
);
18703 /* For the benefit of old versions of GCC, check for anonymous
18704 namespaces based on the demangled name. */
18705 if (!cu
->processing_has_namespace_info
18706 && cu
->language
== language_cplus
)
18707 cp_scan_for_anonymous_namespaces (sym
, objfile
);
18712 /* A wrapper for new_symbol_full that always allocates a new symbol. */
18714 static struct symbol
*
18715 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
18717 return new_symbol_full (die
, type
, cu
, NULL
);
18720 /* Given an attr with a DW_FORM_dataN value in host byte order,
18721 zero-extend it as appropriate for the symbol's type. The DWARF
18722 standard (v4) is not entirely clear about the meaning of using
18723 DW_FORM_dataN for a constant with a signed type, where the type is
18724 wider than the data. The conclusion of a discussion on the DWARF
18725 list was that this is unspecified. We choose to always zero-extend
18726 because that is the interpretation long in use by GCC. */
18729 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
18730 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
18732 struct objfile
*objfile
= cu
->objfile
;
18733 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
18734 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
18735 LONGEST l
= DW_UNSND (attr
);
18737 if (bits
< sizeof (*value
) * 8)
18739 l
&= ((LONGEST
) 1 << bits
) - 1;
18742 else if (bits
== sizeof (*value
) * 8)
18746 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
18747 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
18754 /* Read a constant value from an attribute. Either set *VALUE, or if
18755 the value does not fit in *VALUE, set *BYTES - either already
18756 allocated on the objfile obstack, or newly allocated on OBSTACK,
18757 or, set *BATON, if we translated the constant to a location
18761 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
18762 const char *name
, struct obstack
*obstack
,
18763 struct dwarf2_cu
*cu
,
18764 LONGEST
*value
, const gdb_byte
**bytes
,
18765 struct dwarf2_locexpr_baton
**baton
)
18767 struct objfile
*objfile
= cu
->objfile
;
18768 struct comp_unit_head
*cu_header
= &cu
->header
;
18769 struct dwarf_block
*blk
;
18770 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
18771 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
18777 switch (attr
->form
)
18780 case DW_FORM_GNU_addr_index
:
18784 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
18785 dwarf2_const_value_length_mismatch_complaint (name
,
18786 cu_header
->addr_size
,
18787 TYPE_LENGTH (type
));
18788 /* Symbols of this form are reasonably rare, so we just
18789 piggyback on the existing location code rather than writing
18790 a new implementation of symbol_computed_ops. */
18791 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
18792 (*baton
)->per_cu
= cu
->per_cu
;
18793 gdb_assert ((*baton
)->per_cu
);
18795 (*baton
)->size
= 2 + cu_header
->addr_size
;
18796 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
18797 (*baton
)->data
= data
;
18799 data
[0] = DW_OP_addr
;
18800 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
18801 byte_order
, DW_ADDR (attr
));
18802 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
18805 case DW_FORM_string
:
18807 case DW_FORM_GNU_str_index
:
18808 case DW_FORM_GNU_strp_alt
:
18809 /* DW_STRING is already allocated on the objfile obstack, point
18811 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
18813 case DW_FORM_block1
:
18814 case DW_FORM_block2
:
18815 case DW_FORM_block4
:
18816 case DW_FORM_block
:
18817 case DW_FORM_exprloc
:
18818 blk
= DW_BLOCK (attr
);
18819 if (TYPE_LENGTH (type
) != blk
->size
)
18820 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
18821 TYPE_LENGTH (type
));
18822 *bytes
= blk
->data
;
18825 /* The DW_AT_const_value attributes are supposed to carry the
18826 symbol's value "represented as it would be on the target
18827 architecture." By the time we get here, it's already been
18828 converted to host endianness, so we just need to sign- or
18829 zero-extend it as appropriate. */
18830 case DW_FORM_data1
:
18831 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
18833 case DW_FORM_data2
:
18834 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
18836 case DW_FORM_data4
:
18837 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
18839 case DW_FORM_data8
:
18840 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
18843 case DW_FORM_sdata
:
18844 *value
= DW_SND (attr
);
18847 case DW_FORM_udata
:
18848 *value
= DW_UNSND (attr
);
18852 complaint (&symfile_complaints
,
18853 _("unsupported const value attribute form: '%s'"),
18854 dwarf_form_name (attr
->form
));
18861 /* Copy constant value from an attribute to a symbol. */
18864 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
18865 struct dwarf2_cu
*cu
)
18867 struct objfile
*objfile
= cu
->objfile
;
18869 const gdb_byte
*bytes
;
18870 struct dwarf2_locexpr_baton
*baton
;
18872 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
18873 SYMBOL_PRINT_NAME (sym
),
18874 &objfile
->objfile_obstack
, cu
,
18875 &value
, &bytes
, &baton
);
18879 SYMBOL_LOCATION_BATON (sym
) = baton
;
18880 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
18882 else if (bytes
!= NULL
)
18884 SYMBOL_VALUE_BYTES (sym
) = bytes
;
18885 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
18889 SYMBOL_VALUE (sym
) = value
;
18890 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
18894 /* Return the type of the die in question using its DW_AT_type attribute. */
18896 static struct type
*
18897 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18899 struct attribute
*type_attr
;
18901 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
18904 /* A missing DW_AT_type represents a void type. */
18905 return objfile_type (cu
->objfile
)->builtin_void
;
18908 return lookup_die_type (die
, type_attr
, cu
);
18911 /* True iff CU's producer generates GNAT Ada auxiliary information
18912 that allows to find parallel types through that information instead
18913 of having to do expensive parallel lookups by type name. */
18916 need_gnat_info (struct dwarf2_cu
*cu
)
18918 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
18919 of GNAT produces this auxiliary information, without any indication
18920 that it is produced. Part of enhancing the FSF version of GNAT
18921 to produce that information will be to put in place an indicator
18922 that we can use in order to determine whether the descriptive type
18923 info is available or not. One suggestion that has been made is
18924 to use a new attribute, attached to the CU die. For now, assume
18925 that the descriptive type info is not available. */
18929 /* Return the auxiliary type of the die in question using its
18930 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
18931 attribute is not present. */
18933 static struct type
*
18934 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18936 struct attribute
*type_attr
;
18938 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
18942 return lookup_die_type (die
, type_attr
, cu
);
18945 /* If DIE has a descriptive_type attribute, then set the TYPE's
18946 descriptive type accordingly. */
18949 set_descriptive_type (struct type
*type
, struct die_info
*die
,
18950 struct dwarf2_cu
*cu
)
18952 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
18954 if (descriptive_type
)
18956 ALLOCATE_GNAT_AUX_TYPE (type
);
18957 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
18961 /* Return the containing type of the die in question using its
18962 DW_AT_containing_type attribute. */
18964 static struct type
*
18965 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18967 struct attribute
*type_attr
;
18969 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
18971 error (_("Dwarf Error: Problem turning containing type into gdb type "
18972 "[in module %s]"), objfile_name (cu
->objfile
));
18974 return lookup_die_type (die
, type_attr
, cu
);
18977 /* Return an error marker type to use for the ill formed type in DIE/CU. */
18979 static struct type
*
18980 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
18982 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18983 char *message
, *saved
;
18985 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
18986 objfile_name (objfile
),
18987 cu
->header
.offset
.sect_off
,
18988 die
->offset
.sect_off
);
18989 saved
= (char *) obstack_copy0 (&objfile
->objfile_obstack
,
18990 message
, strlen (message
));
18993 return init_type (objfile
, TYPE_CODE_ERROR
, 0, saved
);
18996 /* Look up the type of DIE in CU using its type attribute ATTR.
18997 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
18998 DW_AT_containing_type.
18999 If there is no type substitute an error marker. */
19001 static struct type
*
19002 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
19003 struct dwarf2_cu
*cu
)
19005 struct objfile
*objfile
= cu
->objfile
;
19006 struct type
*this_type
;
19008 gdb_assert (attr
->name
== DW_AT_type
19009 || attr
->name
== DW_AT_GNAT_descriptive_type
19010 || attr
->name
== DW_AT_containing_type
);
19012 /* First see if we have it cached. */
19014 if (attr
->form
== DW_FORM_GNU_ref_alt
)
19016 struct dwarf2_per_cu_data
*per_cu
;
19017 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
19019 per_cu
= dwarf2_find_containing_comp_unit (offset
, 1, cu
->objfile
);
19020 this_type
= get_die_type_at_offset (offset
, per_cu
);
19022 else if (attr_form_is_ref (attr
))
19024 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
19026 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
19028 else if (attr
->form
== DW_FORM_ref_sig8
)
19030 ULONGEST signature
= DW_SIGNATURE (attr
);
19032 return get_signatured_type (die
, signature
, cu
);
19036 complaint (&symfile_complaints
,
19037 _("Dwarf Error: Bad type attribute %s in DIE"
19038 " at 0x%x [in module %s]"),
19039 dwarf_attr_name (attr
->name
), die
->offset
.sect_off
,
19040 objfile_name (objfile
));
19041 return build_error_marker_type (cu
, die
);
19044 /* If not cached we need to read it in. */
19046 if (this_type
== NULL
)
19048 struct die_info
*type_die
= NULL
;
19049 struct dwarf2_cu
*type_cu
= cu
;
19051 if (attr_form_is_ref (attr
))
19052 type_die
= follow_die_ref (die
, attr
, &type_cu
);
19053 if (type_die
== NULL
)
19054 return build_error_marker_type (cu
, die
);
19055 /* If we find the type now, it's probably because the type came
19056 from an inter-CU reference and the type's CU got expanded before
19058 this_type
= read_type_die (type_die
, type_cu
);
19061 /* If we still don't have a type use an error marker. */
19063 if (this_type
== NULL
)
19064 return build_error_marker_type (cu
, die
);
19069 /* Return the type in DIE, CU.
19070 Returns NULL for invalid types.
19072 This first does a lookup in die_type_hash,
19073 and only reads the die in if necessary.
19075 NOTE: This can be called when reading in partial or full symbols. */
19077 static struct type
*
19078 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
19080 struct type
*this_type
;
19082 this_type
= get_die_type (die
, cu
);
19086 return read_type_die_1 (die
, cu
);
19089 /* Read the type in DIE, CU.
19090 Returns NULL for invalid types. */
19092 static struct type
*
19093 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
19095 struct type
*this_type
= NULL
;
19099 case DW_TAG_class_type
:
19100 case DW_TAG_interface_type
:
19101 case DW_TAG_structure_type
:
19102 case DW_TAG_union_type
:
19103 this_type
= read_structure_type (die
, cu
);
19105 case DW_TAG_enumeration_type
:
19106 this_type
= read_enumeration_type (die
, cu
);
19108 case DW_TAG_subprogram
:
19109 case DW_TAG_subroutine_type
:
19110 case DW_TAG_inlined_subroutine
:
19111 this_type
= read_subroutine_type (die
, cu
);
19113 case DW_TAG_array_type
:
19114 this_type
= read_array_type (die
, cu
);
19116 case DW_TAG_set_type
:
19117 this_type
= read_set_type (die
, cu
);
19119 case DW_TAG_pointer_type
:
19120 this_type
= read_tag_pointer_type (die
, cu
);
19122 case DW_TAG_ptr_to_member_type
:
19123 this_type
= read_tag_ptr_to_member_type (die
, cu
);
19125 case DW_TAG_reference_type
:
19126 this_type
= read_tag_reference_type (die
, cu
);
19128 case DW_TAG_const_type
:
19129 this_type
= read_tag_const_type (die
, cu
);
19131 case DW_TAG_volatile_type
:
19132 this_type
= read_tag_volatile_type (die
, cu
);
19134 case DW_TAG_restrict_type
:
19135 this_type
= read_tag_restrict_type (die
, cu
);
19137 case DW_TAG_string_type
:
19138 this_type
= read_tag_string_type (die
, cu
);
19140 case DW_TAG_typedef
:
19141 this_type
= read_typedef (die
, cu
);
19143 case DW_TAG_subrange_type
:
19144 this_type
= read_subrange_type (die
, cu
);
19146 case DW_TAG_base_type
:
19147 this_type
= read_base_type (die
, cu
);
19149 case DW_TAG_unspecified_type
:
19150 this_type
= read_unspecified_type (die
, cu
);
19152 case DW_TAG_namespace
:
19153 this_type
= read_namespace_type (die
, cu
);
19155 case DW_TAG_module
:
19156 this_type
= read_module_type (die
, cu
);
19158 case DW_TAG_atomic_type
:
19159 this_type
= read_tag_atomic_type (die
, cu
);
19162 complaint (&symfile_complaints
,
19163 _("unexpected tag in read_type_die: '%s'"),
19164 dwarf_tag_name (die
->tag
));
19171 /* See if we can figure out if the class lives in a namespace. We do
19172 this by looking for a member function; its demangled name will
19173 contain namespace info, if there is any.
19174 Return the computed name or NULL.
19175 Space for the result is allocated on the objfile's obstack.
19176 This is the full-die version of guess_partial_die_structure_name.
19177 In this case we know DIE has no useful parent. */
19180 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19182 struct die_info
*spec_die
;
19183 struct dwarf2_cu
*spec_cu
;
19184 struct die_info
*child
;
19187 spec_die
= die_specification (die
, &spec_cu
);
19188 if (spec_die
!= NULL
)
19194 for (child
= die
->child
;
19196 child
= child
->sibling
)
19198 if (child
->tag
== DW_TAG_subprogram
)
19200 const char *linkage_name
;
19202 linkage_name
= dwarf2_string_attr (child
, DW_AT_linkage_name
, cu
);
19203 if (linkage_name
== NULL
)
19204 linkage_name
= dwarf2_string_attr (child
, DW_AT_MIPS_linkage_name
,
19206 if (linkage_name
!= NULL
)
19209 = language_class_name_from_physname (cu
->language_defn
,
19213 if (actual_name
!= NULL
)
19215 const char *die_name
= dwarf2_name (die
, cu
);
19217 if (die_name
!= NULL
19218 && strcmp (die_name
, actual_name
) != 0)
19220 /* Strip off the class name from the full name.
19221 We want the prefix. */
19222 int die_name_len
= strlen (die_name
);
19223 int actual_name_len
= strlen (actual_name
);
19225 /* Test for '::' as a sanity check. */
19226 if (actual_name_len
> die_name_len
+ 2
19227 && actual_name
[actual_name_len
19228 - die_name_len
- 1] == ':')
19229 name
= (char *) obstack_copy0 (
19230 &cu
->objfile
->per_bfd
->storage_obstack
,
19231 actual_name
, actual_name_len
- die_name_len
- 2);
19234 xfree (actual_name
);
19243 /* GCC might emit a nameless typedef that has a linkage name. Determine the
19244 prefix part in such case. See
19245 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
19248 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
19250 struct attribute
*attr
;
19253 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
19254 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
19257 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
19260 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
19262 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
19263 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
19266 /* dwarf2_name had to be already called. */
19267 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
19269 /* Strip the base name, keep any leading namespaces/classes. */
19270 base
= strrchr (DW_STRING (attr
), ':');
19271 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
19274 return (char *) obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
19276 &base
[-1] - DW_STRING (attr
));
19279 /* Return the name of the namespace/class that DIE is defined within,
19280 or "" if we can't tell. The caller should not xfree the result.
19282 For example, if we're within the method foo() in the following
19292 then determine_prefix on foo's die will return "N::C". */
19294 static const char *
19295 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
19297 struct die_info
*parent
, *spec_die
;
19298 struct dwarf2_cu
*spec_cu
;
19299 struct type
*parent_type
;
19302 if (cu
->language
!= language_cplus
19303 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
19304 && cu
->language
!= language_rust
)
19307 retval
= anonymous_struct_prefix (die
, cu
);
19311 /* We have to be careful in the presence of DW_AT_specification.
19312 For example, with GCC 3.4, given the code
19316 // Definition of N::foo.
19320 then we'll have a tree of DIEs like this:
19322 1: DW_TAG_compile_unit
19323 2: DW_TAG_namespace // N
19324 3: DW_TAG_subprogram // declaration of N::foo
19325 4: DW_TAG_subprogram // definition of N::foo
19326 DW_AT_specification // refers to die #3
19328 Thus, when processing die #4, we have to pretend that we're in
19329 the context of its DW_AT_specification, namely the contex of die
19332 spec_die
= die_specification (die
, &spec_cu
);
19333 if (spec_die
== NULL
)
19334 parent
= die
->parent
;
19337 parent
= spec_die
->parent
;
19341 if (parent
== NULL
)
19343 else if (parent
->building_fullname
)
19346 const char *parent_name
;
19348 /* It has been seen on RealView 2.2 built binaries,
19349 DW_TAG_template_type_param types actually _defined_ as
19350 children of the parent class:
19353 template class <class Enum> Class{};
19354 Class<enum E> class_e;
19356 1: DW_TAG_class_type (Class)
19357 2: DW_TAG_enumeration_type (E)
19358 3: DW_TAG_enumerator (enum1:0)
19359 3: DW_TAG_enumerator (enum2:1)
19361 2: DW_TAG_template_type_param
19362 DW_AT_type DW_FORM_ref_udata (E)
19364 Besides being broken debug info, it can put GDB into an
19365 infinite loop. Consider:
19367 When we're building the full name for Class<E>, we'll start
19368 at Class, and go look over its template type parameters,
19369 finding E. We'll then try to build the full name of E, and
19370 reach here. We're now trying to build the full name of E,
19371 and look over the parent DIE for containing scope. In the
19372 broken case, if we followed the parent DIE of E, we'd again
19373 find Class, and once again go look at its template type
19374 arguments, etc., etc. Simply don't consider such parent die
19375 as source-level parent of this die (it can't be, the language
19376 doesn't allow it), and break the loop here. */
19377 name
= dwarf2_name (die
, cu
);
19378 parent_name
= dwarf2_name (parent
, cu
);
19379 complaint (&symfile_complaints
,
19380 _("template param type '%s' defined within parent '%s'"),
19381 name
? name
: "<unknown>",
19382 parent_name
? parent_name
: "<unknown>");
19386 switch (parent
->tag
)
19388 case DW_TAG_namespace
:
19389 parent_type
= read_type_die (parent
, cu
);
19390 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
19391 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
19392 Work around this problem here. */
19393 if (cu
->language
== language_cplus
19394 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
19396 /* We give a name to even anonymous namespaces. */
19397 return TYPE_TAG_NAME (parent_type
);
19398 case DW_TAG_class_type
:
19399 case DW_TAG_interface_type
:
19400 case DW_TAG_structure_type
:
19401 case DW_TAG_union_type
:
19402 case DW_TAG_module
:
19403 parent_type
= read_type_die (parent
, cu
);
19404 if (TYPE_TAG_NAME (parent_type
) != NULL
)
19405 return TYPE_TAG_NAME (parent_type
);
19407 /* An anonymous structure is only allowed non-static data
19408 members; no typedefs, no member functions, et cetera.
19409 So it does not need a prefix. */
19411 case DW_TAG_compile_unit
:
19412 case DW_TAG_partial_unit
:
19413 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
19414 if (cu
->language
== language_cplus
19415 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
19416 && die
->child
!= NULL
19417 && (die
->tag
== DW_TAG_class_type
19418 || die
->tag
== DW_TAG_structure_type
19419 || die
->tag
== DW_TAG_union_type
))
19421 char *name
= guess_full_die_structure_name (die
, cu
);
19426 case DW_TAG_enumeration_type
:
19427 parent_type
= read_type_die (parent
, cu
);
19428 if (TYPE_DECLARED_CLASS (parent_type
))
19430 if (TYPE_TAG_NAME (parent_type
) != NULL
)
19431 return TYPE_TAG_NAME (parent_type
);
19434 /* Fall through. */
19436 return determine_prefix (parent
, cu
);
19440 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
19441 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
19442 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
19443 an obconcat, otherwise allocate storage for the result. The CU argument is
19444 used to determine the language and hence, the appropriate separator. */
19446 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
19449 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
19450 int physname
, struct dwarf2_cu
*cu
)
19452 const char *lead
= "";
19455 if (suffix
== NULL
|| suffix
[0] == '\0'
19456 || prefix
== NULL
|| prefix
[0] == '\0')
19458 else if (cu
->language
== language_d
)
19460 /* For D, the 'main' function could be defined in any module, but it
19461 should never be prefixed. */
19462 if (strcmp (suffix
, "D main") == 0)
19470 else if (cu
->language
== language_fortran
&& physname
)
19472 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
19473 DW_AT_MIPS_linkage_name is preferred and used instead. */
19481 if (prefix
== NULL
)
19483 if (suffix
== NULL
)
19490 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
19492 strcpy (retval
, lead
);
19493 strcat (retval
, prefix
);
19494 strcat (retval
, sep
);
19495 strcat (retval
, suffix
);
19500 /* We have an obstack. */
19501 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
19505 /* Return sibling of die, NULL if no sibling. */
19507 static struct die_info
*
19508 sibling_die (struct die_info
*die
)
19510 return die
->sibling
;
19513 /* Get name of a die, return NULL if not found. */
19515 static const char *
19516 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
19517 struct obstack
*obstack
)
19519 if (name
&& cu
->language
== language_cplus
)
19521 std::string canon_name
= cp_canonicalize_string (name
);
19523 if (!canon_name
.empty ())
19525 if (canon_name
!= name
)
19526 name
= (const char *) obstack_copy0 (obstack
,
19527 canon_name
.c_str (),
19528 canon_name
.length ());
19535 /* Get name of a die, return NULL if not found.
19536 Anonymous namespaces are converted to their magic string. */
19538 static const char *
19539 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19541 struct attribute
*attr
;
19543 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
19544 if ((!attr
|| !DW_STRING (attr
))
19545 && die
->tag
!= DW_TAG_namespace
19546 && die
->tag
!= DW_TAG_class_type
19547 && die
->tag
!= DW_TAG_interface_type
19548 && die
->tag
!= DW_TAG_structure_type
19549 && die
->tag
!= DW_TAG_union_type
)
19554 case DW_TAG_compile_unit
:
19555 case DW_TAG_partial_unit
:
19556 /* Compilation units have a DW_AT_name that is a filename, not
19557 a source language identifier. */
19558 case DW_TAG_enumeration_type
:
19559 case DW_TAG_enumerator
:
19560 /* These tags always have simple identifiers already; no need
19561 to canonicalize them. */
19562 return DW_STRING (attr
);
19564 case DW_TAG_namespace
:
19565 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
19566 return DW_STRING (attr
);
19567 return CP_ANONYMOUS_NAMESPACE_STR
;
19569 case DW_TAG_class_type
:
19570 case DW_TAG_interface_type
:
19571 case DW_TAG_structure_type
:
19572 case DW_TAG_union_type
:
19573 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
19574 structures or unions. These were of the form "._%d" in GCC 4.1,
19575 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
19576 and GCC 4.4. We work around this problem by ignoring these. */
19577 if (attr
&& DW_STRING (attr
)
19578 && (startswith (DW_STRING (attr
), "._")
19579 || startswith (DW_STRING (attr
), "<anonymous")))
19582 /* GCC might emit a nameless typedef that has a linkage name. See
19583 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
19584 if (!attr
|| DW_STRING (attr
) == NULL
)
19586 char *demangled
= NULL
;
19588 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
19590 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
19592 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
19595 /* Avoid demangling DW_STRING (attr) the second time on a second
19596 call for the same DIE. */
19597 if (!DW_STRING_IS_CANONICAL (attr
))
19598 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
19604 /* FIXME: we already did this for the partial symbol... */
19607 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
19608 demangled
, strlen (demangled
)));
19609 DW_STRING_IS_CANONICAL (attr
) = 1;
19612 /* Strip any leading namespaces/classes, keep only the base name.
19613 DW_AT_name for named DIEs does not contain the prefixes. */
19614 base
= strrchr (DW_STRING (attr
), ':');
19615 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
19618 return DW_STRING (attr
);
19627 if (!DW_STRING_IS_CANONICAL (attr
))
19630 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
19631 &cu
->objfile
->per_bfd
->storage_obstack
);
19632 DW_STRING_IS_CANONICAL (attr
) = 1;
19634 return DW_STRING (attr
);
19637 /* Return the die that this die in an extension of, or NULL if there
19638 is none. *EXT_CU is the CU containing DIE on input, and the CU
19639 containing the return value on output. */
19641 static struct die_info
*
19642 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
19644 struct attribute
*attr
;
19646 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
19650 return follow_die_ref (die
, attr
, ext_cu
);
19653 /* Convert a DIE tag into its string name. */
19655 static const char *
19656 dwarf_tag_name (unsigned tag
)
19658 const char *name
= get_DW_TAG_name (tag
);
19661 return "DW_TAG_<unknown>";
19666 /* Convert a DWARF attribute code into its string name. */
19668 static const char *
19669 dwarf_attr_name (unsigned attr
)
19673 #ifdef MIPS /* collides with DW_AT_HP_block_index */
19674 if (attr
== DW_AT_MIPS_fde
)
19675 return "DW_AT_MIPS_fde";
19677 if (attr
== DW_AT_HP_block_index
)
19678 return "DW_AT_HP_block_index";
19681 name
= get_DW_AT_name (attr
);
19684 return "DW_AT_<unknown>";
19689 /* Convert a DWARF value form code into its string name. */
19691 static const char *
19692 dwarf_form_name (unsigned form
)
19694 const char *name
= get_DW_FORM_name (form
);
19697 return "DW_FORM_<unknown>";
19703 dwarf_bool_name (unsigned mybool
)
19711 /* Convert a DWARF type code into its string name. */
19713 static const char *
19714 dwarf_type_encoding_name (unsigned enc
)
19716 const char *name
= get_DW_ATE_name (enc
);
19719 return "DW_ATE_<unknown>";
19725 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
19729 print_spaces (indent
, f
);
19730 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
19731 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
.sect_off
);
19733 if (die
->parent
!= NULL
)
19735 print_spaces (indent
, f
);
19736 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
19737 die
->parent
->offset
.sect_off
);
19740 print_spaces (indent
, f
);
19741 fprintf_unfiltered (f
, " has children: %s\n",
19742 dwarf_bool_name (die
->child
!= NULL
));
19744 print_spaces (indent
, f
);
19745 fprintf_unfiltered (f
, " attributes:\n");
19747 for (i
= 0; i
< die
->num_attrs
; ++i
)
19749 print_spaces (indent
, f
);
19750 fprintf_unfiltered (f
, " %s (%s) ",
19751 dwarf_attr_name (die
->attrs
[i
].name
),
19752 dwarf_form_name (die
->attrs
[i
].form
));
19754 switch (die
->attrs
[i
].form
)
19757 case DW_FORM_GNU_addr_index
:
19758 fprintf_unfiltered (f
, "address: ");
19759 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
19761 case DW_FORM_block2
:
19762 case DW_FORM_block4
:
19763 case DW_FORM_block
:
19764 case DW_FORM_block1
:
19765 fprintf_unfiltered (f
, "block: size %s",
19766 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
19768 case DW_FORM_exprloc
:
19769 fprintf_unfiltered (f
, "expression: size %s",
19770 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
19772 case DW_FORM_ref_addr
:
19773 fprintf_unfiltered (f
, "ref address: ");
19774 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
19776 case DW_FORM_GNU_ref_alt
:
19777 fprintf_unfiltered (f
, "alt ref address: ");
19778 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
19784 case DW_FORM_ref_udata
:
19785 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
19786 (long) (DW_UNSND (&die
->attrs
[i
])));
19788 case DW_FORM_data1
:
19789 case DW_FORM_data2
:
19790 case DW_FORM_data4
:
19791 case DW_FORM_data8
:
19792 case DW_FORM_udata
:
19793 case DW_FORM_sdata
:
19794 fprintf_unfiltered (f
, "constant: %s",
19795 pulongest (DW_UNSND (&die
->attrs
[i
])));
19797 case DW_FORM_sec_offset
:
19798 fprintf_unfiltered (f
, "section offset: %s",
19799 pulongest (DW_UNSND (&die
->attrs
[i
])));
19801 case DW_FORM_ref_sig8
:
19802 fprintf_unfiltered (f
, "signature: %s",
19803 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
19805 case DW_FORM_string
:
19807 case DW_FORM_GNU_str_index
:
19808 case DW_FORM_GNU_strp_alt
:
19809 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
19810 DW_STRING (&die
->attrs
[i
])
19811 ? DW_STRING (&die
->attrs
[i
]) : "",
19812 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
19815 if (DW_UNSND (&die
->attrs
[i
]))
19816 fprintf_unfiltered (f
, "flag: TRUE");
19818 fprintf_unfiltered (f
, "flag: FALSE");
19820 case DW_FORM_flag_present
:
19821 fprintf_unfiltered (f
, "flag: TRUE");
19823 case DW_FORM_indirect
:
19824 /* The reader will have reduced the indirect form to
19825 the "base form" so this form should not occur. */
19826 fprintf_unfiltered (f
,
19827 "unexpected attribute form: DW_FORM_indirect");
19830 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
19831 die
->attrs
[i
].form
);
19834 fprintf_unfiltered (f
, "\n");
19839 dump_die_for_error (struct die_info
*die
)
19841 dump_die_shallow (gdb_stderr
, 0, die
);
19845 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
19847 int indent
= level
* 4;
19849 gdb_assert (die
!= NULL
);
19851 if (level
>= max_level
)
19854 dump_die_shallow (f
, indent
, die
);
19856 if (die
->child
!= NULL
)
19858 print_spaces (indent
, f
);
19859 fprintf_unfiltered (f
, " Children:");
19860 if (level
+ 1 < max_level
)
19862 fprintf_unfiltered (f
, "\n");
19863 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
19867 fprintf_unfiltered (f
,
19868 " [not printed, max nesting level reached]\n");
19872 if (die
->sibling
!= NULL
&& level
> 0)
19874 dump_die_1 (f
, level
, max_level
, die
->sibling
);
19878 /* This is called from the pdie macro in gdbinit.in.
19879 It's not static so gcc will keep a copy callable from gdb. */
19882 dump_die (struct die_info
*die
, int max_level
)
19884 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
19888 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
19892 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
.sect_off
,
19898 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
19902 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
19904 sect_offset retval
= { DW_UNSND (attr
) };
19906 if (attr_form_is_ref (attr
))
19909 retval
.sect_off
= 0;
19910 complaint (&symfile_complaints
,
19911 _("unsupported die ref attribute form: '%s'"),
19912 dwarf_form_name (attr
->form
));
19916 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
19917 * the value held by the attribute is not constant. */
19920 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
19922 if (attr
->form
== DW_FORM_sdata
)
19923 return DW_SND (attr
);
19924 else if (attr
->form
== DW_FORM_udata
19925 || attr
->form
== DW_FORM_data1
19926 || attr
->form
== DW_FORM_data2
19927 || attr
->form
== DW_FORM_data4
19928 || attr
->form
== DW_FORM_data8
)
19929 return DW_UNSND (attr
);
19932 complaint (&symfile_complaints
,
19933 _("Attribute value is not a constant (%s)"),
19934 dwarf_form_name (attr
->form
));
19935 return default_value
;
19939 /* Follow reference or signature attribute ATTR of SRC_DIE.
19940 On entry *REF_CU is the CU of SRC_DIE.
19941 On exit *REF_CU is the CU of the result. */
19943 static struct die_info
*
19944 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
19945 struct dwarf2_cu
**ref_cu
)
19947 struct die_info
*die
;
19949 if (attr_form_is_ref (attr
))
19950 die
= follow_die_ref (src_die
, attr
, ref_cu
);
19951 else if (attr
->form
== DW_FORM_ref_sig8
)
19952 die
= follow_die_sig (src_die
, attr
, ref_cu
);
19955 dump_die_for_error (src_die
);
19956 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
19957 objfile_name ((*ref_cu
)->objfile
));
19963 /* Follow reference OFFSET.
19964 On entry *REF_CU is the CU of the source die referencing OFFSET.
19965 On exit *REF_CU is the CU of the result.
19966 Returns NULL if OFFSET is invalid. */
19968 static struct die_info
*
19969 follow_die_offset (sect_offset offset
, int offset_in_dwz
,
19970 struct dwarf2_cu
**ref_cu
)
19972 struct die_info temp_die
;
19973 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
19975 gdb_assert (cu
->per_cu
!= NULL
);
19979 if (cu
->per_cu
->is_debug_types
)
19981 /* .debug_types CUs cannot reference anything outside their CU.
19982 If they need to, they have to reference a signatured type via
19983 DW_FORM_ref_sig8. */
19984 if (! offset_in_cu_p (&cu
->header
, offset
))
19987 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
19988 || ! offset_in_cu_p (&cu
->header
, offset
))
19990 struct dwarf2_per_cu_data
*per_cu
;
19992 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
19995 /* If necessary, add it to the queue and load its DIEs. */
19996 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
19997 load_full_comp_unit (per_cu
, cu
->language
);
19999 target_cu
= per_cu
->cu
;
20001 else if (cu
->dies
== NULL
)
20003 /* We're loading full DIEs during partial symbol reading. */
20004 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
20005 load_full_comp_unit (cu
->per_cu
, language_minimal
);
20008 *ref_cu
= target_cu
;
20009 temp_die
.offset
= offset
;
20010 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
20011 &temp_die
, offset
.sect_off
);
20014 /* Follow reference attribute ATTR of SRC_DIE.
20015 On entry *REF_CU is the CU of SRC_DIE.
20016 On exit *REF_CU is the CU of the result. */
20018 static struct die_info
*
20019 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
20020 struct dwarf2_cu
**ref_cu
)
20022 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
20023 struct dwarf2_cu
*cu
= *ref_cu
;
20024 struct die_info
*die
;
20026 die
= follow_die_offset (offset
,
20027 (attr
->form
== DW_FORM_GNU_ref_alt
20028 || cu
->per_cu
->is_dwz
),
20031 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
20032 "at 0x%x [in module %s]"),
20033 offset
.sect_off
, src_die
->offset
.sect_off
,
20034 objfile_name (cu
->objfile
));
20039 /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU.
20040 Returned value is intended for DW_OP_call*. Returned
20041 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
20043 struct dwarf2_locexpr_baton
20044 dwarf2_fetch_die_loc_sect_off (sect_offset offset
,
20045 struct dwarf2_per_cu_data
*per_cu
,
20046 CORE_ADDR (*get_frame_pc
) (void *baton
),
20049 struct dwarf2_cu
*cu
;
20050 struct die_info
*die
;
20051 struct attribute
*attr
;
20052 struct dwarf2_locexpr_baton retval
;
20054 dw2_setup (per_cu
->objfile
);
20056 if (per_cu
->cu
== NULL
)
20061 /* We shouldn't get here for a dummy CU, but don't crash on the user.
20062 Instead just throw an error, not much else we can do. */
20063 error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"),
20064 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20067 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
20069 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
20070 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20072 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
20075 /* DWARF: "If there is no such attribute, then there is no effect.".
20076 DATA is ignored if SIZE is 0. */
20078 retval
.data
= NULL
;
20081 else if (attr_form_is_section_offset (attr
))
20083 struct dwarf2_loclist_baton loclist_baton
;
20084 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
20087 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
20089 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
20091 retval
.size
= size
;
20095 if (!attr_form_is_block (attr
))
20096 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
20097 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
20098 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20100 retval
.data
= DW_BLOCK (attr
)->data
;
20101 retval
.size
= DW_BLOCK (attr
)->size
;
20103 retval
.per_cu
= cu
->per_cu
;
20105 age_cached_comp_units ();
20110 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
20113 struct dwarf2_locexpr_baton
20114 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
20115 struct dwarf2_per_cu_data
*per_cu
,
20116 CORE_ADDR (*get_frame_pc
) (void *baton
),
20119 sect_offset offset
= { per_cu
->offset
.sect_off
+ offset_in_cu
.cu_off
};
20121 return dwarf2_fetch_die_loc_sect_off (offset
, per_cu
, get_frame_pc
, baton
);
20124 /* Write a constant of a given type as target-ordered bytes into
20127 static const gdb_byte
*
20128 write_constant_as_bytes (struct obstack
*obstack
,
20129 enum bfd_endian byte_order
,
20136 *len
= TYPE_LENGTH (type
);
20137 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
20138 store_unsigned_integer (result
, *len
, byte_order
, value
);
20143 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
20144 pointer to the constant bytes and set LEN to the length of the
20145 data. If memory is needed, allocate it on OBSTACK. If the DIE
20146 does not have a DW_AT_const_value, return NULL. */
20149 dwarf2_fetch_constant_bytes (sect_offset offset
,
20150 struct dwarf2_per_cu_data
*per_cu
,
20151 struct obstack
*obstack
,
20154 struct dwarf2_cu
*cu
;
20155 struct die_info
*die
;
20156 struct attribute
*attr
;
20157 const gdb_byte
*result
= NULL
;
20160 enum bfd_endian byte_order
;
20162 dw2_setup (per_cu
->objfile
);
20164 if (per_cu
->cu
== NULL
)
20169 /* We shouldn't get here for a dummy CU, but don't crash on the user.
20170 Instead just throw an error, not much else we can do. */
20171 error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"),
20172 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20175 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
20177 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
20178 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20181 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20185 byte_order
= (bfd_big_endian (per_cu
->objfile
->obfd
)
20186 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
20188 switch (attr
->form
)
20191 case DW_FORM_GNU_addr_index
:
20195 *len
= cu
->header
.addr_size
;
20196 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
20197 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
20201 case DW_FORM_string
:
20203 case DW_FORM_GNU_str_index
:
20204 case DW_FORM_GNU_strp_alt
:
20205 /* DW_STRING is already allocated on the objfile obstack, point
20207 result
= (const gdb_byte
*) DW_STRING (attr
);
20208 *len
= strlen (DW_STRING (attr
));
20210 case DW_FORM_block1
:
20211 case DW_FORM_block2
:
20212 case DW_FORM_block4
:
20213 case DW_FORM_block
:
20214 case DW_FORM_exprloc
:
20215 result
= DW_BLOCK (attr
)->data
;
20216 *len
= DW_BLOCK (attr
)->size
;
20219 /* The DW_AT_const_value attributes are supposed to carry the
20220 symbol's value "represented as it would be on the target
20221 architecture." By the time we get here, it's already been
20222 converted to host endianness, so we just need to sign- or
20223 zero-extend it as appropriate. */
20224 case DW_FORM_data1
:
20225 type
= die_type (die
, cu
);
20226 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
20227 if (result
== NULL
)
20228 result
= write_constant_as_bytes (obstack
, byte_order
,
20231 case DW_FORM_data2
:
20232 type
= die_type (die
, cu
);
20233 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
20234 if (result
== NULL
)
20235 result
= write_constant_as_bytes (obstack
, byte_order
,
20238 case DW_FORM_data4
:
20239 type
= die_type (die
, cu
);
20240 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
20241 if (result
== NULL
)
20242 result
= write_constant_as_bytes (obstack
, byte_order
,
20245 case DW_FORM_data8
:
20246 type
= die_type (die
, cu
);
20247 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
20248 if (result
== NULL
)
20249 result
= write_constant_as_bytes (obstack
, byte_order
,
20253 case DW_FORM_sdata
:
20254 type
= die_type (die
, cu
);
20255 result
= write_constant_as_bytes (obstack
, byte_order
,
20256 type
, DW_SND (attr
), len
);
20259 case DW_FORM_udata
:
20260 type
= die_type (die
, cu
);
20261 result
= write_constant_as_bytes (obstack
, byte_order
,
20262 type
, DW_UNSND (attr
), len
);
20266 complaint (&symfile_complaints
,
20267 _("unsupported const value attribute form: '%s'"),
20268 dwarf_form_name (attr
->form
));
20275 /* Return the type of the DIE at DIE_OFFSET in the CU named by
20279 dwarf2_get_die_type (cu_offset die_offset
,
20280 struct dwarf2_per_cu_data
*per_cu
)
20282 sect_offset die_offset_sect
;
20284 dw2_setup (per_cu
->objfile
);
20286 die_offset_sect
.sect_off
= per_cu
->offset
.sect_off
+ die_offset
.cu_off
;
20287 return get_die_type_at_offset (die_offset_sect
, per_cu
);
20290 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
20291 On entry *REF_CU is the CU of SRC_DIE.
20292 On exit *REF_CU is the CU of the result.
20293 Returns NULL if the referenced DIE isn't found. */
20295 static struct die_info
*
20296 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
20297 struct dwarf2_cu
**ref_cu
)
20299 struct die_info temp_die
;
20300 struct dwarf2_cu
*sig_cu
;
20301 struct die_info
*die
;
20303 /* While it might be nice to assert sig_type->type == NULL here,
20304 we can get here for DW_AT_imported_declaration where we need
20305 the DIE not the type. */
20307 /* If necessary, add it to the queue and load its DIEs. */
20309 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
20310 read_signatured_type (sig_type
);
20312 sig_cu
= sig_type
->per_cu
.cu
;
20313 gdb_assert (sig_cu
!= NULL
);
20314 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
20315 temp_die
.offset
= sig_type
->type_offset_in_section
;
20316 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
20317 temp_die
.offset
.sect_off
);
20320 /* For .gdb_index version 7 keep track of included TUs.
20321 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
20322 if (dwarf2_per_objfile
->index_table
!= NULL
20323 && dwarf2_per_objfile
->index_table
->version
<= 7)
20325 VEC_safe_push (dwarf2_per_cu_ptr
,
20326 (*ref_cu
)->per_cu
->imported_symtabs
,
20337 /* Follow signatured type referenced by ATTR in SRC_DIE.
20338 On entry *REF_CU is the CU of SRC_DIE.
20339 On exit *REF_CU is the CU of the result.
20340 The result is the DIE of the type.
20341 If the referenced type cannot be found an error is thrown. */
20343 static struct die_info
*
20344 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
20345 struct dwarf2_cu
**ref_cu
)
20347 ULONGEST signature
= DW_SIGNATURE (attr
);
20348 struct signatured_type
*sig_type
;
20349 struct die_info
*die
;
20351 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
20353 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
20354 /* sig_type will be NULL if the signatured type is missing from
20356 if (sig_type
== NULL
)
20358 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
20359 " from DIE at 0x%x [in module %s]"),
20360 hex_string (signature
), src_die
->offset
.sect_off
,
20361 objfile_name ((*ref_cu
)->objfile
));
20364 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
20367 dump_die_for_error (src_die
);
20368 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
20369 " from DIE at 0x%x [in module %s]"),
20370 hex_string (signature
), src_die
->offset
.sect_off
,
20371 objfile_name ((*ref_cu
)->objfile
));
20377 /* Get the type specified by SIGNATURE referenced in DIE/CU,
20378 reading in and processing the type unit if necessary. */
20380 static struct type
*
20381 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
20382 struct dwarf2_cu
*cu
)
20384 struct signatured_type
*sig_type
;
20385 struct dwarf2_cu
*type_cu
;
20386 struct die_info
*type_die
;
20389 sig_type
= lookup_signatured_type (cu
, signature
);
20390 /* sig_type will be NULL if the signatured type is missing from
20392 if (sig_type
== NULL
)
20394 complaint (&symfile_complaints
,
20395 _("Dwarf Error: Cannot find signatured DIE %s referenced"
20396 " from DIE at 0x%x [in module %s]"),
20397 hex_string (signature
), die
->offset
.sect_off
,
20398 objfile_name (dwarf2_per_objfile
->objfile
));
20399 return build_error_marker_type (cu
, die
);
20402 /* If we already know the type we're done. */
20403 if (sig_type
->type
!= NULL
)
20404 return sig_type
->type
;
20407 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
20408 if (type_die
!= NULL
)
20410 /* N.B. We need to call get_die_type to ensure only one type for this DIE
20411 is created. This is important, for example, because for c++ classes
20412 we need TYPE_NAME set which is only done by new_symbol. Blech. */
20413 type
= read_type_die (type_die
, type_cu
);
20416 complaint (&symfile_complaints
,
20417 _("Dwarf Error: Cannot build signatured type %s"
20418 " referenced from DIE at 0x%x [in module %s]"),
20419 hex_string (signature
), die
->offset
.sect_off
,
20420 objfile_name (dwarf2_per_objfile
->objfile
));
20421 type
= build_error_marker_type (cu
, die
);
20426 complaint (&symfile_complaints
,
20427 _("Dwarf Error: Problem reading signatured DIE %s referenced"
20428 " from DIE at 0x%x [in module %s]"),
20429 hex_string (signature
), die
->offset
.sect_off
,
20430 objfile_name (dwarf2_per_objfile
->objfile
));
20431 type
= build_error_marker_type (cu
, die
);
20433 sig_type
->type
= type
;
20438 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
20439 reading in and processing the type unit if necessary. */
20441 static struct type
*
20442 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
20443 struct dwarf2_cu
*cu
) /* ARI: editCase function */
20445 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
20446 if (attr_form_is_ref (attr
))
20448 struct dwarf2_cu
*type_cu
= cu
;
20449 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
20451 return read_type_die (type_die
, type_cu
);
20453 else if (attr
->form
== DW_FORM_ref_sig8
)
20455 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
20459 complaint (&symfile_complaints
,
20460 _("Dwarf Error: DW_AT_signature has bad form %s in DIE"
20461 " at 0x%x [in module %s]"),
20462 dwarf_form_name (attr
->form
), die
->offset
.sect_off
,
20463 objfile_name (dwarf2_per_objfile
->objfile
));
20464 return build_error_marker_type (cu
, die
);
20468 /* Load the DIEs associated with type unit PER_CU into memory. */
20471 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
20473 struct signatured_type
*sig_type
;
20475 /* Caller is responsible for ensuring type_unit_groups don't get here. */
20476 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
20478 /* We have the per_cu, but we need the signatured_type.
20479 Fortunately this is an easy translation. */
20480 gdb_assert (per_cu
->is_debug_types
);
20481 sig_type
= (struct signatured_type
*) per_cu
;
20483 gdb_assert (per_cu
->cu
== NULL
);
20485 read_signatured_type (sig_type
);
20487 gdb_assert (per_cu
->cu
!= NULL
);
20490 /* die_reader_func for read_signatured_type.
20491 This is identical to load_full_comp_unit_reader,
20492 but is kept separate for now. */
20495 read_signatured_type_reader (const struct die_reader_specs
*reader
,
20496 const gdb_byte
*info_ptr
,
20497 struct die_info
*comp_unit_die
,
20501 struct dwarf2_cu
*cu
= reader
->cu
;
20503 gdb_assert (cu
->die_hash
== NULL
);
20505 htab_create_alloc_ex (cu
->header
.length
/ 12,
20509 &cu
->comp_unit_obstack
,
20510 hashtab_obstack_allocate
,
20511 dummy_obstack_deallocate
);
20514 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
20515 &info_ptr
, comp_unit_die
);
20516 cu
->dies
= comp_unit_die
;
20517 /* comp_unit_die is not stored in die_hash, no need. */
20519 /* We try not to read any attributes in this function, because not
20520 all CUs needed for references have been loaded yet, and symbol
20521 table processing isn't initialized. But we have to set the CU language,
20522 or we won't be able to build types correctly.
20523 Similarly, if we do not read the producer, we can not apply
20524 producer-specific interpretation. */
20525 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
20528 /* Read in a signatured type and build its CU and DIEs.
20529 If the type is a stub for the real type in a DWO file,
20530 read in the real type from the DWO file as well. */
20533 read_signatured_type (struct signatured_type
*sig_type
)
20535 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
20537 gdb_assert (per_cu
->is_debug_types
);
20538 gdb_assert (per_cu
->cu
== NULL
);
20540 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
20541 read_signatured_type_reader
, NULL
);
20542 sig_type
->per_cu
.tu_read
= 1;
20545 /* Decode simple location descriptions.
20546 Given a pointer to a dwarf block that defines a location, compute
20547 the location and return the value.
20549 NOTE drow/2003-11-18: This function is called in two situations
20550 now: for the address of static or global variables (partial symbols
20551 only) and for offsets into structures which are expected to be
20552 (more or less) constant. The partial symbol case should go away,
20553 and only the constant case should remain. That will let this
20554 function complain more accurately. A few special modes are allowed
20555 without complaint for global variables (for instance, global
20556 register values and thread-local values).
20558 A location description containing no operations indicates that the
20559 object is optimized out. The return value is 0 for that case.
20560 FIXME drow/2003-11-16: No callers check for this case any more; soon all
20561 callers will only want a very basic result and this can become a
20564 Note that stack[0] is unused except as a default error return. */
20567 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
20569 struct objfile
*objfile
= cu
->objfile
;
20571 size_t size
= blk
->size
;
20572 const gdb_byte
*data
= blk
->data
;
20573 CORE_ADDR stack
[64];
20575 unsigned int bytes_read
, unsnd
;
20581 stack
[++stacki
] = 0;
20620 stack
[++stacki
] = op
- DW_OP_lit0
;
20655 stack
[++stacki
] = op
- DW_OP_reg0
;
20657 dwarf2_complex_location_expr_complaint ();
20661 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
20663 stack
[++stacki
] = unsnd
;
20665 dwarf2_complex_location_expr_complaint ();
20669 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
20674 case DW_OP_const1u
:
20675 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
20679 case DW_OP_const1s
:
20680 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
20684 case DW_OP_const2u
:
20685 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
20689 case DW_OP_const2s
:
20690 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
20694 case DW_OP_const4u
:
20695 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
20699 case DW_OP_const4s
:
20700 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
20704 case DW_OP_const8u
:
20705 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
20710 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
20716 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
20721 stack
[stacki
+ 1] = stack
[stacki
];
20726 stack
[stacki
- 1] += stack
[stacki
];
20730 case DW_OP_plus_uconst
:
20731 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
20737 stack
[stacki
- 1] -= stack
[stacki
];
20742 /* If we're not the last op, then we definitely can't encode
20743 this using GDB's address_class enum. This is valid for partial
20744 global symbols, although the variable's address will be bogus
20747 dwarf2_complex_location_expr_complaint ();
20750 case DW_OP_GNU_push_tls_address
:
20751 case DW_OP_form_tls_address
:
20752 /* The top of the stack has the offset from the beginning
20753 of the thread control block at which the variable is located. */
20754 /* Nothing should follow this operator, so the top of stack would
20756 /* This is valid for partial global symbols, but the variable's
20757 address will be bogus in the psymtab. Make it always at least
20758 non-zero to not look as a variable garbage collected by linker
20759 which have DW_OP_addr 0. */
20761 dwarf2_complex_location_expr_complaint ();
20765 case DW_OP_GNU_uninit
:
20768 case DW_OP_GNU_addr_index
:
20769 case DW_OP_GNU_const_index
:
20770 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
20777 const char *name
= get_DW_OP_name (op
);
20780 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
20783 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
20787 return (stack
[stacki
]);
20790 /* Enforce maximum stack depth of SIZE-1 to avoid writing
20791 outside of the allocated space. Also enforce minimum>0. */
20792 if (stacki
>= ARRAY_SIZE (stack
) - 1)
20794 complaint (&symfile_complaints
,
20795 _("location description stack overflow"));
20801 complaint (&symfile_complaints
,
20802 _("location description stack underflow"));
20806 return (stack
[stacki
]);
20809 /* memory allocation interface */
20811 static struct dwarf_block
*
20812 dwarf_alloc_block (struct dwarf2_cu
*cu
)
20814 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
20817 static struct die_info
*
20818 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
20820 struct die_info
*die
;
20821 size_t size
= sizeof (struct die_info
);
20824 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
20826 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
20827 memset (die
, 0, sizeof (struct die_info
));
20832 /* Macro support. */
20834 /* Return file name relative to the compilation directory of file number I in
20835 *LH's file name table. The result is allocated using xmalloc; the caller is
20836 responsible for freeing it. */
20839 file_file_name (int file
, struct line_header
*lh
)
20841 /* Is the file number a valid index into the line header's file name
20842 table? Remember that file numbers start with one, not zero. */
20843 if (1 <= file
&& file
<= lh
->num_file_names
)
20845 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
20847 if (IS_ABSOLUTE_PATH (fe
->name
) || fe
->dir_index
== 0
20848 || lh
->include_dirs
== NULL
)
20849 return xstrdup (fe
->name
);
20850 return concat (lh
->include_dirs
[fe
->dir_index
- 1], SLASH_STRING
,
20851 fe
->name
, (char *) NULL
);
20855 /* The compiler produced a bogus file number. We can at least
20856 record the macro definitions made in the file, even if we
20857 won't be able to find the file by name. */
20858 char fake_name
[80];
20860 xsnprintf (fake_name
, sizeof (fake_name
),
20861 "<bad macro file number %d>", file
);
20863 complaint (&symfile_complaints
,
20864 _("bad file number in macro information (%d)"),
20867 return xstrdup (fake_name
);
20871 /* Return the full name of file number I in *LH's file name table.
20872 Use COMP_DIR as the name of the current directory of the
20873 compilation. The result is allocated using xmalloc; the caller is
20874 responsible for freeing it. */
20876 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
20878 /* Is the file number a valid index into the line header's file name
20879 table? Remember that file numbers start with one, not zero. */
20880 if (1 <= file
&& file
<= lh
->num_file_names
)
20882 char *relative
= file_file_name (file
, lh
);
20884 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
20886 return reconcat (relative
, comp_dir
, SLASH_STRING
,
20887 relative
, (char *) NULL
);
20890 return file_file_name (file
, lh
);
20894 static struct macro_source_file
*
20895 macro_start_file (int file
, int line
,
20896 struct macro_source_file
*current_file
,
20897 struct line_header
*lh
)
20899 /* File name relative to the compilation directory of this source file. */
20900 char *file_name
= file_file_name (file
, lh
);
20902 if (! current_file
)
20904 /* Note: We don't create a macro table for this compilation unit
20905 at all until we actually get a filename. */
20906 struct macro_table
*macro_table
= get_macro_table ();
20908 /* If we have no current file, then this must be the start_file
20909 directive for the compilation unit's main source file. */
20910 current_file
= macro_set_main (macro_table
, file_name
);
20911 macro_define_special (macro_table
);
20914 current_file
= macro_include (current_file
, line
, file_name
);
20918 return current_file
;
20922 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
20923 followed by a null byte. */
20925 copy_string (const char *buf
, int len
)
20927 char *s
= (char *) xmalloc (len
+ 1);
20929 memcpy (s
, buf
, len
);
20935 static const char *
20936 consume_improper_spaces (const char *p
, const char *body
)
20940 complaint (&symfile_complaints
,
20941 _("macro definition contains spaces "
20942 "in formal argument list:\n`%s'"),
20954 parse_macro_definition (struct macro_source_file
*file
, int line
,
20959 /* The body string takes one of two forms. For object-like macro
20960 definitions, it should be:
20962 <macro name> " " <definition>
20964 For function-like macro definitions, it should be:
20966 <macro name> "() " <definition>
20968 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
20970 Spaces may appear only where explicitly indicated, and in the
20973 The Dwarf 2 spec says that an object-like macro's name is always
20974 followed by a space, but versions of GCC around March 2002 omit
20975 the space when the macro's definition is the empty string.
20977 The Dwarf 2 spec says that there should be no spaces between the
20978 formal arguments in a function-like macro's formal argument list,
20979 but versions of GCC around March 2002 include spaces after the
20983 /* Find the extent of the macro name. The macro name is terminated
20984 by either a space or null character (for an object-like macro) or
20985 an opening paren (for a function-like macro). */
20986 for (p
= body
; *p
; p
++)
20987 if (*p
== ' ' || *p
== '(')
20990 if (*p
== ' ' || *p
== '\0')
20992 /* It's an object-like macro. */
20993 int name_len
= p
- body
;
20994 char *name
= copy_string (body
, name_len
);
20995 const char *replacement
;
20998 replacement
= body
+ name_len
+ 1;
21001 dwarf2_macro_malformed_definition_complaint (body
);
21002 replacement
= body
+ name_len
;
21005 macro_define_object (file
, line
, name
, replacement
);
21009 else if (*p
== '(')
21011 /* It's a function-like macro. */
21012 char *name
= copy_string (body
, p
- body
);
21015 char **argv
= XNEWVEC (char *, argv_size
);
21019 p
= consume_improper_spaces (p
, body
);
21021 /* Parse the formal argument list. */
21022 while (*p
&& *p
!= ')')
21024 /* Find the extent of the current argument name. */
21025 const char *arg_start
= p
;
21027 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
21030 if (! *p
|| p
== arg_start
)
21031 dwarf2_macro_malformed_definition_complaint (body
);
21034 /* Make sure argv has room for the new argument. */
21035 if (argc
>= argv_size
)
21038 argv
= XRESIZEVEC (char *, argv
, argv_size
);
21041 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
21044 p
= consume_improper_spaces (p
, body
);
21046 /* Consume the comma, if present. */
21051 p
= consume_improper_spaces (p
, body
);
21060 /* Perfectly formed definition, no complaints. */
21061 macro_define_function (file
, line
, name
,
21062 argc
, (const char **) argv
,
21064 else if (*p
== '\0')
21066 /* Complain, but do define it. */
21067 dwarf2_macro_malformed_definition_complaint (body
);
21068 macro_define_function (file
, line
, name
,
21069 argc
, (const char **) argv
,
21073 /* Just complain. */
21074 dwarf2_macro_malformed_definition_complaint (body
);
21077 /* Just complain. */
21078 dwarf2_macro_malformed_definition_complaint (body
);
21084 for (i
= 0; i
< argc
; i
++)
21090 dwarf2_macro_malformed_definition_complaint (body
);
21093 /* Skip some bytes from BYTES according to the form given in FORM.
21094 Returns the new pointer. */
21096 static const gdb_byte
*
21097 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
21098 enum dwarf_form form
,
21099 unsigned int offset_size
,
21100 struct dwarf2_section_info
*section
)
21102 unsigned int bytes_read
;
21106 case DW_FORM_data1
:
21111 case DW_FORM_data2
:
21115 case DW_FORM_data4
:
21119 case DW_FORM_data8
:
21123 case DW_FORM_string
:
21124 read_direct_string (abfd
, bytes
, &bytes_read
);
21125 bytes
+= bytes_read
;
21128 case DW_FORM_sec_offset
:
21130 case DW_FORM_GNU_strp_alt
:
21131 bytes
+= offset_size
;
21134 case DW_FORM_block
:
21135 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
21136 bytes
+= bytes_read
;
21139 case DW_FORM_block1
:
21140 bytes
+= 1 + read_1_byte (abfd
, bytes
);
21142 case DW_FORM_block2
:
21143 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
21145 case DW_FORM_block4
:
21146 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
21149 case DW_FORM_sdata
:
21150 case DW_FORM_udata
:
21151 case DW_FORM_GNU_addr_index
:
21152 case DW_FORM_GNU_str_index
:
21153 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
21156 dwarf2_section_buffer_overflow_complaint (section
);
21164 complaint (&symfile_complaints
,
21165 _("invalid form 0x%x in `%s'"),
21166 form
, get_section_name (section
));
21174 /* A helper for dwarf_decode_macros that handles skipping an unknown
21175 opcode. Returns an updated pointer to the macro data buffer; or,
21176 on error, issues a complaint and returns NULL. */
21178 static const gdb_byte
*
21179 skip_unknown_opcode (unsigned int opcode
,
21180 const gdb_byte
**opcode_definitions
,
21181 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
21183 unsigned int offset_size
,
21184 struct dwarf2_section_info
*section
)
21186 unsigned int bytes_read
, i
;
21188 const gdb_byte
*defn
;
21190 if (opcode_definitions
[opcode
] == NULL
)
21192 complaint (&symfile_complaints
,
21193 _("unrecognized DW_MACFINO opcode 0x%x"),
21198 defn
= opcode_definitions
[opcode
];
21199 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
21200 defn
+= bytes_read
;
21202 for (i
= 0; i
< arg
; ++i
)
21204 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
,
21205 (enum dwarf_form
) defn
[i
], offset_size
,
21207 if (mac_ptr
== NULL
)
21209 /* skip_form_bytes already issued the complaint. */
21217 /* A helper function which parses the header of a macro section.
21218 If the macro section is the extended (for now called "GNU") type,
21219 then this updates *OFFSET_SIZE. Returns a pointer to just after
21220 the header, or issues a complaint and returns NULL on error. */
21222 static const gdb_byte
*
21223 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
21225 const gdb_byte
*mac_ptr
,
21226 unsigned int *offset_size
,
21227 int section_is_gnu
)
21229 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
21231 if (section_is_gnu
)
21233 unsigned int version
, flags
;
21235 version
= read_2_bytes (abfd
, mac_ptr
);
21238 complaint (&symfile_complaints
,
21239 _("unrecognized version `%d' in .debug_macro section"),
21245 flags
= read_1_byte (abfd
, mac_ptr
);
21247 *offset_size
= (flags
& 1) ? 8 : 4;
21249 if ((flags
& 2) != 0)
21250 /* We don't need the line table offset. */
21251 mac_ptr
+= *offset_size
;
21253 /* Vendor opcode descriptions. */
21254 if ((flags
& 4) != 0)
21256 unsigned int i
, count
;
21258 count
= read_1_byte (abfd
, mac_ptr
);
21260 for (i
= 0; i
< count
; ++i
)
21262 unsigned int opcode
, bytes_read
;
21265 opcode
= read_1_byte (abfd
, mac_ptr
);
21267 opcode_definitions
[opcode
] = mac_ptr
;
21268 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21269 mac_ptr
+= bytes_read
;
21278 /* A helper for dwarf_decode_macros that handles the GNU extensions,
21279 including DW_MACRO_GNU_transparent_include. */
21282 dwarf_decode_macro_bytes (bfd
*abfd
,
21283 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
21284 struct macro_source_file
*current_file
,
21285 struct line_header
*lh
,
21286 struct dwarf2_section_info
*section
,
21287 int section_is_gnu
, int section_is_dwz
,
21288 unsigned int offset_size
,
21289 htab_t include_hash
)
21291 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21292 enum dwarf_macro_record_type macinfo_type
;
21293 int at_commandline
;
21294 const gdb_byte
*opcode_definitions
[256];
21296 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
21297 &offset_size
, section_is_gnu
);
21298 if (mac_ptr
== NULL
)
21300 /* We already issued a complaint. */
21304 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
21305 GDB is still reading the definitions from command line. First
21306 DW_MACINFO_start_file will need to be ignored as it was already executed
21307 to create CURRENT_FILE for the main source holding also the command line
21308 definitions. On first met DW_MACINFO_start_file this flag is reset to
21309 normally execute all the remaining DW_MACINFO_start_file macinfos. */
21311 at_commandline
= 1;
21315 /* Do we at least have room for a macinfo type byte? */
21316 if (mac_ptr
>= mac_end
)
21318 dwarf2_section_buffer_overflow_complaint (section
);
21322 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
21325 /* Note that we rely on the fact that the corresponding GNU and
21326 DWARF constants are the same. */
21327 switch (macinfo_type
)
21329 /* A zero macinfo type indicates the end of the macro
21334 case DW_MACRO_GNU_define
:
21335 case DW_MACRO_GNU_undef
:
21336 case DW_MACRO_GNU_define_indirect
:
21337 case DW_MACRO_GNU_undef_indirect
:
21338 case DW_MACRO_GNU_define_indirect_alt
:
21339 case DW_MACRO_GNU_undef_indirect_alt
:
21341 unsigned int bytes_read
;
21346 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21347 mac_ptr
+= bytes_read
;
21349 if (macinfo_type
== DW_MACRO_GNU_define
21350 || macinfo_type
== DW_MACRO_GNU_undef
)
21352 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21353 mac_ptr
+= bytes_read
;
21357 LONGEST str_offset
;
21359 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
21360 mac_ptr
+= offset_size
;
21362 if (macinfo_type
== DW_MACRO_GNU_define_indirect_alt
21363 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
21366 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
21368 body
= read_indirect_string_from_dwz (dwz
, str_offset
);
21371 body
= read_indirect_string_at_offset (abfd
, str_offset
);
21374 is_define
= (macinfo_type
== DW_MACRO_GNU_define
21375 || macinfo_type
== DW_MACRO_GNU_define_indirect
21376 || macinfo_type
== DW_MACRO_GNU_define_indirect_alt
);
21377 if (! current_file
)
21379 /* DWARF violation as no main source is present. */
21380 complaint (&symfile_complaints
,
21381 _("debug info with no main source gives macro %s "
21383 is_define
? _("definition") : _("undefinition"),
21387 if ((line
== 0 && !at_commandline
)
21388 || (line
!= 0 && at_commandline
))
21389 complaint (&symfile_complaints
,
21390 _("debug info gives %s macro %s with %s line %d: %s"),
21391 at_commandline
? _("command-line") : _("in-file"),
21392 is_define
? _("definition") : _("undefinition"),
21393 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
21396 parse_macro_definition (current_file
, line
, body
);
21399 gdb_assert (macinfo_type
== DW_MACRO_GNU_undef
21400 || macinfo_type
== DW_MACRO_GNU_undef_indirect
21401 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
);
21402 macro_undef (current_file
, line
, body
);
21407 case DW_MACRO_GNU_start_file
:
21409 unsigned int bytes_read
;
21412 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21413 mac_ptr
+= bytes_read
;
21414 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21415 mac_ptr
+= bytes_read
;
21417 if ((line
== 0 && !at_commandline
)
21418 || (line
!= 0 && at_commandline
))
21419 complaint (&symfile_complaints
,
21420 _("debug info gives source %d included "
21421 "from %s at %s line %d"),
21422 file
, at_commandline
? _("command-line") : _("file"),
21423 line
== 0 ? _("zero") : _("non-zero"), line
);
21425 if (at_commandline
)
21427 /* This DW_MACRO_GNU_start_file was executed in the
21429 at_commandline
= 0;
21432 current_file
= macro_start_file (file
, line
, current_file
, lh
);
21436 case DW_MACRO_GNU_end_file
:
21437 if (! current_file
)
21438 complaint (&symfile_complaints
,
21439 _("macro debug info has an unmatched "
21440 "`close_file' directive"));
21443 current_file
= current_file
->included_by
;
21444 if (! current_file
)
21446 enum dwarf_macro_record_type next_type
;
21448 /* GCC circa March 2002 doesn't produce the zero
21449 type byte marking the end of the compilation
21450 unit. Complain if it's not there, but exit no
21453 /* Do we at least have room for a macinfo type byte? */
21454 if (mac_ptr
>= mac_end
)
21456 dwarf2_section_buffer_overflow_complaint (section
);
21460 /* We don't increment mac_ptr here, so this is just
21463 = (enum dwarf_macro_record_type
) read_1_byte (abfd
,
21465 if (next_type
!= 0)
21466 complaint (&symfile_complaints
,
21467 _("no terminating 0-type entry for "
21468 "macros in `.debug_macinfo' section"));
21475 case DW_MACRO_GNU_transparent_include
:
21476 case DW_MACRO_GNU_transparent_include_alt
:
21480 bfd
*include_bfd
= abfd
;
21481 struct dwarf2_section_info
*include_section
= section
;
21482 const gdb_byte
*include_mac_end
= mac_end
;
21483 int is_dwz
= section_is_dwz
;
21484 const gdb_byte
*new_mac_ptr
;
21486 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
21487 mac_ptr
+= offset_size
;
21489 if (macinfo_type
== DW_MACRO_GNU_transparent_include_alt
)
21491 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
21493 dwarf2_read_section (objfile
, &dwz
->macro
);
21495 include_section
= &dwz
->macro
;
21496 include_bfd
= get_section_bfd_owner (include_section
);
21497 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
21501 new_mac_ptr
= include_section
->buffer
+ offset
;
21502 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
21506 /* This has actually happened; see
21507 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
21508 complaint (&symfile_complaints
,
21509 _("recursive DW_MACRO_GNU_transparent_include in "
21510 ".debug_macro section"));
21514 *slot
= (void *) new_mac_ptr
;
21516 dwarf_decode_macro_bytes (include_bfd
, new_mac_ptr
,
21517 include_mac_end
, current_file
, lh
,
21518 section
, section_is_gnu
, is_dwz
,
21519 offset_size
, include_hash
);
21521 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
21526 case DW_MACINFO_vendor_ext
:
21527 if (!section_is_gnu
)
21529 unsigned int bytes_read
;
21531 /* This reads the constant, but since we don't recognize
21532 any vendor extensions, we ignore it. */
21533 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21534 mac_ptr
+= bytes_read
;
21535 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21536 mac_ptr
+= bytes_read
;
21538 /* We don't recognize any vendor extensions. */
21544 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
21545 mac_ptr
, mac_end
, abfd
, offset_size
,
21547 if (mac_ptr
== NULL
)
21551 } while (macinfo_type
!= 0);
21555 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
21556 int section_is_gnu
)
21558 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21559 struct line_header
*lh
= cu
->line_header
;
21561 const gdb_byte
*mac_ptr
, *mac_end
;
21562 struct macro_source_file
*current_file
= 0;
21563 enum dwarf_macro_record_type macinfo_type
;
21564 unsigned int offset_size
= cu
->header
.offset_size
;
21565 const gdb_byte
*opcode_definitions
[256];
21566 struct cleanup
*cleanup
;
21568 struct dwarf2_section_info
*section
;
21569 const char *section_name
;
21571 if (cu
->dwo_unit
!= NULL
)
21573 if (section_is_gnu
)
21575 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
21576 section_name
= ".debug_macro.dwo";
21580 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
21581 section_name
= ".debug_macinfo.dwo";
21586 if (section_is_gnu
)
21588 section
= &dwarf2_per_objfile
->macro
;
21589 section_name
= ".debug_macro";
21593 section
= &dwarf2_per_objfile
->macinfo
;
21594 section_name
= ".debug_macinfo";
21598 dwarf2_read_section (objfile
, section
);
21599 if (section
->buffer
== NULL
)
21601 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
21604 abfd
= get_section_bfd_owner (section
);
21606 /* First pass: Find the name of the base filename.
21607 This filename is needed in order to process all macros whose definition
21608 (or undefinition) comes from the command line. These macros are defined
21609 before the first DW_MACINFO_start_file entry, and yet still need to be
21610 associated to the base file.
21612 To determine the base file name, we scan the macro definitions until we
21613 reach the first DW_MACINFO_start_file entry. We then initialize
21614 CURRENT_FILE accordingly so that any macro definition found before the
21615 first DW_MACINFO_start_file can still be associated to the base file. */
21617 mac_ptr
= section
->buffer
+ offset
;
21618 mac_end
= section
->buffer
+ section
->size
;
21620 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
21621 &offset_size
, section_is_gnu
);
21622 if (mac_ptr
== NULL
)
21624 /* We already issued a complaint. */
21630 /* Do we at least have room for a macinfo type byte? */
21631 if (mac_ptr
>= mac_end
)
21633 /* Complaint is printed during the second pass as GDB will probably
21634 stop the first pass earlier upon finding
21635 DW_MACINFO_start_file. */
21639 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
21642 /* Note that we rely on the fact that the corresponding GNU and
21643 DWARF constants are the same. */
21644 switch (macinfo_type
)
21646 /* A zero macinfo type indicates the end of the macro
21651 case DW_MACRO_GNU_define
:
21652 case DW_MACRO_GNU_undef
:
21653 /* Only skip the data by MAC_PTR. */
21655 unsigned int bytes_read
;
21657 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21658 mac_ptr
+= bytes_read
;
21659 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21660 mac_ptr
+= bytes_read
;
21664 case DW_MACRO_GNU_start_file
:
21666 unsigned int bytes_read
;
21669 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21670 mac_ptr
+= bytes_read
;
21671 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21672 mac_ptr
+= bytes_read
;
21674 current_file
= macro_start_file (file
, line
, current_file
, lh
);
21678 case DW_MACRO_GNU_end_file
:
21679 /* No data to skip by MAC_PTR. */
21682 case DW_MACRO_GNU_define_indirect
:
21683 case DW_MACRO_GNU_undef_indirect
:
21684 case DW_MACRO_GNU_define_indirect_alt
:
21685 case DW_MACRO_GNU_undef_indirect_alt
:
21687 unsigned int bytes_read
;
21689 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21690 mac_ptr
+= bytes_read
;
21691 mac_ptr
+= offset_size
;
21695 case DW_MACRO_GNU_transparent_include
:
21696 case DW_MACRO_GNU_transparent_include_alt
:
21697 /* Note that, according to the spec, a transparent include
21698 chain cannot call DW_MACRO_GNU_start_file. So, we can just
21699 skip this opcode. */
21700 mac_ptr
+= offset_size
;
21703 case DW_MACINFO_vendor_ext
:
21704 /* Only skip the data by MAC_PTR. */
21705 if (!section_is_gnu
)
21707 unsigned int bytes_read
;
21709 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21710 mac_ptr
+= bytes_read
;
21711 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21712 mac_ptr
+= bytes_read
;
21717 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
21718 mac_ptr
, mac_end
, abfd
, offset_size
,
21720 if (mac_ptr
== NULL
)
21724 } while (macinfo_type
!= 0 && current_file
== NULL
);
21726 /* Second pass: Process all entries.
21728 Use the AT_COMMAND_LINE flag to determine whether we are still processing
21729 command-line macro definitions/undefinitions. This flag is unset when we
21730 reach the first DW_MACINFO_start_file entry. */
21732 htab_up
include_hash (htab_create_alloc (1, htab_hash_pointer
,
21734 NULL
, xcalloc
, xfree
));
21735 mac_ptr
= section
->buffer
+ offset
;
21736 slot
= htab_find_slot (include_hash
.get (), mac_ptr
, INSERT
);
21737 *slot
= (void *) mac_ptr
;
21738 dwarf_decode_macro_bytes (abfd
, mac_ptr
, mac_end
,
21739 current_file
, lh
, section
,
21740 section_is_gnu
, 0, offset_size
,
21741 include_hash
.get ());
21744 /* Check if the attribute's form is a DW_FORM_block*
21745 if so return true else false. */
21748 attr_form_is_block (const struct attribute
*attr
)
21750 return (attr
== NULL
? 0 :
21751 attr
->form
== DW_FORM_block1
21752 || attr
->form
== DW_FORM_block2
21753 || attr
->form
== DW_FORM_block4
21754 || attr
->form
== DW_FORM_block
21755 || attr
->form
== DW_FORM_exprloc
);
21758 /* Return non-zero if ATTR's value is a section offset --- classes
21759 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
21760 You may use DW_UNSND (attr) to retrieve such offsets.
21762 Section 7.5.4, "Attribute Encodings", explains that no attribute
21763 may have a value that belongs to more than one of these classes; it
21764 would be ambiguous if we did, because we use the same forms for all
21768 attr_form_is_section_offset (const struct attribute
*attr
)
21770 return (attr
->form
== DW_FORM_data4
21771 || attr
->form
== DW_FORM_data8
21772 || attr
->form
== DW_FORM_sec_offset
);
21775 /* Return non-zero if ATTR's value falls in the 'constant' class, or
21776 zero otherwise. When this function returns true, you can apply
21777 dwarf2_get_attr_constant_value to it.
21779 However, note that for some attributes you must check
21780 attr_form_is_section_offset before using this test. DW_FORM_data4
21781 and DW_FORM_data8 are members of both the constant class, and of
21782 the classes that contain offsets into other debug sections
21783 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
21784 that, if an attribute's can be either a constant or one of the
21785 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
21786 taken as section offsets, not constants. */
21789 attr_form_is_constant (const struct attribute
*attr
)
21791 switch (attr
->form
)
21793 case DW_FORM_sdata
:
21794 case DW_FORM_udata
:
21795 case DW_FORM_data1
:
21796 case DW_FORM_data2
:
21797 case DW_FORM_data4
:
21798 case DW_FORM_data8
:
21806 /* DW_ADDR is always stored already as sect_offset; despite for the forms
21807 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
21810 attr_form_is_ref (const struct attribute
*attr
)
21812 switch (attr
->form
)
21814 case DW_FORM_ref_addr
:
21819 case DW_FORM_ref_udata
:
21820 case DW_FORM_GNU_ref_alt
:
21827 /* Return the .debug_loc section to use for CU.
21828 For DWO files use .debug_loc.dwo. */
21830 static struct dwarf2_section_info
*
21831 cu_debug_loc_section (struct dwarf2_cu
*cu
)
21834 return &cu
->dwo_unit
->dwo_file
->sections
.loc
;
21835 return &dwarf2_per_objfile
->loc
;
21838 /* A helper function that fills in a dwarf2_loclist_baton. */
21841 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
21842 struct dwarf2_loclist_baton
*baton
,
21843 const struct attribute
*attr
)
21845 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
21847 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
21849 baton
->per_cu
= cu
->per_cu
;
21850 gdb_assert (baton
->per_cu
);
21851 /* We don't know how long the location list is, but make sure we
21852 don't run off the edge of the section. */
21853 baton
->size
= section
->size
- DW_UNSND (attr
);
21854 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
21855 baton
->base_address
= cu
->base_address
;
21856 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
21860 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
21861 struct dwarf2_cu
*cu
, int is_block
)
21863 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21864 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
21866 if (attr_form_is_section_offset (attr
)
21867 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
21868 the section. If so, fall through to the complaint in the
21870 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
21872 struct dwarf2_loclist_baton
*baton
;
21874 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
21876 fill_in_loclist_baton (cu
, baton
, attr
);
21878 if (cu
->base_known
== 0)
21879 complaint (&symfile_complaints
,
21880 _("Location list used without "
21881 "specifying the CU base address."));
21883 SYMBOL_ACLASS_INDEX (sym
) = (is_block
21884 ? dwarf2_loclist_block_index
21885 : dwarf2_loclist_index
);
21886 SYMBOL_LOCATION_BATON (sym
) = baton
;
21890 struct dwarf2_locexpr_baton
*baton
;
21892 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
21893 baton
->per_cu
= cu
->per_cu
;
21894 gdb_assert (baton
->per_cu
);
21896 if (attr_form_is_block (attr
))
21898 /* Note that we're just copying the block's data pointer
21899 here, not the actual data. We're still pointing into the
21900 info_buffer for SYM's objfile; right now we never release
21901 that buffer, but when we do clean up properly this may
21903 baton
->size
= DW_BLOCK (attr
)->size
;
21904 baton
->data
= DW_BLOCK (attr
)->data
;
21908 dwarf2_invalid_attrib_class_complaint ("location description",
21909 SYMBOL_NATURAL_NAME (sym
));
21913 SYMBOL_ACLASS_INDEX (sym
) = (is_block
21914 ? dwarf2_locexpr_block_index
21915 : dwarf2_locexpr_index
);
21916 SYMBOL_LOCATION_BATON (sym
) = baton
;
21920 /* Return the OBJFILE associated with the compilation unit CU. If CU
21921 came from a separate debuginfo file, then the master objfile is
21925 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
21927 struct objfile
*objfile
= per_cu
->objfile
;
21929 /* Return the master objfile, so that we can report and look up the
21930 correct file containing this variable. */
21931 if (objfile
->separate_debug_objfile_backlink
)
21932 objfile
= objfile
->separate_debug_objfile_backlink
;
21937 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
21938 (CU_HEADERP is unused in such case) or prepare a temporary copy at
21939 CU_HEADERP first. */
21941 static const struct comp_unit_head
*
21942 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
21943 struct dwarf2_per_cu_data
*per_cu
)
21945 const gdb_byte
*info_ptr
;
21948 return &per_cu
->cu
->header
;
21950 info_ptr
= per_cu
->section
->buffer
+ per_cu
->offset
.sect_off
;
21952 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
21953 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->objfile
->obfd
);
21958 /* Return the address size given in the compilation unit header for CU. */
21961 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
21963 struct comp_unit_head cu_header_local
;
21964 const struct comp_unit_head
*cu_headerp
;
21966 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21968 return cu_headerp
->addr_size
;
21971 /* Return the offset size given in the compilation unit header for CU. */
21974 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
21976 struct comp_unit_head cu_header_local
;
21977 const struct comp_unit_head
*cu_headerp
;
21979 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21981 return cu_headerp
->offset_size
;
21984 /* See its dwarf2loc.h declaration. */
21987 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
21989 struct comp_unit_head cu_header_local
;
21990 const struct comp_unit_head
*cu_headerp
;
21992 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21994 if (cu_headerp
->version
== 2)
21995 return cu_headerp
->addr_size
;
21997 return cu_headerp
->offset_size
;
22000 /* Return the text offset of the CU. The returned offset comes from
22001 this CU's objfile. If this objfile came from a separate debuginfo
22002 file, then the offset may be different from the corresponding
22003 offset in the parent objfile. */
22006 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
22008 struct objfile
*objfile
= per_cu
->objfile
;
22010 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
22013 /* Locate the .debug_info compilation unit from CU's objfile which contains
22014 the DIE at OFFSET. Raises an error on failure. */
22016 static struct dwarf2_per_cu_data
*
22017 dwarf2_find_containing_comp_unit (sect_offset offset
,
22018 unsigned int offset_in_dwz
,
22019 struct objfile
*objfile
)
22021 struct dwarf2_per_cu_data
*this_cu
;
22023 const sect_offset
*cu_off
;
22026 high
= dwarf2_per_objfile
->n_comp_units
- 1;
22029 struct dwarf2_per_cu_data
*mid_cu
;
22030 int mid
= low
+ (high
- low
) / 2;
22032 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
22033 cu_off
= &mid_cu
->offset
;
22034 if (mid_cu
->is_dwz
> offset_in_dwz
22035 || (mid_cu
->is_dwz
== offset_in_dwz
22036 && cu_off
->sect_off
>= offset
.sect_off
))
22041 gdb_assert (low
== high
);
22042 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
22043 cu_off
= &this_cu
->offset
;
22044 if (this_cu
->is_dwz
!= offset_in_dwz
|| cu_off
->sect_off
> offset
.sect_off
)
22046 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
22047 error (_("Dwarf Error: could not find partial DIE containing "
22048 "offset 0x%lx [in module %s]"),
22049 (long) offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
22051 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
.sect_off
22052 <= offset
.sect_off
);
22053 return dwarf2_per_objfile
->all_comp_units
[low
-1];
22057 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
22058 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
22059 && offset
.sect_off
>= this_cu
->offset
.sect_off
+ this_cu
->length
)
22060 error (_("invalid dwarf2 offset %u"), offset
.sect_off
);
22061 gdb_assert (offset
.sect_off
< this_cu
->offset
.sect_off
+ this_cu
->length
);
22066 /* Initialize dwarf2_cu CU, owned by PER_CU. */
22069 init_one_comp_unit (struct dwarf2_cu
*cu
, struct dwarf2_per_cu_data
*per_cu
)
22071 memset (cu
, 0, sizeof (*cu
));
22073 cu
->per_cu
= per_cu
;
22074 cu
->objfile
= per_cu
->objfile
;
22075 obstack_init (&cu
->comp_unit_obstack
);
22078 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
22081 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
22082 enum language pretend_language
)
22084 struct attribute
*attr
;
22086 /* Set the language we're debugging. */
22087 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
22089 set_cu_language (DW_UNSND (attr
), cu
);
22092 cu
->language
= pretend_language
;
22093 cu
->language_defn
= language_def (cu
->language
);
22096 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
22099 /* Release one cached compilation unit, CU. We unlink it from the tree
22100 of compilation units, but we don't remove it from the read_in_chain;
22101 the caller is responsible for that.
22102 NOTE: DATA is a void * because this function is also used as a
22103 cleanup routine. */
22106 free_heap_comp_unit (void *data
)
22108 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) data
;
22110 gdb_assert (cu
->per_cu
!= NULL
);
22111 cu
->per_cu
->cu
= NULL
;
22114 obstack_free (&cu
->comp_unit_obstack
, NULL
);
22119 /* This cleanup function is passed the address of a dwarf2_cu on the stack
22120 when we're finished with it. We can't free the pointer itself, but be
22121 sure to unlink it from the cache. Also release any associated storage. */
22124 free_stack_comp_unit (void *data
)
22126 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) data
;
22128 gdb_assert (cu
->per_cu
!= NULL
);
22129 cu
->per_cu
->cu
= NULL
;
22132 obstack_free (&cu
->comp_unit_obstack
, NULL
);
22133 cu
->partial_dies
= NULL
;
22136 /* Free all cached compilation units. */
22139 free_cached_comp_units (void *data
)
22141 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22143 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22144 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22145 while (per_cu
!= NULL
)
22147 struct dwarf2_per_cu_data
*next_cu
;
22149 next_cu
= per_cu
->cu
->read_in_chain
;
22151 free_heap_comp_unit (per_cu
->cu
);
22152 *last_chain
= next_cu
;
22158 /* Increase the age counter on each cached compilation unit, and free
22159 any that are too old. */
22162 age_cached_comp_units (void)
22164 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22166 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
22167 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22168 while (per_cu
!= NULL
)
22170 per_cu
->cu
->last_used
++;
22171 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
22172 dwarf2_mark (per_cu
->cu
);
22173 per_cu
= per_cu
->cu
->read_in_chain
;
22176 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22177 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22178 while (per_cu
!= NULL
)
22180 struct dwarf2_per_cu_data
*next_cu
;
22182 next_cu
= per_cu
->cu
->read_in_chain
;
22184 if (!per_cu
->cu
->mark
)
22186 free_heap_comp_unit (per_cu
->cu
);
22187 *last_chain
= next_cu
;
22190 last_chain
= &per_cu
->cu
->read_in_chain
;
22196 /* Remove a single compilation unit from the cache. */
22199 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
22201 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22203 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22204 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22205 while (per_cu
!= NULL
)
22207 struct dwarf2_per_cu_data
*next_cu
;
22209 next_cu
= per_cu
->cu
->read_in_chain
;
22211 if (per_cu
== target_per_cu
)
22213 free_heap_comp_unit (per_cu
->cu
);
22215 *last_chain
= next_cu
;
22219 last_chain
= &per_cu
->cu
->read_in_chain
;
22225 /* Release all extra memory associated with OBJFILE. */
22228 dwarf2_free_objfile (struct objfile
*objfile
)
22231 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
22232 dwarf2_objfile_data_key
);
22234 if (dwarf2_per_objfile
== NULL
)
22237 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
22238 free_cached_comp_units (NULL
);
22240 if (dwarf2_per_objfile
->quick_file_names_table
)
22241 htab_delete (dwarf2_per_objfile
->quick_file_names_table
);
22243 if (dwarf2_per_objfile
->line_header_hash
)
22244 htab_delete (dwarf2_per_objfile
->line_header_hash
);
22246 /* Everything else should be on the objfile obstack. */
22249 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
22250 We store these in a hash table separate from the DIEs, and preserve them
22251 when the DIEs are flushed out of cache.
22253 The CU "per_cu" pointer is needed because offset alone is not enough to
22254 uniquely identify the type. A file may have multiple .debug_types sections,
22255 or the type may come from a DWO file. Furthermore, while it's more logical
22256 to use per_cu->section+offset, with Fission the section with the data is in
22257 the DWO file but we don't know that section at the point we need it.
22258 We have to use something in dwarf2_per_cu_data (or the pointer to it)
22259 because we can enter the lookup routine, get_die_type_at_offset, from
22260 outside this file, and thus won't necessarily have PER_CU->cu.
22261 Fortunately, PER_CU is stable for the life of the objfile. */
22263 struct dwarf2_per_cu_offset_and_type
22265 const struct dwarf2_per_cu_data
*per_cu
;
22266 sect_offset offset
;
22270 /* Hash function for a dwarf2_per_cu_offset_and_type. */
22273 per_cu_offset_and_type_hash (const void *item
)
22275 const struct dwarf2_per_cu_offset_and_type
*ofs
22276 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
22278 return (uintptr_t) ofs
->per_cu
+ ofs
->offset
.sect_off
;
22281 /* Equality function for a dwarf2_per_cu_offset_and_type. */
22284 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
22286 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
22287 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
22288 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
22289 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
22291 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
22292 && ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
);
22295 /* Set the type associated with DIE to TYPE. Save it in CU's hash
22296 table if necessary. For convenience, return TYPE.
22298 The DIEs reading must have careful ordering to:
22299 * Not cause infite loops trying to read in DIEs as a prerequisite for
22300 reading current DIE.
22301 * Not trying to dereference contents of still incompletely read in types
22302 while reading in other DIEs.
22303 * Enable referencing still incompletely read in types just by a pointer to
22304 the type without accessing its fields.
22306 Therefore caller should follow these rules:
22307 * Try to fetch any prerequisite types we may need to build this DIE type
22308 before building the type and calling set_die_type.
22309 * After building type call set_die_type for current DIE as soon as
22310 possible before fetching more types to complete the current type.
22311 * Make the type as complete as possible before fetching more types. */
22313 static struct type
*
22314 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
22316 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
22317 struct objfile
*objfile
= cu
->objfile
;
22318 struct attribute
*attr
;
22319 struct dynamic_prop prop
;
22321 /* For Ada types, make sure that the gnat-specific data is always
22322 initialized (if not already set). There are a few types where
22323 we should not be doing so, because the type-specific area is
22324 already used to hold some other piece of info (eg: TYPE_CODE_FLT
22325 where the type-specific area is used to store the floatformat).
22326 But this is not a problem, because the gnat-specific information
22327 is actually not needed for these types. */
22328 if (need_gnat_info (cu
)
22329 && TYPE_CODE (type
) != TYPE_CODE_FUNC
22330 && TYPE_CODE (type
) != TYPE_CODE_FLT
22331 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
22332 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
22333 && TYPE_CODE (type
) != TYPE_CODE_METHOD
22334 && !HAVE_GNAT_AUX_INFO (type
))
22335 INIT_GNAT_SPECIFIC (type
);
22337 /* Read DW_AT_allocated and set in type. */
22338 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
22339 if (attr_form_is_block (attr
))
22341 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
22342 add_dyn_prop (DYN_PROP_ALLOCATED
, prop
, type
, objfile
);
22344 else if (attr
!= NULL
)
22346 complaint (&symfile_complaints
,
22347 _("DW_AT_allocated has the wrong form (%s) at DIE 0x%x"),
22348 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
22349 die
->offset
.sect_off
);
22352 /* Read DW_AT_associated and set in type. */
22353 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
22354 if (attr_form_is_block (attr
))
22356 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
22357 add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
, type
, objfile
);
22359 else if (attr
!= NULL
)
22361 complaint (&symfile_complaints
,
22362 _("DW_AT_associated has the wrong form (%s) at DIE 0x%x"),
22363 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
22364 die
->offset
.sect_off
);
22367 /* Read DW_AT_data_location and set in type. */
22368 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
22369 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
22370 add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
, type
, objfile
);
22372 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
22374 dwarf2_per_objfile
->die_type_hash
=
22375 htab_create_alloc_ex (127,
22376 per_cu_offset_and_type_hash
,
22377 per_cu_offset_and_type_eq
,
22379 &objfile
->objfile_obstack
,
22380 hashtab_obstack_allocate
,
22381 dummy_obstack_deallocate
);
22384 ofs
.per_cu
= cu
->per_cu
;
22385 ofs
.offset
= die
->offset
;
22387 slot
= (struct dwarf2_per_cu_offset_and_type
**)
22388 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
22390 complaint (&symfile_complaints
,
22391 _("A problem internal to GDB: DIE 0x%x has type already set"),
22392 die
->offset
.sect_off
);
22393 *slot
= XOBNEW (&objfile
->objfile_obstack
,
22394 struct dwarf2_per_cu_offset_and_type
);
22399 /* Look up the type for the die at OFFSET in PER_CU in die_type_hash,
22400 or return NULL if the die does not have a saved type. */
22402 static struct type
*
22403 get_die_type_at_offset (sect_offset offset
,
22404 struct dwarf2_per_cu_data
*per_cu
)
22406 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
22408 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
22411 ofs
.per_cu
= per_cu
;
22412 ofs
.offset
= offset
;
22413 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
22414 htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
));
22421 /* Look up the type for DIE in CU in die_type_hash,
22422 or return NULL if DIE does not have a saved type. */
22424 static struct type
*
22425 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22427 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
22430 /* Add a dependence relationship from CU to REF_PER_CU. */
22433 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
22434 struct dwarf2_per_cu_data
*ref_per_cu
)
22438 if (cu
->dependencies
== NULL
)
22440 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
22441 NULL
, &cu
->comp_unit_obstack
,
22442 hashtab_obstack_allocate
,
22443 dummy_obstack_deallocate
);
22445 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
22447 *slot
= ref_per_cu
;
22450 /* Subroutine of dwarf2_mark to pass to htab_traverse.
22451 Set the mark field in every compilation unit in the
22452 cache that we must keep because we are keeping CU. */
22455 dwarf2_mark_helper (void **slot
, void *data
)
22457 struct dwarf2_per_cu_data
*per_cu
;
22459 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
22461 /* cu->dependencies references may not yet have been ever read if QUIT aborts
22462 reading of the chain. As such dependencies remain valid it is not much
22463 useful to track and undo them during QUIT cleanups. */
22464 if (per_cu
->cu
== NULL
)
22467 if (per_cu
->cu
->mark
)
22469 per_cu
->cu
->mark
= 1;
22471 if (per_cu
->cu
->dependencies
!= NULL
)
22472 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
22477 /* Set the mark field in CU and in every other compilation unit in the
22478 cache that we must keep because we are keeping CU. */
22481 dwarf2_mark (struct dwarf2_cu
*cu
)
22486 if (cu
->dependencies
!= NULL
)
22487 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
22491 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
22495 per_cu
->cu
->mark
= 0;
22496 per_cu
= per_cu
->cu
->read_in_chain
;
22500 /* Trivial hash function for partial_die_info: the hash value of a DIE
22501 is its offset in .debug_info for this objfile. */
22504 partial_die_hash (const void *item
)
22506 const struct partial_die_info
*part_die
22507 = (const struct partial_die_info
*) item
;
22509 return part_die
->offset
.sect_off
;
22512 /* Trivial comparison function for partial_die_info structures: two DIEs
22513 are equal if they have the same offset. */
22516 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
22518 const struct partial_die_info
*part_die_lhs
22519 = (const struct partial_die_info
*) item_lhs
;
22520 const struct partial_die_info
*part_die_rhs
22521 = (const struct partial_die_info
*) item_rhs
;
22523 return part_die_lhs
->offset
.sect_off
== part_die_rhs
->offset
.sect_off
;
22526 static struct cmd_list_element
*set_dwarf_cmdlist
;
22527 static struct cmd_list_element
*show_dwarf_cmdlist
;
22530 set_dwarf_cmd (char *args
, int from_tty
)
22532 help_list (set_dwarf_cmdlist
, "maintenance set dwarf ", all_commands
,
22537 show_dwarf_cmd (char *args
, int from_tty
)
22539 cmd_show_list (show_dwarf_cmdlist
, from_tty
, "");
22542 /* Free data associated with OBJFILE, if necessary. */
22545 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
22547 struct dwarf2_per_objfile
*data
= (struct dwarf2_per_objfile
*) d
;
22550 /* Make sure we don't accidentally use dwarf2_per_objfile while
22552 dwarf2_per_objfile
= NULL
;
22554 for (ix
= 0; ix
< data
->n_comp_units
; ++ix
)
22555 VEC_free (dwarf2_per_cu_ptr
, data
->all_comp_units
[ix
]->imported_symtabs
);
22557 for (ix
= 0; ix
< data
->n_type_units
; ++ix
)
22558 VEC_free (dwarf2_per_cu_ptr
,
22559 data
->all_type_units
[ix
]->per_cu
.imported_symtabs
);
22560 xfree (data
->all_type_units
);
22562 VEC_free (dwarf2_section_info_def
, data
->types
);
22564 if (data
->dwo_files
)
22565 free_dwo_files (data
->dwo_files
, objfile
);
22566 if (data
->dwp_file
)
22567 gdb_bfd_unref (data
->dwp_file
->dbfd
);
22569 if (data
->dwz_file
&& data
->dwz_file
->dwz_bfd
)
22570 gdb_bfd_unref (data
->dwz_file
->dwz_bfd
);
22574 /* The "save gdb-index" command. */
22576 /* The contents of the hash table we create when building the string
22578 struct strtab_entry
22580 offset_type offset
;
22584 /* Hash function for a strtab_entry.
22586 Function is used only during write_hash_table so no index format backward
22587 compatibility is needed. */
22590 hash_strtab_entry (const void *e
)
22592 const struct strtab_entry
*entry
= (const struct strtab_entry
*) e
;
22593 return mapped_index_string_hash (INT_MAX
, entry
->str
);
22596 /* Equality function for a strtab_entry. */
22599 eq_strtab_entry (const void *a
, const void *b
)
22601 const struct strtab_entry
*ea
= (const struct strtab_entry
*) a
;
22602 const struct strtab_entry
*eb
= (const struct strtab_entry
*) b
;
22603 return !strcmp (ea
->str
, eb
->str
);
22606 /* Create a strtab_entry hash table. */
22609 create_strtab (void)
22611 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
22612 xfree
, xcalloc
, xfree
);
22615 /* Add a string to the constant pool. Return the string's offset in
22619 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
22622 struct strtab_entry entry
;
22623 struct strtab_entry
*result
;
22626 slot
= htab_find_slot (table
, &entry
, INSERT
);
22628 result
= (struct strtab_entry
*) *slot
;
22631 result
= XNEW (struct strtab_entry
);
22632 result
->offset
= obstack_object_size (cpool
);
22634 obstack_grow_str0 (cpool
, str
);
22637 return result
->offset
;
22640 /* An entry in the symbol table. */
22641 struct symtab_index_entry
22643 /* The name of the symbol. */
22645 /* The offset of the name in the constant pool. */
22646 offset_type index_offset
;
22647 /* A sorted vector of the indices of all the CUs that hold an object
22649 VEC (offset_type
) *cu_indices
;
22652 /* The symbol table. This is a power-of-2-sized hash table. */
22653 struct mapped_symtab
22655 offset_type n_elements
;
22657 struct symtab_index_entry
**data
;
22660 /* Hash function for a symtab_index_entry. */
22663 hash_symtab_entry (const void *e
)
22665 const struct symtab_index_entry
*entry
22666 = (const struct symtab_index_entry
*) e
;
22667 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
22668 sizeof (offset_type
) * VEC_length (offset_type
,
22669 entry
->cu_indices
),
22673 /* Equality function for a symtab_index_entry. */
22676 eq_symtab_entry (const void *a
, const void *b
)
22678 const struct symtab_index_entry
*ea
= (const struct symtab_index_entry
*) a
;
22679 const struct symtab_index_entry
*eb
= (const struct symtab_index_entry
*) b
;
22680 int len
= VEC_length (offset_type
, ea
->cu_indices
);
22681 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
22683 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
22684 VEC_address (offset_type
, eb
->cu_indices
),
22685 sizeof (offset_type
) * len
);
22688 /* Destroy a symtab_index_entry. */
22691 delete_symtab_entry (void *p
)
22693 struct symtab_index_entry
*entry
= (struct symtab_index_entry
*) p
;
22694 VEC_free (offset_type
, entry
->cu_indices
);
22698 /* Create a hash table holding symtab_index_entry objects. */
22701 create_symbol_hash_table (void)
22703 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
22704 delete_symtab_entry
, xcalloc
, xfree
);
22707 /* Create a new mapped symtab object. */
22709 static struct mapped_symtab
*
22710 create_mapped_symtab (void)
22712 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
22713 symtab
->n_elements
= 0;
22714 symtab
->size
= 1024;
22715 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
22719 /* Destroy a mapped_symtab. */
22722 cleanup_mapped_symtab (void *p
)
22724 struct mapped_symtab
*symtab
= (struct mapped_symtab
*) p
;
22725 /* The contents of the array are freed when the other hash table is
22727 xfree (symtab
->data
);
22731 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
22734 Function is used only during write_hash_table so no index format backward
22735 compatibility is needed. */
22737 static struct symtab_index_entry
**
22738 find_slot (struct mapped_symtab
*symtab
, const char *name
)
22740 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
22742 index
= hash
& (symtab
->size
- 1);
22743 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
22747 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
22748 return &symtab
->data
[index
];
22749 index
= (index
+ step
) & (symtab
->size
- 1);
22753 /* Expand SYMTAB's hash table. */
22756 hash_expand (struct mapped_symtab
*symtab
)
22758 offset_type old_size
= symtab
->size
;
22760 struct symtab_index_entry
**old_entries
= symtab
->data
;
22763 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
22765 for (i
= 0; i
< old_size
; ++i
)
22767 if (old_entries
[i
])
22769 struct symtab_index_entry
**slot
= find_slot (symtab
,
22770 old_entries
[i
]->name
);
22771 *slot
= old_entries
[i
];
22775 xfree (old_entries
);
22778 /* Add an entry to SYMTAB. NAME is the name of the symbol.
22779 CU_INDEX is the index of the CU in which the symbol appears.
22780 IS_STATIC is one if the symbol is static, otherwise zero (global). */
22783 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
22784 int is_static
, gdb_index_symbol_kind kind
,
22785 offset_type cu_index
)
22787 struct symtab_index_entry
**slot
;
22788 offset_type cu_index_and_attrs
;
22790 ++symtab
->n_elements
;
22791 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
22792 hash_expand (symtab
);
22794 slot
= find_slot (symtab
, name
);
22797 *slot
= XNEW (struct symtab_index_entry
);
22798 (*slot
)->name
= name
;
22799 /* index_offset is set later. */
22800 (*slot
)->cu_indices
= NULL
;
22803 cu_index_and_attrs
= 0;
22804 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs
, cu_index
);
22805 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs
, is_static
);
22806 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs
, kind
);
22808 /* We don't want to record an index value twice as we want to avoid the
22810 We process all global symbols and then all static symbols
22811 (which would allow us to avoid the duplication by only having to check
22812 the last entry pushed), but a symbol could have multiple kinds in one CU.
22813 To keep things simple we don't worry about the duplication here and
22814 sort and uniqufy the list after we've processed all symbols. */
22815 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index_and_attrs
);
22818 /* qsort helper routine for uniquify_cu_indices. */
22821 offset_type_compare (const void *ap
, const void *bp
)
22823 offset_type a
= *(offset_type
*) ap
;
22824 offset_type b
= *(offset_type
*) bp
;
22826 return (a
> b
) - (b
> a
);
22829 /* Sort and remove duplicates of all symbols' cu_indices lists. */
22832 uniquify_cu_indices (struct mapped_symtab
*symtab
)
22836 for (i
= 0; i
< symtab
->size
; ++i
)
22838 struct symtab_index_entry
*entry
= symtab
->data
[i
];
22841 && entry
->cu_indices
!= NULL
)
22843 unsigned int next_to_insert
, next_to_check
;
22844 offset_type last_value
;
22846 qsort (VEC_address (offset_type
, entry
->cu_indices
),
22847 VEC_length (offset_type
, entry
->cu_indices
),
22848 sizeof (offset_type
), offset_type_compare
);
22850 last_value
= VEC_index (offset_type
, entry
->cu_indices
, 0);
22851 next_to_insert
= 1;
22852 for (next_to_check
= 1;
22853 next_to_check
< VEC_length (offset_type
, entry
->cu_indices
);
22856 if (VEC_index (offset_type
, entry
->cu_indices
, next_to_check
)
22859 last_value
= VEC_index (offset_type
, entry
->cu_indices
,
22861 VEC_replace (offset_type
, entry
->cu_indices
, next_to_insert
,
22866 VEC_truncate (offset_type
, entry
->cu_indices
, next_to_insert
);
22871 /* Add a vector of indices to the constant pool. */
22874 add_indices_to_cpool (htab_t symbol_hash_table
, struct obstack
*cpool
,
22875 struct symtab_index_entry
*entry
)
22879 slot
= htab_find_slot (symbol_hash_table
, entry
, INSERT
);
22882 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
22883 offset_type val
= MAYBE_SWAP (len
);
22888 entry
->index_offset
= obstack_object_size (cpool
);
22890 obstack_grow (cpool
, &val
, sizeof (val
));
22892 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
22895 val
= MAYBE_SWAP (iter
);
22896 obstack_grow (cpool
, &val
, sizeof (val
));
22901 struct symtab_index_entry
*old_entry
22902 = (struct symtab_index_entry
*) *slot
;
22903 entry
->index_offset
= old_entry
->index_offset
;
22906 return entry
->index_offset
;
22909 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
22910 constant pool entries going into the obstack CPOOL. */
22913 write_hash_table (struct mapped_symtab
*symtab
,
22914 struct obstack
*output
, struct obstack
*cpool
)
22917 htab_t symbol_hash_table
;
22920 symbol_hash_table
= create_symbol_hash_table ();
22921 str_table
= create_strtab ();
22923 /* We add all the index vectors to the constant pool first, to
22924 ensure alignment is ok. */
22925 for (i
= 0; i
< symtab
->size
; ++i
)
22927 if (symtab
->data
[i
])
22928 add_indices_to_cpool (symbol_hash_table
, cpool
, symtab
->data
[i
]);
22931 /* Now write out the hash table. */
22932 for (i
= 0; i
< symtab
->size
; ++i
)
22934 offset_type str_off
, vec_off
;
22936 if (symtab
->data
[i
])
22938 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
22939 vec_off
= symtab
->data
[i
]->index_offset
;
22943 /* While 0 is a valid constant pool index, it is not valid
22944 to have 0 for both offsets. */
22949 str_off
= MAYBE_SWAP (str_off
);
22950 vec_off
= MAYBE_SWAP (vec_off
);
22952 obstack_grow (output
, &str_off
, sizeof (str_off
));
22953 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
22956 htab_delete (str_table
);
22957 htab_delete (symbol_hash_table
);
22960 /* Struct to map psymtab to CU index in the index file. */
22961 struct psymtab_cu_index_map
22963 struct partial_symtab
*psymtab
;
22964 unsigned int cu_index
;
22968 hash_psymtab_cu_index (const void *item
)
22970 const struct psymtab_cu_index_map
*map
22971 = (const struct psymtab_cu_index_map
*) item
;
22973 return htab_hash_pointer (map
->psymtab
);
22977 eq_psymtab_cu_index (const void *item_lhs
, const void *item_rhs
)
22979 const struct psymtab_cu_index_map
*lhs
22980 = (const struct psymtab_cu_index_map
*) item_lhs
;
22981 const struct psymtab_cu_index_map
*rhs
22982 = (const struct psymtab_cu_index_map
*) item_rhs
;
22984 return lhs
->psymtab
== rhs
->psymtab
;
22987 /* Helper struct for building the address table. */
22988 struct addrmap_index_data
22990 struct objfile
*objfile
;
22991 struct obstack
*addr_obstack
;
22992 htab_t cu_index_htab
;
22994 /* Non-zero if the previous_* fields are valid.
22995 We can't write an entry until we see the next entry (since it is only then
22996 that we know the end of the entry). */
22997 int previous_valid
;
22998 /* Index of the CU in the table of all CUs in the index file. */
22999 unsigned int previous_cu_index
;
23000 /* Start address of the CU. */
23001 CORE_ADDR previous_cu_start
;
23004 /* Write an address entry to OBSTACK. */
23007 add_address_entry (struct objfile
*objfile
, struct obstack
*obstack
,
23008 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
23010 offset_type cu_index_to_write
;
23012 CORE_ADDR baseaddr
;
23014 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
23016 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
23017 obstack_grow (obstack
, addr
, 8);
23018 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
23019 obstack_grow (obstack
, addr
, 8);
23020 cu_index_to_write
= MAYBE_SWAP (cu_index
);
23021 obstack_grow (obstack
, &cu_index_to_write
, sizeof (offset_type
));
23024 /* Worker function for traversing an addrmap to build the address table. */
23027 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
23029 struct addrmap_index_data
*data
= (struct addrmap_index_data
*) datap
;
23030 struct partial_symtab
*pst
= (struct partial_symtab
*) obj
;
23032 if (data
->previous_valid
)
23033 add_address_entry (data
->objfile
, data
->addr_obstack
,
23034 data
->previous_cu_start
, start_addr
,
23035 data
->previous_cu_index
);
23037 data
->previous_cu_start
= start_addr
;
23040 struct psymtab_cu_index_map find_map
, *map
;
23041 find_map
.psymtab
= pst
;
23042 map
= ((struct psymtab_cu_index_map
*)
23043 htab_find (data
->cu_index_htab
, &find_map
));
23044 gdb_assert (map
!= NULL
);
23045 data
->previous_cu_index
= map
->cu_index
;
23046 data
->previous_valid
= 1;
23049 data
->previous_valid
= 0;
23054 /* Write OBJFILE's address map to OBSTACK.
23055 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
23056 in the index file. */
23059 write_address_map (struct objfile
*objfile
, struct obstack
*obstack
,
23060 htab_t cu_index_htab
)
23062 struct addrmap_index_data addrmap_index_data
;
23064 /* When writing the address table, we have to cope with the fact that
23065 the addrmap iterator only provides the start of a region; we have to
23066 wait until the next invocation to get the start of the next region. */
23068 addrmap_index_data
.objfile
= objfile
;
23069 addrmap_index_data
.addr_obstack
= obstack
;
23070 addrmap_index_data
.cu_index_htab
= cu_index_htab
;
23071 addrmap_index_data
.previous_valid
= 0;
23073 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
23074 &addrmap_index_data
);
23076 /* It's highly unlikely the last entry (end address = 0xff...ff)
23077 is valid, but we should still handle it.
23078 The end address is recorded as the start of the next region, but that
23079 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
23081 if (addrmap_index_data
.previous_valid
)
23082 add_address_entry (objfile
, obstack
,
23083 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
23084 addrmap_index_data
.previous_cu_index
);
23087 /* Return the symbol kind of PSYM. */
23089 static gdb_index_symbol_kind
23090 symbol_kind (struct partial_symbol
*psym
)
23092 domain_enum domain
= PSYMBOL_DOMAIN (psym
);
23093 enum address_class aclass
= PSYMBOL_CLASS (psym
);
23101 return GDB_INDEX_SYMBOL_KIND_FUNCTION
;
23103 return GDB_INDEX_SYMBOL_KIND_TYPE
;
23105 case LOC_CONST_BYTES
:
23106 case LOC_OPTIMIZED_OUT
:
23108 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
23110 /* Note: It's currently impossible to recognize psyms as enum values
23111 short of reading the type info. For now punt. */
23112 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
23114 /* There are other LOC_FOO values that one might want to classify
23115 as variables, but dwarf2read.c doesn't currently use them. */
23116 return GDB_INDEX_SYMBOL_KIND_OTHER
;
23118 case STRUCT_DOMAIN
:
23119 return GDB_INDEX_SYMBOL_KIND_TYPE
;
23121 return GDB_INDEX_SYMBOL_KIND_OTHER
;
23125 /* Add a list of partial symbols to SYMTAB. */
23128 write_psymbols (struct mapped_symtab
*symtab
,
23130 struct partial_symbol
**psymp
,
23132 offset_type cu_index
,
23135 for (; count
-- > 0; ++psymp
)
23137 struct partial_symbol
*psym
= *psymp
;
23140 if (SYMBOL_LANGUAGE (psym
) == language_ada
)
23141 error (_("Ada is not currently supported by the index"));
23143 /* Only add a given psymbol once. */
23144 slot
= htab_find_slot (psyms_seen
, psym
, INSERT
);
23147 gdb_index_symbol_kind kind
= symbol_kind (psym
);
23150 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (psym
),
23151 is_static
, kind
, cu_index
);
23156 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
23157 exception if there is an error. */
23160 write_obstack (FILE *file
, struct obstack
*obstack
)
23162 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
23164 != obstack_object_size (obstack
))
23165 error (_("couldn't data write to file"));
23168 /* A helper struct used when iterating over debug_types. */
23169 struct signatured_type_index_data
23171 struct objfile
*objfile
;
23172 struct mapped_symtab
*symtab
;
23173 struct obstack
*types_list
;
23178 /* A helper function that writes a single signatured_type to an
23182 write_one_signatured_type (void **slot
, void *d
)
23184 struct signatured_type_index_data
*info
23185 = (struct signatured_type_index_data
*) d
;
23186 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
23187 struct partial_symtab
*psymtab
= entry
->per_cu
.v
.psymtab
;
23190 write_psymbols (info
->symtab
,
23192 info
->objfile
->global_psymbols
.list
23193 + psymtab
->globals_offset
,
23194 psymtab
->n_global_syms
, info
->cu_index
,
23196 write_psymbols (info
->symtab
,
23198 info
->objfile
->static_psymbols
.list
23199 + psymtab
->statics_offset
,
23200 psymtab
->n_static_syms
, info
->cu_index
,
23203 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23204 entry
->per_cu
.offset
.sect_off
);
23205 obstack_grow (info
->types_list
, val
, 8);
23206 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23207 entry
->type_offset_in_tu
.cu_off
);
23208 obstack_grow (info
->types_list
, val
, 8);
23209 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
23210 obstack_grow (info
->types_list
, val
, 8);
23217 /* Recurse into all "included" dependencies and write their symbols as
23218 if they appeared in this psymtab. */
23221 recursively_write_psymbols (struct objfile
*objfile
,
23222 struct partial_symtab
*psymtab
,
23223 struct mapped_symtab
*symtab
,
23225 offset_type cu_index
)
23229 for (i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
23230 if (psymtab
->dependencies
[i
]->user
!= NULL
)
23231 recursively_write_psymbols (objfile
, psymtab
->dependencies
[i
],
23232 symtab
, psyms_seen
, cu_index
);
23234 write_psymbols (symtab
,
23236 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
23237 psymtab
->n_global_syms
, cu_index
,
23239 write_psymbols (symtab
,
23241 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
23242 psymtab
->n_static_syms
, cu_index
,
23246 /* Create an index file for OBJFILE in the directory DIR. */
23249 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
23251 struct cleanup
*cleanup
;
23253 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
23254 struct obstack cu_list
, types_cu_list
;
23257 struct mapped_symtab
*symtab
;
23258 offset_type val
, size_of_contents
, total_len
;
23260 struct psymtab_cu_index_map
*psymtab_cu_index_map
;
23262 if (dwarf2_per_objfile
->using_index
)
23263 error (_("Cannot use an index to create the index"));
23265 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
23266 error (_("Cannot make an index when the file has multiple .debug_types sections"));
23268 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
23271 if (stat (objfile_name (objfile
), &st
) < 0)
23272 perror_with_name (objfile_name (objfile
));
23274 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile_name (objfile
)),
23275 INDEX_SUFFIX
, (char *) NULL
);
23276 cleanup
= make_cleanup (xfree
, filename
);
23278 out_file
= gdb_fopen_cloexec (filename
, "wb");
23280 error (_("Can't open `%s' for writing"), filename
);
23282 gdb::unlinker
unlink_file (filename
);
23284 symtab
= create_mapped_symtab ();
23285 make_cleanup (cleanup_mapped_symtab
, symtab
);
23287 obstack_init (&addr_obstack
);
23288 make_cleanup_obstack_free (&addr_obstack
);
23290 obstack_init (&cu_list
);
23291 make_cleanup_obstack_free (&cu_list
);
23293 obstack_init (&types_cu_list
);
23294 make_cleanup_obstack_free (&types_cu_list
);
23296 htab_up
psyms_seen (htab_create_alloc (100, htab_hash_pointer
,
23298 NULL
, xcalloc
, xfree
));
23300 /* While we're scanning CU's create a table that maps a psymtab pointer
23301 (which is what addrmap records) to its index (which is what is recorded
23302 in the index file). This will later be needed to write the address
23304 htab_up
cu_index_htab (htab_create_alloc (100,
23305 hash_psymtab_cu_index
,
23306 eq_psymtab_cu_index
,
23307 NULL
, xcalloc
, xfree
));
23308 psymtab_cu_index_map
= XNEWVEC (struct psymtab_cu_index_map
,
23309 dwarf2_per_objfile
->n_comp_units
);
23310 make_cleanup (xfree
, psymtab_cu_index_map
);
23312 /* The CU list is already sorted, so we don't need to do additional
23313 work here. Also, the debug_types entries do not appear in
23314 all_comp_units, but only in their own hash table. */
23315 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
23317 struct dwarf2_per_cu_data
*per_cu
23318 = dwarf2_per_objfile
->all_comp_units
[i
];
23319 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
23321 struct psymtab_cu_index_map
*map
;
23324 /* CU of a shared file from 'dwz -m' may be unused by this main file.
23325 It may be referenced from a local scope but in such case it does not
23326 need to be present in .gdb_index. */
23327 if (psymtab
== NULL
)
23330 if (psymtab
->user
== NULL
)
23331 recursively_write_psymbols (objfile
, psymtab
, symtab
,
23332 psyms_seen
.get (), i
);
23334 map
= &psymtab_cu_index_map
[i
];
23335 map
->psymtab
= psymtab
;
23337 slot
= htab_find_slot (cu_index_htab
.get (), map
, INSERT
);
23338 gdb_assert (slot
!= NULL
);
23339 gdb_assert (*slot
== NULL
);
23342 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23343 per_cu
->offset
.sect_off
);
23344 obstack_grow (&cu_list
, val
, 8);
23345 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
23346 obstack_grow (&cu_list
, val
, 8);
23349 /* Dump the address map. */
23350 write_address_map (objfile
, &addr_obstack
, cu_index_htab
.get ());
23352 /* Write out the .debug_type entries, if any. */
23353 if (dwarf2_per_objfile
->signatured_types
)
23355 struct signatured_type_index_data sig_data
;
23357 sig_data
.objfile
= objfile
;
23358 sig_data
.symtab
= symtab
;
23359 sig_data
.types_list
= &types_cu_list
;
23360 sig_data
.psyms_seen
= psyms_seen
.get ();
23361 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
23362 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
23363 write_one_signatured_type
, &sig_data
);
23366 /* Now that we've processed all symbols we can shrink their cu_indices
23368 uniquify_cu_indices (symtab
);
23370 obstack_init (&constant_pool
);
23371 make_cleanup_obstack_free (&constant_pool
);
23372 obstack_init (&symtab_obstack
);
23373 make_cleanup_obstack_free (&symtab_obstack
);
23374 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
23376 obstack_init (&contents
);
23377 make_cleanup_obstack_free (&contents
);
23378 size_of_contents
= 6 * sizeof (offset_type
);
23379 total_len
= size_of_contents
;
23381 /* The version number. */
23382 val
= MAYBE_SWAP (8);
23383 obstack_grow (&contents
, &val
, sizeof (val
));
23385 /* The offset of the CU list from the start of the file. */
23386 val
= MAYBE_SWAP (total_len
);
23387 obstack_grow (&contents
, &val
, sizeof (val
));
23388 total_len
+= obstack_object_size (&cu_list
);
23390 /* The offset of the types CU list from the start of the file. */
23391 val
= MAYBE_SWAP (total_len
);
23392 obstack_grow (&contents
, &val
, sizeof (val
));
23393 total_len
+= obstack_object_size (&types_cu_list
);
23395 /* The offset of the address table from the start of the file. */
23396 val
= MAYBE_SWAP (total_len
);
23397 obstack_grow (&contents
, &val
, sizeof (val
));
23398 total_len
+= obstack_object_size (&addr_obstack
);
23400 /* The offset of the symbol table from the start of the file. */
23401 val
= MAYBE_SWAP (total_len
);
23402 obstack_grow (&contents
, &val
, sizeof (val
));
23403 total_len
+= obstack_object_size (&symtab_obstack
);
23405 /* The offset of the constant pool from the start of the file. */
23406 val
= MAYBE_SWAP (total_len
);
23407 obstack_grow (&contents
, &val
, sizeof (val
));
23408 total_len
+= obstack_object_size (&constant_pool
);
23410 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
23412 write_obstack (out_file
, &contents
);
23413 write_obstack (out_file
, &cu_list
);
23414 write_obstack (out_file
, &types_cu_list
);
23415 write_obstack (out_file
, &addr_obstack
);
23416 write_obstack (out_file
, &symtab_obstack
);
23417 write_obstack (out_file
, &constant_pool
);
23421 /* We want to keep the file. */
23422 unlink_file
.keep ();
23424 do_cleanups (cleanup
);
23427 /* Implementation of the `save gdb-index' command.
23429 Note that the file format used by this command is documented in the
23430 GDB manual. Any changes here must be documented there. */
23433 save_gdb_index_command (char *arg
, int from_tty
)
23435 struct objfile
*objfile
;
23438 error (_("usage: save gdb-index DIRECTORY"));
23440 ALL_OBJFILES (objfile
)
23444 /* If the objfile does not correspond to an actual file, skip it. */
23445 if (stat (objfile_name (objfile
), &st
) < 0)
23449 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
23450 dwarf2_objfile_data_key
);
23451 if (dwarf2_per_objfile
)
23456 write_psymtabs_to_index (objfile
, arg
);
23458 CATCH (except
, RETURN_MASK_ERROR
)
23460 exception_fprintf (gdb_stderr
, except
,
23461 _("Error while writing index for `%s': "),
23462 objfile_name (objfile
));
23471 int dwarf_always_disassemble
;
23474 show_dwarf_always_disassemble (struct ui_file
*file
, int from_tty
,
23475 struct cmd_list_element
*c
, const char *value
)
23477 fprintf_filtered (file
,
23478 _("Whether to always disassemble "
23479 "DWARF expressions is %s.\n"),
23484 show_check_physname (struct ui_file
*file
, int from_tty
,
23485 struct cmd_list_element
*c
, const char *value
)
23487 fprintf_filtered (file
,
23488 _("Whether to check \"physname\" is %s.\n"),
23492 void _initialize_dwarf2_read (void);
23495 _initialize_dwarf2_read (void)
23497 struct cmd_list_element
*c
;
23499 dwarf2_objfile_data_key
23500 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
23502 add_prefix_cmd ("dwarf", class_maintenance
, set_dwarf_cmd
, _("\
23503 Set DWARF specific variables.\n\
23504 Configure DWARF variables such as the cache size"),
23505 &set_dwarf_cmdlist
, "maintenance set dwarf ",
23506 0/*allow-unknown*/, &maintenance_set_cmdlist
);
23508 add_prefix_cmd ("dwarf", class_maintenance
, show_dwarf_cmd
, _("\
23509 Show DWARF specific variables\n\
23510 Show DWARF variables such as the cache size"),
23511 &show_dwarf_cmdlist
, "maintenance show dwarf ",
23512 0/*allow-unknown*/, &maintenance_show_cmdlist
);
23514 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
23515 &dwarf_max_cache_age
, _("\
23516 Set the upper bound on the age of cached DWARF compilation units."), _("\
23517 Show the upper bound on the age of cached DWARF compilation units."), _("\
23518 A higher limit means that cached compilation units will be stored\n\
23519 in memory longer, and more total memory will be used. Zero disables\n\
23520 caching, which can slow down startup."),
23522 show_dwarf_max_cache_age
,
23523 &set_dwarf_cmdlist
,
23524 &show_dwarf_cmdlist
);
23526 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
23527 &dwarf_always_disassemble
, _("\
23528 Set whether `info address' always disassembles DWARF expressions."), _("\
23529 Show whether `info address' always disassembles DWARF expressions."), _("\
23530 When enabled, DWARF expressions are always printed in an assembly-like\n\
23531 syntax. When disabled, expressions will be printed in a more\n\
23532 conversational style, when possible."),
23534 show_dwarf_always_disassemble
,
23535 &set_dwarf_cmdlist
,
23536 &show_dwarf_cmdlist
);
23538 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
23539 Set debugging of the DWARF reader."), _("\
23540 Show debugging of the DWARF reader."), _("\
23541 When enabled (non-zero), debugging messages are printed during DWARF\n\
23542 reading and symtab expansion. A value of 1 (one) provides basic\n\
23543 information. A value greater than 1 provides more verbose information."),
23546 &setdebuglist
, &showdebuglist
);
23548 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
23549 Set debugging of the DWARF DIE reader."), _("\
23550 Show debugging of the DWARF DIE reader."), _("\
23551 When enabled (non-zero), DIEs are dumped after they are read in.\n\
23552 The value is the maximum depth to print."),
23555 &setdebuglist
, &showdebuglist
);
23557 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
23558 Set debugging of the dwarf line reader."), _("\
23559 Show debugging of the dwarf line reader."), _("\
23560 When enabled (non-zero), line number entries are dumped as they are read in.\n\
23561 A value of 1 (one) provides basic information.\n\
23562 A value greater than 1 provides more verbose information."),
23565 &setdebuglist
, &showdebuglist
);
23567 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
23568 Set cross-checking of \"physname\" code against demangler."), _("\
23569 Show cross-checking of \"physname\" code against demangler."), _("\
23570 When enabled, GDB's internal \"physname\" code is checked against\n\
23572 NULL
, show_check_physname
,
23573 &setdebuglist
, &showdebuglist
);
23575 add_setshow_boolean_cmd ("use-deprecated-index-sections",
23576 no_class
, &use_deprecated_index_sections
, _("\
23577 Set whether to use deprecated gdb_index sections."), _("\
23578 Show whether to use deprecated gdb_index sections."), _("\
23579 When enabled, deprecated .gdb_index sections are used anyway.\n\
23580 Normally they are ignored either because of a missing feature or\n\
23581 performance issue.\n\
23582 Warning: This option must be enabled before gdb reads the file."),
23585 &setlist
, &showlist
);
23587 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
23589 Save a gdb-index file.\n\
23590 Usage: save gdb-index DIRECTORY"),
23592 set_cmd_completer (c
, filename_completer
);
23594 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23595 &dwarf2_locexpr_funcs
);
23596 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23597 &dwarf2_loclist_funcs
);
23599 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23600 &dwarf2_block_frame_base_locexpr_funcs
);
23601 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23602 &dwarf2_block_frame_base_loclist_funcs
);