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 struct cleanup
*cleanups
= make_cleanup_discard_psymtabs (objfile
);
4276 dwarf2_build_psymtabs_hard (objfile
);
4277 discard_cleanups (cleanups
);
4279 CATCH (except
, RETURN_MASK_ERROR
)
4281 exception_print (gdb_stderr
, except
);
4286 /* Return the total length of the CU described by HEADER. */
4289 get_cu_length (const struct comp_unit_head
*header
)
4291 return header
->initial_length_size
+ header
->length
;
4294 /* Return TRUE if OFFSET is within CU_HEADER. */
4297 offset_in_cu_p (const struct comp_unit_head
*cu_header
, sect_offset offset
)
4299 sect_offset bottom
= { cu_header
->offset
.sect_off
};
4300 sect_offset top
= { cu_header
->offset
.sect_off
+ get_cu_length (cu_header
) };
4302 return (offset
.sect_off
>= bottom
.sect_off
&& offset
.sect_off
< top
.sect_off
);
4305 /* Find the base address of the compilation unit for range lists and
4306 location lists. It will normally be specified by DW_AT_low_pc.
4307 In DWARF-3 draft 4, the base address could be overridden by
4308 DW_AT_entry_pc. It's been removed, but GCC still uses this for
4309 compilation units with discontinuous ranges. */
4312 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
4314 struct attribute
*attr
;
4317 cu
->base_address
= 0;
4319 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
4322 cu
->base_address
= attr_value_as_address (attr
);
4327 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4330 cu
->base_address
= attr_value_as_address (attr
);
4336 /* Read in the comp unit header information from the debug_info at info_ptr.
4337 NOTE: This leaves members offset, first_die_offset to be filled in
4340 static const gdb_byte
*
4341 read_comp_unit_head (struct comp_unit_head
*cu_header
,
4342 const gdb_byte
*info_ptr
, bfd
*abfd
)
4345 unsigned int bytes_read
;
4347 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
4348 cu_header
->initial_length_size
= bytes_read
;
4349 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
4350 info_ptr
+= bytes_read
;
4351 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
4353 cu_header
->abbrev_offset
.sect_off
= read_offset (abfd
, info_ptr
, cu_header
,
4355 info_ptr
+= bytes_read
;
4356 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
4358 signed_addr
= bfd_get_sign_extend_vma (abfd
);
4359 if (signed_addr
< 0)
4360 internal_error (__FILE__
, __LINE__
,
4361 _("read_comp_unit_head: dwarf from non elf file"));
4362 cu_header
->signed_addr_p
= signed_addr
;
4367 /* Helper function that returns the proper abbrev section for
4370 static struct dwarf2_section_info
*
4371 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
4373 struct dwarf2_section_info
*abbrev
;
4375 if (this_cu
->is_dwz
)
4376 abbrev
= &dwarf2_get_dwz_file ()->abbrev
;
4378 abbrev
= &dwarf2_per_objfile
->abbrev
;
4383 /* Subroutine of read_and_check_comp_unit_head and
4384 read_and_check_type_unit_head to simplify them.
4385 Perform various error checking on the header. */
4388 error_check_comp_unit_head (struct comp_unit_head
*header
,
4389 struct dwarf2_section_info
*section
,
4390 struct dwarf2_section_info
*abbrev_section
)
4392 const char *filename
= get_section_file_name (section
);
4394 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
4395 error (_("Dwarf Error: wrong version in compilation unit header "
4396 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
4399 if (header
->abbrev_offset
.sect_off
4400 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
4401 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
4402 "(offset 0x%lx + 6) [in module %s]"),
4403 (long) header
->abbrev_offset
.sect_off
, (long) header
->offset
.sect_off
,
4406 /* Cast to unsigned long to use 64-bit arithmetic when possible to
4407 avoid potential 32-bit overflow. */
4408 if (((unsigned long) header
->offset
.sect_off
+ get_cu_length (header
))
4410 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
4411 "(offset 0x%lx + 0) [in module %s]"),
4412 (long) header
->length
, (long) header
->offset
.sect_off
,
4416 /* Read in a CU/TU header and perform some basic error checking.
4417 The contents of the header are stored in HEADER.
4418 The result is a pointer to the start of the first DIE. */
4420 static const gdb_byte
*
4421 read_and_check_comp_unit_head (struct comp_unit_head
*header
,
4422 struct dwarf2_section_info
*section
,
4423 struct dwarf2_section_info
*abbrev_section
,
4424 const gdb_byte
*info_ptr
,
4425 int is_debug_types_section
)
4427 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
4428 bfd
*abfd
= get_section_bfd_owner (section
);
4430 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4432 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
4434 /* If we're reading a type unit, skip over the signature and
4435 type_offset fields. */
4436 if (is_debug_types_section
)
4437 info_ptr
+= 8 /*signature*/ + header
->offset_size
;
4439 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4441 error_check_comp_unit_head (header
, section
, abbrev_section
);
4446 /* Read in the types comp unit header information from .debug_types entry at
4447 types_ptr. The result is a pointer to one past the end of the header. */
4449 static const gdb_byte
*
4450 read_and_check_type_unit_head (struct comp_unit_head
*header
,
4451 struct dwarf2_section_info
*section
,
4452 struct dwarf2_section_info
*abbrev_section
,
4453 const gdb_byte
*info_ptr
,
4454 ULONGEST
*signature
,
4455 cu_offset
*type_offset_in_tu
)
4457 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
4458 bfd
*abfd
= get_section_bfd_owner (section
);
4460 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4462 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
4464 /* If we're reading a type unit, skip over the signature and
4465 type_offset fields. */
4466 if (signature
!= NULL
)
4467 *signature
= read_8_bytes (abfd
, info_ptr
);
4469 if (type_offset_in_tu
!= NULL
)
4470 type_offset_in_tu
->cu_off
= read_offset_1 (abfd
, info_ptr
,
4471 header
->offset_size
);
4472 info_ptr
+= header
->offset_size
;
4474 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4476 error_check_comp_unit_head (header
, section
, abbrev_section
);
4481 /* Fetch the abbreviation table offset from a comp or type unit header. */
4484 read_abbrev_offset (struct dwarf2_section_info
*section
,
4487 bfd
*abfd
= get_section_bfd_owner (section
);
4488 const gdb_byte
*info_ptr
;
4489 unsigned int initial_length_size
, offset_size
;
4490 sect_offset abbrev_offset
;
4492 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
4493 info_ptr
= section
->buffer
+ offset
.sect_off
;
4494 read_initial_length (abfd
, info_ptr
, &initial_length_size
);
4495 offset_size
= initial_length_size
== 4 ? 4 : 8;
4496 info_ptr
+= initial_length_size
+ 2 /*version*/;
4497 abbrev_offset
.sect_off
= read_offset_1 (abfd
, info_ptr
, offset_size
);
4498 return abbrev_offset
;
4501 /* Allocate a new partial symtab for file named NAME and mark this new
4502 partial symtab as being an include of PST. */
4505 dwarf2_create_include_psymtab (const char *name
, struct partial_symtab
*pst
,
4506 struct objfile
*objfile
)
4508 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
4510 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
4512 /* It shares objfile->objfile_obstack. */
4513 subpst
->dirname
= pst
->dirname
;
4516 subpst
->textlow
= 0;
4517 subpst
->texthigh
= 0;
4519 subpst
->dependencies
4520 = XOBNEW (&objfile
->objfile_obstack
, struct partial_symtab
*);
4521 subpst
->dependencies
[0] = pst
;
4522 subpst
->number_of_dependencies
= 1;
4524 subpst
->globals_offset
= 0;
4525 subpst
->n_global_syms
= 0;
4526 subpst
->statics_offset
= 0;
4527 subpst
->n_static_syms
= 0;
4528 subpst
->compunit_symtab
= NULL
;
4529 subpst
->read_symtab
= pst
->read_symtab
;
4532 /* No private part is necessary for include psymtabs. This property
4533 can be used to differentiate between such include psymtabs and
4534 the regular ones. */
4535 subpst
->read_symtab_private
= NULL
;
4538 /* Read the Line Number Program data and extract the list of files
4539 included by the source file represented by PST. Build an include
4540 partial symtab for each of these included files. */
4543 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
4544 struct die_info
*die
,
4545 struct partial_symtab
*pst
)
4547 struct line_header
*lh
= NULL
;
4548 struct attribute
*attr
;
4550 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
4552 lh
= dwarf_decode_line_header (DW_UNSND (attr
), cu
);
4554 return; /* No linetable, so no includes. */
4556 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
4557 dwarf_decode_lines (lh
, pst
->dirname
, cu
, pst
, pst
->textlow
, 1);
4559 free_line_header (lh
);
4563 hash_signatured_type (const void *item
)
4565 const struct signatured_type
*sig_type
4566 = (const struct signatured_type
*) item
;
4568 /* This drops the top 32 bits of the signature, but is ok for a hash. */
4569 return sig_type
->signature
;
4573 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
4575 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
4576 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
4578 return lhs
->signature
== rhs
->signature
;
4581 /* Allocate a hash table for signatured types. */
4584 allocate_signatured_type_table (struct objfile
*objfile
)
4586 return htab_create_alloc_ex (41,
4587 hash_signatured_type
,
4590 &objfile
->objfile_obstack
,
4591 hashtab_obstack_allocate
,
4592 dummy_obstack_deallocate
);
4595 /* A helper function to add a signatured type CU to a table. */
4598 add_signatured_type_cu_to_table (void **slot
, void *datum
)
4600 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
4601 struct signatured_type
***datap
= (struct signatured_type
***) datum
;
4609 /* Create the hash table of all entries in the .debug_types
4610 (or .debug_types.dwo) section(s).
4611 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
4612 otherwise it is NULL.
4614 The result is a pointer to the hash table or NULL if there are no types.
4616 Note: This function processes DWO files only, not DWP files. */
4619 create_debug_types_hash_table (struct dwo_file
*dwo_file
,
4620 VEC (dwarf2_section_info_def
) *types
)
4622 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4623 htab_t types_htab
= NULL
;
4625 struct dwarf2_section_info
*section
;
4626 struct dwarf2_section_info
*abbrev_section
;
4628 if (VEC_empty (dwarf2_section_info_def
, types
))
4631 abbrev_section
= (dwo_file
!= NULL
4632 ? &dwo_file
->sections
.abbrev
4633 : &dwarf2_per_objfile
->abbrev
);
4635 if (dwarf_read_debug
)
4636 fprintf_unfiltered (gdb_stdlog
, "Reading .debug_types%s for %s:\n",
4637 dwo_file
? ".dwo" : "",
4638 get_section_file_name (abbrev_section
));
4641 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
4645 const gdb_byte
*info_ptr
, *end_ptr
;
4647 dwarf2_read_section (objfile
, section
);
4648 info_ptr
= section
->buffer
;
4650 if (info_ptr
== NULL
)
4653 /* We can't set abfd until now because the section may be empty or
4654 not present, in which case the bfd is unknown. */
4655 abfd
= get_section_bfd_owner (section
);
4657 /* We don't use init_cutu_and_read_dies_simple, or some such, here
4658 because we don't need to read any dies: the signature is in the
4661 end_ptr
= info_ptr
+ section
->size
;
4662 while (info_ptr
< end_ptr
)
4665 cu_offset type_offset_in_tu
;
4667 struct signatured_type
*sig_type
;
4668 struct dwo_unit
*dwo_tu
;
4670 const gdb_byte
*ptr
= info_ptr
;
4671 struct comp_unit_head header
;
4672 unsigned int length
;
4674 offset
.sect_off
= ptr
- section
->buffer
;
4676 /* We need to read the type's signature in order to build the hash
4677 table, but we don't need anything else just yet. */
4679 ptr
= read_and_check_type_unit_head (&header
, section
,
4680 abbrev_section
, ptr
,
4681 &signature
, &type_offset_in_tu
);
4683 length
= get_cu_length (&header
);
4685 /* Skip dummy type units. */
4686 if (ptr
>= info_ptr
+ length
4687 || peek_abbrev_code (abfd
, ptr
) == 0)
4693 if (types_htab
== NULL
)
4696 types_htab
= allocate_dwo_unit_table (objfile
);
4698 types_htab
= allocate_signatured_type_table (objfile
);
4704 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4706 dwo_tu
->dwo_file
= dwo_file
;
4707 dwo_tu
->signature
= signature
;
4708 dwo_tu
->type_offset_in_tu
= type_offset_in_tu
;
4709 dwo_tu
->section
= section
;
4710 dwo_tu
->offset
= offset
;
4711 dwo_tu
->length
= length
;
4715 /* N.B.: type_offset is not usable if this type uses a DWO file.
4716 The real type_offset is in the DWO file. */
4718 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4719 struct signatured_type
);
4720 sig_type
->signature
= signature
;
4721 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
4722 sig_type
->per_cu
.objfile
= objfile
;
4723 sig_type
->per_cu
.is_debug_types
= 1;
4724 sig_type
->per_cu
.section
= section
;
4725 sig_type
->per_cu
.offset
= offset
;
4726 sig_type
->per_cu
.length
= length
;
4729 slot
= htab_find_slot (types_htab
,
4730 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
4732 gdb_assert (slot
!= NULL
);
4735 sect_offset dup_offset
;
4739 const struct dwo_unit
*dup_tu
4740 = (const struct dwo_unit
*) *slot
;
4742 dup_offset
= dup_tu
->offset
;
4746 const struct signatured_type
*dup_tu
4747 = (const struct signatured_type
*) *slot
;
4749 dup_offset
= dup_tu
->per_cu
.offset
;
4752 complaint (&symfile_complaints
,
4753 _("debug type entry at offset 0x%x is duplicate to"
4754 " the entry at offset 0x%x, signature %s"),
4755 offset
.sect_off
, dup_offset
.sect_off
,
4756 hex_string (signature
));
4758 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
4760 if (dwarf_read_debug
> 1)
4761 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature %s\n",
4763 hex_string (signature
));
4772 /* Create the hash table of all entries in the .debug_types section,
4773 and initialize all_type_units.
4774 The result is zero if there is an error (e.g. missing .debug_types section),
4775 otherwise non-zero. */
4778 create_all_type_units (struct objfile
*objfile
)
4781 struct signatured_type
**iter
;
4783 types_htab
= create_debug_types_hash_table (NULL
, dwarf2_per_objfile
->types
);
4784 if (types_htab
== NULL
)
4786 dwarf2_per_objfile
->signatured_types
= NULL
;
4790 dwarf2_per_objfile
->signatured_types
= types_htab
;
4792 dwarf2_per_objfile
->n_type_units
4793 = dwarf2_per_objfile
->n_allocated_type_units
4794 = htab_elements (types_htab
);
4795 dwarf2_per_objfile
->all_type_units
=
4796 XNEWVEC (struct signatured_type
*, dwarf2_per_objfile
->n_type_units
);
4797 iter
= &dwarf2_per_objfile
->all_type_units
[0];
4798 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
4799 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
4800 == dwarf2_per_objfile
->n_type_units
);
4805 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
4806 If SLOT is non-NULL, it is the entry to use in the hash table.
4807 Otherwise we find one. */
4809 static struct signatured_type
*
4810 add_type_unit (ULONGEST sig
, void **slot
)
4812 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4813 int n_type_units
= dwarf2_per_objfile
->n_type_units
;
4814 struct signatured_type
*sig_type
;
4816 gdb_assert (n_type_units
<= dwarf2_per_objfile
->n_allocated_type_units
);
4818 if (n_type_units
> dwarf2_per_objfile
->n_allocated_type_units
)
4820 if (dwarf2_per_objfile
->n_allocated_type_units
== 0)
4821 dwarf2_per_objfile
->n_allocated_type_units
= 1;
4822 dwarf2_per_objfile
->n_allocated_type_units
*= 2;
4823 dwarf2_per_objfile
->all_type_units
4824 = XRESIZEVEC (struct signatured_type
*,
4825 dwarf2_per_objfile
->all_type_units
,
4826 dwarf2_per_objfile
->n_allocated_type_units
);
4827 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
4829 dwarf2_per_objfile
->n_type_units
= n_type_units
;
4831 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4832 struct signatured_type
);
4833 dwarf2_per_objfile
->all_type_units
[n_type_units
- 1] = sig_type
;
4834 sig_type
->signature
= sig
;
4835 sig_type
->per_cu
.is_debug_types
= 1;
4836 if (dwarf2_per_objfile
->using_index
)
4838 sig_type
->per_cu
.v
.quick
=
4839 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4840 struct dwarf2_per_cu_quick_data
);
4845 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4848 gdb_assert (*slot
== NULL
);
4850 /* The rest of sig_type must be filled in by the caller. */
4854 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
4855 Fill in SIG_ENTRY with DWO_ENTRY. */
4858 fill_in_sig_entry_from_dwo_entry (struct objfile
*objfile
,
4859 struct signatured_type
*sig_entry
,
4860 struct dwo_unit
*dwo_entry
)
4862 /* Make sure we're not clobbering something we don't expect to. */
4863 gdb_assert (! sig_entry
->per_cu
.queued
);
4864 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
4865 if (dwarf2_per_objfile
->using_index
)
4867 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
4868 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
4871 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
4872 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
4873 gdb_assert (sig_entry
->type_offset_in_section
.sect_off
== 0);
4874 gdb_assert (sig_entry
->type_unit_group
== NULL
);
4875 gdb_assert (sig_entry
->dwo_unit
== NULL
);
4877 sig_entry
->per_cu
.section
= dwo_entry
->section
;
4878 sig_entry
->per_cu
.offset
= dwo_entry
->offset
;
4879 sig_entry
->per_cu
.length
= dwo_entry
->length
;
4880 sig_entry
->per_cu
.reading_dwo_directly
= 1;
4881 sig_entry
->per_cu
.objfile
= objfile
;
4882 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
4883 sig_entry
->dwo_unit
= dwo_entry
;
4886 /* Subroutine of lookup_signatured_type.
4887 If we haven't read the TU yet, create the signatured_type data structure
4888 for a TU to be read in directly from a DWO file, bypassing the stub.
4889 This is the "Stay in DWO Optimization": When there is no DWP file and we're
4890 using .gdb_index, then when reading a CU we want to stay in the DWO file
4891 containing that CU. Otherwise we could end up reading several other DWO
4892 files (due to comdat folding) to process the transitive closure of all the
4893 mentioned TUs, and that can be slow. The current DWO file will have every
4894 type signature that it needs.
4895 We only do this for .gdb_index because in the psymtab case we already have
4896 to read all the DWOs to build the type unit groups. */
4898 static struct signatured_type
*
4899 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4901 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4902 struct dwo_file
*dwo_file
;
4903 struct dwo_unit find_dwo_entry
, *dwo_entry
;
4904 struct signatured_type find_sig_entry
, *sig_entry
;
4907 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
4909 /* If TU skeletons have been removed then we may not have read in any
4911 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4913 dwarf2_per_objfile
->signatured_types
4914 = allocate_signatured_type_table (objfile
);
4917 /* We only ever need to read in one copy of a signatured type.
4918 Use the global signatured_types array to do our own comdat-folding
4919 of types. If this is the first time we're reading this TU, and
4920 the TU has an entry in .gdb_index, replace the recorded data from
4921 .gdb_index with this TU. */
4923 find_sig_entry
.signature
= sig
;
4924 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4925 &find_sig_entry
, INSERT
);
4926 sig_entry
= (struct signatured_type
*) *slot
;
4928 /* We can get here with the TU already read, *or* in the process of being
4929 read. Don't reassign the global entry to point to this DWO if that's
4930 the case. Also note that if the TU is already being read, it may not
4931 have come from a DWO, the program may be a mix of Fission-compiled
4932 code and non-Fission-compiled code. */
4934 /* Have we already tried to read this TU?
4935 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
4936 needn't exist in the global table yet). */
4937 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
4940 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
4941 dwo_unit of the TU itself. */
4942 dwo_file
= cu
->dwo_unit
->dwo_file
;
4944 /* Ok, this is the first time we're reading this TU. */
4945 if (dwo_file
->tus
== NULL
)
4947 find_dwo_entry
.signature
= sig
;
4948 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_entry
);
4949 if (dwo_entry
== NULL
)
4952 /* If the global table doesn't have an entry for this TU, add one. */
4953 if (sig_entry
== NULL
)
4954 sig_entry
= add_type_unit (sig
, slot
);
4956 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
4957 sig_entry
->per_cu
.tu_read
= 1;
4961 /* Subroutine of lookup_signatured_type.
4962 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
4963 then try the DWP file. If the TU stub (skeleton) has been removed then
4964 it won't be in .gdb_index. */
4966 static struct signatured_type
*
4967 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4969 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4970 struct dwp_file
*dwp_file
= get_dwp_file ();
4971 struct dwo_unit
*dwo_entry
;
4972 struct signatured_type find_sig_entry
, *sig_entry
;
4975 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
4976 gdb_assert (dwp_file
!= NULL
);
4978 /* If TU skeletons have been removed then we may not have read in any
4980 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4982 dwarf2_per_objfile
->signatured_types
4983 = allocate_signatured_type_table (objfile
);
4986 find_sig_entry
.signature
= sig
;
4987 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4988 &find_sig_entry
, INSERT
);
4989 sig_entry
= (struct signatured_type
*) *slot
;
4991 /* Have we already tried to read this TU?
4992 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
4993 needn't exist in the global table yet). */
4994 if (sig_entry
!= NULL
)
4997 if (dwp_file
->tus
== NULL
)
4999 dwo_entry
= lookup_dwo_unit_in_dwp (dwp_file
, NULL
,
5000 sig
, 1 /* is_debug_types */);
5001 if (dwo_entry
== NULL
)
5004 sig_entry
= add_type_unit (sig
, slot
);
5005 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
5010 /* Lookup a signature based type for DW_FORM_ref_sig8.
5011 Returns NULL if signature SIG is not present in the table.
5012 It is up to the caller to complain about this. */
5014 static struct signatured_type
*
5015 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
5018 && dwarf2_per_objfile
->using_index
)
5020 /* We're in a DWO/DWP file, and we're using .gdb_index.
5021 These cases require special processing. */
5022 if (get_dwp_file () == NULL
)
5023 return lookup_dwo_signatured_type (cu
, sig
);
5025 return lookup_dwp_signatured_type (cu
, sig
);
5029 struct signatured_type find_entry
, *entry
;
5031 if (dwarf2_per_objfile
->signatured_types
== NULL
)
5033 find_entry
.signature
= sig
;
5034 entry
= ((struct signatured_type
*)
5035 htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
));
5040 /* Low level DIE reading support. */
5042 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
5045 init_cu_die_reader (struct die_reader_specs
*reader
,
5046 struct dwarf2_cu
*cu
,
5047 struct dwarf2_section_info
*section
,
5048 struct dwo_file
*dwo_file
)
5050 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
5051 reader
->abfd
= get_section_bfd_owner (section
);
5053 reader
->dwo_file
= dwo_file
;
5054 reader
->die_section
= section
;
5055 reader
->buffer
= section
->buffer
;
5056 reader
->buffer_end
= section
->buffer
+ section
->size
;
5057 reader
->comp_dir
= NULL
;
5060 /* Subroutine of init_cutu_and_read_dies to simplify it.
5061 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
5062 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
5065 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
5066 from it to the DIE in the DWO. If NULL we are skipping the stub.
5067 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
5068 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
5069 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
5070 STUB_COMP_DIR may be non-NULL.
5071 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
5072 are filled in with the info of the DIE from the DWO file.
5073 ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies
5074 provided an abbrev table to use.
5075 The result is non-zero if a valid (non-dummy) DIE was found. */
5078 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
5079 struct dwo_unit
*dwo_unit
,
5080 int abbrev_table_provided
,
5081 struct die_info
*stub_comp_unit_die
,
5082 const char *stub_comp_dir
,
5083 struct die_reader_specs
*result_reader
,
5084 const gdb_byte
**result_info_ptr
,
5085 struct die_info
**result_comp_unit_die
,
5086 int *result_has_children
)
5088 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5089 struct dwarf2_cu
*cu
= this_cu
->cu
;
5090 struct dwarf2_section_info
*section
;
5092 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5093 ULONGEST signature
; /* Or dwo_id. */
5094 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
5095 int i
,num_extra_attrs
;
5096 struct dwarf2_section_info
*dwo_abbrev_section
;
5097 struct attribute
*attr
;
5098 struct die_info
*comp_unit_die
;
5100 /* At most one of these may be provided. */
5101 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
5103 /* These attributes aren't processed until later:
5104 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
5105 DW_AT_comp_dir is used now, to find the DWO file, but it is also
5106 referenced later. However, these attributes are found in the stub
5107 which we won't have later. In order to not impose this complication
5108 on the rest of the code, we read them here and copy them to the
5117 if (stub_comp_unit_die
!= NULL
)
5119 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
5121 if (! this_cu
->is_debug_types
)
5122 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
5123 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
5124 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
5125 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
5126 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
5128 /* There should be a DW_AT_addr_base attribute here (if needed).
5129 We need the value before we can process DW_FORM_GNU_addr_index. */
5131 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
5133 cu
->addr_base
= DW_UNSND (attr
);
5135 /* There should be a DW_AT_ranges_base attribute here (if needed).
5136 We need the value before we can process DW_AT_ranges. */
5137 cu
->ranges_base
= 0;
5138 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
5140 cu
->ranges_base
= DW_UNSND (attr
);
5142 else if (stub_comp_dir
!= NULL
)
5144 /* Reconstruct the comp_dir attribute to simplify the code below. */
5145 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
5146 comp_dir
->name
= DW_AT_comp_dir
;
5147 comp_dir
->form
= DW_FORM_string
;
5148 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
5149 DW_STRING (comp_dir
) = stub_comp_dir
;
5152 /* Set up for reading the DWO CU/TU. */
5153 cu
->dwo_unit
= dwo_unit
;
5154 section
= dwo_unit
->section
;
5155 dwarf2_read_section (objfile
, section
);
5156 abfd
= get_section_bfd_owner (section
);
5157 begin_info_ptr
= info_ptr
= section
->buffer
+ dwo_unit
->offset
.sect_off
;
5158 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
5159 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
);
5161 if (this_cu
->is_debug_types
)
5163 ULONGEST header_signature
;
5164 cu_offset type_offset_in_tu
;
5165 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
5167 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
5171 &type_offset_in_tu
);
5172 /* This is not an assert because it can be caused by bad debug info. */
5173 if (sig_type
->signature
!= header_signature
)
5175 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
5176 " TU at offset 0x%x [in module %s]"),
5177 hex_string (sig_type
->signature
),
5178 hex_string (header_signature
),
5179 dwo_unit
->offset
.sect_off
,
5180 bfd_get_filename (abfd
));
5182 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5183 /* For DWOs coming from DWP files, we don't know the CU length
5184 nor the type's offset in the TU until now. */
5185 dwo_unit
->length
= get_cu_length (&cu
->header
);
5186 dwo_unit
->type_offset_in_tu
= type_offset_in_tu
;
5188 /* Establish the type offset that can be used to lookup the type.
5189 For DWO files, we don't know it until now. */
5190 sig_type
->type_offset_in_section
.sect_off
=
5191 dwo_unit
->offset
.sect_off
+ dwo_unit
->type_offset_in_tu
.cu_off
;
5195 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5198 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5199 /* For DWOs coming from DWP files, we don't know the CU length
5201 dwo_unit
->length
= get_cu_length (&cu
->header
);
5204 /* Replace the CU's original abbrev table with the DWO's.
5205 Reminder: We can't read the abbrev table until we've read the header. */
5206 if (abbrev_table_provided
)
5208 /* Don't free the provided abbrev table, the caller of
5209 init_cutu_and_read_dies owns it. */
5210 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5211 /* Ensure the DWO abbrev table gets freed. */
5212 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5216 dwarf2_free_abbrev_table (cu
);
5217 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5218 /* Leave any existing abbrev table cleanup as is. */
5221 /* Read in the die, but leave space to copy over the attributes
5222 from the stub. This has the benefit of simplifying the rest of
5223 the code - all the work to maintain the illusion of a single
5224 DW_TAG_{compile,type}_unit DIE is done here. */
5225 num_extra_attrs
= ((stmt_list
!= NULL
)
5229 + (comp_dir
!= NULL
));
5230 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
5231 result_has_children
, num_extra_attrs
);
5233 /* Copy over the attributes from the stub to the DIE we just read in. */
5234 comp_unit_die
= *result_comp_unit_die
;
5235 i
= comp_unit_die
->num_attrs
;
5236 if (stmt_list
!= NULL
)
5237 comp_unit_die
->attrs
[i
++] = *stmt_list
;
5239 comp_unit_die
->attrs
[i
++] = *low_pc
;
5240 if (high_pc
!= NULL
)
5241 comp_unit_die
->attrs
[i
++] = *high_pc
;
5243 comp_unit_die
->attrs
[i
++] = *ranges
;
5244 if (comp_dir
!= NULL
)
5245 comp_unit_die
->attrs
[i
++] = *comp_dir
;
5246 comp_unit_die
->num_attrs
+= num_extra_attrs
;
5248 if (dwarf_die_debug
)
5250 fprintf_unfiltered (gdb_stdlog
,
5251 "Read die from %s@0x%x of %s:\n",
5252 get_section_name (section
),
5253 (unsigned) (begin_info_ptr
- section
->buffer
),
5254 bfd_get_filename (abfd
));
5255 dump_die (comp_unit_die
, dwarf_die_debug
);
5258 /* Save the comp_dir attribute. If there is no DWP file then we'll read
5259 TUs by skipping the stub and going directly to the entry in the DWO file.
5260 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
5261 to get it via circuitous means. Blech. */
5262 if (comp_dir
!= NULL
)
5263 result_reader
->comp_dir
= DW_STRING (comp_dir
);
5265 /* Skip dummy compilation units. */
5266 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
5267 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5270 *result_info_ptr
= info_ptr
;
5274 /* Subroutine of init_cutu_and_read_dies to simplify it.
5275 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
5276 Returns NULL if the specified DWO unit cannot be found. */
5278 static struct dwo_unit
*
5279 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
5280 struct die_info
*comp_unit_die
)
5282 struct dwarf2_cu
*cu
= this_cu
->cu
;
5283 struct attribute
*attr
;
5285 struct dwo_unit
*dwo_unit
;
5286 const char *comp_dir
, *dwo_name
;
5288 gdb_assert (cu
!= NULL
);
5290 /* Yeah, we look dwo_name up again, but it simplifies the code. */
5291 dwo_name
= dwarf2_string_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5292 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
5294 if (this_cu
->is_debug_types
)
5296 struct signatured_type
*sig_type
;
5298 /* Since this_cu is the first member of struct signatured_type,
5299 we can go from a pointer to one to a pointer to the other. */
5300 sig_type
= (struct signatured_type
*) this_cu
;
5301 signature
= sig_type
->signature
;
5302 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
5306 struct attribute
*attr
;
5308 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
5310 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
5312 dwo_name
, objfile_name (this_cu
->objfile
));
5313 signature
= DW_UNSND (attr
);
5314 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
5321 /* Subroutine of init_cutu_and_read_dies to simplify it.
5322 See it for a description of the parameters.
5323 Read a TU directly from a DWO file, bypassing the stub.
5325 Note: This function could be a little bit simpler if we shared cleanups
5326 with our caller, init_cutu_and_read_dies. That's generally a fragile thing
5327 to do, so we keep this function self-contained. Or we could move this
5328 into our caller, but it's complex enough already. */
5331 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
5332 int use_existing_cu
, int keep
,
5333 die_reader_func_ftype
*die_reader_func
,
5336 struct dwarf2_cu
*cu
;
5337 struct signatured_type
*sig_type
;
5338 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5339 struct die_reader_specs reader
;
5340 const gdb_byte
*info_ptr
;
5341 struct die_info
*comp_unit_die
;
5344 /* Verify we can do the following downcast, and that we have the
5346 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
5347 sig_type
= (struct signatured_type
*) this_cu
;
5348 gdb_assert (sig_type
->dwo_unit
!= NULL
);
5350 cleanups
= make_cleanup (null_cleanup
, NULL
);
5352 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5354 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
5356 /* There's no need to do the rereading_dwo_cu handling that
5357 init_cutu_and_read_dies does since we don't read the stub. */
5361 /* If !use_existing_cu, this_cu->cu must be NULL. */
5362 gdb_assert (this_cu
->cu
== NULL
);
5363 cu
= XNEW (struct dwarf2_cu
);
5364 init_one_comp_unit (cu
, this_cu
);
5365 /* If an error occurs while loading, release our storage. */
5366 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5369 /* A future optimization, if needed, would be to use an existing
5370 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
5371 could share abbrev tables. */
5373 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
5374 0 /* abbrev_table_provided */,
5375 NULL
/* stub_comp_unit_die */,
5376 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
5378 &comp_unit_die
, &has_children
) == 0)
5381 do_cleanups (cleanups
);
5385 /* All the "real" work is done here. */
5386 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5388 /* This duplicates the code in init_cutu_and_read_dies,
5389 but the alternative is making the latter more complex.
5390 This function is only for the special case of using DWO files directly:
5391 no point in overly complicating the general case just to handle this. */
5392 if (free_cu_cleanup
!= NULL
)
5396 /* We've successfully allocated this compilation unit. Let our
5397 caller clean it up when finished with it. */
5398 discard_cleanups (free_cu_cleanup
);
5400 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5401 So we have to manually free the abbrev table. */
5402 dwarf2_free_abbrev_table (cu
);
5404 /* Link this CU into read_in_chain. */
5405 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5406 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5409 do_cleanups (free_cu_cleanup
);
5412 do_cleanups (cleanups
);
5415 /* Initialize a CU (or TU) and read its DIEs.
5416 If the CU defers to a DWO file, read the DWO file as well.
5418 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
5419 Otherwise the table specified in the comp unit header is read in and used.
5420 This is an optimization for when we already have the abbrev table.
5422 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
5423 Otherwise, a new CU is allocated with xmalloc.
5425 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
5426 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
5428 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5429 linker) then DIE_READER_FUNC will not get called. */
5432 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
5433 struct abbrev_table
*abbrev_table
,
5434 int use_existing_cu
, int keep
,
5435 die_reader_func_ftype
*die_reader_func
,
5438 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5439 struct dwarf2_section_info
*section
= this_cu
->section
;
5440 bfd
*abfd
= get_section_bfd_owner (section
);
5441 struct dwarf2_cu
*cu
;
5442 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5443 struct die_reader_specs reader
;
5444 struct die_info
*comp_unit_die
;
5446 struct attribute
*attr
;
5447 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5448 struct signatured_type
*sig_type
= NULL
;
5449 struct dwarf2_section_info
*abbrev_section
;
5450 /* Non-zero if CU currently points to a DWO file and we need to
5451 reread it. When this happens we need to reread the skeleton die
5452 before we can reread the DWO file (this only applies to CUs, not TUs). */
5453 int rereading_dwo_cu
= 0;
5455 if (dwarf_die_debug
)
5456 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5457 this_cu
->is_debug_types
? "type" : "comp",
5458 this_cu
->offset
.sect_off
);
5460 if (use_existing_cu
)
5463 /* If we're reading a TU directly from a DWO file, including a virtual DWO
5464 file (instead of going through the stub), short-circuit all of this. */
5465 if (this_cu
->reading_dwo_directly
)
5467 /* Narrow down the scope of possibilities to have to understand. */
5468 gdb_assert (this_cu
->is_debug_types
);
5469 gdb_assert (abbrev_table
== NULL
);
5470 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
, keep
,
5471 die_reader_func
, data
);
5475 cleanups
= make_cleanup (null_cleanup
, NULL
);
5477 /* This is cheap if the section is already read in. */
5478 dwarf2_read_section (objfile
, section
);
5480 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
5482 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
5484 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5487 /* If this CU is from a DWO file we need to start over, we need to
5488 refetch the attributes from the skeleton CU.
5489 This could be optimized by retrieving those attributes from when we
5490 were here the first time: the previous comp_unit_die was stored in
5491 comp_unit_obstack. But there's no data yet that we need this
5493 if (cu
->dwo_unit
!= NULL
)
5494 rereading_dwo_cu
= 1;
5498 /* If !use_existing_cu, this_cu->cu must be NULL. */
5499 gdb_assert (this_cu
->cu
== NULL
);
5500 cu
= XNEW (struct dwarf2_cu
);
5501 init_one_comp_unit (cu
, this_cu
);
5502 /* If an error occurs while loading, release our storage. */
5503 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5506 /* Get the header. */
5507 if (cu
->header
.first_die_offset
.cu_off
!= 0 && ! rereading_dwo_cu
)
5509 /* We already have the header, there's no need to read it in again. */
5510 info_ptr
+= cu
->header
.first_die_offset
.cu_off
;
5514 if (this_cu
->is_debug_types
)
5517 cu_offset type_offset_in_tu
;
5519 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
5520 abbrev_section
, info_ptr
,
5522 &type_offset_in_tu
);
5524 /* Since per_cu is the first member of struct signatured_type,
5525 we can go from a pointer to one to a pointer to the other. */
5526 sig_type
= (struct signatured_type
*) this_cu
;
5527 gdb_assert (sig_type
->signature
== signature
);
5528 gdb_assert (sig_type
->type_offset_in_tu
.cu_off
5529 == type_offset_in_tu
.cu_off
);
5530 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5532 /* LENGTH has not been set yet for type units if we're
5533 using .gdb_index. */
5534 this_cu
->length
= get_cu_length (&cu
->header
);
5536 /* Establish the type offset that can be used to lookup the type. */
5537 sig_type
->type_offset_in_section
.sect_off
=
5538 this_cu
->offset
.sect_off
+ sig_type
->type_offset_in_tu
.cu_off
;
5542 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5546 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5547 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
5551 /* Skip dummy compilation units. */
5552 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5553 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5555 do_cleanups (cleanups
);
5559 /* If we don't have them yet, read the abbrevs for this compilation unit.
5560 And if we need to read them now, make sure they're freed when we're
5561 done. Note that it's important that if the CU had an abbrev table
5562 on entry we don't free it when we're done: Somewhere up the call stack
5563 it may be in use. */
5564 if (abbrev_table
!= NULL
)
5566 gdb_assert (cu
->abbrev_table
== NULL
);
5567 gdb_assert (cu
->header
.abbrev_offset
.sect_off
5568 == abbrev_table
->offset
.sect_off
);
5569 cu
->abbrev_table
= abbrev_table
;
5571 else if (cu
->abbrev_table
== NULL
)
5573 dwarf2_read_abbrevs (cu
, abbrev_section
);
5574 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5576 else if (rereading_dwo_cu
)
5578 dwarf2_free_abbrev_table (cu
);
5579 dwarf2_read_abbrevs (cu
, abbrev_section
);
5582 /* Read the top level CU/TU die. */
5583 init_cu_die_reader (&reader
, cu
, section
, NULL
);
5584 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5586 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
5588 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
5589 DWO CU, that this test will fail (the attribute will not be present). */
5590 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5593 struct dwo_unit
*dwo_unit
;
5594 struct die_info
*dwo_comp_unit_die
;
5598 complaint (&symfile_complaints
,
5599 _("compilation unit with DW_AT_GNU_dwo_name"
5600 " has children (offset 0x%x) [in module %s]"),
5601 this_cu
->offset
.sect_off
, bfd_get_filename (abfd
));
5603 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
);
5604 if (dwo_unit
!= NULL
)
5606 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
5607 abbrev_table
!= NULL
,
5608 comp_unit_die
, NULL
,
5610 &dwo_comp_unit_die
, &has_children
) == 0)
5613 do_cleanups (cleanups
);
5616 comp_unit_die
= dwo_comp_unit_die
;
5620 /* Yikes, we couldn't find the rest of the DIE, we only have
5621 the stub. A complaint has already been logged. There's
5622 not much more we can do except pass on the stub DIE to
5623 die_reader_func. We don't want to throw an error on bad
5628 /* All of the above is setup for this call. Yikes. */
5629 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5631 /* Done, clean up. */
5632 if (free_cu_cleanup
!= NULL
)
5636 /* We've successfully allocated this compilation unit. Let our
5637 caller clean it up when finished with it. */
5638 discard_cleanups (free_cu_cleanup
);
5640 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5641 So we have to manually free the abbrev table. */
5642 dwarf2_free_abbrev_table (cu
);
5644 /* Link this CU into read_in_chain. */
5645 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5646 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5649 do_cleanups (free_cu_cleanup
);
5652 do_cleanups (cleanups
);
5655 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present.
5656 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed
5657 to have already done the lookup to find the DWO file).
5659 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
5660 THIS_CU->is_debug_types, but nothing else.
5662 We fill in THIS_CU->length.
5664 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5665 linker) then DIE_READER_FUNC will not get called.
5667 THIS_CU->cu is always freed when done.
5668 This is done in order to not leave THIS_CU->cu in a state where we have
5669 to care whether it refers to the "main" CU or the DWO CU. */
5672 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
5673 struct dwo_file
*dwo_file
,
5674 die_reader_func_ftype
*die_reader_func
,
5677 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5678 struct dwarf2_section_info
*section
= this_cu
->section
;
5679 bfd
*abfd
= get_section_bfd_owner (section
);
5680 struct dwarf2_section_info
*abbrev_section
;
5681 struct dwarf2_cu cu
;
5682 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5683 struct die_reader_specs reader
;
5684 struct cleanup
*cleanups
;
5685 struct die_info
*comp_unit_die
;
5688 if (dwarf_die_debug
)
5689 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5690 this_cu
->is_debug_types
? "type" : "comp",
5691 this_cu
->offset
.sect_off
);
5693 gdb_assert (this_cu
->cu
== NULL
);
5695 abbrev_section
= (dwo_file
!= NULL
5696 ? &dwo_file
->sections
.abbrev
5697 : get_abbrev_section_for_cu (this_cu
));
5699 /* This is cheap if the section is already read in. */
5700 dwarf2_read_section (objfile
, section
);
5702 init_one_comp_unit (&cu
, this_cu
);
5704 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
5706 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
5707 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, section
,
5708 abbrev_section
, info_ptr
,
5709 this_cu
->is_debug_types
);
5711 this_cu
->length
= get_cu_length (&cu
.header
);
5713 /* Skip dummy compilation units. */
5714 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5715 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5717 do_cleanups (cleanups
);
5721 dwarf2_read_abbrevs (&cu
, abbrev_section
);
5722 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
5724 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
);
5725 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5727 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5729 do_cleanups (cleanups
);
5732 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
5733 does not lookup the specified DWO file.
5734 This cannot be used to read DWO files.
5736 THIS_CU->cu is always freed when done.
5737 This is done in order to not leave THIS_CU->cu in a state where we have
5738 to care whether it refers to the "main" CU or the DWO CU.
5739 We can revisit this if the data shows there's a performance issue. */
5742 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
5743 die_reader_func_ftype
*die_reader_func
,
5746 init_cutu_and_read_dies_no_follow (this_cu
, NULL
, die_reader_func
, data
);
5749 /* Type Unit Groups.
5751 Type Unit Groups are a way to collapse the set of all TUs (type units) into
5752 a more manageable set. The grouping is done by DW_AT_stmt_list entry
5753 so that all types coming from the same compilation (.o file) are grouped
5754 together. A future step could be to put the types in the same symtab as
5755 the CU the types ultimately came from. */
5758 hash_type_unit_group (const void *item
)
5760 const struct type_unit_group
*tu_group
5761 = (const struct type_unit_group
*) item
;
5763 return hash_stmt_list_entry (&tu_group
->hash
);
5767 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
5769 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
5770 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
5772 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
5775 /* Allocate a hash table for type unit groups. */
5778 allocate_type_unit_groups_table (void)
5780 return htab_create_alloc_ex (3,
5781 hash_type_unit_group
,
5784 &dwarf2_per_objfile
->objfile
->objfile_obstack
,
5785 hashtab_obstack_allocate
,
5786 dummy_obstack_deallocate
);
5789 /* Type units that don't have DW_AT_stmt_list are grouped into their own
5790 partial symtabs. We combine several TUs per psymtab to not let the size
5791 of any one psymtab grow too big. */
5792 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
5793 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
5795 /* Helper routine for get_type_unit_group.
5796 Create the type_unit_group object used to hold one or more TUs. */
5798 static struct type_unit_group
*
5799 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
5801 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5802 struct dwarf2_per_cu_data
*per_cu
;
5803 struct type_unit_group
*tu_group
;
5805 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5806 struct type_unit_group
);
5807 per_cu
= &tu_group
->per_cu
;
5808 per_cu
->objfile
= objfile
;
5810 if (dwarf2_per_objfile
->using_index
)
5812 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5813 struct dwarf2_per_cu_quick_data
);
5817 unsigned int line_offset
= line_offset_struct
.sect_off
;
5818 struct partial_symtab
*pst
;
5821 /* Give the symtab a useful name for debug purposes. */
5822 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
5823 name
= xstrprintf ("<type_units_%d>",
5824 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
5826 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
5828 pst
= create_partial_symtab (per_cu
, name
);
5834 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
5835 tu_group
->hash
.line_offset
= line_offset_struct
;
5840 /* Look up the type_unit_group for type unit CU, and create it if necessary.
5841 STMT_LIST is a DW_AT_stmt_list attribute. */
5843 static struct type_unit_group
*
5844 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
5846 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
5847 struct type_unit_group
*tu_group
;
5849 unsigned int line_offset
;
5850 struct type_unit_group type_unit_group_for_lookup
;
5852 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
5854 dwarf2_per_objfile
->type_unit_groups
=
5855 allocate_type_unit_groups_table ();
5858 /* Do we need to create a new group, or can we use an existing one? */
5862 line_offset
= DW_UNSND (stmt_list
);
5863 ++tu_stats
->nr_symtab_sharers
;
5867 /* Ugh, no stmt_list. Rare, but we have to handle it.
5868 We can do various things here like create one group per TU or
5869 spread them over multiple groups to split up the expansion work.
5870 To avoid worst case scenarios (too many groups or too large groups)
5871 we, umm, group them in bunches. */
5872 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
5873 | (tu_stats
->nr_stmt_less_type_units
5874 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
5875 ++tu_stats
->nr_stmt_less_type_units
;
5878 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
5879 type_unit_group_for_lookup
.hash
.line_offset
.sect_off
= line_offset
;
5880 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
5881 &type_unit_group_for_lookup
, INSERT
);
5884 tu_group
= (struct type_unit_group
*) *slot
;
5885 gdb_assert (tu_group
!= NULL
);
5889 sect_offset line_offset_struct
;
5891 line_offset_struct
.sect_off
= line_offset
;
5892 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
5894 ++tu_stats
->nr_symtabs
;
5900 /* Partial symbol tables. */
5902 /* Create a psymtab named NAME and assign it to PER_CU.
5904 The caller must fill in the following details:
5905 dirname, textlow, texthigh. */
5907 static struct partial_symtab
*
5908 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
5910 struct objfile
*objfile
= per_cu
->objfile
;
5911 struct partial_symtab
*pst
;
5913 pst
= start_psymtab_common (objfile
, name
, 0,
5914 objfile
->global_psymbols
.next
,
5915 objfile
->static_psymbols
.next
);
5917 pst
->psymtabs_addrmap_supported
= 1;
5919 /* This is the glue that links PST into GDB's symbol API. */
5920 pst
->read_symtab_private
= per_cu
;
5921 pst
->read_symtab
= dwarf2_read_symtab
;
5922 per_cu
->v
.psymtab
= pst
;
5927 /* The DATA object passed to process_psymtab_comp_unit_reader has this
5930 struct process_psymtab_comp_unit_data
5932 /* True if we are reading a DW_TAG_partial_unit. */
5934 int want_partial_unit
;
5936 /* The "pretend" language that is used if the CU doesn't declare a
5939 enum language pretend_language
;
5942 /* die_reader_func for process_psymtab_comp_unit. */
5945 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
5946 const gdb_byte
*info_ptr
,
5947 struct die_info
*comp_unit_die
,
5951 struct dwarf2_cu
*cu
= reader
->cu
;
5952 struct objfile
*objfile
= cu
->objfile
;
5953 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
5954 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
5956 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
5957 struct partial_symtab
*pst
;
5958 enum pc_bounds_kind cu_bounds_kind
;
5959 const char *filename
;
5960 struct process_psymtab_comp_unit_data
*info
5961 = (struct process_psymtab_comp_unit_data
*) data
;
5963 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !info
->want_partial_unit
)
5966 gdb_assert (! per_cu
->is_debug_types
);
5968 prepare_one_comp_unit (cu
, comp_unit_die
, info
->pretend_language
);
5970 cu
->list_in_scope
= &file_symbols
;
5972 /* Allocate a new partial symbol table structure. */
5973 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
5974 if (filename
== NULL
)
5977 pst
= create_partial_symtab (per_cu
, filename
);
5979 /* This must be done before calling dwarf2_build_include_psymtabs. */
5980 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
5982 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5984 dwarf2_find_base_address (comp_unit_die
, cu
);
5986 /* Possibly set the default values of LOWPC and HIGHPC from
5988 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
5989 &best_highpc
, cu
, pst
);
5990 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
5991 /* Store the contiguous range if it is not empty; it can be empty for
5992 CUs with no code. */
5993 addrmap_set_empty (objfile
->psymtabs_addrmap
,
5994 gdbarch_adjust_dwarf2_addr (gdbarch
,
5995 best_lowpc
+ baseaddr
),
5996 gdbarch_adjust_dwarf2_addr (gdbarch
,
5997 best_highpc
+ baseaddr
) - 1,
6000 /* Check if comp unit has_children.
6001 If so, read the rest of the partial symbols from this comp unit.
6002 If not, there's no more debug_info for this comp unit. */
6005 struct partial_die_info
*first_die
;
6006 CORE_ADDR lowpc
, highpc
;
6008 lowpc
= ((CORE_ADDR
) -1);
6009 highpc
= ((CORE_ADDR
) 0);
6011 first_die
= load_partial_dies (reader
, info_ptr
, 1);
6013 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
6014 cu_bounds_kind
<= PC_BOUNDS_INVALID
, cu
);
6016 /* If we didn't find a lowpc, set it to highpc to avoid
6017 complaints from `maint check'. */
6018 if (lowpc
== ((CORE_ADDR
) -1))
6021 /* If the compilation unit didn't have an explicit address range,
6022 then use the information extracted from its child dies. */
6023 if (cu_bounds_kind
<= PC_BOUNDS_INVALID
)
6026 best_highpc
= highpc
;
6029 pst
->textlow
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
);
6030 pst
->texthigh
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
);
6032 end_psymtab_common (objfile
, pst
);
6034 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
6037 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
6038 struct dwarf2_per_cu_data
*iter
;
6040 /* Fill in 'dependencies' here; we fill in 'users' in a
6042 pst
->number_of_dependencies
= len
;
6044 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
6046 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
6049 pst
->dependencies
[i
] = iter
->v
.psymtab
;
6051 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
6054 /* Get the list of files included in the current compilation unit,
6055 and build a psymtab for each of them. */
6056 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
6058 if (dwarf_read_debug
)
6060 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6062 fprintf_unfiltered (gdb_stdlog
,
6063 "Psymtab for %s unit @0x%x: %s - %s"
6064 ", %d global, %d static syms\n",
6065 per_cu
->is_debug_types
? "type" : "comp",
6066 per_cu
->offset
.sect_off
,
6067 paddress (gdbarch
, pst
->textlow
),
6068 paddress (gdbarch
, pst
->texthigh
),
6069 pst
->n_global_syms
, pst
->n_static_syms
);
6073 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6074 Process compilation unit THIS_CU for a psymtab. */
6077 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
6078 int want_partial_unit
,
6079 enum language pretend_language
)
6081 struct process_psymtab_comp_unit_data info
;
6083 /* If this compilation unit was already read in, free the
6084 cached copy in order to read it in again. This is
6085 necessary because we skipped some symbols when we first
6086 read in the compilation unit (see load_partial_dies).
6087 This problem could be avoided, but the benefit is unclear. */
6088 if (this_cu
->cu
!= NULL
)
6089 free_one_cached_comp_unit (this_cu
);
6091 gdb_assert (! this_cu
->is_debug_types
);
6092 info
.want_partial_unit
= want_partial_unit
;
6093 info
.pretend_language
= pretend_language
;
6094 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0,
6095 process_psymtab_comp_unit_reader
,
6098 /* Age out any secondary CUs. */
6099 age_cached_comp_units ();
6102 /* Reader function for build_type_psymtabs. */
6105 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
6106 const gdb_byte
*info_ptr
,
6107 struct die_info
*type_unit_die
,
6111 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6112 struct dwarf2_cu
*cu
= reader
->cu
;
6113 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
6114 struct signatured_type
*sig_type
;
6115 struct type_unit_group
*tu_group
;
6116 struct attribute
*attr
;
6117 struct partial_die_info
*first_die
;
6118 CORE_ADDR lowpc
, highpc
;
6119 struct partial_symtab
*pst
;
6121 gdb_assert (data
== NULL
);
6122 gdb_assert (per_cu
->is_debug_types
);
6123 sig_type
= (struct signatured_type
*) per_cu
;
6128 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
6129 tu_group
= get_type_unit_group (cu
, attr
);
6131 VEC_safe_push (sig_type_ptr
, tu_group
->tus
, sig_type
);
6133 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
6134 cu
->list_in_scope
= &file_symbols
;
6135 pst
= create_partial_symtab (per_cu
, "");
6138 first_die
= load_partial_dies (reader
, info_ptr
, 1);
6140 lowpc
= (CORE_ADDR
) -1;
6141 highpc
= (CORE_ADDR
) 0;
6142 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
6144 end_psymtab_common (objfile
, pst
);
6147 /* Struct used to sort TUs by their abbreviation table offset. */
6149 struct tu_abbrev_offset
6151 struct signatured_type
*sig_type
;
6152 sect_offset abbrev_offset
;
6155 /* Helper routine for build_type_psymtabs_1, passed to qsort. */
6158 sort_tu_by_abbrev_offset (const void *ap
, const void *bp
)
6160 const struct tu_abbrev_offset
* const *a
6161 = (const struct tu_abbrev_offset
* const*) ap
;
6162 const struct tu_abbrev_offset
* const *b
6163 = (const struct tu_abbrev_offset
* const*) bp
;
6164 unsigned int aoff
= (*a
)->abbrev_offset
.sect_off
;
6165 unsigned int boff
= (*b
)->abbrev_offset
.sect_off
;
6167 return (aoff
> boff
) - (aoff
< boff
);
6170 /* Efficiently read all the type units.
6171 This does the bulk of the work for build_type_psymtabs.
6173 The efficiency is because we sort TUs by the abbrev table they use and
6174 only read each abbrev table once. In one program there are 200K TUs
6175 sharing 8K abbrev tables.
6177 The main purpose of this function is to support building the
6178 dwarf2_per_objfile->type_unit_groups table.
6179 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
6180 can collapse the search space by grouping them by stmt_list.
6181 The savings can be significant, in the same program from above the 200K TUs
6182 share 8K stmt_list tables.
6184 FUNC is expected to call get_type_unit_group, which will create the
6185 struct type_unit_group if necessary and add it to
6186 dwarf2_per_objfile->type_unit_groups. */
6189 build_type_psymtabs_1 (void)
6191 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6192 struct cleanup
*cleanups
;
6193 struct abbrev_table
*abbrev_table
;
6194 sect_offset abbrev_offset
;
6195 struct tu_abbrev_offset
*sorted_by_abbrev
;
6198 /* It's up to the caller to not call us multiple times. */
6199 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
6201 if (dwarf2_per_objfile
->n_type_units
== 0)
6204 /* TUs typically share abbrev tables, and there can be way more TUs than
6205 abbrev tables. Sort by abbrev table to reduce the number of times we
6206 read each abbrev table in.
6207 Alternatives are to punt or to maintain a cache of abbrev tables.
6208 This is simpler and efficient enough for now.
6210 Later we group TUs by their DW_AT_stmt_list value (as this defines the
6211 symtab to use). Typically TUs with the same abbrev offset have the same
6212 stmt_list value too so in practice this should work well.
6214 The basic algorithm here is:
6216 sort TUs by abbrev table
6217 for each TU with same abbrev table:
6218 read abbrev table if first user
6219 read TU top level DIE
6220 [IWBN if DWO skeletons had DW_AT_stmt_list]
6223 if (dwarf_read_debug
)
6224 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
6226 /* Sort in a separate table to maintain the order of all_type_units
6227 for .gdb_index: TU indices directly index all_type_units. */
6228 sorted_by_abbrev
= XNEWVEC (struct tu_abbrev_offset
,
6229 dwarf2_per_objfile
->n_type_units
);
6230 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6232 struct signatured_type
*sig_type
= dwarf2_per_objfile
->all_type_units
[i
];
6234 sorted_by_abbrev
[i
].sig_type
= sig_type
;
6235 sorted_by_abbrev
[i
].abbrev_offset
=
6236 read_abbrev_offset (sig_type
->per_cu
.section
,
6237 sig_type
->per_cu
.offset
);
6239 cleanups
= make_cleanup (xfree
, sorted_by_abbrev
);
6240 qsort (sorted_by_abbrev
, dwarf2_per_objfile
->n_type_units
,
6241 sizeof (struct tu_abbrev_offset
), sort_tu_by_abbrev_offset
);
6243 abbrev_offset
.sect_off
= ~(unsigned) 0;
6244 abbrev_table
= NULL
;
6245 make_cleanup (abbrev_table_free_cleanup
, &abbrev_table
);
6247 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6249 const struct tu_abbrev_offset
*tu
= &sorted_by_abbrev
[i
];
6251 /* Switch to the next abbrev table if necessary. */
6252 if (abbrev_table
== NULL
6253 || tu
->abbrev_offset
.sect_off
!= abbrev_offset
.sect_off
)
6255 if (abbrev_table
!= NULL
)
6257 abbrev_table_free (abbrev_table
);
6258 /* Reset to NULL in case abbrev_table_read_table throws
6259 an error: abbrev_table_free_cleanup will get called. */
6260 abbrev_table
= NULL
;
6262 abbrev_offset
= tu
->abbrev_offset
;
6264 abbrev_table_read_table (&dwarf2_per_objfile
->abbrev
,
6266 ++tu_stats
->nr_uniq_abbrev_tables
;
6269 init_cutu_and_read_dies (&tu
->sig_type
->per_cu
, abbrev_table
, 0, 0,
6270 build_type_psymtabs_reader
, NULL
);
6273 do_cleanups (cleanups
);
6276 /* Print collected type unit statistics. */
6279 print_tu_stats (void)
6281 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6283 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
6284 fprintf_unfiltered (gdb_stdlog
, " %d TUs\n",
6285 dwarf2_per_objfile
->n_type_units
);
6286 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
6287 tu_stats
->nr_uniq_abbrev_tables
);
6288 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
6289 tu_stats
->nr_symtabs
);
6290 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
6291 tu_stats
->nr_symtab_sharers
);
6292 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
6293 tu_stats
->nr_stmt_less_type_units
);
6294 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
6295 tu_stats
->nr_all_type_units_reallocs
);
6298 /* Traversal function for build_type_psymtabs. */
6301 build_type_psymtab_dependencies (void **slot
, void *info
)
6303 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6304 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
6305 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
6306 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6307 int len
= VEC_length (sig_type_ptr
, tu_group
->tus
);
6308 struct signatured_type
*iter
;
6311 gdb_assert (len
> 0);
6312 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
6314 pst
->number_of_dependencies
= len
;
6316 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
6318 VEC_iterate (sig_type_ptr
, tu_group
->tus
, i
, iter
);
6321 gdb_assert (iter
->per_cu
.is_debug_types
);
6322 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
6323 iter
->type_unit_group
= tu_group
;
6326 VEC_free (sig_type_ptr
, tu_group
->tus
);
6331 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6332 Build partial symbol tables for the .debug_types comp-units. */
6335 build_type_psymtabs (struct objfile
*objfile
)
6337 if (! create_all_type_units (objfile
))
6340 build_type_psymtabs_1 ();
6343 /* Traversal function for process_skeletonless_type_unit.
6344 Read a TU in a DWO file and build partial symbols for it. */
6347 process_skeletonless_type_unit (void **slot
, void *info
)
6349 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
6350 struct objfile
*objfile
= (struct objfile
*) info
;
6351 struct signatured_type find_entry
, *entry
;
6353 /* If this TU doesn't exist in the global table, add it and read it in. */
6355 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6357 dwarf2_per_objfile
->signatured_types
6358 = allocate_signatured_type_table (objfile
);
6361 find_entry
.signature
= dwo_unit
->signature
;
6362 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
, &find_entry
,
6364 /* If we've already seen this type there's nothing to do. What's happening
6365 is we're doing our own version of comdat-folding here. */
6369 /* This does the job that create_all_type_units would have done for
6371 entry
= add_type_unit (dwo_unit
->signature
, slot
);
6372 fill_in_sig_entry_from_dwo_entry (objfile
, entry
, dwo_unit
);
6375 /* This does the job that build_type_psymtabs_1 would have done. */
6376 init_cutu_and_read_dies (&entry
->per_cu
, NULL
, 0, 0,
6377 build_type_psymtabs_reader
, NULL
);
6382 /* Traversal function for process_skeletonless_type_units. */
6385 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
6387 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
6389 if (dwo_file
->tus
!= NULL
)
6391 htab_traverse_noresize (dwo_file
->tus
,
6392 process_skeletonless_type_unit
, info
);
6398 /* Scan all TUs of DWO files, verifying we've processed them.
6399 This is needed in case a TU was emitted without its skeleton.
6400 Note: This can't be done until we know what all the DWO files are. */
6403 process_skeletonless_type_units (struct objfile
*objfile
)
6405 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
6406 if (get_dwp_file () == NULL
6407 && dwarf2_per_objfile
->dwo_files
!= NULL
)
6409 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
,
6410 process_dwo_file_for_skeletonless_type_units
,
6415 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
6418 psymtabs_addrmap_cleanup (void *o
)
6420 struct objfile
*objfile
= (struct objfile
*) o
;
6422 objfile
->psymtabs_addrmap
= NULL
;
6425 /* Compute the 'user' field for each psymtab in OBJFILE. */
6428 set_partial_user (struct objfile
*objfile
)
6432 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6434 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6435 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6441 for (j
= 0; j
< pst
->number_of_dependencies
; ++j
)
6443 /* Set the 'user' field only if it is not already set. */
6444 if (pst
->dependencies
[j
]->user
== NULL
)
6445 pst
->dependencies
[j
]->user
= pst
;
6450 /* Build the partial symbol table by doing a quick pass through the
6451 .debug_info and .debug_abbrev sections. */
6454 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
6456 struct cleanup
*back_to
, *addrmap_cleanup
;
6457 struct obstack temp_obstack
;
6460 if (dwarf_read_debug
)
6462 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
6463 objfile_name (objfile
));
6466 dwarf2_per_objfile
->reading_partial_symbols
= 1;
6468 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
6470 /* Any cached compilation units will be linked by the per-objfile
6471 read_in_chain. Make sure to free them when we're done. */
6472 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
6474 build_type_psymtabs (objfile
);
6476 create_all_comp_units (objfile
);
6478 /* Create a temporary address map on a temporary obstack. We later
6479 copy this to the final obstack. */
6480 obstack_init (&temp_obstack
);
6481 make_cleanup_obstack_free (&temp_obstack
);
6482 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
6483 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
6485 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6487 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6489 process_psymtab_comp_unit (per_cu
, 0, language_minimal
);
6492 /* This has to wait until we read the CUs, we need the list of DWOs. */
6493 process_skeletonless_type_units (objfile
);
6495 /* Now that all TUs have been processed we can fill in the dependencies. */
6496 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
6498 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
6499 build_type_psymtab_dependencies
, NULL
);
6502 if (dwarf_read_debug
)
6505 set_partial_user (objfile
);
6507 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
6508 &objfile
->objfile_obstack
);
6509 discard_cleanups (addrmap_cleanup
);
6511 do_cleanups (back_to
);
6513 if (dwarf_read_debug
)
6514 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
6515 objfile_name (objfile
));
6518 /* die_reader_func for load_partial_comp_unit. */
6521 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
6522 const gdb_byte
*info_ptr
,
6523 struct die_info
*comp_unit_die
,
6527 struct dwarf2_cu
*cu
= reader
->cu
;
6529 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
6531 /* Check if comp unit has_children.
6532 If so, read the rest of the partial symbols from this comp unit.
6533 If not, there's no more debug_info for this comp unit. */
6535 load_partial_dies (reader
, info_ptr
, 0);
6538 /* Load the partial DIEs for a secondary CU into memory.
6539 This is also used when rereading a primary CU with load_all_dies. */
6542 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
6544 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
6545 load_partial_comp_unit_reader
, NULL
);
6549 read_comp_units_from_section (struct objfile
*objfile
,
6550 struct dwarf2_section_info
*section
,
6551 unsigned int is_dwz
,
6554 struct dwarf2_per_cu_data
***all_comp_units
)
6556 const gdb_byte
*info_ptr
;
6557 bfd
*abfd
= get_section_bfd_owner (section
);
6559 if (dwarf_read_debug
)
6560 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
6561 get_section_name (section
),
6562 get_section_file_name (section
));
6564 dwarf2_read_section (objfile
, section
);
6566 info_ptr
= section
->buffer
;
6568 while (info_ptr
< section
->buffer
+ section
->size
)
6570 unsigned int length
, initial_length_size
;
6571 struct dwarf2_per_cu_data
*this_cu
;
6574 offset
.sect_off
= info_ptr
- section
->buffer
;
6576 /* Read just enough information to find out where the next
6577 compilation unit is. */
6578 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6580 /* Save the compilation unit for later lookup. */
6581 this_cu
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_per_cu_data
);
6582 memset (this_cu
, 0, sizeof (*this_cu
));
6583 this_cu
->offset
= offset
;
6584 this_cu
->length
= length
+ initial_length_size
;
6585 this_cu
->is_dwz
= is_dwz
;
6586 this_cu
->objfile
= objfile
;
6587 this_cu
->section
= section
;
6589 if (*n_comp_units
== *n_allocated
)
6592 *all_comp_units
= XRESIZEVEC (struct dwarf2_per_cu_data
*,
6593 *all_comp_units
, *n_allocated
);
6595 (*all_comp_units
)[*n_comp_units
] = this_cu
;
6598 info_ptr
= info_ptr
+ this_cu
->length
;
6602 /* Create a list of all compilation units in OBJFILE.
6603 This is only done for -readnow and building partial symtabs. */
6606 create_all_comp_units (struct objfile
*objfile
)
6610 struct dwarf2_per_cu_data
**all_comp_units
;
6611 struct dwz_file
*dwz
;
6615 all_comp_units
= XNEWVEC (struct dwarf2_per_cu_data
*, n_allocated
);
6617 read_comp_units_from_section (objfile
, &dwarf2_per_objfile
->info
, 0,
6618 &n_allocated
, &n_comp_units
, &all_comp_units
);
6620 dwz
= dwarf2_get_dwz_file ();
6622 read_comp_units_from_section (objfile
, &dwz
->info
, 1,
6623 &n_allocated
, &n_comp_units
,
6626 dwarf2_per_objfile
->all_comp_units
= XOBNEWVEC (&objfile
->objfile_obstack
,
6627 struct dwarf2_per_cu_data
*,
6629 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
6630 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
6631 xfree (all_comp_units
);
6632 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
6635 /* Process all loaded DIEs for compilation unit CU, starting at
6636 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
6637 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
6638 DW_AT_ranges). See the comments of add_partial_subprogram on how
6639 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
6642 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
6643 CORE_ADDR
*highpc
, int set_addrmap
,
6644 struct dwarf2_cu
*cu
)
6646 struct partial_die_info
*pdi
;
6648 /* Now, march along the PDI's, descending into ones which have
6649 interesting children but skipping the children of the other ones,
6650 until we reach the end of the compilation unit. */
6656 fixup_partial_die (pdi
, cu
);
6658 /* Anonymous namespaces or modules have no name but have interesting
6659 children, so we need to look at them. Ditto for anonymous
6662 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
6663 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
6664 || pdi
->tag
== DW_TAG_imported_unit
)
6668 case DW_TAG_subprogram
:
6669 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6671 case DW_TAG_constant
:
6672 case DW_TAG_variable
:
6673 case DW_TAG_typedef
:
6674 case DW_TAG_union_type
:
6675 if (!pdi
->is_declaration
)
6677 add_partial_symbol (pdi
, cu
);
6680 case DW_TAG_class_type
:
6681 case DW_TAG_interface_type
:
6682 case DW_TAG_structure_type
:
6683 if (!pdi
->is_declaration
)
6685 add_partial_symbol (pdi
, cu
);
6687 if (cu
->language
== language_rust
&& pdi
->has_children
)
6688 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
6691 case DW_TAG_enumeration_type
:
6692 if (!pdi
->is_declaration
)
6693 add_partial_enumeration (pdi
, cu
);
6695 case DW_TAG_base_type
:
6696 case DW_TAG_subrange_type
:
6697 /* File scope base type definitions are added to the partial
6699 add_partial_symbol (pdi
, cu
);
6701 case DW_TAG_namespace
:
6702 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6705 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6707 case DW_TAG_imported_unit
:
6709 struct dwarf2_per_cu_data
*per_cu
;
6711 /* For now we don't handle imported units in type units. */
6712 if (cu
->per_cu
->is_debug_types
)
6714 error (_("Dwarf Error: DW_TAG_imported_unit is not"
6715 " supported in type units [in module %s]"),
6716 objfile_name (cu
->objfile
));
6719 per_cu
= dwarf2_find_containing_comp_unit (pdi
->d
.offset
,
6723 /* Go read the partial unit, if needed. */
6724 if (per_cu
->v
.psymtab
== NULL
)
6725 process_psymtab_comp_unit (per_cu
, 1, cu
->language
);
6727 VEC_safe_push (dwarf2_per_cu_ptr
,
6728 cu
->per_cu
->imported_symtabs
, per_cu
);
6731 case DW_TAG_imported_declaration
:
6732 add_partial_symbol (pdi
, cu
);
6739 /* If the die has a sibling, skip to the sibling. */
6741 pdi
= pdi
->die_sibling
;
6745 /* Functions used to compute the fully scoped name of a partial DIE.
6747 Normally, this is simple. For C++, the parent DIE's fully scoped
6748 name is concatenated with "::" and the partial DIE's name.
6749 Enumerators are an exception; they use the scope of their parent
6750 enumeration type, i.e. the name of the enumeration type is not
6751 prepended to the enumerator.
6753 There are two complexities. One is DW_AT_specification; in this
6754 case "parent" means the parent of the target of the specification,
6755 instead of the direct parent of the DIE. The other is compilers
6756 which do not emit DW_TAG_namespace; in this case we try to guess
6757 the fully qualified name of structure types from their members'
6758 linkage names. This must be done using the DIE's children rather
6759 than the children of any DW_AT_specification target. We only need
6760 to do this for structures at the top level, i.e. if the target of
6761 any DW_AT_specification (if any; otherwise the DIE itself) does not
6764 /* Compute the scope prefix associated with PDI's parent, in
6765 compilation unit CU. The result will be allocated on CU's
6766 comp_unit_obstack, or a copy of the already allocated PDI->NAME
6767 field. NULL is returned if no prefix is necessary. */
6769 partial_die_parent_scope (struct partial_die_info
*pdi
,
6770 struct dwarf2_cu
*cu
)
6772 const char *grandparent_scope
;
6773 struct partial_die_info
*parent
, *real_pdi
;
6775 /* We need to look at our parent DIE; if we have a DW_AT_specification,
6776 then this means the parent of the specification DIE. */
6779 while (real_pdi
->has_specification
)
6780 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
6781 real_pdi
->spec_is_dwz
, cu
);
6783 parent
= real_pdi
->die_parent
;
6787 if (parent
->scope_set
)
6788 return parent
->scope
;
6790 fixup_partial_die (parent
, cu
);
6792 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
6794 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
6795 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
6796 Work around this problem here. */
6797 if (cu
->language
== language_cplus
6798 && parent
->tag
== DW_TAG_namespace
6799 && strcmp (parent
->name
, "::") == 0
6800 && grandparent_scope
== NULL
)
6802 parent
->scope
= NULL
;
6803 parent
->scope_set
= 1;
6807 if (pdi
->tag
== DW_TAG_enumerator
)
6808 /* Enumerators should not get the name of the enumeration as a prefix. */
6809 parent
->scope
= grandparent_scope
;
6810 else if (parent
->tag
== DW_TAG_namespace
6811 || parent
->tag
== DW_TAG_module
6812 || parent
->tag
== DW_TAG_structure_type
6813 || parent
->tag
== DW_TAG_class_type
6814 || parent
->tag
== DW_TAG_interface_type
6815 || parent
->tag
== DW_TAG_union_type
6816 || parent
->tag
== DW_TAG_enumeration_type
)
6818 if (grandparent_scope
== NULL
)
6819 parent
->scope
= parent
->name
;
6821 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
6823 parent
->name
, 0, cu
);
6827 /* FIXME drow/2004-04-01: What should we be doing with
6828 function-local names? For partial symbols, we should probably be
6830 complaint (&symfile_complaints
,
6831 _("unhandled containing DIE tag %d for DIE at %d"),
6832 parent
->tag
, pdi
->offset
.sect_off
);
6833 parent
->scope
= grandparent_scope
;
6836 parent
->scope_set
= 1;
6837 return parent
->scope
;
6840 /* Return the fully scoped name associated with PDI, from compilation unit
6841 CU. The result will be allocated with malloc. */
6844 partial_die_full_name (struct partial_die_info
*pdi
,
6845 struct dwarf2_cu
*cu
)
6847 const char *parent_scope
;
6849 /* If this is a template instantiation, we can not work out the
6850 template arguments from partial DIEs. So, unfortunately, we have
6851 to go through the full DIEs. At least any work we do building
6852 types here will be reused if full symbols are loaded later. */
6853 if (pdi
->has_template_arguments
)
6855 fixup_partial_die (pdi
, cu
);
6857 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
6859 struct die_info
*die
;
6860 struct attribute attr
;
6861 struct dwarf2_cu
*ref_cu
= cu
;
6863 /* DW_FORM_ref_addr is using section offset. */
6864 attr
.name
= (enum dwarf_attribute
) 0;
6865 attr
.form
= DW_FORM_ref_addr
;
6866 attr
.u
.unsnd
= pdi
->offset
.sect_off
;
6867 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
6869 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
6873 parent_scope
= partial_die_parent_scope (pdi
, cu
);
6874 if (parent_scope
== NULL
)
6877 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
6881 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
6883 struct objfile
*objfile
= cu
->objfile
;
6884 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6886 const char *actual_name
= NULL
;
6888 char *built_actual_name
;
6890 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6892 built_actual_name
= partial_die_full_name (pdi
, cu
);
6893 if (built_actual_name
!= NULL
)
6894 actual_name
= built_actual_name
;
6896 if (actual_name
== NULL
)
6897 actual_name
= pdi
->name
;
6901 case DW_TAG_subprogram
:
6902 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
);
6903 if (pdi
->is_external
|| cu
->language
== language_ada
)
6905 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
6906 of the global scope. But in Ada, we want to be able to access
6907 nested procedures globally. So all Ada subprograms are stored
6908 in the global scope. */
6909 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6910 built_actual_name
!= NULL
,
6911 VAR_DOMAIN
, LOC_BLOCK
,
6912 &objfile
->global_psymbols
,
6913 addr
, cu
->language
, objfile
);
6917 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6918 built_actual_name
!= NULL
,
6919 VAR_DOMAIN
, LOC_BLOCK
,
6920 &objfile
->static_psymbols
,
6921 addr
, cu
->language
, objfile
);
6924 if (pdi
->main_subprogram
&& actual_name
!= NULL
)
6925 set_objfile_main_name (objfile
, actual_name
, cu
->language
);
6927 case DW_TAG_constant
:
6929 struct psymbol_allocation_list
*list
;
6931 if (pdi
->is_external
)
6932 list
= &objfile
->global_psymbols
;
6934 list
= &objfile
->static_psymbols
;
6935 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6936 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
6937 list
, 0, cu
->language
, objfile
);
6940 case DW_TAG_variable
:
6942 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
6946 && !dwarf2_per_objfile
->has_section_at_zero
)
6948 /* A global or static variable may also have been stripped
6949 out by the linker if unused, in which case its address
6950 will be nullified; do not add such variables into partial
6951 symbol table then. */
6953 else if (pdi
->is_external
)
6956 Don't enter into the minimal symbol tables as there is
6957 a minimal symbol table entry from the ELF symbols already.
6958 Enter into partial symbol table if it has a location
6959 descriptor or a type.
6960 If the location descriptor is missing, new_symbol will create
6961 a LOC_UNRESOLVED symbol, the address of the variable will then
6962 be determined from the minimal symbol table whenever the variable
6964 The address for the partial symbol table entry is not
6965 used by GDB, but it comes in handy for debugging partial symbol
6968 if (pdi
->d
.locdesc
|| pdi
->has_type
)
6969 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6970 built_actual_name
!= NULL
,
6971 VAR_DOMAIN
, LOC_STATIC
,
6972 &objfile
->global_psymbols
,
6974 cu
->language
, objfile
);
6978 int has_loc
= pdi
->d
.locdesc
!= NULL
;
6980 /* Static Variable. Skip symbols whose value we cannot know (those
6981 without location descriptors or constant values). */
6982 if (!has_loc
&& !pdi
->has_const_value
)
6984 xfree (built_actual_name
);
6988 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6989 built_actual_name
!= NULL
,
6990 VAR_DOMAIN
, LOC_STATIC
,
6991 &objfile
->static_psymbols
,
6992 has_loc
? addr
+ baseaddr
: (CORE_ADDR
) 0,
6993 cu
->language
, objfile
);
6996 case DW_TAG_typedef
:
6997 case DW_TAG_base_type
:
6998 case DW_TAG_subrange_type
:
6999 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7000 built_actual_name
!= NULL
,
7001 VAR_DOMAIN
, LOC_TYPEDEF
,
7002 &objfile
->static_psymbols
,
7003 0, cu
->language
, objfile
);
7005 case DW_TAG_imported_declaration
:
7006 case DW_TAG_namespace
:
7007 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7008 built_actual_name
!= NULL
,
7009 VAR_DOMAIN
, LOC_TYPEDEF
,
7010 &objfile
->global_psymbols
,
7011 0, cu
->language
, objfile
);
7014 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7015 built_actual_name
!= NULL
,
7016 MODULE_DOMAIN
, LOC_TYPEDEF
,
7017 &objfile
->global_psymbols
,
7018 0, cu
->language
, objfile
);
7020 case DW_TAG_class_type
:
7021 case DW_TAG_interface_type
:
7022 case DW_TAG_structure_type
:
7023 case DW_TAG_union_type
:
7024 case DW_TAG_enumeration_type
:
7025 /* Skip external references. The DWARF standard says in the section
7026 about "Structure, Union, and Class Type Entries": "An incomplete
7027 structure, union or class type is represented by a structure,
7028 union or class entry that does not have a byte size attribute
7029 and that has a DW_AT_declaration attribute." */
7030 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
7032 xfree (built_actual_name
);
7036 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
7037 static vs. global. */
7038 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7039 built_actual_name
!= NULL
,
7040 STRUCT_DOMAIN
, LOC_TYPEDEF
,
7041 cu
->language
== language_cplus
7042 ? &objfile
->global_psymbols
7043 : &objfile
->static_psymbols
,
7044 0, cu
->language
, objfile
);
7047 case DW_TAG_enumerator
:
7048 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7049 built_actual_name
!= NULL
,
7050 VAR_DOMAIN
, LOC_CONST
,
7051 cu
->language
== language_cplus
7052 ? &objfile
->global_psymbols
7053 : &objfile
->static_psymbols
,
7054 0, cu
->language
, objfile
);
7060 xfree (built_actual_name
);
7063 /* Read a partial die corresponding to a namespace; also, add a symbol
7064 corresponding to that namespace to the symbol table. NAMESPACE is
7065 the name of the enclosing namespace. */
7068 add_partial_namespace (struct partial_die_info
*pdi
,
7069 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7070 int set_addrmap
, struct dwarf2_cu
*cu
)
7072 /* Add a symbol for the namespace. */
7074 add_partial_symbol (pdi
, cu
);
7076 /* Now scan partial symbols in that namespace. */
7078 if (pdi
->has_children
)
7079 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7082 /* Read a partial die corresponding to a Fortran module. */
7085 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
7086 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
7088 /* Add a symbol for the namespace. */
7090 add_partial_symbol (pdi
, cu
);
7092 /* Now scan partial symbols in that module. */
7094 if (pdi
->has_children
)
7095 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7098 /* Read a partial die corresponding to a subprogram and create a partial
7099 symbol for that subprogram. When the CU language allows it, this
7100 routine also defines a partial symbol for each nested subprogram
7101 that this subprogram contains. If SET_ADDRMAP is true, record the
7102 covered ranges in the addrmap. Set *LOWPC and *HIGHPC to the lowest
7103 and highest PC values found in PDI.
7105 PDI may also be a lexical block, in which case we simply search
7106 recursively for subprograms defined inside that lexical block.
7107 Again, this is only performed when the CU language allows this
7108 type of definitions. */
7111 add_partial_subprogram (struct partial_die_info
*pdi
,
7112 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7113 int set_addrmap
, struct dwarf2_cu
*cu
)
7115 if (pdi
->tag
== DW_TAG_subprogram
)
7117 if (pdi
->has_pc_info
)
7119 if (pdi
->lowpc
< *lowpc
)
7120 *lowpc
= pdi
->lowpc
;
7121 if (pdi
->highpc
> *highpc
)
7122 *highpc
= pdi
->highpc
;
7125 struct objfile
*objfile
= cu
->objfile
;
7126 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7131 baseaddr
= ANOFFSET (objfile
->section_offsets
,
7132 SECT_OFF_TEXT (objfile
));
7133 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7134 pdi
->lowpc
+ baseaddr
);
7135 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7136 pdi
->highpc
+ baseaddr
);
7137 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
7138 cu
->per_cu
->v
.psymtab
);
7142 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
7144 if (!pdi
->is_declaration
)
7145 /* Ignore subprogram DIEs that do not have a name, they are
7146 illegal. Do not emit a complaint at this point, we will
7147 do so when we convert this psymtab into a symtab. */
7149 add_partial_symbol (pdi
, cu
);
7153 if (! pdi
->has_children
)
7156 if (cu
->language
== language_ada
)
7158 pdi
= pdi
->die_child
;
7161 fixup_partial_die (pdi
, cu
);
7162 if (pdi
->tag
== DW_TAG_subprogram
7163 || pdi
->tag
== DW_TAG_lexical_block
)
7164 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
7165 pdi
= pdi
->die_sibling
;
7170 /* Read a partial die corresponding to an enumeration type. */
7173 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
7174 struct dwarf2_cu
*cu
)
7176 struct partial_die_info
*pdi
;
7178 if (enum_pdi
->name
!= NULL
)
7179 add_partial_symbol (enum_pdi
, cu
);
7181 pdi
= enum_pdi
->die_child
;
7184 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
7185 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
7187 add_partial_symbol (pdi
, cu
);
7188 pdi
= pdi
->die_sibling
;
7192 /* Return the initial uleb128 in the die at INFO_PTR. */
7195 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
7197 unsigned int bytes_read
;
7199 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7202 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
7203 Return the corresponding abbrev, or NULL if the number is zero (indicating
7204 an empty DIE). In either case *BYTES_READ will be set to the length of
7205 the initial number. */
7207 static struct abbrev_info
*
7208 peek_die_abbrev (const gdb_byte
*info_ptr
, unsigned int *bytes_read
,
7209 struct dwarf2_cu
*cu
)
7211 bfd
*abfd
= cu
->objfile
->obfd
;
7212 unsigned int abbrev_number
;
7213 struct abbrev_info
*abbrev
;
7215 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
7217 if (abbrev_number
== 0)
7220 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
7223 error (_("Dwarf Error: Could not find abbrev number %d in %s"
7224 " at offset 0x%x [in module %s]"),
7225 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
7226 cu
->header
.offset
.sect_off
, bfd_get_filename (abfd
));
7232 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7233 Returns a pointer to the end of a series of DIEs, terminated by an empty
7234 DIE. Any children of the skipped DIEs will also be skipped. */
7236 static const gdb_byte
*
7237 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
7239 struct dwarf2_cu
*cu
= reader
->cu
;
7240 struct abbrev_info
*abbrev
;
7241 unsigned int bytes_read
;
7245 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
7247 return info_ptr
+ bytes_read
;
7249 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
7253 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7254 INFO_PTR should point just after the initial uleb128 of a DIE, and the
7255 abbrev corresponding to that skipped uleb128 should be passed in
7256 ABBREV. Returns a pointer to this DIE's sibling, skipping any
7259 static const gdb_byte
*
7260 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
7261 struct abbrev_info
*abbrev
)
7263 unsigned int bytes_read
;
7264 struct attribute attr
;
7265 bfd
*abfd
= reader
->abfd
;
7266 struct dwarf2_cu
*cu
= reader
->cu
;
7267 const gdb_byte
*buffer
= reader
->buffer
;
7268 const gdb_byte
*buffer_end
= reader
->buffer_end
;
7269 unsigned int form
, i
;
7271 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
7273 /* The only abbrev we care about is DW_AT_sibling. */
7274 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
7276 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
7277 if (attr
.form
== DW_FORM_ref_addr
)
7278 complaint (&symfile_complaints
,
7279 _("ignoring absolute DW_AT_sibling"));
7282 unsigned int off
= dwarf2_get_ref_die_offset (&attr
).sect_off
;
7283 const gdb_byte
*sibling_ptr
= buffer
+ off
;
7285 if (sibling_ptr
< info_ptr
)
7286 complaint (&symfile_complaints
,
7287 _("DW_AT_sibling points backwards"));
7288 else if (sibling_ptr
> reader
->buffer_end
)
7289 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
7295 /* If it isn't DW_AT_sibling, skip this attribute. */
7296 form
= abbrev
->attrs
[i
].form
;
7300 case DW_FORM_ref_addr
:
7301 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
7302 and later it is offset sized. */
7303 if (cu
->header
.version
== 2)
7304 info_ptr
+= cu
->header
.addr_size
;
7306 info_ptr
+= cu
->header
.offset_size
;
7308 case DW_FORM_GNU_ref_alt
:
7309 info_ptr
+= cu
->header
.offset_size
;
7312 info_ptr
+= cu
->header
.addr_size
;
7319 case DW_FORM_flag_present
:
7331 case DW_FORM_ref_sig8
:
7334 case DW_FORM_string
:
7335 read_direct_string (abfd
, info_ptr
, &bytes_read
);
7336 info_ptr
+= bytes_read
;
7338 case DW_FORM_sec_offset
:
7340 case DW_FORM_GNU_strp_alt
:
7341 info_ptr
+= cu
->header
.offset_size
;
7343 case DW_FORM_exprloc
:
7345 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7346 info_ptr
+= bytes_read
;
7348 case DW_FORM_block1
:
7349 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
7351 case DW_FORM_block2
:
7352 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
7354 case DW_FORM_block4
:
7355 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
7359 case DW_FORM_ref_udata
:
7360 case DW_FORM_GNU_addr_index
:
7361 case DW_FORM_GNU_str_index
:
7362 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
7364 case DW_FORM_indirect
:
7365 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7366 info_ptr
+= bytes_read
;
7367 /* We need to continue parsing from here, so just go back to
7369 goto skip_attribute
;
7372 error (_("Dwarf Error: Cannot handle %s "
7373 "in DWARF reader [in module %s]"),
7374 dwarf_form_name (form
),
7375 bfd_get_filename (abfd
));
7379 if (abbrev
->has_children
)
7380 return skip_children (reader
, info_ptr
);
7385 /* Locate ORIG_PDI's sibling.
7386 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
7388 static const gdb_byte
*
7389 locate_pdi_sibling (const struct die_reader_specs
*reader
,
7390 struct partial_die_info
*orig_pdi
,
7391 const gdb_byte
*info_ptr
)
7393 /* Do we know the sibling already? */
7395 if (orig_pdi
->sibling
)
7396 return orig_pdi
->sibling
;
7398 /* Are there any children to deal with? */
7400 if (!orig_pdi
->has_children
)
7403 /* Skip the children the long way. */
7405 return skip_children (reader
, info_ptr
);
7408 /* Expand this partial symbol table into a full symbol table. SELF is
7412 dwarf2_read_symtab (struct partial_symtab
*self
,
7413 struct objfile
*objfile
)
7417 warning (_("bug: psymtab for %s is already read in."),
7424 printf_filtered (_("Reading in symbols for %s..."),
7426 gdb_flush (gdb_stdout
);
7429 /* Restore our global data. */
7431 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
7432 dwarf2_objfile_data_key
);
7434 /* If this psymtab is constructed from a debug-only objfile, the
7435 has_section_at_zero flag will not necessarily be correct. We
7436 can get the correct value for this flag by looking at the data
7437 associated with the (presumably stripped) associated objfile. */
7438 if (objfile
->separate_debug_objfile_backlink
)
7440 struct dwarf2_per_objfile
*dpo_backlink
7441 = ((struct dwarf2_per_objfile
*)
7442 objfile_data (objfile
->separate_debug_objfile_backlink
,
7443 dwarf2_objfile_data_key
));
7445 dwarf2_per_objfile
->has_section_at_zero
7446 = dpo_backlink
->has_section_at_zero
;
7449 dwarf2_per_objfile
->reading_partial_symbols
= 0;
7451 psymtab_to_symtab_1 (self
);
7453 /* Finish up the debug error message. */
7455 printf_filtered (_("done.\n"));
7458 process_cu_includes ();
7461 /* Reading in full CUs. */
7463 /* Add PER_CU to the queue. */
7466 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
7467 enum language pretend_language
)
7469 struct dwarf2_queue_item
*item
;
7472 item
= XNEW (struct dwarf2_queue_item
);
7473 item
->per_cu
= per_cu
;
7474 item
->pretend_language
= pretend_language
;
7477 if (dwarf2_queue
== NULL
)
7478 dwarf2_queue
= item
;
7480 dwarf2_queue_tail
->next
= item
;
7482 dwarf2_queue_tail
= item
;
7485 /* If PER_CU is not yet queued, add it to the queue.
7486 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
7488 The result is non-zero if PER_CU was queued, otherwise the result is zero
7489 meaning either PER_CU is already queued or it is already loaded.
7491 N.B. There is an invariant here that if a CU is queued then it is loaded.
7492 The caller is required to load PER_CU if we return non-zero. */
7495 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
7496 struct dwarf2_per_cu_data
*per_cu
,
7497 enum language pretend_language
)
7499 /* We may arrive here during partial symbol reading, if we need full
7500 DIEs to process an unusual case (e.g. template arguments). Do
7501 not queue PER_CU, just tell our caller to load its DIEs. */
7502 if (dwarf2_per_objfile
->reading_partial_symbols
)
7504 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
7509 /* Mark the dependence relation so that we don't flush PER_CU
7511 if (dependent_cu
!= NULL
)
7512 dwarf2_add_dependence (dependent_cu
, per_cu
);
7514 /* If it's already on the queue, we have nothing to do. */
7518 /* If the compilation unit is already loaded, just mark it as
7520 if (per_cu
->cu
!= NULL
)
7522 per_cu
->cu
->last_used
= 0;
7526 /* Add it to the queue. */
7527 queue_comp_unit (per_cu
, pretend_language
);
7532 /* Process the queue. */
7535 process_queue (void)
7537 struct dwarf2_queue_item
*item
, *next_item
;
7539 if (dwarf_read_debug
)
7541 fprintf_unfiltered (gdb_stdlog
,
7542 "Expanding one or more symtabs of objfile %s ...\n",
7543 objfile_name (dwarf2_per_objfile
->objfile
));
7546 /* The queue starts out with one item, but following a DIE reference
7547 may load a new CU, adding it to the end of the queue. */
7548 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
7550 if ((dwarf2_per_objfile
->using_index
7551 ? !item
->per_cu
->v
.quick
->compunit_symtab
7552 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
7553 /* Skip dummy CUs. */
7554 && item
->per_cu
->cu
!= NULL
)
7556 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
7557 unsigned int debug_print_threshold
;
7560 if (per_cu
->is_debug_types
)
7562 struct signatured_type
*sig_type
=
7563 (struct signatured_type
*) per_cu
;
7565 sprintf (buf
, "TU %s at offset 0x%x",
7566 hex_string (sig_type
->signature
),
7567 per_cu
->offset
.sect_off
);
7568 /* There can be 100s of TUs.
7569 Only print them in verbose mode. */
7570 debug_print_threshold
= 2;
7574 sprintf (buf
, "CU at offset 0x%x", per_cu
->offset
.sect_off
);
7575 debug_print_threshold
= 1;
7578 if (dwarf_read_debug
>= debug_print_threshold
)
7579 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
7581 if (per_cu
->is_debug_types
)
7582 process_full_type_unit (per_cu
, item
->pretend_language
);
7584 process_full_comp_unit (per_cu
, item
->pretend_language
);
7586 if (dwarf_read_debug
>= debug_print_threshold
)
7587 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
7590 item
->per_cu
->queued
= 0;
7591 next_item
= item
->next
;
7595 dwarf2_queue_tail
= NULL
;
7597 if (dwarf_read_debug
)
7599 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
7600 objfile_name (dwarf2_per_objfile
->objfile
));
7604 /* Free all allocated queue entries. This function only releases anything if
7605 an error was thrown; if the queue was processed then it would have been
7606 freed as we went along. */
7609 dwarf2_release_queue (void *dummy
)
7611 struct dwarf2_queue_item
*item
, *last
;
7613 item
= dwarf2_queue
;
7616 /* Anything still marked queued is likely to be in an
7617 inconsistent state, so discard it. */
7618 if (item
->per_cu
->queued
)
7620 if (item
->per_cu
->cu
!= NULL
)
7621 free_one_cached_comp_unit (item
->per_cu
);
7622 item
->per_cu
->queued
= 0;
7630 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
7633 /* Read in full symbols for PST, and anything it depends on. */
7636 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
7638 struct dwarf2_per_cu_data
*per_cu
;
7644 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
7645 if (!pst
->dependencies
[i
]->readin
7646 && pst
->dependencies
[i
]->user
== NULL
)
7648 /* Inform about additional files that need to be read in. */
7651 /* FIXME: i18n: Need to make this a single string. */
7652 fputs_filtered (" ", gdb_stdout
);
7654 fputs_filtered ("and ", gdb_stdout
);
7656 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
7657 wrap_here (""); /* Flush output. */
7658 gdb_flush (gdb_stdout
);
7660 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
7663 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
7667 /* It's an include file, no symbols to read for it.
7668 Everything is in the parent symtab. */
7673 dw2_do_instantiate_symtab (per_cu
);
7676 /* Trivial hash function for die_info: the hash value of a DIE
7677 is its offset in .debug_info for this objfile. */
7680 die_hash (const void *item
)
7682 const struct die_info
*die
= (const struct die_info
*) item
;
7684 return die
->offset
.sect_off
;
7687 /* Trivial comparison function for die_info structures: two DIEs
7688 are equal if they have the same offset. */
7691 die_eq (const void *item_lhs
, const void *item_rhs
)
7693 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
7694 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
7696 return die_lhs
->offset
.sect_off
== die_rhs
->offset
.sect_off
;
7699 /* die_reader_func for load_full_comp_unit.
7700 This is identical to read_signatured_type_reader,
7701 but is kept separate for now. */
7704 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
7705 const gdb_byte
*info_ptr
,
7706 struct die_info
*comp_unit_die
,
7710 struct dwarf2_cu
*cu
= reader
->cu
;
7711 enum language
*language_ptr
= (enum language
*) data
;
7713 gdb_assert (cu
->die_hash
== NULL
);
7715 htab_create_alloc_ex (cu
->header
.length
/ 12,
7719 &cu
->comp_unit_obstack
,
7720 hashtab_obstack_allocate
,
7721 dummy_obstack_deallocate
);
7724 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
7725 &info_ptr
, comp_unit_die
);
7726 cu
->dies
= comp_unit_die
;
7727 /* comp_unit_die is not stored in die_hash, no need. */
7729 /* We try not to read any attributes in this function, because not
7730 all CUs needed for references have been loaded yet, and symbol
7731 table processing isn't initialized. But we have to set the CU language,
7732 or we won't be able to build types correctly.
7733 Similarly, if we do not read the producer, we can not apply
7734 producer-specific interpretation. */
7735 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
7738 /* Load the DIEs associated with PER_CU into memory. */
7741 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
7742 enum language pretend_language
)
7744 gdb_assert (! this_cu
->is_debug_types
);
7746 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
7747 load_full_comp_unit_reader
, &pretend_language
);
7750 /* Add a DIE to the delayed physname list. */
7753 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
7754 const char *name
, struct die_info
*die
,
7755 struct dwarf2_cu
*cu
)
7757 struct delayed_method_info mi
;
7759 mi
.fnfield_index
= fnfield_index
;
7763 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
7766 /* A cleanup for freeing the delayed method list. */
7769 free_delayed_list (void *ptr
)
7771 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
7772 if (cu
->method_list
!= NULL
)
7774 VEC_free (delayed_method_info
, cu
->method_list
);
7775 cu
->method_list
= NULL
;
7779 /* Compute the physnames of any methods on the CU's method list.
7781 The computation of method physnames is delayed in order to avoid the
7782 (bad) condition that one of the method's formal parameters is of an as yet
7786 compute_delayed_physnames (struct dwarf2_cu
*cu
)
7789 struct delayed_method_info
*mi
;
7790 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
7792 const char *physname
;
7793 struct fn_fieldlist
*fn_flp
7794 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
7795 physname
= dwarf2_physname (mi
->name
, mi
->die
, cu
);
7796 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
->index
)
7797 = physname
? physname
: "";
7801 /* Go objects should be embedded in a DW_TAG_module DIE,
7802 and it's not clear if/how imported objects will appear.
7803 To keep Go support simple until that's worked out,
7804 go back through what we've read and create something usable.
7805 We could do this while processing each DIE, and feels kinda cleaner,
7806 but that way is more invasive.
7807 This is to, for example, allow the user to type "p var" or "b main"
7808 without having to specify the package name, and allow lookups
7809 of module.object to work in contexts that use the expression
7813 fixup_go_packaging (struct dwarf2_cu
*cu
)
7815 char *package_name
= NULL
;
7816 struct pending
*list
;
7819 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
7821 for (i
= 0; i
< list
->nsyms
; ++i
)
7823 struct symbol
*sym
= list
->symbol
[i
];
7825 if (SYMBOL_LANGUAGE (sym
) == language_go
7826 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
7828 char *this_package_name
= go_symbol_package_name (sym
);
7830 if (this_package_name
== NULL
)
7832 if (package_name
== NULL
)
7833 package_name
= this_package_name
;
7836 if (strcmp (package_name
, this_package_name
) != 0)
7837 complaint (&symfile_complaints
,
7838 _("Symtab %s has objects from two different Go packages: %s and %s"),
7839 (symbol_symtab (sym
) != NULL
7840 ? symtab_to_filename_for_display
7841 (symbol_symtab (sym
))
7842 : objfile_name (cu
->objfile
)),
7843 this_package_name
, package_name
);
7844 xfree (this_package_name
);
7850 if (package_name
!= NULL
)
7852 struct objfile
*objfile
= cu
->objfile
;
7853 const char *saved_package_name
7854 = (const char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
7856 strlen (package_name
));
7857 struct type
*type
= init_type (objfile
, TYPE_CODE_MODULE
, 0,
7858 saved_package_name
);
7861 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
7863 sym
= allocate_symbol (objfile
);
7864 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
7865 SYMBOL_SET_NAMES (sym
, saved_package_name
,
7866 strlen (saved_package_name
), 0, objfile
);
7867 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
7868 e.g., "main" finds the "main" module and not C's main(). */
7869 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
7870 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
7871 SYMBOL_TYPE (sym
) = type
;
7873 add_symbol_to_list (sym
, &global_symbols
);
7875 xfree (package_name
);
7879 /* Return the symtab for PER_CU. This works properly regardless of
7880 whether we're using the index or psymtabs. */
7882 static struct compunit_symtab
*
7883 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
7885 return (dwarf2_per_objfile
->using_index
7886 ? per_cu
->v
.quick
->compunit_symtab
7887 : per_cu
->v
.psymtab
->compunit_symtab
);
7890 /* A helper function for computing the list of all symbol tables
7891 included by PER_CU. */
7894 recursively_compute_inclusions (VEC (compunit_symtab_ptr
) **result
,
7895 htab_t all_children
, htab_t all_type_symtabs
,
7896 struct dwarf2_per_cu_data
*per_cu
,
7897 struct compunit_symtab
*immediate_parent
)
7901 struct compunit_symtab
*cust
;
7902 struct dwarf2_per_cu_data
*iter
;
7904 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
7907 /* This inclusion and its children have been processed. */
7912 /* Only add a CU if it has a symbol table. */
7913 cust
= get_compunit_symtab (per_cu
);
7916 /* If this is a type unit only add its symbol table if we haven't
7917 seen it yet (type unit per_cu's can share symtabs). */
7918 if (per_cu
->is_debug_types
)
7920 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
7924 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
7925 if (cust
->user
== NULL
)
7926 cust
->user
= immediate_parent
;
7931 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
7932 if (cust
->user
== NULL
)
7933 cust
->user
= immediate_parent
;
7938 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
7941 recursively_compute_inclusions (result
, all_children
,
7942 all_type_symtabs
, iter
, cust
);
7946 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
7950 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
7952 gdb_assert (! per_cu
->is_debug_types
);
7954 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
7957 struct dwarf2_per_cu_data
*per_cu_iter
;
7958 struct compunit_symtab
*compunit_symtab_iter
;
7959 VEC (compunit_symtab_ptr
) *result_symtabs
= NULL
;
7960 htab_t all_children
, all_type_symtabs
;
7961 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
7963 /* If we don't have a symtab, we can just skip this case. */
7967 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
7968 NULL
, xcalloc
, xfree
);
7969 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
7970 NULL
, xcalloc
, xfree
);
7973 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
7977 recursively_compute_inclusions (&result_symtabs
, all_children
,
7978 all_type_symtabs
, per_cu_iter
,
7982 /* Now we have a transitive closure of all the included symtabs. */
7983 len
= VEC_length (compunit_symtab_ptr
, result_symtabs
);
7985 = XOBNEWVEC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
7986 struct compunit_symtab
*, len
+ 1);
7988 VEC_iterate (compunit_symtab_ptr
, result_symtabs
, ix
,
7989 compunit_symtab_iter
);
7991 cust
->includes
[ix
] = compunit_symtab_iter
;
7992 cust
->includes
[len
] = NULL
;
7994 VEC_free (compunit_symtab_ptr
, result_symtabs
);
7995 htab_delete (all_children
);
7996 htab_delete (all_type_symtabs
);
8000 /* Compute the 'includes' field for the symtabs of all the CUs we just
8004 process_cu_includes (void)
8007 struct dwarf2_per_cu_data
*iter
;
8010 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
8014 if (! iter
->is_debug_types
)
8015 compute_compunit_symtab_includes (iter
);
8018 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
8021 /* Generate full symbol information for PER_CU, whose DIEs have
8022 already been loaded into memory. */
8025 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
8026 enum language pretend_language
)
8028 struct dwarf2_cu
*cu
= per_cu
->cu
;
8029 struct objfile
*objfile
= per_cu
->objfile
;
8030 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8031 CORE_ADDR lowpc
, highpc
;
8032 struct compunit_symtab
*cust
;
8033 struct cleanup
*back_to
, *delayed_list_cleanup
;
8035 struct block
*static_block
;
8038 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8041 back_to
= make_cleanup (really_free_pendings
, NULL
);
8042 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
8044 cu
->list_in_scope
= &file_symbols
;
8046 cu
->language
= pretend_language
;
8047 cu
->language_defn
= language_def (cu
->language
);
8049 /* Do line number decoding in read_file_scope () */
8050 process_die (cu
->dies
, cu
);
8052 /* For now fudge the Go package. */
8053 if (cu
->language
== language_go
)
8054 fixup_go_packaging (cu
);
8056 /* Now that we have processed all the DIEs in the CU, all the types
8057 should be complete, and it should now be safe to compute all of the
8059 compute_delayed_physnames (cu
);
8060 do_cleanups (delayed_list_cleanup
);
8062 /* Some compilers don't define a DW_AT_high_pc attribute for the
8063 compilation unit. If the DW_AT_high_pc is missing, synthesize
8064 it, by scanning the DIE's below the compilation unit. */
8065 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
8067 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
8068 static_block
= end_symtab_get_static_block (addr
, 0, 1);
8070 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
8071 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
8072 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
8073 addrmap to help ensure it has an accurate map of pc values belonging to
8075 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
8077 cust
= end_symtab_from_static_block (static_block
,
8078 SECT_OFF_TEXT (objfile
), 0);
8082 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
8084 /* Set symtab language to language from DW_AT_language. If the
8085 compilation is from a C file generated by language preprocessors, do
8086 not set the language if it was already deduced by start_subfile. */
8087 if (!(cu
->language
== language_c
8088 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
8089 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8091 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
8092 produce DW_AT_location with location lists but it can be possibly
8093 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
8094 there were bugs in prologue debug info, fixed later in GCC-4.5
8095 by "unwind info for epilogues" patch (which is not directly related).
8097 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
8098 needed, it would be wrong due to missing DW_AT_producer there.
8100 Still one can confuse GDB by using non-standard GCC compilation
8101 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
8103 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
8104 cust
->locations_valid
= 1;
8106 if (gcc_4_minor
>= 5)
8107 cust
->epilogue_unwind_valid
= 1;
8109 cust
->call_site_htab
= cu
->call_site_htab
;
8112 if (dwarf2_per_objfile
->using_index
)
8113 per_cu
->v
.quick
->compunit_symtab
= cust
;
8116 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8117 pst
->compunit_symtab
= cust
;
8121 /* Push it for inclusion processing later. */
8122 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
8124 do_cleanups (back_to
);
8127 /* Generate full symbol information for type unit PER_CU, whose DIEs have
8128 already been loaded into memory. */
8131 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
8132 enum language pretend_language
)
8134 struct dwarf2_cu
*cu
= per_cu
->cu
;
8135 struct objfile
*objfile
= per_cu
->objfile
;
8136 struct compunit_symtab
*cust
;
8137 struct cleanup
*back_to
, *delayed_list_cleanup
;
8138 struct signatured_type
*sig_type
;
8140 gdb_assert (per_cu
->is_debug_types
);
8141 sig_type
= (struct signatured_type
*) per_cu
;
8144 back_to
= make_cleanup (really_free_pendings
, NULL
);
8145 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
8147 cu
->list_in_scope
= &file_symbols
;
8149 cu
->language
= pretend_language
;
8150 cu
->language_defn
= language_def (cu
->language
);
8152 /* The symbol tables are set up in read_type_unit_scope. */
8153 process_die (cu
->dies
, cu
);
8155 /* For now fudge the Go package. */
8156 if (cu
->language
== language_go
)
8157 fixup_go_packaging (cu
);
8159 /* Now that we have processed all the DIEs in the CU, all the types
8160 should be complete, and it should now be safe to compute all of the
8162 compute_delayed_physnames (cu
);
8163 do_cleanups (delayed_list_cleanup
);
8165 /* TUs share symbol tables.
8166 If this is the first TU to use this symtab, complete the construction
8167 of it with end_expandable_symtab. Otherwise, complete the addition of
8168 this TU's symbols to the existing symtab. */
8169 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
8171 cust
= end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
8172 sig_type
->type_unit_group
->compunit_symtab
= cust
;
8176 /* Set symtab language to language from DW_AT_language. If the
8177 compilation is from a C file generated by language preprocessors,
8178 do not set the language if it was already deduced by
8180 if (!(cu
->language
== language_c
8181 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
8182 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8187 augment_type_symtab ();
8188 cust
= sig_type
->type_unit_group
->compunit_symtab
;
8191 if (dwarf2_per_objfile
->using_index
)
8192 per_cu
->v
.quick
->compunit_symtab
= cust
;
8195 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8196 pst
->compunit_symtab
= cust
;
8200 do_cleanups (back_to
);
8203 /* Process an imported unit DIE. */
8206 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8208 struct attribute
*attr
;
8210 /* For now we don't handle imported units in type units. */
8211 if (cu
->per_cu
->is_debug_types
)
8213 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8214 " supported in type units [in module %s]"),
8215 objfile_name (cu
->objfile
));
8218 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8221 struct dwarf2_per_cu_data
*per_cu
;
8225 offset
= dwarf2_get_ref_die_offset (attr
);
8226 is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
8227 per_cu
= dwarf2_find_containing_comp_unit (offset
, is_dwz
, cu
->objfile
);
8229 /* If necessary, add it to the queue and load its DIEs. */
8230 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
8231 load_full_comp_unit (per_cu
, cu
->language
);
8233 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
8238 /* Reset the in_process bit of a die. */
8241 reset_die_in_process (void *arg
)
8243 struct die_info
*die
= (struct die_info
*) arg
;
8245 die
->in_process
= 0;
8248 /* Process a die and its children. */
8251 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8253 struct cleanup
*in_process
;
8255 /* We should only be processing those not already in process. */
8256 gdb_assert (!die
->in_process
);
8258 die
->in_process
= 1;
8259 in_process
= make_cleanup (reset_die_in_process
,die
);
8263 case DW_TAG_padding
:
8265 case DW_TAG_compile_unit
:
8266 case DW_TAG_partial_unit
:
8267 read_file_scope (die
, cu
);
8269 case DW_TAG_type_unit
:
8270 read_type_unit_scope (die
, cu
);
8272 case DW_TAG_subprogram
:
8273 case DW_TAG_inlined_subroutine
:
8274 read_func_scope (die
, cu
);
8276 case DW_TAG_lexical_block
:
8277 case DW_TAG_try_block
:
8278 case DW_TAG_catch_block
:
8279 read_lexical_block_scope (die
, cu
);
8281 case DW_TAG_GNU_call_site
:
8282 read_call_site_scope (die
, cu
);
8284 case DW_TAG_class_type
:
8285 case DW_TAG_interface_type
:
8286 case DW_TAG_structure_type
:
8287 case DW_TAG_union_type
:
8288 process_structure_scope (die
, cu
);
8290 case DW_TAG_enumeration_type
:
8291 process_enumeration_scope (die
, cu
);
8294 /* These dies have a type, but processing them does not create
8295 a symbol or recurse to process the children. Therefore we can
8296 read them on-demand through read_type_die. */
8297 case DW_TAG_subroutine_type
:
8298 case DW_TAG_set_type
:
8299 case DW_TAG_array_type
:
8300 case DW_TAG_pointer_type
:
8301 case DW_TAG_ptr_to_member_type
:
8302 case DW_TAG_reference_type
:
8303 case DW_TAG_string_type
:
8306 case DW_TAG_base_type
:
8307 case DW_TAG_subrange_type
:
8308 case DW_TAG_typedef
:
8309 /* Add a typedef symbol for the type definition, if it has a
8311 new_symbol (die
, read_type_die (die
, cu
), cu
);
8313 case DW_TAG_common_block
:
8314 read_common_block (die
, cu
);
8316 case DW_TAG_common_inclusion
:
8318 case DW_TAG_namespace
:
8319 cu
->processing_has_namespace_info
= 1;
8320 read_namespace (die
, cu
);
8323 cu
->processing_has_namespace_info
= 1;
8324 read_module (die
, cu
);
8326 case DW_TAG_imported_declaration
:
8327 cu
->processing_has_namespace_info
= 1;
8328 if (read_namespace_alias (die
, cu
))
8330 /* The declaration is not a global namespace alias: fall through. */
8331 case DW_TAG_imported_module
:
8332 cu
->processing_has_namespace_info
= 1;
8333 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
8334 || cu
->language
!= language_fortran
))
8335 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
8336 dwarf_tag_name (die
->tag
));
8337 read_import_statement (die
, cu
);
8340 case DW_TAG_imported_unit
:
8341 process_imported_unit_die (die
, cu
);
8345 new_symbol (die
, NULL
, cu
);
8349 do_cleanups (in_process
);
8352 /* DWARF name computation. */
8354 /* A helper function for dwarf2_compute_name which determines whether DIE
8355 needs to have the name of the scope prepended to the name listed in the
8359 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
8361 struct attribute
*attr
;
8365 case DW_TAG_namespace
:
8366 case DW_TAG_typedef
:
8367 case DW_TAG_class_type
:
8368 case DW_TAG_interface_type
:
8369 case DW_TAG_structure_type
:
8370 case DW_TAG_union_type
:
8371 case DW_TAG_enumeration_type
:
8372 case DW_TAG_enumerator
:
8373 case DW_TAG_subprogram
:
8374 case DW_TAG_inlined_subroutine
:
8376 case DW_TAG_imported_declaration
:
8379 case DW_TAG_variable
:
8380 case DW_TAG_constant
:
8381 /* We only need to prefix "globally" visible variables. These include
8382 any variable marked with DW_AT_external or any variable that
8383 lives in a namespace. [Variables in anonymous namespaces
8384 require prefixing, but they are not DW_AT_external.] */
8386 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
8388 struct dwarf2_cu
*spec_cu
= cu
;
8390 return die_needs_namespace (die_specification (die
, &spec_cu
),
8394 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
8395 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
8396 && die
->parent
->tag
!= DW_TAG_module
)
8398 /* A variable in a lexical block of some kind does not need a
8399 namespace, even though in C++ such variables may be external
8400 and have a mangled name. */
8401 if (die
->parent
->tag
== DW_TAG_lexical_block
8402 || die
->parent
->tag
== DW_TAG_try_block
8403 || die
->parent
->tag
== DW_TAG_catch_block
8404 || die
->parent
->tag
== DW_TAG_subprogram
)
8413 /* Retrieve the last character from a mem_file. */
8416 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
8418 char *last_char_p
= (char *) object
;
8421 *last_char_p
= buffer
[length
- 1];
8424 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
8425 compute the physname for the object, which include a method's:
8426 - formal parameters (C++),
8427 - receiver type (Go),
8429 The term "physname" is a bit confusing.
8430 For C++, for example, it is the demangled name.
8431 For Go, for example, it's the mangled name.
8433 For Ada, return the DIE's linkage name rather than the fully qualified
8434 name. PHYSNAME is ignored..
8436 The result is allocated on the objfile_obstack and canonicalized. */
8439 dwarf2_compute_name (const char *name
,
8440 struct die_info
*die
, struct dwarf2_cu
*cu
,
8443 struct objfile
*objfile
= cu
->objfile
;
8446 name
= dwarf2_name (die
, cu
);
8448 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
8449 but otherwise compute it by typename_concat inside GDB.
8450 FIXME: Actually this is not really true, or at least not always true.
8451 It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle
8452 Fortran names because there is no mangling standard. So new_symbol_full
8453 will set the demangled name to the result of dwarf2_full_name, and it is
8454 the demangled name that GDB uses if it exists. */
8455 if (cu
->language
== language_ada
8456 || (cu
->language
== language_fortran
&& physname
))
8458 /* For Ada unit, we prefer the linkage name over the name, as
8459 the former contains the exported name, which the user expects
8460 to be able to reference. Ideally, we want the user to be able
8461 to reference this entity using either natural or linkage name,
8462 but we haven't started looking at this enhancement yet. */
8463 const char *linkage_name
;
8465 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
8466 if (linkage_name
== NULL
)
8467 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8468 if (linkage_name
!= NULL
)
8469 return linkage_name
;
8472 /* These are the only languages we know how to qualify names in. */
8474 && (cu
->language
== language_cplus
8475 || cu
->language
== language_fortran
|| cu
->language
== language_d
8476 || cu
->language
== language_rust
))
8478 if (die_needs_namespace (die
, cu
))
8482 struct ui_file
*buf
;
8483 const char *canonical_name
= NULL
;
8485 prefix
= determine_prefix (die
, cu
);
8486 buf
= mem_fileopen ();
8487 if (*prefix
!= '\0')
8489 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
8492 fputs_unfiltered (prefixed_name
, buf
);
8493 xfree (prefixed_name
);
8496 fputs_unfiltered (name
, buf
);
8498 /* Template parameters may be specified in the DIE's DW_AT_name, or
8499 as children with DW_TAG_template_type_param or
8500 DW_TAG_value_type_param. If the latter, add them to the name
8501 here. If the name already has template parameters, then
8502 skip this step; some versions of GCC emit both, and
8503 it is more efficient to use the pre-computed name.
8505 Something to keep in mind about this process: it is very
8506 unlikely, or in some cases downright impossible, to produce
8507 something that will match the mangled name of a function.
8508 If the definition of the function has the same debug info,
8509 we should be able to match up with it anyway. But fallbacks
8510 using the minimal symbol, for instance to find a method
8511 implemented in a stripped copy of libstdc++, will not work.
8512 If we do not have debug info for the definition, we will have to
8513 match them up some other way.
8515 When we do name matching there is a related problem with function
8516 templates; two instantiated function templates are allowed to
8517 differ only by their return types, which we do not add here. */
8519 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
8521 struct attribute
*attr
;
8522 struct die_info
*child
;
8525 die
->building_fullname
= 1;
8527 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
8531 const gdb_byte
*bytes
;
8532 struct dwarf2_locexpr_baton
*baton
;
8535 if (child
->tag
!= DW_TAG_template_type_param
8536 && child
->tag
!= DW_TAG_template_value_param
)
8541 fputs_unfiltered ("<", buf
);
8545 fputs_unfiltered (", ", buf
);
8547 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
8550 complaint (&symfile_complaints
,
8551 _("template parameter missing DW_AT_type"));
8552 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
8555 type
= die_type (child
, cu
);
8557 if (child
->tag
== DW_TAG_template_type_param
)
8559 c_print_type (type
, "", buf
, -1, 0, &type_print_raw_options
);
8563 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
8566 complaint (&symfile_complaints
,
8567 _("template parameter missing "
8568 "DW_AT_const_value"));
8569 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
8573 dwarf2_const_value_attr (attr
, type
, name
,
8574 &cu
->comp_unit_obstack
, cu
,
8575 &value
, &bytes
, &baton
);
8577 if (TYPE_NOSIGN (type
))
8578 /* GDB prints characters as NUMBER 'CHAR'. If that's
8579 changed, this can use value_print instead. */
8580 c_printchar (value
, type
, buf
);
8583 struct value_print_options opts
;
8586 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
8590 else if (bytes
!= NULL
)
8592 v
= allocate_value (type
);
8593 memcpy (value_contents_writeable (v
), bytes
,
8594 TYPE_LENGTH (type
));
8597 v
= value_from_longest (type
, value
);
8599 /* Specify decimal so that we do not depend on
8601 get_formatted_print_options (&opts
, 'd');
8603 value_print (v
, buf
, &opts
);
8609 die
->building_fullname
= 0;
8613 /* Close the argument list, with a space if necessary
8614 (nested templates). */
8615 char last_char
= '\0';
8616 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
8617 if (last_char
== '>')
8618 fputs_unfiltered (" >", buf
);
8620 fputs_unfiltered (">", buf
);
8624 /* For C++ methods, append formal parameter type
8625 information, if PHYSNAME. */
8627 if (physname
&& die
->tag
== DW_TAG_subprogram
8628 && cu
->language
== language_cplus
)
8630 struct type
*type
= read_type_die (die
, cu
);
8632 c_type_print_args (type
, buf
, 1, cu
->language
,
8633 &type_print_raw_options
);
8635 if (cu
->language
== language_cplus
)
8637 /* Assume that an artificial first parameter is
8638 "this", but do not crash if it is not. RealView
8639 marks unnamed (and thus unused) parameters as
8640 artificial; there is no way to differentiate
8642 if (TYPE_NFIELDS (type
) > 0
8643 && TYPE_FIELD_ARTIFICIAL (type
, 0)
8644 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
8645 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
8647 fputs_unfiltered (" const", buf
);
8651 std::string intermediate_name
= ui_file_as_string (buf
);
8652 ui_file_delete (buf
);
8654 if (cu
->language
== language_cplus
)
8656 = dwarf2_canonicalize_name (intermediate_name
.c_str (), cu
,
8657 &objfile
->per_bfd
->storage_obstack
);
8659 /* If we only computed INTERMEDIATE_NAME, or if
8660 INTERMEDIATE_NAME is already canonical, then we need to
8661 copy it to the appropriate obstack. */
8662 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
.c_str ())
8663 name
= ((const char *)
8664 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8665 intermediate_name
.c_str (),
8666 intermediate_name
.length ()));
8668 name
= canonical_name
;
8675 /* Return the fully qualified name of DIE, based on its DW_AT_name.
8676 If scope qualifiers are appropriate they will be added. The result
8677 will be allocated on the storage_obstack, or NULL if the DIE does
8678 not have a name. NAME may either be from a previous call to
8679 dwarf2_name or NULL.
8681 The output string will be canonicalized (if C++). */
8684 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
8686 return dwarf2_compute_name (name
, die
, cu
, 0);
8689 /* Construct a physname for the given DIE in CU. NAME may either be
8690 from a previous call to dwarf2_name or NULL. The result will be
8691 allocated on the objfile_objstack or NULL if the DIE does not have a
8694 The output string will be canonicalized (if C++). */
8697 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
8699 struct objfile
*objfile
= cu
->objfile
;
8700 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
8701 struct cleanup
*back_to
;
8704 /* In this case dwarf2_compute_name is just a shortcut not building anything
8706 if (!die_needs_namespace (die
, cu
))
8707 return dwarf2_compute_name (name
, die
, cu
, 1);
8709 back_to
= make_cleanup (null_cleanup
, NULL
);
8711 mangled
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
8712 if (mangled
== NULL
)
8713 mangled
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8715 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
8716 See https://github.com/rust-lang/rust/issues/32925. */
8717 if (cu
->language
== language_rust
&& mangled
!= NULL
8718 && strchr (mangled
, '{') != NULL
)
8721 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
8723 if (mangled
!= NULL
)
8727 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
8728 type. It is easier for GDB users to search for such functions as
8729 `name(params)' than `long name(params)'. In such case the minimal
8730 symbol names do not match the full symbol names but for template
8731 functions there is never a need to look up their definition from their
8732 declaration so the only disadvantage remains the minimal symbol
8733 variant `long name(params)' does not have the proper inferior type.
8736 if (cu
->language
== language_go
)
8738 /* This is a lie, but we already lie to the caller new_symbol_full.
8739 new_symbol_full assumes we return the mangled name.
8740 This just undoes that lie until things are cleaned up. */
8745 demangled
= gdb_demangle (mangled
,
8746 (DMGL_PARAMS
| DMGL_ANSI
| DMGL_RET_DROP
));
8750 make_cleanup (xfree
, demangled
);
8760 if (canon
== NULL
|| check_physname
)
8762 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
8764 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
8766 /* It may not mean a bug in GDB. The compiler could also
8767 compute DW_AT_linkage_name incorrectly. But in such case
8768 GDB would need to be bug-to-bug compatible. */
8770 complaint (&symfile_complaints
,
8771 _("Computed physname <%s> does not match demangled <%s> "
8772 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
8773 physname
, canon
, mangled
, die
->offset
.sect_off
,
8774 objfile_name (objfile
));
8776 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
8777 is available here - over computed PHYSNAME. It is safer
8778 against both buggy GDB and buggy compilers. */
8792 retval
= ((const char *)
8793 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8794 retval
, strlen (retval
)));
8796 do_cleanups (back_to
);
8800 /* Inspect DIE in CU for a namespace alias. If one exists, record
8801 a new symbol for it.
8803 Returns 1 if a namespace alias was recorded, 0 otherwise. */
8806 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
8808 struct attribute
*attr
;
8810 /* If the die does not have a name, this is not a namespace
8812 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
8816 struct die_info
*d
= die
;
8817 struct dwarf2_cu
*imported_cu
= cu
;
8819 /* If the compiler has nested DW_AT_imported_declaration DIEs,
8820 keep inspecting DIEs until we hit the underlying import. */
8821 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
8822 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
8824 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
8828 d
= follow_die_ref (d
, attr
, &imported_cu
);
8829 if (d
->tag
!= DW_TAG_imported_declaration
)
8833 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
8835 complaint (&symfile_complaints
,
8836 _("DIE at 0x%x has too many recursively imported "
8837 "declarations"), d
->offset
.sect_off
);
8844 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
8846 type
= get_die_type_at_offset (offset
, cu
->per_cu
);
8847 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
8849 /* This declaration is a global namespace alias. Add
8850 a symbol for it whose type is the aliased namespace. */
8851 new_symbol (die
, type
, cu
);
8860 /* Return the using directives repository (global or local?) to use in the
8861 current context for LANGUAGE.
8863 For Ada, imported declarations can materialize renamings, which *may* be
8864 global. However it is impossible (for now?) in DWARF to distinguish
8865 "external" imported declarations and "static" ones. As all imported
8866 declarations seem to be static in all other languages, make them all CU-wide
8867 global only in Ada. */
8869 static struct using_direct
**
8870 using_directives (enum language language
)
8872 if (language
== language_ada
&& context_stack_depth
== 0)
8873 return &global_using_directives
;
8875 return &local_using_directives
;
8878 /* Read the import statement specified by the given die and record it. */
8881 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
8883 struct objfile
*objfile
= cu
->objfile
;
8884 struct attribute
*import_attr
;
8885 struct die_info
*imported_die
, *child_die
;
8886 struct dwarf2_cu
*imported_cu
;
8887 const char *imported_name
;
8888 const char *imported_name_prefix
;
8889 const char *canonical_name
;
8890 const char *import_alias
;
8891 const char *imported_declaration
= NULL
;
8892 const char *import_prefix
;
8893 VEC (const_char_ptr
) *excludes
= NULL
;
8894 struct cleanup
*cleanups
;
8896 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8897 if (import_attr
== NULL
)
8899 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
8900 dwarf_tag_name (die
->tag
));
8905 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
8906 imported_name
= dwarf2_name (imported_die
, imported_cu
);
8907 if (imported_name
== NULL
)
8909 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
8911 The import in the following code:
8925 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
8926 <52> DW_AT_decl_file : 1
8927 <53> DW_AT_decl_line : 6
8928 <54> DW_AT_import : <0x75>
8929 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
8931 <5b> DW_AT_decl_file : 1
8932 <5c> DW_AT_decl_line : 2
8933 <5d> DW_AT_type : <0x6e>
8935 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
8936 <76> DW_AT_byte_size : 4
8937 <77> DW_AT_encoding : 5 (signed)
8939 imports the wrong die ( 0x75 instead of 0x58 ).
8940 This case will be ignored until the gcc bug is fixed. */
8944 /* Figure out the local name after import. */
8945 import_alias
= dwarf2_name (die
, cu
);
8947 /* Figure out where the statement is being imported to. */
8948 import_prefix
= determine_prefix (die
, cu
);
8950 /* Figure out what the scope of the imported die is and prepend it
8951 to the name of the imported die. */
8952 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
8954 if (imported_die
->tag
!= DW_TAG_namespace
8955 && imported_die
->tag
!= DW_TAG_module
)
8957 imported_declaration
= imported_name
;
8958 canonical_name
= imported_name_prefix
;
8960 else if (strlen (imported_name_prefix
) > 0)
8961 canonical_name
= obconcat (&objfile
->objfile_obstack
,
8962 imported_name_prefix
,
8963 (cu
->language
== language_d
? "." : "::"),
8964 imported_name
, (char *) NULL
);
8966 canonical_name
= imported_name
;
8968 cleanups
= make_cleanup (VEC_cleanup (const_char_ptr
), &excludes
);
8970 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
8971 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
8972 child_die
= sibling_die (child_die
))
8974 /* DWARF-4: A Fortran use statement with a “rename list” may be
8975 represented by an imported module entry with an import attribute
8976 referring to the module and owned entries corresponding to those
8977 entities that are renamed as part of being imported. */
8979 if (child_die
->tag
!= DW_TAG_imported_declaration
)
8981 complaint (&symfile_complaints
,
8982 _("child DW_TAG_imported_declaration expected "
8983 "- DIE at 0x%x [in module %s]"),
8984 child_die
->offset
.sect_off
, objfile_name (objfile
));
8988 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
8989 if (import_attr
== NULL
)
8991 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
8992 dwarf_tag_name (child_die
->tag
));
8997 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
8999 imported_name
= dwarf2_name (imported_die
, imported_cu
);
9000 if (imported_name
== NULL
)
9002 complaint (&symfile_complaints
,
9003 _("child DW_TAG_imported_declaration has unknown "
9004 "imported name - DIE at 0x%x [in module %s]"),
9005 child_die
->offset
.sect_off
, objfile_name (objfile
));
9009 VEC_safe_push (const_char_ptr
, excludes
, imported_name
);
9011 process_die (child_die
, cu
);
9014 add_using_directive (using_directives (cu
->language
),
9018 imported_declaration
,
9021 &objfile
->objfile_obstack
);
9023 do_cleanups (cleanups
);
9026 /* Cleanup function for handle_DW_AT_stmt_list. */
9029 free_cu_line_header (void *arg
)
9031 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) arg
;
9033 free_line_header (cu
->line_header
);
9034 cu
->line_header
= NULL
;
9037 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
9038 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
9039 this, it was first present in GCC release 4.3.0. */
9042 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
9044 if (!cu
->checked_producer
)
9045 check_producer (cu
);
9047 return cu
->producer_is_gcc_lt_4_3
;
9051 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
9052 const char **name
, const char **comp_dir
)
9054 /* Find the filename. Do not use dwarf2_name here, since the filename
9055 is not a source language identifier. */
9056 *name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
9057 *comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
9059 if (*comp_dir
== NULL
9060 && producer_is_gcc_lt_4_3 (cu
) && *name
!= NULL
9061 && IS_ABSOLUTE_PATH (*name
))
9063 char *d
= ldirname (*name
);
9067 make_cleanup (xfree
, d
);
9069 if (*comp_dir
!= NULL
)
9071 /* Irix 6.2 native cc prepends <machine>.: to the compilation
9072 directory, get rid of it. */
9073 const char *cp
= strchr (*comp_dir
, ':');
9075 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
9080 *name
= "<unknown>";
9083 /* Handle DW_AT_stmt_list for a compilation unit.
9084 DIE is the DW_TAG_compile_unit die for CU.
9085 COMP_DIR is the compilation directory. LOWPC is passed to
9086 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
9089 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
9090 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
9092 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9093 struct attribute
*attr
;
9094 unsigned int line_offset
;
9095 struct line_header line_header_local
;
9096 hashval_t line_header_local_hash
;
9101 gdb_assert (! cu
->per_cu
->is_debug_types
);
9103 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9107 line_offset
= DW_UNSND (attr
);
9109 /* The line header hash table is only created if needed (it exists to
9110 prevent redundant reading of the line table for partial_units).
9111 If we're given a partial_unit, we'll need it. If we're given a
9112 compile_unit, then use the line header hash table if it's already
9113 created, but don't create one just yet. */
9115 if (dwarf2_per_objfile
->line_header_hash
== NULL
9116 && die
->tag
== DW_TAG_partial_unit
)
9118 dwarf2_per_objfile
->line_header_hash
9119 = htab_create_alloc_ex (127, line_header_hash_voidp
,
9120 line_header_eq_voidp
,
9121 free_line_header_voidp
,
9122 &objfile
->objfile_obstack
,
9123 hashtab_obstack_allocate
,
9124 dummy_obstack_deallocate
);
9127 line_header_local
.offset
.sect_off
= line_offset
;
9128 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
9129 line_header_local_hash
= line_header_hash (&line_header_local
);
9130 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
9132 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
9134 line_header_local_hash
, NO_INSERT
);
9136 /* For DW_TAG_compile_unit we need info like symtab::linetable which
9137 is not present in *SLOT (since if there is something in *SLOT then
9138 it will be for a partial_unit). */
9139 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
9141 gdb_assert (*slot
!= NULL
);
9142 cu
->line_header
= (struct line_header
*) *slot
;
9147 /* dwarf_decode_line_header does not yet provide sufficient information.
9148 We always have to call also dwarf_decode_lines for it. */
9149 cu
->line_header
= dwarf_decode_line_header (line_offset
, cu
);
9150 if (cu
->line_header
== NULL
)
9153 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
9157 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
9159 line_header_local_hash
, INSERT
);
9160 gdb_assert (slot
!= NULL
);
9162 if (slot
!= NULL
&& *slot
== NULL
)
9164 /* This newly decoded line number information unit will be owned
9165 by line_header_hash hash table. */
9166 *slot
= cu
->line_header
;
9170 /* We cannot free any current entry in (*slot) as that struct line_header
9171 may be already used by multiple CUs. Create only temporary decoded
9172 line_header for this CU - it may happen at most once for each line
9173 number information unit. And if we're not using line_header_hash
9174 then this is what we want as well. */
9175 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
9176 make_cleanup (free_cu_line_header
, cu
);
9178 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
9179 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
9183 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
9186 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9188 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9189 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9190 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
9191 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
9192 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
9193 struct attribute
*attr
;
9194 const char *name
= NULL
;
9195 const char *comp_dir
= NULL
;
9196 struct die_info
*child_die
;
9199 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9201 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
9203 /* If we didn't find a lowpc, set it to highpc to avoid complaints
9204 from finish_block. */
9205 if (lowpc
== ((CORE_ADDR
) -1))
9207 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
9209 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
9211 prepare_one_comp_unit (cu
, die
, cu
->language
);
9213 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
9214 standardised yet. As a workaround for the language detection we fall
9215 back to the DW_AT_producer string. */
9216 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
9217 cu
->language
= language_opencl
;
9219 /* Similar hack for Go. */
9220 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
9221 set_cu_language (DW_LANG_Go
, cu
);
9223 dwarf2_start_symtab (cu
, name
, comp_dir
, lowpc
);
9225 /* Decode line number information if present. We do this before
9226 processing child DIEs, so that the line header table is available
9227 for DW_AT_decl_file. */
9228 handle_DW_AT_stmt_list (die
, cu
, comp_dir
, lowpc
);
9230 /* Process all dies in compilation unit. */
9231 if (die
->child
!= NULL
)
9233 child_die
= die
->child
;
9234 while (child_die
&& child_die
->tag
)
9236 process_die (child_die
, cu
);
9237 child_die
= sibling_die (child_die
);
9241 /* Decode macro information, if present. Dwarf 2 macro information
9242 refers to information in the line number info statement program
9243 header, so we can only read it if we've read the header
9245 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
9246 if (attr
&& cu
->line_header
)
9248 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
9249 complaint (&symfile_complaints
,
9250 _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
9252 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
9256 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
9257 if (attr
&& cu
->line_header
)
9259 unsigned int macro_offset
= DW_UNSND (attr
);
9261 dwarf_decode_macros (cu
, macro_offset
, 0);
9265 do_cleanups (back_to
);
9268 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
9269 Create the set of symtabs used by this TU, or if this TU is sharing
9270 symtabs with another TU and the symtabs have already been created
9271 then restore those symtabs in the line header.
9272 We don't need the pc/line-number mapping for type units. */
9275 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
9277 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
9278 struct type_unit_group
*tu_group
;
9280 struct line_header
*lh
;
9281 struct attribute
*attr
;
9282 unsigned int i
, line_offset
;
9283 struct signatured_type
*sig_type
;
9285 gdb_assert (per_cu
->is_debug_types
);
9286 sig_type
= (struct signatured_type
*) per_cu
;
9288 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9290 /* If we're using .gdb_index (includes -readnow) then
9291 per_cu->type_unit_group may not have been set up yet. */
9292 if (sig_type
->type_unit_group
== NULL
)
9293 sig_type
->type_unit_group
= get_type_unit_group (cu
, attr
);
9294 tu_group
= sig_type
->type_unit_group
;
9296 /* If we've already processed this stmt_list there's no real need to
9297 do it again, we could fake it and just recreate the part we need
9298 (file name,index -> symtab mapping). If data shows this optimization
9299 is useful we can do it then. */
9300 first_time
= tu_group
->compunit_symtab
== NULL
;
9302 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
9307 line_offset
= DW_UNSND (attr
);
9308 lh
= dwarf_decode_line_header (line_offset
, cu
);
9313 dwarf2_start_symtab (cu
, "", NULL
, 0);
9316 gdb_assert (tu_group
->symtabs
== NULL
);
9317 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9322 cu
->line_header
= lh
;
9323 make_cleanup (free_cu_line_header
, cu
);
9327 struct compunit_symtab
*cust
= dwarf2_start_symtab (cu
, "", NULL
, 0);
9329 /* Note: We don't assign tu_group->compunit_symtab yet because we're
9330 still initializing it, and our caller (a few levels up)
9331 process_full_type_unit still needs to know if this is the first
9334 tu_group
->num_symtabs
= lh
->num_file_names
;
9335 tu_group
->symtabs
= XNEWVEC (struct symtab
*, lh
->num_file_names
);
9337 for (i
= 0; i
< lh
->num_file_names
; ++i
)
9339 const char *dir
= NULL
;
9340 struct file_entry
*fe
= &lh
->file_names
[i
];
9342 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
9343 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
9344 dwarf2_start_subfile (fe
->name
, dir
);
9346 if (current_subfile
->symtab
== NULL
)
9348 /* NOTE: start_subfile will recognize when it's been passed
9349 a file it has already seen. So we can't assume there's a
9350 simple mapping from lh->file_names to subfiles, plus
9351 lh->file_names may contain dups. */
9352 current_subfile
->symtab
9353 = allocate_symtab (cust
, current_subfile
->name
);
9356 fe
->symtab
= current_subfile
->symtab
;
9357 tu_group
->symtabs
[i
] = fe
->symtab
;
9362 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9364 for (i
= 0; i
< lh
->num_file_names
; ++i
)
9366 struct file_entry
*fe
= &lh
->file_names
[i
];
9368 fe
->symtab
= tu_group
->symtabs
[i
];
9372 /* The main symtab is allocated last. Type units don't have DW_AT_name
9373 so they don't have a "real" (so to speak) symtab anyway.
9374 There is later code that will assign the main symtab to all symbols
9375 that don't have one. We need to handle the case of a symbol with a
9376 missing symtab (DW_AT_decl_file) anyway. */
9379 /* Process DW_TAG_type_unit.
9380 For TUs we want to skip the first top level sibling if it's not the
9381 actual type being defined by this TU. In this case the first top
9382 level sibling is there to provide context only. */
9385 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9387 struct die_info
*child_die
;
9389 prepare_one_comp_unit (cu
, die
, language_minimal
);
9391 /* Initialize (or reinitialize) the machinery for building symtabs.
9392 We do this before processing child DIEs, so that the line header table
9393 is available for DW_AT_decl_file. */
9394 setup_type_unit_groups (die
, cu
);
9396 if (die
->child
!= NULL
)
9398 child_die
= die
->child
;
9399 while (child_die
&& child_die
->tag
)
9401 process_die (child_die
, cu
);
9402 child_die
= sibling_die (child_die
);
9409 http://gcc.gnu.org/wiki/DebugFission
9410 http://gcc.gnu.org/wiki/DebugFissionDWP
9412 To simplify handling of both DWO files ("object" files with the DWARF info)
9413 and DWP files (a file with the DWOs packaged up into one file), we treat
9414 DWP files as having a collection of virtual DWO files. */
9417 hash_dwo_file (const void *item
)
9419 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
9422 hash
= htab_hash_string (dwo_file
->dwo_name
);
9423 if (dwo_file
->comp_dir
!= NULL
)
9424 hash
+= htab_hash_string (dwo_file
->comp_dir
);
9429 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
9431 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
9432 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
9434 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
9436 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
9437 return lhs
->comp_dir
== rhs
->comp_dir
;
9438 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
9441 /* Allocate a hash table for DWO files. */
9444 allocate_dwo_file_hash_table (void)
9446 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9448 return htab_create_alloc_ex (41,
9452 &objfile
->objfile_obstack
,
9453 hashtab_obstack_allocate
,
9454 dummy_obstack_deallocate
);
9457 /* Lookup DWO file DWO_NAME. */
9460 lookup_dwo_file_slot (const char *dwo_name
, const char *comp_dir
)
9462 struct dwo_file find_entry
;
9465 if (dwarf2_per_objfile
->dwo_files
== NULL
)
9466 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
9468 memset (&find_entry
, 0, sizeof (find_entry
));
9469 find_entry
.dwo_name
= dwo_name
;
9470 find_entry
.comp_dir
= comp_dir
;
9471 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
9477 hash_dwo_unit (const void *item
)
9479 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
9481 /* This drops the top 32 bits of the id, but is ok for a hash. */
9482 return dwo_unit
->signature
;
9486 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
9488 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
9489 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
9491 /* The signature is assumed to be unique within the DWO file.
9492 So while object file CU dwo_id's always have the value zero,
9493 that's OK, assuming each object file DWO file has only one CU,
9494 and that's the rule for now. */
9495 return lhs
->signature
== rhs
->signature
;
9498 /* Allocate a hash table for DWO CUs,TUs.
9499 There is one of these tables for each of CUs,TUs for each DWO file. */
9502 allocate_dwo_unit_table (struct objfile
*objfile
)
9504 /* Start out with a pretty small number.
9505 Generally DWO files contain only one CU and maybe some TUs. */
9506 return htab_create_alloc_ex (3,
9510 &objfile
->objfile_obstack
,
9511 hashtab_obstack_allocate
,
9512 dummy_obstack_deallocate
);
9515 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
9517 struct create_dwo_cu_data
9519 struct dwo_file
*dwo_file
;
9520 struct dwo_unit dwo_unit
;
9523 /* die_reader_func for create_dwo_cu. */
9526 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
9527 const gdb_byte
*info_ptr
,
9528 struct die_info
*comp_unit_die
,
9532 struct dwarf2_cu
*cu
= reader
->cu
;
9533 sect_offset offset
= cu
->per_cu
->offset
;
9534 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
9535 struct create_dwo_cu_data
*data
= (struct create_dwo_cu_data
*) datap
;
9536 struct dwo_file
*dwo_file
= data
->dwo_file
;
9537 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
9538 struct attribute
*attr
;
9540 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
9543 complaint (&symfile_complaints
,
9544 _("Dwarf Error: debug entry at offset 0x%x is missing"
9545 " its dwo_id [in module %s]"),
9546 offset
.sect_off
, dwo_file
->dwo_name
);
9550 dwo_unit
->dwo_file
= dwo_file
;
9551 dwo_unit
->signature
= DW_UNSND (attr
);
9552 dwo_unit
->section
= section
;
9553 dwo_unit
->offset
= offset
;
9554 dwo_unit
->length
= cu
->per_cu
->length
;
9556 if (dwarf_read_debug
)
9557 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, dwo_id %s\n",
9558 offset
.sect_off
, hex_string (dwo_unit
->signature
));
9561 /* Create the dwo_unit for the lone CU in DWO_FILE.
9562 Note: This function processes DWO files only, not DWP files. */
9564 static struct dwo_unit
*
9565 create_dwo_cu (struct dwo_file
*dwo_file
)
9567 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9568 struct dwarf2_section_info
*section
= &dwo_file
->sections
.info
;
9569 const gdb_byte
*info_ptr
, *end_ptr
;
9570 struct create_dwo_cu_data create_dwo_cu_data
;
9571 struct dwo_unit
*dwo_unit
;
9573 dwarf2_read_section (objfile
, section
);
9574 info_ptr
= section
->buffer
;
9576 if (info_ptr
== NULL
)
9579 if (dwarf_read_debug
)
9581 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
9582 get_section_name (section
),
9583 get_section_file_name (section
));
9586 create_dwo_cu_data
.dwo_file
= dwo_file
;
9589 end_ptr
= info_ptr
+ section
->size
;
9590 while (info_ptr
< end_ptr
)
9592 struct dwarf2_per_cu_data per_cu
;
9594 memset (&create_dwo_cu_data
.dwo_unit
, 0,
9595 sizeof (create_dwo_cu_data
.dwo_unit
));
9596 memset (&per_cu
, 0, sizeof (per_cu
));
9597 per_cu
.objfile
= objfile
;
9598 per_cu
.is_debug_types
= 0;
9599 per_cu
.offset
.sect_off
= info_ptr
- section
->buffer
;
9600 per_cu
.section
= section
;
9602 init_cutu_and_read_dies_no_follow (&per_cu
, dwo_file
,
9603 create_dwo_cu_reader
,
9604 &create_dwo_cu_data
);
9606 if (create_dwo_cu_data
.dwo_unit
.dwo_file
!= NULL
)
9608 /* If we've already found one, complain. We only support one
9609 because having more than one requires hacking the dwo_name of
9610 each to match, which is highly unlikely to happen. */
9611 if (dwo_unit
!= NULL
)
9613 complaint (&symfile_complaints
,
9614 _("Multiple CUs in DWO file %s [in module %s]"),
9615 dwo_file
->dwo_name
, objfile_name (objfile
));
9619 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
9620 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
9623 info_ptr
+= per_cu
.length
;
9629 /* DWP file .debug_{cu,tu}_index section format:
9630 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
9634 Both index sections have the same format, and serve to map a 64-bit
9635 signature to a set of section numbers. Each section begins with a header,
9636 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
9637 indexes, and a pool of 32-bit section numbers. The index sections will be
9638 aligned at 8-byte boundaries in the file.
9640 The index section header consists of:
9642 V, 32 bit version number
9644 N, 32 bit number of compilation units or type units in the index
9645 M, 32 bit number of slots in the hash table
9647 Numbers are recorded using the byte order of the application binary.
9649 The hash table begins at offset 16 in the section, and consists of an array
9650 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
9651 order of the application binary). Unused slots in the hash table are 0.
9652 (We rely on the extreme unlikeliness of a signature being exactly 0.)
9654 The parallel table begins immediately after the hash table
9655 (at offset 16 + 8 * M from the beginning of the section), and consists of an
9656 array of 32-bit indexes (using the byte order of the application binary),
9657 corresponding 1-1 with slots in the hash table. Each entry in the parallel
9658 table contains a 32-bit index into the pool of section numbers. For unused
9659 hash table slots, the corresponding entry in the parallel table will be 0.
9661 The pool of section numbers begins immediately following the hash table
9662 (at offset 16 + 12 * M from the beginning of the section). The pool of
9663 section numbers consists of an array of 32-bit words (using the byte order
9664 of the application binary). Each item in the array is indexed starting
9665 from 0. The hash table entry provides the index of the first section
9666 number in the set. Additional section numbers in the set follow, and the
9667 set is terminated by a 0 entry (section number 0 is not used in ELF).
9669 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
9670 section must be the first entry in the set, and the .debug_abbrev.dwo must
9671 be the second entry. Other members of the set may follow in any order.
9677 DWP Version 2 combines all the .debug_info, etc. sections into one,
9678 and the entries in the index tables are now offsets into these sections.
9679 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
9682 Index Section Contents:
9684 Hash Table of Signatures dwp_hash_table.hash_table
9685 Parallel Table of Indices dwp_hash_table.unit_table
9686 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
9687 Table of Section Sizes dwp_hash_table.v2.sizes
9689 The index section header consists of:
9691 V, 32 bit version number
9692 L, 32 bit number of columns in the table of section offsets
9693 N, 32 bit number of compilation units or type units in the index
9694 M, 32 bit number of slots in the hash table
9696 Numbers are recorded using the byte order of the application binary.
9698 The hash table has the same format as version 1.
9699 The parallel table of indices has the same format as version 1,
9700 except that the entries are origin-1 indices into the table of sections
9701 offsets and the table of section sizes.
9703 The table of offsets begins immediately following the parallel table
9704 (at offset 16 + 12 * M from the beginning of the section). The table is
9705 a two-dimensional array of 32-bit words (using the byte order of the
9706 application binary), with L columns and N+1 rows, in row-major order.
9707 Each row in the array is indexed starting from 0. The first row provides
9708 a key to the remaining rows: each column in this row provides an identifier
9709 for a debug section, and the offsets in the same column of subsequent rows
9710 refer to that section. The section identifiers are:
9712 DW_SECT_INFO 1 .debug_info.dwo
9713 DW_SECT_TYPES 2 .debug_types.dwo
9714 DW_SECT_ABBREV 3 .debug_abbrev.dwo
9715 DW_SECT_LINE 4 .debug_line.dwo
9716 DW_SECT_LOC 5 .debug_loc.dwo
9717 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
9718 DW_SECT_MACINFO 7 .debug_macinfo.dwo
9719 DW_SECT_MACRO 8 .debug_macro.dwo
9721 The offsets provided by the CU and TU index sections are the base offsets
9722 for the contributions made by each CU or TU to the corresponding section
9723 in the package file. Each CU and TU header contains an abbrev_offset
9724 field, used to find the abbreviations table for that CU or TU within the
9725 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
9726 be interpreted as relative to the base offset given in the index section.
9727 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
9728 should be interpreted as relative to the base offset for .debug_line.dwo,
9729 and offsets into other debug sections obtained from DWARF attributes should
9730 also be interpreted as relative to the corresponding base offset.
9732 The table of sizes begins immediately following the table of offsets.
9733 Like the table of offsets, it is a two-dimensional array of 32-bit words,
9734 with L columns and N rows, in row-major order. Each row in the array is
9735 indexed starting from 1 (row 0 is shared by the two tables).
9739 Hash table lookup is handled the same in version 1 and 2:
9741 We assume that N and M will not exceed 2^32 - 1.
9742 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
9744 Given a 64-bit compilation unit signature or a type signature S, an entry
9745 in the hash table is located as follows:
9747 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
9748 the low-order k bits all set to 1.
9750 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
9752 3) If the hash table entry at index H matches the signature, use that
9753 entry. If the hash table entry at index H is unused (all zeroes),
9754 terminate the search: the signature is not present in the table.
9756 4) Let H = (H + H') modulo M. Repeat at Step 3.
9758 Because M > N and H' and M are relatively prime, the search is guaranteed
9759 to stop at an unused slot or find the match. */
9761 /* Create a hash table to map DWO IDs to their CU/TU entry in
9762 .debug_{info,types}.dwo in DWP_FILE.
9763 Returns NULL if there isn't one.
9764 Note: This function processes DWP files only, not DWO files. */
9766 static struct dwp_hash_table
*
9767 create_dwp_hash_table (struct dwp_file
*dwp_file
, int is_debug_types
)
9769 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9770 bfd
*dbfd
= dwp_file
->dbfd
;
9771 const gdb_byte
*index_ptr
, *index_end
;
9772 struct dwarf2_section_info
*index
;
9773 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
9774 struct dwp_hash_table
*htab
;
9777 index
= &dwp_file
->sections
.tu_index
;
9779 index
= &dwp_file
->sections
.cu_index
;
9781 if (dwarf2_section_empty_p (index
))
9783 dwarf2_read_section (objfile
, index
);
9785 index_ptr
= index
->buffer
;
9786 index_end
= index_ptr
+ index
->size
;
9788 version
= read_4_bytes (dbfd
, index_ptr
);
9791 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
9795 nr_units
= read_4_bytes (dbfd
, index_ptr
);
9797 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
9800 if (version
!= 1 && version
!= 2)
9802 error (_("Dwarf Error: unsupported DWP file version (%s)"
9804 pulongest (version
), dwp_file
->name
);
9806 if (nr_slots
!= (nr_slots
& -nr_slots
))
9808 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
9809 " is not power of 2 [in module %s]"),
9810 pulongest (nr_slots
), dwp_file
->name
);
9813 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
9814 htab
->version
= version
;
9815 htab
->nr_columns
= nr_columns
;
9816 htab
->nr_units
= nr_units
;
9817 htab
->nr_slots
= nr_slots
;
9818 htab
->hash_table
= index_ptr
;
9819 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
9821 /* Exit early if the table is empty. */
9822 if (nr_slots
== 0 || nr_units
== 0
9823 || (version
== 2 && nr_columns
== 0))
9825 /* All must be zero. */
9826 if (nr_slots
!= 0 || nr_units
!= 0
9827 || (version
== 2 && nr_columns
!= 0))
9829 complaint (&symfile_complaints
,
9830 _("Empty DWP but nr_slots,nr_units,nr_columns not"
9831 " all zero [in modules %s]"),
9839 htab
->section_pool
.v1
.indices
=
9840 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
9841 /* It's harder to decide whether the section is too small in v1.
9842 V1 is deprecated anyway so we punt. */
9846 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
9847 int *ids
= htab
->section_pool
.v2
.section_ids
;
9848 /* Reverse map for error checking. */
9849 int ids_seen
[DW_SECT_MAX
+ 1];
9854 error (_("Dwarf Error: bad DWP hash table, too few columns"
9855 " in section table [in module %s]"),
9858 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
9860 error (_("Dwarf Error: bad DWP hash table, too many columns"
9861 " in section table [in module %s]"),
9864 memset (ids
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
9865 memset (ids_seen
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
9866 for (i
= 0; i
< nr_columns
; ++i
)
9868 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
9870 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
9872 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
9873 " in section table [in module %s]"),
9874 id
, dwp_file
->name
);
9876 if (ids_seen
[id
] != -1)
9878 error (_("Dwarf Error: bad DWP hash table, duplicate section"
9879 " id %d in section table [in module %s]"),
9880 id
, dwp_file
->name
);
9885 /* Must have exactly one info or types section. */
9886 if (((ids_seen
[DW_SECT_INFO
] != -1)
9887 + (ids_seen
[DW_SECT_TYPES
] != -1))
9890 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
9891 " DWO info/types section [in module %s]"),
9894 /* Must have an abbrev section. */
9895 if (ids_seen
[DW_SECT_ABBREV
] == -1)
9897 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
9898 " section [in module %s]"),
9901 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
9902 htab
->section_pool
.v2
.sizes
=
9903 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
9904 * nr_units
* nr_columns
);
9905 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
9906 * nr_units
* nr_columns
))
9909 error (_("Dwarf Error: DWP index section is corrupt (too small)"
9918 /* Update SECTIONS with the data from SECTP.
9920 This function is like the other "locate" section routines that are
9921 passed to bfd_map_over_sections, but in this context the sections to
9922 read comes from the DWP V1 hash table, not the full ELF section table.
9924 The result is non-zero for success, or zero if an error was found. */
9927 locate_v1_virtual_dwo_sections (asection
*sectp
,
9928 struct virtual_v1_dwo_sections
*sections
)
9930 const struct dwop_section_names
*names
= &dwop_section_names
;
9932 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
9934 /* There can be only one. */
9935 if (sections
->abbrev
.s
.section
!= NULL
)
9937 sections
->abbrev
.s
.section
= sectp
;
9938 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
9940 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
9941 || section_is_p (sectp
->name
, &names
->types_dwo
))
9943 /* There can be only one. */
9944 if (sections
->info_or_types
.s
.section
!= NULL
)
9946 sections
->info_or_types
.s
.section
= sectp
;
9947 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
9949 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
9951 /* There can be only one. */
9952 if (sections
->line
.s
.section
!= NULL
)
9954 sections
->line
.s
.section
= sectp
;
9955 sections
->line
.size
= bfd_get_section_size (sectp
);
9957 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
9959 /* There can be only one. */
9960 if (sections
->loc
.s
.section
!= NULL
)
9962 sections
->loc
.s
.section
= sectp
;
9963 sections
->loc
.size
= bfd_get_section_size (sectp
);
9965 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
9967 /* There can be only one. */
9968 if (sections
->macinfo
.s
.section
!= NULL
)
9970 sections
->macinfo
.s
.section
= sectp
;
9971 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
9973 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
9975 /* There can be only one. */
9976 if (sections
->macro
.s
.section
!= NULL
)
9978 sections
->macro
.s
.section
= sectp
;
9979 sections
->macro
.size
= bfd_get_section_size (sectp
);
9981 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
9983 /* There can be only one. */
9984 if (sections
->str_offsets
.s
.section
!= NULL
)
9986 sections
->str_offsets
.s
.section
= sectp
;
9987 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
9991 /* No other kind of section is valid. */
9998 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
9999 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
10000 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
10001 This is for DWP version 1 files. */
10003 static struct dwo_unit
*
10004 create_dwo_unit_in_dwp_v1 (struct dwp_file
*dwp_file
,
10005 uint32_t unit_index
,
10006 const char *comp_dir
,
10007 ULONGEST signature
, int is_debug_types
)
10009 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10010 const struct dwp_hash_table
*dwp_htab
=
10011 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10012 bfd
*dbfd
= dwp_file
->dbfd
;
10013 const char *kind
= is_debug_types
? "TU" : "CU";
10014 struct dwo_file
*dwo_file
;
10015 struct dwo_unit
*dwo_unit
;
10016 struct virtual_v1_dwo_sections sections
;
10017 void **dwo_file_slot
;
10018 char *virtual_dwo_name
;
10019 struct cleanup
*cleanups
;
10022 gdb_assert (dwp_file
->version
== 1);
10024 if (dwarf_read_debug
)
10026 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
10028 pulongest (unit_index
), hex_string (signature
),
10032 /* Fetch the sections of this DWO unit.
10033 Put a limit on the number of sections we look for so that bad data
10034 doesn't cause us to loop forever. */
10036 #define MAX_NR_V1_DWO_SECTIONS \
10037 (1 /* .debug_info or .debug_types */ \
10038 + 1 /* .debug_abbrev */ \
10039 + 1 /* .debug_line */ \
10040 + 1 /* .debug_loc */ \
10041 + 1 /* .debug_str_offsets */ \
10042 + 1 /* .debug_macro or .debug_macinfo */ \
10043 + 1 /* trailing zero */)
10045 memset (§ions
, 0, sizeof (sections
));
10046 cleanups
= make_cleanup (null_cleanup
, 0);
10048 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
10051 uint32_t section_nr
=
10052 read_4_bytes (dbfd
,
10053 dwp_htab
->section_pool
.v1
.indices
10054 + (unit_index
+ i
) * sizeof (uint32_t));
10056 if (section_nr
== 0)
10058 if (section_nr
>= dwp_file
->num_sections
)
10060 error (_("Dwarf Error: bad DWP hash table, section number too large"
10061 " [in module %s]"),
10065 sectp
= dwp_file
->elf_sections
[section_nr
];
10066 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
10068 error (_("Dwarf Error: bad DWP hash table, invalid section found"
10069 " [in module %s]"),
10075 || dwarf2_section_empty_p (§ions
.info_or_types
)
10076 || dwarf2_section_empty_p (§ions
.abbrev
))
10078 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
10079 " [in module %s]"),
10082 if (i
== MAX_NR_V1_DWO_SECTIONS
)
10084 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
10085 " [in module %s]"),
10089 /* It's easier for the rest of the code if we fake a struct dwo_file and
10090 have dwo_unit "live" in that. At least for now.
10092 The DWP file can be made up of a random collection of CUs and TUs.
10093 However, for each CU + set of TUs that came from the same original DWO
10094 file, we can combine them back into a virtual DWO file to save space
10095 (fewer struct dwo_file objects to allocate). Remember that for really
10096 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10099 xstrprintf ("virtual-dwo/%d-%d-%d-%d",
10100 get_section_id (§ions
.abbrev
),
10101 get_section_id (§ions
.line
),
10102 get_section_id (§ions
.loc
),
10103 get_section_id (§ions
.str_offsets
));
10104 make_cleanup (xfree
, virtual_dwo_name
);
10105 /* Can we use an existing virtual DWO file? */
10106 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
10107 /* Create one if necessary. */
10108 if (*dwo_file_slot
== NULL
)
10110 if (dwarf_read_debug
)
10112 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
10115 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10117 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
10119 strlen (virtual_dwo_name
));
10120 dwo_file
->comp_dir
= comp_dir
;
10121 dwo_file
->sections
.abbrev
= sections
.abbrev
;
10122 dwo_file
->sections
.line
= sections
.line
;
10123 dwo_file
->sections
.loc
= sections
.loc
;
10124 dwo_file
->sections
.macinfo
= sections
.macinfo
;
10125 dwo_file
->sections
.macro
= sections
.macro
;
10126 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
10127 /* The "str" section is global to the entire DWP file. */
10128 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10129 /* The info or types section is assigned below to dwo_unit,
10130 there's no need to record it in dwo_file.
10131 Also, we can't simply record type sections in dwo_file because
10132 we record a pointer into the vector in dwo_unit. As we collect more
10133 types we'll grow the vector and eventually have to reallocate space
10134 for it, invalidating all copies of pointers into the previous
10136 *dwo_file_slot
= dwo_file
;
10140 if (dwarf_read_debug
)
10142 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10145 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
10147 do_cleanups (cleanups
);
10149 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10150 dwo_unit
->dwo_file
= dwo_file
;
10151 dwo_unit
->signature
= signature
;
10152 dwo_unit
->section
=
10153 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
10154 *dwo_unit
->section
= sections
.info_or_types
;
10155 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10160 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
10161 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
10162 piece within that section used by a TU/CU, return a virtual section
10163 of just that piece. */
10165 static struct dwarf2_section_info
10166 create_dwp_v2_section (struct dwarf2_section_info
*section
,
10167 bfd_size_type offset
, bfd_size_type size
)
10169 struct dwarf2_section_info result
;
10172 gdb_assert (section
!= NULL
);
10173 gdb_assert (!section
->is_virtual
);
10175 memset (&result
, 0, sizeof (result
));
10176 result
.s
.containing_section
= section
;
10177 result
.is_virtual
= 1;
10182 sectp
= get_section_bfd_section (section
);
10184 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
10185 bounds of the real section. This is a pretty-rare event, so just
10186 flag an error (easier) instead of a warning and trying to cope. */
10188 || offset
+ size
> bfd_get_section_size (sectp
))
10190 bfd
*abfd
= sectp
->owner
;
10192 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
10193 " in section %s [in module %s]"),
10194 sectp
? bfd_section_name (abfd
, sectp
) : "<unknown>",
10195 objfile_name (dwarf2_per_objfile
->objfile
));
10198 result
.virtual_offset
= offset
;
10199 result
.size
= size
;
10203 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
10204 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
10205 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
10206 This is for DWP version 2 files. */
10208 static struct dwo_unit
*
10209 create_dwo_unit_in_dwp_v2 (struct dwp_file
*dwp_file
,
10210 uint32_t unit_index
,
10211 const char *comp_dir
,
10212 ULONGEST signature
, int is_debug_types
)
10214 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10215 const struct dwp_hash_table
*dwp_htab
=
10216 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10217 bfd
*dbfd
= dwp_file
->dbfd
;
10218 const char *kind
= is_debug_types
? "TU" : "CU";
10219 struct dwo_file
*dwo_file
;
10220 struct dwo_unit
*dwo_unit
;
10221 struct virtual_v2_dwo_sections sections
;
10222 void **dwo_file_slot
;
10223 char *virtual_dwo_name
;
10224 struct cleanup
*cleanups
;
10227 gdb_assert (dwp_file
->version
== 2);
10229 if (dwarf_read_debug
)
10231 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
10233 pulongest (unit_index
), hex_string (signature
),
10237 /* Fetch the section offsets of this DWO unit. */
10239 memset (§ions
, 0, sizeof (sections
));
10240 cleanups
= make_cleanup (null_cleanup
, 0);
10242 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
10244 uint32_t offset
= read_4_bytes (dbfd
,
10245 dwp_htab
->section_pool
.v2
.offsets
10246 + (((unit_index
- 1) * dwp_htab
->nr_columns
10248 * sizeof (uint32_t)));
10249 uint32_t size
= read_4_bytes (dbfd
,
10250 dwp_htab
->section_pool
.v2
.sizes
10251 + (((unit_index
- 1) * dwp_htab
->nr_columns
10253 * sizeof (uint32_t)));
10255 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
10258 case DW_SECT_TYPES
:
10259 sections
.info_or_types_offset
= offset
;
10260 sections
.info_or_types_size
= size
;
10262 case DW_SECT_ABBREV
:
10263 sections
.abbrev_offset
= offset
;
10264 sections
.abbrev_size
= size
;
10267 sections
.line_offset
= offset
;
10268 sections
.line_size
= size
;
10271 sections
.loc_offset
= offset
;
10272 sections
.loc_size
= size
;
10274 case DW_SECT_STR_OFFSETS
:
10275 sections
.str_offsets_offset
= offset
;
10276 sections
.str_offsets_size
= size
;
10278 case DW_SECT_MACINFO
:
10279 sections
.macinfo_offset
= offset
;
10280 sections
.macinfo_size
= size
;
10282 case DW_SECT_MACRO
:
10283 sections
.macro_offset
= offset
;
10284 sections
.macro_size
= size
;
10289 /* It's easier for the rest of the code if we fake a struct dwo_file and
10290 have dwo_unit "live" in that. At least for now.
10292 The DWP file can be made up of a random collection of CUs and TUs.
10293 However, for each CU + set of TUs that came from the same original DWO
10294 file, we can combine them back into a virtual DWO file to save space
10295 (fewer struct dwo_file objects to allocate). Remember that for really
10296 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10299 xstrprintf ("virtual-dwo/%ld-%ld-%ld-%ld",
10300 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
10301 (long) (sections
.line_size
? sections
.line_offset
: 0),
10302 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
10303 (long) (sections
.str_offsets_size
10304 ? sections
.str_offsets_offset
: 0));
10305 make_cleanup (xfree
, virtual_dwo_name
);
10306 /* Can we use an existing virtual DWO file? */
10307 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
10308 /* Create one if necessary. */
10309 if (*dwo_file_slot
== NULL
)
10311 if (dwarf_read_debug
)
10313 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
10316 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10318 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
10320 strlen (virtual_dwo_name
));
10321 dwo_file
->comp_dir
= comp_dir
;
10322 dwo_file
->sections
.abbrev
=
10323 create_dwp_v2_section (&dwp_file
->sections
.abbrev
,
10324 sections
.abbrev_offset
, sections
.abbrev_size
);
10325 dwo_file
->sections
.line
=
10326 create_dwp_v2_section (&dwp_file
->sections
.line
,
10327 sections
.line_offset
, sections
.line_size
);
10328 dwo_file
->sections
.loc
=
10329 create_dwp_v2_section (&dwp_file
->sections
.loc
,
10330 sections
.loc_offset
, sections
.loc_size
);
10331 dwo_file
->sections
.macinfo
=
10332 create_dwp_v2_section (&dwp_file
->sections
.macinfo
,
10333 sections
.macinfo_offset
, sections
.macinfo_size
);
10334 dwo_file
->sections
.macro
=
10335 create_dwp_v2_section (&dwp_file
->sections
.macro
,
10336 sections
.macro_offset
, sections
.macro_size
);
10337 dwo_file
->sections
.str_offsets
=
10338 create_dwp_v2_section (&dwp_file
->sections
.str_offsets
,
10339 sections
.str_offsets_offset
,
10340 sections
.str_offsets_size
);
10341 /* The "str" section is global to the entire DWP file. */
10342 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10343 /* The info or types section is assigned below to dwo_unit,
10344 there's no need to record it in dwo_file.
10345 Also, we can't simply record type sections in dwo_file because
10346 we record a pointer into the vector in dwo_unit. As we collect more
10347 types we'll grow the vector and eventually have to reallocate space
10348 for it, invalidating all copies of pointers into the previous
10350 *dwo_file_slot
= dwo_file
;
10354 if (dwarf_read_debug
)
10356 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10359 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
10361 do_cleanups (cleanups
);
10363 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10364 dwo_unit
->dwo_file
= dwo_file
;
10365 dwo_unit
->signature
= signature
;
10366 dwo_unit
->section
=
10367 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
10368 *dwo_unit
->section
= create_dwp_v2_section (is_debug_types
10369 ? &dwp_file
->sections
.types
10370 : &dwp_file
->sections
.info
,
10371 sections
.info_or_types_offset
,
10372 sections
.info_or_types_size
);
10373 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10378 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
10379 Returns NULL if the signature isn't found. */
10381 static struct dwo_unit
*
10382 lookup_dwo_unit_in_dwp (struct dwp_file
*dwp_file
, const char *comp_dir
,
10383 ULONGEST signature
, int is_debug_types
)
10385 const struct dwp_hash_table
*dwp_htab
=
10386 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10387 bfd
*dbfd
= dwp_file
->dbfd
;
10388 uint32_t mask
= dwp_htab
->nr_slots
- 1;
10389 uint32_t hash
= signature
& mask
;
10390 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
10393 struct dwo_unit find_dwo_cu
;
10395 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
10396 find_dwo_cu
.signature
= signature
;
10397 slot
= htab_find_slot (is_debug_types
10398 ? dwp_file
->loaded_tus
10399 : dwp_file
->loaded_cus
,
10400 &find_dwo_cu
, INSERT
);
10403 return (struct dwo_unit
*) *slot
;
10405 /* Use a for loop so that we don't loop forever on bad debug info. */
10406 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
10408 ULONGEST signature_in_table
;
10410 signature_in_table
=
10411 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
10412 if (signature_in_table
== signature
)
10414 uint32_t unit_index
=
10415 read_4_bytes (dbfd
,
10416 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
10418 if (dwp_file
->version
== 1)
10420 *slot
= create_dwo_unit_in_dwp_v1 (dwp_file
, unit_index
,
10421 comp_dir
, signature
,
10426 *slot
= create_dwo_unit_in_dwp_v2 (dwp_file
, unit_index
,
10427 comp_dir
, signature
,
10430 return (struct dwo_unit
*) *slot
;
10432 if (signature_in_table
== 0)
10434 hash
= (hash
+ hash2
) & mask
;
10437 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
10438 " [in module %s]"),
10442 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
10443 Open the file specified by FILE_NAME and hand it off to BFD for
10444 preliminary analysis. Return a newly initialized bfd *, which
10445 includes a canonicalized copy of FILE_NAME.
10446 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
10447 SEARCH_CWD is true if the current directory is to be searched.
10448 It will be searched before debug-file-directory.
10449 If successful, the file is added to the bfd include table of the
10450 objfile's bfd (see gdb_bfd_record_inclusion).
10451 If unable to find/open the file, return NULL.
10452 NOTE: This function is derived from symfile_bfd_open. */
10454 static gdb_bfd_ref_ptr
10455 try_open_dwop_file (const char *file_name
, int is_dwp
, int search_cwd
)
10458 char *absolute_name
;
10459 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
10460 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
10461 to debug_file_directory. */
10463 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
10467 if (*debug_file_directory
!= '\0')
10468 search_path
= concat (".", dirname_separator_string
,
10469 debug_file_directory
, (char *) NULL
);
10471 search_path
= xstrdup (".");
10474 search_path
= xstrdup (debug_file_directory
);
10476 flags
= OPF_RETURN_REALPATH
;
10478 flags
|= OPF_SEARCH_IN_PATH
;
10479 desc
= openp (search_path
, flags
, file_name
,
10480 O_RDONLY
| O_BINARY
, &absolute_name
);
10481 xfree (search_path
);
10485 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (absolute_name
, gnutarget
, desc
));
10486 xfree (absolute_name
);
10487 if (sym_bfd
== NULL
)
10489 bfd_set_cacheable (sym_bfd
.get (), 1);
10491 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
10494 /* Success. Record the bfd as having been included by the objfile's bfd.
10495 This is important because things like demangled_names_hash lives in the
10496 objfile's per_bfd space and may have references to things like symbol
10497 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
10498 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
.get ());
10503 /* Try to open DWO file FILE_NAME.
10504 COMP_DIR is the DW_AT_comp_dir attribute.
10505 The result is the bfd handle of the file.
10506 If there is a problem finding or opening the file, return NULL.
10507 Upon success, the canonicalized path of the file is stored in the bfd,
10508 same as symfile_bfd_open. */
10510 static gdb_bfd_ref_ptr
10511 open_dwo_file (const char *file_name
, const char *comp_dir
)
10513 if (IS_ABSOLUTE_PATH (file_name
))
10514 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 0 /*search_cwd*/);
10516 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
10518 if (comp_dir
!= NULL
)
10520 char *path_to_try
= concat (comp_dir
, SLASH_STRING
,
10521 file_name
, (char *) NULL
);
10523 /* NOTE: If comp_dir is a relative path, this will also try the
10524 search path, which seems useful. */
10525 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (path_to_try
, 0 /*is_dwp*/,
10526 1 /*search_cwd*/));
10527 xfree (path_to_try
);
10532 /* That didn't work, try debug-file-directory, which, despite its name,
10533 is a list of paths. */
10535 if (*debug_file_directory
== '\0')
10538 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 1 /*search_cwd*/);
10541 /* This function is mapped across the sections and remembers the offset and
10542 size of each of the DWO debugging sections we are interested in. */
10545 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
10547 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
10548 const struct dwop_section_names
*names
= &dwop_section_names
;
10550 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10552 dwo_sections
->abbrev
.s
.section
= sectp
;
10553 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
10555 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
10557 dwo_sections
->info
.s
.section
= sectp
;
10558 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
10560 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10562 dwo_sections
->line
.s
.section
= sectp
;
10563 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
10565 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10567 dwo_sections
->loc
.s
.section
= sectp
;
10568 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
10570 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10572 dwo_sections
->macinfo
.s
.section
= sectp
;
10573 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
10575 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10577 dwo_sections
->macro
.s
.section
= sectp
;
10578 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
10580 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
10582 dwo_sections
->str
.s
.section
= sectp
;
10583 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
10585 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10587 dwo_sections
->str_offsets
.s
.section
= sectp
;
10588 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
10590 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
10592 struct dwarf2_section_info type_section
;
10594 memset (&type_section
, 0, sizeof (type_section
));
10595 type_section
.s
.section
= sectp
;
10596 type_section
.size
= bfd_get_section_size (sectp
);
10597 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
10602 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
10603 by PER_CU. This is for the non-DWP case.
10604 The result is NULL if DWO_NAME can't be found. */
10606 static struct dwo_file
*
10607 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
10608 const char *dwo_name
, const char *comp_dir
)
10610 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10611 struct dwo_file
*dwo_file
;
10612 struct cleanup
*cleanups
;
10614 gdb_bfd_ref_ptr
dbfd (open_dwo_file (dwo_name
, comp_dir
));
10617 if (dwarf_read_debug
)
10618 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
10621 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10622 dwo_file
->dwo_name
= dwo_name
;
10623 dwo_file
->comp_dir
= comp_dir
;
10624 dwo_file
->dbfd
= dbfd
.release ();
10626 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwo_file
);
10628 bfd_map_over_sections (dwo_file
->dbfd
, dwarf2_locate_dwo_sections
,
10629 &dwo_file
->sections
);
10631 dwo_file
->cu
= create_dwo_cu (dwo_file
);
10633 dwo_file
->tus
= create_debug_types_hash_table (dwo_file
,
10634 dwo_file
->sections
.types
);
10636 discard_cleanups (cleanups
);
10638 if (dwarf_read_debug
)
10639 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
10644 /* This function is mapped across the sections and remembers the offset and
10645 size of each of the DWP debugging sections common to version 1 and 2 that
10646 we are interested in. */
10649 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
10650 void *dwp_file_ptr
)
10652 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
10653 const struct dwop_section_names
*names
= &dwop_section_names
;
10654 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
10656 /* Record the ELF section number for later lookup: this is what the
10657 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10658 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
10659 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
10661 /* Look for specific sections that we need. */
10662 if (section_is_p (sectp
->name
, &names
->str_dwo
))
10664 dwp_file
->sections
.str
.s
.section
= sectp
;
10665 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
10667 else if (section_is_p (sectp
->name
, &names
->cu_index
))
10669 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
10670 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
10672 else if (section_is_p (sectp
->name
, &names
->tu_index
))
10674 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
10675 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
10679 /* This function is mapped across the sections and remembers the offset and
10680 size of each of the DWP version 2 debugging sections that we are interested
10681 in. This is split into a separate function because we don't know if we
10682 have version 1 or 2 until we parse the cu_index/tu_index sections. */
10685 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
10687 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
10688 const struct dwop_section_names
*names
= &dwop_section_names
;
10689 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
10691 /* Record the ELF section number for later lookup: this is what the
10692 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10693 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
10694 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
10696 /* Look for specific sections that we need. */
10697 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10699 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
10700 dwp_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
10702 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
10704 dwp_file
->sections
.info
.s
.section
= sectp
;
10705 dwp_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
10707 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10709 dwp_file
->sections
.line
.s
.section
= sectp
;
10710 dwp_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
10712 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10714 dwp_file
->sections
.loc
.s
.section
= sectp
;
10715 dwp_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
10717 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10719 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
10720 dwp_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
10722 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10724 dwp_file
->sections
.macro
.s
.section
= sectp
;
10725 dwp_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
10727 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10729 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
10730 dwp_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
10732 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
10734 dwp_file
->sections
.types
.s
.section
= sectp
;
10735 dwp_file
->sections
.types
.size
= bfd_get_section_size (sectp
);
10739 /* Hash function for dwp_file loaded CUs/TUs. */
10742 hash_dwp_loaded_cutus (const void *item
)
10744 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
10746 /* This drops the top 32 bits of the signature, but is ok for a hash. */
10747 return dwo_unit
->signature
;
10750 /* Equality function for dwp_file loaded CUs/TUs. */
10753 eq_dwp_loaded_cutus (const void *a
, const void *b
)
10755 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
10756 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
10758 return dua
->signature
== dub
->signature
;
10761 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
10764 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
10766 return htab_create_alloc_ex (3,
10767 hash_dwp_loaded_cutus
,
10768 eq_dwp_loaded_cutus
,
10770 &objfile
->objfile_obstack
,
10771 hashtab_obstack_allocate
,
10772 dummy_obstack_deallocate
);
10775 /* Try to open DWP file FILE_NAME.
10776 The result is the bfd handle of the file.
10777 If there is a problem finding or opening the file, return NULL.
10778 Upon success, the canonicalized path of the file is stored in the bfd,
10779 same as symfile_bfd_open. */
10781 static gdb_bfd_ref_ptr
10782 open_dwp_file (const char *file_name
)
10784 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (file_name
, 1 /*is_dwp*/,
10785 1 /*search_cwd*/));
10789 /* Work around upstream bug 15652.
10790 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
10791 [Whether that's a "bug" is debatable, but it is getting in our way.]
10792 We have no real idea where the dwp file is, because gdb's realpath-ing
10793 of the executable's path may have discarded the needed info.
10794 [IWBN if the dwp file name was recorded in the executable, akin to
10795 .gnu_debuglink, but that doesn't exist yet.]
10796 Strip the directory from FILE_NAME and search again. */
10797 if (*debug_file_directory
!= '\0')
10799 /* Don't implicitly search the current directory here.
10800 If the user wants to search "." to handle this case,
10801 it must be added to debug-file-directory. */
10802 return try_open_dwop_file (lbasename (file_name
), 1 /*is_dwp*/,
10809 /* Initialize the use of the DWP file for the current objfile.
10810 By convention the name of the DWP file is ${objfile}.dwp.
10811 The result is NULL if it can't be found. */
10813 static struct dwp_file
*
10814 open_and_init_dwp_file (void)
10816 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10817 struct dwp_file
*dwp_file
;
10819 struct cleanup
*cleanups
= make_cleanup (null_cleanup
, 0);
10821 /* Try to find first .dwp for the binary file before any symbolic links
10824 /* If the objfile is a debug file, find the name of the real binary
10825 file and get the name of dwp file from there. */
10826 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
10828 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
10829 const char *backlink_basename
= lbasename (backlink
->original_name
);
10830 char *debug_dirname
= ldirname (objfile
->original_name
);
10832 make_cleanup (xfree
, debug_dirname
);
10833 dwp_name
= xstrprintf ("%s%s%s.dwp", debug_dirname
,
10834 SLASH_STRING
, backlink_basename
);
10837 dwp_name
= xstrprintf ("%s.dwp", objfile
->original_name
);
10838 make_cleanup (xfree
, dwp_name
);
10840 gdb_bfd_ref_ptr
dbfd (open_dwp_file (dwp_name
));
10842 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
10844 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
10845 dwp_name
= xstrprintf ("%s.dwp", objfile_name (objfile
));
10846 make_cleanup (xfree
, dwp_name
);
10847 dbfd
= open_dwp_file (dwp_name
);
10852 if (dwarf_read_debug
)
10853 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
);
10854 do_cleanups (cleanups
);
10857 dwp_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_file
);
10858 dwp_file
->name
= bfd_get_filename (dbfd
.get ());
10859 dwp_file
->dbfd
= dbfd
.release ();
10860 do_cleanups (cleanups
);
10862 /* +1: section 0 is unused */
10863 dwp_file
->num_sections
= bfd_count_sections (dwp_file
->dbfd
) + 1;
10864 dwp_file
->elf_sections
=
10865 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
10866 dwp_file
->num_sections
, asection
*);
10868 bfd_map_over_sections (dwp_file
->dbfd
, dwarf2_locate_common_dwp_sections
,
10871 dwp_file
->cus
= create_dwp_hash_table (dwp_file
, 0);
10873 dwp_file
->tus
= create_dwp_hash_table (dwp_file
, 1);
10875 /* The DWP file version is stored in the hash table. Oh well. */
10876 if (dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
10878 /* Technically speaking, we should try to limp along, but this is
10879 pretty bizarre. We use pulongest here because that's the established
10880 portability solution (e.g, we cannot use %u for uint32_t). */
10881 error (_("Dwarf Error: DWP file CU version %s doesn't match"
10882 " TU version %s [in DWP file %s]"),
10883 pulongest (dwp_file
->cus
->version
),
10884 pulongest (dwp_file
->tus
->version
), dwp_name
);
10886 dwp_file
->version
= dwp_file
->cus
->version
;
10888 if (dwp_file
->version
== 2)
10889 bfd_map_over_sections (dwp_file
->dbfd
, dwarf2_locate_v2_dwp_sections
,
10892 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
10893 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
10895 if (dwarf_read_debug
)
10897 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
10898 fprintf_unfiltered (gdb_stdlog
,
10899 " %s CUs, %s TUs\n",
10900 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
10901 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
10907 /* Wrapper around open_and_init_dwp_file, only open it once. */
10909 static struct dwp_file
*
10910 get_dwp_file (void)
10912 if (! dwarf2_per_objfile
->dwp_checked
)
10914 dwarf2_per_objfile
->dwp_file
= open_and_init_dwp_file ();
10915 dwarf2_per_objfile
->dwp_checked
= 1;
10917 return dwarf2_per_objfile
->dwp_file
;
10920 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
10921 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
10922 or in the DWP file for the objfile, referenced by THIS_UNIT.
10923 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
10924 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
10926 This is called, for example, when wanting to read a variable with a
10927 complex location. Therefore we don't want to do file i/o for every call.
10928 Therefore we don't want to look for a DWO file on every call.
10929 Therefore we first see if we've already seen SIGNATURE in a DWP file,
10930 then we check if we've already seen DWO_NAME, and only THEN do we check
10933 The result is a pointer to the dwo_unit object or NULL if we didn't find it
10934 (dwo_id mismatch or couldn't find the DWO/DWP file). */
10936 static struct dwo_unit
*
10937 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
10938 const char *dwo_name
, const char *comp_dir
,
10939 ULONGEST signature
, int is_debug_types
)
10941 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10942 const char *kind
= is_debug_types
? "TU" : "CU";
10943 void **dwo_file_slot
;
10944 struct dwo_file
*dwo_file
;
10945 struct dwp_file
*dwp_file
;
10947 /* First see if there's a DWP file.
10948 If we have a DWP file but didn't find the DWO inside it, don't
10949 look for the original DWO file. It makes gdb behave differently
10950 depending on whether one is debugging in the build tree. */
10952 dwp_file
= get_dwp_file ();
10953 if (dwp_file
!= NULL
)
10955 const struct dwp_hash_table
*dwp_htab
=
10956 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10958 if (dwp_htab
!= NULL
)
10960 struct dwo_unit
*dwo_cutu
=
10961 lookup_dwo_unit_in_dwp (dwp_file
, comp_dir
,
10962 signature
, is_debug_types
);
10964 if (dwo_cutu
!= NULL
)
10966 if (dwarf_read_debug
)
10968 fprintf_unfiltered (gdb_stdlog
,
10969 "Virtual DWO %s %s found: @%s\n",
10970 kind
, hex_string (signature
),
10971 host_address_to_string (dwo_cutu
));
10979 /* No DWP file, look for the DWO file. */
10981 dwo_file_slot
= lookup_dwo_file_slot (dwo_name
, comp_dir
);
10982 if (*dwo_file_slot
== NULL
)
10984 /* Read in the file and build a table of the CUs/TUs it contains. */
10985 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
10987 /* NOTE: This will be NULL if unable to open the file. */
10988 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
10990 if (dwo_file
!= NULL
)
10992 struct dwo_unit
*dwo_cutu
= NULL
;
10994 if (is_debug_types
&& dwo_file
->tus
)
10996 struct dwo_unit find_dwo_cutu
;
10998 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
10999 find_dwo_cutu
.signature
= signature
;
11001 = (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_cutu
);
11003 else if (!is_debug_types
&& dwo_file
->cu
)
11005 if (signature
== dwo_file
->cu
->signature
)
11006 dwo_cutu
= dwo_file
->cu
;
11009 if (dwo_cutu
!= NULL
)
11011 if (dwarf_read_debug
)
11013 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
11014 kind
, dwo_name
, hex_string (signature
),
11015 host_address_to_string (dwo_cutu
));
11022 /* We didn't find it. This could mean a dwo_id mismatch, or
11023 someone deleted the DWO/DWP file, or the search path isn't set up
11024 correctly to find the file. */
11026 if (dwarf_read_debug
)
11028 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
11029 kind
, dwo_name
, hex_string (signature
));
11032 /* This is a warning and not a complaint because it can be caused by
11033 pilot error (e.g., user accidentally deleting the DWO). */
11035 /* Print the name of the DWP file if we looked there, helps the user
11036 better diagnose the problem. */
11037 char *dwp_text
= NULL
;
11038 struct cleanup
*cleanups
;
11040 if (dwp_file
!= NULL
)
11041 dwp_text
= xstrprintf (" [in DWP file %s]", lbasename (dwp_file
->name
));
11042 cleanups
= make_cleanup (xfree
, dwp_text
);
11044 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x"
11045 " [in module %s]"),
11046 kind
, dwo_name
, hex_string (signature
),
11047 dwp_text
!= NULL
? dwp_text
: "",
11048 this_unit
->is_debug_types
? "TU" : "CU",
11049 this_unit
->offset
.sect_off
, objfile_name (objfile
));
11051 do_cleanups (cleanups
);
11056 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
11057 See lookup_dwo_cutu_unit for details. */
11059 static struct dwo_unit
*
11060 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
11061 const char *dwo_name
, const char *comp_dir
,
11062 ULONGEST signature
)
11064 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
11067 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
11068 See lookup_dwo_cutu_unit for details. */
11070 static struct dwo_unit
*
11071 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
11072 const char *dwo_name
, const char *comp_dir
)
11074 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
11077 /* Traversal function for queue_and_load_all_dwo_tus. */
11080 queue_and_load_dwo_tu (void **slot
, void *info
)
11082 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
11083 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
11084 ULONGEST signature
= dwo_unit
->signature
;
11085 struct signatured_type
*sig_type
=
11086 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
11088 if (sig_type
!= NULL
)
11090 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
11092 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
11093 a real dependency of PER_CU on SIG_TYPE. That is detected later
11094 while processing PER_CU. */
11095 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
11096 load_full_type_unit (sig_cu
);
11097 VEC_safe_push (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, sig_cu
);
11103 /* Queue all TUs contained in the DWO of PER_CU to be read in.
11104 The DWO may have the only definition of the type, though it may not be
11105 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
11106 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
11109 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
11111 struct dwo_unit
*dwo_unit
;
11112 struct dwo_file
*dwo_file
;
11114 gdb_assert (!per_cu
->is_debug_types
);
11115 gdb_assert (get_dwp_file () == NULL
);
11116 gdb_assert (per_cu
->cu
!= NULL
);
11118 dwo_unit
= per_cu
->cu
->dwo_unit
;
11119 gdb_assert (dwo_unit
!= NULL
);
11121 dwo_file
= dwo_unit
->dwo_file
;
11122 if (dwo_file
->tus
!= NULL
)
11123 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
11126 /* Free all resources associated with DWO_FILE.
11127 Close the DWO file and munmap the sections.
11128 All memory should be on the objfile obstack. */
11131 free_dwo_file (struct dwo_file
*dwo_file
, struct objfile
*objfile
)
11134 /* Note: dbfd is NULL for virtual DWO files. */
11135 gdb_bfd_unref (dwo_file
->dbfd
);
11137 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
11140 /* Wrapper for free_dwo_file for use in cleanups. */
11143 free_dwo_file_cleanup (void *arg
)
11145 struct dwo_file
*dwo_file
= (struct dwo_file
*) arg
;
11146 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11148 free_dwo_file (dwo_file
, objfile
);
11151 /* Traversal function for free_dwo_files. */
11154 free_dwo_file_from_slot (void **slot
, void *info
)
11156 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
11157 struct objfile
*objfile
= (struct objfile
*) info
;
11159 free_dwo_file (dwo_file
, objfile
);
11164 /* Free all resources associated with DWO_FILES. */
11167 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
11169 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
11172 /* Read in various DIEs. */
11174 /* qsort helper for inherit_abstract_dies. */
11177 unsigned_int_compar (const void *ap
, const void *bp
)
11179 unsigned int a
= *(unsigned int *) ap
;
11180 unsigned int b
= *(unsigned int *) bp
;
11182 return (a
> b
) - (b
> a
);
11185 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
11186 Inherit only the children of the DW_AT_abstract_origin DIE not being
11187 already referenced by DW_AT_abstract_origin from the children of the
11191 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
11193 struct die_info
*child_die
;
11194 unsigned die_children_count
;
11195 /* CU offsets which were referenced by children of the current DIE. */
11196 sect_offset
*offsets
;
11197 sect_offset
*offsets_end
, *offsetp
;
11198 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
11199 struct die_info
*origin_die
;
11200 /* Iterator of the ORIGIN_DIE children. */
11201 struct die_info
*origin_child_die
;
11202 struct cleanup
*cleanups
;
11203 struct attribute
*attr
;
11204 struct dwarf2_cu
*origin_cu
;
11205 struct pending
**origin_previous_list_in_scope
;
11207 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
11211 /* Note that following die references may follow to a die in a
11215 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
11217 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
11219 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
11220 origin_cu
->list_in_scope
= cu
->list_in_scope
;
11222 if (die
->tag
!= origin_die
->tag
11223 && !(die
->tag
== DW_TAG_inlined_subroutine
11224 && origin_die
->tag
== DW_TAG_subprogram
))
11225 complaint (&symfile_complaints
,
11226 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
11227 die
->offset
.sect_off
, origin_die
->offset
.sect_off
);
11229 child_die
= die
->child
;
11230 die_children_count
= 0;
11231 while (child_die
&& child_die
->tag
)
11233 child_die
= sibling_die (child_die
);
11234 die_children_count
++;
11236 offsets
= XNEWVEC (sect_offset
, die_children_count
);
11237 cleanups
= make_cleanup (xfree
, offsets
);
11239 offsets_end
= offsets
;
11240 for (child_die
= die
->child
;
11241 child_die
&& child_die
->tag
;
11242 child_die
= sibling_die (child_die
))
11244 struct die_info
*child_origin_die
;
11245 struct dwarf2_cu
*child_origin_cu
;
11247 /* We are trying to process concrete instance entries:
11248 DW_TAG_GNU_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
11249 it's not relevant to our analysis here. i.e. detecting DIEs that are
11250 present in the abstract instance but not referenced in the concrete
11252 if (child_die
->tag
== DW_TAG_GNU_call_site
)
11255 /* For each CHILD_DIE, find the corresponding child of
11256 ORIGIN_DIE. If there is more than one layer of
11257 DW_AT_abstract_origin, follow them all; there shouldn't be,
11258 but GCC versions at least through 4.4 generate this (GCC PR
11260 child_origin_die
= child_die
;
11261 child_origin_cu
= cu
;
11264 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
11268 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
11272 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
11273 counterpart may exist. */
11274 if (child_origin_die
!= child_die
)
11276 if (child_die
->tag
!= child_origin_die
->tag
11277 && !(child_die
->tag
== DW_TAG_inlined_subroutine
11278 && child_origin_die
->tag
== DW_TAG_subprogram
))
11279 complaint (&symfile_complaints
,
11280 _("Child DIE 0x%x and its abstract origin 0x%x have "
11281 "different tags"), child_die
->offset
.sect_off
,
11282 child_origin_die
->offset
.sect_off
);
11283 if (child_origin_die
->parent
!= origin_die
)
11284 complaint (&symfile_complaints
,
11285 _("Child DIE 0x%x and its abstract origin 0x%x have "
11286 "different parents"), child_die
->offset
.sect_off
,
11287 child_origin_die
->offset
.sect_off
);
11289 *offsets_end
++ = child_origin_die
->offset
;
11292 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
11293 unsigned_int_compar
);
11294 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
11295 if (offsetp
[-1].sect_off
== offsetp
->sect_off
)
11296 complaint (&symfile_complaints
,
11297 _("Multiple children of DIE 0x%x refer "
11298 "to DIE 0x%x as their abstract origin"),
11299 die
->offset
.sect_off
, offsetp
->sect_off
);
11302 origin_child_die
= origin_die
->child
;
11303 while (origin_child_die
&& origin_child_die
->tag
)
11305 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
11306 while (offsetp
< offsets_end
11307 && offsetp
->sect_off
< origin_child_die
->offset
.sect_off
)
11309 if (offsetp
>= offsets_end
11310 || offsetp
->sect_off
> origin_child_die
->offset
.sect_off
)
11312 /* Found that ORIGIN_CHILD_DIE is really not referenced.
11313 Check whether we're already processing ORIGIN_CHILD_DIE.
11314 This can happen with mutually referenced abstract_origins.
11316 if (!origin_child_die
->in_process
)
11317 process_die (origin_child_die
, origin_cu
);
11319 origin_child_die
= sibling_die (origin_child_die
);
11321 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
11323 do_cleanups (cleanups
);
11327 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11329 struct objfile
*objfile
= cu
->objfile
;
11330 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11331 struct context_stack
*newobj
;
11334 struct die_info
*child_die
;
11335 struct attribute
*attr
, *call_line
, *call_file
;
11337 CORE_ADDR baseaddr
;
11338 struct block
*block
;
11339 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
11340 VEC (symbolp
) *template_args
= NULL
;
11341 struct template_symbol
*templ_func
= NULL
;
11345 /* If we do not have call site information, we can't show the
11346 caller of this inlined function. That's too confusing, so
11347 only use the scope for local variables. */
11348 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
11349 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
11350 if (call_line
== NULL
|| call_file
== NULL
)
11352 read_lexical_block_scope (die
, cu
);
11357 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11359 name
= dwarf2_name (die
, cu
);
11361 /* Ignore functions with missing or empty names. These are actually
11362 illegal according to the DWARF standard. */
11365 complaint (&symfile_complaints
,
11366 _("missing name for subprogram DIE at %d"),
11367 die
->offset
.sect_off
);
11371 /* Ignore functions with missing or invalid low and high pc attributes. */
11372 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
11373 <= PC_BOUNDS_INVALID
)
11375 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
11376 if (!attr
|| !DW_UNSND (attr
))
11377 complaint (&symfile_complaints
,
11378 _("cannot get low and high bounds "
11379 "for subprogram DIE at %d"),
11380 die
->offset
.sect_off
);
11384 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11385 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
11387 /* If we have any template arguments, then we must allocate a
11388 different sort of symbol. */
11389 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
11391 if (child_die
->tag
== DW_TAG_template_type_param
11392 || child_die
->tag
== DW_TAG_template_value_param
)
11394 templ_func
= allocate_template_symbol (objfile
);
11395 templ_func
->base
.is_cplus_template_function
= 1;
11400 newobj
= push_context (0, lowpc
);
11401 newobj
->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
11402 (struct symbol
*) templ_func
);
11404 /* If there is a location expression for DW_AT_frame_base, record
11406 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
11408 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
11410 /* If there is a location for the static link, record it. */
11411 newobj
->static_link
= NULL
;
11412 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
11415 newobj
->static_link
11416 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
11417 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
);
11420 cu
->list_in_scope
= &local_symbols
;
11422 if (die
->child
!= NULL
)
11424 child_die
= die
->child
;
11425 while (child_die
&& child_die
->tag
)
11427 if (child_die
->tag
== DW_TAG_template_type_param
11428 || child_die
->tag
== DW_TAG_template_value_param
)
11430 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
11433 VEC_safe_push (symbolp
, template_args
, arg
);
11436 process_die (child_die
, cu
);
11437 child_die
= sibling_die (child_die
);
11441 inherit_abstract_dies (die
, cu
);
11443 /* If we have a DW_AT_specification, we might need to import using
11444 directives from the context of the specification DIE. See the
11445 comment in determine_prefix. */
11446 if (cu
->language
== language_cplus
11447 && dwarf2_attr (die
, DW_AT_specification
, cu
))
11449 struct dwarf2_cu
*spec_cu
= cu
;
11450 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
11454 child_die
= spec_die
->child
;
11455 while (child_die
&& child_die
->tag
)
11457 if (child_die
->tag
== DW_TAG_imported_module
)
11458 process_die (child_die
, spec_cu
);
11459 child_die
= sibling_die (child_die
);
11462 /* In some cases, GCC generates specification DIEs that
11463 themselves contain DW_AT_specification attributes. */
11464 spec_die
= die_specification (spec_die
, &spec_cu
);
11468 newobj
= pop_context ();
11469 /* Make a block for the local symbols within. */
11470 block
= finish_block (newobj
->name
, &local_symbols
, newobj
->old_blocks
,
11471 newobj
->static_link
, lowpc
, highpc
);
11473 /* For C++, set the block's scope. */
11474 if ((cu
->language
== language_cplus
11475 || cu
->language
== language_fortran
11476 || cu
->language
== language_d
11477 || cu
->language
== language_rust
)
11478 && cu
->processing_has_namespace_info
)
11479 block_set_scope (block
, determine_prefix (die
, cu
),
11480 &objfile
->objfile_obstack
);
11482 /* If we have address ranges, record them. */
11483 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11485 gdbarch_make_symbol_special (gdbarch
, newobj
->name
, objfile
);
11487 /* Attach template arguments to function. */
11488 if (! VEC_empty (symbolp
, template_args
))
11490 gdb_assert (templ_func
!= NULL
);
11492 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
11493 templ_func
->template_arguments
11494 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
11495 templ_func
->n_template_arguments
);
11496 memcpy (templ_func
->template_arguments
,
11497 VEC_address (symbolp
, template_args
),
11498 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
11499 VEC_free (symbolp
, template_args
);
11502 /* In C++, we can have functions nested inside functions (e.g., when
11503 a function declares a class that has methods). This means that
11504 when we finish processing a function scope, we may need to go
11505 back to building a containing block's symbol lists. */
11506 local_symbols
= newobj
->locals
;
11507 local_using_directives
= newobj
->local_using_directives
;
11509 /* If we've finished processing a top-level function, subsequent
11510 symbols go in the file symbol list. */
11511 if (outermost_context_p ())
11512 cu
->list_in_scope
= &file_symbols
;
11515 /* Process all the DIES contained within a lexical block scope. Start
11516 a new scope, process the dies, and then close the scope. */
11519 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11521 struct objfile
*objfile
= cu
->objfile
;
11522 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11523 struct context_stack
*newobj
;
11524 CORE_ADDR lowpc
, highpc
;
11525 struct die_info
*child_die
;
11526 CORE_ADDR baseaddr
;
11528 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11530 /* Ignore blocks with missing or invalid low and high pc attributes. */
11531 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
11532 as multiple lexical blocks? Handling children in a sane way would
11533 be nasty. Might be easier to properly extend generic blocks to
11534 describe ranges. */
11535 switch (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
11537 case PC_BOUNDS_NOT_PRESENT
:
11538 /* DW_TAG_lexical_block has no attributes, process its children as if
11539 there was no wrapping by that DW_TAG_lexical_block.
11540 GCC does no longer produces such DWARF since GCC r224161. */
11541 for (child_die
= die
->child
;
11542 child_die
!= NULL
&& child_die
->tag
;
11543 child_die
= sibling_die (child_die
))
11544 process_die (child_die
, cu
);
11546 case PC_BOUNDS_INVALID
:
11549 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11550 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
11552 push_context (0, lowpc
);
11553 if (die
->child
!= NULL
)
11555 child_die
= die
->child
;
11556 while (child_die
&& child_die
->tag
)
11558 process_die (child_die
, cu
);
11559 child_die
= sibling_die (child_die
);
11562 inherit_abstract_dies (die
, cu
);
11563 newobj
= pop_context ();
11565 if (local_symbols
!= NULL
|| local_using_directives
!= NULL
)
11567 struct block
*block
11568 = finish_block (0, &local_symbols
, newobj
->old_blocks
, NULL
,
11569 newobj
->start_addr
, highpc
);
11571 /* Note that recording ranges after traversing children, as we
11572 do here, means that recording a parent's ranges entails
11573 walking across all its children's ranges as they appear in
11574 the address map, which is quadratic behavior.
11576 It would be nicer to record the parent's ranges before
11577 traversing its children, simply overriding whatever you find
11578 there. But since we don't even decide whether to create a
11579 block until after we've traversed its children, that's hard
11581 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11583 local_symbols
= newobj
->locals
;
11584 local_using_directives
= newobj
->local_using_directives
;
11587 /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */
11590 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11592 struct objfile
*objfile
= cu
->objfile
;
11593 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11594 CORE_ADDR pc
, baseaddr
;
11595 struct attribute
*attr
;
11596 struct call_site
*call_site
, call_site_local
;
11599 struct die_info
*child_die
;
11601 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11603 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
11606 complaint (&symfile_complaints
,
11607 _("missing DW_AT_low_pc for DW_TAG_GNU_call_site "
11608 "DIE 0x%x [in module %s]"),
11609 die
->offset
.sect_off
, objfile_name (objfile
));
11612 pc
= attr_value_as_address (attr
) + baseaddr
;
11613 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
11615 if (cu
->call_site_htab
== NULL
)
11616 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
11617 NULL
, &objfile
->objfile_obstack
,
11618 hashtab_obstack_allocate
, NULL
);
11619 call_site_local
.pc
= pc
;
11620 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
11623 complaint (&symfile_complaints
,
11624 _("Duplicate PC %s for DW_TAG_GNU_call_site "
11625 "DIE 0x%x [in module %s]"),
11626 paddress (gdbarch
, pc
), die
->offset
.sect_off
,
11627 objfile_name (objfile
));
11631 /* Count parameters at the caller. */
11634 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
11635 child_die
= sibling_die (child_die
))
11637 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11639 complaint (&symfile_complaints
,
11640 _("Tag %d is not DW_TAG_GNU_call_site_parameter in "
11641 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11642 child_die
->tag
, child_die
->offset
.sect_off
,
11643 objfile_name (objfile
));
11651 = ((struct call_site
*)
11652 obstack_alloc (&objfile
->objfile_obstack
,
11653 sizeof (*call_site
)
11654 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
11656 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
11657 call_site
->pc
= pc
;
11659 if (dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
11661 struct die_info
*func_die
;
11663 /* Skip also over DW_TAG_inlined_subroutine. */
11664 for (func_die
= die
->parent
;
11665 func_die
&& func_die
->tag
!= DW_TAG_subprogram
11666 && func_die
->tag
!= DW_TAG_subroutine_type
;
11667 func_die
= func_die
->parent
);
11669 /* DW_AT_GNU_all_call_sites is a superset
11670 of DW_AT_GNU_all_tail_call_sites. */
11672 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
11673 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
11675 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
11676 not complete. But keep CALL_SITE for look ups via call_site_htab,
11677 both the initial caller containing the real return address PC and
11678 the final callee containing the current PC of a chain of tail
11679 calls do not need to have the tail call list complete. But any
11680 function candidate for a virtual tail call frame searched via
11681 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
11682 determined unambiguously. */
11686 struct type
*func_type
= NULL
;
11689 func_type
= get_die_type (func_die
, cu
);
11690 if (func_type
!= NULL
)
11692 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
11694 /* Enlist this call site to the function. */
11695 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
11696 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
11699 complaint (&symfile_complaints
,
11700 _("Cannot find function owning DW_TAG_GNU_call_site "
11701 "DIE 0x%x [in module %s]"),
11702 die
->offset
.sect_off
, objfile_name (objfile
));
11706 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
11708 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
11709 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
11710 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
11711 /* Keep NULL DWARF_BLOCK. */;
11712 else if (attr_form_is_block (attr
))
11714 struct dwarf2_locexpr_baton
*dlbaton
;
11716 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
11717 dlbaton
->data
= DW_BLOCK (attr
)->data
;
11718 dlbaton
->size
= DW_BLOCK (attr
)->size
;
11719 dlbaton
->per_cu
= cu
->per_cu
;
11721 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
11723 else if (attr_form_is_ref (attr
))
11725 struct dwarf2_cu
*target_cu
= cu
;
11726 struct die_info
*target_die
;
11728 target_die
= follow_die_ref (die
, attr
, &target_cu
);
11729 gdb_assert (target_cu
->objfile
== objfile
);
11730 if (die_is_declaration (target_die
, target_cu
))
11732 const char *target_physname
;
11734 /* Prefer the mangled name; otherwise compute the demangled one. */
11735 target_physname
= dwarf2_string_attr (target_die
,
11736 DW_AT_linkage_name
,
11738 if (target_physname
== NULL
)
11739 target_physname
= dwarf2_string_attr (target_die
,
11740 DW_AT_MIPS_linkage_name
,
11742 if (target_physname
== NULL
)
11743 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
11744 if (target_physname
== NULL
)
11745 complaint (&symfile_complaints
,
11746 _("DW_AT_GNU_call_site_target target DIE has invalid "
11747 "physname, for referencing DIE 0x%x [in module %s]"),
11748 die
->offset
.sect_off
, objfile_name (objfile
));
11750 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
11756 /* DW_AT_entry_pc should be preferred. */
11757 if (dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
)
11758 <= PC_BOUNDS_INVALID
)
11759 complaint (&symfile_complaints
,
11760 _("DW_AT_GNU_call_site_target target DIE has invalid "
11761 "low pc, for referencing DIE 0x%x [in module %s]"),
11762 die
->offset
.sect_off
, objfile_name (objfile
));
11765 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11766 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
11771 complaint (&symfile_complaints
,
11772 _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither "
11773 "block nor reference, for DIE 0x%x [in module %s]"),
11774 die
->offset
.sect_off
, objfile_name (objfile
));
11776 call_site
->per_cu
= cu
->per_cu
;
11778 for (child_die
= die
->child
;
11779 child_die
&& child_die
->tag
;
11780 child_die
= sibling_die (child_die
))
11782 struct call_site_parameter
*parameter
;
11783 struct attribute
*loc
, *origin
;
11785 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11787 /* Already printed the complaint above. */
11791 gdb_assert (call_site
->parameter_count
< nparams
);
11792 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
11794 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
11795 specifies DW_TAG_formal_parameter. Value of the data assumed for the
11796 register is contained in DW_AT_GNU_call_site_value. */
11798 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
11799 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
11800 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
11802 sect_offset offset
;
11804 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
11805 offset
= dwarf2_get_ref_die_offset (origin
);
11806 if (!offset_in_cu_p (&cu
->header
, offset
))
11808 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
11809 binding can be done only inside one CU. Such referenced DIE
11810 therefore cannot be even moved to DW_TAG_partial_unit. */
11811 complaint (&symfile_complaints
,
11812 _("DW_AT_abstract_origin offset is not in CU for "
11813 "DW_TAG_GNU_call_site child DIE 0x%x "
11815 child_die
->offset
.sect_off
, objfile_name (objfile
));
11818 parameter
->u
.param_offset
.cu_off
= (offset
.sect_off
11819 - cu
->header
.offset
.sect_off
);
11821 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
11823 complaint (&symfile_complaints
,
11824 _("No DW_FORM_block* DW_AT_location for "
11825 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11826 child_die
->offset
.sect_off
, objfile_name (objfile
));
11831 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
11832 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
11833 if (parameter
->u
.dwarf_reg
!= -1)
11834 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
11835 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
11836 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
11837 ¶meter
->u
.fb_offset
))
11838 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
11841 complaint (&symfile_complaints
,
11842 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
11843 "for DW_FORM_block* DW_AT_location is supported for "
11844 "DW_TAG_GNU_call_site child DIE 0x%x "
11846 child_die
->offset
.sect_off
, objfile_name (objfile
));
11851 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
11852 if (!attr_form_is_block (attr
))
11854 complaint (&symfile_complaints
,
11855 _("No DW_FORM_block* DW_AT_GNU_call_site_value for "
11856 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11857 child_die
->offset
.sect_off
, objfile_name (objfile
));
11860 parameter
->value
= DW_BLOCK (attr
)->data
;
11861 parameter
->value_size
= DW_BLOCK (attr
)->size
;
11863 /* Parameters are not pre-cleared by memset above. */
11864 parameter
->data_value
= NULL
;
11865 parameter
->data_value_size
= 0;
11866 call_site
->parameter_count
++;
11868 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
11871 if (!attr_form_is_block (attr
))
11872 complaint (&symfile_complaints
,
11873 _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for "
11874 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11875 child_die
->offset
.sect_off
, objfile_name (objfile
));
11878 parameter
->data_value
= DW_BLOCK (attr
)->data
;
11879 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
11885 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
11886 Return 1 if the attributes are present and valid, otherwise, return 0.
11887 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
11890 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
11891 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
11892 struct partial_symtab
*ranges_pst
)
11894 struct objfile
*objfile
= cu
->objfile
;
11895 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11896 struct comp_unit_head
*cu_header
= &cu
->header
;
11897 bfd
*obfd
= objfile
->obfd
;
11898 unsigned int addr_size
= cu_header
->addr_size
;
11899 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
11900 /* Base address selection entry. */
11903 unsigned int dummy
;
11904 const gdb_byte
*buffer
;
11907 CORE_ADDR high
= 0;
11908 CORE_ADDR baseaddr
;
11910 found_base
= cu
->base_known
;
11911 base
= cu
->base_address
;
11913 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
11914 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
11916 complaint (&symfile_complaints
,
11917 _("Offset %d out of bounds for DW_AT_ranges attribute"),
11921 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
11925 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11929 CORE_ADDR range_beginning
, range_end
;
11931 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
11932 buffer
+= addr_size
;
11933 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
11934 buffer
+= addr_size
;
11935 offset
+= 2 * addr_size
;
11937 /* An end of list marker is a pair of zero addresses. */
11938 if (range_beginning
== 0 && range_end
== 0)
11939 /* Found the end of list entry. */
11942 /* Each base address selection entry is a pair of 2 values.
11943 The first is the largest possible address, the second is
11944 the base address. Check for a base address here. */
11945 if ((range_beginning
& mask
) == mask
)
11947 /* If we found the largest possible address, then we already
11948 have the base address in range_end. */
11956 /* We have no valid base address for the ranges
11958 complaint (&symfile_complaints
,
11959 _("Invalid .debug_ranges data (no base address)"));
11963 if (range_beginning
> range_end
)
11965 /* Inverted range entries are invalid. */
11966 complaint (&symfile_complaints
,
11967 _("Invalid .debug_ranges data (inverted range)"));
11971 /* Empty range entries have no effect. */
11972 if (range_beginning
== range_end
)
11975 range_beginning
+= base
;
11978 /* A not-uncommon case of bad debug info.
11979 Don't pollute the addrmap with bad data. */
11980 if (range_beginning
+ baseaddr
== 0
11981 && !dwarf2_per_objfile
->has_section_at_zero
)
11983 complaint (&symfile_complaints
,
11984 _(".debug_ranges entry has start address of zero"
11985 " [in module %s]"), objfile_name (objfile
));
11989 if (ranges_pst
!= NULL
)
11994 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
11995 range_beginning
+ baseaddr
);
11996 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
11997 range_end
+ baseaddr
);
11998 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
12002 /* FIXME: This is recording everything as a low-high
12003 segment of consecutive addresses. We should have a
12004 data structure for discontiguous block ranges
12008 low
= range_beginning
;
12014 if (range_beginning
< low
)
12015 low
= range_beginning
;
12016 if (range_end
> high
)
12022 /* If the first entry is an end-of-list marker, the range
12023 describes an empty scope, i.e. no instructions. */
12029 *high_return
= high
;
12033 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
12034 definition for the return value. *LOWPC and *HIGHPC are set iff
12035 neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */
12037 static enum pc_bounds_kind
12038 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
12039 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
12040 struct partial_symtab
*pst
)
12042 struct attribute
*attr
;
12043 struct attribute
*attr_high
;
12045 CORE_ADDR high
= 0;
12046 enum pc_bounds_kind ret
;
12048 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
12051 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
12054 low
= attr_value_as_address (attr
);
12055 high
= attr_value_as_address (attr_high
);
12056 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
12060 /* Found high w/o low attribute. */
12061 return PC_BOUNDS_INVALID
;
12063 /* Found consecutive range of addresses. */
12064 ret
= PC_BOUNDS_HIGH_LOW
;
12068 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
12071 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
12072 We take advantage of the fact that DW_AT_ranges does not appear
12073 in DW_TAG_compile_unit of DWO files. */
12074 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
12075 unsigned int ranges_offset
= (DW_UNSND (attr
)
12076 + (need_ranges_base
12080 /* Value of the DW_AT_ranges attribute is the offset in the
12081 .debug_ranges section. */
12082 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
12083 return PC_BOUNDS_INVALID
;
12084 /* Found discontinuous range of addresses. */
12085 ret
= PC_BOUNDS_RANGES
;
12088 return PC_BOUNDS_NOT_PRESENT
;
12091 /* read_partial_die has also the strict LOW < HIGH requirement. */
12093 return PC_BOUNDS_INVALID
;
12095 /* When using the GNU linker, .gnu.linkonce. sections are used to
12096 eliminate duplicate copies of functions and vtables and such.
12097 The linker will arbitrarily choose one and discard the others.
12098 The AT_*_pc values for such functions refer to local labels in
12099 these sections. If the section from that file was discarded, the
12100 labels are not in the output, so the relocs get a value of 0.
12101 If this is a discarded function, mark the pc bounds as invalid,
12102 so that GDB will ignore it. */
12103 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12104 return PC_BOUNDS_INVALID
;
12112 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
12113 its low and high PC addresses. Do nothing if these addresses could not
12114 be determined. Otherwise, set LOWPC to the low address if it is smaller,
12115 and HIGHPC to the high address if greater than HIGHPC. */
12118 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
12119 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
12120 struct dwarf2_cu
*cu
)
12122 CORE_ADDR low
, high
;
12123 struct die_info
*child
= die
->child
;
12125 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
) >= PC_BOUNDS_RANGES
)
12127 *lowpc
= std::min (*lowpc
, low
);
12128 *highpc
= std::max (*highpc
, high
);
12131 /* If the language does not allow nested subprograms (either inside
12132 subprograms or lexical blocks), we're done. */
12133 if (cu
->language
!= language_ada
)
12136 /* Check all the children of the given DIE. If it contains nested
12137 subprograms, then check their pc bounds. Likewise, we need to
12138 check lexical blocks as well, as they may also contain subprogram
12140 while (child
&& child
->tag
)
12142 if (child
->tag
== DW_TAG_subprogram
12143 || child
->tag
== DW_TAG_lexical_block
)
12144 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
12145 child
= sibling_die (child
);
12149 /* Get the low and high pc's represented by the scope DIE, and store
12150 them in *LOWPC and *HIGHPC. If the correct values can't be
12151 determined, set *LOWPC to -1 and *HIGHPC to 0. */
12154 get_scope_pc_bounds (struct die_info
*die
,
12155 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
12156 struct dwarf2_cu
*cu
)
12158 CORE_ADDR best_low
= (CORE_ADDR
) -1;
12159 CORE_ADDR best_high
= (CORE_ADDR
) 0;
12160 CORE_ADDR current_low
, current_high
;
12162 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
12163 >= PC_BOUNDS_RANGES
)
12165 best_low
= current_low
;
12166 best_high
= current_high
;
12170 struct die_info
*child
= die
->child
;
12172 while (child
&& child
->tag
)
12174 switch (child
->tag
) {
12175 case DW_TAG_subprogram
:
12176 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
12178 case DW_TAG_namespace
:
12179 case DW_TAG_module
:
12180 /* FIXME: carlton/2004-01-16: Should we do this for
12181 DW_TAG_class_type/DW_TAG_structure_type, too? I think
12182 that current GCC's always emit the DIEs corresponding
12183 to definitions of methods of classes as children of a
12184 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
12185 the DIEs giving the declarations, which could be
12186 anywhere). But I don't see any reason why the
12187 standards says that they have to be there. */
12188 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
12190 if (current_low
!= ((CORE_ADDR
) -1))
12192 best_low
= std::min (best_low
, current_low
);
12193 best_high
= std::max (best_high
, current_high
);
12201 child
= sibling_die (child
);
12206 *highpc
= best_high
;
12209 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
12213 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
12214 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
12216 struct objfile
*objfile
= cu
->objfile
;
12217 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12218 struct attribute
*attr
;
12219 struct attribute
*attr_high
;
12221 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
12224 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
12227 CORE_ADDR low
= attr_value_as_address (attr
);
12228 CORE_ADDR high
= attr_value_as_address (attr_high
);
12230 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
12233 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
12234 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
12235 record_block_range (block
, low
, high
- 1);
12239 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
12242 bfd
*obfd
= objfile
->obfd
;
12243 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
12244 We take advantage of the fact that DW_AT_ranges does not appear
12245 in DW_TAG_compile_unit of DWO files. */
12246 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
12248 /* The value of the DW_AT_ranges attribute is the offset of the
12249 address range list in the .debug_ranges section. */
12250 unsigned long offset
= (DW_UNSND (attr
)
12251 + (need_ranges_base
? cu
->ranges_base
: 0));
12252 const gdb_byte
*buffer
;
12254 /* For some target architectures, but not others, the
12255 read_address function sign-extends the addresses it returns.
12256 To recognize base address selection entries, we need a
12258 unsigned int addr_size
= cu
->header
.addr_size
;
12259 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
12261 /* The base address, to which the next pair is relative. Note
12262 that this 'base' is a DWARF concept: most entries in a range
12263 list are relative, to reduce the number of relocs against the
12264 debugging information. This is separate from this function's
12265 'baseaddr' argument, which GDB uses to relocate debugging
12266 information from a shared library based on the address at
12267 which the library was loaded. */
12268 CORE_ADDR base
= cu
->base_address
;
12269 int base_known
= cu
->base_known
;
12271 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
12272 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
12274 complaint (&symfile_complaints
,
12275 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
12279 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
12283 unsigned int bytes_read
;
12284 CORE_ADDR start
, end
;
12286 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12287 buffer
+= bytes_read
;
12288 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12289 buffer
+= bytes_read
;
12291 /* Did we find the end of the range list? */
12292 if (start
== 0 && end
== 0)
12295 /* Did we find a base address selection entry? */
12296 else if ((start
& base_select_mask
) == base_select_mask
)
12302 /* We found an ordinary address range. */
12307 complaint (&symfile_complaints
,
12308 _("Invalid .debug_ranges data "
12309 "(no base address)"));
12315 /* Inverted range entries are invalid. */
12316 complaint (&symfile_complaints
,
12317 _("Invalid .debug_ranges data "
12318 "(inverted range)"));
12322 /* Empty range entries have no effect. */
12326 start
+= base
+ baseaddr
;
12327 end
+= base
+ baseaddr
;
12329 /* A not-uncommon case of bad debug info.
12330 Don't pollute the addrmap with bad data. */
12331 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12333 complaint (&symfile_complaints
,
12334 _(".debug_ranges entry has start address of zero"
12335 " [in module %s]"), objfile_name (objfile
));
12339 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
12340 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
12341 record_block_range (block
, start
, end
- 1);
12347 /* Check whether the producer field indicates either of GCC < 4.6, or the
12348 Intel C/C++ compiler, and cache the result in CU. */
12351 check_producer (struct dwarf2_cu
*cu
)
12355 if (cu
->producer
== NULL
)
12357 /* For unknown compilers expect their behavior is DWARF version
12360 GCC started to support .debug_types sections by -gdwarf-4 since
12361 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
12362 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
12363 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
12364 interpreted incorrectly by GDB now - GCC PR debug/48229. */
12366 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
12368 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
12369 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
12371 else if (startswith (cu
->producer
, "Intel(R) C"))
12372 cu
->producer_is_icc
= 1;
12375 /* For other non-GCC compilers, expect their behavior is DWARF version
12379 cu
->checked_producer
= 1;
12382 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
12383 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
12384 during 4.6.0 experimental. */
12387 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
12389 if (!cu
->checked_producer
)
12390 check_producer (cu
);
12392 return cu
->producer_is_gxx_lt_4_6
;
12395 /* Return the default accessibility type if it is not overriden by
12396 DW_AT_accessibility. */
12398 static enum dwarf_access_attribute
12399 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
12401 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
12403 /* The default DWARF 2 accessibility for members is public, the default
12404 accessibility for inheritance is private. */
12406 if (die
->tag
!= DW_TAG_inheritance
)
12407 return DW_ACCESS_public
;
12409 return DW_ACCESS_private
;
12413 /* DWARF 3+ defines the default accessibility a different way. The same
12414 rules apply now for DW_TAG_inheritance as for the members and it only
12415 depends on the container kind. */
12417 if (die
->parent
->tag
== DW_TAG_class_type
)
12418 return DW_ACCESS_private
;
12420 return DW_ACCESS_public
;
12424 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
12425 offset. If the attribute was not found return 0, otherwise return
12426 1. If it was found but could not properly be handled, set *OFFSET
12430 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
12433 struct attribute
*attr
;
12435 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
12440 /* Note that we do not check for a section offset first here.
12441 This is because DW_AT_data_member_location is new in DWARF 4,
12442 so if we see it, we can assume that a constant form is really
12443 a constant and not a section offset. */
12444 if (attr_form_is_constant (attr
))
12445 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
12446 else if (attr_form_is_section_offset (attr
))
12447 dwarf2_complex_location_expr_complaint ();
12448 else if (attr_form_is_block (attr
))
12449 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12451 dwarf2_complex_location_expr_complaint ();
12459 /* Add an aggregate field to the field list. */
12462 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
12463 struct dwarf2_cu
*cu
)
12465 struct objfile
*objfile
= cu
->objfile
;
12466 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12467 struct nextfield
*new_field
;
12468 struct attribute
*attr
;
12470 const char *fieldname
= "";
12472 /* Allocate a new field list entry and link it in. */
12473 new_field
= XNEW (struct nextfield
);
12474 make_cleanup (xfree
, new_field
);
12475 memset (new_field
, 0, sizeof (struct nextfield
));
12477 if (die
->tag
== DW_TAG_inheritance
)
12479 new_field
->next
= fip
->baseclasses
;
12480 fip
->baseclasses
= new_field
;
12484 new_field
->next
= fip
->fields
;
12485 fip
->fields
= new_field
;
12489 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
12491 new_field
->accessibility
= DW_UNSND (attr
);
12493 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
12494 if (new_field
->accessibility
!= DW_ACCESS_public
)
12495 fip
->non_public_fields
= 1;
12497 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
12499 new_field
->virtuality
= DW_UNSND (attr
);
12501 new_field
->virtuality
= DW_VIRTUALITY_none
;
12503 fp
= &new_field
->field
;
12505 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
12509 /* Data member other than a C++ static data member. */
12511 /* Get type of field. */
12512 fp
->type
= die_type (die
, cu
);
12514 SET_FIELD_BITPOS (*fp
, 0);
12516 /* Get bit size of field (zero if none). */
12517 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
12520 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
12524 FIELD_BITSIZE (*fp
) = 0;
12527 /* Get bit offset of field. */
12528 if (handle_data_member_location (die
, cu
, &offset
))
12529 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
12530 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
12533 if (gdbarch_bits_big_endian (gdbarch
))
12535 /* For big endian bits, the DW_AT_bit_offset gives the
12536 additional bit offset from the MSB of the containing
12537 anonymous object to the MSB of the field. We don't
12538 have to do anything special since we don't need to
12539 know the size of the anonymous object. */
12540 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
12544 /* For little endian bits, compute the bit offset to the
12545 MSB of the anonymous object, subtract off the number of
12546 bits from the MSB of the field to the MSB of the
12547 object, and then subtract off the number of bits of
12548 the field itself. The result is the bit offset of
12549 the LSB of the field. */
12550 int anonymous_size
;
12551 int bit_offset
= DW_UNSND (attr
);
12553 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12556 /* The size of the anonymous object containing
12557 the bit field is explicit, so use the
12558 indicated size (in bytes). */
12559 anonymous_size
= DW_UNSND (attr
);
12563 /* The size of the anonymous object containing
12564 the bit field must be inferred from the type
12565 attribute of the data member containing the
12567 anonymous_size
= TYPE_LENGTH (fp
->type
);
12569 SET_FIELD_BITPOS (*fp
,
12570 (FIELD_BITPOS (*fp
)
12571 + anonymous_size
* bits_per_byte
12572 - bit_offset
- FIELD_BITSIZE (*fp
)));
12575 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
12577 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
12578 + dwarf2_get_attr_constant_value (attr
, 0)));
12580 /* Get name of field. */
12581 fieldname
= dwarf2_name (die
, cu
);
12582 if (fieldname
== NULL
)
12585 /* The name is already allocated along with this objfile, so we don't
12586 need to duplicate it for the type. */
12587 fp
->name
= fieldname
;
12589 /* Change accessibility for artificial fields (e.g. virtual table
12590 pointer or virtual base class pointer) to private. */
12591 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
12593 FIELD_ARTIFICIAL (*fp
) = 1;
12594 new_field
->accessibility
= DW_ACCESS_private
;
12595 fip
->non_public_fields
= 1;
12598 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
12600 /* C++ static member. */
12602 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
12603 is a declaration, but all versions of G++ as of this writing
12604 (so through at least 3.2.1) incorrectly generate
12605 DW_TAG_variable tags. */
12607 const char *physname
;
12609 /* Get name of field. */
12610 fieldname
= dwarf2_name (die
, cu
);
12611 if (fieldname
== NULL
)
12614 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
12616 /* Only create a symbol if this is an external value.
12617 new_symbol checks this and puts the value in the global symbol
12618 table, which we want. If it is not external, new_symbol
12619 will try to put the value in cu->list_in_scope which is wrong. */
12620 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
12622 /* A static const member, not much different than an enum as far as
12623 we're concerned, except that we can support more types. */
12624 new_symbol (die
, NULL
, cu
);
12627 /* Get physical name. */
12628 physname
= dwarf2_physname (fieldname
, die
, cu
);
12630 /* The name is already allocated along with this objfile, so we don't
12631 need to duplicate it for the type. */
12632 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
12633 FIELD_TYPE (*fp
) = die_type (die
, cu
);
12634 FIELD_NAME (*fp
) = fieldname
;
12636 else if (die
->tag
== DW_TAG_inheritance
)
12640 /* C++ base class field. */
12641 if (handle_data_member_location (die
, cu
, &offset
))
12642 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
12643 FIELD_BITSIZE (*fp
) = 0;
12644 FIELD_TYPE (*fp
) = die_type (die
, cu
);
12645 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
12646 fip
->nbaseclasses
++;
12650 /* Add a typedef defined in the scope of the FIP's class. */
12653 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
12654 struct dwarf2_cu
*cu
)
12656 struct typedef_field_list
*new_field
;
12657 struct typedef_field
*fp
;
12659 /* Allocate a new field list entry and link it in. */
12660 new_field
= XCNEW (struct typedef_field_list
);
12661 make_cleanup (xfree
, new_field
);
12663 gdb_assert (die
->tag
== DW_TAG_typedef
);
12665 fp
= &new_field
->field
;
12667 /* Get name of field. */
12668 fp
->name
= dwarf2_name (die
, cu
);
12669 if (fp
->name
== NULL
)
12672 fp
->type
= read_type_die (die
, cu
);
12674 new_field
->next
= fip
->typedef_field_list
;
12675 fip
->typedef_field_list
= new_field
;
12676 fip
->typedef_field_list_count
++;
12679 /* Create the vector of fields, and attach it to the type. */
12682 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
12683 struct dwarf2_cu
*cu
)
12685 int nfields
= fip
->nfields
;
12687 /* Record the field count, allocate space for the array of fields,
12688 and create blank accessibility bitfields if necessary. */
12689 TYPE_NFIELDS (type
) = nfields
;
12690 TYPE_FIELDS (type
) = (struct field
*)
12691 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
12692 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
12694 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
12696 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12698 TYPE_FIELD_PRIVATE_BITS (type
) =
12699 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12700 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
12702 TYPE_FIELD_PROTECTED_BITS (type
) =
12703 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12704 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
12706 TYPE_FIELD_IGNORE_BITS (type
) =
12707 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12708 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
12711 /* If the type has baseclasses, allocate and clear a bit vector for
12712 TYPE_FIELD_VIRTUAL_BITS. */
12713 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
12715 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
12716 unsigned char *pointer
;
12718 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12719 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
12720 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
12721 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
12722 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
12725 /* Copy the saved-up fields into the field vector. Start from the head of
12726 the list, adding to the tail of the field array, so that they end up in
12727 the same order in the array in which they were added to the list. */
12728 while (nfields
-- > 0)
12730 struct nextfield
*fieldp
;
12734 fieldp
= fip
->fields
;
12735 fip
->fields
= fieldp
->next
;
12739 fieldp
= fip
->baseclasses
;
12740 fip
->baseclasses
= fieldp
->next
;
12743 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
12744 switch (fieldp
->accessibility
)
12746 case DW_ACCESS_private
:
12747 if (cu
->language
!= language_ada
)
12748 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
12751 case DW_ACCESS_protected
:
12752 if (cu
->language
!= language_ada
)
12753 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
12756 case DW_ACCESS_public
:
12760 /* Unknown accessibility. Complain and treat it as public. */
12762 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
12763 fieldp
->accessibility
);
12767 if (nfields
< fip
->nbaseclasses
)
12769 switch (fieldp
->virtuality
)
12771 case DW_VIRTUALITY_virtual
:
12772 case DW_VIRTUALITY_pure_virtual
:
12773 if (cu
->language
== language_ada
)
12774 error (_("unexpected virtuality in component of Ada type"));
12775 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
12782 /* Return true if this member function is a constructor, false
12786 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
12788 const char *fieldname
;
12789 const char *type_name
;
12792 if (die
->parent
== NULL
)
12795 if (die
->parent
->tag
!= DW_TAG_structure_type
12796 && die
->parent
->tag
!= DW_TAG_union_type
12797 && die
->parent
->tag
!= DW_TAG_class_type
)
12800 fieldname
= dwarf2_name (die
, cu
);
12801 type_name
= dwarf2_name (die
->parent
, cu
);
12802 if (fieldname
== NULL
|| type_name
== NULL
)
12805 len
= strlen (fieldname
);
12806 return (strncmp (fieldname
, type_name
, len
) == 0
12807 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
12810 /* Add a member function to the proper fieldlist. */
12813 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
12814 struct type
*type
, struct dwarf2_cu
*cu
)
12816 struct objfile
*objfile
= cu
->objfile
;
12817 struct attribute
*attr
;
12818 struct fnfieldlist
*flp
;
12820 struct fn_field
*fnp
;
12821 const char *fieldname
;
12822 struct nextfnfield
*new_fnfield
;
12823 struct type
*this_type
;
12824 enum dwarf_access_attribute accessibility
;
12826 if (cu
->language
== language_ada
)
12827 error (_("unexpected member function in Ada type"));
12829 /* Get name of member function. */
12830 fieldname
= dwarf2_name (die
, cu
);
12831 if (fieldname
== NULL
)
12834 /* Look up member function name in fieldlist. */
12835 for (i
= 0; i
< fip
->nfnfields
; i
++)
12837 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
12841 /* Create new list element if necessary. */
12842 if (i
< fip
->nfnfields
)
12843 flp
= &fip
->fnfieldlists
[i
];
12846 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
12848 fip
->fnfieldlists
= (struct fnfieldlist
*)
12849 xrealloc (fip
->fnfieldlists
,
12850 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
12851 * sizeof (struct fnfieldlist
));
12852 if (fip
->nfnfields
== 0)
12853 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
12855 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
12856 flp
->name
= fieldname
;
12859 i
= fip
->nfnfields
++;
12862 /* Create a new member function field and chain it to the field list
12864 new_fnfield
= XNEW (struct nextfnfield
);
12865 make_cleanup (xfree
, new_fnfield
);
12866 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
12867 new_fnfield
->next
= flp
->head
;
12868 flp
->head
= new_fnfield
;
12871 /* Fill in the member function field info. */
12872 fnp
= &new_fnfield
->fnfield
;
12874 /* Delay processing of the physname until later. */
12875 if (cu
->language
== language_cplus
)
12877 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
12882 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
12883 fnp
->physname
= physname
? physname
: "";
12886 fnp
->type
= alloc_type (objfile
);
12887 this_type
= read_type_die (die
, cu
);
12888 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
12890 int nparams
= TYPE_NFIELDS (this_type
);
12892 /* TYPE is the domain of this method, and THIS_TYPE is the type
12893 of the method itself (TYPE_CODE_METHOD). */
12894 smash_to_method_type (fnp
->type
, type
,
12895 TYPE_TARGET_TYPE (this_type
),
12896 TYPE_FIELDS (this_type
),
12897 TYPE_NFIELDS (this_type
),
12898 TYPE_VARARGS (this_type
));
12900 /* Handle static member functions.
12901 Dwarf2 has no clean way to discern C++ static and non-static
12902 member functions. G++ helps GDB by marking the first
12903 parameter for non-static member functions (which is the this
12904 pointer) as artificial. We obtain this information from
12905 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
12906 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
12907 fnp
->voffset
= VOFFSET_STATIC
;
12910 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
12911 dwarf2_full_name (fieldname
, die
, cu
));
12913 /* Get fcontext from DW_AT_containing_type if present. */
12914 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
12915 fnp
->fcontext
= die_containing_type (die
, cu
);
12917 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
12918 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
12920 /* Get accessibility. */
12921 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
12923 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
12925 accessibility
= dwarf2_default_access_attribute (die
, cu
);
12926 switch (accessibility
)
12928 case DW_ACCESS_private
:
12929 fnp
->is_private
= 1;
12931 case DW_ACCESS_protected
:
12932 fnp
->is_protected
= 1;
12936 /* Check for artificial methods. */
12937 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
12938 if (attr
&& DW_UNSND (attr
) != 0)
12939 fnp
->is_artificial
= 1;
12941 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
12943 /* Get index in virtual function table if it is a virtual member
12944 function. For older versions of GCC, this is an offset in the
12945 appropriate virtual table, as specified by DW_AT_containing_type.
12946 For everyone else, it is an expression to be evaluated relative
12947 to the object address. */
12949 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
12952 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
12954 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
12956 /* Old-style GCC. */
12957 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
12959 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
12960 || (DW_BLOCK (attr
)->size
> 1
12961 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
12962 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
12964 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12965 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
12966 dwarf2_complex_location_expr_complaint ();
12968 fnp
->voffset
/= cu
->header
.addr_size
;
12972 dwarf2_complex_location_expr_complaint ();
12974 if (!fnp
->fcontext
)
12976 /* If there is no `this' field and no DW_AT_containing_type,
12977 we cannot actually find a base class context for the
12979 if (TYPE_NFIELDS (this_type
) == 0
12980 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
12982 complaint (&symfile_complaints
,
12983 _("cannot determine context for virtual member "
12984 "function \"%s\" (offset %d)"),
12985 fieldname
, die
->offset
.sect_off
);
12990 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
12994 else if (attr_form_is_section_offset (attr
))
12996 dwarf2_complex_location_expr_complaint ();
13000 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
13006 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
13007 if (attr
&& DW_UNSND (attr
))
13009 /* GCC does this, as of 2008-08-25; PR debug/37237. */
13010 complaint (&symfile_complaints
,
13011 _("Member function \"%s\" (offset %d) is virtual "
13012 "but the vtable offset is not specified"),
13013 fieldname
, die
->offset
.sect_off
);
13014 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13015 TYPE_CPLUS_DYNAMIC (type
) = 1;
13020 /* Create the vector of member function fields, and attach it to the type. */
13023 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
13024 struct dwarf2_cu
*cu
)
13026 struct fnfieldlist
*flp
;
13029 if (cu
->language
== language_ada
)
13030 error (_("unexpected member functions in Ada type"));
13032 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13033 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
13034 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
13036 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
13038 struct nextfnfield
*nfp
= flp
->head
;
13039 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
13042 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
13043 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
13044 fn_flp
->fn_fields
= (struct fn_field
*)
13045 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
13046 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
13047 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
13050 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
13053 /* Returns non-zero if NAME is the name of a vtable member in CU's
13054 language, zero otherwise. */
13056 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
13058 static const char vptr
[] = "_vptr";
13059 static const char vtable
[] = "vtable";
13061 /* Look for the C++ form of the vtable. */
13062 if (startswith (name
, vptr
) && is_cplus_marker (name
[sizeof (vptr
) - 1]))
13068 /* GCC outputs unnamed structures that are really pointers to member
13069 functions, with the ABI-specified layout. If TYPE describes
13070 such a structure, smash it into a member function type.
13072 GCC shouldn't do this; it should just output pointer to member DIEs.
13073 This is GCC PR debug/28767. */
13076 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
13078 struct type
*pfn_type
, *self_type
, *new_type
;
13080 /* Check for a structure with no name and two children. */
13081 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
13084 /* Check for __pfn and __delta members. */
13085 if (TYPE_FIELD_NAME (type
, 0) == NULL
13086 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
13087 || TYPE_FIELD_NAME (type
, 1) == NULL
13088 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
13091 /* Find the type of the method. */
13092 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
13093 if (pfn_type
== NULL
13094 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
13095 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
13098 /* Look for the "this" argument. */
13099 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
13100 if (TYPE_NFIELDS (pfn_type
) == 0
13101 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
13102 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
13105 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
13106 new_type
= alloc_type (objfile
);
13107 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
13108 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
13109 TYPE_VARARGS (pfn_type
));
13110 smash_to_methodptr_type (type
, new_type
);
13113 /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler
13117 producer_is_icc (struct dwarf2_cu
*cu
)
13119 if (!cu
->checked_producer
)
13120 check_producer (cu
);
13122 return cu
->producer_is_icc
;
13125 /* Called when we find the DIE that starts a structure or union scope
13126 (definition) to create a type for the structure or union. Fill in
13127 the type's name and general properties; the members will not be
13128 processed until process_structure_scope. A symbol table entry for
13129 the type will also not be done until process_structure_scope (assuming
13130 the type has a name).
13132 NOTE: we need to call these functions regardless of whether or not the
13133 DIE has a DW_AT_name attribute, since it might be an anonymous
13134 structure or union. This gets the type entered into our set of
13135 user defined types. */
13137 static struct type
*
13138 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13140 struct objfile
*objfile
= cu
->objfile
;
13142 struct attribute
*attr
;
13145 /* If the definition of this type lives in .debug_types, read that type.
13146 Don't follow DW_AT_specification though, that will take us back up
13147 the chain and we want to go down. */
13148 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
13151 type
= get_DW_AT_signature_type (die
, attr
, cu
);
13153 /* The type's CU may not be the same as CU.
13154 Ensure TYPE is recorded with CU in die_type_hash. */
13155 return set_die_type (die
, type
, cu
);
13158 type
= alloc_type (objfile
);
13159 INIT_CPLUS_SPECIFIC (type
);
13161 name
= dwarf2_name (die
, cu
);
13164 if (cu
->language
== language_cplus
13165 || cu
->language
== language_d
13166 || cu
->language
== language_rust
)
13168 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
13170 /* dwarf2_full_name might have already finished building the DIE's
13171 type. If so, there is no need to continue. */
13172 if (get_die_type (die
, cu
) != NULL
)
13173 return get_die_type (die
, cu
);
13175 TYPE_TAG_NAME (type
) = full_name
;
13176 if (die
->tag
== DW_TAG_structure_type
13177 || die
->tag
== DW_TAG_class_type
)
13178 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
13182 /* The name is already allocated along with this objfile, so
13183 we don't need to duplicate it for the type. */
13184 TYPE_TAG_NAME (type
) = name
;
13185 if (die
->tag
== DW_TAG_class_type
)
13186 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
13190 if (die
->tag
== DW_TAG_structure_type
)
13192 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13194 else if (die
->tag
== DW_TAG_union_type
)
13196 TYPE_CODE (type
) = TYPE_CODE_UNION
;
13200 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13203 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
13204 TYPE_DECLARED_CLASS (type
) = 1;
13206 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13209 if (attr_form_is_constant (attr
))
13210 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13213 /* For the moment, dynamic type sizes are not supported
13214 by GDB's struct type. The actual size is determined
13215 on-demand when resolving the type of a given object,
13216 so set the type's length to zero for now. Otherwise,
13217 we record an expression as the length, and that expression
13218 could lead to a very large value, which could eventually
13219 lead to us trying to allocate that much memory when creating
13220 a value of that type. */
13221 TYPE_LENGTH (type
) = 0;
13226 TYPE_LENGTH (type
) = 0;
13229 if (producer_is_icc (cu
) && (TYPE_LENGTH (type
) == 0))
13231 /* ICC does not output the required DW_AT_declaration
13232 on incomplete types, but gives them a size of zero. */
13233 TYPE_STUB (type
) = 1;
13236 TYPE_STUB_SUPPORTED (type
) = 1;
13238 if (die_is_declaration (die
, cu
))
13239 TYPE_STUB (type
) = 1;
13240 else if (attr
== NULL
&& die
->child
== NULL
13241 && producer_is_realview (cu
->producer
))
13242 /* RealView does not output the required DW_AT_declaration
13243 on incomplete types. */
13244 TYPE_STUB (type
) = 1;
13246 /* We need to add the type field to the die immediately so we don't
13247 infinitely recurse when dealing with pointers to the structure
13248 type within the structure itself. */
13249 set_die_type (die
, type
, cu
);
13251 /* set_die_type should be already done. */
13252 set_descriptive_type (type
, die
, cu
);
13257 /* Finish creating a structure or union type, including filling in
13258 its members and creating a symbol for it. */
13261 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13263 struct objfile
*objfile
= cu
->objfile
;
13264 struct die_info
*child_die
;
13267 type
= get_die_type (die
, cu
);
13269 type
= read_structure_type (die
, cu
);
13271 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
13273 struct field_info fi
;
13274 VEC (symbolp
) *template_args
= NULL
;
13275 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
13277 memset (&fi
, 0, sizeof (struct field_info
));
13279 child_die
= die
->child
;
13281 while (child_die
&& child_die
->tag
)
13283 if (child_die
->tag
== DW_TAG_member
13284 || child_die
->tag
== DW_TAG_variable
)
13286 /* NOTE: carlton/2002-11-05: A C++ static data member
13287 should be a DW_TAG_member that is a declaration, but
13288 all versions of G++ as of this writing (so through at
13289 least 3.2.1) incorrectly generate DW_TAG_variable
13290 tags for them instead. */
13291 dwarf2_add_field (&fi
, child_die
, cu
);
13293 else if (child_die
->tag
== DW_TAG_subprogram
)
13295 /* Rust doesn't have member functions in the C++ sense.
13296 However, it does emit ordinary functions as children
13297 of a struct DIE. */
13298 if (cu
->language
== language_rust
)
13299 read_func_scope (child_die
, cu
);
13302 /* C++ member function. */
13303 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
13306 else if (child_die
->tag
== DW_TAG_inheritance
)
13308 /* C++ base class field. */
13309 dwarf2_add_field (&fi
, child_die
, cu
);
13311 else if (child_die
->tag
== DW_TAG_typedef
)
13312 dwarf2_add_typedef (&fi
, child_die
, cu
);
13313 else if (child_die
->tag
== DW_TAG_template_type_param
13314 || child_die
->tag
== DW_TAG_template_value_param
)
13316 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13319 VEC_safe_push (symbolp
, template_args
, arg
);
13322 child_die
= sibling_die (child_die
);
13325 /* Attach template arguments to type. */
13326 if (! VEC_empty (symbolp
, template_args
))
13328 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13329 TYPE_N_TEMPLATE_ARGUMENTS (type
)
13330 = VEC_length (symbolp
, template_args
);
13331 TYPE_TEMPLATE_ARGUMENTS (type
)
13332 = XOBNEWVEC (&objfile
->objfile_obstack
,
13334 TYPE_N_TEMPLATE_ARGUMENTS (type
));
13335 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
13336 VEC_address (symbolp
, template_args
),
13337 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
13338 * sizeof (struct symbol
*)));
13339 VEC_free (symbolp
, template_args
);
13342 /* Attach fields and member functions to the type. */
13344 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
13347 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
13349 /* Get the type which refers to the base class (possibly this
13350 class itself) which contains the vtable pointer for the current
13351 class from the DW_AT_containing_type attribute. This use of
13352 DW_AT_containing_type is a GNU extension. */
13354 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
13356 struct type
*t
= die_containing_type (die
, cu
);
13358 set_type_vptr_basetype (type
, t
);
13363 /* Our own class provides vtbl ptr. */
13364 for (i
= TYPE_NFIELDS (t
) - 1;
13365 i
>= TYPE_N_BASECLASSES (t
);
13368 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
13370 if (is_vtable_name (fieldname
, cu
))
13372 set_type_vptr_fieldno (type
, i
);
13377 /* Complain if virtual function table field not found. */
13378 if (i
< TYPE_N_BASECLASSES (t
))
13379 complaint (&symfile_complaints
,
13380 _("virtual function table pointer "
13381 "not found when defining class '%s'"),
13382 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
13387 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
13390 else if (cu
->producer
13391 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
13393 /* The IBM XLC compiler does not provide direct indication
13394 of the containing type, but the vtable pointer is
13395 always named __vfp. */
13399 for (i
= TYPE_NFIELDS (type
) - 1;
13400 i
>= TYPE_N_BASECLASSES (type
);
13403 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
13405 set_type_vptr_fieldno (type
, i
);
13406 set_type_vptr_basetype (type
, type
);
13413 /* Copy fi.typedef_field_list linked list elements content into the
13414 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
13415 if (fi
.typedef_field_list
)
13417 int i
= fi
.typedef_field_list_count
;
13419 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13420 TYPE_TYPEDEF_FIELD_ARRAY (type
)
13421 = ((struct typedef_field
*)
13422 TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
));
13423 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
13425 /* Reverse the list order to keep the debug info elements order. */
13428 struct typedef_field
*dest
, *src
;
13430 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
13431 src
= &fi
.typedef_field_list
->field
;
13432 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
13437 do_cleanups (back_to
);
13440 quirk_gcc_member_function_pointer (type
, objfile
);
13442 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
13443 snapshots) has been known to create a die giving a declaration
13444 for a class that has, as a child, a die giving a definition for a
13445 nested class. So we have to process our children even if the
13446 current die is a declaration. Normally, of course, a declaration
13447 won't have any children at all. */
13449 child_die
= die
->child
;
13451 while (child_die
!= NULL
&& child_die
->tag
)
13453 if (child_die
->tag
== DW_TAG_member
13454 || child_die
->tag
== DW_TAG_variable
13455 || child_die
->tag
== DW_TAG_inheritance
13456 || child_die
->tag
== DW_TAG_template_value_param
13457 || child_die
->tag
== DW_TAG_template_type_param
)
13462 process_die (child_die
, cu
);
13464 child_die
= sibling_die (child_die
);
13467 /* Do not consider external references. According to the DWARF standard,
13468 these DIEs are identified by the fact that they have no byte_size
13469 attribute, and a declaration attribute. */
13470 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
13471 || !die_is_declaration (die
, cu
))
13472 new_symbol (die
, type
, cu
);
13475 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
13476 update TYPE using some information only available in DIE's children. */
13479 update_enumeration_type_from_children (struct die_info
*die
,
13481 struct dwarf2_cu
*cu
)
13483 struct obstack obstack
;
13484 struct die_info
*child_die
;
13485 int unsigned_enum
= 1;
13488 struct cleanup
*old_chain
;
13490 obstack_init (&obstack
);
13491 old_chain
= make_cleanup_obstack_free (&obstack
);
13493 for (child_die
= die
->child
;
13494 child_die
!= NULL
&& child_die
->tag
;
13495 child_die
= sibling_die (child_die
))
13497 struct attribute
*attr
;
13499 const gdb_byte
*bytes
;
13500 struct dwarf2_locexpr_baton
*baton
;
13503 if (child_die
->tag
!= DW_TAG_enumerator
)
13506 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
13510 name
= dwarf2_name (child_die
, cu
);
13512 name
= "<anonymous enumerator>";
13514 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
13515 &value
, &bytes
, &baton
);
13521 else if ((mask
& value
) != 0)
13526 /* If we already know that the enum type is neither unsigned, nor
13527 a flag type, no need to look at the rest of the enumerates. */
13528 if (!unsigned_enum
&& !flag_enum
)
13533 TYPE_UNSIGNED (type
) = 1;
13535 TYPE_FLAG_ENUM (type
) = 1;
13537 do_cleanups (old_chain
);
13540 /* Given a DW_AT_enumeration_type die, set its type. We do not
13541 complete the type's fields yet, or create any symbols. */
13543 static struct type
*
13544 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13546 struct objfile
*objfile
= cu
->objfile
;
13548 struct attribute
*attr
;
13551 /* If the definition of this type lives in .debug_types, read that type.
13552 Don't follow DW_AT_specification though, that will take us back up
13553 the chain and we want to go down. */
13554 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
13557 type
= get_DW_AT_signature_type (die
, attr
, cu
);
13559 /* The type's CU may not be the same as CU.
13560 Ensure TYPE is recorded with CU in die_type_hash. */
13561 return set_die_type (die
, type
, cu
);
13564 type
= alloc_type (objfile
);
13566 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
13567 name
= dwarf2_full_name (NULL
, die
, cu
);
13569 TYPE_TAG_NAME (type
) = name
;
13571 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
13574 struct type
*underlying_type
= die_type (die
, cu
);
13576 TYPE_TARGET_TYPE (type
) = underlying_type
;
13579 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13582 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13586 TYPE_LENGTH (type
) = 0;
13589 /* The enumeration DIE can be incomplete. In Ada, any type can be
13590 declared as private in the package spec, and then defined only
13591 inside the package body. Such types are known as Taft Amendment
13592 Types. When another package uses such a type, an incomplete DIE
13593 may be generated by the compiler. */
13594 if (die_is_declaration (die
, cu
))
13595 TYPE_STUB (type
) = 1;
13597 /* Finish the creation of this type by using the enum's children.
13598 We must call this even when the underlying type has been provided
13599 so that we can determine if we're looking at a "flag" enum. */
13600 update_enumeration_type_from_children (die
, type
, cu
);
13602 /* If this type has an underlying type that is not a stub, then we
13603 may use its attributes. We always use the "unsigned" attribute
13604 in this situation, because ordinarily we guess whether the type
13605 is unsigned -- but the guess can be wrong and the underlying type
13606 can tell us the reality. However, we defer to a local size
13607 attribute if one exists, because this lets the compiler override
13608 the underlying type if needed. */
13609 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
13611 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
13612 if (TYPE_LENGTH (type
) == 0)
13613 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
13616 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
13618 return set_die_type (die
, type
, cu
);
13621 /* Given a pointer to a die which begins an enumeration, process all
13622 the dies that define the members of the enumeration, and create the
13623 symbol for the enumeration type.
13625 NOTE: We reverse the order of the element list. */
13628 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13630 struct type
*this_type
;
13632 this_type
= get_die_type (die
, cu
);
13633 if (this_type
== NULL
)
13634 this_type
= read_enumeration_type (die
, cu
);
13636 if (die
->child
!= NULL
)
13638 struct die_info
*child_die
;
13639 struct symbol
*sym
;
13640 struct field
*fields
= NULL
;
13641 int num_fields
= 0;
13644 child_die
= die
->child
;
13645 while (child_die
&& child_die
->tag
)
13647 if (child_die
->tag
!= DW_TAG_enumerator
)
13649 process_die (child_die
, cu
);
13653 name
= dwarf2_name (child_die
, cu
);
13656 sym
= new_symbol (child_die
, this_type
, cu
);
13658 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
13660 fields
= (struct field
*)
13662 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
13663 * sizeof (struct field
));
13666 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
13667 FIELD_TYPE (fields
[num_fields
]) = NULL
;
13668 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
13669 FIELD_BITSIZE (fields
[num_fields
]) = 0;
13675 child_die
= sibling_die (child_die
);
13680 TYPE_NFIELDS (this_type
) = num_fields
;
13681 TYPE_FIELDS (this_type
) = (struct field
*)
13682 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
13683 memcpy (TYPE_FIELDS (this_type
), fields
,
13684 sizeof (struct field
) * num_fields
);
13689 /* If we are reading an enum from a .debug_types unit, and the enum
13690 is a declaration, and the enum is not the signatured type in the
13691 unit, then we do not want to add a symbol for it. Adding a
13692 symbol would in some cases obscure the true definition of the
13693 enum, giving users an incomplete type when the definition is
13694 actually available. Note that we do not want to do this for all
13695 enums which are just declarations, because C++0x allows forward
13696 enum declarations. */
13697 if (cu
->per_cu
->is_debug_types
13698 && die_is_declaration (die
, cu
))
13700 struct signatured_type
*sig_type
;
13702 sig_type
= (struct signatured_type
*) cu
->per_cu
;
13703 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
13704 if (sig_type
->type_offset_in_section
.sect_off
!= die
->offset
.sect_off
)
13708 new_symbol (die
, this_type
, cu
);
13711 /* Extract all information from a DW_TAG_array_type DIE and put it in
13712 the DIE's type field. For now, this only handles one dimensional
13715 static struct type
*
13716 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13718 struct objfile
*objfile
= cu
->objfile
;
13719 struct die_info
*child_die
;
13721 struct type
*element_type
, *range_type
, *index_type
;
13722 struct type
**range_types
= NULL
;
13723 struct attribute
*attr
;
13725 struct cleanup
*back_to
;
13727 unsigned int bit_stride
= 0;
13729 element_type
= die_type (die
, cu
);
13731 /* The die_type call above may have already set the type for this DIE. */
13732 type
= get_die_type (die
, cu
);
13736 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
13738 bit_stride
= DW_UNSND (attr
) * 8;
13740 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
13742 bit_stride
= DW_UNSND (attr
);
13744 /* Irix 6.2 native cc creates array types without children for
13745 arrays with unspecified length. */
13746 if (die
->child
== NULL
)
13748 index_type
= objfile_type (objfile
)->builtin_int
;
13749 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
13750 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
13752 return set_die_type (die
, type
, cu
);
13755 back_to
= make_cleanup (null_cleanup
, NULL
);
13756 child_die
= die
->child
;
13757 while (child_die
&& child_die
->tag
)
13759 if (child_die
->tag
== DW_TAG_subrange_type
)
13761 struct type
*child_type
= read_type_die (child_die
, cu
);
13763 if (child_type
!= NULL
)
13765 /* The range type was succesfully read. Save it for the
13766 array type creation. */
13767 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
13769 range_types
= (struct type
**)
13770 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
13771 * sizeof (struct type
*));
13773 make_cleanup (free_current_contents
, &range_types
);
13775 range_types
[ndim
++] = child_type
;
13778 child_die
= sibling_die (child_die
);
13781 /* Dwarf2 dimensions are output from left to right, create the
13782 necessary array types in backwards order. */
13784 type
= element_type
;
13786 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
13791 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
13797 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
13801 /* Understand Dwarf2 support for vector types (like they occur on
13802 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
13803 array type. This is not part of the Dwarf2/3 standard yet, but a
13804 custom vendor extension. The main difference between a regular
13805 array and the vector variant is that vectors are passed by value
13807 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
13809 make_vector_type (type
);
13811 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
13812 implementation may choose to implement triple vectors using this
13814 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13817 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
13818 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13820 complaint (&symfile_complaints
,
13821 _("DW_AT_byte_size for array type smaller "
13822 "than the total size of elements"));
13825 name
= dwarf2_name (die
, cu
);
13827 TYPE_NAME (type
) = name
;
13829 /* Install the type in the die. */
13830 set_die_type (die
, type
, cu
);
13832 /* set_die_type should be already done. */
13833 set_descriptive_type (type
, die
, cu
);
13835 do_cleanups (back_to
);
13840 static enum dwarf_array_dim_ordering
13841 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
13843 struct attribute
*attr
;
13845 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
13848 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
13850 /* GNU F77 is a special case, as at 08/2004 array type info is the
13851 opposite order to the dwarf2 specification, but data is still
13852 laid out as per normal fortran.
13854 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
13855 version checking. */
13857 if (cu
->language
== language_fortran
13858 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
13860 return DW_ORD_row_major
;
13863 switch (cu
->language_defn
->la_array_ordering
)
13865 case array_column_major
:
13866 return DW_ORD_col_major
;
13867 case array_row_major
:
13869 return DW_ORD_row_major
;
13873 /* Extract all information from a DW_TAG_set_type DIE and put it in
13874 the DIE's type field. */
13876 static struct type
*
13877 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13879 struct type
*domain_type
, *set_type
;
13880 struct attribute
*attr
;
13882 domain_type
= die_type (die
, cu
);
13884 /* The die_type call above may have already set the type for this DIE. */
13885 set_type
= get_die_type (die
, cu
);
13889 set_type
= create_set_type (NULL
, domain_type
);
13891 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13893 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
13895 return set_die_type (die
, set_type
, cu
);
13898 /* A helper for read_common_block that creates a locexpr baton.
13899 SYM is the symbol which we are marking as computed.
13900 COMMON_DIE is the DIE for the common block.
13901 COMMON_LOC is the location expression attribute for the common
13903 MEMBER_LOC is the location expression attribute for the particular
13904 member of the common block that we are processing.
13905 CU is the CU from which the above come. */
13908 mark_common_block_symbol_computed (struct symbol
*sym
,
13909 struct die_info
*common_die
,
13910 struct attribute
*common_loc
,
13911 struct attribute
*member_loc
,
13912 struct dwarf2_cu
*cu
)
13914 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13915 struct dwarf2_locexpr_baton
*baton
;
13917 unsigned int cu_off
;
13918 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
13919 LONGEST offset
= 0;
13921 gdb_assert (common_loc
&& member_loc
);
13922 gdb_assert (attr_form_is_block (common_loc
));
13923 gdb_assert (attr_form_is_block (member_loc
)
13924 || attr_form_is_constant (member_loc
));
13926 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
13927 baton
->per_cu
= cu
->per_cu
;
13928 gdb_assert (baton
->per_cu
);
13930 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
13932 if (attr_form_is_constant (member_loc
))
13934 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
13935 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
13938 baton
->size
+= DW_BLOCK (member_loc
)->size
;
13940 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
13943 *ptr
++ = DW_OP_call4
;
13944 cu_off
= common_die
->offset
.sect_off
- cu
->per_cu
->offset
.sect_off
;
13945 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
13948 if (attr_form_is_constant (member_loc
))
13950 *ptr
++ = DW_OP_addr
;
13951 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
13952 ptr
+= cu
->header
.addr_size
;
13956 /* We have to copy the data here, because DW_OP_call4 will only
13957 use a DW_AT_location attribute. */
13958 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
13959 ptr
+= DW_BLOCK (member_loc
)->size
;
13962 *ptr
++ = DW_OP_plus
;
13963 gdb_assert (ptr
- baton
->data
== baton
->size
);
13965 SYMBOL_LOCATION_BATON (sym
) = baton
;
13966 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
13969 /* Create appropriate locally-scoped variables for all the
13970 DW_TAG_common_block entries. Also create a struct common_block
13971 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
13972 is used to sepate the common blocks name namespace from regular
13976 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
13978 struct attribute
*attr
;
13980 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
13983 /* Support the .debug_loc offsets. */
13984 if (attr_form_is_block (attr
))
13988 else if (attr_form_is_section_offset (attr
))
13990 dwarf2_complex_location_expr_complaint ();
13995 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
13996 "common block member");
14001 if (die
->child
!= NULL
)
14003 struct objfile
*objfile
= cu
->objfile
;
14004 struct die_info
*child_die
;
14005 size_t n_entries
= 0, size
;
14006 struct common_block
*common_block
;
14007 struct symbol
*sym
;
14009 for (child_die
= die
->child
;
14010 child_die
&& child_die
->tag
;
14011 child_die
= sibling_die (child_die
))
14014 size
= (sizeof (struct common_block
)
14015 + (n_entries
- 1) * sizeof (struct symbol
*));
14017 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
14019 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
14020 common_block
->n_entries
= 0;
14022 for (child_die
= die
->child
;
14023 child_die
&& child_die
->tag
;
14024 child_die
= sibling_die (child_die
))
14026 /* Create the symbol in the DW_TAG_common_block block in the current
14028 sym
= new_symbol (child_die
, NULL
, cu
);
14031 struct attribute
*member_loc
;
14033 common_block
->contents
[common_block
->n_entries
++] = sym
;
14035 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
14039 /* GDB has handled this for a long time, but it is
14040 not specified by DWARF. It seems to have been
14041 emitted by gfortran at least as recently as:
14042 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
14043 complaint (&symfile_complaints
,
14044 _("Variable in common block has "
14045 "DW_AT_data_member_location "
14046 "- DIE at 0x%x [in module %s]"),
14047 child_die
->offset
.sect_off
,
14048 objfile_name (cu
->objfile
));
14050 if (attr_form_is_section_offset (member_loc
))
14051 dwarf2_complex_location_expr_complaint ();
14052 else if (attr_form_is_constant (member_loc
)
14053 || attr_form_is_block (member_loc
))
14056 mark_common_block_symbol_computed (sym
, die
, attr
,
14060 dwarf2_complex_location_expr_complaint ();
14065 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
14066 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
14070 /* Create a type for a C++ namespace. */
14072 static struct type
*
14073 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14075 struct objfile
*objfile
= cu
->objfile
;
14076 const char *previous_prefix
, *name
;
14080 /* For extensions, reuse the type of the original namespace. */
14081 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
14083 struct die_info
*ext_die
;
14084 struct dwarf2_cu
*ext_cu
= cu
;
14086 ext_die
= dwarf2_extension (die
, &ext_cu
);
14087 type
= read_type_die (ext_die
, ext_cu
);
14089 /* EXT_CU may not be the same as CU.
14090 Ensure TYPE is recorded with CU in die_type_hash. */
14091 return set_die_type (die
, type
, cu
);
14094 name
= namespace_name (die
, &is_anonymous
, cu
);
14096 /* Now build the name of the current namespace. */
14098 previous_prefix
= determine_prefix (die
, cu
);
14099 if (previous_prefix
[0] != '\0')
14100 name
= typename_concat (&objfile
->objfile_obstack
,
14101 previous_prefix
, name
, 0, cu
);
14103 /* Create the type. */
14104 type
= init_type (objfile
, TYPE_CODE_NAMESPACE
, 0, name
);
14105 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
14107 return set_die_type (die
, type
, cu
);
14110 /* Read a namespace scope. */
14113 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
14115 struct objfile
*objfile
= cu
->objfile
;
14118 /* Add a symbol associated to this if we haven't seen the namespace
14119 before. Also, add a using directive if it's an anonymous
14122 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
14126 type
= read_type_die (die
, cu
);
14127 new_symbol (die
, type
, cu
);
14129 namespace_name (die
, &is_anonymous
, cu
);
14132 const char *previous_prefix
= determine_prefix (die
, cu
);
14134 add_using_directive (using_directives (cu
->language
),
14135 previous_prefix
, TYPE_NAME (type
), NULL
,
14136 NULL
, NULL
, 0, &objfile
->objfile_obstack
);
14140 if (die
->child
!= NULL
)
14142 struct die_info
*child_die
= die
->child
;
14144 while (child_die
&& child_die
->tag
)
14146 process_die (child_die
, cu
);
14147 child_die
= sibling_die (child_die
);
14152 /* Read a Fortran module as type. This DIE can be only a declaration used for
14153 imported module. Still we need that type as local Fortran "use ... only"
14154 declaration imports depend on the created type in determine_prefix. */
14156 static struct type
*
14157 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14159 struct objfile
*objfile
= cu
->objfile
;
14160 const char *module_name
;
14163 module_name
= dwarf2_name (die
, cu
);
14165 complaint (&symfile_complaints
,
14166 _("DW_TAG_module has no name, offset 0x%x"),
14167 die
->offset
.sect_off
);
14168 type
= init_type (objfile
, TYPE_CODE_MODULE
, 0, module_name
);
14170 /* determine_prefix uses TYPE_TAG_NAME. */
14171 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
14173 return set_die_type (die
, type
, cu
);
14176 /* Read a Fortran module. */
14179 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
14181 struct die_info
*child_die
= die
->child
;
14184 type
= read_type_die (die
, cu
);
14185 new_symbol (die
, type
, cu
);
14187 while (child_die
&& child_die
->tag
)
14189 process_die (child_die
, cu
);
14190 child_die
= sibling_die (child_die
);
14194 /* Return the name of the namespace represented by DIE. Set
14195 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
14198 static const char *
14199 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
14201 struct die_info
*current_die
;
14202 const char *name
= NULL
;
14204 /* Loop through the extensions until we find a name. */
14206 for (current_die
= die
;
14207 current_die
!= NULL
;
14208 current_die
= dwarf2_extension (die
, &cu
))
14210 /* We don't use dwarf2_name here so that we can detect the absence
14211 of a name -> anonymous namespace. */
14212 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
14218 /* Is it an anonymous namespace? */
14220 *is_anonymous
= (name
== NULL
);
14222 name
= CP_ANONYMOUS_NAMESPACE_STR
;
14227 /* Extract all information from a DW_TAG_pointer_type DIE and add to
14228 the user defined type vector. */
14230 static struct type
*
14231 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14233 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
14234 struct comp_unit_head
*cu_header
= &cu
->header
;
14236 struct attribute
*attr_byte_size
;
14237 struct attribute
*attr_address_class
;
14238 int byte_size
, addr_class
;
14239 struct type
*target_type
;
14241 target_type
= die_type (die
, cu
);
14243 /* The die_type call above may have already set the type for this DIE. */
14244 type
= get_die_type (die
, cu
);
14248 type
= lookup_pointer_type (target_type
);
14250 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14251 if (attr_byte_size
)
14252 byte_size
= DW_UNSND (attr_byte_size
);
14254 byte_size
= cu_header
->addr_size
;
14256 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
14257 if (attr_address_class
)
14258 addr_class
= DW_UNSND (attr_address_class
);
14260 addr_class
= DW_ADDR_none
;
14262 /* If the pointer size or address class is different than the
14263 default, create a type variant marked as such and set the
14264 length accordingly. */
14265 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
14267 if (gdbarch_address_class_type_flags_p (gdbarch
))
14271 type_flags
= gdbarch_address_class_type_flags
14272 (gdbarch
, byte_size
, addr_class
);
14273 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
14275 type
= make_type_with_address_space (type
, type_flags
);
14277 else if (TYPE_LENGTH (type
) != byte_size
)
14279 complaint (&symfile_complaints
,
14280 _("invalid pointer size %d"), byte_size
);
14284 /* Should we also complain about unhandled address classes? */
14288 TYPE_LENGTH (type
) = byte_size
;
14289 return set_die_type (die
, type
, cu
);
14292 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
14293 the user defined type vector. */
14295 static struct type
*
14296 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14299 struct type
*to_type
;
14300 struct type
*domain
;
14302 to_type
= die_type (die
, cu
);
14303 domain
= die_containing_type (die
, cu
);
14305 /* The calls above may have already set the type for this DIE. */
14306 type
= get_die_type (die
, cu
);
14310 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
14311 type
= lookup_methodptr_type (to_type
);
14312 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
14314 struct type
*new_type
= alloc_type (cu
->objfile
);
14316 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
14317 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
14318 TYPE_VARARGS (to_type
));
14319 type
= lookup_methodptr_type (new_type
);
14322 type
= lookup_memberptr_type (to_type
, domain
);
14324 return set_die_type (die
, type
, cu
);
14327 /* Extract all information from a DW_TAG_reference_type DIE and add to
14328 the user defined type vector. */
14330 static struct type
*
14331 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14333 struct comp_unit_head
*cu_header
= &cu
->header
;
14334 struct type
*type
, *target_type
;
14335 struct attribute
*attr
;
14337 target_type
= die_type (die
, cu
);
14339 /* The die_type call above may have already set the type for this DIE. */
14340 type
= get_die_type (die
, cu
);
14344 type
= lookup_reference_type (target_type
);
14345 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14348 TYPE_LENGTH (type
) = DW_UNSND (attr
);
14352 TYPE_LENGTH (type
) = cu_header
->addr_size
;
14354 return set_die_type (die
, type
, cu
);
14357 /* Add the given cv-qualifiers to the element type of the array. GCC
14358 outputs DWARF type qualifiers that apply to an array, not the
14359 element type. But GDB relies on the array element type to carry
14360 the cv-qualifiers. This mimics section 6.7.3 of the C99
14363 static struct type
*
14364 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
14365 struct type
*base_type
, int cnst
, int voltl
)
14367 struct type
*el_type
, *inner_array
;
14369 base_type
= copy_type (base_type
);
14370 inner_array
= base_type
;
14372 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
14374 TYPE_TARGET_TYPE (inner_array
) =
14375 copy_type (TYPE_TARGET_TYPE (inner_array
));
14376 inner_array
= TYPE_TARGET_TYPE (inner_array
);
14379 el_type
= TYPE_TARGET_TYPE (inner_array
);
14380 cnst
|= TYPE_CONST (el_type
);
14381 voltl
|= TYPE_VOLATILE (el_type
);
14382 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
14384 return set_die_type (die
, base_type
, cu
);
14387 static struct type
*
14388 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14390 struct type
*base_type
, *cv_type
;
14392 base_type
= die_type (die
, cu
);
14394 /* The die_type call above may have already set the type for this DIE. */
14395 cv_type
= get_die_type (die
, cu
);
14399 /* In case the const qualifier is applied to an array type, the element type
14400 is so qualified, not the array type (section 6.7.3 of C99). */
14401 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14402 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
14404 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
14405 return set_die_type (die
, cv_type
, cu
);
14408 static struct type
*
14409 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14411 struct type
*base_type
, *cv_type
;
14413 base_type
= die_type (die
, cu
);
14415 /* The die_type call above may have already set the type for this DIE. */
14416 cv_type
= get_die_type (die
, cu
);
14420 /* In case the volatile qualifier is applied to an array type, the
14421 element type is so qualified, not the array type (section 6.7.3
14423 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14424 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
14426 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
14427 return set_die_type (die
, cv_type
, cu
);
14430 /* Handle DW_TAG_restrict_type. */
14432 static struct type
*
14433 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14435 struct type
*base_type
, *cv_type
;
14437 base_type
= die_type (die
, cu
);
14439 /* The die_type call above may have already set the type for this DIE. */
14440 cv_type
= get_die_type (die
, cu
);
14444 cv_type
= make_restrict_type (base_type
);
14445 return set_die_type (die
, cv_type
, cu
);
14448 /* Handle DW_TAG_atomic_type. */
14450 static struct type
*
14451 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14453 struct type
*base_type
, *cv_type
;
14455 base_type
= die_type (die
, cu
);
14457 /* The die_type call above may have already set the type for this DIE. */
14458 cv_type
= get_die_type (die
, cu
);
14462 cv_type
= make_atomic_type (base_type
);
14463 return set_die_type (die
, cv_type
, cu
);
14466 /* Extract all information from a DW_TAG_string_type DIE and add to
14467 the user defined type vector. It isn't really a user defined type,
14468 but it behaves like one, with other DIE's using an AT_user_def_type
14469 attribute to reference it. */
14471 static struct type
*
14472 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14474 struct objfile
*objfile
= cu
->objfile
;
14475 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14476 struct type
*type
, *range_type
, *index_type
, *char_type
;
14477 struct attribute
*attr
;
14478 unsigned int length
;
14480 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
14483 length
= DW_UNSND (attr
);
14487 /* Check for the DW_AT_byte_size attribute. */
14488 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14491 length
= DW_UNSND (attr
);
14499 index_type
= objfile_type (objfile
)->builtin_int
;
14500 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
14501 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
14502 type
= create_string_type (NULL
, char_type
, range_type
);
14504 return set_die_type (die
, type
, cu
);
14507 /* Assuming that DIE corresponds to a function, returns nonzero
14508 if the function is prototyped. */
14511 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
14513 struct attribute
*attr
;
14515 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
14516 if (attr
&& (DW_UNSND (attr
) != 0))
14519 /* The DWARF standard implies that the DW_AT_prototyped attribute
14520 is only meaninful for C, but the concept also extends to other
14521 languages that allow unprototyped functions (Eg: Objective C).
14522 For all other languages, assume that functions are always
14524 if (cu
->language
!= language_c
14525 && cu
->language
!= language_objc
14526 && cu
->language
!= language_opencl
)
14529 /* RealView does not emit DW_AT_prototyped. We can not distinguish
14530 prototyped and unprototyped functions; default to prototyped,
14531 since that is more common in modern code (and RealView warns
14532 about unprototyped functions). */
14533 if (producer_is_realview (cu
->producer
))
14539 /* Handle DIES due to C code like:
14543 int (*funcp)(int a, long l);
14547 ('funcp' generates a DW_TAG_subroutine_type DIE). */
14549 static struct type
*
14550 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14552 struct objfile
*objfile
= cu
->objfile
;
14553 struct type
*type
; /* Type that this function returns. */
14554 struct type
*ftype
; /* Function that returns above type. */
14555 struct attribute
*attr
;
14557 type
= die_type (die
, cu
);
14559 /* The die_type call above may have already set the type for this DIE. */
14560 ftype
= get_die_type (die
, cu
);
14564 ftype
= lookup_function_type (type
);
14566 if (prototyped_function_p (die
, cu
))
14567 TYPE_PROTOTYPED (ftype
) = 1;
14569 /* Store the calling convention in the type if it's available in
14570 the subroutine die. Otherwise set the calling convention to
14571 the default value DW_CC_normal. */
14572 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
14574 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
14575 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
14576 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
14578 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
14580 /* Record whether the function returns normally to its caller or not
14581 if the DWARF producer set that information. */
14582 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
14583 if (attr
&& (DW_UNSND (attr
) != 0))
14584 TYPE_NO_RETURN (ftype
) = 1;
14586 /* We need to add the subroutine type to the die immediately so
14587 we don't infinitely recurse when dealing with parameters
14588 declared as the same subroutine type. */
14589 set_die_type (die
, ftype
, cu
);
14591 if (die
->child
!= NULL
)
14593 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
14594 struct die_info
*child_die
;
14595 int nparams
, iparams
;
14597 /* Count the number of parameters.
14598 FIXME: GDB currently ignores vararg functions, but knows about
14599 vararg member functions. */
14601 child_die
= die
->child
;
14602 while (child_die
&& child_die
->tag
)
14604 if (child_die
->tag
== DW_TAG_formal_parameter
)
14606 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
14607 TYPE_VARARGS (ftype
) = 1;
14608 child_die
= sibling_die (child_die
);
14611 /* Allocate storage for parameters and fill them in. */
14612 TYPE_NFIELDS (ftype
) = nparams
;
14613 TYPE_FIELDS (ftype
) = (struct field
*)
14614 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
14616 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
14617 even if we error out during the parameters reading below. */
14618 for (iparams
= 0; iparams
< nparams
; iparams
++)
14619 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
14622 child_die
= die
->child
;
14623 while (child_die
&& child_die
->tag
)
14625 if (child_die
->tag
== DW_TAG_formal_parameter
)
14627 struct type
*arg_type
;
14629 /* DWARF version 2 has no clean way to discern C++
14630 static and non-static member functions. G++ helps
14631 GDB by marking the first parameter for non-static
14632 member functions (which is the this pointer) as
14633 artificial. We pass this information to
14634 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
14636 DWARF version 3 added DW_AT_object_pointer, which GCC
14637 4.5 does not yet generate. */
14638 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
14640 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
14642 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
14643 arg_type
= die_type (child_die
, cu
);
14645 /* RealView does not mark THIS as const, which the testsuite
14646 expects. GCC marks THIS as const in method definitions,
14647 but not in the class specifications (GCC PR 43053). */
14648 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
14649 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
14652 struct dwarf2_cu
*arg_cu
= cu
;
14653 const char *name
= dwarf2_name (child_die
, cu
);
14655 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
14658 /* If the compiler emits this, use it. */
14659 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
14662 else if (name
&& strcmp (name
, "this") == 0)
14663 /* Function definitions will have the argument names. */
14665 else if (name
== NULL
&& iparams
== 0)
14666 /* Declarations may not have the names, so like
14667 elsewhere in GDB, assume an artificial first
14668 argument is "this". */
14672 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
14676 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
14679 child_die
= sibling_die (child_die
);
14686 static struct type
*
14687 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
14689 struct objfile
*objfile
= cu
->objfile
;
14690 const char *name
= NULL
;
14691 struct type
*this_type
, *target_type
;
14693 name
= dwarf2_full_name (NULL
, die
, cu
);
14694 this_type
= init_type (objfile
, TYPE_CODE_TYPEDEF
, 0, name
);
14695 TYPE_TARGET_STUB (this_type
) = 1;
14696 set_die_type (die
, this_type
, cu
);
14697 target_type
= die_type (die
, cu
);
14698 if (target_type
!= this_type
)
14699 TYPE_TARGET_TYPE (this_type
) = target_type
;
14702 /* Self-referential typedefs are, it seems, not allowed by the DWARF
14703 spec and cause infinite loops in GDB. */
14704 complaint (&symfile_complaints
,
14705 _("Self-referential DW_TAG_typedef "
14706 "- DIE at 0x%x [in module %s]"),
14707 die
->offset
.sect_off
, objfile_name (objfile
));
14708 TYPE_TARGET_TYPE (this_type
) = NULL
;
14713 /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT
14714 (which may be different from NAME) to the architecture back-end to allow
14715 it to guess the correct format if necessary. */
14717 static struct type
*
14718 dwarf2_init_float_type (struct objfile
*objfile
, int bits
, const char *name
,
14719 const char *name_hint
)
14721 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14722 const struct floatformat
**format
;
14725 format
= gdbarch_floatformat_for_type (gdbarch
, name_hint
, bits
);
14727 type
= init_float_type (objfile
, bits
, name
, format
);
14729 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
/ TARGET_CHAR_BIT
, name
);
14734 /* Find a representation of a given base type and install
14735 it in the TYPE field of the die. */
14737 static struct type
*
14738 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14740 struct objfile
*objfile
= cu
->objfile
;
14742 struct attribute
*attr
;
14743 int encoding
= 0, bits
= 0;
14746 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
14749 encoding
= DW_UNSND (attr
);
14751 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14754 bits
= DW_UNSND (attr
) * TARGET_CHAR_BIT
;
14756 name
= dwarf2_name (die
, cu
);
14759 complaint (&symfile_complaints
,
14760 _("DW_AT_name missing from DW_TAG_base_type"));
14765 case DW_ATE_address
:
14766 /* Turn DW_ATE_address into a void * pointer. */
14767 type
= init_type (objfile
, TYPE_CODE_VOID
, 1, NULL
);
14768 type
= init_pointer_type (objfile
, bits
, name
, type
);
14770 case DW_ATE_boolean
:
14771 type
= init_boolean_type (objfile
, bits
, 1, name
);
14773 case DW_ATE_complex_float
:
14774 type
= dwarf2_init_float_type (objfile
, bits
/ 2, NULL
, name
);
14775 type
= init_complex_type (objfile
, name
, type
);
14777 case DW_ATE_decimal_float
:
14778 type
= init_decfloat_type (objfile
, bits
, name
);
14781 type
= dwarf2_init_float_type (objfile
, bits
, name
, name
);
14783 case DW_ATE_signed
:
14784 type
= init_integer_type (objfile
, bits
, 0, name
);
14786 case DW_ATE_unsigned
:
14787 if (cu
->language
== language_fortran
14789 && startswith (name
, "character("))
14790 type
= init_character_type (objfile
, bits
, 1, name
);
14792 type
= init_integer_type (objfile
, bits
, 1, name
);
14794 case DW_ATE_signed_char
:
14795 if (cu
->language
== language_ada
|| cu
->language
== language_m2
14796 || cu
->language
== language_pascal
14797 || cu
->language
== language_fortran
)
14798 type
= init_character_type (objfile
, bits
, 0, name
);
14800 type
= init_integer_type (objfile
, bits
, 0, name
);
14802 case DW_ATE_unsigned_char
:
14803 if (cu
->language
== language_ada
|| cu
->language
== language_m2
14804 || cu
->language
== language_pascal
14805 || cu
->language
== language_fortran
14806 || cu
->language
== language_rust
)
14807 type
= init_character_type (objfile
, bits
, 1, name
);
14809 type
= init_integer_type (objfile
, bits
, 1, name
);
14812 /* We just treat this as an integer and then recognize the
14813 type by name elsewhere. */
14814 type
= init_integer_type (objfile
, bits
, 0, name
);
14818 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
14819 dwarf_type_encoding_name (encoding
));
14820 type
= init_type (objfile
, TYPE_CODE_ERROR
,
14821 bits
/ TARGET_CHAR_BIT
, name
);
14825 if (name
&& strcmp (name
, "char") == 0)
14826 TYPE_NOSIGN (type
) = 1;
14828 return set_die_type (die
, type
, cu
);
14831 /* Parse dwarf attribute if it's a block, reference or constant and put the
14832 resulting value of the attribute into struct bound_prop.
14833 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
14836 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
14837 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
)
14839 struct dwarf2_property_baton
*baton
;
14840 struct obstack
*obstack
= &cu
->objfile
->objfile_obstack
;
14842 if (attr
== NULL
|| prop
== NULL
)
14845 if (attr_form_is_block (attr
))
14847 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
14848 baton
->referenced_type
= NULL
;
14849 baton
->locexpr
.per_cu
= cu
->per_cu
;
14850 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
14851 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
14852 prop
->data
.baton
= baton
;
14853 prop
->kind
= PROP_LOCEXPR
;
14854 gdb_assert (prop
->data
.baton
!= NULL
);
14856 else if (attr_form_is_ref (attr
))
14858 struct dwarf2_cu
*target_cu
= cu
;
14859 struct die_info
*target_die
;
14860 struct attribute
*target_attr
;
14862 target_die
= follow_die_ref (die
, attr
, &target_cu
);
14863 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
14864 if (target_attr
== NULL
)
14865 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
14867 if (target_attr
== NULL
)
14870 switch (target_attr
->name
)
14872 case DW_AT_location
:
14873 if (attr_form_is_section_offset (target_attr
))
14875 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
14876 baton
->referenced_type
= die_type (target_die
, target_cu
);
14877 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
14878 prop
->data
.baton
= baton
;
14879 prop
->kind
= PROP_LOCLIST
;
14880 gdb_assert (prop
->data
.baton
!= NULL
);
14882 else if (attr_form_is_block (target_attr
))
14884 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
14885 baton
->referenced_type
= die_type (target_die
, target_cu
);
14886 baton
->locexpr
.per_cu
= cu
->per_cu
;
14887 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
14888 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
14889 prop
->data
.baton
= baton
;
14890 prop
->kind
= PROP_LOCEXPR
;
14891 gdb_assert (prop
->data
.baton
!= NULL
);
14895 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
14896 "dynamic property");
14900 case DW_AT_data_member_location
:
14904 if (!handle_data_member_location (target_die
, target_cu
,
14908 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
14909 baton
->referenced_type
= read_type_die (target_die
->parent
,
14911 baton
->offset_info
.offset
= offset
;
14912 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
14913 prop
->data
.baton
= baton
;
14914 prop
->kind
= PROP_ADDR_OFFSET
;
14919 else if (attr_form_is_constant (attr
))
14921 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
14922 prop
->kind
= PROP_CONST
;
14926 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
14927 dwarf2_name (die
, cu
));
14934 /* Read the given DW_AT_subrange DIE. */
14936 static struct type
*
14937 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14939 struct type
*base_type
, *orig_base_type
;
14940 struct type
*range_type
;
14941 struct attribute
*attr
;
14942 struct dynamic_prop low
, high
;
14943 int low_default_is_valid
;
14944 int high_bound_is_count
= 0;
14946 LONGEST negative_mask
;
14948 orig_base_type
= die_type (die
, cu
);
14949 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
14950 whereas the real type might be. So, we use ORIG_BASE_TYPE when
14951 creating the range type, but we use the result of check_typedef
14952 when examining properties of the type. */
14953 base_type
= check_typedef (orig_base_type
);
14955 /* The die_type call above may have already set the type for this DIE. */
14956 range_type
= get_die_type (die
, cu
);
14960 low
.kind
= PROP_CONST
;
14961 high
.kind
= PROP_CONST
;
14962 high
.data
.const_val
= 0;
14964 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
14965 omitting DW_AT_lower_bound. */
14966 switch (cu
->language
)
14969 case language_cplus
:
14970 low
.data
.const_val
= 0;
14971 low_default_is_valid
= 1;
14973 case language_fortran
:
14974 low
.data
.const_val
= 1;
14975 low_default_is_valid
= 1;
14978 case language_objc
:
14979 case language_rust
:
14980 low
.data
.const_val
= 0;
14981 low_default_is_valid
= (cu
->header
.version
>= 4);
14985 case language_pascal
:
14986 low
.data
.const_val
= 1;
14987 low_default_is_valid
= (cu
->header
.version
>= 4);
14990 low
.data
.const_val
= 0;
14991 low_default_is_valid
= 0;
14995 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
14997 attr_to_dynamic_prop (attr
, die
, cu
, &low
);
14998 else if (!low_default_is_valid
)
14999 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
15000 "- DIE at 0x%x [in module %s]"),
15001 die
->offset
.sect_off
, objfile_name (cu
->objfile
));
15003 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
15004 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
))
15006 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
15007 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
))
15009 /* If bounds are constant do the final calculation here. */
15010 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
15011 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
15013 high_bound_is_count
= 1;
15017 /* Dwarf-2 specifications explicitly allows to create subrange types
15018 without specifying a base type.
15019 In that case, the base type must be set to the type of
15020 the lower bound, upper bound or count, in that order, if any of these
15021 three attributes references an object that has a type.
15022 If no base type is found, the Dwarf-2 specifications say that
15023 a signed integer type of size equal to the size of an address should
15025 For the following C code: `extern char gdb_int [];'
15026 GCC produces an empty range DIE.
15027 FIXME: muller/2010-05-28: Possible references to object for low bound,
15028 high bound or count are not yet handled by this code. */
15029 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
15031 struct objfile
*objfile
= cu
->objfile
;
15032 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15033 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
15034 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
15036 /* Test "int", "long int", and "long long int" objfile types,
15037 and select the first one having a size above or equal to the
15038 architecture address size. */
15039 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15040 base_type
= int_type
;
15043 int_type
= objfile_type (objfile
)->builtin_long
;
15044 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15045 base_type
= int_type
;
15048 int_type
= objfile_type (objfile
)->builtin_long_long
;
15049 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15050 base_type
= int_type
;
15055 /* Normally, the DWARF producers are expected to use a signed
15056 constant form (Eg. DW_FORM_sdata) to express negative bounds.
15057 But this is unfortunately not always the case, as witnessed
15058 with GCC, for instance, where the ambiguous DW_FORM_dataN form
15059 is used instead. To work around that ambiguity, we treat
15060 the bounds as signed, and thus sign-extend their values, when
15061 the base type is signed. */
15063 -((LONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
15064 if (low
.kind
== PROP_CONST
15065 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
15066 low
.data
.const_val
|= negative_mask
;
15067 if (high
.kind
== PROP_CONST
15068 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
15069 high
.data
.const_val
|= negative_mask
;
15071 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
);
15073 if (high_bound_is_count
)
15074 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
15076 /* Ada expects an empty array on no boundary attributes. */
15077 if (attr
== NULL
&& cu
->language
!= language_ada
)
15078 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
15080 name
= dwarf2_name (die
, cu
);
15082 TYPE_NAME (range_type
) = name
;
15084 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15086 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
15088 set_die_type (die
, range_type
, cu
);
15090 /* set_die_type should be already done. */
15091 set_descriptive_type (range_type
, die
, cu
);
15096 static struct type
*
15097 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15101 /* For now, we only support the C meaning of an unspecified type: void. */
15103 type
= init_type (cu
->objfile
, TYPE_CODE_VOID
, 0, NULL
);
15104 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
15106 return set_die_type (die
, type
, cu
);
15109 /* Read a single die and all its descendents. Set the die's sibling
15110 field to NULL; set other fields in the die correctly, and set all
15111 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
15112 location of the info_ptr after reading all of those dies. PARENT
15113 is the parent of the die in question. */
15115 static struct die_info
*
15116 read_die_and_children (const struct die_reader_specs
*reader
,
15117 const gdb_byte
*info_ptr
,
15118 const gdb_byte
**new_info_ptr
,
15119 struct die_info
*parent
)
15121 struct die_info
*die
;
15122 const gdb_byte
*cur_ptr
;
15125 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
15128 *new_info_ptr
= cur_ptr
;
15131 store_in_ref_table (die
, reader
->cu
);
15134 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
15138 *new_info_ptr
= cur_ptr
;
15141 die
->sibling
= NULL
;
15142 die
->parent
= parent
;
15146 /* Read a die, all of its descendents, and all of its siblings; set
15147 all of the fields of all of the dies correctly. Arguments are as
15148 in read_die_and_children. */
15150 static struct die_info
*
15151 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
15152 const gdb_byte
*info_ptr
,
15153 const gdb_byte
**new_info_ptr
,
15154 struct die_info
*parent
)
15156 struct die_info
*first_die
, *last_sibling
;
15157 const gdb_byte
*cur_ptr
;
15159 cur_ptr
= info_ptr
;
15160 first_die
= last_sibling
= NULL
;
15164 struct die_info
*die
15165 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
15169 *new_info_ptr
= cur_ptr
;
15176 last_sibling
->sibling
= die
;
15178 last_sibling
= die
;
15182 /* Read a die, all of its descendents, and all of its siblings; set
15183 all of the fields of all of the dies correctly. Arguments are as
15184 in read_die_and_children.
15185 This the main entry point for reading a DIE and all its children. */
15187 static struct die_info
*
15188 read_die_and_siblings (const struct die_reader_specs
*reader
,
15189 const gdb_byte
*info_ptr
,
15190 const gdb_byte
**new_info_ptr
,
15191 struct die_info
*parent
)
15193 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
15194 new_info_ptr
, parent
);
15196 if (dwarf_die_debug
)
15198 fprintf_unfiltered (gdb_stdlog
,
15199 "Read die from %s@0x%x of %s:\n",
15200 get_section_name (reader
->die_section
),
15201 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
15202 bfd_get_filename (reader
->abfd
));
15203 dump_die (die
, dwarf_die_debug
);
15209 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
15211 The caller is responsible for filling in the extra attributes
15212 and updating (*DIEP)->num_attrs.
15213 Set DIEP to point to a newly allocated die with its information,
15214 except for its child, sibling, and parent fields.
15215 Set HAS_CHILDREN to tell whether the die has children or not. */
15217 static const gdb_byte
*
15218 read_full_die_1 (const struct die_reader_specs
*reader
,
15219 struct die_info
**diep
, const gdb_byte
*info_ptr
,
15220 int *has_children
, int num_extra_attrs
)
15222 unsigned int abbrev_number
, bytes_read
, i
;
15223 sect_offset offset
;
15224 struct abbrev_info
*abbrev
;
15225 struct die_info
*die
;
15226 struct dwarf2_cu
*cu
= reader
->cu
;
15227 bfd
*abfd
= reader
->abfd
;
15229 offset
.sect_off
= info_ptr
- reader
->buffer
;
15230 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
15231 info_ptr
+= bytes_read
;
15232 if (!abbrev_number
)
15239 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
15241 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
15243 bfd_get_filename (abfd
));
15245 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
15246 die
->offset
= offset
;
15247 die
->tag
= abbrev
->tag
;
15248 die
->abbrev
= abbrev_number
;
15250 /* Make the result usable.
15251 The caller needs to update num_attrs after adding the extra
15253 die
->num_attrs
= abbrev
->num_attrs
;
15255 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
15256 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
15260 *has_children
= abbrev
->has_children
;
15264 /* Read a die and all its attributes.
15265 Set DIEP to point to a newly allocated die with its information,
15266 except for its child, sibling, and parent fields.
15267 Set HAS_CHILDREN to tell whether the die has children or not. */
15269 static const gdb_byte
*
15270 read_full_die (const struct die_reader_specs
*reader
,
15271 struct die_info
**diep
, const gdb_byte
*info_ptr
,
15274 const gdb_byte
*result
;
15276 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
15278 if (dwarf_die_debug
)
15280 fprintf_unfiltered (gdb_stdlog
,
15281 "Read die from %s@0x%x of %s:\n",
15282 get_section_name (reader
->die_section
),
15283 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
15284 bfd_get_filename (reader
->abfd
));
15285 dump_die (*diep
, dwarf_die_debug
);
15291 /* Abbreviation tables.
15293 In DWARF version 2, the description of the debugging information is
15294 stored in a separate .debug_abbrev section. Before we read any
15295 dies from a section we read in all abbreviations and install them
15296 in a hash table. */
15298 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
15300 static struct abbrev_info
*
15301 abbrev_table_alloc_abbrev (struct abbrev_table
*abbrev_table
)
15303 struct abbrev_info
*abbrev
;
15305 abbrev
= XOBNEW (&abbrev_table
->abbrev_obstack
, struct abbrev_info
);
15306 memset (abbrev
, 0, sizeof (struct abbrev_info
));
15311 /* Add an abbreviation to the table. */
15314 abbrev_table_add_abbrev (struct abbrev_table
*abbrev_table
,
15315 unsigned int abbrev_number
,
15316 struct abbrev_info
*abbrev
)
15318 unsigned int hash_number
;
15320 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15321 abbrev
->next
= abbrev_table
->abbrevs
[hash_number
];
15322 abbrev_table
->abbrevs
[hash_number
] = abbrev
;
15325 /* Look up an abbrev in the table.
15326 Returns NULL if the abbrev is not found. */
15328 static struct abbrev_info
*
15329 abbrev_table_lookup_abbrev (const struct abbrev_table
*abbrev_table
,
15330 unsigned int abbrev_number
)
15332 unsigned int hash_number
;
15333 struct abbrev_info
*abbrev
;
15335 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15336 abbrev
= abbrev_table
->abbrevs
[hash_number
];
15340 if (abbrev
->number
== abbrev_number
)
15342 abbrev
= abbrev
->next
;
15347 /* Read in an abbrev table. */
15349 static struct abbrev_table
*
15350 abbrev_table_read_table (struct dwarf2_section_info
*section
,
15351 sect_offset offset
)
15353 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
15354 bfd
*abfd
= get_section_bfd_owner (section
);
15355 struct abbrev_table
*abbrev_table
;
15356 const gdb_byte
*abbrev_ptr
;
15357 struct abbrev_info
*cur_abbrev
;
15358 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
15359 unsigned int abbrev_form
;
15360 struct attr_abbrev
*cur_attrs
;
15361 unsigned int allocated_attrs
;
15363 abbrev_table
= XNEW (struct abbrev_table
);
15364 abbrev_table
->offset
= offset
;
15365 obstack_init (&abbrev_table
->abbrev_obstack
);
15366 abbrev_table
->abbrevs
=
15367 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct abbrev_info
*,
15369 memset (abbrev_table
->abbrevs
, 0,
15370 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
15372 dwarf2_read_section (objfile
, section
);
15373 abbrev_ptr
= section
->buffer
+ offset
.sect_off
;
15374 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15375 abbrev_ptr
+= bytes_read
;
15377 allocated_attrs
= ATTR_ALLOC_CHUNK
;
15378 cur_attrs
= XNEWVEC (struct attr_abbrev
, allocated_attrs
);
15380 /* Loop until we reach an abbrev number of 0. */
15381 while (abbrev_number
)
15383 cur_abbrev
= abbrev_table_alloc_abbrev (abbrev_table
);
15385 /* read in abbrev header */
15386 cur_abbrev
->number
= abbrev_number
;
15388 = (enum dwarf_tag
) read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15389 abbrev_ptr
+= bytes_read
;
15390 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
15393 /* now read in declarations */
15394 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15395 abbrev_ptr
+= bytes_read
;
15396 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15397 abbrev_ptr
+= bytes_read
;
15398 while (abbrev_name
)
15400 if (cur_abbrev
->num_attrs
== allocated_attrs
)
15402 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
15404 = XRESIZEVEC (struct attr_abbrev
, cur_attrs
, allocated_attrs
);
15407 cur_attrs
[cur_abbrev
->num_attrs
].name
15408 = (enum dwarf_attribute
) abbrev_name
;
15409 cur_attrs
[cur_abbrev
->num_attrs
++].form
15410 = (enum dwarf_form
) abbrev_form
;
15411 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15412 abbrev_ptr
+= bytes_read
;
15413 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15414 abbrev_ptr
+= bytes_read
;
15417 cur_abbrev
->attrs
=
15418 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct attr_abbrev
,
15419 cur_abbrev
->num_attrs
);
15420 memcpy (cur_abbrev
->attrs
, cur_attrs
,
15421 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
15423 abbrev_table_add_abbrev (abbrev_table
, abbrev_number
, cur_abbrev
);
15425 /* Get next abbreviation.
15426 Under Irix6 the abbreviations for a compilation unit are not
15427 always properly terminated with an abbrev number of 0.
15428 Exit loop if we encounter an abbreviation which we have
15429 already read (which means we are about to read the abbreviations
15430 for the next compile unit) or if the end of the abbreviation
15431 table is reached. */
15432 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
15434 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15435 abbrev_ptr
+= bytes_read
;
15436 if (abbrev_table_lookup_abbrev (abbrev_table
, abbrev_number
) != NULL
)
15441 return abbrev_table
;
15444 /* Free the resources held by ABBREV_TABLE. */
15447 abbrev_table_free (struct abbrev_table
*abbrev_table
)
15449 obstack_free (&abbrev_table
->abbrev_obstack
, NULL
);
15450 xfree (abbrev_table
);
15453 /* Same as abbrev_table_free but as a cleanup.
15454 We pass in a pointer to the pointer to the table so that we can
15455 set the pointer to NULL when we're done. It also simplifies
15456 build_type_psymtabs_1. */
15459 abbrev_table_free_cleanup (void *table_ptr
)
15461 struct abbrev_table
**abbrev_table_ptr
= (struct abbrev_table
**) table_ptr
;
15463 if (*abbrev_table_ptr
!= NULL
)
15464 abbrev_table_free (*abbrev_table_ptr
);
15465 *abbrev_table_ptr
= NULL
;
15468 /* Read the abbrev table for CU from ABBREV_SECTION. */
15471 dwarf2_read_abbrevs (struct dwarf2_cu
*cu
,
15472 struct dwarf2_section_info
*abbrev_section
)
15475 abbrev_table_read_table (abbrev_section
, cu
->header
.abbrev_offset
);
15478 /* Release the memory used by the abbrev table for a compilation unit. */
15481 dwarf2_free_abbrev_table (void *ptr_to_cu
)
15483 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr_to_cu
;
15485 if (cu
->abbrev_table
!= NULL
)
15486 abbrev_table_free (cu
->abbrev_table
);
15487 /* Set this to NULL so that we SEGV if we try to read it later,
15488 and also because free_comp_unit verifies this is NULL. */
15489 cu
->abbrev_table
= NULL
;
15492 /* Returns nonzero if TAG represents a type that we might generate a partial
15496 is_type_tag_for_partial (int tag
)
15501 /* Some types that would be reasonable to generate partial symbols for,
15502 that we don't at present. */
15503 case DW_TAG_array_type
:
15504 case DW_TAG_file_type
:
15505 case DW_TAG_ptr_to_member_type
:
15506 case DW_TAG_set_type
:
15507 case DW_TAG_string_type
:
15508 case DW_TAG_subroutine_type
:
15510 case DW_TAG_base_type
:
15511 case DW_TAG_class_type
:
15512 case DW_TAG_interface_type
:
15513 case DW_TAG_enumeration_type
:
15514 case DW_TAG_structure_type
:
15515 case DW_TAG_subrange_type
:
15516 case DW_TAG_typedef
:
15517 case DW_TAG_union_type
:
15524 /* Load all DIEs that are interesting for partial symbols into memory. */
15526 static struct partial_die_info
*
15527 load_partial_dies (const struct die_reader_specs
*reader
,
15528 const gdb_byte
*info_ptr
, int building_psymtab
)
15530 struct dwarf2_cu
*cu
= reader
->cu
;
15531 struct objfile
*objfile
= cu
->objfile
;
15532 struct partial_die_info
*part_die
;
15533 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
15534 struct abbrev_info
*abbrev
;
15535 unsigned int bytes_read
;
15536 unsigned int load_all
= 0;
15537 int nesting_level
= 1;
15542 gdb_assert (cu
->per_cu
!= NULL
);
15543 if (cu
->per_cu
->load_all_dies
)
15547 = htab_create_alloc_ex (cu
->header
.length
/ 12,
15551 &cu
->comp_unit_obstack
,
15552 hashtab_obstack_allocate
,
15553 dummy_obstack_deallocate
);
15555 part_die
= XOBNEW (&cu
->comp_unit_obstack
, struct partial_die_info
);
15559 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
15561 /* A NULL abbrev means the end of a series of children. */
15562 if (abbrev
== NULL
)
15564 if (--nesting_level
== 0)
15566 /* PART_DIE was probably the last thing allocated on the
15567 comp_unit_obstack, so we could call obstack_free
15568 here. We don't do that because the waste is small,
15569 and will be cleaned up when we're done with this
15570 compilation unit. This way, we're also more robust
15571 against other users of the comp_unit_obstack. */
15574 info_ptr
+= bytes_read
;
15575 last_die
= parent_die
;
15576 parent_die
= parent_die
->die_parent
;
15580 /* Check for template arguments. We never save these; if
15581 they're seen, we just mark the parent, and go on our way. */
15582 if (parent_die
!= NULL
15583 && cu
->language
== language_cplus
15584 && (abbrev
->tag
== DW_TAG_template_type_param
15585 || abbrev
->tag
== DW_TAG_template_value_param
))
15587 parent_die
->has_template_arguments
= 1;
15591 /* We don't need a partial DIE for the template argument. */
15592 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15597 /* We only recurse into c++ subprograms looking for template arguments.
15598 Skip their other children. */
15600 && cu
->language
== language_cplus
15601 && parent_die
!= NULL
15602 && parent_die
->tag
== DW_TAG_subprogram
)
15604 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15608 /* Check whether this DIE is interesting enough to save. Normally
15609 we would not be interested in members here, but there may be
15610 later variables referencing them via DW_AT_specification (for
15611 static members). */
15613 && !is_type_tag_for_partial (abbrev
->tag
)
15614 && abbrev
->tag
!= DW_TAG_constant
15615 && abbrev
->tag
!= DW_TAG_enumerator
15616 && abbrev
->tag
!= DW_TAG_subprogram
15617 && abbrev
->tag
!= DW_TAG_lexical_block
15618 && abbrev
->tag
!= DW_TAG_variable
15619 && abbrev
->tag
!= DW_TAG_namespace
15620 && abbrev
->tag
!= DW_TAG_module
15621 && abbrev
->tag
!= DW_TAG_member
15622 && abbrev
->tag
!= DW_TAG_imported_unit
15623 && abbrev
->tag
!= DW_TAG_imported_declaration
)
15625 /* Otherwise we skip to the next sibling, if any. */
15626 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15630 info_ptr
= read_partial_die (reader
, part_die
, abbrev
, bytes_read
,
15633 /* This two-pass algorithm for processing partial symbols has a
15634 high cost in cache pressure. Thus, handle some simple cases
15635 here which cover the majority of C partial symbols. DIEs
15636 which neither have specification tags in them, nor could have
15637 specification tags elsewhere pointing at them, can simply be
15638 processed and discarded.
15640 This segment is also optional; scan_partial_symbols and
15641 add_partial_symbol will handle these DIEs if we chain
15642 them in normally. When compilers which do not emit large
15643 quantities of duplicate debug information are more common,
15644 this code can probably be removed. */
15646 /* Any complete simple types at the top level (pretty much all
15647 of them, for a language without namespaces), can be processed
15649 if (parent_die
== NULL
15650 && part_die
->has_specification
== 0
15651 && part_die
->is_declaration
== 0
15652 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
15653 || part_die
->tag
== DW_TAG_base_type
15654 || part_die
->tag
== DW_TAG_subrange_type
))
15656 if (building_psymtab
&& part_die
->name
!= NULL
)
15657 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
15658 VAR_DOMAIN
, LOC_TYPEDEF
,
15659 &objfile
->static_psymbols
,
15660 0, cu
->language
, objfile
);
15661 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
15665 /* The exception for DW_TAG_typedef with has_children above is
15666 a workaround of GCC PR debug/47510. In the case of this complaint
15667 type_name_no_tag_or_error will error on such types later.
15669 GDB skipped children of DW_TAG_typedef by the shortcut above and then
15670 it could not find the child DIEs referenced later, this is checked
15671 above. In correct DWARF DW_TAG_typedef should have no children. */
15673 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
15674 complaint (&symfile_complaints
,
15675 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
15676 "- DIE at 0x%x [in module %s]"),
15677 part_die
->offset
.sect_off
, objfile_name (objfile
));
15679 /* If we're at the second level, and we're an enumerator, and
15680 our parent has no specification (meaning possibly lives in a
15681 namespace elsewhere), then we can add the partial symbol now
15682 instead of queueing it. */
15683 if (part_die
->tag
== DW_TAG_enumerator
15684 && parent_die
!= NULL
15685 && parent_die
->die_parent
== NULL
15686 && parent_die
->tag
== DW_TAG_enumeration_type
15687 && parent_die
->has_specification
== 0)
15689 if (part_die
->name
== NULL
)
15690 complaint (&symfile_complaints
,
15691 _("malformed enumerator DIE ignored"));
15692 else if (building_psymtab
)
15693 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
15694 VAR_DOMAIN
, LOC_CONST
,
15695 cu
->language
== language_cplus
15696 ? &objfile
->global_psymbols
15697 : &objfile
->static_psymbols
,
15698 0, cu
->language
, objfile
);
15700 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
15704 /* We'll save this DIE so link it in. */
15705 part_die
->die_parent
= parent_die
;
15706 part_die
->die_sibling
= NULL
;
15707 part_die
->die_child
= NULL
;
15709 if (last_die
&& last_die
== parent_die
)
15710 last_die
->die_child
= part_die
;
15712 last_die
->die_sibling
= part_die
;
15714 last_die
= part_die
;
15716 if (first_die
== NULL
)
15717 first_die
= part_die
;
15719 /* Maybe add the DIE to the hash table. Not all DIEs that we
15720 find interesting need to be in the hash table, because we
15721 also have the parent/sibling/child chains; only those that we
15722 might refer to by offset later during partial symbol reading.
15724 For now this means things that might have be the target of a
15725 DW_AT_specification, DW_AT_abstract_origin, or
15726 DW_AT_extension. DW_AT_extension will refer only to
15727 namespaces; DW_AT_abstract_origin refers to functions (and
15728 many things under the function DIE, but we do not recurse
15729 into function DIEs during partial symbol reading) and
15730 possibly variables as well; DW_AT_specification refers to
15731 declarations. Declarations ought to have the DW_AT_declaration
15732 flag. It happens that GCC forgets to put it in sometimes, but
15733 only for functions, not for types.
15735 Adding more things than necessary to the hash table is harmless
15736 except for the performance cost. Adding too few will result in
15737 wasted time in find_partial_die, when we reread the compilation
15738 unit with load_all_dies set. */
15741 || abbrev
->tag
== DW_TAG_constant
15742 || abbrev
->tag
== DW_TAG_subprogram
15743 || abbrev
->tag
== DW_TAG_variable
15744 || abbrev
->tag
== DW_TAG_namespace
15745 || part_die
->is_declaration
)
15749 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
15750 part_die
->offset
.sect_off
, INSERT
);
15754 part_die
= XOBNEW (&cu
->comp_unit_obstack
, struct partial_die_info
);
15756 /* For some DIEs we want to follow their children (if any). For C
15757 we have no reason to follow the children of structures; for other
15758 languages we have to, so that we can get at method physnames
15759 to infer fully qualified class names, for DW_AT_specification,
15760 and for C++ template arguments. For C++, we also look one level
15761 inside functions to find template arguments (if the name of the
15762 function does not already contain the template arguments).
15764 For Ada, we need to scan the children of subprograms and lexical
15765 blocks as well because Ada allows the definition of nested
15766 entities that could be interesting for the debugger, such as
15767 nested subprograms for instance. */
15768 if (last_die
->has_children
15770 || last_die
->tag
== DW_TAG_namespace
15771 || last_die
->tag
== DW_TAG_module
15772 || last_die
->tag
== DW_TAG_enumeration_type
15773 || (cu
->language
== language_cplus
15774 && last_die
->tag
== DW_TAG_subprogram
15775 && (last_die
->name
== NULL
15776 || strchr (last_die
->name
, '<') == NULL
))
15777 || (cu
->language
!= language_c
15778 && (last_die
->tag
== DW_TAG_class_type
15779 || last_die
->tag
== DW_TAG_interface_type
15780 || last_die
->tag
== DW_TAG_structure_type
15781 || last_die
->tag
== DW_TAG_union_type
))
15782 || (cu
->language
== language_ada
15783 && (last_die
->tag
== DW_TAG_subprogram
15784 || last_die
->tag
== DW_TAG_lexical_block
))))
15787 parent_die
= last_die
;
15791 /* Otherwise we skip to the next sibling, if any. */
15792 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
15794 /* Back to the top, do it again. */
15798 /* Read a minimal amount of information into the minimal die structure. */
15800 static const gdb_byte
*
15801 read_partial_die (const struct die_reader_specs
*reader
,
15802 struct partial_die_info
*part_die
,
15803 struct abbrev_info
*abbrev
, unsigned int abbrev_len
,
15804 const gdb_byte
*info_ptr
)
15806 struct dwarf2_cu
*cu
= reader
->cu
;
15807 struct objfile
*objfile
= cu
->objfile
;
15808 const gdb_byte
*buffer
= reader
->buffer
;
15810 struct attribute attr
;
15811 int has_low_pc_attr
= 0;
15812 int has_high_pc_attr
= 0;
15813 int high_pc_relative
= 0;
15815 memset (part_die
, 0, sizeof (struct partial_die_info
));
15817 part_die
->offset
.sect_off
= info_ptr
- buffer
;
15819 info_ptr
+= abbrev_len
;
15821 if (abbrev
== NULL
)
15824 part_die
->tag
= abbrev
->tag
;
15825 part_die
->has_children
= abbrev
->has_children
;
15827 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
15829 info_ptr
= read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
15831 /* Store the data if it is of an attribute we want to keep in a
15832 partial symbol table. */
15836 switch (part_die
->tag
)
15838 case DW_TAG_compile_unit
:
15839 case DW_TAG_partial_unit
:
15840 case DW_TAG_type_unit
:
15841 /* Compilation units have a DW_AT_name that is a filename, not
15842 a source language identifier. */
15843 case DW_TAG_enumeration_type
:
15844 case DW_TAG_enumerator
:
15845 /* These tags always have simple identifiers already; no need
15846 to canonicalize them. */
15847 part_die
->name
= DW_STRING (&attr
);
15851 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
15852 &objfile
->per_bfd
->storage_obstack
);
15856 case DW_AT_linkage_name
:
15857 case DW_AT_MIPS_linkage_name
:
15858 /* Note that both forms of linkage name might appear. We
15859 assume they will be the same, and we only store the last
15861 if (cu
->language
== language_ada
)
15862 part_die
->name
= DW_STRING (&attr
);
15863 part_die
->linkage_name
= DW_STRING (&attr
);
15866 has_low_pc_attr
= 1;
15867 part_die
->lowpc
= attr_value_as_address (&attr
);
15869 case DW_AT_high_pc
:
15870 has_high_pc_attr
= 1;
15871 part_die
->highpc
= attr_value_as_address (&attr
);
15872 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
15873 high_pc_relative
= 1;
15875 case DW_AT_location
:
15876 /* Support the .debug_loc offsets. */
15877 if (attr_form_is_block (&attr
))
15879 part_die
->d
.locdesc
= DW_BLOCK (&attr
);
15881 else if (attr_form_is_section_offset (&attr
))
15883 dwarf2_complex_location_expr_complaint ();
15887 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
15888 "partial symbol information");
15891 case DW_AT_external
:
15892 part_die
->is_external
= DW_UNSND (&attr
);
15894 case DW_AT_declaration
:
15895 part_die
->is_declaration
= DW_UNSND (&attr
);
15898 part_die
->has_type
= 1;
15900 case DW_AT_abstract_origin
:
15901 case DW_AT_specification
:
15902 case DW_AT_extension
:
15903 part_die
->has_specification
= 1;
15904 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
15905 part_die
->spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
15906 || cu
->per_cu
->is_dwz
);
15908 case DW_AT_sibling
:
15909 /* Ignore absolute siblings, they might point outside of
15910 the current compile unit. */
15911 if (attr
.form
== DW_FORM_ref_addr
)
15912 complaint (&symfile_complaints
,
15913 _("ignoring absolute DW_AT_sibling"));
15916 unsigned int off
= dwarf2_get_ref_die_offset (&attr
).sect_off
;
15917 const gdb_byte
*sibling_ptr
= buffer
+ off
;
15919 if (sibling_ptr
< info_ptr
)
15920 complaint (&symfile_complaints
,
15921 _("DW_AT_sibling points backwards"));
15922 else if (sibling_ptr
> reader
->buffer_end
)
15923 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
15925 part_die
->sibling
= sibling_ptr
;
15928 case DW_AT_byte_size
:
15929 part_die
->has_byte_size
= 1;
15931 case DW_AT_const_value
:
15932 part_die
->has_const_value
= 1;
15934 case DW_AT_calling_convention
:
15935 /* DWARF doesn't provide a way to identify a program's source-level
15936 entry point. DW_AT_calling_convention attributes are only meant
15937 to describe functions' calling conventions.
15939 However, because it's a necessary piece of information in
15940 Fortran, and before DWARF 4 DW_CC_program was the only
15941 piece of debugging information whose definition refers to
15942 a 'main program' at all, several compilers marked Fortran
15943 main programs with DW_CC_program --- even when those
15944 functions use the standard calling conventions.
15946 Although DWARF now specifies a way to provide this
15947 information, we support this practice for backward
15949 if (DW_UNSND (&attr
) == DW_CC_program
15950 && cu
->language
== language_fortran
)
15951 part_die
->main_subprogram
= 1;
15954 if (DW_UNSND (&attr
) == DW_INL_inlined
15955 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
15956 part_die
->may_be_inlined
= 1;
15960 if (part_die
->tag
== DW_TAG_imported_unit
)
15962 part_die
->d
.offset
= dwarf2_get_ref_die_offset (&attr
);
15963 part_die
->is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
15964 || cu
->per_cu
->is_dwz
);
15968 case DW_AT_main_subprogram
:
15969 part_die
->main_subprogram
= DW_UNSND (&attr
);
15977 if (high_pc_relative
)
15978 part_die
->highpc
+= part_die
->lowpc
;
15980 if (has_low_pc_attr
&& has_high_pc_attr
)
15982 /* When using the GNU linker, .gnu.linkonce. sections are used to
15983 eliminate duplicate copies of functions and vtables and such.
15984 The linker will arbitrarily choose one and discard the others.
15985 The AT_*_pc values for such functions refer to local labels in
15986 these sections. If the section from that file was discarded, the
15987 labels are not in the output, so the relocs get a value of 0.
15988 If this is a discarded function, mark the pc bounds as invalid,
15989 so that GDB will ignore it. */
15990 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
15992 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15994 complaint (&symfile_complaints
,
15995 _("DW_AT_low_pc %s is zero "
15996 "for DIE at 0x%x [in module %s]"),
15997 paddress (gdbarch
, part_die
->lowpc
),
15998 part_die
->offset
.sect_off
, objfile_name (objfile
));
16000 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
16001 else if (part_die
->lowpc
>= part_die
->highpc
)
16003 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
16005 complaint (&symfile_complaints
,
16006 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
16007 "for DIE at 0x%x [in module %s]"),
16008 paddress (gdbarch
, part_die
->lowpc
),
16009 paddress (gdbarch
, part_die
->highpc
),
16010 part_die
->offset
.sect_off
, objfile_name (objfile
));
16013 part_die
->has_pc_info
= 1;
16019 /* Find a cached partial DIE at OFFSET in CU. */
16021 static struct partial_die_info
*
16022 find_partial_die_in_comp_unit (sect_offset offset
, struct dwarf2_cu
*cu
)
16024 struct partial_die_info
*lookup_die
= NULL
;
16025 struct partial_die_info part_die
;
16027 part_die
.offset
= offset
;
16028 lookup_die
= ((struct partial_die_info
*)
16029 htab_find_with_hash (cu
->partial_dies
, &part_die
,
16035 /* Find a partial DIE at OFFSET, which may or may not be in CU,
16036 except in the case of .debug_types DIEs which do not reference
16037 outside their CU (they do however referencing other types via
16038 DW_FORM_ref_sig8). */
16040 static struct partial_die_info
*
16041 find_partial_die (sect_offset offset
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
16043 struct objfile
*objfile
= cu
->objfile
;
16044 struct dwarf2_per_cu_data
*per_cu
= NULL
;
16045 struct partial_die_info
*pd
= NULL
;
16047 if (offset_in_dwz
== cu
->per_cu
->is_dwz
16048 && offset_in_cu_p (&cu
->header
, offset
))
16050 pd
= find_partial_die_in_comp_unit (offset
, cu
);
16053 /* We missed recording what we needed.
16054 Load all dies and try again. */
16055 per_cu
= cu
->per_cu
;
16059 /* TUs don't reference other CUs/TUs (except via type signatures). */
16060 if (cu
->per_cu
->is_debug_types
)
16062 error (_("Dwarf Error: Type Unit at offset 0x%lx contains"
16063 " external reference to offset 0x%lx [in module %s].\n"),
16064 (long) cu
->header
.offset
.sect_off
, (long) offset
.sect_off
,
16065 bfd_get_filename (objfile
->obfd
));
16067 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
16070 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
16071 load_partial_comp_unit (per_cu
);
16073 per_cu
->cu
->last_used
= 0;
16074 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
16077 /* If we didn't find it, and not all dies have been loaded,
16078 load them all and try again. */
16080 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
16082 per_cu
->load_all_dies
= 1;
16084 /* This is nasty. When we reread the DIEs, somewhere up the call chain
16085 THIS_CU->cu may already be in use. So we can't just free it and
16086 replace its DIEs with the ones we read in. Instead, we leave those
16087 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
16088 and clobber THIS_CU->cu->partial_dies with the hash table for the new
16090 load_partial_comp_unit (per_cu
);
16092 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
16096 internal_error (__FILE__
, __LINE__
,
16097 _("could not find partial DIE 0x%x "
16098 "in cache [from module %s]\n"),
16099 offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
16103 /* See if we can figure out if the class lives in a namespace. We do
16104 this by looking for a member function; its demangled name will
16105 contain namespace info, if there is any. */
16108 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
16109 struct dwarf2_cu
*cu
)
16111 /* NOTE: carlton/2003-10-07: Getting the info this way changes
16112 what template types look like, because the demangler
16113 frequently doesn't give the same name as the debug info. We
16114 could fix this by only using the demangled name to get the
16115 prefix (but see comment in read_structure_type). */
16117 struct partial_die_info
*real_pdi
;
16118 struct partial_die_info
*child_pdi
;
16120 /* If this DIE (this DIE's specification, if any) has a parent, then
16121 we should not do this. We'll prepend the parent's fully qualified
16122 name when we create the partial symbol. */
16124 real_pdi
= struct_pdi
;
16125 while (real_pdi
->has_specification
)
16126 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
16127 real_pdi
->spec_is_dwz
, cu
);
16129 if (real_pdi
->die_parent
!= NULL
)
16132 for (child_pdi
= struct_pdi
->die_child
;
16134 child_pdi
= child_pdi
->die_sibling
)
16136 if (child_pdi
->tag
== DW_TAG_subprogram
16137 && child_pdi
->linkage_name
!= NULL
)
16139 char *actual_class_name
16140 = language_class_name_from_physname (cu
->language_defn
,
16141 child_pdi
->linkage_name
);
16142 if (actual_class_name
!= NULL
)
16146 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
16148 strlen (actual_class_name
)));
16149 xfree (actual_class_name
);
16156 /* Adjust PART_DIE before generating a symbol for it. This function
16157 may set the is_external flag or change the DIE's name. */
16160 fixup_partial_die (struct partial_die_info
*part_die
,
16161 struct dwarf2_cu
*cu
)
16163 /* Once we've fixed up a die, there's no point in doing so again.
16164 This also avoids a memory leak if we were to call
16165 guess_partial_die_structure_name multiple times. */
16166 if (part_die
->fixup_called
)
16169 /* If we found a reference attribute and the DIE has no name, try
16170 to find a name in the referred to DIE. */
16172 if (part_die
->name
== NULL
&& part_die
->has_specification
)
16174 struct partial_die_info
*spec_die
;
16176 spec_die
= find_partial_die (part_die
->spec_offset
,
16177 part_die
->spec_is_dwz
, cu
);
16179 fixup_partial_die (spec_die
, cu
);
16181 if (spec_die
->name
)
16183 part_die
->name
= spec_die
->name
;
16185 /* Copy DW_AT_external attribute if it is set. */
16186 if (spec_die
->is_external
)
16187 part_die
->is_external
= spec_die
->is_external
;
16191 /* Set default names for some unnamed DIEs. */
16193 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
16194 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
16196 /* If there is no parent die to provide a namespace, and there are
16197 children, see if we can determine the namespace from their linkage
16199 if (cu
->language
== language_cplus
16200 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
16201 && part_die
->die_parent
== NULL
16202 && part_die
->has_children
16203 && (part_die
->tag
== DW_TAG_class_type
16204 || part_die
->tag
== DW_TAG_structure_type
16205 || part_die
->tag
== DW_TAG_union_type
))
16206 guess_partial_die_structure_name (part_die
, cu
);
16208 /* GCC might emit a nameless struct or union that has a linkage
16209 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
16210 if (part_die
->name
== NULL
16211 && (part_die
->tag
== DW_TAG_class_type
16212 || part_die
->tag
== DW_TAG_interface_type
16213 || part_die
->tag
== DW_TAG_structure_type
16214 || part_die
->tag
== DW_TAG_union_type
)
16215 && part_die
->linkage_name
!= NULL
)
16219 demangled
= gdb_demangle (part_die
->linkage_name
, DMGL_TYPES
);
16224 /* Strip any leading namespaces/classes, keep only the base name.
16225 DW_AT_name for named DIEs does not contain the prefixes. */
16226 base
= strrchr (demangled
, ':');
16227 if (base
&& base
> demangled
&& base
[-1] == ':')
16234 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
16235 base
, strlen (base
)));
16240 part_die
->fixup_called
= 1;
16243 /* Read an attribute value described by an attribute form. */
16245 static const gdb_byte
*
16246 read_attribute_value (const struct die_reader_specs
*reader
,
16247 struct attribute
*attr
, unsigned form
,
16248 const gdb_byte
*info_ptr
)
16250 struct dwarf2_cu
*cu
= reader
->cu
;
16251 struct objfile
*objfile
= cu
->objfile
;
16252 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
16253 bfd
*abfd
= reader
->abfd
;
16254 struct comp_unit_head
*cu_header
= &cu
->header
;
16255 unsigned int bytes_read
;
16256 struct dwarf_block
*blk
;
16258 attr
->form
= (enum dwarf_form
) form
;
16261 case DW_FORM_ref_addr
:
16262 if (cu
->header
.version
== 2)
16263 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
16265 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
16266 &cu
->header
, &bytes_read
);
16267 info_ptr
+= bytes_read
;
16269 case DW_FORM_GNU_ref_alt
:
16270 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
16271 info_ptr
+= bytes_read
;
16274 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
16275 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
16276 info_ptr
+= bytes_read
;
16278 case DW_FORM_block2
:
16279 blk
= dwarf_alloc_block (cu
);
16280 blk
->size
= read_2_bytes (abfd
, info_ptr
);
16282 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16283 info_ptr
+= blk
->size
;
16284 DW_BLOCK (attr
) = blk
;
16286 case DW_FORM_block4
:
16287 blk
= dwarf_alloc_block (cu
);
16288 blk
->size
= read_4_bytes (abfd
, info_ptr
);
16290 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16291 info_ptr
+= blk
->size
;
16292 DW_BLOCK (attr
) = blk
;
16294 case DW_FORM_data2
:
16295 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
16298 case DW_FORM_data4
:
16299 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
16302 case DW_FORM_data8
:
16303 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
16306 case DW_FORM_sec_offset
:
16307 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
16308 info_ptr
+= bytes_read
;
16310 case DW_FORM_string
:
16311 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
16312 DW_STRING_IS_CANONICAL (attr
) = 0;
16313 info_ptr
+= bytes_read
;
16316 if (!cu
->per_cu
->is_dwz
)
16318 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
16320 DW_STRING_IS_CANONICAL (attr
) = 0;
16321 info_ptr
+= bytes_read
;
16325 case DW_FORM_GNU_strp_alt
:
16327 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
16328 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
16331 DW_STRING (attr
) = read_indirect_string_from_dwz (dwz
, str_offset
);
16332 DW_STRING_IS_CANONICAL (attr
) = 0;
16333 info_ptr
+= bytes_read
;
16336 case DW_FORM_exprloc
:
16337 case DW_FORM_block
:
16338 blk
= dwarf_alloc_block (cu
);
16339 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16340 info_ptr
+= bytes_read
;
16341 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16342 info_ptr
+= blk
->size
;
16343 DW_BLOCK (attr
) = blk
;
16345 case DW_FORM_block1
:
16346 blk
= dwarf_alloc_block (cu
);
16347 blk
->size
= read_1_byte (abfd
, info_ptr
);
16349 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16350 info_ptr
+= blk
->size
;
16351 DW_BLOCK (attr
) = blk
;
16353 case DW_FORM_data1
:
16354 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16358 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16361 case DW_FORM_flag_present
:
16362 DW_UNSND (attr
) = 1;
16364 case DW_FORM_sdata
:
16365 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
16366 info_ptr
+= bytes_read
;
16368 case DW_FORM_udata
:
16369 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16370 info_ptr
+= bytes_read
;
16373 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16374 + read_1_byte (abfd
, info_ptr
));
16378 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16379 + read_2_bytes (abfd
, info_ptr
));
16383 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16384 + read_4_bytes (abfd
, info_ptr
));
16388 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16389 + read_8_bytes (abfd
, info_ptr
));
16392 case DW_FORM_ref_sig8
:
16393 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
16396 case DW_FORM_ref_udata
:
16397 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16398 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
16399 info_ptr
+= bytes_read
;
16401 case DW_FORM_indirect
:
16402 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16403 info_ptr
+= bytes_read
;
16404 info_ptr
= read_attribute_value (reader
, attr
, form
, info_ptr
);
16406 case DW_FORM_GNU_addr_index
:
16407 if (reader
->dwo_file
== NULL
)
16409 /* For now flag a hard error.
16410 Later we can turn this into a complaint. */
16411 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16412 dwarf_form_name (form
),
16413 bfd_get_filename (abfd
));
16415 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
16416 info_ptr
+= bytes_read
;
16418 case DW_FORM_GNU_str_index
:
16419 if (reader
->dwo_file
== NULL
)
16421 /* For now flag a hard error.
16422 Later we can turn this into a complaint if warranted. */
16423 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16424 dwarf_form_name (form
),
16425 bfd_get_filename (abfd
));
16428 ULONGEST str_index
=
16429 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16431 DW_STRING (attr
) = read_str_index (reader
, str_index
);
16432 DW_STRING_IS_CANONICAL (attr
) = 0;
16433 info_ptr
+= bytes_read
;
16437 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
16438 dwarf_form_name (form
),
16439 bfd_get_filename (abfd
));
16443 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
16444 attr
->form
= DW_FORM_GNU_ref_alt
;
16446 /* We have seen instances where the compiler tried to emit a byte
16447 size attribute of -1 which ended up being encoded as an unsigned
16448 0xffffffff. Although 0xffffffff is technically a valid size value,
16449 an object of this size seems pretty unlikely so we can relatively
16450 safely treat these cases as if the size attribute was invalid and
16451 treat them as zero by default. */
16452 if (attr
->name
== DW_AT_byte_size
16453 && form
== DW_FORM_data4
16454 && DW_UNSND (attr
) >= 0xffffffff)
16457 (&symfile_complaints
,
16458 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
16459 hex_string (DW_UNSND (attr
)));
16460 DW_UNSND (attr
) = 0;
16466 /* Read an attribute described by an abbreviated attribute. */
16468 static const gdb_byte
*
16469 read_attribute (const struct die_reader_specs
*reader
,
16470 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
16471 const gdb_byte
*info_ptr
)
16473 attr
->name
= abbrev
->name
;
16474 return read_attribute_value (reader
, attr
, abbrev
->form
, info_ptr
);
16477 /* Read dwarf information from a buffer. */
16479 static unsigned int
16480 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
16482 return bfd_get_8 (abfd
, buf
);
16486 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
16488 return bfd_get_signed_8 (abfd
, buf
);
16491 static unsigned int
16492 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16494 return bfd_get_16 (abfd
, buf
);
16498 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16500 return bfd_get_signed_16 (abfd
, buf
);
16503 static unsigned int
16504 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16506 return bfd_get_32 (abfd
, buf
);
16510 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16512 return bfd_get_signed_32 (abfd
, buf
);
16516 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16518 return bfd_get_64 (abfd
, buf
);
16522 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
16523 unsigned int *bytes_read
)
16525 struct comp_unit_head
*cu_header
= &cu
->header
;
16526 CORE_ADDR retval
= 0;
16528 if (cu_header
->signed_addr_p
)
16530 switch (cu_header
->addr_size
)
16533 retval
= bfd_get_signed_16 (abfd
, buf
);
16536 retval
= bfd_get_signed_32 (abfd
, buf
);
16539 retval
= bfd_get_signed_64 (abfd
, buf
);
16542 internal_error (__FILE__
, __LINE__
,
16543 _("read_address: bad switch, signed [in module %s]"),
16544 bfd_get_filename (abfd
));
16549 switch (cu_header
->addr_size
)
16552 retval
= bfd_get_16 (abfd
, buf
);
16555 retval
= bfd_get_32 (abfd
, buf
);
16558 retval
= bfd_get_64 (abfd
, buf
);
16561 internal_error (__FILE__
, __LINE__
,
16562 _("read_address: bad switch, "
16563 "unsigned [in module %s]"),
16564 bfd_get_filename (abfd
));
16568 *bytes_read
= cu_header
->addr_size
;
16572 /* Read the initial length from a section. The (draft) DWARF 3
16573 specification allows the initial length to take up either 4 bytes
16574 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
16575 bytes describe the length and all offsets will be 8 bytes in length
16578 An older, non-standard 64-bit format is also handled by this
16579 function. The older format in question stores the initial length
16580 as an 8-byte quantity without an escape value. Lengths greater
16581 than 2^32 aren't very common which means that the initial 4 bytes
16582 is almost always zero. Since a length value of zero doesn't make
16583 sense for the 32-bit format, this initial zero can be considered to
16584 be an escape value which indicates the presence of the older 64-bit
16585 format. As written, the code can't detect (old format) lengths
16586 greater than 4GB. If it becomes necessary to handle lengths
16587 somewhat larger than 4GB, we could allow other small values (such
16588 as the non-sensical values of 1, 2, and 3) to also be used as
16589 escape values indicating the presence of the old format.
16591 The value returned via bytes_read should be used to increment the
16592 relevant pointer after calling read_initial_length().
16594 [ Note: read_initial_length() and read_offset() are based on the
16595 document entitled "DWARF Debugging Information Format", revision
16596 3, draft 8, dated November 19, 2001. This document was obtained
16599 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
16601 This document is only a draft and is subject to change. (So beware.)
16603 Details regarding the older, non-standard 64-bit format were
16604 determined empirically by examining 64-bit ELF files produced by
16605 the SGI toolchain on an IRIX 6.5 machine.
16607 - Kevin, July 16, 2002
16611 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
16613 LONGEST length
= bfd_get_32 (abfd
, buf
);
16615 if (length
== 0xffffffff)
16617 length
= bfd_get_64 (abfd
, buf
+ 4);
16620 else if (length
== 0)
16622 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
16623 length
= bfd_get_64 (abfd
, buf
);
16634 /* Cover function for read_initial_length.
16635 Returns the length of the object at BUF, and stores the size of the
16636 initial length in *BYTES_READ and stores the size that offsets will be in
16638 If the initial length size is not equivalent to that specified in
16639 CU_HEADER then issue a complaint.
16640 This is useful when reading non-comp-unit headers. */
16643 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
16644 const struct comp_unit_head
*cu_header
,
16645 unsigned int *bytes_read
,
16646 unsigned int *offset_size
)
16648 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
16650 gdb_assert (cu_header
->initial_length_size
== 4
16651 || cu_header
->initial_length_size
== 8
16652 || cu_header
->initial_length_size
== 12);
16654 if (cu_header
->initial_length_size
!= *bytes_read
)
16655 complaint (&symfile_complaints
,
16656 _("intermixed 32-bit and 64-bit DWARF sections"));
16658 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
16662 /* Read an offset from the data stream. The size of the offset is
16663 given by cu_header->offset_size. */
16666 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
16667 const struct comp_unit_head
*cu_header
,
16668 unsigned int *bytes_read
)
16670 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
16672 *bytes_read
= cu_header
->offset_size
;
16676 /* Read an offset from the data stream. */
16679 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
16681 LONGEST retval
= 0;
16683 switch (offset_size
)
16686 retval
= bfd_get_32 (abfd
, buf
);
16689 retval
= bfd_get_64 (abfd
, buf
);
16692 internal_error (__FILE__
, __LINE__
,
16693 _("read_offset_1: bad switch [in module %s]"),
16694 bfd_get_filename (abfd
));
16700 static const gdb_byte
*
16701 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
16703 /* If the size of a host char is 8 bits, we can return a pointer
16704 to the buffer, otherwise we have to copy the data to a buffer
16705 allocated on the temporary obstack. */
16706 gdb_assert (HOST_CHAR_BIT
== 8);
16710 static const char *
16711 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
16712 unsigned int *bytes_read_ptr
)
16714 /* If the size of a host char is 8 bits, we can return a pointer
16715 to the string, otherwise we have to copy the string to a buffer
16716 allocated on the temporary obstack. */
16717 gdb_assert (HOST_CHAR_BIT
== 8);
16720 *bytes_read_ptr
= 1;
16723 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
16724 return (const char *) buf
;
16727 static const char *
16728 read_indirect_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
16730 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
16731 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
16732 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
16733 bfd_get_filename (abfd
));
16734 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
16735 error (_("DW_FORM_strp pointing outside of "
16736 ".debug_str section [in module %s]"),
16737 bfd_get_filename (abfd
));
16738 gdb_assert (HOST_CHAR_BIT
== 8);
16739 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
16741 return (const char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
16744 /* Read a string at offset STR_OFFSET in the .debug_str section from
16745 the .dwz file DWZ. Throw an error if the offset is too large. If
16746 the string consists of a single NUL byte, return NULL; otherwise
16747 return a pointer to the string. */
16749 static const char *
16750 read_indirect_string_from_dwz (struct dwz_file
*dwz
, LONGEST str_offset
)
16752 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwz
->str
);
16754 if (dwz
->str
.buffer
== NULL
)
16755 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
16756 "section [in module %s]"),
16757 bfd_get_filename (dwz
->dwz_bfd
));
16758 if (str_offset
>= dwz
->str
.size
)
16759 error (_("DW_FORM_GNU_strp_alt pointing outside of "
16760 ".debug_str section [in module %s]"),
16761 bfd_get_filename (dwz
->dwz_bfd
));
16762 gdb_assert (HOST_CHAR_BIT
== 8);
16763 if (dwz
->str
.buffer
[str_offset
] == '\0')
16765 return (const char *) (dwz
->str
.buffer
+ str_offset
);
16768 static const char *
16769 read_indirect_string (bfd
*abfd
, const gdb_byte
*buf
,
16770 const struct comp_unit_head
*cu_header
,
16771 unsigned int *bytes_read_ptr
)
16773 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
16775 return read_indirect_string_at_offset (abfd
, str_offset
);
16779 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
16780 unsigned int *bytes_read_ptr
)
16783 unsigned int num_read
;
16785 unsigned char byte
;
16792 byte
= bfd_get_8 (abfd
, buf
);
16795 result
|= ((ULONGEST
) (byte
& 127) << shift
);
16796 if ((byte
& 128) == 0)
16802 *bytes_read_ptr
= num_read
;
16807 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
16808 unsigned int *bytes_read_ptr
)
16811 int shift
, num_read
;
16812 unsigned char byte
;
16819 byte
= bfd_get_8 (abfd
, buf
);
16822 result
|= ((LONGEST
) (byte
& 127) << shift
);
16824 if ((byte
& 128) == 0)
16829 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
16830 result
|= -(((LONGEST
) 1) << shift
);
16831 *bytes_read_ptr
= num_read
;
16835 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
16836 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
16837 ADDR_SIZE is the size of addresses from the CU header. */
16840 read_addr_index_1 (unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
16842 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16843 bfd
*abfd
= objfile
->obfd
;
16844 const gdb_byte
*info_ptr
;
16846 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
16847 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
16848 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
16849 objfile_name (objfile
));
16850 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
16851 error (_("DW_FORM_addr_index pointing outside of "
16852 ".debug_addr section [in module %s]"),
16853 objfile_name (objfile
));
16854 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
16855 + addr_base
+ addr_index
* addr_size
);
16856 if (addr_size
== 4)
16857 return bfd_get_32 (abfd
, info_ptr
);
16859 return bfd_get_64 (abfd
, info_ptr
);
16862 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
16865 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
16867 return read_addr_index_1 (addr_index
, cu
->addr_base
, cu
->header
.addr_size
);
16870 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
16873 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
16874 unsigned int *bytes_read
)
16876 bfd
*abfd
= cu
->objfile
->obfd
;
16877 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
16879 return read_addr_index (cu
, addr_index
);
16882 /* Data structure to pass results from dwarf2_read_addr_index_reader
16883 back to dwarf2_read_addr_index. */
16885 struct dwarf2_read_addr_index_data
16887 ULONGEST addr_base
;
16891 /* die_reader_func for dwarf2_read_addr_index. */
16894 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
16895 const gdb_byte
*info_ptr
,
16896 struct die_info
*comp_unit_die
,
16900 struct dwarf2_cu
*cu
= reader
->cu
;
16901 struct dwarf2_read_addr_index_data
*aidata
=
16902 (struct dwarf2_read_addr_index_data
*) data
;
16904 aidata
->addr_base
= cu
->addr_base
;
16905 aidata
->addr_size
= cu
->header
.addr_size
;
16908 /* Given an index in .debug_addr, fetch the value.
16909 NOTE: This can be called during dwarf expression evaluation,
16910 long after the debug information has been read, and thus per_cu->cu
16911 may no longer exist. */
16914 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
16915 unsigned int addr_index
)
16917 struct objfile
*objfile
= per_cu
->objfile
;
16918 struct dwarf2_cu
*cu
= per_cu
->cu
;
16919 ULONGEST addr_base
;
16922 /* This is intended to be called from outside this file. */
16923 dw2_setup (objfile
);
16925 /* We need addr_base and addr_size.
16926 If we don't have PER_CU->cu, we have to get it.
16927 Nasty, but the alternative is storing the needed info in PER_CU,
16928 which at this point doesn't seem justified: it's not clear how frequently
16929 it would get used and it would increase the size of every PER_CU.
16930 Entry points like dwarf2_per_cu_addr_size do a similar thing
16931 so we're not in uncharted territory here.
16932 Alas we need to be a bit more complicated as addr_base is contained
16935 We don't need to read the entire CU(/TU).
16936 We just need the header and top level die.
16938 IWBN to use the aging mechanism to let us lazily later discard the CU.
16939 For now we skip this optimization. */
16943 addr_base
= cu
->addr_base
;
16944 addr_size
= cu
->header
.addr_size
;
16948 struct dwarf2_read_addr_index_data aidata
;
16950 /* Note: We can't use init_cutu_and_read_dies_simple here,
16951 we need addr_base. */
16952 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
16953 dwarf2_read_addr_index_reader
, &aidata
);
16954 addr_base
= aidata
.addr_base
;
16955 addr_size
= aidata
.addr_size
;
16958 return read_addr_index_1 (addr_index
, addr_base
, addr_size
);
16961 /* Given a DW_FORM_GNU_str_index, fetch the string.
16962 This is only used by the Fission support. */
16964 static const char *
16965 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
16967 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16968 const char *objf_name
= objfile_name (objfile
);
16969 bfd
*abfd
= objfile
->obfd
;
16970 struct dwarf2_cu
*cu
= reader
->cu
;
16971 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
16972 struct dwarf2_section_info
*str_offsets_section
=
16973 &reader
->dwo_file
->sections
.str_offsets
;
16974 const gdb_byte
*info_ptr
;
16975 ULONGEST str_offset
;
16976 static const char form_name
[] = "DW_FORM_GNU_str_index";
16978 dwarf2_read_section (objfile
, str_section
);
16979 dwarf2_read_section (objfile
, str_offsets_section
);
16980 if (str_section
->buffer
== NULL
)
16981 error (_("%s used without .debug_str.dwo section"
16982 " in CU at offset 0x%lx [in module %s]"),
16983 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16984 if (str_offsets_section
->buffer
== NULL
)
16985 error (_("%s used without .debug_str_offsets.dwo section"
16986 " in CU at offset 0x%lx [in module %s]"),
16987 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16988 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
16989 error (_("%s pointing outside of .debug_str_offsets.dwo"
16990 " section in CU at offset 0x%lx [in module %s]"),
16991 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16992 info_ptr
= (str_offsets_section
->buffer
16993 + str_index
* cu
->header
.offset_size
);
16994 if (cu
->header
.offset_size
== 4)
16995 str_offset
= bfd_get_32 (abfd
, info_ptr
);
16997 str_offset
= bfd_get_64 (abfd
, info_ptr
);
16998 if (str_offset
>= str_section
->size
)
16999 error (_("Offset from %s pointing outside of"
17000 " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"),
17001 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
17002 return (const char *) (str_section
->buffer
+ str_offset
);
17005 /* Return the length of an LEB128 number in BUF. */
17008 leb128_size (const gdb_byte
*buf
)
17010 const gdb_byte
*begin
= buf
;
17016 if ((byte
& 128) == 0)
17017 return buf
- begin
;
17022 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
17031 cu
->language
= language_c
;
17034 case DW_LANG_C_plus_plus
:
17035 case DW_LANG_C_plus_plus_11
:
17036 case DW_LANG_C_plus_plus_14
:
17037 cu
->language
= language_cplus
;
17040 cu
->language
= language_d
;
17042 case DW_LANG_Fortran77
:
17043 case DW_LANG_Fortran90
:
17044 case DW_LANG_Fortran95
:
17045 case DW_LANG_Fortran03
:
17046 case DW_LANG_Fortran08
:
17047 cu
->language
= language_fortran
;
17050 cu
->language
= language_go
;
17052 case DW_LANG_Mips_Assembler
:
17053 cu
->language
= language_asm
;
17055 case DW_LANG_Ada83
:
17056 case DW_LANG_Ada95
:
17057 cu
->language
= language_ada
;
17059 case DW_LANG_Modula2
:
17060 cu
->language
= language_m2
;
17062 case DW_LANG_Pascal83
:
17063 cu
->language
= language_pascal
;
17066 cu
->language
= language_objc
;
17069 case DW_LANG_Rust_old
:
17070 cu
->language
= language_rust
;
17072 case DW_LANG_Cobol74
:
17073 case DW_LANG_Cobol85
:
17075 cu
->language
= language_minimal
;
17078 cu
->language_defn
= language_def (cu
->language
);
17081 /* Return the named attribute or NULL if not there. */
17083 static struct attribute
*
17084 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
17089 struct attribute
*spec
= NULL
;
17091 for (i
= 0; i
< die
->num_attrs
; ++i
)
17093 if (die
->attrs
[i
].name
== name
)
17094 return &die
->attrs
[i
];
17095 if (die
->attrs
[i
].name
== DW_AT_specification
17096 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
17097 spec
= &die
->attrs
[i
];
17103 die
= follow_die_ref (die
, spec
, &cu
);
17109 /* Return the named attribute or NULL if not there,
17110 but do not follow DW_AT_specification, etc.
17111 This is for use in contexts where we're reading .debug_types dies.
17112 Following DW_AT_specification, DW_AT_abstract_origin will take us
17113 back up the chain, and we want to go down. */
17115 static struct attribute
*
17116 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
17120 for (i
= 0; i
< die
->num_attrs
; ++i
)
17121 if (die
->attrs
[i
].name
== name
)
17122 return &die
->attrs
[i
];
17127 /* Return the string associated with a string-typed attribute, or NULL if it
17128 is either not found or is of an incorrect type. */
17130 static const char *
17131 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
17133 struct attribute
*attr
;
17134 const char *str
= NULL
;
17136 attr
= dwarf2_attr (die
, name
, cu
);
17140 if (attr
->form
== DW_FORM_strp
|| attr
->form
== DW_FORM_string
17141 || attr
->form
== DW_FORM_GNU_strp_alt
)
17142 str
= DW_STRING (attr
);
17144 complaint (&symfile_complaints
,
17145 _("string type expected for attribute %s for "
17146 "DIE at 0x%x in module %s"),
17147 dwarf_attr_name (name
), die
->offset
.sect_off
,
17148 objfile_name (cu
->objfile
));
17154 /* Return non-zero iff the attribute NAME is defined for the given DIE,
17155 and holds a non-zero value. This function should only be used for
17156 DW_FORM_flag or DW_FORM_flag_present attributes. */
17159 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
17161 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
17163 return (attr
&& DW_UNSND (attr
));
17167 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
17169 /* A DIE is a declaration if it has a DW_AT_declaration attribute
17170 which value is non-zero. However, we have to be careful with
17171 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
17172 (via dwarf2_flag_true_p) follows this attribute. So we may
17173 end up accidently finding a declaration attribute that belongs
17174 to a different DIE referenced by the specification attribute,
17175 even though the given DIE does not have a declaration attribute. */
17176 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
17177 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
17180 /* Return the die giving the specification for DIE, if there is
17181 one. *SPEC_CU is the CU containing DIE on input, and the CU
17182 containing the return value on output. If there is no
17183 specification, but there is an abstract origin, that is
17186 static struct die_info
*
17187 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
17189 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
17192 if (spec_attr
== NULL
)
17193 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
17195 if (spec_attr
== NULL
)
17198 return follow_die_ref (die
, spec_attr
, spec_cu
);
17201 /* Free the line_header structure *LH, and any arrays and strings it
17203 NOTE: This is also used as a "cleanup" function. */
17206 free_line_header (struct line_header
*lh
)
17208 if (lh
->standard_opcode_lengths
)
17209 xfree (lh
->standard_opcode_lengths
);
17211 /* Remember that all the lh->file_names[i].name pointers are
17212 pointers into debug_line_buffer, and don't need to be freed. */
17213 if (lh
->file_names
)
17214 xfree (lh
->file_names
);
17216 /* Similarly for the include directory names. */
17217 if (lh
->include_dirs
)
17218 xfree (lh
->include_dirs
);
17223 /* Stub for free_line_header to match void * callback types. */
17226 free_line_header_voidp (void *arg
)
17228 struct line_header
*lh
= (struct line_header
*) arg
;
17230 free_line_header (lh
);
17233 /* Add an entry to LH's include directory table. */
17236 add_include_dir (struct line_header
*lh
, const char *include_dir
)
17238 if (dwarf_line_debug
>= 2)
17239 fprintf_unfiltered (gdb_stdlog
, "Adding dir %u: %s\n",
17240 lh
->num_include_dirs
+ 1, include_dir
);
17242 /* Grow the array if necessary. */
17243 if (lh
->include_dirs_size
== 0)
17245 lh
->include_dirs_size
= 1; /* for testing */
17246 lh
->include_dirs
= XNEWVEC (const char *, lh
->include_dirs_size
);
17248 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
17250 lh
->include_dirs_size
*= 2;
17251 lh
->include_dirs
= XRESIZEVEC (const char *, lh
->include_dirs
,
17252 lh
->include_dirs_size
);
17255 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
17258 /* Add an entry to LH's file name table. */
17261 add_file_name (struct line_header
*lh
,
17263 unsigned int dir_index
,
17264 unsigned int mod_time
,
17265 unsigned int length
)
17267 struct file_entry
*fe
;
17269 if (dwarf_line_debug
>= 2)
17270 fprintf_unfiltered (gdb_stdlog
, "Adding file %u: %s\n",
17271 lh
->num_file_names
+ 1, name
);
17273 /* Grow the array if necessary. */
17274 if (lh
->file_names_size
== 0)
17276 lh
->file_names_size
= 1; /* for testing */
17277 lh
->file_names
= XNEWVEC (struct file_entry
, lh
->file_names_size
);
17279 else if (lh
->num_file_names
>= lh
->file_names_size
)
17281 lh
->file_names_size
*= 2;
17283 = XRESIZEVEC (struct file_entry
, lh
->file_names
, lh
->file_names_size
);
17286 fe
= &lh
->file_names
[lh
->num_file_names
++];
17288 fe
->dir_index
= dir_index
;
17289 fe
->mod_time
= mod_time
;
17290 fe
->length
= length
;
17291 fe
->included_p
= 0;
17295 /* A convenience function to find the proper .debug_line section for a CU. */
17297 static struct dwarf2_section_info
*
17298 get_debug_line_section (struct dwarf2_cu
*cu
)
17300 struct dwarf2_section_info
*section
;
17302 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
17304 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
17305 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
17306 else if (cu
->per_cu
->is_dwz
)
17308 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
17310 section
= &dwz
->line
;
17313 section
= &dwarf2_per_objfile
->line
;
17318 /* Read the statement program header starting at OFFSET in
17319 .debug_line, or .debug_line.dwo. Return a pointer
17320 to a struct line_header, allocated using xmalloc.
17321 Returns NULL if there is a problem reading the header, e.g., if it
17322 has a version we don't understand.
17324 NOTE: the strings in the include directory and file name tables of
17325 the returned object point into the dwarf line section buffer,
17326 and must not be freed. */
17328 static struct line_header
*
17329 dwarf_decode_line_header (unsigned int offset
, struct dwarf2_cu
*cu
)
17331 struct cleanup
*back_to
;
17332 struct line_header
*lh
;
17333 const gdb_byte
*line_ptr
;
17334 unsigned int bytes_read
, offset_size
;
17336 const char *cur_dir
, *cur_file
;
17337 struct dwarf2_section_info
*section
;
17340 section
= get_debug_line_section (cu
);
17341 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
17342 if (section
->buffer
== NULL
)
17344 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
17345 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
17347 complaint (&symfile_complaints
, _("missing .debug_line section"));
17351 /* We can't do this until we know the section is non-empty.
17352 Only then do we know we have such a section. */
17353 abfd
= get_section_bfd_owner (section
);
17355 /* Make sure that at least there's room for the total_length field.
17356 That could be 12 bytes long, but we're just going to fudge that. */
17357 if (offset
+ 4 >= section
->size
)
17359 dwarf2_statement_list_fits_in_line_number_section_complaint ();
17363 lh
= XNEW (struct line_header
);
17364 memset (lh
, 0, sizeof (*lh
));
17365 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
17368 lh
->offset
.sect_off
= offset
;
17369 lh
->offset_in_dwz
= cu
->per_cu
->is_dwz
;
17371 line_ptr
= section
->buffer
+ offset
;
17373 /* Read in the header. */
17375 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
17376 &bytes_read
, &offset_size
);
17377 line_ptr
+= bytes_read
;
17378 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
17380 dwarf2_statement_list_fits_in_line_number_section_complaint ();
17381 do_cleanups (back_to
);
17384 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
17385 lh
->version
= read_2_bytes (abfd
, line_ptr
);
17387 if (lh
->version
> 4)
17389 /* This is a version we don't understand. The format could have
17390 changed in ways we don't handle properly so just punt. */
17391 complaint (&symfile_complaints
,
17392 _("unsupported version in .debug_line section"));
17395 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
17396 line_ptr
+= offset_size
;
17397 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
17399 if (lh
->version
>= 4)
17401 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
17405 lh
->maximum_ops_per_instruction
= 1;
17407 if (lh
->maximum_ops_per_instruction
== 0)
17409 lh
->maximum_ops_per_instruction
= 1;
17410 complaint (&symfile_complaints
,
17411 _("invalid maximum_ops_per_instruction "
17412 "in `.debug_line' section"));
17415 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
17417 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
17419 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
17421 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
17423 lh
->standard_opcode_lengths
= XNEWVEC (unsigned char, lh
->opcode_base
);
17425 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
17426 for (i
= 1; i
< lh
->opcode_base
; ++i
)
17428 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
17432 /* Read directory table. */
17433 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
17435 line_ptr
+= bytes_read
;
17436 add_include_dir (lh
, cur_dir
);
17438 line_ptr
+= bytes_read
;
17440 /* Read file name table. */
17441 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
17443 unsigned int dir_index
, mod_time
, length
;
17445 line_ptr
+= bytes_read
;
17446 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17447 line_ptr
+= bytes_read
;
17448 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17449 line_ptr
+= bytes_read
;
17450 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17451 line_ptr
+= bytes_read
;
17453 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
17455 line_ptr
+= bytes_read
;
17456 lh
->statement_program_start
= line_ptr
;
17458 if (line_ptr
> (section
->buffer
+ section
->size
))
17459 complaint (&symfile_complaints
,
17460 _("line number info header doesn't "
17461 "fit in `.debug_line' section"));
17463 discard_cleanups (back_to
);
17467 /* Subroutine of dwarf_decode_lines to simplify it.
17468 Return the file name of the psymtab for included file FILE_INDEX
17469 in line header LH of PST.
17470 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
17471 If space for the result is malloc'd, it will be freed by a cleanup.
17472 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename.
17474 The function creates dangling cleanup registration. */
17476 static const char *
17477 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
17478 const struct partial_symtab
*pst
,
17479 const char *comp_dir
)
17481 const struct file_entry fe
= lh
->file_names
[file_index
];
17482 const char *include_name
= fe
.name
;
17483 const char *include_name_to_compare
= include_name
;
17484 const char *dir_name
= NULL
;
17485 const char *pst_filename
;
17486 char *copied_name
= NULL
;
17489 if (fe
.dir_index
&& lh
->include_dirs
!= NULL
)
17490 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
17492 if (!IS_ABSOLUTE_PATH (include_name
)
17493 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
17495 /* Avoid creating a duplicate psymtab for PST.
17496 We do this by comparing INCLUDE_NAME and PST_FILENAME.
17497 Before we do the comparison, however, we need to account
17498 for DIR_NAME and COMP_DIR.
17499 First prepend dir_name (if non-NULL). If we still don't
17500 have an absolute path prepend comp_dir (if non-NULL).
17501 However, the directory we record in the include-file's
17502 psymtab does not contain COMP_DIR (to match the
17503 corresponding symtab(s)).
17508 bash$ gcc -g ./hello.c
17509 include_name = "hello.c"
17511 DW_AT_comp_dir = comp_dir = "/tmp"
17512 DW_AT_name = "./hello.c"
17516 if (dir_name
!= NULL
)
17518 char *tem
= concat (dir_name
, SLASH_STRING
,
17519 include_name
, (char *)NULL
);
17521 make_cleanup (xfree
, tem
);
17522 include_name
= tem
;
17523 include_name_to_compare
= include_name
;
17525 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
17527 char *tem
= concat (comp_dir
, SLASH_STRING
,
17528 include_name
, (char *)NULL
);
17530 make_cleanup (xfree
, tem
);
17531 include_name_to_compare
= tem
;
17535 pst_filename
= pst
->filename
;
17536 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
17538 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
17539 pst_filename
, (char *)NULL
);
17540 pst_filename
= copied_name
;
17543 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
17545 if (copied_name
!= NULL
)
17546 xfree (copied_name
);
17550 return include_name
;
17553 /* State machine to track the state of the line number program. */
17557 /* These are part of the standard DWARF line number state machine. */
17559 unsigned char op_index
;
17564 unsigned int discriminator
;
17566 /* Additional bits of state we need to track. */
17568 /* The last file that we called dwarf2_start_subfile for.
17569 This is only used for TLLs. */
17570 unsigned int last_file
;
17571 /* The last file a line number was recorded for. */
17572 struct subfile
*last_subfile
;
17574 /* The function to call to record a line. */
17575 record_line_ftype
*record_line
;
17577 /* The last line number that was recorded, used to coalesce
17578 consecutive entries for the same line. This can happen, for
17579 example, when discriminators are present. PR 17276. */
17580 unsigned int last_line
;
17581 int line_has_non_zero_discriminator
;
17582 } lnp_state_machine
;
17584 /* There's a lot of static state to pass to dwarf_record_line.
17585 This keeps it all together. */
17590 struct gdbarch
*gdbarch
;
17592 /* The line number header. */
17593 struct line_header
*line_header
;
17595 /* Non-zero if we're recording lines.
17596 Otherwise we're building partial symtabs and are just interested in
17597 finding include files mentioned by the line number program. */
17598 int record_lines_p
;
17599 } lnp_reader_state
;
17601 /* Ignore this record_line request. */
17604 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
17609 /* Return non-zero if we should add LINE to the line number table.
17610 LINE is the line to add, LAST_LINE is the last line that was added,
17611 LAST_SUBFILE is the subfile for LAST_LINE.
17612 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
17613 had a non-zero discriminator.
17615 We have to be careful in the presence of discriminators.
17616 E.g., for this line:
17618 for (i = 0; i < 100000; i++);
17620 clang can emit four line number entries for that one line,
17621 each with a different discriminator.
17622 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
17624 However, we want gdb to coalesce all four entries into one.
17625 Otherwise the user could stepi into the middle of the line and
17626 gdb would get confused about whether the pc really was in the
17627 middle of the line.
17629 Things are further complicated by the fact that two consecutive
17630 line number entries for the same line is a heuristic used by gcc
17631 to denote the end of the prologue. So we can't just discard duplicate
17632 entries, we have to be selective about it. The heuristic we use is
17633 that we only collapse consecutive entries for the same line if at least
17634 one of those entries has a non-zero discriminator. PR 17276.
17636 Note: Addresses in the line number state machine can never go backwards
17637 within one sequence, thus this coalescing is ok. */
17640 dwarf_record_line_p (unsigned int line
, unsigned int last_line
,
17641 int line_has_non_zero_discriminator
,
17642 struct subfile
*last_subfile
)
17644 if (current_subfile
!= last_subfile
)
17646 if (line
!= last_line
)
17648 /* Same line for the same file that we've seen already.
17649 As a last check, for pr 17276, only record the line if the line
17650 has never had a non-zero discriminator. */
17651 if (!line_has_non_zero_discriminator
)
17656 /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS
17657 in the line table of subfile SUBFILE. */
17660 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
17661 unsigned int line
, CORE_ADDR address
,
17662 record_line_ftype p_record_line
)
17664 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
17666 if (dwarf_line_debug
)
17668 fprintf_unfiltered (gdb_stdlog
,
17669 "Recording line %u, file %s, address %s\n",
17670 line
, lbasename (subfile
->name
),
17671 paddress (gdbarch
, address
));
17674 (*p_record_line
) (subfile
, line
, addr
);
17677 /* Subroutine of dwarf_decode_lines_1 to simplify it.
17678 Mark the end of a set of line number records.
17679 The arguments are the same as for dwarf_record_line_1.
17680 If SUBFILE is NULL the request is ignored. */
17683 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
17684 CORE_ADDR address
, record_line_ftype p_record_line
)
17686 if (subfile
== NULL
)
17689 if (dwarf_line_debug
)
17691 fprintf_unfiltered (gdb_stdlog
,
17692 "Finishing current line, file %s, address %s\n",
17693 lbasename (subfile
->name
),
17694 paddress (gdbarch
, address
));
17697 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, p_record_line
);
17700 /* Record the line in STATE.
17701 END_SEQUENCE is non-zero if we're processing the end of a sequence. */
17704 dwarf_record_line (lnp_reader_state
*reader
, lnp_state_machine
*state
,
17707 const struct line_header
*lh
= reader
->line_header
;
17708 unsigned int file
, line
, discriminator
;
17711 file
= state
->file
;
17712 line
= state
->line
;
17713 is_stmt
= state
->is_stmt
;
17714 discriminator
= state
->discriminator
;
17716 if (dwarf_line_debug
)
17718 fprintf_unfiltered (gdb_stdlog
,
17719 "Processing actual line %u: file %u,"
17720 " address %s, is_stmt %u, discrim %u\n",
17722 paddress (reader
->gdbarch
, state
->address
),
17723 is_stmt
, discriminator
);
17726 if (file
== 0 || file
- 1 >= lh
->num_file_names
)
17727 dwarf2_debug_line_missing_file_complaint ();
17728 /* For now we ignore lines not starting on an instruction boundary.
17729 But not when processing end_sequence for compatibility with the
17730 previous version of the code. */
17731 else if (state
->op_index
== 0 || end_sequence
)
17733 lh
->file_names
[file
- 1].included_p
= 1;
17734 if (reader
->record_lines_p
&& is_stmt
)
17736 if (state
->last_subfile
!= current_subfile
|| end_sequence
)
17738 dwarf_finish_line (reader
->gdbarch
, state
->last_subfile
,
17739 state
->address
, state
->record_line
);
17744 if (dwarf_record_line_p (line
, state
->last_line
,
17745 state
->line_has_non_zero_discriminator
,
17746 state
->last_subfile
))
17748 dwarf_record_line_1 (reader
->gdbarch
, current_subfile
,
17749 line
, state
->address
,
17750 state
->record_line
);
17752 state
->last_subfile
= current_subfile
;
17753 state
->last_line
= line
;
17759 /* Initialize STATE for the start of a line number program. */
17762 init_lnp_state_machine (lnp_state_machine
*state
,
17763 const lnp_reader_state
*reader
)
17765 memset (state
, 0, sizeof (*state
));
17767 /* Just starting, there is no "last file". */
17768 state
->last_file
= 0;
17769 state
->last_subfile
= NULL
;
17771 state
->record_line
= record_line
;
17773 state
->last_line
= 0;
17774 state
->line_has_non_zero_discriminator
= 0;
17776 /* Initialize these according to the DWARF spec. */
17777 state
->op_index
= 0;
17780 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
17781 was a line entry for it so that the backend has a chance to adjust it
17782 and also record it in case it needs it. This is currently used by MIPS
17783 code, cf. `mips_adjust_dwarf2_line'. */
17784 state
->address
= gdbarch_adjust_dwarf2_line (reader
->gdbarch
, 0, 0);
17785 state
->is_stmt
= reader
->line_header
->default_is_stmt
;
17786 state
->discriminator
= 0;
17789 /* Check address and if invalid nop-out the rest of the lines in this
17793 check_line_address (struct dwarf2_cu
*cu
, lnp_state_machine
*state
,
17794 const gdb_byte
*line_ptr
,
17795 CORE_ADDR lowpc
, CORE_ADDR address
)
17797 /* If address < lowpc then it's not a usable value, it's outside the
17798 pc range of the CU. However, we restrict the test to only address
17799 values of zero to preserve GDB's previous behaviour which is to
17800 handle the specific case of a function being GC'd by the linker. */
17802 if (address
== 0 && address
< lowpc
)
17804 /* This line table is for a function which has been
17805 GCd by the linker. Ignore it. PR gdb/12528 */
17807 struct objfile
*objfile
= cu
->objfile
;
17808 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
17810 complaint (&symfile_complaints
,
17811 _(".debug_line address at offset 0x%lx is 0 [in module %s]"),
17812 line_offset
, objfile_name (objfile
));
17813 state
->record_line
= noop_record_line
;
17814 /* Note: sm.record_line is left as noop_record_line
17815 until we see DW_LNE_end_sequence. */
17819 /* Subroutine of dwarf_decode_lines to simplify it.
17820 Process the line number information in LH.
17821 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
17822 program in order to set included_p for every referenced header. */
17825 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
17826 const int decode_for_pst_p
, CORE_ADDR lowpc
)
17828 const gdb_byte
*line_ptr
, *extended_end
;
17829 const gdb_byte
*line_end
;
17830 unsigned int bytes_read
, extended_len
;
17831 unsigned char op_code
, extended_op
;
17832 CORE_ADDR baseaddr
;
17833 struct objfile
*objfile
= cu
->objfile
;
17834 bfd
*abfd
= objfile
->obfd
;
17835 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17836 /* Non-zero if we're recording line info (as opposed to building partial
17838 int record_lines_p
= !decode_for_pst_p
;
17839 /* A collection of things we need to pass to dwarf_record_line. */
17840 lnp_reader_state reader_state
;
17842 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
17844 line_ptr
= lh
->statement_program_start
;
17845 line_end
= lh
->statement_program_end
;
17847 reader_state
.gdbarch
= gdbarch
;
17848 reader_state
.line_header
= lh
;
17849 reader_state
.record_lines_p
= record_lines_p
;
17851 /* Read the statement sequences until there's nothing left. */
17852 while (line_ptr
< line_end
)
17854 /* The DWARF line number program state machine. */
17855 lnp_state_machine state_machine
;
17856 int end_sequence
= 0;
17858 /* Reset the state machine at the start of each sequence. */
17859 init_lnp_state_machine (&state_machine
, &reader_state
);
17861 if (record_lines_p
&& lh
->num_file_names
>= state_machine
.file
)
17863 /* Start a subfile for the current file of the state machine. */
17864 /* lh->include_dirs and lh->file_names are 0-based, but the
17865 directory and file name numbers in the statement program
17867 struct file_entry
*fe
= &lh
->file_names
[state_machine
.file
- 1];
17868 const char *dir
= NULL
;
17870 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
17871 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17873 dwarf2_start_subfile (fe
->name
, dir
);
17876 /* Decode the table. */
17877 while (line_ptr
< line_end
&& !end_sequence
)
17879 op_code
= read_1_byte (abfd
, line_ptr
);
17882 if (op_code
>= lh
->opcode_base
)
17884 /* Special opcode. */
17885 unsigned char adj_opcode
;
17886 CORE_ADDR addr_adj
;
17889 adj_opcode
= op_code
- lh
->opcode_base
;
17890 addr_adj
= (((state_machine
.op_index
17891 + (adj_opcode
/ lh
->line_range
))
17892 / lh
->maximum_ops_per_instruction
)
17893 * lh
->minimum_instruction_length
);
17894 state_machine
.address
17895 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17896 state_machine
.op_index
= ((state_machine
.op_index
17897 + (adj_opcode
/ lh
->line_range
))
17898 % lh
->maximum_ops_per_instruction
);
17899 line_delta
= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
17900 state_machine
.line
+= line_delta
;
17901 if (line_delta
!= 0)
17902 state_machine
.line_has_non_zero_discriminator
17903 = state_machine
.discriminator
!= 0;
17905 dwarf_record_line (&reader_state
, &state_machine
, 0);
17906 state_machine
.discriminator
= 0;
17908 else switch (op_code
)
17910 case DW_LNS_extended_op
:
17911 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
17913 line_ptr
+= bytes_read
;
17914 extended_end
= line_ptr
+ extended_len
;
17915 extended_op
= read_1_byte (abfd
, line_ptr
);
17917 switch (extended_op
)
17919 case DW_LNE_end_sequence
:
17920 state_machine
.record_line
= record_line
;
17923 case DW_LNE_set_address
:
17926 = read_address (abfd
, line_ptr
, cu
, &bytes_read
);
17928 line_ptr
+= bytes_read
;
17929 check_line_address (cu
, &state_machine
, line_ptr
,
17931 state_machine
.op_index
= 0;
17932 address
+= baseaddr
;
17933 state_machine
.address
17934 = gdbarch_adjust_dwarf2_line (gdbarch
, address
, 0);
17937 case DW_LNE_define_file
:
17939 const char *cur_file
;
17940 unsigned int dir_index
, mod_time
, length
;
17942 cur_file
= read_direct_string (abfd
, line_ptr
,
17944 line_ptr
+= bytes_read
;
17946 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17947 line_ptr
+= bytes_read
;
17949 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17950 line_ptr
+= bytes_read
;
17952 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17953 line_ptr
+= bytes_read
;
17954 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
17957 case DW_LNE_set_discriminator
:
17958 /* The discriminator is not interesting to the debugger;
17959 just ignore it. We still need to check its value though:
17960 if there are consecutive entries for the same
17961 (non-prologue) line we want to coalesce them.
17963 state_machine
.discriminator
17964 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17965 state_machine
.line_has_non_zero_discriminator
17966 |= state_machine
.discriminator
!= 0;
17967 line_ptr
+= bytes_read
;
17970 complaint (&symfile_complaints
,
17971 _("mangled .debug_line section"));
17974 /* Make sure that we parsed the extended op correctly. If e.g.
17975 we expected a different address size than the producer used,
17976 we may have read the wrong number of bytes. */
17977 if (line_ptr
!= extended_end
)
17979 complaint (&symfile_complaints
,
17980 _("mangled .debug_line section"));
17985 dwarf_record_line (&reader_state
, &state_machine
, 0);
17986 state_machine
.discriminator
= 0;
17988 case DW_LNS_advance_pc
:
17991 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17992 CORE_ADDR addr_adj
;
17994 addr_adj
= (((state_machine
.op_index
+ adjust
)
17995 / lh
->maximum_ops_per_instruction
)
17996 * lh
->minimum_instruction_length
);
17997 state_machine
.address
17998 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17999 state_machine
.op_index
= ((state_machine
.op_index
+ adjust
)
18000 % lh
->maximum_ops_per_instruction
);
18001 line_ptr
+= bytes_read
;
18004 case DW_LNS_advance_line
:
18007 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
18009 state_machine
.line
+= line_delta
;
18010 if (line_delta
!= 0)
18011 state_machine
.line_has_non_zero_discriminator
18012 = state_machine
.discriminator
!= 0;
18013 line_ptr
+= bytes_read
;
18016 case DW_LNS_set_file
:
18018 /* The arrays lh->include_dirs and lh->file_names are
18019 0-based, but the directory and file name numbers in
18020 the statement program are 1-based. */
18021 struct file_entry
*fe
;
18022 const char *dir
= NULL
;
18024 state_machine
.file
= read_unsigned_leb128 (abfd
, line_ptr
,
18026 line_ptr
+= bytes_read
;
18027 if (state_machine
.file
== 0
18028 || state_machine
.file
- 1 >= lh
->num_file_names
)
18029 dwarf2_debug_line_missing_file_complaint ();
18032 fe
= &lh
->file_names
[state_machine
.file
- 1];
18033 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
18034 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
18035 if (record_lines_p
)
18037 state_machine
.last_subfile
= current_subfile
;
18038 state_machine
.line_has_non_zero_discriminator
18039 = state_machine
.discriminator
!= 0;
18040 dwarf2_start_subfile (fe
->name
, dir
);
18045 case DW_LNS_set_column
:
18046 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18047 line_ptr
+= bytes_read
;
18049 case DW_LNS_negate_stmt
:
18050 state_machine
.is_stmt
= (!state_machine
.is_stmt
);
18052 case DW_LNS_set_basic_block
:
18054 /* Add to the address register of the state machine the
18055 address increment value corresponding to special opcode
18056 255. I.e., this value is scaled by the minimum
18057 instruction length since special opcode 255 would have
18058 scaled the increment. */
18059 case DW_LNS_const_add_pc
:
18061 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
18062 CORE_ADDR addr_adj
;
18064 addr_adj
= (((state_machine
.op_index
+ adjust
)
18065 / lh
->maximum_ops_per_instruction
)
18066 * lh
->minimum_instruction_length
);
18067 state_machine
.address
18068 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
18069 state_machine
.op_index
= ((state_machine
.op_index
+ adjust
)
18070 % lh
->maximum_ops_per_instruction
);
18073 case DW_LNS_fixed_advance_pc
:
18075 CORE_ADDR addr_adj
;
18077 addr_adj
= read_2_bytes (abfd
, line_ptr
);
18078 state_machine
.address
18079 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
18080 state_machine
.op_index
= 0;
18086 /* Unknown standard opcode, ignore it. */
18089 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
18091 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18092 line_ptr
+= bytes_read
;
18099 dwarf2_debug_line_missing_end_sequence_complaint ();
18101 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
18102 in which case we still finish recording the last line). */
18103 dwarf_record_line (&reader_state
, &state_machine
, 1);
18107 /* Decode the Line Number Program (LNP) for the given line_header
18108 structure and CU. The actual information extracted and the type
18109 of structures created from the LNP depends on the value of PST.
18111 1. If PST is NULL, then this procedure uses the data from the program
18112 to create all necessary symbol tables, and their linetables.
18114 2. If PST is not NULL, this procedure reads the program to determine
18115 the list of files included by the unit represented by PST, and
18116 builds all the associated partial symbol tables.
18118 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
18119 It is used for relative paths in the line table.
18120 NOTE: When processing partial symtabs (pst != NULL),
18121 comp_dir == pst->dirname.
18123 NOTE: It is important that psymtabs have the same file name (via strcmp)
18124 as the corresponding symtab. Since COMP_DIR is not used in the name of the
18125 symtab we don't use it in the name of the psymtabs we create.
18126 E.g. expand_line_sal requires this when finding psymtabs to expand.
18127 A good testcase for this is mb-inline.exp.
18129 LOWPC is the lowest address in CU (or 0 if not known).
18131 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
18132 for its PC<->lines mapping information. Otherwise only the filename
18133 table is read in. */
18136 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
18137 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
18138 CORE_ADDR lowpc
, int decode_mapping
)
18140 struct objfile
*objfile
= cu
->objfile
;
18141 const int decode_for_pst_p
= (pst
!= NULL
);
18143 if (decode_mapping
)
18144 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
18146 if (decode_for_pst_p
)
18150 /* Now that we're done scanning the Line Header Program, we can
18151 create the psymtab of each included file. */
18152 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
18153 if (lh
->file_names
[file_index
].included_p
== 1)
18155 const char *include_name
=
18156 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
18157 if (include_name
!= NULL
)
18158 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
18163 /* Make sure a symtab is created for every file, even files
18164 which contain only variables (i.e. no code with associated
18166 struct compunit_symtab
*cust
= buildsym_compunit_symtab ();
18169 for (i
= 0; i
< lh
->num_file_names
; i
++)
18171 const char *dir
= NULL
;
18172 struct file_entry
*fe
;
18174 fe
= &lh
->file_names
[i
];
18175 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
18176 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
18177 dwarf2_start_subfile (fe
->name
, dir
);
18179 if (current_subfile
->symtab
== NULL
)
18181 current_subfile
->symtab
18182 = allocate_symtab (cust
, current_subfile
->name
);
18184 fe
->symtab
= current_subfile
->symtab
;
18189 /* Start a subfile for DWARF. FILENAME is the name of the file and
18190 DIRNAME the name of the source directory which contains FILENAME
18191 or NULL if not known.
18192 This routine tries to keep line numbers from identical absolute and
18193 relative file names in a common subfile.
18195 Using the `list' example from the GDB testsuite, which resides in
18196 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
18197 of /srcdir/list0.c yields the following debugging information for list0.c:
18199 DW_AT_name: /srcdir/list0.c
18200 DW_AT_comp_dir: /compdir
18201 files.files[0].name: list0.h
18202 files.files[0].dir: /srcdir
18203 files.files[1].name: list0.c
18204 files.files[1].dir: /srcdir
18206 The line number information for list0.c has to end up in a single
18207 subfile, so that `break /srcdir/list0.c:1' works as expected.
18208 start_subfile will ensure that this happens provided that we pass the
18209 concatenation of files.files[1].dir and files.files[1].name as the
18213 dwarf2_start_subfile (const char *filename
, const char *dirname
)
18217 /* In order not to lose the line information directory,
18218 we concatenate it to the filename when it makes sense.
18219 Note that the Dwarf3 standard says (speaking of filenames in line
18220 information): ``The directory index is ignored for file names
18221 that represent full path names''. Thus ignoring dirname in the
18222 `else' branch below isn't an issue. */
18224 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
18226 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
18230 start_subfile (filename
);
18236 /* Start a symtab for DWARF.
18237 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
18239 static struct compunit_symtab
*
18240 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
18241 const char *name
, const char *comp_dir
, CORE_ADDR low_pc
)
18243 struct compunit_symtab
*cust
18244 = start_symtab (cu
->objfile
, name
, comp_dir
, low_pc
);
18246 record_debugformat ("DWARF 2");
18247 record_producer (cu
->producer
);
18249 /* We assume that we're processing GCC output. */
18250 processing_gcc_compilation
= 2;
18252 cu
->processing_has_namespace_info
= 0;
18258 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
18259 struct dwarf2_cu
*cu
)
18261 struct objfile
*objfile
= cu
->objfile
;
18262 struct comp_unit_head
*cu_header
= &cu
->header
;
18264 /* NOTE drow/2003-01-30: There used to be a comment and some special
18265 code here to turn a symbol with DW_AT_external and a
18266 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
18267 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
18268 with some versions of binutils) where shared libraries could have
18269 relocations against symbols in their debug information - the
18270 minimal symbol would have the right address, but the debug info
18271 would not. It's no longer necessary, because we will explicitly
18272 apply relocations when we read in the debug information now. */
18274 /* A DW_AT_location attribute with no contents indicates that a
18275 variable has been optimized away. */
18276 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
18278 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
18282 /* Handle one degenerate form of location expression specially, to
18283 preserve GDB's previous behavior when section offsets are
18284 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
18285 then mark this symbol as LOC_STATIC. */
18287 if (attr_form_is_block (attr
)
18288 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
18289 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
18290 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
18291 && (DW_BLOCK (attr
)->size
18292 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
18294 unsigned int dummy
;
18296 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
18297 SYMBOL_VALUE_ADDRESS (sym
) =
18298 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
18300 SYMBOL_VALUE_ADDRESS (sym
) =
18301 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
18302 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
18303 fixup_symbol_section (sym
, objfile
);
18304 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
18305 SYMBOL_SECTION (sym
));
18309 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
18310 expression evaluator, and use LOC_COMPUTED only when necessary
18311 (i.e. when the value of a register or memory location is
18312 referenced, or a thread-local block, etc.). Then again, it might
18313 not be worthwhile. I'm assuming that it isn't unless performance
18314 or memory numbers show me otherwise. */
18316 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
18318 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
18319 cu
->has_loclist
= 1;
18322 /* Given a pointer to a DWARF information entry, figure out if we need
18323 to make a symbol table entry for it, and if so, create a new entry
18324 and return a pointer to it.
18325 If TYPE is NULL, determine symbol type from the die, otherwise
18326 used the passed type.
18327 If SPACE is not NULL, use it to hold the new symbol. If it is
18328 NULL, allocate a new symbol on the objfile's obstack. */
18330 static struct symbol
*
18331 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
18332 struct symbol
*space
)
18334 struct objfile
*objfile
= cu
->objfile
;
18335 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18336 struct symbol
*sym
= NULL
;
18338 struct attribute
*attr
= NULL
;
18339 struct attribute
*attr2
= NULL
;
18340 CORE_ADDR baseaddr
;
18341 struct pending
**list_to_add
= NULL
;
18343 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
18345 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
18347 name
= dwarf2_name (die
, cu
);
18350 const char *linkagename
;
18351 int suppress_add
= 0;
18356 sym
= allocate_symbol (objfile
);
18357 OBJSTAT (objfile
, n_syms
++);
18359 /* Cache this symbol's name and the name's demangled form (if any). */
18360 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
18361 linkagename
= dwarf2_physname (name
, die
, cu
);
18362 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
18364 /* Fortran does not have mangling standard and the mangling does differ
18365 between gfortran, iFort etc. */
18366 if (cu
->language
== language_fortran
18367 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
18368 symbol_set_demangled_name (&(sym
->ginfo
),
18369 dwarf2_full_name (name
, die
, cu
),
18372 /* Default assumptions.
18373 Use the passed type or decode it from the die. */
18374 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18375 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
18377 SYMBOL_TYPE (sym
) = type
;
18379 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
18380 attr
= dwarf2_attr (die
,
18381 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
18385 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
18388 attr
= dwarf2_attr (die
,
18389 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
18393 int file_index
= DW_UNSND (attr
);
18395 if (cu
->line_header
== NULL
18396 || file_index
> cu
->line_header
->num_file_names
)
18397 complaint (&symfile_complaints
,
18398 _("file index out of range"));
18399 else if (file_index
> 0)
18401 struct file_entry
*fe
;
18403 fe
= &cu
->line_header
->file_names
[file_index
- 1];
18404 symbol_set_symtab (sym
, fe
->symtab
);
18411 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
18416 addr
= attr_value_as_address (attr
);
18417 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
18418 SYMBOL_VALUE_ADDRESS (sym
) = addr
;
18420 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
18421 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
18422 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
18423 add_symbol_to_list (sym
, cu
->list_in_scope
);
18425 case DW_TAG_subprogram
:
18426 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
18428 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
18429 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18430 if ((attr2
&& (DW_UNSND (attr2
) != 0))
18431 || cu
->language
== language_ada
)
18433 /* Subprograms marked external are stored as a global symbol.
18434 Ada subprograms, whether marked external or not, are always
18435 stored as a global symbol, because we want to be able to
18436 access them globally. For instance, we want to be able
18437 to break on a nested subprogram without having to
18438 specify the context. */
18439 list_to_add
= &global_symbols
;
18443 list_to_add
= cu
->list_in_scope
;
18446 case DW_TAG_inlined_subroutine
:
18447 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
18449 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
18450 SYMBOL_INLINED (sym
) = 1;
18451 list_to_add
= cu
->list_in_scope
;
18453 case DW_TAG_template_value_param
:
18455 /* Fall through. */
18456 case DW_TAG_constant
:
18457 case DW_TAG_variable
:
18458 case DW_TAG_member
:
18459 /* Compilation with minimal debug info may result in
18460 variables with missing type entries. Change the
18461 misleading `void' type to something sensible. */
18462 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
18464 = objfile_type (objfile
)->nodebug_data_symbol
;
18466 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18467 /* In the case of DW_TAG_member, we should only be called for
18468 static const members. */
18469 if (die
->tag
== DW_TAG_member
)
18471 /* dwarf2_add_field uses die_is_declaration,
18472 so we do the same. */
18473 gdb_assert (die_is_declaration (die
, cu
));
18478 dwarf2_const_value (attr
, sym
, cu
);
18479 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18482 if (attr2
&& (DW_UNSND (attr2
) != 0))
18483 list_to_add
= &global_symbols
;
18485 list_to_add
= cu
->list_in_scope
;
18489 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
18492 var_decode_location (attr
, sym
, cu
);
18493 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18495 /* Fortran explicitly imports any global symbols to the local
18496 scope by DW_TAG_common_block. */
18497 if (cu
->language
== language_fortran
&& die
->parent
18498 && die
->parent
->tag
== DW_TAG_common_block
)
18501 if (SYMBOL_CLASS (sym
) == LOC_STATIC
18502 && SYMBOL_VALUE_ADDRESS (sym
) == 0
18503 && !dwarf2_per_objfile
->has_section_at_zero
)
18505 /* When a static variable is eliminated by the linker,
18506 the corresponding debug information is not stripped
18507 out, but the variable address is set to null;
18508 do not add such variables into symbol table. */
18510 else if (attr2
&& (DW_UNSND (attr2
) != 0))
18512 /* Workaround gfortran PR debug/40040 - it uses
18513 DW_AT_location for variables in -fPIC libraries which may
18514 get overriden by other libraries/executable and get
18515 a different address. Resolve it by the minimal symbol
18516 which may come from inferior's executable using copy
18517 relocation. Make this workaround only for gfortran as for
18518 other compilers GDB cannot guess the minimal symbol
18519 Fortran mangling kind. */
18520 if (cu
->language
== language_fortran
&& die
->parent
18521 && die
->parent
->tag
== DW_TAG_module
18523 && startswith (cu
->producer
, "GNU Fortran"))
18524 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
18526 /* A variable with DW_AT_external is never static,
18527 but it may be block-scoped. */
18528 list_to_add
= (cu
->list_in_scope
== &file_symbols
18529 ? &global_symbols
: cu
->list_in_scope
);
18532 list_to_add
= cu
->list_in_scope
;
18536 /* We do not know the address of this symbol.
18537 If it is an external symbol and we have type information
18538 for it, enter the symbol as a LOC_UNRESOLVED symbol.
18539 The address of the variable will then be determined from
18540 the minimal symbol table whenever the variable is
18542 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18544 /* Fortran explicitly imports any global symbols to the local
18545 scope by DW_TAG_common_block. */
18546 if (cu
->language
== language_fortran
&& die
->parent
18547 && die
->parent
->tag
== DW_TAG_common_block
)
18549 /* SYMBOL_CLASS doesn't matter here because
18550 read_common_block is going to reset it. */
18552 list_to_add
= cu
->list_in_scope
;
18554 else if (attr2
&& (DW_UNSND (attr2
) != 0)
18555 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
18557 /* A variable with DW_AT_external is never static, but it
18558 may be block-scoped. */
18559 list_to_add
= (cu
->list_in_scope
== &file_symbols
18560 ? &global_symbols
: cu
->list_in_scope
);
18562 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
18564 else if (!die_is_declaration (die
, cu
))
18566 /* Use the default LOC_OPTIMIZED_OUT class. */
18567 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
18569 list_to_add
= cu
->list_in_scope
;
18573 case DW_TAG_formal_parameter
:
18574 /* If we are inside a function, mark this as an argument. If
18575 not, we might be looking at an argument to an inlined function
18576 when we do not have enough information to show inlined frames;
18577 pretend it's a local variable in that case so that the user can
18579 if (context_stack_depth
> 0
18580 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
18581 SYMBOL_IS_ARGUMENT (sym
) = 1;
18582 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
18585 var_decode_location (attr
, sym
, cu
);
18587 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18590 dwarf2_const_value (attr
, sym
, cu
);
18593 list_to_add
= cu
->list_in_scope
;
18595 case DW_TAG_unspecified_parameters
:
18596 /* From varargs functions; gdb doesn't seem to have any
18597 interest in this information, so just ignore it for now.
18600 case DW_TAG_template_type_param
:
18602 /* Fall through. */
18603 case DW_TAG_class_type
:
18604 case DW_TAG_interface_type
:
18605 case DW_TAG_structure_type
:
18606 case DW_TAG_union_type
:
18607 case DW_TAG_set_type
:
18608 case DW_TAG_enumeration_type
:
18609 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18610 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
18613 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
18614 really ever be static objects: otherwise, if you try
18615 to, say, break of a class's method and you're in a file
18616 which doesn't mention that class, it won't work unless
18617 the check for all static symbols in lookup_symbol_aux
18618 saves you. See the OtherFileClass tests in
18619 gdb.c++/namespace.exp. */
18623 list_to_add
= (cu
->list_in_scope
== &file_symbols
18624 && cu
->language
== language_cplus
18625 ? &global_symbols
: cu
->list_in_scope
);
18627 /* The semantics of C++ state that "struct foo {
18628 ... }" also defines a typedef for "foo". */
18629 if (cu
->language
== language_cplus
18630 || cu
->language
== language_ada
18631 || cu
->language
== language_d
18632 || cu
->language
== language_rust
)
18634 /* The symbol's name is already allocated along
18635 with this objfile, so we don't need to
18636 duplicate it for the type. */
18637 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
18638 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
18643 case DW_TAG_typedef
:
18644 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18645 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18646 list_to_add
= cu
->list_in_scope
;
18648 case DW_TAG_base_type
:
18649 case DW_TAG_subrange_type
:
18650 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18651 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18652 list_to_add
= cu
->list_in_scope
;
18654 case DW_TAG_enumerator
:
18655 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18658 dwarf2_const_value (attr
, sym
, cu
);
18661 /* NOTE: carlton/2003-11-10: See comment above in the
18662 DW_TAG_class_type, etc. block. */
18664 list_to_add
= (cu
->list_in_scope
== &file_symbols
18665 && cu
->language
== language_cplus
18666 ? &global_symbols
: cu
->list_in_scope
);
18669 case DW_TAG_imported_declaration
:
18670 case DW_TAG_namespace
:
18671 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18672 list_to_add
= &global_symbols
;
18674 case DW_TAG_module
:
18675 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18676 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
18677 list_to_add
= &global_symbols
;
18679 case DW_TAG_common_block
:
18680 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
18681 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
18682 add_symbol_to_list (sym
, cu
->list_in_scope
);
18685 /* Not a tag we recognize. Hopefully we aren't processing
18686 trash data, but since we must specifically ignore things
18687 we don't recognize, there is nothing else we should do at
18689 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
18690 dwarf_tag_name (die
->tag
));
18696 sym
->hash_next
= objfile
->template_symbols
;
18697 objfile
->template_symbols
= sym
;
18698 list_to_add
= NULL
;
18701 if (list_to_add
!= NULL
)
18702 add_symbol_to_list (sym
, list_to_add
);
18704 /* For the benefit of old versions of GCC, check for anonymous
18705 namespaces based on the demangled name. */
18706 if (!cu
->processing_has_namespace_info
18707 && cu
->language
== language_cplus
)
18708 cp_scan_for_anonymous_namespaces (sym
, objfile
);
18713 /* A wrapper for new_symbol_full that always allocates a new symbol. */
18715 static struct symbol
*
18716 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
18718 return new_symbol_full (die
, type
, cu
, NULL
);
18721 /* Given an attr with a DW_FORM_dataN value in host byte order,
18722 zero-extend it as appropriate for the symbol's type. The DWARF
18723 standard (v4) is not entirely clear about the meaning of using
18724 DW_FORM_dataN for a constant with a signed type, where the type is
18725 wider than the data. The conclusion of a discussion on the DWARF
18726 list was that this is unspecified. We choose to always zero-extend
18727 because that is the interpretation long in use by GCC. */
18730 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
18731 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
18733 struct objfile
*objfile
= cu
->objfile
;
18734 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
18735 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
18736 LONGEST l
= DW_UNSND (attr
);
18738 if (bits
< sizeof (*value
) * 8)
18740 l
&= ((LONGEST
) 1 << bits
) - 1;
18743 else if (bits
== sizeof (*value
) * 8)
18747 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
18748 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
18755 /* Read a constant value from an attribute. Either set *VALUE, or if
18756 the value does not fit in *VALUE, set *BYTES - either already
18757 allocated on the objfile obstack, or newly allocated on OBSTACK,
18758 or, set *BATON, if we translated the constant to a location
18762 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
18763 const char *name
, struct obstack
*obstack
,
18764 struct dwarf2_cu
*cu
,
18765 LONGEST
*value
, const gdb_byte
**bytes
,
18766 struct dwarf2_locexpr_baton
**baton
)
18768 struct objfile
*objfile
= cu
->objfile
;
18769 struct comp_unit_head
*cu_header
= &cu
->header
;
18770 struct dwarf_block
*blk
;
18771 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
18772 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
18778 switch (attr
->form
)
18781 case DW_FORM_GNU_addr_index
:
18785 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
18786 dwarf2_const_value_length_mismatch_complaint (name
,
18787 cu_header
->addr_size
,
18788 TYPE_LENGTH (type
));
18789 /* Symbols of this form are reasonably rare, so we just
18790 piggyback on the existing location code rather than writing
18791 a new implementation of symbol_computed_ops. */
18792 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
18793 (*baton
)->per_cu
= cu
->per_cu
;
18794 gdb_assert ((*baton
)->per_cu
);
18796 (*baton
)->size
= 2 + cu_header
->addr_size
;
18797 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
18798 (*baton
)->data
= data
;
18800 data
[0] = DW_OP_addr
;
18801 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
18802 byte_order
, DW_ADDR (attr
));
18803 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
18806 case DW_FORM_string
:
18808 case DW_FORM_GNU_str_index
:
18809 case DW_FORM_GNU_strp_alt
:
18810 /* DW_STRING is already allocated on the objfile obstack, point
18812 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
18814 case DW_FORM_block1
:
18815 case DW_FORM_block2
:
18816 case DW_FORM_block4
:
18817 case DW_FORM_block
:
18818 case DW_FORM_exprloc
:
18819 blk
= DW_BLOCK (attr
);
18820 if (TYPE_LENGTH (type
) != blk
->size
)
18821 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
18822 TYPE_LENGTH (type
));
18823 *bytes
= blk
->data
;
18826 /* The DW_AT_const_value attributes are supposed to carry the
18827 symbol's value "represented as it would be on the target
18828 architecture." By the time we get here, it's already been
18829 converted to host endianness, so we just need to sign- or
18830 zero-extend it as appropriate. */
18831 case DW_FORM_data1
:
18832 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
18834 case DW_FORM_data2
:
18835 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
18837 case DW_FORM_data4
:
18838 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
18840 case DW_FORM_data8
:
18841 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
18844 case DW_FORM_sdata
:
18845 *value
= DW_SND (attr
);
18848 case DW_FORM_udata
:
18849 *value
= DW_UNSND (attr
);
18853 complaint (&symfile_complaints
,
18854 _("unsupported const value attribute form: '%s'"),
18855 dwarf_form_name (attr
->form
));
18862 /* Copy constant value from an attribute to a symbol. */
18865 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
18866 struct dwarf2_cu
*cu
)
18868 struct objfile
*objfile
= cu
->objfile
;
18870 const gdb_byte
*bytes
;
18871 struct dwarf2_locexpr_baton
*baton
;
18873 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
18874 SYMBOL_PRINT_NAME (sym
),
18875 &objfile
->objfile_obstack
, cu
,
18876 &value
, &bytes
, &baton
);
18880 SYMBOL_LOCATION_BATON (sym
) = baton
;
18881 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
18883 else if (bytes
!= NULL
)
18885 SYMBOL_VALUE_BYTES (sym
) = bytes
;
18886 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
18890 SYMBOL_VALUE (sym
) = value
;
18891 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
18895 /* Return the type of the die in question using its DW_AT_type attribute. */
18897 static struct type
*
18898 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18900 struct attribute
*type_attr
;
18902 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
18905 /* A missing DW_AT_type represents a void type. */
18906 return objfile_type (cu
->objfile
)->builtin_void
;
18909 return lookup_die_type (die
, type_attr
, cu
);
18912 /* True iff CU's producer generates GNAT Ada auxiliary information
18913 that allows to find parallel types through that information instead
18914 of having to do expensive parallel lookups by type name. */
18917 need_gnat_info (struct dwarf2_cu
*cu
)
18919 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
18920 of GNAT produces this auxiliary information, without any indication
18921 that it is produced. Part of enhancing the FSF version of GNAT
18922 to produce that information will be to put in place an indicator
18923 that we can use in order to determine whether the descriptive type
18924 info is available or not. One suggestion that has been made is
18925 to use a new attribute, attached to the CU die. For now, assume
18926 that the descriptive type info is not available. */
18930 /* Return the auxiliary type of the die in question using its
18931 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
18932 attribute is not present. */
18934 static struct type
*
18935 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18937 struct attribute
*type_attr
;
18939 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
18943 return lookup_die_type (die
, type_attr
, cu
);
18946 /* If DIE has a descriptive_type attribute, then set the TYPE's
18947 descriptive type accordingly. */
18950 set_descriptive_type (struct type
*type
, struct die_info
*die
,
18951 struct dwarf2_cu
*cu
)
18953 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
18955 if (descriptive_type
)
18957 ALLOCATE_GNAT_AUX_TYPE (type
);
18958 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
18962 /* Return the containing type of the die in question using its
18963 DW_AT_containing_type attribute. */
18965 static struct type
*
18966 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18968 struct attribute
*type_attr
;
18970 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
18972 error (_("Dwarf Error: Problem turning containing type into gdb type "
18973 "[in module %s]"), objfile_name (cu
->objfile
));
18975 return lookup_die_type (die
, type_attr
, cu
);
18978 /* Return an error marker type to use for the ill formed type in DIE/CU. */
18980 static struct type
*
18981 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
18983 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18984 char *message
, *saved
;
18986 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
18987 objfile_name (objfile
),
18988 cu
->header
.offset
.sect_off
,
18989 die
->offset
.sect_off
);
18990 saved
= (char *) obstack_copy0 (&objfile
->objfile_obstack
,
18991 message
, strlen (message
));
18994 return init_type (objfile
, TYPE_CODE_ERROR
, 0, saved
);
18997 /* Look up the type of DIE in CU using its type attribute ATTR.
18998 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
18999 DW_AT_containing_type.
19000 If there is no type substitute an error marker. */
19002 static struct type
*
19003 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
19004 struct dwarf2_cu
*cu
)
19006 struct objfile
*objfile
= cu
->objfile
;
19007 struct type
*this_type
;
19009 gdb_assert (attr
->name
== DW_AT_type
19010 || attr
->name
== DW_AT_GNAT_descriptive_type
19011 || attr
->name
== DW_AT_containing_type
);
19013 /* First see if we have it cached. */
19015 if (attr
->form
== DW_FORM_GNU_ref_alt
)
19017 struct dwarf2_per_cu_data
*per_cu
;
19018 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
19020 per_cu
= dwarf2_find_containing_comp_unit (offset
, 1, cu
->objfile
);
19021 this_type
= get_die_type_at_offset (offset
, per_cu
);
19023 else if (attr_form_is_ref (attr
))
19025 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
19027 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
19029 else if (attr
->form
== DW_FORM_ref_sig8
)
19031 ULONGEST signature
= DW_SIGNATURE (attr
);
19033 return get_signatured_type (die
, signature
, cu
);
19037 complaint (&symfile_complaints
,
19038 _("Dwarf Error: Bad type attribute %s in DIE"
19039 " at 0x%x [in module %s]"),
19040 dwarf_attr_name (attr
->name
), die
->offset
.sect_off
,
19041 objfile_name (objfile
));
19042 return build_error_marker_type (cu
, die
);
19045 /* If not cached we need to read it in. */
19047 if (this_type
== NULL
)
19049 struct die_info
*type_die
= NULL
;
19050 struct dwarf2_cu
*type_cu
= cu
;
19052 if (attr_form_is_ref (attr
))
19053 type_die
= follow_die_ref (die
, attr
, &type_cu
);
19054 if (type_die
== NULL
)
19055 return build_error_marker_type (cu
, die
);
19056 /* If we find the type now, it's probably because the type came
19057 from an inter-CU reference and the type's CU got expanded before
19059 this_type
= read_type_die (type_die
, type_cu
);
19062 /* If we still don't have a type use an error marker. */
19064 if (this_type
== NULL
)
19065 return build_error_marker_type (cu
, die
);
19070 /* Return the type in DIE, CU.
19071 Returns NULL for invalid types.
19073 This first does a lookup in die_type_hash,
19074 and only reads the die in if necessary.
19076 NOTE: This can be called when reading in partial or full symbols. */
19078 static struct type
*
19079 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
19081 struct type
*this_type
;
19083 this_type
= get_die_type (die
, cu
);
19087 return read_type_die_1 (die
, cu
);
19090 /* Read the type in DIE, CU.
19091 Returns NULL for invalid types. */
19093 static struct type
*
19094 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
19096 struct type
*this_type
= NULL
;
19100 case DW_TAG_class_type
:
19101 case DW_TAG_interface_type
:
19102 case DW_TAG_structure_type
:
19103 case DW_TAG_union_type
:
19104 this_type
= read_structure_type (die
, cu
);
19106 case DW_TAG_enumeration_type
:
19107 this_type
= read_enumeration_type (die
, cu
);
19109 case DW_TAG_subprogram
:
19110 case DW_TAG_subroutine_type
:
19111 case DW_TAG_inlined_subroutine
:
19112 this_type
= read_subroutine_type (die
, cu
);
19114 case DW_TAG_array_type
:
19115 this_type
= read_array_type (die
, cu
);
19117 case DW_TAG_set_type
:
19118 this_type
= read_set_type (die
, cu
);
19120 case DW_TAG_pointer_type
:
19121 this_type
= read_tag_pointer_type (die
, cu
);
19123 case DW_TAG_ptr_to_member_type
:
19124 this_type
= read_tag_ptr_to_member_type (die
, cu
);
19126 case DW_TAG_reference_type
:
19127 this_type
= read_tag_reference_type (die
, cu
);
19129 case DW_TAG_const_type
:
19130 this_type
= read_tag_const_type (die
, cu
);
19132 case DW_TAG_volatile_type
:
19133 this_type
= read_tag_volatile_type (die
, cu
);
19135 case DW_TAG_restrict_type
:
19136 this_type
= read_tag_restrict_type (die
, cu
);
19138 case DW_TAG_string_type
:
19139 this_type
= read_tag_string_type (die
, cu
);
19141 case DW_TAG_typedef
:
19142 this_type
= read_typedef (die
, cu
);
19144 case DW_TAG_subrange_type
:
19145 this_type
= read_subrange_type (die
, cu
);
19147 case DW_TAG_base_type
:
19148 this_type
= read_base_type (die
, cu
);
19150 case DW_TAG_unspecified_type
:
19151 this_type
= read_unspecified_type (die
, cu
);
19153 case DW_TAG_namespace
:
19154 this_type
= read_namespace_type (die
, cu
);
19156 case DW_TAG_module
:
19157 this_type
= read_module_type (die
, cu
);
19159 case DW_TAG_atomic_type
:
19160 this_type
= read_tag_atomic_type (die
, cu
);
19163 complaint (&symfile_complaints
,
19164 _("unexpected tag in read_type_die: '%s'"),
19165 dwarf_tag_name (die
->tag
));
19172 /* See if we can figure out if the class lives in a namespace. We do
19173 this by looking for a member function; its demangled name will
19174 contain namespace info, if there is any.
19175 Return the computed name or NULL.
19176 Space for the result is allocated on the objfile's obstack.
19177 This is the full-die version of guess_partial_die_structure_name.
19178 In this case we know DIE has no useful parent. */
19181 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19183 struct die_info
*spec_die
;
19184 struct dwarf2_cu
*spec_cu
;
19185 struct die_info
*child
;
19188 spec_die
= die_specification (die
, &spec_cu
);
19189 if (spec_die
!= NULL
)
19195 for (child
= die
->child
;
19197 child
= child
->sibling
)
19199 if (child
->tag
== DW_TAG_subprogram
)
19201 const char *linkage_name
;
19203 linkage_name
= dwarf2_string_attr (child
, DW_AT_linkage_name
, cu
);
19204 if (linkage_name
== NULL
)
19205 linkage_name
= dwarf2_string_attr (child
, DW_AT_MIPS_linkage_name
,
19207 if (linkage_name
!= NULL
)
19210 = language_class_name_from_physname (cu
->language_defn
,
19214 if (actual_name
!= NULL
)
19216 const char *die_name
= dwarf2_name (die
, cu
);
19218 if (die_name
!= NULL
19219 && strcmp (die_name
, actual_name
) != 0)
19221 /* Strip off the class name from the full name.
19222 We want the prefix. */
19223 int die_name_len
= strlen (die_name
);
19224 int actual_name_len
= strlen (actual_name
);
19226 /* Test for '::' as a sanity check. */
19227 if (actual_name_len
> die_name_len
+ 2
19228 && actual_name
[actual_name_len
19229 - die_name_len
- 1] == ':')
19230 name
= (char *) obstack_copy0 (
19231 &cu
->objfile
->per_bfd
->storage_obstack
,
19232 actual_name
, actual_name_len
- die_name_len
- 2);
19235 xfree (actual_name
);
19244 /* GCC might emit a nameless typedef that has a linkage name. Determine the
19245 prefix part in such case. See
19246 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
19249 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
19251 struct attribute
*attr
;
19254 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
19255 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
19258 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
19261 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
19263 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
19264 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
19267 /* dwarf2_name had to be already called. */
19268 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
19270 /* Strip the base name, keep any leading namespaces/classes. */
19271 base
= strrchr (DW_STRING (attr
), ':');
19272 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
19275 return (char *) obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
19277 &base
[-1] - DW_STRING (attr
));
19280 /* Return the name of the namespace/class that DIE is defined within,
19281 or "" if we can't tell. The caller should not xfree the result.
19283 For example, if we're within the method foo() in the following
19293 then determine_prefix on foo's die will return "N::C". */
19295 static const char *
19296 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
19298 struct die_info
*parent
, *spec_die
;
19299 struct dwarf2_cu
*spec_cu
;
19300 struct type
*parent_type
;
19303 if (cu
->language
!= language_cplus
19304 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
19305 && cu
->language
!= language_rust
)
19308 retval
= anonymous_struct_prefix (die
, cu
);
19312 /* We have to be careful in the presence of DW_AT_specification.
19313 For example, with GCC 3.4, given the code
19317 // Definition of N::foo.
19321 then we'll have a tree of DIEs like this:
19323 1: DW_TAG_compile_unit
19324 2: DW_TAG_namespace // N
19325 3: DW_TAG_subprogram // declaration of N::foo
19326 4: DW_TAG_subprogram // definition of N::foo
19327 DW_AT_specification // refers to die #3
19329 Thus, when processing die #4, we have to pretend that we're in
19330 the context of its DW_AT_specification, namely the contex of die
19333 spec_die
= die_specification (die
, &spec_cu
);
19334 if (spec_die
== NULL
)
19335 parent
= die
->parent
;
19338 parent
= spec_die
->parent
;
19342 if (parent
== NULL
)
19344 else if (parent
->building_fullname
)
19347 const char *parent_name
;
19349 /* It has been seen on RealView 2.2 built binaries,
19350 DW_TAG_template_type_param types actually _defined_ as
19351 children of the parent class:
19354 template class <class Enum> Class{};
19355 Class<enum E> class_e;
19357 1: DW_TAG_class_type (Class)
19358 2: DW_TAG_enumeration_type (E)
19359 3: DW_TAG_enumerator (enum1:0)
19360 3: DW_TAG_enumerator (enum2:1)
19362 2: DW_TAG_template_type_param
19363 DW_AT_type DW_FORM_ref_udata (E)
19365 Besides being broken debug info, it can put GDB into an
19366 infinite loop. Consider:
19368 When we're building the full name for Class<E>, we'll start
19369 at Class, and go look over its template type parameters,
19370 finding E. We'll then try to build the full name of E, and
19371 reach here. We're now trying to build the full name of E,
19372 and look over the parent DIE for containing scope. In the
19373 broken case, if we followed the parent DIE of E, we'd again
19374 find Class, and once again go look at its template type
19375 arguments, etc., etc. Simply don't consider such parent die
19376 as source-level parent of this die (it can't be, the language
19377 doesn't allow it), and break the loop here. */
19378 name
= dwarf2_name (die
, cu
);
19379 parent_name
= dwarf2_name (parent
, cu
);
19380 complaint (&symfile_complaints
,
19381 _("template param type '%s' defined within parent '%s'"),
19382 name
? name
: "<unknown>",
19383 parent_name
? parent_name
: "<unknown>");
19387 switch (parent
->tag
)
19389 case DW_TAG_namespace
:
19390 parent_type
= read_type_die (parent
, cu
);
19391 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
19392 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
19393 Work around this problem here. */
19394 if (cu
->language
== language_cplus
19395 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
19397 /* We give a name to even anonymous namespaces. */
19398 return TYPE_TAG_NAME (parent_type
);
19399 case DW_TAG_class_type
:
19400 case DW_TAG_interface_type
:
19401 case DW_TAG_structure_type
:
19402 case DW_TAG_union_type
:
19403 case DW_TAG_module
:
19404 parent_type
= read_type_die (parent
, cu
);
19405 if (TYPE_TAG_NAME (parent_type
) != NULL
)
19406 return TYPE_TAG_NAME (parent_type
);
19408 /* An anonymous structure is only allowed non-static data
19409 members; no typedefs, no member functions, et cetera.
19410 So it does not need a prefix. */
19412 case DW_TAG_compile_unit
:
19413 case DW_TAG_partial_unit
:
19414 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
19415 if (cu
->language
== language_cplus
19416 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
19417 && die
->child
!= NULL
19418 && (die
->tag
== DW_TAG_class_type
19419 || die
->tag
== DW_TAG_structure_type
19420 || die
->tag
== DW_TAG_union_type
))
19422 char *name
= guess_full_die_structure_name (die
, cu
);
19427 case DW_TAG_enumeration_type
:
19428 parent_type
= read_type_die (parent
, cu
);
19429 if (TYPE_DECLARED_CLASS (parent_type
))
19431 if (TYPE_TAG_NAME (parent_type
) != NULL
)
19432 return TYPE_TAG_NAME (parent_type
);
19435 /* Fall through. */
19437 return determine_prefix (parent
, cu
);
19441 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
19442 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
19443 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
19444 an obconcat, otherwise allocate storage for the result. The CU argument is
19445 used to determine the language and hence, the appropriate separator. */
19447 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
19450 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
19451 int physname
, struct dwarf2_cu
*cu
)
19453 const char *lead
= "";
19456 if (suffix
== NULL
|| suffix
[0] == '\0'
19457 || prefix
== NULL
|| prefix
[0] == '\0')
19459 else if (cu
->language
== language_d
)
19461 /* For D, the 'main' function could be defined in any module, but it
19462 should never be prefixed. */
19463 if (strcmp (suffix
, "D main") == 0)
19471 else if (cu
->language
== language_fortran
&& physname
)
19473 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
19474 DW_AT_MIPS_linkage_name is preferred and used instead. */
19482 if (prefix
== NULL
)
19484 if (suffix
== NULL
)
19491 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
19493 strcpy (retval
, lead
);
19494 strcat (retval
, prefix
);
19495 strcat (retval
, sep
);
19496 strcat (retval
, suffix
);
19501 /* We have an obstack. */
19502 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
19506 /* Return sibling of die, NULL if no sibling. */
19508 static struct die_info
*
19509 sibling_die (struct die_info
*die
)
19511 return die
->sibling
;
19514 /* Get name of a die, return NULL if not found. */
19516 static const char *
19517 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
19518 struct obstack
*obstack
)
19520 if (name
&& cu
->language
== language_cplus
)
19522 std::string canon_name
= cp_canonicalize_string (name
);
19524 if (!canon_name
.empty ())
19526 if (canon_name
!= name
)
19527 name
= (const char *) obstack_copy0 (obstack
,
19528 canon_name
.c_str (),
19529 canon_name
.length ());
19536 /* Get name of a die, return NULL if not found.
19537 Anonymous namespaces are converted to their magic string. */
19539 static const char *
19540 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19542 struct attribute
*attr
;
19544 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
19545 if ((!attr
|| !DW_STRING (attr
))
19546 && die
->tag
!= DW_TAG_namespace
19547 && die
->tag
!= DW_TAG_class_type
19548 && die
->tag
!= DW_TAG_interface_type
19549 && die
->tag
!= DW_TAG_structure_type
19550 && die
->tag
!= DW_TAG_union_type
)
19555 case DW_TAG_compile_unit
:
19556 case DW_TAG_partial_unit
:
19557 /* Compilation units have a DW_AT_name that is a filename, not
19558 a source language identifier. */
19559 case DW_TAG_enumeration_type
:
19560 case DW_TAG_enumerator
:
19561 /* These tags always have simple identifiers already; no need
19562 to canonicalize them. */
19563 return DW_STRING (attr
);
19565 case DW_TAG_namespace
:
19566 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
19567 return DW_STRING (attr
);
19568 return CP_ANONYMOUS_NAMESPACE_STR
;
19570 case DW_TAG_class_type
:
19571 case DW_TAG_interface_type
:
19572 case DW_TAG_structure_type
:
19573 case DW_TAG_union_type
:
19574 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
19575 structures or unions. These were of the form "._%d" in GCC 4.1,
19576 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
19577 and GCC 4.4. We work around this problem by ignoring these. */
19578 if (attr
&& DW_STRING (attr
)
19579 && (startswith (DW_STRING (attr
), "._")
19580 || startswith (DW_STRING (attr
), "<anonymous")))
19583 /* GCC might emit a nameless typedef that has a linkage name. See
19584 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
19585 if (!attr
|| DW_STRING (attr
) == NULL
)
19587 char *demangled
= NULL
;
19589 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
19591 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
19593 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
19596 /* Avoid demangling DW_STRING (attr) the second time on a second
19597 call for the same DIE. */
19598 if (!DW_STRING_IS_CANONICAL (attr
))
19599 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
19605 /* FIXME: we already did this for the partial symbol... */
19608 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
19609 demangled
, strlen (demangled
)));
19610 DW_STRING_IS_CANONICAL (attr
) = 1;
19613 /* Strip any leading namespaces/classes, keep only the base name.
19614 DW_AT_name for named DIEs does not contain the prefixes. */
19615 base
= strrchr (DW_STRING (attr
), ':');
19616 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
19619 return DW_STRING (attr
);
19628 if (!DW_STRING_IS_CANONICAL (attr
))
19631 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
19632 &cu
->objfile
->per_bfd
->storage_obstack
);
19633 DW_STRING_IS_CANONICAL (attr
) = 1;
19635 return DW_STRING (attr
);
19638 /* Return the die that this die in an extension of, or NULL if there
19639 is none. *EXT_CU is the CU containing DIE on input, and the CU
19640 containing the return value on output. */
19642 static struct die_info
*
19643 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
19645 struct attribute
*attr
;
19647 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
19651 return follow_die_ref (die
, attr
, ext_cu
);
19654 /* Convert a DIE tag into its string name. */
19656 static const char *
19657 dwarf_tag_name (unsigned tag
)
19659 const char *name
= get_DW_TAG_name (tag
);
19662 return "DW_TAG_<unknown>";
19667 /* Convert a DWARF attribute code into its string name. */
19669 static const char *
19670 dwarf_attr_name (unsigned attr
)
19674 #ifdef MIPS /* collides with DW_AT_HP_block_index */
19675 if (attr
== DW_AT_MIPS_fde
)
19676 return "DW_AT_MIPS_fde";
19678 if (attr
== DW_AT_HP_block_index
)
19679 return "DW_AT_HP_block_index";
19682 name
= get_DW_AT_name (attr
);
19685 return "DW_AT_<unknown>";
19690 /* Convert a DWARF value form code into its string name. */
19692 static const char *
19693 dwarf_form_name (unsigned form
)
19695 const char *name
= get_DW_FORM_name (form
);
19698 return "DW_FORM_<unknown>";
19704 dwarf_bool_name (unsigned mybool
)
19712 /* Convert a DWARF type code into its string name. */
19714 static const char *
19715 dwarf_type_encoding_name (unsigned enc
)
19717 const char *name
= get_DW_ATE_name (enc
);
19720 return "DW_ATE_<unknown>";
19726 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
19730 print_spaces (indent
, f
);
19731 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
19732 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
.sect_off
);
19734 if (die
->parent
!= NULL
)
19736 print_spaces (indent
, f
);
19737 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
19738 die
->parent
->offset
.sect_off
);
19741 print_spaces (indent
, f
);
19742 fprintf_unfiltered (f
, " has children: %s\n",
19743 dwarf_bool_name (die
->child
!= NULL
));
19745 print_spaces (indent
, f
);
19746 fprintf_unfiltered (f
, " attributes:\n");
19748 for (i
= 0; i
< die
->num_attrs
; ++i
)
19750 print_spaces (indent
, f
);
19751 fprintf_unfiltered (f
, " %s (%s) ",
19752 dwarf_attr_name (die
->attrs
[i
].name
),
19753 dwarf_form_name (die
->attrs
[i
].form
));
19755 switch (die
->attrs
[i
].form
)
19758 case DW_FORM_GNU_addr_index
:
19759 fprintf_unfiltered (f
, "address: ");
19760 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
19762 case DW_FORM_block2
:
19763 case DW_FORM_block4
:
19764 case DW_FORM_block
:
19765 case DW_FORM_block1
:
19766 fprintf_unfiltered (f
, "block: size %s",
19767 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
19769 case DW_FORM_exprloc
:
19770 fprintf_unfiltered (f
, "expression: size %s",
19771 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
19773 case DW_FORM_ref_addr
:
19774 fprintf_unfiltered (f
, "ref address: ");
19775 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
19777 case DW_FORM_GNU_ref_alt
:
19778 fprintf_unfiltered (f
, "alt ref address: ");
19779 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
19785 case DW_FORM_ref_udata
:
19786 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
19787 (long) (DW_UNSND (&die
->attrs
[i
])));
19789 case DW_FORM_data1
:
19790 case DW_FORM_data2
:
19791 case DW_FORM_data4
:
19792 case DW_FORM_data8
:
19793 case DW_FORM_udata
:
19794 case DW_FORM_sdata
:
19795 fprintf_unfiltered (f
, "constant: %s",
19796 pulongest (DW_UNSND (&die
->attrs
[i
])));
19798 case DW_FORM_sec_offset
:
19799 fprintf_unfiltered (f
, "section offset: %s",
19800 pulongest (DW_UNSND (&die
->attrs
[i
])));
19802 case DW_FORM_ref_sig8
:
19803 fprintf_unfiltered (f
, "signature: %s",
19804 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
19806 case DW_FORM_string
:
19808 case DW_FORM_GNU_str_index
:
19809 case DW_FORM_GNU_strp_alt
:
19810 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
19811 DW_STRING (&die
->attrs
[i
])
19812 ? DW_STRING (&die
->attrs
[i
]) : "",
19813 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
19816 if (DW_UNSND (&die
->attrs
[i
]))
19817 fprintf_unfiltered (f
, "flag: TRUE");
19819 fprintf_unfiltered (f
, "flag: FALSE");
19821 case DW_FORM_flag_present
:
19822 fprintf_unfiltered (f
, "flag: TRUE");
19824 case DW_FORM_indirect
:
19825 /* The reader will have reduced the indirect form to
19826 the "base form" so this form should not occur. */
19827 fprintf_unfiltered (f
,
19828 "unexpected attribute form: DW_FORM_indirect");
19831 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
19832 die
->attrs
[i
].form
);
19835 fprintf_unfiltered (f
, "\n");
19840 dump_die_for_error (struct die_info
*die
)
19842 dump_die_shallow (gdb_stderr
, 0, die
);
19846 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
19848 int indent
= level
* 4;
19850 gdb_assert (die
!= NULL
);
19852 if (level
>= max_level
)
19855 dump_die_shallow (f
, indent
, die
);
19857 if (die
->child
!= NULL
)
19859 print_spaces (indent
, f
);
19860 fprintf_unfiltered (f
, " Children:");
19861 if (level
+ 1 < max_level
)
19863 fprintf_unfiltered (f
, "\n");
19864 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
19868 fprintf_unfiltered (f
,
19869 " [not printed, max nesting level reached]\n");
19873 if (die
->sibling
!= NULL
&& level
> 0)
19875 dump_die_1 (f
, level
, max_level
, die
->sibling
);
19879 /* This is called from the pdie macro in gdbinit.in.
19880 It's not static so gcc will keep a copy callable from gdb. */
19883 dump_die (struct die_info
*die
, int max_level
)
19885 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
19889 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
19893 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
.sect_off
,
19899 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
19903 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
19905 sect_offset retval
= { DW_UNSND (attr
) };
19907 if (attr_form_is_ref (attr
))
19910 retval
.sect_off
= 0;
19911 complaint (&symfile_complaints
,
19912 _("unsupported die ref attribute form: '%s'"),
19913 dwarf_form_name (attr
->form
));
19917 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
19918 * the value held by the attribute is not constant. */
19921 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
19923 if (attr
->form
== DW_FORM_sdata
)
19924 return DW_SND (attr
);
19925 else if (attr
->form
== DW_FORM_udata
19926 || attr
->form
== DW_FORM_data1
19927 || attr
->form
== DW_FORM_data2
19928 || attr
->form
== DW_FORM_data4
19929 || attr
->form
== DW_FORM_data8
)
19930 return DW_UNSND (attr
);
19933 complaint (&symfile_complaints
,
19934 _("Attribute value is not a constant (%s)"),
19935 dwarf_form_name (attr
->form
));
19936 return default_value
;
19940 /* Follow reference or signature attribute ATTR of SRC_DIE.
19941 On entry *REF_CU is the CU of SRC_DIE.
19942 On exit *REF_CU is the CU of the result. */
19944 static struct die_info
*
19945 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
19946 struct dwarf2_cu
**ref_cu
)
19948 struct die_info
*die
;
19950 if (attr_form_is_ref (attr
))
19951 die
= follow_die_ref (src_die
, attr
, ref_cu
);
19952 else if (attr
->form
== DW_FORM_ref_sig8
)
19953 die
= follow_die_sig (src_die
, attr
, ref_cu
);
19956 dump_die_for_error (src_die
);
19957 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
19958 objfile_name ((*ref_cu
)->objfile
));
19964 /* Follow reference OFFSET.
19965 On entry *REF_CU is the CU of the source die referencing OFFSET.
19966 On exit *REF_CU is the CU of the result.
19967 Returns NULL if OFFSET is invalid. */
19969 static struct die_info
*
19970 follow_die_offset (sect_offset offset
, int offset_in_dwz
,
19971 struct dwarf2_cu
**ref_cu
)
19973 struct die_info temp_die
;
19974 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
19976 gdb_assert (cu
->per_cu
!= NULL
);
19980 if (cu
->per_cu
->is_debug_types
)
19982 /* .debug_types CUs cannot reference anything outside their CU.
19983 If they need to, they have to reference a signatured type via
19984 DW_FORM_ref_sig8. */
19985 if (! offset_in_cu_p (&cu
->header
, offset
))
19988 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
19989 || ! offset_in_cu_p (&cu
->header
, offset
))
19991 struct dwarf2_per_cu_data
*per_cu
;
19993 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
19996 /* If necessary, add it to the queue and load its DIEs. */
19997 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
19998 load_full_comp_unit (per_cu
, cu
->language
);
20000 target_cu
= per_cu
->cu
;
20002 else if (cu
->dies
== NULL
)
20004 /* We're loading full DIEs during partial symbol reading. */
20005 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
20006 load_full_comp_unit (cu
->per_cu
, language_minimal
);
20009 *ref_cu
= target_cu
;
20010 temp_die
.offset
= offset
;
20011 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
20012 &temp_die
, offset
.sect_off
);
20015 /* Follow reference attribute ATTR of SRC_DIE.
20016 On entry *REF_CU is the CU of SRC_DIE.
20017 On exit *REF_CU is the CU of the result. */
20019 static struct die_info
*
20020 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
20021 struct dwarf2_cu
**ref_cu
)
20023 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
20024 struct dwarf2_cu
*cu
= *ref_cu
;
20025 struct die_info
*die
;
20027 die
= follow_die_offset (offset
,
20028 (attr
->form
== DW_FORM_GNU_ref_alt
20029 || cu
->per_cu
->is_dwz
),
20032 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
20033 "at 0x%x [in module %s]"),
20034 offset
.sect_off
, src_die
->offset
.sect_off
,
20035 objfile_name (cu
->objfile
));
20040 /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU.
20041 Returned value is intended for DW_OP_call*. Returned
20042 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
20044 struct dwarf2_locexpr_baton
20045 dwarf2_fetch_die_loc_sect_off (sect_offset offset
,
20046 struct dwarf2_per_cu_data
*per_cu
,
20047 CORE_ADDR (*get_frame_pc
) (void *baton
),
20050 struct dwarf2_cu
*cu
;
20051 struct die_info
*die
;
20052 struct attribute
*attr
;
20053 struct dwarf2_locexpr_baton retval
;
20055 dw2_setup (per_cu
->objfile
);
20057 if (per_cu
->cu
== NULL
)
20062 /* We shouldn't get here for a dummy CU, but don't crash on the user.
20063 Instead just throw an error, not much else we can do. */
20064 error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"),
20065 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20068 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
20070 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
20071 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20073 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
20076 /* DWARF: "If there is no such attribute, then there is no effect.".
20077 DATA is ignored if SIZE is 0. */
20079 retval
.data
= NULL
;
20082 else if (attr_form_is_section_offset (attr
))
20084 struct dwarf2_loclist_baton loclist_baton
;
20085 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
20088 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
20090 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
20092 retval
.size
= size
;
20096 if (!attr_form_is_block (attr
))
20097 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
20098 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
20099 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20101 retval
.data
= DW_BLOCK (attr
)->data
;
20102 retval
.size
= DW_BLOCK (attr
)->size
;
20104 retval
.per_cu
= cu
->per_cu
;
20106 age_cached_comp_units ();
20111 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
20114 struct dwarf2_locexpr_baton
20115 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
20116 struct dwarf2_per_cu_data
*per_cu
,
20117 CORE_ADDR (*get_frame_pc
) (void *baton
),
20120 sect_offset offset
= { per_cu
->offset
.sect_off
+ offset_in_cu
.cu_off
};
20122 return dwarf2_fetch_die_loc_sect_off (offset
, per_cu
, get_frame_pc
, baton
);
20125 /* Write a constant of a given type as target-ordered bytes into
20128 static const gdb_byte
*
20129 write_constant_as_bytes (struct obstack
*obstack
,
20130 enum bfd_endian byte_order
,
20137 *len
= TYPE_LENGTH (type
);
20138 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
20139 store_unsigned_integer (result
, *len
, byte_order
, value
);
20144 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
20145 pointer to the constant bytes and set LEN to the length of the
20146 data. If memory is needed, allocate it on OBSTACK. If the DIE
20147 does not have a DW_AT_const_value, return NULL. */
20150 dwarf2_fetch_constant_bytes (sect_offset offset
,
20151 struct dwarf2_per_cu_data
*per_cu
,
20152 struct obstack
*obstack
,
20155 struct dwarf2_cu
*cu
;
20156 struct die_info
*die
;
20157 struct attribute
*attr
;
20158 const gdb_byte
*result
= NULL
;
20161 enum bfd_endian byte_order
;
20163 dw2_setup (per_cu
->objfile
);
20165 if (per_cu
->cu
== NULL
)
20170 /* We shouldn't get here for a dummy CU, but don't crash on the user.
20171 Instead just throw an error, not much else we can do. */
20172 error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"),
20173 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20176 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
20178 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
20179 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20182 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20186 byte_order
= (bfd_big_endian (per_cu
->objfile
->obfd
)
20187 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
20189 switch (attr
->form
)
20192 case DW_FORM_GNU_addr_index
:
20196 *len
= cu
->header
.addr_size
;
20197 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
20198 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
20202 case DW_FORM_string
:
20204 case DW_FORM_GNU_str_index
:
20205 case DW_FORM_GNU_strp_alt
:
20206 /* DW_STRING is already allocated on the objfile obstack, point
20208 result
= (const gdb_byte
*) DW_STRING (attr
);
20209 *len
= strlen (DW_STRING (attr
));
20211 case DW_FORM_block1
:
20212 case DW_FORM_block2
:
20213 case DW_FORM_block4
:
20214 case DW_FORM_block
:
20215 case DW_FORM_exprloc
:
20216 result
= DW_BLOCK (attr
)->data
;
20217 *len
= DW_BLOCK (attr
)->size
;
20220 /* The DW_AT_const_value attributes are supposed to carry the
20221 symbol's value "represented as it would be on the target
20222 architecture." By the time we get here, it's already been
20223 converted to host endianness, so we just need to sign- or
20224 zero-extend it as appropriate. */
20225 case DW_FORM_data1
:
20226 type
= die_type (die
, cu
);
20227 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
20228 if (result
== NULL
)
20229 result
= write_constant_as_bytes (obstack
, byte_order
,
20232 case DW_FORM_data2
:
20233 type
= die_type (die
, cu
);
20234 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
20235 if (result
== NULL
)
20236 result
= write_constant_as_bytes (obstack
, byte_order
,
20239 case DW_FORM_data4
:
20240 type
= die_type (die
, cu
);
20241 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
20242 if (result
== NULL
)
20243 result
= write_constant_as_bytes (obstack
, byte_order
,
20246 case DW_FORM_data8
:
20247 type
= die_type (die
, cu
);
20248 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
20249 if (result
== NULL
)
20250 result
= write_constant_as_bytes (obstack
, byte_order
,
20254 case DW_FORM_sdata
:
20255 type
= die_type (die
, cu
);
20256 result
= write_constant_as_bytes (obstack
, byte_order
,
20257 type
, DW_SND (attr
), len
);
20260 case DW_FORM_udata
:
20261 type
= die_type (die
, cu
);
20262 result
= write_constant_as_bytes (obstack
, byte_order
,
20263 type
, DW_UNSND (attr
), len
);
20267 complaint (&symfile_complaints
,
20268 _("unsupported const value attribute form: '%s'"),
20269 dwarf_form_name (attr
->form
));
20276 /* Return the type of the DIE at DIE_OFFSET in the CU named by
20280 dwarf2_get_die_type (cu_offset die_offset
,
20281 struct dwarf2_per_cu_data
*per_cu
)
20283 sect_offset die_offset_sect
;
20285 dw2_setup (per_cu
->objfile
);
20287 die_offset_sect
.sect_off
= per_cu
->offset
.sect_off
+ die_offset
.cu_off
;
20288 return get_die_type_at_offset (die_offset_sect
, per_cu
);
20291 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
20292 On entry *REF_CU is the CU of SRC_DIE.
20293 On exit *REF_CU is the CU of the result.
20294 Returns NULL if the referenced DIE isn't found. */
20296 static struct die_info
*
20297 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
20298 struct dwarf2_cu
**ref_cu
)
20300 struct die_info temp_die
;
20301 struct dwarf2_cu
*sig_cu
;
20302 struct die_info
*die
;
20304 /* While it might be nice to assert sig_type->type == NULL here,
20305 we can get here for DW_AT_imported_declaration where we need
20306 the DIE not the type. */
20308 /* If necessary, add it to the queue and load its DIEs. */
20310 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
20311 read_signatured_type (sig_type
);
20313 sig_cu
= sig_type
->per_cu
.cu
;
20314 gdb_assert (sig_cu
!= NULL
);
20315 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
20316 temp_die
.offset
= sig_type
->type_offset_in_section
;
20317 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
20318 temp_die
.offset
.sect_off
);
20321 /* For .gdb_index version 7 keep track of included TUs.
20322 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
20323 if (dwarf2_per_objfile
->index_table
!= NULL
20324 && dwarf2_per_objfile
->index_table
->version
<= 7)
20326 VEC_safe_push (dwarf2_per_cu_ptr
,
20327 (*ref_cu
)->per_cu
->imported_symtabs
,
20338 /* Follow signatured type referenced by ATTR in SRC_DIE.
20339 On entry *REF_CU is the CU of SRC_DIE.
20340 On exit *REF_CU is the CU of the result.
20341 The result is the DIE of the type.
20342 If the referenced type cannot be found an error is thrown. */
20344 static struct die_info
*
20345 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
20346 struct dwarf2_cu
**ref_cu
)
20348 ULONGEST signature
= DW_SIGNATURE (attr
);
20349 struct signatured_type
*sig_type
;
20350 struct die_info
*die
;
20352 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
20354 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
20355 /* sig_type will be NULL if the signatured type is missing from
20357 if (sig_type
== NULL
)
20359 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
20360 " from DIE at 0x%x [in module %s]"),
20361 hex_string (signature
), src_die
->offset
.sect_off
,
20362 objfile_name ((*ref_cu
)->objfile
));
20365 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
20368 dump_die_for_error (src_die
);
20369 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
20370 " from DIE at 0x%x [in module %s]"),
20371 hex_string (signature
), src_die
->offset
.sect_off
,
20372 objfile_name ((*ref_cu
)->objfile
));
20378 /* Get the type specified by SIGNATURE referenced in DIE/CU,
20379 reading in and processing the type unit if necessary. */
20381 static struct type
*
20382 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
20383 struct dwarf2_cu
*cu
)
20385 struct signatured_type
*sig_type
;
20386 struct dwarf2_cu
*type_cu
;
20387 struct die_info
*type_die
;
20390 sig_type
= lookup_signatured_type (cu
, signature
);
20391 /* sig_type will be NULL if the signatured type is missing from
20393 if (sig_type
== NULL
)
20395 complaint (&symfile_complaints
,
20396 _("Dwarf Error: Cannot find signatured DIE %s referenced"
20397 " from DIE at 0x%x [in module %s]"),
20398 hex_string (signature
), die
->offset
.sect_off
,
20399 objfile_name (dwarf2_per_objfile
->objfile
));
20400 return build_error_marker_type (cu
, die
);
20403 /* If we already know the type we're done. */
20404 if (sig_type
->type
!= NULL
)
20405 return sig_type
->type
;
20408 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
20409 if (type_die
!= NULL
)
20411 /* N.B. We need to call get_die_type to ensure only one type for this DIE
20412 is created. This is important, for example, because for c++ classes
20413 we need TYPE_NAME set which is only done by new_symbol. Blech. */
20414 type
= read_type_die (type_die
, type_cu
);
20417 complaint (&symfile_complaints
,
20418 _("Dwarf Error: Cannot build signatured type %s"
20419 " referenced from DIE at 0x%x [in module %s]"),
20420 hex_string (signature
), die
->offset
.sect_off
,
20421 objfile_name (dwarf2_per_objfile
->objfile
));
20422 type
= build_error_marker_type (cu
, die
);
20427 complaint (&symfile_complaints
,
20428 _("Dwarf Error: Problem reading signatured DIE %s referenced"
20429 " from DIE at 0x%x [in module %s]"),
20430 hex_string (signature
), die
->offset
.sect_off
,
20431 objfile_name (dwarf2_per_objfile
->objfile
));
20432 type
= build_error_marker_type (cu
, die
);
20434 sig_type
->type
= type
;
20439 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
20440 reading in and processing the type unit if necessary. */
20442 static struct type
*
20443 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
20444 struct dwarf2_cu
*cu
) /* ARI: editCase function */
20446 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
20447 if (attr_form_is_ref (attr
))
20449 struct dwarf2_cu
*type_cu
= cu
;
20450 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
20452 return read_type_die (type_die
, type_cu
);
20454 else if (attr
->form
== DW_FORM_ref_sig8
)
20456 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
20460 complaint (&symfile_complaints
,
20461 _("Dwarf Error: DW_AT_signature has bad form %s in DIE"
20462 " at 0x%x [in module %s]"),
20463 dwarf_form_name (attr
->form
), die
->offset
.sect_off
,
20464 objfile_name (dwarf2_per_objfile
->objfile
));
20465 return build_error_marker_type (cu
, die
);
20469 /* Load the DIEs associated with type unit PER_CU into memory. */
20472 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
20474 struct signatured_type
*sig_type
;
20476 /* Caller is responsible for ensuring type_unit_groups don't get here. */
20477 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
20479 /* We have the per_cu, but we need the signatured_type.
20480 Fortunately this is an easy translation. */
20481 gdb_assert (per_cu
->is_debug_types
);
20482 sig_type
= (struct signatured_type
*) per_cu
;
20484 gdb_assert (per_cu
->cu
== NULL
);
20486 read_signatured_type (sig_type
);
20488 gdb_assert (per_cu
->cu
!= NULL
);
20491 /* die_reader_func for read_signatured_type.
20492 This is identical to load_full_comp_unit_reader,
20493 but is kept separate for now. */
20496 read_signatured_type_reader (const struct die_reader_specs
*reader
,
20497 const gdb_byte
*info_ptr
,
20498 struct die_info
*comp_unit_die
,
20502 struct dwarf2_cu
*cu
= reader
->cu
;
20504 gdb_assert (cu
->die_hash
== NULL
);
20506 htab_create_alloc_ex (cu
->header
.length
/ 12,
20510 &cu
->comp_unit_obstack
,
20511 hashtab_obstack_allocate
,
20512 dummy_obstack_deallocate
);
20515 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
20516 &info_ptr
, comp_unit_die
);
20517 cu
->dies
= comp_unit_die
;
20518 /* comp_unit_die is not stored in die_hash, no need. */
20520 /* We try not to read any attributes in this function, because not
20521 all CUs needed for references have been loaded yet, and symbol
20522 table processing isn't initialized. But we have to set the CU language,
20523 or we won't be able to build types correctly.
20524 Similarly, if we do not read the producer, we can not apply
20525 producer-specific interpretation. */
20526 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
20529 /* Read in a signatured type and build its CU and DIEs.
20530 If the type is a stub for the real type in a DWO file,
20531 read in the real type from the DWO file as well. */
20534 read_signatured_type (struct signatured_type
*sig_type
)
20536 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
20538 gdb_assert (per_cu
->is_debug_types
);
20539 gdb_assert (per_cu
->cu
== NULL
);
20541 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
20542 read_signatured_type_reader
, NULL
);
20543 sig_type
->per_cu
.tu_read
= 1;
20546 /* Decode simple location descriptions.
20547 Given a pointer to a dwarf block that defines a location, compute
20548 the location and return the value.
20550 NOTE drow/2003-11-18: This function is called in two situations
20551 now: for the address of static or global variables (partial symbols
20552 only) and for offsets into structures which are expected to be
20553 (more or less) constant. The partial symbol case should go away,
20554 and only the constant case should remain. That will let this
20555 function complain more accurately. A few special modes are allowed
20556 without complaint for global variables (for instance, global
20557 register values and thread-local values).
20559 A location description containing no operations indicates that the
20560 object is optimized out. The return value is 0 for that case.
20561 FIXME drow/2003-11-16: No callers check for this case any more; soon all
20562 callers will only want a very basic result and this can become a
20565 Note that stack[0] is unused except as a default error return. */
20568 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
20570 struct objfile
*objfile
= cu
->objfile
;
20572 size_t size
= blk
->size
;
20573 const gdb_byte
*data
= blk
->data
;
20574 CORE_ADDR stack
[64];
20576 unsigned int bytes_read
, unsnd
;
20582 stack
[++stacki
] = 0;
20621 stack
[++stacki
] = op
- DW_OP_lit0
;
20656 stack
[++stacki
] = op
- DW_OP_reg0
;
20658 dwarf2_complex_location_expr_complaint ();
20662 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
20664 stack
[++stacki
] = unsnd
;
20666 dwarf2_complex_location_expr_complaint ();
20670 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
20675 case DW_OP_const1u
:
20676 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
20680 case DW_OP_const1s
:
20681 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
20685 case DW_OP_const2u
:
20686 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
20690 case DW_OP_const2s
:
20691 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
20695 case DW_OP_const4u
:
20696 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
20700 case DW_OP_const4s
:
20701 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
20705 case DW_OP_const8u
:
20706 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
20711 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
20717 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
20722 stack
[stacki
+ 1] = stack
[stacki
];
20727 stack
[stacki
- 1] += stack
[stacki
];
20731 case DW_OP_plus_uconst
:
20732 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
20738 stack
[stacki
- 1] -= stack
[stacki
];
20743 /* If we're not the last op, then we definitely can't encode
20744 this using GDB's address_class enum. This is valid for partial
20745 global symbols, although the variable's address will be bogus
20748 dwarf2_complex_location_expr_complaint ();
20751 case DW_OP_GNU_push_tls_address
:
20752 case DW_OP_form_tls_address
:
20753 /* The top of the stack has the offset from the beginning
20754 of the thread control block at which the variable is located. */
20755 /* Nothing should follow this operator, so the top of stack would
20757 /* This is valid for partial global symbols, but the variable's
20758 address will be bogus in the psymtab. Make it always at least
20759 non-zero to not look as a variable garbage collected by linker
20760 which have DW_OP_addr 0. */
20762 dwarf2_complex_location_expr_complaint ();
20766 case DW_OP_GNU_uninit
:
20769 case DW_OP_GNU_addr_index
:
20770 case DW_OP_GNU_const_index
:
20771 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
20778 const char *name
= get_DW_OP_name (op
);
20781 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
20784 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
20788 return (stack
[stacki
]);
20791 /* Enforce maximum stack depth of SIZE-1 to avoid writing
20792 outside of the allocated space. Also enforce minimum>0. */
20793 if (stacki
>= ARRAY_SIZE (stack
) - 1)
20795 complaint (&symfile_complaints
,
20796 _("location description stack overflow"));
20802 complaint (&symfile_complaints
,
20803 _("location description stack underflow"));
20807 return (stack
[stacki
]);
20810 /* memory allocation interface */
20812 static struct dwarf_block
*
20813 dwarf_alloc_block (struct dwarf2_cu
*cu
)
20815 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
20818 static struct die_info
*
20819 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
20821 struct die_info
*die
;
20822 size_t size
= sizeof (struct die_info
);
20825 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
20827 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
20828 memset (die
, 0, sizeof (struct die_info
));
20833 /* Macro support. */
20835 /* Return file name relative to the compilation directory of file number I in
20836 *LH's file name table. The result is allocated using xmalloc; the caller is
20837 responsible for freeing it. */
20840 file_file_name (int file
, struct line_header
*lh
)
20842 /* Is the file number a valid index into the line header's file name
20843 table? Remember that file numbers start with one, not zero. */
20844 if (1 <= file
&& file
<= lh
->num_file_names
)
20846 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
20848 if (IS_ABSOLUTE_PATH (fe
->name
) || fe
->dir_index
== 0
20849 || lh
->include_dirs
== NULL
)
20850 return xstrdup (fe
->name
);
20851 return concat (lh
->include_dirs
[fe
->dir_index
- 1], SLASH_STRING
,
20852 fe
->name
, (char *) NULL
);
20856 /* The compiler produced a bogus file number. We can at least
20857 record the macro definitions made in the file, even if we
20858 won't be able to find the file by name. */
20859 char fake_name
[80];
20861 xsnprintf (fake_name
, sizeof (fake_name
),
20862 "<bad macro file number %d>", file
);
20864 complaint (&symfile_complaints
,
20865 _("bad file number in macro information (%d)"),
20868 return xstrdup (fake_name
);
20872 /* Return the full name of file number I in *LH's file name table.
20873 Use COMP_DIR as the name of the current directory of the
20874 compilation. The result is allocated using xmalloc; the caller is
20875 responsible for freeing it. */
20877 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
20879 /* Is the file number a valid index into the line header's file name
20880 table? Remember that file numbers start with one, not zero. */
20881 if (1 <= file
&& file
<= lh
->num_file_names
)
20883 char *relative
= file_file_name (file
, lh
);
20885 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
20887 return reconcat (relative
, comp_dir
, SLASH_STRING
,
20888 relative
, (char *) NULL
);
20891 return file_file_name (file
, lh
);
20895 static struct macro_source_file
*
20896 macro_start_file (int file
, int line
,
20897 struct macro_source_file
*current_file
,
20898 struct line_header
*lh
)
20900 /* File name relative to the compilation directory of this source file. */
20901 char *file_name
= file_file_name (file
, lh
);
20903 if (! current_file
)
20905 /* Note: We don't create a macro table for this compilation unit
20906 at all until we actually get a filename. */
20907 struct macro_table
*macro_table
= get_macro_table ();
20909 /* If we have no current file, then this must be the start_file
20910 directive for the compilation unit's main source file. */
20911 current_file
= macro_set_main (macro_table
, file_name
);
20912 macro_define_special (macro_table
);
20915 current_file
= macro_include (current_file
, line
, file_name
);
20919 return current_file
;
20923 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
20924 followed by a null byte. */
20926 copy_string (const char *buf
, int len
)
20928 char *s
= (char *) xmalloc (len
+ 1);
20930 memcpy (s
, buf
, len
);
20936 static const char *
20937 consume_improper_spaces (const char *p
, const char *body
)
20941 complaint (&symfile_complaints
,
20942 _("macro definition contains spaces "
20943 "in formal argument list:\n`%s'"),
20955 parse_macro_definition (struct macro_source_file
*file
, int line
,
20960 /* The body string takes one of two forms. For object-like macro
20961 definitions, it should be:
20963 <macro name> " " <definition>
20965 For function-like macro definitions, it should be:
20967 <macro name> "() " <definition>
20969 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
20971 Spaces may appear only where explicitly indicated, and in the
20974 The Dwarf 2 spec says that an object-like macro's name is always
20975 followed by a space, but versions of GCC around March 2002 omit
20976 the space when the macro's definition is the empty string.
20978 The Dwarf 2 spec says that there should be no spaces between the
20979 formal arguments in a function-like macro's formal argument list,
20980 but versions of GCC around March 2002 include spaces after the
20984 /* Find the extent of the macro name. The macro name is terminated
20985 by either a space or null character (for an object-like macro) or
20986 an opening paren (for a function-like macro). */
20987 for (p
= body
; *p
; p
++)
20988 if (*p
== ' ' || *p
== '(')
20991 if (*p
== ' ' || *p
== '\0')
20993 /* It's an object-like macro. */
20994 int name_len
= p
- body
;
20995 char *name
= copy_string (body
, name_len
);
20996 const char *replacement
;
20999 replacement
= body
+ name_len
+ 1;
21002 dwarf2_macro_malformed_definition_complaint (body
);
21003 replacement
= body
+ name_len
;
21006 macro_define_object (file
, line
, name
, replacement
);
21010 else if (*p
== '(')
21012 /* It's a function-like macro. */
21013 char *name
= copy_string (body
, p
- body
);
21016 char **argv
= XNEWVEC (char *, argv_size
);
21020 p
= consume_improper_spaces (p
, body
);
21022 /* Parse the formal argument list. */
21023 while (*p
&& *p
!= ')')
21025 /* Find the extent of the current argument name. */
21026 const char *arg_start
= p
;
21028 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
21031 if (! *p
|| p
== arg_start
)
21032 dwarf2_macro_malformed_definition_complaint (body
);
21035 /* Make sure argv has room for the new argument. */
21036 if (argc
>= argv_size
)
21039 argv
= XRESIZEVEC (char *, argv
, argv_size
);
21042 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
21045 p
= consume_improper_spaces (p
, body
);
21047 /* Consume the comma, if present. */
21052 p
= consume_improper_spaces (p
, body
);
21061 /* Perfectly formed definition, no complaints. */
21062 macro_define_function (file
, line
, name
,
21063 argc
, (const char **) argv
,
21065 else if (*p
== '\0')
21067 /* Complain, but do define it. */
21068 dwarf2_macro_malformed_definition_complaint (body
);
21069 macro_define_function (file
, line
, name
,
21070 argc
, (const char **) argv
,
21074 /* Just complain. */
21075 dwarf2_macro_malformed_definition_complaint (body
);
21078 /* Just complain. */
21079 dwarf2_macro_malformed_definition_complaint (body
);
21085 for (i
= 0; i
< argc
; i
++)
21091 dwarf2_macro_malformed_definition_complaint (body
);
21094 /* Skip some bytes from BYTES according to the form given in FORM.
21095 Returns the new pointer. */
21097 static const gdb_byte
*
21098 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
21099 enum dwarf_form form
,
21100 unsigned int offset_size
,
21101 struct dwarf2_section_info
*section
)
21103 unsigned int bytes_read
;
21107 case DW_FORM_data1
:
21112 case DW_FORM_data2
:
21116 case DW_FORM_data4
:
21120 case DW_FORM_data8
:
21124 case DW_FORM_string
:
21125 read_direct_string (abfd
, bytes
, &bytes_read
);
21126 bytes
+= bytes_read
;
21129 case DW_FORM_sec_offset
:
21131 case DW_FORM_GNU_strp_alt
:
21132 bytes
+= offset_size
;
21135 case DW_FORM_block
:
21136 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
21137 bytes
+= bytes_read
;
21140 case DW_FORM_block1
:
21141 bytes
+= 1 + read_1_byte (abfd
, bytes
);
21143 case DW_FORM_block2
:
21144 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
21146 case DW_FORM_block4
:
21147 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
21150 case DW_FORM_sdata
:
21151 case DW_FORM_udata
:
21152 case DW_FORM_GNU_addr_index
:
21153 case DW_FORM_GNU_str_index
:
21154 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
21157 dwarf2_section_buffer_overflow_complaint (section
);
21165 complaint (&symfile_complaints
,
21166 _("invalid form 0x%x in `%s'"),
21167 form
, get_section_name (section
));
21175 /* A helper for dwarf_decode_macros that handles skipping an unknown
21176 opcode. Returns an updated pointer to the macro data buffer; or,
21177 on error, issues a complaint and returns NULL. */
21179 static const gdb_byte
*
21180 skip_unknown_opcode (unsigned int opcode
,
21181 const gdb_byte
**opcode_definitions
,
21182 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
21184 unsigned int offset_size
,
21185 struct dwarf2_section_info
*section
)
21187 unsigned int bytes_read
, i
;
21189 const gdb_byte
*defn
;
21191 if (opcode_definitions
[opcode
] == NULL
)
21193 complaint (&symfile_complaints
,
21194 _("unrecognized DW_MACFINO opcode 0x%x"),
21199 defn
= opcode_definitions
[opcode
];
21200 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
21201 defn
+= bytes_read
;
21203 for (i
= 0; i
< arg
; ++i
)
21205 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
,
21206 (enum dwarf_form
) defn
[i
], offset_size
,
21208 if (mac_ptr
== NULL
)
21210 /* skip_form_bytes already issued the complaint. */
21218 /* A helper function which parses the header of a macro section.
21219 If the macro section is the extended (for now called "GNU") type,
21220 then this updates *OFFSET_SIZE. Returns a pointer to just after
21221 the header, or issues a complaint and returns NULL on error. */
21223 static const gdb_byte
*
21224 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
21226 const gdb_byte
*mac_ptr
,
21227 unsigned int *offset_size
,
21228 int section_is_gnu
)
21230 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
21232 if (section_is_gnu
)
21234 unsigned int version
, flags
;
21236 version
= read_2_bytes (abfd
, mac_ptr
);
21239 complaint (&symfile_complaints
,
21240 _("unrecognized version `%d' in .debug_macro section"),
21246 flags
= read_1_byte (abfd
, mac_ptr
);
21248 *offset_size
= (flags
& 1) ? 8 : 4;
21250 if ((flags
& 2) != 0)
21251 /* We don't need the line table offset. */
21252 mac_ptr
+= *offset_size
;
21254 /* Vendor opcode descriptions. */
21255 if ((flags
& 4) != 0)
21257 unsigned int i
, count
;
21259 count
= read_1_byte (abfd
, mac_ptr
);
21261 for (i
= 0; i
< count
; ++i
)
21263 unsigned int opcode
, bytes_read
;
21266 opcode
= read_1_byte (abfd
, mac_ptr
);
21268 opcode_definitions
[opcode
] = mac_ptr
;
21269 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21270 mac_ptr
+= bytes_read
;
21279 /* A helper for dwarf_decode_macros that handles the GNU extensions,
21280 including DW_MACRO_GNU_transparent_include. */
21283 dwarf_decode_macro_bytes (bfd
*abfd
,
21284 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
21285 struct macro_source_file
*current_file
,
21286 struct line_header
*lh
,
21287 struct dwarf2_section_info
*section
,
21288 int section_is_gnu
, int section_is_dwz
,
21289 unsigned int offset_size
,
21290 htab_t include_hash
)
21292 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21293 enum dwarf_macro_record_type macinfo_type
;
21294 int at_commandline
;
21295 const gdb_byte
*opcode_definitions
[256];
21297 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
21298 &offset_size
, section_is_gnu
);
21299 if (mac_ptr
== NULL
)
21301 /* We already issued a complaint. */
21305 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
21306 GDB is still reading the definitions from command line. First
21307 DW_MACINFO_start_file will need to be ignored as it was already executed
21308 to create CURRENT_FILE for the main source holding also the command line
21309 definitions. On first met DW_MACINFO_start_file this flag is reset to
21310 normally execute all the remaining DW_MACINFO_start_file macinfos. */
21312 at_commandline
= 1;
21316 /* Do we at least have room for a macinfo type byte? */
21317 if (mac_ptr
>= mac_end
)
21319 dwarf2_section_buffer_overflow_complaint (section
);
21323 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
21326 /* Note that we rely on the fact that the corresponding GNU and
21327 DWARF constants are the same. */
21328 switch (macinfo_type
)
21330 /* A zero macinfo type indicates the end of the macro
21335 case DW_MACRO_GNU_define
:
21336 case DW_MACRO_GNU_undef
:
21337 case DW_MACRO_GNU_define_indirect
:
21338 case DW_MACRO_GNU_undef_indirect
:
21339 case DW_MACRO_GNU_define_indirect_alt
:
21340 case DW_MACRO_GNU_undef_indirect_alt
:
21342 unsigned int bytes_read
;
21347 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21348 mac_ptr
+= bytes_read
;
21350 if (macinfo_type
== DW_MACRO_GNU_define
21351 || macinfo_type
== DW_MACRO_GNU_undef
)
21353 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21354 mac_ptr
+= bytes_read
;
21358 LONGEST str_offset
;
21360 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
21361 mac_ptr
+= offset_size
;
21363 if (macinfo_type
== DW_MACRO_GNU_define_indirect_alt
21364 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
21367 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
21369 body
= read_indirect_string_from_dwz (dwz
, str_offset
);
21372 body
= read_indirect_string_at_offset (abfd
, str_offset
);
21375 is_define
= (macinfo_type
== DW_MACRO_GNU_define
21376 || macinfo_type
== DW_MACRO_GNU_define_indirect
21377 || macinfo_type
== DW_MACRO_GNU_define_indirect_alt
);
21378 if (! current_file
)
21380 /* DWARF violation as no main source is present. */
21381 complaint (&symfile_complaints
,
21382 _("debug info with no main source gives macro %s "
21384 is_define
? _("definition") : _("undefinition"),
21388 if ((line
== 0 && !at_commandline
)
21389 || (line
!= 0 && at_commandline
))
21390 complaint (&symfile_complaints
,
21391 _("debug info gives %s macro %s with %s line %d: %s"),
21392 at_commandline
? _("command-line") : _("in-file"),
21393 is_define
? _("definition") : _("undefinition"),
21394 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
21397 parse_macro_definition (current_file
, line
, body
);
21400 gdb_assert (macinfo_type
== DW_MACRO_GNU_undef
21401 || macinfo_type
== DW_MACRO_GNU_undef_indirect
21402 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
);
21403 macro_undef (current_file
, line
, body
);
21408 case DW_MACRO_GNU_start_file
:
21410 unsigned int bytes_read
;
21413 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21414 mac_ptr
+= bytes_read
;
21415 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21416 mac_ptr
+= bytes_read
;
21418 if ((line
== 0 && !at_commandline
)
21419 || (line
!= 0 && at_commandline
))
21420 complaint (&symfile_complaints
,
21421 _("debug info gives source %d included "
21422 "from %s at %s line %d"),
21423 file
, at_commandline
? _("command-line") : _("file"),
21424 line
== 0 ? _("zero") : _("non-zero"), line
);
21426 if (at_commandline
)
21428 /* This DW_MACRO_GNU_start_file was executed in the
21430 at_commandline
= 0;
21433 current_file
= macro_start_file (file
, line
, current_file
, lh
);
21437 case DW_MACRO_GNU_end_file
:
21438 if (! current_file
)
21439 complaint (&symfile_complaints
,
21440 _("macro debug info has an unmatched "
21441 "`close_file' directive"));
21444 current_file
= current_file
->included_by
;
21445 if (! current_file
)
21447 enum dwarf_macro_record_type next_type
;
21449 /* GCC circa March 2002 doesn't produce the zero
21450 type byte marking the end of the compilation
21451 unit. Complain if it's not there, but exit no
21454 /* Do we at least have room for a macinfo type byte? */
21455 if (mac_ptr
>= mac_end
)
21457 dwarf2_section_buffer_overflow_complaint (section
);
21461 /* We don't increment mac_ptr here, so this is just
21464 = (enum dwarf_macro_record_type
) read_1_byte (abfd
,
21466 if (next_type
!= 0)
21467 complaint (&symfile_complaints
,
21468 _("no terminating 0-type entry for "
21469 "macros in `.debug_macinfo' section"));
21476 case DW_MACRO_GNU_transparent_include
:
21477 case DW_MACRO_GNU_transparent_include_alt
:
21481 bfd
*include_bfd
= abfd
;
21482 struct dwarf2_section_info
*include_section
= section
;
21483 const gdb_byte
*include_mac_end
= mac_end
;
21484 int is_dwz
= section_is_dwz
;
21485 const gdb_byte
*new_mac_ptr
;
21487 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
21488 mac_ptr
+= offset_size
;
21490 if (macinfo_type
== DW_MACRO_GNU_transparent_include_alt
)
21492 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
21494 dwarf2_read_section (objfile
, &dwz
->macro
);
21496 include_section
= &dwz
->macro
;
21497 include_bfd
= get_section_bfd_owner (include_section
);
21498 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
21502 new_mac_ptr
= include_section
->buffer
+ offset
;
21503 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
21507 /* This has actually happened; see
21508 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
21509 complaint (&symfile_complaints
,
21510 _("recursive DW_MACRO_GNU_transparent_include in "
21511 ".debug_macro section"));
21515 *slot
= (void *) new_mac_ptr
;
21517 dwarf_decode_macro_bytes (include_bfd
, new_mac_ptr
,
21518 include_mac_end
, current_file
, lh
,
21519 section
, section_is_gnu
, is_dwz
,
21520 offset_size
, include_hash
);
21522 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
21527 case DW_MACINFO_vendor_ext
:
21528 if (!section_is_gnu
)
21530 unsigned int bytes_read
;
21532 /* This reads the constant, but since we don't recognize
21533 any vendor extensions, we ignore it. */
21534 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21535 mac_ptr
+= bytes_read
;
21536 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21537 mac_ptr
+= bytes_read
;
21539 /* We don't recognize any vendor extensions. */
21545 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
21546 mac_ptr
, mac_end
, abfd
, offset_size
,
21548 if (mac_ptr
== NULL
)
21552 } while (macinfo_type
!= 0);
21556 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
21557 int section_is_gnu
)
21559 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21560 struct line_header
*lh
= cu
->line_header
;
21562 const gdb_byte
*mac_ptr
, *mac_end
;
21563 struct macro_source_file
*current_file
= 0;
21564 enum dwarf_macro_record_type macinfo_type
;
21565 unsigned int offset_size
= cu
->header
.offset_size
;
21566 const gdb_byte
*opcode_definitions
[256];
21567 struct cleanup
*cleanup
;
21569 struct dwarf2_section_info
*section
;
21570 const char *section_name
;
21572 if (cu
->dwo_unit
!= NULL
)
21574 if (section_is_gnu
)
21576 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
21577 section_name
= ".debug_macro.dwo";
21581 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
21582 section_name
= ".debug_macinfo.dwo";
21587 if (section_is_gnu
)
21589 section
= &dwarf2_per_objfile
->macro
;
21590 section_name
= ".debug_macro";
21594 section
= &dwarf2_per_objfile
->macinfo
;
21595 section_name
= ".debug_macinfo";
21599 dwarf2_read_section (objfile
, section
);
21600 if (section
->buffer
== NULL
)
21602 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
21605 abfd
= get_section_bfd_owner (section
);
21607 /* First pass: Find the name of the base filename.
21608 This filename is needed in order to process all macros whose definition
21609 (or undefinition) comes from the command line. These macros are defined
21610 before the first DW_MACINFO_start_file entry, and yet still need to be
21611 associated to the base file.
21613 To determine the base file name, we scan the macro definitions until we
21614 reach the first DW_MACINFO_start_file entry. We then initialize
21615 CURRENT_FILE accordingly so that any macro definition found before the
21616 first DW_MACINFO_start_file can still be associated to the base file. */
21618 mac_ptr
= section
->buffer
+ offset
;
21619 mac_end
= section
->buffer
+ section
->size
;
21621 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
21622 &offset_size
, section_is_gnu
);
21623 if (mac_ptr
== NULL
)
21625 /* We already issued a complaint. */
21631 /* Do we at least have room for a macinfo type byte? */
21632 if (mac_ptr
>= mac_end
)
21634 /* Complaint is printed during the second pass as GDB will probably
21635 stop the first pass earlier upon finding
21636 DW_MACINFO_start_file. */
21640 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
21643 /* Note that we rely on the fact that the corresponding GNU and
21644 DWARF constants are the same. */
21645 switch (macinfo_type
)
21647 /* A zero macinfo type indicates the end of the macro
21652 case DW_MACRO_GNU_define
:
21653 case DW_MACRO_GNU_undef
:
21654 /* Only skip the data by MAC_PTR. */
21656 unsigned int bytes_read
;
21658 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21659 mac_ptr
+= bytes_read
;
21660 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21661 mac_ptr
+= bytes_read
;
21665 case DW_MACRO_GNU_start_file
:
21667 unsigned int bytes_read
;
21670 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21671 mac_ptr
+= bytes_read
;
21672 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21673 mac_ptr
+= bytes_read
;
21675 current_file
= macro_start_file (file
, line
, current_file
, lh
);
21679 case DW_MACRO_GNU_end_file
:
21680 /* No data to skip by MAC_PTR. */
21683 case DW_MACRO_GNU_define_indirect
:
21684 case DW_MACRO_GNU_undef_indirect
:
21685 case DW_MACRO_GNU_define_indirect_alt
:
21686 case DW_MACRO_GNU_undef_indirect_alt
:
21688 unsigned int bytes_read
;
21690 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21691 mac_ptr
+= bytes_read
;
21692 mac_ptr
+= offset_size
;
21696 case DW_MACRO_GNU_transparent_include
:
21697 case DW_MACRO_GNU_transparent_include_alt
:
21698 /* Note that, according to the spec, a transparent include
21699 chain cannot call DW_MACRO_GNU_start_file. So, we can just
21700 skip this opcode. */
21701 mac_ptr
+= offset_size
;
21704 case DW_MACINFO_vendor_ext
:
21705 /* Only skip the data by MAC_PTR. */
21706 if (!section_is_gnu
)
21708 unsigned int bytes_read
;
21710 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21711 mac_ptr
+= bytes_read
;
21712 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21713 mac_ptr
+= bytes_read
;
21718 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
21719 mac_ptr
, mac_end
, abfd
, offset_size
,
21721 if (mac_ptr
== NULL
)
21725 } while (macinfo_type
!= 0 && current_file
== NULL
);
21727 /* Second pass: Process all entries.
21729 Use the AT_COMMAND_LINE flag to determine whether we are still processing
21730 command-line macro definitions/undefinitions. This flag is unset when we
21731 reach the first DW_MACINFO_start_file entry. */
21733 htab_up
include_hash (htab_create_alloc (1, htab_hash_pointer
,
21735 NULL
, xcalloc
, xfree
));
21736 mac_ptr
= section
->buffer
+ offset
;
21737 slot
= htab_find_slot (include_hash
.get (), mac_ptr
, INSERT
);
21738 *slot
= (void *) mac_ptr
;
21739 dwarf_decode_macro_bytes (abfd
, mac_ptr
, mac_end
,
21740 current_file
, lh
, section
,
21741 section_is_gnu
, 0, offset_size
,
21742 include_hash
.get ());
21745 /* Check if the attribute's form is a DW_FORM_block*
21746 if so return true else false. */
21749 attr_form_is_block (const struct attribute
*attr
)
21751 return (attr
== NULL
? 0 :
21752 attr
->form
== DW_FORM_block1
21753 || attr
->form
== DW_FORM_block2
21754 || attr
->form
== DW_FORM_block4
21755 || attr
->form
== DW_FORM_block
21756 || attr
->form
== DW_FORM_exprloc
);
21759 /* Return non-zero if ATTR's value is a section offset --- classes
21760 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
21761 You may use DW_UNSND (attr) to retrieve such offsets.
21763 Section 7.5.4, "Attribute Encodings", explains that no attribute
21764 may have a value that belongs to more than one of these classes; it
21765 would be ambiguous if we did, because we use the same forms for all
21769 attr_form_is_section_offset (const struct attribute
*attr
)
21771 return (attr
->form
== DW_FORM_data4
21772 || attr
->form
== DW_FORM_data8
21773 || attr
->form
== DW_FORM_sec_offset
);
21776 /* Return non-zero if ATTR's value falls in the 'constant' class, or
21777 zero otherwise. When this function returns true, you can apply
21778 dwarf2_get_attr_constant_value to it.
21780 However, note that for some attributes you must check
21781 attr_form_is_section_offset before using this test. DW_FORM_data4
21782 and DW_FORM_data8 are members of both the constant class, and of
21783 the classes that contain offsets into other debug sections
21784 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
21785 that, if an attribute's can be either a constant or one of the
21786 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
21787 taken as section offsets, not constants. */
21790 attr_form_is_constant (const struct attribute
*attr
)
21792 switch (attr
->form
)
21794 case DW_FORM_sdata
:
21795 case DW_FORM_udata
:
21796 case DW_FORM_data1
:
21797 case DW_FORM_data2
:
21798 case DW_FORM_data4
:
21799 case DW_FORM_data8
:
21807 /* DW_ADDR is always stored already as sect_offset; despite for the forms
21808 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
21811 attr_form_is_ref (const struct attribute
*attr
)
21813 switch (attr
->form
)
21815 case DW_FORM_ref_addr
:
21820 case DW_FORM_ref_udata
:
21821 case DW_FORM_GNU_ref_alt
:
21828 /* Return the .debug_loc section to use for CU.
21829 For DWO files use .debug_loc.dwo. */
21831 static struct dwarf2_section_info
*
21832 cu_debug_loc_section (struct dwarf2_cu
*cu
)
21835 return &cu
->dwo_unit
->dwo_file
->sections
.loc
;
21836 return &dwarf2_per_objfile
->loc
;
21839 /* A helper function that fills in a dwarf2_loclist_baton. */
21842 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
21843 struct dwarf2_loclist_baton
*baton
,
21844 const struct attribute
*attr
)
21846 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
21848 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
21850 baton
->per_cu
= cu
->per_cu
;
21851 gdb_assert (baton
->per_cu
);
21852 /* We don't know how long the location list is, but make sure we
21853 don't run off the edge of the section. */
21854 baton
->size
= section
->size
- DW_UNSND (attr
);
21855 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
21856 baton
->base_address
= cu
->base_address
;
21857 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
21861 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
21862 struct dwarf2_cu
*cu
, int is_block
)
21864 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21865 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
21867 if (attr_form_is_section_offset (attr
)
21868 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
21869 the section. If so, fall through to the complaint in the
21871 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
21873 struct dwarf2_loclist_baton
*baton
;
21875 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
21877 fill_in_loclist_baton (cu
, baton
, attr
);
21879 if (cu
->base_known
== 0)
21880 complaint (&symfile_complaints
,
21881 _("Location list used without "
21882 "specifying the CU base address."));
21884 SYMBOL_ACLASS_INDEX (sym
) = (is_block
21885 ? dwarf2_loclist_block_index
21886 : dwarf2_loclist_index
);
21887 SYMBOL_LOCATION_BATON (sym
) = baton
;
21891 struct dwarf2_locexpr_baton
*baton
;
21893 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
21894 baton
->per_cu
= cu
->per_cu
;
21895 gdb_assert (baton
->per_cu
);
21897 if (attr_form_is_block (attr
))
21899 /* Note that we're just copying the block's data pointer
21900 here, not the actual data. We're still pointing into the
21901 info_buffer for SYM's objfile; right now we never release
21902 that buffer, but when we do clean up properly this may
21904 baton
->size
= DW_BLOCK (attr
)->size
;
21905 baton
->data
= DW_BLOCK (attr
)->data
;
21909 dwarf2_invalid_attrib_class_complaint ("location description",
21910 SYMBOL_NATURAL_NAME (sym
));
21914 SYMBOL_ACLASS_INDEX (sym
) = (is_block
21915 ? dwarf2_locexpr_block_index
21916 : dwarf2_locexpr_index
);
21917 SYMBOL_LOCATION_BATON (sym
) = baton
;
21921 /* Return the OBJFILE associated with the compilation unit CU. If CU
21922 came from a separate debuginfo file, then the master objfile is
21926 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
21928 struct objfile
*objfile
= per_cu
->objfile
;
21930 /* Return the master objfile, so that we can report and look up the
21931 correct file containing this variable. */
21932 if (objfile
->separate_debug_objfile_backlink
)
21933 objfile
= objfile
->separate_debug_objfile_backlink
;
21938 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
21939 (CU_HEADERP is unused in such case) or prepare a temporary copy at
21940 CU_HEADERP first. */
21942 static const struct comp_unit_head
*
21943 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
21944 struct dwarf2_per_cu_data
*per_cu
)
21946 const gdb_byte
*info_ptr
;
21949 return &per_cu
->cu
->header
;
21951 info_ptr
= per_cu
->section
->buffer
+ per_cu
->offset
.sect_off
;
21953 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
21954 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->objfile
->obfd
);
21959 /* Return the address size given in the compilation unit header for CU. */
21962 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
21964 struct comp_unit_head cu_header_local
;
21965 const struct comp_unit_head
*cu_headerp
;
21967 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21969 return cu_headerp
->addr_size
;
21972 /* Return the offset size given in the compilation unit header for CU. */
21975 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
21977 struct comp_unit_head cu_header_local
;
21978 const struct comp_unit_head
*cu_headerp
;
21980 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21982 return cu_headerp
->offset_size
;
21985 /* See its dwarf2loc.h declaration. */
21988 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
21990 struct comp_unit_head cu_header_local
;
21991 const struct comp_unit_head
*cu_headerp
;
21993 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21995 if (cu_headerp
->version
== 2)
21996 return cu_headerp
->addr_size
;
21998 return cu_headerp
->offset_size
;
22001 /* Return the text offset of the CU. The returned offset comes from
22002 this CU's objfile. If this objfile came from a separate debuginfo
22003 file, then the offset may be different from the corresponding
22004 offset in the parent objfile. */
22007 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
22009 struct objfile
*objfile
= per_cu
->objfile
;
22011 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
22014 /* Locate the .debug_info compilation unit from CU's objfile which contains
22015 the DIE at OFFSET. Raises an error on failure. */
22017 static struct dwarf2_per_cu_data
*
22018 dwarf2_find_containing_comp_unit (sect_offset offset
,
22019 unsigned int offset_in_dwz
,
22020 struct objfile
*objfile
)
22022 struct dwarf2_per_cu_data
*this_cu
;
22024 const sect_offset
*cu_off
;
22027 high
= dwarf2_per_objfile
->n_comp_units
- 1;
22030 struct dwarf2_per_cu_data
*mid_cu
;
22031 int mid
= low
+ (high
- low
) / 2;
22033 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
22034 cu_off
= &mid_cu
->offset
;
22035 if (mid_cu
->is_dwz
> offset_in_dwz
22036 || (mid_cu
->is_dwz
== offset_in_dwz
22037 && cu_off
->sect_off
>= offset
.sect_off
))
22042 gdb_assert (low
== high
);
22043 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
22044 cu_off
= &this_cu
->offset
;
22045 if (this_cu
->is_dwz
!= offset_in_dwz
|| cu_off
->sect_off
> offset
.sect_off
)
22047 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
22048 error (_("Dwarf Error: could not find partial DIE containing "
22049 "offset 0x%lx [in module %s]"),
22050 (long) offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
22052 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
.sect_off
22053 <= offset
.sect_off
);
22054 return dwarf2_per_objfile
->all_comp_units
[low
-1];
22058 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
22059 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
22060 && offset
.sect_off
>= this_cu
->offset
.sect_off
+ this_cu
->length
)
22061 error (_("invalid dwarf2 offset %u"), offset
.sect_off
);
22062 gdb_assert (offset
.sect_off
< this_cu
->offset
.sect_off
+ this_cu
->length
);
22067 /* Initialize dwarf2_cu CU, owned by PER_CU. */
22070 init_one_comp_unit (struct dwarf2_cu
*cu
, struct dwarf2_per_cu_data
*per_cu
)
22072 memset (cu
, 0, sizeof (*cu
));
22074 cu
->per_cu
= per_cu
;
22075 cu
->objfile
= per_cu
->objfile
;
22076 obstack_init (&cu
->comp_unit_obstack
);
22079 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
22082 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
22083 enum language pretend_language
)
22085 struct attribute
*attr
;
22087 /* Set the language we're debugging. */
22088 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
22090 set_cu_language (DW_UNSND (attr
), cu
);
22093 cu
->language
= pretend_language
;
22094 cu
->language_defn
= language_def (cu
->language
);
22097 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
22100 /* Release one cached compilation unit, CU. We unlink it from the tree
22101 of compilation units, but we don't remove it from the read_in_chain;
22102 the caller is responsible for that.
22103 NOTE: DATA is a void * because this function is also used as a
22104 cleanup routine. */
22107 free_heap_comp_unit (void *data
)
22109 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) data
;
22111 gdb_assert (cu
->per_cu
!= NULL
);
22112 cu
->per_cu
->cu
= NULL
;
22115 obstack_free (&cu
->comp_unit_obstack
, NULL
);
22120 /* This cleanup function is passed the address of a dwarf2_cu on the stack
22121 when we're finished with it. We can't free the pointer itself, but be
22122 sure to unlink it from the cache. Also release any associated storage. */
22125 free_stack_comp_unit (void *data
)
22127 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) data
;
22129 gdb_assert (cu
->per_cu
!= NULL
);
22130 cu
->per_cu
->cu
= NULL
;
22133 obstack_free (&cu
->comp_unit_obstack
, NULL
);
22134 cu
->partial_dies
= NULL
;
22137 /* Free all cached compilation units. */
22140 free_cached_comp_units (void *data
)
22142 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22144 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22145 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22146 while (per_cu
!= NULL
)
22148 struct dwarf2_per_cu_data
*next_cu
;
22150 next_cu
= per_cu
->cu
->read_in_chain
;
22152 free_heap_comp_unit (per_cu
->cu
);
22153 *last_chain
= next_cu
;
22159 /* Increase the age counter on each cached compilation unit, and free
22160 any that are too old. */
22163 age_cached_comp_units (void)
22165 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22167 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
22168 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22169 while (per_cu
!= NULL
)
22171 per_cu
->cu
->last_used
++;
22172 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
22173 dwarf2_mark (per_cu
->cu
);
22174 per_cu
= per_cu
->cu
->read_in_chain
;
22177 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22178 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22179 while (per_cu
!= NULL
)
22181 struct dwarf2_per_cu_data
*next_cu
;
22183 next_cu
= per_cu
->cu
->read_in_chain
;
22185 if (!per_cu
->cu
->mark
)
22187 free_heap_comp_unit (per_cu
->cu
);
22188 *last_chain
= next_cu
;
22191 last_chain
= &per_cu
->cu
->read_in_chain
;
22197 /* Remove a single compilation unit from the cache. */
22200 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
22202 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22204 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22205 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22206 while (per_cu
!= NULL
)
22208 struct dwarf2_per_cu_data
*next_cu
;
22210 next_cu
= per_cu
->cu
->read_in_chain
;
22212 if (per_cu
== target_per_cu
)
22214 free_heap_comp_unit (per_cu
->cu
);
22216 *last_chain
= next_cu
;
22220 last_chain
= &per_cu
->cu
->read_in_chain
;
22226 /* Release all extra memory associated with OBJFILE. */
22229 dwarf2_free_objfile (struct objfile
*objfile
)
22232 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
22233 dwarf2_objfile_data_key
);
22235 if (dwarf2_per_objfile
== NULL
)
22238 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
22239 free_cached_comp_units (NULL
);
22241 if (dwarf2_per_objfile
->quick_file_names_table
)
22242 htab_delete (dwarf2_per_objfile
->quick_file_names_table
);
22244 if (dwarf2_per_objfile
->line_header_hash
)
22245 htab_delete (dwarf2_per_objfile
->line_header_hash
);
22247 /* Everything else should be on the objfile obstack. */
22250 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
22251 We store these in a hash table separate from the DIEs, and preserve them
22252 when the DIEs are flushed out of cache.
22254 The CU "per_cu" pointer is needed because offset alone is not enough to
22255 uniquely identify the type. A file may have multiple .debug_types sections,
22256 or the type may come from a DWO file. Furthermore, while it's more logical
22257 to use per_cu->section+offset, with Fission the section with the data is in
22258 the DWO file but we don't know that section at the point we need it.
22259 We have to use something in dwarf2_per_cu_data (or the pointer to it)
22260 because we can enter the lookup routine, get_die_type_at_offset, from
22261 outside this file, and thus won't necessarily have PER_CU->cu.
22262 Fortunately, PER_CU is stable for the life of the objfile. */
22264 struct dwarf2_per_cu_offset_and_type
22266 const struct dwarf2_per_cu_data
*per_cu
;
22267 sect_offset offset
;
22271 /* Hash function for a dwarf2_per_cu_offset_and_type. */
22274 per_cu_offset_and_type_hash (const void *item
)
22276 const struct dwarf2_per_cu_offset_and_type
*ofs
22277 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
22279 return (uintptr_t) ofs
->per_cu
+ ofs
->offset
.sect_off
;
22282 /* Equality function for a dwarf2_per_cu_offset_and_type. */
22285 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
22287 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
22288 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
22289 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
22290 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
22292 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
22293 && ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
);
22296 /* Set the type associated with DIE to TYPE. Save it in CU's hash
22297 table if necessary. For convenience, return TYPE.
22299 The DIEs reading must have careful ordering to:
22300 * Not cause infite loops trying to read in DIEs as a prerequisite for
22301 reading current DIE.
22302 * Not trying to dereference contents of still incompletely read in types
22303 while reading in other DIEs.
22304 * Enable referencing still incompletely read in types just by a pointer to
22305 the type without accessing its fields.
22307 Therefore caller should follow these rules:
22308 * Try to fetch any prerequisite types we may need to build this DIE type
22309 before building the type and calling set_die_type.
22310 * After building type call set_die_type for current DIE as soon as
22311 possible before fetching more types to complete the current type.
22312 * Make the type as complete as possible before fetching more types. */
22314 static struct type
*
22315 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
22317 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
22318 struct objfile
*objfile
= cu
->objfile
;
22319 struct attribute
*attr
;
22320 struct dynamic_prop prop
;
22322 /* For Ada types, make sure that the gnat-specific data is always
22323 initialized (if not already set). There are a few types where
22324 we should not be doing so, because the type-specific area is
22325 already used to hold some other piece of info (eg: TYPE_CODE_FLT
22326 where the type-specific area is used to store the floatformat).
22327 But this is not a problem, because the gnat-specific information
22328 is actually not needed for these types. */
22329 if (need_gnat_info (cu
)
22330 && TYPE_CODE (type
) != TYPE_CODE_FUNC
22331 && TYPE_CODE (type
) != TYPE_CODE_FLT
22332 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
22333 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
22334 && TYPE_CODE (type
) != TYPE_CODE_METHOD
22335 && !HAVE_GNAT_AUX_INFO (type
))
22336 INIT_GNAT_SPECIFIC (type
);
22338 /* Read DW_AT_allocated and set in type. */
22339 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
22340 if (attr_form_is_block (attr
))
22342 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
22343 add_dyn_prop (DYN_PROP_ALLOCATED
, prop
, type
, objfile
);
22345 else if (attr
!= NULL
)
22347 complaint (&symfile_complaints
,
22348 _("DW_AT_allocated has the wrong form (%s) at DIE 0x%x"),
22349 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
22350 die
->offset
.sect_off
);
22353 /* Read DW_AT_associated and set in type. */
22354 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
22355 if (attr_form_is_block (attr
))
22357 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
22358 add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
, type
, objfile
);
22360 else if (attr
!= NULL
)
22362 complaint (&symfile_complaints
,
22363 _("DW_AT_associated has the wrong form (%s) at DIE 0x%x"),
22364 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
22365 die
->offset
.sect_off
);
22368 /* Read DW_AT_data_location and set in type. */
22369 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
22370 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
22371 add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
, type
, objfile
);
22373 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
22375 dwarf2_per_objfile
->die_type_hash
=
22376 htab_create_alloc_ex (127,
22377 per_cu_offset_and_type_hash
,
22378 per_cu_offset_and_type_eq
,
22380 &objfile
->objfile_obstack
,
22381 hashtab_obstack_allocate
,
22382 dummy_obstack_deallocate
);
22385 ofs
.per_cu
= cu
->per_cu
;
22386 ofs
.offset
= die
->offset
;
22388 slot
= (struct dwarf2_per_cu_offset_and_type
**)
22389 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
22391 complaint (&symfile_complaints
,
22392 _("A problem internal to GDB: DIE 0x%x has type already set"),
22393 die
->offset
.sect_off
);
22394 *slot
= XOBNEW (&objfile
->objfile_obstack
,
22395 struct dwarf2_per_cu_offset_and_type
);
22400 /* Look up the type for the die at OFFSET in PER_CU in die_type_hash,
22401 or return NULL if the die does not have a saved type. */
22403 static struct type
*
22404 get_die_type_at_offset (sect_offset offset
,
22405 struct dwarf2_per_cu_data
*per_cu
)
22407 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
22409 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
22412 ofs
.per_cu
= per_cu
;
22413 ofs
.offset
= offset
;
22414 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
22415 htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
));
22422 /* Look up the type for DIE in CU in die_type_hash,
22423 or return NULL if DIE does not have a saved type. */
22425 static struct type
*
22426 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22428 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
22431 /* Add a dependence relationship from CU to REF_PER_CU. */
22434 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
22435 struct dwarf2_per_cu_data
*ref_per_cu
)
22439 if (cu
->dependencies
== NULL
)
22441 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
22442 NULL
, &cu
->comp_unit_obstack
,
22443 hashtab_obstack_allocate
,
22444 dummy_obstack_deallocate
);
22446 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
22448 *slot
= ref_per_cu
;
22451 /* Subroutine of dwarf2_mark to pass to htab_traverse.
22452 Set the mark field in every compilation unit in the
22453 cache that we must keep because we are keeping CU. */
22456 dwarf2_mark_helper (void **slot
, void *data
)
22458 struct dwarf2_per_cu_data
*per_cu
;
22460 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
22462 /* cu->dependencies references may not yet have been ever read if QUIT aborts
22463 reading of the chain. As such dependencies remain valid it is not much
22464 useful to track and undo them during QUIT cleanups. */
22465 if (per_cu
->cu
== NULL
)
22468 if (per_cu
->cu
->mark
)
22470 per_cu
->cu
->mark
= 1;
22472 if (per_cu
->cu
->dependencies
!= NULL
)
22473 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
22478 /* Set the mark field in CU and in every other compilation unit in the
22479 cache that we must keep because we are keeping CU. */
22482 dwarf2_mark (struct dwarf2_cu
*cu
)
22487 if (cu
->dependencies
!= NULL
)
22488 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
22492 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
22496 per_cu
->cu
->mark
= 0;
22497 per_cu
= per_cu
->cu
->read_in_chain
;
22501 /* Trivial hash function for partial_die_info: the hash value of a DIE
22502 is its offset in .debug_info for this objfile. */
22505 partial_die_hash (const void *item
)
22507 const struct partial_die_info
*part_die
22508 = (const struct partial_die_info
*) item
;
22510 return part_die
->offset
.sect_off
;
22513 /* Trivial comparison function for partial_die_info structures: two DIEs
22514 are equal if they have the same offset. */
22517 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
22519 const struct partial_die_info
*part_die_lhs
22520 = (const struct partial_die_info
*) item_lhs
;
22521 const struct partial_die_info
*part_die_rhs
22522 = (const struct partial_die_info
*) item_rhs
;
22524 return part_die_lhs
->offset
.sect_off
== part_die_rhs
->offset
.sect_off
;
22527 static struct cmd_list_element
*set_dwarf_cmdlist
;
22528 static struct cmd_list_element
*show_dwarf_cmdlist
;
22531 set_dwarf_cmd (char *args
, int from_tty
)
22533 help_list (set_dwarf_cmdlist
, "maintenance set dwarf ", all_commands
,
22538 show_dwarf_cmd (char *args
, int from_tty
)
22540 cmd_show_list (show_dwarf_cmdlist
, from_tty
, "");
22543 /* Free data associated with OBJFILE, if necessary. */
22546 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
22548 struct dwarf2_per_objfile
*data
= (struct dwarf2_per_objfile
*) d
;
22551 /* Make sure we don't accidentally use dwarf2_per_objfile while
22553 dwarf2_per_objfile
= NULL
;
22555 for (ix
= 0; ix
< data
->n_comp_units
; ++ix
)
22556 VEC_free (dwarf2_per_cu_ptr
, data
->all_comp_units
[ix
]->imported_symtabs
);
22558 for (ix
= 0; ix
< data
->n_type_units
; ++ix
)
22559 VEC_free (dwarf2_per_cu_ptr
,
22560 data
->all_type_units
[ix
]->per_cu
.imported_symtabs
);
22561 xfree (data
->all_type_units
);
22563 VEC_free (dwarf2_section_info_def
, data
->types
);
22565 if (data
->dwo_files
)
22566 free_dwo_files (data
->dwo_files
, objfile
);
22567 if (data
->dwp_file
)
22568 gdb_bfd_unref (data
->dwp_file
->dbfd
);
22570 if (data
->dwz_file
&& data
->dwz_file
->dwz_bfd
)
22571 gdb_bfd_unref (data
->dwz_file
->dwz_bfd
);
22575 /* The "save gdb-index" command. */
22577 /* The contents of the hash table we create when building the string
22579 struct strtab_entry
22581 offset_type offset
;
22585 /* Hash function for a strtab_entry.
22587 Function is used only during write_hash_table so no index format backward
22588 compatibility is needed. */
22591 hash_strtab_entry (const void *e
)
22593 const struct strtab_entry
*entry
= (const struct strtab_entry
*) e
;
22594 return mapped_index_string_hash (INT_MAX
, entry
->str
);
22597 /* Equality function for a strtab_entry. */
22600 eq_strtab_entry (const void *a
, const void *b
)
22602 const struct strtab_entry
*ea
= (const struct strtab_entry
*) a
;
22603 const struct strtab_entry
*eb
= (const struct strtab_entry
*) b
;
22604 return !strcmp (ea
->str
, eb
->str
);
22607 /* Create a strtab_entry hash table. */
22610 create_strtab (void)
22612 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
22613 xfree
, xcalloc
, xfree
);
22616 /* Add a string to the constant pool. Return the string's offset in
22620 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
22623 struct strtab_entry entry
;
22624 struct strtab_entry
*result
;
22627 slot
= htab_find_slot (table
, &entry
, INSERT
);
22629 result
= (struct strtab_entry
*) *slot
;
22632 result
= XNEW (struct strtab_entry
);
22633 result
->offset
= obstack_object_size (cpool
);
22635 obstack_grow_str0 (cpool
, str
);
22638 return result
->offset
;
22641 /* An entry in the symbol table. */
22642 struct symtab_index_entry
22644 /* The name of the symbol. */
22646 /* The offset of the name in the constant pool. */
22647 offset_type index_offset
;
22648 /* A sorted vector of the indices of all the CUs that hold an object
22650 VEC (offset_type
) *cu_indices
;
22653 /* The symbol table. This is a power-of-2-sized hash table. */
22654 struct mapped_symtab
22656 offset_type n_elements
;
22658 struct symtab_index_entry
**data
;
22661 /* Hash function for a symtab_index_entry. */
22664 hash_symtab_entry (const void *e
)
22666 const struct symtab_index_entry
*entry
22667 = (const struct symtab_index_entry
*) e
;
22668 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
22669 sizeof (offset_type
) * VEC_length (offset_type
,
22670 entry
->cu_indices
),
22674 /* Equality function for a symtab_index_entry. */
22677 eq_symtab_entry (const void *a
, const void *b
)
22679 const struct symtab_index_entry
*ea
= (const struct symtab_index_entry
*) a
;
22680 const struct symtab_index_entry
*eb
= (const struct symtab_index_entry
*) b
;
22681 int len
= VEC_length (offset_type
, ea
->cu_indices
);
22682 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
22684 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
22685 VEC_address (offset_type
, eb
->cu_indices
),
22686 sizeof (offset_type
) * len
);
22689 /* Destroy a symtab_index_entry. */
22692 delete_symtab_entry (void *p
)
22694 struct symtab_index_entry
*entry
= (struct symtab_index_entry
*) p
;
22695 VEC_free (offset_type
, entry
->cu_indices
);
22699 /* Create a hash table holding symtab_index_entry objects. */
22702 create_symbol_hash_table (void)
22704 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
22705 delete_symtab_entry
, xcalloc
, xfree
);
22708 /* Create a new mapped symtab object. */
22710 static struct mapped_symtab
*
22711 create_mapped_symtab (void)
22713 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
22714 symtab
->n_elements
= 0;
22715 symtab
->size
= 1024;
22716 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
22720 /* Destroy a mapped_symtab. */
22723 cleanup_mapped_symtab (void *p
)
22725 struct mapped_symtab
*symtab
= (struct mapped_symtab
*) p
;
22726 /* The contents of the array are freed when the other hash table is
22728 xfree (symtab
->data
);
22732 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
22735 Function is used only during write_hash_table so no index format backward
22736 compatibility is needed. */
22738 static struct symtab_index_entry
**
22739 find_slot (struct mapped_symtab
*symtab
, const char *name
)
22741 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
22743 index
= hash
& (symtab
->size
- 1);
22744 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
22748 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
22749 return &symtab
->data
[index
];
22750 index
= (index
+ step
) & (symtab
->size
- 1);
22754 /* Expand SYMTAB's hash table. */
22757 hash_expand (struct mapped_symtab
*symtab
)
22759 offset_type old_size
= symtab
->size
;
22761 struct symtab_index_entry
**old_entries
= symtab
->data
;
22764 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
22766 for (i
= 0; i
< old_size
; ++i
)
22768 if (old_entries
[i
])
22770 struct symtab_index_entry
**slot
= find_slot (symtab
,
22771 old_entries
[i
]->name
);
22772 *slot
= old_entries
[i
];
22776 xfree (old_entries
);
22779 /* Add an entry to SYMTAB. NAME is the name of the symbol.
22780 CU_INDEX is the index of the CU in which the symbol appears.
22781 IS_STATIC is one if the symbol is static, otherwise zero (global). */
22784 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
22785 int is_static
, gdb_index_symbol_kind kind
,
22786 offset_type cu_index
)
22788 struct symtab_index_entry
**slot
;
22789 offset_type cu_index_and_attrs
;
22791 ++symtab
->n_elements
;
22792 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
22793 hash_expand (symtab
);
22795 slot
= find_slot (symtab
, name
);
22798 *slot
= XNEW (struct symtab_index_entry
);
22799 (*slot
)->name
= name
;
22800 /* index_offset is set later. */
22801 (*slot
)->cu_indices
= NULL
;
22804 cu_index_and_attrs
= 0;
22805 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs
, cu_index
);
22806 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs
, is_static
);
22807 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs
, kind
);
22809 /* We don't want to record an index value twice as we want to avoid the
22811 We process all global symbols and then all static symbols
22812 (which would allow us to avoid the duplication by only having to check
22813 the last entry pushed), but a symbol could have multiple kinds in one CU.
22814 To keep things simple we don't worry about the duplication here and
22815 sort and uniqufy the list after we've processed all symbols. */
22816 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index_and_attrs
);
22819 /* qsort helper routine for uniquify_cu_indices. */
22822 offset_type_compare (const void *ap
, const void *bp
)
22824 offset_type a
= *(offset_type
*) ap
;
22825 offset_type b
= *(offset_type
*) bp
;
22827 return (a
> b
) - (b
> a
);
22830 /* Sort and remove duplicates of all symbols' cu_indices lists. */
22833 uniquify_cu_indices (struct mapped_symtab
*symtab
)
22837 for (i
= 0; i
< symtab
->size
; ++i
)
22839 struct symtab_index_entry
*entry
= symtab
->data
[i
];
22842 && entry
->cu_indices
!= NULL
)
22844 unsigned int next_to_insert
, next_to_check
;
22845 offset_type last_value
;
22847 qsort (VEC_address (offset_type
, entry
->cu_indices
),
22848 VEC_length (offset_type
, entry
->cu_indices
),
22849 sizeof (offset_type
), offset_type_compare
);
22851 last_value
= VEC_index (offset_type
, entry
->cu_indices
, 0);
22852 next_to_insert
= 1;
22853 for (next_to_check
= 1;
22854 next_to_check
< VEC_length (offset_type
, entry
->cu_indices
);
22857 if (VEC_index (offset_type
, entry
->cu_indices
, next_to_check
)
22860 last_value
= VEC_index (offset_type
, entry
->cu_indices
,
22862 VEC_replace (offset_type
, entry
->cu_indices
, next_to_insert
,
22867 VEC_truncate (offset_type
, entry
->cu_indices
, next_to_insert
);
22872 /* Add a vector of indices to the constant pool. */
22875 add_indices_to_cpool (htab_t symbol_hash_table
, struct obstack
*cpool
,
22876 struct symtab_index_entry
*entry
)
22880 slot
= htab_find_slot (symbol_hash_table
, entry
, INSERT
);
22883 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
22884 offset_type val
= MAYBE_SWAP (len
);
22889 entry
->index_offset
= obstack_object_size (cpool
);
22891 obstack_grow (cpool
, &val
, sizeof (val
));
22893 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
22896 val
= MAYBE_SWAP (iter
);
22897 obstack_grow (cpool
, &val
, sizeof (val
));
22902 struct symtab_index_entry
*old_entry
22903 = (struct symtab_index_entry
*) *slot
;
22904 entry
->index_offset
= old_entry
->index_offset
;
22907 return entry
->index_offset
;
22910 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
22911 constant pool entries going into the obstack CPOOL. */
22914 write_hash_table (struct mapped_symtab
*symtab
,
22915 struct obstack
*output
, struct obstack
*cpool
)
22918 htab_t symbol_hash_table
;
22921 symbol_hash_table
= create_symbol_hash_table ();
22922 str_table
= create_strtab ();
22924 /* We add all the index vectors to the constant pool first, to
22925 ensure alignment is ok. */
22926 for (i
= 0; i
< symtab
->size
; ++i
)
22928 if (symtab
->data
[i
])
22929 add_indices_to_cpool (symbol_hash_table
, cpool
, symtab
->data
[i
]);
22932 /* Now write out the hash table. */
22933 for (i
= 0; i
< symtab
->size
; ++i
)
22935 offset_type str_off
, vec_off
;
22937 if (symtab
->data
[i
])
22939 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
22940 vec_off
= symtab
->data
[i
]->index_offset
;
22944 /* While 0 is a valid constant pool index, it is not valid
22945 to have 0 for both offsets. */
22950 str_off
= MAYBE_SWAP (str_off
);
22951 vec_off
= MAYBE_SWAP (vec_off
);
22953 obstack_grow (output
, &str_off
, sizeof (str_off
));
22954 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
22957 htab_delete (str_table
);
22958 htab_delete (symbol_hash_table
);
22961 /* Struct to map psymtab to CU index in the index file. */
22962 struct psymtab_cu_index_map
22964 struct partial_symtab
*psymtab
;
22965 unsigned int cu_index
;
22969 hash_psymtab_cu_index (const void *item
)
22971 const struct psymtab_cu_index_map
*map
22972 = (const struct psymtab_cu_index_map
*) item
;
22974 return htab_hash_pointer (map
->psymtab
);
22978 eq_psymtab_cu_index (const void *item_lhs
, const void *item_rhs
)
22980 const struct psymtab_cu_index_map
*lhs
22981 = (const struct psymtab_cu_index_map
*) item_lhs
;
22982 const struct psymtab_cu_index_map
*rhs
22983 = (const struct psymtab_cu_index_map
*) item_rhs
;
22985 return lhs
->psymtab
== rhs
->psymtab
;
22988 /* Helper struct for building the address table. */
22989 struct addrmap_index_data
22991 struct objfile
*objfile
;
22992 struct obstack
*addr_obstack
;
22993 htab_t cu_index_htab
;
22995 /* Non-zero if the previous_* fields are valid.
22996 We can't write an entry until we see the next entry (since it is only then
22997 that we know the end of the entry). */
22998 int previous_valid
;
22999 /* Index of the CU in the table of all CUs in the index file. */
23000 unsigned int previous_cu_index
;
23001 /* Start address of the CU. */
23002 CORE_ADDR previous_cu_start
;
23005 /* Write an address entry to OBSTACK. */
23008 add_address_entry (struct objfile
*objfile
, struct obstack
*obstack
,
23009 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
23011 offset_type cu_index_to_write
;
23013 CORE_ADDR baseaddr
;
23015 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
23017 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
23018 obstack_grow (obstack
, addr
, 8);
23019 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
23020 obstack_grow (obstack
, addr
, 8);
23021 cu_index_to_write
= MAYBE_SWAP (cu_index
);
23022 obstack_grow (obstack
, &cu_index_to_write
, sizeof (offset_type
));
23025 /* Worker function for traversing an addrmap to build the address table. */
23028 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
23030 struct addrmap_index_data
*data
= (struct addrmap_index_data
*) datap
;
23031 struct partial_symtab
*pst
= (struct partial_symtab
*) obj
;
23033 if (data
->previous_valid
)
23034 add_address_entry (data
->objfile
, data
->addr_obstack
,
23035 data
->previous_cu_start
, start_addr
,
23036 data
->previous_cu_index
);
23038 data
->previous_cu_start
= start_addr
;
23041 struct psymtab_cu_index_map find_map
, *map
;
23042 find_map
.psymtab
= pst
;
23043 map
= ((struct psymtab_cu_index_map
*)
23044 htab_find (data
->cu_index_htab
, &find_map
));
23045 gdb_assert (map
!= NULL
);
23046 data
->previous_cu_index
= map
->cu_index
;
23047 data
->previous_valid
= 1;
23050 data
->previous_valid
= 0;
23055 /* Write OBJFILE's address map to OBSTACK.
23056 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
23057 in the index file. */
23060 write_address_map (struct objfile
*objfile
, struct obstack
*obstack
,
23061 htab_t cu_index_htab
)
23063 struct addrmap_index_data addrmap_index_data
;
23065 /* When writing the address table, we have to cope with the fact that
23066 the addrmap iterator only provides the start of a region; we have to
23067 wait until the next invocation to get the start of the next region. */
23069 addrmap_index_data
.objfile
= objfile
;
23070 addrmap_index_data
.addr_obstack
= obstack
;
23071 addrmap_index_data
.cu_index_htab
= cu_index_htab
;
23072 addrmap_index_data
.previous_valid
= 0;
23074 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
23075 &addrmap_index_data
);
23077 /* It's highly unlikely the last entry (end address = 0xff...ff)
23078 is valid, but we should still handle it.
23079 The end address is recorded as the start of the next region, but that
23080 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
23082 if (addrmap_index_data
.previous_valid
)
23083 add_address_entry (objfile
, obstack
,
23084 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
23085 addrmap_index_data
.previous_cu_index
);
23088 /* Return the symbol kind of PSYM. */
23090 static gdb_index_symbol_kind
23091 symbol_kind (struct partial_symbol
*psym
)
23093 domain_enum domain
= PSYMBOL_DOMAIN (psym
);
23094 enum address_class aclass
= PSYMBOL_CLASS (psym
);
23102 return GDB_INDEX_SYMBOL_KIND_FUNCTION
;
23104 return GDB_INDEX_SYMBOL_KIND_TYPE
;
23106 case LOC_CONST_BYTES
:
23107 case LOC_OPTIMIZED_OUT
:
23109 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
23111 /* Note: It's currently impossible to recognize psyms as enum values
23112 short of reading the type info. For now punt. */
23113 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
23115 /* There are other LOC_FOO values that one might want to classify
23116 as variables, but dwarf2read.c doesn't currently use them. */
23117 return GDB_INDEX_SYMBOL_KIND_OTHER
;
23119 case STRUCT_DOMAIN
:
23120 return GDB_INDEX_SYMBOL_KIND_TYPE
;
23122 return GDB_INDEX_SYMBOL_KIND_OTHER
;
23126 /* Add a list of partial symbols to SYMTAB. */
23129 write_psymbols (struct mapped_symtab
*symtab
,
23131 struct partial_symbol
**psymp
,
23133 offset_type cu_index
,
23136 for (; count
-- > 0; ++psymp
)
23138 struct partial_symbol
*psym
= *psymp
;
23141 if (SYMBOL_LANGUAGE (psym
) == language_ada
)
23142 error (_("Ada is not currently supported by the index"));
23144 /* Only add a given psymbol once. */
23145 slot
= htab_find_slot (psyms_seen
, psym
, INSERT
);
23148 gdb_index_symbol_kind kind
= symbol_kind (psym
);
23151 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (psym
),
23152 is_static
, kind
, cu_index
);
23157 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
23158 exception if there is an error. */
23161 write_obstack (FILE *file
, struct obstack
*obstack
)
23163 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
23165 != obstack_object_size (obstack
))
23166 error (_("couldn't data write to file"));
23169 /* A helper struct used when iterating over debug_types. */
23170 struct signatured_type_index_data
23172 struct objfile
*objfile
;
23173 struct mapped_symtab
*symtab
;
23174 struct obstack
*types_list
;
23179 /* A helper function that writes a single signatured_type to an
23183 write_one_signatured_type (void **slot
, void *d
)
23185 struct signatured_type_index_data
*info
23186 = (struct signatured_type_index_data
*) d
;
23187 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
23188 struct partial_symtab
*psymtab
= entry
->per_cu
.v
.psymtab
;
23191 write_psymbols (info
->symtab
,
23193 info
->objfile
->global_psymbols
.list
23194 + psymtab
->globals_offset
,
23195 psymtab
->n_global_syms
, info
->cu_index
,
23197 write_psymbols (info
->symtab
,
23199 info
->objfile
->static_psymbols
.list
23200 + psymtab
->statics_offset
,
23201 psymtab
->n_static_syms
, info
->cu_index
,
23204 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23205 entry
->per_cu
.offset
.sect_off
);
23206 obstack_grow (info
->types_list
, val
, 8);
23207 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23208 entry
->type_offset_in_tu
.cu_off
);
23209 obstack_grow (info
->types_list
, val
, 8);
23210 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
23211 obstack_grow (info
->types_list
, val
, 8);
23218 /* Recurse into all "included" dependencies and write their symbols as
23219 if they appeared in this psymtab. */
23222 recursively_write_psymbols (struct objfile
*objfile
,
23223 struct partial_symtab
*psymtab
,
23224 struct mapped_symtab
*symtab
,
23226 offset_type cu_index
)
23230 for (i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
23231 if (psymtab
->dependencies
[i
]->user
!= NULL
)
23232 recursively_write_psymbols (objfile
, psymtab
->dependencies
[i
],
23233 symtab
, psyms_seen
, cu_index
);
23235 write_psymbols (symtab
,
23237 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
23238 psymtab
->n_global_syms
, cu_index
,
23240 write_psymbols (symtab
,
23242 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
23243 psymtab
->n_static_syms
, cu_index
,
23247 /* Create an index file for OBJFILE in the directory DIR. */
23250 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
23252 struct cleanup
*cleanup
;
23254 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
23255 struct obstack cu_list
, types_cu_list
;
23258 struct mapped_symtab
*symtab
;
23259 offset_type val
, size_of_contents
, total_len
;
23261 struct psymtab_cu_index_map
*psymtab_cu_index_map
;
23263 if (dwarf2_per_objfile
->using_index
)
23264 error (_("Cannot use an index to create the index"));
23266 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
23267 error (_("Cannot make an index when the file has multiple .debug_types sections"));
23269 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
23272 if (stat (objfile_name (objfile
), &st
) < 0)
23273 perror_with_name (objfile_name (objfile
));
23275 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile_name (objfile
)),
23276 INDEX_SUFFIX
, (char *) NULL
);
23277 cleanup
= make_cleanup (xfree
, filename
);
23279 out_file
= gdb_fopen_cloexec (filename
, "wb");
23281 error (_("Can't open `%s' for writing"), filename
);
23283 gdb::unlinker
unlink_file (filename
);
23285 symtab
= create_mapped_symtab ();
23286 make_cleanup (cleanup_mapped_symtab
, symtab
);
23288 obstack_init (&addr_obstack
);
23289 make_cleanup_obstack_free (&addr_obstack
);
23291 obstack_init (&cu_list
);
23292 make_cleanup_obstack_free (&cu_list
);
23294 obstack_init (&types_cu_list
);
23295 make_cleanup_obstack_free (&types_cu_list
);
23297 htab_up
psyms_seen (htab_create_alloc (100, htab_hash_pointer
,
23299 NULL
, xcalloc
, xfree
));
23301 /* While we're scanning CU's create a table that maps a psymtab pointer
23302 (which is what addrmap records) to its index (which is what is recorded
23303 in the index file). This will later be needed to write the address
23305 htab_up
cu_index_htab (htab_create_alloc (100,
23306 hash_psymtab_cu_index
,
23307 eq_psymtab_cu_index
,
23308 NULL
, xcalloc
, xfree
));
23309 psymtab_cu_index_map
= XNEWVEC (struct psymtab_cu_index_map
,
23310 dwarf2_per_objfile
->n_comp_units
);
23311 make_cleanup (xfree
, psymtab_cu_index_map
);
23313 /* The CU list is already sorted, so we don't need to do additional
23314 work here. Also, the debug_types entries do not appear in
23315 all_comp_units, but only in their own hash table. */
23316 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
23318 struct dwarf2_per_cu_data
*per_cu
23319 = dwarf2_per_objfile
->all_comp_units
[i
];
23320 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
23322 struct psymtab_cu_index_map
*map
;
23325 /* CU of a shared file from 'dwz -m' may be unused by this main file.
23326 It may be referenced from a local scope but in such case it does not
23327 need to be present in .gdb_index. */
23328 if (psymtab
== NULL
)
23331 if (psymtab
->user
== NULL
)
23332 recursively_write_psymbols (objfile
, psymtab
, symtab
,
23333 psyms_seen
.get (), i
);
23335 map
= &psymtab_cu_index_map
[i
];
23336 map
->psymtab
= psymtab
;
23338 slot
= htab_find_slot (cu_index_htab
.get (), map
, INSERT
);
23339 gdb_assert (slot
!= NULL
);
23340 gdb_assert (*slot
== NULL
);
23343 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23344 per_cu
->offset
.sect_off
);
23345 obstack_grow (&cu_list
, val
, 8);
23346 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
23347 obstack_grow (&cu_list
, val
, 8);
23350 /* Dump the address map. */
23351 write_address_map (objfile
, &addr_obstack
, cu_index_htab
.get ());
23353 /* Write out the .debug_type entries, if any. */
23354 if (dwarf2_per_objfile
->signatured_types
)
23356 struct signatured_type_index_data sig_data
;
23358 sig_data
.objfile
= objfile
;
23359 sig_data
.symtab
= symtab
;
23360 sig_data
.types_list
= &types_cu_list
;
23361 sig_data
.psyms_seen
= psyms_seen
.get ();
23362 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
23363 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
23364 write_one_signatured_type
, &sig_data
);
23367 /* Now that we've processed all symbols we can shrink their cu_indices
23369 uniquify_cu_indices (symtab
);
23371 obstack_init (&constant_pool
);
23372 make_cleanup_obstack_free (&constant_pool
);
23373 obstack_init (&symtab_obstack
);
23374 make_cleanup_obstack_free (&symtab_obstack
);
23375 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
23377 obstack_init (&contents
);
23378 make_cleanup_obstack_free (&contents
);
23379 size_of_contents
= 6 * sizeof (offset_type
);
23380 total_len
= size_of_contents
;
23382 /* The version number. */
23383 val
= MAYBE_SWAP (8);
23384 obstack_grow (&contents
, &val
, sizeof (val
));
23386 /* The offset of the CU list from the start of the file. */
23387 val
= MAYBE_SWAP (total_len
);
23388 obstack_grow (&contents
, &val
, sizeof (val
));
23389 total_len
+= obstack_object_size (&cu_list
);
23391 /* The offset of the types CU list from the start of the file. */
23392 val
= MAYBE_SWAP (total_len
);
23393 obstack_grow (&contents
, &val
, sizeof (val
));
23394 total_len
+= obstack_object_size (&types_cu_list
);
23396 /* The offset of the address table from the start of the file. */
23397 val
= MAYBE_SWAP (total_len
);
23398 obstack_grow (&contents
, &val
, sizeof (val
));
23399 total_len
+= obstack_object_size (&addr_obstack
);
23401 /* The offset of the symbol table from the start of the file. */
23402 val
= MAYBE_SWAP (total_len
);
23403 obstack_grow (&contents
, &val
, sizeof (val
));
23404 total_len
+= obstack_object_size (&symtab_obstack
);
23406 /* The offset of the constant pool from the start of the file. */
23407 val
= MAYBE_SWAP (total_len
);
23408 obstack_grow (&contents
, &val
, sizeof (val
));
23409 total_len
+= obstack_object_size (&constant_pool
);
23411 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
23413 write_obstack (out_file
, &contents
);
23414 write_obstack (out_file
, &cu_list
);
23415 write_obstack (out_file
, &types_cu_list
);
23416 write_obstack (out_file
, &addr_obstack
);
23417 write_obstack (out_file
, &symtab_obstack
);
23418 write_obstack (out_file
, &constant_pool
);
23422 /* We want to keep the file. */
23423 unlink_file
.keep ();
23425 do_cleanups (cleanup
);
23428 /* Implementation of the `save gdb-index' command.
23430 Note that the file format used by this command is documented in the
23431 GDB manual. Any changes here must be documented there. */
23434 save_gdb_index_command (char *arg
, int from_tty
)
23436 struct objfile
*objfile
;
23439 error (_("usage: save gdb-index DIRECTORY"));
23441 ALL_OBJFILES (objfile
)
23445 /* If the objfile does not correspond to an actual file, skip it. */
23446 if (stat (objfile_name (objfile
), &st
) < 0)
23450 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
23451 dwarf2_objfile_data_key
);
23452 if (dwarf2_per_objfile
)
23457 write_psymtabs_to_index (objfile
, arg
);
23459 CATCH (except
, RETURN_MASK_ERROR
)
23461 exception_fprintf (gdb_stderr
, except
,
23462 _("Error while writing index for `%s': "),
23463 objfile_name (objfile
));
23472 int dwarf_always_disassemble
;
23475 show_dwarf_always_disassemble (struct ui_file
*file
, int from_tty
,
23476 struct cmd_list_element
*c
, const char *value
)
23478 fprintf_filtered (file
,
23479 _("Whether to always disassemble "
23480 "DWARF expressions is %s.\n"),
23485 show_check_physname (struct ui_file
*file
, int from_tty
,
23486 struct cmd_list_element
*c
, const char *value
)
23488 fprintf_filtered (file
,
23489 _("Whether to check \"physname\" is %s.\n"),
23493 void _initialize_dwarf2_read (void);
23496 _initialize_dwarf2_read (void)
23498 struct cmd_list_element
*c
;
23500 dwarf2_objfile_data_key
23501 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
23503 add_prefix_cmd ("dwarf", class_maintenance
, set_dwarf_cmd
, _("\
23504 Set DWARF specific variables.\n\
23505 Configure DWARF variables such as the cache size"),
23506 &set_dwarf_cmdlist
, "maintenance set dwarf ",
23507 0/*allow-unknown*/, &maintenance_set_cmdlist
);
23509 add_prefix_cmd ("dwarf", class_maintenance
, show_dwarf_cmd
, _("\
23510 Show DWARF specific variables\n\
23511 Show DWARF variables such as the cache size"),
23512 &show_dwarf_cmdlist
, "maintenance show dwarf ",
23513 0/*allow-unknown*/, &maintenance_show_cmdlist
);
23515 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
23516 &dwarf_max_cache_age
, _("\
23517 Set the upper bound on the age of cached DWARF compilation units."), _("\
23518 Show the upper bound on the age of cached DWARF compilation units."), _("\
23519 A higher limit means that cached compilation units will be stored\n\
23520 in memory longer, and more total memory will be used. Zero disables\n\
23521 caching, which can slow down startup."),
23523 show_dwarf_max_cache_age
,
23524 &set_dwarf_cmdlist
,
23525 &show_dwarf_cmdlist
);
23527 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
23528 &dwarf_always_disassemble
, _("\
23529 Set whether `info address' always disassembles DWARF expressions."), _("\
23530 Show whether `info address' always disassembles DWARF expressions."), _("\
23531 When enabled, DWARF expressions are always printed in an assembly-like\n\
23532 syntax. When disabled, expressions will be printed in a more\n\
23533 conversational style, when possible."),
23535 show_dwarf_always_disassemble
,
23536 &set_dwarf_cmdlist
,
23537 &show_dwarf_cmdlist
);
23539 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
23540 Set debugging of the DWARF reader."), _("\
23541 Show debugging of the DWARF reader."), _("\
23542 When enabled (non-zero), debugging messages are printed during DWARF\n\
23543 reading and symtab expansion. A value of 1 (one) provides basic\n\
23544 information. A value greater than 1 provides more verbose information."),
23547 &setdebuglist
, &showdebuglist
);
23549 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
23550 Set debugging of the DWARF DIE reader."), _("\
23551 Show debugging of the DWARF DIE reader."), _("\
23552 When enabled (non-zero), DIEs are dumped after they are read in.\n\
23553 The value is the maximum depth to print."),
23556 &setdebuglist
, &showdebuglist
);
23558 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
23559 Set debugging of the dwarf line reader."), _("\
23560 Show debugging of the dwarf line reader."), _("\
23561 When enabled (non-zero), line number entries are dumped as they are read in.\n\
23562 A value of 1 (one) provides basic information.\n\
23563 A value greater than 1 provides more verbose information."),
23566 &setdebuglist
, &showdebuglist
);
23568 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
23569 Set cross-checking of \"physname\" code against demangler."), _("\
23570 Show cross-checking of \"physname\" code against demangler."), _("\
23571 When enabled, GDB's internal \"physname\" code is checked against\n\
23573 NULL
, show_check_physname
,
23574 &setdebuglist
, &showdebuglist
);
23576 add_setshow_boolean_cmd ("use-deprecated-index-sections",
23577 no_class
, &use_deprecated_index_sections
, _("\
23578 Set whether to use deprecated gdb_index sections."), _("\
23579 Show whether to use deprecated gdb_index sections."), _("\
23580 When enabled, deprecated .gdb_index sections are used anyway.\n\
23581 Normally they are ignored either because of a missing feature or\n\
23582 performance issue.\n\
23583 Warning: This option must be enabled before gdb reads the file."),
23586 &setlist
, &showlist
);
23588 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
23590 Save a gdb-index file.\n\
23591 Usage: save gdb-index DIRECTORY"),
23593 set_cmd_completer (c
, filename_completer
);
23595 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23596 &dwarf2_locexpr_funcs
);
23597 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23598 &dwarf2_loclist_funcs
);
23600 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23601 &dwarf2_block_frame_base_locexpr_funcs
);
23602 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23603 &dwarf2_block_frame_base_loclist_funcs
);