1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994-2014 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 "exceptions.h"
60 #include "completer.h"
65 #include "gdbcore.h" /* for gnutarget */
66 #include "gdb/gdb-index.h"
71 #include "filestuff.h"
76 #include "gdb_assert.h"
77 #include <sys/types.h>
79 typedef struct symbol
*symbolp
;
82 /* When == 1, print basic high level tracing messages.
83 When > 1, be more verbose.
84 This is in contrast to the low level DIE reading of dwarf2_die_debug. */
85 static unsigned int dwarf2_read_debug
= 0;
87 /* When non-zero, dump DIEs after they are read in. */
88 static unsigned int dwarf2_die_debug
= 0;
90 /* When non-zero, cross-check physname against demangler. */
91 static int check_physname
= 0;
93 /* When non-zero, do not reject deprecated .gdb_index sections. */
94 static int use_deprecated_index_sections
= 0;
96 static const struct objfile_data
*dwarf2_objfile_data_key
;
98 /* The "aclass" indices for various kinds of computed DWARF symbols. */
100 static int dwarf2_locexpr_index
;
101 static int dwarf2_loclist_index
;
102 static int dwarf2_locexpr_block_index
;
103 static int dwarf2_loclist_block_index
;
105 /* A descriptor for dwarf sections.
107 S.ASECTION, SIZE are typically initialized when the objfile is first
108 scanned. BUFFER, READIN are filled in later when the section is read.
109 If the section contained compressed data then SIZE is updated to record
110 the uncompressed size of the section.
112 DWP file format V2 introduces a wrinkle that is easiest to handle by
113 creating the concept of virtual sections contained within a real section.
114 In DWP V2 the sections of the input DWO files are concatenated together
115 into one section, but section offsets are kept relative to the original
117 If this is a virtual dwp-v2 section, S.CONTAINING_SECTION is a backlink to
118 the real section this "virtual" section is contained in, and BUFFER,SIZE
119 describe the virtual section. */
121 struct dwarf2_section_info
125 /* If this is a real section, the bfd section. */
127 /* If this is a virtual section, pointer to the containing ("real")
129 struct dwarf2_section_info
*containing_section
;
131 /* Pointer to section data, only valid if readin. */
132 const gdb_byte
*buffer
;
133 /* The size of the section, real or virtual. */
135 /* If this is a virtual section, the offset in the real section.
136 Only valid if is_virtual. */
137 bfd_size_type virtual_offset
;
138 /* True if we have tried to read this section. */
140 /* True if this is a virtual section, False otherwise.
141 This specifies which of s.asection and s.containing_section to use. */
145 typedef struct dwarf2_section_info dwarf2_section_info_def
;
146 DEF_VEC_O (dwarf2_section_info_def
);
148 /* All offsets in the index are of this type. It must be
149 architecture-independent. */
150 typedef uint32_t offset_type
;
152 DEF_VEC_I (offset_type
);
154 /* Ensure only legit values are used. */
155 #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \
157 gdb_assert ((unsigned int) (value) <= 1); \
158 GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \
161 /* Ensure only legit values are used. */
162 #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \
164 gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \
165 && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \
166 GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \
169 /* Ensure we don't use more than the alloted nuber of bits for the CU. */
170 #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \
172 gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \
173 GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \
176 /* A description of the mapped index. The file format is described in
177 a comment by the code that writes the index. */
180 /* Index data format version. */
183 /* The total length of the buffer. */
186 /* A pointer to the address table data. */
187 const gdb_byte
*address_table
;
189 /* Size of the address table data in bytes. */
190 offset_type address_table_size
;
192 /* The symbol table, implemented as a hash table. */
193 const offset_type
*symbol_table
;
195 /* Size in slots, each slot is 2 offset_types. */
196 offset_type symbol_table_slots
;
198 /* A pointer to the constant pool. */
199 const char *constant_pool
;
202 typedef struct dwarf2_per_cu_data
*dwarf2_per_cu_ptr
;
203 DEF_VEC_P (dwarf2_per_cu_ptr
);
205 /* Collection of data recorded per objfile.
206 This hangs off of dwarf2_objfile_data_key. */
208 struct dwarf2_per_objfile
210 struct dwarf2_section_info info
;
211 struct dwarf2_section_info abbrev
;
212 struct dwarf2_section_info line
;
213 struct dwarf2_section_info loc
;
214 struct dwarf2_section_info macinfo
;
215 struct dwarf2_section_info macro
;
216 struct dwarf2_section_info str
;
217 struct dwarf2_section_info ranges
;
218 struct dwarf2_section_info addr
;
219 struct dwarf2_section_info frame
;
220 struct dwarf2_section_info eh_frame
;
221 struct dwarf2_section_info gdb_index
;
223 VEC (dwarf2_section_info_def
) *types
;
226 struct objfile
*objfile
;
228 /* Table of all the compilation units. This is used to locate
229 the target compilation unit of a particular reference. */
230 struct dwarf2_per_cu_data
**all_comp_units
;
232 /* The number of compilation units in ALL_COMP_UNITS. */
235 /* The number of .debug_types-related CUs. */
238 /* The .debug_types-related CUs (TUs).
239 This is stored in malloc space because we may realloc it. */
240 struct signatured_type
**all_type_units
;
242 /* The number of entries in all_type_unit_groups. */
243 int n_type_unit_groups
;
245 /* Table of type unit groups.
246 This exists to make it easy to iterate over all CUs and TU groups. */
247 struct type_unit_group
**all_type_unit_groups
;
249 /* Table of struct type_unit_group objects.
250 The hash key is the DW_AT_stmt_list value. */
251 htab_t type_unit_groups
;
253 /* A table mapping .debug_types signatures to its signatured_type entry.
254 This is NULL if the .debug_types section hasn't been read in yet. */
255 htab_t signatured_types
;
257 /* Type unit statistics, to see how well the scaling improvements
261 int nr_uniq_abbrev_tables
;
263 int nr_symtab_sharers
;
264 int nr_stmt_less_type_units
;
267 /* A chain of compilation units that are currently read in, so that
268 they can be freed later. */
269 struct dwarf2_per_cu_data
*read_in_chain
;
271 /* A table mapping DW_AT_dwo_name values to struct dwo_file objects.
272 This is NULL if the table hasn't been allocated yet. */
275 /* Non-zero if we've check for whether there is a DWP file. */
278 /* The DWP file if there is one, or NULL. */
279 struct dwp_file
*dwp_file
;
281 /* The shared '.dwz' file, if one exists. This is used when the
282 original data was compressed using 'dwz -m'. */
283 struct dwz_file
*dwz_file
;
285 /* A flag indicating wether this objfile has a section loaded at a
287 int has_section_at_zero
;
289 /* True if we are using the mapped index,
290 or we are faking it for OBJF_READNOW's sake. */
291 unsigned char using_index
;
293 /* The mapped index, or NULL if .gdb_index is missing or not being used. */
294 struct mapped_index
*index_table
;
296 /* When using index_table, this keeps track of all quick_file_names entries.
297 TUs typically share line table entries with a CU, so we maintain a
298 separate table of all line table entries to support the sharing.
299 Note that while there can be way more TUs than CUs, we've already
300 sorted all the TUs into "type unit groups", grouped by their
301 DW_AT_stmt_list value. Therefore the only sharing done here is with a
302 CU and its associated TU group if there is one. */
303 htab_t quick_file_names_table
;
305 /* Set during partial symbol reading, to prevent queueing of full
307 int reading_partial_symbols
;
309 /* Table mapping type DIEs to their struct type *.
310 This is NULL if not allocated yet.
311 The mapping is done via (CU/TU + DIE offset) -> type. */
312 htab_t die_type_hash
;
314 /* The CUs we recently read. */
315 VEC (dwarf2_per_cu_ptr
) *just_read_cus
;
318 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
320 /* Default names of the debugging sections. */
322 /* Note that if the debugging section has been compressed, it might
323 have a name like .zdebug_info. */
325 static const struct dwarf2_debug_sections dwarf2_elf_names
=
327 { ".debug_info", ".zdebug_info" },
328 { ".debug_abbrev", ".zdebug_abbrev" },
329 { ".debug_line", ".zdebug_line" },
330 { ".debug_loc", ".zdebug_loc" },
331 { ".debug_macinfo", ".zdebug_macinfo" },
332 { ".debug_macro", ".zdebug_macro" },
333 { ".debug_str", ".zdebug_str" },
334 { ".debug_ranges", ".zdebug_ranges" },
335 { ".debug_types", ".zdebug_types" },
336 { ".debug_addr", ".zdebug_addr" },
337 { ".debug_frame", ".zdebug_frame" },
338 { ".eh_frame", NULL
},
339 { ".gdb_index", ".zgdb_index" },
343 /* List of DWO/DWP sections. */
345 static const struct dwop_section_names
347 struct dwarf2_section_names abbrev_dwo
;
348 struct dwarf2_section_names info_dwo
;
349 struct dwarf2_section_names line_dwo
;
350 struct dwarf2_section_names loc_dwo
;
351 struct dwarf2_section_names macinfo_dwo
;
352 struct dwarf2_section_names macro_dwo
;
353 struct dwarf2_section_names str_dwo
;
354 struct dwarf2_section_names str_offsets_dwo
;
355 struct dwarf2_section_names types_dwo
;
356 struct dwarf2_section_names cu_index
;
357 struct dwarf2_section_names tu_index
;
361 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
362 { ".debug_info.dwo", ".zdebug_info.dwo" },
363 { ".debug_line.dwo", ".zdebug_line.dwo" },
364 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
365 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
366 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
367 { ".debug_str.dwo", ".zdebug_str.dwo" },
368 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
369 { ".debug_types.dwo", ".zdebug_types.dwo" },
370 { ".debug_cu_index", ".zdebug_cu_index" },
371 { ".debug_tu_index", ".zdebug_tu_index" },
374 /* local data types */
376 /* The data in a compilation unit header, after target2host
377 translation, looks like this. */
378 struct comp_unit_head
382 unsigned char addr_size
;
383 unsigned char signed_addr_p
;
384 sect_offset abbrev_offset
;
386 /* Size of file offsets; either 4 or 8. */
387 unsigned int offset_size
;
389 /* Size of the length field; either 4 or 12. */
390 unsigned int initial_length_size
;
392 /* Offset to the first byte of this compilation unit header in the
393 .debug_info section, for resolving relative reference dies. */
396 /* Offset to first die in this cu from the start of the cu.
397 This will be the first byte following the compilation unit header. */
398 cu_offset first_die_offset
;
401 /* Type used for delaying computation of method physnames.
402 See comments for compute_delayed_physnames. */
403 struct delayed_method_info
405 /* The type to which the method is attached, i.e., its parent class. */
408 /* The index of the method in the type's function fieldlists. */
411 /* The index of the method in the fieldlist. */
414 /* The name of the DIE. */
417 /* The DIE associated with this method. */
418 struct die_info
*die
;
421 typedef struct delayed_method_info delayed_method_info
;
422 DEF_VEC_O (delayed_method_info
);
424 /* Internal state when decoding a particular compilation unit. */
427 /* The objfile containing this compilation unit. */
428 struct objfile
*objfile
;
430 /* The header of the compilation unit. */
431 struct comp_unit_head header
;
433 /* Base address of this compilation unit. */
434 CORE_ADDR base_address
;
436 /* Non-zero if base_address has been set. */
439 /* The language we are debugging. */
440 enum language language
;
441 const struct language_defn
*language_defn
;
443 const char *producer
;
445 /* The generic symbol table building routines have separate lists for
446 file scope symbols and all all other scopes (local scopes). So
447 we need to select the right one to pass to add_symbol_to_list().
448 We do it by keeping a pointer to the correct list in list_in_scope.
450 FIXME: The original dwarf code just treated the file scope as the
451 first local scope, and all other local scopes as nested local
452 scopes, and worked fine. Check to see if we really need to
453 distinguish these in buildsym.c. */
454 struct pending
**list_in_scope
;
456 /* The abbrev table for this CU.
457 Normally this points to the abbrev table in the objfile.
458 But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */
459 struct abbrev_table
*abbrev_table
;
461 /* Hash table holding all the loaded partial DIEs
462 with partial_die->offset.SECT_OFF as hash. */
465 /* Storage for things with the same lifetime as this read-in compilation
466 unit, including partial DIEs. */
467 struct obstack comp_unit_obstack
;
469 /* When multiple dwarf2_cu structures are living in memory, this field
470 chains them all together, so that they can be released efficiently.
471 We will probably also want a generation counter so that most-recently-used
472 compilation units are cached... */
473 struct dwarf2_per_cu_data
*read_in_chain
;
475 /* Backlink to our per_cu entry. */
476 struct dwarf2_per_cu_data
*per_cu
;
478 /* How many compilation units ago was this CU last referenced? */
481 /* A hash table of DIE cu_offset for following references with
482 die_info->offset.sect_off as hash. */
485 /* Full DIEs if read in. */
486 struct die_info
*dies
;
488 /* A set of pointers to dwarf2_per_cu_data objects for compilation
489 units referenced by this one. Only set during full symbol processing;
490 partial symbol tables do not have dependencies. */
493 /* Header data from the line table, during full symbol processing. */
494 struct line_header
*line_header
;
496 /* A list of methods which need to have physnames computed
497 after all type information has been read. */
498 VEC (delayed_method_info
) *method_list
;
500 /* To be copied to symtab->call_site_htab. */
501 htab_t call_site_htab
;
503 /* Non-NULL if this CU came from a DWO file.
504 There is an invariant here that is important to remember:
505 Except for attributes copied from the top level DIE in the "main"
506 (or "stub") file in preparation for reading the DWO file
507 (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
508 Either there isn't a DWO file (in which case this is NULL and the point
509 is moot), or there is and either we're not going to read it (in which
510 case this is NULL) or there is and we are reading it (in which case this
512 struct dwo_unit
*dwo_unit
;
514 /* The DW_AT_addr_base attribute if present, zero otherwise
515 (zero is a valid value though).
516 Note this value comes from the Fission stub CU/TU's DIE. */
519 /* The DW_AT_ranges_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.
522 Also note that the value is zero in the non-DWO case so this value can
523 be used without needing to know whether DWO files are in use or not.
524 N.B. This does not apply to DW_AT_ranges appearing in
525 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
526 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
527 DW_AT_ranges_base *would* have to be applied, and we'd have to care
528 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
529 ULONGEST ranges_base
;
531 /* Mark used when releasing cached dies. */
532 unsigned int mark
: 1;
534 /* This CU references .debug_loc. See the symtab->locations_valid field.
535 This test is imperfect as there may exist optimized debug code not using
536 any location list and still facing inlining issues if handled as
537 unoptimized code. For a future better test see GCC PR other/32998. */
538 unsigned int has_loclist
: 1;
540 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set
541 if all the producer_is_* fields are valid. This information is cached
542 because profiling CU expansion showed excessive time spent in
543 producer_is_gxx_lt_4_6. */
544 unsigned int checked_producer
: 1;
545 unsigned int producer_is_gxx_lt_4_6
: 1;
546 unsigned int producer_is_gcc_lt_4_3
: 1;
547 unsigned int producer_is_icc
: 1;
549 /* When set, the file that we're processing is known to have
550 debugging info for C++ namespaces. GCC 3.3.x did not produce
551 this information, but later versions do. */
553 unsigned int processing_has_namespace_info
: 1;
556 /* Persistent data held for a compilation unit, even when not
557 processing it. We put a pointer to this structure in the
558 read_symtab_private field of the psymtab. */
560 struct dwarf2_per_cu_data
562 /* The start offset and length of this compilation unit.
563 NOTE: Unlike comp_unit_head.length, this length includes
565 If the DIE refers to a DWO file, this is always of the original die,
570 /* Flag indicating this compilation unit will be read in before
571 any of the current compilation units are processed. */
572 unsigned int queued
: 1;
574 /* This flag will be set when reading partial DIEs if we need to load
575 absolutely all DIEs for this compilation unit, instead of just the ones
576 we think are interesting. It gets set if we look for a DIE in the
577 hash table and don't find it. */
578 unsigned int load_all_dies
: 1;
580 /* Non-zero if this CU is from .debug_types.
581 Struct dwarf2_per_cu_data is contained in struct signatured_type iff
583 unsigned int is_debug_types
: 1;
585 /* Non-zero if this CU is from the .dwz file. */
586 unsigned int is_dwz
: 1;
588 /* Non-zero if reading a TU directly from a DWO file, bypassing the stub.
589 This flag is only valid if is_debug_types is true.
590 We can't read a CU directly from a DWO file: There are required
591 attributes in the stub. */
592 unsigned int reading_dwo_directly
: 1;
594 /* Non-zero if the TU has been read.
595 This is used to assist the "Stay in DWO Optimization" for Fission:
596 When reading a DWO, it's faster to read TUs from the DWO instead of
597 fetching them from random other DWOs (due to comdat folding).
598 If the TU has already been read, the optimization is unnecessary
599 (and unwise - we don't want to change where gdb thinks the TU lives
601 This flag is only valid if is_debug_types is true. */
602 unsigned int tu_read
: 1;
604 /* The section this CU/TU lives in.
605 If the DIE refers to a DWO file, this is always the original die,
607 struct dwarf2_section_info
*section
;
609 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
610 of the CU cache it gets reset to NULL again. */
611 struct dwarf2_cu
*cu
;
613 /* The corresponding objfile.
614 Normally we can get the objfile from dwarf2_per_objfile.
615 However we can enter this file with just a "per_cu" handle. */
616 struct objfile
*objfile
;
618 /* When using partial symbol tables, the 'psymtab' field is active.
619 Otherwise the 'quick' field is active. */
622 /* The partial symbol table associated with this compilation unit,
623 or NULL for unread partial units. */
624 struct partial_symtab
*psymtab
;
626 /* Data needed by the "quick" functions. */
627 struct dwarf2_per_cu_quick_data
*quick
;
630 /* The CUs we import using DW_TAG_imported_unit. This is filled in
631 while reading psymtabs, used to compute the psymtab dependencies,
632 and then cleared. Then it is filled in again while reading full
633 symbols, and only deleted when the objfile is destroyed.
635 This is also used to work around a difference between the way gold
636 generates .gdb_index version <=7 and the way gdb does. Arguably this
637 is a gold bug. For symbols coming from TUs, gold records in the index
638 the CU that includes the TU instead of the TU itself. This breaks
639 dw2_lookup_symbol: It assumes that if the index says symbol X lives
640 in CU/TU Y, then one need only expand Y and a subsequent lookup in Y
641 will find X. Alas TUs live in their own symtab, so after expanding CU Y
642 we need to look in TU Z to find X. Fortunately, this is akin to
643 DW_TAG_imported_unit, so we just use the same mechanism: For
644 .gdb_index version <=7 this also records the TUs that the CU referred
645 to. Concurrently with this change gdb was modified to emit version 8
646 indices so we only pay a price for gold generated indices.
647 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
648 VEC (dwarf2_per_cu_ptr
) *imported_symtabs
;
651 /* Entry in the signatured_types hash table. */
653 struct signatured_type
655 /* The "per_cu" object of this type.
656 This struct is used iff per_cu.is_debug_types.
657 N.B.: This is the first member so that it's easy to convert pointers
659 struct dwarf2_per_cu_data per_cu
;
661 /* The type's signature. */
664 /* Offset in the TU of the type's DIE, as read from the TU header.
665 If this TU is a DWO stub and the definition lives in a DWO file
666 (specified by DW_AT_GNU_dwo_name), this value is unusable. */
667 cu_offset type_offset_in_tu
;
669 /* Offset in the section of the type's DIE.
670 If the definition lives in a DWO file, this is the offset in the
671 .debug_types.dwo section.
672 The value is zero until the actual value is known.
673 Zero is otherwise not a valid section offset. */
674 sect_offset type_offset_in_section
;
676 /* Type units are grouped by their DW_AT_stmt_list entry so that they
677 can share them. This points to the containing symtab. */
678 struct type_unit_group
*type_unit_group
;
681 The first time we encounter this type we fully read it in and install it
682 in the symbol tables. Subsequent times we only need the type. */
685 /* Containing DWO unit.
686 This field is valid iff per_cu.reading_dwo_directly. */
687 struct dwo_unit
*dwo_unit
;
690 typedef struct signatured_type
*sig_type_ptr
;
691 DEF_VEC_P (sig_type_ptr
);
693 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
694 This includes type_unit_group and quick_file_names. */
696 struct stmt_list_hash
698 /* The DWO unit this table is from or NULL if there is none. */
699 struct dwo_unit
*dwo_unit
;
701 /* Offset in .debug_line or .debug_line.dwo. */
702 sect_offset line_offset
;
705 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
706 an object of this type. */
708 struct type_unit_group
710 /* dwarf2read.c's main "handle" on a TU symtab.
711 To simplify things we create an artificial CU that "includes" all the
712 type units using this stmt_list so that the rest of the code still has
713 a "per_cu" handle on the symtab.
714 This PER_CU is recognized by having no section. */
715 #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL)
716 struct dwarf2_per_cu_data per_cu
;
718 /* The TUs that share this DW_AT_stmt_list entry.
719 This is added to while parsing type units to build partial symtabs,
720 and is deleted afterwards and not used again. */
721 VEC (sig_type_ptr
) *tus
;
723 /* The primary symtab.
724 Type units in a group needn't all be defined in the same source file,
725 so we create an essentially anonymous symtab as the primary symtab. */
726 struct symtab
*primary_symtab
;
728 /* The data used to construct the hash key. */
729 struct stmt_list_hash hash
;
731 /* The number of symtabs from the line header.
732 The value here must match line_header.num_file_names. */
733 unsigned int num_symtabs
;
735 /* The symbol tables for this TU (obtained from the files listed in
737 WARNING: The order of entries here must match the order of entries
738 in the line header. After the first TU using this type_unit_group, the
739 line header for the subsequent TUs is recreated from this. This is done
740 because we need to use the same symtabs for each TU using the same
741 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
742 there's no guarantee the line header doesn't have duplicate entries. */
743 struct symtab
**symtabs
;
746 /* These sections are what may appear in a (real or virtual) DWO file. */
750 struct dwarf2_section_info abbrev
;
751 struct dwarf2_section_info line
;
752 struct dwarf2_section_info loc
;
753 struct dwarf2_section_info macinfo
;
754 struct dwarf2_section_info macro
;
755 struct dwarf2_section_info str
;
756 struct dwarf2_section_info str_offsets
;
757 /* In the case of a virtual DWO file, these two are unused. */
758 struct dwarf2_section_info info
;
759 VEC (dwarf2_section_info_def
) *types
;
762 /* CUs/TUs in DWP/DWO files. */
766 /* Backlink to the containing struct dwo_file. */
767 struct dwo_file
*dwo_file
;
769 /* The "id" that distinguishes this CU/TU.
770 .debug_info calls this "dwo_id", .debug_types calls this "signature".
771 Since signatures came first, we stick with it for consistency. */
774 /* The section this CU/TU lives in, in the DWO file. */
775 struct dwarf2_section_info
*section
;
777 /* Same as dwarf2_per_cu_data:{offset,length} but in the DWO section. */
781 /* For types, offset in the type's DIE of the type defined by this TU. */
782 cu_offset type_offset_in_tu
;
785 /* include/dwarf2.h defines the DWP section codes.
786 It defines a max value but it doesn't define a min value, which we
787 use for error checking, so provide one. */
789 enum dwp_v2_section_ids
794 /* Data for one DWO file.
796 This includes virtual DWO files (a virtual DWO file is a DWO file as it
797 appears in a DWP file). DWP files don't really have DWO files per se -
798 comdat folding of types "loses" the DWO file they came from, and from
799 a high level view DWP files appear to contain a mass of random types.
800 However, to maintain consistency with the non-DWP case we pretend DWP
801 files contain virtual DWO files, and we assign each TU with one virtual
802 DWO file (generally based on the line and abbrev section offsets -
803 a heuristic that seems to work in practice). */
807 /* The DW_AT_GNU_dwo_name attribute.
808 For virtual DWO files the name is constructed from the section offsets
809 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
810 from related CU+TUs. */
811 const char *dwo_name
;
813 /* The DW_AT_comp_dir attribute. */
814 const char *comp_dir
;
816 /* The bfd, when the file is open. Otherwise this is NULL.
817 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
820 /* The sections that make up this DWO file.
821 Remember that for virtual DWO files in DWP V2, these are virtual
822 sections (for lack of a better name). */
823 struct dwo_sections sections
;
825 /* The CU in the file.
826 We only support one because having more than one requires hacking the
827 dwo_name of each to match, which is highly unlikely to happen.
828 Doing this means all TUs can share comp_dir: We also assume that
829 DW_AT_comp_dir across all TUs in a DWO file will be identical. */
832 /* Table of TUs in the file.
833 Each element is a struct dwo_unit. */
837 /* These sections are what may appear in a DWP file. */
841 /* These are used by both DWP version 1 and 2. */
842 struct dwarf2_section_info str
;
843 struct dwarf2_section_info cu_index
;
844 struct dwarf2_section_info tu_index
;
846 /* These are only used by DWP version 2 files.
847 In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other
848 sections are referenced by section number, and are not recorded here.
849 In DWP version 2 there is at most one copy of all these sections, each
850 section being (effectively) comprised of the concatenation of all of the
851 individual sections that exist in the version 1 format.
852 To keep the code simple we treat each of these concatenated pieces as a
853 section itself (a virtual section?). */
854 struct dwarf2_section_info abbrev
;
855 struct dwarf2_section_info info
;
856 struct dwarf2_section_info line
;
857 struct dwarf2_section_info loc
;
858 struct dwarf2_section_info macinfo
;
859 struct dwarf2_section_info macro
;
860 struct dwarf2_section_info str_offsets
;
861 struct dwarf2_section_info types
;
864 /* These sections are what may appear in a virtual DWO file in DWP version 1.
865 A virtual DWO file is a DWO file as it appears in a DWP file. */
867 struct virtual_v1_dwo_sections
869 struct dwarf2_section_info abbrev
;
870 struct dwarf2_section_info line
;
871 struct dwarf2_section_info loc
;
872 struct dwarf2_section_info macinfo
;
873 struct dwarf2_section_info macro
;
874 struct dwarf2_section_info str_offsets
;
875 /* Each DWP hash table entry records one CU or one TU.
876 That is recorded here, and copied to dwo_unit.section. */
877 struct dwarf2_section_info info_or_types
;
880 /* Similar to virtual_v1_dwo_sections, but for DWP version 2.
881 In version 2, the sections of the DWO files are concatenated together
882 and stored in one section of that name. Thus each ELF section contains
883 several "virtual" sections. */
885 struct virtual_v2_dwo_sections
887 bfd_size_type abbrev_offset
;
888 bfd_size_type abbrev_size
;
890 bfd_size_type line_offset
;
891 bfd_size_type line_size
;
893 bfd_size_type loc_offset
;
894 bfd_size_type loc_size
;
896 bfd_size_type macinfo_offset
;
897 bfd_size_type macinfo_size
;
899 bfd_size_type macro_offset
;
900 bfd_size_type macro_size
;
902 bfd_size_type str_offsets_offset
;
903 bfd_size_type str_offsets_size
;
905 /* Each DWP hash table entry records one CU or one TU.
906 That is recorded here, and copied to dwo_unit.section. */
907 bfd_size_type info_or_types_offset
;
908 bfd_size_type info_or_types_size
;
911 /* Contents of DWP hash tables. */
913 struct dwp_hash_table
915 uint32_t version
, nr_columns
;
916 uint32_t nr_units
, nr_slots
;
917 const gdb_byte
*hash_table
, *unit_table
;
922 const gdb_byte
*indices
;
926 /* This is indexed by column number and gives the id of the section
928 #define MAX_NR_V2_DWO_SECTIONS \
929 (1 /* .debug_info or .debug_types */ \
930 + 1 /* .debug_abbrev */ \
931 + 1 /* .debug_line */ \
932 + 1 /* .debug_loc */ \
933 + 1 /* .debug_str_offsets */ \
934 + 1 /* .debug_macro or .debug_macinfo */)
935 int section_ids
[MAX_NR_V2_DWO_SECTIONS
];
936 const gdb_byte
*offsets
;
937 const gdb_byte
*sizes
;
942 /* Data for one DWP file. */
946 /* Name of the file. */
949 /* File format version. */
955 /* Section info for this file. */
956 struct dwp_sections sections
;
958 /* Table of CUs in the file. */
959 const struct dwp_hash_table
*cus
;
961 /* Table of TUs in the file. */
962 const struct dwp_hash_table
*tus
;
964 /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
968 /* Table to map ELF section numbers to their sections.
969 This is only needed for the DWP V1 file format. */
970 unsigned int num_sections
;
971 asection
**elf_sections
;
974 /* This represents a '.dwz' file. */
978 /* A dwz file can only contain a few sections. */
979 struct dwarf2_section_info abbrev
;
980 struct dwarf2_section_info info
;
981 struct dwarf2_section_info str
;
982 struct dwarf2_section_info line
;
983 struct dwarf2_section_info macro
;
984 struct dwarf2_section_info gdb_index
;
990 /* Struct used to pass misc. parameters to read_die_and_children, et
991 al. which are used for both .debug_info and .debug_types dies.
992 All parameters here are unchanging for the life of the call. This
993 struct exists to abstract away the constant parameters of die reading. */
995 struct die_reader_specs
997 /* The bfd of die_section. */
1000 /* The CU of the DIE we are parsing. */
1001 struct dwarf2_cu
*cu
;
1003 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
1004 struct dwo_file
*dwo_file
;
1006 /* The section the die comes from.
1007 This is either .debug_info or .debug_types, or the .dwo variants. */
1008 struct dwarf2_section_info
*die_section
;
1010 /* die_section->buffer. */
1011 const gdb_byte
*buffer
;
1013 /* The end of the buffer. */
1014 const gdb_byte
*buffer_end
;
1016 /* The value of the DW_AT_comp_dir attribute. */
1017 const char *comp_dir
;
1020 /* Type of function passed to init_cutu_and_read_dies, et.al. */
1021 typedef void (die_reader_func_ftype
) (const struct die_reader_specs
*reader
,
1022 const gdb_byte
*info_ptr
,
1023 struct die_info
*comp_unit_die
,
1027 /* The line number information for a compilation unit (found in the
1028 .debug_line section) begins with a "statement program header",
1029 which contains the following information. */
1032 unsigned int total_length
;
1033 unsigned short version
;
1034 unsigned int header_length
;
1035 unsigned char minimum_instruction_length
;
1036 unsigned char maximum_ops_per_instruction
;
1037 unsigned char default_is_stmt
;
1039 unsigned char line_range
;
1040 unsigned char opcode_base
;
1042 /* standard_opcode_lengths[i] is the number of operands for the
1043 standard opcode whose value is i. This means that
1044 standard_opcode_lengths[0] is unused, and the last meaningful
1045 element is standard_opcode_lengths[opcode_base - 1]. */
1046 unsigned char *standard_opcode_lengths
;
1048 /* The include_directories table. NOTE! These strings are not
1049 allocated with xmalloc; instead, they are pointers into
1050 debug_line_buffer. If you try to free them, `free' will get
1052 unsigned int num_include_dirs
, include_dirs_size
;
1053 const char **include_dirs
;
1055 /* The file_names table. NOTE! These strings are not allocated
1056 with xmalloc; instead, they are pointers into debug_line_buffer.
1057 Don't try to free them directly. */
1058 unsigned int num_file_names
, file_names_size
;
1062 unsigned int dir_index
;
1063 unsigned int mod_time
;
1064 unsigned int length
;
1065 int included_p
; /* Non-zero if referenced by the Line Number Program. */
1066 struct symtab
*symtab
; /* The associated symbol table, if any. */
1069 /* The start and end of the statement program following this
1070 header. These point into dwarf2_per_objfile->line_buffer. */
1071 const gdb_byte
*statement_program_start
, *statement_program_end
;
1074 /* When we construct a partial symbol table entry we only
1075 need this much information. */
1076 struct partial_die_info
1078 /* Offset of this DIE. */
1081 /* DWARF-2 tag for this DIE. */
1082 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1084 /* Assorted flags describing the data found in this DIE. */
1085 unsigned int has_children
: 1;
1086 unsigned int is_external
: 1;
1087 unsigned int is_declaration
: 1;
1088 unsigned int has_type
: 1;
1089 unsigned int has_specification
: 1;
1090 unsigned int has_pc_info
: 1;
1091 unsigned int may_be_inlined
: 1;
1093 /* Flag set if the SCOPE field of this structure has been
1095 unsigned int scope_set
: 1;
1097 /* Flag set if the DIE has a byte_size attribute. */
1098 unsigned int has_byte_size
: 1;
1100 /* Flag set if any of the DIE's children are template arguments. */
1101 unsigned int has_template_arguments
: 1;
1103 /* Flag set if fixup_partial_die has been called on this die. */
1104 unsigned int fixup_called
: 1;
1106 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
1107 unsigned int is_dwz
: 1;
1109 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
1110 unsigned int spec_is_dwz
: 1;
1112 /* The name of this DIE. Normally the value of DW_AT_name, but
1113 sometimes a default name for unnamed DIEs. */
1116 /* The linkage name, if present. */
1117 const char *linkage_name
;
1119 /* The scope to prepend to our children. This is generally
1120 allocated on the comp_unit_obstack, so will disappear
1121 when this compilation unit leaves the cache. */
1124 /* Some data associated with the partial DIE. The tag determines
1125 which field is live. */
1128 /* The location description associated with this DIE, if any. */
1129 struct dwarf_block
*locdesc
;
1130 /* The offset of an import, for DW_TAG_imported_unit. */
1134 /* If HAS_PC_INFO, the PC range associated with this DIE. */
1138 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
1139 DW_AT_sibling, if any. */
1140 /* NOTE: This member isn't strictly necessary, read_partial_die could
1141 return DW_AT_sibling values to its caller load_partial_dies. */
1142 const gdb_byte
*sibling
;
1144 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
1145 DW_AT_specification (or DW_AT_abstract_origin or
1146 DW_AT_extension). */
1147 sect_offset spec_offset
;
1149 /* Pointers to this DIE's parent, first child, and next sibling,
1151 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
1154 /* This data structure holds the information of an abbrev. */
1157 unsigned int number
; /* number identifying abbrev */
1158 enum dwarf_tag tag
; /* dwarf tag */
1159 unsigned short has_children
; /* boolean */
1160 unsigned short num_attrs
; /* number of attributes */
1161 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
1162 struct abbrev_info
*next
; /* next in chain */
1167 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1168 ENUM_BITFIELD(dwarf_form
) form
: 16;
1171 /* Size of abbrev_table.abbrev_hash_table. */
1172 #define ABBREV_HASH_SIZE 121
1174 /* Top level data structure to contain an abbreviation table. */
1178 /* Where the abbrev table came from.
1179 This is used as a sanity check when the table is used. */
1182 /* Storage for the abbrev table. */
1183 struct obstack abbrev_obstack
;
1185 /* Hash table of abbrevs.
1186 This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
1187 It could be statically allocated, but the previous code didn't so we
1189 struct abbrev_info
**abbrevs
;
1192 /* Attributes have a name and a value. */
1195 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1196 ENUM_BITFIELD(dwarf_form
) form
: 15;
1198 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
1199 field should be in u.str (existing only for DW_STRING) but it is kept
1200 here for better struct attribute alignment. */
1201 unsigned int string_is_canonical
: 1;
1206 struct dwarf_block
*blk
;
1215 /* This data structure holds a complete die structure. */
1218 /* DWARF-2 tag for this DIE. */
1219 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1221 /* Number of attributes */
1222 unsigned char num_attrs
;
1224 /* True if we're presently building the full type name for the
1225 type derived from this DIE. */
1226 unsigned char building_fullname
: 1;
1228 /* True if this die is in process. PR 16581. */
1229 unsigned char in_process
: 1;
1232 unsigned int abbrev
;
1234 /* Offset in .debug_info or .debug_types section. */
1237 /* The dies in a compilation unit form an n-ary tree. PARENT
1238 points to this die's parent; CHILD points to the first child of
1239 this node; and all the children of a given node are chained
1240 together via their SIBLING fields. */
1241 struct die_info
*child
; /* Its first child, if any. */
1242 struct die_info
*sibling
; /* Its next sibling, if any. */
1243 struct die_info
*parent
; /* Its parent, if any. */
1245 /* An array of attributes, with NUM_ATTRS elements. There may be
1246 zero, but it's not common and zero-sized arrays are not
1247 sufficiently portable C. */
1248 struct attribute attrs
[1];
1251 /* Get at parts of an attribute structure. */
1253 #define DW_STRING(attr) ((attr)->u.str)
1254 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
1255 #define DW_UNSND(attr) ((attr)->u.unsnd)
1256 #define DW_BLOCK(attr) ((attr)->u.blk)
1257 #define DW_SND(attr) ((attr)->u.snd)
1258 #define DW_ADDR(attr) ((attr)->u.addr)
1259 #define DW_SIGNATURE(attr) ((attr)->u.signature)
1261 /* Blocks are a bunch of untyped bytes. */
1266 /* Valid only if SIZE is not zero. */
1267 const gdb_byte
*data
;
1270 #ifndef ATTR_ALLOC_CHUNK
1271 #define ATTR_ALLOC_CHUNK 4
1274 /* Allocate fields for structs, unions and enums in this size. */
1275 #ifndef DW_FIELD_ALLOC_CHUNK
1276 #define DW_FIELD_ALLOC_CHUNK 4
1279 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1280 but this would require a corresponding change in unpack_field_as_long
1282 static int bits_per_byte
= 8;
1284 /* The routines that read and process dies for a C struct or C++ class
1285 pass lists of data member fields and lists of member function fields
1286 in an instance of a field_info structure, as defined below. */
1289 /* List of data member and baseclasses fields. */
1292 struct nextfield
*next
;
1297 *fields
, *baseclasses
;
1299 /* Number of fields (including baseclasses). */
1302 /* Number of baseclasses. */
1305 /* Set if the accesibility of one of the fields is not public. */
1306 int non_public_fields
;
1308 /* Member function fields array, entries are allocated in the order they
1309 are encountered in the object file. */
1312 struct nextfnfield
*next
;
1313 struct fn_field fnfield
;
1317 /* Member function fieldlist array, contains name of possibly overloaded
1318 member function, number of overloaded member functions and a pointer
1319 to the head of the member function field chain. */
1324 struct nextfnfield
*head
;
1328 /* Number of entries in the fnfieldlists array. */
1331 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1332 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1333 struct typedef_field_list
1335 struct typedef_field field
;
1336 struct typedef_field_list
*next
;
1338 *typedef_field_list
;
1339 unsigned typedef_field_list_count
;
1342 /* One item on the queue of compilation units to read in full symbols
1344 struct dwarf2_queue_item
1346 struct dwarf2_per_cu_data
*per_cu
;
1347 enum language pretend_language
;
1348 struct dwarf2_queue_item
*next
;
1351 /* The current queue. */
1352 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
1354 /* Loaded secondary compilation units are kept in memory until they
1355 have not been referenced for the processing of this many
1356 compilation units. Set this to zero to disable caching. Cache
1357 sizes of up to at least twenty will improve startup time for
1358 typical inter-CU-reference binaries, at an obvious memory cost. */
1359 static int dwarf2_max_cache_age
= 5;
1361 show_dwarf2_max_cache_age (struct ui_file
*file
, int from_tty
,
1362 struct cmd_list_element
*c
, const char *value
)
1364 fprintf_filtered (file
, _("The upper bound on the age of cached "
1365 "dwarf2 compilation units is %s.\n"),
1369 /* local function prototypes */
1371 static const char *get_section_name (const struct dwarf2_section_info
*);
1373 static const char *get_section_file_name (const struct dwarf2_section_info
*);
1375 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
1377 static void dwarf2_find_base_address (struct die_info
*die
,
1378 struct dwarf2_cu
*cu
);
1380 static struct partial_symtab
*create_partial_symtab
1381 (struct dwarf2_per_cu_data
*per_cu
, const char *name
);
1383 static void dwarf2_build_psymtabs_hard (struct objfile
*);
1385 static void scan_partial_symbols (struct partial_die_info
*,
1386 CORE_ADDR
*, CORE_ADDR
*,
1387 int, struct dwarf2_cu
*);
1389 static void add_partial_symbol (struct partial_die_info
*,
1390 struct dwarf2_cu
*);
1392 static void add_partial_namespace (struct partial_die_info
*pdi
,
1393 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1394 int need_pc
, struct dwarf2_cu
*cu
);
1396 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1397 CORE_ADDR
*highpc
, int need_pc
,
1398 struct dwarf2_cu
*cu
);
1400 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1401 struct dwarf2_cu
*cu
);
1403 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1404 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1405 int need_pc
, struct dwarf2_cu
*cu
);
1407 static void dwarf2_read_symtab (struct partial_symtab
*,
1410 static void psymtab_to_symtab_1 (struct partial_symtab
*);
1412 static struct abbrev_info
*abbrev_table_lookup_abbrev
1413 (const struct abbrev_table
*, unsigned int);
1415 static struct abbrev_table
*abbrev_table_read_table
1416 (struct dwarf2_section_info
*, sect_offset
);
1418 static void abbrev_table_free (struct abbrev_table
*);
1420 static void abbrev_table_free_cleanup (void *);
1422 static void dwarf2_read_abbrevs (struct dwarf2_cu
*,
1423 struct dwarf2_section_info
*);
1425 static void dwarf2_free_abbrev_table (void *);
1427 static unsigned int peek_abbrev_code (bfd
*, const gdb_byte
*);
1429 static struct partial_die_info
*load_partial_dies
1430 (const struct die_reader_specs
*, const gdb_byte
*, int);
1432 static const gdb_byte
*read_partial_die (const struct die_reader_specs
*,
1433 struct partial_die_info
*,
1434 struct abbrev_info
*,
1438 static struct partial_die_info
*find_partial_die (sect_offset
, int,
1439 struct dwarf2_cu
*);
1441 static void fixup_partial_die (struct partial_die_info
*,
1442 struct dwarf2_cu
*);
1444 static const gdb_byte
*read_attribute (const struct die_reader_specs
*,
1445 struct attribute
*, struct attr_abbrev
*,
1448 static unsigned int read_1_byte (bfd
*, const gdb_byte
*);
1450 static int read_1_signed_byte (bfd
*, const gdb_byte
*);
1452 static unsigned int read_2_bytes (bfd
*, const gdb_byte
*);
1454 static unsigned int read_4_bytes (bfd
*, const gdb_byte
*);
1456 static ULONGEST
read_8_bytes (bfd
*, const gdb_byte
*);
1458 static CORE_ADDR
read_address (bfd
*, const gdb_byte
*ptr
, struct dwarf2_cu
*,
1461 static LONGEST
read_initial_length (bfd
*, const gdb_byte
*, unsigned int *);
1463 static LONGEST read_checked_initial_length_and_offset
1464 (bfd
*, const gdb_byte
*, const struct comp_unit_head
*,
1465 unsigned int *, unsigned int *);
1467 static LONGEST
read_offset (bfd
*, const gdb_byte
*,
1468 const struct comp_unit_head
*,
1471 static LONGEST
read_offset_1 (bfd
*, const gdb_byte
*, unsigned int);
1473 static sect_offset
read_abbrev_offset (struct dwarf2_section_info
*,
1476 static const gdb_byte
*read_n_bytes (bfd
*, const gdb_byte
*, unsigned int);
1478 static const char *read_direct_string (bfd
*, const gdb_byte
*, unsigned int *);
1480 static const char *read_indirect_string (bfd
*, const gdb_byte
*,
1481 const struct comp_unit_head
*,
1484 static const char *read_indirect_string_from_dwz (struct dwz_file
*, LONGEST
);
1486 static ULONGEST
read_unsigned_leb128 (bfd
*, const gdb_byte
*, unsigned int *);
1488 static LONGEST
read_signed_leb128 (bfd
*, const gdb_byte
*, unsigned int *);
1490 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*,
1494 static const char *read_str_index (const struct die_reader_specs
*reader
,
1495 ULONGEST str_index
);
1497 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1499 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1500 struct dwarf2_cu
*);
1502 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
1505 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1506 struct dwarf2_cu
*cu
);
1508 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1510 static struct die_info
*die_specification (struct die_info
*die
,
1511 struct dwarf2_cu
**);
1513 static void free_line_header (struct line_header
*lh
);
1515 static struct line_header
*dwarf_decode_line_header (unsigned int offset
,
1516 struct dwarf2_cu
*cu
);
1518 static void dwarf_decode_lines (struct line_header
*, const char *,
1519 struct dwarf2_cu
*, struct partial_symtab
*,
1522 static void dwarf2_start_subfile (const char *, const char *, const char *);
1524 static void dwarf2_start_symtab (struct dwarf2_cu
*,
1525 const char *, const char *, CORE_ADDR
);
1527 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1528 struct dwarf2_cu
*);
1530 static struct symbol
*new_symbol_full (struct die_info
*, struct type
*,
1531 struct dwarf2_cu
*, struct symbol
*);
1533 static void dwarf2_const_value (const struct attribute
*, struct symbol
*,
1534 struct dwarf2_cu
*);
1536 static void dwarf2_const_value_attr (const struct attribute
*attr
,
1539 struct obstack
*obstack
,
1540 struct dwarf2_cu
*cu
, LONGEST
*value
,
1541 const gdb_byte
**bytes
,
1542 struct dwarf2_locexpr_baton
**baton
);
1544 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1546 static int need_gnat_info (struct dwarf2_cu
*);
1548 static struct type
*die_descriptive_type (struct die_info
*,
1549 struct dwarf2_cu
*);
1551 static void set_descriptive_type (struct type
*, struct die_info
*,
1552 struct dwarf2_cu
*);
1554 static struct type
*die_containing_type (struct die_info
*,
1555 struct dwarf2_cu
*);
1557 static struct type
*lookup_die_type (struct die_info
*, const struct attribute
*,
1558 struct dwarf2_cu
*);
1560 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1562 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1564 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1566 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1567 const char *suffix
, int physname
,
1568 struct dwarf2_cu
*cu
);
1570 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1572 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1574 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1576 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1578 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1580 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1581 struct dwarf2_cu
*, struct partial_symtab
*);
1583 static int dwarf2_get_pc_bounds (struct die_info
*,
1584 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*,
1585 struct partial_symtab
*);
1587 static void get_scope_pc_bounds (struct die_info
*,
1588 CORE_ADDR
*, CORE_ADDR
*,
1589 struct dwarf2_cu
*);
1591 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1592 CORE_ADDR
, struct dwarf2_cu
*);
1594 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1595 struct dwarf2_cu
*);
1597 static void dwarf2_attach_fields_to_type (struct field_info
*,
1598 struct type
*, struct dwarf2_cu
*);
1600 static void dwarf2_add_member_fn (struct field_info
*,
1601 struct die_info
*, struct type
*,
1602 struct dwarf2_cu
*);
1604 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1606 struct dwarf2_cu
*);
1608 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1610 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1612 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1614 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1616 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1618 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1620 static struct type
*read_module_type (struct die_info
*die
,
1621 struct dwarf2_cu
*cu
);
1623 static const char *namespace_name (struct die_info
*die
,
1624 int *is_anonymous
, struct dwarf2_cu
*);
1626 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1628 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1630 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1631 struct dwarf2_cu
*);
1633 static struct die_info
*read_die_and_siblings_1
1634 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1637 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1638 const gdb_byte
*info_ptr
,
1639 const gdb_byte
**new_info_ptr
,
1640 struct die_info
*parent
);
1642 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1643 struct die_info
**, const gdb_byte
*,
1646 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1647 struct die_info
**, const gdb_byte
*,
1650 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1652 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1655 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1657 static const char *dwarf2_full_name (const char *name
,
1658 struct die_info
*die
,
1659 struct dwarf2_cu
*cu
);
1661 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1662 struct dwarf2_cu
*cu
);
1664 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1665 struct dwarf2_cu
**);
1667 static const char *dwarf_tag_name (unsigned int);
1669 static const char *dwarf_attr_name (unsigned int);
1671 static const char *dwarf_form_name (unsigned int);
1673 static char *dwarf_bool_name (unsigned int);
1675 static const char *dwarf_type_encoding_name (unsigned int);
1677 static struct die_info
*sibling_die (struct die_info
*);
1679 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1681 static void dump_die_for_error (struct die_info
*);
1683 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1686 /*static*/ void dump_die (struct die_info
*, int max_level
);
1688 static void store_in_ref_table (struct die_info
*,
1689 struct dwarf2_cu
*);
1691 static sect_offset
dwarf2_get_ref_die_offset (const struct attribute
*);
1693 static LONGEST
dwarf2_get_attr_constant_value (const struct attribute
*, int);
1695 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1696 const struct attribute
*,
1697 struct dwarf2_cu
**);
1699 static struct die_info
*follow_die_ref (struct die_info
*,
1700 const struct attribute
*,
1701 struct dwarf2_cu
**);
1703 static struct die_info
*follow_die_sig (struct die_info
*,
1704 const struct attribute
*,
1705 struct dwarf2_cu
**);
1707 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1708 struct dwarf2_cu
*);
1710 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1711 const struct attribute
*,
1712 struct dwarf2_cu
*);
1714 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1716 static void read_signatured_type (struct signatured_type
*);
1718 static struct type_unit_group
*get_type_unit_group
1719 (struct dwarf2_cu
*, const struct attribute
*);
1721 static void build_type_unit_groups (die_reader_func_ftype
*, void *);
1723 /* memory allocation interface */
1725 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1727 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1729 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int,
1732 static int attr_form_is_block (const struct attribute
*);
1734 static int attr_form_is_section_offset (const struct attribute
*);
1736 static int attr_form_is_constant (const struct attribute
*);
1738 static int attr_form_is_ref (const struct attribute
*);
1740 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1741 struct dwarf2_loclist_baton
*baton
,
1742 const struct attribute
*attr
);
1744 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1746 struct dwarf2_cu
*cu
,
1749 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1750 const gdb_byte
*info_ptr
,
1751 struct abbrev_info
*abbrev
);
1753 static void free_stack_comp_unit (void *);
1755 static hashval_t
partial_die_hash (const void *item
);
1757 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1759 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1760 (sect_offset offset
, unsigned int offset_in_dwz
, struct objfile
*objfile
);
1762 static void init_one_comp_unit (struct dwarf2_cu
*cu
,
1763 struct dwarf2_per_cu_data
*per_cu
);
1765 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1766 struct die_info
*comp_unit_die
,
1767 enum language pretend_language
);
1769 static void free_heap_comp_unit (void *);
1771 static void free_cached_comp_units (void *);
1773 static void age_cached_comp_units (void);
1775 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1777 static struct type
*set_die_type (struct die_info
*, struct type
*,
1778 struct dwarf2_cu
*);
1780 static void create_all_comp_units (struct objfile
*);
1782 static int create_all_type_units (struct objfile
*);
1784 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1787 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1790 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1793 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1794 struct dwarf2_per_cu_data
*);
1796 static void dwarf2_mark (struct dwarf2_cu
*);
1798 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1800 static struct type
*get_die_type_at_offset (sect_offset
,
1801 struct dwarf2_per_cu_data
*);
1803 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1805 static void dwarf2_release_queue (void *dummy
);
1807 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1808 enum language pretend_language
);
1810 static void process_queue (void);
1812 static void find_file_and_directory (struct die_info
*die
,
1813 struct dwarf2_cu
*cu
,
1814 const char **name
, const char **comp_dir
);
1816 static char *file_full_name (int file
, struct line_header
*lh
,
1817 const char *comp_dir
);
1819 static const gdb_byte
*read_and_check_comp_unit_head
1820 (struct comp_unit_head
*header
,
1821 struct dwarf2_section_info
*section
,
1822 struct dwarf2_section_info
*abbrev_section
, const gdb_byte
*info_ptr
,
1823 int is_debug_types_section
);
1825 static void init_cutu_and_read_dies
1826 (struct dwarf2_per_cu_data
*this_cu
, struct abbrev_table
*abbrev_table
,
1827 int use_existing_cu
, int keep
,
1828 die_reader_func_ftype
*die_reader_func
, void *data
);
1830 static void init_cutu_and_read_dies_simple
1831 (struct dwarf2_per_cu_data
*this_cu
,
1832 die_reader_func_ftype
*die_reader_func
, void *data
);
1834 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1836 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
1838 static struct dwo_unit
*lookup_dwo_unit_in_dwp
1839 (struct dwp_file
*dwp_file
, const char *comp_dir
,
1840 ULONGEST signature
, int is_debug_types
);
1842 static struct dwp_file
*get_dwp_file (void);
1844 static struct dwo_unit
*lookup_dwo_comp_unit
1845 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
1847 static struct dwo_unit
*lookup_dwo_type_unit
1848 (struct signatured_type
*, const char *, const char *);
1850 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
1852 static void free_dwo_file_cleanup (void *);
1854 static void process_cu_includes (void);
1856 static void check_producer (struct dwarf2_cu
*cu
);
1858 /* Various complaints about symbol reading that don't abort the process. */
1861 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
1863 complaint (&symfile_complaints
,
1864 _("statement list doesn't fit in .debug_line section"));
1868 dwarf2_debug_line_missing_file_complaint (void)
1870 complaint (&symfile_complaints
,
1871 _(".debug_line section has line data without a file"));
1875 dwarf2_debug_line_missing_end_sequence_complaint (void)
1877 complaint (&symfile_complaints
,
1878 _(".debug_line section has line "
1879 "program sequence without an end"));
1883 dwarf2_complex_location_expr_complaint (void)
1885 complaint (&symfile_complaints
, _("location expression too complex"));
1889 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
1892 complaint (&symfile_complaints
,
1893 _("const value length mismatch for '%s', got %d, expected %d"),
1898 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
1900 complaint (&symfile_complaints
,
1901 _("debug info runs off end of %s section"
1903 get_section_name (section
),
1904 get_section_file_name (section
));
1908 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
1910 complaint (&symfile_complaints
,
1911 _("macro debug info contains a "
1912 "malformed macro definition:\n`%s'"),
1917 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
1919 complaint (&symfile_complaints
,
1920 _("invalid attribute class or form for '%s' in '%s'"),
1926 /* Convert VALUE between big- and little-endian. */
1928 byte_swap (offset_type value
)
1932 result
= (value
& 0xff) << 24;
1933 result
|= (value
& 0xff00) << 8;
1934 result
|= (value
& 0xff0000) >> 8;
1935 result
|= (value
& 0xff000000) >> 24;
1939 #define MAYBE_SWAP(V) byte_swap (V)
1942 #define MAYBE_SWAP(V) (V)
1943 #endif /* WORDS_BIGENDIAN */
1945 /* Read the given attribute value as an address, taking the attribute's
1946 form into account. */
1949 attr_value_as_address (struct attribute
*attr
)
1953 if (attr
->form
!= DW_FORM_addr
&& attr
->form
!= DW_FORM_GNU_addr_index
)
1955 /* Aside from a few clearly defined exceptions, attributes that
1956 contain an address must always be in DW_FORM_addr form.
1957 Unfortunately, some compilers happen to be violating this
1958 requirement by encoding addresses using other forms, such
1959 as DW_FORM_data4 for example. For those broken compilers,
1960 we try to do our best, without any guarantee of success,
1961 to interpret the address correctly. It would also be nice
1962 to generate a complaint, but that would require us to maintain
1963 a list of legitimate cases where a non-address form is allowed,
1964 as well as update callers to pass in at least the CU's DWARF
1965 version. This is more overhead than what we're willing to
1966 expand for a pretty rare case. */
1967 addr
= DW_UNSND (attr
);
1970 addr
= DW_ADDR (attr
);
1975 /* The suffix for an index file. */
1976 #define INDEX_SUFFIX ".gdb-index"
1978 /* Try to locate the sections we need for DWARF 2 debugging
1979 information and return true if we have enough to do something.
1980 NAMES points to the dwarf2 section names, or is NULL if the standard
1981 ELF names are used. */
1984 dwarf2_has_info (struct objfile
*objfile
,
1985 const struct dwarf2_debug_sections
*names
)
1987 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
1988 if (!dwarf2_per_objfile
)
1990 /* Initialize per-objfile state. */
1991 struct dwarf2_per_objfile
*data
1992 = obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
1994 memset (data
, 0, sizeof (*data
));
1995 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
1996 dwarf2_per_objfile
= data
;
1998 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
,
2000 dwarf2_per_objfile
->objfile
= objfile
;
2002 return (!dwarf2_per_objfile
->info
.is_virtual
2003 && dwarf2_per_objfile
->info
.s
.asection
!= NULL
2004 && !dwarf2_per_objfile
->abbrev
.is_virtual
2005 && dwarf2_per_objfile
->abbrev
.s
.asection
!= NULL
);
2008 /* Return the containing section of virtual section SECTION. */
2010 static struct dwarf2_section_info
*
2011 get_containing_section (const struct dwarf2_section_info
*section
)
2013 gdb_assert (section
->is_virtual
);
2014 return section
->s
.containing_section
;
2017 /* Return the bfd owner of SECTION. */
2020 get_section_bfd_owner (const struct dwarf2_section_info
*section
)
2022 if (section
->is_virtual
)
2024 section
= get_containing_section (section
);
2025 gdb_assert (!section
->is_virtual
);
2027 return section
->s
.asection
->owner
;
2030 /* Return the bfd section of SECTION.
2031 Returns NULL if the section is not present. */
2034 get_section_bfd_section (const struct dwarf2_section_info
*section
)
2036 if (section
->is_virtual
)
2038 section
= get_containing_section (section
);
2039 gdb_assert (!section
->is_virtual
);
2041 return section
->s
.asection
;
2044 /* Return the name of SECTION. */
2047 get_section_name (const struct dwarf2_section_info
*section
)
2049 asection
*sectp
= get_section_bfd_section (section
);
2051 gdb_assert (sectp
!= NULL
);
2052 return bfd_section_name (get_section_bfd_owner (section
), sectp
);
2055 /* Return the name of the file SECTION is in. */
2058 get_section_file_name (const struct dwarf2_section_info
*section
)
2060 bfd
*abfd
= get_section_bfd_owner (section
);
2062 return bfd_get_filename (abfd
);
2065 /* Return the id of SECTION.
2066 Returns 0 if SECTION doesn't exist. */
2069 get_section_id (const struct dwarf2_section_info
*section
)
2071 asection
*sectp
= get_section_bfd_section (section
);
2078 /* Return the flags of SECTION.
2079 SECTION (or containing section if this is a virtual section) must exist. */
2082 get_section_flags (const struct dwarf2_section_info
*section
)
2084 asection
*sectp
= get_section_bfd_section (section
);
2086 gdb_assert (sectp
!= NULL
);
2087 return bfd_get_section_flags (sectp
->owner
, sectp
);
2090 /* When loading sections, we look either for uncompressed section or for
2091 compressed section names. */
2094 section_is_p (const char *section_name
,
2095 const struct dwarf2_section_names
*names
)
2097 if (names
->normal
!= NULL
2098 && strcmp (section_name
, names
->normal
) == 0)
2100 if (names
->compressed
!= NULL
2101 && strcmp (section_name
, names
->compressed
) == 0)
2106 /* This function is mapped across the sections and remembers the
2107 offset and size of each of the debugging sections we are interested
2111 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *vnames
)
2113 const struct dwarf2_debug_sections
*names
;
2114 flagword aflag
= bfd_get_section_flags (abfd
, sectp
);
2117 names
= &dwarf2_elf_names
;
2119 names
= (const struct dwarf2_debug_sections
*) vnames
;
2121 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
2124 else if (section_is_p (sectp
->name
, &names
->info
))
2126 dwarf2_per_objfile
->info
.s
.asection
= sectp
;
2127 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
2129 else if (section_is_p (sectp
->name
, &names
->abbrev
))
2131 dwarf2_per_objfile
->abbrev
.s
.asection
= sectp
;
2132 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
2134 else if (section_is_p (sectp
->name
, &names
->line
))
2136 dwarf2_per_objfile
->line
.s
.asection
= sectp
;
2137 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
2139 else if (section_is_p (sectp
->name
, &names
->loc
))
2141 dwarf2_per_objfile
->loc
.s
.asection
= sectp
;
2142 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
2144 else if (section_is_p (sectp
->name
, &names
->macinfo
))
2146 dwarf2_per_objfile
->macinfo
.s
.asection
= sectp
;
2147 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
2149 else if (section_is_p (sectp
->name
, &names
->macro
))
2151 dwarf2_per_objfile
->macro
.s
.asection
= sectp
;
2152 dwarf2_per_objfile
->macro
.size
= bfd_get_section_size (sectp
);
2154 else if (section_is_p (sectp
->name
, &names
->str
))
2156 dwarf2_per_objfile
->str
.s
.asection
= sectp
;
2157 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
2159 else if (section_is_p (sectp
->name
, &names
->addr
))
2161 dwarf2_per_objfile
->addr
.s
.asection
= sectp
;
2162 dwarf2_per_objfile
->addr
.size
= bfd_get_section_size (sectp
);
2164 else if (section_is_p (sectp
->name
, &names
->frame
))
2166 dwarf2_per_objfile
->frame
.s
.asection
= sectp
;
2167 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
2169 else if (section_is_p (sectp
->name
, &names
->eh_frame
))
2171 dwarf2_per_objfile
->eh_frame
.s
.asection
= sectp
;
2172 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
2174 else if (section_is_p (sectp
->name
, &names
->ranges
))
2176 dwarf2_per_objfile
->ranges
.s
.asection
= sectp
;
2177 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
2179 else if (section_is_p (sectp
->name
, &names
->types
))
2181 struct dwarf2_section_info type_section
;
2183 memset (&type_section
, 0, sizeof (type_section
));
2184 type_section
.s
.asection
= sectp
;
2185 type_section
.size
= bfd_get_section_size (sectp
);
2187 VEC_safe_push (dwarf2_section_info_def
, dwarf2_per_objfile
->types
,
2190 else if (section_is_p (sectp
->name
, &names
->gdb_index
))
2192 dwarf2_per_objfile
->gdb_index
.s
.asection
= sectp
;
2193 dwarf2_per_objfile
->gdb_index
.size
= bfd_get_section_size (sectp
);
2196 if ((bfd_get_section_flags (abfd
, sectp
) & SEC_LOAD
)
2197 && bfd_section_vma (abfd
, sectp
) == 0)
2198 dwarf2_per_objfile
->has_section_at_zero
= 1;
2201 /* A helper function that decides whether a section is empty,
2205 dwarf2_section_empty_p (const struct dwarf2_section_info
*section
)
2207 if (section
->is_virtual
)
2208 return section
->size
== 0;
2209 return section
->s
.asection
== NULL
|| section
->size
== 0;
2212 /* Read the contents of the section INFO.
2213 OBJFILE is the main object file, but not necessarily the file where
2214 the section comes from. E.g., for DWO files the bfd of INFO is the bfd
2216 If the section is compressed, uncompress it before returning. */
2219 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
2223 gdb_byte
*buf
, *retbuf
;
2227 info
->buffer
= NULL
;
2230 if (dwarf2_section_empty_p (info
))
2233 sectp
= get_section_bfd_section (info
);
2235 /* If this is a virtual section we need to read in the real one first. */
2236 if (info
->is_virtual
)
2238 struct dwarf2_section_info
*containing_section
=
2239 get_containing_section (info
);
2241 gdb_assert (sectp
!= NULL
);
2242 if ((sectp
->flags
& SEC_RELOC
) != 0)
2244 error (_("Dwarf Error: DWP format V2 with relocations is not"
2245 " supported in section %s [in module %s]"),
2246 get_section_name (info
), get_section_file_name (info
));
2248 dwarf2_read_section (objfile
, containing_section
);
2249 /* Other code should have already caught virtual sections that don't
2251 gdb_assert (info
->virtual_offset
+ info
->size
2252 <= containing_section
->size
);
2253 /* If the real section is empty or there was a problem reading the
2254 section we shouldn't get here. */
2255 gdb_assert (containing_section
->buffer
!= NULL
);
2256 info
->buffer
= containing_section
->buffer
+ info
->virtual_offset
;
2260 /* If the section has relocations, we must read it ourselves.
2261 Otherwise we attach it to the BFD. */
2262 if ((sectp
->flags
& SEC_RELOC
) == 0)
2264 info
->buffer
= gdb_bfd_map_section (sectp
, &info
->size
);
2268 buf
= obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
2271 /* When debugging .o files, we may need to apply relocations; see
2272 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
2273 We never compress sections in .o files, so we only need to
2274 try this when the section is not compressed. */
2275 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
2278 info
->buffer
= retbuf
;
2282 abfd
= get_section_bfd_owner (info
);
2283 gdb_assert (abfd
!= NULL
);
2285 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
2286 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
2288 error (_("Dwarf Error: Can't read DWARF data"
2289 " in section %s [in module %s]"),
2290 bfd_section_name (abfd
, sectp
), bfd_get_filename (abfd
));
2294 /* A helper function that returns the size of a section in a safe way.
2295 If you are positive that the section has been read before using the
2296 size, then it is safe to refer to the dwarf2_section_info object's
2297 "size" field directly. In other cases, you must call this
2298 function, because for compressed sections the size field is not set
2299 correctly until the section has been read. */
2301 static bfd_size_type
2302 dwarf2_section_size (struct objfile
*objfile
,
2303 struct dwarf2_section_info
*info
)
2306 dwarf2_read_section (objfile
, info
);
2310 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2314 dwarf2_get_section_info (struct objfile
*objfile
,
2315 enum dwarf2_section_enum sect
,
2316 asection
**sectp
, const gdb_byte
**bufp
,
2317 bfd_size_type
*sizep
)
2319 struct dwarf2_per_objfile
*data
2320 = objfile_data (objfile
, dwarf2_objfile_data_key
);
2321 struct dwarf2_section_info
*info
;
2323 /* We may see an objfile without any DWARF, in which case we just
2334 case DWARF2_DEBUG_FRAME
:
2335 info
= &data
->frame
;
2337 case DWARF2_EH_FRAME
:
2338 info
= &data
->eh_frame
;
2341 gdb_assert_not_reached ("unexpected section");
2344 dwarf2_read_section (objfile
, info
);
2346 *sectp
= get_section_bfd_section (info
);
2347 *bufp
= info
->buffer
;
2348 *sizep
= info
->size
;
2351 /* A helper function to find the sections for a .dwz file. */
2354 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2356 struct dwz_file
*dwz_file
= arg
;
2358 /* Note that we only support the standard ELF names, because .dwz
2359 is ELF-only (at the time of writing). */
2360 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2362 dwz_file
->abbrev
.s
.asection
= sectp
;
2363 dwz_file
->abbrev
.size
= bfd_get_section_size (sectp
);
2365 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2367 dwz_file
->info
.s
.asection
= sectp
;
2368 dwz_file
->info
.size
= bfd_get_section_size (sectp
);
2370 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2372 dwz_file
->str
.s
.asection
= sectp
;
2373 dwz_file
->str
.size
= bfd_get_section_size (sectp
);
2375 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2377 dwz_file
->line
.s
.asection
= sectp
;
2378 dwz_file
->line
.size
= bfd_get_section_size (sectp
);
2380 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2382 dwz_file
->macro
.s
.asection
= sectp
;
2383 dwz_file
->macro
.size
= bfd_get_section_size (sectp
);
2385 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2387 dwz_file
->gdb_index
.s
.asection
= sectp
;
2388 dwz_file
->gdb_index
.size
= bfd_get_section_size (sectp
);
2392 /* Open the separate '.dwz' debug file, if needed. Return NULL if
2393 there is no .gnu_debugaltlink section in the file. Error if there
2394 is such a section but the file cannot be found. */
2396 static struct dwz_file
*
2397 dwarf2_get_dwz_file (void)
2401 struct cleanup
*cleanup
;
2402 const char *filename
;
2403 struct dwz_file
*result
;
2404 bfd_size_type buildid_len_arg
;
2408 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2409 return dwarf2_per_objfile
->dwz_file
;
2411 bfd_set_error (bfd_error_no_error
);
2412 data
= bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2413 &buildid_len_arg
, &buildid
);
2416 if (bfd_get_error () == bfd_error_no_error
)
2418 error (_("could not read '.gnu_debugaltlink' section: %s"),
2419 bfd_errmsg (bfd_get_error ()));
2421 cleanup
= make_cleanup (xfree
, data
);
2422 make_cleanup (xfree
, buildid
);
2424 buildid_len
= (size_t) buildid_len_arg
;
2426 filename
= (const char *) data
;
2427 if (!IS_ABSOLUTE_PATH (filename
))
2429 char *abs
= gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2432 make_cleanup (xfree
, abs
);
2433 abs
= ldirname (abs
);
2434 make_cleanup (xfree
, abs
);
2436 rel
= concat (abs
, SLASH_STRING
, filename
, (char *) NULL
);
2437 make_cleanup (xfree
, rel
);
2441 /* First try the file name given in the section. If that doesn't
2442 work, try to use the build-id instead. */
2443 dwz_bfd
= gdb_bfd_open (filename
, gnutarget
, -1);
2444 if (dwz_bfd
!= NULL
)
2446 if (!build_id_verify (dwz_bfd
, buildid_len
, buildid
))
2448 gdb_bfd_unref (dwz_bfd
);
2453 if (dwz_bfd
== NULL
)
2454 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2456 if (dwz_bfd
== NULL
)
2457 error (_("could not find '.gnu_debugaltlink' file for %s"),
2458 objfile_name (dwarf2_per_objfile
->objfile
));
2460 result
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
2462 result
->dwz_bfd
= dwz_bfd
;
2464 bfd_map_over_sections (dwz_bfd
, locate_dwz_sections
, result
);
2466 do_cleanups (cleanup
);
2468 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, dwz_bfd
);
2469 dwarf2_per_objfile
->dwz_file
= result
;
2473 /* DWARF quick_symbols_functions support. */
2475 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2476 unique line tables, so we maintain a separate table of all .debug_line
2477 derived entries to support the sharing.
2478 All the quick functions need is the list of file names. We discard the
2479 line_header when we're done and don't need to record it here. */
2480 struct quick_file_names
2482 /* The data used to construct the hash key. */
2483 struct stmt_list_hash hash
;
2485 /* The number of entries in file_names, real_names. */
2486 unsigned int num_file_names
;
2488 /* The file names from the line table, after being run through
2490 const char **file_names
;
2492 /* The file names from the line table after being run through
2493 gdb_realpath. These are computed lazily. */
2494 const char **real_names
;
2497 /* When using the index (and thus not using psymtabs), each CU has an
2498 object of this type. This is used to hold information needed by
2499 the various "quick" methods. */
2500 struct dwarf2_per_cu_quick_data
2502 /* The file table. This can be NULL if there was no file table
2503 or it's currently not read in.
2504 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2505 struct quick_file_names
*file_names
;
2507 /* The corresponding symbol table. This is NULL if symbols for this
2508 CU have not yet been read. */
2509 struct symtab
*symtab
;
2511 /* A temporary mark bit used when iterating over all CUs in
2512 expand_symtabs_matching. */
2513 unsigned int mark
: 1;
2515 /* True if we've tried to read the file table and found there isn't one.
2516 There will be no point in trying to read it again next time. */
2517 unsigned int no_file_data
: 1;
2520 /* Utility hash function for a stmt_list_hash. */
2523 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2527 if (stmt_list_hash
->dwo_unit
!= NULL
)
2528 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2529 v
+= stmt_list_hash
->line_offset
.sect_off
;
2533 /* Utility equality function for a stmt_list_hash. */
2536 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2537 const struct stmt_list_hash
*rhs
)
2539 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2541 if (lhs
->dwo_unit
!= NULL
2542 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2545 return lhs
->line_offset
.sect_off
== rhs
->line_offset
.sect_off
;
2548 /* Hash function for a quick_file_names. */
2551 hash_file_name_entry (const void *e
)
2553 const struct quick_file_names
*file_data
= e
;
2555 return hash_stmt_list_entry (&file_data
->hash
);
2558 /* Equality function for a quick_file_names. */
2561 eq_file_name_entry (const void *a
, const void *b
)
2563 const struct quick_file_names
*ea
= a
;
2564 const struct quick_file_names
*eb
= b
;
2566 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2569 /* Delete function for a quick_file_names. */
2572 delete_file_name_entry (void *e
)
2574 struct quick_file_names
*file_data
= e
;
2577 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2579 xfree ((void*) file_data
->file_names
[i
]);
2580 if (file_data
->real_names
)
2581 xfree ((void*) file_data
->real_names
[i
]);
2584 /* The space for the struct itself lives on objfile_obstack,
2585 so we don't free it here. */
2588 /* Create a quick_file_names hash table. */
2591 create_quick_file_names_table (unsigned int nr_initial_entries
)
2593 return htab_create_alloc (nr_initial_entries
,
2594 hash_file_name_entry
, eq_file_name_entry
,
2595 delete_file_name_entry
, xcalloc
, xfree
);
2598 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2599 have to be created afterwards. You should call age_cached_comp_units after
2600 processing PER_CU->CU. dw2_setup must have been already called. */
2603 load_cu (struct dwarf2_per_cu_data
*per_cu
)
2605 if (per_cu
->is_debug_types
)
2606 load_full_type_unit (per_cu
);
2608 load_full_comp_unit (per_cu
, language_minimal
);
2610 gdb_assert (per_cu
->cu
!= NULL
);
2612 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2615 /* Read in the symbols for PER_CU. */
2618 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2620 struct cleanup
*back_to
;
2622 /* Skip type_unit_groups, reading the type units they contain
2623 is handled elsewhere. */
2624 if (IS_TYPE_UNIT_GROUP (per_cu
))
2627 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
2629 if (dwarf2_per_objfile
->using_index
2630 ? per_cu
->v
.quick
->symtab
== NULL
2631 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2633 queue_comp_unit (per_cu
, language_minimal
);
2636 /* If we just loaded a CU from a DWO, and we're working with an index
2637 that may badly handle TUs, load all the TUs in that DWO as well.
2638 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2639 if (!per_cu
->is_debug_types
2640 && per_cu
->cu
->dwo_unit
!= NULL
2641 && dwarf2_per_objfile
->index_table
!= NULL
2642 && dwarf2_per_objfile
->index_table
->version
<= 7
2643 /* DWP files aren't supported yet. */
2644 && get_dwp_file () == NULL
)
2645 queue_and_load_all_dwo_tus (per_cu
);
2650 /* Age the cache, releasing compilation units that have not
2651 been used recently. */
2652 age_cached_comp_units ();
2654 do_cleanups (back_to
);
2657 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2658 the objfile from which this CU came. Returns the resulting symbol
2661 static struct symtab
*
2662 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2664 gdb_assert (dwarf2_per_objfile
->using_index
);
2665 if (!per_cu
->v
.quick
->symtab
)
2667 struct cleanup
*back_to
= make_cleanup (free_cached_comp_units
, NULL
);
2668 increment_reading_symtab ();
2669 dw2_do_instantiate_symtab (per_cu
);
2670 process_cu_includes ();
2671 do_cleanups (back_to
);
2673 return per_cu
->v
.quick
->symtab
;
2676 /* Return the CU given its index.
2678 This is intended for loops like:
2680 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2681 + dwarf2_per_objfile->n_type_units); ++i)
2683 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
2689 static struct dwarf2_per_cu_data
*
2690 dw2_get_cu (int index
)
2692 if (index
>= dwarf2_per_objfile
->n_comp_units
)
2694 index
-= dwarf2_per_objfile
->n_comp_units
;
2695 gdb_assert (index
< dwarf2_per_objfile
->n_type_units
);
2696 return &dwarf2_per_objfile
->all_type_units
[index
]->per_cu
;
2699 return dwarf2_per_objfile
->all_comp_units
[index
];
2702 /* Return the primary CU given its index.
2703 The difference between this function and dw2_get_cu is in the handling
2704 of type units (TUs). Here we return the type_unit_group object.
2706 This is intended for loops like:
2708 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2709 + dwarf2_per_objfile->n_type_unit_groups); ++i)
2711 struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i);
2717 static struct dwarf2_per_cu_data
*
2718 dw2_get_primary_cu (int index
)
2720 if (index
>= dwarf2_per_objfile
->n_comp_units
)
2722 index
-= dwarf2_per_objfile
->n_comp_units
;
2723 gdb_assert (index
< dwarf2_per_objfile
->n_type_unit_groups
);
2724 return &dwarf2_per_objfile
->all_type_unit_groups
[index
]->per_cu
;
2727 return dwarf2_per_objfile
->all_comp_units
[index
];
2730 /* A helper for create_cus_from_index that handles a given list of
2734 create_cus_from_index_list (struct objfile
*objfile
,
2735 const gdb_byte
*cu_list
, offset_type n_elements
,
2736 struct dwarf2_section_info
*section
,
2742 for (i
= 0; i
< n_elements
; i
+= 2)
2744 struct dwarf2_per_cu_data
*the_cu
;
2745 ULONGEST offset
, length
;
2747 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2748 offset
= extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2749 length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2752 the_cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2753 struct dwarf2_per_cu_data
);
2754 the_cu
->offset
.sect_off
= offset
;
2755 the_cu
->length
= length
;
2756 the_cu
->objfile
= objfile
;
2757 the_cu
->section
= section
;
2758 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2759 struct dwarf2_per_cu_quick_data
);
2760 the_cu
->is_dwz
= is_dwz
;
2761 dwarf2_per_objfile
->all_comp_units
[base_offset
+ i
/ 2] = the_cu
;
2765 /* Read the CU list from the mapped index, and use it to create all
2766 the CU objects for this objfile. */
2769 create_cus_from_index (struct objfile
*objfile
,
2770 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
2771 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
2773 struct dwz_file
*dwz
;
2775 dwarf2_per_objfile
->n_comp_units
= (cu_list_elements
+ dwz_elements
) / 2;
2776 dwarf2_per_objfile
->all_comp_units
2777 = obstack_alloc (&objfile
->objfile_obstack
,
2778 dwarf2_per_objfile
->n_comp_units
2779 * sizeof (struct dwarf2_per_cu_data
*));
2781 create_cus_from_index_list (objfile
, cu_list
, cu_list_elements
,
2782 &dwarf2_per_objfile
->info
, 0, 0);
2784 if (dwz_elements
== 0)
2787 dwz
= dwarf2_get_dwz_file ();
2788 create_cus_from_index_list (objfile
, dwz_list
, dwz_elements
, &dwz
->info
, 1,
2789 cu_list_elements
/ 2);
2792 /* Create the signatured type hash table from the index. */
2795 create_signatured_type_table_from_index (struct objfile
*objfile
,
2796 struct dwarf2_section_info
*section
,
2797 const gdb_byte
*bytes
,
2798 offset_type elements
)
2801 htab_t sig_types_hash
;
2803 dwarf2_per_objfile
->n_type_units
= elements
/ 3;
2804 dwarf2_per_objfile
->all_type_units
2805 = xmalloc (dwarf2_per_objfile
->n_type_units
2806 * sizeof (struct signatured_type
*));
2808 sig_types_hash
= allocate_signatured_type_table (objfile
);
2810 for (i
= 0; i
< elements
; i
+= 3)
2812 struct signatured_type
*sig_type
;
2813 ULONGEST offset
, type_offset_in_tu
, signature
;
2816 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2817 offset
= extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
2818 type_offset_in_tu
= extract_unsigned_integer (bytes
+ 8, 8,
2820 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
2823 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2824 struct signatured_type
);
2825 sig_type
->signature
= signature
;
2826 sig_type
->type_offset_in_tu
.cu_off
= type_offset_in_tu
;
2827 sig_type
->per_cu
.is_debug_types
= 1;
2828 sig_type
->per_cu
.section
= section
;
2829 sig_type
->per_cu
.offset
.sect_off
= offset
;
2830 sig_type
->per_cu
.objfile
= objfile
;
2831 sig_type
->per_cu
.v
.quick
2832 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2833 struct dwarf2_per_cu_quick_data
);
2835 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
2838 dwarf2_per_objfile
->all_type_units
[i
/ 3] = sig_type
;
2841 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
2844 /* Read the address map data from the mapped index, and use it to
2845 populate the objfile's psymtabs_addrmap. */
2848 create_addrmap_from_index (struct objfile
*objfile
, struct mapped_index
*index
)
2850 const gdb_byte
*iter
, *end
;
2851 struct obstack temp_obstack
;
2852 struct addrmap
*mutable_map
;
2853 struct cleanup
*cleanup
;
2856 obstack_init (&temp_obstack
);
2857 cleanup
= make_cleanup_obstack_free (&temp_obstack
);
2858 mutable_map
= addrmap_create_mutable (&temp_obstack
);
2860 iter
= index
->address_table
;
2861 end
= iter
+ index
->address_table_size
;
2863 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2867 ULONGEST hi
, lo
, cu_index
;
2868 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2870 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2872 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
2877 complaint (&symfile_complaints
,
2878 _(".gdb_index address table has invalid range (%s - %s)"),
2879 hex_string (lo
), hex_string (hi
));
2883 if (cu_index
>= dwarf2_per_objfile
->n_comp_units
)
2885 complaint (&symfile_complaints
,
2886 _(".gdb_index address table has invalid CU number %u"),
2887 (unsigned) cu_index
);
2891 addrmap_set_empty (mutable_map
, lo
+ baseaddr
, hi
+ baseaddr
- 1,
2892 dw2_get_cu (cu_index
));
2895 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
2896 &objfile
->objfile_obstack
);
2897 do_cleanups (cleanup
);
2900 /* The hash function for strings in the mapped index. This is the same as
2901 SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the
2902 implementation. This is necessary because the hash function is tied to the
2903 format of the mapped index file. The hash values do not have to match with
2906 Use INT_MAX for INDEX_VERSION if you generate the current index format. */
2909 mapped_index_string_hash (int index_version
, const void *p
)
2911 const unsigned char *str
= (const unsigned char *) p
;
2915 while ((c
= *str
++) != 0)
2917 if (index_version
>= 5)
2919 r
= r
* 67 + c
- 113;
2925 /* Find a slot in the mapped index INDEX for the object named NAME.
2926 If NAME is found, set *VEC_OUT to point to the CU vector in the
2927 constant pool and return 1. If NAME cannot be found, return 0. */
2930 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
2931 offset_type
**vec_out
)
2933 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
2935 offset_type slot
, step
;
2936 int (*cmp
) (const char *, const char *);
2938 if (current_language
->la_language
== language_cplus
2939 || current_language
->la_language
== language_java
2940 || current_language
->la_language
== language_fortran
)
2942 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
2944 const char *paren
= strchr (name
, '(');
2950 dup
= xmalloc (paren
- name
+ 1);
2951 memcpy (dup
, name
, paren
- name
);
2952 dup
[paren
- name
] = 0;
2954 make_cleanup (xfree
, dup
);
2959 /* Index version 4 did not support case insensitive searches. But the
2960 indices for case insensitive languages are built in lowercase, therefore
2961 simulate our NAME being searched is also lowercased. */
2962 hash
= mapped_index_string_hash ((index
->version
== 4
2963 && case_sensitivity
== case_sensitive_off
2964 ? 5 : index
->version
),
2967 slot
= hash
& (index
->symbol_table_slots
- 1);
2968 step
= ((hash
* 17) & (index
->symbol_table_slots
- 1)) | 1;
2969 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
2973 /* Convert a slot number to an offset into the table. */
2974 offset_type i
= 2 * slot
;
2976 if (index
->symbol_table
[i
] == 0 && index
->symbol_table
[i
+ 1] == 0)
2978 do_cleanups (back_to
);
2982 str
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[i
]);
2983 if (!cmp (name
, str
))
2985 *vec_out
= (offset_type
*) (index
->constant_pool
2986 + MAYBE_SWAP (index
->symbol_table
[i
+ 1]));
2987 do_cleanups (back_to
);
2991 slot
= (slot
+ step
) & (index
->symbol_table_slots
- 1);
2995 /* A helper function that reads the .gdb_index from SECTION and fills
2996 in MAP. FILENAME is the name of the file containing the section;
2997 it is used for error reporting. DEPRECATED_OK is nonzero if it is
2998 ok to use deprecated sections.
3000 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
3001 out parameters that are filled in with information about the CU and
3002 TU lists in the section.
3004 Returns 1 if all went well, 0 otherwise. */
3007 read_index_from_section (struct objfile
*objfile
,
3008 const char *filename
,
3010 struct dwarf2_section_info
*section
,
3011 struct mapped_index
*map
,
3012 const gdb_byte
**cu_list
,
3013 offset_type
*cu_list_elements
,
3014 const gdb_byte
**types_list
,
3015 offset_type
*types_list_elements
)
3017 const gdb_byte
*addr
;
3018 offset_type version
;
3019 offset_type
*metadata
;
3022 if (dwarf2_section_empty_p (section
))
3025 /* Older elfutils strip versions could keep the section in the main
3026 executable while splitting it for the separate debug info file. */
3027 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
3030 dwarf2_read_section (objfile
, section
);
3032 addr
= section
->buffer
;
3033 /* Version check. */
3034 version
= MAYBE_SWAP (*(offset_type
*) addr
);
3035 /* Versions earlier than 3 emitted every copy of a psymbol. This
3036 causes the index to behave very poorly for certain requests. Version 3
3037 contained incomplete addrmap. So, it seems better to just ignore such
3041 static int warning_printed
= 0;
3042 if (!warning_printed
)
3044 warning (_("Skipping obsolete .gdb_index section in %s."),
3046 warning_printed
= 1;
3050 /* Index version 4 uses a different hash function than index version
3053 Versions earlier than 6 did not emit psymbols for inlined
3054 functions. Using these files will cause GDB not to be able to
3055 set breakpoints on inlined functions by name, so we ignore these
3056 indices unless the user has done
3057 "set use-deprecated-index-sections on". */
3058 if (version
< 6 && !deprecated_ok
)
3060 static int warning_printed
= 0;
3061 if (!warning_printed
)
3064 Skipping deprecated .gdb_index section in %s.\n\
3065 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3066 to use the section anyway."),
3068 warning_printed
= 1;
3072 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3073 of the TU (for symbols coming from TUs),
3074 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3075 Plus gold-generated indices can have duplicate entries for global symbols,
3076 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3077 These are just performance bugs, and we can't distinguish gdb-generated
3078 indices from gold-generated ones, so issue no warning here. */
3080 /* Indexes with higher version than the one supported by GDB may be no
3081 longer backward compatible. */
3085 map
->version
= version
;
3086 map
->total_size
= section
->size
;
3088 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3091 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3092 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3096 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3097 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3098 - MAYBE_SWAP (metadata
[i
]))
3102 map
->address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3103 map
->address_table_size
= (MAYBE_SWAP (metadata
[i
+ 1])
3104 - MAYBE_SWAP (metadata
[i
]));
3107 map
->symbol_table
= (offset_type
*) (addr
+ MAYBE_SWAP (metadata
[i
]));
3108 map
->symbol_table_slots
= ((MAYBE_SWAP (metadata
[i
+ 1])
3109 - MAYBE_SWAP (metadata
[i
]))
3110 / (2 * sizeof (offset_type
)));
3113 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3119 /* Read the index file. If everything went ok, initialize the "quick"
3120 elements of all the CUs and return 1. Otherwise, return 0. */
3123 dwarf2_read_index (struct objfile
*objfile
)
3125 struct mapped_index local_map
, *map
;
3126 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3127 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3128 struct dwz_file
*dwz
;
3130 if (!read_index_from_section (objfile
, objfile_name (objfile
),
3131 use_deprecated_index_sections
,
3132 &dwarf2_per_objfile
->gdb_index
, &local_map
,
3133 &cu_list
, &cu_list_elements
,
3134 &types_list
, &types_list_elements
))
3137 /* Don't use the index if it's empty. */
3138 if (local_map
.symbol_table_slots
== 0)
3141 /* If there is a .dwz file, read it so we can get its CU list as
3143 dwz
= dwarf2_get_dwz_file ();
3146 struct mapped_index dwz_map
;
3147 const gdb_byte
*dwz_types_ignore
;
3148 offset_type dwz_types_elements_ignore
;
3150 if (!read_index_from_section (objfile
, bfd_get_filename (dwz
->dwz_bfd
),
3152 &dwz
->gdb_index
, &dwz_map
,
3153 &dwz_list
, &dwz_list_elements
,
3155 &dwz_types_elements_ignore
))
3157 warning (_("could not read '.gdb_index' section from %s; skipping"),
3158 bfd_get_filename (dwz
->dwz_bfd
));
3163 create_cus_from_index (objfile
, cu_list
, cu_list_elements
, dwz_list
,
3166 if (types_list_elements
)
3168 struct dwarf2_section_info
*section
;
3170 /* We can only handle a single .debug_types when we have an
3172 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
3175 section
= VEC_index (dwarf2_section_info_def
,
3176 dwarf2_per_objfile
->types
, 0);
3178 create_signatured_type_table_from_index (objfile
, section
, types_list
,
3179 types_list_elements
);
3182 create_addrmap_from_index (objfile
, &local_map
);
3184 map
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct mapped_index
));
3187 dwarf2_per_objfile
->index_table
= map
;
3188 dwarf2_per_objfile
->using_index
= 1;
3189 dwarf2_per_objfile
->quick_file_names_table
=
3190 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
3195 /* A helper for the "quick" functions which sets the global
3196 dwarf2_per_objfile according to OBJFILE. */
3199 dw2_setup (struct objfile
*objfile
)
3201 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
3202 gdb_assert (dwarf2_per_objfile
);
3205 /* die_reader_func for dw2_get_file_names. */
3208 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3209 const gdb_byte
*info_ptr
,
3210 struct die_info
*comp_unit_die
,
3214 struct dwarf2_cu
*cu
= reader
->cu
;
3215 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3216 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3217 struct dwarf2_per_cu_data
*lh_cu
;
3218 struct line_header
*lh
;
3219 struct attribute
*attr
;
3221 const char *name
, *comp_dir
;
3223 struct quick_file_names
*qfn
;
3224 unsigned int line_offset
;
3226 gdb_assert (! this_cu
->is_debug_types
);
3228 /* Our callers never want to match partial units -- instead they
3229 will match the enclosing full CU. */
3230 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3232 this_cu
->v
.quick
->no_file_data
= 1;
3241 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3244 struct quick_file_names find_entry
;
3246 line_offset
= DW_UNSND (attr
);
3248 /* We may have already read in this line header (TU line header sharing).
3249 If we have we're done. */
3250 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3251 find_entry
.hash
.line_offset
.sect_off
= line_offset
;
3252 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
3253 &find_entry
, INSERT
);
3256 lh_cu
->v
.quick
->file_names
= *slot
;
3260 lh
= dwarf_decode_line_header (line_offset
, cu
);
3264 lh_cu
->v
.quick
->no_file_data
= 1;
3268 qfn
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*qfn
));
3269 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3270 qfn
->hash
.line_offset
.sect_off
= line_offset
;
3271 gdb_assert (slot
!= NULL
);
3274 find_file_and_directory (comp_unit_die
, cu
, &name
, &comp_dir
);
3276 qfn
->num_file_names
= lh
->num_file_names
;
3277 qfn
->file_names
= obstack_alloc (&objfile
->objfile_obstack
,
3278 lh
->num_file_names
* sizeof (char *));
3279 for (i
= 0; i
< lh
->num_file_names
; ++i
)
3280 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
, comp_dir
);
3281 qfn
->real_names
= NULL
;
3283 free_line_header (lh
);
3285 lh_cu
->v
.quick
->file_names
= qfn
;
3288 /* A helper for the "quick" functions which attempts to read the line
3289 table for THIS_CU. */
3291 static struct quick_file_names
*
3292 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3294 /* This should never be called for TUs. */
3295 gdb_assert (! this_cu
->is_debug_types
);
3296 /* Nor type unit groups. */
3297 gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu
));
3299 if (this_cu
->v
.quick
->file_names
!= NULL
)
3300 return this_cu
->v
.quick
->file_names
;
3301 /* If we know there is no line data, no point in looking again. */
3302 if (this_cu
->v
.quick
->no_file_data
)
3305 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
3307 if (this_cu
->v
.quick
->no_file_data
)
3309 return this_cu
->v
.quick
->file_names
;
3312 /* A helper for the "quick" functions which computes and caches the
3313 real path for a given file name from the line table. */
3316 dw2_get_real_path (struct objfile
*objfile
,
3317 struct quick_file_names
*qfn
, int index
)
3319 if (qfn
->real_names
== NULL
)
3320 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
3321 qfn
->num_file_names
, char *);
3323 if (qfn
->real_names
[index
] == NULL
)
3324 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]);
3326 return qfn
->real_names
[index
];
3329 static struct symtab
*
3330 dw2_find_last_source_symtab (struct objfile
*objfile
)
3334 dw2_setup (objfile
);
3335 index
= dwarf2_per_objfile
->n_comp_units
- 1;
3336 return dw2_instantiate_symtab (dw2_get_cu (index
));
3339 /* Traversal function for dw2_forget_cached_source_info. */
3342 dw2_free_cached_file_names (void **slot
, void *info
)
3344 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3346 if (file_data
->real_names
)
3350 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3352 xfree ((void*) file_data
->real_names
[i
]);
3353 file_data
->real_names
[i
] = NULL
;
3361 dw2_forget_cached_source_info (struct objfile
*objfile
)
3363 dw2_setup (objfile
);
3365 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
3366 dw2_free_cached_file_names
, NULL
);
3369 /* Helper function for dw2_map_symtabs_matching_filename that expands
3370 the symtabs and calls the iterator. */
3373 dw2_map_expand_apply (struct objfile
*objfile
,
3374 struct dwarf2_per_cu_data
*per_cu
,
3375 const char *name
, const char *real_path
,
3376 int (*callback
) (struct symtab
*, void *),
3379 struct symtab
*last_made
= objfile
->symtabs
;
3381 /* Don't visit already-expanded CUs. */
3382 if (per_cu
->v
.quick
->symtab
)
3385 /* This may expand more than one symtab, and we want to iterate over
3387 dw2_instantiate_symtab (per_cu
);
3389 return iterate_over_some_symtabs (name
, real_path
, callback
, data
,
3390 objfile
->symtabs
, last_made
);
3393 /* Implementation of the map_symtabs_matching_filename method. */
3396 dw2_map_symtabs_matching_filename (struct objfile
*objfile
, const char *name
,
3397 const char *real_path
,
3398 int (*callback
) (struct symtab
*, void *),
3402 const char *name_basename
= lbasename (name
);
3404 dw2_setup (objfile
);
3406 /* The rule is CUs specify all the files, including those used by
3407 any TU, so there's no need to scan TUs here. */
3409 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3412 struct dwarf2_per_cu_data
*per_cu
= dw2_get_primary_cu (i
);
3413 struct quick_file_names
*file_data
;
3415 /* We only need to look at symtabs not already expanded. */
3416 if (per_cu
->v
.quick
->symtab
)
3419 file_data
= dw2_get_file_names (per_cu
);
3420 if (file_data
== NULL
)
3423 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3425 const char *this_name
= file_data
->file_names
[j
];
3426 const char *this_real_name
;
3428 if (compare_filenames_for_search (this_name
, name
))
3430 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3436 /* Before we invoke realpath, which can get expensive when many
3437 files are involved, do a quick comparison of the basenames. */
3438 if (! basenames_may_differ
3439 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3442 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3443 if (compare_filenames_for_search (this_real_name
, name
))
3445 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3451 if (real_path
!= NULL
)
3453 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3454 gdb_assert (IS_ABSOLUTE_PATH (name
));
3455 if (this_real_name
!= NULL
3456 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3458 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3470 /* Struct used to manage iterating over all CUs looking for a symbol. */
3472 struct dw2_symtab_iterator
3474 /* The internalized form of .gdb_index. */
3475 struct mapped_index
*index
;
3476 /* If non-zero, only look for symbols that match BLOCK_INDEX. */
3477 int want_specific_block
;
3478 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
3479 Unused if !WANT_SPECIFIC_BLOCK. */
3481 /* The kind of symbol we're looking for. */
3483 /* The list of CUs from the index entry of the symbol,
3484 or NULL if not found. */
3486 /* The next element in VEC to look at. */
3488 /* The number of elements in VEC, or zero if there is no match. */
3490 /* Have we seen a global version of the symbol?
3491 If so we can ignore all further global instances.
3492 This is to work around gold/15646, inefficient gold-generated
3497 /* Initialize the index symtab iterator ITER.
3498 If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols
3499 in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
3502 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3503 struct mapped_index
*index
,
3504 int want_specific_block
,
3509 iter
->index
= index
;
3510 iter
->want_specific_block
= want_specific_block
;
3511 iter
->block_index
= block_index
;
3512 iter
->domain
= domain
;
3514 iter
->global_seen
= 0;
3516 if (find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3517 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3525 /* Return the next matching CU or NULL if there are no more. */
3527 static struct dwarf2_per_cu_data
*
3528 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3530 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3532 offset_type cu_index_and_attrs
=
3533 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3534 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3535 struct dwarf2_per_cu_data
*per_cu
;
3536 int want_static
= iter
->block_index
!= GLOBAL_BLOCK
;
3537 /* This value is only valid for index versions >= 7. */
3538 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3539 gdb_index_symbol_kind symbol_kind
=
3540 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3541 /* Only check the symbol attributes if they're present.
3542 Indices prior to version 7 don't record them,
3543 and indices >= 7 may elide them for certain symbols
3544 (gold does this). */
3546 (iter
->index
->version
>= 7
3547 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3549 /* Don't crash on bad data. */
3550 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
3551 + dwarf2_per_objfile
->n_type_units
))
3553 complaint (&symfile_complaints
,
3554 _(".gdb_index entry has bad CU index"
3556 objfile_name (dwarf2_per_objfile
->objfile
));
3560 per_cu
= dw2_get_cu (cu_index
);
3562 /* Skip if already read in. */
3563 if (per_cu
->v
.quick
->symtab
)
3566 /* Check static vs global. */
3569 if (iter
->want_specific_block
3570 && want_static
!= is_static
)
3572 /* Work around gold/15646. */
3573 if (!is_static
&& iter
->global_seen
)
3576 iter
->global_seen
= 1;
3579 /* Only check the symbol's kind if it has one. */
3582 switch (iter
->domain
)
3585 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3586 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3587 /* Some types are also in VAR_DOMAIN. */
3588 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3592 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3596 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3611 static struct symtab
*
3612 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
3613 const char *name
, domain_enum domain
)
3615 struct symtab
*stab_best
= NULL
;
3616 struct mapped_index
*index
;
3618 dw2_setup (objfile
);
3620 index
= dwarf2_per_objfile
->index_table
;
3622 /* index is NULL if OBJF_READNOW. */
3625 struct dw2_symtab_iterator iter
;
3626 struct dwarf2_per_cu_data
*per_cu
;
3628 dw2_symtab_iter_init (&iter
, index
, 1, block_index
, domain
, name
);
3630 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3632 struct symbol
*sym
= NULL
;
3633 struct symtab
*stab
= dw2_instantiate_symtab (per_cu
);
3635 /* Some caution must be observed with overloaded functions
3636 and methods, since the index will not contain any overload
3637 information (but NAME might contain it). */
3640 struct blockvector
*bv
= BLOCKVECTOR (stab
);
3641 struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
3643 sym
= lookup_block_symbol (block
, name
, domain
);
3646 if (sym
&& strcmp_iw (SYMBOL_SEARCH_NAME (sym
), name
) == 0)
3648 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
3654 /* Keep looking through other CUs. */
3662 dw2_print_stats (struct objfile
*objfile
)
3664 int i
, total
, count
;
3666 dw2_setup (objfile
);
3667 total
= dwarf2_per_objfile
->n_comp_units
+ dwarf2_per_objfile
->n_type_units
;
3669 for (i
= 0; i
< total
; ++i
)
3671 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3673 if (!per_cu
->v
.quick
->symtab
)
3676 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
3677 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3680 /* This dumps minimal information about the index.
3681 It is called via "mt print objfiles".
3682 One use is to verify .gdb_index has been loaded by the
3683 gdb.dwarf2/gdb-index.exp testcase. */
3686 dw2_dump (struct objfile
*objfile
)
3688 dw2_setup (objfile
);
3689 gdb_assert (dwarf2_per_objfile
->using_index
);
3690 printf_filtered (".gdb_index:");
3691 if (dwarf2_per_objfile
->index_table
!= NULL
)
3693 printf_filtered (" version %d\n",
3694 dwarf2_per_objfile
->index_table
->version
);
3697 printf_filtered (" faked for \"readnow\"\n");
3698 printf_filtered ("\n");
3702 dw2_relocate (struct objfile
*objfile
,
3703 const struct section_offsets
*new_offsets
,
3704 const struct section_offsets
*delta
)
3706 /* There's nothing to relocate here. */
3710 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
3711 const char *func_name
)
3713 struct mapped_index
*index
;
3715 dw2_setup (objfile
);
3717 index
= dwarf2_per_objfile
->index_table
;
3719 /* index is NULL if OBJF_READNOW. */
3722 struct dw2_symtab_iterator iter
;
3723 struct dwarf2_per_cu_data
*per_cu
;
3725 /* Note: It doesn't matter what we pass for block_index here. */
3726 dw2_symtab_iter_init (&iter
, index
, 0, GLOBAL_BLOCK
, VAR_DOMAIN
,
3729 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3730 dw2_instantiate_symtab (per_cu
);
3735 dw2_expand_all_symtabs (struct objfile
*objfile
)
3739 dw2_setup (objfile
);
3741 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3742 + dwarf2_per_objfile
->n_type_units
); ++i
)
3744 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3746 dw2_instantiate_symtab (per_cu
);
3751 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
3752 const char *fullname
)
3756 dw2_setup (objfile
);
3758 /* We don't need to consider type units here.
3759 This is only called for examining code, e.g. expand_line_sal.
3760 There can be an order of magnitude (or more) more type units
3761 than comp units, and we avoid them if we can. */
3763 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3766 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3767 struct quick_file_names
*file_data
;
3769 /* We only need to look at symtabs not already expanded. */
3770 if (per_cu
->v
.quick
->symtab
)
3773 file_data
= dw2_get_file_names (per_cu
);
3774 if (file_data
== NULL
)
3777 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3779 const char *this_fullname
= file_data
->file_names
[j
];
3781 if (filename_cmp (this_fullname
, fullname
) == 0)
3783 dw2_instantiate_symtab (per_cu
);
3791 dw2_map_matching_symbols (struct objfile
*objfile
,
3792 const char * name
, domain_enum
namespace,
3794 int (*callback
) (struct block
*,
3795 struct symbol
*, void *),
3796 void *data
, symbol_compare_ftype
*match
,
3797 symbol_compare_ftype
*ordered_compare
)
3799 /* Currently unimplemented; used for Ada. The function can be called if the
3800 current language is Ada for a non-Ada objfile using GNU index. As Ada
3801 does not look for non-Ada symbols this function should just return. */
3805 dw2_expand_symtabs_matching
3806 (struct objfile
*objfile
,
3807 expand_symtabs_file_matcher_ftype
*file_matcher
,
3808 expand_symtabs_symbol_matcher_ftype
*symbol_matcher
,
3809 enum search_domain kind
,
3814 struct mapped_index
*index
;
3816 dw2_setup (objfile
);
3818 /* index_table is NULL if OBJF_READNOW. */
3819 if (!dwarf2_per_objfile
->index_table
)
3821 index
= dwarf2_per_objfile
->index_table
;
3823 if (file_matcher
!= NULL
)
3825 struct cleanup
*cleanup
;
3826 htab_t visited_found
, visited_not_found
;
3828 visited_found
= htab_create_alloc (10,
3829 htab_hash_pointer
, htab_eq_pointer
,
3830 NULL
, xcalloc
, xfree
);
3831 cleanup
= make_cleanup_htab_delete (visited_found
);
3832 visited_not_found
= htab_create_alloc (10,
3833 htab_hash_pointer
, htab_eq_pointer
,
3834 NULL
, xcalloc
, xfree
);
3835 make_cleanup_htab_delete (visited_not_found
);
3837 /* The rule is CUs specify all the files, including those used by
3838 any TU, so there's no need to scan TUs here. */
3840 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3843 struct dwarf2_per_cu_data
*per_cu
= dw2_get_primary_cu (i
);
3844 struct quick_file_names
*file_data
;
3847 per_cu
->v
.quick
->mark
= 0;
3849 /* We only need to look at symtabs not already expanded. */
3850 if (per_cu
->v
.quick
->symtab
)
3853 file_data
= dw2_get_file_names (per_cu
);
3854 if (file_data
== NULL
)
3857 if (htab_find (visited_not_found
, file_data
) != NULL
)
3859 else if (htab_find (visited_found
, file_data
) != NULL
)
3861 per_cu
->v
.quick
->mark
= 1;
3865 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3867 const char *this_real_name
;
3869 if (file_matcher (file_data
->file_names
[j
], data
, 0))
3871 per_cu
->v
.quick
->mark
= 1;
3875 /* Before we invoke realpath, which can get expensive when many
3876 files are involved, do a quick comparison of the basenames. */
3877 if (!basenames_may_differ
3878 && !file_matcher (lbasename (file_data
->file_names
[j
]),
3882 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3883 if (file_matcher (this_real_name
, data
, 0))
3885 per_cu
->v
.quick
->mark
= 1;
3890 slot
= htab_find_slot (per_cu
->v
.quick
->mark
3892 : visited_not_found
,
3897 do_cleanups (cleanup
);
3900 for (iter
= 0; iter
< index
->symbol_table_slots
; ++iter
)
3902 offset_type idx
= 2 * iter
;
3904 offset_type
*vec
, vec_len
, vec_idx
;
3905 int global_seen
= 0;
3907 if (index
->symbol_table
[idx
] == 0 && index
->symbol_table
[idx
+ 1] == 0)
3910 name
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[idx
]);
3912 if (! (*symbol_matcher
) (name
, data
))
3915 /* The name was matched, now expand corresponding CUs that were
3917 vec
= (offset_type
*) (index
->constant_pool
3918 + MAYBE_SWAP (index
->symbol_table
[idx
+ 1]));
3919 vec_len
= MAYBE_SWAP (vec
[0]);
3920 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
3922 struct dwarf2_per_cu_data
*per_cu
;
3923 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
3924 /* This value is only valid for index versions >= 7. */
3925 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3926 gdb_index_symbol_kind symbol_kind
=
3927 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3928 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3929 /* Only check the symbol attributes if they're present.
3930 Indices prior to version 7 don't record them,
3931 and indices >= 7 may elide them for certain symbols
3932 (gold does this). */
3934 (index
->version
>= 7
3935 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3937 /* Work around gold/15646. */
3940 if (!is_static
&& global_seen
)
3946 /* Only check the symbol's kind if it has one. */
3951 case VARIABLES_DOMAIN
:
3952 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
3955 case FUNCTIONS_DOMAIN
:
3956 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
3960 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3968 /* Don't crash on bad data. */
3969 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
3970 + dwarf2_per_objfile
->n_type_units
))
3972 complaint (&symfile_complaints
,
3973 _(".gdb_index entry has bad CU index"
3974 " [in module %s]"), objfile_name (objfile
));
3978 per_cu
= dw2_get_cu (cu_index
);
3979 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
3980 dw2_instantiate_symtab (per_cu
);
3985 /* A helper for dw2_find_pc_sect_symtab which finds the most specific
3988 static struct symtab
*
3989 recursively_find_pc_sect_symtab (struct symtab
*symtab
, CORE_ADDR pc
)
3993 if (BLOCKVECTOR (symtab
) != NULL
3994 && blockvector_contains_pc (BLOCKVECTOR (symtab
), pc
))
3997 if (symtab
->includes
== NULL
)
4000 for (i
= 0; symtab
->includes
[i
]; ++i
)
4002 struct symtab
*s
= symtab
->includes
[i
];
4004 s
= recursively_find_pc_sect_symtab (s
, pc
);
4012 static struct symtab
*
4013 dw2_find_pc_sect_symtab (struct objfile
*objfile
,
4014 struct bound_minimal_symbol msymbol
,
4016 struct obj_section
*section
,
4019 struct dwarf2_per_cu_data
*data
;
4020 struct symtab
*result
;
4022 dw2_setup (objfile
);
4024 if (!objfile
->psymtabs_addrmap
)
4027 data
= addrmap_find (objfile
->psymtabs_addrmap
, pc
);
4031 if (warn_if_readin
&& data
->v
.quick
->symtab
)
4032 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
4033 paddress (get_objfile_arch (objfile
), pc
));
4035 result
= recursively_find_pc_sect_symtab (dw2_instantiate_symtab (data
), pc
);
4036 gdb_assert (result
!= NULL
);
4041 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
4042 void *data
, int need_fullname
)
4045 struct cleanup
*cleanup
;
4046 htab_t visited
= htab_create_alloc (10, htab_hash_pointer
, htab_eq_pointer
,
4047 NULL
, xcalloc
, xfree
);
4049 cleanup
= make_cleanup_htab_delete (visited
);
4050 dw2_setup (objfile
);
4052 /* The rule is CUs specify all the files, including those used by
4053 any TU, so there's no need to scan TUs here.
4054 We can ignore file names coming from already-expanded CUs. */
4056 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4058 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
4060 if (per_cu
->v
.quick
->symtab
)
4062 void **slot
= htab_find_slot (visited
, per_cu
->v
.quick
->file_names
,
4065 *slot
= per_cu
->v
.quick
->file_names
;
4069 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4072 struct dwarf2_per_cu_data
*per_cu
= dw2_get_primary_cu (i
);
4073 struct quick_file_names
*file_data
;
4076 /* We only need to look at symtabs not already expanded. */
4077 if (per_cu
->v
.quick
->symtab
)
4080 file_data
= dw2_get_file_names (per_cu
);
4081 if (file_data
== NULL
)
4084 slot
= htab_find_slot (visited
, file_data
, INSERT
);
4087 /* Already visited. */
4092 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
4094 const char *this_real_name
;
4097 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
4099 this_real_name
= NULL
;
4100 (*fun
) (file_data
->file_names
[j
], this_real_name
, data
);
4104 do_cleanups (cleanup
);
4108 dw2_has_symbols (struct objfile
*objfile
)
4113 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
4116 dw2_find_last_source_symtab
,
4117 dw2_forget_cached_source_info
,
4118 dw2_map_symtabs_matching_filename
,
4123 dw2_expand_symtabs_for_function
,
4124 dw2_expand_all_symtabs
,
4125 dw2_expand_symtabs_with_fullname
,
4126 dw2_map_matching_symbols
,
4127 dw2_expand_symtabs_matching
,
4128 dw2_find_pc_sect_symtab
,
4129 dw2_map_symbol_filenames
4132 /* Initialize for reading DWARF for this objfile. Return 0 if this
4133 file will use psymtabs, or 1 if using the GNU index. */
4136 dwarf2_initialize_objfile (struct objfile
*objfile
)
4138 /* If we're about to read full symbols, don't bother with the
4139 indices. In this case we also don't care if some other debug
4140 format is making psymtabs, because they are all about to be
4142 if ((objfile
->flags
& OBJF_READNOW
))
4146 dwarf2_per_objfile
->using_index
= 1;
4147 create_all_comp_units (objfile
);
4148 create_all_type_units (objfile
);
4149 dwarf2_per_objfile
->quick_file_names_table
=
4150 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
4152 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
4153 + dwarf2_per_objfile
->n_type_units
); ++i
)
4155 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
4157 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4158 struct dwarf2_per_cu_quick_data
);
4161 /* Return 1 so that gdb sees the "quick" functions. However,
4162 these functions will be no-ops because we will have expanded
4167 if (dwarf2_read_index (objfile
))
4175 /* Build a partial symbol table. */
4178 dwarf2_build_psymtabs (struct objfile
*objfile
)
4180 volatile struct gdb_exception except
;
4182 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
4184 init_psymbol_list (objfile
, 1024);
4187 TRY_CATCH (except
, RETURN_MASK_ERROR
)
4189 /* This isn't really ideal: all the data we allocate on the
4190 objfile's obstack is still uselessly kept around. However,
4191 freeing it seems unsafe. */
4192 struct cleanup
*cleanups
= make_cleanup_discard_psymtabs (objfile
);
4194 dwarf2_build_psymtabs_hard (objfile
);
4195 discard_cleanups (cleanups
);
4197 if (except
.reason
< 0)
4198 exception_print (gdb_stderr
, except
);
4201 /* Return the total length of the CU described by HEADER. */
4204 get_cu_length (const struct comp_unit_head
*header
)
4206 return header
->initial_length_size
+ header
->length
;
4209 /* Return TRUE if OFFSET is within CU_HEADER. */
4212 offset_in_cu_p (const struct comp_unit_head
*cu_header
, sect_offset offset
)
4214 sect_offset bottom
= { cu_header
->offset
.sect_off
};
4215 sect_offset top
= { cu_header
->offset
.sect_off
+ get_cu_length (cu_header
) };
4217 return (offset
.sect_off
>= bottom
.sect_off
&& offset
.sect_off
< top
.sect_off
);
4220 /* Find the base address of the compilation unit for range lists and
4221 location lists. It will normally be specified by DW_AT_low_pc.
4222 In DWARF-3 draft 4, the base address could be overridden by
4223 DW_AT_entry_pc. It's been removed, but GCC still uses this for
4224 compilation units with discontinuous ranges. */
4227 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
4229 struct attribute
*attr
;
4232 cu
->base_address
= 0;
4234 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
4237 cu
->base_address
= attr_value_as_address (attr
);
4242 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4245 cu
->base_address
= attr_value_as_address (attr
);
4251 /* Read in the comp unit header information from the debug_info at info_ptr.
4252 NOTE: This leaves members offset, first_die_offset to be filled in
4255 static const gdb_byte
*
4256 read_comp_unit_head (struct comp_unit_head
*cu_header
,
4257 const gdb_byte
*info_ptr
, bfd
*abfd
)
4260 unsigned int bytes_read
;
4262 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
4263 cu_header
->initial_length_size
= bytes_read
;
4264 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
4265 info_ptr
+= bytes_read
;
4266 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
4268 cu_header
->abbrev_offset
.sect_off
= read_offset (abfd
, info_ptr
, cu_header
,
4270 info_ptr
+= bytes_read
;
4271 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
4273 signed_addr
= bfd_get_sign_extend_vma (abfd
);
4274 if (signed_addr
< 0)
4275 internal_error (__FILE__
, __LINE__
,
4276 _("read_comp_unit_head: dwarf from non elf file"));
4277 cu_header
->signed_addr_p
= signed_addr
;
4282 /* Helper function that returns the proper abbrev section for
4285 static struct dwarf2_section_info
*
4286 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
4288 struct dwarf2_section_info
*abbrev
;
4290 if (this_cu
->is_dwz
)
4291 abbrev
= &dwarf2_get_dwz_file ()->abbrev
;
4293 abbrev
= &dwarf2_per_objfile
->abbrev
;
4298 /* Subroutine of read_and_check_comp_unit_head and
4299 read_and_check_type_unit_head to simplify them.
4300 Perform various error checking on the header. */
4303 error_check_comp_unit_head (struct comp_unit_head
*header
,
4304 struct dwarf2_section_info
*section
,
4305 struct dwarf2_section_info
*abbrev_section
)
4307 bfd
*abfd
= get_section_bfd_owner (section
);
4308 const char *filename
= get_section_file_name (section
);
4310 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
4311 error (_("Dwarf Error: wrong version in compilation unit header "
4312 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
4315 if (header
->abbrev_offset
.sect_off
4316 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
4317 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
4318 "(offset 0x%lx + 6) [in module %s]"),
4319 (long) header
->abbrev_offset
.sect_off
, (long) header
->offset
.sect_off
,
4322 /* Cast to unsigned long to use 64-bit arithmetic when possible to
4323 avoid potential 32-bit overflow. */
4324 if (((unsigned long) header
->offset
.sect_off
+ get_cu_length (header
))
4326 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
4327 "(offset 0x%lx + 0) [in module %s]"),
4328 (long) header
->length
, (long) header
->offset
.sect_off
,
4332 /* Read in a CU/TU header and perform some basic error checking.
4333 The contents of the header are stored in HEADER.
4334 The result is a pointer to the start of the first DIE. */
4336 static const gdb_byte
*
4337 read_and_check_comp_unit_head (struct comp_unit_head
*header
,
4338 struct dwarf2_section_info
*section
,
4339 struct dwarf2_section_info
*abbrev_section
,
4340 const gdb_byte
*info_ptr
,
4341 int is_debug_types_section
)
4343 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
4344 bfd
*abfd
= get_section_bfd_owner (section
);
4346 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4348 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
4350 /* If we're reading a type unit, skip over the signature and
4351 type_offset fields. */
4352 if (is_debug_types_section
)
4353 info_ptr
+= 8 /*signature*/ + header
->offset_size
;
4355 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4357 error_check_comp_unit_head (header
, section
, abbrev_section
);
4362 /* Read in the types comp unit header information from .debug_types entry at
4363 types_ptr. The result is a pointer to one past the end of the header. */
4365 static const gdb_byte
*
4366 read_and_check_type_unit_head (struct comp_unit_head
*header
,
4367 struct dwarf2_section_info
*section
,
4368 struct dwarf2_section_info
*abbrev_section
,
4369 const gdb_byte
*info_ptr
,
4370 ULONGEST
*signature
,
4371 cu_offset
*type_offset_in_tu
)
4373 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
4374 bfd
*abfd
= get_section_bfd_owner (section
);
4376 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4378 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
4380 /* If we're reading a type unit, skip over the signature and
4381 type_offset fields. */
4382 if (signature
!= NULL
)
4383 *signature
= read_8_bytes (abfd
, info_ptr
);
4385 if (type_offset_in_tu
!= NULL
)
4386 type_offset_in_tu
->cu_off
= read_offset_1 (abfd
, info_ptr
,
4387 header
->offset_size
);
4388 info_ptr
+= header
->offset_size
;
4390 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4392 error_check_comp_unit_head (header
, section
, abbrev_section
);
4397 /* Fetch the abbreviation table offset from a comp or type unit header. */
4400 read_abbrev_offset (struct dwarf2_section_info
*section
,
4403 bfd
*abfd
= get_section_bfd_owner (section
);
4404 const gdb_byte
*info_ptr
;
4405 unsigned int length
, initial_length_size
, offset_size
;
4406 sect_offset abbrev_offset
;
4408 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
4409 info_ptr
= section
->buffer
+ offset
.sect_off
;
4410 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
4411 offset_size
= initial_length_size
== 4 ? 4 : 8;
4412 info_ptr
+= initial_length_size
+ 2 /*version*/;
4413 abbrev_offset
.sect_off
= read_offset_1 (abfd
, info_ptr
, offset_size
);
4414 return abbrev_offset
;
4417 /* Allocate a new partial symtab for file named NAME and mark this new
4418 partial symtab as being an include of PST. */
4421 dwarf2_create_include_psymtab (const char *name
, struct partial_symtab
*pst
,
4422 struct objfile
*objfile
)
4424 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
4426 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
4428 /* It shares objfile->objfile_obstack. */
4429 subpst
->dirname
= pst
->dirname
;
4432 subpst
->section_offsets
= pst
->section_offsets
;
4433 subpst
->textlow
= 0;
4434 subpst
->texthigh
= 0;
4436 subpst
->dependencies
= (struct partial_symtab
**)
4437 obstack_alloc (&objfile
->objfile_obstack
,
4438 sizeof (struct partial_symtab
*));
4439 subpst
->dependencies
[0] = pst
;
4440 subpst
->number_of_dependencies
= 1;
4442 subpst
->globals_offset
= 0;
4443 subpst
->n_global_syms
= 0;
4444 subpst
->statics_offset
= 0;
4445 subpst
->n_static_syms
= 0;
4446 subpst
->symtab
= NULL
;
4447 subpst
->read_symtab
= pst
->read_symtab
;
4450 /* No private part is necessary for include psymtabs. This property
4451 can be used to differentiate between such include psymtabs and
4452 the regular ones. */
4453 subpst
->read_symtab_private
= NULL
;
4456 /* Read the Line Number Program data and extract the list of files
4457 included by the source file represented by PST. Build an include
4458 partial symtab for each of these included files. */
4461 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
4462 struct die_info
*die
,
4463 struct partial_symtab
*pst
)
4465 struct line_header
*lh
= NULL
;
4466 struct attribute
*attr
;
4468 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
4470 lh
= dwarf_decode_line_header (DW_UNSND (attr
), cu
);
4472 return; /* No linetable, so no includes. */
4474 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
4475 dwarf_decode_lines (lh
, pst
->dirname
, cu
, pst
, 1);
4477 free_line_header (lh
);
4481 hash_signatured_type (const void *item
)
4483 const struct signatured_type
*sig_type
= item
;
4485 /* This drops the top 32 bits of the signature, but is ok for a hash. */
4486 return sig_type
->signature
;
4490 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
4492 const struct signatured_type
*lhs
= item_lhs
;
4493 const struct signatured_type
*rhs
= item_rhs
;
4495 return lhs
->signature
== rhs
->signature
;
4498 /* Allocate a hash table for signatured types. */
4501 allocate_signatured_type_table (struct objfile
*objfile
)
4503 return htab_create_alloc_ex (41,
4504 hash_signatured_type
,
4507 &objfile
->objfile_obstack
,
4508 hashtab_obstack_allocate
,
4509 dummy_obstack_deallocate
);
4512 /* A helper function to add a signatured type CU to a table. */
4515 add_signatured_type_cu_to_table (void **slot
, void *datum
)
4517 struct signatured_type
*sigt
= *slot
;
4518 struct signatured_type
***datap
= datum
;
4526 /* Create the hash table of all entries in the .debug_types
4527 (or .debug_types.dwo) section(s).
4528 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
4529 otherwise it is NULL.
4531 The result is a pointer to the hash table or NULL if there are no types.
4533 Note: This function processes DWO files only, not DWP files. */
4536 create_debug_types_hash_table (struct dwo_file
*dwo_file
,
4537 VEC (dwarf2_section_info_def
) *types
)
4539 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4540 htab_t types_htab
= NULL
;
4542 struct dwarf2_section_info
*section
;
4543 struct dwarf2_section_info
*abbrev_section
;
4545 if (VEC_empty (dwarf2_section_info_def
, types
))
4548 abbrev_section
= (dwo_file
!= NULL
4549 ? &dwo_file
->sections
.abbrev
4550 : &dwarf2_per_objfile
->abbrev
);
4552 if (dwarf2_read_debug
)
4553 fprintf_unfiltered (gdb_stdlog
, "Reading .debug_types%s for %s:\n",
4554 dwo_file
? ".dwo" : "",
4555 get_section_file_name (abbrev_section
));
4558 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
4562 const gdb_byte
*info_ptr
, *end_ptr
;
4564 dwarf2_read_section (objfile
, section
);
4565 info_ptr
= section
->buffer
;
4567 if (info_ptr
== NULL
)
4570 /* We can't set abfd until now because the section may be empty or
4571 not present, in which case the bfd is unknown. */
4572 abfd
= get_section_bfd_owner (section
);
4574 /* We don't use init_cutu_and_read_dies_simple, or some such, here
4575 because we don't need to read any dies: the signature is in the
4578 end_ptr
= info_ptr
+ section
->size
;
4579 while (info_ptr
< end_ptr
)
4582 cu_offset type_offset_in_tu
;
4584 struct signatured_type
*sig_type
;
4585 struct dwo_unit
*dwo_tu
;
4587 const gdb_byte
*ptr
= info_ptr
;
4588 struct comp_unit_head header
;
4589 unsigned int length
;
4591 offset
.sect_off
= ptr
- section
->buffer
;
4593 /* We need to read the type's signature in order to build the hash
4594 table, but we don't need anything else just yet. */
4596 ptr
= read_and_check_type_unit_head (&header
, section
,
4597 abbrev_section
, ptr
,
4598 &signature
, &type_offset_in_tu
);
4600 length
= get_cu_length (&header
);
4602 /* Skip dummy type units. */
4603 if (ptr
>= info_ptr
+ length
4604 || peek_abbrev_code (abfd
, ptr
) == 0)
4610 if (types_htab
== NULL
)
4613 types_htab
= allocate_dwo_unit_table (objfile
);
4615 types_htab
= allocate_signatured_type_table (objfile
);
4621 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4623 dwo_tu
->dwo_file
= dwo_file
;
4624 dwo_tu
->signature
= signature
;
4625 dwo_tu
->type_offset_in_tu
= type_offset_in_tu
;
4626 dwo_tu
->section
= section
;
4627 dwo_tu
->offset
= offset
;
4628 dwo_tu
->length
= length
;
4632 /* N.B.: type_offset is not usable if this type uses a DWO file.
4633 The real type_offset is in the DWO file. */
4635 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4636 struct signatured_type
);
4637 sig_type
->signature
= signature
;
4638 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
4639 sig_type
->per_cu
.objfile
= objfile
;
4640 sig_type
->per_cu
.is_debug_types
= 1;
4641 sig_type
->per_cu
.section
= section
;
4642 sig_type
->per_cu
.offset
= offset
;
4643 sig_type
->per_cu
.length
= length
;
4646 slot
= htab_find_slot (types_htab
,
4647 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
4649 gdb_assert (slot
!= NULL
);
4652 sect_offset dup_offset
;
4656 const struct dwo_unit
*dup_tu
= *slot
;
4658 dup_offset
= dup_tu
->offset
;
4662 const struct signatured_type
*dup_tu
= *slot
;
4664 dup_offset
= dup_tu
->per_cu
.offset
;
4667 complaint (&symfile_complaints
,
4668 _("debug type entry at offset 0x%x is duplicate to"
4669 " the entry at offset 0x%x, signature %s"),
4670 offset
.sect_off
, dup_offset
.sect_off
,
4671 hex_string (signature
));
4673 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
4675 if (dwarf2_read_debug
> 1)
4676 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature %s\n",
4678 hex_string (signature
));
4687 /* Create the hash table of all entries in the .debug_types section,
4688 and initialize all_type_units.
4689 The result is zero if there is an error (e.g. missing .debug_types section),
4690 otherwise non-zero. */
4693 create_all_type_units (struct objfile
*objfile
)
4696 struct signatured_type
**iter
;
4698 types_htab
= create_debug_types_hash_table (NULL
, dwarf2_per_objfile
->types
);
4699 if (types_htab
== NULL
)
4701 dwarf2_per_objfile
->signatured_types
= NULL
;
4705 dwarf2_per_objfile
->signatured_types
= types_htab
;
4707 dwarf2_per_objfile
->n_type_units
= htab_elements (types_htab
);
4708 dwarf2_per_objfile
->all_type_units
4709 = xmalloc (dwarf2_per_objfile
->n_type_units
4710 * sizeof (struct signatured_type
*));
4711 iter
= &dwarf2_per_objfile
->all_type_units
[0];
4712 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
4713 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
4714 == dwarf2_per_objfile
->n_type_units
);
4719 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
4720 Fill in SIG_ENTRY with DWO_ENTRY. */
4723 fill_in_sig_entry_from_dwo_entry (struct objfile
*objfile
,
4724 struct signatured_type
*sig_entry
,
4725 struct dwo_unit
*dwo_entry
)
4727 /* Make sure we're not clobbering something we don't expect to. */
4728 gdb_assert (! sig_entry
->per_cu
.queued
);
4729 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
4730 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
4731 gdb_assert (sig_entry
->per_cu
.v
.quick
->symtab
== NULL
);
4732 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
4733 gdb_assert (sig_entry
->type_offset_in_section
.sect_off
== 0);
4734 gdb_assert (sig_entry
->type_unit_group
== NULL
);
4735 gdb_assert (sig_entry
->dwo_unit
== NULL
);
4737 sig_entry
->per_cu
.section
= dwo_entry
->section
;
4738 sig_entry
->per_cu
.offset
= dwo_entry
->offset
;
4739 sig_entry
->per_cu
.length
= dwo_entry
->length
;
4740 sig_entry
->per_cu
.reading_dwo_directly
= 1;
4741 sig_entry
->per_cu
.objfile
= objfile
;
4742 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
4743 sig_entry
->dwo_unit
= dwo_entry
;
4746 /* Subroutine of lookup_signatured_type.
4747 If we haven't read the TU yet, create the signatured_type data structure
4748 for a TU to be read in directly from a DWO file, bypassing the stub.
4749 This is the "Stay in DWO Optimization": When there is no DWP file and we're
4750 using .gdb_index, then when reading a CU we want to stay in the DWO file
4751 containing that CU. Otherwise we could end up reading several other DWO
4752 files (due to comdat folding) to process the transitive closure of all the
4753 mentioned TUs, and that can be slow. The current DWO file will have every
4754 type signature that it needs.
4755 We only do this for .gdb_index because in the psymtab case we already have
4756 to read all the DWOs to build the type unit groups. */
4758 static struct signatured_type
*
4759 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4761 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4762 struct dwo_file
*dwo_file
;
4763 struct dwo_unit find_dwo_entry
, *dwo_entry
;
4764 struct signatured_type find_sig_entry
, *sig_entry
;
4766 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
4768 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
4769 dwo_unit of the TU itself. */
4770 dwo_file
= cu
->dwo_unit
->dwo_file
;
4772 /* We only ever need to read in one copy of a signatured type.
4773 Just use the global signatured_types array. If this is the first time
4774 we're reading this type, replace the recorded data from .gdb_index with
4777 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4779 find_sig_entry
.signature
= sig
;
4780 sig_entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_sig_entry
);
4781 if (sig_entry
== NULL
)
4784 /* We can get here with the TU already read, *or* in the process of being
4785 read. Don't reassign it if that's the case. Also note that if the TU is
4786 already being read, it may not have come from a DWO, the program may be
4787 a mix of Fission-compiled code and non-Fission-compiled code. */
4788 /* Have we already tried to read this TU? */
4789 if (sig_entry
->per_cu
.tu_read
)
4792 /* Ok, this is the first time we're reading this TU. */
4793 if (dwo_file
->tus
== NULL
)
4795 find_dwo_entry
.signature
= sig
;
4796 dwo_entry
= htab_find (dwo_file
->tus
, &find_dwo_entry
);
4797 if (dwo_entry
== NULL
)
4800 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
4801 sig_entry
->per_cu
.tu_read
= 1;
4805 /* Subroutine of lookup_dwp_signatured_type.
4806 Add an entry for signature SIG to dwarf2_per_objfile->signatured_types. */
4808 static struct signatured_type
*
4809 add_type_unit (ULONGEST sig
)
4811 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4812 int n_type_units
= dwarf2_per_objfile
->n_type_units
;
4813 struct signatured_type
*sig_type
;
4817 dwarf2_per_objfile
->all_type_units
=
4818 xrealloc (dwarf2_per_objfile
->all_type_units
,
4819 n_type_units
* sizeof (struct signatured_type
*));
4820 dwarf2_per_objfile
->n_type_units
= n_type_units
;
4821 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4822 struct signatured_type
);
4823 dwarf2_per_objfile
->all_type_units
[n_type_units
- 1] = sig_type
;
4824 sig_type
->signature
= sig
;
4825 sig_type
->per_cu
.is_debug_types
= 1;
4826 sig_type
->per_cu
.v
.quick
=
4827 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4828 struct dwarf2_per_cu_quick_data
);
4829 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4831 gdb_assert (*slot
== NULL
);
4833 /* The rest of sig_type must be filled in by the caller. */
4837 /* Subroutine of lookup_signatured_type.
4838 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
4839 then try the DWP file.
4840 Normally this "can't happen", but if there's a bug in signature
4841 generation and/or the DWP file is built incorrectly, it can happen.
4842 Using the type directly from the DWP file means we don't have the stub
4843 which has some useful attributes (e.g., DW_AT_comp_dir), but they're
4844 not critical. [Eventually the stub may go away for type units anyway.] */
4846 static struct signatured_type
*
4847 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4849 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4850 struct dwp_file
*dwp_file
= get_dwp_file ();
4851 struct dwo_unit
*dwo_entry
;
4852 struct signatured_type find_sig_entry
, *sig_entry
;
4854 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
4855 gdb_assert (dwp_file
!= NULL
);
4857 if (dwarf2_per_objfile
->signatured_types
!= NULL
)
4859 find_sig_entry
.signature
= sig
;
4860 sig_entry
= htab_find (dwarf2_per_objfile
->signatured_types
,
4862 if (sig_entry
!= NULL
)
4866 /* This is the "shouldn't happen" case.
4867 Try the DWP file and hope for the best. */
4868 if (dwp_file
->tus
== NULL
)
4870 dwo_entry
= lookup_dwo_unit_in_dwp (dwp_file
, NULL
,
4871 sig
, 1 /* is_debug_types */);
4872 if (dwo_entry
== NULL
)
4875 sig_entry
= add_type_unit (sig
);
4876 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
4878 /* The caller will signal a complaint if we return NULL.
4879 Here we don't return NULL but we still want to complain. */
4880 complaint (&symfile_complaints
,
4881 _("Bad type signature %s referenced by %s at 0x%x,"
4882 " coping by using copy in DWP [in module %s]"),
4884 cu
->per_cu
->is_debug_types
? "TU" : "CU",
4885 cu
->per_cu
->offset
.sect_off
,
4886 objfile_name (objfile
));
4891 /* Lookup a signature based type for DW_FORM_ref_sig8.
4892 Returns NULL if signature SIG is not present in the table.
4893 It is up to the caller to complain about this. */
4895 static struct signatured_type
*
4896 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4899 && dwarf2_per_objfile
->using_index
)
4901 /* We're in a DWO/DWP file, and we're using .gdb_index.
4902 These cases require special processing. */
4903 if (get_dwp_file () == NULL
)
4904 return lookup_dwo_signatured_type (cu
, sig
);
4906 return lookup_dwp_signatured_type (cu
, sig
);
4910 struct signatured_type find_entry
, *entry
;
4912 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4914 find_entry
.signature
= sig
;
4915 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
4920 /* Low level DIE reading support. */
4922 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
4925 init_cu_die_reader (struct die_reader_specs
*reader
,
4926 struct dwarf2_cu
*cu
,
4927 struct dwarf2_section_info
*section
,
4928 struct dwo_file
*dwo_file
)
4930 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
4931 reader
->abfd
= get_section_bfd_owner (section
);
4933 reader
->dwo_file
= dwo_file
;
4934 reader
->die_section
= section
;
4935 reader
->buffer
= section
->buffer
;
4936 reader
->buffer_end
= section
->buffer
+ section
->size
;
4937 reader
->comp_dir
= NULL
;
4940 /* Subroutine of init_cutu_and_read_dies to simplify it.
4941 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
4942 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
4945 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
4946 from it to the DIE in the DWO. If NULL we are skipping the stub.
4947 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
4948 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
4949 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
4950 STUB_COMP_DIR may be non-NULL.
4951 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
4952 are filled in with the info of the DIE from the DWO file.
4953 ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies
4954 provided an abbrev table to use.
4955 The result is non-zero if a valid (non-dummy) DIE was found. */
4958 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
4959 struct dwo_unit
*dwo_unit
,
4960 int abbrev_table_provided
,
4961 struct die_info
*stub_comp_unit_die
,
4962 const char *stub_comp_dir
,
4963 struct die_reader_specs
*result_reader
,
4964 const gdb_byte
**result_info_ptr
,
4965 struct die_info
**result_comp_unit_die
,
4966 int *result_has_children
)
4968 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4969 struct dwarf2_cu
*cu
= this_cu
->cu
;
4970 struct dwarf2_section_info
*section
;
4972 const gdb_byte
*begin_info_ptr
, *info_ptr
;
4973 ULONGEST signature
; /* Or dwo_id. */
4974 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
4975 int i
,num_extra_attrs
;
4976 struct dwarf2_section_info
*dwo_abbrev_section
;
4977 struct attribute
*attr
;
4978 struct die_info
*comp_unit_die
;
4980 /* At most one of these may be provided. */
4981 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
4983 /* These attributes aren't processed until later:
4984 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
4985 DW_AT_comp_dir is used now, to find the DWO file, but it is also
4986 referenced later. However, these attributes are found in the stub
4987 which we won't have later. In order to not impose this complication
4988 on the rest of the code, we read them here and copy them to the
4997 if (stub_comp_unit_die
!= NULL
)
4999 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
5001 if (! this_cu
->is_debug_types
)
5002 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
5003 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
5004 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
5005 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
5006 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
5008 /* There should be a DW_AT_addr_base attribute here (if needed).
5009 We need the value before we can process DW_FORM_GNU_addr_index. */
5011 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
5013 cu
->addr_base
= DW_UNSND (attr
);
5015 /* There should be a DW_AT_ranges_base attribute here (if needed).
5016 We need the value before we can process DW_AT_ranges. */
5017 cu
->ranges_base
= 0;
5018 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
5020 cu
->ranges_base
= DW_UNSND (attr
);
5022 else if (stub_comp_dir
!= NULL
)
5024 /* Reconstruct the comp_dir attribute to simplify the code below. */
5025 comp_dir
= (struct attribute
*)
5026 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (*comp_dir
));
5027 comp_dir
->name
= DW_AT_comp_dir
;
5028 comp_dir
->form
= DW_FORM_string
;
5029 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
5030 DW_STRING (comp_dir
) = stub_comp_dir
;
5033 /* Set up for reading the DWO CU/TU. */
5034 cu
->dwo_unit
= dwo_unit
;
5035 section
= dwo_unit
->section
;
5036 dwarf2_read_section (objfile
, section
);
5037 abfd
= get_section_bfd_owner (section
);
5038 begin_info_ptr
= info_ptr
= section
->buffer
+ dwo_unit
->offset
.sect_off
;
5039 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
5040 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
);
5042 if (this_cu
->is_debug_types
)
5044 ULONGEST header_signature
;
5045 cu_offset type_offset_in_tu
;
5046 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
5048 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
5052 &type_offset_in_tu
);
5053 /* This is not an assert because it can be caused by bad debug info. */
5054 if (sig_type
->signature
!= header_signature
)
5056 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
5057 " TU at offset 0x%x [in module %s]"),
5058 hex_string (sig_type
->signature
),
5059 hex_string (header_signature
),
5060 dwo_unit
->offset
.sect_off
,
5061 bfd_get_filename (abfd
));
5063 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5064 /* For DWOs coming from DWP files, we don't know the CU length
5065 nor the type's offset in the TU until now. */
5066 dwo_unit
->length
= get_cu_length (&cu
->header
);
5067 dwo_unit
->type_offset_in_tu
= type_offset_in_tu
;
5069 /* Establish the type offset that can be used to lookup the type.
5070 For DWO files, we don't know it until now. */
5071 sig_type
->type_offset_in_section
.sect_off
=
5072 dwo_unit
->offset
.sect_off
+ dwo_unit
->type_offset_in_tu
.cu_off
;
5076 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5079 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5080 /* For DWOs coming from DWP files, we don't know the CU length
5082 dwo_unit
->length
= get_cu_length (&cu
->header
);
5085 /* Replace the CU's original abbrev table with the DWO's.
5086 Reminder: We can't read the abbrev table until we've read the header. */
5087 if (abbrev_table_provided
)
5089 /* Don't free the provided abbrev table, the caller of
5090 init_cutu_and_read_dies owns it. */
5091 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5092 /* Ensure the DWO abbrev table gets freed. */
5093 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5097 dwarf2_free_abbrev_table (cu
);
5098 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5099 /* Leave any existing abbrev table cleanup as is. */
5102 /* Read in the die, but leave space to copy over the attributes
5103 from the stub. This has the benefit of simplifying the rest of
5104 the code - all the work to maintain the illusion of a single
5105 DW_TAG_{compile,type}_unit DIE is done here. */
5106 num_extra_attrs
= ((stmt_list
!= NULL
)
5110 + (comp_dir
!= NULL
));
5111 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
5112 result_has_children
, num_extra_attrs
);
5114 /* Copy over the attributes from the stub to the DIE we just read in. */
5115 comp_unit_die
= *result_comp_unit_die
;
5116 i
= comp_unit_die
->num_attrs
;
5117 if (stmt_list
!= NULL
)
5118 comp_unit_die
->attrs
[i
++] = *stmt_list
;
5120 comp_unit_die
->attrs
[i
++] = *low_pc
;
5121 if (high_pc
!= NULL
)
5122 comp_unit_die
->attrs
[i
++] = *high_pc
;
5124 comp_unit_die
->attrs
[i
++] = *ranges
;
5125 if (comp_dir
!= NULL
)
5126 comp_unit_die
->attrs
[i
++] = *comp_dir
;
5127 comp_unit_die
->num_attrs
+= num_extra_attrs
;
5129 if (dwarf2_die_debug
)
5131 fprintf_unfiltered (gdb_stdlog
,
5132 "Read die from %s@0x%x of %s:\n",
5133 get_section_name (section
),
5134 (unsigned) (begin_info_ptr
- section
->buffer
),
5135 bfd_get_filename (abfd
));
5136 dump_die (comp_unit_die
, dwarf2_die_debug
);
5139 /* Save the comp_dir attribute. If there is no DWP file then we'll read
5140 TUs by skipping the stub and going directly to the entry in the DWO file.
5141 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
5142 to get it via circuitous means. Blech. */
5143 if (comp_dir
!= NULL
)
5144 result_reader
->comp_dir
= DW_STRING (comp_dir
);
5146 /* Skip dummy compilation units. */
5147 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
5148 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5151 *result_info_ptr
= info_ptr
;
5155 /* Subroutine of init_cutu_and_read_dies to simplify it.
5156 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
5157 Returns NULL if the specified DWO unit cannot be found. */
5159 static struct dwo_unit
*
5160 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
5161 struct die_info
*comp_unit_die
)
5163 struct dwarf2_cu
*cu
= this_cu
->cu
;
5164 struct attribute
*attr
;
5166 struct dwo_unit
*dwo_unit
;
5167 const char *comp_dir
, *dwo_name
;
5169 gdb_assert (cu
!= NULL
);
5171 /* Yeah, we look dwo_name up again, but it simplifies the code. */
5172 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5173 gdb_assert (attr
!= NULL
);
5174 dwo_name
= DW_STRING (attr
);
5176 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
5178 comp_dir
= DW_STRING (attr
);
5180 if (this_cu
->is_debug_types
)
5182 struct signatured_type
*sig_type
;
5184 /* Since this_cu is the first member of struct signatured_type,
5185 we can go from a pointer to one to a pointer to the other. */
5186 sig_type
= (struct signatured_type
*) this_cu
;
5187 signature
= sig_type
->signature
;
5188 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
5192 struct attribute
*attr
;
5194 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
5196 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
5198 dwo_name
, objfile_name (this_cu
->objfile
));
5199 signature
= DW_UNSND (attr
);
5200 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
5207 /* Subroutine of init_cutu_and_read_dies to simplify it.
5208 Read a TU directly from a DWO file, bypassing the stub. */
5211 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
, int keep
,
5212 die_reader_func_ftype
*die_reader_func
,
5215 struct dwarf2_cu
*cu
;
5216 struct signatured_type
*sig_type
;
5217 struct cleanup
*cleanups
, *free_cu_cleanup
;
5218 struct die_reader_specs reader
;
5219 const gdb_byte
*info_ptr
;
5220 struct die_info
*comp_unit_die
;
5223 /* Verify we can do the following downcast, and that we have the
5225 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
5226 sig_type
= (struct signatured_type
*) this_cu
;
5227 gdb_assert (sig_type
->dwo_unit
!= NULL
);
5229 cleanups
= make_cleanup (null_cleanup
, NULL
);
5231 gdb_assert (this_cu
->cu
== NULL
);
5232 cu
= xmalloc (sizeof (*cu
));
5233 init_one_comp_unit (cu
, this_cu
);
5234 /* If an error occurs while loading, release our storage. */
5235 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5237 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
5238 0 /* abbrev_table_provided */,
5239 NULL
/* stub_comp_unit_die */,
5240 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
5242 &comp_unit_die
, &has_children
) == 0)
5245 do_cleanups (cleanups
);
5249 /* All the "real" work is done here. */
5250 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5252 /* This duplicates some code in init_cutu_and_read_dies,
5253 but the alternative is making the latter more complex.
5254 This function is only for the special case of using DWO files directly:
5255 no point in overly complicating the general case just to handle this. */
5258 /* We've successfully allocated this compilation unit. Let our
5259 caller clean it up when finished with it. */
5260 discard_cleanups (free_cu_cleanup
);
5262 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5263 So we have to manually free the abbrev table. */
5264 dwarf2_free_abbrev_table (cu
);
5266 /* Link this CU into read_in_chain. */
5267 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5268 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5271 do_cleanups (free_cu_cleanup
);
5273 do_cleanups (cleanups
);
5276 /* Initialize a CU (or TU) and read its DIEs.
5277 If the CU defers to a DWO file, read the DWO file as well.
5279 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
5280 Otherwise the table specified in the comp unit header is read in and used.
5281 This is an optimization for when we already have the abbrev table.
5283 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
5284 Otherwise, a new CU is allocated with xmalloc.
5286 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
5287 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
5289 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5290 linker) then DIE_READER_FUNC will not get called. */
5293 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
5294 struct abbrev_table
*abbrev_table
,
5295 int use_existing_cu
, int keep
,
5296 die_reader_func_ftype
*die_reader_func
,
5299 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5300 struct dwarf2_section_info
*section
= this_cu
->section
;
5301 bfd
*abfd
= get_section_bfd_owner (section
);
5302 struct dwarf2_cu
*cu
;
5303 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5304 struct die_reader_specs reader
;
5305 struct die_info
*comp_unit_die
;
5307 struct attribute
*attr
;
5308 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5309 struct signatured_type
*sig_type
= NULL
;
5310 struct dwarf2_section_info
*abbrev_section
;
5311 /* Non-zero if CU currently points to a DWO file and we need to
5312 reread it. When this happens we need to reread the skeleton die
5313 before we can reread the DWO file (this only applies to CUs, not TUs). */
5314 int rereading_dwo_cu
= 0;
5316 if (dwarf2_die_debug
)
5317 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5318 this_cu
->is_debug_types
? "type" : "comp",
5319 this_cu
->offset
.sect_off
);
5321 if (use_existing_cu
)
5324 /* If we're reading a TU directly from a DWO file, including a virtual DWO
5325 file (instead of going through the stub), short-circuit all of this. */
5326 if (this_cu
->reading_dwo_directly
)
5328 /* Narrow down the scope of possibilities to have to understand. */
5329 gdb_assert (this_cu
->is_debug_types
);
5330 gdb_assert (abbrev_table
== NULL
);
5331 gdb_assert (!use_existing_cu
);
5332 init_tu_and_read_dwo_dies (this_cu
, keep
, die_reader_func
, data
);
5336 cleanups
= make_cleanup (null_cleanup
, NULL
);
5338 /* This is cheap if the section is already read in. */
5339 dwarf2_read_section (objfile
, section
);
5341 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
5343 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
5345 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5349 /* If this CU is from a DWO file we need to start over, we need to
5350 refetch the attributes from the skeleton CU.
5351 This could be optimized by retrieving those attributes from when we
5352 were here the first time: the previous comp_unit_die was stored in
5353 comp_unit_obstack. But there's no data yet that we need this
5355 if (cu
->dwo_unit
!= NULL
)
5356 rereading_dwo_cu
= 1;
5360 /* If !use_existing_cu, this_cu->cu must be NULL. */
5361 gdb_assert (this_cu
->cu
== NULL
);
5363 cu
= xmalloc (sizeof (*cu
));
5364 init_one_comp_unit (cu
, this_cu
);
5366 /* If an error occurs while loading, release our storage. */
5367 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5370 /* Get the header. */
5371 if (cu
->header
.first_die_offset
.cu_off
!= 0 && ! rereading_dwo_cu
)
5373 /* We already have the header, there's no need to read it in again. */
5374 info_ptr
+= cu
->header
.first_die_offset
.cu_off
;
5378 if (this_cu
->is_debug_types
)
5381 cu_offset type_offset_in_tu
;
5383 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
5384 abbrev_section
, info_ptr
,
5386 &type_offset_in_tu
);
5388 /* Since per_cu is the first member of struct signatured_type,
5389 we can go from a pointer to one to a pointer to the other. */
5390 sig_type
= (struct signatured_type
*) this_cu
;
5391 gdb_assert (sig_type
->signature
== signature
);
5392 gdb_assert (sig_type
->type_offset_in_tu
.cu_off
5393 == type_offset_in_tu
.cu_off
);
5394 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5396 /* LENGTH has not been set yet for type units if we're
5397 using .gdb_index. */
5398 this_cu
->length
= get_cu_length (&cu
->header
);
5400 /* Establish the type offset that can be used to lookup the type. */
5401 sig_type
->type_offset_in_section
.sect_off
=
5402 this_cu
->offset
.sect_off
+ sig_type
->type_offset_in_tu
.cu_off
;
5406 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5410 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5411 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
5415 /* Skip dummy compilation units. */
5416 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5417 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5419 do_cleanups (cleanups
);
5423 /* If we don't have them yet, read the abbrevs for this compilation unit.
5424 And if we need to read them now, make sure they're freed when we're
5425 done. Note that it's important that if the CU had an abbrev table
5426 on entry we don't free it when we're done: Somewhere up the call stack
5427 it may be in use. */
5428 if (abbrev_table
!= NULL
)
5430 gdb_assert (cu
->abbrev_table
== NULL
);
5431 gdb_assert (cu
->header
.abbrev_offset
.sect_off
5432 == abbrev_table
->offset
.sect_off
);
5433 cu
->abbrev_table
= abbrev_table
;
5435 else if (cu
->abbrev_table
== NULL
)
5437 dwarf2_read_abbrevs (cu
, abbrev_section
);
5438 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5440 else if (rereading_dwo_cu
)
5442 dwarf2_free_abbrev_table (cu
);
5443 dwarf2_read_abbrevs (cu
, abbrev_section
);
5446 /* Read the top level CU/TU die. */
5447 init_cu_die_reader (&reader
, cu
, section
, NULL
);
5448 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5450 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
5452 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
5453 DWO CU, that this test will fail (the attribute will not be present). */
5454 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5457 struct dwo_unit
*dwo_unit
;
5458 struct die_info
*dwo_comp_unit_die
;
5462 complaint (&symfile_complaints
,
5463 _("compilation unit with DW_AT_GNU_dwo_name"
5464 " has children (offset 0x%x) [in module %s]"),
5465 this_cu
->offset
.sect_off
, bfd_get_filename (abfd
));
5467 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
);
5468 if (dwo_unit
!= NULL
)
5470 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
5471 abbrev_table
!= NULL
,
5472 comp_unit_die
, NULL
,
5474 &dwo_comp_unit_die
, &has_children
) == 0)
5477 do_cleanups (cleanups
);
5480 comp_unit_die
= dwo_comp_unit_die
;
5484 /* Yikes, we couldn't find the rest of the DIE, we only have
5485 the stub. A complaint has already been logged. There's
5486 not much more we can do except pass on the stub DIE to
5487 die_reader_func. We don't want to throw an error on bad
5492 /* All of the above is setup for this call. Yikes. */
5493 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5495 /* Done, clean up. */
5496 if (free_cu_cleanup
!= NULL
)
5500 /* We've successfully allocated this compilation unit. Let our
5501 caller clean it up when finished with it. */
5502 discard_cleanups (free_cu_cleanup
);
5504 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5505 So we have to manually free the abbrev table. */
5506 dwarf2_free_abbrev_table (cu
);
5508 /* Link this CU into read_in_chain. */
5509 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5510 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5513 do_cleanups (free_cu_cleanup
);
5516 do_cleanups (cleanups
);
5519 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present.
5520 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed
5521 to have already done the lookup to find the DWO file).
5523 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
5524 THIS_CU->is_debug_types, but nothing else.
5526 We fill in THIS_CU->length.
5528 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5529 linker) then DIE_READER_FUNC will not get called.
5531 THIS_CU->cu is always freed when done.
5532 This is done in order to not leave THIS_CU->cu in a state where we have
5533 to care whether it refers to the "main" CU or the DWO CU. */
5536 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
5537 struct dwo_file
*dwo_file
,
5538 die_reader_func_ftype
*die_reader_func
,
5541 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5542 struct dwarf2_section_info
*section
= this_cu
->section
;
5543 bfd
*abfd
= get_section_bfd_owner (section
);
5544 struct dwarf2_section_info
*abbrev_section
;
5545 struct dwarf2_cu cu
;
5546 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5547 struct die_reader_specs reader
;
5548 struct cleanup
*cleanups
;
5549 struct die_info
*comp_unit_die
;
5552 if (dwarf2_die_debug
)
5553 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5554 this_cu
->is_debug_types
? "type" : "comp",
5555 this_cu
->offset
.sect_off
);
5557 gdb_assert (this_cu
->cu
== NULL
);
5559 abbrev_section
= (dwo_file
!= NULL
5560 ? &dwo_file
->sections
.abbrev
5561 : get_abbrev_section_for_cu (this_cu
));
5563 /* This is cheap if the section is already read in. */
5564 dwarf2_read_section (objfile
, section
);
5566 init_one_comp_unit (&cu
, this_cu
);
5568 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
5570 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
5571 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, section
,
5572 abbrev_section
, info_ptr
,
5573 this_cu
->is_debug_types
);
5575 this_cu
->length
= get_cu_length (&cu
.header
);
5577 /* Skip dummy compilation units. */
5578 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5579 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5581 do_cleanups (cleanups
);
5585 dwarf2_read_abbrevs (&cu
, abbrev_section
);
5586 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
5588 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
);
5589 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5591 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5593 do_cleanups (cleanups
);
5596 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
5597 does not lookup the specified DWO file.
5598 This cannot be used to read DWO files.
5600 THIS_CU->cu is always freed when done.
5601 This is done in order to not leave THIS_CU->cu in a state where we have
5602 to care whether it refers to the "main" CU or the DWO CU.
5603 We can revisit this if the data shows there's a performance issue. */
5606 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
5607 die_reader_func_ftype
*die_reader_func
,
5610 init_cutu_and_read_dies_no_follow (this_cu
, NULL
, die_reader_func
, data
);
5613 /* Type Unit Groups.
5615 Type Unit Groups are a way to collapse the set of all TUs (type units) into
5616 a more manageable set. The grouping is done by DW_AT_stmt_list entry
5617 so that all types coming from the same compilation (.o file) are grouped
5618 together. A future step could be to put the types in the same symtab as
5619 the CU the types ultimately came from. */
5622 hash_type_unit_group (const void *item
)
5624 const struct type_unit_group
*tu_group
= item
;
5626 return hash_stmt_list_entry (&tu_group
->hash
);
5630 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
5632 const struct type_unit_group
*lhs
= item_lhs
;
5633 const struct type_unit_group
*rhs
= item_rhs
;
5635 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
5638 /* Allocate a hash table for type unit groups. */
5641 allocate_type_unit_groups_table (void)
5643 return htab_create_alloc_ex (3,
5644 hash_type_unit_group
,
5647 &dwarf2_per_objfile
->objfile
->objfile_obstack
,
5648 hashtab_obstack_allocate
,
5649 dummy_obstack_deallocate
);
5652 /* Type units that don't have DW_AT_stmt_list are grouped into their own
5653 partial symtabs. We combine several TUs per psymtab to not let the size
5654 of any one psymtab grow too big. */
5655 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
5656 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
5658 /* Helper routine for get_type_unit_group.
5659 Create the type_unit_group object used to hold one or more TUs. */
5661 static struct type_unit_group
*
5662 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
5664 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5665 struct dwarf2_per_cu_data
*per_cu
;
5666 struct type_unit_group
*tu_group
;
5668 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5669 struct type_unit_group
);
5670 per_cu
= &tu_group
->per_cu
;
5671 per_cu
->objfile
= objfile
;
5673 if (dwarf2_per_objfile
->using_index
)
5675 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5676 struct dwarf2_per_cu_quick_data
);
5680 unsigned int line_offset
= line_offset_struct
.sect_off
;
5681 struct partial_symtab
*pst
;
5684 /* Give the symtab a useful name for debug purposes. */
5685 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
5686 name
= xstrprintf ("<type_units_%d>",
5687 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
5689 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
5691 pst
= create_partial_symtab (per_cu
, name
);
5697 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
5698 tu_group
->hash
.line_offset
= line_offset_struct
;
5703 /* Look up the type_unit_group for type unit CU, and create it if necessary.
5704 STMT_LIST is a DW_AT_stmt_list attribute. */
5706 static struct type_unit_group
*
5707 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
5709 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
5710 struct type_unit_group
*tu_group
;
5712 unsigned int line_offset
;
5713 struct type_unit_group type_unit_group_for_lookup
;
5715 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
5717 dwarf2_per_objfile
->type_unit_groups
=
5718 allocate_type_unit_groups_table ();
5721 /* Do we need to create a new group, or can we use an existing one? */
5725 line_offset
= DW_UNSND (stmt_list
);
5726 ++tu_stats
->nr_symtab_sharers
;
5730 /* Ugh, no stmt_list. Rare, but we have to handle it.
5731 We can do various things here like create one group per TU or
5732 spread them over multiple groups to split up the expansion work.
5733 To avoid worst case scenarios (too many groups or too large groups)
5734 we, umm, group them in bunches. */
5735 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
5736 | (tu_stats
->nr_stmt_less_type_units
5737 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
5738 ++tu_stats
->nr_stmt_less_type_units
;
5741 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
5742 type_unit_group_for_lookup
.hash
.line_offset
.sect_off
= line_offset
;
5743 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
5744 &type_unit_group_for_lookup
, INSERT
);
5748 gdb_assert (tu_group
!= NULL
);
5752 sect_offset line_offset_struct
;
5754 line_offset_struct
.sect_off
= line_offset
;
5755 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
5757 ++tu_stats
->nr_symtabs
;
5763 /* Struct used to sort TUs by their abbreviation table offset. */
5765 struct tu_abbrev_offset
5767 struct signatured_type
*sig_type
;
5768 sect_offset abbrev_offset
;
5771 /* Helper routine for build_type_unit_groups, passed to qsort. */
5774 sort_tu_by_abbrev_offset (const void *ap
, const void *bp
)
5776 const struct tu_abbrev_offset
* const *a
= ap
;
5777 const struct tu_abbrev_offset
* const *b
= bp
;
5778 unsigned int aoff
= (*a
)->abbrev_offset
.sect_off
;
5779 unsigned int boff
= (*b
)->abbrev_offset
.sect_off
;
5781 return (aoff
> boff
) - (aoff
< boff
);
5784 /* A helper function to add a type_unit_group to a table. */
5787 add_type_unit_group_to_table (void **slot
, void *datum
)
5789 struct type_unit_group
*tu_group
= *slot
;
5790 struct type_unit_group
***datap
= datum
;
5798 /* Efficiently read all the type units, calling init_cutu_and_read_dies on
5799 each one passing FUNC,DATA.
5801 The efficiency is because we sort TUs by the abbrev table they use and
5802 only read each abbrev table once. In one program there are 200K TUs
5803 sharing 8K abbrev tables.
5805 The main purpose of this function is to support building the
5806 dwarf2_per_objfile->type_unit_groups table.
5807 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
5808 can collapse the search space by grouping them by stmt_list.
5809 The savings can be significant, in the same program from above the 200K TUs
5810 share 8K stmt_list tables.
5812 FUNC is expected to call get_type_unit_group, which will create the
5813 struct type_unit_group if necessary and add it to
5814 dwarf2_per_objfile->type_unit_groups. */
5817 build_type_unit_groups (die_reader_func_ftype
*func
, void *data
)
5819 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5820 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
5821 struct cleanup
*cleanups
;
5822 struct abbrev_table
*abbrev_table
;
5823 sect_offset abbrev_offset
;
5824 struct tu_abbrev_offset
*sorted_by_abbrev
;
5825 struct type_unit_group
**iter
;
5828 /* It's up to the caller to not call us multiple times. */
5829 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
5831 if (dwarf2_per_objfile
->n_type_units
== 0)
5834 /* TUs typically share abbrev tables, and there can be way more TUs than
5835 abbrev tables. Sort by abbrev table to reduce the number of times we
5836 read each abbrev table in.
5837 Alternatives are to punt or to maintain a cache of abbrev tables.
5838 This is simpler and efficient enough for now.
5840 Later we group TUs by their DW_AT_stmt_list value (as this defines the
5841 symtab to use). Typically TUs with the same abbrev offset have the same
5842 stmt_list value too so in practice this should work well.
5844 The basic algorithm here is:
5846 sort TUs by abbrev table
5847 for each TU with same abbrev table:
5848 read abbrev table if first user
5849 read TU top level DIE
5850 [IWBN if DWO skeletons had DW_AT_stmt_list]
5853 if (dwarf2_read_debug
)
5854 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
5856 /* Sort in a separate table to maintain the order of all_type_units
5857 for .gdb_index: TU indices directly index all_type_units. */
5858 sorted_by_abbrev
= XNEWVEC (struct tu_abbrev_offset
,
5859 dwarf2_per_objfile
->n_type_units
);
5860 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
5862 struct signatured_type
*sig_type
= dwarf2_per_objfile
->all_type_units
[i
];
5864 sorted_by_abbrev
[i
].sig_type
= sig_type
;
5865 sorted_by_abbrev
[i
].abbrev_offset
=
5866 read_abbrev_offset (sig_type
->per_cu
.section
,
5867 sig_type
->per_cu
.offset
);
5869 cleanups
= make_cleanup (xfree
, sorted_by_abbrev
);
5870 qsort (sorted_by_abbrev
, dwarf2_per_objfile
->n_type_units
,
5871 sizeof (struct tu_abbrev_offset
), sort_tu_by_abbrev_offset
);
5873 /* Note: In the .gdb_index case, get_type_unit_group may have already been
5874 called any number of times, so we don't reset tu_stats here. */
5876 abbrev_offset
.sect_off
= ~(unsigned) 0;
5877 abbrev_table
= NULL
;
5878 make_cleanup (abbrev_table_free_cleanup
, &abbrev_table
);
5880 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
5882 const struct tu_abbrev_offset
*tu
= &sorted_by_abbrev
[i
];
5884 /* Switch to the next abbrev table if necessary. */
5885 if (abbrev_table
== NULL
5886 || tu
->abbrev_offset
.sect_off
!= abbrev_offset
.sect_off
)
5888 if (abbrev_table
!= NULL
)
5890 abbrev_table_free (abbrev_table
);
5891 /* Reset to NULL in case abbrev_table_read_table throws
5892 an error: abbrev_table_free_cleanup will get called. */
5893 abbrev_table
= NULL
;
5895 abbrev_offset
= tu
->abbrev_offset
;
5897 abbrev_table_read_table (&dwarf2_per_objfile
->abbrev
,
5899 ++tu_stats
->nr_uniq_abbrev_tables
;
5902 init_cutu_and_read_dies (&tu
->sig_type
->per_cu
, abbrev_table
, 0, 0,
5906 /* type_unit_groups can be NULL if there is an error in the debug info.
5907 Just create an empty table so the rest of gdb doesn't have to watch
5908 for this error case. */
5909 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
5911 dwarf2_per_objfile
->type_unit_groups
=
5912 allocate_type_unit_groups_table ();
5913 dwarf2_per_objfile
->n_type_unit_groups
= 0;
5916 /* Create a vector of pointers to primary type units to make it easy to
5917 iterate over them and CUs. See dw2_get_primary_cu. */
5918 dwarf2_per_objfile
->n_type_unit_groups
=
5919 htab_elements (dwarf2_per_objfile
->type_unit_groups
);
5920 dwarf2_per_objfile
->all_type_unit_groups
=
5921 obstack_alloc (&objfile
->objfile_obstack
,
5922 dwarf2_per_objfile
->n_type_unit_groups
5923 * sizeof (struct type_unit_group
*));
5924 iter
= &dwarf2_per_objfile
->all_type_unit_groups
[0];
5925 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
5926 add_type_unit_group_to_table
, &iter
);
5927 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_unit_groups
[0]
5928 == dwarf2_per_objfile
->n_type_unit_groups
);
5930 do_cleanups (cleanups
);
5932 if (dwarf2_read_debug
)
5934 fprintf_unfiltered (gdb_stdlog
, "Done building type unit groups:\n");
5935 fprintf_unfiltered (gdb_stdlog
, " %d TUs\n",
5936 dwarf2_per_objfile
->n_type_units
);
5937 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
5938 tu_stats
->nr_uniq_abbrev_tables
);
5939 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
5940 tu_stats
->nr_symtabs
);
5941 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
5942 tu_stats
->nr_symtab_sharers
);
5943 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
5944 tu_stats
->nr_stmt_less_type_units
);
5948 /* Partial symbol tables. */
5950 /* Create a psymtab named NAME and assign it to PER_CU.
5952 The caller must fill in the following details:
5953 dirname, textlow, texthigh. */
5955 static struct partial_symtab
*
5956 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
5958 struct objfile
*objfile
= per_cu
->objfile
;
5959 struct partial_symtab
*pst
;
5961 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
5963 objfile
->global_psymbols
.next
,
5964 objfile
->static_psymbols
.next
);
5966 pst
->psymtabs_addrmap_supported
= 1;
5968 /* This is the glue that links PST into GDB's symbol API. */
5969 pst
->read_symtab_private
= per_cu
;
5970 pst
->read_symtab
= dwarf2_read_symtab
;
5971 per_cu
->v
.psymtab
= pst
;
5976 /* The DATA object passed to process_psymtab_comp_unit_reader has this
5979 struct process_psymtab_comp_unit_data
5981 /* True if we are reading a DW_TAG_partial_unit. */
5983 int want_partial_unit
;
5985 /* The "pretend" language that is used if the CU doesn't declare a
5988 enum language pretend_language
;
5991 /* die_reader_func for process_psymtab_comp_unit. */
5994 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
5995 const gdb_byte
*info_ptr
,
5996 struct die_info
*comp_unit_die
,
6000 struct dwarf2_cu
*cu
= reader
->cu
;
6001 struct objfile
*objfile
= cu
->objfile
;
6002 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
6003 struct attribute
*attr
;
6005 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
6006 struct partial_symtab
*pst
;
6008 const char *filename
;
6009 struct process_psymtab_comp_unit_data
*info
= data
;
6011 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !info
->want_partial_unit
)
6014 gdb_assert (! per_cu
->is_debug_types
);
6016 prepare_one_comp_unit (cu
, comp_unit_die
, info
->pretend_language
);
6018 cu
->list_in_scope
= &file_symbols
;
6020 /* Allocate a new partial symbol table structure. */
6021 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, cu
);
6022 if (attr
== NULL
|| !DW_STRING (attr
))
6025 filename
= DW_STRING (attr
);
6027 pst
= create_partial_symtab (per_cu
, filename
);
6029 /* This must be done before calling dwarf2_build_include_psymtabs. */
6030 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
6032 pst
->dirname
= DW_STRING (attr
);
6034 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6036 dwarf2_find_base_address (comp_unit_die
, cu
);
6038 /* Possibly set the default values of LOWPC and HIGHPC from
6040 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
6041 &best_highpc
, cu
, pst
);
6042 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
6043 /* Store the contiguous range if it is not empty; it can be empty for
6044 CUs with no code. */
6045 addrmap_set_empty (objfile
->psymtabs_addrmap
,
6046 best_lowpc
+ baseaddr
,
6047 best_highpc
+ baseaddr
- 1, pst
);
6049 /* Check if comp unit has_children.
6050 If so, read the rest of the partial symbols from this comp unit.
6051 If not, there's no more debug_info for this comp unit. */
6054 struct partial_die_info
*first_die
;
6055 CORE_ADDR lowpc
, highpc
;
6057 lowpc
= ((CORE_ADDR
) -1);
6058 highpc
= ((CORE_ADDR
) 0);
6060 first_die
= load_partial_dies (reader
, info_ptr
, 1);
6062 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
6065 /* If we didn't find a lowpc, set it to highpc to avoid
6066 complaints from `maint check'. */
6067 if (lowpc
== ((CORE_ADDR
) -1))
6070 /* If the compilation unit didn't have an explicit address range,
6071 then use the information extracted from its child dies. */
6075 best_highpc
= highpc
;
6078 pst
->textlow
= best_lowpc
+ baseaddr
;
6079 pst
->texthigh
= best_highpc
+ baseaddr
;
6081 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
6082 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
6083 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
6084 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
6085 sort_pst_symbols (objfile
, pst
);
6087 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
6090 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
6091 struct dwarf2_per_cu_data
*iter
;
6093 /* Fill in 'dependencies' here; we fill in 'users' in a
6095 pst
->number_of_dependencies
= len
;
6096 pst
->dependencies
= obstack_alloc (&objfile
->objfile_obstack
,
6097 len
* sizeof (struct symtab
*));
6099 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
6102 pst
->dependencies
[i
] = iter
->v
.psymtab
;
6104 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
6107 /* Get the list of files included in the current compilation unit,
6108 and build a psymtab for each of them. */
6109 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
6111 if (dwarf2_read_debug
)
6113 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6115 fprintf_unfiltered (gdb_stdlog
,
6116 "Psymtab for %s unit @0x%x: %s - %s"
6117 ", %d global, %d static syms\n",
6118 per_cu
->is_debug_types
? "type" : "comp",
6119 per_cu
->offset
.sect_off
,
6120 paddress (gdbarch
, pst
->textlow
),
6121 paddress (gdbarch
, pst
->texthigh
),
6122 pst
->n_global_syms
, pst
->n_static_syms
);
6126 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6127 Process compilation unit THIS_CU for a psymtab. */
6130 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
6131 int want_partial_unit
,
6132 enum language pretend_language
)
6134 struct process_psymtab_comp_unit_data info
;
6136 /* If this compilation unit was already read in, free the
6137 cached copy in order to read it in again. This is
6138 necessary because we skipped some symbols when we first
6139 read in the compilation unit (see load_partial_dies).
6140 This problem could be avoided, but the benefit is unclear. */
6141 if (this_cu
->cu
!= NULL
)
6142 free_one_cached_comp_unit (this_cu
);
6144 gdb_assert (! this_cu
->is_debug_types
);
6145 info
.want_partial_unit
= want_partial_unit
;
6146 info
.pretend_language
= pretend_language
;
6147 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0,
6148 process_psymtab_comp_unit_reader
,
6151 /* Age out any secondary CUs. */
6152 age_cached_comp_units ();
6155 /* Reader function for build_type_psymtabs. */
6158 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
6159 const gdb_byte
*info_ptr
,
6160 struct die_info
*type_unit_die
,
6164 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6165 struct dwarf2_cu
*cu
= reader
->cu
;
6166 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
6167 struct signatured_type
*sig_type
;
6168 struct type_unit_group
*tu_group
;
6169 struct attribute
*attr
;
6170 struct partial_die_info
*first_die
;
6171 CORE_ADDR lowpc
, highpc
;
6172 struct partial_symtab
*pst
;
6174 gdb_assert (data
== NULL
);
6175 gdb_assert (per_cu
->is_debug_types
);
6176 sig_type
= (struct signatured_type
*) per_cu
;
6181 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
6182 tu_group
= get_type_unit_group (cu
, attr
);
6184 VEC_safe_push (sig_type_ptr
, tu_group
->tus
, sig_type
);
6186 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
6187 cu
->list_in_scope
= &file_symbols
;
6188 pst
= create_partial_symtab (per_cu
, "");
6191 first_die
= load_partial_dies (reader
, info_ptr
, 1);
6193 lowpc
= (CORE_ADDR
) -1;
6194 highpc
= (CORE_ADDR
) 0;
6195 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
6197 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
6198 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
6199 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
6200 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
6201 sort_pst_symbols (objfile
, pst
);
6204 /* Traversal function for build_type_psymtabs. */
6207 build_type_psymtab_dependencies (void **slot
, void *info
)
6209 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6210 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
6211 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
6212 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6213 int len
= VEC_length (sig_type_ptr
, tu_group
->tus
);
6214 struct signatured_type
*iter
;
6217 gdb_assert (len
> 0);
6218 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
6220 pst
->number_of_dependencies
= len
;
6221 pst
->dependencies
= obstack_alloc (&objfile
->objfile_obstack
,
6222 len
* sizeof (struct psymtab
*));
6224 VEC_iterate (sig_type_ptr
, tu_group
->tus
, i
, iter
);
6227 gdb_assert (iter
->per_cu
.is_debug_types
);
6228 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
6229 iter
->type_unit_group
= tu_group
;
6232 VEC_free (sig_type_ptr
, tu_group
->tus
);
6237 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6238 Build partial symbol tables for the .debug_types comp-units. */
6241 build_type_psymtabs (struct objfile
*objfile
)
6243 if (! create_all_type_units (objfile
))
6246 build_type_unit_groups (build_type_psymtabs_reader
, NULL
);
6248 /* Now that all TUs have been processed we can fill in the dependencies. */
6249 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
6250 build_type_psymtab_dependencies
, NULL
);
6253 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
6256 psymtabs_addrmap_cleanup (void *o
)
6258 struct objfile
*objfile
= o
;
6260 objfile
->psymtabs_addrmap
= NULL
;
6263 /* Compute the 'user' field for each psymtab in OBJFILE. */
6266 set_partial_user (struct objfile
*objfile
)
6270 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6272 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
6273 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6279 for (j
= 0; j
< pst
->number_of_dependencies
; ++j
)
6281 /* Set the 'user' field only if it is not already set. */
6282 if (pst
->dependencies
[j
]->user
== NULL
)
6283 pst
->dependencies
[j
]->user
= pst
;
6288 /* Build the partial symbol table by doing a quick pass through the
6289 .debug_info and .debug_abbrev sections. */
6292 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
6294 struct cleanup
*back_to
, *addrmap_cleanup
;
6295 struct obstack temp_obstack
;
6298 if (dwarf2_read_debug
)
6300 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
6301 objfile_name (objfile
));
6304 dwarf2_per_objfile
->reading_partial_symbols
= 1;
6306 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
6308 /* Any cached compilation units will be linked by the per-objfile
6309 read_in_chain. Make sure to free them when we're done. */
6310 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
6312 build_type_psymtabs (objfile
);
6314 create_all_comp_units (objfile
);
6316 /* Create a temporary address map on a temporary obstack. We later
6317 copy this to the final obstack. */
6318 obstack_init (&temp_obstack
);
6319 make_cleanup_obstack_free (&temp_obstack
);
6320 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
6321 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
6323 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6325 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
6327 process_psymtab_comp_unit (per_cu
, 0, language_minimal
);
6330 set_partial_user (objfile
);
6332 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
6333 &objfile
->objfile_obstack
);
6334 discard_cleanups (addrmap_cleanup
);
6336 do_cleanups (back_to
);
6338 if (dwarf2_read_debug
)
6339 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
6340 objfile_name (objfile
));
6343 /* die_reader_func for load_partial_comp_unit. */
6346 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
6347 const gdb_byte
*info_ptr
,
6348 struct die_info
*comp_unit_die
,
6352 struct dwarf2_cu
*cu
= reader
->cu
;
6354 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
6356 /* Check if comp unit has_children.
6357 If so, read the rest of the partial symbols from this comp unit.
6358 If not, there's no more debug_info for this comp unit. */
6360 load_partial_dies (reader
, info_ptr
, 0);
6363 /* Load the partial DIEs for a secondary CU into memory.
6364 This is also used when rereading a primary CU with load_all_dies. */
6367 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
6369 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
6370 load_partial_comp_unit_reader
, NULL
);
6374 read_comp_units_from_section (struct objfile
*objfile
,
6375 struct dwarf2_section_info
*section
,
6376 unsigned int is_dwz
,
6379 struct dwarf2_per_cu_data
***all_comp_units
)
6381 const gdb_byte
*info_ptr
;
6382 bfd
*abfd
= get_section_bfd_owner (section
);
6384 if (dwarf2_read_debug
)
6385 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
6386 get_section_name (section
),
6387 get_section_file_name (section
));
6389 dwarf2_read_section (objfile
, section
);
6391 info_ptr
= section
->buffer
;
6393 while (info_ptr
< section
->buffer
+ section
->size
)
6395 unsigned int length
, initial_length_size
;
6396 struct dwarf2_per_cu_data
*this_cu
;
6399 offset
.sect_off
= info_ptr
- section
->buffer
;
6401 /* Read just enough information to find out where the next
6402 compilation unit is. */
6403 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6405 /* Save the compilation unit for later lookup. */
6406 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
6407 sizeof (struct dwarf2_per_cu_data
));
6408 memset (this_cu
, 0, sizeof (*this_cu
));
6409 this_cu
->offset
= offset
;
6410 this_cu
->length
= length
+ initial_length_size
;
6411 this_cu
->is_dwz
= is_dwz
;
6412 this_cu
->objfile
= objfile
;
6413 this_cu
->section
= section
;
6415 if (*n_comp_units
== *n_allocated
)
6418 *all_comp_units
= xrealloc (*all_comp_units
,
6420 * sizeof (struct dwarf2_per_cu_data
*));
6422 (*all_comp_units
)[*n_comp_units
] = this_cu
;
6425 info_ptr
= info_ptr
+ this_cu
->length
;
6429 /* Create a list of all compilation units in OBJFILE.
6430 This is only done for -readnow and building partial symtabs. */
6433 create_all_comp_units (struct objfile
*objfile
)
6437 struct dwarf2_per_cu_data
**all_comp_units
;
6438 struct dwz_file
*dwz
;
6442 all_comp_units
= xmalloc (n_allocated
6443 * sizeof (struct dwarf2_per_cu_data
*));
6445 read_comp_units_from_section (objfile
, &dwarf2_per_objfile
->info
, 0,
6446 &n_allocated
, &n_comp_units
, &all_comp_units
);
6448 dwz
= dwarf2_get_dwz_file ();
6450 read_comp_units_from_section (objfile
, &dwz
->info
, 1,
6451 &n_allocated
, &n_comp_units
,
6454 dwarf2_per_objfile
->all_comp_units
6455 = obstack_alloc (&objfile
->objfile_obstack
,
6456 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
6457 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
6458 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
6459 xfree (all_comp_units
);
6460 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
6463 /* Process all loaded DIEs for compilation unit CU, starting at
6464 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
6465 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
6466 DW_AT_ranges). If NEED_PC is set, then this function will set
6467 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
6468 and record the covered ranges in the addrmap. */
6471 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
6472 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
6474 struct partial_die_info
*pdi
;
6476 /* Now, march along the PDI's, descending into ones which have
6477 interesting children but skipping the children of the other ones,
6478 until we reach the end of the compilation unit. */
6484 fixup_partial_die (pdi
, cu
);
6486 /* Anonymous namespaces or modules have no name but have interesting
6487 children, so we need to look at them. Ditto for anonymous
6490 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
6491 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
6492 || pdi
->tag
== DW_TAG_imported_unit
)
6496 case DW_TAG_subprogram
:
6497 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
6499 case DW_TAG_constant
:
6500 case DW_TAG_variable
:
6501 case DW_TAG_typedef
:
6502 case DW_TAG_union_type
:
6503 if (!pdi
->is_declaration
)
6505 add_partial_symbol (pdi
, cu
);
6508 case DW_TAG_class_type
:
6509 case DW_TAG_interface_type
:
6510 case DW_TAG_structure_type
:
6511 if (!pdi
->is_declaration
)
6513 add_partial_symbol (pdi
, cu
);
6516 case DW_TAG_enumeration_type
:
6517 if (!pdi
->is_declaration
)
6518 add_partial_enumeration (pdi
, cu
);
6520 case DW_TAG_base_type
:
6521 case DW_TAG_subrange_type
:
6522 /* File scope base type definitions are added to the partial
6524 add_partial_symbol (pdi
, cu
);
6526 case DW_TAG_namespace
:
6527 add_partial_namespace (pdi
, lowpc
, highpc
, need_pc
, cu
);
6530 add_partial_module (pdi
, lowpc
, highpc
, need_pc
, cu
);
6532 case DW_TAG_imported_unit
:
6534 struct dwarf2_per_cu_data
*per_cu
;
6536 /* For now we don't handle imported units in type units. */
6537 if (cu
->per_cu
->is_debug_types
)
6539 error (_("Dwarf Error: DW_TAG_imported_unit is not"
6540 " supported in type units [in module %s]"),
6541 objfile_name (cu
->objfile
));
6544 per_cu
= dwarf2_find_containing_comp_unit (pdi
->d
.offset
,
6548 /* Go read the partial unit, if needed. */
6549 if (per_cu
->v
.psymtab
== NULL
)
6550 process_psymtab_comp_unit (per_cu
, 1, cu
->language
);
6552 VEC_safe_push (dwarf2_per_cu_ptr
,
6553 cu
->per_cu
->imported_symtabs
, per_cu
);
6556 case DW_TAG_imported_declaration
:
6557 add_partial_symbol (pdi
, cu
);
6564 /* If the die has a sibling, skip to the sibling. */
6566 pdi
= pdi
->die_sibling
;
6570 /* Functions used to compute the fully scoped name of a partial DIE.
6572 Normally, this is simple. For C++, the parent DIE's fully scoped
6573 name is concatenated with "::" and the partial DIE's name. For
6574 Java, the same thing occurs except that "." is used instead of "::".
6575 Enumerators are an exception; they use the scope of their parent
6576 enumeration type, i.e. the name of the enumeration type is not
6577 prepended to the enumerator.
6579 There are two complexities. One is DW_AT_specification; in this
6580 case "parent" means the parent of the target of the specification,
6581 instead of the direct parent of the DIE. The other is compilers
6582 which do not emit DW_TAG_namespace; in this case we try to guess
6583 the fully qualified name of structure types from their members'
6584 linkage names. This must be done using the DIE's children rather
6585 than the children of any DW_AT_specification target. We only need
6586 to do this for structures at the top level, i.e. if the target of
6587 any DW_AT_specification (if any; otherwise the DIE itself) does not
6590 /* Compute the scope prefix associated with PDI's parent, in
6591 compilation unit CU. The result will be allocated on CU's
6592 comp_unit_obstack, or a copy of the already allocated PDI->NAME
6593 field. NULL is returned if no prefix is necessary. */
6595 partial_die_parent_scope (struct partial_die_info
*pdi
,
6596 struct dwarf2_cu
*cu
)
6598 const char *grandparent_scope
;
6599 struct partial_die_info
*parent
, *real_pdi
;
6601 /* We need to look at our parent DIE; if we have a DW_AT_specification,
6602 then this means the parent of the specification DIE. */
6605 while (real_pdi
->has_specification
)
6606 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
6607 real_pdi
->spec_is_dwz
, cu
);
6609 parent
= real_pdi
->die_parent
;
6613 if (parent
->scope_set
)
6614 return parent
->scope
;
6616 fixup_partial_die (parent
, cu
);
6618 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
6620 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
6621 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
6622 Work around this problem here. */
6623 if (cu
->language
== language_cplus
6624 && parent
->tag
== DW_TAG_namespace
6625 && strcmp (parent
->name
, "::") == 0
6626 && grandparent_scope
== NULL
)
6628 parent
->scope
= NULL
;
6629 parent
->scope_set
= 1;
6633 if (pdi
->tag
== DW_TAG_enumerator
)
6634 /* Enumerators should not get the name of the enumeration as a prefix. */
6635 parent
->scope
= grandparent_scope
;
6636 else if (parent
->tag
== DW_TAG_namespace
6637 || parent
->tag
== DW_TAG_module
6638 || parent
->tag
== DW_TAG_structure_type
6639 || parent
->tag
== DW_TAG_class_type
6640 || parent
->tag
== DW_TAG_interface_type
6641 || parent
->tag
== DW_TAG_union_type
6642 || parent
->tag
== DW_TAG_enumeration_type
)
6644 if (grandparent_scope
== NULL
)
6645 parent
->scope
= parent
->name
;
6647 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
6649 parent
->name
, 0, cu
);
6653 /* FIXME drow/2004-04-01: What should we be doing with
6654 function-local names? For partial symbols, we should probably be
6656 complaint (&symfile_complaints
,
6657 _("unhandled containing DIE tag %d for DIE at %d"),
6658 parent
->tag
, pdi
->offset
.sect_off
);
6659 parent
->scope
= grandparent_scope
;
6662 parent
->scope_set
= 1;
6663 return parent
->scope
;
6666 /* Return the fully scoped name associated with PDI, from compilation unit
6667 CU. The result will be allocated with malloc. */
6670 partial_die_full_name (struct partial_die_info
*pdi
,
6671 struct dwarf2_cu
*cu
)
6673 const char *parent_scope
;
6675 /* If this is a template instantiation, we can not work out the
6676 template arguments from partial DIEs. So, unfortunately, we have
6677 to go through the full DIEs. At least any work we do building
6678 types here will be reused if full symbols are loaded later. */
6679 if (pdi
->has_template_arguments
)
6681 fixup_partial_die (pdi
, cu
);
6683 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
6685 struct die_info
*die
;
6686 struct attribute attr
;
6687 struct dwarf2_cu
*ref_cu
= cu
;
6689 /* DW_FORM_ref_addr is using section offset. */
6691 attr
.form
= DW_FORM_ref_addr
;
6692 attr
.u
.unsnd
= pdi
->offset
.sect_off
;
6693 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
6695 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
6699 parent_scope
= partial_die_parent_scope (pdi
, cu
);
6700 if (parent_scope
== NULL
)
6703 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
6707 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
6709 struct objfile
*objfile
= cu
->objfile
;
6711 const char *actual_name
= NULL
;
6713 char *built_actual_name
;
6715 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6717 built_actual_name
= partial_die_full_name (pdi
, cu
);
6718 if (built_actual_name
!= NULL
)
6719 actual_name
= built_actual_name
;
6721 if (actual_name
== NULL
)
6722 actual_name
= pdi
->name
;
6726 case DW_TAG_subprogram
:
6727 if (pdi
->is_external
|| cu
->language
== language_ada
)
6729 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
6730 of the global scope. But in Ada, we want to be able to access
6731 nested procedures globally. So all Ada subprograms are stored
6732 in the global scope. */
6733 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
6734 mst_text, objfile); */
6735 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6736 built_actual_name
!= NULL
,
6737 VAR_DOMAIN
, LOC_BLOCK
,
6738 &objfile
->global_psymbols
,
6739 0, pdi
->lowpc
+ baseaddr
,
6740 cu
->language
, objfile
);
6744 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
6745 mst_file_text, objfile); */
6746 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6747 built_actual_name
!= NULL
,
6748 VAR_DOMAIN
, LOC_BLOCK
,
6749 &objfile
->static_psymbols
,
6750 0, pdi
->lowpc
+ baseaddr
,
6751 cu
->language
, objfile
);
6754 case DW_TAG_constant
:
6756 struct psymbol_allocation_list
*list
;
6758 if (pdi
->is_external
)
6759 list
= &objfile
->global_psymbols
;
6761 list
= &objfile
->static_psymbols
;
6762 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6763 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
6764 list
, 0, 0, cu
->language
, objfile
);
6767 case DW_TAG_variable
:
6769 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
6773 && !dwarf2_per_objfile
->has_section_at_zero
)
6775 /* A global or static variable may also have been stripped
6776 out by the linker if unused, in which case its address
6777 will be nullified; do not add such variables into partial
6778 symbol table then. */
6780 else if (pdi
->is_external
)
6783 Don't enter into the minimal symbol tables as there is
6784 a minimal symbol table entry from the ELF symbols already.
6785 Enter into partial symbol table if it has a location
6786 descriptor or a type.
6787 If the location descriptor is missing, new_symbol will create
6788 a LOC_UNRESOLVED symbol, the address of the variable will then
6789 be determined from the minimal symbol table whenever the variable
6791 The address for the partial symbol table entry is not
6792 used by GDB, but it comes in handy for debugging partial symbol
6795 if (pdi
->d
.locdesc
|| pdi
->has_type
)
6796 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6797 built_actual_name
!= NULL
,
6798 VAR_DOMAIN
, LOC_STATIC
,
6799 &objfile
->global_psymbols
,
6801 cu
->language
, objfile
);
6805 /* Static Variable. Skip symbols without location descriptors. */
6806 if (pdi
->d
.locdesc
== NULL
)
6808 xfree (built_actual_name
);
6811 /* prim_record_minimal_symbol (actual_name, addr + baseaddr,
6812 mst_file_data, objfile); */
6813 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6814 built_actual_name
!= NULL
,
6815 VAR_DOMAIN
, LOC_STATIC
,
6816 &objfile
->static_psymbols
,
6818 cu
->language
, objfile
);
6821 case DW_TAG_typedef
:
6822 case DW_TAG_base_type
:
6823 case DW_TAG_subrange_type
:
6824 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6825 built_actual_name
!= NULL
,
6826 VAR_DOMAIN
, LOC_TYPEDEF
,
6827 &objfile
->static_psymbols
,
6828 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6830 case DW_TAG_imported_declaration
:
6831 case DW_TAG_namespace
:
6832 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6833 built_actual_name
!= NULL
,
6834 VAR_DOMAIN
, LOC_TYPEDEF
,
6835 &objfile
->global_psymbols
,
6836 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6839 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6840 built_actual_name
!= NULL
,
6841 MODULE_DOMAIN
, LOC_TYPEDEF
,
6842 &objfile
->global_psymbols
,
6843 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6845 case DW_TAG_class_type
:
6846 case DW_TAG_interface_type
:
6847 case DW_TAG_structure_type
:
6848 case DW_TAG_union_type
:
6849 case DW_TAG_enumeration_type
:
6850 /* Skip external references. The DWARF standard says in the section
6851 about "Structure, Union, and Class Type Entries": "An incomplete
6852 structure, union or class type is represented by a structure,
6853 union or class entry that does not have a byte size attribute
6854 and that has a DW_AT_declaration attribute." */
6855 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
6857 xfree (built_actual_name
);
6861 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
6862 static vs. global. */
6863 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6864 built_actual_name
!= NULL
,
6865 STRUCT_DOMAIN
, LOC_TYPEDEF
,
6866 (cu
->language
== language_cplus
6867 || cu
->language
== language_java
)
6868 ? &objfile
->global_psymbols
6869 : &objfile
->static_psymbols
,
6870 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6873 case DW_TAG_enumerator
:
6874 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6875 built_actual_name
!= NULL
,
6876 VAR_DOMAIN
, LOC_CONST
,
6877 (cu
->language
== language_cplus
6878 || cu
->language
== language_java
)
6879 ? &objfile
->global_psymbols
6880 : &objfile
->static_psymbols
,
6881 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6887 xfree (built_actual_name
);
6890 /* Read a partial die corresponding to a namespace; also, add a symbol
6891 corresponding to that namespace to the symbol table. NAMESPACE is
6892 the name of the enclosing namespace. */
6895 add_partial_namespace (struct partial_die_info
*pdi
,
6896 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
6897 int need_pc
, struct dwarf2_cu
*cu
)
6899 /* Add a symbol for the namespace. */
6901 add_partial_symbol (pdi
, cu
);
6903 /* Now scan partial symbols in that namespace. */
6905 if (pdi
->has_children
)
6906 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
6909 /* Read a partial die corresponding to a Fortran module. */
6912 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
6913 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
6915 /* Add a symbol for the namespace. */
6917 add_partial_symbol (pdi
, cu
);
6919 /* Now scan partial symbols in that module. */
6921 if (pdi
->has_children
)
6922 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
6925 /* Read a partial die corresponding to a subprogram and create a partial
6926 symbol for that subprogram. When the CU language allows it, this
6927 routine also defines a partial symbol for each nested subprogram
6928 that this subprogram contains.
6930 DIE my also be a lexical block, in which case we simply search
6931 recursively for suprograms defined inside that lexical block.
6932 Again, this is only performed when the CU language allows this
6933 type of definitions. */
6936 add_partial_subprogram (struct partial_die_info
*pdi
,
6937 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
6938 int need_pc
, struct dwarf2_cu
*cu
)
6940 if (pdi
->tag
== DW_TAG_subprogram
)
6942 if (pdi
->has_pc_info
)
6944 if (pdi
->lowpc
< *lowpc
)
6945 *lowpc
= pdi
->lowpc
;
6946 if (pdi
->highpc
> *highpc
)
6947 *highpc
= pdi
->highpc
;
6951 struct objfile
*objfile
= cu
->objfile
;
6953 baseaddr
= ANOFFSET (objfile
->section_offsets
,
6954 SECT_OFF_TEXT (objfile
));
6955 addrmap_set_empty (objfile
->psymtabs_addrmap
,
6956 pdi
->lowpc
+ baseaddr
,
6957 pdi
->highpc
- 1 + baseaddr
,
6958 cu
->per_cu
->v
.psymtab
);
6962 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
6964 if (!pdi
->is_declaration
)
6965 /* Ignore subprogram DIEs that do not have a name, they are
6966 illegal. Do not emit a complaint at this point, we will
6967 do so when we convert this psymtab into a symtab. */
6969 add_partial_symbol (pdi
, cu
);
6973 if (! pdi
->has_children
)
6976 if (cu
->language
== language_ada
)
6978 pdi
= pdi
->die_child
;
6981 fixup_partial_die (pdi
, cu
);
6982 if (pdi
->tag
== DW_TAG_subprogram
6983 || pdi
->tag
== DW_TAG_lexical_block
)
6984 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
6985 pdi
= pdi
->die_sibling
;
6990 /* Read a partial die corresponding to an enumeration type. */
6993 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
6994 struct dwarf2_cu
*cu
)
6996 struct partial_die_info
*pdi
;
6998 if (enum_pdi
->name
!= NULL
)
6999 add_partial_symbol (enum_pdi
, cu
);
7001 pdi
= enum_pdi
->die_child
;
7004 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
7005 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
7007 add_partial_symbol (pdi
, cu
);
7008 pdi
= pdi
->die_sibling
;
7012 /* Return the initial uleb128 in the die at INFO_PTR. */
7015 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
7017 unsigned int bytes_read
;
7019 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7022 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
7023 Return the corresponding abbrev, or NULL if the number is zero (indicating
7024 an empty DIE). In either case *BYTES_READ will be set to the length of
7025 the initial number. */
7027 static struct abbrev_info
*
7028 peek_die_abbrev (const gdb_byte
*info_ptr
, unsigned int *bytes_read
,
7029 struct dwarf2_cu
*cu
)
7031 bfd
*abfd
= cu
->objfile
->obfd
;
7032 unsigned int abbrev_number
;
7033 struct abbrev_info
*abbrev
;
7035 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
7037 if (abbrev_number
== 0)
7040 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
7043 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"),
7044 abbrev_number
, bfd_get_filename (abfd
));
7050 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7051 Returns a pointer to the end of a series of DIEs, terminated by an empty
7052 DIE. Any children of the skipped DIEs will also be skipped. */
7054 static const gdb_byte
*
7055 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
7057 struct dwarf2_cu
*cu
= reader
->cu
;
7058 struct abbrev_info
*abbrev
;
7059 unsigned int bytes_read
;
7063 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
7065 return info_ptr
+ bytes_read
;
7067 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
7071 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7072 INFO_PTR should point just after the initial uleb128 of a DIE, and the
7073 abbrev corresponding to that skipped uleb128 should be passed in
7074 ABBREV. Returns a pointer to this DIE's sibling, skipping any
7077 static const gdb_byte
*
7078 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
7079 struct abbrev_info
*abbrev
)
7081 unsigned int bytes_read
;
7082 struct attribute attr
;
7083 bfd
*abfd
= reader
->abfd
;
7084 struct dwarf2_cu
*cu
= reader
->cu
;
7085 const gdb_byte
*buffer
= reader
->buffer
;
7086 const gdb_byte
*buffer_end
= reader
->buffer_end
;
7087 const gdb_byte
*start_info_ptr
= info_ptr
;
7088 unsigned int form
, i
;
7090 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
7092 /* The only abbrev we care about is DW_AT_sibling. */
7093 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
7095 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
7096 if (attr
.form
== DW_FORM_ref_addr
)
7097 complaint (&symfile_complaints
,
7098 _("ignoring absolute DW_AT_sibling"));
7101 unsigned int off
= dwarf2_get_ref_die_offset (&attr
).sect_off
;
7102 const gdb_byte
*sibling_ptr
= buffer
+ off
;
7104 if (sibling_ptr
< info_ptr
)
7105 complaint (&symfile_complaints
,
7106 _("DW_AT_sibling points backwards"));
7107 else if (sibling_ptr
> reader
->buffer_end
)
7108 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
7114 /* If it isn't DW_AT_sibling, skip this attribute. */
7115 form
= abbrev
->attrs
[i
].form
;
7119 case DW_FORM_ref_addr
:
7120 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
7121 and later it is offset sized. */
7122 if (cu
->header
.version
== 2)
7123 info_ptr
+= cu
->header
.addr_size
;
7125 info_ptr
+= cu
->header
.offset_size
;
7127 case DW_FORM_GNU_ref_alt
:
7128 info_ptr
+= cu
->header
.offset_size
;
7131 info_ptr
+= cu
->header
.addr_size
;
7138 case DW_FORM_flag_present
:
7150 case DW_FORM_ref_sig8
:
7153 case DW_FORM_string
:
7154 read_direct_string (abfd
, info_ptr
, &bytes_read
);
7155 info_ptr
+= bytes_read
;
7157 case DW_FORM_sec_offset
:
7159 case DW_FORM_GNU_strp_alt
:
7160 info_ptr
+= cu
->header
.offset_size
;
7162 case DW_FORM_exprloc
:
7164 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7165 info_ptr
+= bytes_read
;
7167 case DW_FORM_block1
:
7168 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
7170 case DW_FORM_block2
:
7171 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
7173 case DW_FORM_block4
:
7174 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
7178 case DW_FORM_ref_udata
:
7179 case DW_FORM_GNU_addr_index
:
7180 case DW_FORM_GNU_str_index
:
7181 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
7183 case DW_FORM_indirect
:
7184 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7185 info_ptr
+= bytes_read
;
7186 /* We need to continue parsing from here, so just go back to
7188 goto skip_attribute
;
7191 error (_("Dwarf Error: Cannot handle %s "
7192 "in DWARF reader [in module %s]"),
7193 dwarf_form_name (form
),
7194 bfd_get_filename (abfd
));
7198 if (abbrev
->has_children
)
7199 return skip_children (reader
, info_ptr
);
7204 /* Locate ORIG_PDI's sibling.
7205 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
7207 static const gdb_byte
*
7208 locate_pdi_sibling (const struct die_reader_specs
*reader
,
7209 struct partial_die_info
*orig_pdi
,
7210 const gdb_byte
*info_ptr
)
7212 /* Do we know the sibling already? */
7214 if (orig_pdi
->sibling
)
7215 return orig_pdi
->sibling
;
7217 /* Are there any children to deal with? */
7219 if (!orig_pdi
->has_children
)
7222 /* Skip the children the long way. */
7224 return skip_children (reader
, info_ptr
);
7227 /* Expand this partial symbol table into a full symbol table. SELF is
7231 dwarf2_read_symtab (struct partial_symtab
*self
,
7232 struct objfile
*objfile
)
7236 warning (_("bug: psymtab for %s is already read in."),
7243 printf_filtered (_("Reading in symbols for %s..."),
7245 gdb_flush (gdb_stdout
);
7248 /* Restore our global data. */
7249 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
7251 /* If this psymtab is constructed from a debug-only objfile, the
7252 has_section_at_zero flag will not necessarily be correct. We
7253 can get the correct value for this flag by looking at the data
7254 associated with the (presumably stripped) associated objfile. */
7255 if (objfile
->separate_debug_objfile_backlink
)
7257 struct dwarf2_per_objfile
*dpo_backlink
7258 = objfile_data (objfile
->separate_debug_objfile_backlink
,
7259 dwarf2_objfile_data_key
);
7261 dwarf2_per_objfile
->has_section_at_zero
7262 = dpo_backlink
->has_section_at_zero
;
7265 dwarf2_per_objfile
->reading_partial_symbols
= 0;
7267 psymtab_to_symtab_1 (self
);
7269 /* Finish up the debug error message. */
7271 printf_filtered (_("done.\n"));
7274 process_cu_includes ();
7277 /* Reading in full CUs. */
7279 /* Add PER_CU to the queue. */
7282 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
7283 enum language pretend_language
)
7285 struct dwarf2_queue_item
*item
;
7288 item
= xmalloc (sizeof (*item
));
7289 item
->per_cu
= per_cu
;
7290 item
->pretend_language
= pretend_language
;
7293 if (dwarf2_queue
== NULL
)
7294 dwarf2_queue
= item
;
7296 dwarf2_queue_tail
->next
= item
;
7298 dwarf2_queue_tail
= item
;
7301 /* If PER_CU is not yet queued, add it to the queue.
7302 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
7304 The result is non-zero if PER_CU was queued, otherwise the result is zero
7305 meaning either PER_CU is already queued or it is already loaded.
7307 N.B. There is an invariant here that if a CU is queued then it is loaded.
7308 The caller is required to load PER_CU if we return non-zero. */
7311 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
7312 struct dwarf2_per_cu_data
*per_cu
,
7313 enum language pretend_language
)
7315 /* We may arrive here during partial symbol reading, if we need full
7316 DIEs to process an unusual case (e.g. template arguments). Do
7317 not queue PER_CU, just tell our caller to load its DIEs. */
7318 if (dwarf2_per_objfile
->reading_partial_symbols
)
7320 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
7325 /* Mark the dependence relation so that we don't flush PER_CU
7327 if (dependent_cu
!= NULL
)
7328 dwarf2_add_dependence (dependent_cu
, per_cu
);
7330 /* If it's already on the queue, we have nothing to do. */
7334 /* If the compilation unit is already loaded, just mark it as
7336 if (per_cu
->cu
!= NULL
)
7338 per_cu
->cu
->last_used
= 0;
7342 /* Add it to the queue. */
7343 queue_comp_unit (per_cu
, pretend_language
);
7348 /* Process the queue. */
7351 process_queue (void)
7353 struct dwarf2_queue_item
*item
, *next_item
;
7355 if (dwarf2_read_debug
)
7357 fprintf_unfiltered (gdb_stdlog
,
7358 "Expanding one or more symtabs of objfile %s ...\n",
7359 objfile_name (dwarf2_per_objfile
->objfile
));
7362 /* The queue starts out with one item, but following a DIE reference
7363 may load a new CU, adding it to the end of the queue. */
7364 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
7366 if (dwarf2_per_objfile
->using_index
7367 ? !item
->per_cu
->v
.quick
->symtab
7368 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
7370 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
7371 unsigned int debug_print_threshold
;
7374 if (per_cu
->is_debug_types
)
7376 struct signatured_type
*sig_type
=
7377 (struct signatured_type
*) per_cu
;
7379 sprintf (buf
, "TU %s at offset 0x%x",
7380 hex_string (sig_type
->signature
),
7381 per_cu
->offset
.sect_off
);
7382 /* There can be 100s of TUs.
7383 Only print them in verbose mode. */
7384 debug_print_threshold
= 2;
7388 sprintf (buf
, "CU at offset 0x%x", per_cu
->offset
.sect_off
);
7389 debug_print_threshold
= 1;
7392 if (dwarf2_read_debug
>= debug_print_threshold
)
7393 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
7395 if (per_cu
->is_debug_types
)
7396 process_full_type_unit (per_cu
, item
->pretend_language
);
7398 process_full_comp_unit (per_cu
, item
->pretend_language
);
7400 if (dwarf2_read_debug
>= debug_print_threshold
)
7401 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
7404 item
->per_cu
->queued
= 0;
7405 next_item
= item
->next
;
7409 dwarf2_queue_tail
= NULL
;
7411 if (dwarf2_read_debug
)
7413 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
7414 objfile_name (dwarf2_per_objfile
->objfile
));
7418 /* Free all allocated queue entries. This function only releases anything if
7419 an error was thrown; if the queue was processed then it would have been
7420 freed as we went along. */
7423 dwarf2_release_queue (void *dummy
)
7425 struct dwarf2_queue_item
*item
, *last
;
7427 item
= dwarf2_queue
;
7430 /* Anything still marked queued is likely to be in an
7431 inconsistent state, so discard it. */
7432 if (item
->per_cu
->queued
)
7434 if (item
->per_cu
->cu
!= NULL
)
7435 free_one_cached_comp_unit (item
->per_cu
);
7436 item
->per_cu
->queued
= 0;
7444 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
7447 /* Read in full symbols for PST, and anything it depends on. */
7450 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
7452 struct dwarf2_per_cu_data
*per_cu
;
7458 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
7459 if (!pst
->dependencies
[i
]->readin
7460 && pst
->dependencies
[i
]->user
== NULL
)
7462 /* Inform about additional files that need to be read in. */
7465 /* FIXME: i18n: Need to make this a single string. */
7466 fputs_filtered (" ", gdb_stdout
);
7468 fputs_filtered ("and ", gdb_stdout
);
7470 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
7471 wrap_here (""); /* Flush output. */
7472 gdb_flush (gdb_stdout
);
7474 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
7477 per_cu
= pst
->read_symtab_private
;
7481 /* It's an include file, no symbols to read for it.
7482 Everything is in the parent symtab. */
7487 dw2_do_instantiate_symtab (per_cu
);
7490 /* Trivial hash function for die_info: the hash value of a DIE
7491 is its offset in .debug_info for this objfile. */
7494 die_hash (const void *item
)
7496 const struct die_info
*die
= item
;
7498 return die
->offset
.sect_off
;
7501 /* Trivial comparison function for die_info structures: two DIEs
7502 are equal if they have the same offset. */
7505 die_eq (const void *item_lhs
, const void *item_rhs
)
7507 const struct die_info
*die_lhs
= item_lhs
;
7508 const struct die_info
*die_rhs
= item_rhs
;
7510 return die_lhs
->offset
.sect_off
== die_rhs
->offset
.sect_off
;
7513 /* die_reader_func for load_full_comp_unit.
7514 This is identical to read_signatured_type_reader,
7515 but is kept separate for now. */
7518 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
7519 const gdb_byte
*info_ptr
,
7520 struct die_info
*comp_unit_die
,
7524 struct dwarf2_cu
*cu
= reader
->cu
;
7525 enum language
*language_ptr
= data
;
7527 gdb_assert (cu
->die_hash
== NULL
);
7529 htab_create_alloc_ex (cu
->header
.length
/ 12,
7533 &cu
->comp_unit_obstack
,
7534 hashtab_obstack_allocate
,
7535 dummy_obstack_deallocate
);
7538 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
7539 &info_ptr
, comp_unit_die
);
7540 cu
->dies
= comp_unit_die
;
7541 /* comp_unit_die is not stored in die_hash, no need. */
7543 /* We try not to read any attributes in this function, because not
7544 all CUs needed for references have been loaded yet, and symbol
7545 table processing isn't initialized. But we have to set the CU language,
7546 or we won't be able to build types correctly.
7547 Similarly, if we do not read the producer, we can not apply
7548 producer-specific interpretation. */
7549 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
7552 /* Load the DIEs associated with PER_CU into memory. */
7555 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
7556 enum language pretend_language
)
7558 gdb_assert (! this_cu
->is_debug_types
);
7560 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
7561 load_full_comp_unit_reader
, &pretend_language
);
7564 /* Add a DIE to the delayed physname list. */
7567 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
7568 const char *name
, struct die_info
*die
,
7569 struct dwarf2_cu
*cu
)
7571 struct delayed_method_info mi
;
7573 mi
.fnfield_index
= fnfield_index
;
7577 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
7580 /* A cleanup for freeing the delayed method list. */
7583 free_delayed_list (void *ptr
)
7585 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
7586 if (cu
->method_list
!= NULL
)
7588 VEC_free (delayed_method_info
, cu
->method_list
);
7589 cu
->method_list
= NULL
;
7593 /* Compute the physnames of any methods on the CU's method list.
7595 The computation of method physnames is delayed in order to avoid the
7596 (bad) condition that one of the method's formal parameters is of an as yet
7600 compute_delayed_physnames (struct dwarf2_cu
*cu
)
7603 struct delayed_method_info
*mi
;
7604 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
7606 const char *physname
;
7607 struct fn_fieldlist
*fn_flp
7608 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
7609 physname
= dwarf2_physname (mi
->name
, mi
->die
, cu
);
7610 fn_flp
->fn_fields
[mi
->index
].physname
= physname
? physname
: "";
7614 /* Go objects should be embedded in a DW_TAG_module DIE,
7615 and it's not clear if/how imported objects will appear.
7616 To keep Go support simple until that's worked out,
7617 go back through what we've read and create something usable.
7618 We could do this while processing each DIE, and feels kinda cleaner,
7619 but that way is more invasive.
7620 This is to, for example, allow the user to type "p var" or "b main"
7621 without having to specify the package name, and allow lookups
7622 of module.object to work in contexts that use the expression
7626 fixup_go_packaging (struct dwarf2_cu
*cu
)
7628 char *package_name
= NULL
;
7629 struct pending
*list
;
7632 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
7634 for (i
= 0; i
< list
->nsyms
; ++i
)
7636 struct symbol
*sym
= list
->symbol
[i
];
7638 if (SYMBOL_LANGUAGE (sym
) == language_go
7639 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
7641 char *this_package_name
= go_symbol_package_name (sym
);
7643 if (this_package_name
== NULL
)
7645 if (package_name
== NULL
)
7646 package_name
= this_package_name
;
7649 if (strcmp (package_name
, this_package_name
) != 0)
7650 complaint (&symfile_complaints
,
7651 _("Symtab %s has objects from two different Go packages: %s and %s"),
7652 (SYMBOL_SYMTAB (sym
)
7653 ? symtab_to_filename_for_display (SYMBOL_SYMTAB (sym
))
7654 : objfile_name (cu
->objfile
)),
7655 this_package_name
, package_name
);
7656 xfree (this_package_name
);
7662 if (package_name
!= NULL
)
7664 struct objfile
*objfile
= cu
->objfile
;
7665 const char *saved_package_name
= obstack_copy0 (&objfile
->objfile_obstack
,
7667 strlen (package_name
));
7668 struct type
*type
= init_type (TYPE_CODE_MODULE
, 0, 0,
7669 saved_package_name
, objfile
);
7672 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
7674 sym
= allocate_symbol (objfile
);
7675 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
7676 SYMBOL_SET_NAMES (sym
, saved_package_name
,
7677 strlen (saved_package_name
), 0, objfile
);
7678 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
7679 e.g., "main" finds the "main" module and not C's main(). */
7680 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
7681 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
7682 SYMBOL_TYPE (sym
) = type
;
7684 add_symbol_to_list (sym
, &global_symbols
);
7686 xfree (package_name
);
7690 /* Return the symtab for PER_CU. This works properly regardless of
7691 whether we're using the index or psymtabs. */
7693 static struct symtab
*
7694 get_symtab (struct dwarf2_per_cu_data
*per_cu
)
7696 return (dwarf2_per_objfile
->using_index
7697 ? per_cu
->v
.quick
->symtab
7698 : per_cu
->v
.psymtab
->symtab
);
7701 /* A helper function for computing the list of all symbol tables
7702 included by PER_CU. */
7705 recursively_compute_inclusions (VEC (symtab_ptr
) **result
,
7706 htab_t all_children
, htab_t all_type_symtabs
,
7707 struct dwarf2_per_cu_data
*per_cu
,
7708 struct symtab
*immediate_parent
)
7712 struct symtab
*symtab
;
7713 struct dwarf2_per_cu_data
*iter
;
7715 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
7718 /* This inclusion and its children have been processed. */
7723 /* Only add a CU if it has a symbol table. */
7724 symtab
= get_symtab (per_cu
);
7727 /* If this is a type unit only add its symbol table if we haven't
7728 seen it yet (type unit per_cu's can share symtabs). */
7729 if (per_cu
->is_debug_types
)
7731 slot
= htab_find_slot (all_type_symtabs
, symtab
, INSERT
);
7735 VEC_safe_push (symtab_ptr
, *result
, symtab
);
7736 if (symtab
->user
== NULL
)
7737 symtab
->user
= immediate_parent
;
7742 VEC_safe_push (symtab_ptr
, *result
, symtab
);
7743 if (symtab
->user
== NULL
)
7744 symtab
->user
= immediate_parent
;
7749 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
7752 recursively_compute_inclusions (result
, all_children
,
7753 all_type_symtabs
, iter
, symtab
);
7757 /* Compute the symtab 'includes' fields for the symtab related to
7761 compute_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
7763 gdb_assert (! per_cu
->is_debug_types
);
7765 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
7768 struct dwarf2_per_cu_data
*per_cu_iter
;
7769 struct symtab
*symtab_iter
;
7770 VEC (symtab_ptr
) *result_symtabs
= NULL
;
7771 htab_t all_children
, all_type_symtabs
;
7772 struct symtab
*symtab
= get_symtab (per_cu
);
7774 /* If we don't have a symtab, we can just skip this case. */
7778 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
7779 NULL
, xcalloc
, xfree
);
7780 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
7781 NULL
, xcalloc
, xfree
);
7784 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
7788 recursively_compute_inclusions (&result_symtabs
, all_children
,
7789 all_type_symtabs
, per_cu_iter
,
7793 /* Now we have a transitive closure of all the included symtabs. */
7794 len
= VEC_length (symtab_ptr
, result_symtabs
);
7796 = obstack_alloc (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
7797 (len
+ 1) * sizeof (struct symtab
*));
7799 VEC_iterate (symtab_ptr
, result_symtabs
, ix
, symtab_iter
);
7801 symtab
->includes
[ix
] = symtab_iter
;
7802 symtab
->includes
[len
] = NULL
;
7804 VEC_free (symtab_ptr
, result_symtabs
);
7805 htab_delete (all_children
);
7806 htab_delete (all_type_symtabs
);
7810 /* Compute the 'includes' field for the symtabs of all the CUs we just
7814 process_cu_includes (void)
7817 struct dwarf2_per_cu_data
*iter
;
7820 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
7824 if (! iter
->is_debug_types
)
7825 compute_symtab_includes (iter
);
7828 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
7831 /* Generate full symbol information for PER_CU, whose DIEs have
7832 already been loaded into memory. */
7835 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
7836 enum language pretend_language
)
7838 struct dwarf2_cu
*cu
= per_cu
->cu
;
7839 struct objfile
*objfile
= per_cu
->objfile
;
7840 CORE_ADDR lowpc
, highpc
;
7841 struct symtab
*symtab
;
7842 struct cleanup
*back_to
, *delayed_list_cleanup
;
7844 struct block
*static_block
;
7846 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7849 back_to
= make_cleanup (really_free_pendings
, NULL
);
7850 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
7852 cu
->list_in_scope
= &file_symbols
;
7854 cu
->language
= pretend_language
;
7855 cu
->language_defn
= language_def (cu
->language
);
7857 /* Do line number decoding in read_file_scope () */
7858 process_die (cu
->dies
, cu
);
7860 /* For now fudge the Go package. */
7861 if (cu
->language
== language_go
)
7862 fixup_go_packaging (cu
);
7864 /* Now that we have processed all the DIEs in the CU, all the types
7865 should be complete, and it should now be safe to compute all of the
7867 compute_delayed_physnames (cu
);
7868 do_cleanups (delayed_list_cleanup
);
7870 /* Some compilers don't define a DW_AT_high_pc attribute for the
7871 compilation unit. If the DW_AT_high_pc is missing, synthesize
7872 it, by scanning the DIE's below the compilation unit. */
7873 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
7876 = end_symtab_get_static_block (highpc
+ baseaddr
, objfile
, 0, 1);
7878 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
7879 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
7880 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
7881 addrmap to help ensure it has an accurate map of pc values belonging to
7883 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
7885 symtab
= end_symtab_from_static_block (static_block
, objfile
,
7886 SECT_OFF_TEXT (objfile
), 0);
7890 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
7892 /* Set symtab language to language from DW_AT_language. If the
7893 compilation is from a C file generated by language preprocessors, do
7894 not set the language if it was already deduced by start_subfile. */
7895 if (!(cu
->language
== language_c
&& symtab
->language
!= language_c
))
7896 symtab
->language
= cu
->language
;
7898 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
7899 produce DW_AT_location with location lists but it can be possibly
7900 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
7901 there were bugs in prologue debug info, fixed later in GCC-4.5
7902 by "unwind info for epilogues" patch (which is not directly related).
7904 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
7905 needed, it would be wrong due to missing DW_AT_producer there.
7907 Still one can confuse GDB by using non-standard GCC compilation
7908 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
7910 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
7911 symtab
->locations_valid
= 1;
7913 if (gcc_4_minor
>= 5)
7914 symtab
->epilogue_unwind_valid
= 1;
7916 symtab
->call_site_htab
= cu
->call_site_htab
;
7919 if (dwarf2_per_objfile
->using_index
)
7920 per_cu
->v
.quick
->symtab
= symtab
;
7923 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
7924 pst
->symtab
= symtab
;
7928 /* Push it for inclusion processing later. */
7929 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
7931 do_cleanups (back_to
);
7934 /* Generate full symbol information for type unit PER_CU, whose DIEs have
7935 already been loaded into memory. */
7938 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
7939 enum language pretend_language
)
7941 struct dwarf2_cu
*cu
= per_cu
->cu
;
7942 struct objfile
*objfile
= per_cu
->objfile
;
7943 struct symtab
*symtab
;
7944 struct cleanup
*back_to
, *delayed_list_cleanup
;
7945 struct signatured_type
*sig_type
;
7947 gdb_assert (per_cu
->is_debug_types
);
7948 sig_type
= (struct signatured_type
*) per_cu
;
7951 back_to
= make_cleanup (really_free_pendings
, NULL
);
7952 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
7954 cu
->list_in_scope
= &file_symbols
;
7956 cu
->language
= pretend_language
;
7957 cu
->language_defn
= language_def (cu
->language
);
7959 /* The symbol tables are set up in read_type_unit_scope. */
7960 process_die (cu
->dies
, cu
);
7962 /* For now fudge the Go package. */
7963 if (cu
->language
== language_go
)
7964 fixup_go_packaging (cu
);
7966 /* Now that we have processed all the DIEs in the CU, all the types
7967 should be complete, and it should now be safe to compute all of the
7969 compute_delayed_physnames (cu
);
7970 do_cleanups (delayed_list_cleanup
);
7972 /* TUs share symbol tables.
7973 If this is the first TU to use this symtab, complete the construction
7974 of it with end_expandable_symtab. Otherwise, complete the addition of
7975 this TU's symbols to the existing symtab. */
7976 if (sig_type
->type_unit_group
->primary_symtab
== NULL
)
7978 symtab
= end_expandable_symtab (0, objfile
, SECT_OFF_TEXT (objfile
));
7979 sig_type
->type_unit_group
->primary_symtab
= symtab
;
7983 /* Set symtab language to language from DW_AT_language. If the
7984 compilation is from a C file generated by language preprocessors,
7985 do not set the language if it was already deduced by
7987 if (!(cu
->language
== language_c
&& symtab
->language
!= language_c
))
7988 symtab
->language
= cu
->language
;
7993 augment_type_symtab (objfile
,
7994 sig_type
->type_unit_group
->primary_symtab
);
7995 symtab
= sig_type
->type_unit_group
->primary_symtab
;
7998 if (dwarf2_per_objfile
->using_index
)
7999 per_cu
->v
.quick
->symtab
= symtab
;
8002 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8003 pst
->symtab
= symtab
;
8007 do_cleanups (back_to
);
8010 /* Process an imported unit DIE. */
8013 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8015 struct attribute
*attr
;
8017 /* For now we don't handle imported units in type units. */
8018 if (cu
->per_cu
->is_debug_types
)
8020 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8021 " supported in type units [in module %s]"),
8022 objfile_name (cu
->objfile
));
8025 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8028 struct dwarf2_per_cu_data
*per_cu
;
8029 struct symtab
*imported_symtab
;
8033 offset
= dwarf2_get_ref_die_offset (attr
);
8034 is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
8035 per_cu
= dwarf2_find_containing_comp_unit (offset
, is_dwz
, cu
->objfile
);
8037 /* If necessary, add it to the queue and load its DIEs. */
8038 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
8039 load_full_comp_unit (per_cu
, cu
->language
);
8041 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
8046 /* Reset the in_process bit of a die. */
8049 reset_die_in_process (void *arg
)
8051 struct die_info
*die
= arg
;
8053 die
->in_process
= 0;
8056 /* Process a die and its children. */
8059 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8061 struct cleanup
*in_process
;
8063 /* We should only be processing those not already in process. */
8064 gdb_assert (!die
->in_process
);
8066 die
->in_process
= 1;
8067 in_process
= make_cleanup (reset_die_in_process
,die
);
8071 case DW_TAG_padding
:
8073 case DW_TAG_compile_unit
:
8074 case DW_TAG_partial_unit
:
8075 read_file_scope (die
, cu
);
8077 case DW_TAG_type_unit
:
8078 read_type_unit_scope (die
, cu
);
8080 case DW_TAG_subprogram
:
8081 case DW_TAG_inlined_subroutine
:
8082 read_func_scope (die
, cu
);
8084 case DW_TAG_lexical_block
:
8085 case DW_TAG_try_block
:
8086 case DW_TAG_catch_block
:
8087 read_lexical_block_scope (die
, cu
);
8089 case DW_TAG_GNU_call_site
:
8090 read_call_site_scope (die
, cu
);
8092 case DW_TAG_class_type
:
8093 case DW_TAG_interface_type
:
8094 case DW_TAG_structure_type
:
8095 case DW_TAG_union_type
:
8096 process_structure_scope (die
, cu
);
8098 case DW_TAG_enumeration_type
:
8099 process_enumeration_scope (die
, cu
);
8102 /* These dies have a type, but processing them does not create
8103 a symbol or recurse to process the children. Therefore we can
8104 read them on-demand through read_type_die. */
8105 case DW_TAG_subroutine_type
:
8106 case DW_TAG_set_type
:
8107 case DW_TAG_array_type
:
8108 case DW_TAG_pointer_type
:
8109 case DW_TAG_ptr_to_member_type
:
8110 case DW_TAG_reference_type
:
8111 case DW_TAG_string_type
:
8114 case DW_TAG_base_type
:
8115 case DW_TAG_subrange_type
:
8116 case DW_TAG_typedef
:
8117 /* Add a typedef symbol for the type definition, if it has a
8119 new_symbol (die
, read_type_die (die
, cu
), cu
);
8121 case DW_TAG_common_block
:
8122 read_common_block (die
, cu
);
8124 case DW_TAG_common_inclusion
:
8126 case DW_TAG_namespace
:
8127 cu
->processing_has_namespace_info
= 1;
8128 read_namespace (die
, cu
);
8131 cu
->processing_has_namespace_info
= 1;
8132 read_module (die
, cu
);
8134 case DW_TAG_imported_declaration
:
8135 cu
->processing_has_namespace_info
= 1;
8136 if (read_namespace_alias (die
, cu
))
8138 /* The declaration is not a global namespace alias: fall through. */
8139 case DW_TAG_imported_module
:
8140 cu
->processing_has_namespace_info
= 1;
8141 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
8142 || cu
->language
!= language_fortran
))
8143 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
8144 dwarf_tag_name (die
->tag
));
8145 read_import_statement (die
, cu
);
8148 case DW_TAG_imported_unit
:
8149 process_imported_unit_die (die
, cu
);
8153 new_symbol (die
, NULL
, cu
);
8157 do_cleanups (in_process
);
8160 /* DWARF name computation. */
8162 /* A helper function for dwarf2_compute_name which determines whether DIE
8163 needs to have the name of the scope prepended to the name listed in the
8167 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
8169 struct attribute
*attr
;
8173 case DW_TAG_namespace
:
8174 case DW_TAG_typedef
:
8175 case DW_TAG_class_type
:
8176 case DW_TAG_interface_type
:
8177 case DW_TAG_structure_type
:
8178 case DW_TAG_union_type
:
8179 case DW_TAG_enumeration_type
:
8180 case DW_TAG_enumerator
:
8181 case DW_TAG_subprogram
:
8183 case DW_TAG_imported_declaration
:
8186 case DW_TAG_variable
:
8187 case DW_TAG_constant
:
8188 /* We only need to prefix "globally" visible variables. These include
8189 any variable marked with DW_AT_external or any variable that
8190 lives in a namespace. [Variables in anonymous namespaces
8191 require prefixing, but they are not DW_AT_external.] */
8193 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
8195 struct dwarf2_cu
*spec_cu
= cu
;
8197 return die_needs_namespace (die_specification (die
, &spec_cu
),
8201 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
8202 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
8203 && die
->parent
->tag
!= DW_TAG_module
)
8205 /* A variable in a lexical block of some kind does not need a
8206 namespace, even though in C++ such variables may be external
8207 and have a mangled name. */
8208 if (die
->parent
->tag
== DW_TAG_lexical_block
8209 || die
->parent
->tag
== DW_TAG_try_block
8210 || die
->parent
->tag
== DW_TAG_catch_block
8211 || die
->parent
->tag
== DW_TAG_subprogram
)
8220 /* Retrieve the last character from a mem_file. */
8223 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
8225 char *last_char_p
= (char *) object
;
8228 *last_char_p
= buffer
[length
- 1];
8231 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
8232 compute the physname for the object, which include a method's:
8233 - formal parameters (C++/Java),
8234 - receiver type (Go),
8235 - return type (Java).
8237 The term "physname" is a bit confusing.
8238 For C++, for example, it is the demangled name.
8239 For Go, for example, it's the mangled name.
8241 For Ada, return the DIE's linkage name rather than the fully qualified
8242 name. PHYSNAME is ignored..
8244 The result is allocated on the objfile_obstack and canonicalized. */
8247 dwarf2_compute_name (const char *name
,
8248 struct die_info
*die
, struct dwarf2_cu
*cu
,
8251 struct objfile
*objfile
= cu
->objfile
;
8254 name
= dwarf2_name (die
, cu
);
8256 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
8257 compute it by typename_concat inside GDB. */
8258 if (cu
->language
== language_ada
8259 || (cu
->language
== language_fortran
&& physname
))
8261 /* For Ada unit, we prefer the linkage name over the name, as
8262 the former contains the exported name, which the user expects
8263 to be able to reference. Ideally, we want the user to be able
8264 to reference this entity using either natural or linkage name,
8265 but we haven't started looking at this enhancement yet. */
8266 struct attribute
*attr
;
8268 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
8270 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8271 if (attr
&& DW_STRING (attr
))
8272 return DW_STRING (attr
);
8275 /* These are the only languages we know how to qualify names in. */
8277 && (cu
->language
== language_cplus
|| cu
->language
== language_java
8278 || cu
->language
== language_fortran
))
8280 if (die_needs_namespace (die
, cu
))
8284 struct ui_file
*buf
;
8286 prefix
= determine_prefix (die
, cu
);
8287 buf
= mem_fileopen ();
8288 if (*prefix
!= '\0')
8290 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
8293 fputs_unfiltered (prefixed_name
, buf
);
8294 xfree (prefixed_name
);
8297 fputs_unfiltered (name
, buf
);
8299 /* Template parameters may be specified in the DIE's DW_AT_name, or
8300 as children with DW_TAG_template_type_param or
8301 DW_TAG_value_type_param. If the latter, add them to the name
8302 here. If the name already has template parameters, then
8303 skip this step; some versions of GCC emit both, and
8304 it is more efficient to use the pre-computed name.
8306 Something to keep in mind about this process: it is very
8307 unlikely, or in some cases downright impossible, to produce
8308 something that will match the mangled name of a function.
8309 If the definition of the function has the same debug info,
8310 we should be able to match up with it anyway. But fallbacks
8311 using the minimal symbol, for instance to find a method
8312 implemented in a stripped copy of libstdc++, will not work.
8313 If we do not have debug info for the definition, we will have to
8314 match them up some other way.
8316 When we do name matching there is a related problem with function
8317 templates; two instantiated function templates are allowed to
8318 differ only by their return types, which we do not add here. */
8320 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
8322 struct attribute
*attr
;
8323 struct die_info
*child
;
8326 die
->building_fullname
= 1;
8328 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
8332 const gdb_byte
*bytes
;
8333 struct dwarf2_locexpr_baton
*baton
;
8336 if (child
->tag
!= DW_TAG_template_type_param
8337 && child
->tag
!= DW_TAG_template_value_param
)
8342 fputs_unfiltered ("<", buf
);
8346 fputs_unfiltered (", ", buf
);
8348 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
8351 complaint (&symfile_complaints
,
8352 _("template parameter missing DW_AT_type"));
8353 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
8356 type
= die_type (child
, cu
);
8358 if (child
->tag
== DW_TAG_template_type_param
)
8360 c_print_type (type
, "", buf
, -1, 0, &type_print_raw_options
);
8364 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
8367 complaint (&symfile_complaints
,
8368 _("template parameter missing "
8369 "DW_AT_const_value"));
8370 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
8374 dwarf2_const_value_attr (attr
, type
, name
,
8375 &cu
->comp_unit_obstack
, cu
,
8376 &value
, &bytes
, &baton
);
8378 if (TYPE_NOSIGN (type
))
8379 /* GDB prints characters as NUMBER 'CHAR'. If that's
8380 changed, this can use value_print instead. */
8381 c_printchar (value
, type
, buf
);
8384 struct value_print_options opts
;
8387 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
8391 else if (bytes
!= NULL
)
8393 v
= allocate_value (type
);
8394 memcpy (value_contents_writeable (v
), bytes
,
8395 TYPE_LENGTH (type
));
8398 v
= value_from_longest (type
, value
);
8400 /* Specify decimal so that we do not depend on
8402 get_formatted_print_options (&opts
, 'd');
8404 value_print (v
, buf
, &opts
);
8410 die
->building_fullname
= 0;
8414 /* Close the argument list, with a space if necessary
8415 (nested templates). */
8416 char last_char
= '\0';
8417 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
8418 if (last_char
== '>')
8419 fputs_unfiltered (" >", buf
);
8421 fputs_unfiltered (">", buf
);
8425 /* For Java and C++ methods, append formal parameter type
8426 information, if PHYSNAME. */
8428 if (physname
&& die
->tag
== DW_TAG_subprogram
8429 && (cu
->language
== language_cplus
8430 || cu
->language
== language_java
))
8432 struct type
*type
= read_type_die (die
, cu
);
8434 c_type_print_args (type
, buf
, 1, cu
->language
,
8435 &type_print_raw_options
);
8437 if (cu
->language
== language_java
)
8439 /* For java, we must append the return type to method
8441 if (die
->tag
== DW_TAG_subprogram
)
8442 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
8443 0, 0, &type_print_raw_options
);
8445 else if (cu
->language
== language_cplus
)
8447 /* Assume that an artificial first parameter is
8448 "this", but do not crash if it is not. RealView
8449 marks unnamed (and thus unused) parameters as
8450 artificial; there is no way to differentiate
8452 if (TYPE_NFIELDS (type
) > 0
8453 && TYPE_FIELD_ARTIFICIAL (type
, 0)
8454 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
8455 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
8457 fputs_unfiltered (" const", buf
);
8461 name
= ui_file_obsavestring (buf
, &objfile
->objfile_obstack
,
8463 ui_file_delete (buf
);
8465 if (cu
->language
== language_cplus
)
8468 = dwarf2_canonicalize_name (name
, cu
,
8469 &objfile
->objfile_obstack
);
8480 /* Return the fully qualified name of DIE, based on its DW_AT_name.
8481 If scope qualifiers are appropriate they will be added. The result
8482 will be allocated on the objfile_obstack, or NULL if the DIE does
8483 not have a name. NAME may either be from a previous call to
8484 dwarf2_name or NULL.
8486 The output string will be canonicalized (if C++/Java). */
8489 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
8491 return dwarf2_compute_name (name
, die
, cu
, 0);
8494 /* Construct a physname for the given DIE in CU. NAME may either be
8495 from a previous call to dwarf2_name or NULL. The result will be
8496 allocated on the objfile_objstack or NULL if the DIE does not have a
8499 The output string will be canonicalized (if C++/Java). */
8502 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
8504 struct objfile
*objfile
= cu
->objfile
;
8505 struct attribute
*attr
;
8506 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
8507 struct cleanup
*back_to
;
8510 /* In this case dwarf2_compute_name is just a shortcut not building anything
8512 if (!die_needs_namespace (die
, cu
))
8513 return dwarf2_compute_name (name
, die
, cu
, 1);
8515 back_to
= make_cleanup (null_cleanup
, NULL
);
8517 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
8519 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8521 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
8523 if (attr
&& DW_STRING (attr
))
8527 mangled
= DW_STRING (attr
);
8529 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
8530 type. It is easier for GDB users to search for such functions as
8531 `name(params)' than `long name(params)'. In such case the minimal
8532 symbol names do not match the full symbol names but for template
8533 functions there is never a need to look up their definition from their
8534 declaration so the only disadvantage remains the minimal symbol
8535 variant `long name(params)' does not have the proper inferior type.
8538 if (cu
->language
== language_go
)
8540 /* This is a lie, but we already lie to the caller new_symbol_full.
8541 new_symbol_full assumes we return the mangled name.
8542 This just undoes that lie until things are cleaned up. */
8547 demangled
= gdb_demangle (mangled
,
8548 (DMGL_PARAMS
| DMGL_ANSI
8549 | (cu
->language
== language_java
8550 ? DMGL_JAVA
| DMGL_RET_POSTFIX
8555 make_cleanup (xfree
, demangled
);
8565 if (canon
== NULL
|| check_physname
)
8567 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
8569 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
8571 /* It may not mean a bug in GDB. The compiler could also
8572 compute DW_AT_linkage_name incorrectly. But in such case
8573 GDB would need to be bug-to-bug compatible. */
8575 complaint (&symfile_complaints
,
8576 _("Computed physname <%s> does not match demangled <%s> "
8577 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
8578 physname
, canon
, mangled
, die
->offset
.sect_off
,
8579 objfile_name (objfile
));
8581 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
8582 is available here - over computed PHYSNAME. It is safer
8583 against both buggy GDB and buggy compilers. */
8597 retval
= obstack_copy0 (&objfile
->objfile_obstack
, retval
, strlen (retval
));
8599 do_cleanups (back_to
);
8603 /* Inspect DIE in CU for a namespace alias. If one exists, record
8604 a new symbol for it.
8606 Returns 1 if a namespace alias was recorded, 0 otherwise. */
8609 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
8611 struct attribute
*attr
;
8613 /* If the die does not have a name, this is not a namespace
8615 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
8619 struct die_info
*d
= die
;
8620 struct dwarf2_cu
*imported_cu
= cu
;
8622 /* If the compiler has nested DW_AT_imported_declaration DIEs,
8623 keep inspecting DIEs until we hit the underlying import. */
8624 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
8625 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
8627 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
8631 d
= follow_die_ref (d
, attr
, &imported_cu
);
8632 if (d
->tag
!= DW_TAG_imported_declaration
)
8636 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
8638 complaint (&symfile_complaints
,
8639 _("DIE at 0x%x has too many recursively imported "
8640 "declarations"), d
->offset
.sect_off
);
8647 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
8649 type
= get_die_type_at_offset (offset
, cu
->per_cu
);
8650 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
8652 /* This declaration is a global namespace alias. Add
8653 a symbol for it whose type is the aliased namespace. */
8654 new_symbol (die
, type
, cu
);
8663 /* Read the import statement specified by the given die and record it. */
8666 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
8668 struct objfile
*objfile
= cu
->objfile
;
8669 struct attribute
*import_attr
;
8670 struct die_info
*imported_die
, *child_die
;
8671 struct dwarf2_cu
*imported_cu
;
8672 const char *imported_name
;
8673 const char *imported_name_prefix
;
8674 const char *canonical_name
;
8675 const char *import_alias
;
8676 const char *imported_declaration
= NULL
;
8677 const char *import_prefix
;
8678 VEC (const_char_ptr
) *excludes
= NULL
;
8679 struct cleanup
*cleanups
;
8681 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8682 if (import_attr
== NULL
)
8684 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
8685 dwarf_tag_name (die
->tag
));
8690 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
8691 imported_name
= dwarf2_name (imported_die
, imported_cu
);
8692 if (imported_name
== NULL
)
8694 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
8696 The import in the following code:
8710 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
8711 <52> DW_AT_decl_file : 1
8712 <53> DW_AT_decl_line : 6
8713 <54> DW_AT_import : <0x75>
8714 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
8716 <5b> DW_AT_decl_file : 1
8717 <5c> DW_AT_decl_line : 2
8718 <5d> DW_AT_type : <0x6e>
8720 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
8721 <76> DW_AT_byte_size : 4
8722 <77> DW_AT_encoding : 5 (signed)
8724 imports the wrong die ( 0x75 instead of 0x58 ).
8725 This case will be ignored until the gcc bug is fixed. */
8729 /* Figure out the local name after import. */
8730 import_alias
= dwarf2_name (die
, cu
);
8732 /* Figure out where the statement is being imported to. */
8733 import_prefix
= determine_prefix (die
, cu
);
8735 /* Figure out what the scope of the imported die is and prepend it
8736 to the name of the imported die. */
8737 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
8739 if (imported_die
->tag
!= DW_TAG_namespace
8740 && imported_die
->tag
!= DW_TAG_module
)
8742 imported_declaration
= imported_name
;
8743 canonical_name
= imported_name_prefix
;
8745 else if (strlen (imported_name_prefix
) > 0)
8746 canonical_name
= obconcat (&objfile
->objfile_obstack
,
8747 imported_name_prefix
, "::", imported_name
,
8750 canonical_name
= imported_name
;
8752 cleanups
= make_cleanup (VEC_cleanup (const_char_ptr
), &excludes
);
8754 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
8755 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
8756 child_die
= sibling_die (child_die
))
8758 /* DWARF-4: A Fortran use statement with a “rename list” may be
8759 represented by an imported module entry with an import attribute
8760 referring to the module and owned entries corresponding to those
8761 entities that are renamed as part of being imported. */
8763 if (child_die
->tag
!= DW_TAG_imported_declaration
)
8765 complaint (&symfile_complaints
,
8766 _("child DW_TAG_imported_declaration expected "
8767 "- DIE at 0x%x [in module %s]"),
8768 child_die
->offset
.sect_off
, objfile_name (objfile
));
8772 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
8773 if (import_attr
== NULL
)
8775 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
8776 dwarf_tag_name (child_die
->tag
));
8781 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
8783 imported_name
= dwarf2_name (imported_die
, imported_cu
);
8784 if (imported_name
== NULL
)
8786 complaint (&symfile_complaints
,
8787 _("child DW_TAG_imported_declaration has unknown "
8788 "imported name - DIE at 0x%x [in module %s]"),
8789 child_die
->offset
.sect_off
, objfile_name (objfile
));
8793 VEC_safe_push (const_char_ptr
, excludes
, imported_name
);
8795 process_die (child_die
, cu
);
8798 cp_add_using_directive (import_prefix
,
8801 imported_declaration
,
8804 &objfile
->objfile_obstack
);
8806 do_cleanups (cleanups
);
8809 /* Cleanup function for handle_DW_AT_stmt_list. */
8812 free_cu_line_header (void *arg
)
8814 struct dwarf2_cu
*cu
= arg
;
8816 free_line_header (cu
->line_header
);
8817 cu
->line_header
= NULL
;
8820 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
8821 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
8822 this, it was first present in GCC release 4.3.0. */
8825 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
8827 if (!cu
->checked_producer
)
8828 check_producer (cu
);
8830 return cu
->producer_is_gcc_lt_4_3
;
8834 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
8835 const char **name
, const char **comp_dir
)
8837 struct attribute
*attr
;
8842 /* Find the filename. Do not use dwarf2_name here, since the filename
8843 is not a source language identifier. */
8844 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
8847 *name
= DW_STRING (attr
);
8850 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
8852 *comp_dir
= DW_STRING (attr
);
8853 else if (producer_is_gcc_lt_4_3 (cu
) && *name
!= NULL
8854 && IS_ABSOLUTE_PATH (*name
))
8856 char *d
= ldirname (*name
);
8860 make_cleanup (xfree
, d
);
8862 if (*comp_dir
!= NULL
)
8864 /* Irix 6.2 native cc prepends <machine>.: to the compilation
8865 directory, get rid of it. */
8866 char *cp
= strchr (*comp_dir
, ':');
8868 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
8873 *name
= "<unknown>";
8876 /* Handle DW_AT_stmt_list for a compilation unit.
8877 DIE is the DW_TAG_compile_unit die for CU.
8878 COMP_DIR is the compilation directory.
8879 WANT_LINE_INFO is non-zero if the pc/line-number mapping is needed. */
8882 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
8883 const char *comp_dir
) /* ARI: editCase function */
8885 struct attribute
*attr
;
8887 gdb_assert (! cu
->per_cu
->is_debug_types
);
8889 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
8892 unsigned int line_offset
= DW_UNSND (attr
);
8893 struct line_header
*line_header
8894 = dwarf_decode_line_header (line_offset
, cu
);
8898 cu
->line_header
= line_header
;
8899 make_cleanup (free_cu_line_header
, cu
);
8900 dwarf_decode_lines (line_header
, comp_dir
, cu
, NULL
, 1);
8905 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
8908 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
8910 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8911 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
8912 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
8913 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
8914 struct attribute
*attr
;
8915 const char *name
= NULL
;
8916 const char *comp_dir
= NULL
;
8917 struct die_info
*child_die
;
8918 bfd
*abfd
= objfile
->obfd
;
8921 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8923 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
8925 /* If we didn't find a lowpc, set it to highpc to avoid complaints
8926 from finish_block. */
8927 if (lowpc
== ((CORE_ADDR
) -1))
8932 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
8934 prepare_one_comp_unit (cu
, die
, cu
->language
);
8936 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
8937 standardised yet. As a workaround for the language detection we fall
8938 back to the DW_AT_producer string. */
8939 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
8940 cu
->language
= language_opencl
;
8942 /* Similar hack for Go. */
8943 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
8944 set_cu_language (DW_LANG_Go
, cu
);
8946 dwarf2_start_symtab (cu
, name
, comp_dir
, lowpc
);
8948 /* Decode line number information if present. We do this before
8949 processing child DIEs, so that the line header table is available
8950 for DW_AT_decl_file. */
8951 handle_DW_AT_stmt_list (die
, cu
, comp_dir
);
8953 /* Process all dies in compilation unit. */
8954 if (die
->child
!= NULL
)
8956 child_die
= die
->child
;
8957 while (child_die
&& child_die
->tag
)
8959 process_die (child_die
, cu
);
8960 child_die
= sibling_die (child_die
);
8964 /* Decode macro information, if present. Dwarf 2 macro information
8965 refers to information in the line number info statement program
8966 header, so we can only read it if we've read the header
8968 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
8969 if (attr
&& cu
->line_header
)
8971 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
8972 complaint (&symfile_complaints
,
8973 _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
8975 dwarf_decode_macros (cu
, DW_UNSND (attr
), comp_dir
, 1);
8979 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
8980 if (attr
&& cu
->line_header
)
8982 unsigned int macro_offset
= DW_UNSND (attr
);
8984 dwarf_decode_macros (cu
, macro_offset
, comp_dir
, 0);
8988 do_cleanups (back_to
);
8991 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
8992 Create the set of symtabs used by this TU, or if this TU is sharing
8993 symtabs with another TU and the symtabs have already been created
8994 then restore those symtabs in the line header.
8995 We don't need the pc/line-number mapping for type units. */
8998 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
9000 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9001 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
9002 struct type_unit_group
*tu_group
;
9004 struct line_header
*lh
;
9005 struct attribute
*attr
;
9006 unsigned int i
, line_offset
;
9007 struct signatured_type
*sig_type
;
9009 gdb_assert (per_cu
->is_debug_types
);
9010 sig_type
= (struct signatured_type
*) per_cu
;
9012 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9014 /* If we're using .gdb_index (includes -readnow) then
9015 per_cu->type_unit_group may not have been set up yet. */
9016 if (sig_type
->type_unit_group
== NULL
)
9017 sig_type
->type_unit_group
= get_type_unit_group (cu
, attr
);
9018 tu_group
= sig_type
->type_unit_group
;
9020 /* If we've already processed this stmt_list there's no real need to
9021 do it again, we could fake it and just recreate the part we need
9022 (file name,index -> symtab mapping). If data shows this optimization
9023 is useful we can do it then. */
9024 first_time
= tu_group
->primary_symtab
== NULL
;
9026 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
9031 line_offset
= DW_UNSND (attr
);
9032 lh
= dwarf_decode_line_header (line_offset
, cu
);
9037 dwarf2_start_symtab (cu
, "", NULL
, 0);
9040 gdb_assert (tu_group
->symtabs
== NULL
);
9043 /* Note: The primary symtab will get allocated at the end. */
9047 cu
->line_header
= lh
;
9048 make_cleanup (free_cu_line_header
, cu
);
9052 dwarf2_start_symtab (cu
, "", NULL
, 0);
9054 tu_group
->num_symtabs
= lh
->num_file_names
;
9055 tu_group
->symtabs
= XNEWVEC (struct symtab
*, lh
->num_file_names
);
9057 for (i
= 0; i
< lh
->num_file_names
; ++i
)
9059 const char *dir
= NULL
;
9060 struct file_entry
*fe
= &lh
->file_names
[i
];
9063 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
9064 dwarf2_start_subfile (fe
->name
, dir
, NULL
);
9066 /* Note: We don't have to watch for the main subfile here, type units
9067 don't have DW_AT_name. */
9069 if (current_subfile
->symtab
== NULL
)
9071 /* NOTE: start_subfile will recognize when it's been passed
9072 a file it has already seen. So we can't assume there's a
9073 simple mapping from lh->file_names to subfiles,
9074 lh->file_names may contain dups. */
9075 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
9079 fe
->symtab
= current_subfile
->symtab
;
9080 tu_group
->symtabs
[i
] = fe
->symtab
;
9087 for (i
= 0; i
< lh
->num_file_names
; ++i
)
9089 struct file_entry
*fe
= &lh
->file_names
[i
];
9091 fe
->symtab
= tu_group
->symtabs
[i
];
9095 /* The main symtab is allocated last. Type units don't have DW_AT_name
9096 so they don't have a "real" (so to speak) symtab anyway.
9097 There is later code that will assign the main symtab to all symbols
9098 that don't have one. We need to handle the case of a symbol with a
9099 missing symtab (DW_AT_decl_file) anyway. */
9102 /* Process DW_TAG_type_unit.
9103 For TUs we want to skip the first top level sibling if it's not the
9104 actual type being defined by this TU. In this case the first top
9105 level sibling is there to provide context only. */
9108 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9110 struct die_info
*child_die
;
9112 prepare_one_comp_unit (cu
, die
, language_minimal
);
9114 /* Initialize (or reinitialize) the machinery for building symtabs.
9115 We do this before processing child DIEs, so that the line header table
9116 is available for DW_AT_decl_file. */
9117 setup_type_unit_groups (die
, cu
);
9119 if (die
->child
!= NULL
)
9121 child_die
= die
->child
;
9122 while (child_die
&& child_die
->tag
)
9124 process_die (child_die
, cu
);
9125 child_die
= sibling_die (child_die
);
9132 http://gcc.gnu.org/wiki/DebugFission
9133 http://gcc.gnu.org/wiki/DebugFissionDWP
9135 To simplify handling of both DWO files ("object" files with the DWARF info)
9136 and DWP files (a file with the DWOs packaged up into one file), we treat
9137 DWP files as having a collection of virtual DWO files. */
9140 hash_dwo_file (const void *item
)
9142 const struct dwo_file
*dwo_file
= item
;
9145 hash
= htab_hash_string (dwo_file
->dwo_name
);
9146 if (dwo_file
->comp_dir
!= NULL
)
9147 hash
+= htab_hash_string (dwo_file
->comp_dir
);
9152 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
9154 const struct dwo_file
*lhs
= item_lhs
;
9155 const struct dwo_file
*rhs
= item_rhs
;
9157 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
9159 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
9160 return lhs
->comp_dir
== rhs
->comp_dir
;
9161 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
9164 /* Allocate a hash table for DWO files. */
9167 allocate_dwo_file_hash_table (void)
9169 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9171 return htab_create_alloc_ex (41,
9175 &objfile
->objfile_obstack
,
9176 hashtab_obstack_allocate
,
9177 dummy_obstack_deallocate
);
9180 /* Lookup DWO file DWO_NAME. */
9183 lookup_dwo_file_slot (const char *dwo_name
, const char *comp_dir
)
9185 struct dwo_file find_entry
;
9188 if (dwarf2_per_objfile
->dwo_files
== NULL
)
9189 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
9191 memset (&find_entry
, 0, sizeof (find_entry
));
9192 find_entry
.dwo_name
= dwo_name
;
9193 find_entry
.comp_dir
= comp_dir
;
9194 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
9200 hash_dwo_unit (const void *item
)
9202 const struct dwo_unit
*dwo_unit
= item
;
9204 /* This drops the top 32 bits of the id, but is ok for a hash. */
9205 return dwo_unit
->signature
;
9209 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
9211 const struct dwo_unit
*lhs
= item_lhs
;
9212 const struct dwo_unit
*rhs
= item_rhs
;
9214 /* The signature is assumed to be unique within the DWO file.
9215 So while object file CU dwo_id's always have the value zero,
9216 that's OK, assuming each object file DWO file has only one CU,
9217 and that's the rule for now. */
9218 return lhs
->signature
== rhs
->signature
;
9221 /* Allocate a hash table for DWO CUs,TUs.
9222 There is one of these tables for each of CUs,TUs for each DWO file. */
9225 allocate_dwo_unit_table (struct objfile
*objfile
)
9227 /* Start out with a pretty small number.
9228 Generally DWO files contain only one CU and maybe some TUs. */
9229 return htab_create_alloc_ex (3,
9233 &objfile
->objfile_obstack
,
9234 hashtab_obstack_allocate
,
9235 dummy_obstack_deallocate
);
9238 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
9240 struct create_dwo_cu_data
9242 struct dwo_file
*dwo_file
;
9243 struct dwo_unit dwo_unit
;
9246 /* die_reader_func for create_dwo_cu. */
9249 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
9250 const gdb_byte
*info_ptr
,
9251 struct die_info
*comp_unit_die
,
9255 struct dwarf2_cu
*cu
= reader
->cu
;
9256 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9257 sect_offset offset
= cu
->per_cu
->offset
;
9258 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
9259 struct create_dwo_cu_data
*data
= datap
;
9260 struct dwo_file
*dwo_file
= data
->dwo_file
;
9261 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
9262 struct attribute
*attr
;
9264 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
9267 complaint (&symfile_complaints
,
9268 _("Dwarf Error: debug entry at offset 0x%x is missing"
9269 " its dwo_id [in module %s]"),
9270 offset
.sect_off
, dwo_file
->dwo_name
);
9274 dwo_unit
->dwo_file
= dwo_file
;
9275 dwo_unit
->signature
= DW_UNSND (attr
);
9276 dwo_unit
->section
= section
;
9277 dwo_unit
->offset
= offset
;
9278 dwo_unit
->length
= cu
->per_cu
->length
;
9280 if (dwarf2_read_debug
)
9281 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, dwo_id %s\n",
9282 offset
.sect_off
, hex_string (dwo_unit
->signature
));
9285 /* Create the dwo_unit for the lone CU in DWO_FILE.
9286 Note: This function processes DWO files only, not DWP files. */
9288 static struct dwo_unit
*
9289 create_dwo_cu (struct dwo_file
*dwo_file
)
9291 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9292 struct dwarf2_section_info
*section
= &dwo_file
->sections
.info
;
9295 const gdb_byte
*info_ptr
, *end_ptr
;
9296 struct create_dwo_cu_data create_dwo_cu_data
;
9297 struct dwo_unit
*dwo_unit
;
9299 dwarf2_read_section (objfile
, section
);
9300 info_ptr
= section
->buffer
;
9302 if (info_ptr
== NULL
)
9305 /* We can't set abfd until now because the section may be empty or
9306 not present, in which case section->asection will be NULL. */
9307 abfd
= get_section_bfd_owner (section
);
9309 if (dwarf2_read_debug
)
9311 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
9312 get_section_name (section
),
9313 get_section_file_name (section
));
9316 create_dwo_cu_data
.dwo_file
= dwo_file
;
9319 end_ptr
= info_ptr
+ section
->size
;
9320 while (info_ptr
< end_ptr
)
9322 struct dwarf2_per_cu_data per_cu
;
9324 memset (&create_dwo_cu_data
.dwo_unit
, 0,
9325 sizeof (create_dwo_cu_data
.dwo_unit
));
9326 memset (&per_cu
, 0, sizeof (per_cu
));
9327 per_cu
.objfile
= objfile
;
9328 per_cu
.is_debug_types
= 0;
9329 per_cu
.offset
.sect_off
= info_ptr
- section
->buffer
;
9330 per_cu
.section
= section
;
9332 init_cutu_and_read_dies_no_follow (&per_cu
, dwo_file
,
9333 create_dwo_cu_reader
,
9334 &create_dwo_cu_data
);
9336 if (create_dwo_cu_data
.dwo_unit
.dwo_file
!= NULL
)
9338 /* If we've already found one, complain. We only support one
9339 because having more than one requires hacking the dwo_name of
9340 each to match, which is highly unlikely to happen. */
9341 if (dwo_unit
!= NULL
)
9343 complaint (&symfile_complaints
,
9344 _("Multiple CUs in DWO file %s [in module %s]"),
9345 dwo_file
->dwo_name
, objfile_name (objfile
));
9349 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
9350 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
9353 info_ptr
+= per_cu
.length
;
9359 /* DWP file .debug_{cu,tu}_index section format:
9360 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
9364 Both index sections have the same format, and serve to map a 64-bit
9365 signature to a set of section numbers. Each section begins with a header,
9366 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
9367 indexes, and a pool of 32-bit section numbers. The index sections will be
9368 aligned at 8-byte boundaries in the file.
9370 The index section header consists of:
9372 V, 32 bit version number
9374 N, 32 bit number of compilation units or type units in the index
9375 M, 32 bit number of slots in the hash table
9377 Numbers are recorded using the byte order of the application binary.
9379 The hash table begins at offset 16 in the section, and consists of an array
9380 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
9381 order of the application binary). Unused slots in the hash table are 0.
9382 (We rely on the extreme unlikeliness of a signature being exactly 0.)
9384 The parallel table begins immediately after the hash table
9385 (at offset 16 + 8 * M from the beginning of the section), and consists of an
9386 array of 32-bit indexes (using the byte order of the application binary),
9387 corresponding 1-1 with slots in the hash table. Each entry in the parallel
9388 table contains a 32-bit index into the pool of section numbers. For unused
9389 hash table slots, the corresponding entry in the parallel table will be 0.
9391 The pool of section numbers begins immediately following the hash table
9392 (at offset 16 + 12 * M from the beginning of the section). The pool of
9393 section numbers consists of an array of 32-bit words (using the byte order
9394 of the application binary). Each item in the array is indexed starting
9395 from 0. The hash table entry provides the index of the first section
9396 number in the set. Additional section numbers in the set follow, and the
9397 set is terminated by a 0 entry (section number 0 is not used in ELF).
9399 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
9400 section must be the first entry in the set, and the .debug_abbrev.dwo must
9401 be the second entry. Other members of the set may follow in any order.
9407 DWP Version 2 combines all the .debug_info, etc. sections into one,
9408 and the entries in the index tables are now offsets into these sections.
9409 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
9412 Index Section Contents:
9414 Hash Table of Signatures dwp_hash_table.hash_table
9415 Parallel Table of Indices dwp_hash_table.unit_table
9416 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
9417 Table of Section Sizes dwp_hash_table.v2.sizes
9419 The index section header consists of:
9421 V, 32 bit version number
9422 L, 32 bit number of columns in the table of section offsets
9423 N, 32 bit number of compilation units or type units in the index
9424 M, 32 bit number of slots in the hash table
9426 Numbers are recorded using the byte order of the application binary.
9428 The hash table has the same format as version 1.
9429 The parallel table of indices has the same format as version 1,
9430 except that the entries are origin-1 indices into the table of sections
9431 offsets and the table of section sizes.
9433 The table of offsets begins immediately following the parallel table
9434 (at offset 16 + 12 * M from the beginning of the section). The table is
9435 a two-dimensional array of 32-bit words (using the byte order of the
9436 application binary), with L columns and N+1 rows, in row-major order.
9437 Each row in the array is indexed starting from 0. The first row provides
9438 a key to the remaining rows: each column in this row provides an identifier
9439 for a debug section, and the offsets in the same column of subsequent rows
9440 refer to that section. The section identifiers are:
9442 DW_SECT_INFO 1 .debug_info.dwo
9443 DW_SECT_TYPES 2 .debug_types.dwo
9444 DW_SECT_ABBREV 3 .debug_abbrev.dwo
9445 DW_SECT_LINE 4 .debug_line.dwo
9446 DW_SECT_LOC 5 .debug_loc.dwo
9447 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
9448 DW_SECT_MACINFO 7 .debug_macinfo.dwo
9449 DW_SECT_MACRO 8 .debug_macro.dwo
9451 The offsets provided by the CU and TU index sections are the base offsets
9452 for the contributions made by each CU or TU to the corresponding section
9453 in the package file. Each CU and TU header contains an abbrev_offset
9454 field, used to find the abbreviations table for that CU or TU within the
9455 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
9456 be interpreted as relative to the base offset given in the index section.
9457 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
9458 should be interpreted as relative to the base offset for .debug_line.dwo,
9459 and offsets into other debug sections obtained from DWARF attributes should
9460 also be interpreted as relative to the corresponding base offset.
9462 The table of sizes begins immediately following the table of offsets.
9463 Like the table of offsets, it is a two-dimensional array of 32-bit words,
9464 with L columns and N rows, in row-major order. Each row in the array is
9465 indexed starting from 1 (row 0 is shared by the two tables).
9469 Hash table lookup is handled the same in version 1 and 2:
9471 We assume that N and M will not exceed 2^32 - 1.
9472 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
9474 Given a 64-bit compilation unit signature or a type signature S, an entry
9475 in the hash table is located as follows:
9477 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
9478 the low-order k bits all set to 1.
9480 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
9482 3) If the hash table entry at index H matches the signature, use that
9483 entry. If the hash table entry at index H is unused (all zeroes),
9484 terminate the search: the signature is not present in the table.
9486 4) Let H = (H + H') modulo M. Repeat at Step 3.
9488 Because M > N and H' and M are relatively prime, the search is guaranteed
9489 to stop at an unused slot or find the match. */
9491 /* Create a hash table to map DWO IDs to their CU/TU entry in
9492 .debug_{info,types}.dwo in DWP_FILE.
9493 Returns NULL if there isn't one.
9494 Note: This function processes DWP files only, not DWO files. */
9496 static struct dwp_hash_table
*
9497 create_dwp_hash_table (struct dwp_file
*dwp_file
, int is_debug_types
)
9499 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9500 bfd
*dbfd
= dwp_file
->dbfd
;
9501 const gdb_byte
*index_ptr
, *index_end
;
9502 struct dwarf2_section_info
*index
;
9503 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
9504 struct dwp_hash_table
*htab
;
9507 index
= &dwp_file
->sections
.tu_index
;
9509 index
= &dwp_file
->sections
.cu_index
;
9511 if (dwarf2_section_empty_p (index
))
9513 dwarf2_read_section (objfile
, index
);
9515 index_ptr
= index
->buffer
;
9516 index_end
= index_ptr
+ index
->size
;
9518 version
= read_4_bytes (dbfd
, index_ptr
);
9521 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
9525 nr_units
= read_4_bytes (dbfd
, index_ptr
);
9527 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
9530 if (version
!= 1 && version
!= 2)
9532 error (_("Dwarf Error: unsupported DWP file version (%s)"
9534 pulongest (version
), dwp_file
->name
);
9536 if (nr_slots
!= (nr_slots
& -nr_slots
))
9538 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
9539 " is not power of 2 [in module %s]"),
9540 pulongest (nr_slots
), dwp_file
->name
);
9543 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
9544 htab
->version
= version
;
9545 htab
->nr_columns
= nr_columns
;
9546 htab
->nr_units
= nr_units
;
9547 htab
->nr_slots
= nr_slots
;
9548 htab
->hash_table
= index_ptr
;
9549 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
9551 /* Exit early if the table is empty. */
9552 if (nr_slots
== 0 || nr_units
== 0
9553 || (version
== 2 && nr_columns
== 0))
9555 /* All must be zero. */
9556 if (nr_slots
!= 0 || nr_units
!= 0
9557 || (version
== 2 && nr_columns
!= 0))
9559 complaint (&symfile_complaints
,
9560 _("Empty DWP but nr_slots,nr_units,nr_columns not"
9561 " all zero [in modules %s]"),
9569 htab
->section_pool
.v1
.indices
=
9570 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
9571 /* It's harder to decide whether the section is too small in v1.
9572 V1 is deprecated anyway so we punt. */
9576 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
9577 int *ids
= htab
->section_pool
.v2
.section_ids
;
9578 /* Reverse map for error checking. */
9579 int ids_seen
[DW_SECT_MAX
+ 1];
9584 error (_("Dwarf Error: bad DWP hash table, too few columns"
9585 " in section table [in module %s]"),
9588 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
9590 error (_("Dwarf Error: bad DWP hash table, too many columns"
9591 " in section table [in module %s]"),
9594 memset (ids
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
9595 memset (ids_seen
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
9596 for (i
= 0; i
< nr_columns
; ++i
)
9598 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
9600 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
9602 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
9603 " in section table [in module %s]"),
9604 id
, dwp_file
->name
);
9606 if (ids_seen
[id
] != -1)
9608 error (_("Dwarf Error: bad DWP hash table, duplicate section"
9609 " id %d in section table [in module %s]"),
9610 id
, dwp_file
->name
);
9615 /* Must have exactly one info or types section. */
9616 if (((ids_seen
[DW_SECT_INFO
] != -1)
9617 + (ids_seen
[DW_SECT_TYPES
] != -1))
9620 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
9621 " DWO info/types section [in module %s]"),
9624 /* Must have an abbrev section. */
9625 if (ids_seen
[DW_SECT_ABBREV
] == -1)
9627 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
9628 " section [in module %s]"),
9631 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
9632 htab
->section_pool
.v2
.sizes
=
9633 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
9634 * nr_units
* nr_columns
);
9635 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
9636 * nr_units
* nr_columns
))
9639 error (_("Dwarf Error: DWP index section is corrupt (too small)"
9648 /* Update SECTIONS with the data from SECTP.
9650 This function is like the other "locate" section routines that are
9651 passed to bfd_map_over_sections, but in this context the sections to
9652 read comes from the DWP V1 hash table, not the full ELF section table.
9654 The result is non-zero for success, or zero if an error was found. */
9657 locate_v1_virtual_dwo_sections (asection
*sectp
,
9658 struct virtual_v1_dwo_sections
*sections
)
9660 const struct dwop_section_names
*names
= &dwop_section_names
;
9662 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
9664 /* There can be only one. */
9665 if (sections
->abbrev
.s
.asection
!= NULL
)
9667 sections
->abbrev
.s
.asection
= sectp
;
9668 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
9670 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
9671 || section_is_p (sectp
->name
, &names
->types_dwo
))
9673 /* There can be only one. */
9674 if (sections
->info_or_types
.s
.asection
!= NULL
)
9676 sections
->info_or_types
.s
.asection
= sectp
;
9677 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
9679 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
9681 /* There can be only one. */
9682 if (sections
->line
.s
.asection
!= NULL
)
9684 sections
->line
.s
.asection
= sectp
;
9685 sections
->line
.size
= bfd_get_section_size (sectp
);
9687 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
9689 /* There can be only one. */
9690 if (sections
->loc
.s
.asection
!= NULL
)
9692 sections
->loc
.s
.asection
= sectp
;
9693 sections
->loc
.size
= bfd_get_section_size (sectp
);
9695 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
9697 /* There can be only one. */
9698 if (sections
->macinfo
.s
.asection
!= NULL
)
9700 sections
->macinfo
.s
.asection
= sectp
;
9701 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
9703 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
9705 /* There can be only one. */
9706 if (sections
->macro
.s
.asection
!= NULL
)
9708 sections
->macro
.s
.asection
= sectp
;
9709 sections
->macro
.size
= bfd_get_section_size (sectp
);
9711 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
9713 /* There can be only one. */
9714 if (sections
->str_offsets
.s
.asection
!= NULL
)
9716 sections
->str_offsets
.s
.asection
= sectp
;
9717 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
9721 /* No other kind of section is valid. */
9728 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
9729 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
9730 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
9731 This is for DWP version 1 files. */
9733 static struct dwo_unit
*
9734 create_dwo_unit_in_dwp_v1 (struct dwp_file
*dwp_file
,
9735 uint32_t unit_index
,
9736 const char *comp_dir
,
9737 ULONGEST signature
, int is_debug_types
)
9739 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9740 const struct dwp_hash_table
*dwp_htab
=
9741 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
9742 bfd
*dbfd
= dwp_file
->dbfd
;
9743 const char *kind
= is_debug_types
? "TU" : "CU";
9744 struct dwo_file
*dwo_file
;
9745 struct dwo_unit
*dwo_unit
;
9746 struct virtual_v1_dwo_sections sections
;
9747 void **dwo_file_slot
;
9748 char *virtual_dwo_name
;
9749 struct dwarf2_section_info
*cutu
;
9750 struct cleanup
*cleanups
;
9753 gdb_assert (dwp_file
->version
== 1);
9755 if (dwarf2_read_debug
)
9757 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
9759 pulongest (unit_index
), hex_string (signature
),
9763 /* Fetch the sections of this DWO unit.
9764 Put a limit on the number of sections we look for so that bad data
9765 doesn't cause us to loop forever. */
9767 #define MAX_NR_V1_DWO_SECTIONS \
9768 (1 /* .debug_info or .debug_types */ \
9769 + 1 /* .debug_abbrev */ \
9770 + 1 /* .debug_line */ \
9771 + 1 /* .debug_loc */ \
9772 + 1 /* .debug_str_offsets */ \
9773 + 1 /* .debug_macro or .debug_macinfo */ \
9774 + 1 /* trailing zero */)
9776 memset (§ions
, 0, sizeof (sections
));
9777 cleanups
= make_cleanup (null_cleanup
, 0);
9779 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
9782 uint32_t section_nr
=
9784 dwp_htab
->section_pool
.v1
.indices
9785 + (unit_index
+ i
) * sizeof (uint32_t));
9787 if (section_nr
== 0)
9789 if (section_nr
>= dwp_file
->num_sections
)
9791 error (_("Dwarf Error: bad DWP hash table, section number too large"
9796 sectp
= dwp_file
->elf_sections
[section_nr
];
9797 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
9799 error (_("Dwarf Error: bad DWP hash table, invalid section found"
9806 || dwarf2_section_empty_p (§ions
.info_or_types
)
9807 || dwarf2_section_empty_p (§ions
.abbrev
))
9809 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
9813 if (i
== MAX_NR_V1_DWO_SECTIONS
)
9815 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
9820 /* It's easier for the rest of the code if we fake a struct dwo_file and
9821 have dwo_unit "live" in that. At least for now.
9823 The DWP file can be made up of a random collection of CUs and TUs.
9824 However, for each CU + set of TUs that came from the same original DWO
9825 file, we can combine them back into a virtual DWO file to save space
9826 (fewer struct dwo_file objects to allocate). Remember that for really
9827 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
9830 xstrprintf ("virtual-dwo/%d-%d-%d-%d",
9831 get_section_id (§ions
.abbrev
),
9832 get_section_id (§ions
.line
),
9833 get_section_id (§ions
.loc
),
9834 get_section_id (§ions
.str_offsets
));
9835 make_cleanup (xfree
, virtual_dwo_name
);
9836 /* Can we use an existing virtual DWO file? */
9837 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
9838 /* Create one if necessary. */
9839 if (*dwo_file_slot
== NULL
)
9841 if (dwarf2_read_debug
)
9843 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
9846 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
9847 dwo_file
->dwo_name
= obstack_copy0 (&objfile
->objfile_obstack
,
9849 strlen (virtual_dwo_name
));
9850 dwo_file
->comp_dir
= comp_dir
;
9851 dwo_file
->sections
.abbrev
= sections
.abbrev
;
9852 dwo_file
->sections
.line
= sections
.line
;
9853 dwo_file
->sections
.loc
= sections
.loc
;
9854 dwo_file
->sections
.macinfo
= sections
.macinfo
;
9855 dwo_file
->sections
.macro
= sections
.macro
;
9856 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
9857 /* The "str" section is global to the entire DWP file. */
9858 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
9859 /* The info or types section is assigned below to dwo_unit,
9860 there's no need to record it in dwo_file.
9861 Also, we can't simply record type sections in dwo_file because
9862 we record a pointer into the vector in dwo_unit. As we collect more
9863 types we'll grow the vector and eventually have to reallocate space
9864 for it, invalidating all copies of pointers into the previous
9866 *dwo_file_slot
= dwo_file
;
9870 if (dwarf2_read_debug
)
9872 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
9875 dwo_file
= *dwo_file_slot
;
9877 do_cleanups (cleanups
);
9879 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
9880 dwo_unit
->dwo_file
= dwo_file
;
9881 dwo_unit
->signature
= signature
;
9882 dwo_unit
->section
= obstack_alloc (&objfile
->objfile_obstack
,
9883 sizeof (struct dwarf2_section_info
));
9884 *dwo_unit
->section
= sections
.info_or_types
;
9885 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
9890 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
9891 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
9892 piece within that section used by a TU/CU, return a virtual section
9893 of just that piece. */
9895 static struct dwarf2_section_info
9896 create_dwp_v2_section (struct dwarf2_section_info
*section
,
9897 bfd_size_type offset
, bfd_size_type size
)
9899 struct dwarf2_section_info result
;
9902 gdb_assert (section
!= NULL
);
9903 gdb_assert (!section
->is_virtual
);
9905 memset (&result
, 0, sizeof (result
));
9906 result
.s
.containing_section
= section
;
9907 result
.is_virtual
= 1;
9912 sectp
= get_section_bfd_section (section
);
9914 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
9915 bounds of the real section. This is a pretty-rare event, so just
9916 flag an error (easier) instead of a warning and trying to cope. */
9918 || offset
+ size
> bfd_get_section_size (sectp
))
9920 bfd
*abfd
= sectp
->owner
;
9922 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
9923 " in section %s [in module %s]"),
9924 sectp
? bfd_section_name (abfd
, sectp
) : "<unknown>",
9925 objfile_name (dwarf2_per_objfile
->objfile
));
9928 result
.virtual_offset
= offset
;
9933 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
9934 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
9935 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
9936 This is for DWP version 2 files. */
9938 static struct dwo_unit
*
9939 create_dwo_unit_in_dwp_v2 (struct dwp_file
*dwp_file
,
9940 uint32_t unit_index
,
9941 const char *comp_dir
,
9942 ULONGEST signature
, int is_debug_types
)
9944 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9945 const struct dwp_hash_table
*dwp_htab
=
9946 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
9947 bfd
*dbfd
= dwp_file
->dbfd
;
9948 const char *kind
= is_debug_types
? "TU" : "CU";
9949 struct dwo_file
*dwo_file
;
9950 struct dwo_unit
*dwo_unit
;
9951 struct virtual_v2_dwo_sections sections
;
9952 void **dwo_file_slot
;
9953 char *virtual_dwo_name
;
9954 struct dwarf2_section_info
*cutu
;
9955 struct cleanup
*cleanups
;
9958 gdb_assert (dwp_file
->version
== 2);
9960 if (dwarf2_read_debug
)
9962 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
9964 pulongest (unit_index
), hex_string (signature
),
9968 /* Fetch the section offsets of this DWO unit. */
9970 memset (§ions
, 0, sizeof (sections
));
9971 cleanups
= make_cleanup (null_cleanup
, 0);
9973 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
9975 uint32_t offset
= read_4_bytes (dbfd
,
9976 dwp_htab
->section_pool
.v2
.offsets
9977 + (((unit_index
- 1) * dwp_htab
->nr_columns
9979 * sizeof (uint32_t)));
9980 uint32_t size
= read_4_bytes (dbfd
,
9981 dwp_htab
->section_pool
.v2
.sizes
9982 + (((unit_index
- 1) * dwp_htab
->nr_columns
9984 * sizeof (uint32_t)));
9986 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
9990 sections
.info_or_types_offset
= offset
;
9991 sections
.info_or_types_size
= size
;
9993 case DW_SECT_ABBREV
:
9994 sections
.abbrev_offset
= offset
;
9995 sections
.abbrev_size
= size
;
9998 sections
.line_offset
= offset
;
9999 sections
.line_size
= size
;
10002 sections
.loc_offset
= offset
;
10003 sections
.loc_size
= size
;
10005 case DW_SECT_STR_OFFSETS
:
10006 sections
.str_offsets_offset
= offset
;
10007 sections
.str_offsets_size
= size
;
10009 case DW_SECT_MACINFO
:
10010 sections
.macinfo_offset
= offset
;
10011 sections
.macinfo_size
= size
;
10013 case DW_SECT_MACRO
:
10014 sections
.macro_offset
= offset
;
10015 sections
.macro_size
= size
;
10020 /* It's easier for the rest of the code if we fake a struct dwo_file and
10021 have dwo_unit "live" in that. At least for now.
10023 The DWP file can be made up of a random collection of CUs and TUs.
10024 However, for each CU + set of TUs that came from the same original DWO
10025 file, we can combine them back into a virtual DWO file to save space
10026 (fewer struct dwo_file objects to allocate). Remember that for really
10027 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10030 xstrprintf ("virtual-dwo/%ld-%ld-%ld-%ld",
10031 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
10032 (long) (sections
.line_size
? sections
.line_offset
: 0),
10033 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
10034 (long) (sections
.str_offsets_size
10035 ? sections
.str_offsets_offset
: 0));
10036 make_cleanup (xfree
, virtual_dwo_name
);
10037 /* Can we use an existing virtual DWO file? */
10038 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
10039 /* Create one if necessary. */
10040 if (*dwo_file_slot
== NULL
)
10042 if (dwarf2_read_debug
)
10044 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
10047 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10048 dwo_file
->dwo_name
= obstack_copy0 (&objfile
->objfile_obstack
,
10050 strlen (virtual_dwo_name
));
10051 dwo_file
->comp_dir
= comp_dir
;
10052 dwo_file
->sections
.abbrev
=
10053 create_dwp_v2_section (&dwp_file
->sections
.abbrev
,
10054 sections
.abbrev_offset
, sections
.abbrev_size
);
10055 dwo_file
->sections
.line
=
10056 create_dwp_v2_section (&dwp_file
->sections
.line
,
10057 sections
.line_offset
, sections
.line_size
);
10058 dwo_file
->sections
.loc
=
10059 create_dwp_v2_section (&dwp_file
->sections
.loc
,
10060 sections
.loc_offset
, sections
.loc_size
);
10061 dwo_file
->sections
.macinfo
=
10062 create_dwp_v2_section (&dwp_file
->sections
.macinfo
,
10063 sections
.macinfo_offset
, sections
.macinfo_size
);
10064 dwo_file
->sections
.macro
=
10065 create_dwp_v2_section (&dwp_file
->sections
.macro
,
10066 sections
.macro_offset
, sections
.macro_size
);
10067 dwo_file
->sections
.str_offsets
=
10068 create_dwp_v2_section (&dwp_file
->sections
.str_offsets
,
10069 sections
.str_offsets_offset
,
10070 sections
.str_offsets_size
);
10071 /* The "str" section is global to the entire DWP file. */
10072 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10073 /* The info or types section is assigned below to dwo_unit,
10074 there's no need to record it in dwo_file.
10075 Also, we can't simply record type sections in dwo_file because
10076 we record a pointer into the vector in dwo_unit. As we collect more
10077 types we'll grow the vector and eventually have to reallocate space
10078 for it, invalidating all copies of pointers into the previous
10080 *dwo_file_slot
= dwo_file
;
10084 if (dwarf2_read_debug
)
10086 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10089 dwo_file
= *dwo_file_slot
;
10091 do_cleanups (cleanups
);
10093 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10094 dwo_unit
->dwo_file
= dwo_file
;
10095 dwo_unit
->signature
= signature
;
10096 dwo_unit
->section
= obstack_alloc (&objfile
->objfile_obstack
,
10097 sizeof (struct dwarf2_section_info
));
10098 *dwo_unit
->section
= create_dwp_v2_section (is_debug_types
10099 ? &dwp_file
->sections
.types
10100 : &dwp_file
->sections
.info
,
10101 sections
.info_or_types_offset
,
10102 sections
.info_or_types_size
);
10103 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10108 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
10109 Returns NULL if the signature isn't found. */
10111 static struct dwo_unit
*
10112 lookup_dwo_unit_in_dwp (struct dwp_file
*dwp_file
, const char *comp_dir
,
10113 ULONGEST signature
, int is_debug_types
)
10115 const struct dwp_hash_table
*dwp_htab
=
10116 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10117 bfd
*dbfd
= dwp_file
->dbfd
;
10118 uint32_t mask
= dwp_htab
->nr_slots
- 1;
10119 uint32_t hash
= signature
& mask
;
10120 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
10123 struct dwo_unit find_dwo_cu
, *dwo_cu
;
10125 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
10126 find_dwo_cu
.signature
= signature
;
10127 slot
= htab_find_slot (is_debug_types
10128 ? dwp_file
->loaded_tus
10129 : dwp_file
->loaded_cus
,
10130 &find_dwo_cu
, INSERT
);
10135 /* Use a for loop so that we don't loop forever on bad debug info. */
10136 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
10138 ULONGEST signature_in_table
;
10140 signature_in_table
=
10141 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
10142 if (signature_in_table
== signature
)
10144 uint32_t unit_index
=
10145 read_4_bytes (dbfd
,
10146 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
10148 if (dwp_file
->version
== 1)
10150 *slot
= create_dwo_unit_in_dwp_v1 (dwp_file
, unit_index
,
10151 comp_dir
, signature
,
10156 *slot
= create_dwo_unit_in_dwp_v2 (dwp_file
, unit_index
,
10157 comp_dir
, signature
,
10162 if (signature_in_table
== 0)
10164 hash
= (hash
+ hash2
) & mask
;
10167 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
10168 " [in module %s]"),
10172 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
10173 Open the file specified by FILE_NAME and hand it off to BFD for
10174 preliminary analysis. Return a newly initialized bfd *, which
10175 includes a canonicalized copy of FILE_NAME.
10176 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
10177 SEARCH_CWD is true if the current directory is to be searched.
10178 It will be searched before debug-file-directory.
10179 If successful, the file is added to the bfd include table of the
10180 objfile's bfd (see gdb_bfd_record_inclusion).
10181 If unable to find/open the file, return NULL.
10182 NOTE: This function is derived from symfile_bfd_open. */
10185 try_open_dwop_file (const char *file_name
, int is_dwp
, int search_cwd
)
10189 char *absolute_name
;
10190 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
10191 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
10192 to debug_file_directory. */
10194 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
10198 if (*debug_file_directory
!= '\0')
10199 search_path
= concat (".", dirname_separator_string
,
10200 debug_file_directory
, NULL
);
10202 search_path
= xstrdup (".");
10205 search_path
= xstrdup (debug_file_directory
);
10207 flags
= OPF_RETURN_REALPATH
;
10209 flags
|= OPF_SEARCH_IN_PATH
;
10210 desc
= openp (search_path
, flags
, file_name
,
10211 O_RDONLY
| O_BINARY
, &absolute_name
);
10212 xfree (search_path
);
10216 sym_bfd
= gdb_bfd_open (absolute_name
, gnutarget
, desc
);
10217 xfree (absolute_name
);
10218 if (sym_bfd
== NULL
)
10220 bfd_set_cacheable (sym_bfd
, 1);
10222 if (!bfd_check_format (sym_bfd
, bfd_object
))
10224 gdb_bfd_unref (sym_bfd
); /* This also closes desc. */
10228 /* Success. Record the bfd as having been included by the objfile's bfd.
10229 This is important because things like demangled_names_hash lives in the
10230 objfile's per_bfd space and may have references to things like symbol
10231 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
10232 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
);
10237 /* Try to open DWO file FILE_NAME.
10238 COMP_DIR is the DW_AT_comp_dir attribute.
10239 The result is the bfd handle of the file.
10240 If there is a problem finding or opening the file, return NULL.
10241 Upon success, the canonicalized path of the file is stored in the bfd,
10242 same as symfile_bfd_open. */
10245 open_dwo_file (const char *file_name
, const char *comp_dir
)
10249 if (IS_ABSOLUTE_PATH (file_name
))
10250 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 0 /*search_cwd*/);
10252 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
10254 if (comp_dir
!= NULL
)
10256 char *path_to_try
= concat (comp_dir
, SLASH_STRING
, file_name
, NULL
);
10258 /* NOTE: If comp_dir is a relative path, this will also try the
10259 search path, which seems useful. */
10260 abfd
= try_open_dwop_file (path_to_try
, 0 /*is_dwp*/, 1 /*search_cwd*/);
10261 xfree (path_to_try
);
10266 /* That didn't work, try debug-file-directory, which, despite its name,
10267 is a list of paths. */
10269 if (*debug_file_directory
== '\0')
10272 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 1 /*search_cwd*/);
10275 /* This function is mapped across the sections and remembers the offset and
10276 size of each of the DWO debugging sections we are interested in. */
10279 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
10281 struct dwo_sections
*dwo_sections
= dwo_sections_ptr
;
10282 const struct dwop_section_names
*names
= &dwop_section_names
;
10284 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10286 dwo_sections
->abbrev
.s
.asection
= sectp
;
10287 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
10289 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
10291 dwo_sections
->info
.s
.asection
= sectp
;
10292 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
10294 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10296 dwo_sections
->line
.s
.asection
= sectp
;
10297 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
10299 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10301 dwo_sections
->loc
.s
.asection
= sectp
;
10302 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
10304 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10306 dwo_sections
->macinfo
.s
.asection
= sectp
;
10307 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
10309 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10311 dwo_sections
->macro
.s
.asection
= sectp
;
10312 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
10314 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
10316 dwo_sections
->str
.s
.asection
= sectp
;
10317 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
10319 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10321 dwo_sections
->str_offsets
.s
.asection
= sectp
;
10322 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
10324 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
10326 struct dwarf2_section_info type_section
;
10328 memset (&type_section
, 0, sizeof (type_section
));
10329 type_section
.s
.asection
= sectp
;
10330 type_section
.size
= bfd_get_section_size (sectp
);
10331 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
10336 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
10337 by PER_CU. This is for the non-DWP case.
10338 The result is NULL if DWO_NAME can't be found. */
10340 static struct dwo_file
*
10341 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
10342 const char *dwo_name
, const char *comp_dir
)
10344 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10345 struct dwo_file
*dwo_file
;
10347 struct cleanup
*cleanups
;
10349 dbfd
= open_dwo_file (dwo_name
, comp_dir
);
10352 if (dwarf2_read_debug
)
10353 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
10356 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10357 dwo_file
->dwo_name
= dwo_name
;
10358 dwo_file
->comp_dir
= comp_dir
;
10359 dwo_file
->dbfd
= dbfd
;
10361 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwo_file
);
10363 bfd_map_over_sections (dbfd
, dwarf2_locate_dwo_sections
, &dwo_file
->sections
);
10365 dwo_file
->cu
= create_dwo_cu (dwo_file
);
10367 dwo_file
->tus
= create_debug_types_hash_table (dwo_file
,
10368 dwo_file
->sections
.types
);
10370 discard_cleanups (cleanups
);
10372 if (dwarf2_read_debug
)
10373 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
10378 /* This function is mapped across the sections and remembers the offset and
10379 size of each of the DWP debugging sections common to version 1 and 2 that
10380 we are interested in. */
10383 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
10384 void *dwp_file_ptr
)
10386 struct dwp_file
*dwp_file
= dwp_file_ptr
;
10387 const struct dwop_section_names
*names
= &dwop_section_names
;
10388 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
10390 /* Record the ELF section number for later lookup: this is what the
10391 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10392 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
10393 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
10395 /* Look for specific sections that we need. */
10396 if (section_is_p (sectp
->name
, &names
->str_dwo
))
10398 dwp_file
->sections
.str
.s
.asection
= sectp
;
10399 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
10401 else if (section_is_p (sectp
->name
, &names
->cu_index
))
10403 dwp_file
->sections
.cu_index
.s
.asection
= sectp
;
10404 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
10406 else if (section_is_p (sectp
->name
, &names
->tu_index
))
10408 dwp_file
->sections
.tu_index
.s
.asection
= sectp
;
10409 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
10413 /* This function is mapped across the sections and remembers the offset and
10414 size of each of the DWP version 2 debugging sections that we are interested
10415 in. This is split into a separate function because we don't know if we
10416 have version 1 or 2 until we parse the cu_index/tu_index sections. */
10419 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
10421 struct dwp_file
*dwp_file
= dwp_file_ptr
;
10422 const struct dwop_section_names
*names
= &dwop_section_names
;
10423 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
10425 /* Record the ELF section number for later lookup: this is what the
10426 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10427 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
10428 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
10430 /* Look for specific sections that we need. */
10431 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10433 dwp_file
->sections
.abbrev
.s
.asection
= sectp
;
10434 dwp_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
10436 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
10438 dwp_file
->sections
.info
.s
.asection
= sectp
;
10439 dwp_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
10441 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10443 dwp_file
->sections
.line
.s
.asection
= sectp
;
10444 dwp_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
10446 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10448 dwp_file
->sections
.loc
.s
.asection
= sectp
;
10449 dwp_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
10451 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10453 dwp_file
->sections
.macinfo
.s
.asection
= sectp
;
10454 dwp_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
10456 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10458 dwp_file
->sections
.macro
.s
.asection
= sectp
;
10459 dwp_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
10461 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10463 dwp_file
->sections
.str_offsets
.s
.asection
= sectp
;
10464 dwp_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
10466 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
10468 dwp_file
->sections
.types
.s
.asection
= sectp
;
10469 dwp_file
->sections
.types
.size
= bfd_get_section_size (sectp
);
10473 /* Hash function for dwp_file loaded CUs/TUs. */
10476 hash_dwp_loaded_cutus (const void *item
)
10478 const struct dwo_unit
*dwo_unit
= item
;
10480 /* This drops the top 32 bits of the signature, but is ok for a hash. */
10481 return dwo_unit
->signature
;
10484 /* Equality function for dwp_file loaded CUs/TUs. */
10487 eq_dwp_loaded_cutus (const void *a
, const void *b
)
10489 const struct dwo_unit
*dua
= a
;
10490 const struct dwo_unit
*dub
= b
;
10492 return dua
->signature
== dub
->signature
;
10495 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
10498 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
10500 return htab_create_alloc_ex (3,
10501 hash_dwp_loaded_cutus
,
10502 eq_dwp_loaded_cutus
,
10504 &objfile
->objfile_obstack
,
10505 hashtab_obstack_allocate
,
10506 dummy_obstack_deallocate
);
10509 /* Try to open DWP file FILE_NAME.
10510 The result is the bfd handle of the file.
10511 If there is a problem finding or opening the file, return NULL.
10512 Upon success, the canonicalized path of the file is stored in the bfd,
10513 same as symfile_bfd_open. */
10516 open_dwp_file (const char *file_name
)
10520 abfd
= try_open_dwop_file (file_name
, 1 /*is_dwp*/, 1 /*search_cwd*/);
10524 /* Work around upstream bug 15652.
10525 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
10526 [Whether that's a "bug" is debatable, but it is getting in our way.]
10527 We have no real idea where the dwp file is, because gdb's realpath-ing
10528 of the executable's path may have discarded the needed info.
10529 [IWBN if the dwp file name was recorded in the executable, akin to
10530 .gnu_debuglink, but that doesn't exist yet.]
10531 Strip the directory from FILE_NAME and search again. */
10532 if (*debug_file_directory
!= '\0')
10534 /* Don't implicitly search the current directory here.
10535 If the user wants to search "." to handle this case,
10536 it must be added to debug-file-directory. */
10537 return try_open_dwop_file (lbasename (file_name
), 1 /*is_dwp*/,
10544 /* Initialize the use of the DWP file for the current objfile.
10545 By convention the name of the DWP file is ${objfile}.dwp.
10546 The result is NULL if it can't be found. */
10548 static struct dwp_file
*
10549 open_and_init_dwp_file (void)
10551 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10552 struct dwp_file
*dwp_file
;
10555 struct cleanup
*cleanups
;
10557 /* Try to find first .dwp for the binary file before any symbolic links
10559 dwp_name
= xstrprintf ("%s.dwp", objfile
->original_name
);
10560 cleanups
= make_cleanup (xfree
, dwp_name
);
10562 dbfd
= open_dwp_file (dwp_name
);
10564 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
10566 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
10567 dwp_name
= xstrprintf ("%s.dwp", objfile_name (objfile
));
10568 make_cleanup (xfree
, dwp_name
);
10569 dbfd
= open_dwp_file (dwp_name
);
10574 if (dwarf2_read_debug
)
10575 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
);
10576 do_cleanups (cleanups
);
10579 dwp_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_file
);
10580 dwp_file
->name
= bfd_get_filename (dbfd
);
10581 dwp_file
->dbfd
= dbfd
;
10582 do_cleanups (cleanups
);
10584 /* +1: section 0 is unused */
10585 dwp_file
->num_sections
= bfd_count_sections (dbfd
) + 1;
10586 dwp_file
->elf_sections
=
10587 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
10588 dwp_file
->num_sections
, asection
*);
10590 bfd_map_over_sections (dbfd
, dwarf2_locate_common_dwp_sections
, dwp_file
);
10592 dwp_file
->cus
= create_dwp_hash_table (dwp_file
, 0);
10594 dwp_file
->tus
= create_dwp_hash_table (dwp_file
, 1);
10596 /* The DWP file version is stored in the hash table. Oh well. */
10597 if (dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
10599 /* Technically speaking, we should try to limp along, but this is
10600 pretty bizarre. We use pulongest here because that's the established
10601 portability solution (e.g, we cannot use %u for uint32_t). */
10602 error (_("Dwarf Error: DWP file CU version %s doesn't match"
10603 " TU version %s [in DWP file %s]"),
10604 pulongest (dwp_file
->cus
->version
),
10605 pulongest (dwp_file
->tus
->version
), dwp_name
);
10607 dwp_file
->version
= dwp_file
->cus
->version
;
10609 if (dwp_file
->version
== 2)
10610 bfd_map_over_sections (dbfd
, dwarf2_locate_v2_dwp_sections
, dwp_file
);
10612 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
10613 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
10615 if (dwarf2_read_debug
)
10617 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
10618 fprintf_unfiltered (gdb_stdlog
,
10619 " %s CUs, %s TUs\n",
10620 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
10621 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
10627 /* Wrapper around open_and_init_dwp_file, only open it once. */
10629 static struct dwp_file
*
10630 get_dwp_file (void)
10632 if (! dwarf2_per_objfile
->dwp_checked
)
10634 dwarf2_per_objfile
->dwp_file
= open_and_init_dwp_file ();
10635 dwarf2_per_objfile
->dwp_checked
= 1;
10637 return dwarf2_per_objfile
->dwp_file
;
10640 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
10641 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
10642 or in the DWP file for the objfile, referenced by THIS_UNIT.
10643 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
10644 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
10646 This is called, for example, when wanting to read a variable with a
10647 complex location. Therefore we don't want to do file i/o for every call.
10648 Therefore we don't want to look for a DWO file on every call.
10649 Therefore we first see if we've already seen SIGNATURE in a DWP file,
10650 then we check if we've already seen DWO_NAME, and only THEN do we check
10653 The result is a pointer to the dwo_unit object or NULL if we didn't find it
10654 (dwo_id mismatch or couldn't find the DWO/DWP file). */
10656 static struct dwo_unit
*
10657 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
10658 const char *dwo_name
, const char *comp_dir
,
10659 ULONGEST signature
, int is_debug_types
)
10661 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10662 const char *kind
= is_debug_types
? "TU" : "CU";
10663 void **dwo_file_slot
;
10664 struct dwo_file
*dwo_file
;
10665 struct dwp_file
*dwp_file
;
10667 /* First see if there's a DWP file.
10668 If we have a DWP file but didn't find the DWO inside it, don't
10669 look for the original DWO file. It makes gdb behave differently
10670 depending on whether one is debugging in the build tree. */
10672 dwp_file
= get_dwp_file ();
10673 if (dwp_file
!= NULL
)
10675 const struct dwp_hash_table
*dwp_htab
=
10676 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10678 if (dwp_htab
!= NULL
)
10680 struct dwo_unit
*dwo_cutu
=
10681 lookup_dwo_unit_in_dwp (dwp_file
, comp_dir
,
10682 signature
, is_debug_types
);
10684 if (dwo_cutu
!= NULL
)
10686 if (dwarf2_read_debug
)
10688 fprintf_unfiltered (gdb_stdlog
,
10689 "Virtual DWO %s %s found: @%s\n",
10690 kind
, hex_string (signature
),
10691 host_address_to_string (dwo_cutu
));
10699 /* No DWP file, look for the DWO file. */
10701 dwo_file_slot
= lookup_dwo_file_slot (dwo_name
, comp_dir
);
10702 if (*dwo_file_slot
== NULL
)
10704 /* Read in the file and build a table of the CUs/TUs it contains. */
10705 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
10707 /* NOTE: This will be NULL if unable to open the file. */
10708 dwo_file
= *dwo_file_slot
;
10710 if (dwo_file
!= NULL
)
10712 struct dwo_unit
*dwo_cutu
= NULL
;
10714 if (is_debug_types
&& dwo_file
->tus
)
10716 struct dwo_unit find_dwo_cutu
;
10718 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
10719 find_dwo_cutu
.signature
= signature
;
10720 dwo_cutu
= htab_find (dwo_file
->tus
, &find_dwo_cutu
);
10722 else if (!is_debug_types
&& dwo_file
->cu
)
10724 if (signature
== dwo_file
->cu
->signature
)
10725 dwo_cutu
= dwo_file
->cu
;
10728 if (dwo_cutu
!= NULL
)
10730 if (dwarf2_read_debug
)
10732 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
10733 kind
, dwo_name
, hex_string (signature
),
10734 host_address_to_string (dwo_cutu
));
10741 /* We didn't find it. This could mean a dwo_id mismatch, or
10742 someone deleted the DWO/DWP file, or the search path isn't set up
10743 correctly to find the file. */
10745 if (dwarf2_read_debug
)
10747 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
10748 kind
, dwo_name
, hex_string (signature
));
10751 /* This is a warning and not a complaint because it can be caused by
10752 pilot error (e.g., user accidentally deleting the DWO). */
10754 /* Print the name of the DWP file if we looked there, helps the user
10755 better diagnose the problem. */
10756 char *dwp_text
= NULL
;
10757 struct cleanup
*cleanups
;
10759 if (dwp_file
!= NULL
)
10760 dwp_text
= xstrprintf (" [in DWP file %s]", lbasename (dwp_file
->name
));
10761 cleanups
= make_cleanup (xfree
, dwp_text
);
10763 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x"
10764 " [in module %s]"),
10765 kind
, dwo_name
, hex_string (signature
),
10766 dwp_text
!= NULL
? dwp_text
: "",
10767 this_unit
->is_debug_types
? "TU" : "CU",
10768 this_unit
->offset
.sect_off
, objfile_name (objfile
));
10770 do_cleanups (cleanups
);
10775 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
10776 See lookup_dwo_cutu_unit for details. */
10778 static struct dwo_unit
*
10779 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
10780 const char *dwo_name
, const char *comp_dir
,
10781 ULONGEST signature
)
10783 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
10786 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
10787 See lookup_dwo_cutu_unit for details. */
10789 static struct dwo_unit
*
10790 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
10791 const char *dwo_name
, const char *comp_dir
)
10793 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
10796 /* Traversal function for queue_and_load_all_dwo_tus. */
10799 queue_and_load_dwo_tu (void **slot
, void *info
)
10801 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
10802 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
10803 ULONGEST signature
= dwo_unit
->signature
;
10804 struct signatured_type
*sig_type
=
10805 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
10807 if (sig_type
!= NULL
)
10809 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
10811 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
10812 a real dependency of PER_CU on SIG_TYPE. That is detected later
10813 while processing PER_CU. */
10814 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
10815 load_full_type_unit (sig_cu
);
10816 VEC_safe_push (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, sig_cu
);
10822 /* Queue all TUs contained in the DWO of PER_CU to be read in.
10823 The DWO may have the only definition of the type, though it may not be
10824 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
10825 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
10828 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
10830 struct dwo_unit
*dwo_unit
;
10831 struct dwo_file
*dwo_file
;
10833 gdb_assert (!per_cu
->is_debug_types
);
10834 gdb_assert (get_dwp_file () == NULL
);
10835 gdb_assert (per_cu
->cu
!= NULL
);
10837 dwo_unit
= per_cu
->cu
->dwo_unit
;
10838 gdb_assert (dwo_unit
!= NULL
);
10840 dwo_file
= dwo_unit
->dwo_file
;
10841 if (dwo_file
->tus
!= NULL
)
10842 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
10845 /* Free all resources associated with DWO_FILE.
10846 Close the DWO file and munmap the sections.
10847 All memory should be on the objfile obstack. */
10850 free_dwo_file (struct dwo_file
*dwo_file
, struct objfile
*objfile
)
10853 struct dwarf2_section_info
*section
;
10855 /* Note: dbfd is NULL for virtual DWO files. */
10856 gdb_bfd_unref (dwo_file
->dbfd
);
10858 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
10861 /* Wrapper for free_dwo_file for use in cleanups. */
10864 free_dwo_file_cleanup (void *arg
)
10866 struct dwo_file
*dwo_file
= (struct dwo_file
*) arg
;
10867 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10869 free_dwo_file (dwo_file
, objfile
);
10872 /* Traversal function for free_dwo_files. */
10875 free_dwo_file_from_slot (void **slot
, void *info
)
10877 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
10878 struct objfile
*objfile
= (struct objfile
*) info
;
10880 free_dwo_file (dwo_file
, objfile
);
10885 /* Free all resources associated with DWO_FILES. */
10888 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
10890 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
10893 /* Read in various DIEs. */
10895 /* qsort helper for inherit_abstract_dies. */
10898 unsigned_int_compar (const void *ap
, const void *bp
)
10900 unsigned int a
= *(unsigned int *) ap
;
10901 unsigned int b
= *(unsigned int *) bp
;
10903 return (a
> b
) - (b
> a
);
10906 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
10907 Inherit only the children of the DW_AT_abstract_origin DIE not being
10908 already referenced by DW_AT_abstract_origin from the children of the
10912 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
10914 struct die_info
*child_die
;
10915 unsigned die_children_count
;
10916 /* CU offsets which were referenced by children of the current DIE. */
10917 sect_offset
*offsets
;
10918 sect_offset
*offsets_end
, *offsetp
;
10919 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
10920 struct die_info
*origin_die
;
10921 /* Iterator of the ORIGIN_DIE children. */
10922 struct die_info
*origin_child_die
;
10923 struct cleanup
*cleanups
;
10924 struct attribute
*attr
;
10925 struct dwarf2_cu
*origin_cu
;
10926 struct pending
**origin_previous_list_in_scope
;
10928 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
10932 /* Note that following die references may follow to a die in a
10936 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
10938 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
10940 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
10941 origin_cu
->list_in_scope
= cu
->list_in_scope
;
10943 if (die
->tag
!= origin_die
->tag
10944 && !(die
->tag
== DW_TAG_inlined_subroutine
10945 && origin_die
->tag
== DW_TAG_subprogram
))
10946 complaint (&symfile_complaints
,
10947 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
10948 die
->offset
.sect_off
, origin_die
->offset
.sect_off
);
10950 child_die
= die
->child
;
10951 die_children_count
= 0;
10952 while (child_die
&& child_die
->tag
)
10954 child_die
= sibling_die (child_die
);
10955 die_children_count
++;
10957 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
10958 cleanups
= make_cleanup (xfree
, offsets
);
10960 offsets_end
= offsets
;
10961 child_die
= die
->child
;
10962 while (child_die
&& child_die
->tag
)
10964 /* For each CHILD_DIE, find the corresponding child of
10965 ORIGIN_DIE. If there is more than one layer of
10966 DW_AT_abstract_origin, follow them all; there shouldn't be,
10967 but GCC versions at least through 4.4 generate this (GCC PR
10969 struct die_info
*child_origin_die
= child_die
;
10970 struct dwarf2_cu
*child_origin_cu
= cu
;
10974 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
10978 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
10982 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
10983 counterpart may exist. */
10984 if (child_origin_die
!= child_die
)
10986 if (child_die
->tag
!= child_origin_die
->tag
10987 && !(child_die
->tag
== DW_TAG_inlined_subroutine
10988 && child_origin_die
->tag
== DW_TAG_subprogram
))
10989 complaint (&symfile_complaints
,
10990 _("Child DIE 0x%x and its abstract origin 0x%x have "
10991 "different tags"), child_die
->offset
.sect_off
,
10992 child_origin_die
->offset
.sect_off
);
10993 if (child_origin_die
->parent
!= origin_die
)
10994 complaint (&symfile_complaints
,
10995 _("Child DIE 0x%x and its abstract origin 0x%x have "
10996 "different parents"), child_die
->offset
.sect_off
,
10997 child_origin_die
->offset
.sect_off
);
10999 *offsets_end
++ = child_origin_die
->offset
;
11001 child_die
= sibling_die (child_die
);
11003 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
11004 unsigned_int_compar
);
11005 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
11006 if (offsetp
[-1].sect_off
== offsetp
->sect_off
)
11007 complaint (&symfile_complaints
,
11008 _("Multiple children of DIE 0x%x refer "
11009 "to DIE 0x%x as their abstract origin"),
11010 die
->offset
.sect_off
, offsetp
->sect_off
);
11013 origin_child_die
= origin_die
->child
;
11014 while (origin_child_die
&& origin_child_die
->tag
)
11016 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
11017 while (offsetp
< offsets_end
11018 && offsetp
->sect_off
< origin_child_die
->offset
.sect_off
)
11020 if (offsetp
>= offsets_end
11021 || offsetp
->sect_off
> origin_child_die
->offset
.sect_off
)
11023 /* Found that ORIGIN_CHILD_DIE is really not referenced.
11024 Check whether we're already processing ORIGIN_CHILD_DIE.
11025 This can happen with mutually referenced abstract_origins.
11027 if (!origin_child_die
->in_process
)
11028 process_die (origin_child_die
, origin_cu
);
11030 origin_child_die
= sibling_die (origin_child_die
);
11032 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
11034 do_cleanups (cleanups
);
11038 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11040 struct objfile
*objfile
= cu
->objfile
;
11041 struct context_stack
*new;
11044 struct die_info
*child_die
;
11045 struct attribute
*attr
, *call_line
, *call_file
;
11047 CORE_ADDR baseaddr
;
11048 struct block
*block
;
11049 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
11050 VEC (symbolp
) *template_args
= NULL
;
11051 struct template_symbol
*templ_func
= NULL
;
11055 /* If we do not have call site information, we can't show the
11056 caller of this inlined function. That's too confusing, so
11057 only use the scope for local variables. */
11058 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
11059 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
11060 if (call_line
== NULL
|| call_file
== NULL
)
11062 read_lexical_block_scope (die
, cu
);
11067 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11069 name
= dwarf2_name (die
, cu
);
11071 /* Ignore functions with missing or empty names. These are actually
11072 illegal according to the DWARF standard. */
11075 complaint (&symfile_complaints
,
11076 _("missing name for subprogram DIE at %d"),
11077 die
->offset
.sect_off
);
11081 /* Ignore functions with missing or invalid low and high pc attributes. */
11082 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
11084 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
11085 if (!attr
|| !DW_UNSND (attr
))
11086 complaint (&symfile_complaints
,
11087 _("cannot get low and high bounds "
11088 "for subprogram DIE at %d"),
11089 die
->offset
.sect_off
);
11094 highpc
+= baseaddr
;
11096 /* If we have any template arguments, then we must allocate a
11097 different sort of symbol. */
11098 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
11100 if (child_die
->tag
== DW_TAG_template_type_param
11101 || child_die
->tag
== DW_TAG_template_value_param
)
11103 templ_func
= allocate_template_symbol (objfile
);
11104 templ_func
->base
.is_cplus_template_function
= 1;
11109 new = push_context (0, lowpc
);
11110 new->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
11111 (struct symbol
*) templ_func
);
11113 /* If there is a location expression for DW_AT_frame_base, record
11115 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
11117 dwarf2_symbol_mark_computed (attr
, new->name
, cu
, 1);
11119 cu
->list_in_scope
= &local_symbols
;
11121 if (die
->child
!= NULL
)
11123 child_die
= die
->child
;
11124 while (child_die
&& child_die
->tag
)
11126 if (child_die
->tag
== DW_TAG_template_type_param
11127 || child_die
->tag
== DW_TAG_template_value_param
)
11129 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
11132 VEC_safe_push (symbolp
, template_args
, arg
);
11135 process_die (child_die
, cu
);
11136 child_die
= sibling_die (child_die
);
11140 inherit_abstract_dies (die
, cu
);
11142 /* If we have a DW_AT_specification, we might need to import using
11143 directives from the context of the specification DIE. See the
11144 comment in determine_prefix. */
11145 if (cu
->language
== language_cplus
11146 && dwarf2_attr (die
, DW_AT_specification
, cu
))
11148 struct dwarf2_cu
*spec_cu
= cu
;
11149 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
11153 child_die
= spec_die
->child
;
11154 while (child_die
&& child_die
->tag
)
11156 if (child_die
->tag
== DW_TAG_imported_module
)
11157 process_die (child_die
, spec_cu
);
11158 child_die
= sibling_die (child_die
);
11161 /* In some cases, GCC generates specification DIEs that
11162 themselves contain DW_AT_specification attributes. */
11163 spec_die
= die_specification (spec_die
, &spec_cu
);
11167 new = pop_context ();
11168 /* Make a block for the local symbols within. */
11169 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
11170 lowpc
, highpc
, objfile
);
11172 /* For C++, set the block's scope. */
11173 if ((cu
->language
== language_cplus
|| cu
->language
== language_fortran
)
11174 && cu
->processing_has_namespace_info
)
11175 block_set_scope (block
, determine_prefix (die
, cu
),
11176 &objfile
->objfile_obstack
);
11178 /* If we have address ranges, record them. */
11179 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11181 /* Attach template arguments to function. */
11182 if (! VEC_empty (symbolp
, template_args
))
11184 gdb_assert (templ_func
!= NULL
);
11186 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
11187 templ_func
->template_arguments
11188 = obstack_alloc (&objfile
->objfile_obstack
,
11189 (templ_func
->n_template_arguments
11190 * sizeof (struct symbol
*)));
11191 memcpy (templ_func
->template_arguments
,
11192 VEC_address (symbolp
, template_args
),
11193 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
11194 VEC_free (symbolp
, template_args
);
11197 /* In C++, we can have functions nested inside functions (e.g., when
11198 a function declares a class that has methods). This means that
11199 when we finish processing a function scope, we may need to go
11200 back to building a containing block's symbol lists. */
11201 local_symbols
= new->locals
;
11202 using_directives
= new->using_directives
;
11204 /* If we've finished processing a top-level function, subsequent
11205 symbols go in the file symbol list. */
11206 if (outermost_context_p ())
11207 cu
->list_in_scope
= &file_symbols
;
11210 /* Process all the DIES contained within a lexical block scope. Start
11211 a new scope, process the dies, and then close the scope. */
11214 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11216 struct objfile
*objfile
= cu
->objfile
;
11217 struct context_stack
*new;
11218 CORE_ADDR lowpc
, highpc
;
11219 struct die_info
*child_die
;
11220 CORE_ADDR baseaddr
;
11222 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11224 /* Ignore blocks with missing or invalid low and high pc attributes. */
11225 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
11226 as multiple lexical blocks? Handling children in a sane way would
11227 be nasty. Might be easier to properly extend generic blocks to
11228 describe ranges. */
11229 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
11232 highpc
+= baseaddr
;
11234 push_context (0, lowpc
);
11235 if (die
->child
!= NULL
)
11237 child_die
= die
->child
;
11238 while (child_die
&& child_die
->tag
)
11240 process_die (child_die
, cu
);
11241 child_die
= sibling_die (child_die
);
11244 new = pop_context ();
11246 if (local_symbols
!= NULL
|| using_directives
!= NULL
)
11248 struct block
*block
11249 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
11252 /* Note that recording ranges after traversing children, as we
11253 do here, means that recording a parent's ranges entails
11254 walking across all its children's ranges as they appear in
11255 the address map, which is quadratic behavior.
11257 It would be nicer to record the parent's ranges before
11258 traversing its children, simply overriding whatever you find
11259 there. But since we don't even decide whether to create a
11260 block until after we've traversed its children, that's hard
11262 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11264 local_symbols
= new->locals
;
11265 using_directives
= new->using_directives
;
11268 /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */
11271 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11273 struct objfile
*objfile
= cu
->objfile
;
11274 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11275 CORE_ADDR pc
, baseaddr
;
11276 struct attribute
*attr
;
11277 struct call_site
*call_site
, call_site_local
;
11280 struct die_info
*child_die
;
11282 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11284 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
11287 complaint (&symfile_complaints
,
11288 _("missing DW_AT_low_pc for DW_TAG_GNU_call_site "
11289 "DIE 0x%x [in module %s]"),
11290 die
->offset
.sect_off
, objfile_name (objfile
));
11293 pc
= attr_value_as_address (attr
) + baseaddr
;
11295 if (cu
->call_site_htab
== NULL
)
11296 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
11297 NULL
, &objfile
->objfile_obstack
,
11298 hashtab_obstack_allocate
, NULL
);
11299 call_site_local
.pc
= pc
;
11300 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
11303 complaint (&symfile_complaints
,
11304 _("Duplicate PC %s for DW_TAG_GNU_call_site "
11305 "DIE 0x%x [in module %s]"),
11306 paddress (gdbarch
, pc
), die
->offset
.sect_off
,
11307 objfile_name (objfile
));
11311 /* Count parameters at the caller. */
11314 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
11315 child_die
= sibling_die (child_die
))
11317 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11319 complaint (&symfile_complaints
,
11320 _("Tag %d is not DW_TAG_GNU_call_site_parameter in "
11321 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11322 child_die
->tag
, child_die
->offset
.sect_off
,
11323 objfile_name (objfile
));
11330 call_site
= obstack_alloc (&objfile
->objfile_obstack
,
11331 (sizeof (*call_site
)
11332 + (sizeof (*call_site
->parameter
)
11333 * (nparams
- 1))));
11335 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
11336 call_site
->pc
= pc
;
11338 if (dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
11340 struct die_info
*func_die
;
11342 /* Skip also over DW_TAG_inlined_subroutine. */
11343 for (func_die
= die
->parent
;
11344 func_die
&& func_die
->tag
!= DW_TAG_subprogram
11345 && func_die
->tag
!= DW_TAG_subroutine_type
;
11346 func_die
= func_die
->parent
);
11348 /* DW_AT_GNU_all_call_sites is a superset
11349 of DW_AT_GNU_all_tail_call_sites. */
11351 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
11352 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
11354 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
11355 not complete. But keep CALL_SITE for look ups via call_site_htab,
11356 both the initial caller containing the real return address PC and
11357 the final callee containing the current PC of a chain of tail
11358 calls do not need to have the tail call list complete. But any
11359 function candidate for a virtual tail call frame searched via
11360 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
11361 determined unambiguously. */
11365 struct type
*func_type
= NULL
;
11368 func_type
= get_die_type (func_die
, cu
);
11369 if (func_type
!= NULL
)
11371 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
11373 /* Enlist this call site to the function. */
11374 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
11375 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
11378 complaint (&symfile_complaints
,
11379 _("Cannot find function owning DW_TAG_GNU_call_site "
11380 "DIE 0x%x [in module %s]"),
11381 die
->offset
.sect_off
, objfile_name (objfile
));
11385 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
11387 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
11388 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
11389 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
11390 /* Keep NULL DWARF_BLOCK. */;
11391 else if (attr_form_is_block (attr
))
11393 struct dwarf2_locexpr_baton
*dlbaton
;
11395 dlbaton
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*dlbaton
));
11396 dlbaton
->data
= DW_BLOCK (attr
)->data
;
11397 dlbaton
->size
= DW_BLOCK (attr
)->size
;
11398 dlbaton
->per_cu
= cu
->per_cu
;
11400 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
11402 else if (attr_form_is_ref (attr
))
11404 struct dwarf2_cu
*target_cu
= cu
;
11405 struct die_info
*target_die
;
11407 target_die
= follow_die_ref (die
, attr
, &target_cu
);
11408 gdb_assert (target_cu
->objfile
== objfile
);
11409 if (die_is_declaration (target_die
, target_cu
))
11411 const char *target_physname
= NULL
;
11412 struct attribute
*target_attr
;
11414 /* Prefer the mangled name; otherwise compute the demangled one. */
11415 target_attr
= dwarf2_attr (target_die
, DW_AT_linkage_name
, target_cu
);
11416 if (target_attr
== NULL
)
11417 target_attr
= dwarf2_attr (target_die
, DW_AT_MIPS_linkage_name
,
11419 if (target_attr
!= NULL
&& DW_STRING (target_attr
) != NULL
)
11420 target_physname
= DW_STRING (target_attr
);
11422 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
11423 if (target_physname
== NULL
)
11424 complaint (&symfile_complaints
,
11425 _("DW_AT_GNU_call_site_target target DIE has invalid "
11426 "physname, for referencing DIE 0x%x [in module %s]"),
11427 die
->offset
.sect_off
, objfile_name (objfile
));
11429 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
11435 /* DW_AT_entry_pc should be preferred. */
11436 if (!dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
))
11437 complaint (&symfile_complaints
,
11438 _("DW_AT_GNU_call_site_target target DIE has invalid "
11439 "low pc, for referencing DIE 0x%x [in module %s]"),
11440 die
->offset
.sect_off
, objfile_name (objfile
));
11442 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
+ baseaddr
);
11446 complaint (&symfile_complaints
,
11447 _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither "
11448 "block nor reference, for DIE 0x%x [in module %s]"),
11449 die
->offset
.sect_off
, objfile_name (objfile
));
11451 call_site
->per_cu
= cu
->per_cu
;
11453 for (child_die
= die
->child
;
11454 child_die
&& child_die
->tag
;
11455 child_die
= sibling_die (child_die
))
11457 struct call_site_parameter
*parameter
;
11458 struct attribute
*loc
, *origin
;
11460 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11462 /* Already printed the complaint above. */
11466 gdb_assert (call_site
->parameter_count
< nparams
);
11467 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
11469 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
11470 specifies DW_TAG_formal_parameter. Value of the data assumed for the
11471 register is contained in DW_AT_GNU_call_site_value. */
11473 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
11474 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
11475 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
11477 sect_offset offset
;
11479 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
11480 offset
= dwarf2_get_ref_die_offset (origin
);
11481 if (!offset_in_cu_p (&cu
->header
, offset
))
11483 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
11484 binding can be done only inside one CU. Such referenced DIE
11485 therefore cannot be even moved to DW_TAG_partial_unit. */
11486 complaint (&symfile_complaints
,
11487 _("DW_AT_abstract_origin offset is not in CU for "
11488 "DW_TAG_GNU_call_site child DIE 0x%x "
11490 child_die
->offset
.sect_off
, objfile_name (objfile
));
11493 parameter
->u
.param_offset
.cu_off
= (offset
.sect_off
11494 - cu
->header
.offset
.sect_off
);
11496 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
11498 complaint (&symfile_complaints
,
11499 _("No DW_FORM_block* DW_AT_location for "
11500 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11501 child_die
->offset
.sect_off
, objfile_name (objfile
));
11506 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
11507 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
11508 if (parameter
->u
.dwarf_reg
!= -1)
11509 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
11510 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
11511 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
11512 ¶meter
->u
.fb_offset
))
11513 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
11516 complaint (&symfile_complaints
,
11517 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
11518 "for DW_FORM_block* DW_AT_location is supported for "
11519 "DW_TAG_GNU_call_site child DIE 0x%x "
11521 child_die
->offset
.sect_off
, objfile_name (objfile
));
11526 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
11527 if (!attr_form_is_block (attr
))
11529 complaint (&symfile_complaints
,
11530 _("No DW_FORM_block* DW_AT_GNU_call_site_value for "
11531 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11532 child_die
->offset
.sect_off
, objfile_name (objfile
));
11535 parameter
->value
= DW_BLOCK (attr
)->data
;
11536 parameter
->value_size
= DW_BLOCK (attr
)->size
;
11538 /* Parameters are not pre-cleared by memset above. */
11539 parameter
->data_value
= NULL
;
11540 parameter
->data_value_size
= 0;
11541 call_site
->parameter_count
++;
11543 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
11546 if (!attr_form_is_block (attr
))
11547 complaint (&symfile_complaints
,
11548 _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for "
11549 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11550 child_die
->offset
.sect_off
, objfile_name (objfile
));
11553 parameter
->data_value
= DW_BLOCK (attr
)->data
;
11554 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
11560 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
11561 Return 1 if the attributes are present and valid, otherwise, return 0.
11562 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
11565 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
11566 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
11567 struct partial_symtab
*ranges_pst
)
11569 struct objfile
*objfile
= cu
->objfile
;
11570 struct comp_unit_head
*cu_header
= &cu
->header
;
11571 bfd
*obfd
= objfile
->obfd
;
11572 unsigned int addr_size
= cu_header
->addr_size
;
11573 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
11574 /* Base address selection entry. */
11577 unsigned int dummy
;
11578 const gdb_byte
*buffer
;
11582 CORE_ADDR high
= 0;
11583 CORE_ADDR baseaddr
;
11585 found_base
= cu
->base_known
;
11586 base
= cu
->base_address
;
11588 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
11589 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
11591 complaint (&symfile_complaints
,
11592 _("Offset %d out of bounds for DW_AT_ranges attribute"),
11596 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
11598 /* Read in the largest possible address. */
11599 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
11600 if ((marker
& mask
) == mask
)
11602 /* If we found the largest possible address, then
11603 read the base address. */
11604 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
11605 buffer
+= 2 * addr_size
;
11606 offset
+= 2 * addr_size
;
11612 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11616 CORE_ADDR range_beginning
, range_end
;
11618 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
11619 buffer
+= addr_size
;
11620 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
11621 buffer
+= addr_size
;
11622 offset
+= 2 * addr_size
;
11624 /* An end of list marker is a pair of zero addresses. */
11625 if (range_beginning
== 0 && range_end
== 0)
11626 /* Found the end of list entry. */
11629 /* Each base address selection entry is a pair of 2 values.
11630 The first is the largest possible address, the second is
11631 the base address. Check for a base address here. */
11632 if ((range_beginning
& mask
) == mask
)
11634 /* If we found the largest possible address, then
11635 read the base address. */
11636 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
11643 /* We have no valid base address for the ranges
11645 complaint (&symfile_complaints
,
11646 _("Invalid .debug_ranges data (no base address)"));
11650 if (range_beginning
> range_end
)
11652 /* Inverted range entries are invalid. */
11653 complaint (&symfile_complaints
,
11654 _("Invalid .debug_ranges data (inverted range)"));
11658 /* Empty range entries have no effect. */
11659 if (range_beginning
== range_end
)
11662 range_beginning
+= base
;
11665 /* A not-uncommon case of bad debug info.
11666 Don't pollute the addrmap with bad data. */
11667 if (range_beginning
+ baseaddr
== 0
11668 && !dwarf2_per_objfile
->has_section_at_zero
)
11670 complaint (&symfile_complaints
,
11671 _(".debug_ranges entry has start address of zero"
11672 " [in module %s]"), objfile_name (objfile
));
11676 if (ranges_pst
!= NULL
)
11677 addrmap_set_empty (objfile
->psymtabs_addrmap
,
11678 range_beginning
+ baseaddr
,
11679 range_end
- 1 + baseaddr
,
11682 /* FIXME: This is recording everything as a low-high
11683 segment of consecutive addresses. We should have a
11684 data structure for discontiguous block ranges
11688 low
= range_beginning
;
11694 if (range_beginning
< low
)
11695 low
= range_beginning
;
11696 if (range_end
> high
)
11702 /* If the first entry is an end-of-list marker, the range
11703 describes an empty scope, i.e. no instructions. */
11709 *high_return
= high
;
11713 /* Get low and high pc attributes from a die. Return 1 if the attributes
11714 are present and valid, otherwise, return 0. Return -1 if the range is
11715 discontinuous, i.e. derived from DW_AT_ranges information. */
11718 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
11719 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
11720 struct partial_symtab
*pst
)
11722 struct attribute
*attr
;
11723 struct attribute
*attr_high
;
11725 CORE_ADDR high
= 0;
11728 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
11731 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
11734 low
= attr_value_as_address (attr
);
11735 high
= attr_value_as_address (attr_high
);
11736 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
11740 /* Found high w/o low attribute. */
11743 /* Found consecutive range of addresses. */
11748 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
11751 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
11752 We take advantage of the fact that DW_AT_ranges does not appear
11753 in DW_TAG_compile_unit of DWO files. */
11754 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
11755 unsigned int ranges_offset
= (DW_UNSND (attr
)
11756 + (need_ranges_base
11760 /* Value of the DW_AT_ranges attribute is the offset in the
11761 .debug_ranges section. */
11762 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
11764 /* Found discontinuous range of addresses. */
11769 /* read_partial_die has also the strict LOW < HIGH requirement. */
11773 /* When using the GNU linker, .gnu.linkonce. sections are used to
11774 eliminate duplicate copies of functions and vtables and such.
11775 The linker will arbitrarily choose one and discard the others.
11776 The AT_*_pc values for such functions refer to local labels in
11777 these sections. If the section from that file was discarded, the
11778 labels are not in the output, so the relocs get a value of 0.
11779 If this is a discarded function, mark the pc bounds as invalid,
11780 so that GDB will ignore it. */
11781 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
11790 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
11791 its low and high PC addresses. Do nothing if these addresses could not
11792 be determined. Otherwise, set LOWPC to the low address if it is smaller,
11793 and HIGHPC to the high address if greater than HIGHPC. */
11796 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
11797 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
11798 struct dwarf2_cu
*cu
)
11800 CORE_ADDR low
, high
;
11801 struct die_info
*child
= die
->child
;
11803 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
11805 *lowpc
= min (*lowpc
, low
);
11806 *highpc
= max (*highpc
, high
);
11809 /* If the language does not allow nested subprograms (either inside
11810 subprograms or lexical blocks), we're done. */
11811 if (cu
->language
!= language_ada
)
11814 /* Check all the children of the given DIE. If it contains nested
11815 subprograms, then check their pc bounds. Likewise, we need to
11816 check lexical blocks as well, as they may also contain subprogram
11818 while (child
&& child
->tag
)
11820 if (child
->tag
== DW_TAG_subprogram
11821 || child
->tag
== DW_TAG_lexical_block
)
11822 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
11823 child
= sibling_die (child
);
11827 /* Get the low and high pc's represented by the scope DIE, and store
11828 them in *LOWPC and *HIGHPC. If the correct values can't be
11829 determined, set *LOWPC to -1 and *HIGHPC to 0. */
11832 get_scope_pc_bounds (struct die_info
*die
,
11833 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
11834 struct dwarf2_cu
*cu
)
11836 CORE_ADDR best_low
= (CORE_ADDR
) -1;
11837 CORE_ADDR best_high
= (CORE_ADDR
) 0;
11838 CORE_ADDR current_low
, current_high
;
11840 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
11842 best_low
= current_low
;
11843 best_high
= current_high
;
11847 struct die_info
*child
= die
->child
;
11849 while (child
&& child
->tag
)
11851 switch (child
->tag
) {
11852 case DW_TAG_subprogram
:
11853 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
11855 case DW_TAG_namespace
:
11856 case DW_TAG_module
:
11857 /* FIXME: carlton/2004-01-16: Should we do this for
11858 DW_TAG_class_type/DW_TAG_structure_type, too? I think
11859 that current GCC's always emit the DIEs corresponding
11860 to definitions of methods of classes as children of a
11861 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
11862 the DIEs giving the declarations, which could be
11863 anywhere). But I don't see any reason why the
11864 standards says that they have to be there. */
11865 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
11867 if (current_low
!= ((CORE_ADDR
) -1))
11869 best_low
= min (best_low
, current_low
);
11870 best_high
= max (best_high
, current_high
);
11878 child
= sibling_die (child
);
11883 *highpc
= best_high
;
11886 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
11890 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
11891 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
11893 struct objfile
*objfile
= cu
->objfile
;
11894 struct attribute
*attr
;
11895 struct attribute
*attr_high
;
11897 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
11900 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
11903 CORE_ADDR low
= attr_value_as_address (attr
);
11904 CORE_ADDR high
= attr_value_as_address (attr_high
);
11906 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
11909 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
11913 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
11916 bfd
*obfd
= objfile
->obfd
;
11917 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
11918 We take advantage of the fact that DW_AT_ranges does not appear
11919 in DW_TAG_compile_unit of DWO files. */
11920 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
11922 /* The value of the DW_AT_ranges attribute is the offset of the
11923 address range list in the .debug_ranges section. */
11924 unsigned long offset
= (DW_UNSND (attr
)
11925 + (need_ranges_base
? cu
->ranges_base
: 0));
11926 const gdb_byte
*buffer
;
11928 /* For some target architectures, but not others, the
11929 read_address function sign-extends the addresses it returns.
11930 To recognize base address selection entries, we need a
11932 unsigned int addr_size
= cu
->header
.addr_size
;
11933 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
11935 /* The base address, to which the next pair is relative. Note
11936 that this 'base' is a DWARF concept: most entries in a range
11937 list are relative, to reduce the number of relocs against the
11938 debugging information. This is separate from this function's
11939 'baseaddr' argument, which GDB uses to relocate debugging
11940 information from a shared library based on the address at
11941 which the library was loaded. */
11942 CORE_ADDR base
= cu
->base_address
;
11943 int base_known
= cu
->base_known
;
11945 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
11946 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
11948 complaint (&symfile_complaints
,
11949 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
11953 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
11957 unsigned int bytes_read
;
11958 CORE_ADDR start
, end
;
11960 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
11961 buffer
+= bytes_read
;
11962 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
11963 buffer
+= bytes_read
;
11965 /* Did we find the end of the range list? */
11966 if (start
== 0 && end
== 0)
11969 /* Did we find a base address selection entry? */
11970 else if ((start
& base_select_mask
) == base_select_mask
)
11976 /* We found an ordinary address range. */
11981 complaint (&symfile_complaints
,
11982 _("Invalid .debug_ranges data "
11983 "(no base address)"));
11989 /* Inverted range entries are invalid. */
11990 complaint (&symfile_complaints
,
11991 _("Invalid .debug_ranges data "
11992 "(inverted range)"));
11996 /* Empty range entries have no effect. */
12000 start
+= base
+ baseaddr
;
12001 end
+= base
+ baseaddr
;
12003 /* A not-uncommon case of bad debug info.
12004 Don't pollute the addrmap with bad data. */
12005 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12007 complaint (&symfile_complaints
,
12008 _(".debug_ranges entry has start address of zero"
12009 " [in module %s]"), objfile_name (objfile
));
12013 record_block_range (block
, start
, end
- 1);
12019 /* Check whether the producer field indicates either of GCC < 4.6, or the
12020 Intel C/C++ compiler, and cache the result in CU. */
12023 check_producer (struct dwarf2_cu
*cu
)
12026 int major
, minor
, release
;
12028 if (cu
->producer
== NULL
)
12030 /* For unknown compilers expect their behavior is DWARF version
12033 GCC started to support .debug_types sections by -gdwarf-4 since
12034 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
12035 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
12036 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
12037 interpreted incorrectly by GDB now - GCC PR debug/48229. */
12039 else if (strncmp (cu
->producer
, "GNU ", strlen ("GNU ")) == 0)
12041 /* Skip any identifier after "GNU " - such as "C++" or "Java". */
12043 cs
= &cu
->producer
[strlen ("GNU ")];
12044 while (*cs
&& !isdigit (*cs
))
12046 if (sscanf (cs
, "%d.%d.%d", &major
, &minor
, &release
) != 3)
12048 /* Not recognized as GCC. */
12052 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
12053 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
12056 else if (strncmp (cu
->producer
, "Intel(R) C", strlen ("Intel(R) C")) == 0)
12057 cu
->producer_is_icc
= 1;
12060 /* For other non-GCC compilers, expect their behavior is DWARF version
12064 cu
->checked_producer
= 1;
12067 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
12068 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
12069 during 4.6.0 experimental. */
12072 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
12074 if (!cu
->checked_producer
)
12075 check_producer (cu
);
12077 return cu
->producer_is_gxx_lt_4_6
;
12080 /* Return the default accessibility type if it is not overriden by
12081 DW_AT_accessibility. */
12083 static enum dwarf_access_attribute
12084 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
12086 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
12088 /* The default DWARF 2 accessibility for members is public, the default
12089 accessibility for inheritance is private. */
12091 if (die
->tag
!= DW_TAG_inheritance
)
12092 return DW_ACCESS_public
;
12094 return DW_ACCESS_private
;
12098 /* DWARF 3+ defines the default accessibility a different way. The same
12099 rules apply now for DW_TAG_inheritance as for the members and it only
12100 depends on the container kind. */
12102 if (die
->parent
->tag
== DW_TAG_class_type
)
12103 return DW_ACCESS_private
;
12105 return DW_ACCESS_public
;
12109 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
12110 offset. If the attribute was not found return 0, otherwise return
12111 1. If it was found but could not properly be handled, set *OFFSET
12115 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
12118 struct attribute
*attr
;
12120 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
12125 /* Note that we do not check for a section offset first here.
12126 This is because DW_AT_data_member_location is new in DWARF 4,
12127 so if we see it, we can assume that a constant form is really
12128 a constant and not a section offset. */
12129 if (attr_form_is_constant (attr
))
12130 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
12131 else if (attr_form_is_section_offset (attr
))
12132 dwarf2_complex_location_expr_complaint ();
12133 else if (attr_form_is_block (attr
))
12134 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12136 dwarf2_complex_location_expr_complaint ();
12144 /* Add an aggregate field to the field list. */
12147 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
12148 struct dwarf2_cu
*cu
)
12150 struct objfile
*objfile
= cu
->objfile
;
12151 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12152 struct nextfield
*new_field
;
12153 struct attribute
*attr
;
12155 const char *fieldname
= "";
12157 /* Allocate a new field list entry and link it in. */
12158 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
12159 make_cleanup (xfree
, new_field
);
12160 memset (new_field
, 0, sizeof (struct nextfield
));
12162 if (die
->tag
== DW_TAG_inheritance
)
12164 new_field
->next
= fip
->baseclasses
;
12165 fip
->baseclasses
= new_field
;
12169 new_field
->next
= fip
->fields
;
12170 fip
->fields
= new_field
;
12174 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
12176 new_field
->accessibility
= DW_UNSND (attr
);
12178 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
12179 if (new_field
->accessibility
!= DW_ACCESS_public
)
12180 fip
->non_public_fields
= 1;
12182 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
12184 new_field
->virtuality
= DW_UNSND (attr
);
12186 new_field
->virtuality
= DW_VIRTUALITY_none
;
12188 fp
= &new_field
->field
;
12190 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
12194 /* Data member other than a C++ static data member. */
12196 /* Get type of field. */
12197 fp
->type
= die_type (die
, cu
);
12199 SET_FIELD_BITPOS (*fp
, 0);
12201 /* Get bit size of field (zero if none). */
12202 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
12205 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
12209 FIELD_BITSIZE (*fp
) = 0;
12212 /* Get bit offset of field. */
12213 if (handle_data_member_location (die
, cu
, &offset
))
12214 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
12215 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
12218 if (gdbarch_bits_big_endian (gdbarch
))
12220 /* For big endian bits, the DW_AT_bit_offset gives the
12221 additional bit offset from the MSB of the containing
12222 anonymous object to the MSB of the field. We don't
12223 have to do anything special since we don't need to
12224 know the size of the anonymous object. */
12225 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
12229 /* For little endian bits, compute the bit offset to the
12230 MSB of the anonymous object, subtract off the number of
12231 bits from the MSB of the field to the MSB of the
12232 object, and then subtract off the number of bits of
12233 the field itself. The result is the bit offset of
12234 the LSB of the field. */
12235 int anonymous_size
;
12236 int bit_offset
= DW_UNSND (attr
);
12238 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12241 /* The size of the anonymous object containing
12242 the bit field is explicit, so use the
12243 indicated size (in bytes). */
12244 anonymous_size
= DW_UNSND (attr
);
12248 /* The size of the anonymous object containing
12249 the bit field must be inferred from the type
12250 attribute of the data member containing the
12252 anonymous_size
= TYPE_LENGTH (fp
->type
);
12254 SET_FIELD_BITPOS (*fp
,
12255 (FIELD_BITPOS (*fp
)
12256 + anonymous_size
* bits_per_byte
12257 - bit_offset
- FIELD_BITSIZE (*fp
)));
12261 /* Get name of field. */
12262 fieldname
= dwarf2_name (die
, cu
);
12263 if (fieldname
== NULL
)
12266 /* The name is already allocated along with this objfile, so we don't
12267 need to duplicate it for the type. */
12268 fp
->name
= fieldname
;
12270 /* Change accessibility for artificial fields (e.g. virtual table
12271 pointer or virtual base class pointer) to private. */
12272 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
12274 FIELD_ARTIFICIAL (*fp
) = 1;
12275 new_field
->accessibility
= DW_ACCESS_private
;
12276 fip
->non_public_fields
= 1;
12279 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
12281 /* C++ static member. */
12283 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
12284 is a declaration, but all versions of G++ as of this writing
12285 (so through at least 3.2.1) incorrectly generate
12286 DW_TAG_variable tags. */
12288 const char *physname
;
12290 /* Get name of field. */
12291 fieldname
= dwarf2_name (die
, cu
);
12292 if (fieldname
== NULL
)
12295 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
12297 /* Only create a symbol if this is an external value.
12298 new_symbol checks this and puts the value in the global symbol
12299 table, which we want. If it is not external, new_symbol
12300 will try to put the value in cu->list_in_scope which is wrong. */
12301 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
12303 /* A static const member, not much different than an enum as far as
12304 we're concerned, except that we can support more types. */
12305 new_symbol (die
, NULL
, cu
);
12308 /* Get physical name. */
12309 physname
= dwarf2_physname (fieldname
, die
, cu
);
12311 /* The name is already allocated along with this objfile, so we don't
12312 need to duplicate it for the type. */
12313 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
12314 FIELD_TYPE (*fp
) = die_type (die
, cu
);
12315 FIELD_NAME (*fp
) = fieldname
;
12317 else if (die
->tag
== DW_TAG_inheritance
)
12321 /* C++ base class field. */
12322 if (handle_data_member_location (die
, cu
, &offset
))
12323 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
12324 FIELD_BITSIZE (*fp
) = 0;
12325 FIELD_TYPE (*fp
) = die_type (die
, cu
);
12326 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
12327 fip
->nbaseclasses
++;
12331 /* Add a typedef defined in the scope of the FIP's class. */
12334 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
12335 struct dwarf2_cu
*cu
)
12337 struct objfile
*objfile
= cu
->objfile
;
12338 struct typedef_field_list
*new_field
;
12339 struct attribute
*attr
;
12340 struct typedef_field
*fp
;
12341 char *fieldname
= "";
12343 /* Allocate a new field list entry and link it in. */
12344 new_field
= xzalloc (sizeof (*new_field
));
12345 make_cleanup (xfree
, new_field
);
12347 gdb_assert (die
->tag
== DW_TAG_typedef
);
12349 fp
= &new_field
->field
;
12351 /* Get name of field. */
12352 fp
->name
= dwarf2_name (die
, cu
);
12353 if (fp
->name
== NULL
)
12356 fp
->type
= read_type_die (die
, cu
);
12358 new_field
->next
= fip
->typedef_field_list
;
12359 fip
->typedef_field_list
= new_field
;
12360 fip
->typedef_field_list_count
++;
12363 /* Create the vector of fields, and attach it to the type. */
12366 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
12367 struct dwarf2_cu
*cu
)
12369 int nfields
= fip
->nfields
;
12371 /* Record the field count, allocate space for the array of fields,
12372 and create blank accessibility bitfields if necessary. */
12373 TYPE_NFIELDS (type
) = nfields
;
12374 TYPE_FIELDS (type
) = (struct field
*)
12375 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
12376 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
12378 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
12380 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12382 TYPE_FIELD_PRIVATE_BITS (type
) =
12383 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12384 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
12386 TYPE_FIELD_PROTECTED_BITS (type
) =
12387 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12388 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
12390 TYPE_FIELD_IGNORE_BITS (type
) =
12391 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12392 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
12395 /* If the type has baseclasses, allocate and clear a bit vector for
12396 TYPE_FIELD_VIRTUAL_BITS. */
12397 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
12399 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
12400 unsigned char *pointer
;
12402 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12403 pointer
= TYPE_ALLOC (type
, num_bytes
);
12404 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
12405 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
12406 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
12409 /* Copy the saved-up fields into the field vector. Start from the head of
12410 the list, adding to the tail of the field array, so that they end up in
12411 the same order in the array in which they were added to the list. */
12412 while (nfields
-- > 0)
12414 struct nextfield
*fieldp
;
12418 fieldp
= fip
->fields
;
12419 fip
->fields
= fieldp
->next
;
12423 fieldp
= fip
->baseclasses
;
12424 fip
->baseclasses
= fieldp
->next
;
12427 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
12428 switch (fieldp
->accessibility
)
12430 case DW_ACCESS_private
:
12431 if (cu
->language
!= language_ada
)
12432 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
12435 case DW_ACCESS_protected
:
12436 if (cu
->language
!= language_ada
)
12437 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
12440 case DW_ACCESS_public
:
12444 /* Unknown accessibility. Complain and treat it as public. */
12446 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
12447 fieldp
->accessibility
);
12451 if (nfields
< fip
->nbaseclasses
)
12453 switch (fieldp
->virtuality
)
12455 case DW_VIRTUALITY_virtual
:
12456 case DW_VIRTUALITY_pure_virtual
:
12457 if (cu
->language
== language_ada
)
12458 error (_("unexpected virtuality in component of Ada type"));
12459 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
12466 /* Return true if this member function is a constructor, false
12470 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
12472 const char *fieldname
;
12473 const char *typename
;
12476 if (die
->parent
== NULL
)
12479 if (die
->parent
->tag
!= DW_TAG_structure_type
12480 && die
->parent
->tag
!= DW_TAG_union_type
12481 && die
->parent
->tag
!= DW_TAG_class_type
)
12484 fieldname
= dwarf2_name (die
, cu
);
12485 typename
= dwarf2_name (die
->parent
, cu
);
12486 if (fieldname
== NULL
|| typename
== NULL
)
12489 len
= strlen (fieldname
);
12490 return (strncmp (fieldname
, typename
, len
) == 0
12491 && (typename
[len
] == '\0' || typename
[len
] == '<'));
12494 /* Add a member function to the proper fieldlist. */
12497 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
12498 struct type
*type
, struct dwarf2_cu
*cu
)
12500 struct objfile
*objfile
= cu
->objfile
;
12501 struct attribute
*attr
;
12502 struct fnfieldlist
*flp
;
12504 struct fn_field
*fnp
;
12505 const char *fieldname
;
12506 struct nextfnfield
*new_fnfield
;
12507 struct type
*this_type
;
12508 enum dwarf_access_attribute accessibility
;
12510 if (cu
->language
== language_ada
)
12511 error (_("unexpected member function in Ada type"));
12513 /* Get name of member function. */
12514 fieldname
= dwarf2_name (die
, cu
);
12515 if (fieldname
== NULL
)
12518 /* Look up member function name in fieldlist. */
12519 for (i
= 0; i
< fip
->nfnfields
; i
++)
12521 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
12525 /* Create new list element if necessary. */
12526 if (i
< fip
->nfnfields
)
12527 flp
= &fip
->fnfieldlists
[i
];
12530 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
12532 fip
->fnfieldlists
= (struct fnfieldlist
*)
12533 xrealloc (fip
->fnfieldlists
,
12534 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
12535 * sizeof (struct fnfieldlist
));
12536 if (fip
->nfnfields
== 0)
12537 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
12539 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
12540 flp
->name
= fieldname
;
12543 i
= fip
->nfnfields
++;
12546 /* Create a new member function field and chain it to the field list
12548 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
12549 make_cleanup (xfree
, new_fnfield
);
12550 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
12551 new_fnfield
->next
= flp
->head
;
12552 flp
->head
= new_fnfield
;
12555 /* Fill in the member function field info. */
12556 fnp
= &new_fnfield
->fnfield
;
12558 /* Delay processing of the physname until later. */
12559 if (cu
->language
== language_cplus
|| cu
->language
== language_java
)
12561 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
12566 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
12567 fnp
->physname
= physname
? physname
: "";
12570 fnp
->type
= alloc_type (objfile
);
12571 this_type
= read_type_die (die
, cu
);
12572 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
12574 int nparams
= TYPE_NFIELDS (this_type
);
12576 /* TYPE is the domain of this method, and THIS_TYPE is the type
12577 of the method itself (TYPE_CODE_METHOD). */
12578 smash_to_method_type (fnp
->type
, type
,
12579 TYPE_TARGET_TYPE (this_type
),
12580 TYPE_FIELDS (this_type
),
12581 TYPE_NFIELDS (this_type
),
12582 TYPE_VARARGS (this_type
));
12584 /* Handle static member functions.
12585 Dwarf2 has no clean way to discern C++ static and non-static
12586 member functions. G++ helps GDB by marking the first
12587 parameter for non-static member functions (which is the this
12588 pointer) as artificial. We obtain this information from
12589 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
12590 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
12591 fnp
->voffset
= VOFFSET_STATIC
;
12594 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
12595 dwarf2_full_name (fieldname
, die
, cu
));
12597 /* Get fcontext from DW_AT_containing_type if present. */
12598 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
12599 fnp
->fcontext
= die_containing_type (die
, cu
);
12601 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
12602 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
12604 /* Get accessibility. */
12605 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
12607 accessibility
= DW_UNSND (attr
);
12609 accessibility
= dwarf2_default_access_attribute (die
, cu
);
12610 switch (accessibility
)
12612 case DW_ACCESS_private
:
12613 fnp
->is_private
= 1;
12615 case DW_ACCESS_protected
:
12616 fnp
->is_protected
= 1;
12620 /* Check for artificial methods. */
12621 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
12622 if (attr
&& DW_UNSND (attr
) != 0)
12623 fnp
->is_artificial
= 1;
12625 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
12627 /* Get index in virtual function table if it is a virtual member
12628 function. For older versions of GCC, this is an offset in the
12629 appropriate virtual table, as specified by DW_AT_containing_type.
12630 For everyone else, it is an expression to be evaluated relative
12631 to the object address. */
12633 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
12636 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
12638 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
12640 /* Old-style GCC. */
12641 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
12643 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
12644 || (DW_BLOCK (attr
)->size
> 1
12645 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
12646 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
12648 struct dwarf_block blk
;
12651 offset
= (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
12653 blk
.size
= DW_BLOCK (attr
)->size
- offset
;
12654 blk
.data
= DW_BLOCK (attr
)->data
+ offset
;
12655 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12656 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
12657 dwarf2_complex_location_expr_complaint ();
12659 fnp
->voffset
/= cu
->header
.addr_size
;
12663 dwarf2_complex_location_expr_complaint ();
12665 if (!fnp
->fcontext
)
12666 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
12668 else if (attr_form_is_section_offset (attr
))
12670 dwarf2_complex_location_expr_complaint ();
12674 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
12680 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
12681 if (attr
&& DW_UNSND (attr
))
12683 /* GCC does this, as of 2008-08-25; PR debug/37237. */
12684 complaint (&symfile_complaints
,
12685 _("Member function \"%s\" (offset %d) is virtual "
12686 "but the vtable offset is not specified"),
12687 fieldname
, die
->offset
.sect_off
);
12688 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12689 TYPE_CPLUS_DYNAMIC (type
) = 1;
12694 /* Create the vector of member function fields, and attach it to the type. */
12697 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
12698 struct dwarf2_cu
*cu
)
12700 struct fnfieldlist
*flp
;
12703 if (cu
->language
== language_ada
)
12704 error (_("unexpected member functions in Ada type"));
12706 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12707 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
12708 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
12710 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
12712 struct nextfnfield
*nfp
= flp
->head
;
12713 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
12716 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
12717 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
12718 fn_flp
->fn_fields
= (struct fn_field
*)
12719 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
12720 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
12721 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
12724 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
12727 /* Returns non-zero if NAME is the name of a vtable member in CU's
12728 language, zero otherwise. */
12730 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
12732 static const char vptr
[] = "_vptr";
12733 static const char vtable
[] = "vtable";
12735 /* Look for the C++ and Java forms of the vtable. */
12736 if ((cu
->language
== language_java
12737 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
12738 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
12739 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
12745 /* GCC outputs unnamed structures that are really pointers to member
12746 functions, with the ABI-specified layout. If TYPE describes
12747 such a structure, smash it into a member function type.
12749 GCC shouldn't do this; it should just output pointer to member DIEs.
12750 This is GCC PR debug/28767. */
12753 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
12755 struct type
*pfn_type
, *domain_type
, *new_type
;
12757 /* Check for a structure with no name and two children. */
12758 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
12761 /* Check for __pfn and __delta members. */
12762 if (TYPE_FIELD_NAME (type
, 0) == NULL
12763 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
12764 || TYPE_FIELD_NAME (type
, 1) == NULL
12765 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
12768 /* Find the type of the method. */
12769 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
12770 if (pfn_type
== NULL
12771 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
12772 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
12775 /* Look for the "this" argument. */
12776 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
12777 if (TYPE_NFIELDS (pfn_type
) == 0
12778 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
12779 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
12782 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
12783 new_type
= alloc_type (objfile
);
12784 smash_to_method_type (new_type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
12785 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
12786 TYPE_VARARGS (pfn_type
));
12787 smash_to_methodptr_type (type
, new_type
);
12790 /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler
12794 producer_is_icc (struct dwarf2_cu
*cu
)
12796 if (!cu
->checked_producer
)
12797 check_producer (cu
);
12799 return cu
->producer_is_icc
;
12802 /* Called when we find the DIE that starts a structure or union scope
12803 (definition) to create a type for the structure or union. Fill in
12804 the type's name and general properties; the members will not be
12805 processed until process_structure_scope.
12807 NOTE: we need to call these functions regardless of whether or not the
12808 DIE has a DW_AT_name attribute, since it might be an anonymous
12809 structure or union. This gets the type entered into our set of
12810 user defined types.
12812 However, if the structure is incomplete (an opaque struct/union)
12813 then suppress creating a symbol table entry for it since gdb only
12814 wants to find the one with the complete definition. Note that if
12815 it is complete, we just call new_symbol, which does it's own
12816 checking about whether the struct/union is anonymous or not (and
12817 suppresses creating a symbol table entry itself). */
12819 static struct type
*
12820 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12822 struct objfile
*objfile
= cu
->objfile
;
12824 struct attribute
*attr
;
12827 /* If the definition of this type lives in .debug_types, read that type.
12828 Don't follow DW_AT_specification though, that will take us back up
12829 the chain and we want to go down. */
12830 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
12833 type
= get_DW_AT_signature_type (die
, attr
, cu
);
12835 /* The type's CU may not be the same as CU.
12836 Ensure TYPE is recorded with CU in die_type_hash. */
12837 return set_die_type (die
, type
, cu
);
12840 type
= alloc_type (objfile
);
12841 INIT_CPLUS_SPECIFIC (type
);
12843 name
= dwarf2_name (die
, cu
);
12846 if (cu
->language
== language_cplus
12847 || cu
->language
== language_java
)
12849 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
12851 /* dwarf2_full_name might have already finished building the DIE's
12852 type. If so, there is no need to continue. */
12853 if (get_die_type (die
, cu
) != NULL
)
12854 return get_die_type (die
, cu
);
12856 TYPE_TAG_NAME (type
) = full_name
;
12857 if (die
->tag
== DW_TAG_structure_type
12858 || die
->tag
== DW_TAG_class_type
)
12859 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
12863 /* The name is already allocated along with this objfile, so
12864 we don't need to duplicate it for the type. */
12865 TYPE_TAG_NAME (type
) = name
;
12866 if (die
->tag
== DW_TAG_class_type
)
12867 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
12871 if (die
->tag
== DW_TAG_structure_type
)
12873 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
12875 else if (die
->tag
== DW_TAG_union_type
)
12877 TYPE_CODE (type
) = TYPE_CODE_UNION
;
12881 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
12884 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
12885 TYPE_DECLARED_CLASS (type
) = 1;
12887 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12890 TYPE_LENGTH (type
) = DW_UNSND (attr
);
12894 TYPE_LENGTH (type
) = 0;
12897 if (producer_is_icc (cu
))
12899 /* ICC does not output the required DW_AT_declaration
12900 on incomplete types, but gives them a size of zero. */
12903 TYPE_STUB_SUPPORTED (type
) = 1;
12905 if (die_is_declaration (die
, cu
))
12906 TYPE_STUB (type
) = 1;
12907 else if (attr
== NULL
&& die
->child
== NULL
12908 && producer_is_realview (cu
->producer
))
12909 /* RealView does not output the required DW_AT_declaration
12910 on incomplete types. */
12911 TYPE_STUB (type
) = 1;
12913 /* We need to add the type field to the die immediately so we don't
12914 infinitely recurse when dealing with pointers to the structure
12915 type within the structure itself. */
12916 set_die_type (die
, type
, cu
);
12918 /* set_die_type should be already done. */
12919 set_descriptive_type (type
, die
, cu
);
12924 /* Finish creating a structure or union type, including filling in
12925 its members and creating a symbol for it. */
12928 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
12930 struct objfile
*objfile
= cu
->objfile
;
12931 struct die_info
*child_die
= die
->child
;
12934 type
= get_die_type (die
, cu
);
12936 type
= read_structure_type (die
, cu
);
12938 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
12940 struct field_info fi
;
12941 struct die_info
*child_die
;
12942 VEC (symbolp
) *template_args
= NULL
;
12943 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
12945 memset (&fi
, 0, sizeof (struct field_info
));
12947 child_die
= die
->child
;
12949 while (child_die
&& child_die
->tag
)
12951 if (child_die
->tag
== DW_TAG_member
12952 || child_die
->tag
== DW_TAG_variable
)
12954 /* NOTE: carlton/2002-11-05: A C++ static data member
12955 should be a DW_TAG_member that is a declaration, but
12956 all versions of G++ as of this writing (so through at
12957 least 3.2.1) incorrectly generate DW_TAG_variable
12958 tags for them instead. */
12959 dwarf2_add_field (&fi
, child_die
, cu
);
12961 else if (child_die
->tag
== DW_TAG_subprogram
)
12963 /* C++ member function. */
12964 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
12966 else if (child_die
->tag
== DW_TAG_inheritance
)
12968 /* C++ base class field. */
12969 dwarf2_add_field (&fi
, child_die
, cu
);
12971 else if (child_die
->tag
== DW_TAG_typedef
)
12972 dwarf2_add_typedef (&fi
, child_die
, cu
);
12973 else if (child_die
->tag
== DW_TAG_template_type_param
12974 || child_die
->tag
== DW_TAG_template_value_param
)
12976 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
12979 VEC_safe_push (symbolp
, template_args
, arg
);
12982 child_die
= sibling_die (child_die
);
12985 /* Attach template arguments to type. */
12986 if (! VEC_empty (symbolp
, template_args
))
12988 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12989 TYPE_N_TEMPLATE_ARGUMENTS (type
)
12990 = VEC_length (symbolp
, template_args
);
12991 TYPE_TEMPLATE_ARGUMENTS (type
)
12992 = obstack_alloc (&objfile
->objfile_obstack
,
12993 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
12994 * sizeof (struct symbol
*)));
12995 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
12996 VEC_address (symbolp
, template_args
),
12997 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
12998 * sizeof (struct symbol
*)));
12999 VEC_free (symbolp
, template_args
);
13002 /* Attach fields and member functions to the type. */
13004 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
13007 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
13009 /* Get the type which refers to the base class (possibly this
13010 class itself) which contains the vtable pointer for the current
13011 class from the DW_AT_containing_type attribute. This use of
13012 DW_AT_containing_type is a GNU extension. */
13014 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
13016 struct type
*t
= die_containing_type (die
, cu
);
13018 TYPE_VPTR_BASETYPE (type
) = t
;
13023 /* Our own class provides vtbl ptr. */
13024 for (i
= TYPE_NFIELDS (t
) - 1;
13025 i
>= TYPE_N_BASECLASSES (t
);
13028 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
13030 if (is_vtable_name (fieldname
, cu
))
13032 TYPE_VPTR_FIELDNO (type
) = i
;
13037 /* Complain if virtual function table field not found. */
13038 if (i
< TYPE_N_BASECLASSES (t
))
13039 complaint (&symfile_complaints
,
13040 _("virtual function table pointer "
13041 "not found when defining class '%s'"),
13042 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
13047 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
13050 else if (cu
->producer
13051 && strncmp (cu
->producer
,
13052 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
13054 /* The IBM XLC compiler does not provide direct indication
13055 of the containing type, but the vtable pointer is
13056 always named __vfp. */
13060 for (i
= TYPE_NFIELDS (type
) - 1;
13061 i
>= TYPE_N_BASECLASSES (type
);
13064 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
13066 TYPE_VPTR_FIELDNO (type
) = i
;
13067 TYPE_VPTR_BASETYPE (type
) = type
;
13074 /* Copy fi.typedef_field_list linked list elements content into the
13075 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
13076 if (fi
.typedef_field_list
)
13078 int i
= fi
.typedef_field_list_count
;
13080 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13081 TYPE_TYPEDEF_FIELD_ARRAY (type
)
13082 = TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
);
13083 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
13085 /* Reverse the list order to keep the debug info elements order. */
13088 struct typedef_field
*dest
, *src
;
13090 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
13091 src
= &fi
.typedef_field_list
->field
;
13092 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
13097 do_cleanups (back_to
);
13099 if (HAVE_CPLUS_STRUCT (type
))
13100 TYPE_CPLUS_REALLY_JAVA (type
) = cu
->language
== language_java
;
13103 quirk_gcc_member_function_pointer (type
, objfile
);
13105 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
13106 snapshots) has been known to create a die giving a declaration
13107 for a class that has, as a child, a die giving a definition for a
13108 nested class. So we have to process our children even if the
13109 current die is a declaration. Normally, of course, a declaration
13110 won't have any children at all. */
13112 while (child_die
!= NULL
&& child_die
->tag
)
13114 if (child_die
->tag
== DW_TAG_member
13115 || child_die
->tag
== DW_TAG_variable
13116 || child_die
->tag
== DW_TAG_inheritance
13117 || child_die
->tag
== DW_TAG_template_value_param
13118 || child_die
->tag
== DW_TAG_template_type_param
)
13123 process_die (child_die
, cu
);
13125 child_die
= sibling_die (child_die
);
13128 /* Do not consider external references. According to the DWARF standard,
13129 these DIEs are identified by the fact that they have no byte_size
13130 attribute, and a declaration attribute. */
13131 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
13132 || !die_is_declaration (die
, cu
))
13133 new_symbol (die
, type
, cu
);
13136 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
13137 update TYPE using some information only available in DIE's children. */
13140 update_enumeration_type_from_children (struct die_info
*die
,
13142 struct dwarf2_cu
*cu
)
13144 struct obstack obstack
;
13145 struct die_info
*child_die
= die
->child
;
13146 int unsigned_enum
= 1;
13149 struct cleanup
*old_chain
;
13151 obstack_init (&obstack
);
13152 old_chain
= make_cleanup_obstack_free (&obstack
);
13154 while (child_die
!= NULL
&& child_die
->tag
)
13156 struct attribute
*attr
;
13158 const gdb_byte
*bytes
;
13159 struct dwarf2_locexpr_baton
*baton
;
13161 if (child_die
->tag
!= DW_TAG_enumerator
)
13164 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
13168 name
= dwarf2_name (child_die
, cu
);
13170 name
= "<anonymous enumerator>";
13172 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
13173 &value
, &bytes
, &baton
);
13179 else if ((mask
& value
) != 0)
13184 /* If we already know that the enum type is neither unsigned, nor
13185 a flag type, no need to look at the rest of the enumerates. */
13186 if (!unsigned_enum
&& !flag_enum
)
13188 child_die
= sibling_die (child_die
);
13192 TYPE_UNSIGNED (type
) = 1;
13194 TYPE_FLAG_ENUM (type
) = 1;
13196 do_cleanups (old_chain
);
13199 /* Given a DW_AT_enumeration_type die, set its type. We do not
13200 complete the type's fields yet, or create any symbols. */
13202 static struct type
*
13203 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13205 struct objfile
*objfile
= cu
->objfile
;
13207 struct attribute
*attr
;
13210 /* If the definition of this type lives in .debug_types, read that type.
13211 Don't follow DW_AT_specification though, that will take us back up
13212 the chain and we want to go down. */
13213 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
13216 type
= get_DW_AT_signature_type (die
, attr
, cu
);
13218 /* The type's CU may not be the same as CU.
13219 Ensure TYPE is recorded with CU in die_type_hash. */
13220 return set_die_type (die
, type
, cu
);
13223 type
= alloc_type (objfile
);
13225 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
13226 name
= dwarf2_full_name (NULL
, die
, cu
);
13228 TYPE_TAG_NAME (type
) = name
;
13230 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
13233 struct type
*underlying_type
= die_type (die
, cu
);
13235 TYPE_TARGET_TYPE (type
) = underlying_type
;
13238 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13241 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13245 TYPE_LENGTH (type
) = 0;
13248 /* The enumeration DIE can be incomplete. In Ada, any type can be
13249 declared as private in the package spec, and then defined only
13250 inside the package body. Such types are known as Taft Amendment
13251 Types. When another package uses such a type, an incomplete DIE
13252 may be generated by the compiler. */
13253 if (die_is_declaration (die
, cu
))
13254 TYPE_STUB (type
) = 1;
13256 /* Finish the creation of this type by using the enum's children.
13257 We must call this even when the underlying type has been provided
13258 so that we can determine if we're looking at a "flag" enum. */
13259 update_enumeration_type_from_children (die
, type
, cu
);
13261 /* If this type has an underlying type that is not a stub, then we
13262 may use its attributes. We always use the "unsigned" attribute
13263 in this situation, because ordinarily we guess whether the type
13264 is unsigned -- but the guess can be wrong and the underlying type
13265 can tell us the reality. However, we defer to a local size
13266 attribute if one exists, because this lets the compiler override
13267 the underlying type if needed. */
13268 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
13270 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
13271 if (TYPE_LENGTH (type
) == 0)
13272 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
13275 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
13277 return set_die_type (die
, type
, cu
);
13280 /* Given a pointer to a die which begins an enumeration, process all
13281 the dies that define the members of the enumeration, and create the
13282 symbol for the enumeration type.
13284 NOTE: We reverse the order of the element list. */
13287 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13289 struct type
*this_type
;
13291 this_type
= get_die_type (die
, cu
);
13292 if (this_type
== NULL
)
13293 this_type
= read_enumeration_type (die
, cu
);
13295 if (die
->child
!= NULL
)
13297 struct die_info
*child_die
;
13298 struct symbol
*sym
;
13299 struct field
*fields
= NULL
;
13300 int num_fields
= 0;
13303 child_die
= die
->child
;
13304 while (child_die
&& child_die
->tag
)
13306 if (child_die
->tag
!= DW_TAG_enumerator
)
13308 process_die (child_die
, cu
);
13312 name
= dwarf2_name (child_die
, cu
);
13315 sym
= new_symbol (child_die
, this_type
, cu
);
13317 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
13319 fields
= (struct field
*)
13321 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
13322 * sizeof (struct field
));
13325 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
13326 FIELD_TYPE (fields
[num_fields
]) = NULL
;
13327 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
13328 FIELD_BITSIZE (fields
[num_fields
]) = 0;
13334 child_die
= sibling_die (child_die
);
13339 TYPE_NFIELDS (this_type
) = num_fields
;
13340 TYPE_FIELDS (this_type
) = (struct field
*)
13341 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
13342 memcpy (TYPE_FIELDS (this_type
), fields
,
13343 sizeof (struct field
) * num_fields
);
13348 /* If we are reading an enum from a .debug_types unit, and the enum
13349 is a declaration, and the enum is not the signatured type in the
13350 unit, then we do not want to add a symbol for it. Adding a
13351 symbol would in some cases obscure the true definition of the
13352 enum, giving users an incomplete type when the definition is
13353 actually available. Note that we do not want to do this for all
13354 enums which are just declarations, because C++0x allows forward
13355 enum declarations. */
13356 if (cu
->per_cu
->is_debug_types
13357 && die_is_declaration (die
, cu
))
13359 struct signatured_type
*sig_type
;
13361 sig_type
= (struct signatured_type
*) cu
->per_cu
;
13362 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
13363 if (sig_type
->type_offset_in_section
.sect_off
!= die
->offset
.sect_off
)
13367 new_symbol (die
, this_type
, cu
);
13370 /* Extract all information from a DW_TAG_array_type DIE and put it in
13371 the DIE's type field. For now, this only handles one dimensional
13374 static struct type
*
13375 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13377 struct objfile
*objfile
= cu
->objfile
;
13378 struct die_info
*child_die
;
13380 struct type
*element_type
, *range_type
, *index_type
;
13381 struct type
**range_types
= NULL
;
13382 struct attribute
*attr
;
13384 struct cleanup
*back_to
;
13386 unsigned int bit_stride
= 0;
13388 element_type
= die_type (die
, cu
);
13390 /* The die_type call above may have already set the type for this DIE. */
13391 type
= get_die_type (die
, cu
);
13395 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
13397 bit_stride
= DW_UNSND (attr
) * 8;
13399 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
13401 bit_stride
= DW_UNSND (attr
);
13403 /* Irix 6.2 native cc creates array types without children for
13404 arrays with unspecified length. */
13405 if (die
->child
== NULL
)
13407 index_type
= objfile_type (objfile
)->builtin_int
;
13408 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
13409 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
13411 return set_die_type (die
, type
, cu
);
13414 back_to
= make_cleanup (null_cleanup
, NULL
);
13415 child_die
= die
->child
;
13416 while (child_die
&& child_die
->tag
)
13418 if (child_die
->tag
== DW_TAG_subrange_type
)
13420 struct type
*child_type
= read_type_die (child_die
, cu
);
13422 if (child_type
!= NULL
)
13424 /* The range type was succesfully read. Save it for the
13425 array type creation. */
13426 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
13428 range_types
= (struct type
**)
13429 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
13430 * sizeof (struct type
*));
13432 make_cleanup (free_current_contents
, &range_types
);
13434 range_types
[ndim
++] = child_type
;
13437 child_die
= sibling_die (child_die
);
13440 /* Dwarf2 dimensions are output from left to right, create the
13441 necessary array types in backwards order. */
13443 type
= element_type
;
13445 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
13450 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
13456 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
13460 /* Understand Dwarf2 support for vector types (like they occur on
13461 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
13462 array type. This is not part of the Dwarf2/3 standard yet, but a
13463 custom vendor extension. The main difference between a regular
13464 array and the vector variant is that vectors are passed by value
13466 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
13468 make_vector_type (type
);
13470 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
13471 implementation may choose to implement triple vectors using this
13473 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13476 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
13477 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13479 complaint (&symfile_complaints
,
13480 _("DW_AT_byte_size for array type smaller "
13481 "than the total size of elements"));
13484 name
= dwarf2_name (die
, cu
);
13486 TYPE_NAME (type
) = name
;
13488 /* Install the type in the die. */
13489 set_die_type (die
, type
, cu
);
13491 /* set_die_type should be already done. */
13492 set_descriptive_type (type
, die
, cu
);
13494 do_cleanups (back_to
);
13499 static enum dwarf_array_dim_ordering
13500 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
13502 struct attribute
*attr
;
13504 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
13506 if (attr
) return DW_SND (attr
);
13508 /* GNU F77 is a special case, as at 08/2004 array type info is the
13509 opposite order to the dwarf2 specification, but data is still
13510 laid out as per normal fortran.
13512 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
13513 version checking. */
13515 if (cu
->language
== language_fortran
13516 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
13518 return DW_ORD_row_major
;
13521 switch (cu
->language_defn
->la_array_ordering
)
13523 case array_column_major
:
13524 return DW_ORD_col_major
;
13525 case array_row_major
:
13527 return DW_ORD_row_major
;
13531 /* Extract all information from a DW_TAG_set_type DIE and put it in
13532 the DIE's type field. */
13534 static struct type
*
13535 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13537 struct type
*domain_type
, *set_type
;
13538 struct attribute
*attr
;
13540 domain_type
= die_type (die
, cu
);
13542 /* The die_type call above may have already set the type for this DIE. */
13543 set_type
= get_die_type (die
, cu
);
13547 set_type
= create_set_type (NULL
, domain_type
);
13549 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13551 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
13553 return set_die_type (die
, set_type
, cu
);
13556 /* A helper for read_common_block that creates a locexpr baton.
13557 SYM is the symbol which we are marking as computed.
13558 COMMON_DIE is the DIE for the common block.
13559 COMMON_LOC is the location expression attribute for the common
13561 MEMBER_LOC is the location expression attribute for the particular
13562 member of the common block that we are processing.
13563 CU is the CU from which the above come. */
13566 mark_common_block_symbol_computed (struct symbol
*sym
,
13567 struct die_info
*common_die
,
13568 struct attribute
*common_loc
,
13569 struct attribute
*member_loc
,
13570 struct dwarf2_cu
*cu
)
13572 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13573 struct dwarf2_locexpr_baton
*baton
;
13575 unsigned int cu_off
;
13576 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
13577 LONGEST offset
= 0;
13579 gdb_assert (common_loc
&& member_loc
);
13580 gdb_assert (attr_form_is_block (common_loc
));
13581 gdb_assert (attr_form_is_block (member_loc
)
13582 || attr_form_is_constant (member_loc
));
13584 baton
= obstack_alloc (&objfile
->objfile_obstack
,
13585 sizeof (struct dwarf2_locexpr_baton
));
13586 baton
->per_cu
= cu
->per_cu
;
13587 gdb_assert (baton
->per_cu
);
13589 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
13591 if (attr_form_is_constant (member_loc
))
13593 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
13594 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
13597 baton
->size
+= DW_BLOCK (member_loc
)->size
;
13599 ptr
= obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
13602 *ptr
++ = DW_OP_call4
;
13603 cu_off
= common_die
->offset
.sect_off
- cu
->per_cu
->offset
.sect_off
;
13604 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
13607 if (attr_form_is_constant (member_loc
))
13609 *ptr
++ = DW_OP_addr
;
13610 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
13611 ptr
+= cu
->header
.addr_size
;
13615 /* We have to copy the data here, because DW_OP_call4 will only
13616 use a DW_AT_location attribute. */
13617 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
13618 ptr
+= DW_BLOCK (member_loc
)->size
;
13621 *ptr
++ = DW_OP_plus
;
13622 gdb_assert (ptr
- baton
->data
== baton
->size
);
13624 SYMBOL_LOCATION_BATON (sym
) = baton
;
13625 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
13628 /* Create appropriate locally-scoped variables for all the
13629 DW_TAG_common_block entries. Also create a struct common_block
13630 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
13631 is used to sepate the common blocks name namespace from regular
13635 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
13637 struct attribute
*attr
;
13639 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
13642 /* Support the .debug_loc offsets. */
13643 if (attr_form_is_block (attr
))
13647 else if (attr_form_is_section_offset (attr
))
13649 dwarf2_complex_location_expr_complaint ();
13654 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
13655 "common block member");
13660 if (die
->child
!= NULL
)
13662 struct objfile
*objfile
= cu
->objfile
;
13663 struct die_info
*child_die
;
13664 size_t n_entries
= 0, size
;
13665 struct common_block
*common_block
;
13666 struct symbol
*sym
;
13668 for (child_die
= die
->child
;
13669 child_die
&& child_die
->tag
;
13670 child_die
= sibling_die (child_die
))
13673 size
= (sizeof (struct common_block
)
13674 + (n_entries
- 1) * sizeof (struct symbol
*));
13675 common_block
= obstack_alloc (&objfile
->objfile_obstack
, size
);
13676 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
13677 common_block
->n_entries
= 0;
13679 for (child_die
= die
->child
;
13680 child_die
&& child_die
->tag
;
13681 child_die
= sibling_die (child_die
))
13683 /* Create the symbol in the DW_TAG_common_block block in the current
13685 sym
= new_symbol (child_die
, NULL
, cu
);
13688 struct attribute
*member_loc
;
13690 common_block
->contents
[common_block
->n_entries
++] = sym
;
13692 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
13696 /* GDB has handled this for a long time, but it is
13697 not specified by DWARF. It seems to have been
13698 emitted by gfortran at least as recently as:
13699 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
13700 complaint (&symfile_complaints
,
13701 _("Variable in common block has "
13702 "DW_AT_data_member_location "
13703 "- DIE at 0x%x [in module %s]"),
13704 child_die
->offset
.sect_off
,
13705 objfile_name (cu
->objfile
));
13707 if (attr_form_is_section_offset (member_loc
))
13708 dwarf2_complex_location_expr_complaint ();
13709 else if (attr_form_is_constant (member_loc
)
13710 || attr_form_is_block (member_loc
))
13713 mark_common_block_symbol_computed (sym
, die
, attr
,
13717 dwarf2_complex_location_expr_complaint ();
13722 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
13723 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
13727 /* Create a type for a C++ namespace. */
13729 static struct type
*
13730 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13732 struct objfile
*objfile
= cu
->objfile
;
13733 const char *previous_prefix
, *name
;
13737 /* For extensions, reuse the type of the original namespace. */
13738 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
13740 struct die_info
*ext_die
;
13741 struct dwarf2_cu
*ext_cu
= cu
;
13743 ext_die
= dwarf2_extension (die
, &ext_cu
);
13744 type
= read_type_die (ext_die
, ext_cu
);
13746 /* EXT_CU may not be the same as CU.
13747 Ensure TYPE is recorded with CU in die_type_hash. */
13748 return set_die_type (die
, type
, cu
);
13751 name
= namespace_name (die
, &is_anonymous
, cu
);
13753 /* Now build the name of the current namespace. */
13755 previous_prefix
= determine_prefix (die
, cu
);
13756 if (previous_prefix
[0] != '\0')
13757 name
= typename_concat (&objfile
->objfile_obstack
,
13758 previous_prefix
, name
, 0, cu
);
13760 /* Create the type. */
13761 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
13763 TYPE_NAME (type
) = name
;
13764 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
13766 return set_die_type (die
, type
, cu
);
13769 /* Read a C++ namespace. */
13772 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
13774 struct objfile
*objfile
= cu
->objfile
;
13777 /* Add a symbol associated to this if we haven't seen the namespace
13778 before. Also, add a using directive if it's an anonymous
13781 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
13785 type
= read_type_die (die
, cu
);
13786 new_symbol (die
, type
, cu
);
13788 namespace_name (die
, &is_anonymous
, cu
);
13791 const char *previous_prefix
= determine_prefix (die
, cu
);
13793 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
), NULL
,
13794 NULL
, NULL
, 0, &objfile
->objfile_obstack
);
13798 if (die
->child
!= NULL
)
13800 struct die_info
*child_die
= die
->child
;
13802 while (child_die
&& child_die
->tag
)
13804 process_die (child_die
, cu
);
13805 child_die
= sibling_die (child_die
);
13810 /* Read a Fortran module as type. This DIE can be only a declaration used for
13811 imported module. Still we need that type as local Fortran "use ... only"
13812 declaration imports depend on the created type in determine_prefix. */
13814 static struct type
*
13815 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13817 struct objfile
*objfile
= cu
->objfile
;
13818 const char *module_name
;
13821 module_name
= dwarf2_name (die
, cu
);
13823 complaint (&symfile_complaints
,
13824 _("DW_TAG_module has no name, offset 0x%x"),
13825 die
->offset
.sect_off
);
13826 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
13828 /* determine_prefix uses TYPE_TAG_NAME. */
13829 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
13831 return set_die_type (die
, type
, cu
);
13834 /* Read a Fortran module. */
13837 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
13839 struct die_info
*child_die
= die
->child
;
13842 type
= read_type_die (die
, cu
);
13843 new_symbol (die
, type
, cu
);
13845 while (child_die
&& child_die
->tag
)
13847 process_die (child_die
, cu
);
13848 child_die
= sibling_die (child_die
);
13852 /* Return the name of the namespace represented by DIE. Set
13853 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
13856 static const char *
13857 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
13859 struct die_info
*current_die
;
13860 const char *name
= NULL
;
13862 /* Loop through the extensions until we find a name. */
13864 for (current_die
= die
;
13865 current_die
!= NULL
;
13866 current_die
= dwarf2_extension (die
, &cu
))
13868 name
= dwarf2_name (current_die
, cu
);
13873 /* Is it an anonymous namespace? */
13875 *is_anonymous
= (name
== NULL
);
13877 name
= CP_ANONYMOUS_NAMESPACE_STR
;
13882 /* Extract all information from a DW_TAG_pointer_type DIE and add to
13883 the user defined type vector. */
13885 static struct type
*
13886 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13888 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
13889 struct comp_unit_head
*cu_header
= &cu
->header
;
13891 struct attribute
*attr_byte_size
;
13892 struct attribute
*attr_address_class
;
13893 int byte_size
, addr_class
;
13894 struct type
*target_type
;
13896 target_type
= die_type (die
, cu
);
13898 /* The die_type call above may have already set the type for this DIE. */
13899 type
= get_die_type (die
, cu
);
13903 type
= lookup_pointer_type (target_type
);
13905 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13906 if (attr_byte_size
)
13907 byte_size
= DW_UNSND (attr_byte_size
);
13909 byte_size
= cu_header
->addr_size
;
13911 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
13912 if (attr_address_class
)
13913 addr_class
= DW_UNSND (attr_address_class
);
13915 addr_class
= DW_ADDR_none
;
13917 /* If the pointer size or address class is different than the
13918 default, create a type variant marked as such and set the
13919 length accordingly. */
13920 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
13922 if (gdbarch_address_class_type_flags_p (gdbarch
))
13926 type_flags
= gdbarch_address_class_type_flags
13927 (gdbarch
, byte_size
, addr_class
);
13928 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
13930 type
= make_type_with_address_space (type
, type_flags
);
13932 else if (TYPE_LENGTH (type
) != byte_size
)
13934 complaint (&symfile_complaints
,
13935 _("invalid pointer size %d"), byte_size
);
13939 /* Should we also complain about unhandled address classes? */
13943 TYPE_LENGTH (type
) = byte_size
;
13944 return set_die_type (die
, type
, cu
);
13947 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
13948 the user defined type vector. */
13950 static struct type
*
13951 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13954 struct type
*to_type
;
13955 struct type
*domain
;
13957 to_type
= die_type (die
, cu
);
13958 domain
= die_containing_type (die
, cu
);
13960 /* The calls above may have already set the type for this DIE. */
13961 type
= get_die_type (die
, cu
);
13965 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
13966 type
= lookup_methodptr_type (to_type
);
13967 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
13969 struct type
*new_type
= alloc_type (cu
->objfile
);
13971 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
13972 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
13973 TYPE_VARARGS (to_type
));
13974 type
= lookup_methodptr_type (new_type
);
13977 type
= lookup_memberptr_type (to_type
, domain
);
13979 return set_die_type (die
, type
, cu
);
13982 /* Extract all information from a DW_TAG_reference_type DIE and add to
13983 the user defined type vector. */
13985 static struct type
*
13986 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13988 struct comp_unit_head
*cu_header
= &cu
->header
;
13989 struct type
*type
, *target_type
;
13990 struct attribute
*attr
;
13992 target_type
= die_type (die
, cu
);
13994 /* The die_type call above may have already set the type for this DIE. */
13995 type
= get_die_type (die
, cu
);
13999 type
= lookup_reference_type (target_type
);
14000 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14003 TYPE_LENGTH (type
) = DW_UNSND (attr
);
14007 TYPE_LENGTH (type
) = cu_header
->addr_size
;
14009 return set_die_type (die
, type
, cu
);
14012 static struct type
*
14013 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14015 struct type
*base_type
, *cv_type
;
14017 base_type
= die_type (die
, cu
);
14019 /* The die_type call above may have already set the type for this DIE. */
14020 cv_type
= get_die_type (die
, cu
);
14024 /* In case the const qualifier is applied to an array type, the element type
14025 is so qualified, not the array type (section 6.7.3 of C99). */
14026 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14028 struct type
*el_type
, *inner_array
;
14030 base_type
= copy_type (base_type
);
14031 inner_array
= base_type
;
14033 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
14035 TYPE_TARGET_TYPE (inner_array
) =
14036 copy_type (TYPE_TARGET_TYPE (inner_array
));
14037 inner_array
= TYPE_TARGET_TYPE (inner_array
);
14040 el_type
= TYPE_TARGET_TYPE (inner_array
);
14041 TYPE_TARGET_TYPE (inner_array
) =
14042 make_cv_type (1, TYPE_VOLATILE (el_type
), el_type
, NULL
);
14044 return set_die_type (die
, base_type
, cu
);
14047 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
14048 return set_die_type (die
, cv_type
, cu
);
14051 static struct type
*
14052 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14054 struct type
*base_type
, *cv_type
;
14056 base_type
= die_type (die
, cu
);
14058 /* The die_type call above may have already set the type for this DIE. */
14059 cv_type
= get_die_type (die
, cu
);
14063 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
14064 return set_die_type (die
, cv_type
, cu
);
14067 /* Handle DW_TAG_restrict_type. */
14069 static struct type
*
14070 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14072 struct type
*base_type
, *cv_type
;
14074 base_type
= die_type (die
, cu
);
14076 /* The die_type call above may have already set the type for this DIE. */
14077 cv_type
= get_die_type (die
, cu
);
14081 cv_type
= make_restrict_type (base_type
);
14082 return set_die_type (die
, cv_type
, cu
);
14085 /* Extract all information from a DW_TAG_string_type DIE and add to
14086 the user defined type vector. It isn't really a user defined type,
14087 but it behaves like one, with other DIE's using an AT_user_def_type
14088 attribute to reference it. */
14090 static struct type
*
14091 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14093 struct objfile
*objfile
= cu
->objfile
;
14094 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14095 struct type
*type
, *range_type
, *index_type
, *char_type
;
14096 struct attribute
*attr
;
14097 unsigned int length
;
14099 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
14102 length
= DW_UNSND (attr
);
14106 /* Check for the DW_AT_byte_size attribute. */
14107 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14110 length
= DW_UNSND (attr
);
14118 index_type
= objfile_type (objfile
)->builtin_int
;
14119 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
14120 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
14121 type
= create_string_type (NULL
, char_type
, range_type
);
14123 return set_die_type (die
, type
, cu
);
14126 /* Assuming that DIE corresponds to a function, returns nonzero
14127 if the function is prototyped. */
14130 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
14132 struct attribute
*attr
;
14134 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
14135 if (attr
&& (DW_UNSND (attr
) != 0))
14138 /* The DWARF standard implies that the DW_AT_prototyped attribute
14139 is only meaninful for C, but the concept also extends to other
14140 languages that allow unprototyped functions (Eg: Objective C).
14141 For all other languages, assume that functions are always
14143 if (cu
->language
!= language_c
14144 && cu
->language
!= language_objc
14145 && cu
->language
!= language_opencl
)
14148 /* RealView does not emit DW_AT_prototyped. We can not distinguish
14149 prototyped and unprototyped functions; default to prototyped,
14150 since that is more common in modern code (and RealView warns
14151 about unprototyped functions). */
14152 if (producer_is_realview (cu
->producer
))
14158 /* Handle DIES due to C code like:
14162 int (*funcp)(int a, long l);
14166 ('funcp' generates a DW_TAG_subroutine_type DIE). */
14168 static struct type
*
14169 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14171 struct objfile
*objfile
= cu
->objfile
;
14172 struct type
*type
; /* Type that this function returns. */
14173 struct type
*ftype
; /* Function that returns above type. */
14174 struct attribute
*attr
;
14176 type
= die_type (die
, cu
);
14178 /* The die_type call above may have already set the type for this DIE. */
14179 ftype
= get_die_type (die
, cu
);
14183 ftype
= lookup_function_type (type
);
14185 if (prototyped_function_p (die
, cu
))
14186 TYPE_PROTOTYPED (ftype
) = 1;
14188 /* Store the calling convention in the type if it's available in
14189 the subroutine die. Otherwise set the calling convention to
14190 the default value DW_CC_normal. */
14191 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
14193 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
14194 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
14195 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
14197 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
14199 /* We need to add the subroutine type to the die immediately so
14200 we don't infinitely recurse when dealing with parameters
14201 declared as the same subroutine type. */
14202 set_die_type (die
, ftype
, cu
);
14204 if (die
->child
!= NULL
)
14206 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
14207 struct die_info
*child_die
;
14208 int nparams
, iparams
;
14210 /* Count the number of parameters.
14211 FIXME: GDB currently ignores vararg functions, but knows about
14212 vararg member functions. */
14214 child_die
= die
->child
;
14215 while (child_die
&& child_die
->tag
)
14217 if (child_die
->tag
== DW_TAG_formal_parameter
)
14219 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
14220 TYPE_VARARGS (ftype
) = 1;
14221 child_die
= sibling_die (child_die
);
14224 /* Allocate storage for parameters and fill them in. */
14225 TYPE_NFIELDS (ftype
) = nparams
;
14226 TYPE_FIELDS (ftype
) = (struct field
*)
14227 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
14229 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
14230 even if we error out during the parameters reading below. */
14231 for (iparams
= 0; iparams
< nparams
; iparams
++)
14232 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
14235 child_die
= die
->child
;
14236 while (child_die
&& child_die
->tag
)
14238 if (child_die
->tag
== DW_TAG_formal_parameter
)
14240 struct type
*arg_type
;
14242 /* DWARF version 2 has no clean way to discern C++
14243 static and non-static member functions. G++ helps
14244 GDB by marking the first parameter for non-static
14245 member functions (which is the this pointer) as
14246 artificial. We pass this information to
14247 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
14249 DWARF version 3 added DW_AT_object_pointer, which GCC
14250 4.5 does not yet generate. */
14251 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
14253 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
14256 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
14258 /* GCC/43521: In java, the formal parameter
14259 "this" is sometimes not marked with DW_AT_artificial. */
14260 if (cu
->language
== language_java
)
14262 const char *name
= dwarf2_name (child_die
, cu
);
14264 if (name
&& !strcmp (name
, "this"))
14265 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
14268 arg_type
= die_type (child_die
, cu
);
14270 /* RealView does not mark THIS as const, which the testsuite
14271 expects. GCC marks THIS as const in method definitions,
14272 but not in the class specifications (GCC PR 43053). */
14273 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
14274 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
14277 struct dwarf2_cu
*arg_cu
= cu
;
14278 const char *name
= dwarf2_name (child_die
, cu
);
14280 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
14283 /* If the compiler emits this, use it. */
14284 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
14287 else if (name
&& strcmp (name
, "this") == 0)
14288 /* Function definitions will have the argument names. */
14290 else if (name
== NULL
&& iparams
== 0)
14291 /* Declarations may not have the names, so like
14292 elsewhere in GDB, assume an artificial first
14293 argument is "this". */
14297 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
14301 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
14304 child_die
= sibling_die (child_die
);
14311 static struct type
*
14312 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
14314 struct objfile
*objfile
= cu
->objfile
;
14315 const char *name
= NULL
;
14316 struct type
*this_type
, *target_type
;
14318 name
= dwarf2_full_name (NULL
, die
, cu
);
14319 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
14320 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
14321 TYPE_NAME (this_type
) = name
;
14322 set_die_type (die
, this_type
, cu
);
14323 target_type
= die_type (die
, cu
);
14324 if (target_type
!= this_type
)
14325 TYPE_TARGET_TYPE (this_type
) = target_type
;
14328 /* Self-referential typedefs are, it seems, not allowed by the DWARF
14329 spec and cause infinite loops in GDB. */
14330 complaint (&symfile_complaints
,
14331 _("Self-referential DW_TAG_typedef "
14332 "- DIE at 0x%x [in module %s]"),
14333 die
->offset
.sect_off
, objfile_name (objfile
));
14334 TYPE_TARGET_TYPE (this_type
) = NULL
;
14339 /* Find a representation of a given base type and install
14340 it in the TYPE field of the die. */
14342 static struct type
*
14343 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14345 struct objfile
*objfile
= cu
->objfile
;
14347 struct attribute
*attr
;
14348 int encoding
= 0, size
= 0;
14350 enum type_code code
= TYPE_CODE_INT
;
14351 int type_flags
= 0;
14352 struct type
*target_type
= NULL
;
14354 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
14357 encoding
= DW_UNSND (attr
);
14359 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14362 size
= DW_UNSND (attr
);
14364 name
= dwarf2_name (die
, cu
);
14367 complaint (&symfile_complaints
,
14368 _("DW_AT_name missing from DW_TAG_base_type"));
14373 case DW_ATE_address
:
14374 /* Turn DW_ATE_address into a void * pointer. */
14375 code
= TYPE_CODE_PTR
;
14376 type_flags
|= TYPE_FLAG_UNSIGNED
;
14377 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
14379 case DW_ATE_boolean
:
14380 code
= TYPE_CODE_BOOL
;
14381 type_flags
|= TYPE_FLAG_UNSIGNED
;
14383 case DW_ATE_complex_float
:
14384 code
= TYPE_CODE_COMPLEX
;
14385 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
14387 case DW_ATE_decimal_float
:
14388 code
= TYPE_CODE_DECFLOAT
;
14391 code
= TYPE_CODE_FLT
;
14393 case DW_ATE_signed
:
14395 case DW_ATE_unsigned
:
14396 type_flags
|= TYPE_FLAG_UNSIGNED
;
14397 if (cu
->language
== language_fortran
14399 && strncmp (name
, "character(", sizeof ("character(") - 1) == 0)
14400 code
= TYPE_CODE_CHAR
;
14402 case DW_ATE_signed_char
:
14403 if (cu
->language
== language_ada
|| cu
->language
== language_m2
14404 || cu
->language
== language_pascal
14405 || cu
->language
== language_fortran
)
14406 code
= TYPE_CODE_CHAR
;
14408 case DW_ATE_unsigned_char
:
14409 if (cu
->language
== language_ada
|| cu
->language
== language_m2
14410 || cu
->language
== language_pascal
14411 || cu
->language
== language_fortran
)
14412 code
= TYPE_CODE_CHAR
;
14413 type_flags
|= TYPE_FLAG_UNSIGNED
;
14416 /* We just treat this as an integer and then recognize the
14417 type by name elsewhere. */
14421 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
14422 dwarf_type_encoding_name (encoding
));
14426 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
14427 TYPE_NAME (type
) = name
;
14428 TYPE_TARGET_TYPE (type
) = target_type
;
14430 if (name
&& strcmp (name
, "char") == 0)
14431 TYPE_NOSIGN (type
) = 1;
14433 return set_die_type (die
, type
, cu
);
14436 /* Parse dwarf attribute if it's a block, reference or constant and put the
14437 resulting value of the attribute into struct bound_prop.
14438 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
14441 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
14442 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
)
14444 struct dwarf2_property_baton
*baton
;
14445 struct obstack
*obstack
= &cu
->objfile
->objfile_obstack
;
14447 if (attr
== NULL
|| prop
== NULL
)
14450 if (attr_form_is_block (attr
))
14452 baton
= obstack_alloc (obstack
, sizeof (*baton
));
14453 baton
->referenced_type
= NULL
;
14454 baton
->locexpr
.per_cu
= cu
->per_cu
;
14455 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
14456 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
14457 prop
->data
.baton
= baton
;
14458 prop
->kind
= PROP_LOCEXPR
;
14459 gdb_assert (prop
->data
.baton
!= NULL
);
14461 else if (attr_form_is_ref (attr
))
14463 struct dwarf2_cu
*target_cu
= cu
;
14464 struct die_info
*target_die
;
14465 struct attribute
*target_attr
;
14467 target_die
= follow_die_ref (die
, attr
, &target_cu
);
14468 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
14469 if (target_attr
== NULL
)
14472 if (attr_form_is_section_offset (target_attr
))
14474 baton
= obstack_alloc (obstack
, sizeof (*baton
));
14475 baton
->referenced_type
= die_type (target_die
, target_cu
);
14476 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
14477 prop
->data
.baton
= baton
;
14478 prop
->kind
= PROP_LOCLIST
;
14479 gdb_assert (prop
->data
.baton
!= NULL
);
14481 else if (attr_form_is_block (target_attr
))
14483 baton
= obstack_alloc (obstack
, sizeof (*baton
));
14484 baton
->referenced_type
= die_type (target_die
, target_cu
);
14485 baton
->locexpr
.per_cu
= cu
->per_cu
;
14486 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
14487 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
14488 prop
->data
.baton
= baton
;
14489 prop
->kind
= PROP_LOCEXPR
;
14490 gdb_assert (prop
->data
.baton
!= NULL
);
14494 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
14495 "dynamic property");
14499 else if (attr_form_is_constant (attr
))
14501 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
14502 prop
->kind
= PROP_CONST
;
14506 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
14507 dwarf2_name (die
, cu
));
14514 /* Read the given DW_AT_subrange DIE. */
14516 static struct type
*
14517 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14519 struct type
*base_type
, *orig_base_type
;
14520 struct type
*range_type
;
14521 struct attribute
*attr
;
14522 struct dynamic_prop low
, high
;
14523 int low_default_is_valid
;
14524 int high_bound_is_count
= 0;
14526 LONGEST negative_mask
;
14528 orig_base_type
= die_type (die
, cu
);
14529 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
14530 whereas the real type might be. So, we use ORIG_BASE_TYPE when
14531 creating the range type, but we use the result of check_typedef
14532 when examining properties of the type. */
14533 base_type
= check_typedef (orig_base_type
);
14535 /* The die_type call above may have already set the type for this DIE. */
14536 range_type
= get_die_type (die
, cu
);
14540 low
.kind
= PROP_CONST
;
14541 high
.kind
= PROP_CONST
;
14542 high
.data
.const_val
= 0;
14544 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
14545 omitting DW_AT_lower_bound. */
14546 switch (cu
->language
)
14549 case language_cplus
:
14550 low
.data
.const_val
= 0;
14551 low_default_is_valid
= 1;
14553 case language_fortran
:
14554 low
.data
.const_val
= 1;
14555 low_default_is_valid
= 1;
14558 case language_java
:
14559 case language_objc
:
14560 low
.data
.const_val
= 0;
14561 low_default_is_valid
= (cu
->header
.version
>= 4);
14565 case language_pascal
:
14566 low
.data
.const_val
= 1;
14567 low_default_is_valid
= (cu
->header
.version
>= 4);
14570 low
.data
.const_val
= 0;
14571 low_default_is_valid
= 0;
14575 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
14577 attr_to_dynamic_prop (attr
, die
, cu
, &low
);
14578 else if (!low_default_is_valid
)
14579 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
14580 "- DIE at 0x%x [in module %s]"),
14581 die
->offset
.sect_off
, objfile_name (cu
->objfile
));
14583 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
14584 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
))
14586 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
14587 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
))
14589 /* If bounds are constant do the final calculation here. */
14590 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
14591 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
14593 high_bound_is_count
= 1;
14597 /* Dwarf-2 specifications explicitly allows to create subrange types
14598 without specifying a base type.
14599 In that case, the base type must be set to the type of
14600 the lower bound, upper bound or count, in that order, if any of these
14601 three attributes references an object that has a type.
14602 If no base type is found, the Dwarf-2 specifications say that
14603 a signed integer type of size equal to the size of an address should
14605 For the following C code: `extern char gdb_int [];'
14606 GCC produces an empty range DIE.
14607 FIXME: muller/2010-05-28: Possible references to object for low bound,
14608 high bound or count are not yet handled by this code. */
14609 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
14611 struct objfile
*objfile
= cu
->objfile
;
14612 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14613 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
14614 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
14616 /* Test "int", "long int", and "long long int" objfile types,
14617 and select the first one having a size above or equal to the
14618 architecture address size. */
14619 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
14620 base_type
= int_type
;
14623 int_type
= objfile_type (objfile
)->builtin_long
;
14624 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
14625 base_type
= int_type
;
14628 int_type
= objfile_type (objfile
)->builtin_long_long
;
14629 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
14630 base_type
= int_type
;
14635 /* Normally, the DWARF producers are expected to use a signed
14636 constant form (Eg. DW_FORM_sdata) to express negative bounds.
14637 But this is unfortunately not always the case, as witnessed
14638 with GCC, for instance, where the ambiguous DW_FORM_dataN form
14639 is used instead. To work around that ambiguity, we treat
14640 the bounds as signed, and thus sign-extend their values, when
14641 the base type is signed. */
14643 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
14644 if (low
.kind
== PROP_CONST
14645 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
14646 low
.data
.const_val
|= negative_mask
;
14647 if (high
.kind
== PROP_CONST
14648 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
14649 high
.data
.const_val
|= negative_mask
;
14651 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
);
14653 if (high_bound_is_count
)
14654 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
14656 /* Ada expects an empty array on no boundary attributes. */
14657 if (attr
== NULL
&& cu
->language
!= language_ada
)
14658 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
14660 name
= dwarf2_name (die
, cu
);
14662 TYPE_NAME (range_type
) = name
;
14664 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14666 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
14668 set_die_type (die
, range_type
, cu
);
14670 /* set_die_type should be already done. */
14671 set_descriptive_type (range_type
, die
, cu
);
14676 static struct type
*
14677 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14681 /* For now, we only support the C meaning of an unspecified type: void. */
14683 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
14684 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
14686 return set_die_type (die
, type
, cu
);
14689 /* Read a single die and all its descendents. Set the die's sibling
14690 field to NULL; set other fields in the die correctly, and set all
14691 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
14692 location of the info_ptr after reading all of those dies. PARENT
14693 is the parent of the die in question. */
14695 static struct die_info
*
14696 read_die_and_children (const struct die_reader_specs
*reader
,
14697 const gdb_byte
*info_ptr
,
14698 const gdb_byte
**new_info_ptr
,
14699 struct die_info
*parent
)
14701 struct die_info
*die
;
14702 const gdb_byte
*cur_ptr
;
14705 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
14708 *new_info_ptr
= cur_ptr
;
14711 store_in_ref_table (die
, reader
->cu
);
14714 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
14718 *new_info_ptr
= cur_ptr
;
14721 die
->sibling
= NULL
;
14722 die
->parent
= parent
;
14726 /* Read a die, all of its descendents, and all of its siblings; set
14727 all of the fields of all of the dies correctly. Arguments are as
14728 in read_die_and_children. */
14730 static struct die_info
*
14731 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
14732 const gdb_byte
*info_ptr
,
14733 const gdb_byte
**new_info_ptr
,
14734 struct die_info
*parent
)
14736 struct die_info
*first_die
, *last_sibling
;
14737 const gdb_byte
*cur_ptr
;
14739 cur_ptr
= info_ptr
;
14740 first_die
= last_sibling
= NULL
;
14744 struct die_info
*die
14745 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
14749 *new_info_ptr
= cur_ptr
;
14756 last_sibling
->sibling
= die
;
14758 last_sibling
= die
;
14762 /* Read a die, all of its descendents, and all of its siblings; set
14763 all of the fields of all of the dies correctly. Arguments are as
14764 in read_die_and_children.
14765 This the main entry point for reading a DIE and all its children. */
14767 static struct die_info
*
14768 read_die_and_siblings (const struct die_reader_specs
*reader
,
14769 const gdb_byte
*info_ptr
,
14770 const gdb_byte
**new_info_ptr
,
14771 struct die_info
*parent
)
14773 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
14774 new_info_ptr
, parent
);
14776 if (dwarf2_die_debug
)
14778 fprintf_unfiltered (gdb_stdlog
,
14779 "Read die from %s@0x%x of %s:\n",
14780 get_section_name (reader
->die_section
),
14781 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
14782 bfd_get_filename (reader
->abfd
));
14783 dump_die (die
, dwarf2_die_debug
);
14789 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
14791 The caller is responsible for filling in the extra attributes
14792 and updating (*DIEP)->num_attrs.
14793 Set DIEP to point to a newly allocated die with its information,
14794 except for its child, sibling, and parent fields.
14795 Set HAS_CHILDREN to tell whether the die has children or not. */
14797 static const gdb_byte
*
14798 read_full_die_1 (const struct die_reader_specs
*reader
,
14799 struct die_info
**diep
, const gdb_byte
*info_ptr
,
14800 int *has_children
, int num_extra_attrs
)
14802 unsigned int abbrev_number
, bytes_read
, i
;
14803 sect_offset offset
;
14804 struct abbrev_info
*abbrev
;
14805 struct die_info
*die
;
14806 struct dwarf2_cu
*cu
= reader
->cu
;
14807 bfd
*abfd
= reader
->abfd
;
14809 offset
.sect_off
= info_ptr
- reader
->buffer
;
14810 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
14811 info_ptr
+= bytes_read
;
14812 if (!abbrev_number
)
14819 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
14821 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
14823 bfd_get_filename (abfd
));
14825 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
14826 die
->offset
= offset
;
14827 die
->tag
= abbrev
->tag
;
14828 die
->abbrev
= abbrev_number
;
14830 /* Make the result usable.
14831 The caller needs to update num_attrs after adding the extra
14833 die
->num_attrs
= abbrev
->num_attrs
;
14835 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
14836 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
14840 *has_children
= abbrev
->has_children
;
14844 /* Read a die and all its attributes.
14845 Set DIEP to point to a newly allocated die with its information,
14846 except for its child, sibling, and parent fields.
14847 Set HAS_CHILDREN to tell whether the die has children or not. */
14849 static const gdb_byte
*
14850 read_full_die (const struct die_reader_specs
*reader
,
14851 struct die_info
**diep
, const gdb_byte
*info_ptr
,
14854 const gdb_byte
*result
;
14856 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
14858 if (dwarf2_die_debug
)
14860 fprintf_unfiltered (gdb_stdlog
,
14861 "Read die from %s@0x%x of %s:\n",
14862 get_section_name (reader
->die_section
),
14863 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
14864 bfd_get_filename (reader
->abfd
));
14865 dump_die (*diep
, dwarf2_die_debug
);
14871 /* Abbreviation tables.
14873 In DWARF version 2, the description of the debugging information is
14874 stored in a separate .debug_abbrev section. Before we read any
14875 dies from a section we read in all abbreviations and install them
14876 in a hash table. */
14878 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
14880 static struct abbrev_info
*
14881 abbrev_table_alloc_abbrev (struct abbrev_table
*abbrev_table
)
14883 struct abbrev_info
*abbrev
;
14885 abbrev
= (struct abbrev_info
*)
14886 obstack_alloc (&abbrev_table
->abbrev_obstack
, sizeof (struct abbrev_info
));
14887 memset (abbrev
, 0, sizeof (struct abbrev_info
));
14891 /* Add an abbreviation to the table. */
14894 abbrev_table_add_abbrev (struct abbrev_table
*abbrev_table
,
14895 unsigned int abbrev_number
,
14896 struct abbrev_info
*abbrev
)
14898 unsigned int hash_number
;
14900 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
14901 abbrev
->next
= abbrev_table
->abbrevs
[hash_number
];
14902 abbrev_table
->abbrevs
[hash_number
] = abbrev
;
14905 /* Look up an abbrev in the table.
14906 Returns NULL if the abbrev is not found. */
14908 static struct abbrev_info
*
14909 abbrev_table_lookup_abbrev (const struct abbrev_table
*abbrev_table
,
14910 unsigned int abbrev_number
)
14912 unsigned int hash_number
;
14913 struct abbrev_info
*abbrev
;
14915 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
14916 abbrev
= abbrev_table
->abbrevs
[hash_number
];
14920 if (abbrev
->number
== abbrev_number
)
14922 abbrev
= abbrev
->next
;
14927 /* Read in an abbrev table. */
14929 static struct abbrev_table
*
14930 abbrev_table_read_table (struct dwarf2_section_info
*section
,
14931 sect_offset offset
)
14933 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14934 bfd
*abfd
= get_section_bfd_owner (section
);
14935 struct abbrev_table
*abbrev_table
;
14936 const gdb_byte
*abbrev_ptr
;
14937 struct abbrev_info
*cur_abbrev
;
14938 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
14939 unsigned int abbrev_form
;
14940 struct attr_abbrev
*cur_attrs
;
14941 unsigned int allocated_attrs
;
14943 abbrev_table
= XNEW (struct abbrev_table
);
14944 abbrev_table
->offset
= offset
;
14945 obstack_init (&abbrev_table
->abbrev_obstack
);
14946 abbrev_table
->abbrevs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
14948 * sizeof (struct abbrev_info
*)));
14949 memset (abbrev_table
->abbrevs
, 0,
14950 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
14952 dwarf2_read_section (objfile
, section
);
14953 abbrev_ptr
= section
->buffer
+ offset
.sect_off
;
14954 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
14955 abbrev_ptr
+= bytes_read
;
14957 allocated_attrs
= ATTR_ALLOC_CHUNK
;
14958 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
14960 /* Loop until we reach an abbrev number of 0. */
14961 while (abbrev_number
)
14963 cur_abbrev
= abbrev_table_alloc_abbrev (abbrev_table
);
14965 /* read in abbrev header */
14966 cur_abbrev
->number
= abbrev_number
;
14967 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
14968 abbrev_ptr
+= bytes_read
;
14969 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
14972 /* now read in declarations */
14973 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
14974 abbrev_ptr
+= bytes_read
;
14975 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
14976 abbrev_ptr
+= bytes_read
;
14977 while (abbrev_name
)
14979 if (cur_abbrev
->num_attrs
== allocated_attrs
)
14981 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
14983 = xrealloc (cur_attrs
, (allocated_attrs
14984 * sizeof (struct attr_abbrev
)));
14987 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
14988 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
14989 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
14990 abbrev_ptr
+= bytes_read
;
14991 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
14992 abbrev_ptr
+= bytes_read
;
14995 cur_abbrev
->attrs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
14996 (cur_abbrev
->num_attrs
14997 * sizeof (struct attr_abbrev
)));
14998 memcpy (cur_abbrev
->attrs
, cur_attrs
,
14999 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
15001 abbrev_table_add_abbrev (abbrev_table
, abbrev_number
, cur_abbrev
);
15003 /* Get next abbreviation.
15004 Under Irix6 the abbreviations for a compilation unit are not
15005 always properly terminated with an abbrev number of 0.
15006 Exit loop if we encounter an abbreviation which we have
15007 already read (which means we are about to read the abbreviations
15008 for the next compile unit) or if the end of the abbreviation
15009 table is reached. */
15010 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
15012 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15013 abbrev_ptr
+= bytes_read
;
15014 if (abbrev_table_lookup_abbrev (abbrev_table
, abbrev_number
) != NULL
)
15019 return abbrev_table
;
15022 /* Free the resources held by ABBREV_TABLE. */
15025 abbrev_table_free (struct abbrev_table
*abbrev_table
)
15027 obstack_free (&abbrev_table
->abbrev_obstack
, NULL
);
15028 xfree (abbrev_table
);
15031 /* Same as abbrev_table_free but as a cleanup.
15032 We pass in a pointer to the pointer to the table so that we can
15033 set the pointer to NULL when we're done. It also simplifies
15034 build_type_unit_groups. */
15037 abbrev_table_free_cleanup (void *table_ptr
)
15039 struct abbrev_table
**abbrev_table_ptr
= table_ptr
;
15041 if (*abbrev_table_ptr
!= NULL
)
15042 abbrev_table_free (*abbrev_table_ptr
);
15043 *abbrev_table_ptr
= NULL
;
15046 /* Read the abbrev table for CU from ABBREV_SECTION. */
15049 dwarf2_read_abbrevs (struct dwarf2_cu
*cu
,
15050 struct dwarf2_section_info
*abbrev_section
)
15053 abbrev_table_read_table (abbrev_section
, cu
->header
.abbrev_offset
);
15056 /* Release the memory used by the abbrev table for a compilation unit. */
15059 dwarf2_free_abbrev_table (void *ptr_to_cu
)
15061 struct dwarf2_cu
*cu
= ptr_to_cu
;
15063 if (cu
->abbrev_table
!= NULL
)
15064 abbrev_table_free (cu
->abbrev_table
);
15065 /* Set this to NULL so that we SEGV if we try to read it later,
15066 and also because free_comp_unit verifies this is NULL. */
15067 cu
->abbrev_table
= NULL
;
15070 /* Returns nonzero if TAG represents a type that we might generate a partial
15074 is_type_tag_for_partial (int tag
)
15079 /* Some types that would be reasonable to generate partial symbols for,
15080 that we don't at present. */
15081 case DW_TAG_array_type
:
15082 case DW_TAG_file_type
:
15083 case DW_TAG_ptr_to_member_type
:
15084 case DW_TAG_set_type
:
15085 case DW_TAG_string_type
:
15086 case DW_TAG_subroutine_type
:
15088 case DW_TAG_base_type
:
15089 case DW_TAG_class_type
:
15090 case DW_TAG_interface_type
:
15091 case DW_TAG_enumeration_type
:
15092 case DW_TAG_structure_type
:
15093 case DW_TAG_subrange_type
:
15094 case DW_TAG_typedef
:
15095 case DW_TAG_union_type
:
15102 /* Load all DIEs that are interesting for partial symbols into memory. */
15104 static struct partial_die_info
*
15105 load_partial_dies (const struct die_reader_specs
*reader
,
15106 const gdb_byte
*info_ptr
, int building_psymtab
)
15108 struct dwarf2_cu
*cu
= reader
->cu
;
15109 struct objfile
*objfile
= cu
->objfile
;
15110 struct partial_die_info
*part_die
;
15111 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
15112 struct abbrev_info
*abbrev
;
15113 unsigned int bytes_read
;
15114 unsigned int load_all
= 0;
15115 int nesting_level
= 1;
15120 gdb_assert (cu
->per_cu
!= NULL
);
15121 if (cu
->per_cu
->load_all_dies
)
15125 = htab_create_alloc_ex (cu
->header
.length
/ 12,
15129 &cu
->comp_unit_obstack
,
15130 hashtab_obstack_allocate
,
15131 dummy_obstack_deallocate
);
15133 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
15134 sizeof (struct partial_die_info
));
15138 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
15140 /* A NULL abbrev means the end of a series of children. */
15141 if (abbrev
== NULL
)
15143 if (--nesting_level
== 0)
15145 /* PART_DIE was probably the last thing allocated on the
15146 comp_unit_obstack, so we could call obstack_free
15147 here. We don't do that because the waste is small,
15148 and will be cleaned up when we're done with this
15149 compilation unit. This way, we're also more robust
15150 against other users of the comp_unit_obstack. */
15153 info_ptr
+= bytes_read
;
15154 last_die
= parent_die
;
15155 parent_die
= parent_die
->die_parent
;
15159 /* Check for template arguments. We never save these; if
15160 they're seen, we just mark the parent, and go on our way. */
15161 if (parent_die
!= NULL
15162 && cu
->language
== language_cplus
15163 && (abbrev
->tag
== DW_TAG_template_type_param
15164 || abbrev
->tag
== DW_TAG_template_value_param
))
15166 parent_die
->has_template_arguments
= 1;
15170 /* We don't need a partial DIE for the template argument. */
15171 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15176 /* We only recurse into c++ subprograms looking for template arguments.
15177 Skip their other children. */
15179 && cu
->language
== language_cplus
15180 && parent_die
!= NULL
15181 && parent_die
->tag
== DW_TAG_subprogram
)
15183 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15187 /* Check whether this DIE is interesting enough to save. Normally
15188 we would not be interested in members here, but there may be
15189 later variables referencing them via DW_AT_specification (for
15190 static members). */
15192 && !is_type_tag_for_partial (abbrev
->tag
)
15193 && abbrev
->tag
!= DW_TAG_constant
15194 && abbrev
->tag
!= DW_TAG_enumerator
15195 && abbrev
->tag
!= DW_TAG_subprogram
15196 && abbrev
->tag
!= DW_TAG_lexical_block
15197 && abbrev
->tag
!= DW_TAG_variable
15198 && abbrev
->tag
!= DW_TAG_namespace
15199 && abbrev
->tag
!= DW_TAG_module
15200 && abbrev
->tag
!= DW_TAG_member
15201 && abbrev
->tag
!= DW_TAG_imported_unit
15202 && abbrev
->tag
!= DW_TAG_imported_declaration
)
15204 /* Otherwise we skip to the next sibling, if any. */
15205 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15209 info_ptr
= read_partial_die (reader
, part_die
, abbrev
, bytes_read
,
15212 /* This two-pass algorithm for processing partial symbols has a
15213 high cost in cache pressure. Thus, handle some simple cases
15214 here which cover the majority of C partial symbols. DIEs
15215 which neither have specification tags in them, nor could have
15216 specification tags elsewhere pointing at them, can simply be
15217 processed and discarded.
15219 This segment is also optional; scan_partial_symbols and
15220 add_partial_symbol will handle these DIEs if we chain
15221 them in normally. When compilers which do not emit large
15222 quantities of duplicate debug information are more common,
15223 this code can probably be removed. */
15225 /* Any complete simple types at the top level (pretty much all
15226 of them, for a language without namespaces), can be processed
15228 if (parent_die
== NULL
15229 && part_die
->has_specification
== 0
15230 && part_die
->is_declaration
== 0
15231 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
15232 || part_die
->tag
== DW_TAG_base_type
15233 || part_die
->tag
== DW_TAG_subrange_type
))
15235 if (building_psymtab
&& part_die
->name
!= NULL
)
15236 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
15237 VAR_DOMAIN
, LOC_TYPEDEF
,
15238 &objfile
->static_psymbols
,
15239 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
15240 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
15244 /* The exception for DW_TAG_typedef with has_children above is
15245 a workaround of GCC PR debug/47510. In the case of this complaint
15246 type_name_no_tag_or_error will error on such types later.
15248 GDB skipped children of DW_TAG_typedef by the shortcut above and then
15249 it could not find the child DIEs referenced later, this is checked
15250 above. In correct DWARF DW_TAG_typedef should have no children. */
15252 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
15253 complaint (&symfile_complaints
,
15254 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
15255 "- DIE at 0x%x [in module %s]"),
15256 part_die
->offset
.sect_off
, objfile_name (objfile
));
15258 /* If we're at the second level, and we're an enumerator, and
15259 our parent has no specification (meaning possibly lives in a
15260 namespace elsewhere), then we can add the partial symbol now
15261 instead of queueing it. */
15262 if (part_die
->tag
== DW_TAG_enumerator
15263 && parent_die
!= NULL
15264 && parent_die
->die_parent
== NULL
15265 && parent_die
->tag
== DW_TAG_enumeration_type
15266 && parent_die
->has_specification
== 0)
15268 if (part_die
->name
== NULL
)
15269 complaint (&symfile_complaints
,
15270 _("malformed enumerator DIE ignored"));
15271 else if (building_psymtab
)
15272 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
15273 VAR_DOMAIN
, LOC_CONST
,
15274 (cu
->language
== language_cplus
15275 || cu
->language
== language_java
)
15276 ? &objfile
->global_psymbols
15277 : &objfile
->static_psymbols
,
15278 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
15280 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
15284 /* We'll save this DIE so link it in. */
15285 part_die
->die_parent
= parent_die
;
15286 part_die
->die_sibling
= NULL
;
15287 part_die
->die_child
= NULL
;
15289 if (last_die
&& last_die
== parent_die
)
15290 last_die
->die_child
= part_die
;
15292 last_die
->die_sibling
= part_die
;
15294 last_die
= part_die
;
15296 if (first_die
== NULL
)
15297 first_die
= part_die
;
15299 /* Maybe add the DIE to the hash table. Not all DIEs that we
15300 find interesting need to be in the hash table, because we
15301 also have the parent/sibling/child chains; only those that we
15302 might refer to by offset later during partial symbol reading.
15304 For now this means things that might have be the target of a
15305 DW_AT_specification, DW_AT_abstract_origin, or
15306 DW_AT_extension. DW_AT_extension will refer only to
15307 namespaces; DW_AT_abstract_origin refers to functions (and
15308 many things under the function DIE, but we do not recurse
15309 into function DIEs during partial symbol reading) and
15310 possibly variables as well; DW_AT_specification refers to
15311 declarations. Declarations ought to have the DW_AT_declaration
15312 flag. It happens that GCC forgets to put it in sometimes, but
15313 only for functions, not for types.
15315 Adding more things than necessary to the hash table is harmless
15316 except for the performance cost. Adding too few will result in
15317 wasted time in find_partial_die, when we reread the compilation
15318 unit with load_all_dies set. */
15321 || abbrev
->tag
== DW_TAG_constant
15322 || abbrev
->tag
== DW_TAG_subprogram
15323 || abbrev
->tag
== DW_TAG_variable
15324 || abbrev
->tag
== DW_TAG_namespace
15325 || part_die
->is_declaration
)
15329 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
15330 part_die
->offset
.sect_off
, INSERT
);
15334 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
15335 sizeof (struct partial_die_info
));
15337 /* For some DIEs we want to follow their children (if any). For C
15338 we have no reason to follow the children of structures; for other
15339 languages we have to, so that we can get at method physnames
15340 to infer fully qualified class names, for DW_AT_specification,
15341 and for C++ template arguments. For C++, we also look one level
15342 inside functions to find template arguments (if the name of the
15343 function does not already contain the template arguments).
15345 For Ada, we need to scan the children of subprograms and lexical
15346 blocks as well because Ada allows the definition of nested
15347 entities that could be interesting for the debugger, such as
15348 nested subprograms for instance. */
15349 if (last_die
->has_children
15351 || last_die
->tag
== DW_TAG_namespace
15352 || last_die
->tag
== DW_TAG_module
15353 || last_die
->tag
== DW_TAG_enumeration_type
15354 || (cu
->language
== language_cplus
15355 && last_die
->tag
== DW_TAG_subprogram
15356 && (last_die
->name
== NULL
15357 || strchr (last_die
->name
, '<') == NULL
))
15358 || (cu
->language
!= language_c
15359 && (last_die
->tag
== DW_TAG_class_type
15360 || last_die
->tag
== DW_TAG_interface_type
15361 || last_die
->tag
== DW_TAG_structure_type
15362 || last_die
->tag
== DW_TAG_union_type
))
15363 || (cu
->language
== language_ada
15364 && (last_die
->tag
== DW_TAG_subprogram
15365 || last_die
->tag
== DW_TAG_lexical_block
))))
15368 parent_die
= last_die
;
15372 /* Otherwise we skip to the next sibling, if any. */
15373 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
15375 /* Back to the top, do it again. */
15379 /* Read a minimal amount of information into the minimal die structure. */
15381 static const gdb_byte
*
15382 read_partial_die (const struct die_reader_specs
*reader
,
15383 struct partial_die_info
*part_die
,
15384 struct abbrev_info
*abbrev
, unsigned int abbrev_len
,
15385 const gdb_byte
*info_ptr
)
15387 struct dwarf2_cu
*cu
= reader
->cu
;
15388 struct objfile
*objfile
= cu
->objfile
;
15389 const gdb_byte
*buffer
= reader
->buffer
;
15391 struct attribute attr
;
15392 int has_low_pc_attr
= 0;
15393 int has_high_pc_attr
= 0;
15394 int high_pc_relative
= 0;
15396 memset (part_die
, 0, sizeof (struct partial_die_info
));
15398 part_die
->offset
.sect_off
= info_ptr
- buffer
;
15400 info_ptr
+= abbrev_len
;
15402 if (abbrev
== NULL
)
15405 part_die
->tag
= abbrev
->tag
;
15406 part_die
->has_children
= abbrev
->has_children
;
15408 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
15410 info_ptr
= read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
15412 /* Store the data if it is of an attribute we want to keep in a
15413 partial symbol table. */
15417 switch (part_die
->tag
)
15419 case DW_TAG_compile_unit
:
15420 case DW_TAG_partial_unit
:
15421 case DW_TAG_type_unit
:
15422 /* Compilation units have a DW_AT_name that is a filename, not
15423 a source language identifier. */
15424 case DW_TAG_enumeration_type
:
15425 case DW_TAG_enumerator
:
15426 /* These tags always have simple identifiers already; no need
15427 to canonicalize them. */
15428 part_die
->name
= DW_STRING (&attr
);
15432 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
15433 &objfile
->objfile_obstack
);
15437 case DW_AT_linkage_name
:
15438 case DW_AT_MIPS_linkage_name
:
15439 /* Note that both forms of linkage name might appear. We
15440 assume they will be the same, and we only store the last
15442 if (cu
->language
== language_ada
)
15443 part_die
->name
= DW_STRING (&attr
);
15444 part_die
->linkage_name
= DW_STRING (&attr
);
15447 has_low_pc_attr
= 1;
15448 part_die
->lowpc
= attr_value_as_address (&attr
);
15450 case DW_AT_high_pc
:
15451 has_high_pc_attr
= 1;
15452 part_die
->highpc
= attr_value_as_address (&attr
);
15453 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
15454 high_pc_relative
= 1;
15456 case DW_AT_location
:
15457 /* Support the .debug_loc offsets. */
15458 if (attr_form_is_block (&attr
))
15460 part_die
->d
.locdesc
= DW_BLOCK (&attr
);
15462 else if (attr_form_is_section_offset (&attr
))
15464 dwarf2_complex_location_expr_complaint ();
15468 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
15469 "partial symbol information");
15472 case DW_AT_external
:
15473 part_die
->is_external
= DW_UNSND (&attr
);
15475 case DW_AT_declaration
:
15476 part_die
->is_declaration
= DW_UNSND (&attr
);
15479 part_die
->has_type
= 1;
15481 case DW_AT_abstract_origin
:
15482 case DW_AT_specification
:
15483 case DW_AT_extension
:
15484 part_die
->has_specification
= 1;
15485 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
15486 part_die
->spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
15487 || cu
->per_cu
->is_dwz
);
15489 case DW_AT_sibling
:
15490 /* Ignore absolute siblings, they might point outside of
15491 the current compile unit. */
15492 if (attr
.form
== DW_FORM_ref_addr
)
15493 complaint (&symfile_complaints
,
15494 _("ignoring absolute DW_AT_sibling"));
15497 unsigned int off
= dwarf2_get_ref_die_offset (&attr
).sect_off
;
15498 const gdb_byte
*sibling_ptr
= buffer
+ off
;
15500 if (sibling_ptr
< info_ptr
)
15501 complaint (&symfile_complaints
,
15502 _("DW_AT_sibling points backwards"));
15503 else if (sibling_ptr
> reader
->buffer_end
)
15504 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
15506 part_die
->sibling
= sibling_ptr
;
15509 case DW_AT_byte_size
:
15510 part_die
->has_byte_size
= 1;
15512 case DW_AT_calling_convention
:
15513 /* DWARF doesn't provide a way to identify a program's source-level
15514 entry point. DW_AT_calling_convention attributes are only meant
15515 to describe functions' calling conventions.
15517 However, because it's a necessary piece of information in
15518 Fortran, and because DW_CC_program is the only piece of debugging
15519 information whose definition refers to a 'main program' at all,
15520 several compilers have begun marking Fortran main programs with
15521 DW_CC_program --- even when those functions use the standard
15522 calling conventions.
15524 So until DWARF specifies a way to provide this information and
15525 compilers pick up the new representation, we'll support this
15527 if (DW_UNSND (&attr
) == DW_CC_program
15528 && cu
->language
== language_fortran
)
15529 set_objfile_main_name (objfile
, part_die
->name
, language_fortran
);
15532 if (DW_UNSND (&attr
) == DW_INL_inlined
15533 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
15534 part_die
->may_be_inlined
= 1;
15538 if (part_die
->tag
== DW_TAG_imported_unit
)
15540 part_die
->d
.offset
= dwarf2_get_ref_die_offset (&attr
);
15541 part_die
->is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
15542 || cu
->per_cu
->is_dwz
);
15551 if (high_pc_relative
)
15552 part_die
->highpc
+= part_die
->lowpc
;
15554 if (has_low_pc_attr
&& has_high_pc_attr
)
15556 /* When using the GNU linker, .gnu.linkonce. sections are used to
15557 eliminate duplicate copies of functions and vtables and such.
15558 The linker will arbitrarily choose one and discard the others.
15559 The AT_*_pc values for such functions refer to local labels in
15560 these sections. If the section from that file was discarded, the
15561 labels are not in the output, so the relocs get a value of 0.
15562 If this is a discarded function, mark the pc bounds as invalid,
15563 so that GDB will ignore it. */
15564 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
15566 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15568 complaint (&symfile_complaints
,
15569 _("DW_AT_low_pc %s is zero "
15570 "for DIE at 0x%x [in module %s]"),
15571 paddress (gdbarch
, part_die
->lowpc
),
15572 part_die
->offset
.sect_off
, objfile_name (objfile
));
15574 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
15575 else if (part_die
->lowpc
>= part_die
->highpc
)
15577 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15579 complaint (&symfile_complaints
,
15580 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
15581 "for DIE at 0x%x [in module %s]"),
15582 paddress (gdbarch
, part_die
->lowpc
),
15583 paddress (gdbarch
, part_die
->highpc
),
15584 part_die
->offset
.sect_off
, objfile_name (objfile
));
15587 part_die
->has_pc_info
= 1;
15593 /* Find a cached partial DIE at OFFSET in CU. */
15595 static struct partial_die_info
*
15596 find_partial_die_in_comp_unit (sect_offset offset
, struct dwarf2_cu
*cu
)
15598 struct partial_die_info
*lookup_die
= NULL
;
15599 struct partial_die_info part_die
;
15601 part_die
.offset
= offset
;
15602 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
,
15608 /* Find a partial DIE at OFFSET, which may or may not be in CU,
15609 except in the case of .debug_types DIEs which do not reference
15610 outside their CU (they do however referencing other types via
15611 DW_FORM_ref_sig8). */
15613 static struct partial_die_info
*
15614 find_partial_die (sect_offset offset
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
15616 struct objfile
*objfile
= cu
->objfile
;
15617 struct dwarf2_per_cu_data
*per_cu
= NULL
;
15618 struct partial_die_info
*pd
= NULL
;
15620 if (offset_in_dwz
== cu
->per_cu
->is_dwz
15621 && offset_in_cu_p (&cu
->header
, offset
))
15623 pd
= find_partial_die_in_comp_unit (offset
, cu
);
15626 /* We missed recording what we needed.
15627 Load all dies and try again. */
15628 per_cu
= cu
->per_cu
;
15632 /* TUs don't reference other CUs/TUs (except via type signatures). */
15633 if (cu
->per_cu
->is_debug_types
)
15635 error (_("Dwarf Error: Type Unit at offset 0x%lx contains"
15636 " external reference to offset 0x%lx [in module %s].\n"),
15637 (long) cu
->header
.offset
.sect_off
, (long) offset
.sect_off
,
15638 bfd_get_filename (objfile
->obfd
));
15640 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
15643 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
15644 load_partial_comp_unit (per_cu
);
15646 per_cu
->cu
->last_used
= 0;
15647 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
15650 /* If we didn't find it, and not all dies have been loaded,
15651 load them all and try again. */
15653 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
15655 per_cu
->load_all_dies
= 1;
15657 /* This is nasty. When we reread the DIEs, somewhere up the call chain
15658 THIS_CU->cu may already be in use. So we can't just free it and
15659 replace its DIEs with the ones we read in. Instead, we leave those
15660 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
15661 and clobber THIS_CU->cu->partial_dies with the hash table for the new
15663 load_partial_comp_unit (per_cu
);
15665 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
15669 internal_error (__FILE__
, __LINE__
,
15670 _("could not find partial DIE 0x%x "
15671 "in cache [from module %s]\n"),
15672 offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
15676 /* See if we can figure out if the class lives in a namespace. We do
15677 this by looking for a member function; its demangled name will
15678 contain namespace info, if there is any. */
15681 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
15682 struct dwarf2_cu
*cu
)
15684 /* NOTE: carlton/2003-10-07: Getting the info this way changes
15685 what template types look like, because the demangler
15686 frequently doesn't give the same name as the debug info. We
15687 could fix this by only using the demangled name to get the
15688 prefix (but see comment in read_structure_type). */
15690 struct partial_die_info
*real_pdi
;
15691 struct partial_die_info
*child_pdi
;
15693 /* If this DIE (this DIE's specification, if any) has a parent, then
15694 we should not do this. We'll prepend the parent's fully qualified
15695 name when we create the partial symbol. */
15697 real_pdi
= struct_pdi
;
15698 while (real_pdi
->has_specification
)
15699 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
15700 real_pdi
->spec_is_dwz
, cu
);
15702 if (real_pdi
->die_parent
!= NULL
)
15705 for (child_pdi
= struct_pdi
->die_child
;
15707 child_pdi
= child_pdi
->die_sibling
)
15709 if (child_pdi
->tag
== DW_TAG_subprogram
15710 && child_pdi
->linkage_name
!= NULL
)
15712 char *actual_class_name
15713 = language_class_name_from_physname (cu
->language_defn
,
15714 child_pdi
->linkage_name
);
15715 if (actual_class_name
!= NULL
)
15718 = obstack_copy0 (&cu
->objfile
->objfile_obstack
,
15720 strlen (actual_class_name
));
15721 xfree (actual_class_name
);
15728 /* Adjust PART_DIE before generating a symbol for it. This function
15729 may set the is_external flag or change the DIE's name. */
15732 fixup_partial_die (struct partial_die_info
*part_die
,
15733 struct dwarf2_cu
*cu
)
15735 /* Once we've fixed up a die, there's no point in doing so again.
15736 This also avoids a memory leak if we were to call
15737 guess_partial_die_structure_name multiple times. */
15738 if (part_die
->fixup_called
)
15741 /* If we found a reference attribute and the DIE has no name, try
15742 to find a name in the referred to DIE. */
15744 if (part_die
->name
== NULL
&& part_die
->has_specification
)
15746 struct partial_die_info
*spec_die
;
15748 spec_die
= find_partial_die (part_die
->spec_offset
,
15749 part_die
->spec_is_dwz
, cu
);
15751 fixup_partial_die (spec_die
, cu
);
15753 if (spec_die
->name
)
15755 part_die
->name
= spec_die
->name
;
15757 /* Copy DW_AT_external attribute if it is set. */
15758 if (spec_die
->is_external
)
15759 part_die
->is_external
= spec_die
->is_external
;
15763 /* Set default names for some unnamed DIEs. */
15765 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
15766 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
15768 /* If there is no parent die to provide a namespace, and there are
15769 children, see if we can determine the namespace from their linkage
15771 if (cu
->language
== language_cplus
15772 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
15773 && part_die
->die_parent
== NULL
15774 && part_die
->has_children
15775 && (part_die
->tag
== DW_TAG_class_type
15776 || part_die
->tag
== DW_TAG_structure_type
15777 || part_die
->tag
== DW_TAG_union_type
))
15778 guess_partial_die_structure_name (part_die
, cu
);
15780 /* GCC might emit a nameless struct or union that has a linkage
15781 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
15782 if (part_die
->name
== NULL
15783 && (part_die
->tag
== DW_TAG_class_type
15784 || part_die
->tag
== DW_TAG_interface_type
15785 || part_die
->tag
== DW_TAG_structure_type
15786 || part_die
->tag
== DW_TAG_union_type
)
15787 && part_die
->linkage_name
!= NULL
)
15791 demangled
= gdb_demangle (part_die
->linkage_name
, DMGL_TYPES
);
15796 /* Strip any leading namespaces/classes, keep only the base name.
15797 DW_AT_name for named DIEs does not contain the prefixes. */
15798 base
= strrchr (demangled
, ':');
15799 if (base
&& base
> demangled
&& base
[-1] == ':')
15804 part_die
->name
= obstack_copy0 (&cu
->objfile
->objfile_obstack
,
15805 base
, strlen (base
));
15810 part_die
->fixup_called
= 1;
15813 /* Read an attribute value described by an attribute form. */
15815 static const gdb_byte
*
15816 read_attribute_value (const struct die_reader_specs
*reader
,
15817 struct attribute
*attr
, unsigned form
,
15818 const gdb_byte
*info_ptr
)
15820 struct dwarf2_cu
*cu
= reader
->cu
;
15821 bfd
*abfd
= reader
->abfd
;
15822 struct comp_unit_head
*cu_header
= &cu
->header
;
15823 unsigned int bytes_read
;
15824 struct dwarf_block
*blk
;
15829 case DW_FORM_ref_addr
:
15830 if (cu
->header
.version
== 2)
15831 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
15833 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
15834 &cu
->header
, &bytes_read
);
15835 info_ptr
+= bytes_read
;
15837 case DW_FORM_GNU_ref_alt
:
15838 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
15839 info_ptr
+= bytes_read
;
15842 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
15843 info_ptr
+= bytes_read
;
15845 case DW_FORM_block2
:
15846 blk
= dwarf_alloc_block (cu
);
15847 blk
->size
= read_2_bytes (abfd
, info_ptr
);
15849 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
15850 info_ptr
+= blk
->size
;
15851 DW_BLOCK (attr
) = blk
;
15853 case DW_FORM_block4
:
15854 blk
= dwarf_alloc_block (cu
);
15855 blk
->size
= read_4_bytes (abfd
, info_ptr
);
15857 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
15858 info_ptr
+= blk
->size
;
15859 DW_BLOCK (attr
) = blk
;
15861 case DW_FORM_data2
:
15862 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
15865 case DW_FORM_data4
:
15866 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
15869 case DW_FORM_data8
:
15870 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
15873 case DW_FORM_sec_offset
:
15874 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
15875 info_ptr
+= bytes_read
;
15877 case DW_FORM_string
:
15878 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
15879 DW_STRING_IS_CANONICAL (attr
) = 0;
15880 info_ptr
+= bytes_read
;
15883 if (!cu
->per_cu
->is_dwz
)
15885 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
15887 DW_STRING_IS_CANONICAL (attr
) = 0;
15888 info_ptr
+= bytes_read
;
15892 case DW_FORM_GNU_strp_alt
:
15894 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
15895 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
15898 DW_STRING (attr
) = read_indirect_string_from_dwz (dwz
, str_offset
);
15899 DW_STRING_IS_CANONICAL (attr
) = 0;
15900 info_ptr
+= bytes_read
;
15903 case DW_FORM_exprloc
:
15904 case DW_FORM_block
:
15905 blk
= dwarf_alloc_block (cu
);
15906 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
15907 info_ptr
+= bytes_read
;
15908 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
15909 info_ptr
+= blk
->size
;
15910 DW_BLOCK (attr
) = blk
;
15912 case DW_FORM_block1
:
15913 blk
= dwarf_alloc_block (cu
);
15914 blk
->size
= read_1_byte (abfd
, info_ptr
);
15916 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
15917 info_ptr
+= blk
->size
;
15918 DW_BLOCK (attr
) = blk
;
15920 case DW_FORM_data1
:
15921 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
15925 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
15928 case DW_FORM_flag_present
:
15929 DW_UNSND (attr
) = 1;
15931 case DW_FORM_sdata
:
15932 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
15933 info_ptr
+= bytes_read
;
15935 case DW_FORM_udata
:
15936 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
15937 info_ptr
+= bytes_read
;
15940 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
15941 + read_1_byte (abfd
, info_ptr
));
15945 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
15946 + read_2_bytes (abfd
, info_ptr
));
15950 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
15951 + read_4_bytes (abfd
, info_ptr
));
15955 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
15956 + read_8_bytes (abfd
, info_ptr
));
15959 case DW_FORM_ref_sig8
:
15960 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
15963 case DW_FORM_ref_udata
:
15964 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
15965 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
15966 info_ptr
+= bytes_read
;
15968 case DW_FORM_indirect
:
15969 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
15970 info_ptr
+= bytes_read
;
15971 info_ptr
= read_attribute_value (reader
, attr
, form
, info_ptr
);
15973 case DW_FORM_GNU_addr_index
:
15974 if (reader
->dwo_file
== NULL
)
15976 /* For now flag a hard error.
15977 Later we can turn this into a complaint. */
15978 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
15979 dwarf_form_name (form
),
15980 bfd_get_filename (abfd
));
15982 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
15983 info_ptr
+= bytes_read
;
15985 case DW_FORM_GNU_str_index
:
15986 if (reader
->dwo_file
== NULL
)
15988 /* For now flag a hard error.
15989 Later we can turn this into a complaint if warranted. */
15990 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
15991 dwarf_form_name (form
),
15992 bfd_get_filename (abfd
));
15995 ULONGEST str_index
=
15996 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
15998 DW_STRING (attr
) = read_str_index (reader
, str_index
);
15999 DW_STRING_IS_CANONICAL (attr
) = 0;
16000 info_ptr
+= bytes_read
;
16004 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
16005 dwarf_form_name (form
),
16006 bfd_get_filename (abfd
));
16010 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
16011 attr
->form
= DW_FORM_GNU_ref_alt
;
16013 /* We have seen instances where the compiler tried to emit a byte
16014 size attribute of -1 which ended up being encoded as an unsigned
16015 0xffffffff. Although 0xffffffff is technically a valid size value,
16016 an object of this size seems pretty unlikely so we can relatively
16017 safely treat these cases as if the size attribute was invalid and
16018 treat them as zero by default. */
16019 if (attr
->name
== DW_AT_byte_size
16020 && form
== DW_FORM_data4
16021 && DW_UNSND (attr
) >= 0xffffffff)
16024 (&symfile_complaints
,
16025 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
16026 hex_string (DW_UNSND (attr
)));
16027 DW_UNSND (attr
) = 0;
16033 /* Read an attribute described by an abbreviated attribute. */
16035 static const gdb_byte
*
16036 read_attribute (const struct die_reader_specs
*reader
,
16037 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
16038 const gdb_byte
*info_ptr
)
16040 attr
->name
= abbrev
->name
;
16041 return read_attribute_value (reader
, attr
, abbrev
->form
, info_ptr
);
16044 /* Read dwarf information from a buffer. */
16046 static unsigned int
16047 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
16049 return bfd_get_8 (abfd
, buf
);
16053 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
16055 return bfd_get_signed_8 (abfd
, buf
);
16058 static unsigned int
16059 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16061 return bfd_get_16 (abfd
, buf
);
16065 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16067 return bfd_get_signed_16 (abfd
, buf
);
16070 static unsigned int
16071 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16073 return bfd_get_32 (abfd
, buf
);
16077 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16079 return bfd_get_signed_32 (abfd
, buf
);
16083 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16085 return bfd_get_64 (abfd
, buf
);
16089 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
16090 unsigned int *bytes_read
)
16092 struct comp_unit_head
*cu_header
= &cu
->header
;
16093 CORE_ADDR retval
= 0;
16095 if (cu_header
->signed_addr_p
)
16097 switch (cu_header
->addr_size
)
16100 retval
= bfd_get_signed_16 (abfd
, buf
);
16103 retval
= bfd_get_signed_32 (abfd
, buf
);
16106 retval
= bfd_get_signed_64 (abfd
, buf
);
16109 internal_error (__FILE__
, __LINE__
,
16110 _("read_address: bad switch, signed [in module %s]"),
16111 bfd_get_filename (abfd
));
16116 switch (cu_header
->addr_size
)
16119 retval
= bfd_get_16 (abfd
, buf
);
16122 retval
= bfd_get_32 (abfd
, buf
);
16125 retval
= bfd_get_64 (abfd
, buf
);
16128 internal_error (__FILE__
, __LINE__
,
16129 _("read_address: bad switch, "
16130 "unsigned [in module %s]"),
16131 bfd_get_filename (abfd
));
16135 *bytes_read
= cu_header
->addr_size
;
16139 /* Read the initial length from a section. The (draft) DWARF 3
16140 specification allows the initial length to take up either 4 bytes
16141 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
16142 bytes describe the length and all offsets will be 8 bytes in length
16145 An older, non-standard 64-bit format is also handled by this
16146 function. The older format in question stores the initial length
16147 as an 8-byte quantity without an escape value. Lengths greater
16148 than 2^32 aren't very common which means that the initial 4 bytes
16149 is almost always zero. Since a length value of zero doesn't make
16150 sense for the 32-bit format, this initial zero can be considered to
16151 be an escape value which indicates the presence of the older 64-bit
16152 format. As written, the code can't detect (old format) lengths
16153 greater than 4GB. If it becomes necessary to handle lengths
16154 somewhat larger than 4GB, we could allow other small values (such
16155 as the non-sensical values of 1, 2, and 3) to also be used as
16156 escape values indicating the presence of the old format.
16158 The value returned via bytes_read should be used to increment the
16159 relevant pointer after calling read_initial_length().
16161 [ Note: read_initial_length() and read_offset() are based on the
16162 document entitled "DWARF Debugging Information Format", revision
16163 3, draft 8, dated November 19, 2001. This document was obtained
16166 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
16168 This document is only a draft and is subject to change. (So beware.)
16170 Details regarding the older, non-standard 64-bit format were
16171 determined empirically by examining 64-bit ELF files produced by
16172 the SGI toolchain on an IRIX 6.5 machine.
16174 - Kevin, July 16, 2002
16178 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
16180 LONGEST length
= bfd_get_32 (abfd
, buf
);
16182 if (length
== 0xffffffff)
16184 length
= bfd_get_64 (abfd
, buf
+ 4);
16187 else if (length
== 0)
16189 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
16190 length
= bfd_get_64 (abfd
, buf
);
16201 /* Cover function for read_initial_length.
16202 Returns the length of the object at BUF, and stores the size of the
16203 initial length in *BYTES_READ and stores the size that offsets will be in
16205 If the initial length size is not equivalent to that specified in
16206 CU_HEADER then issue a complaint.
16207 This is useful when reading non-comp-unit headers. */
16210 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
16211 const struct comp_unit_head
*cu_header
,
16212 unsigned int *bytes_read
,
16213 unsigned int *offset_size
)
16215 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
16217 gdb_assert (cu_header
->initial_length_size
== 4
16218 || cu_header
->initial_length_size
== 8
16219 || cu_header
->initial_length_size
== 12);
16221 if (cu_header
->initial_length_size
!= *bytes_read
)
16222 complaint (&symfile_complaints
,
16223 _("intermixed 32-bit and 64-bit DWARF sections"));
16225 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
16229 /* Read an offset from the data stream. The size of the offset is
16230 given by cu_header->offset_size. */
16233 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
16234 const struct comp_unit_head
*cu_header
,
16235 unsigned int *bytes_read
)
16237 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
16239 *bytes_read
= cu_header
->offset_size
;
16243 /* Read an offset from the data stream. */
16246 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
16248 LONGEST retval
= 0;
16250 switch (offset_size
)
16253 retval
= bfd_get_32 (abfd
, buf
);
16256 retval
= bfd_get_64 (abfd
, buf
);
16259 internal_error (__FILE__
, __LINE__
,
16260 _("read_offset_1: bad switch [in module %s]"),
16261 bfd_get_filename (abfd
));
16267 static const gdb_byte
*
16268 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
16270 /* If the size of a host char is 8 bits, we can return a pointer
16271 to the buffer, otherwise we have to copy the data to a buffer
16272 allocated on the temporary obstack. */
16273 gdb_assert (HOST_CHAR_BIT
== 8);
16277 static const char *
16278 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
16279 unsigned int *bytes_read_ptr
)
16281 /* If the size of a host char is 8 bits, we can return a pointer
16282 to the string, otherwise we have to copy the string to a buffer
16283 allocated on the temporary obstack. */
16284 gdb_assert (HOST_CHAR_BIT
== 8);
16287 *bytes_read_ptr
= 1;
16290 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
16291 return (const char *) buf
;
16294 static const char *
16295 read_indirect_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
16297 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
16298 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
16299 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
16300 bfd_get_filename (abfd
));
16301 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
16302 error (_("DW_FORM_strp pointing outside of "
16303 ".debug_str section [in module %s]"),
16304 bfd_get_filename (abfd
));
16305 gdb_assert (HOST_CHAR_BIT
== 8);
16306 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
16308 return (const char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
16311 /* Read a string at offset STR_OFFSET in the .debug_str section from
16312 the .dwz file DWZ. Throw an error if the offset is too large. If
16313 the string consists of a single NUL byte, return NULL; otherwise
16314 return a pointer to the string. */
16316 static const char *
16317 read_indirect_string_from_dwz (struct dwz_file
*dwz
, LONGEST str_offset
)
16319 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwz
->str
);
16321 if (dwz
->str
.buffer
== NULL
)
16322 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
16323 "section [in module %s]"),
16324 bfd_get_filename (dwz
->dwz_bfd
));
16325 if (str_offset
>= dwz
->str
.size
)
16326 error (_("DW_FORM_GNU_strp_alt pointing outside of "
16327 ".debug_str section [in module %s]"),
16328 bfd_get_filename (dwz
->dwz_bfd
));
16329 gdb_assert (HOST_CHAR_BIT
== 8);
16330 if (dwz
->str
.buffer
[str_offset
] == '\0')
16332 return (const char *) (dwz
->str
.buffer
+ str_offset
);
16335 static const char *
16336 read_indirect_string (bfd
*abfd
, const gdb_byte
*buf
,
16337 const struct comp_unit_head
*cu_header
,
16338 unsigned int *bytes_read_ptr
)
16340 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
16342 return read_indirect_string_at_offset (abfd
, str_offset
);
16346 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
16347 unsigned int *bytes_read_ptr
)
16350 unsigned int num_read
;
16352 unsigned char byte
;
16360 byte
= bfd_get_8 (abfd
, buf
);
16363 result
|= ((ULONGEST
) (byte
& 127) << shift
);
16364 if ((byte
& 128) == 0)
16370 *bytes_read_ptr
= num_read
;
16375 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
16376 unsigned int *bytes_read_ptr
)
16379 int i
, shift
, num_read
;
16380 unsigned char byte
;
16388 byte
= bfd_get_8 (abfd
, buf
);
16391 result
|= ((LONGEST
) (byte
& 127) << shift
);
16393 if ((byte
& 128) == 0)
16398 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
16399 result
|= -(((LONGEST
) 1) << shift
);
16400 *bytes_read_ptr
= num_read
;
16404 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
16405 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
16406 ADDR_SIZE is the size of addresses from the CU header. */
16409 read_addr_index_1 (unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
16411 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16412 bfd
*abfd
= objfile
->obfd
;
16413 const gdb_byte
*info_ptr
;
16415 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
16416 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
16417 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
16418 objfile_name (objfile
));
16419 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
16420 error (_("DW_FORM_addr_index pointing outside of "
16421 ".debug_addr section [in module %s]"),
16422 objfile_name (objfile
));
16423 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
16424 + addr_base
+ addr_index
* addr_size
);
16425 if (addr_size
== 4)
16426 return bfd_get_32 (abfd
, info_ptr
);
16428 return bfd_get_64 (abfd
, info_ptr
);
16431 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
16434 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
16436 return read_addr_index_1 (addr_index
, cu
->addr_base
, cu
->header
.addr_size
);
16439 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
16442 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
16443 unsigned int *bytes_read
)
16445 bfd
*abfd
= cu
->objfile
->obfd
;
16446 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
16448 return read_addr_index (cu
, addr_index
);
16451 /* Data structure to pass results from dwarf2_read_addr_index_reader
16452 back to dwarf2_read_addr_index. */
16454 struct dwarf2_read_addr_index_data
16456 ULONGEST addr_base
;
16460 /* die_reader_func for dwarf2_read_addr_index. */
16463 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
16464 const gdb_byte
*info_ptr
,
16465 struct die_info
*comp_unit_die
,
16469 struct dwarf2_cu
*cu
= reader
->cu
;
16470 struct dwarf2_read_addr_index_data
*aidata
=
16471 (struct dwarf2_read_addr_index_data
*) data
;
16473 aidata
->addr_base
= cu
->addr_base
;
16474 aidata
->addr_size
= cu
->header
.addr_size
;
16477 /* Given an index in .debug_addr, fetch the value.
16478 NOTE: This can be called during dwarf expression evaluation,
16479 long after the debug information has been read, and thus per_cu->cu
16480 may no longer exist. */
16483 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
16484 unsigned int addr_index
)
16486 struct objfile
*objfile
= per_cu
->objfile
;
16487 struct dwarf2_cu
*cu
= per_cu
->cu
;
16488 ULONGEST addr_base
;
16491 /* This is intended to be called from outside this file. */
16492 dw2_setup (objfile
);
16494 /* We need addr_base and addr_size.
16495 If we don't have PER_CU->cu, we have to get it.
16496 Nasty, but the alternative is storing the needed info in PER_CU,
16497 which at this point doesn't seem justified: it's not clear how frequently
16498 it would get used and it would increase the size of every PER_CU.
16499 Entry points like dwarf2_per_cu_addr_size do a similar thing
16500 so we're not in uncharted territory here.
16501 Alas we need to be a bit more complicated as addr_base is contained
16504 We don't need to read the entire CU(/TU).
16505 We just need the header and top level die.
16507 IWBN to use the aging mechanism to let us lazily later discard the CU.
16508 For now we skip this optimization. */
16512 addr_base
= cu
->addr_base
;
16513 addr_size
= cu
->header
.addr_size
;
16517 struct dwarf2_read_addr_index_data aidata
;
16519 /* Note: We can't use init_cutu_and_read_dies_simple here,
16520 we need addr_base. */
16521 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
16522 dwarf2_read_addr_index_reader
, &aidata
);
16523 addr_base
= aidata
.addr_base
;
16524 addr_size
= aidata
.addr_size
;
16527 return read_addr_index_1 (addr_index
, addr_base
, addr_size
);
16530 /* Given a DW_FORM_GNU_str_index, fetch the string.
16531 This is only used by the Fission support. */
16533 static const char *
16534 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
16536 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16537 const char *objf_name
= objfile_name (objfile
);
16538 bfd
*abfd
= objfile
->obfd
;
16539 struct dwarf2_cu
*cu
= reader
->cu
;
16540 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
16541 struct dwarf2_section_info
*str_offsets_section
=
16542 &reader
->dwo_file
->sections
.str_offsets
;
16543 const gdb_byte
*info_ptr
;
16544 ULONGEST str_offset
;
16545 static const char form_name
[] = "DW_FORM_GNU_str_index";
16547 dwarf2_read_section (objfile
, str_section
);
16548 dwarf2_read_section (objfile
, str_offsets_section
);
16549 if (str_section
->buffer
== NULL
)
16550 error (_("%s used without .debug_str.dwo section"
16551 " in CU at offset 0x%lx [in module %s]"),
16552 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16553 if (str_offsets_section
->buffer
== NULL
)
16554 error (_("%s used without .debug_str_offsets.dwo section"
16555 " in CU at offset 0x%lx [in module %s]"),
16556 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16557 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
16558 error (_("%s pointing outside of .debug_str_offsets.dwo"
16559 " section in CU at offset 0x%lx [in module %s]"),
16560 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16561 info_ptr
= (str_offsets_section
->buffer
16562 + str_index
* cu
->header
.offset_size
);
16563 if (cu
->header
.offset_size
== 4)
16564 str_offset
= bfd_get_32 (abfd
, info_ptr
);
16566 str_offset
= bfd_get_64 (abfd
, info_ptr
);
16567 if (str_offset
>= str_section
->size
)
16568 error (_("Offset from %s pointing outside of"
16569 " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"),
16570 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16571 return (const char *) (str_section
->buffer
+ str_offset
);
16574 /* Return the length of an LEB128 number in BUF. */
16577 leb128_size (const gdb_byte
*buf
)
16579 const gdb_byte
*begin
= buf
;
16585 if ((byte
& 128) == 0)
16586 return buf
- begin
;
16591 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
16599 cu
->language
= language_c
;
16601 case DW_LANG_C_plus_plus
:
16602 cu
->language
= language_cplus
;
16605 cu
->language
= language_d
;
16607 case DW_LANG_Fortran77
:
16608 case DW_LANG_Fortran90
:
16609 case DW_LANG_Fortran95
:
16610 cu
->language
= language_fortran
;
16613 cu
->language
= language_go
;
16615 case DW_LANG_Mips_Assembler
:
16616 cu
->language
= language_asm
;
16619 cu
->language
= language_java
;
16621 case DW_LANG_Ada83
:
16622 case DW_LANG_Ada95
:
16623 cu
->language
= language_ada
;
16625 case DW_LANG_Modula2
:
16626 cu
->language
= language_m2
;
16628 case DW_LANG_Pascal83
:
16629 cu
->language
= language_pascal
;
16632 cu
->language
= language_objc
;
16634 case DW_LANG_Cobol74
:
16635 case DW_LANG_Cobol85
:
16637 cu
->language
= language_minimal
;
16640 cu
->language_defn
= language_def (cu
->language
);
16643 /* Return the named attribute or NULL if not there. */
16645 static struct attribute
*
16646 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
16651 struct attribute
*spec
= NULL
;
16653 for (i
= 0; i
< die
->num_attrs
; ++i
)
16655 if (die
->attrs
[i
].name
== name
)
16656 return &die
->attrs
[i
];
16657 if (die
->attrs
[i
].name
== DW_AT_specification
16658 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
16659 spec
= &die
->attrs
[i
];
16665 die
= follow_die_ref (die
, spec
, &cu
);
16671 /* Return the named attribute or NULL if not there,
16672 but do not follow DW_AT_specification, etc.
16673 This is for use in contexts where we're reading .debug_types dies.
16674 Following DW_AT_specification, DW_AT_abstract_origin will take us
16675 back up the chain, and we want to go down. */
16677 static struct attribute
*
16678 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
16682 for (i
= 0; i
< die
->num_attrs
; ++i
)
16683 if (die
->attrs
[i
].name
== name
)
16684 return &die
->attrs
[i
];
16689 /* Return non-zero iff the attribute NAME is defined for the given DIE,
16690 and holds a non-zero value. This function should only be used for
16691 DW_FORM_flag or DW_FORM_flag_present attributes. */
16694 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
16696 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
16698 return (attr
&& DW_UNSND (attr
));
16702 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
16704 /* A DIE is a declaration if it has a DW_AT_declaration attribute
16705 which value is non-zero. However, we have to be careful with
16706 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
16707 (via dwarf2_flag_true_p) follows this attribute. So we may
16708 end up accidently finding a declaration attribute that belongs
16709 to a different DIE referenced by the specification attribute,
16710 even though the given DIE does not have a declaration attribute. */
16711 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
16712 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
16715 /* Return the die giving the specification for DIE, if there is
16716 one. *SPEC_CU is the CU containing DIE on input, and the CU
16717 containing the return value on output. If there is no
16718 specification, but there is an abstract origin, that is
16721 static struct die_info
*
16722 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
16724 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
16727 if (spec_attr
== NULL
)
16728 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
16730 if (spec_attr
== NULL
)
16733 return follow_die_ref (die
, spec_attr
, spec_cu
);
16736 /* Free the line_header structure *LH, and any arrays and strings it
16738 NOTE: This is also used as a "cleanup" function. */
16741 free_line_header (struct line_header
*lh
)
16743 if (lh
->standard_opcode_lengths
)
16744 xfree (lh
->standard_opcode_lengths
);
16746 /* Remember that all the lh->file_names[i].name pointers are
16747 pointers into debug_line_buffer, and don't need to be freed. */
16748 if (lh
->file_names
)
16749 xfree (lh
->file_names
);
16751 /* Similarly for the include directory names. */
16752 if (lh
->include_dirs
)
16753 xfree (lh
->include_dirs
);
16758 /* Add an entry to LH's include directory table. */
16761 add_include_dir (struct line_header
*lh
, const char *include_dir
)
16763 /* Grow the array if necessary. */
16764 if (lh
->include_dirs_size
== 0)
16766 lh
->include_dirs_size
= 1; /* for testing */
16767 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
16768 * sizeof (*lh
->include_dirs
));
16770 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
16772 lh
->include_dirs_size
*= 2;
16773 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
16774 (lh
->include_dirs_size
16775 * sizeof (*lh
->include_dirs
)));
16778 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
16781 /* Add an entry to LH's file name table. */
16784 add_file_name (struct line_header
*lh
,
16786 unsigned int dir_index
,
16787 unsigned int mod_time
,
16788 unsigned int length
)
16790 struct file_entry
*fe
;
16792 /* Grow the array if necessary. */
16793 if (lh
->file_names_size
== 0)
16795 lh
->file_names_size
= 1; /* for testing */
16796 lh
->file_names
= xmalloc (lh
->file_names_size
16797 * sizeof (*lh
->file_names
));
16799 else if (lh
->num_file_names
>= lh
->file_names_size
)
16801 lh
->file_names_size
*= 2;
16802 lh
->file_names
= xrealloc (lh
->file_names
,
16803 (lh
->file_names_size
16804 * sizeof (*lh
->file_names
)));
16807 fe
= &lh
->file_names
[lh
->num_file_names
++];
16809 fe
->dir_index
= dir_index
;
16810 fe
->mod_time
= mod_time
;
16811 fe
->length
= length
;
16812 fe
->included_p
= 0;
16816 /* A convenience function to find the proper .debug_line section for a
16819 static struct dwarf2_section_info
*
16820 get_debug_line_section (struct dwarf2_cu
*cu
)
16822 struct dwarf2_section_info
*section
;
16824 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
16826 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
16827 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
16828 else if (cu
->per_cu
->is_dwz
)
16830 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
16832 section
= &dwz
->line
;
16835 section
= &dwarf2_per_objfile
->line
;
16840 /* Read the statement program header starting at OFFSET in
16841 .debug_line, or .debug_line.dwo. Return a pointer
16842 to a struct line_header, allocated using xmalloc.
16844 NOTE: the strings in the include directory and file name tables of
16845 the returned object point into the dwarf line section buffer,
16846 and must not be freed. */
16848 static struct line_header
*
16849 dwarf_decode_line_header (unsigned int offset
, struct dwarf2_cu
*cu
)
16851 struct cleanup
*back_to
;
16852 struct line_header
*lh
;
16853 const gdb_byte
*line_ptr
;
16854 unsigned int bytes_read
, offset_size
;
16856 const char *cur_dir
, *cur_file
;
16857 struct dwarf2_section_info
*section
;
16860 section
= get_debug_line_section (cu
);
16861 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
16862 if (section
->buffer
== NULL
)
16864 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
16865 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
16867 complaint (&symfile_complaints
, _("missing .debug_line section"));
16871 /* We can't do this until we know the section is non-empty.
16872 Only then do we know we have such a section. */
16873 abfd
= get_section_bfd_owner (section
);
16875 /* Make sure that at least there's room for the total_length field.
16876 That could be 12 bytes long, but we're just going to fudge that. */
16877 if (offset
+ 4 >= section
->size
)
16879 dwarf2_statement_list_fits_in_line_number_section_complaint ();
16883 lh
= xmalloc (sizeof (*lh
));
16884 memset (lh
, 0, sizeof (*lh
));
16885 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
16888 line_ptr
= section
->buffer
+ offset
;
16890 /* Read in the header. */
16892 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
16893 &bytes_read
, &offset_size
);
16894 line_ptr
+= bytes_read
;
16895 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
16897 dwarf2_statement_list_fits_in_line_number_section_complaint ();
16898 do_cleanups (back_to
);
16901 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
16902 lh
->version
= read_2_bytes (abfd
, line_ptr
);
16904 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
16905 line_ptr
+= offset_size
;
16906 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
16908 if (lh
->version
>= 4)
16910 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
16914 lh
->maximum_ops_per_instruction
= 1;
16916 if (lh
->maximum_ops_per_instruction
== 0)
16918 lh
->maximum_ops_per_instruction
= 1;
16919 complaint (&symfile_complaints
,
16920 _("invalid maximum_ops_per_instruction "
16921 "in `.debug_line' section"));
16924 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
16926 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
16928 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
16930 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
16932 lh
->standard_opcode_lengths
16933 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
16935 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
16936 for (i
= 1; i
< lh
->opcode_base
; ++i
)
16938 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
16942 /* Read directory table. */
16943 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
16945 line_ptr
+= bytes_read
;
16946 add_include_dir (lh
, cur_dir
);
16948 line_ptr
+= bytes_read
;
16950 /* Read file name table. */
16951 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
16953 unsigned int dir_index
, mod_time
, length
;
16955 line_ptr
+= bytes_read
;
16956 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
16957 line_ptr
+= bytes_read
;
16958 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
16959 line_ptr
+= bytes_read
;
16960 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
16961 line_ptr
+= bytes_read
;
16963 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
16965 line_ptr
+= bytes_read
;
16966 lh
->statement_program_start
= line_ptr
;
16968 if (line_ptr
> (section
->buffer
+ section
->size
))
16969 complaint (&symfile_complaints
,
16970 _("line number info header doesn't "
16971 "fit in `.debug_line' section"));
16973 discard_cleanups (back_to
);
16977 /* Subroutine of dwarf_decode_lines to simplify it.
16978 Return the file name of the psymtab for included file FILE_INDEX
16979 in line header LH of PST.
16980 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
16981 If space for the result is malloc'd, it will be freed by a cleanup.
16982 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename.
16984 The function creates dangling cleanup registration. */
16986 static const char *
16987 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
16988 const struct partial_symtab
*pst
,
16989 const char *comp_dir
)
16991 const struct file_entry fe
= lh
->file_names
[file_index
];
16992 const char *include_name
= fe
.name
;
16993 const char *include_name_to_compare
= include_name
;
16994 const char *dir_name
= NULL
;
16995 const char *pst_filename
;
16996 char *copied_name
= NULL
;
17000 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
17002 if (!IS_ABSOLUTE_PATH (include_name
)
17003 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
17005 /* Avoid creating a duplicate psymtab for PST.
17006 We do this by comparing INCLUDE_NAME and PST_FILENAME.
17007 Before we do the comparison, however, we need to account
17008 for DIR_NAME and COMP_DIR.
17009 First prepend dir_name (if non-NULL). If we still don't
17010 have an absolute path prepend comp_dir (if non-NULL).
17011 However, the directory we record in the include-file's
17012 psymtab does not contain COMP_DIR (to match the
17013 corresponding symtab(s)).
17018 bash$ gcc -g ./hello.c
17019 include_name = "hello.c"
17021 DW_AT_comp_dir = comp_dir = "/tmp"
17022 DW_AT_name = "./hello.c" */
17024 if (dir_name
!= NULL
)
17026 char *tem
= concat (dir_name
, SLASH_STRING
,
17027 include_name
, (char *)NULL
);
17029 make_cleanup (xfree
, tem
);
17030 include_name
= tem
;
17031 include_name_to_compare
= include_name
;
17033 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
17035 char *tem
= concat (comp_dir
, SLASH_STRING
,
17036 include_name
, (char *)NULL
);
17038 make_cleanup (xfree
, tem
);
17039 include_name_to_compare
= tem
;
17043 pst_filename
= pst
->filename
;
17044 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
17046 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
17047 pst_filename
, (char *)NULL
);
17048 pst_filename
= copied_name
;
17051 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
17053 if (copied_name
!= NULL
)
17054 xfree (copied_name
);
17058 return include_name
;
17061 /* Ignore this record_line request. */
17064 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
17069 /* Subroutine of dwarf_decode_lines to simplify it.
17070 Process the line number information in LH. */
17073 dwarf_decode_lines_1 (struct line_header
*lh
, const char *comp_dir
,
17074 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
17076 const gdb_byte
*line_ptr
, *extended_end
;
17077 const gdb_byte
*line_end
;
17078 unsigned int bytes_read
, extended_len
;
17079 unsigned char op_code
, extended_op
, adj_opcode
;
17080 CORE_ADDR baseaddr
;
17081 struct objfile
*objfile
= cu
->objfile
;
17082 bfd
*abfd
= objfile
->obfd
;
17083 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17084 const int decode_for_pst_p
= (pst
!= NULL
);
17085 struct subfile
*last_subfile
= NULL
;
17086 void (*p_record_line
) (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
17089 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
17091 line_ptr
= lh
->statement_program_start
;
17092 line_end
= lh
->statement_program_end
;
17094 /* Read the statement sequences until there's nothing left. */
17095 while (line_ptr
< line_end
)
17097 /* state machine registers */
17098 CORE_ADDR address
= 0;
17099 unsigned int file
= 1;
17100 unsigned int line
= 1;
17101 unsigned int column
= 0;
17102 int is_stmt
= lh
->default_is_stmt
;
17103 int basic_block
= 0;
17104 int end_sequence
= 0;
17106 unsigned char op_index
= 0;
17108 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
17110 /* Start a subfile for the current file of the state machine. */
17111 /* lh->include_dirs and lh->file_names are 0-based, but the
17112 directory and file name numbers in the statement program
17114 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
17115 const char *dir
= NULL
;
17118 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17120 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
17123 /* Decode the table. */
17124 while (!end_sequence
)
17126 op_code
= read_1_byte (abfd
, line_ptr
);
17128 if (line_ptr
> line_end
)
17130 dwarf2_debug_line_missing_end_sequence_complaint ();
17134 if (op_code
>= lh
->opcode_base
)
17136 /* Special operand. */
17137 adj_opcode
= op_code
- lh
->opcode_base
;
17138 address
+= (((op_index
+ (adj_opcode
/ lh
->line_range
))
17139 / lh
->maximum_ops_per_instruction
)
17140 * lh
->minimum_instruction_length
);
17141 op_index
= ((op_index
+ (adj_opcode
/ lh
->line_range
))
17142 % lh
->maximum_ops_per_instruction
);
17143 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
17144 if (lh
->num_file_names
< file
|| file
== 0)
17145 dwarf2_debug_line_missing_file_complaint ();
17146 /* For now we ignore lines not starting on an
17147 instruction boundary. */
17148 else if (op_index
== 0)
17150 lh
->file_names
[file
- 1].included_p
= 1;
17151 if (!decode_for_pst_p
&& is_stmt
)
17153 if (last_subfile
!= current_subfile
)
17155 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
17157 (*p_record_line
) (last_subfile
, 0, addr
);
17158 last_subfile
= current_subfile
;
17160 /* Append row to matrix using current values. */
17161 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
17162 (*p_record_line
) (current_subfile
, line
, addr
);
17167 else switch (op_code
)
17169 case DW_LNS_extended_op
:
17170 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
17172 line_ptr
+= bytes_read
;
17173 extended_end
= line_ptr
+ extended_len
;
17174 extended_op
= read_1_byte (abfd
, line_ptr
);
17176 switch (extended_op
)
17178 case DW_LNE_end_sequence
:
17179 p_record_line
= record_line
;
17182 case DW_LNE_set_address
:
17183 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
17185 if (address
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
17187 /* This line table is for a function which has been
17188 GCd by the linker. Ignore it. PR gdb/12528 */
17191 = line_ptr
- get_debug_line_section (cu
)->buffer
;
17193 complaint (&symfile_complaints
,
17194 _(".debug_line address at offset 0x%lx is 0 "
17196 line_offset
, objfile_name (objfile
));
17197 p_record_line
= noop_record_line
;
17201 line_ptr
+= bytes_read
;
17202 address
+= baseaddr
;
17204 case DW_LNE_define_file
:
17206 const char *cur_file
;
17207 unsigned int dir_index
, mod_time
, length
;
17209 cur_file
= read_direct_string (abfd
, line_ptr
,
17211 line_ptr
+= bytes_read
;
17213 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17214 line_ptr
+= bytes_read
;
17216 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17217 line_ptr
+= bytes_read
;
17219 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17220 line_ptr
+= bytes_read
;
17221 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
17224 case DW_LNE_set_discriminator
:
17225 /* The discriminator is not interesting to the debugger;
17227 line_ptr
= extended_end
;
17230 complaint (&symfile_complaints
,
17231 _("mangled .debug_line section"));
17234 /* Make sure that we parsed the extended op correctly. If e.g.
17235 we expected a different address size than the producer used,
17236 we may have read the wrong number of bytes. */
17237 if (line_ptr
!= extended_end
)
17239 complaint (&symfile_complaints
,
17240 _("mangled .debug_line section"));
17245 if (lh
->num_file_names
< file
|| file
== 0)
17246 dwarf2_debug_line_missing_file_complaint ();
17249 lh
->file_names
[file
- 1].included_p
= 1;
17250 if (!decode_for_pst_p
&& is_stmt
)
17252 if (last_subfile
!= current_subfile
)
17254 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
17256 (*p_record_line
) (last_subfile
, 0, addr
);
17257 last_subfile
= current_subfile
;
17259 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
17260 (*p_record_line
) (current_subfile
, line
, addr
);
17265 case DW_LNS_advance_pc
:
17268 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17270 address
+= (((op_index
+ adjust
)
17271 / lh
->maximum_ops_per_instruction
)
17272 * lh
->minimum_instruction_length
);
17273 op_index
= ((op_index
+ adjust
)
17274 % lh
->maximum_ops_per_instruction
);
17275 line_ptr
+= bytes_read
;
17278 case DW_LNS_advance_line
:
17279 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
17280 line_ptr
+= bytes_read
;
17282 case DW_LNS_set_file
:
17284 /* The arrays lh->include_dirs and lh->file_names are
17285 0-based, but the directory and file name numbers in
17286 the statement program are 1-based. */
17287 struct file_entry
*fe
;
17288 const char *dir
= NULL
;
17290 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17291 line_ptr
+= bytes_read
;
17292 if (lh
->num_file_names
< file
|| file
== 0)
17293 dwarf2_debug_line_missing_file_complaint ();
17296 fe
= &lh
->file_names
[file
- 1];
17298 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17299 if (!decode_for_pst_p
)
17301 last_subfile
= current_subfile
;
17302 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
17307 case DW_LNS_set_column
:
17308 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17309 line_ptr
+= bytes_read
;
17311 case DW_LNS_negate_stmt
:
17312 is_stmt
= (!is_stmt
);
17314 case DW_LNS_set_basic_block
:
17317 /* Add to the address register of the state machine the
17318 address increment value corresponding to special opcode
17319 255. I.e., this value is scaled by the minimum
17320 instruction length since special opcode 255 would have
17321 scaled the increment. */
17322 case DW_LNS_const_add_pc
:
17324 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
17326 address
+= (((op_index
+ adjust
)
17327 / lh
->maximum_ops_per_instruction
)
17328 * lh
->minimum_instruction_length
);
17329 op_index
= ((op_index
+ adjust
)
17330 % lh
->maximum_ops_per_instruction
);
17333 case DW_LNS_fixed_advance_pc
:
17334 address
+= read_2_bytes (abfd
, line_ptr
);
17340 /* Unknown standard opcode, ignore it. */
17343 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
17345 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17346 line_ptr
+= bytes_read
;
17351 if (lh
->num_file_names
< file
|| file
== 0)
17352 dwarf2_debug_line_missing_file_complaint ();
17355 lh
->file_names
[file
- 1].included_p
= 1;
17356 if (!decode_for_pst_p
)
17358 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
17359 (*p_record_line
) (current_subfile
, 0, addr
);
17365 /* Decode the Line Number Program (LNP) for the given line_header
17366 structure and CU. The actual information extracted and the type
17367 of structures created from the LNP depends on the value of PST.
17369 1. If PST is NULL, then this procedure uses the data from the program
17370 to create all necessary symbol tables, and their linetables.
17372 2. If PST is not NULL, this procedure reads the program to determine
17373 the list of files included by the unit represented by PST, and
17374 builds all the associated partial symbol tables.
17376 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
17377 It is used for relative paths in the line table.
17378 NOTE: When processing partial symtabs (pst != NULL),
17379 comp_dir == pst->dirname.
17381 NOTE: It is important that psymtabs have the same file name (via strcmp)
17382 as the corresponding symtab. Since COMP_DIR is not used in the name of the
17383 symtab we don't use it in the name of the psymtabs we create.
17384 E.g. expand_line_sal requires this when finding psymtabs to expand.
17385 A good testcase for this is mb-inline.exp. */
17388 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
17389 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
17390 int want_line_info
)
17392 struct objfile
*objfile
= cu
->objfile
;
17393 const int decode_for_pst_p
= (pst
!= NULL
);
17394 struct subfile
*first_subfile
= current_subfile
;
17396 if (want_line_info
)
17397 dwarf_decode_lines_1 (lh
, comp_dir
, cu
, pst
);
17399 if (decode_for_pst_p
)
17403 /* Now that we're done scanning the Line Header Program, we can
17404 create the psymtab of each included file. */
17405 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
17406 if (lh
->file_names
[file_index
].included_p
== 1)
17408 const char *include_name
=
17409 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
17410 if (include_name
!= NULL
)
17411 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
17416 /* Make sure a symtab is created for every file, even files
17417 which contain only variables (i.e. no code with associated
17421 for (i
= 0; i
< lh
->num_file_names
; i
++)
17423 const char *dir
= NULL
;
17424 struct file_entry
*fe
;
17426 fe
= &lh
->file_names
[i
];
17428 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17429 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
17431 /* Skip the main file; we don't need it, and it must be
17432 allocated last, so that it will show up before the
17433 non-primary symtabs in the objfile's symtab list. */
17434 if (current_subfile
== first_subfile
)
17437 if (current_subfile
->symtab
== NULL
)
17438 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
17440 fe
->symtab
= current_subfile
->symtab
;
17445 /* Start a subfile for DWARF. FILENAME is the name of the file and
17446 DIRNAME the name of the source directory which contains FILENAME
17447 or NULL if not known. COMP_DIR is the compilation directory for the
17448 linetable's compilation unit or NULL if not known.
17449 This routine tries to keep line numbers from identical absolute and
17450 relative file names in a common subfile.
17452 Using the `list' example from the GDB testsuite, which resides in
17453 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
17454 of /srcdir/list0.c yields the following debugging information for list0.c:
17456 DW_AT_name: /srcdir/list0.c
17457 DW_AT_comp_dir: /compdir
17458 files.files[0].name: list0.h
17459 files.files[0].dir: /srcdir
17460 files.files[1].name: list0.c
17461 files.files[1].dir: /srcdir
17463 The line number information for list0.c has to end up in a single
17464 subfile, so that `break /srcdir/list0.c:1' works as expected.
17465 start_subfile will ensure that this happens provided that we pass the
17466 concatenation of files.files[1].dir and files.files[1].name as the
17470 dwarf2_start_subfile (const char *filename
, const char *dirname
,
17471 const char *comp_dir
)
17475 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
17476 `start_symtab' will always pass the contents of DW_AT_comp_dir as
17477 second argument to start_subfile. To be consistent, we do the
17478 same here. In order not to lose the line information directory,
17479 we concatenate it to the filename when it makes sense.
17480 Note that the Dwarf3 standard says (speaking of filenames in line
17481 information): ``The directory index is ignored for file names
17482 that represent full path names''. Thus ignoring dirname in the
17483 `else' branch below isn't an issue. */
17485 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
17487 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
17491 start_subfile (filename
, comp_dir
);
17497 /* Start a symtab for DWARF.
17498 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
17501 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
17502 const char *name
, const char *comp_dir
, CORE_ADDR low_pc
)
17504 start_symtab (name
, comp_dir
, low_pc
);
17505 record_debugformat ("DWARF 2");
17506 record_producer (cu
->producer
);
17508 /* We assume that we're processing GCC output. */
17509 processing_gcc_compilation
= 2;
17511 cu
->processing_has_namespace_info
= 0;
17515 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
17516 struct dwarf2_cu
*cu
)
17518 struct objfile
*objfile
= cu
->objfile
;
17519 struct comp_unit_head
*cu_header
= &cu
->header
;
17521 /* NOTE drow/2003-01-30: There used to be a comment and some special
17522 code here to turn a symbol with DW_AT_external and a
17523 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
17524 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
17525 with some versions of binutils) where shared libraries could have
17526 relocations against symbols in their debug information - the
17527 minimal symbol would have the right address, but the debug info
17528 would not. It's no longer necessary, because we will explicitly
17529 apply relocations when we read in the debug information now. */
17531 /* A DW_AT_location attribute with no contents indicates that a
17532 variable has been optimized away. */
17533 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
17535 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
17539 /* Handle one degenerate form of location expression specially, to
17540 preserve GDB's previous behavior when section offsets are
17541 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
17542 then mark this symbol as LOC_STATIC. */
17544 if (attr_form_is_block (attr
)
17545 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
17546 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
17547 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
17548 && (DW_BLOCK (attr
)->size
17549 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
17551 unsigned int dummy
;
17553 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
17554 SYMBOL_VALUE_ADDRESS (sym
) =
17555 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
17557 SYMBOL_VALUE_ADDRESS (sym
) =
17558 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
17559 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
17560 fixup_symbol_section (sym
, objfile
);
17561 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
17562 SYMBOL_SECTION (sym
));
17566 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
17567 expression evaluator, and use LOC_COMPUTED only when necessary
17568 (i.e. when the value of a register or memory location is
17569 referenced, or a thread-local block, etc.). Then again, it might
17570 not be worthwhile. I'm assuming that it isn't unless performance
17571 or memory numbers show me otherwise. */
17573 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
17575 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
17576 cu
->has_loclist
= 1;
17579 /* Given a pointer to a DWARF information entry, figure out if we need
17580 to make a symbol table entry for it, and if so, create a new entry
17581 and return a pointer to it.
17582 If TYPE is NULL, determine symbol type from the die, otherwise
17583 used the passed type.
17584 If SPACE is not NULL, use it to hold the new symbol. If it is
17585 NULL, allocate a new symbol on the objfile's obstack. */
17587 static struct symbol
*
17588 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
17589 struct symbol
*space
)
17591 struct objfile
*objfile
= cu
->objfile
;
17592 struct symbol
*sym
= NULL
;
17594 struct attribute
*attr
= NULL
;
17595 struct attribute
*attr2
= NULL
;
17596 CORE_ADDR baseaddr
;
17597 struct pending
**list_to_add
= NULL
;
17599 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
17601 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
17603 name
= dwarf2_name (die
, cu
);
17606 const char *linkagename
;
17607 int suppress_add
= 0;
17612 sym
= allocate_symbol (objfile
);
17613 OBJSTAT (objfile
, n_syms
++);
17615 /* Cache this symbol's name and the name's demangled form (if any). */
17616 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
17617 linkagename
= dwarf2_physname (name
, die
, cu
);
17618 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
17620 /* Fortran does not have mangling standard and the mangling does differ
17621 between gfortran, iFort etc. */
17622 if (cu
->language
== language_fortran
17623 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
17624 symbol_set_demangled_name (&(sym
->ginfo
),
17625 dwarf2_full_name (name
, die
, cu
),
17628 /* Default assumptions.
17629 Use the passed type or decode it from the die. */
17630 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
17631 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
17633 SYMBOL_TYPE (sym
) = type
;
17635 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
17636 attr
= dwarf2_attr (die
,
17637 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
17641 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
17644 attr
= dwarf2_attr (die
,
17645 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
17649 int file_index
= DW_UNSND (attr
);
17651 if (cu
->line_header
== NULL
17652 || file_index
> cu
->line_header
->num_file_names
)
17653 complaint (&symfile_complaints
,
17654 _("file index out of range"));
17655 else if (file_index
> 0)
17657 struct file_entry
*fe
;
17659 fe
= &cu
->line_header
->file_names
[file_index
- 1];
17660 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
17667 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
17669 SYMBOL_VALUE_ADDRESS (sym
)
17670 = attr_value_as_address (attr
) + baseaddr
;
17671 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
17672 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
17673 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
17674 add_symbol_to_list (sym
, cu
->list_in_scope
);
17676 case DW_TAG_subprogram
:
17677 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
17679 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
17680 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
17681 if ((attr2
&& (DW_UNSND (attr2
) != 0))
17682 || cu
->language
== language_ada
)
17684 /* Subprograms marked external are stored as a global symbol.
17685 Ada subprograms, whether marked external or not, are always
17686 stored as a global symbol, because we want to be able to
17687 access them globally. For instance, we want to be able
17688 to break on a nested subprogram without having to
17689 specify the context. */
17690 list_to_add
= &global_symbols
;
17694 list_to_add
= cu
->list_in_scope
;
17697 case DW_TAG_inlined_subroutine
:
17698 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
17700 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
17701 SYMBOL_INLINED (sym
) = 1;
17702 list_to_add
= cu
->list_in_scope
;
17704 case DW_TAG_template_value_param
:
17706 /* Fall through. */
17707 case DW_TAG_constant
:
17708 case DW_TAG_variable
:
17709 case DW_TAG_member
:
17710 /* Compilation with minimal debug info may result in
17711 variables with missing type entries. Change the
17712 misleading `void' type to something sensible. */
17713 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
17715 = objfile_type (objfile
)->nodebug_data_symbol
;
17717 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
17718 /* In the case of DW_TAG_member, we should only be called for
17719 static const members. */
17720 if (die
->tag
== DW_TAG_member
)
17722 /* dwarf2_add_field uses die_is_declaration,
17723 so we do the same. */
17724 gdb_assert (die_is_declaration (die
, cu
));
17729 dwarf2_const_value (attr
, sym
, cu
);
17730 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
17733 if (attr2
&& (DW_UNSND (attr2
) != 0))
17734 list_to_add
= &global_symbols
;
17736 list_to_add
= cu
->list_in_scope
;
17740 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
17743 var_decode_location (attr
, sym
, cu
);
17744 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
17746 /* Fortran explicitly imports any global symbols to the local
17747 scope by DW_TAG_common_block. */
17748 if (cu
->language
== language_fortran
&& die
->parent
17749 && die
->parent
->tag
== DW_TAG_common_block
)
17752 if (SYMBOL_CLASS (sym
) == LOC_STATIC
17753 && SYMBOL_VALUE_ADDRESS (sym
) == 0
17754 && !dwarf2_per_objfile
->has_section_at_zero
)
17756 /* When a static variable is eliminated by the linker,
17757 the corresponding debug information is not stripped
17758 out, but the variable address is set to null;
17759 do not add such variables into symbol table. */
17761 else if (attr2
&& (DW_UNSND (attr2
) != 0))
17763 /* Workaround gfortran PR debug/40040 - it uses
17764 DW_AT_location for variables in -fPIC libraries which may
17765 get overriden by other libraries/executable and get
17766 a different address. Resolve it by the minimal symbol
17767 which may come from inferior's executable using copy
17768 relocation. Make this workaround only for gfortran as for
17769 other compilers GDB cannot guess the minimal symbol
17770 Fortran mangling kind. */
17771 if (cu
->language
== language_fortran
&& die
->parent
17772 && die
->parent
->tag
== DW_TAG_module
17774 && strncmp (cu
->producer
, "GNU Fortran ", 12) == 0)
17775 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
17777 /* A variable with DW_AT_external is never static,
17778 but it may be block-scoped. */
17779 list_to_add
= (cu
->list_in_scope
== &file_symbols
17780 ? &global_symbols
: cu
->list_in_scope
);
17783 list_to_add
= cu
->list_in_scope
;
17787 /* We do not know the address of this symbol.
17788 If it is an external symbol and we have type information
17789 for it, enter the symbol as a LOC_UNRESOLVED symbol.
17790 The address of the variable will then be determined from
17791 the minimal symbol table whenever the variable is
17793 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
17795 /* Fortran explicitly imports any global symbols to the local
17796 scope by DW_TAG_common_block. */
17797 if (cu
->language
== language_fortran
&& die
->parent
17798 && die
->parent
->tag
== DW_TAG_common_block
)
17800 /* SYMBOL_CLASS doesn't matter here because
17801 read_common_block is going to reset it. */
17803 list_to_add
= cu
->list_in_scope
;
17805 else if (attr2
&& (DW_UNSND (attr2
) != 0)
17806 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
17808 /* A variable with DW_AT_external is never static, but it
17809 may be block-scoped. */
17810 list_to_add
= (cu
->list_in_scope
== &file_symbols
17811 ? &global_symbols
: cu
->list_in_scope
);
17813 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
17815 else if (!die_is_declaration (die
, cu
))
17817 /* Use the default LOC_OPTIMIZED_OUT class. */
17818 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
17820 list_to_add
= cu
->list_in_scope
;
17824 case DW_TAG_formal_parameter
:
17825 /* If we are inside a function, mark this as an argument. If
17826 not, we might be looking at an argument to an inlined function
17827 when we do not have enough information to show inlined frames;
17828 pretend it's a local variable in that case so that the user can
17830 if (context_stack_depth
> 0
17831 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
17832 SYMBOL_IS_ARGUMENT (sym
) = 1;
17833 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
17836 var_decode_location (attr
, sym
, cu
);
17838 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
17841 dwarf2_const_value (attr
, sym
, cu
);
17844 list_to_add
= cu
->list_in_scope
;
17846 case DW_TAG_unspecified_parameters
:
17847 /* From varargs functions; gdb doesn't seem to have any
17848 interest in this information, so just ignore it for now.
17851 case DW_TAG_template_type_param
:
17853 /* Fall through. */
17854 case DW_TAG_class_type
:
17855 case DW_TAG_interface_type
:
17856 case DW_TAG_structure_type
:
17857 case DW_TAG_union_type
:
17858 case DW_TAG_set_type
:
17859 case DW_TAG_enumeration_type
:
17860 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
17861 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
17864 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
17865 really ever be static objects: otherwise, if you try
17866 to, say, break of a class's method and you're in a file
17867 which doesn't mention that class, it won't work unless
17868 the check for all static symbols in lookup_symbol_aux
17869 saves you. See the OtherFileClass tests in
17870 gdb.c++/namespace.exp. */
17874 list_to_add
= (cu
->list_in_scope
== &file_symbols
17875 && (cu
->language
== language_cplus
17876 || cu
->language
== language_java
)
17877 ? &global_symbols
: cu
->list_in_scope
);
17879 /* The semantics of C++ state that "struct foo {
17880 ... }" also defines a typedef for "foo". A Java
17881 class declaration also defines a typedef for the
17883 if (cu
->language
== language_cplus
17884 || cu
->language
== language_java
17885 || cu
->language
== language_ada
)
17887 /* The symbol's name is already allocated along
17888 with this objfile, so we don't need to
17889 duplicate it for the type. */
17890 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
17891 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
17896 case DW_TAG_typedef
:
17897 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
17898 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
17899 list_to_add
= cu
->list_in_scope
;
17901 case DW_TAG_base_type
:
17902 case DW_TAG_subrange_type
:
17903 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
17904 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
17905 list_to_add
= cu
->list_in_scope
;
17907 case DW_TAG_enumerator
:
17908 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
17911 dwarf2_const_value (attr
, sym
, cu
);
17914 /* NOTE: carlton/2003-11-10: See comment above in the
17915 DW_TAG_class_type, etc. block. */
17917 list_to_add
= (cu
->list_in_scope
== &file_symbols
17918 && (cu
->language
== language_cplus
17919 || cu
->language
== language_java
)
17920 ? &global_symbols
: cu
->list_in_scope
);
17923 case DW_TAG_imported_declaration
:
17924 case DW_TAG_namespace
:
17925 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
17926 list_to_add
= &global_symbols
;
17928 case DW_TAG_module
:
17929 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
17930 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
17931 list_to_add
= &global_symbols
;
17933 case DW_TAG_common_block
:
17934 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
17935 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
17936 add_symbol_to_list (sym
, cu
->list_in_scope
);
17939 /* Not a tag we recognize. Hopefully we aren't processing
17940 trash data, but since we must specifically ignore things
17941 we don't recognize, there is nothing else we should do at
17943 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
17944 dwarf_tag_name (die
->tag
));
17950 sym
->hash_next
= objfile
->template_symbols
;
17951 objfile
->template_symbols
= sym
;
17952 list_to_add
= NULL
;
17955 if (list_to_add
!= NULL
)
17956 add_symbol_to_list (sym
, list_to_add
);
17958 /* For the benefit of old versions of GCC, check for anonymous
17959 namespaces based on the demangled name. */
17960 if (!cu
->processing_has_namespace_info
17961 && cu
->language
== language_cplus
)
17962 cp_scan_for_anonymous_namespaces (sym
, objfile
);
17967 /* A wrapper for new_symbol_full that always allocates a new symbol. */
17969 static struct symbol
*
17970 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
17972 return new_symbol_full (die
, type
, cu
, NULL
);
17975 /* Given an attr with a DW_FORM_dataN value in host byte order,
17976 zero-extend it as appropriate for the symbol's type. The DWARF
17977 standard (v4) is not entirely clear about the meaning of using
17978 DW_FORM_dataN for a constant with a signed type, where the type is
17979 wider than the data. The conclusion of a discussion on the DWARF
17980 list was that this is unspecified. We choose to always zero-extend
17981 because that is the interpretation long in use by GCC. */
17984 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
17985 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
17987 struct objfile
*objfile
= cu
->objfile
;
17988 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
17989 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
17990 LONGEST l
= DW_UNSND (attr
);
17992 if (bits
< sizeof (*value
) * 8)
17994 l
&= ((LONGEST
) 1 << bits
) - 1;
17997 else if (bits
== sizeof (*value
) * 8)
18001 gdb_byte
*bytes
= obstack_alloc (obstack
, bits
/ 8);
18002 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
18009 /* Read a constant value from an attribute. Either set *VALUE, or if
18010 the value does not fit in *VALUE, set *BYTES - either already
18011 allocated on the objfile obstack, or newly allocated on OBSTACK,
18012 or, set *BATON, if we translated the constant to a location
18016 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
18017 const char *name
, struct obstack
*obstack
,
18018 struct dwarf2_cu
*cu
,
18019 LONGEST
*value
, const gdb_byte
**bytes
,
18020 struct dwarf2_locexpr_baton
**baton
)
18022 struct objfile
*objfile
= cu
->objfile
;
18023 struct comp_unit_head
*cu_header
= &cu
->header
;
18024 struct dwarf_block
*blk
;
18025 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
18026 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
18032 switch (attr
->form
)
18035 case DW_FORM_GNU_addr_index
:
18039 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
18040 dwarf2_const_value_length_mismatch_complaint (name
,
18041 cu_header
->addr_size
,
18042 TYPE_LENGTH (type
));
18043 /* Symbols of this form are reasonably rare, so we just
18044 piggyback on the existing location code rather than writing
18045 a new implementation of symbol_computed_ops. */
18046 *baton
= obstack_alloc (obstack
, sizeof (struct dwarf2_locexpr_baton
));
18047 (*baton
)->per_cu
= cu
->per_cu
;
18048 gdb_assert ((*baton
)->per_cu
);
18050 (*baton
)->size
= 2 + cu_header
->addr_size
;
18051 data
= obstack_alloc (obstack
, (*baton
)->size
);
18052 (*baton
)->data
= data
;
18054 data
[0] = DW_OP_addr
;
18055 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
18056 byte_order
, DW_ADDR (attr
));
18057 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
18060 case DW_FORM_string
:
18062 case DW_FORM_GNU_str_index
:
18063 case DW_FORM_GNU_strp_alt
:
18064 /* DW_STRING is already allocated on the objfile obstack, point
18066 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
18068 case DW_FORM_block1
:
18069 case DW_FORM_block2
:
18070 case DW_FORM_block4
:
18071 case DW_FORM_block
:
18072 case DW_FORM_exprloc
:
18073 blk
= DW_BLOCK (attr
);
18074 if (TYPE_LENGTH (type
) != blk
->size
)
18075 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
18076 TYPE_LENGTH (type
));
18077 *bytes
= blk
->data
;
18080 /* The DW_AT_const_value attributes are supposed to carry the
18081 symbol's value "represented as it would be on the target
18082 architecture." By the time we get here, it's already been
18083 converted to host endianness, so we just need to sign- or
18084 zero-extend it as appropriate. */
18085 case DW_FORM_data1
:
18086 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
18088 case DW_FORM_data2
:
18089 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
18091 case DW_FORM_data4
:
18092 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
18094 case DW_FORM_data8
:
18095 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
18098 case DW_FORM_sdata
:
18099 *value
= DW_SND (attr
);
18102 case DW_FORM_udata
:
18103 *value
= DW_UNSND (attr
);
18107 complaint (&symfile_complaints
,
18108 _("unsupported const value attribute form: '%s'"),
18109 dwarf_form_name (attr
->form
));
18116 /* Copy constant value from an attribute to a symbol. */
18119 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
18120 struct dwarf2_cu
*cu
)
18122 struct objfile
*objfile
= cu
->objfile
;
18123 struct comp_unit_head
*cu_header
= &cu
->header
;
18125 const gdb_byte
*bytes
;
18126 struct dwarf2_locexpr_baton
*baton
;
18128 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
18129 SYMBOL_PRINT_NAME (sym
),
18130 &objfile
->objfile_obstack
, cu
,
18131 &value
, &bytes
, &baton
);
18135 SYMBOL_LOCATION_BATON (sym
) = baton
;
18136 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
18138 else if (bytes
!= NULL
)
18140 SYMBOL_VALUE_BYTES (sym
) = bytes
;
18141 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
18145 SYMBOL_VALUE (sym
) = value
;
18146 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
18150 /* Return the type of the die in question using its DW_AT_type attribute. */
18152 static struct type
*
18153 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18155 struct attribute
*type_attr
;
18157 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
18160 /* A missing DW_AT_type represents a void type. */
18161 return objfile_type (cu
->objfile
)->builtin_void
;
18164 return lookup_die_type (die
, type_attr
, cu
);
18167 /* True iff CU's producer generates GNAT Ada auxiliary information
18168 that allows to find parallel types through that information instead
18169 of having to do expensive parallel lookups by type name. */
18172 need_gnat_info (struct dwarf2_cu
*cu
)
18174 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
18175 of GNAT produces this auxiliary information, without any indication
18176 that it is produced. Part of enhancing the FSF version of GNAT
18177 to produce that information will be to put in place an indicator
18178 that we can use in order to determine whether the descriptive type
18179 info is available or not. One suggestion that has been made is
18180 to use a new attribute, attached to the CU die. For now, assume
18181 that the descriptive type info is not available. */
18185 /* Return the auxiliary type of the die in question using its
18186 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
18187 attribute is not present. */
18189 static struct type
*
18190 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18192 struct attribute
*type_attr
;
18194 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
18198 return lookup_die_type (die
, type_attr
, cu
);
18201 /* If DIE has a descriptive_type attribute, then set the TYPE's
18202 descriptive type accordingly. */
18205 set_descriptive_type (struct type
*type
, struct die_info
*die
,
18206 struct dwarf2_cu
*cu
)
18208 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
18210 if (descriptive_type
)
18212 ALLOCATE_GNAT_AUX_TYPE (type
);
18213 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
18217 /* Return the containing type of the die in question using its
18218 DW_AT_containing_type attribute. */
18220 static struct type
*
18221 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18223 struct attribute
*type_attr
;
18225 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
18227 error (_("Dwarf Error: Problem turning containing type into gdb type "
18228 "[in module %s]"), objfile_name (cu
->objfile
));
18230 return lookup_die_type (die
, type_attr
, cu
);
18233 /* Return an error marker type to use for the ill formed type in DIE/CU. */
18235 static struct type
*
18236 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
18238 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18239 char *message
, *saved
;
18241 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
18242 objfile_name (objfile
),
18243 cu
->header
.offset
.sect_off
,
18244 die
->offset
.sect_off
);
18245 saved
= obstack_copy0 (&objfile
->objfile_obstack
,
18246 message
, strlen (message
));
18249 return init_type (TYPE_CODE_ERROR
, 0, 0, saved
, objfile
);
18252 /* Look up the type of DIE in CU using its type attribute ATTR.
18253 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
18254 DW_AT_containing_type.
18255 If there is no type substitute an error marker. */
18257 static struct type
*
18258 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
18259 struct dwarf2_cu
*cu
)
18261 struct objfile
*objfile
= cu
->objfile
;
18262 struct type
*this_type
;
18264 gdb_assert (attr
->name
== DW_AT_type
18265 || attr
->name
== DW_AT_GNAT_descriptive_type
18266 || attr
->name
== DW_AT_containing_type
);
18268 /* First see if we have it cached. */
18270 if (attr
->form
== DW_FORM_GNU_ref_alt
)
18272 struct dwarf2_per_cu_data
*per_cu
;
18273 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
18275 per_cu
= dwarf2_find_containing_comp_unit (offset
, 1, cu
->objfile
);
18276 this_type
= get_die_type_at_offset (offset
, per_cu
);
18278 else if (attr_form_is_ref (attr
))
18280 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
18282 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
18284 else if (attr
->form
== DW_FORM_ref_sig8
)
18286 ULONGEST signature
= DW_SIGNATURE (attr
);
18288 return get_signatured_type (die
, signature
, cu
);
18292 complaint (&symfile_complaints
,
18293 _("Dwarf Error: Bad type attribute %s in DIE"
18294 " at 0x%x [in module %s]"),
18295 dwarf_attr_name (attr
->name
), die
->offset
.sect_off
,
18296 objfile_name (objfile
));
18297 return build_error_marker_type (cu
, die
);
18300 /* If not cached we need to read it in. */
18302 if (this_type
== NULL
)
18304 struct die_info
*type_die
= NULL
;
18305 struct dwarf2_cu
*type_cu
= cu
;
18307 if (attr_form_is_ref (attr
))
18308 type_die
= follow_die_ref (die
, attr
, &type_cu
);
18309 if (type_die
== NULL
)
18310 return build_error_marker_type (cu
, die
);
18311 /* If we find the type now, it's probably because the type came
18312 from an inter-CU reference and the type's CU got expanded before
18314 this_type
= read_type_die (type_die
, type_cu
);
18317 /* If we still don't have a type use an error marker. */
18319 if (this_type
== NULL
)
18320 return build_error_marker_type (cu
, die
);
18325 /* Return the type in DIE, CU.
18326 Returns NULL for invalid types.
18328 This first does a lookup in die_type_hash,
18329 and only reads the die in if necessary.
18331 NOTE: This can be called when reading in partial or full symbols. */
18333 static struct type
*
18334 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
18336 struct type
*this_type
;
18338 this_type
= get_die_type (die
, cu
);
18342 return read_type_die_1 (die
, cu
);
18345 /* Read the type in DIE, CU.
18346 Returns NULL for invalid types. */
18348 static struct type
*
18349 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
18351 struct type
*this_type
= NULL
;
18355 case DW_TAG_class_type
:
18356 case DW_TAG_interface_type
:
18357 case DW_TAG_structure_type
:
18358 case DW_TAG_union_type
:
18359 this_type
= read_structure_type (die
, cu
);
18361 case DW_TAG_enumeration_type
:
18362 this_type
= read_enumeration_type (die
, cu
);
18364 case DW_TAG_subprogram
:
18365 case DW_TAG_subroutine_type
:
18366 case DW_TAG_inlined_subroutine
:
18367 this_type
= read_subroutine_type (die
, cu
);
18369 case DW_TAG_array_type
:
18370 this_type
= read_array_type (die
, cu
);
18372 case DW_TAG_set_type
:
18373 this_type
= read_set_type (die
, cu
);
18375 case DW_TAG_pointer_type
:
18376 this_type
= read_tag_pointer_type (die
, cu
);
18378 case DW_TAG_ptr_to_member_type
:
18379 this_type
= read_tag_ptr_to_member_type (die
, cu
);
18381 case DW_TAG_reference_type
:
18382 this_type
= read_tag_reference_type (die
, cu
);
18384 case DW_TAG_const_type
:
18385 this_type
= read_tag_const_type (die
, cu
);
18387 case DW_TAG_volatile_type
:
18388 this_type
= read_tag_volatile_type (die
, cu
);
18390 case DW_TAG_restrict_type
:
18391 this_type
= read_tag_restrict_type (die
, cu
);
18393 case DW_TAG_string_type
:
18394 this_type
= read_tag_string_type (die
, cu
);
18396 case DW_TAG_typedef
:
18397 this_type
= read_typedef (die
, cu
);
18399 case DW_TAG_subrange_type
:
18400 this_type
= read_subrange_type (die
, cu
);
18402 case DW_TAG_base_type
:
18403 this_type
= read_base_type (die
, cu
);
18405 case DW_TAG_unspecified_type
:
18406 this_type
= read_unspecified_type (die
, cu
);
18408 case DW_TAG_namespace
:
18409 this_type
= read_namespace_type (die
, cu
);
18411 case DW_TAG_module
:
18412 this_type
= read_module_type (die
, cu
);
18415 complaint (&symfile_complaints
,
18416 _("unexpected tag in read_type_die: '%s'"),
18417 dwarf_tag_name (die
->tag
));
18424 /* See if we can figure out if the class lives in a namespace. We do
18425 this by looking for a member function; its demangled name will
18426 contain namespace info, if there is any.
18427 Return the computed name or NULL.
18428 Space for the result is allocated on the objfile's obstack.
18429 This is the full-die version of guess_partial_die_structure_name.
18430 In this case we know DIE has no useful parent. */
18433 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
18435 struct die_info
*spec_die
;
18436 struct dwarf2_cu
*spec_cu
;
18437 struct die_info
*child
;
18440 spec_die
= die_specification (die
, &spec_cu
);
18441 if (spec_die
!= NULL
)
18447 for (child
= die
->child
;
18449 child
= child
->sibling
)
18451 if (child
->tag
== DW_TAG_subprogram
)
18453 struct attribute
*attr
;
18455 attr
= dwarf2_attr (child
, DW_AT_linkage_name
, cu
);
18457 attr
= dwarf2_attr (child
, DW_AT_MIPS_linkage_name
, cu
);
18461 = language_class_name_from_physname (cu
->language_defn
,
18465 if (actual_name
!= NULL
)
18467 const char *die_name
= dwarf2_name (die
, cu
);
18469 if (die_name
!= NULL
18470 && strcmp (die_name
, actual_name
) != 0)
18472 /* Strip off the class name from the full name.
18473 We want the prefix. */
18474 int die_name_len
= strlen (die_name
);
18475 int actual_name_len
= strlen (actual_name
);
18477 /* Test for '::' as a sanity check. */
18478 if (actual_name_len
> die_name_len
+ 2
18479 && actual_name
[actual_name_len
18480 - die_name_len
- 1] == ':')
18482 obstack_copy0 (&cu
->objfile
->objfile_obstack
,
18484 actual_name_len
- die_name_len
- 2);
18487 xfree (actual_name
);
18496 /* GCC might emit a nameless typedef that has a linkage name. Determine the
18497 prefix part in such case. See
18498 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
18501 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
18503 struct attribute
*attr
;
18506 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
18507 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
18510 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
18511 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
18514 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
18516 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
18517 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
18520 /* dwarf2_name had to be already called. */
18521 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
18523 /* Strip the base name, keep any leading namespaces/classes. */
18524 base
= strrchr (DW_STRING (attr
), ':');
18525 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
18528 return obstack_copy0 (&cu
->objfile
->objfile_obstack
,
18529 DW_STRING (attr
), &base
[-1] - DW_STRING (attr
));
18532 /* Return the name of the namespace/class that DIE is defined within,
18533 or "" if we can't tell. The caller should not xfree the result.
18535 For example, if we're within the method foo() in the following
18545 then determine_prefix on foo's die will return "N::C". */
18547 static const char *
18548 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
18550 struct die_info
*parent
, *spec_die
;
18551 struct dwarf2_cu
*spec_cu
;
18552 struct type
*parent_type
;
18555 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
18556 && cu
->language
!= language_fortran
)
18559 retval
= anonymous_struct_prefix (die
, cu
);
18563 /* We have to be careful in the presence of DW_AT_specification.
18564 For example, with GCC 3.4, given the code
18568 // Definition of N::foo.
18572 then we'll have a tree of DIEs like this:
18574 1: DW_TAG_compile_unit
18575 2: DW_TAG_namespace // N
18576 3: DW_TAG_subprogram // declaration of N::foo
18577 4: DW_TAG_subprogram // definition of N::foo
18578 DW_AT_specification // refers to die #3
18580 Thus, when processing die #4, we have to pretend that we're in
18581 the context of its DW_AT_specification, namely the contex of die
18584 spec_die
= die_specification (die
, &spec_cu
);
18585 if (spec_die
== NULL
)
18586 parent
= die
->parent
;
18589 parent
= spec_die
->parent
;
18593 if (parent
== NULL
)
18595 else if (parent
->building_fullname
)
18598 const char *parent_name
;
18600 /* It has been seen on RealView 2.2 built binaries,
18601 DW_TAG_template_type_param types actually _defined_ as
18602 children of the parent class:
18605 template class <class Enum> Class{};
18606 Class<enum E> class_e;
18608 1: DW_TAG_class_type (Class)
18609 2: DW_TAG_enumeration_type (E)
18610 3: DW_TAG_enumerator (enum1:0)
18611 3: DW_TAG_enumerator (enum2:1)
18613 2: DW_TAG_template_type_param
18614 DW_AT_type DW_FORM_ref_udata (E)
18616 Besides being broken debug info, it can put GDB into an
18617 infinite loop. Consider:
18619 When we're building the full name for Class<E>, we'll start
18620 at Class, and go look over its template type parameters,
18621 finding E. We'll then try to build the full name of E, and
18622 reach here. We're now trying to build the full name of E,
18623 and look over the parent DIE for containing scope. In the
18624 broken case, if we followed the parent DIE of E, we'd again
18625 find Class, and once again go look at its template type
18626 arguments, etc., etc. Simply don't consider such parent die
18627 as source-level parent of this die (it can't be, the language
18628 doesn't allow it), and break the loop here. */
18629 name
= dwarf2_name (die
, cu
);
18630 parent_name
= dwarf2_name (parent
, cu
);
18631 complaint (&symfile_complaints
,
18632 _("template param type '%s' defined within parent '%s'"),
18633 name
? name
: "<unknown>",
18634 parent_name
? parent_name
: "<unknown>");
18638 switch (parent
->tag
)
18640 case DW_TAG_namespace
:
18641 parent_type
= read_type_die (parent
, cu
);
18642 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
18643 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
18644 Work around this problem here. */
18645 if (cu
->language
== language_cplus
18646 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
18648 /* We give a name to even anonymous namespaces. */
18649 return TYPE_TAG_NAME (parent_type
);
18650 case DW_TAG_class_type
:
18651 case DW_TAG_interface_type
:
18652 case DW_TAG_structure_type
:
18653 case DW_TAG_union_type
:
18654 case DW_TAG_module
:
18655 parent_type
= read_type_die (parent
, cu
);
18656 if (TYPE_TAG_NAME (parent_type
) != NULL
)
18657 return TYPE_TAG_NAME (parent_type
);
18659 /* An anonymous structure is only allowed non-static data
18660 members; no typedefs, no member functions, et cetera.
18661 So it does not need a prefix. */
18663 case DW_TAG_compile_unit
:
18664 case DW_TAG_partial_unit
:
18665 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
18666 if (cu
->language
== language_cplus
18667 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
18668 && die
->child
!= NULL
18669 && (die
->tag
== DW_TAG_class_type
18670 || die
->tag
== DW_TAG_structure_type
18671 || die
->tag
== DW_TAG_union_type
))
18673 char *name
= guess_full_die_structure_name (die
, cu
);
18678 case DW_TAG_enumeration_type
:
18679 parent_type
= read_type_die (parent
, cu
);
18680 if (TYPE_DECLARED_CLASS (parent_type
))
18682 if (TYPE_TAG_NAME (parent_type
) != NULL
)
18683 return TYPE_TAG_NAME (parent_type
);
18686 /* Fall through. */
18688 return determine_prefix (parent
, cu
);
18692 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
18693 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
18694 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
18695 an obconcat, otherwise allocate storage for the result. The CU argument is
18696 used to determine the language and hence, the appropriate separator. */
18698 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
18701 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
18702 int physname
, struct dwarf2_cu
*cu
)
18704 const char *lead
= "";
18707 if (suffix
== NULL
|| suffix
[0] == '\0'
18708 || prefix
== NULL
|| prefix
[0] == '\0')
18710 else if (cu
->language
== language_java
)
18712 else if (cu
->language
== language_fortran
&& physname
)
18714 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
18715 DW_AT_MIPS_linkage_name is preferred and used instead. */
18723 if (prefix
== NULL
)
18725 if (suffix
== NULL
)
18731 = xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
18733 strcpy (retval
, lead
);
18734 strcat (retval
, prefix
);
18735 strcat (retval
, sep
);
18736 strcat (retval
, suffix
);
18741 /* We have an obstack. */
18742 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
18746 /* Return sibling of die, NULL if no sibling. */
18748 static struct die_info
*
18749 sibling_die (struct die_info
*die
)
18751 return die
->sibling
;
18754 /* Get name of a die, return NULL if not found. */
18756 static const char *
18757 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
18758 struct obstack
*obstack
)
18760 if (name
&& cu
->language
== language_cplus
)
18762 char *canon_name
= cp_canonicalize_string (name
);
18764 if (canon_name
!= NULL
)
18766 if (strcmp (canon_name
, name
) != 0)
18767 name
= obstack_copy0 (obstack
, canon_name
, strlen (canon_name
));
18768 xfree (canon_name
);
18775 /* Get name of a die, return NULL if not found. */
18777 static const char *
18778 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
18780 struct attribute
*attr
;
18782 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
18783 if ((!attr
|| !DW_STRING (attr
))
18784 && die
->tag
!= DW_TAG_class_type
18785 && die
->tag
!= DW_TAG_interface_type
18786 && die
->tag
!= DW_TAG_structure_type
18787 && die
->tag
!= DW_TAG_union_type
)
18792 case DW_TAG_compile_unit
:
18793 case DW_TAG_partial_unit
:
18794 /* Compilation units have a DW_AT_name that is a filename, not
18795 a source language identifier. */
18796 case DW_TAG_enumeration_type
:
18797 case DW_TAG_enumerator
:
18798 /* These tags always have simple identifiers already; no need
18799 to canonicalize them. */
18800 return DW_STRING (attr
);
18802 case DW_TAG_subprogram
:
18803 /* Java constructors will all be named "<init>", so return
18804 the class name when we see this special case. */
18805 if (cu
->language
== language_java
18806 && DW_STRING (attr
) != NULL
18807 && strcmp (DW_STRING (attr
), "<init>") == 0)
18809 struct dwarf2_cu
*spec_cu
= cu
;
18810 struct die_info
*spec_die
;
18812 /* GCJ will output '<init>' for Java constructor names.
18813 For this special case, return the name of the parent class. */
18815 /* GCJ may output suprogram DIEs with AT_specification set.
18816 If so, use the name of the specified DIE. */
18817 spec_die
= die_specification (die
, &spec_cu
);
18818 if (spec_die
!= NULL
)
18819 return dwarf2_name (spec_die
, spec_cu
);
18824 if (die
->tag
== DW_TAG_class_type
)
18825 return dwarf2_name (die
, cu
);
18827 while (die
->tag
!= DW_TAG_compile_unit
18828 && die
->tag
!= DW_TAG_partial_unit
);
18832 case DW_TAG_class_type
:
18833 case DW_TAG_interface_type
:
18834 case DW_TAG_structure_type
:
18835 case DW_TAG_union_type
:
18836 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
18837 structures or unions. These were of the form "._%d" in GCC 4.1,
18838 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
18839 and GCC 4.4. We work around this problem by ignoring these. */
18840 if (attr
&& DW_STRING (attr
)
18841 && (strncmp (DW_STRING (attr
), "._", 2) == 0
18842 || strncmp (DW_STRING (attr
), "<anonymous", 10) == 0))
18845 /* GCC might emit a nameless typedef that has a linkage name. See
18846 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
18847 if (!attr
|| DW_STRING (attr
) == NULL
)
18849 char *demangled
= NULL
;
18851 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
18853 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
18855 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
18858 /* Avoid demangling DW_STRING (attr) the second time on a second
18859 call for the same DIE. */
18860 if (!DW_STRING_IS_CANONICAL (attr
))
18861 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
18867 /* FIXME: we already did this for the partial symbol... */
18868 DW_STRING (attr
) = obstack_copy0 (&cu
->objfile
->objfile_obstack
,
18869 demangled
, strlen (demangled
));
18870 DW_STRING_IS_CANONICAL (attr
) = 1;
18873 /* Strip any leading namespaces/classes, keep only the base name.
18874 DW_AT_name for named DIEs does not contain the prefixes. */
18875 base
= strrchr (DW_STRING (attr
), ':');
18876 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
18879 return DW_STRING (attr
);
18888 if (!DW_STRING_IS_CANONICAL (attr
))
18891 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
18892 &cu
->objfile
->objfile_obstack
);
18893 DW_STRING_IS_CANONICAL (attr
) = 1;
18895 return DW_STRING (attr
);
18898 /* Return the die that this die in an extension of, or NULL if there
18899 is none. *EXT_CU is the CU containing DIE on input, and the CU
18900 containing the return value on output. */
18902 static struct die_info
*
18903 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
18905 struct attribute
*attr
;
18907 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
18911 return follow_die_ref (die
, attr
, ext_cu
);
18914 /* Convert a DIE tag into its string name. */
18916 static const char *
18917 dwarf_tag_name (unsigned tag
)
18919 const char *name
= get_DW_TAG_name (tag
);
18922 return "DW_TAG_<unknown>";
18927 /* Convert a DWARF attribute code into its string name. */
18929 static const char *
18930 dwarf_attr_name (unsigned attr
)
18934 #ifdef MIPS /* collides with DW_AT_HP_block_index */
18935 if (attr
== DW_AT_MIPS_fde
)
18936 return "DW_AT_MIPS_fde";
18938 if (attr
== DW_AT_HP_block_index
)
18939 return "DW_AT_HP_block_index";
18942 name
= get_DW_AT_name (attr
);
18945 return "DW_AT_<unknown>";
18950 /* Convert a DWARF value form code into its string name. */
18952 static const char *
18953 dwarf_form_name (unsigned form
)
18955 const char *name
= get_DW_FORM_name (form
);
18958 return "DW_FORM_<unknown>";
18964 dwarf_bool_name (unsigned mybool
)
18972 /* Convert a DWARF type code into its string name. */
18974 static const char *
18975 dwarf_type_encoding_name (unsigned enc
)
18977 const char *name
= get_DW_ATE_name (enc
);
18980 return "DW_ATE_<unknown>";
18986 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
18990 print_spaces (indent
, f
);
18991 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
18992 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
.sect_off
);
18994 if (die
->parent
!= NULL
)
18996 print_spaces (indent
, f
);
18997 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
18998 die
->parent
->offset
.sect_off
);
19001 print_spaces (indent
, f
);
19002 fprintf_unfiltered (f
, " has children: %s\n",
19003 dwarf_bool_name (die
->child
!= NULL
));
19005 print_spaces (indent
, f
);
19006 fprintf_unfiltered (f
, " attributes:\n");
19008 for (i
= 0; i
< die
->num_attrs
; ++i
)
19010 print_spaces (indent
, f
);
19011 fprintf_unfiltered (f
, " %s (%s) ",
19012 dwarf_attr_name (die
->attrs
[i
].name
),
19013 dwarf_form_name (die
->attrs
[i
].form
));
19015 switch (die
->attrs
[i
].form
)
19018 case DW_FORM_GNU_addr_index
:
19019 fprintf_unfiltered (f
, "address: ");
19020 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
19022 case DW_FORM_block2
:
19023 case DW_FORM_block4
:
19024 case DW_FORM_block
:
19025 case DW_FORM_block1
:
19026 fprintf_unfiltered (f
, "block: size %s",
19027 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
19029 case DW_FORM_exprloc
:
19030 fprintf_unfiltered (f
, "expression: size %s",
19031 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
19033 case DW_FORM_ref_addr
:
19034 fprintf_unfiltered (f
, "ref address: ");
19035 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
19037 case DW_FORM_GNU_ref_alt
:
19038 fprintf_unfiltered (f
, "alt ref address: ");
19039 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
19045 case DW_FORM_ref_udata
:
19046 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
19047 (long) (DW_UNSND (&die
->attrs
[i
])));
19049 case DW_FORM_data1
:
19050 case DW_FORM_data2
:
19051 case DW_FORM_data4
:
19052 case DW_FORM_data8
:
19053 case DW_FORM_udata
:
19054 case DW_FORM_sdata
:
19055 fprintf_unfiltered (f
, "constant: %s",
19056 pulongest (DW_UNSND (&die
->attrs
[i
])));
19058 case DW_FORM_sec_offset
:
19059 fprintf_unfiltered (f
, "section offset: %s",
19060 pulongest (DW_UNSND (&die
->attrs
[i
])));
19062 case DW_FORM_ref_sig8
:
19063 fprintf_unfiltered (f
, "signature: %s",
19064 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
19066 case DW_FORM_string
:
19068 case DW_FORM_GNU_str_index
:
19069 case DW_FORM_GNU_strp_alt
:
19070 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
19071 DW_STRING (&die
->attrs
[i
])
19072 ? DW_STRING (&die
->attrs
[i
]) : "",
19073 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
19076 if (DW_UNSND (&die
->attrs
[i
]))
19077 fprintf_unfiltered (f
, "flag: TRUE");
19079 fprintf_unfiltered (f
, "flag: FALSE");
19081 case DW_FORM_flag_present
:
19082 fprintf_unfiltered (f
, "flag: TRUE");
19084 case DW_FORM_indirect
:
19085 /* The reader will have reduced the indirect form to
19086 the "base form" so this form should not occur. */
19087 fprintf_unfiltered (f
,
19088 "unexpected attribute form: DW_FORM_indirect");
19091 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
19092 die
->attrs
[i
].form
);
19095 fprintf_unfiltered (f
, "\n");
19100 dump_die_for_error (struct die_info
*die
)
19102 dump_die_shallow (gdb_stderr
, 0, die
);
19106 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
19108 int indent
= level
* 4;
19110 gdb_assert (die
!= NULL
);
19112 if (level
>= max_level
)
19115 dump_die_shallow (f
, indent
, die
);
19117 if (die
->child
!= NULL
)
19119 print_spaces (indent
, f
);
19120 fprintf_unfiltered (f
, " Children:");
19121 if (level
+ 1 < max_level
)
19123 fprintf_unfiltered (f
, "\n");
19124 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
19128 fprintf_unfiltered (f
,
19129 " [not printed, max nesting level reached]\n");
19133 if (die
->sibling
!= NULL
&& level
> 0)
19135 dump_die_1 (f
, level
, max_level
, die
->sibling
);
19139 /* This is called from the pdie macro in gdbinit.in.
19140 It's not static so gcc will keep a copy callable from gdb. */
19143 dump_die (struct die_info
*die
, int max_level
)
19145 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
19149 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
19153 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
.sect_off
,
19159 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
19163 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
19165 sect_offset retval
= { DW_UNSND (attr
) };
19167 if (attr_form_is_ref (attr
))
19170 retval
.sect_off
= 0;
19171 complaint (&symfile_complaints
,
19172 _("unsupported die ref attribute form: '%s'"),
19173 dwarf_form_name (attr
->form
));
19177 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
19178 * the value held by the attribute is not constant. */
19181 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
19183 if (attr
->form
== DW_FORM_sdata
)
19184 return DW_SND (attr
);
19185 else if (attr
->form
== DW_FORM_udata
19186 || attr
->form
== DW_FORM_data1
19187 || attr
->form
== DW_FORM_data2
19188 || attr
->form
== DW_FORM_data4
19189 || attr
->form
== DW_FORM_data8
)
19190 return DW_UNSND (attr
);
19193 complaint (&symfile_complaints
,
19194 _("Attribute value is not a constant (%s)"),
19195 dwarf_form_name (attr
->form
));
19196 return default_value
;
19200 /* Follow reference or signature attribute ATTR of SRC_DIE.
19201 On entry *REF_CU is the CU of SRC_DIE.
19202 On exit *REF_CU is the CU of the result. */
19204 static struct die_info
*
19205 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
19206 struct dwarf2_cu
**ref_cu
)
19208 struct die_info
*die
;
19210 if (attr_form_is_ref (attr
))
19211 die
= follow_die_ref (src_die
, attr
, ref_cu
);
19212 else if (attr
->form
== DW_FORM_ref_sig8
)
19213 die
= follow_die_sig (src_die
, attr
, ref_cu
);
19216 dump_die_for_error (src_die
);
19217 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
19218 objfile_name ((*ref_cu
)->objfile
));
19224 /* Follow reference OFFSET.
19225 On entry *REF_CU is the CU of the source die referencing OFFSET.
19226 On exit *REF_CU is the CU of the result.
19227 Returns NULL if OFFSET is invalid. */
19229 static struct die_info
*
19230 follow_die_offset (sect_offset offset
, int offset_in_dwz
,
19231 struct dwarf2_cu
**ref_cu
)
19233 struct die_info temp_die
;
19234 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
19236 gdb_assert (cu
->per_cu
!= NULL
);
19240 if (cu
->per_cu
->is_debug_types
)
19242 /* .debug_types CUs cannot reference anything outside their CU.
19243 If they need to, they have to reference a signatured type via
19244 DW_FORM_ref_sig8. */
19245 if (! offset_in_cu_p (&cu
->header
, offset
))
19248 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
19249 || ! offset_in_cu_p (&cu
->header
, offset
))
19251 struct dwarf2_per_cu_data
*per_cu
;
19253 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
19256 /* If necessary, add it to the queue and load its DIEs. */
19257 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
19258 load_full_comp_unit (per_cu
, cu
->language
);
19260 target_cu
= per_cu
->cu
;
19262 else if (cu
->dies
== NULL
)
19264 /* We're loading full DIEs during partial symbol reading. */
19265 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
19266 load_full_comp_unit (cu
->per_cu
, language_minimal
);
19269 *ref_cu
= target_cu
;
19270 temp_die
.offset
= offset
;
19271 return htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
.sect_off
);
19274 /* Follow reference attribute ATTR of SRC_DIE.
19275 On entry *REF_CU is the CU of SRC_DIE.
19276 On exit *REF_CU is the CU of the result. */
19278 static struct die_info
*
19279 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
19280 struct dwarf2_cu
**ref_cu
)
19282 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
19283 struct dwarf2_cu
*cu
= *ref_cu
;
19284 struct die_info
*die
;
19286 die
= follow_die_offset (offset
,
19287 (attr
->form
== DW_FORM_GNU_ref_alt
19288 || cu
->per_cu
->is_dwz
),
19291 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
19292 "at 0x%x [in module %s]"),
19293 offset
.sect_off
, src_die
->offset
.sect_off
,
19294 objfile_name (cu
->objfile
));
19299 /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU.
19300 Returned value is intended for DW_OP_call*. Returned
19301 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
19303 struct dwarf2_locexpr_baton
19304 dwarf2_fetch_die_loc_sect_off (sect_offset offset
,
19305 struct dwarf2_per_cu_data
*per_cu
,
19306 CORE_ADDR (*get_frame_pc
) (void *baton
),
19309 struct dwarf2_cu
*cu
;
19310 struct die_info
*die
;
19311 struct attribute
*attr
;
19312 struct dwarf2_locexpr_baton retval
;
19314 dw2_setup (per_cu
->objfile
);
19316 if (per_cu
->cu
== NULL
)
19320 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
19322 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
19323 offset
.sect_off
, objfile_name (per_cu
->objfile
));
19325 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
19328 /* DWARF: "If there is no such attribute, then there is no effect.".
19329 DATA is ignored if SIZE is 0. */
19331 retval
.data
= NULL
;
19334 else if (attr_form_is_section_offset (attr
))
19336 struct dwarf2_loclist_baton loclist_baton
;
19337 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
19340 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
19342 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
19344 retval
.size
= size
;
19348 if (!attr_form_is_block (attr
))
19349 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
19350 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
19351 offset
.sect_off
, objfile_name (per_cu
->objfile
));
19353 retval
.data
= DW_BLOCK (attr
)->data
;
19354 retval
.size
= DW_BLOCK (attr
)->size
;
19356 retval
.per_cu
= cu
->per_cu
;
19358 age_cached_comp_units ();
19363 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
19366 struct dwarf2_locexpr_baton
19367 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
19368 struct dwarf2_per_cu_data
*per_cu
,
19369 CORE_ADDR (*get_frame_pc
) (void *baton
),
19372 sect_offset offset
= { per_cu
->offset
.sect_off
+ offset_in_cu
.cu_off
};
19374 return dwarf2_fetch_die_loc_sect_off (offset
, per_cu
, get_frame_pc
, baton
);
19377 /* Write a constant of a given type as target-ordered bytes into
19380 static const gdb_byte
*
19381 write_constant_as_bytes (struct obstack
*obstack
,
19382 enum bfd_endian byte_order
,
19389 *len
= TYPE_LENGTH (type
);
19390 result
= obstack_alloc (obstack
, *len
);
19391 store_unsigned_integer (result
, *len
, byte_order
, value
);
19396 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
19397 pointer to the constant bytes and set LEN to the length of the
19398 data. If memory is needed, allocate it on OBSTACK. If the DIE
19399 does not have a DW_AT_const_value, return NULL. */
19402 dwarf2_fetch_constant_bytes (sect_offset offset
,
19403 struct dwarf2_per_cu_data
*per_cu
,
19404 struct obstack
*obstack
,
19407 struct dwarf2_cu
*cu
;
19408 struct die_info
*die
;
19409 struct attribute
*attr
;
19410 const gdb_byte
*result
= NULL
;
19413 enum bfd_endian byte_order
;
19415 dw2_setup (per_cu
->objfile
);
19417 if (per_cu
->cu
== NULL
)
19421 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
19423 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
19424 offset
.sect_off
, objfile_name (per_cu
->objfile
));
19427 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
19431 byte_order
= (bfd_big_endian (per_cu
->objfile
->obfd
)
19432 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
19434 switch (attr
->form
)
19437 case DW_FORM_GNU_addr_index
:
19441 *len
= cu
->header
.addr_size
;
19442 tem
= obstack_alloc (obstack
, *len
);
19443 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
19447 case DW_FORM_string
:
19449 case DW_FORM_GNU_str_index
:
19450 case DW_FORM_GNU_strp_alt
:
19451 /* DW_STRING is already allocated on the objfile obstack, point
19453 result
= (const gdb_byte
*) DW_STRING (attr
);
19454 *len
= strlen (DW_STRING (attr
));
19456 case DW_FORM_block1
:
19457 case DW_FORM_block2
:
19458 case DW_FORM_block4
:
19459 case DW_FORM_block
:
19460 case DW_FORM_exprloc
:
19461 result
= DW_BLOCK (attr
)->data
;
19462 *len
= DW_BLOCK (attr
)->size
;
19465 /* The DW_AT_const_value attributes are supposed to carry the
19466 symbol's value "represented as it would be on the target
19467 architecture." By the time we get here, it's already been
19468 converted to host endianness, so we just need to sign- or
19469 zero-extend it as appropriate. */
19470 case DW_FORM_data1
:
19471 type
= die_type (die
, cu
);
19472 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
19473 if (result
== NULL
)
19474 result
= write_constant_as_bytes (obstack
, byte_order
,
19477 case DW_FORM_data2
:
19478 type
= die_type (die
, cu
);
19479 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
19480 if (result
== NULL
)
19481 result
= write_constant_as_bytes (obstack
, byte_order
,
19484 case DW_FORM_data4
:
19485 type
= die_type (die
, cu
);
19486 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
19487 if (result
== NULL
)
19488 result
= write_constant_as_bytes (obstack
, byte_order
,
19491 case DW_FORM_data8
:
19492 type
= die_type (die
, cu
);
19493 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
19494 if (result
== NULL
)
19495 result
= write_constant_as_bytes (obstack
, byte_order
,
19499 case DW_FORM_sdata
:
19500 type
= die_type (die
, cu
);
19501 result
= write_constant_as_bytes (obstack
, byte_order
,
19502 type
, DW_SND (attr
), len
);
19505 case DW_FORM_udata
:
19506 type
= die_type (die
, cu
);
19507 result
= write_constant_as_bytes (obstack
, byte_order
,
19508 type
, DW_UNSND (attr
), len
);
19512 complaint (&symfile_complaints
,
19513 _("unsupported const value attribute form: '%s'"),
19514 dwarf_form_name (attr
->form
));
19521 /* Return the type of the DIE at DIE_OFFSET in the CU named by
19525 dwarf2_get_die_type (cu_offset die_offset
,
19526 struct dwarf2_per_cu_data
*per_cu
)
19528 sect_offset die_offset_sect
;
19530 dw2_setup (per_cu
->objfile
);
19532 die_offset_sect
.sect_off
= per_cu
->offset
.sect_off
+ die_offset
.cu_off
;
19533 return get_die_type_at_offset (die_offset_sect
, per_cu
);
19536 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
19537 On entry *REF_CU is the CU of SRC_DIE.
19538 On exit *REF_CU is the CU of the result.
19539 Returns NULL if the referenced DIE isn't found. */
19541 static struct die_info
*
19542 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
19543 struct dwarf2_cu
**ref_cu
)
19545 struct objfile
*objfile
= (*ref_cu
)->objfile
;
19546 struct die_info temp_die
;
19547 struct dwarf2_cu
*sig_cu
;
19548 struct die_info
*die
;
19550 /* While it might be nice to assert sig_type->type == NULL here,
19551 we can get here for DW_AT_imported_declaration where we need
19552 the DIE not the type. */
19554 /* If necessary, add it to the queue and load its DIEs. */
19556 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
19557 read_signatured_type (sig_type
);
19559 sig_cu
= sig_type
->per_cu
.cu
;
19560 gdb_assert (sig_cu
!= NULL
);
19561 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
19562 temp_die
.offset
= sig_type
->type_offset_in_section
;
19563 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
19564 temp_die
.offset
.sect_off
);
19567 /* For .gdb_index version 7 keep track of included TUs.
19568 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
19569 if (dwarf2_per_objfile
->index_table
!= NULL
19570 && dwarf2_per_objfile
->index_table
->version
<= 7)
19572 VEC_safe_push (dwarf2_per_cu_ptr
,
19573 (*ref_cu
)->per_cu
->imported_symtabs
,
19584 /* Follow signatured type referenced by ATTR in SRC_DIE.
19585 On entry *REF_CU is the CU of SRC_DIE.
19586 On exit *REF_CU is the CU of the result.
19587 The result is the DIE of the type.
19588 If the referenced type cannot be found an error is thrown. */
19590 static struct die_info
*
19591 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
19592 struct dwarf2_cu
**ref_cu
)
19594 ULONGEST signature
= DW_SIGNATURE (attr
);
19595 struct signatured_type
*sig_type
;
19596 struct die_info
*die
;
19598 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
19600 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
19601 /* sig_type will be NULL if the signatured type is missing from
19603 if (sig_type
== NULL
)
19605 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
19606 " from DIE at 0x%x [in module %s]"),
19607 hex_string (signature
), src_die
->offset
.sect_off
,
19608 objfile_name ((*ref_cu
)->objfile
));
19611 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
19614 dump_die_for_error (src_die
);
19615 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
19616 " from DIE at 0x%x [in module %s]"),
19617 hex_string (signature
), src_die
->offset
.sect_off
,
19618 objfile_name ((*ref_cu
)->objfile
));
19624 /* Get the type specified by SIGNATURE referenced in DIE/CU,
19625 reading in and processing the type unit if necessary. */
19627 static struct type
*
19628 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
19629 struct dwarf2_cu
*cu
)
19631 struct signatured_type
*sig_type
;
19632 struct dwarf2_cu
*type_cu
;
19633 struct die_info
*type_die
;
19636 sig_type
= lookup_signatured_type (cu
, signature
);
19637 /* sig_type will be NULL if the signatured type is missing from
19639 if (sig_type
== NULL
)
19641 complaint (&symfile_complaints
,
19642 _("Dwarf Error: Cannot find signatured DIE %s referenced"
19643 " from DIE at 0x%x [in module %s]"),
19644 hex_string (signature
), die
->offset
.sect_off
,
19645 objfile_name (dwarf2_per_objfile
->objfile
));
19646 return build_error_marker_type (cu
, die
);
19649 /* If we already know the type we're done. */
19650 if (sig_type
->type
!= NULL
)
19651 return sig_type
->type
;
19654 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
19655 if (type_die
!= NULL
)
19657 /* N.B. We need to call get_die_type to ensure only one type for this DIE
19658 is created. This is important, for example, because for c++ classes
19659 we need TYPE_NAME set which is only done by new_symbol. Blech. */
19660 type
= read_type_die (type_die
, type_cu
);
19663 complaint (&symfile_complaints
,
19664 _("Dwarf Error: Cannot build signatured type %s"
19665 " referenced from DIE at 0x%x [in module %s]"),
19666 hex_string (signature
), die
->offset
.sect_off
,
19667 objfile_name (dwarf2_per_objfile
->objfile
));
19668 type
= build_error_marker_type (cu
, die
);
19673 complaint (&symfile_complaints
,
19674 _("Dwarf Error: Problem reading signatured DIE %s referenced"
19675 " from DIE at 0x%x [in module %s]"),
19676 hex_string (signature
), die
->offset
.sect_off
,
19677 objfile_name (dwarf2_per_objfile
->objfile
));
19678 type
= build_error_marker_type (cu
, die
);
19680 sig_type
->type
= type
;
19685 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
19686 reading in and processing the type unit if necessary. */
19688 static struct type
*
19689 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
19690 struct dwarf2_cu
*cu
) /* ARI: editCase function */
19692 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
19693 if (attr_form_is_ref (attr
))
19695 struct dwarf2_cu
*type_cu
= cu
;
19696 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
19698 return read_type_die (type_die
, type_cu
);
19700 else if (attr
->form
== DW_FORM_ref_sig8
)
19702 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
19706 complaint (&symfile_complaints
,
19707 _("Dwarf Error: DW_AT_signature has bad form %s in DIE"
19708 " at 0x%x [in module %s]"),
19709 dwarf_form_name (attr
->form
), die
->offset
.sect_off
,
19710 objfile_name (dwarf2_per_objfile
->objfile
));
19711 return build_error_marker_type (cu
, die
);
19715 /* Load the DIEs associated with type unit PER_CU into memory. */
19718 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
19720 struct signatured_type
*sig_type
;
19722 /* Caller is responsible for ensuring type_unit_groups don't get here. */
19723 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
19725 /* We have the per_cu, but we need the signatured_type.
19726 Fortunately this is an easy translation. */
19727 gdb_assert (per_cu
->is_debug_types
);
19728 sig_type
= (struct signatured_type
*) per_cu
;
19730 gdb_assert (per_cu
->cu
== NULL
);
19732 read_signatured_type (sig_type
);
19734 gdb_assert (per_cu
->cu
!= NULL
);
19737 /* die_reader_func for read_signatured_type.
19738 This is identical to load_full_comp_unit_reader,
19739 but is kept separate for now. */
19742 read_signatured_type_reader (const struct die_reader_specs
*reader
,
19743 const gdb_byte
*info_ptr
,
19744 struct die_info
*comp_unit_die
,
19748 struct dwarf2_cu
*cu
= reader
->cu
;
19750 gdb_assert (cu
->die_hash
== NULL
);
19752 htab_create_alloc_ex (cu
->header
.length
/ 12,
19756 &cu
->comp_unit_obstack
,
19757 hashtab_obstack_allocate
,
19758 dummy_obstack_deallocate
);
19761 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
19762 &info_ptr
, comp_unit_die
);
19763 cu
->dies
= comp_unit_die
;
19764 /* comp_unit_die is not stored in die_hash, no need. */
19766 /* We try not to read any attributes in this function, because not
19767 all CUs needed for references have been loaded yet, and symbol
19768 table processing isn't initialized. But we have to set the CU language,
19769 or we won't be able to build types correctly.
19770 Similarly, if we do not read the producer, we can not apply
19771 producer-specific interpretation. */
19772 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
19775 /* Read in a signatured type and build its CU and DIEs.
19776 If the type is a stub for the real type in a DWO file,
19777 read in the real type from the DWO file as well. */
19780 read_signatured_type (struct signatured_type
*sig_type
)
19782 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
19784 gdb_assert (per_cu
->is_debug_types
);
19785 gdb_assert (per_cu
->cu
== NULL
);
19787 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
19788 read_signatured_type_reader
, NULL
);
19789 sig_type
->per_cu
.tu_read
= 1;
19792 /* Decode simple location descriptions.
19793 Given a pointer to a dwarf block that defines a location, compute
19794 the location and return the value.
19796 NOTE drow/2003-11-18: This function is called in two situations
19797 now: for the address of static or global variables (partial symbols
19798 only) and for offsets into structures which are expected to be
19799 (more or less) constant. The partial symbol case should go away,
19800 and only the constant case should remain. That will let this
19801 function complain more accurately. A few special modes are allowed
19802 without complaint for global variables (for instance, global
19803 register values and thread-local values).
19805 A location description containing no operations indicates that the
19806 object is optimized out. The return value is 0 for that case.
19807 FIXME drow/2003-11-16: No callers check for this case any more; soon all
19808 callers will only want a very basic result and this can become a
19811 Note that stack[0] is unused except as a default error return. */
19814 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
19816 struct objfile
*objfile
= cu
->objfile
;
19818 size_t size
= blk
->size
;
19819 const gdb_byte
*data
= blk
->data
;
19820 CORE_ADDR stack
[64];
19822 unsigned int bytes_read
, unsnd
;
19828 stack
[++stacki
] = 0;
19867 stack
[++stacki
] = op
- DW_OP_lit0
;
19902 stack
[++stacki
] = op
- DW_OP_reg0
;
19904 dwarf2_complex_location_expr_complaint ();
19908 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
19910 stack
[++stacki
] = unsnd
;
19912 dwarf2_complex_location_expr_complaint ();
19916 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
19921 case DW_OP_const1u
:
19922 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
19926 case DW_OP_const1s
:
19927 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
19931 case DW_OP_const2u
:
19932 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
19936 case DW_OP_const2s
:
19937 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
19941 case DW_OP_const4u
:
19942 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
19946 case DW_OP_const4s
:
19947 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
19951 case DW_OP_const8u
:
19952 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
19957 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
19963 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
19968 stack
[stacki
+ 1] = stack
[stacki
];
19973 stack
[stacki
- 1] += stack
[stacki
];
19977 case DW_OP_plus_uconst
:
19978 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
19984 stack
[stacki
- 1] -= stack
[stacki
];
19989 /* If we're not the last op, then we definitely can't encode
19990 this using GDB's address_class enum. This is valid for partial
19991 global symbols, although the variable's address will be bogus
19994 dwarf2_complex_location_expr_complaint ();
19997 case DW_OP_GNU_push_tls_address
:
19998 /* The top of the stack has the offset from the beginning
19999 of the thread control block at which the variable is located. */
20000 /* Nothing should follow this operator, so the top of stack would
20002 /* This is valid for partial global symbols, but the variable's
20003 address will be bogus in the psymtab. Make it always at least
20004 non-zero to not look as a variable garbage collected by linker
20005 which have DW_OP_addr 0. */
20007 dwarf2_complex_location_expr_complaint ();
20011 case DW_OP_GNU_uninit
:
20014 case DW_OP_GNU_addr_index
:
20015 case DW_OP_GNU_const_index
:
20016 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
20023 const char *name
= get_DW_OP_name (op
);
20026 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
20029 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
20033 return (stack
[stacki
]);
20036 /* Enforce maximum stack depth of SIZE-1 to avoid writing
20037 outside of the allocated space. Also enforce minimum>0. */
20038 if (stacki
>= ARRAY_SIZE (stack
) - 1)
20040 complaint (&symfile_complaints
,
20041 _("location description stack overflow"));
20047 complaint (&symfile_complaints
,
20048 _("location description stack underflow"));
20052 return (stack
[stacki
]);
20055 /* memory allocation interface */
20057 static struct dwarf_block
*
20058 dwarf_alloc_block (struct dwarf2_cu
*cu
)
20060 struct dwarf_block
*blk
;
20062 blk
= (struct dwarf_block
*)
20063 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
20067 static struct die_info
*
20068 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
20070 struct die_info
*die
;
20071 size_t size
= sizeof (struct die_info
);
20074 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
20076 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
20077 memset (die
, 0, sizeof (struct die_info
));
20082 /* Macro support. */
20084 /* Return file name relative to the compilation directory of file number I in
20085 *LH's file name table. The result is allocated using xmalloc; the caller is
20086 responsible for freeing it. */
20089 file_file_name (int file
, struct line_header
*lh
)
20091 /* Is the file number a valid index into the line header's file name
20092 table? Remember that file numbers start with one, not zero. */
20093 if (1 <= file
&& file
<= lh
->num_file_names
)
20095 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
20097 if (IS_ABSOLUTE_PATH (fe
->name
) || fe
->dir_index
== 0)
20098 return xstrdup (fe
->name
);
20099 return concat (lh
->include_dirs
[fe
->dir_index
- 1], SLASH_STRING
,
20104 /* The compiler produced a bogus file number. We can at least
20105 record the macro definitions made in the file, even if we
20106 won't be able to find the file by name. */
20107 char fake_name
[80];
20109 xsnprintf (fake_name
, sizeof (fake_name
),
20110 "<bad macro file number %d>", file
);
20112 complaint (&symfile_complaints
,
20113 _("bad file number in macro information (%d)"),
20116 return xstrdup (fake_name
);
20120 /* Return the full name of file number I in *LH's file name table.
20121 Use COMP_DIR as the name of the current directory of the
20122 compilation. The result is allocated using xmalloc; the caller is
20123 responsible for freeing it. */
20125 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
20127 /* Is the file number a valid index into the line header's file name
20128 table? Remember that file numbers start with one, not zero. */
20129 if (1 <= file
&& file
<= lh
->num_file_names
)
20131 char *relative
= file_file_name (file
, lh
);
20133 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
20135 return reconcat (relative
, comp_dir
, SLASH_STRING
, relative
, NULL
);
20138 return file_file_name (file
, lh
);
20142 static struct macro_source_file
*
20143 macro_start_file (int file
, int line
,
20144 struct macro_source_file
*current_file
,
20145 const char *comp_dir
,
20146 struct line_header
*lh
, struct objfile
*objfile
)
20148 /* File name relative to the compilation directory of this source file. */
20149 char *file_name
= file_file_name (file
, lh
);
20151 if (! current_file
)
20153 /* Note: We don't create a macro table for this compilation unit
20154 at all until we actually get a filename. */
20155 struct macro_table
*macro_table
= get_macro_table (objfile
, comp_dir
);
20157 /* If we have no current file, then this must be the start_file
20158 directive for the compilation unit's main source file. */
20159 current_file
= macro_set_main (macro_table
, file_name
);
20160 macro_define_special (macro_table
);
20163 current_file
= macro_include (current_file
, line
, file_name
);
20167 return current_file
;
20171 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
20172 followed by a null byte. */
20174 copy_string (const char *buf
, int len
)
20176 char *s
= xmalloc (len
+ 1);
20178 memcpy (s
, buf
, len
);
20184 static const char *
20185 consume_improper_spaces (const char *p
, const char *body
)
20189 complaint (&symfile_complaints
,
20190 _("macro definition contains spaces "
20191 "in formal argument list:\n`%s'"),
20203 parse_macro_definition (struct macro_source_file
*file
, int line
,
20208 /* The body string takes one of two forms. For object-like macro
20209 definitions, it should be:
20211 <macro name> " " <definition>
20213 For function-like macro definitions, it should be:
20215 <macro name> "() " <definition>
20217 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
20219 Spaces may appear only where explicitly indicated, and in the
20222 The Dwarf 2 spec says that an object-like macro's name is always
20223 followed by a space, but versions of GCC around March 2002 omit
20224 the space when the macro's definition is the empty string.
20226 The Dwarf 2 spec says that there should be no spaces between the
20227 formal arguments in a function-like macro's formal argument list,
20228 but versions of GCC around March 2002 include spaces after the
20232 /* Find the extent of the macro name. The macro name is terminated
20233 by either a space or null character (for an object-like macro) or
20234 an opening paren (for a function-like macro). */
20235 for (p
= body
; *p
; p
++)
20236 if (*p
== ' ' || *p
== '(')
20239 if (*p
== ' ' || *p
== '\0')
20241 /* It's an object-like macro. */
20242 int name_len
= p
- body
;
20243 char *name
= copy_string (body
, name_len
);
20244 const char *replacement
;
20247 replacement
= body
+ name_len
+ 1;
20250 dwarf2_macro_malformed_definition_complaint (body
);
20251 replacement
= body
+ name_len
;
20254 macro_define_object (file
, line
, name
, replacement
);
20258 else if (*p
== '(')
20260 /* It's a function-like macro. */
20261 char *name
= copy_string (body
, p
- body
);
20264 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
20268 p
= consume_improper_spaces (p
, body
);
20270 /* Parse the formal argument list. */
20271 while (*p
&& *p
!= ')')
20273 /* Find the extent of the current argument name. */
20274 const char *arg_start
= p
;
20276 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
20279 if (! *p
|| p
== arg_start
)
20280 dwarf2_macro_malformed_definition_complaint (body
);
20283 /* Make sure argv has room for the new argument. */
20284 if (argc
>= argv_size
)
20287 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
20290 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
20293 p
= consume_improper_spaces (p
, body
);
20295 /* Consume the comma, if present. */
20300 p
= consume_improper_spaces (p
, body
);
20309 /* Perfectly formed definition, no complaints. */
20310 macro_define_function (file
, line
, name
,
20311 argc
, (const char **) argv
,
20313 else if (*p
== '\0')
20315 /* Complain, but do define it. */
20316 dwarf2_macro_malformed_definition_complaint (body
);
20317 macro_define_function (file
, line
, name
,
20318 argc
, (const char **) argv
,
20322 /* Just complain. */
20323 dwarf2_macro_malformed_definition_complaint (body
);
20326 /* Just complain. */
20327 dwarf2_macro_malformed_definition_complaint (body
);
20333 for (i
= 0; i
< argc
; i
++)
20339 dwarf2_macro_malformed_definition_complaint (body
);
20342 /* Skip some bytes from BYTES according to the form given in FORM.
20343 Returns the new pointer. */
20345 static const gdb_byte
*
20346 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
20347 enum dwarf_form form
,
20348 unsigned int offset_size
,
20349 struct dwarf2_section_info
*section
)
20351 unsigned int bytes_read
;
20355 case DW_FORM_data1
:
20360 case DW_FORM_data2
:
20364 case DW_FORM_data4
:
20368 case DW_FORM_data8
:
20372 case DW_FORM_string
:
20373 read_direct_string (abfd
, bytes
, &bytes_read
);
20374 bytes
+= bytes_read
;
20377 case DW_FORM_sec_offset
:
20379 case DW_FORM_GNU_strp_alt
:
20380 bytes
+= offset_size
;
20383 case DW_FORM_block
:
20384 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
20385 bytes
+= bytes_read
;
20388 case DW_FORM_block1
:
20389 bytes
+= 1 + read_1_byte (abfd
, bytes
);
20391 case DW_FORM_block2
:
20392 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
20394 case DW_FORM_block4
:
20395 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
20398 case DW_FORM_sdata
:
20399 case DW_FORM_udata
:
20400 case DW_FORM_GNU_addr_index
:
20401 case DW_FORM_GNU_str_index
:
20402 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
20405 dwarf2_section_buffer_overflow_complaint (section
);
20413 complaint (&symfile_complaints
,
20414 _("invalid form 0x%x in `%s'"),
20415 form
, get_section_name (section
));
20423 /* A helper for dwarf_decode_macros that handles skipping an unknown
20424 opcode. Returns an updated pointer to the macro data buffer; or,
20425 on error, issues a complaint and returns NULL. */
20427 static const gdb_byte
*
20428 skip_unknown_opcode (unsigned int opcode
,
20429 const gdb_byte
**opcode_definitions
,
20430 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
20432 unsigned int offset_size
,
20433 struct dwarf2_section_info
*section
)
20435 unsigned int bytes_read
, i
;
20437 const gdb_byte
*defn
;
20439 if (opcode_definitions
[opcode
] == NULL
)
20441 complaint (&symfile_complaints
,
20442 _("unrecognized DW_MACFINO opcode 0x%x"),
20447 defn
= opcode_definitions
[opcode
];
20448 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
20449 defn
+= bytes_read
;
20451 for (i
= 0; i
< arg
; ++i
)
20453 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
, defn
[i
], offset_size
,
20455 if (mac_ptr
== NULL
)
20457 /* skip_form_bytes already issued the complaint. */
20465 /* A helper function which parses the header of a macro section.
20466 If the macro section is the extended (for now called "GNU") type,
20467 then this updates *OFFSET_SIZE. Returns a pointer to just after
20468 the header, or issues a complaint and returns NULL on error. */
20470 static const gdb_byte
*
20471 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
20473 const gdb_byte
*mac_ptr
,
20474 unsigned int *offset_size
,
20475 int section_is_gnu
)
20477 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
20479 if (section_is_gnu
)
20481 unsigned int version
, flags
;
20483 version
= read_2_bytes (abfd
, mac_ptr
);
20486 complaint (&symfile_complaints
,
20487 _("unrecognized version `%d' in .debug_macro section"),
20493 flags
= read_1_byte (abfd
, mac_ptr
);
20495 *offset_size
= (flags
& 1) ? 8 : 4;
20497 if ((flags
& 2) != 0)
20498 /* We don't need the line table offset. */
20499 mac_ptr
+= *offset_size
;
20501 /* Vendor opcode descriptions. */
20502 if ((flags
& 4) != 0)
20504 unsigned int i
, count
;
20506 count
= read_1_byte (abfd
, mac_ptr
);
20508 for (i
= 0; i
< count
; ++i
)
20510 unsigned int opcode
, bytes_read
;
20513 opcode
= read_1_byte (abfd
, mac_ptr
);
20515 opcode_definitions
[opcode
] = mac_ptr
;
20516 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
20517 mac_ptr
+= bytes_read
;
20526 /* A helper for dwarf_decode_macros that handles the GNU extensions,
20527 including DW_MACRO_GNU_transparent_include. */
20530 dwarf_decode_macro_bytes (bfd
*abfd
,
20531 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
20532 struct macro_source_file
*current_file
,
20533 struct line_header
*lh
, const char *comp_dir
,
20534 struct dwarf2_section_info
*section
,
20535 int section_is_gnu
, int section_is_dwz
,
20536 unsigned int offset_size
,
20537 struct objfile
*objfile
,
20538 htab_t include_hash
)
20540 enum dwarf_macro_record_type macinfo_type
;
20541 int at_commandline
;
20542 const gdb_byte
*opcode_definitions
[256];
20544 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
20545 &offset_size
, section_is_gnu
);
20546 if (mac_ptr
== NULL
)
20548 /* We already issued a complaint. */
20552 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
20553 GDB is still reading the definitions from command line. First
20554 DW_MACINFO_start_file will need to be ignored as it was already executed
20555 to create CURRENT_FILE for the main source holding also the command line
20556 definitions. On first met DW_MACINFO_start_file this flag is reset to
20557 normally execute all the remaining DW_MACINFO_start_file macinfos. */
20559 at_commandline
= 1;
20563 /* Do we at least have room for a macinfo type byte? */
20564 if (mac_ptr
>= mac_end
)
20566 dwarf2_section_buffer_overflow_complaint (section
);
20570 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
20573 /* Note that we rely on the fact that the corresponding GNU and
20574 DWARF constants are the same. */
20575 switch (macinfo_type
)
20577 /* A zero macinfo type indicates the end of the macro
20582 case DW_MACRO_GNU_define
:
20583 case DW_MACRO_GNU_undef
:
20584 case DW_MACRO_GNU_define_indirect
:
20585 case DW_MACRO_GNU_undef_indirect
:
20586 case DW_MACRO_GNU_define_indirect_alt
:
20587 case DW_MACRO_GNU_undef_indirect_alt
:
20589 unsigned int bytes_read
;
20594 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
20595 mac_ptr
+= bytes_read
;
20597 if (macinfo_type
== DW_MACRO_GNU_define
20598 || macinfo_type
== DW_MACRO_GNU_undef
)
20600 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
20601 mac_ptr
+= bytes_read
;
20605 LONGEST str_offset
;
20607 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
20608 mac_ptr
+= offset_size
;
20610 if (macinfo_type
== DW_MACRO_GNU_define_indirect_alt
20611 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
20614 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
20616 body
= read_indirect_string_from_dwz (dwz
, str_offset
);
20619 body
= read_indirect_string_at_offset (abfd
, str_offset
);
20622 is_define
= (macinfo_type
== DW_MACRO_GNU_define
20623 || macinfo_type
== DW_MACRO_GNU_define_indirect
20624 || macinfo_type
== DW_MACRO_GNU_define_indirect_alt
);
20625 if (! current_file
)
20627 /* DWARF violation as no main source is present. */
20628 complaint (&symfile_complaints
,
20629 _("debug info with no main source gives macro %s "
20631 is_define
? _("definition") : _("undefinition"),
20635 if ((line
== 0 && !at_commandline
)
20636 || (line
!= 0 && at_commandline
))
20637 complaint (&symfile_complaints
,
20638 _("debug info gives %s macro %s with %s line %d: %s"),
20639 at_commandline
? _("command-line") : _("in-file"),
20640 is_define
? _("definition") : _("undefinition"),
20641 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
20644 parse_macro_definition (current_file
, line
, body
);
20647 gdb_assert (macinfo_type
== DW_MACRO_GNU_undef
20648 || macinfo_type
== DW_MACRO_GNU_undef_indirect
20649 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
);
20650 macro_undef (current_file
, line
, body
);
20655 case DW_MACRO_GNU_start_file
:
20657 unsigned int bytes_read
;
20660 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
20661 mac_ptr
+= bytes_read
;
20662 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
20663 mac_ptr
+= bytes_read
;
20665 if ((line
== 0 && !at_commandline
)
20666 || (line
!= 0 && at_commandline
))
20667 complaint (&symfile_complaints
,
20668 _("debug info gives source %d included "
20669 "from %s at %s line %d"),
20670 file
, at_commandline
? _("command-line") : _("file"),
20671 line
== 0 ? _("zero") : _("non-zero"), line
);
20673 if (at_commandline
)
20675 /* This DW_MACRO_GNU_start_file was executed in the
20677 at_commandline
= 0;
20680 current_file
= macro_start_file (file
, line
,
20681 current_file
, comp_dir
,
20686 case DW_MACRO_GNU_end_file
:
20687 if (! current_file
)
20688 complaint (&symfile_complaints
,
20689 _("macro debug info has an unmatched "
20690 "`close_file' directive"));
20693 current_file
= current_file
->included_by
;
20694 if (! current_file
)
20696 enum dwarf_macro_record_type next_type
;
20698 /* GCC circa March 2002 doesn't produce the zero
20699 type byte marking the end of the compilation
20700 unit. Complain if it's not there, but exit no
20703 /* Do we at least have room for a macinfo type byte? */
20704 if (mac_ptr
>= mac_end
)
20706 dwarf2_section_buffer_overflow_complaint (section
);
20710 /* We don't increment mac_ptr here, so this is just
20712 next_type
= read_1_byte (abfd
, mac_ptr
);
20713 if (next_type
!= 0)
20714 complaint (&symfile_complaints
,
20715 _("no terminating 0-type entry for "
20716 "macros in `.debug_macinfo' section"));
20723 case DW_MACRO_GNU_transparent_include
:
20724 case DW_MACRO_GNU_transparent_include_alt
:
20728 bfd
*include_bfd
= abfd
;
20729 struct dwarf2_section_info
*include_section
= section
;
20730 struct dwarf2_section_info alt_section
;
20731 const gdb_byte
*include_mac_end
= mac_end
;
20732 int is_dwz
= section_is_dwz
;
20733 const gdb_byte
*new_mac_ptr
;
20735 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
20736 mac_ptr
+= offset_size
;
20738 if (macinfo_type
== DW_MACRO_GNU_transparent_include_alt
)
20740 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
20742 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
20745 include_section
= &dwz
->macro
;
20746 include_bfd
= get_section_bfd_owner (include_section
);
20747 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
20751 new_mac_ptr
= include_section
->buffer
+ offset
;
20752 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
20756 /* This has actually happened; see
20757 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
20758 complaint (&symfile_complaints
,
20759 _("recursive DW_MACRO_GNU_transparent_include in "
20760 ".debug_macro section"));
20764 *slot
= (void *) new_mac_ptr
;
20766 dwarf_decode_macro_bytes (include_bfd
, new_mac_ptr
,
20767 include_mac_end
, current_file
,
20769 section
, section_is_gnu
, is_dwz
,
20770 offset_size
, objfile
, include_hash
);
20772 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
20777 case DW_MACINFO_vendor_ext
:
20778 if (!section_is_gnu
)
20780 unsigned int bytes_read
;
20783 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
20784 mac_ptr
+= bytes_read
;
20785 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
20786 mac_ptr
+= bytes_read
;
20788 /* We don't recognize any vendor extensions. */
20794 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
20795 mac_ptr
, mac_end
, abfd
, offset_size
,
20797 if (mac_ptr
== NULL
)
20801 } while (macinfo_type
!= 0);
20805 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
20806 const char *comp_dir
, int section_is_gnu
)
20808 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
20809 struct line_header
*lh
= cu
->line_header
;
20811 const gdb_byte
*mac_ptr
, *mac_end
;
20812 struct macro_source_file
*current_file
= 0;
20813 enum dwarf_macro_record_type macinfo_type
;
20814 unsigned int offset_size
= cu
->header
.offset_size
;
20815 const gdb_byte
*opcode_definitions
[256];
20816 struct cleanup
*cleanup
;
20817 htab_t include_hash
;
20819 struct dwarf2_section_info
*section
;
20820 const char *section_name
;
20822 if (cu
->dwo_unit
!= NULL
)
20824 if (section_is_gnu
)
20826 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
20827 section_name
= ".debug_macro.dwo";
20831 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
20832 section_name
= ".debug_macinfo.dwo";
20837 if (section_is_gnu
)
20839 section
= &dwarf2_per_objfile
->macro
;
20840 section_name
= ".debug_macro";
20844 section
= &dwarf2_per_objfile
->macinfo
;
20845 section_name
= ".debug_macinfo";
20849 dwarf2_read_section (objfile
, section
);
20850 if (section
->buffer
== NULL
)
20852 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
20855 abfd
= get_section_bfd_owner (section
);
20857 /* First pass: Find the name of the base filename.
20858 This filename is needed in order to process all macros whose definition
20859 (or undefinition) comes from the command line. These macros are defined
20860 before the first DW_MACINFO_start_file entry, and yet still need to be
20861 associated to the base file.
20863 To determine the base file name, we scan the macro definitions until we
20864 reach the first DW_MACINFO_start_file entry. We then initialize
20865 CURRENT_FILE accordingly so that any macro definition found before the
20866 first DW_MACINFO_start_file can still be associated to the base file. */
20868 mac_ptr
= section
->buffer
+ offset
;
20869 mac_end
= section
->buffer
+ section
->size
;
20871 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
20872 &offset_size
, section_is_gnu
);
20873 if (mac_ptr
== NULL
)
20875 /* We already issued a complaint. */
20881 /* Do we at least have room for a macinfo type byte? */
20882 if (mac_ptr
>= mac_end
)
20884 /* Complaint is printed during the second pass as GDB will probably
20885 stop the first pass earlier upon finding
20886 DW_MACINFO_start_file. */
20890 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
20893 /* Note that we rely on the fact that the corresponding GNU and
20894 DWARF constants are the same. */
20895 switch (macinfo_type
)
20897 /* A zero macinfo type indicates the end of the macro
20902 case DW_MACRO_GNU_define
:
20903 case DW_MACRO_GNU_undef
:
20904 /* Only skip the data by MAC_PTR. */
20906 unsigned int bytes_read
;
20908 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
20909 mac_ptr
+= bytes_read
;
20910 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
20911 mac_ptr
+= bytes_read
;
20915 case DW_MACRO_GNU_start_file
:
20917 unsigned int bytes_read
;
20920 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
20921 mac_ptr
+= bytes_read
;
20922 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
20923 mac_ptr
+= bytes_read
;
20925 current_file
= macro_start_file (file
, line
, current_file
,
20926 comp_dir
, lh
, objfile
);
20930 case DW_MACRO_GNU_end_file
:
20931 /* No data to skip by MAC_PTR. */
20934 case DW_MACRO_GNU_define_indirect
:
20935 case DW_MACRO_GNU_undef_indirect
:
20936 case DW_MACRO_GNU_define_indirect_alt
:
20937 case DW_MACRO_GNU_undef_indirect_alt
:
20939 unsigned int bytes_read
;
20941 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
20942 mac_ptr
+= bytes_read
;
20943 mac_ptr
+= offset_size
;
20947 case DW_MACRO_GNU_transparent_include
:
20948 case DW_MACRO_GNU_transparent_include_alt
:
20949 /* Note that, according to the spec, a transparent include
20950 chain cannot call DW_MACRO_GNU_start_file. So, we can just
20951 skip this opcode. */
20952 mac_ptr
+= offset_size
;
20955 case DW_MACINFO_vendor_ext
:
20956 /* Only skip the data by MAC_PTR. */
20957 if (!section_is_gnu
)
20959 unsigned int bytes_read
;
20961 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
20962 mac_ptr
+= bytes_read
;
20963 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
20964 mac_ptr
+= bytes_read
;
20969 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
20970 mac_ptr
, mac_end
, abfd
, offset_size
,
20972 if (mac_ptr
== NULL
)
20976 } while (macinfo_type
!= 0 && current_file
== NULL
);
20978 /* Second pass: Process all entries.
20980 Use the AT_COMMAND_LINE flag to determine whether we are still processing
20981 command-line macro definitions/undefinitions. This flag is unset when we
20982 reach the first DW_MACINFO_start_file entry. */
20984 include_hash
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
20985 NULL
, xcalloc
, xfree
);
20986 cleanup
= make_cleanup_htab_delete (include_hash
);
20987 mac_ptr
= section
->buffer
+ offset
;
20988 slot
= htab_find_slot (include_hash
, mac_ptr
, INSERT
);
20989 *slot
= (void *) mac_ptr
;
20990 dwarf_decode_macro_bytes (abfd
, mac_ptr
, mac_end
,
20991 current_file
, lh
, comp_dir
, section
,
20993 offset_size
, objfile
, include_hash
);
20994 do_cleanups (cleanup
);
20997 /* Check if the attribute's form is a DW_FORM_block*
20998 if so return true else false. */
21001 attr_form_is_block (const struct attribute
*attr
)
21003 return (attr
== NULL
? 0 :
21004 attr
->form
== DW_FORM_block1
21005 || attr
->form
== DW_FORM_block2
21006 || attr
->form
== DW_FORM_block4
21007 || attr
->form
== DW_FORM_block
21008 || attr
->form
== DW_FORM_exprloc
);
21011 /* Return non-zero if ATTR's value is a section offset --- classes
21012 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
21013 You may use DW_UNSND (attr) to retrieve such offsets.
21015 Section 7.5.4, "Attribute Encodings", explains that no attribute
21016 may have a value that belongs to more than one of these classes; it
21017 would be ambiguous if we did, because we use the same forms for all
21021 attr_form_is_section_offset (const struct attribute
*attr
)
21023 return (attr
->form
== DW_FORM_data4
21024 || attr
->form
== DW_FORM_data8
21025 || attr
->form
== DW_FORM_sec_offset
);
21028 /* Return non-zero if ATTR's value falls in the 'constant' class, or
21029 zero otherwise. When this function returns true, you can apply
21030 dwarf2_get_attr_constant_value to it.
21032 However, note that for some attributes you must check
21033 attr_form_is_section_offset before using this test. DW_FORM_data4
21034 and DW_FORM_data8 are members of both the constant class, and of
21035 the classes that contain offsets into other debug sections
21036 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
21037 that, if an attribute's can be either a constant or one of the
21038 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
21039 taken as section offsets, not constants. */
21042 attr_form_is_constant (const struct attribute
*attr
)
21044 switch (attr
->form
)
21046 case DW_FORM_sdata
:
21047 case DW_FORM_udata
:
21048 case DW_FORM_data1
:
21049 case DW_FORM_data2
:
21050 case DW_FORM_data4
:
21051 case DW_FORM_data8
:
21059 /* DW_ADDR is always stored already as sect_offset; despite for the forms
21060 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
21063 attr_form_is_ref (const struct attribute
*attr
)
21065 switch (attr
->form
)
21067 case DW_FORM_ref_addr
:
21072 case DW_FORM_ref_udata
:
21073 case DW_FORM_GNU_ref_alt
:
21080 /* Return the .debug_loc section to use for CU.
21081 For DWO files use .debug_loc.dwo. */
21083 static struct dwarf2_section_info
*
21084 cu_debug_loc_section (struct dwarf2_cu
*cu
)
21087 return &cu
->dwo_unit
->dwo_file
->sections
.loc
;
21088 return &dwarf2_per_objfile
->loc
;
21091 /* A helper function that fills in a dwarf2_loclist_baton. */
21094 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
21095 struct dwarf2_loclist_baton
*baton
,
21096 const struct attribute
*attr
)
21098 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
21100 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
21102 baton
->per_cu
= cu
->per_cu
;
21103 gdb_assert (baton
->per_cu
);
21104 /* We don't know how long the location list is, but make sure we
21105 don't run off the edge of the section. */
21106 baton
->size
= section
->size
- DW_UNSND (attr
);
21107 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
21108 baton
->base_address
= cu
->base_address
;
21109 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
21113 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
21114 struct dwarf2_cu
*cu
, int is_block
)
21116 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21117 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
21119 if (attr_form_is_section_offset (attr
)
21120 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
21121 the section. If so, fall through to the complaint in the
21123 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
21125 struct dwarf2_loclist_baton
*baton
;
21127 baton
= obstack_alloc (&objfile
->objfile_obstack
,
21128 sizeof (struct dwarf2_loclist_baton
));
21130 fill_in_loclist_baton (cu
, baton
, attr
);
21132 if (cu
->base_known
== 0)
21133 complaint (&symfile_complaints
,
21134 _("Location list used without "
21135 "specifying the CU base address."));
21137 SYMBOL_ACLASS_INDEX (sym
) = (is_block
21138 ? dwarf2_loclist_block_index
21139 : dwarf2_loclist_index
);
21140 SYMBOL_LOCATION_BATON (sym
) = baton
;
21144 struct dwarf2_locexpr_baton
*baton
;
21146 baton
= obstack_alloc (&objfile
->objfile_obstack
,
21147 sizeof (struct dwarf2_locexpr_baton
));
21148 baton
->per_cu
= cu
->per_cu
;
21149 gdb_assert (baton
->per_cu
);
21151 if (attr_form_is_block (attr
))
21153 /* Note that we're just copying the block's data pointer
21154 here, not the actual data. We're still pointing into the
21155 info_buffer for SYM's objfile; right now we never release
21156 that buffer, but when we do clean up properly this may
21158 baton
->size
= DW_BLOCK (attr
)->size
;
21159 baton
->data
= DW_BLOCK (attr
)->data
;
21163 dwarf2_invalid_attrib_class_complaint ("location description",
21164 SYMBOL_NATURAL_NAME (sym
));
21168 SYMBOL_ACLASS_INDEX (sym
) = (is_block
21169 ? dwarf2_locexpr_block_index
21170 : dwarf2_locexpr_index
);
21171 SYMBOL_LOCATION_BATON (sym
) = baton
;
21175 /* Return the OBJFILE associated with the compilation unit CU. If CU
21176 came from a separate debuginfo file, then the master objfile is
21180 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
21182 struct objfile
*objfile
= per_cu
->objfile
;
21184 /* Return the master objfile, so that we can report and look up the
21185 correct file containing this variable. */
21186 if (objfile
->separate_debug_objfile_backlink
)
21187 objfile
= objfile
->separate_debug_objfile_backlink
;
21192 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
21193 (CU_HEADERP is unused in such case) or prepare a temporary copy at
21194 CU_HEADERP first. */
21196 static const struct comp_unit_head
*
21197 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
21198 struct dwarf2_per_cu_data
*per_cu
)
21200 const gdb_byte
*info_ptr
;
21203 return &per_cu
->cu
->header
;
21205 info_ptr
= per_cu
->section
->buffer
+ per_cu
->offset
.sect_off
;
21207 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
21208 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->objfile
->obfd
);
21213 /* Return the address size given in the compilation unit header for CU. */
21216 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
21218 struct comp_unit_head cu_header_local
;
21219 const struct comp_unit_head
*cu_headerp
;
21221 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21223 return cu_headerp
->addr_size
;
21226 /* Return the offset size given in the compilation unit header for CU. */
21229 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
21231 struct comp_unit_head cu_header_local
;
21232 const struct comp_unit_head
*cu_headerp
;
21234 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21236 return cu_headerp
->offset_size
;
21239 /* See its dwarf2loc.h declaration. */
21242 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
21244 struct comp_unit_head cu_header_local
;
21245 const struct comp_unit_head
*cu_headerp
;
21247 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21249 if (cu_headerp
->version
== 2)
21250 return cu_headerp
->addr_size
;
21252 return cu_headerp
->offset_size
;
21255 /* Return the text offset of the CU. The returned offset comes from
21256 this CU's objfile. If this objfile came from a separate debuginfo
21257 file, then the offset may be different from the corresponding
21258 offset in the parent objfile. */
21261 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
21263 struct objfile
*objfile
= per_cu
->objfile
;
21265 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
21268 /* Locate the .debug_info compilation unit from CU's objfile which contains
21269 the DIE at OFFSET. Raises an error on failure. */
21271 static struct dwarf2_per_cu_data
*
21272 dwarf2_find_containing_comp_unit (sect_offset offset
,
21273 unsigned int offset_in_dwz
,
21274 struct objfile
*objfile
)
21276 struct dwarf2_per_cu_data
*this_cu
;
21278 const sect_offset
*cu_off
;
21281 high
= dwarf2_per_objfile
->n_comp_units
- 1;
21284 struct dwarf2_per_cu_data
*mid_cu
;
21285 int mid
= low
+ (high
- low
) / 2;
21287 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
21288 cu_off
= &mid_cu
->offset
;
21289 if (mid_cu
->is_dwz
> offset_in_dwz
21290 || (mid_cu
->is_dwz
== offset_in_dwz
21291 && cu_off
->sect_off
>= offset
.sect_off
))
21296 gdb_assert (low
== high
);
21297 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
21298 cu_off
= &this_cu
->offset
;
21299 if (this_cu
->is_dwz
!= offset_in_dwz
|| cu_off
->sect_off
> offset
.sect_off
)
21301 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
21302 error (_("Dwarf Error: could not find partial DIE containing "
21303 "offset 0x%lx [in module %s]"),
21304 (long) offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
21306 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
.sect_off
21307 <= offset
.sect_off
);
21308 return dwarf2_per_objfile
->all_comp_units
[low
-1];
21312 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
21313 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
21314 && offset
.sect_off
>= this_cu
->offset
.sect_off
+ this_cu
->length
)
21315 error (_("invalid dwarf2 offset %u"), offset
.sect_off
);
21316 gdb_assert (offset
.sect_off
< this_cu
->offset
.sect_off
+ this_cu
->length
);
21321 /* Initialize dwarf2_cu CU, owned by PER_CU. */
21324 init_one_comp_unit (struct dwarf2_cu
*cu
, struct dwarf2_per_cu_data
*per_cu
)
21326 memset (cu
, 0, sizeof (*cu
));
21328 cu
->per_cu
= per_cu
;
21329 cu
->objfile
= per_cu
->objfile
;
21330 obstack_init (&cu
->comp_unit_obstack
);
21333 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
21336 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
21337 enum language pretend_language
)
21339 struct attribute
*attr
;
21341 /* Set the language we're debugging. */
21342 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
21344 set_cu_language (DW_UNSND (attr
), cu
);
21347 cu
->language
= pretend_language
;
21348 cu
->language_defn
= language_def (cu
->language
);
21351 attr
= dwarf2_attr (comp_unit_die
, DW_AT_producer
, cu
);
21353 cu
->producer
= DW_STRING (attr
);
21356 /* Release one cached compilation unit, CU. We unlink it from the tree
21357 of compilation units, but we don't remove it from the read_in_chain;
21358 the caller is responsible for that.
21359 NOTE: DATA is a void * because this function is also used as a
21360 cleanup routine. */
21363 free_heap_comp_unit (void *data
)
21365 struct dwarf2_cu
*cu
= data
;
21367 gdb_assert (cu
->per_cu
!= NULL
);
21368 cu
->per_cu
->cu
= NULL
;
21371 obstack_free (&cu
->comp_unit_obstack
, NULL
);
21376 /* This cleanup function is passed the address of a dwarf2_cu on the stack
21377 when we're finished with it. We can't free the pointer itself, but be
21378 sure to unlink it from the cache. Also release any associated storage. */
21381 free_stack_comp_unit (void *data
)
21383 struct dwarf2_cu
*cu
= data
;
21385 gdb_assert (cu
->per_cu
!= NULL
);
21386 cu
->per_cu
->cu
= NULL
;
21389 obstack_free (&cu
->comp_unit_obstack
, NULL
);
21390 cu
->partial_dies
= NULL
;
21393 /* Free all cached compilation units. */
21396 free_cached_comp_units (void *data
)
21398 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
21400 per_cu
= dwarf2_per_objfile
->read_in_chain
;
21401 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
21402 while (per_cu
!= NULL
)
21404 struct dwarf2_per_cu_data
*next_cu
;
21406 next_cu
= per_cu
->cu
->read_in_chain
;
21408 free_heap_comp_unit (per_cu
->cu
);
21409 *last_chain
= next_cu
;
21415 /* Increase the age counter on each cached compilation unit, and free
21416 any that are too old. */
21419 age_cached_comp_units (void)
21421 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
21423 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
21424 per_cu
= dwarf2_per_objfile
->read_in_chain
;
21425 while (per_cu
!= NULL
)
21427 per_cu
->cu
->last_used
++;
21428 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
21429 dwarf2_mark (per_cu
->cu
);
21430 per_cu
= per_cu
->cu
->read_in_chain
;
21433 per_cu
= dwarf2_per_objfile
->read_in_chain
;
21434 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
21435 while (per_cu
!= NULL
)
21437 struct dwarf2_per_cu_data
*next_cu
;
21439 next_cu
= per_cu
->cu
->read_in_chain
;
21441 if (!per_cu
->cu
->mark
)
21443 free_heap_comp_unit (per_cu
->cu
);
21444 *last_chain
= next_cu
;
21447 last_chain
= &per_cu
->cu
->read_in_chain
;
21453 /* Remove a single compilation unit from the cache. */
21456 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
21458 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
21460 per_cu
= dwarf2_per_objfile
->read_in_chain
;
21461 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
21462 while (per_cu
!= NULL
)
21464 struct dwarf2_per_cu_data
*next_cu
;
21466 next_cu
= per_cu
->cu
->read_in_chain
;
21468 if (per_cu
== target_per_cu
)
21470 free_heap_comp_unit (per_cu
->cu
);
21472 *last_chain
= next_cu
;
21476 last_chain
= &per_cu
->cu
->read_in_chain
;
21482 /* Release all extra memory associated with OBJFILE. */
21485 dwarf2_free_objfile (struct objfile
*objfile
)
21487 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
21489 if (dwarf2_per_objfile
== NULL
)
21492 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
21493 free_cached_comp_units (NULL
);
21495 if (dwarf2_per_objfile
->quick_file_names_table
)
21496 htab_delete (dwarf2_per_objfile
->quick_file_names_table
);
21498 /* Everything else should be on the objfile obstack. */
21501 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
21502 We store these in a hash table separate from the DIEs, and preserve them
21503 when the DIEs are flushed out of cache.
21505 The CU "per_cu" pointer is needed because offset alone is not enough to
21506 uniquely identify the type. A file may have multiple .debug_types sections,
21507 or the type may come from a DWO file. Furthermore, while it's more logical
21508 to use per_cu->section+offset, with Fission the section with the data is in
21509 the DWO file but we don't know that section at the point we need it.
21510 We have to use something in dwarf2_per_cu_data (or the pointer to it)
21511 because we can enter the lookup routine, get_die_type_at_offset, from
21512 outside this file, and thus won't necessarily have PER_CU->cu.
21513 Fortunately, PER_CU is stable for the life of the objfile. */
21515 struct dwarf2_per_cu_offset_and_type
21517 const struct dwarf2_per_cu_data
*per_cu
;
21518 sect_offset offset
;
21522 /* Hash function for a dwarf2_per_cu_offset_and_type. */
21525 per_cu_offset_and_type_hash (const void *item
)
21527 const struct dwarf2_per_cu_offset_and_type
*ofs
= item
;
21529 return (uintptr_t) ofs
->per_cu
+ ofs
->offset
.sect_off
;
21532 /* Equality function for a dwarf2_per_cu_offset_and_type. */
21535 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
21537 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
= item_lhs
;
21538 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
= item_rhs
;
21540 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
21541 && ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
);
21544 /* Set the type associated with DIE to TYPE. Save it in CU's hash
21545 table if necessary. For convenience, return TYPE.
21547 The DIEs reading must have careful ordering to:
21548 * Not cause infite loops trying to read in DIEs as a prerequisite for
21549 reading current DIE.
21550 * Not trying to dereference contents of still incompletely read in types
21551 while reading in other DIEs.
21552 * Enable referencing still incompletely read in types just by a pointer to
21553 the type without accessing its fields.
21555 Therefore caller should follow these rules:
21556 * Try to fetch any prerequisite types we may need to build this DIE type
21557 before building the type and calling set_die_type.
21558 * After building type call set_die_type for current DIE as soon as
21559 possible before fetching more types to complete the current type.
21560 * Make the type as complete as possible before fetching more types. */
21562 static struct type
*
21563 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
21565 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
21566 struct objfile
*objfile
= cu
->objfile
;
21568 /* For Ada types, make sure that the gnat-specific data is always
21569 initialized (if not already set). There are a few types where
21570 we should not be doing so, because the type-specific area is
21571 already used to hold some other piece of info (eg: TYPE_CODE_FLT
21572 where the type-specific area is used to store the floatformat).
21573 But this is not a problem, because the gnat-specific information
21574 is actually not needed for these types. */
21575 if (need_gnat_info (cu
)
21576 && TYPE_CODE (type
) != TYPE_CODE_FUNC
21577 && TYPE_CODE (type
) != TYPE_CODE_FLT
21578 && !HAVE_GNAT_AUX_INFO (type
))
21579 INIT_GNAT_SPECIFIC (type
);
21581 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
21583 dwarf2_per_objfile
->die_type_hash
=
21584 htab_create_alloc_ex (127,
21585 per_cu_offset_and_type_hash
,
21586 per_cu_offset_and_type_eq
,
21588 &objfile
->objfile_obstack
,
21589 hashtab_obstack_allocate
,
21590 dummy_obstack_deallocate
);
21593 ofs
.per_cu
= cu
->per_cu
;
21594 ofs
.offset
= die
->offset
;
21596 slot
= (struct dwarf2_per_cu_offset_and_type
**)
21597 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
21599 complaint (&symfile_complaints
,
21600 _("A problem internal to GDB: DIE 0x%x has type already set"),
21601 die
->offset
.sect_off
);
21602 *slot
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (**slot
));
21607 /* Look up the type for the die at OFFSET in PER_CU in die_type_hash,
21608 or return NULL if the die does not have a saved type. */
21610 static struct type
*
21611 get_die_type_at_offset (sect_offset offset
,
21612 struct dwarf2_per_cu_data
*per_cu
)
21614 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
21616 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
21619 ofs
.per_cu
= per_cu
;
21620 ofs
.offset
= offset
;
21621 slot
= htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
);
21628 /* Look up the type for DIE in CU in die_type_hash,
21629 or return NULL if DIE does not have a saved type. */
21631 static struct type
*
21632 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21634 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
21637 /* Add a dependence relationship from CU to REF_PER_CU. */
21640 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
21641 struct dwarf2_per_cu_data
*ref_per_cu
)
21645 if (cu
->dependencies
== NULL
)
21647 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
21648 NULL
, &cu
->comp_unit_obstack
,
21649 hashtab_obstack_allocate
,
21650 dummy_obstack_deallocate
);
21652 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
21654 *slot
= ref_per_cu
;
21657 /* Subroutine of dwarf2_mark to pass to htab_traverse.
21658 Set the mark field in every compilation unit in the
21659 cache that we must keep because we are keeping CU. */
21662 dwarf2_mark_helper (void **slot
, void *data
)
21664 struct dwarf2_per_cu_data
*per_cu
;
21666 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
21668 /* cu->dependencies references may not yet have been ever read if QUIT aborts
21669 reading of the chain. As such dependencies remain valid it is not much
21670 useful to track and undo them during QUIT cleanups. */
21671 if (per_cu
->cu
== NULL
)
21674 if (per_cu
->cu
->mark
)
21676 per_cu
->cu
->mark
= 1;
21678 if (per_cu
->cu
->dependencies
!= NULL
)
21679 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
21684 /* Set the mark field in CU and in every other compilation unit in the
21685 cache that we must keep because we are keeping CU. */
21688 dwarf2_mark (struct dwarf2_cu
*cu
)
21693 if (cu
->dependencies
!= NULL
)
21694 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
21698 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
21702 per_cu
->cu
->mark
= 0;
21703 per_cu
= per_cu
->cu
->read_in_chain
;
21707 /* Trivial hash function for partial_die_info: the hash value of a DIE
21708 is its offset in .debug_info for this objfile. */
21711 partial_die_hash (const void *item
)
21713 const struct partial_die_info
*part_die
= item
;
21715 return part_die
->offset
.sect_off
;
21718 /* Trivial comparison function for partial_die_info structures: two DIEs
21719 are equal if they have the same offset. */
21722 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
21724 const struct partial_die_info
*part_die_lhs
= item_lhs
;
21725 const struct partial_die_info
*part_die_rhs
= item_rhs
;
21727 return part_die_lhs
->offset
.sect_off
== part_die_rhs
->offset
.sect_off
;
21730 static struct cmd_list_element
*set_dwarf2_cmdlist
;
21731 static struct cmd_list_element
*show_dwarf2_cmdlist
;
21734 set_dwarf2_cmd (char *args
, int from_tty
)
21736 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
21740 show_dwarf2_cmd (char *args
, int from_tty
)
21742 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
21745 /* Free data associated with OBJFILE, if necessary. */
21748 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
21750 struct dwarf2_per_objfile
*data
= d
;
21753 /* Make sure we don't accidentally use dwarf2_per_objfile while
21755 dwarf2_per_objfile
= NULL
;
21757 for (ix
= 0; ix
< data
->n_comp_units
; ++ix
)
21758 VEC_free (dwarf2_per_cu_ptr
, data
->all_comp_units
[ix
]->imported_symtabs
);
21760 for (ix
= 0; ix
< data
->n_type_units
; ++ix
)
21761 VEC_free (dwarf2_per_cu_ptr
,
21762 data
->all_type_units
[ix
]->per_cu
.imported_symtabs
);
21763 xfree (data
->all_type_units
);
21765 VEC_free (dwarf2_section_info_def
, data
->types
);
21767 if (data
->dwo_files
)
21768 free_dwo_files (data
->dwo_files
, objfile
);
21769 if (data
->dwp_file
)
21770 gdb_bfd_unref (data
->dwp_file
->dbfd
);
21772 if (data
->dwz_file
&& data
->dwz_file
->dwz_bfd
)
21773 gdb_bfd_unref (data
->dwz_file
->dwz_bfd
);
21777 /* The "save gdb-index" command. */
21779 /* The contents of the hash table we create when building the string
21781 struct strtab_entry
21783 offset_type offset
;
21787 /* Hash function for a strtab_entry.
21789 Function is used only during write_hash_table so no index format backward
21790 compatibility is needed. */
21793 hash_strtab_entry (const void *e
)
21795 const struct strtab_entry
*entry
= e
;
21796 return mapped_index_string_hash (INT_MAX
, entry
->str
);
21799 /* Equality function for a strtab_entry. */
21802 eq_strtab_entry (const void *a
, const void *b
)
21804 const struct strtab_entry
*ea
= a
;
21805 const struct strtab_entry
*eb
= b
;
21806 return !strcmp (ea
->str
, eb
->str
);
21809 /* Create a strtab_entry hash table. */
21812 create_strtab (void)
21814 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
21815 xfree
, xcalloc
, xfree
);
21818 /* Add a string to the constant pool. Return the string's offset in
21822 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
21825 struct strtab_entry entry
;
21826 struct strtab_entry
*result
;
21829 slot
= htab_find_slot (table
, &entry
, INSERT
);
21834 result
= XNEW (struct strtab_entry
);
21835 result
->offset
= obstack_object_size (cpool
);
21837 obstack_grow_str0 (cpool
, str
);
21840 return result
->offset
;
21843 /* An entry in the symbol table. */
21844 struct symtab_index_entry
21846 /* The name of the symbol. */
21848 /* The offset of the name in the constant pool. */
21849 offset_type index_offset
;
21850 /* A sorted vector of the indices of all the CUs that hold an object
21852 VEC (offset_type
) *cu_indices
;
21855 /* The symbol table. This is a power-of-2-sized hash table. */
21856 struct mapped_symtab
21858 offset_type n_elements
;
21860 struct symtab_index_entry
**data
;
21863 /* Hash function for a symtab_index_entry. */
21866 hash_symtab_entry (const void *e
)
21868 const struct symtab_index_entry
*entry
= e
;
21869 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
21870 sizeof (offset_type
) * VEC_length (offset_type
,
21871 entry
->cu_indices
),
21875 /* Equality function for a symtab_index_entry. */
21878 eq_symtab_entry (const void *a
, const void *b
)
21880 const struct symtab_index_entry
*ea
= a
;
21881 const struct symtab_index_entry
*eb
= b
;
21882 int len
= VEC_length (offset_type
, ea
->cu_indices
);
21883 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
21885 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
21886 VEC_address (offset_type
, eb
->cu_indices
),
21887 sizeof (offset_type
) * len
);
21890 /* Destroy a symtab_index_entry. */
21893 delete_symtab_entry (void *p
)
21895 struct symtab_index_entry
*entry
= p
;
21896 VEC_free (offset_type
, entry
->cu_indices
);
21900 /* Create a hash table holding symtab_index_entry objects. */
21903 create_symbol_hash_table (void)
21905 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
21906 delete_symtab_entry
, xcalloc
, xfree
);
21909 /* Create a new mapped symtab object. */
21911 static struct mapped_symtab
*
21912 create_mapped_symtab (void)
21914 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
21915 symtab
->n_elements
= 0;
21916 symtab
->size
= 1024;
21917 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
21921 /* Destroy a mapped_symtab. */
21924 cleanup_mapped_symtab (void *p
)
21926 struct mapped_symtab
*symtab
= p
;
21927 /* The contents of the array are freed when the other hash table is
21929 xfree (symtab
->data
);
21933 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
21936 Function is used only during write_hash_table so no index format backward
21937 compatibility is needed. */
21939 static struct symtab_index_entry
**
21940 find_slot (struct mapped_symtab
*symtab
, const char *name
)
21942 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
21944 index
= hash
& (symtab
->size
- 1);
21945 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
21949 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
21950 return &symtab
->data
[index
];
21951 index
= (index
+ step
) & (symtab
->size
- 1);
21955 /* Expand SYMTAB's hash table. */
21958 hash_expand (struct mapped_symtab
*symtab
)
21960 offset_type old_size
= symtab
->size
;
21962 struct symtab_index_entry
**old_entries
= symtab
->data
;
21965 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
21967 for (i
= 0; i
< old_size
; ++i
)
21969 if (old_entries
[i
])
21971 struct symtab_index_entry
**slot
= find_slot (symtab
,
21972 old_entries
[i
]->name
);
21973 *slot
= old_entries
[i
];
21977 xfree (old_entries
);
21980 /* Add an entry to SYMTAB. NAME is the name of the symbol.
21981 CU_INDEX is the index of the CU in which the symbol appears.
21982 IS_STATIC is one if the symbol is static, otherwise zero (global). */
21985 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
21986 int is_static
, gdb_index_symbol_kind kind
,
21987 offset_type cu_index
)
21989 struct symtab_index_entry
**slot
;
21990 offset_type cu_index_and_attrs
;
21992 ++symtab
->n_elements
;
21993 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
21994 hash_expand (symtab
);
21996 slot
= find_slot (symtab
, name
);
21999 *slot
= XNEW (struct symtab_index_entry
);
22000 (*slot
)->name
= name
;
22001 /* index_offset is set later. */
22002 (*slot
)->cu_indices
= NULL
;
22005 cu_index_and_attrs
= 0;
22006 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs
, cu_index
);
22007 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs
, is_static
);
22008 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs
, kind
);
22010 /* We don't want to record an index value twice as we want to avoid the
22012 We process all global symbols and then all static symbols
22013 (which would allow us to avoid the duplication by only having to check
22014 the last entry pushed), but a symbol could have multiple kinds in one CU.
22015 To keep things simple we don't worry about the duplication here and
22016 sort and uniqufy the list after we've processed all symbols. */
22017 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index_and_attrs
);
22020 /* qsort helper routine for uniquify_cu_indices. */
22023 offset_type_compare (const void *ap
, const void *bp
)
22025 offset_type a
= *(offset_type
*) ap
;
22026 offset_type b
= *(offset_type
*) bp
;
22028 return (a
> b
) - (b
> a
);
22031 /* Sort and remove duplicates of all symbols' cu_indices lists. */
22034 uniquify_cu_indices (struct mapped_symtab
*symtab
)
22038 for (i
= 0; i
< symtab
->size
; ++i
)
22040 struct symtab_index_entry
*entry
= symtab
->data
[i
];
22043 && entry
->cu_indices
!= NULL
)
22045 unsigned int next_to_insert
, next_to_check
;
22046 offset_type last_value
;
22048 qsort (VEC_address (offset_type
, entry
->cu_indices
),
22049 VEC_length (offset_type
, entry
->cu_indices
),
22050 sizeof (offset_type
), offset_type_compare
);
22052 last_value
= VEC_index (offset_type
, entry
->cu_indices
, 0);
22053 next_to_insert
= 1;
22054 for (next_to_check
= 1;
22055 next_to_check
< VEC_length (offset_type
, entry
->cu_indices
);
22058 if (VEC_index (offset_type
, entry
->cu_indices
, next_to_check
)
22061 last_value
= VEC_index (offset_type
, entry
->cu_indices
,
22063 VEC_replace (offset_type
, entry
->cu_indices
, next_to_insert
,
22068 VEC_truncate (offset_type
, entry
->cu_indices
, next_to_insert
);
22073 /* Add a vector of indices to the constant pool. */
22076 add_indices_to_cpool (htab_t symbol_hash_table
, struct obstack
*cpool
,
22077 struct symtab_index_entry
*entry
)
22081 slot
= htab_find_slot (symbol_hash_table
, entry
, INSERT
);
22084 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
22085 offset_type val
= MAYBE_SWAP (len
);
22090 entry
->index_offset
= obstack_object_size (cpool
);
22092 obstack_grow (cpool
, &val
, sizeof (val
));
22094 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
22097 val
= MAYBE_SWAP (iter
);
22098 obstack_grow (cpool
, &val
, sizeof (val
));
22103 struct symtab_index_entry
*old_entry
= *slot
;
22104 entry
->index_offset
= old_entry
->index_offset
;
22107 return entry
->index_offset
;
22110 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
22111 constant pool entries going into the obstack CPOOL. */
22114 write_hash_table (struct mapped_symtab
*symtab
,
22115 struct obstack
*output
, struct obstack
*cpool
)
22118 htab_t symbol_hash_table
;
22121 symbol_hash_table
= create_symbol_hash_table ();
22122 str_table
= create_strtab ();
22124 /* We add all the index vectors to the constant pool first, to
22125 ensure alignment is ok. */
22126 for (i
= 0; i
< symtab
->size
; ++i
)
22128 if (symtab
->data
[i
])
22129 add_indices_to_cpool (symbol_hash_table
, cpool
, symtab
->data
[i
]);
22132 /* Now write out the hash table. */
22133 for (i
= 0; i
< symtab
->size
; ++i
)
22135 offset_type str_off
, vec_off
;
22137 if (symtab
->data
[i
])
22139 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
22140 vec_off
= symtab
->data
[i
]->index_offset
;
22144 /* While 0 is a valid constant pool index, it is not valid
22145 to have 0 for both offsets. */
22150 str_off
= MAYBE_SWAP (str_off
);
22151 vec_off
= MAYBE_SWAP (vec_off
);
22153 obstack_grow (output
, &str_off
, sizeof (str_off
));
22154 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
22157 htab_delete (str_table
);
22158 htab_delete (symbol_hash_table
);
22161 /* Struct to map psymtab to CU index in the index file. */
22162 struct psymtab_cu_index_map
22164 struct partial_symtab
*psymtab
;
22165 unsigned int cu_index
;
22169 hash_psymtab_cu_index (const void *item
)
22171 const struct psymtab_cu_index_map
*map
= item
;
22173 return htab_hash_pointer (map
->psymtab
);
22177 eq_psymtab_cu_index (const void *item_lhs
, const void *item_rhs
)
22179 const struct psymtab_cu_index_map
*lhs
= item_lhs
;
22180 const struct psymtab_cu_index_map
*rhs
= item_rhs
;
22182 return lhs
->psymtab
== rhs
->psymtab
;
22185 /* Helper struct for building the address table. */
22186 struct addrmap_index_data
22188 struct objfile
*objfile
;
22189 struct obstack
*addr_obstack
;
22190 htab_t cu_index_htab
;
22192 /* Non-zero if the previous_* fields are valid.
22193 We can't write an entry until we see the next entry (since it is only then
22194 that we know the end of the entry). */
22195 int previous_valid
;
22196 /* Index of the CU in the table of all CUs in the index file. */
22197 unsigned int previous_cu_index
;
22198 /* Start address of the CU. */
22199 CORE_ADDR previous_cu_start
;
22202 /* Write an address entry to OBSTACK. */
22205 add_address_entry (struct objfile
*objfile
, struct obstack
*obstack
,
22206 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
22208 offset_type cu_index_to_write
;
22210 CORE_ADDR baseaddr
;
22212 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
22214 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
22215 obstack_grow (obstack
, addr
, 8);
22216 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
22217 obstack_grow (obstack
, addr
, 8);
22218 cu_index_to_write
= MAYBE_SWAP (cu_index
);
22219 obstack_grow (obstack
, &cu_index_to_write
, sizeof (offset_type
));
22222 /* Worker function for traversing an addrmap to build the address table. */
22225 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
22227 struct addrmap_index_data
*data
= datap
;
22228 struct partial_symtab
*pst
= obj
;
22230 if (data
->previous_valid
)
22231 add_address_entry (data
->objfile
, data
->addr_obstack
,
22232 data
->previous_cu_start
, start_addr
,
22233 data
->previous_cu_index
);
22235 data
->previous_cu_start
= start_addr
;
22238 struct psymtab_cu_index_map find_map
, *map
;
22239 find_map
.psymtab
= pst
;
22240 map
= htab_find (data
->cu_index_htab
, &find_map
);
22241 gdb_assert (map
!= NULL
);
22242 data
->previous_cu_index
= map
->cu_index
;
22243 data
->previous_valid
= 1;
22246 data
->previous_valid
= 0;
22251 /* Write OBJFILE's address map to OBSTACK.
22252 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
22253 in the index file. */
22256 write_address_map (struct objfile
*objfile
, struct obstack
*obstack
,
22257 htab_t cu_index_htab
)
22259 struct addrmap_index_data addrmap_index_data
;
22261 /* When writing the address table, we have to cope with the fact that
22262 the addrmap iterator only provides the start of a region; we have to
22263 wait until the next invocation to get the start of the next region. */
22265 addrmap_index_data
.objfile
= objfile
;
22266 addrmap_index_data
.addr_obstack
= obstack
;
22267 addrmap_index_data
.cu_index_htab
= cu_index_htab
;
22268 addrmap_index_data
.previous_valid
= 0;
22270 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
22271 &addrmap_index_data
);
22273 /* It's highly unlikely the last entry (end address = 0xff...ff)
22274 is valid, but we should still handle it.
22275 The end address is recorded as the start of the next region, but that
22276 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
22278 if (addrmap_index_data
.previous_valid
)
22279 add_address_entry (objfile
, obstack
,
22280 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
22281 addrmap_index_data
.previous_cu_index
);
22284 /* Return the symbol kind of PSYM. */
22286 static gdb_index_symbol_kind
22287 symbol_kind (struct partial_symbol
*psym
)
22289 domain_enum domain
= PSYMBOL_DOMAIN (psym
);
22290 enum address_class aclass
= PSYMBOL_CLASS (psym
);
22298 return GDB_INDEX_SYMBOL_KIND_FUNCTION
;
22300 return GDB_INDEX_SYMBOL_KIND_TYPE
;
22302 case LOC_CONST_BYTES
:
22303 case LOC_OPTIMIZED_OUT
:
22305 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
22307 /* Note: It's currently impossible to recognize psyms as enum values
22308 short of reading the type info. For now punt. */
22309 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
22311 /* There are other LOC_FOO values that one might want to classify
22312 as variables, but dwarf2read.c doesn't currently use them. */
22313 return GDB_INDEX_SYMBOL_KIND_OTHER
;
22315 case STRUCT_DOMAIN
:
22316 return GDB_INDEX_SYMBOL_KIND_TYPE
;
22318 return GDB_INDEX_SYMBOL_KIND_OTHER
;
22322 /* Add a list of partial symbols to SYMTAB. */
22325 write_psymbols (struct mapped_symtab
*symtab
,
22327 struct partial_symbol
**psymp
,
22329 offset_type cu_index
,
22332 for (; count
-- > 0; ++psymp
)
22334 struct partial_symbol
*psym
= *psymp
;
22337 if (SYMBOL_LANGUAGE (psym
) == language_ada
)
22338 error (_("Ada is not currently supported by the index"));
22340 /* Only add a given psymbol once. */
22341 slot
= htab_find_slot (psyms_seen
, psym
, INSERT
);
22344 gdb_index_symbol_kind kind
= symbol_kind (psym
);
22347 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (psym
),
22348 is_static
, kind
, cu_index
);
22353 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
22354 exception if there is an error. */
22357 write_obstack (FILE *file
, struct obstack
*obstack
)
22359 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
22361 != obstack_object_size (obstack
))
22362 error (_("couldn't data write to file"));
22365 /* Unlink a file if the argument is not NULL. */
22368 unlink_if_set (void *p
)
22370 char **filename
= p
;
22372 unlink (*filename
);
22375 /* A helper struct used when iterating over debug_types. */
22376 struct signatured_type_index_data
22378 struct objfile
*objfile
;
22379 struct mapped_symtab
*symtab
;
22380 struct obstack
*types_list
;
22385 /* A helper function that writes a single signatured_type to an
22389 write_one_signatured_type (void **slot
, void *d
)
22391 struct signatured_type_index_data
*info
= d
;
22392 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
22393 struct partial_symtab
*psymtab
= entry
->per_cu
.v
.psymtab
;
22396 write_psymbols (info
->symtab
,
22398 info
->objfile
->global_psymbols
.list
22399 + psymtab
->globals_offset
,
22400 psymtab
->n_global_syms
, info
->cu_index
,
22402 write_psymbols (info
->symtab
,
22404 info
->objfile
->static_psymbols
.list
22405 + psymtab
->statics_offset
,
22406 psymtab
->n_static_syms
, info
->cu_index
,
22409 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
22410 entry
->per_cu
.offset
.sect_off
);
22411 obstack_grow (info
->types_list
, val
, 8);
22412 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
22413 entry
->type_offset_in_tu
.cu_off
);
22414 obstack_grow (info
->types_list
, val
, 8);
22415 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
22416 obstack_grow (info
->types_list
, val
, 8);
22423 /* Recurse into all "included" dependencies and write their symbols as
22424 if they appeared in this psymtab. */
22427 recursively_write_psymbols (struct objfile
*objfile
,
22428 struct partial_symtab
*psymtab
,
22429 struct mapped_symtab
*symtab
,
22431 offset_type cu_index
)
22435 for (i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
22436 if (psymtab
->dependencies
[i
]->user
!= NULL
)
22437 recursively_write_psymbols (objfile
, psymtab
->dependencies
[i
],
22438 symtab
, psyms_seen
, cu_index
);
22440 write_psymbols (symtab
,
22442 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
22443 psymtab
->n_global_syms
, cu_index
,
22445 write_psymbols (symtab
,
22447 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
22448 psymtab
->n_static_syms
, cu_index
,
22452 /* Create an index file for OBJFILE in the directory DIR. */
22455 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
22457 struct cleanup
*cleanup
;
22458 char *filename
, *cleanup_filename
;
22459 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
22460 struct obstack cu_list
, types_cu_list
;
22463 struct mapped_symtab
*symtab
;
22464 offset_type val
, size_of_contents
, total_len
;
22467 htab_t cu_index_htab
;
22468 struct psymtab_cu_index_map
*psymtab_cu_index_map
;
22470 if (dwarf2_per_objfile
->using_index
)
22471 error (_("Cannot use an index to create the index"));
22473 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
22474 error (_("Cannot make an index when the file has multiple .debug_types sections"));
22476 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
22479 if (stat (objfile_name (objfile
), &st
) < 0)
22480 perror_with_name (objfile_name (objfile
));
22482 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile_name (objfile
)),
22483 INDEX_SUFFIX
, (char *) NULL
);
22484 cleanup
= make_cleanup (xfree
, filename
);
22486 out_file
= gdb_fopen_cloexec (filename
, "wb");
22488 error (_("Can't open `%s' for writing"), filename
);
22490 cleanup_filename
= filename
;
22491 make_cleanup (unlink_if_set
, &cleanup_filename
);
22493 symtab
= create_mapped_symtab ();
22494 make_cleanup (cleanup_mapped_symtab
, symtab
);
22496 obstack_init (&addr_obstack
);
22497 make_cleanup_obstack_free (&addr_obstack
);
22499 obstack_init (&cu_list
);
22500 make_cleanup_obstack_free (&cu_list
);
22502 obstack_init (&types_cu_list
);
22503 make_cleanup_obstack_free (&types_cu_list
);
22505 psyms_seen
= htab_create_alloc (100, htab_hash_pointer
, htab_eq_pointer
,
22506 NULL
, xcalloc
, xfree
);
22507 make_cleanup_htab_delete (psyms_seen
);
22509 /* While we're scanning CU's create a table that maps a psymtab pointer
22510 (which is what addrmap records) to its index (which is what is recorded
22511 in the index file). This will later be needed to write the address
22513 cu_index_htab
= htab_create_alloc (100,
22514 hash_psymtab_cu_index
,
22515 eq_psymtab_cu_index
,
22516 NULL
, xcalloc
, xfree
);
22517 make_cleanup_htab_delete (cu_index_htab
);
22518 psymtab_cu_index_map
= (struct psymtab_cu_index_map
*)
22519 xmalloc (sizeof (struct psymtab_cu_index_map
)
22520 * dwarf2_per_objfile
->n_comp_units
);
22521 make_cleanup (xfree
, psymtab_cu_index_map
);
22523 /* The CU list is already sorted, so we don't need to do additional
22524 work here. Also, the debug_types entries do not appear in
22525 all_comp_units, but only in their own hash table. */
22526 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
22528 struct dwarf2_per_cu_data
*per_cu
22529 = dwarf2_per_objfile
->all_comp_units
[i
];
22530 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
22532 struct psymtab_cu_index_map
*map
;
22535 /* CU of a shared file from 'dwz -m' may be unused by this main file.
22536 It may be referenced from a local scope but in such case it does not
22537 need to be present in .gdb_index. */
22538 if (psymtab
== NULL
)
22541 if (psymtab
->user
== NULL
)
22542 recursively_write_psymbols (objfile
, psymtab
, symtab
, psyms_seen
, i
);
22544 map
= &psymtab_cu_index_map
[i
];
22545 map
->psymtab
= psymtab
;
22547 slot
= htab_find_slot (cu_index_htab
, map
, INSERT
);
22548 gdb_assert (slot
!= NULL
);
22549 gdb_assert (*slot
== NULL
);
22552 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
22553 per_cu
->offset
.sect_off
);
22554 obstack_grow (&cu_list
, val
, 8);
22555 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
22556 obstack_grow (&cu_list
, val
, 8);
22559 /* Dump the address map. */
22560 write_address_map (objfile
, &addr_obstack
, cu_index_htab
);
22562 /* Write out the .debug_type entries, if any. */
22563 if (dwarf2_per_objfile
->signatured_types
)
22565 struct signatured_type_index_data sig_data
;
22567 sig_data
.objfile
= objfile
;
22568 sig_data
.symtab
= symtab
;
22569 sig_data
.types_list
= &types_cu_list
;
22570 sig_data
.psyms_seen
= psyms_seen
;
22571 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
22572 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
22573 write_one_signatured_type
, &sig_data
);
22576 /* Now that we've processed all symbols we can shrink their cu_indices
22578 uniquify_cu_indices (symtab
);
22580 obstack_init (&constant_pool
);
22581 make_cleanup_obstack_free (&constant_pool
);
22582 obstack_init (&symtab_obstack
);
22583 make_cleanup_obstack_free (&symtab_obstack
);
22584 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
22586 obstack_init (&contents
);
22587 make_cleanup_obstack_free (&contents
);
22588 size_of_contents
= 6 * sizeof (offset_type
);
22589 total_len
= size_of_contents
;
22591 /* The version number. */
22592 val
= MAYBE_SWAP (8);
22593 obstack_grow (&contents
, &val
, sizeof (val
));
22595 /* The offset of the CU list from the start of the file. */
22596 val
= MAYBE_SWAP (total_len
);
22597 obstack_grow (&contents
, &val
, sizeof (val
));
22598 total_len
+= obstack_object_size (&cu_list
);
22600 /* The offset of the types CU list from the start of the file. */
22601 val
= MAYBE_SWAP (total_len
);
22602 obstack_grow (&contents
, &val
, sizeof (val
));
22603 total_len
+= obstack_object_size (&types_cu_list
);
22605 /* The offset of the address table from the start of the file. */
22606 val
= MAYBE_SWAP (total_len
);
22607 obstack_grow (&contents
, &val
, sizeof (val
));
22608 total_len
+= obstack_object_size (&addr_obstack
);
22610 /* The offset of the symbol table from the start of the file. */
22611 val
= MAYBE_SWAP (total_len
);
22612 obstack_grow (&contents
, &val
, sizeof (val
));
22613 total_len
+= obstack_object_size (&symtab_obstack
);
22615 /* The offset of the constant pool from the start of the file. */
22616 val
= MAYBE_SWAP (total_len
);
22617 obstack_grow (&contents
, &val
, sizeof (val
));
22618 total_len
+= obstack_object_size (&constant_pool
);
22620 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
22622 write_obstack (out_file
, &contents
);
22623 write_obstack (out_file
, &cu_list
);
22624 write_obstack (out_file
, &types_cu_list
);
22625 write_obstack (out_file
, &addr_obstack
);
22626 write_obstack (out_file
, &symtab_obstack
);
22627 write_obstack (out_file
, &constant_pool
);
22631 /* We want to keep the file, so we set cleanup_filename to NULL
22632 here. See unlink_if_set. */
22633 cleanup_filename
= NULL
;
22635 do_cleanups (cleanup
);
22638 /* Implementation of the `save gdb-index' command.
22640 Note that the file format used by this command is documented in the
22641 GDB manual. Any changes here must be documented there. */
22644 save_gdb_index_command (char *arg
, int from_tty
)
22646 struct objfile
*objfile
;
22649 error (_("usage: save gdb-index DIRECTORY"));
22651 ALL_OBJFILES (objfile
)
22655 /* If the objfile does not correspond to an actual file, skip it. */
22656 if (stat (objfile_name (objfile
), &st
) < 0)
22659 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
22660 if (dwarf2_per_objfile
)
22662 volatile struct gdb_exception except
;
22664 TRY_CATCH (except
, RETURN_MASK_ERROR
)
22666 write_psymtabs_to_index (objfile
, arg
);
22668 if (except
.reason
< 0)
22669 exception_fprintf (gdb_stderr
, except
,
22670 _("Error while writing index for `%s': "),
22671 objfile_name (objfile
));
22678 int dwarf2_always_disassemble
;
22681 show_dwarf2_always_disassemble (struct ui_file
*file
, int from_tty
,
22682 struct cmd_list_element
*c
, const char *value
)
22684 fprintf_filtered (file
,
22685 _("Whether to always disassemble "
22686 "DWARF expressions is %s.\n"),
22691 show_check_physname (struct ui_file
*file
, int from_tty
,
22692 struct cmd_list_element
*c
, const char *value
)
22694 fprintf_filtered (file
,
22695 _("Whether to check \"physname\" is %s.\n"),
22699 void _initialize_dwarf2_read (void);
22702 _initialize_dwarf2_read (void)
22704 struct cmd_list_element
*c
;
22706 dwarf2_objfile_data_key
22707 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
22709 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
22710 Set DWARF 2 specific variables.\n\
22711 Configure DWARF 2 variables such as the cache size"),
22712 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
22713 0/*allow-unknown*/, &maintenance_set_cmdlist
);
22715 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
22716 Show DWARF 2 specific variables\n\
22717 Show DWARF 2 variables such as the cache size"),
22718 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
22719 0/*allow-unknown*/, &maintenance_show_cmdlist
);
22721 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
22722 &dwarf2_max_cache_age
, _("\
22723 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
22724 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
22725 A higher limit means that cached compilation units will be stored\n\
22726 in memory longer, and more total memory will be used. Zero disables\n\
22727 caching, which can slow down startup."),
22729 show_dwarf2_max_cache_age
,
22730 &set_dwarf2_cmdlist
,
22731 &show_dwarf2_cmdlist
);
22733 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
22734 &dwarf2_always_disassemble
, _("\
22735 Set whether `info address' always disassembles DWARF expressions."), _("\
22736 Show whether `info address' always disassembles DWARF expressions."), _("\
22737 When enabled, DWARF expressions are always printed in an assembly-like\n\
22738 syntax. When disabled, expressions will be printed in a more\n\
22739 conversational style, when possible."),
22741 show_dwarf2_always_disassemble
,
22742 &set_dwarf2_cmdlist
,
22743 &show_dwarf2_cmdlist
);
22745 add_setshow_zuinteger_cmd ("dwarf2-read", no_class
, &dwarf2_read_debug
, _("\
22746 Set debugging of the dwarf2 reader."), _("\
22747 Show debugging of the dwarf2 reader."), _("\
22748 When enabled (non-zero), debugging messages are printed during dwarf2\n\
22749 reading and symtab expansion. A value of 1 (one) provides basic\n\
22750 information. A value greater than 1 provides more verbose information."),
22753 &setdebuglist
, &showdebuglist
);
22755 add_setshow_zuinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
22756 Set debugging of the dwarf2 DIE reader."), _("\
22757 Show debugging of the dwarf2 DIE reader."), _("\
22758 When enabled (non-zero), DIEs are dumped after they are read in.\n\
22759 The value is the maximum depth to print."),
22762 &setdebuglist
, &showdebuglist
);
22764 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
22765 Set cross-checking of \"physname\" code against demangler."), _("\
22766 Show cross-checking of \"physname\" code against demangler."), _("\
22767 When enabled, GDB's internal \"physname\" code is checked against\n\
22769 NULL
, show_check_physname
,
22770 &setdebuglist
, &showdebuglist
);
22772 add_setshow_boolean_cmd ("use-deprecated-index-sections",
22773 no_class
, &use_deprecated_index_sections
, _("\
22774 Set whether to use deprecated gdb_index sections."), _("\
22775 Show whether to use deprecated gdb_index sections."), _("\
22776 When enabled, deprecated .gdb_index sections are used anyway.\n\
22777 Normally they are ignored either because of a missing feature or\n\
22778 performance issue.\n\
22779 Warning: This option must be enabled before gdb reads the file."),
22782 &setlist
, &showlist
);
22784 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
22786 Save a gdb-index file.\n\
22787 Usage: save gdb-index DIRECTORY"),
22789 set_cmd_completer (c
, filename_completer
);
22791 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
22792 &dwarf2_locexpr_funcs
);
22793 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
22794 &dwarf2_loclist_funcs
);
22796 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
22797 &dwarf2_block_frame_base_locexpr_funcs
);
22798 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
22799 &dwarf2_block_frame_base_loclist_funcs
);