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 /* Table of struct type_unit_group objects.
243 The hash key is the DW_AT_stmt_list value. */
244 htab_t type_unit_groups
;
246 /* A table mapping .debug_types signatures to its signatured_type entry.
247 This is NULL if the .debug_types section hasn't been read in yet. */
248 htab_t signatured_types
;
250 /* Type unit statistics, to see how well the scaling improvements
254 int nr_uniq_abbrev_tables
;
256 int nr_symtab_sharers
;
257 int nr_stmt_less_type_units
;
260 /* A chain of compilation units that are currently read in, so that
261 they can be freed later. */
262 struct dwarf2_per_cu_data
*read_in_chain
;
264 /* A table mapping DW_AT_dwo_name values to struct dwo_file objects.
265 This is NULL if the table hasn't been allocated yet. */
268 /* Non-zero if we've check for whether there is a DWP file. */
271 /* The DWP file if there is one, or NULL. */
272 struct dwp_file
*dwp_file
;
274 /* The shared '.dwz' file, if one exists. This is used when the
275 original data was compressed using 'dwz -m'. */
276 struct dwz_file
*dwz_file
;
278 /* A flag indicating wether this objfile has a section loaded at a
280 int has_section_at_zero
;
282 /* True if we are using the mapped index,
283 or we are faking it for OBJF_READNOW's sake. */
284 unsigned char using_index
;
286 /* The mapped index, or NULL if .gdb_index is missing or not being used. */
287 struct mapped_index
*index_table
;
289 /* When using index_table, this keeps track of all quick_file_names entries.
290 TUs typically share line table entries with a CU, so we maintain a
291 separate table of all line table entries to support the sharing.
292 Note that while there can be way more TUs than CUs, we've already
293 sorted all the TUs into "type unit groups", grouped by their
294 DW_AT_stmt_list value. Therefore the only sharing done here is with a
295 CU and its associated TU group if there is one. */
296 htab_t quick_file_names_table
;
298 /* Set during partial symbol reading, to prevent queueing of full
300 int reading_partial_symbols
;
302 /* Table mapping type DIEs to their struct type *.
303 This is NULL if not allocated yet.
304 The mapping is done via (CU/TU + DIE offset) -> type. */
305 htab_t die_type_hash
;
307 /* The CUs we recently read. */
308 VEC (dwarf2_per_cu_ptr
) *just_read_cus
;
311 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
313 /* Default names of the debugging sections. */
315 /* Note that if the debugging section has been compressed, it might
316 have a name like .zdebug_info. */
318 static const struct dwarf2_debug_sections dwarf2_elf_names
=
320 { ".debug_info", ".zdebug_info" },
321 { ".debug_abbrev", ".zdebug_abbrev" },
322 { ".debug_line", ".zdebug_line" },
323 { ".debug_loc", ".zdebug_loc" },
324 { ".debug_macinfo", ".zdebug_macinfo" },
325 { ".debug_macro", ".zdebug_macro" },
326 { ".debug_str", ".zdebug_str" },
327 { ".debug_ranges", ".zdebug_ranges" },
328 { ".debug_types", ".zdebug_types" },
329 { ".debug_addr", ".zdebug_addr" },
330 { ".debug_frame", ".zdebug_frame" },
331 { ".eh_frame", NULL
},
332 { ".gdb_index", ".zgdb_index" },
336 /* List of DWO/DWP sections. */
338 static const struct dwop_section_names
340 struct dwarf2_section_names abbrev_dwo
;
341 struct dwarf2_section_names info_dwo
;
342 struct dwarf2_section_names line_dwo
;
343 struct dwarf2_section_names loc_dwo
;
344 struct dwarf2_section_names macinfo_dwo
;
345 struct dwarf2_section_names macro_dwo
;
346 struct dwarf2_section_names str_dwo
;
347 struct dwarf2_section_names str_offsets_dwo
;
348 struct dwarf2_section_names types_dwo
;
349 struct dwarf2_section_names cu_index
;
350 struct dwarf2_section_names tu_index
;
354 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
355 { ".debug_info.dwo", ".zdebug_info.dwo" },
356 { ".debug_line.dwo", ".zdebug_line.dwo" },
357 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
358 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
359 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
360 { ".debug_str.dwo", ".zdebug_str.dwo" },
361 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
362 { ".debug_types.dwo", ".zdebug_types.dwo" },
363 { ".debug_cu_index", ".zdebug_cu_index" },
364 { ".debug_tu_index", ".zdebug_tu_index" },
367 /* local data types */
369 /* The data in a compilation unit header, after target2host
370 translation, looks like this. */
371 struct comp_unit_head
375 unsigned char addr_size
;
376 unsigned char signed_addr_p
;
377 sect_offset abbrev_offset
;
379 /* Size of file offsets; either 4 or 8. */
380 unsigned int offset_size
;
382 /* Size of the length field; either 4 or 12. */
383 unsigned int initial_length_size
;
385 /* Offset to the first byte of this compilation unit header in the
386 .debug_info section, for resolving relative reference dies. */
389 /* Offset to first die in this cu from the start of the cu.
390 This will be the first byte following the compilation unit header. */
391 cu_offset first_die_offset
;
394 /* Type used for delaying computation of method physnames.
395 See comments for compute_delayed_physnames. */
396 struct delayed_method_info
398 /* The type to which the method is attached, i.e., its parent class. */
401 /* The index of the method in the type's function fieldlists. */
404 /* The index of the method in the fieldlist. */
407 /* The name of the DIE. */
410 /* The DIE associated with this method. */
411 struct die_info
*die
;
414 typedef struct delayed_method_info delayed_method_info
;
415 DEF_VEC_O (delayed_method_info
);
417 /* Internal state when decoding a particular compilation unit. */
420 /* The objfile containing this compilation unit. */
421 struct objfile
*objfile
;
423 /* The header of the compilation unit. */
424 struct comp_unit_head header
;
426 /* Base address of this compilation unit. */
427 CORE_ADDR base_address
;
429 /* Non-zero if base_address has been set. */
432 /* The language we are debugging. */
433 enum language language
;
434 const struct language_defn
*language_defn
;
436 const char *producer
;
438 /* The generic symbol table building routines have separate lists for
439 file scope symbols and all all other scopes (local scopes). So
440 we need to select the right one to pass to add_symbol_to_list().
441 We do it by keeping a pointer to the correct list in list_in_scope.
443 FIXME: The original dwarf code just treated the file scope as the
444 first local scope, and all other local scopes as nested local
445 scopes, and worked fine. Check to see if we really need to
446 distinguish these in buildsym.c. */
447 struct pending
**list_in_scope
;
449 /* The abbrev table for this CU.
450 Normally this points to the abbrev table in the objfile.
451 But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */
452 struct abbrev_table
*abbrev_table
;
454 /* Hash table holding all the loaded partial DIEs
455 with partial_die->offset.SECT_OFF as hash. */
458 /* Storage for things with the same lifetime as this read-in compilation
459 unit, including partial DIEs. */
460 struct obstack comp_unit_obstack
;
462 /* When multiple dwarf2_cu structures are living in memory, this field
463 chains them all together, so that they can be released efficiently.
464 We will probably also want a generation counter so that most-recently-used
465 compilation units are cached... */
466 struct dwarf2_per_cu_data
*read_in_chain
;
468 /* Backlink to our per_cu entry. */
469 struct dwarf2_per_cu_data
*per_cu
;
471 /* How many compilation units ago was this CU last referenced? */
474 /* A hash table of DIE cu_offset for following references with
475 die_info->offset.sect_off as hash. */
478 /* Full DIEs if read in. */
479 struct die_info
*dies
;
481 /* A set of pointers to dwarf2_per_cu_data objects for compilation
482 units referenced by this one. Only set during full symbol processing;
483 partial symbol tables do not have dependencies. */
486 /* Header data from the line table, during full symbol processing. */
487 struct line_header
*line_header
;
489 /* A list of methods which need to have physnames computed
490 after all type information has been read. */
491 VEC (delayed_method_info
) *method_list
;
493 /* To be copied to symtab->call_site_htab. */
494 htab_t call_site_htab
;
496 /* Non-NULL if this CU came from a DWO file.
497 There is an invariant here that is important to remember:
498 Except for attributes copied from the top level DIE in the "main"
499 (or "stub") file in preparation for reading the DWO file
500 (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
501 Either there isn't a DWO file (in which case this is NULL and the point
502 is moot), or there is and either we're not going to read it (in which
503 case this is NULL) or there is and we are reading it (in which case this
505 struct dwo_unit
*dwo_unit
;
507 /* The DW_AT_addr_base attribute if present, zero otherwise
508 (zero is a valid value though).
509 Note this value comes from the Fission stub CU/TU's DIE. */
512 /* The DW_AT_ranges_base attribute if present, zero otherwise
513 (zero is a valid value though).
514 Note this value comes from the Fission stub CU/TU's DIE.
515 Also note that the value is zero in the non-DWO case so this value can
516 be used without needing to know whether DWO files are in use or not.
517 N.B. This does not apply to DW_AT_ranges appearing in
518 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
519 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
520 DW_AT_ranges_base *would* have to be applied, and we'd have to care
521 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
522 ULONGEST ranges_base
;
524 /* Mark used when releasing cached dies. */
525 unsigned int mark
: 1;
527 /* This CU references .debug_loc. See the symtab->locations_valid field.
528 This test is imperfect as there may exist optimized debug code not using
529 any location list and still facing inlining issues if handled as
530 unoptimized code. For a future better test see GCC PR other/32998. */
531 unsigned int has_loclist
: 1;
533 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set
534 if all the producer_is_* fields are valid. This information is cached
535 because profiling CU expansion showed excessive time spent in
536 producer_is_gxx_lt_4_6. */
537 unsigned int checked_producer
: 1;
538 unsigned int producer_is_gxx_lt_4_6
: 1;
539 unsigned int producer_is_gcc_lt_4_3
: 1;
540 unsigned int producer_is_icc
: 1;
542 /* When set, the file that we're processing is known to have
543 debugging info for C++ namespaces. GCC 3.3.x did not produce
544 this information, but later versions do. */
546 unsigned int processing_has_namespace_info
: 1;
549 /* Persistent data held for a compilation unit, even when not
550 processing it. We put a pointer to this structure in the
551 read_symtab_private field of the psymtab. */
553 struct dwarf2_per_cu_data
555 /* The start offset and length of this compilation unit.
556 NOTE: Unlike comp_unit_head.length, this length includes
558 If the DIE refers to a DWO file, this is always of the original die,
563 /* Flag indicating this compilation unit will be read in before
564 any of the current compilation units are processed. */
565 unsigned int queued
: 1;
567 /* This flag will be set when reading partial DIEs if we need to load
568 absolutely all DIEs for this compilation unit, instead of just the ones
569 we think are interesting. It gets set if we look for a DIE in the
570 hash table and don't find it. */
571 unsigned int load_all_dies
: 1;
573 /* Non-zero if this CU is from .debug_types.
574 Struct dwarf2_per_cu_data is contained in struct signatured_type iff
576 unsigned int is_debug_types
: 1;
578 /* Non-zero if this CU is from the .dwz file. */
579 unsigned int is_dwz
: 1;
581 /* Non-zero if reading a TU directly from a DWO file, bypassing the stub.
582 This flag is only valid if is_debug_types is true.
583 We can't read a CU directly from a DWO file: There are required
584 attributes in the stub. */
585 unsigned int reading_dwo_directly
: 1;
587 /* Non-zero if the TU has been read.
588 This is used to assist the "Stay in DWO Optimization" for Fission:
589 When reading a DWO, it's faster to read TUs from the DWO instead of
590 fetching them from random other DWOs (due to comdat folding).
591 If the TU has already been read, the optimization is unnecessary
592 (and unwise - we don't want to change where gdb thinks the TU lives
594 This flag is only valid if is_debug_types is true. */
595 unsigned int tu_read
: 1;
597 /* The section this CU/TU lives in.
598 If the DIE refers to a DWO file, this is always the original die,
600 struct dwarf2_section_info
*section
;
602 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
603 of the CU cache it gets reset to NULL again. */
604 struct dwarf2_cu
*cu
;
606 /* The corresponding objfile.
607 Normally we can get the objfile from dwarf2_per_objfile.
608 However we can enter this file with just a "per_cu" handle. */
609 struct objfile
*objfile
;
611 /* When using partial symbol tables, the 'psymtab' field is active.
612 Otherwise the 'quick' field is active. */
615 /* The partial symbol table associated with this compilation unit,
616 or NULL for unread partial units. */
617 struct partial_symtab
*psymtab
;
619 /* Data needed by the "quick" functions. */
620 struct dwarf2_per_cu_quick_data
*quick
;
623 /* The CUs we import using DW_TAG_imported_unit. This is filled in
624 while reading psymtabs, used to compute the psymtab dependencies,
625 and then cleared. Then it is filled in again while reading full
626 symbols, and only deleted when the objfile is destroyed.
628 This is also used to work around a difference between the way gold
629 generates .gdb_index version <=7 and the way gdb does. Arguably this
630 is a gold bug. For symbols coming from TUs, gold records in the index
631 the CU that includes the TU instead of the TU itself. This breaks
632 dw2_lookup_symbol: It assumes that if the index says symbol X lives
633 in CU/TU Y, then one need only expand Y and a subsequent lookup in Y
634 will find X. Alas TUs live in their own symtab, so after expanding CU Y
635 we need to look in TU Z to find X. Fortunately, this is akin to
636 DW_TAG_imported_unit, so we just use the same mechanism: For
637 .gdb_index version <=7 this also records the TUs that the CU referred
638 to. Concurrently with this change gdb was modified to emit version 8
639 indices so we only pay a price for gold generated indices.
640 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
641 VEC (dwarf2_per_cu_ptr
) *imported_symtabs
;
644 /* Entry in the signatured_types hash table. */
646 struct signatured_type
648 /* The "per_cu" object of this type.
649 This struct is used iff per_cu.is_debug_types.
650 N.B.: This is the first member so that it's easy to convert pointers
652 struct dwarf2_per_cu_data per_cu
;
654 /* The type's signature. */
657 /* Offset in the TU of the type's DIE, as read from the TU header.
658 If this TU is a DWO stub and the definition lives in a DWO file
659 (specified by DW_AT_GNU_dwo_name), this value is unusable. */
660 cu_offset type_offset_in_tu
;
662 /* Offset in the section of the type's DIE.
663 If the definition lives in a DWO file, this is the offset in the
664 .debug_types.dwo section.
665 The value is zero until the actual value is known.
666 Zero is otherwise not a valid section offset. */
667 sect_offset type_offset_in_section
;
669 /* Type units are grouped by their DW_AT_stmt_list entry so that they
670 can share them. This points to the containing symtab. */
671 struct type_unit_group
*type_unit_group
;
674 The first time we encounter this type we fully read it in and install it
675 in the symbol tables. Subsequent times we only need the type. */
678 /* Containing DWO unit.
679 This field is valid iff per_cu.reading_dwo_directly. */
680 struct dwo_unit
*dwo_unit
;
683 typedef struct signatured_type
*sig_type_ptr
;
684 DEF_VEC_P (sig_type_ptr
);
686 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
687 This includes type_unit_group and quick_file_names. */
689 struct stmt_list_hash
691 /* The DWO unit this table is from or NULL if there is none. */
692 struct dwo_unit
*dwo_unit
;
694 /* Offset in .debug_line or .debug_line.dwo. */
695 sect_offset line_offset
;
698 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
699 an object of this type. */
701 struct type_unit_group
703 /* dwarf2read.c's main "handle" on a TU symtab.
704 To simplify things we create an artificial CU that "includes" all the
705 type units using this stmt_list so that the rest of the code still has
706 a "per_cu" handle on the symtab.
707 This PER_CU is recognized by having no section. */
708 #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL)
709 struct dwarf2_per_cu_data per_cu
;
711 /* The TUs that share this DW_AT_stmt_list entry.
712 This is added to while parsing type units to build partial symtabs,
713 and is deleted afterwards and not used again. */
714 VEC (sig_type_ptr
) *tus
;
716 /* The primary symtab.
717 Type units in a group needn't all be defined in the same source file,
718 so we create an essentially anonymous symtab as the primary symtab. */
719 struct symtab
*primary_symtab
;
721 /* The data used to construct the hash key. */
722 struct stmt_list_hash hash
;
724 /* The number of symtabs from the line header.
725 The value here must match line_header.num_file_names. */
726 unsigned int num_symtabs
;
728 /* The symbol tables for this TU (obtained from the files listed in
730 WARNING: The order of entries here must match the order of entries
731 in the line header. After the first TU using this type_unit_group, the
732 line header for the subsequent TUs is recreated from this. This is done
733 because we need to use the same symtabs for each TU using the same
734 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
735 there's no guarantee the line header doesn't have duplicate entries. */
736 struct symtab
**symtabs
;
739 /* These sections are what may appear in a (real or virtual) DWO file. */
743 struct dwarf2_section_info abbrev
;
744 struct dwarf2_section_info line
;
745 struct dwarf2_section_info loc
;
746 struct dwarf2_section_info macinfo
;
747 struct dwarf2_section_info macro
;
748 struct dwarf2_section_info str
;
749 struct dwarf2_section_info str_offsets
;
750 /* In the case of a virtual DWO file, these two are unused. */
751 struct dwarf2_section_info info
;
752 VEC (dwarf2_section_info_def
) *types
;
755 /* CUs/TUs in DWP/DWO files. */
759 /* Backlink to the containing struct dwo_file. */
760 struct dwo_file
*dwo_file
;
762 /* The "id" that distinguishes this CU/TU.
763 .debug_info calls this "dwo_id", .debug_types calls this "signature".
764 Since signatures came first, we stick with it for consistency. */
767 /* The section this CU/TU lives in, in the DWO file. */
768 struct dwarf2_section_info
*section
;
770 /* Same as dwarf2_per_cu_data:{offset,length} but in the DWO section. */
774 /* For types, offset in the type's DIE of the type defined by this TU. */
775 cu_offset type_offset_in_tu
;
778 /* include/dwarf2.h defines the DWP section codes.
779 It defines a max value but it doesn't define a min value, which we
780 use for error checking, so provide one. */
782 enum dwp_v2_section_ids
787 /* Data for one DWO file.
789 This includes virtual DWO files (a virtual DWO file is a DWO file as it
790 appears in a DWP file). DWP files don't really have DWO files per se -
791 comdat folding of types "loses" the DWO file they came from, and from
792 a high level view DWP files appear to contain a mass of random types.
793 However, to maintain consistency with the non-DWP case we pretend DWP
794 files contain virtual DWO files, and we assign each TU with one virtual
795 DWO file (generally based on the line and abbrev section offsets -
796 a heuristic that seems to work in practice). */
800 /* The DW_AT_GNU_dwo_name attribute.
801 For virtual DWO files the name is constructed from the section offsets
802 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
803 from related CU+TUs. */
804 const char *dwo_name
;
806 /* The DW_AT_comp_dir attribute. */
807 const char *comp_dir
;
809 /* The bfd, when the file is open. Otherwise this is NULL.
810 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
813 /* The sections that make up this DWO file.
814 Remember that for virtual DWO files in DWP V2, these are virtual
815 sections (for lack of a better name). */
816 struct dwo_sections sections
;
818 /* The CU in the file.
819 We only support one because having more than one requires hacking the
820 dwo_name of each to match, which is highly unlikely to happen.
821 Doing this means all TUs can share comp_dir: We also assume that
822 DW_AT_comp_dir across all TUs in a DWO file will be identical. */
825 /* Table of TUs in the file.
826 Each element is a struct dwo_unit. */
830 /* These sections are what may appear in a DWP file. */
834 /* These are used by both DWP version 1 and 2. */
835 struct dwarf2_section_info str
;
836 struct dwarf2_section_info cu_index
;
837 struct dwarf2_section_info tu_index
;
839 /* These are only used by DWP version 2 files.
840 In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other
841 sections are referenced by section number, and are not recorded here.
842 In DWP version 2 there is at most one copy of all these sections, each
843 section being (effectively) comprised of the concatenation of all of the
844 individual sections that exist in the version 1 format.
845 To keep the code simple we treat each of these concatenated pieces as a
846 section itself (a virtual section?). */
847 struct dwarf2_section_info abbrev
;
848 struct dwarf2_section_info info
;
849 struct dwarf2_section_info line
;
850 struct dwarf2_section_info loc
;
851 struct dwarf2_section_info macinfo
;
852 struct dwarf2_section_info macro
;
853 struct dwarf2_section_info str_offsets
;
854 struct dwarf2_section_info types
;
857 /* These sections are what may appear in a virtual DWO file in DWP version 1.
858 A virtual DWO file is a DWO file as it appears in a DWP file. */
860 struct virtual_v1_dwo_sections
862 struct dwarf2_section_info abbrev
;
863 struct dwarf2_section_info line
;
864 struct dwarf2_section_info loc
;
865 struct dwarf2_section_info macinfo
;
866 struct dwarf2_section_info macro
;
867 struct dwarf2_section_info str_offsets
;
868 /* Each DWP hash table entry records one CU or one TU.
869 That is recorded here, and copied to dwo_unit.section. */
870 struct dwarf2_section_info info_or_types
;
873 /* Similar to virtual_v1_dwo_sections, but for DWP version 2.
874 In version 2, the sections of the DWO files are concatenated together
875 and stored in one section of that name. Thus each ELF section contains
876 several "virtual" sections. */
878 struct virtual_v2_dwo_sections
880 bfd_size_type abbrev_offset
;
881 bfd_size_type abbrev_size
;
883 bfd_size_type line_offset
;
884 bfd_size_type line_size
;
886 bfd_size_type loc_offset
;
887 bfd_size_type loc_size
;
889 bfd_size_type macinfo_offset
;
890 bfd_size_type macinfo_size
;
892 bfd_size_type macro_offset
;
893 bfd_size_type macro_size
;
895 bfd_size_type str_offsets_offset
;
896 bfd_size_type str_offsets_size
;
898 /* Each DWP hash table entry records one CU or one TU.
899 That is recorded here, and copied to dwo_unit.section. */
900 bfd_size_type info_or_types_offset
;
901 bfd_size_type info_or_types_size
;
904 /* Contents of DWP hash tables. */
906 struct dwp_hash_table
908 uint32_t version
, nr_columns
;
909 uint32_t nr_units
, nr_slots
;
910 const gdb_byte
*hash_table
, *unit_table
;
915 const gdb_byte
*indices
;
919 /* This is indexed by column number and gives the id of the section
921 #define MAX_NR_V2_DWO_SECTIONS \
922 (1 /* .debug_info or .debug_types */ \
923 + 1 /* .debug_abbrev */ \
924 + 1 /* .debug_line */ \
925 + 1 /* .debug_loc */ \
926 + 1 /* .debug_str_offsets */ \
927 + 1 /* .debug_macro or .debug_macinfo */)
928 int section_ids
[MAX_NR_V2_DWO_SECTIONS
];
929 const gdb_byte
*offsets
;
930 const gdb_byte
*sizes
;
935 /* Data for one DWP file. */
939 /* Name of the file. */
942 /* File format version. */
948 /* Section info for this file. */
949 struct dwp_sections sections
;
951 /* Table of CUs in the file. */
952 const struct dwp_hash_table
*cus
;
954 /* Table of TUs in the file. */
955 const struct dwp_hash_table
*tus
;
957 /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
961 /* Table to map ELF section numbers to their sections.
962 This is only needed for the DWP V1 file format. */
963 unsigned int num_sections
;
964 asection
**elf_sections
;
967 /* This represents a '.dwz' file. */
971 /* A dwz file can only contain a few sections. */
972 struct dwarf2_section_info abbrev
;
973 struct dwarf2_section_info info
;
974 struct dwarf2_section_info str
;
975 struct dwarf2_section_info line
;
976 struct dwarf2_section_info macro
;
977 struct dwarf2_section_info gdb_index
;
983 /* Struct used to pass misc. parameters to read_die_and_children, et
984 al. which are used for both .debug_info and .debug_types dies.
985 All parameters here are unchanging for the life of the call. This
986 struct exists to abstract away the constant parameters of die reading. */
988 struct die_reader_specs
990 /* The bfd of die_section. */
993 /* The CU of the DIE we are parsing. */
994 struct dwarf2_cu
*cu
;
996 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
997 struct dwo_file
*dwo_file
;
999 /* The section the die comes from.
1000 This is either .debug_info or .debug_types, or the .dwo variants. */
1001 struct dwarf2_section_info
*die_section
;
1003 /* die_section->buffer. */
1004 const gdb_byte
*buffer
;
1006 /* The end of the buffer. */
1007 const gdb_byte
*buffer_end
;
1009 /* The value of the DW_AT_comp_dir attribute. */
1010 const char *comp_dir
;
1013 /* Type of function passed to init_cutu_and_read_dies, et.al. */
1014 typedef void (die_reader_func_ftype
) (const struct die_reader_specs
*reader
,
1015 const gdb_byte
*info_ptr
,
1016 struct die_info
*comp_unit_die
,
1020 /* The line number information for a compilation unit (found in the
1021 .debug_line section) begins with a "statement program header",
1022 which contains the following information. */
1025 unsigned int total_length
;
1026 unsigned short version
;
1027 unsigned int header_length
;
1028 unsigned char minimum_instruction_length
;
1029 unsigned char maximum_ops_per_instruction
;
1030 unsigned char default_is_stmt
;
1032 unsigned char line_range
;
1033 unsigned char opcode_base
;
1035 /* standard_opcode_lengths[i] is the number of operands for the
1036 standard opcode whose value is i. This means that
1037 standard_opcode_lengths[0] is unused, and the last meaningful
1038 element is standard_opcode_lengths[opcode_base - 1]. */
1039 unsigned char *standard_opcode_lengths
;
1041 /* The include_directories table. NOTE! These strings are not
1042 allocated with xmalloc; instead, they are pointers into
1043 debug_line_buffer. If you try to free them, `free' will get
1045 unsigned int num_include_dirs
, include_dirs_size
;
1046 const char **include_dirs
;
1048 /* The file_names table. NOTE! These strings are not allocated
1049 with xmalloc; instead, they are pointers into debug_line_buffer.
1050 Don't try to free them directly. */
1051 unsigned int num_file_names
, file_names_size
;
1055 unsigned int dir_index
;
1056 unsigned int mod_time
;
1057 unsigned int length
;
1058 int included_p
; /* Non-zero if referenced by the Line Number Program. */
1059 struct symtab
*symtab
; /* The associated symbol table, if any. */
1062 /* The start and end of the statement program following this
1063 header. These point into dwarf2_per_objfile->line_buffer. */
1064 const gdb_byte
*statement_program_start
, *statement_program_end
;
1067 /* When we construct a partial symbol table entry we only
1068 need this much information. */
1069 struct partial_die_info
1071 /* Offset of this DIE. */
1074 /* DWARF-2 tag for this DIE. */
1075 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1077 /* Assorted flags describing the data found in this DIE. */
1078 unsigned int has_children
: 1;
1079 unsigned int is_external
: 1;
1080 unsigned int is_declaration
: 1;
1081 unsigned int has_type
: 1;
1082 unsigned int has_specification
: 1;
1083 unsigned int has_pc_info
: 1;
1084 unsigned int may_be_inlined
: 1;
1086 /* Flag set if the SCOPE field of this structure has been
1088 unsigned int scope_set
: 1;
1090 /* Flag set if the DIE has a byte_size attribute. */
1091 unsigned int has_byte_size
: 1;
1093 /* Flag set if any of the DIE's children are template arguments. */
1094 unsigned int has_template_arguments
: 1;
1096 /* Flag set if fixup_partial_die has been called on this die. */
1097 unsigned int fixup_called
: 1;
1099 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
1100 unsigned int is_dwz
: 1;
1102 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
1103 unsigned int spec_is_dwz
: 1;
1105 /* The name of this DIE. Normally the value of DW_AT_name, but
1106 sometimes a default name for unnamed DIEs. */
1109 /* The linkage name, if present. */
1110 const char *linkage_name
;
1112 /* The scope to prepend to our children. This is generally
1113 allocated on the comp_unit_obstack, so will disappear
1114 when this compilation unit leaves the cache. */
1117 /* Some data associated with the partial DIE. The tag determines
1118 which field is live. */
1121 /* The location description associated with this DIE, if any. */
1122 struct dwarf_block
*locdesc
;
1123 /* The offset of an import, for DW_TAG_imported_unit. */
1127 /* If HAS_PC_INFO, the PC range associated with this DIE. */
1131 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
1132 DW_AT_sibling, if any. */
1133 /* NOTE: This member isn't strictly necessary, read_partial_die could
1134 return DW_AT_sibling values to its caller load_partial_dies. */
1135 const gdb_byte
*sibling
;
1137 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
1138 DW_AT_specification (or DW_AT_abstract_origin or
1139 DW_AT_extension). */
1140 sect_offset spec_offset
;
1142 /* Pointers to this DIE's parent, first child, and next sibling,
1144 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
1147 /* This data structure holds the information of an abbrev. */
1150 unsigned int number
; /* number identifying abbrev */
1151 enum dwarf_tag tag
; /* dwarf tag */
1152 unsigned short has_children
; /* boolean */
1153 unsigned short num_attrs
; /* number of attributes */
1154 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
1155 struct abbrev_info
*next
; /* next in chain */
1160 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1161 ENUM_BITFIELD(dwarf_form
) form
: 16;
1164 /* Size of abbrev_table.abbrev_hash_table. */
1165 #define ABBREV_HASH_SIZE 121
1167 /* Top level data structure to contain an abbreviation table. */
1171 /* Where the abbrev table came from.
1172 This is used as a sanity check when the table is used. */
1175 /* Storage for the abbrev table. */
1176 struct obstack abbrev_obstack
;
1178 /* Hash table of abbrevs.
1179 This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
1180 It could be statically allocated, but the previous code didn't so we
1182 struct abbrev_info
**abbrevs
;
1185 /* Attributes have a name and a value. */
1188 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1189 ENUM_BITFIELD(dwarf_form
) form
: 15;
1191 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
1192 field should be in u.str (existing only for DW_STRING) but it is kept
1193 here for better struct attribute alignment. */
1194 unsigned int string_is_canonical
: 1;
1199 struct dwarf_block
*blk
;
1208 /* This data structure holds a complete die structure. */
1211 /* DWARF-2 tag for this DIE. */
1212 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1214 /* Number of attributes */
1215 unsigned char num_attrs
;
1217 /* True if we're presently building the full type name for the
1218 type derived from this DIE. */
1219 unsigned char building_fullname
: 1;
1221 /* True if this die is in process. PR 16581. */
1222 unsigned char in_process
: 1;
1225 unsigned int abbrev
;
1227 /* Offset in .debug_info or .debug_types section. */
1230 /* The dies in a compilation unit form an n-ary tree. PARENT
1231 points to this die's parent; CHILD points to the first child of
1232 this node; and all the children of a given node are chained
1233 together via their SIBLING fields. */
1234 struct die_info
*child
; /* Its first child, if any. */
1235 struct die_info
*sibling
; /* Its next sibling, if any. */
1236 struct die_info
*parent
; /* Its parent, if any. */
1238 /* An array of attributes, with NUM_ATTRS elements. There may be
1239 zero, but it's not common and zero-sized arrays are not
1240 sufficiently portable C. */
1241 struct attribute attrs
[1];
1244 /* Get at parts of an attribute structure. */
1246 #define DW_STRING(attr) ((attr)->u.str)
1247 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
1248 #define DW_UNSND(attr) ((attr)->u.unsnd)
1249 #define DW_BLOCK(attr) ((attr)->u.blk)
1250 #define DW_SND(attr) ((attr)->u.snd)
1251 #define DW_ADDR(attr) ((attr)->u.addr)
1252 #define DW_SIGNATURE(attr) ((attr)->u.signature)
1254 /* Blocks are a bunch of untyped bytes. */
1259 /* Valid only if SIZE is not zero. */
1260 const gdb_byte
*data
;
1263 #ifndef ATTR_ALLOC_CHUNK
1264 #define ATTR_ALLOC_CHUNK 4
1267 /* Allocate fields for structs, unions and enums in this size. */
1268 #ifndef DW_FIELD_ALLOC_CHUNK
1269 #define DW_FIELD_ALLOC_CHUNK 4
1272 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1273 but this would require a corresponding change in unpack_field_as_long
1275 static int bits_per_byte
= 8;
1277 /* The routines that read and process dies for a C struct or C++ class
1278 pass lists of data member fields and lists of member function fields
1279 in an instance of a field_info structure, as defined below. */
1282 /* List of data member and baseclasses fields. */
1285 struct nextfield
*next
;
1290 *fields
, *baseclasses
;
1292 /* Number of fields (including baseclasses). */
1295 /* Number of baseclasses. */
1298 /* Set if the accesibility of one of the fields is not public. */
1299 int non_public_fields
;
1301 /* Member function fields array, entries are allocated in the order they
1302 are encountered in the object file. */
1305 struct nextfnfield
*next
;
1306 struct fn_field fnfield
;
1310 /* Member function fieldlist array, contains name of possibly overloaded
1311 member function, number of overloaded member functions and a pointer
1312 to the head of the member function field chain. */
1317 struct nextfnfield
*head
;
1321 /* Number of entries in the fnfieldlists array. */
1324 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1325 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1326 struct typedef_field_list
1328 struct typedef_field field
;
1329 struct typedef_field_list
*next
;
1331 *typedef_field_list
;
1332 unsigned typedef_field_list_count
;
1335 /* One item on the queue of compilation units to read in full symbols
1337 struct dwarf2_queue_item
1339 struct dwarf2_per_cu_data
*per_cu
;
1340 enum language pretend_language
;
1341 struct dwarf2_queue_item
*next
;
1344 /* The current queue. */
1345 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
1347 /* Loaded secondary compilation units are kept in memory until they
1348 have not been referenced for the processing of this many
1349 compilation units. Set this to zero to disable caching. Cache
1350 sizes of up to at least twenty will improve startup time for
1351 typical inter-CU-reference binaries, at an obvious memory cost. */
1352 static int dwarf2_max_cache_age
= 5;
1354 show_dwarf2_max_cache_age (struct ui_file
*file
, int from_tty
,
1355 struct cmd_list_element
*c
, const char *value
)
1357 fprintf_filtered (file
, _("The upper bound on the age of cached "
1358 "dwarf2 compilation units is %s.\n"),
1362 /* local function prototypes */
1364 static const char *get_section_name (const struct dwarf2_section_info
*);
1366 static const char *get_section_file_name (const struct dwarf2_section_info
*);
1368 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
1370 static void dwarf2_find_base_address (struct die_info
*die
,
1371 struct dwarf2_cu
*cu
);
1373 static struct partial_symtab
*create_partial_symtab
1374 (struct dwarf2_per_cu_data
*per_cu
, const char *name
);
1376 static void dwarf2_build_psymtabs_hard (struct objfile
*);
1378 static void scan_partial_symbols (struct partial_die_info
*,
1379 CORE_ADDR
*, CORE_ADDR
*,
1380 int, struct dwarf2_cu
*);
1382 static void add_partial_symbol (struct partial_die_info
*,
1383 struct dwarf2_cu
*);
1385 static void add_partial_namespace (struct partial_die_info
*pdi
,
1386 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1387 int need_pc
, struct dwarf2_cu
*cu
);
1389 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1390 CORE_ADDR
*highpc
, int need_pc
,
1391 struct dwarf2_cu
*cu
);
1393 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1394 struct dwarf2_cu
*cu
);
1396 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1397 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1398 int need_pc
, struct dwarf2_cu
*cu
);
1400 static void dwarf2_read_symtab (struct partial_symtab
*,
1403 static void psymtab_to_symtab_1 (struct partial_symtab
*);
1405 static struct abbrev_info
*abbrev_table_lookup_abbrev
1406 (const struct abbrev_table
*, unsigned int);
1408 static struct abbrev_table
*abbrev_table_read_table
1409 (struct dwarf2_section_info
*, sect_offset
);
1411 static void abbrev_table_free (struct abbrev_table
*);
1413 static void abbrev_table_free_cleanup (void *);
1415 static void dwarf2_read_abbrevs (struct dwarf2_cu
*,
1416 struct dwarf2_section_info
*);
1418 static void dwarf2_free_abbrev_table (void *);
1420 static unsigned int peek_abbrev_code (bfd
*, const gdb_byte
*);
1422 static struct partial_die_info
*load_partial_dies
1423 (const struct die_reader_specs
*, const gdb_byte
*, int);
1425 static const gdb_byte
*read_partial_die (const struct die_reader_specs
*,
1426 struct partial_die_info
*,
1427 struct abbrev_info
*,
1431 static struct partial_die_info
*find_partial_die (sect_offset
, int,
1432 struct dwarf2_cu
*);
1434 static void fixup_partial_die (struct partial_die_info
*,
1435 struct dwarf2_cu
*);
1437 static const gdb_byte
*read_attribute (const struct die_reader_specs
*,
1438 struct attribute
*, struct attr_abbrev
*,
1441 static unsigned int read_1_byte (bfd
*, const gdb_byte
*);
1443 static int read_1_signed_byte (bfd
*, const gdb_byte
*);
1445 static unsigned int read_2_bytes (bfd
*, const gdb_byte
*);
1447 static unsigned int read_4_bytes (bfd
*, const gdb_byte
*);
1449 static ULONGEST
read_8_bytes (bfd
*, const gdb_byte
*);
1451 static CORE_ADDR
read_address (bfd
*, const gdb_byte
*ptr
, struct dwarf2_cu
*,
1454 static LONGEST
read_initial_length (bfd
*, const gdb_byte
*, unsigned int *);
1456 static LONGEST read_checked_initial_length_and_offset
1457 (bfd
*, const gdb_byte
*, const struct comp_unit_head
*,
1458 unsigned int *, unsigned int *);
1460 static LONGEST
read_offset (bfd
*, const gdb_byte
*,
1461 const struct comp_unit_head
*,
1464 static LONGEST
read_offset_1 (bfd
*, const gdb_byte
*, unsigned int);
1466 static sect_offset
read_abbrev_offset (struct dwarf2_section_info
*,
1469 static const gdb_byte
*read_n_bytes (bfd
*, const gdb_byte
*, unsigned int);
1471 static const char *read_direct_string (bfd
*, const gdb_byte
*, unsigned int *);
1473 static const char *read_indirect_string (bfd
*, const gdb_byte
*,
1474 const struct comp_unit_head
*,
1477 static const char *read_indirect_string_from_dwz (struct dwz_file
*, LONGEST
);
1479 static ULONGEST
read_unsigned_leb128 (bfd
*, const gdb_byte
*, unsigned int *);
1481 static LONGEST
read_signed_leb128 (bfd
*, const gdb_byte
*, unsigned int *);
1483 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*,
1487 static const char *read_str_index (const struct die_reader_specs
*reader
,
1488 ULONGEST str_index
);
1490 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1492 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1493 struct dwarf2_cu
*);
1495 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
1498 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1499 struct dwarf2_cu
*cu
);
1501 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1503 static struct die_info
*die_specification (struct die_info
*die
,
1504 struct dwarf2_cu
**);
1506 static void free_line_header (struct line_header
*lh
);
1508 static struct line_header
*dwarf_decode_line_header (unsigned int offset
,
1509 struct dwarf2_cu
*cu
);
1511 static void dwarf_decode_lines (struct line_header
*, const char *,
1512 struct dwarf2_cu
*, struct partial_symtab
*,
1515 static void dwarf2_start_subfile (const char *, const char *, const char *);
1517 static void dwarf2_start_symtab (struct dwarf2_cu
*,
1518 const char *, const char *, CORE_ADDR
);
1520 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1521 struct dwarf2_cu
*);
1523 static struct symbol
*new_symbol_full (struct die_info
*, struct type
*,
1524 struct dwarf2_cu
*, struct symbol
*);
1526 static void dwarf2_const_value (const struct attribute
*, struct symbol
*,
1527 struct dwarf2_cu
*);
1529 static void dwarf2_const_value_attr (const struct attribute
*attr
,
1532 struct obstack
*obstack
,
1533 struct dwarf2_cu
*cu
, LONGEST
*value
,
1534 const gdb_byte
**bytes
,
1535 struct dwarf2_locexpr_baton
**baton
);
1537 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1539 static int need_gnat_info (struct dwarf2_cu
*);
1541 static struct type
*die_descriptive_type (struct die_info
*,
1542 struct dwarf2_cu
*);
1544 static void set_descriptive_type (struct type
*, struct die_info
*,
1545 struct dwarf2_cu
*);
1547 static struct type
*die_containing_type (struct die_info
*,
1548 struct dwarf2_cu
*);
1550 static struct type
*lookup_die_type (struct die_info
*, const struct attribute
*,
1551 struct dwarf2_cu
*);
1553 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1555 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1557 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1559 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1560 const char *suffix
, int physname
,
1561 struct dwarf2_cu
*cu
);
1563 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1565 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1567 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1569 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1571 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1573 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1574 struct dwarf2_cu
*, struct partial_symtab
*);
1576 static int dwarf2_get_pc_bounds (struct die_info
*,
1577 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*,
1578 struct partial_symtab
*);
1580 static void get_scope_pc_bounds (struct die_info
*,
1581 CORE_ADDR
*, CORE_ADDR
*,
1582 struct dwarf2_cu
*);
1584 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1585 CORE_ADDR
, struct dwarf2_cu
*);
1587 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1588 struct dwarf2_cu
*);
1590 static void dwarf2_attach_fields_to_type (struct field_info
*,
1591 struct type
*, struct dwarf2_cu
*);
1593 static void dwarf2_add_member_fn (struct field_info
*,
1594 struct die_info
*, struct type
*,
1595 struct dwarf2_cu
*);
1597 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1599 struct dwarf2_cu
*);
1601 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1603 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1605 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1607 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1609 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1611 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1613 static struct type
*read_module_type (struct die_info
*die
,
1614 struct dwarf2_cu
*cu
);
1616 static const char *namespace_name (struct die_info
*die
,
1617 int *is_anonymous
, struct dwarf2_cu
*);
1619 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1621 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1623 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1624 struct dwarf2_cu
*);
1626 static struct die_info
*read_die_and_siblings_1
1627 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1630 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1631 const gdb_byte
*info_ptr
,
1632 const gdb_byte
**new_info_ptr
,
1633 struct die_info
*parent
);
1635 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1636 struct die_info
**, const gdb_byte
*,
1639 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1640 struct die_info
**, const gdb_byte
*,
1643 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1645 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1648 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1650 static const char *dwarf2_full_name (const char *name
,
1651 struct die_info
*die
,
1652 struct dwarf2_cu
*cu
);
1654 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1655 struct dwarf2_cu
*cu
);
1657 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1658 struct dwarf2_cu
**);
1660 static const char *dwarf_tag_name (unsigned int);
1662 static const char *dwarf_attr_name (unsigned int);
1664 static const char *dwarf_form_name (unsigned int);
1666 static char *dwarf_bool_name (unsigned int);
1668 static const char *dwarf_type_encoding_name (unsigned int);
1670 static struct die_info
*sibling_die (struct die_info
*);
1672 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1674 static void dump_die_for_error (struct die_info
*);
1676 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1679 /*static*/ void dump_die (struct die_info
*, int max_level
);
1681 static void store_in_ref_table (struct die_info
*,
1682 struct dwarf2_cu
*);
1684 static sect_offset
dwarf2_get_ref_die_offset (const struct attribute
*);
1686 static LONGEST
dwarf2_get_attr_constant_value (const struct attribute
*, int);
1688 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1689 const struct attribute
*,
1690 struct dwarf2_cu
**);
1692 static struct die_info
*follow_die_ref (struct die_info
*,
1693 const struct attribute
*,
1694 struct dwarf2_cu
**);
1696 static struct die_info
*follow_die_sig (struct die_info
*,
1697 const struct attribute
*,
1698 struct dwarf2_cu
**);
1700 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1701 struct dwarf2_cu
*);
1703 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1704 const struct attribute
*,
1705 struct dwarf2_cu
*);
1707 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1709 static void read_signatured_type (struct signatured_type
*);
1711 /* memory allocation interface */
1713 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1715 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1717 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int,
1720 static int attr_form_is_block (const struct attribute
*);
1722 static int attr_form_is_section_offset (const struct attribute
*);
1724 static int attr_form_is_constant (const struct attribute
*);
1726 static int attr_form_is_ref (const struct attribute
*);
1728 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1729 struct dwarf2_loclist_baton
*baton
,
1730 const struct attribute
*attr
);
1732 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1734 struct dwarf2_cu
*cu
,
1737 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1738 const gdb_byte
*info_ptr
,
1739 struct abbrev_info
*abbrev
);
1741 static void free_stack_comp_unit (void *);
1743 static hashval_t
partial_die_hash (const void *item
);
1745 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1747 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1748 (sect_offset offset
, unsigned int offset_in_dwz
, struct objfile
*objfile
);
1750 static void init_one_comp_unit (struct dwarf2_cu
*cu
,
1751 struct dwarf2_per_cu_data
*per_cu
);
1753 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1754 struct die_info
*comp_unit_die
,
1755 enum language pretend_language
);
1757 static void free_heap_comp_unit (void *);
1759 static void free_cached_comp_units (void *);
1761 static void age_cached_comp_units (void);
1763 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1765 static struct type
*set_die_type (struct die_info
*, struct type
*,
1766 struct dwarf2_cu
*);
1768 static void create_all_comp_units (struct objfile
*);
1770 static int create_all_type_units (struct objfile
*);
1772 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1775 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1778 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1781 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1782 struct dwarf2_per_cu_data
*);
1784 static void dwarf2_mark (struct dwarf2_cu
*);
1786 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1788 static struct type
*get_die_type_at_offset (sect_offset
,
1789 struct dwarf2_per_cu_data
*);
1791 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1793 static void dwarf2_release_queue (void *dummy
);
1795 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1796 enum language pretend_language
);
1798 static void process_queue (void);
1800 static void find_file_and_directory (struct die_info
*die
,
1801 struct dwarf2_cu
*cu
,
1802 const char **name
, const char **comp_dir
);
1804 static char *file_full_name (int file
, struct line_header
*lh
,
1805 const char *comp_dir
);
1807 static const gdb_byte
*read_and_check_comp_unit_head
1808 (struct comp_unit_head
*header
,
1809 struct dwarf2_section_info
*section
,
1810 struct dwarf2_section_info
*abbrev_section
, const gdb_byte
*info_ptr
,
1811 int is_debug_types_section
);
1813 static void init_cutu_and_read_dies
1814 (struct dwarf2_per_cu_data
*this_cu
, struct abbrev_table
*abbrev_table
,
1815 int use_existing_cu
, int keep
,
1816 die_reader_func_ftype
*die_reader_func
, void *data
);
1818 static void init_cutu_and_read_dies_simple
1819 (struct dwarf2_per_cu_data
*this_cu
,
1820 die_reader_func_ftype
*die_reader_func
, void *data
);
1822 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1824 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
1826 static struct dwo_unit
*lookup_dwo_unit_in_dwp
1827 (struct dwp_file
*dwp_file
, const char *comp_dir
,
1828 ULONGEST signature
, int is_debug_types
);
1830 static struct dwp_file
*get_dwp_file (void);
1832 static struct dwo_unit
*lookup_dwo_comp_unit
1833 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
1835 static struct dwo_unit
*lookup_dwo_type_unit
1836 (struct signatured_type
*, const char *, const char *);
1838 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
1840 static void free_dwo_file_cleanup (void *);
1842 static void process_cu_includes (void);
1844 static void check_producer (struct dwarf2_cu
*cu
);
1846 /* Various complaints about symbol reading that don't abort the process. */
1849 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
1851 complaint (&symfile_complaints
,
1852 _("statement list doesn't fit in .debug_line section"));
1856 dwarf2_debug_line_missing_file_complaint (void)
1858 complaint (&symfile_complaints
,
1859 _(".debug_line section has line data without a file"));
1863 dwarf2_debug_line_missing_end_sequence_complaint (void)
1865 complaint (&symfile_complaints
,
1866 _(".debug_line section has line "
1867 "program sequence without an end"));
1871 dwarf2_complex_location_expr_complaint (void)
1873 complaint (&symfile_complaints
, _("location expression too complex"));
1877 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
1880 complaint (&symfile_complaints
,
1881 _("const value length mismatch for '%s', got %d, expected %d"),
1886 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
1888 complaint (&symfile_complaints
,
1889 _("debug info runs off end of %s section"
1891 get_section_name (section
),
1892 get_section_file_name (section
));
1896 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
1898 complaint (&symfile_complaints
,
1899 _("macro debug info contains a "
1900 "malformed macro definition:\n`%s'"),
1905 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
1907 complaint (&symfile_complaints
,
1908 _("invalid attribute class or form for '%s' in '%s'"),
1914 /* Convert VALUE between big- and little-endian. */
1916 byte_swap (offset_type value
)
1920 result
= (value
& 0xff) << 24;
1921 result
|= (value
& 0xff00) << 8;
1922 result
|= (value
& 0xff0000) >> 8;
1923 result
|= (value
& 0xff000000) >> 24;
1927 #define MAYBE_SWAP(V) byte_swap (V)
1930 #define MAYBE_SWAP(V) (V)
1931 #endif /* WORDS_BIGENDIAN */
1933 /* Read the given attribute value as an address, taking the attribute's
1934 form into account. */
1937 attr_value_as_address (struct attribute
*attr
)
1941 if (attr
->form
!= DW_FORM_addr
&& attr
->form
!= DW_FORM_GNU_addr_index
)
1943 /* Aside from a few clearly defined exceptions, attributes that
1944 contain an address must always be in DW_FORM_addr form.
1945 Unfortunately, some compilers happen to be violating this
1946 requirement by encoding addresses using other forms, such
1947 as DW_FORM_data4 for example. For those broken compilers,
1948 we try to do our best, without any guarantee of success,
1949 to interpret the address correctly. It would also be nice
1950 to generate a complaint, but that would require us to maintain
1951 a list of legitimate cases where a non-address form is allowed,
1952 as well as update callers to pass in at least the CU's DWARF
1953 version. This is more overhead than what we're willing to
1954 expand for a pretty rare case. */
1955 addr
= DW_UNSND (attr
);
1958 addr
= DW_ADDR (attr
);
1963 /* The suffix for an index file. */
1964 #define INDEX_SUFFIX ".gdb-index"
1966 /* Try to locate the sections we need for DWARF 2 debugging
1967 information and return true if we have enough to do something.
1968 NAMES points to the dwarf2 section names, or is NULL if the standard
1969 ELF names are used. */
1972 dwarf2_has_info (struct objfile
*objfile
,
1973 const struct dwarf2_debug_sections
*names
)
1975 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
1976 if (!dwarf2_per_objfile
)
1978 /* Initialize per-objfile state. */
1979 struct dwarf2_per_objfile
*data
1980 = obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
1982 memset (data
, 0, sizeof (*data
));
1983 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
1984 dwarf2_per_objfile
= data
;
1986 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
,
1988 dwarf2_per_objfile
->objfile
= objfile
;
1990 return (!dwarf2_per_objfile
->info
.is_virtual
1991 && dwarf2_per_objfile
->info
.s
.asection
!= NULL
1992 && !dwarf2_per_objfile
->abbrev
.is_virtual
1993 && dwarf2_per_objfile
->abbrev
.s
.asection
!= NULL
);
1996 /* Return the containing section of virtual section SECTION. */
1998 static struct dwarf2_section_info
*
1999 get_containing_section (const struct dwarf2_section_info
*section
)
2001 gdb_assert (section
->is_virtual
);
2002 return section
->s
.containing_section
;
2005 /* Return the bfd owner of SECTION. */
2008 get_section_bfd_owner (const struct dwarf2_section_info
*section
)
2010 if (section
->is_virtual
)
2012 section
= get_containing_section (section
);
2013 gdb_assert (!section
->is_virtual
);
2015 return section
->s
.asection
->owner
;
2018 /* Return the bfd section of SECTION.
2019 Returns NULL if the section is not present. */
2022 get_section_bfd_section (const struct dwarf2_section_info
*section
)
2024 if (section
->is_virtual
)
2026 section
= get_containing_section (section
);
2027 gdb_assert (!section
->is_virtual
);
2029 return section
->s
.asection
;
2032 /* Return the name of SECTION. */
2035 get_section_name (const struct dwarf2_section_info
*section
)
2037 asection
*sectp
= get_section_bfd_section (section
);
2039 gdb_assert (sectp
!= NULL
);
2040 return bfd_section_name (get_section_bfd_owner (section
), sectp
);
2043 /* Return the name of the file SECTION is in. */
2046 get_section_file_name (const struct dwarf2_section_info
*section
)
2048 bfd
*abfd
= get_section_bfd_owner (section
);
2050 return bfd_get_filename (abfd
);
2053 /* Return the id of SECTION.
2054 Returns 0 if SECTION doesn't exist. */
2057 get_section_id (const struct dwarf2_section_info
*section
)
2059 asection
*sectp
= get_section_bfd_section (section
);
2066 /* Return the flags of SECTION.
2067 SECTION (or containing section if this is a virtual section) must exist. */
2070 get_section_flags (const struct dwarf2_section_info
*section
)
2072 asection
*sectp
= get_section_bfd_section (section
);
2074 gdb_assert (sectp
!= NULL
);
2075 return bfd_get_section_flags (sectp
->owner
, sectp
);
2078 /* When loading sections, we look either for uncompressed section or for
2079 compressed section names. */
2082 section_is_p (const char *section_name
,
2083 const struct dwarf2_section_names
*names
)
2085 if (names
->normal
!= NULL
2086 && strcmp (section_name
, names
->normal
) == 0)
2088 if (names
->compressed
!= NULL
2089 && strcmp (section_name
, names
->compressed
) == 0)
2094 /* This function is mapped across the sections and remembers the
2095 offset and size of each of the debugging sections we are interested
2099 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *vnames
)
2101 const struct dwarf2_debug_sections
*names
;
2102 flagword aflag
= bfd_get_section_flags (abfd
, sectp
);
2105 names
= &dwarf2_elf_names
;
2107 names
= (const struct dwarf2_debug_sections
*) vnames
;
2109 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
2112 else if (section_is_p (sectp
->name
, &names
->info
))
2114 dwarf2_per_objfile
->info
.s
.asection
= sectp
;
2115 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
2117 else if (section_is_p (sectp
->name
, &names
->abbrev
))
2119 dwarf2_per_objfile
->abbrev
.s
.asection
= sectp
;
2120 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
2122 else if (section_is_p (sectp
->name
, &names
->line
))
2124 dwarf2_per_objfile
->line
.s
.asection
= sectp
;
2125 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
2127 else if (section_is_p (sectp
->name
, &names
->loc
))
2129 dwarf2_per_objfile
->loc
.s
.asection
= sectp
;
2130 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
2132 else if (section_is_p (sectp
->name
, &names
->macinfo
))
2134 dwarf2_per_objfile
->macinfo
.s
.asection
= sectp
;
2135 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
2137 else if (section_is_p (sectp
->name
, &names
->macro
))
2139 dwarf2_per_objfile
->macro
.s
.asection
= sectp
;
2140 dwarf2_per_objfile
->macro
.size
= bfd_get_section_size (sectp
);
2142 else if (section_is_p (sectp
->name
, &names
->str
))
2144 dwarf2_per_objfile
->str
.s
.asection
= sectp
;
2145 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
2147 else if (section_is_p (sectp
->name
, &names
->addr
))
2149 dwarf2_per_objfile
->addr
.s
.asection
= sectp
;
2150 dwarf2_per_objfile
->addr
.size
= bfd_get_section_size (sectp
);
2152 else if (section_is_p (sectp
->name
, &names
->frame
))
2154 dwarf2_per_objfile
->frame
.s
.asection
= sectp
;
2155 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
2157 else if (section_is_p (sectp
->name
, &names
->eh_frame
))
2159 dwarf2_per_objfile
->eh_frame
.s
.asection
= sectp
;
2160 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
2162 else if (section_is_p (sectp
->name
, &names
->ranges
))
2164 dwarf2_per_objfile
->ranges
.s
.asection
= sectp
;
2165 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
2167 else if (section_is_p (sectp
->name
, &names
->types
))
2169 struct dwarf2_section_info type_section
;
2171 memset (&type_section
, 0, sizeof (type_section
));
2172 type_section
.s
.asection
= sectp
;
2173 type_section
.size
= bfd_get_section_size (sectp
);
2175 VEC_safe_push (dwarf2_section_info_def
, dwarf2_per_objfile
->types
,
2178 else if (section_is_p (sectp
->name
, &names
->gdb_index
))
2180 dwarf2_per_objfile
->gdb_index
.s
.asection
= sectp
;
2181 dwarf2_per_objfile
->gdb_index
.size
= bfd_get_section_size (sectp
);
2184 if ((bfd_get_section_flags (abfd
, sectp
) & SEC_LOAD
)
2185 && bfd_section_vma (abfd
, sectp
) == 0)
2186 dwarf2_per_objfile
->has_section_at_zero
= 1;
2189 /* A helper function that decides whether a section is empty,
2193 dwarf2_section_empty_p (const struct dwarf2_section_info
*section
)
2195 if (section
->is_virtual
)
2196 return section
->size
== 0;
2197 return section
->s
.asection
== NULL
|| section
->size
== 0;
2200 /* Read the contents of the section INFO.
2201 OBJFILE is the main object file, but not necessarily the file where
2202 the section comes from. E.g., for DWO files the bfd of INFO is the bfd
2204 If the section is compressed, uncompress it before returning. */
2207 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
2211 gdb_byte
*buf
, *retbuf
;
2215 info
->buffer
= NULL
;
2218 if (dwarf2_section_empty_p (info
))
2221 sectp
= get_section_bfd_section (info
);
2223 /* If this is a virtual section we need to read in the real one first. */
2224 if (info
->is_virtual
)
2226 struct dwarf2_section_info
*containing_section
=
2227 get_containing_section (info
);
2229 gdb_assert (sectp
!= NULL
);
2230 if ((sectp
->flags
& SEC_RELOC
) != 0)
2232 error (_("Dwarf Error: DWP format V2 with relocations is not"
2233 " supported in section %s [in module %s]"),
2234 get_section_name (info
), get_section_file_name (info
));
2236 dwarf2_read_section (objfile
, containing_section
);
2237 /* Other code should have already caught virtual sections that don't
2239 gdb_assert (info
->virtual_offset
+ info
->size
2240 <= containing_section
->size
);
2241 /* If the real section is empty or there was a problem reading the
2242 section we shouldn't get here. */
2243 gdb_assert (containing_section
->buffer
!= NULL
);
2244 info
->buffer
= containing_section
->buffer
+ info
->virtual_offset
;
2248 /* If the section has relocations, we must read it ourselves.
2249 Otherwise we attach it to the BFD. */
2250 if ((sectp
->flags
& SEC_RELOC
) == 0)
2252 info
->buffer
= gdb_bfd_map_section (sectp
, &info
->size
);
2256 buf
= obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
2259 /* When debugging .o files, we may need to apply relocations; see
2260 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
2261 We never compress sections in .o files, so we only need to
2262 try this when the section is not compressed. */
2263 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
2266 info
->buffer
= retbuf
;
2270 abfd
= get_section_bfd_owner (info
);
2271 gdb_assert (abfd
!= NULL
);
2273 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
2274 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
2276 error (_("Dwarf Error: Can't read DWARF data"
2277 " in section %s [in module %s]"),
2278 bfd_section_name (abfd
, sectp
), bfd_get_filename (abfd
));
2282 /* A helper function that returns the size of a section in a safe way.
2283 If you are positive that the section has been read before using the
2284 size, then it is safe to refer to the dwarf2_section_info object's
2285 "size" field directly. In other cases, you must call this
2286 function, because for compressed sections the size field is not set
2287 correctly until the section has been read. */
2289 static bfd_size_type
2290 dwarf2_section_size (struct objfile
*objfile
,
2291 struct dwarf2_section_info
*info
)
2294 dwarf2_read_section (objfile
, info
);
2298 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2302 dwarf2_get_section_info (struct objfile
*objfile
,
2303 enum dwarf2_section_enum sect
,
2304 asection
**sectp
, const gdb_byte
**bufp
,
2305 bfd_size_type
*sizep
)
2307 struct dwarf2_per_objfile
*data
2308 = objfile_data (objfile
, dwarf2_objfile_data_key
);
2309 struct dwarf2_section_info
*info
;
2311 /* We may see an objfile without any DWARF, in which case we just
2322 case DWARF2_DEBUG_FRAME
:
2323 info
= &data
->frame
;
2325 case DWARF2_EH_FRAME
:
2326 info
= &data
->eh_frame
;
2329 gdb_assert_not_reached ("unexpected section");
2332 dwarf2_read_section (objfile
, info
);
2334 *sectp
= get_section_bfd_section (info
);
2335 *bufp
= info
->buffer
;
2336 *sizep
= info
->size
;
2339 /* A helper function to find the sections for a .dwz file. */
2342 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2344 struct dwz_file
*dwz_file
= arg
;
2346 /* Note that we only support the standard ELF names, because .dwz
2347 is ELF-only (at the time of writing). */
2348 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2350 dwz_file
->abbrev
.s
.asection
= sectp
;
2351 dwz_file
->abbrev
.size
= bfd_get_section_size (sectp
);
2353 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2355 dwz_file
->info
.s
.asection
= sectp
;
2356 dwz_file
->info
.size
= bfd_get_section_size (sectp
);
2358 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2360 dwz_file
->str
.s
.asection
= sectp
;
2361 dwz_file
->str
.size
= bfd_get_section_size (sectp
);
2363 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2365 dwz_file
->line
.s
.asection
= sectp
;
2366 dwz_file
->line
.size
= bfd_get_section_size (sectp
);
2368 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2370 dwz_file
->macro
.s
.asection
= sectp
;
2371 dwz_file
->macro
.size
= bfd_get_section_size (sectp
);
2373 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2375 dwz_file
->gdb_index
.s
.asection
= sectp
;
2376 dwz_file
->gdb_index
.size
= bfd_get_section_size (sectp
);
2380 /* Open the separate '.dwz' debug file, if needed. Return NULL if
2381 there is no .gnu_debugaltlink section in the file. Error if there
2382 is such a section but the file cannot be found. */
2384 static struct dwz_file
*
2385 dwarf2_get_dwz_file (void)
2389 struct cleanup
*cleanup
;
2390 const char *filename
;
2391 struct dwz_file
*result
;
2392 bfd_size_type buildid_len_arg
;
2396 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2397 return dwarf2_per_objfile
->dwz_file
;
2399 bfd_set_error (bfd_error_no_error
);
2400 data
= bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2401 &buildid_len_arg
, &buildid
);
2404 if (bfd_get_error () == bfd_error_no_error
)
2406 error (_("could not read '.gnu_debugaltlink' section: %s"),
2407 bfd_errmsg (bfd_get_error ()));
2409 cleanup
= make_cleanup (xfree
, data
);
2410 make_cleanup (xfree
, buildid
);
2412 buildid_len
= (size_t) buildid_len_arg
;
2414 filename
= (const char *) data
;
2415 if (!IS_ABSOLUTE_PATH (filename
))
2417 char *abs
= gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2420 make_cleanup (xfree
, abs
);
2421 abs
= ldirname (abs
);
2422 make_cleanup (xfree
, abs
);
2424 rel
= concat (abs
, SLASH_STRING
, filename
, (char *) NULL
);
2425 make_cleanup (xfree
, rel
);
2429 /* First try the file name given in the section. If that doesn't
2430 work, try to use the build-id instead. */
2431 dwz_bfd
= gdb_bfd_open (filename
, gnutarget
, -1);
2432 if (dwz_bfd
!= NULL
)
2434 if (!build_id_verify (dwz_bfd
, buildid_len
, buildid
))
2436 gdb_bfd_unref (dwz_bfd
);
2441 if (dwz_bfd
== NULL
)
2442 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2444 if (dwz_bfd
== NULL
)
2445 error (_("could not find '.gnu_debugaltlink' file for %s"),
2446 objfile_name (dwarf2_per_objfile
->objfile
));
2448 result
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
2450 result
->dwz_bfd
= dwz_bfd
;
2452 bfd_map_over_sections (dwz_bfd
, locate_dwz_sections
, result
);
2454 do_cleanups (cleanup
);
2456 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, dwz_bfd
);
2457 dwarf2_per_objfile
->dwz_file
= result
;
2461 /* DWARF quick_symbols_functions support. */
2463 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2464 unique line tables, so we maintain a separate table of all .debug_line
2465 derived entries to support the sharing.
2466 All the quick functions need is the list of file names. We discard the
2467 line_header when we're done and don't need to record it here. */
2468 struct quick_file_names
2470 /* The data used to construct the hash key. */
2471 struct stmt_list_hash hash
;
2473 /* The number of entries in file_names, real_names. */
2474 unsigned int num_file_names
;
2476 /* The file names from the line table, after being run through
2478 const char **file_names
;
2480 /* The file names from the line table after being run through
2481 gdb_realpath. These are computed lazily. */
2482 const char **real_names
;
2485 /* When using the index (and thus not using psymtabs), each CU has an
2486 object of this type. This is used to hold information needed by
2487 the various "quick" methods. */
2488 struct dwarf2_per_cu_quick_data
2490 /* The file table. This can be NULL if there was no file table
2491 or it's currently not read in.
2492 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2493 struct quick_file_names
*file_names
;
2495 /* The corresponding symbol table. This is NULL if symbols for this
2496 CU have not yet been read. */
2497 struct symtab
*symtab
;
2499 /* A temporary mark bit used when iterating over all CUs in
2500 expand_symtabs_matching. */
2501 unsigned int mark
: 1;
2503 /* True if we've tried to read the file table and found there isn't one.
2504 There will be no point in trying to read it again next time. */
2505 unsigned int no_file_data
: 1;
2508 /* Utility hash function for a stmt_list_hash. */
2511 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2515 if (stmt_list_hash
->dwo_unit
!= NULL
)
2516 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2517 v
+= stmt_list_hash
->line_offset
.sect_off
;
2521 /* Utility equality function for a stmt_list_hash. */
2524 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2525 const struct stmt_list_hash
*rhs
)
2527 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2529 if (lhs
->dwo_unit
!= NULL
2530 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2533 return lhs
->line_offset
.sect_off
== rhs
->line_offset
.sect_off
;
2536 /* Hash function for a quick_file_names. */
2539 hash_file_name_entry (const void *e
)
2541 const struct quick_file_names
*file_data
= e
;
2543 return hash_stmt_list_entry (&file_data
->hash
);
2546 /* Equality function for a quick_file_names. */
2549 eq_file_name_entry (const void *a
, const void *b
)
2551 const struct quick_file_names
*ea
= a
;
2552 const struct quick_file_names
*eb
= b
;
2554 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2557 /* Delete function for a quick_file_names. */
2560 delete_file_name_entry (void *e
)
2562 struct quick_file_names
*file_data
= e
;
2565 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2567 xfree ((void*) file_data
->file_names
[i
]);
2568 if (file_data
->real_names
)
2569 xfree ((void*) file_data
->real_names
[i
]);
2572 /* The space for the struct itself lives on objfile_obstack,
2573 so we don't free it here. */
2576 /* Create a quick_file_names hash table. */
2579 create_quick_file_names_table (unsigned int nr_initial_entries
)
2581 return htab_create_alloc (nr_initial_entries
,
2582 hash_file_name_entry
, eq_file_name_entry
,
2583 delete_file_name_entry
, xcalloc
, xfree
);
2586 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2587 have to be created afterwards. You should call age_cached_comp_units after
2588 processing PER_CU->CU. dw2_setup must have been already called. */
2591 load_cu (struct dwarf2_per_cu_data
*per_cu
)
2593 if (per_cu
->is_debug_types
)
2594 load_full_type_unit (per_cu
);
2596 load_full_comp_unit (per_cu
, language_minimal
);
2598 gdb_assert (per_cu
->cu
!= NULL
);
2600 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2603 /* Read in the symbols for PER_CU. */
2606 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2608 struct cleanup
*back_to
;
2610 /* Skip type_unit_groups, reading the type units they contain
2611 is handled elsewhere. */
2612 if (IS_TYPE_UNIT_GROUP (per_cu
))
2615 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
2617 if (dwarf2_per_objfile
->using_index
2618 ? per_cu
->v
.quick
->symtab
== NULL
2619 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2621 queue_comp_unit (per_cu
, language_minimal
);
2624 /* If we just loaded a CU from a DWO, and we're working with an index
2625 that may badly handle TUs, load all the TUs in that DWO as well.
2626 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2627 if (!per_cu
->is_debug_types
2628 && per_cu
->cu
->dwo_unit
!= NULL
2629 && dwarf2_per_objfile
->index_table
!= NULL
2630 && dwarf2_per_objfile
->index_table
->version
<= 7
2631 /* DWP files aren't supported yet. */
2632 && get_dwp_file () == NULL
)
2633 queue_and_load_all_dwo_tus (per_cu
);
2638 /* Age the cache, releasing compilation units that have not
2639 been used recently. */
2640 age_cached_comp_units ();
2642 do_cleanups (back_to
);
2645 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2646 the objfile from which this CU came. Returns the resulting symbol
2649 static struct symtab
*
2650 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2652 gdb_assert (dwarf2_per_objfile
->using_index
);
2653 if (!per_cu
->v
.quick
->symtab
)
2655 struct cleanup
*back_to
= make_cleanup (free_cached_comp_units
, NULL
);
2656 increment_reading_symtab ();
2657 dw2_do_instantiate_symtab (per_cu
);
2658 process_cu_includes ();
2659 do_cleanups (back_to
);
2661 return per_cu
->v
.quick
->symtab
;
2664 /* Return the CU/TU given its index.
2666 This is intended for loops like:
2668 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2669 + dwarf2_per_objfile->n_type_units); ++i)
2671 struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i);
2677 static struct dwarf2_per_cu_data
*
2678 dw2_get_cutu (int index
)
2680 if (index
>= dwarf2_per_objfile
->n_comp_units
)
2682 index
-= dwarf2_per_objfile
->n_comp_units
;
2683 gdb_assert (index
< dwarf2_per_objfile
->n_type_units
);
2684 return &dwarf2_per_objfile
->all_type_units
[index
]->per_cu
;
2687 return dwarf2_per_objfile
->all_comp_units
[index
];
2690 /* Return the CU given its index.
2691 This differs from dw2_get_cutu in that it's for when you know INDEX
2694 static struct dwarf2_per_cu_data
*
2695 dw2_get_cu (int index
)
2697 gdb_assert (index
>= 0 && index
< dwarf2_per_objfile
->n_comp_units
);
2699 return dwarf2_per_objfile
->all_comp_units
[index
];
2702 /* A helper for create_cus_from_index that handles a given list of
2706 create_cus_from_index_list (struct objfile
*objfile
,
2707 const gdb_byte
*cu_list
, offset_type n_elements
,
2708 struct dwarf2_section_info
*section
,
2714 for (i
= 0; i
< n_elements
; i
+= 2)
2716 struct dwarf2_per_cu_data
*the_cu
;
2717 ULONGEST offset
, length
;
2719 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2720 offset
= extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2721 length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2724 the_cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2725 struct dwarf2_per_cu_data
);
2726 the_cu
->offset
.sect_off
= offset
;
2727 the_cu
->length
= length
;
2728 the_cu
->objfile
= objfile
;
2729 the_cu
->section
= section
;
2730 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2731 struct dwarf2_per_cu_quick_data
);
2732 the_cu
->is_dwz
= is_dwz
;
2733 dwarf2_per_objfile
->all_comp_units
[base_offset
+ i
/ 2] = the_cu
;
2737 /* Read the CU list from the mapped index, and use it to create all
2738 the CU objects for this objfile. */
2741 create_cus_from_index (struct objfile
*objfile
,
2742 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
2743 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
2745 struct dwz_file
*dwz
;
2747 dwarf2_per_objfile
->n_comp_units
= (cu_list_elements
+ dwz_elements
) / 2;
2748 dwarf2_per_objfile
->all_comp_units
2749 = obstack_alloc (&objfile
->objfile_obstack
,
2750 dwarf2_per_objfile
->n_comp_units
2751 * sizeof (struct dwarf2_per_cu_data
*));
2753 create_cus_from_index_list (objfile
, cu_list
, cu_list_elements
,
2754 &dwarf2_per_objfile
->info
, 0, 0);
2756 if (dwz_elements
== 0)
2759 dwz
= dwarf2_get_dwz_file ();
2760 create_cus_from_index_list (objfile
, dwz_list
, dwz_elements
, &dwz
->info
, 1,
2761 cu_list_elements
/ 2);
2764 /* Create the signatured type hash table from the index. */
2767 create_signatured_type_table_from_index (struct objfile
*objfile
,
2768 struct dwarf2_section_info
*section
,
2769 const gdb_byte
*bytes
,
2770 offset_type elements
)
2773 htab_t sig_types_hash
;
2775 dwarf2_per_objfile
->n_type_units
= elements
/ 3;
2776 dwarf2_per_objfile
->all_type_units
2777 = xmalloc (dwarf2_per_objfile
->n_type_units
2778 * sizeof (struct signatured_type
*));
2780 sig_types_hash
= allocate_signatured_type_table (objfile
);
2782 for (i
= 0; i
< elements
; i
+= 3)
2784 struct signatured_type
*sig_type
;
2785 ULONGEST offset
, type_offset_in_tu
, signature
;
2788 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2789 offset
= extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
2790 type_offset_in_tu
= extract_unsigned_integer (bytes
+ 8, 8,
2792 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
2795 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2796 struct signatured_type
);
2797 sig_type
->signature
= signature
;
2798 sig_type
->type_offset_in_tu
.cu_off
= type_offset_in_tu
;
2799 sig_type
->per_cu
.is_debug_types
= 1;
2800 sig_type
->per_cu
.section
= section
;
2801 sig_type
->per_cu
.offset
.sect_off
= offset
;
2802 sig_type
->per_cu
.objfile
= objfile
;
2803 sig_type
->per_cu
.v
.quick
2804 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2805 struct dwarf2_per_cu_quick_data
);
2807 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
2810 dwarf2_per_objfile
->all_type_units
[i
/ 3] = sig_type
;
2813 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
2816 /* Read the address map data from the mapped index, and use it to
2817 populate the objfile's psymtabs_addrmap. */
2820 create_addrmap_from_index (struct objfile
*objfile
, struct mapped_index
*index
)
2822 const gdb_byte
*iter
, *end
;
2823 struct obstack temp_obstack
;
2824 struct addrmap
*mutable_map
;
2825 struct cleanup
*cleanup
;
2828 obstack_init (&temp_obstack
);
2829 cleanup
= make_cleanup_obstack_free (&temp_obstack
);
2830 mutable_map
= addrmap_create_mutable (&temp_obstack
);
2832 iter
= index
->address_table
;
2833 end
= iter
+ index
->address_table_size
;
2835 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2839 ULONGEST hi
, lo
, cu_index
;
2840 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2842 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2844 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
2849 complaint (&symfile_complaints
,
2850 _(".gdb_index address table has invalid range (%s - %s)"),
2851 hex_string (lo
), hex_string (hi
));
2855 if (cu_index
>= dwarf2_per_objfile
->n_comp_units
)
2857 complaint (&symfile_complaints
,
2858 _(".gdb_index address table has invalid CU number %u"),
2859 (unsigned) cu_index
);
2863 addrmap_set_empty (mutable_map
, lo
+ baseaddr
, hi
+ baseaddr
- 1,
2864 dw2_get_cutu (cu_index
));
2867 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
2868 &objfile
->objfile_obstack
);
2869 do_cleanups (cleanup
);
2872 /* The hash function for strings in the mapped index. This is the same as
2873 SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the
2874 implementation. This is necessary because the hash function is tied to the
2875 format of the mapped index file. The hash values do not have to match with
2878 Use INT_MAX for INDEX_VERSION if you generate the current index format. */
2881 mapped_index_string_hash (int index_version
, const void *p
)
2883 const unsigned char *str
= (const unsigned char *) p
;
2887 while ((c
= *str
++) != 0)
2889 if (index_version
>= 5)
2891 r
= r
* 67 + c
- 113;
2897 /* Find a slot in the mapped index INDEX for the object named NAME.
2898 If NAME is found, set *VEC_OUT to point to the CU vector in the
2899 constant pool and return 1. If NAME cannot be found, return 0. */
2902 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
2903 offset_type
**vec_out
)
2905 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
2907 offset_type slot
, step
;
2908 int (*cmp
) (const char *, const char *);
2910 if (current_language
->la_language
== language_cplus
2911 || current_language
->la_language
== language_java
2912 || current_language
->la_language
== language_fortran
)
2914 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
2916 const char *paren
= strchr (name
, '(');
2922 dup
= xmalloc (paren
- name
+ 1);
2923 memcpy (dup
, name
, paren
- name
);
2924 dup
[paren
- name
] = 0;
2926 make_cleanup (xfree
, dup
);
2931 /* Index version 4 did not support case insensitive searches. But the
2932 indices for case insensitive languages are built in lowercase, therefore
2933 simulate our NAME being searched is also lowercased. */
2934 hash
= mapped_index_string_hash ((index
->version
== 4
2935 && case_sensitivity
== case_sensitive_off
2936 ? 5 : index
->version
),
2939 slot
= hash
& (index
->symbol_table_slots
- 1);
2940 step
= ((hash
* 17) & (index
->symbol_table_slots
- 1)) | 1;
2941 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
2945 /* Convert a slot number to an offset into the table. */
2946 offset_type i
= 2 * slot
;
2948 if (index
->symbol_table
[i
] == 0 && index
->symbol_table
[i
+ 1] == 0)
2950 do_cleanups (back_to
);
2954 str
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[i
]);
2955 if (!cmp (name
, str
))
2957 *vec_out
= (offset_type
*) (index
->constant_pool
2958 + MAYBE_SWAP (index
->symbol_table
[i
+ 1]));
2959 do_cleanups (back_to
);
2963 slot
= (slot
+ step
) & (index
->symbol_table_slots
- 1);
2967 /* A helper function that reads the .gdb_index from SECTION and fills
2968 in MAP. FILENAME is the name of the file containing the section;
2969 it is used for error reporting. DEPRECATED_OK is nonzero if it is
2970 ok to use deprecated sections.
2972 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
2973 out parameters that are filled in with information about the CU and
2974 TU lists in the section.
2976 Returns 1 if all went well, 0 otherwise. */
2979 read_index_from_section (struct objfile
*objfile
,
2980 const char *filename
,
2982 struct dwarf2_section_info
*section
,
2983 struct mapped_index
*map
,
2984 const gdb_byte
**cu_list
,
2985 offset_type
*cu_list_elements
,
2986 const gdb_byte
**types_list
,
2987 offset_type
*types_list_elements
)
2989 const gdb_byte
*addr
;
2990 offset_type version
;
2991 offset_type
*metadata
;
2994 if (dwarf2_section_empty_p (section
))
2997 /* Older elfutils strip versions could keep the section in the main
2998 executable while splitting it for the separate debug info file. */
2999 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
3002 dwarf2_read_section (objfile
, section
);
3004 addr
= section
->buffer
;
3005 /* Version check. */
3006 version
= MAYBE_SWAP (*(offset_type
*) addr
);
3007 /* Versions earlier than 3 emitted every copy of a psymbol. This
3008 causes the index to behave very poorly for certain requests. Version 3
3009 contained incomplete addrmap. So, it seems better to just ignore such
3013 static int warning_printed
= 0;
3014 if (!warning_printed
)
3016 warning (_("Skipping obsolete .gdb_index section in %s."),
3018 warning_printed
= 1;
3022 /* Index version 4 uses a different hash function than index version
3025 Versions earlier than 6 did not emit psymbols for inlined
3026 functions. Using these files will cause GDB not to be able to
3027 set breakpoints on inlined functions by name, so we ignore these
3028 indices unless the user has done
3029 "set use-deprecated-index-sections on". */
3030 if (version
< 6 && !deprecated_ok
)
3032 static int warning_printed
= 0;
3033 if (!warning_printed
)
3036 Skipping deprecated .gdb_index section in %s.\n\
3037 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3038 to use the section anyway."),
3040 warning_printed
= 1;
3044 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3045 of the TU (for symbols coming from TUs),
3046 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3047 Plus gold-generated indices can have duplicate entries for global symbols,
3048 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3049 These are just performance bugs, and we can't distinguish gdb-generated
3050 indices from gold-generated ones, so issue no warning here. */
3052 /* Indexes with higher version than the one supported by GDB may be no
3053 longer backward compatible. */
3057 map
->version
= version
;
3058 map
->total_size
= section
->size
;
3060 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3063 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3064 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3068 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3069 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3070 - MAYBE_SWAP (metadata
[i
]))
3074 map
->address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3075 map
->address_table_size
= (MAYBE_SWAP (metadata
[i
+ 1])
3076 - MAYBE_SWAP (metadata
[i
]));
3079 map
->symbol_table
= (offset_type
*) (addr
+ MAYBE_SWAP (metadata
[i
]));
3080 map
->symbol_table_slots
= ((MAYBE_SWAP (metadata
[i
+ 1])
3081 - MAYBE_SWAP (metadata
[i
]))
3082 / (2 * sizeof (offset_type
)));
3085 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3091 /* Read the index file. If everything went ok, initialize the "quick"
3092 elements of all the CUs and return 1. Otherwise, return 0. */
3095 dwarf2_read_index (struct objfile
*objfile
)
3097 struct mapped_index local_map
, *map
;
3098 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3099 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3100 struct dwz_file
*dwz
;
3102 if (!read_index_from_section (objfile
, objfile_name (objfile
),
3103 use_deprecated_index_sections
,
3104 &dwarf2_per_objfile
->gdb_index
, &local_map
,
3105 &cu_list
, &cu_list_elements
,
3106 &types_list
, &types_list_elements
))
3109 /* Don't use the index if it's empty. */
3110 if (local_map
.symbol_table_slots
== 0)
3113 /* If there is a .dwz file, read it so we can get its CU list as
3115 dwz
= dwarf2_get_dwz_file ();
3118 struct mapped_index dwz_map
;
3119 const gdb_byte
*dwz_types_ignore
;
3120 offset_type dwz_types_elements_ignore
;
3122 if (!read_index_from_section (objfile
, bfd_get_filename (dwz
->dwz_bfd
),
3124 &dwz
->gdb_index
, &dwz_map
,
3125 &dwz_list
, &dwz_list_elements
,
3127 &dwz_types_elements_ignore
))
3129 warning (_("could not read '.gdb_index' section from %s; skipping"),
3130 bfd_get_filename (dwz
->dwz_bfd
));
3135 create_cus_from_index (objfile
, cu_list
, cu_list_elements
, dwz_list
,
3138 if (types_list_elements
)
3140 struct dwarf2_section_info
*section
;
3142 /* We can only handle a single .debug_types when we have an
3144 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
3147 section
= VEC_index (dwarf2_section_info_def
,
3148 dwarf2_per_objfile
->types
, 0);
3150 create_signatured_type_table_from_index (objfile
, section
, types_list
,
3151 types_list_elements
);
3154 create_addrmap_from_index (objfile
, &local_map
);
3156 map
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct mapped_index
));
3159 dwarf2_per_objfile
->index_table
= map
;
3160 dwarf2_per_objfile
->using_index
= 1;
3161 dwarf2_per_objfile
->quick_file_names_table
=
3162 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
3167 /* A helper for the "quick" functions which sets the global
3168 dwarf2_per_objfile according to OBJFILE. */
3171 dw2_setup (struct objfile
*objfile
)
3173 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
3174 gdb_assert (dwarf2_per_objfile
);
3177 /* die_reader_func for dw2_get_file_names. */
3180 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3181 const gdb_byte
*info_ptr
,
3182 struct die_info
*comp_unit_die
,
3186 struct dwarf2_cu
*cu
= reader
->cu
;
3187 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3188 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3189 struct dwarf2_per_cu_data
*lh_cu
;
3190 struct line_header
*lh
;
3191 struct attribute
*attr
;
3193 const char *name
, *comp_dir
;
3195 struct quick_file_names
*qfn
;
3196 unsigned int line_offset
;
3198 gdb_assert (! this_cu
->is_debug_types
);
3200 /* Our callers never want to match partial units -- instead they
3201 will match the enclosing full CU. */
3202 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3204 this_cu
->v
.quick
->no_file_data
= 1;
3213 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3216 struct quick_file_names find_entry
;
3218 line_offset
= DW_UNSND (attr
);
3220 /* We may have already read in this line header (TU line header sharing).
3221 If we have we're done. */
3222 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3223 find_entry
.hash
.line_offset
.sect_off
= line_offset
;
3224 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
3225 &find_entry
, INSERT
);
3228 lh_cu
->v
.quick
->file_names
= *slot
;
3232 lh
= dwarf_decode_line_header (line_offset
, cu
);
3236 lh_cu
->v
.quick
->no_file_data
= 1;
3240 qfn
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*qfn
));
3241 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3242 qfn
->hash
.line_offset
.sect_off
= line_offset
;
3243 gdb_assert (slot
!= NULL
);
3246 find_file_and_directory (comp_unit_die
, cu
, &name
, &comp_dir
);
3248 qfn
->num_file_names
= lh
->num_file_names
;
3249 qfn
->file_names
= obstack_alloc (&objfile
->objfile_obstack
,
3250 lh
->num_file_names
* sizeof (char *));
3251 for (i
= 0; i
< lh
->num_file_names
; ++i
)
3252 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
, comp_dir
);
3253 qfn
->real_names
= NULL
;
3255 free_line_header (lh
);
3257 lh_cu
->v
.quick
->file_names
= qfn
;
3260 /* A helper for the "quick" functions which attempts to read the line
3261 table for THIS_CU. */
3263 static struct quick_file_names
*
3264 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3266 /* This should never be called for TUs. */
3267 gdb_assert (! this_cu
->is_debug_types
);
3268 /* Nor type unit groups. */
3269 gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu
));
3271 if (this_cu
->v
.quick
->file_names
!= NULL
)
3272 return this_cu
->v
.quick
->file_names
;
3273 /* If we know there is no line data, no point in looking again. */
3274 if (this_cu
->v
.quick
->no_file_data
)
3277 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
3279 if (this_cu
->v
.quick
->no_file_data
)
3281 return this_cu
->v
.quick
->file_names
;
3284 /* A helper for the "quick" functions which computes and caches the
3285 real path for a given file name from the line table. */
3288 dw2_get_real_path (struct objfile
*objfile
,
3289 struct quick_file_names
*qfn
, int index
)
3291 if (qfn
->real_names
== NULL
)
3292 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
3293 qfn
->num_file_names
, char *);
3295 if (qfn
->real_names
[index
] == NULL
)
3296 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]);
3298 return qfn
->real_names
[index
];
3301 static struct symtab
*
3302 dw2_find_last_source_symtab (struct objfile
*objfile
)
3306 dw2_setup (objfile
);
3307 index
= dwarf2_per_objfile
->n_comp_units
- 1;
3308 return dw2_instantiate_symtab (dw2_get_cutu (index
));
3311 /* Traversal function for dw2_forget_cached_source_info. */
3314 dw2_free_cached_file_names (void **slot
, void *info
)
3316 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3318 if (file_data
->real_names
)
3322 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3324 xfree ((void*) file_data
->real_names
[i
]);
3325 file_data
->real_names
[i
] = NULL
;
3333 dw2_forget_cached_source_info (struct objfile
*objfile
)
3335 dw2_setup (objfile
);
3337 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
3338 dw2_free_cached_file_names
, NULL
);
3341 /* Helper function for dw2_map_symtabs_matching_filename that expands
3342 the symtabs and calls the iterator. */
3345 dw2_map_expand_apply (struct objfile
*objfile
,
3346 struct dwarf2_per_cu_data
*per_cu
,
3347 const char *name
, const char *real_path
,
3348 int (*callback
) (struct symtab
*, void *),
3351 struct symtab
*last_made
= objfile
->symtabs
;
3353 /* Don't visit already-expanded CUs. */
3354 if (per_cu
->v
.quick
->symtab
)
3357 /* This may expand more than one symtab, and we want to iterate over
3359 dw2_instantiate_symtab (per_cu
);
3361 return iterate_over_some_symtabs (name
, real_path
, callback
, data
,
3362 objfile
->symtabs
, last_made
);
3365 /* Implementation of the map_symtabs_matching_filename method. */
3368 dw2_map_symtabs_matching_filename (struct objfile
*objfile
, const char *name
,
3369 const char *real_path
,
3370 int (*callback
) (struct symtab
*, void *),
3374 const char *name_basename
= lbasename (name
);
3376 dw2_setup (objfile
);
3378 /* The rule is CUs specify all the files, including those used by
3379 any TU, so there's no need to scan TUs here. */
3381 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3384 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3385 struct quick_file_names
*file_data
;
3387 /* We only need to look at symtabs not already expanded. */
3388 if (per_cu
->v
.quick
->symtab
)
3391 file_data
= dw2_get_file_names (per_cu
);
3392 if (file_data
== NULL
)
3395 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3397 const char *this_name
= file_data
->file_names
[j
];
3398 const char *this_real_name
;
3400 if (compare_filenames_for_search (this_name
, name
))
3402 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3408 /* Before we invoke realpath, which can get expensive when many
3409 files are involved, do a quick comparison of the basenames. */
3410 if (! basenames_may_differ
3411 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3414 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3415 if (compare_filenames_for_search (this_real_name
, name
))
3417 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3423 if (real_path
!= NULL
)
3425 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3426 gdb_assert (IS_ABSOLUTE_PATH (name
));
3427 if (this_real_name
!= NULL
3428 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3430 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3442 /* Struct used to manage iterating over all CUs looking for a symbol. */
3444 struct dw2_symtab_iterator
3446 /* The internalized form of .gdb_index. */
3447 struct mapped_index
*index
;
3448 /* If non-zero, only look for symbols that match BLOCK_INDEX. */
3449 int want_specific_block
;
3450 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
3451 Unused if !WANT_SPECIFIC_BLOCK. */
3453 /* The kind of symbol we're looking for. */
3455 /* The list of CUs from the index entry of the symbol,
3456 or NULL if not found. */
3458 /* The next element in VEC to look at. */
3460 /* The number of elements in VEC, or zero if there is no match. */
3462 /* Have we seen a global version of the symbol?
3463 If so we can ignore all further global instances.
3464 This is to work around gold/15646, inefficient gold-generated
3469 /* Initialize the index symtab iterator ITER.
3470 If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols
3471 in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
3474 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3475 struct mapped_index
*index
,
3476 int want_specific_block
,
3481 iter
->index
= index
;
3482 iter
->want_specific_block
= want_specific_block
;
3483 iter
->block_index
= block_index
;
3484 iter
->domain
= domain
;
3486 iter
->global_seen
= 0;
3488 if (find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3489 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3497 /* Return the next matching CU or NULL if there are no more. */
3499 static struct dwarf2_per_cu_data
*
3500 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3502 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3504 offset_type cu_index_and_attrs
=
3505 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3506 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3507 struct dwarf2_per_cu_data
*per_cu
;
3508 int want_static
= iter
->block_index
!= GLOBAL_BLOCK
;
3509 /* This value is only valid for index versions >= 7. */
3510 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3511 gdb_index_symbol_kind symbol_kind
=
3512 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3513 /* Only check the symbol attributes if they're present.
3514 Indices prior to version 7 don't record them,
3515 and indices >= 7 may elide them for certain symbols
3516 (gold does this). */
3518 (iter
->index
->version
>= 7
3519 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3521 /* Don't crash on bad data. */
3522 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
3523 + dwarf2_per_objfile
->n_type_units
))
3525 complaint (&symfile_complaints
,
3526 _(".gdb_index entry has bad CU index"
3528 objfile_name (dwarf2_per_objfile
->objfile
));
3532 per_cu
= dw2_get_cutu (cu_index
);
3534 /* Skip if already read in. */
3535 if (per_cu
->v
.quick
->symtab
)
3538 /* Check static vs global. */
3541 if (iter
->want_specific_block
3542 && want_static
!= is_static
)
3544 /* Work around gold/15646. */
3545 if (!is_static
&& iter
->global_seen
)
3548 iter
->global_seen
= 1;
3551 /* Only check the symbol's kind if it has one. */
3554 switch (iter
->domain
)
3557 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3558 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3559 /* Some types are also in VAR_DOMAIN. */
3560 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3564 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3568 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3583 static struct symtab
*
3584 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
3585 const char *name
, domain_enum domain
)
3587 struct symtab
*stab_best
= NULL
;
3588 struct mapped_index
*index
;
3590 dw2_setup (objfile
);
3592 index
= dwarf2_per_objfile
->index_table
;
3594 /* index is NULL if OBJF_READNOW. */
3597 struct dw2_symtab_iterator iter
;
3598 struct dwarf2_per_cu_data
*per_cu
;
3600 dw2_symtab_iter_init (&iter
, index
, 1, block_index
, domain
, name
);
3602 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3604 struct symbol
*sym
= NULL
;
3605 struct symtab
*stab
= dw2_instantiate_symtab (per_cu
);
3607 /* Some caution must be observed with overloaded functions
3608 and methods, since the index will not contain any overload
3609 information (but NAME might contain it). */
3612 struct blockvector
*bv
= BLOCKVECTOR (stab
);
3613 struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
3615 sym
= lookup_block_symbol (block
, name
, domain
);
3618 if (sym
&& strcmp_iw (SYMBOL_SEARCH_NAME (sym
), name
) == 0)
3620 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
3626 /* Keep looking through other CUs. */
3634 dw2_print_stats (struct objfile
*objfile
)
3636 int i
, total
, count
;
3638 dw2_setup (objfile
);
3639 total
= dwarf2_per_objfile
->n_comp_units
+ dwarf2_per_objfile
->n_type_units
;
3641 for (i
= 0; i
< total
; ++i
)
3643 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3645 if (!per_cu
->v
.quick
->symtab
)
3648 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
3649 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3652 /* This dumps minimal information about the index.
3653 It is called via "mt print objfiles".
3654 One use is to verify .gdb_index has been loaded by the
3655 gdb.dwarf2/gdb-index.exp testcase. */
3658 dw2_dump (struct objfile
*objfile
)
3660 dw2_setup (objfile
);
3661 gdb_assert (dwarf2_per_objfile
->using_index
);
3662 printf_filtered (".gdb_index:");
3663 if (dwarf2_per_objfile
->index_table
!= NULL
)
3665 printf_filtered (" version %d\n",
3666 dwarf2_per_objfile
->index_table
->version
);
3669 printf_filtered (" faked for \"readnow\"\n");
3670 printf_filtered ("\n");
3674 dw2_relocate (struct objfile
*objfile
,
3675 const struct section_offsets
*new_offsets
,
3676 const struct section_offsets
*delta
)
3678 /* There's nothing to relocate here. */
3682 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
3683 const char *func_name
)
3685 struct mapped_index
*index
;
3687 dw2_setup (objfile
);
3689 index
= dwarf2_per_objfile
->index_table
;
3691 /* index is NULL if OBJF_READNOW. */
3694 struct dw2_symtab_iterator iter
;
3695 struct dwarf2_per_cu_data
*per_cu
;
3697 /* Note: It doesn't matter what we pass for block_index here. */
3698 dw2_symtab_iter_init (&iter
, index
, 0, GLOBAL_BLOCK
, VAR_DOMAIN
,
3701 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3702 dw2_instantiate_symtab (per_cu
);
3707 dw2_expand_all_symtabs (struct objfile
*objfile
)
3711 dw2_setup (objfile
);
3713 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3714 + dwarf2_per_objfile
->n_type_units
); ++i
)
3716 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3718 dw2_instantiate_symtab (per_cu
);
3723 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
3724 const char *fullname
)
3728 dw2_setup (objfile
);
3730 /* We don't need to consider type units here.
3731 This is only called for examining code, e.g. expand_line_sal.
3732 There can be an order of magnitude (or more) more type units
3733 than comp units, and we avoid them if we can. */
3735 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3738 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3739 struct quick_file_names
*file_data
;
3741 /* We only need to look at symtabs not already expanded. */
3742 if (per_cu
->v
.quick
->symtab
)
3745 file_data
= dw2_get_file_names (per_cu
);
3746 if (file_data
== NULL
)
3749 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3751 const char *this_fullname
= file_data
->file_names
[j
];
3753 if (filename_cmp (this_fullname
, fullname
) == 0)
3755 dw2_instantiate_symtab (per_cu
);
3763 dw2_map_matching_symbols (struct objfile
*objfile
,
3764 const char * name
, domain_enum
namespace,
3766 int (*callback
) (struct block
*,
3767 struct symbol
*, void *),
3768 void *data
, symbol_compare_ftype
*match
,
3769 symbol_compare_ftype
*ordered_compare
)
3771 /* Currently unimplemented; used for Ada. The function can be called if the
3772 current language is Ada for a non-Ada objfile using GNU index. As Ada
3773 does not look for non-Ada symbols this function should just return. */
3777 dw2_expand_symtabs_matching
3778 (struct objfile
*objfile
,
3779 expand_symtabs_file_matcher_ftype
*file_matcher
,
3780 expand_symtabs_symbol_matcher_ftype
*symbol_matcher
,
3781 enum search_domain kind
,
3786 struct mapped_index
*index
;
3788 dw2_setup (objfile
);
3790 /* index_table is NULL if OBJF_READNOW. */
3791 if (!dwarf2_per_objfile
->index_table
)
3793 index
= dwarf2_per_objfile
->index_table
;
3795 if (file_matcher
!= NULL
)
3797 struct cleanup
*cleanup
;
3798 htab_t visited_found
, visited_not_found
;
3800 visited_found
= htab_create_alloc (10,
3801 htab_hash_pointer
, htab_eq_pointer
,
3802 NULL
, xcalloc
, xfree
);
3803 cleanup
= make_cleanup_htab_delete (visited_found
);
3804 visited_not_found
= htab_create_alloc (10,
3805 htab_hash_pointer
, htab_eq_pointer
,
3806 NULL
, xcalloc
, xfree
);
3807 make_cleanup_htab_delete (visited_not_found
);
3809 /* The rule is CUs specify all the files, including those used by
3810 any TU, so there's no need to scan TUs here. */
3812 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3815 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3816 struct quick_file_names
*file_data
;
3819 per_cu
->v
.quick
->mark
= 0;
3821 /* We only need to look at symtabs not already expanded. */
3822 if (per_cu
->v
.quick
->symtab
)
3825 file_data
= dw2_get_file_names (per_cu
);
3826 if (file_data
== NULL
)
3829 if (htab_find (visited_not_found
, file_data
) != NULL
)
3831 else if (htab_find (visited_found
, file_data
) != NULL
)
3833 per_cu
->v
.quick
->mark
= 1;
3837 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3839 const char *this_real_name
;
3841 if (file_matcher (file_data
->file_names
[j
], data
, 0))
3843 per_cu
->v
.quick
->mark
= 1;
3847 /* Before we invoke realpath, which can get expensive when many
3848 files are involved, do a quick comparison of the basenames. */
3849 if (!basenames_may_differ
3850 && !file_matcher (lbasename (file_data
->file_names
[j
]),
3854 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3855 if (file_matcher (this_real_name
, data
, 0))
3857 per_cu
->v
.quick
->mark
= 1;
3862 slot
= htab_find_slot (per_cu
->v
.quick
->mark
3864 : visited_not_found
,
3869 do_cleanups (cleanup
);
3872 for (iter
= 0; iter
< index
->symbol_table_slots
; ++iter
)
3874 offset_type idx
= 2 * iter
;
3876 offset_type
*vec
, vec_len
, vec_idx
;
3877 int global_seen
= 0;
3879 if (index
->symbol_table
[idx
] == 0 && index
->symbol_table
[idx
+ 1] == 0)
3882 name
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[idx
]);
3884 if (! (*symbol_matcher
) (name
, data
))
3887 /* The name was matched, now expand corresponding CUs that were
3889 vec
= (offset_type
*) (index
->constant_pool
3890 + MAYBE_SWAP (index
->symbol_table
[idx
+ 1]));
3891 vec_len
= MAYBE_SWAP (vec
[0]);
3892 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
3894 struct dwarf2_per_cu_data
*per_cu
;
3895 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
3896 /* This value is only valid for index versions >= 7. */
3897 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3898 gdb_index_symbol_kind symbol_kind
=
3899 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3900 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3901 /* Only check the symbol attributes if they're present.
3902 Indices prior to version 7 don't record them,
3903 and indices >= 7 may elide them for certain symbols
3904 (gold does this). */
3906 (index
->version
>= 7
3907 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3909 /* Work around gold/15646. */
3912 if (!is_static
&& global_seen
)
3918 /* Only check the symbol's kind if it has one. */
3923 case VARIABLES_DOMAIN
:
3924 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
3927 case FUNCTIONS_DOMAIN
:
3928 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
3932 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3940 /* Don't crash on bad data. */
3941 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
3942 + dwarf2_per_objfile
->n_type_units
))
3944 complaint (&symfile_complaints
,
3945 _(".gdb_index entry has bad CU index"
3946 " [in module %s]"), objfile_name (objfile
));
3950 per_cu
= dw2_get_cutu (cu_index
);
3951 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
3952 dw2_instantiate_symtab (per_cu
);
3957 /* A helper for dw2_find_pc_sect_symtab which finds the most specific
3960 static struct symtab
*
3961 recursively_find_pc_sect_symtab (struct symtab
*symtab
, CORE_ADDR pc
)
3965 if (BLOCKVECTOR (symtab
) != NULL
3966 && blockvector_contains_pc (BLOCKVECTOR (symtab
), pc
))
3969 if (symtab
->includes
== NULL
)
3972 for (i
= 0; symtab
->includes
[i
]; ++i
)
3974 struct symtab
*s
= symtab
->includes
[i
];
3976 s
= recursively_find_pc_sect_symtab (s
, pc
);
3984 static struct symtab
*
3985 dw2_find_pc_sect_symtab (struct objfile
*objfile
,
3986 struct bound_minimal_symbol msymbol
,
3988 struct obj_section
*section
,
3991 struct dwarf2_per_cu_data
*data
;
3992 struct symtab
*result
;
3994 dw2_setup (objfile
);
3996 if (!objfile
->psymtabs_addrmap
)
3999 data
= addrmap_find (objfile
->psymtabs_addrmap
, pc
);
4003 if (warn_if_readin
&& data
->v
.quick
->symtab
)
4004 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
4005 paddress (get_objfile_arch (objfile
), pc
));
4007 result
= recursively_find_pc_sect_symtab (dw2_instantiate_symtab (data
), pc
);
4008 gdb_assert (result
!= NULL
);
4013 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
4014 void *data
, int need_fullname
)
4017 struct cleanup
*cleanup
;
4018 htab_t visited
= htab_create_alloc (10, htab_hash_pointer
, htab_eq_pointer
,
4019 NULL
, xcalloc
, xfree
);
4021 cleanup
= make_cleanup_htab_delete (visited
);
4022 dw2_setup (objfile
);
4024 /* The rule is CUs specify all the files, including those used by
4025 any TU, so there's no need to scan TUs here.
4026 We can ignore file names coming from already-expanded CUs. */
4028 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4030 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4032 if (per_cu
->v
.quick
->symtab
)
4034 void **slot
= htab_find_slot (visited
, per_cu
->v
.quick
->file_names
,
4037 *slot
= per_cu
->v
.quick
->file_names
;
4041 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4044 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
4045 struct quick_file_names
*file_data
;
4048 /* We only need to look at symtabs not already expanded. */
4049 if (per_cu
->v
.quick
->symtab
)
4052 file_data
= dw2_get_file_names (per_cu
);
4053 if (file_data
== NULL
)
4056 slot
= htab_find_slot (visited
, file_data
, INSERT
);
4059 /* Already visited. */
4064 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
4066 const char *this_real_name
;
4069 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
4071 this_real_name
= NULL
;
4072 (*fun
) (file_data
->file_names
[j
], this_real_name
, data
);
4076 do_cleanups (cleanup
);
4080 dw2_has_symbols (struct objfile
*objfile
)
4085 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
4088 dw2_find_last_source_symtab
,
4089 dw2_forget_cached_source_info
,
4090 dw2_map_symtabs_matching_filename
,
4095 dw2_expand_symtabs_for_function
,
4096 dw2_expand_all_symtabs
,
4097 dw2_expand_symtabs_with_fullname
,
4098 dw2_map_matching_symbols
,
4099 dw2_expand_symtabs_matching
,
4100 dw2_find_pc_sect_symtab
,
4101 dw2_map_symbol_filenames
4104 /* Initialize for reading DWARF for this objfile. Return 0 if this
4105 file will use psymtabs, or 1 if using the GNU index. */
4108 dwarf2_initialize_objfile (struct objfile
*objfile
)
4110 /* If we're about to read full symbols, don't bother with the
4111 indices. In this case we also don't care if some other debug
4112 format is making psymtabs, because they are all about to be
4114 if ((objfile
->flags
& OBJF_READNOW
))
4118 dwarf2_per_objfile
->using_index
= 1;
4119 create_all_comp_units (objfile
);
4120 create_all_type_units (objfile
);
4121 dwarf2_per_objfile
->quick_file_names_table
=
4122 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
4124 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
4125 + dwarf2_per_objfile
->n_type_units
); ++i
)
4127 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4129 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4130 struct dwarf2_per_cu_quick_data
);
4133 /* Return 1 so that gdb sees the "quick" functions. However,
4134 these functions will be no-ops because we will have expanded
4139 if (dwarf2_read_index (objfile
))
4147 /* Build a partial symbol table. */
4150 dwarf2_build_psymtabs (struct objfile
*objfile
)
4152 volatile struct gdb_exception except
;
4154 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
4156 init_psymbol_list (objfile
, 1024);
4159 TRY_CATCH (except
, RETURN_MASK_ERROR
)
4161 /* This isn't really ideal: all the data we allocate on the
4162 objfile's obstack is still uselessly kept around. However,
4163 freeing it seems unsafe. */
4164 struct cleanup
*cleanups
= make_cleanup_discard_psymtabs (objfile
);
4166 dwarf2_build_psymtabs_hard (objfile
);
4167 discard_cleanups (cleanups
);
4169 if (except
.reason
< 0)
4170 exception_print (gdb_stderr
, except
);
4173 /* Return the total length of the CU described by HEADER. */
4176 get_cu_length (const struct comp_unit_head
*header
)
4178 return header
->initial_length_size
+ header
->length
;
4181 /* Return TRUE if OFFSET is within CU_HEADER. */
4184 offset_in_cu_p (const struct comp_unit_head
*cu_header
, sect_offset offset
)
4186 sect_offset bottom
= { cu_header
->offset
.sect_off
};
4187 sect_offset top
= { cu_header
->offset
.sect_off
+ get_cu_length (cu_header
) };
4189 return (offset
.sect_off
>= bottom
.sect_off
&& offset
.sect_off
< top
.sect_off
);
4192 /* Find the base address of the compilation unit for range lists and
4193 location lists. It will normally be specified by DW_AT_low_pc.
4194 In DWARF-3 draft 4, the base address could be overridden by
4195 DW_AT_entry_pc. It's been removed, but GCC still uses this for
4196 compilation units with discontinuous ranges. */
4199 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
4201 struct attribute
*attr
;
4204 cu
->base_address
= 0;
4206 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
4209 cu
->base_address
= attr_value_as_address (attr
);
4214 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4217 cu
->base_address
= attr_value_as_address (attr
);
4223 /* Read in the comp unit header information from the debug_info at info_ptr.
4224 NOTE: This leaves members offset, first_die_offset to be filled in
4227 static const gdb_byte
*
4228 read_comp_unit_head (struct comp_unit_head
*cu_header
,
4229 const gdb_byte
*info_ptr
, bfd
*abfd
)
4232 unsigned int bytes_read
;
4234 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
4235 cu_header
->initial_length_size
= bytes_read
;
4236 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
4237 info_ptr
+= bytes_read
;
4238 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
4240 cu_header
->abbrev_offset
.sect_off
= read_offset (abfd
, info_ptr
, cu_header
,
4242 info_ptr
+= bytes_read
;
4243 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
4245 signed_addr
= bfd_get_sign_extend_vma (abfd
);
4246 if (signed_addr
< 0)
4247 internal_error (__FILE__
, __LINE__
,
4248 _("read_comp_unit_head: dwarf from non elf file"));
4249 cu_header
->signed_addr_p
= signed_addr
;
4254 /* Helper function that returns the proper abbrev section for
4257 static struct dwarf2_section_info
*
4258 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
4260 struct dwarf2_section_info
*abbrev
;
4262 if (this_cu
->is_dwz
)
4263 abbrev
= &dwarf2_get_dwz_file ()->abbrev
;
4265 abbrev
= &dwarf2_per_objfile
->abbrev
;
4270 /* Subroutine of read_and_check_comp_unit_head and
4271 read_and_check_type_unit_head to simplify them.
4272 Perform various error checking on the header. */
4275 error_check_comp_unit_head (struct comp_unit_head
*header
,
4276 struct dwarf2_section_info
*section
,
4277 struct dwarf2_section_info
*abbrev_section
)
4279 bfd
*abfd
= get_section_bfd_owner (section
);
4280 const char *filename
= get_section_file_name (section
);
4282 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
4283 error (_("Dwarf Error: wrong version in compilation unit header "
4284 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
4287 if (header
->abbrev_offset
.sect_off
4288 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
4289 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
4290 "(offset 0x%lx + 6) [in module %s]"),
4291 (long) header
->abbrev_offset
.sect_off
, (long) header
->offset
.sect_off
,
4294 /* Cast to unsigned long to use 64-bit arithmetic when possible to
4295 avoid potential 32-bit overflow. */
4296 if (((unsigned long) header
->offset
.sect_off
+ get_cu_length (header
))
4298 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
4299 "(offset 0x%lx + 0) [in module %s]"),
4300 (long) header
->length
, (long) header
->offset
.sect_off
,
4304 /* Read in a CU/TU header and perform some basic error checking.
4305 The contents of the header are stored in HEADER.
4306 The result is a pointer to the start of the first DIE. */
4308 static const gdb_byte
*
4309 read_and_check_comp_unit_head (struct comp_unit_head
*header
,
4310 struct dwarf2_section_info
*section
,
4311 struct dwarf2_section_info
*abbrev_section
,
4312 const gdb_byte
*info_ptr
,
4313 int is_debug_types_section
)
4315 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
4316 bfd
*abfd
= get_section_bfd_owner (section
);
4318 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4320 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
4322 /* If we're reading a type unit, skip over the signature and
4323 type_offset fields. */
4324 if (is_debug_types_section
)
4325 info_ptr
+= 8 /*signature*/ + header
->offset_size
;
4327 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4329 error_check_comp_unit_head (header
, section
, abbrev_section
);
4334 /* Read in the types comp unit header information from .debug_types entry at
4335 types_ptr. The result is a pointer to one past the end of the header. */
4337 static const gdb_byte
*
4338 read_and_check_type_unit_head (struct comp_unit_head
*header
,
4339 struct dwarf2_section_info
*section
,
4340 struct dwarf2_section_info
*abbrev_section
,
4341 const gdb_byte
*info_ptr
,
4342 ULONGEST
*signature
,
4343 cu_offset
*type_offset_in_tu
)
4345 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
4346 bfd
*abfd
= get_section_bfd_owner (section
);
4348 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4350 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
4352 /* If we're reading a type unit, skip over the signature and
4353 type_offset fields. */
4354 if (signature
!= NULL
)
4355 *signature
= read_8_bytes (abfd
, info_ptr
);
4357 if (type_offset_in_tu
!= NULL
)
4358 type_offset_in_tu
->cu_off
= read_offset_1 (abfd
, info_ptr
,
4359 header
->offset_size
);
4360 info_ptr
+= header
->offset_size
;
4362 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4364 error_check_comp_unit_head (header
, section
, abbrev_section
);
4369 /* Fetch the abbreviation table offset from a comp or type unit header. */
4372 read_abbrev_offset (struct dwarf2_section_info
*section
,
4375 bfd
*abfd
= get_section_bfd_owner (section
);
4376 const gdb_byte
*info_ptr
;
4377 unsigned int length
, initial_length_size
, offset_size
;
4378 sect_offset abbrev_offset
;
4380 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
4381 info_ptr
= section
->buffer
+ offset
.sect_off
;
4382 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
4383 offset_size
= initial_length_size
== 4 ? 4 : 8;
4384 info_ptr
+= initial_length_size
+ 2 /*version*/;
4385 abbrev_offset
.sect_off
= read_offset_1 (abfd
, info_ptr
, offset_size
);
4386 return abbrev_offset
;
4389 /* Allocate a new partial symtab for file named NAME and mark this new
4390 partial symtab as being an include of PST. */
4393 dwarf2_create_include_psymtab (const char *name
, struct partial_symtab
*pst
,
4394 struct objfile
*objfile
)
4396 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
4398 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
4400 /* It shares objfile->objfile_obstack. */
4401 subpst
->dirname
= pst
->dirname
;
4404 subpst
->section_offsets
= pst
->section_offsets
;
4405 subpst
->textlow
= 0;
4406 subpst
->texthigh
= 0;
4408 subpst
->dependencies
= (struct partial_symtab
**)
4409 obstack_alloc (&objfile
->objfile_obstack
,
4410 sizeof (struct partial_symtab
*));
4411 subpst
->dependencies
[0] = pst
;
4412 subpst
->number_of_dependencies
= 1;
4414 subpst
->globals_offset
= 0;
4415 subpst
->n_global_syms
= 0;
4416 subpst
->statics_offset
= 0;
4417 subpst
->n_static_syms
= 0;
4418 subpst
->symtab
= NULL
;
4419 subpst
->read_symtab
= pst
->read_symtab
;
4422 /* No private part is necessary for include psymtabs. This property
4423 can be used to differentiate between such include psymtabs and
4424 the regular ones. */
4425 subpst
->read_symtab_private
= NULL
;
4428 /* Read the Line Number Program data and extract the list of files
4429 included by the source file represented by PST. Build an include
4430 partial symtab for each of these included files. */
4433 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
4434 struct die_info
*die
,
4435 struct partial_symtab
*pst
)
4437 struct line_header
*lh
= NULL
;
4438 struct attribute
*attr
;
4440 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
4442 lh
= dwarf_decode_line_header (DW_UNSND (attr
), cu
);
4444 return; /* No linetable, so no includes. */
4446 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
4447 dwarf_decode_lines (lh
, pst
->dirname
, cu
, pst
, 1);
4449 free_line_header (lh
);
4453 hash_signatured_type (const void *item
)
4455 const struct signatured_type
*sig_type
= item
;
4457 /* This drops the top 32 bits of the signature, but is ok for a hash. */
4458 return sig_type
->signature
;
4462 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
4464 const struct signatured_type
*lhs
= item_lhs
;
4465 const struct signatured_type
*rhs
= item_rhs
;
4467 return lhs
->signature
== rhs
->signature
;
4470 /* Allocate a hash table for signatured types. */
4473 allocate_signatured_type_table (struct objfile
*objfile
)
4475 return htab_create_alloc_ex (41,
4476 hash_signatured_type
,
4479 &objfile
->objfile_obstack
,
4480 hashtab_obstack_allocate
,
4481 dummy_obstack_deallocate
);
4484 /* A helper function to add a signatured type CU to a table. */
4487 add_signatured_type_cu_to_table (void **slot
, void *datum
)
4489 struct signatured_type
*sigt
= *slot
;
4490 struct signatured_type
***datap
= datum
;
4498 /* Create the hash table of all entries in the .debug_types
4499 (or .debug_types.dwo) section(s).
4500 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
4501 otherwise it is NULL.
4503 The result is a pointer to the hash table or NULL if there are no types.
4505 Note: This function processes DWO files only, not DWP files. */
4508 create_debug_types_hash_table (struct dwo_file
*dwo_file
,
4509 VEC (dwarf2_section_info_def
) *types
)
4511 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4512 htab_t types_htab
= NULL
;
4514 struct dwarf2_section_info
*section
;
4515 struct dwarf2_section_info
*abbrev_section
;
4517 if (VEC_empty (dwarf2_section_info_def
, types
))
4520 abbrev_section
= (dwo_file
!= NULL
4521 ? &dwo_file
->sections
.abbrev
4522 : &dwarf2_per_objfile
->abbrev
);
4524 if (dwarf2_read_debug
)
4525 fprintf_unfiltered (gdb_stdlog
, "Reading .debug_types%s for %s:\n",
4526 dwo_file
? ".dwo" : "",
4527 get_section_file_name (abbrev_section
));
4530 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
4534 const gdb_byte
*info_ptr
, *end_ptr
;
4536 dwarf2_read_section (objfile
, section
);
4537 info_ptr
= section
->buffer
;
4539 if (info_ptr
== NULL
)
4542 /* We can't set abfd until now because the section may be empty or
4543 not present, in which case the bfd is unknown. */
4544 abfd
= get_section_bfd_owner (section
);
4546 /* We don't use init_cutu_and_read_dies_simple, or some such, here
4547 because we don't need to read any dies: the signature is in the
4550 end_ptr
= info_ptr
+ section
->size
;
4551 while (info_ptr
< end_ptr
)
4554 cu_offset type_offset_in_tu
;
4556 struct signatured_type
*sig_type
;
4557 struct dwo_unit
*dwo_tu
;
4559 const gdb_byte
*ptr
= info_ptr
;
4560 struct comp_unit_head header
;
4561 unsigned int length
;
4563 offset
.sect_off
= ptr
- section
->buffer
;
4565 /* We need to read the type's signature in order to build the hash
4566 table, but we don't need anything else just yet. */
4568 ptr
= read_and_check_type_unit_head (&header
, section
,
4569 abbrev_section
, ptr
,
4570 &signature
, &type_offset_in_tu
);
4572 length
= get_cu_length (&header
);
4574 /* Skip dummy type units. */
4575 if (ptr
>= info_ptr
+ length
4576 || peek_abbrev_code (abfd
, ptr
) == 0)
4582 if (types_htab
== NULL
)
4585 types_htab
= allocate_dwo_unit_table (objfile
);
4587 types_htab
= allocate_signatured_type_table (objfile
);
4593 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4595 dwo_tu
->dwo_file
= dwo_file
;
4596 dwo_tu
->signature
= signature
;
4597 dwo_tu
->type_offset_in_tu
= type_offset_in_tu
;
4598 dwo_tu
->section
= section
;
4599 dwo_tu
->offset
= offset
;
4600 dwo_tu
->length
= length
;
4604 /* N.B.: type_offset is not usable if this type uses a DWO file.
4605 The real type_offset is in the DWO file. */
4607 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4608 struct signatured_type
);
4609 sig_type
->signature
= signature
;
4610 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
4611 sig_type
->per_cu
.objfile
= objfile
;
4612 sig_type
->per_cu
.is_debug_types
= 1;
4613 sig_type
->per_cu
.section
= section
;
4614 sig_type
->per_cu
.offset
= offset
;
4615 sig_type
->per_cu
.length
= length
;
4618 slot
= htab_find_slot (types_htab
,
4619 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
4621 gdb_assert (slot
!= NULL
);
4624 sect_offset dup_offset
;
4628 const struct dwo_unit
*dup_tu
= *slot
;
4630 dup_offset
= dup_tu
->offset
;
4634 const struct signatured_type
*dup_tu
= *slot
;
4636 dup_offset
= dup_tu
->per_cu
.offset
;
4639 complaint (&symfile_complaints
,
4640 _("debug type entry at offset 0x%x is duplicate to"
4641 " the entry at offset 0x%x, signature %s"),
4642 offset
.sect_off
, dup_offset
.sect_off
,
4643 hex_string (signature
));
4645 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
4647 if (dwarf2_read_debug
> 1)
4648 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature %s\n",
4650 hex_string (signature
));
4659 /* Create the hash table of all entries in the .debug_types section,
4660 and initialize all_type_units.
4661 The result is zero if there is an error (e.g. missing .debug_types section),
4662 otherwise non-zero. */
4665 create_all_type_units (struct objfile
*objfile
)
4668 struct signatured_type
**iter
;
4670 types_htab
= create_debug_types_hash_table (NULL
, dwarf2_per_objfile
->types
);
4671 if (types_htab
== NULL
)
4673 dwarf2_per_objfile
->signatured_types
= NULL
;
4677 dwarf2_per_objfile
->signatured_types
= types_htab
;
4679 dwarf2_per_objfile
->n_type_units
= htab_elements (types_htab
);
4680 dwarf2_per_objfile
->all_type_units
4681 = xmalloc (dwarf2_per_objfile
->n_type_units
4682 * sizeof (struct signatured_type
*));
4683 iter
= &dwarf2_per_objfile
->all_type_units
[0];
4684 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
4685 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
4686 == dwarf2_per_objfile
->n_type_units
);
4691 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
4692 Fill in SIG_ENTRY with DWO_ENTRY. */
4695 fill_in_sig_entry_from_dwo_entry (struct objfile
*objfile
,
4696 struct signatured_type
*sig_entry
,
4697 struct dwo_unit
*dwo_entry
)
4699 /* Make sure we're not clobbering something we don't expect to. */
4700 gdb_assert (! sig_entry
->per_cu
.queued
);
4701 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
4702 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
4703 gdb_assert (sig_entry
->per_cu
.v
.quick
->symtab
== NULL
);
4704 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
4705 gdb_assert (sig_entry
->type_offset_in_section
.sect_off
== 0);
4706 gdb_assert (sig_entry
->type_unit_group
== NULL
);
4707 gdb_assert (sig_entry
->dwo_unit
== NULL
);
4709 sig_entry
->per_cu
.section
= dwo_entry
->section
;
4710 sig_entry
->per_cu
.offset
= dwo_entry
->offset
;
4711 sig_entry
->per_cu
.length
= dwo_entry
->length
;
4712 sig_entry
->per_cu
.reading_dwo_directly
= 1;
4713 sig_entry
->per_cu
.objfile
= objfile
;
4714 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
4715 sig_entry
->dwo_unit
= dwo_entry
;
4718 /* Subroutine of lookup_signatured_type.
4719 If we haven't read the TU yet, create the signatured_type data structure
4720 for a TU to be read in directly from a DWO file, bypassing the stub.
4721 This is the "Stay in DWO Optimization": When there is no DWP file and we're
4722 using .gdb_index, then when reading a CU we want to stay in the DWO file
4723 containing that CU. Otherwise we could end up reading several other DWO
4724 files (due to comdat folding) to process the transitive closure of all the
4725 mentioned TUs, and that can be slow. The current DWO file will have every
4726 type signature that it needs.
4727 We only do this for .gdb_index because in the psymtab case we already have
4728 to read all the DWOs to build the type unit groups. */
4730 static struct signatured_type
*
4731 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4733 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4734 struct dwo_file
*dwo_file
;
4735 struct dwo_unit find_dwo_entry
, *dwo_entry
;
4736 struct signatured_type find_sig_entry
, *sig_entry
;
4738 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
4740 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
4741 dwo_unit of the TU itself. */
4742 dwo_file
= cu
->dwo_unit
->dwo_file
;
4744 /* We only ever need to read in one copy of a signatured type.
4745 Just use the global signatured_types array. If this is the first time
4746 we're reading this type, replace the recorded data from .gdb_index with
4749 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4751 find_sig_entry
.signature
= sig
;
4752 sig_entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_sig_entry
);
4753 if (sig_entry
== NULL
)
4756 /* We can get here with the TU already read, *or* in the process of being
4757 read. Don't reassign it if that's the case. Also note that if the TU is
4758 already being read, it may not have come from a DWO, the program may be
4759 a mix of Fission-compiled code and non-Fission-compiled code. */
4760 /* Have we already tried to read this TU? */
4761 if (sig_entry
->per_cu
.tu_read
)
4764 /* Ok, this is the first time we're reading this TU. */
4765 if (dwo_file
->tus
== NULL
)
4767 find_dwo_entry
.signature
= sig
;
4768 dwo_entry
= htab_find (dwo_file
->tus
, &find_dwo_entry
);
4769 if (dwo_entry
== NULL
)
4772 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
4773 sig_entry
->per_cu
.tu_read
= 1;
4777 /* Subroutine of lookup_dwp_signatured_type.
4778 Add an entry for signature SIG to dwarf2_per_objfile->signatured_types. */
4780 static struct signatured_type
*
4781 add_type_unit (ULONGEST sig
)
4783 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4784 int n_type_units
= dwarf2_per_objfile
->n_type_units
;
4785 struct signatured_type
*sig_type
;
4789 dwarf2_per_objfile
->all_type_units
=
4790 xrealloc (dwarf2_per_objfile
->all_type_units
,
4791 n_type_units
* sizeof (struct signatured_type
*));
4792 dwarf2_per_objfile
->n_type_units
= n_type_units
;
4793 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4794 struct signatured_type
);
4795 dwarf2_per_objfile
->all_type_units
[n_type_units
- 1] = sig_type
;
4796 sig_type
->signature
= sig
;
4797 sig_type
->per_cu
.is_debug_types
= 1;
4798 sig_type
->per_cu
.v
.quick
=
4799 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4800 struct dwarf2_per_cu_quick_data
);
4801 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4803 gdb_assert (*slot
== NULL
);
4805 /* The rest of sig_type must be filled in by the caller. */
4809 /* Subroutine of lookup_signatured_type.
4810 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
4811 then try the DWP file.
4812 Normally this "can't happen", but if there's a bug in signature
4813 generation and/or the DWP file is built incorrectly, it can happen.
4814 Using the type directly from the DWP file means we don't have the stub
4815 which has some useful attributes (e.g., DW_AT_comp_dir), but they're
4816 not critical. [Eventually the stub may go away for type units anyway.] */
4818 static struct signatured_type
*
4819 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4821 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4822 struct dwp_file
*dwp_file
= get_dwp_file ();
4823 struct dwo_unit
*dwo_entry
;
4824 struct signatured_type find_sig_entry
, *sig_entry
;
4826 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
4827 gdb_assert (dwp_file
!= NULL
);
4829 if (dwarf2_per_objfile
->signatured_types
!= NULL
)
4831 find_sig_entry
.signature
= sig
;
4832 sig_entry
= htab_find (dwarf2_per_objfile
->signatured_types
,
4834 if (sig_entry
!= NULL
)
4838 /* This is the "shouldn't happen" case.
4839 Try the DWP file and hope for the best. */
4840 if (dwp_file
->tus
== NULL
)
4842 dwo_entry
= lookup_dwo_unit_in_dwp (dwp_file
, NULL
,
4843 sig
, 1 /* is_debug_types */);
4844 if (dwo_entry
== NULL
)
4847 sig_entry
= add_type_unit (sig
);
4848 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
4850 /* The caller will signal a complaint if we return NULL.
4851 Here we don't return NULL but we still want to complain. */
4852 complaint (&symfile_complaints
,
4853 _("Bad type signature %s referenced by %s at 0x%x,"
4854 " coping by using copy in DWP [in module %s]"),
4856 cu
->per_cu
->is_debug_types
? "TU" : "CU",
4857 cu
->per_cu
->offset
.sect_off
,
4858 objfile_name (objfile
));
4863 /* Lookup a signature based type for DW_FORM_ref_sig8.
4864 Returns NULL if signature SIG is not present in the table.
4865 It is up to the caller to complain about this. */
4867 static struct signatured_type
*
4868 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4871 && dwarf2_per_objfile
->using_index
)
4873 /* We're in a DWO/DWP file, and we're using .gdb_index.
4874 These cases require special processing. */
4875 if (get_dwp_file () == NULL
)
4876 return lookup_dwo_signatured_type (cu
, sig
);
4878 return lookup_dwp_signatured_type (cu
, sig
);
4882 struct signatured_type find_entry
, *entry
;
4884 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4886 find_entry
.signature
= sig
;
4887 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
4892 /* Low level DIE reading support. */
4894 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
4897 init_cu_die_reader (struct die_reader_specs
*reader
,
4898 struct dwarf2_cu
*cu
,
4899 struct dwarf2_section_info
*section
,
4900 struct dwo_file
*dwo_file
)
4902 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
4903 reader
->abfd
= get_section_bfd_owner (section
);
4905 reader
->dwo_file
= dwo_file
;
4906 reader
->die_section
= section
;
4907 reader
->buffer
= section
->buffer
;
4908 reader
->buffer_end
= section
->buffer
+ section
->size
;
4909 reader
->comp_dir
= NULL
;
4912 /* Subroutine of init_cutu_and_read_dies to simplify it.
4913 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
4914 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
4917 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
4918 from it to the DIE in the DWO. If NULL we are skipping the stub.
4919 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
4920 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
4921 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
4922 STUB_COMP_DIR may be non-NULL.
4923 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
4924 are filled in with the info of the DIE from the DWO file.
4925 ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies
4926 provided an abbrev table to use.
4927 The result is non-zero if a valid (non-dummy) DIE was found. */
4930 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
4931 struct dwo_unit
*dwo_unit
,
4932 int abbrev_table_provided
,
4933 struct die_info
*stub_comp_unit_die
,
4934 const char *stub_comp_dir
,
4935 struct die_reader_specs
*result_reader
,
4936 const gdb_byte
**result_info_ptr
,
4937 struct die_info
**result_comp_unit_die
,
4938 int *result_has_children
)
4940 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4941 struct dwarf2_cu
*cu
= this_cu
->cu
;
4942 struct dwarf2_section_info
*section
;
4944 const gdb_byte
*begin_info_ptr
, *info_ptr
;
4945 ULONGEST signature
; /* Or dwo_id. */
4946 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
4947 int i
,num_extra_attrs
;
4948 struct dwarf2_section_info
*dwo_abbrev_section
;
4949 struct attribute
*attr
;
4950 struct die_info
*comp_unit_die
;
4952 /* At most one of these may be provided. */
4953 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
4955 /* These attributes aren't processed until later:
4956 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
4957 DW_AT_comp_dir is used now, to find the DWO file, but it is also
4958 referenced later. However, these attributes are found in the stub
4959 which we won't have later. In order to not impose this complication
4960 on the rest of the code, we read them here and copy them to the
4969 if (stub_comp_unit_die
!= NULL
)
4971 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
4973 if (! this_cu
->is_debug_types
)
4974 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
4975 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
4976 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
4977 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
4978 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
4980 /* There should be a DW_AT_addr_base attribute here (if needed).
4981 We need the value before we can process DW_FORM_GNU_addr_index. */
4983 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
4985 cu
->addr_base
= DW_UNSND (attr
);
4987 /* There should be a DW_AT_ranges_base attribute here (if needed).
4988 We need the value before we can process DW_AT_ranges. */
4989 cu
->ranges_base
= 0;
4990 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
4992 cu
->ranges_base
= DW_UNSND (attr
);
4994 else if (stub_comp_dir
!= NULL
)
4996 /* Reconstruct the comp_dir attribute to simplify the code below. */
4997 comp_dir
= (struct attribute
*)
4998 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (*comp_dir
));
4999 comp_dir
->name
= DW_AT_comp_dir
;
5000 comp_dir
->form
= DW_FORM_string
;
5001 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
5002 DW_STRING (comp_dir
) = stub_comp_dir
;
5005 /* Set up for reading the DWO CU/TU. */
5006 cu
->dwo_unit
= dwo_unit
;
5007 section
= dwo_unit
->section
;
5008 dwarf2_read_section (objfile
, section
);
5009 abfd
= get_section_bfd_owner (section
);
5010 begin_info_ptr
= info_ptr
= section
->buffer
+ dwo_unit
->offset
.sect_off
;
5011 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
5012 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
);
5014 if (this_cu
->is_debug_types
)
5016 ULONGEST header_signature
;
5017 cu_offset type_offset_in_tu
;
5018 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
5020 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
5024 &type_offset_in_tu
);
5025 /* This is not an assert because it can be caused by bad debug info. */
5026 if (sig_type
->signature
!= header_signature
)
5028 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
5029 " TU at offset 0x%x [in module %s]"),
5030 hex_string (sig_type
->signature
),
5031 hex_string (header_signature
),
5032 dwo_unit
->offset
.sect_off
,
5033 bfd_get_filename (abfd
));
5035 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5036 /* For DWOs coming from DWP files, we don't know the CU length
5037 nor the type's offset in the TU until now. */
5038 dwo_unit
->length
= get_cu_length (&cu
->header
);
5039 dwo_unit
->type_offset_in_tu
= type_offset_in_tu
;
5041 /* Establish the type offset that can be used to lookup the type.
5042 For DWO files, we don't know it until now. */
5043 sig_type
->type_offset_in_section
.sect_off
=
5044 dwo_unit
->offset
.sect_off
+ dwo_unit
->type_offset_in_tu
.cu_off
;
5048 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5051 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5052 /* For DWOs coming from DWP files, we don't know the CU length
5054 dwo_unit
->length
= get_cu_length (&cu
->header
);
5057 /* Replace the CU's original abbrev table with the DWO's.
5058 Reminder: We can't read the abbrev table until we've read the header. */
5059 if (abbrev_table_provided
)
5061 /* Don't free the provided abbrev table, the caller of
5062 init_cutu_and_read_dies owns it. */
5063 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5064 /* Ensure the DWO abbrev table gets freed. */
5065 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5069 dwarf2_free_abbrev_table (cu
);
5070 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5071 /* Leave any existing abbrev table cleanup as is. */
5074 /* Read in the die, but leave space to copy over the attributes
5075 from the stub. This has the benefit of simplifying the rest of
5076 the code - all the work to maintain the illusion of a single
5077 DW_TAG_{compile,type}_unit DIE is done here. */
5078 num_extra_attrs
= ((stmt_list
!= NULL
)
5082 + (comp_dir
!= NULL
));
5083 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
5084 result_has_children
, num_extra_attrs
);
5086 /* Copy over the attributes from the stub to the DIE we just read in. */
5087 comp_unit_die
= *result_comp_unit_die
;
5088 i
= comp_unit_die
->num_attrs
;
5089 if (stmt_list
!= NULL
)
5090 comp_unit_die
->attrs
[i
++] = *stmt_list
;
5092 comp_unit_die
->attrs
[i
++] = *low_pc
;
5093 if (high_pc
!= NULL
)
5094 comp_unit_die
->attrs
[i
++] = *high_pc
;
5096 comp_unit_die
->attrs
[i
++] = *ranges
;
5097 if (comp_dir
!= NULL
)
5098 comp_unit_die
->attrs
[i
++] = *comp_dir
;
5099 comp_unit_die
->num_attrs
+= num_extra_attrs
;
5101 if (dwarf2_die_debug
)
5103 fprintf_unfiltered (gdb_stdlog
,
5104 "Read die from %s@0x%x of %s:\n",
5105 get_section_name (section
),
5106 (unsigned) (begin_info_ptr
- section
->buffer
),
5107 bfd_get_filename (abfd
));
5108 dump_die (comp_unit_die
, dwarf2_die_debug
);
5111 /* Save the comp_dir attribute. If there is no DWP file then we'll read
5112 TUs by skipping the stub and going directly to the entry in the DWO file.
5113 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
5114 to get it via circuitous means. Blech. */
5115 if (comp_dir
!= NULL
)
5116 result_reader
->comp_dir
= DW_STRING (comp_dir
);
5118 /* Skip dummy compilation units. */
5119 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
5120 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5123 *result_info_ptr
= info_ptr
;
5127 /* Subroutine of init_cutu_and_read_dies to simplify it.
5128 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
5129 Returns NULL if the specified DWO unit cannot be found. */
5131 static struct dwo_unit
*
5132 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
5133 struct die_info
*comp_unit_die
)
5135 struct dwarf2_cu
*cu
= this_cu
->cu
;
5136 struct attribute
*attr
;
5138 struct dwo_unit
*dwo_unit
;
5139 const char *comp_dir
, *dwo_name
;
5141 gdb_assert (cu
!= NULL
);
5143 /* Yeah, we look dwo_name up again, but it simplifies the code. */
5144 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5145 gdb_assert (attr
!= NULL
);
5146 dwo_name
= DW_STRING (attr
);
5148 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
5150 comp_dir
= DW_STRING (attr
);
5152 if (this_cu
->is_debug_types
)
5154 struct signatured_type
*sig_type
;
5156 /* Since this_cu is the first member of struct signatured_type,
5157 we can go from a pointer to one to a pointer to the other. */
5158 sig_type
= (struct signatured_type
*) this_cu
;
5159 signature
= sig_type
->signature
;
5160 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
5164 struct attribute
*attr
;
5166 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
5168 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
5170 dwo_name
, objfile_name (this_cu
->objfile
));
5171 signature
= DW_UNSND (attr
);
5172 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
5179 /* Subroutine of init_cutu_and_read_dies to simplify it.
5180 Read a TU directly from a DWO file, bypassing the stub. */
5183 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
, int keep
,
5184 die_reader_func_ftype
*die_reader_func
,
5187 struct dwarf2_cu
*cu
;
5188 struct signatured_type
*sig_type
;
5189 struct cleanup
*cleanups
, *free_cu_cleanup
;
5190 struct die_reader_specs reader
;
5191 const gdb_byte
*info_ptr
;
5192 struct die_info
*comp_unit_die
;
5195 /* Verify we can do the following downcast, and that we have the
5197 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
5198 sig_type
= (struct signatured_type
*) this_cu
;
5199 gdb_assert (sig_type
->dwo_unit
!= NULL
);
5201 cleanups
= make_cleanup (null_cleanup
, NULL
);
5203 gdb_assert (this_cu
->cu
== NULL
);
5204 cu
= xmalloc (sizeof (*cu
));
5205 init_one_comp_unit (cu
, this_cu
);
5206 /* If an error occurs while loading, release our storage. */
5207 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5209 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
5210 0 /* abbrev_table_provided */,
5211 NULL
/* stub_comp_unit_die */,
5212 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
5214 &comp_unit_die
, &has_children
) == 0)
5217 do_cleanups (cleanups
);
5221 /* All the "real" work is done here. */
5222 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5224 /* This duplicates some code in init_cutu_and_read_dies,
5225 but the alternative is making the latter more complex.
5226 This function is only for the special case of using DWO files directly:
5227 no point in overly complicating the general case just to handle this. */
5230 /* We've successfully allocated this compilation unit. Let our
5231 caller clean it up when finished with it. */
5232 discard_cleanups (free_cu_cleanup
);
5234 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5235 So we have to manually free the abbrev table. */
5236 dwarf2_free_abbrev_table (cu
);
5238 /* Link this CU into read_in_chain. */
5239 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5240 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5243 do_cleanups (free_cu_cleanup
);
5245 do_cleanups (cleanups
);
5248 /* Initialize a CU (or TU) and read its DIEs.
5249 If the CU defers to a DWO file, read the DWO file as well.
5251 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
5252 Otherwise the table specified in the comp unit header is read in and used.
5253 This is an optimization for when we already have the abbrev table.
5255 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
5256 Otherwise, a new CU is allocated with xmalloc.
5258 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
5259 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
5261 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5262 linker) then DIE_READER_FUNC will not get called. */
5265 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
5266 struct abbrev_table
*abbrev_table
,
5267 int use_existing_cu
, int keep
,
5268 die_reader_func_ftype
*die_reader_func
,
5271 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5272 struct dwarf2_section_info
*section
= this_cu
->section
;
5273 bfd
*abfd
= get_section_bfd_owner (section
);
5274 struct dwarf2_cu
*cu
;
5275 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5276 struct die_reader_specs reader
;
5277 struct die_info
*comp_unit_die
;
5279 struct attribute
*attr
;
5280 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5281 struct signatured_type
*sig_type
= NULL
;
5282 struct dwarf2_section_info
*abbrev_section
;
5283 /* Non-zero if CU currently points to a DWO file and we need to
5284 reread it. When this happens we need to reread the skeleton die
5285 before we can reread the DWO file (this only applies to CUs, not TUs). */
5286 int rereading_dwo_cu
= 0;
5288 if (dwarf2_die_debug
)
5289 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5290 this_cu
->is_debug_types
? "type" : "comp",
5291 this_cu
->offset
.sect_off
);
5293 if (use_existing_cu
)
5296 /* If we're reading a TU directly from a DWO file, including a virtual DWO
5297 file (instead of going through the stub), short-circuit all of this. */
5298 if (this_cu
->reading_dwo_directly
)
5300 /* Narrow down the scope of possibilities to have to understand. */
5301 gdb_assert (this_cu
->is_debug_types
);
5302 gdb_assert (abbrev_table
== NULL
);
5303 gdb_assert (!use_existing_cu
);
5304 init_tu_and_read_dwo_dies (this_cu
, keep
, die_reader_func
, data
);
5308 cleanups
= make_cleanup (null_cleanup
, NULL
);
5310 /* This is cheap if the section is already read in. */
5311 dwarf2_read_section (objfile
, section
);
5313 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
5315 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
5317 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5321 /* If this CU is from a DWO file we need to start over, we need to
5322 refetch the attributes from the skeleton CU.
5323 This could be optimized by retrieving those attributes from when we
5324 were here the first time: the previous comp_unit_die was stored in
5325 comp_unit_obstack. But there's no data yet that we need this
5327 if (cu
->dwo_unit
!= NULL
)
5328 rereading_dwo_cu
= 1;
5332 /* If !use_existing_cu, this_cu->cu must be NULL. */
5333 gdb_assert (this_cu
->cu
== NULL
);
5335 cu
= xmalloc (sizeof (*cu
));
5336 init_one_comp_unit (cu
, this_cu
);
5338 /* If an error occurs while loading, release our storage. */
5339 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5342 /* Get the header. */
5343 if (cu
->header
.first_die_offset
.cu_off
!= 0 && ! rereading_dwo_cu
)
5345 /* We already have the header, there's no need to read it in again. */
5346 info_ptr
+= cu
->header
.first_die_offset
.cu_off
;
5350 if (this_cu
->is_debug_types
)
5353 cu_offset type_offset_in_tu
;
5355 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
5356 abbrev_section
, info_ptr
,
5358 &type_offset_in_tu
);
5360 /* Since per_cu is the first member of struct signatured_type,
5361 we can go from a pointer to one to a pointer to the other. */
5362 sig_type
= (struct signatured_type
*) this_cu
;
5363 gdb_assert (sig_type
->signature
== signature
);
5364 gdb_assert (sig_type
->type_offset_in_tu
.cu_off
5365 == type_offset_in_tu
.cu_off
);
5366 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5368 /* LENGTH has not been set yet for type units if we're
5369 using .gdb_index. */
5370 this_cu
->length
= get_cu_length (&cu
->header
);
5372 /* Establish the type offset that can be used to lookup the type. */
5373 sig_type
->type_offset_in_section
.sect_off
=
5374 this_cu
->offset
.sect_off
+ sig_type
->type_offset_in_tu
.cu_off
;
5378 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5382 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5383 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
5387 /* Skip dummy compilation units. */
5388 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5389 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5391 do_cleanups (cleanups
);
5395 /* If we don't have them yet, read the abbrevs for this compilation unit.
5396 And if we need to read them now, make sure they're freed when we're
5397 done. Note that it's important that if the CU had an abbrev table
5398 on entry we don't free it when we're done: Somewhere up the call stack
5399 it may be in use. */
5400 if (abbrev_table
!= NULL
)
5402 gdb_assert (cu
->abbrev_table
== NULL
);
5403 gdb_assert (cu
->header
.abbrev_offset
.sect_off
5404 == abbrev_table
->offset
.sect_off
);
5405 cu
->abbrev_table
= abbrev_table
;
5407 else if (cu
->abbrev_table
== NULL
)
5409 dwarf2_read_abbrevs (cu
, abbrev_section
);
5410 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5412 else if (rereading_dwo_cu
)
5414 dwarf2_free_abbrev_table (cu
);
5415 dwarf2_read_abbrevs (cu
, abbrev_section
);
5418 /* Read the top level CU/TU die. */
5419 init_cu_die_reader (&reader
, cu
, section
, NULL
);
5420 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5422 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
5424 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
5425 DWO CU, that this test will fail (the attribute will not be present). */
5426 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5429 struct dwo_unit
*dwo_unit
;
5430 struct die_info
*dwo_comp_unit_die
;
5434 complaint (&symfile_complaints
,
5435 _("compilation unit with DW_AT_GNU_dwo_name"
5436 " has children (offset 0x%x) [in module %s]"),
5437 this_cu
->offset
.sect_off
, bfd_get_filename (abfd
));
5439 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
);
5440 if (dwo_unit
!= NULL
)
5442 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
5443 abbrev_table
!= NULL
,
5444 comp_unit_die
, NULL
,
5446 &dwo_comp_unit_die
, &has_children
) == 0)
5449 do_cleanups (cleanups
);
5452 comp_unit_die
= dwo_comp_unit_die
;
5456 /* Yikes, we couldn't find the rest of the DIE, we only have
5457 the stub. A complaint has already been logged. There's
5458 not much more we can do except pass on the stub DIE to
5459 die_reader_func. We don't want to throw an error on bad
5464 /* All of the above is setup for this call. Yikes. */
5465 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5467 /* Done, clean up. */
5468 if (free_cu_cleanup
!= NULL
)
5472 /* We've successfully allocated this compilation unit. Let our
5473 caller clean it up when finished with it. */
5474 discard_cleanups (free_cu_cleanup
);
5476 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5477 So we have to manually free the abbrev table. */
5478 dwarf2_free_abbrev_table (cu
);
5480 /* Link this CU into read_in_chain. */
5481 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5482 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5485 do_cleanups (free_cu_cleanup
);
5488 do_cleanups (cleanups
);
5491 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present.
5492 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed
5493 to have already done the lookup to find the DWO file).
5495 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
5496 THIS_CU->is_debug_types, but nothing else.
5498 We fill in THIS_CU->length.
5500 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5501 linker) then DIE_READER_FUNC will not get called.
5503 THIS_CU->cu is always freed when done.
5504 This is done in order to not leave THIS_CU->cu in a state where we have
5505 to care whether it refers to the "main" CU or the DWO CU. */
5508 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
5509 struct dwo_file
*dwo_file
,
5510 die_reader_func_ftype
*die_reader_func
,
5513 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5514 struct dwarf2_section_info
*section
= this_cu
->section
;
5515 bfd
*abfd
= get_section_bfd_owner (section
);
5516 struct dwarf2_section_info
*abbrev_section
;
5517 struct dwarf2_cu cu
;
5518 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5519 struct die_reader_specs reader
;
5520 struct cleanup
*cleanups
;
5521 struct die_info
*comp_unit_die
;
5524 if (dwarf2_die_debug
)
5525 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5526 this_cu
->is_debug_types
? "type" : "comp",
5527 this_cu
->offset
.sect_off
);
5529 gdb_assert (this_cu
->cu
== NULL
);
5531 abbrev_section
= (dwo_file
!= NULL
5532 ? &dwo_file
->sections
.abbrev
5533 : get_abbrev_section_for_cu (this_cu
));
5535 /* This is cheap if the section is already read in. */
5536 dwarf2_read_section (objfile
, section
);
5538 init_one_comp_unit (&cu
, this_cu
);
5540 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
5542 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
5543 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, section
,
5544 abbrev_section
, info_ptr
,
5545 this_cu
->is_debug_types
);
5547 this_cu
->length
= get_cu_length (&cu
.header
);
5549 /* Skip dummy compilation units. */
5550 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5551 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5553 do_cleanups (cleanups
);
5557 dwarf2_read_abbrevs (&cu
, abbrev_section
);
5558 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
5560 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
);
5561 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5563 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5565 do_cleanups (cleanups
);
5568 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
5569 does not lookup the specified DWO file.
5570 This cannot be used to read DWO files.
5572 THIS_CU->cu is always freed when done.
5573 This is done in order to not leave THIS_CU->cu in a state where we have
5574 to care whether it refers to the "main" CU or the DWO CU.
5575 We can revisit this if the data shows there's a performance issue. */
5578 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
5579 die_reader_func_ftype
*die_reader_func
,
5582 init_cutu_and_read_dies_no_follow (this_cu
, NULL
, die_reader_func
, data
);
5585 /* Type Unit Groups.
5587 Type Unit Groups are a way to collapse the set of all TUs (type units) into
5588 a more manageable set. The grouping is done by DW_AT_stmt_list entry
5589 so that all types coming from the same compilation (.o file) are grouped
5590 together. A future step could be to put the types in the same symtab as
5591 the CU the types ultimately came from. */
5594 hash_type_unit_group (const void *item
)
5596 const struct type_unit_group
*tu_group
= item
;
5598 return hash_stmt_list_entry (&tu_group
->hash
);
5602 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
5604 const struct type_unit_group
*lhs
= item_lhs
;
5605 const struct type_unit_group
*rhs
= item_rhs
;
5607 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
5610 /* Allocate a hash table for type unit groups. */
5613 allocate_type_unit_groups_table (void)
5615 return htab_create_alloc_ex (3,
5616 hash_type_unit_group
,
5619 &dwarf2_per_objfile
->objfile
->objfile_obstack
,
5620 hashtab_obstack_allocate
,
5621 dummy_obstack_deallocate
);
5624 /* Type units that don't have DW_AT_stmt_list are grouped into their own
5625 partial symtabs. We combine several TUs per psymtab to not let the size
5626 of any one psymtab grow too big. */
5627 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
5628 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
5630 /* Helper routine for get_type_unit_group.
5631 Create the type_unit_group object used to hold one or more TUs. */
5633 static struct type_unit_group
*
5634 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
5636 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5637 struct dwarf2_per_cu_data
*per_cu
;
5638 struct type_unit_group
*tu_group
;
5640 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5641 struct type_unit_group
);
5642 per_cu
= &tu_group
->per_cu
;
5643 per_cu
->objfile
= objfile
;
5645 if (dwarf2_per_objfile
->using_index
)
5647 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5648 struct dwarf2_per_cu_quick_data
);
5652 unsigned int line_offset
= line_offset_struct
.sect_off
;
5653 struct partial_symtab
*pst
;
5656 /* Give the symtab a useful name for debug purposes. */
5657 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
5658 name
= xstrprintf ("<type_units_%d>",
5659 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
5661 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
5663 pst
= create_partial_symtab (per_cu
, name
);
5669 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
5670 tu_group
->hash
.line_offset
= line_offset_struct
;
5675 /* Look up the type_unit_group for type unit CU, and create it if necessary.
5676 STMT_LIST is a DW_AT_stmt_list attribute. */
5678 static struct type_unit_group
*
5679 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
5681 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
5682 struct type_unit_group
*tu_group
;
5684 unsigned int line_offset
;
5685 struct type_unit_group type_unit_group_for_lookup
;
5687 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
5689 dwarf2_per_objfile
->type_unit_groups
=
5690 allocate_type_unit_groups_table ();
5693 /* Do we need to create a new group, or can we use an existing one? */
5697 line_offset
= DW_UNSND (stmt_list
);
5698 ++tu_stats
->nr_symtab_sharers
;
5702 /* Ugh, no stmt_list. Rare, but we have to handle it.
5703 We can do various things here like create one group per TU or
5704 spread them over multiple groups to split up the expansion work.
5705 To avoid worst case scenarios (too many groups or too large groups)
5706 we, umm, group them in bunches. */
5707 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
5708 | (tu_stats
->nr_stmt_less_type_units
5709 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
5710 ++tu_stats
->nr_stmt_less_type_units
;
5713 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
5714 type_unit_group_for_lookup
.hash
.line_offset
.sect_off
= line_offset
;
5715 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
5716 &type_unit_group_for_lookup
, INSERT
);
5720 gdb_assert (tu_group
!= NULL
);
5724 sect_offset line_offset_struct
;
5726 line_offset_struct
.sect_off
= line_offset
;
5727 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
5729 ++tu_stats
->nr_symtabs
;
5735 /* Partial symbol tables. */
5737 /* Create a psymtab named NAME and assign it to PER_CU.
5739 The caller must fill in the following details:
5740 dirname, textlow, texthigh. */
5742 static struct partial_symtab
*
5743 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
5745 struct objfile
*objfile
= per_cu
->objfile
;
5746 struct partial_symtab
*pst
;
5748 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
5750 objfile
->global_psymbols
.next
,
5751 objfile
->static_psymbols
.next
);
5753 pst
->psymtabs_addrmap_supported
= 1;
5755 /* This is the glue that links PST into GDB's symbol API. */
5756 pst
->read_symtab_private
= per_cu
;
5757 pst
->read_symtab
= dwarf2_read_symtab
;
5758 per_cu
->v
.psymtab
= pst
;
5763 /* The DATA object passed to process_psymtab_comp_unit_reader has this
5766 struct process_psymtab_comp_unit_data
5768 /* True if we are reading a DW_TAG_partial_unit. */
5770 int want_partial_unit
;
5772 /* The "pretend" language that is used if the CU doesn't declare a
5775 enum language pretend_language
;
5778 /* die_reader_func for process_psymtab_comp_unit. */
5781 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
5782 const gdb_byte
*info_ptr
,
5783 struct die_info
*comp_unit_die
,
5787 struct dwarf2_cu
*cu
= reader
->cu
;
5788 struct objfile
*objfile
= cu
->objfile
;
5789 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
5790 struct attribute
*attr
;
5792 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
5793 struct partial_symtab
*pst
;
5795 const char *filename
;
5796 struct process_psymtab_comp_unit_data
*info
= data
;
5798 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !info
->want_partial_unit
)
5801 gdb_assert (! per_cu
->is_debug_types
);
5803 prepare_one_comp_unit (cu
, comp_unit_die
, info
->pretend_language
);
5805 cu
->list_in_scope
= &file_symbols
;
5807 /* Allocate a new partial symbol table structure. */
5808 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, cu
);
5809 if (attr
== NULL
|| !DW_STRING (attr
))
5812 filename
= DW_STRING (attr
);
5814 pst
= create_partial_symtab (per_cu
, filename
);
5816 /* This must be done before calling dwarf2_build_include_psymtabs. */
5817 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
5819 pst
->dirname
= DW_STRING (attr
);
5821 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5823 dwarf2_find_base_address (comp_unit_die
, cu
);
5825 /* Possibly set the default values of LOWPC and HIGHPC from
5827 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
5828 &best_highpc
, cu
, pst
);
5829 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
5830 /* Store the contiguous range if it is not empty; it can be empty for
5831 CUs with no code. */
5832 addrmap_set_empty (objfile
->psymtabs_addrmap
,
5833 best_lowpc
+ baseaddr
,
5834 best_highpc
+ baseaddr
- 1, pst
);
5836 /* Check if comp unit has_children.
5837 If so, read the rest of the partial symbols from this comp unit.
5838 If not, there's no more debug_info for this comp unit. */
5841 struct partial_die_info
*first_die
;
5842 CORE_ADDR lowpc
, highpc
;
5844 lowpc
= ((CORE_ADDR
) -1);
5845 highpc
= ((CORE_ADDR
) 0);
5847 first_die
= load_partial_dies (reader
, info_ptr
, 1);
5849 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
5852 /* If we didn't find a lowpc, set it to highpc to avoid
5853 complaints from `maint check'. */
5854 if (lowpc
== ((CORE_ADDR
) -1))
5857 /* If the compilation unit didn't have an explicit address range,
5858 then use the information extracted from its child dies. */
5862 best_highpc
= highpc
;
5865 pst
->textlow
= best_lowpc
+ baseaddr
;
5866 pst
->texthigh
= best_highpc
+ baseaddr
;
5868 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
5869 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
5870 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
5871 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
5872 sort_pst_symbols (objfile
, pst
);
5874 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
5877 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
5878 struct dwarf2_per_cu_data
*iter
;
5880 /* Fill in 'dependencies' here; we fill in 'users' in a
5882 pst
->number_of_dependencies
= len
;
5883 pst
->dependencies
= obstack_alloc (&objfile
->objfile_obstack
,
5884 len
* sizeof (struct symtab
*));
5886 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
5889 pst
->dependencies
[i
] = iter
->v
.psymtab
;
5891 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
5894 /* Get the list of files included in the current compilation unit,
5895 and build a psymtab for each of them. */
5896 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
5898 if (dwarf2_read_debug
)
5900 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
5902 fprintf_unfiltered (gdb_stdlog
,
5903 "Psymtab for %s unit @0x%x: %s - %s"
5904 ", %d global, %d static syms\n",
5905 per_cu
->is_debug_types
? "type" : "comp",
5906 per_cu
->offset
.sect_off
,
5907 paddress (gdbarch
, pst
->textlow
),
5908 paddress (gdbarch
, pst
->texthigh
),
5909 pst
->n_global_syms
, pst
->n_static_syms
);
5913 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
5914 Process compilation unit THIS_CU for a psymtab. */
5917 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
5918 int want_partial_unit
,
5919 enum language pretend_language
)
5921 struct process_psymtab_comp_unit_data info
;
5923 /* If this compilation unit was already read in, free the
5924 cached copy in order to read it in again. This is
5925 necessary because we skipped some symbols when we first
5926 read in the compilation unit (see load_partial_dies).
5927 This problem could be avoided, but the benefit is unclear. */
5928 if (this_cu
->cu
!= NULL
)
5929 free_one_cached_comp_unit (this_cu
);
5931 gdb_assert (! this_cu
->is_debug_types
);
5932 info
.want_partial_unit
= want_partial_unit
;
5933 info
.pretend_language
= pretend_language
;
5934 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0,
5935 process_psymtab_comp_unit_reader
,
5938 /* Age out any secondary CUs. */
5939 age_cached_comp_units ();
5942 /* Reader function for build_type_psymtabs. */
5945 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
5946 const gdb_byte
*info_ptr
,
5947 struct die_info
*type_unit_die
,
5951 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5952 struct dwarf2_cu
*cu
= reader
->cu
;
5953 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
5954 struct signatured_type
*sig_type
;
5955 struct type_unit_group
*tu_group
;
5956 struct attribute
*attr
;
5957 struct partial_die_info
*first_die
;
5958 CORE_ADDR lowpc
, highpc
;
5959 struct partial_symtab
*pst
;
5961 gdb_assert (data
== NULL
);
5962 gdb_assert (per_cu
->is_debug_types
);
5963 sig_type
= (struct signatured_type
*) per_cu
;
5968 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
5969 tu_group
= get_type_unit_group (cu
, attr
);
5971 VEC_safe_push (sig_type_ptr
, tu_group
->tus
, sig_type
);
5973 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
5974 cu
->list_in_scope
= &file_symbols
;
5975 pst
= create_partial_symtab (per_cu
, "");
5978 first_die
= load_partial_dies (reader
, info_ptr
, 1);
5980 lowpc
= (CORE_ADDR
) -1;
5981 highpc
= (CORE_ADDR
) 0;
5982 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
5984 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
5985 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
5986 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
5987 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
5988 sort_pst_symbols (objfile
, pst
);
5991 /* Struct used to sort TUs by their abbreviation table offset. */
5993 struct tu_abbrev_offset
5995 struct signatured_type
*sig_type
;
5996 sect_offset abbrev_offset
;
5999 /* Helper routine for build_type_psymtabs_1, passed to qsort. */
6002 sort_tu_by_abbrev_offset (const void *ap
, const void *bp
)
6004 const struct tu_abbrev_offset
* const *a
= ap
;
6005 const struct tu_abbrev_offset
* const *b
= bp
;
6006 unsigned int aoff
= (*a
)->abbrev_offset
.sect_off
;
6007 unsigned int boff
= (*b
)->abbrev_offset
.sect_off
;
6009 return (aoff
> boff
) - (aoff
< boff
);
6012 /* Efficiently read all the type units.
6013 This does the bulk of the work for build_type_psymtabs.
6015 The efficiency is because we sort TUs by the abbrev table they use and
6016 only read each abbrev table once. In one program there are 200K TUs
6017 sharing 8K abbrev tables.
6019 The main purpose of this function is to support building the
6020 dwarf2_per_objfile->type_unit_groups table.
6021 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
6022 can collapse the search space by grouping them by stmt_list.
6023 The savings can be significant, in the same program from above the 200K TUs
6024 share 8K stmt_list tables.
6026 FUNC is expected to call get_type_unit_group, which will create the
6027 struct type_unit_group if necessary and add it to
6028 dwarf2_per_objfile->type_unit_groups. */
6031 build_type_psymtabs_1 (void)
6033 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6034 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6035 struct cleanup
*cleanups
;
6036 struct abbrev_table
*abbrev_table
;
6037 sect_offset abbrev_offset
;
6038 struct tu_abbrev_offset
*sorted_by_abbrev
;
6039 struct type_unit_group
**iter
;
6042 /* It's up to the caller to not call us multiple times. */
6043 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
6045 if (dwarf2_per_objfile
->n_type_units
== 0)
6048 /* TUs typically share abbrev tables, and there can be way more TUs than
6049 abbrev tables. Sort by abbrev table to reduce the number of times we
6050 read each abbrev table in.
6051 Alternatives are to punt or to maintain a cache of abbrev tables.
6052 This is simpler and efficient enough for now.
6054 Later we group TUs by their DW_AT_stmt_list value (as this defines the
6055 symtab to use). Typically TUs with the same abbrev offset have the same
6056 stmt_list value too so in practice this should work well.
6058 The basic algorithm here is:
6060 sort TUs by abbrev table
6061 for each TU with same abbrev table:
6062 read abbrev table if first user
6063 read TU top level DIE
6064 [IWBN if DWO skeletons had DW_AT_stmt_list]
6067 if (dwarf2_read_debug
)
6068 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
6070 /* Sort in a separate table to maintain the order of all_type_units
6071 for .gdb_index: TU indices directly index all_type_units. */
6072 sorted_by_abbrev
= XNEWVEC (struct tu_abbrev_offset
,
6073 dwarf2_per_objfile
->n_type_units
);
6074 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6076 struct signatured_type
*sig_type
= dwarf2_per_objfile
->all_type_units
[i
];
6078 sorted_by_abbrev
[i
].sig_type
= sig_type
;
6079 sorted_by_abbrev
[i
].abbrev_offset
=
6080 read_abbrev_offset (sig_type
->per_cu
.section
,
6081 sig_type
->per_cu
.offset
);
6083 cleanups
= make_cleanup (xfree
, sorted_by_abbrev
);
6084 qsort (sorted_by_abbrev
, dwarf2_per_objfile
->n_type_units
,
6085 sizeof (struct tu_abbrev_offset
), sort_tu_by_abbrev_offset
);
6087 abbrev_offset
.sect_off
= ~(unsigned) 0;
6088 abbrev_table
= NULL
;
6089 make_cleanup (abbrev_table_free_cleanup
, &abbrev_table
);
6091 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6093 const struct tu_abbrev_offset
*tu
= &sorted_by_abbrev
[i
];
6095 /* Switch to the next abbrev table if necessary. */
6096 if (abbrev_table
== NULL
6097 || tu
->abbrev_offset
.sect_off
!= abbrev_offset
.sect_off
)
6099 if (abbrev_table
!= NULL
)
6101 abbrev_table_free (abbrev_table
);
6102 /* Reset to NULL in case abbrev_table_read_table throws
6103 an error: abbrev_table_free_cleanup will get called. */
6104 abbrev_table
= NULL
;
6106 abbrev_offset
= tu
->abbrev_offset
;
6108 abbrev_table_read_table (&dwarf2_per_objfile
->abbrev
,
6110 ++tu_stats
->nr_uniq_abbrev_tables
;
6113 init_cutu_and_read_dies (&tu
->sig_type
->per_cu
, abbrev_table
, 0, 0,
6114 build_type_psymtabs_reader
, NULL
);
6117 /* type_unit_groups can be NULL if there is an error in the debug info.
6118 Just create an empty table so the rest of gdb doesn't have to watch
6119 for this error case. */
6120 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
6122 dwarf2_per_objfile
->type_unit_groups
=
6123 allocate_type_unit_groups_table ();
6126 do_cleanups (cleanups
);
6128 if (dwarf2_read_debug
)
6130 fprintf_unfiltered (gdb_stdlog
, "Done building type unit groups:\n");
6131 fprintf_unfiltered (gdb_stdlog
, " %d TUs\n",
6132 dwarf2_per_objfile
->n_type_units
);
6133 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
6134 tu_stats
->nr_uniq_abbrev_tables
);
6135 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
6136 tu_stats
->nr_symtabs
);
6137 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
6138 tu_stats
->nr_symtab_sharers
);
6139 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
6140 tu_stats
->nr_stmt_less_type_units
);
6144 /* Traversal function for build_type_psymtabs. */
6147 build_type_psymtab_dependencies (void **slot
, void *info
)
6149 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6150 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
6151 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
6152 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6153 int len
= VEC_length (sig_type_ptr
, tu_group
->tus
);
6154 struct signatured_type
*iter
;
6157 gdb_assert (len
> 0);
6158 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
6160 pst
->number_of_dependencies
= len
;
6161 pst
->dependencies
= obstack_alloc (&objfile
->objfile_obstack
,
6162 len
* sizeof (struct psymtab
*));
6164 VEC_iterate (sig_type_ptr
, tu_group
->tus
, i
, iter
);
6167 gdb_assert (iter
->per_cu
.is_debug_types
);
6168 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
6169 iter
->type_unit_group
= tu_group
;
6172 VEC_free (sig_type_ptr
, tu_group
->tus
);
6177 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6178 Build partial symbol tables for the .debug_types comp-units. */
6181 build_type_psymtabs (struct objfile
*objfile
)
6183 if (! create_all_type_units (objfile
))
6186 build_type_psymtabs_1 ();
6188 /* Now that all TUs have been processed we can fill in the dependencies. */
6189 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
6190 build_type_psymtab_dependencies
, NULL
);
6193 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
6196 psymtabs_addrmap_cleanup (void *o
)
6198 struct objfile
*objfile
= o
;
6200 objfile
->psymtabs_addrmap
= NULL
;
6203 /* Compute the 'user' field for each psymtab in OBJFILE. */
6206 set_partial_user (struct objfile
*objfile
)
6210 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6212 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6213 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6219 for (j
= 0; j
< pst
->number_of_dependencies
; ++j
)
6221 /* Set the 'user' field only if it is not already set. */
6222 if (pst
->dependencies
[j
]->user
== NULL
)
6223 pst
->dependencies
[j
]->user
= pst
;
6228 /* Build the partial symbol table by doing a quick pass through the
6229 .debug_info and .debug_abbrev sections. */
6232 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
6234 struct cleanup
*back_to
, *addrmap_cleanup
;
6235 struct obstack temp_obstack
;
6238 if (dwarf2_read_debug
)
6240 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
6241 objfile_name (objfile
));
6244 dwarf2_per_objfile
->reading_partial_symbols
= 1;
6246 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
6248 /* Any cached compilation units will be linked by the per-objfile
6249 read_in_chain. Make sure to free them when we're done. */
6250 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
6252 build_type_psymtabs (objfile
);
6254 create_all_comp_units (objfile
);
6256 /* Create a temporary address map on a temporary obstack. We later
6257 copy this to the final obstack. */
6258 obstack_init (&temp_obstack
);
6259 make_cleanup_obstack_free (&temp_obstack
);
6260 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
6261 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
6263 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6265 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6267 process_psymtab_comp_unit (per_cu
, 0, language_minimal
);
6270 set_partial_user (objfile
);
6272 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
6273 &objfile
->objfile_obstack
);
6274 discard_cleanups (addrmap_cleanup
);
6276 do_cleanups (back_to
);
6278 if (dwarf2_read_debug
)
6279 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
6280 objfile_name (objfile
));
6283 /* die_reader_func for load_partial_comp_unit. */
6286 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
6287 const gdb_byte
*info_ptr
,
6288 struct die_info
*comp_unit_die
,
6292 struct dwarf2_cu
*cu
= reader
->cu
;
6294 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
6296 /* Check if comp unit has_children.
6297 If so, read the rest of the partial symbols from this comp unit.
6298 If not, there's no more debug_info for this comp unit. */
6300 load_partial_dies (reader
, info_ptr
, 0);
6303 /* Load the partial DIEs for a secondary CU into memory.
6304 This is also used when rereading a primary CU with load_all_dies. */
6307 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
6309 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
6310 load_partial_comp_unit_reader
, NULL
);
6314 read_comp_units_from_section (struct objfile
*objfile
,
6315 struct dwarf2_section_info
*section
,
6316 unsigned int is_dwz
,
6319 struct dwarf2_per_cu_data
***all_comp_units
)
6321 const gdb_byte
*info_ptr
;
6322 bfd
*abfd
= get_section_bfd_owner (section
);
6324 if (dwarf2_read_debug
)
6325 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
6326 get_section_name (section
),
6327 get_section_file_name (section
));
6329 dwarf2_read_section (objfile
, section
);
6331 info_ptr
= section
->buffer
;
6333 while (info_ptr
< section
->buffer
+ section
->size
)
6335 unsigned int length
, initial_length_size
;
6336 struct dwarf2_per_cu_data
*this_cu
;
6339 offset
.sect_off
= info_ptr
- section
->buffer
;
6341 /* Read just enough information to find out where the next
6342 compilation unit is. */
6343 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6345 /* Save the compilation unit for later lookup. */
6346 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
6347 sizeof (struct dwarf2_per_cu_data
));
6348 memset (this_cu
, 0, sizeof (*this_cu
));
6349 this_cu
->offset
= offset
;
6350 this_cu
->length
= length
+ initial_length_size
;
6351 this_cu
->is_dwz
= is_dwz
;
6352 this_cu
->objfile
= objfile
;
6353 this_cu
->section
= section
;
6355 if (*n_comp_units
== *n_allocated
)
6358 *all_comp_units
= xrealloc (*all_comp_units
,
6360 * sizeof (struct dwarf2_per_cu_data
*));
6362 (*all_comp_units
)[*n_comp_units
] = this_cu
;
6365 info_ptr
= info_ptr
+ this_cu
->length
;
6369 /* Create a list of all compilation units in OBJFILE.
6370 This is only done for -readnow and building partial symtabs. */
6373 create_all_comp_units (struct objfile
*objfile
)
6377 struct dwarf2_per_cu_data
**all_comp_units
;
6378 struct dwz_file
*dwz
;
6382 all_comp_units
= xmalloc (n_allocated
6383 * sizeof (struct dwarf2_per_cu_data
*));
6385 read_comp_units_from_section (objfile
, &dwarf2_per_objfile
->info
, 0,
6386 &n_allocated
, &n_comp_units
, &all_comp_units
);
6388 dwz
= dwarf2_get_dwz_file ();
6390 read_comp_units_from_section (objfile
, &dwz
->info
, 1,
6391 &n_allocated
, &n_comp_units
,
6394 dwarf2_per_objfile
->all_comp_units
6395 = obstack_alloc (&objfile
->objfile_obstack
,
6396 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
6397 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
6398 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
6399 xfree (all_comp_units
);
6400 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
6403 /* Process all loaded DIEs for compilation unit CU, starting at
6404 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
6405 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
6406 DW_AT_ranges). If NEED_PC is set, then this function will set
6407 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
6408 and record the covered ranges in the addrmap. */
6411 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
6412 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
6414 struct partial_die_info
*pdi
;
6416 /* Now, march along the PDI's, descending into ones which have
6417 interesting children but skipping the children of the other ones,
6418 until we reach the end of the compilation unit. */
6424 fixup_partial_die (pdi
, cu
);
6426 /* Anonymous namespaces or modules have no name but have interesting
6427 children, so we need to look at them. Ditto for anonymous
6430 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
6431 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
6432 || pdi
->tag
== DW_TAG_imported_unit
)
6436 case DW_TAG_subprogram
:
6437 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
6439 case DW_TAG_constant
:
6440 case DW_TAG_variable
:
6441 case DW_TAG_typedef
:
6442 case DW_TAG_union_type
:
6443 if (!pdi
->is_declaration
)
6445 add_partial_symbol (pdi
, cu
);
6448 case DW_TAG_class_type
:
6449 case DW_TAG_interface_type
:
6450 case DW_TAG_structure_type
:
6451 if (!pdi
->is_declaration
)
6453 add_partial_symbol (pdi
, cu
);
6456 case DW_TAG_enumeration_type
:
6457 if (!pdi
->is_declaration
)
6458 add_partial_enumeration (pdi
, cu
);
6460 case DW_TAG_base_type
:
6461 case DW_TAG_subrange_type
:
6462 /* File scope base type definitions are added to the partial
6464 add_partial_symbol (pdi
, cu
);
6466 case DW_TAG_namespace
:
6467 add_partial_namespace (pdi
, lowpc
, highpc
, need_pc
, cu
);
6470 add_partial_module (pdi
, lowpc
, highpc
, need_pc
, cu
);
6472 case DW_TAG_imported_unit
:
6474 struct dwarf2_per_cu_data
*per_cu
;
6476 /* For now we don't handle imported units in type units. */
6477 if (cu
->per_cu
->is_debug_types
)
6479 error (_("Dwarf Error: DW_TAG_imported_unit is not"
6480 " supported in type units [in module %s]"),
6481 objfile_name (cu
->objfile
));
6484 per_cu
= dwarf2_find_containing_comp_unit (pdi
->d
.offset
,
6488 /* Go read the partial unit, if needed. */
6489 if (per_cu
->v
.psymtab
== NULL
)
6490 process_psymtab_comp_unit (per_cu
, 1, cu
->language
);
6492 VEC_safe_push (dwarf2_per_cu_ptr
,
6493 cu
->per_cu
->imported_symtabs
, per_cu
);
6496 case DW_TAG_imported_declaration
:
6497 add_partial_symbol (pdi
, cu
);
6504 /* If the die has a sibling, skip to the sibling. */
6506 pdi
= pdi
->die_sibling
;
6510 /* Functions used to compute the fully scoped name of a partial DIE.
6512 Normally, this is simple. For C++, the parent DIE's fully scoped
6513 name is concatenated with "::" and the partial DIE's name. For
6514 Java, the same thing occurs except that "." is used instead of "::".
6515 Enumerators are an exception; they use the scope of their parent
6516 enumeration type, i.e. the name of the enumeration type is not
6517 prepended to the enumerator.
6519 There are two complexities. One is DW_AT_specification; in this
6520 case "parent" means the parent of the target of the specification,
6521 instead of the direct parent of the DIE. The other is compilers
6522 which do not emit DW_TAG_namespace; in this case we try to guess
6523 the fully qualified name of structure types from their members'
6524 linkage names. This must be done using the DIE's children rather
6525 than the children of any DW_AT_specification target. We only need
6526 to do this for structures at the top level, i.e. if the target of
6527 any DW_AT_specification (if any; otherwise the DIE itself) does not
6530 /* Compute the scope prefix associated with PDI's parent, in
6531 compilation unit CU. The result will be allocated on CU's
6532 comp_unit_obstack, or a copy of the already allocated PDI->NAME
6533 field. NULL is returned if no prefix is necessary. */
6535 partial_die_parent_scope (struct partial_die_info
*pdi
,
6536 struct dwarf2_cu
*cu
)
6538 const char *grandparent_scope
;
6539 struct partial_die_info
*parent
, *real_pdi
;
6541 /* We need to look at our parent DIE; if we have a DW_AT_specification,
6542 then this means the parent of the specification DIE. */
6545 while (real_pdi
->has_specification
)
6546 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
6547 real_pdi
->spec_is_dwz
, cu
);
6549 parent
= real_pdi
->die_parent
;
6553 if (parent
->scope_set
)
6554 return parent
->scope
;
6556 fixup_partial_die (parent
, cu
);
6558 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
6560 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
6561 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
6562 Work around this problem here. */
6563 if (cu
->language
== language_cplus
6564 && parent
->tag
== DW_TAG_namespace
6565 && strcmp (parent
->name
, "::") == 0
6566 && grandparent_scope
== NULL
)
6568 parent
->scope
= NULL
;
6569 parent
->scope_set
= 1;
6573 if (pdi
->tag
== DW_TAG_enumerator
)
6574 /* Enumerators should not get the name of the enumeration as a prefix. */
6575 parent
->scope
= grandparent_scope
;
6576 else if (parent
->tag
== DW_TAG_namespace
6577 || parent
->tag
== DW_TAG_module
6578 || parent
->tag
== DW_TAG_structure_type
6579 || parent
->tag
== DW_TAG_class_type
6580 || parent
->tag
== DW_TAG_interface_type
6581 || parent
->tag
== DW_TAG_union_type
6582 || parent
->tag
== DW_TAG_enumeration_type
)
6584 if (grandparent_scope
== NULL
)
6585 parent
->scope
= parent
->name
;
6587 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
6589 parent
->name
, 0, cu
);
6593 /* FIXME drow/2004-04-01: What should we be doing with
6594 function-local names? For partial symbols, we should probably be
6596 complaint (&symfile_complaints
,
6597 _("unhandled containing DIE tag %d for DIE at %d"),
6598 parent
->tag
, pdi
->offset
.sect_off
);
6599 parent
->scope
= grandparent_scope
;
6602 parent
->scope_set
= 1;
6603 return parent
->scope
;
6606 /* Return the fully scoped name associated with PDI, from compilation unit
6607 CU. The result will be allocated with malloc. */
6610 partial_die_full_name (struct partial_die_info
*pdi
,
6611 struct dwarf2_cu
*cu
)
6613 const char *parent_scope
;
6615 /* If this is a template instantiation, we can not work out the
6616 template arguments from partial DIEs. So, unfortunately, we have
6617 to go through the full DIEs. At least any work we do building
6618 types here will be reused if full symbols are loaded later. */
6619 if (pdi
->has_template_arguments
)
6621 fixup_partial_die (pdi
, cu
);
6623 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
6625 struct die_info
*die
;
6626 struct attribute attr
;
6627 struct dwarf2_cu
*ref_cu
= cu
;
6629 /* DW_FORM_ref_addr is using section offset. */
6631 attr
.form
= DW_FORM_ref_addr
;
6632 attr
.u
.unsnd
= pdi
->offset
.sect_off
;
6633 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
6635 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
6639 parent_scope
= partial_die_parent_scope (pdi
, cu
);
6640 if (parent_scope
== NULL
)
6643 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
6647 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
6649 struct objfile
*objfile
= cu
->objfile
;
6651 const char *actual_name
= NULL
;
6653 char *built_actual_name
;
6655 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6657 built_actual_name
= partial_die_full_name (pdi
, cu
);
6658 if (built_actual_name
!= NULL
)
6659 actual_name
= built_actual_name
;
6661 if (actual_name
== NULL
)
6662 actual_name
= pdi
->name
;
6666 case DW_TAG_subprogram
:
6667 if (pdi
->is_external
|| cu
->language
== language_ada
)
6669 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
6670 of the global scope. But in Ada, we want to be able to access
6671 nested procedures globally. So all Ada subprograms are stored
6672 in the global scope. */
6673 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
6674 mst_text, objfile); */
6675 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6676 built_actual_name
!= NULL
,
6677 VAR_DOMAIN
, LOC_BLOCK
,
6678 &objfile
->global_psymbols
,
6679 0, pdi
->lowpc
+ baseaddr
,
6680 cu
->language
, objfile
);
6684 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
6685 mst_file_text, objfile); */
6686 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6687 built_actual_name
!= NULL
,
6688 VAR_DOMAIN
, LOC_BLOCK
,
6689 &objfile
->static_psymbols
,
6690 0, pdi
->lowpc
+ baseaddr
,
6691 cu
->language
, objfile
);
6694 case DW_TAG_constant
:
6696 struct psymbol_allocation_list
*list
;
6698 if (pdi
->is_external
)
6699 list
= &objfile
->global_psymbols
;
6701 list
= &objfile
->static_psymbols
;
6702 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6703 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
6704 list
, 0, 0, cu
->language
, objfile
);
6707 case DW_TAG_variable
:
6709 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
6713 && !dwarf2_per_objfile
->has_section_at_zero
)
6715 /* A global or static variable may also have been stripped
6716 out by the linker if unused, in which case its address
6717 will be nullified; do not add such variables into partial
6718 symbol table then. */
6720 else if (pdi
->is_external
)
6723 Don't enter into the minimal symbol tables as there is
6724 a minimal symbol table entry from the ELF symbols already.
6725 Enter into partial symbol table if it has a location
6726 descriptor or a type.
6727 If the location descriptor is missing, new_symbol will create
6728 a LOC_UNRESOLVED symbol, the address of the variable will then
6729 be determined from the minimal symbol table whenever the variable
6731 The address for the partial symbol table entry is not
6732 used by GDB, but it comes in handy for debugging partial symbol
6735 if (pdi
->d
.locdesc
|| pdi
->has_type
)
6736 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6737 built_actual_name
!= NULL
,
6738 VAR_DOMAIN
, LOC_STATIC
,
6739 &objfile
->global_psymbols
,
6741 cu
->language
, objfile
);
6745 /* Static Variable. Skip symbols without location descriptors. */
6746 if (pdi
->d
.locdesc
== NULL
)
6748 xfree (built_actual_name
);
6751 /* prim_record_minimal_symbol (actual_name, addr + baseaddr,
6752 mst_file_data, objfile); */
6753 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6754 built_actual_name
!= NULL
,
6755 VAR_DOMAIN
, LOC_STATIC
,
6756 &objfile
->static_psymbols
,
6758 cu
->language
, objfile
);
6761 case DW_TAG_typedef
:
6762 case DW_TAG_base_type
:
6763 case DW_TAG_subrange_type
:
6764 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6765 built_actual_name
!= NULL
,
6766 VAR_DOMAIN
, LOC_TYPEDEF
,
6767 &objfile
->static_psymbols
,
6768 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6770 case DW_TAG_imported_declaration
:
6771 case DW_TAG_namespace
:
6772 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6773 built_actual_name
!= NULL
,
6774 VAR_DOMAIN
, LOC_TYPEDEF
,
6775 &objfile
->global_psymbols
,
6776 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6779 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6780 built_actual_name
!= NULL
,
6781 MODULE_DOMAIN
, LOC_TYPEDEF
,
6782 &objfile
->global_psymbols
,
6783 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6785 case DW_TAG_class_type
:
6786 case DW_TAG_interface_type
:
6787 case DW_TAG_structure_type
:
6788 case DW_TAG_union_type
:
6789 case DW_TAG_enumeration_type
:
6790 /* Skip external references. The DWARF standard says in the section
6791 about "Structure, Union, and Class Type Entries": "An incomplete
6792 structure, union or class type is represented by a structure,
6793 union or class entry that does not have a byte size attribute
6794 and that has a DW_AT_declaration attribute." */
6795 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
6797 xfree (built_actual_name
);
6801 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
6802 static vs. global. */
6803 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6804 built_actual_name
!= NULL
,
6805 STRUCT_DOMAIN
, LOC_TYPEDEF
,
6806 (cu
->language
== language_cplus
6807 || cu
->language
== language_java
)
6808 ? &objfile
->global_psymbols
6809 : &objfile
->static_psymbols
,
6810 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6813 case DW_TAG_enumerator
:
6814 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6815 built_actual_name
!= NULL
,
6816 VAR_DOMAIN
, LOC_CONST
,
6817 (cu
->language
== language_cplus
6818 || cu
->language
== language_java
)
6819 ? &objfile
->global_psymbols
6820 : &objfile
->static_psymbols
,
6821 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6827 xfree (built_actual_name
);
6830 /* Read a partial die corresponding to a namespace; also, add a symbol
6831 corresponding to that namespace to the symbol table. NAMESPACE is
6832 the name of the enclosing namespace. */
6835 add_partial_namespace (struct partial_die_info
*pdi
,
6836 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
6837 int need_pc
, struct dwarf2_cu
*cu
)
6839 /* Add a symbol for the namespace. */
6841 add_partial_symbol (pdi
, cu
);
6843 /* Now scan partial symbols in that namespace. */
6845 if (pdi
->has_children
)
6846 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
6849 /* Read a partial die corresponding to a Fortran module. */
6852 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
6853 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
6855 /* Add a symbol for the namespace. */
6857 add_partial_symbol (pdi
, cu
);
6859 /* Now scan partial symbols in that module. */
6861 if (pdi
->has_children
)
6862 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
6865 /* Read a partial die corresponding to a subprogram and create a partial
6866 symbol for that subprogram. When the CU language allows it, this
6867 routine also defines a partial symbol for each nested subprogram
6868 that this subprogram contains.
6870 DIE my also be a lexical block, in which case we simply search
6871 recursively for suprograms defined inside that lexical block.
6872 Again, this is only performed when the CU language allows this
6873 type of definitions. */
6876 add_partial_subprogram (struct partial_die_info
*pdi
,
6877 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
6878 int need_pc
, struct dwarf2_cu
*cu
)
6880 if (pdi
->tag
== DW_TAG_subprogram
)
6882 if (pdi
->has_pc_info
)
6884 if (pdi
->lowpc
< *lowpc
)
6885 *lowpc
= pdi
->lowpc
;
6886 if (pdi
->highpc
> *highpc
)
6887 *highpc
= pdi
->highpc
;
6891 struct objfile
*objfile
= cu
->objfile
;
6893 baseaddr
= ANOFFSET (objfile
->section_offsets
,
6894 SECT_OFF_TEXT (objfile
));
6895 addrmap_set_empty (objfile
->psymtabs_addrmap
,
6896 pdi
->lowpc
+ baseaddr
,
6897 pdi
->highpc
- 1 + baseaddr
,
6898 cu
->per_cu
->v
.psymtab
);
6902 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
6904 if (!pdi
->is_declaration
)
6905 /* Ignore subprogram DIEs that do not have a name, they are
6906 illegal. Do not emit a complaint at this point, we will
6907 do so when we convert this psymtab into a symtab. */
6909 add_partial_symbol (pdi
, cu
);
6913 if (! pdi
->has_children
)
6916 if (cu
->language
== language_ada
)
6918 pdi
= pdi
->die_child
;
6921 fixup_partial_die (pdi
, cu
);
6922 if (pdi
->tag
== DW_TAG_subprogram
6923 || pdi
->tag
== DW_TAG_lexical_block
)
6924 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
6925 pdi
= pdi
->die_sibling
;
6930 /* Read a partial die corresponding to an enumeration type. */
6933 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
6934 struct dwarf2_cu
*cu
)
6936 struct partial_die_info
*pdi
;
6938 if (enum_pdi
->name
!= NULL
)
6939 add_partial_symbol (enum_pdi
, cu
);
6941 pdi
= enum_pdi
->die_child
;
6944 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
6945 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
6947 add_partial_symbol (pdi
, cu
);
6948 pdi
= pdi
->die_sibling
;
6952 /* Return the initial uleb128 in the die at INFO_PTR. */
6955 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
6957 unsigned int bytes_read
;
6959 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6962 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
6963 Return the corresponding abbrev, or NULL if the number is zero (indicating
6964 an empty DIE). In either case *BYTES_READ will be set to the length of
6965 the initial number. */
6967 static struct abbrev_info
*
6968 peek_die_abbrev (const gdb_byte
*info_ptr
, unsigned int *bytes_read
,
6969 struct dwarf2_cu
*cu
)
6971 bfd
*abfd
= cu
->objfile
->obfd
;
6972 unsigned int abbrev_number
;
6973 struct abbrev_info
*abbrev
;
6975 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
6977 if (abbrev_number
== 0)
6980 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
6983 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"),
6984 abbrev_number
, bfd_get_filename (abfd
));
6990 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
6991 Returns a pointer to the end of a series of DIEs, terminated by an empty
6992 DIE. Any children of the skipped DIEs will also be skipped. */
6994 static const gdb_byte
*
6995 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
6997 struct dwarf2_cu
*cu
= reader
->cu
;
6998 struct abbrev_info
*abbrev
;
6999 unsigned int bytes_read
;
7003 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
7005 return info_ptr
+ bytes_read
;
7007 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
7011 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7012 INFO_PTR should point just after the initial uleb128 of a DIE, and the
7013 abbrev corresponding to that skipped uleb128 should be passed in
7014 ABBREV. Returns a pointer to this DIE's sibling, skipping any
7017 static const gdb_byte
*
7018 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
7019 struct abbrev_info
*abbrev
)
7021 unsigned int bytes_read
;
7022 struct attribute attr
;
7023 bfd
*abfd
= reader
->abfd
;
7024 struct dwarf2_cu
*cu
= reader
->cu
;
7025 const gdb_byte
*buffer
= reader
->buffer
;
7026 const gdb_byte
*buffer_end
= reader
->buffer_end
;
7027 const gdb_byte
*start_info_ptr
= info_ptr
;
7028 unsigned int form
, i
;
7030 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
7032 /* The only abbrev we care about is DW_AT_sibling. */
7033 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
7035 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
7036 if (attr
.form
== DW_FORM_ref_addr
)
7037 complaint (&symfile_complaints
,
7038 _("ignoring absolute DW_AT_sibling"));
7041 unsigned int off
= dwarf2_get_ref_die_offset (&attr
).sect_off
;
7042 const gdb_byte
*sibling_ptr
= buffer
+ off
;
7044 if (sibling_ptr
< info_ptr
)
7045 complaint (&symfile_complaints
,
7046 _("DW_AT_sibling points backwards"));
7047 else if (sibling_ptr
> reader
->buffer_end
)
7048 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
7054 /* If it isn't DW_AT_sibling, skip this attribute. */
7055 form
= abbrev
->attrs
[i
].form
;
7059 case DW_FORM_ref_addr
:
7060 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
7061 and later it is offset sized. */
7062 if (cu
->header
.version
== 2)
7063 info_ptr
+= cu
->header
.addr_size
;
7065 info_ptr
+= cu
->header
.offset_size
;
7067 case DW_FORM_GNU_ref_alt
:
7068 info_ptr
+= cu
->header
.offset_size
;
7071 info_ptr
+= cu
->header
.addr_size
;
7078 case DW_FORM_flag_present
:
7090 case DW_FORM_ref_sig8
:
7093 case DW_FORM_string
:
7094 read_direct_string (abfd
, info_ptr
, &bytes_read
);
7095 info_ptr
+= bytes_read
;
7097 case DW_FORM_sec_offset
:
7099 case DW_FORM_GNU_strp_alt
:
7100 info_ptr
+= cu
->header
.offset_size
;
7102 case DW_FORM_exprloc
:
7104 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7105 info_ptr
+= bytes_read
;
7107 case DW_FORM_block1
:
7108 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
7110 case DW_FORM_block2
:
7111 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
7113 case DW_FORM_block4
:
7114 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
7118 case DW_FORM_ref_udata
:
7119 case DW_FORM_GNU_addr_index
:
7120 case DW_FORM_GNU_str_index
:
7121 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
7123 case DW_FORM_indirect
:
7124 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7125 info_ptr
+= bytes_read
;
7126 /* We need to continue parsing from here, so just go back to
7128 goto skip_attribute
;
7131 error (_("Dwarf Error: Cannot handle %s "
7132 "in DWARF reader [in module %s]"),
7133 dwarf_form_name (form
),
7134 bfd_get_filename (abfd
));
7138 if (abbrev
->has_children
)
7139 return skip_children (reader
, info_ptr
);
7144 /* Locate ORIG_PDI's sibling.
7145 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
7147 static const gdb_byte
*
7148 locate_pdi_sibling (const struct die_reader_specs
*reader
,
7149 struct partial_die_info
*orig_pdi
,
7150 const gdb_byte
*info_ptr
)
7152 /* Do we know the sibling already? */
7154 if (orig_pdi
->sibling
)
7155 return orig_pdi
->sibling
;
7157 /* Are there any children to deal with? */
7159 if (!orig_pdi
->has_children
)
7162 /* Skip the children the long way. */
7164 return skip_children (reader
, info_ptr
);
7167 /* Expand this partial symbol table into a full symbol table. SELF is
7171 dwarf2_read_symtab (struct partial_symtab
*self
,
7172 struct objfile
*objfile
)
7176 warning (_("bug: psymtab for %s is already read in."),
7183 printf_filtered (_("Reading in symbols for %s..."),
7185 gdb_flush (gdb_stdout
);
7188 /* Restore our global data. */
7189 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
7191 /* If this psymtab is constructed from a debug-only objfile, the
7192 has_section_at_zero flag will not necessarily be correct. We
7193 can get the correct value for this flag by looking at the data
7194 associated with the (presumably stripped) associated objfile. */
7195 if (objfile
->separate_debug_objfile_backlink
)
7197 struct dwarf2_per_objfile
*dpo_backlink
7198 = objfile_data (objfile
->separate_debug_objfile_backlink
,
7199 dwarf2_objfile_data_key
);
7201 dwarf2_per_objfile
->has_section_at_zero
7202 = dpo_backlink
->has_section_at_zero
;
7205 dwarf2_per_objfile
->reading_partial_symbols
= 0;
7207 psymtab_to_symtab_1 (self
);
7209 /* Finish up the debug error message. */
7211 printf_filtered (_("done.\n"));
7214 process_cu_includes ();
7217 /* Reading in full CUs. */
7219 /* Add PER_CU to the queue. */
7222 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
7223 enum language pretend_language
)
7225 struct dwarf2_queue_item
*item
;
7228 item
= xmalloc (sizeof (*item
));
7229 item
->per_cu
= per_cu
;
7230 item
->pretend_language
= pretend_language
;
7233 if (dwarf2_queue
== NULL
)
7234 dwarf2_queue
= item
;
7236 dwarf2_queue_tail
->next
= item
;
7238 dwarf2_queue_tail
= item
;
7241 /* If PER_CU is not yet queued, add it to the queue.
7242 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
7244 The result is non-zero if PER_CU was queued, otherwise the result is zero
7245 meaning either PER_CU is already queued or it is already loaded.
7247 N.B. There is an invariant here that if a CU is queued then it is loaded.
7248 The caller is required to load PER_CU if we return non-zero. */
7251 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
7252 struct dwarf2_per_cu_data
*per_cu
,
7253 enum language pretend_language
)
7255 /* We may arrive here during partial symbol reading, if we need full
7256 DIEs to process an unusual case (e.g. template arguments). Do
7257 not queue PER_CU, just tell our caller to load its DIEs. */
7258 if (dwarf2_per_objfile
->reading_partial_symbols
)
7260 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
7265 /* Mark the dependence relation so that we don't flush PER_CU
7267 if (dependent_cu
!= NULL
)
7268 dwarf2_add_dependence (dependent_cu
, per_cu
);
7270 /* If it's already on the queue, we have nothing to do. */
7274 /* If the compilation unit is already loaded, just mark it as
7276 if (per_cu
->cu
!= NULL
)
7278 per_cu
->cu
->last_used
= 0;
7282 /* Add it to the queue. */
7283 queue_comp_unit (per_cu
, pretend_language
);
7288 /* Process the queue. */
7291 process_queue (void)
7293 struct dwarf2_queue_item
*item
, *next_item
;
7295 if (dwarf2_read_debug
)
7297 fprintf_unfiltered (gdb_stdlog
,
7298 "Expanding one or more symtabs of objfile %s ...\n",
7299 objfile_name (dwarf2_per_objfile
->objfile
));
7302 /* The queue starts out with one item, but following a DIE reference
7303 may load a new CU, adding it to the end of the queue. */
7304 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
7306 if (dwarf2_per_objfile
->using_index
7307 ? !item
->per_cu
->v
.quick
->symtab
7308 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
7310 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
7311 unsigned int debug_print_threshold
;
7314 if (per_cu
->is_debug_types
)
7316 struct signatured_type
*sig_type
=
7317 (struct signatured_type
*) per_cu
;
7319 sprintf (buf
, "TU %s at offset 0x%x",
7320 hex_string (sig_type
->signature
),
7321 per_cu
->offset
.sect_off
);
7322 /* There can be 100s of TUs.
7323 Only print them in verbose mode. */
7324 debug_print_threshold
= 2;
7328 sprintf (buf
, "CU at offset 0x%x", per_cu
->offset
.sect_off
);
7329 debug_print_threshold
= 1;
7332 if (dwarf2_read_debug
>= debug_print_threshold
)
7333 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
7335 if (per_cu
->is_debug_types
)
7336 process_full_type_unit (per_cu
, item
->pretend_language
);
7338 process_full_comp_unit (per_cu
, item
->pretend_language
);
7340 if (dwarf2_read_debug
>= debug_print_threshold
)
7341 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
7344 item
->per_cu
->queued
= 0;
7345 next_item
= item
->next
;
7349 dwarf2_queue_tail
= NULL
;
7351 if (dwarf2_read_debug
)
7353 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
7354 objfile_name (dwarf2_per_objfile
->objfile
));
7358 /* Free all allocated queue entries. This function only releases anything if
7359 an error was thrown; if the queue was processed then it would have been
7360 freed as we went along. */
7363 dwarf2_release_queue (void *dummy
)
7365 struct dwarf2_queue_item
*item
, *last
;
7367 item
= dwarf2_queue
;
7370 /* Anything still marked queued is likely to be in an
7371 inconsistent state, so discard it. */
7372 if (item
->per_cu
->queued
)
7374 if (item
->per_cu
->cu
!= NULL
)
7375 free_one_cached_comp_unit (item
->per_cu
);
7376 item
->per_cu
->queued
= 0;
7384 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
7387 /* Read in full symbols for PST, and anything it depends on. */
7390 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
7392 struct dwarf2_per_cu_data
*per_cu
;
7398 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
7399 if (!pst
->dependencies
[i
]->readin
7400 && pst
->dependencies
[i
]->user
== NULL
)
7402 /* Inform about additional files that need to be read in. */
7405 /* FIXME: i18n: Need to make this a single string. */
7406 fputs_filtered (" ", gdb_stdout
);
7408 fputs_filtered ("and ", gdb_stdout
);
7410 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
7411 wrap_here (""); /* Flush output. */
7412 gdb_flush (gdb_stdout
);
7414 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
7417 per_cu
= pst
->read_symtab_private
;
7421 /* It's an include file, no symbols to read for it.
7422 Everything is in the parent symtab. */
7427 dw2_do_instantiate_symtab (per_cu
);
7430 /* Trivial hash function for die_info: the hash value of a DIE
7431 is its offset in .debug_info for this objfile. */
7434 die_hash (const void *item
)
7436 const struct die_info
*die
= item
;
7438 return die
->offset
.sect_off
;
7441 /* Trivial comparison function for die_info structures: two DIEs
7442 are equal if they have the same offset. */
7445 die_eq (const void *item_lhs
, const void *item_rhs
)
7447 const struct die_info
*die_lhs
= item_lhs
;
7448 const struct die_info
*die_rhs
= item_rhs
;
7450 return die_lhs
->offset
.sect_off
== die_rhs
->offset
.sect_off
;
7453 /* die_reader_func for load_full_comp_unit.
7454 This is identical to read_signatured_type_reader,
7455 but is kept separate for now. */
7458 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
7459 const gdb_byte
*info_ptr
,
7460 struct die_info
*comp_unit_die
,
7464 struct dwarf2_cu
*cu
= reader
->cu
;
7465 enum language
*language_ptr
= data
;
7467 gdb_assert (cu
->die_hash
== NULL
);
7469 htab_create_alloc_ex (cu
->header
.length
/ 12,
7473 &cu
->comp_unit_obstack
,
7474 hashtab_obstack_allocate
,
7475 dummy_obstack_deallocate
);
7478 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
7479 &info_ptr
, comp_unit_die
);
7480 cu
->dies
= comp_unit_die
;
7481 /* comp_unit_die is not stored in die_hash, no need. */
7483 /* We try not to read any attributes in this function, because not
7484 all CUs needed for references have been loaded yet, and symbol
7485 table processing isn't initialized. But we have to set the CU language,
7486 or we won't be able to build types correctly.
7487 Similarly, if we do not read the producer, we can not apply
7488 producer-specific interpretation. */
7489 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
7492 /* Load the DIEs associated with PER_CU into memory. */
7495 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
7496 enum language pretend_language
)
7498 gdb_assert (! this_cu
->is_debug_types
);
7500 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
7501 load_full_comp_unit_reader
, &pretend_language
);
7504 /* Add a DIE to the delayed physname list. */
7507 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
7508 const char *name
, struct die_info
*die
,
7509 struct dwarf2_cu
*cu
)
7511 struct delayed_method_info mi
;
7513 mi
.fnfield_index
= fnfield_index
;
7517 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
7520 /* A cleanup for freeing the delayed method list. */
7523 free_delayed_list (void *ptr
)
7525 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
7526 if (cu
->method_list
!= NULL
)
7528 VEC_free (delayed_method_info
, cu
->method_list
);
7529 cu
->method_list
= NULL
;
7533 /* Compute the physnames of any methods on the CU's method list.
7535 The computation of method physnames is delayed in order to avoid the
7536 (bad) condition that one of the method's formal parameters is of an as yet
7540 compute_delayed_physnames (struct dwarf2_cu
*cu
)
7543 struct delayed_method_info
*mi
;
7544 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
7546 const char *physname
;
7547 struct fn_fieldlist
*fn_flp
7548 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
7549 physname
= dwarf2_physname (mi
->name
, mi
->die
, cu
);
7550 fn_flp
->fn_fields
[mi
->index
].physname
= physname
? physname
: "";
7554 /* Go objects should be embedded in a DW_TAG_module DIE,
7555 and it's not clear if/how imported objects will appear.
7556 To keep Go support simple until that's worked out,
7557 go back through what we've read and create something usable.
7558 We could do this while processing each DIE, and feels kinda cleaner,
7559 but that way is more invasive.
7560 This is to, for example, allow the user to type "p var" or "b main"
7561 without having to specify the package name, and allow lookups
7562 of module.object to work in contexts that use the expression
7566 fixup_go_packaging (struct dwarf2_cu
*cu
)
7568 char *package_name
= NULL
;
7569 struct pending
*list
;
7572 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
7574 for (i
= 0; i
< list
->nsyms
; ++i
)
7576 struct symbol
*sym
= list
->symbol
[i
];
7578 if (SYMBOL_LANGUAGE (sym
) == language_go
7579 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
7581 char *this_package_name
= go_symbol_package_name (sym
);
7583 if (this_package_name
== NULL
)
7585 if (package_name
== NULL
)
7586 package_name
= this_package_name
;
7589 if (strcmp (package_name
, this_package_name
) != 0)
7590 complaint (&symfile_complaints
,
7591 _("Symtab %s has objects from two different Go packages: %s and %s"),
7592 (SYMBOL_SYMTAB (sym
)
7593 ? symtab_to_filename_for_display (SYMBOL_SYMTAB (sym
))
7594 : objfile_name (cu
->objfile
)),
7595 this_package_name
, package_name
);
7596 xfree (this_package_name
);
7602 if (package_name
!= NULL
)
7604 struct objfile
*objfile
= cu
->objfile
;
7605 const char *saved_package_name
= obstack_copy0 (&objfile
->objfile_obstack
,
7607 strlen (package_name
));
7608 struct type
*type
= init_type (TYPE_CODE_MODULE
, 0, 0,
7609 saved_package_name
, objfile
);
7612 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
7614 sym
= allocate_symbol (objfile
);
7615 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
7616 SYMBOL_SET_NAMES (sym
, saved_package_name
,
7617 strlen (saved_package_name
), 0, objfile
);
7618 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
7619 e.g., "main" finds the "main" module and not C's main(). */
7620 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
7621 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
7622 SYMBOL_TYPE (sym
) = type
;
7624 add_symbol_to_list (sym
, &global_symbols
);
7626 xfree (package_name
);
7630 /* Return the symtab for PER_CU. This works properly regardless of
7631 whether we're using the index or psymtabs. */
7633 static struct symtab
*
7634 get_symtab (struct dwarf2_per_cu_data
*per_cu
)
7636 return (dwarf2_per_objfile
->using_index
7637 ? per_cu
->v
.quick
->symtab
7638 : per_cu
->v
.psymtab
->symtab
);
7641 /* A helper function for computing the list of all symbol tables
7642 included by PER_CU. */
7645 recursively_compute_inclusions (VEC (symtab_ptr
) **result
,
7646 htab_t all_children
, htab_t all_type_symtabs
,
7647 struct dwarf2_per_cu_data
*per_cu
,
7648 struct symtab
*immediate_parent
)
7652 struct symtab
*symtab
;
7653 struct dwarf2_per_cu_data
*iter
;
7655 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
7658 /* This inclusion and its children have been processed. */
7663 /* Only add a CU if it has a symbol table. */
7664 symtab
= get_symtab (per_cu
);
7667 /* If this is a type unit only add its symbol table if we haven't
7668 seen it yet (type unit per_cu's can share symtabs). */
7669 if (per_cu
->is_debug_types
)
7671 slot
= htab_find_slot (all_type_symtabs
, symtab
, INSERT
);
7675 VEC_safe_push (symtab_ptr
, *result
, symtab
);
7676 if (symtab
->user
== NULL
)
7677 symtab
->user
= immediate_parent
;
7682 VEC_safe_push (symtab_ptr
, *result
, symtab
);
7683 if (symtab
->user
== NULL
)
7684 symtab
->user
= immediate_parent
;
7689 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
7692 recursively_compute_inclusions (result
, all_children
,
7693 all_type_symtabs
, iter
, symtab
);
7697 /* Compute the symtab 'includes' fields for the symtab related to
7701 compute_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
7703 gdb_assert (! per_cu
->is_debug_types
);
7705 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
7708 struct dwarf2_per_cu_data
*per_cu_iter
;
7709 struct symtab
*symtab_iter
;
7710 VEC (symtab_ptr
) *result_symtabs
= NULL
;
7711 htab_t all_children
, all_type_symtabs
;
7712 struct symtab
*symtab
= get_symtab (per_cu
);
7714 /* If we don't have a symtab, we can just skip this case. */
7718 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
7719 NULL
, xcalloc
, xfree
);
7720 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
7721 NULL
, xcalloc
, xfree
);
7724 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
7728 recursively_compute_inclusions (&result_symtabs
, all_children
,
7729 all_type_symtabs
, per_cu_iter
,
7733 /* Now we have a transitive closure of all the included symtabs. */
7734 len
= VEC_length (symtab_ptr
, result_symtabs
);
7736 = obstack_alloc (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
7737 (len
+ 1) * sizeof (struct symtab
*));
7739 VEC_iterate (symtab_ptr
, result_symtabs
, ix
, symtab_iter
);
7741 symtab
->includes
[ix
] = symtab_iter
;
7742 symtab
->includes
[len
] = NULL
;
7744 VEC_free (symtab_ptr
, result_symtabs
);
7745 htab_delete (all_children
);
7746 htab_delete (all_type_symtabs
);
7750 /* Compute the 'includes' field for the symtabs of all the CUs we just
7754 process_cu_includes (void)
7757 struct dwarf2_per_cu_data
*iter
;
7760 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
7764 if (! iter
->is_debug_types
)
7765 compute_symtab_includes (iter
);
7768 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
7771 /* Generate full symbol information for PER_CU, whose DIEs have
7772 already been loaded into memory. */
7775 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
7776 enum language pretend_language
)
7778 struct dwarf2_cu
*cu
= per_cu
->cu
;
7779 struct objfile
*objfile
= per_cu
->objfile
;
7780 CORE_ADDR lowpc
, highpc
;
7781 struct symtab
*symtab
;
7782 struct cleanup
*back_to
, *delayed_list_cleanup
;
7784 struct block
*static_block
;
7786 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7789 back_to
= make_cleanup (really_free_pendings
, NULL
);
7790 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
7792 cu
->list_in_scope
= &file_symbols
;
7794 cu
->language
= pretend_language
;
7795 cu
->language_defn
= language_def (cu
->language
);
7797 /* Do line number decoding in read_file_scope () */
7798 process_die (cu
->dies
, cu
);
7800 /* For now fudge the Go package. */
7801 if (cu
->language
== language_go
)
7802 fixup_go_packaging (cu
);
7804 /* Now that we have processed all the DIEs in the CU, all the types
7805 should be complete, and it should now be safe to compute all of the
7807 compute_delayed_physnames (cu
);
7808 do_cleanups (delayed_list_cleanup
);
7810 /* Some compilers don't define a DW_AT_high_pc attribute for the
7811 compilation unit. If the DW_AT_high_pc is missing, synthesize
7812 it, by scanning the DIE's below the compilation unit. */
7813 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
7816 = end_symtab_get_static_block (highpc
+ baseaddr
, objfile
, 0, 1);
7818 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
7819 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
7820 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
7821 addrmap to help ensure it has an accurate map of pc values belonging to
7823 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
7825 symtab
= end_symtab_from_static_block (static_block
, objfile
,
7826 SECT_OFF_TEXT (objfile
), 0);
7830 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
7832 /* Set symtab language to language from DW_AT_language. If the
7833 compilation is from a C file generated by language preprocessors, do
7834 not set the language if it was already deduced by start_subfile. */
7835 if (!(cu
->language
== language_c
&& symtab
->language
!= language_c
))
7836 symtab
->language
= cu
->language
;
7838 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
7839 produce DW_AT_location with location lists but it can be possibly
7840 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
7841 there were bugs in prologue debug info, fixed later in GCC-4.5
7842 by "unwind info for epilogues" patch (which is not directly related).
7844 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
7845 needed, it would be wrong due to missing DW_AT_producer there.
7847 Still one can confuse GDB by using non-standard GCC compilation
7848 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
7850 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
7851 symtab
->locations_valid
= 1;
7853 if (gcc_4_minor
>= 5)
7854 symtab
->epilogue_unwind_valid
= 1;
7856 symtab
->call_site_htab
= cu
->call_site_htab
;
7859 if (dwarf2_per_objfile
->using_index
)
7860 per_cu
->v
.quick
->symtab
= symtab
;
7863 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
7864 pst
->symtab
= symtab
;
7868 /* Push it for inclusion processing later. */
7869 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
7871 do_cleanups (back_to
);
7874 /* Generate full symbol information for type unit PER_CU, whose DIEs have
7875 already been loaded into memory. */
7878 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
7879 enum language pretend_language
)
7881 struct dwarf2_cu
*cu
= per_cu
->cu
;
7882 struct objfile
*objfile
= per_cu
->objfile
;
7883 struct symtab
*symtab
;
7884 struct cleanup
*back_to
, *delayed_list_cleanup
;
7885 struct signatured_type
*sig_type
;
7887 gdb_assert (per_cu
->is_debug_types
);
7888 sig_type
= (struct signatured_type
*) per_cu
;
7891 back_to
= make_cleanup (really_free_pendings
, NULL
);
7892 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
7894 cu
->list_in_scope
= &file_symbols
;
7896 cu
->language
= pretend_language
;
7897 cu
->language_defn
= language_def (cu
->language
);
7899 /* The symbol tables are set up in read_type_unit_scope. */
7900 process_die (cu
->dies
, cu
);
7902 /* For now fudge the Go package. */
7903 if (cu
->language
== language_go
)
7904 fixup_go_packaging (cu
);
7906 /* Now that we have processed all the DIEs in the CU, all the types
7907 should be complete, and it should now be safe to compute all of the
7909 compute_delayed_physnames (cu
);
7910 do_cleanups (delayed_list_cleanup
);
7912 /* TUs share symbol tables.
7913 If this is the first TU to use this symtab, complete the construction
7914 of it with end_expandable_symtab. Otherwise, complete the addition of
7915 this TU's symbols to the existing symtab. */
7916 if (sig_type
->type_unit_group
->primary_symtab
== NULL
)
7918 symtab
= end_expandable_symtab (0, objfile
, SECT_OFF_TEXT (objfile
));
7919 sig_type
->type_unit_group
->primary_symtab
= symtab
;
7923 /* Set symtab language to language from DW_AT_language. If the
7924 compilation is from a C file generated by language preprocessors,
7925 do not set the language if it was already deduced by
7927 if (!(cu
->language
== language_c
&& symtab
->language
!= language_c
))
7928 symtab
->language
= cu
->language
;
7933 augment_type_symtab (objfile
,
7934 sig_type
->type_unit_group
->primary_symtab
);
7935 symtab
= sig_type
->type_unit_group
->primary_symtab
;
7938 if (dwarf2_per_objfile
->using_index
)
7939 per_cu
->v
.quick
->symtab
= symtab
;
7942 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
7943 pst
->symtab
= symtab
;
7947 do_cleanups (back_to
);
7950 /* Process an imported unit DIE. */
7953 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
7955 struct attribute
*attr
;
7957 /* For now we don't handle imported units in type units. */
7958 if (cu
->per_cu
->is_debug_types
)
7960 error (_("Dwarf Error: DW_TAG_imported_unit is not"
7961 " supported in type units [in module %s]"),
7962 objfile_name (cu
->objfile
));
7965 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
7968 struct dwarf2_per_cu_data
*per_cu
;
7969 struct symtab
*imported_symtab
;
7973 offset
= dwarf2_get_ref_die_offset (attr
);
7974 is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
7975 per_cu
= dwarf2_find_containing_comp_unit (offset
, is_dwz
, cu
->objfile
);
7977 /* If necessary, add it to the queue and load its DIEs. */
7978 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
7979 load_full_comp_unit (per_cu
, cu
->language
);
7981 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
7986 /* Reset the in_process bit of a die. */
7989 reset_die_in_process (void *arg
)
7991 struct die_info
*die
= arg
;
7993 die
->in_process
= 0;
7996 /* Process a die and its children. */
7999 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8001 struct cleanup
*in_process
;
8003 /* We should only be processing those not already in process. */
8004 gdb_assert (!die
->in_process
);
8006 die
->in_process
= 1;
8007 in_process
= make_cleanup (reset_die_in_process
,die
);
8011 case DW_TAG_padding
:
8013 case DW_TAG_compile_unit
:
8014 case DW_TAG_partial_unit
:
8015 read_file_scope (die
, cu
);
8017 case DW_TAG_type_unit
:
8018 read_type_unit_scope (die
, cu
);
8020 case DW_TAG_subprogram
:
8021 case DW_TAG_inlined_subroutine
:
8022 read_func_scope (die
, cu
);
8024 case DW_TAG_lexical_block
:
8025 case DW_TAG_try_block
:
8026 case DW_TAG_catch_block
:
8027 read_lexical_block_scope (die
, cu
);
8029 case DW_TAG_GNU_call_site
:
8030 read_call_site_scope (die
, cu
);
8032 case DW_TAG_class_type
:
8033 case DW_TAG_interface_type
:
8034 case DW_TAG_structure_type
:
8035 case DW_TAG_union_type
:
8036 process_structure_scope (die
, cu
);
8038 case DW_TAG_enumeration_type
:
8039 process_enumeration_scope (die
, cu
);
8042 /* These dies have a type, but processing them does not create
8043 a symbol or recurse to process the children. Therefore we can
8044 read them on-demand through read_type_die. */
8045 case DW_TAG_subroutine_type
:
8046 case DW_TAG_set_type
:
8047 case DW_TAG_array_type
:
8048 case DW_TAG_pointer_type
:
8049 case DW_TAG_ptr_to_member_type
:
8050 case DW_TAG_reference_type
:
8051 case DW_TAG_string_type
:
8054 case DW_TAG_base_type
:
8055 case DW_TAG_subrange_type
:
8056 case DW_TAG_typedef
:
8057 /* Add a typedef symbol for the type definition, if it has a
8059 new_symbol (die
, read_type_die (die
, cu
), cu
);
8061 case DW_TAG_common_block
:
8062 read_common_block (die
, cu
);
8064 case DW_TAG_common_inclusion
:
8066 case DW_TAG_namespace
:
8067 cu
->processing_has_namespace_info
= 1;
8068 read_namespace (die
, cu
);
8071 cu
->processing_has_namespace_info
= 1;
8072 read_module (die
, cu
);
8074 case DW_TAG_imported_declaration
:
8075 cu
->processing_has_namespace_info
= 1;
8076 if (read_namespace_alias (die
, cu
))
8078 /* The declaration is not a global namespace alias: fall through. */
8079 case DW_TAG_imported_module
:
8080 cu
->processing_has_namespace_info
= 1;
8081 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
8082 || cu
->language
!= language_fortran
))
8083 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
8084 dwarf_tag_name (die
->tag
));
8085 read_import_statement (die
, cu
);
8088 case DW_TAG_imported_unit
:
8089 process_imported_unit_die (die
, cu
);
8093 new_symbol (die
, NULL
, cu
);
8097 do_cleanups (in_process
);
8100 /* DWARF name computation. */
8102 /* A helper function for dwarf2_compute_name which determines whether DIE
8103 needs to have the name of the scope prepended to the name listed in the
8107 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
8109 struct attribute
*attr
;
8113 case DW_TAG_namespace
:
8114 case DW_TAG_typedef
:
8115 case DW_TAG_class_type
:
8116 case DW_TAG_interface_type
:
8117 case DW_TAG_structure_type
:
8118 case DW_TAG_union_type
:
8119 case DW_TAG_enumeration_type
:
8120 case DW_TAG_enumerator
:
8121 case DW_TAG_subprogram
:
8123 case DW_TAG_imported_declaration
:
8126 case DW_TAG_variable
:
8127 case DW_TAG_constant
:
8128 /* We only need to prefix "globally" visible variables. These include
8129 any variable marked with DW_AT_external or any variable that
8130 lives in a namespace. [Variables in anonymous namespaces
8131 require prefixing, but they are not DW_AT_external.] */
8133 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
8135 struct dwarf2_cu
*spec_cu
= cu
;
8137 return die_needs_namespace (die_specification (die
, &spec_cu
),
8141 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
8142 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
8143 && die
->parent
->tag
!= DW_TAG_module
)
8145 /* A variable in a lexical block of some kind does not need a
8146 namespace, even though in C++ such variables may be external
8147 and have a mangled name. */
8148 if (die
->parent
->tag
== DW_TAG_lexical_block
8149 || die
->parent
->tag
== DW_TAG_try_block
8150 || die
->parent
->tag
== DW_TAG_catch_block
8151 || die
->parent
->tag
== DW_TAG_subprogram
)
8160 /* Retrieve the last character from a mem_file. */
8163 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
8165 char *last_char_p
= (char *) object
;
8168 *last_char_p
= buffer
[length
- 1];
8171 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
8172 compute the physname for the object, which include a method's:
8173 - formal parameters (C++/Java),
8174 - receiver type (Go),
8175 - return type (Java).
8177 The term "physname" is a bit confusing.
8178 For C++, for example, it is the demangled name.
8179 For Go, for example, it's the mangled name.
8181 For Ada, return the DIE's linkage name rather than the fully qualified
8182 name. PHYSNAME is ignored..
8184 The result is allocated on the objfile_obstack and canonicalized. */
8187 dwarf2_compute_name (const char *name
,
8188 struct die_info
*die
, struct dwarf2_cu
*cu
,
8191 struct objfile
*objfile
= cu
->objfile
;
8194 name
= dwarf2_name (die
, cu
);
8196 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
8197 compute it by typename_concat inside GDB. */
8198 if (cu
->language
== language_ada
8199 || (cu
->language
== language_fortran
&& physname
))
8201 /* For Ada unit, we prefer the linkage name over the name, as
8202 the former contains the exported name, which the user expects
8203 to be able to reference. Ideally, we want the user to be able
8204 to reference this entity using either natural or linkage name,
8205 but we haven't started looking at this enhancement yet. */
8206 struct attribute
*attr
;
8208 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
8210 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8211 if (attr
&& DW_STRING (attr
))
8212 return DW_STRING (attr
);
8215 /* These are the only languages we know how to qualify names in. */
8217 && (cu
->language
== language_cplus
|| cu
->language
== language_java
8218 || cu
->language
== language_fortran
))
8220 if (die_needs_namespace (die
, cu
))
8224 struct ui_file
*buf
;
8226 prefix
= determine_prefix (die
, cu
);
8227 buf
= mem_fileopen ();
8228 if (*prefix
!= '\0')
8230 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
8233 fputs_unfiltered (prefixed_name
, buf
);
8234 xfree (prefixed_name
);
8237 fputs_unfiltered (name
, buf
);
8239 /* Template parameters may be specified in the DIE's DW_AT_name, or
8240 as children with DW_TAG_template_type_param or
8241 DW_TAG_value_type_param. If the latter, add them to the name
8242 here. If the name already has template parameters, then
8243 skip this step; some versions of GCC emit both, and
8244 it is more efficient to use the pre-computed name.
8246 Something to keep in mind about this process: it is very
8247 unlikely, or in some cases downright impossible, to produce
8248 something that will match the mangled name of a function.
8249 If the definition of the function has the same debug info,
8250 we should be able to match up with it anyway. But fallbacks
8251 using the minimal symbol, for instance to find a method
8252 implemented in a stripped copy of libstdc++, will not work.
8253 If we do not have debug info for the definition, we will have to
8254 match them up some other way.
8256 When we do name matching there is a related problem with function
8257 templates; two instantiated function templates are allowed to
8258 differ only by their return types, which we do not add here. */
8260 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
8262 struct attribute
*attr
;
8263 struct die_info
*child
;
8266 die
->building_fullname
= 1;
8268 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
8272 const gdb_byte
*bytes
;
8273 struct dwarf2_locexpr_baton
*baton
;
8276 if (child
->tag
!= DW_TAG_template_type_param
8277 && child
->tag
!= DW_TAG_template_value_param
)
8282 fputs_unfiltered ("<", buf
);
8286 fputs_unfiltered (", ", buf
);
8288 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
8291 complaint (&symfile_complaints
,
8292 _("template parameter missing DW_AT_type"));
8293 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
8296 type
= die_type (child
, cu
);
8298 if (child
->tag
== DW_TAG_template_type_param
)
8300 c_print_type (type
, "", buf
, -1, 0, &type_print_raw_options
);
8304 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
8307 complaint (&symfile_complaints
,
8308 _("template parameter missing "
8309 "DW_AT_const_value"));
8310 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
8314 dwarf2_const_value_attr (attr
, type
, name
,
8315 &cu
->comp_unit_obstack
, cu
,
8316 &value
, &bytes
, &baton
);
8318 if (TYPE_NOSIGN (type
))
8319 /* GDB prints characters as NUMBER 'CHAR'. If that's
8320 changed, this can use value_print instead. */
8321 c_printchar (value
, type
, buf
);
8324 struct value_print_options opts
;
8327 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
8331 else if (bytes
!= NULL
)
8333 v
= allocate_value (type
);
8334 memcpy (value_contents_writeable (v
), bytes
,
8335 TYPE_LENGTH (type
));
8338 v
= value_from_longest (type
, value
);
8340 /* Specify decimal so that we do not depend on
8342 get_formatted_print_options (&opts
, 'd');
8344 value_print (v
, buf
, &opts
);
8350 die
->building_fullname
= 0;
8354 /* Close the argument list, with a space if necessary
8355 (nested templates). */
8356 char last_char
= '\0';
8357 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
8358 if (last_char
== '>')
8359 fputs_unfiltered (" >", buf
);
8361 fputs_unfiltered (">", buf
);
8365 /* For Java and C++ methods, append formal parameter type
8366 information, if PHYSNAME. */
8368 if (physname
&& die
->tag
== DW_TAG_subprogram
8369 && (cu
->language
== language_cplus
8370 || cu
->language
== language_java
))
8372 struct type
*type
= read_type_die (die
, cu
);
8374 c_type_print_args (type
, buf
, 1, cu
->language
,
8375 &type_print_raw_options
);
8377 if (cu
->language
== language_java
)
8379 /* For java, we must append the return type to method
8381 if (die
->tag
== DW_TAG_subprogram
)
8382 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
8383 0, 0, &type_print_raw_options
);
8385 else if (cu
->language
== language_cplus
)
8387 /* Assume that an artificial first parameter is
8388 "this", but do not crash if it is not. RealView
8389 marks unnamed (and thus unused) parameters as
8390 artificial; there is no way to differentiate
8392 if (TYPE_NFIELDS (type
) > 0
8393 && TYPE_FIELD_ARTIFICIAL (type
, 0)
8394 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
8395 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
8397 fputs_unfiltered (" const", buf
);
8401 name
= ui_file_obsavestring (buf
, &objfile
->objfile_obstack
,
8403 ui_file_delete (buf
);
8405 if (cu
->language
== language_cplus
)
8408 = dwarf2_canonicalize_name (name
, cu
,
8409 &objfile
->objfile_obstack
);
8420 /* Return the fully qualified name of DIE, based on its DW_AT_name.
8421 If scope qualifiers are appropriate they will be added. The result
8422 will be allocated on the objfile_obstack, or NULL if the DIE does
8423 not have a name. NAME may either be from a previous call to
8424 dwarf2_name or NULL.
8426 The output string will be canonicalized (if C++/Java). */
8429 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
8431 return dwarf2_compute_name (name
, die
, cu
, 0);
8434 /* Construct a physname for the given DIE in CU. NAME may either be
8435 from a previous call to dwarf2_name or NULL. The result will be
8436 allocated on the objfile_objstack or NULL if the DIE does not have a
8439 The output string will be canonicalized (if C++/Java). */
8442 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
8444 struct objfile
*objfile
= cu
->objfile
;
8445 struct attribute
*attr
;
8446 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
8447 struct cleanup
*back_to
;
8450 /* In this case dwarf2_compute_name is just a shortcut not building anything
8452 if (!die_needs_namespace (die
, cu
))
8453 return dwarf2_compute_name (name
, die
, cu
, 1);
8455 back_to
= make_cleanup (null_cleanup
, NULL
);
8457 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
8459 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8461 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
8463 if (attr
&& DW_STRING (attr
))
8467 mangled
= DW_STRING (attr
);
8469 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
8470 type. It is easier for GDB users to search for such functions as
8471 `name(params)' than `long name(params)'. In such case the minimal
8472 symbol names do not match the full symbol names but for template
8473 functions there is never a need to look up their definition from their
8474 declaration so the only disadvantage remains the minimal symbol
8475 variant `long name(params)' does not have the proper inferior type.
8478 if (cu
->language
== language_go
)
8480 /* This is a lie, but we already lie to the caller new_symbol_full.
8481 new_symbol_full assumes we return the mangled name.
8482 This just undoes that lie until things are cleaned up. */
8487 demangled
= gdb_demangle (mangled
,
8488 (DMGL_PARAMS
| DMGL_ANSI
8489 | (cu
->language
== language_java
8490 ? DMGL_JAVA
| DMGL_RET_POSTFIX
8495 make_cleanup (xfree
, demangled
);
8505 if (canon
== NULL
|| check_physname
)
8507 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
8509 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
8511 /* It may not mean a bug in GDB. The compiler could also
8512 compute DW_AT_linkage_name incorrectly. But in such case
8513 GDB would need to be bug-to-bug compatible. */
8515 complaint (&symfile_complaints
,
8516 _("Computed physname <%s> does not match demangled <%s> "
8517 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
8518 physname
, canon
, mangled
, die
->offset
.sect_off
,
8519 objfile_name (objfile
));
8521 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
8522 is available here - over computed PHYSNAME. It is safer
8523 against both buggy GDB and buggy compilers. */
8537 retval
= obstack_copy0 (&objfile
->objfile_obstack
, retval
, strlen (retval
));
8539 do_cleanups (back_to
);
8543 /* Inspect DIE in CU for a namespace alias. If one exists, record
8544 a new symbol for it.
8546 Returns 1 if a namespace alias was recorded, 0 otherwise. */
8549 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
8551 struct attribute
*attr
;
8553 /* If the die does not have a name, this is not a namespace
8555 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
8559 struct die_info
*d
= die
;
8560 struct dwarf2_cu
*imported_cu
= cu
;
8562 /* If the compiler has nested DW_AT_imported_declaration DIEs,
8563 keep inspecting DIEs until we hit the underlying import. */
8564 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
8565 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
8567 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
8571 d
= follow_die_ref (d
, attr
, &imported_cu
);
8572 if (d
->tag
!= DW_TAG_imported_declaration
)
8576 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
8578 complaint (&symfile_complaints
,
8579 _("DIE at 0x%x has too many recursively imported "
8580 "declarations"), d
->offset
.sect_off
);
8587 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
8589 type
= get_die_type_at_offset (offset
, cu
->per_cu
);
8590 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
8592 /* This declaration is a global namespace alias. Add
8593 a symbol for it whose type is the aliased namespace. */
8594 new_symbol (die
, type
, cu
);
8603 /* Read the import statement specified by the given die and record it. */
8606 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
8608 struct objfile
*objfile
= cu
->objfile
;
8609 struct attribute
*import_attr
;
8610 struct die_info
*imported_die
, *child_die
;
8611 struct dwarf2_cu
*imported_cu
;
8612 const char *imported_name
;
8613 const char *imported_name_prefix
;
8614 const char *canonical_name
;
8615 const char *import_alias
;
8616 const char *imported_declaration
= NULL
;
8617 const char *import_prefix
;
8618 VEC (const_char_ptr
) *excludes
= NULL
;
8619 struct cleanup
*cleanups
;
8621 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8622 if (import_attr
== NULL
)
8624 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
8625 dwarf_tag_name (die
->tag
));
8630 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
8631 imported_name
= dwarf2_name (imported_die
, imported_cu
);
8632 if (imported_name
== NULL
)
8634 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
8636 The import in the following code:
8650 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
8651 <52> DW_AT_decl_file : 1
8652 <53> DW_AT_decl_line : 6
8653 <54> DW_AT_import : <0x75>
8654 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
8656 <5b> DW_AT_decl_file : 1
8657 <5c> DW_AT_decl_line : 2
8658 <5d> DW_AT_type : <0x6e>
8660 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
8661 <76> DW_AT_byte_size : 4
8662 <77> DW_AT_encoding : 5 (signed)
8664 imports the wrong die ( 0x75 instead of 0x58 ).
8665 This case will be ignored until the gcc bug is fixed. */
8669 /* Figure out the local name after import. */
8670 import_alias
= dwarf2_name (die
, cu
);
8672 /* Figure out where the statement is being imported to. */
8673 import_prefix
= determine_prefix (die
, cu
);
8675 /* Figure out what the scope of the imported die is and prepend it
8676 to the name of the imported die. */
8677 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
8679 if (imported_die
->tag
!= DW_TAG_namespace
8680 && imported_die
->tag
!= DW_TAG_module
)
8682 imported_declaration
= imported_name
;
8683 canonical_name
= imported_name_prefix
;
8685 else if (strlen (imported_name_prefix
) > 0)
8686 canonical_name
= obconcat (&objfile
->objfile_obstack
,
8687 imported_name_prefix
, "::", imported_name
,
8690 canonical_name
= imported_name
;
8692 cleanups
= make_cleanup (VEC_cleanup (const_char_ptr
), &excludes
);
8694 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
8695 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
8696 child_die
= sibling_die (child_die
))
8698 /* DWARF-4: A Fortran use statement with a “rename list” may be
8699 represented by an imported module entry with an import attribute
8700 referring to the module and owned entries corresponding to those
8701 entities that are renamed as part of being imported. */
8703 if (child_die
->tag
!= DW_TAG_imported_declaration
)
8705 complaint (&symfile_complaints
,
8706 _("child DW_TAG_imported_declaration expected "
8707 "- DIE at 0x%x [in module %s]"),
8708 child_die
->offset
.sect_off
, objfile_name (objfile
));
8712 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
8713 if (import_attr
== NULL
)
8715 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
8716 dwarf_tag_name (child_die
->tag
));
8721 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
8723 imported_name
= dwarf2_name (imported_die
, imported_cu
);
8724 if (imported_name
== NULL
)
8726 complaint (&symfile_complaints
,
8727 _("child DW_TAG_imported_declaration has unknown "
8728 "imported name - DIE at 0x%x [in module %s]"),
8729 child_die
->offset
.sect_off
, objfile_name (objfile
));
8733 VEC_safe_push (const_char_ptr
, excludes
, imported_name
);
8735 process_die (child_die
, cu
);
8738 cp_add_using_directive (import_prefix
,
8741 imported_declaration
,
8744 &objfile
->objfile_obstack
);
8746 do_cleanups (cleanups
);
8749 /* Cleanup function for handle_DW_AT_stmt_list. */
8752 free_cu_line_header (void *arg
)
8754 struct dwarf2_cu
*cu
= arg
;
8756 free_line_header (cu
->line_header
);
8757 cu
->line_header
= NULL
;
8760 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
8761 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
8762 this, it was first present in GCC release 4.3.0. */
8765 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
8767 if (!cu
->checked_producer
)
8768 check_producer (cu
);
8770 return cu
->producer_is_gcc_lt_4_3
;
8774 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
8775 const char **name
, const char **comp_dir
)
8777 struct attribute
*attr
;
8782 /* Find the filename. Do not use dwarf2_name here, since the filename
8783 is not a source language identifier. */
8784 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
8787 *name
= DW_STRING (attr
);
8790 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
8792 *comp_dir
= DW_STRING (attr
);
8793 else if (producer_is_gcc_lt_4_3 (cu
) && *name
!= NULL
8794 && IS_ABSOLUTE_PATH (*name
))
8796 char *d
= ldirname (*name
);
8800 make_cleanup (xfree
, d
);
8802 if (*comp_dir
!= NULL
)
8804 /* Irix 6.2 native cc prepends <machine>.: to the compilation
8805 directory, get rid of it. */
8806 char *cp
= strchr (*comp_dir
, ':');
8808 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
8813 *name
= "<unknown>";
8816 /* Handle DW_AT_stmt_list for a compilation unit.
8817 DIE is the DW_TAG_compile_unit die for CU.
8818 COMP_DIR is the compilation directory.
8819 WANT_LINE_INFO is non-zero if the pc/line-number mapping is needed. */
8822 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
8823 const char *comp_dir
) /* ARI: editCase function */
8825 struct attribute
*attr
;
8827 gdb_assert (! cu
->per_cu
->is_debug_types
);
8829 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
8832 unsigned int line_offset
= DW_UNSND (attr
);
8833 struct line_header
*line_header
8834 = dwarf_decode_line_header (line_offset
, cu
);
8838 cu
->line_header
= line_header
;
8839 make_cleanup (free_cu_line_header
, cu
);
8840 dwarf_decode_lines (line_header
, comp_dir
, cu
, NULL
, 1);
8845 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
8848 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
8850 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8851 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
8852 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
8853 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
8854 struct attribute
*attr
;
8855 const char *name
= NULL
;
8856 const char *comp_dir
= NULL
;
8857 struct die_info
*child_die
;
8858 bfd
*abfd
= objfile
->obfd
;
8861 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8863 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
8865 /* If we didn't find a lowpc, set it to highpc to avoid complaints
8866 from finish_block. */
8867 if (lowpc
== ((CORE_ADDR
) -1))
8872 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
8874 prepare_one_comp_unit (cu
, die
, cu
->language
);
8876 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
8877 standardised yet. As a workaround for the language detection we fall
8878 back to the DW_AT_producer string. */
8879 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
8880 cu
->language
= language_opencl
;
8882 /* Similar hack for Go. */
8883 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
8884 set_cu_language (DW_LANG_Go
, cu
);
8886 dwarf2_start_symtab (cu
, name
, comp_dir
, lowpc
);
8888 /* Decode line number information if present. We do this before
8889 processing child DIEs, so that the line header table is available
8890 for DW_AT_decl_file. */
8891 handle_DW_AT_stmt_list (die
, cu
, comp_dir
);
8893 /* Process all dies in compilation unit. */
8894 if (die
->child
!= NULL
)
8896 child_die
= die
->child
;
8897 while (child_die
&& child_die
->tag
)
8899 process_die (child_die
, cu
);
8900 child_die
= sibling_die (child_die
);
8904 /* Decode macro information, if present. Dwarf 2 macro information
8905 refers to information in the line number info statement program
8906 header, so we can only read it if we've read the header
8908 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
8909 if (attr
&& cu
->line_header
)
8911 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
8912 complaint (&symfile_complaints
,
8913 _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
8915 dwarf_decode_macros (cu
, DW_UNSND (attr
), comp_dir
, 1);
8919 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
8920 if (attr
&& cu
->line_header
)
8922 unsigned int macro_offset
= DW_UNSND (attr
);
8924 dwarf_decode_macros (cu
, macro_offset
, comp_dir
, 0);
8928 do_cleanups (back_to
);
8931 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
8932 Create the set of symtabs used by this TU, or if this TU is sharing
8933 symtabs with another TU and the symtabs have already been created
8934 then restore those symtabs in the line header.
8935 We don't need the pc/line-number mapping for type units. */
8938 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
8940 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8941 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
8942 struct type_unit_group
*tu_group
;
8944 struct line_header
*lh
;
8945 struct attribute
*attr
;
8946 unsigned int i
, line_offset
;
8947 struct signatured_type
*sig_type
;
8949 gdb_assert (per_cu
->is_debug_types
);
8950 sig_type
= (struct signatured_type
*) per_cu
;
8952 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
8954 /* If we're using .gdb_index (includes -readnow) then
8955 per_cu->type_unit_group may not have been set up yet. */
8956 if (sig_type
->type_unit_group
== NULL
)
8957 sig_type
->type_unit_group
= get_type_unit_group (cu
, attr
);
8958 tu_group
= sig_type
->type_unit_group
;
8960 /* If we've already processed this stmt_list there's no real need to
8961 do it again, we could fake it and just recreate the part we need
8962 (file name,index -> symtab mapping). If data shows this optimization
8963 is useful we can do it then. */
8964 first_time
= tu_group
->primary_symtab
== NULL
;
8966 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
8971 line_offset
= DW_UNSND (attr
);
8972 lh
= dwarf_decode_line_header (line_offset
, cu
);
8977 dwarf2_start_symtab (cu
, "", NULL
, 0);
8980 gdb_assert (tu_group
->symtabs
== NULL
);
8983 /* Note: The primary symtab will get allocated at the end. */
8987 cu
->line_header
= lh
;
8988 make_cleanup (free_cu_line_header
, cu
);
8992 dwarf2_start_symtab (cu
, "", NULL
, 0);
8994 tu_group
->num_symtabs
= lh
->num_file_names
;
8995 tu_group
->symtabs
= XNEWVEC (struct symtab
*, lh
->num_file_names
);
8997 for (i
= 0; i
< lh
->num_file_names
; ++i
)
8999 const char *dir
= NULL
;
9000 struct file_entry
*fe
= &lh
->file_names
[i
];
9003 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
9004 dwarf2_start_subfile (fe
->name
, dir
, NULL
);
9006 /* Note: We don't have to watch for the main subfile here, type units
9007 don't have DW_AT_name. */
9009 if (current_subfile
->symtab
== NULL
)
9011 /* NOTE: start_subfile will recognize when it's been passed
9012 a file it has already seen. So we can't assume there's a
9013 simple mapping from lh->file_names to subfiles,
9014 lh->file_names may contain dups. */
9015 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
9019 fe
->symtab
= current_subfile
->symtab
;
9020 tu_group
->symtabs
[i
] = fe
->symtab
;
9027 for (i
= 0; i
< lh
->num_file_names
; ++i
)
9029 struct file_entry
*fe
= &lh
->file_names
[i
];
9031 fe
->symtab
= tu_group
->symtabs
[i
];
9035 /* The main symtab is allocated last. Type units don't have DW_AT_name
9036 so they don't have a "real" (so to speak) symtab anyway.
9037 There is later code that will assign the main symtab to all symbols
9038 that don't have one. We need to handle the case of a symbol with a
9039 missing symtab (DW_AT_decl_file) anyway. */
9042 /* Process DW_TAG_type_unit.
9043 For TUs we want to skip the first top level sibling if it's not the
9044 actual type being defined by this TU. In this case the first top
9045 level sibling is there to provide context only. */
9048 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9050 struct die_info
*child_die
;
9052 prepare_one_comp_unit (cu
, die
, language_minimal
);
9054 /* Initialize (or reinitialize) the machinery for building symtabs.
9055 We do this before processing child DIEs, so that the line header table
9056 is available for DW_AT_decl_file. */
9057 setup_type_unit_groups (die
, cu
);
9059 if (die
->child
!= NULL
)
9061 child_die
= die
->child
;
9062 while (child_die
&& child_die
->tag
)
9064 process_die (child_die
, cu
);
9065 child_die
= sibling_die (child_die
);
9072 http://gcc.gnu.org/wiki/DebugFission
9073 http://gcc.gnu.org/wiki/DebugFissionDWP
9075 To simplify handling of both DWO files ("object" files with the DWARF info)
9076 and DWP files (a file with the DWOs packaged up into one file), we treat
9077 DWP files as having a collection of virtual DWO files. */
9080 hash_dwo_file (const void *item
)
9082 const struct dwo_file
*dwo_file
= item
;
9085 hash
= htab_hash_string (dwo_file
->dwo_name
);
9086 if (dwo_file
->comp_dir
!= NULL
)
9087 hash
+= htab_hash_string (dwo_file
->comp_dir
);
9092 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
9094 const struct dwo_file
*lhs
= item_lhs
;
9095 const struct dwo_file
*rhs
= item_rhs
;
9097 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
9099 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
9100 return lhs
->comp_dir
== rhs
->comp_dir
;
9101 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
9104 /* Allocate a hash table for DWO files. */
9107 allocate_dwo_file_hash_table (void)
9109 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9111 return htab_create_alloc_ex (41,
9115 &objfile
->objfile_obstack
,
9116 hashtab_obstack_allocate
,
9117 dummy_obstack_deallocate
);
9120 /* Lookup DWO file DWO_NAME. */
9123 lookup_dwo_file_slot (const char *dwo_name
, const char *comp_dir
)
9125 struct dwo_file find_entry
;
9128 if (dwarf2_per_objfile
->dwo_files
== NULL
)
9129 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
9131 memset (&find_entry
, 0, sizeof (find_entry
));
9132 find_entry
.dwo_name
= dwo_name
;
9133 find_entry
.comp_dir
= comp_dir
;
9134 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
9140 hash_dwo_unit (const void *item
)
9142 const struct dwo_unit
*dwo_unit
= item
;
9144 /* This drops the top 32 bits of the id, but is ok for a hash. */
9145 return dwo_unit
->signature
;
9149 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
9151 const struct dwo_unit
*lhs
= item_lhs
;
9152 const struct dwo_unit
*rhs
= item_rhs
;
9154 /* The signature is assumed to be unique within the DWO file.
9155 So while object file CU dwo_id's always have the value zero,
9156 that's OK, assuming each object file DWO file has only one CU,
9157 and that's the rule for now. */
9158 return lhs
->signature
== rhs
->signature
;
9161 /* Allocate a hash table for DWO CUs,TUs.
9162 There is one of these tables for each of CUs,TUs for each DWO file. */
9165 allocate_dwo_unit_table (struct objfile
*objfile
)
9167 /* Start out with a pretty small number.
9168 Generally DWO files contain only one CU and maybe some TUs. */
9169 return htab_create_alloc_ex (3,
9173 &objfile
->objfile_obstack
,
9174 hashtab_obstack_allocate
,
9175 dummy_obstack_deallocate
);
9178 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
9180 struct create_dwo_cu_data
9182 struct dwo_file
*dwo_file
;
9183 struct dwo_unit dwo_unit
;
9186 /* die_reader_func for create_dwo_cu. */
9189 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
9190 const gdb_byte
*info_ptr
,
9191 struct die_info
*comp_unit_die
,
9195 struct dwarf2_cu
*cu
= reader
->cu
;
9196 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9197 sect_offset offset
= cu
->per_cu
->offset
;
9198 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
9199 struct create_dwo_cu_data
*data
= datap
;
9200 struct dwo_file
*dwo_file
= data
->dwo_file
;
9201 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
9202 struct attribute
*attr
;
9204 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
9207 complaint (&symfile_complaints
,
9208 _("Dwarf Error: debug entry at offset 0x%x is missing"
9209 " its dwo_id [in module %s]"),
9210 offset
.sect_off
, dwo_file
->dwo_name
);
9214 dwo_unit
->dwo_file
= dwo_file
;
9215 dwo_unit
->signature
= DW_UNSND (attr
);
9216 dwo_unit
->section
= section
;
9217 dwo_unit
->offset
= offset
;
9218 dwo_unit
->length
= cu
->per_cu
->length
;
9220 if (dwarf2_read_debug
)
9221 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, dwo_id %s\n",
9222 offset
.sect_off
, hex_string (dwo_unit
->signature
));
9225 /* Create the dwo_unit for the lone CU in DWO_FILE.
9226 Note: This function processes DWO files only, not DWP files. */
9228 static struct dwo_unit
*
9229 create_dwo_cu (struct dwo_file
*dwo_file
)
9231 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9232 struct dwarf2_section_info
*section
= &dwo_file
->sections
.info
;
9235 const gdb_byte
*info_ptr
, *end_ptr
;
9236 struct create_dwo_cu_data create_dwo_cu_data
;
9237 struct dwo_unit
*dwo_unit
;
9239 dwarf2_read_section (objfile
, section
);
9240 info_ptr
= section
->buffer
;
9242 if (info_ptr
== NULL
)
9245 /* We can't set abfd until now because the section may be empty or
9246 not present, in which case section->asection will be NULL. */
9247 abfd
= get_section_bfd_owner (section
);
9249 if (dwarf2_read_debug
)
9251 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
9252 get_section_name (section
),
9253 get_section_file_name (section
));
9256 create_dwo_cu_data
.dwo_file
= dwo_file
;
9259 end_ptr
= info_ptr
+ section
->size
;
9260 while (info_ptr
< end_ptr
)
9262 struct dwarf2_per_cu_data per_cu
;
9264 memset (&create_dwo_cu_data
.dwo_unit
, 0,
9265 sizeof (create_dwo_cu_data
.dwo_unit
));
9266 memset (&per_cu
, 0, sizeof (per_cu
));
9267 per_cu
.objfile
= objfile
;
9268 per_cu
.is_debug_types
= 0;
9269 per_cu
.offset
.sect_off
= info_ptr
- section
->buffer
;
9270 per_cu
.section
= section
;
9272 init_cutu_and_read_dies_no_follow (&per_cu
, dwo_file
,
9273 create_dwo_cu_reader
,
9274 &create_dwo_cu_data
);
9276 if (create_dwo_cu_data
.dwo_unit
.dwo_file
!= NULL
)
9278 /* If we've already found one, complain. We only support one
9279 because having more than one requires hacking the dwo_name of
9280 each to match, which is highly unlikely to happen. */
9281 if (dwo_unit
!= NULL
)
9283 complaint (&symfile_complaints
,
9284 _("Multiple CUs in DWO file %s [in module %s]"),
9285 dwo_file
->dwo_name
, objfile_name (objfile
));
9289 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
9290 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
9293 info_ptr
+= per_cu
.length
;
9299 /* DWP file .debug_{cu,tu}_index section format:
9300 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
9304 Both index sections have the same format, and serve to map a 64-bit
9305 signature to a set of section numbers. Each section begins with a header,
9306 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
9307 indexes, and a pool of 32-bit section numbers. The index sections will be
9308 aligned at 8-byte boundaries in the file.
9310 The index section header consists of:
9312 V, 32 bit version number
9314 N, 32 bit number of compilation units or type units in the index
9315 M, 32 bit number of slots in the hash table
9317 Numbers are recorded using the byte order of the application binary.
9319 The hash table begins at offset 16 in the section, and consists of an array
9320 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
9321 order of the application binary). Unused slots in the hash table are 0.
9322 (We rely on the extreme unlikeliness of a signature being exactly 0.)
9324 The parallel table begins immediately after the hash table
9325 (at offset 16 + 8 * M from the beginning of the section), and consists of an
9326 array of 32-bit indexes (using the byte order of the application binary),
9327 corresponding 1-1 with slots in the hash table. Each entry in the parallel
9328 table contains a 32-bit index into the pool of section numbers. For unused
9329 hash table slots, the corresponding entry in the parallel table will be 0.
9331 The pool of section numbers begins immediately following the hash table
9332 (at offset 16 + 12 * M from the beginning of the section). The pool of
9333 section numbers consists of an array of 32-bit words (using the byte order
9334 of the application binary). Each item in the array is indexed starting
9335 from 0. The hash table entry provides the index of the first section
9336 number in the set. Additional section numbers in the set follow, and the
9337 set is terminated by a 0 entry (section number 0 is not used in ELF).
9339 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
9340 section must be the first entry in the set, and the .debug_abbrev.dwo must
9341 be the second entry. Other members of the set may follow in any order.
9347 DWP Version 2 combines all the .debug_info, etc. sections into one,
9348 and the entries in the index tables are now offsets into these sections.
9349 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
9352 Index Section Contents:
9354 Hash Table of Signatures dwp_hash_table.hash_table
9355 Parallel Table of Indices dwp_hash_table.unit_table
9356 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
9357 Table of Section Sizes dwp_hash_table.v2.sizes
9359 The index section header consists of:
9361 V, 32 bit version number
9362 L, 32 bit number of columns in the table of section offsets
9363 N, 32 bit number of compilation units or type units in the index
9364 M, 32 bit number of slots in the hash table
9366 Numbers are recorded using the byte order of the application binary.
9368 The hash table has the same format as version 1.
9369 The parallel table of indices has the same format as version 1,
9370 except that the entries are origin-1 indices into the table of sections
9371 offsets and the table of section sizes.
9373 The table of offsets begins immediately following the parallel table
9374 (at offset 16 + 12 * M from the beginning of the section). The table is
9375 a two-dimensional array of 32-bit words (using the byte order of the
9376 application binary), with L columns and N+1 rows, in row-major order.
9377 Each row in the array is indexed starting from 0. The first row provides
9378 a key to the remaining rows: each column in this row provides an identifier
9379 for a debug section, and the offsets in the same column of subsequent rows
9380 refer to that section. The section identifiers are:
9382 DW_SECT_INFO 1 .debug_info.dwo
9383 DW_SECT_TYPES 2 .debug_types.dwo
9384 DW_SECT_ABBREV 3 .debug_abbrev.dwo
9385 DW_SECT_LINE 4 .debug_line.dwo
9386 DW_SECT_LOC 5 .debug_loc.dwo
9387 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
9388 DW_SECT_MACINFO 7 .debug_macinfo.dwo
9389 DW_SECT_MACRO 8 .debug_macro.dwo
9391 The offsets provided by the CU and TU index sections are the base offsets
9392 for the contributions made by each CU or TU to the corresponding section
9393 in the package file. Each CU and TU header contains an abbrev_offset
9394 field, used to find the abbreviations table for that CU or TU within the
9395 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
9396 be interpreted as relative to the base offset given in the index section.
9397 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
9398 should be interpreted as relative to the base offset for .debug_line.dwo,
9399 and offsets into other debug sections obtained from DWARF attributes should
9400 also be interpreted as relative to the corresponding base offset.
9402 The table of sizes begins immediately following the table of offsets.
9403 Like the table of offsets, it is a two-dimensional array of 32-bit words,
9404 with L columns and N rows, in row-major order. Each row in the array is
9405 indexed starting from 1 (row 0 is shared by the two tables).
9409 Hash table lookup is handled the same in version 1 and 2:
9411 We assume that N and M will not exceed 2^32 - 1.
9412 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
9414 Given a 64-bit compilation unit signature or a type signature S, an entry
9415 in the hash table is located as follows:
9417 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
9418 the low-order k bits all set to 1.
9420 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
9422 3) If the hash table entry at index H matches the signature, use that
9423 entry. If the hash table entry at index H is unused (all zeroes),
9424 terminate the search: the signature is not present in the table.
9426 4) Let H = (H + H') modulo M. Repeat at Step 3.
9428 Because M > N and H' and M are relatively prime, the search is guaranteed
9429 to stop at an unused slot or find the match. */
9431 /* Create a hash table to map DWO IDs to their CU/TU entry in
9432 .debug_{info,types}.dwo in DWP_FILE.
9433 Returns NULL if there isn't one.
9434 Note: This function processes DWP files only, not DWO files. */
9436 static struct dwp_hash_table
*
9437 create_dwp_hash_table (struct dwp_file
*dwp_file
, int is_debug_types
)
9439 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9440 bfd
*dbfd
= dwp_file
->dbfd
;
9441 const gdb_byte
*index_ptr
, *index_end
;
9442 struct dwarf2_section_info
*index
;
9443 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
9444 struct dwp_hash_table
*htab
;
9447 index
= &dwp_file
->sections
.tu_index
;
9449 index
= &dwp_file
->sections
.cu_index
;
9451 if (dwarf2_section_empty_p (index
))
9453 dwarf2_read_section (objfile
, index
);
9455 index_ptr
= index
->buffer
;
9456 index_end
= index_ptr
+ index
->size
;
9458 version
= read_4_bytes (dbfd
, index_ptr
);
9461 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
9465 nr_units
= read_4_bytes (dbfd
, index_ptr
);
9467 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
9470 if (version
!= 1 && version
!= 2)
9472 error (_("Dwarf Error: unsupported DWP file version (%s)"
9474 pulongest (version
), dwp_file
->name
);
9476 if (nr_slots
!= (nr_slots
& -nr_slots
))
9478 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
9479 " is not power of 2 [in module %s]"),
9480 pulongest (nr_slots
), dwp_file
->name
);
9483 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
9484 htab
->version
= version
;
9485 htab
->nr_columns
= nr_columns
;
9486 htab
->nr_units
= nr_units
;
9487 htab
->nr_slots
= nr_slots
;
9488 htab
->hash_table
= index_ptr
;
9489 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
9491 /* Exit early if the table is empty. */
9492 if (nr_slots
== 0 || nr_units
== 0
9493 || (version
== 2 && nr_columns
== 0))
9495 /* All must be zero. */
9496 if (nr_slots
!= 0 || nr_units
!= 0
9497 || (version
== 2 && nr_columns
!= 0))
9499 complaint (&symfile_complaints
,
9500 _("Empty DWP but nr_slots,nr_units,nr_columns not"
9501 " all zero [in modules %s]"),
9509 htab
->section_pool
.v1
.indices
=
9510 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
9511 /* It's harder to decide whether the section is too small in v1.
9512 V1 is deprecated anyway so we punt. */
9516 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
9517 int *ids
= htab
->section_pool
.v2
.section_ids
;
9518 /* Reverse map for error checking. */
9519 int ids_seen
[DW_SECT_MAX
+ 1];
9524 error (_("Dwarf Error: bad DWP hash table, too few columns"
9525 " in section table [in module %s]"),
9528 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
9530 error (_("Dwarf Error: bad DWP hash table, too many columns"
9531 " in section table [in module %s]"),
9534 memset (ids
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
9535 memset (ids_seen
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
9536 for (i
= 0; i
< nr_columns
; ++i
)
9538 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
9540 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
9542 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
9543 " in section table [in module %s]"),
9544 id
, dwp_file
->name
);
9546 if (ids_seen
[id
] != -1)
9548 error (_("Dwarf Error: bad DWP hash table, duplicate section"
9549 " id %d in section table [in module %s]"),
9550 id
, dwp_file
->name
);
9555 /* Must have exactly one info or types section. */
9556 if (((ids_seen
[DW_SECT_INFO
] != -1)
9557 + (ids_seen
[DW_SECT_TYPES
] != -1))
9560 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
9561 " DWO info/types section [in module %s]"),
9564 /* Must have an abbrev section. */
9565 if (ids_seen
[DW_SECT_ABBREV
] == -1)
9567 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
9568 " section [in module %s]"),
9571 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
9572 htab
->section_pool
.v2
.sizes
=
9573 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
9574 * nr_units
* nr_columns
);
9575 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
9576 * nr_units
* nr_columns
))
9579 error (_("Dwarf Error: DWP index section is corrupt (too small)"
9588 /* Update SECTIONS with the data from SECTP.
9590 This function is like the other "locate" section routines that are
9591 passed to bfd_map_over_sections, but in this context the sections to
9592 read comes from the DWP V1 hash table, not the full ELF section table.
9594 The result is non-zero for success, or zero if an error was found. */
9597 locate_v1_virtual_dwo_sections (asection
*sectp
,
9598 struct virtual_v1_dwo_sections
*sections
)
9600 const struct dwop_section_names
*names
= &dwop_section_names
;
9602 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
9604 /* There can be only one. */
9605 if (sections
->abbrev
.s
.asection
!= NULL
)
9607 sections
->abbrev
.s
.asection
= sectp
;
9608 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
9610 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
9611 || section_is_p (sectp
->name
, &names
->types_dwo
))
9613 /* There can be only one. */
9614 if (sections
->info_or_types
.s
.asection
!= NULL
)
9616 sections
->info_or_types
.s
.asection
= sectp
;
9617 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
9619 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
9621 /* There can be only one. */
9622 if (sections
->line
.s
.asection
!= NULL
)
9624 sections
->line
.s
.asection
= sectp
;
9625 sections
->line
.size
= bfd_get_section_size (sectp
);
9627 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
9629 /* There can be only one. */
9630 if (sections
->loc
.s
.asection
!= NULL
)
9632 sections
->loc
.s
.asection
= sectp
;
9633 sections
->loc
.size
= bfd_get_section_size (sectp
);
9635 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
9637 /* There can be only one. */
9638 if (sections
->macinfo
.s
.asection
!= NULL
)
9640 sections
->macinfo
.s
.asection
= sectp
;
9641 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
9643 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
9645 /* There can be only one. */
9646 if (sections
->macro
.s
.asection
!= NULL
)
9648 sections
->macro
.s
.asection
= sectp
;
9649 sections
->macro
.size
= bfd_get_section_size (sectp
);
9651 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
9653 /* There can be only one. */
9654 if (sections
->str_offsets
.s
.asection
!= NULL
)
9656 sections
->str_offsets
.s
.asection
= sectp
;
9657 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
9661 /* No other kind of section is valid. */
9668 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
9669 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
9670 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
9671 This is for DWP version 1 files. */
9673 static struct dwo_unit
*
9674 create_dwo_unit_in_dwp_v1 (struct dwp_file
*dwp_file
,
9675 uint32_t unit_index
,
9676 const char *comp_dir
,
9677 ULONGEST signature
, int is_debug_types
)
9679 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9680 const struct dwp_hash_table
*dwp_htab
=
9681 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
9682 bfd
*dbfd
= dwp_file
->dbfd
;
9683 const char *kind
= is_debug_types
? "TU" : "CU";
9684 struct dwo_file
*dwo_file
;
9685 struct dwo_unit
*dwo_unit
;
9686 struct virtual_v1_dwo_sections sections
;
9687 void **dwo_file_slot
;
9688 char *virtual_dwo_name
;
9689 struct dwarf2_section_info
*cutu
;
9690 struct cleanup
*cleanups
;
9693 gdb_assert (dwp_file
->version
== 1);
9695 if (dwarf2_read_debug
)
9697 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
9699 pulongest (unit_index
), hex_string (signature
),
9703 /* Fetch the sections of this DWO unit.
9704 Put a limit on the number of sections we look for so that bad data
9705 doesn't cause us to loop forever. */
9707 #define MAX_NR_V1_DWO_SECTIONS \
9708 (1 /* .debug_info or .debug_types */ \
9709 + 1 /* .debug_abbrev */ \
9710 + 1 /* .debug_line */ \
9711 + 1 /* .debug_loc */ \
9712 + 1 /* .debug_str_offsets */ \
9713 + 1 /* .debug_macro or .debug_macinfo */ \
9714 + 1 /* trailing zero */)
9716 memset (§ions
, 0, sizeof (sections
));
9717 cleanups
= make_cleanup (null_cleanup
, 0);
9719 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
9722 uint32_t section_nr
=
9724 dwp_htab
->section_pool
.v1
.indices
9725 + (unit_index
+ i
) * sizeof (uint32_t));
9727 if (section_nr
== 0)
9729 if (section_nr
>= dwp_file
->num_sections
)
9731 error (_("Dwarf Error: bad DWP hash table, section number too large"
9736 sectp
= dwp_file
->elf_sections
[section_nr
];
9737 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
9739 error (_("Dwarf Error: bad DWP hash table, invalid section found"
9746 || dwarf2_section_empty_p (§ions
.info_or_types
)
9747 || dwarf2_section_empty_p (§ions
.abbrev
))
9749 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
9753 if (i
== MAX_NR_V1_DWO_SECTIONS
)
9755 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
9760 /* It's easier for the rest of the code if we fake a struct dwo_file and
9761 have dwo_unit "live" in that. At least for now.
9763 The DWP file can be made up of a random collection of CUs and TUs.
9764 However, for each CU + set of TUs that came from the same original DWO
9765 file, we can combine them back into a virtual DWO file to save space
9766 (fewer struct dwo_file objects to allocate). Remember that for really
9767 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
9770 xstrprintf ("virtual-dwo/%d-%d-%d-%d",
9771 get_section_id (§ions
.abbrev
),
9772 get_section_id (§ions
.line
),
9773 get_section_id (§ions
.loc
),
9774 get_section_id (§ions
.str_offsets
));
9775 make_cleanup (xfree
, virtual_dwo_name
);
9776 /* Can we use an existing virtual DWO file? */
9777 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
9778 /* Create one if necessary. */
9779 if (*dwo_file_slot
== NULL
)
9781 if (dwarf2_read_debug
)
9783 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
9786 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
9787 dwo_file
->dwo_name
= obstack_copy0 (&objfile
->objfile_obstack
,
9789 strlen (virtual_dwo_name
));
9790 dwo_file
->comp_dir
= comp_dir
;
9791 dwo_file
->sections
.abbrev
= sections
.abbrev
;
9792 dwo_file
->sections
.line
= sections
.line
;
9793 dwo_file
->sections
.loc
= sections
.loc
;
9794 dwo_file
->sections
.macinfo
= sections
.macinfo
;
9795 dwo_file
->sections
.macro
= sections
.macro
;
9796 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
9797 /* The "str" section is global to the entire DWP file. */
9798 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
9799 /* The info or types section is assigned below to dwo_unit,
9800 there's no need to record it in dwo_file.
9801 Also, we can't simply record type sections in dwo_file because
9802 we record a pointer into the vector in dwo_unit. As we collect more
9803 types we'll grow the vector and eventually have to reallocate space
9804 for it, invalidating all copies of pointers into the previous
9806 *dwo_file_slot
= dwo_file
;
9810 if (dwarf2_read_debug
)
9812 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
9815 dwo_file
= *dwo_file_slot
;
9817 do_cleanups (cleanups
);
9819 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
9820 dwo_unit
->dwo_file
= dwo_file
;
9821 dwo_unit
->signature
= signature
;
9822 dwo_unit
->section
= obstack_alloc (&objfile
->objfile_obstack
,
9823 sizeof (struct dwarf2_section_info
));
9824 *dwo_unit
->section
= sections
.info_or_types
;
9825 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
9830 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
9831 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
9832 piece within that section used by a TU/CU, return a virtual section
9833 of just that piece. */
9835 static struct dwarf2_section_info
9836 create_dwp_v2_section (struct dwarf2_section_info
*section
,
9837 bfd_size_type offset
, bfd_size_type size
)
9839 struct dwarf2_section_info result
;
9842 gdb_assert (section
!= NULL
);
9843 gdb_assert (!section
->is_virtual
);
9845 memset (&result
, 0, sizeof (result
));
9846 result
.s
.containing_section
= section
;
9847 result
.is_virtual
= 1;
9852 sectp
= get_section_bfd_section (section
);
9854 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
9855 bounds of the real section. This is a pretty-rare event, so just
9856 flag an error (easier) instead of a warning and trying to cope. */
9858 || offset
+ size
> bfd_get_section_size (sectp
))
9860 bfd
*abfd
= sectp
->owner
;
9862 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
9863 " in section %s [in module %s]"),
9864 sectp
? bfd_section_name (abfd
, sectp
) : "<unknown>",
9865 objfile_name (dwarf2_per_objfile
->objfile
));
9868 result
.virtual_offset
= offset
;
9873 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
9874 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
9875 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
9876 This is for DWP version 2 files. */
9878 static struct dwo_unit
*
9879 create_dwo_unit_in_dwp_v2 (struct dwp_file
*dwp_file
,
9880 uint32_t unit_index
,
9881 const char *comp_dir
,
9882 ULONGEST signature
, int is_debug_types
)
9884 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9885 const struct dwp_hash_table
*dwp_htab
=
9886 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
9887 bfd
*dbfd
= dwp_file
->dbfd
;
9888 const char *kind
= is_debug_types
? "TU" : "CU";
9889 struct dwo_file
*dwo_file
;
9890 struct dwo_unit
*dwo_unit
;
9891 struct virtual_v2_dwo_sections sections
;
9892 void **dwo_file_slot
;
9893 char *virtual_dwo_name
;
9894 struct dwarf2_section_info
*cutu
;
9895 struct cleanup
*cleanups
;
9898 gdb_assert (dwp_file
->version
== 2);
9900 if (dwarf2_read_debug
)
9902 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
9904 pulongest (unit_index
), hex_string (signature
),
9908 /* Fetch the section offsets of this DWO unit. */
9910 memset (§ions
, 0, sizeof (sections
));
9911 cleanups
= make_cleanup (null_cleanup
, 0);
9913 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
9915 uint32_t offset
= read_4_bytes (dbfd
,
9916 dwp_htab
->section_pool
.v2
.offsets
9917 + (((unit_index
- 1) * dwp_htab
->nr_columns
9919 * sizeof (uint32_t)));
9920 uint32_t size
= read_4_bytes (dbfd
,
9921 dwp_htab
->section_pool
.v2
.sizes
9922 + (((unit_index
- 1) * dwp_htab
->nr_columns
9924 * sizeof (uint32_t)));
9926 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
9930 sections
.info_or_types_offset
= offset
;
9931 sections
.info_or_types_size
= size
;
9933 case DW_SECT_ABBREV
:
9934 sections
.abbrev_offset
= offset
;
9935 sections
.abbrev_size
= size
;
9938 sections
.line_offset
= offset
;
9939 sections
.line_size
= size
;
9942 sections
.loc_offset
= offset
;
9943 sections
.loc_size
= size
;
9945 case DW_SECT_STR_OFFSETS
:
9946 sections
.str_offsets_offset
= offset
;
9947 sections
.str_offsets_size
= size
;
9949 case DW_SECT_MACINFO
:
9950 sections
.macinfo_offset
= offset
;
9951 sections
.macinfo_size
= size
;
9954 sections
.macro_offset
= offset
;
9955 sections
.macro_size
= size
;
9960 /* It's easier for the rest of the code if we fake a struct dwo_file and
9961 have dwo_unit "live" in that. At least for now.
9963 The DWP file can be made up of a random collection of CUs and TUs.
9964 However, for each CU + set of TUs that came from the same original DWO
9965 file, we can combine them back into a virtual DWO file to save space
9966 (fewer struct dwo_file objects to allocate). Remember that for really
9967 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
9970 xstrprintf ("virtual-dwo/%ld-%ld-%ld-%ld",
9971 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
9972 (long) (sections
.line_size
? sections
.line_offset
: 0),
9973 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
9974 (long) (sections
.str_offsets_size
9975 ? sections
.str_offsets_offset
: 0));
9976 make_cleanup (xfree
, virtual_dwo_name
);
9977 /* Can we use an existing virtual DWO file? */
9978 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
9979 /* Create one if necessary. */
9980 if (*dwo_file_slot
== NULL
)
9982 if (dwarf2_read_debug
)
9984 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
9987 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
9988 dwo_file
->dwo_name
= obstack_copy0 (&objfile
->objfile_obstack
,
9990 strlen (virtual_dwo_name
));
9991 dwo_file
->comp_dir
= comp_dir
;
9992 dwo_file
->sections
.abbrev
=
9993 create_dwp_v2_section (&dwp_file
->sections
.abbrev
,
9994 sections
.abbrev_offset
, sections
.abbrev_size
);
9995 dwo_file
->sections
.line
=
9996 create_dwp_v2_section (&dwp_file
->sections
.line
,
9997 sections
.line_offset
, sections
.line_size
);
9998 dwo_file
->sections
.loc
=
9999 create_dwp_v2_section (&dwp_file
->sections
.loc
,
10000 sections
.loc_offset
, sections
.loc_size
);
10001 dwo_file
->sections
.macinfo
=
10002 create_dwp_v2_section (&dwp_file
->sections
.macinfo
,
10003 sections
.macinfo_offset
, sections
.macinfo_size
);
10004 dwo_file
->sections
.macro
=
10005 create_dwp_v2_section (&dwp_file
->sections
.macro
,
10006 sections
.macro_offset
, sections
.macro_size
);
10007 dwo_file
->sections
.str_offsets
=
10008 create_dwp_v2_section (&dwp_file
->sections
.str_offsets
,
10009 sections
.str_offsets_offset
,
10010 sections
.str_offsets_size
);
10011 /* The "str" section is global to the entire DWP file. */
10012 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10013 /* The info or types section is assigned below to dwo_unit,
10014 there's no need to record it in dwo_file.
10015 Also, we can't simply record type sections in dwo_file because
10016 we record a pointer into the vector in dwo_unit. As we collect more
10017 types we'll grow the vector and eventually have to reallocate space
10018 for it, invalidating all copies of pointers into the previous
10020 *dwo_file_slot
= dwo_file
;
10024 if (dwarf2_read_debug
)
10026 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10029 dwo_file
= *dwo_file_slot
;
10031 do_cleanups (cleanups
);
10033 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10034 dwo_unit
->dwo_file
= dwo_file
;
10035 dwo_unit
->signature
= signature
;
10036 dwo_unit
->section
= obstack_alloc (&objfile
->objfile_obstack
,
10037 sizeof (struct dwarf2_section_info
));
10038 *dwo_unit
->section
= create_dwp_v2_section (is_debug_types
10039 ? &dwp_file
->sections
.types
10040 : &dwp_file
->sections
.info
,
10041 sections
.info_or_types_offset
,
10042 sections
.info_or_types_size
);
10043 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10048 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
10049 Returns NULL if the signature isn't found. */
10051 static struct dwo_unit
*
10052 lookup_dwo_unit_in_dwp (struct dwp_file
*dwp_file
, const char *comp_dir
,
10053 ULONGEST signature
, int is_debug_types
)
10055 const struct dwp_hash_table
*dwp_htab
=
10056 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10057 bfd
*dbfd
= dwp_file
->dbfd
;
10058 uint32_t mask
= dwp_htab
->nr_slots
- 1;
10059 uint32_t hash
= signature
& mask
;
10060 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
10063 struct dwo_unit find_dwo_cu
, *dwo_cu
;
10065 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
10066 find_dwo_cu
.signature
= signature
;
10067 slot
= htab_find_slot (is_debug_types
10068 ? dwp_file
->loaded_tus
10069 : dwp_file
->loaded_cus
,
10070 &find_dwo_cu
, INSERT
);
10075 /* Use a for loop so that we don't loop forever on bad debug info. */
10076 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
10078 ULONGEST signature_in_table
;
10080 signature_in_table
=
10081 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
10082 if (signature_in_table
== signature
)
10084 uint32_t unit_index
=
10085 read_4_bytes (dbfd
,
10086 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
10088 if (dwp_file
->version
== 1)
10090 *slot
= create_dwo_unit_in_dwp_v1 (dwp_file
, unit_index
,
10091 comp_dir
, signature
,
10096 *slot
= create_dwo_unit_in_dwp_v2 (dwp_file
, unit_index
,
10097 comp_dir
, signature
,
10102 if (signature_in_table
== 0)
10104 hash
= (hash
+ hash2
) & mask
;
10107 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
10108 " [in module %s]"),
10112 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
10113 Open the file specified by FILE_NAME and hand it off to BFD for
10114 preliminary analysis. Return a newly initialized bfd *, which
10115 includes a canonicalized copy of FILE_NAME.
10116 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
10117 SEARCH_CWD is true if the current directory is to be searched.
10118 It will be searched before debug-file-directory.
10119 If successful, the file is added to the bfd include table of the
10120 objfile's bfd (see gdb_bfd_record_inclusion).
10121 If unable to find/open the file, return NULL.
10122 NOTE: This function is derived from symfile_bfd_open. */
10125 try_open_dwop_file (const char *file_name
, int is_dwp
, int search_cwd
)
10129 char *absolute_name
;
10130 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
10131 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
10132 to debug_file_directory. */
10134 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
10138 if (*debug_file_directory
!= '\0')
10139 search_path
= concat (".", dirname_separator_string
,
10140 debug_file_directory
, NULL
);
10142 search_path
= xstrdup (".");
10145 search_path
= xstrdup (debug_file_directory
);
10147 flags
= OPF_RETURN_REALPATH
;
10149 flags
|= OPF_SEARCH_IN_PATH
;
10150 desc
= openp (search_path
, flags
, file_name
,
10151 O_RDONLY
| O_BINARY
, &absolute_name
);
10152 xfree (search_path
);
10156 sym_bfd
= gdb_bfd_open (absolute_name
, gnutarget
, desc
);
10157 xfree (absolute_name
);
10158 if (sym_bfd
== NULL
)
10160 bfd_set_cacheable (sym_bfd
, 1);
10162 if (!bfd_check_format (sym_bfd
, bfd_object
))
10164 gdb_bfd_unref (sym_bfd
); /* This also closes desc. */
10168 /* Success. Record the bfd as having been included by the objfile's bfd.
10169 This is important because things like demangled_names_hash lives in the
10170 objfile's per_bfd space and may have references to things like symbol
10171 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
10172 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
);
10177 /* Try to open DWO file FILE_NAME.
10178 COMP_DIR is the DW_AT_comp_dir attribute.
10179 The result is the bfd handle of the file.
10180 If there is a problem finding or opening the file, return NULL.
10181 Upon success, the canonicalized path of the file is stored in the bfd,
10182 same as symfile_bfd_open. */
10185 open_dwo_file (const char *file_name
, const char *comp_dir
)
10189 if (IS_ABSOLUTE_PATH (file_name
))
10190 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 0 /*search_cwd*/);
10192 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
10194 if (comp_dir
!= NULL
)
10196 char *path_to_try
= concat (comp_dir
, SLASH_STRING
, file_name
, NULL
);
10198 /* NOTE: If comp_dir is a relative path, this will also try the
10199 search path, which seems useful. */
10200 abfd
= try_open_dwop_file (path_to_try
, 0 /*is_dwp*/, 1 /*search_cwd*/);
10201 xfree (path_to_try
);
10206 /* That didn't work, try debug-file-directory, which, despite its name,
10207 is a list of paths. */
10209 if (*debug_file_directory
== '\0')
10212 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 1 /*search_cwd*/);
10215 /* This function is mapped across the sections and remembers the offset and
10216 size of each of the DWO debugging sections we are interested in. */
10219 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
10221 struct dwo_sections
*dwo_sections
= dwo_sections_ptr
;
10222 const struct dwop_section_names
*names
= &dwop_section_names
;
10224 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10226 dwo_sections
->abbrev
.s
.asection
= sectp
;
10227 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
10229 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
10231 dwo_sections
->info
.s
.asection
= sectp
;
10232 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
10234 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10236 dwo_sections
->line
.s
.asection
= sectp
;
10237 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
10239 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10241 dwo_sections
->loc
.s
.asection
= sectp
;
10242 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
10244 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10246 dwo_sections
->macinfo
.s
.asection
= sectp
;
10247 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
10249 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10251 dwo_sections
->macro
.s
.asection
= sectp
;
10252 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
10254 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
10256 dwo_sections
->str
.s
.asection
= sectp
;
10257 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
10259 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10261 dwo_sections
->str_offsets
.s
.asection
= sectp
;
10262 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
10264 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
10266 struct dwarf2_section_info type_section
;
10268 memset (&type_section
, 0, sizeof (type_section
));
10269 type_section
.s
.asection
= sectp
;
10270 type_section
.size
= bfd_get_section_size (sectp
);
10271 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
10276 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
10277 by PER_CU. This is for the non-DWP case.
10278 The result is NULL if DWO_NAME can't be found. */
10280 static struct dwo_file
*
10281 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
10282 const char *dwo_name
, const char *comp_dir
)
10284 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10285 struct dwo_file
*dwo_file
;
10287 struct cleanup
*cleanups
;
10289 dbfd
= open_dwo_file (dwo_name
, comp_dir
);
10292 if (dwarf2_read_debug
)
10293 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
10296 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10297 dwo_file
->dwo_name
= dwo_name
;
10298 dwo_file
->comp_dir
= comp_dir
;
10299 dwo_file
->dbfd
= dbfd
;
10301 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwo_file
);
10303 bfd_map_over_sections (dbfd
, dwarf2_locate_dwo_sections
, &dwo_file
->sections
);
10305 dwo_file
->cu
= create_dwo_cu (dwo_file
);
10307 dwo_file
->tus
= create_debug_types_hash_table (dwo_file
,
10308 dwo_file
->sections
.types
);
10310 discard_cleanups (cleanups
);
10312 if (dwarf2_read_debug
)
10313 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
10318 /* This function is mapped across the sections and remembers the offset and
10319 size of each of the DWP debugging sections common to version 1 and 2 that
10320 we are interested in. */
10323 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
10324 void *dwp_file_ptr
)
10326 struct dwp_file
*dwp_file
= dwp_file_ptr
;
10327 const struct dwop_section_names
*names
= &dwop_section_names
;
10328 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
10330 /* Record the ELF section number for later lookup: this is what the
10331 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10332 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
10333 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
10335 /* Look for specific sections that we need. */
10336 if (section_is_p (sectp
->name
, &names
->str_dwo
))
10338 dwp_file
->sections
.str
.s
.asection
= sectp
;
10339 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
10341 else if (section_is_p (sectp
->name
, &names
->cu_index
))
10343 dwp_file
->sections
.cu_index
.s
.asection
= sectp
;
10344 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
10346 else if (section_is_p (sectp
->name
, &names
->tu_index
))
10348 dwp_file
->sections
.tu_index
.s
.asection
= sectp
;
10349 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
10353 /* This function is mapped across the sections and remembers the offset and
10354 size of each of the DWP version 2 debugging sections that we are interested
10355 in. This is split into a separate function because we don't know if we
10356 have version 1 or 2 until we parse the cu_index/tu_index sections. */
10359 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
10361 struct dwp_file
*dwp_file
= dwp_file_ptr
;
10362 const struct dwop_section_names
*names
= &dwop_section_names
;
10363 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
10365 /* Record the ELF section number for later lookup: this is what the
10366 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10367 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
10368 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
10370 /* Look for specific sections that we need. */
10371 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10373 dwp_file
->sections
.abbrev
.s
.asection
= sectp
;
10374 dwp_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
10376 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
10378 dwp_file
->sections
.info
.s
.asection
= sectp
;
10379 dwp_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
10381 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10383 dwp_file
->sections
.line
.s
.asection
= sectp
;
10384 dwp_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
10386 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10388 dwp_file
->sections
.loc
.s
.asection
= sectp
;
10389 dwp_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
10391 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10393 dwp_file
->sections
.macinfo
.s
.asection
= sectp
;
10394 dwp_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
10396 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10398 dwp_file
->sections
.macro
.s
.asection
= sectp
;
10399 dwp_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
10401 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10403 dwp_file
->sections
.str_offsets
.s
.asection
= sectp
;
10404 dwp_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
10406 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
10408 dwp_file
->sections
.types
.s
.asection
= sectp
;
10409 dwp_file
->sections
.types
.size
= bfd_get_section_size (sectp
);
10413 /* Hash function for dwp_file loaded CUs/TUs. */
10416 hash_dwp_loaded_cutus (const void *item
)
10418 const struct dwo_unit
*dwo_unit
= item
;
10420 /* This drops the top 32 bits of the signature, but is ok for a hash. */
10421 return dwo_unit
->signature
;
10424 /* Equality function for dwp_file loaded CUs/TUs. */
10427 eq_dwp_loaded_cutus (const void *a
, const void *b
)
10429 const struct dwo_unit
*dua
= a
;
10430 const struct dwo_unit
*dub
= b
;
10432 return dua
->signature
== dub
->signature
;
10435 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
10438 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
10440 return htab_create_alloc_ex (3,
10441 hash_dwp_loaded_cutus
,
10442 eq_dwp_loaded_cutus
,
10444 &objfile
->objfile_obstack
,
10445 hashtab_obstack_allocate
,
10446 dummy_obstack_deallocate
);
10449 /* Try to open DWP file FILE_NAME.
10450 The result is the bfd handle of the file.
10451 If there is a problem finding or opening the file, return NULL.
10452 Upon success, the canonicalized path of the file is stored in the bfd,
10453 same as symfile_bfd_open. */
10456 open_dwp_file (const char *file_name
)
10460 abfd
= try_open_dwop_file (file_name
, 1 /*is_dwp*/, 1 /*search_cwd*/);
10464 /* Work around upstream bug 15652.
10465 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
10466 [Whether that's a "bug" is debatable, but it is getting in our way.]
10467 We have no real idea where the dwp file is, because gdb's realpath-ing
10468 of the executable's path may have discarded the needed info.
10469 [IWBN if the dwp file name was recorded in the executable, akin to
10470 .gnu_debuglink, but that doesn't exist yet.]
10471 Strip the directory from FILE_NAME and search again. */
10472 if (*debug_file_directory
!= '\0')
10474 /* Don't implicitly search the current directory here.
10475 If the user wants to search "." to handle this case,
10476 it must be added to debug-file-directory. */
10477 return try_open_dwop_file (lbasename (file_name
), 1 /*is_dwp*/,
10484 /* Initialize the use of the DWP file for the current objfile.
10485 By convention the name of the DWP file is ${objfile}.dwp.
10486 The result is NULL if it can't be found. */
10488 static struct dwp_file
*
10489 open_and_init_dwp_file (void)
10491 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10492 struct dwp_file
*dwp_file
;
10495 struct cleanup
*cleanups
;
10497 /* Try to find first .dwp for the binary file before any symbolic links
10499 dwp_name
= xstrprintf ("%s.dwp", objfile
->original_name
);
10500 cleanups
= make_cleanup (xfree
, dwp_name
);
10502 dbfd
= open_dwp_file (dwp_name
);
10504 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
10506 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
10507 dwp_name
= xstrprintf ("%s.dwp", objfile_name (objfile
));
10508 make_cleanup (xfree
, dwp_name
);
10509 dbfd
= open_dwp_file (dwp_name
);
10514 if (dwarf2_read_debug
)
10515 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
);
10516 do_cleanups (cleanups
);
10519 dwp_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_file
);
10520 dwp_file
->name
= bfd_get_filename (dbfd
);
10521 dwp_file
->dbfd
= dbfd
;
10522 do_cleanups (cleanups
);
10524 /* +1: section 0 is unused */
10525 dwp_file
->num_sections
= bfd_count_sections (dbfd
) + 1;
10526 dwp_file
->elf_sections
=
10527 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
10528 dwp_file
->num_sections
, asection
*);
10530 bfd_map_over_sections (dbfd
, dwarf2_locate_common_dwp_sections
, dwp_file
);
10532 dwp_file
->cus
= create_dwp_hash_table (dwp_file
, 0);
10534 dwp_file
->tus
= create_dwp_hash_table (dwp_file
, 1);
10536 /* The DWP file version is stored in the hash table. Oh well. */
10537 if (dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
10539 /* Technically speaking, we should try to limp along, but this is
10540 pretty bizarre. We use pulongest here because that's the established
10541 portability solution (e.g, we cannot use %u for uint32_t). */
10542 error (_("Dwarf Error: DWP file CU version %s doesn't match"
10543 " TU version %s [in DWP file %s]"),
10544 pulongest (dwp_file
->cus
->version
),
10545 pulongest (dwp_file
->tus
->version
), dwp_name
);
10547 dwp_file
->version
= dwp_file
->cus
->version
;
10549 if (dwp_file
->version
== 2)
10550 bfd_map_over_sections (dbfd
, dwarf2_locate_v2_dwp_sections
, dwp_file
);
10552 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
10553 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
10555 if (dwarf2_read_debug
)
10557 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
10558 fprintf_unfiltered (gdb_stdlog
,
10559 " %s CUs, %s TUs\n",
10560 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
10561 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
10567 /* Wrapper around open_and_init_dwp_file, only open it once. */
10569 static struct dwp_file
*
10570 get_dwp_file (void)
10572 if (! dwarf2_per_objfile
->dwp_checked
)
10574 dwarf2_per_objfile
->dwp_file
= open_and_init_dwp_file ();
10575 dwarf2_per_objfile
->dwp_checked
= 1;
10577 return dwarf2_per_objfile
->dwp_file
;
10580 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
10581 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
10582 or in the DWP file for the objfile, referenced by THIS_UNIT.
10583 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
10584 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
10586 This is called, for example, when wanting to read a variable with a
10587 complex location. Therefore we don't want to do file i/o for every call.
10588 Therefore we don't want to look for a DWO file on every call.
10589 Therefore we first see if we've already seen SIGNATURE in a DWP file,
10590 then we check if we've already seen DWO_NAME, and only THEN do we check
10593 The result is a pointer to the dwo_unit object or NULL if we didn't find it
10594 (dwo_id mismatch or couldn't find the DWO/DWP file). */
10596 static struct dwo_unit
*
10597 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
10598 const char *dwo_name
, const char *comp_dir
,
10599 ULONGEST signature
, int is_debug_types
)
10601 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10602 const char *kind
= is_debug_types
? "TU" : "CU";
10603 void **dwo_file_slot
;
10604 struct dwo_file
*dwo_file
;
10605 struct dwp_file
*dwp_file
;
10607 /* First see if there's a DWP file.
10608 If we have a DWP file but didn't find the DWO inside it, don't
10609 look for the original DWO file. It makes gdb behave differently
10610 depending on whether one is debugging in the build tree. */
10612 dwp_file
= get_dwp_file ();
10613 if (dwp_file
!= NULL
)
10615 const struct dwp_hash_table
*dwp_htab
=
10616 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10618 if (dwp_htab
!= NULL
)
10620 struct dwo_unit
*dwo_cutu
=
10621 lookup_dwo_unit_in_dwp (dwp_file
, comp_dir
,
10622 signature
, is_debug_types
);
10624 if (dwo_cutu
!= NULL
)
10626 if (dwarf2_read_debug
)
10628 fprintf_unfiltered (gdb_stdlog
,
10629 "Virtual DWO %s %s found: @%s\n",
10630 kind
, hex_string (signature
),
10631 host_address_to_string (dwo_cutu
));
10639 /* No DWP file, look for the DWO file. */
10641 dwo_file_slot
= lookup_dwo_file_slot (dwo_name
, comp_dir
);
10642 if (*dwo_file_slot
== NULL
)
10644 /* Read in the file and build a table of the CUs/TUs it contains. */
10645 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
10647 /* NOTE: This will be NULL if unable to open the file. */
10648 dwo_file
= *dwo_file_slot
;
10650 if (dwo_file
!= NULL
)
10652 struct dwo_unit
*dwo_cutu
= NULL
;
10654 if (is_debug_types
&& dwo_file
->tus
)
10656 struct dwo_unit find_dwo_cutu
;
10658 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
10659 find_dwo_cutu
.signature
= signature
;
10660 dwo_cutu
= htab_find (dwo_file
->tus
, &find_dwo_cutu
);
10662 else if (!is_debug_types
&& dwo_file
->cu
)
10664 if (signature
== dwo_file
->cu
->signature
)
10665 dwo_cutu
= dwo_file
->cu
;
10668 if (dwo_cutu
!= NULL
)
10670 if (dwarf2_read_debug
)
10672 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
10673 kind
, dwo_name
, hex_string (signature
),
10674 host_address_to_string (dwo_cutu
));
10681 /* We didn't find it. This could mean a dwo_id mismatch, or
10682 someone deleted the DWO/DWP file, or the search path isn't set up
10683 correctly to find the file. */
10685 if (dwarf2_read_debug
)
10687 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
10688 kind
, dwo_name
, hex_string (signature
));
10691 /* This is a warning and not a complaint because it can be caused by
10692 pilot error (e.g., user accidentally deleting the DWO). */
10694 /* Print the name of the DWP file if we looked there, helps the user
10695 better diagnose the problem. */
10696 char *dwp_text
= NULL
;
10697 struct cleanup
*cleanups
;
10699 if (dwp_file
!= NULL
)
10700 dwp_text
= xstrprintf (" [in DWP file %s]", lbasename (dwp_file
->name
));
10701 cleanups
= make_cleanup (xfree
, dwp_text
);
10703 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x"
10704 " [in module %s]"),
10705 kind
, dwo_name
, hex_string (signature
),
10706 dwp_text
!= NULL
? dwp_text
: "",
10707 this_unit
->is_debug_types
? "TU" : "CU",
10708 this_unit
->offset
.sect_off
, objfile_name (objfile
));
10710 do_cleanups (cleanups
);
10715 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
10716 See lookup_dwo_cutu_unit for details. */
10718 static struct dwo_unit
*
10719 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
10720 const char *dwo_name
, const char *comp_dir
,
10721 ULONGEST signature
)
10723 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
10726 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
10727 See lookup_dwo_cutu_unit for details. */
10729 static struct dwo_unit
*
10730 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
10731 const char *dwo_name
, const char *comp_dir
)
10733 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
10736 /* Traversal function for queue_and_load_all_dwo_tus. */
10739 queue_and_load_dwo_tu (void **slot
, void *info
)
10741 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
10742 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
10743 ULONGEST signature
= dwo_unit
->signature
;
10744 struct signatured_type
*sig_type
=
10745 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
10747 if (sig_type
!= NULL
)
10749 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
10751 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
10752 a real dependency of PER_CU on SIG_TYPE. That is detected later
10753 while processing PER_CU. */
10754 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
10755 load_full_type_unit (sig_cu
);
10756 VEC_safe_push (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, sig_cu
);
10762 /* Queue all TUs contained in the DWO of PER_CU to be read in.
10763 The DWO may have the only definition of the type, though it may not be
10764 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
10765 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
10768 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
10770 struct dwo_unit
*dwo_unit
;
10771 struct dwo_file
*dwo_file
;
10773 gdb_assert (!per_cu
->is_debug_types
);
10774 gdb_assert (get_dwp_file () == NULL
);
10775 gdb_assert (per_cu
->cu
!= NULL
);
10777 dwo_unit
= per_cu
->cu
->dwo_unit
;
10778 gdb_assert (dwo_unit
!= NULL
);
10780 dwo_file
= dwo_unit
->dwo_file
;
10781 if (dwo_file
->tus
!= NULL
)
10782 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
10785 /* Free all resources associated with DWO_FILE.
10786 Close the DWO file and munmap the sections.
10787 All memory should be on the objfile obstack. */
10790 free_dwo_file (struct dwo_file
*dwo_file
, struct objfile
*objfile
)
10793 struct dwarf2_section_info
*section
;
10795 /* Note: dbfd is NULL for virtual DWO files. */
10796 gdb_bfd_unref (dwo_file
->dbfd
);
10798 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
10801 /* Wrapper for free_dwo_file for use in cleanups. */
10804 free_dwo_file_cleanup (void *arg
)
10806 struct dwo_file
*dwo_file
= (struct dwo_file
*) arg
;
10807 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10809 free_dwo_file (dwo_file
, objfile
);
10812 /* Traversal function for free_dwo_files. */
10815 free_dwo_file_from_slot (void **slot
, void *info
)
10817 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
10818 struct objfile
*objfile
= (struct objfile
*) info
;
10820 free_dwo_file (dwo_file
, objfile
);
10825 /* Free all resources associated with DWO_FILES. */
10828 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
10830 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
10833 /* Read in various DIEs. */
10835 /* qsort helper for inherit_abstract_dies. */
10838 unsigned_int_compar (const void *ap
, const void *bp
)
10840 unsigned int a
= *(unsigned int *) ap
;
10841 unsigned int b
= *(unsigned int *) bp
;
10843 return (a
> b
) - (b
> a
);
10846 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
10847 Inherit only the children of the DW_AT_abstract_origin DIE not being
10848 already referenced by DW_AT_abstract_origin from the children of the
10852 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
10854 struct die_info
*child_die
;
10855 unsigned die_children_count
;
10856 /* CU offsets which were referenced by children of the current DIE. */
10857 sect_offset
*offsets
;
10858 sect_offset
*offsets_end
, *offsetp
;
10859 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
10860 struct die_info
*origin_die
;
10861 /* Iterator of the ORIGIN_DIE children. */
10862 struct die_info
*origin_child_die
;
10863 struct cleanup
*cleanups
;
10864 struct attribute
*attr
;
10865 struct dwarf2_cu
*origin_cu
;
10866 struct pending
**origin_previous_list_in_scope
;
10868 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
10872 /* Note that following die references may follow to a die in a
10876 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
10878 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
10880 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
10881 origin_cu
->list_in_scope
= cu
->list_in_scope
;
10883 if (die
->tag
!= origin_die
->tag
10884 && !(die
->tag
== DW_TAG_inlined_subroutine
10885 && origin_die
->tag
== DW_TAG_subprogram
))
10886 complaint (&symfile_complaints
,
10887 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
10888 die
->offset
.sect_off
, origin_die
->offset
.sect_off
);
10890 child_die
= die
->child
;
10891 die_children_count
= 0;
10892 while (child_die
&& child_die
->tag
)
10894 child_die
= sibling_die (child_die
);
10895 die_children_count
++;
10897 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
10898 cleanups
= make_cleanup (xfree
, offsets
);
10900 offsets_end
= offsets
;
10901 child_die
= die
->child
;
10902 while (child_die
&& child_die
->tag
)
10904 /* For each CHILD_DIE, find the corresponding child of
10905 ORIGIN_DIE. If there is more than one layer of
10906 DW_AT_abstract_origin, follow them all; there shouldn't be,
10907 but GCC versions at least through 4.4 generate this (GCC PR
10909 struct die_info
*child_origin_die
= child_die
;
10910 struct dwarf2_cu
*child_origin_cu
= cu
;
10914 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
10918 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
10922 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
10923 counterpart may exist. */
10924 if (child_origin_die
!= child_die
)
10926 if (child_die
->tag
!= child_origin_die
->tag
10927 && !(child_die
->tag
== DW_TAG_inlined_subroutine
10928 && child_origin_die
->tag
== DW_TAG_subprogram
))
10929 complaint (&symfile_complaints
,
10930 _("Child DIE 0x%x and its abstract origin 0x%x have "
10931 "different tags"), child_die
->offset
.sect_off
,
10932 child_origin_die
->offset
.sect_off
);
10933 if (child_origin_die
->parent
!= origin_die
)
10934 complaint (&symfile_complaints
,
10935 _("Child DIE 0x%x and its abstract origin 0x%x have "
10936 "different parents"), child_die
->offset
.sect_off
,
10937 child_origin_die
->offset
.sect_off
);
10939 *offsets_end
++ = child_origin_die
->offset
;
10941 child_die
= sibling_die (child_die
);
10943 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
10944 unsigned_int_compar
);
10945 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
10946 if (offsetp
[-1].sect_off
== offsetp
->sect_off
)
10947 complaint (&symfile_complaints
,
10948 _("Multiple children of DIE 0x%x refer "
10949 "to DIE 0x%x as their abstract origin"),
10950 die
->offset
.sect_off
, offsetp
->sect_off
);
10953 origin_child_die
= origin_die
->child
;
10954 while (origin_child_die
&& origin_child_die
->tag
)
10956 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
10957 while (offsetp
< offsets_end
10958 && offsetp
->sect_off
< origin_child_die
->offset
.sect_off
)
10960 if (offsetp
>= offsets_end
10961 || offsetp
->sect_off
> origin_child_die
->offset
.sect_off
)
10963 /* Found that ORIGIN_CHILD_DIE is really not referenced.
10964 Check whether we're already processing ORIGIN_CHILD_DIE.
10965 This can happen with mutually referenced abstract_origins.
10967 if (!origin_child_die
->in_process
)
10968 process_die (origin_child_die
, origin_cu
);
10970 origin_child_die
= sibling_die (origin_child_die
);
10972 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
10974 do_cleanups (cleanups
);
10978 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
10980 struct objfile
*objfile
= cu
->objfile
;
10981 struct context_stack
*new;
10984 struct die_info
*child_die
;
10985 struct attribute
*attr
, *call_line
, *call_file
;
10987 CORE_ADDR baseaddr
;
10988 struct block
*block
;
10989 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
10990 VEC (symbolp
) *template_args
= NULL
;
10991 struct template_symbol
*templ_func
= NULL
;
10995 /* If we do not have call site information, we can't show the
10996 caller of this inlined function. That's too confusing, so
10997 only use the scope for local variables. */
10998 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
10999 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
11000 if (call_line
== NULL
|| call_file
== NULL
)
11002 read_lexical_block_scope (die
, cu
);
11007 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11009 name
= dwarf2_name (die
, cu
);
11011 /* Ignore functions with missing or empty names. These are actually
11012 illegal according to the DWARF standard. */
11015 complaint (&symfile_complaints
,
11016 _("missing name for subprogram DIE at %d"),
11017 die
->offset
.sect_off
);
11021 /* Ignore functions with missing or invalid low and high pc attributes. */
11022 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
11024 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
11025 if (!attr
|| !DW_UNSND (attr
))
11026 complaint (&symfile_complaints
,
11027 _("cannot get low and high bounds "
11028 "for subprogram DIE at %d"),
11029 die
->offset
.sect_off
);
11034 highpc
+= baseaddr
;
11036 /* If we have any template arguments, then we must allocate a
11037 different sort of symbol. */
11038 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
11040 if (child_die
->tag
== DW_TAG_template_type_param
11041 || child_die
->tag
== DW_TAG_template_value_param
)
11043 templ_func
= allocate_template_symbol (objfile
);
11044 templ_func
->base
.is_cplus_template_function
= 1;
11049 new = push_context (0, lowpc
);
11050 new->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
11051 (struct symbol
*) templ_func
);
11053 /* If there is a location expression for DW_AT_frame_base, record
11055 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
11057 dwarf2_symbol_mark_computed (attr
, new->name
, cu
, 1);
11059 cu
->list_in_scope
= &local_symbols
;
11061 if (die
->child
!= NULL
)
11063 child_die
= die
->child
;
11064 while (child_die
&& child_die
->tag
)
11066 if (child_die
->tag
== DW_TAG_template_type_param
11067 || child_die
->tag
== DW_TAG_template_value_param
)
11069 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
11072 VEC_safe_push (symbolp
, template_args
, arg
);
11075 process_die (child_die
, cu
);
11076 child_die
= sibling_die (child_die
);
11080 inherit_abstract_dies (die
, cu
);
11082 /* If we have a DW_AT_specification, we might need to import using
11083 directives from the context of the specification DIE. See the
11084 comment in determine_prefix. */
11085 if (cu
->language
== language_cplus
11086 && dwarf2_attr (die
, DW_AT_specification
, cu
))
11088 struct dwarf2_cu
*spec_cu
= cu
;
11089 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
11093 child_die
= spec_die
->child
;
11094 while (child_die
&& child_die
->tag
)
11096 if (child_die
->tag
== DW_TAG_imported_module
)
11097 process_die (child_die
, spec_cu
);
11098 child_die
= sibling_die (child_die
);
11101 /* In some cases, GCC generates specification DIEs that
11102 themselves contain DW_AT_specification attributes. */
11103 spec_die
= die_specification (spec_die
, &spec_cu
);
11107 new = pop_context ();
11108 /* Make a block for the local symbols within. */
11109 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
11110 lowpc
, highpc
, objfile
);
11112 /* For C++, set the block's scope. */
11113 if ((cu
->language
== language_cplus
|| cu
->language
== language_fortran
)
11114 && cu
->processing_has_namespace_info
)
11115 block_set_scope (block
, determine_prefix (die
, cu
),
11116 &objfile
->objfile_obstack
);
11118 /* If we have address ranges, record them. */
11119 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11121 /* Attach template arguments to function. */
11122 if (! VEC_empty (symbolp
, template_args
))
11124 gdb_assert (templ_func
!= NULL
);
11126 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
11127 templ_func
->template_arguments
11128 = obstack_alloc (&objfile
->objfile_obstack
,
11129 (templ_func
->n_template_arguments
11130 * sizeof (struct symbol
*)));
11131 memcpy (templ_func
->template_arguments
,
11132 VEC_address (symbolp
, template_args
),
11133 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
11134 VEC_free (symbolp
, template_args
);
11137 /* In C++, we can have functions nested inside functions (e.g., when
11138 a function declares a class that has methods). This means that
11139 when we finish processing a function scope, we may need to go
11140 back to building a containing block's symbol lists. */
11141 local_symbols
= new->locals
;
11142 using_directives
= new->using_directives
;
11144 /* If we've finished processing a top-level function, subsequent
11145 symbols go in the file symbol list. */
11146 if (outermost_context_p ())
11147 cu
->list_in_scope
= &file_symbols
;
11150 /* Process all the DIES contained within a lexical block scope. Start
11151 a new scope, process the dies, and then close the scope. */
11154 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11156 struct objfile
*objfile
= cu
->objfile
;
11157 struct context_stack
*new;
11158 CORE_ADDR lowpc
, highpc
;
11159 struct die_info
*child_die
;
11160 CORE_ADDR baseaddr
;
11162 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11164 /* Ignore blocks with missing or invalid low and high pc attributes. */
11165 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
11166 as multiple lexical blocks? Handling children in a sane way would
11167 be nasty. Might be easier to properly extend generic blocks to
11168 describe ranges. */
11169 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
11172 highpc
+= baseaddr
;
11174 push_context (0, lowpc
);
11175 if (die
->child
!= NULL
)
11177 child_die
= die
->child
;
11178 while (child_die
&& child_die
->tag
)
11180 process_die (child_die
, cu
);
11181 child_die
= sibling_die (child_die
);
11184 new = pop_context ();
11186 if (local_symbols
!= NULL
|| using_directives
!= NULL
)
11188 struct block
*block
11189 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
11192 /* Note that recording ranges after traversing children, as we
11193 do here, means that recording a parent's ranges entails
11194 walking across all its children's ranges as they appear in
11195 the address map, which is quadratic behavior.
11197 It would be nicer to record the parent's ranges before
11198 traversing its children, simply overriding whatever you find
11199 there. But since we don't even decide whether to create a
11200 block until after we've traversed its children, that's hard
11202 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11204 local_symbols
= new->locals
;
11205 using_directives
= new->using_directives
;
11208 /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */
11211 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11213 struct objfile
*objfile
= cu
->objfile
;
11214 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11215 CORE_ADDR pc
, baseaddr
;
11216 struct attribute
*attr
;
11217 struct call_site
*call_site
, call_site_local
;
11220 struct die_info
*child_die
;
11222 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11224 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
11227 complaint (&symfile_complaints
,
11228 _("missing DW_AT_low_pc for DW_TAG_GNU_call_site "
11229 "DIE 0x%x [in module %s]"),
11230 die
->offset
.sect_off
, objfile_name (objfile
));
11233 pc
= attr_value_as_address (attr
) + baseaddr
;
11235 if (cu
->call_site_htab
== NULL
)
11236 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
11237 NULL
, &objfile
->objfile_obstack
,
11238 hashtab_obstack_allocate
, NULL
);
11239 call_site_local
.pc
= pc
;
11240 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
11243 complaint (&symfile_complaints
,
11244 _("Duplicate PC %s for DW_TAG_GNU_call_site "
11245 "DIE 0x%x [in module %s]"),
11246 paddress (gdbarch
, pc
), die
->offset
.sect_off
,
11247 objfile_name (objfile
));
11251 /* Count parameters at the caller. */
11254 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
11255 child_die
= sibling_die (child_die
))
11257 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11259 complaint (&symfile_complaints
,
11260 _("Tag %d is not DW_TAG_GNU_call_site_parameter in "
11261 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11262 child_die
->tag
, child_die
->offset
.sect_off
,
11263 objfile_name (objfile
));
11270 call_site
= obstack_alloc (&objfile
->objfile_obstack
,
11271 (sizeof (*call_site
)
11272 + (sizeof (*call_site
->parameter
)
11273 * (nparams
- 1))));
11275 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
11276 call_site
->pc
= pc
;
11278 if (dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
11280 struct die_info
*func_die
;
11282 /* Skip also over DW_TAG_inlined_subroutine. */
11283 for (func_die
= die
->parent
;
11284 func_die
&& func_die
->tag
!= DW_TAG_subprogram
11285 && func_die
->tag
!= DW_TAG_subroutine_type
;
11286 func_die
= func_die
->parent
);
11288 /* DW_AT_GNU_all_call_sites is a superset
11289 of DW_AT_GNU_all_tail_call_sites. */
11291 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
11292 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
11294 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
11295 not complete. But keep CALL_SITE for look ups via call_site_htab,
11296 both the initial caller containing the real return address PC and
11297 the final callee containing the current PC of a chain of tail
11298 calls do not need to have the tail call list complete. But any
11299 function candidate for a virtual tail call frame searched via
11300 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
11301 determined unambiguously. */
11305 struct type
*func_type
= NULL
;
11308 func_type
= get_die_type (func_die
, cu
);
11309 if (func_type
!= NULL
)
11311 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
11313 /* Enlist this call site to the function. */
11314 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
11315 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
11318 complaint (&symfile_complaints
,
11319 _("Cannot find function owning DW_TAG_GNU_call_site "
11320 "DIE 0x%x [in module %s]"),
11321 die
->offset
.sect_off
, objfile_name (objfile
));
11325 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
11327 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
11328 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
11329 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
11330 /* Keep NULL DWARF_BLOCK. */;
11331 else if (attr_form_is_block (attr
))
11333 struct dwarf2_locexpr_baton
*dlbaton
;
11335 dlbaton
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*dlbaton
));
11336 dlbaton
->data
= DW_BLOCK (attr
)->data
;
11337 dlbaton
->size
= DW_BLOCK (attr
)->size
;
11338 dlbaton
->per_cu
= cu
->per_cu
;
11340 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
11342 else if (attr_form_is_ref (attr
))
11344 struct dwarf2_cu
*target_cu
= cu
;
11345 struct die_info
*target_die
;
11347 target_die
= follow_die_ref (die
, attr
, &target_cu
);
11348 gdb_assert (target_cu
->objfile
== objfile
);
11349 if (die_is_declaration (target_die
, target_cu
))
11351 const char *target_physname
= NULL
;
11352 struct attribute
*target_attr
;
11354 /* Prefer the mangled name; otherwise compute the demangled one. */
11355 target_attr
= dwarf2_attr (target_die
, DW_AT_linkage_name
, target_cu
);
11356 if (target_attr
== NULL
)
11357 target_attr
= dwarf2_attr (target_die
, DW_AT_MIPS_linkage_name
,
11359 if (target_attr
!= NULL
&& DW_STRING (target_attr
) != NULL
)
11360 target_physname
= DW_STRING (target_attr
);
11362 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
11363 if (target_physname
== NULL
)
11364 complaint (&symfile_complaints
,
11365 _("DW_AT_GNU_call_site_target target DIE has invalid "
11366 "physname, for referencing DIE 0x%x [in module %s]"),
11367 die
->offset
.sect_off
, objfile_name (objfile
));
11369 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
11375 /* DW_AT_entry_pc should be preferred. */
11376 if (!dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
))
11377 complaint (&symfile_complaints
,
11378 _("DW_AT_GNU_call_site_target target DIE has invalid "
11379 "low pc, for referencing DIE 0x%x [in module %s]"),
11380 die
->offset
.sect_off
, objfile_name (objfile
));
11382 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
+ baseaddr
);
11386 complaint (&symfile_complaints
,
11387 _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither "
11388 "block nor reference, for DIE 0x%x [in module %s]"),
11389 die
->offset
.sect_off
, objfile_name (objfile
));
11391 call_site
->per_cu
= cu
->per_cu
;
11393 for (child_die
= die
->child
;
11394 child_die
&& child_die
->tag
;
11395 child_die
= sibling_die (child_die
))
11397 struct call_site_parameter
*parameter
;
11398 struct attribute
*loc
, *origin
;
11400 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11402 /* Already printed the complaint above. */
11406 gdb_assert (call_site
->parameter_count
< nparams
);
11407 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
11409 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
11410 specifies DW_TAG_formal_parameter. Value of the data assumed for the
11411 register is contained in DW_AT_GNU_call_site_value. */
11413 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
11414 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
11415 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
11417 sect_offset offset
;
11419 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
11420 offset
= dwarf2_get_ref_die_offset (origin
);
11421 if (!offset_in_cu_p (&cu
->header
, offset
))
11423 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
11424 binding can be done only inside one CU. Such referenced DIE
11425 therefore cannot be even moved to DW_TAG_partial_unit. */
11426 complaint (&symfile_complaints
,
11427 _("DW_AT_abstract_origin offset is not in CU for "
11428 "DW_TAG_GNU_call_site child DIE 0x%x "
11430 child_die
->offset
.sect_off
, objfile_name (objfile
));
11433 parameter
->u
.param_offset
.cu_off
= (offset
.sect_off
11434 - cu
->header
.offset
.sect_off
);
11436 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
11438 complaint (&symfile_complaints
,
11439 _("No DW_FORM_block* DW_AT_location for "
11440 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11441 child_die
->offset
.sect_off
, objfile_name (objfile
));
11446 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
11447 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
11448 if (parameter
->u
.dwarf_reg
!= -1)
11449 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
11450 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
11451 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
11452 ¶meter
->u
.fb_offset
))
11453 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
11456 complaint (&symfile_complaints
,
11457 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
11458 "for DW_FORM_block* DW_AT_location is supported for "
11459 "DW_TAG_GNU_call_site child DIE 0x%x "
11461 child_die
->offset
.sect_off
, objfile_name (objfile
));
11466 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
11467 if (!attr_form_is_block (attr
))
11469 complaint (&symfile_complaints
,
11470 _("No DW_FORM_block* DW_AT_GNU_call_site_value for "
11471 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11472 child_die
->offset
.sect_off
, objfile_name (objfile
));
11475 parameter
->value
= DW_BLOCK (attr
)->data
;
11476 parameter
->value_size
= DW_BLOCK (attr
)->size
;
11478 /* Parameters are not pre-cleared by memset above. */
11479 parameter
->data_value
= NULL
;
11480 parameter
->data_value_size
= 0;
11481 call_site
->parameter_count
++;
11483 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
11486 if (!attr_form_is_block (attr
))
11487 complaint (&symfile_complaints
,
11488 _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for "
11489 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11490 child_die
->offset
.sect_off
, objfile_name (objfile
));
11493 parameter
->data_value
= DW_BLOCK (attr
)->data
;
11494 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
11500 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
11501 Return 1 if the attributes are present and valid, otherwise, return 0.
11502 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
11505 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
11506 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
11507 struct partial_symtab
*ranges_pst
)
11509 struct objfile
*objfile
= cu
->objfile
;
11510 struct comp_unit_head
*cu_header
= &cu
->header
;
11511 bfd
*obfd
= objfile
->obfd
;
11512 unsigned int addr_size
= cu_header
->addr_size
;
11513 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
11514 /* Base address selection entry. */
11517 unsigned int dummy
;
11518 const gdb_byte
*buffer
;
11522 CORE_ADDR high
= 0;
11523 CORE_ADDR baseaddr
;
11525 found_base
= cu
->base_known
;
11526 base
= cu
->base_address
;
11528 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
11529 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
11531 complaint (&symfile_complaints
,
11532 _("Offset %d out of bounds for DW_AT_ranges attribute"),
11536 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
11538 /* Read in the largest possible address. */
11539 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
11540 if ((marker
& mask
) == mask
)
11542 /* If we found the largest possible address, then
11543 read the base address. */
11544 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
11545 buffer
+= 2 * addr_size
;
11546 offset
+= 2 * addr_size
;
11552 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11556 CORE_ADDR range_beginning
, range_end
;
11558 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
11559 buffer
+= addr_size
;
11560 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
11561 buffer
+= addr_size
;
11562 offset
+= 2 * addr_size
;
11564 /* An end of list marker is a pair of zero addresses. */
11565 if (range_beginning
== 0 && range_end
== 0)
11566 /* Found the end of list entry. */
11569 /* Each base address selection entry is a pair of 2 values.
11570 The first is the largest possible address, the second is
11571 the base address. Check for a base address here. */
11572 if ((range_beginning
& mask
) == mask
)
11574 /* If we found the largest possible address, then
11575 read the base address. */
11576 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
11583 /* We have no valid base address for the ranges
11585 complaint (&symfile_complaints
,
11586 _("Invalid .debug_ranges data (no base address)"));
11590 if (range_beginning
> range_end
)
11592 /* Inverted range entries are invalid. */
11593 complaint (&symfile_complaints
,
11594 _("Invalid .debug_ranges data (inverted range)"));
11598 /* Empty range entries have no effect. */
11599 if (range_beginning
== range_end
)
11602 range_beginning
+= base
;
11605 /* A not-uncommon case of bad debug info.
11606 Don't pollute the addrmap with bad data. */
11607 if (range_beginning
+ baseaddr
== 0
11608 && !dwarf2_per_objfile
->has_section_at_zero
)
11610 complaint (&symfile_complaints
,
11611 _(".debug_ranges entry has start address of zero"
11612 " [in module %s]"), objfile_name (objfile
));
11616 if (ranges_pst
!= NULL
)
11617 addrmap_set_empty (objfile
->psymtabs_addrmap
,
11618 range_beginning
+ baseaddr
,
11619 range_end
- 1 + baseaddr
,
11622 /* FIXME: This is recording everything as a low-high
11623 segment of consecutive addresses. We should have a
11624 data structure for discontiguous block ranges
11628 low
= range_beginning
;
11634 if (range_beginning
< low
)
11635 low
= range_beginning
;
11636 if (range_end
> high
)
11642 /* If the first entry is an end-of-list marker, the range
11643 describes an empty scope, i.e. no instructions. */
11649 *high_return
= high
;
11653 /* Get low and high pc attributes from a die. Return 1 if the attributes
11654 are present and valid, otherwise, return 0. Return -1 if the range is
11655 discontinuous, i.e. derived from DW_AT_ranges information. */
11658 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
11659 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
11660 struct partial_symtab
*pst
)
11662 struct attribute
*attr
;
11663 struct attribute
*attr_high
;
11665 CORE_ADDR high
= 0;
11668 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
11671 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
11674 low
= attr_value_as_address (attr
);
11675 high
= attr_value_as_address (attr_high
);
11676 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
11680 /* Found high w/o low attribute. */
11683 /* Found consecutive range of addresses. */
11688 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
11691 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
11692 We take advantage of the fact that DW_AT_ranges does not appear
11693 in DW_TAG_compile_unit of DWO files. */
11694 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
11695 unsigned int ranges_offset
= (DW_UNSND (attr
)
11696 + (need_ranges_base
11700 /* Value of the DW_AT_ranges attribute is the offset in the
11701 .debug_ranges section. */
11702 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
11704 /* Found discontinuous range of addresses. */
11709 /* read_partial_die has also the strict LOW < HIGH requirement. */
11713 /* When using the GNU linker, .gnu.linkonce. sections are used to
11714 eliminate duplicate copies of functions and vtables and such.
11715 The linker will arbitrarily choose one and discard the others.
11716 The AT_*_pc values for such functions refer to local labels in
11717 these sections. If the section from that file was discarded, the
11718 labels are not in the output, so the relocs get a value of 0.
11719 If this is a discarded function, mark the pc bounds as invalid,
11720 so that GDB will ignore it. */
11721 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
11730 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
11731 its low and high PC addresses. Do nothing if these addresses could not
11732 be determined. Otherwise, set LOWPC to the low address if it is smaller,
11733 and HIGHPC to the high address if greater than HIGHPC. */
11736 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
11737 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
11738 struct dwarf2_cu
*cu
)
11740 CORE_ADDR low
, high
;
11741 struct die_info
*child
= die
->child
;
11743 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
11745 *lowpc
= min (*lowpc
, low
);
11746 *highpc
= max (*highpc
, high
);
11749 /* If the language does not allow nested subprograms (either inside
11750 subprograms or lexical blocks), we're done. */
11751 if (cu
->language
!= language_ada
)
11754 /* Check all the children of the given DIE. If it contains nested
11755 subprograms, then check their pc bounds. Likewise, we need to
11756 check lexical blocks as well, as they may also contain subprogram
11758 while (child
&& child
->tag
)
11760 if (child
->tag
== DW_TAG_subprogram
11761 || child
->tag
== DW_TAG_lexical_block
)
11762 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
11763 child
= sibling_die (child
);
11767 /* Get the low and high pc's represented by the scope DIE, and store
11768 them in *LOWPC and *HIGHPC. If the correct values can't be
11769 determined, set *LOWPC to -1 and *HIGHPC to 0. */
11772 get_scope_pc_bounds (struct die_info
*die
,
11773 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
11774 struct dwarf2_cu
*cu
)
11776 CORE_ADDR best_low
= (CORE_ADDR
) -1;
11777 CORE_ADDR best_high
= (CORE_ADDR
) 0;
11778 CORE_ADDR current_low
, current_high
;
11780 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
11782 best_low
= current_low
;
11783 best_high
= current_high
;
11787 struct die_info
*child
= die
->child
;
11789 while (child
&& child
->tag
)
11791 switch (child
->tag
) {
11792 case DW_TAG_subprogram
:
11793 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
11795 case DW_TAG_namespace
:
11796 case DW_TAG_module
:
11797 /* FIXME: carlton/2004-01-16: Should we do this for
11798 DW_TAG_class_type/DW_TAG_structure_type, too? I think
11799 that current GCC's always emit the DIEs corresponding
11800 to definitions of methods of classes as children of a
11801 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
11802 the DIEs giving the declarations, which could be
11803 anywhere). But I don't see any reason why the
11804 standards says that they have to be there. */
11805 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
11807 if (current_low
!= ((CORE_ADDR
) -1))
11809 best_low
= min (best_low
, current_low
);
11810 best_high
= max (best_high
, current_high
);
11818 child
= sibling_die (child
);
11823 *highpc
= best_high
;
11826 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
11830 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
11831 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
11833 struct objfile
*objfile
= cu
->objfile
;
11834 struct attribute
*attr
;
11835 struct attribute
*attr_high
;
11837 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
11840 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
11843 CORE_ADDR low
= attr_value_as_address (attr
);
11844 CORE_ADDR high
= attr_value_as_address (attr_high
);
11846 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
11849 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
11853 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
11856 bfd
*obfd
= objfile
->obfd
;
11857 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
11858 We take advantage of the fact that DW_AT_ranges does not appear
11859 in DW_TAG_compile_unit of DWO files. */
11860 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
11862 /* The value of the DW_AT_ranges attribute is the offset of the
11863 address range list in the .debug_ranges section. */
11864 unsigned long offset
= (DW_UNSND (attr
)
11865 + (need_ranges_base
? cu
->ranges_base
: 0));
11866 const gdb_byte
*buffer
;
11868 /* For some target architectures, but not others, the
11869 read_address function sign-extends the addresses it returns.
11870 To recognize base address selection entries, we need a
11872 unsigned int addr_size
= cu
->header
.addr_size
;
11873 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
11875 /* The base address, to which the next pair is relative. Note
11876 that this 'base' is a DWARF concept: most entries in a range
11877 list are relative, to reduce the number of relocs against the
11878 debugging information. This is separate from this function's
11879 'baseaddr' argument, which GDB uses to relocate debugging
11880 information from a shared library based on the address at
11881 which the library was loaded. */
11882 CORE_ADDR base
= cu
->base_address
;
11883 int base_known
= cu
->base_known
;
11885 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
11886 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
11888 complaint (&symfile_complaints
,
11889 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
11893 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
11897 unsigned int bytes_read
;
11898 CORE_ADDR start
, end
;
11900 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
11901 buffer
+= bytes_read
;
11902 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
11903 buffer
+= bytes_read
;
11905 /* Did we find the end of the range list? */
11906 if (start
== 0 && end
== 0)
11909 /* Did we find a base address selection entry? */
11910 else if ((start
& base_select_mask
) == base_select_mask
)
11916 /* We found an ordinary address range. */
11921 complaint (&symfile_complaints
,
11922 _("Invalid .debug_ranges data "
11923 "(no base address)"));
11929 /* Inverted range entries are invalid. */
11930 complaint (&symfile_complaints
,
11931 _("Invalid .debug_ranges data "
11932 "(inverted range)"));
11936 /* Empty range entries have no effect. */
11940 start
+= base
+ baseaddr
;
11941 end
+= base
+ baseaddr
;
11943 /* A not-uncommon case of bad debug info.
11944 Don't pollute the addrmap with bad data. */
11945 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
11947 complaint (&symfile_complaints
,
11948 _(".debug_ranges entry has start address of zero"
11949 " [in module %s]"), objfile_name (objfile
));
11953 record_block_range (block
, start
, end
- 1);
11959 /* Check whether the producer field indicates either of GCC < 4.6, or the
11960 Intel C/C++ compiler, and cache the result in CU. */
11963 check_producer (struct dwarf2_cu
*cu
)
11966 int major
, minor
, release
;
11968 if (cu
->producer
== NULL
)
11970 /* For unknown compilers expect their behavior is DWARF version
11973 GCC started to support .debug_types sections by -gdwarf-4 since
11974 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
11975 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
11976 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
11977 interpreted incorrectly by GDB now - GCC PR debug/48229. */
11979 else if (strncmp (cu
->producer
, "GNU ", strlen ("GNU ")) == 0)
11981 /* Skip any identifier after "GNU " - such as "C++" or "Java". */
11983 cs
= &cu
->producer
[strlen ("GNU ")];
11984 while (*cs
&& !isdigit (*cs
))
11986 if (sscanf (cs
, "%d.%d.%d", &major
, &minor
, &release
) != 3)
11988 /* Not recognized as GCC. */
11992 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
11993 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
11996 else if (strncmp (cu
->producer
, "Intel(R) C", strlen ("Intel(R) C")) == 0)
11997 cu
->producer_is_icc
= 1;
12000 /* For other non-GCC compilers, expect their behavior is DWARF version
12004 cu
->checked_producer
= 1;
12007 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
12008 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
12009 during 4.6.0 experimental. */
12012 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
12014 if (!cu
->checked_producer
)
12015 check_producer (cu
);
12017 return cu
->producer_is_gxx_lt_4_6
;
12020 /* Return the default accessibility type if it is not overriden by
12021 DW_AT_accessibility. */
12023 static enum dwarf_access_attribute
12024 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
12026 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
12028 /* The default DWARF 2 accessibility for members is public, the default
12029 accessibility for inheritance is private. */
12031 if (die
->tag
!= DW_TAG_inheritance
)
12032 return DW_ACCESS_public
;
12034 return DW_ACCESS_private
;
12038 /* DWARF 3+ defines the default accessibility a different way. The same
12039 rules apply now for DW_TAG_inheritance as for the members and it only
12040 depends on the container kind. */
12042 if (die
->parent
->tag
== DW_TAG_class_type
)
12043 return DW_ACCESS_private
;
12045 return DW_ACCESS_public
;
12049 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
12050 offset. If the attribute was not found return 0, otherwise return
12051 1. If it was found but could not properly be handled, set *OFFSET
12055 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
12058 struct attribute
*attr
;
12060 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
12065 /* Note that we do not check for a section offset first here.
12066 This is because DW_AT_data_member_location is new in DWARF 4,
12067 so if we see it, we can assume that a constant form is really
12068 a constant and not a section offset. */
12069 if (attr_form_is_constant (attr
))
12070 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
12071 else if (attr_form_is_section_offset (attr
))
12072 dwarf2_complex_location_expr_complaint ();
12073 else if (attr_form_is_block (attr
))
12074 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12076 dwarf2_complex_location_expr_complaint ();
12084 /* Add an aggregate field to the field list. */
12087 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
12088 struct dwarf2_cu
*cu
)
12090 struct objfile
*objfile
= cu
->objfile
;
12091 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12092 struct nextfield
*new_field
;
12093 struct attribute
*attr
;
12095 const char *fieldname
= "";
12097 /* Allocate a new field list entry and link it in. */
12098 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
12099 make_cleanup (xfree
, new_field
);
12100 memset (new_field
, 0, sizeof (struct nextfield
));
12102 if (die
->tag
== DW_TAG_inheritance
)
12104 new_field
->next
= fip
->baseclasses
;
12105 fip
->baseclasses
= new_field
;
12109 new_field
->next
= fip
->fields
;
12110 fip
->fields
= new_field
;
12114 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
12116 new_field
->accessibility
= DW_UNSND (attr
);
12118 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
12119 if (new_field
->accessibility
!= DW_ACCESS_public
)
12120 fip
->non_public_fields
= 1;
12122 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
12124 new_field
->virtuality
= DW_UNSND (attr
);
12126 new_field
->virtuality
= DW_VIRTUALITY_none
;
12128 fp
= &new_field
->field
;
12130 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
12134 /* Data member other than a C++ static data member. */
12136 /* Get type of field. */
12137 fp
->type
= die_type (die
, cu
);
12139 SET_FIELD_BITPOS (*fp
, 0);
12141 /* Get bit size of field (zero if none). */
12142 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
12145 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
12149 FIELD_BITSIZE (*fp
) = 0;
12152 /* Get bit offset of field. */
12153 if (handle_data_member_location (die
, cu
, &offset
))
12154 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
12155 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
12158 if (gdbarch_bits_big_endian (gdbarch
))
12160 /* For big endian bits, the DW_AT_bit_offset gives the
12161 additional bit offset from the MSB of the containing
12162 anonymous object to the MSB of the field. We don't
12163 have to do anything special since we don't need to
12164 know the size of the anonymous object. */
12165 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
12169 /* For little endian bits, compute the bit offset to the
12170 MSB of the anonymous object, subtract off the number of
12171 bits from the MSB of the field to the MSB of the
12172 object, and then subtract off the number of bits of
12173 the field itself. The result is the bit offset of
12174 the LSB of the field. */
12175 int anonymous_size
;
12176 int bit_offset
= DW_UNSND (attr
);
12178 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12181 /* The size of the anonymous object containing
12182 the bit field is explicit, so use the
12183 indicated size (in bytes). */
12184 anonymous_size
= DW_UNSND (attr
);
12188 /* The size of the anonymous object containing
12189 the bit field must be inferred from the type
12190 attribute of the data member containing the
12192 anonymous_size
= TYPE_LENGTH (fp
->type
);
12194 SET_FIELD_BITPOS (*fp
,
12195 (FIELD_BITPOS (*fp
)
12196 + anonymous_size
* bits_per_byte
12197 - bit_offset
- FIELD_BITSIZE (*fp
)));
12201 /* Get name of field. */
12202 fieldname
= dwarf2_name (die
, cu
);
12203 if (fieldname
== NULL
)
12206 /* The name is already allocated along with this objfile, so we don't
12207 need to duplicate it for the type. */
12208 fp
->name
= fieldname
;
12210 /* Change accessibility for artificial fields (e.g. virtual table
12211 pointer or virtual base class pointer) to private. */
12212 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
12214 FIELD_ARTIFICIAL (*fp
) = 1;
12215 new_field
->accessibility
= DW_ACCESS_private
;
12216 fip
->non_public_fields
= 1;
12219 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
12221 /* C++ static member. */
12223 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
12224 is a declaration, but all versions of G++ as of this writing
12225 (so through at least 3.2.1) incorrectly generate
12226 DW_TAG_variable tags. */
12228 const char *physname
;
12230 /* Get name of field. */
12231 fieldname
= dwarf2_name (die
, cu
);
12232 if (fieldname
== NULL
)
12235 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
12237 /* Only create a symbol if this is an external value.
12238 new_symbol checks this and puts the value in the global symbol
12239 table, which we want. If it is not external, new_symbol
12240 will try to put the value in cu->list_in_scope which is wrong. */
12241 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
12243 /* A static const member, not much different than an enum as far as
12244 we're concerned, except that we can support more types. */
12245 new_symbol (die
, NULL
, cu
);
12248 /* Get physical name. */
12249 physname
= dwarf2_physname (fieldname
, die
, cu
);
12251 /* The name is already allocated along with this objfile, so we don't
12252 need to duplicate it for the type. */
12253 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
12254 FIELD_TYPE (*fp
) = die_type (die
, cu
);
12255 FIELD_NAME (*fp
) = fieldname
;
12257 else if (die
->tag
== DW_TAG_inheritance
)
12261 /* C++ base class field. */
12262 if (handle_data_member_location (die
, cu
, &offset
))
12263 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
12264 FIELD_BITSIZE (*fp
) = 0;
12265 FIELD_TYPE (*fp
) = die_type (die
, cu
);
12266 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
12267 fip
->nbaseclasses
++;
12271 /* Add a typedef defined in the scope of the FIP's class. */
12274 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
12275 struct dwarf2_cu
*cu
)
12277 struct objfile
*objfile
= cu
->objfile
;
12278 struct typedef_field_list
*new_field
;
12279 struct attribute
*attr
;
12280 struct typedef_field
*fp
;
12281 char *fieldname
= "";
12283 /* Allocate a new field list entry and link it in. */
12284 new_field
= xzalloc (sizeof (*new_field
));
12285 make_cleanup (xfree
, new_field
);
12287 gdb_assert (die
->tag
== DW_TAG_typedef
);
12289 fp
= &new_field
->field
;
12291 /* Get name of field. */
12292 fp
->name
= dwarf2_name (die
, cu
);
12293 if (fp
->name
== NULL
)
12296 fp
->type
= read_type_die (die
, cu
);
12298 new_field
->next
= fip
->typedef_field_list
;
12299 fip
->typedef_field_list
= new_field
;
12300 fip
->typedef_field_list_count
++;
12303 /* Create the vector of fields, and attach it to the type. */
12306 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
12307 struct dwarf2_cu
*cu
)
12309 int nfields
= fip
->nfields
;
12311 /* Record the field count, allocate space for the array of fields,
12312 and create blank accessibility bitfields if necessary. */
12313 TYPE_NFIELDS (type
) = nfields
;
12314 TYPE_FIELDS (type
) = (struct field
*)
12315 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
12316 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
12318 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
12320 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12322 TYPE_FIELD_PRIVATE_BITS (type
) =
12323 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12324 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
12326 TYPE_FIELD_PROTECTED_BITS (type
) =
12327 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12328 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
12330 TYPE_FIELD_IGNORE_BITS (type
) =
12331 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12332 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
12335 /* If the type has baseclasses, allocate and clear a bit vector for
12336 TYPE_FIELD_VIRTUAL_BITS. */
12337 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
12339 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
12340 unsigned char *pointer
;
12342 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12343 pointer
= TYPE_ALLOC (type
, num_bytes
);
12344 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
12345 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
12346 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
12349 /* Copy the saved-up fields into the field vector. Start from the head of
12350 the list, adding to the tail of the field array, so that they end up in
12351 the same order in the array in which they were added to the list. */
12352 while (nfields
-- > 0)
12354 struct nextfield
*fieldp
;
12358 fieldp
= fip
->fields
;
12359 fip
->fields
= fieldp
->next
;
12363 fieldp
= fip
->baseclasses
;
12364 fip
->baseclasses
= fieldp
->next
;
12367 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
12368 switch (fieldp
->accessibility
)
12370 case DW_ACCESS_private
:
12371 if (cu
->language
!= language_ada
)
12372 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
12375 case DW_ACCESS_protected
:
12376 if (cu
->language
!= language_ada
)
12377 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
12380 case DW_ACCESS_public
:
12384 /* Unknown accessibility. Complain and treat it as public. */
12386 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
12387 fieldp
->accessibility
);
12391 if (nfields
< fip
->nbaseclasses
)
12393 switch (fieldp
->virtuality
)
12395 case DW_VIRTUALITY_virtual
:
12396 case DW_VIRTUALITY_pure_virtual
:
12397 if (cu
->language
== language_ada
)
12398 error (_("unexpected virtuality in component of Ada type"));
12399 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
12406 /* Return true if this member function is a constructor, false
12410 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
12412 const char *fieldname
;
12413 const char *typename
;
12416 if (die
->parent
== NULL
)
12419 if (die
->parent
->tag
!= DW_TAG_structure_type
12420 && die
->parent
->tag
!= DW_TAG_union_type
12421 && die
->parent
->tag
!= DW_TAG_class_type
)
12424 fieldname
= dwarf2_name (die
, cu
);
12425 typename
= dwarf2_name (die
->parent
, cu
);
12426 if (fieldname
== NULL
|| typename
== NULL
)
12429 len
= strlen (fieldname
);
12430 return (strncmp (fieldname
, typename
, len
) == 0
12431 && (typename
[len
] == '\0' || typename
[len
] == '<'));
12434 /* Add a member function to the proper fieldlist. */
12437 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
12438 struct type
*type
, struct dwarf2_cu
*cu
)
12440 struct objfile
*objfile
= cu
->objfile
;
12441 struct attribute
*attr
;
12442 struct fnfieldlist
*flp
;
12444 struct fn_field
*fnp
;
12445 const char *fieldname
;
12446 struct nextfnfield
*new_fnfield
;
12447 struct type
*this_type
;
12448 enum dwarf_access_attribute accessibility
;
12450 if (cu
->language
== language_ada
)
12451 error (_("unexpected member function in Ada type"));
12453 /* Get name of member function. */
12454 fieldname
= dwarf2_name (die
, cu
);
12455 if (fieldname
== NULL
)
12458 /* Look up member function name in fieldlist. */
12459 for (i
= 0; i
< fip
->nfnfields
; i
++)
12461 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
12465 /* Create new list element if necessary. */
12466 if (i
< fip
->nfnfields
)
12467 flp
= &fip
->fnfieldlists
[i
];
12470 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
12472 fip
->fnfieldlists
= (struct fnfieldlist
*)
12473 xrealloc (fip
->fnfieldlists
,
12474 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
12475 * sizeof (struct fnfieldlist
));
12476 if (fip
->nfnfields
== 0)
12477 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
12479 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
12480 flp
->name
= fieldname
;
12483 i
= fip
->nfnfields
++;
12486 /* Create a new member function field and chain it to the field list
12488 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
12489 make_cleanup (xfree
, new_fnfield
);
12490 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
12491 new_fnfield
->next
= flp
->head
;
12492 flp
->head
= new_fnfield
;
12495 /* Fill in the member function field info. */
12496 fnp
= &new_fnfield
->fnfield
;
12498 /* Delay processing of the physname until later. */
12499 if (cu
->language
== language_cplus
|| cu
->language
== language_java
)
12501 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
12506 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
12507 fnp
->physname
= physname
? physname
: "";
12510 fnp
->type
= alloc_type (objfile
);
12511 this_type
= read_type_die (die
, cu
);
12512 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
12514 int nparams
= TYPE_NFIELDS (this_type
);
12516 /* TYPE is the domain of this method, and THIS_TYPE is the type
12517 of the method itself (TYPE_CODE_METHOD). */
12518 smash_to_method_type (fnp
->type
, type
,
12519 TYPE_TARGET_TYPE (this_type
),
12520 TYPE_FIELDS (this_type
),
12521 TYPE_NFIELDS (this_type
),
12522 TYPE_VARARGS (this_type
));
12524 /* Handle static member functions.
12525 Dwarf2 has no clean way to discern C++ static and non-static
12526 member functions. G++ helps GDB by marking the first
12527 parameter for non-static member functions (which is the this
12528 pointer) as artificial. We obtain this information from
12529 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
12530 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
12531 fnp
->voffset
= VOFFSET_STATIC
;
12534 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
12535 dwarf2_full_name (fieldname
, die
, cu
));
12537 /* Get fcontext from DW_AT_containing_type if present. */
12538 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
12539 fnp
->fcontext
= die_containing_type (die
, cu
);
12541 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
12542 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
12544 /* Get accessibility. */
12545 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
12547 accessibility
= DW_UNSND (attr
);
12549 accessibility
= dwarf2_default_access_attribute (die
, cu
);
12550 switch (accessibility
)
12552 case DW_ACCESS_private
:
12553 fnp
->is_private
= 1;
12555 case DW_ACCESS_protected
:
12556 fnp
->is_protected
= 1;
12560 /* Check for artificial methods. */
12561 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
12562 if (attr
&& DW_UNSND (attr
) != 0)
12563 fnp
->is_artificial
= 1;
12565 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
12567 /* Get index in virtual function table if it is a virtual member
12568 function. For older versions of GCC, this is an offset in the
12569 appropriate virtual table, as specified by DW_AT_containing_type.
12570 For everyone else, it is an expression to be evaluated relative
12571 to the object address. */
12573 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
12576 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
12578 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
12580 /* Old-style GCC. */
12581 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
12583 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
12584 || (DW_BLOCK (attr
)->size
> 1
12585 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
12586 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
12588 struct dwarf_block blk
;
12591 offset
= (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
12593 blk
.size
= DW_BLOCK (attr
)->size
- offset
;
12594 blk
.data
= DW_BLOCK (attr
)->data
+ offset
;
12595 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12596 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
12597 dwarf2_complex_location_expr_complaint ();
12599 fnp
->voffset
/= cu
->header
.addr_size
;
12603 dwarf2_complex_location_expr_complaint ();
12605 if (!fnp
->fcontext
)
12606 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
12608 else if (attr_form_is_section_offset (attr
))
12610 dwarf2_complex_location_expr_complaint ();
12614 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
12620 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
12621 if (attr
&& DW_UNSND (attr
))
12623 /* GCC does this, as of 2008-08-25; PR debug/37237. */
12624 complaint (&symfile_complaints
,
12625 _("Member function \"%s\" (offset %d) is virtual "
12626 "but the vtable offset is not specified"),
12627 fieldname
, die
->offset
.sect_off
);
12628 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12629 TYPE_CPLUS_DYNAMIC (type
) = 1;
12634 /* Create the vector of member function fields, and attach it to the type. */
12637 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
12638 struct dwarf2_cu
*cu
)
12640 struct fnfieldlist
*flp
;
12643 if (cu
->language
== language_ada
)
12644 error (_("unexpected member functions in Ada type"));
12646 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12647 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
12648 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
12650 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
12652 struct nextfnfield
*nfp
= flp
->head
;
12653 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
12656 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
12657 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
12658 fn_flp
->fn_fields
= (struct fn_field
*)
12659 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
12660 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
12661 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
12664 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
12667 /* Returns non-zero if NAME is the name of a vtable member in CU's
12668 language, zero otherwise. */
12670 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
12672 static const char vptr
[] = "_vptr";
12673 static const char vtable
[] = "vtable";
12675 /* Look for the C++ and Java forms of the vtable. */
12676 if ((cu
->language
== language_java
12677 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
12678 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
12679 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
12685 /* GCC outputs unnamed structures that are really pointers to member
12686 functions, with the ABI-specified layout. If TYPE describes
12687 such a structure, smash it into a member function type.
12689 GCC shouldn't do this; it should just output pointer to member DIEs.
12690 This is GCC PR debug/28767. */
12693 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
12695 struct type
*pfn_type
, *domain_type
, *new_type
;
12697 /* Check for a structure with no name and two children. */
12698 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
12701 /* Check for __pfn and __delta members. */
12702 if (TYPE_FIELD_NAME (type
, 0) == NULL
12703 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
12704 || TYPE_FIELD_NAME (type
, 1) == NULL
12705 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
12708 /* Find the type of the method. */
12709 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
12710 if (pfn_type
== NULL
12711 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
12712 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
12715 /* Look for the "this" argument. */
12716 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
12717 if (TYPE_NFIELDS (pfn_type
) == 0
12718 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
12719 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
12722 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
12723 new_type
= alloc_type (objfile
);
12724 smash_to_method_type (new_type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
12725 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
12726 TYPE_VARARGS (pfn_type
));
12727 smash_to_methodptr_type (type
, new_type
);
12730 /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler
12734 producer_is_icc (struct dwarf2_cu
*cu
)
12736 if (!cu
->checked_producer
)
12737 check_producer (cu
);
12739 return cu
->producer_is_icc
;
12742 /* Called when we find the DIE that starts a structure or union scope
12743 (definition) to create a type for the structure or union. Fill in
12744 the type's name and general properties; the members will not be
12745 processed until process_structure_scope. A symbol table entry for
12746 the type will also not be done until process_structure_scope (assuming
12747 the type has a name).
12749 NOTE: we need to call these functions regardless of whether or not the
12750 DIE has a DW_AT_name attribute, since it might be an anonymous
12751 structure or union. This gets the type entered into our set of
12752 user defined types. */
12754 static struct type
*
12755 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12757 struct objfile
*objfile
= cu
->objfile
;
12759 struct attribute
*attr
;
12762 /* If the definition of this type lives in .debug_types, read that type.
12763 Don't follow DW_AT_specification though, that will take us back up
12764 the chain and we want to go down. */
12765 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
12768 type
= get_DW_AT_signature_type (die
, attr
, cu
);
12770 /* The type's CU may not be the same as CU.
12771 Ensure TYPE is recorded with CU in die_type_hash. */
12772 return set_die_type (die
, type
, cu
);
12775 type
= alloc_type (objfile
);
12776 INIT_CPLUS_SPECIFIC (type
);
12778 name
= dwarf2_name (die
, cu
);
12781 if (cu
->language
== language_cplus
12782 || cu
->language
== language_java
)
12784 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
12786 /* dwarf2_full_name might have already finished building the DIE's
12787 type. If so, there is no need to continue. */
12788 if (get_die_type (die
, cu
) != NULL
)
12789 return get_die_type (die
, cu
);
12791 TYPE_TAG_NAME (type
) = full_name
;
12792 if (die
->tag
== DW_TAG_structure_type
12793 || die
->tag
== DW_TAG_class_type
)
12794 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
12798 /* The name is already allocated along with this objfile, so
12799 we don't need to duplicate it for the type. */
12800 TYPE_TAG_NAME (type
) = name
;
12801 if (die
->tag
== DW_TAG_class_type
)
12802 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
12806 if (die
->tag
== DW_TAG_structure_type
)
12808 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
12810 else if (die
->tag
== DW_TAG_union_type
)
12812 TYPE_CODE (type
) = TYPE_CODE_UNION
;
12816 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
12819 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
12820 TYPE_DECLARED_CLASS (type
) = 1;
12822 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12825 TYPE_LENGTH (type
) = DW_UNSND (attr
);
12829 TYPE_LENGTH (type
) = 0;
12832 if (producer_is_icc (cu
))
12834 /* ICC does not output the required DW_AT_declaration
12835 on incomplete types, but gives them a size of zero. */
12838 TYPE_STUB_SUPPORTED (type
) = 1;
12840 if (die_is_declaration (die
, cu
))
12841 TYPE_STUB (type
) = 1;
12842 else if (attr
== NULL
&& die
->child
== NULL
12843 && producer_is_realview (cu
->producer
))
12844 /* RealView does not output the required DW_AT_declaration
12845 on incomplete types. */
12846 TYPE_STUB (type
) = 1;
12848 /* We need to add the type field to the die immediately so we don't
12849 infinitely recurse when dealing with pointers to the structure
12850 type within the structure itself. */
12851 set_die_type (die
, type
, cu
);
12853 /* set_die_type should be already done. */
12854 set_descriptive_type (type
, die
, cu
);
12859 /* Finish creating a structure or union type, including filling in
12860 its members and creating a symbol for it. */
12863 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
12865 struct objfile
*objfile
= cu
->objfile
;
12866 struct die_info
*child_die
= die
->child
;
12869 type
= get_die_type (die
, cu
);
12871 type
= read_structure_type (die
, cu
);
12873 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
12875 struct field_info fi
;
12876 struct die_info
*child_die
;
12877 VEC (symbolp
) *template_args
= NULL
;
12878 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
12880 memset (&fi
, 0, sizeof (struct field_info
));
12882 child_die
= die
->child
;
12884 while (child_die
&& child_die
->tag
)
12886 if (child_die
->tag
== DW_TAG_member
12887 || child_die
->tag
== DW_TAG_variable
)
12889 /* NOTE: carlton/2002-11-05: A C++ static data member
12890 should be a DW_TAG_member that is a declaration, but
12891 all versions of G++ as of this writing (so through at
12892 least 3.2.1) incorrectly generate DW_TAG_variable
12893 tags for them instead. */
12894 dwarf2_add_field (&fi
, child_die
, cu
);
12896 else if (child_die
->tag
== DW_TAG_subprogram
)
12898 /* C++ member function. */
12899 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
12901 else if (child_die
->tag
== DW_TAG_inheritance
)
12903 /* C++ base class field. */
12904 dwarf2_add_field (&fi
, child_die
, cu
);
12906 else if (child_die
->tag
== DW_TAG_typedef
)
12907 dwarf2_add_typedef (&fi
, child_die
, cu
);
12908 else if (child_die
->tag
== DW_TAG_template_type_param
12909 || child_die
->tag
== DW_TAG_template_value_param
)
12911 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
12914 VEC_safe_push (symbolp
, template_args
, arg
);
12917 child_die
= sibling_die (child_die
);
12920 /* Attach template arguments to type. */
12921 if (! VEC_empty (symbolp
, template_args
))
12923 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12924 TYPE_N_TEMPLATE_ARGUMENTS (type
)
12925 = VEC_length (symbolp
, template_args
);
12926 TYPE_TEMPLATE_ARGUMENTS (type
)
12927 = obstack_alloc (&objfile
->objfile_obstack
,
12928 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
12929 * sizeof (struct symbol
*)));
12930 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
12931 VEC_address (symbolp
, template_args
),
12932 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
12933 * sizeof (struct symbol
*)));
12934 VEC_free (symbolp
, template_args
);
12937 /* Attach fields and member functions to the type. */
12939 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
12942 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
12944 /* Get the type which refers to the base class (possibly this
12945 class itself) which contains the vtable pointer for the current
12946 class from the DW_AT_containing_type attribute. This use of
12947 DW_AT_containing_type is a GNU extension. */
12949 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
12951 struct type
*t
= die_containing_type (die
, cu
);
12953 TYPE_VPTR_BASETYPE (type
) = t
;
12958 /* Our own class provides vtbl ptr. */
12959 for (i
= TYPE_NFIELDS (t
) - 1;
12960 i
>= TYPE_N_BASECLASSES (t
);
12963 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
12965 if (is_vtable_name (fieldname
, cu
))
12967 TYPE_VPTR_FIELDNO (type
) = i
;
12972 /* Complain if virtual function table field not found. */
12973 if (i
< TYPE_N_BASECLASSES (t
))
12974 complaint (&symfile_complaints
,
12975 _("virtual function table pointer "
12976 "not found when defining class '%s'"),
12977 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
12982 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
12985 else if (cu
->producer
12986 && strncmp (cu
->producer
,
12987 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
12989 /* The IBM XLC compiler does not provide direct indication
12990 of the containing type, but the vtable pointer is
12991 always named __vfp. */
12995 for (i
= TYPE_NFIELDS (type
) - 1;
12996 i
>= TYPE_N_BASECLASSES (type
);
12999 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
13001 TYPE_VPTR_FIELDNO (type
) = i
;
13002 TYPE_VPTR_BASETYPE (type
) = type
;
13009 /* Copy fi.typedef_field_list linked list elements content into the
13010 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
13011 if (fi
.typedef_field_list
)
13013 int i
= fi
.typedef_field_list_count
;
13015 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13016 TYPE_TYPEDEF_FIELD_ARRAY (type
)
13017 = TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
);
13018 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
13020 /* Reverse the list order to keep the debug info elements order. */
13023 struct typedef_field
*dest
, *src
;
13025 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
13026 src
= &fi
.typedef_field_list
->field
;
13027 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
13032 do_cleanups (back_to
);
13034 if (HAVE_CPLUS_STRUCT (type
))
13035 TYPE_CPLUS_REALLY_JAVA (type
) = cu
->language
== language_java
;
13038 quirk_gcc_member_function_pointer (type
, objfile
);
13040 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
13041 snapshots) has been known to create a die giving a declaration
13042 for a class that has, as a child, a die giving a definition for a
13043 nested class. So we have to process our children even if the
13044 current die is a declaration. Normally, of course, a declaration
13045 won't have any children at all. */
13047 while (child_die
!= NULL
&& child_die
->tag
)
13049 if (child_die
->tag
== DW_TAG_member
13050 || child_die
->tag
== DW_TAG_variable
13051 || child_die
->tag
== DW_TAG_inheritance
13052 || child_die
->tag
== DW_TAG_template_value_param
13053 || child_die
->tag
== DW_TAG_template_type_param
)
13058 process_die (child_die
, cu
);
13060 child_die
= sibling_die (child_die
);
13063 /* Do not consider external references. According to the DWARF standard,
13064 these DIEs are identified by the fact that they have no byte_size
13065 attribute, and a declaration attribute. */
13066 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
13067 || !die_is_declaration (die
, cu
))
13068 new_symbol (die
, type
, cu
);
13071 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
13072 update TYPE using some information only available in DIE's children. */
13075 update_enumeration_type_from_children (struct die_info
*die
,
13077 struct dwarf2_cu
*cu
)
13079 struct obstack obstack
;
13080 struct die_info
*child_die
= die
->child
;
13081 int unsigned_enum
= 1;
13084 struct cleanup
*old_chain
;
13086 obstack_init (&obstack
);
13087 old_chain
= make_cleanup_obstack_free (&obstack
);
13089 while (child_die
!= NULL
&& child_die
->tag
)
13091 struct attribute
*attr
;
13093 const gdb_byte
*bytes
;
13094 struct dwarf2_locexpr_baton
*baton
;
13096 if (child_die
->tag
!= DW_TAG_enumerator
)
13099 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
13103 name
= dwarf2_name (child_die
, cu
);
13105 name
= "<anonymous enumerator>";
13107 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
13108 &value
, &bytes
, &baton
);
13114 else if ((mask
& value
) != 0)
13119 /* If we already know that the enum type is neither unsigned, nor
13120 a flag type, no need to look at the rest of the enumerates. */
13121 if (!unsigned_enum
&& !flag_enum
)
13123 child_die
= sibling_die (child_die
);
13127 TYPE_UNSIGNED (type
) = 1;
13129 TYPE_FLAG_ENUM (type
) = 1;
13131 do_cleanups (old_chain
);
13134 /* Given a DW_AT_enumeration_type die, set its type. We do not
13135 complete the type's fields yet, or create any symbols. */
13137 static struct type
*
13138 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13140 struct objfile
*objfile
= cu
->objfile
;
13142 struct attribute
*attr
;
13145 /* If the definition of this type lives in .debug_types, read that type.
13146 Don't follow DW_AT_specification though, that will take us back up
13147 the chain and we want to go down. */
13148 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
13151 type
= get_DW_AT_signature_type (die
, attr
, cu
);
13153 /* The type's CU may not be the same as CU.
13154 Ensure TYPE is recorded with CU in die_type_hash. */
13155 return set_die_type (die
, type
, cu
);
13158 type
= alloc_type (objfile
);
13160 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
13161 name
= dwarf2_full_name (NULL
, die
, cu
);
13163 TYPE_TAG_NAME (type
) = name
;
13165 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
13168 struct type
*underlying_type
= die_type (die
, cu
);
13170 TYPE_TARGET_TYPE (type
) = underlying_type
;
13173 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13176 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13180 TYPE_LENGTH (type
) = 0;
13183 /* The enumeration DIE can be incomplete. In Ada, any type can be
13184 declared as private in the package spec, and then defined only
13185 inside the package body. Such types are known as Taft Amendment
13186 Types. When another package uses such a type, an incomplete DIE
13187 may be generated by the compiler. */
13188 if (die_is_declaration (die
, cu
))
13189 TYPE_STUB (type
) = 1;
13191 /* Finish the creation of this type by using the enum's children.
13192 We must call this even when the underlying type has been provided
13193 so that we can determine if we're looking at a "flag" enum. */
13194 update_enumeration_type_from_children (die
, type
, cu
);
13196 /* If this type has an underlying type that is not a stub, then we
13197 may use its attributes. We always use the "unsigned" attribute
13198 in this situation, because ordinarily we guess whether the type
13199 is unsigned -- but the guess can be wrong and the underlying type
13200 can tell us the reality. However, we defer to a local size
13201 attribute if one exists, because this lets the compiler override
13202 the underlying type if needed. */
13203 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
13205 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
13206 if (TYPE_LENGTH (type
) == 0)
13207 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
13210 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
13212 return set_die_type (die
, type
, cu
);
13215 /* Given a pointer to a die which begins an enumeration, process all
13216 the dies that define the members of the enumeration, and create the
13217 symbol for the enumeration type.
13219 NOTE: We reverse the order of the element list. */
13222 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13224 struct type
*this_type
;
13226 this_type
= get_die_type (die
, cu
);
13227 if (this_type
== NULL
)
13228 this_type
= read_enumeration_type (die
, cu
);
13230 if (die
->child
!= NULL
)
13232 struct die_info
*child_die
;
13233 struct symbol
*sym
;
13234 struct field
*fields
= NULL
;
13235 int num_fields
= 0;
13238 child_die
= die
->child
;
13239 while (child_die
&& child_die
->tag
)
13241 if (child_die
->tag
!= DW_TAG_enumerator
)
13243 process_die (child_die
, cu
);
13247 name
= dwarf2_name (child_die
, cu
);
13250 sym
= new_symbol (child_die
, this_type
, cu
);
13252 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
13254 fields
= (struct field
*)
13256 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
13257 * sizeof (struct field
));
13260 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
13261 FIELD_TYPE (fields
[num_fields
]) = NULL
;
13262 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
13263 FIELD_BITSIZE (fields
[num_fields
]) = 0;
13269 child_die
= sibling_die (child_die
);
13274 TYPE_NFIELDS (this_type
) = num_fields
;
13275 TYPE_FIELDS (this_type
) = (struct field
*)
13276 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
13277 memcpy (TYPE_FIELDS (this_type
), fields
,
13278 sizeof (struct field
) * num_fields
);
13283 /* If we are reading an enum from a .debug_types unit, and the enum
13284 is a declaration, and the enum is not the signatured type in the
13285 unit, then we do not want to add a symbol for it. Adding a
13286 symbol would in some cases obscure the true definition of the
13287 enum, giving users an incomplete type when the definition is
13288 actually available. Note that we do not want to do this for all
13289 enums which are just declarations, because C++0x allows forward
13290 enum declarations. */
13291 if (cu
->per_cu
->is_debug_types
13292 && die_is_declaration (die
, cu
))
13294 struct signatured_type
*sig_type
;
13296 sig_type
= (struct signatured_type
*) cu
->per_cu
;
13297 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
13298 if (sig_type
->type_offset_in_section
.sect_off
!= die
->offset
.sect_off
)
13302 new_symbol (die
, this_type
, cu
);
13305 /* Extract all information from a DW_TAG_array_type DIE and put it in
13306 the DIE's type field. For now, this only handles one dimensional
13309 static struct type
*
13310 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13312 struct objfile
*objfile
= cu
->objfile
;
13313 struct die_info
*child_die
;
13315 struct type
*element_type
, *range_type
, *index_type
;
13316 struct type
**range_types
= NULL
;
13317 struct attribute
*attr
;
13319 struct cleanup
*back_to
;
13321 unsigned int bit_stride
= 0;
13323 element_type
= die_type (die
, cu
);
13325 /* The die_type call above may have already set the type for this DIE. */
13326 type
= get_die_type (die
, cu
);
13330 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
13332 bit_stride
= DW_UNSND (attr
) * 8;
13334 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
13336 bit_stride
= DW_UNSND (attr
);
13338 /* Irix 6.2 native cc creates array types without children for
13339 arrays with unspecified length. */
13340 if (die
->child
== NULL
)
13342 index_type
= objfile_type (objfile
)->builtin_int
;
13343 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
13344 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
13346 return set_die_type (die
, type
, cu
);
13349 back_to
= make_cleanup (null_cleanup
, NULL
);
13350 child_die
= die
->child
;
13351 while (child_die
&& child_die
->tag
)
13353 if (child_die
->tag
== DW_TAG_subrange_type
)
13355 struct type
*child_type
= read_type_die (child_die
, cu
);
13357 if (child_type
!= NULL
)
13359 /* The range type was succesfully read. Save it for the
13360 array type creation. */
13361 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
13363 range_types
= (struct type
**)
13364 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
13365 * sizeof (struct type
*));
13367 make_cleanup (free_current_contents
, &range_types
);
13369 range_types
[ndim
++] = child_type
;
13372 child_die
= sibling_die (child_die
);
13375 /* Dwarf2 dimensions are output from left to right, create the
13376 necessary array types in backwards order. */
13378 type
= element_type
;
13380 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
13385 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
13391 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
13395 /* Understand Dwarf2 support for vector types (like they occur on
13396 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
13397 array type. This is not part of the Dwarf2/3 standard yet, but a
13398 custom vendor extension. The main difference between a regular
13399 array and the vector variant is that vectors are passed by value
13401 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
13403 make_vector_type (type
);
13405 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
13406 implementation may choose to implement triple vectors using this
13408 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13411 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
13412 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13414 complaint (&symfile_complaints
,
13415 _("DW_AT_byte_size for array type smaller "
13416 "than the total size of elements"));
13419 name
= dwarf2_name (die
, cu
);
13421 TYPE_NAME (type
) = name
;
13423 /* Install the type in the die. */
13424 set_die_type (die
, type
, cu
);
13426 /* set_die_type should be already done. */
13427 set_descriptive_type (type
, die
, cu
);
13429 do_cleanups (back_to
);
13434 static enum dwarf_array_dim_ordering
13435 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
13437 struct attribute
*attr
;
13439 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
13441 if (attr
) return DW_SND (attr
);
13443 /* GNU F77 is a special case, as at 08/2004 array type info is the
13444 opposite order to the dwarf2 specification, but data is still
13445 laid out as per normal fortran.
13447 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
13448 version checking. */
13450 if (cu
->language
== language_fortran
13451 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
13453 return DW_ORD_row_major
;
13456 switch (cu
->language_defn
->la_array_ordering
)
13458 case array_column_major
:
13459 return DW_ORD_col_major
;
13460 case array_row_major
:
13462 return DW_ORD_row_major
;
13466 /* Extract all information from a DW_TAG_set_type DIE and put it in
13467 the DIE's type field. */
13469 static struct type
*
13470 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13472 struct type
*domain_type
, *set_type
;
13473 struct attribute
*attr
;
13475 domain_type
= die_type (die
, cu
);
13477 /* The die_type call above may have already set the type for this DIE. */
13478 set_type
= get_die_type (die
, cu
);
13482 set_type
= create_set_type (NULL
, domain_type
);
13484 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13486 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
13488 return set_die_type (die
, set_type
, cu
);
13491 /* A helper for read_common_block that creates a locexpr baton.
13492 SYM is the symbol which we are marking as computed.
13493 COMMON_DIE is the DIE for the common block.
13494 COMMON_LOC is the location expression attribute for the common
13496 MEMBER_LOC is the location expression attribute for the particular
13497 member of the common block that we are processing.
13498 CU is the CU from which the above come. */
13501 mark_common_block_symbol_computed (struct symbol
*sym
,
13502 struct die_info
*common_die
,
13503 struct attribute
*common_loc
,
13504 struct attribute
*member_loc
,
13505 struct dwarf2_cu
*cu
)
13507 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13508 struct dwarf2_locexpr_baton
*baton
;
13510 unsigned int cu_off
;
13511 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
13512 LONGEST offset
= 0;
13514 gdb_assert (common_loc
&& member_loc
);
13515 gdb_assert (attr_form_is_block (common_loc
));
13516 gdb_assert (attr_form_is_block (member_loc
)
13517 || attr_form_is_constant (member_loc
));
13519 baton
= obstack_alloc (&objfile
->objfile_obstack
,
13520 sizeof (struct dwarf2_locexpr_baton
));
13521 baton
->per_cu
= cu
->per_cu
;
13522 gdb_assert (baton
->per_cu
);
13524 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
13526 if (attr_form_is_constant (member_loc
))
13528 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
13529 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
13532 baton
->size
+= DW_BLOCK (member_loc
)->size
;
13534 ptr
= obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
13537 *ptr
++ = DW_OP_call4
;
13538 cu_off
= common_die
->offset
.sect_off
- cu
->per_cu
->offset
.sect_off
;
13539 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
13542 if (attr_form_is_constant (member_loc
))
13544 *ptr
++ = DW_OP_addr
;
13545 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
13546 ptr
+= cu
->header
.addr_size
;
13550 /* We have to copy the data here, because DW_OP_call4 will only
13551 use a DW_AT_location attribute. */
13552 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
13553 ptr
+= DW_BLOCK (member_loc
)->size
;
13556 *ptr
++ = DW_OP_plus
;
13557 gdb_assert (ptr
- baton
->data
== baton
->size
);
13559 SYMBOL_LOCATION_BATON (sym
) = baton
;
13560 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
13563 /* Create appropriate locally-scoped variables for all the
13564 DW_TAG_common_block entries. Also create a struct common_block
13565 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
13566 is used to sepate the common blocks name namespace from regular
13570 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
13572 struct attribute
*attr
;
13574 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
13577 /* Support the .debug_loc offsets. */
13578 if (attr_form_is_block (attr
))
13582 else if (attr_form_is_section_offset (attr
))
13584 dwarf2_complex_location_expr_complaint ();
13589 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
13590 "common block member");
13595 if (die
->child
!= NULL
)
13597 struct objfile
*objfile
= cu
->objfile
;
13598 struct die_info
*child_die
;
13599 size_t n_entries
= 0, size
;
13600 struct common_block
*common_block
;
13601 struct symbol
*sym
;
13603 for (child_die
= die
->child
;
13604 child_die
&& child_die
->tag
;
13605 child_die
= sibling_die (child_die
))
13608 size
= (sizeof (struct common_block
)
13609 + (n_entries
- 1) * sizeof (struct symbol
*));
13610 common_block
= obstack_alloc (&objfile
->objfile_obstack
, size
);
13611 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
13612 common_block
->n_entries
= 0;
13614 for (child_die
= die
->child
;
13615 child_die
&& child_die
->tag
;
13616 child_die
= sibling_die (child_die
))
13618 /* Create the symbol in the DW_TAG_common_block block in the current
13620 sym
= new_symbol (child_die
, NULL
, cu
);
13623 struct attribute
*member_loc
;
13625 common_block
->contents
[common_block
->n_entries
++] = sym
;
13627 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
13631 /* GDB has handled this for a long time, but it is
13632 not specified by DWARF. It seems to have been
13633 emitted by gfortran at least as recently as:
13634 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
13635 complaint (&symfile_complaints
,
13636 _("Variable in common block has "
13637 "DW_AT_data_member_location "
13638 "- DIE at 0x%x [in module %s]"),
13639 child_die
->offset
.sect_off
,
13640 objfile_name (cu
->objfile
));
13642 if (attr_form_is_section_offset (member_loc
))
13643 dwarf2_complex_location_expr_complaint ();
13644 else if (attr_form_is_constant (member_loc
)
13645 || attr_form_is_block (member_loc
))
13648 mark_common_block_symbol_computed (sym
, die
, attr
,
13652 dwarf2_complex_location_expr_complaint ();
13657 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
13658 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
13662 /* Create a type for a C++ namespace. */
13664 static struct type
*
13665 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13667 struct objfile
*objfile
= cu
->objfile
;
13668 const char *previous_prefix
, *name
;
13672 /* For extensions, reuse the type of the original namespace. */
13673 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
13675 struct die_info
*ext_die
;
13676 struct dwarf2_cu
*ext_cu
= cu
;
13678 ext_die
= dwarf2_extension (die
, &ext_cu
);
13679 type
= read_type_die (ext_die
, ext_cu
);
13681 /* EXT_CU may not be the same as CU.
13682 Ensure TYPE is recorded with CU in die_type_hash. */
13683 return set_die_type (die
, type
, cu
);
13686 name
= namespace_name (die
, &is_anonymous
, cu
);
13688 /* Now build the name of the current namespace. */
13690 previous_prefix
= determine_prefix (die
, cu
);
13691 if (previous_prefix
[0] != '\0')
13692 name
= typename_concat (&objfile
->objfile_obstack
,
13693 previous_prefix
, name
, 0, cu
);
13695 /* Create the type. */
13696 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
13698 TYPE_NAME (type
) = name
;
13699 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
13701 return set_die_type (die
, type
, cu
);
13704 /* Read a C++ namespace. */
13707 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
13709 struct objfile
*objfile
= cu
->objfile
;
13712 /* Add a symbol associated to this if we haven't seen the namespace
13713 before. Also, add a using directive if it's an anonymous
13716 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
13720 type
= read_type_die (die
, cu
);
13721 new_symbol (die
, type
, cu
);
13723 namespace_name (die
, &is_anonymous
, cu
);
13726 const char *previous_prefix
= determine_prefix (die
, cu
);
13728 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
), NULL
,
13729 NULL
, NULL
, 0, &objfile
->objfile_obstack
);
13733 if (die
->child
!= NULL
)
13735 struct die_info
*child_die
= die
->child
;
13737 while (child_die
&& child_die
->tag
)
13739 process_die (child_die
, cu
);
13740 child_die
= sibling_die (child_die
);
13745 /* Read a Fortran module as type. This DIE can be only a declaration used for
13746 imported module. Still we need that type as local Fortran "use ... only"
13747 declaration imports depend on the created type in determine_prefix. */
13749 static struct type
*
13750 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13752 struct objfile
*objfile
= cu
->objfile
;
13753 const char *module_name
;
13756 module_name
= dwarf2_name (die
, cu
);
13758 complaint (&symfile_complaints
,
13759 _("DW_TAG_module has no name, offset 0x%x"),
13760 die
->offset
.sect_off
);
13761 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
13763 /* determine_prefix uses TYPE_TAG_NAME. */
13764 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
13766 return set_die_type (die
, type
, cu
);
13769 /* Read a Fortran module. */
13772 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
13774 struct die_info
*child_die
= die
->child
;
13777 type
= read_type_die (die
, cu
);
13778 new_symbol (die
, type
, cu
);
13780 while (child_die
&& child_die
->tag
)
13782 process_die (child_die
, cu
);
13783 child_die
= sibling_die (child_die
);
13787 /* Return the name of the namespace represented by DIE. Set
13788 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
13791 static const char *
13792 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
13794 struct die_info
*current_die
;
13795 const char *name
= NULL
;
13797 /* Loop through the extensions until we find a name. */
13799 for (current_die
= die
;
13800 current_die
!= NULL
;
13801 current_die
= dwarf2_extension (die
, &cu
))
13803 name
= dwarf2_name (current_die
, cu
);
13808 /* Is it an anonymous namespace? */
13810 *is_anonymous
= (name
== NULL
);
13812 name
= CP_ANONYMOUS_NAMESPACE_STR
;
13817 /* Extract all information from a DW_TAG_pointer_type DIE and add to
13818 the user defined type vector. */
13820 static struct type
*
13821 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13823 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
13824 struct comp_unit_head
*cu_header
= &cu
->header
;
13826 struct attribute
*attr_byte_size
;
13827 struct attribute
*attr_address_class
;
13828 int byte_size
, addr_class
;
13829 struct type
*target_type
;
13831 target_type
= die_type (die
, cu
);
13833 /* The die_type call above may have already set the type for this DIE. */
13834 type
= get_die_type (die
, cu
);
13838 type
= lookup_pointer_type (target_type
);
13840 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13841 if (attr_byte_size
)
13842 byte_size
= DW_UNSND (attr_byte_size
);
13844 byte_size
= cu_header
->addr_size
;
13846 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
13847 if (attr_address_class
)
13848 addr_class
= DW_UNSND (attr_address_class
);
13850 addr_class
= DW_ADDR_none
;
13852 /* If the pointer size or address class is different than the
13853 default, create a type variant marked as such and set the
13854 length accordingly. */
13855 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
13857 if (gdbarch_address_class_type_flags_p (gdbarch
))
13861 type_flags
= gdbarch_address_class_type_flags
13862 (gdbarch
, byte_size
, addr_class
);
13863 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
13865 type
= make_type_with_address_space (type
, type_flags
);
13867 else if (TYPE_LENGTH (type
) != byte_size
)
13869 complaint (&symfile_complaints
,
13870 _("invalid pointer size %d"), byte_size
);
13874 /* Should we also complain about unhandled address classes? */
13878 TYPE_LENGTH (type
) = byte_size
;
13879 return set_die_type (die
, type
, cu
);
13882 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
13883 the user defined type vector. */
13885 static struct type
*
13886 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13889 struct type
*to_type
;
13890 struct type
*domain
;
13892 to_type
= die_type (die
, cu
);
13893 domain
= die_containing_type (die
, cu
);
13895 /* The calls above may have already set the type for this DIE. */
13896 type
= get_die_type (die
, cu
);
13900 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
13901 type
= lookup_methodptr_type (to_type
);
13902 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
13904 struct type
*new_type
= alloc_type (cu
->objfile
);
13906 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
13907 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
13908 TYPE_VARARGS (to_type
));
13909 type
= lookup_methodptr_type (new_type
);
13912 type
= lookup_memberptr_type (to_type
, domain
);
13914 return set_die_type (die
, type
, cu
);
13917 /* Extract all information from a DW_TAG_reference_type DIE and add to
13918 the user defined type vector. */
13920 static struct type
*
13921 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13923 struct comp_unit_head
*cu_header
= &cu
->header
;
13924 struct type
*type
, *target_type
;
13925 struct attribute
*attr
;
13927 target_type
= die_type (die
, cu
);
13929 /* The die_type call above may have already set the type for this DIE. */
13930 type
= get_die_type (die
, cu
);
13934 type
= lookup_reference_type (target_type
);
13935 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13938 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13942 TYPE_LENGTH (type
) = cu_header
->addr_size
;
13944 return set_die_type (die
, type
, cu
);
13947 static struct type
*
13948 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13950 struct type
*base_type
, *cv_type
;
13952 base_type
= die_type (die
, cu
);
13954 /* The die_type call above may have already set the type for this DIE. */
13955 cv_type
= get_die_type (die
, cu
);
13959 /* In case the const qualifier is applied to an array type, the element type
13960 is so qualified, not the array type (section 6.7.3 of C99). */
13961 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
13963 struct type
*el_type
, *inner_array
;
13965 base_type
= copy_type (base_type
);
13966 inner_array
= base_type
;
13968 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
13970 TYPE_TARGET_TYPE (inner_array
) =
13971 copy_type (TYPE_TARGET_TYPE (inner_array
));
13972 inner_array
= TYPE_TARGET_TYPE (inner_array
);
13975 el_type
= TYPE_TARGET_TYPE (inner_array
);
13976 TYPE_TARGET_TYPE (inner_array
) =
13977 make_cv_type (1, TYPE_VOLATILE (el_type
), el_type
, NULL
);
13979 return set_die_type (die
, base_type
, cu
);
13982 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
13983 return set_die_type (die
, cv_type
, cu
);
13986 static struct type
*
13987 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13989 struct type
*base_type
, *cv_type
;
13991 base_type
= die_type (die
, cu
);
13993 /* The die_type call above may have already set the type for this DIE. */
13994 cv_type
= get_die_type (die
, cu
);
13998 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
13999 return set_die_type (die
, cv_type
, cu
);
14002 /* Handle DW_TAG_restrict_type. */
14004 static struct type
*
14005 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14007 struct type
*base_type
, *cv_type
;
14009 base_type
= die_type (die
, cu
);
14011 /* The die_type call above may have already set the type for this DIE. */
14012 cv_type
= get_die_type (die
, cu
);
14016 cv_type
= make_restrict_type (base_type
);
14017 return set_die_type (die
, cv_type
, cu
);
14020 /* Extract all information from a DW_TAG_string_type DIE and add to
14021 the user defined type vector. It isn't really a user defined type,
14022 but it behaves like one, with other DIE's using an AT_user_def_type
14023 attribute to reference it. */
14025 static struct type
*
14026 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14028 struct objfile
*objfile
= cu
->objfile
;
14029 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14030 struct type
*type
, *range_type
, *index_type
, *char_type
;
14031 struct attribute
*attr
;
14032 unsigned int length
;
14034 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
14037 length
= DW_UNSND (attr
);
14041 /* Check for the DW_AT_byte_size attribute. */
14042 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14045 length
= DW_UNSND (attr
);
14053 index_type
= objfile_type (objfile
)->builtin_int
;
14054 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
14055 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
14056 type
= create_string_type (NULL
, char_type
, range_type
);
14058 return set_die_type (die
, type
, cu
);
14061 /* Assuming that DIE corresponds to a function, returns nonzero
14062 if the function is prototyped. */
14065 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
14067 struct attribute
*attr
;
14069 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
14070 if (attr
&& (DW_UNSND (attr
) != 0))
14073 /* The DWARF standard implies that the DW_AT_prototyped attribute
14074 is only meaninful for C, but the concept also extends to other
14075 languages that allow unprototyped functions (Eg: Objective C).
14076 For all other languages, assume that functions are always
14078 if (cu
->language
!= language_c
14079 && cu
->language
!= language_objc
14080 && cu
->language
!= language_opencl
)
14083 /* RealView does not emit DW_AT_prototyped. We can not distinguish
14084 prototyped and unprototyped functions; default to prototyped,
14085 since that is more common in modern code (and RealView warns
14086 about unprototyped functions). */
14087 if (producer_is_realview (cu
->producer
))
14093 /* Handle DIES due to C code like:
14097 int (*funcp)(int a, long l);
14101 ('funcp' generates a DW_TAG_subroutine_type DIE). */
14103 static struct type
*
14104 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14106 struct objfile
*objfile
= cu
->objfile
;
14107 struct type
*type
; /* Type that this function returns. */
14108 struct type
*ftype
; /* Function that returns above type. */
14109 struct attribute
*attr
;
14111 type
= die_type (die
, cu
);
14113 /* The die_type call above may have already set the type for this DIE. */
14114 ftype
= get_die_type (die
, cu
);
14118 ftype
= lookup_function_type (type
);
14120 if (prototyped_function_p (die
, cu
))
14121 TYPE_PROTOTYPED (ftype
) = 1;
14123 /* Store the calling convention in the type if it's available in
14124 the subroutine die. Otherwise set the calling convention to
14125 the default value DW_CC_normal. */
14126 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
14128 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
14129 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
14130 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
14132 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
14134 /* We need to add the subroutine type to the die immediately so
14135 we don't infinitely recurse when dealing with parameters
14136 declared as the same subroutine type. */
14137 set_die_type (die
, ftype
, cu
);
14139 if (die
->child
!= NULL
)
14141 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
14142 struct die_info
*child_die
;
14143 int nparams
, iparams
;
14145 /* Count the number of parameters.
14146 FIXME: GDB currently ignores vararg functions, but knows about
14147 vararg member functions. */
14149 child_die
= die
->child
;
14150 while (child_die
&& child_die
->tag
)
14152 if (child_die
->tag
== DW_TAG_formal_parameter
)
14154 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
14155 TYPE_VARARGS (ftype
) = 1;
14156 child_die
= sibling_die (child_die
);
14159 /* Allocate storage for parameters and fill them in. */
14160 TYPE_NFIELDS (ftype
) = nparams
;
14161 TYPE_FIELDS (ftype
) = (struct field
*)
14162 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
14164 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
14165 even if we error out during the parameters reading below. */
14166 for (iparams
= 0; iparams
< nparams
; iparams
++)
14167 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
14170 child_die
= die
->child
;
14171 while (child_die
&& child_die
->tag
)
14173 if (child_die
->tag
== DW_TAG_formal_parameter
)
14175 struct type
*arg_type
;
14177 /* DWARF version 2 has no clean way to discern C++
14178 static and non-static member functions. G++ helps
14179 GDB by marking the first parameter for non-static
14180 member functions (which is the this pointer) as
14181 artificial. We pass this information to
14182 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
14184 DWARF version 3 added DW_AT_object_pointer, which GCC
14185 4.5 does not yet generate. */
14186 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
14188 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
14191 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
14193 /* GCC/43521: In java, the formal parameter
14194 "this" is sometimes not marked with DW_AT_artificial. */
14195 if (cu
->language
== language_java
)
14197 const char *name
= dwarf2_name (child_die
, cu
);
14199 if (name
&& !strcmp (name
, "this"))
14200 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
14203 arg_type
= die_type (child_die
, cu
);
14205 /* RealView does not mark THIS as const, which the testsuite
14206 expects. GCC marks THIS as const in method definitions,
14207 but not in the class specifications (GCC PR 43053). */
14208 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
14209 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
14212 struct dwarf2_cu
*arg_cu
= cu
;
14213 const char *name
= dwarf2_name (child_die
, cu
);
14215 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
14218 /* If the compiler emits this, use it. */
14219 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
14222 else if (name
&& strcmp (name
, "this") == 0)
14223 /* Function definitions will have the argument names. */
14225 else if (name
== NULL
&& iparams
== 0)
14226 /* Declarations may not have the names, so like
14227 elsewhere in GDB, assume an artificial first
14228 argument is "this". */
14232 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
14236 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
14239 child_die
= sibling_die (child_die
);
14246 static struct type
*
14247 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
14249 struct objfile
*objfile
= cu
->objfile
;
14250 const char *name
= NULL
;
14251 struct type
*this_type
, *target_type
;
14253 name
= dwarf2_full_name (NULL
, die
, cu
);
14254 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
14255 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
14256 TYPE_NAME (this_type
) = name
;
14257 set_die_type (die
, this_type
, cu
);
14258 target_type
= die_type (die
, cu
);
14259 if (target_type
!= this_type
)
14260 TYPE_TARGET_TYPE (this_type
) = target_type
;
14263 /* Self-referential typedefs are, it seems, not allowed by the DWARF
14264 spec and cause infinite loops in GDB. */
14265 complaint (&symfile_complaints
,
14266 _("Self-referential DW_TAG_typedef "
14267 "- DIE at 0x%x [in module %s]"),
14268 die
->offset
.sect_off
, objfile_name (objfile
));
14269 TYPE_TARGET_TYPE (this_type
) = NULL
;
14274 /* Find a representation of a given base type and install
14275 it in the TYPE field of the die. */
14277 static struct type
*
14278 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14280 struct objfile
*objfile
= cu
->objfile
;
14282 struct attribute
*attr
;
14283 int encoding
= 0, size
= 0;
14285 enum type_code code
= TYPE_CODE_INT
;
14286 int type_flags
= 0;
14287 struct type
*target_type
= NULL
;
14289 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
14292 encoding
= DW_UNSND (attr
);
14294 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14297 size
= DW_UNSND (attr
);
14299 name
= dwarf2_name (die
, cu
);
14302 complaint (&symfile_complaints
,
14303 _("DW_AT_name missing from DW_TAG_base_type"));
14308 case DW_ATE_address
:
14309 /* Turn DW_ATE_address into a void * pointer. */
14310 code
= TYPE_CODE_PTR
;
14311 type_flags
|= TYPE_FLAG_UNSIGNED
;
14312 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
14314 case DW_ATE_boolean
:
14315 code
= TYPE_CODE_BOOL
;
14316 type_flags
|= TYPE_FLAG_UNSIGNED
;
14318 case DW_ATE_complex_float
:
14319 code
= TYPE_CODE_COMPLEX
;
14320 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
14322 case DW_ATE_decimal_float
:
14323 code
= TYPE_CODE_DECFLOAT
;
14326 code
= TYPE_CODE_FLT
;
14328 case DW_ATE_signed
:
14330 case DW_ATE_unsigned
:
14331 type_flags
|= TYPE_FLAG_UNSIGNED
;
14332 if (cu
->language
== language_fortran
14334 && strncmp (name
, "character(", sizeof ("character(") - 1) == 0)
14335 code
= TYPE_CODE_CHAR
;
14337 case DW_ATE_signed_char
:
14338 if (cu
->language
== language_ada
|| cu
->language
== language_m2
14339 || cu
->language
== language_pascal
14340 || cu
->language
== language_fortran
)
14341 code
= TYPE_CODE_CHAR
;
14343 case DW_ATE_unsigned_char
:
14344 if (cu
->language
== language_ada
|| cu
->language
== language_m2
14345 || cu
->language
== language_pascal
14346 || cu
->language
== language_fortran
)
14347 code
= TYPE_CODE_CHAR
;
14348 type_flags
|= TYPE_FLAG_UNSIGNED
;
14351 /* We just treat this as an integer and then recognize the
14352 type by name elsewhere. */
14356 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
14357 dwarf_type_encoding_name (encoding
));
14361 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
14362 TYPE_NAME (type
) = name
;
14363 TYPE_TARGET_TYPE (type
) = target_type
;
14365 if (name
&& strcmp (name
, "char") == 0)
14366 TYPE_NOSIGN (type
) = 1;
14368 return set_die_type (die
, type
, cu
);
14371 /* Parse dwarf attribute if it's a block, reference or constant and put the
14372 resulting value of the attribute into struct bound_prop.
14373 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
14376 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
14377 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
)
14379 struct dwarf2_property_baton
*baton
;
14380 struct obstack
*obstack
= &cu
->objfile
->objfile_obstack
;
14382 if (attr
== NULL
|| prop
== NULL
)
14385 if (attr_form_is_block (attr
))
14387 baton
= obstack_alloc (obstack
, sizeof (*baton
));
14388 baton
->referenced_type
= NULL
;
14389 baton
->locexpr
.per_cu
= cu
->per_cu
;
14390 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
14391 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
14392 prop
->data
.baton
= baton
;
14393 prop
->kind
= PROP_LOCEXPR
;
14394 gdb_assert (prop
->data
.baton
!= NULL
);
14396 else if (attr_form_is_ref (attr
))
14398 struct dwarf2_cu
*target_cu
= cu
;
14399 struct die_info
*target_die
;
14400 struct attribute
*target_attr
;
14402 target_die
= follow_die_ref (die
, attr
, &target_cu
);
14403 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
14404 if (target_attr
== NULL
)
14407 if (attr_form_is_section_offset (target_attr
))
14409 baton
= obstack_alloc (obstack
, sizeof (*baton
));
14410 baton
->referenced_type
= die_type (target_die
, target_cu
);
14411 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
14412 prop
->data
.baton
= baton
;
14413 prop
->kind
= PROP_LOCLIST
;
14414 gdb_assert (prop
->data
.baton
!= NULL
);
14416 else if (attr_form_is_block (target_attr
))
14418 baton
= obstack_alloc (obstack
, sizeof (*baton
));
14419 baton
->referenced_type
= die_type (target_die
, target_cu
);
14420 baton
->locexpr
.per_cu
= cu
->per_cu
;
14421 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
14422 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
14423 prop
->data
.baton
= baton
;
14424 prop
->kind
= PROP_LOCEXPR
;
14425 gdb_assert (prop
->data
.baton
!= NULL
);
14429 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
14430 "dynamic property");
14434 else if (attr_form_is_constant (attr
))
14436 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
14437 prop
->kind
= PROP_CONST
;
14441 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
14442 dwarf2_name (die
, cu
));
14449 /* Read the given DW_AT_subrange DIE. */
14451 static struct type
*
14452 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14454 struct type
*base_type
, *orig_base_type
;
14455 struct type
*range_type
;
14456 struct attribute
*attr
;
14457 struct dynamic_prop low
, high
;
14458 int low_default_is_valid
;
14459 int high_bound_is_count
= 0;
14461 LONGEST negative_mask
;
14463 orig_base_type
= die_type (die
, cu
);
14464 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
14465 whereas the real type might be. So, we use ORIG_BASE_TYPE when
14466 creating the range type, but we use the result of check_typedef
14467 when examining properties of the type. */
14468 base_type
= check_typedef (orig_base_type
);
14470 /* The die_type call above may have already set the type for this DIE. */
14471 range_type
= get_die_type (die
, cu
);
14475 low
.kind
= PROP_CONST
;
14476 high
.kind
= PROP_CONST
;
14477 high
.data
.const_val
= 0;
14479 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
14480 omitting DW_AT_lower_bound. */
14481 switch (cu
->language
)
14484 case language_cplus
:
14485 low
.data
.const_val
= 0;
14486 low_default_is_valid
= 1;
14488 case language_fortran
:
14489 low
.data
.const_val
= 1;
14490 low_default_is_valid
= 1;
14493 case language_java
:
14494 case language_objc
:
14495 low
.data
.const_val
= 0;
14496 low_default_is_valid
= (cu
->header
.version
>= 4);
14500 case language_pascal
:
14501 low
.data
.const_val
= 1;
14502 low_default_is_valid
= (cu
->header
.version
>= 4);
14505 low
.data
.const_val
= 0;
14506 low_default_is_valid
= 0;
14510 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
14512 attr_to_dynamic_prop (attr
, die
, cu
, &low
);
14513 else if (!low_default_is_valid
)
14514 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
14515 "- DIE at 0x%x [in module %s]"),
14516 die
->offset
.sect_off
, objfile_name (cu
->objfile
));
14518 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
14519 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
))
14521 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
14522 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
))
14524 /* If bounds are constant do the final calculation here. */
14525 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
14526 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
14528 high_bound_is_count
= 1;
14532 /* Dwarf-2 specifications explicitly allows to create subrange types
14533 without specifying a base type.
14534 In that case, the base type must be set to the type of
14535 the lower bound, upper bound or count, in that order, if any of these
14536 three attributes references an object that has a type.
14537 If no base type is found, the Dwarf-2 specifications say that
14538 a signed integer type of size equal to the size of an address should
14540 For the following C code: `extern char gdb_int [];'
14541 GCC produces an empty range DIE.
14542 FIXME: muller/2010-05-28: Possible references to object for low bound,
14543 high bound or count are not yet handled by this code. */
14544 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
14546 struct objfile
*objfile
= cu
->objfile
;
14547 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14548 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
14549 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
14551 /* Test "int", "long int", and "long long int" objfile types,
14552 and select the first one having a size above or equal to the
14553 architecture address size. */
14554 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
14555 base_type
= int_type
;
14558 int_type
= objfile_type (objfile
)->builtin_long
;
14559 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
14560 base_type
= int_type
;
14563 int_type
= objfile_type (objfile
)->builtin_long_long
;
14564 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
14565 base_type
= int_type
;
14570 /* Normally, the DWARF producers are expected to use a signed
14571 constant form (Eg. DW_FORM_sdata) to express negative bounds.
14572 But this is unfortunately not always the case, as witnessed
14573 with GCC, for instance, where the ambiguous DW_FORM_dataN form
14574 is used instead. To work around that ambiguity, we treat
14575 the bounds as signed, and thus sign-extend their values, when
14576 the base type is signed. */
14578 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
14579 if (low
.kind
== PROP_CONST
14580 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
14581 low
.data
.const_val
|= negative_mask
;
14582 if (high
.kind
== PROP_CONST
14583 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
14584 high
.data
.const_val
|= negative_mask
;
14586 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
);
14588 if (high_bound_is_count
)
14589 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
14591 /* Ada expects an empty array on no boundary attributes. */
14592 if (attr
== NULL
&& cu
->language
!= language_ada
)
14593 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
14595 name
= dwarf2_name (die
, cu
);
14597 TYPE_NAME (range_type
) = name
;
14599 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14601 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
14603 set_die_type (die
, range_type
, cu
);
14605 /* set_die_type should be already done. */
14606 set_descriptive_type (range_type
, die
, cu
);
14611 static struct type
*
14612 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14616 /* For now, we only support the C meaning of an unspecified type: void. */
14618 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
14619 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
14621 return set_die_type (die
, type
, cu
);
14624 /* Read a single die and all its descendents. Set the die's sibling
14625 field to NULL; set other fields in the die correctly, and set all
14626 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
14627 location of the info_ptr after reading all of those dies. PARENT
14628 is the parent of the die in question. */
14630 static struct die_info
*
14631 read_die_and_children (const struct die_reader_specs
*reader
,
14632 const gdb_byte
*info_ptr
,
14633 const gdb_byte
**new_info_ptr
,
14634 struct die_info
*parent
)
14636 struct die_info
*die
;
14637 const gdb_byte
*cur_ptr
;
14640 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
14643 *new_info_ptr
= cur_ptr
;
14646 store_in_ref_table (die
, reader
->cu
);
14649 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
14653 *new_info_ptr
= cur_ptr
;
14656 die
->sibling
= NULL
;
14657 die
->parent
= parent
;
14661 /* Read a die, all of its descendents, and all of its siblings; set
14662 all of the fields of all of the dies correctly. Arguments are as
14663 in read_die_and_children. */
14665 static struct die_info
*
14666 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
14667 const gdb_byte
*info_ptr
,
14668 const gdb_byte
**new_info_ptr
,
14669 struct die_info
*parent
)
14671 struct die_info
*first_die
, *last_sibling
;
14672 const gdb_byte
*cur_ptr
;
14674 cur_ptr
= info_ptr
;
14675 first_die
= last_sibling
= NULL
;
14679 struct die_info
*die
14680 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
14684 *new_info_ptr
= cur_ptr
;
14691 last_sibling
->sibling
= die
;
14693 last_sibling
= die
;
14697 /* Read a die, all of its descendents, and all of its siblings; set
14698 all of the fields of all of the dies correctly. Arguments are as
14699 in read_die_and_children.
14700 This the main entry point for reading a DIE and all its children. */
14702 static struct die_info
*
14703 read_die_and_siblings (const struct die_reader_specs
*reader
,
14704 const gdb_byte
*info_ptr
,
14705 const gdb_byte
**new_info_ptr
,
14706 struct die_info
*parent
)
14708 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
14709 new_info_ptr
, parent
);
14711 if (dwarf2_die_debug
)
14713 fprintf_unfiltered (gdb_stdlog
,
14714 "Read die from %s@0x%x of %s:\n",
14715 get_section_name (reader
->die_section
),
14716 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
14717 bfd_get_filename (reader
->abfd
));
14718 dump_die (die
, dwarf2_die_debug
);
14724 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
14726 The caller is responsible for filling in the extra attributes
14727 and updating (*DIEP)->num_attrs.
14728 Set DIEP to point to a newly allocated die with its information,
14729 except for its child, sibling, and parent fields.
14730 Set HAS_CHILDREN to tell whether the die has children or not. */
14732 static const gdb_byte
*
14733 read_full_die_1 (const struct die_reader_specs
*reader
,
14734 struct die_info
**diep
, const gdb_byte
*info_ptr
,
14735 int *has_children
, int num_extra_attrs
)
14737 unsigned int abbrev_number
, bytes_read
, i
;
14738 sect_offset offset
;
14739 struct abbrev_info
*abbrev
;
14740 struct die_info
*die
;
14741 struct dwarf2_cu
*cu
= reader
->cu
;
14742 bfd
*abfd
= reader
->abfd
;
14744 offset
.sect_off
= info_ptr
- reader
->buffer
;
14745 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
14746 info_ptr
+= bytes_read
;
14747 if (!abbrev_number
)
14754 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
14756 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
14758 bfd_get_filename (abfd
));
14760 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
14761 die
->offset
= offset
;
14762 die
->tag
= abbrev
->tag
;
14763 die
->abbrev
= abbrev_number
;
14765 /* Make the result usable.
14766 The caller needs to update num_attrs after adding the extra
14768 die
->num_attrs
= abbrev
->num_attrs
;
14770 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
14771 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
14775 *has_children
= abbrev
->has_children
;
14779 /* Read a die and all its attributes.
14780 Set DIEP to point to a newly allocated die with its information,
14781 except for its child, sibling, and parent fields.
14782 Set HAS_CHILDREN to tell whether the die has children or not. */
14784 static const gdb_byte
*
14785 read_full_die (const struct die_reader_specs
*reader
,
14786 struct die_info
**diep
, const gdb_byte
*info_ptr
,
14789 const gdb_byte
*result
;
14791 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
14793 if (dwarf2_die_debug
)
14795 fprintf_unfiltered (gdb_stdlog
,
14796 "Read die from %s@0x%x of %s:\n",
14797 get_section_name (reader
->die_section
),
14798 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
14799 bfd_get_filename (reader
->abfd
));
14800 dump_die (*diep
, dwarf2_die_debug
);
14806 /* Abbreviation tables.
14808 In DWARF version 2, the description of the debugging information is
14809 stored in a separate .debug_abbrev section. Before we read any
14810 dies from a section we read in all abbreviations and install them
14811 in a hash table. */
14813 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
14815 static struct abbrev_info
*
14816 abbrev_table_alloc_abbrev (struct abbrev_table
*abbrev_table
)
14818 struct abbrev_info
*abbrev
;
14820 abbrev
= (struct abbrev_info
*)
14821 obstack_alloc (&abbrev_table
->abbrev_obstack
, sizeof (struct abbrev_info
));
14822 memset (abbrev
, 0, sizeof (struct abbrev_info
));
14826 /* Add an abbreviation to the table. */
14829 abbrev_table_add_abbrev (struct abbrev_table
*abbrev_table
,
14830 unsigned int abbrev_number
,
14831 struct abbrev_info
*abbrev
)
14833 unsigned int hash_number
;
14835 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
14836 abbrev
->next
= abbrev_table
->abbrevs
[hash_number
];
14837 abbrev_table
->abbrevs
[hash_number
] = abbrev
;
14840 /* Look up an abbrev in the table.
14841 Returns NULL if the abbrev is not found. */
14843 static struct abbrev_info
*
14844 abbrev_table_lookup_abbrev (const struct abbrev_table
*abbrev_table
,
14845 unsigned int abbrev_number
)
14847 unsigned int hash_number
;
14848 struct abbrev_info
*abbrev
;
14850 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
14851 abbrev
= abbrev_table
->abbrevs
[hash_number
];
14855 if (abbrev
->number
== abbrev_number
)
14857 abbrev
= abbrev
->next
;
14862 /* Read in an abbrev table. */
14864 static struct abbrev_table
*
14865 abbrev_table_read_table (struct dwarf2_section_info
*section
,
14866 sect_offset offset
)
14868 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14869 bfd
*abfd
= get_section_bfd_owner (section
);
14870 struct abbrev_table
*abbrev_table
;
14871 const gdb_byte
*abbrev_ptr
;
14872 struct abbrev_info
*cur_abbrev
;
14873 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
14874 unsigned int abbrev_form
;
14875 struct attr_abbrev
*cur_attrs
;
14876 unsigned int allocated_attrs
;
14878 abbrev_table
= XNEW (struct abbrev_table
);
14879 abbrev_table
->offset
= offset
;
14880 obstack_init (&abbrev_table
->abbrev_obstack
);
14881 abbrev_table
->abbrevs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
14883 * sizeof (struct abbrev_info
*)));
14884 memset (abbrev_table
->abbrevs
, 0,
14885 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
14887 dwarf2_read_section (objfile
, section
);
14888 abbrev_ptr
= section
->buffer
+ offset
.sect_off
;
14889 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
14890 abbrev_ptr
+= bytes_read
;
14892 allocated_attrs
= ATTR_ALLOC_CHUNK
;
14893 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
14895 /* Loop until we reach an abbrev number of 0. */
14896 while (abbrev_number
)
14898 cur_abbrev
= abbrev_table_alloc_abbrev (abbrev_table
);
14900 /* read in abbrev header */
14901 cur_abbrev
->number
= abbrev_number
;
14902 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
14903 abbrev_ptr
+= bytes_read
;
14904 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
14907 /* now read in declarations */
14908 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
14909 abbrev_ptr
+= bytes_read
;
14910 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
14911 abbrev_ptr
+= bytes_read
;
14912 while (abbrev_name
)
14914 if (cur_abbrev
->num_attrs
== allocated_attrs
)
14916 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
14918 = xrealloc (cur_attrs
, (allocated_attrs
14919 * sizeof (struct attr_abbrev
)));
14922 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
14923 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
14924 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
14925 abbrev_ptr
+= bytes_read
;
14926 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
14927 abbrev_ptr
+= bytes_read
;
14930 cur_abbrev
->attrs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
14931 (cur_abbrev
->num_attrs
14932 * sizeof (struct attr_abbrev
)));
14933 memcpy (cur_abbrev
->attrs
, cur_attrs
,
14934 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
14936 abbrev_table_add_abbrev (abbrev_table
, abbrev_number
, cur_abbrev
);
14938 /* Get next abbreviation.
14939 Under Irix6 the abbreviations for a compilation unit are not
14940 always properly terminated with an abbrev number of 0.
14941 Exit loop if we encounter an abbreviation which we have
14942 already read (which means we are about to read the abbreviations
14943 for the next compile unit) or if the end of the abbreviation
14944 table is reached. */
14945 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
14947 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
14948 abbrev_ptr
+= bytes_read
;
14949 if (abbrev_table_lookup_abbrev (abbrev_table
, abbrev_number
) != NULL
)
14954 return abbrev_table
;
14957 /* Free the resources held by ABBREV_TABLE. */
14960 abbrev_table_free (struct abbrev_table
*abbrev_table
)
14962 obstack_free (&abbrev_table
->abbrev_obstack
, NULL
);
14963 xfree (abbrev_table
);
14966 /* Same as abbrev_table_free but as a cleanup.
14967 We pass in a pointer to the pointer to the table so that we can
14968 set the pointer to NULL when we're done. It also simplifies
14969 build_type_psymtabs_1. */
14972 abbrev_table_free_cleanup (void *table_ptr
)
14974 struct abbrev_table
**abbrev_table_ptr
= table_ptr
;
14976 if (*abbrev_table_ptr
!= NULL
)
14977 abbrev_table_free (*abbrev_table_ptr
);
14978 *abbrev_table_ptr
= NULL
;
14981 /* Read the abbrev table for CU from ABBREV_SECTION. */
14984 dwarf2_read_abbrevs (struct dwarf2_cu
*cu
,
14985 struct dwarf2_section_info
*abbrev_section
)
14988 abbrev_table_read_table (abbrev_section
, cu
->header
.abbrev_offset
);
14991 /* Release the memory used by the abbrev table for a compilation unit. */
14994 dwarf2_free_abbrev_table (void *ptr_to_cu
)
14996 struct dwarf2_cu
*cu
= ptr_to_cu
;
14998 if (cu
->abbrev_table
!= NULL
)
14999 abbrev_table_free (cu
->abbrev_table
);
15000 /* Set this to NULL so that we SEGV if we try to read it later,
15001 and also because free_comp_unit verifies this is NULL. */
15002 cu
->abbrev_table
= NULL
;
15005 /* Returns nonzero if TAG represents a type that we might generate a partial
15009 is_type_tag_for_partial (int tag
)
15014 /* Some types that would be reasonable to generate partial symbols for,
15015 that we don't at present. */
15016 case DW_TAG_array_type
:
15017 case DW_TAG_file_type
:
15018 case DW_TAG_ptr_to_member_type
:
15019 case DW_TAG_set_type
:
15020 case DW_TAG_string_type
:
15021 case DW_TAG_subroutine_type
:
15023 case DW_TAG_base_type
:
15024 case DW_TAG_class_type
:
15025 case DW_TAG_interface_type
:
15026 case DW_TAG_enumeration_type
:
15027 case DW_TAG_structure_type
:
15028 case DW_TAG_subrange_type
:
15029 case DW_TAG_typedef
:
15030 case DW_TAG_union_type
:
15037 /* Load all DIEs that are interesting for partial symbols into memory. */
15039 static struct partial_die_info
*
15040 load_partial_dies (const struct die_reader_specs
*reader
,
15041 const gdb_byte
*info_ptr
, int building_psymtab
)
15043 struct dwarf2_cu
*cu
= reader
->cu
;
15044 struct objfile
*objfile
= cu
->objfile
;
15045 struct partial_die_info
*part_die
;
15046 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
15047 struct abbrev_info
*abbrev
;
15048 unsigned int bytes_read
;
15049 unsigned int load_all
= 0;
15050 int nesting_level
= 1;
15055 gdb_assert (cu
->per_cu
!= NULL
);
15056 if (cu
->per_cu
->load_all_dies
)
15060 = htab_create_alloc_ex (cu
->header
.length
/ 12,
15064 &cu
->comp_unit_obstack
,
15065 hashtab_obstack_allocate
,
15066 dummy_obstack_deallocate
);
15068 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
15069 sizeof (struct partial_die_info
));
15073 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
15075 /* A NULL abbrev means the end of a series of children. */
15076 if (abbrev
== NULL
)
15078 if (--nesting_level
== 0)
15080 /* PART_DIE was probably the last thing allocated on the
15081 comp_unit_obstack, so we could call obstack_free
15082 here. We don't do that because the waste is small,
15083 and will be cleaned up when we're done with this
15084 compilation unit. This way, we're also more robust
15085 against other users of the comp_unit_obstack. */
15088 info_ptr
+= bytes_read
;
15089 last_die
= parent_die
;
15090 parent_die
= parent_die
->die_parent
;
15094 /* Check for template arguments. We never save these; if
15095 they're seen, we just mark the parent, and go on our way. */
15096 if (parent_die
!= NULL
15097 && cu
->language
== language_cplus
15098 && (abbrev
->tag
== DW_TAG_template_type_param
15099 || abbrev
->tag
== DW_TAG_template_value_param
))
15101 parent_die
->has_template_arguments
= 1;
15105 /* We don't need a partial DIE for the template argument. */
15106 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15111 /* We only recurse into c++ subprograms looking for template arguments.
15112 Skip their other children. */
15114 && cu
->language
== language_cplus
15115 && parent_die
!= NULL
15116 && parent_die
->tag
== DW_TAG_subprogram
)
15118 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15122 /* Check whether this DIE is interesting enough to save. Normally
15123 we would not be interested in members here, but there may be
15124 later variables referencing them via DW_AT_specification (for
15125 static members). */
15127 && !is_type_tag_for_partial (abbrev
->tag
)
15128 && abbrev
->tag
!= DW_TAG_constant
15129 && abbrev
->tag
!= DW_TAG_enumerator
15130 && abbrev
->tag
!= DW_TAG_subprogram
15131 && abbrev
->tag
!= DW_TAG_lexical_block
15132 && abbrev
->tag
!= DW_TAG_variable
15133 && abbrev
->tag
!= DW_TAG_namespace
15134 && abbrev
->tag
!= DW_TAG_module
15135 && abbrev
->tag
!= DW_TAG_member
15136 && abbrev
->tag
!= DW_TAG_imported_unit
15137 && abbrev
->tag
!= DW_TAG_imported_declaration
)
15139 /* Otherwise we skip to the next sibling, if any. */
15140 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15144 info_ptr
= read_partial_die (reader
, part_die
, abbrev
, bytes_read
,
15147 /* This two-pass algorithm for processing partial symbols has a
15148 high cost in cache pressure. Thus, handle some simple cases
15149 here which cover the majority of C partial symbols. DIEs
15150 which neither have specification tags in them, nor could have
15151 specification tags elsewhere pointing at them, can simply be
15152 processed and discarded.
15154 This segment is also optional; scan_partial_symbols and
15155 add_partial_symbol will handle these DIEs if we chain
15156 them in normally. When compilers which do not emit large
15157 quantities of duplicate debug information are more common,
15158 this code can probably be removed. */
15160 /* Any complete simple types at the top level (pretty much all
15161 of them, for a language without namespaces), can be processed
15163 if (parent_die
== NULL
15164 && part_die
->has_specification
== 0
15165 && part_die
->is_declaration
== 0
15166 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
15167 || part_die
->tag
== DW_TAG_base_type
15168 || part_die
->tag
== DW_TAG_subrange_type
))
15170 if (building_psymtab
&& part_die
->name
!= NULL
)
15171 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
15172 VAR_DOMAIN
, LOC_TYPEDEF
,
15173 &objfile
->static_psymbols
,
15174 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
15175 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
15179 /* The exception for DW_TAG_typedef with has_children above is
15180 a workaround of GCC PR debug/47510. In the case of this complaint
15181 type_name_no_tag_or_error will error on such types later.
15183 GDB skipped children of DW_TAG_typedef by the shortcut above and then
15184 it could not find the child DIEs referenced later, this is checked
15185 above. In correct DWARF DW_TAG_typedef should have no children. */
15187 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
15188 complaint (&symfile_complaints
,
15189 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
15190 "- DIE at 0x%x [in module %s]"),
15191 part_die
->offset
.sect_off
, objfile_name (objfile
));
15193 /* If we're at the second level, and we're an enumerator, and
15194 our parent has no specification (meaning possibly lives in a
15195 namespace elsewhere), then we can add the partial symbol now
15196 instead of queueing it. */
15197 if (part_die
->tag
== DW_TAG_enumerator
15198 && parent_die
!= NULL
15199 && parent_die
->die_parent
== NULL
15200 && parent_die
->tag
== DW_TAG_enumeration_type
15201 && parent_die
->has_specification
== 0)
15203 if (part_die
->name
== NULL
)
15204 complaint (&symfile_complaints
,
15205 _("malformed enumerator DIE ignored"));
15206 else if (building_psymtab
)
15207 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
15208 VAR_DOMAIN
, LOC_CONST
,
15209 (cu
->language
== language_cplus
15210 || cu
->language
== language_java
)
15211 ? &objfile
->global_psymbols
15212 : &objfile
->static_psymbols
,
15213 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
15215 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
15219 /* We'll save this DIE so link it in. */
15220 part_die
->die_parent
= parent_die
;
15221 part_die
->die_sibling
= NULL
;
15222 part_die
->die_child
= NULL
;
15224 if (last_die
&& last_die
== parent_die
)
15225 last_die
->die_child
= part_die
;
15227 last_die
->die_sibling
= part_die
;
15229 last_die
= part_die
;
15231 if (first_die
== NULL
)
15232 first_die
= part_die
;
15234 /* Maybe add the DIE to the hash table. Not all DIEs that we
15235 find interesting need to be in the hash table, because we
15236 also have the parent/sibling/child chains; only those that we
15237 might refer to by offset later during partial symbol reading.
15239 For now this means things that might have be the target of a
15240 DW_AT_specification, DW_AT_abstract_origin, or
15241 DW_AT_extension. DW_AT_extension will refer only to
15242 namespaces; DW_AT_abstract_origin refers to functions (and
15243 many things under the function DIE, but we do not recurse
15244 into function DIEs during partial symbol reading) and
15245 possibly variables as well; DW_AT_specification refers to
15246 declarations. Declarations ought to have the DW_AT_declaration
15247 flag. It happens that GCC forgets to put it in sometimes, but
15248 only for functions, not for types.
15250 Adding more things than necessary to the hash table is harmless
15251 except for the performance cost. Adding too few will result in
15252 wasted time in find_partial_die, when we reread the compilation
15253 unit with load_all_dies set. */
15256 || abbrev
->tag
== DW_TAG_constant
15257 || abbrev
->tag
== DW_TAG_subprogram
15258 || abbrev
->tag
== DW_TAG_variable
15259 || abbrev
->tag
== DW_TAG_namespace
15260 || part_die
->is_declaration
)
15264 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
15265 part_die
->offset
.sect_off
, INSERT
);
15269 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
15270 sizeof (struct partial_die_info
));
15272 /* For some DIEs we want to follow their children (if any). For C
15273 we have no reason to follow the children of structures; for other
15274 languages we have to, so that we can get at method physnames
15275 to infer fully qualified class names, for DW_AT_specification,
15276 and for C++ template arguments. For C++, we also look one level
15277 inside functions to find template arguments (if the name of the
15278 function does not already contain the template arguments).
15280 For Ada, we need to scan the children of subprograms and lexical
15281 blocks as well because Ada allows the definition of nested
15282 entities that could be interesting for the debugger, such as
15283 nested subprograms for instance. */
15284 if (last_die
->has_children
15286 || last_die
->tag
== DW_TAG_namespace
15287 || last_die
->tag
== DW_TAG_module
15288 || last_die
->tag
== DW_TAG_enumeration_type
15289 || (cu
->language
== language_cplus
15290 && last_die
->tag
== DW_TAG_subprogram
15291 && (last_die
->name
== NULL
15292 || strchr (last_die
->name
, '<') == NULL
))
15293 || (cu
->language
!= language_c
15294 && (last_die
->tag
== DW_TAG_class_type
15295 || last_die
->tag
== DW_TAG_interface_type
15296 || last_die
->tag
== DW_TAG_structure_type
15297 || last_die
->tag
== DW_TAG_union_type
))
15298 || (cu
->language
== language_ada
15299 && (last_die
->tag
== DW_TAG_subprogram
15300 || last_die
->tag
== DW_TAG_lexical_block
))))
15303 parent_die
= last_die
;
15307 /* Otherwise we skip to the next sibling, if any. */
15308 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
15310 /* Back to the top, do it again. */
15314 /* Read a minimal amount of information into the minimal die structure. */
15316 static const gdb_byte
*
15317 read_partial_die (const struct die_reader_specs
*reader
,
15318 struct partial_die_info
*part_die
,
15319 struct abbrev_info
*abbrev
, unsigned int abbrev_len
,
15320 const gdb_byte
*info_ptr
)
15322 struct dwarf2_cu
*cu
= reader
->cu
;
15323 struct objfile
*objfile
= cu
->objfile
;
15324 const gdb_byte
*buffer
= reader
->buffer
;
15326 struct attribute attr
;
15327 int has_low_pc_attr
= 0;
15328 int has_high_pc_attr
= 0;
15329 int high_pc_relative
= 0;
15331 memset (part_die
, 0, sizeof (struct partial_die_info
));
15333 part_die
->offset
.sect_off
= info_ptr
- buffer
;
15335 info_ptr
+= abbrev_len
;
15337 if (abbrev
== NULL
)
15340 part_die
->tag
= abbrev
->tag
;
15341 part_die
->has_children
= abbrev
->has_children
;
15343 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
15345 info_ptr
= read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
15347 /* Store the data if it is of an attribute we want to keep in a
15348 partial symbol table. */
15352 switch (part_die
->tag
)
15354 case DW_TAG_compile_unit
:
15355 case DW_TAG_partial_unit
:
15356 case DW_TAG_type_unit
:
15357 /* Compilation units have a DW_AT_name that is a filename, not
15358 a source language identifier. */
15359 case DW_TAG_enumeration_type
:
15360 case DW_TAG_enumerator
:
15361 /* These tags always have simple identifiers already; no need
15362 to canonicalize them. */
15363 part_die
->name
= DW_STRING (&attr
);
15367 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
15368 &objfile
->objfile_obstack
);
15372 case DW_AT_linkage_name
:
15373 case DW_AT_MIPS_linkage_name
:
15374 /* Note that both forms of linkage name might appear. We
15375 assume they will be the same, and we only store the last
15377 if (cu
->language
== language_ada
)
15378 part_die
->name
= DW_STRING (&attr
);
15379 part_die
->linkage_name
= DW_STRING (&attr
);
15382 has_low_pc_attr
= 1;
15383 part_die
->lowpc
= attr_value_as_address (&attr
);
15385 case DW_AT_high_pc
:
15386 has_high_pc_attr
= 1;
15387 part_die
->highpc
= attr_value_as_address (&attr
);
15388 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
15389 high_pc_relative
= 1;
15391 case DW_AT_location
:
15392 /* Support the .debug_loc offsets. */
15393 if (attr_form_is_block (&attr
))
15395 part_die
->d
.locdesc
= DW_BLOCK (&attr
);
15397 else if (attr_form_is_section_offset (&attr
))
15399 dwarf2_complex_location_expr_complaint ();
15403 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
15404 "partial symbol information");
15407 case DW_AT_external
:
15408 part_die
->is_external
= DW_UNSND (&attr
);
15410 case DW_AT_declaration
:
15411 part_die
->is_declaration
= DW_UNSND (&attr
);
15414 part_die
->has_type
= 1;
15416 case DW_AT_abstract_origin
:
15417 case DW_AT_specification
:
15418 case DW_AT_extension
:
15419 part_die
->has_specification
= 1;
15420 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
15421 part_die
->spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
15422 || cu
->per_cu
->is_dwz
);
15424 case DW_AT_sibling
:
15425 /* Ignore absolute siblings, they might point outside of
15426 the current compile unit. */
15427 if (attr
.form
== DW_FORM_ref_addr
)
15428 complaint (&symfile_complaints
,
15429 _("ignoring absolute DW_AT_sibling"));
15432 unsigned int off
= dwarf2_get_ref_die_offset (&attr
).sect_off
;
15433 const gdb_byte
*sibling_ptr
= buffer
+ off
;
15435 if (sibling_ptr
< info_ptr
)
15436 complaint (&symfile_complaints
,
15437 _("DW_AT_sibling points backwards"));
15438 else if (sibling_ptr
> reader
->buffer_end
)
15439 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
15441 part_die
->sibling
= sibling_ptr
;
15444 case DW_AT_byte_size
:
15445 part_die
->has_byte_size
= 1;
15447 case DW_AT_calling_convention
:
15448 /* DWARF doesn't provide a way to identify a program's source-level
15449 entry point. DW_AT_calling_convention attributes are only meant
15450 to describe functions' calling conventions.
15452 However, because it's a necessary piece of information in
15453 Fortran, and because DW_CC_program is the only piece of debugging
15454 information whose definition refers to a 'main program' at all,
15455 several compilers have begun marking Fortran main programs with
15456 DW_CC_program --- even when those functions use the standard
15457 calling conventions.
15459 So until DWARF specifies a way to provide this information and
15460 compilers pick up the new representation, we'll support this
15462 if (DW_UNSND (&attr
) == DW_CC_program
15463 && cu
->language
== language_fortran
)
15464 set_objfile_main_name (objfile
, part_die
->name
, language_fortran
);
15467 if (DW_UNSND (&attr
) == DW_INL_inlined
15468 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
15469 part_die
->may_be_inlined
= 1;
15473 if (part_die
->tag
== DW_TAG_imported_unit
)
15475 part_die
->d
.offset
= dwarf2_get_ref_die_offset (&attr
);
15476 part_die
->is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
15477 || cu
->per_cu
->is_dwz
);
15486 if (high_pc_relative
)
15487 part_die
->highpc
+= part_die
->lowpc
;
15489 if (has_low_pc_attr
&& has_high_pc_attr
)
15491 /* When using the GNU linker, .gnu.linkonce. sections are used to
15492 eliminate duplicate copies of functions and vtables and such.
15493 The linker will arbitrarily choose one and discard the others.
15494 The AT_*_pc values for such functions refer to local labels in
15495 these sections. If the section from that file was discarded, the
15496 labels are not in the output, so the relocs get a value of 0.
15497 If this is a discarded function, mark the pc bounds as invalid,
15498 so that GDB will ignore it. */
15499 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
15501 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15503 complaint (&symfile_complaints
,
15504 _("DW_AT_low_pc %s is zero "
15505 "for DIE at 0x%x [in module %s]"),
15506 paddress (gdbarch
, part_die
->lowpc
),
15507 part_die
->offset
.sect_off
, objfile_name (objfile
));
15509 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
15510 else if (part_die
->lowpc
>= part_die
->highpc
)
15512 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15514 complaint (&symfile_complaints
,
15515 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
15516 "for DIE at 0x%x [in module %s]"),
15517 paddress (gdbarch
, part_die
->lowpc
),
15518 paddress (gdbarch
, part_die
->highpc
),
15519 part_die
->offset
.sect_off
, objfile_name (objfile
));
15522 part_die
->has_pc_info
= 1;
15528 /* Find a cached partial DIE at OFFSET in CU. */
15530 static struct partial_die_info
*
15531 find_partial_die_in_comp_unit (sect_offset offset
, struct dwarf2_cu
*cu
)
15533 struct partial_die_info
*lookup_die
= NULL
;
15534 struct partial_die_info part_die
;
15536 part_die
.offset
= offset
;
15537 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
,
15543 /* Find a partial DIE at OFFSET, which may or may not be in CU,
15544 except in the case of .debug_types DIEs which do not reference
15545 outside their CU (they do however referencing other types via
15546 DW_FORM_ref_sig8). */
15548 static struct partial_die_info
*
15549 find_partial_die (sect_offset offset
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
15551 struct objfile
*objfile
= cu
->objfile
;
15552 struct dwarf2_per_cu_data
*per_cu
= NULL
;
15553 struct partial_die_info
*pd
= NULL
;
15555 if (offset_in_dwz
== cu
->per_cu
->is_dwz
15556 && offset_in_cu_p (&cu
->header
, offset
))
15558 pd
= find_partial_die_in_comp_unit (offset
, cu
);
15561 /* We missed recording what we needed.
15562 Load all dies and try again. */
15563 per_cu
= cu
->per_cu
;
15567 /* TUs don't reference other CUs/TUs (except via type signatures). */
15568 if (cu
->per_cu
->is_debug_types
)
15570 error (_("Dwarf Error: Type Unit at offset 0x%lx contains"
15571 " external reference to offset 0x%lx [in module %s].\n"),
15572 (long) cu
->header
.offset
.sect_off
, (long) offset
.sect_off
,
15573 bfd_get_filename (objfile
->obfd
));
15575 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
15578 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
15579 load_partial_comp_unit (per_cu
);
15581 per_cu
->cu
->last_used
= 0;
15582 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
15585 /* If we didn't find it, and not all dies have been loaded,
15586 load them all and try again. */
15588 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
15590 per_cu
->load_all_dies
= 1;
15592 /* This is nasty. When we reread the DIEs, somewhere up the call chain
15593 THIS_CU->cu may already be in use. So we can't just free it and
15594 replace its DIEs with the ones we read in. Instead, we leave those
15595 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
15596 and clobber THIS_CU->cu->partial_dies with the hash table for the new
15598 load_partial_comp_unit (per_cu
);
15600 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
15604 internal_error (__FILE__
, __LINE__
,
15605 _("could not find partial DIE 0x%x "
15606 "in cache [from module %s]\n"),
15607 offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
15611 /* See if we can figure out if the class lives in a namespace. We do
15612 this by looking for a member function; its demangled name will
15613 contain namespace info, if there is any. */
15616 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
15617 struct dwarf2_cu
*cu
)
15619 /* NOTE: carlton/2003-10-07: Getting the info this way changes
15620 what template types look like, because the demangler
15621 frequently doesn't give the same name as the debug info. We
15622 could fix this by only using the demangled name to get the
15623 prefix (but see comment in read_structure_type). */
15625 struct partial_die_info
*real_pdi
;
15626 struct partial_die_info
*child_pdi
;
15628 /* If this DIE (this DIE's specification, if any) has a parent, then
15629 we should not do this. We'll prepend the parent's fully qualified
15630 name when we create the partial symbol. */
15632 real_pdi
= struct_pdi
;
15633 while (real_pdi
->has_specification
)
15634 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
15635 real_pdi
->spec_is_dwz
, cu
);
15637 if (real_pdi
->die_parent
!= NULL
)
15640 for (child_pdi
= struct_pdi
->die_child
;
15642 child_pdi
= child_pdi
->die_sibling
)
15644 if (child_pdi
->tag
== DW_TAG_subprogram
15645 && child_pdi
->linkage_name
!= NULL
)
15647 char *actual_class_name
15648 = language_class_name_from_physname (cu
->language_defn
,
15649 child_pdi
->linkage_name
);
15650 if (actual_class_name
!= NULL
)
15653 = obstack_copy0 (&cu
->objfile
->objfile_obstack
,
15655 strlen (actual_class_name
));
15656 xfree (actual_class_name
);
15663 /* Adjust PART_DIE before generating a symbol for it. This function
15664 may set the is_external flag or change the DIE's name. */
15667 fixup_partial_die (struct partial_die_info
*part_die
,
15668 struct dwarf2_cu
*cu
)
15670 /* Once we've fixed up a die, there's no point in doing so again.
15671 This also avoids a memory leak if we were to call
15672 guess_partial_die_structure_name multiple times. */
15673 if (part_die
->fixup_called
)
15676 /* If we found a reference attribute and the DIE has no name, try
15677 to find a name in the referred to DIE. */
15679 if (part_die
->name
== NULL
&& part_die
->has_specification
)
15681 struct partial_die_info
*spec_die
;
15683 spec_die
= find_partial_die (part_die
->spec_offset
,
15684 part_die
->spec_is_dwz
, cu
);
15686 fixup_partial_die (spec_die
, cu
);
15688 if (spec_die
->name
)
15690 part_die
->name
= spec_die
->name
;
15692 /* Copy DW_AT_external attribute if it is set. */
15693 if (spec_die
->is_external
)
15694 part_die
->is_external
= spec_die
->is_external
;
15698 /* Set default names for some unnamed DIEs. */
15700 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
15701 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
15703 /* If there is no parent die to provide a namespace, and there are
15704 children, see if we can determine the namespace from their linkage
15706 if (cu
->language
== language_cplus
15707 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
15708 && part_die
->die_parent
== NULL
15709 && part_die
->has_children
15710 && (part_die
->tag
== DW_TAG_class_type
15711 || part_die
->tag
== DW_TAG_structure_type
15712 || part_die
->tag
== DW_TAG_union_type
))
15713 guess_partial_die_structure_name (part_die
, cu
);
15715 /* GCC might emit a nameless struct or union that has a linkage
15716 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
15717 if (part_die
->name
== NULL
15718 && (part_die
->tag
== DW_TAG_class_type
15719 || part_die
->tag
== DW_TAG_interface_type
15720 || part_die
->tag
== DW_TAG_structure_type
15721 || part_die
->tag
== DW_TAG_union_type
)
15722 && part_die
->linkage_name
!= NULL
)
15726 demangled
= gdb_demangle (part_die
->linkage_name
, DMGL_TYPES
);
15731 /* Strip any leading namespaces/classes, keep only the base name.
15732 DW_AT_name for named DIEs does not contain the prefixes. */
15733 base
= strrchr (demangled
, ':');
15734 if (base
&& base
> demangled
&& base
[-1] == ':')
15739 part_die
->name
= obstack_copy0 (&cu
->objfile
->objfile_obstack
,
15740 base
, strlen (base
));
15745 part_die
->fixup_called
= 1;
15748 /* Read an attribute value described by an attribute form. */
15750 static const gdb_byte
*
15751 read_attribute_value (const struct die_reader_specs
*reader
,
15752 struct attribute
*attr
, unsigned form
,
15753 const gdb_byte
*info_ptr
)
15755 struct dwarf2_cu
*cu
= reader
->cu
;
15756 bfd
*abfd
= reader
->abfd
;
15757 struct comp_unit_head
*cu_header
= &cu
->header
;
15758 unsigned int bytes_read
;
15759 struct dwarf_block
*blk
;
15764 case DW_FORM_ref_addr
:
15765 if (cu
->header
.version
== 2)
15766 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
15768 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
15769 &cu
->header
, &bytes_read
);
15770 info_ptr
+= bytes_read
;
15772 case DW_FORM_GNU_ref_alt
:
15773 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
15774 info_ptr
+= bytes_read
;
15777 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
15778 info_ptr
+= bytes_read
;
15780 case DW_FORM_block2
:
15781 blk
= dwarf_alloc_block (cu
);
15782 blk
->size
= read_2_bytes (abfd
, info_ptr
);
15784 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
15785 info_ptr
+= blk
->size
;
15786 DW_BLOCK (attr
) = blk
;
15788 case DW_FORM_block4
:
15789 blk
= dwarf_alloc_block (cu
);
15790 blk
->size
= read_4_bytes (abfd
, info_ptr
);
15792 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
15793 info_ptr
+= blk
->size
;
15794 DW_BLOCK (attr
) = blk
;
15796 case DW_FORM_data2
:
15797 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
15800 case DW_FORM_data4
:
15801 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
15804 case DW_FORM_data8
:
15805 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
15808 case DW_FORM_sec_offset
:
15809 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
15810 info_ptr
+= bytes_read
;
15812 case DW_FORM_string
:
15813 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
15814 DW_STRING_IS_CANONICAL (attr
) = 0;
15815 info_ptr
+= bytes_read
;
15818 if (!cu
->per_cu
->is_dwz
)
15820 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
15822 DW_STRING_IS_CANONICAL (attr
) = 0;
15823 info_ptr
+= bytes_read
;
15827 case DW_FORM_GNU_strp_alt
:
15829 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
15830 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
15833 DW_STRING (attr
) = read_indirect_string_from_dwz (dwz
, str_offset
);
15834 DW_STRING_IS_CANONICAL (attr
) = 0;
15835 info_ptr
+= bytes_read
;
15838 case DW_FORM_exprloc
:
15839 case DW_FORM_block
:
15840 blk
= dwarf_alloc_block (cu
);
15841 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
15842 info_ptr
+= bytes_read
;
15843 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
15844 info_ptr
+= blk
->size
;
15845 DW_BLOCK (attr
) = blk
;
15847 case DW_FORM_block1
:
15848 blk
= dwarf_alloc_block (cu
);
15849 blk
->size
= read_1_byte (abfd
, info_ptr
);
15851 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
15852 info_ptr
+= blk
->size
;
15853 DW_BLOCK (attr
) = blk
;
15855 case DW_FORM_data1
:
15856 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
15860 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
15863 case DW_FORM_flag_present
:
15864 DW_UNSND (attr
) = 1;
15866 case DW_FORM_sdata
:
15867 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
15868 info_ptr
+= bytes_read
;
15870 case DW_FORM_udata
:
15871 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
15872 info_ptr
+= bytes_read
;
15875 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
15876 + read_1_byte (abfd
, info_ptr
));
15880 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
15881 + read_2_bytes (abfd
, info_ptr
));
15885 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
15886 + read_4_bytes (abfd
, info_ptr
));
15890 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
15891 + read_8_bytes (abfd
, info_ptr
));
15894 case DW_FORM_ref_sig8
:
15895 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
15898 case DW_FORM_ref_udata
:
15899 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
15900 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
15901 info_ptr
+= bytes_read
;
15903 case DW_FORM_indirect
:
15904 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
15905 info_ptr
+= bytes_read
;
15906 info_ptr
= read_attribute_value (reader
, attr
, form
, info_ptr
);
15908 case DW_FORM_GNU_addr_index
:
15909 if (reader
->dwo_file
== NULL
)
15911 /* For now flag a hard error.
15912 Later we can turn this into a complaint. */
15913 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
15914 dwarf_form_name (form
),
15915 bfd_get_filename (abfd
));
15917 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
15918 info_ptr
+= bytes_read
;
15920 case DW_FORM_GNU_str_index
:
15921 if (reader
->dwo_file
== NULL
)
15923 /* For now flag a hard error.
15924 Later we can turn this into a complaint if warranted. */
15925 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
15926 dwarf_form_name (form
),
15927 bfd_get_filename (abfd
));
15930 ULONGEST str_index
=
15931 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
15933 DW_STRING (attr
) = read_str_index (reader
, str_index
);
15934 DW_STRING_IS_CANONICAL (attr
) = 0;
15935 info_ptr
+= bytes_read
;
15939 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
15940 dwarf_form_name (form
),
15941 bfd_get_filename (abfd
));
15945 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
15946 attr
->form
= DW_FORM_GNU_ref_alt
;
15948 /* We have seen instances where the compiler tried to emit a byte
15949 size attribute of -1 which ended up being encoded as an unsigned
15950 0xffffffff. Although 0xffffffff is technically a valid size value,
15951 an object of this size seems pretty unlikely so we can relatively
15952 safely treat these cases as if the size attribute was invalid and
15953 treat them as zero by default. */
15954 if (attr
->name
== DW_AT_byte_size
15955 && form
== DW_FORM_data4
15956 && DW_UNSND (attr
) >= 0xffffffff)
15959 (&symfile_complaints
,
15960 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
15961 hex_string (DW_UNSND (attr
)));
15962 DW_UNSND (attr
) = 0;
15968 /* Read an attribute described by an abbreviated attribute. */
15970 static const gdb_byte
*
15971 read_attribute (const struct die_reader_specs
*reader
,
15972 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
15973 const gdb_byte
*info_ptr
)
15975 attr
->name
= abbrev
->name
;
15976 return read_attribute_value (reader
, attr
, abbrev
->form
, info_ptr
);
15979 /* Read dwarf information from a buffer. */
15981 static unsigned int
15982 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
15984 return bfd_get_8 (abfd
, buf
);
15988 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
15990 return bfd_get_signed_8 (abfd
, buf
);
15993 static unsigned int
15994 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
15996 return bfd_get_16 (abfd
, buf
);
16000 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16002 return bfd_get_signed_16 (abfd
, buf
);
16005 static unsigned int
16006 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16008 return bfd_get_32 (abfd
, buf
);
16012 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16014 return bfd_get_signed_32 (abfd
, buf
);
16018 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16020 return bfd_get_64 (abfd
, buf
);
16024 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
16025 unsigned int *bytes_read
)
16027 struct comp_unit_head
*cu_header
= &cu
->header
;
16028 CORE_ADDR retval
= 0;
16030 if (cu_header
->signed_addr_p
)
16032 switch (cu_header
->addr_size
)
16035 retval
= bfd_get_signed_16 (abfd
, buf
);
16038 retval
= bfd_get_signed_32 (abfd
, buf
);
16041 retval
= bfd_get_signed_64 (abfd
, buf
);
16044 internal_error (__FILE__
, __LINE__
,
16045 _("read_address: bad switch, signed [in module %s]"),
16046 bfd_get_filename (abfd
));
16051 switch (cu_header
->addr_size
)
16054 retval
= bfd_get_16 (abfd
, buf
);
16057 retval
= bfd_get_32 (abfd
, buf
);
16060 retval
= bfd_get_64 (abfd
, buf
);
16063 internal_error (__FILE__
, __LINE__
,
16064 _("read_address: bad switch, "
16065 "unsigned [in module %s]"),
16066 bfd_get_filename (abfd
));
16070 *bytes_read
= cu_header
->addr_size
;
16074 /* Read the initial length from a section. The (draft) DWARF 3
16075 specification allows the initial length to take up either 4 bytes
16076 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
16077 bytes describe the length and all offsets will be 8 bytes in length
16080 An older, non-standard 64-bit format is also handled by this
16081 function. The older format in question stores the initial length
16082 as an 8-byte quantity without an escape value. Lengths greater
16083 than 2^32 aren't very common which means that the initial 4 bytes
16084 is almost always zero. Since a length value of zero doesn't make
16085 sense for the 32-bit format, this initial zero can be considered to
16086 be an escape value which indicates the presence of the older 64-bit
16087 format. As written, the code can't detect (old format) lengths
16088 greater than 4GB. If it becomes necessary to handle lengths
16089 somewhat larger than 4GB, we could allow other small values (such
16090 as the non-sensical values of 1, 2, and 3) to also be used as
16091 escape values indicating the presence of the old format.
16093 The value returned via bytes_read should be used to increment the
16094 relevant pointer after calling read_initial_length().
16096 [ Note: read_initial_length() and read_offset() are based on the
16097 document entitled "DWARF Debugging Information Format", revision
16098 3, draft 8, dated November 19, 2001. This document was obtained
16101 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
16103 This document is only a draft and is subject to change. (So beware.)
16105 Details regarding the older, non-standard 64-bit format were
16106 determined empirically by examining 64-bit ELF files produced by
16107 the SGI toolchain on an IRIX 6.5 machine.
16109 - Kevin, July 16, 2002
16113 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
16115 LONGEST length
= bfd_get_32 (abfd
, buf
);
16117 if (length
== 0xffffffff)
16119 length
= bfd_get_64 (abfd
, buf
+ 4);
16122 else if (length
== 0)
16124 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
16125 length
= bfd_get_64 (abfd
, buf
);
16136 /* Cover function for read_initial_length.
16137 Returns the length of the object at BUF, and stores the size of the
16138 initial length in *BYTES_READ and stores the size that offsets will be in
16140 If the initial length size is not equivalent to that specified in
16141 CU_HEADER then issue a complaint.
16142 This is useful when reading non-comp-unit headers. */
16145 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
16146 const struct comp_unit_head
*cu_header
,
16147 unsigned int *bytes_read
,
16148 unsigned int *offset_size
)
16150 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
16152 gdb_assert (cu_header
->initial_length_size
== 4
16153 || cu_header
->initial_length_size
== 8
16154 || cu_header
->initial_length_size
== 12);
16156 if (cu_header
->initial_length_size
!= *bytes_read
)
16157 complaint (&symfile_complaints
,
16158 _("intermixed 32-bit and 64-bit DWARF sections"));
16160 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
16164 /* Read an offset from the data stream. The size of the offset is
16165 given by cu_header->offset_size. */
16168 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
16169 const struct comp_unit_head
*cu_header
,
16170 unsigned int *bytes_read
)
16172 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
16174 *bytes_read
= cu_header
->offset_size
;
16178 /* Read an offset from the data stream. */
16181 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
16183 LONGEST retval
= 0;
16185 switch (offset_size
)
16188 retval
= bfd_get_32 (abfd
, buf
);
16191 retval
= bfd_get_64 (abfd
, buf
);
16194 internal_error (__FILE__
, __LINE__
,
16195 _("read_offset_1: bad switch [in module %s]"),
16196 bfd_get_filename (abfd
));
16202 static const gdb_byte
*
16203 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
16205 /* If the size of a host char is 8 bits, we can return a pointer
16206 to the buffer, otherwise we have to copy the data to a buffer
16207 allocated on the temporary obstack. */
16208 gdb_assert (HOST_CHAR_BIT
== 8);
16212 static const char *
16213 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
16214 unsigned int *bytes_read_ptr
)
16216 /* If the size of a host char is 8 bits, we can return a pointer
16217 to the string, otherwise we have to copy the string to a buffer
16218 allocated on the temporary obstack. */
16219 gdb_assert (HOST_CHAR_BIT
== 8);
16222 *bytes_read_ptr
= 1;
16225 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
16226 return (const char *) buf
;
16229 static const char *
16230 read_indirect_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
16232 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
16233 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
16234 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
16235 bfd_get_filename (abfd
));
16236 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
16237 error (_("DW_FORM_strp pointing outside of "
16238 ".debug_str section [in module %s]"),
16239 bfd_get_filename (abfd
));
16240 gdb_assert (HOST_CHAR_BIT
== 8);
16241 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
16243 return (const char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
16246 /* Read a string at offset STR_OFFSET in the .debug_str section from
16247 the .dwz file DWZ. Throw an error if the offset is too large. If
16248 the string consists of a single NUL byte, return NULL; otherwise
16249 return a pointer to the string. */
16251 static const char *
16252 read_indirect_string_from_dwz (struct dwz_file
*dwz
, LONGEST str_offset
)
16254 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwz
->str
);
16256 if (dwz
->str
.buffer
== NULL
)
16257 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
16258 "section [in module %s]"),
16259 bfd_get_filename (dwz
->dwz_bfd
));
16260 if (str_offset
>= dwz
->str
.size
)
16261 error (_("DW_FORM_GNU_strp_alt pointing outside of "
16262 ".debug_str section [in module %s]"),
16263 bfd_get_filename (dwz
->dwz_bfd
));
16264 gdb_assert (HOST_CHAR_BIT
== 8);
16265 if (dwz
->str
.buffer
[str_offset
] == '\0')
16267 return (const char *) (dwz
->str
.buffer
+ str_offset
);
16270 static const char *
16271 read_indirect_string (bfd
*abfd
, const gdb_byte
*buf
,
16272 const struct comp_unit_head
*cu_header
,
16273 unsigned int *bytes_read_ptr
)
16275 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
16277 return read_indirect_string_at_offset (abfd
, str_offset
);
16281 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
16282 unsigned int *bytes_read_ptr
)
16285 unsigned int num_read
;
16287 unsigned char byte
;
16295 byte
= bfd_get_8 (abfd
, buf
);
16298 result
|= ((ULONGEST
) (byte
& 127) << shift
);
16299 if ((byte
& 128) == 0)
16305 *bytes_read_ptr
= num_read
;
16310 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
16311 unsigned int *bytes_read_ptr
)
16314 int i
, shift
, num_read
;
16315 unsigned char byte
;
16323 byte
= bfd_get_8 (abfd
, buf
);
16326 result
|= ((LONGEST
) (byte
& 127) << shift
);
16328 if ((byte
& 128) == 0)
16333 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
16334 result
|= -(((LONGEST
) 1) << shift
);
16335 *bytes_read_ptr
= num_read
;
16339 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
16340 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
16341 ADDR_SIZE is the size of addresses from the CU header. */
16344 read_addr_index_1 (unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
16346 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16347 bfd
*abfd
= objfile
->obfd
;
16348 const gdb_byte
*info_ptr
;
16350 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
16351 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
16352 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
16353 objfile_name (objfile
));
16354 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
16355 error (_("DW_FORM_addr_index pointing outside of "
16356 ".debug_addr section [in module %s]"),
16357 objfile_name (objfile
));
16358 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
16359 + addr_base
+ addr_index
* addr_size
);
16360 if (addr_size
== 4)
16361 return bfd_get_32 (abfd
, info_ptr
);
16363 return bfd_get_64 (abfd
, info_ptr
);
16366 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
16369 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
16371 return read_addr_index_1 (addr_index
, cu
->addr_base
, cu
->header
.addr_size
);
16374 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
16377 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
16378 unsigned int *bytes_read
)
16380 bfd
*abfd
= cu
->objfile
->obfd
;
16381 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
16383 return read_addr_index (cu
, addr_index
);
16386 /* Data structure to pass results from dwarf2_read_addr_index_reader
16387 back to dwarf2_read_addr_index. */
16389 struct dwarf2_read_addr_index_data
16391 ULONGEST addr_base
;
16395 /* die_reader_func for dwarf2_read_addr_index. */
16398 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
16399 const gdb_byte
*info_ptr
,
16400 struct die_info
*comp_unit_die
,
16404 struct dwarf2_cu
*cu
= reader
->cu
;
16405 struct dwarf2_read_addr_index_data
*aidata
=
16406 (struct dwarf2_read_addr_index_data
*) data
;
16408 aidata
->addr_base
= cu
->addr_base
;
16409 aidata
->addr_size
= cu
->header
.addr_size
;
16412 /* Given an index in .debug_addr, fetch the value.
16413 NOTE: This can be called during dwarf expression evaluation,
16414 long after the debug information has been read, and thus per_cu->cu
16415 may no longer exist. */
16418 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
16419 unsigned int addr_index
)
16421 struct objfile
*objfile
= per_cu
->objfile
;
16422 struct dwarf2_cu
*cu
= per_cu
->cu
;
16423 ULONGEST addr_base
;
16426 /* This is intended to be called from outside this file. */
16427 dw2_setup (objfile
);
16429 /* We need addr_base and addr_size.
16430 If we don't have PER_CU->cu, we have to get it.
16431 Nasty, but the alternative is storing the needed info in PER_CU,
16432 which at this point doesn't seem justified: it's not clear how frequently
16433 it would get used and it would increase the size of every PER_CU.
16434 Entry points like dwarf2_per_cu_addr_size do a similar thing
16435 so we're not in uncharted territory here.
16436 Alas we need to be a bit more complicated as addr_base is contained
16439 We don't need to read the entire CU(/TU).
16440 We just need the header and top level die.
16442 IWBN to use the aging mechanism to let us lazily later discard the CU.
16443 For now we skip this optimization. */
16447 addr_base
= cu
->addr_base
;
16448 addr_size
= cu
->header
.addr_size
;
16452 struct dwarf2_read_addr_index_data aidata
;
16454 /* Note: We can't use init_cutu_and_read_dies_simple here,
16455 we need addr_base. */
16456 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
16457 dwarf2_read_addr_index_reader
, &aidata
);
16458 addr_base
= aidata
.addr_base
;
16459 addr_size
= aidata
.addr_size
;
16462 return read_addr_index_1 (addr_index
, addr_base
, addr_size
);
16465 /* Given a DW_FORM_GNU_str_index, fetch the string.
16466 This is only used by the Fission support. */
16468 static const char *
16469 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
16471 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16472 const char *objf_name
= objfile_name (objfile
);
16473 bfd
*abfd
= objfile
->obfd
;
16474 struct dwarf2_cu
*cu
= reader
->cu
;
16475 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
16476 struct dwarf2_section_info
*str_offsets_section
=
16477 &reader
->dwo_file
->sections
.str_offsets
;
16478 const gdb_byte
*info_ptr
;
16479 ULONGEST str_offset
;
16480 static const char form_name
[] = "DW_FORM_GNU_str_index";
16482 dwarf2_read_section (objfile
, str_section
);
16483 dwarf2_read_section (objfile
, str_offsets_section
);
16484 if (str_section
->buffer
== NULL
)
16485 error (_("%s used without .debug_str.dwo section"
16486 " in CU at offset 0x%lx [in module %s]"),
16487 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16488 if (str_offsets_section
->buffer
== NULL
)
16489 error (_("%s used without .debug_str_offsets.dwo section"
16490 " in CU at offset 0x%lx [in module %s]"),
16491 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16492 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
16493 error (_("%s pointing outside of .debug_str_offsets.dwo"
16494 " section in CU at offset 0x%lx [in module %s]"),
16495 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16496 info_ptr
= (str_offsets_section
->buffer
16497 + str_index
* cu
->header
.offset_size
);
16498 if (cu
->header
.offset_size
== 4)
16499 str_offset
= bfd_get_32 (abfd
, info_ptr
);
16501 str_offset
= bfd_get_64 (abfd
, info_ptr
);
16502 if (str_offset
>= str_section
->size
)
16503 error (_("Offset from %s pointing outside of"
16504 " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"),
16505 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16506 return (const char *) (str_section
->buffer
+ str_offset
);
16509 /* Return the length of an LEB128 number in BUF. */
16512 leb128_size (const gdb_byte
*buf
)
16514 const gdb_byte
*begin
= buf
;
16520 if ((byte
& 128) == 0)
16521 return buf
- begin
;
16526 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
16534 cu
->language
= language_c
;
16536 case DW_LANG_C_plus_plus
:
16537 cu
->language
= language_cplus
;
16540 cu
->language
= language_d
;
16542 case DW_LANG_Fortran77
:
16543 case DW_LANG_Fortran90
:
16544 case DW_LANG_Fortran95
:
16545 cu
->language
= language_fortran
;
16548 cu
->language
= language_go
;
16550 case DW_LANG_Mips_Assembler
:
16551 cu
->language
= language_asm
;
16554 cu
->language
= language_java
;
16556 case DW_LANG_Ada83
:
16557 case DW_LANG_Ada95
:
16558 cu
->language
= language_ada
;
16560 case DW_LANG_Modula2
:
16561 cu
->language
= language_m2
;
16563 case DW_LANG_Pascal83
:
16564 cu
->language
= language_pascal
;
16567 cu
->language
= language_objc
;
16569 case DW_LANG_Cobol74
:
16570 case DW_LANG_Cobol85
:
16572 cu
->language
= language_minimal
;
16575 cu
->language_defn
= language_def (cu
->language
);
16578 /* Return the named attribute or NULL if not there. */
16580 static struct attribute
*
16581 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
16586 struct attribute
*spec
= NULL
;
16588 for (i
= 0; i
< die
->num_attrs
; ++i
)
16590 if (die
->attrs
[i
].name
== name
)
16591 return &die
->attrs
[i
];
16592 if (die
->attrs
[i
].name
== DW_AT_specification
16593 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
16594 spec
= &die
->attrs
[i
];
16600 die
= follow_die_ref (die
, spec
, &cu
);
16606 /* Return the named attribute or NULL if not there,
16607 but do not follow DW_AT_specification, etc.
16608 This is for use in contexts where we're reading .debug_types dies.
16609 Following DW_AT_specification, DW_AT_abstract_origin will take us
16610 back up the chain, and we want to go down. */
16612 static struct attribute
*
16613 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
16617 for (i
= 0; i
< die
->num_attrs
; ++i
)
16618 if (die
->attrs
[i
].name
== name
)
16619 return &die
->attrs
[i
];
16624 /* Return non-zero iff the attribute NAME is defined for the given DIE,
16625 and holds a non-zero value. This function should only be used for
16626 DW_FORM_flag or DW_FORM_flag_present attributes. */
16629 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
16631 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
16633 return (attr
&& DW_UNSND (attr
));
16637 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
16639 /* A DIE is a declaration if it has a DW_AT_declaration attribute
16640 which value is non-zero. However, we have to be careful with
16641 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
16642 (via dwarf2_flag_true_p) follows this attribute. So we may
16643 end up accidently finding a declaration attribute that belongs
16644 to a different DIE referenced by the specification attribute,
16645 even though the given DIE does not have a declaration attribute. */
16646 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
16647 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
16650 /* Return the die giving the specification for DIE, if there is
16651 one. *SPEC_CU is the CU containing DIE on input, and the CU
16652 containing the return value on output. If there is no
16653 specification, but there is an abstract origin, that is
16656 static struct die_info
*
16657 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
16659 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
16662 if (spec_attr
== NULL
)
16663 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
16665 if (spec_attr
== NULL
)
16668 return follow_die_ref (die
, spec_attr
, spec_cu
);
16671 /* Free the line_header structure *LH, and any arrays and strings it
16673 NOTE: This is also used as a "cleanup" function. */
16676 free_line_header (struct line_header
*lh
)
16678 if (lh
->standard_opcode_lengths
)
16679 xfree (lh
->standard_opcode_lengths
);
16681 /* Remember that all the lh->file_names[i].name pointers are
16682 pointers into debug_line_buffer, and don't need to be freed. */
16683 if (lh
->file_names
)
16684 xfree (lh
->file_names
);
16686 /* Similarly for the include directory names. */
16687 if (lh
->include_dirs
)
16688 xfree (lh
->include_dirs
);
16693 /* Add an entry to LH's include directory table. */
16696 add_include_dir (struct line_header
*lh
, const char *include_dir
)
16698 /* Grow the array if necessary. */
16699 if (lh
->include_dirs_size
== 0)
16701 lh
->include_dirs_size
= 1; /* for testing */
16702 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
16703 * sizeof (*lh
->include_dirs
));
16705 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
16707 lh
->include_dirs_size
*= 2;
16708 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
16709 (lh
->include_dirs_size
16710 * sizeof (*lh
->include_dirs
)));
16713 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
16716 /* Add an entry to LH's file name table. */
16719 add_file_name (struct line_header
*lh
,
16721 unsigned int dir_index
,
16722 unsigned int mod_time
,
16723 unsigned int length
)
16725 struct file_entry
*fe
;
16727 /* Grow the array if necessary. */
16728 if (lh
->file_names_size
== 0)
16730 lh
->file_names_size
= 1; /* for testing */
16731 lh
->file_names
= xmalloc (lh
->file_names_size
16732 * sizeof (*lh
->file_names
));
16734 else if (lh
->num_file_names
>= lh
->file_names_size
)
16736 lh
->file_names_size
*= 2;
16737 lh
->file_names
= xrealloc (lh
->file_names
,
16738 (lh
->file_names_size
16739 * sizeof (*lh
->file_names
)));
16742 fe
= &lh
->file_names
[lh
->num_file_names
++];
16744 fe
->dir_index
= dir_index
;
16745 fe
->mod_time
= mod_time
;
16746 fe
->length
= length
;
16747 fe
->included_p
= 0;
16751 /* A convenience function to find the proper .debug_line section for a
16754 static struct dwarf2_section_info
*
16755 get_debug_line_section (struct dwarf2_cu
*cu
)
16757 struct dwarf2_section_info
*section
;
16759 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
16761 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
16762 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
16763 else if (cu
->per_cu
->is_dwz
)
16765 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
16767 section
= &dwz
->line
;
16770 section
= &dwarf2_per_objfile
->line
;
16775 /* Read the statement program header starting at OFFSET in
16776 .debug_line, or .debug_line.dwo. Return a pointer
16777 to a struct line_header, allocated using xmalloc.
16779 NOTE: the strings in the include directory and file name tables of
16780 the returned object point into the dwarf line section buffer,
16781 and must not be freed. */
16783 static struct line_header
*
16784 dwarf_decode_line_header (unsigned int offset
, struct dwarf2_cu
*cu
)
16786 struct cleanup
*back_to
;
16787 struct line_header
*lh
;
16788 const gdb_byte
*line_ptr
;
16789 unsigned int bytes_read
, offset_size
;
16791 const char *cur_dir
, *cur_file
;
16792 struct dwarf2_section_info
*section
;
16795 section
= get_debug_line_section (cu
);
16796 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
16797 if (section
->buffer
== NULL
)
16799 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
16800 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
16802 complaint (&symfile_complaints
, _("missing .debug_line section"));
16806 /* We can't do this until we know the section is non-empty.
16807 Only then do we know we have such a section. */
16808 abfd
= get_section_bfd_owner (section
);
16810 /* Make sure that at least there's room for the total_length field.
16811 That could be 12 bytes long, but we're just going to fudge that. */
16812 if (offset
+ 4 >= section
->size
)
16814 dwarf2_statement_list_fits_in_line_number_section_complaint ();
16818 lh
= xmalloc (sizeof (*lh
));
16819 memset (lh
, 0, sizeof (*lh
));
16820 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
16823 line_ptr
= section
->buffer
+ offset
;
16825 /* Read in the header. */
16827 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
16828 &bytes_read
, &offset_size
);
16829 line_ptr
+= bytes_read
;
16830 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
16832 dwarf2_statement_list_fits_in_line_number_section_complaint ();
16833 do_cleanups (back_to
);
16836 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
16837 lh
->version
= read_2_bytes (abfd
, line_ptr
);
16839 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
16840 line_ptr
+= offset_size
;
16841 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
16843 if (lh
->version
>= 4)
16845 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
16849 lh
->maximum_ops_per_instruction
= 1;
16851 if (lh
->maximum_ops_per_instruction
== 0)
16853 lh
->maximum_ops_per_instruction
= 1;
16854 complaint (&symfile_complaints
,
16855 _("invalid maximum_ops_per_instruction "
16856 "in `.debug_line' section"));
16859 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
16861 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
16863 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
16865 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
16867 lh
->standard_opcode_lengths
16868 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
16870 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
16871 for (i
= 1; i
< lh
->opcode_base
; ++i
)
16873 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
16877 /* Read directory table. */
16878 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
16880 line_ptr
+= bytes_read
;
16881 add_include_dir (lh
, cur_dir
);
16883 line_ptr
+= bytes_read
;
16885 /* Read file name table. */
16886 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
16888 unsigned int dir_index
, mod_time
, length
;
16890 line_ptr
+= bytes_read
;
16891 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
16892 line_ptr
+= bytes_read
;
16893 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
16894 line_ptr
+= bytes_read
;
16895 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
16896 line_ptr
+= bytes_read
;
16898 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
16900 line_ptr
+= bytes_read
;
16901 lh
->statement_program_start
= line_ptr
;
16903 if (line_ptr
> (section
->buffer
+ section
->size
))
16904 complaint (&symfile_complaints
,
16905 _("line number info header doesn't "
16906 "fit in `.debug_line' section"));
16908 discard_cleanups (back_to
);
16912 /* Subroutine of dwarf_decode_lines to simplify it.
16913 Return the file name of the psymtab for included file FILE_INDEX
16914 in line header LH of PST.
16915 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
16916 If space for the result is malloc'd, it will be freed by a cleanup.
16917 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename.
16919 The function creates dangling cleanup registration. */
16921 static const char *
16922 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
16923 const struct partial_symtab
*pst
,
16924 const char *comp_dir
)
16926 const struct file_entry fe
= lh
->file_names
[file_index
];
16927 const char *include_name
= fe
.name
;
16928 const char *include_name_to_compare
= include_name
;
16929 const char *dir_name
= NULL
;
16930 const char *pst_filename
;
16931 char *copied_name
= NULL
;
16935 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
16937 if (!IS_ABSOLUTE_PATH (include_name
)
16938 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
16940 /* Avoid creating a duplicate psymtab for PST.
16941 We do this by comparing INCLUDE_NAME and PST_FILENAME.
16942 Before we do the comparison, however, we need to account
16943 for DIR_NAME and COMP_DIR.
16944 First prepend dir_name (if non-NULL). If we still don't
16945 have an absolute path prepend comp_dir (if non-NULL).
16946 However, the directory we record in the include-file's
16947 psymtab does not contain COMP_DIR (to match the
16948 corresponding symtab(s)).
16953 bash$ gcc -g ./hello.c
16954 include_name = "hello.c"
16956 DW_AT_comp_dir = comp_dir = "/tmp"
16957 DW_AT_name = "./hello.c" */
16959 if (dir_name
!= NULL
)
16961 char *tem
= concat (dir_name
, SLASH_STRING
,
16962 include_name
, (char *)NULL
);
16964 make_cleanup (xfree
, tem
);
16965 include_name
= tem
;
16966 include_name_to_compare
= include_name
;
16968 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
16970 char *tem
= concat (comp_dir
, SLASH_STRING
,
16971 include_name
, (char *)NULL
);
16973 make_cleanup (xfree
, tem
);
16974 include_name_to_compare
= tem
;
16978 pst_filename
= pst
->filename
;
16979 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
16981 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
16982 pst_filename
, (char *)NULL
);
16983 pst_filename
= copied_name
;
16986 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
16988 if (copied_name
!= NULL
)
16989 xfree (copied_name
);
16993 return include_name
;
16996 /* Ignore this record_line request. */
16999 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
17004 /* Subroutine of dwarf_decode_lines to simplify it.
17005 Process the line number information in LH. */
17008 dwarf_decode_lines_1 (struct line_header
*lh
, const char *comp_dir
,
17009 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
17011 const gdb_byte
*line_ptr
, *extended_end
;
17012 const gdb_byte
*line_end
;
17013 unsigned int bytes_read
, extended_len
;
17014 unsigned char op_code
, extended_op
, adj_opcode
;
17015 CORE_ADDR baseaddr
;
17016 struct objfile
*objfile
= cu
->objfile
;
17017 bfd
*abfd
= objfile
->obfd
;
17018 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17019 const int decode_for_pst_p
= (pst
!= NULL
);
17020 struct subfile
*last_subfile
= NULL
;
17021 void (*p_record_line
) (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
17024 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
17026 line_ptr
= lh
->statement_program_start
;
17027 line_end
= lh
->statement_program_end
;
17029 /* Read the statement sequences until there's nothing left. */
17030 while (line_ptr
< line_end
)
17032 /* state machine registers */
17033 CORE_ADDR address
= 0;
17034 unsigned int file
= 1;
17035 unsigned int line
= 1;
17036 unsigned int column
= 0;
17037 int is_stmt
= lh
->default_is_stmt
;
17038 int basic_block
= 0;
17039 int end_sequence
= 0;
17041 unsigned char op_index
= 0;
17043 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
17045 /* Start a subfile for the current file of the state machine. */
17046 /* lh->include_dirs and lh->file_names are 0-based, but the
17047 directory and file name numbers in the statement program
17049 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
17050 const char *dir
= NULL
;
17053 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17055 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
17058 /* Decode the table. */
17059 while (!end_sequence
)
17061 op_code
= read_1_byte (abfd
, line_ptr
);
17063 if (line_ptr
> line_end
)
17065 dwarf2_debug_line_missing_end_sequence_complaint ();
17069 if (op_code
>= lh
->opcode_base
)
17071 /* Special operand. */
17072 adj_opcode
= op_code
- lh
->opcode_base
;
17073 address
+= (((op_index
+ (adj_opcode
/ lh
->line_range
))
17074 / lh
->maximum_ops_per_instruction
)
17075 * lh
->minimum_instruction_length
);
17076 op_index
= ((op_index
+ (adj_opcode
/ lh
->line_range
))
17077 % lh
->maximum_ops_per_instruction
);
17078 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
17079 if (lh
->num_file_names
< file
|| file
== 0)
17080 dwarf2_debug_line_missing_file_complaint ();
17081 /* For now we ignore lines not starting on an
17082 instruction boundary. */
17083 else if (op_index
== 0)
17085 lh
->file_names
[file
- 1].included_p
= 1;
17086 if (!decode_for_pst_p
&& is_stmt
)
17088 if (last_subfile
!= current_subfile
)
17090 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
17092 (*p_record_line
) (last_subfile
, 0, addr
);
17093 last_subfile
= current_subfile
;
17095 /* Append row to matrix using current values. */
17096 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
17097 (*p_record_line
) (current_subfile
, line
, addr
);
17102 else switch (op_code
)
17104 case DW_LNS_extended_op
:
17105 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
17107 line_ptr
+= bytes_read
;
17108 extended_end
= line_ptr
+ extended_len
;
17109 extended_op
= read_1_byte (abfd
, line_ptr
);
17111 switch (extended_op
)
17113 case DW_LNE_end_sequence
:
17114 p_record_line
= record_line
;
17117 case DW_LNE_set_address
:
17118 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
17120 if (address
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
17122 /* This line table is for a function which has been
17123 GCd by the linker. Ignore it. PR gdb/12528 */
17126 = line_ptr
- get_debug_line_section (cu
)->buffer
;
17128 complaint (&symfile_complaints
,
17129 _(".debug_line address at offset 0x%lx is 0 "
17131 line_offset
, objfile_name (objfile
));
17132 p_record_line
= noop_record_line
;
17136 line_ptr
+= bytes_read
;
17137 address
+= baseaddr
;
17139 case DW_LNE_define_file
:
17141 const char *cur_file
;
17142 unsigned int dir_index
, mod_time
, length
;
17144 cur_file
= read_direct_string (abfd
, line_ptr
,
17146 line_ptr
+= bytes_read
;
17148 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17149 line_ptr
+= bytes_read
;
17151 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17152 line_ptr
+= bytes_read
;
17154 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17155 line_ptr
+= bytes_read
;
17156 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
17159 case DW_LNE_set_discriminator
:
17160 /* The discriminator is not interesting to the debugger;
17162 line_ptr
= extended_end
;
17165 complaint (&symfile_complaints
,
17166 _("mangled .debug_line section"));
17169 /* Make sure that we parsed the extended op correctly. If e.g.
17170 we expected a different address size than the producer used,
17171 we may have read the wrong number of bytes. */
17172 if (line_ptr
!= extended_end
)
17174 complaint (&symfile_complaints
,
17175 _("mangled .debug_line section"));
17180 if (lh
->num_file_names
< file
|| file
== 0)
17181 dwarf2_debug_line_missing_file_complaint ();
17184 lh
->file_names
[file
- 1].included_p
= 1;
17185 if (!decode_for_pst_p
&& is_stmt
)
17187 if (last_subfile
!= current_subfile
)
17189 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
17191 (*p_record_line
) (last_subfile
, 0, addr
);
17192 last_subfile
= current_subfile
;
17194 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
17195 (*p_record_line
) (current_subfile
, line
, addr
);
17200 case DW_LNS_advance_pc
:
17203 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17205 address
+= (((op_index
+ adjust
)
17206 / lh
->maximum_ops_per_instruction
)
17207 * lh
->minimum_instruction_length
);
17208 op_index
= ((op_index
+ adjust
)
17209 % lh
->maximum_ops_per_instruction
);
17210 line_ptr
+= bytes_read
;
17213 case DW_LNS_advance_line
:
17214 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
17215 line_ptr
+= bytes_read
;
17217 case DW_LNS_set_file
:
17219 /* The arrays lh->include_dirs and lh->file_names are
17220 0-based, but the directory and file name numbers in
17221 the statement program are 1-based. */
17222 struct file_entry
*fe
;
17223 const char *dir
= NULL
;
17225 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17226 line_ptr
+= bytes_read
;
17227 if (lh
->num_file_names
< file
|| file
== 0)
17228 dwarf2_debug_line_missing_file_complaint ();
17231 fe
= &lh
->file_names
[file
- 1];
17233 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17234 if (!decode_for_pst_p
)
17236 last_subfile
= current_subfile
;
17237 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
17242 case DW_LNS_set_column
:
17243 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17244 line_ptr
+= bytes_read
;
17246 case DW_LNS_negate_stmt
:
17247 is_stmt
= (!is_stmt
);
17249 case DW_LNS_set_basic_block
:
17252 /* Add to the address register of the state machine the
17253 address increment value corresponding to special opcode
17254 255. I.e., this value is scaled by the minimum
17255 instruction length since special opcode 255 would have
17256 scaled the increment. */
17257 case DW_LNS_const_add_pc
:
17259 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
17261 address
+= (((op_index
+ adjust
)
17262 / lh
->maximum_ops_per_instruction
)
17263 * lh
->minimum_instruction_length
);
17264 op_index
= ((op_index
+ adjust
)
17265 % lh
->maximum_ops_per_instruction
);
17268 case DW_LNS_fixed_advance_pc
:
17269 address
+= read_2_bytes (abfd
, line_ptr
);
17275 /* Unknown standard opcode, ignore it. */
17278 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
17280 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17281 line_ptr
+= bytes_read
;
17286 if (lh
->num_file_names
< file
|| file
== 0)
17287 dwarf2_debug_line_missing_file_complaint ();
17290 lh
->file_names
[file
- 1].included_p
= 1;
17291 if (!decode_for_pst_p
)
17293 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
17294 (*p_record_line
) (current_subfile
, 0, addr
);
17300 /* Decode the Line Number Program (LNP) for the given line_header
17301 structure and CU. The actual information extracted and the type
17302 of structures created from the LNP depends on the value of PST.
17304 1. If PST is NULL, then this procedure uses the data from the program
17305 to create all necessary symbol tables, and their linetables.
17307 2. If PST is not NULL, this procedure reads the program to determine
17308 the list of files included by the unit represented by PST, and
17309 builds all the associated partial symbol tables.
17311 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
17312 It is used for relative paths in the line table.
17313 NOTE: When processing partial symtabs (pst != NULL),
17314 comp_dir == pst->dirname.
17316 NOTE: It is important that psymtabs have the same file name (via strcmp)
17317 as the corresponding symtab. Since COMP_DIR is not used in the name of the
17318 symtab we don't use it in the name of the psymtabs we create.
17319 E.g. expand_line_sal requires this when finding psymtabs to expand.
17320 A good testcase for this is mb-inline.exp. */
17323 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
17324 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
17325 int want_line_info
)
17327 struct objfile
*objfile
= cu
->objfile
;
17328 const int decode_for_pst_p
= (pst
!= NULL
);
17329 struct subfile
*first_subfile
= current_subfile
;
17331 if (want_line_info
)
17332 dwarf_decode_lines_1 (lh
, comp_dir
, cu
, pst
);
17334 if (decode_for_pst_p
)
17338 /* Now that we're done scanning the Line Header Program, we can
17339 create the psymtab of each included file. */
17340 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
17341 if (lh
->file_names
[file_index
].included_p
== 1)
17343 const char *include_name
=
17344 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
17345 if (include_name
!= NULL
)
17346 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
17351 /* Make sure a symtab is created for every file, even files
17352 which contain only variables (i.e. no code with associated
17356 for (i
= 0; i
< lh
->num_file_names
; i
++)
17358 const char *dir
= NULL
;
17359 struct file_entry
*fe
;
17361 fe
= &lh
->file_names
[i
];
17363 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17364 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
17366 /* Skip the main file; we don't need it, and it must be
17367 allocated last, so that it will show up before the
17368 non-primary symtabs in the objfile's symtab list. */
17369 if (current_subfile
== first_subfile
)
17372 if (current_subfile
->symtab
== NULL
)
17373 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
17375 fe
->symtab
= current_subfile
->symtab
;
17380 /* Start a subfile for DWARF. FILENAME is the name of the file and
17381 DIRNAME the name of the source directory which contains FILENAME
17382 or NULL if not known. COMP_DIR is the compilation directory for the
17383 linetable's compilation unit or NULL if not known.
17384 This routine tries to keep line numbers from identical absolute and
17385 relative file names in a common subfile.
17387 Using the `list' example from the GDB testsuite, which resides in
17388 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
17389 of /srcdir/list0.c yields the following debugging information for list0.c:
17391 DW_AT_name: /srcdir/list0.c
17392 DW_AT_comp_dir: /compdir
17393 files.files[0].name: list0.h
17394 files.files[0].dir: /srcdir
17395 files.files[1].name: list0.c
17396 files.files[1].dir: /srcdir
17398 The line number information for list0.c has to end up in a single
17399 subfile, so that `break /srcdir/list0.c:1' works as expected.
17400 start_subfile will ensure that this happens provided that we pass the
17401 concatenation of files.files[1].dir and files.files[1].name as the
17405 dwarf2_start_subfile (const char *filename
, const char *dirname
,
17406 const char *comp_dir
)
17410 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
17411 `start_symtab' will always pass the contents of DW_AT_comp_dir as
17412 second argument to start_subfile. To be consistent, we do the
17413 same here. In order not to lose the line information directory,
17414 we concatenate it to the filename when it makes sense.
17415 Note that the Dwarf3 standard says (speaking of filenames in line
17416 information): ``The directory index is ignored for file names
17417 that represent full path names''. Thus ignoring dirname in the
17418 `else' branch below isn't an issue. */
17420 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
17422 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
17426 start_subfile (filename
, comp_dir
);
17432 /* Start a symtab for DWARF.
17433 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
17436 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
17437 const char *name
, const char *comp_dir
, CORE_ADDR low_pc
)
17439 start_symtab (name
, comp_dir
, low_pc
);
17440 record_debugformat ("DWARF 2");
17441 record_producer (cu
->producer
);
17443 /* We assume that we're processing GCC output. */
17444 processing_gcc_compilation
= 2;
17446 cu
->processing_has_namespace_info
= 0;
17450 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
17451 struct dwarf2_cu
*cu
)
17453 struct objfile
*objfile
= cu
->objfile
;
17454 struct comp_unit_head
*cu_header
= &cu
->header
;
17456 /* NOTE drow/2003-01-30: There used to be a comment and some special
17457 code here to turn a symbol with DW_AT_external and a
17458 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
17459 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
17460 with some versions of binutils) where shared libraries could have
17461 relocations against symbols in their debug information - the
17462 minimal symbol would have the right address, but the debug info
17463 would not. It's no longer necessary, because we will explicitly
17464 apply relocations when we read in the debug information now. */
17466 /* A DW_AT_location attribute with no contents indicates that a
17467 variable has been optimized away. */
17468 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
17470 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
17474 /* Handle one degenerate form of location expression specially, to
17475 preserve GDB's previous behavior when section offsets are
17476 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
17477 then mark this symbol as LOC_STATIC. */
17479 if (attr_form_is_block (attr
)
17480 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
17481 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
17482 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
17483 && (DW_BLOCK (attr
)->size
17484 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
17486 unsigned int dummy
;
17488 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
17489 SYMBOL_VALUE_ADDRESS (sym
) =
17490 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
17492 SYMBOL_VALUE_ADDRESS (sym
) =
17493 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
17494 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
17495 fixup_symbol_section (sym
, objfile
);
17496 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
17497 SYMBOL_SECTION (sym
));
17501 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
17502 expression evaluator, and use LOC_COMPUTED only when necessary
17503 (i.e. when the value of a register or memory location is
17504 referenced, or a thread-local block, etc.). Then again, it might
17505 not be worthwhile. I'm assuming that it isn't unless performance
17506 or memory numbers show me otherwise. */
17508 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
17510 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
17511 cu
->has_loclist
= 1;
17514 /* Given a pointer to a DWARF information entry, figure out if we need
17515 to make a symbol table entry for it, and if so, create a new entry
17516 and return a pointer to it.
17517 If TYPE is NULL, determine symbol type from the die, otherwise
17518 used the passed type.
17519 If SPACE is not NULL, use it to hold the new symbol. If it is
17520 NULL, allocate a new symbol on the objfile's obstack. */
17522 static struct symbol
*
17523 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
17524 struct symbol
*space
)
17526 struct objfile
*objfile
= cu
->objfile
;
17527 struct symbol
*sym
= NULL
;
17529 struct attribute
*attr
= NULL
;
17530 struct attribute
*attr2
= NULL
;
17531 CORE_ADDR baseaddr
;
17532 struct pending
**list_to_add
= NULL
;
17534 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
17536 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
17538 name
= dwarf2_name (die
, cu
);
17541 const char *linkagename
;
17542 int suppress_add
= 0;
17547 sym
= allocate_symbol (objfile
);
17548 OBJSTAT (objfile
, n_syms
++);
17550 /* Cache this symbol's name and the name's demangled form (if any). */
17551 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
17552 linkagename
= dwarf2_physname (name
, die
, cu
);
17553 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
17555 /* Fortran does not have mangling standard and the mangling does differ
17556 between gfortran, iFort etc. */
17557 if (cu
->language
== language_fortran
17558 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
17559 symbol_set_demangled_name (&(sym
->ginfo
),
17560 dwarf2_full_name (name
, die
, cu
),
17563 /* Default assumptions.
17564 Use the passed type or decode it from the die. */
17565 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
17566 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
17568 SYMBOL_TYPE (sym
) = type
;
17570 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
17571 attr
= dwarf2_attr (die
,
17572 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
17576 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
17579 attr
= dwarf2_attr (die
,
17580 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
17584 int file_index
= DW_UNSND (attr
);
17586 if (cu
->line_header
== NULL
17587 || file_index
> cu
->line_header
->num_file_names
)
17588 complaint (&symfile_complaints
,
17589 _("file index out of range"));
17590 else if (file_index
> 0)
17592 struct file_entry
*fe
;
17594 fe
= &cu
->line_header
->file_names
[file_index
- 1];
17595 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
17602 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
17604 SYMBOL_VALUE_ADDRESS (sym
)
17605 = attr_value_as_address (attr
) + baseaddr
;
17606 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
17607 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
17608 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
17609 add_symbol_to_list (sym
, cu
->list_in_scope
);
17611 case DW_TAG_subprogram
:
17612 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
17614 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
17615 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
17616 if ((attr2
&& (DW_UNSND (attr2
) != 0))
17617 || cu
->language
== language_ada
)
17619 /* Subprograms marked external are stored as a global symbol.
17620 Ada subprograms, whether marked external or not, are always
17621 stored as a global symbol, because we want to be able to
17622 access them globally. For instance, we want to be able
17623 to break on a nested subprogram without having to
17624 specify the context. */
17625 list_to_add
= &global_symbols
;
17629 list_to_add
= cu
->list_in_scope
;
17632 case DW_TAG_inlined_subroutine
:
17633 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
17635 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
17636 SYMBOL_INLINED (sym
) = 1;
17637 list_to_add
= cu
->list_in_scope
;
17639 case DW_TAG_template_value_param
:
17641 /* Fall through. */
17642 case DW_TAG_constant
:
17643 case DW_TAG_variable
:
17644 case DW_TAG_member
:
17645 /* Compilation with minimal debug info may result in
17646 variables with missing type entries. Change the
17647 misleading `void' type to something sensible. */
17648 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
17650 = objfile_type (objfile
)->nodebug_data_symbol
;
17652 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
17653 /* In the case of DW_TAG_member, we should only be called for
17654 static const members. */
17655 if (die
->tag
== DW_TAG_member
)
17657 /* dwarf2_add_field uses die_is_declaration,
17658 so we do the same. */
17659 gdb_assert (die_is_declaration (die
, cu
));
17664 dwarf2_const_value (attr
, sym
, cu
);
17665 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
17668 if (attr2
&& (DW_UNSND (attr2
) != 0))
17669 list_to_add
= &global_symbols
;
17671 list_to_add
= cu
->list_in_scope
;
17675 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
17678 var_decode_location (attr
, sym
, cu
);
17679 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
17681 /* Fortran explicitly imports any global symbols to the local
17682 scope by DW_TAG_common_block. */
17683 if (cu
->language
== language_fortran
&& die
->parent
17684 && die
->parent
->tag
== DW_TAG_common_block
)
17687 if (SYMBOL_CLASS (sym
) == LOC_STATIC
17688 && SYMBOL_VALUE_ADDRESS (sym
) == 0
17689 && !dwarf2_per_objfile
->has_section_at_zero
)
17691 /* When a static variable is eliminated by the linker,
17692 the corresponding debug information is not stripped
17693 out, but the variable address is set to null;
17694 do not add such variables into symbol table. */
17696 else if (attr2
&& (DW_UNSND (attr2
) != 0))
17698 /* Workaround gfortran PR debug/40040 - it uses
17699 DW_AT_location for variables in -fPIC libraries which may
17700 get overriden by other libraries/executable and get
17701 a different address. Resolve it by the minimal symbol
17702 which may come from inferior's executable using copy
17703 relocation. Make this workaround only for gfortran as for
17704 other compilers GDB cannot guess the minimal symbol
17705 Fortran mangling kind. */
17706 if (cu
->language
== language_fortran
&& die
->parent
17707 && die
->parent
->tag
== DW_TAG_module
17709 && strncmp (cu
->producer
, "GNU Fortran ", 12) == 0)
17710 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
17712 /* A variable with DW_AT_external is never static,
17713 but it may be block-scoped. */
17714 list_to_add
= (cu
->list_in_scope
== &file_symbols
17715 ? &global_symbols
: cu
->list_in_scope
);
17718 list_to_add
= cu
->list_in_scope
;
17722 /* We do not know the address of this symbol.
17723 If it is an external symbol and we have type information
17724 for it, enter the symbol as a LOC_UNRESOLVED symbol.
17725 The address of the variable will then be determined from
17726 the minimal symbol table whenever the variable is
17728 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
17730 /* Fortran explicitly imports any global symbols to the local
17731 scope by DW_TAG_common_block. */
17732 if (cu
->language
== language_fortran
&& die
->parent
17733 && die
->parent
->tag
== DW_TAG_common_block
)
17735 /* SYMBOL_CLASS doesn't matter here because
17736 read_common_block is going to reset it. */
17738 list_to_add
= cu
->list_in_scope
;
17740 else if (attr2
&& (DW_UNSND (attr2
) != 0)
17741 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
17743 /* A variable with DW_AT_external is never static, but it
17744 may be block-scoped. */
17745 list_to_add
= (cu
->list_in_scope
== &file_symbols
17746 ? &global_symbols
: cu
->list_in_scope
);
17748 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
17750 else if (!die_is_declaration (die
, cu
))
17752 /* Use the default LOC_OPTIMIZED_OUT class. */
17753 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
17755 list_to_add
= cu
->list_in_scope
;
17759 case DW_TAG_formal_parameter
:
17760 /* If we are inside a function, mark this as an argument. If
17761 not, we might be looking at an argument to an inlined function
17762 when we do not have enough information to show inlined frames;
17763 pretend it's a local variable in that case so that the user can
17765 if (context_stack_depth
> 0
17766 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
17767 SYMBOL_IS_ARGUMENT (sym
) = 1;
17768 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
17771 var_decode_location (attr
, sym
, cu
);
17773 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
17776 dwarf2_const_value (attr
, sym
, cu
);
17779 list_to_add
= cu
->list_in_scope
;
17781 case DW_TAG_unspecified_parameters
:
17782 /* From varargs functions; gdb doesn't seem to have any
17783 interest in this information, so just ignore it for now.
17786 case DW_TAG_template_type_param
:
17788 /* Fall through. */
17789 case DW_TAG_class_type
:
17790 case DW_TAG_interface_type
:
17791 case DW_TAG_structure_type
:
17792 case DW_TAG_union_type
:
17793 case DW_TAG_set_type
:
17794 case DW_TAG_enumeration_type
:
17795 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
17796 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
17799 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
17800 really ever be static objects: otherwise, if you try
17801 to, say, break of a class's method and you're in a file
17802 which doesn't mention that class, it won't work unless
17803 the check for all static symbols in lookup_symbol_aux
17804 saves you. See the OtherFileClass tests in
17805 gdb.c++/namespace.exp. */
17809 list_to_add
= (cu
->list_in_scope
== &file_symbols
17810 && (cu
->language
== language_cplus
17811 || cu
->language
== language_java
)
17812 ? &global_symbols
: cu
->list_in_scope
);
17814 /* The semantics of C++ state that "struct foo {
17815 ... }" also defines a typedef for "foo". A Java
17816 class declaration also defines a typedef for the
17818 if (cu
->language
== language_cplus
17819 || cu
->language
== language_java
17820 || cu
->language
== language_ada
)
17822 /* The symbol's name is already allocated along
17823 with this objfile, so we don't need to
17824 duplicate it for the type. */
17825 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
17826 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
17831 case DW_TAG_typedef
:
17832 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
17833 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
17834 list_to_add
= cu
->list_in_scope
;
17836 case DW_TAG_base_type
:
17837 case DW_TAG_subrange_type
:
17838 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
17839 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
17840 list_to_add
= cu
->list_in_scope
;
17842 case DW_TAG_enumerator
:
17843 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
17846 dwarf2_const_value (attr
, sym
, cu
);
17849 /* NOTE: carlton/2003-11-10: See comment above in the
17850 DW_TAG_class_type, etc. block. */
17852 list_to_add
= (cu
->list_in_scope
== &file_symbols
17853 && (cu
->language
== language_cplus
17854 || cu
->language
== language_java
)
17855 ? &global_symbols
: cu
->list_in_scope
);
17858 case DW_TAG_imported_declaration
:
17859 case DW_TAG_namespace
:
17860 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
17861 list_to_add
= &global_symbols
;
17863 case DW_TAG_module
:
17864 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
17865 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
17866 list_to_add
= &global_symbols
;
17868 case DW_TAG_common_block
:
17869 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
17870 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
17871 add_symbol_to_list (sym
, cu
->list_in_scope
);
17874 /* Not a tag we recognize. Hopefully we aren't processing
17875 trash data, but since we must specifically ignore things
17876 we don't recognize, there is nothing else we should do at
17878 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
17879 dwarf_tag_name (die
->tag
));
17885 sym
->hash_next
= objfile
->template_symbols
;
17886 objfile
->template_symbols
= sym
;
17887 list_to_add
= NULL
;
17890 if (list_to_add
!= NULL
)
17891 add_symbol_to_list (sym
, list_to_add
);
17893 /* For the benefit of old versions of GCC, check for anonymous
17894 namespaces based on the demangled name. */
17895 if (!cu
->processing_has_namespace_info
17896 && cu
->language
== language_cplus
)
17897 cp_scan_for_anonymous_namespaces (sym
, objfile
);
17902 /* A wrapper for new_symbol_full that always allocates a new symbol. */
17904 static struct symbol
*
17905 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
17907 return new_symbol_full (die
, type
, cu
, NULL
);
17910 /* Given an attr with a DW_FORM_dataN value in host byte order,
17911 zero-extend it as appropriate for the symbol's type. The DWARF
17912 standard (v4) is not entirely clear about the meaning of using
17913 DW_FORM_dataN for a constant with a signed type, where the type is
17914 wider than the data. The conclusion of a discussion on the DWARF
17915 list was that this is unspecified. We choose to always zero-extend
17916 because that is the interpretation long in use by GCC. */
17919 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
17920 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
17922 struct objfile
*objfile
= cu
->objfile
;
17923 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
17924 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
17925 LONGEST l
= DW_UNSND (attr
);
17927 if (bits
< sizeof (*value
) * 8)
17929 l
&= ((LONGEST
) 1 << bits
) - 1;
17932 else if (bits
== sizeof (*value
) * 8)
17936 gdb_byte
*bytes
= obstack_alloc (obstack
, bits
/ 8);
17937 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
17944 /* Read a constant value from an attribute. Either set *VALUE, or if
17945 the value does not fit in *VALUE, set *BYTES - either already
17946 allocated on the objfile obstack, or newly allocated on OBSTACK,
17947 or, set *BATON, if we translated the constant to a location
17951 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
17952 const char *name
, struct obstack
*obstack
,
17953 struct dwarf2_cu
*cu
,
17954 LONGEST
*value
, const gdb_byte
**bytes
,
17955 struct dwarf2_locexpr_baton
**baton
)
17957 struct objfile
*objfile
= cu
->objfile
;
17958 struct comp_unit_head
*cu_header
= &cu
->header
;
17959 struct dwarf_block
*blk
;
17960 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
17961 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
17967 switch (attr
->form
)
17970 case DW_FORM_GNU_addr_index
:
17974 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
17975 dwarf2_const_value_length_mismatch_complaint (name
,
17976 cu_header
->addr_size
,
17977 TYPE_LENGTH (type
));
17978 /* Symbols of this form are reasonably rare, so we just
17979 piggyback on the existing location code rather than writing
17980 a new implementation of symbol_computed_ops. */
17981 *baton
= obstack_alloc (obstack
, sizeof (struct dwarf2_locexpr_baton
));
17982 (*baton
)->per_cu
= cu
->per_cu
;
17983 gdb_assert ((*baton
)->per_cu
);
17985 (*baton
)->size
= 2 + cu_header
->addr_size
;
17986 data
= obstack_alloc (obstack
, (*baton
)->size
);
17987 (*baton
)->data
= data
;
17989 data
[0] = DW_OP_addr
;
17990 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
17991 byte_order
, DW_ADDR (attr
));
17992 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
17995 case DW_FORM_string
:
17997 case DW_FORM_GNU_str_index
:
17998 case DW_FORM_GNU_strp_alt
:
17999 /* DW_STRING is already allocated on the objfile obstack, point
18001 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
18003 case DW_FORM_block1
:
18004 case DW_FORM_block2
:
18005 case DW_FORM_block4
:
18006 case DW_FORM_block
:
18007 case DW_FORM_exprloc
:
18008 blk
= DW_BLOCK (attr
);
18009 if (TYPE_LENGTH (type
) != blk
->size
)
18010 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
18011 TYPE_LENGTH (type
));
18012 *bytes
= blk
->data
;
18015 /* The DW_AT_const_value attributes are supposed to carry the
18016 symbol's value "represented as it would be on the target
18017 architecture." By the time we get here, it's already been
18018 converted to host endianness, so we just need to sign- or
18019 zero-extend it as appropriate. */
18020 case DW_FORM_data1
:
18021 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
18023 case DW_FORM_data2
:
18024 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
18026 case DW_FORM_data4
:
18027 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
18029 case DW_FORM_data8
:
18030 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
18033 case DW_FORM_sdata
:
18034 *value
= DW_SND (attr
);
18037 case DW_FORM_udata
:
18038 *value
= DW_UNSND (attr
);
18042 complaint (&symfile_complaints
,
18043 _("unsupported const value attribute form: '%s'"),
18044 dwarf_form_name (attr
->form
));
18051 /* Copy constant value from an attribute to a symbol. */
18054 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
18055 struct dwarf2_cu
*cu
)
18057 struct objfile
*objfile
= cu
->objfile
;
18058 struct comp_unit_head
*cu_header
= &cu
->header
;
18060 const gdb_byte
*bytes
;
18061 struct dwarf2_locexpr_baton
*baton
;
18063 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
18064 SYMBOL_PRINT_NAME (sym
),
18065 &objfile
->objfile_obstack
, cu
,
18066 &value
, &bytes
, &baton
);
18070 SYMBOL_LOCATION_BATON (sym
) = baton
;
18071 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
18073 else if (bytes
!= NULL
)
18075 SYMBOL_VALUE_BYTES (sym
) = bytes
;
18076 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
18080 SYMBOL_VALUE (sym
) = value
;
18081 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
18085 /* Return the type of the die in question using its DW_AT_type attribute. */
18087 static struct type
*
18088 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18090 struct attribute
*type_attr
;
18092 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
18095 /* A missing DW_AT_type represents a void type. */
18096 return objfile_type (cu
->objfile
)->builtin_void
;
18099 return lookup_die_type (die
, type_attr
, cu
);
18102 /* True iff CU's producer generates GNAT Ada auxiliary information
18103 that allows to find parallel types through that information instead
18104 of having to do expensive parallel lookups by type name. */
18107 need_gnat_info (struct dwarf2_cu
*cu
)
18109 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
18110 of GNAT produces this auxiliary information, without any indication
18111 that it is produced. Part of enhancing the FSF version of GNAT
18112 to produce that information will be to put in place an indicator
18113 that we can use in order to determine whether the descriptive type
18114 info is available or not. One suggestion that has been made is
18115 to use a new attribute, attached to the CU die. For now, assume
18116 that the descriptive type info is not available. */
18120 /* Return the auxiliary type of the die in question using its
18121 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
18122 attribute is not present. */
18124 static struct type
*
18125 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18127 struct attribute
*type_attr
;
18129 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
18133 return lookup_die_type (die
, type_attr
, cu
);
18136 /* If DIE has a descriptive_type attribute, then set the TYPE's
18137 descriptive type accordingly. */
18140 set_descriptive_type (struct type
*type
, struct die_info
*die
,
18141 struct dwarf2_cu
*cu
)
18143 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
18145 if (descriptive_type
)
18147 ALLOCATE_GNAT_AUX_TYPE (type
);
18148 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
18152 /* Return the containing type of the die in question using its
18153 DW_AT_containing_type attribute. */
18155 static struct type
*
18156 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18158 struct attribute
*type_attr
;
18160 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
18162 error (_("Dwarf Error: Problem turning containing type into gdb type "
18163 "[in module %s]"), objfile_name (cu
->objfile
));
18165 return lookup_die_type (die
, type_attr
, cu
);
18168 /* Return an error marker type to use for the ill formed type in DIE/CU. */
18170 static struct type
*
18171 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
18173 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18174 char *message
, *saved
;
18176 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
18177 objfile_name (objfile
),
18178 cu
->header
.offset
.sect_off
,
18179 die
->offset
.sect_off
);
18180 saved
= obstack_copy0 (&objfile
->objfile_obstack
,
18181 message
, strlen (message
));
18184 return init_type (TYPE_CODE_ERROR
, 0, 0, saved
, objfile
);
18187 /* Look up the type of DIE in CU using its type attribute ATTR.
18188 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
18189 DW_AT_containing_type.
18190 If there is no type substitute an error marker. */
18192 static struct type
*
18193 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
18194 struct dwarf2_cu
*cu
)
18196 struct objfile
*objfile
= cu
->objfile
;
18197 struct type
*this_type
;
18199 gdb_assert (attr
->name
== DW_AT_type
18200 || attr
->name
== DW_AT_GNAT_descriptive_type
18201 || attr
->name
== DW_AT_containing_type
);
18203 /* First see if we have it cached. */
18205 if (attr
->form
== DW_FORM_GNU_ref_alt
)
18207 struct dwarf2_per_cu_data
*per_cu
;
18208 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
18210 per_cu
= dwarf2_find_containing_comp_unit (offset
, 1, cu
->objfile
);
18211 this_type
= get_die_type_at_offset (offset
, per_cu
);
18213 else if (attr_form_is_ref (attr
))
18215 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
18217 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
18219 else if (attr
->form
== DW_FORM_ref_sig8
)
18221 ULONGEST signature
= DW_SIGNATURE (attr
);
18223 return get_signatured_type (die
, signature
, cu
);
18227 complaint (&symfile_complaints
,
18228 _("Dwarf Error: Bad type attribute %s in DIE"
18229 " at 0x%x [in module %s]"),
18230 dwarf_attr_name (attr
->name
), die
->offset
.sect_off
,
18231 objfile_name (objfile
));
18232 return build_error_marker_type (cu
, die
);
18235 /* If not cached we need to read it in. */
18237 if (this_type
== NULL
)
18239 struct die_info
*type_die
= NULL
;
18240 struct dwarf2_cu
*type_cu
= cu
;
18242 if (attr_form_is_ref (attr
))
18243 type_die
= follow_die_ref (die
, attr
, &type_cu
);
18244 if (type_die
== NULL
)
18245 return build_error_marker_type (cu
, die
);
18246 /* If we find the type now, it's probably because the type came
18247 from an inter-CU reference and the type's CU got expanded before
18249 this_type
= read_type_die (type_die
, type_cu
);
18252 /* If we still don't have a type use an error marker. */
18254 if (this_type
== NULL
)
18255 return build_error_marker_type (cu
, die
);
18260 /* Return the type in DIE, CU.
18261 Returns NULL for invalid types.
18263 This first does a lookup in die_type_hash,
18264 and only reads the die in if necessary.
18266 NOTE: This can be called when reading in partial or full symbols. */
18268 static struct type
*
18269 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
18271 struct type
*this_type
;
18273 this_type
= get_die_type (die
, cu
);
18277 return read_type_die_1 (die
, cu
);
18280 /* Read the type in DIE, CU.
18281 Returns NULL for invalid types. */
18283 static struct type
*
18284 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
18286 struct type
*this_type
= NULL
;
18290 case DW_TAG_class_type
:
18291 case DW_TAG_interface_type
:
18292 case DW_TAG_structure_type
:
18293 case DW_TAG_union_type
:
18294 this_type
= read_structure_type (die
, cu
);
18296 case DW_TAG_enumeration_type
:
18297 this_type
= read_enumeration_type (die
, cu
);
18299 case DW_TAG_subprogram
:
18300 case DW_TAG_subroutine_type
:
18301 case DW_TAG_inlined_subroutine
:
18302 this_type
= read_subroutine_type (die
, cu
);
18304 case DW_TAG_array_type
:
18305 this_type
= read_array_type (die
, cu
);
18307 case DW_TAG_set_type
:
18308 this_type
= read_set_type (die
, cu
);
18310 case DW_TAG_pointer_type
:
18311 this_type
= read_tag_pointer_type (die
, cu
);
18313 case DW_TAG_ptr_to_member_type
:
18314 this_type
= read_tag_ptr_to_member_type (die
, cu
);
18316 case DW_TAG_reference_type
:
18317 this_type
= read_tag_reference_type (die
, cu
);
18319 case DW_TAG_const_type
:
18320 this_type
= read_tag_const_type (die
, cu
);
18322 case DW_TAG_volatile_type
:
18323 this_type
= read_tag_volatile_type (die
, cu
);
18325 case DW_TAG_restrict_type
:
18326 this_type
= read_tag_restrict_type (die
, cu
);
18328 case DW_TAG_string_type
:
18329 this_type
= read_tag_string_type (die
, cu
);
18331 case DW_TAG_typedef
:
18332 this_type
= read_typedef (die
, cu
);
18334 case DW_TAG_subrange_type
:
18335 this_type
= read_subrange_type (die
, cu
);
18337 case DW_TAG_base_type
:
18338 this_type
= read_base_type (die
, cu
);
18340 case DW_TAG_unspecified_type
:
18341 this_type
= read_unspecified_type (die
, cu
);
18343 case DW_TAG_namespace
:
18344 this_type
= read_namespace_type (die
, cu
);
18346 case DW_TAG_module
:
18347 this_type
= read_module_type (die
, cu
);
18350 complaint (&symfile_complaints
,
18351 _("unexpected tag in read_type_die: '%s'"),
18352 dwarf_tag_name (die
->tag
));
18359 /* See if we can figure out if the class lives in a namespace. We do
18360 this by looking for a member function; its demangled name will
18361 contain namespace info, if there is any.
18362 Return the computed name or NULL.
18363 Space for the result is allocated on the objfile's obstack.
18364 This is the full-die version of guess_partial_die_structure_name.
18365 In this case we know DIE has no useful parent. */
18368 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
18370 struct die_info
*spec_die
;
18371 struct dwarf2_cu
*spec_cu
;
18372 struct die_info
*child
;
18375 spec_die
= die_specification (die
, &spec_cu
);
18376 if (spec_die
!= NULL
)
18382 for (child
= die
->child
;
18384 child
= child
->sibling
)
18386 if (child
->tag
== DW_TAG_subprogram
)
18388 struct attribute
*attr
;
18390 attr
= dwarf2_attr (child
, DW_AT_linkage_name
, cu
);
18392 attr
= dwarf2_attr (child
, DW_AT_MIPS_linkage_name
, cu
);
18396 = language_class_name_from_physname (cu
->language_defn
,
18400 if (actual_name
!= NULL
)
18402 const char *die_name
= dwarf2_name (die
, cu
);
18404 if (die_name
!= NULL
18405 && strcmp (die_name
, actual_name
) != 0)
18407 /* Strip off the class name from the full name.
18408 We want the prefix. */
18409 int die_name_len
= strlen (die_name
);
18410 int actual_name_len
= strlen (actual_name
);
18412 /* Test for '::' as a sanity check. */
18413 if (actual_name_len
> die_name_len
+ 2
18414 && actual_name
[actual_name_len
18415 - die_name_len
- 1] == ':')
18417 obstack_copy0 (&cu
->objfile
->objfile_obstack
,
18419 actual_name_len
- die_name_len
- 2);
18422 xfree (actual_name
);
18431 /* GCC might emit a nameless typedef that has a linkage name. Determine the
18432 prefix part in such case. See
18433 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
18436 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
18438 struct attribute
*attr
;
18441 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
18442 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
18445 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
18446 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
18449 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
18451 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
18452 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
18455 /* dwarf2_name had to be already called. */
18456 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
18458 /* Strip the base name, keep any leading namespaces/classes. */
18459 base
= strrchr (DW_STRING (attr
), ':');
18460 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
18463 return obstack_copy0 (&cu
->objfile
->objfile_obstack
,
18464 DW_STRING (attr
), &base
[-1] - DW_STRING (attr
));
18467 /* Return the name of the namespace/class that DIE is defined within,
18468 or "" if we can't tell. The caller should not xfree the result.
18470 For example, if we're within the method foo() in the following
18480 then determine_prefix on foo's die will return "N::C". */
18482 static const char *
18483 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
18485 struct die_info
*parent
, *spec_die
;
18486 struct dwarf2_cu
*spec_cu
;
18487 struct type
*parent_type
;
18490 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
18491 && cu
->language
!= language_fortran
)
18494 retval
= anonymous_struct_prefix (die
, cu
);
18498 /* We have to be careful in the presence of DW_AT_specification.
18499 For example, with GCC 3.4, given the code
18503 // Definition of N::foo.
18507 then we'll have a tree of DIEs like this:
18509 1: DW_TAG_compile_unit
18510 2: DW_TAG_namespace // N
18511 3: DW_TAG_subprogram // declaration of N::foo
18512 4: DW_TAG_subprogram // definition of N::foo
18513 DW_AT_specification // refers to die #3
18515 Thus, when processing die #4, we have to pretend that we're in
18516 the context of its DW_AT_specification, namely the contex of die
18519 spec_die
= die_specification (die
, &spec_cu
);
18520 if (spec_die
== NULL
)
18521 parent
= die
->parent
;
18524 parent
= spec_die
->parent
;
18528 if (parent
== NULL
)
18530 else if (parent
->building_fullname
)
18533 const char *parent_name
;
18535 /* It has been seen on RealView 2.2 built binaries,
18536 DW_TAG_template_type_param types actually _defined_ as
18537 children of the parent class:
18540 template class <class Enum> Class{};
18541 Class<enum E> class_e;
18543 1: DW_TAG_class_type (Class)
18544 2: DW_TAG_enumeration_type (E)
18545 3: DW_TAG_enumerator (enum1:0)
18546 3: DW_TAG_enumerator (enum2:1)
18548 2: DW_TAG_template_type_param
18549 DW_AT_type DW_FORM_ref_udata (E)
18551 Besides being broken debug info, it can put GDB into an
18552 infinite loop. Consider:
18554 When we're building the full name for Class<E>, we'll start
18555 at Class, and go look over its template type parameters,
18556 finding E. We'll then try to build the full name of E, and
18557 reach here. We're now trying to build the full name of E,
18558 and look over the parent DIE for containing scope. In the
18559 broken case, if we followed the parent DIE of E, we'd again
18560 find Class, and once again go look at its template type
18561 arguments, etc., etc. Simply don't consider such parent die
18562 as source-level parent of this die (it can't be, the language
18563 doesn't allow it), and break the loop here. */
18564 name
= dwarf2_name (die
, cu
);
18565 parent_name
= dwarf2_name (parent
, cu
);
18566 complaint (&symfile_complaints
,
18567 _("template param type '%s' defined within parent '%s'"),
18568 name
? name
: "<unknown>",
18569 parent_name
? parent_name
: "<unknown>");
18573 switch (parent
->tag
)
18575 case DW_TAG_namespace
:
18576 parent_type
= read_type_die (parent
, cu
);
18577 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
18578 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
18579 Work around this problem here. */
18580 if (cu
->language
== language_cplus
18581 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
18583 /* We give a name to even anonymous namespaces. */
18584 return TYPE_TAG_NAME (parent_type
);
18585 case DW_TAG_class_type
:
18586 case DW_TAG_interface_type
:
18587 case DW_TAG_structure_type
:
18588 case DW_TAG_union_type
:
18589 case DW_TAG_module
:
18590 parent_type
= read_type_die (parent
, cu
);
18591 if (TYPE_TAG_NAME (parent_type
) != NULL
)
18592 return TYPE_TAG_NAME (parent_type
);
18594 /* An anonymous structure is only allowed non-static data
18595 members; no typedefs, no member functions, et cetera.
18596 So it does not need a prefix. */
18598 case DW_TAG_compile_unit
:
18599 case DW_TAG_partial_unit
:
18600 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
18601 if (cu
->language
== language_cplus
18602 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
18603 && die
->child
!= NULL
18604 && (die
->tag
== DW_TAG_class_type
18605 || die
->tag
== DW_TAG_structure_type
18606 || die
->tag
== DW_TAG_union_type
))
18608 char *name
= guess_full_die_structure_name (die
, cu
);
18613 case DW_TAG_enumeration_type
:
18614 parent_type
= read_type_die (parent
, cu
);
18615 if (TYPE_DECLARED_CLASS (parent_type
))
18617 if (TYPE_TAG_NAME (parent_type
) != NULL
)
18618 return TYPE_TAG_NAME (parent_type
);
18621 /* Fall through. */
18623 return determine_prefix (parent
, cu
);
18627 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
18628 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
18629 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
18630 an obconcat, otherwise allocate storage for the result. The CU argument is
18631 used to determine the language and hence, the appropriate separator. */
18633 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
18636 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
18637 int physname
, struct dwarf2_cu
*cu
)
18639 const char *lead
= "";
18642 if (suffix
== NULL
|| suffix
[0] == '\0'
18643 || prefix
== NULL
|| prefix
[0] == '\0')
18645 else if (cu
->language
== language_java
)
18647 else if (cu
->language
== language_fortran
&& physname
)
18649 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
18650 DW_AT_MIPS_linkage_name is preferred and used instead. */
18658 if (prefix
== NULL
)
18660 if (suffix
== NULL
)
18666 = xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
18668 strcpy (retval
, lead
);
18669 strcat (retval
, prefix
);
18670 strcat (retval
, sep
);
18671 strcat (retval
, suffix
);
18676 /* We have an obstack. */
18677 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
18681 /* Return sibling of die, NULL if no sibling. */
18683 static struct die_info
*
18684 sibling_die (struct die_info
*die
)
18686 return die
->sibling
;
18689 /* Get name of a die, return NULL if not found. */
18691 static const char *
18692 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
18693 struct obstack
*obstack
)
18695 if (name
&& cu
->language
== language_cplus
)
18697 char *canon_name
= cp_canonicalize_string (name
);
18699 if (canon_name
!= NULL
)
18701 if (strcmp (canon_name
, name
) != 0)
18702 name
= obstack_copy0 (obstack
, canon_name
, strlen (canon_name
));
18703 xfree (canon_name
);
18710 /* Get name of a die, return NULL if not found. */
18712 static const char *
18713 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
18715 struct attribute
*attr
;
18717 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
18718 if ((!attr
|| !DW_STRING (attr
))
18719 && die
->tag
!= DW_TAG_class_type
18720 && die
->tag
!= DW_TAG_interface_type
18721 && die
->tag
!= DW_TAG_structure_type
18722 && die
->tag
!= DW_TAG_union_type
)
18727 case DW_TAG_compile_unit
:
18728 case DW_TAG_partial_unit
:
18729 /* Compilation units have a DW_AT_name that is a filename, not
18730 a source language identifier. */
18731 case DW_TAG_enumeration_type
:
18732 case DW_TAG_enumerator
:
18733 /* These tags always have simple identifiers already; no need
18734 to canonicalize them. */
18735 return DW_STRING (attr
);
18737 case DW_TAG_subprogram
:
18738 /* Java constructors will all be named "<init>", so return
18739 the class name when we see this special case. */
18740 if (cu
->language
== language_java
18741 && DW_STRING (attr
) != NULL
18742 && strcmp (DW_STRING (attr
), "<init>") == 0)
18744 struct dwarf2_cu
*spec_cu
= cu
;
18745 struct die_info
*spec_die
;
18747 /* GCJ will output '<init>' for Java constructor names.
18748 For this special case, return the name of the parent class. */
18750 /* GCJ may output suprogram DIEs with AT_specification set.
18751 If so, use the name of the specified DIE. */
18752 spec_die
= die_specification (die
, &spec_cu
);
18753 if (spec_die
!= NULL
)
18754 return dwarf2_name (spec_die
, spec_cu
);
18759 if (die
->tag
== DW_TAG_class_type
)
18760 return dwarf2_name (die
, cu
);
18762 while (die
->tag
!= DW_TAG_compile_unit
18763 && die
->tag
!= DW_TAG_partial_unit
);
18767 case DW_TAG_class_type
:
18768 case DW_TAG_interface_type
:
18769 case DW_TAG_structure_type
:
18770 case DW_TAG_union_type
:
18771 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
18772 structures or unions. These were of the form "._%d" in GCC 4.1,
18773 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
18774 and GCC 4.4. We work around this problem by ignoring these. */
18775 if (attr
&& DW_STRING (attr
)
18776 && (strncmp (DW_STRING (attr
), "._", 2) == 0
18777 || strncmp (DW_STRING (attr
), "<anonymous", 10) == 0))
18780 /* GCC might emit a nameless typedef that has a linkage name. See
18781 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
18782 if (!attr
|| DW_STRING (attr
) == NULL
)
18784 char *demangled
= NULL
;
18786 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
18788 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
18790 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
18793 /* Avoid demangling DW_STRING (attr) the second time on a second
18794 call for the same DIE. */
18795 if (!DW_STRING_IS_CANONICAL (attr
))
18796 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
18802 /* FIXME: we already did this for the partial symbol... */
18803 DW_STRING (attr
) = obstack_copy0 (&cu
->objfile
->objfile_obstack
,
18804 demangled
, strlen (demangled
));
18805 DW_STRING_IS_CANONICAL (attr
) = 1;
18808 /* Strip any leading namespaces/classes, keep only the base name.
18809 DW_AT_name for named DIEs does not contain the prefixes. */
18810 base
= strrchr (DW_STRING (attr
), ':');
18811 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
18814 return DW_STRING (attr
);
18823 if (!DW_STRING_IS_CANONICAL (attr
))
18826 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
18827 &cu
->objfile
->objfile_obstack
);
18828 DW_STRING_IS_CANONICAL (attr
) = 1;
18830 return DW_STRING (attr
);
18833 /* Return the die that this die in an extension of, or NULL if there
18834 is none. *EXT_CU is the CU containing DIE on input, and the CU
18835 containing the return value on output. */
18837 static struct die_info
*
18838 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
18840 struct attribute
*attr
;
18842 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
18846 return follow_die_ref (die
, attr
, ext_cu
);
18849 /* Convert a DIE tag into its string name. */
18851 static const char *
18852 dwarf_tag_name (unsigned tag
)
18854 const char *name
= get_DW_TAG_name (tag
);
18857 return "DW_TAG_<unknown>";
18862 /* Convert a DWARF attribute code into its string name. */
18864 static const char *
18865 dwarf_attr_name (unsigned attr
)
18869 #ifdef MIPS /* collides with DW_AT_HP_block_index */
18870 if (attr
== DW_AT_MIPS_fde
)
18871 return "DW_AT_MIPS_fde";
18873 if (attr
== DW_AT_HP_block_index
)
18874 return "DW_AT_HP_block_index";
18877 name
= get_DW_AT_name (attr
);
18880 return "DW_AT_<unknown>";
18885 /* Convert a DWARF value form code into its string name. */
18887 static const char *
18888 dwarf_form_name (unsigned form
)
18890 const char *name
= get_DW_FORM_name (form
);
18893 return "DW_FORM_<unknown>";
18899 dwarf_bool_name (unsigned mybool
)
18907 /* Convert a DWARF type code into its string name. */
18909 static const char *
18910 dwarf_type_encoding_name (unsigned enc
)
18912 const char *name
= get_DW_ATE_name (enc
);
18915 return "DW_ATE_<unknown>";
18921 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
18925 print_spaces (indent
, f
);
18926 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
18927 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
.sect_off
);
18929 if (die
->parent
!= NULL
)
18931 print_spaces (indent
, f
);
18932 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
18933 die
->parent
->offset
.sect_off
);
18936 print_spaces (indent
, f
);
18937 fprintf_unfiltered (f
, " has children: %s\n",
18938 dwarf_bool_name (die
->child
!= NULL
));
18940 print_spaces (indent
, f
);
18941 fprintf_unfiltered (f
, " attributes:\n");
18943 for (i
= 0; i
< die
->num_attrs
; ++i
)
18945 print_spaces (indent
, f
);
18946 fprintf_unfiltered (f
, " %s (%s) ",
18947 dwarf_attr_name (die
->attrs
[i
].name
),
18948 dwarf_form_name (die
->attrs
[i
].form
));
18950 switch (die
->attrs
[i
].form
)
18953 case DW_FORM_GNU_addr_index
:
18954 fprintf_unfiltered (f
, "address: ");
18955 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
18957 case DW_FORM_block2
:
18958 case DW_FORM_block4
:
18959 case DW_FORM_block
:
18960 case DW_FORM_block1
:
18961 fprintf_unfiltered (f
, "block: size %s",
18962 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
18964 case DW_FORM_exprloc
:
18965 fprintf_unfiltered (f
, "expression: size %s",
18966 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
18968 case DW_FORM_ref_addr
:
18969 fprintf_unfiltered (f
, "ref address: ");
18970 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
18972 case DW_FORM_GNU_ref_alt
:
18973 fprintf_unfiltered (f
, "alt ref address: ");
18974 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
18980 case DW_FORM_ref_udata
:
18981 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
18982 (long) (DW_UNSND (&die
->attrs
[i
])));
18984 case DW_FORM_data1
:
18985 case DW_FORM_data2
:
18986 case DW_FORM_data4
:
18987 case DW_FORM_data8
:
18988 case DW_FORM_udata
:
18989 case DW_FORM_sdata
:
18990 fprintf_unfiltered (f
, "constant: %s",
18991 pulongest (DW_UNSND (&die
->attrs
[i
])));
18993 case DW_FORM_sec_offset
:
18994 fprintf_unfiltered (f
, "section offset: %s",
18995 pulongest (DW_UNSND (&die
->attrs
[i
])));
18997 case DW_FORM_ref_sig8
:
18998 fprintf_unfiltered (f
, "signature: %s",
18999 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
19001 case DW_FORM_string
:
19003 case DW_FORM_GNU_str_index
:
19004 case DW_FORM_GNU_strp_alt
:
19005 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
19006 DW_STRING (&die
->attrs
[i
])
19007 ? DW_STRING (&die
->attrs
[i
]) : "",
19008 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
19011 if (DW_UNSND (&die
->attrs
[i
]))
19012 fprintf_unfiltered (f
, "flag: TRUE");
19014 fprintf_unfiltered (f
, "flag: FALSE");
19016 case DW_FORM_flag_present
:
19017 fprintf_unfiltered (f
, "flag: TRUE");
19019 case DW_FORM_indirect
:
19020 /* The reader will have reduced the indirect form to
19021 the "base form" so this form should not occur. */
19022 fprintf_unfiltered (f
,
19023 "unexpected attribute form: DW_FORM_indirect");
19026 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
19027 die
->attrs
[i
].form
);
19030 fprintf_unfiltered (f
, "\n");
19035 dump_die_for_error (struct die_info
*die
)
19037 dump_die_shallow (gdb_stderr
, 0, die
);
19041 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
19043 int indent
= level
* 4;
19045 gdb_assert (die
!= NULL
);
19047 if (level
>= max_level
)
19050 dump_die_shallow (f
, indent
, die
);
19052 if (die
->child
!= NULL
)
19054 print_spaces (indent
, f
);
19055 fprintf_unfiltered (f
, " Children:");
19056 if (level
+ 1 < max_level
)
19058 fprintf_unfiltered (f
, "\n");
19059 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
19063 fprintf_unfiltered (f
,
19064 " [not printed, max nesting level reached]\n");
19068 if (die
->sibling
!= NULL
&& level
> 0)
19070 dump_die_1 (f
, level
, max_level
, die
->sibling
);
19074 /* This is called from the pdie macro in gdbinit.in.
19075 It's not static so gcc will keep a copy callable from gdb. */
19078 dump_die (struct die_info
*die
, int max_level
)
19080 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
19084 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
19088 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
.sect_off
,
19094 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
19098 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
19100 sect_offset retval
= { DW_UNSND (attr
) };
19102 if (attr_form_is_ref (attr
))
19105 retval
.sect_off
= 0;
19106 complaint (&symfile_complaints
,
19107 _("unsupported die ref attribute form: '%s'"),
19108 dwarf_form_name (attr
->form
));
19112 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
19113 * the value held by the attribute is not constant. */
19116 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
19118 if (attr
->form
== DW_FORM_sdata
)
19119 return DW_SND (attr
);
19120 else if (attr
->form
== DW_FORM_udata
19121 || attr
->form
== DW_FORM_data1
19122 || attr
->form
== DW_FORM_data2
19123 || attr
->form
== DW_FORM_data4
19124 || attr
->form
== DW_FORM_data8
)
19125 return DW_UNSND (attr
);
19128 complaint (&symfile_complaints
,
19129 _("Attribute value is not a constant (%s)"),
19130 dwarf_form_name (attr
->form
));
19131 return default_value
;
19135 /* Follow reference or signature attribute ATTR of SRC_DIE.
19136 On entry *REF_CU is the CU of SRC_DIE.
19137 On exit *REF_CU is the CU of the result. */
19139 static struct die_info
*
19140 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
19141 struct dwarf2_cu
**ref_cu
)
19143 struct die_info
*die
;
19145 if (attr_form_is_ref (attr
))
19146 die
= follow_die_ref (src_die
, attr
, ref_cu
);
19147 else if (attr
->form
== DW_FORM_ref_sig8
)
19148 die
= follow_die_sig (src_die
, attr
, ref_cu
);
19151 dump_die_for_error (src_die
);
19152 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
19153 objfile_name ((*ref_cu
)->objfile
));
19159 /* Follow reference OFFSET.
19160 On entry *REF_CU is the CU of the source die referencing OFFSET.
19161 On exit *REF_CU is the CU of the result.
19162 Returns NULL if OFFSET is invalid. */
19164 static struct die_info
*
19165 follow_die_offset (sect_offset offset
, int offset_in_dwz
,
19166 struct dwarf2_cu
**ref_cu
)
19168 struct die_info temp_die
;
19169 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
19171 gdb_assert (cu
->per_cu
!= NULL
);
19175 if (cu
->per_cu
->is_debug_types
)
19177 /* .debug_types CUs cannot reference anything outside their CU.
19178 If they need to, they have to reference a signatured type via
19179 DW_FORM_ref_sig8. */
19180 if (! offset_in_cu_p (&cu
->header
, offset
))
19183 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
19184 || ! offset_in_cu_p (&cu
->header
, offset
))
19186 struct dwarf2_per_cu_data
*per_cu
;
19188 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
19191 /* If necessary, add it to the queue and load its DIEs. */
19192 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
19193 load_full_comp_unit (per_cu
, cu
->language
);
19195 target_cu
= per_cu
->cu
;
19197 else if (cu
->dies
== NULL
)
19199 /* We're loading full DIEs during partial symbol reading. */
19200 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
19201 load_full_comp_unit (cu
->per_cu
, language_minimal
);
19204 *ref_cu
= target_cu
;
19205 temp_die
.offset
= offset
;
19206 return htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
.sect_off
);
19209 /* Follow reference attribute ATTR of SRC_DIE.
19210 On entry *REF_CU is the CU of SRC_DIE.
19211 On exit *REF_CU is the CU of the result. */
19213 static struct die_info
*
19214 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
19215 struct dwarf2_cu
**ref_cu
)
19217 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
19218 struct dwarf2_cu
*cu
= *ref_cu
;
19219 struct die_info
*die
;
19221 die
= follow_die_offset (offset
,
19222 (attr
->form
== DW_FORM_GNU_ref_alt
19223 || cu
->per_cu
->is_dwz
),
19226 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
19227 "at 0x%x [in module %s]"),
19228 offset
.sect_off
, src_die
->offset
.sect_off
,
19229 objfile_name (cu
->objfile
));
19234 /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU.
19235 Returned value is intended for DW_OP_call*. Returned
19236 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
19238 struct dwarf2_locexpr_baton
19239 dwarf2_fetch_die_loc_sect_off (sect_offset offset
,
19240 struct dwarf2_per_cu_data
*per_cu
,
19241 CORE_ADDR (*get_frame_pc
) (void *baton
),
19244 struct dwarf2_cu
*cu
;
19245 struct die_info
*die
;
19246 struct attribute
*attr
;
19247 struct dwarf2_locexpr_baton retval
;
19249 dw2_setup (per_cu
->objfile
);
19251 if (per_cu
->cu
== NULL
)
19255 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
19257 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
19258 offset
.sect_off
, objfile_name (per_cu
->objfile
));
19260 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
19263 /* DWARF: "If there is no such attribute, then there is no effect.".
19264 DATA is ignored if SIZE is 0. */
19266 retval
.data
= NULL
;
19269 else if (attr_form_is_section_offset (attr
))
19271 struct dwarf2_loclist_baton loclist_baton
;
19272 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
19275 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
19277 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
19279 retval
.size
= size
;
19283 if (!attr_form_is_block (attr
))
19284 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
19285 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
19286 offset
.sect_off
, objfile_name (per_cu
->objfile
));
19288 retval
.data
= DW_BLOCK (attr
)->data
;
19289 retval
.size
= DW_BLOCK (attr
)->size
;
19291 retval
.per_cu
= cu
->per_cu
;
19293 age_cached_comp_units ();
19298 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
19301 struct dwarf2_locexpr_baton
19302 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
19303 struct dwarf2_per_cu_data
*per_cu
,
19304 CORE_ADDR (*get_frame_pc
) (void *baton
),
19307 sect_offset offset
= { per_cu
->offset
.sect_off
+ offset_in_cu
.cu_off
};
19309 return dwarf2_fetch_die_loc_sect_off (offset
, per_cu
, get_frame_pc
, baton
);
19312 /* Write a constant of a given type as target-ordered bytes into
19315 static const gdb_byte
*
19316 write_constant_as_bytes (struct obstack
*obstack
,
19317 enum bfd_endian byte_order
,
19324 *len
= TYPE_LENGTH (type
);
19325 result
= obstack_alloc (obstack
, *len
);
19326 store_unsigned_integer (result
, *len
, byte_order
, value
);
19331 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
19332 pointer to the constant bytes and set LEN to the length of the
19333 data. If memory is needed, allocate it on OBSTACK. If the DIE
19334 does not have a DW_AT_const_value, return NULL. */
19337 dwarf2_fetch_constant_bytes (sect_offset offset
,
19338 struct dwarf2_per_cu_data
*per_cu
,
19339 struct obstack
*obstack
,
19342 struct dwarf2_cu
*cu
;
19343 struct die_info
*die
;
19344 struct attribute
*attr
;
19345 const gdb_byte
*result
= NULL
;
19348 enum bfd_endian byte_order
;
19350 dw2_setup (per_cu
->objfile
);
19352 if (per_cu
->cu
== NULL
)
19356 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
19358 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
19359 offset
.sect_off
, objfile_name (per_cu
->objfile
));
19362 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
19366 byte_order
= (bfd_big_endian (per_cu
->objfile
->obfd
)
19367 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
19369 switch (attr
->form
)
19372 case DW_FORM_GNU_addr_index
:
19376 *len
= cu
->header
.addr_size
;
19377 tem
= obstack_alloc (obstack
, *len
);
19378 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
19382 case DW_FORM_string
:
19384 case DW_FORM_GNU_str_index
:
19385 case DW_FORM_GNU_strp_alt
:
19386 /* DW_STRING is already allocated on the objfile obstack, point
19388 result
= (const gdb_byte
*) DW_STRING (attr
);
19389 *len
= strlen (DW_STRING (attr
));
19391 case DW_FORM_block1
:
19392 case DW_FORM_block2
:
19393 case DW_FORM_block4
:
19394 case DW_FORM_block
:
19395 case DW_FORM_exprloc
:
19396 result
= DW_BLOCK (attr
)->data
;
19397 *len
= DW_BLOCK (attr
)->size
;
19400 /* The DW_AT_const_value attributes are supposed to carry the
19401 symbol's value "represented as it would be on the target
19402 architecture." By the time we get here, it's already been
19403 converted to host endianness, so we just need to sign- or
19404 zero-extend it as appropriate. */
19405 case DW_FORM_data1
:
19406 type
= die_type (die
, cu
);
19407 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
19408 if (result
== NULL
)
19409 result
= write_constant_as_bytes (obstack
, byte_order
,
19412 case DW_FORM_data2
:
19413 type
= die_type (die
, cu
);
19414 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
19415 if (result
== NULL
)
19416 result
= write_constant_as_bytes (obstack
, byte_order
,
19419 case DW_FORM_data4
:
19420 type
= die_type (die
, cu
);
19421 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
19422 if (result
== NULL
)
19423 result
= write_constant_as_bytes (obstack
, byte_order
,
19426 case DW_FORM_data8
:
19427 type
= die_type (die
, cu
);
19428 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
19429 if (result
== NULL
)
19430 result
= write_constant_as_bytes (obstack
, byte_order
,
19434 case DW_FORM_sdata
:
19435 type
= die_type (die
, cu
);
19436 result
= write_constant_as_bytes (obstack
, byte_order
,
19437 type
, DW_SND (attr
), len
);
19440 case DW_FORM_udata
:
19441 type
= die_type (die
, cu
);
19442 result
= write_constant_as_bytes (obstack
, byte_order
,
19443 type
, DW_UNSND (attr
), len
);
19447 complaint (&symfile_complaints
,
19448 _("unsupported const value attribute form: '%s'"),
19449 dwarf_form_name (attr
->form
));
19456 /* Return the type of the DIE at DIE_OFFSET in the CU named by
19460 dwarf2_get_die_type (cu_offset die_offset
,
19461 struct dwarf2_per_cu_data
*per_cu
)
19463 sect_offset die_offset_sect
;
19465 dw2_setup (per_cu
->objfile
);
19467 die_offset_sect
.sect_off
= per_cu
->offset
.sect_off
+ die_offset
.cu_off
;
19468 return get_die_type_at_offset (die_offset_sect
, per_cu
);
19471 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
19472 On entry *REF_CU is the CU of SRC_DIE.
19473 On exit *REF_CU is the CU of the result.
19474 Returns NULL if the referenced DIE isn't found. */
19476 static struct die_info
*
19477 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
19478 struct dwarf2_cu
**ref_cu
)
19480 struct objfile
*objfile
= (*ref_cu
)->objfile
;
19481 struct die_info temp_die
;
19482 struct dwarf2_cu
*sig_cu
;
19483 struct die_info
*die
;
19485 /* While it might be nice to assert sig_type->type == NULL here,
19486 we can get here for DW_AT_imported_declaration where we need
19487 the DIE not the type. */
19489 /* If necessary, add it to the queue and load its DIEs. */
19491 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
19492 read_signatured_type (sig_type
);
19494 sig_cu
= sig_type
->per_cu
.cu
;
19495 gdb_assert (sig_cu
!= NULL
);
19496 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
19497 temp_die
.offset
= sig_type
->type_offset_in_section
;
19498 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
19499 temp_die
.offset
.sect_off
);
19502 /* For .gdb_index version 7 keep track of included TUs.
19503 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
19504 if (dwarf2_per_objfile
->index_table
!= NULL
19505 && dwarf2_per_objfile
->index_table
->version
<= 7)
19507 VEC_safe_push (dwarf2_per_cu_ptr
,
19508 (*ref_cu
)->per_cu
->imported_symtabs
,
19519 /* Follow signatured type referenced by ATTR in SRC_DIE.
19520 On entry *REF_CU is the CU of SRC_DIE.
19521 On exit *REF_CU is the CU of the result.
19522 The result is the DIE of the type.
19523 If the referenced type cannot be found an error is thrown. */
19525 static struct die_info
*
19526 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
19527 struct dwarf2_cu
**ref_cu
)
19529 ULONGEST signature
= DW_SIGNATURE (attr
);
19530 struct signatured_type
*sig_type
;
19531 struct die_info
*die
;
19533 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
19535 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
19536 /* sig_type will be NULL if the signatured type is missing from
19538 if (sig_type
== NULL
)
19540 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
19541 " from DIE at 0x%x [in module %s]"),
19542 hex_string (signature
), src_die
->offset
.sect_off
,
19543 objfile_name ((*ref_cu
)->objfile
));
19546 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
19549 dump_die_for_error (src_die
);
19550 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
19551 " from DIE at 0x%x [in module %s]"),
19552 hex_string (signature
), src_die
->offset
.sect_off
,
19553 objfile_name ((*ref_cu
)->objfile
));
19559 /* Get the type specified by SIGNATURE referenced in DIE/CU,
19560 reading in and processing the type unit if necessary. */
19562 static struct type
*
19563 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
19564 struct dwarf2_cu
*cu
)
19566 struct signatured_type
*sig_type
;
19567 struct dwarf2_cu
*type_cu
;
19568 struct die_info
*type_die
;
19571 sig_type
= lookup_signatured_type (cu
, signature
);
19572 /* sig_type will be NULL if the signatured type is missing from
19574 if (sig_type
== NULL
)
19576 complaint (&symfile_complaints
,
19577 _("Dwarf Error: Cannot find signatured DIE %s referenced"
19578 " from DIE at 0x%x [in module %s]"),
19579 hex_string (signature
), die
->offset
.sect_off
,
19580 objfile_name (dwarf2_per_objfile
->objfile
));
19581 return build_error_marker_type (cu
, die
);
19584 /* If we already know the type we're done. */
19585 if (sig_type
->type
!= NULL
)
19586 return sig_type
->type
;
19589 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
19590 if (type_die
!= NULL
)
19592 /* N.B. We need to call get_die_type to ensure only one type for this DIE
19593 is created. This is important, for example, because for c++ classes
19594 we need TYPE_NAME set which is only done by new_symbol. Blech. */
19595 type
= read_type_die (type_die
, type_cu
);
19598 complaint (&symfile_complaints
,
19599 _("Dwarf Error: Cannot build signatured type %s"
19600 " referenced from DIE at 0x%x [in module %s]"),
19601 hex_string (signature
), die
->offset
.sect_off
,
19602 objfile_name (dwarf2_per_objfile
->objfile
));
19603 type
= build_error_marker_type (cu
, die
);
19608 complaint (&symfile_complaints
,
19609 _("Dwarf Error: Problem reading signatured DIE %s referenced"
19610 " from DIE at 0x%x [in module %s]"),
19611 hex_string (signature
), die
->offset
.sect_off
,
19612 objfile_name (dwarf2_per_objfile
->objfile
));
19613 type
= build_error_marker_type (cu
, die
);
19615 sig_type
->type
= type
;
19620 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
19621 reading in and processing the type unit if necessary. */
19623 static struct type
*
19624 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
19625 struct dwarf2_cu
*cu
) /* ARI: editCase function */
19627 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
19628 if (attr_form_is_ref (attr
))
19630 struct dwarf2_cu
*type_cu
= cu
;
19631 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
19633 return read_type_die (type_die
, type_cu
);
19635 else if (attr
->form
== DW_FORM_ref_sig8
)
19637 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
19641 complaint (&symfile_complaints
,
19642 _("Dwarf Error: DW_AT_signature has bad form %s in DIE"
19643 " at 0x%x [in module %s]"),
19644 dwarf_form_name (attr
->form
), die
->offset
.sect_off
,
19645 objfile_name (dwarf2_per_objfile
->objfile
));
19646 return build_error_marker_type (cu
, die
);
19650 /* Load the DIEs associated with type unit PER_CU into memory. */
19653 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
19655 struct signatured_type
*sig_type
;
19657 /* Caller is responsible for ensuring type_unit_groups don't get here. */
19658 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
19660 /* We have the per_cu, but we need the signatured_type.
19661 Fortunately this is an easy translation. */
19662 gdb_assert (per_cu
->is_debug_types
);
19663 sig_type
= (struct signatured_type
*) per_cu
;
19665 gdb_assert (per_cu
->cu
== NULL
);
19667 read_signatured_type (sig_type
);
19669 gdb_assert (per_cu
->cu
!= NULL
);
19672 /* die_reader_func for read_signatured_type.
19673 This is identical to load_full_comp_unit_reader,
19674 but is kept separate for now. */
19677 read_signatured_type_reader (const struct die_reader_specs
*reader
,
19678 const gdb_byte
*info_ptr
,
19679 struct die_info
*comp_unit_die
,
19683 struct dwarf2_cu
*cu
= reader
->cu
;
19685 gdb_assert (cu
->die_hash
== NULL
);
19687 htab_create_alloc_ex (cu
->header
.length
/ 12,
19691 &cu
->comp_unit_obstack
,
19692 hashtab_obstack_allocate
,
19693 dummy_obstack_deallocate
);
19696 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
19697 &info_ptr
, comp_unit_die
);
19698 cu
->dies
= comp_unit_die
;
19699 /* comp_unit_die is not stored in die_hash, no need. */
19701 /* We try not to read any attributes in this function, because not
19702 all CUs needed for references have been loaded yet, and symbol
19703 table processing isn't initialized. But we have to set the CU language,
19704 or we won't be able to build types correctly.
19705 Similarly, if we do not read the producer, we can not apply
19706 producer-specific interpretation. */
19707 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
19710 /* Read in a signatured type and build its CU and DIEs.
19711 If the type is a stub for the real type in a DWO file,
19712 read in the real type from the DWO file as well. */
19715 read_signatured_type (struct signatured_type
*sig_type
)
19717 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
19719 gdb_assert (per_cu
->is_debug_types
);
19720 gdb_assert (per_cu
->cu
== NULL
);
19722 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
19723 read_signatured_type_reader
, NULL
);
19724 sig_type
->per_cu
.tu_read
= 1;
19727 /* Decode simple location descriptions.
19728 Given a pointer to a dwarf block that defines a location, compute
19729 the location and return the value.
19731 NOTE drow/2003-11-18: This function is called in two situations
19732 now: for the address of static or global variables (partial symbols
19733 only) and for offsets into structures which are expected to be
19734 (more or less) constant. The partial symbol case should go away,
19735 and only the constant case should remain. That will let this
19736 function complain more accurately. A few special modes are allowed
19737 without complaint for global variables (for instance, global
19738 register values and thread-local values).
19740 A location description containing no operations indicates that the
19741 object is optimized out. The return value is 0 for that case.
19742 FIXME drow/2003-11-16: No callers check for this case any more; soon all
19743 callers will only want a very basic result and this can become a
19746 Note that stack[0] is unused except as a default error return. */
19749 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
19751 struct objfile
*objfile
= cu
->objfile
;
19753 size_t size
= blk
->size
;
19754 const gdb_byte
*data
= blk
->data
;
19755 CORE_ADDR stack
[64];
19757 unsigned int bytes_read
, unsnd
;
19763 stack
[++stacki
] = 0;
19802 stack
[++stacki
] = op
- DW_OP_lit0
;
19837 stack
[++stacki
] = op
- DW_OP_reg0
;
19839 dwarf2_complex_location_expr_complaint ();
19843 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
19845 stack
[++stacki
] = unsnd
;
19847 dwarf2_complex_location_expr_complaint ();
19851 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
19856 case DW_OP_const1u
:
19857 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
19861 case DW_OP_const1s
:
19862 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
19866 case DW_OP_const2u
:
19867 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
19871 case DW_OP_const2s
:
19872 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
19876 case DW_OP_const4u
:
19877 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
19881 case DW_OP_const4s
:
19882 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
19886 case DW_OP_const8u
:
19887 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
19892 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
19898 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
19903 stack
[stacki
+ 1] = stack
[stacki
];
19908 stack
[stacki
- 1] += stack
[stacki
];
19912 case DW_OP_plus_uconst
:
19913 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
19919 stack
[stacki
- 1] -= stack
[stacki
];
19924 /* If we're not the last op, then we definitely can't encode
19925 this using GDB's address_class enum. This is valid for partial
19926 global symbols, although the variable's address will be bogus
19929 dwarf2_complex_location_expr_complaint ();
19932 case DW_OP_GNU_push_tls_address
:
19933 /* The top of the stack has the offset from the beginning
19934 of the thread control block at which the variable is located. */
19935 /* Nothing should follow this operator, so the top of stack would
19937 /* This is valid for partial global symbols, but the variable's
19938 address will be bogus in the psymtab. Make it always at least
19939 non-zero to not look as a variable garbage collected by linker
19940 which have DW_OP_addr 0. */
19942 dwarf2_complex_location_expr_complaint ();
19946 case DW_OP_GNU_uninit
:
19949 case DW_OP_GNU_addr_index
:
19950 case DW_OP_GNU_const_index
:
19951 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
19958 const char *name
= get_DW_OP_name (op
);
19961 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
19964 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
19968 return (stack
[stacki
]);
19971 /* Enforce maximum stack depth of SIZE-1 to avoid writing
19972 outside of the allocated space. Also enforce minimum>0. */
19973 if (stacki
>= ARRAY_SIZE (stack
) - 1)
19975 complaint (&symfile_complaints
,
19976 _("location description stack overflow"));
19982 complaint (&symfile_complaints
,
19983 _("location description stack underflow"));
19987 return (stack
[stacki
]);
19990 /* memory allocation interface */
19992 static struct dwarf_block
*
19993 dwarf_alloc_block (struct dwarf2_cu
*cu
)
19995 struct dwarf_block
*blk
;
19997 blk
= (struct dwarf_block
*)
19998 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
20002 static struct die_info
*
20003 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
20005 struct die_info
*die
;
20006 size_t size
= sizeof (struct die_info
);
20009 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
20011 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
20012 memset (die
, 0, sizeof (struct die_info
));
20017 /* Macro support. */
20019 /* Return file name relative to the compilation directory of file number I in
20020 *LH's file name table. The result is allocated using xmalloc; the caller is
20021 responsible for freeing it. */
20024 file_file_name (int file
, struct line_header
*lh
)
20026 /* Is the file number a valid index into the line header's file name
20027 table? Remember that file numbers start with one, not zero. */
20028 if (1 <= file
&& file
<= lh
->num_file_names
)
20030 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
20032 if (IS_ABSOLUTE_PATH (fe
->name
) || fe
->dir_index
== 0)
20033 return xstrdup (fe
->name
);
20034 return concat (lh
->include_dirs
[fe
->dir_index
- 1], SLASH_STRING
,
20039 /* The compiler produced a bogus file number. We can at least
20040 record the macro definitions made in the file, even if we
20041 won't be able to find the file by name. */
20042 char fake_name
[80];
20044 xsnprintf (fake_name
, sizeof (fake_name
),
20045 "<bad macro file number %d>", file
);
20047 complaint (&symfile_complaints
,
20048 _("bad file number in macro information (%d)"),
20051 return xstrdup (fake_name
);
20055 /* Return the full name of file number I in *LH's file name table.
20056 Use COMP_DIR as the name of the current directory of the
20057 compilation. The result is allocated using xmalloc; the caller is
20058 responsible for freeing it. */
20060 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
20062 /* Is the file number a valid index into the line header's file name
20063 table? Remember that file numbers start with one, not zero. */
20064 if (1 <= file
&& file
<= lh
->num_file_names
)
20066 char *relative
= file_file_name (file
, lh
);
20068 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
20070 return reconcat (relative
, comp_dir
, SLASH_STRING
, relative
, NULL
);
20073 return file_file_name (file
, lh
);
20077 static struct macro_source_file
*
20078 macro_start_file (int file
, int line
,
20079 struct macro_source_file
*current_file
,
20080 const char *comp_dir
,
20081 struct line_header
*lh
, struct objfile
*objfile
)
20083 /* File name relative to the compilation directory of this source file. */
20084 char *file_name
= file_file_name (file
, lh
);
20086 if (! current_file
)
20088 /* Note: We don't create a macro table for this compilation unit
20089 at all until we actually get a filename. */
20090 struct macro_table
*macro_table
= get_macro_table (objfile
, comp_dir
);
20092 /* If we have no current file, then this must be the start_file
20093 directive for the compilation unit's main source file. */
20094 current_file
= macro_set_main (macro_table
, file_name
);
20095 macro_define_special (macro_table
);
20098 current_file
= macro_include (current_file
, line
, file_name
);
20102 return current_file
;
20106 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
20107 followed by a null byte. */
20109 copy_string (const char *buf
, int len
)
20111 char *s
= xmalloc (len
+ 1);
20113 memcpy (s
, buf
, len
);
20119 static const char *
20120 consume_improper_spaces (const char *p
, const char *body
)
20124 complaint (&symfile_complaints
,
20125 _("macro definition contains spaces "
20126 "in formal argument list:\n`%s'"),
20138 parse_macro_definition (struct macro_source_file
*file
, int line
,
20143 /* The body string takes one of two forms. For object-like macro
20144 definitions, it should be:
20146 <macro name> " " <definition>
20148 For function-like macro definitions, it should be:
20150 <macro name> "() " <definition>
20152 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
20154 Spaces may appear only where explicitly indicated, and in the
20157 The Dwarf 2 spec says that an object-like macro's name is always
20158 followed by a space, but versions of GCC around March 2002 omit
20159 the space when the macro's definition is the empty string.
20161 The Dwarf 2 spec says that there should be no spaces between the
20162 formal arguments in a function-like macro's formal argument list,
20163 but versions of GCC around March 2002 include spaces after the
20167 /* Find the extent of the macro name. The macro name is terminated
20168 by either a space or null character (for an object-like macro) or
20169 an opening paren (for a function-like macro). */
20170 for (p
= body
; *p
; p
++)
20171 if (*p
== ' ' || *p
== '(')
20174 if (*p
== ' ' || *p
== '\0')
20176 /* It's an object-like macro. */
20177 int name_len
= p
- body
;
20178 char *name
= copy_string (body
, name_len
);
20179 const char *replacement
;
20182 replacement
= body
+ name_len
+ 1;
20185 dwarf2_macro_malformed_definition_complaint (body
);
20186 replacement
= body
+ name_len
;
20189 macro_define_object (file
, line
, name
, replacement
);
20193 else if (*p
== '(')
20195 /* It's a function-like macro. */
20196 char *name
= copy_string (body
, p
- body
);
20199 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
20203 p
= consume_improper_spaces (p
, body
);
20205 /* Parse the formal argument list. */
20206 while (*p
&& *p
!= ')')
20208 /* Find the extent of the current argument name. */
20209 const char *arg_start
= p
;
20211 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
20214 if (! *p
|| p
== arg_start
)
20215 dwarf2_macro_malformed_definition_complaint (body
);
20218 /* Make sure argv has room for the new argument. */
20219 if (argc
>= argv_size
)
20222 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
20225 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
20228 p
= consume_improper_spaces (p
, body
);
20230 /* Consume the comma, if present. */
20235 p
= consume_improper_spaces (p
, body
);
20244 /* Perfectly formed definition, no complaints. */
20245 macro_define_function (file
, line
, name
,
20246 argc
, (const char **) argv
,
20248 else if (*p
== '\0')
20250 /* Complain, but do define it. */
20251 dwarf2_macro_malformed_definition_complaint (body
);
20252 macro_define_function (file
, line
, name
,
20253 argc
, (const char **) argv
,
20257 /* Just complain. */
20258 dwarf2_macro_malformed_definition_complaint (body
);
20261 /* Just complain. */
20262 dwarf2_macro_malformed_definition_complaint (body
);
20268 for (i
= 0; i
< argc
; i
++)
20274 dwarf2_macro_malformed_definition_complaint (body
);
20277 /* Skip some bytes from BYTES according to the form given in FORM.
20278 Returns the new pointer. */
20280 static const gdb_byte
*
20281 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
20282 enum dwarf_form form
,
20283 unsigned int offset_size
,
20284 struct dwarf2_section_info
*section
)
20286 unsigned int bytes_read
;
20290 case DW_FORM_data1
:
20295 case DW_FORM_data2
:
20299 case DW_FORM_data4
:
20303 case DW_FORM_data8
:
20307 case DW_FORM_string
:
20308 read_direct_string (abfd
, bytes
, &bytes_read
);
20309 bytes
+= bytes_read
;
20312 case DW_FORM_sec_offset
:
20314 case DW_FORM_GNU_strp_alt
:
20315 bytes
+= offset_size
;
20318 case DW_FORM_block
:
20319 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
20320 bytes
+= bytes_read
;
20323 case DW_FORM_block1
:
20324 bytes
+= 1 + read_1_byte (abfd
, bytes
);
20326 case DW_FORM_block2
:
20327 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
20329 case DW_FORM_block4
:
20330 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
20333 case DW_FORM_sdata
:
20334 case DW_FORM_udata
:
20335 case DW_FORM_GNU_addr_index
:
20336 case DW_FORM_GNU_str_index
:
20337 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
20340 dwarf2_section_buffer_overflow_complaint (section
);
20348 complaint (&symfile_complaints
,
20349 _("invalid form 0x%x in `%s'"),
20350 form
, get_section_name (section
));
20358 /* A helper for dwarf_decode_macros that handles skipping an unknown
20359 opcode. Returns an updated pointer to the macro data buffer; or,
20360 on error, issues a complaint and returns NULL. */
20362 static const gdb_byte
*
20363 skip_unknown_opcode (unsigned int opcode
,
20364 const gdb_byte
**opcode_definitions
,
20365 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
20367 unsigned int offset_size
,
20368 struct dwarf2_section_info
*section
)
20370 unsigned int bytes_read
, i
;
20372 const gdb_byte
*defn
;
20374 if (opcode_definitions
[opcode
] == NULL
)
20376 complaint (&symfile_complaints
,
20377 _("unrecognized DW_MACFINO opcode 0x%x"),
20382 defn
= opcode_definitions
[opcode
];
20383 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
20384 defn
+= bytes_read
;
20386 for (i
= 0; i
< arg
; ++i
)
20388 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
, defn
[i
], offset_size
,
20390 if (mac_ptr
== NULL
)
20392 /* skip_form_bytes already issued the complaint. */
20400 /* A helper function which parses the header of a macro section.
20401 If the macro section is the extended (for now called "GNU") type,
20402 then this updates *OFFSET_SIZE. Returns a pointer to just after
20403 the header, or issues a complaint and returns NULL on error. */
20405 static const gdb_byte
*
20406 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
20408 const gdb_byte
*mac_ptr
,
20409 unsigned int *offset_size
,
20410 int section_is_gnu
)
20412 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
20414 if (section_is_gnu
)
20416 unsigned int version
, flags
;
20418 version
= read_2_bytes (abfd
, mac_ptr
);
20421 complaint (&symfile_complaints
,
20422 _("unrecognized version `%d' in .debug_macro section"),
20428 flags
= read_1_byte (abfd
, mac_ptr
);
20430 *offset_size
= (flags
& 1) ? 8 : 4;
20432 if ((flags
& 2) != 0)
20433 /* We don't need the line table offset. */
20434 mac_ptr
+= *offset_size
;
20436 /* Vendor opcode descriptions. */
20437 if ((flags
& 4) != 0)
20439 unsigned int i
, count
;
20441 count
= read_1_byte (abfd
, mac_ptr
);
20443 for (i
= 0; i
< count
; ++i
)
20445 unsigned int opcode
, bytes_read
;
20448 opcode
= read_1_byte (abfd
, mac_ptr
);
20450 opcode_definitions
[opcode
] = mac_ptr
;
20451 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
20452 mac_ptr
+= bytes_read
;
20461 /* A helper for dwarf_decode_macros that handles the GNU extensions,
20462 including DW_MACRO_GNU_transparent_include. */
20465 dwarf_decode_macro_bytes (bfd
*abfd
,
20466 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
20467 struct macro_source_file
*current_file
,
20468 struct line_header
*lh
, const char *comp_dir
,
20469 struct dwarf2_section_info
*section
,
20470 int section_is_gnu
, int section_is_dwz
,
20471 unsigned int offset_size
,
20472 struct objfile
*objfile
,
20473 htab_t include_hash
)
20475 enum dwarf_macro_record_type macinfo_type
;
20476 int at_commandline
;
20477 const gdb_byte
*opcode_definitions
[256];
20479 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
20480 &offset_size
, section_is_gnu
);
20481 if (mac_ptr
== NULL
)
20483 /* We already issued a complaint. */
20487 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
20488 GDB is still reading the definitions from command line. First
20489 DW_MACINFO_start_file will need to be ignored as it was already executed
20490 to create CURRENT_FILE for the main source holding also the command line
20491 definitions. On first met DW_MACINFO_start_file this flag is reset to
20492 normally execute all the remaining DW_MACINFO_start_file macinfos. */
20494 at_commandline
= 1;
20498 /* Do we at least have room for a macinfo type byte? */
20499 if (mac_ptr
>= mac_end
)
20501 dwarf2_section_buffer_overflow_complaint (section
);
20505 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
20508 /* Note that we rely on the fact that the corresponding GNU and
20509 DWARF constants are the same. */
20510 switch (macinfo_type
)
20512 /* A zero macinfo type indicates the end of the macro
20517 case DW_MACRO_GNU_define
:
20518 case DW_MACRO_GNU_undef
:
20519 case DW_MACRO_GNU_define_indirect
:
20520 case DW_MACRO_GNU_undef_indirect
:
20521 case DW_MACRO_GNU_define_indirect_alt
:
20522 case DW_MACRO_GNU_undef_indirect_alt
:
20524 unsigned int bytes_read
;
20529 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
20530 mac_ptr
+= bytes_read
;
20532 if (macinfo_type
== DW_MACRO_GNU_define
20533 || macinfo_type
== DW_MACRO_GNU_undef
)
20535 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
20536 mac_ptr
+= bytes_read
;
20540 LONGEST str_offset
;
20542 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
20543 mac_ptr
+= offset_size
;
20545 if (macinfo_type
== DW_MACRO_GNU_define_indirect_alt
20546 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
20549 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
20551 body
= read_indirect_string_from_dwz (dwz
, str_offset
);
20554 body
= read_indirect_string_at_offset (abfd
, str_offset
);
20557 is_define
= (macinfo_type
== DW_MACRO_GNU_define
20558 || macinfo_type
== DW_MACRO_GNU_define_indirect
20559 || macinfo_type
== DW_MACRO_GNU_define_indirect_alt
);
20560 if (! current_file
)
20562 /* DWARF violation as no main source is present. */
20563 complaint (&symfile_complaints
,
20564 _("debug info with no main source gives macro %s "
20566 is_define
? _("definition") : _("undefinition"),
20570 if ((line
== 0 && !at_commandline
)
20571 || (line
!= 0 && at_commandline
))
20572 complaint (&symfile_complaints
,
20573 _("debug info gives %s macro %s with %s line %d: %s"),
20574 at_commandline
? _("command-line") : _("in-file"),
20575 is_define
? _("definition") : _("undefinition"),
20576 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
20579 parse_macro_definition (current_file
, line
, body
);
20582 gdb_assert (macinfo_type
== DW_MACRO_GNU_undef
20583 || macinfo_type
== DW_MACRO_GNU_undef_indirect
20584 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
);
20585 macro_undef (current_file
, line
, body
);
20590 case DW_MACRO_GNU_start_file
:
20592 unsigned int bytes_read
;
20595 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
20596 mac_ptr
+= bytes_read
;
20597 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
20598 mac_ptr
+= bytes_read
;
20600 if ((line
== 0 && !at_commandline
)
20601 || (line
!= 0 && at_commandline
))
20602 complaint (&symfile_complaints
,
20603 _("debug info gives source %d included "
20604 "from %s at %s line %d"),
20605 file
, at_commandline
? _("command-line") : _("file"),
20606 line
== 0 ? _("zero") : _("non-zero"), line
);
20608 if (at_commandline
)
20610 /* This DW_MACRO_GNU_start_file was executed in the
20612 at_commandline
= 0;
20615 current_file
= macro_start_file (file
, line
,
20616 current_file
, comp_dir
,
20621 case DW_MACRO_GNU_end_file
:
20622 if (! current_file
)
20623 complaint (&symfile_complaints
,
20624 _("macro debug info has an unmatched "
20625 "`close_file' directive"));
20628 current_file
= current_file
->included_by
;
20629 if (! current_file
)
20631 enum dwarf_macro_record_type next_type
;
20633 /* GCC circa March 2002 doesn't produce the zero
20634 type byte marking the end of the compilation
20635 unit. Complain if it's not there, but exit no
20638 /* Do we at least have room for a macinfo type byte? */
20639 if (mac_ptr
>= mac_end
)
20641 dwarf2_section_buffer_overflow_complaint (section
);
20645 /* We don't increment mac_ptr here, so this is just
20647 next_type
= read_1_byte (abfd
, mac_ptr
);
20648 if (next_type
!= 0)
20649 complaint (&symfile_complaints
,
20650 _("no terminating 0-type entry for "
20651 "macros in `.debug_macinfo' section"));
20658 case DW_MACRO_GNU_transparent_include
:
20659 case DW_MACRO_GNU_transparent_include_alt
:
20663 bfd
*include_bfd
= abfd
;
20664 struct dwarf2_section_info
*include_section
= section
;
20665 struct dwarf2_section_info alt_section
;
20666 const gdb_byte
*include_mac_end
= mac_end
;
20667 int is_dwz
= section_is_dwz
;
20668 const gdb_byte
*new_mac_ptr
;
20670 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
20671 mac_ptr
+= offset_size
;
20673 if (macinfo_type
== DW_MACRO_GNU_transparent_include_alt
)
20675 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
20677 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
20680 include_section
= &dwz
->macro
;
20681 include_bfd
= get_section_bfd_owner (include_section
);
20682 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
20686 new_mac_ptr
= include_section
->buffer
+ offset
;
20687 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
20691 /* This has actually happened; see
20692 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
20693 complaint (&symfile_complaints
,
20694 _("recursive DW_MACRO_GNU_transparent_include in "
20695 ".debug_macro section"));
20699 *slot
= (void *) new_mac_ptr
;
20701 dwarf_decode_macro_bytes (include_bfd
, new_mac_ptr
,
20702 include_mac_end
, current_file
,
20704 section
, section_is_gnu
, is_dwz
,
20705 offset_size
, objfile
, include_hash
);
20707 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
20712 case DW_MACINFO_vendor_ext
:
20713 if (!section_is_gnu
)
20715 unsigned int bytes_read
;
20718 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
20719 mac_ptr
+= bytes_read
;
20720 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
20721 mac_ptr
+= bytes_read
;
20723 /* We don't recognize any vendor extensions. */
20729 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
20730 mac_ptr
, mac_end
, abfd
, offset_size
,
20732 if (mac_ptr
== NULL
)
20736 } while (macinfo_type
!= 0);
20740 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
20741 const char *comp_dir
, int section_is_gnu
)
20743 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
20744 struct line_header
*lh
= cu
->line_header
;
20746 const gdb_byte
*mac_ptr
, *mac_end
;
20747 struct macro_source_file
*current_file
= 0;
20748 enum dwarf_macro_record_type macinfo_type
;
20749 unsigned int offset_size
= cu
->header
.offset_size
;
20750 const gdb_byte
*opcode_definitions
[256];
20751 struct cleanup
*cleanup
;
20752 htab_t include_hash
;
20754 struct dwarf2_section_info
*section
;
20755 const char *section_name
;
20757 if (cu
->dwo_unit
!= NULL
)
20759 if (section_is_gnu
)
20761 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
20762 section_name
= ".debug_macro.dwo";
20766 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
20767 section_name
= ".debug_macinfo.dwo";
20772 if (section_is_gnu
)
20774 section
= &dwarf2_per_objfile
->macro
;
20775 section_name
= ".debug_macro";
20779 section
= &dwarf2_per_objfile
->macinfo
;
20780 section_name
= ".debug_macinfo";
20784 dwarf2_read_section (objfile
, section
);
20785 if (section
->buffer
== NULL
)
20787 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
20790 abfd
= get_section_bfd_owner (section
);
20792 /* First pass: Find the name of the base filename.
20793 This filename is needed in order to process all macros whose definition
20794 (or undefinition) comes from the command line. These macros are defined
20795 before the first DW_MACINFO_start_file entry, and yet still need to be
20796 associated to the base file.
20798 To determine the base file name, we scan the macro definitions until we
20799 reach the first DW_MACINFO_start_file entry. We then initialize
20800 CURRENT_FILE accordingly so that any macro definition found before the
20801 first DW_MACINFO_start_file can still be associated to the base file. */
20803 mac_ptr
= section
->buffer
+ offset
;
20804 mac_end
= section
->buffer
+ section
->size
;
20806 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
20807 &offset_size
, section_is_gnu
);
20808 if (mac_ptr
== NULL
)
20810 /* We already issued a complaint. */
20816 /* Do we at least have room for a macinfo type byte? */
20817 if (mac_ptr
>= mac_end
)
20819 /* Complaint is printed during the second pass as GDB will probably
20820 stop the first pass earlier upon finding
20821 DW_MACINFO_start_file. */
20825 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
20828 /* Note that we rely on the fact that the corresponding GNU and
20829 DWARF constants are the same. */
20830 switch (macinfo_type
)
20832 /* A zero macinfo type indicates the end of the macro
20837 case DW_MACRO_GNU_define
:
20838 case DW_MACRO_GNU_undef
:
20839 /* Only skip the data by MAC_PTR. */
20841 unsigned int bytes_read
;
20843 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
20844 mac_ptr
+= bytes_read
;
20845 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
20846 mac_ptr
+= bytes_read
;
20850 case DW_MACRO_GNU_start_file
:
20852 unsigned int bytes_read
;
20855 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
20856 mac_ptr
+= bytes_read
;
20857 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
20858 mac_ptr
+= bytes_read
;
20860 current_file
= macro_start_file (file
, line
, current_file
,
20861 comp_dir
, lh
, objfile
);
20865 case DW_MACRO_GNU_end_file
:
20866 /* No data to skip by MAC_PTR. */
20869 case DW_MACRO_GNU_define_indirect
:
20870 case DW_MACRO_GNU_undef_indirect
:
20871 case DW_MACRO_GNU_define_indirect_alt
:
20872 case DW_MACRO_GNU_undef_indirect_alt
:
20874 unsigned int bytes_read
;
20876 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
20877 mac_ptr
+= bytes_read
;
20878 mac_ptr
+= offset_size
;
20882 case DW_MACRO_GNU_transparent_include
:
20883 case DW_MACRO_GNU_transparent_include_alt
:
20884 /* Note that, according to the spec, a transparent include
20885 chain cannot call DW_MACRO_GNU_start_file. So, we can just
20886 skip this opcode. */
20887 mac_ptr
+= offset_size
;
20890 case DW_MACINFO_vendor_ext
:
20891 /* Only skip the data by MAC_PTR. */
20892 if (!section_is_gnu
)
20894 unsigned int bytes_read
;
20896 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
20897 mac_ptr
+= bytes_read
;
20898 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
20899 mac_ptr
+= bytes_read
;
20904 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
20905 mac_ptr
, mac_end
, abfd
, offset_size
,
20907 if (mac_ptr
== NULL
)
20911 } while (macinfo_type
!= 0 && current_file
== NULL
);
20913 /* Second pass: Process all entries.
20915 Use the AT_COMMAND_LINE flag to determine whether we are still processing
20916 command-line macro definitions/undefinitions. This flag is unset when we
20917 reach the first DW_MACINFO_start_file entry. */
20919 include_hash
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
20920 NULL
, xcalloc
, xfree
);
20921 cleanup
= make_cleanup_htab_delete (include_hash
);
20922 mac_ptr
= section
->buffer
+ offset
;
20923 slot
= htab_find_slot (include_hash
, mac_ptr
, INSERT
);
20924 *slot
= (void *) mac_ptr
;
20925 dwarf_decode_macro_bytes (abfd
, mac_ptr
, mac_end
,
20926 current_file
, lh
, comp_dir
, section
,
20928 offset_size
, objfile
, include_hash
);
20929 do_cleanups (cleanup
);
20932 /* Check if the attribute's form is a DW_FORM_block*
20933 if so return true else false. */
20936 attr_form_is_block (const struct attribute
*attr
)
20938 return (attr
== NULL
? 0 :
20939 attr
->form
== DW_FORM_block1
20940 || attr
->form
== DW_FORM_block2
20941 || attr
->form
== DW_FORM_block4
20942 || attr
->form
== DW_FORM_block
20943 || attr
->form
== DW_FORM_exprloc
);
20946 /* Return non-zero if ATTR's value is a section offset --- classes
20947 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
20948 You may use DW_UNSND (attr) to retrieve such offsets.
20950 Section 7.5.4, "Attribute Encodings", explains that no attribute
20951 may have a value that belongs to more than one of these classes; it
20952 would be ambiguous if we did, because we use the same forms for all
20956 attr_form_is_section_offset (const struct attribute
*attr
)
20958 return (attr
->form
== DW_FORM_data4
20959 || attr
->form
== DW_FORM_data8
20960 || attr
->form
== DW_FORM_sec_offset
);
20963 /* Return non-zero if ATTR's value falls in the 'constant' class, or
20964 zero otherwise. When this function returns true, you can apply
20965 dwarf2_get_attr_constant_value to it.
20967 However, note that for some attributes you must check
20968 attr_form_is_section_offset before using this test. DW_FORM_data4
20969 and DW_FORM_data8 are members of both the constant class, and of
20970 the classes that contain offsets into other debug sections
20971 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
20972 that, if an attribute's can be either a constant or one of the
20973 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
20974 taken as section offsets, not constants. */
20977 attr_form_is_constant (const struct attribute
*attr
)
20979 switch (attr
->form
)
20981 case DW_FORM_sdata
:
20982 case DW_FORM_udata
:
20983 case DW_FORM_data1
:
20984 case DW_FORM_data2
:
20985 case DW_FORM_data4
:
20986 case DW_FORM_data8
:
20994 /* DW_ADDR is always stored already as sect_offset; despite for the forms
20995 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
20998 attr_form_is_ref (const struct attribute
*attr
)
21000 switch (attr
->form
)
21002 case DW_FORM_ref_addr
:
21007 case DW_FORM_ref_udata
:
21008 case DW_FORM_GNU_ref_alt
:
21015 /* Return the .debug_loc section to use for CU.
21016 For DWO files use .debug_loc.dwo. */
21018 static struct dwarf2_section_info
*
21019 cu_debug_loc_section (struct dwarf2_cu
*cu
)
21022 return &cu
->dwo_unit
->dwo_file
->sections
.loc
;
21023 return &dwarf2_per_objfile
->loc
;
21026 /* A helper function that fills in a dwarf2_loclist_baton. */
21029 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
21030 struct dwarf2_loclist_baton
*baton
,
21031 const struct attribute
*attr
)
21033 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
21035 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
21037 baton
->per_cu
= cu
->per_cu
;
21038 gdb_assert (baton
->per_cu
);
21039 /* We don't know how long the location list is, but make sure we
21040 don't run off the edge of the section. */
21041 baton
->size
= section
->size
- DW_UNSND (attr
);
21042 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
21043 baton
->base_address
= cu
->base_address
;
21044 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
21048 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
21049 struct dwarf2_cu
*cu
, int is_block
)
21051 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21052 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
21054 if (attr_form_is_section_offset (attr
)
21055 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
21056 the section. If so, fall through to the complaint in the
21058 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
21060 struct dwarf2_loclist_baton
*baton
;
21062 baton
= obstack_alloc (&objfile
->objfile_obstack
,
21063 sizeof (struct dwarf2_loclist_baton
));
21065 fill_in_loclist_baton (cu
, baton
, attr
);
21067 if (cu
->base_known
== 0)
21068 complaint (&symfile_complaints
,
21069 _("Location list used without "
21070 "specifying the CU base address."));
21072 SYMBOL_ACLASS_INDEX (sym
) = (is_block
21073 ? dwarf2_loclist_block_index
21074 : dwarf2_loclist_index
);
21075 SYMBOL_LOCATION_BATON (sym
) = baton
;
21079 struct dwarf2_locexpr_baton
*baton
;
21081 baton
= obstack_alloc (&objfile
->objfile_obstack
,
21082 sizeof (struct dwarf2_locexpr_baton
));
21083 baton
->per_cu
= cu
->per_cu
;
21084 gdb_assert (baton
->per_cu
);
21086 if (attr_form_is_block (attr
))
21088 /* Note that we're just copying the block's data pointer
21089 here, not the actual data. We're still pointing into the
21090 info_buffer for SYM's objfile; right now we never release
21091 that buffer, but when we do clean up properly this may
21093 baton
->size
= DW_BLOCK (attr
)->size
;
21094 baton
->data
= DW_BLOCK (attr
)->data
;
21098 dwarf2_invalid_attrib_class_complaint ("location description",
21099 SYMBOL_NATURAL_NAME (sym
));
21103 SYMBOL_ACLASS_INDEX (sym
) = (is_block
21104 ? dwarf2_locexpr_block_index
21105 : dwarf2_locexpr_index
);
21106 SYMBOL_LOCATION_BATON (sym
) = baton
;
21110 /* Return the OBJFILE associated with the compilation unit CU. If CU
21111 came from a separate debuginfo file, then the master objfile is
21115 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
21117 struct objfile
*objfile
= per_cu
->objfile
;
21119 /* Return the master objfile, so that we can report and look up the
21120 correct file containing this variable. */
21121 if (objfile
->separate_debug_objfile_backlink
)
21122 objfile
= objfile
->separate_debug_objfile_backlink
;
21127 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
21128 (CU_HEADERP is unused in such case) or prepare a temporary copy at
21129 CU_HEADERP first. */
21131 static const struct comp_unit_head
*
21132 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
21133 struct dwarf2_per_cu_data
*per_cu
)
21135 const gdb_byte
*info_ptr
;
21138 return &per_cu
->cu
->header
;
21140 info_ptr
= per_cu
->section
->buffer
+ per_cu
->offset
.sect_off
;
21142 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
21143 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->objfile
->obfd
);
21148 /* Return the address size given in the compilation unit header for CU. */
21151 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
21153 struct comp_unit_head cu_header_local
;
21154 const struct comp_unit_head
*cu_headerp
;
21156 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21158 return cu_headerp
->addr_size
;
21161 /* Return the offset size given in the compilation unit header for CU. */
21164 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
21166 struct comp_unit_head cu_header_local
;
21167 const struct comp_unit_head
*cu_headerp
;
21169 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21171 return cu_headerp
->offset_size
;
21174 /* See its dwarf2loc.h declaration. */
21177 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
21179 struct comp_unit_head cu_header_local
;
21180 const struct comp_unit_head
*cu_headerp
;
21182 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21184 if (cu_headerp
->version
== 2)
21185 return cu_headerp
->addr_size
;
21187 return cu_headerp
->offset_size
;
21190 /* Return the text offset of the CU. The returned offset comes from
21191 this CU's objfile. If this objfile came from a separate debuginfo
21192 file, then the offset may be different from the corresponding
21193 offset in the parent objfile. */
21196 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
21198 struct objfile
*objfile
= per_cu
->objfile
;
21200 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
21203 /* Locate the .debug_info compilation unit from CU's objfile which contains
21204 the DIE at OFFSET. Raises an error on failure. */
21206 static struct dwarf2_per_cu_data
*
21207 dwarf2_find_containing_comp_unit (sect_offset offset
,
21208 unsigned int offset_in_dwz
,
21209 struct objfile
*objfile
)
21211 struct dwarf2_per_cu_data
*this_cu
;
21213 const sect_offset
*cu_off
;
21216 high
= dwarf2_per_objfile
->n_comp_units
- 1;
21219 struct dwarf2_per_cu_data
*mid_cu
;
21220 int mid
= low
+ (high
- low
) / 2;
21222 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
21223 cu_off
= &mid_cu
->offset
;
21224 if (mid_cu
->is_dwz
> offset_in_dwz
21225 || (mid_cu
->is_dwz
== offset_in_dwz
21226 && cu_off
->sect_off
>= offset
.sect_off
))
21231 gdb_assert (low
== high
);
21232 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
21233 cu_off
= &this_cu
->offset
;
21234 if (this_cu
->is_dwz
!= offset_in_dwz
|| cu_off
->sect_off
> offset
.sect_off
)
21236 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
21237 error (_("Dwarf Error: could not find partial DIE containing "
21238 "offset 0x%lx [in module %s]"),
21239 (long) offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
21241 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
.sect_off
21242 <= offset
.sect_off
);
21243 return dwarf2_per_objfile
->all_comp_units
[low
-1];
21247 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
21248 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
21249 && offset
.sect_off
>= this_cu
->offset
.sect_off
+ this_cu
->length
)
21250 error (_("invalid dwarf2 offset %u"), offset
.sect_off
);
21251 gdb_assert (offset
.sect_off
< this_cu
->offset
.sect_off
+ this_cu
->length
);
21256 /* Initialize dwarf2_cu CU, owned by PER_CU. */
21259 init_one_comp_unit (struct dwarf2_cu
*cu
, struct dwarf2_per_cu_data
*per_cu
)
21261 memset (cu
, 0, sizeof (*cu
));
21263 cu
->per_cu
= per_cu
;
21264 cu
->objfile
= per_cu
->objfile
;
21265 obstack_init (&cu
->comp_unit_obstack
);
21268 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
21271 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
21272 enum language pretend_language
)
21274 struct attribute
*attr
;
21276 /* Set the language we're debugging. */
21277 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
21279 set_cu_language (DW_UNSND (attr
), cu
);
21282 cu
->language
= pretend_language
;
21283 cu
->language_defn
= language_def (cu
->language
);
21286 attr
= dwarf2_attr (comp_unit_die
, DW_AT_producer
, cu
);
21288 cu
->producer
= DW_STRING (attr
);
21291 /* Release one cached compilation unit, CU. We unlink it from the tree
21292 of compilation units, but we don't remove it from the read_in_chain;
21293 the caller is responsible for that.
21294 NOTE: DATA is a void * because this function is also used as a
21295 cleanup routine. */
21298 free_heap_comp_unit (void *data
)
21300 struct dwarf2_cu
*cu
= data
;
21302 gdb_assert (cu
->per_cu
!= NULL
);
21303 cu
->per_cu
->cu
= NULL
;
21306 obstack_free (&cu
->comp_unit_obstack
, NULL
);
21311 /* This cleanup function is passed the address of a dwarf2_cu on the stack
21312 when we're finished with it. We can't free the pointer itself, but be
21313 sure to unlink it from the cache. Also release any associated storage. */
21316 free_stack_comp_unit (void *data
)
21318 struct dwarf2_cu
*cu
= data
;
21320 gdb_assert (cu
->per_cu
!= NULL
);
21321 cu
->per_cu
->cu
= NULL
;
21324 obstack_free (&cu
->comp_unit_obstack
, NULL
);
21325 cu
->partial_dies
= NULL
;
21328 /* Free all cached compilation units. */
21331 free_cached_comp_units (void *data
)
21333 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
21335 per_cu
= dwarf2_per_objfile
->read_in_chain
;
21336 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
21337 while (per_cu
!= NULL
)
21339 struct dwarf2_per_cu_data
*next_cu
;
21341 next_cu
= per_cu
->cu
->read_in_chain
;
21343 free_heap_comp_unit (per_cu
->cu
);
21344 *last_chain
= next_cu
;
21350 /* Increase the age counter on each cached compilation unit, and free
21351 any that are too old. */
21354 age_cached_comp_units (void)
21356 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
21358 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
21359 per_cu
= dwarf2_per_objfile
->read_in_chain
;
21360 while (per_cu
!= NULL
)
21362 per_cu
->cu
->last_used
++;
21363 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
21364 dwarf2_mark (per_cu
->cu
);
21365 per_cu
= per_cu
->cu
->read_in_chain
;
21368 per_cu
= dwarf2_per_objfile
->read_in_chain
;
21369 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
21370 while (per_cu
!= NULL
)
21372 struct dwarf2_per_cu_data
*next_cu
;
21374 next_cu
= per_cu
->cu
->read_in_chain
;
21376 if (!per_cu
->cu
->mark
)
21378 free_heap_comp_unit (per_cu
->cu
);
21379 *last_chain
= next_cu
;
21382 last_chain
= &per_cu
->cu
->read_in_chain
;
21388 /* Remove a single compilation unit from the cache. */
21391 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
21393 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
21395 per_cu
= dwarf2_per_objfile
->read_in_chain
;
21396 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
21397 while (per_cu
!= NULL
)
21399 struct dwarf2_per_cu_data
*next_cu
;
21401 next_cu
= per_cu
->cu
->read_in_chain
;
21403 if (per_cu
== target_per_cu
)
21405 free_heap_comp_unit (per_cu
->cu
);
21407 *last_chain
= next_cu
;
21411 last_chain
= &per_cu
->cu
->read_in_chain
;
21417 /* Release all extra memory associated with OBJFILE. */
21420 dwarf2_free_objfile (struct objfile
*objfile
)
21422 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
21424 if (dwarf2_per_objfile
== NULL
)
21427 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
21428 free_cached_comp_units (NULL
);
21430 if (dwarf2_per_objfile
->quick_file_names_table
)
21431 htab_delete (dwarf2_per_objfile
->quick_file_names_table
);
21433 /* Everything else should be on the objfile obstack. */
21436 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
21437 We store these in a hash table separate from the DIEs, and preserve them
21438 when the DIEs are flushed out of cache.
21440 The CU "per_cu" pointer is needed because offset alone is not enough to
21441 uniquely identify the type. A file may have multiple .debug_types sections,
21442 or the type may come from a DWO file. Furthermore, while it's more logical
21443 to use per_cu->section+offset, with Fission the section with the data is in
21444 the DWO file but we don't know that section at the point we need it.
21445 We have to use something in dwarf2_per_cu_data (or the pointer to it)
21446 because we can enter the lookup routine, get_die_type_at_offset, from
21447 outside this file, and thus won't necessarily have PER_CU->cu.
21448 Fortunately, PER_CU is stable for the life of the objfile. */
21450 struct dwarf2_per_cu_offset_and_type
21452 const struct dwarf2_per_cu_data
*per_cu
;
21453 sect_offset offset
;
21457 /* Hash function for a dwarf2_per_cu_offset_and_type. */
21460 per_cu_offset_and_type_hash (const void *item
)
21462 const struct dwarf2_per_cu_offset_and_type
*ofs
= item
;
21464 return (uintptr_t) ofs
->per_cu
+ ofs
->offset
.sect_off
;
21467 /* Equality function for a dwarf2_per_cu_offset_and_type. */
21470 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
21472 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
= item_lhs
;
21473 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
= item_rhs
;
21475 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
21476 && ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
);
21479 /* Set the type associated with DIE to TYPE. Save it in CU's hash
21480 table if necessary. For convenience, return TYPE.
21482 The DIEs reading must have careful ordering to:
21483 * Not cause infite loops trying to read in DIEs as a prerequisite for
21484 reading current DIE.
21485 * Not trying to dereference contents of still incompletely read in types
21486 while reading in other DIEs.
21487 * Enable referencing still incompletely read in types just by a pointer to
21488 the type without accessing its fields.
21490 Therefore caller should follow these rules:
21491 * Try to fetch any prerequisite types we may need to build this DIE type
21492 before building the type and calling set_die_type.
21493 * After building type call set_die_type for current DIE as soon as
21494 possible before fetching more types to complete the current type.
21495 * Make the type as complete as possible before fetching more types. */
21497 static struct type
*
21498 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
21500 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
21501 struct objfile
*objfile
= cu
->objfile
;
21503 /* For Ada types, make sure that the gnat-specific data is always
21504 initialized (if not already set). There are a few types where
21505 we should not be doing so, because the type-specific area is
21506 already used to hold some other piece of info (eg: TYPE_CODE_FLT
21507 where the type-specific area is used to store the floatformat).
21508 But this is not a problem, because the gnat-specific information
21509 is actually not needed for these types. */
21510 if (need_gnat_info (cu
)
21511 && TYPE_CODE (type
) != TYPE_CODE_FUNC
21512 && TYPE_CODE (type
) != TYPE_CODE_FLT
21513 && !HAVE_GNAT_AUX_INFO (type
))
21514 INIT_GNAT_SPECIFIC (type
);
21516 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
21518 dwarf2_per_objfile
->die_type_hash
=
21519 htab_create_alloc_ex (127,
21520 per_cu_offset_and_type_hash
,
21521 per_cu_offset_and_type_eq
,
21523 &objfile
->objfile_obstack
,
21524 hashtab_obstack_allocate
,
21525 dummy_obstack_deallocate
);
21528 ofs
.per_cu
= cu
->per_cu
;
21529 ofs
.offset
= die
->offset
;
21531 slot
= (struct dwarf2_per_cu_offset_and_type
**)
21532 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
21534 complaint (&symfile_complaints
,
21535 _("A problem internal to GDB: DIE 0x%x has type already set"),
21536 die
->offset
.sect_off
);
21537 *slot
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (**slot
));
21542 /* Look up the type for the die at OFFSET in PER_CU in die_type_hash,
21543 or return NULL if the die does not have a saved type. */
21545 static struct type
*
21546 get_die_type_at_offset (sect_offset offset
,
21547 struct dwarf2_per_cu_data
*per_cu
)
21549 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
21551 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
21554 ofs
.per_cu
= per_cu
;
21555 ofs
.offset
= offset
;
21556 slot
= htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
);
21563 /* Look up the type for DIE in CU in die_type_hash,
21564 or return NULL if DIE does not have a saved type. */
21566 static struct type
*
21567 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21569 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
21572 /* Add a dependence relationship from CU to REF_PER_CU. */
21575 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
21576 struct dwarf2_per_cu_data
*ref_per_cu
)
21580 if (cu
->dependencies
== NULL
)
21582 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
21583 NULL
, &cu
->comp_unit_obstack
,
21584 hashtab_obstack_allocate
,
21585 dummy_obstack_deallocate
);
21587 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
21589 *slot
= ref_per_cu
;
21592 /* Subroutine of dwarf2_mark to pass to htab_traverse.
21593 Set the mark field in every compilation unit in the
21594 cache that we must keep because we are keeping CU. */
21597 dwarf2_mark_helper (void **slot
, void *data
)
21599 struct dwarf2_per_cu_data
*per_cu
;
21601 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
21603 /* cu->dependencies references may not yet have been ever read if QUIT aborts
21604 reading of the chain. As such dependencies remain valid it is not much
21605 useful to track and undo them during QUIT cleanups. */
21606 if (per_cu
->cu
== NULL
)
21609 if (per_cu
->cu
->mark
)
21611 per_cu
->cu
->mark
= 1;
21613 if (per_cu
->cu
->dependencies
!= NULL
)
21614 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
21619 /* Set the mark field in CU and in every other compilation unit in the
21620 cache that we must keep because we are keeping CU. */
21623 dwarf2_mark (struct dwarf2_cu
*cu
)
21628 if (cu
->dependencies
!= NULL
)
21629 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
21633 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
21637 per_cu
->cu
->mark
= 0;
21638 per_cu
= per_cu
->cu
->read_in_chain
;
21642 /* Trivial hash function for partial_die_info: the hash value of a DIE
21643 is its offset in .debug_info for this objfile. */
21646 partial_die_hash (const void *item
)
21648 const struct partial_die_info
*part_die
= item
;
21650 return part_die
->offset
.sect_off
;
21653 /* Trivial comparison function for partial_die_info structures: two DIEs
21654 are equal if they have the same offset. */
21657 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
21659 const struct partial_die_info
*part_die_lhs
= item_lhs
;
21660 const struct partial_die_info
*part_die_rhs
= item_rhs
;
21662 return part_die_lhs
->offset
.sect_off
== part_die_rhs
->offset
.sect_off
;
21665 static struct cmd_list_element
*set_dwarf2_cmdlist
;
21666 static struct cmd_list_element
*show_dwarf2_cmdlist
;
21669 set_dwarf2_cmd (char *args
, int from_tty
)
21671 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
21675 show_dwarf2_cmd (char *args
, int from_tty
)
21677 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
21680 /* Free data associated with OBJFILE, if necessary. */
21683 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
21685 struct dwarf2_per_objfile
*data
= d
;
21688 /* Make sure we don't accidentally use dwarf2_per_objfile while
21690 dwarf2_per_objfile
= NULL
;
21692 for (ix
= 0; ix
< data
->n_comp_units
; ++ix
)
21693 VEC_free (dwarf2_per_cu_ptr
, data
->all_comp_units
[ix
]->imported_symtabs
);
21695 for (ix
= 0; ix
< data
->n_type_units
; ++ix
)
21696 VEC_free (dwarf2_per_cu_ptr
,
21697 data
->all_type_units
[ix
]->per_cu
.imported_symtabs
);
21698 xfree (data
->all_type_units
);
21700 VEC_free (dwarf2_section_info_def
, data
->types
);
21702 if (data
->dwo_files
)
21703 free_dwo_files (data
->dwo_files
, objfile
);
21704 if (data
->dwp_file
)
21705 gdb_bfd_unref (data
->dwp_file
->dbfd
);
21707 if (data
->dwz_file
&& data
->dwz_file
->dwz_bfd
)
21708 gdb_bfd_unref (data
->dwz_file
->dwz_bfd
);
21712 /* The "save gdb-index" command. */
21714 /* The contents of the hash table we create when building the string
21716 struct strtab_entry
21718 offset_type offset
;
21722 /* Hash function for a strtab_entry.
21724 Function is used only during write_hash_table so no index format backward
21725 compatibility is needed. */
21728 hash_strtab_entry (const void *e
)
21730 const struct strtab_entry
*entry
= e
;
21731 return mapped_index_string_hash (INT_MAX
, entry
->str
);
21734 /* Equality function for a strtab_entry. */
21737 eq_strtab_entry (const void *a
, const void *b
)
21739 const struct strtab_entry
*ea
= a
;
21740 const struct strtab_entry
*eb
= b
;
21741 return !strcmp (ea
->str
, eb
->str
);
21744 /* Create a strtab_entry hash table. */
21747 create_strtab (void)
21749 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
21750 xfree
, xcalloc
, xfree
);
21753 /* Add a string to the constant pool. Return the string's offset in
21757 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
21760 struct strtab_entry entry
;
21761 struct strtab_entry
*result
;
21764 slot
= htab_find_slot (table
, &entry
, INSERT
);
21769 result
= XNEW (struct strtab_entry
);
21770 result
->offset
= obstack_object_size (cpool
);
21772 obstack_grow_str0 (cpool
, str
);
21775 return result
->offset
;
21778 /* An entry in the symbol table. */
21779 struct symtab_index_entry
21781 /* The name of the symbol. */
21783 /* The offset of the name in the constant pool. */
21784 offset_type index_offset
;
21785 /* A sorted vector of the indices of all the CUs that hold an object
21787 VEC (offset_type
) *cu_indices
;
21790 /* The symbol table. This is a power-of-2-sized hash table. */
21791 struct mapped_symtab
21793 offset_type n_elements
;
21795 struct symtab_index_entry
**data
;
21798 /* Hash function for a symtab_index_entry. */
21801 hash_symtab_entry (const void *e
)
21803 const struct symtab_index_entry
*entry
= e
;
21804 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
21805 sizeof (offset_type
) * VEC_length (offset_type
,
21806 entry
->cu_indices
),
21810 /* Equality function for a symtab_index_entry. */
21813 eq_symtab_entry (const void *a
, const void *b
)
21815 const struct symtab_index_entry
*ea
= a
;
21816 const struct symtab_index_entry
*eb
= b
;
21817 int len
= VEC_length (offset_type
, ea
->cu_indices
);
21818 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
21820 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
21821 VEC_address (offset_type
, eb
->cu_indices
),
21822 sizeof (offset_type
) * len
);
21825 /* Destroy a symtab_index_entry. */
21828 delete_symtab_entry (void *p
)
21830 struct symtab_index_entry
*entry
= p
;
21831 VEC_free (offset_type
, entry
->cu_indices
);
21835 /* Create a hash table holding symtab_index_entry objects. */
21838 create_symbol_hash_table (void)
21840 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
21841 delete_symtab_entry
, xcalloc
, xfree
);
21844 /* Create a new mapped symtab object. */
21846 static struct mapped_symtab
*
21847 create_mapped_symtab (void)
21849 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
21850 symtab
->n_elements
= 0;
21851 symtab
->size
= 1024;
21852 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
21856 /* Destroy a mapped_symtab. */
21859 cleanup_mapped_symtab (void *p
)
21861 struct mapped_symtab
*symtab
= p
;
21862 /* The contents of the array are freed when the other hash table is
21864 xfree (symtab
->data
);
21868 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
21871 Function is used only during write_hash_table so no index format backward
21872 compatibility is needed. */
21874 static struct symtab_index_entry
**
21875 find_slot (struct mapped_symtab
*symtab
, const char *name
)
21877 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
21879 index
= hash
& (symtab
->size
- 1);
21880 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
21884 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
21885 return &symtab
->data
[index
];
21886 index
= (index
+ step
) & (symtab
->size
- 1);
21890 /* Expand SYMTAB's hash table. */
21893 hash_expand (struct mapped_symtab
*symtab
)
21895 offset_type old_size
= symtab
->size
;
21897 struct symtab_index_entry
**old_entries
= symtab
->data
;
21900 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
21902 for (i
= 0; i
< old_size
; ++i
)
21904 if (old_entries
[i
])
21906 struct symtab_index_entry
**slot
= find_slot (symtab
,
21907 old_entries
[i
]->name
);
21908 *slot
= old_entries
[i
];
21912 xfree (old_entries
);
21915 /* Add an entry to SYMTAB. NAME is the name of the symbol.
21916 CU_INDEX is the index of the CU in which the symbol appears.
21917 IS_STATIC is one if the symbol is static, otherwise zero (global). */
21920 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
21921 int is_static
, gdb_index_symbol_kind kind
,
21922 offset_type cu_index
)
21924 struct symtab_index_entry
**slot
;
21925 offset_type cu_index_and_attrs
;
21927 ++symtab
->n_elements
;
21928 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
21929 hash_expand (symtab
);
21931 slot
= find_slot (symtab
, name
);
21934 *slot
= XNEW (struct symtab_index_entry
);
21935 (*slot
)->name
= name
;
21936 /* index_offset is set later. */
21937 (*slot
)->cu_indices
= NULL
;
21940 cu_index_and_attrs
= 0;
21941 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs
, cu_index
);
21942 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs
, is_static
);
21943 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs
, kind
);
21945 /* We don't want to record an index value twice as we want to avoid the
21947 We process all global symbols and then all static symbols
21948 (which would allow us to avoid the duplication by only having to check
21949 the last entry pushed), but a symbol could have multiple kinds in one CU.
21950 To keep things simple we don't worry about the duplication here and
21951 sort and uniqufy the list after we've processed all symbols. */
21952 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index_and_attrs
);
21955 /* qsort helper routine for uniquify_cu_indices. */
21958 offset_type_compare (const void *ap
, const void *bp
)
21960 offset_type a
= *(offset_type
*) ap
;
21961 offset_type b
= *(offset_type
*) bp
;
21963 return (a
> b
) - (b
> a
);
21966 /* Sort and remove duplicates of all symbols' cu_indices lists. */
21969 uniquify_cu_indices (struct mapped_symtab
*symtab
)
21973 for (i
= 0; i
< symtab
->size
; ++i
)
21975 struct symtab_index_entry
*entry
= symtab
->data
[i
];
21978 && entry
->cu_indices
!= NULL
)
21980 unsigned int next_to_insert
, next_to_check
;
21981 offset_type last_value
;
21983 qsort (VEC_address (offset_type
, entry
->cu_indices
),
21984 VEC_length (offset_type
, entry
->cu_indices
),
21985 sizeof (offset_type
), offset_type_compare
);
21987 last_value
= VEC_index (offset_type
, entry
->cu_indices
, 0);
21988 next_to_insert
= 1;
21989 for (next_to_check
= 1;
21990 next_to_check
< VEC_length (offset_type
, entry
->cu_indices
);
21993 if (VEC_index (offset_type
, entry
->cu_indices
, next_to_check
)
21996 last_value
= VEC_index (offset_type
, entry
->cu_indices
,
21998 VEC_replace (offset_type
, entry
->cu_indices
, next_to_insert
,
22003 VEC_truncate (offset_type
, entry
->cu_indices
, next_to_insert
);
22008 /* Add a vector of indices to the constant pool. */
22011 add_indices_to_cpool (htab_t symbol_hash_table
, struct obstack
*cpool
,
22012 struct symtab_index_entry
*entry
)
22016 slot
= htab_find_slot (symbol_hash_table
, entry
, INSERT
);
22019 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
22020 offset_type val
= MAYBE_SWAP (len
);
22025 entry
->index_offset
= obstack_object_size (cpool
);
22027 obstack_grow (cpool
, &val
, sizeof (val
));
22029 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
22032 val
= MAYBE_SWAP (iter
);
22033 obstack_grow (cpool
, &val
, sizeof (val
));
22038 struct symtab_index_entry
*old_entry
= *slot
;
22039 entry
->index_offset
= old_entry
->index_offset
;
22042 return entry
->index_offset
;
22045 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
22046 constant pool entries going into the obstack CPOOL. */
22049 write_hash_table (struct mapped_symtab
*symtab
,
22050 struct obstack
*output
, struct obstack
*cpool
)
22053 htab_t symbol_hash_table
;
22056 symbol_hash_table
= create_symbol_hash_table ();
22057 str_table
= create_strtab ();
22059 /* We add all the index vectors to the constant pool first, to
22060 ensure alignment is ok. */
22061 for (i
= 0; i
< symtab
->size
; ++i
)
22063 if (symtab
->data
[i
])
22064 add_indices_to_cpool (symbol_hash_table
, cpool
, symtab
->data
[i
]);
22067 /* Now write out the hash table. */
22068 for (i
= 0; i
< symtab
->size
; ++i
)
22070 offset_type str_off
, vec_off
;
22072 if (symtab
->data
[i
])
22074 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
22075 vec_off
= symtab
->data
[i
]->index_offset
;
22079 /* While 0 is a valid constant pool index, it is not valid
22080 to have 0 for both offsets. */
22085 str_off
= MAYBE_SWAP (str_off
);
22086 vec_off
= MAYBE_SWAP (vec_off
);
22088 obstack_grow (output
, &str_off
, sizeof (str_off
));
22089 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
22092 htab_delete (str_table
);
22093 htab_delete (symbol_hash_table
);
22096 /* Struct to map psymtab to CU index in the index file. */
22097 struct psymtab_cu_index_map
22099 struct partial_symtab
*psymtab
;
22100 unsigned int cu_index
;
22104 hash_psymtab_cu_index (const void *item
)
22106 const struct psymtab_cu_index_map
*map
= item
;
22108 return htab_hash_pointer (map
->psymtab
);
22112 eq_psymtab_cu_index (const void *item_lhs
, const void *item_rhs
)
22114 const struct psymtab_cu_index_map
*lhs
= item_lhs
;
22115 const struct psymtab_cu_index_map
*rhs
= item_rhs
;
22117 return lhs
->psymtab
== rhs
->psymtab
;
22120 /* Helper struct for building the address table. */
22121 struct addrmap_index_data
22123 struct objfile
*objfile
;
22124 struct obstack
*addr_obstack
;
22125 htab_t cu_index_htab
;
22127 /* Non-zero if the previous_* fields are valid.
22128 We can't write an entry until we see the next entry (since it is only then
22129 that we know the end of the entry). */
22130 int previous_valid
;
22131 /* Index of the CU in the table of all CUs in the index file. */
22132 unsigned int previous_cu_index
;
22133 /* Start address of the CU. */
22134 CORE_ADDR previous_cu_start
;
22137 /* Write an address entry to OBSTACK. */
22140 add_address_entry (struct objfile
*objfile
, struct obstack
*obstack
,
22141 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
22143 offset_type cu_index_to_write
;
22145 CORE_ADDR baseaddr
;
22147 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
22149 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
22150 obstack_grow (obstack
, addr
, 8);
22151 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
22152 obstack_grow (obstack
, addr
, 8);
22153 cu_index_to_write
= MAYBE_SWAP (cu_index
);
22154 obstack_grow (obstack
, &cu_index_to_write
, sizeof (offset_type
));
22157 /* Worker function for traversing an addrmap to build the address table. */
22160 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
22162 struct addrmap_index_data
*data
= datap
;
22163 struct partial_symtab
*pst
= obj
;
22165 if (data
->previous_valid
)
22166 add_address_entry (data
->objfile
, data
->addr_obstack
,
22167 data
->previous_cu_start
, start_addr
,
22168 data
->previous_cu_index
);
22170 data
->previous_cu_start
= start_addr
;
22173 struct psymtab_cu_index_map find_map
, *map
;
22174 find_map
.psymtab
= pst
;
22175 map
= htab_find (data
->cu_index_htab
, &find_map
);
22176 gdb_assert (map
!= NULL
);
22177 data
->previous_cu_index
= map
->cu_index
;
22178 data
->previous_valid
= 1;
22181 data
->previous_valid
= 0;
22186 /* Write OBJFILE's address map to OBSTACK.
22187 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
22188 in the index file. */
22191 write_address_map (struct objfile
*objfile
, struct obstack
*obstack
,
22192 htab_t cu_index_htab
)
22194 struct addrmap_index_data addrmap_index_data
;
22196 /* When writing the address table, we have to cope with the fact that
22197 the addrmap iterator only provides the start of a region; we have to
22198 wait until the next invocation to get the start of the next region. */
22200 addrmap_index_data
.objfile
= objfile
;
22201 addrmap_index_data
.addr_obstack
= obstack
;
22202 addrmap_index_data
.cu_index_htab
= cu_index_htab
;
22203 addrmap_index_data
.previous_valid
= 0;
22205 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
22206 &addrmap_index_data
);
22208 /* It's highly unlikely the last entry (end address = 0xff...ff)
22209 is valid, but we should still handle it.
22210 The end address is recorded as the start of the next region, but that
22211 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
22213 if (addrmap_index_data
.previous_valid
)
22214 add_address_entry (objfile
, obstack
,
22215 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
22216 addrmap_index_data
.previous_cu_index
);
22219 /* Return the symbol kind of PSYM. */
22221 static gdb_index_symbol_kind
22222 symbol_kind (struct partial_symbol
*psym
)
22224 domain_enum domain
= PSYMBOL_DOMAIN (psym
);
22225 enum address_class aclass
= PSYMBOL_CLASS (psym
);
22233 return GDB_INDEX_SYMBOL_KIND_FUNCTION
;
22235 return GDB_INDEX_SYMBOL_KIND_TYPE
;
22237 case LOC_CONST_BYTES
:
22238 case LOC_OPTIMIZED_OUT
:
22240 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
22242 /* Note: It's currently impossible to recognize psyms as enum values
22243 short of reading the type info. For now punt. */
22244 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
22246 /* There are other LOC_FOO values that one might want to classify
22247 as variables, but dwarf2read.c doesn't currently use them. */
22248 return GDB_INDEX_SYMBOL_KIND_OTHER
;
22250 case STRUCT_DOMAIN
:
22251 return GDB_INDEX_SYMBOL_KIND_TYPE
;
22253 return GDB_INDEX_SYMBOL_KIND_OTHER
;
22257 /* Add a list of partial symbols to SYMTAB. */
22260 write_psymbols (struct mapped_symtab
*symtab
,
22262 struct partial_symbol
**psymp
,
22264 offset_type cu_index
,
22267 for (; count
-- > 0; ++psymp
)
22269 struct partial_symbol
*psym
= *psymp
;
22272 if (SYMBOL_LANGUAGE (psym
) == language_ada
)
22273 error (_("Ada is not currently supported by the index"));
22275 /* Only add a given psymbol once. */
22276 slot
= htab_find_slot (psyms_seen
, psym
, INSERT
);
22279 gdb_index_symbol_kind kind
= symbol_kind (psym
);
22282 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (psym
),
22283 is_static
, kind
, cu_index
);
22288 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
22289 exception if there is an error. */
22292 write_obstack (FILE *file
, struct obstack
*obstack
)
22294 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
22296 != obstack_object_size (obstack
))
22297 error (_("couldn't data write to file"));
22300 /* Unlink a file if the argument is not NULL. */
22303 unlink_if_set (void *p
)
22305 char **filename
= p
;
22307 unlink (*filename
);
22310 /* A helper struct used when iterating over debug_types. */
22311 struct signatured_type_index_data
22313 struct objfile
*objfile
;
22314 struct mapped_symtab
*symtab
;
22315 struct obstack
*types_list
;
22320 /* A helper function that writes a single signatured_type to an
22324 write_one_signatured_type (void **slot
, void *d
)
22326 struct signatured_type_index_data
*info
= d
;
22327 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
22328 struct partial_symtab
*psymtab
= entry
->per_cu
.v
.psymtab
;
22331 write_psymbols (info
->symtab
,
22333 info
->objfile
->global_psymbols
.list
22334 + psymtab
->globals_offset
,
22335 psymtab
->n_global_syms
, info
->cu_index
,
22337 write_psymbols (info
->symtab
,
22339 info
->objfile
->static_psymbols
.list
22340 + psymtab
->statics_offset
,
22341 psymtab
->n_static_syms
, info
->cu_index
,
22344 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
22345 entry
->per_cu
.offset
.sect_off
);
22346 obstack_grow (info
->types_list
, val
, 8);
22347 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
22348 entry
->type_offset_in_tu
.cu_off
);
22349 obstack_grow (info
->types_list
, val
, 8);
22350 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
22351 obstack_grow (info
->types_list
, val
, 8);
22358 /* Recurse into all "included" dependencies and write their symbols as
22359 if they appeared in this psymtab. */
22362 recursively_write_psymbols (struct objfile
*objfile
,
22363 struct partial_symtab
*psymtab
,
22364 struct mapped_symtab
*symtab
,
22366 offset_type cu_index
)
22370 for (i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
22371 if (psymtab
->dependencies
[i
]->user
!= NULL
)
22372 recursively_write_psymbols (objfile
, psymtab
->dependencies
[i
],
22373 symtab
, psyms_seen
, cu_index
);
22375 write_psymbols (symtab
,
22377 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
22378 psymtab
->n_global_syms
, cu_index
,
22380 write_psymbols (symtab
,
22382 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
22383 psymtab
->n_static_syms
, cu_index
,
22387 /* Create an index file for OBJFILE in the directory DIR. */
22390 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
22392 struct cleanup
*cleanup
;
22393 char *filename
, *cleanup_filename
;
22394 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
22395 struct obstack cu_list
, types_cu_list
;
22398 struct mapped_symtab
*symtab
;
22399 offset_type val
, size_of_contents
, total_len
;
22402 htab_t cu_index_htab
;
22403 struct psymtab_cu_index_map
*psymtab_cu_index_map
;
22405 if (dwarf2_per_objfile
->using_index
)
22406 error (_("Cannot use an index to create the index"));
22408 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
22409 error (_("Cannot make an index when the file has multiple .debug_types sections"));
22411 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
22414 if (stat (objfile_name (objfile
), &st
) < 0)
22415 perror_with_name (objfile_name (objfile
));
22417 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile_name (objfile
)),
22418 INDEX_SUFFIX
, (char *) NULL
);
22419 cleanup
= make_cleanup (xfree
, filename
);
22421 out_file
= gdb_fopen_cloexec (filename
, "wb");
22423 error (_("Can't open `%s' for writing"), filename
);
22425 cleanup_filename
= filename
;
22426 make_cleanup (unlink_if_set
, &cleanup_filename
);
22428 symtab
= create_mapped_symtab ();
22429 make_cleanup (cleanup_mapped_symtab
, symtab
);
22431 obstack_init (&addr_obstack
);
22432 make_cleanup_obstack_free (&addr_obstack
);
22434 obstack_init (&cu_list
);
22435 make_cleanup_obstack_free (&cu_list
);
22437 obstack_init (&types_cu_list
);
22438 make_cleanup_obstack_free (&types_cu_list
);
22440 psyms_seen
= htab_create_alloc (100, htab_hash_pointer
, htab_eq_pointer
,
22441 NULL
, xcalloc
, xfree
);
22442 make_cleanup_htab_delete (psyms_seen
);
22444 /* While we're scanning CU's create a table that maps a psymtab pointer
22445 (which is what addrmap records) to its index (which is what is recorded
22446 in the index file). This will later be needed to write the address
22448 cu_index_htab
= htab_create_alloc (100,
22449 hash_psymtab_cu_index
,
22450 eq_psymtab_cu_index
,
22451 NULL
, xcalloc
, xfree
);
22452 make_cleanup_htab_delete (cu_index_htab
);
22453 psymtab_cu_index_map
= (struct psymtab_cu_index_map
*)
22454 xmalloc (sizeof (struct psymtab_cu_index_map
)
22455 * dwarf2_per_objfile
->n_comp_units
);
22456 make_cleanup (xfree
, psymtab_cu_index_map
);
22458 /* The CU list is already sorted, so we don't need to do additional
22459 work here. Also, the debug_types entries do not appear in
22460 all_comp_units, but only in their own hash table. */
22461 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
22463 struct dwarf2_per_cu_data
*per_cu
22464 = dwarf2_per_objfile
->all_comp_units
[i
];
22465 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
22467 struct psymtab_cu_index_map
*map
;
22470 /* CU of a shared file from 'dwz -m' may be unused by this main file.
22471 It may be referenced from a local scope but in such case it does not
22472 need to be present in .gdb_index. */
22473 if (psymtab
== NULL
)
22476 if (psymtab
->user
== NULL
)
22477 recursively_write_psymbols (objfile
, psymtab
, symtab
, psyms_seen
, i
);
22479 map
= &psymtab_cu_index_map
[i
];
22480 map
->psymtab
= psymtab
;
22482 slot
= htab_find_slot (cu_index_htab
, map
, INSERT
);
22483 gdb_assert (slot
!= NULL
);
22484 gdb_assert (*slot
== NULL
);
22487 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
22488 per_cu
->offset
.sect_off
);
22489 obstack_grow (&cu_list
, val
, 8);
22490 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
22491 obstack_grow (&cu_list
, val
, 8);
22494 /* Dump the address map. */
22495 write_address_map (objfile
, &addr_obstack
, cu_index_htab
);
22497 /* Write out the .debug_type entries, if any. */
22498 if (dwarf2_per_objfile
->signatured_types
)
22500 struct signatured_type_index_data sig_data
;
22502 sig_data
.objfile
= objfile
;
22503 sig_data
.symtab
= symtab
;
22504 sig_data
.types_list
= &types_cu_list
;
22505 sig_data
.psyms_seen
= psyms_seen
;
22506 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
22507 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
22508 write_one_signatured_type
, &sig_data
);
22511 /* Now that we've processed all symbols we can shrink their cu_indices
22513 uniquify_cu_indices (symtab
);
22515 obstack_init (&constant_pool
);
22516 make_cleanup_obstack_free (&constant_pool
);
22517 obstack_init (&symtab_obstack
);
22518 make_cleanup_obstack_free (&symtab_obstack
);
22519 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
22521 obstack_init (&contents
);
22522 make_cleanup_obstack_free (&contents
);
22523 size_of_contents
= 6 * sizeof (offset_type
);
22524 total_len
= size_of_contents
;
22526 /* The version number. */
22527 val
= MAYBE_SWAP (8);
22528 obstack_grow (&contents
, &val
, sizeof (val
));
22530 /* The offset of the CU list from the start of the file. */
22531 val
= MAYBE_SWAP (total_len
);
22532 obstack_grow (&contents
, &val
, sizeof (val
));
22533 total_len
+= obstack_object_size (&cu_list
);
22535 /* The offset of the types CU list from the start of the file. */
22536 val
= MAYBE_SWAP (total_len
);
22537 obstack_grow (&contents
, &val
, sizeof (val
));
22538 total_len
+= obstack_object_size (&types_cu_list
);
22540 /* The offset of the address table from the start of the file. */
22541 val
= MAYBE_SWAP (total_len
);
22542 obstack_grow (&contents
, &val
, sizeof (val
));
22543 total_len
+= obstack_object_size (&addr_obstack
);
22545 /* The offset of the symbol table from the start of the file. */
22546 val
= MAYBE_SWAP (total_len
);
22547 obstack_grow (&contents
, &val
, sizeof (val
));
22548 total_len
+= obstack_object_size (&symtab_obstack
);
22550 /* The offset of the constant pool from the start of the file. */
22551 val
= MAYBE_SWAP (total_len
);
22552 obstack_grow (&contents
, &val
, sizeof (val
));
22553 total_len
+= obstack_object_size (&constant_pool
);
22555 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
22557 write_obstack (out_file
, &contents
);
22558 write_obstack (out_file
, &cu_list
);
22559 write_obstack (out_file
, &types_cu_list
);
22560 write_obstack (out_file
, &addr_obstack
);
22561 write_obstack (out_file
, &symtab_obstack
);
22562 write_obstack (out_file
, &constant_pool
);
22566 /* We want to keep the file, so we set cleanup_filename to NULL
22567 here. See unlink_if_set. */
22568 cleanup_filename
= NULL
;
22570 do_cleanups (cleanup
);
22573 /* Implementation of the `save gdb-index' command.
22575 Note that the file format used by this command is documented in the
22576 GDB manual. Any changes here must be documented there. */
22579 save_gdb_index_command (char *arg
, int from_tty
)
22581 struct objfile
*objfile
;
22584 error (_("usage: save gdb-index DIRECTORY"));
22586 ALL_OBJFILES (objfile
)
22590 /* If the objfile does not correspond to an actual file, skip it. */
22591 if (stat (objfile_name (objfile
), &st
) < 0)
22594 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
22595 if (dwarf2_per_objfile
)
22597 volatile struct gdb_exception except
;
22599 TRY_CATCH (except
, RETURN_MASK_ERROR
)
22601 write_psymtabs_to_index (objfile
, arg
);
22603 if (except
.reason
< 0)
22604 exception_fprintf (gdb_stderr
, except
,
22605 _("Error while writing index for `%s': "),
22606 objfile_name (objfile
));
22613 int dwarf2_always_disassemble
;
22616 show_dwarf2_always_disassemble (struct ui_file
*file
, int from_tty
,
22617 struct cmd_list_element
*c
, const char *value
)
22619 fprintf_filtered (file
,
22620 _("Whether to always disassemble "
22621 "DWARF expressions is %s.\n"),
22626 show_check_physname (struct ui_file
*file
, int from_tty
,
22627 struct cmd_list_element
*c
, const char *value
)
22629 fprintf_filtered (file
,
22630 _("Whether to check \"physname\" is %s.\n"),
22634 void _initialize_dwarf2_read (void);
22637 _initialize_dwarf2_read (void)
22639 struct cmd_list_element
*c
;
22641 dwarf2_objfile_data_key
22642 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
22644 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
22645 Set DWARF 2 specific variables.\n\
22646 Configure DWARF 2 variables such as the cache size"),
22647 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
22648 0/*allow-unknown*/, &maintenance_set_cmdlist
);
22650 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
22651 Show DWARF 2 specific variables\n\
22652 Show DWARF 2 variables such as the cache size"),
22653 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
22654 0/*allow-unknown*/, &maintenance_show_cmdlist
);
22656 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
22657 &dwarf2_max_cache_age
, _("\
22658 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
22659 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
22660 A higher limit means that cached compilation units will be stored\n\
22661 in memory longer, and more total memory will be used. Zero disables\n\
22662 caching, which can slow down startup."),
22664 show_dwarf2_max_cache_age
,
22665 &set_dwarf2_cmdlist
,
22666 &show_dwarf2_cmdlist
);
22668 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
22669 &dwarf2_always_disassemble
, _("\
22670 Set whether `info address' always disassembles DWARF expressions."), _("\
22671 Show whether `info address' always disassembles DWARF expressions."), _("\
22672 When enabled, DWARF expressions are always printed in an assembly-like\n\
22673 syntax. When disabled, expressions will be printed in a more\n\
22674 conversational style, when possible."),
22676 show_dwarf2_always_disassemble
,
22677 &set_dwarf2_cmdlist
,
22678 &show_dwarf2_cmdlist
);
22680 add_setshow_zuinteger_cmd ("dwarf2-read", no_class
, &dwarf2_read_debug
, _("\
22681 Set debugging of the dwarf2 reader."), _("\
22682 Show debugging of the dwarf2 reader."), _("\
22683 When enabled (non-zero), debugging messages are printed during dwarf2\n\
22684 reading and symtab expansion. A value of 1 (one) provides basic\n\
22685 information. A value greater than 1 provides more verbose information."),
22688 &setdebuglist
, &showdebuglist
);
22690 add_setshow_zuinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
22691 Set debugging of the dwarf2 DIE reader."), _("\
22692 Show debugging of the dwarf2 DIE reader."), _("\
22693 When enabled (non-zero), DIEs are dumped after they are read in.\n\
22694 The value is the maximum depth to print."),
22697 &setdebuglist
, &showdebuglist
);
22699 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
22700 Set cross-checking of \"physname\" code against demangler."), _("\
22701 Show cross-checking of \"physname\" code against demangler."), _("\
22702 When enabled, GDB's internal \"physname\" code is checked against\n\
22704 NULL
, show_check_physname
,
22705 &setdebuglist
, &showdebuglist
);
22707 add_setshow_boolean_cmd ("use-deprecated-index-sections",
22708 no_class
, &use_deprecated_index_sections
, _("\
22709 Set whether to use deprecated gdb_index sections."), _("\
22710 Show whether to use deprecated gdb_index sections."), _("\
22711 When enabled, deprecated .gdb_index sections are used anyway.\n\
22712 Normally they are ignored either because of a missing feature or\n\
22713 performance issue.\n\
22714 Warning: This option must be enabled before gdb reads the file."),
22717 &setlist
, &showlist
);
22719 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
22721 Save a gdb-index file.\n\
22722 Usage: save gdb-index DIRECTORY"),
22724 set_cmd_completer (c
, filename_completer
);
22726 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
22727 &dwarf2_locexpr_funcs
);
22728 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
22729 &dwarf2_loclist_funcs
);
22731 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
22732 &dwarf2_block_frame_base_locexpr_funcs
);
22733 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
22734 &dwarf2_block_frame_base_loclist_funcs
);