1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994-2013 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"
73 #include "gdb_string.h"
74 #include "gdb_assert.h"
75 #include <sys/types.h>
77 typedef struct symbol
*symbolp
;
80 /* When non-zero, print basic high level tracing messages.
81 This is in contrast to the low level DIE reading of dwarf2_die_debug. */
82 static int dwarf2_read_debug
= 0;
84 /* When non-zero, dump DIEs after they are read in. */
85 static unsigned int dwarf2_die_debug
= 0;
87 /* When non-zero, cross-check physname against demangler. */
88 static int check_physname
= 0;
90 /* When non-zero, do not reject deprecated .gdb_index sections. */
91 static int use_deprecated_index_sections
= 0;
93 static const struct objfile_data
*dwarf2_objfile_data_key
;
95 struct dwarf2_section_info
100 /* True if we have tried to read this section. */
104 typedef struct dwarf2_section_info dwarf2_section_info_def
;
105 DEF_VEC_O (dwarf2_section_info_def
);
107 /* All offsets in the index are of this type. It must be
108 architecture-independent. */
109 typedef uint32_t offset_type
;
111 DEF_VEC_I (offset_type
);
113 /* Ensure only legit values are used. */
114 #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \
116 gdb_assert ((unsigned int) (value) <= 1); \
117 GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \
120 /* Ensure only legit values are used. */
121 #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \
123 gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \
124 && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \
125 GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \
128 /* Ensure we don't use more than the alloted nuber of bits for the CU. */
129 #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \
131 gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \
132 GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \
135 /* A description of the mapped index. The file format is described in
136 a comment by the code that writes the index. */
139 /* Index data format version. */
142 /* The total length of the buffer. */
145 /* A pointer to the address table data. */
146 const gdb_byte
*address_table
;
148 /* Size of the address table data in bytes. */
149 offset_type address_table_size
;
151 /* The symbol table, implemented as a hash table. */
152 const offset_type
*symbol_table
;
154 /* Size in slots, each slot is 2 offset_types. */
155 offset_type symbol_table_slots
;
157 /* A pointer to the constant pool. */
158 const char *constant_pool
;
161 typedef struct dwarf2_per_cu_data
*dwarf2_per_cu_ptr
;
162 DEF_VEC_P (dwarf2_per_cu_ptr
);
164 /* Collection of data recorded per objfile.
165 This hangs off of dwarf2_objfile_data_key. */
167 struct dwarf2_per_objfile
169 struct dwarf2_section_info info
;
170 struct dwarf2_section_info abbrev
;
171 struct dwarf2_section_info line
;
172 struct dwarf2_section_info loc
;
173 struct dwarf2_section_info macinfo
;
174 struct dwarf2_section_info macro
;
175 struct dwarf2_section_info str
;
176 struct dwarf2_section_info ranges
;
177 struct dwarf2_section_info addr
;
178 struct dwarf2_section_info frame
;
179 struct dwarf2_section_info eh_frame
;
180 struct dwarf2_section_info gdb_index
;
182 VEC (dwarf2_section_info_def
) *types
;
185 struct objfile
*objfile
;
187 /* Table of all the compilation units. This is used to locate
188 the target compilation unit of a particular reference. */
189 struct dwarf2_per_cu_data
**all_comp_units
;
191 /* The number of compilation units in ALL_COMP_UNITS. */
194 /* The number of .debug_types-related CUs. */
197 /* The .debug_types-related CUs (TUs). */
198 struct signatured_type
**all_type_units
;
200 /* The number of entries in all_type_unit_groups. */
201 int n_type_unit_groups
;
203 /* Table of type unit groups.
204 This exists to make it easy to iterate over all CUs and TU groups. */
205 struct type_unit_group
**all_type_unit_groups
;
207 /* Table of struct type_unit_group objects.
208 The hash key is the DW_AT_stmt_list value. */
209 htab_t type_unit_groups
;
211 /* A table mapping .debug_types signatures to its signatured_type entry.
212 This is NULL if the .debug_types section hasn't been read in yet. */
213 htab_t signatured_types
;
215 /* Type unit statistics, to see how well the scaling improvements
219 int nr_uniq_abbrev_tables
;
221 int nr_symtab_sharers
;
222 int nr_stmt_less_type_units
;
225 /* A chain of compilation units that are currently read in, so that
226 they can be freed later. */
227 struct dwarf2_per_cu_data
*read_in_chain
;
229 /* A table mapping DW_AT_dwo_name values to struct dwo_file objects.
230 This is NULL if the table hasn't been allocated yet. */
233 /* Non-zero if we've check for whether there is a DWP file. */
236 /* The DWP file if there is one, or NULL. */
237 struct dwp_file
*dwp_file
;
239 /* The shared '.dwz' file, if one exists. This is used when the
240 original data was compressed using 'dwz -m'. */
241 struct dwz_file
*dwz_file
;
243 /* A flag indicating wether this objfile has a section loaded at a
245 int has_section_at_zero
;
247 /* True if we are using the mapped index,
248 or we are faking it for OBJF_READNOW's sake. */
249 unsigned char using_index
;
251 /* The mapped index, or NULL if .gdb_index is missing or not being used. */
252 struct mapped_index
*index_table
;
254 /* When using index_table, this keeps track of all quick_file_names entries.
255 TUs typically share line table entries with a CU, so we maintain a
256 separate table of all line table entries to support the sharing.
257 Note that while there can be way more TUs than CUs, we've already
258 sorted all the TUs into "type unit groups", grouped by their
259 DW_AT_stmt_list value. Therefore the only sharing done here is with a
260 CU and its associated TU group if there is one. */
261 htab_t quick_file_names_table
;
263 /* Set during partial symbol reading, to prevent queueing of full
265 int reading_partial_symbols
;
267 /* Table mapping type DIEs to their struct type *.
268 This is NULL if not allocated yet.
269 The mapping is done via (CU/TU signature + DIE offset) -> type. */
270 htab_t die_type_hash
;
272 /* The CUs we recently read. */
273 VEC (dwarf2_per_cu_ptr
) *just_read_cus
;
276 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
278 /* Default names of the debugging sections. */
280 /* Note that if the debugging section has been compressed, it might
281 have a name like .zdebug_info. */
283 static const struct dwarf2_debug_sections dwarf2_elf_names
=
285 { ".debug_info", ".zdebug_info" },
286 { ".debug_abbrev", ".zdebug_abbrev" },
287 { ".debug_line", ".zdebug_line" },
288 { ".debug_loc", ".zdebug_loc" },
289 { ".debug_macinfo", ".zdebug_macinfo" },
290 { ".debug_macro", ".zdebug_macro" },
291 { ".debug_str", ".zdebug_str" },
292 { ".debug_ranges", ".zdebug_ranges" },
293 { ".debug_types", ".zdebug_types" },
294 { ".debug_addr", ".zdebug_addr" },
295 { ".debug_frame", ".zdebug_frame" },
296 { ".eh_frame", NULL
},
297 { ".gdb_index", ".zgdb_index" },
301 /* List of DWO/DWP sections. */
303 static const struct dwop_section_names
305 struct dwarf2_section_names abbrev_dwo
;
306 struct dwarf2_section_names info_dwo
;
307 struct dwarf2_section_names line_dwo
;
308 struct dwarf2_section_names loc_dwo
;
309 struct dwarf2_section_names macinfo_dwo
;
310 struct dwarf2_section_names macro_dwo
;
311 struct dwarf2_section_names str_dwo
;
312 struct dwarf2_section_names str_offsets_dwo
;
313 struct dwarf2_section_names types_dwo
;
314 struct dwarf2_section_names cu_index
;
315 struct dwarf2_section_names tu_index
;
319 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
320 { ".debug_info.dwo", ".zdebug_info.dwo" },
321 { ".debug_line.dwo", ".zdebug_line.dwo" },
322 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
323 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
324 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
325 { ".debug_str.dwo", ".zdebug_str.dwo" },
326 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
327 { ".debug_types.dwo", ".zdebug_types.dwo" },
328 { ".debug_cu_index", ".zdebug_cu_index" },
329 { ".debug_tu_index", ".zdebug_tu_index" },
332 /* local data types */
334 /* The data in a compilation unit header, after target2host
335 translation, looks like this. */
336 struct comp_unit_head
340 unsigned char addr_size
;
341 unsigned char signed_addr_p
;
342 sect_offset abbrev_offset
;
344 /* Size of file offsets; either 4 or 8. */
345 unsigned int offset_size
;
347 /* Size of the length field; either 4 or 12. */
348 unsigned int initial_length_size
;
350 /* Offset to the first byte of this compilation unit header in the
351 .debug_info section, for resolving relative reference dies. */
354 /* Offset to first die in this cu from the start of the cu.
355 This will be the first byte following the compilation unit header. */
356 cu_offset first_die_offset
;
359 /* Type used for delaying computation of method physnames.
360 See comments for compute_delayed_physnames. */
361 struct delayed_method_info
363 /* The type to which the method is attached, i.e., its parent class. */
366 /* The index of the method in the type's function fieldlists. */
369 /* The index of the method in the fieldlist. */
372 /* The name of the DIE. */
375 /* The DIE associated with this method. */
376 struct die_info
*die
;
379 typedef struct delayed_method_info delayed_method_info
;
380 DEF_VEC_O (delayed_method_info
);
382 /* Internal state when decoding a particular compilation unit. */
385 /* The objfile containing this compilation unit. */
386 struct objfile
*objfile
;
388 /* The header of the compilation unit. */
389 struct comp_unit_head header
;
391 /* Base address of this compilation unit. */
392 CORE_ADDR base_address
;
394 /* Non-zero if base_address has been set. */
397 /* The language we are debugging. */
398 enum language language
;
399 const struct language_defn
*language_defn
;
401 const char *producer
;
403 /* The generic symbol table building routines have separate lists for
404 file scope symbols and all all other scopes (local scopes). So
405 we need to select the right one to pass to add_symbol_to_list().
406 We do it by keeping a pointer to the correct list in list_in_scope.
408 FIXME: The original dwarf code just treated the file scope as the
409 first local scope, and all other local scopes as nested local
410 scopes, and worked fine. Check to see if we really need to
411 distinguish these in buildsym.c. */
412 struct pending
**list_in_scope
;
414 /* The abbrev table for this CU.
415 Normally this points to the abbrev table in the objfile.
416 But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */
417 struct abbrev_table
*abbrev_table
;
419 /* Hash table holding all the loaded partial DIEs
420 with partial_die->offset.SECT_OFF as hash. */
423 /* Storage for things with the same lifetime as this read-in compilation
424 unit, including partial DIEs. */
425 struct obstack comp_unit_obstack
;
427 /* When multiple dwarf2_cu structures are living in memory, this field
428 chains them all together, so that they can be released efficiently.
429 We will probably also want a generation counter so that most-recently-used
430 compilation units are cached... */
431 struct dwarf2_per_cu_data
*read_in_chain
;
433 /* Backchain to our per_cu entry if the tree has been built. */
434 struct dwarf2_per_cu_data
*per_cu
;
436 /* How many compilation units ago was this CU last referenced? */
439 /* A hash table of DIE cu_offset for following references with
440 die_info->offset.sect_off as hash. */
443 /* Full DIEs if read in. */
444 struct die_info
*dies
;
446 /* A set of pointers to dwarf2_per_cu_data objects for compilation
447 units referenced by this one. Only set during full symbol processing;
448 partial symbol tables do not have dependencies. */
451 /* Header data from the line table, during full symbol processing. */
452 struct line_header
*line_header
;
454 /* A list of methods which need to have physnames computed
455 after all type information has been read. */
456 VEC (delayed_method_info
) *method_list
;
458 /* To be copied to symtab->call_site_htab. */
459 htab_t call_site_htab
;
461 /* Non-NULL if this CU came from a DWO file.
462 There is an invariant here that is important to remember:
463 Except for attributes copied from the top level DIE in the "main"
464 (or "stub") file in preparation for reading the DWO file
465 (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
466 Either there isn't a DWO file (in which case this is NULL and the point
467 is moot), or there is and either we're not going to read it (in which
468 case this is NULL) or there is and we are reading it (in which case this
470 struct dwo_unit
*dwo_unit
;
472 /* The DW_AT_addr_base attribute if present, zero otherwise
473 (zero is a valid value though).
474 Note this value comes from the stub CU/TU's DIE. */
477 /* The DW_AT_ranges_base attribute if present, zero otherwise
478 (zero is a valid value though).
479 Note this value comes from the stub CU/TU's DIE.
480 Also note that the value is zero in the non-DWO case so this value can
481 be used without needing to know whether DWO files are in use or not.
482 N.B. This does not apply to DW_AT_ranges appearing in
483 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
484 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
485 DW_AT_ranges_base *would* have to be applied, and we'd have to care
486 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
487 ULONGEST ranges_base
;
489 /* Mark used when releasing cached dies. */
490 unsigned int mark
: 1;
492 /* This CU references .debug_loc. See the symtab->locations_valid field.
493 This test is imperfect as there may exist optimized debug code not using
494 any location list and still facing inlining issues if handled as
495 unoptimized code. For a future better test see GCC PR other/32998. */
496 unsigned int has_loclist
: 1;
498 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set
499 if all the producer_is_* fields are valid. This information is cached
500 because profiling CU expansion showed excessive time spent in
501 producer_is_gxx_lt_4_6. */
502 unsigned int checked_producer
: 1;
503 unsigned int producer_is_gxx_lt_4_6
: 1;
504 unsigned int producer_is_gcc_lt_4_3
: 1;
505 unsigned int producer_is_icc
: 1;
507 /* When set, the file that we're processing is known to have
508 debugging info for C++ namespaces. GCC 3.3.x did not produce
509 this information, but later versions do. */
511 unsigned int processing_has_namespace_info
: 1;
514 /* Persistent data held for a compilation unit, even when not
515 processing it. We put a pointer to this structure in the
516 read_symtab_private field of the psymtab. */
518 struct dwarf2_per_cu_data
520 /* The start offset and length of this compilation unit.
521 NOTE: Unlike comp_unit_head.length, this length includes
523 If the DIE refers to a DWO file, this is always of the original die,
528 /* Flag indicating this compilation unit will be read in before
529 any of the current compilation units are processed. */
530 unsigned int queued
: 1;
532 /* This flag will be set when reading partial DIEs if we need to load
533 absolutely all DIEs for this compilation unit, instead of just the ones
534 we think are interesting. It gets set if we look for a DIE in the
535 hash table and don't find it. */
536 unsigned int load_all_dies
: 1;
538 /* Non-zero if this CU is from .debug_types. */
539 unsigned int is_debug_types
: 1;
541 /* Non-zero if this CU is from the .dwz file. */
542 unsigned int is_dwz
: 1;
544 /* The section this CU/TU lives in.
545 If the DIE refers to a DWO file, this is always the original die,
547 struct dwarf2_section_info
*info_or_types_section
;
549 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
550 of the CU cache it gets reset to NULL again. */
551 struct dwarf2_cu
*cu
;
553 /* The corresponding objfile.
554 Normally we can get the objfile from dwarf2_per_objfile.
555 However we can enter this file with just a "per_cu" handle. */
556 struct objfile
*objfile
;
558 /* When using partial symbol tables, the 'psymtab' field is active.
559 Otherwise the 'quick' field is active. */
562 /* The partial symbol table associated with this compilation unit,
563 or NULL for unread partial units. */
564 struct partial_symtab
*psymtab
;
566 /* Data needed by the "quick" functions. */
567 struct dwarf2_per_cu_quick_data
*quick
;
570 /* The CUs we import using DW_TAG_imported_unit. This is filled in
571 while reading psymtabs, used to compute the psymtab dependencies,
572 and then cleared. Then it is filled in again while reading full
573 symbols, and only deleted when the objfile is destroyed.
575 This is also used to work around a difference between the way gold
576 generates .gdb_index version <=7 and the way gdb does. Arguably this
577 is a gold bug. For symbols coming from TUs, gold records in the index
578 the CU that includes the TU instead of the TU itself. This breaks
579 dw2_lookup_symbol: It assumes that if the index says symbol X lives
580 in CU/TU Y, then one need only expand Y and a subsequent lookup in Y
581 will find X. Alas TUs live in their own symtab, so after expanding CU Y
582 we need to look in TU Z to find X. Fortunately, this is akin to
583 DW_TAG_imported_unit, so we just use the same mechanism: For
584 .gdb_index version <=7 this also records the TUs that the CU referred
585 to. Concurrently with this change gdb was modified to emit version 8
586 indices so we only pay a price for gold generated indices. */
587 VEC (dwarf2_per_cu_ptr
) *imported_symtabs
;
589 /* Type units are grouped by their DW_AT_stmt_list entry so that they
590 can share them. If this is a TU, this points to the containing
592 struct type_unit_group
*type_unit_group
;
595 /* Entry in the signatured_types hash table. */
597 struct signatured_type
599 /* The "per_cu" object of this type.
600 N.B.: This is the first member so that it's easy to convert pointers
602 struct dwarf2_per_cu_data per_cu
;
604 /* The type's signature. */
607 /* Offset in the TU of the type's DIE, as read from the TU header.
608 If the definition lives in a DWO file, this value is unusable. */
609 cu_offset type_offset_in_tu
;
611 /* Offset in the section of the type's DIE.
612 If the definition lives in a DWO file, this is the offset in the
613 .debug_types.dwo section.
614 The value is zero until the actual value is known.
615 Zero is otherwise not a valid section offset. */
616 sect_offset type_offset_in_section
;
619 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
620 This includes type_unit_group and quick_file_names. */
622 struct stmt_list_hash
624 /* The DWO unit this table is from or NULL if there is none. */
625 struct dwo_unit
*dwo_unit
;
627 /* Offset in .debug_line or .debug_line.dwo. */
628 sect_offset line_offset
;
631 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
632 an object of this type. */
634 struct type_unit_group
636 /* dwarf2read.c's main "handle" on the symtab.
637 To simplify things we create an artificial CU that "includes" all the
638 type units using this stmt_list so that the rest of the code still has
639 a "per_cu" handle on the symtab.
640 This PER_CU is recognized by having no section. */
641 #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->info_or_types_section == NULL)
642 struct dwarf2_per_cu_data per_cu
;
646 /* The TUs that share this DW_AT_stmt_list entry.
647 This is added to while parsing type units to build partial symtabs,
648 and is deleted afterwards and not used again. */
649 VEC (dwarf2_per_cu_ptr
) *tus
;
651 /* When reading the line table in "quick" functions, we need a real TU.
652 Any will do, we know they all share the same DW_AT_stmt_list entry.
653 For simplicity's sake, we pick the first one. */
654 struct dwarf2_per_cu_data
*first_tu
;
657 /* The primary symtab.
658 Type units in a group needn't all be defined in the same source file,
659 so we create an essentially anonymous symtab as the primary symtab. */
660 struct symtab
*primary_symtab
;
662 /* The data used to construct the hash key. */
663 struct stmt_list_hash hash
;
665 /* The number of symtabs from the line header.
666 The value here must match line_header.num_file_names. */
667 unsigned int num_symtabs
;
669 /* The symbol tables for this TU (obtained from the files listed in
671 WARNING: The order of entries here must match the order of entries
672 in the line header. After the first TU using this type_unit_group, the
673 line header for the subsequent TUs is recreated from this. This is done
674 because we need to use the same symtabs for each TU using the same
675 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
676 there's no guarantee the line header doesn't have duplicate entries. */
677 struct symtab
**symtabs
;
680 /* These sections are what may appear in a DWO file. */
684 struct dwarf2_section_info abbrev
;
685 struct dwarf2_section_info line
;
686 struct dwarf2_section_info loc
;
687 struct dwarf2_section_info macinfo
;
688 struct dwarf2_section_info macro
;
689 struct dwarf2_section_info str
;
690 struct dwarf2_section_info str_offsets
;
691 /* In the case of a virtual DWO file, these two are unused. */
692 struct dwarf2_section_info info
;
693 VEC (dwarf2_section_info_def
) *types
;
696 /* Common bits of DWO CUs/TUs. */
700 /* Backlink to the containing struct dwo_file. */
701 struct dwo_file
*dwo_file
;
703 /* The "id" that distinguishes this CU/TU.
704 .debug_info calls this "dwo_id", .debug_types calls this "signature".
705 Since signatures came first, we stick with it for consistency. */
708 /* The section this CU/TU lives in, in the DWO file. */
709 struct dwarf2_section_info
*info_or_types_section
;
711 /* Same as dwarf2_per_cu_data:{offset,length} but for the DWO section. */
715 /* For types, offset in the type's DIE of the type defined by this TU. */
716 cu_offset type_offset_in_tu
;
719 /* Data for one DWO file.
720 This includes virtual DWO files that have been packaged into a
725 /* The DW_AT_GNU_dwo_name attribute. This is the hash key.
726 For virtual DWO files the name is constructed from the section offsets
727 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
728 from related CU+TUs. */
731 /* The bfd, when the file is open. Otherwise this is NULL.
732 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
735 /* Section info for this file. */
736 struct dwo_sections sections
;
738 /* Table of CUs in the file.
739 Each element is a struct dwo_unit. */
742 /* Table of TUs in the file.
743 Each element is a struct dwo_unit. */
747 /* These sections are what may appear in a DWP file. */
751 struct dwarf2_section_info str
;
752 struct dwarf2_section_info cu_index
;
753 struct dwarf2_section_info tu_index
;
754 /* The .debug_info.dwo, .debug_types.dwo, and other sections are referenced
755 by section number. We don't need to record them here. */
758 /* These sections are what may appear in a virtual DWO file. */
760 struct virtual_dwo_sections
762 struct dwarf2_section_info abbrev
;
763 struct dwarf2_section_info line
;
764 struct dwarf2_section_info loc
;
765 struct dwarf2_section_info macinfo
;
766 struct dwarf2_section_info macro
;
767 struct dwarf2_section_info str_offsets
;
768 /* Each DWP hash table entry records one CU or one TU.
769 That is recorded here, and copied to dwo_unit.info_or_types_section. */
770 struct dwarf2_section_info info_or_types
;
773 /* Contents of DWP hash tables. */
775 struct dwp_hash_table
777 uint32_t nr_units
, nr_slots
;
778 const gdb_byte
*hash_table
, *unit_table
, *section_pool
;
781 /* Data for one DWP file. */
785 /* Name of the file. */
788 /* The bfd, when the file is open. Otherwise this is NULL. */
791 /* Section info for this file. */
792 struct dwp_sections sections
;
794 /* Table of CUs in the file. */
795 const struct dwp_hash_table
*cus
;
797 /* Table of TUs in the file. */
798 const struct dwp_hash_table
*tus
;
800 /* Table of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
803 /* Table to map ELF section numbers to their sections. */
804 unsigned int num_sections
;
805 asection
**elf_sections
;
808 /* This represents a '.dwz' file. */
812 /* A dwz file can only contain a few sections. */
813 struct dwarf2_section_info abbrev
;
814 struct dwarf2_section_info info
;
815 struct dwarf2_section_info str
;
816 struct dwarf2_section_info line
;
817 struct dwarf2_section_info macro
;
818 struct dwarf2_section_info gdb_index
;
824 /* Struct used to pass misc. parameters to read_die_and_children, et
825 al. which are used for both .debug_info and .debug_types dies.
826 All parameters here are unchanging for the life of the call. This
827 struct exists to abstract away the constant parameters of die reading. */
829 struct die_reader_specs
831 /* die_section->asection->owner. */
834 /* The CU of the DIE we are parsing. */
835 struct dwarf2_cu
*cu
;
837 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
838 struct dwo_file
*dwo_file
;
840 /* The section the die comes from.
841 This is either .debug_info or .debug_types, or the .dwo variants. */
842 struct dwarf2_section_info
*die_section
;
844 /* die_section->buffer. */
847 /* The end of the buffer. */
848 const gdb_byte
*buffer_end
;
851 /* Type of function passed to init_cutu_and_read_dies, et.al. */
852 typedef void (die_reader_func_ftype
) (const struct die_reader_specs
*reader
,
854 struct die_info
*comp_unit_die
,
858 /* The line number information for a compilation unit (found in the
859 .debug_line section) begins with a "statement program header",
860 which contains the following information. */
863 unsigned int total_length
;
864 unsigned short version
;
865 unsigned int header_length
;
866 unsigned char minimum_instruction_length
;
867 unsigned char maximum_ops_per_instruction
;
868 unsigned char default_is_stmt
;
870 unsigned char line_range
;
871 unsigned char opcode_base
;
873 /* standard_opcode_lengths[i] is the number of operands for the
874 standard opcode whose value is i. This means that
875 standard_opcode_lengths[0] is unused, and the last meaningful
876 element is standard_opcode_lengths[opcode_base - 1]. */
877 unsigned char *standard_opcode_lengths
;
879 /* The include_directories table. NOTE! These strings are not
880 allocated with xmalloc; instead, they are pointers into
881 debug_line_buffer. If you try to free them, `free' will get
883 unsigned int num_include_dirs
, include_dirs_size
;
886 /* The file_names table. NOTE! These strings are not allocated
887 with xmalloc; instead, they are pointers into debug_line_buffer.
888 Don't try to free them directly. */
889 unsigned int num_file_names
, file_names_size
;
893 unsigned int dir_index
;
894 unsigned int mod_time
;
896 int included_p
; /* Non-zero if referenced by the Line Number Program. */
897 struct symtab
*symtab
; /* The associated symbol table, if any. */
900 /* The start and end of the statement program following this
901 header. These point into dwarf2_per_objfile->line_buffer. */
902 gdb_byte
*statement_program_start
, *statement_program_end
;
905 /* When we construct a partial symbol table entry we only
906 need this much information. */
907 struct partial_die_info
909 /* Offset of this DIE. */
912 /* DWARF-2 tag for this DIE. */
913 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
915 /* Assorted flags describing the data found in this DIE. */
916 unsigned int has_children
: 1;
917 unsigned int is_external
: 1;
918 unsigned int is_declaration
: 1;
919 unsigned int has_type
: 1;
920 unsigned int has_specification
: 1;
921 unsigned int has_pc_info
: 1;
922 unsigned int may_be_inlined
: 1;
924 /* Flag set if the SCOPE field of this structure has been
926 unsigned int scope_set
: 1;
928 /* Flag set if the DIE has a byte_size attribute. */
929 unsigned int has_byte_size
: 1;
931 /* Flag set if any of the DIE's children are template arguments. */
932 unsigned int has_template_arguments
: 1;
934 /* Flag set if fixup_partial_die has been called on this die. */
935 unsigned int fixup_called
: 1;
937 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
938 unsigned int is_dwz
: 1;
940 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
941 unsigned int spec_is_dwz
: 1;
943 /* The name of this DIE. Normally the value of DW_AT_name, but
944 sometimes a default name for unnamed DIEs. */
947 /* The linkage name, if present. */
948 const char *linkage_name
;
950 /* The scope to prepend to our children. This is generally
951 allocated on the comp_unit_obstack, so will disappear
952 when this compilation unit leaves the cache. */
955 /* Some data associated with the partial DIE. The tag determines
956 which field is live. */
959 /* The location description associated with this DIE, if any. */
960 struct dwarf_block
*locdesc
;
961 /* The offset of an import, for DW_TAG_imported_unit. */
965 /* If HAS_PC_INFO, the PC range associated with this DIE. */
969 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
970 DW_AT_sibling, if any. */
971 /* NOTE: This member isn't strictly necessary, read_partial_die could
972 return DW_AT_sibling values to its caller load_partial_dies. */
975 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
976 DW_AT_specification (or DW_AT_abstract_origin or
978 sect_offset spec_offset
;
980 /* Pointers to this DIE's parent, first child, and next sibling,
982 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
985 /* This data structure holds the information of an abbrev. */
988 unsigned int number
; /* number identifying abbrev */
989 enum dwarf_tag tag
; /* dwarf tag */
990 unsigned short has_children
; /* boolean */
991 unsigned short num_attrs
; /* number of attributes */
992 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
993 struct abbrev_info
*next
; /* next in chain */
998 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
999 ENUM_BITFIELD(dwarf_form
) form
: 16;
1002 /* Size of abbrev_table.abbrev_hash_table. */
1003 #define ABBREV_HASH_SIZE 121
1005 /* Top level data structure to contain an abbreviation table. */
1009 /* Where the abbrev table came from.
1010 This is used as a sanity check when the table is used. */
1013 /* Storage for the abbrev table. */
1014 struct obstack abbrev_obstack
;
1016 /* Hash table of abbrevs.
1017 This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
1018 It could be statically allocated, but the previous code didn't so we
1020 struct abbrev_info
**abbrevs
;
1023 /* Attributes have a name and a value. */
1026 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1027 ENUM_BITFIELD(dwarf_form
) form
: 15;
1029 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
1030 field should be in u.str (existing only for DW_STRING) but it is kept
1031 here for better struct attribute alignment. */
1032 unsigned int string_is_canonical
: 1;
1037 struct dwarf_block
*blk
;
1041 struct signatured_type
*signatured_type
;
1046 /* This data structure holds a complete die structure. */
1049 /* DWARF-2 tag for this DIE. */
1050 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1052 /* Number of attributes */
1053 unsigned char num_attrs
;
1055 /* True if we're presently building the full type name for the
1056 type derived from this DIE. */
1057 unsigned char building_fullname
: 1;
1060 unsigned int abbrev
;
1062 /* Offset in .debug_info or .debug_types section. */
1065 /* The dies in a compilation unit form an n-ary tree. PARENT
1066 points to this die's parent; CHILD points to the first child of
1067 this node; and all the children of a given node are chained
1068 together via their SIBLING fields. */
1069 struct die_info
*child
; /* Its first child, if any. */
1070 struct die_info
*sibling
; /* Its next sibling, if any. */
1071 struct die_info
*parent
; /* Its parent, if any. */
1073 /* An array of attributes, with NUM_ATTRS elements. There may be
1074 zero, but it's not common and zero-sized arrays are not
1075 sufficiently portable C. */
1076 struct attribute attrs
[1];
1079 /* Get at parts of an attribute structure. */
1081 #define DW_STRING(attr) ((attr)->u.str)
1082 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
1083 #define DW_UNSND(attr) ((attr)->u.unsnd)
1084 #define DW_BLOCK(attr) ((attr)->u.blk)
1085 #define DW_SND(attr) ((attr)->u.snd)
1086 #define DW_ADDR(attr) ((attr)->u.addr)
1087 #define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
1089 /* Blocks are a bunch of untyped bytes. */
1094 /* Valid only if SIZE is not zero. */
1098 #ifndef ATTR_ALLOC_CHUNK
1099 #define ATTR_ALLOC_CHUNK 4
1102 /* Allocate fields for structs, unions and enums in this size. */
1103 #ifndef DW_FIELD_ALLOC_CHUNK
1104 #define DW_FIELD_ALLOC_CHUNK 4
1107 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1108 but this would require a corresponding change in unpack_field_as_long
1110 static int bits_per_byte
= 8;
1112 /* The routines that read and process dies for a C struct or C++ class
1113 pass lists of data member fields and lists of member function fields
1114 in an instance of a field_info structure, as defined below. */
1117 /* List of data member and baseclasses fields. */
1120 struct nextfield
*next
;
1125 *fields
, *baseclasses
;
1127 /* Number of fields (including baseclasses). */
1130 /* Number of baseclasses. */
1133 /* Set if the accesibility of one of the fields is not public. */
1134 int non_public_fields
;
1136 /* Member function fields array, entries are allocated in the order they
1137 are encountered in the object file. */
1140 struct nextfnfield
*next
;
1141 struct fn_field fnfield
;
1145 /* Member function fieldlist array, contains name of possibly overloaded
1146 member function, number of overloaded member functions and a pointer
1147 to the head of the member function field chain. */
1152 struct nextfnfield
*head
;
1156 /* Number of entries in the fnfieldlists array. */
1159 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1160 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1161 struct typedef_field_list
1163 struct typedef_field field
;
1164 struct typedef_field_list
*next
;
1166 *typedef_field_list
;
1167 unsigned typedef_field_list_count
;
1170 /* One item on the queue of compilation units to read in full symbols
1172 struct dwarf2_queue_item
1174 struct dwarf2_per_cu_data
*per_cu
;
1175 enum language pretend_language
;
1176 struct dwarf2_queue_item
*next
;
1179 /* The current queue. */
1180 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
1182 /* Loaded secondary compilation units are kept in memory until they
1183 have not been referenced for the processing of this many
1184 compilation units. Set this to zero to disable caching. Cache
1185 sizes of up to at least twenty will improve startup time for
1186 typical inter-CU-reference binaries, at an obvious memory cost. */
1187 static int dwarf2_max_cache_age
= 5;
1189 show_dwarf2_max_cache_age (struct ui_file
*file
, int from_tty
,
1190 struct cmd_list_element
*c
, const char *value
)
1192 fprintf_filtered (file
, _("The upper bound on the age of cached "
1193 "dwarf2 compilation units is %s.\n"),
1198 /* Various complaints about symbol reading that don't abort the process. */
1201 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
1203 complaint (&symfile_complaints
,
1204 _("statement list doesn't fit in .debug_line section"));
1208 dwarf2_debug_line_missing_file_complaint (void)
1210 complaint (&symfile_complaints
,
1211 _(".debug_line section has line data without a file"));
1215 dwarf2_debug_line_missing_end_sequence_complaint (void)
1217 complaint (&symfile_complaints
,
1218 _(".debug_line section has line "
1219 "program sequence without an end"));
1223 dwarf2_complex_location_expr_complaint (void)
1225 complaint (&symfile_complaints
, _("location expression too complex"));
1229 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
1232 complaint (&symfile_complaints
,
1233 _("const value length mismatch for '%s', got %d, expected %d"),
1238 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
1240 complaint (&symfile_complaints
,
1241 _("debug info runs off end of %s section"
1243 section
->asection
->name
,
1244 bfd_get_filename (section
->asection
->owner
));
1248 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
1250 complaint (&symfile_complaints
,
1251 _("macro debug info contains a "
1252 "malformed macro definition:\n`%s'"),
1257 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
1259 complaint (&symfile_complaints
,
1260 _("invalid attribute class or form for '%s' in '%s'"),
1264 /* local function prototypes */
1266 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
1268 static void dwarf2_create_include_psymtab (char *, struct partial_symtab
*,
1271 static void dwarf2_find_base_address (struct die_info
*die
,
1272 struct dwarf2_cu
*cu
);
1274 static void dwarf2_build_psymtabs_hard (struct objfile
*);
1276 static void scan_partial_symbols (struct partial_die_info
*,
1277 CORE_ADDR
*, CORE_ADDR
*,
1278 int, struct dwarf2_cu
*);
1280 static void add_partial_symbol (struct partial_die_info
*,
1281 struct dwarf2_cu
*);
1283 static void add_partial_namespace (struct partial_die_info
*pdi
,
1284 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1285 int need_pc
, struct dwarf2_cu
*cu
);
1287 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1288 CORE_ADDR
*highpc
, int need_pc
,
1289 struct dwarf2_cu
*cu
);
1291 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1292 struct dwarf2_cu
*cu
);
1294 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1295 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1296 int need_pc
, struct dwarf2_cu
*cu
);
1298 static void dwarf2_read_symtab (struct partial_symtab
*,
1301 static void psymtab_to_symtab_1 (struct partial_symtab
*);
1303 static struct abbrev_info
*abbrev_table_lookup_abbrev
1304 (const struct abbrev_table
*, unsigned int);
1306 static struct abbrev_table
*abbrev_table_read_table
1307 (struct dwarf2_section_info
*, sect_offset
);
1309 static void abbrev_table_free (struct abbrev_table
*);
1311 static void abbrev_table_free_cleanup (void *);
1313 static void dwarf2_read_abbrevs (struct dwarf2_cu
*,
1314 struct dwarf2_section_info
*);
1316 static void dwarf2_free_abbrev_table (void *);
1318 static unsigned int peek_abbrev_code (bfd
*, gdb_byte
*);
1320 static struct partial_die_info
*load_partial_dies
1321 (const struct die_reader_specs
*, gdb_byte
*, int);
1323 static gdb_byte
*read_partial_die (const struct die_reader_specs
*,
1324 struct partial_die_info
*,
1325 struct abbrev_info
*,
1329 static struct partial_die_info
*find_partial_die (sect_offset
, int,
1330 struct dwarf2_cu
*);
1332 static void fixup_partial_die (struct partial_die_info
*,
1333 struct dwarf2_cu
*);
1335 static gdb_byte
*read_attribute (const struct die_reader_specs
*,
1336 struct attribute
*, struct attr_abbrev
*,
1339 static unsigned int read_1_byte (bfd
*, const gdb_byte
*);
1341 static int read_1_signed_byte (bfd
*, const gdb_byte
*);
1343 static unsigned int read_2_bytes (bfd
*, const gdb_byte
*);
1345 static unsigned int read_4_bytes (bfd
*, const gdb_byte
*);
1347 static ULONGEST
read_8_bytes (bfd
*, const gdb_byte
*);
1349 static CORE_ADDR
read_address (bfd
*, gdb_byte
*ptr
, struct dwarf2_cu
*,
1352 static LONGEST
read_initial_length (bfd
*, gdb_byte
*, unsigned int *);
1354 static LONGEST read_checked_initial_length_and_offset
1355 (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
1356 unsigned int *, unsigned int *);
1358 static LONGEST
read_offset (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
1361 static LONGEST
read_offset_1 (bfd
*, gdb_byte
*, unsigned int);
1363 static sect_offset
read_abbrev_offset (struct dwarf2_section_info
*,
1366 static gdb_byte
*read_n_bytes (bfd
*, gdb_byte
*, unsigned int);
1368 static char *read_direct_string (bfd
*, gdb_byte
*, unsigned int *);
1370 static char *read_indirect_string (bfd
*, gdb_byte
*,
1371 const struct comp_unit_head
*,
1374 static char *read_indirect_string_from_dwz (struct dwz_file
*, LONGEST
);
1376 static ULONGEST
read_unsigned_leb128 (bfd
*, gdb_byte
*, unsigned int *);
1378 static LONGEST
read_signed_leb128 (bfd
*, gdb_byte
*, unsigned int *);
1380 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*, gdb_byte
*,
1383 static char *read_str_index (const struct die_reader_specs
*reader
,
1384 struct dwarf2_cu
*cu
, ULONGEST str_index
);
1386 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1388 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1389 struct dwarf2_cu
*);
1391 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
1394 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1395 struct dwarf2_cu
*cu
);
1397 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1399 static struct die_info
*die_specification (struct die_info
*die
,
1400 struct dwarf2_cu
**);
1402 static void free_line_header (struct line_header
*lh
);
1404 static void add_file_name (struct line_header
*, char *, unsigned int,
1405 unsigned int, unsigned int);
1407 static struct line_header
*dwarf_decode_line_header (unsigned int offset
,
1408 struct dwarf2_cu
*cu
);
1410 static void dwarf_decode_lines (struct line_header
*, const char *,
1411 struct dwarf2_cu
*, struct partial_symtab
*,
1414 static void dwarf2_start_subfile (char *, const char *, const char *);
1416 static void dwarf2_start_symtab (struct dwarf2_cu
*,
1417 const char *, const char *, CORE_ADDR
);
1419 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1420 struct dwarf2_cu
*);
1422 static struct symbol
*new_symbol_full (struct die_info
*, struct type
*,
1423 struct dwarf2_cu
*, struct symbol
*);
1425 static void dwarf2_const_value (struct attribute
*, struct symbol
*,
1426 struct dwarf2_cu
*);
1428 static void dwarf2_const_value_attr (struct attribute
*attr
,
1431 struct obstack
*obstack
,
1432 struct dwarf2_cu
*cu
, LONGEST
*value
,
1434 struct dwarf2_locexpr_baton
**baton
);
1436 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1438 static int need_gnat_info (struct dwarf2_cu
*);
1440 static struct type
*die_descriptive_type (struct die_info
*,
1441 struct dwarf2_cu
*);
1443 static void set_descriptive_type (struct type
*, struct die_info
*,
1444 struct dwarf2_cu
*);
1446 static struct type
*die_containing_type (struct die_info
*,
1447 struct dwarf2_cu
*);
1449 static struct type
*lookup_die_type (struct die_info
*, struct attribute
*,
1450 struct dwarf2_cu
*);
1452 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1454 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1456 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1458 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1459 const char *suffix
, int physname
,
1460 struct dwarf2_cu
*cu
);
1462 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1464 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1466 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1468 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1470 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1472 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1473 struct dwarf2_cu
*, struct partial_symtab
*);
1475 static int dwarf2_get_pc_bounds (struct die_info
*,
1476 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*,
1477 struct partial_symtab
*);
1479 static void get_scope_pc_bounds (struct die_info
*,
1480 CORE_ADDR
*, CORE_ADDR
*,
1481 struct dwarf2_cu
*);
1483 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1484 CORE_ADDR
, struct dwarf2_cu
*);
1486 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1487 struct dwarf2_cu
*);
1489 static void dwarf2_attach_fields_to_type (struct field_info
*,
1490 struct type
*, struct dwarf2_cu
*);
1492 static void dwarf2_add_member_fn (struct field_info
*,
1493 struct die_info
*, struct type
*,
1494 struct dwarf2_cu
*);
1496 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1498 struct dwarf2_cu
*);
1500 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1502 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1504 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1506 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1508 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1510 static struct type
*read_module_type (struct die_info
*die
,
1511 struct dwarf2_cu
*cu
);
1513 static const char *namespace_name (struct die_info
*die
,
1514 int *is_anonymous
, struct dwarf2_cu
*);
1516 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1518 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1520 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1521 struct dwarf2_cu
*);
1523 static struct die_info
*read_die_and_children (const struct die_reader_specs
*,
1525 gdb_byte
**new_info_ptr
,
1526 struct die_info
*parent
);
1528 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1530 gdb_byte
**new_info_ptr
,
1531 struct die_info
*parent
);
1533 static gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1534 struct die_info
**, gdb_byte
*, int *, int);
1536 static gdb_byte
*read_full_die (const struct die_reader_specs
*,
1537 struct die_info
**, gdb_byte
*, int *);
1539 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1541 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1544 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1546 static const char *dwarf2_full_name (const char *name
,
1547 struct die_info
*die
,
1548 struct dwarf2_cu
*cu
);
1550 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1551 struct dwarf2_cu
**);
1553 static const char *dwarf_tag_name (unsigned int);
1555 static const char *dwarf_attr_name (unsigned int);
1557 static const char *dwarf_form_name (unsigned int);
1559 static char *dwarf_bool_name (unsigned int);
1561 static const char *dwarf_type_encoding_name (unsigned int);
1563 static struct die_info
*sibling_die (struct die_info
*);
1565 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1567 static void dump_die_for_error (struct die_info
*);
1569 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1572 /*static*/ void dump_die (struct die_info
*, int max_level
);
1574 static void store_in_ref_table (struct die_info
*,
1575 struct dwarf2_cu
*);
1577 static int is_ref_attr (struct attribute
*);
1579 static sect_offset
dwarf2_get_ref_die_offset (struct attribute
*);
1581 static LONGEST
dwarf2_get_attr_constant_value (struct attribute
*, int);
1583 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1585 struct dwarf2_cu
**);
1587 static struct die_info
*follow_die_ref (struct die_info
*,
1589 struct dwarf2_cu
**);
1591 static struct die_info
*follow_die_sig (struct die_info
*,
1593 struct dwarf2_cu
**);
1595 static struct signatured_type
*lookup_signatured_type_at_offset
1596 (struct objfile
*objfile
,
1597 struct dwarf2_section_info
*section
, sect_offset offset
);
1599 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1601 static void read_signatured_type (struct signatured_type
*);
1603 static struct type_unit_group
*get_type_unit_group
1604 (struct dwarf2_cu
*, struct attribute
*);
1606 static void build_type_unit_groups (die_reader_func_ftype
*, void *);
1608 /* memory allocation interface */
1610 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1612 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1614 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int,
1617 static int attr_form_is_block (struct attribute
*);
1619 static int attr_form_is_section_offset (struct attribute
*);
1621 static int attr_form_is_constant (struct attribute
*);
1623 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1624 struct dwarf2_loclist_baton
*baton
,
1625 struct attribute
*attr
);
1627 static void dwarf2_symbol_mark_computed (struct attribute
*attr
,
1629 struct dwarf2_cu
*cu
);
1631 static gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1633 struct abbrev_info
*abbrev
);
1635 static void free_stack_comp_unit (void *);
1637 static hashval_t
partial_die_hash (const void *item
);
1639 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1641 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1642 (sect_offset offset
, unsigned int offset_in_dwz
, struct objfile
*objfile
);
1644 static void init_one_comp_unit (struct dwarf2_cu
*cu
,
1645 struct dwarf2_per_cu_data
*per_cu
);
1647 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1648 struct die_info
*comp_unit_die
,
1649 enum language pretend_language
);
1651 static void free_heap_comp_unit (void *);
1653 static void free_cached_comp_units (void *);
1655 static void age_cached_comp_units (void);
1657 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1659 static struct type
*set_die_type (struct die_info
*, struct type
*,
1660 struct dwarf2_cu
*);
1662 static void create_all_comp_units (struct objfile
*);
1664 static int create_all_type_units (struct objfile
*);
1666 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1669 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1672 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1675 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1676 struct dwarf2_per_cu_data
*);
1678 static void dwarf2_mark (struct dwarf2_cu
*);
1680 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1682 static struct type
*get_die_type_at_offset (sect_offset
,
1683 struct dwarf2_per_cu_data
*per_cu
);
1685 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1687 static void dwarf2_release_queue (void *dummy
);
1689 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1690 enum language pretend_language
);
1692 static int maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
1693 struct dwarf2_per_cu_data
*per_cu
,
1694 enum language pretend_language
);
1696 static void process_queue (void);
1698 static void find_file_and_directory (struct die_info
*die
,
1699 struct dwarf2_cu
*cu
,
1700 const char **name
, const char **comp_dir
);
1702 static char *file_full_name (int file
, struct line_header
*lh
,
1703 const char *comp_dir
);
1705 static gdb_byte
*read_and_check_comp_unit_head
1706 (struct comp_unit_head
*header
,
1707 struct dwarf2_section_info
*section
,
1708 struct dwarf2_section_info
*abbrev_section
, gdb_byte
*info_ptr
,
1709 int is_debug_types_section
);
1711 static void init_cutu_and_read_dies
1712 (struct dwarf2_per_cu_data
*this_cu
, struct abbrev_table
*abbrev_table
,
1713 int use_existing_cu
, int keep
,
1714 die_reader_func_ftype
*die_reader_func
, void *data
);
1716 static void init_cutu_and_read_dies_simple
1717 (struct dwarf2_per_cu_data
*this_cu
,
1718 die_reader_func_ftype
*die_reader_func
, void *data
);
1720 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1722 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
1724 static struct dwo_unit
*lookup_dwo_comp_unit
1725 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
1727 static struct dwo_unit
*lookup_dwo_type_unit
1728 (struct signatured_type
*, const char *, const char *);
1730 static void free_dwo_file_cleanup (void *);
1732 static void process_cu_includes (void);
1734 static void check_producer (struct dwarf2_cu
*cu
);
1738 /* Convert VALUE between big- and little-endian. */
1740 byte_swap (offset_type value
)
1744 result
= (value
& 0xff) << 24;
1745 result
|= (value
& 0xff00) << 8;
1746 result
|= (value
& 0xff0000) >> 8;
1747 result
|= (value
& 0xff000000) >> 24;
1751 #define MAYBE_SWAP(V) byte_swap (V)
1754 #define MAYBE_SWAP(V) (V)
1755 #endif /* WORDS_BIGENDIAN */
1757 /* The suffix for an index file. */
1758 #define INDEX_SUFFIX ".gdb-index"
1760 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1761 struct dwarf2_cu
*cu
);
1763 /* Try to locate the sections we need for DWARF 2 debugging
1764 information and return true if we have enough to do something.
1765 NAMES points to the dwarf2 section names, or is NULL if the standard
1766 ELF names are used. */
1769 dwarf2_has_info (struct objfile
*objfile
,
1770 const struct dwarf2_debug_sections
*names
)
1772 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
1773 if (!dwarf2_per_objfile
)
1775 /* Initialize per-objfile state. */
1776 struct dwarf2_per_objfile
*data
1777 = obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
1779 memset (data
, 0, sizeof (*data
));
1780 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
1781 dwarf2_per_objfile
= data
;
1783 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
,
1785 dwarf2_per_objfile
->objfile
= objfile
;
1787 return (dwarf2_per_objfile
->info
.asection
!= NULL
1788 && dwarf2_per_objfile
->abbrev
.asection
!= NULL
);
1791 /* When loading sections, we look either for uncompressed section or for
1792 compressed section names. */
1795 section_is_p (const char *section_name
,
1796 const struct dwarf2_section_names
*names
)
1798 if (names
->normal
!= NULL
1799 && strcmp (section_name
, names
->normal
) == 0)
1801 if (names
->compressed
!= NULL
1802 && strcmp (section_name
, names
->compressed
) == 0)
1807 /* This function is mapped across the sections and remembers the
1808 offset and size of each of the debugging sections we are interested
1812 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *vnames
)
1814 const struct dwarf2_debug_sections
*names
;
1815 flagword aflag
= bfd_get_section_flags (abfd
, sectp
);
1818 names
= &dwarf2_elf_names
;
1820 names
= (const struct dwarf2_debug_sections
*) vnames
;
1822 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
1825 else if (section_is_p (sectp
->name
, &names
->info
))
1827 dwarf2_per_objfile
->info
.asection
= sectp
;
1828 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
1830 else if (section_is_p (sectp
->name
, &names
->abbrev
))
1832 dwarf2_per_objfile
->abbrev
.asection
= sectp
;
1833 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
1835 else if (section_is_p (sectp
->name
, &names
->line
))
1837 dwarf2_per_objfile
->line
.asection
= sectp
;
1838 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
1840 else if (section_is_p (sectp
->name
, &names
->loc
))
1842 dwarf2_per_objfile
->loc
.asection
= sectp
;
1843 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
1845 else if (section_is_p (sectp
->name
, &names
->macinfo
))
1847 dwarf2_per_objfile
->macinfo
.asection
= sectp
;
1848 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
1850 else if (section_is_p (sectp
->name
, &names
->macro
))
1852 dwarf2_per_objfile
->macro
.asection
= sectp
;
1853 dwarf2_per_objfile
->macro
.size
= bfd_get_section_size (sectp
);
1855 else if (section_is_p (sectp
->name
, &names
->str
))
1857 dwarf2_per_objfile
->str
.asection
= sectp
;
1858 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
1860 else if (section_is_p (sectp
->name
, &names
->addr
))
1862 dwarf2_per_objfile
->addr
.asection
= sectp
;
1863 dwarf2_per_objfile
->addr
.size
= bfd_get_section_size (sectp
);
1865 else if (section_is_p (sectp
->name
, &names
->frame
))
1867 dwarf2_per_objfile
->frame
.asection
= sectp
;
1868 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
1870 else if (section_is_p (sectp
->name
, &names
->eh_frame
))
1872 dwarf2_per_objfile
->eh_frame
.asection
= sectp
;
1873 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
1875 else if (section_is_p (sectp
->name
, &names
->ranges
))
1877 dwarf2_per_objfile
->ranges
.asection
= sectp
;
1878 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
1880 else if (section_is_p (sectp
->name
, &names
->types
))
1882 struct dwarf2_section_info type_section
;
1884 memset (&type_section
, 0, sizeof (type_section
));
1885 type_section
.asection
= sectp
;
1886 type_section
.size
= bfd_get_section_size (sectp
);
1888 VEC_safe_push (dwarf2_section_info_def
, dwarf2_per_objfile
->types
,
1891 else if (section_is_p (sectp
->name
, &names
->gdb_index
))
1893 dwarf2_per_objfile
->gdb_index
.asection
= sectp
;
1894 dwarf2_per_objfile
->gdb_index
.size
= bfd_get_section_size (sectp
);
1897 if ((bfd_get_section_flags (abfd
, sectp
) & SEC_LOAD
)
1898 && bfd_section_vma (abfd
, sectp
) == 0)
1899 dwarf2_per_objfile
->has_section_at_zero
= 1;
1902 /* A helper function that decides whether a section is empty,
1906 dwarf2_section_empty_p (struct dwarf2_section_info
*info
)
1908 return info
->asection
== NULL
|| info
->size
== 0;
1911 /* Read the contents of the section INFO.
1912 OBJFILE is the main object file, but not necessarily the file where
1913 the section comes from. E.g., for DWO files INFO->asection->owner
1914 is the bfd of the DWO file.
1915 If the section is compressed, uncompress it before returning. */
1918 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
1920 asection
*sectp
= info
->asection
;
1922 gdb_byte
*buf
, *retbuf
;
1923 unsigned char header
[4];
1927 info
->buffer
= NULL
;
1930 if (dwarf2_section_empty_p (info
))
1933 abfd
= sectp
->owner
;
1935 /* If the section has relocations, we must read it ourselves.
1936 Otherwise we attach it to the BFD. */
1937 if ((sectp
->flags
& SEC_RELOC
) == 0)
1939 const gdb_byte
*bytes
= gdb_bfd_map_section (sectp
, &info
->size
);
1941 /* We have to cast away const here for historical reasons.
1942 Fixing dwarf2read to be const-correct would be quite nice. */
1943 info
->buffer
= (gdb_byte
*) bytes
;
1947 buf
= obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
1950 /* When debugging .o files, we may need to apply relocations; see
1951 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1952 We never compress sections in .o files, so we only need to
1953 try this when the section is not compressed. */
1954 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
1957 info
->buffer
= retbuf
;
1961 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1962 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
1963 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1964 bfd_get_filename (abfd
));
1967 /* A helper function that returns the size of a section in a safe way.
1968 If you are positive that the section has been read before using the
1969 size, then it is safe to refer to the dwarf2_section_info object's
1970 "size" field directly. In other cases, you must call this
1971 function, because for compressed sections the size field is not set
1972 correctly until the section has been read. */
1974 static bfd_size_type
1975 dwarf2_section_size (struct objfile
*objfile
,
1976 struct dwarf2_section_info
*info
)
1979 dwarf2_read_section (objfile
, info
);
1983 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1987 dwarf2_get_section_info (struct objfile
*objfile
,
1988 enum dwarf2_section_enum sect
,
1989 asection
**sectp
, gdb_byte
**bufp
,
1990 bfd_size_type
*sizep
)
1992 struct dwarf2_per_objfile
*data
1993 = objfile_data (objfile
, dwarf2_objfile_data_key
);
1994 struct dwarf2_section_info
*info
;
1996 /* We may see an objfile without any DWARF, in which case we just
2007 case DWARF2_DEBUG_FRAME
:
2008 info
= &data
->frame
;
2010 case DWARF2_EH_FRAME
:
2011 info
= &data
->eh_frame
;
2014 gdb_assert_not_reached ("unexpected section");
2017 dwarf2_read_section (objfile
, info
);
2019 *sectp
= info
->asection
;
2020 *bufp
= info
->buffer
;
2021 *sizep
= info
->size
;
2024 /* A helper function to find the sections for a .dwz file. */
2027 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2029 struct dwz_file
*dwz_file
= arg
;
2031 /* Note that we only support the standard ELF names, because .dwz
2032 is ELF-only (at the time of writing). */
2033 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2035 dwz_file
->abbrev
.asection
= sectp
;
2036 dwz_file
->abbrev
.size
= bfd_get_section_size (sectp
);
2038 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2040 dwz_file
->info
.asection
= sectp
;
2041 dwz_file
->info
.size
= bfd_get_section_size (sectp
);
2043 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2045 dwz_file
->str
.asection
= sectp
;
2046 dwz_file
->str
.size
= bfd_get_section_size (sectp
);
2048 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2050 dwz_file
->line
.asection
= sectp
;
2051 dwz_file
->line
.size
= bfd_get_section_size (sectp
);
2053 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2055 dwz_file
->macro
.asection
= sectp
;
2056 dwz_file
->macro
.size
= bfd_get_section_size (sectp
);
2058 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2060 dwz_file
->gdb_index
.asection
= sectp
;
2061 dwz_file
->gdb_index
.size
= bfd_get_section_size (sectp
);
2065 /* Open the separate '.dwz' debug file, if needed. Error if the file
2068 static struct dwz_file
*
2069 dwarf2_get_dwz_file (void)
2071 bfd
*abfd
, *dwz_bfd
;
2074 struct cleanup
*cleanup
;
2075 const char *filename
;
2076 struct dwz_file
*result
;
2078 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2079 return dwarf2_per_objfile
->dwz_file
;
2081 abfd
= dwarf2_per_objfile
->objfile
->obfd
;
2082 section
= bfd_get_section_by_name (abfd
, ".gnu_debugaltlink");
2083 if (section
== NULL
)
2084 error (_("could not find '.gnu_debugaltlink' section"));
2085 if (!bfd_malloc_and_get_section (abfd
, section
, &data
))
2086 error (_("could not read '.gnu_debugaltlink' section: %s"),
2087 bfd_errmsg (bfd_get_error ()));
2088 cleanup
= make_cleanup (xfree
, data
);
2091 if (!IS_ABSOLUTE_PATH (filename
))
2093 char *abs
= gdb_realpath (dwarf2_per_objfile
->objfile
->name
);
2096 make_cleanup (xfree
, abs
);
2097 abs
= ldirname (abs
);
2098 make_cleanup (xfree
, abs
);
2100 rel
= concat (abs
, SLASH_STRING
, filename
, (char *) NULL
);
2101 make_cleanup (xfree
, rel
);
2105 /* The format is just a NUL-terminated file name, followed by the
2106 build-id. For now, though, we ignore the build-id. */
2107 dwz_bfd
= gdb_bfd_open (filename
, gnutarget
, -1);
2108 if (dwz_bfd
== NULL
)
2109 error (_("could not read '%s': %s"), filename
,
2110 bfd_errmsg (bfd_get_error ()));
2112 if (!bfd_check_format (dwz_bfd
, bfd_object
))
2114 gdb_bfd_unref (dwz_bfd
);
2115 error (_("file '%s' was not usable: %s"), filename
,
2116 bfd_errmsg (bfd_get_error ()));
2119 result
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
2121 result
->dwz_bfd
= dwz_bfd
;
2123 bfd_map_over_sections (dwz_bfd
, locate_dwz_sections
, result
);
2125 do_cleanups (cleanup
);
2127 dwarf2_per_objfile
->dwz_file
= result
;
2131 /* DWARF quick_symbols_functions support. */
2133 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2134 unique line tables, so we maintain a separate table of all .debug_line
2135 derived entries to support the sharing.
2136 All the quick functions need is the list of file names. We discard the
2137 line_header when we're done and don't need to record it here. */
2138 struct quick_file_names
2140 /* The data used to construct the hash key. */
2141 struct stmt_list_hash hash
;
2143 /* The number of entries in file_names, real_names. */
2144 unsigned int num_file_names
;
2146 /* The file names from the line table, after being run through
2148 const char **file_names
;
2150 /* The file names from the line table after being run through
2151 gdb_realpath. These are computed lazily. */
2152 const char **real_names
;
2155 /* When using the index (and thus not using psymtabs), each CU has an
2156 object of this type. This is used to hold information needed by
2157 the various "quick" methods. */
2158 struct dwarf2_per_cu_quick_data
2160 /* The file table. This can be NULL if there was no file table
2161 or it's currently not read in.
2162 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2163 struct quick_file_names
*file_names
;
2165 /* The corresponding symbol table. This is NULL if symbols for this
2166 CU have not yet been read. */
2167 struct symtab
*symtab
;
2169 /* A temporary mark bit used when iterating over all CUs in
2170 expand_symtabs_matching. */
2171 unsigned int mark
: 1;
2173 /* True if we've tried to read the file table and found there isn't one.
2174 There will be no point in trying to read it again next time. */
2175 unsigned int no_file_data
: 1;
2178 /* Utility hash function for a stmt_list_hash. */
2181 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2185 if (stmt_list_hash
->dwo_unit
!= NULL
)
2186 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2187 v
+= stmt_list_hash
->line_offset
.sect_off
;
2191 /* Utility equality function for a stmt_list_hash. */
2194 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2195 const struct stmt_list_hash
*rhs
)
2197 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2199 if (lhs
->dwo_unit
!= NULL
2200 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2203 return lhs
->line_offset
.sect_off
== rhs
->line_offset
.sect_off
;
2206 /* Hash function for a quick_file_names. */
2209 hash_file_name_entry (const void *e
)
2211 const struct quick_file_names
*file_data
= e
;
2213 return hash_stmt_list_entry (&file_data
->hash
);
2216 /* Equality function for a quick_file_names. */
2219 eq_file_name_entry (const void *a
, const void *b
)
2221 const struct quick_file_names
*ea
= a
;
2222 const struct quick_file_names
*eb
= b
;
2224 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2227 /* Delete function for a quick_file_names. */
2230 delete_file_name_entry (void *e
)
2232 struct quick_file_names
*file_data
= e
;
2235 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2237 xfree ((void*) file_data
->file_names
[i
]);
2238 if (file_data
->real_names
)
2239 xfree ((void*) file_data
->real_names
[i
]);
2242 /* The space for the struct itself lives on objfile_obstack,
2243 so we don't free it here. */
2246 /* Create a quick_file_names hash table. */
2249 create_quick_file_names_table (unsigned int nr_initial_entries
)
2251 return htab_create_alloc (nr_initial_entries
,
2252 hash_file_name_entry
, eq_file_name_entry
,
2253 delete_file_name_entry
, xcalloc
, xfree
);
2256 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2257 have to be created afterwards. You should call age_cached_comp_units after
2258 processing PER_CU->CU. dw2_setup must have been already called. */
2261 load_cu (struct dwarf2_per_cu_data
*per_cu
)
2263 if (per_cu
->is_debug_types
)
2264 load_full_type_unit (per_cu
);
2266 load_full_comp_unit (per_cu
, language_minimal
);
2268 gdb_assert (per_cu
->cu
!= NULL
);
2270 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2273 /* Read in the symbols for PER_CU. */
2276 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2278 struct cleanup
*back_to
;
2280 /* Skip type_unit_groups, reading the type units they contain
2281 is handled elsewhere. */
2282 if (IS_TYPE_UNIT_GROUP (per_cu
))
2285 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
2287 if (dwarf2_per_objfile
->using_index
2288 ? per_cu
->v
.quick
->symtab
== NULL
2289 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2291 queue_comp_unit (per_cu
, language_minimal
);
2297 /* Age the cache, releasing compilation units that have not
2298 been used recently. */
2299 age_cached_comp_units ();
2301 do_cleanups (back_to
);
2304 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2305 the objfile from which this CU came. Returns the resulting symbol
2308 static struct symtab
*
2309 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2311 gdb_assert (dwarf2_per_objfile
->using_index
);
2312 if (!per_cu
->v
.quick
->symtab
)
2314 struct cleanup
*back_to
= make_cleanup (free_cached_comp_units
, NULL
);
2315 increment_reading_symtab ();
2316 dw2_do_instantiate_symtab (per_cu
);
2317 process_cu_includes ();
2318 do_cleanups (back_to
);
2320 return per_cu
->v
.quick
->symtab
;
2323 /* Return the CU given its index.
2325 This is intended for loops like:
2327 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2328 + dwarf2_per_objfile->n_type_units); ++i)
2330 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
2336 static struct dwarf2_per_cu_data
*
2337 dw2_get_cu (int index
)
2339 if (index
>= dwarf2_per_objfile
->n_comp_units
)
2341 index
-= dwarf2_per_objfile
->n_comp_units
;
2342 gdb_assert (index
< dwarf2_per_objfile
->n_type_units
);
2343 return &dwarf2_per_objfile
->all_type_units
[index
]->per_cu
;
2346 return dwarf2_per_objfile
->all_comp_units
[index
];
2349 /* Return the primary CU given its index.
2350 The difference between this function and dw2_get_cu is in the handling
2351 of type units (TUs). Here we return the type_unit_group object.
2353 This is intended for loops like:
2355 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2356 + dwarf2_per_objfile->n_type_unit_groups); ++i)
2358 struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i);
2364 static struct dwarf2_per_cu_data
*
2365 dw2_get_primary_cu (int index
)
2367 if (index
>= dwarf2_per_objfile
->n_comp_units
)
2369 index
-= dwarf2_per_objfile
->n_comp_units
;
2370 gdb_assert (index
< dwarf2_per_objfile
->n_type_unit_groups
);
2371 return &dwarf2_per_objfile
->all_type_unit_groups
[index
]->per_cu
;
2374 return dwarf2_per_objfile
->all_comp_units
[index
];
2377 /* A helper for create_cus_from_index that handles a given list of
2381 create_cus_from_index_list (struct objfile
*objfile
,
2382 const gdb_byte
*cu_list
, offset_type n_elements
,
2383 struct dwarf2_section_info
*section
,
2389 for (i
= 0; i
< n_elements
; i
+= 2)
2391 struct dwarf2_per_cu_data
*the_cu
;
2392 ULONGEST offset
, length
;
2394 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2395 offset
= extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2396 length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2399 the_cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2400 struct dwarf2_per_cu_data
);
2401 the_cu
->offset
.sect_off
= offset
;
2402 the_cu
->length
= length
;
2403 the_cu
->objfile
= objfile
;
2404 the_cu
->info_or_types_section
= section
;
2405 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2406 struct dwarf2_per_cu_quick_data
);
2407 the_cu
->is_dwz
= is_dwz
;
2408 dwarf2_per_objfile
->all_comp_units
[base_offset
+ i
/ 2] = the_cu
;
2412 /* Read the CU list from the mapped index, and use it to create all
2413 the CU objects for this objfile. */
2416 create_cus_from_index (struct objfile
*objfile
,
2417 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
2418 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
2420 struct dwz_file
*dwz
;
2422 dwarf2_per_objfile
->n_comp_units
= (cu_list_elements
+ dwz_elements
) / 2;
2423 dwarf2_per_objfile
->all_comp_units
2424 = obstack_alloc (&objfile
->objfile_obstack
,
2425 dwarf2_per_objfile
->n_comp_units
2426 * sizeof (struct dwarf2_per_cu_data
*));
2428 create_cus_from_index_list (objfile
, cu_list
, cu_list_elements
,
2429 &dwarf2_per_objfile
->info
, 0, 0);
2431 if (dwz_elements
== 0)
2434 dwz
= dwarf2_get_dwz_file ();
2435 create_cus_from_index_list (objfile
, dwz_list
, dwz_elements
, &dwz
->info
, 1,
2436 cu_list_elements
/ 2);
2439 /* Create the signatured type hash table from the index. */
2442 create_signatured_type_table_from_index (struct objfile
*objfile
,
2443 struct dwarf2_section_info
*section
,
2444 const gdb_byte
*bytes
,
2445 offset_type elements
)
2448 htab_t sig_types_hash
;
2450 dwarf2_per_objfile
->n_type_units
= elements
/ 3;
2451 dwarf2_per_objfile
->all_type_units
2452 = obstack_alloc (&objfile
->objfile_obstack
,
2453 dwarf2_per_objfile
->n_type_units
2454 * sizeof (struct signatured_type
*));
2456 sig_types_hash
= allocate_signatured_type_table (objfile
);
2458 for (i
= 0; i
< elements
; i
+= 3)
2460 struct signatured_type
*sig_type
;
2461 ULONGEST offset
, type_offset_in_tu
, signature
;
2464 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2465 offset
= extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
2466 type_offset_in_tu
= extract_unsigned_integer (bytes
+ 8, 8,
2468 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
2471 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2472 struct signatured_type
);
2473 sig_type
->signature
= signature
;
2474 sig_type
->type_offset_in_tu
.cu_off
= type_offset_in_tu
;
2475 sig_type
->per_cu
.is_debug_types
= 1;
2476 sig_type
->per_cu
.info_or_types_section
= section
;
2477 sig_type
->per_cu
.offset
.sect_off
= offset
;
2478 sig_type
->per_cu
.objfile
= objfile
;
2479 sig_type
->per_cu
.v
.quick
2480 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2481 struct dwarf2_per_cu_quick_data
);
2483 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
2486 dwarf2_per_objfile
->all_type_units
[i
/ 3] = sig_type
;
2489 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
2492 /* Read the address map data from the mapped index, and use it to
2493 populate the objfile's psymtabs_addrmap. */
2496 create_addrmap_from_index (struct objfile
*objfile
, struct mapped_index
*index
)
2498 const gdb_byte
*iter
, *end
;
2499 struct obstack temp_obstack
;
2500 struct addrmap
*mutable_map
;
2501 struct cleanup
*cleanup
;
2504 obstack_init (&temp_obstack
);
2505 cleanup
= make_cleanup_obstack_free (&temp_obstack
);
2506 mutable_map
= addrmap_create_mutable (&temp_obstack
);
2508 iter
= index
->address_table
;
2509 end
= iter
+ index
->address_table_size
;
2511 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2515 ULONGEST hi
, lo
, cu_index
;
2516 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2518 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2520 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
2523 addrmap_set_empty (mutable_map
, lo
+ baseaddr
, hi
+ baseaddr
- 1,
2524 dw2_get_cu (cu_index
));
2527 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
2528 &objfile
->objfile_obstack
);
2529 do_cleanups (cleanup
);
2532 /* The hash function for strings in the mapped index. This is the same as
2533 SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the
2534 implementation. This is necessary because the hash function is tied to the
2535 format of the mapped index file. The hash values do not have to match with
2538 Use INT_MAX for INDEX_VERSION if you generate the current index format. */
2541 mapped_index_string_hash (int index_version
, const void *p
)
2543 const unsigned char *str
= (const unsigned char *) p
;
2547 while ((c
= *str
++) != 0)
2549 if (index_version
>= 5)
2551 r
= r
* 67 + c
- 113;
2557 /* Find a slot in the mapped index INDEX for the object named NAME.
2558 If NAME is found, set *VEC_OUT to point to the CU vector in the
2559 constant pool and return 1. If NAME cannot be found, return 0. */
2562 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
2563 offset_type
**vec_out
)
2565 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
2567 offset_type slot
, step
;
2568 int (*cmp
) (const char *, const char *);
2570 if (current_language
->la_language
== language_cplus
2571 || current_language
->la_language
== language_java
2572 || current_language
->la_language
== language_fortran
)
2574 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
2576 const char *paren
= strchr (name
, '(');
2582 dup
= xmalloc (paren
- name
+ 1);
2583 memcpy (dup
, name
, paren
- name
);
2584 dup
[paren
- name
] = 0;
2586 make_cleanup (xfree
, dup
);
2591 /* Index version 4 did not support case insensitive searches. But the
2592 indices for case insensitive languages are built in lowercase, therefore
2593 simulate our NAME being searched is also lowercased. */
2594 hash
= mapped_index_string_hash ((index
->version
== 4
2595 && case_sensitivity
== case_sensitive_off
2596 ? 5 : index
->version
),
2599 slot
= hash
& (index
->symbol_table_slots
- 1);
2600 step
= ((hash
* 17) & (index
->symbol_table_slots
- 1)) | 1;
2601 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
2605 /* Convert a slot number to an offset into the table. */
2606 offset_type i
= 2 * slot
;
2608 if (index
->symbol_table
[i
] == 0 && index
->symbol_table
[i
+ 1] == 0)
2610 do_cleanups (back_to
);
2614 str
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[i
]);
2615 if (!cmp (name
, str
))
2617 *vec_out
= (offset_type
*) (index
->constant_pool
2618 + MAYBE_SWAP (index
->symbol_table
[i
+ 1]));
2619 do_cleanups (back_to
);
2623 slot
= (slot
+ step
) & (index
->symbol_table_slots
- 1);
2627 /* A helper function that reads the .gdb_index from SECTION and fills
2628 in MAP. FILENAME is the name of the file containing the section;
2629 it is used for error reporting. DEPRECATED_OK is nonzero if it is
2630 ok to use deprecated sections.
2632 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
2633 out parameters that are filled in with information about the CU and
2634 TU lists in the section.
2636 Returns 1 if all went well, 0 otherwise. */
2639 read_index_from_section (struct objfile
*objfile
,
2640 const char *filename
,
2642 struct dwarf2_section_info
*section
,
2643 struct mapped_index
*map
,
2644 const gdb_byte
**cu_list
,
2645 offset_type
*cu_list_elements
,
2646 const gdb_byte
**types_list
,
2647 offset_type
*types_list_elements
)
2650 offset_type version
;
2651 offset_type
*metadata
;
2654 if (dwarf2_section_empty_p (section
))
2657 /* Older elfutils strip versions could keep the section in the main
2658 executable while splitting it for the separate debug info file. */
2659 if ((bfd_get_file_flags (section
->asection
) & SEC_HAS_CONTENTS
) == 0)
2662 dwarf2_read_section (objfile
, section
);
2664 addr
= section
->buffer
;
2665 /* Version check. */
2666 version
= MAYBE_SWAP (*(offset_type
*) addr
);
2667 /* Versions earlier than 3 emitted every copy of a psymbol. This
2668 causes the index to behave very poorly for certain requests. Version 3
2669 contained incomplete addrmap. So, it seems better to just ignore such
2673 static int warning_printed
= 0;
2674 if (!warning_printed
)
2676 warning (_("Skipping obsolete .gdb_index section in %s."),
2678 warning_printed
= 1;
2682 /* Index version 4 uses a different hash function than index version
2685 Versions earlier than 6 did not emit psymbols for inlined
2686 functions. Using these files will cause GDB not to be able to
2687 set breakpoints on inlined functions by name, so we ignore these
2688 indices unless the user has done
2689 "set use-deprecated-index-sections on". */
2690 if (version
< 6 && !deprecated_ok
)
2692 static int warning_printed
= 0;
2693 if (!warning_printed
)
2696 Skipping deprecated .gdb_index section in %s.\n\
2697 Do \"set use-deprecated-index-sections on\" before the file is read\n\
2698 to use the section anyway."),
2700 warning_printed
= 1;
2704 /* Version 7 indices generated by gold refer to the CU for a symbol instead
2705 of the TU (for symbols coming from TUs). It's just a performance bug, and
2706 we can't distinguish gdb-generated indices from gold-generated ones, so
2707 nothing to do here. */
2709 /* Indexes with higher version than the one supported by GDB may be no
2710 longer backward compatible. */
2714 map
->version
= version
;
2715 map
->total_size
= section
->size
;
2717 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
2720 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2721 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
2725 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2726 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
2727 - MAYBE_SWAP (metadata
[i
]))
2731 map
->address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
2732 map
->address_table_size
= (MAYBE_SWAP (metadata
[i
+ 1])
2733 - MAYBE_SWAP (metadata
[i
]));
2736 map
->symbol_table
= (offset_type
*) (addr
+ MAYBE_SWAP (metadata
[i
]));
2737 map
->symbol_table_slots
= ((MAYBE_SWAP (metadata
[i
+ 1])
2738 - MAYBE_SWAP (metadata
[i
]))
2739 / (2 * sizeof (offset_type
)));
2742 map
->constant_pool
= addr
+ MAYBE_SWAP (metadata
[i
]);
2748 /* Read the index file. If everything went ok, initialize the "quick"
2749 elements of all the CUs and return 1. Otherwise, return 0. */
2752 dwarf2_read_index (struct objfile
*objfile
)
2754 struct mapped_index local_map
, *map
;
2755 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
2756 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
2758 if (!read_index_from_section (objfile
, objfile
->name
,
2759 use_deprecated_index_sections
,
2760 &dwarf2_per_objfile
->gdb_index
, &local_map
,
2761 &cu_list
, &cu_list_elements
,
2762 &types_list
, &types_list_elements
))
2765 /* Don't use the index if it's empty. */
2766 if (local_map
.symbol_table_slots
== 0)
2769 /* If there is a .dwz file, read it so we can get its CU list as
2771 if (bfd_get_section_by_name (objfile
->obfd
, ".gnu_debugaltlink") != NULL
)
2773 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
2774 struct mapped_index dwz_map
;
2775 const gdb_byte
*dwz_types_ignore
;
2776 offset_type dwz_types_elements_ignore
;
2778 if (!read_index_from_section (objfile
, bfd_get_filename (dwz
->dwz_bfd
),
2780 &dwz
->gdb_index
, &dwz_map
,
2781 &dwz_list
, &dwz_list_elements
,
2783 &dwz_types_elements_ignore
))
2785 warning (_("could not read '.gdb_index' section from %s; skipping"),
2786 bfd_get_filename (dwz
->dwz_bfd
));
2791 create_cus_from_index (objfile
, cu_list
, cu_list_elements
, dwz_list
,
2794 if (types_list_elements
)
2796 struct dwarf2_section_info
*section
;
2798 /* We can only handle a single .debug_types when we have an
2800 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
2803 section
= VEC_index (dwarf2_section_info_def
,
2804 dwarf2_per_objfile
->types
, 0);
2806 create_signatured_type_table_from_index (objfile
, section
, types_list
,
2807 types_list_elements
);
2810 create_addrmap_from_index (objfile
, &local_map
);
2812 map
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct mapped_index
));
2815 dwarf2_per_objfile
->index_table
= map
;
2816 dwarf2_per_objfile
->using_index
= 1;
2817 dwarf2_per_objfile
->quick_file_names_table
=
2818 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
2823 /* A helper for the "quick" functions which sets the global
2824 dwarf2_per_objfile according to OBJFILE. */
2827 dw2_setup (struct objfile
*objfile
)
2829 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
2830 gdb_assert (dwarf2_per_objfile
);
2833 /* die_reader_func for dw2_get_file_names. */
2836 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
2838 struct die_info
*comp_unit_die
,
2842 struct dwarf2_cu
*cu
= reader
->cu
;
2843 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
2844 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2845 struct dwarf2_per_cu_data
*lh_cu
;
2846 struct line_header
*lh
;
2847 struct attribute
*attr
;
2849 const char *name
, *comp_dir
;
2851 struct quick_file_names
*qfn
;
2852 unsigned int line_offset
;
2854 /* Our callers never want to match partial units -- instead they
2855 will match the enclosing full CU. */
2856 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
2858 this_cu
->v
.quick
->no_file_data
= 1;
2862 /* If we're reading the line header for TUs, store it in the "per_cu"
2864 if (this_cu
->is_debug_types
)
2866 struct type_unit_group
*tu_group
= data
;
2868 gdb_assert (tu_group
!= NULL
);
2869 lh_cu
= &tu_group
->per_cu
;
2878 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
2881 struct quick_file_names find_entry
;
2883 line_offset
= DW_UNSND (attr
);
2885 /* We may have already read in this line header (TU line header sharing).
2886 If we have we're done. */
2887 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
2888 find_entry
.hash
.line_offset
.sect_off
= line_offset
;
2889 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
2890 &find_entry
, INSERT
);
2893 lh_cu
->v
.quick
->file_names
= *slot
;
2897 lh
= dwarf_decode_line_header (line_offset
, cu
);
2901 lh_cu
->v
.quick
->no_file_data
= 1;
2905 qfn
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*qfn
));
2906 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
2907 qfn
->hash
.line_offset
.sect_off
= line_offset
;
2908 gdb_assert (slot
!= NULL
);
2911 find_file_and_directory (comp_unit_die
, cu
, &name
, &comp_dir
);
2913 qfn
->num_file_names
= lh
->num_file_names
;
2914 qfn
->file_names
= obstack_alloc (&objfile
->objfile_obstack
,
2915 lh
->num_file_names
* sizeof (char *));
2916 for (i
= 0; i
< lh
->num_file_names
; ++i
)
2917 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
, comp_dir
);
2918 qfn
->real_names
= NULL
;
2920 free_line_header (lh
);
2922 lh_cu
->v
.quick
->file_names
= qfn
;
2925 /* A helper for the "quick" functions which attempts to read the line
2926 table for THIS_CU. */
2928 static struct quick_file_names
*
2929 dw2_get_file_names (struct objfile
*objfile
,
2930 struct dwarf2_per_cu_data
*this_cu
)
2932 /* For TUs this should only be called on the parent group. */
2933 if (this_cu
->is_debug_types
)
2934 gdb_assert (IS_TYPE_UNIT_GROUP (this_cu
));
2936 if (this_cu
->v
.quick
->file_names
!= NULL
)
2937 return this_cu
->v
.quick
->file_names
;
2938 /* If we know there is no line data, no point in looking again. */
2939 if (this_cu
->v
.quick
->no_file_data
)
2942 /* If DWO files are in use, we can still find the DW_AT_stmt_list attribute
2943 in the stub for CUs, there's is no need to lookup the DWO file.
2944 However, that's not the case for TUs where DW_AT_stmt_list lives in the
2946 if (this_cu
->is_debug_types
)
2948 struct type_unit_group
*tu_group
= this_cu
->type_unit_group
;
2950 init_cutu_and_read_dies (tu_group
->t
.first_tu
, NULL
, 0, 0,
2951 dw2_get_file_names_reader
, tu_group
);
2954 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
2956 if (this_cu
->v
.quick
->no_file_data
)
2958 return this_cu
->v
.quick
->file_names
;
2961 /* A helper for the "quick" functions which computes and caches the
2962 real path for a given file name from the line table. */
2965 dw2_get_real_path (struct objfile
*objfile
,
2966 struct quick_file_names
*qfn
, int index
)
2968 if (qfn
->real_names
== NULL
)
2969 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
2970 qfn
->num_file_names
, sizeof (char *));
2972 if (qfn
->real_names
[index
] == NULL
)
2973 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]);
2975 return qfn
->real_names
[index
];
2978 static struct symtab
*
2979 dw2_find_last_source_symtab (struct objfile
*objfile
)
2983 dw2_setup (objfile
);
2984 index
= dwarf2_per_objfile
->n_comp_units
- 1;
2985 return dw2_instantiate_symtab (dw2_get_cu (index
));
2988 /* Traversal function for dw2_forget_cached_source_info. */
2991 dw2_free_cached_file_names (void **slot
, void *info
)
2993 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
2995 if (file_data
->real_names
)
2999 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3001 xfree ((void*) file_data
->real_names
[i
]);
3002 file_data
->real_names
[i
] = NULL
;
3010 dw2_forget_cached_source_info (struct objfile
*objfile
)
3012 dw2_setup (objfile
);
3014 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
3015 dw2_free_cached_file_names
, NULL
);
3018 /* Helper function for dw2_map_symtabs_matching_filename that expands
3019 the symtabs and calls the iterator. */
3022 dw2_map_expand_apply (struct objfile
*objfile
,
3023 struct dwarf2_per_cu_data
*per_cu
,
3024 const char *name
, const char *real_path
,
3025 int (*callback
) (struct symtab
*, void *),
3028 struct symtab
*last_made
= objfile
->symtabs
;
3030 /* Don't visit already-expanded CUs. */
3031 if (per_cu
->v
.quick
->symtab
)
3034 /* This may expand more than one symtab, and we want to iterate over
3036 dw2_instantiate_symtab (per_cu
);
3038 return iterate_over_some_symtabs (name
, real_path
, callback
, data
,
3039 objfile
->symtabs
, last_made
);
3042 /* Implementation of the map_symtabs_matching_filename method. */
3045 dw2_map_symtabs_matching_filename (struct objfile
*objfile
, const char *name
,
3046 const char *real_path
,
3047 int (*callback
) (struct symtab
*, void *),
3051 const char *name_basename
= lbasename (name
);
3053 dw2_setup (objfile
);
3055 /* The rule is CUs specify all the files, including those used by
3056 any TU, so there's no need to scan TUs here. */
3058 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3061 struct dwarf2_per_cu_data
*per_cu
= dw2_get_primary_cu (i
);
3062 struct quick_file_names
*file_data
;
3064 /* We only need to look at symtabs not already expanded. */
3065 if (per_cu
->v
.quick
->symtab
)
3068 file_data
= dw2_get_file_names (objfile
, per_cu
);
3069 if (file_data
== NULL
)
3072 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3074 const char *this_name
= file_data
->file_names
[j
];
3075 const char *this_real_name
;
3077 if (compare_filenames_for_search (this_name
, name
))
3079 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3085 /* Before we invoke realpath, which can get expensive when many
3086 files are involved, do a quick comparison of the basenames. */
3087 if (! basenames_may_differ
3088 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3091 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3092 if (compare_filenames_for_search (this_real_name
, name
))
3094 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3100 if (real_path
!= NULL
)
3102 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3103 gdb_assert (IS_ABSOLUTE_PATH (name
));
3104 if (this_real_name
!= NULL
3105 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3107 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3119 /* Struct used to manage iterating over all CUs looking for a symbol. */
3121 struct dw2_symtab_iterator
3123 /* The internalized form of .gdb_index. */
3124 struct mapped_index
*index
;
3125 /* If non-zero, only look for symbols that match BLOCK_INDEX. */
3126 int want_specific_block
;
3127 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
3128 Unused if !WANT_SPECIFIC_BLOCK. */
3130 /* The kind of symbol we're looking for. */
3132 /* The list of CUs from the index entry of the symbol,
3133 or NULL if not found. */
3135 /* The next element in VEC to look at. */
3137 /* The number of elements in VEC, or zero if there is no match. */
3141 /* Initialize the index symtab iterator ITER.
3142 If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols
3143 in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
3146 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3147 struct mapped_index
*index
,
3148 int want_specific_block
,
3153 iter
->index
= index
;
3154 iter
->want_specific_block
= want_specific_block
;
3155 iter
->block_index
= block_index
;
3156 iter
->domain
= domain
;
3159 if (find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3160 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3168 /* Return the next matching CU or NULL if there are no more. */
3170 static struct dwarf2_per_cu_data
*
3171 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3173 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3175 offset_type cu_index_and_attrs
=
3176 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3177 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3178 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (cu_index
);
3179 int want_static
= iter
->block_index
!= GLOBAL_BLOCK
;
3180 /* This value is only valid for index versions >= 7. */
3181 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3182 gdb_index_symbol_kind symbol_kind
=
3183 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3184 /* Only check the symbol attributes if they're present.
3185 Indices prior to version 7 don't record them,
3186 and indices >= 7 may elide them for certain symbols
3187 (gold does this). */
3189 (iter
->index
->version
>= 7
3190 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3192 /* Skip if already read in. */
3193 if (per_cu
->v
.quick
->symtab
)
3197 && iter
->want_specific_block
3198 && want_static
!= is_static
)
3201 /* Only check the symbol's kind if it has one. */
3204 switch (iter
->domain
)
3207 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3208 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3209 /* Some types are also in VAR_DOMAIN. */
3210 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3214 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3218 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3233 static struct symtab
*
3234 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
3235 const char *name
, domain_enum domain
)
3237 struct symtab
*stab_best
= NULL
;
3238 struct mapped_index
*index
;
3240 dw2_setup (objfile
);
3242 index
= dwarf2_per_objfile
->index_table
;
3244 /* index is NULL if OBJF_READNOW. */
3247 struct dw2_symtab_iterator iter
;
3248 struct dwarf2_per_cu_data
*per_cu
;
3250 dw2_symtab_iter_init (&iter
, index
, 1, block_index
, domain
, name
);
3252 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3254 struct symbol
*sym
= NULL
;
3255 struct symtab
*stab
= dw2_instantiate_symtab (per_cu
);
3257 /* Some caution must be observed with overloaded functions
3258 and methods, since the index will not contain any overload
3259 information (but NAME might contain it). */
3262 struct blockvector
*bv
= BLOCKVECTOR (stab
);
3263 struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
3265 sym
= lookup_block_symbol (block
, name
, domain
);
3268 if (sym
&& strcmp_iw (SYMBOL_SEARCH_NAME (sym
), name
) == 0)
3270 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
3276 /* Keep looking through other CUs. */
3284 dw2_print_stats (struct objfile
*objfile
)
3288 dw2_setup (objfile
);
3290 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3291 + dwarf2_per_objfile
->n_type_units
); ++i
)
3293 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3295 if (!per_cu
->v
.quick
->symtab
)
3298 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3302 dw2_dump (struct objfile
*objfile
)
3304 /* Nothing worth printing. */
3308 dw2_relocate (struct objfile
*objfile
, struct section_offsets
*new_offsets
,
3309 struct section_offsets
*delta
)
3311 /* There's nothing to relocate here. */
3315 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
3316 const char *func_name
)
3318 struct mapped_index
*index
;
3320 dw2_setup (objfile
);
3322 index
= dwarf2_per_objfile
->index_table
;
3324 /* index is NULL if OBJF_READNOW. */
3327 struct dw2_symtab_iterator iter
;
3328 struct dwarf2_per_cu_data
*per_cu
;
3330 /* Note: It doesn't matter what we pass for block_index here. */
3331 dw2_symtab_iter_init (&iter
, index
, 0, GLOBAL_BLOCK
, VAR_DOMAIN
,
3334 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3335 dw2_instantiate_symtab (per_cu
);
3340 dw2_expand_all_symtabs (struct objfile
*objfile
)
3344 dw2_setup (objfile
);
3346 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3347 + dwarf2_per_objfile
->n_type_units
); ++i
)
3349 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3351 dw2_instantiate_symtab (per_cu
);
3356 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
3357 const char *fullname
)
3361 dw2_setup (objfile
);
3363 /* We don't need to consider type units here.
3364 This is only called for examining code, e.g. expand_line_sal.
3365 There can be an order of magnitude (or more) more type units
3366 than comp units, and we avoid them if we can. */
3368 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3371 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3372 struct quick_file_names
*file_data
;
3374 /* We only need to look at symtabs not already expanded. */
3375 if (per_cu
->v
.quick
->symtab
)
3378 file_data
= dw2_get_file_names (objfile
, per_cu
);
3379 if (file_data
== NULL
)
3382 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3384 const char *this_fullname
= file_data
->file_names
[j
];
3386 if (filename_cmp (this_fullname
, fullname
) == 0)
3388 dw2_instantiate_symtab (per_cu
);
3395 /* A helper function for dw2_find_symbol_file that finds the primary
3396 file name for a given CU. This is a die_reader_func. */
3399 dw2_get_primary_filename_reader (const struct die_reader_specs
*reader
,
3401 struct die_info
*comp_unit_die
,
3405 const char **result_ptr
= data
;
3406 struct dwarf2_cu
*cu
= reader
->cu
;
3407 struct attribute
*attr
;
3409 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, cu
);
3413 *result_ptr
= DW_STRING (attr
);
3417 dw2_find_symbol_file (struct objfile
*objfile
, const char *name
)
3419 struct dwarf2_per_cu_data
*per_cu
;
3421 const char *filename
;
3423 dw2_setup (objfile
);
3425 /* index_table is NULL if OBJF_READNOW. */
3426 if (!dwarf2_per_objfile
->index_table
)
3430 ALL_OBJFILE_PRIMARY_SYMTABS (objfile
, s
)
3432 struct blockvector
*bv
= BLOCKVECTOR (s
);
3433 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
3434 struct symbol
*sym
= lookup_block_symbol (block
, name
, VAR_DOMAIN
);
3438 /* Only file extension of returned filename is recognized. */
3439 return SYMBOL_SYMTAB (sym
)->filename
;
3445 if (!find_slot_in_mapped_hash (dwarf2_per_objfile
->index_table
,
3449 /* Note that this just looks at the very first one named NAME -- but
3450 actually we are looking for a function. find_main_filename
3451 should be rewritten so that it doesn't require a custom hook. It
3452 could just use the ordinary symbol tables. */
3453 /* vec[0] is the length, which must always be >0. */
3454 per_cu
= dw2_get_cu (GDB_INDEX_CU_VALUE (MAYBE_SWAP (vec
[1])));
3456 if (per_cu
->v
.quick
->symtab
!= NULL
)
3458 /* Only file extension of returned filename is recognized. */
3459 return per_cu
->v
.quick
->symtab
->filename
;
3462 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
3463 dw2_get_primary_filename_reader
, &filename
);
3465 /* Only file extension of returned filename is recognized. */
3470 dw2_map_matching_symbols (const char * name
, domain_enum
namespace,
3471 struct objfile
*objfile
, int global
,
3472 int (*callback
) (struct block
*,
3473 struct symbol
*, void *),
3474 void *data
, symbol_compare_ftype
*match
,
3475 symbol_compare_ftype
*ordered_compare
)
3477 /* Currently unimplemented; used for Ada. The function can be called if the
3478 current language is Ada for a non-Ada objfile using GNU index. As Ada
3479 does not look for non-Ada symbols this function should just return. */
3483 dw2_expand_symtabs_matching
3484 (struct objfile
*objfile
,
3485 int (*file_matcher
) (const char *, void *, int basenames
),
3486 int (*name_matcher
) (const char *, void *),
3487 enum search_domain kind
,
3492 struct mapped_index
*index
;
3494 dw2_setup (objfile
);
3496 /* index_table is NULL if OBJF_READNOW. */
3497 if (!dwarf2_per_objfile
->index_table
)
3499 index
= dwarf2_per_objfile
->index_table
;
3501 if (file_matcher
!= NULL
)
3503 struct cleanup
*cleanup
;
3504 htab_t visited_found
, visited_not_found
;
3506 visited_found
= htab_create_alloc (10,
3507 htab_hash_pointer
, htab_eq_pointer
,
3508 NULL
, xcalloc
, xfree
);
3509 cleanup
= make_cleanup_htab_delete (visited_found
);
3510 visited_not_found
= htab_create_alloc (10,
3511 htab_hash_pointer
, htab_eq_pointer
,
3512 NULL
, xcalloc
, xfree
);
3513 make_cleanup_htab_delete (visited_not_found
);
3515 /* The rule is CUs specify all the files, including those used by
3516 any TU, so there's no need to scan TUs here. */
3518 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3521 struct dwarf2_per_cu_data
*per_cu
= dw2_get_primary_cu (i
);
3522 struct quick_file_names
*file_data
;
3525 per_cu
->v
.quick
->mark
= 0;
3527 /* We only need to look at symtabs not already expanded. */
3528 if (per_cu
->v
.quick
->symtab
)
3531 file_data
= dw2_get_file_names (objfile
, per_cu
);
3532 if (file_data
== NULL
)
3535 if (htab_find (visited_not_found
, file_data
) != NULL
)
3537 else if (htab_find (visited_found
, file_data
) != NULL
)
3539 per_cu
->v
.quick
->mark
= 1;
3543 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3545 const char *this_real_name
;
3547 if (file_matcher (file_data
->file_names
[j
], data
, 0))
3549 per_cu
->v
.quick
->mark
= 1;
3553 /* Before we invoke realpath, which can get expensive when many
3554 files are involved, do a quick comparison of the basenames. */
3555 if (!basenames_may_differ
3556 && !file_matcher (lbasename (file_data
->file_names
[j
]),
3560 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3561 if (file_matcher (this_real_name
, data
, 0))
3563 per_cu
->v
.quick
->mark
= 1;
3568 slot
= htab_find_slot (per_cu
->v
.quick
->mark
3570 : visited_not_found
,
3575 do_cleanups (cleanup
);
3578 for (iter
= 0; iter
< index
->symbol_table_slots
; ++iter
)
3580 offset_type idx
= 2 * iter
;
3582 offset_type
*vec
, vec_len
, vec_idx
;
3584 if (index
->symbol_table
[idx
] == 0 && index
->symbol_table
[idx
+ 1] == 0)
3587 name
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[idx
]);
3589 if (! (*name_matcher
) (name
, data
))
3592 /* The name was matched, now expand corresponding CUs that were
3594 vec
= (offset_type
*) (index
->constant_pool
3595 + MAYBE_SWAP (index
->symbol_table
[idx
+ 1]));
3596 vec_len
= MAYBE_SWAP (vec
[0]);
3597 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
3599 struct dwarf2_per_cu_data
*per_cu
;
3600 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
3601 gdb_index_symbol_kind symbol_kind
=
3602 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3603 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3605 /* Don't crash on bad data. */
3606 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
3607 + dwarf2_per_objfile
->n_type_units
))
3610 /* Only check the symbol's kind if it has one.
3611 Indices prior to version 7 don't record it. */
3612 if (index
->version
>= 7)
3616 case VARIABLES_DOMAIN
:
3617 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
3620 case FUNCTIONS_DOMAIN
:
3621 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
3625 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3633 per_cu
= dw2_get_cu (cu_index
);
3634 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
3635 dw2_instantiate_symtab (per_cu
);
3640 /* A helper for dw2_find_pc_sect_symtab which finds the most specific
3643 static struct symtab
*
3644 recursively_find_pc_sect_symtab (struct symtab
*symtab
, CORE_ADDR pc
)
3648 if (BLOCKVECTOR (symtab
) != NULL
3649 && blockvector_contains_pc (BLOCKVECTOR (symtab
), pc
))
3652 if (symtab
->includes
== NULL
)
3655 for (i
= 0; symtab
->includes
[i
]; ++i
)
3657 struct symtab
*s
= symtab
->includes
[i
];
3659 s
= recursively_find_pc_sect_symtab (s
, pc
);
3667 static struct symtab
*
3668 dw2_find_pc_sect_symtab (struct objfile
*objfile
,
3669 struct minimal_symbol
*msymbol
,
3671 struct obj_section
*section
,
3674 struct dwarf2_per_cu_data
*data
;
3675 struct symtab
*result
;
3677 dw2_setup (objfile
);
3679 if (!objfile
->psymtabs_addrmap
)
3682 data
= addrmap_find (objfile
->psymtabs_addrmap
, pc
);
3686 if (warn_if_readin
&& data
->v
.quick
->symtab
)
3687 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
3688 paddress (get_objfile_arch (objfile
), pc
));
3690 result
= recursively_find_pc_sect_symtab (dw2_instantiate_symtab (data
), pc
);
3691 gdb_assert (result
!= NULL
);
3696 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
3697 void *data
, int need_fullname
)
3700 struct cleanup
*cleanup
;
3701 htab_t visited
= htab_create_alloc (10, htab_hash_pointer
, htab_eq_pointer
,
3702 NULL
, xcalloc
, xfree
);
3704 cleanup
= make_cleanup_htab_delete (visited
);
3705 dw2_setup (objfile
);
3707 /* The rule is CUs specify all the files, including those used by
3708 any TU, so there's no need to scan TUs here.
3709 We can ignore file names coming from already-expanded CUs. */
3711 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3713 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3715 if (per_cu
->v
.quick
->symtab
)
3717 void **slot
= htab_find_slot (visited
, per_cu
->v
.quick
->file_names
,
3720 *slot
= per_cu
->v
.quick
->file_names
;
3724 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3727 struct dwarf2_per_cu_data
*per_cu
= dw2_get_primary_cu (i
);
3728 struct quick_file_names
*file_data
;
3731 /* We only need to look at symtabs not already expanded. */
3732 if (per_cu
->v
.quick
->symtab
)
3735 file_data
= dw2_get_file_names (objfile
, per_cu
);
3736 if (file_data
== NULL
)
3739 slot
= htab_find_slot (visited
, file_data
, INSERT
);
3742 /* Already visited. */
3747 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3749 const char *this_real_name
;
3752 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3754 this_real_name
= NULL
;
3755 (*fun
) (file_data
->file_names
[j
], this_real_name
, data
);
3759 do_cleanups (cleanup
);
3763 dw2_has_symbols (struct objfile
*objfile
)
3768 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
3771 dw2_find_last_source_symtab
,
3772 dw2_forget_cached_source_info
,
3773 dw2_map_symtabs_matching_filename
,
3778 dw2_expand_symtabs_for_function
,
3779 dw2_expand_all_symtabs
,
3780 dw2_expand_symtabs_with_fullname
,
3781 dw2_find_symbol_file
,
3782 dw2_map_matching_symbols
,
3783 dw2_expand_symtabs_matching
,
3784 dw2_find_pc_sect_symtab
,
3785 dw2_map_symbol_filenames
3788 /* Initialize for reading DWARF for this objfile. Return 0 if this
3789 file will use psymtabs, or 1 if using the GNU index. */
3792 dwarf2_initialize_objfile (struct objfile
*objfile
)
3794 /* If we're about to read full symbols, don't bother with the
3795 indices. In this case we also don't care if some other debug
3796 format is making psymtabs, because they are all about to be
3798 if ((objfile
->flags
& OBJF_READNOW
))
3802 dwarf2_per_objfile
->using_index
= 1;
3803 create_all_comp_units (objfile
);
3804 create_all_type_units (objfile
);
3805 dwarf2_per_objfile
->quick_file_names_table
=
3806 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
3808 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3809 + dwarf2_per_objfile
->n_type_units
); ++i
)
3811 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3813 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3814 struct dwarf2_per_cu_quick_data
);
3817 /* Return 1 so that gdb sees the "quick" functions. However,
3818 these functions will be no-ops because we will have expanded
3823 if (dwarf2_read_index (objfile
))
3831 /* Build a partial symbol table. */
3834 dwarf2_build_psymtabs (struct objfile
*objfile
)
3836 volatile struct gdb_exception except
;
3838 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
3840 init_psymbol_list (objfile
, 1024);
3843 TRY_CATCH (except
, RETURN_MASK_ERROR
)
3845 /* This isn't really ideal: all the data we allocate on the
3846 objfile's obstack is still uselessly kept around. However,
3847 freeing it seems unsafe. */
3848 struct cleanup
*cleanups
= make_cleanup_discard_psymtabs (objfile
);
3850 dwarf2_build_psymtabs_hard (objfile
);
3851 discard_cleanups (cleanups
);
3853 if (except
.reason
< 0)
3854 exception_print (gdb_stderr
, except
);
3857 /* Return the total length of the CU described by HEADER. */
3860 get_cu_length (const struct comp_unit_head
*header
)
3862 return header
->initial_length_size
+ header
->length
;
3865 /* Return TRUE if OFFSET is within CU_HEADER. */
3868 offset_in_cu_p (const struct comp_unit_head
*cu_header
, sect_offset offset
)
3870 sect_offset bottom
= { cu_header
->offset
.sect_off
};
3871 sect_offset top
= { cu_header
->offset
.sect_off
+ get_cu_length (cu_header
) };
3873 return (offset
.sect_off
>= bottom
.sect_off
&& offset
.sect_off
< top
.sect_off
);
3876 /* Find the base address of the compilation unit for range lists and
3877 location lists. It will normally be specified by DW_AT_low_pc.
3878 In DWARF-3 draft 4, the base address could be overridden by
3879 DW_AT_entry_pc. It's been removed, but GCC still uses this for
3880 compilation units with discontinuous ranges. */
3883 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
3885 struct attribute
*attr
;
3888 cu
->base_address
= 0;
3890 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
3893 cu
->base_address
= DW_ADDR (attr
);
3898 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
3901 cu
->base_address
= DW_ADDR (attr
);
3907 /* Read in the comp unit header information from the debug_info at info_ptr.
3908 NOTE: This leaves members offset, first_die_offset to be filled in
3912 read_comp_unit_head (struct comp_unit_head
*cu_header
,
3913 gdb_byte
*info_ptr
, bfd
*abfd
)
3916 unsigned int bytes_read
;
3918 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
3919 cu_header
->initial_length_size
= bytes_read
;
3920 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
3921 info_ptr
+= bytes_read
;
3922 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
3924 cu_header
->abbrev_offset
.sect_off
= read_offset (abfd
, info_ptr
, cu_header
,
3926 info_ptr
+= bytes_read
;
3927 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
3929 signed_addr
= bfd_get_sign_extend_vma (abfd
);
3930 if (signed_addr
< 0)
3931 internal_error (__FILE__
, __LINE__
,
3932 _("read_comp_unit_head: dwarf from non elf file"));
3933 cu_header
->signed_addr_p
= signed_addr
;
3938 /* Helper function that returns the proper abbrev section for
3941 static struct dwarf2_section_info
*
3942 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
3944 struct dwarf2_section_info
*abbrev
;
3946 if (this_cu
->is_dwz
)
3947 abbrev
= &dwarf2_get_dwz_file ()->abbrev
;
3949 abbrev
= &dwarf2_per_objfile
->abbrev
;
3954 /* Subroutine of read_and_check_comp_unit_head and
3955 read_and_check_type_unit_head to simplify them.
3956 Perform various error checking on the header. */
3959 error_check_comp_unit_head (struct comp_unit_head
*header
,
3960 struct dwarf2_section_info
*section
,
3961 struct dwarf2_section_info
*abbrev_section
)
3963 bfd
*abfd
= section
->asection
->owner
;
3964 const char *filename
= bfd_get_filename (abfd
);
3966 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
3967 error (_("Dwarf Error: wrong version in compilation unit header "
3968 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
3971 if (header
->abbrev_offset
.sect_off
3972 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
3973 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
3974 "(offset 0x%lx + 6) [in module %s]"),
3975 (long) header
->abbrev_offset
.sect_off
, (long) header
->offset
.sect_off
,
3978 /* Cast to unsigned long to use 64-bit arithmetic when possible to
3979 avoid potential 32-bit overflow. */
3980 if (((unsigned long) header
->offset
.sect_off
+ get_cu_length (header
))
3982 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
3983 "(offset 0x%lx + 0) [in module %s]"),
3984 (long) header
->length
, (long) header
->offset
.sect_off
,
3988 /* Read in a CU/TU header and perform some basic error checking.
3989 The contents of the header are stored in HEADER.
3990 The result is a pointer to the start of the first DIE. */
3993 read_and_check_comp_unit_head (struct comp_unit_head
*header
,
3994 struct dwarf2_section_info
*section
,
3995 struct dwarf2_section_info
*abbrev_section
,
3997 int is_debug_types_section
)
3999 gdb_byte
*beg_of_comp_unit
= info_ptr
;
4000 bfd
*abfd
= section
->asection
->owner
;
4002 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4004 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
4006 /* If we're reading a type unit, skip over the signature and
4007 type_offset fields. */
4008 if (is_debug_types_section
)
4009 info_ptr
+= 8 /*signature*/ + header
->offset_size
;
4011 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4013 error_check_comp_unit_head (header
, section
, abbrev_section
);
4018 /* Read in the types comp unit header information from .debug_types entry at
4019 types_ptr. The result is a pointer to one past the end of the header. */
4022 read_and_check_type_unit_head (struct comp_unit_head
*header
,
4023 struct dwarf2_section_info
*section
,
4024 struct dwarf2_section_info
*abbrev_section
,
4026 ULONGEST
*signature
,
4027 cu_offset
*type_offset_in_tu
)
4029 gdb_byte
*beg_of_comp_unit
= info_ptr
;
4030 bfd
*abfd
= section
->asection
->owner
;
4032 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4034 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
4036 /* If we're reading a type unit, skip over the signature and
4037 type_offset fields. */
4038 if (signature
!= NULL
)
4039 *signature
= read_8_bytes (abfd
, info_ptr
);
4041 if (type_offset_in_tu
!= NULL
)
4042 type_offset_in_tu
->cu_off
= read_offset_1 (abfd
, info_ptr
,
4043 header
->offset_size
);
4044 info_ptr
+= header
->offset_size
;
4046 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4048 error_check_comp_unit_head (header
, section
, abbrev_section
);
4053 /* Fetch the abbreviation table offset from a comp or type unit header. */
4056 read_abbrev_offset (struct dwarf2_section_info
*section
,
4059 bfd
*abfd
= section
->asection
->owner
;
4061 unsigned int length
, initial_length_size
, offset_size
;
4062 sect_offset abbrev_offset
;
4064 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
4065 info_ptr
= section
->buffer
+ offset
.sect_off
;
4066 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
4067 offset_size
= initial_length_size
== 4 ? 4 : 8;
4068 info_ptr
+= initial_length_size
+ 2 /*version*/;
4069 abbrev_offset
.sect_off
= read_offset_1 (abfd
, info_ptr
, offset_size
);
4070 return abbrev_offset
;
4073 /* Allocate a new partial symtab for file named NAME and mark this new
4074 partial symtab as being an include of PST. */
4077 dwarf2_create_include_psymtab (char *name
, struct partial_symtab
*pst
,
4078 struct objfile
*objfile
)
4080 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
4082 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
4084 /* It shares objfile->objfile_obstack. */
4085 subpst
->dirname
= pst
->dirname
;
4088 subpst
->section_offsets
= pst
->section_offsets
;
4089 subpst
->textlow
= 0;
4090 subpst
->texthigh
= 0;
4092 subpst
->dependencies
= (struct partial_symtab
**)
4093 obstack_alloc (&objfile
->objfile_obstack
,
4094 sizeof (struct partial_symtab
*));
4095 subpst
->dependencies
[0] = pst
;
4096 subpst
->number_of_dependencies
= 1;
4098 subpst
->globals_offset
= 0;
4099 subpst
->n_global_syms
= 0;
4100 subpst
->statics_offset
= 0;
4101 subpst
->n_static_syms
= 0;
4102 subpst
->symtab
= NULL
;
4103 subpst
->read_symtab
= pst
->read_symtab
;
4106 /* No private part is necessary for include psymtabs. This property
4107 can be used to differentiate between such include psymtabs and
4108 the regular ones. */
4109 subpst
->read_symtab_private
= NULL
;
4112 /* Read the Line Number Program data and extract the list of files
4113 included by the source file represented by PST. Build an include
4114 partial symtab for each of these included files. */
4117 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
4118 struct die_info
*die
,
4119 struct partial_symtab
*pst
)
4121 struct line_header
*lh
= NULL
;
4122 struct attribute
*attr
;
4124 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
4126 lh
= dwarf_decode_line_header (DW_UNSND (attr
), cu
);
4128 return; /* No linetable, so no includes. */
4130 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
4131 dwarf_decode_lines (lh
, pst
->dirname
, cu
, pst
, 1);
4133 free_line_header (lh
);
4137 hash_signatured_type (const void *item
)
4139 const struct signatured_type
*sig_type
= item
;
4141 /* This drops the top 32 bits of the signature, but is ok for a hash. */
4142 return sig_type
->signature
;
4146 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
4148 const struct signatured_type
*lhs
= item_lhs
;
4149 const struct signatured_type
*rhs
= item_rhs
;
4151 return lhs
->signature
== rhs
->signature
;
4154 /* Allocate a hash table for signatured types. */
4157 allocate_signatured_type_table (struct objfile
*objfile
)
4159 return htab_create_alloc_ex (41,
4160 hash_signatured_type
,
4163 &objfile
->objfile_obstack
,
4164 hashtab_obstack_allocate
,
4165 dummy_obstack_deallocate
);
4168 /* A helper function to add a signatured type CU to a table. */
4171 add_signatured_type_cu_to_table (void **slot
, void *datum
)
4173 struct signatured_type
*sigt
= *slot
;
4174 struct signatured_type
***datap
= datum
;
4182 /* Create the hash table of all entries in the .debug_types section.
4183 DWO_FILE is a pointer to the DWO file for .debug_types.dwo,
4185 Note: This function processes DWO files only, not DWP files.
4186 The result is a pointer to the hash table or NULL if there are
4190 create_debug_types_hash_table (struct dwo_file
*dwo_file
,
4191 VEC (dwarf2_section_info_def
) *types
)
4193 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4194 htab_t types_htab
= NULL
;
4196 struct dwarf2_section_info
*section
;
4197 struct dwarf2_section_info
*abbrev_section
;
4199 if (VEC_empty (dwarf2_section_info_def
, types
))
4202 abbrev_section
= (dwo_file
!= NULL
4203 ? &dwo_file
->sections
.abbrev
4204 : &dwarf2_per_objfile
->abbrev
);
4206 if (dwarf2_read_debug
)
4207 fprintf_unfiltered (gdb_stdlog
, "Reading .debug_types%s for %s:\n",
4208 dwo_file
? ".dwo" : "",
4209 bfd_get_filename (abbrev_section
->asection
->owner
));
4212 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
4216 gdb_byte
*info_ptr
, *end_ptr
;
4217 struct dwarf2_section_info
*abbrev_section
;
4219 dwarf2_read_section (objfile
, section
);
4220 info_ptr
= section
->buffer
;
4222 if (info_ptr
== NULL
)
4225 /* We can't set abfd until now because the section may be empty or
4226 not present, in which case section->asection will be NULL. */
4227 abfd
= section
->asection
->owner
;
4230 abbrev_section
= &dwo_file
->sections
.abbrev
;
4232 abbrev_section
= &dwarf2_per_objfile
->abbrev
;
4234 if (types_htab
== NULL
)
4237 types_htab
= allocate_dwo_unit_table (objfile
);
4239 types_htab
= allocate_signatured_type_table (objfile
);
4242 /* We don't use init_cutu_and_read_dies_simple, or some such, here
4243 because we don't need to read any dies: the signature is in the
4246 end_ptr
= info_ptr
+ section
->size
;
4247 while (info_ptr
< end_ptr
)
4250 cu_offset type_offset_in_tu
;
4252 struct signatured_type
*sig_type
;
4253 struct dwo_unit
*dwo_tu
;
4255 gdb_byte
*ptr
= info_ptr
;
4256 struct comp_unit_head header
;
4257 unsigned int length
;
4259 offset
.sect_off
= ptr
- section
->buffer
;
4261 /* We need to read the type's signature in order to build the hash
4262 table, but we don't need anything else just yet. */
4264 ptr
= read_and_check_type_unit_head (&header
, section
,
4265 abbrev_section
, ptr
,
4266 &signature
, &type_offset_in_tu
);
4268 length
= get_cu_length (&header
);
4270 /* Skip dummy type units. */
4271 if (ptr
>= info_ptr
+ length
4272 || peek_abbrev_code (abfd
, ptr
) == 0)
4281 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4283 dwo_tu
->dwo_file
= dwo_file
;
4284 dwo_tu
->signature
= signature
;
4285 dwo_tu
->type_offset_in_tu
= type_offset_in_tu
;
4286 dwo_tu
->info_or_types_section
= section
;
4287 dwo_tu
->offset
= offset
;
4288 dwo_tu
->length
= length
;
4292 /* N.B.: type_offset is not usable if this type uses a DWO file.
4293 The real type_offset is in the DWO file. */
4295 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4296 struct signatured_type
);
4297 sig_type
->signature
= signature
;
4298 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
4299 sig_type
->per_cu
.objfile
= objfile
;
4300 sig_type
->per_cu
.is_debug_types
= 1;
4301 sig_type
->per_cu
.info_or_types_section
= section
;
4302 sig_type
->per_cu
.offset
= offset
;
4303 sig_type
->per_cu
.length
= length
;
4306 slot
= htab_find_slot (types_htab
,
4307 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
4309 gdb_assert (slot
!= NULL
);
4312 sect_offset dup_offset
;
4316 const struct dwo_unit
*dup_tu
= *slot
;
4318 dup_offset
= dup_tu
->offset
;
4322 const struct signatured_type
*dup_tu
= *slot
;
4324 dup_offset
= dup_tu
->per_cu
.offset
;
4327 complaint (&symfile_complaints
,
4328 _("debug type entry at offset 0x%x is duplicate to the "
4329 "entry at offset 0x%x, signature 0x%s"),
4330 offset
.sect_off
, dup_offset
.sect_off
,
4331 phex (signature
, sizeof (signature
)));
4333 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
4335 if (dwarf2_read_debug
)
4336 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature 0x%s\n",
4338 phex (signature
, sizeof (signature
)));
4347 /* Create the hash table of all entries in the .debug_types section,
4348 and initialize all_type_units.
4349 The result is zero if there is an error (e.g. missing .debug_types section),
4350 otherwise non-zero. */
4353 create_all_type_units (struct objfile
*objfile
)
4356 struct signatured_type
**iter
;
4358 types_htab
= create_debug_types_hash_table (NULL
, dwarf2_per_objfile
->types
);
4359 if (types_htab
== NULL
)
4361 dwarf2_per_objfile
->signatured_types
= NULL
;
4365 dwarf2_per_objfile
->signatured_types
= types_htab
;
4367 dwarf2_per_objfile
->n_type_units
= htab_elements (types_htab
);
4368 dwarf2_per_objfile
->all_type_units
4369 = obstack_alloc (&objfile
->objfile_obstack
,
4370 dwarf2_per_objfile
->n_type_units
4371 * sizeof (struct signatured_type
*));
4372 iter
= &dwarf2_per_objfile
->all_type_units
[0];
4373 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
4374 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
4375 == dwarf2_per_objfile
->n_type_units
);
4380 /* Lookup a signature based type for DW_FORM_ref_sig8.
4381 Returns NULL if signature SIG is not present in the table. */
4383 static struct signatured_type
*
4384 lookup_signatured_type (ULONGEST sig
)
4386 struct signatured_type find_entry
, *entry
;
4388 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4390 complaint (&symfile_complaints
,
4391 _("missing `.debug_types' section for DW_FORM_ref_sig8 die"));
4395 find_entry
.signature
= sig
;
4396 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
4400 /* Low level DIE reading support. */
4402 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
4405 init_cu_die_reader (struct die_reader_specs
*reader
,
4406 struct dwarf2_cu
*cu
,
4407 struct dwarf2_section_info
*section
,
4408 struct dwo_file
*dwo_file
)
4410 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
4411 reader
->abfd
= section
->asection
->owner
;
4413 reader
->dwo_file
= dwo_file
;
4414 reader
->die_section
= section
;
4415 reader
->buffer
= section
->buffer
;
4416 reader
->buffer_end
= section
->buffer
+ section
->size
;
4419 /* Initialize a CU (or TU) and read its DIEs.
4420 If the CU defers to a DWO file, read the DWO file as well.
4422 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
4423 Otherwise the table specified in the comp unit header is read in and used.
4424 This is an optimization for when we already have the abbrev table.
4426 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
4427 Otherwise, a new CU is allocated with xmalloc.
4429 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
4430 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
4432 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
4433 linker) then DIE_READER_FUNC will not get called. */
4436 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
4437 struct abbrev_table
*abbrev_table
,
4438 int use_existing_cu
, int keep
,
4439 die_reader_func_ftype
*die_reader_func
,
4442 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4443 struct dwarf2_section_info
*section
= this_cu
->info_or_types_section
;
4444 bfd
*abfd
= section
->asection
->owner
;
4445 struct dwarf2_cu
*cu
;
4446 gdb_byte
*begin_info_ptr
, *info_ptr
;
4447 struct die_reader_specs reader
;
4448 struct die_info
*comp_unit_die
;
4450 struct attribute
*attr
;
4451 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
4452 struct signatured_type
*sig_type
= NULL
;
4453 struct dwarf2_section_info
*abbrev_section
;
4454 /* Non-zero if CU currently points to a DWO file and we need to
4455 reread it. When this happens we need to reread the skeleton die
4456 before we can reread the DWO file. */
4457 int rereading_dwo_cu
= 0;
4459 if (dwarf2_die_debug
)
4460 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
4461 this_cu
->is_debug_types
? "type" : "comp",
4462 this_cu
->offset
.sect_off
);
4464 if (use_existing_cu
)
4467 cleanups
= make_cleanup (null_cleanup
, NULL
);
4469 /* This is cheap if the section is already read in. */
4470 dwarf2_read_section (objfile
, section
);
4472 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
4474 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
4476 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
4480 /* If this CU is from a DWO file we need to start over, we need to
4481 refetch the attributes from the skeleton CU.
4482 This could be optimized by retrieving those attributes from when we
4483 were here the first time: the previous comp_unit_die was stored in
4484 comp_unit_obstack. But there's no data yet that we need this
4486 if (cu
->dwo_unit
!= NULL
)
4487 rereading_dwo_cu
= 1;
4491 /* If !use_existing_cu, this_cu->cu must be NULL. */
4492 gdb_assert (this_cu
->cu
== NULL
);
4494 cu
= xmalloc (sizeof (*cu
));
4495 init_one_comp_unit (cu
, this_cu
);
4497 /* If an error occurs while loading, release our storage. */
4498 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
4501 if (cu
->header
.first_die_offset
.cu_off
!= 0 && ! rereading_dwo_cu
)
4503 /* We already have the header, there's no need to read it in again. */
4504 info_ptr
+= cu
->header
.first_die_offset
.cu_off
;
4508 if (this_cu
->is_debug_types
)
4511 cu_offset type_offset_in_tu
;
4513 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
4514 abbrev_section
, info_ptr
,
4516 &type_offset_in_tu
);
4518 /* Since per_cu is the first member of struct signatured_type,
4519 we can go from a pointer to one to a pointer to the other. */
4520 sig_type
= (struct signatured_type
*) this_cu
;
4521 gdb_assert (sig_type
->signature
== signature
);
4522 gdb_assert (sig_type
->type_offset_in_tu
.cu_off
4523 == type_offset_in_tu
.cu_off
);
4524 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
4526 /* LENGTH has not been set yet for type units if we're
4527 using .gdb_index. */
4528 this_cu
->length
= get_cu_length (&cu
->header
);
4530 /* Establish the type offset that can be used to lookup the type. */
4531 sig_type
->type_offset_in_section
.sect_off
=
4532 this_cu
->offset
.sect_off
+ sig_type
->type_offset_in_tu
.cu_off
;
4536 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
4540 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
4541 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
4545 /* Skip dummy compilation units. */
4546 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
4547 || peek_abbrev_code (abfd
, info_ptr
) == 0)
4549 do_cleanups (cleanups
);
4553 /* If we don't have them yet, read the abbrevs for this compilation unit.
4554 And if we need to read them now, make sure they're freed when we're
4555 done. Note that it's important that if the CU had an abbrev table
4556 on entry we don't free it when we're done: Somewhere up the call stack
4557 it may be in use. */
4558 if (abbrev_table
!= NULL
)
4560 gdb_assert (cu
->abbrev_table
== NULL
);
4561 gdb_assert (cu
->header
.abbrev_offset
.sect_off
4562 == abbrev_table
->offset
.sect_off
);
4563 cu
->abbrev_table
= abbrev_table
;
4565 else if (cu
->abbrev_table
== NULL
)
4567 dwarf2_read_abbrevs (cu
, abbrev_section
);
4568 make_cleanup (dwarf2_free_abbrev_table
, cu
);
4570 else if (rereading_dwo_cu
)
4572 dwarf2_free_abbrev_table (cu
);
4573 dwarf2_read_abbrevs (cu
, abbrev_section
);
4576 /* Read the top level CU/TU die. */
4577 init_cu_die_reader (&reader
, cu
, section
, NULL
);
4578 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
4580 /* If we have a DWO stub, process it and then read in the DWO file.
4581 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains
4582 a DWO CU, that this test will fail. */
4583 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
4586 const char *dwo_name
= DW_STRING (attr
);
4587 const char *comp_dir_string
;
4588 struct dwo_unit
*dwo_unit
;
4589 ULONGEST signature
; /* Or dwo_id. */
4590 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
4591 int i
,num_extra_attrs
;
4592 struct dwarf2_section_info
*dwo_abbrev_section
;
4595 error (_("Dwarf Error: compilation unit with DW_AT_GNU_dwo_name"
4596 " has children (offset 0x%x) [in module %s]"),
4597 this_cu
->offset
.sect_off
, bfd_get_filename (abfd
));
4599 /* These attributes aren't processed until later:
4600 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
4601 However, the attribute is found in the stub which we won't have later.
4602 In order to not impose this complication on the rest of the code,
4603 we read them here and copy them to the DWO CU/TU die. */
4605 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
4608 if (! this_cu
->is_debug_types
)
4609 stmt_list
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
4610 low_pc
= dwarf2_attr (comp_unit_die
, DW_AT_low_pc
, cu
);
4611 high_pc
= dwarf2_attr (comp_unit_die
, DW_AT_high_pc
, cu
);
4612 ranges
= dwarf2_attr (comp_unit_die
, DW_AT_ranges
, cu
);
4613 comp_dir
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
4615 /* There should be a DW_AT_addr_base attribute here (if needed).
4616 We need the value before we can process DW_FORM_GNU_addr_index. */
4618 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
4620 cu
->addr_base
= DW_UNSND (attr
);
4622 /* There should be a DW_AT_ranges_base attribute here (if needed).
4623 We need the value before we can process DW_AT_ranges. */
4624 cu
->ranges_base
= 0;
4625 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
4627 cu
->ranges_base
= DW_UNSND (attr
);
4629 if (this_cu
->is_debug_types
)
4631 gdb_assert (sig_type
!= NULL
);
4632 signature
= sig_type
->signature
;
4636 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
4638 error (_("Dwarf Error: missing dwo_id [in module %s]"),
4640 signature
= DW_UNSND (attr
);
4643 /* We may need the comp_dir in order to find the DWO file. */
4644 comp_dir_string
= NULL
;
4646 comp_dir_string
= DW_STRING (comp_dir
);
4648 if (this_cu
->is_debug_types
)
4649 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir_string
);
4651 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir_string
,
4654 if (dwo_unit
== NULL
)
4656 error (_("Dwarf Error: CU at offset 0x%x references unknown DWO"
4657 " with ID %s [in module %s]"),
4658 this_cu
->offset
.sect_off
,
4659 phex (signature
, sizeof (signature
)),
4663 /* Set up for reading the DWO CU/TU. */
4664 cu
->dwo_unit
= dwo_unit
;
4665 section
= dwo_unit
->info_or_types_section
;
4666 dwarf2_read_section (objfile
, section
);
4667 begin_info_ptr
= info_ptr
= section
->buffer
+ dwo_unit
->offset
.sect_off
;
4668 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
4669 init_cu_die_reader (&reader
, cu
, section
, dwo_unit
->dwo_file
);
4671 if (this_cu
->is_debug_types
)
4674 cu_offset type_offset_in_tu
;
4676 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
4680 &type_offset_in_tu
);
4681 gdb_assert (sig_type
->signature
== signature
);
4682 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
4683 /* For DWOs coming from DWP files, we don't know the CU length
4684 nor the type's offset in the TU until now. */
4685 dwo_unit
->length
= get_cu_length (&cu
->header
);
4686 dwo_unit
->type_offset_in_tu
= type_offset_in_tu
;
4688 /* Establish the type offset that can be used to lookup the type.
4689 For DWO files, we don't know it until now. */
4690 sig_type
->type_offset_in_section
.sect_off
=
4691 dwo_unit
->offset
.sect_off
+ dwo_unit
->type_offset_in_tu
.cu_off
;
4695 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
4698 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
4699 /* For DWOs coming from DWP files, we don't know the CU length
4701 dwo_unit
->length
= get_cu_length (&cu
->header
);
4704 /* Discard the original CU's abbrev table, and read the DWO's. */
4705 if (abbrev_table
== NULL
)
4707 dwarf2_free_abbrev_table (cu
);
4708 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
4712 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
4713 make_cleanup (dwarf2_free_abbrev_table
, cu
);
4716 /* Read in the die, but leave space to copy over the attributes
4717 from the stub. This has the benefit of simplifying the rest of
4718 the code - all the real work is done here. */
4719 num_extra_attrs
= ((stmt_list
!= NULL
)
4723 + (comp_dir
!= NULL
));
4724 info_ptr
= read_full_die_1 (&reader
, &comp_unit_die
, info_ptr
,
4725 &has_children
, num_extra_attrs
);
4727 /* Copy over the attributes from the stub to the DWO die. */
4728 i
= comp_unit_die
->num_attrs
;
4729 if (stmt_list
!= NULL
)
4730 comp_unit_die
->attrs
[i
++] = *stmt_list
;
4732 comp_unit_die
->attrs
[i
++] = *low_pc
;
4733 if (high_pc
!= NULL
)
4734 comp_unit_die
->attrs
[i
++] = *high_pc
;
4736 comp_unit_die
->attrs
[i
++] = *ranges
;
4737 if (comp_dir
!= NULL
)
4738 comp_unit_die
->attrs
[i
++] = *comp_dir
;
4739 comp_unit_die
->num_attrs
+= num_extra_attrs
;
4741 /* Skip dummy compilation units. */
4742 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
4743 || peek_abbrev_code (abfd
, info_ptr
) == 0)
4745 do_cleanups (cleanups
);
4750 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
4752 if (free_cu_cleanup
!= NULL
)
4756 /* We've successfully allocated this compilation unit. Let our
4757 caller clean it up when finished with it. */
4758 discard_cleanups (free_cu_cleanup
);
4760 /* We can only discard free_cu_cleanup and all subsequent cleanups.
4761 So we have to manually free the abbrev table. */
4762 dwarf2_free_abbrev_table (cu
);
4764 /* Link this CU into read_in_chain. */
4765 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
4766 dwarf2_per_objfile
->read_in_chain
= this_cu
;
4769 do_cleanups (free_cu_cleanup
);
4772 do_cleanups (cleanups
);
4775 /* Read CU/TU THIS_CU in section SECTION,
4776 but do not follow DW_AT_GNU_dwo_name if present.
4777 DWOP_FILE, if non-NULL, is the DWO/DWP file to read (the caller is assumed
4778 to have already done the lookup to find the DWO/DWP file).
4780 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
4781 THIS_CU->is_debug_types, but nothing else.
4783 We fill in THIS_CU->length.
4785 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
4786 linker) then DIE_READER_FUNC will not get called.
4788 THIS_CU->cu is always freed when done.
4789 This is done in order to not leave THIS_CU->cu in a state where we have
4790 to care whether it refers to the "main" CU or the DWO CU. */
4793 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
4794 struct dwarf2_section_info
*abbrev_section
,
4795 struct dwo_file
*dwo_file
,
4796 die_reader_func_ftype
*die_reader_func
,
4799 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4800 struct dwarf2_section_info
*section
= this_cu
->info_or_types_section
;
4801 bfd
*abfd
= section
->asection
->owner
;
4802 struct dwarf2_cu cu
;
4803 gdb_byte
*begin_info_ptr
, *info_ptr
;
4804 struct die_reader_specs reader
;
4805 struct cleanup
*cleanups
;
4806 struct die_info
*comp_unit_die
;
4809 if (dwarf2_die_debug
)
4810 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
4811 this_cu
->is_debug_types
? "type" : "comp",
4812 this_cu
->offset
.sect_off
);
4814 gdb_assert (this_cu
->cu
== NULL
);
4816 /* This is cheap if the section is already read in. */
4817 dwarf2_read_section (objfile
, section
);
4819 init_one_comp_unit (&cu
, this_cu
);
4821 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
4823 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
4824 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, section
,
4825 abbrev_section
, info_ptr
,
4826 this_cu
->is_debug_types
);
4828 this_cu
->length
= get_cu_length (&cu
.header
);
4830 /* Skip dummy compilation units. */
4831 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
4832 || peek_abbrev_code (abfd
, info_ptr
) == 0)
4834 do_cleanups (cleanups
);
4838 dwarf2_read_abbrevs (&cu
, abbrev_section
);
4839 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
4841 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
);
4842 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
4844 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
4846 do_cleanups (cleanups
);
4849 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
4850 does not lookup the specified DWO file.
4851 This cannot be used to read DWO files.
4853 THIS_CU->cu is always freed when done.
4854 This is done in order to not leave THIS_CU->cu in a state where we have
4855 to care whether it refers to the "main" CU or the DWO CU.
4856 We can revisit this if the data shows there's a performance issue. */
4859 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
4860 die_reader_func_ftype
*die_reader_func
,
4863 init_cutu_and_read_dies_no_follow (this_cu
,
4864 get_abbrev_section_for_cu (this_cu
),
4866 die_reader_func
, data
);
4869 /* Create a psymtab named NAME and assign it to PER_CU.
4871 The caller must fill in the following details:
4872 dirname, textlow, texthigh. */
4874 static struct partial_symtab
*
4875 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
4877 struct objfile
*objfile
= per_cu
->objfile
;
4878 struct partial_symtab
*pst
;
4880 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
4882 objfile
->global_psymbols
.next
,
4883 objfile
->static_psymbols
.next
);
4885 pst
->psymtabs_addrmap_supported
= 1;
4887 /* This is the glue that links PST into GDB's symbol API. */
4888 pst
->read_symtab_private
= per_cu
;
4889 pst
->read_symtab
= dwarf2_read_symtab
;
4890 per_cu
->v
.psymtab
= pst
;
4895 /* die_reader_func for process_psymtab_comp_unit. */
4898 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
4900 struct die_info
*comp_unit_die
,
4904 struct dwarf2_cu
*cu
= reader
->cu
;
4905 struct objfile
*objfile
= cu
->objfile
;
4906 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
4907 struct attribute
*attr
;
4909 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
4910 struct partial_symtab
*pst
;
4912 const char *filename
;
4913 int *want_partial_unit_ptr
= data
;
4915 if (comp_unit_die
->tag
== DW_TAG_partial_unit
4916 && (want_partial_unit_ptr
== NULL
4917 || !*want_partial_unit_ptr
))
4920 gdb_assert (! per_cu
->is_debug_types
);
4922 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
4924 cu
->list_in_scope
= &file_symbols
;
4926 /* Allocate a new partial symbol table structure. */
4927 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, cu
);
4928 if (attr
== NULL
|| !DW_STRING (attr
))
4931 filename
= DW_STRING (attr
);
4933 pst
= create_partial_symtab (per_cu
, filename
);
4935 /* This must be done before calling dwarf2_build_include_psymtabs. */
4936 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
4938 pst
->dirname
= DW_STRING (attr
);
4940 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4942 dwarf2_find_base_address (comp_unit_die
, cu
);
4944 /* Possibly set the default values of LOWPC and HIGHPC from
4946 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
4947 &best_highpc
, cu
, pst
);
4948 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
4949 /* Store the contiguous range if it is not empty; it can be empty for
4950 CUs with no code. */
4951 addrmap_set_empty (objfile
->psymtabs_addrmap
,
4952 best_lowpc
+ baseaddr
,
4953 best_highpc
+ baseaddr
- 1, pst
);
4955 /* Check if comp unit has_children.
4956 If so, read the rest of the partial symbols from this comp unit.
4957 If not, there's no more debug_info for this comp unit. */
4960 struct partial_die_info
*first_die
;
4961 CORE_ADDR lowpc
, highpc
;
4963 lowpc
= ((CORE_ADDR
) -1);
4964 highpc
= ((CORE_ADDR
) 0);
4966 first_die
= load_partial_dies (reader
, info_ptr
, 1);
4968 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
4971 /* If we didn't find a lowpc, set it to highpc to avoid
4972 complaints from `maint check'. */
4973 if (lowpc
== ((CORE_ADDR
) -1))
4976 /* If the compilation unit didn't have an explicit address range,
4977 then use the information extracted from its child dies. */
4981 best_highpc
= highpc
;
4984 pst
->textlow
= best_lowpc
+ baseaddr
;
4985 pst
->texthigh
= best_highpc
+ baseaddr
;
4987 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
4988 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
4989 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
4990 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
4991 sort_pst_symbols (objfile
, pst
);
4993 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
4996 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
4997 struct dwarf2_per_cu_data
*iter
;
4999 /* Fill in 'dependencies' here; we fill in 'users' in a
5001 pst
->number_of_dependencies
= len
;
5002 pst
->dependencies
= obstack_alloc (&objfile
->objfile_obstack
,
5003 len
* sizeof (struct symtab
*));
5005 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
5008 pst
->dependencies
[i
] = iter
->v
.psymtab
;
5010 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
5013 /* Get the list of files included in the current compilation unit,
5014 and build a psymtab for each of them. */
5015 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
5017 if (dwarf2_read_debug
)
5019 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
5021 fprintf_unfiltered (gdb_stdlog
,
5022 "Psymtab for %s unit @0x%x: %s - %s"
5023 ", %d global, %d static syms\n",
5024 per_cu
->is_debug_types
? "type" : "comp",
5025 per_cu
->offset
.sect_off
,
5026 paddress (gdbarch
, pst
->textlow
),
5027 paddress (gdbarch
, pst
->texthigh
),
5028 pst
->n_global_syms
, pst
->n_static_syms
);
5032 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
5033 Process compilation unit THIS_CU for a psymtab. */
5036 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
5037 int want_partial_unit
)
5039 /* If this compilation unit was already read in, free the
5040 cached copy in order to read it in again. This is
5041 necessary because we skipped some symbols when we first
5042 read in the compilation unit (see load_partial_dies).
5043 This problem could be avoided, but the benefit is unclear. */
5044 if (this_cu
->cu
!= NULL
)
5045 free_one_cached_comp_unit (this_cu
);
5047 gdb_assert (! this_cu
->is_debug_types
);
5048 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0,
5049 process_psymtab_comp_unit_reader
,
5050 &want_partial_unit
);
5052 /* Age out any secondary CUs. */
5053 age_cached_comp_units ();
5057 hash_type_unit_group (const void *item
)
5059 const struct type_unit_group
*tu_group
= item
;
5061 return hash_stmt_list_entry (&tu_group
->hash
);
5065 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
5067 const struct type_unit_group
*lhs
= item_lhs
;
5068 const struct type_unit_group
*rhs
= item_rhs
;
5070 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
5073 /* Allocate a hash table for type unit groups. */
5076 allocate_type_unit_groups_table (void)
5078 return htab_create_alloc_ex (3,
5079 hash_type_unit_group
,
5082 &dwarf2_per_objfile
->objfile
->objfile_obstack
,
5083 hashtab_obstack_allocate
,
5084 dummy_obstack_deallocate
);
5087 /* Type units that don't have DW_AT_stmt_list are grouped into their own
5088 partial symtabs. We combine several TUs per psymtab to not let the size
5089 of any one psymtab grow too big. */
5090 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
5091 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
5093 /* Helper routine for get_type_unit_group.
5094 Create the type_unit_group object used to hold one or more TUs. */
5096 static struct type_unit_group
*
5097 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
5099 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5100 struct dwarf2_per_cu_data
*per_cu
;
5101 struct type_unit_group
*tu_group
;
5103 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5104 struct type_unit_group
);
5105 per_cu
= &tu_group
->per_cu
;
5106 per_cu
->objfile
= objfile
;
5107 per_cu
->is_debug_types
= 1;
5108 per_cu
->type_unit_group
= tu_group
;
5110 if (dwarf2_per_objfile
->using_index
)
5112 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5113 struct dwarf2_per_cu_quick_data
);
5114 tu_group
->t
.first_tu
= cu
->per_cu
;
5118 unsigned int line_offset
= line_offset_struct
.sect_off
;
5119 struct partial_symtab
*pst
;
5122 /* Give the symtab a useful name for debug purposes. */
5123 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
5124 name
= xstrprintf ("<type_units_%d>",
5125 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
5127 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
5129 pst
= create_partial_symtab (per_cu
, name
);
5135 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
5136 tu_group
->hash
.line_offset
= line_offset_struct
;
5141 /* Look up the type_unit_group for type unit CU, and create it if necessary.
5142 STMT_LIST is a DW_AT_stmt_list attribute. */
5144 static struct type_unit_group
*
5145 get_type_unit_group (struct dwarf2_cu
*cu
, struct attribute
*stmt_list
)
5147 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
5148 struct type_unit_group
*tu_group
;
5150 unsigned int line_offset
;
5151 struct type_unit_group type_unit_group_for_lookup
;
5153 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
5155 dwarf2_per_objfile
->type_unit_groups
=
5156 allocate_type_unit_groups_table ();
5159 /* Do we need to create a new group, or can we use an existing one? */
5163 line_offset
= DW_UNSND (stmt_list
);
5164 ++tu_stats
->nr_symtab_sharers
;
5168 /* Ugh, no stmt_list. Rare, but we have to handle it.
5169 We can do various things here like create one group per TU or
5170 spread them over multiple groups to split up the expansion work.
5171 To avoid worst case scenarios (too many groups or too large groups)
5172 we, umm, group them in bunches. */
5173 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
5174 | (tu_stats
->nr_stmt_less_type_units
5175 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
5176 ++tu_stats
->nr_stmt_less_type_units
;
5179 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
5180 type_unit_group_for_lookup
.hash
.line_offset
.sect_off
= line_offset
;
5181 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
5182 &type_unit_group_for_lookup
, INSERT
);
5186 gdb_assert (tu_group
!= NULL
);
5190 sect_offset line_offset_struct
;
5192 line_offset_struct
.sect_off
= line_offset
;
5193 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
5195 ++tu_stats
->nr_symtabs
;
5201 /* Struct used to sort TUs by their abbreviation table offset. */
5203 struct tu_abbrev_offset
5205 struct signatured_type
*sig_type
;
5206 sect_offset abbrev_offset
;
5209 /* Helper routine for build_type_unit_groups, passed to qsort. */
5212 sort_tu_by_abbrev_offset (const void *ap
, const void *bp
)
5214 const struct tu_abbrev_offset
* const *a
= ap
;
5215 const struct tu_abbrev_offset
* const *b
= bp
;
5216 unsigned int aoff
= (*a
)->abbrev_offset
.sect_off
;
5217 unsigned int boff
= (*b
)->abbrev_offset
.sect_off
;
5219 return (aoff
> boff
) - (aoff
< boff
);
5222 /* A helper function to add a type_unit_group to a table. */
5225 add_type_unit_group_to_table (void **slot
, void *datum
)
5227 struct type_unit_group
*tu_group
= *slot
;
5228 struct type_unit_group
***datap
= datum
;
5236 /* Efficiently read all the type units, calling init_cutu_and_read_dies on
5237 each one passing FUNC,DATA.
5239 The efficiency is because we sort TUs by the abbrev table they use and
5240 only read each abbrev table once. In one program there are 200K TUs
5241 sharing 8K abbrev tables.
5243 The main purpose of this function is to support building the
5244 dwarf2_per_objfile->type_unit_groups table.
5245 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
5246 can collapse the search space by grouping them by stmt_list.
5247 The savings can be significant, in the same program from above the 200K TUs
5248 share 8K stmt_list tables.
5250 FUNC is expected to call get_type_unit_group, which will create the
5251 struct type_unit_group if necessary and add it to
5252 dwarf2_per_objfile->type_unit_groups. */
5255 build_type_unit_groups (die_reader_func_ftype
*func
, void *data
)
5257 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5258 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
5259 struct cleanup
*cleanups
;
5260 struct abbrev_table
*abbrev_table
;
5261 sect_offset abbrev_offset
;
5262 struct tu_abbrev_offset
*sorted_by_abbrev
;
5263 struct type_unit_group
**iter
;
5266 /* It's up to the caller to not call us multiple times. */
5267 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
5269 if (dwarf2_per_objfile
->n_type_units
== 0)
5272 /* TUs typically share abbrev tables, and there can be way more TUs than
5273 abbrev tables. Sort by abbrev table to reduce the number of times we
5274 read each abbrev table in.
5275 Alternatives are to punt or to maintain a cache of abbrev tables.
5276 This is simpler and efficient enough for now.
5278 Later we group TUs by their DW_AT_stmt_list value (as this defines the
5279 symtab to use). Typically TUs with the same abbrev offset have the same
5280 stmt_list value too so in practice this should work well.
5282 The basic algorithm here is:
5284 sort TUs by abbrev table
5285 for each TU with same abbrev table:
5286 read abbrev table if first user
5287 read TU top level DIE
5288 [IWBN if DWO skeletons had DW_AT_stmt_list]
5291 if (dwarf2_read_debug
)
5292 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
5294 /* Sort in a separate table to maintain the order of all_type_units
5295 for .gdb_index: TU indices directly index all_type_units. */
5296 sorted_by_abbrev
= XNEWVEC (struct tu_abbrev_offset
,
5297 dwarf2_per_objfile
->n_type_units
);
5298 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
5300 struct signatured_type
*sig_type
= dwarf2_per_objfile
->all_type_units
[i
];
5302 sorted_by_abbrev
[i
].sig_type
= sig_type
;
5303 sorted_by_abbrev
[i
].abbrev_offset
=
5304 read_abbrev_offset (sig_type
->per_cu
.info_or_types_section
,
5305 sig_type
->per_cu
.offset
);
5307 cleanups
= make_cleanup (xfree
, sorted_by_abbrev
);
5308 qsort (sorted_by_abbrev
, dwarf2_per_objfile
->n_type_units
,
5309 sizeof (struct tu_abbrev_offset
), sort_tu_by_abbrev_offset
);
5311 /* Note: In the .gdb_index case, get_type_unit_group may have already been
5312 called any number of times, so we don't reset tu_stats here. */
5314 abbrev_offset
.sect_off
= ~(unsigned) 0;
5315 abbrev_table
= NULL
;
5316 make_cleanup (abbrev_table_free_cleanup
, &abbrev_table
);
5318 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
5320 const struct tu_abbrev_offset
*tu
= &sorted_by_abbrev
[i
];
5322 /* Switch to the next abbrev table if necessary. */
5323 if (abbrev_table
== NULL
5324 || tu
->abbrev_offset
.sect_off
!= abbrev_offset
.sect_off
)
5326 if (abbrev_table
!= NULL
)
5328 abbrev_table_free (abbrev_table
);
5329 /* Reset to NULL in case abbrev_table_read_table throws
5330 an error: abbrev_table_free_cleanup will get called. */
5331 abbrev_table
= NULL
;
5333 abbrev_offset
= tu
->abbrev_offset
;
5335 abbrev_table_read_table (&dwarf2_per_objfile
->abbrev
,
5337 ++tu_stats
->nr_uniq_abbrev_tables
;
5340 init_cutu_and_read_dies (&tu
->sig_type
->per_cu
, abbrev_table
, 0, 0,
5344 /* Create a vector of pointers to primary type units to make it easy to
5345 iterate over them and CUs. See dw2_get_primary_cu. */
5346 dwarf2_per_objfile
->n_type_unit_groups
=
5347 htab_elements (dwarf2_per_objfile
->type_unit_groups
);
5348 dwarf2_per_objfile
->all_type_unit_groups
=
5349 obstack_alloc (&objfile
->objfile_obstack
,
5350 dwarf2_per_objfile
->n_type_unit_groups
5351 * sizeof (struct type_unit_group
*));
5352 iter
= &dwarf2_per_objfile
->all_type_unit_groups
[0];
5353 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
5354 add_type_unit_group_to_table
, &iter
);
5355 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_unit_groups
[0]
5356 == dwarf2_per_objfile
->n_type_unit_groups
);
5358 do_cleanups (cleanups
);
5360 if (dwarf2_read_debug
)
5362 fprintf_unfiltered (gdb_stdlog
, "Done building type unit groups:\n");
5363 fprintf_unfiltered (gdb_stdlog
, " %d TUs\n",
5364 dwarf2_per_objfile
->n_type_units
);
5365 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
5366 tu_stats
->nr_uniq_abbrev_tables
);
5367 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
5368 tu_stats
->nr_symtabs
);
5369 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
5370 tu_stats
->nr_symtab_sharers
);
5371 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
5372 tu_stats
->nr_stmt_less_type_units
);
5376 /* Reader function for build_type_psymtabs. */
5379 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
5381 struct die_info
*type_unit_die
,
5385 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5386 struct dwarf2_cu
*cu
= reader
->cu
;
5387 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
5388 struct type_unit_group
*tu_group
;
5389 struct attribute
*attr
;
5390 struct partial_die_info
*first_die
;
5391 CORE_ADDR lowpc
, highpc
;
5392 struct partial_symtab
*pst
;
5394 gdb_assert (data
== NULL
);
5399 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
5400 tu_group
= get_type_unit_group (cu
, attr
);
5402 VEC_safe_push (dwarf2_per_cu_ptr
, tu_group
->t
.tus
, per_cu
);
5404 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
5405 cu
->list_in_scope
= &file_symbols
;
5406 pst
= create_partial_symtab (per_cu
, "");
5409 first_die
= load_partial_dies (reader
, info_ptr
, 1);
5411 lowpc
= (CORE_ADDR
) -1;
5412 highpc
= (CORE_ADDR
) 0;
5413 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
5415 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
5416 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
5417 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
5418 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
5419 sort_pst_symbols (objfile
, pst
);
5422 /* Traversal function for build_type_psymtabs. */
5425 build_type_psymtab_dependencies (void **slot
, void *info
)
5427 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5428 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
5429 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
5430 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
5431 int len
= VEC_length (dwarf2_per_cu_ptr
, tu_group
->t
.tus
);
5432 struct dwarf2_per_cu_data
*iter
;
5435 gdb_assert (len
> 0);
5437 pst
->number_of_dependencies
= len
;
5438 pst
->dependencies
= obstack_alloc (&objfile
->objfile_obstack
,
5439 len
* sizeof (struct psymtab
*));
5441 VEC_iterate (dwarf2_per_cu_ptr
, tu_group
->t
.tus
, i
, iter
);
5444 pst
->dependencies
[i
] = iter
->v
.psymtab
;
5445 iter
->type_unit_group
= tu_group
;
5448 VEC_free (dwarf2_per_cu_ptr
, tu_group
->t
.tus
);
5453 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
5454 Build partial symbol tables for the .debug_types comp-units. */
5457 build_type_psymtabs (struct objfile
*objfile
)
5459 if (! create_all_type_units (objfile
))
5462 build_type_unit_groups (build_type_psymtabs_reader
, NULL
);
5464 /* Now that all TUs have been processed we can fill in the dependencies. */
5465 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
5466 build_type_psymtab_dependencies
, NULL
);
5469 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
5472 psymtabs_addrmap_cleanup (void *o
)
5474 struct objfile
*objfile
= o
;
5476 objfile
->psymtabs_addrmap
= NULL
;
5479 /* Compute the 'user' field for each psymtab in OBJFILE. */
5482 set_partial_user (struct objfile
*objfile
)
5486 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
5488 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
5489 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
5495 for (j
= 0; j
< pst
->number_of_dependencies
; ++j
)
5497 /* Set the 'user' field only if it is not already set. */
5498 if (pst
->dependencies
[j
]->user
== NULL
)
5499 pst
->dependencies
[j
]->user
= pst
;
5504 /* Build the partial symbol table by doing a quick pass through the
5505 .debug_info and .debug_abbrev sections. */
5508 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
5510 struct cleanup
*back_to
, *addrmap_cleanup
;
5511 struct obstack temp_obstack
;
5514 if (dwarf2_read_debug
)
5516 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
5520 dwarf2_per_objfile
->reading_partial_symbols
= 1;
5522 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
5524 /* Any cached compilation units will be linked by the per-objfile
5525 read_in_chain. Make sure to free them when we're done. */
5526 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
5528 build_type_psymtabs (objfile
);
5530 create_all_comp_units (objfile
);
5532 /* Create a temporary address map on a temporary obstack. We later
5533 copy this to the final obstack. */
5534 obstack_init (&temp_obstack
);
5535 make_cleanup_obstack_free (&temp_obstack
);
5536 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
5537 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
5539 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
5541 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
5543 process_psymtab_comp_unit (per_cu
, 0);
5546 set_partial_user (objfile
);
5548 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
5549 &objfile
->objfile_obstack
);
5550 discard_cleanups (addrmap_cleanup
);
5552 do_cleanups (back_to
);
5554 if (dwarf2_read_debug
)
5555 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
5559 /* die_reader_func for load_partial_comp_unit. */
5562 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
5564 struct die_info
*comp_unit_die
,
5568 struct dwarf2_cu
*cu
= reader
->cu
;
5570 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
5572 /* Check if comp unit has_children.
5573 If so, read the rest of the partial symbols from this comp unit.
5574 If not, there's no more debug_info for this comp unit. */
5576 load_partial_dies (reader
, info_ptr
, 0);
5579 /* Load the partial DIEs for a secondary CU into memory.
5580 This is also used when rereading a primary CU with load_all_dies. */
5583 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
5585 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
5586 load_partial_comp_unit_reader
, NULL
);
5590 read_comp_units_from_section (struct objfile
*objfile
,
5591 struct dwarf2_section_info
*section
,
5592 unsigned int is_dwz
,
5595 struct dwarf2_per_cu_data
***all_comp_units
)
5598 bfd
*abfd
= section
->asection
->owner
;
5600 dwarf2_read_section (objfile
, section
);
5602 info_ptr
= section
->buffer
;
5604 while (info_ptr
< section
->buffer
+ section
->size
)
5606 unsigned int length
, initial_length_size
;
5607 struct dwarf2_per_cu_data
*this_cu
;
5610 offset
.sect_off
= info_ptr
- section
->buffer
;
5612 /* Read just enough information to find out where the next
5613 compilation unit is. */
5614 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
5616 /* Save the compilation unit for later lookup. */
5617 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
5618 sizeof (struct dwarf2_per_cu_data
));
5619 memset (this_cu
, 0, sizeof (*this_cu
));
5620 this_cu
->offset
= offset
;
5621 this_cu
->length
= length
+ initial_length_size
;
5622 this_cu
->is_dwz
= is_dwz
;
5623 this_cu
->objfile
= objfile
;
5624 this_cu
->info_or_types_section
= section
;
5626 if (*n_comp_units
== *n_allocated
)
5629 *all_comp_units
= xrealloc (*all_comp_units
,
5631 * sizeof (struct dwarf2_per_cu_data
*));
5633 (*all_comp_units
)[*n_comp_units
] = this_cu
;
5636 info_ptr
= info_ptr
+ this_cu
->length
;
5640 /* Create a list of all compilation units in OBJFILE.
5641 This is only done for -readnow and building partial symtabs. */
5644 create_all_comp_units (struct objfile
*objfile
)
5648 struct dwarf2_per_cu_data
**all_comp_units
;
5652 all_comp_units
= xmalloc (n_allocated
5653 * sizeof (struct dwarf2_per_cu_data
*));
5655 read_comp_units_from_section (objfile
, &dwarf2_per_objfile
->info
, 0,
5656 &n_allocated
, &n_comp_units
, &all_comp_units
);
5658 if (bfd_get_section_by_name (objfile
->obfd
, ".gnu_debugaltlink") != NULL
)
5660 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
5662 read_comp_units_from_section (objfile
, &dwz
->info
, 1,
5663 &n_allocated
, &n_comp_units
,
5667 dwarf2_per_objfile
->all_comp_units
5668 = obstack_alloc (&objfile
->objfile_obstack
,
5669 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
5670 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
5671 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
5672 xfree (all_comp_units
);
5673 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
5676 /* Process all loaded DIEs for compilation unit CU, starting at
5677 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
5678 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
5679 DW_AT_ranges). If NEED_PC is set, then this function will set
5680 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
5681 and record the covered ranges in the addrmap. */
5684 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
5685 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
5687 struct partial_die_info
*pdi
;
5689 /* Now, march along the PDI's, descending into ones which have
5690 interesting children but skipping the children of the other ones,
5691 until we reach the end of the compilation unit. */
5697 fixup_partial_die (pdi
, cu
);
5699 /* Anonymous namespaces or modules have no name but have interesting
5700 children, so we need to look at them. Ditto for anonymous
5703 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
5704 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
5705 || pdi
->tag
== DW_TAG_imported_unit
)
5709 case DW_TAG_subprogram
:
5710 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
5712 case DW_TAG_constant
:
5713 case DW_TAG_variable
:
5714 case DW_TAG_typedef
:
5715 case DW_TAG_union_type
:
5716 if (!pdi
->is_declaration
)
5718 add_partial_symbol (pdi
, cu
);
5721 case DW_TAG_class_type
:
5722 case DW_TAG_interface_type
:
5723 case DW_TAG_structure_type
:
5724 if (!pdi
->is_declaration
)
5726 add_partial_symbol (pdi
, cu
);
5729 case DW_TAG_enumeration_type
:
5730 if (!pdi
->is_declaration
)
5731 add_partial_enumeration (pdi
, cu
);
5733 case DW_TAG_base_type
:
5734 case DW_TAG_subrange_type
:
5735 /* File scope base type definitions are added to the partial
5737 add_partial_symbol (pdi
, cu
);
5739 case DW_TAG_namespace
:
5740 add_partial_namespace (pdi
, lowpc
, highpc
, need_pc
, cu
);
5743 add_partial_module (pdi
, lowpc
, highpc
, need_pc
, cu
);
5745 case DW_TAG_imported_unit
:
5747 struct dwarf2_per_cu_data
*per_cu
;
5749 /* For now we don't handle imported units in type units. */
5750 if (cu
->per_cu
->is_debug_types
)
5752 error (_("Dwarf Error: DW_TAG_imported_unit is not"
5753 " supported in type units [in module %s]"),
5757 per_cu
= dwarf2_find_containing_comp_unit (pdi
->d
.offset
,
5761 /* Go read the partial unit, if needed. */
5762 if (per_cu
->v
.psymtab
== NULL
)
5763 process_psymtab_comp_unit (per_cu
, 1);
5765 VEC_safe_push (dwarf2_per_cu_ptr
,
5766 cu
->per_cu
->imported_symtabs
, per_cu
);
5774 /* If the die has a sibling, skip to the sibling. */
5776 pdi
= pdi
->die_sibling
;
5780 /* Functions used to compute the fully scoped name of a partial DIE.
5782 Normally, this is simple. For C++, the parent DIE's fully scoped
5783 name is concatenated with "::" and the partial DIE's name. For
5784 Java, the same thing occurs except that "." is used instead of "::".
5785 Enumerators are an exception; they use the scope of their parent
5786 enumeration type, i.e. the name of the enumeration type is not
5787 prepended to the enumerator.
5789 There are two complexities. One is DW_AT_specification; in this
5790 case "parent" means the parent of the target of the specification,
5791 instead of the direct parent of the DIE. The other is compilers
5792 which do not emit DW_TAG_namespace; in this case we try to guess
5793 the fully qualified name of structure types from their members'
5794 linkage names. This must be done using the DIE's children rather
5795 than the children of any DW_AT_specification target. We only need
5796 to do this for structures at the top level, i.e. if the target of
5797 any DW_AT_specification (if any; otherwise the DIE itself) does not
5800 /* Compute the scope prefix associated with PDI's parent, in
5801 compilation unit CU. The result will be allocated on CU's
5802 comp_unit_obstack, or a copy of the already allocated PDI->NAME
5803 field. NULL is returned if no prefix is necessary. */
5805 partial_die_parent_scope (struct partial_die_info
*pdi
,
5806 struct dwarf2_cu
*cu
)
5808 const char *grandparent_scope
;
5809 struct partial_die_info
*parent
, *real_pdi
;
5811 /* We need to look at our parent DIE; if we have a DW_AT_specification,
5812 then this means the parent of the specification DIE. */
5815 while (real_pdi
->has_specification
)
5816 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
5817 real_pdi
->spec_is_dwz
, cu
);
5819 parent
= real_pdi
->die_parent
;
5823 if (parent
->scope_set
)
5824 return parent
->scope
;
5826 fixup_partial_die (parent
, cu
);
5828 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
5830 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
5831 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
5832 Work around this problem here. */
5833 if (cu
->language
== language_cplus
5834 && parent
->tag
== DW_TAG_namespace
5835 && strcmp (parent
->name
, "::") == 0
5836 && grandparent_scope
== NULL
)
5838 parent
->scope
= NULL
;
5839 parent
->scope_set
= 1;
5843 if (pdi
->tag
== DW_TAG_enumerator
)
5844 /* Enumerators should not get the name of the enumeration as a prefix. */
5845 parent
->scope
= grandparent_scope
;
5846 else if (parent
->tag
== DW_TAG_namespace
5847 || parent
->tag
== DW_TAG_module
5848 || parent
->tag
== DW_TAG_structure_type
5849 || parent
->tag
== DW_TAG_class_type
5850 || parent
->tag
== DW_TAG_interface_type
5851 || parent
->tag
== DW_TAG_union_type
5852 || parent
->tag
== DW_TAG_enumeration_type
)
5854 if (grandparent_scope
== NULL
)
5855 parent
->scope
= parent
->name
;
5857 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
5859 parent
->name
, 0, cu
);
5863 /* FIXME drow/2004-04-01: What should we be doing with
5864 function-local names? For partial symbols, we should probably be
5866 complaint (&symfile_complaints
,
5867 _("unhandled containing DIE tag %d for DIE at %d"),
5868 parent
->tag
, pdi
->offset
.sect_off
);
5869 parent
->scope
= grandparent_scope
;
5872 parent
->scope_set
= 1;
5873 return parent
->scope
;
5876 /* Return the fully scoped name associated with PDI, from compilation unit
5877 CU. The result will be allocated with malloc. */
5880 partial_die_full_name (struct partial_die_info
*pdi
,
5881 struct dwarf2_cu
*cu
)
5883 const char *parent_scope
;
5885 /* If this is a template instantiation, we can not work out the
5886 template arguments from partial DIEs. So, unfortunately, we have
5887 to go through the full DIEs. At least any work we do building
5888 types here will be reused if full symbols are loaded later. */
5889 if (pdi
->has_template_arguments
)
5891 fixup_partial_die (pdi
, cu
);
5893 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
5895 struct die_info
*die
;
5896 struct attribute attr
;
5897 struct dwarf2_cu
*ref_cu
= cu
;
5899 /* DW_FORM_ref_addr is using section offset. */
5901 attr
.form
= DW_FORM_ref_addr
;
5902 attr
.u
.unsnd
= pdi
->offset
.sect_off
;
5903 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
5905 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
5909 parent_scope
= partial_die_parent_scope (pdi
, cu
);
5910 if (parent_scope
== NULL
)
5913 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
5917 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
5919 struct objfile
*objfile
= cu
->objfile
;
5921 const char *actual_name
= NULL
;
5923 char *built_actual_name
;
5925 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5927 built_actual_name
= partial_die_full_name (pdi
, cu
);
5928 if (built_actual_name
!= NULL
)
5929 actual_name
= built_actual_name
;
5931 if (actual_name
== NULL
)
5932 actual_name
= pdi
->name
;
5936 case DW_TAG_subprogram
:
5937 if (pdi
->is_external
|| cu
->language
== language_ada
)
5939 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
5940 of the global scope. But in Ada, we want to be able to access
5941 nested procedures globally. So all Ada subprograms are stored
5942 in the global scope. */
5943 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
5944 mst_text, objfile); */
5945 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5946 built_actual_name
!= NULL
,
5947 VAR_DOMAIN
, LOC_BLOCK
,
5948 &objfile
->global_psymbols
,
5949 0, pdi
->lowpc
+ baseaddr
,
5950 cu
->language
, objfile
);
5954 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
5955 mst_file_text, objfile); */
5956 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5957 built_actual_name
!= NULL
,
5958 VAR_DOMAIN
, LOC_BLOCK
,
5959 &objfile
->static_psymbols
,
5960 0, pdi
->lowpc
+ baseaddr
,
5961 cu
->language
, objfile
);
5964 case DW_TAG_constant
:
5966 struct psymbol_allocation_list
*list
;
5968 if (pdi
->is_external
)
5969 list
= &objfile
->global_psymbols
;
5971 list
= &objfile
->static_psymbols
;
5972 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5973 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
5974 list
, 0, 0, cu
->language
, objfile
);
5977 case DW_TAG_variable
:
5979 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
5983 && !dwarf2_per_objfile
->has_section_at_zero
)
5985 /* A global or static variable may also have been stripped
5986 out by the linker if unused, in which case its address
5987 will be nullified; do not add such variables into partial
5988 symbol table then. */
5990 else if (pdi
->is_external
)
5993 Don't enter into the minimal symbol tables as there is
5994 a minimal symbol table entry from the ELF symbols already.
5995 Enter into partial symbol table if it has a location
5996 descriptor or a type.
5997 If the location descriptor is missing, new_symbol will create
5998 a LOC_UNRESOLVED symbol, the address of the variable will then
5999 be determined from the minimal symbol table whenever the variable
6001 The address for the partial symbol table entry is not
6002 used by GDB, but it comes in handy for debugging partial symbol
6005 if (pdi
->d
.locdesc
|| pdi
->has_type
)
6006 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6007 built_actual_name
!= NULL
,
6008 VAR_DOMAIN
, LOC_STATIC
,
6009 &objfile
->global_psymbols
,
6011 cu
->language
, objfile
);
6015 /* Static Variable. Skip symbols without location descriptors. */
6016 if (pdi
->d
.locdesc
== NULL
)
6018 xfree (built_actual_name
);
6021 /* prim_record_minimal_symbol (actual_name, addr + baseaddr,
6022 mst_file_data, objfile); */
6023 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6024 built_actual_name
!= NULL
,
6025 VAR_DOMAIN
, LOC_STATIC
,
6026 &objfile
->static_psymbols
,
6028 cu
->language
, objfile
);
6031 case DW_TAG_typedef
:
6032 case DW_TAG_base_type
:
6033 case DW_TAG_subrange_type
:
6034 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6035 built_actual_name
!= NULL
,
6036 VAR_DOMAIN
, LOC_TYPEDEF
,
6037 &objfile
->static_psymbols
,
6038 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6040 case DW_TAG_namespace
:
6041 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6042 built_actual_name
!= NULL
,
6043 VAR_DOMAIN
, LOC_TYPEDEF
,
6044 &objfile
->global_psymbols
,
6045 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6047 case DW_TAG_class_type
:
6048 case DW_TAG_interface_type
:
6049 case DW_TAG_structure_type
:
6050 case DW_TAG_union_type
:
6051 case DW_TAG_enumeration_type
:
6052 /* Skip external references. The DWARF standard says in the section
6053 about "Structure, Union, and Class Type Entries": "An incomplete
6054 structure, union or class type is represented by a structure,
6055 union or class entry that does not have a byte size attribute
6056 and that has a DW_AT_declaration attribute." */
6057 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
6059 xfree (built_actual_name
);
6063 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
6064 static vs. global. */
6065 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6066 built_actual_name
!= NULL
,
6067 STRUCT_DOMAIN
, LOC_TYPEDEF
,
6068 (cu
->language
== language_cplus
6069 || cu
->language
== language_java
)
6070 ? &objfile
->global_psymbols
6071 : &objfile
->static_psymbols
,
6072 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6075 case DW_TAG_enumerator
:
6076 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6077 built_actual_name
!= NULL
,
6078 VAR_DOMAIN
, LOC_CONST
,
6079 (cu
->language
== language_cplus
6080 || cu
->language
== language_java
)
6081 ? &objfile
->global_psymbols
6082 : &objfile
->static_psymbols
,
6083 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6089 xfree (built_actual_name
);
6092 /* Read a partial die corresponding to a namespace; also, add a symbol
6093 corresponding to that namespace to the symbol table. NAMESPACE is
6094 the name of the enclosing namespace. */
6097 add_partial_namespace (struct partial_die_info
*pdi
,
6098 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
6099 int need_pc
, struct dwarf2_cu
*cu
)
6101 /* Add a symbol for the namespace. */
6103 add_partial_symbol (pdi
, cu
);
6105 /* Now scan partial symbols in that namespace. */
6107 if (pdi
->has_children
)
6108 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
6111 /* Read a partial die corresponding to a Fortran module. */
6114 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
6115 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
6117 /* Now scan partial symbols in that module. */
6119 if (pdi
->has_children
)
6120 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
6123 /* Read a partial die corresponding to a subprogram and create a partial
6124 symbol for that subprogram. When the CU language allows it, this
6125 routine also defines a partial symbol for each nested subprogram
6126 that this subprogram contains.
6128 DIE my also be a lexical block, in which case we simply search
6129 recursively for suprograms defined inside that lexical block.
6130 Again, this is only performed when the CU language allows this
6131 type of definitions. */
6134 add_partial_subprogram (struct partial_die_info
*pdi
,
6135 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
6136 int need_pc
, struct dwarf2_cu
*cu
)
6138 if (pdi
->tag
== DW_TAG_subprogram
)
6140 if (pdi
->has_pc_info
)
6142 if (pdi
->lowpc
< *lowpc
)
6143 *lowpc
= pdi
->lowpc
;
6144 if (pdi
->highpc
> *highpc
)
6145 *highpc
= pdi
->highpc
;
6149 struct objfile
*objfile
= cu
->objfile
;
6151 baseaddr
= ANOFFSET (objfile
->section_offsets
,
6152 SECT_OFF_TEXT (objfile
));
6153 addrmap_set_empty (objfile
->psymtabs_addrmap
,
6154 pdi
->lowpc
+ baseaddr
,
6155 pdi
->highpc
- 1 + baseaddr
,
6156 cu
->per_cu
->v
.psymtab
);
6160 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
6162 if (!pdi
->is_declaration
)
6163 /* Ignore subprogram DIEs that do not have a name, they are
6164 illegal. Do not emit a complaint at this point, we will
6165 do so when we convert this psymtab into a symtab. */
6167 add_partial_symbol (pdi
, cu
);
6171 if (! pdi
->has_children
)
6174 if (cu
->language
== language_ada
)
6176 pdi
= pdi
->die_child
;
6179 fixup_partial_die (pdi
, cu
);
6180 if (pdi
->tag
== DW_TAG_subprogram
6181 || pdi
->tag
== DW_TAG_lexical_block
)
6182 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
6183 pdi
= pdi
->die_sibling
;
6188 /* Read a partial die corresponding to an enumeration type. */
6191 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
6192 struct dwarf2_cu
*cu
)
6194 struct partial_die_info
*pdi
;
6196 if (enum_pdi
->name
!= NULL
)
6197 add_partial_symbol (enum_pdi
, cu
);
6199 pdi
= enum_pdi
->die_child
;
6202 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
6203 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
6205 add_partial_symbol (pdi
, cu
);
6206 pdi
= pdi
->die_sibling
;
6210 /* Return the initial uleb128 in the die at INFO_PTR. */
6213 peek_abbrev_code (bfd
*abfd
, gdb_byte
*info_ptr
)
6215 unsigned int bytes_read
;
6217 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6220 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
6221 Return the corresponding abbrev, or NULL if the number is zero (indicating
6222 an empty DIE). In either case *BYTES_READ will be set to the length of
6223 the initial number. */
6225 static struct abbrev_info
*
6226 peek_die_abbrev (gdb_byte
*info_ptr
, unsigned int *bytes_read
,
6227 struct dwarf2_cu
*cu
)
6229 bfd
*abfd
= cu
->objfile
->obfd
;
6230 unsigned int abbrev_number
;
6231 struct abbrev_info
*abbrev
;
6233 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
6235 if (abbrev_number
== 0)
6238 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
6241 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"),
6242 abbrev_number
, bfd_get_filename (abfd
));
6248 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
6249 Returns a pointer to the end of a series of DIEs, terminated by an empty
6250 DIE. Any children of the skipped DIEs will also be skipped. */
6253 skip_children (const struct die_reader_specs
*reader
, gdb_byte
*info_ptr
)
6255 struct dwarf2_cu
*cu
= reader
->cu
;
6256 struct abbrev_info
*abbrev
;
6257 unsigned int bytes_read
;
6261 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
6263 return info_ptr
+ bytes_read
;
6265 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
6269 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
6270 INFO_PTR should point just after the initial uleb128 of a DIE, and the
6271 abbrev corresponding to that skipped uleb128 should be passed in
6272 ABBREV. Returns a pointer to this DIE's sibling, skipping any
6276 skip_one_die (const struct die_reader_specs
*reader
, gdb_byte
*info_ptr
,
6277 struct abbrev_info
*abbrev
)
6279 unsigned int bytes_read
;
6280 struct attribute attr
;
6281 bfd
*abfd
= reader
->abfd
;
6282 struct dwarf2_cu
*cu
= reader
->cu
;
6283 gdb_byte
*buffer
= reader
->buffer
;
6284 const gdb_byte
*buffer_end
= reader
->buffer_end
;
6285 gdb_byte
*start_info_ptr
= info_ptr
;
6286 unsigned int form
, i
;
6288 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
6290 /* The only abbrev we care about is DW_AT_sibling. */
6291 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
6293 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
6294 if (attr
.form
== DW_FORM_ref_addr
)
6295 complaint (&symfile_complaints
,
6296 _("ignoring absolute DW_AT_sibling"));
6298 return buffer
+ dwarf2_get_ref_die_offset (&attr
).sect_off
;
6301 /* If it isn't DW_AT_sibling, skip this attribute. */
6302 form
= abbrev
->attrs
[i
].form
;
6306 case DW_FORM_ref_addr
:
6307 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
6308 and later it is offset sized. */
6309 if (cu
->header
.version
== 2)
6310 info_ptr
+= cu
->header
.addr_size
;
6312 info_ptr
+= cu
->header
.offset_size
;
6314 case DW_FORM_GNU_ref_alt
:
6315 info_ptr
+= cu
->header
.offset_size
;
6318 info_ptr
+= cu
->header
.addr_size
;
6325 case DW_FORM_flag_present
:
6337 case DW_FORM_ref_sig8
:
6340 case DW_FORM_string
:
6341 read_direct_string (abfd
, info_ptr
, &bytes_read
);
6342 info_ptr
+= bytes_read
;
6344 case DW_FORM_sec_offset
:
6346 case DW_FORM_GNU_strp_alt
:
6347 info_ptr
+= cu
->header
.offset_size
;
6349 case DW_FORM_exprloc
:
6351 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6352 info_ptr
+= bytes_read
;
6354 case DW_FORM_block1
:
6355 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
6357 case DW_FORM_block2
:
6358 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
6360 case DW_FORM_block4
:
6361 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
6365 case DW_FORM_ref_udata
:
6366 case DW_FORM_GNU_addr_index
:
6367 case DW_FORM_GNU_str_index
:
6368 info_ptr
= (gdb_byte
*) safe_skip_leb128 (info_ptr
, buffer_end
);
6370 case DW_FORM_indirect
:
6371 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6372 info_ptr
+= bytes_read
;
6373 /* We need to continue parsing from here, so just go back to
6375 goto skip_attribute
;
6378 error (_("Dwarf Error: Cannot handle %s "
6379 "in DWARF reader [in module %s]"),
6380 dwarf_form_name (form
),
6381 bfd_get_filename (abfd
));
6385 if (abbrev
->has_children
)
6386 return skip_children (reader
, info_ptr
);
6391 /* Locate ORIG_PDI's sibling.
6392 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
6395 locate_pdi_sibling (const struct die_reader_specs
*reader
,
6396 struct partial_die_info
*orig_pdi
,
6399 /* Do we know the sibling already? */
6401 if (orig_pdi
->sibling
)
6402 return orig_pdi
->sibling
;
6404 /* Are there any children to deal with? */
6406 if (!orig_pdi
->has_children
)
6409 /* Skip the children the long way. */
6411 return skip_children (reader
, info_ptr
);
6414 /* Expand this partial symbol table into a full symbol table. SELF is
6418 dwarf2_read_symtab (struct partial_symtab
*self
,
6419 struct objfile
*objfile
)
6423 warning (_("bug: psymtab for %s is already read in."),
6430 printf_filtered (_("Reading in symbols for %s..."),
6432 gdb_flush (gdb_stdout
);
6435 /* Restore our global data. */
6436 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
6438 /* If this psymtab is constructed from a debug-only objfile, the
6439 has_section_at_zero flag will not necessarily be correct. We
6440 can get the correct value for this flag by looking at the data
6441 associated with the (presumably stripped) associated objfile. */
6442 if (objfile
->separate_debug_objfile_backlink
)
6444 struct dwarf2_per_objfile
*dpo_backlink
6445 = objfile_data (objfile
->separate_debug_objfile_backlink
,
6446 dwarf2_objfile_data_key
);
6448 dwarf2_per_objfile
->has_section_at_zero
6449 = dpo_backlink
->has_section_at_zero
;
6452 dwarf2_per_objfile
->reading_partial_symbols
= 0;
6454 psymtab_to_symtab_1 (self
);
6456 /* Finish up the debug error message. */
6458 printf_filtered (_("done.\n"));
6461 process_cu_includes ();
6464 /* Reading in full CUs. */
6466 /* Add PER_CU to the queue. */
6469 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
6470 enum language pretend_language
)
6472 struct dwarf2_queue_item
*item
;
6475 item
= xmalloc (sizeof (*item
));
6476 item
->per_cu
= per_cu
;
6477 item
->pretend_language
= pretend_language
;
6480 if (dwarf2_queue
== NULL
)
6481 dwarf2_queue
= item
;
6483 dwarf2_queue_tail
->next
= item
;
6485 dwarf2_queue_tail
= item
;
6488 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
6489 unit and add it to our queue.
6490 The result is non-zero if PER_CU was queued, otherwise the result is zero
6491 meaning either PER_CU is already queued or it is already loaded. */
6494 maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
6495 struct dwarf2_per_cu_data
*per_cu
,
6496 enum language pretend_language
)
6498 /* We may arrive here during partial symbol reading, if we need full
6499 DIEs to process an unusual case (e.g. template arguments). Do
6500 not queue PER_CU, just tell our caller to load its DIEs. */
6501 if (dwarf2_per_objfile
->reading_partial_symbols
)
6503 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
6508 /* Mark the dependence relation so that we don't flush PER_CU
6510 dwarf2_add_dependence (this_cu
, per_cu
);
6512 /* If it's already on the queue, we have nothing to do. */
6516 /* If the compilation unit is already loaded, just mark it as
6518 if (per_cu
->cu
!= NULL
)
6520 per_cu
->cu
->last_used
= 0;
6524 /* Add it to the queue. */
6525 queue_comp_unit (per_cu
, pretend_language
);
6530 /* Process the queue. */
6533 process_queue (void)
6535 struct dwarf2_queue_item
*item
, *next_item
;
6537 if (dwarf2_read_debug
)
6539 fprintf_unfiltered (gdb_stdlog
,
6540 "Expanding one or more symtabs of objfile %s ...\n",
6541 dwarf2_per_objfile
->objfile
->name
);
6544 /* The queue starts out with one item, but following a DIE reference
6545 may load a new CU, adding it to the end of the queue. */
6546 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
6548 if (dwarf2_per_objfile
->using_index
6549 ? !item
->per_cu
->v
.quick
->symtab
6550 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
6552 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
6554 if (dwarf2_read_debug
)
6556 fprintf_unfiltered (gdb_stdlog
,
6557 "Expanding symtab of %s at offset 0x%x\n",
6558 per_cu
->is_debug_types
? "TU" : "CU",
6559 per_cu
->offset
.sect_off
);
6562 if (per_cu
->is_debug_types
)
6563 process_full_type_unit (per_cu
, item
->pretend_language
);
6565 process_full_comp_unit (per_cu
, item
->pretend_language
);
6567 if (dwarf2_read_debug
)
6569 fprintf_unfiltered (gdb_stdlog
,
6570 "Done expanding %s at offset 0x%x\n",
6571 per_cu
->is_debug_types
? "TU" : "CU",
6572 per_cu
->offset
.sect_off
);
6576 item
->per_cu
->queued
= 0;
6577 next_item
= item
->next
;
6581 dwarf2_queue_tail
= NULL
;
6583 if (dwarf2_read_debug
)
6585 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
6586 dwarf2_per_objfile
->objfile
->name
);
6590 /* Free all allocated queue entries. This function only releases anything if
6591 an error was thrown; if the queue was processed then it would have been
6592 freed as we went along. */
6595 dwarf2_release_queue (void *dummy
)
6597 struct dwarf2_queue_item
*item
, *last
;
6599 item
= dwarf2_queue
;
6602 /* Anything still marked queued is likely to be in an
6603 inconsistent state, so discard it. */
6604 if (item
->per_cu
->queued
)
6606 if (item
->per_cu
->cu
!= NULL
)
6607 free_one_cached_comp_unit (item
->per_cu
);
6608 item
->per_cu
->queued
= 0;
6616 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
6619 /* Read in full symbols for PST, and anything it depends on. */
6622 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
6624 struct dwarf2_per_cu_data
*per_cu
;
6630 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
6631 if (!pst
->dependencies
[i
]->readin
6632 && pst
->dependencies
[i
]->user
== NULL
)
6634 /* Inform about additional files that need to be read in. */
6637 /* FIXME: i18n: Need to make this a single string. */
6638 fputs_filtered (" ", gdb_stdout
);
6640 fputs_filtered ("and ", gdb_stdout
);
6642 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
6643 wrap_here (""); /* Flush output. */
6644 gdb_flush (gdb_stdout
);
6646 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
6649 per_cu
= pst
->read_symtab_private
;
6653 /* It's an include file, no symbols to read for it.
6654 Everything is in the parent symtab. */
6659 dw2_do_instantiate_symtab (per_cu
);
6662 /* Trivial hash function for die_info: the hash value of a DIE
6663 is its offset in .debug_info for this objfile. */
6666 die_hash (const void *item
)
6668 const struct die_info
*die
= item
;
6670 return die
->offset
.sect_off
;
6673 /* Trivial comparison function for die_info structures: two DIEs
6674 are equal if they have the same offset. */
6677 die_eq (const void *item_lhs
, const void *item_rhs
)
6679 const struct die_info
*die_lhs
= item_lhs
;
6680 const struct die_info
*die_rhs
= item_rhs
;
6682 return die_lhs
->offset
.sect_off
== die_rhs
->offset
.sect_off
;
6685 /* die_reader_func for load_full_comp_unit.
6686 This is identical to read_signatured_type_reader,
6687 but is kept separate for now. */
6690 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
6692 struct die_info
*comp_unit_die
,
6696 struct dwarf2_cu
*cu
= reader
->cu
;
6697 enum language
*language_ptr
= data
;
6699 gdb_assert (cu
->die_hash
== NULL
);
6701 htab_create_alloc_ex (cu
->header
.length
/ 12,
6705 &cu
->comp_unit_obstack
,
6706 hashtab_obstack_allocate
,
6707 dummy_obstack_deallocate
);
6710 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
6711 &info_ptr
, comp_unit_die
);
6712 cu
->dies
= comp_unit_die
;
6713 /* comp_unit_die is not stored in die_hash, no need. */
6715 /* We try not to read any attributes in this function, because not
6716 all CUs needed for references have been loaded yet, and symbol
6717 table processing isn't initialized. But we have to set the CU language,
6718 or we won't be able to build types correctly.
6719 Similarly, if we do not read the producer, we can not apply
6720 producer-specific interpretation. */
6721 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
6724 /* Load the DIEs associated with PER_CU into memory. */
6727 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
6728 enum language pretend_language
)
6730 gdb_assert (! this_cu
->is_debug_types
);
6732 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
6733 load_full_comp_unit_reader
, &pretend_language
);
6736 /* Add a DIE to the delayed physname list. */
6739 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
6740 const char *name
, struct die_info
*die
,
6741 struct dwarf2_cu
*cu
)
6743 struct delayed_method_info mi
;
6745 mi
.fnfield_index
= fnfield_index
;
6749 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
6752 /* A cleanup for freeing the delayed method list. */
6755 free_delayed_list (void *ptr
)
6757 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
6758 if (cu
->method_list
!= NULL
)
6760 VEC_free (delayed_method_info
, cu
->method_list
);
6761 cu
->method_list
= NULL
;
6765 /* Compute the physnames of any methods on the CU's method list.
6767 The computation of method physnames is delayed in order to avoid the
6768 (bad) condition that one of the method's formal parameters is of an as yet
6772 compute_delayed_physnames (struct dwarf2_cu
*cu
)
6775 struct delayed_method_info
*mi
;
6776 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
6778 const char *physname
;
6779 struct fn_fieldlist
*fn_flp
6780 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
6781 physname
= dwarf2_physname (mi
->name
, mi
->die
, cu
);
6782 fn_flp
->fn_fields
[mi
->index
].physname
= physname
? physname
: "";
6786 /* Go objects should be embedded in a DW_TAG_module DIE,
6787 and it's not clear if/how imported objects will appear.
6788 To keep Go support simple until that's worked out,
6789 go back through what we've read and create something usable.
6790 We could do this while processing each DIE, and feels kinda cleaner,
6791 but that way is more invasive.
6792 This is to, for example, allow the user to type "p var" or "b main"
6793 without having to specify the package name, and allow lookups
6794 of module.object to work in contexts that use the expression
6798 fixup_go_packaging (struct dwarf2_cu
*cu
)
6800 char *package_name
= NULL
;
6801 struct pending
*list
;
6804 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
6806 for (i
= 0; i
< list
->nsyms
; ++i
)
6808 struct symbol
*sym
= list
->symbol
[i
];
6810 if (SYMBOL_LANGUAGE (sym
) == language_go
6811 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
6813 char *this_package_name
= go_symbol_package_name (sym
);
6815 if (this_package_name
== NULL
)
6817 if (package_name
== NULL
)
6818 package_name
= this_package_name
;
6821 if (strcmp (package_name
, this_package_name
) != 0)
6822 complaint (&symfile_complaints
,
6823 _("Symtab %s has objects from two different Go packages: %s and %s"),
6824 (SYMBOL_SYMTAB (sym
)
6825 ? symtab_to_filename_for_display (SYMBOL_SYMTAB (sym
))
6826 : cu
->objfile
->name
),
6827 this_package_name
, package_name
);
6828 xfree (this_package_name
);
6834 if (package_name
!= NULL
)
6836 struct objfile
*objfile
= cu
->objfile
;
6837 const char *saved_package_name
= obstack_copy0 (&objfile
->objfile_obstack
,
6839 strlen (package_name
));
6840 struct type
*type
= init_type (TYPE_CODE_MODULE
, 0, 0,
6841 saved_package_name
, objfile
);
6844 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
6846 sym
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
6847 SYMBOL_SET_LANGUAGE (sym
, language_go
);
6848 SYMBOL_SET_NAMES (sym
, saved_package_name
,
6849 strlen (saved_package_name
), 0, objfile
);
6850 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
6851 e.g., "main" finds the "main" module and not C's main(). */
6852 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
6853 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
6854 SYMBOL_TYPE (sym
) = type
;
6856 add_symbol_to_list (sym
, &global_symbols
);
6858 xfree (package_name
);
6862 static void compute_symtab_includes (struct dwarf2_per_cu_data
*per_cu
);
6864 /* Return the symtab for PER_CU. This works properly regardless of
6865 whether we're using the index or psymtabs. */
6867 static struct symtab
*
6868 get_symtab (struct dwarf2_per_cu_data
*per_cu
)
6870 return (dwarf2_per_objfile
->using_index
6871 ? per_cu
->v
.quick
->symtab
6872 : per_cu
->v
.psymtab
->symtab
);
6875 /* A helper function for computing the list of all symbol tables
6876 included by PER_CU. */
6879 recursively_compute_inclusions (VEC (dwarf2_per_cu_ptr
) **result
,
6880 htab_t all_children
,
6881 struct dwarf2_per_cu_data
*per_cu
)
6885 struct dwarf2_per_cu_data
*iter
;
6887 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
6890 /* This inclusion and its children have been processed. */
6895 /* Only add a CU if it has a symbol table. */
6896 if (get_symtab (per_cu
) != NULL
)
6897 VEC_safe_push (dwarf2_per_cu_ptr
, *result
, per_cu
);
6900 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
6902 recursively_compute_inclusions (result
, all_children
, iter
);
6905 /* Compute the symtab 'includes' fields for the symtab related to
6909 compute_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
6911 gdb_assert (! per_cu
->is_debug_types
);
6913 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
6916 struct dwarf2_per_cu_data
*iter
;
6917 VEC (dwarf2_per_cu_ptr
) *result_children
= NULL
;
6918 htab_t all_children
;
6919 struct symtab
*symtab
= get_symtab (per_cu
);
6921 /* If we don't have a symtab, we can just skip this case. */
6925 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
6926 NULL
, xcalloc
, xfree
);
6929 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
6932 recursively_compute_inclusions (&result_children
, all_children
, iter
);
6934 /* Now we have a transitive closure of all the included CUs, and
6935 for .gdb_index version 7 the included TUs, so we can convert it
6936 to a list of symtabs. */
6937 len
= VEC_length (dwarf2_per_cu_ptr
, result_children
);
6939 = obstack_alloc (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
6940 (len
+ 1) * sizeof (struct symtab
*));
6942 VEC_iterate (dwarf2_per_cu_ptr
, result_children
, ix
, iter
);
6944 symtab
->includes
[ix
] = get_symtab (iter
);
6945 symtab
->includes
[len
] = NULL
;
6947 VEC_free (dwarf2_per_cu_ptr
, result_children
);
6948 htab_delete (all_children
);
6952 /* Compute the 'includes' field for the symtabs of all the CUs we just
6956 process_cu_includes (void)
6959 struct dwarf2_per_cu_data
*iter
;
6962 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
6966 if (! iter
->is_debug_types
)
6967 compute_symtab_includes (iter
);
6970 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
6973 /* Generate full symbol information for PER_CU, whose DIEs have
6974 already been loaded into memory. */
6977 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
6978 enum language pretend_language
)
6980 struct dwarf2_cu
*cu
= per_cu
->cu
;
6981 struct objfile
*objfile
= per_cu
->objfile
;
6982 CORE_ADDR lowpc
, highpc
;
6983 struct symtab
*symtab
;
6984 struct cleanup
*back_to
, *delayed_list_cleanup
;
6986 struct block
*static_block
;
6988 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6991 back_to
= make_cleanup (really_free_pendings
, NULL
);
6992 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
6994 cu
->list_in_scope
= &file_symbols
;
6996 cu
->language
= pretend_language
;
6997 cu
->language_defn
= language_def (cu
->language
);
6999 /* Do line number decoding in read_file_scope () */
7000 process_die (cu
->dies
, cu
);
7002 /* For now fudge the Go package. */
7003 if (cu
->language
== language_go
)
7004 fixup_go_packaging (cu
);
7006 /* Now that we have processed all the DIEs in the CU, all the types
7007 should be complete, and it should now be safe to compute all of the
7009 compute_delayed_physnames (cu
);
7010 do_cleanups (delayed_list_cleanup
);
7012 /* Some compilers don't define a DW_AT_high_pc attribute for the
7013 compilation unit. If the DW_AT_high_pc is missing, synthesize
7014 it, by scanning the DIE's below the compilation unit. */
7015 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
7018 = end_symtab_get_static_block (highpc
+ baseaddr
, objfile
, 0,
7019 per_cu
->imported_symtabs
!= NULL
);
7021 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
7022 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
7023 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
7024 addrmap to help ensure it has an accurate map of pc values belonging to
7026 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
7028 symtab
= end_symtab_from_static_block (static_block
, objfile
,
7029 SECT_OFF_TEXT (objfile
), 0);
7033 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
7035 /* Set symtab language to language from DW_AT_language. If the
7036 compilation is from a C file generated by language preprocessors, do
7037 not set the language if it was already deduced by start_subfile. */
7038 if (!(cu
->language
== language_c
&& symtab
->language
!= language_c
))
7039 symtab
->language
= cu
->language
;
7041 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
7042 produce DW_AT_location with location lists but it can be possibly
7043 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
7044 there were bugs in prologue debug info, fixed later in GCC-4.5
7045 by "unwind info for epilogues" patch (which is not directly related).
7047 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
7048 needed, it would be wrong due to missing DW_AT_producer there.
7050 Still one can confuse GDB by using non-standard GCC compilation
7051 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
7053 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
7054 symtab
->locations_valid
= 1;
7056 if (gcc_4_minor
>= 5)
7057 symtab
->epilogue_unwind_valid
= 1;
7059 symtab
->call_site_htab
= cu
->call_site_htab
;
7062 if (dwarf2_per_objfile
->using_index
)
7063 per_cu
->v
.quick
->symtab
= symtab
;
7066 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
7067 pst
->symtab
= symtab
;
7071 /* Push it for inclusion processing later. */
7072 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
7074 do_cleanups (back_to
);
7077 /* Generate full symbol information for type unit PER_CU, whose DIEs have
7078 already been loaded into memory. */
7081 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
7082 enum language pretend_language
)
7084 struct dwarf2_cu
*cu
= per_cu
->cu
;
7085 struct objfile
*objfile
= per_cu
->objfile
;
7086 struct symtab
*symtab
;
7087 struct cleanup
*back_to
, *delayed_list_cleanup
;
7090 back_to
= make_cleanup (really_free_pendings
, NULL
);
7091 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
7093 cu
->list_in_scope
= &file_symbols
;
7095 cu
->language
= pretend_language
;
7096 cu
->language_defn
= language_def (cu
->language
);
7098 /* The symbol tables are set up in read_type_unit_scope. */
7099 process_die (cu
->dies
, cu
);
7101 /* For now fudge the Go package. */
7102 if (cu
->language
== language_go
)
7103 fixup_go_packaging (cu
);
7105 /* Now that we have processed all the DIEs in the CU, all the types
7106 should be complete, and it should now be safe to compute all of the
7108 compute_delayed_physnames (cu
);
7109 do_cleanups (delayed_list_cleanup
);
7111 /* TUs share symbol tables.
7112 If this is the first TU to use this symtab, complete the construction
7113 of it with end_expandable_symtab. Otherwise, complete the addition of
7114 this TU's symbols to the existing symtab. */
7115 if (per_cu
->type_unit_group
->primary_symtab
== NULL
)
7117 symtab
= end_expandable_symtab (0, objfile
, SECT_OFF_TEXT (objfile
));
7118 per_cu
->type_unit_group
->primary_symtab
= symtab
;
7122 /* Set symtab language to language from DW_AT_language. If the
7123 compilation is from a C file generated by language preprocessors,
7124 do not set the language if it was already deduced by
7126 if (!(cu
->language
== language_c
&& symtab
->language
!= language_c
))
7127 symtab
->language
= cu
->language
;
7132 augment_type_symtab (objfile
,
7133 per_cu
->type_unit_group
->primary_symtab
);
7134 symtab
= per_cu
->type_unit_group
->primary_symtab
;
7137 if (dwarf2_per_objfile
->using_index
)
7138 per_cu
->v
.quick
->symtab
= symtab
;
7141 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
7142 pst
->symtab
= symtab
;
7146 do_cleanups (back_to
);
7149 /* Process an imported unit DIE. */
7152 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
7154 struct attribute
*attr
;
7156 /* For now we don't handle imported units in type units. */
7157 if (cu
->per_cu
->is_debug_types
)
7159 error (_("Dwarf Error: DW_TAG_imported_unit is not"
7160 " supported in type units [in module %s]"),
7164 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
7167 struct dwarf2_per_cu_data
*per_cu
;
7168 struct symtab
*imported_symtab
;
7172 offset
= dwarf2_get_ref_die_offset (attr
);
7173 is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
7174 per_cu
= dwarf2_find_containing_comp_unit (offset
, is_dwz
, cu
->objfile
);
7176 /* Queue the unit, if needed. */
7177 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
7178 load_full_comp_unit (per_cu
, cu
->language
);
7180 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
7185 /* Process a die and its children. */
7188 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
7192 case DW_TAG_padding
:
7194 case DW_TAG_compile_unit
:
7195 case DW_TAG_partial_unit
:
7196 read_file_scope (die
, cu
);
7198 case DW_TAG_type_unit
:
7199 read_type_unit_scope (die
, cu
);
7201 case DW_TAG_subprogram
:
7202 case DW_TAG_inlined_subroutine
:
7203 read_func_scope (die
, cu
);
7205 case DW_TAG_lexical_block
:
7206 case DW_TAG_try_block
:
7207 case DW_TAG_catch_block
:
7208 read_lexical_block_scope (die
, cu
);
7210 case DW_TAG_GNU_call_site
:
7211 read_call_site_scope (die
, cu
);
7213 case DW_TAG_class_type
:
7214 case DW_TAG_interface_type
:
7215 case DW_TAG_structure_type
:
7216 case DW_TAG_union_type
:
7217 process_structure_scope (die
, cu
);
7219 case DW_TAG_enumeration_type
:
7220 process_enumeration_scope (die
, cu
);
7223 /* These dies have a type, but processing them does not create
7224 a symbol or recurse to process the children. Therefore we can
7225 read them on-demand through read_type_die. */
7226 case DW_TAG_subroutine_type
:
7227 case DW_TAG_set_type
:
7228 case DW_TAG_array_type
:
7229 case DW_TAG_pointer_type
:
7230 case DW_TAG_ptr_to_member_type
:
7231 case DW_TAG_reference_type
:
7232 case DW_TAG_string_type
:
7235 case DW_TAG_base_type
:
7236 case DW_TAG_subrange_type
:
7237 case DW_TAG_typedef
:
7238 /* Add a typedef symbol for the type definition, if it has a
7240 new_symbol (die
, read_type_die (die
, cu
), cu
);
7242 case DW_TAG_common_block
:
7243 read_common_block (die
, cu
);
7245 case DW_TAG_common_inclusion
:
7247 case DW_TAG_namespace
:
7248 cu
->processing_has_namespace_info
= 1;
7249 read_namespace (die
, cu
);
7252 cu
->processing_has_namespace_info
= 1;
7253 read_module (die
, cu
);
7255 case DW_TAG_imported_declaration
:
7256 case DW_TAG_imported_module
:
7257 cu
->processing_has_namespace_info
= 1;
7258 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
7259 || cu
->language
!= language_fortran
))
7260 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
7261 dwarf_tag_name (die
->tag
));
7262 read_import_statement (die
, cu
);
7265 case DW_TAG_imported_unit
:
7266 process_imported_unit_die (die
, cu
);
7270 new_symbol (die
, NULL
, cu
);
7275 /* A helper function for dwarf2_compute_name which determines whether DIE
7276 needs to have the name of the scope prepended to the name listed in the
7280 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
7282 struct attribute
*attr
;
7286 case DW_TAG_namespace
:
7287 case DW_TAG_typedef
:
7288 case DW_TAG_class_type
:
7289 case DW_TAG_interface_type
:
7290 case DW_TAG_structure_type
:
7291 case DW_TAG_union_type
:
7292 case DW_TAG_enumeration_type
:
7293 case DW_TAG_enumerator
:
7294 case DW_TAG_subprogram
:
7298 case DW_TAG_variable
:
7299 case DW_TAG_constant
:
7300 /* We only need to prefix "globally" visible variables. These include
7301 any variable marked with DW_AT_external or any variable that
7302 lives in a namespace. [Variables in anonymous namespaces
7303 require prefixing, but they are not DW_AT_external.] */
7305 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
7307 struct dwarf2_cu
*spec_cu
= cu
;
7309 return die_needs_namespace (die_specification (die
, &spec_cu
),
7313 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
7314 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
7315 && die
->parent
->tag
!= DW_TAG_module
)
7317 /* A variable in a lexical block of some kind does not need a
7318 namespace, even though in C++ such variables may be external
7319 and have a mangled name. */
7320 if (die
->parent
->tag
== DW_TAG_lexical_block
7321 || die
->parent
->tag
== DW_TAG_try_block
7322 || die
->parent
->tag
== DW_TAG_catch_block
7323 || die
->parent
->tag
== DW_TAG_subprogram
)
7332 /* Retrieve the last character from a mem_file. */
7335 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
7337 char *last_char_p
= (char *) object
;
7340 *last_char_p
= buffer
[length
- 1];
7343 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
7344 compute the physname for the object, which include a method's:
7345 - formal parameters (C++/Java),
7346 - receiver type (Go),
7347 - return type (Java).
7349 The term "physname" is a bit confusing.
7350 For C++, for example, it is the demangled name.
7351 For Go, for example, it's the mangled name.
7353 For Ada, return the DIE's linkage name rather than the fully qualified
7354 name. PHYSNAME is ignored..
7356 The result is allocated on the objfile_obstack and canonicalized. */
7359 dwarf2_compute_name (const char *name
,
7360 struct die_info
*die
, struct dwarf2_cu
*cu
,
7363 struct objfile
*objfile
= cu
->objfile
;
7366 name
= dwarf2_name (die
, cu
);
7368 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
7369 compute it by typename_concat inside GDB. */
7370 if (cu
->language
== language_ada
7371 || (cu
->language
== language_fortran
&& physname
))
7373 /* For Ada unit, we prefer the linkage name over the name, as
7374 the former contains the exported name, which the user expects
7375 to be able to reference. Ideally, we want the user to be able
7376 to reference this entity using either natural or linkage name,
7377 but we haven't started looking at this enhancement yet. */
7378 struct attribute
*attr
;
7380 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
7382 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
7383 if (attr
&& DW_STRING (attr
))
7384 return DW_STRING (attr
);
7387 /* These are the only languages we know how to qualify names in. */
7389 && (cu
->language
== language_cplus
|| cu
->language
== language_java
7390 || cu
->language
== language_fortran
))
7392 if (die_needs_namespace (die
, cu
))
7396 struct ui_file
*buf
;
7398 prefix
= determine_prefix (die
, cu
);
7399 buf
= mem_fileopen ();
7400 if (*prefix
!= '\0')
7402 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
7405 fputs_unfiltered (prefixed_name
, buf
);
7406 xfree (prefixed_name
);
7409 fputs_unfiltered (name
, buf
);
7411 /* Template parameters may be specified in the DIE's DW_AT_name, or
7412 as children with DW_TAG_template_type_param or
7413 DW_TAG_value_type_param. If the latter, add them to the name
7414 here. If the name already has template parameters, then
7415 skip this step; some versions of GCC emit both, and
7416 it is more efficient to use the pre-computed name.
7418 Something to keep in mind about this process: it is very
7419 unlikely, or in some cases downright impossible, to produce
7420 something that will match the mangled name of a function.
7421 If the definition of the function has the same debug info,
7422 we should be able to match up with it anyway. But fallbacks
7423 using the minimal symbol, for instance to find a method
7424 implemented in a stripped copy of libstdc++, will not work.
7425 If we do not have debug info for the definition, we will have to
7426 match them up some other way.
7428 When we do name matching there is a related problem with function
7429 templates; two instantiated function templates are allowed to
7430 differ only by their return types, which we do not add here. */
7432 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
7434 struct attribute
*attr
;
7435 struct die_info
*child
;
7438 die
->building_fullname
= 1;
7440 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
7445 struct dwarf2_locexpr_baton
*baton
;
7448 if (child
->tag
!= DW_TAG_template_type_param
7449 && child
->tag
!= DW_TAG_template_value_param
)
7454 fputs_unfiltered ("<", buf
);
7458 fputs_unfiltered (", ", buf
);
7460 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
7463 complaint (&symfile_complaints
,
7464 _("template parameter missing DW_AT_type"));
7465 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
7468 type
= die_type (child
, cu
);
7470 if (child
->tag
== DW_TAG_template_type_param
)
7472 c_print_type (type
, "", buf
, -1, 0, &type_print_raw_options
);
7476 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
7479 complaint (&symfile_complaints
,
7480 _("template parameter missing "
7481 "DW_AT_const_value"));
7482 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
7486 dwarf2_const_value_attr (attr
, type
, name
,
7487 &cu
->comp_unit_obstack
, cu
,
7488 &value
, &bytes
, &baton
);
7490 if (TYPE_NOSIGN (type
))
7491 /* GDB prints characters as NUMBER 'CHAR'. If that's
7492 changed, this can use value_print instead. */
7493 c_printchar (value
, type
, buf
);
7496 struct value_print_options opts
;
7499 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
7503 else if (bytes
!= NULL
)
7505 v
= allocate_value (type
);
7506 memcpy (value_contents_writeable (v
), bytes
,
7507 TYPE_LENGTH (type
));
7510 v
= value_from_longest (type
, value
);
7512 /* Specify decimal so that we do not depend on
7514 get_formatted_print_options (&opts
, 'd');
7516 value_print (v
, buf
, &opts
);
7522 die
->building_fullname
= 0;
7526 /* Close the argument list, with a space if necessary
7527 (nested templates). */
7528 char last_char
= '\0';
7529 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
7530 if (last_char
== '>')
7531 fputs_unfiltered (" >", buf
);
7533 fputs_unfiltered (">", buf
);
7537 /* For Java and C++ methods, append formal parameter type
7538 information, if PHYSNAME. */
7540 if (physname
&& die
->tag
== DW_TAG_subprogram
7541 && (cu
->language
== language_cplus
7542 || cu
->language
== language_java
))
7544 struct type
*type
= read_type_die (die
, cu
);
7546 c_type_print_args (type
, buf
, 1, cu
->language
,
7547 &type_print_raw_options
);
7549 if (cu
->language
== language_java
)
7551 /* For java, we must append the return type to method
7553 if (die
->tag
== DW_TAG_subprogram
)
7554 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
7555 0, 0, &type_print_raw_options
);
7557 else if (cu
->language
== language_cplus
)
7559 /* Assume that an artificial first parameter is
7560 "this", but do not crash if it is not. RealView
7561 marks unnamed (and thus unused) parameters as
7562 artificial; there is no way to differentiate
7564 if (TYPE_NFIELDS (type
) > 0
7565 && TYPE_FIELD_ARTIFICIAL (type
, 0)
7566 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
7567 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
7569 fputs_unfiltered (" const", buf
);
7573 name
= ui_file_obsavestring (buf
, &objfile
->objfile_obstack
,
7575 ui_file_delete (buf
);
7577 if (cu
->language
== language_cplus
)
7580 = dwarf2_canonicalize_name (name
, cu
,
7581 &objfile
->objfile_obstack
);
7592 /* Return the fully qualified name of DIE, based on its DW_AT_name.
7593 If scope qualifiers are appropriate they will be added. The result
7594 will be allocated on the objfile_obstack, or NULL if the DIE does
7595 not have a name. NAME may either be from a previous call to
7596 dwarf2_name or NULL.
7598 The output string will be canonicalized (if C++/Java). */
7601 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
7603 return dwarf2_compute_name (name
, die
, cu
, 0);
7606 /* Construct a physname for the given DIE in CU. NAME may either be
7607 from a previous call to dwarf2_name or NULL. The result will be
7608 allocated on the objfile_objstack or NULL if the DIE does not have a
7611 The output string will be canonicalized (if C++/Java). */
7614 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
7616 struct objfile
*objfile
= cu
->objfile
;
7617 struct attribute
*attr
;
7618 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
7619 struct cleanup
*back_to
;
7622 /* In this case dwarf2_compute_name is just a shortcut not building anything
7624 if (!die_needs_namespace (die
, cu
))
7625 return dwarf2_compute_name (name
, die
, cu
, 1);
7627 back_to
= make_cleanup (null_cleanup
, NULL
);
7629 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
7631 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
7633 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
7635 if (attr
&& DW_STRING (attr
))
7639 mangled
= DW_STRING (attr
);
7641 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
7642 type. It is easier for GDB users to search for such functions as
7643 `name(params)' than `long name(params)'. In such case the minimal
7644 symbol names do not match the full symbol names but for template
7645 functions there is never a need to look up their definition from their
7646 declaration so the only disadvantage remains the minimal symbol
7647 variant `long name(params)' does not have the proper inferior type.
7650 if (cu
->language
== language_go
)
7652 /* This is a lie, but we already lie to the caller new_symbol_full.
7653 new_symbol_full assumes we return the mangled name.
7654 This just undoes that lie until things are cleaned up. */
7659 demangled
= cplus_demangle (mangled
,
7660 (DMGL_PARAMS
| DMGL_ANSI
7661 | (cu
->language
== language_java
7662 ? DMGL_JAVA
| DMGL_RET_POSTFIX
7667 make_cleanup (xfree
, demangled
);
7677 if (canon
== NULL
|| check_physname
)
7679 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
7681 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
7683 /* It may not mean a bug in GDB. The compiler could also
7684 compute DW_AT_linkage_name incorrectly. But in such case
7685 GDB would need to be bug-to-bug compatible. */
7687 complaint (&symfile_complaints
,
7688 _("Computed physname <%s> does not match demangled <%s> "
7689 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
7690 physname
, canon
, mangled
, die
->offset
.sect_off
, objfile
->name
);
7692 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
7693 is available here - over computed PHYSNAME. It is safer
7694 against both buggy GDB and buggy compilers. */
7708 retval
= obstack_copy0 (&objfile
->objfile_obstack
, retval
, strlen (retval
));
7710 do_cleanups (back_to
);
7714 /* Read the import statement specified by the given die and record it. */
7717 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
7719 struct objfile
*objfile
= cu
->objfile
;
7720 struct attribute
*import_attr
;
7721 struct die_info
*imported_die
, *child_die
;
7722 struct dwarf2_cu
*imported_cu
;
7723 const char *imported_name
;
7724 const char *imported_name_prefix
;
7725 const char *canonical_name
;
7726 const char *import_alias
;
7727 const char *imported_declaration
= NULL
;
7728 const char *import_prefix
;
7729 VEC (const_char_ptr
) *excludes
= NULL
;
7730 struct cleanup
*cleanups
;
7732 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
7733 if (import_attr
== NULL
)
7735 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
7736 dwarf_tag_name (die
->tag
));
7741 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
7742 imported_name
= dwarf2_name (imported_die
, imported_cu
);
7743 if (imported_name
== NULL
)
7745 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
7747 The import in the following code:
7761 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
7762 <52> DW_AT_decl_file : 1
7763 <53> DW_AT_decl_line : 6
7764 <54> DW_AT_import : <0x75>
7765 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
7767 <5b> DW_AT_decl_file : 1
7768 <5c> DW_AT_decl_line : 2
7769 <5d> DW_AT_type : <0x6e>
7771 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
7772 <76> DW_AT_byte_size : 4
7773 <77> DW_AT_encoding : 5 (signed)
7775 imports the wrong die ( 0x75 instead of 0x58 ).
7776 This case will be ignored until the gcc bug is fixed. */
7780 /* Figure out the local name after import. */
7781 import_alias
= dwarf2_name (die
, cu
);
7783 /* Figure out where the statement is being imported to. */
7784 import_prefix
= determine_prefix (die
, cu
);
7786 /* Figure out what the scope of the imported die is and prepend it
7787 to the name of the imported die. */
7788 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
7790 if (imported_die
->tag
!= DW_TAG_namespace
7791 && imported_die
->tag
!= DW_TAG_module
)
7793 imported_declaration
= imported_name
;
7794 canonical_name
= imported_name_prefix
;
7796 else if (strlen (imported_name_prefix
) > 0)
7797 canonical_name
= obconcat (&objfile
->objfile_obstack
,
7798 imported_name_prefix
, "::", imported_name
,
7801 canonical_name
= imported_name
;
7803 cleanups
= make_cleanup (VEC_cleanup (const_char_ptr
), &excludes
);
7805 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
7806 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
7807 child_die
= sibling_die (child_die
))
7809 /* DWARF-4: A Fortran use statement with a “rename list” may be
7810 represented by an imported module entry with an import attribute
7811 referring to the module and owned entries corresponding to those
7812 entities that are renamed as part of being imported. */
7814 if (child_die
->tag
!= DW_TAG_imported_declaration
)
7816 complaint (&symfile_complaints
,
7817 _("child DW_TAG_imported_declaration expected "
7818 "- DIE at 0x%x [in module %s]"),
7819 child_die
->offset
.sect_off
, objfile
->name
);
7823 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
7824 if (import_attr
== NULL
)
7826 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
7827 dwarf_tag_name (child_die
->tag
));
7832 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
7834 imported_name
= dwarf2_name (imported_die
, imported_cu
);
7835 if (imported_name
== NULL
)
7837 complaint (&symfile_complaints
,
7838 _("child DW_TAG_imported_declaration has unknown "
7839 "imported name - DIE at 0x%x [in module %s]"),
7840 child_die
->offset
.sect_off
, objfile
->name
);
7844 VEC_safe_push (const_char_ptr
, excludes
, imported_name
);
7846 process_die (child_die
, cu
);
7849 cp_add_using_directive (import_prefix
,
7852 imported_declaration
,
7855 &objfile
->objfile_obstack
);
7857 do_cleanups (cleanups
);
7860 /* Cleanup function for handle_DW_AT_stmt_list. */
7863 free_cu_line_header (void *arg
)
7865 struct dwarf2_cu
*cu
= arg
;
7867 free_line_header (cu
->line_header
);
7868 cu
->line_header
= NULL
;
7871 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
7872 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
7873 this, it was first present in GCC release 4.3.0. */
7876 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
7878 if (!cu
->checked_producer
)
7879 check_producer (cu
);
7881 return cu
->producer_is_gcc_lt_4_3
;
7885 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
7886 const char **name
, const char **comp_dir
)
7888 struct attribute
*attr
;
7893 /* Find the filename. Do not use dwarf2_name here, since the filename
7894 is not a source language identifier. */
7895 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
7898 *name
= DW_STRING (attr
);
7901 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
7903 *comp_dir
= DW_STRING (attr
);
7904 else if (producer_is_gcc_lt_4_3 (cu
) && *name
!= NULL
7905 && IS_ABSOLUTE_PATH (*name
))
7907 char *d
= ldirname (*name
);
7911 make_cleanup (xfree
, d
);
7913 if (*comp_dir
!= NULL
)
7915 /* Irix 6.2 native cc prepends <machine>.: to the compilation
7916 directory, get rid of it. */
7917 char *cp
= strchr (*comp_dir
, ':');
7919 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
7924 *name
= "<unknown>";
7927 /* Handle DW_AT_stmt_list for a compilation unit.
7928 DIE is the DW_TAG_compile_unit die for CU.
7929 COMP_DIR is the compilation directory.
7930 WANT_LINE_INFO is non-zero if the pc/line-number mapping is needed. */
7933 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
7934 const char *comp_dir
)
7936 struct attribute
*attr
;
7938 gdb_assert (! cu
->per_cu
->is_debug_types
);
7940 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
7943 unsigned int line_offset
= DW_UNSND (attr
);
7944 struct line_header
*line_header
7945 = dwarf_decode_line_header (line_offset
, cu
);
7949 cu
->line_header
= line_header
;
7950 make_cleanup (free_cu_line_header
, cu
);
7951 dwarf_decode_lines (line_header
, comp_dir
, cu
, NULL
, 1);
7956 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
7959 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
7961 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7962 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
7963 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
7964 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
7965 struct attribute
*attr
;
7966 const char *name
= NULL
;
7967 const char *comp_dir
= NULL
;
7968 struct die_info
*child_die
;
7969 bfd
*abfd
= objfile
->obfd
;
7972 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7974 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
7976 /* If we didn't find a lowpc, set it to highpc to avoid complaints
7977 from finish_block. */
7978 if (lowpc
== ((CORE_ADDR
) -1))
7983 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
7985 prepare_one_comp_unit (cu
, die
, cu
->language
);
7987 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
7988 standardised yet. As a workaround for the language detection we fall
7989 back to the DW_AT_producer string. */
7990 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
7991 cu
->language
= language_opencl
;
7993 /* Similar hack for Go. */
7994 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
7995 set_cu_language (DW_LANG_Go
, cu
);
7997 dwarf2_start_symtab (cu
, name
, comp_dir
, lowpc
);
7999 /* Decode line number information if present. We do this before
8000 processing child DIEs, so that the line header table is available
8001 for DW_AT_decl_file. */
8002 handle_DW_AT_stmt_list (die
, cu
, comp_dir
);
8004 /* Process all dies in compilation unit. */
8005 if (die
->child
!= NULL
)
8007 child_die
= die
->child
;
8008 while (child_die
&& child_die
->tag
)
8010 process_die (child_die
, cu
);
8011 child_die
= sibling_die (child_die
);
8015 /* Decode macro information, if present. Dwarf 2 macro information
8016 refers to information in the line number info statement program
8017 header, so we can only read it if we've read the header
8019 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
8020 if (attr
&& cu
->line_header
)
8022 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
8023 complaint (&symfile_complaints
,
8024 _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
8026 dwarf_decode_macros (cu
, DW_UNSND (attr
), comp_dir
, 1);
8030 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
8031 if (attr
&& cu
->line_header
)
8033 unsigned int macro_offset
= DW_UNSND (attr
);
8035 dwarf_decode_macros (cu
, macro_offset
, comp_dir
, 0);
8039 do_cleanups (back_to
);
8042 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
8043 Create the set of symtabs used by this TU, or if this TU is sharing
8044 symtabs with another TU and the symtabs have already been created
8045 then restore those symtabs in the line header.
8046 We don't need the pc/line-number mapping for type units. */
8049 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
8051 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8052 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
8053 struct type_unit_group
*tu_group
;
8055 struct line_header
*lh
;
8056 struct attribute
*attr
;
8057 unsigned int i
, line_offset
;
8059 gdb_assert (per_cu
->is_debug_types
);
8061 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
8063 /* If we're using .gdb_index (includes -readnow) then
8064 per_cu->s.type_unit_group may not have been set up yet. */
8065 if (per_cu
->type_unit_group
== NULL
)
8066 per_cu
->type_unit_group
= get_type_unit_group (cu
, attr
);
8067 tu_group
= per_cu
->type_unit_group
;
8069 /* If we've already processed this stmt_list there's no real need to
8070 do it again, we could fake it and just recreate the part we need
8071 (file name,index -> symtab mapping). If data shows this optimization
8072 is useful we can do it then. */
8073 first_time
= tu_group
->primary_symtab
== NULL
;
8075 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
8080 line_offset
= DW_UNSND (attr
);
8081 lh
= dwarf_decode_line_header (line_offset
, cu
);
8086 dwarf2_start_symtab (cu
, "", NULL
, 0);
8089 gdb_assert (tu_group
->symtabs
== NULL
);
8092 /* Note: The primary symtab will get allocated at the end. */
8096 cu
->line_header
= lh
;
8097 make_cleanup (free_cu_line_header
, cu
);
8101 dwarf2_start_symtab (cu
, "", NULL
, 0);
8103 tu_group
->num_symtabs
= lh
->num_file_names
;
8104 tu_group
->symtabs
= XNEWVEC (struct symtab
*, lh
->num_file_names
);
8106 for (i
= 0; i
< lh
->num_file_names
; ++i
)
8109 struct file_entry
*fe
= &lh
->file_names
[i
];
8112 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
8113 dwarf2_start_subfile (fe
->name
, dir
, NULL
);
8115 /* Note: We don't have to watch for the main subfile here, type units
8116 don't have DW_AT_name. */
8118 if (current_subfile
->symtab
== NULL
)
8120 /* NOTE: start_subfile will recognize when it's been passed
8121 a file it has already seen. So we can't assume there's a
8122 simple mapping from lh->file_names to subfiles,
8123 lh->file_names may contain dups. */
8124 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
8128 fe
->symtab
= current_subfile
->symtab
;
8129 tu_group
->symtabs
[i
] = fe
->symtab
;
8136 for (i
= 0; i
< lh
->num_file_names
; ++i
)
8138 struct file_entry
*fe
= &lh
->file_names
[i
];
8140 fe
->symtab
= tu_group
->symtabs
[i
];
8144 /* The main symtab is allocated last. Type units don't have DW_AT_name
8145 so they don't have a "real" (so to speak) symtab anyway.
8146 There is later code that will assign the main symtab to all symbols
8147 that don't have one. We need to handle the case of a symbol with a
8148 missing symtab (DW_AT_decl_file) anyway. */
8151 /* Process DW_TAG_type_unit.
8152 For TUs we want to skip the first top level sibling if it's not the
8153 actual type being defined by this TU. In this case the first top
8154 level sibling is there to provide context only. */
8157 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
8159 struct die_info
*child_die
;
8161 prepare_one_comp_unit (cu
, die
, language_minimal
);
8163 /* Initialize (or reinitialize) the machinery for building symtabs.
8164 We do this before processing child DIEs, so that the line header table
8165 is available for DW_AT_decl_file. */
8166 setup_type_unit_groups (die
, cu
);
8168 if (die
->child
!= NULL
)
8170 child_die
= die
->child
;
8171 while (child_die
&& child_die
->tag
)
8173 process_die (child_die
, cu
);
8174 child_die
= sibling_die (child_die
);
8181 http://gcc.gnu.org/wiki/DebugFission
8182 http://gcc.gnu.org/wiki/DebugFissionDWP
8184 To simplify handling of both DWO files ("object" files with the DWARF info)
8185 and DWP files (a file with the DWOs packaged up into one file), we treat
8186 DWP files as having a collection of virtual DWO files. */
8189 hash_dwo_file (const void *item
)
8191 const struct dwo_file
*dwo_file
= item
;
8193 return htab_hash_string (dwo_file
->name
);
8197 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
8199 const struct dwo_file
*lhs
= item_lhs
;
8200 const struct dwo_file
*rhs
= item_rhs
;
8202 return strcmp (lhs
->name
, rhs
->name
) == 0;
8205 /* Allocate a hash table for DWO files. */
8208 allocate_dwo_file_hash_table (void)
8210 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8212 return htab_create_alloc_ex (41,
8216 &objfile
->objfile_obstack
,
8217 hashtab_obstack_allocate
,
8218 dummy_obstack_deallocate
);
8221 /* Lookup DWO file DWO_NAME. */
8224 lookup_dwo_file_slot (const char *dwo_name
)
8226 struct dwo_file find_entry
;
8229 if (dwarf2_per_objfile
->dwo_files
== NULL
)
8230 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
8232 memset (&find_entry
, 0, sizeof (find_entry
));
8233 find_entry
.name
= dwo_name
;
8234 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
8240 hash_dwo_unit (const void *item
)
8242 const struct dwo_unit
*dwo_unit
= item
;
8244 /* This drops the top 32 bits of the id, but is ok for a hash. */
8245 return dwo_unit
->signature
;
8249 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
8251 const struct dwo_unit
*lhs
= item_lhs
;
8252 const struct dwo_unit
*rhs
= item_rhs
;
8254 /* The signature is assumed to be unique within the DWO file.
8255 So while object file CU dwo_id's always have the value zero,
8256 that's OK, assuming each object file DWO file has only one CU,
8257 and that's the rule for now. */
8258 return lhs
->signature
== rhs
->signature
;
8261 /* Allocate a hash table for DWO CUs,TUs.
8262 There is one of these tables for each of CUs,TUs for each DWO file. */
8265 allocate_dwo_unit_table (struct objfile
*objfile
)
8267 /* Start out with a pretty small number.
8268 Generally DWO files contain only one CU and maybe some TUs. */
8269 return htab_create_alloc_ex (3,
8273 &objfile
->objfile_obstack
,
8274 hashtab_obstack_allocate
,
8275 dummy_obstack_deallocate
);
8278 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
8280 struct create_dwo_info_table_data
8282 struct dwo_file
*dwo_file
;
8286 /* die_reader_func for create_dwo_debug_info_hash_table. */
8289 create_dwo_debug_info_hash_table_reader (const struct die_reader_specs
*reader
,
8291 struct die_info
*comp_unit_die
,
8295 struct dwarf2_cu
*cu
= reader
->cu
;
8296 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8297 sect_offset offset
= cu
->per_cu
->offset
;
8298 struct dwarf2_section_info
*section
= cu
->per_cu
->info_or_types_section
;
8299 struct create_dwo_info_table_data
*data
= datap
;
8300 struct dwo_file
*dwo_file
= data
->dwo_file
;
8301 htab_t cu_htab
= data
->cu_htab
;
8303 struct attribute
*attr
;
8304 struct dwo_unit
*dwo_unit
;
8306 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
8309 error (_("Dwarf Error: debug entry at offset 0x%x is missing"
8310 " its dwo_id [in module %s]"),
8311 offset
.sect_off
, dwo_file
->name
);
8315 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
8316 dwo_unit
->dwo_file
= dwo_file
;
8317 dwo_unit
->signature
= DW_UNSND (attr
);
8318 dwo_unit
->info_or_types_section
= section
;
8319 dwo_unit
->offset
= offset
;
8320 dwo_unit
->length
= cu
->per_cu
->length
;
8322 slot
= htab_find_slot (cu_htab
, dwo_unit
, INSERT
);
8323 gdb_assert (slot
!= NULL
);
8326 const struct dwo_unit
*dup_dwo_unit
= *slot
;
8328 complaint (&symfile_complaints
,
8329 _("debug entry at offset 0x%x is duplicate to the entry at"
8330 " offset 0x%x, dwo_id 0x%s [in module %s]"),
8331 offset
.sect_off
, dup_dwo_unit
->offset
.sect_off
,
8332 phex (dwo_unit
->signature
, sizeof (dwo_unit
->signature
)),
8338 if (dwarf2_read_debug
)
8339 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, dwo_id 0x%s\n",
8341 phex (dwo_unit
->signature
,
8342 sizeof (dwo_unit
->signature
)));
8345 /* Create a hash table to map DWO IDs to their CU entry in
8346 .debug_info.dwo in DWO_FILE.
8347 Note: This function processes DWO files only, not DWP files. */
8350 create_dwo_debug_info_hash_table (struct dwo_file
*dwo_file
)
8352 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8353 struct dwarf2_section_info
*section
= &dwo_file
->sections
.info
;
8356 gdb_byte
*info_ptr
, *end_ptr
;
8357 struct create_dwo_info_table_data create_dwo_info_table_data
;
8359 dwarf2_read_section (objfile
, section
);
8360 info_ptr
= section
->buffer
;
8362 if (info_ptr
== NULL
)
8365 /* We can't set abfd until now because the section may be empty or
8366 not present, in which case section->asection will be NULL. */
8367 abfd
= section
->asection
->owner
;
8369 if (dwarf2_read_debug
)
8370 fprintf_unfiltered (gdb_stdlog
, "Reading .debug_info.dwo for %s:\n",
8371 bfd_get_filename (abfd
));
8373 cu_htab
= allocate_dwo_unit_table (objfile
);
8375 create_dwo_info_table_data
.dwo_file
= dwo_file
;
8376 create_dwo_info_table_data
.cu_htab
= cu_htab
;
8378 end_ptr
= info_ptr
+ section
->size
;
8379 while (info_ptr
< end_ptr
)
8381 struct dwarf2_per_cu_data per_cu
;
8383 memset (&per_cu
, 0, sizeof (per_cu
));
8384 per_cu
.objfile
= objfile
;
8385 per_cu
.is_debug_types
= 0;
8386 per_cu
.offset
.sect_off
= info_ptr
- section
->buffer
;
8387 per_cu
.info_or_types_section
= section
;
8389 init_cutu_and_read_dies_no_follow (&per_cu
,
8390 &dwo_file
->sections
.abbrev
,
8392 create_dwo_debug_info_hash_table_reader
,
8393 &create_dwo_info_table_data
);
8395 info_ptr
+= per_cu
.length
;
8401 /* DWP file .debug_{cu,tu}_index section format:
8402 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
8404 Both index sections have the same format, and serve to map a 64-bit
8405 signature to a set of section numbers. Each section begins with a header,
8406 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
8407 indexes, and a pool of 32-bit section numbers. The index sections will be
8408 aligned at 8-byte boundaries in the file.
8410 The index section header contains two unsigned 32-bit values (using the
8411 byte order of the application binary):
8413 N, the number of compilation units or type units in the index
8414 M, the number of slots in the hash table
8416 (We assume that N and M will not exceed 2^32 - 1.)
8418 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
8420 The hash table begins at offset 8 in the section, and consists of an array
8421 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
8422 order of the application binary). Unused slots in the hash table are 0.
8423 (We rely on the extreme unlikeliness of a signature being exactly 0.)
8425 The parallel table begins immediately after the hash table
8426 (at offset 8 + 8 * M from the beginning of the section), and consists of an
8427 array of 32-bit indexes (using the byte order of the application binary),
8428 corresponding 1-1 with slots in the hash table. Each entry in the parallel
8429 table contains a 32-bit index into the pool of section numbers. For unused
8430 hash table slots, the corresponding entry in the parallel table will be 0.
8432 Given a 64-bit compilation unit signature or a type signature S, an entry
8433 in the hash table is located as follows:
8435 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
8436 the low-order k bits all set to 1.
8438 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
8440 3) If the hash table entry at index H matches the signature, use that
8441 entry. If the hash table entry at index H is unused (all zeroes),
8442 terminate the search: the signature is not present in the table.
8444 4) Let H = (H + H') modulo M. Repeat at Step 3.
8446 Because M > N and H' and M are relatively prime, the search is guaranteed
8447 to stop at an unused slot or find the match.
8449 The pool of section numbers begins immediately following the hash table
8450 (at offset 8 + 12 * M from the beginning of the section). The pool of
8451 section numbers consists of an array of 32-bit words (using the byte order
8452 of the application binary). Each item in the array is indexed starting
8453 from 0. The hash table entry provides the index of the first section
8454 number in the set. Additional section numbers in the set follow, and the
8455 set is terminated by a 0 entry (section number 0 is not used in ELF).
8457 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
8458 section must be the first entry in the set, and the .debug_abbrev.dwo must
8459 be the second entry. Other members of the set may follow in any order. */
8461 /* Create a hash table to map DWO IDs to their CU/TU entry in
8462 .debug_{info,types}.dwo in DWP_FILE.
8463 Returns NULL if there isn't one.
8464 Note: This function processes DWP files only, not DWO files. */
8466 static struct dwp_hash_table
*
8467 create_dwp_hash_table (struct dwp_file
*dwp_file
, int is_debug_types
)
8469 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8470 bfd
*dbfd
= dwp_file
->dbfd
;
8471 char *index_ptr
, *index_end
;
8472 struct dwarf2_section_info
*index
;
8473 uint32_t version
, nr_units
, nr_slots
;
8474 struct dwp_hash_table
*htab
;
8477 index
= &dwp_file
->sections
.tu_index
;
8479 index
= &dwp_file
->sections
.cu_index
;
8481 if (dwarf2_section_empty_p (index
))
8483 dwarf2_read_section (objfile
, index
);
8485 index_ptr
= index
->buffer
;
8486 index_end
= index_ptr
+ index
->size
;
8488 version
= read_4_bytes (dbfd
, index_ptr
);
8489 index_ptr
+= 8; /* Skip the unused word. */
8490 nr_units
= read_4_bytes (dbfd
, index_ptr
);
8492 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
8497 error (_("Dwarf Error: unsupported DWP file version (%u)"
8499 version
, dwp_file
->name
);
8501 if (nr_slots
!= (nr_slots
& -nr_slots
))
8503 error (_("Dwarf Error: number of slots in DWP hash table (%u)"
8504 " is not power of 2 [in module %s]"),
8505 nr_slots
, dwp_file
->name
);
8508 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
8509 htab
->nr_units
= nr_units
;
8510 htab
->nr_slots
= nr_slots
;
8511 htab
->hash_table
= index_ptr
;
8512 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
8513 htab
->section_pool
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
8518 /* Update SECTIONS with the data from SECTP.
8520 This function is like the other "locate" section routines that are
8521 passed to bfd_map_over_sections, but in this context the sections to
8522 read comes from the DWP hash table, not the full ELF section table.
8524 The result is non-zero for success, or zero if an error was found. */
8527 locate_virtual_dwo_sections (asection
*sectp
,
8528 struct virtual_dwo_sections
*sections
)
8530 const struct dwop_section_names
*names
= &dwop_section_names
;
8532 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
8534 /* There can be only one. */
8535 if (sections
->abbrev
.asection
!= NULL
)
8537 sections
->abbrev
.asection
= sectp
;
8538 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
8540 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
8541 || section_is_p (sectp
->name
, &names
->types_dwo
))
8543 /* There can be only one. */
8544 if (sections
->info_or_types
.asection
!= NULL
)
8546 sections
->info_or_types
.asection
= sectp
;
8547 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
8549 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
8551 /* There can be only one. */
8552 if (sections
->line
.asection
!= NULL
)
8554 sections
->line
.asection
= sectp
;
8555 sections
->line
.size
= bfd_get_section_size (sectp
);
8557 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
8559 /* There can be only one. */
8560 if (sections
->loc
.asection
!= NULL
)
8562 sections
->loc
.asection
= sectp
;
8563 sections
->loc
.size
= bfd_get_section_size (sectp
);
8565 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
8567 /* There can be only one. */
8568 if (sections
->macinfo
.asection
!= NULL
)
8570 sections
->macinfo
.asection
= sectp
;
8571 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
8573 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
8575 /* There can be only one. */
8576 if (sections
->macro
.asection
!= NULL
)
8578 sections
->macro
.asection
= sectp
;
8579 sections
->macro
.size
= bfd_get_section_size (sectp
);
8581 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
8583 /* There can be only one. */
8584 if (sections
->str_offsets
.asection
!= NULL
)
8586 sections
->str_offsets
.asection
= sectp
;
8587 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
8591 /* No other kind of section is valid. */
8598 /* Create a dwo_unit object for the DWO with signature SIGNATURE.
8599 HTAB is the hash table from the DWP file.
8600 SECTION_INDEX is the index of the DWO in HTAB. */
8602 static struct dwo_unit
*
8603 create_dwo_in_dwp (struct dwp_file
*dwp_file
,
8604 const struct dwp_hash_table
*htab
,
8605 uint32_t section_index
,
8606 ULONGEST signature
, int is_debug_types
)
8608 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8609 bfd
*dbfd
= dwp_file
->dbfd
;
8610 const char *kind
= is_debug_types
? "TU" : "CU";
8611 struct dwo_file
*dwo_file
;
8612 struct dwo_unit
*dwo_unit
;
8613 struct virtual_dwo_sections sections
;
8614 void **dwo_file_slot
;
8615 char *virtual_dwo_name
;
8616 struct dwarf2_section_info
*cutu
;
8617 struct cleanup
*cleanups
;
8620 if (dwarf2_read_debug
)
8622 fprintf_unfiltered (gdb_stdlog
, "Reading %s %u/0x%s in DWP file: %s\n",
8624 section_index
, phex (signature
, sizeof (signature
)),
8628 /* Fetch the sections of this DWO.
8629 Put a limit on the number of sections we look for so that bad data
8630 doesn't cause us to loop forever. */
8632 #define MAX_NR_DWO_SECTIONS \
8633 (1 /* .debug_info or .debug_types */ \
8634 + 1 /* .debug_abbrev */ \
8635 + 1 /* .debug_line */ \
8636 + 1 /* .debug_loc */ \
8637 + 1 /* .debug_str_offsets */ \
8638 + 1 /* .debug_macro */ \
8639 + 1 /* .debug_macinfo */ \
8640 + 1 /* trailing zero */)
8642 memset (§ions
, 0, sizeof (sections
));
8643 cleanups
= make_cleanup (null_cleanup
, 0);
8645 for (i
= 0; i
< MAX_NR_DWO_SECTIONS
; ++i
)
8648 uint32_t section_nr
=
8651 + (section_index
+ i
) * sizeof (uint32_t));
8653 if (section_nr
== 0)
8655 if (section_nr
>= dwp_file
->num_sections
)
8657 error (_("Dwarf Error: bad DWP hash table, section number too large"
8662 sectp
= dwp_file
->elf_sections
[section_nr
];
8663 if (! locate_virtual_dwo_sections (sectp
, §ions
))
8665 error (_("Dwarf Error: bad DWP hash table, invalid section found"
8672 || sections
.info_or_types
.asection
== NULL
8673 || sections
.abbrev
.asection
== NULL
)
8675 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
8679 if (i
== MAX_NR_DWO_SECTIONS
)
8681 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
8686 /* It's easier for the rest of the code if we fake a struct dwo_file and
8687 have dwo_unit "live" in that. At least for now.
8689 The DWP file can be made up of a random collection of CUs and TUs.
8690 However, for each CU + set of TUs that came from the same original DWO
8691 file, we want to combine them back into a virtual DWO file to save space
8692 (fewer struct dwo_file objects to allocated). Remember that for really
8693 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
8696 xstrprintf ("virtual-dwo/%d-%d-%d-%d",
8697 sections
.abbrev
.asection
? sections
.abbrev
.asection
->id
: 0,
8698 sections
.line
.asection
? sections
.line
.asection
->id
: 0,
8699 sections
.loc
.asection
? sections
.loc
.asection
->id
: 0,
8700 (sections
.str_offsets
.asection
8701 ? sections
.str_offsets
.asection
->id
8703 make_cleanup (xfree
, virtual_dwo_name
);
8704 /* Can we use an existing virtual DWO file? */
8705 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
);
8706 /* Create one if necessary. */
8707 if (*dwo_file_slot
== NULL
)
8709 if (dwarf2_read_debug
)
8711 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
8714 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
8715 dwo_file
->name
= obstack_copy0 (&objfile
->objfile_obstack
,
8717 strlen (virtual_dwo_name
));
8718 dwo_file
->sections
.abbrev
= sections
.abbrev
;
8719 dwo_file
->sections
.line
= sections
.line
;
8720 dwo_file
->sections
.loc
= sections
.loc
;
8721 dwo_file
->sections
.macinfo
= sections
.macinfo
;
8722 dwo_file
->sections
.macro
= sections
.macro
;
8723 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
8724 /* The "str" section is global to the entire DWP file. */
8725 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
8726 /* The info or types section is assigned later to dwo_unit,
8727 there's no need to record it in dwo_file.
8728 Also, we can't simply record type sections in dwo_file because
8729 we record a pointer into the vector in dwo_unit. As we collect more
8730 types we'll grow the vector and eventually have to reallocate space
8731 for it, invalidating all the pointers into the current copy. */
8732 *dwo_file_slot
= dwo_file
;
8736 if (dwarf2_read_debug
)
8738 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
8741 dwo_file
= *dwo_file_slot
;
8743 do_cleanups (cleanups
);
8745 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
8746 dwo_unit
->dwo_file
= dwo_file
;
8747 dwo_unit
->signature
= signature
;
8748 dwo_unit
->info_or_types_section
=
8749 obstack_alloc (&objfile
->objfile_obstack
,
8750 sizeof (struct dwarf2_section_info
));
8751 *dwo_unit
->info_or_types_section
= sections
.info_or_types
;
8752 /* offset, length, type_offset_in_tu are set later. */
8757 /* Lookup the DWO with SIGNATURE in DWP_FILE. */
8759 static struct dwo_unit
*
8760 lookup_dwo_in_dwp (struct dwp_file
*dwp_file
,
8761 const struct dwp_hash_table
*htab
,
8762 ULONGEST signature
, int is_debug_types
)
8764 bfd
*dbfd
= dwp_file
->dbfd
;
8765 uint32_t mask
= htab
->nr_slots
- 1;
8766 uint32_t hash
= signature
& mask
;
8767 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
8770 struct dwo_unit find_dwo_cu
, *dwo_cu
;
8772 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
8773 find_dwo_cu
.signature
= signature
;
8774 slot
= htab_find_slot (dwp_file
->loaded_cutus
, &find_dwo_cu
, INSERT
);
8779 /* Use a for loop so that we don't loop forever on bad debug info. */
8780 for (i
= 0; i
< htab
->nr_slots
; ++i
)
8782 ULONGEST signature_in_table
;
8784 signature_in_table
=
8785 read_8_bytes (dbfd
, htab
->hash_table
+ hash
* sizeof (uint64_t));
8786 if (signature_in_table
== signature
)
8788 uint32_t section_index
=
8789 read_4_bytes (dbfd
, htab
->unit_table
+ hash
* sizeof (uint32_t));
8791 *slot
= create_dwo_in_dwp (dwp_file
, htab
, section_index
,
8792 signature
, is_debug_types
);
8795 if (signature_in_table
== 0)
8797 hash
= (hash
+ hash2
) & mask
;
8800 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
8805 /* Subroutine of open_dwop_file to simplify it.
8806 Open the file specified by FILE_NAME and hand it off to BFD for
8807 preliminary analysis. Return a newly initialized bfd *, which
8808 includes a canonicalized copy of FILE_NAME.
8809 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
8810 In case of trouble, return NULL.
8811 NOTE: This function is derived from symfile_bfd_open. */
8814 try_open_dwop_file (const char *file_name
, int is_dwp
)
8818 char *absolute_name
;
8820 flags
= OPF_TRY_CWD_FIRST
;
8822 flags
|= OPF_SEARCH_IN_PATH
;
8823 desc
= openp (debug_file_directory
, flags
, file_name
,
8824 O_RDONLY
| O_BINARY
, &absolute_name
);
8828 sym_bfd
= gdb_bfd_open (absolute_name
, gnutarget
, desc
);
8831 xfree (absolute_name
);
8834 xfree (absolute_name
);
8835 bfd_set_cacheable (sym_bfd
, 1);
8837 if (!bfd_check_format (sym_bfd
, bfd_object
))
8839 gdb_bfd_unref (sym_bfd
); /* This also closes desc. */
8846 /* Try to open DWO/DWP file FILE_NAME.
8847 COMP_DIR is the DW_AT_comp_dir attribute.
8848 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
8849 The result is the bfd handle of the file.
8850 If there is a problem finding or opening the file, return NULL.
8851 Upon success, the canonicalized path of the file is stored in the bfd,
8852 same as symfile_bfd_open. */
8855 open_dwop_file (const char *file_name
, const char *comp_dir
, int is_dwp
)
8859 if (IS_ABSOLUTE_PATH (file_name
))
8860 return try_open_dwop_file (file_name
, is_dwp
);
8862 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
8864 if (comp_dir
!= NULL
)
8866 char *path_to_try
= concat (comp_dir
, SLASH_STRING
, file_name
, NULL
);
8868 /* NOTE: If comp_dir is a relative path, this will also try the
8869 search path, which seems useful. */
8870 abfd
= try_open_dwop_file (path_to_try
, is_dwp
);
8871 xfree (path_to_try
);
8876 /* That didn't work, try debug-file-directory, which, despite its name,
8877 is a list of paths. */
8879 if (*debug_file_directory
== '\0')
8882 return try_open_dwop_file (file_name
, is_dwp
);
8885 /* This function is mapped across the sections and remembers the offset and
8886 size of each of the DWO debugging sections we are interested in. */
8889 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
8891 struct dwo_sections
*dwo_sections
= dwo_sections_ptr
;
8892 const struct dwop_section_names
*names
= &dwop_section_names
;
8894 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
8896 dwo_sections
->abbrev
.asection
= sectp
;
8897 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
8899 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
8901 dwo_sections
->info
.asection
= sectp
;
8902 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
8904 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
8906 dwo_sections
->line
.asection
= sectp
;
8907 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
8909 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
8911 dwo_sections
->loc
.asection
= sectp
;
8912 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
8914 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
8916 dwo_sections
->macinfo
.asection
= sectp
;
8917 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
8919 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
8921 dwo_sections
->macro
.asection
= sectp
;
8922 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
8924 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
8926 dwo_sections
->str
.asection
= sectp
;
8927 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
8929 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
8931 dwo_sections
->str_offsets
.asection
= sectp
;
8932 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
8934 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
8936 struct dwarf2_section_info type_section
;
8938 memset (&type_section
, 0, sizeof (type_section
));
8939 type_section
.asection
= sectp
;
8940 type_section
.size
= bfd_get_section_size (sectp
);
8941 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
8946 /* Initialize the use of the DWO file specified by DWO_NAME.
8947 The result is NULL if DWO_NAME can't be found. */
8949 static struct dwo_file
*
8950 open_and_init_dwo_file (const char *dwo_name
, const char *comp_dir
)
8952 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8953 struct dwo_file
*dwo_file
;
8955 struct cleanup
*cleanups
;
8957 dbfd
= open_dwop_file (dwo_name
, comp_dir
, 0);
8960 if (dwarf2_read_debug
)
8961 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
8964 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
8965 dwo_file
->name
= obstack_copy0 (&objfile
->objfile_obstack
,
8966 dwo_name
, strlen (dwo_name
));
8967 dwo_file
->dbfd
= dbfd
;
8969 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwo_file
);
8971 bfd_map_over_sections (dbfd
, dwarf2_locate_dwo_sections
, &dwo_file
->sections
);
8973 dwo_file
->cus
= create_dwo_debug_info_hash_table (dwo_file
);
8975 dwo_file
->tus
= create_debug_types_hash_table (dwo_file
,
8976 dwo_file
->sections
.types
);
8978 discard_cleanups (cleanups
);
8980 if (dwarf2_read_debug
)
8981 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
8986 /* This function is mapped across the sections and remembers the offset and
8987 size of each of the DWP debugging sections we are interested in. */
8990 dwarf2_locate_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
8992 struct dwp_file
*dwp_file
= dwp_file_ptr
;
8993 const struct dwop_section_names
*names
= &dwop_section_names
;
8994 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
8996 /* Record the ELF section number for later lookup: this is what the
8997 .debug_cu_index,.debug_tu_index tables use. */
8998 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
8999 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
9001 /* Look for specific sections that we need. */
9002 if (section_is_p (sectp
->name
, &names
->str_dwo
))
9004 dwp_file
->sections
.str
.asection
= sectp
;
9005 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
9007 else if (section_is_p (sectp
->name
, &names
->cu_index
))
9009 dwp_file
->sections
.cu_index
.asection
= sectp
;
9010 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
9012 else if (section_is_p (sectp
->name
, &names
->tu_index
))
9014 dwp_file
->sections
.tu_index
.asection
= sectp
;
9015 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
9019 /* Hash function for dwp_file loaded CUs/TUs. */
9022 hash_dwp_loaded_cutus (const void *item
)
9024 const struct dwo_unit
*dwo_unit
= item
;
9026 /* This drops the top 32 bits of the signature, but is ok for a hash. */
9027 return dwo_unit
->signature
;
9030 /* Equality function for dwp_file loaded CUs/TUs. */
9033 eq_dwp_loaded_cutus (const void *a
, const void *b
)
9035 const struct dwo_unit
*dua
= a
;
9036 const struct dwo_unit
*dub
= b
;
9038 return dua
->signature
== dub
->signature
;
9041 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
9044 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
9046 return htab_create_alloc_ex (3,
9047 hash_dwp_loaded_cutus
,
9048 eq_dwp_loaded_cutus
,
9050 &objfile
->objfile_obstack
,
9051 hashtab_obstack_allocate
,
9052 dummy_obstack_deallocate
);
9055 /* Initialize the use of the DWP file for the current objfile.
9056 By convention the name of the DWP file is ${objfile}.dwp.
9057 The result is NULL if it can't be found. */
9059 static struct dwp_file
*
9060 open_and_init_dwp_file (const char *comp_dir
)
9062 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9063 struct dwp_file
*dwp_file
;
9066 struct cleanup
*cleanups
;
9068 dwp_name
= xstrprintf ("%s.dwp", dwarf2_per_objfile
->objfile
->name
);
9069 cleanups
= make_cleanup (xfree
, dwp_name
);
9071 dbfd
= open_dwop_file (dwp_name
, comp_dir
, 1);
9074 if (dwarf2_read_debug
)
9075 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
);
9076 do_cleanups (cleanups
);
9079 dwp_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_file
);
9080 dwp_file
->name
= obstack_copy0 (&objfile
->objfile_obstack
,
9081 dwp_name
, strlen (dwp_name
));
9082 dwp_file
->dbfd
= dbfd
;
9083 do_cleanups (cleanups
);
9085 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwp_file
);
9087 /* +1: section 0 is unused */
9088 dwp_file
->num_sections
= bfd_count_sections (dbfd
) + 1;
9089 dwp_file
->elf_sections
=
9090 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
9091 dwp_file
->num_sections
, asection
*);
9093 bfd_map_over_sections (dbfd
, dwarf2_locate_dwp_sections
, dwp_file
);
9095 dwp_file
->cus
= create_dwp_hash_table (dwp_file
, 0);
9097 dwp_file
->tus
= create_dwp_hash_table (dwp_file
, 1);
9099 dwp_file
->loaded_cutus
= allocate_dwp_loaded_cutus_table (objfile
);
9101 discard_cleanups (cleanups
);
9103 if (dwarf2_read_debug
)
9105 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
9106 fprintf_unfiltered (gdb_stdlog
,
9107 " %u CUs, %u TUs\n",
9108 dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0,
9109 dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0);
9115 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
9116 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
9117 or in the DWP file for the objfile, referenced by THIS_UNIT.
9118 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
9119 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
9121 This is called, for example, when wanting to read a variable with a
9122 complex location. Therefore we don't want to do file i/o for every call.
9123 Therefore we don't want to look for a DWO file on every call.
9124 Therefore we first see if we've already seen SIGNATURE in a DWP file,
9125 then we check if we've already seen DWO_NAME, and only THEN do we check
9128 The result is a pointer to the dwo_unit object or NULL if we didn't find it
9129 (dwo_id mismatch or couldn't find the DWO/DWP file). */
9131 static struct dwo_unit
*
9132 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
9133 const char *dwo_name
, const char *comp_dir
,
9134 ULONGEST signature
, int is_debug_types
)
9136 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9137 const char *kind
= is_debug_types
? "TU" : "CU";
9138 void **dwo_file_slot
;
9139 struct dwo_file
*dwo_file
;
9140 struct dwp_file
*dwp_file
;
9142 /* Have we already read SIGNATURE from a DWP file? */
9144 if (! dwarf2_per_objfile
->dwp_checked
)
9146 dwarf2_per_objfile
->dwp_file
= open_and_init_dwp_file (comp_dir
);
9147 dwarf2_per_objfile
->dwp_checked
= 1;
9149 dwp_file
= dwarf2_per_objfile
->dwp_file
;
9151 if (dwp_file
!= NULL
)
9153 const struct dwp_hash_table
*dwp_htab
=
9154 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
9156 if (dwp_htab
!= NULL
)
9158 struct dwo_unit
*dwo_cutu
=
9159 lookup_dwo_in_dwp (dwp_file
, dwp_htab
, signature
, is_debug_types
);
9161 if (dwo_cutu
!= NULL
)
9163 if (dwarf2_read_debug
)
9165 fprintf_unfiltered (gdb_stdlog
,
9166 "Virtual DWO %s %s found: @%s\n",
9167 kind
, hex_string (signature
),
9168 host_address_to_string (dwo_cutu
));
9175 /* Have we already seen DWO_NAME? */
9177 dwo_file_slot
= lookup_dwo_file_slot (dwo_name
);
9178 if (*dwo_file_slot
== NULL
)
9180 /* Read in the file and build a table of the DWOs it contains. */
9181 *dwo_file_slot
= open_and_init_dwo_file (dwo_name
, comp_dir
);
9183 /* NOTE: This will be NULL if unable to open the file. */
9184 dwo_file
= *dwo_file_slot
;
9186 if (dwo_file
!= NULL
)
9188 htab_t htab
= is_debug_types
? dwo_file
->tus
: dwo_file
->cus
;
9192 struct dwo_unit find_dwo_cutu
, *dwo_cutu
;
9194 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
9195 find_dwo_cutu
.signature
= signature
;
9196 dwo_cutu
= htab_find (htab
, &find_dwo_cutu
);
9198 if (dwo_cutu
!= NULL
)
9200 if (dwarf2_read_debug
)
9202 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
9203 kind
, dwo_name
, hex_string (signature
),
9204 host_address_to_string (dwo_cutu
));
9211 /* We didn't find it. This could mean a dwo_id mismatch, or
9212 someone deleted the DWO/DWP file, or the search path isn't set up
9213 correctly to find the file. */
9215 if (dwarf2_read_debug
)
9217 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
9218 kind
, dwo_name
, hex_string (signature
));
9221 complaint (&symfile_complaints
,
9222 _("Could not find DWO CU referenced by CU at offset 0x%x"
9224 this_unit
->offset
.sect_off
, objfile
->name
);
9228 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
9229 See lookup_dwo_cutu_unit for details. */
9231 static struct dwo_unit
*
9232 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
9233 const char *dwo_name
, const char *comp_dir
,
9236 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
9239 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
9240 See lookup_dwo_cutu_unit for details. */
9242 static struct dwo_unit
*
9243 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
9244 const char *dwo_name
, const char *comp_dir
)
9246 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
9249 /* Free all resources associated with DWO_FILE.
9250 Close the DWO file and munmap the sections.
9251 All memory should be on the objfile obstack. */
9254 free_dwo_file (struct dwo_file
*dwo_file
, struct objfile
*objfile
)
9257 struct dwarf2_section_info
*section
;
9259 gdb_bfd_unref (dwo_file
->dbfd
);
9261 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
9264 /* Wrapper for free_dwo_file for use in cleanups. */
9267 free_dwo_file_cleanup (void *arg
)
9269 struct dwo_file
*dwo_file
= (struct dwo_file
*) arg
;
9270 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9272 free_dwo_file (dwo_file
, objfile
);
9275 /* Traversal function for free_dwo_files. */
9278 free_dwo_file_from_slot (void **slot
, void *info
)
9280 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
9281 struct objfile
*objfile
= (struct objfile
*) info
;
9283 free_dwo_file (dwo_file
, objfile
);
9288 /* Free all resources associated with DWO_FILES. */
9291 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
9293 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
9296 /* Read in various DIEs. */
9298 /* qsort helper for inherit_abstract_dies. */
9301 unsigned_int_compar (const void *ap
, const void *bp
)
9303 unsigned int a
= *(unsigned int *) ap
;
9304 unsigned int b
= *(unsigned int *) bp
;
9306 return (a
> b
) - (b
> a
);
9309 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
9310 Inherit only the children of the DW_AT_abstract_origin DIE not being
9311 already referenced by DW_AT_abstract_origin from the children of the
9315 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
9317 struct die_info
*child_die
;
9318 unsigned die_children_count
;
9319 /* CU offsets which were referenced by children of the current DIE. */
9320 sect_offset
*offsets
;
9321 sect_offset
*offsets_end
, *offsetp
;
9322 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
9323 struct die_info
*origin_die
;
9324 /* Iterator of the ORIGIN_DIE children. */
9325 struct die_info
*origin_child_die
;
9326 struct cleanup
*cleanups
;
9327 struct attribute
*attr
;
9328 struct dwarf2_cu
*origin_cu
;
9329 struct pending
**origin_previous_list_in_scope
;
9331 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
9335 /* Note that following die references may follow to a die in a
9339 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
9341 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
9343 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
9344 origin_cu
->list_in_scope
= cu
->list_in_scope
;
9346 if (die
->tag
!= origin_die
->tag
9347 && !(die
->tag
== DW_TAG_inlined_subroutine
9348 && origin_die
->tag
== DW_TAG_subprogram
))
9349 complaint (&symfile_complaints
,
9350 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
9351 die
->offset
.sect_off
, origin_die
->offset
.sect_off
);
9353 child_die
= die
->child
;
9354 die_children_count
= 0;
9355 while (child_die
&& child_die
->tag
)
9357 child_die
= sibling_die (child_die
);
9358 die_children_count
++;
9360 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
9361 cleanups
= make_cleanup (xfree
, offsets
);
9363 offsets_end
= offsets
;
9364 child_die
= die
->child
;
9365 while (child_die
&& child_die
->tag
)
9367 /* For each CHILD_DIE, find the corresponding child of
9368 ORIGIN_DIE. If there is more than one layer of
9369 DW_AT_abstract_origin, follow them all; there shouldn't be,
9370 but GCC versions at least through 4.4 generate this (GCC PR
9372 struct die_info
*child_origin_die
= child_die
;
9373 struct dwarf2_cu
*child_origin_cu
= cu
;
9377 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
9381 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
9385 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
9386 counterpart may exist. */
9387 if (child_origin_die
!= child_die
)
9389 if (child_die
->tag
!= child_origin_die
->tag
9390 && !(child_die
->tag
== DW_TAG_inlined_subroutine
9391 && child_origin_die
->tag
== DW_TAG_subprogram
))
9392 complaint (&symfile_complaints
,
9393 _("Child DIE 0x%x and its abstract origin 0x%x have "
9394 "different tags"), child_die
->offset
.sect_off
,
9395 child_origin_die
->offset
.sect_off
);
9396 if (child_origin_die
->parent
!= origin_die
)
9397 complaint (&symfile_complaints
,
9398 _("Child DIE 0x%x and its abstract origin 0x%x have "
9399 "different parents"), child_die
->offset
.sect_off
,
9400 child_origin_die
->offset
.sect_off
);
9402 *offsets_end
++ = child_origin_die
->offset
;
9404 child_die
= sibling_die (child_die
);
9406 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
9407 unsigned_int_compar
);
9408 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
9409 if (offsetp
[-1].sect_off
== offsetp
->sect_off
)
9410 complaint (&symfile_complaints
,
9411 _("Multiple children of DIE 0x%x refer "
9412 "to DIE 0x%x as their abstract origin"),
9413 die
->offset
.sect_off
, offsetp
->sect_off
);
9416 origin_child_die
= origin_die
->child
;
9417 while (origin_child_die
&& origin_child_die
->tag
)
9419 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
9420 while (offsetp
< offsets_end
9421 && offsetp
->sect_off
< origin_child_die
->offset
.sect_off
)
9423 if (offsetp
>= offsets_end
9424 || offsetp
->sect_off
> origin_child_die
->offset
.sect_off
)
9426 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
9427 process_die (origin_child_die
, origin_cu
);
9429 origin_child_die
= sibling_die (origin_child_die
);
9431 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
9433 do_cleanups (cleanups
);
9437 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9439 struct objfile
*objfile
= cu
->objfile
;
9440 struct context_stack
*new;
9443 struct die_info
*child_die
;
9444 struct attribute
*attr
, *call_line
, *call_file
;
9447 struct block
*block
;
9448 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
9449 VEC (symbolp
) *template_args
= NULL
;
9450 struct template_symbol
*templ_func
= NULL
;
9454 /* If we do not have call site information, we can't show the
9455 caller of this inlined function. That's too confusing, so
9456 only use the scope for local variables. */
9457 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
9458 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
9459 if (call_line
== NULL
|| call_file
== NULL
)
9461 read_lexical_block_scope (die
, cu
);
9466 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9468 name
= dwarf2_name (die
, cu
);
9470 /* Ignore functions with missing or empty names. These are actually
9471 illegal according to the DWARF standard. */
9474 complaint (&symfile_complaints
,
9475 _("missing name for subprogram DIE at %d"),
9476 die
->offset
.sect_off
);
9480 /* Ignore functions with missing or invalid low and high pc attributes. */
9481 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
9483 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
9484 if (!attr
|| !DW_UNSND (attr
))
9485 complaint (&symfile_complaints
,
9486 _("cannot get low and high bounds "
9487 "for subprogram DIE at %d"),
9488 die
->offset
.sect_off
);
9495 /* If we have any template arguments, then we must allocate a
9496 different sort of symbol. */
9497 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
9499 if (child_die
->tag
== DW_TAG_template_type_param
9500 || child_die
->tag
== DW_TAG_template_value_param
)
9502 templ_func
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
9503 struct template_symbol
);
9504 templ_func
->base
.is_cplus_template_function
= 1;
9509 new = push_context (0, lowpc
);
9510 new->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
9511 (struct symbol
*) templ_func
);
9513 /* If there is a location expression for DW_AT_frame_base, record
9515 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
9517 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
9518 expression is being recorded directly in the function's symbol
9519 and not in a separate frame-base object. I guess this hack is
9520 to avoid adding some sort of frame-base adjunct/annex to the
9521 function's symbol :-(. The problem with doing this is that it
9522 results in a function symbol with a location expression that
9523 has nothing to do with the location of the function, ouch! The
9524 relationship should be: a function's symbol has-a frame base; a
9525 frame-base has-a location expression. */
9526 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
9528 cu
->list_in_scope
= &local_symbols
;
9530 if (die
->child
!= NULL
)
9532 child_die
= die
->child
;
9533 while (child_die
&& child_die
->tag
)
9535 if (child_die
->tag
== DW_TAG_template_type_param
9536 || child_die
->tag
== DW_TAG_template_value_param
)
9538 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
9541 VEC_safe_push (symbolp
, template_args
, arg
);
9544 process_die (child_die
, cu
);
9545 child_die
= sibling_die (child_die
);
9549 inherit_abstract_dies (die
, cu
);
9551 /* If we have a DW_AT_specification, we might need to import using
9552 directives from the context of the specification DIE. See the
9553 comment in determine_prefix. */
9554 if (cu
->language
== language_cplus
9555 && dwarf2_attr (die
, DW_AT_specification
, cu
))
9557 struct dwarf2_cu
*spec_cu
= cu
;
9558 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
9562 child_die
= spec_die
->child
;
9563 while (child_die
&& child_die
->tag
)
9565 if (child_die
->tag
== DW_TAG_imported_module
)
9566 process_die (child_die
, spec_cu
);
9567 child_die
= sibling_die (child_die
);
9570 /* In some cases, GCC generates specification DIEs that
9571 themselves contain DW_AT_specification attributes. */
9572 spec_die
= die_specification (spec_die
, &spec_cu
);
9576 new = pop_context ();
9577 /* Make a block for the local symbols within. */
9578 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
9579 lowpc
, highpc
, objfile
);
9581 /* For C++, set the block's scope. */
9582 if ((cu
->language
== language_cplus
|| cu
->language
== language_fortran
)
9583 && cu
->processing_has_namespace_info
)
9584 block_set_scope (block
, determine_prefix (die
, cu
),
9585 &objfile
->objfile_obstack
);
9587 /* If we have address ranges, record them. */
9588 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
9590 /* Attach template arguments to function. */
9591 if (! VEC_empty (symbolp
, template_args
))
9593 gdb_assert (templ_func
!= NULL
);
9595 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
9596 templ_func
->template_arguments
9597 = obstack_alloc (&objfile
->objfile_obstack
,
9598 (templ_func
->n_template_arguments
9599 * sizeof (struct symbol
*)));
9600 memcpy (templ_func
->template_arguments
,
9601 VEC_address (symbolp
, template_args
),
9602 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
9603 VEC_free (symbolp
, template_args
);
9606 /* In C++, we can have functions nested inside functions (e.g., when
9607 a function declares a class that has methods). This means that
9608 when we finish processing a function scope, we may need to go
9609 back to building a containing block's symbol lists. */
9610 local_symbols
= new->locals
;
9611 using_directives
= new->using_directives
;
9613 /* If we've finished processing a top-level function, subsequent
9614 symbols go in the file symbol list. */
9615 if (outermost_context_p ())
9616 cu
->list_in_scope
= &file_symbols
;
9619 /* Process all the DIES contained within a lexical block scope. Start
9620 a new scope, process the dies, and then close the scope. */
9623 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9625 struct objfile
*objfile
= cu
->objfile
;
9626 struct context_stack
*new;
9627 CORE_ADDR lowpc
, highpc
;
9628 struct die_info
*child_die
;
9631 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9633 /* Ignore blocks with missing or invalid low and high pc attributes. */
9634 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
9635 as multiple lexical blocks? Handling children in a sane way would
9636 be nasty. Might be easier to properly extend generic blocks to
9638 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
9643 push_context (0, lowpc
);
9644 if (die
->child
!= NULL
)
9646 child_die
= die
->child
;
9647 while (child_die
&& child_die
->tag
)
9649 process_die (child_die
, cu
);
9650 child_die
= sibling_die (child_die
);
9653 new = pop_context ();
9655 if (local_symbols
!= NULL
|| using_directives
!= NULL
)
9658 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
9661 /* Note that recording ranges after traversing children, as we
9662 do here, means that recording a parent's ranges entails
9663 walking across all its children's ranges as they appear in
9664 the address map, which is quadratic behavior.
9666 It would be nicer to record the parent's ranges before
9667 traversing its children, simply overriding whatever you find
9668 there. But since we don't even decide whether to create a
9669 block until after we've traversed its children, that's hard
9671 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
9673 local_symbols
= new->locals
;
9674 using_directives
= new->using_directives
;
9677 /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */
9680 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9682 struct objfile
*objfile
= cu
->objfile
;
9683 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9684 CORE_ADDR pc
, baseaddr
;
9685 struct attribute
*attr
;
9686 struct call_site
*call_site
, call_site_local
;
9689 struct die_info
*child_die
;
9691 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9693 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
9696 complaint (&symfile_complaints
,
9697 _("missing DW_AT_low_pc for DW_TAG_GNU_call_site "
9698 "DIE 0x%x [in module %s]"),
9699 die
->offset
.sect_off
, objfile
->name
);
9702 pc
= DW_ADDR (attr
) + baseaddr
;
9704 if (cu
->call_site_htab
== NULL
)
9705 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
9706 NULL
, &objfile
->objfile_obstack
,
9707 hashtab_obstack_allocate
, NULL
);
9708 call_site_local
.pc
= pc
;
9709 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
9712 complaint (&symfile_complaints
,
9713 _("Duplicate PC %s for DW_TAG_GNU_call_site "
9714 "DIE 0x%x [in module %s]"),
9715 paddress (gdbarch
, pc
), die
->offset
.sect_off
, objfile
->name
);
9719 /* Count parameters at the caller. */
9722 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
9723 child_die
= sibling_die (child_die
))
9725 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
9727 complaint (&symfile_complaints
,
9728 _("Tag %d is not DW_TAG_GNU_call_site_parameter in "
9729 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
9730 child_die
->tag
, child_die
->offset
.sect_off
, objfile
->name
);
9737 call_site
= obstack_alloc (&objfile
->objfile_obstack
,
9738 (sizeof (*call_site
)
9739 + (sizeof (*call_site
->parameter
)
9742 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
9745 if (dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
9747 struct die_info
*func_die
;
9749 /* Skip also over DW_TAG_inlined_subroutine. */
9750 for (func_die
= die
->parent
;
9751 func_die
&& func_die
->tag
!= DW_TAG_subprogram
9752 && func_die
->tag
!= DW_TAG_subroutine_type
;
9753 func_die
= func_die
->parent
);
9755 /* DW_AT_GNU_all_call_sites is a superset
9756 of DW_AT_GNU_all_tail_call_sites. */
9758 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
9759 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
9761 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
9762 not complete. But keep CALL_SITE for look ups via call_site_htab,
9763 both the initial caller containing the real return address PC and
9764 the final callee containing the current PC of a chain of tail
9765 calls do not need to have the tail call list complete. But any
9766 function candidate for a virtual tail call frame searched via
9767 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
9768 determined unambiguously. */
9772 struct type
*func_type
= NULL
;
9775 func_type
= get_die_type (func_die
, cu
);
9776 if (func_type
!= NULL
)
9778 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
9780 /* Enlist this call site to the function. */
9781 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
9782 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
9785 complaint (&symfile_complaints
,
9786 _("Cannot find function owning DW_TAG_GNU_call_site "
9787 "DIE 0x%x [in module %s]"),
9788 die
->offset
.sect_off
, objfile
->name
);
9792 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
9794 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
9795 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
9796 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
9797 /* Keep NULL DWARF_BLOCK. */;
9798 else if (attr_form_is_block (attr
))
9800 struct dwarf2_locexpr_baton
*dlbaton
;
9802 dlbaton
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*dlbaton
));
9803 dlbaton
->data
= DW_BLOCK (attr
)->data
;
9804 dlbaton
->size
= DW_BLOCK (attr
)->size
;
9805 dlbaton
->per_cu
= cu
->per_cu
;
9807 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
9809 else if (is_ref_attr (attr
))
9811 struct dwarf2_cu
*target_cu
= cu
;
9812 struct die_info
*target_die
;
9814 target_die
= follow_die_ref_or_sig (die
, attr
, &target_cu
);
9815 gdb_assert (target_cu
->objfile
== objfile
);
9816 if (die_is_declaration (target_die
, target_cu
))
9818 const char *target_physname
= NULL
;
9819 struct attribute
*target_attr
;
9821 /* Prefer the mangled name; otherwise compute the demangled one. */
9822 target_attr
= dwarf2_attr (target_die
, DW_AT_linkage_name
, target_cu
);
9823 if (target_attr
== NULL
)
9824 target_attr
= dwarf2_attr (target_die
, DW_AT_MIPS_linkage_name
,
9826 if (target_attr
!= NULL
&& DW_STRING (target_attr
) != NULL
)
9827 target_physname
= DW_STRING (target_attr
);
9829 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
9830 if (target_physname
== NULL
)
9831 complaint (&symfile_complaints
,
9832 _("DW_AT_GNU_call_site_target target DIE has invalid "
9833 "physname, for referencing DIE 0x%x [in module %s]"),
9834 die
->offset
.sect_off
, objfile
->name
);
9836 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
9842 /* DW_AT_entry_pc should be preferred. */
9843 if (!dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
))
9844 complaint (&symfile_complaints
,
9845 _("DW_AT_GNU_call_site_target target DIE has invalid "
9846 "low pc, for referencing DIE 0x%x [in module %s]"),
9847 die
->offset
.sect_off
, objfile
->name
);
9849 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
+ baseaddr
);
9853 complaint (&symfile_complaints
,
9854 _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither "
9855 "block nor reference, for DIE 0x%x [in module %s]"),
9856 die
->offset
.sect_off
, objfile
->name
);
9858 call_site
->per_cu
= cu
->per_cu
;
9860 for (child_die
= die
->child
;
9861 child_die
&& child_die
->tag
;
9862 child_die
= sibling_die (child_die
))
9864 struct call_site_parameter
*parameter
;
9865 struct attribute
*loc
, *origin
;
9867 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
9869 /* Already printed the complaint above. */
9873 gdb_assert (call_site
->parameter_count
< nparams
);
9874 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
9876 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
9877 specifies DW_TAG_formal_parameter. Value of the data assumed for the
9878 register is contained in DW_AT_GNU_call_site_value. */
9880 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
9881 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
9882 if (loc
== NULL
&& origin
!= NULL
&& is_ref_attr (origin
))
9886 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
9887 offset
= dwarf2_get_ref_die_offset (origin
);
9888 if (!offset_in_cu_p (&cu
->header
, offset
))
9890 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
9891 binding can be done only inside one CU. Such referenced DIE
9892 therefore cannot be even moved to DW_TAG_partial_unit. */
9893 complaint (&symfile_complaints
,
9894 _("DW_AT_abstract_origin offset is not in CU for "
9895 "DW_TAG_GNU_call_site child DIE 0x%x "
9897 child_die
->offset
.sect_off
, objfile
->name
);
9900 parameter
->u
.param_offset
.cu_off
= (offset
.sect_off
9901 - cu
->header
.offset
.sect_off
);
9903 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
9905 complaint (&symfile_complaints
,
9906 _("No DW_FORM_block* DW_AT_location for "
9907 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
9908 child_die
->offset
.sect_off
, objfile
->name
);
9913 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
9914 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
9915 if (parameter
->u
.dwarf_reg
!= -1)
9916 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
9917 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
9918 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
9919 ¶meter
->u
.fb_offset
))
9920 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
9923 complaint (&symfile_complaints
,
9924 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
9925 "for DW_FORM_block* DW_AT_location is supported for "
9926 "DW_TAG_GNU_call_site child DIE 0x%x "
9928 child_die
->offset
.sect_off
, objfile
->name
);
9933 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
9934 if (!attr_form_is_block (attr
))
9936 complaint (&symfile_complaints
,
9937 _("No DW_FORM_block* DW_AT_GNU_call_site_value for "
9938 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
9939 child_die
->offset
.sect_off
, objfile
->name
);
9942 parameter
->value
= DW_BLOCK (attr
)->data
;
9943 parameter
->value_size
= DW_BLOCK (attr
)->size
;
9945 /* Parameters are not pre-cleared by memset above. */
9946 parameter
->data_value
= NULL
;
9947 parameter
->data_value_size
= 0;
9948 call_site
->parameter_count
++;
9950 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
9953 if (!attr_form_is_block (attr
))
9954 complaint (&symfile_complaints
,
9955 _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for "
9956 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
9957 child_die
->offset
.sect_off
, objfile
->name
);
9960 parameter
->data_value
= DW_BLOCK (attr
)->data
;
9961 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
9967 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
9968 Return 1 if the attributes are present and valid, otherwise, return 0.
9969 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
9972 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
9973 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
9974 struct partial_symtab
*ranges_pst
)
9976 struct objfile
*objfile
= cu
->objfile
;
9977 struct comp_unit_head
*cu_header
= &cu
->header
;
9978 bfd
*obfd
= objfile
->obfd
;
9979 unsigned int addr_size
= cu_header
->addr_size
;
9980 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
9981 /* Base address selection entry. */
9992 found_base
= cu
->base_known
;
9993 base
= cu
->base_address
;
9995 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
9996 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
9998 complaint (&symfile_complaints
,
9999 _("Offset %d out of bounds for DW_AT_ranges attribute"),
10003 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
10005 /* Read in the largest possible address. */
10006 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
10007 if ((marker
& mask
) == mask
)
10009 /* If we found the largest possible address, then
10010 read the base address. */
10011 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
10012 buffer
+= 2 * addr_size
;
10013 offset
+= 2 * addr_size
;
10019 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
10023 CORE_ADDR range_beginning
, range_end
;
10025 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
10026 buffer
+= addr_size
;
10027 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
10028 buffer
+= addr_size
;
10029 offset
+= 2 * addr_size
;
10031 /* An end of list marker is a pair of zero addresses. */
10032 if (range_beginning
== 0 && range_end
== 0)
10033 /* Found the end of list entry. */
10036 /* Each base address selection entry is a pair of 2 values.
10037 The first is the largest possible address, the second is
10038 the base address. Check for a base address here. */
10039 if ((range_beginning
& mask
) == mask
)
10041 /* If we found the largest possible address, then
10042 read the base address. */
10043 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
10050 /* We have no valid base address for the ranges
10052 complaint (&symfile_complaints
,
10053 _("Invalid .debug_ranges data (no base address)"));
10057 if (range_beginning
> range_end
)
10059 /* Inverted range entries are invalid. */
10060 complaint (&symfile_complaints
,
10061 _("Invalid .debug_ranges data (inverted range)"));
10065 /* Empty range entries have no effect. */
10066 if (range_beginning
== range_end
)
10069 range_beginning
+= base
;
10072 /* A not-uncommon case of bad debug info.
10073 Don't pollute the addrmap with bad data. */
10074 if (range_beginning
+ baseaddr
== 0
10075 && !dwarf2_per_objfile
->has_section_at_zero
)
10077 complaint (&symfile_complaints
,
10078 _(".debug_ranges entry has start address of zero"
10079 " [in module %s]"), objfile
->name
);
10083 if (ranges_pst
!= NULL
)
10084 addrmap_set_empty (objfile
->psymtabs_addrmap
,
10085 range_beginning
+ baseaddr
,
10086 range_end
- 1 + baseaddr
,
10089 /* FIXME: This is recording everything as a low-high
10090 segment of consecutive addresses. We should have a
10091 data structure for discontiguous block ranges
10095 low
= range_beginning
;
10101 if (range_beginning
< low
)
10102 low
= range_beginning
;
10103 if (range_end
> high
)
10109 /* If the first entry is an end-of-list marker, the range
10110 describes an empty scope, i.e. no instructions. */
10116 *high_return
= high
;
10120 /* Get low and high pc attributes from a die. Return 1 if the attributes
10121 are present and valid, otherwise, return 0. Return -1 if the range is
10122 discontinuous, i.e. derived from DW_AT_ranges information. */
10125 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
10126 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
10127 struct partial_symtab
*pst
)
10129 struct attribute
*attr
;
10130 struct attribute
*attr_high
;
10132 CORE_ADDR high
= 0;
10135 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
10138 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
10141 low
= DW_ADDR (attr
);
10142 if (attr_high
->form
== DW_FORM_addr
10143 || attr_high
->form
== DW_FORM_GNU_addr_index
)
10144 high
= DW_ADDR (attr_high
);
10146 high
= low
+ DW_UNSND (attr_high
);
10149 /* Found high w/o low attribute. */
10152 /* Found consecutive range of addresses. */
10157 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
10160 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
10161 We take advantage of the fact that DW_AT_ranges does not appear
10162 in DW_TAG_compile_unit of DWO files. */
10163 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
10164 unsigned int ranges_offset
= (DW_UNSND (attr
)
10165 + (need_ranges_base
10169 /* Value of the DW_AT_ranges attribute is the offset in the
10170 .debug_ranges section. */
10171 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
10173 /* Found discontinuous range of addresses. */
10178 /* read_partial_die has also the strict LOW < HIGH requirement. */
10182 /* When using the GNU linker, .gnu.linkonce. sections are used to
10183 eliminate duplicate copies of functions and vtables and such.
10184 The linker will arbitrarily choose one and discard the others.
10185 The AT_*_pc values for such functions refer to local labels in
10186 these sections. If the section from that file was discarded, the
10187 labels are not in the output, so the relocs get a value of 0.
10188 If this is a discarded function, mark the pc bounds as invalid,
10189 so that GDB will ignore it. */
10190 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
10199 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
10200 its low and high PC addresses. Do nothing if these addresses could not
10201 be determined. Otherwise, set LOWPC to the low address if it is smaller,
10202 and HIGHPC to the high address if greater than HIGHPC. */
10205 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
10206 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
10207 struct dwarf2_cu
*cu
)
10209 CORE_ADDR low
, high
;
10210 struct die_info
*child
= die
->child
;
10212 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
10214 *lowpc
= min (*lowpc
, low
);
10215 *highpc
= max (*highpc
, high
);
10218 /* If the language does not allow nested subprograms (either inside
10219 subprograms or lexical blocks), we're done. */
10220 if (cu
->language
!= language_ada
)
10223 /* Check all the children of the given DIE. If it contains nested
10224 subprograms, then check their pc bounds. Likewise, we need to
10225 check lexical blocks as well, as they may also contain subprogram
10227 while (child
&& child
->tag
)
10229 if (child
->tag
== DW_TAG_subprogram
10230 || child
->tag
== DW_TAG_lexical_block
)
10231 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
10232 child
= sibling_die (child
);
10236 /* Get the low and high pc's represented by the scope DIE, and store
10237 them in *LOWPC and *HIGHPC. If the correct values can't be
10238 determined, set *LOWPC to -1 and *HIGHPC to 0. */
10241 get_scope_pc_bounds (struct die_info
*die
,
10242 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
10243 struct dwarf2_cu
*cu
)
10245 CORE_ADDR best_low
= (CORE_ADDR
) -1;
10246 CORE_ADDR best_high
= (CORE_ADDR
) 0;
10247 CORE_ADDR current_low
, current_high
;
10249 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
10251 best_low
= current_low
;
10252 best_high
= current_high
;
10256 struct die_info
*child
= die
->child
;
10258 while (child
&& child
->tag
)
10260 switch (child
->tag
) {
10261 case DW_TAG_subprogram
:
10262 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
10264 case DW_TAG_namespace
:
10265 case DW_TAG_module
:
10266 /* FIXME: carlton/2004-01-16: Should we do this for
10267 DW_TAG_class_type/DW_TAG_structure_type, too? I think
10268 that current GCC's always emit the DIEs corresponding
10269 to definitions of methods of classes as children of a
10270 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
10271 the DIEs giving the declarations, which could be
10272 anywhere). But I don't see any reason why the
10273 standards says that they have to be there. */
10274 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
10276 if (current_low
!= ((CORE_ADDR
) -1))
10278 best_low
= min (best_low
, current_low
);
10279 best_high
= max (best_high
, current_high
);
10287 child
= sibling_die (child
);
10292 *highpc
= best_high
;
10295 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
10299 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
10300 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
10302 struct objfile
*objfile
= cu
->objfile
;
10303 struct attribute
*attr
;
10304 struct attribute
*attr_high
;
10306 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
10309 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
10312 CORE_ADDR low
= DW_ADDR (attr
);
10314 if (attr_high
->form
== DW_FORM_addr
10315 || attr_high
->form
== DW_FORM_GNU_addr_index
)
10316 high
= DW_ADDR (attr_high
);
10318 high
= low
+ DW_UNSND (attr_high
);
10320 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
10324 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
10327 bfd
*obfd
= objfile
->obfd
;
10328 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
10329 We take advantage of the fact that DW_AT_ranges does not appear
10330 in DW_TAG_compile_unit of DWO files. */
10331 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
10333 /* The value of the DW_AT_ranges attribute is the offset of the
10334 address range list in the .debug_ranges section. */
10335 unsigned long offset
= (DW_UNSND (attr
)
10336 + (need_ranges_base
? cu
->ranges_base
: 0));
10337 gdb_byte
*buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
10339 /* For some target architectures, but not others, the
10340 read_address function sign-extends the addresses it returns.
10341 To recognize base address selection entries, we need a
10343 unsigned int addr_size
= cu
->header
.addr_size
;
10344 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
10346 /* The base address, to which the next pair is relative. Note
10347 that this 'base' is a DWARF concept: most entries in a range
10348 list are relative, to reduce the number of relocs against the
10349 debugging information. This is separate from this function's
10350 'baseaddr' argument, which GDB uses to relocate debugging
10351 information from a shared library based on the address at
10352 which the library was loaded. */
10353 CORE_ADDR base
= cu
->base_address
;
10354 int base_known
= cu
->base_known
;
10356 gdb_assert (dwarf2_per_objfile
->ranges
.readin
);
10357 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
10359 complaint (&symfile_complaints
,
10360 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
10367 unsigned int bytes_read
;
10368 CORE_ADDR start
, end
;
10370 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
10371 buffer
+= bytes_read
;
10372 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
10373 buffer
+= bytes_read
;
10375 /* Did we find the end of the range list? */
10376 if (start
== 0 && end
== 0)
10379 /* Did we find a base address selection entry? */
10380 else if ((start
& base_select_mask
) == base_select_mask
)
10386 /* We found an ordinary address range. */
10391 complaint (&symfile_complaints
,
10392 _("Invalid .debug_ranges data "
10393 "(no base address)"));
10399 /* Inverted range entries are invalid. */
10400 complaint (&symfile_complaints
,
10401 _("Invalid .debug_ranges data "
10402 "(inverted range)"));
10406 /* Empty range entries have no effect. */
10410 start
+= base
+ baseaddr
;
10411 end
+= base
+ baseaddr
;
10413 /* A not-uncommon case of bad debug info.
10414 Don't pollute the addrmap with bad data. */
10415 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
10417 complaint (&symfile_complaints
,
10418 _(".debug_ranges entry has start address of zero"
10419 " [in module %s]"), objfile
->name
);
10423 record_block_range (block
, start
, end
- 1);
10429 /* Check whether the producer field indicates either of GCC < 4.6, or the
10430 Intel C/C++ compiler, and cache the result in CU. */
10433 check_producer (struct dwarf2_cu
*cu
)
10436 int major
, minor
, release
;
10438 if (cu
->producer
== NULL
)
10440 /* For unknown compilers expect their behavior is DWARF version
10443 GCC started to support .debug_types sections by -gdwarf-4 since
10444 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
10445 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
10446 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
10447 interpreted incorrectly by GDB now - GCC PR debug/48229. */
10449 else if (strncmp (cu
->producer
, "GNU ", strlen ("GNU ")) == 0)
10451 /* Skip any identifier after "GNU " - such as "C++" or "Java". */
10453 cs
= &cu
->producer
[strlen ("GNU ")];
10454 while (*cs
&& !isdigit (*cs
))
10456 if (sscanf (cs
, "%d.%d.%d", &major
, &minor
, &release
) != 3)
10458 /* Not recognized as GCC. */
10462 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
10463 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
10466 else if (strncmp (cu
->producer
, "Intel(R) C", strlen ("Intel(R) C")) == 0)
10467 cu
->producer_is_icc
= 1;
10470 /* For other non-GCC compilers, expect their behavior is DWARF version
10474 cu
->checked_producer
= 1;
10477 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
10478 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
10479 during 4.6.0 experimental. */
10482 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
10484 if (!cu
->checked_producer
)
10485 check_producer (cu
);
10487 return cu
->producer_is_gxx_lt_4_6
;
10490 /* Return the default accessibility type if it is not overriden by
10491 DW_AT_accessibility. */
10493 static enum dwarf_access_attribute
10494 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
10496 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
10498 /* The default DWARF 2 accessibility for members is public, the default
10499 accessibility for inheritance is private. */
10501 if (die
->tag
!= DW_TAG_inheritance
)
10502 return DW_ACCESS_public
;
10504 return DW_ACCESS_private
;
10508 /* DWARF 3+ defines the default accessibility a different way. The same
10509 rules apply now for DW_TAG_inheritance as for the members and it only
10510 depends on the container kind. */
10512 if (die
->parent
->tag
== DW_TAG_class_type
)
10513 return DW_ACCESS_private
;
10515 return DW_ACCESS_public
;
10519 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
10520 offset. If the attribute was not found return 0, otherwise return
10521 1. If it was found but could not properly be handled, set *OFFSET
10525 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
10528 struct attribute
*attr
;
10530 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
10535 /* Note that we do not check for a section offset first here.
10536 This is because DW_AT_data_member_location is new in DWARF 4,
10537 so if we see it, we can assume that a constant form is really
10538 a constant and not a section offset. */
10539 if (attr_form_is_constant (attr
))
10540 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
10541 else if (attr_form_is_section_offset (attr
))
10542 dwarf2_complex_location_expr_complaint ();
10543 else if (attr_form_is_block (attr
))
10544 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
10546 dwarf2_complex_location_expr_complaint ();
10554 /* Add an aggregate field to the field list. */
10557 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
10558 struct dwarf2_cu
*cu
)
10560 struct objfile
*objfile
= cu
->objfile
;
10561 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
10562 struct nextfield
*new_field
;
10563 struct attribute
*attr
;
10565 const char *fieldname
= "";
10567 /* Allocate a new field list entry and link it in. */
10568 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
10569 make_cleanup (xfree
, new_field
);
10570 memset (new_field
, 0, sizeof (struct nextfield
));
10572 if (die
->tag
== DW_TAG_inheritance
)
10574 new_field
->next
= fip
->baseclasses
;
10575 fip
->baseclasses
= new_field
;
10579 new_field
->next
= fip
->fields
;
10580 fip
->fields
= new_field
;
10584 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
10586 new_field
->accessibility
= DW_UNSND (attr
);
10588 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
10589 if (new_field
->accessibility
!= DW_ACCESS_public
)
10590 fip
->non_public_fields
= 1;
10592 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
10594 new_field
->virtuality
= DW_UNSND (attr
);
10596 new_field
->virtuality
= DW_VIRTUALITY_none
;
10598 fp
= &new_field
->field
;
10600 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
10604 /* Data member other than a C++ static data member. */
10606 /* Get type of field. */
10607 fp
->type
= die_type (die
, cu
);
10609 SET_FIELD_BITPOS (*fp
, 0);
10611 /* Get bit size of field (zero if none). */
10612 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
10615 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
10619 FIELD_BITSIZE (*fp
) = 0;
10622 /* Get bit offset of field. */
10623 if (handle_data_member_location (die
, cu
, &offset
))
10624 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
10625 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
10628 if (gdbarch_bits_big_endian (gdbarch
))
10630 /* For big endian bits, the DW_AT_bit_offset gives the
10631 additional bit offset from the MSB of the containing
10632 anonymous object to the MSB of the field. We don't
10633 have to do anything special since we don't need to
10634 know the size of the anonymous object. */
10635 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
10639 /* For little endian bits, compute the bit offset to the
10640 MSB of the anonymous object, subtract off the number of
10641 bits from the MSB of the field to the MSB of the
10642 object, and then subtract off the number of bits of
10643 the field itself. The result is the bit offset of
10644 the LSB of the field. */
10645 int anonymous_size
;
10646 int bit_offset
= DW_UNSND (attr
);
10648 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
10651 /* The size of the anonymous object containing
10652 the bit field is explicit, so use the
10653 indicated size (in bytes). */
10654 anonymous_size
= DW_UNSND (attr
);
10658 /* The size of the anonymous object containing
10659 the bit field must be inferred from the type
10660 attribute of the data member containing the
10662 anonymous_size
= TYPE_LENGTH (fp
->type
);
10664 SET_FIELD_BITPOS (*fp
,
10665 (FIELD_BITPOS (*fp
)
10666 + anonymous_size
* bits_per_byte
10667 - bit_offset
- FIELD_BITSIZE (*fp
)));
10671 /* Get name of field. */
10672 fieldname
= dwarf2_name (die
, cu
);
10673 if (fieldname
== NULL
)
10676 /* The name is already allocated along with this objfile, so we don't
10677 need to duplicate it for the type. */
10678 fp
->name
= fieldname
;
10680 /* Change accessibility for artificial fields (e.g. virtual table
10681 pointer or virtual base class pointer) to private. */
10682 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
10684 FIELD_ARTIFICIAL (*fp
) = 1;
10685 new_field
->accessibility
= DW_ACCESS_private
;
10686 fip
->non_public_fields
= 1;
10689 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
10691 /* C++ static member. */
10693 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
10694 is a declaration, but all versions of G++ as of this writing
10695 (so through at least 3.2.1) incorrectly generate
10696 DW_TAG_variable tags. */
10698 const char *physname
;
10700 /* Get name of field. */
10701 fieldname
= dwarf2_name (die
, cu
);
10702 if (fieldname
== NULL
)
10705 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
10707 /* Only create a symbol if this is an external value.
10708 new_symbol checks this and puts the value in the global symbol
10709 table, which we want. If it is not external, new_symbol
10710 will try to put the value in cu->list_in_scope which is wrong. */
10711 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
10713 /* A static const member, not much different than an enum as far as
10714 we're concerned, except that we can support more types. */
10715 new_symbol (die
, NULL
, cu
);
10718 /* Get physical name. */
10719 physname
= dwarf2_physname (fieldname
, die
, cu
);
10721 /* The name is already allocated along with this objfile, so we don't
10722 need to duplicate it for the type. */
10723 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
10724 FIELD_TYPE (*fp
) = die_type (die
, cu
);
10725 FIELD_NAME (*fp
) = fieldname
;
10727 else if (die
->tag
== DW_TAG_inheritance
)
10731 /* C++ base class field. */
10732 if (handle_data_member_location (die
, cu
, &offset
))
10733 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
10734 FIELD_BITSIZE (*fp
) = 0;
10735 FIELD_TYPE (*fp
) = die_type (die
, cu
);
10736 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
10737 fip
->nbaseclasses
++;
10741 /* Add a typedef defined in the scope of the FIP's class. */
10744 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
10745 struct dwarf2_cu
*cu
)
10747 struct objfile
*objfile
= cu
->objfile
;
10748 struct typedef_field_list
*new_field
;
10749 struct attribute
*attr
;
10750 struct typedef_field
*fp
;
10751 char *fieldname
= "";
10753 /* Allocate a new field list entry and link it in. */
10754 new_field
= xzalloc (sizeof (*new_field
));
10755 make_cleanup (xfree
, new_field
);
10757 gdb_assert (die
->tag
== DW_TAG_typedef
);
10759 fp
= &new_field
->field
;
10761 /* Get name of field. */
10762 fp
->name
= dwarf2_name (die
, cu
);
10763 if (fp
->name
== NULL
)
10766 fp
->type
= read_type_die (die
, cu
);
10768 new_field
->next
= fip
->typedef_field_list
;
10769 fip
->typedef_field_list
= new_field
;
10770 fip
->typedef_field_list_count
++;
10773 /* Create the vector of fields, and attach it to the type. */
10776 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
10777 struct dwarf2_cu
*cu
)
10779 int nfields
= fip
->nfields
;
10781 /* Record the field count, allocate space for the array of fields,
10782 and create blank accessibility bitfields if necessary. */
10783 TYPE_NFIELDS (type
) = nfields
;
10784 TYPE_FIELDS (type
) = (struct field
*)
10785 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
10786 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
10788 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
10790 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
10792 TYPE_FIELD_PRIVATE_BITS (type
) =
10793 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
10794 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
10796 TYPE_FIELD_PROTECTED_BITS (type
) =
10797 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
10798 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
10800 TYPE_FIELD_IGNORE_BITS (type
) =
10801 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
10802 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
10805 /* If the type has baseclasses, allocate and clear a bit vector for
10806 TYPE_FIELD_VIRTUAL_BITS. */
10807 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
10809 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
10810 unsigned char *pointer
;
10812 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
10813 pointer
= TYPE_ALLOC (type
, num_bytes
);
10814 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
10815 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
10816 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
10819 /* Copy the saved-up fields into the field vector. Start from the head of
10820 the list, adding to the tail of the field array, so that they end up in
10821 the same order in the array in which they were added to the list. */
10822 while (nfields
-- > 0)
10824 struct nextfield
*fieldp
;
10828 fieldp
= fip
->fields
;
10829 fip
->fields
= fieldp
->next
;
10833 fieldp
= fip
->baseclasses
;
10834 fip
->baseclasses
= fieldp
->next
;
10837 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
10838 switch (fieldp
->accessibility
)
10840 case DW_ACCESS_private
:
10841 if (cu
->language
!= language_ada
)
10842 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
10845 case DW_ACCESS_protected
:
10846 if (cu
->language
!= language_ada
)
10847 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
10850 case DW_ACCESS_public
:
10854 /* Unknown accessibility. Complain and treat it as public. */
10856 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
10857 fieldp
->accessibility
);
10861 if (nfields
< fip
->nbaseclasses
)
10863 switch (fieldp
->virtuality
)
10865 case DW_VIRTUALITY_virtual
:
10866 case DW_VIRTUALITY_pure_virtual
:
10867 if (cu
->language
== language_ada
)
10868 error (_("unexpected virtuality in component of Ada type"));
10869 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
10876 /* Return true if this member function is a constructor, false
10880 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
10882 const char *fieldname
;
10883 const char *typename
;
10886 if (die
->parent
== NULL
)
10889 if (die
->parent
->tag
!= DW_TAG_structure_type
10890 && die
->parent
->tag
!= DW_TAG_union_type
10891 && die
->parent
->tag
!= DW_TAG_class_type
)
10894 fieldname
= dwarf2_name (die
, cu
);
10895 typename
= dwarf2_name (die
->parent
, cu
);
10896 if (fieldname
== NULL
|| typename
== NULL
)
10899 len
= strlen (fieldname
);
10900 return (strncmp (fieldname
, typename
, len
) == 0
10901 && (typename
[len
] == '\0' || typename
[len
] == '<'));
10904 /* Add a member function to the proper fieldlist. */
10907 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
10908 struct type
*type
, struct dwarf2_cu
*cu
)
10910 struct objfile
*objfile
= cu
->objfile
;
10911 struct attribute
*attr
;
10912 struct fnfieldlist
*flp
;
10914 struct fn_field
*fnp
;
10915 const char *fieldname
;
10916 struct nextfnfield
*new_fnfield
;
10917 struct type
*this_type
;
10918 enum dwarf_access_attribute accessibility
;
10920 if (cu
->language
== language_ada
)
10921 error (_("unexpected member function in Ada type"));
10923 /* Get name of member function. */
10924 fieldname
= dwarf2_name (die
, cu
);
10925 if (fieldname
== NULL
)
10928 /* Look up member function name in fieldlist. */
10929 for (i
= 0; i
< fip
->nfnfields
; i
++)
10931 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
10935 /* Create new list element if necessary. */
10936 if (i
< fip
->nfnfields
)
10937 flp
= &fip
->fnfieldlists
[i
];
10940 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
10942 fip
->fnfieldlists
= (struct fnfieldlist
*)
10943 xrealloc (fip
->fnfieldlists
,
10944 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
10945 * sizeof (struct fnfieldlist
));
10946 if (fip
->nfnfields
== 0)
10947 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
10949 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
10950 flp
->name
= fieldname
;
10953 i
= fip
->nfnfields
++;
10956 /* Create a new member function field and chain it to the field list
10958 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
10959 make_cleanup (xfree
, new_fnfield
);
10960 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
10961 new_fnfield
->next
= flp
->head
;
10962 flp
->head
= new_fnfield
;
10965 /* Fill in the member function field info. */
10966 fnp
= &new_fnfield
->fnfield
;
10968 /* Delay processing of the physname until later. */
10969 if (cu
->language
== language_cplus
|| cu
->language
== language_java
)
10971 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
10976 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
10977 fnp
->physname
= physname
? physname
: "";
10980 fnp
->type
= alloc_type (objfile
);
10981 this_type
= read_type_die (die
, cu
);
10982 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
10984 int nparams
= TYPE_NFIELDS (this_type
);
10986 /* TYPE is the domain of this method, and THIS_TYPE is the type
10987 of the method itself (TYPE_CODE_METHOD). */
10988 smash_to_method_type (fnp
->type
, type
,
10989 TYPE_TARGET_TYPE (this_type
),
10990 TYPE_FIELDS (this_type
),
10991 TYPE_NFIELDS (this_type
),
10992 TYPE_VARARGS (this_type
));
10994 /* Handle static member functions.
10995 Dwarf2 has no clean way to discern C++ static and non-static
10996 member functions. G++ helps GDB by marking the first
10997 parameter for non-static member functions (which is the this
10998 pointer) as artificial. We obtain this information from
10999 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
11000 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
11001 fnp
->voffset
= VOFFSET_STATIC
;
11004 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
11005 dwarf2_full_name (fieldname
, die
, cu
));
11007 /* Get fcontext from DW_AT_containing_type if present. */
11008 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
11009 fnp
->fcontext
= die_containing_type (die
, cu
);
11011 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
11012 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
11014 /* Get accessibility. */
11015 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
11017 accessibility
= DW_UNSND (attr
);
11019 accessibility
= dwarf2_default_access_attribute (die
, cu
);
11020 switch (accessibility
)
11022 case DW_ACCESS_private
:
11023 fnp
->is_private
= 1;
11025 case DW_ACCESS_protected
:
11026 fnp
->is_protected
= 1;
11030 /* Check for artificial methods. */
11031 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
11032 if (attr
&& DW_UNSND (attr
) != 0)
11033 fnp
->is_artificial
= 1;
11035 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
11037 /* Get index in virtual function table if it is a virtual member
11038 function. For older versions of GCC, this is an offset in the
11039 appropriate virtual table, as specified by DW_AT_containing_type.
11040 For everyone else, it is an expression to be evaluated relative
11041 to the object address. */
11043 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
11046 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
11048 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
11050 /* Old-style GCC. */
11051 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
11053 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
11054 || (DW_BLOCK (attr
)->size
> 1
11055 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
11056 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
11058 struct dwarf_block blk
;
11061 offset
= (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
11063 blk
.size
= DW_BLOCK (attr
)->size
- offset
;
11064 blk
.data
= DW_BLOCK (attr
)->data
+ offset
;
11065 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
11066 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
11067 dwarf2_complex_location_expr_complaint ();
11069 fnp
->voffset
/= cu
->header
.addr_size
;
11073 dwarf2_complex_location_expr_complaint ();
11075 if (!fnp
->fcontext
)
11076 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
11078 else if (attr_form_is_section_offset (attr
))
11080 dwarf2_complex_location_expr_complaint ();
11084 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
11090 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
11091 if (attr
&& DW_UNSND (attr
))
11093 /* GCC does this, as of 2008-08-25; PR debug/37237. */
11094 complaint (&symfile_complaints
,
11095 _("Member function \"%s\" (offset %d) is virtual "
11096 "but the vtable offset is not specified"),
11097 fieldname
, die
->offset
.sect_off
);
11098 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
11099 TYPE_CPLUS_DYNAMIC (type
) = 1;
11104 /* Create the vector of member function fields, and attach it to the type. */
11107 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
11108 struct dwarf2_cu
*cu
)
11110 struct fnfieldlist
*flp
;
11113 if (cu
->language
== language_ada
)
11114 error (_("unexpected member functions in Ada type"));
11116 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
11117 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
11118 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
11120 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
11122 struct nextfnfield
*nfp
= flp
->head
;
11123 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
11126 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
11127 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
11128 fn_flp
->fn_fields
= (struct fn_field
*)
11129 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
11130 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
11131 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
11134 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
11137 /* Returns non-zero if NAME is the name of a vtable member in CU's
11138 language, zero otherwise. */
11140 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
11142 static const char vptr
[] = "_vptr";
11143 static const char vtable
[] = "vtable";
11145 /* Look for the C++ and Java forms of the vtable. */
11146 if ((cu
->language
== language_java
11147 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
11148 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
11149 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
11155 /* GCC outputs unnamed structures that are really pointers to member
11156 functions, with the ABI-specified layout. If TYPE describes
11157 such a structure, smash it into a member function type.
11159 GCC shouldn't do this; it should just output pointer to member DIEs.
11160 This is GCC PR debug/28767. */
11163 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
11165 struct type
*pfn_type
, *domain_type
, *new_type
;
11167 /* Check for a structure with no name and two children. */
11168 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
11171 /* Check for __pfn and __delta members. */
11172 if (TYPE_FIELD_NAME (type
, 0) == NULL
11173 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
11174 || TYPE_FIELD_NAME (type
, 1) == NULL
11175 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
11178 /* Find the type of the method. */
11179 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
11180 if (pfn_type
== NULL
11181 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
11182 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
11185 /* Look for the "this" argument. */
11186 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
11187 if (TYPE_NFIELDS (pfn_type
) == 0
11188 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
11189 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
11192 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
11193 new_type
= alloc_type (objfile
);
11194 smash_to_method_type (new_type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
11195 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
11196 TYPE_VARARGS (pfn_type
));
11197 smash_to_methodptr_type (type
, new_type
);
11200 /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler
11204 producer_is_icc (struct dwarf2_cu
*cu
)
11206 if (!cu
->checked_producer
)
11207 check_producer (cu
);
11209 return cu
->producer_is_icc
;
11212 /* Called when we find the DIE that starts a structure or union scope
11213 (definition) to create a type for the structure or union. Fill in
11214 the type's name and general properties; the members will not be
11215 processed until process_structure_type.
11217 NOTE: we need to call these functions regardless of whether or not the
11218 DIE has a DW_AT_name attribute, since it might be an anonymous
11219 structure or union. This gets the type entered into our set of
11220 user defined types.
11222 However, if the structure is incomplete (an opaque struct/union)
11223 then suppress creating a symbol table entry for it since gdb only
11224 wants to find the one with the complete definition. Note that if
11225 it is complete, we just call new_symbol, which does it's own
11226 checking about whether the struct/union is anonymous or not (and
11227 suppresses creating a symbol table entry itself). */
11229 static struct type
*
11230 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11232 struct objfile
*objfile
= cu
->objfile
;
11234 struct attribute
*attr
;
11237 /* If the definition of this type lives in .debug_types, read that type.
11238 Don't follow DW_AT_specification though, that will take us back up
11239 the chain and we want to go down. */
11240 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
11243 struct dwarf2_cu
*type_cu
= cu
;
11244 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
11246 /* We could just recurse on read_structure_type, but we need to call
11247 get_die_type to ensure only one type for this DIE is created.
11248 This is important, for example, because for c++ classes we need
11249 TYPE_NAME set which is only done by new_symbol. Blech. */
11250 type
= read_type_die (type_die
, type_cu
);
11252 /* TYPE_CU may not be the same as CU.
11253 Ensure TYPE is recorded in CU's type_hash table. */
11254 return set_die_type (die
, type
, cu
);
11257 type
= alloc_type (objfile
);
11258 INIT_CPLUS_SPECIFIC (type
);
11260 name
= dwarf2_name (die
, cu
);
11263 if (cu
->language
== language_cplus
11264 || cu
->language
== language_java
)
11266 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
11268 /* dwarf2_full_name might have already finished building the DIE's
11269 type. If so, there is no need to continue. */
11270 if (get_die_type (die
, cu
) != NULL
)
11271 return get_die_type (die
, cu
);
11273 TYPE_TAG_NAME (type
) = full_name
;
11274 if (die
->tag
== DW_TAG_structure_type
11275 || die
->tag
== DW_TAG_class_type
)
11276 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
11280 /* The name is already allocated along with this objfile, so
11281 we don't need to duplicate it for the type. */
11282 TYPE_TAG_NAME (type
) = name
;
11283 if (die
->tag
== DW_TAG_class_type
)
11284 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
11288 if (die
->tag
== DW_TAG_structure_type
)
11290 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
11292 else if (die
->tag
== DW_TAG_union_type
)
11294 TYPE_CODE (type
) = TYPE_CODE_UNION
;
11298 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
11301 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
11302 TYPE_DECLARED_CLASS (type
) = 1;
11304 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11307 TYPE_LENGTH (type
) = DW_UNSND (attr
);
11311 TYPE_LENGTH (type
) = 0;
11314 if (producer_is_icc (cu
))
11316 /* ICC does not output the required DW_AT_declaration
11317 on incomplete types, but gives them a size of zero. */
11320 TYPE_STUB_SUPPORTED (type
) = 1;
11322 if (die_is_declaration (die
, cu
))
11323 TYPE_STUB (type
) = 1;
11324 else if (attr
== NULL
&& die
->child
== NULL
11325 && producer_is_realview (cu
->producer
))
11326 /* RealView does not output the required DW_AT_declaration
11327 on incomplete types. */
11328 TYPE_STUB (type
) = 1;
11330 /* We need to add the type field to the die immediately so we don't
11331 infinitely recurse when dealing with pointers to the structure
11332 type within the structure itself. */
11333 set_die_type (die
, type
, cu
);
11335 /* set_die_type should be already done. */
11336 set_descriptive_type (type
, die
, cu
);
11341 /* Finish creating a structure or union type, including filling in
11342 its members and creating a symbol for it. */
11345 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11347 struct objfile
*objfile
= cu
->objfile
;
11348 struct die_info
*child_die
= die
->child
;
11351 type
= get_die_type (die
, cu
);
11353 type
= read_structure_type (die
, cu
);
11355 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
11357 struct field_info fi
;
11358 struct die_info
*child_die
;
11359 VEC (symbolp
) *template_args
= NULL
;
11360 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
11362 memset (&fi
, 0, sizeof (struct field_info
));
11364 child_die
= die
->child
;
11366 while (child_die
&& child_die
->tag
)
11368 if (child_die
->tag
== DW_TAG_member
11369 || child_die
->tag
== DW_TAG_variable
)
11371 /* NOTE: carlton/2002-11-05: A C++ static data member
11372 should be a DW_TAG_member that is a declaration, but
11373 all versions of G++ as of this writing (so through at
11374 least 3.2.1) incorrectly generate DW_TAG_variable
11375 tags for them instead. */
11376 dwarf2_add_field (&fi
, child_die
, cu
);
11378 else if (child_die
->tag
== DW_TAG_subprogram
)
11380 /* C++ member function. */
11381 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
11383 else if (child_die
->tag
== DW_TAG_inheritance
)
11385 /* C++ base class field. */
11386 dwarf2_add_field (&fi
, child_die
, cu
);
11388 else if (child_die
->tag
== DW_TAG_typedef
)
11389 dwarf2_add_typedef (&fi
, child_die
, cu
);
11390 else if (child_die
->tag
== DW_TAG_template_type_param
11391 || child_die
->tag
== DW_TAG_template_value_param
)
11393 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
11396 VEC_safe_push (symbolp
, template_args
, arg
);
11399 child_die
= sibling_die (child_die
);
11402 /* Attach template arguments to type. */
11403 if (! VEC_empty (symbolp
, template_args
))
11405 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
11406 TYPE_N_TEMPLATE_ARGUMENTS (type
)
11407 = VEC_length (symbolp
, template_args
);
11408 TYPE_TEMPLATE_ARGUMENTS (type
)
11409 = obstack_alloc (&objfile
->objfile_obstack
,
11410 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
11411 * sizeof (struct symbol
*)));
11412 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
11413 VEC_address (symbolp
, template_args
),
11414 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
11415 * sizeof (struct symbol
*)));
11416 VEC_free (symbolp
, template_args
);
11419 /* Attach fields and member functions to the type. */
11421 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
11424 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
11426 /* Get the type which refers to the base class (possibly this
11427 class itself) which contains the vtable pointer for the current
11428 class from the DW_AT_containing_type attribute. This use of
11429 DW_AT_containing_type is a GNU extension. */
11431 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
11433 struct type
*t
= die_containing_type (die
, cu
);
11435 TYPE_VPTR_BASETYPE (type
) = t
;
11440 /* Our own class provides vtbl ptr. */
11441 for (i
= TYPE_NFIELDS (t
) - 1;
11442 i
>= TYPE_N_BASECLASSES (t
);
11445 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
11447 if (is_vtable_name (fieldname
, cu
))
11449 TYPE_VPTR_FIELDNO (type
) = i
;
11454 /* Complain if virtual function table field not found. */
11455 if (i
< TYPE_N_BASECLASSES (t
))
11456 complaint (&symfile_complaints
,
11457 _("virtual function table pointer "
11458 "not found when defining class '%s'"),
11459 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
11464 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
11467 else if (cu
->producer
11468 && strncmp (cu
->producer
,
11469 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
11471 /* The IBM XLC compiler does not provide direct indication
11472 of the containing type, but the vtable pointer is
11473 always named __vfp. */
11477 for (i
= TYPE_NFIELDS (type
) - 1;
11478 i
>= TYPE_N_BASECLASSES (type
);
11481 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
11483 TYPE_VPTR_FIELDNO (type
) = i
;
11484 TYPE_VPTR_BASETYPE (type
) = type
;
11491 /* Copy fi.typedef_field_list linked list elements content into the
11492 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
11493 if (fi
.typedef_field_list
)
11495 int i
= fi
.typedef_field_list_count
;
11497 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
11498 TYPE_TYPEDEF_FIELD_ARRAY (type
)
11499 = TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
);
11500 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
11502 /* Reverse the list order to keep the debug info elements order. */
11505 struct typedef_field
*dest
, *src
;
11507 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
11508 src
= &fi
.typedef_field_list
->field
;
11509 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
11514 do_cleanups (back_to
);
11516 if (HAVE_CPLUS_STRUCT (type
))
11517 TYPE_CPLUS_REALLY_JAVA (type
) = cu
->language
== language_java
;
11520 quirk_gcc_member_function_pointer (type
, objfile
);
11522 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
11523 snapshots) has been known to create a die giving a declaration
11524 for a class that has, as a child, a die giving a definition for a
11525 nested class. So we have to process our children even if the
11526 current die is a declaration. Normally, of course, a declaration
11527 won't have any children at all. */
11529 while (child_die
!= NULL
&& child_die
->tag
)
11531 if (child_die
->tag
== DW_TAG_member
11532 || child_die
->tag
== DW_TAG_variable
11533 || child_die
->tag
== DW_TAG_inheritance
11534 || child_die
->tag
== DW_TAG_template_value_param
11535 || child_die
->tag
== DW_TAG_template_type_param
)
11540 process_die (child_die
, cu
);
11542 child_die
= sibling_die (child_die
);
11545 /* Do not consider external references. According to the DWARF standard,
11546 these DIEs are identified by the fact that they have no byte_size
11547 attribute, and a declaration attribute. */
11548 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
11549 || !die_is_declaration (die
, cu
))
11550 new_symbol (die
, type
, cu
);
11553 /* Given a DW_AT_enumeration_type die, set its type. We do not
11554 complete the type's fields yet, or create any symbols. */
11556 static struct type
*
11557 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11559 struct objfile
*objfile
= cu
->objfile
;
11561 struct attribute
*attr
;
11564 /* If the definition of this type lives in .debug_types, read that type.
11565 Don't follow DW_AT_specification though, that will take us back up
11566 the chain and we want to go down. */
11567 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
11570 struct dwarf2_cu
*type_cu
= cu
;
11571 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
11573 type
= read_type_die (type_die
, type_cu
);
11575 /* TYPE_CU may not be the same as CU.
11576 Ensure TYPE is recorded in CU's type_hash table. */
11577 return set_die_type (die
, type
, cu
);
11580 type
= alloc_type (objfile
);
11582 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
11583 name
= dwarf2_full_name (NULL
, die
, cu
);
11585 TYPE_TAG_NAME (type
) = name
;
11587 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11590 TYPE_LENGTH (type
) = DW_UNSND (attr
);
11594 TYPE_LENGTH (type
) = 0;
11597 /* The enumeration DIE can be incomplete. In Ada, any type can be
11598 declared as private in the package spec, and then defined only
11599 inside the package body. Such types are known as Taft Amendment
11600 Types. When another package uses such a type, an incomplete DIE
11601 may be generated by the compiler. */
11602 if (die_is_declaration (die
, cu
))
11603 TYPE_STUB (type
) = 1;
11605 return set_die_type (die
, type
, cu
);
11608 /* Given a pointer to a die which begins an enumeration, process all
11609 the dies that define the members of the enumeration, and create the
11610 symbol for the enumeration type.
11612 NOTE: We reverse the order of the element list. */
11615 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11617 struct type
*this_type
;
11619 this_type
= get_die_type (die
, cu
);
11620 if (this_type
== NULL
)
11621 this_type
= read_enumeration_type (die
, cu
);
11623 if (die
->child
!= NULL
)
11625 struct die_info
*child_die
;
11626 struct symbol
*sym
;
11627 struct field
*fields
= NULL
;
11628 int num_fields
= 0;
11629 int unsigned_enum
= 1;
11634 child_die
= die
->child
;
11635 while (child_die
&& child_die
->tag
)
11637 if (child_die
->tag
!= DW_TAG_enumerator
)
11639 process_die (child_die
, cu
);
11643 name
= dwarf2_name (child_die
, cu
);
11646 sym
= new_symbol (child_die
, this_type
, cu
);
11647 if (SYMBOL_VALUE (sym
) < 0)
11652 else if ((mask
& SYMBOL_VALUE (sym
)) != 0)
11655 mask
|= SYMBOL_VALUE (sym
);
11657 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
11659 fields
= (struct field
*)
11661 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
11662 * sizeof (struct field
));
11665 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
11666 FIELD_TYPE (fields
[num_fields
]) = NULL
;
11667 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
11668 FIELD_BITSIZE (fields
[num_fields
]) = 0;
11674 child_die
= sibling_die (child_die
);
11679 TYPE_NFIELDS (this_type
) = num_fields
;
11680 TYPE_FIELDS (this_type
) = (struct field
*)
11681 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
11682 memcpy (TYPE_FIELDS (this_type
), fields
,
11683 sizeof (struct field
) * num_fields
);
11687 TYPE_UNSIGNED (this_type
) = 1;
11689 TYPE_FLAG_ENUM (this_type
) = 1;
11692 /* If we are reading an enum from a .debug_types unit, and the enum
11693 is a declaration, and the enum is not the signatured type in the
11694 unit, then we do not want to add a symbol for it. Adding a
11695 symbol would in some cases obscure the true definition of the
11696 enum, giving users an incomplete type when the definition is
11697 actually available. Note that we do not want to do this for all
11698 enums which are just declarations, because C++0x allows forward
11699 enum declarations. */
11700 if (cu
->per_cu
->is_debug_types
11701 && die_is_declaration (die
, cu
))
11703 struct signatured_type
*sig_type
;
11706 = lookup_signatured_type_at_offset (dwarf2_per_objfile
->objfile
,
11707 cu
->per_cu
->info_or_types_section
,
11708 cu
->per_cu
->offset
);
11709 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
11710 if (sig_type
->type_offset_in_section
.sect_off
!= die
->offset
.sect_off
)
11714 new_symbol (die
, this_type
, cu
);
11717 /* Extract all information from a DW_TAG_array_type DIE and put it in
11718 the DIE's type field. For now, this only handles one dimensional
11721 static struct type
*
11722 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11724 struct objfile
*objfile
= cu
->objfile
;
11725 struct die_info
*child_die
;
11727 struct type
*element_type
, *range_type
, *index_type
;
11728 struct type
**range_types
= NULL
;
11729 struct attribute
*attr
;
11731 struct cleanup
*back_to
;
11734 element_type
= die_type (die
, cu
);
11736 /* The die_type call above may have already set the type for this DIE. */
11737 type
= get_die_type (die
, cu
);
11741 /* Irix 6.2 native cc creates array types without children for
11742 arrays with unspecified length. */
11743 if (die
->child
== NULL
)
11745 index_type
= objfile_type (objfile
)->builtin_int
;
11746 range_type
= create_range_type (NULL
, index_type
, 0, -1);
11747 type
= create_array_type (NULL
, element_type
, range_type
);
11748 return set_die_type (die
, type
, cu
);
11751 back_to
= make_cleanup (null_cleanup
, NULL
);
11752 child_die
= die
->child
;
11753 while (child_die
&& child_die
->tag
)
11755 if (child_die
->tag
== DW_TAG_subrange_type
)
11757 struct type
*child_type
= read_type_die (child_die
, cu
);
11759 if (child_type
!= NULL
)
11761 /* The range type was succesfully read. Save it for the
11762 array type creation. */
11763 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
11765 range_types
= (struct type
**)
11766 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
11767 * sizeof (struct type
*));
11769 make_cleanup (free_current_contents
, &range_types
);
11771 range_types
[ndim
++] = child_type
;
11774 child_die
= sibling_die (child_die
);
11777 /* Dwarf2 dimensions are output from left to right, create the
11778 necessary array types in backwards order. */
11780 type
= element_type
;
11782 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
11787 type
= create_array_type (NULL
, type
, range_types
[i
++]);
11792 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
11795 /* Understand Dwarf2 support for vector types (like they occur on
11796 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
11797 array type. This is not part of the Dwarf2/3 standard yet, but a
11798 custom vendor extension. The main difference between a regular
11799 array and the vector variant is that vectors are passed by value
11801 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
11803 make_vector_type (type
);
11805 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
11806 implementation may choose to implement triple vectors using this
11808 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11811 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
11812 TYPE_LENGTH (type
) = DW_UNSND (attr
);
11814 complaint (&symfile_complaints
,
11815 _("DW_AT_byte_size for array type smaller "
11816 "than the total size of elements"));
11819 name
= dwarf2_name (die
, cu
);
11821 TYPE_NAME (type
) = name
;
11823 /* Install the type in the die. */
11824 set_die_type (die
, type
, cu
);
11826 /* set_die_type should be already done. */
11827 set_descriptive_type (type
, die
, cu
);
11829 do_cleanups (back_to
);
11834 static enum dwarf_array_dim_ordering
11835 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
11837 struct attribute
*attr
;
11839 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
11841 if (attr
) return DW_SND (attr
);
11843 /* GNU F77 is a special case, as at 08/2004 array type info is the
11844 opposite order to the dwarf2 specification, but data is still
11845 laid out as per normal fortran.
11847 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
11848 version checking. */
11850 if (cu
->language
== language_fortran
11851 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
11853 return DW_ORD_row_major
;
11856 switch (cu
->language_defn
->la_array_ordering
)
11858 case array_column_major
:
11859 return DW_ORD_col_major
;
11860 case array_row_major
:
11862 return DW_ORD_row_major
;
11866 /* Extract all information from a DW_TAG_set_type DIE and put it in
11867 the DIE's type field. */
11869 static struct type
*
11870 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11872 struct type
*domain_type
, *set_type
;
11873 struct attribute
*attr
;
11875 domain_type
= die_type (die
, cu
);
11877 /* The die_type call above may have already set the type for this DIE. */
11878 set_type
= get_die_type (die
, cu
);
11882 set_type
= create_set_type (NULL
, domain_type
);
11884 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11886 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
11888 return set_die_type (die
, set_type
, cu
);
11891 /* A helper for read_common_block that creates a locexpr baton.
11892 SYM is the symbol which we are marking as computed.
11893 COMMON_DIE is the DIE for the common block.
11894 COMMON_LOC is the location expression attribute for the common
11896 MEMBER_LOC is the location expression attribute for the particular
11897 member of the common block that we are processing.
11898 CU is the CU from which the above come. */
11901 mark_common_block_symbol_computed (struct symbol
*sym
,
11902 struct die_info
*common_die
,
11903 struct attribute
*common_loc
,
11904 struct attribute
*member_loc
,
11905 struct dwarf2_cu
*cu
)
11907 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11908 struct dwarf2_locexpr_baton
*baton
;
11910 unsigned int cu_off
;
11911 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
11912 LONGEST offset
= 0;
11914 gdb_assert (common_loc
&& member_loc
);
11915 gdb_assert (attr_form_is_block (common_loc
));
11916 gdb_assert (attr_form_is_block (member_loc
)
11917 || attr_form_is_constant (member_loc
));
11919 baton
= obstack_alloc (&objfile
->objfile_obstack
,
11920 sizeof (struct dwarf2_locexpr_baton
));
11921 baton
->per_cu
= cu
->per_cu
;
11922 gdb_assert (baton
->per_cu
);
11924 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
11926 if (attr_form_is_constant (member_loc
))
11928 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
11929 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
11932 baton
->size
+= DW_BLOCK (member_loc
)->size
;
11934 ptr
= obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
11937 *ptr
++ = DW_OP_call4
;
11938 cu_off
= common_die
->offset
.sect_off
- cu
->per_cu
->offset
.sect_off
;
11939 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
11942 if (attr_form_is_constant (member_loc
))
11944 *ptr
++ = DW_OP_addr
;
11945 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
11946 ptr
+= cu
->header
.addr_size
;
11950 /* We have to copy the data here, because DW_OP_call4 will only
11951 use a DW_AT_location attribute. */
11952 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
11953 ptr
+= DW_BLOCK (member_loc
)->size
;
11956 *ptr
++ = DW_OP_plus
;
11957 gdb_assert (ptr
- baton
->data
== baton
->size
);
11959 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
11960 SYMBOL_LOCATION_BATON (sym
) = baton
;
11961 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
11964 /* Create appropriate locally-scoped variables for all the
11965 DW_TAG_common_block entries. Also create a struct common_block
11966 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
11967 is used to sepate the common blocks name namespace from regular
11971 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
11973 struct attribute
*attr
;
11975 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
11978 /* Support the .debug_loc offsets. */
11979 if (attr_form_is_block (attr
))
11983 else if (attr_form_is_section_offset (attr
))
11985 dwarf2_complex_location_expr_complaint ();
11990 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
11991 "common block member");
11996 if (die
->child
!= NULL
)
11998 struct objfile
*objfile
= cu
->objfile
;
11999 struct die_info
*child_die
;
12000 size_t n_entries
= 0, size
;
12001 struct common_block
*common_block
;
12002 struct symbol
*sym
;
12004 for (child_die
= die
->child
;
12005 child_die
&& child_die
->tag
;
12006 child_die
= sibling_die (child_die
))
12009 size
= (sizeof (struct common_block
)
12010 + (n_entries
- 1) * sizeof (struct symbol
*));
12011 common_block
= obstack_alloc (&objfile
->objfile_obstack
, size
);
12012 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
12013 common_block
->n_entries
= 0;
12015 for (child_die
= die
->child
;
12016 child_die
&& child_die
->tag
;
12017 child_die
= sibling_die (child_die
))
12019 /* Create the symbol in the DW_TAG_common_block block in the current
12021 sym
= new_symbol (child_die
, NULL
, cu
);
12024 struct attribute
*member_loc
;
12026 common_block
->contents
[common_block
->n_entries
++] = sym
;
12028 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
12032 /* GDB has handled this for a long time, but it is
12033 not specified by DWARF. It seems to have been
12034 emitted by gfortran at least as recently as:
12035 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
12036 complaint (&symfile_complaints
,
12037 _("Variable in common block has "
12038 "DW_AT_data_member_location "
12039 "- DIE at 0x%x [in module %s]"),
12040 child_die
->offset
.sect_off
, cu
->objfile
->name
);
12042 if (attr_form_is_section_offset (member_loc
))
12043 dwarf2_complex_location_expr_complaint ();
12044 else if (attr_form_is_constant (member_loc
)
12045 || attr_form_is_block (member_loc
))
12048 mark_common_block_symbol_computed (sym
, die
, attr
,
12052 dwarf2_complex_location_expr_complaint ();
12057 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
12058 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
12062 /* Create a type for a C++ namespace. */
12064 static struct type
*
12065 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12067 struct objfile
*objfile
= cu
->objfile
;
12068 const char *previous_prefix
, *name
;
12072 /* For extensions, reuse the type of the original namespace. */
12073 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
12075 struct die_info
*ext_die
;
12076 struct dwarf2_cu
*ext_cu
= cu
;
12078 ext_die
= dwarf2_extension (die
, &ext_cu
);
12079 type
= read_type_die (ext_die
, ext_cu
);
12081 /* EXT_CU may not be the same as CU.
12082 Ensure TYPE is recorded in CU's type_hash table. */
12083 return set_die_type (die
, type
, cu
);
12086 name
= namespace_name (die
, &is_anonymous
, cu
);
12088 /* Now build the name of the current namespace. */
12090 previous_prefix
= determine_prefix (die
, cu
);
12091 if (previous_prefix
[0] != '\0')
12092 name
= typename_concat (&objfile
->objfile_obstack
,
12093 previous_prefix
, name
, 0, cu
);
12095 /* Create the type. */
12096 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
12098 TYPE_NAME (type
) = name
;
12099 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
12101 return set_die_type (die
, type
, cu
);
12104 /* Read a C++ namespace. */
12107 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
12109 struct objfile
*objfile
= cu
->objfile
;
12112 /* Add a symbol associated to this if we haven't seen the namespace
12113 before. Also, add a using directive if it's an anonymous
12116 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
12120 type
= read_type_die (die
, cu
);
12121 new_symbol (die
, type
, cu
);
12123 namespace_name (die
, &is_anonymous
, cu
);
12126 const char *previous_prefix
= determine_prefix (die
, cu
);
12128 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
), NULL
,
12129 NULL
, NULL
, 0, &objfile
->objfile_obstack
);
12133 if (die
->child
!= NULL
)
12135 struct die_info
*child_die
= die
->child
;
12137 while (child_die
&& child_die
->tag
)
12139 process_die (child_die
, cu
);
12140 child_die
= sibling_die (child_die
);
12145 /* Read a Fortran module as type. This DIE can be only a declaration used for
12146 imported module. Still we need that type as local Fortran "use ... only"
12147 declaration imports depend on the created type in determine_prefix. */
12149 static struct type
*
12150 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12152 struct objfile
*objfile
= cu
->objfile
;
12153 const char *module_name
;
12156 module_name
= dwarf2_name (die
, cu
);
12158 complaint (&symfile_complaints
,
12159 _("DW_TAG_module has no name, offset 0x%x"),
12160 die
->offset
.sect_off
);
12161 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
12163 /* determine_prefix uses TYPE_TAG_NAME. */
12164 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
12166 return set_die_type (die
, type
, cu
);
12169 /* Read a Fortran module. */
12172 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
12174 struct die_info
*child_die
= die
->child
;
12176 while (child_die
&& child_die
->tag
)
12178 process_die (child_die
, cu
);
12179 child_die
= sibling_die (child_die
);
12183 /* Return the name of the namespace represented by DIE. Set
12184 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
12187 static const char *
12188 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
12190 struct die_info
*current_die
;
12191 const char *name
= NULL
;
12193 /* Loop through the extensions until we find a name. */
12195 for (current_die
= die
;
12196 current_die
!= NULL
;
12197 current_die
= dwarf2_extension (die
, &cu
))
12199 name
= dwarf2_name (current_die
, cu
);
12204 /* Is it an anonymous namespace? */
12206 *is_anonymous
= (name
== NULL
);
12208 name
= CP_ANONYMOUS_NAMESPACE_STR
;
12213 /* Extract all information from a DW_TAG_pointer_type DIE and add to
12214 the user defined type vector. */
12216 static struct type
*
12217 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12219 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
12220 struct comp_unit_head
*cu_header
= &cu
->header
;
12222 struct attribute
*attr_byte_size
;
12223 struct attribute
*attr_address_class
;
12224 int byte_size
, addr_class
;
12225 struct type
*target_type
;
12227 target_type
= die_type (die
, cu
);
12229 /* The die_type call above may have already set the type for this DIE. */
12230 type
= get_die_type (die
, cu
);
12234 type
= lookup_pointer_type (target_type
);
12236 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12237 if (attr_byte_size
)
12238 byte_size
= DW_UNSND (attr_byte_size
);
12240 byte_size
= cu_header
->addr_size
;
12242 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
12243 if (attr_address_class
)
12244 addr_class
= DW_UNSND (attr_address_class
);
12246 addr_class
= DW_ADDR_none
;
12248 /* If the pointer size or address class is different than the
12249 default, create a type variant marked as such and set the
12250 length accordingly. */
12251 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
12253 if (gdbarch_address_class_type_flags_p (gdbarch
))
12257 type_flags
= gdbarch_address_class_type_flags
12258 (gdbarch
, byte_size
, addr_class
);
12259 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
12261 type
= make_type_with_address_space (type
, type_flags
);
12263 else if (TYPE_LENGTH (type
) != byte_size
)
12265 complaint (&symfile_complaints
,
12266 _("invalid pointer size %d"), byte_size
);
12270 /* Should we also complain about unhandled address classes? */
12274 TYPE_LENGTH (type
) = byte_size
;
12275 return set_die_type (die
, type
, cu
);
12278 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
12279 the user defined type vector. */
12281 static struct type
*
12282 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12285 struct type
*to_type
;
12286 struct type
*domain
;
12288 to_type
= die_type (die
, cu
);
12289 domain
= die_containing_type (die
, cu
);
12291 /* The calls above may have already set the type for this DIE. */
12292 type
= get_die_type (die
, cu
);
12296 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
12297 type
= lookup_methodptr_type (to_type
);
12298 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
12300 struct type
*new_type
= alloc_type (cu
->objfile
);
12302 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
12303 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
12304 TYPE_VARARGS (to_type
));
12305 type
= lookup_methodptr_type (new_type
);
12308 type
= lookup_memberptr_type (to_type
, domain
);
12310 return set_die_type (die
, type
, cu
);
12313 /* Extract all information from a DW_TAG_reference_type DIE and add to
12314 the user defined type vector. */
12316 static struct type
*
12317 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12319 struct comp_unit_head
*cu_header
= &cu
->header
;
12320 struct type
*type
, *target_type
;
12321 struct attribute
*attr
;
12323 target_type
= die_type (die
, cu
);
12325 /* The die_type call above may have already set the type for this DIE. */
12326 type
= get_die_type (die
, cu
);
12330 type
= lookup_reference_type (target_type
);
12331 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12334 TYPE_LENGTH (type
) = DW_UNSND (attr
);
12338 TYPE_LENGTH (type
) = cu_header
->addr_size
;
12340 return set_die_type (die
, type
, cu
);
12343 static struct type
*
12344 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12346 struct type
*base_type
, *cv_type
;
12348 base_type
= die_type (die
, cu
);
12350 /* The die_type call above may have already set the type for this DIE. */
12351 cv_type
= get_die_type (die
, cu
);
12355 /* In case the const qualifier is applied to an array type, the element type
12356 is so qualified, not the array type (section 6.7.3 of C99). */
12357 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
12359 struct type
*el_type
, *inner_array
;
12361 base_type
= copy_type (base_type
);
12362 inner_array
= base_type
;
12364 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
12366 TYPE_TARGET_TYPE (inner_array
) =
12367 copy_type (TYPE_TARGET_TYPE (inner_array
));
12368 inner_array
= TYPE_TARGET_TYPE (inner_array
);
12371 el_type
= TYPE_TARGET_TYPE (inner_array
);
12372 TYPE_TARGET_TYPE (inner_array
) =
12373 make_cv_type (1, TYPE_VOLATILE (el_type
), el_type
, NULL
);
12375 return set_die_type (die
, base_type
, cu
);
12378 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
12379 return set_die_type (die
, cv_type
, cu
);
12382 static struct type
*
12383 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12385 struct type
*base_type
, *cv_type
;
12387 base_type
= die_type (die
, cu
);
12389 /* The die_type call above may have already set the type for this DIE. */
12390 cv_type
= get_die_type (die
, cu
);
12394 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
12395 return set_die_type (die
, cv_type
, cu
);
12398 /* Handle DW_TAG_restrict_type. */
12400 static struct type
*
12401 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12403 struct type
*base_type
, *cv_type
;
12405 base_type
= die_type (die
, cu
);
12407 /* The die_type call above may have already set the type for this DIE. */
12408 cv_type
= get_die_type (die
, cu
);
12412 cv_type
= make_restrict_type (base_type
);
12413 return set_die_type (die
, cv_type
, cu
);
12416 /* Extract all information from a DW_TAG_string_type DIE and add to
12417 the user defined type vector. It isn't really a user defined type,
12418 but it behaves like one, with other DIE's using an AT_user_def_type
12419 attribute to reference it. */
12421 static struct type
*
12422 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12424 struct objfile
*objfile
= cu
->objfile
;
12425 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12426 struct type
*type
, *range_type
, *index_type
, *char_type
;
12427 struct attribute
*attr
;
12428 unsigned int length
;
12430 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
12433 length
= DW_UNSND (attr
);
12437 /* Check for the DW_AT_byte_size attribute. */
12438 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12441 length
= DW_UNSND (attr
);
12449 index_type
= objfile_type (objfile
)->builtin_int
;
12450 range_type
= create_range_type (NULL
, index_type
, 1, length
);
12451 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
12452 type
= create_string_type (NULL
, char_type
, range_type
);
12454 return set_die_type (die
, type
, cu
);
12457 /* Handle DIES due to C code like:
12461 int (*funcp)(int a, long l);
12465 ('funcp' generates a DW_TAG_subroutine_type DIE). */
12467 static struct type
*
12468 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12470 struct objfile
*objfile
= cu
->objfile
;
12471 struct type
*type
; /* Type that this function returns. */
12472 struct type
*ftype
; /* Function that returns above type. */
12473 struct attribute
*attr
;
12475 type
= die_type (die
, cu
);
12477 /* The die_type call above may have already set the type for this DIE. */
12478 ftype
= get_die_type (die
, cu
);
12482 ftype
= lookup_function_type (type
);
12484 /* All functions in C++, Pascal and Java have prototypes. */
12485 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
12486 if ((attr
&& (DW_UNSND (attr
) != 0))
12487 || cu
->language
== language_cplus
12488 || cu
->language
== language_java
12489 || cu
->language
== language_pascal
)
12490 TYPE_PROTOTYPED (ftype
) = 1;
12491 else if (producer_is_realview (cu
->producer
))
12492 /* RealView does not emit DW_AT_prototyped. We can not
12493 distinguish prototyped and unprototyped functions; default to
12494 prototyped, since that is more common in modern code (and
12495 RealView warns about unprototyped functions). */
12496 TYPE_PROTOTYPED (ftype
) = 1;
12498 /* Store the calling convention in the type if it's available in
12499 the subroutine die. Otherwise set the calling convention to
12500 the default value DW_CC_normal. */
12501 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
12503 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
12504 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
12505 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
12507 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
12509 /* We need to add the subroutine type to the die immediately so
12510 we don't infinitely recurse when dealing with parameters
12511 declared as the same subroutine type. */
12512 set_die_type (die
, ftype
, cu
);
12514 if (die
->child
!= NULL
)
12516 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
12517 struct die_info
*child_die
;
12518 int nparams
, iparams
;
12520 /* Count the number of parameters.
12521 FIXME: GDB currently ignores vararg functions, but knows about
12522 vararg member functions. */
12524 child_die
= die
->child
;
12525 while (child_die
&& child_die
->tag
)
12527 if (child_die
->tag
== DW_TAG_formal_parameter
)
12529 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
12530 TYPE_VARARGS (ftype
) = 1;
12531 child_die
= sibling_die (child_die
);
12534 /* Allocate storage for parameters and fill them in. */
12535 TYPE_NFIELDS (ftype
) = nparams
;
12536 TYPE_FIELDS (ftype
) = (struct field
*)
12537 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
12539 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
12540 even if we error out during the parameters reading below. */
12541 for (iparams
= 0; iparams
< nparams
; iparams
++)
12542 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
12545 child_die
= die
->child
;
12546 while (child_die
&& child_die
->tag
)
12548 if (child_die
->tag
== DW_TAG_formal_parameter
)
12550 struct type
*arg_type
;
12552 /* DWARF version 2 has no clean way to discern C++
12553 static and non-static member functions. G++ helps
12554 GDB by marking the first parameter for non-static
12555 member functions (which is the this pointer) as
12556 artificial. We pass this information to
12557 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
12559 DWARF version 3 added DW_AT_object_pointer, which GCC
12560 4.5 does not yet generate. */
12561 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
12563 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
12566 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
12568 /* GCC/43521: In java, the formal parameter
12569 "this" is sometimes not marked with DW_AT_artificial. */
12570 if (cu
->language
== language_java
)
12572 const char *name
= dwarf2_name (child_die
, cu
);
12574 if (name
&& !strcmp (name
, "this"))
12575 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
12578 arg_type
= die_type (child_die
, cu
);
12580 /* RealView does not mark THIS as const, which the testsuite
12581 expects. GCC marks THIS as const in method definitions,
12582 but not in the class specifications (GCC PR 43053). */
12583 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
12584 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
12587 struct dwarf2_cu
*arg_cu
= cu
;
12588 const char *name
= dwarf2_name (child_die
, cu
);
12590 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
12593 /* If the compiler emits this, use it. */
12594 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
12597 else if (name
&& strcmp (name
, "this") == 0)
12598 /* Function definitions will have the argument names. */
12600 else if (name
== NULL
&& iparams
== 0)
12601 /* Declarations may not have the names, so like
12602 elsewhere in GDB, assume an artificial first
12603 argument is "this". */
12607 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
12611 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
12614 child_die
= sibling_die (child_die
);
12621 static struct type
*
12622 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
12624 struct objfile
*objfile
= cu
->objfile
;
12625 const char *name
= NULL
;
12626 struct type
*this_type
, *target_type
;
12628 name
= dwarf2_full_name (NULL
, die
, cu
);
12629 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
12630 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
12631 TYPE_NAME (this_type
) = name
;
12632 set_die_type (die
, this_type
, cu
);
12633 target_type
= die_type (die
, cu
);
12634 if (target_type
!= this_type
)
12635 TYPE_TARGET_TYPE (this_type
) = target_type
;
12638 /* Self-referential typedefs are, it seems, not allowed by the DWARF
12639 spec and cause infinite loops in GDB. */
12640 complaint (&symfile_complaints
,
12641 _("Self-referential DW_TAG_typedef "
12642 "- DIE at 0x%x [in module %s]"),
12643 die
->offset
.sect_off
, objfile
->name
);
12644 TYPE_TARGET_TYPE (this_type
) = NULL
;
12649 /* Find a representation of a given base type and install
12650 it in the TYPE field of the die. */
12652 static struct type
*
12653 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12655 struct objfile
*objfile
= cu
->objfile
;
12657 struct attribute
*attr
;
12658 int encoding
= 0, size
= 0;
12660 enum type_code code
= TYPE_CODE_INT
;
12661 int type_flags
= 0;
12662 struct type
*target_type
= NULL
;
12664 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
12667 encoding
= DW_UNSND (attr
);
12669 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12672 size
= DW_UNSND (attr
);
12674 name
= dwarf2_name (die
, cu
);
12677 complaint (&symfile_complaints
,
12678 _("DW_AT_name missing from DW_TAG_base_type"));
12683 case DW_ATE_address
:
12684 /* Turn DW_ATE_address into a void * pointer. */
12685 code
= TYPE_CODE_PTR
;
12686 type_flags
|= TYPE_FLAG_UNSIGNED
;
12687 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
12689 case DW_ATE_boolean
:
12690 code
= TYPE_CODE_BOOL
;
12691 type_flags
|= TYPE_FLAG_UNSIGNED
;
12693 case DW_ATE_complex_float
:
12694 code
= TYPE_CODE_COMPLEX
;
12695 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
12697 case DW_ATE_decimal_float
:
12698 code
= TYPE_CODE_DECFLOAT
;
12701 code
= TYPE_CODE_FLT
;
12703 case DW_ATE_signed
:
12705 case DW_ATE_unsigned
:
12706 type_flags
|= TYPE_FLAG_UNSIGNED
;
12707 if (cu
->language
== language_fortran
12709 && strncmp (name
, "character(", sizeof ("character(") - 1) == 0)
12710 code
= TYPE_CODE_CHAR
;
12712 case DW_ATE_signed_char
:
12713 if (cu
->language
== language_ada
|| cu
->language
== language_m2
12714 || cu
->language
== language_pascal
12715 || cu
->language
== language_fortran
)
12716 code
= TYPE_CODE_CHAR
;
12718 case DW_ATE_unsigned_char
:
12719 if (cu
->language
== language_ada
|| cu
->language
== language_m2
12720 || cu
->language
== language_pascal
12721 || cu
->language
== language_fortran
)
12722 code
= TYPE_CODE_CHAR
;
12723 type_flags
|= TYPE_FLAG_UNSIGNED
;
12726 /* We just treat this as an integer and then recognize the
12727 type by name elsewhere. */
12731 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
12732 dwarf_type_encoding_name (encoding
));
12736 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
12737 TYPE_NAME (type
) = name
;
12738 TYPE_TARGET_TYPE (type
) = target_type
;
12740 if (name
&& strcmp (name
, "char") == 0)
12741 TYPE_NOSIGN (type
) = 1;
12743 return set_die_type (die
, type
, cu
);
12746 /* Read the given DW_AT_subrange DIE. */
12748 static struct type
*
12749 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12751 struct type
*base_type
, *orig_base_type
;
12752 struct type
*range_type
;
12753 struct attribute
*attr
;
12755 int low_default_is_valid
;
12757 LONGEST negative_mask
;
12759 orig_base_type
= die_type (die
, cu
);
12760 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
12761 whereas the real type might be. So, we use ORIG_BASE_TYPE when
12762 creating the range type, but we use the result of check_typedef
12763 when examining properties of the type. */
12764 base_type
= check_typedef (orig_base_type
);
12766 /* The die_type call above may have already set the type for this DIE. */
12767 range_type
= get_die_type (die
, cu
);
12771 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
12772 omitting DW_AT_lower_bound. */
12773 switch (cu
->language
)
12776 case language_cplus
:
12778 low_default_is_valid
= 1;
12780 case language_fortran
:
12782 low_default_is_valid
= 1;
12785 case language_java
:
12786 case language_objc
:
12788 low_default_is_valid
= (cu
->header
.version
>= 4);
12792 case language_pascal
:
12794 low_default_is_valid
= (cu
->header
.version
>= 4);
12798 low_default_is_valid
= 0;
12802 /* FIXME: For variable sized arrays either of these could be
12803 a variable rather than a constant value. We'll allow it,
12804 but we don't know how to handle it. */
12805 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
12807 low
= dwarf2_get_attr_constant_value (attr
, low
);
12808 else if (!low_default_is_valid
)
12809 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
12810 "- DIE at 0x%x [in module %s]"),
12811 die
->offset
.sect_off
, cu
->objfile
->name
);
12813 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
12816 if (attr_form_is_block (attr
) || is_ref_attr (attr
))
12818 /* GCC encodes arrays with unspecified or dynamic length
12819 with a DW_FORM_block1 attribute or a reference attribute.
12820 FIXME: GDB does not yet know how to handle dynamic
12821 arrays properly, treat them as arrays with unspecified
12824 FIXME: jimb/2003-09-22: GDB does not really know
12825 how to handle arrays of unspecified length
12826 either; we just represent them as zero-length
12827 arrays. Choose an appropriate upper bound given
12828 the lower bound we've computed above. */
12832 high
= dwarf2_get_attr_constant_value (attr
, 1);
12836 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
12839 int count
= dwarf2_get_attr_constant_value (attr
, 1);
12840 high
= low
+ count
- 1;
12844 /* Unspecified array length. */
12849 /* Dwarf-2 specifications explicitly allows to create subrange types
12850 without specifying a base type.
12851 In that case, the base type must be set to the type of
12852 the lower bound, upper bound or count, in that order, if any of these
12853 three attributes references an object that has a type.
12854 If no base type is found, the Dwarf-2 specifications say that
12855 a signed integer type of size equal to the size of an address should
12857 For the following C code: `extern char gdb_int [];'
12858 GCC produces an empty range DIE.
12859 FIXME: muller/2010-05-28: Possible references to object for low bound,
12860 high bound or count are not yet handled by this code. */
12861 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
12863 struct objfile
*objfile
= cu
->objfile
;
12864 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12865 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
12866 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
12868 /* Test "int", "long int", and "long long int" objfile types,
12869 and select the first one having a size above or equal to the
12870 architecture address size. */
12871 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
12872 base_type
= int_type
;
12875 int_type
= objfile_type (objfile
)->builtin_long
;
12876 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
12877 base_type
= int_type
;
12880 int_type
= objfile_type (objfile
)->builtin_long_long
;
12881 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
12882 base_type
= int_type
;
12888 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
12889 if (!TYPE_UNSIGNED (base_type
) && (low
& negative_mask
))
12890 low
|= negative_mask
;
12891 if (!TYPE_UNSIGNED (base_type
) && (high
& negative_mask
))
12892 high
|= negative_mask
;
12894 range_type
= create_range_type (NULL
, orig_base_type
, low
, high
);
12896 /* Mark arrays with dynamic length at least as an array of unspecified
12897 length. GDB could check the boundary but before it gets implemented at
12898 least allow accessing the array elements. */
12899 if (attr
&& attr_form_is_block (attr
))
12900 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
12902 /* Ada expects an empty array on no boundary attributes. */
12903 if (attr
== NULL
&& cu
->language
!= language_ada
)
12904 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
12906 name
= dwarf2_name (die
, cu
);
12908 TYPE_NAME (range_type
) = name
;
12910 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12912 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
12914 set_die_type (die
, range_type
, cu
);
12916 /* set_die_type should be already done. */
12917 set_descriptive_type (range_type
, die
, cu
);
12922 static struct type
*
12923 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12927 /* For now, we only support the C meaning of an unspecified type: void. */
12929 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
12930 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
12932 return set_die_type (die
, type
, cu
);
12935 /* Read a single die and all its descendents. Set the die's sibling
12936 field to NULL; set other fields in the die correctly, and set all
12937 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
12938 location of the info_ptr after reading all of those dies. PARENT
12939 is the parent of the die in question. */
12941 static struct die_info
*
12942 read_die_and_children (const struct die_reader_specs
*reader
,
12943 gdb_byte
*info_ptr
,
12944 gdb_byte
**new_info_ptr
,
12945 struct die_info
*parent
)
12947 struct die_info
*die
;
12951 cur_ptr
= read_full_die (reader
, &die
, info_ptr
, &has_children
);
12954 *new_info_ptr
= cur_ptr
;
12957 store_in_ref_table (die
, reader
->cu
);
12960 die
->child
= read_die_and_siblings (reader
, cur_ptr
, new_info_ptr
, die
);
12964 *new_info_ptr
= cur_ptr
;
12967 die
->sibling
= NULL
;
12968 die
->parent
= parent
;
12972 /* Read a die, all of its descendents, and all of its siblings; set
12973 all of the fields of all of the dies correctly. Arguments are as
12974 in read_die_and_children. */
12976 static struct die_info
*
12977 read_die_and_siblings (const struct die_reader_specs
*reader
,
12978 gdb_byte
*info_ptr
,
12979 gdb_byte
**new_info_ptr
,
12980 struct die_info
*parent
)
12982 struct die_info
*first_die
, *last_sibling
;
12985 cur_ptr
= info_ptr
;
12986 first_die
= last_sibling
= NULL
;
12990 struct die_info
*die
12991 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
12995 *new_info_ptr
= cur_ptr
;
13002 last_sibling
->sibling
= die
;
13004 last_sibling
= die
;
13008 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
13010 The caller is responsible for filling in the extra attributes
13011 and updating (*DIEP)->num_attrs.
13012 Set DIEP to point to a newly allocated die with its information,
13013 except for its child, sibling, and parent fields.
13014 Set HAS_CHILDREN to tell whether the die has children or not. */
13017 read_full_die_1 (const struct die_reader_specs
*reader
,
13018 struct die_info
**diep
, gdb_byte
*info_ptr
,
13019 int *has_children
, int num_extra_attrs
)
13021 unsigned int abbrev_number
, bytes_read
, i
;
13022 sect_offset offset
;
13023 struct abbrev_info
*abbrev
;
13024 struct die_info
*die
;
13025 struct dwarf2_cu
*cu
= reader
->cu
;
13026 bfd
*abfd
= reader
->abfd
;
13028 offset
.sect_off
= info_ptr
- reader
->buffer
;
13029 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
13030 info_ptr
+= bytes_read
;
13031 if (!abbrev_number
)
13038 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
13040 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
13042 bfd_get_filename (abfd
));
13044 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
13045 die
->offset
= offset
;
13046 die
->tag
= abbrev
->tag
;
13047 die
->abbrev
= abbrev_number
;
13049 /* Make the result usable.
13050 The caller needs to update num_attrs after adding the extra
13052 die
->num_attrs
= abbrev
->num_attrs
;
13054 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
13055 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
13059 *has_children
= abbrev
->has_children
;
13063 /* Read a die and all its attributes.
13064 Set DIEP to point to a newly allocated die with its information,
13065 except for its child, sibling, and parent fields.
13066 Set HAS_CHILDREN to tell whether the die has children or not. */
13069 read_full_die (const struct die_reader_specs
*reader
,
13070 struct die_info
**diep
, gdb_byte
*info_ptr
,
13073 return read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
13076 /* Abbreviation tables.
13078 In DWARF version 2, the description of the debugging information is
13079 stored in a separate .debug_abbrev section. Before we read any
13080 dies from a section we read in all abbreviations and install them
13081 in a hash table. */
13083 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
13085 static struct abbrev_info
*
13086 abbrev_table_alloc_abbrev (struct abbrev_table
*abbrev_table
)
13088 struct abbrev_info
*abbrev
;
13090 abbrev
= (struct abbrev_info
*)
13091 obstack_alloc (&abbrev_table
->abbrev_obstack
, sizeof (struct abbrev_info
));
13092 memset (abbrev
, 0, sizeof (struct abbrev_info
));
13096 /* Add an abbreviation to the table. */
13099 abbrev_table_add_abbrev (struct abbrev_table
*abbrev_table
,
13100 unsigned int abbrev_number
,
13101 struct abbrev_info
*abbrev
)
13103 unsigned int hash_number
;
13105 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
13106 abbrev
->next
= abbrev_table
->abbrevs
[hash_number
];
13107 abbrev_table
->abbrevs
[hash_number
] = abbrev
;
13110 /* Look up an abbrev in the table.
13111 Returns NULL if the abbrev is not found. */
13113 static struct abbrev_info
*
13114 abbrev_table_lookup_abbrev (const struct abbrev_table
*abbrev_table
,
13115 unsigned int abbrev_number
)
13117 unsigned int hash_number
;
13118 struct abbrev_info
*abbrev
;
13120 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
13121 abbrev
= abbrev_table
->abbrevs
[hash_number
];
13125 if (abbrev
->number
== abbrev_number
)
13127 abbrev
= abbrev
->next
;
13132 /* Read in an abbrev table. */
13134 static struct abbrev_table
*
13135 abbrev_table_read_table (struct dwarf2_section_info
*section
,
13136 sect_offset offset
)
13138 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13139 bfd
*abfd
= section
->asection
->owner
;
13140 struct abbrev_table
*abbrev_table
;
13141 gdb_byte
*abbrev_ptr
;
13142 struct abbrev_info
*cur_abbrev
;
13143 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
13144 unsigned int abbrev_form
;
13145 struct attr_abbrev
*cur_attrs
;
13146 unsigned int allocated_attrs
;
13148 abbrev_table
= XMALLOC (struct abbrev_table
);
13149 abbrev_table
->offset
= offset
;
13150 obstack_init (&abbrev_table
->abbrev_obstack
);
13151 abbrev_table
->abbrevs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
13153 * sizeof (struct abbrev_info
*)));
13154 memset (abbrev_table
->abbrevs
, 0,
13155 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
13157 dwarf2_read_section (objfile
, section
);
13158 abbrev_ptr
= section
->buffer
+ offset
.sect_off
;
13159 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13160 abbrev_ptr
+= bytes_read
;
13162 allocated_attrs
= ATTR_ALLOC_CHUNK
;
13163 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
13165 /* Loop until we reach an abbrev number of 0. */
13166 while (abbrev_number
)
13168 cur_abbrev
= abbrev_table_alloc_abbrev (abbrev_table
);
13170 /* read in abbrev header */
13171 cur_abbrev
->number
= abbrev_number
;
13172 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13173 abbrev_ptr
+= bytes_read
;
13174 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
13177 /* now read in declarations */
13178 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13179 abbrev_ptr
+= bytes_read
;
13180 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13181 abbrev_ptr
+= bytes_read
;
13182 while (abbrev_name
)
13184 if (cur_abbrev
->num_attrs
== allocated_attrs
)
13186 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
13188 = xrealloc (cur_attrs
, (allocated_attrs
13189 * sizeof (struct attr_abbrev
)));
13192 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
13193 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
13194 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13195 abbrev_ptr
+= bytes_read
;
13196 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13197 abbrev_ptr
+= bytes_read
;
13200 cur_abbrev
->attrs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
13201 (cur_abbrev
->num_attrs
13202 * sizeof (struct attr_abbrev
)));
13203 memcpy (cur_abbrev
->attrs
, cur_attrs
,
13204 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
13206 abbrev_table_add_abbrev (abbrev_table
, abbrev_number
, cur_abbrev
);
13208 /* Get next abbreviation.
13209 Under Irix6 the abbreviations for a compilation unit are not
13210 always properly terminated with an abbrev number of 0.
13211 Exit loop if we encounter an abbreviation which we have
13212 already read (which means we are about to read the abbreviations
13213 for the next compile unit) or if the end of the abbreviation
13214 table is reached. */
13215 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
13217 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13218 abbrev_ptr
+= bytes_read
;
13219 if (abbrev_table_lookup_abbrev (abbrev_table
, abbrev_number
) != NULL
)
13224 return abbrev_table
;
13227 /* Free the resources held by ABBREV_TABLE. */
13230 abbrev_table_free (struct abbrev_table
*abbrev_table
)
13232 obstack_free (&abbrev_table
->abbrev_obstack
, NULL
);
13233 xfree (abbrev_table
);
13236 /* Same as abbrev_table_free but as a cleanup.
13237 We pass in a pointer to the pointer to the table so that we can
13238 set the pointer to NULL when we're done. It also simplifies
13239 build_type_unit_groups. */
13242 abbrev_table_free_cleanup (void *table_ptr
)
13244 struct abbrev_table
**abbrev_table_ptr
= table_ptr
;
13246 if (*abbrev_table_ptr
!= NULL
)
13247 abbrev_table_free (*abbrev_table_ptr
);
13248 *abbrev_table_ptr
= NULL
;
13251 /* Read the abbrev table for CU from ABBREV_SECTION. */
13254 dwarf2_read_abbrevs (struct dwarf2_cu
*cu
,
13255 struct dwarf2_section_info
*abbrev_section
)
13258 abbrev_table_read_table (abbrev_section
, cu
->header
.abbrev_offset
);
13261 /* Release the memory used by the abbrev table for a compilation unit. */
13264 dwarf2_free_abbrev_table (void *ptr_to_cu
)
13266 struct dwarf2_cu
*cu
= ptr_to_cu
;
13268 abbrev_table_free (cu
->abbrev_table
);
13269 /* Set this to NULL so that we SEGV if we try to read it later,
13270 and also because free_comp_unit verifies this is NULL. */
13271 cu
->abbrev_table
= NULL
;
13274 /* Returns nonzero if TAG represents a type that we might generate a partial
13278 is_type_tag_for_partial (int tag
)
13283 /* Some types that would be reasonable to generate partial symbols for,
13284 that we don't at present. */
13285 case DW_TAG_array_type
:
13286 case DW_TAG_file_type
:
13287 case DW_TAG_ptr_to_member_type
:
13288 case DW_TAG_set_type
:
13289 case DW_TAG_string_type
:
13290 case DW_TAG_subroutine_type
:
13292 case DW_TAG_base_type
:
13293 case DW_TAG_class_type
:
13294 case DW_TAG_interface_type
:
13295 case DW_TAG_enumeration_type
:
13296 case DW_TAG_structure_type
:
13297 case DW_TAG_subrange_type
:
13298 case DW_TAG_typedef
:
13299 case DW_TAG_union_type
:
13306 /* Load all DIEs that are interesting for partial symbols into memory. */
13308 static struct partial_die_info
*
13309 load_partial_dies (const struct die_reader_specs
*reader
,
13310 gdb_byte
*info_ptr
, int building_psymtab
)
13312 struct dwarf2_cu
*cu
= reader
->cu
;
13313 struct objfile
*objfile
= cu
->objfile
;
13314 struct partial_die_info
*part_die
;
13315 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
13316 struct abbrev_info
*abbrev
;
13317 unsigned int bytes_read
;
13318 unsigned int load_all
= 0;
13319 int nesting_level
= 1;
13324 gdb_assert (cu
->per_cu
!= NULL
);
13325 if (cu
->per_cu
->load_all_dies
)
13329 = htab_create_alloc_ex (cu
->header
.length
/ 12,
13333 &cu
->comp_unit_obstack
,
13334 hashtab_obstack_allocate
,
13335 dummy_obstack_deallocate
);
13337 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
13338 sizeof (struct partial_die_info
));
13342 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
13344 /* A NULL abbrev means the end of a series of children. */
13345 if (abbrev
== NULL
)
13347 if (--nesting_level
== 0)
13349 /* PART_DIE was probably the last thing allocated on the
13350 comp_unit_obstack, so we could call obstack_free
13351 here. We don't do that because the waste is small,
13352 and will be cleaned up when we're done with this
13353 compilation unit. This way, we're also more robust
13354 against other users of the comp_unit_obstack. */
13357 info_ptr
+= bytes_read
;
13358 last_die
= parent_die
;
13359 parent_die
= parent_die
->die_parent
;
13363 /* Check for template arguments. We never save these; if
13364 they're seen, we just mark the parent, and go on our way. */
13365 if (parent_die
!= NULL
13366 && cu
->language
== language_cplus
13367 && (abbrev
->tag
== DW_TAG_template_type_param
13368 || abbrev
->tag
== DW_TAG_template_value_param
))
13370 parent_die
->has_template_arguments
= 1;
13374 /* We don't need a partial DIE for the template argument. */
13375 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
13380 /* We only recurse into c++ subprograms looking for template arguments.
13381 Skip their other children. */
13383 && cu
->language
== language_cplus
13384 && parent_die
!= NULL
13385 && parent_die
->tag
== DW_TAG_subprogram
)
13387 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
13391 /* Check whether this DIE is interesting enough to save. Normally
13392 we would not be interested in members here, but there may be
13393 later variables referencing them via DW_AT_specification (for
13394 static members). */
13396 && !is_type_tag_for_partial (abbrev
->tag
)
13397 && abbrev
->tag
!= DW_TAG_constant
13398 && abbrev
->tag
!= DW_TAG_enumerator
13399 && abbrev
->tag
!= DW_TAG_subprogram
13400 && abbrev
->tag
!= DW_TAG_lexical_block
13401 && abbrev
->tag
!= DW_TAG_variable
13402 && abbrev
->tag
!= DW_TAG_namespace
13403 && abbrev
->tag
!= DW_TAG_module
13404 && abbrev
->tag
!= DW_TAG_member
13405 && abbrev
->tag
!= DW_TAG_imported_unit
)
13407 /* Otherwise we skip to the next sibling, if any. */
13408 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
13412 info_ptr
= read_partial_die (reader
, part_die
, abbrev
, bytes_read
,
13415 /* This two-pass algorithm for processing partial symbols has a
13416 high cost in cache pressure. Thus, handle some simple cases
13417 here which cover the majority of C partial symbols. DIEs
13418 which neither have specification tags in them, nor could have
13419 specification tags elsewhere pointing at them, can simply be
13420 processed and discarded.
13422 This segment is also optional; scan_partial_symbols and
13423 add_partial_symbol will handle these DIEs if we chain
13424 them in normally. When compilers which do not emit large
13425 quantities of duplicate debug information are more common,
13426 this code can probably be removed. */
13428 /* Any complete simple types at the top level (pretty much all
13429 of them, for a language without namespaces), can be processed
13431 if (parent_die
== NULL
13432 && part_die
->has_specification
== 0
13433 && part_die
->is_declaration
== 0
13434 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
13435 || part_die
->tag
== DW_TAG_base_type
13436 || part_die
->tag
== DW_TAG_subrange_type
))
13438 if (building_psymtab
&& part_die
->name
!= NULL
)
13439 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
13440 VAR_DOMAIN
, LOC_TYPEDEF
,
13441 &objfile
->static_psymbols
,
13442 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
13443 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
13447 /* The exception for DW_TAG_typedef with has_children above is
13448 a workaround of GCC PR debug/47510. In the case of this complaint
13449 type_name_no_tag_or_error will error on such types later.
13451 GDB skipped children of DW_TAG_typedef by the shortcut above and then
13452 it could not find the child DIEs referenced later, this is checked
13453 above. In correct DWARF DW_TAG_typedef should have no children. */
13455 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
13456 complaint (&symfile_complaints
,
13457 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
13458 "- DIE at 0x%x [in module %s]"),
13459 part_die
->offset
.sect_off
, objfile
->name
);
13461 /* If we're at the second level, and we're an enumerator, and
13462 our parent has no specification (meaning possibly lives in a
13463 namespace elsewhere), then we can add the partial symbol now
13464 instead of queueing it. */
13465 if (part_die
->tag
== DW_TAG_enumerator
13466 && parent_die
!= NULL
13467 && parent_die
->die_parent
== NULL
13468 && parent_die
->tag
== DW_TAG_enumeration_type
13469 && parent_die
->has_specification
== 0)
13471 if (part_die
->name
== NULL
)
13472 complaint (&symfile_complaints
,
13473 _("malformed enumerator DIE ignored"));
13474 else if (building_psymtab
)
13475 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
13476 VAR_DOMAIN
, LOC_CONST
,
13477 (cu
->language
== language_cplus
13478 || cu
->language
== language_java
)
13479 ? &objfile
->global_psymbols
13480 : &objfile
->static_psymbols
,
13481 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
13483 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
13487 /* We'll save this DIE so link it in. */
13488 part_die
->die_parent
= parent_die
;
13489 part_die
->die_sibling
= NULL
;
13490 part_die
->die_child
= NULL
;
13492 if (last_die
&& last_die
== parent_die
)
13493 last_die
->die_child
= part_die
;
13495 last_die
->die_sibling
= part_die
;
13497 last_die
= part_die
;
13499 if (first_die
== NULL
)
13500 first_die
= part_die
;
13502 /* Maybe add the DIE to the hash table. Not all DIEs that we
13503 find interesting need to be in the hash table, because we
13504 also have the parent/sibling/child chains; only those that we
13505 might refer to by offset later during partial symbol reading.
13507 For now this means things that might have be the target of a
13508 DW_AT_specification, DW_AT_abstract_origin, or
13509 DW_AT_extension. DW_AT_extension will refer only to
13510 namespaces; DW_AT_abstract_origin refers to functions (and
13511 many things under the function DIE, but we do not recurse
13512 into function DIEs during partial symbol reading) and
13513 possibly variables as well; DW_AT_specification refers to
13514 declarations. Declarations ought to have the DW_AT_declaration
13515 flag. It happens that GCC forgets to put it in sometimes, but
13516 only for functions, not for types.
13518 Adding more things than necessary to the hash table is harmless
13519 except for the performance cost. Adding too few will result in
13520 wasted time in find_partial_die, when we reread the compilation
13521 unit with load_all_dies set. */
13524 || abbrev
->tag
== DW_TAG_constant
13525 || abbrev
->tag
== DW_TAG_subprogram
13526 || abbrev
->tag
== DW_TAG_variable
13527 || abbrev
->tag
== DW_TAG_namespace
13528 || part_die
->is_declaration
)
13532 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
13533 part_die
->offset
.sect_off
, INSERT
);
13537 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
13538 sizeof (struct partial_die_info
));
13540 /* For some DIEs we want to follow their children (if any). For C
13541 we have no reason to follow the children of structures; for other
13542 languages we have to, so that we can get at method physnames
13543 to infer fully qualified class names, for DW_AT_specification,
13544 and for C++ template arguments. For C++, we also look one level
13545 inside functions to find template arguments (if the name of the
13546 function does not already contain the template arguments).
13548 For Ada, we need to scan the children of subprograms and lexical
13549 blocks as well because Ada allows the definition of nested
13550 entities that could be interesting for the debugger, such as
13551 nested subprograms for instance. */
13552 if (last_die
->has_children
13554 || last_die
->tag
== DW_TAG_namespace
13555 || last_die
->tag
== DW_TAG_module
13556 || last_die
->tag
== DW_TAG_enumeration_type
13557 || (cu
->language
== language_cplus
13558 && last_die
->tag
== DW_TAG_subprogram
13559 && (last_die
->name
== NULL
13560 || strchr (last_die
->name
, '<') == NULL
))
13561 || (cu
->language
!= language_c
13562 && (last_die
->tag
== DW_TAG_class_type
13563 || last_die
->tag
== DW_TAG_interface_type
13564 || last_die
->tag
== DW_TAG_structure_type
13565 || last_die
->tag
== DW_TAG_union_type
))
13566 || (cu
->language
== language_ada
13567 && (last_die
->tag
== DW_TAG_subprogram
13568 || last_die
->tag
== DW_TAG_lexical_block
))))
13571 parent_die
= last_die
;
13575 /* Otherwise we skip to the next sibling, if any. */
13576 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
13578 /* Back to the top, do it again. */
13582 /* Read a minimal amount of information into the minimal die structure. */
13585 read_partial_die (const struct die_reader_specs
*reader
,
13586 struct partial_die_info
*part_die
,
13587 struct abbrev_info
*abbrev
, unsigned int abbrev_len
,
13588 gdb_byte
*info_ptr
)
13590 struct dwarf2_cu
*cu
= reader
->cu
;
13591 struct objfile
*objfile
= cu
->objfile
;
13592 gdb_byte
*buffer
= reader
->buffer
;
13594 struct attribute attr
;
13595 int has_low_pc_attr
= 0;
13596 int has_high_pc_attr
= 0;
13597 int high_pc_relative
= 0;
13599 memset (part_die
, 0, sizeof (struct partial_die_info
));
13601 part_die
->offset
.sect_off
= info_ptr
- buffer
;
13603 info_ptr
+= abbrev_len
;
13605 if (abbrev
== NULL
)
13608 part_die
->tag
= abbrev
->tag
;
13609 part_die
->has_children
= abbrev
->has_children
;
13611 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
13613 info_ptr
= read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
13615 /* Store the data if it is of an attribute we want to keep in a
13616 partial symbol table. */
13620 switch (part_die
->tag
)
13622 case DW_TAG_compile_unit
:
13623 case DW_TAG_partial_unit
:
13624 case DW_TAG_type_unit
:
13625 /* Compilation units have a DW_AT_name that is a filename, not
13626 a source language identifier. */
13627 case DW_TAG_enumeration_type
:
13628 case DW_TAG_enumerator
:
13629 /* These tags always have simple identifiers already; no need
13630 to canonicalize them. */
13631 part_die
->name
= DW_STRING (&attr
);
13635 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
13636 &objfile
->objfile_obstack
);
13640 case DW_AT_linkage_name
:
13641 case DW_AT_MIPS_linkage_name
:
13642 /* Note that both forms of linkage name might appear. We
13643 assume they will be the same, and we only store the last
13645 if (cu
->language
== language_ada
)
13646 part_die
->name
= DW_STRING (&attr
);
13647 part_die
->linkage_name
= DW_STRING (&attr
);
13650 has_low_pc_attr
= 1;
13651 part_die
->lowpc
= DW_ADDR (&attr
);
13653 case DW_AT_high_pc
:
13654 has_high_pc_attr
= 1;
13655 if (attr
.form
== DW_FORM_addr
13656 || attr
.form
== DW_FORM_GNU_addr_index
)
13657 part_die
->highpc
= DW_ADDR (&attr
);
13660 high_pc_relative
= 1;
13661 part_die
->highpc
= DW_UNSND (&attr
);
13664 case DW_AT_location
:
13665 /* Support the .debug_loc offsets. */
13666 if (attr_form_is_block (&attr
))
13668 part_die
->d
.locdesc
= DW_BLOCK (&attr
);
13670 else if (attr_form_is_section_offset (&attr
))
13672 dwarf2_complex_location_expr_complaint ();
13676 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
13677 "partial symbol information");
13680 case DW_AT_external
:
13681 part_die
->is_external
= DW_UNSND (&attr
);
13683 case DW_AT_declaration
:
13684 part_die
->is_declaration
= DW_UNSND (&attr
);
13687 part_die
->has_type
= 1;
13689 case DW_AT_abstract_origin
:
13690 case DW_AT_specification
:
13691 case DW_AT_extension
:
13692 part_die
->has_specification
= 1;
13693 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
13694 part_die
->spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
13695 || cu
->per_cu
->is_dwz
);
13697 case DW_AT_sibling
:
13698 /* Ignore absolute siblings, they might point outside of
13699 the current compile unit. */
13700 if (attr
.form
== DW_FORM_ref_addr
)
13701 complaint (&symfile_complaints
,
13702 _("ignoring absolute DW_AT_sibling"));
13704 part_die
->sibling
= buffer
+ dwarf2_get_ref_die_offset (&attr
).sect_off
;
13706 case DW_AT_byte_size
:
13707 part_die
->has_byte_size
= 1;
13709 case DW_AT_calling_convention
:
13710 /* DWARF doesn't provide a way to identify a program's source-level
13711 entry point. DW_AT_calling_convention attributes are only meant
13712 to describe functions' calling conventions.
13714 However, because it's a necessary piece of information in
13715 Fortran, and because DW_CC_program is the only piece of debugging
13716 information whose definition refers to a 'main program' at all,
13717 several compilers have begun marking Fortran main programs with
13718 DW_CC_program --- even when those functions use the standard
13719 calling conventions.
13721 So until DWARF specifies a way to provide this information and
13722 compilers pick up the new representation, we'll support this
13724 if (DW_UNSND (&attr
) == DW_CC_program
13725 && cu
->language
== language_fortran
)
13727 set_main_name (part_die
->name
);
13729 /* As this DIE has a static linkage the name would be difficult
13730 to look up later. */
13731 language_of_main
= language_fortran
;
13735 if (DW_UNSND (&attr
) == DW_INL_inlined
13736 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
13737 part_die
->may_be_inlined
= 1;
13741 if (part_die
->tag
== DW_TAG_imported_unit
)
13743 part_die
->d
.offset
= dwarf2_get_ref_die_offset (&attr
);
13744 part_die
->is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
13745 || cu
->per_cu
->is_dwz
);
13754 if (high_pc_relative
)
13755 part_die
->highpc
+= part_die
->lowpc
;
13757 if (has_low_pc_attr
&& has_high_pc_attr
)
13759 /* When using the GNU linker, .gnu.linkonce. sections are used to
13760 eliminate duplicate copies of functions and vtables and such.
13761 The linker will arbitrarily choose one and discard the others.
13762 The AT_*_pc values for such functions refer to local labels in
13763 these sections. If the section from that file was discarded, the
13764 labels are not in the output, so the relocs get a value of 0.
13765 If this is a discarded function, mark the pc bounds as invalid,
13766 so that GDB will ignore it. */
13767 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
13769 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13771 complaint (&symfile_complaints
,
13772 _("DW_AT_low_pc %s is zero "
13773 "for DIE at 0x%x [in module %s]"),
13774 paddress (gdbarch
, part_die
->lowpc
),
13775 part_die
->offset
.sect_off
, objfile
->name
);
13777 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
13778 else if (part_die
->lowpc
>= part_die
->highpc
)
13780 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13782 complaint (&symfile_complaints
,
13783 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
13784 "for DIE at 0x%x [in module %s]"),
13785 paddress (gdbarch
, part_die
->lowpc
),
13786 paddress (gdbarch
, part_die
->highpc
),
13787 part_die
->offset
.sect_off
, objfile
->name
);
13790 part_die
->has_pc_info
= 1;
13796 /* Find a cached partial DIE at OFFSET in CU. */
13798 static struct partial_die_info
*
13799 find_partial_die_in_comp_unit (sect_offset offset
, struct dwarf2_cu
*cu
)
13801 struct partial_die_info
*lookup_die
= NULL
;
13802 struct partial_die_info part_die
;
13804 part_die
.offset
= offset
;
13805 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
,
13811 /* Find a partial DIE at OFFSET, which may or may not be in CU,
13812 except in the case of .debug_types DIEs which do not reference
13813 outside their CU (they do however referencing other types via
13814 DW_FORM_ref_sig8). */
13816 static struct partial_die_info
*
13817 find_partial_die (sect_offset offset
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
13819 struct objfile
*objfile
= cu
->objfile
;
13820 struct dwarf2_per_cu_data
*per_cu
= NULL
;
13821 struct partial_die_info
*pd
= NULL
;
13823 if (offset_in_dwz
== cu
->per_cu
->is_dwz
13824 && offset_in_cu_p (&cu
->header
, offset
))
13826 pd
= find_partial_die_in_comp_unit (offset
, cu
);
13829 /* We missed recording what we needed.
13830 Load all dies and try again. */
13831 per_cu
= cu
->per_cu
;
13835 /* TUs don't reference other CUs/TUs (except via type signatures). */
13836 if (cu
->per_cu
->is_debug_types
)
13838 error (_("Dwarf Error: Type Unit at offset 0x%lx contains"
13839 " external reference to offset 0x%lx [in module %s].\n"),
13840 (long) cu
->header
.offset
.sect_off
, (long) offset
.sect_off
,
13841 bfd_get_filename (objfile
->obfd
));
13843 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
13846 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
13847 load_partial_comp_unit (per_cu
);
13849 per_cu
->cu
->last_used
= 0;
13850 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
13853 /* If we didn't find it, and not all dies have been loaded,
13854 load them all and try again. */
13856 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
13858 per_cu
->load_all_dies
= 1;
13860 /* This is nasty. When we reread the DIEs, somewhere up the call chain
13861 THIS_CU->cu may already be in use. So we can't just free it and
13862 replace its DIEs with the ones we read in. Instead, we leave those
13863 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
13864 and clobber THIS_CU->cu->partial_dies with the hash table for the new
13866 load_partial_comp_unit (per_cu
);
13868 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
13872 internal_error (__FILE__
, __LINE__
,
13873 _("could not find partial DIE 0x%x "
13874 "in cache [from module %s]\n"),
13875 offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
13879 /* See if we can figure out if the class lives in a namespace. We do
13880 this by looking for a member function; its demangled name will
13881 contain namespace info, if there is any. */
13884 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
13885 struct dwarf2_cu
*cu
)
13887 /* NOTE: carlton/2003-10-07: Getting the info this way changes
13888 what template types look like, because the demangler
13889 frequently doesn't give the same name as the debug info. We
13890 could fix this by only using the demangled name to get the
13891 prefix (but see comment in read_structure_type). */
13893 struct partial_die_info
*real_pdi
;
13894 struct partial_die_info
*child_pdi
;
13896 /* If this DIE (this DIE's specification, if any) has a parent, then
13897 we should not do this. We'll prepend the parent's fully qualified
13898 name when we create the partial symbol. */
13900 real_pdi
= struct_pdi
;
13901 while (real_pdi
->has_specification
)
13902 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
13903 real_pdi
->spec_is_dwz
, cu
);
13905 if (real_pdi
->die_parent
!= NULL
)
13908 for (child_pdi
= struct_pdi
->die_child
;
13910 child_pdi
= child_pdi
->die_sibling
)
13912 if (child_pdi
->tag
== DW_TAG_subprogram
13913 && child_pdi
->linkage_name
!= NULL
)
13915 char *actual_class_name
13916 = language_class_name_from_physname (cu
->language_defn
,
13917 child_pdi
->linkage_name
);
13918 if (actual_class_name
!= NULL
)
13921 = obstack_copy0 (&cu
->objfile
->objfile_obstack
,
13923 strlen (actual_class_name
));
13924 xfree (actual_class_name
);
13931 /* Adjust PART_DIE before generating a symbol for it. This function
13932 may set the is_external flag or change the DIE's name. */
13935 fixup_partial_die (struct partial_die_info
*part_die
,
13936 struct dwarf2_cu
*cu
)
13938 /* Once we've fixed up a die, there's no point in doing so again.
13939 This also avoids a memory leak if we were to call
13940 guess_partial_die_structure_name multiple times. */
13941 if (part_die
->fixup_called
)
13944 /* If we found a reference attribute and the DIE has no name, try
13945 to find a name in the referred to DIE. */
13947 if (part_die
->name
== NULL
&& part_die
->has_specification
)
13949 struct partial_die_info
*spec_die
;
13951 spec_die
= find_partial_die (part_die
->spec_offset
,
13952 part_die
->spec_is_dwz
, cu
);
13954 fixup_partial_die (spec_die
, cu
);
13956 if (spec_die
->name
)
13958 part_die
->name
= spec_die
->name
;
13960 /* Copy DW_AT_external attribute if it is set. */
13961 if (spec_die
->is_external
)
13962 part_die
->is_external
= spec_die
->is_external
;
13966 /* Set default names for some unnamed DIEs. */
13968 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
13969 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
13971 /* If there is no parent die to provide a namespace, and there are
13972 children, see if we can determine the namespace from their linkage
13974 if (cu
->language
== language_cplus
13975 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
13976 && part_die
->die_parent
== NULL
13977 && part_die
->has_children
13978 && (part_die
->tag
== DW_TAG_class_type
13979 || part_die
->tag
== DW_TAG_structure_type
13980 || part_die
->tag
== DW_TAG_union_type
))
13981 guess_partial_die_structure_name (part_die
, cu
);
13983 /* GCC might emit a nameless struct or union that has a linkage
13984 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
13985 if (part_die
->name
== NULL
13986 && (part_die
->tag
== DW_TAG_class_type
13987 || part_die
->tag
== DW_TAG_interface_type
13988 || part_die
->tag
== DW_TAG_structure_type
13989 || part_die
->tag
== DW_TAG_union_type
)
13990 && part_die
->linkage_name
!= NULL
)
13994 demangled
= cplus_demangle (part_die
->linkage_name
, DMGL_TYPES
);
13999 /* Strip any leading namespaces/classes, keep only the base name.
14000 DW_AT_name for named DIEs does not contain the prefixes. */
14001 base
= strrchr (demangled
, ':');
14002 if (base
&& base
> demangled
&& base
[-1] == ':')
14007 part_die
->name
= obstack_copy0 (&cu
->objfile
->objfile_obstack
,
14008 base
, strlen (base
));
14013 part_die
->fixup_called
= 1;
14016 /* Read an attribute value described by an attribute form. */
14019 read_attribute_value (const struct die_reader_specs
*reader
,
14020 struct attribute
*attr
, unsigned form
,
14021 gdb_byte
*info_ptr
)
14023 struct dwarf2_cu
*cu
= reader
->cu
;
14024 bfd
*abfd
= reader
->abfd
;
14025 struct comp_unit_head
*cu_header
= &cu
->header
;
14026 unsigned int bytes_read
;
14027 struct dwarf_block
*blk
;
14032 case DW_FORM_ref_addr
:
14033 if (cu
->header
.version
== 2)
14034 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
14036 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
14037 &cu
->header
, &bytes_read
);
14038 info_ptr
+= bytes_read
;
14040 case DW_FORM_GNU_ref_alt
:
14041 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
14042 info_ptr
+= bytes_read
;
14045 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
14046 info_ptr
+= bytes_read
;
14048 case DW_FORM_block2
:
14049 blk
= dwarf_alloc_block (cu
);
14050 blk
->size
= read_2_bytes (abfd
, info_ptr
);
14052 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
14053 info_ptr
+= blk
->size
;
14054 DW_BLOCK (attr
) = blk
;
14056 case DW_FORM_block4
:
14057 blk
= dwarf_alloc_block (cu
);
14058 blk
->size
= read_4_bytes (abfd
, info_ptr
);
14060 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
14061 info_ptr
+= blk
->size
;
14062 DW_BLOCK (attr
) = blk
;
14064 case DW_FORM_data2
:
14065 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
14068 case DW_FORM_data4
:
14069 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
14072 case DW_FORM_data8
:
14073 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
14076 case DW_FORM_sec_offset
:
14077 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
14078 info_ptr
+= bytes_read
;
14080 case DW_FORM_string
:
14081 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
14082 DW_STRING_IS_CANONICAL (attr
) = 0;
14083 info_ptr
+= bytes_read
;
14086 if (!cu
->per_cu
->is_dwz
)
14088 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
14090 DW_STRING_IS_CANONICAL (attr
) = 0;
14091 info_ptr
+= bytes_read
;
14095 case DW_FORM_GNU_strp_alt
:
14097 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
14098 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
14101 DW_STRING (attr
) = read_indirect_string_from_dwz (dwz
, str_offset
);
14102 DW_STRING_IS_CANONICAL (attr
) = 0;
14103 info_ptr
+= bytes_read
;
14106 case DW_FORM_exprloc
:
14107 case DW_FORM_block
:
14108 blk
= dwarf_alloc_block (cu
);
14109 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
14110 info_ptr
+= bytes_read
;
14111 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
14112 info_ptr
+= blk
->size
;
14113 DW_BLOCK (attr
) = blk
;
14115 case DW_FORM_block1
:
14116 blk
= dwarf_alloc_block (cu
);
14117 blk
->size
= read_1_byte (abfd
, info_ptr
);
14119 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
14120 info_ptr
+= blk
->size
;
14121 DW_BLOCK (attr
) = blk
;
14123 case DW_FORM_data1
:
14124 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
14128 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
14131 case DW_FORM_flag_present
:
14132 DW_UNSND (attr
) = 1;
14134 case DW_FORM_sdata
:
14135 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
14136 info_ptr
+= bytes_read
;
14138 case DW_FORM_udata
:
14139 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
14140 info_ptr
+= bytes_read
;
14143 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
14144 + read_1_byte (abfd
, info_ptr
));
14148 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
14149 + read_2_bytes (abfd
, info_ptr
));
14153 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
14154 + read_4_bytes (abfd
, info_ptr
));
14158 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
14159 + read_8_bytes (abfd
, info_ptr
));
14162 case DW_FORM_ref_sig8
:
14163 /* Convert the signature to something we can record in DW_UNSND
14165 NOTE: This is NULL if the type wasn't found. */
14166 DW_SIGNATURED_TYPE (attr
) =
14167 lookup_signatured_type (read_8_bytes (abfd
, info_ptr
));
14170 case DW_FORM_ref_udata
:
14171 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
14172 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
14173 info_ptr
+= bytes_read
;
14175 case DW_FORM_indirect
:
14176 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
14177 info_ptr
+= bytes_read
;
14178 info_ptr
= read_attribute_value (reader
, attr
, form
, info_ptr
);
14180 case DW_FORM_GNU_addr_index
:
14181 if (reader
->dwo_file
== NULL
)
14183 /* For now flag a hard error.
14184 Later we can turn this into a complaint. */
14185 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
14186 dwarf_form_name (form
),
14187 bfd_get_filename (abfd
));
14189 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
14190 info_ptr
+= bytes_read
;
14192 case DW_FORM_GNU_str_index
:
14193 if (reader
->dwo_file
== NULL
)
14195 /* For now flag a hard error.
14196 Later we can turn this into a complaint if warranted. */
14197 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
14198 dwarf_form_name (form
),
14199 bfd_get_filename (abfd
));
14202 ULONGEST str_index
=
14203 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
14205 DW_STRING (attr
) = read_str_index (reader
, cu
, str_index
);
14206 DW_STRING_IS_CANONICAL (attr
) = 0;
14207 info_ptr
+= bytes_read
;
14211 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
14212 dwarf_form_name (form
),
14213 bfd_get_filename (abfd
));
14217 if (cu
->per_cu
->is_dwz
&& is_ref_attr (attr
))
14218 attr
->form
= DW_FORM_GNU_ref_alt
;
14220 /* We have seen instances where the compiler tried to emit a byte
14221 size attribute of -1 which ended up being encoded as an unsigned
14222 0xffffffff. Although 0xffffffff is technically a valid size value,
14223 an object of this size seems pretty unlikely so we can relatively
14224 safely treat these cases as if the size attribute was invalid and
14225 treat them as zero by default. */
14226 if (attr
->name
== DW_AT_byte_size
14227 && form
== DW_FORM_data4
14228 && DW_UNSND (attr
) >= 0xffffffff)
14231 (&symfile_complaints
,
14232 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
14233 hex_string (DW_UNSND (attr
)));
14234 DW_UNSND (attr
) = 0;
14240 /* Read an attribute described by an abbreviated attribute. */
14243 read_attribute (const struct die_reader_specs
*reader
,
14244 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
14245 gdb_byte
*info_ptr
)
14247 attr
->name
= abbrev
->name
;
14248 return read_attribute_value (reader
, attr
, abbrev
->form
, info_ptr
);
14251 /* Read dwarf information from a buffer. */
14253 static unsigned int
14254 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
14256 return bfd_get_8 (abfd
, buf
);
14260 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
14262 return bfd_get_signed_8 (abfd
, buf
);
14265 static unsigned int
14266 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
14268 return bfd_get_16 (abfd
, buf
);
14272 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
14274 return bfd_get_signed_16 (abfd
, buf
);
14277 static unsigned int
14278 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
14280 return bfd_get_32 (abfd
, buf
);
14284 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
14286 return bfd_get_signed_32 (abfd
, buf
);
14290 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
14292 return bfd_get_64 (abfd
, buf
);
14296 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
14297 unsigned int *bytes_read
)
14299 struct comp_unit_head
*cu_header
= &cu
->header
;
14300 CORE_ADDR retval
= 0;
14302 if (cu_header
->signed_addr_p
)
14304 switch (cu_header
->addr_size
)
14307 retval
= bfd_get_signed_16 (abfd
, buf
);
14310 retval
= bfd_get_signed_32 (abfd
, buf
);
14313 retval
= bfd_get_signed_64 (abfd
, buf
);
14316 internal_error (__FILE__
, __LINE__
,
14317 _("read_address: bad switch, signed [in module %s]"),
14318 bfd_get_filename (abfd
));
14323 switch (cu_header
->addr_size
)
14326 retval
= bfd_get_16 (abfd
, buf
);
14329 retval
= bfd_get_32 (abfd
, buf
);
14332 retval
= bfd_get_64 (abfd
, buf
);
14335 internal_error (__FILE__
, __LINE__
,
14336 _("read_address: bad switch, "
14337 "unsigned [in module %s]"),
14338 bfd_get_filename (abfd
));
14342 *bytes_read
= cu_header
->addr_size
;
14346 /* Read the initial length from a section. The (draft) DWARF 3
14347 specification allows the initial length to take up either 4 bytes
14348 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
14349 bytes describe the length and all offsets will be 8 bytes in length
14352 An older, non-standard 64-bit format is also handled by this
14353 function. The older format in question stores the initial length
14354 as an 8-byte quantity without an escape value. Lengths greater
14355 than 2^32 aren't very common which means that the initial 4 bytes
14356 is almost always zero. Since a length value of zero doesn't make
14357 sense for the 32-bit format, this initial zero can be considered to
14358 be an escape value which indicates the presence of the older 64-bit
14359 format. As written, the code can't detect (old format) lengths
14360 greater than 4GB. If it becomes necessary to handle lengths
14361 somewhat larger than 4GB, we could allow other small values (such
14362 as the non-sensical values of 1, 2, and 3) to also be used as
14363 escape values indicating the presence of the old format.
14365 The value returned via bytes_read should be used to increment the
14366 relevant pointer after calling read_initial_length().
14368 [ Note: read_initial_length() and read_offset() are based on the
14369 document entitled "DWARF Debugging Information Format", revision
14370 3, draft 8, dated November 19, 2001. This document was obtained
14373 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
14375 This document is only a draft and is subject to change. (So beware.)
14377 Details regarding the older, non-standard 64-bit format were
14378 determined empirically by examining 64-bit ELF files produced by
14379 the SGI toolchain on an IRIX 6.5 machine.
14381 - Kevin, July 16, 2002
14385 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read
)
14387 LONGEST length
= bfd_get_32 (abfd
, buf
);
14389 if (length
== 0xffffffff)
14391 length
= bfd_get_64 (abfd
, buf
+ 4);
14394 else if (length
== 0)
14396 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
14397 length
= bfd_get_64 (abfd
, buf
);
14408 /* Cover function for read_initial_length.
14409 Returns the length of the object at BUF, and stores the size of the
14410 initial length in *BYTES_READ and stores the size that offsets will be in
14412 If the initial length size is not equivalent to that specified in
14413 CU_HEADER then issue a complaint.
14414 This is useful when reading non-comp-unit headers. */
14417 read_checked_initial_length_and_offset (bfd
*abfd
, gdb_byte
*buf
,
14418 const struct comp_unit_head
*cu_header
,
14419 unsigned int *bytes_read
,
14420 unsigned int *offset_size
)
14422 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
14424 gdb_assert (cu_header
->initial_length_size
== 4
14425 || cu_header
->initial_length_size
== 8
14426 || cu_header
->initial_length_size
== 12);
14428 if (cu_header
->initial_length_size
!= *bytes_read
)
14429 complaint (&symfile_complaints
,
14430 _("intermixed 32-bit and 64-bit DWARF sections"));
14432 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
14436 /* Read an offset from the data stream. The size of the offset is
14437 given by cu_header->offset_size. */
14440 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
14441 unsigned int *bytes_read
)
14443 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
14445 *bytes_read
= cu_header
->offset_size
;
14449 /* Read an offset from the data stream. */
14452 read_offset_1 (bfd
*abfd
, gdb_byte
*buf
, unsigned int offset_size
)
14454 LONGEST retval
= 0;
14456 switch (offset_size
)
14459 retval
= bfd_get_32 (abfd
, buf
);
14462 retval
= bfd_get_64 (abfd
, buf
);
14465 internal_error (__FILE__
, __LINE__
,
14466 _("read_offset_1: bad switch [in module %s]"),
14467 bfd_get_filename (abfd
));
14474 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
14476 /* If the size of a host char is 8 bits, we can return a pointer
14477 to the buffer, otherwise we have to copy the data to a buffer
14478 allocated on the temporary obstack. */
14479 gdb_assert (HOST_CHAR_BIT
== 8);
14484 read_direct_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
14486 /* If the size of a host char is 8 bits, we can return a pointer
14487 to the string, otherwise we have to copy the string to a buffer
14488 allocated on the temporary obstack. */
14489 gdb_assert (HOST_CHAR_BIT
== 8);
14492 *bytes_read_ptr
= 1;
14495 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
14496 return (char *) buf
;
14500 read_indirect_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
14502 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
14503 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
14504 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
14505 bfd_get_filename (abfd
));
14506 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
14507 error (_("DW_FORM_strp pointing outside of "
14508 ".debug_str section [in module %s]"),
14509 bfd_get_filename (abfd
));
14510 gdb_assert (HOST_CHAR_BIT
== 8);
14511 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
14513 return (char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
14516 /* Read a string at offset STR_OFFSET in the .debug_str section from
14517 the .dwz file DWZ. Throw an error if the offset is too large. If
14518 the string consists of a single NUL byte, return NULL; otherwise
14519 return a pointer to the string. */
14522 read_indirect_string_from_dwz (struct dwz_file
*dwz
, LONGEST str_offset
)
14524 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwz
->str
);
14526 if (dwz
->str
.buffer
== NULL
)
14527 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
14528 "section [in module %s]"),
14529 bfd_get_filename (dwz
->dwz_bfd
));
14530 if (str_offset
>= dwz
->str
.size
)
14531 error (_("DW_FORM_GNU_strp_alt pointing outside of "
14532 ".debug_str section [in module %s]"),
14533 bfd_get_filename (dwz
->dwz_bfd
));
14534 gdb_assert (HOST_CHAR_BIT
== 8);
14535 if (dwz
->str
.buffer
[str_offset
] == '\0')
14537 return (char *) (dwz
->str
.buffer
+ str_offset
);
14541 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
14542 const struct comp_unit_head
*cu_header
,
14543 unsigned int *bytes_read_ptr
)
14545 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
14547 return read_indirect_string_at_offset (abfd
, str_offset
);
14551 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
14554 unsigned int num_read
;
14556 unsigned char byte
;
14564 byte
= bfd_get_8 (abfd
, buf
);
14567 result
|= ((ULONGEST
) (byte
& 127) << shift
);
14568 if ((byte
& 128) == 0)
14574 *bytes_read_ptr
= num_read
;
14579 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
14582 int i
, shift
, num_read
;
14583 unsigned char byte
;
14591 byte
= bfd_get_8 (abfd
, buf
);
14594 result
|= ((LONGEST
) (byte
& 127) << shift
);
14596 if ((byte
& 128) == 0)
14601 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
14602 result
|= -(((LONGEST
) 1) << shift
);
14603 *bytes_read_ptr
= num_read
;
14607 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
14608 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
14609 ADDR_SIZE is the size of addresses from the CU header. */
14612 read_addr_index_1 (unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
14614 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14615 bfd
*abfd
= objfile
->obfd
;
14616 const gdb_byte
*info_ptr
;
14618 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
14619 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
14620 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
14622 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
14623 error (_("DW_FORM_addr_index pointing outside of "
14624 ".debug_addr section [in module %s]"),
14626 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
14627 + addr_base
+ addr_index
* addr_size
);
14628 if (addr_size
== 4)
14629 return bfd_get_32 (abfd
, info_ptr
);
14631 return bfd_get_64 (abfd
, info_ptr
);
14634 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
14637 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
14639 return read_addr_index_1 (addr_index
, cu
->addr_base
, cu
->header
.addr_size
);
14642 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
14645 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, gdb_byte
*info_ptr
,
14646 unsigned int *bytes_read
)
14648 bfd
*abfd
= cu
->objfile
->obfd
;
14649 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
14651 return read_addr_index (cu
, addr_index
);
14654 /* Data structure to pass results from dwarf2_read_addr_index_reader
14655 back to dwarf2_read_addr_index. */
14657 struct dwarf2_read_addr_index_data
14659 ULONGEST addr_base
;
14663 /* die_reader_func for dwarf2_read_addr_index. */
14666 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
14667 gdb_byte
*info_ptr
,
14668 struct die_info
*comp_unit_die
,
14672 struct dwarf2_cu
*cu
= reader
->cu
;
14673 struct dwarf2_read_addr_index_data
*aidata
=
14674 (struct dwarf2_read_addr_index_data
*) data
;
14676 aidata
->addr_base
= cu
->addr_base
;
14677 aidata
->addr_size
= cu
->header
.addr_size
;
14680 /* Given an index in .debug_addr, fetch the value.
14681 NOTE: This can be called during dwarf expression evaluation,
14682 long after the debug information has been read, and thus per_cu->cu
14683 may no longer exist. */
14686 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
14687 unsigned int addr_index
)
14689 struct objfile
*objfile
= per_cu
->objfile
;
14690 struct dwarf2_cu
*cu
= per_cu
->cu
;
14691 ULONGEST addr_base
;
14694 /* This is intended to be called from outside this file. */
14695 dw2_setup (objfile
);
14697 /* We need addr_base and addr_size.
14698 If we don't have PER_CU->cu, we have to get it.
14699 Nasty, but the alternative is storing the needed info in PER_CU,
14700 which at this point doesn't seem justified: it's not clear how frequently
14701 it would get used and it would increase the size of every PER_CU.
14702 Entry points like dwarf2_per_cu_addr_size do a similar thing
14703 so we're not in uncharted territory here.
14704 Alas we need to be a bit more complicated as addr_base is contained
14707 We don't need to read the entire CU(/TU).
14708 We just need the header and top level die.
14710 IWBN to use the aging mechanism to let us lazily later discard the CU.
14711 For now we skip this optimization. */
14715 addr_base
= cu
->addr_base
;
14716 addr_size
= cu
->header
.addr_size
;
14720 struct dwarf2_read_addr_index_data aidata
;
14722 /* Note: We can't use init_cutu_and_read_dies_simple here,
14723 we need addr_base. */
14724 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
14725 dwarf2_read_addr_index_reader
, &aidata
);
14726 addr_base
= aidata
.addr_base
;
14727 addr_size
= aidata
.addr_size
;
14730 return read_addr_index_1 (addr_index
, addr_base
, addr_size
);
14733 /* Given a DW_AT_str_index, fetch the string. */
14736 read_str_index (const struct die_reader_specs
*reader
,
14737 struct dwarf2_cu
*cu
, ULONGEST str_index
)
14739 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14740 const char *dwo_name
= objfile
->name
;
14741 bfd
*abfd
= objfile
->obfd
;
14742 struct dwo_sections
*sections
= &reader
->dwo_file
->sections
;
14743 gdb_byte
*info_ptr
;
14744 ULONGEST str_offset
;
14746 dwarf2_read_section (objfile
, §ions
->str
);
14747 dwarf2_read_section (objfile
, §ions
->str_offsets
);
14748 if (sections
->str
.buffer
== NULL
)
14749 error (_("DW_FORM_str_index used without .debug_str.dwo section"
14750 " in CU at offset 0x%lx [in module %s]"),
14751 (long) cu
->header
.offset
.sect_off
, dwo_name
);
14752 if (sections
->str_offsets
.buffer
== NULL
)
14753 error (_("DW_FORM_str_index used without .debug_str_offsets.dwo section"
14754 " in CU at offset 0x%lx [in module %s]"),
14755 (long) cu
->header
.offset
.sect_off
, dwo_name
);
14756 if (str_index
* cu
->header
.offset_size
>= sections
->str_offsets
.size
)
14757 error (_("DW_FORM_str_index pointing outside of .debug_str_offsets.dwo"
14758 " section in CU at offset 0x%lx [in module %s]"),
14759 (long) cu
->header
.offset
.sect_off
, dwo_name
);
14760 info_ptr
= (sections
->str_offsets
.buffer
14761 + str_index
* cu
->header
.offset_size
);
14762 if (cu
->header
.offset_size
== 4)
14763 str_offset
= bfd_get_32 (abfd
, info_ptr
);
14765 str_offset
= bfd_get_64 (abfd
, info_ptr
);
14766 if (str_offset
>= sections
->str
.size
)
14767 error (_("Offset from DW_FORM_str_index pointing outside of"
14768 " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"),
14769 (long) cu
->header
.offset
.sect_off
, dwo_name
);
14770 return (char *) (sections
->str
.buffer
+ str_offset
);
14773 /* Return the length of an LEB128 number in BUF. */
14776 leb128_size (const gdb_byte
*buf
)
14778 const gdb_byte
*begin
= buf
;
14784 if ((byte
& 128) == 0)
14785 return buf
- begin
;
14790 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
14797 cu
->language
= language_c
;
14799 case DW_LANG_C_plus_plus
:
14800 cu
->language
= language_cplus
;
14803 cu
->language
= language_d
;
14805 case DW_LANG_Fortran77
:
14806 case DW_LANG_Fortran90
:
14807 case DW_LANG_Fortran95
:
14808 cu
->language
= language_fortran
;
14811 cu
->language
= language_go
;
14813 case DW_LANG_Mips_Assembler
:
14814 cu
->language
= language_asm
;
14817 cu
->language
= language_java
;
14819 case DW_LANG_Ada83
:
14820 case DW_LANG_Ada95
:
14821 cu
->language
= language_ada
;
14823 case DW_LANG_Modula2
:
14824 cu
->language
= language_m2
;
14826 case DW_LANG_Pascal83
:
14827 cu
->language
= language_pascal
;
14830 cu
->language
= language_objc
;
14832 case DW_LANG_Cobol74
:
14833 case DW_LANG_Cobol85
:
14835 cu
->language
= language_minimal
;
14838 cu
->language_defn
= language_def (cu
->language
);
14841 /* Return the named attribute or NULL if not there. */
14843 static struct attribute
*
14844 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
14849 struct attribute
*spec
= NULL
;
14851 for (i
= 0; i
< die
->num_attrs
; ++i
)
14853 if (die
->attrs
[i
].name
== name
)
14854 return &die
->attrs
[i
];
14855 if (die
->attrs
[i
].name
== DW_AT_specification
14856 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
14857 spec
= &die
->attrs
[i
];
14863 die
= follow_die_ref (die
, spec
, &cu
);
14869 /* Return the named attribute or NULL if not there,
14870 but do not follow DW_AT_specification, etc.
14871 This is for use in contexts where we're reading .debug_types dies.
14872 Following DW_AT_specification, DW_AT_abstract_origin will take us
14873 back up the chain, and we want to go down. */
14875 static struct attribute
*
14876 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
14880 for (i
= 0; i
< die
->num_attrs
; ++i
)
14881 if (die
->attrs
[i
].name
== name
)
14882 return &die
->attrs
[i
];
14887 /* Return non-zero iff the attribute NAME is defined for the given DIE,
14888 and holds a non-zero value. This function should only be used for
14889 DW_FORM_flag or DW_FORM_flag_present attributes. */
14892 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
14894 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
14896 return (attr
&& DW_UNSND (attr
));
14900 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
14902 /* A DIE is a declaration if it has a DW_AT_declaration attribute
14903 which value is non-zero. However, we have to be careful with
14904 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
14905 (via dwarf2_flag_true_p) follows this attribute. So we may
14906 end up accidently finding a declaration attribute that belongs
14907 to a different DIE referenced by the specification attribute,
14908 even though the given DIE does not have a declaration attribute. */
14909 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
14910 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
14913 /* Return the die giving the specification for DIE, if there is
14914 one. *SPEC_CU is the CU containing DIE on input, and the CU
14915 containing the return value on output. If there is no
14916 specification, but there is an abstract origin, that is
14919 static struct die_info
*
14920 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
14922 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
14925 if (spec_attr
== NULL
)
14926 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
14928 if (spec_attr
== NULL
)
14931 return follow_die_ref (die
, spec_attr
, spec_cu
);
14934 /* Free the line_header structure *LH, and any arrays and strings it
14936 NOTE: This is also used as a "cleanup" function. */
14939 free_line_header (struct line_header
*lh
)
14941 if (lh
->standard_opcode_lengths
)
14942 xfree (lh
->standard_opcode_lengths
);
14944 /* Remember that all the lh->file_names[i].name pointers are
14945 pointers into debug_line_buffer, and don't need to be freed. */
14946 if (lh
->file_names
)
14947 xfree (lh
->file_names
);
14949 /* Similarly for the include directory names. */
14950 if (lh
->include_dirs
)
14951 xfree (lh
->include_dirs
);
14956 /* Add an entry to LH's include directory table. */
14959 add_include_dir (struct line_header
*lh
, char *include_dir
)
14961 /* Grow the array if necessary. */
14962 if (lh
->include_dirs_size
== 0)
14964 lh
->include_dirs_size
= 1; /* for testing */
14965 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
14966 * sizeof (*lh
->include_dirs
));
14968 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
14970 lh
->include_dirs_size
*= 2;
14971 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
14972 (lh
->include_dirs_size
14973 * sizeof (*lh
->include_dirs
)));
14976 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
14979 /* Add an entry to LH's file name table. */
14982 add_file_name (struct line_header
*lh
,
14984 unsigned int dir_index
,
14985 unsigned int mod_time
,
14986 unsigned int length
)
14988 struct file_entry
*fe
;
14990 /* Grow the array if necessary. */
14991 if (lh
->file_names_size
== 0)
14993 lh
->file_names_size
= 1; /* for testing */
14994 lh
->file_names
= xmalloc (lh
->file_names_size
14995 * sizeof (*lh
->file_names
));
14997 else if (lh
->num_file_names
>= lh
->file_names_size
)
14999 lh
->file_names_size
*= 2;
15000 lh
->file_names
= xrealloc (lh
->file_names
,
15001 (lh
->file_names_size
15002 * sizeof (*lh
->file_names
)));
15005 fe
= &lh
->file_names
[lh
->num_file_names
++];
15007 fe
->dir_index
= dir_index
;
15008 fe
->mod_time
= mod_time
;
15009 fe
->length
= length
;
15010 fe
->included_p
= 0;
15014 /* A convenience function to find the proper .debug_line section for a
15017 static struct dwarf2_section_info
*
15018 get_debug_line_section (struct dwarf2_cu
*cu
)
15020 struct dwarf2_section_info
*section
;
15022 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
15024 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
15025 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
15026 else if (cu
->per_cu
->is_dwz
)
15028 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
15030 section
= &dwz
->line
;
15033 section
= &dwarf2_per_objfile
->line
;
15038 /* Read the statement program header starting at OFFSET in
15039 .debug_line, or .debug_line.dwo. Return a pointer
15040 to a struct line_header, allocated using xmalloc.
15042 NOTE: the strings in the include directory and file name tables of
15043 the returned object point into the dwarf line section buffer,
15044 and must not be freed. */
15046 static struct line_header
*
15047 dwarf_decode_line_header (unsigned int offset
, struct dwarf2_cu
*cu
)
15049 struct cleanup
*back_to
;
15050 struct line_header
*lh
;
15051 gdb_byte
*line_ptr
;
15052 unsigned int bytes_read
, offset_size
;
15054 char *cur_dir
, *cur_file
;
15055 struct dwarf2_section_info
*section
;
15058 section
= get_debug_line_section (cu
);
15059 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
15060 if (section
->buffer
== NULL
)
15062 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
15063 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
15065 complaint (&symfile_complaints
, _("missing .debug_line section"));
15069 /* We can't do this until we know the section is non-empty.
15070 Only then do we know we have such a section. */
15071 abfd
= section
->asection
->owner
;
15073 /* Make sure that at least there's room for the total_length field.
15074 That could be 12 bytes long, but we're just going to fudge that. */
15075 if (offset
+ 4 >= section
->size
)
15077 dwarf2_statement_list_fits_in_line_number_section_complaint ();
15081 lh
= xmalloc (sizeof (*lh
));
15082 memset (lh
, 0, sizeof (*lh
));
15083 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
15086 line_ptr
= section
->buffer
+ offset
;
15088 /* Read in the header. */
15090 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
15091 &bytes_read
, &offset_size
);
15092 line_ptr
+= bytes_read
;
15093 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
15095 dwarf2_statement_list_fits_in_line_number_section_complaint ();
15098 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
15099 lh
->version
= read_2_bytes (abfd
, line_ptr
);
15101 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
15102 line_ptr
+= offset_size
;
15103 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
15105 if (lh
->version
>= 4)
15107 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
15111 lh
->maximum_ops_per_instruction
= 1;
15113 if (lh
->maximum_ops_per_instruction
== 0)
15115 lh
->maximum_ops_per_instruction
= 1;
15116 complaint (&symfile_complaints
,
15117 _("invalid maximum_ops_per_instruction "
15118 "in `.debug_line' section"));
15121 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
15123 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
15125 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
15127 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
15129 lh
->standard_opcode_lengths
15130 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
15132 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
15133 for (i
= 1; i
< lh
->opcode_base
; ++i
)
15135 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
15139 /* Read directory table. */
15140 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
15142 line_ptr
+= bytes_read
;
15143 add_include_dir (lh
, cur_dir
);
15145 line_ptr
+= bytes_read
;
15147 /* Read file name table. */
15148 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
15150 unsigned int dir_index
, mod_time
, length
;
15152 line_ptr
+= bytes_read
;
15153 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15154 line_ptr
+= bytes_read
;
15155 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15156 line_ptr
+= bytes_read
;
15157 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15158 line_ptr
+= bytes_read
;
15160 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
15162 line_ptr
+= bytes_read
;
15163 lh
->statement_program_start
= line_ptr
;
15165 if (line_ptr
> (section
->buffer
+ section
->size
))
15166 complaint (&symfile_complaints
,
15167 _("line number info header doesn't "
15168 "fit in `.debug_line' section"));
15170 discard_cleanups (back_to
);
15174 /* Subroutine of dwarf_decode_lines to simplify it.
15175 Return the file name of the psymtab for included file FILE_INDEX
15176 in line header LH of PST.
15177 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
15178 If space for the result is malloc'd, it will be freed by a cleanup.
15179 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename.
15181 The function creates dangling cleanup registration. */
15184 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
15185 const struct partial_symtab
*pst
,
15186 const char *comp_dir
)
15188 const struct file_entry fe
= lh
->file_names
[file_index
];
15189 char *include_name
= fe
.name
;
15190 char *include_name_to_compare
= include_name
;
15191 char *dir_name
= NULL
;
15192 const char *pst_filename
;
15193 char *copied_name
= NULL
;
15197 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
15199 if (!IS_ABSOLUTE_PATH (include_name
)
15200 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
15202 /* Avoid creating a duplicate psymtab for PST.
15203 We do this by comparing INCLUDE_NAME and PST_FILENAME.
15204 Before we do the comparison, however, we need to account
15205 for DIR_NAME and COMP_DIR.
15206 First prepend dir_name (if non-NULL). If we still don't
15207 have an absolute path prepend comp_dir (if non-NULL).
15208 However, the directory we record in the include-file's
15209 psymtab does not contain COMP_DIR (to match the
15210 corresponding symtab(s)).
15215 bash$ gcc -g ./hello.c
15216 include_name = "hello.c"
15218 DW_AT_comp_dir = comp_dir = "/tmp"
15219 DW_AT_name = "./hello.c" */
15221 if (dir_name
!= NULL
)
15223 include_name
= concat (dir_name
, SLASH_STRING
,
15224 include_name
, (char *)NULL
);
15225 include_name_to_compare
= include_name
;
15226 make_cleanup (xfree
, include_name
);
15228 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
15230 include_name_to_compare
= concat (comp_dir
, SLASH_STRING
,
15231 include_name
, (char *)NULL
);
15235 pst_filename
= pst
->filename
;
15236 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
15238 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
15239 pst_filename
, (char *)NULL
);
15240 pst_filename
= copied_name
;
15243 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
15245 if (include_name_to_compare
!= include_name
)
15246 xfree (include_name_to_compare
);
15247 if (copied_name
!= NULL
)
15248 xfree (copied_name
);
15252 return include_name
;
15255 /* Ignore this record_line request. */
15258 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
15263 /* Subroutine of dwarf_decode_lines to simplify it.
15264 Process the line number information in LH. */
15267 dwarf_decode_lines_1 (struct line_header
*lh
, const char *comp_dir
,
15268 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
15270 gdb_byte
*line_ptr
, *extended_end
;
15271 gdb_byte
*line_end
;
15272 unsigned int bytes_read
, extended_len
;
15273 unsigned char op_code
, extended_op
, adj_opcode
;
15274 CORE_ADDR baseaddr
;
15275 struct objfile
*objfile
= cu
->objfile
;
15276 bfd
*abfd
= objfile
->obfd
;
15277 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15278 const int decode_for_pst_p
= (pst
!= NULL
);
15279 struct subfile
*last_subfile
= NULL
;
15280 void (*p_record_line
) (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
15283 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
15285 line_ptr
= lh
->statement_program_start
;
15286 line_end
= lh
->statement_program_end
;
15288 /* Read the statement sequences until there's nothing left. */
15289 while (line_ptr
< line_end
)
15291 /* state machine registers */
15292 CORE_ADDR address
= 0;
15293 unsigned int file
= 1;
15294 unsigned int line
= 1;
15295 unsigned int column
= 0;
15296 int is_stmt
= lh
->default_is_stmt
;
15297 int basic_block
= 0;
15298 int end_sequence
= 0;
15300 unsigned char op_index
= 0;
15302 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
15304 /* Start a subfile for the current file of the state machine. */
15305 /* lh->include_dirs and lh->file_names are 0-based, but the
15306 directory and file name numbers in the statement program
15308 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
15312 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
15314 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
15317 /* Decode the table. */
15318 while (!end_sequence
)
15320 op_code
= read_1_byte (abfd
, line_ptr
);
15322 if (line_ptr
> line_end
)
15324 dwarf2_debug_line_missing_end_sequence_complaint ();
15328 if (op_code
>= lh
->opcode_base
)
15330 /* Special operand. */
15331 adj_opcode
= op_code
- lh
->opcode_base
;
15332 address
+= (((op_index
+ (adj_opcode
/ lh
->line_range
))
15333 / lh
->maximum_ops_per_instruction
)
15334 * lh
->minimum_instruction_length
);
15335 op_index
= ((op_index
+ (adj_opcode
/ lh
->line_range
))
15336 % lh
->maximum_ops_per_instruction
);
15337 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
15338 if (lh
->num_file_names
< file
|| file
== 0)
15339 dwarf2_debug_line_missing_file_complaint ();
15340 /* For now we ignore lines not starting on an
15341 instruction boundary. */
15342 else if (op_index
== 0)
15344 lh
->file_names
[file
- 1].included_p
= 1;
15345 if (!decode_for_pst_p
&& is_stmt
)
15347 if (last_subfile
!= current_subfile
)
15349 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
15351 (*p_record_line
) (last_subfile
, 0, addr
);
15352 last_subfile
= current_subfile
;
15354 /* Append row to matrix using current values. */
15355 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
15356 (*p_record_line
) (current_subfile
, line
, addr
);
15361 else switch (op_code
)
15363 case DW_LNS_extended_op
:
15364 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
15366 line_ptr
+= bytes_read
;
15367 extended_end
= line_ptr
+ extended_len
;
15368 extended_op
= read_1_byte (abfd
, line_ptr
);
15370 switch (extended_op
)
15372 case DW_LNE_end_sequence
:
15373 p_record_line
= record_line
;
15376 case DW_LNE_set_address
:
15377 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
15379 if (address
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
15381 /* This line table is for a function which has been
15382 GCd by the linker. Ignore it. PR gdb/12528 */
15385 = line_ptr
- get_debug_line_section (cu
)->buffer
;
15387 complaint (&symfile_complaints
,
15388 _(".debug_line address at offset 0x%lx is 0 "
15390 line_offset
, objfile
->name
);
15391 p_record_line
= noop_record_line
;
15395 line_ptr
+= bytes_read
;
15396 address
+= baseaddr
;
15398 case DW_LNE_define_file
:
15401 unsigned int dir_index
, mod_time
, length
;
15403 cur_file
= read_direct_string (abfd
, line_ptr
,
15405 line_ptr
+= bytes_read
;
15407 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15408 line_ptr
+= bytes_read
;
15410 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15411 line_ptr
+= bytes_read
;
15413 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15414 line_ptr
+= bytes_read
;
15415 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
15418 case DW_LNE_set_discriminator
:
15419 /* The discriminator is not interesting to the debugger;
15421 line_ptr
= extended_end
;
15424 complaint (&symfile_complaints
,
15425 _("mangled .debug_line section"));
15428 /* Make sure that we parsed the extended op correctly. If e.g.
15429 we expected a different address size than the producer used,
15430 we may have read the wrong number of bytes. */
15431 if (line_ptr
!= extended_end
)
15433 complaint (&symfile_complaints
,
15434 _("mangled .debug_line section"));
15439 if (lh
->num_file_names
< file
|| file
== 0)
15440 dwarf2_debug_line_missing_file_complaint ();
15443 lh
->file_names
[file
- 1].included_p
= 1;
15444 if (!decode_for_pst_p
&& is_stmt
)
15446 if (last_subfile
!= current_subfile
)
15448 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
15450 (*p_record_line
) (last_subfile
, 0, addr
);
15451 last_subfile
= current_subfile
;
15453 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
15454 (*p_record_line
) (current_subfile
, line
, addr
);
15459 case DW_LNS_advance_pc
:
15462 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15464 address
+= (((op_index
+ adjust
)
15465 / lh
->maximum_ops_per_instruction
)
15466 * lh
->minimum_instruction_length
);
15467 op_index
= ((op_index
+ adjust
)
15468 % lh
->maximum_ops_per_instruction
);
15469 line_ptr
+= bytes_read
;
15472 case DW_LNS_advance_line
:
15473 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
15474 line_ptr
+= bytes_read
;
15476 case DW_LNS_set_file
:
15478 /* The arrays lh->include_dirs and lh->file_names are
15479 0-based, but the directory and file name numbers in
15480 the statement program are 1-based. */
15481 struct file_entry
*fe
;
15484 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15485 line_ptr
+= bytes_read
;
15486 if (lh
->num_file_names
< file
|| file
== 0)
15487 dwarf2_debug_line_missing_file_complaint ();
15490 fe
= &lh
->file_names
[file
- 1];
15492 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
15493 if (!decode_for_pst_p
)
15495 last_subfile
= current_subfile
;
15496 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
15501 case DW_LNS_set_column
:
15502 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15503 line_ptr
+= bytes_read
;
15505 case DW_LNS_negate_stmt
:
15506 is_stmt
= (!is_stmt
);
15508 case DW_LNS_set_basic_block
:
15511 /* Add to the address register of the state machine the
15512 address increment value corresponding to special opcode
15513 255. I.e., this value is scaled by the minimum
15514 instruction length since special opcode 255 would have
15515 scaled the increment. */
15516 case DW_LNS_const_add_pc
:
15518 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
15520 address
+= (((op_index
+ adjust
)
15521 / lh
->maximum_ops_per_instruction
)
15522 * lh
->minimum_instruction_length
);
15523 op_index
= ((op_index
+ adjust
)
15524 % lh
->maximum_ops_per_instruction
);
15527 case DW_LNS_fixed_advance_pc
:
15528 address
+= read_2_bytes (abfd
, line_ptr
);
15534 /* Unknown standard opcode, ignore it. */
15537 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
15539 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15540 line_ptr
+= bytes_read
;
15545 if (lh
->num_file_names
< file
|| file
== 0)
15546 dwarf2_debug_line_missing_file_complaint ();
15549 lh
->file_names
[file
- 1].included_p
= 1;
15550 if (!decode_for_pst_p
)
15552 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
15553 (*p_record_line
) (current_subfile
, 0, addr
);
15559 /* Decode the Line Number Program (LNP) for the given line_header
15560 structure and CU. The actual information extracted and the type
15561 of structures created from the LNP depends on the value of PST.
15563 1. If PST is NULL, then this procedure uses the data from the program
15564 to create all necessary symbol tables, and their linetables.
15566 2. If PST is not NULL, this procedure reads the program to determine
15567 the list of files included by the unit represented by PST, and
15568 builds all the associated partial symbol tables.
15570 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
15571 It is used for relative paths in the line table.
15572 NOTE: When processing partial symtabs (pst != NULL),
15573 comp_dir == pst->dirname.
15575 NOTE: It is important that psymtabs have the same file name (via strcmp)
15576 as the corresponding symtab. Since COMP_DIR is not used in the name of the
15577 symtab we don't use it in the name of the psymtabs we create.
15578 E.g. expand_line_sal requires this when finding psymtabs to expand.
15579 A good testcase for this is mb-inline.exp. */
15582 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
15583 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
15584 int want_line_info
)
15586 struct objfile
*objfile
= cu
->objfile
;
15587 const int decode_for_pst_p
= (pst
!= NULL
);
15588 struct subfile
*first_subfile
= current_subfile
;
15590 if (want_line_info
)
15591 dwarf_decode_lines_1 (lh
, comp_dir
, cu
, pst
);
15593 if (decode_for_pst_p
)
15597 /* Now that we're done scanning the Line Header Program, we can
15598 create the psymtab of each included file. */
15599 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
15600 if (lh
->file_names
[file_index
].included_p
== 1)
15602 char *include_name
=
15603 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
15604 if (include_name
!= NULL
)
15605 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
15610 /* Make sure a symtab is created for every file, even files
15611 which contain only variables (i.e. no code with associated
15615 for (i
= 0; i
< lh
->num_file_names
; i
++)
15618 struct file_entry
*fe
;
15620 fe
= &lh
->file_names
[i
];
15622 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
15623 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
15625 /* Skip the main file; we don't need it, and it must be
15626 allocated last, so that it will show up before the
15627 non-primary symtabs in the objfile's symtab list. */
15628 if (current_subfile
== first_subfile
)
15631 if (current_subfile
->symtab
== NULL
)
15632 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
15634 fe
->symtab
= current_subfile
->symtab
;
15639 /* Start a subfile for DWARF. FILENAME is the name of the file and
15640 DIRNAME the name of the source directory which contains FILENAME
15641 or NULL if not known. COMP_DIR is the compilation directory for the
15642 linetable's compilation unit or NULL if not known.
15643 This routine tries to keep line numbers from identical absolute and
15644 relative file names in a common subfile.
15646 Using the `list' example from the GDB testsuite, which resides in
15647 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
15648 of /srcdir/list0.c yields the following debugging information for list0.c:
15650 DW_AT_name: /srcdir/list0.c
15651 DW_AT_comp_dir: /compdir
15652 files.files[0].name: list0.h
15653 files.files[0].dir: /srcdir
15654 files.files[1].name: list0.c
15655 files.files[1].dir: /srcdir
15657 The line number information for list0.c has to end up in a single
15658 subfile, so that `break /srcdir/list0.c:1' works as expected.
15659 start_subfile will ensure that this happens provided that we pass the
15660 concatenation of files.files[1].dir and files.files[1].name as the
15664 dwarf2_start_subfile (char *filename
, const char *dirname
,
15665 const char *comp_dir
)
15669 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
15670 `start_symtab' will always pass the contents of DW_AT_comp_dir as
15671 second argument to start_subfile. To be consistent, we do the
15672 same here. In order not to lose the line information directory,
15673 we concatenate it to the filename when it makes sense.
15674 Note that the Dwarf3 standard says (speaking of filenames in line
15675 information): ``The directory index is ignored for file names
15676 that represent full path names''. Thus ignoring dirname in the
15677 `else' branch below isn't an issue. */
15679 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
15680 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
15682 fullname
= filename
;
15684 start_subfile (fullname
, comp_dir
);
15686 if (fullname
!= filename
)
15690 /* Start a symtab for DWARF.
15691 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
15694 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
15695 const char *name
, const char *comp_dir
, CORE_ADDR low_pc
)
15697 start_symtab (name
, comp_dir
, low_pc
);
15698 record_debugformat ("DWARF 2");
15699 record_producer (cu
->producer
);
15701 /* We assume that we're processing GCC output. */
15702 processing_gcc_compilation
= 2;
15704 cu
->processing_has_namespace_info
= 0;
15708 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
15709 struct dwarf2_cu
*cu
)
15711 struct objfile
*objfile
= cu
->objfile
;
15712 struct comp_unit_head
*cu_header
= &cu
->header
;
15714 /* NOTE drow/2003-01-30: There used to be a comment and some special
15715 code here to turn a symbol with DW_AT_external and a
15716 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
15717 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
15718 with some versions of binutils) where shared libraries could have
15719 relocations against symbols in their debug information - the
15720 minimal symbol would have the right address, but the debug info
15721 would not. It's no longer necessary, because we will explicitly
15722 apply relocations when we read in the debug information now. */
15724 /* A DW_AT_location attribute with no contents indicates that a
15725 variable has been optimized away. */
15726 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
15728 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
15732 /* Handle one degenerate form of location expression specially, to
15733 preserve GDB's previous behavior when section offsets are
15734 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
15735 then mark this symbol as LOC_STATIC. */
15737 if (attr_form_is_block (attr
)
15738 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
15739 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
15740 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
15741 && (DW_BLOCK (attr
)->size
15742 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
15744 unsigned int dummy
;
15746 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
15747 SYMBOL_VALUE_ADDRESS (sym
) =
15748 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
15750 SYMBOL_VALUE_ADDRESS (sym
) =
15751 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
15752 SYMBOL_CLASS (sym
) = LOC_STATIC
;
15753 fixup_symbol_section (sym
, objfile
);
15754 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
15755 SYMBOL_SECTION (sym
));
15759 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
15760 expression evaluator, and use LOC_COMPUTED only when necessary
15761 (i.e. when the value of a register or memory location is
15762 referenced, or a thread-local block, etc.). Then again, it might
15763 not be worthwhile. I'm assuming that it isn't unless performance
15764 or memory numbers show me otherwise. */
15766 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
15767 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
15769 if (SYMBOL_COMPUTED_OPS (sym
) == &dwarf2_loclist_funcs
)
15770 cu
->has_loclist
= 1;
15773 /* Given a pointer to a DWARF information entry, figure out if we need
15774 to make a symbol table entry for it, and if so, create a new entry
15775 and return a pointer to it.
15776 If TYPE is NULL, determine symbol type from the die, otherwise
15777 used the passed type.
15778 If SPACE is not NULL, use it to hold the new symbol. If it is
15779 NULL, allocate a new symbol on the objfile's obstack. */
15781 static struct symbol
*
15782 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
15783 struct symbol
*space
)
15785 struct objfile
*objfile
= cu
->objfile
;
15786 struct symbol
*sym
= NULL
;
15788 struct attribute
*attr
= NULL
;
15789 struct attribute
*attr2
= NULL
;
15790 CORE_ADDR baseaddr
;
15791 struct pending
**list_to_add
= NULL
;
15793 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
15795 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
15797 name
= dwarf2_name (die
, cu
);
15800 const char *linkagename
;
15801 int suppress_add
= 0;
15806 sym
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
15807 OBJSTAT (objfile
, n_syms
++);
15809 /* Cache this symbol's name and the name's demangled form (if any). */
15810 SYMBOL_SET_LANGUAGE (sym
, cu
->language
);
15811 linkagename
= dwarf2_physname (name
, die
, cu
);
15812 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
15814 /* Fortran does not have mangling standard and the mangling does differ
15815 between gfortran, iFort etc. */
15816 if (cu
->language
== language_fortran
15817 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
15818 symbol_set_demangled_name (&(sym
->ginfo
),
15819 dwarf2_full_name (name
, die
, cu
),
15822 /* Default assumptions.
15823 Use the passed type or decode it from the die. */
15824 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
15825 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
15827 SYMBOL_TYPE (sym
) = type
;
15829 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
15830 attr
= dwarf2_attr (die
,
15831 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
15835 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
15838 attr
= dwarf2_attr (die
,
15839 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
15843 int file_index
= DW_UNSND (attr
);
15845 if (cu
->line_header
== NULL
15846 || file_index
> cu
->line_header
->num_file_names
)
15847 complaint (&symfile_complaints
,
15848 _("file index out of range"));
15849 else if (file_index
> 0)
15851 struct file_entry
*fe
;
15853 fe
= &cu
->line_header
->file_names
[file_index
- 1];
15854 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
15861 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
15864 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
15866 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
15867 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
15868 SYMBOL_CLASS (sym
) = LOC_LABEL
;
15869 add_symbol_to_list (sym
, cu
->list_in_scope
);
15871 case DW_TAG_subprogram
:
15872 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
15874 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
15875 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
15876 if ((attr2
&& (DW_UNSND (attr2
) != 0))
15877 || cu
->language
== language_ada
)
15879 /* Subprograms marked external are stored as a global symbol.
15880 Ada subprograms, whether marked external or not, are always
15881 stored as a global symbol, because we want to be able to
15882 access them globally. For instance, we want to be able
15883 to break on a nested subprogram without having to
15884 specify the context. */
15885 list_to_add
= &global_symbols
;
15889 list_to_add
= cu
->list_in_scope
;
15892 case DW_TAG_inlined_subroutine
:
15893 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
15895 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
15896 SYMBOL_INLINED (sym
) = 1;
15897 list_to_add
= cu
->list_in_scope
;
15899 case DW_TAG_template_value_param
:
15901 /* Fall through. */
15902 case DW_TAG_constant
:
15903 case DW_TAG_variable
:
15904 case DW_TAG_member
:
15905 /* Compilation with minimal debug info may result in
15906 variables with missing type entries. Change the
15907 misleading `void' type to something sensible. */
15908 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
15910 = objfile_type (objfile
)->nodebug_data_symbol
;
15912 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
15913 /* In the case of DW_TAG_member, we should only be called for
15914 static const members. */
15915 if (die
->tag
== DW_TAG_member
)
15917 /* dwarf2_add_field uses die_is_declaration,
15918 so we do the same. */
15919 gdb_assert (die_is_declaration (die
, cu
));
15924 dwarf2_const_value (attr
, sym
, cu
);
15925 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
15928 if (attr2
&& (DW_UNSND (attr2
) != 0))
15929 list_to_add
= &global_symbols
;
15931 list_to_add
= cu
->list_in_scope
;
15935 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
15938 var_decode_location (attr
, sym
, cu
);
15939 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
15941 /* Fortran explicitly imports any global symbols to the local
15942 scope by DW_TAG_common_block. */
15943 if (cu
->language
== language_fortran
&& die
->parent
15944 && die
->parent
->tag
== DW_TAG_common_block
)
15947 if (SYMBOL_CLASS (sym
) == LOC_STATIC
15948 && SYMBOL_VALUE_ADDRESS (sym
) == 0
15949 && !dwarf2_per_objfile
->has_section_at_zero
)
15951 /* When a static variable is eliminated by the linker,
15952 the corresponding debug information is not stripped
15953 out, but the variable address is set to null;
15954 do not add such variables into symbol table. */
15956 else if (attr2
&& (DW_UNSND (attr2
) != 0))
15958 /* Workaround gfortran PR debug/40040 - it uses
15959 DW_AT_location for variables in -fPIC libraries which may
15960 get overriden by other libraries/executable and get
15961 a different address. Resolve it by the minimal symbol
15962 which may come from inferior's executable using copy
15963 relocation. Make this workaround only for gfortran as for
15964 other compilers GDB cannot guess the minimal symbol
15965 Fortran mangling kind. */
15966 if (cu
->language
== language_fortran
&& die
->parent
15967 && die
->parent
->tag
== DW_TAG_module
15969 && strncmp (cu
->producer
, "GNU Fortran ", 12) == 0)
15970 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
15972 /* A variable with DW_AT_external is never static,
15973 but it may be block-scoped. */
15974 list_to_add
= (cu
->list_in_scope
== &file_symbols
15975 ? &global_symbols
: cu
->list_in_scope
);
15978 list_to_add
= cu
->list_in_scope
;
15982 /* We do not know the address of this symbol.
15983 If it is an external symbol and we have type information
15984 for it, enter the symbol as a LOC_UNRESOLVED symbol.
15985 The address of the variable will then be determined from
15986 the minimal symbol table whenever the variable is
15988 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
15990 /* Fortran explicitly imports any global symbols to the local
15991 scope by DW_TAG_common_block. */
15992 if (cu
->language
== language_fortran
&& die
->parent
15993 && die
->parent
->tag
== DW_TAG_common_block
)
15995 /* SYMBOL_CLASS doesn't matter here because
15996 read_common_block is going to reset it. */
15998 list_to_add
= cu
->list_in_scope
;
16000 else if (attr2
&& (DW_UNSND (attr2
) != 0)
16001 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
16003 /* A variable with DW_AT_external is never static, but it
16004 may be block-scoped. */
16005 list_to_add
= (cu
->list_in_scope
== &file_symbols
16006 ? &global_symbols
: cu
->list_in_scope
);
16008 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
16010 else if (!die_is_declaration (die
, cu
))
16012 /* Use the default LOC_OPTIMIZED_OUT class. */
16013 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
16015 list_to_add
= cu
->list_in_scope
;
16019 case DW_TAG_formal_parameter
:
16020 /* If we are inside a function, mark this as an argument. If
16021 not, we might be looking at an argument to an inlined function
16022 when we do not have enough information to show inlined frames;
16023 pretend it's a local variable in that case so that the user can
16025 if (context_stack_depth
> 0
16026 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
16027 SYMBOL_IS_ARGUMENT (sym
) = 1;
16028 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
16031 var_decode_location (attr
, sym
, cu
);
16033 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
16036 dwarf2_const_value (attr
, sym
, cu
);
16039 list_to_add
= cu
->list_in_scope
;
16041 case DW_TAG_unspecified_parameters
:
16042 /* From varargs functions; gdb doesn't seem to have any
16043 interest in this information, so just ignore it for now.
16046 case DW_TAG_template_type_param
:
16048 /* Fall through. */
16049 case DW_TAG_class_type
:
16050 case DW_TAG_interface_type
:
16051 case DW_TAG_structure_type
:
16052 case DW_TAG_union_type
:
16053 case DW_TAG_set_type
:
16054 case DW_TAG_enumeration_type
:
16055 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
16056 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
16059 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
16060 really ever be static objects: otherwise, if you try
16061 to, say, break of a class's method and you're in a file
16062 which doesn't mention that class, it won't work unless
16063 the check for all static symbols in lookup_symbol_aux
16064 saves you. See the OtherFileClass tests in
16065 gdb.c++/namespace.exp. */
16069 list_to_add
= (cu
->list_in_scope
== &file_symbols
16070 && (cu
->language
== language_cplus
16071 || cu
->language
== language_java
)
16072 ? &global_symbols
: cu
->list_in_scope
);
16074 /* The semantics of C++ state that "struct foo {
16075 ... }" also defines a typedef for "foo". A Java
16076 class declaration also defines a typedef for the
16078 if (cu
->language
== language_cplus
16079 || cu
->language
== language_java
16080 || cu
->language
== language_ada
)
16082 /* The symbol's name is already allocated along
16083 with this objfile, so we don't need to
16084 duplicate it for the type. */
16085 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
16086 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
16091 case DW_TAG_typedef
:
16092 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
16093 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
16094 list_to_add
= cu
->list_in_scope
;
16096 case DW_TAG_base_type
:
16097 case DW_TAG_subrange_type
:
16098 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
16099 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
16100 list_to_add
= cu
->list_in_scope
;
16102 case DW_TAG_enumerator
:
16103 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
16106 dwarf2_const_value (attr
, sym
, cu
);
16109 /* NOTE: carlton/2003-11-10: See comment above in the
16110 DW_TAG_class_type, etc. block. */
16112 list_to_add
= (cu
->list_in_scope
== &file_symbols
16113 && (cu
->language
== language_cplus
16114 || cu
->language
== language_java
)
16115 ? &global_symbols
: cu
->list_in_scope
);
16118 case DW_TAG_namespace
:
16119 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
16120 list_to_add
= &global_symbols
;
16122 case DW_TAG_common_block
:
16123 SYMBOL_CLASS (sym
) = LOC_COMMON_BLOCK
;
16124 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
16125 add_symbol_to_list (sym
, cu
->list_in_scope
);
16128 /* Not a tag we recognize. Hopefully we aren't processing
16129 trash data, but since we must specifically ignore things
16130 we don't recognize, there is nothing else we should do at
16132 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
16133 dwarf_tag_name (die
->tag
));
16139 sym
->hash_next
= objfile
->template_symbols
;
16140 objfile
->template_symbols
= sym
;
16141 list_to_add
= NULL
;
16144 if (list_to_add
!= NULL
)
16145 add_symbol_to_list (sym
, list_to_add
);
16147 /* For the benefit of old versions of GCC, check for anonymous
16148 namespaces based on the demangled name. */
16149 if (!cu
->processing_has_namespace_info
16150 && cu
->language
== language_cplus
)
16151 cp_scan_for_anonymous_namespaces (sym
, objfile
);
16156 /* A wrapper for new_symbol_full that always allocates a new symbol. */
16158 static struct symbol
*
16159 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
16161 return new_symbol_full (die
, type
, cu
, NULL
);
16164 /* Given an attr with a DW_FORM_dataN value in host byte order,
16165 zero-extend it as appropriate for the symbol's type. The DWARF
16166 standard (v4) is not entirely clear about the meaning of using
16167 DW_FORM_dataN for a constant with a signed type, where the type is
16168 wider than the data. The conclusion of a discussion on the DWARF
16169 list was that this is unspecified. We choose to always zero-extend
16170 because that is the interpretation long in use by GCC. */
16173 dwarf2_const_value_data (struct attribute
*attr
, struct type
*type
,
16174 const char *name
, struct obstack
*obstack
,
16175 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
16177 struct objfile
*objfile
= cu
->objfile
;
16178 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
16179 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
16180 LONGEST l
= DW_UNSND (attr
);
16182 if (bits
< sizeof (*value
) * 8)
16184 l
&= ((LONGEST
) 1 << bits
) - 1;
16187 else if (bits
== sizeof (*value
) * 8)
16191 gdb_byte
*bytes
= obstack_alloc (obstack
, bits
/ 8);
16192 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
16199 /* Read a constant value from an attribute. Either set *VALUE, or if
16200 the value does not fit in *VALUE, set *BYTES - either already
16201 allocated on the objfile obstack, or newly allocated on OBSTACK,
16202 or, set *BATON, if we translated the constant to a location
16206 dwarf2_const_value_attr (struct attribute
*attr
, struct type
*type
,
16207 const char *name
, struct obstack
*obstack
,
16208 struct dwarf2_cu
*cu
,
16209 LONGEST
*value
, gdb_byte
**bytes
,
16210 struct dwarf2_locexpr_baton
**baton
)
16212 struct objfile
*objfile
= cu
->objfile
;
16213 struct comp_unit_head
*cu_header
= &cu
->header
;
16214 struct dwarf_block
*blk
;
16215 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
16216 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
16222 switch (attr
->form
)
16225 case DW_FORM_GNU_addr_index
:
16229 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
16230 dwarf2_const_value_length_mismatch_complaint (name
,
16231 cu_header
->addr_size
,
16232 TYPE_LENGTH (type
));
16233 /* Symbols of this form are reasonably rare, so we just
16234 piggyback on the existing location code rather than writing
16235 a new implementation of symbol_computed_ops. */
16236 *baton
= obstack_alloc (&objfile
->objfile_obstack
,
16237 sizeof (struct dwarf2_locexpr_baton
));
16238 (*baton
)->per_cu
= cu
->per_cu
;
16239 gdb_assert ((*baton
)->per_cu
);
16241 (*baton
)->size
= 2 + cu_header
->addr_size
;
16242 data
= obstack_alloc (&objfile
->objfile_obstack
, (*baton
)->size
);
16243 (*baton
)->data
= data
;
16245 data
[0] = DW_OP_addr
;
16246 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
16247 byte_order
, DW_ADDR (attr
));
16248 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
16251 case DW_FORM_string
:
16253 case DW_FORM_GNU_str_index
:
16254 case DW_FORM_GNU_strp_alt
:
16255 /* DW_STRING is already allocated on the objfile obstack, point
16257 *bytes
= (gdb_byte
*) DW_STRING (attr
);
16259 case DW_FORM_block1
:
16260 case DW_FORM_block2
:
16261 case DW_FORM_block4
:
16262 case DW_FORM_block
:
16263 case DW_FORM_exprloc
:
16264 blk
= DW_BLOCK (attr
);
16265 if (TYPE_LENGTH (type
) != blk
->size
)
16266 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
16267 TYPE_LENGTH (type
));
16268 *bytes
= blk
->data
;
16271 /* The DW_AT_const_value attributes are supposed to carry the
16272 symbol's value "represented as it would be on the target
16273 architecture." By the time we get here, it's already been
16274 converted to host endianness, so we just need to sign- or
16275 zero-extend it as appropriate. */
16276 case DW_FORM_data1
:
16277 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
16278 obstack
, cu
, value
, 8);
16280 case DW_FORM_data2
:
16281 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
16282 obstack
, cu
, value
, 16);
16284 case DW_FORM_data4
:
16285 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
16286 obstack
, cu
, value
, 32);
16288 case DW_FORM_data8
:
16289 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
16290 obstack
, cu
, value
, 64);
16293 case DW_FORM_sdata
:
16294 *value
= DW_SND (attr
);
16297 case DW_FORM_udata
:
16298 *value
= DW_UNSND (attr
);
16302 complaint (&symfile_complaints
,
16303 _("unsupported const value attribute form: '%s'"),
16304 dwarf_form_name (attr
->form
));
16311 /* Copy constant value from an attribute to a symbol. */
16314 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
16315 struct dwarf2_cu
*cu
)
16317 struct objfile
*objfile
= cu
->objfile
;
16318 struct comp_unit_head
*cu_header
= &cu
->header
;
16321 struct dwarf2_locexpr_baton
*baton
;
16323 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
16324 SYMBOL_PRINT_NAME (sym
),
16325 &objfile
->objfile_obstack
, cu
,
16326 &value
, &bytes
, &baton
);
16330 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
16331 SYMBOL_LOCATION_BATON (sym
) = baton
;
16332 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
16334 else if (bytes
!= NULL
)
16336 SYMBOL_VALUE_BYTES (sym
) = bytes
;
16337 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
16341 SYMBOL_VALUE (sym
) = value
;
16342 SYMBOL_CLASS (sym
) = LOC_CONST
;
16346 /* Return the type of the die in question using its DW_AT_type attribute. */
16348 static struct type
*
16349 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16351 struct attribute
*type_attr
;
16353 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
16356 /* A missing DW_AT_type represents a void type. */
16357 return objfile_type (cu
->objfile
)->builtin_void
;
16360 return lookup_die_type (die
, type_attr
, cu
);
16363 /* True iff CU's producer generates GNAT Ada auxiliary information
16364 that allows to find parallel types through that information instead
16365 of having to do expensive parallel lookups by type name. */
16368 need_gnat_info (struct dwarf2_cu
*cu
)
16370 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
16371 of GNAT produces this auxiliary information, without any indication
16372 that it is produced. Part of enhancing the FSF version of GNAT
16373 to produce that information will be to put in place an indicator
16374 that we can use in order to determine whether the descriptive type
16375 info is available or not. One suggestion that has been made is
16376 to use a new attribute, attached to the CU die. For now, assume
16377 that the descriptive type info is not available. */
16381 /* Return the auxiliary type of the die in question using its
16382 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
16383 attribute is not present. */
16385 static struct type
*
16386 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16388 struct attribute
*type_attr
;
16390 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
16394 return lookup_die_type (die
, type_attr
, cu
);
16397 /* If DIE has a descriptive_type attribute, then set the TYPE's
16398 descriptive type accordingly. */
16401 set_descriptive_type (struct type
*type
, struct die_info
*die
,
16402 struct dwarf2_cu
*cu
)
16404 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
16406 if (descriptive_type
)
16408 ALLOCATE_GNAT_AUX_TYPE (type
);
16409 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
16413 /* Return the containing type of the die in question using its
16414 DW_AT_containing_type attribute. */
16416 static struct type
*
16417 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16419 struct attribute
*type_attr
;
16421 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
16423 error (_("Dwarf Error: Problem turning containing type into gdb type "
16424 "[in module %s]"), cu
->objfile
->name
);
16426 return lookup_die_type (die
, type_attr
, cu
);
16429 /* Look up the type of DIE in CU using its type attribute ATTR.
16430 If there is no type substitute an error marker. */
16432 static struct type
*
16433 lookup_die_type (struct die_info
*die
, struct attribute
*attr
,
16434 struct dwarf2_cu
*cu
)
16436 struct objfile
*objfile
= cu
->objfile
;
16437 struct type
*this_type
;
16439 /* First see if we have it cached. */
16441 if (attr
->form
== DW_FORM_GNU_ref_alt
)
16443 struct dwarf2_per_cu_data
*per_cu
;
16444 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
16446 per_cu
= dwarf2_find_containing_comp_unit (offset
, 1, cu
->objfile
);
16447 this_type
= get_die_type_at_offset (offset
, per_cu
);
16449 else if (is_ref_attr (attr
))
16451 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
16453 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
16455 else if (attr
->form
== DW_FORM_ref_sig8
)
16457 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
16459 /* sig_type will be NULL if the signatured type is missing from
16461 if (sig_type
== NULL
)
16462 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
16463 "at 0x%x [in module %s]"),
16464 die
->offset
.sect_off
, objfile
->name
);
16466 gdb_assert (sig_type
->per_cu
.is_debug_types
);
16467 /* If we haven't filled in type_offset_in_section yet, then we
16468 haven't read the type in yet. */
16470 if (sig_type
->type_offset_in_section
.sect_off
!= 0)
16473 get_die_type_at_offset (sig_type
->type_offset_in_section
,
16474 &sig_type
->per_cu
);
16479 dump_die_for_error (die
);
16480 error (_("Dwarf Error: Bad type attribute %s [in module %s]"),
16481 dwarf_attr_name (attr
->name
), objfile
->name
);
16484 /* If not cached we need to read it in. */
16486 if (this_type
== NULL
)
16488 struct die_info
*type_die
;
16489 struct dwarf2_cu
*type_cu
= cu
;
16491 type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
16492 /* If we found the type now, it's probably because the type came
16493 from an inter-CU reference and the type's CU got expanded before
16495 this_type
= get_die_type (type_die
, type_cu
);
16496 if (this_type
== NULL
)
16497 this_type
= read_type_die_1 (type_die
, type_cu
);
16500 /* If we still don't have a type use an error marker. */
16502 if (this_type
== NULL
)
16504 char *message
, *saved
;
16506 /* read_type_die already issued a complaint. */
16507 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
16509 cu
->header
.offset
.sect_off
,
16510 die
->offset
.sect_off
);
16511 saved
= obstack_copy0 (&objfile
->objfile_obstack
,
16512 message
, strlen (message
));
16515 this_type
= init_type (TYPE_CODE_ERROR
, 0, 0, saved
, objfile
);
16521 /* Return the type in DIE, CU.
16522 Returns NULL for invalid types.
16524 This first does a lookup in the appropriate type_hash table,
16525 and only reads the die in if necessary.
16527 NOTE: This can be called when reading in partial or full symbols. */
16529 static struct type
*
16530 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
16532 struct type
*this_type
;
16534 this_type
= get_die_type (die
, cu
);
16538 return read_type_die_1 (die
, cu
);
16541 /* Read the type in DIE, CU.
16542 Returns NULL for invalid types. */
16544 static struct type
*
16545 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
16547 struct type
*this_type
= NULL
;
16551 case DW_TAG_class_type
:
16552 case DW_TAG_interface_type
:
16553 case DW_TAG_structure_type
:
16554 case DW_TAG_union_type
:
16555 this_type
= read_structure_type (die
, cu
);
16557 case DW_TAG_enumeration_type
:
16558 this_type
= read_enumeration_type (die
, cu
);
16560 case DW_TAG_subprogram
:
16561 case DW_TAG_subroutine_type
:
16562 case DW_TAG_inlined_subroutine
:
16563 this_type
= read_subroutine_type (die
, cu
);
16565 case DW_TAG_array_type
:
16566 this_type
= read_array_type (die
, cu
);
16568 case DW_TAG_set_type
:
16569 this_type
= read_set_type (die
, cu
);
16571 case DW_TAG_pointer_type
:
16572 this_type
= read_tag_pointer_type (die
, cu
);
16574 case DW_TAG_ptr_to_member_type
:
16575 this_type
= read_tag_ptr_to_member_type (die
, cu
);
16577 case DW_TAG_reference_type
:
16578 this_type
= read_tag_reference_type (die
, cu
);
16580 case DW_TAG_const_type
:
16581 this_type
= read_tag_const_type (die
, cu
);
16583 case DW_TAG_volatile_type
:
16584 this_type
= read_tag_volatile_type (die
, cu
);
16586 case DW_TAG_restrict_type
:
16587 this_type
= read_tag_restrict_type (die
, cu
);
16589 case DW_TAG_string_type
:
16590 this_type
= read_tag_string_type (die
, cu
);
16592 case DW_TAG_typedef
:
16593 this_type
= read_typedef (die
, cu
);
16595 case DW_TAG_subrange_type
:
16596 this_type
= read_subrange_type (die
, cu
);
16598 case DW_TAG_base_type
:
16599 this_type
= read_base_type (die
, cu
);
16601 case DW_TAG_unspecified_type
:
16602 this_type
= read_unspecified_type (die
, cu
);
16604 case DW_TAG_namespace
:
16605 this_type
= read_namespace_type (die
, cu
);
16607 case DW_TAG_module
:
16608 this_type
= read_module_type (die
, cu
);
16611 complaint (&symfile_complaints
,
16612 _("unexpected tag in read_type_die: '%s'"),
16613 dwarf_tag_name (die
->tag
));
16620 /* See if we can figure out if the class lives in a namespace. We do
16621 this by looking for a member function; its demangled name will
16622 contain namespace info, if there is any.
16623 Return the computed name or NULL.
16624 Space for the result is allocated on the objfile's obstack.
16625 This is the full-die version of guess_partial_die_structure_name.
16626 In this case we know DIE has no useful parent. */
16629 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
16631 struct die_info
*spec_die
;
16632 struct dwarf2_cu
*spec_cu
;
16633 struct die_info
*child
;
16636 spec_die
= die_specification (die
, &spec_cu
);
16637 if (spec_die
!= NULL
)
16643 for (child
= die
->child
;
16645 child
= child
->sibling
)
16647 if (child
->tag
== DW_TAG_subprogram
)
16649 struct attribute
*attr
;
16651 attr
= dwarf2_attr (child
, DW_AT_linkage_name
, cu
);
16653 attr
= dwarf2_attr (child
, DW_AT_MIPS_linkage_name
, cu
);
16657 = language_class_name_from_physname (cu
->language_defn
,
16661 if (actual_name
!= NULL
)
16663 const char *die_name
= dwarf2_name (die
, cu
);
16665 if (die_name
!= NULL
16666 && strcmp (die_name
, actual_name
) != 0)
16668 /* Strip off the class name from the full name.
16669 We want the prefix. */
16670 int die_name_len
= strlen (die_name
);
16671 int actual_name_len
= strlen (actual_name
);
16673 /* Test for '::' as a sanity check. */
16674 if (actual_name_len
> die_name_len
+ 2
16675 && actual_name
[actual_name_len
16676 - die_name_len
- 1] == ':')
16678 obstack_copy0 (&cu
->objfile
->objfile_obstack
,
16680 actual_name_len
- die_name_len
- 2);
16683 xfree (actual_name
);
16692 /* GCC might emit a nameless typedef that has a linkage name. Determine the
16693 prefix part in such case. See
16694 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
16697 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
16699 struct attribute
*attr
;
16702 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
16703 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
16706 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
16707 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
16710 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
16712 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
16713 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
16716 /* dwarf2_name had to be already called. */
16717 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
16719 /* Strip the base name, keep any leading namespaces/classes. */
16720 base
= strrchr (DW_STRING (attr
), ':');
16721 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
16724 return obstack_copy0 (&cu
->objfile
->objfile_obstack
,
16725 DW_STRING (attr
), &base
[-1] - DW_STRING (attr
));
16728 /* Return the name of the namespace/class that DIE is defined within,
16729 or "" if we can't tell. The caller should not xfree the result.
16731 For example, if we're within the method foo() in the following
16741 then determine_prefix on foo's die will return "N::C". */
16743 static const char *
16744 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
16746 struct die_info
*parent
, *spec_die
;
16747 struct dwarf2_cu
*spec_cu
;
16748 struct type
*parent_type
;
16751 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
16752 && cu
->language
!= language_fortran
)
16755 retval
= anonymous_struct_prefix (die
, cu
);
16759 /* We have to be careful in the presence of DW_AT_specification.
16760 For example, with GCC 3.4, given the code
16764 // Definition of N::foo.
16768 then we'll have a tree of DIEs like this:
16770 1: DW_TAG_compile_unit
16771 2: DW_TAG_namespace // N
16772 3: DW_TAG_subprogram // declaration of N::foo
16773 4: DW_TAG_subprogram // definition of N::foo
16774 DW_AT_specification // refers to die #3
16776 Thus, when processing die #4, we have to pretend that we're in
16777 the context of its DW_AT_specification, namely the contex of die
16780 spec_die
= die_specification (die
, &spec_cu
);
16781 if (spec_die
== NULL
)
16782 parent
= die
->parent
;
16785 parent
= spec_die
->parent
;
16789 if (parent
== NULL
)
16791 else if (parent
->building_fullname
)
16794 const char *parent_name
;
16796 /* It has been seen on RealView 2.2 built binaries,
16797 DW_TAG_template_type_param types actually _defined_ as
16798 children of the parent class:
16801 template class <class Enum> Class{};
16802 Class<enum E> class_e;
16804 1: DW_TAG_class_type (Class)
16805 2: DW_TAG_enumeration_type (E)
16806 3: DW_TAG_enumerator (enum1:0)
16807 3: DW_TAG_enumerator (enum2:1)
16809 2: DW_TAG_template_type_param
16810 DW_AT_type DW_FORM_ref_udata (E)
16812 Besides being broken debug info, it can put GDB into an
16813 infinite loop. Consider:
16815 When we're building the full name for Class<E>, we'll start
16816 at Class, and go look over its template type parameters,
16817 finding E. We'll then try to build the full name of E, and
16818 reach here. We're now trying to build the full name of E,
16819 and look over the parent DIE for containing scope. In the
16820 broken case, if we followed the parent DIE of E, we'd again
16821 find Class, and once again go look at its template type
16822 arguments, etc., etc. Simply don't consider such parent die
16823 as source-level parent of this die (it can't be, the language
16824 doesn't allow it), and break the loop here. */
16825 name
= dwarf2_name (die
, cu
);
16826 parent_name
= dwarf2_name (parent
, cu
);
16827 complaint (&symfile_complaints
,
16828 _("template param type '%s' defined within parent '%s'"),
16829 name
? name
: "<unknown>",
16830 parent_name
? parent_name
: "<unknown>");
16834 switch (parent
->tag
)
16836 case DW_TAG_namespace
:
16837 parent_type
= read_type_die (parent
, cu
);
16838 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
16839 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
16840 Work around this problem here. */
16841 if (cu
->language
== language_cplus
16842 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
16844 /* We give a name to even anonymous namespaces. */
16845 return TYPE_TAG_NAME (parent_type
);
16846 case DW_TAG_class_type
:
16847 case DW_TAG_interface_type
:
16848 case DW_TAG_structure_type
:
16849 case DW_TAG_union_type
:
16850 case DW_TAG_module
:
16851 parent_type
= read_type_die (parent
, cu
);
16852 if (TYPE_TAG_NAME (parent_type
) != NULL
)
16853 return TYPE_TAG_NAME (parent_type
);
16855 /* An anonymous structure is only allowed non-static data
16856 members; no typedefs, no member functions, et cetera.
16857 So it does not need a prefix. */
16859 case DW_TAG_compile_unit
:
16860 case DW_TAG_partial_unit
:
16861 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
16862 if (cu
->language
== language_cplus
16863 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
16864 && die
->child
!= NULL
16865 && (die
->tag
== DW_TAG_class_type
16866 || die
->tag
== DW_TAG_structure_type
16867 || die
->tag
== DW_TAG_union_type
))
16869 char *name
= guess_full_die_structure_name (die
, cu
);
16875 return determine_prefix (parent
, cu
);
16879 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
16880 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
16881 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
16882 an obconcat, otherwise allocate storage for the result. The CU argument is
16883 used to determine the language and hence, the appropriate separator. */
16885 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
16888 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
16889 int physname
, struct dwarf2_cu
*cu
)
16891 const char *lead
= "";
16894 if (suffix
== NULL
|| suffix
[0] == '\0'
16895 || prefix
== NULL
|| prefix
[0] == '\0')
16897 else if (cu
->language
== language_java
)
16899 else if (cu
->language
== language_fortran
&& physname
)
16901 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
16902 DW_AT_MIPS_linkage_name is preferred and used instead. */
16910 if (prefix
== NULL
)
16912 if (suffix
== NULL
)
16918 = xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
16920 strcpy (retval
, lead
);
16921 strcat (retval
, prefix
);
16922 strcat (retval
, sep
);
16923 strcat (retval
, suffix
);
16928 /* We have an obstack. */
16929 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
16933 /* Return sibling of die, NULL if no sibling. */
16935 static struct die_info
*
16936 sibling_die (struct die_info
*die
)
16938 return die
->sibling
;
16941 /* Get name of a die, return NULL if not found. */
16943 static const char *
16944 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
16945 struct obstack
*obstack
)
16947 if (name
&& cu
->language
== language_cplus
)
16949 char *canon_name
= cp_canonicalize_string (name
);
16951 if (canon_name
!= NULL
)
16953 if (strcmp (canon_name
, name
) != 0)
16954 name
= obstack_copy0 (obstack
, canon_name
, strlen (canon_name
));
16955 xfree (canon_name
);
16962 /* Get name of a die, return NULL if not found. */
16964 static const char *
16965 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
16967 struct attribute
*attr
;
16969 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
16970 if ((!attr
|| !DW_STRING (attr
))
16971 && die
->tag
!= DW_TAG_class_type
16972 && die
->tag
!= DW_TAG_interface_type
16973 && die
->tag
!= DW_TAG_structure_type
16974 && die
->tag
!= DW_TAG_union_type
)
16979 case DW_TAG_compile_unit
:
16980 case DW_TAG_partial_unit
:
16981 /* Compilation units have a DW_AT_name that is a filename, not
16982 a source language identifier. */
16983 case DW_TAG_enumeration_type
:
16984 case DW_TAG_enumerator
:
16985 /* These tags always have simple identifiers already; no need
16986 to canonicalize them. */
16987 return DW_STRING (attr
);
16989 case DW_TAG_subprogram
:
16990 /* Java constructors will all be named "<init>", so return
16991 the class name when we see this special case. */
16992 if (cu
->language
== language_java
16993 && DW_STRING (attr
) != NULL
16994 && strcmp (DW_STRING (attr
), "<init>") == 0)
16996 struct dwarf2_cu
*spec_cu
= cu
;
16997 struct die_info
*spec_die
;
16999 /* GCJ will output '<init>' for Java constructor names.
17000 For this special case, return the name of the parent class. */
17002 /* GCJ may output suprogram DIEs with AT_specification set.
17003 If so, use the name of the specified DIE. */
17004 spec_die
= die_specification (die
, &spec_cu
);
17005 if (spec_die
!= NULL
)
17006 return dwarf2_name (spec_die
, spec_cu
);
17011 if (die
->tag
== DW_TAG_class_type
)
17012 return dwarf2_name (die
, cu
);
17014 while (die
->tag
!= DW_TAG_compile_unit
17015 && die
->tag
!= DW_TAG_partial_unit
);
17019 case DW_TAG_class_type
:
17020 case DW_TAG_interface_type
:
17021 case DW_TAG_structure_type
:
17022 case DW_TAG_union_type
:
17023 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
17024 structures or unions. These were of the form "._%d" in GCC 4.1,
17025 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
17026 and GCC 4.4. We work around this problem by ignoring these. */
17027 if (attr
&& DW_STRING (attr
)
17028 && (strncmp (DW_STRING (attr
), "._", 2) == 0
17029 || strncmp (DW_STRING (attr
), "<anonymous", 10) == 0))
17032 /* GCC might emit a nameless typedef that has a linkage name. See
17033 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
17034 if (!attr
|| DW_STRING (attr
) == NULL
)
17036 char *demangled
= NULL
;
17038 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
17040 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
17042 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
17045 /* Avoid demangling DW_STRING (attr) the second time on a second
17046 call for the same DIE. */
17047 if (!DW_STRING_IS_CANONICAL (attr
))
17048 demangled
= cplus_demangle (DW_STRING (attr
), DMGL_TYPES
);
17054 /* FIXME: we already did this for the partial symbol... */
17055 DW_STRING (attr
) = obstack_copy0 (&cu
->objfile
->objfile_obstack
,
17056 demangled
, strlen (demangled
));
17057 DW_STRING_IS_CANONICAL (attr
) = 1;
17060 /* Strip any leading namespaces/classes, keep only the base name.
17061 DW_AT_name for named DIEs does not contain the prefixes. */
17062 base
= strrchr (DW_STRING (attr
), ':');
17063 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
17066 return DW_STRING (attr
);
17075 if (!DW_STRING_IS_CANONICAL (attr
))
17078 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
17079 &cu
->objfile
->objfile_obstack
);
17080 DW_STRING_IS_CANONICAL (attr
) = 1;
17082 return DW_STRING (attr
);
17085 /* Return the die that this die in an extension of, or NULL if there
17086 is none. *EXT_CU is the CU containing DIE on input, and the CU
17087 containing the return value on output. */
17089 static struct die_info
*
17090 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
17092 struct attribute
*attr
;
17094 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
17098 return follow_die_ref (die
, attr
, ext_cu
);
17101 /* Convert a DIE tag into its string name. */
17103 static const char *
17104 dwarf_tag_name (unsigned tag
)
17106 const char *name
= get_DW_TAG_name (tag
);
17109 return "DW_TAG_<unknown>";
17114 /* Convert a DWARF attribute code into its string name. */
17116 static const char *
17117 dwarf_attr_name (unsigned attr
)
17121 #ifdef MIPS /* collides with DW_AT_HP_block_index */
17122 if (attr
== DW_AT_MIPS_fde
)
17123 return "DW_AT_MIPS_fde";
17125 if (attr
== DW_AT_HP_block_index
)
17126 return "DW_AT_HP_block_index";
17129 name
= get_DW_AT_name (attr
);
17132 return "DW_AT_<unknown>";
17137 /* Convert a DWARF value form code into its string name. */
17139 static const char *
17140 dwarf_form_name (unsigned form
)
17142 const char *name
= get_DW_FORM_name (form
);
17145 return "DW_FORM_<unknown>";
17151 dwarf_bool_name (unsigned mybool
)
17159 /* Convert a DWARF type code into its string name. */
17161 static const char *
17162 dwarf_type_encoding_name (unsigned enc
)
17164 const char *name
= get_DW_ATE_name (enc
);
17167 return "DW_ATE_<unknown>";
17173 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
17177 print_spaces (indent
, f
);
17178 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
17179 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
.sect_off
);
17181 if (die
->parent
!= NULL
)
17183 print_spaces (indent
, f
);
17184 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
17185 die
->parent
->offset
.sect_off
);
17188 print_spaces (indent
, f
);
17189 fprintf_unfiltered (f
, " has children: %s\n",
17190 dwarf_bool_name (die
->child
!= NULL
));
17192 print_spaces (indent
, f
);
17193 fprintf_unfiltered (f
, " attributes:\n");
17195 for (i
= 0; i
< die
->num_attrs
; ++i
)
17197 print_spaces (indent
, f
);
17198 fprintf_unfiltered (f
, " %s (%s) ",
17199 dwarf_attr_name (die
->attrs
[i
].name
),
17200 dwarf_form_name (die
->attrs
[i
].form
));
17202 switch (die
->attrs
[i
].form
)
17205 case DW_FORM_GNU_addr_index
:
17206 fprintf_unfiltered (f
, "address: ");
17207 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
17209 case DW_FORM_block2
:
17210 case DW_FORM_block4
:
17211 case DW_FORM_block
:
17212 case DW_FORM_block1
:
17213 fprintf_unfiltered (f
, "block: size %s",
17214 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
17216 case DW_FORM_exprloc
:
17217 fprintf_unfiltered (f
, "expression: size %s",
17218 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
17220 case DW_FORM_ref_addr
:
17221 fprintf_unfiltered (f
, "ref address: ");
17222 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
17224 case DW_FORM_GNU_ref_alt
:
17225 fprintf_unfiltered (f
, "alt ref address: ");
17226 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
17232 case DW_FORM_ref_udata
:
17233 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
17234 (long) (DW_UNSND (&die
->attrs
[i
])));
17236 case DW_FORM_data1
:
17237 case DW_FORM_data2
:
17238 case DW_FORM_data4
:
17239 case DW_FORM_data8
:
17240 case DW_FORM_udata
:
17241 case DW_FORM_sdata
:
17242 fprintf_unfiltered (f
, "constant: %s",
17243 pulongest (DW_UNSND (&die
->attrs
[i
])));
17245 case DW_FORM_sec_offset
:
17246 fprintf_unfiltered (f
, "section offset: %s",
17247 pulongest (DW_UNSND (&die
->attrs
[i
])));
17249 case DW_FORM_ref_sig8
:
17250 if (DW_SIGNATURED_TYPE (&die
->attrs
[i
]) != NULL
)
17251 fprintf_unfiltered (f
, "signatured type, offset: 0x%x",
17252 DW_SIGNATURED_TYPE (&die
->attrs
[i
])->per_cu
.offset
.sect_off
);
17254 fprintf_unfiltered (f
, "signatured type, offset: unknown");
17256 case DW_FORM_string
:
17258 case DW_FORM_GNU_str_index
:
17259 case DW_FORM_GNU_strp_alt
:
17260 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
17261 DW_STRING (&die
->attrs
[i
])
17262 ? DW_STRING (&die
->attrs
[i
]) : "",
17263 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
17266 if (DW_UNSND (&die
->attrs
[i
]))
17267 fprintf_unfiltered (f
, "flag: TRUE");
17269 fprintf_unfiltered (f
, "flag: FALSE");
17271 case DW_FORM_flag_present
:
17272 fprintf_unfiltered (f
, "flag: TRUE");
17274 case DW_FORM_indirect
:
17275 /* The reader will have reduced the indirect form to
17276 the "base form" so this form should not occur. */
17277 fprintf_unfiltered (f
,
17278 "unexpected attribute form: DW_FORM_indirect");
17281 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
17282 die
->attrs
[i
].form
);
17285 fprintf_unfiltered (f
, "\n");
17290 dump_die_for_error (struct die_info
*die
)
17292 dump_die_shallow (gdb_stderr
, 0, die
);
17296 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
17298 int indent
= level
* 4;
17300 gdb_assert (die
!= NULL
);
17302 if (level
>= max_level
)
17305 dump_die_shallow (f
, indent
, die
);
17307 if (die
->child
!= NULL
)
17309 print_spaces (indent
, f
);
17310 fprintf_unfiltered (f
, " Children:");
17311 if (level
+ 1 < max_level
)
17313 fprintf_unfiltered (f
, "\n");
17314 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
17318 fprintf_unfiltered (f
,
17319 " [not printed, max nesting level reached]\n");
17323 if (die
->sibling
!= NULL
&& level
> 0)
17325 dump_die_1 (f
, level
, max_level
, die
->sibling
);
17329 /* This is called from the pdie macro in gdbinit.in.
17330 It's not static so gcc will keep a copy callable from gdb. */
17333 dump_die (struct die_info
*die
, int max_level
)
17335 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
17339 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
17343 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
.sect_off
,
17349 /* DW_ADDR is always stored already as sect_offset; despite for the forms
17350 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
17353 is_ref_attr (struct attribute
*attr
)
17355 switch (attr
->form
)
17357 case DW_FORM_ref_addr
:
17362 case DW_FORM_ref_udata
:
17363 case DW_FORM_GNU_ref_alt
:
17370 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
17374 dwarf2_get_ref_die_offset (struct attribute
*attr
)
17376 sect_offset retval
= { DW_UNSND (attr
) };
17378 if (is_ref_attr (attr
))
17381 retval
.sect_off
= 0;
17382 complaint (&symfile_complaints
,
17383 _("unsupported die ref attribute form: '%s'"),
17384 dwarf_form_name (attr
->form
));
17388 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
17389 * the value held by the attribute is not constant. */
17392 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
17394 if (attr
->form
== DW_FORM_sdata
)
17395 return DW_SND (attr
);
17396 else if (attr
->form
== DW_FORM_udata
17397 || attr
->form
== DW_FORM_data1
17398 || attr
->form
== DW_FORM_data2
17399 || attr
->form
== DW_FORM_data4
17400 || attr
->form
== DW_FORM_data8
)
17401 return DW_UNSND (attr
);
17404 complaint (&symfile_complaints
,
17405 _("Attribute value is not a constant (%s)"),
17406 dwarf_form_name (attr
->form
));
17407 return default_value
;
17411 /* Follow reference or signature attribute ATTR of SRC_DIE.
17412 On entry *REF_CU is the CU of SRC_DIE.
17413 On exit *REF_CU is the CU of the result. */
17415 static struct die_info
*
17416 follow_die_ref_or_sig (struct die_info
*src_die
, struct attribute
*attr
,
17417 struct dwarf2_cu
**ref_cu
)
17419 struct die_info
*die
;
17421 if (is_ref_attr (attr
))
17422 die
= follow_die_ref (src_die
, attr
, ref_cu
);
17423 else if (attr
->form
== DW_FORM_ref_sig8
)
17424 die
= follow_die_sig (src_die
, attr
, ref_cu
);
17427 dump_die_for_error (src_die
);
17428 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
17429 (*ref_cu
)->objfile
->name
);
17435 /* Follow reference OFFSET.
17436 On entry *REF_CU is the CU of the source die referencing OFFSET.
17437 On exit *REF_CU is the CU of the result.
17438 Returns NULL if OFFSET is invalid. */
17440 static struct die_info
*
17441 follow_die_offset (sect_offset offset
, int offset_in_dwz
,
17442 struct dwarf2_cu
**ref_cu
)
17444 struct die_info temp_die
;
17445 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
17447 gdb_assert (cu
->per_cu
!= NULL
);
17451 if (cu
->per_cu
->is_debug_types
)
17453 /* .debug_types CUs cannot reference anything outside their CU.
17454 If they need to, they have to reference a signatured type via
17455 DW_FORM_ref_sig8. */
17456 if (! offset_in_cu_p (&cu
->header
, offset
))
17459 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
17460 || ! offset_in_cu_p (&cu
->header
, offset
))
17462 struct dwarf2_per_cu_data
*per_cu
;
17464 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
17467 /* If necessary, add it to the queue and load its DIEs. */
17468 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
17469 load_full_comp_unit (per_cu
, cu
->language
);
17471 target_cu
= per_cu
->cu
;
17473 else if (cu
->dies
== NULL
)
17475 /* We're loading full DIEs during partial symbol reading. */
17476 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
17477 load_full_comp_unit (cu
->per_cu
, language_minimal
);
17480 *ref_cu
= target_cu
;
17481 temp_die
.offset
= offset
;
17482 return htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
.sect_off
);
17485 /* Follow reference attribute ATTR of SRC_DIE.
17486 On entry *REF_CU is the CU of SRC_DIE.
17487 On exit *REF_CU is the CU of the result. */
17489 static struct die_info
*
17490 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
17491 struct dwarf2_cu
**ref_cu
)
17493 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
17494 struct dwarf2_cu
*cu
= *ref_cu
;
17495 struct die_info
*die
;
17497 die
= follow_die_offset (offset
,
17498 (attr
->form
== DW_FORM_GNU_ref_alt
17499 || cu
->per_cu
->is_dwz
),
17502 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
17503 "at 0x%x [in module %s]"),
17504 offset
.sect_off
, src_die
->offset
.sect_off
, cu
->objfile
->name
);
17509 /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU.
17510 Returned value is intended for DW_OP_call*. Returned
17511 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
17513 struct dwarf2_locexpr_baton
17514 dwarf2_fetch_die_loc_sect_off (sect_offset offset
,
17515 struct dwarf2_per_cu_data
*per_cu
,
17516 CORE_ADDR (*get_frame_pc
) (void *baton
),
17519 struct dwarf2_cu
*cu
;
17520 struct die_info
*die
;
17521 struct attribute
*attr
;
17522 struct dwarf2_locexpr_baton retval
;
17524 dw2_setup (per_cu
->objfile
);
17526 if (per_cu
->cu
== NULL
)
17530 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
17532 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
17533 offset
.sect_off
, per_cu
->objfile
->name
);
17535 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
17538 /* DWARF: "If there is no such attribute, then there is no effect.".
17539 DATA is ignored if SIZE is 0. */
17541 retval
.data
= NULL
;
17544 else if (attr_form_is_section_offset (attr
))
17546 struct dwarf2_loclist_baton loclist_baton
;
17547 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
17550 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
17552 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
17554 retval
.size
= size
;
17558 if (!attr_form_is_block (attr
))
17559 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
17560 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
17561 offset
.sect_off
, per_cu
->objfile
->name
);
17563 retval
.data
= DW_BLOCK (attr
)->data
;
17564 retval
.size
= DW_BLOCK (attr
)->size
;
17566 retval
.per_cu
= cu
->per_cu
;
17568 age_cached_comp_units ();
17573 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
17576 struct dwarf2_locexpr_baton
17577 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
17578 struct dwarf2_per_cu_data
*per_cu
,
17579 CORE_ADDR (*get_frame_pc
) (void *baton
),
17582 sect_offset offset
= { per_cu
->offset
.sect_off
+ offset_in_cu
.cu_off
};
17584 return dwarf2_fetch_die_loc_sect_off (offset
, per_cu
, get_frame_pc
, baton
);
17587 /* Return the type of the DIE at DIE_OFFSET in the CU named by
17591 dwarf2_get_die_type (cu_offset die_offset
,
17592 struct dwarf2_per_cu_data
*per_cu
)
17594 sect_offset die_offset_sect
;
17596 dw2_setup (per_cu
->objfile
);
17598 die_offset_sect
.sect_off
= per_cu
->offset
.sect_off
+ die_offset
.cu_off
;
17599 return get_die_type_at_offset (die_offset_sect
, per_cu
);
17602 /* Follow the signature attribute ATTR in SRC_DIE.
17603 On entry *REF_CU is the CU of SRC_DIE.
17604 On exit *REF_CU is the CU of the result. */
17606 static struct die_info
*
17607 follow_die_sig (struct die_info
*src_die
, struct attribute
*attr
,
17608 struct dwarf2_cu
**ref_cu
)
17610 struct objfile
*objfile
= (*ref_cu
)->objfile
;
17611 struct die_info temp_die
;
17612 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
17613 struct dwarf2_cu
*sig_cu
;
17614 struct die_info
*die
;
17616 /* sig_type will be NULL if the signatured type is missing from
17618 if (sig_type
== NULL
)
17619 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
17620 "at 0x%x [in module %s]"),
17621 src_die
->offset
.sect_off
, objfile
->name
);
17623 /* If necessary, add it to the queue and load its DIEs. */
17625 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
17626 read_signatured_type (sig_type
);
17628 gdb_assert (sig_type
->per_cu
.cu
!= NULL
);
17630 sig_cu
= sig_type
->per_cu
.cu
;
17631 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
17632 temp_die
.offset
= sig_type
->type_offset_in_section
;
17633 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
17634 temp_die
.offset
.sect_off
);
17637 /* For .gdb_index version 7 keep track of included TUs.
17638 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
17639 if (dwarf2_per_objfile
->index_table
!= NULL
17640 && dwarf2_per_objfile
->index_table
->version
<= 7)
17642 VEC_safe_push (dwarf2_per_cu_ptr
,
17643 (*ref_cu
)->per_cu
->imported_symtabs
,
17651 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced "
17652 "from DIE at 0x%x [in module %s]"),
17653 temp_die
.offset
.sect_off
, src_die
->offset
.sect_off
, objfile
->name
);
17656 /* Given an offset of a signatured type, return its signatured_type. */
17658 static struct signatured_type
*
17659 lookup_signatured_type_at_offset (struct objfile
*objfile
,
17660 struct dwarf2_section_info
*section
,
17661 sect_offset offset
)
17663 gdb_byte
*info_ptr
= section
->buffer
+ offset
.sect_off
;
17664 unsigned int length
, initial_length_size
;
17665 unsigned int sig_offset
;
17666 struct signatured_type find_entry
, *sig_type
;
17668 length
= read_initial_length (objfile
->obfd
, info_ptr
, &initial_length_size
);
17669 sig_offset
= (initial_length_size
17671 + (initial_length_size
== 4 ? 4 : 8) /*debug_abbrev_offset*/
17672 + 1 /*address_size*/);
17673 find_entry
.signature
= bfd_get_64 (objfile
->obfd
, info_ptr
+ sig_offset
);
17674 sig_type
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
17676 /* This is only used to lookup previously recorded types.
17677 If we didn't find it, it's our bug. */
17678 gdb_assert (sig_type
!= NULL
);
17679 gdb_assert (offset
.sect_off
== sig_type
->per_cu
.offset
.sect_off
);
17684 /* Load the DIEs associated with type unit PER_CU into memory. */
17687 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
17689 struct signatured_type
*sig_type
;
17691 /* Caller is responsible for ensuring type_unit_groups don't get here. */
17692 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
17694 /* We have the per_cu, but we need the signatured_type.
17695 Fortunately this is an easy translation. */
17696 gdb_assert (per_cu
->is_debug_types
);
17697 sig_type
= (struct signatured_type
*) per_cu
;
17699 gdb_assert (per_cu
->cu
== NULL
);
17701 read_signatured_type (sig_type
);
17703 gdb_assert (per_cu
->cu
!= NULL
);
17706 /* die_reader_func for read_signatured_type.
17707 This is identical to load_full_comp_unit_reader,
17708 but is kept separate for now. */
17711 read_signatured_type_reader (const struct die_reader_specs
*reader
,
17712 gdb_byte
*info_ptr
,
17713 struct die_info
*comp_unit_die
,
17717 struct dwarf2_cu
*cu
= reader
->cu
;
17719 gdb_assert (cu
->die_hash
== NULL
);
17721 htab_create_alloc_ex (cu
->header
.length
/ 12,
17725 &cu
->comp_unit_obstack
,
17726 hashtab_obstack_allocate
,
17727 dummy_obstack_deallocate
);
17730 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
17731 &info_ptr
, comp_unit_die
);
17732 cu
->dies
= comp_unit_die
;
17733 /* comp_unit_die is not stored in die_hash, no need. */
17735 /* We try not to read any attributes in this function, because not
17736 all CUs needed for references have been loaded yet, and symbol
17737 table processing isn't initialized. But we have to set the CU language,
17738 or we won't be able to build types correctly.
17739 Similarly, if we do not read the producer, we can not apply
17740 producer-specific interpretation. */
17741 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
17744 /* Read in a signatured type and build its CU and DIEs.
17745 If the type is a stub for the real type in a DWO file,
17746 read in the real type from the DWO file as well. */
17749 read_signatured_type (struct signatured_type
*sig_type
)
17751 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
17753 gdb_assert (per_cu
->is_debug_types
);
17754 gdb_assert (per_cu
->cu
== NULL
);
17756 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
17757 read_signatured_type_reader
, NULL
);
17760 /* Decode simple location descriptions.
17761 Given a pointer to a dwarf block that defines a location, compute
17762 the location and return the value.
17764 NOTE drow/2003-11-18: This function is called in two situations
17765 now: for the address of static or global variables (partial symbols
17766 only) and for offsets into structures which are expected to be
17767 (more or less) constant. The partial symbol case should go away,
17768 and only the constant case should remain. That will let this
17769 function complain more accurately. A few special modes are allowed
17770 without complaint for global variables (for instance, global
17771 register values and thread-local values).
17773 A location description containing no operations indicates that the
17774 object is optimized out. The return value is 0 for that case.
17775 FIXME drow/2003-11-16: No callers check for this case any more; soon all
17776 callers will only want a very basic result and this can become a
17779 Note that stack[0] is unused except as a default error return. */
17782 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
17784 struct objfile
*objfile
= cu
->objfile
;
17786 size_t size
= blk
->size
;
17787 gdb_byte
*data
= blk
->data
;
17788 CORE_ADDR stack
[64];
17790 unsigned int bytes_read
, unsnd
;
17796 stack
[++stacki
] = 0;
17835 stack
[++stacki
] = op
- DW_OP_lit0
;
17870 stack
[++stacki
] = op
- DW_OP_reg0
;
17872 dwarf2_complex_location_expr_complaint ();
17876 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
17878 stack
[++stacki
] = unsnd
;
17880 dwarf2_complex_location_expr_complaint ();
17884 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
17889 case DW_OP_const1u
:
17890 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
17894 case DW_OP_const1s
:
17895 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
17899 case DW_OP_const2u
:
17900 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
17904 case DW_OP_const2s
:
17905 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
17909 case DW_OP_const4u
:
17910 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
17914 case DW_OP_const4s
:
17915 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
17919 case DW_OP_const8u
:
17920 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
17925 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
17931 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
17936 stack
[stacki
+ 1] = stack
[stacki
];
17941 stack
[stacki
- 1] += stack
[stacki
];
17945 case DW_OP_plus_uconst
:
17946 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
17952 stack
[stacki
- 1] -= stack
[stacki
];
17957 /* If we're not the last op, then we definitely can't encode
17958 this using GDB's address_class enum. This is valid for partial
17959 global symbols, although the variable's address will be bogus
17962 dwarf2_complex_location_expr_complaint ();
17965 case DW_OP_GNU_push_tls_address
:
17966 /* The top of the stack has the offset from the beginning
17967 of the thread control block at which the variable is located. */
17968 /* Nothing should follow this operator, so the top of stack would
17970 /* This is valid for partial global symbols, but the variable's
17971 address will be bogus in the psymtab. Make it always at least
17972 non-zero to not look as a variable garbage collected by linker
17973 which have DW_OP_addr 0. */
17975 dwarf2_complex_location_expr_complaint ();
17979 case DW_OP_GNU_uninit
:
17982 case DW_OP_GNU_addr_index
:
17983 case DW_OP_GNU_const_index
:
17984 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
17991 const char *name
= get_DW_OP_name (op
);
17994 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
17997 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
18001 return (stack
[stacki
]);
18004 /* Enforce maximum stack depth of SIZE-1 to avoid writing
18005 outside of the allocated space. Also enforce minimum>0. */
18006 if (stacki
>= ARRAY_SIZE (stack
) - 1)
18008 complaint (&symfile_complaints
,
18009 _("location description stack overflow"));
18015 complaint (&symfile_complaints
,
18016 _("location description stack underflow"));
18020 return (stack
[stacki
]);
18023 /* memory allocation interface */
18025 static struct dwarf_block
*
18026 dwarf_alloc_block (struct dwarf2_cu
*cu
)
18028 struct dwarf_block
*blk
;
18030 blk
= (struct dwarf_block
*)
18031 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
18035 static struct die_info
*
18036 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
18038 struct die_info
*die
;
18039 size_t size
= sizeof (struct die_info
);
18042 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
18044 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
18045 memset (die
, 0, sizeof (struct die_info
));
18050 /* Macro support. */
18052 /* Return file name relative to the compilation directory of file number I in
18053 *LH's file name table. The result is allocated using xmalloc; the caller is
18054 responsible for freeing it. */
18057 file_file_name (int file
, struct line_header
*lh
)
18059 /* Is the file number a valid index into the line header's file name
18060 table? Remember that file numbers start with one, not zero. */
18061 if (1 <= file
&& file
<= lh
->num_file_names
)
18063 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
18065 if (IS_ABSOLUTE_PATH (fe
->name
) || fe
->dir_index
== 0)
18066 return xstrdup (fe
->name
);
18067 return concat (lh
->include_dirs
[fe
->dir_index
- 1], SLASH_STRING
,
18072 /* The compiler produced a bogus file number. We can at least
18073 record the macro definitions made in the file, even if we
18074 won't be able to find the file by name. */
18075 char fake_name
[80];
18077 xsnprintf (fake_name
, sizeof (fake_name
),
18078 "<bad macro file number %d>", file
);
18080 complaint (&symfile_complaints
,
18081 _("bad file number in macro information (%d)"),
18084 return xstrdup (fake_name
);
18088 /* Return the full name of file number I in *LH's file name table.
18089 Use COMP_DIR as the name of the current directory of the
18090 compilation. The result is allocated using xmalloc; the caller is
18091 responsible for freeing it. */
18093 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
18095 /* Is the file number a valid index into the line header's file name
18096 table? Remember that file numbers start with one, not zero. */
18097 if (1 <= file
&& file
<= lh
->num_file_names
)
18099 char *relative
= file_file_name (file
, lh
);
18101 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
18103 return reconcat (relative
, comp_dir
, SLASH_STRING
, relative
, NULL
);
18106 return file_file_name (file
, lh
);
18110 static struct macro_source_file
*
18111 macro_start_file (int file
, int line
,
18112 struct macro_source_file
*current_file
,
18113 const char *comp_dir
,
18114 struct line_header
*lh
, struct objfile
*objfile
)
18116 /* File name relative to the compilation directory of this source file. */
18117 char *file_name
= file_file_name (file
, lh
);
18119 /* We don't create a macro table for this compilation unit
18120 at all until we actually get a filename. */
18121 if (! pending_macros
)
18122 pending_macros
= new_macro_table (&objfile
->per_bfd
->storage_obstack
,
18123 objfile
->per_bfd
->macro_cache
,
18126 if (! current_file
)
18128 /* If we have no current file, then this must be the start_file
18129 directive for the compilation unit's main source file. */
18130 current_file
= macro_set_main (pending_macros
, file_name
);
18131 macro_define_special (pending_macros
);
18134 current_file
= macro_include (current_file
, line
, file_name
);
18138 return current_file
;
18142 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
18143 followed by a null byte. */
18145 copy_string (const char *buf
, int len
)
18147 char *s
= xmalloc (len
+ 1);
18149 memcpy (s
, buf
, len
);
18155 static const char *
18156 consume_improper_spaces (const char *p
, const char *body
)
18160 complaint (&symfile_complaints
,
18161 _("macro definition contains spaces "
18162 "in formal argument list:\n`%s'"),
18174 parse_macro_definition (struct macro_source_file
*file
, int line
,
18179 /* The body string takes one of two forms. For object-like macro
18180 definitions, it should be:
18182 <macro name> " " <definition>
18184 For function-like macro definitions, it should be:
18186 <macro name> "() " <definition>
18188 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
18190 Spaces may appear only where explicitly indicated, and in the
18193 The Dwarf 2 spec says that an object-like macro's name is always
18194 followed by a space, but versions of GCC around March 2002 omit
18195 the space when the macro's definition is the empty string.
18197 The Dwarf 2 spec says that there should be no spaces between the
18198 formal arguments in a function-like macro's formal argument list,
18199 but versions of GCC around March 2002 include spaces after the
18203 /* Find the extent of the macro name. The macro name is terminated
18204 by either a space or null character (for an object-like macro) or
18205 an opening paren (for a function-like macro). */
18206 for (p
= body
; *p
; p
++)
18207 if (*p
== ' ' || *p
== '(')
18210 if (*p
== ' ' || *p
== '\0')
18212 /* It's an object-like macro. */
18213 int name_len
= p
- body
;
18214 char *name
= copy_string (body
, name_len
);
18215 const char *replacement
;
18218 replacement
= body
+ name_len
+ 1;
18221 dwarf2_macro_malformed_definition_complaint (body
);
18222 replacement
= body
+ name_len
;
18225 macro_define_object (file
, line
, name
, replacement
);
18229 else if (*p
== '(')
18231 /* It's a function-like macro. */
18232 char *name
= copy_string (body
, p
- body
);
18235 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
18239 p
= consume_improper_spaces (p
, body
);
18241 /* Parse the formal argument list. */
18242 while (*p
&& *p
!= ')')
18244 /* Find the extent of the current argument name. */
18245 const char *arg_start
= p
;
18247 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
18250 if (! *p
|| p
== arg_start
)
18251 dwarf2_macro_malformed_definition_complaint (body
);
18254 /* Make sure argv has room for the new argument. */
18255 if (argc
>= argv_size
)
18258 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
18261 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
18264 p
= consume_improper_spaces (p
, body
);
18266 /* Consume the comma, if present. */
18271 p
= consume_improper_spaces (p
, body
);
18280 /* Perfectly formed definition, no complaints. */
18281 macro_define_function (file
, line
, name
,
18282 argc
, (const char **) argv
,
18284 else if (*p
== '\0')
18286 /* Complain, but do define it. */
18287 dwarf2_macro_malformed_definition_complaint (body
);
18288 macro_define_function (file
, line
, name
,
18289 argc
, (const char **) argv
,
18293 /* Just complain. */
18294 dwarf2_macro_malformed_definition_complaint (body
);
18297 /* Just complain. */
18298 dwarf2_macro_malformed_definition_complaint (body
);
18304 for (i
= 0; i
< argc
; i
++)
18310 dwarf2_macro_malformed_definition_complaint (body
);
18313 /* Skip some bytes from BYTES according to the form given in FORM.
18314 Returns the new pointer. */
18317 skip_form_bytes (bfd
*abfd
, gdb_byte
*bytes
, gdb_byte
*buffer_end
,
18318 enum dwarf_form form
,
18319 unsigned int offset_size
,
18320 struct dwarf2_section_info
*section
)
18322 unsigned int bytes_read
;
18326 case DW_FORM_data1
:
18331 case DW_FORM_data2
:
18335 case DW_FORM_data4
:
18339 case DW_FORM_data8
:
18343 case DW_FORM_string
:
18344 read_direct_string (abfd
, bytes
, &bytes_read
);
18345 bytes
+= bytes_read
;
18348 case DW_FORM_sec_offset
:
18350 case DW_FORM_GNU_strp_alt
:
18351 bytes
+= offset_size
;
18354 case DW_FORM_block
:
18355 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
18356 bytes
+= bytes_read
;
18359 case DW_FORM_block1
:
18360 bytes
+= 1 + read_1_byte (abfd
, bytes
);
18362 case DW_FORM_block2
:
18363 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
18365 case DW_FORM_block4
:
18366 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
18369 case DW_FORM_sdata
:
18370 case DW_FORM_udata
:
18371 case DW_FORM_GNU_addr_index
:
18372 case DW_FORM_GNU_str_index
:
18373 bytes
= (gdb_byte
*) gdb_skip_leb128 (bytes
, buffer_end
);
18376 dwarf2_section_buffer_overflow_complaint (section
);
18384 complaint (&symfile_complaints
,
18385 _("invalid form 0x%x in `%s'"),
18387 section
->asection
->name
);
18395 /* A helper for dwarf_decode_macros that handles skipping an unknown
18396 opcode. Returns an updated pointer to the macro data buffer; or,
18397 on error, issues a complaint and returns NULL. */
18400 skip_unknown_opcode (unsigned int opcode
,
18401 gdb_byte
**opcode_definitions
,
18402 gdb_byte
*mac_ptr
, gdb_byte
*mac_end
,
18404 unsigned int offset_size
,
18405 struct dwarf2_section_info
*section
)
18407 unsigned int bytes_read
, i
;
18411 if (opcode_definitions
[opcode
] == NULL
)
18413 complaint (&symfile_complaints
,
18414 _("unrecognized DW_MACFINO opcode 0x%x"),
18419 defn
= opcode_definitions
[opcode
];
18420 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
18421 defn
+= bytes_read
;
18423 for (i
= 0; i
< arg
; ++i
)
18425 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
, defn
[i
], offset_size
,
18427 if (mac_ptr
== NULL
)
18429 /* skip_form_bytes already issued the complaint. */
18437 /* A helper function which parses the header of a macro section.
18438 If the macro section is the extended (for now called "GNU") type,
18439 then this updates *OFFSET_SIZE. Returns a pointer to just after
18440 the header, or issues a complaint and returns NULL on error. */
18443 dwarf_parse_macro_header (gdb_byte
**opcode_definitions
,
18446 unsigned int *offset_size
,
18447 int section_is_gnu
)
18449 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
18451 if (section_is_gnu
)
18453 unsigned int version
, flags
;
18455 version
= read_2_bytes (abfd
, mac_ptr
);
18458 complaint (&symfile_complaints
,
18459 _("unrecognized version `%d' in .debug_macro section"),
18465 flags
= read_1_byte (abfd
, mac_ptr
);
18467 *offset_size
= (flags
& 1) ? 8 : 4;
18469 if ((flags
& 2) != 0)
18470 /* We don't need the line table offset. */
18471 mac_ptr
+= *offset_size
;
18473 /* Vendor opcode descriptions. */
18474 if ((flags
& 4) != 0)
18476 unsigned int i
, count
;
18478 count
= read_1_byte (abfd
, mac_ptr
);
18480 for (i
= 0; i
< count
; ++i
)
18482 unsigned int opcode
, bytes_read
;
18485 opcode
= read_1_byte (abfd
, mac_ptr
);
18487 opcode_definitions
[opcode
] = mac_ptr
;
18488 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18489 mac_ptr
+= bytes_read
;
18498 /* A helper for dwarf_decode_macros that handles the GNU extensions,
18499 including DW_MACRO_GNU_transparent_include. */
18502 dwarf_decode_macro_bytes (bfd
*abfd
, gdb_byte
*mac_ptr
, gdb_byte
*mac_end
,
18503 struct macro_source_file
*current_file
,
18504 struct line_header
*lh
, const char *comp_dir
,
18505 struct dwarf2_section_info
*section
,
18506 int section_is_gnu
, int section_is_dwz
,
18507 unsigned int offset_size
,
18508 struct objfile
*objfile
,
18509 htab_t include_hash
)
18511 enum dwarf_macro_record_type macinfo_type
;
18512 int at_commandline
;
18513 gdb_byte
*opcode_definitions
[256];
18515 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
18516 &offset_size
, section_is_gnu
);
18517 if (mac_ptr
== NULL
)
18519 /* We already issued a complaint. */
18523 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
18524 GDB is still reading the definitions from command line. First
18525 DW_MACINFO_start_file will need to be ignored as it was already executed
18526 to create CURRENT_FILE for the main source holding also the command line
18527 definitions. On first met DW_MACINFO_start_file this flag is reset to
18528 normally execute all the remaining DW_MACINFO_start_file macinfos. */
18530 at_commandline
= 1;
18534 /* Do we at least have room for a macinfo type byte? */
18535 if (mac_ptr
>= mac_end
)
18537 dwarf2_section_buffer_overflow_complaint (section
);
18541 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
18544 /* Note that we rely on the fact that the corresponding GNU and
18545 DWARF constants are the same. */
18546 switch (macinfo_type
)
18548 /* A zero macinfo type indicates the end of the macro
18553 case DW_MACRO_GNU_define
:
18554 case DW_MACRO_GNU_undef
:
18555 case DW_MACRO_GNU_define_indirect
:
18556 case DW_MACRO_GNU_undef_indirect
:
18557 case DW_MACRO_GNU_define_indirect_alt
:
18558 case DW_MACRO_GNU_undef_indirect_alt
:
18560 unsigned int bytes_read
;
18565 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18566 mac_ptr
+= bytes_read
;
18568 if (macinfo_type
== DW_MACRO_GNU_define
18569 || macinfo_type
== DW_MACRO_GNU_undef
)
18571 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
18572 mac_ptr
+= bytes_read
;
18576 LONGEST str_offset
;
18578 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
18579 mac_ptr
+= offset_size
;
18581 if (macinfo_type
== DW_MACRO_GNU_define_indirect_alt
18582 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
18585 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
18587 body
= read_indirect_string_from_dwz (dwz
, str_offset
);
18590 body
= read_indirect_string_at_offset (abfd
, str_offset
);
18593 is_define
= (macinfo_type
== DW_MACRO_GNU_define
18594 || macinfo_type
== DW_MACRO_GNU_define_indirect
18595 || macinfo_type
== DW_MACRO_GNU_define_indirect_alt
);
18596 if (! current_file
)
18598 /* DWARF violation as no main source is present. */
18599 complaint (&symfile_complaints
,
18600 _("debug info with no main source gives macro %s "
18602 is_define
? _("definition") : _("undefinition"),
18606 if ((line
== 0 && !at_commandline
)
18607 || (line
!= 0 && at_commandline
))
18608 complaint (&symfile_complaints
,
18609 _("debug info gives %s macro %s with %s line %d: %s"),
18610 at_commandline
? _("command-line") : _("in-file"),
18611 is_define
? _("definition") : _("undefinition"),
18612 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
18615 parse_macro_definition (current_file
, line
, body
);
18618 gdb_assert (macinfo_type
== DW_MACRO_GNU_undef
18619 || macinfo_type
== DW_MACRO_GNU_undef_indirect
18620 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
);
18621 macro_undef (current_file
, line
, body
);
18626 case DW_MACRO_GNU_start_file
:
18628 unsigned int bytes_read
;
18631 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18632 mac_ptr
+= bytes_read
;
18633 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18634 mac_ptr
+= bytes_read
;
18636 if ((line
== 0 && !at_commandline
)
18637 || (line
!= 0 && at_commandline
))
18638 complaint (&symfile_complaints
,
18639 _("debug info gives source %d included "
18640 "from %s at %s line %d"),
18641 file
, at_commandline
? _("command-line") : _("file"),
18642 line
== 0 ? _("zero") : _("non-zero"), line
);
18644 if (at_commandline
)
18646 /* This DW_MACRO_GNU_start_file was executed in the
18648 at_commandline
= 0;
18651 current_file
= macro_start_file (file
, line
,
18652 current_file
, comp_dir
,
18657 case DW_MACRO_GNU_end_file
:
18658 if (! current_file
)
18659 complaint (&symfile_complaints
,
18660 _("macro debug info has an unmatched "
18661 "`close_file' directive"));
18664 current_file
= current_file
->included_by
;
18665 if (! current_file
)
18667 enum dwarf_macro_record_type next_type
;
18669 /* GCC circa March 2002 doesn't produce the zero
18670 type byte marking the end of the compilation
18671 unit. Complain if it's not there, but exit no
18674 /* Do we at least have room for a macinfo type byte? */
18675 if (mac_ptr
>= mac_end
)
18677 dwarf2_section_buffer_overflow_complaint (section
);
18681 /* We don't increment mac_ptr here, so this is just
18683 next_type
= read_1_byte (abfd
, mac_ptr
);
18684 if (next_type
!= 0)
18685 complaint (&symfile_complaints
,
18686 _("no terminating 0-type entry for "
18687 "macros in `.debug_macinfo' section"));
18694 case DW_MACRO_GNU_transparent_include
:
18695 case DW_MACRO_GNU_transparent_include_alt
:
18699 bfd
*include_bfd
= abfd
;
18700 struct dwarf2_section_info
*include_section
= section
;
18701 struct dwarf2_section_info alt_section
;
18702 gdb_byte
*include_mac_end
= mac_end
;
18703 int is_dwz
= section_is_dwz
;
18704 gdb_byte
*new_mac_ptr
;
18706 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
18707 mac_ptr
+= offset_size
;
18709 if (macinfo_type
== DW_MACRO_GNU_transparent_include_alt
)
18711 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
18713 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
18716 include_bfd
= dwz
->macro
.asection
->owner
;
18717 include_section
= &dwz
->macro
;
18718 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
18722 new_mac_ptr
= include_section
->buffer
+ offset
;
18723 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
18727 /* This has actually happened; see
18728 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
18729 complaint (&symfile_complaints
,
18730 _("recursive DW_MACRO_GNU_transparent_include in "
18731 ".debug_macro section"));
18735 *slot
= new_mac_ptr
;
18737 dwarf_decode_macro_bytes (include_bfd
, new_mac_ptr
,
18738 include_mac_end
, current_file
,
18740 section
, section_is_gnu
, is_dwz
,
18741 offset_size
, objfile
, include_hash
);
18743 htab_remove_elt (include_hash
, new_mac_ptr
);
18748 case DW_MACINFO_vendor_ext
:
18749 if (!section_is_gnu
)
18751 unsigned int bytes_read
;
18754 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18755 mac_ptr
+= bytes_read
;
18756 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
18757 mac_ptr
+= bytes_read
;
18759 /* We don't recognize any vendor extensions. */
18765 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
18766 mac_ptr
, mac_end
, abfd
, offset_size
,
18768 if (mac_ptr
== NULL
)
18772 } while (macinfo_type
!= 0);
18776 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
18777 const char *comp_dir
, int section_is_gnu
)
18779 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18780 struct line_header
*lh
= cu
->line_header
;
18782 gdb_byte
*mac_ptr
, *mac_end
;
18783 struct macro_source_file
*current_file
= 0;
18784 enum dwarf_macro_record_type macinfo_type
;
18785 unsigned int offset_size
= cu
->header
.offset_size
;
18786 gdb_byte
*opcode_definitions
[256];
18787 struct cleanup
*cleanup
;
18788 htab_t include_hash
;
18790 struct dwarf2_section_info
*section
;
18791 const char *section_name
;
18793 if (cu
->dwo_unit
!= NULL
)
18795 if (section_is_gnu
)
18797 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
18798 section_name
= ".debug_macro.dwo";
18802 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
18803 section_name
= ".debug_macinfo.dwo";
18808 if (section_is_gnu
)
18810 section
= &dwarf2_per_objfile
->macro
;
18811 section_name
= ".debug_macro";
18815 section
= &dwarf2_per_objfile
->macinfo
;
18816 section_name
= ".debug_macinfo";
18820 dwarf2_read_section (objfile
, section
);
18821 if (section
->buffer
== NULL
)
18823 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
18826 abfd
= section
->asection
->owner
;
18828 /* First pass: Find the name of the base filename.
18829 This filename is needed in order to process all macros whose definition
18830 (or undefinition) comes from the command line. These macros are defined
18831 before the first DW_MACINFO_start_file entry, and yet still need to be
18832 associated to the base file.
18834 To determine the base file name, we scan the macro definitions until we
18835 reach the first DW_MACINFO_start_file entry. We then initialize
18836 CURRENT_FILE accordingly so that any macro definition found before the
18837 first DW_MACINFO_start_file can still be associated to the base file. */
18839 mac_ptr
= section
->buffer
+ offset
;
18840 mac_end
= section
->buffer
+ section
->size
;
18842 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
18843 &offset_size
, section_is_gnu
);
18844 if (mac_ptr
== NULL
)
18846 /* We already issued a complaint. */
18852 /* Do we at least have room for a macinfo type byte? */
18853 if (mac_ptr
>= mac_end
)
18855 /* Complaint is printed during the second pass as GDB will probably
18856 stop the first pass earlier upon finding
18857 DW_MACINFO_start_file. */
18861 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
18864 /* Note that we rely on the fact that the corresponding GNU and
18865 DWARF constants are the same. */
18866 switch (macinfo_type
)
18868 /* A zero macinfo type indicates the end of the macro
18873 case DW_MACRO_GNU_define
:
18874 case DW_MACRO_GNU_undef
:
18875 /* Only skip the data by MAC_PTR. */
18877 unsigned int bytes_read
;
18879 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18880 mac_ptr
+= bytes_read
;
18881 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
18882 mac_ptr
+= bytes_read
;
18886 case DW_MACRO_GNU_start_file
:
18888 unsigned int bytes_read
;
18891 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18892 mac_ptr
+= bytes_read
;
18893 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18894 mac_ptr
+= bytes_read
;
18896 current_file
= macro_start_file (file
, line
, current_file
,
18897 comp_dir
, lh
, objfile
);
18901 case DW_MACRO_GNU_end_file
:
18902 /* No data to skip by MAC_PTR. */
18905 case DW_MACRO_GNU_define_indirect
:
18906 case DW_MACRO_GNU_undef_indirect
:
18907 case DW_MACRO_GNU_define_indirect_alt
:
18908 case DW_MACRO_GNU_undef_indirect_alt
:
18910 unsigned int bytes_read
;
18912 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18913 mac_ptr
+= bytes_read
;
18914 mac_ptr
+= offset_size
;
18918 case DW_MACRO_GNU_transparent_include
:
18919 case DW_MACRO_GNU_transparent_include_alt
:
18920 /* Note that, according to the spec, a transparent include
18921 chain cannot call DW_MACRO_GNU_start_file. So, we can just
18922 skip this opcode. */
18923 mac_ptr
+= offset_size
;
18926 case DW_MACINFO_vendor_ext
:
18927 /* Only skip the data by MAC_PTR. */
18928 if (!section_is_gnu
)
18930 unsigned int bytes_read
;
18932 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18933 mac_ptr
+= bytes_read
;
18934 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
18935 mac_ptr
+= bytes_read
;
18940 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
18941 mac_ptr
, mac_end
, abfd
, offset_size
,
18943 if (mac_ptr
== NULL
)
18947 } while (macinfo_type
!= 0 && current_file
== NULL
);
18949 /* Second pass: Process all entries.
18951 Use the AT_COMMAND_LINE flag to determine whether we are still processing
18952 command-line macro definitions/undefinitions. This flag is unset when we
18953 reach the first DW_MACINFO_start_file entry. */
18955 include_hash
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
18956 NULL
, xcalloc
, xfree
);
18957 cleanup
= make_cleanup_htab_delete (include_hash
);
18958 mac_ptr
= section
->buffer
+ offset
;
18959 slot
= htab_find_slot (include_hash
, mac_ptr
, INSERT
);
18961 dwarf_decode_macro_bytes (abfd
, mac_ptr
, mac_end
,
18962 current_file
, lh
, comp_dir
, section
,
18964 offset_size
, objfile
, include_hash
);
18965 do_cleanups (cleanup
);
18968 /* Check if the attribute's form is a DW_FORM_block*
18969 if so return true else false. */
18972 attr_form_is_block (struct attribute
*attr
)
18974 return (attr
== NULL
? 0 :
18975 attr
->form
== DW_FORM_block1
18976 || attr
->form
== DW_FORM_block2
18977 || attr
->form
== DW_FORM_block4
18978 || attr
->form
== DW_FORM_block
18979 || attr
->form
== DW_FORM_exprloc
);
18982 /* Return non-zero if ATTR's value is a section offset --- classes
18983 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
18984 You may use DW_UNSND (attr) to retrieve such offsets.
18986 Section 7.5.4, "Attribute Encodings", explains that no attribute
18987 may have a value that belongs to more than one of these classes; it
18988 would be ambiguous if we did, because we use the same forms for all
18992 attr_form_is_section_offset (struct attribute
*attr
)
18994 return (attr
->form
== DW_FORM_data4
18995 || attr
->form
== DW_FORM_data8
18996 || attr
->form
== DW_FORM_sec_offset
);
18999 /* Return non-zero if ATTR's value falls in the 'constant' class, or
19000 zero otherwise. When this function returns true, you can apply
19001 dwarf2_get_attr_constant_value to it.
19003 However, note that for some attributes you must check
19004 attr_form_is_section_offset before using this test. DW_FORM_data4
19005 and DW_FORM_data8 are members of both the constant class, and of
19006 the classes that contain offsets into other debug sections
19007 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
19008 that, if an attribute's can be either a constant or one of the
19009 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
19010 taken as section offsets, not constants. */
19013 attr_form_is_constant (struct attribute
*attr
)
19015 switch (attr
->form
)
19017 case DW_FORM_sdata
:
19018 case DW_FORM_udata
:
19019 case DW_FORM_data1
:
19020 case DW_FORM_data2
:
19021 case DW_FORM_data4
:
19022 case DW_FORM_data8
:
19029 /* Return the .debug_loc section to use for CU.
19030 For DWO files use .debug_loc.dwo. */
19032 static struct dwarf2_section_info
*
19033 cu_debug_loc_section (struct dwarf2_cu
*cu
)
19036 return &cu
->dwo_unit
->dwo_file
->sections
.loc
;
19037 return &dwarf2_per_objfile
->loc
;
19040 /* A helper function that fills in a dwarf2_loclist_baton. */
19043 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
19044 struct dwarf2_loclist_baton
*baton
,
19045 struct attribute
*attr
)
19047 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
19049 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
19051 baton
->per_cu
= cu
->per_cu
;
19052 gdb_assert (baton
->per_cu
);
19053 /* We don't know how long the location list is, but make sure we
19054 don't run off the edge of the section. */
19055 baton
->size
= section
->size
- DW_UNSND (attr
);
19056 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
19057 baton
->base_address
= cu
->base_address
;
19058 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
19062 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
19063 struct dwarf2_cu
*cu
)
19065 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19066 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
19068 if (attr_form_is_section_offset (attr
)
19069 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
19070 the section. If so, fall through to the complaint in the
19072 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
19074 struct dwarf2_loclist_baton
*baton
;
19076 baton
= obstack_alloc (&objfile
->objfile_obstack
,
19077 sizeof (struct dwarf2_loclist_baton
));
19079 fill_in_loclist_baton (cu
, baton
, attr
);
19081 if (cu
->base_known
== 0)
19082 complaint (&symfile_complaints
,
19083 _("Location list used without "
19084 "specifying the CU base address."));
19086 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_loclist_funcs
;
19087 SYMBOL_LOCATION_BATON (sym
) = baton
;
19091 struct dwarf2_locexpr_baton
*baton
;
19093 baton
= obstack_alloc (&objfile
->objfile_obstack
,
19094 sizeof (struct dwarf2_locexpr_baton
));
19095 baton
->per_cu
= cu
->per_cu
;
19096 gdb_assert (baton
->per_cu
);
19098 if (attr_form_is_block (attr
))
19100 /* Note that we're just copying the block's data pointer
19101 here, not the actual data. We're still pointing into the
19102 info_buffer for SYM's objfile; right now we never release
19103 that buffer, but when we do clean up properly this may
19105 baton
->size
= DW_BLOCK (attr
)->size
;
19106 baton
->data
= DW_BLOCK (attr
)->data
;
19110 dwarf2_invalid_attrib_class_complaint ("location description",
19111 SYMBOL_NATURAL_NAME (sym
));
19115 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
19116 SYMBOL_LOCATION_BATON (sym
) = baton
;
19120 /* Return the OBJFILE associated with the compilation unit CU. If CU
19121 came from a separate debuginfo file, then the master objfile is
19125 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
19127 struct objfile
*objfile
= per_cu
->objfile
;
19129 /* Return the master objfile, so that we can report and look up the
19130 correct file containing this variable. */
19131 if (objfile
->separate_debug_objfile_backlink
)
19132 objfile
= objfile
->separate_debug_objfile_backlink
;
19137 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
19138 (CU_HEADERP is unused in such case) or prepare a temporary copy at
19139 CU_HEADERP first. */
19141 static const struct comp_unit_head
*
19142 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
19143 struct dwarf2_per_cu_data
*per_cu
)
19145 gdb_byte
*info_ptr
;
19148 return &per_cu
->cu
->header
;
19150 info_ptr
= per_cu
->info_or_types_section
->buffer
+ per_cu
->offset
.sect_off
;
19152 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
19153 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->objfile
->obfd
);
19158 /* Return the address size given in the compilation unit header for CU. */
19161 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
19163 struct comp_unit_head cu_header_local
;
19164 const struct comp_unit_head
*cu_headerp
;
19166 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
19168 return cu_headerp
->addr_size
;
19171 /* Return the offset size given in the compilation unit header for CU. */
19174 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
19176 struct comp_unit_head cu_header_local
;
19177 const struct comp_unit_head
*cu_headerp
;
19179 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
19181 return cu_headerp
->offset_size
;
19184 /* See its dwarf2loc.h declaration. */
19187 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
19189 struct comp_unit_head cu_header_local
;
19190 const struct comp_unit_head
*cu_headerp
;
19192 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
19194 if (cu_headerp
->version
== 2)
19195 return cu_headerp
->addr_size
;
19197 return cu_headerp
->offset_size
;
19200 /* Return the text offset of the CU. The returned offset comes from
19201 this CU's objfile. If this objfile came from a separate debuginfo
19202 file, then the offset may be different from the corresponding
19203 offset in the parent objfile. */
19206 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
19208 struct objfile
*objfile
= per_cu
->objfile
;
19210 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
19213 /* Locate the .debug_info compilation unit from CU's objfile which contains
19214 the DIE at OFFSET. Raises an error on failure. */
19216 static struct dwarf2_per_cu_data
*
19217 dwarf2_find_containing_comp_unit (sect_offset offset
,
19218 unsigned int offset_in_dwz
,
19219 struct objfile
*objfile
)
19221 struct dwarf2_per_cu_data
*this_cu
;
19223 const sect_offset
*cu_off
;
19226 high
= dwarf2_per_objfile
->n_comp_units
- 1;
19229 struct dwarf2_per_cu_data
*mid_cu
;
19230 int mid
= low
+ (high
- low
) / 2;
19232 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
19233 cu_off
= &mid_cu
->offset
;
19234 if (mid_cu
->is_dwz
> offset_in_dwz
19235 || (mid_cu
->is_dwz
== offset_in_dwz
19236 && cu_off
->sect_off
>= offset
.sect_off
))
19241 gdb_assert (low
== high
);
19242 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
19243 cu_off
= &this_cu
->offset
;
19244 if (this_cu
->is_dwz
!= offset_in_dwz
|| cu_off
->sect_off
> offset
.sect_off
)
19246 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
19247 error (_("Dwarf Error: could not find partial DIE containing "
19248 "offset 0x%lx [in module %s]"),
19249 (long) offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
19251 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
.sect_off
19252 <= offset
.sect_off
);
19253 return dwarf2_per_objfile
->all_comp_units
[low
-1];
19257 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
19258 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
19259 && offset
.sect_off
>= this_cu
->offset
.sect_off
+ this_cu
->length
)
19260 error (_("invalid dwarf2 offset %u"), offset
.sect_off
);
19261 gdb_assert (offset
.sect_off
< this_cu
->offset
.sect_off
+ this_cu
->length
);
19266 /* Initialize dwarf2_cu CU, owned by PER_CU. */
19269 init_one_comp_unit (struct dwarf2_cu
*cu
, struct dwarf2_per_cu_data
*per_cu
)
19271 memset (cu
, 0, sizeof (*cu
));
19273 cu
->per_cu
= per_cu
;
19274 cu
->objfile
= per_cu
->objfile
;
19275 obstack_init (&cu
->comp_unit_obstack
);
19278 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
19281 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
19282 enum language pretend_language
)
19284 struct attribute
*attr
;
19286 /* Set the language we're debugging. */
19287 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
19289 set_cu_language (DW_UNSND (attr
), cu
);
19292 cu
->language
= pretend_language
;
19293 cu
->language_defn
= language_def (cu
->language
);
19296 attr
= dwarf2_attr (comp_unit_die
, DW_AT_producer
, cu
);
19298 cu
->producer
= DW_STRING (attr
);
19301 /* Release one cached compilation unit, CU. We unlink it from the tree
19302 of compilation units, but we don't remove it from the read_in_chain;
19303 the caller is responsible for that.
19304 NOTE: DATA is a void * because this function is also used as a
19305 cleanup routine. */
19308 free_heap_comp_unit (void *data
)
19310 struct dwarf2_cu
*cu
= data
;
19312 gdb_assert (cu
->per_cu
!= NULL
);
19313 cu
->per_cu
->cu
= NULL
;
19316 obstack_free (&cu
->comp_unit_obstack
, NULL
);
19321 /* This cleanup function is passed the address of a dwarf2_cu on the stack
19322 when we're finished with it. We can't free the pointer itself, but be
19323 sure to unlink it from the cache. Also release any associated storage. */
19326 free_stack_comp_unit (void *data
)
19328 struct dwarf2_cu
*cu
= data
;
19330 gdb_assert (cu
->per_cu
!= NULL
);
19331 cu
->per_cu
->cu
= NULL
;
19334 obstack_free (&cu
->comp_unit_obstack
, NULL
);
19335 cu
->partial_dies
= NULL
;
19338 /* Free all cached compilation units. */
19341 free_cached_comp_units (void *data
)
19343 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
19345 per_cu
= dwarf2_per_objfile
->read_in_chain
;
19346 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
19347 while (per_cu
!= NULL
)
19349 struct dwarf2_per_cu_data
*next_cu
;
19351 next_cu
= per_cu
->cu
->read_in_chain
;
19353 free_heap_comp_unit (per_cu
->cu
);
19354 *last_chain
= next_cu
;
19360 /* Increase the age counter on each cached compilation unit, and free
19361 any that are too old. */
19364 age_cached_comp_units (void)
19366 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
19368 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
19369 per_cu
= dwarf2_per_objfile
->read_in_chain
;
19370 while (per_cu
!= NULL
)
19372 per_cu
->cu
->last_used
++;
19373 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
19374 dwarf2_mark (per_cu
->cu
);
19375 per_cu
= per_cu
->cu
->read_in_chain
;
19378 per_cu
= dwarf2_per_objfile
->read_in_chain
;
19379 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
19380 while (per_cu
!= NULL
)
19382 struct dwarf2_per_cu_data
*next_cu
;
19384 next_cu
= per_cu
->cu
->read_in_chain
;
19386 if (!per_cu
->cu
->mark
)
19388 free_heap_comp_unit (per_cu
->cu
);
19389 *last_chain
= next_cu
;
19392 last_chain
= &per_cu
->cu
->read_in_chain
;
19398 /* Remove a single compilation unit from the cache. */
19401 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
19403 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
19405 per_cu
= dwarf2_per_objfile
->read_in_chain
;
19406 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
19407 while (per_cu
!= NULL
)
19409 struct dwarf2_per_cu_data
*next_cu
;
19411 next_cu
= per_cu
->cu
->read_in_chain
;
19413 if (per_cu
== target_per_cu
)
19415 free_heap_comp_unit (per_cu
->cu
);
19417 *last_chain
= next_cu
;
19421 last_chain
= &per_cu
->cu
->read_in_chain
;
19427 /* Release all extra memory associated with OBJFILE. */
19430 dwarf2_free_objfile (struct objfile
*objfile
)
19432 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
19434 if (dwarf2_per_objfile
== NULL
)
19437 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
19438 free_cached_comp_units (NULL
);
19440 if (dwarf2_per_objfile
->quick_file_names_table
)
19441 htab_delete (dwarf2_per_objfile
->quick_file_names_table
);
19443 /* Everything else should be on the objfile obstack. */
19446 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
19447 We store these in a hash table separate from the DIEs, and preserve them
19448 when the DIEs are flushed out of cache.
19450 The CU "per_cu" pointer is needed because offset alone is not enough to
19451 uniquely identify the type. A file may have multiple .debug_types sections,
19452 or the type may come from a DWO file. We have to use something in
19453 dwarf2_per_cu_data (or the pointer to it) because we can enter the lookup
19454 routine, get_die_type_at_offset, from outside this file, and thus won't
19455 necessarily have PER_CU->cu. Fortunately, PER_CU is stable for the life
19458 struct dwarf2_per_cu_offset_and_type
19460 const struct dwarf2_per_cu_data
*per_cu
;
19461 sect_offset offset
;
19465 /* Hash function for a dwarf2_per_cu_offset_and_type. */
19468 per_cu_offset_and_type_hash (const void *item
)
19470 const struct dwarf2_per_cu_offset_and_type
*ofs
= item
;
19472 return (uintptr_t) ofs
->per_cu
+ ofs
->offset
.sect_off
;
19475 /* Equality function for a dwarf2_per_cu_offset_and_type. */
19478 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
19480 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
= item_lhs
;
19481 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
= item_rhs
;
19483 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
19484 && ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
);
19487 /* Set the type associated with DIE to TYPE. Save it in CU's hash
19488 table if necessary. For convenience, return TYPE.
19490 The DIEs reading must have careful ordering to:
19491 * Not cause infite loops trying to read in DIEs as a prerequisite for
19492 reading current DIE.
19493 * Not trying to dereference contents of still incompletely read in types
19494 while reading in other DIEs.
19495 * Enable referencing still incompletely read in types just by a pointer to
19496 the type without accessing its fields.
19498 Therefore caller should follow these rules:
19499 * Try to fetch any prerequisite types we may need to build this DIE type
19500 before building the type and calling set_die_type.
19501 * After building type call set_die_type for current DIE as soon as
19502 possible before fetching more types to complete the current type.
19503 * Make the type as complete as possible before fetching more types. */
19505 static struct type
*
19506 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
19508 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
19509 struct objfile
*objfile
= cu
->objfile
;
19511 /* For Ada types, make sure that the gnat-specific data is always
19512 initialized (if not already set). There are a few types where
19513 we should not be doing so, because the type-specific area is
19514 already used to hold some other piece of info (eg: TYPE_CODE_FLT
19515 where the type-specific area is used to store the floatformat).
19516 But this is not a problem, because the gnat-specific information
19517 is actually not needed for these types. */
19518 if (need_gnat_info (cu
)
19519 && TYPE_CODE (type
) != TYPE_CODE_FUNC
19520 && TYPE_CODE (type
) != TYPE_CODE_FLT
19521 && !HAVE_GNAT_AUX_INFO (type
))
19522 INIT_GNAT_SPECIFIC (type
);
19524 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
19526 dwarf2_per_objfile
->die_type_hash
=
19527 htab_create_alloc_ex (127,
19528 per_cu_offset_and_type_hash
,
19529 per_cu_offset_and_type_eq
,
19531 &objfile
->objfile_obstack
,
19532 hashtab_obstack_allocate
,
19533 dummy_obstack_deallocate
);
19536 ofs
.per_cu
= cu
->per_cu
;
19537 ofs
.offset
= die
->offset
;
19539 slot
= (struct dwarf2_per_cu_offset_and_type
**)
19540 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
19542 complaint (&symfile_complaints
,
19543 _("A problem internal to GDB: DIE 0x%x has type already set"),
19544 die
->offset
.sect_off
);
19545 *slot
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (**slot
));
19550 /* Look up the type for the die at OFFSET in the appropriate type_hash
19551 table, or return NULL if the die does not have a saved type. */
19553 static struct type
*
19554 get_die_type_at_offset (sect_offset offset
,
19555 struct dwarf2_per_cu_data
*per_cu
)
19557 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
19559 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
19562 ofs
.per_cu
= per_cu
;
19563 ofs
.offset
= offset
;
19564 slot
= htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
);
19571 /* Look up the type for DIE in the appropriate type_hash table,
19572 or return NULL if DIE does not have a saved type. */
19574 static struct type
*
19575 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
19577 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
19580 /* Add a dependence relationship from CU to REF_PER_CU. */
19583 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
19584 struct dwarf2_per_cu_data
*ref_per_cu
)
19588 if (cu
->dependencies
== NULL
)
19590 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
19591 NULL
, &cu
->comp_unit_obstack
,
19592 hashtab_obstack_allocate
,
19593 dummy_obstack_deallocate
);
19595 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
19597 *slot
= ref_per_cu
;
19600 /* Subroutine of dwarf2_mark to pass to htab_traverse.
19601 Set the mark field in every compilation unit in the
19602 cache that we must keep because we are keeping CU. */
19605 dwarf2_mark_helper (void **slot
, void *data
)
19607 struct dwarf2_per_cu_data
*per_cu
;
19609 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
19611 /* cu->dependencies references may not yet have been ever read if QUIT aborts
19612 reading of the chain. As such dependencies remain valid it is not much
19613 useful to track and undo them during QUIT cleanups. */
19614 if (per_cu
->cu
== NULL
)
19617 if (per_cu
->cu
->mark
)
19619 per_cu
->cu
->mark
= 1;
19621 if (per_cu
->cu
->dependencies
!= NULL
)
19622 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
19627 /* Set the mark field in CU and in every other compilation unit in the
19628 cache that we must keep because we are keeping CU. */
19631 dwarf2_mark (struct dwarf2_cu
*cu
)
19636 if (cu
->dependencies
!= NULL
)
19637 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
19641 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
19645 per_cu
->cu
->mark
= 0;
19646 per_cu
= per_cu
->cu
->read_in_chain
;
19650 /* Trivial hash function for partial_die_info: the hash value of a DIE
19651 is its offset in .debug_info for this objfile. */
19654 partial_die_hash (const void *item
)
19656 const struct partial_die_info
*part_die
= item
;
19658 return part_die
->offset
.sect_off
;
19661 /* Trivial comparison function for partial_die_info structures: two DIEs
19662 are equal if they have the same offset. */
19665 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
19667 const struct partial_die_info
*part_die_lhs
= item_lhs
;
19668 const struct partial_die_info
*part_die_rhs
= item_rhs
;
19670 return part_die_lhs
->offset
.sect_off
== part_die_rhs
->offset
.sect_off
;
19673 static struct cmd_list_element
*set_dwarf2_cmdlist
;
19674 static struct cmd_list_element
*show_dwarf2_cmdlist
;
19677 set_dwarf2_cmd (char *args
, int from_tty
)
19679 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
19683 show_dwarf2_cmd (char *args
, int from_tty
)
19685 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
19688 /* Free data associated with OBJFILE, if necessary. */
19691 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
19693 struct dwarf2_per_objfile
*data
= d
;
19696 for (ix
= 0; ix
< dwarf2_per_objfile
->n_comp_units
; ++ix
)
19697 VEC_free (dwarf2_per_cu_ptr
,
19698 dwarf2_per_objfile
->all_comp_units
[ix
]->imported_symtabs
);
19700 for (ix
= 0; ix
< dwarf2_per_objfile
->n_type_units
; ++ix
)
19701 VEC_free (dwarf2_per_cu_ptr
,
19702 dwarf2_per_objfile
->all_type_units
[ix
]->per_cu
.imported_symtabs
);
19704 VEC_free (dwarf2_section_info_def
, data
->types
);
19706 if (data
->dwo_files
)
19707 free_dwo_files (data
->dwo_files
, objfile
);
19709 if (data
->dwz_file
&& data
->dwz_file
->dwz_bfd
)
19710 gdb_bfd_unref (data
->dwz_file
->dwz_bfd
);
19714 /* The "save gdb-index" command. */
19716 /* The contents of the hash table we create when building the string
19718 struct strtab_entry
19720 offset_type offset
;
19724 /* Hash function for a strtab_entry.
19726 Function is used only during write_hash_table so no index format backward
19727 compatibility is needed. */
19730 hash_strtab_entry (const void *e
)
19732 const struct strtab_entry
*entry
= e
;
19733 return mapped_index_string_hash (INT_MAX
, entry
->str
);
19736 /* Equality function for a strtab_entry. */
19739 eq_strtab_entry (const void *a
, const void *b
)
19741 const struct strtab_entry
*ea
= a
;
19742 const struct strtab_entry
*eb
= b
;
19743 return !strcmp (ea
->str
, eb
->str
);
19746 /* Create a strtab_entry hash table. */
19749 create_strtab (void)
19751 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
19752 xfree
, xcalloc
, xfree
);
19755 /* Add a string to the constant pool. Return the string's offset in
19759 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
19762 struct strtab_entry entry
;
19763 struct strtab_entry
*result
;
19766 slot
= htab_find_slot (table
, &entry
, INSERT
);
19771 result
= XNEW (struct strtab_entry
);
19772 result
->offset
= obstack_object_size (cpool
);
19774 obstack_grow_str0 (cpool
, str
);
19777 return result
->offset
;
19780 /* An entry in the symbol table. */
19781 struct symtab_index_entry
19783 /* The name of the symbol. */
19785 /* The offset of the name in the constant pool. */
19786 offset_type index_offset
;
19787 /* A sorted vector of the indices of all the CUs that hold an object
19789 VEC (offset_type
) *cu_indices
;
19792 /* The symbol table. This is a power-of-2-sized hash table. */
19793 struct mapped_symtab
19795 offset_type n_elements
;
19797 struct symtab_index_entry
**data
;
19800 /* Hash function for a symtab_index_entry. */
19803 hash_symtab_entry (const void *e
)
19805 const struct symtab_index_entry
*entry
= e
;
19806 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
19807 sizeof (offset_type
) * VEC_length (offset_type
,
19808 entry
->cu_indices
),
19812 /* Equality function for a symtab_index_entry. */
19815 eq_symtab_entry (const void *a
, const void *b
)
19817 const struct symtab_index_entry
*ea
= a
;
19818 const struct symtab_index_entry
*eb
= b
;
19819 int len
= VEC_length (offset_type
, ea
->cu_indices
);
19820 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
19822 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
19823 VEC_address (offset_type
, eb
->cu_indices
),
19824 sizeof (offset_type
) * len
);
19827 /* Destroy a symtab_index_entry. */
19830 delete_symtab_entry (void *p
)
19832 struct symtab_index_entry
*entry
= p
;
19833 VEC_free (offset_type
, entry
->cu_indices
);
19837 /* Create a hash table holding symtab_index_entry objects. */
19840 create_symbol_hash_table (void)
19842 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
19843 delete_symtab_entry
, xcalloc
, xfree
);
19846 /* Create a new mapped symtab object. */
19848 static struct mapped_symtab
*
19849 create_mapped_symtab (void)
19851 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
19852 symtab
->n_elements
= 0;
19853 symtab
->size
= 1024;
19854 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
19858 /* Destroy a mapped_symtab. */
19861 cleanup_mapped_symtab (void *p
)
19863 struct mapped_symtab
*symtab
= p
;
19864 /* The contents of the array are freed when the other hash table is
19866 xfree (symtab
->data
);
19870 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
19873 Function is used only during write_hash_table so no index format backward
19874 compatibility is needed. */
19876 static struct symtab_index_entry
**
19877 find_slot (struct mapped_symtab
*symtab
, const char *name
)
19879 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
19881 index
= hash
& (symtab
->size
- 1);
19882 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
19886 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
19887 return &symtab
->data
[index
];
19888 index
= (index
+ step
) & (symtab
->size
- 1);
19892 /* Expand SYMTAB's hash table. */
19895 hash_expand (struct mapped_symtab
*symtab
)
19897 offset_type old_size
= symtab
->size
;
19899 struct symtab_index_entry
**old_entries
= symtab
->data
;
19902 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
19904 for (i
= 0; i
< old_size
; ++i
)
19906 if (old_entries
[i
])
19908 struct symtab_index_entry
**slot
= find_slot (symtab
,
19909 old_entries
[i
]->name
);
19910 *slot
= old_entries
[i
];
19914 xfree (old_entries
);
19917 /* Add an entry to SYMTAB. NAME is the name of the symbol.
19918 CU_INDEX is the index of the CU in which the symbol appears.
19919 IS_STATIC is one if the symbol is static, otherwise zero (global). */
19922 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
19923 int is_static
, gdb_index_symbol_kind kind
,
19924 offset_type cu_index
)
19926 struct symtab_index_entry
**slot
;
19927 offset_type cu_index_and_attrs
;
19929 ++symtab
->n_elements
;
19930 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
19931 hash_expand (symtab
);
19933 slot
= find_slot (symtab
, name
);
19936 *slot
= XNEW (struct symtab_index_entry
);
19937 (*slot
)->name
= name
;
19938 /* index_offset is set later. */
19939 (*slot
)->cu_indices
= NULL
;
19942 cu_index_and_attrs
= 0;
19943 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs
, cu_index
);
19944 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs
, is_static
);
19945 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs
, kind
);
19947 /* We don't want to record an index value twice as we want to avoid the
19949 We process all global symbols and then all static symbols
19950 (which would allow us to avoid the duplication by only having to check
19951 the last entry pushed), but a symbol could have multiple kinds in one CU.
19952 To keep things simple we don't worry about the duplication here and
19953 sort and uniqufy the list after we've processed all symbols. */
19954 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index_and_attrs
);
19957 /* qsort helper routine for uniquify_cu_indices. */
19960 offset_type_compare (const void *ap
, const void *bp
)
19962 offset_type a
= *(offset_type
*) ap
;
19963 offset_type b
= *(offset_type
*) bp
;
19965 return (a
> b
) - (b
> a
);
19968 /* Sort and remove duplicates of all symbols' cu_indices lists. */
19971 uniquify_cu_indices (struct mapped_symtab
*symtab
)
19975 for (i
= 0; i
< symtab
->size
; ++i
)
19977 struct symtab_index_entry
*entry
= symtab
->data
[i
];
19980 && entry
->cu_indices
!= NULL
)
19982 unsigned int next_to_insert
, next_to_check
;
19983 offset_type last_value
;
19985 qsort (VEC_address (offset_type
, entry
->cu_indices
),
19986 VEC_length (offset_type
, entry
->cu_indices
),
19987 sizeof (offset_type
), offset_type_compare
);
19989 last_value
= VEC_index (offset_type
, entry
->cu_indices
, 0);
19990 next_to_insert
= 1;
19991 for (next_to_check
= 1;
19992 next_to_check
< VEC_length (offset_type
, entry
->cu_indices
);
19995 if (VEC_index (offset_type
, entry
->cu_indices
, next_to_check
)
19998 last_value
= VEC_index (offset_type
, entry
->cu_indices
,
20000 VEC_replace (offset_type
, entry
->cu_indices
, next_to_insert
,
20005 VEC_truncate (offset_type
, entry
->cu_indices
, next_to_insert
);
20010 /* Add a vector of indices to the constant pool. */
20013 add_indices_to_cpool (htab_t symbol_hash_table
, struct obstack
*cpool
,
20014 struct symtab_index_entry
*entry
)
20018 slot
= htab_find_slot (symbol_hash_table
, entry
, INSERT
);
20021 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
20022 offset_type val
= MAYBE_SWAP (len
);
20027 entry
->index_offset
= obstack_object_size (cpool
);
20029 obstack_grow (cpool
, &val
, sizeof (val
));
20031 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
20034 val
= MAYBE_SWAP (iter
);
20035 obstack_grow (cpool
, &val
, sizeof (val
));
20040 struct symtab_index_entry
*old_entry
= *slot
;
20041 entry
->index_offset
= old_entry
->index_offset
;
20044 return entry
->index_offset
;
20047 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
20048 constant pool entries going into the obstack CPOOL. */
20051 write_hash_table (struct mapped_symtab
*symtab
,
20052 struct obstack
*output
, struct obstack
*cpool
)
20055 htab_t symbol_hash_table
;
20058 symbol_hash_table
= create_symbol_hash_table ();
20059 str_table
= create_strtab ();
20061 /* We add all the index vectors to the constant pool first, to
20062 ensure alignment is ok. */
20063 for (i
= 0; i
< symtab
->size
; ++i
)
20065 if (symtab
->data
[i
])
20066 add_indices_to_cpool (symbol_hash_table
, cpool
, symtab
->data
[i
]);
20069 /* Now write out the hash table. */
20070 for (i
= 0; i
< symtab
->size
; ++i
)
20072 offset_type str_off
, vec_off
;
20074 if (symtab
->data
[i
])
20076 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
20077 vec_off
= symtab
->data
[i
]->index_offset
;
20081 /* While 0 is a valid constant pool index, it is not valid
20082 to have 0 for both offsets. */
20087 str_off
= MAYBE_SWAP (str_off
);
20088 vec_off
= MAYBE_SWAP (vec_off
);
20090 obstack_grow (output
, &str_off
, sizeof (str_off
));
20091 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
20094 htab_delete (str_table
);
20095 htab_delete (symbol_hash_table
);
20098 /* Struct to map psymtab to CU index in the index file. */
20099 struct psymtab_cu_index_map
20101 struct partial_symtab
*psymtab
;
20102 unsigned int cu_index
;
20106 hash_psymtab_cu_index (const void *item
)
20108 const struct psymtab_cu_index_map
*map
= item
;
20110 return htab_hash_pointer (map
->psymtab
);
20114 eq_psymtab_cu_index (const void *item_lhs
, const void *item_rhs
)
20116 const struct psymtab_cu_index_map
*lhs
= item_lhs
;
20117 const struct psymtab_cu_index_map
*rhs
= item_rhs
;
20119 return lhs
->psymtab
== rhs
->psymtab
;
20122 /* Helper struct for building the address table. */
20123 struct addrmap_index_data
20125 struct objfile
*objfile
;
20126 struct obstack
*addr_obstack
;
20127 htab_t cu_index_htab
;
20129 /* Non-zero if the previous_* fields are valid.
20130 We can't write an entry until we see the next entry (since it is only then
20131 that we know the end of the entry). */
20132 int previous_valid
;
20133 /* Index of the CU in the table of all CUs in the index file. */
20134 unsigned int previous_cu_index
;
20135 /* Start address of the CU. */
20136 CORE_ADDR previous_cu_start
;
20139 /* Write an address entry to OBSTACK. */
20142 add_address_entry (struct objfile
*objfile
, struct obstack
*obstack
,
20143 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
20145 offset_type cu_index_to_write
;
20147 CORE_ADDR baseaddr
;
20149 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
20151 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
20152 obstack_grow (obstack
, addr
, 8);
20153 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
20154 obstack_grow (obstack
, addr
, 8);
20155 cu_index_to_write
= MAYBE_SWAP (cu_index
);
20156 obstack_grow (obstack
, &cu_index_to_write
, sizeof (offset_type
));
20159 /* Worker function for traversing an addrmap to build the address table. */
20162 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
20164 struct addrmap_index_data
*data
= datap
;
20165 struct partial_symtab
*pst
= obj
;
20167 if (data
->previous_valid
)
20168 add_address_entry (data
->objfile
, data
->addr_obstack
,
20169 data
->previous_cu_start
, start_addr
,
20170 data
->previous_cu_index
);
20172 data
->previous_cu_start
= start_addr
;
20175 struct psymtab_cu_index_map find_map
, *map
;
20176 find_map
.psymtab
= pst
;
20177 map
= htab_find (data
->cu_index_htab
, &find_map
);
20178 gdb_assert (map
!= NULL
);
20179 data
->previous_cu_index
= map
->cu_index
;
20180 data
->previous_valid
= 1;
20183 data
->previous_valid
= 0;
20188 /* Write OBJFILE's address map to OBSTACK.
20189 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
20190 in the index file. */
20193 write_address_map (struct objfile
*objfile
, struct obstack
*obstack
,
20194 htab_t cu_index_htab
)
20196 struct addrmap_index_data addrmap_index_data
;
20198 /* When writing the address table, we have to cope with the fact that
20199 the addrmap iterator only provides the start of a region; we have to
20200 wait until the next invocation to get the start of the next region. */
20202 addrmap_index_data
.objfile
= objfile
;
20203 addrmap_index_data
.addr_obstack
= obstack
;
20204 addrmap_index_data
.cu_index_htab
= cu_index_htab
;
20205 addrmap_index_data
.previous_valid
= 0;
20207 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
20208 &addrmap_index_data
);
20210 /* It's highly unlikely the last entry (end address = 0xff...ff)
20211 is valid, but we should still handle it.
20212 The end address is recorded as the start of the next region, but that
20213 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
20215 if (addrmap_index_data
.previous_valid
)
20216 add_address_entry (objfile
, obstack
,
20217 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
20218 addrmap_index_data
.previous_cu_index
);
20221 /* Return the symbol kind of PSYM. */
20223 static gdb_index_symbol_kind
20224 symbol_kind (struct partial_symbol
*psym
)
20226 domain_enum domain
= PSYMBOL_DOMAIN (psym
);
20227 enum address_class aclass
= PSYMBOL_CLASS (psym
);
20235 return GDB_INDEX_SYMBOL_KIND_FUNCTION
;
20237 return GDB_INDEX_SYMBOL_KIND_TYPE
;
20239 case LOC_CONST_BYTES
:
20240 case LOC_OPTIMIZED_OUT
:
20242 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
20244 /* Note: It's currently impossible to recognize psyms as enum values
20245 short of reading the type info. For now punt. */
20246 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
20248 /* There are other LOC_FOO values that one might want to classify
20249 as variables, but dwarf2read.c doesn't currently use them. */
20250 return GDB_INDEX_SYMBOL_KIND_OTHER
;
20252 case STRUCT_DOMAIN
:
20253 return GDB_INDEX_SYMBOL_KIND_TYPE
;
20255 return GDB_INDEX_SYMBOL_KIND_OTHER
;
20259 /* Add a list of partial symbols to SYMTAB. */
20262 write_psymbols (struct mapped_symtab
*symtab
,
20264 struct partial_symbol
**psymp
,
20266 offset_type cu_index
,
20269 for (; count
-- > 0; ++psymp
)
20271 struct partial_symbol
*psym
= *psymp
;
20274 if (SYMBOL_LANGUAGE (psym
) == language_ada
)
20275 error (_("Ada is not currently supported by the index"));
20277 /* Only add a given psymbol once. */
20278 slot
= htab_find_slot (psyms_seen
, psym
, INSERT
);
20281 gdb_index_symbol_kind kind
= symbol_kind (psym
);
20284 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (psym
),
20285 is_static
, kind
, cu_index
);
20290 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
20291 exception if there is an error. */
20294 write_obstack (FILE *file
, struct obstack
*obstack
)
20296 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
20298 != obstack_object_size (obstack
))
20299 error (_("couldn't data write to file"));
20302 /* Unlink a file if the argument is not NULL. */
20305 unlink_if_set (void *p
)
20307 char **filename
= p
;
20309 unlink (*filename
);
20312 /* A helper struct used when iterating over debug_types. */
20313 struct signatured_type_index_data
20315 struct objfile
*objfile
;
20316 struct mapped_symtab
*symtab
;
20317 struct obstack
*types_list
;
20322 /* A helper function that writes a single signatured_type to an
20326 write_one_signatured_type (void **slot
, void *d
)
20328 struct signatured_type_index_data
*info
= d
;
20329 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
20330 struct dwarf2_per_cu_data
*per_cu
= &entry
->per_cu
;
20331 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
20334 write_psymbols (info
->symtab
,
20336 info
->objfile
->global_psymbols
.list
20337 + psymtab
->globals_offset
,
20338 psymtab
->n_global_syms
, info
->cu_index
,
20340 write_psymbols (info
->symtab
,
20342 info
->objfile
->static_psymbols
.list
20343 + psymtab
->statics_offset
,
20344 psymtab
->n_static_syms
, info
->cu_index
,
20347 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
20348 entry
->per_cu
.offset
.sect_off
);
20349 obstack_grow (info
->types_list
, val
, 8);
20350 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
20351 entry
->type_offset_in_tu
.cu_off
);
20352 obstack_grow (info
->types_list
, val
, 8);
20353 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
20354 obstack_grow (info
->types_list
, val
, 8);
20361 /* Recurse into all "included" dependencies and write their symbols as
20362 if they appeared in this psymtab. */
20365 recursively_write_psymbols (struct objfile
*objfile
,
20366 struct partial_symtab
*psymtab
,
20367 struct mapped_symtab
*symtab
,
20369 offset_type cu_index
)
20373 for (i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
20374 if (psymtab
->dependencies
[i
]->user
!= NULL
)
20375 recursively_write_psymbols (objfile
, psymtab
->dependencies
[i
],
20376 symtab
, psyms_seen
, cu_index
);
20378 write_psymbols (symtab
,
20380 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
20381 psymtab
->n_global_syms
, cu_index
,
20383 write_psymbols (symtab
,
20385 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
20386 psymtab
->n_static_syms
, cu_index
,
20390 /* Create an index file for OBJFILE in the directory DIR. */
20393 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
20395 struct cleanup
*cleanup
;
20396 char *filename
, *cleanup_filename
;
20397 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
20398 struct obstack cu_list
, types_cu_list
;
20401 struct mapped_symtab
*symtab
;
20402 offset_type val
, size_of_contents
, total_len
;
20405 htab_t cu_index_htab
;
20406 struct psymtab_cu_index_map
*psymtab_cu_index_map
;
20408 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
20411 if (dwarf2_per_objfile
->using_index
)
20412 error (_("Cannot use an index to create the index"));
20414 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
20415 error (_("Cannot make an index when the file has multiple .debug_types sections"));
20417 if (stat (objfile
->name
, &st
) < 0)
20418 perror_with_name (objfile
->name
);
20420 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile
->name
),
20421 INDEX_SUFFIX
, (char *) NULL
);
20422 cleanup
= make_cleanup (xfree
, filename
);
20424 out_file
= fopen (filename
, "wb");
20426 error (_("Can't open `%s' for writing"), filename
);
20428 cleanup_filename
= filename
;
20429 make_cleanup (unlink_if_set
, &cleanup_filename
);
20431 symtab
= create_mapped_symtab ();
20432 make_cleanup (cleanup_mapped_symtab
, symtab
);
20434 obstack_init (&addr_obstack
);
20435 make_cleanup_obstack_free (&addr_obstack
);
20437 obstack_init (&cu_list
);
20438 make_cleanup_obstack_free (&cu_list
);
20440 obstack_init (&types_cu_list
);
20441 make_cleanup_obstack_free (&types_cu_list
);
20443 psyms_seen
= htab_create_alloc (100, htab_hash_pointer
, htab_eq_pointer
,
20444 NULL
, xcalloc
, xfree
);
20445 make_cleanup_htab_delete (psyms_seen
);
20447 /* While we're scanning CU's create a table that maps a psymtab pointer
20448 (which is what addrmap records) to its index (which is what is recorded
20449 in the index file). This will later be needed to write the address
20451 cu_index_htab
= htab_create_alloc (100,
20452 hash_psymtab_cu_index
,
20453 eq_psymtab_cu_index
,
20454 NULL
, xcalloc
, xfree
);
20455 make_cleanup_htab_delete (cu_index_htab
);
20456 psymtab_cu_index_map
= (struct psymtab_cu_index_map
*)
20457 xmalloc (sizeof (struct psymtab_cu_index_map
)
20458 * dwarf2_per_objfile
->n_comp_units
);
20459 make_cleanup (xfree
, psymtab_cu_index_map
);
20461 /* The CU list is already sorted, so we don't need to do additional
20462 work here. Also, the debug_types entries do not appear in
20463 all_comp_units, but only in their own hash table. */
20464 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
20466 struct dwarf2_per_cu_data
*per_cu
20467 = dwarf2_per_objfile
->all_comp_units
[i
];
20468 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
20470 struct psymtab_cu_index_map
*map
;
20473 if (psymtab
->user
== NULL
)
20474 recursively_write_psymbols (objfile
, psymtab
, symtab
, psyms_seen
, i
);
20476 map
= &psymtab_cu_index_map
[i
];
20477 map
->psymtab
= psymtab
;
20479 slot
= htab_find_slot (cu_index_htab
, map
, INSERT
);
20480 gdb_assert (slot
!= NULL
);
20481 gdb_assert (*slot
== NULL
);
20484 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
20485 per_cu
->offset
.sect_off
);
20486 obstack_grow (&cu_list
, val
, 8);
20487 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
20488 obstack_grow (&cu_list
, val
, 8);
20491 /* Dump the address map. */
20492 write_address_map (objfile
, &addr_obstack
, cu_index_htab
);
20494 /* Write out the .debug_type entries, if any. */
20495 if (dwarf2_per_objfile
->signatured_types
)
20497 struct signatured_type_index_data sig_data
;
20499 sig_data
.objfile
= objfile
;
20500 sig_data
.symtab
= symtab
;
20501 sig_data
.types_list
= &types_cu_list
;
20502 sig_data
.psyms_seen
= psyms_seen
;
20503 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
20504 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
20505 write_one_signatured_type
, &sig_data
);
20508 /* Now that we've processed all symbols we can shrink their cu_indices
20510 uniquify_cu_indices (symtab
);
20512 obstack_init (&constant_pool
);
20513 make_cleanup_obstack_free (&constant_pool
);
20514 obstack_init (&symtab_obstack
);
20515 make_cleanup_obstack_free (&symtab_obstack
);
20516 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
20518 obstack_init (&contents
);
20519 make_cleanup_obstack_free (&contents
);
20520 size_of_contents
= 6 * sizeof (offset_type
);
20521 total_len
= size_of_contents
;
20523 /* The version number. */
20524 val
= MAYBE_SWAP (8);
20525 obstack_grow (&contents
, &val
, sizeof (val
));
20527 /* The offset of the CU list from the start of the file. */
20528 val
= MAYBE_SWAP (total_len
);
20529 obstack_grow (&contents
, &val
, sizeof (val
));
20530 total_len
+= obstack_object_size (&cu_list
);
20532 /* The offset of the types CU list from the start of the file. */
20533 val
= MAYBE_SWAP (total_len
);
20534 obstack_grow (&contents
, &val
, sizeof (val
));
20535 total_len
+= obstack_object_size (&types_cu_list
);
20537 /* The offset of the address table from the start of the file. */
20538 val
= MAYBE_SWAP (total_len
);
20539 obstack_grow (&contents
, &val
, sizeof (val
));
20540 total_len
+= obstack_object_size (&addr_obstack
);
20542 /* The offset of the symbol table from the start of the file. */
20543 val
= MAYBE_SWAP (total_len
);
20544 obstack_grow (&contents
, &val
, sizeof (val
));
20545 total_len
+= obstack_object_size (&symtab_obstack
);
20547 /* The offset of the constant pool from the start of the file. */
20548 val
= MAYBE_SWAP (total_len
);
20549 obstack_grow (&contents
, &val
, sizeof (val
));
20550 total_len
+= obstack_object_size (&constant_pool
);
20552 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
20554 write_obstack (out_file
, &contents
);
20555 write_obstack (out_file
, &cu_list
);
20556 write_obstack (out_file
, &types_cu_list
);
20557 write_obstack (out_file
, &addr_obstack
);
20558 write_obstack (out_file
, &symtab_obstack
);
20559 write_obstack (out_file
, &constant_pool
);
20563 /* We want to keep the file, so we set cleanup_filename to NULL
20564 here. See unlink_if_set. */
20565 cleanup_filename
= NULL
;
20567 do_cleanups (cleanup
);
20570 /* Implementation of the `save gdb-index' command.
20572 Note that the file format used by this command is documented in the
20573 GDB manual. Any changes here must be documented there. */
20576 save_gdb_index_command (char *arg
, int from_tty
)
20578 struct objfile
*objfile
;
20581 error (_("usage: save gdb-index DIRECTORY"));
20583 ALL_OBJFILES (objfile
)
20587 /* If the objfile does not correspond to an actual file, skip it. */
20588 if (stat (objfile
->name
, &st
) < 0)
20591 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
20592 if (dwarf2_per_objfile
)
20594 volatile struct gdb_exception except
;
20596 TRY_CATCH (except
, RETURN_MASK_ERROR
)
20598 write_psymtabs_to_index (objfile
, arg
);
20600 if (except
.reason
< 0)
20601 exception_fprintf (gdb_stderr
, except
,
20602 _("Error while writing index for `%s': "),
20610 int dwarf2_always_disassemble
;
20613 show_dwarf2_always_disassemble (struct ui_file
*file
, int from_tty
,
20614 struct cmd_list_element
*c
, const char *value
)
20616 fprintf_filtered (file
,
20617 _("Whether to always disassemble "
20618 "DWARF expressions is %s.\n"),
20623 show_check_physname (struct ui_file
*file
, int from_tty
,
20624 struct cmd_list_element
*c
, const char *value
)
20626 fprintf_filtered (file
,
20627 _("Whether to check \"physname\" is %s.\n"),
20631 void _initialize_dwarf2_read (void);
20634 _initialize_dwarf2_read (void)
20636 struct cmd_list_element
*c
;
20638 dwarf2_objfile_data_key
20639 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
20641 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
20642 Set DWARF 2 specific variables.\n\
20643 Configure DWARF 2 variables such as the cache size"),
20644 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
20645 0/*allow-unknown*/, &maintenance_set_cmdlist
);
20647 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
20648 Show DWARF 2 specific variables\n\
20649 Show DWARF 2 variables such as the cache size"),
20650 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
20651 0/*allow-unknown*/, &maintenance_show_cmdlist
);
20653 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
20654 &dwarf2_max_cache_age
, _("\
20655 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
20656 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
20657 A higher limit means that cached compilation units will be stored\n\
20658 in memory longer, and more total memory will be used. Zero disables\n\
20659 caching, which can slow down startup."),
20661 show_dwarf2_max_cache_age
,
20662 &set_dwarf2_cmdlist
,
20663 &show_dwarf2_cmdlist
);
20665 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
20666 &dwarf2_always_disassemble
, _("\
20667 Set whether `info address' always disassembles DWARF expressions."), _("\
20668 Show whether `info address' always disassembles DWARF expressions."), _("\
20669 When enabled, DWARF expressions are always printed in an assembly-like\n\
20670 syntax. When disabled, expressions will be printed in a more\n\
20671 conversational style, when possible."),
20673 show_dwarf2_always_disassemble
,
20674 &set_dwarf2_cmdlist
,
20675 &show_dwarf2_cmdlist
);
20677 add_setshow_boolean_cmd ("dwarf2-read", no_class
, &dwarf2_read_debug
, _("\
20678 Set debugging of the dwarf2 reader."), _("\
20679 Show debugging of the dwarf2 reader."), _("\
20680 When enabled, debugging messages are printed during dwarf2 reading\n\
20681 and symtab expansion."),
20684 &setdebuglist
, &showdebuglist
);
20686 add_setshow_zuinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
20687 Set debugging of the dwarf2 DIE reader."), _("\
20688 Show debugging of the dwarf2 DIE reader."), _("\
20689 When enabled (non-zero), DIEs are dumped after they are read in.\n\
20690 The value is the maximum depth to print."),
20693 &setdebuglist
, &showdebuglist
);
20695 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
20696 Set cross-checking of \"physname\" code against demangler."), _("\
20697 Show cross-checking of \"physname\" code against demangler."), _("\
20698 When enabled, GDB's internal \"physname\" code is checked against\n\
20700 NULL
, show_check_physname
,
20701 &setdebuglist
, &showdebuglist
);
20703 add_setshow_boolean_cmd ("use-deprecated-index-sections",
20704 no_class
, &use_deprecated_index_sections
, _("\
20705 Set whether to use deprecated gdb_index sections."), _("\
20706 Show whether to use deprecated gdb_index sections."), _("\
20707 When enabled, deprecated .gdb_index sections are used anyway.\n\
20708 Normally they are ignored either because of a missing feature or\n\
20709 performance issue.\n\
20710 Warning: This option must be enabled before gdb reads the file."),
20713 &setlist
, &showlist
);
20715 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
20717 Save a gdb-index file.\n\
20718 Usage: save gdb-index DIRECTORY"),
20720 set_cmd_completer (c
, filename_completer
);