1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994-2017 Free Software Foundation, Inc.
5 Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
6 Inc. with support from Florida State University (under contract
7 with the Ada Joint Program Office), and Silicon Graphics, Inc.
8 Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
9 based on Fred Fish's (Cygnus Support) implementation of DWARF 1
12 This file is part of GDB.
14 This program is free software; you can redistribute it and/or modify
15 it under the terms of the GNU General Public License as published by
16 the Free Software Foundation; either version 3 of the License, or
17 (at your option) any later version.
19 This program is distributed in the hope that it will be useful,
20 but WITHOUT ANY WARRANTY; without even the implied warranty of
21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 GNU General Public License for more details.
24 You should have received a copy of the GNU General Public License
25 along with this program. If not, see <http://www.gnu.org/licenses/>. */
27 /* FIXME: Various die-reading functions need to be more careful with
28 reading off the end of the section.
29 E.g., load_partial_dies, read_partial_die. */
40 #include "gdb-demangle.h"
41 #include "expression.h"
42 #include "filenames.h" /* for DOSish file names */
45 #include "complaints.h"
47 #include "dwarf2expr.h"
48 #include "dwarf2loc.h"
49 #include "cp-support.h"
55 #include "typeprint.h"
58 #include "completer.h"
63 #include "gdbcore.h" /* for gnutarget */
64 #include "gdb/gdb-index.h"
69 #include "filestuff.h"
71 #include "namespace.h"
72 #include "common/gdb_unlinker.h"
75 #include <sys/types.h>
78 typedef struct symbol
*symbolp
;
81 /* When == 1, print basic high level tracing messages.
82 When > 1, be more verbose.
83 This is in contrast to the low level DIE reading of dwarf_die_debug. */
84 static unsigned int dwarf_read_debug
= 0;
86 /* When non-zero, dump DIEs after they are read in. */
87 static unsigned int dwarf_die_debug
= 0;
89 /* When non-zero, dump line number entries as they are read in. */
90 static unsigned int dwarf_line_debug
= 0;
92 /* When non-zero, cross-check physname against demangler. */
93 static int check_physname
= 0;
95 /* When non-zero, do not reject deprecated .gdb_index sections. */
96 static int use_deprecated_index_sections
= 0;
98 static const struct objfile_data
*dwarf2_objfile_data_key
;
100 /* The "aclass" indices for various kinds of computed DWARF symbols. */
102 static int dwarf2_locexpr_index
;
103 static int dwarf2_loclist_index
;
104 static int dwarf2_locexpr_block_index
;
105 static int dwarf2_loclist_block_index
;
107 /* A descriptor for dwarf sections.
109 S.ASECTION, SIZE are typically initialized when the objfile is first
110 scanned. BUFFER, READIN are filled in later when the section is read.
111 If the section contained compressed data then SIZE is updated to record
112 the uncompressed size of the section.
114 DWP file format V2 introduces a wrinkle that is easiest to handle by
115 creating the concept of virtual sections contained within a real section.
116 In DWP V2 the sections of the input DWO files are concatenated together
117 into one section, but section offsets are kept relative to the original
119 If this is a virtual dwp-v2 section, S.CONTAINING_SECTION is a backlink to
120 the real section this "virtual" section is contained in, and BUFFER,SIZE
121 describe the virtual section. */
123 struct dwarf2_section_info
127 /* If this is a real section, the bfd section. */
129 /* If this is a virtual section, pointer to the containing ("real")
131 struct dwarf2_section_info
*containing_section
;
133 /* Pointer to section data, only valid if readin. */
134 const gdb_byte
*buffer
;
135 /* The size of the section, real or virtual. */
137 /* If this is a virtual section, the offset in the real section.
138 Only valid if is_virtual. */
139 bfd_size_type virtual_offset
;
140 /* True if we have tried to read this section. */
142 /* True if this is a virtual section, False otherwise.
143 This specifies which of s.section and s.containing_section to use. */
147 typedef struct dwarf2_section_info dwarf2_section_info_def
;
148 DEF_VEC_O (dwarf2_section_info_def
);
150 /* All offsets in the index are of this type. It must be
151 architecture-independent. */
152 typedef uint32_t offset_type
;
154 DEF_VEC_I (offset_type
);
156 /* Ensure only legit values are used. */
157 #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \
159 gdb_assert ((unsigned int) (value) <= 1); \
160 GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \
163 /* Ensure only legit values are used. */
164 #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \
166 gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \
167 && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \
168 GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \
171 /* Ensure we don't use more than the alloted nuber of bits for the CU. */
172 #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \
174 gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \
175 GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \
178 /* A description of the mapped index. The file format is described in
179 a comment by the code that writes the index. */
182 /* Index data format version. */
185 /* The total length of the buffer. */
188 /* A pointer to the address table data. */
189 const gdb_byte
*address_table
;
191 /* Size of the address table data in bytes. */
192 offset_type address_table_size
;
194 /* The symbol table, implemented as a hash table. */
195 const offset_type
*symbol_table
;
197 /* Size in slots, each slot is 2 offset_types. */
198 offset_type symbol_table_slots
;
200 /* A pointer to the constant pool. */
201 const char *constant_pool
;
204 typedef struct dwarf2_per_cu_data
*dwarf2_per_cu_ptr
;
205 DEF_VEC_P (dwarf2_per_cu_ptr
);
209 int nr_uniq_abbrev_tables
;
211 int nr_symtab_sharers
;
212 int nr_stmt_less_type_units
;
213 int nr_all_type_units_reallocs
;
216 /* Collection of data recorded per objfile.
217 This hangs off of dwarf2_objfile_data_key. */
219 struct dwarf2_per_objfile
221 struct dwarf2_section_info info
;
222 struct dwarf2_section_info abbrev
;
223 struct dwarf2_section_info line
;
224 struct dwarf2_section_info loc
;
225 struct dwarf2_section_info loclists
;
226 struct dwarf2_section_info macinfo
;
227 struct dwarf2_section_info macro
;
228 struct dwarf2_section_info str
;
229 struct dwarf2_section_info line_str
;
230 struct dwarf2_section_info ranges
;
231 struct dwarf2_section_info rnglists
;
232 struct dwarf2_section_info addr
;
233 struct dwarf2_section_info frame
;
234 struct dwarf2_section_info eh_frame
;
235 struct dwarf2_section_info gdb_index
;
237 VEC (dwarf2_section_info_def
) *types
;
240 struct objfile
*objfile
;
242 /* Table of all the compilation units. This is used to locate
243 the target compilation unit of a particular reference. */
244 struct dwarf2_per_cu_data
**all_comp_units
;
246 /* The number of compilation units in ALL_COMP_UNITS. */
249 /* The number of .debug_types-related CUs. */
252 /* The number of elements allocated in all_type_units.
253 If there are skeleton-less TUs, we add them to all_type_units lazily. */
254 int n_allocated_type_units
;
256 /* The .debug_types-related CUs (TUs).
257 This is stored in malloc space because we may realloc it. */
258 struct signatured_type
**all_type_units
;
260 /* Table of struct type_unit_group objects.
261 The hash key is the DW_AT_stmt_list value. */
262 htab_t type_unit_groups
;
264 /* A table mapping .debug_types signatures to its signatured_type entry.
265 This is NULL if the .debug_types section hasn't been read in yet. */
266 htab_t signatured_types
;
268 /* Type unit statistics, to see how well the scaling improvements
270 struct tu_stats tu_stats
;
272 /* A chain of compilation units that are currently read in, so that
273 they can be freed later. */
274 struct dwarf2_per_cu_data
*read_in_chain
;
276 /* A table mapping DW_AT_dwo_name values to struct dwo_file objects.
277 This is NULL if the table hasn't been allocated yet. */
280 /* Non-zero if we've check for whether there is a DWP file. */
283 /* The DWP file if there is one, or NULL. */
284 struct dwp_file
*dwp_file
;
286 /* The shared '.dwz' file, if one exists. This is used when the
287 original data was compressed using 'dwz -m'. */
288 struct dwz_file
*dwz_file
;
290 /* A flag indicating wether this objfile has a section loaded at a
292 int has_section_at_zero
;
294 /* True if we are using the mapped index,
295 or we are faking it for OBJF_READNOW's sake. */
296 unsigned char using_index
;
298 /* The mapped index, or NULL if .gdb_index is missing or not being used. */
299 struct mapped_index
*index_table
;
301 /* When using index_table, this keeps track of all quick_file_names entries.
302 TUs typically share line table entries with a CU, so we maintain a
303 separate table of all line table entries to support the sharing.
304 Note that while there can be way more TUs than CUs, we've already
305 sorted all the TUs into "type unit groups", grouped by their
306 DW_AT_stmt_list value. Therefore the only sharing done here is with a
307 CU and its associated TU group if there is one. */
308 htab_t quick_file_names_table
;
310 /* Set during partial symbol reading, to prevent queueing of full
312 int reading_partial_symbols
;
314 /* Table mapping type DIEs to their struct type *.
315 This is NULL if not allocated yet.
316 The mapping is done via (CU/TU + DIE offset) -> type. */
317 htab_t die_type_hash
;
319 /* The CUs we recently read. */
320 VEC (dwarf2_per_cu_ptr
) *just_read_cus
;
322 /* Table containing line_header indexed by offset and offset_in_dwz. */
323 htab_t line_header_hash
;
326 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
328 /* Default names of the debugging sections. */
330 /* Note that if the debugging section has been compressed, it might
331 have a name like .zdebug_info. */
333 static const struct dwarf2_debug_sections dwarf2_elf_names
=
335 { ".debug_info", ".zdebug_info" },
336 { ".debug_abbrev", ".zdebug_abbrev" },
337 { ".debug_line", ".zdebug_line" },
338 { ".debug_loc", ".zdebug_loc" },
339 { ".debug_loclists", ".zdebug_loclists" },
340 { ".debug_macinfo", ".zdebug_macinfo" },
341 { ".debug_macro", ".zdebug_macro" },
342 { ".debug_str", ".zdebug_str" },
343 { ".debug_line_str", ".zdebug_line_str" },
344 { ".debug_ranges", ".zdebug_ranges" },
345 { ".debug_rnglists", ".zdebug_rnglists" },
346 { ".debug_types", ".zdebug_types" },
347 { ".debug_addr", ".zdebug_addr" },
348 { ".debug_frame", ".zdebug_frame" },
349 { ".eh_frame", NULL
},
350 { ".gdb_index", ".zgdb_index" },
354 /* List of DWO/DWP sections. */
356 static const struct dwop_section_names
358 struct dwarf2_section_names abbrev_dwo
;
359 struct dwarf2_section_names info_dwo
;
360 struct dwarf2_section_names line_dwo
;
361 struct dwarf2_section_names loc_dwo
;
362 struct dwarf2_section_names loclists_dwo
;
363 struct dwarf2_section_names macinfo_dwo
;
364 struct dwarf2_section_names macro_dwo
;
365 struct dwarf2_section_names str_dwo
;
366 struct dwarf2_section_names str_offsets_dwo
;
367 struct dwarf2_section_names types_dwo
;
368 struct dwarf2_section_names cu_index
;
369 struct dwarf2_section_names tu_index
;
373 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
374 { ".debug_info.dwo", ".zdebug_info.dwo" },
375 { ".debug_line.dwo", ".zdebug_line.dwo" },
376 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
377 { ".debug_loclists.dwo", ".zdebug_loclists.dwo" },
378 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
379 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
380 { ".debug_str.dwo", ".zdebug_str.dwo" },
381 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
382 { ".debug_types.dwo", ".zdebug_types.dwo" },
383 { ".debug_cu_index", ".zdebug_cu_index" },
384 { ".debug_tu_index", ".zdebug_tu_index" },
387 /* local data types */
389 /* The data in a compilation unit header, after target2host
390 translation, looks like this. */
391 struct comp_unit_head
395 unsigned char addr_size
;
396 unsigned char signed_addr_p
;
397 sect_offset abbrev_offset
;
399 /* Size of file offsets; either 4 or 8. */
400 unsigned int offset_size
;
402 /* Size of the length field; either 4 or 12. */
403 unsigned int initial_length_size
;
405 enum dwarf_unit_type unit_type
;
407 /* Offset to the first byte of this compilation unit header in the
408 .debug_info section, for resolving relative reference dies. */
411 /* Offset to first die in this cu from the start of the cu.
412 This will be the first byte following the compilation unit header. */
413 cu_offset first_die_offset
;
415 /* 64-bit signature of this type unit - it is valid only for
416 UNIT_TYPE DW_UT_type. */
419 /* For types, offset in the type's DIE of the type defined by this TU. */
420 cu_offset type_offset_in_tu
;
423 /* Type used for delaying computation of method physnames.
424 See comments for compute_delayed_physnames. */
425 struct delayed_method_info
427 /* The type to which the method is attached, i.e., its parent class. */
430 /* The index of the method in the type's function fieldlists. */
433 /* The index of the method in the fieldlist. */
436 /* The name of the DIE. */
439 /* The DIE associated with this method. */
440 struct die_info
*die
;
443 typedef struct delayed_method_info delayed_method_info
;
444 DEF_VEC_O (delayed_method_info
);
446 /* Internal state when decoding a particular compilation unit. */
449 /* The objfile containing this compilation unit. */
450 struct objfile
*objfile
;
452 /* The header of the compilation unit. */
453 struct comp_unit_head header
;
455 /* Base address of this compilation unit. */
456 CORE_ADDR base_address
;
458 /* Non-zero if base_address has been set. */
461 /* The language we are debugging. */
462 enum language language
;
463 const struct language_defn
*language_defn
;
465 const char *producer
;
467 /* The generic symbol table building routines have separate lists for
468 file scope symbols and all all other scopes (local scopes). So
469 we need to select the right one to pass to add_symbol_to_list().
470 We do it by keeping a pointer to the correct list in list_in_scope.
472 FIXME: The original dwarf code just treated the file scope as the
473 first local scope, and all other local scopes as nested local
474 scopes, and worked fine. Check to see if we really need to
475 distinguish these in buildsym.c. */
476 struct pending
**list_in_scope
;
478 /* The abbrev table for this CU.
479 Normally this points to the abbrev table in the objfile.
480 But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */
481 struct abbrev_table
*abbrev_table
;
483 /* Hash table holding all the loaded partial DIEs
484 with partial_die->offset.SECT_OFF as hash. */
487 /* Storage for things with the same lifetime as this read-in compilation
488 unit, including partial DIEs. */
489 struct obstack comp_unit_obstack
;
491 /* When multiple dwarf2_cu structures are living in memory, this field
492 chains them all together, so that they can be released efficiently.
493 We will probably also want a generation counter so that most-recently-used
494 compilation units are cached... */
495 struct dwarf2_per_cu_data
*read_in_chain
;
497 /* Backlink to our per_cu entry. */
498 struct dwarf2_per_cu_data
*per_cu
;
500 /* How many compilation units ago was this CU last referenced? */
503 /* A hash table of DIE cu_offset for following references with
504 die_info->offset.sect_off as hash. */
507 /* Full DIEs if read in. */
508 struct die_info
*dies
;
510 /* A set of pointers to dwarf2_per_cu_data objects for compilation
511 units referenced by this one. Only set during full symbol processing;
512 partial symbol tables do not have dependencies. */
515 /* Header data from the line table, during full symbol processing. */
516 struct line_header
*line_header
;
518 /* A list of methods which need to have physnames computed
519 after all type information has been read. */
520 VEC (delayed_method_info
) *method_list
;
522 /* To be copied to symtab->call_site_htab. */
523 htab_t call_site_htab
;
525 /* Non-NULL if this CU came from a DWO file.
526 There is an invariant here that is important to remember:
527 Except for attributes copied from the top level DIE in the "main"
528 (or "stub") file in preparation for reading the DWO file
529 (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
530 Either there isn't a DWO file (in which case this is NULL and the point
531 is moot), or there is and either we're not going to read it (in which
532 case this is NULL) or there is and we are reading it (in which case this
534 struct dwo_unit
*dwo_unit
;
536 /* The DW_AT_addr_base attribute if present, zero otherwise
537 (zero is a valid value though).
538 Note this value comes from the Fission stub CU/TU's DIE. */
541 /* The DW_AT_ranges_base attribute if present, zero otherwise
542 (zero is a valid value though).
543 Note this value comes from the Fission stub CU/TU's DIE.
544 Also note that the value is zero in the non-DWO case so this value can
545 be used without needing to know whether DWO files are in use or not.
546 N.B. This does not apply to DW_AT_ranges appearing in
547 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
548 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
549 DW_AT_ranges_base *would* have to be applied, and we'd have to care
550 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
551 ULONGEST ranges_base
;
553 /* Mark used when releasing cached dies. */
554 unsigned int mark
: 1;
556 /* This CU references .debug_loc. See the symtab->locations_valid field.
557 This test is imperfect as there may exist optimized debug code not using
558 any location list and still facing inlining issues if handled as
559 unoptimized code. For a future better test see GCC PR other/32998. */
560 unsigned int has_loclist
: 1;
562 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set
563 if all the producer_is_* fields are valid. This information is cached
564 because profiling CU expansion showed excessive time spent in
565 producer_is_gxx_lt_4_6. */
566 unsigned int checked_producer
: 1;
567 unsigned int producer_is_gxx_lt_4_6
: 1;
568 unsigned int producer_is_gcc_lt_4_3
: 1;
569 unsigned int producer_is_icc
: 1;
571 /* When set, the file that we're processing is known to have
572 debugging info for C++ namespaces. GCC 3.3.x did not produce
573 this information, but later versions do. */
575 unsigned int processing_has_namespace_info
: 1;
578 /* Persistent data held for a compilation unit, even when not
579 processing it. We put a pointer to this structure in the
580 read_symtab_private field of the psymtab. */
582 struct dwarf2_per_cu_data
584 /* The start offset and length of this compilation unit.
585 NOTE: Unlike comp_unit_head.length, this length includes
587 If the DIE refers to a DWO file, this is always of the original die,
592 /* DWARF standard version this data has been read from (such as 4 or 5). */
595 /* Flag indicating this compilation unit will be read in before
596 any of the current compilation units are processed. */
597 unsigned int queued
: 1;
599 /* This flag will be set when reading partial DIEs if we need to load
600 absolutely all DIEs for this compilation unit, instead of just the ones
601 we think are interesting. It gets set if we look for a DIE in the
602 hash table and don't find it. */
603 unsigned int load_all_dies
: 1;
605 /* Non-zero if this CU is from .debug_types.
606 Struct dwarf2_per_cu_data is contained in struct signatured_type iff
608 unsigned int is_debug_types
: 1;
610 /* Non-zero if this CU is from the .dwz file. */
611 unsigned int is_dwz
: 1;
613 /* Non-zero if reading a TU directly from a DWO file, bypassing the stub.
614 This flag is only valid if is_debug_types is true.
615 We can't read a CU directly from a DWO file: There are required
616 attributes in the stub. */
617 unsigned int reading_dwo_directly
: 1;
619 /* Non-zero if the TU has been read.
620 This is used to assist the "Stay in DWO Optimization" for Fission:
621 When reading a DWO, it's faster to read TUs from the DWO instead of
622 fetching them from random other DWOs (due to comdat folding).
623 If the TU has already been read, the optimization is unnecessary
624 (and unwise - we don't want to change where gdb thinks the TU lives
626 This flag is only valid if is_debug_types is true. */
627 unsigned int tu_read
: 1;
629 /* The section this CU/TU lives in.
630 If the DIE refers to a DWO file, this is always the original die,
632 struct dwarf2_section_info
*section
;
634 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
635 of the CU cache it gets reset to NULL again. This is left as NULL for
636 dummy CUs (a CU header, but nothing else). */
637 struct dwarf2_cu
*cu
;
639 /* The corresponding objfile.
640 Normally we can get the objfile from dwarf2_per_objfile.
641 However we can enter this file with just a "per_cu" handle. */
642 struct objfile
*objfile
;
644 /* When dwarf2_per_objfile->using_index is true, the 'quick' field
645 is active. Otherwise, the 'psymtab' field is active. */
648 /* The partial symbol table associated with this compilation unit,
649 or NULL for unread partial units. */
650 struct partial_symtab
*psymtab
;
652 /* Data needed by the "quick" functions. */
653 struct dwarf2_per_cu_quick_data
*quick
;
656 /* The CUs we import using DW_TAG_imported_unit. This is filled in
657 while reading psymtabs, used to compute the psymtab dependencies,
658 and then cleared. Then it is filled in again while reading full
659 symbols, and only deleted when the objfile is destroyed.
661 This is also used to work around a difference between the way gold
662 generates .gdb_index version <=7 and the way gdb does. Arguably this
663 is a gold bug. For symbols coming from TUs, gold records in the index
664 the CU that includes the TU instead of the TU itself. This breaks
665 dw2_lookup_symbol: It assumes that if the index says symbol X lives
666 in CU/TU Y, then one need only expand Y and a subsequent lookup in Y
667 will find X. Alas TUs live in their own symtab, so after expanding CU Y
668 we need to look in TU Z to find X. Fortunately, this is akin to
669 DW_TAG_imported_unit, so we just use the same mechanism: For
670 .gdb_index version <=7 this also records the TUs that the CU referred
671 to. Concurrently with this change gdb was modified to emit version 8
672 indices so we only pay a price for gold generated indices.
673 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
674 VEC (dwarf2_per_cu_ptr
) *imported_symtabs
;
677 /* Entry in the signatured_types hash table. */
679 struct signatured_type
681 /* The "per_cu" object of this type.
682 This struct is used iff per_cu.is_debug_types.
683 N.B.: This is the first member so that it's easy to convert pointers
685 struct dwarf2_per_cu_data per_cu
;
687 /* The type's signature. */
690 /* Offset in the TU of the type's DIE, as read from the TU header.
691 If this TU is a DWO stub and the definition lives in a DWO file
692 (specified by DW_AT_GNU_dwo_name), this value is unusable. */
693 cu_offset type_offset_in_tu
;
695 /* Offset in the section of the type's DIE.
696 If the definition lives in a DWO file, this is the offset in the
697 .debug_types.dwo section.
698 The value is zero until the actual value is known.
699 Zero is otherwise not a valid section offset. */
700 sect_offset type_offset_in_section
;
702 /* Type units are grouped by their DW_AT_stmt_list entry so that they
703 can share them. This points to the containing symtab. */
704 struct type_unit_group
*type_unit_group
;
707 The first time we encounter this type we fully read it in and install it
708 in the symbol tables. Subsequent times we only need the type. */
711 /* Containing DWO unit.
712 This field is valid iff per_cu.reading_dwo_directly. */
713 struct dwo_unit
*dwo_unit
;
716 typedef struct signatured_type
*sig_type_ptr
;
717 DEF_VEC_P (sig_type_ptr
);
719 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
720 This includes type_unit_group and quick_file_names. */
722 struct stmt_list_hash
724 /* The DWO unit this table is from or NULL if there is none. */
725 struct dwo_unit
*dwo_unit
;
727 /* Offset in .debug_line or .debug_line.dwo. */
728 sect_offset line_offset
;
731 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
732 an object of this type. */
734 struct type_unit_group
736 /* dwarf2read.c's main "handle" on a TU symtab.
737 To simplify things we create an artificial CU that "includes" all the
738 type units using this stmt_list so that the rest of the code still has
739 a "per_cu" handle on the symtab.
740 This PER_CU is recognized by having no section. */
741 #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL)
742 struct dwarf2_per_cu_data per_cu
;
744 /* The TUs that share this DW_AT_stmt_list entry.
745 This is added to while parsing type units to build partial symtabs,
746 and is deleted afterwards and not used again. */
747 VEC (sig_type_ptr
) *tus
;
749 /* The compunit symtab.
750 Type units in a group needn't all be defined in the same source file,
751 so we create an essentially anonymous symtab as the compunit symtab. */
752 struct compunit_symtab
*compunit_symtab
;
754 /* The data used to construct the hash key. */
755 struct stmt_list_hash hash
;
757 /* The number of symtabs from the line header.
758 The value here must match line_header.num_file_names. */
759 unsigned int num_symtabs
;
761 /* The symbol tables for this TU (obtained from the files listed in
763 WARNING: The order of entries here must match the order of entries
764 in the line header. After the first TU using this type_unit_group, the
765 line header for the subsequent TUs is recreated from this. This is done
766 because we need to use the same symtabs for each TU using the same
767 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
768 there's no guarantee the line header doesn't have duplicate entries. */
769 struct symtab
**symtabs
;
772 /* These sections are what may appear in a (real or virtual) DWO file. */
776 struct dwarf2_section_info abbrev
;
777 struct dwarf2_section_info line
;
778 struct dwarf2_section_info loc
;
779 struct dwarf2_section_info loclists
;
780 struct dwarf2_section_info macinfo
;
781 struct dwarf2_section_info macro
;
782 struct dwarf2_section_info str
;
783 struct dwarf2_section_info str_offsets
;
784 /* In the case of a virtual DWO file, these two are unused. */
785 struct dwarf2_section_info info
;
786 VEC (dwarf2_section_info_def
) *types
;
789 /* CUs/TUs in DWP/DWO files. */
793 /* Backlink to the containing struct dwo_file. */
794 struct dwo_file
*dwo_file
;
796 /* The "id" that distinguishes this CU/TU.
797 .debug_info calls this "dwo_id", .debug_types calls this "signature".
798 Since signatures came first, we stick with it for consistency. */
801 /* The section this CU/TU lives in, in the DWO file. */
802 struct dwarf2_section_info
*section
;
804 /* Same as dwarf2_per_cu_data:{offset,length} but in the DWO section. */
808 /* For types, offset in the type's DIE of the type defined by this TU. */
809 cu_offset type_offset_in_tu
;
812 /* include/dwarf2.h defines the DWP section codes.
813 It defines a max value but it doesn't define a min value, which we
814 use for error checking, so provide one. */
816 enum dwp_v2_section_ids
821 /* Data for one DWO file.
823 This includes virtual DWO files (a virtual DWO file is a DWO file as it
824 appears in a DWP file). DWP files don't really have DWO files per se -
825 comdat folding of types "loses" the DWO file they came from, and from
826 a high level view DWP files appear to contain a mass of random types.
827 However, to maintain consistency with the non-DWP case we pretend DWP
828 files contain virtual DWO files, and we assign each TU with one virtual
829 DWO file (generally based on the line and abbrev section offsets -
830 a heuristic that seems to work in practice). */
834 /* The DW_AT_GNU_dwo_name attribute.
835 For virtual DWO files the name is constructed from the section offsets
836 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
837 from related CU+TUs. */
838 const char *dwo_name
;
840 /* The DW_AT_comp_dir attribute. */
841 const char *comp_dir
;
843 /* The bfd, when the file is open. Otherwise this is NULL.
844 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
847 /* The sections that make up this DWO file.
848 Remember that for virtual DWO files in DWP V2, these are virtual
849 sections (for lack of a better name). */
850 struct dwo_sections sections
;
852 /* The CU in the file.
853 We only support one because having more than one requires hacking the
854 dwo_name of each to match, which is highly unlikely to happen.
855 Doing this means all TUs can share comp_dir: We also assume that
856 DW_AT_comp_dir across all TUs in a DWO file will be identical. */
859 /* Table of TUs in the file.
860 Each element is a struct dwo_unit. */
864 /* These sections are what may appear in a DWP file. */
868 /* These are used by both DWP version 1 and 2. */
869 struct dwarf2_section_info str
;
870 struct dwarf2_section_info cu_index
;
871 struct dwarf2_section_info tu_index
;
873 /* These are only used by DWP version 2 files.
874 In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other
875 sections are referenced by section number, and are not recorded here.
876 In DWP version 2 there is at most one copy of all these sections, each
877 section being (effectively) comprised of the concatenation of all of the
878 individual sections that exist in the version 1 format.
879 To keep the code simple we treat each of these concatenated pieces as a
880 section itself (a virtual section?). */
881 struct dwarf2_section_info abbrev
;
882 struct dwarf2_section_info info
;
883 struct dwarf2_section_info line
;
884 struct dwarf2_section_info loc
;
885 struct dwarf2_section_info macinfo
;
886 struct dwarf2_section_info macro
;
887 struct dwarf2_section_info str_offsets
;
888 struct dwarf2_section_info types
;
891 /* These sections are what may appear in a virtual DWO file in DWP version 1.
892 A virtual DWO file is a DWO file as it appears in a DWP file. */
894 struct virtual_v1_dwo_sections
896 struct dwarf2_section_info abbrev
;
897 struct dwarf2_section_info line
;
898 struct dwarf2_section_info loc
;
899 struct dwarf2_section_info macinfo
;
900 struct dwarf2_section_info macro
;
901 struct dwarf2_section_info str_offsets
;
902 /* Each DWP hash table entry records one CU or one TU.
903 That is recorded here, and copied to dwo_unit.section. */
904 struct dwarf2_section_info info_or_types
;
907 /* Similar to virtual_v1_dwo_sections, but for DWP version 2.
908 In version 2, the sections of the DWO files are concatenated together
909 and stored in one section of that name. Thus each ELF section contains
910 several "virtual" sections. */
912 struct virtual_v2_dwo_sections
914 bfd_size_type abbrev_offset
;
915 bfd_size_type abbrev_size
;
917 bfd_size_type line_offset
;
918 bfd_size_type line_size
;
920 bfd_size_type loc_offset
;
921 bfd_size_type loc_size
;
923 bfd_size_type macinfo_offset
;
924 bfd_size_type macinfo_size
;
926 bfd_size_type macro_offset
;
927 bfd_size_type macro_size
;
929 bfd_size_type str_offsets_offset
;
930 bfd_size_type str_offsets_size
;
932 /* Each DWP hash table entry records one CU or one TU.
933 That is recorded here, and copied to dwo_unit.section. */
934 bfd_size_type info_or_types_offset
;
935 bfd_size_type info_or_types_size
;
938 /* Contents of DWP hash tables. */
940 struct dwp_hash_table
942 uint32_t version
, nr_columns
;
943 uint32_t nr_units
, nr_slots
;
944 const gdb_byte
*hash_table
, *unit_table
;
949 const gdb_byte
*indices
;
953 /* This is indexed by column number and gives the id of the section
955 #define MAX_NR_V2_DWO_SECTIONS \
956 (1 /* .debug_info or .debug_types */ \
957 + 1 /* .debug_abbrev */ \
958 + 1 /* .debug_line */ \
959 + 1 /* .debug_loc */ \
960 + 1 /* .debug_str_offsets */ \
961 + 1 /* .debug_macro or .debug_macinfo */)
962 int section_ids
[MAX_NR_V2_DWO_SECTIONS
];
963 const gdb_byte
*offsets
;
964 const gdb_byte
*sizes
;
969 /* Data for one DWP file. */
973 /* Name of the file. */
976 /* File format version. */
982 /* Section info for this file. */
983 struct dwp_sections sections
;
985 /* Table of CUs in the file. */
986 const struct dwp_hash_table
*cus
;
988 /* Table of TUs in the file. */
989 const struct dwp_hash_table
*tus
;
991 /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
995 /* Table to map ELF section numbers to their sections.
996 This is only needed for the DWP V1 file format. */
997 unsigned int num_sections
;
998 asection
**elf_sections
;
1001 /* This represents a '.dwz' file. */
1005 /* A dwz file can only contain a few sections. */
1006 struct dwarf2_section_info abbrev
;
1007 struct dwarf2_section_info info
;
1008 struct dwarf2_section_info str
;
1009 struct dwarf2_section_info line
;
1010 struct dwarf2_section_info macro
;
1011 struct dwarf2_section_info gdb_index
;
1013 /* The dwz's BFD. */
1017 /* Struct used to pass misc. parameters to read_die_and_children, et
1018 al. which are used for both .debug_info and .debug_types dies.
1019 All parameters here are unchanging for the life of the call. This
1020 struct exists to abstract away the constant parameters of die reading. */
1022 struct die_reader_specs
1024 /* The bfd of die_section. */
1027 /* The CU of the DIE we are parsing. */
1028 struct dwarf2_cu
*cu
;
1030 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
1031 struct dwo_file
*dwo_file
;
1033 /* The section the die comes from.
1034 This is either .debug_info or .debug_types, or the .dwo variants. */
1035 struct dwarf2_section_info
*die_section
;
1037 /* die_section->buffer. */
1038 const gdb_byte
*buffer
;
1040 /* The end of the buffer. */
1041 const gdb_byte
*buffer_end
;
1043 /* The value of the DW_AT_comp_dir attribute. */
1044 const char *comp_dir
;
1047 /* Type of function passed to init_cutu_and_read_dies, et.al. */
1048 typedef void (die_reader_func_ftype
) (const struct die_reader_specs
*reader
,
1049 const gdb_byte
*info_ptr
,
1050 struct die_info
*comp_unit_die
,
1057 unsigned int dir_index
;
1058 unsigned int mod_time
;
1059 unsigned int length
;
1060 /* Non-zero if referenced by the Line Number Program. */
1062 /* The associated symbol table, if any. */
1063 struct symtab
*symtab
;
1066 /* The line number information for a compilation unit (found in the
1067 .debug_line section) begins with a "statement program header",
1068 which contains the following information. */
1071 /* Offset of line number information in .debug_line section. */
1074 /* OFFSET is for struct dwz_file associated with dwarf2_per_objfile. */
1075 unsigned offset_in_dwz
: 1;
1077 unsigned int total_length
;
1078 unsigned short version
;
1079 unsigned int header_length
;
1080 unsigned char minimum_instruction_length
;
1081 unsigned char maximum_ops_per_instruction
;
1082 unsigned char default_is_stmt
;
1084 unsigned char line_range
;
1085 unsigned char opcode_base
;
1087 /* standard_opcode_lengths[i] is the number of operands for the
1088 standard opcode whose value is i. This means that
1089 standard_opcode_lengths[0] is unused, and the last meaningful
1090 element is standard_opcode_lengths[opcode_base - 1]. */
1091 unsigned char *standard_opcode_lengths
;
1093 /* The include_directories table. NOTE! These strings are not
1094 allocated with xmalloc; instead, they are pointers into
1095 debug_line_buffer. If you try to free them, `free' will get
1097 unsigned int num_include_dirs
, include_dirs_size
;
1098 const char **include_dirs
;
1100 /* The file_names table. NOTE! These strings are not allocated
1101 with xmalloc; instead, they are pointers into debug_line_buffer.
1102 Don't try to free them directly. */
1103 unsigned int num_file_names
, file_names_size
;
1104 struct file_entry
*file_names
;
1106 /* The start and end of the statement program following this
1107 header. These point into dwarf2_per_objfile->line_buffer. */
1108 const gdb_byte
*statement_program_start
, *statement_program_end
;
1111 /* When we construct a partial symbol table entry we only
1112 need this much information. */
1113 struct partial_die_info
1115 /* Offset of this DIE. */
1118 /* DWARF-2 tag for this DIE. */
1119 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1121 /* Assorted flags describing the data found in this DIE. */
1122 unsigned int has_children
: 1;
1123 unsigned int is_external
: 1;
1124 unsigned int is_declaration
: 1;
1125 unsigned int has_type
: 1;
1126 unsigned int has_specification
: 1;
1127 unsigned int has_pc_info
: 1;
1128 unsigned int may_be_inlined
: 1;
1130 /* This DIE has been marked DW_AT_main_subprogram. */
1131 unsigned int main_subprogram
: 1;
1133 /* Flag set if the SCOPE field of this structure has been
1135 unsigned int scope_set
: 1;
1137 /* Flag set if the DIE has a byte_size attribute. */
1138 unsigned int has_byte_size
: 1;
1140 /* Flag set if the DIE has a DW_AT_const_value attribute. */
1141 unsigned int has_const_value
: 1;
1143 /* Flag set if any of the DIE's children are template arguments. */
1144 unsigned int has_template_arguments
: 1;
1146 /* Flag set if fixup_partial_die has been called on this die. */
1147 unsigned int fixup_called
: 1;
1149 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
1150 unsigned int is_dwz
: 1;
1152 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
1153 unsigned int spec_is_dwz
: 1;
1155 /* The name of this DIE. Normally the value of DW_AT_name, but
1156 sometimes a default name for unnamed DIEs. */
1159 /* The linkage name, if present. */
1160 const char *linkage_name
;
1162 /* The scope to prepend to our children. This is generally
1163 allocated on the comp_unit_obstack, so will disappear
1164 when this compilation unit leaves the cache. */
1167 /* Some data associated with the partial DIE. The tag determines
1168 which field is live. */
1171 /* The location description associated with this DIE, if any. */
1172 struct dwarf_block
*locdesc
;
1173 /* The offset of an import, for DW_TAG_imported_unit. */
1177 /* If HAS_PC_INFO, the PC range associated with this DIE. */
1181 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
1182 DW_AT_sibling, if any. */
1183 /* NOTE: This member isn't strictly necessary, read_partial_die could
1184 return DW_AT_sibling values to its caller load_partial_dies. */
1185 const gdb_byte
*sibling
;
1187 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
1188 DW_AT_specification (or DW_AT_abstract_origin or
1189 DW_AT_extension). */
1190 sect_offset spec_offset
;
1192 /* Pointers to this DIE's parent, first child, and next sibling,
1194 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
1197 /* This data structure holds the information of an abbrev. */
1200 unsigned int number
; /* number identifying abbrev */
1201 enum dwarf_tag tag
; /* dwarf tag */
1202 unsigned short has_children
; /* boolean */
1203 unsigned short num_attrs
; /* number of attributes */
1204 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
1205 struct abbrev_info
*next
; /* next in chain */
1210 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1211 ENUM_BITFIELD(dwarf_form
) form
: 16;
1213 /* It is valid only if FORM is DW_FORM_implicit_const. */
1214 LONGEST implicit_const
;
1217 /* Size of abbrev_table.abbrev_hash_table. */
1218 #define ABBREV_HASH_SIZE 121
1220 /* Top level data structure to contain an abbreviation table. */
1224 /* Where the abbrev table came from.
1225 This is used as a sanity check when the table is used. */
1228 /* Storage for the abbrev table. */
1229 struct obstack abbrev_obstack
;
1231 /* Hash table of abbrevs.
1232 This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
1233 It could be statically allocated, but the previous code didn't so we
1235 struct abbrev_info
**abbrevs
;
1238 /* Attributes have a name and a value. */
1241 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1242 ENUM_BITFIELD(dwarf_form
) form
: 15;
1244 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
1245 field should be in u.str (existing only for DW_STRING) but it is kept
1246 here for better struct attribute alignment. */
1247 unsigned int string_is_canonical
: 1;
1252 struct dwarf_block
*blk
;
1261 /* This data structure holds a complete die structure. */
1264 /* DWARF-2 tag for this DIE. */
1265 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1267 /* Number of attributes */
1268 unsigned char num_attrs
;
1270 /* True if we're presently building the full type name for the
1271 type derived from this DIE. */
1272 unsigned char building_fullname
: 1;
1274 /* True if this die is in process. PR 16581. */
1275 unsigned char in_process
: 1;
1278 unsigned int abbrev
;
1280 /* Offset in .debug_info or .debug_types section. */
1283 /* The dies in a compilation unit form an n-ary tree. PARENT
1284 points to this die's parent; CHILD points to the first child of
1285 this node; and all the children of a given node are chained
1286 together via their SIBLING fields. */
1287 struct die_info
*child
; /* Its first child, if any. */
1288 struct die_info
*sibling
; /* Its next sibling, if any. */
1289 struct die_info
*parent
; /* Its parent, if any. */
1291 /* An array of attributes, with NUM_ATTRS elements. There may be
1292 zero, but it's not common and zero-sized arrays are not
1293 sufficiently portable C. */
1294 struct attribute attrs
[1];
1297 /* Get at parts of an attribute structure. */
1299 #define DW_STRING(attr) ((attr)->u.str)
1300 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
1301 #define DW_UNSND(attr) ((attr)->u.unsnd)
1302 #define DW_BLOCK(attr) ((attr)->u.blk)
1303 #define DW_SND(attr) ((attr)->u.snd)
1304 #define DW_ADDR(attr) ((attr)->u.addr)
1305 #define DW_SIGNATURE(attr) ((attr)->u.signature)
1307 /* Blocks are a bunch of untyped bytes. */
1312 /* Valid only if SIZE is not zero. */
1313 const gdb_byte
*data
;
1316 #ifndef ATTR_ALLOC_CHUNK
1317 #define ATTR_ALLOC_CHUNK 4
1320 /* Allocate fields for structs, unions and enums in this size. */
1321 #ifndef DW_FIELD_ALLOC_CHUNK
1322 #define DW_FIELD_ALLOC_CHUNK 4
1325 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1326 but this would require a corresponding change in unpack_field_as_long
1328 static int bits_per_byte
= 8;
1332 struct nextfield
*next
;
1340 struct nextfnfield
*next
;
1341 struct fn_field fnfield
;
1348 struct nextfnfield
*head
;
1351 struct typedef_field_list
1353 struct typedef_field field
;
1354 struct typedef_field_list
*next
;
1357 /* The routines that read and process dies for a C struct or C++ class
1358 pass lists of data member fields and lists of member function fields
1359 in an instance of a field_info structure, as defined below. */
1362 /* List of data member and baseclasses fields. */
1363 struct nextfield
*fields
, *baseclasses
;
1365 /* Number of fields (including baseclasses). */
1368 /* Number of baseclasses. */
1371 /* Set if the accesibility of one of the fields is not public. */
1372 int non_public_fields
;
1374 /* Member function fields array, entries are allocated in the order they
1375 are encountered in the object file. */
1376 struct nextfnfield
*fnfields
;
1378 /* Member function fieldlist array, contains name of possibly overloaded
1379 member function, number of overloaded member functions and a pointer
1380 to the head of the member function field chain. */
1381 struct fnfieldlist
*fnfieldlists
;
1383 /* Number of entries in the fnfieldlists array. */
1386 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1387 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1388 struct typedef_field_list
*typedef_field_list
;
1389 unsigned typedef_field_list_count
;
1392 /* One item on the queue of compilation units to read in full symbols
1394 struct dwarf2_queue_item
1396 struct dwarf2_per_cu_data
*per_cu
;
1397 enum language pretend_language
;
1398 struct dwarf2_queue_item
*next
;
1401 /* The current queue. */
1402 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
1404 /* Loaded secondary compilation units are kept in memory until they
1405 have not been referenced for the processing of this many
1406 compilation units. Set this to zero to disable caching. Cache
1407 sizes of up to at least twenty will improve startup time for
1408 typical inter-CU-reference binaries, at an obvious memory cost. */
1409 static int dwarf_max_cache_age
= 5;
1411 show_dwarf_max_cache_age (struct ui_file
*file
, int from_tty
,
1412 struct cmd_list_element
*c
, const char *value
)
1414 fprintf_filtered (file
, _("The upper bound on the age of cached "
1415 "DWARF compilation units is %s.\n"),
1419 /* local function prototypes */
1421 static const char *get_section_name (const struct dwarf2_section_info
*);
1423 static const char *get_section_file_name (const struct dwarf2_section_info
*);
1425 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
1427 static void dwarf2_find_base_address (struct die_info
*die
,
1428 struct dwarf2_cu
*cu
);
1430 static struct partial_symtab
*create_partial_symtab
1431 (struct dwarf2_per_cu_data
*per_cu
, const char *name
);
1433 static void dwarf2_build_psymtabs_hard (struct objfile
*);
1435 static void scan_partial_symbols (struct partial_die_info
*,
1436 CORE_ADDR
*, CORE_ADDR
*,
1437 int, struct dwarf2_cu
*);
1439 static void add_partial_symbol (struct partial_die_info
*,
1440 struct dwarf2_cu
*);
1442 static void add_partial_namespace (struct partial_die_info
*pdi
,
1443 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1444 int set_addrmap
, struct dwarf2_cu
*cu
);
1446 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1447 CORE_ADDR
*highpc
, int set_addrmap
,
1448 struct dwarf2_cu
*cu
);
1450 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1451 struct dwarf2_cu
*cu
);
1453 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1454 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1455 int need_pc
, struct dwarf2_cu
*cu
);
1457 static void dwarf2_read_symtab (struct partial_symtab
*,
1460 static void psymtab_to_symtab_1 (struct partial_symtab
*);
1462 static struct abbrev_info
*abbrev_table_lookup_abbrev
1463 (const struct abbrev_table
*, unsigned int);
1465 static struct abbrev_table
*abbrev_table_read_table
1466 (struct dwarf2_section_info
*, sect_offset
);
1468 static void abbrev_table_free (struct abbrev_table
*);
1470 static void abbrev_table_free_cleanup (void *);
1472 static void dwarf2_read_abbrevs (struct dwarf2_cu
*,
1473 struct dwarf2_section_info
*);
1475 static void dwarf2_free_abbrev_table (void *);
1477 static unsigned int peek_abbrev_code (bfd
*, const gdb_byte
*);
1479 static struct partial_die_info
*load_partial_dies
1480 (const struct die_reader_specs
*, const gdb_byte
*, int);
1482 static const gdb_byte
*read_partial_die (const struct die_reader_specs
*,
1483 struct partial_die_info
*,
1484 struct abbrev_info
*,
1488 static struct partial_die_info
*find_partial_die (sect_offset
, int,
1489 struct dwarf2_cu
*);
1491 static void fixup_partial_die (struct partial_die_info
*,
1492 struct dwarf2_cu
*);
1494 static const gdb_byte
*read_attribute (const struct die_reader_specs
*,
1495 struct attribute
*, struct attr_abbrev
*,
1498 static unsigned int read_1_byte (bfd
*, const gdb_byte
*);
1500 static int read_1_signed_byte (bfd
*, const gdb_byte
*);
1502 static unsigned int read_2_bytes (bfd
*, const gdb_byte
*);
1504 static unsigned int read_4_bytes (bfd
*, const gdb_byte
*);
1506 static ULONGEST
read_8_bytes (bfd
*, const gdb_byte
*);
1508 static CORE_ADDR
read_address (bfd
*, const gdb_byte
*ptr
, struct dwarf2_cu
*,
1511 static LONGEST
read_initial_length (bfd
*, const gdb_byte
*, unsigned int *);
1513 static LONGEST read_checked_initial_length_and_offset
1514 (bfd
*, const gdb_byte
*, const struct comp_unit_head
*,
1515 unsigned int *, unsigned int *);
1517 static LONGEST
read_offset (bfd
*, const gdb_byte
*,
1518 const struct comp_unit_head
*,
1521 static LONGEST
read_offset_1 (bfd
*, const gdb_byte
*, unsigned int);
1523 static sect_offset
read_abbrev_offset (struct dwarf2_section_info
*,
1526 static const gdb_byte
*read_n_bytes (bfd
*, const gdb_byte
*, unsigned int);
1528 static const char *read_direct_string (bfd
*, const gdb_byte
*, unsigned int *);
1530 static const char *read_indirect_string (bfd
*, const gdb_byte
*,
1531 const struct comp_unit_head
*,
1534 static const char *read_indirect_line_string (bfd
*, const gdb_byte
*,
1535 const struct comp_unit_head
*,
1538 static const char *read_indirect_string_from_dwz (struct dwz_file
*, LONGEST
);
1540 static LONGEST
read_signed_leb128 (bfd
*, const gdb_byte
*, unsigned int *);
1542 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*,
1546 static const char *read_str_index (const struct die_reader_specs
*reader
,
1547 ULONGEST str_index
);
1549 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1551 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1552 struct dwarf2_cu
*);
1554 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
1557 static const char *dwarf2_string_attr (struct die_info
*die
, unsigned int name
,
1558 struct dwarf2_cu
*cu
);
1560 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1561 struct dwarf2_cu
*cu
);
1563 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1565 static struct die_info
*die_specification (struct die_info
*die
,
1566 struct dwarf2_cu
**);
1568 static void free_line_header (struct line_header
*lh
);
1570 static struct line_header
*dwarf_decode_line_header (unsigned int offset
,
1571 struct dwarf2_cu
*cu
);
1573 static void dwarf_decode_lines (struct line_header
*, const char *,
1574 struct dwarf2_cu
*, struct partial_symtab
*,
1575 CORE_ADDR
, int decode_mapping
);
1577 static void dwarf2_start_subfile (const char *, const char *);
1579 static struct compunit_symtab
*dwarf2_start_symtab (struct dwarf2_cu
*,
1580 const char *, const char *,
1583 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1584 struct dwarf2_cu
*);
1586 static struct symbol
*new_symbol_full (struct die_info
*, struct type
*,
1587 struct dwarf2_cu
*, struct symbol
*);
1589 static void dwarf2_const_value (const struct attribute
*, struct symbol
*,
1590 struct dwarf2_cu
*);
1592 static void dwarf2_const_value_attr (const struct attribute
*attr
,
1595 struct obstack
*obstack
,
1596 struct dwarf2_cu
*cu
, LONGEST
*value
,
1597 const gdb_byte
**bytes
,
1598 struct dwarf2_locexpr_baton
**baton
);
1600 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1602 static int need_gnat_info (struct dwarf2_cu
*);
1604 static struct type
*die_descriptive_type (struct die_info
*,
1605 struct dwarf2_cu
*);
1607 static void set_descriptive_type (struct type
*, struct die_info
*,
1608 struct dwarf2_cu
*);
1610 static struct type
*die_containing_type (struct die_info
*,
1611 struct dwarf2_cu
*);
1613 static struct type
*lookup_die_type (struct die_info
*, const struct attribute
*,
1614 struct dwarf2_cu
*);
1616 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1618 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1620 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1622 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1623 const char *suffix
, int physname
,
1624 struct dwarf2_cu
*cu
);
1626 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1628 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1630 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1632 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1634 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1636 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1637 struct dwarf2_cu
*, struct partial_symtab
*);
1639 /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return
1640 values. Keep the items ordered with increasing constraints compliance. */
1643 /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */
1644 PC_BOUNDS_NOT_PRESENT
,
1646 /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges
1647 were present but they do not form a valid range of PC addresses. */
1650 /* Discontiguous range was found - that is DW_AT_ranges was found. */
1653 /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */
1657 static enum pc_bounds_kind
dwarf2_get_pc_bounds (struct die_info
*,
1658 CORE_ADDR
*, CORE_ADDR
*,
1660 struct partial_symtab
*);
1662 static void get_scope_pc_bounds (struct die_info
*,
1663 CORE_ADDR
*, CORE_ADDR
*,
1664 struct dwarf2_cu
*);
1666 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1667 CORE_ADDR
, struct dwarf2_cu
*);
1669 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1670 struct dwarf2_cu
*);
1672 static void dwarf2_attach_fields_to_type (struct field_info
*,
1673 struct type
*, struct dwarf2_cu
*);
1675 static void dwarf2_add_member_fn (struct field_info
*,
1676 struct die_info
*, struct type
*,
1677 struct dwarf2_cu
*);
1679 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1681 struct dwarf2_cu
*);
1683 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1685 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1687 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1689 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1691 static struct using_direct
**using_directives (enum language
);
1693 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1695 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1697 static struct type
*read_module_type (struct die_info
*die
,
1698 struct dwarf2_cu
*cu
);
1700 static const char *namespace_name (struct die_info
*die
,
1701 int *is_anonymous
, struct dwarf2_cu
*);
1703 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1705 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1707 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1708 struct dwarf2_cu
*);
1710 static struct die_info
*read_die_and_siblings_1
1711 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1714 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1715 const gdb_byte
*info_ptr
,
1716 const gdb_byte
**new_info_ptr
,
1717 struct die_info
*parent
);
1719 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1720 struct die_info
**, const gdb_byte
*,
1723 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1724 struct die_info
**, const gdb_byte
*,
1727 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1729 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1732 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1734 static const char *dwarf2_full_name (const char *name
,
1735 struct die_info
*die
,
1736 struct dwarf2_cu
*cu
);
1738 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1739 struct dwarf2_cu
*cu
);
1741 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1742 struct dwarf2_cu
**);
1744 static const char *dwarf_tag_name (unsigned int);
1746 static const char *dwarf_attr_name (unsigned int);
1748 static const char *dwarf_form_name (unsigned int);
1750 static char *dwarf_bool_name (unsigned int);
1752 static const char *dwarf_type_encoding_name (unsigned int);
1754 static struct die_info
*sibling_die (struct die_info
*);
1756 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1758 static void dump_die_for_error (struct die_info
*);
1760 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1763 /*static*/ void dump_die (struct die_info
*, int max_level
);
1765 static void store_in_ref_table (struct die_info
*,
1766 struct dwarf2_cu
*);
1768 static sect_offset
dwarf2_get_ref_die_offset (const struct attribute
*);
1770 static LONGEST
dwarf2_get_attr_constant_value (const struct attribute
*, int);
1772 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1773 const struct attribute
*,
1774 struct dwarf2_cu
**);
1776 static struct die_info
*follow_die_ref (struct die_info
*,
1777 const struct attribute
*,
1778 struct dwarf2_cu
**);
1780 static struct die_info
*follow_die_sig (struct die_info
*,
1781 const struct attribute
*,
1782 struct dwarf2_cu
**);
1784 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1785 struct dwarf2_cu
*);
1787 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1788 const struct attribute
*,
1789 struct dwarf2_cu
*);
1791 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1793 static void read_signatured_type (struct signatured_type
*);
1795 static int attr_to_dynamic_prop (const struct attribute
*attr
,
1796 struct die_info
*die
, struct dwarf2_cu
*cu
,
1797 struct dynamic_prop
*prop
);
1799 /* memory allocation interface */
1801 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1803 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1805 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1807 static int attr_form_is_block (const struct attribute
*);
1809 static int attr_form_is_section_offset (const struct attribute
*);
1811 static int attr_form_is_constant (const struct attribute
*);
1813 static int attr_form_is_ref (const struct attribute
*);
1815 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1816 struct dwarf2_loclist_baton
*baton
,
1817 const struct attribute
*attr
);
1819 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1821 struct dwarf2_cu
*cu
,
1824 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1825 const gdb_byte
*info_ptr
,
1826 struct abbrev_info
*abbrev
);
1828 static void free_stack_comp_unit (void *);
1830 static hashval_t
partial_die_hash (const void *item
);
1832 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1834 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1835 (sect_offset offset
, unsigned int offset_in_dwz
, struct objfile
*objfile
);
1837 static void init_one_comp_unit (struct dwarf2_cu
*cu
,
1838 struct dwarf2_per_cu_data
*per_cu
);
1840 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1841 struct die_info
*comp_unit_die
,
1842 enum language pretend_language
);
1844 static void free_heap_comp_unit (void *);
1846 static void free_cached_comp_units (void *);
1848 static void age_cached_comp_units (void);
1850 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1852 static struct type
*set_die_type (struct die_info
*, struct type
*,
1853 struct dwarf2_cu
*);
1855 static void create_all_comp_units (struct objfile
*);
1857 static int create_all_type_units (struct objfile
*);
1859 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1862 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1865 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1868 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1869 struct dwarf2_per_cu_data
*);
1871 static void dwarf2_mark (struct dwarf2_cu
*);
1873 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1875 static struct type
*get_die_type_at_offset (sect_offset
,
1876 struct dwarf2_per_cu_data
*);
1878 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1880 static void dwarf2_release_queue (void *dummy
);
1882 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1883 enum language pretend_language
);
1885 static void process_queue (void);
1887 static void find_file_and_directory (struct die_info
*die
,
1888 struct dwarf2_cu
*cu
,
1889 const char **name
, const char **comp_dir
);
1891 static char *file_full_name (int file
, struct line_header
*lh
,
1892 const char *comp_dir
);
1894 /* Expected enum dwarf_unit_type for read_comp_unit_head. */
1895 enum class rcuh_kind
{ COMPILE
, TYPE
};
1897 static const gdb_byte
*read_and_check_comp_unit_head
1898 (struct comp_unit_head
*header
,
1899 struct dwarf2_section_info
*section
,
1900 struct dwarf2_section_info
*abbrev_section
, const gdb_byte
*info_ptr
,
1901 rcuh_kind section_kind
);
1903 static void init_cutu_and_read_dies
1904 (struct dwarf2_per_cu_data
*this_cu
, struct abbrev_table
*abbrev_table
,
1905 int use_existing_cu
, int keep
,
1906 die_reader_func_ftype
*die_reader_func
, void *data
);
1908 static void init_cutu_and_read_dies_simple
1909 (struct dwarf2_per_cu_data
*this_cu
,
1910 die_reader_func_ftype
*die_reader_func
, void *data
);
1912 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1914 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
1916 static struct dwo_unit
*lookup_dwo_unit_in_dwp
1917 (struct dwp_file
*dwp_file
, const char *comp_dir
,
1918 ULONGEST signature
, int is_debug_types
);
1920 static struct dwp_file
*get_dwp_file (void);
1922 static struct dwo_unit
*lookup_dwo_comp_unit
1923 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
1925 static struct dwo_unit
*lookup_dwo_type_unit
1926 (struct signatured_type
*, const char *, const char *);
1928 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
1930 static void free_dwo_file_cleanup (void *);
1932 static void process_cu_includes (void);
1934 static void check_producer (struct dwarf2_cu
*cu
);
1936 static void free_line_header_voidp (void *arg
);
1938 /* Various complaints about symbol reading that don't abort the process. */
1941 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
1943 complaint (&symfile_complaints
,
1944 _("statement list doesn't fit in .debug_line section"));
1948 dwarf2_debug_line_missing_file_complaint (void)
1950 complaint (&symfile_complaints
,
1951 _(".debug_line section has line data without a file"));
1955 dwarf2_debug_line_missing_end_sequence_complaint (void)
1957 complaint (&symfile_complaints
,
1958 _(".debug_line section has line "
1959 "program sequence without an end"));
1963 dwarf2_complex_location_expr_complaint (void)
1965 complaint (&symfile_complaints
, _("location expression too complex"));
1969 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
1972 complaint (&symfile_complaints
,
1973 _("const value length mismatch for '%s', got %d, expected %d"),
1978 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
1980 complaint (&symfile_complaints
,
1981 _("debug info runs off end of %s section"
1983 get_section_name (section
),
1984 get_section_file_name (section
));
1988 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
1990 complaint (&symfile_complaints
,
1991 _("macro debug info contains a "
1992 "malformed macro definition:\n`%s'"),
1997 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
1999 complaint (&symfile_complaints
,
2000 _("invalid attribute class or form for '%s' in '%s'"),
2004 /* Hash function for line_header_hash. */
2007 line_header_hash (const struct line_header
*ofs
)
2009 return ofs
->offset
.sect_off
^ ofs
->offset_in_dwz
;
2012 /* Hash function for htab_create_alloc_ex for line_header_hash. */
2015 line_header_hash_voidp (const void *item
)
2017 const struct line_header
*ofs
= (const struct line_header
*) item
;
2019 return line_header_hash (ofs
);
2022 /* Equality function for line_header_hash. */
2025 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
2027 const struct line_header
*ofs_lhs
= (const struct line_header
*) item_lhs
;
2028 const struct line_header
*ofs_rhs
= (const struct line_header
*) item_rhs
;
2030 return (ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
2031 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
2037 /* Convert VALUE between big- and little-endian. */
2039 byte_swap (offset_type value
)
2043 result
= (value
& 0xff) << 24;
2044 result
|= (value
& 0xff00) << 8;
2045 result
|= (value
& 0xff0000) >> 8;
2046 result
|= (value
& 0xff000000) >> 24;
2050 #define MAYBE_SWAP(V) byte_swap (V)
2053 #define MAYBE_SWAP(V) (V)
2054 #endif /* WORDS_BIGENDIAN */
2056 /* Read the given attribute value as an address, taking the attribute's
2057 form into account. */
2060 attr_value_as_address (struct attribute
*attr
)
2064 if (attr
->form
!= DW_FORM_addr
&& attr
->form
!= DW_FORM_GNU_addr_index
)
2066 /* Aside from a few clearly defined exceptions, attributes that
2067 contain an address must always be in DW_FORM_addr form.
2068 Unfortunately, some compilers happen to be violating this
2069 requirement by encoding addresses using other forms, such
2070 as DW_FORM_data4 for example. For those broken compilers,
2071 we try to do our best, without any guarantee of success,
2072 to interpret the address correctly. It would also be nice
2073 to generate a complaint, but that would require us to maintain
2074 a list of legitimate cases where a non-address form is allowed,
2075 as well as update callers to pass in at least the CU's DWARF
2076 version. This is more overhead than what we're willing to
2077 expand for a pretty rare case. */
2078 addr
= DW_UNSND (attr
);
2081 addr
= DW_ADDR (attr
);
2086 /* The suffix for an index file. */
2087 #define INDEX_SUFFIX ".gdb-index"
2089 /* Try to locate the sections we need for DWARF 2 debugging
2090 information and return true if we have enough to do something.
2091 NAMES points to the dwarf2 section names, or is NULL if the standard
2092 ELF names are used. */
2095 dwarf2_has_info (struct objfile
*objfile
,
2096 const struct dwarf2_debug_sections
*names
)
2098 dwarf2_per_objfile
= ((struct dwarf2_per_objfile
*)
2099 objfile_data (objfile
, dwarf2_objfile_data_key
));
2100 if (!dwarf2_per_objfile
)
2102 /* Initialize per-objfile state. */
2103 struct dwarf2_per_objfile
*data
2104 = XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_per_objfile
);
2106 memset (data
, 0, sizeof (*data
));
2107 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
2108 dwarf2_per_objfile
= data
;
2110 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
,
2112 dwarf2_per_objfile
->objfile
= objfile
;
2114 return (!dwarf2_per_objfile
->info
.is_virtual
2115 && dwarf2_per_objfile
->info
.s
.section
!= NULL
2116 && !dwarf2_per_objfile
->abbrev
.is_virtual
2117 && dwarf2_per_objfile
->abbrev
.s
.section
!= NULL
);
2120 /* Return the containing section of virtual section SECTION. */
2122 static struct dwarf2_section_info
*
2123 get_containing_section (const struct dwarf2_section_info
*section
)
2125 gdb_assert (section
->is_virtual
);
2126 return section
->s
.containing_section
;
2129 /* Return the bfd owner of SECTION. */
2132 get_section_bfd_owner (const struct dwarf2_section_info
*section
)
2134 if (section
->is_virtual
)
2136 section
= get_containing_section (section
);
2137 gdb_assert (!section
->is_virtual
);
2139 return section
->s
.section
->owner
;
2142 /* Return the bfd section of SECTION.
2143 Returns NULL if the section is not present. */
2146 get_section_bfd_section (const struct dwarf2_section_info
*section
)
2148 if (section
->is_virtual
)
2150 section
= get_containing_section (section
);
2151 gdb_assert (!section
->is_virtual
);
2153 return section
->s
.section
;
2156 /* Return the name of SECTION. */
2159 get_section_name (const struct dwarf2_section_info
*section
)
2161 asection
*sectp
= get_section_bfd_section (section
);
2163 gdb_assert (sectp
!= NULL
);
2164 return bfd_section_name (get_section_bfd_owner (section
), sectp
);
2167 /* Return the name of the file SECTION is in. */
2170 get_section_file_name (const struct dwarf2_section_info
*section
)
2172 bfd
*abfd
= get_section_bfd_owner (section
);
2174 return bfd_get_filename (abfd
);
2177 /* Return the id of SECTION.
2178 Returns 0 if SECTION doesn't exist. */
2181 get_section_id (const struct dwarf2_section_info
*section
)
2183 asection
*sectp
= get_section_bfd_section (section
);
2190 /* Return the flags of SECTION.
2191 SECTION (or containing section if this is a virtual section) must exist. */
2194 get_section_flags (const struct dwarf2_section_info
*section
)
2196 asection
*sectp
= get_section_bfd_section (section
);
2198 gdb_assert (sectp
!= NULL
);
2199 return bfd_get_section_flags (sectp
->owner
, sectp
);
2202 /* When loading sections, we look either for uncompressed section or for
2203 compressed section names. */
2206 section_is_p (const char *section_name
,
2207 const struct dwarf2_section_names
*names
)
2209 if (names
->normal
!= NULL
2210 && strcmp (section_name
, names
->normal
) == 0)
2212 if (names
->compressed
!= NULL
2213 && strcmp (section_name
, names
->compressed
) == 0)
2218 /* This function is mapped across the sections and remembers the
2219 offset and size of each of the debugging sections we are interested
2223 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *vnames
)
2225 const struct dwarf2_debug_sections
*names
;
2226 flagword aflag
= bfd_get_section_flags (abfd
, sectp
);
2229 names
= &dwarf2_elf_names
;
2231 names
= (const struct dwarf2_debug_sections
*) vnames
;
2233 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
2236 else if (section_is_p (sectp
->name
, &names
->info
))
2238 dwarf2_per_objfile
->info
.s
.section
= sectp
;
2239 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
2241 else if (section_is_p (sectp
->name
, &names
->abbrev
))
2243 dwarf2_per_objfile
->abbrev
.s
.section
= sectp
;
2244 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
2246 else if (section_is_p (sectp
->name
, &names
->line
))
2248 dwarf2_per_objfile
->line
.s
.section
= sectp
;
2249 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
2251 else if (section_is_p (sectp
->name
, &names
->loc
))
2253 dwarf2_per_objfile
->loc
.s
.section
= sectp
;
2254 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
2256 else if (section_is_p (sectp
->name
, &names
->loclists
))
2258 dwarf2_per_objfile
->loclists
.s
.section
= sectp
;
2259 dwarf2_per_objfile
->loclists
.size
= bfd_get_section_size (sectp
);
2261 else if (section_is_p (sectp
->name
, &names
->macinfo
))
2263 dwarf2_per_objfile
->macinfo
.s
.section
= sectp
;
2264 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
2266 else if (section_is_p (sectp
->name
, &names
->macro
))
2268 dwarf2_per_objfile
->macro
.s
.section
= sectp
;
2269 dwarf2_per_objfile
->macro
.size
= bfd_get_section_size (sectp
);
2271 else if (section_is_p (sectp
->name
, &names
->str
))
2273 dwarf2_per_objfile
->str
.s
.section
= sectp
;
2274 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
2276 else if (section_is_p (sectp
->name
, &names
->line_str
))
2278 dwarf2_per_objfile
->line_str
.s
.section
= sectp
;
2279 dwarf2_per_objfile
->line_str
.size
= bfd_get_section_size (sectp
);
2281 else if (section_is_p (sectp
->name
, &names
->addr
))
2283 dwarf2_per_objfile
->addr
.s
.section
= sectp
;
2284 dwarf2_per_objfile
->addr
.size
= bfd_get_section_size (sectp
);
2286 else if (section_is_p (sectp
->name
, &names
->frame
))
2288 dwarf2_per_objfile
->frame
.s
.section
= sectp
;
2289 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
2291 else if (section_is_p (sectp
->name
, &names
->eh_frame
))
2293 dwarf2_per_objfile
->eh_frame
.s
.section
= sectp
;
2294 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
2296 else if (section_is_p (sectp
->name
, &names
->ranges
))
2298 dwarf2_per_objfile
->ranges
.s
.section
= sectp
;
2299 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
2301 else if (section_is_p (sectp
->name
, &names
->rnglists
))
2303 dwarf2_per_objfile
->rnglists
.s
.section
= sectp
;
2304 dwarf2_per_objfile
->rnglists
.size
= bfd_get_section_size (sectp
);
2306 else if (section_is_p (sectp
->name
, &names
->types
))
2308 struct dwarf2_section_info type_section
;
2310 memset (&type_section
, 0, sizeof (type_section
));
2311 type_section
.s
.section
= sectp
;
2312 type_section
.size
= bfd_get_section_size (sectp
);
2314 VEC_safe_push (dwarf2_section_info_def
, dwarf2_per_objfile
->types
,
2317 else if (section_is_p (sectp
->name
, &names
->gdb_index
))
2319 dwarf2_per_objfile
->gdb_index
.s
.section
= sectp
;
2320 dwarf2_per_objfile
->gdb_index
.size
= bfd_get_section_size (sectp
);
2323 if ((bfd_get_section_flags (abfd
, sectp
) & (SEC_LOAD
| SEC_ALLOC
))
2324 && bfd_section_vma (abfd
, sectp
) == 0)
2325 dwarf2_per_objfile
->has_section_at_zero
= 1;
2328 /* A helper function that decides whether a section is empty,
2332 dwarf2_section_empty_p (const struct dwarf2_section_info
*section
)
2334 if (section
->is_virtual
)
2335 return section
->size
== 0;
2336 return section
->s
.section
== NULL
|| section
->size
== 0;
2339 /* Read the contents of the section INFO.
2340 OBJFILE is the main object file, but not necessarily the file where
2341 the section comes from. E.g., for DWO files the bfd of INFO is the bfd
2343 If the section is compressed, uncompress it before returning. */
2346 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
2350 gdb_byte
*buf
, *retbuf
;
2354 info
->buffer
= NULL
;
2357 if (dwarf2_section_empty_p (info
))
2360 sectp
= get_section_bfd_section (info
);
2362 /* If this is a virtual section we need to read in the real one first. */
2363 if (info
->is_virtual
)
2365 struct dwarf2_section_info
*containing_section
=
2366 get_containing_section (info
);
2368 gdb_assert (sectp
!= NULL
);
2369 if ((sectp
->flags
& SEC_RELOC
) != 0)
2371 error (_("Dwarf Error: DWP format V2 with relocations is not"
2372 " supported in section %s [in module %s]"),
2373 get_section_name (info
), get_section_file_name (info
));
2375 dwarf2_read_section (objfile
, containing_section
);
2376 /* Other code should have already caught virtual sections that don't
2378 gdb_assert (info
->virtual_offset
+ info
->size
2379 <= containing_section
->size
);
2380 /* If the real section is empty or there was a problem reading the
2381 section we shouldn't get here. */
2382 gdb_assert (containing_section
->buffer
!= NULL
);
2383 info
->buffer
= containing_section
->buffer
+ info
->virtual_offset
;
2387 /* If the section has relocations, we must read it ourselves.
2388 Otherwise we attach it to the BFD. */
2389 if ((sectp
->flags
& SEC_RELOC
) == 0)
2391 info
->buffer
= gdb_bfd_map_section (sectp
, &info
->size
);
2395 buf
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
2398 /* When debugging .o files, we may need to apply relocations; see
2399 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
2400 We never compress sections in .o files, so we only need to
2401 try this when the section is not compressed. */
2402 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
2405 info
->buffer
= retbuf
;
2409 abfd
= get_section_bfd_owner (info
);
2410 gdb_assert (abfd
!= NULL
);
2412 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
2413 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
2415 error (_("Dwarf Error: Can't read DWARF data"
2416 " in section %s [in module %s]"),
2417 bfd_section_name (abfd
, sectp
), bfd_get_filename (abfd
));
2421 /* A helper function that returns the size of a section in a safe way.
2422 If you are positive that the section has been read before using the
2423 size, then it is safe to refer to the dwarf2_section_info object's
2424 "size" field directly. In other cases, you must call this
2425 function, because for compressed sections the size field is not set
2426 correctly until the section has been read. */
2428 static bfd_size_type
2429 dwarf2_section_size (struct objfile
*objfile
,
2430 struct dwarf2_section_info
*info
)
2433 dwarf2_read_section (objfile
, info
);
2437 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2441 dwarf2_get_section_info (struct objfile
*objfile
,
2442 enum dwarf2_section_enum sect
,
2443 asection
**sectp
, const gdb_byte
**bufp
,
2444 bfd_size_type
*sizep
)
2446 struct dwarf2_per_objfile
*data
2447 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
2448 dwarf2_objfile_data_key
);
2449 struct dwarf2_section_info
*info
;
2451 /* We may see an objfile without any DWARF, in which case we just
2462 case DWARF2_DEBUG_FRAME
:
2463 info
= &data
->frame
;
2465 case DWARF2_EH_FRAME
:
2466 info
= &data
->eh_frame
;
2469 gdb_assert_not_reached ("unexpected section");
2472 dwarf2_read_section (objfile
, info
);
2474 *sectp
= get_section_bfd_section (info
);
2475 *bufp
= info
->buffer
;
2476 *sizep
= info
->size
;
2479 /* A helper function to find the sections for a .dwz file. */
2482 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2484 struct dwz_file
*dwz_file
= (struct dwz_file
*) arg
;
2486 /* Note that we only support the standard ELF names, because .dwz
2487 is ELF-only (at the time of writing). */
2488 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2490 dwz_file
->abbrev
.s
.section
= sectp
;
2491 dwz_file
->abbrev
.size
= bfd_get_section_size (sectp
);
2493 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2495 dwz_file
->info
.s
.section
= sectp
;
2496 dwz_file
->info
.size
= bfd_get_section_size (sectp
);
2498 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2500 dwz_file
->str
.s
.section
= sectp
;
2501 dwz_file
->str
.size
= bfd_get_section_size (sectp
);
2503 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2505 dwz_file
->line
.s
.section
= sectp
;
2506 dwz_file
->line
.size
= bfd_get_section_size (sectp
);
2508 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2510 dwz_file
->macro
.s
.section
= sectp
;
2511 dwz_file
->macro
.size
= bfd_get_section_size (sectp
);
2513 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2515 dwz_file
->gdb_index
.s
.section
= sectp
;
2516 dwz_file
->gdb_index
.size
= bfd_get_section_size (sectp
);
2520 /* Open the separate '.dwz' debug file, if needed. Return NULL if
2521 there is no .gnu_debugaltlink section in the file. Error if there
2522 is such a section but the file cannot be found. */
2524 static struct dwz_file
*
2525 dwarf2_get_dwz_file (void)
2528 struct cleanup
*cleanup
;
2529 const char *filename
;
2530 struct dwz_file
*result
;
2531 bfd_size_type buildid_len_arg
;
2535 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2536 return dwarf2_per_objfile
->dwz_file
;
2538 bfd_set_error (bfd_error_no_error
);
2539 data
= bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2540 &buildid_len_arg
, &buildid
);
2543 if (bfd_get_error () == bfd_error_no_error
)
2545 error (_("could not read '.gnu_debugaltlink' section: %s"),
2546 bfd_errmsg (bfd_get_error ()));
2548 cleanup
= make_cleanup (xfree
, data
);
2549 make_cleanup (xfree
, buildid
);
2551 buildid_len
= (size_t) buildid_len_arg
;
2553 filename
= (const char *) data
;
2554 if (!IS_ABSOLUTE_PATH (filename
))
2556 char *abs
= gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2559 make_cleanup (xfree
, abs
);
2560 abs
= ldirname (abs
);
2561 make_cleanup (xfree
, abs
);
2563 rel
= concat (abs
, SLASH_STRING
, filename
, (char *) NULL
);
2564 make_cleanup (xfree
, rel
);
2568 /* First try the file name given in the section. If that doesn't
2569 work, try to use the build-id instead. */
2570 gdb_bfd_ref_ptr
dwz_bfd (gdb_bfd_open (filename
, gnutarget
, -1));
2571 if (dwz_bfd
!= NULL
)
2573 if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2577 if (dwz_bfd
== NULL
)
2578 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2580 if (dwz_bfd
== NULL
)
2581 error (_("could not find '.gnu_debugaltlink' file for %s"),
2582 objfile_name (dwarf2_per_objfile
->objfile
));
2584 result
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
2586 result
->dwz_bfd
= dwz_bfd
.release ();
2588 bfd_map_over_sections (result
->dwz_bfd
, locate_dwz_sections
, result
);
2590 do_cleanups (cleanup
);
2592 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, result
->dwz_bfd
);
2593 dwarf2_per_objfile
->dwz_file
= result
;
2597 /* DWARF quick_symbols_functions support. */
2599 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2600 unique line tables, so we maintain a separate table of all .debug_line
2601 derived entries to support the sharing.
2602 All the quick functions need is the list of file names. We discard the
2603 line_header when we're done and don't need to record it here. */
2604 struct quick_file_names
2606 /* The data used to construct the hash key. */
2607 struct stmt_list_hash hash
;
2609 /* The number of entries in file_names, real_names. */
2610 unsigned int num_file_names
;
2612 /* The file names from the line table, after being run through
2614 const char **file_names
;
2616 /* The file names from the line table after being run through
2617 gdb_realpath. These are computed lazily. */
2618 const char **real_names
;
2621 /* When using the index (and thus not using psymtabs), each CU has an
2622 object of this type. This is used to hold information needed by
2623 the various "quick" methods. */
2624 struct dwarf2_per_cu_quick_data
2626 /* The file table. This can be NULL if there was no file table
2627 or it's currently not read in.
2628 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2629 struct quick_file_names
*file_names
;
2631 /* The corresponding symbol table. This is NULL if symbols for this
2632 CU have not yet been read. */
2633 struct compunit_symtab
*compunit_symtab
;
2635 /* A temporary mark bit used when iterating over all CUs in
2636 expand_symtabs_matching. */
2637 unsigned int mark
: 1;
2639 /* True if we've tried to read the file table and found there isn't one.
2640 There will be no point in trying to read it again next time. */
2641 unsigned int no_file_data
: 1;
2644 /* Utility hash function for a stmt_list_hash. */
2647 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2651 if (stmt_list_hash
->dwo_unit
!= NULL
)
2652 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2653 v
+= stmt_list_hash
->line_offset
.sect_off
;
2657 /* Utility equality function for a stmt_list_hash. */
2660 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2661 const struct stmt_list_hash
*rhs
)
2663 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2665 if (lhs
->dwo_unit
!= NULL
2666 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2669 return lhs
->line_offset
.sect_off
== rhs
->line_offset
.sect_off
;
2672 /* Hash function for a quick_file_names. */
2675 hash_file_name_entry (const void *e
)
2677 const struct quick_file_names
*file_data
2678 = (const struct quick_file_names
*) e
;
2680 return hash_stmt_list_entry (&file_data
->hash
);
2683 /* Equality function for a quick_file_names. */
2686 eq_file_name_entry (const void *a
, const void *b
)
2688 const struct quick_file_names
*ea
= (const struct quick_file_names
*) a
;
2689 const struct quick_file_names
*eb
= (const struct quick_file_names
*) b
;
2691 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2694 /* Delete function for a quick_file_names. */
2697 delete_file_name_entry (void *e
)
2699 struct quick_file_names
*file_data
= (struct quick_file_names
*) e
;
2702 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2704 xfree ((void*) file_data
->file_names
[i
]);
2705 if (file_data
->real_names
)
2706 xfree ((void*) file_data
->real_names
[i
]);
2709 /* The space for the struct itself lives on objfile_obstack,
2710 so we don't free it here. */
2713 /* Create a quick_file_names hash table. */
2716 create_quick_file_names_table (unsigned int nr_initial_entries
)
2718 return htab_create_alloc (nr_initial_entries
,
2719 hash_file_name_entry
, eq_file_name_entry
,
2720 delete_file_name_entry
, xcalloc
, xfree
);
2723 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2724 have to be created afterwards. You should call age_cached_comp_units after
2725 processing PER_CU->CU. dw2_setup must have been already called. */
2728 load_cu (struct dwarf2_per_cu_data
*per_cu
)
2730 if (per_cu
->is_debug_types
)
2731 load_full_type_unit (per_cu
);
2733 load_full_comp_unit (per_cu
, language_minimal
);
2735 if (per_cu
->cu
== NULL
)
2736 return; /* Dummy CU. */
2738 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2741 /* Read in the symbols for PER_CU. */
2744 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2746 struct cleanup
*back_to
;
2748 /* Skip type_unit_groups, reading the type units they contain
2749 is handled elsewhere. */
2750 if (IS_TYPE_UNIT_GROUP (per_cu
))
2753 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
2755 if (dwarf2_per_objfile
->using_index
2756 ? per_cu
->v
.quick
->compunit_symtab
== NULL
2757 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2759 queue_comp_unit (per_cu
, language_minimal
);
2762 /* If we just loaded a CU from a DWO, and we're working with an index
2763 that may badly handle TUs, load all the TUs in that DWO as well.
2764 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2765 if (!per_cu
->is_debug_types
2766 && per_cu
->cu
!= NULL
2767 && per_cu
->cu
->dwo_unit
!= NULL
2768 && dwarf2_per_objfile
->index_table
!= NULL
2769 && dwarf2_per_objfile
->index_table
->version
<= 7
2770 /* DWP files aren't supported yet. */
2771 && get_dwp_file () == NULL
)
2772 queue_and_load_all_dwo_tus (per_cu
);
2777 /* Age the cache, releasing compilation units that have not
2778 been used recently. */
2779 age_cached_comp_units ();
2781 do_cleanups (back_to
);
2784 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2785 the objfile from which this CU came. Returns the resulting symbol
2788 static struct compunit_symtab
*
2789 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2791 gdb_assert (dwarf2_per_objfile
->using_index
);
2792 if (!per_cu
->v
.quick
->compunit_symtab
)
2794 struct cleanup
*back_to
= make_cleanup (free_cached_comp_units
, NULL
);
2795 increment_reading_symtab ();
2796 dw2_do_instantiate_symtab (per_cu
);
2797 process_cu_includes ();
2798 do_cleanups (back_to
);
2801 return per_cu
->v
.quick
->compunit_symtab
;
2804 /* Return the CU/TU given its index.
2806 This is intended for loops like:
2808 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2809 + dwarf2_per_objfile->n_type_units); ++i)
2811 struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i);
2817 static struct dwarf2_per_cu_data
*
2818 dw2_get_cutu (int index
)
2820 if (index
>= dwarf2_per_objfile
->n_comp_units
)
2822 index
-= dwarf2_per_objfile
->n_comp_units
;
2823 gdb_assert (index
< dwarf2_per_objfile
->n_type_units
);
2824 return &dwarf2_per_objfile
->all_type_units
[index
]->per_cu
;
2827 return dwarf2_per_objfile
->all_comp_units
[index
];
2830 /* Return the CU given its index.
2831 This differs from dw2_get_cutu in that it's for when you know INDEX
2834 static struct dwarf2_per_cu_data
*
2835 dw2_get_cu (int index
)
2837 gdb_assert (index
>= 0 && index
< dwarf2_per_objfile
->n_comp_units
);
2839 return dwarf2_per_objfile
->all_comp_units
[index
];
2842 /* A helper for create_cus_from_index that handles a given list of
2846 create_cus_from_index_list (struct objfile
*objfile
,
2847 const gdb_byte
*cu_list
, offset_type n_elements
,
2848 struct dwarf2_section_info
*section
,
2854 for (i
= 0; i
< n_elements
; i
+= 2)
2856 struct dwarf2_per_cu_data
*the_cu
;
2857 ULONGEST offset
, length
;
2859 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2860 offset
= extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2861 length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2864 the_cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2865 struct dwarf2_per_cu_data
);
2866 the_cu
->offset
.sect_off
= offset
;
2867 the_cu
->length
= length
;
2868 the_cu
->objfile
= objfile
;
2869 the_cu
->section
= section
;
2870 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2871 struct dwarf2_per_cu_quick_data
);
2872 the_cu
->is_dwz
= is_dwz
;
2873 dwarf2_per_objfile
->all_comp_units
[base_offset
+ i
/ 2] = the_cu
;
2877 /* Read the CU list from the mapped index, and use it to create all
2878 the CU objects for this objfile. */
2881 create_cus_from_index (struct objfile
*objfile
,
2882 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
2883 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
2885 struct dwz_file
*dwz
;
2887 dwarf2_per_objfile
->n_comp_units
= (cu_list_elements
+ dwz_elements
) / 2;
2888 dwarf2_per_objfile
->all_comp_units
=
2889 XOBNEWVEC (&objfile
->objfile_obstack
, struct dwarf2_per_cu_data
*,
2890 dwarf2_per_objfile
->n_comp_units
);
2892 create_cus_from_index_list (objfile
, cu_list
, cu_list_elements
,
2893 &dwarf2_per_objfile
->info
, 0, 0);
2895 if (dwz_elements
== 0)
2898 dwz
= dwarf2_get_dwz_file ();
2899 create_cus_from_index_list (objfile
, dwz_list
, dwz_elements
, &dwz
->info
, 1,
2900 cu_list_elements
/ 2);
2903 /* Create the signatured type hash table from the index. */
2906 create_signatured_type_table_from_index (struct objfile
*objfile
,
2907 struct dwarf2_section_info
*section
,
2908 const gdb_byte
*bytes
,
2909 offset_type elements
)
2912 htab_t sig_types_hash
;
2914 dwarf2_per_objfile
->n_type_units
2915 = dwarf2_per_objfile
->n_allocated_type_units
2917 dwarf2_per_objfile
->all_type_units
=
2918 XNEWVEC (struct signatured_type
*, dwarf2_per_objfile
->n_type_units
);
2920 sig_types_hash
= allocate_signatured_type_table (objfile
);
2922 for (i
= 0; i
< elements
; i
+= 3)
2924 struct signatured_type
*sig_type
;
2925 ULONGEST offset
, type_offset_in_tu
, signature
;
2928 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2929 offset
= extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
2930 type_offset_in_tu
= extract_unsigned_integer (bytes
+ 8, 8,
2932 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
2935 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2936 struct signatured_type
);
2937 sig_type
->signature
= signature
;
2938 sig_type
->type_offset_in_tu
.cu_off
= type_offset_in_tu
;
2939 sig_type
->per_cu
.is_debug_types
= 1;
2940 sig_type
->per_cu
.section
= section
;
2941 sig_type
->per_cu
.offset
.sect_off
= offset
;
2942 sig_type
->per_cu
.objfile
= objfile
;
2943 sig_type
->per_cu
.v
.quick
2944 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2945 struct dwarf2_per_cu_quick_data
);
2947 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
2950 dwarf2_per_objfile
->all_type_units
[i
/ 3] = sig_type
;
2953 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
2956 /* Read the address map data from the mapped index, and use it to
2957 populate the objfile's psymtabs_addrmap. */
2960 create_addrmap_from_index (struct objfile
*objfile
, struct mapped_index
*index
)
2962 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2963 const gdb_byte
*iter
, *end
;
2964 struct obstack temp_obstack
;
2965 struct addrmap
*mutable_map
;
2966 struct cleanup
*cleanup
;
2969 obstack_init (&temp_obstack
);
2970 cleanup
= make_cleanup_obstack_free (&temp_obstack
);
2971 mutable_map
= addrmap_create_mutable (&temp_obstack
);
2973 iter
= index
->address_table
;
2974 end
= iter
+ index
->address_table_size
;
2976 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2980 ULONGEST hi
, lo
, cu_index
;
2981 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2983 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2985 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
2990 complaint (&symfile_complaints
,
2991 _(".gdb_index address table has invalid range (%s - %s)"),
2992 hex_string (lo
), hex_string (hi
));
2996 if (cu_index
>= dwarf2_per_objfile
->n_comp_units
)
2998 complaint (&symfile_complaints
,
2999 _(".gdb_index address table has invalid CU number %u"),
3000 (unsigned) cu_index
);
3004 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
);
3005 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
);
3006 addrmap_set_empty (mutable_map
, lo
, hi
- 1, dw2_get_cutu (cu_index
));
3009 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
3010 &objfile
->objfile_obstack
);
3011 do_cleanups (cleanup
);
3014 /* The hash function for strings in the mapped index. This is the same as
3015 SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the
3016 implementation. This is necessary because the hash function is tied to the
3017 format of the mapped index file. The hash values do not have to match with
3020 Use INT_MAX for INDEX_VERSION if you generate the current index format. */
3023 mapped_index_string_hash (int index_version
, const void *p
)
3025 const unsigned char *str
= (const unsigned char *) p
;
3029 while ((c
= *str
++) != 0)
3031 if (index_version
>= 5)
3033 r
= r
* 67 + c
- 113;
3039 /* Find a slot in the mapped index INDEX for the object named NAME.
3040 If NAME is found, set *VEC_OUT to point to the CU vector in the
3041 constant pool and return 1. If NAME cannot be found, return 0. */
3044 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
3045 offset_type
**vec_out
)
3047 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
3049 offset_type slot
, step
;
3050 int (*cmp
) (const char *, const char *);
3052 if (current_language
->la_language
== language_cplus
3053 || current_language
->la_language
== language_fortran
3054 || current_language
->la_language
== language_d
)
3056 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
3059 if (strchr (name
, '(') != NULL
)
3061 char *without_params
= cp_remove_params (name
);
3063 if (without_params
!= NULL
)
3065 make_cleanup (xfree
, without_params
);
3066 name
= without_params
;
3071 /* Index version 4 did not support case insensitive searches. But the
3072 indices for case insensitive languages are built in lowercase, therefore
3073 simulate our NAME being searched is also lowercased. */
3074 hash
= mapped_index_string_hash ((index
->version
== 4
3075 && case_sensitivity
== case_sensitive_off
3076 ? 5 : index
->version
),
3079 slot
= hash
& (index
->symbol_table_slots
- 1);
3080 step
= ((hash
* 17) & (index
->symbol_table_slots
- 1)) | 1;
3081 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
3085 /* Convert a slot number to an offset into the table. */
3086 offset_type i
= 2 * slot
;
3088 if (index
->symbol_table
[i
] == 0 && index
->symbol_table
[i
+ 1] == 0)
3090 do_cleanups (back_to
);
3094 str
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[i
]);
3095 if (!cmp (name
, str
))
3097 *vec_out
= (offset_type
*) (index
->constant_pool
3098 + MAYBE_SWAP (index
->symbol_table
[i
+ 1]));
3099 do_cleanups (back_to
);
3103 slot
= (slot
+ step
) & (index
->symbol_table_slots
- 1);
3107 /* A helper function that reads the .gdb_index from SECTION and fills
3108 in MAP. FILENAME is the name of the file containing the section;
3109 it is used for error reporting. DEPRECATED_OK is nonzero if it is
3110 ok to use deprecated sections.
3112 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
3113 out parameters that are filled in with information about the CU and
3114 TU lists in the section.
3116 Returns 1 if all went well, 0 otherwise. */
3119 read_index_from_section (struct objfile
*objfile
,
3120 const char *filename
,
3122 struct dwarf2_section_info
*section
,
3123 struct mapped_index
*map
,
3124 const gdb_byte
**cu_list
,
3125 offset_type
*cu_list_elements
,
3126 const gdb_byte
**types_list
,
3127 offset_type
*types_list_elements
)
3129 const gdb_byte
*addr
;
3130 offset_type version
;
3131 offset_type
*metadata
;
3134 if (dwarf2_section_empty_p (section
))
3137 /* Older elfutils strip versions could keep the section in the main
3138 executable while splitting it for the separate debug info file. */
3139 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
3142 dwarf2_read_section (objfile
, section
);
3144 addr
= section
->buffer
;
3145 /* Version check. */
3146 version
= MAYBE_SWAP (*(offset_type
*) addr
);
3147 /* Versions earlier than 3 emitted every copy of a psymbol. This
3148 causes the index to behave very poorly for certain requests. Version 3
3149 contained incomplete addrmap. So, it seems better to just ignore such
3153 static int warning_printed
= 0;
3154 if (!warning_printed
)
3156 warning (_("Skipping obsolete .gdb_index section in %s."),
3158 warning_printed
= 1;
3162 /* Index version 4 uses a different hash function than index version
3165 Versions earlier than 6 did not emit psymbols for inlined
3166 functions. Using these files will cause GDB not to be able to
3167 set breakpoints on inlined functions by name, so we ignore these
3168 indices unless the user has done
3169 "set use-deprecated-index-sections on". */
3170 if (version
< 6 && !deprecated_ok
)
3172 static int warning_printed
= 0;
3173 if (!warning_printed
)
3176 Skipping deprecated .gdb_index section in %s.\n\
3177 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3178 to use the section anyway."),
3180 warning_printed
= 1;
3184 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3185 of the TU (for symbols coming from TUs),
3186 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3187 Plus gold-generated indices can have duplicate entries for global symbols,
3188 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3189 These are just performance bugs, and we can't distinguish gdb-generated
3190 indices from gold-generated ones, so issue no warning here. */
3192 /* Indexes with higher version than the one supported by GDB may be no
3193 longer backward compatible. */
3197 map
->version
= version
;
3198 map
->total_size
= section
->size
;
3200 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3203 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3204 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3208 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3209 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3210 - MAYBE_SWAP (metadata
[i
]))
3214 map
->address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3215 map
->address_table_size
= (MAYBE_SWAP (metadata
[i
+ 1])
3216 - MAYBE_SWAP (metadata
[i
]));
3219 map
->symbol_table
= (offset_type
*) (addr
+ MAYBE_SWAP (metadata
[i
]));
3220 map
->symbol_table_slots
= ((MAYBE_SWAP (metadata
[i
+ 1])
3221 - MAYBE_SWAP (metadata
[i
]))
3222 / (2 * sizeof (offset_type
)));
3225 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3231 /* Read the index file. If everything went ok, initialize the "quick"
3232 elements of all the CUs and return 1. Otherwise, return 0. */
3235 dwarf2_read_index (struct objfile
*objfile
)
3237 struct mapped_index local_map
, *map
;
3238 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3239 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3240 struct dwz_file
*dwz
;
3242 if (!read_index_from_section (objfile
, objfile_name (objfile
),
3243 use_deprecated_index_sections
,
3244 &dwarf2_per_objfile
->gdb_index
, &local_map
,
3245 &cu_list
, &cu_list_elements
,
3246 &types_list
, &types_list_elements
))
3249 /* Don't use the index if it's empty. */
3250 if (local_map
.symbol_table_slots
== 0)
3253 /* If there is a .dwz file, read it so we can get its CU list as
3255 dwz
= dwarf2_get_dwz_file ();
3258 struct mapped_index dwz_map
;
3259 const gdb_byte
*dwz_types_ignore
;
3260 offset_type dwz_types_elements_ignore
;
3262 if (!read_index_from_section (objfile
, bfd_get_filename (dwz
->dwz_bfd
),
3264 &dwz
->gdb_index
, &dwz_map
,
3265 &dwz_list
, &dwz_list_elements
,
3267 &dwz_types_elements_ignore
))
3269 warning (_("could not read '.gdb_index' section from %s; skipping"),
3270 bfd_get_filename (dwz
->dwz_bfd
));
3275 create_cus_from_index (objfile
, cu_list
, cu_list_elements
, dwz_list
,
3278 if (types_list_elements
)
3280 struct dwarf2_section_info
*section
;
3282 /* We can only handle a single .debug_types when we have an
3284 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
3287 section
= VEC_index (dwarf2_section_info_def
,
3288 dwarf2_per_objfile
->types
, 0);
3290 create_signatured_type_table_from_index (objfile
, section
, types_list
,
3291 types_list_elements
);
3294 create_addrmap_from_index (objfile
, &local_map
);
3296 map
= XOBNEW (&objfile
->objfile_obstack
, struct mapped_index
);
3299 dwarf2_per_objfile
->index_table
= map
;
3300 dwarf2_per_objfile
->using_index
= 1;
3301 dwarf2_per_objfile
->quick_file_names_table
=
3302 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
3307 /* A helper for the "quick" functions which sets the global
3308 dwarf2_per_objfile according to OBJFILE. */
3311 dw2_setup (struct objfile
*objfile
)
3313 dwarf2_per_objfile
= ((struct dwarf2_per_objfile
*)
3314 objfile_data (objfile
, dwarf2_objfile_data_key
));
3315 gdb_assert (dwarf2_per_objfile
);
3318 /* die_reader_func for dw2_get_file_names. */
3321 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3322 const gdb_byte
*info_ptr
,
3323 struct die_info
*comp_unit_die
,
3327 struct dwarf2_cu
*cu
= reader
->cu
;
3328 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3329 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3330 struct dwarf2_per_cu_data
*lh_cu
;
3331 struct line_header
*lh
;
3332 struct attribute
*attr
;
3334 const char *name
, *comp_dir
;
3336 struct quick_file_names
*qfn
;
3337 unsigned int line_offset
;
3339 gdb_assert (! this_cu
->is_debug_types
);
3341 /* Our callers never want to match partial units -- instead they
3342 will match the enclosing full CU. */
3343 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3345 this_cu
->v
.quick
->no_file_data
= 1;
3354 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3357 struct quick_file_names find_entry
;
3359 line_offset
= DW_UNSND (attr
);
3361 /* We may have already read in this line header (TU line header sharing).
3362 If we have we're done. */
3363 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3364 find_entry
.hash
.line_offset
.sect_off
= line_offset
;
3365 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
3366 &find_entry
, INSERT
);
3369 lh_cu
->v
.quick
->file_names
= (struct quick_file_names
*) *slot
;
3373 lh
= dwarf_decode_line_header (line_offset
, cu
);
3377 lh_cu
->v
.quick
->no_file_data
= 1;
3381 qfn
= XOBNEW (&objfile
->objfile_obstack
, struct quick_file_names
);
3382 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3383 qfn
->hash
.line_offset
.sect_off
= line_offset
;
3384 gdb_assert (slot
!= NULL
);
3387 find_file_and_directory (comp_unit_die
, cu
, &name
, &comp_dir
);
3389 qfn
->num_file_names
= lh
->num_file_names
;
3391 XOBNEWVEC (&objfile
->objfile_obstack
, const char *, lh
->num_file_names
);
3392 for (i
= 0; i
< lh
->num_file_names
; ++i
)
3393 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
, comp_dir
);
3394 qfn
->real_names
= NULL
;
3396 free_line_header (lh
);
3398 lh_cu
->v
.quick
->file_names
= qfn
;
3401 /* A helper for the "quick" functions which attempts to read the line
3402 table for THIS_CU. */
3404 static struct quick_file_names
*
3405 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3407 /* This should never be called for TUs. */
3408 gdb_assert (! this_cu
->is_debug_types
);
3409 /* Nor type unit groups. */
3410 gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu
));
3412 if (this_cu
->v
.quick
->file_names
!= NULL
)
3413 return this_cu
->v
.quick
->file_names
;
3414 /* If we know there is no line data, no point in looking again. */
3415 if (this_cu
->v
.quick
->no_file_data
)
3418 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
3420 if (this_cu
->v
.quick
->no_file_data
)
3422 return this_cu
->v
.quick
->file_names
;
3425 /* A helper for the "quick" functions which computes and caches the
3426 real path for a given file name from the line table. */
3429 dw2_get_real_path (struct objfile
*objfile
,
3430 struct quick_file_names
*qfn
, int index
)
3432 if (qfn
->real_names
== NULL
)
3433 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
3434 qfn
->num_file_names
, const char *);
3436 if (qfn
->real_names
[index
] == NULL
)
3437 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]);
3439 return qfn
->real_names
[index
];
3442 static struct symtab
*
3443 dw2_find_last_source_symtab (struct objfile
*objfile
)
3445 struct compunit_symtab
*cust
;
3448 dw2_setup (objfile
);
3449 index
= dwarf2_per_objfile
->n_comp_units
- 1;
3450 cust
= dw2_instantiate_symtab (dw2_get_cutu (index
));
3453 return compunit_primary_filetab (cust
);
3456 /* Traversal function for dw2_forget_cached_source_info. */
3459 dw2_free_cached_file_names (void **slot
, void *info
)
3461 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3463 if (file_data
->real_names
)
3467 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3469 xfree ((void*) file_data
->real_names
[i
]);
3470 file_data
->real_names
[i
] = NULL
;
3478 dw2_forget_cached_source_info (struct objfile
*objfile
)
3480 dw2_setup (objfile
);
3482 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
3483 dw2_free_cached_file_names
, NULL
);
3486 /* Helper function for dw2_map_symtabs_matching_filename that expands
3487 the symtabs and calls the iterator. */
3490 dw2_map_expand_apply (struct objfile
*objfile
,
3491 struct dwarf2_per_cu_data
*per_cu
,
3492 const char *name
, const char *real_path
,
3493 int (*callback
) (struct symtab
*, void *),
3496 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3498 /* Don't visit already-expanded CUs. */
3499 if (per_cu
->v
.quick
->compunit_symtab
)
3502 /* This may expand more than one symtab, and we want to iterate over
3504 dw2_instantiate_symtab (per_cu
);
3506 return iterate_over_some_symtabs (name
, real_path
, callback
, data
,
3507 objfile
->compunit_symtabs
, last_made
);
3510 /* Implementation of the map_symtabs_matching_filename method. */
3513 dw2_map_symtabs_matching_filename (struct objfile
*objfile
, const char *name
,
3514 const char *real_path
,
3515 int (*callback
) (struct symtab
*, void *),
3519 const char *name_basename
= lbasename (name
);
3521 dw2_setup (objfile
);
3523 /* The rule is CUs specify all the files, including those used by
3524 any TU, so there's no need to scan TUs here. */
3526 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3529 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3530 struct quick_file_names
*file_data
;
3532 /* We only need to look at symtabs not already expanded. */
3533 if (per_cu
->v
.quick
->compunit_symtab
)
3536 file_data
= dw2_get_file_names (per_cu
);
3537 if (file_data
== NULL
)
3540 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3542 const char *this_name
= file_data
->file_names
[j
];
3543 const char *this_real_name
;
3545 if (compare_filenames_for_search (this_name
, name
))
3547 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
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 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3559 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3560 if (compare_filenames_for_search (this_real_name
, name
))
3562 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3568 if (real_path
!= NULL
)
3570 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3571 gdb_assert (IS_ABSOLUTE_PATH (name
));
3572 if (this_real_name
!= NULL
3573 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3575 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3587 /* Struct used to manage iterating over all CUs looking for a symbol. */
3589 struct dw2_symtab_iterator
3591 /* The internalized form of .gdb_index. */
3592 struct mapped_index
*index
;
3593 /* If non-zero, only look for symbols that match BLOCK_INDEX. */
3594 int want_specific_block
;
3595 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
3596 Unused if !WANT_SPECIFIC_BLOCK. */
3598 /* The kind of symbol we're looking for. */
3600 /* The list of CUs from the index entry of the symbol,
3601 or NULL if not found. */
3603 /* The next element in VEC to look at. */
3605 /* The number of elements in VEC, or zero if there is no match. */
3607 /* Have we seen a global version of the symbol?
3608 If so we can ignore all further global instances.
3609 This is to work around gold/15646, inefficient gold-generated
3614 /* Initialize the index symtab iterator ITER.
3615 If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols
3616 in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
3619 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3620 struct mapped_index
*index
,
3621 int want_specific_block
,
3626 iter
->index
= index
;
3627 iter
->want_specific_block
= want_specific_block
;
3628 iter
->block_index
= block_index
;
3629 iter
->domain
= domain
;
3631 iter
->global_seen
= 0;
3633 if (find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3634 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3642 /* Return the next matching CU or NULL if there are no more. */
3644 static struct dwarf2_per_cu_data
*
3645 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3647 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3649 offset_type cu_index_and_attrs
=
3650 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3651 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3652 struct dwarf2_per_cu_data
*per_cu
;
3653 int want_static
= iter
->block_index
!= GLOBAL_BLOCK
;
3654 /* This value is only valid for index versions >= 7. */
3655 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3656 gdb_index_symbol_kind symbol_kind
=
3657 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3658 /* Only check the symbol attributes if they're present.
3659 Indices prior to version 7 don't record them,
3660 and indices >= 7 may elide them for certain symbols
3661 (gold does this). */
3663 (iter
->index
->version
>= 7
3664 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3666 /* Don't crash on bad data. */
3667 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
3668 + dwarf2_per_objfile
->n_type_units
))
3670 complaint (&symfile_complaints
,
3671 _(".gdb_index entry has bad CU index"
3673 objfile_name (dwarf2_per_objfile
->objfile
));
3677 per_cu
= dw2_get_cutu (cu_index
);
3679 /* Skip if already read in. */
3680 if (per_cu
->v
.quick
->compunit_symtab
)
3683 /* Check static vs global. */
3686 if (iter
->want_specific_block
3687 && want_static
!= is_static
)
3689 /* Work around gold/15646. */
3690 if (!is_static
&& iter
->global_seen
)
3693 iter
->global_seen
= 1;
3696 /* Only check the symbol's kind if it has one. */
3699 switch (iter
->domain
)
3702 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3703 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3704 /* Some types are also in VAR_DOMAIN. */
3705 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3709 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3713 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3728 static struct compunit_symtab
*
3729 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
3730 const char *name
, domain_enum domain
)
3732 struct compunit_symtab
*stab_best
= NULL
;
3733 struct mapped_index
*index
;
3735 dw2_setup (objfile
);
3737 index
= dwarf2_per_objfile
->index_table
;
3739 /* index is NULL if OBJF_READNOW. */
3742 struct dw2_symtab_iterator iter
;
3743 struct dwarf2_per_cu_data
*per_cu
;
3745 dw2_symtab_iter_init (&iter
, index
, 1, block_index
, domain
, name
);
3747 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3749 struct symbol
*sym
, *with_opaque
= NULL
;
3750 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
);
3751 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
3752 struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
3754 sym
= block_find_symbol (block
, name
, domain
,
3755 block_find_non_opaque_type_preferred
,
3758 /* Some caution must be observed with overloaded functions
3759 and methods, since the index will not contain any overload
3760 information (but NAME might contain it). */
3763 && strcmp_iw (SYMBOL_SEARCH_NAME (sym
), name
) == 0)
3765 if (with_opaque
!= NULL
3766 && strcmp_iw (SYMBOL_SEARCH_NAME (with_opaque
), name
) == 0)
3769 /* Keep looking through other CUs. */
3777 dw2_print_stats (struct objfile
*objfile
)
3779 int i
, total
, count
;
3781 dw2_setup (objfile
);
3782 total
= dwarf2_per_objfile
->n_comp_units
+ dwarf2_per_objfile
->n_type_units
;
3784 for (i
= 0; i
< total
; ++i
)
3786 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3788 if (!per_cu
->v
.quick
->compunit_symtab
)
3791 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
3792 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3795 /* This dumps minimal information about the index.
3796 It is called via "mt print objfiles".
3797 One use is to verify .gdb_index has been loaded by the
3798 gdb.dwarf2/gdb-index.exp testcase. */
3801 dw2_dump (struct objfile
*objfile
)
3803 dw2_setup (objfile
);
3804 gdb_assert (dwarf2_per_objfile
->using_index
);
3805 printf_filtered (".gdb_index:");
3806 if (dwarf2_per_objfile
->index_table
!= NULL
)
3808 printf_filtered (" version %d\n",
3809 dwarf2_per_objfile
->index_table
->version
);
3812 printf_filtered (" faked for \"readnow\"\n");
3813 printf_filtered ("\n");
3817 dw2_relocate (struct objfile
*objfile
,
3818 const struct section_offsets
*new_offsets
,
3819 const struct section_offsets
*delta
)
3821 /* There's nothing to relocate here. */
3825 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
3826 const char *func_name
)
3828 struct mapped_index
*index
;
3830 dw2_setup (objfile
);
3832 index
= dwarf2_per_objfile
->index_table
;
3834 /* index is NULL if OBJF_READNOW. */
3837 struct dw2_symtab_iterator iter
;
3838 struct dwarf2_per_cu_data
*per_cu
;
3840 /* Note: It doesn't matter what we pass for block_index here. */
3841 dw2_symtab_iter_init (&iter
, index
, 0, GLOBAL_BLOCK
, VAR_DOMAIN
,
3844 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3845 dw2_instantiate_symtab (per_cu
);
3850 dw2_expand_all_symtabs (struct objfile
*objfile
)
3854 dw2_setup (objfile
);
3856 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3857 + dwarf2_per_objfile
->n_type_units
); ++i
)
3859 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3861 dw2_instantiate_symtab (per_cu
);
3866 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
3867 const char *fullname
)
3871 dw2_setup (objfile
);
3873 /* We don't need to consider type units here.
3874 This is only called for examining code, e.g. expand_line_sal.
3875 There can be an order of magnitude (or more) more type units
3876 than comp units, and we avoid them if we can. */
3878 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3881 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3882 struct quick_file_names
*file_data
;
3884 /* We only need to look at symtabs not already expanded. */
3885 if (per_cu
->v
.quick
->compunit_symtab
)
3888 file_data
= dw2_get_file_names (per_cu
);
3889 if (file_data
== NULL
)
3892 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3894 const char *this_fullname
= file_data
->file_names
[j
];
3896 if (filename_cmp (this_fullname
, fullname
) == 0)
3898 dw2_instantiate_symtab (per_cu
);
3906 dw2_map_matching_symbols (struct objfile
*objfile
,
3907 const char * name
, domain_enum domain
,
3909 int (*callback
) (struct block
*,
3910 struct symbol
*, void *),
3911 void *data
, symbol_compare_ftype
*match
,
3912 symbol_compare_ftype
*ordered_compare
)
3914 /* Currently unimplemented; used for Ada. The function can be called if the
3915 current language is Ada for a non-Ada objfile using GNU index. As Ada
3916 does not look for non-Ada symbols this function should just return. */
3920 dw2_expand_symtabs_matching
3921 (struct objfile
*objfile
,
3922 expand_symtabs_file_matcher_ftype
*file_matcher
,
3923 expand_symtabs_symbol_matcher_ftype
*symbol_matcher
,
3924 expand_symtabs_exp_notify_ftype
*expansion_notify
,
3925 enum search_domain kind
,
3930 struct mapped_index
*index
;
3932 dw2_setup (objfile
);
3934 /* index_table is NULL if OBJF_READNOW. */
3935 if (!dwarf2_per_objfile
->index_table
)
3937 index
= dwarf2_per_objfile
->index_table
;
3939 if (file_matcher
!= NULL
)
3941 htab_up
visited_found (htab_create_alloc (10, htab_hash_pointer
,
3943 NULL
, xcalloc
, xfree
));
3944 htab_up
visited_not_found (htab_create_alloc (10, htab_hash_pointer
,
3946 NULL
, xcalloc
, xfree
));
3948 /* The rule is CUs specify all the files, including those used by
3949 any TU, so there's no need to scan TUs here. */
3951 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3954 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3955 struct quick_file_names
*file_data
;
3960 per_cu
->v
.quick
->mark
= 0;
3962 /* We only need to look at symtabs not already expanded. */
3963 if (per_cu
->v
.quick
->compunit_symtab
)
3966 file_data
= dw2_get_file_names (per_cu
);
3967 if (file_data
== NULL
)
3970 if (htab_find (visited_not_found
.get (), file_data
) != NULL
)
3972 else if (htab_find (visited_found
.get (), file_data
) != NULL
)
3974 per_cu
->v
.quick
->mark
= 1;
3978 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3980 const char *this_real_name
;
3982 if (file_matcher (file_data
->file_names
[j
], data
, 0))
3984 per_cu
->v
.quick
->mark
= 1;
3988 /* Before we invoke realpath, which can get expensive when many
3989 files are involved, do a quick comparison of the basenames. */
3990 if (!basenames_may_differ
3991 && !file_matcher (lbasename (file_data
->file_names
[j
]),
3995 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3996 if (file_matcher (this_real_name
, data
, 0))
3998 per_cu
->v
.quick
->mark
= 1;
4003 slot
= htab_find_slot (per_cu
->v
.quick
->mark
4004 ? visited_found
.get ()
4005 : visited_not_found
.get (),
4011 for (iter
= 0; iter
< index
->symbol_table_slots
; ++iter
)
4013 offset_type idx
= 2 * iter
;
4015 offset_type
*vec
, vec_len
, vec_idx
;
4016 int global_seen
= 0;
4020 if (index
->symbol_table
[idx
] == 0 && index
->symbol_table
[idx
+ 1] == 0)
4023 name
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[idx
]);
4025 if (! (*symbol_matcher
) (name
, data
))
4028 /* The name was matched, now expand corresponding CUs that were
4030 vec
= (offset_type
*) (index
->constant_pool
4031 + MAYBE_SWAP (index
->symbol_table
[idx
+ 1]));
4032 vec_len
= MAYBE_SWAP (vec
[0]);
4033 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
4035 struct dwarf2_per_cu_data
*per_cu
;
4036 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
4037 /* This value is only valid for index versions >= 7. */
4038 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
4039 gdb_index_symbol_kind symbol_kind
=
4040 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
4041 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
4042 /* Only check the symbol attributes if they're present.
4043 Indices prior to version 7 don't record them,
4044 and indices >= 7 may elide them for certain symbols
4045 (gold does this). */
4047 (index
->version
>= 7
4048 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
4050 /* Work around gold/15646. */
4053 if (!is_static
&& global_seen
)
4059 /* Only check the symbol's kind if it has one. */
4064 case VARIABLES_DOMAIN
:
4065 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
4068 case FUNCTIONS_DOMAIN
:
4069 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
4073 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4081 /* Don't crash on bad data. */
4082 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
4083 + dwarf2_per_objfile
->n_type_units
))
4085 complaint (&symfile_complaints
,
4086 _(".gdb_index entry has bad CU index"
4087 " [in module %s]"), objfile_name (objfile
));
4091 per_cu
= dw2_get_cutu (cu_index
);
4092 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
4094 int symtab_was_null
=
4095 (per_cu
->v
.quick
->compunit_symtab
== NULL
);
4097 dw2_instantiate_symtab (per_cu
);
4099 if (expansion_notify
!= NULL
4101 && per_cu
->v
.quick
->compunit_symtab
!= NULL
)
4103 expansion_notify (per_cu
->v
.quick
->compunit_symtab
,
4111 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
4114 static struct compunit_symtab
*
4115 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
4120 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
4121 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
4124 if (cust
->includes
== NULL
)
4127 for (i
= 0; cust
->includes
[i
]; ++i
)
4129 struct compunit_symtab
*s
= cust
->includes
[i
];
4131 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
4139 static struct compunit_symtab
*
4140 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
4141 struct bound_minimal_symbol msymbol
,
4143 struct obj_section
*section
,
4146 struct dwarf2_per_cu_data
*data
;
4147 struct compunit_symtab
*result
;
4149 dw2_setup (objfile
);
4151 if (!objfile
->psymtabs_addrmap
)
4154 data
= (struct dwarf2_per_cu_data
*) addrmap_find (objfile
->psymtabs_addrmap
,
4159 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
4160 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
4161 paddress (get_objfile_arch (objfile
), pc
));
4164 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
),
4166 gdb_assert (result
!= NULL
);
4171 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
4172 void *data
, int need_fullname
)
4175 htab_up
visited (htab_create_alloc (10, htab_hash_pointer
, htab_eq_pointer
,
4176 NULL
, xcalloc
, xfree
));
4178 dw2_setup (objfile
);
4180 /* The rule is CUs specify all the files, including those used by
4181 any TU, so there's no need to scan TUs here.
4182 We can ignore file names coming from already-expanded CUs. */
4184 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4186 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4188 if (per_cu
->v
.quick
->compunit_symtab
)
4190 void **slot
= htab_find_slot (visited
.get (),
4191 per_cu
->v
.quick
->file_names
,
4194 *slot
= per_cu
->v
.quick
->file_names
;
4198 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4201 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
4202 struct quick_file_names
*file_data
;
4205 /* We only need to look at symtabs not already expanded. */
4206 if (per_cu
->v
.quick
->compunit_symtab
)
4209 file_data
= dw2_get_file_names (per_cu
);
4210 if (file_data
== NULL
)
4213 slot
= htab_find_slot (visited
.get (), file_data
, INSERT
);
4216 /* Already visited. */
4221 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
4223 const char *this_real_name
;
4226 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
4228 this_real_name
= NULL
;
4229 (*fun
) (file_data
->file_names
[j
], this_real_name
, data
);
4235 dw2_has_symbols (struct objfile
*objfile
)
4240 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
4243 dw2_find_last_source_symtab
,
4244 dw2_forget_cached_source_info
,
4245 dw2_map_symtabs_matching_filename
,
4250 dw2_expand_symtabs_for_function
,
4251 dw2_expand_all_symtabs
,
4252 dw2_expand_symtabs_with_fullname
,
4253 dw2_map_matching_symbols
,
4254 dw2_expand_symtabs_matching
,
4255 dw2_find_pc_sect_compunit_symtab
,
4256 dw2_map_symbol_filenames
4259 /* Initialize for reading DWARF for this objfile. Return 0 if this
4260 file will use psymtabs, or 1 if using the GNU index. */
4263 dwarf2_initialize_objfile (struct objfile
*objfile
)
4265 /* If we're about to read full symbols, don't bother with the
4266 indices. In this case we also don't care if some other debug
4267 format is making psymtabs, because they are all about to be
4269 if ((objfile
->flags
& OBJF_READNOW
))
4273 dwarf2_per_objfile
->using_index
= 1;
4274 create_all_comp_units (objfile
);
4275 create_all_type_units (objfile
);
4276 dwarf2_per_objfile
->quick_file_names_table
=
4277 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
4279 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
4280 + dwarf2_per_objfile
->n_type_units
); ++i
)
4282 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4284 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4285 struct dwarf2_per_cu_quick_data
);
4288 /* Return 1 so that gdb sees the "quick" functions. However,
4289 these functions will be no-ops because we will have expanded
4294 if (dwarf2_read_index (objfile
))
4302 /* Build a partial symbol table. */
4305 dwarf2_build_psymtabs (struct objfile
*objfile
)
4308 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
4310 init_psymbol_list (objfile
, 1024);
4315 /* This isn't really ideal: all the data we allocate on the
4316 objfile's obstack is still uselessly kept around. However,
4317 freeing it seems unsafe. */
4318 psymtab_discarder
psymtabs (objfile
);
4319 dwarf2_build_psymtabs_hard (objfile
);
4322 CATCH (except
, RETURN_MASK_ERROR
)
4324 exception_print (gdb_stderr
, except
);
4329 /* Return the total length of the CU described by HEADER. */
4332 get_cu_length (const struct comp_unit_head
*header
)
4334 return header
->initial_length_size
+ header
->length
;
4337 /* Return TRUE if OFFSET is within CU_HEADER. */
4340 offset_in_cu_p (const struct comp_unit_head
*cu_header
, sect_offset offset
)
4342 sect_offset bottom
= { cu_header
->offset
.sect_off
};
4343 sect_offset top
= { cu_header
->offset
.sect_off
+ get_cu_length (cu_header
) };
4345 return (offset
.sect_off
>= bottom
.sect_off
&& offset
.sect_off
< top
.sect_off
);
4348 /* Find the base address of the compilation unit for range lists and
4349 location lists. It will normally be specified by DW_AT_low_pc.
4350 In DWARF-3 draft 4, the base address could be overridden by
4351 DW_AT_entry_pc. It's been removed, but GCC still uses this for
4352 compilation units with discontinuous ranges. */
4355 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
4357 struct attribute
*attr
;
4360 cu
->base_address
= 0;
4362 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
4365 cu
->base_address
= attr_value_as_address (attr
);
4370 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4373 cu
->base_address
= attr_value_as_address (attr
);
4379 /* Read in the comp unit header information from the debug_info at info_ptr.
4380 Use rcuh_kind::COMPILE as the default type if not known by the caller.
4381 NOTE: This leaves members offset, first_die_offset to be filled in
4384 static const gdb_byte
*
4385 read_comp_unit_head (struct comp_unit_head
*cu_header
,
4386 const gdb_byte
*info_ptr
,
4387 struct dwarf2_section_info
*section
,
4388 rcuh_kind section_kind
)
4391 unsigned int bytes_read
;
4392 const char *filename
= get_section_file_name (section
);
4393 bfd
*abfd
= get_section_bfd_owner (section
);
4395 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
4396 cu_header
->initial_length_size
= bytes_read
;
4397 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
4398 info_ptr
+= bytes_read
;
4399 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
4401 if (cu_header
->version
< 5)
4402 switch (section_kind
)
4404 case rcuh_kind::COMPILE
:
4405 cu_header
->unit_type
= DW_UT_compile
;
4407 case rcuh_kind::TYPE
:
4408 cu_header
->unit_type
= DW_UT_type
;
4411 internal_error (__FILE__
, __LINE__
,
4412 _("read_comp_unit_head: invalid section_kind"));
4416 cu_header
->unit_type
= static_cast<enum dwarf_unit_type
>
4417 (read_1_byte (abfd
, info_ptr
));
4419 switch (cu_header
->unit_type
)
4422 if (section_kind
!= rcuh_kind::COMPILE
)
4423 error (_("Dwarf Error: wrong unit_type in compilation unit header "
4424 "(is DW_UT_compile, should be DW_UT_type) [in module %s]"),
4428 section_kind
= rcuh_kind::TYPE
;
4431 error (_("Dwarf Error: wrong unit_type in compilation unit header "
4432 "(is %d, should be %d or %d) [in module %s]"),
4433 cu_header
->unit_type
, DW_UT_compile
, DW_UT_type
, filename
);
4436 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
4439 cu_header
->abbrev_offset
.sect_off
= read_offset (abfd
, info_ptr
, cu_header
,
4441 info_ptr
+= bytes_read
;
4442 if (cu_header
->version
< 5)
4444 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
4447 signed_addr
= bfd_get_sign_extend_vma (abfd
);
4448 if (signed_addr
< 0)
4449 internal_error (__FILE__
, __LINE__
,
4450 _("read_comp_unit_head: dwarf from non elf file"));
4451 cu_header
->signed_addr_p
= signed_addr
;
4453 if (section_kind
== rcuh_kind::TYPE
)
4455 LONGEST type_offset
;
4457 cu_header
->signature
= read_8_bytes (abfd
, info_ptr
);
4460 type_offset
= read_offset (abfd
, info_ptr
, cu_header
, &bytes_read
);
4461 info_ptr
+= bytes_read
;
4462 cu_header
->type_offset_in_tu
.cu_off
= type_offset
;
4463 if (cu_header
->type_offset_in_tu
.cu_off
!= type_offset
)
4464 error (_("Dwarf Error: Too big type_offset in compilation unit "
4465 "header (is %s) [in module %s]"), plongest (type_offset
),
4472 /* Helper function that returns the proper abbrev section for
4475 static struct dwarf2_section_info
*
4476 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
4478 struct dwarf2_section_info
*abbrev
;
4480 if (this_cu
->is_dwz
)
4481 abbrev
= &dwarf2_get_dwz_file ()->abbrev
;
4483 abbrev
= &dwarf2_per_objfile
->abbrev
;
4488 /* Subroutine of read_and_check_comp_unit_head and
4489 read_and_check_type_unit_head to simplify them.
4490 Perform various error checking on the header. */
4493 error_check_comp_unit_head (struct comp_unit_head
*header
,
4494 struct dwarf2_section_info
*section
,
4495 struct dwarf2_section_info
*abbrev_section
)
4497 const char *filename
= get_section_file_name (section
);
4499 if (header
->version
< 2 || header
->version
> 5)
4500 error (_("Dwarf Error: wrong version in compilation unit header "
4501 "(is %d, should be 2, 3, 4 or 5) [in module %s]"), header
->version
,
4504 if (header
->abbrev_offset
.sect_off
4505 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
4506 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
4507 "(offset 0x%lx + 6) [in module %s]"),
4508 (long) header
->abbrev_offset
.sect_off
, (long) header
->offset
.sect_off
,
4511 /* Cast to unsigned long to use 64-bit arithmetic when possible to
4512 avoid potential 32-bit overflow. */
4513 if (((unsigned long) header
->offset
.sect_off
+ get_cu_length (header
))
4515 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
4516 "(offset 0x%lx + 0) [in module %s]"),
4517 (long) header
->length
, (long) header
->offset
.sect_off
,
4521 /* Read in a CU/TU header and perform some basic error checking.
4522 The contents of the header are stored in HEADER.
4523 The result is a pointer to the start of the first DIE. */
4525 static const gdb_byte
*
4526 read_and_check_comp_unit_head (struct comp_unit_head
*header
,
4527 struct dwarf2_section_info
*section
,
4528 struct dwarf2_section_info
*abbrev_section
,
4529 const gdb_byte
*info_ptr
,
4530 rcuh_kind section_kind
)
4532 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
4533 bfd
*abfd
= get_section_bfd_owner (section
);
4535 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4537 info_ptr
= read_comp_unit_head (header
, info_ptr
, section
, section_kind
);
4539 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4541 error_check_comp_unit_head (header
, section
, abbrev_section
);
4546 /* Fetch the abbreviation table offset from a comp or type unit header. */
4549 read_abbrev_offset (struct dwarf2_section_info
*section
,
4552 bfd
*abfd
= get_section_bfd_owner (section
);
4553 const gdb_byte
*info_ptr
;
4554 unsigned int initial_length_size
, offset_size
;
4555 sect_offset abbrev_offset
;
4558 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
4559 info_ptr
= section
->buffer
+ offset
.sect_off
;
4560 read_initial_length (abfd
, info_ptr
, &initial_length_size
);
4561 offset_size
= initial_length_size
== 4 ? 4 : 8;
4562 info_ptr
+= initial_length_size
;
4564 version
= read_2_bytes (abfd
, info_ptr
);
4568 /* Skip unit type and address size. */
4572 abbrev_offset
.sect_off
= read_offset_1 (abfd
, info_ptr
, offset_size
);
4573 return abbrev_offset
;
4576 /* Allocate a new partial symtab for file named NAME and mark this new
4577 partial symtab as being an include of PST. */
4580 dwarf2_create_include_psymtab (const char *name
, struct partial_symtab
*pst
,
4581 struct objfile
*objfile
)
4583 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
4585 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
4587 /* It shares objfile->objfile_obstack. */
4588 subpst
->dirname
= pst
->dirname
;
4591 subpst
->textlow
= 0;
4592 subpst
->texthigh
= 0;
4594 subpst
->dependencies
4595 = XOBNEW (&objfile
->objfile_obstack
, struct partial_symtab
*);
4596 subpst
->dependencies
[0] = pst
;
4597 subpst
->number_of_dependencies
= 1;
4599 subpst
->globals_offset
= 0;
4600 subpst
->n_global_syms
= 0;
4601 subpst
->statics_offset
= 0;
4602 subpst
->n_static_syms
= 0;
4603 subpst
->compunit_symtab
= NULL
;
4604 subpst
->read_symtab
= pst
->read_symtab
;
4607 /* No private part is necessary for include psymtabs. This property
4608 can be used to differentiate between such include psymtabs and
4609 the regular ones. */
4610 subpst
->read_symtab_private
= NULL
;
4613 /* Read the Line Number Program data and extract the list of files
4614 included by the source file represented by PST. Build an include
4615 partial symtab for each of these included files. */
4618 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
4619 struct die_info
*die
,
4620 struct partial_symtab
*pst
)
4622 struct line_header
*lh
= NULL
;
4623 struct attribute
*attr
;
4625 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
4627 lh
= dwarf_decode_line_header (DW_UNSND (attr
), cu
);
4629 return; /* No linetable, so no includes. */
4631 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
4632 dwarf_decode_lines (lh
, pst
->dirname
, cu
, pst
, pst
->textlow
, 1);
4634 free_line_header (lh
);
4638 hash_signatured_type (const void *item
)
4640 const struct signatured_type
*sig_type
4641 = (const struct signatured_type
*) item
;
4643 /* This drops the top 32 bits of the signature, but is ok for a hash. */
4644 return sig_type
->signature
;
4648 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
4650 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
4651 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
4653 return lhs
->signature
== rhs
->signature
;
4656 /* Allocate a hash table for signatured types. */
4659 allocate_signatured_type_table (struct objfile
*objfile
)
4661 return htab_create_alloc_ex (41,
4662 hash_signatured_type
,
4665 &objfile
->objfile_obstack
,
4666 hashtab_obstack_allocate
,
4667 dummy_obstack_deallocate
);
4670 /* A helper function to add a signatured type CU to a table. */
4673 add_signatured_type_cu_to_table (void **slot
, void *datum
)
4675 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
4676 struct signatured_type
***datap
= (struct signatured_type
***) datum
;
4684 /* A helper for create_debug_types_hash_table. Read types from SECTION
4685 and fill them into TYPES_HTAB. It will process only type units,
4686 therefore DW_UT_type. */
4689 create_debug_type_hash_table (struct dwo_file
*dwo_file
,
4690 dwarf2_section_info
*section
, htab_t
&types_htab
,
4691 rcuh_kind section_kind
)
4693 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4694 struct dwarf2_section_info
*abbrev_section
;
4696 const gdb_byte
*info_ptr
, *end_ptr
;
4698 abbrev_section
= (dwo_file
!= NULL
4699 ? &dwo_file
->sections
.abbrev
4700 : &dwarf2_per_objfile
->abbrev
);
4702 if (dwarf_read_debug
)
4703 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
4704 get_section_name (section
),
4705 get_section_file_name (abbrev_section
));
4707 dwarf2_read_section (objfile
, section
);
4708 info_ptr
= section
->buffer
;
4710 if (info_ptr
== NULL
)
4713 /* We can't set abfd until now because the section may be empty or
4714 not present, in which case the bfd is unknown. */
4715 abfd
= get_section_bfd_owner (section
);
4717 /* We don't use init_cutu_and_read_dies_simple, or some such, here
4718 because we don't need to read any dies: the signature is in the
4721 end_ptr
= info_ptr
+ section
->size
;
4722 while (info_ptr
< end_ptr
)
4725 struct signatured_type
*sig_type
;
4726 struct dwo_unit
*dwo_tu
;
4728 const gdb_byte
*ptr
= info_ptr
;
4729 struct comp_unit_head header
;
4730 unsigned int length
;
4732 offset
.sect_off
= ptr
- section
->buffer
;
4734 /* We need to read the type's signature in order to build the hash
4735 table, but we don't need anything else just yet. */
4737 ptr
= read_and_check_comp_unit_head (&header
, section
,
4738 abbrev_section
, ptr
, section_kind
);
4740 length
= get_cu_length (&header
);
4742 /* Skip dummy type units. */
4743 if (ptr
>= info_ptr
+ length
4744 || peek_abbrev_code (abfd
, ptr
) == 0
4745 || header
.unit_type
!= DW_UT_type
)
4751 if (types_htab
== NULL
)
4754 types_htab
= allocate_dwo_unit_table (objfile
);
4756 types_htab
= allocate_signatured_type_table (objfile
);
4762 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4764 dwo_tu
->dwo_file
= dwo_file
;
4765 dwo_tu
->signature
= header
.signature
;
4766 dwo_tu
->type_offset_in_tu
= header
.type_offset_in_tu
;
4767 dwo_tu
->section
= section
;
4768 dwo_tu
->offset
= offset
;
4769 dwo_tu
->length
= length
;
4773 /* N.B.: type_offset is not usable if this type uses a DWO file.
4774 The real type_offset is in the DWO file. */
4776 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4777 struct signatured_type
);
4778 sig_type
->signature
= header
.signature
;
4779 sig_type
->type_offset_in_tu
= header
.type_offset_in_tu
;
4780 sig_type
->per_cu
.objfile
= objfile
;
4781 sig_type
->per_cu
.is_debug_types
= 1;
4782 sig_type
->per_cu
.section
= section
;
4783 sig_type
->per_cu
.offset
= offset
;
4784 sig_type
->per_cu
.length
= length
;
4787 slot
= htab_find_slot (types_htab
,
4788 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
4790 gdb_assert (slot
!= NULL
);
4793 sect_offset dup_offset
;
4797 const struct dwo_unit
*dup_tu
4798 = (const struct dwo_unit
*) *slot
;
4800 dup_offset
= dup_tu
->offset
;
4804 const struct signatured_type
*dup_tu
4805 = (const struct signatured_type
*) *slot
;
4807 dup_offset
= dup_tu
->per_cu
.offset
;
4810 complaint (&symfile_complaints
,
4811 _("debug type entry at offset 0x%x is duplicate to"
4812 " the entry at offset 0x%x, signature %s"),
4813 offset
.sect_off
, dup_offset
.sect_off
,
4814 hex_string (header
.signature
));
4816 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
4818 if (dwarf_read_debug
> 1)
4819 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature %s\n",
4821 hex_string (header
.signature
));
4827 /* Create the hash table of all entries in the .debug_types
4828 (or .debug_types.dwo) section(s).
4829 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
4830 otherwise it is NULL.
4832 The result is a pointer to the hash table or NULL if there are no types.
4834 Note: This function processes DWO files only, not DWP files. */
4837 create_debug_types_hash_table (struct dwo_file
*dwo_file
,
4838 VEC (dwarf2_section_info_def
) *types
,
4842 struct dwarf2_section_info
*section
;
4844 if (VEC_empty (dwarf2_section_info_def
, types
))
4848 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
4850 create_debug_type_hash_table (dwo_file
, section
, types_htab
,
4854 /* Create the hash table of all entries in the .debug_types section,
4855 and initialize all_type_units.
4856 The result is zero if there is an error (e.g. missing .debug_types section),
4857 otherwise non-zero. */
4860 create_all_type_units (struct objfile
*objfile
)
4862 htab_t types_htab
= NULL
;
4863 struct signatured_type
**iter
;
4865 create_debug_type_hash_table (NULL
, &dwarf2_per_objfile
->info
, types_htab
,
4866 rcuh_kind::COMPILE
);
4867 create_debug_types_hash_table (NULL
, dwarf2_per_objfile
->types
, types_htab
);
4868 if (types_htab
== NULL
)
4870 dwarf2_per_objfile
->signatured_types
= NULL
;
4874 dwarf2_per_objfile
->signatured_types
= types_htab
;
4876 dwarf2_per_objfile
->n_type_units
4877 = dwarf2_per_objfile
->n_allocated_type_units
4878 = htab_elements (types_htab
);
4879 dwarf2_per_objfile
->all_type_units
=
4880 XNEWVEC (struct signatured_type
*, dwarf2_per_objfile
->n_type_units
);
4881 iter
= &dwarf2_per_objfile
->all_type_units
[0];
4882 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
4883 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
4884 == dwarf2_per_objfile
->n_type_units
);
4889 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
4890 If SLOT is non-NULL, it is the entry to use in the hash table.
4891 Otherwise we find one. */
4893 static struct signatured_type
*
4894 add_type_unit (ULONGEST sig
, void **slot
)
4896 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4897 int n_type_units
= dwarf2_per_objfile
->n_type_units
;
4898 struct signatured_type
*sig_type
;
4900 gdb_assert (n_type_units
<= dwarf2_per_objfile
->n_allocated_type_units
);
4902 if (n_type_units
> dwarf2_per_objfile
->n_allocated_type_units
)
4904 if (dwarf2_per_objfile
->n_allocated_type_units
== 0)
4905 dwarf2_per_objfile
->n_allocated_type_units
= 1;
4906 dwarf2_per_objfile
->n_allocated_type_units
*= 2;
4907 dwarf2_per_objfile
->all_type_units
4908 = XRESIZEVEC (struct signatured_type
*,
4909 dwarf2_per_objfile
->all_type_units
,
4910 dwarf2_per_objfile
->n_allocated_type_units
);
4911 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
4913 dwarf2_per_objfile
->n_type_units
= n_type_units
;
4915 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4916 struct signatured_type
);
4917 dwarf2_per_objfile
->all_type_units
[n_type_units
- 1] = sig_type
;
4918 sig_type
->signature
= sig
;
4919 sig_type
->per_cu
.is_debug_types
= 1;
4920 if (dwarf2_per_objfile
->using_index
)
4922 sig_type
->per_cu
.v
.quick
=
4923 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4924 struct dwarf2_per_cu_quick_data
);
4929 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4932 gdb_assert (*slot
== NULL
);
4934 /* The rest of sig_type must be filled in by the caller. */
4938 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
4939 Fill in SIG_ENTRY with DWO_ENTRY. */
4942 fill_in_sig_entry_from_dwo_entry (struct objfile
*objfile
,
4943 struct signatured_type
*sig_entry
,
4944 struct dwo_unit
*dwo_entry
)
4946 /* Make sure we're not clobbering something we don't expect to. */
4947 gdb_assert (! sig_entry
->per_cu
.queued
);
4948 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
4949 if (dwarf2_per_objfile
->using_index
)
4951 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
4952 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
4955 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
4956 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
4957 gdb_assert (sig_entry
->type_offset_in_section
.sect_off
== 0);
4958 gdb_assert (sig_entry
->type_unit_group
== NULL
);
4959 gdb_assert (sig_entry
->dwo_unit
== NULL
);
4961 sig_entry
->per_cu
.section
= dwo_entry
->section
;
4962 sig_entry
->per_cu
.offset
= dwo_entry
->offset
;
4963 sig_entry
->per_cu
.length
= dwo_entry
->length
;
4964 sig_entry
->per_cu
.reading_dwo_directly
= 1;
4965 sig_entry
->per_cu
.objfile
= objfile
;
4966 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
4967 sig_entry
->dwo_unit
= dwo_entry
;
4970 /* Subroutine of lookup_signatured_type.
4971 If we haven't read the TU yet, create the signatured_type data structure
4972 for a TU to be read in directly from a DWO file, bypassing the stub.
4973 This is the "Stay in DWO Optimization": When there is no DWP file and we're
4974 using .gdb_index, then when reading a CU we want to stay in the DWO file
4975 containing that CU. Otherwise we could end up reading several other DWO
4976 files (due to comdat folding) to process the transitive closure of all the
4977 mentioned TUs, and that can be slow. The current DWO file will have every
4978 type signature that it needs.
4979 We only do this for .gdb_index because in the psymtab case we already have
4980 to read all the DWOs to build the type unit groups. */
4982 static struct signatured_type
*
4983 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4985 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4986 struct dwo_file
*dwo_file
;
4987 struct dwo_unit find_dwo_entry
, *dwo_entry
;
4988 struct signatured_type find_sig_entry
, *sig_entry
;
4991 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
4993 /* If TU skeletons have been removed then we may not have read in any
4995 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4997 dwarf2_per_objfile
->signatured_types
4998 = allocate_signatured_type_table (objfile
);
5001 /* We only ever need to read in one copy of a signatured type.
5002 Use the global signatured_types array to do our own comdat-folding
5003 of types. If this is the first time we're reading this TU, and
5004 the TU has an entry in .gdb_index, replace the recorded data from
5005 .gdb_index with this TU. */
5007 find_sig_entry
.signature
= sig
;
5008 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
5009 &find_sig_entry
, INSERT
);
5010 sig_entry
= (struct signatured_type
*) *slot
;
5012 /* We can get here with the TU already read, *or* in the process of being
5013 read. Don't reassign the global entry to point to this DWO if that's
5014 the case. Also note that if the TU is already being read, it may not
5015 have come from a DWO, the program may be a mix of Fission-compiled
5016 code and non-Fission-compiled code. */
5018 /* Have we already tried to read this TU?
5019 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
5020 needn't exist in the global table yet). */
5021 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
5024 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
5025 dwo_unit of the TU itself. */
5026 dwo_file
= cu
->dwo_unit
->dwo_file
;
5028 /* Ok, this is the first time we're reading this TU. */
5029 if (dwo_file
->tus
== NULL
)
5031 find_dwo_entry
.signature
= sig
;
5032 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_entry
);
5033 if (dwo_entry
== NULL
)
5036 /* If the global table doesn't have an entry for this TU, add one. */
5037 if (sig_entry
== NULL
)
5038 sig_entry
= add_type_unit (sig
, slot
);
5040 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
5041 sig_entry
->per_cu
.tu_read
= 1;
5045 /* Subroutine of lookup_signatured_type.
5046 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
5047 then try the DWP file. If the TU stub (skeleton) has been removed then
5048 it won't be in .gdb_index. */
5050 static struct signatured_type
*
5051 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
5053 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5054 struct dwp_file
*dwp_file
= get_dwp_file ();
5055 struct dwo_unit
*dwo_entry
;
5056 struct signatured_type find_sig_entry
, *sig_entry
;
5059 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
5060 gdb_assert (dwp_file
!= NULL
);
5062 /* If TU skeletons have been removed then we may not have read in any
5064 if (dwarf2_per_objfile
->signatured_types
== NULL
)
5066 dwarf2_per_objfile
->signatured_types
5067 = allocate_signatured_type_table (objfile
);
5070 find_sig_entry
.signature
= sig
;
5071 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
5072 &find_sig_entry
, INSERT
);
5073 sig_entry
= (struct signatured_type
*) *slot
;
5075 /* Have we already tried to read this TU?
5076 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
5077 needn't exist in the global table yet). */
5078 if (sig_entry
!= NULL
)
5081 if (dwp_file
->tus
== NULL
)
5083 dwo_entry
= lookup_dwo_unit_in_dwp (dwp_file
, NULL
,
5084 sig
, 1 /* is_debug_types */);
5085 if (dwo_entry
== NULL
)
5088 sig_entry
= add_type_unit (sig
, slot
);
5089 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
5094 /* Lookup a signature based type for DW_FORM_ref_sig8.
5095 Returns NULL if signature SIG is not present in the table.
5096 It is up to the caller to complain about this. */
5098 static struct signatured_type
*
5099 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
5102 && dwarf2_per_objfile
->using_index
)
5104 /* We're in a DWO/DWP file, and we're using .gdb_index.
5105 These cases require special processing. */
5106 if (get_dwp_file () == NULL
)
5107 return lookup_dwo_signatured_type (cu
, sig
);
5109 return lookup_dwp_signatured_type (cu
, sig
);
5113 struct signatured_type find_entry
, *entry
;
5115 if (dwarf2_per_objfile
->signatured_types
== NULL
)
5117 find_entry
.signature
= sig
;
5118 entry
= ((struct signatured_type
*)
5119 htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
));
5124 /* Low level DIE reading support. */
5126 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
5129 init_cu_die_reader (struct die_reader_specs
*reader
,
5130 struct dwarf2_cu
*cu
,
5131 struct dwarf2_section_info
*section
,
5132 struct dwo_file
*dwo_file
)
5134 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
5135 reader
->abfd
= get_section_bfd_owner (section
);
5137 reader
->dwo_file
= dwo_file
;
5138 reader
->die_section
= section
;
5139 reader
->buffer
= section
->buffer
;
5140 reader
->buffer_end
= section
->buffer
+ section
->size
;
5141 reader
->comp_dir
= NULL
;
5144 /* Subroutine of init_cutu_and_read_dies to simplify it.
5145 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
5146 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
5149 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
5150 from it to the DIE in the DWO. If NULL we are skipping the stub.
5151 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
5152 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
5153 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
5154 STUB_COMP_DIR may be non-NULL.
5155 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
5156 are filled in with the info of the DIE from the DWO file.
5157 ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies
5158 provided an abbrev table to use.
5159 The result is non-zero if a valid (non-dummy) DIE was found. */
5162 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
5163 struct dwo_unit
*dwo_unit
,
5164 int abbrev_table_provided
,
5165 struct die_info
*stub_comp_unit_die
,
5166 const char *stub_comp_dir
,
5167 struct die_reader_specs
*result_reader
,
5168 const gdb_byte
**result_info_ptr
,
5169 struct die_info
**result_comp_unit_die
,
5170 int *result_has_children
)
5172 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5173 struct dwarf2_cu
*cu
= this_cu
->cu
;
5174 struct dwarf2_section_info
*section
;
5176 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5177 ULONGEST signature
; /* Or dwo_id. */
5178 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
5179 int i
,num_extra_attrs
;
5180 struct dwarf2_section_info
*dwo_abbrev_section
;
5181 struct attribute
*attr
;
5182 struct die_info
*comp_unit_die
;
5184 /* At most one of these may be provided. */
5185 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
5187 /* These attributes aren't processed until later:
5188 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
5189 DW_AT_comp_dir is used now, to find the DWO file, but it is also
5190 referenced later. However, these attributes are found in the stub
5191 which we won't have later. In order to not impose this complication
5192 on the rest of the code, we read them here and copy them to the
5201 if (stub_comp_unit_die
!= NULL
)
5203 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
5205 if (! this_cu
->is_debug_types
)
5206 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
5207 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
5208 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
5209 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
5210 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
5212 /* There should be a DW_AT_addr_base attribute here (if needed).
5213 We need the value before we can process DW_FORM_GNU_addr_index. */
5215 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
5217 cu
->addr_base
= DW_UNSND (attr
);
5219 /* There should be a DW_AT_ranges_base attribute here (if needed).
5220 We need the value before we can process DW_AT_ranges. */
5221 cu
->ranges_base
= 0;
5222 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
5224 cu
->ranges_base
= DW_UNSND (attr
);
5226 else if (stub_comp_dir
!= NULL
)
5228 /* Reconstruct the comp_dir attribute to simplify the code below. */
5229 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
5230 comp_dir
->name
= DW_AT_comp_dir
;
5231 comp_dir
->form
= DW_FORM_string
;
5232 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
5233 DW_STRING (comp_dir
) = stub_comp_dir
;
5236 /* Set up for reading the DWO CU/TU. */
5237 cu
->dwo_unit
= dwo_unit
;
5238 section
= dwo_unit
->section
;
5239 dwarf2_read_section (objfile
, section
);
5240 abfd
= get_section_bfd_owner (section
);
5241 begin_info_ptr
= info_ptr
= section
->buffer
+ dwo_unit
->offset
.sect_off
;
5242 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
5243 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
);
5245 if (this_cu
->is_debug_types
)
5247 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
5249 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5251 info_ptr
, rcuh_kind::TYPE
);
5252 /* This is not an assert because it can be caused by bad debug info. */
5253 if (sig_type
->signature
!= cu
->header
.signature
)
5255 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
5256 " TU at offset 0x%x [in module %s]"),
5257 hex_string (sig_type
->signature
),
5258 hex_string (cu
->header
.signature
),
5259 dwo_unit
->offset
.sect_off
,
5260 bfd_get_filename (abfd
));
5262 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5263 /* For DWOs coming from DWP files, we don't know the CU length
5264 nor the type's offset in the TU until now. */
5265 dwo_unit
->length
= get_cu_length (&cu
->header
);
5266 dwo_unit
->type_offset_in_tu
= cu
->header
.type_offset_in_tu
;
5268 /* Establish the type offset that can be used to lookup the type.
5269 For DWO files, we don't know it until now. */
5270 sig_type
->type_offset_in_section
.sect_off
=
5271 dwo_unit
->offset
.sect_off
+ dwo_unit
->type_offset_in_tu
.cu_off
;
5275 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5277 info_ptr
, rcuh_kind::COMPILE
);
5278 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5279 /* For DWOs coming from DWP files, we don't know the CU length
5281 dwo_unit
->length
= get_cu_length (&cu
->header
);
5284 /* Replace the CU's original abbrev table with the DWO's.
5285 Reminder: We can't read the abbrev table until we've read the header. */
5286 if (abbrev_table_provided
)
5288 /* Don't free the provided abbrev table, the caller of
5289 init_cutu_and_read_dies owns it. */
5290 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5291 /* Ensure the DWO abbrev table gets freed. */
5292 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5296 dwarf2_free_abbrev_table (cu
);
5297 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5298 /* Leave any existing abbrev table cleanup as is. */
5301 /* Read in the die, but leave space to copy over the attributes
5302 from the stub. This has the benefit of simplifying the rest of
5303 the code - all the work to maintain the illusion of a single
5304 DW_TAG_{compile,type}_unit DIE is done here. */
5305 num_extra_attrs
= ((stmt_list
!= NULL
)
5309 + (comp_dir
!= NULL
));
5310 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
5311 result_has_children
, num_extra_attrs
);
5313 /* Copy over the attributes from the stub to the DIE we just read in. */
5314 comp_unit_die
= *result_comp_unit_die
;
5315 i
= comp_unit_die
->num_attrs
;
5316 if (stmt_list
!= NULL
)
5317 comp_unit_die
->attrs
[i
++] = *stmt_list
;
5319 comp_unit_die
->attrs
[i
++] = *low_pc
;
5320 if (high_pc
!= NULL
)
5321 comp_unit_die
->attrs
[i
++] = *high_pc
;
5323 comp_unit_die
->attrs
[i
++] = *ranges
;
5324 if (comp_dir
!= NULL
)
5325 comp_unit_die
->attrs
[i
++] = *comp_dir
;
5326 comp_unit_die
->num_attrs
+= num_extra_attrs
;
5328 if (dwarf_die_debug
)
5330 fprintf_unfiltered (gdb_stdlog
,
5331 "Read die from %s@0x%x of %s:\n",
5332 get_section_name (section
),
5333 (unsigned) (begin_info_ptr
- section
->buffer
),
5334 bfd_get_filename (abfd
));
5335 dump_die (comp_unit_die
, dwarf_die_debug
);
5338 /* Save the comp_dir attribute. If there is no DWP file then we'll read
5339 TUs by skipping the stub and going directly to the entry in the DWO file.
5340 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
5341 to get it via circuitous means. Blech. */
5342 if (comp_dir
!= NULL
)
5343 result_reader
->comp_dir
= DW_STRING (comp_dir
);
5345 /* Skip dummy compilation units. */
5346 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
5347 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5350 *result_info_ptr
= info_ptr
;
5354 /* Subroutine of init_cutu_and_read_dies to simplify it.
5355 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
5356 Returns NULL if the specified DWO unit cannot be found. */
5358 static struct dwo_unit
*
5359 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
5360 struct die_info
*comp_unit_die
)
5362 struct dwarf2_cu
*cu
= this_cu
->cu
;
5363 struct attribute
*attr
;
5365 struct dwo_unit
*dwo_unit
;
5366 const char *comp_dir
, *dwo_name
;
5368 gdb_assert (cu
!= NULL
);
5370 /* Yeah, we look dwo_name up again, but it simplifies the code. */
5371 dwo_name
= dwarf2_string_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5372 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
5374 if (this_cu
->is_debug_types
)
5376 struct signatured_type
*sig_type
;
5378 /* Since this_cu is the first member of struct signatured_type,
5379 we can go from a pointer to one to a pointer to the other. */
5380 sig_type
= (struct signatured_type
*) this_cu
;
5381 signature
= sig_type
->signature
;
5382 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
5386 struct attribute
*attr
;
5388 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
5390 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
5392 dwo_name
, objfile_name (this_cu
->objfile
));
5393 signature
= DW_UNSND (attr
);
5394 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
5401 /* Subroutine of init_cutu_and_read_dies to simplify it.
5402 See it for a description of the parameters.
5403 Read a TU directly from a DWO file, bypassing the stub.
5405 Note: This function could be a little bit simpler if we shared cleanups
5406 with our caller, init_cutu_and_read_dies. That's generally a fragile thing
5407 to do, so we keep this function self-contained. Or we could move this
5408 into our caller, but it's complex enough already. */
5411 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
5412 int use_existing_cu
, int keep
,
5413 die_reader_func_ftype
*die_reader_func
,
5416 struct dwarf2_cu
*cu
;
5417 struct signatured_type
*sig_type
;
5418 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5419 struct die_reader_specs reader
;
5420 const gdb_byte
*info_ptr
;
5421 struct die_info
*comp_unit_die
;
5424 /* Verify we can do the following downcast, and that we have the
5426 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
5427 sig_type
= (struct signatured_type
*) this_cu
;
5428 gdb_assert (sig_type
->dwo_unit
!= NULL
);
5430 cleanups
= make_cleanup (null_cleanup
, NULL
);
5432 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5434 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
5436 /* There's no need to do the rereading_dwo_cu handling that
5437 init_cutu_and_read_dies does since we don't read the stub. */
5441 /* If !use_existing_cu, this_cu->cu must be NULL. */
5442 gdb_assert (this_cu
->cu
== NULL
);
5443 cu
= XNEW (struct dwarf2_cu
);
5444 init_one_comp_unit (cu
, this_cu
);
5445 /* If an error occurs while loading, release our storage. */
5446 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5449 /* A future optimization, if needed, would be to use an existing
5450 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
5451 could share abbrev tables. */
5453 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
5454 0 /* abbrev_table_provided */,
5455 NULL
/* stub_comp_unit_die */,
5456 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
5458 &comp_unit_die
, &has_children
) == 0)
5461 do_cleanups (cleanups
);
5465 /* All the "real" work is done here. */
5466 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5468 /* This duplicates the code in init_cutu_and_read_dies,
5469 but the alternative is making the latter more complex.
5470 This function is only for the special case of using DWO files directly:
5471 no point in overly complicating the general case just to handle this. */
5472 if (free_cu_cleanup
!= NULL
)
5476 /* We've successfully allocated this compilation unit. Let our
5477 caller clean it up when finished with it. */
5478 discard_cleanups (free_cu_cleanup
);
5480 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5481 So we have to manually free the abbrev table. */
5482 dwarf2_free_abbrev_table (cu
);
5484 /* Link this CU into read_in_chain. */
5485 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5486 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5489 do_cleanups (free_cu_cleanup
);
5492 do_cleanups (cleanups
);
5495 /* Initialize a CU (or TU) and read its DIEs.
5496 If the CU defers to a DWO file, read the DWO file as well.
5498 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
5499 Otherwise the table specified in the comp unit header is read in and used.
5500 This is an optimization for when we already have the abbrev table.
5502 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
5503 Otherwise, a new CU is allocated with xmalloc.
5505 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
5506 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
5508 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5509 linker) then DIE_READER_FUNC will not get called. */
5512 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
5513 struct abbrev_table
*abbrev_table
,
5514 int use_existing_cu
, int keep
,
5515 die_reader_func_ftype
*die_reader_func
,
5518 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5519 struct dwarf2_section_info
*section
= this_cu
->section
;
5520 bfd
*abfd
= get_section_bfd_owner (section
);
5521 struct dwarf2_cu
*cu
;
5522 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5523 struct die_reader_specs reader
;
5524 struct die_info
*comp_unit_die
;
5526 struct attribute
*attr
;
5527 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5528 struct signatured_type
*sig_type
= NULL
;
5529 struct dwarf2_section_info
*abbrev_section
;
5530 /* Non-zero if CU currently points to a DWO file and we need to
5531 reread it. When this happens we need to reread the skeleton die
5532 before we can reread the DWO file (this only applies to CUs, not TUs). */
5533 int rereading_dwo_cu
= 0;
5535 if (dwarf_die_debug
)
5536 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5537 this_cu
->is_debug_types
? "type" : "comp",
5538 this_cu
->offset
.sect_off
);
5540 if (use_existing_cu
)
5543 /* If we're reading a TU directly from a DWO file, including a virtual DWO
5544 file (instead of going through the stub), short-circuit all of this. */
5545 if (this_cu
->reading_dwo_directly
)
5547 /* Narrow down the scope of possibilities to have to understand. */
5548 gdb_assert (this_cu
->is_debug_types
);
5549 gdb_assert (abbrev_table
== NULL
);
5550 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
, keep
,
5551 die_reader_func
, data
);
5555 cleanups
= make_cleanup (null_cleanup
, NULL
);
5557 /* This is cheap if the section is already read in. */
5558 dwarf2_read_section (objfile
, section
);
5560 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
5562 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
5564 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5567 /* If this CU is from a DWO file we need to start over, we need to
5568 refetch the attributes from the skeleton CU.
5569 This could be optimized by retrieving those attributes from when we
5570 were here the first time: the previous comp_unit_die was stored in
5571 comp_unit_obstack. But there's no data yet that we need this
5573 if (cu
->dwo_unit
!= NULL
)
5574 rereading_dwo_cu
= 1;
5578 /* If !use_existing_cu, this_cu->cu must be NULL. */
5579 gdb_assert (this_cu
->cu
== NULL
);
5580 cu
= XNEW (struct dwarf2_cu
);
5581 init_one_comp_unit (cu
, this_cu
);
5582 /* If an error occurs while loading, release our storage. */
5583 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5586 /* Get the header. */
5587 if (cu
->header
.first_die_offset
.cu_off
!= 0 && ! rereading_dwo_cu
)
5589 /* We already have the header, there's no need to read it in again. */
5590 info_ptr
+= cu
->header
.first_die_offset
.cu_off
;
5594 if (this_cu
->is_debug_types
)
5596 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5597 abbrev_section
, info_ptr
,
5600 /* Since per_cu is the first member of struct signatured_type,
5601 we can go from a pointer to one to a pointer to the other. */
5602 sig_type
= (struct signatured_type
*) this_cu
;
5603 gdb_assert (sig_type
->signature
== cu
->header
.signature
);
5604 gdb_assert (sig_type
->type_offset_in_tu
.cu_off
5605 == cu
->header
.type_offset_in_tu
.cu_off
);
5606 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5608 /* LENGTH has not been set yet for type units if we're
5609 using .gdb_index. */
5610 this_cu
->length
= get_cu_length (&cu
->header
);
5612 /* Establish the type offset that can be used to lookup the type. */
5613 sig_type
->type_offset_in_section
.sect_off
=
5614 this_cu
->offset
.sect_off
+ sig_type
->type_offset_in_tu
.cu_off
;
5616 this_cu
->dwarf_version
= cu
->header
.version
;
5620 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5623 rcuh_kind::COMPILE
);
5625 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5626 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
5627 this_cu
->dwarf_version
= cu
->header
.version
;
5631 /* Skip dummy compilation units. */
5632 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5633 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5635 do_cleanups (cleanups
);
5639 /* If we don't have them yet, read the abbrevs for this compilation unit.
5640 And if we need to read them now, make sure they're freed when we're
5641 done. Note that it's important that if the CU had an abbrev table
5642 on entry we don't free it when we're done: Somewhere up the call stack
5643 it may be in use. */
5644 if (abbrev_table
!= NULL
)
5646 gdb_assert (cu
->abbrev_table
== NULL
);
5647 gdb_assert (cu
->header
.abbrev_offset
.sect_off
5648 == abbrev_table
->offset
.sect_off
);
5649 cu
->abbrev_table
= abbrev_table
;
5651 else if (cu
->abbrev_table
== NULL
)
5653 dwarf2_read_abbrevs (cu
, abbrev_section
);
5654 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5656 else if (rereading_dwo_cu
)
5658 dwarf2_free_abbrev_table (cu
);
5659 dwarf2_read_abbrevs (cu
, abbrev_section
);
5662 /* Read the top level CU/TU die. */
5663 init_cu_die_reader (&reader
, cu
, section
, NULL
);
5664 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5666 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
5668 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
5669 DWO CU, that this test will fail (the attribute will not be present). */
5670 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5673 struct dwo_unit
*dwo_unit
;
5674 struct die_info
*dwo_comp_unit_die
;
5678 complaint (&symfile_complaints
,
5679 _("compilation unit with DW_AT_GNU_dwo_name"
5680 " has children (offset 0x%x) [in module %s]"),
5681 this_cu
->offset
.sect_off
, bfd_get_filename (abfd
));
5683 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
);
5684 if (dwo_unit
!= NULL
)
5686 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
5687 abbrev_table
!= NULL
,
5688 comp_unit_die
, NULL
,
5690 &dwo_comp_unit_die
, &has_children
) == 0)
5693 do_cleanups (cleanups
);
5696 comp_unit_die
= dwo_comp_unit_die
;
5700 /* Yikes, we couldn't find the rest of the DIE, we only have
5701 the stub. A complaint has already been logged. There's
5702 not much more we can do except pass on the stub DIE to
5703 die_reader_func. We don't want to throw an error on bad
5708 /* All of the above is setup for this call. Yikes. */
5709 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5711 /* Done, clean up. */
5712 if (free_cu_cleanup
!= NULL
)
5716 /* We've successfully allocated this compilation unit. Let our
5717 caller clean it up when finished with it. */
5718 discard_cleanups (free_cu_cleanup
);
5720 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5721 So we have to manually free the abbrev table. */
5722 dwarf2_free_abbrev_table (cu
);
5724 /* Link this CU into read_in_chain. */
5725 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5726 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5729 do_cleanups (free_cu_cleanup
);
5732 do_cleanups (cleanups
);
5735 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present.
5736 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed
5737 to have already done the lookup to find the DWO file).
5739 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
5740 THIS_CU->is_debug_types, but nothing else.
5742 We fill in THIS_CU->length.
5744 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5745 linker) then DIE_READER_FUNC will not get called.
5747 THIS_CU->cu is always freed when done.
5748 This is done in order to not leave THIS_CU->cu in a state where we have
5749 to care whether it refers to the "main" CU or the DWO CU. */
5752 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
5753 struct dwo_file
*dwo_file
,
5754 die_reader_func_ftype
*die_reader_func
,
5757 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5758 struct dwarf2_section_info
*section
= this_cu
->section
;
5759 bfd
*abfd
= get_section_bfd_owner (section
);
5760 struct dwarf2_section_info
*abbrev_section
;
5761 struct dwarf2_cu cu
;
5762 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5763 struct die_reader_specs reader
;
5764 struct cleanup
*cleanups
;
5765 struct die_info
*comp_unit_die
;
5768 if (dwarf_die_debug
)
5769 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5770 this_cu
->is_debug_types
? "type" : "comp",
5771 this_cu
->offset
.sect_off
);
5773 gdb_assert (this_cu
->cu
== NULL
);
5775 abbrev_section
= (dwo_file
!= NULL
5776 ? &dwo_file
->sections
.abbrev
5777 : get_abbrev_section_for_cu (this_cu
));
5779 /* This is cheap if the section is already read in. */
5780 dwarf2_read_section (objfile
, section
);
5782 init_one_comp_unit (&cu
, this_cu
);
5784 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
5786 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
5787 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, section
,
5788 abbrev_section
, info_ptr
,
5789 (this_cu
->is_debug_types
5791 : rcuh_kind::COMPILE
));
5793 this_cu
->length
= get_cu_length (&cu
.header
);
5795 /* Skip dummy compilation units. */
5796 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5797 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5799 do_cleanups (cleanups
);
5803 dwarf2_read_abbrevs (&cu
, abbrev_section
);
5804 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
5806 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
);
5807 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5809 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5811 do_cleanups (cleanups
);
5814 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
5815 does not lookup the specified DWO file.
5816 This cannot be used to read DWO files.
5818 THIS_CU->cu is always freed when done.
5819 This is done in order to not leave THIS_CU->cu in a state where we have
5820 to care whether it refers to the "main" CU or the DWO CU.
5821 We can revisit this if the data shows there's a performance issue. */
5824 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
5825 die_reader_func_ftype
*die_reader_func
,
5828 init_cutu_and_read_dies_no_follow (this_cu
, NULL
, die_reader_func
, data
);
5831 /* Type Unit Groups.
5833 Type Unit Groups are a way to collapse the set of all TUs (type units) into
5834 a more manageable set. The grouping is done by DW_AT_stmt_list entry
5835 so that all types coming from the same compilation (.o file) are grouped
5836 together. A future step could be to put the types in the same symtab as
5837 the CU the types ultimately came from. */
5840 hash_type_unit_group (const void *item
)
5842 const struct type_unit_group
*tu_group
5843 = (const struct type_unit_group
*) item
;
5845 return hash_stmt_list_entry (&tu_group
->hash
);
5849 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
5851 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
5852 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
5854 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
5857 /* Allocate a hash table for type unit groups. */
5860 allocate_type_unit_groups_table (void)
5862 return htab_create_alloc_ex (3,
5863 hash_type_unit_group
,
5866 &dwarf2_per_objfile
->objfile
->objfile_obstack
,
5867 hashtab_obstack_allocate
,
5868 dummy_obstack_deallocate
);
5871 /* Type units that don't have DW_AT_stmt_list are grouped into their own
5872 partial symtabs. We combine several TUs per psymtab to not let the size
5873 of any one psymtab grow too big. */
5874 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
5875 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
5877 /* Helper routine for get_type_unit_group.
5878 Create the type_unit_group object used to hold one or more TUs. */
5880 static struct type_unit_group
*
5881 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
5883 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5884 struct dwarf2_per_cu_data
*per_cu
;
5885 struct type_unit_group
*tu_group
;
5887 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5888 struct type_unit_group
);
5889 per_cu
= &tu_group
->per_cu
;
5890 per_cu
->objfile
= objfile
;
5892 if (dwarf2_per_objfile
->using_index
)
5894 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5895 struct dwarf2_per_cu_quick_data
);
5899 unsigned int line_offset
= line_offset_struct
.sect_off
;
5900 struct partial_symtab
*pst
;
5903 /* Give the symtab a useful name for debug purposes. */
5904 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
5905 name
= xstrprintf ("<type_units_%d>",
5906 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
5908 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
5910 pst
= create_partial_symtab (per_cu
, name
);
5916 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
5917 tu_group
->hash
.line_offset
= line_offset_struct
;
5922 /* Look up the type_unit_group for type unit CU, and create it if necessary.
5923 STMT_LIST is a DW_AT_stmt_list attribute. */
5925 static struct type_unit_group
*
5926 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
5928 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
5929 struct type_unit_group
*tu_group
;
5931 unsigned int line_offset
;
5932 struct type_unit_group type_unit_group_for_lookup
;
5934 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
5936 dwarf2_per_objfile
->type_unit_groups
=
5937 allocate_type_unit_groups_table ();
5940 /* Do we need to create a new group, or can we use an existing one? */
5944 line_offset
= DW_UNSND (stmt_list
);
5945 ++tu_stats
->nr_symtab_sharers
;
5949 /* Ugh, no stmt_list. Rare, but we have to handle it.
5950 We can do various things here like create one group per TU or
5951 spread them over multiple groups to split up the expansion work.
5952 To avoid worst case scenarios (too many groups or too large groups)
5953 we, umm, group them in bunches. */
5954 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
5955 | (tu_stats
->nr_stmt_less_type_units
5956 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
5957 ++tu_stats
->nr_stmt_less_type_units
;
5960 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
5961 type_unit_group_for_lookup
.hash
.line_offset
.sect_off
= line_offset
;
5962 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
5963 &type_unit_group_for_lookup
, INSERT
);
5966 tu_group
= (struct type_unit_group
*) *slot
;
5967 gdb_assert (tu_group
!= NULL
);
5971 sect_offset line_offset_struct
;
5973 line_offset_struct
.sect_off
= line_offset
;
5974 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
5976 ++tu_stats
->nr_symtabs
;
5982 /* Partial symbol tables. */
5984 /* Create a psymtab named NAME and assign it to PER_CU.
5986 The caller must fill in the following details:
5987 dirname, textlow, texthigh. */
5989 static struct partial_symtab
*
5990 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
5992 struct objfile
*objfile
= per_cu
->objfile
;
5993 struct partial_symtab
*pst
;
5995 pst
= start_psymtab_common (objfile
, name
, 0,
5996 objfile
->global_psymbols
.next
,
5997 objfile
->static_psymbols
.next
);
5999 pst
->psymtabs_addrmap_supported
= 1;
6001 /* This is the glue that links PST into GDB's symbol API. */
6002 pst
->read_symtab_private
= per_cu
;
6003 pst
->read_symtab
= dwarf2_read_symtab
;
6004 per_cu
->v
.psymtab
= pst
;
6009 /* The DATA object passed to process_psymtab_comp_unit_reader has this
6012 struct process_psymtab_comp_unit_data
6014 /* True if we are reading a DW_TAG_partial_unit. */
6016 int want_partial_unit
;
6018 /* The "pretend" language that is used if the CU doesn't declare a
6021 enum language pretend_language
;
6024 /* die_reader_func for process_psymtab_comp_unit. */
6027 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
6028 const gdb_byte
*info_ptr
,
6029 struct die_info
*comp_unit_die
,
6033 struct dwarf2_cu
*cu
= reader
->cu
;
6034 struct objfile
*objfile
= cu
->objfile
;
6035 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6036 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
6038 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
6039 struct partial_symtab
*pst
;
6040 enum pc_bounds_kind cu_bounds_kind
;
6041 const char *filename
;
6042 struct process_psymtab_comp_unit_data
*info
6043 = (struct process_psymtab_comp_unit_data
*) data
;
6045 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !info
->want_partial_unit
)
6048 gdb_assert (! per_cu
->is_debug_types
);
6050 prepare_one_comp_unit (cu
, comp_unit_die
, info
->pretend_language
);
6052 cu
->list_in_scope
= &file_symbols
;
6054 /* Allocate a new partial symbol table structure. */
6055 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
6056 if (filename
== NULL
)
6059 pst
= create_partial_symtab (per_cu
, filename
);
6061 /* This must be done before calling dwarf2_build_include_psymtabs. */
6062 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
6064 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6066 dwarf2_find_base_address (comp_unit_die
, cu
);
6068 /* Possibly set the default values of LOWPC and HIGHPC from
6070 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
6071 &best_highpc
, cu
, pst
);
6072 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
6073 /* Store the contiguous range if it is not empty; it can be empty for
6074 CUs with no code. */
6075 addrmap_set_empty (objfile
->psymtabs_addrmap
,
6076 gdbarch_adjust_dwarf2_addr (gdbarch
,
6077 best_lowpc
+ baseaddr
),
6078 gdbarch_adjust_dwarf2_addr (gdbarch
,
6079 best_highpc
+ baseaddr
) - 1,
6082 /* Check if comp unit has_children.
6083 If so, read the rest of the partial symbols from this comp unit.
6084 If not, there's no more debug_info for this comp unit. */
6087 struct partial_die_info
*first_die
;
6088 CORE_ADDR lowpc
, highpc
;
6090 lowpc
= ((CORE_ADDR
) -1);
6091 highpc
= ((CORE_ADDR
) 0);
6093 first_die
= load_partial_dies (reader
, info_ptr
, 1);
6095 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
6096 cu_bounds_kind
<= PC_BOUNDS_INVALID
, cu
);
6098 /* If we didn't find a lowpc, set it to highpc to avoid
6099 complaints from `maint check'. */
6100 if (lowpc
== ((CORE_ADDR
) -1))
6103 /* If the compilation unit didn't have an explicit address range,
6104 then use the information extracted from its child dies. */
6105 if (cu_bounds_kind
<= PC_BOUNDS_INVALID
)
6108 best_highpc
= highpc
;
6111 pst
->textlow
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
);
6112 pst
->texthigh
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
);
6114 end_psymtab_common (objfile
, pst
);
6116 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
6119 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
6120 struct dwarf2_per_cu_data
*iter
;
6122 /* Fill in 'dependencies' here; we fill in 'users' in a
6124 pst
->number_of_dependencies
= len
;
6126 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
6128 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
6131 pst
->dependencies
[i
] = iter
->v
.psymtab
;
6133 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
6136 /* Get the list of files included in the current compilation unit,
6137 and build a psymtab for each of them. */
6138 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
6140 if (dwarf_read_debug
)
6142 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6144 fprintf_unfiltered (gdb_stdlog
,
6145 "Psymtab for %s unit @0x%x: %s - %s"
6146 ", %d global, %d static syms\n",
6147 per_cu
->is_debug_types
? "type" : "comp",
6148 per_cu
->offset
.sect_off
,
6149 paddress (gdbarch
, pst
->textlow
),
6150 paddress (gdbarch
, pst
->texthigh
),
6151 pst
->n_global_syms
, pst
->n_static_syms
);
6155 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6156 Process compilation unit THIS_CU for a psymtab. */
6159 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
6160 int want_partial_unit
,
6161 enum language pretend_language
)
6163 struct process_psymtab_comp_unit_data info
;
6165 /* If this compilation unit was already read in, free the
6166 cached copy in order to read it in again. This is
6167 necessary because we skipped some symbols when we first
6168 read in the compilation unit (see load_partial_dies).
6169 This problem could be avoided, but the benefit is unclear. */
6170 if (this_cu
->cu
!= NULL
)
6171 free_one_cached_comp_unit (this_cu
);
6173 gdb_assert (! this_cu
->is_debug_types
);
6174 info
.want_partial_unit
= want_partial_unit
;
6175 info
.pretend_language
= pretend_language
;
6176 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0,
6177 process_psymtab_comp_unit_reader
,
6180 /* Age out any secondary CUs. */
6181 age_cached_comp_units ();
6184 /* Reader function for build_type_psymtabs. */
6187 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
6188 const gdb_byte
*info_ptr
,
6189 struct die_info
*type_unit_die
,
6193 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6194 struct dwarf2_cu
*cu
= reader
->cu
;
6195 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
6196 struct signatured_type
*sig_type
;
6197 struct type_unit_group
*tu_group
;
6198 struct attribute
*attr
;
6199 struct partial_die_info
*first_die
;
6200 CORE_ADDR lowpc
, highpc
;
6201 struct partial_symtab
*pst
;
6203 gdb_assert (data
== NULL
);
6204 gdb_assert (per_cu
->is_debug_types
);
6205 sig_type
= (struct signatured_type
*) per_cu
;
6210 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
6211 tu_group
= get_type_unit_group (cu
, attr
);
6213 VEC_safe_push (sig_type_ptr
, tu_group
->tus
, sig_type
);
6215 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
6216 cu
->list_in_scope
= &file_symbols
;
6217 pst
= create_partial_symtab (per_cu
, "");
6220 first_die
= load_partial_dies (reader
, info_ptr
, 1);
6222 lowpc
= (CORE_ADDR
) -1;
6223 highpc
= (CORE_ADDR
) 0;
6224 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
6226 end_psymtab_common (objfile
, pst
);
6229 /* Struct used to sort TUs by their abbreviation table offset. */
6231 struct tu_abbrev_offset
6233 struct signatured_type
*sig_type
;
6234 sect_offset abbrev_offset
;
6237 /* Helper routine for build_type_psymtabs_1, passed to qsort. */
6240 sort_tu_by_abbrev_offset (const void *ap
, const void *bp
)
6242 const struct tu_abbrev_offset
* const *a
6243 = (const struct tu_abbrev_offset
* const*) ap
;
6244 const struct tu_abbrev_offset
* const *b
6245 = (const struct tu_abbrev_offset
* const*) bp
;
6246 unsigned int aoff
= (*a
)->abbrev_offset
.sect_off
;
6247 unsigned int boff
= (*b
)->abbrev_offset
.sect_off
;
6249 return (aoff
> boff
) - (aoff
< boff
);
6252 /* Efficiently read all the type units.
6253 This does the bulk of the work for build_type_psymtabs.
6255 The efficiency is because we sort TUs by the abbrev table they use and
6256 only read each abbrev table once. In one program there are 200K TUs
6257 sharing 8K abbrev tables.
6259 The main purpose of this function is to support building the
6260 dwarf2_per_objfile->type_unit_groups table.
6261 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
6262 can collapse the search space by grouping them by stmt_list.
6263 The savings can be significant, in the same program from above the 200K TUs
6264 share 8K stmt_list tables.
6266 FUNC is expected to call get_type_unit_group, which will create the
6267 struct type_unit_group if necessary and add it to
6268 dwarf2_per_objfile->type_unit_groups. */
6271 build_type_psymtabs_1 (void)
6273 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6274 struct cleanup
*cleanups
;
6275 struct abbrev_table
*abbrev_table
;
6276 sect_offset abbrev_offset
;
6277 struct tu_abbrev_offset
*sorted_by_abbrev
;
6280 /* It's up to the caller to not call us multiple times. */
6281 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
6283 if (dwarf2_per_objfile
->n_type_units
== 0)
6286 /* TUs typically share abbrev tables, and there can be way more TUs than
6287 abbrev tables. Sort by abbrev table to reduce the number of times we
6288 read each abbrev table in.
6289 Alternatives are to punt or to maintain a cache of abbrev tables.
6290 This is simpler and efficient enough for now.
6292 Later we group TUs by their DW_AT_stmt_list value (as this defines the
6293 symtab to use). Typically TUs with the same abbrev offset have the same
6294 stmt_list value too so in practice this should work well.
6296 The basic algorithm here is:
6298 sort TUs by abbrev table
6299 for each TU with same abbrev table:
6300 read abbrev table if first user
6301 read TU top level DIE
6302 [IWBN if DWO skeletons had DW_AT_stmt_list]
6305 if (dwarf_read_debug
)
6306 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
6308 /* Sort in a separate table to maintain the order of all_type_units
6309 for .gdb_index: TU indices directly index all_type_units. */
6310 sorted_by_abbrev
= XNEWVEC (struct tu_abbrev_offset
,
6311 dwarf2_per_objfile
->n_type_units
);
6312 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6314 struct signatured_type
*sig_type
= dwarf2_per_objfile
->all_type_units
[i
];
6316 sorted_by_abbrev
[i
].sig_type
= sig_type
;
6317 sorted_by_abbrev
[i
].abbrev_offset
=
6318 read_abbrev_offset (sig_type
->per_cu
.section
,
6319 sig_type
->per_cu
.offset
);
6321 cleanups
= make_cleanup (xfree
, sorted_by_abbrev
);
6322 qsort (sorted_by_abbrev
, dwarf2_per_objfile
->n_type_units
,
6323 sizeof (struct tu_abbrev_offset
), sort_tu_by_abbrev_offset
);
6325 abbrev_offset
.sect_off
= ~(unsigned) 0;
6326 abbrev_table
= NULL
;
6327 make_cleanup (abbrev_table_free_cleanup
, &abbrev_table
);
6329 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6331 const struct tu_abbrev_offset
*tu
= &sorted_by_abbrev
[i
];
6333 /* Switch to the next abbrev table if necessary. */
6334 if (abbrev_table
== NULL
6335 || tu
->abbrev_offset
.sect_off
!= abbrev_offset
.sect_off
)
6337 if (abbrev_table
!= NULL
)
6339 abbrev_table_free (abbrev_table
);
6340 /* Reset to NULL in case abbrev_table_read_table throws
6341 an error: abbrev_table_free_cleanup will get called. */
6342 abbrev_table
= NULL
;
6344 abbrev_offset
= tu
->abbrev_offset
;
6346 abbrev_table_read_table (&dwarf2_per_objfile
->abbrev
,
6348 ++tu_stats
->nr_uniq_abbrev_tables
;
6351 init_cutu_and_read_dies (&tu
->sig_type
->per_cu
, abbrev_table
, 0, 0,
6352 build_type_psymtabs_reader
, NULL
);
6355 do_cleanups (cleanups
);
6358 /* Print collected type unit statistics. */
6361 print_tu_stats (void)
6363 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6365 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
6366 fprintf_unfiltered (gdb_stdlog
, " %d TUs\n",
6367 dwarf2_per_objfile
->n_type_units
);
6368 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
6369 tu_stats
->nr_uniq_abbrev_tables
);
6370 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
6371 tu_stats
->nr_symtabs
);
6372 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
6373 tu_stats
->nr_symtab_sharers
);
6374 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
6375 tu_stats
->nr_stmt_less_type_units
);
6376 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
6377 tu_stats
->nr_all_type_units_reallocs
);
6380 /* Traversal function for build_type_psymtabs. */
6383 build_type_psymtab_dependencies (void **slot
, void *info
)
6385 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6386 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
6387 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
6388 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6389 int len
= VEC_length (sig_type_ptr
, tu_group
->tus
);
6390 struct signatured_type
*iter
;
6393 gdb_assert (len
> 0);
6394 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
6396 pst
->number_of_dependencies
= len
;
6398 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
6400 VEC_iterate (sig_type_ptr
, tu_group
->tus
, i
, iter
);
6403 gdb_assert (iter
->per_cu
.is_debug_types
);
6404 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
6405 iter
->type_unit_group
= tu_group
;
6408 VEC_free (sig_type_ptr
, tu_group
->tus
);
6413 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6414 Build partial symbol tables for the .debug_types comp-units. */
6417 build_type_psymtabs (struct objfile
*objfile
)
6419 if (! create_all_type_units (objfile
))
6422 build_type_psymtabs_1 ();
6425 /* Traversal function for process_skeletonless_type_unit.
6426 Read a TU in a DWO file and build partial symbols for it. */
6429 process_skeletonless_type_unit (void **slot
, void *info
)
6431 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
6432 struct objfile
*objfile
= (struct objfile
*) info
;
6433 struct signatured_type find_entry
, *entry
;
6435 /* If this TU doesn't exist in the global table, add it and read it in. */
6437 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6439 dwarf2_per_objfile
->signatured_types
6440 = allocate_signatured_type_table (objfile
);
6443 find_entry
.signature
= dwo_unit
->signature
;
6444 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
, &find_entry
,
6446 /* If we've already seen this type there's nothing to do. What's happening
6447 is we're doing our own version of comdat-folding here. */
6451 /* This does the job that create_all_type_units would have done for
6453 entry
= add_type_unit (dwo_unit
->signature
, slot
);
6454 fill_in_sig_entry_from_dwo_entry (objfile
, entry
, dwo_unit
);
6457 /* This does the job that build_type_psymtabs_1 would have done. */
6458 init_cutu_and_read_dies (&entry
->per_cu
, NULL
, 0, 0,
6459 build_type_psymtabs_reader
, NULL
);
6464 /* Traversal function for process_skeletonless_type_units. */
6467 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
6469 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
6471 if (dwo_file
->tus
!= NULL
)
6473 htab_traverse_noresize (dwo_file
->tus
,
6474 process_skeletonless_type_unit
, info
);
6480 /* Scan all TUs of DWO files, verifying we've processed them.
6481 This is needed in case a TU was emitted without its skeleton.
6482 Note: This can't be done until we know what all the DWO files are. */
6485 process_skeletonless_type_units (struct objfile
*objfile
)
6487 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
6488 if (get_dwp_file () == NULL
6489 && dwarf2_per_objfile
->dwo_files
!= NULL
)
6491 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
,
6492 process_dwo_file_for_skeletonless_type_units
,
6497 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
6500 psymtabs_addrmap_cleanup (void *o
)
6502 struct objfile
*objfile
= (struct objfile
*) o
;
6504 objfile
->psymtabs_addrmap
= NULL
;
6507 /* Compute the 'user' field for each psymtab in OBJFILE. */
6510 set_partial_user (struct objfile
*objfile
)
6514 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6516 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6517 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6523 for (j
= 0; j
< pst
->number_of_dependencies
; ++j
)
6525 /* Set the 'user' field only if it is not already set. */
6526 if (pst
->dependencies
[j
]->user
== NULL
)
6527 pst
->dependencies
[j
]->user
= pst
;
6532 /* Build the partial symbol table by doing a quick pass through the
6533 .debug_info and .debug_abbrev sections. */
6536 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
6538 struct cleanup
*back_to
, *addrmap_cleanup
;
6539 struct obstack temp_obstack
;
6542 if (dwarf_read_debug
)
6544 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
6545 objfile_name (objfile
));
6548 dwarf2_per_objfile
->reading_partial_symbols
= 1;
6550 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
6552 /* Any cached compilation units will be linked by the per-objfile
6553 read_in_chain. Make sure to free them when we're done. */
6554 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
6556 build_type_psymtabs (objfile
);
6558 create_all_comp_units (objfile
);
6560 /* Create a temporary address map on a temporary obstack. We later
6561 copy this to the final obstack. */
6562 obstack_init (&temp_obstack
);
6563 make_cleanup_obstack_free (&temp_obstack
);
6564 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
6565 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
6567 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6569 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6571 process_psymtab_comp_unit (per_cu
, 0, language_minimal
);
6574 /* This has to wait until we read the CUs, we need the list of DWOs. */
6575 process_skeletonless_type_units (objfile
);
6577 /* Now that all TUs have been processed we can fill in the dependencies. */
6578 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
6580 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
6581 build_type_psymtab_dependencies
, NULL
);
6584 if (dwarf_read_debug
)
6587 set_partial_user (objfile
);
6589 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
6590 &objfile
->objfile_obstack
);
6591 discard_cleanups (addrmap_cleanup
);
6593 do_cleanups (back_to
);
6595 if (dwarf_read_debug
)
6596 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
6597 objfile_name (objfile
));
6600 /* die_reader_func for load_partial_comp_unit. */
6603 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
6604 const gdb_byte
*info_ptr
,
6605 struct die_info
*comp_unit_die
,
6609 struct dwarf2_cu
*cu
= reader
->cu
;
6611 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
6613 /* Check if comp unit has_children.
6614 If so, read the rest of the partial symbols from this comp unit.
6615 If not, there's no more debug_info for this comp unit. */
6617 load_partial_dies (reader
, info_ptr
, 0);
6620 /* Load the partial DIEs for a secondary CU into memory.
6621 This is also used when rereading a primary CU with load_all_dies. */
6624 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
6626 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
6627 load_partial_comp_unit_reader
, NULL
);
6631 read_comp_units_from_section (struct objfile
*objfile
,
6632 struct dwarf2_section_info
*section
,
6633 unsigned int is_dwz
,
6636 struct dwarf2_per_cu_data
***all_comp_units
)
6638 const gdb_byte
*info_ptr
;
6639 bfd
*abfd
= get_section_bfd_owner (section
);
6641 if (dwarf_read_debug
)
6642 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
6643 get_section_name (section
),
6644 get_section_file_name (section
));
6646 dwarf2_read_section (objfile
, section
);
6648 info_ptr
= section
->buffer
;
6650 while (info_ptr
< section
->buffer
+ section
->size
)
6652 unsigned int length
, initial_length_size
;
6653 struct dwarf2_per_cu_data
*this_cu
;
6656 offset
.sect_off
= info_ptr
- section
->buffer
;
6658 /* Read just enough information to find out where the next
6659 compilation unit is. */
6660 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6662 /* Save the compilation unit for later lookup. */
6663 this_cu
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_per_cu_data
);
6664 memset (this_cu
, 0, sizeof (*this_cu
));
6665 this_cu
->offset
= offset
;
6666 this_cu
->length
= length
+ initial_length_size
;
6667 this_cu
->is_dwz
= is_dwz
;
6668 this_cu
->objfile
= objfile
;
6669 this_cu
->section
= section
;
6671 if (*n_comp_units
== *n_allocated
)
6674 *all_comp_units
= XRESIZEVEC (struct dwarf2_per_cu_data
*,
6675 *all_comp_units
, *n_allocated
);
6677 (*all_comp_units
)[*n_comp_units
] = this_cu
;
6680 info_ptr
= info_ptr
+ this_cu
->length
;
6684 /* Create a list of all compilation units in OBJFILE.
6685 This is only done for -readnow and building partial symtabs. */
6688 create_all_comp_units (struct objfile
*objfile
)
6692 struct dwarf2_per_cu_data
**all_comp_units
;
6693 struct dwz_file
*dwz
;
6697 all_comp_units
= XNEWVEC (struct dwarf2_per_cu_data
*, n_allocated
);
6699 read_comp_units_from_section (objfile
, &dwarf2_per_objfile
->info
, 0,
6700 &n_allocated
, &n_comp_units
, &all_comp_units
);
6702 dwz
= dwarf2_get_dwz_file ();
6704 read_comp_units_from_section (objfile
, &dwz
->info
, 1,
6705 &n_allocated
, &n_comp_units
,
6708 dwarf2_per_objfile
->all_comp_units
= XOBNEWVEC (&objfile
->objfile_obstack
,
6709 struct dwarf2_per_cu_data
*,
6711 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
6712 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
6713 xfree (all_comp_units
);
6714 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
6717 /* Process all loaded DIEs for compilation unit CU, starting at
6718 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
6719 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
6720 DW_AT_ranges). See the comments of add_partial_subprogram on how
6721 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
6724 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
6725 CORE_ADDR
*highpc
, int set_addrmap
,
6726 struct dwarf2_cu
*cu
)
6728 struct partial_die_info
*pdi
;
6730 /* Now, march along the PDI's, descending into ones which have
6731 interesting children but skipping the children of the other ones,
6732 until we reach the end of the compilation unit. */
6738 fixup_partial_die (pdi
, cu
);
6740 /* Anonymous namespaces or modules have no name but have interesting
6741 children, so we need to look at them. Ditto for anonymous
6744 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
6745 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
6746 || pdi
->tag
== DW_TAG_imported_unit
)
6750 case DW_TAG_subprogram
:
6751 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6753 case DW_TAG_constant
:
6754 case DW_TAG_variable
:
6755 case DW_TAG_typedef
:
6756 case DW_TAG_union_type
:
6757 if (!pdi
->is_declaration
)
6759 add_partial_symbol (pdi
, cu
);
6762 case DW_TAG_class_type
:
6763 case DW_TAG_interface_type
:
6764 case DW_TAG_structure_type
:
6765 if (!pdi
->is_declaration
)
6767 add_partial_symbol (pdi
, cu
);
6769 if (cu
->language
== language_rust
&& pdi
->has_children
)
6770 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
6773 case DW_TAG_enumeration_type
:
6774 if (!pdi
->is_declaration
)
6775 add_partial_enumeration (pdi
, cu
);
6777 case DW_TAG_base_type
:
6778 case DW_TAG_subrange_type
:
6779 /* File scope base type definitions are added to the partial
6781 add_partial_symbol (pdi
, cu
);
6783 case DW_TAG_namespace
:
6784 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6787 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6789 case DW_TAG_imported_unit
:
6791 struct dwarf2_per_cu_data
*per_cu
;
6793 /* For now we don't handle imported units in type units. */
6794 if (cu
->per_cu
->is_debug_types
)
6796 error (_("Dwarf Error: DW_TAG_imported_unit is not"
6797 " supported in type units [in module %s]"),
6798 objfile_name (cu
->objfile
));
6801 per_cu
= dwarf2_find_containing_comp_unit (pdi
->d
.offset
,
6805 /* Go read the partial unit, if needed. */
6806 if (per_cu
->v
.psymtab
== NULL
)
6807 process_psymtab_comp_unit (per_cu
, 1, cu
->language
);
6809 VEC_safe_push (dwarf2_per_cu_ptr
,
6810 cu
->per_cu
->imported_symtabs
, per_cu
);
6813 case DW_TAG_imported_declaration
:
6814 add_partial_symbol (pdi
, cu
);
6821 /* If the die has a sibling, skip to the sibling. */
6823 pdi
= pdi
->die_sibling
;
6827 /* Functions used to compute the fully scoped name of a partial DIE.
6829 Normally, this is simple. For C++, the parent DIE's fully scoped
6830 name is concatenated with "::" and the partial DIE's name.
6831 Enumerators are an exception; they use the scope of their parent
6832 enumeration type, i.e. the name of the enumeration type is not
6833 prepended to the enumerator.
6835 There are two complexities. One is DW_AT_specification; in this
6836 case "parent" means the parent of the target of the specification,
6837 instead of the direct parent of the DIE. The other is compilers
6838 which do not emit DW_TAG_namespace; in this case we try to guess
6839 the fully qualified name of structure types from their members'
6840 linkage names. This must be done using the DIE's children rather
6841 than the children of any DW_AT_specification target. We only need
6842 to do this for structures at the top level, i.e. if the target of
6843 any DW_AT_specification (if any; otherwise the DIE itself) does not
6846 /* Compute the scope prefix associated with PDI's parent, in
6847 compilation unit CU. The result will be allocated on CU's
6848 comp_unit_obstack, or a copy of the already allocated PDI->NAME
6849 field. NULL is returned if no prefix is necessary. */
6851 partial_die_parent_scope (struct partial_die_info
*pdi
,
6852 struct dwarf2_cu
*cu
)
6854 const char *grandparent_scope
;
6855 struct partial_die_info
*parent
, *real_pdi
;
6857 /* We need to look at our parent DIE; if we have a DW_AT_specification,
6858 then this means the parent of the specification DIE. */
6861 while (real_pdi
->has_specification
)
6862 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
6863 real_pdi
->spec_is_dwz
, cu
);
6865 parent
= real_pdi
->die_parent
;
6869 if (parent
->scope_set
)
6870 return parent
->scope
;
6872 fixup_partial_die (parent
, cu
);
6874 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
6876 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
6877 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
6878 Work around this problem here. */
6879 if (cu
->language
== language_cplus
6880 && parent
->tag
== DW_TAG_namespace
6881 && strcmp (parent
->name
, "::") == 0
6882 && grandparent_scope
== NULL
)
6884 parent
->scope
= NULL
;
6885 parent
->scope_set
= 1;
6889 if (pdi
->tag
== DW_TAG_enumerator
)
6890 /* Enumerators should not get the name of the enumeration as a prefix. */
6891 parent
->scope
= grandparent_scope
;
6892 else if (parent
->tag
== DW_TAG_namespace
6893 || parent
->tag
== DW_TAG_module
6894 || parent
->tag
== DW_TAG_structure_type
6895 || parent
->tag
== DW_TAG_class_type
6896 || parent
->tag
== DW_TAG_interface_type
6897 || parent
->tag
== DW_TAG_union_type
6898 || parent
->tag
== DW_TAG_enumeration_type
)
6900 if (grandparent_scope
== NULL
)
6901 parent
->scope
= parent
->name
;
6903 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
6905 parent
->name
, 0, cu
);
6909 /* FIXME drow/2004-04-01: What should we be doing with
6910 function-local names? For partial symbols, we should probably be
6912 complaint (&symfile_complaints
,
6913 _("unhandled containing DIE tag %d for DIE at %d"),
6914 parent
->tag
, pdi
->offset
.sect_off
);
6915 parent
->scope
= grandparent_scope
;
6918 parent
->scope_set
= 1;
6919 return parent
->scope
;
6922 /* Return the fully scoped name associated with PDI, from compilation unit
6923 CU. The result will be allocated with malloc. */
6926 partial_die_full_name (struct partial_die_info
*pdi
,
6927 struct dwarf2_cu
*cu
)
6929 const char *parent_scope
;
6931 /* If this is a template instantiation, we can not work out the
6932 template arguments from partial DIEs. So, unfortunately, we have
6933 to go through the full DIEs. At least any work we do building
6934 types here will be reused if full symbols are loaded later. */
6935 if (pdi
->has_template_arguments
)
6937 fixup_partial_die (pdi
, cu
);
6939 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
6941 struct die_info
*die
;
6942 struct attribute attr
;
6943 struct dwarf2_cu
*ref_cu
= cu
;
6945 /* DW_FORM_ref_addr is using section offset. */
6946 attr
.name
= (enum dwarf_attribute
) 0;
6947 attr
.form
= DW_FORM_ref_addr
;
6948 attr
.u
.unsnd
= pdi
->offset
.sect_off
;
6949 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
6951 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
6955 parent_scope
= partial_die_parent_scope (pdi
, cu
);
6956 if (parent_scope
== NULL
)
6959 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
6963 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
6965 struct objfile
*objfile
= cu
->objfile
;
6966 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6968 const char *actual_name
= NULL
;
6970 char *built_actual_name
;
6972 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6974 built_actual_name
= partial_die_full_name (pdi
, cu
);
6975 if (built_actual_name
!= NULL
)
6976 actual_name
= built_actual_name
;
6978 if (actual_name
== NULL
)
6979 actual_name
= pdi
->name
;
6983 case DW_TAG_subprogram
:
6984 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
);
6985 if (pdi
->is_external
|| cu
->language
== language_ada
)
6987 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
6988 of the global scope. But in Ada, we want to be able to access
6989 nested procedures globally. So all Ada subprograms are stored
6990 in the global scope. */
6991 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6992 built_actual_name
!= NULL
,
6993 VAR_DOMAIN
, LOC_BLOCK
,
6994 &objfile
->global_psymbols
,
6995 addr
, cu
->language
, objfile
);
6999 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7000 built_actual_name
!= NULL
,
7001 VAR_DOMAIN
, LOC_BLOCK
,
7002 &objfile
->static_psymbols
,
7003 addr
, cu
->language
, objfile
);
7006 if (pdi
->main_subprogram
&& actual_name
!= NULL
)
7007 set_objfile_main_name (objfile
, actual_name
, cu
->language
);
7009 case DW_TAG_constant
:
7011 struct psymbol_allocation_list
*list
;
7013 if (pdi
->is_external
)
7014 list
= &objfile
->global_psymbols
;
7016 list
= &objfile
->static_psymbols
;
7017 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7018 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
7019 list
, 0, cu
->language
, objfile
);
7022 case DW_TAG_variable
:
7024 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
7028 && !dwarf2_per_objfile
->has_section_at_zero
)
7030 /* A global or static variable may also have been stripped
7031 out by the linker if unused, in which case its address
7032 will be nullified; do not add such variables into partial
7033 symbol table then. */
7035 else if (pdi
->is_external
)
7038 Don't enter into the minimal symbol tables as there is
7039 a minimal symbol table entry from the ELF symbols already.
7040 Enter into partial symbol table if it has a location
7041 descriptor or a type.
7042 If the location descriptor is missing, new_symbol will create
7043 a LOC_UNRESOLVED symbol, the address of the variable will then
7044 be determined from the minimal symbol table whenever the variable
7046 The address for the partial symbol table entry is not
7047 used by GDB, but it comes in handy for debugging partial symbol
7050 if (pdi
->d
.locdesc
|| pdi
->has_type
)
7051 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7052 built_actual_name
!= NULL
,
7053 VAR_DOMAIN
, LOC_STATIC
,
7054 &objfile
->global_psymbols
,
7056 cu
->language
, objfile
);
7060 int has_loc
= pdi
->d
.locdesc
!= NULL
;
7062 /* Static Variable. Skip symbols whose value we cannot know (those
7063 without location descriptors or constant values). */
7064 if (!has_loc
&& !pdi
->has_const_value
)
7066 xfree (built_actual_name
);
7070 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7071 built_actual_name
!= NULL
,
7072 VAR_DOMAIN
, LOC_STATIC
,
7073 &objfile
->static_psymbols
,
7074 has_loc
? addr
+ baseaddr
: (CORE_ADDR
) 0,
7075 cu
->language
, objfile
);
7078 case DW_TAG_typedef
:
7079 case DW_TAG_base_type
:
7080 case DW_TAG_subrange_type
:
7081 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7082 built_actual_name
!= NULL
,
7083 VAR_DOMAIN
, LOC_TYPEDEF
,
7084 &objfile
->static_psymbols
,
7085 0, cu
->language
, objfile
);
7087 case DW_TAG_imported_declaration
:
7088 case DW_TAG_namespace
:
7089 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7090 built_actual_name
!= NULL
,
7091 VAR_DOMAIN
, LOC_TYPEDEF
,
7092 &objfile
->global_psymbols
,
7093 0, cu
->language
, objfile
);
7096 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7097 built_actual_name
!= NULL
,
7098 MODULE_DOMAIN
, LOC_TYPEDEF
,
7099 &objfile
->global_psymbols
,
7100 0, cu
->language
, objfile
);
7102 case DW_TAG_class_type
:
7103 case DW_TAG_interface_type
:
7104 case DW_TAG_structure_type
:
7105 case DW_TAG_union_type
:
7106 case DW_TAG_enumeration_type
:
7107 /* Skip external references. The DWARF standard says in the section
7108 about "Structure, Union, and Class Type Entries": "An incomplete
7109 structure, union or class type is represented by a structure,
7110 union or class entry that does not have a byte size attribute
7111 and that has a DW_AT_declaration attribute." */
7112 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
7114 xfree (built_actual_name
);
7118 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
7119 static vs. global. */
7120 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7121 built_actual_name
!= NULL
,
7122 STRUCT_DOMAIN
, LOC_TYPEDEF
,
7123 cu
->language
== language_cplus
7124 ? &objfile
->global_psymbols
7125 : &objfile
->static_psymbols
,
7126 0, cu
->language
, objfile
);
7129 case DW_TAG_enumerator
:
7130 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7131 built_actual_name
!= NULL
,
7132 VAR_DOMAIN
, LOC_CONST
,
7133 cu
->language
== language_cplus
7134 ? &objfile
->global_psymbols
7135 : &objfile
->static_psymbols
,
7136 0, cu
->language
, objfile
);
7142 xfree (built_actual_name
);
7145 /* Read a partial die corresponding to a namespace; also, add a symbol
7146 corresponding to that namespace to the symbol table. NAMESPACE is
7147 the name of the enclosing namespace. */
7150 add_partial_namespace (struct partial_die_info
*pdi
,
7151 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7152 int set_addrmap
, struct dwarf2_cu
*cu
)
7154 /* Add a symbol for the namespace. */
7156 add_partial_symbol (pdi
, cu
);
7158 /* Now scan partial symbols in that namespace. */
7160 if (pdi
->has_children
)
7161 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7164 /* Read a partial die corresponding to a Fortran module. */
7167 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
7168 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
7170 /* Add a symbol for the namespace. */
7172 add_partial_symbol (pdi
, cu
);
7174 /* Now scan partial symbols in that module. */
7176 if (pdi
->has_children
)
7177 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7180 /* Read a partial die corresponding to a subprogram and create a partial
7181 symbol for that subprogram. When the CU language allows it, this
7182 routine also defines a partial symbol for each nested subprogram
7183 that this subprogram contains. If SET_ADDRMAP is true, record the
7184 covered ranges in the addrmap. Set *LOWPC and *HIGHPC to the lowest
7185 and highest PC values found in PDI.
7187 PDI may also be a lexical block, in which case we simply search
7188 recursively for subprograms defined inside that lexical block.
7189 Again, this is only performed when the CU language allows this
7190 type of definitions. */
7193 add_partial_subprogram (struct partial_die_info
*pdi
,
7194 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7195 int set_addrmap
, struct dwarf2_cu
*cu
)
7197 if (pdi
->tag
== DW_TAG_subprogram
)
7199 if (pdi
->has_pc_info
)
7201 if (pdi
->lowpc
< *lowpc
)
7202 *lowpc
= pdi
->lowpc
;
7203 if (pdi
->highpc
> *highpc
)
7204 *highpc
= pdi
->highpc
;
7207 struct objfile
*objfile
= cu
->objfile
;
7208 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7213 baseaddr
= ANOFFSET (objfile
->section_offsets
,
7214 SECT_OFF_TEXT (objfile
));
7215 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7216 pdi
->lowpc
+ baseaddr
);
7217 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7218 pdi
->highpc
+ baseaddr
);
7219 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
7220 cu
->per_cu
->v
.psymtab
);
7224 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
7226 if (!pdi
->is_declaration
)
7227 /* Ignore subprogram DIEs that do not have a name, they are
7228 illegal. Do not emit a complaint at this point, we will
7229 do so when we convert this psymtab into a symtab. */
7231 add_partial_symbol (pdi
, cu
);
7235 if (! pdi
->has_children
)
7238 if (cu
->language
== language_ada
)
7240 pdi
= pdi
->die_child
;
7243 fixup_partial_die (pdi
, cu
);
7244 if (pdi
->tag
== DW_TAG_subprogram
7245 || pdi
->tag
== DW_TAG_lexical_block
)
7246 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
7247 pdi
= pdi
->die_sibling
;
7252 /* Read a partial die corresponding to an enumeration type. */
7255 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
7256 struct dwarf2_cu
*cu
)
7258 struct partial_die_info
*pdi
;
7260 if (enum_pdi
->name
!= NULL
)
7261 add_partial_symbol (enum_pdi
, cu
);
7263 pdi
= enum_pdi
->die_child
;
7266 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
7267 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
7269 add_partial_symbol (pdi
, cu
);
7270 pdi
= pdi
->die_sibling
;
7274 /* Return the initial uleb128 in the die at INFO_PTR. */
7277 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
7279 unsigned int bytes_read
;
7281 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7284 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
7285 Return the corresponding abbrev, or NULL if the number is zero (indicating
7286 an empty DIE). In either case *BYTES_READ will be set to the length of
7287 the initial number. */
7289 static struct abbrev_info
*
7290 peek_die_abbrev (const gdb_byte
*info_ptr
, unsigned int *bytes_read
,
7291 struct dwarf2_cu
*cu
)
7293 bfd
*abfd
= cu
->objfile
->obfd
;
7294 unsigned int abbrev_number
;
7295 struct abbrev_info
*abbrev
;
7297 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
7299 if (abbrev_number
== 0)
7302 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
7305 error (_("Dwarf Error: Could not find abbrev number %d in %s"
7306 " at offset 0x%x [in module %s]"),
7307 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
7308 cu
->header
.offset
.sect_off
, bfd_get_filename (abfd
));
7314 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7315 Returns a pointer to the end of a series of DIEs, terminated by an empty
7316 DIE. Any children of the skipped DIEs will also be skipped. */
7318 static const gdb_byte
*
7319 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
7321 struct dwarf2_cu
*cu
= reader
->cu
;
7322 struct abbrev_info
*abbrev
;
7323 unsigned int bytes_read
;
7327 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
7329 return info_ptr
+ bytes_read
;
7331 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
7335 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7336 INFO_PTR should point just after the initial uleb128 of a DIE, and the
7337 abbrev corresponding to that skipped uleb128 should be passed in
7338 ABBREV. Returns a pointer to this DIE's sibling, skipping any
7341 static const gdb_byte
*
7342 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
7343 struct abbrev_info
*abbrev
)
7345 unsigned int bytes_read
;
7346 struct attribute attr
;
7347 bfd
*abfd
= reader
->abfd
;
7348 struct dwarf2_cu
*cu
= reader
->cu
;
7349 const gdb_byte
*buffer
= reader
->buffer
;
7350 const gdb_byte
*buffer_end
= reader
->buffer_end
;
7351 unsigned int form
, i
;
7353 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
7355 /* The only abbrev we care about is DW_AT_sibling. */
7356 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
7358 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
7359 if (attr
.form
== DW_FORM_ref_addr
)
7360 complaint (&symfile_complaints
,
7361 _("ignoring absolute DW_AT_sibling"));
7364 unsigned int off
= dwarf2_get_ref_die_offset (&attr
).sect_off
;
7365 const gdb_byte
*sibling_ptr
= buffer
+ off
;
7367 if (sibling_ptr
< info_ptr
)
7368 complaint (&symfile_complaints
,
7369 _("DW_AT_sibling points backwards"));
7370 else if (sibling_ptr
> reader
->buffer_end
)
7371 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
7377 /* If it isn't DW_AT_sibling, skip this attribute. */
7378 form
= abbrev
->attrs
[i
].form
;
7382 case DW_FORM_ref_addr
:
7383 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
7384 and later it is offset sized. */
7385 if (cu
->header
.version
== 2)
7386 info_ptr
+= cu
->header
.addr_size
;
7388 info_ptr
+= cu
->header
.offset_size
;
7390 case DW_FORM_GNU_ref_alt
:
7391 info_ptr
+= cu
->header
.offset_size
;
7394 info_ptr
+= cu
->header
.addr_size
;
7401 case DW_FORM_flag_present
:
7402 case DW_FORM_implicit_const
:
7414 case DW_FORM_ref_sig8
:
7417 case DW_FORM_string
:
7418 read_direct_string (abfd
, info_ptr
, &bytes_read
);
7419 info_ptr
+= bytes_read
;
7421 case DW_FORM_sec_offset
:
7423 case DW_FORM_GNU_strp_alt
:
7424 info_ptr
+= cu
->header
.offset_size
;
7426 case DW_FORM_exprloc
:
7428 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7429 info_ptr
+= bytes_read
;
7431 case DW_FORM_block1
:
7432 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
7434 case DW_FORM_block2
:
7435 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
7437 case DW_FORM_block4
:
7438 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
7442 case DW_FORM_ref_udata
:
7443 case DW_FORM_GNU_addr_index
:
7444 case DW_FORM_GNU_str_index
:
7445 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
7447 case DW_FORM_indirect
:
7448 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7449 info_ptr
+= bytes_read
;
7450 /* We need to continue parsing from here, so just go back to
7452 goto skip_attribute
;
7455 error (_("Dwarf Error: Cannot handle %s "
7456 "in DWARF reader [in module %s]"),
7457 dwarf_form_name (form
),
7458 bfd_get_filename (abfd
));
7462 if (abbrev
->has_children
)
7463 return skip_children (reader
, info_ptr
);
7468 /* Locate ORIG_PDI's sibling.
7469 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
7471 static const gdb_byte
*
7472 locate_pdi_sibling (const struct die_reader_specs
*reader
,
7473 struct partial_die_info
*orig_pdi
,
7474 const gdb_byte
*info_ptr
)
7476 /* Do we know the sibling already? */
7478 if (orig_pdi
->sibling
)
7479 return orig_pdi
->sibling
;
7481 /* Are there any children to deal with? */
7483 if (!orig_pdi
->has_children
)
7486 /* Skip the children the long way. */
7488 return skip_children (reader
, info_ptr
);
7491 /* Expand this partial symbol table into a full symbol table. SELF is
7495 dwarf2_read_symtab (struct partial_symtab
*self
,
7496 struct objfile
*objfile
)
7500 warning (_("bug: psymtab for %s is already read in."),
7507 printf_filtered (_("Reading in symbols for %s..."),
7509 gdb_flush (gdb_stdout
);
7512 /* Restore our global data. */
7514 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
7515 dwarf2_objfile_data_key
);
7517 /* If this psymtab is constructed from a debug-only objfile, the
7518 has_section_at_zero flag will not necessarily be correct. We
7519 can get the correct value for this flag by looking at the data
7520 associated with the (presumably stripped) associated objfile. */
7521 if (objfile
->separate_debug_objfile_backlink
)
7523 struct dwarf2_per_objfile
*dpo_backlink
7524 = ((struct dwarf2_per_objfile
*)
7525 objfile_data (objfile
->separate_debug_objfile_backlink
,
7526 dwarf2_objfile_data_key
));
7528 dwarf2_per_objfile
->has_section_at_zero
7529 = dpo_backlink
->has_section_at_zero
;
7532 dwarf2_per_objfile
->reading_partial_symbols
= 0;
7534 psymtab_to_symtab_1 (self
);
7536 /* Finish up the debug error message. */
7538 printf_filtered (_("done.\n"));
7541 process_cu_includes ();
7544 /* Reading in full CUs. */
7546 /* Add PER_CU to the queue. */
7549 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
7550 enum language pretend_language
)
7552 struct dwarf2_queue_item
*item
;
7555 item
= XNEW (struct dwarf2_queue_item
);
7556 item
->per_cu
= per_cu
;
7557 item
->pretend_language
= pretend_language
;
7560 if (dwarf2_queue
== NULL
)
7561 dwarf2_queue
= item
;
7563 dwarf2_queue_tail
->next
= item
;
7565 dwarf2_queue_tail
= item
;
7568 /* If PER_CU is not yet queued, add it to the queue.
7569 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
7571 The result is non-zero if PER_CU was queued, otherwise the result is zero
7572 meaning either PER_CU is already queued or it is already loaded.
7574 N.B. There is an invariant here that if a CU is queued then it is loaded.
7575 The caller is required to load PER_CU if we return non-zero. */
7578 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
7579 struct dwarf2_per_cu_data
*per_cu
,
7580 enum language pretend_language
)
7582 /* We may arrive here during partial symbol reading, if we need full
7583 DIEs to process an unusual case (e.g. template arguments). Do
7584 not queue PER_CU, just tell our caller to load its DIEs. */
7585 if (dwarf2_per_objfile
->reading_partial_symbols
)
7587 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
7592 /* Mark the dependence relation so that we don't flush PER_CU
7594 if (dependent_cu
!= NULL
)
7595 dwarf2_add_dependence (dependent_cu
, per_cu
);
7597 /* If it's already on the queue, we have nothing to do. */
7601 /* If the compilation unit is already loaded, just mark it as
7603 if (per_cu
->cu
!= NULL
)
7605 per_cu
->cu
->last_used
= 0;
7609 /* Add it to the queue. */
7610 queue_comp_unit (per_cu
, pretend_language
);
7615 /* Process the queue. */
7618 process_queue (void)
7620 struct dwarf2_queue_item
*item
, *next_item
;
7622 if (dwarf_read_debug
)
7624 fprintf_unfiltered (gdb_stdlog
,
7625 "Expanding one or more symtabs of objfile %s ...\n",
7626 objfile_name (dwarf2_per_objfile
->objfile
));
7629 /* The queue starts out with one item, but following a DIE reference
7630 may load a new CU, adding it to the end of the queue. */
7631 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
7633 if ((dwarf2_per_objfile
->using_index
7634 ? !item
->per_cu
->v
.quick
->compunit_symtab
7635 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
7636 /* Skip dummy CUs. */
7637 && item
->per_cu
->cu
!= NULL
)
7639 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
7640 unsigned int debug_print_threshold
;
7643 if (per_cu
->is_debug_types
)
7645 struct signatured_type
*sig_type
=
7646 (struct signatured_type
*) per_cu
;
7648 sprintf (buf
, "TU %s at offset 0x%x",
7649 hex_string (sig_type
->signature
),
7650 per_cu
->offset
.sect_off
);
7651 /* There can be 100s of TUs.
7652 Only print them in verbose mode. */
7653 debug_print_threshold
= 2;
7657 sprintf (buf
, "CU at offset 0x%x", per_cu
->offset
.sect_off
);
7658 debug_print_threshold
= 1;
7661 if (dwarf_read_debug
>= debug_print_threshold
)
7662 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
7664 if (per_cu
->is_debug_types
)
7665 process_full_type_unit (per_cu
, item
->pretend_language
);
7667 process_full_comp_unit (per_cu
, item
->pretend_language
);
7669 if (dwarf_read_debug
>= debug_print_threshold
)
7670 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
7673 item
->per_cu
->queued
= 0;
7674 next_item
= item
->next
;
7678 dwarf2_queue_tail
= NULL
;
7680 if (dwarf_read_debug
)
7682 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
7683 objfile_name (dwarf2_per_objfile
->objfile
));
7687 /* Free all allocated queue entries. This function only releases anything if
7688 an error was thrown; if the queue was processed then it would have been
7689 freed as we went along. */
7692 dwarf2_release_queue (void *dummy
)
7694 struct dwarf2_queue_item
*item
, *last
;
7696 item
= dwarf2_queue
;
7699 /* Anything still marked queued is likely to be in an
7700 inconsistent state, so discard it. */
7701 if (item
->per_cu
->queued
)
7703 if (item
->per_cu
->cu
!= NULL
)
7704 free_one_cached_comp_unit (item
->per_cu
);
7705 item
->per_cu
->queued
= 0;
7713 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
7716 /* Read in full symbols for PST, and anything it depends on. */
7719 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
7721 struct dwarf2_per_cu_data
*per_cu
;
7727 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
7728 if (!pst
->dependencies
[i
]->readin
7729 && pst
->dependencies
[i
]->user
== NULL
)
7731 /* Inform about additional files that need to be read in. */
7734 /* FIXME: i18n: Need to make this a single string. */
7735 fputs_filtered (" ", gdb_stdout
);
7737 fputs_filtered ("and ", gdb_stdout
);
7739 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
7740 wrap_here (""); /* Flush output. */
7741 gdb_flush (gdb_stdout
);
7743 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
7746 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
7750 /* It's an include file, no symbols to read for it.
7751 Everything is in the parent symtab. */
7756 dw2_do_instantiate_symtab (per_cu
);
7759 /* Trivial hash function for die_info: the hash value of a DIE
7760 is its offset in .debug_info for this objfile. */
7763 die_hash (const void *item
)
7765 const struct die_info
*die
= (const struct die_info
*) item
;
7767 return die
->offset
.sect_off
;
7770 /* Trivial comparison function for die_info structures: two DIEs
7771 are equal if they have the same offset. */
7774 die_eq (const void *item_lhs
, const void *item_rhs
)
7776 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
7777 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
7779 return die_lhs
->offset
.sect_off
== die_rhs
->offset
.sect_off
;
7782 /* die_reader_func for load_full_comp_unit.
7783 This is identical to read_signatured_type_reader,
7784 but is kept separate for now. */
7787 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
7788 const gdb_byte
*info_ptr
,
7789 struct die_info
*comp_unit_die
,
7793 struct dwarf2_cu
*cu
= reader
->cu
;
7794 enum language
*language_ptr
= (enum language
*) data
;
7796 gdb_assert (cu
->die_hash
== NULL
);
7798 htab_create_alloc_ex (cu
->header
.length
/ 12,
7802 &cu
->comp_unit_obstack
,
7803 hashtab_obstack_allocate
,
7804 dummy_obstack_deallocate
);
7807 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
7808 &info_ptr
, comp_unit_die
);
7809 cu
->dies
= comp_unit_die
;
7810 /* comp_unit_die is not stored in die_hash, no need. */
7812 /* We try not to read any attributes in this function, because not
7813 all CUs needed for references have been loaded yet, and symbol
7814 table processing isn't initialized. But we have to set the CU language,
7815 or we won't be able to build types correctly.
7816 Similarly, if we do not read the producer, we can not apply
7817 producer-specific interpretation. */
7818 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
7821 /* Load the DIEs associated with PER_CU into memory. */
7824 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
7825 enum language pretend_language
)
7827 gdb_assert (! this_cu
->is_debug_types
);
7829 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
7830 load_full_comp_unit_reader
, &pretend_language
);
7833 /* Add a DIE to the delayed physname list. */
7836 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
7837 const char *name
, struct die_info
*die
,
7838 struct dwarf2_cu
*cu
)
7840 struct delayed_method_info mi
;
7842 mi
.fnfield_index
= fnfield_index
;
7846 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
7849 /* A cleanup for freeing the delayed method list. */
7852 free_delayed_list (void *ptr
)
7854 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
7855 if (cu
->method_list
!= NULL
)
7857 VEC_free (delayed_method_info
, cu
->method_list
);
7858 cu
->method_list
= NULL
;
7862 /* Compute the physnames of any methods on the CU's method list.
7864 The computation of method physnames is delayed in order to avoid the
7865 (bad) condition that one of the method's formal parameters is of an as yet
7869 compute_delayed_physnames (struct dwarf2_cu
*cu
)
7872 struct delayed_method_info
*mi
;
7873 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
7875 const char *physname
;
7876 struct fn_fieldlist
*fn_flp
7877 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
7878 physname
= dwarf2_physname (mi
->name
, mi
->die
, cu
);
7879 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
->index
)
7880 = physname
? physname
: "";
7884 /* Go objects should be embedded in a DW_TAG_module DIE,
7885 and it's not clear if/how imported objects will appear.
7886 To keep Go support simple until that's worked out,
7887 go back through what we've read and create something usable.
7888 We could do this while processing each DIE, and feels kinda cleaner,
7889 but that way is more invasive.
7890 This is to, for example, allow the user to type "p var" or "b main"
7891 without having to specify the package name, and allow lookups
7892 of module.object to work in contexts that use the expression
7896 fixup_go_packaging (struct dwarf2_cu
*cu
)
7898 char *package_name
= NULL
;
7899 struct pending
*list
;
7902 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
7904 for (i
= 0; i
< list
->nsyms
; ++i
)
7906 struct symbol
*sym
= list
->symbol
[i
];
7908 if (SYMBOL_LANGUAGE (sym
) == language_go
7909 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
7911 char *this_package_name
= go_symbol_package_name (sym
);
7913 if (this_package_name
== NULL
)
7915 if (package_name
== NULL
)
7916 package_name
= this_package_name
;
7919 if (strcmp (package_name
, this_package_name
) != 0)
7920 complaint (&symfile_complaints
,
7921 _("Symtab %s has objects from two different Go packages: %s and %s"),
7922 (symbol_symtab (sym
) != NULL
7923 ? symtab_to_filename_for_display
7924 (symbol_symtab (sym
))
7925 : objfile_name (cu
->objfile
)),
7926 this_package_name
, package_name
);
7927 xfree (this_package_name
);
7933 if (package_name
!= NULL
)
7935 struct objfile
*objfile
= cu
->objfile
;
7936 const char *saved_package_name
7937 = (const char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
7939 strlen (package_name
));
7940 struct type
*type
= init_type (objfile
, TYPE_CODE_MODULE
, 0,
7941 saved_package_name
);
7944 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
7946 sym
= allocate_symbol (objfile
);
7947 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
7948 SYMBOL_SET_NAMES (sym
, saved_package_name
,
7949 strlen (saved_package_name
), 0, objfile
);
7950 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
7951 e.g., "main" finds the "main" module and not C's main(). */
7952 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
7953 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
7954 SYMBOL_TYPE (sym
) = type
;
7956 add_symbol_to_list (sym
, &global_symbols
);
7958 xfree (package_name
);
7962 /* Return the symtab for PER_CU. This works properly regardless of
7963 whether we're using the index or psymtabs. */
7965 static struct compunit_symtab
*
7966 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
7968 return (dwarf2_per_objfile
->using_index
7969 ? per_cu
->v
.quick
->compunit_symtab
7970 : per_cu
->v
.psymtab
->compunit_symtab
);
7973 /* A helper function for computing the list of all symbol tables
7974 included by PER_CU. */
7977 recursively_compute_inclusions (VEC (compunit_symtab_ptr
) **result
,
7978 htab_t all_children
, htab_t all_type_symtabs
,
7979 struct dwarf2_per_cu_data
*per_cu
,
7980 struct compunit_symtab
*immediate_parent
)
7984 struct compunit_symtab
*cust
;
7985 struct dwarf2_per_cu_data
*iter
;
7987 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
7990 /* This inclusion and its children have been processed. */
7995 /* Only add a CU if it has a symbol table. */
7996 cust
= get_compunit_symtab (per_cu
);
7999 /* If this is a type unit only add its symbol table if we haven't
8000 seen it yet (type unit per_cu's can share symtabs). */
8001 if (per_cu
->is_debug_types
)
8003 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
8007 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
8008 if (cust
->user
== NULL
)
8009 cust
->user
= immediate_parent
;
8014 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
8015 if (cust
->user
== NULL
)
8016 cust
->user
= immediate_parent
;
8021 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
8024 recursively_compute_inclusions (result
, all_children
,
8025 all_type_symtabs
, iter
, cust
);
8029 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
8033 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
8035 gdb_assert (! per_cu
->is_debug_types
);
8037 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
8040 struct dwarf2_per_cu_data
*per_cu_iter
;
8041 struct compunit_symtab
*compunit_symtab_iter
;
8042 VEC (compunit_symtab_ptr
) *result_symtabs
= NULL
;
8043 htab_t all_children
, all_type_symtabs
;
8044 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
8046 /* If we don't have a symtab, we can just skip this case. */
8050 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
8051 NULL
, xcalloc
, xfree
);
8052 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
8053 NULL
, xcalloc
, xfree
);
8056 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
8060 recursively_compute_inclusions (&result_symtabs
, all_children
,
8061 all_type_symtabs
, per_cu_iter
,
8065 /* Now we have a transitive closure of all the included symtabs. */
8066 len
= VEC_length (compunit_symtab_ptr
, result_symtabs
);
8068 = XOBNEWVEC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
8069 struct compunit_symtab
*, len
+ 1);
8071 VEC_iterate (compunit_symtab_ptr
, result_symtabs
, ix
,
8072 compunit_symtab_iter
);
8074 cust
->includes
[ix
] = compunit_symtab_iter
;
8075 cust
->includes
[len
] = NULL
;
8077 VEC_free (compunit_symtab_ptr
, result_symtabs
);
8078 htab_delete (all_children
);
8079 htab_delete (all_type_symtabs
);
8083 /* Compute the 'includes' field for the symtabs of all the CUs we just
8087 process_cu_includes (void)
8090 struct dwarf2_per_cu_data
*iter
;
8093 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
8097 if (! iter
->is_debug_types
)
8098 compute_compunit_symtab_includes (iter
);
8101 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
8104 /* Generate full symbol information for PER_CU, whose DIEs have
8105 already been loaded into memory. */
8108 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
8109 enum language pretend_language
)
8111 struct dwarf2_cu
*cu
= per_cu
->cu
;
8112 struct objfile
*objfile
= per_cu
->objfile
;
8113 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8114 CORE_ADDR lowpc
, highpc
;
8115 struct compunit_symtab
*cust
;
8116 struct cleanup
*back_to
, *delayed_list_cleanup
;
8118 struct block
*static_block
;
8121 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8124 back_to
= make_cleanup (really_free_pendings
, NULL
);
8125 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
8127 cu
->list_in_scope
= &file_symbols
;
8129 cu
->language
= pretend_language
;
8130 cu
->language_defn
= language_def (cu
->language
);
8132 /* Do line number decoding in read_file_scope () */
8133 process_die (cu
->dies
, cu
);
8135 /* For now fudge the Go package. */
8136 if (cu
->language
== language_go
)
8137 fixup_go_packaging (cu
);
8139 /* Now that we have processed all the DIEs in the CU, all the types
8140 should be complete, and it should now be safe to compute all of the
8142 compute_delayed_physnames (cu
);
8143 do_cleanups (delayed_list_cleanup
);
8145 /* Some compilers don't define a DW_AT_high_pc attribute for the
8146 compilation unit. If the DW_AT_high_pc is missing, synthesize
8147 it, by scanning the DIE's below the compilation unit. */
8148 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
8150 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
8151 static_block
= end_symtab_get_static_block (addr
, 0, 1);
8153 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
8154 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
8155 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
8156 addrmap to help ensure it has an accurate map of pc values belonging to
8158 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
8160 cust
= end_symtab_from_static_block (static_block
,
8161 SECT_OFF_TEXT (objfile
), 0);
8165 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
8167 /* Set symtab language to language from DW_AT_language. If the
8168 compilation is from a C file generated by language preprocessors, do
8169 not set the language if it was already deduced by start_subfile. */
8170 if (!(cu
->language
== language_c
8171 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
8172 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8174 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
8175 produce DW_AT_location with location lists but it can be possibly
8176 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
8177 there were bugs in prologue debug info, fixed later in GCC-4.5
8178 by "unwind info for epilogues" patch (which is not directly related).
8180 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
8181 needed, it would be wrong due to missing DW_AT_producer there.
8183 Still one can confuse GDB by using non-standard GCC compilation
8184 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
8186 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
8187 cust
->locations_valid
= 1;
8189 if (gcc_4_minor
>= 5)
8190 cust
->epilogue_unwind_valid
= 1;
8192 cust
->call_site_htab
= cu
->call_site_htab
;
8195 if (dwarf2_per_objfile
->using_index
)
8196 per_cu
->v
.quick
->compunit_symtab
= cust
;
8199 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8200 pst
->compunit_symtab
= cust
;
8204 /* Push it for inclusion processing later. */
8205 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
8207 do_cleanups (back_to
);
8210 /* Generate full symbol information for type unit PER_CU, whose DIEs have
8211 already been loaded into memory. */
8214 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
8215 enum language pretend_language
)
8217 struct dwarf2_cu
*cu
= per_cu
->cu
;
8218 struct objfile
*objfile
= per_cu
->objfile
;
8219 struct compunit_symtab
*cust
;
8220 struct cleanup
*back_to
, *delayed_list_cleanup
;
8221 struct signatured_type
*sig_type
;
8223 gdb_assert (per_cu
->is_debug_types
);
8224 sig_type
= (struct signatured_type
*) per_cu
;
8227 back_to
= make_cleanup (really_free_pendings
, NULL
);
8228 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
8230 cu
->list_in_scope
= &file_symbols
;
8232 cu
->language
= pretend_language
;
8233 cu
->language_defn
= language_def (cu
->language
);
8235 /* The symbol tables are set up in read_type_unit_scope. */
8236 process_die (cu
->dies
, cu
);
8238 /* For now fudge the Go package. */
8239 if (cu
->language
== language_go
)
8240 fixup_go_packaging (cu
);
8242 /* Now that we have processed all the DIEs in the CU, all the types
8243 should be complete, and it should now be safe to compute all of the
8245 compute_delayed_physnames (cu
);
8246 do_cleanups (delayed_list_cleanup
);
8248 /* TUs share symbol tables.
8249 If this is the first TU to use this symtab, complete the construction
8250 of it with end_expandable_symtab. Otherwise, complete the addition of
8251 this TU's symbols to the existing symtab. */
8252 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
8254 cust
= end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
8255 sig_type
->type_unit_group
->compunit_symtab
= cust
;
8259 /* Set symtab language to language from DW_AT_language. If the
8260 compilation is from a C file generated by language preprocessors,
8261 do not set the language if it was already deduced by
8263 if (!(cu
->language
== language_c
8264 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
8265 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8270 augment_type_symtab ();
8271 cust
= sig_type
->type_unit_group
->compunit_symtab
;
8274 if (dwarf2_per_objfile
->using_index
)
8275 per_cu
->v
.quick
->compunit_symtab
= cust
;
8278 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8279 pst
->compunit_symtab
= cust
;
8283 do_cleanups (back_to
);
8286 /* Process an imported unit DIE. */
8289 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8291 struct attribute
*attr
;
8293 /* For now we don't handle imported units in type units. */
8294 if (cu
->per_cu
->is_debug_types
)
8296 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8297 " supported in type units [in module %s]"),
8298 objfile_name (cu
->objfile
));
8301 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8304 struct dwarf2_per_cu_data
*per_cu
;
8308 offset
= dwarf2_get_ref_die_offset (attr
);
8309 is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
8310 per_cu
= dwarf2_find_containing_comp_unit (offset
, is_dwz
, cu
->objfile
);
8312 /* If necessary, add it to the queue and load its DIEs. */
8313 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
8314 load_full_comp_unit (per_cu
, cu
->language
);
8316 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
8321 /* Reset the in_process bit of a die. */
8324 reset_die_in_process (void *arg
)
8326 struct die_info
*die
= (struct die_info
*) arg
;
8328 die
->in_process
= 0;
8331 /* Process a die and its children. */
8334 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8336 struct cleanup
*in_process
;
8338 /* We should only be processing those not already in process. */
8339 gdb_assert (!die
->in_process
);
8341 die
->in_process
= 1;
8342 in_process
= make_cleanup (reset_die_in_process
,die
);
8346 case DW_TAG_padding
:
8348 case DW_TAG_compile_unit
:
8349 case DW_TAG_partial_unit
:
8350 read_file_scope (die
, cu
);
8352 case DW_TAG_type_unit
:
8353 read_type_unit_scope (die
, cu
);
8355 case DW_TAG_subprogram
:
8356 case DW_TAG_inlined_subroutine
:
8357 read_func_scope (die
, cu
);
8359 case DW_TAG_lexical_block
:
8360 case DW_TAG_try_block
:
8361 case DW_TAG_catch_block
:
8362 read_lexical_block_scope (die
, cu
);
8364 case DW_TAG_call_site
:
8365 case DW_TAG_GNU_call_site
:
8366 read_call_site_scope (die
, cu
);
8368 case DW_TAG_class_type
:
8369 case DW_TAG_interface_type
:
8370 case DW_TAG_structure_type
:
8371 case DW_TAG_union_type
:
8372 process_structure_scope (die
, cu
);
8374 case DW_TAG_enumeration_type
:
8375 process_enumeration_scope (die
, cu
);
8378 /* These dies have a type, but processing them does not create
8379 a symbol or recurse to process the children. Therefore we can
8380 read them on-demand through read_type_die. */
8381 case DW_TAG_subroutine_type
:
8382 case DW_TAG_set_type
:
8383 case DW_TAG_array_type
:
8384 case DW_TAG_pointer_type
:
8385 case DW_TAG_ptr_to_member_type
:
8386 case DW_TAG_reference_type
:
8387 case DW_TAG_string_type
:
8390 case DW_TAG_base_type
:
8391 case DW_TAG_subrange_type
:
8392 case DW_TAG_typedef
:
8393 /* Add a typedef symbol for the type definition, if it has a
8395 new_symbol (die
, read_type_die (die
, cu
), cu
);
8397 case DW_TAG_common_block
:
8398 read_common_block (die
, cu
);
8400 case DW_TAG_common_inclusion
:
8402 case DW_TAG_namespace
:
8403 cu
->processing_has_namespace_info
= 1;
8404 read_namespace (die
, cu
);
8407 cu
->processing_has_namespace_info
= 1;
8408 read_module (die
, cu
);
8410 case DW_TAG_imported_declaration
:
8411 cu
->processing_has_namespace_info
= 1;
8412 if (read_namespace_alias (die
, cu
))
8414 /* The declaration is not a global namespace alias: fall through. */
8415 case DW_TAG_imported_module
:
8416 cu
->processing_has_namespace_info
= 1;
8417 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
8418 || cu
->language
!= language_fortran
))
8419 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
8420 dwarf_tag_name (die
->tag
));
8421 read_import_statement (die
, cu
);
8424 case DW_TAG_imported_unit
:
8425 process_imported_unit_die (die
, cu
);
8429 new_symbol (die
, NULL
, cu
);
8433 do_cleanups (in_process
);
8436 /* DWARF name computation. */
8438 /* A helper function for dwarf2_compute_name which determines whether DIE
8439 needs to have the name of the scope prepended to the name listed in the
8443 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
8445 struct attribute
*attr
;
8449 case DW_TAG_namespace
:
8450 case DW_TAG_typedef
:
8451 case DW_TAG_class_type
:
8452 case DW_TAG_interface_type
:
8453 case DW_TAG_structure_type
:
8454 case DW_TAG_union_type
:
8455 case DW_TAG_enumeration_type
:
8456 case DW_TAG_enumerator
:
8457 case DW_TAG_subprogram
:
8458 case DW_TAG_inlined_subroutine
:
8460 case DW_TAG_imported_declaration
:
8463 case DW_TAG_variable
:
8464 case DW_TAG_constant
:
8465 /* We only need to prefix "globally" visible variables. These include
8466 any variable marked with DW_AT_external or any variable that
8467 lives in a namespace. [Variables in anonymous namespaces
8468 require prefixing, but they are not DW_AT_external.] */
8470 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
8472 struct dwarf2_cu
*spec_cu
= cu
;
8474 return die_needs_namespace (die_specification (die
, &spec_cu
),
8478 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
8479 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
8480 && die
->parent
->tag
!= DW_TAG_module
)
8482 /* A variable in a lexical block of some kind does not need a
8483 namespace, even though in C++ such variables may be external
8484 and have a mangled name. */
8485 if (die
->parent
->tag
== DW_TAG_lexical_block
8486 || die
->parent
->tag
== DW_TAG_try_block
8487 || die
->parent
->tag
== DW_TAG_catch_block
8488 || die
->parent
->tag
== DW_TAG_subprogram
)
8497 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
8498 compute the physname for the object, which include a method's:
8499 - formal parameters (C++),
8500 - receiver type (Go),
8502 The term "physname" is a bit confusing.
8503 For C++, for example, it is the demangled name.
8504 For Go, for example, it's the mangled name.
8506 For Ada, return the DIE's linkage name rather than the fully qualified
8507 name. PHYSNAME is ignored..
8509 The result is allocated on the objfile_obstack and canonicalized. */
8512 dwarf2_compute_name (const char *name
,
8513 struct die_info
*die
, struct dwarf2_cu
*cu
,
8516 struct objfile
*objfile
= cu
->objfile
;
8519 name
= dwarf2_name (die
, cu
);
8521 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
8522 but otherwise compute it by typename_concat inside GDB.
8523 FIXME: Actually this is not really true, or at least not always true.
8524 It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle
8525 Fortran names because there is no mangling standard. So new_symbol_full
8526 will set the demangled name to the result of dwarf2_full_name, and it is
8527 the demangled name that GDB uses if it exists. */
8528 if (cu
->language
== language_ada
8529 || (cu
->language
== language_fortran
&& physname
))
8531 /* For Ada unit, we prefer the linkage name over the name, as
8532 the former contains the exported name, which the user expects
8533 to be able to reference. Ideally, we want the user to be able
8534 to reference this entity using either natural or linkage name,
8535 but we haven't started looking at this enhancement yet. */
8536 const char *linkage_name
;
8538 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
8539 if (linkage_name
== NULL
)
8540 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8541 if (linkage_name
!= NULL
)
8542 return linkage_name
;
8545 /* These are the only languages we know how to qualify names in. */
8547 && (cu
->language
== language_cplus
8548 || cu
->language
== language_fortran
|| cu
->language
== language_d
8549 || cu
->language
== language_rust
))
8551 if (die_needs_namespace (die
, cu
))
8555 const char *canonical_name
= NULL
;
8559 prefix
= determine_prefix (die
, cu
);
8560 if (*prefix
!= '\0')
8562 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
8565 buf
.puts (prefixed_name
);
8566 xfree (prefixed_name
);
8571 /* Template parameters may be specified in the DIE's DW_AT_name, or
8572 as children with DW_TAG_template_type_param or
8573 DW_TAG_value_type_param. If the latter, add them to the name
8574 here. If the name already has template parameters, then
8575 skip this step; some versions of GCC emit both, and
8576 it is more efficient to use the pre-computed name.
8578 Something to keep in mind about this process: it is very
8579 unlikely, or in some cases downright impossible, to produce
8580 something that will match the mangled name of a function.
8581 If the definition of the function has the same debug info,
8582 we should be able to match up with it anyway. But fallbacks
8583 using the minimal symbol, for instance to find a method
8584 implemented in a stripped copy of libstdc++, will not work.
8585 If we do not have debug info for the definition, we will have to
8586 match them up some other way.
8588 When we do name matching there is a related problem with function
8589 templates; two instantiated function templates are allowed to
8590 differ only by their return types, which we do not add here. */
8592 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
8594 struct attribute
*attr
;
8595 struct die_info
*child
;
8598 die
->building_fullname
= 1;
8600 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
8604 const gdb_byte
*bytes
;
8605 struct dwarf2_locexpr_baton
*baton
;
8608 if (child
->tag
!= DW_TAG_template_type_param
8609 && child
->tag
!= DW_TAG_template_value_param
)
8620 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
8623 complaint (&symfile_complaints
,
8624 _("template parameter missing DW_AT_type"));
8625 buf
.puts ("UNKNOWN_TYPE");
8628 type
= die_type (child
, cu
);
8630 if (child
->tag
== DW_TAG_template_type_param
)
8632 c_print_type (type
, "", &buf
, -1, 0, &type_print_raw_options
);
8636 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
8639 complaint (&symfile_complaints
,
8640 _("template parameter missing "
8641 "DW_AT_const_value"));
8642 buf
.puts ("UNKNOWN_VALUE");
8646 dwarf2_const_value_attr (attr
, type
, name
,
8647 &cu
->comp_unit_obstack
, cu
,
8648 &value
, &bytes
, &baton
);
8650 if (TYPE_NOSIGN (type
))
8651 /* GDB prints characters as NUMBER 'CHAR'. If that's
8652 changed, this can use value_print instead. */
8653 c_printchar (value
, type
, &buf
);
8656 struct value_print_options opts
;
8659 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
8663 else if (bytes
!= NULL
)
8665 v
= allocate_value (type
);
8666 memcpy (value_contents_writeable (v
), bytes
,
8667 TYPE_LENGTH (type
));
8670 v
= value_from_longest (type
, value
);
8672 /* Specify decimal so that we do not depend on
8674 get_formatted_print_options (&opts
, 'd');
8676 value_print (v
, &buf
, &opts
);
8682 die
->building_fullname
= 0;
8686 /* Close the argument list, with a space if necessary
8687 (nested templates). */
8688 if (!buf
.empty () && buf
.string ().back () == '>')
8695 /* For C++ methods, append formal parameter type
8696 information, if PHYSNAME. */
8698 if (physname
&& die
->tag
== DW_TAG_subprogram
8699 && cu
->language
== language_cplus
)
8701 struct type
*type
= read_type_die (die
, cu
);
8703 c_type_print_args (type
, &buf
, 1, cu
->language
,
8704 &type_print_raw_options
);
8706 if (cu
->language
== language_cplus
)
8708 /* Assume that an artificial first parameter is
8709 "this", but do not crash if it is not. RealView
8710 marks unnamed (and thus unused) parameters as
8711 artificial; there is no way to differentiate
8713 if (TYPE_NFIELDS (type
) > 0
8714 && TYPE_FIELD_ARTIFICIAL (type
, 0)
8715 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
8716 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
8718 buf
.puts (" const");
8722 const std::string
&intermediate_name
= buf
.string ();
8724 if (cu
->language
== language_cplus
)
8726 = dwarf2_canonicalize_name (intermediate_name
.c_str (), cu
,
8727 &objfile
->per_bfd
->storage_obstack
);
8729 /* If we only computed INTERMEDIATE_NAME, or if
8730 INTERMEDIATE_NAME is already canonical, then we need to
8731 copy it to the appropriate obstack. */
8732 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
.c_str ())
8733 name
= ((const char *)
8734 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8735 intermediate_name
.c_str (),
8736 intermediate_name
.length ()));
8738 name
= canonical_name
;
8745 /* Return the fully qualified name of DIE, based on its DW_AT_name.
8746 If scope qualifiers are appropriate they will be added. The result
8747 will be allocated on the storage_obstack, or NULL if the DIE does
8748 not have a name. NAME may either be from a previous call to
8749 dwarf2_name or NULL.
8751 The output string will be canonicalized (if C++). */
8754 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
8756 return dwarf2_compute_name (name
, die
, cu
, 0);
8759 /* Construct a physname for the given DIE in CU. NAME may either be
8760 from a previous call to dwarf2_name or NULL. The result will be
8761 allocated on the objfile_objstack or NULL if the DIE does not have a
8764 The output string will be canonicalized (if C++). */
8767 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
8769 struct objfile
*objfile
= cu
->objfile
;
8770 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
8771 struct cleanup
*back_to
;
8774 /* In this case dwarf2_compute_name is just a shortcut not building anything
8776 if (!die_needs_namespace (die
, cu
))
8777 return dwarf2_compute_name (name
, die
, cu
, 1);
8779 back_to
= make_cleanup (null_cleanup
, NULL
);
8781 mangled
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
8782 if (mangled
== NULL
)
8783 mangled
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8785 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
8786 See https://github.com/rust-lang/rust/issues/32925. */
8787 if (cu
->language
== language_rust
&& mangled
!= NULL
8788 && strchr (mangled
, '{') != NULL
)
8791 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
8793 if (mangled
!= NULL
)
8797 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
8798 type. It is easier for GDB users to search for such functions as
8799 `name(params)' than `long name(params)'. In such case the minimal
8800 symbol names do not match the full symbol names but for template
8801 functions there is never a need to look up their definition from their
8802 declaration so the only disadvantage remains the minimal symbol
8803 variant `long name(params)' does not have the proper inferior type.
8806 if (cu
->language
== language_go
)
8808 /* This is a lie, but we already lie to the caller new_symbol_full.
8809 new_symbol_full assumes we return the mangled name.
8810 This just undoes that lie until things are cleaned up. */
8815 demangled
= gdb_demangle (mangled
,
8816 (DMGL_PARAMS
| DMGL_ANSI
| DMGL_RET_DROP
));
8820 make_cleanup (xfree
, demangled
);
8830 if (canon
== NULL
|| check_physname
)
8832 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
8834 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
8836 /* It may not mean a bug in GDB. The compiler could also
8837 compute DW_AT_linkage_name incorrectly. But in such case
8838 GDB would need to be bug-to-bug compatible. */
8840 complaint (&symfile_complaints
,
8841 _("Computed physname <%s> does not match demangled <%s> "
8842 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
8843 physname
, canon
, mangled
, die
->offset
.sect_off
,
8844 objfile_name (objfile
));
8846 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
8847 is available here - over computed PHYSNAME. It is safer
8848 against both buggy GDB and buggy compilers. */
8862 retval
= ((const char *)
8863 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8864 retval
, strlen (retval
)));
8866 do_cleanups (back_to
);
8870 /* Inspect DIE in CU for a namespace alias. If one exists, record
8871 a new symbol for it.
8873 Returns 1 if a namespace alias was recorded, 0 otherwise. */
8876 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
8878 struct attribute
*attr
;
8880 /* If the die does not have a name, this is not a namespace
8882 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
8886 struct die_info
*d
= die
;
8887 struct dwarf2_cu
*imported_cu
= cu
;
8889 /* If the compiler has nested DW_AT_imported_declaration DIEs,
8890 keep inspecting DIEs until we hit the underlying import. */
8891 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
8892 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
8894 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
8898 d
= follow_die_ref (d
, attr
, &imported_cu
);
8899 if (d
->tag
!= DW_TAG_imported_declaration
)
8903 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
8905 complaint (&symfile_complaints
,
8906 _("DIE at 0x%x has too many recursively imported "
8907 "declarations"), d
->offset
.sect_off
);
8914 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
8916 type
= get_die_type_at_offset (offset
, cu
->per_cu
);
8917 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
8919 /* This declaration is a global namespace alias. Add
8920 a symbol for it whose type is the aliased namespace. */
8921 new_symbol (die
, type
, cu
);
8930 /* Return the using directives repository (global or local?) to use in the
8931 current context for LANGUAGE.
8933 For Ada, imported declarations can materialize renamings, which *may* be
8934 global. However it is impossible (for now?) in DWARF to distinguish
8935 "external" imported declarations and "static" ones. As all imported
8936 declarations seem to be static in all other languages, make them all CU-wide
8937 global only in Ada. */
8939 static struct using_direct
**
8940 using_directives (enum language language
)
8942 if (language
== language_ada
&& context_stack_depth
== 0)
8943 return &global_using_directives
;
8945 return &local_using_directives
;
8948 /* Read the import statement specified by the given die and record it. */
8951 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
8953 struct objfile
*objfile
= cu
->objfile
;
8954 struct attribute
*import_attr
;
8955 struct die_info
*imported_die
, *child_die
;
8956 struct dwarf2_cu
*imported_cu
;
8957 const char *imported_name
;
8958 const char *imported_name_prefix
;
8959 const char *canonical_name
;
8960 const char *import_alias
;
8961 const char *imported_declaration
= NULL
;
8962 const char *import_prefix
;
8963 VEC (const_char_ptr
) *excludes
= NULL
;
8964 struct cleanup
*cleanups
;
8966 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8967 if (import_attr
== NULL
)
8969 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
8970 dwarf_tag_name (die
->tag
));
8975 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
8976 imported_name
= dwarf2_name (imported_die
, imported_cu
);
8977 if (imported_name
== NULL
)
8979 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
8981 The import in the following code:
8995 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
8996 <52> DW_AT_decl_file : 1
8997 <53> DW_AT_decl_line : 6
8998 <54> DW_AT_import : <0x75>
8999 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
9001 <5b> DW_AT_decl_file : 1
9002 <5c> DW_AT_decl_line : 2
9003 <5d> DW_AT_type : <0x6e>
9005 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
9006 <76> DW_AT_byte_size : 4
9007 <77> DW_AT_encoding : 5 (signed)
9009 imports the wrong die ( 0x75 instead of 0x58 ).
9010 This case will be ignored until the gcc bug is fixed. */
9014 /* Figure out the local name after import. */
9015 import_alias
= dwarf2_name (die
, cu
);
9017 /* Figure out where the statement is being imported to. */
9018 import_prefix
= determine_prefix (die
, cu
);
9020 /* Figure out what the scope of the imported die is and prepend it
9021 to the name of the imported die. */
9022 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
9024 if (imported_die
->tag
!= DW_TAG_namespace
9025 && imported_die
->tag
!= DW_TAG_module
)
9027 imported_declaration
= imported_name
;
9028 canonical_name
= imported_name_prefix
;
9030 else if (strlen (imported_name_prefix
) > 0)
9031 canonical_name
= obconcat (&objfile
->objfile_obstack
,
9032 imported_name_prefix
,
9033 (cu
->language
== language_d
? "." : "::"),
9034 imported_name
, (char *) NULL
);
9036 canonical_name
= imported_name
;
9038 cleanups
= make_cleanup (VEC_cleanup (const_char_ptr
), &excludes
);
9040 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
9041 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
9042 child_die
= sibling_die (child_die
))
9044 /* DWARF-4: A Fortran use statement with a “rename list” may be
9045 represented by an imported module entry with an import attribute
9046 referring to the module and owned entries corresponding to those
9047 entities that are renamed as part of being imported. */
9049 if (child_die
->tag
!= DW_TAG_imported_declaration
)
9051 complaint (&symfile_complaints
,
9052 _("child DW_TAG_imported_declaration expected "
9053 "- DIE at 0x%x [in module %s]"),
9054 child_die
->offset
.sect_off
, objfile_name (objfile
));
9058 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
9059 if (import_attr
== NULL
)
9061 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
9062 dwarf_tag_name (child_die
->tag
));
9067 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
9069 imported_name
= dwarf2_name (imported_die
, imported_cu
);
9070 if (imported_name
== NULL
)
9072 complaint (&symfile_complaints
,
9073 _("child DW_TAG_imported_declaration has unknown "
9074 "imported name - DIE at 0x%x [in module %s]"),
9075 child_die
->offset
.sect_off
, objfile_name (objfile
));
9079 VEC_safe_push (const_char_ptr
, excludes
, imported_name
);
9081 process_die (child_die
, cu
);
9084 add_using_directive (using_directives (cu
->language
),
9088 imported_declaration
,
9091 &objfile
->objfile_obstack
);
9093 do_cleanups (cleanups
);
9096 /* Cleanup function for handle_DW_AT_stmt_list. */
9099 free_cu_line_header (void *arg
)
9101 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) arg
;
9103 free_line_header (cu
->line_header
);
9104 cu
->line_header
= NULL
;
9107 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
9108 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
9109 this, it was first present in GCC release 4.3.0. */
9112 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
9114 if (!cu
->checked_producer
)
9115 check_producer (cu
);
9117 return cu
->producer_is_gcc_lt_4_3
;
9121 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
9122 const char **name
, const char **comp_dir
)
9124 /* Find the filename. Do not use dwarf2_name here, since the filename
9125 is not a source language identifier. */
9126 *name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
9127 *comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
9129 if (*comp_dir
== NULL
9130 && producer_is_gcc_lt_4_3 (cu
) && *name
!= NULL
9131 && IS_ABSOLUTE_PATH (*name
))
9133 char *d
= ldirname (*name
);
9137 make_cleanup (xfree
, d
);
9139 if (*comp_dir
!= NULL
)
9141 /* Irix 6.2 native cc prepends <machine>.: to the compilation
9142 directory, get rid of it. */
9143 const char *cp
= strchr (*comp_dir
, ':');
9145 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
9150 *name
= "<unknown>";
9153 /* Handle DW_AT_stmt_list for a compilation unit.
9154 DIE is the DW_TAG_compile_unit die for CU.
9155 COMP_DIR is the compilation directory. LOWPC is passed to
9156 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
9159 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
9160 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
9162 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9163 struct attribute
*attr
;
9164 unsigned int line_offset
;
9165 struct line_header line_header_local
;
9166 hashval_t line_header_local_hash
;
9171 gdb_assert (! cu
->per_cu
->is_debug_types
);
9173 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9177 line_offset
= DW_UNSND (attr
);
9179 /* The line header hash table is only created if needed (it exists to
9180 prevent redundant reading of the line table for partial_units).
9181 If we're given a partial_unit, we'll need it. If we're given a
9182 compile_unit, then use the line header hash table if it's already
9183 created, but don't create one just yet. */
9185 if (dwarf2_per_objfile
->line_header_hash
== NULL
9186 && die
->tag
== DW_TAG_partial_unit
)
9188 dwarf2_per_objfile
->line_header_hash
9189 = htab_create_alloc_ex (127, line_header_hash_voidp
,
9190 line_header_eq_voidp
,
9191 free_line_header_voidp
,
9192 &objfile
->objfile_obstack
,
9193 hashtab_obstack_allocate
,
9194 dummy_obstack_deallocate
);
9197 line_header_local
.offset
.sect_off
= line_offset
;
9198 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
9199 line_header_local_hash
= line_header_hash (&line_header_local
);
9200 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
9202 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
9204 line_header_local_hash
, NO_INSERT
);
9206 /* For DW_TAG_compile_unit we need info like symtab::linetable which
9207 is not present in *SLOT (since if there is something in *SLOT then
9208 it will be for a partial_unit). */
9209 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
9211 gdb_assert (*slot
!= NULL
);
9212 cu
->line_header
= (struct line_header
*) *slot
;
9217 /* dwarf_decode_line_header does not yet provide sufficient information.
9218 We always have to call also dwarf_decode_lines for it. */
9219 cu
->line_header
= dwarf_decode_line_header (line_offset
, cu
);
9220 if (cu
->line_header
== NULL
)
9223 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
9227 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
9229 line_header_local_hash
, INSERT
);
9230 gdb_assert (slot
!= NULL
);
9232 if (slot
!= NULL
&& *slot
== NULL
)
9234 /* This newly decoded line number information unit will be owned
9235 by line_header_hash hash table. */
9236 *slot
= cu
->line_header
;
9240 /* We cannot free any current entry in (*slot) as that struct line_header
9241 may be already used by multiple CUs. Create only temporary decoded
9242 line_header for this CU - it may happen at most once for each line
9243 number information unit. And if we're not using line_header_hash
9244 then this is what we want as well. */
9245 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
9246 make_cleanup (free_cu_line_header
, cu
);
9248 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
9249 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
9253 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
9256 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9258 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9259 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9260 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
9261 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
9262 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
9263 struct attribute
*attr
;
9264 const char *name
= NULL
;
9265 const char *comp_dir
= NULL
;
9266 struct die_info
*child_die
;
9269 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9271 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
9273 /* If we didn't find a lowpc, set it to highpc to avoid complaints
9274 from finish_block. */
9275 if (lowpc
== ((CORE_ADDR
) -1))
9277 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
9279 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
9281 prepare_one_comp_unit (cu
, die
, cu
->language
);
9283 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
9284 standardised yet. As a workaround for the language detection we fall
9285 back to the DW_AT_producer string. */
9286 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
9287 cu
->language
= language_opencl
;
9289 /* Similar hack for Go. */
9290 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
9291 set_cu_language (DW_LANG_Go
, cu
);
9293 dwarf2_start_symtab (cu
, name
, comp_dir
, lowpc
);
9295 /* Decode line number information if present. We do this before
9296 processing child DIEs, so that the line header table is available
9297 for DW_AT_decl_file. */
9298 handle_DW_AT_stmt_list (die
, cu
, comp_dir
, lowpc
);
9300 /* Process all dies in compilation unit. */
9301 if (die
->child
!= NULL
)
9303 child_die
= die
->child
;
9304 while (child_die
&& child_die
->tag
)
9306 process_die (child_die
, cu
);
9307 child_die
= sibling_die (child_die
);
9311 /* Decode macro information, if present. Dwarf 2 macro information
9312 refers to information in the line number info statement program
9313 header, so we can only read it if we've read the header
9315 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
9316 if (attr
&& cu
->line_header
)
9318 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
9319 complaint (&symfile_complaints
,
9320 _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
9322 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
9326 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
9327 if (attr
&& cu
->line_header
)
9329 unsigned int macro_offset
= DW_UNSND (attr
);
9331 dwarf_decode_macros (cu
, macro_offset
, 0);
9335 do_cleanups (back_to
);
9338 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
9339 Create the set of symtabs used by this TU, or if this TU is sharing
9340 symtabs with another TU and the symtabs have already been created
9341 then restore those symtabs in the line header.
9342 We don't need the pc/line-number mapping for type units. */
9345 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
9347 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
9348 struct type_unit_group
*tu_group
;
9350 struct line_header
*lh
;
9351 struct attribute
*attr
;
9352 unsigned int i
, line_offset
;
9353 struct signatured_type
*sig_type
;
9355 gdb_assert (per_cu
->is_debug_types
);
9356 sig_type
= (struct signatured_type
*) per_cu
;
9358 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9360 /* If we're using .gdb_index (includes -readnow) then
9361 per_cu->type_unit_group may not have been set up yet. */
9362 if (sig_type
->type_unit_group
== NULL
)
9363 sig_type
->type_unit_group
= get_type_unit_group (cu
, attr
);
9364 tu_group
= sig_type
->type_unit_group
;
9366 /* If we've already processed this stmt_list there's no real need to
9367 do it again, we could fake it and just recreate the part we need
9368 (file name,index -> symtab mapping). If data shows this optimization
9369 is useful we can do it then. */
9370 first_time
= tu_group
->compunit_symtab
== NULL
;
9372 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
9377 line_offset
= DW_UNSND (attr
);
9378 lh
= dwarf_decode_line_header (line_offset
, cu
);
9383 dwarf2_start_symtab (cu
, "", NULL
, 0);
9386 gdb_assert (tu_group
->symtabs
== NULL
);
9387 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9392 cu
->line_header
= lh
;
9393 make_cleanup (free_cu_line_header
, cu
);
9397 struct compunit_symtab
*cust
= dwarf2_start_symtab (cu
, "", NULL
, 0);
9399 /* Note: We don't assign tu_group->compunit_symtab yet because we're
9400 still initializing it, and our caller (a few levels up)
9401 process_full_type_unit still needs to know if this is the first
9404 tu_group
->num_symtabs
= lh
->num_file_names
;
9405 tu_group
->symtabs
= XNEWVEC (struct symtab
*, lh
->num_file_names
);
9407 for (i
= 0; i
< lh
->num_file_names
; ++i
)
9409 const char *dir
= NULL
;
9410 struct file_entry
*fe
= &lh
->file_names
[i
];
9412 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
9413 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
9414 dwarf2_start_subfile (fe
->name
, dir
);
9416 if (current_subfile
->symtab
== NULL
)
9418 /* NOTE: start_subfile will recognize when it's been passed
9419 a file it has already seen. So we can't assume there's a
9420 simple mapping from lh->file_names to subfiles, plus
9421 lh->file_names may contain dups. */
9422 current_subfile
->symtab
9423 = allocate_symtab (cust
, current_subfile
->name
);
9426 fe
->symtab
= current_subfile
->symtab
;
9427 tu_group
->symtabs
[i
] = fe
->symtab
;
9432 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9434 for (i
= 0; i
< lh
->num_file_names
; ++i
)
9436 struct file_entry
*fe
= &lh
->file_names
[i
];
9438 fe
->symtab
= tu_group
->symtabs
[i
];
9442 /* The main symtab is allocated last. Type units don't have DW_AT_name
9443 so they don't have a "real" (so to speak) symtab anyway.
9444 There is later code that will assign the main symtab to all symbols
9445 that don't have one. We need to handle the case of a symbol with a
9446 missing symtab (DW_AT_decl_file) anyway. */
9449 /* Process DW_TAG_type_unit.
9450 For TUs we want to skip the first top level sibling if it's not the
9451 actual type being defined by this TU. In this case the first top
9452 level sibling is there to provide context only. */
9455 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9457 struct die_info
*child_die
;
9459 prepare_one_comp_unit (cu
, die
, language_minimal
);
9461 /* Initialize (or reinitialize) the machinery for building symtabs.
9462 We do this before processing child DIEs, so that the line header table
9463 is available for DW_AT_decl_file. */
9464 setup_type_unit_groups (die
, cu
);
9466 if (die
->child
!= NULL
)
9468 child_die
= die
->child
;
9469 while (child_die
&& child_die
->tag
)
9471 process_die (child_die
, cu
);
9472 child_die
= sibling_die (child_die
);
9479 http://gcc.gnu.org/wiki/DebugFission
9480 http://gcc.gnu.org/wiki/DebugFissionDWP
9482 To simplify handling of both DWO files ("object" files with the DWARF info)
9483 and DWP files (a file with the DWOs packaged up into one file), we treat
9484 DWP files as having a collection of virtual DWO files. */
9487 hash_dwo_file (const void *item
)
9489 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
9492 hash
= htab_hash_string (dwo_file
->dwo_name
);
9493 if (dwo_file
->comp_dir
!= NULL
)
9494 hash
+= htab_hash_string (dwo_file
->comp_dir
);
9499 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
9501 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
9502 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
9504 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
9506 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
9507 return lhs
->comp_dir
== rhs
->comp_dir
;
9508 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
9511 /* Allocate a hash table for DWO files. */
9514 allocate_dwo_file_hash_table (void)
9516 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9518 return htab_create_alloc_ex (41,
9522 &objfile
->objfile_obstack
,
9523 hashtab_obstack_allocate
,
9524 dummy_obstack_deallocate
);
9527 /* Lookup DWO file DWO_NAME. */
9530 lookup_dwo_file_slot (const char *dwo_name
, const char *comp_dir
)
9532 struct dwo_file find_entry
;
9535 if (dwarf2_per_objfile
->dwo_files
== NULL
)
9536 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
9538 memset (&find_entry
, 0, sizeof (find_entry
));
9539 find_entry
.dwo_name
= dwo_name
;
9540 find_entry
.comp_dir
= comp_dir
;
9541 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
9547 hash_dwo_unit (const void *item
)
9549 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
9551 /* This drops the top 32 bits of the id, but is ok for a hash. */
9552 return dwo_unit
->signature
;
9556 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
9558 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
9559 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
9561 /* The signature is assumed to be unique within the DWO file.
9562 So while object file CU dwo_id's always have the value zero,
9563 that's OK, assuming each object file DWO file has only one CU,
9564 and that's the rule for now. */
9565 return lhs
->signature
== rhs
->signature
;
9568 /* Allocate a hash table for DWO CUs,TUs.
9569 There is one of these tables for each of CUs,TUs for each DWO file. */
9572 allocate_dwo_unit_table (struct objfile
*objfile
)
9574 /* Start out with a pretty small number.
9575 Generally DWO files contain only one CU and maybe some TUs. */
9576 return htab_create_alloc_ex (3,
9580 &objfile
->objfile_obstack
,
9581 hashtab_obstack_allocate
,
9582 dummy_obstack_deallocate
);
9585 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
9587 struct create_dwo_cu_data
9589 struct dwo_file
*dwo_file
;
9590 struct dwo_unit dwo_unit
;
9593 /* die_reader_func for create_dwo_cu. */
9596 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
9597 const gdb_byte
*info_ptr
,
9598 struct die_info
*comp_unit_die
,
9602 struct dwarf2_cu
*cu
= reader
->cu
;
9603 sect_offset offset
= cu
->per_cu
->offset
;
9604 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
9605 struct create_dwo_cu_data
*data
= (struct create_dwo_cu_data
*) datap
;
9606 struct dwo_file
*dwo_file
= data
->dwo_file
;
9607 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
9608 struct attribute
*attr
;
9610 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
9613 complaint (&symfile_complaints
,
9614 _("Dwarf Error: debug entry at offset 0x%x is missing"
9615 " its dwo_id [in module %s]"),
9616 offset
.sect_off
, dwo_file
->dwo_name
);
9620 dwo_unit
->dwo_file
= dwo_file
;
9621 dwo_unit
->signature
= DW_UNSND (attr
);
9622 dwo_unit
->section
= section
;
9623 dwo_unit
->offset
= offset
;
9624 dwo_unit
->length
= cu
->per_cu
->length
;
9626 if (dwarf_read_debug
)
9627 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, dwo_id %s\n",
9628 offset
.sect_off
, hex_string (dwo_unit
->signature
));
9631 /* Create the dwo_unit for the lone CU in DWO_FILE.
9632 Note: This function processes DWO files only, not DWP files. */
9634 static struct dwo_unit
*
9635 create_dwo_cu (struct dwo_file
*dwo_file
)
9637 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9638 struct dwarf2_section_info
*section
= &dwo_file
->sections
.info
;
9639 const gdb_byte
*info_ptr
, *end_ptr
;
9640 struct create_dwo_cu_data create_dwo_cu_data
;
9641 struct dwo_unit
*dwo_unit
;
9643 dwarf2_read_section (objfile
, section
);
9644 info_ptr
= section
->buffer
;
9646 if (info_ptr
== NULL
)
9649 if (dwarf_read_debug
)
9651 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
9652 get_section_name (section
),
9653 get_section_file_name (section
));
9656 create_dwo_cu_data
.dwo_file
= dwo_file
;
9659 end_ptr
= info_ptr
+ section
->size
;
9660 while (info_ptr
< end_ptr
)
9662 struct dwarf2_per_cu_data per_cu
;
9664 memset (&create_dwo_cu_data
.dwo_unit
, 0,
9665 sizeof (create_dwo_cu_data
.dwo_unit
));
9666 memset (&per_cu
, 0, sizeof (per_cu
));
9667 per_cu
.objfile
= objfile
;
9668 per_cu
.is_debug_types
= 0;
9669 per_cu
.offset
.sect_off
= info_ptr
- section
->buffer
;
9670 per_cu
.section
= section
;
9672 init_cutu_and_read_dies_no_follow (&per_cu
, dwo_file
,
9673 create_dwo_cu_reader
,
9674 &create_dwo_cu_data
);
9676 if (create_dwo_cu_data
.dwo_unit
.dwo_file
!= NULL
)
9678 /* If we've already found one, complain. We only support one
9679 because having more than one requires hacking the dwo_name of
9680 each to match, which is highly unlikely to happen. */
9681 if (dwo_unit
!= NULL
)
9683 complaint (&symfile_complaints
,
9684 _("Multiple CUs in DWO file %s [in module %s]"),
9685 dwo_file
->dwo_name
, objfile_name (objfile
));
9689 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
9690 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
9693 info_ptr
+= per_cu
.length
;
9699 /* DWP file .debug_{cu,tu}_index section format:
9700 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
9704 Both index sections have the same format, and serve to map a 64-bit
9705 signature to a set of section numbers. Each section begins with a header,
9706 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
9707 indexes, and a pool of 32-bit section numbers. The index sections will be
9708 aligned at 8-byte boundaries in the file.
9710 The index section header consists of:
9712 V, 32 bit version number
9714 N, 32 bit number of compilation units or type units in the index
9715 M, 32 bit number of slots in the hash table
9717 Numbers are recorded using the byte order of the application binary.
9719 The hash table begins at offset 16 in the section, and consists of an array
9720 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
9721 order of the application binary). Unused slots in the hash table are 0.
9722 (We rely on the extreme unlikeliness of a signature being exactly 0.)
9724 The parallel table begins immediately after the hash table
9725 (at offset 16 + 8 * M from the beginning of the section), and consists of an
9726 array of 32-bit indexes (using the byte order of the application binary),
9727 corresponding 1-1 with slots in the hash table. Each entry in the parallel
9728 table contains a 32-bit index into the pool of section numbers. For unused
9729 hash table slots, the corresponding entry in the parallel table will be 0.
9731 The pool of section numbers begins immediately following the hash table
9732 (at offset 16 + 12 * M from the beginning of the section). The pool of
9733 section numbers consists of an array of 32-bit words (using the byte order
9734 of the application binary). Each item in the array is indexed starting
9735 from 0. The hash table entry provides the index of the first section
9736 number in the set. Additional section numbers in the set follow, and the
9737 set is terminated by a 0 entry (section number 0 is not used in ELF).
9739 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
9740 section must be the first entry in the set, and the .debug_abbrev.dwo must
9741 be the second entry. Other members of the set may follow in any order.
9747 DWP Version 2 combines all the .debug_info, etc. sections into one,
9748 and the entries in the index tables are now offsets into these sections.
9749 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
9752 Index Section Contents:
9754 Hash Table of Signatures dwp_hash_table.hash_table
9755 Parallel Table of Indices dwp_hash_table.unit_table
9756 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
9757 Table of Section Sizes dwp_hash_table.v2.sizes
9759 The index section header consists of:
9761 V, 32 bit version number
9762 L, 32 bit number of columns in the table of section offsets
9763 N, 32 bit number of compilation units or type units in the index
9764 M, 32 bit number of slots in the hash table
9766 Numbers are recorded using the byte order of the application binary.
9768 The hash table has the same format as version 1.
9769 The parallel table of indices has the same format as version 1,
9770 except that the entries are origin-1 indices into the table of sections
9771 offsets and the table of section sizes.
9773 The table of offsets begins immediately following the parallel table
9774 (at offset 16 + 12 * M from the beginning of the section). The table is
9775 a two-dimensional array of 32-bit words (using the byte order of the
9776 application binary), with L columns and N+1 rows, in row-major order.
9777 Each row in the array is indexed starting from 0. The first row provides
9778 a key to the remaining rows: each column in this row provides an identifier
9779 for a debug section, and the offsets in the same column of subsequent rows
9780 refer to that section. The section identifiers are:
9782 DW_SECT_INFO 1 .debug_info.dwo
9783 DW_SECT_TYPES 2 .debug_types.dwo
9784 DW_SECT_ABBREV 3 .debug_abbrev.dwo
9785 DW_SECT_LINE 4 .debug_line.dwo
9786 DW_SECT_LOC 5 .debug_loc.dwo
9787 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
9788 DW_SECT_MACINFO 7 .debug_macinfo.dwo
9789 DW_SECT_MACRO 8 .debug_macro.dwo
9791 The offsets provided by the CU and TU index sections are the base offsets
9792 for the contributions made by each CU or TU to the corresponding section
9793 in the package file. Each CU and TU header contains an abbrev_offset
9794 field, used to find the abbreviations table for that CU or TU within the
9795 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
9796 be interpreted as relative to the base offset given in the index section.
9797 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
9798 should be interpreted as relative to the base offset for .debug_line.dwo,
9799 and offsets into other debug sections obtained from DWARF attributes should
9800 also be interpreted as relative to the corresponding base offset.
9802 The table of sizes begins immediately following the table of offsets.
9803 Like the table of offsets, it is a two-dimensional array of 32-bit words,
9804 with L columns and N rows, in row-major order. Each row in the array is
9805 indexed starting from 1 (row 0 is shared by the two tables).
9809 Hash table lookup is handled the same in version 1 and 2:
9811 We assume that N and M will not exceed 2^32 - 1.
9812 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
9814 Given a 64-bit compilation unit signature or a type signature S, an entry
9815 in the hash table is located as follows:
9817 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
9818 the low-order k bits all set to 1.
9820 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
9822 3) If the hash table entry at index H matches the signature, use that
9823 entry. If the hash table entry at index H is unused (all zeroes),
9824 terminate the search: the signature is not present in the table.
9826 4) Let H = (H + H') modulo M. Repeat at Step 3.
9828 Because M > N and H' and M are relatively prime, the search is guaranteed
9829 to stop at an unused slot or find the match. */
9831 /* Create a hash table to map DWO IDs to their CU/TU entry in
9832 .debug_{info,types}.dwo in DWP_FILE.
9833 Returns NULL if there isn't one.
9834 Note: This function processes DWP files only, not DWO files. */
9836 static struct dwp_hash_table
*
9837 create_dwp_hash_table (struct dwp_file
*dwp_file
, int is_debug_types
)
9839 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9840 bfd
*dbfd
= dwp_file
->dbfd
;
9841 const gdb_byte
*index_ptr
, *index_end
;
9842 struct dwarf2_section_info
*index
;
9843 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
9844 struct dwp_hash_table
*htab
;
9847 index
= &dwp_file
->sections
.tu_index
;
9849 index
= &dwp_file
->sections
.cu_index
;
9851 if (dwarf2_section_empty_p (index
))
9853 dwarf2_read_section (objfile
, index
);
9855 index_ptr
= index
->buffer
;
9856 index_end
= index_ptr
+ index
->size
;
9858 version
= read_4_bytes (dbfd
, index_ptr
);
9861 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
9865 nr_units
= read_4_bytes (dbfd
, index_ptr
);
9867 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
9870 if (version
!= 1 && version
!= 2)
9872 error (_("Dwarf Error: unsupported DWP file version (%s)"
9874 pulongest (version
), dwp_file
->name
);
9876 if (nr_slots
!= (nr_slots
& -nr_slots
))
9878 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
9879 " is not power of 2 [in module %s]"),
9880 pulongest (nr_slots
), dwp_file
->name
);
9883 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
9884 htab
->version
= version
;
9885 htab
->nr_columns
= nr_columns
;
9886 htab
->nr_units
= nr_units
;
9887 htab
->nr_slots
= nr_slots
;
9888 htab
->hash_table
= index_ptr
;
9889 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
9891 /* Exit early if the table is empty. */
9892 if (nr_slots
== 0 || nr_units
== 0
9893 || (version
== 2 && nr_columns
== 0))
9895 /* All must be zero. */
9896 if (nr_slots
!= 0 || nr_units
!= 0
9897 || (version
== 2 && nr_columns
!= 0))
9899 complaint (&symfile_complaints
,
9900 _("Empty DWP but nr_slots,nr_units,nr_columns not"
9901 " all zero [in modules %s]"),
9909 htab
->section_pool
.v1
.indices
=
9910 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
9911 /* It's harder to decide whether the section is too small in v1.
9912 V1 is deprecated anyway so we punt. */
9916 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
9917 int *ids
= htab
->section_pool
.v2
.section_ids
;
9918 /* Reverse map for error checking. */
9919 int ids_seen
[DW_SECT_MAX
+ 1];
9924 error (_("Dwarf Error: bad DWP hash table, too few columns"
9925 " in section table [in module %s]"),
9928 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
9930 error (_("Dwarf Error: bad DWP hash table, too many columns"
9931 " in section table [in module %s]"),
9934 memset (ids
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
9935 memset (ids_seen
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
9936 for (i
= 0; i
< nr_columns
; ++i
)
9938 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
9940 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
9942 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
9943 " in section table [in module %s]"),
9944 id
, dwp_file
->name
);
9946 if (ids_seen
[id
] != -1)
9948 error (_("Dwarf Error: bad DWP hash table, duplicate section"
9949 " id %d in section table [in module %s]"),
9950 id
, dwp_file
->name
);
9955 /* Must have exactly one info or types section. */
9956 if (((ids_seen
[DW_SECT_INFO
] != -1)
9957 + (ids_seen
[DW_SECT_TYPES
] != -1))
9960 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
9961 " DWO info/types section [in module %s]"),
9964 /* Must have an abbrev section. */
9965 if (ids_seen
[DW_SECT_ABBREV
] == -1)
9967 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
9968 " section [in module %s]"),
9971 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
9972 htab
->section_pool
.v2
.sizes
=
9973 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
9974 * nr_units
* nr_columns
);
9975 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
9976 * nr_units
* nr_columns
))
9979 error (_("Dwarf Error: DWP index section is corrupt (too small)"
9988 /* Update SECTIONS with the data from SECTP.
9990 This function is like the other "locate" section routines that are
9991 passed to bfd_map_over_sections, but in this context the sections to
9992 read comes from the DWP V1 hash table, not the full ELF section table.
9994 The result is non-zero for success, or zero if an error was found. */
9997 locate_v1_virtual_dwo_sections (asection
*sectp
,
9998 struct virtual_v1_dwo_sections
*sections
)
10000 const struct dwop_section_names
*names
= &dwop_section_names
;
10002 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10004 /* There can be only one. */
10005 if (sections
->abbrev
.s
.section
!= NULL
)
10007 sections
->abbrev
.s
.section
= sectp
;
10008 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
10010 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
10011 || section_is_p (sectp
->name
, &names
->types_dwo
))
10013 /* There can be only one. */
10014 if (sections
->info_or_types
.s
.section
!= NULL
)
10016 sections
->info_or_types
.s
.section
= sectp
;
10017 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
10019 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10021 /* There can be only one. */
10022 if (sections
->line
.s
.section
!= NULL
)
10024 sections
->line
.s
.section
= sectp
;
10025 sections
->line
.size
= bfd_get_section_size (sectp
);
10027 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10029 /* There can be only one. */
10030 if (sections
->loc
.s
.section
!= NULL
)
10032 sections
->loc
.s
.section
= sectp
;
10033 sections
->loc
.size
= bfd_get_section_size (sectp
);
10035 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10037 /* There can be only one. */
10038 if (sections
->macinfo
.s
.section
!= NULL
)
10040 sections
->macinfo
.s
.section
= sectp
;
10041 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
10043 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10045 /* There can be only one. */
10046 if (sections
->macro
.s
.section
!= NULL
)
10048 sections
->macro
.s
.section
= sectp
;
10049 sections
->macro
.size
= bfd_get_section_size (sectp
);
10051 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10053 /* There can be only one. */
10054 if (sections
->str_offsets
.s
.section
!= NULL
)
10056 sections
->str_offsets
.s
.section
= sectp
;
10057 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
10061 /* No other kind of section is valid. */
10068 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
10069 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
10070 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
10071 This is for DWP version 1 files. */
10073 static struct dwo_unit
*
10074 create_dwo_unit_in_dwp_v1 (struct dwp_file
*dwp_file
,
10075 uint32_t unit_index
,
10076 const char *comp_dir
,
10077 ULONGEST signature
, int is_debug_types
)
10079 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10080 const struct dwp_hash_table
*dwp_htab
=
10081 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10082 bfd
*dbfd
= dwp_file
->dbfd
;
10083 const char *kind
= is_debug_types
? "TU" : "CU";
10084 struct dwo_file
*dwo_file
;
10085 struct dwo_unit
*dwo_unit
;
10086 struct virtual_v1_dwo_sections sections
;
10087 void **dwo_file_slot
;
10088 char *virtual_dwo_name
;
10089 struct cleanup
*cleanups
;
10092 gdb_assert (dwp_file
->version
== 1);
10094 if (dwarf_read_debug
)
10096 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
10098 pulongest (unit_index
), hex_string (signature
),
10102 /* Fetch the sections of this DWO unit.
10103 Put a limit on the number of sections we look for so that bad data
10104 doesn't cause us to loop forever. */
10106 #define MAX_NR_V1_DWO_SECTIONS \
10107 (1 /* .debug_info or .debug_types */ \
10108 + 1 /* .debug_abbrev */ \
10109 + 1 /* .debug_line */ \
10110 + 1 /* .debug_loc */ \
10111 + 1 /* .debug_str_offsets */ \
10112 + 1 /* .debug_macro or .debug_macinfo */ \
10113 + 1 /* trailing zero */)
10115 memset (§ions
, 0, sizeof (sections
));
10116 cleanups
= make_cleanup (null_cleanup
, 0);
10118 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
10121 uint32_t section_nr
=
10122 read_4_bytes (dbfd
,
10123 dwp_htab
->section_pool
.v1
.indices
10124 + (unit_index
+ i
) * sizeof (uint32_t));
10126 if (section_nr
== 0)
10128 if (section_nr
>= dwp_file
->num_sections
)
10130 error (_("Dwarf Error: bad DWP hash table, section number too large"
10131 " [in module %s]"),
10135 sectp
= dwp_file
->elf_sections
[section_nr
];
10136 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
10138 error (_("Dwarf Error: bad DWP hash table, invalid section found"
10139 " [in module %s]"),
10145 || dwarf2_section_empty_p (§ions
.info_or_types
)
10146 || dwarf2_section_empty_p (§ions
.abbrev
))
10148 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
10149 " [in module %s]"),
10152 if (i
== MAX_NR_V1_DWO_SECTIONS
)
10154 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
10155 " [in module %s]"),
10159 /* It's easier for the rest of the code if we fake a struct dwo_file and
10160 have dwo_unit "live" in that. At least for now.
10162 The DWP file can be made up of a random collection of CUs and TUs.
10163 However, for each CU + set of TUs that came from the same original DWO
10164 file, we can combine them back into a virtual DWO file to save space
10165 (fewer struct dwo_file objects to allocate). Remember that for really
10166 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10169 xstrprintf ("virtual-dwo/%d-%d-%d-%d",
10170 get_section_id (§ions
.abbrev
),
10171 get_section_id (§ions
.line
),
10172 get_section_id (§ions
.loc
),
10173 get_section_id (§ions
.str_offsets
));
10174 make_cleanup (xfree
, virtual_dwo_name
);
10175 /* Can we use an existing virtual DWO file? */
10176 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
10177 /* Create one if necessary. */
10178 if (*dwo_file_slot
== NULL
)
10180 if (dwarf_read_debug
)
10182 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
10185 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10187 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
10189 strlen (virtual_dwo_name
));
10190 dwo_file
->comp_dir
= comp_dir
;
10191 dwo_file
->sections
.abbrev
= sections
.abbrev
;
10192 dwo_file
->sections
.line
= sections
.line
;
10193 dwo_file
->sections
.loc
= sections
.loc
;
10194 dwo_file
->sections
.macinfo
= sections
.macinfo
;
10195 dwo_file
->sections
.macro
= sections
.macro
;
10196 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
10197 /* The "str" section is global to the entire DWP file. */
10198 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10199 /* The info or types section is assigned below to dwo_unit,
10200 there's no need to record it in dwo_file.
10201 Also, we can't simply record type sections in dwo_file because
10202 we record a pointer into the vector in dwo_unit. As we collect more
10203 types we'll grow the vector and eventually have to reallocate space
10204 for it, invalidating all copies of pointers into the previous
10206 *dwo_file_slot
= dwo_file
;
10210 if (dwarf_read_debug
)
10212 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10215 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
10217 do_cleanups (cleanups
);
10219 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10220 dwo_unit
->dwo_file
= dwo_file
;
10221 dwo_unit
->signature
= signature
;
10222 dwo_unit
->section
=
10223 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
10224 *dwo_unit
->section
= sections
.info_or_types
;
10225 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10230 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
10231 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
10232 piece within that section used by a TU/CU, return a virtual section
10233 of just that piece. */
10235 static struct dwarf2_section_info
10236 create_dwp_v2_section (struct dwarf2_section_info
*section
,
10237 bfd_size_type offset
, bfd_size_type size
)
10239 struct dwarf2_section_info result
;
10242 gdb_assert (section
!= NULL
);
10243 gdb_assert (!section
->is_virtual
);
10245 memset (&result
, 0, sizeof (result
));
10246 result
.s
.containing_section
= section
;
10247 result
.is_virtual
= 1;
10252 sectp
= get_section_bfd_section (section
);
10254 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
10255 bounds of the real section. This is a pretty-rare event, so just
10256 flag an error (easier) instead of a warning and trying to cope. */
10258 || offset
+ size
> bfd_get_section_size (sectp
))
10260 bfd
*abfd
= sectp
->owner
;
10262 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
10263 " in section %s [in module %s]"),
10264 sectp
? bfd_section_name (abfd
, sectp
) : "<unknown>",
10265 objfile_name (dwarf2_per_objfile
->objfile
));
10268 result
.virtual_offset
= offset
;
10269 result
.size
= size
;
10273 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
10274 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
10275 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
10276 This is for DWP version 2 files. */
10278 static struct dwo_unit
*
10279 create_dwo_unit_in_dwp_v2 (struct dwp_file
*dwp_file
,
10280 uint32_t unit_index
,
10281 const char *comp_dir
,
10282 ULONGEST signature
, int is_debug_types
)
10284 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10285 const struct dwp_hash_table
*dwp_htab
=
10286 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10287 bfd
*dbfd
= dwp_file
->dbfd
;
10288 const char *kind
= is_debug_types
? "TU" : "CU";
10289 struct dwo_file
*dwo_file
;
10290 struct dwo_unit
*dwo_unit
;
10291 struct virtual_v2_dwo_sections sections
;
10292 void **dwo_file_slot
;
10293 char *virtual_dwo_name
;
10294 struct cleanup
*cleanups
;
10297 gdb_assert (dwp_file
->version
== 2);
10299 if (dwarf_read_debug
)
10301 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
10303 pulongest (unit_index
), hex_string (signature
),
10307 /* Fetch the section offsets of this DWO unit. */
10309 memset (§ions
, 0, sizeof (sections
));
10310 cleanups
= make_cleanup (null_cleanup
, 0);
10312 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
10314 uint32_t offset
= read_4_bytes (dbfd
,
10315 dwp_htab
->section_pool
.v2
.offsets
10316 + (((unit_index
- 1) * dwp_htab
->nr_columns
10318 * sizeof (uint32_t)));
10319 uint32_t size
= read_4_bytes (dbfd
,
10320 dwp_htab
->section_pool
.v2
.sizes
10321 + (((unit_index
- 1) * dwp_htab
->nr_columns
10323 * sizeof (uint32_t)));
10325 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
10328 case DW_SECT_TYPES
:
10329 sections
.info_or_types_offset
= offset
;
10330 sections
.info_or_types_size
= size
;
10332 case DW_SECT_ABBREV
:
10333 sections
.abbrev_offset
= offset
;
10334 sections
.abbrev_size
= size
;
10337 sections
.line_offset
= offset
;
10338 sections
.line_size
= size
;
10341 sections
.loc_offset
= offset
;
10342 sections
.loc_size
= size
;
10344 case DW_SECT_STR_OFFSETS
:
10345 sections
.str_offsets_offset
= offset
;
10346 sections
.str_offsets_size
= size
;
10348 case DW_SECT_MACINFO
:
10349 sections
.macinfo_offset
= offset
;
10350 sections
.macinfo_size
= size
;
10352 case DW_SECT_MACRO
:
10353 sections
.macro_offset
= offset
;
10354 sections
.macro_size
= size
;
10359 /* It's easier for the rest of the code if we fake a struct dwo_file and
10360 have dwo_unit "live" in that. At least for now.
10362 The DWP file can be made up of a random collection of CUs and TUs.
10363 However, for each CU + set of TUs that came from the same original DWO
10364 file, we can combine them back into a virtual DWO file to save space
10365 (fewer struct dwo_file objects to allocate). Remember that for really
10366 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10369 xstrprintf ("virtual-dwo/%ld-%ld-%ld-%ld",
10370 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
10371 (long) (sections
.line_size
? sections
.line_offset
: 0),
10372 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
10373 (long) (sections
.str_offsets_size
10374 ? sections
.str_offsets_offset
: 0));
10375 make_cleanup (xfree
, virtual_dwo_name
);
10376 /* Can we use an existing virtual DWO file? */
10377 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
10378 /* Create one if necessary. */
10379 if (*dwo_file_slot
== NULL
)
10381 if (dwarf_read_debug
)
10383 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
10386 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10388 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
10390 strlen (virtual_dwo_name
));
10391 dwo_file
->comp_dir
= comp_dir
;
10392 dwo_file
->sections
.abbrev
=
10393 create_dwp_v2_section (&dwp_file
->sections
.abbrev
,
10394 sections
.abbrev_offset
, sections
.abbrev_size
);
10395 dwo_file
->sections
.line
=
10396 create_dwp_v2_section (&dwp_file
->sections
.line
,
10397 sections
.line_offset
, sections
.line_size
);
10398 dwo_file
->sections
.loc
=
10399 create_dwp_v2_section (&dwp_file
->sections
.loc
,
10400 sections
.loc_offset
, sections
.loc_size
);
10401 dwo_file
->sections
.macinfo
=
10402 create_dwp_v2_section (&dwp_file
->sections
.macinfo
,
10403 sections
.macinfo_offset
, sections
.macinfo_size
);
10404 dwo_file
->sections
.macro
=
10405 create_dwp_v2_section (&dwp_file
->sections
.macro
,
10406 sections
.macro_offset
, sections
.macro_size
);
10407 dwo_file
->sections
.str_offsets
=
10408 create_dwp_v2_section (&dwp_file
->sections
.str_offsets
,
10409 sections
.str_offsets_offset
,
10410 sections
.str_offsets_size
);
10411 /* The "str" section is global to the entire DWP file. */
10412 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10413 /* The info or types section is assigned below to dwo_unit,
10414 there's no need to record it in dwo_file.
10415 Also, we can't simply record type sections in dwo_file because
10416 we record a pointer into the vector in dwo_unit. As we collect more
10417 types we'll grow the vector and eventually have to reallocate space
10418 for it, invalidating all copies of pointers into the previous
10420 *dwo_file_slot
= dwo_file
;
10424 if (dwarf_read_debug
)
10426 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10429 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
10431 do_cleanups (cleanups
);
10433 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10434 dwo_unit
->dwo_file
= dwo_file
;
10435 dwo_unit
->signature
= signature
;
10436 dwo_unit
->section
=
10437 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
10438 *dwo_unit
->section
= create_dwp_v2_section (is_debug_types
10439 ? &dwp_file
->sections
.types
10440 : &dwp_file
->sections
.info
,
10441 sections
.info_or_types_offset
,
10442 sections
.info_or_types_size
);
10443 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10448 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
10449 Returns NULL if the signature isn't found. */
10451 static struct dwo_unit
*
10452 lookup_dwo_unit_in_dwp (struct dwp_file
*dwp_file
, const char *comp_dir
,
10453 ULONGEST signature
, int is_debug_types
)
10455 const struct dwp_hash_table
*dwp_htab
=
10456 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10457 bfd
*dbfd
= dwp_file
->dbfd
;
10458 uint32_t mask
= dwp_htab
->nr_slots
- 1;
10459 uint32_t hash
= signature
& mask
;
10460 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
10463 struct dwo_unit find_dwo_cu
;
10465 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
10466 find_dwo_cu
.signature
= signature
;
10467 slot
= htab_find_slot (is_debug_types
10468 ? dwp_file
->loaded_tus
10469 : dwp_file
->loaded_cus
,
10470 &find_dwo_cu
, INSERT
);
10473 return (struct dwo_unit
*) *slot
;
10475 /* Use a for loop so that we don't loop forever on bad debug info. */
10476 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
10478 ULONGEST signature_in_table
;
10480 signature_in_table
=
10481 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
10482 if (signature_in_table
== signature
)
10484 uint32_t unit_index
=
10485 read_4_bytes (dbfd
,
10486 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
10488 if (dwp_file
->version
== 1)
10490 *slot
= create_dwo_unit_in_dwp_v1 (dwp_file
, unit_index
,
10491 comp_dir
, signature
,
10496 *slot
= create_dwo_unit_in_dwp_v2 (dwp_file
, unit_index
,
10497 comp_dir
, signature
,
10500 return (struct dwo_unit
*) *slot
;
10502 if (signature_in_table
== 0)
10504 hash
= (hash
+ hash2
) & mask
;
10507 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
10508 " [in module %s]"),
10512 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
10513 Open the file specified by FILE_NAME and hand it off to BFD for
10514 preliminary analysis. Return a newly initialized bfd *, which
10515 includes a canonicalized copy of FILE_NAME.
10516 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
10517 SEARCH_CWD is true if the current directory is to be searched.
10518 It will be searched before debug-file-directory.
10519 If successful, the file is added to the bfd include table of the
10520 objfile's bfd (see gdb_bfd_record_inclusion).
10521 If unable to find/open the file, return NULL.
10522 NOTE: This function is derived from symfile_bfd_open. */
10524 static gdb_bfd_ref_ptr
10525 try_open_dwop_file (const char *file_name
, int is_dwp
, int search_cwd
)
10528 char *absolute_name
;
10529 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
10530 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
10531 to debug_file_directory. */
10533 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
10537 if (*debug_file_directory
!= '\0')
10538 search_path
= concat (".", dirname_separator_string
,
10539 debug_file_directory
, (char *) NULL
);
10541 search_path
= xstrdup (".");
10544 search_path
= xstrdup (debug_file_directory
);
10546 flags
= OPF_RETURN_REALPATH
;
10548 flags
|= OPF_SEARCH_IN_PATH
;
10549 desc
= openp (search_path
, flags
, file_name
,
10550 O_RDONLY
| O_BINARY
, &absolute_name
);
10551 xfree (search_path
);
10555 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (absolute_name
, gnutarget
, desc
));
10556 xfree (absolute_name
);
10557 if (sym_bfd
== NULL
)
10559 bfd_set_cacheable (sym_bfd
.get (), 1);
10561 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
10564 /* Success. Record the bfd as having been included by the objfile's bfd.
10565 This is important because things like demangled_names_hash lives in the
10566 objfile's per_bfd space and may have references to things like symbol
10567 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
10568 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
.get ());
10573 /* Try to open DWO file FILE_NAME.
10574 COMP_DIR is the DW_AT_comp_dir attribute.
10575 The result is the bfd handle of the file.
10576 If there is a problem finding or opening the file, return NULL.
10577 Upon success, the canonicalized path of the file is stored in the bfd,
10578 same as symfile_bfd_open. */
10580 static gdb_bfd_ref_ptr
10581 open_dwo_file (const char *file_name
, const char *comp_dir
)
10583 if (IS_ABSOLUTE_PATH (file_name
))
10584 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 0 /*search_cwd*/);
10586 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
10588 if (comp_dir
!= NULL
)
10590 char *path_to_try
= concat (comp_dir
, SLASH_STRING
,
10591 file_name
, (char *) NULL
);
10593 /* NOTE: If comp_dir is a relative path, this will also try the
10594 search path, which seems useful. */
10595 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (path_to_try
, 0 /*is_dwp*/,
10596 1 /*search_cwd*/));
10597 xfree (path_to_try
);
10602 /* That didn't work, try debug-file-directory, which, despite its name,
10603 is a list of paths. */
10605 if (*debug_file_directory
== '\0')
10608 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 1 /*search_cwd*/);
10611 /* This function is mapped across the sections and remembers the offset and
10612 size of each of the DWO debugging sections we are interested in. */
10615 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
10617 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
10618 const struct dwop_section_names
*names
= &dwop_section_names
;
10620 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10622 dwo_sections
->abbrev
.s
.section
= sectp
;
10623 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
10625 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
10627 dwo_sections
->info
.s
.section
= sectp
;
10628 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
10630 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10632 dwo_sections
->line
.s
.section
= sectp
;
10633 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
10635 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10637 dwo_sections
->loc
.s
.section
= sectp
;
10638 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
10640 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10642 dwo_sections
->macinfo
.s
.section
= sectp
;
10643 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
10645 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10647 dwo_sections
->macro
.s
.section
= sectp
;
10648 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
10650 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
10652 dwo_sections
->str
.s
.section
= sectp
;
10653 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
10655 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10657 dwo_sections
->str_offsets
.s
.section
= sectp
;
10658 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
10660 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
10662 struct dwarf2_section_info type_section
;
10664 memset (&type_section
, 0, sizeof (type_section
));
10665 type_section
.s
.section
= sectp
;
10666 type_section
.size
= bfd_get_section_size (sectp
);
10667 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
10672 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
10673 by PER_CU. This is for the non-DWP case.
10674 The result is NULL if DWO_NAME can't be found. */
10676 static struct dwo_file
*
10677 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
10678 const char *dwo_name
, const char *comp_dir
)
10680 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10681 struct dwo_file
*dwo_file
;
10682 struct cleanup
*cleanups
;
10684 gdb_bfd_ref_ptr
dbfd (open_dwo_file (dwo_name
, comp_dir
));
10687 if (dwarf_read_debug
)
10688 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
10691 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10692 dwo_file
->dwo_name
= dwo_name
;
10693 dwo_file
->comp_dir
= comp_dir
;
10694 dwo_file
->dbfd
= dbfd
.release ();
10696 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwo_file
);
10698 bfd_map_over_sections (dwo_file
->dbfd
, dwarf2_locate_dwo_sections
,
10699 &dwo_file
->sections
);
10701 dwo_file
->cu
= create_dwo_cu (dwo_file
);
10703 create_debug_types_hash_table (dwo_file
, dwo_file
->sections
.types
,
10706 discard_cleanups (cleanups
);
10708 if (dwarf_read_debug
)
10709 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
10714 /* This function is mapped across the sections and remembers the offset and
10715 size of each of the DWP debugging sections common to version 1 and 2 that
10716 we are interested in. */
10719 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
10720 void *dwp_file_ptr
)
10722 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
10723 const struct dwop_section_names
*names
= &dwop_section_names
;
10724 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
10726 /* Record the ELF section number for later lookup: this is what the
10727 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10728 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
10729 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
10731 /* Look for specific sections that we need. */
10732 if (section_is_p (sectp
->name
, &names
->str_dwo
))
10734 dwp_file
->sections
.str
.s
.section
= sectp
;
10735 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
10737 else if (section_is_p (sectp
->name
, &names
->cu_index
))
10739 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
10740 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
10742 else if (section_is_p (sectp
->name
, &names
->tu_index
))
10744 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
10745 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
10749 /* This function is mapped across the sections and remembers the offset and
10750 size of each of the DWP version 2 debugging sections that we are interested
10751 in. This is split into a separate function because we don't know if we
10752 have version 1 or 2 until we parse the cu_index/tu_index sections. */
10755 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
10757 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
10758 const struct dwop_section_names
*names
= &dwop_section_names
;
10759 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
10761 /* Record the ELF section number for later lookup: this is what the
10762 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10763 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
10764 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
10766 /* Look for specific sections that we need. */
10767 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10769 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
10770 dwp_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
10772 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
10774 dwp_file
->sections
.info
.s
.section
= sectp
;
10775 dwp_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
10777 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10779 dwp_file
->sections
.line
.s
.section
= sectp
;
10780 dwp_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
10782 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10784 dwp_file
->sections
.loc
.s
.section
= sectp
;
10785 dwp_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
10787 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10789 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
10790 dwp_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
10792 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10794 dwp_file
->sections
.macro
.s
.section
= sectp
;
10795 dwp_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
10797 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10799 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
10800 dwp_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
10802 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
10804 dwp_file
->sections
.types
.s
.section
= sectp
;
10805 dwp_file
->sections
.types
.size
= bfd_get_section_size (sectp
);
10809 /* Hash function for dwp_file loaded CUs/TUs. */
10812 hash_dwp_loaded_cutus (const void *item
)
10814 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
10816 /* This drops the top 32 bits of the signature, but is ok for a hash. */
10817 return dwo_unit
->signature
;
10820 /* Equality function for dwp_file loaded CUs/TUs. */
10823 eq_dwp_loaded_cutus (const void *a
, const void *b
)
10825 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
10826 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
10828 return dua
->signature
== dub
->signature
;
10831 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
10834 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
10836 return htab_create_alloc_ex (3,
10837 hash_dwp_loaded_cutus
,
10838 eq_dwp_loaded_cutus
,
10840 &objfile
->objfile_obstack
,
10841 hashtab_obstack_allocate
,
10842 dummy_obstack_deallocate
);
10845 /* Try to open DWP file FILE_NAME.
10846 The result is the bfd handle of the file.
10847 If there is a problem finding or opening the file, return NULL.
10848 Upon success, the canonicalized path of the file is stored in the bfd,
10849 same as symfile_bfd_open. */
10851 static gdb_bfd_ref_ptr
10852 open_dwp_file (const char *file_name
)
10854 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (file_name
, 1 /*is_dwp*/,
10855 1 /*search_cwd*/));
10859 /* Work around upstream bug 15652.
10860 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
10861 [Whether that's a "bug" is debatable, but it is getting in our way.]
10862 We have no real idea where the dwp file is, because gdb's realpath-ing
10863 of the executable's path may have discarded the needed info.
10864 [IWBN if the dwp file name was recorded in the executable, akin to
10865 .gnu_debuglink, but that doesn't exist yet.]
10866 Strip the directory from FILE_NAME and search again. */
10867 if (*debug_file_directory
!= '\0')
10869 /* Don't implicitly search the current directory here.
10870 If the user wants to search "." to handle this case,
10871 it must be added to debug-file-directory. */
10872 return try_open_dwop_file (lbasename (file_name
), 1 /*is_dwp*/,
10879 /* Initialize the use of the DWP file for the current objfile.
10880 By convention the name of the DWP file is ${objfile}.dwp.
10881 The result is NULL if it can't be found. */
10883 static struct dwp_file
*
10884 open_and_init_dwp_file (void)
10886 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10887 struct dwp_file
*dwp_file
;
10889 struct cleanup
*cleanups
= make_cleanup (null_cleanup
, 0);
10891 /* Try to find first .dwp for the binary file before any symbolic links
10894 /* If the objfile is a debug file, find the name of the real binary
10895 file and get the name of dwp file from there. */
10896 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
10898 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
10899 const char *backlink_basename
= lbasename (backlink
->original_name
);
10900 char *debug_dirname
= ldirname (objfile
->original_name
);
10902 make_cleanup (xfree
, debug_dirname
);
10903 dwp_name
= xstrprintf ("%s%s%s.dwp", debug_dirname
,
10904 SLASH_STRING
, backlink_basename
);
10907 dwp_name
= xstrprintf ("%s.dwp", objfile
->original_name
);
10908 make_cleanup (xfree
, dwp_name
);
10910 gdb_bfd_ref_ptr
dbfd (open_dwp_file (dwp_name
));
10912 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
10914 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
10915 dwp_name
= xstrprintf ("%s.dwp", objfile_name (objfile
));
10916 make_cleanup (xfree
, dwp_name
);
10917 dbfd
= open_dwp_file (dwp_name
);
10922 if (dwarf_read_debug
)
10923 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
);
10924 do_cleanups (cleanups
);
10927 dwp_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_file
);
10928 dwp_file
->name
= bfd_get_filename (dbfd
.get ());
10929 dwp_file
->dbfd
= dbfd
.release ();
10930 do_cleanups (cleanups
);
10932 /* +1: section 0 is unused */
10933 dwp_file
->num_sections
= bfd_count_sections (dwp_file
->dbfd
) + 1;
10934 dwp_file
->elf_sections
=
10935 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
10936 dwp_file
->num_sections
, asection
*);
10938 bfd_map_over_sections (dwp_file
->dbfd
, dwarf2_locate_common_dwp_sections
,
10941 dwp_file
->cus
= create_dwp_hash_table (dwp_file
, 0);
10943 dwp_file
->tus
= create_dwp_hash_table (dwp_file
, 1);
10945 /* The DWP file version is stored in the hash table. Oh well. */
10946 if (dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
10948 /* Technically speaking, we should try to limp along, but this is
10949 pretty bizarre. We use pulongest here because that's the established
10950 portability solution (e.g, we cannot use %u for uint32_t). */
10951 error (_("Dwarf Error: DWP file CU version %s doesn't match"
10952 " TU version %s [in DWP file %s]"),
10953 pulongest (dwp_file
->cus
->version
),
10954 pulongest (dwp_file
->tus
->version
), dwp_name
);
10956 dwp_file
->version
= dwp_file
->cus
->version
;
10958 if (dwp_file
->version
== 2)
10959 bfd_map_over_sections (dwp_file
->dbfd
, dwarf2_locate_v2_dwp_sections
,
10962 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
10963 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
10965 if (dwarf_read_debug
)
10967 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
10968 fprintf_unfiltered (gdb_stdlog
,
10969 " %s CUs, %s TUs\n",
10970 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
10971 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
10977 /* Wrapper around open_and_init_dwp_file, only open it once. */
10979 static struct dwp_file
*
10980 get_dwp_file (void)
10982 if (! dwarf2_per_objfile
->dwp_checked
)
10984 dwarf2_per_objfile
->dwp_file
= open_and_init_dwp_file ();
10985 dwarf2_per_objfile
->dwp_checked
= 1;
10987 return dwarf2_per_objfile
->dwp_file
;
10990 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
10991 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
10992 or in the DWP file for the objfile, referenced by THIS_UNIT.
10993 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
10994 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
10996 This is called, for example, when wanting to read a variable with a
10997 complex location. Therefore we don't want to do file i/o for every call.
10998 Therefore we don't want to look for a DWO file on every call.
10999 Therefore we first see if we've already seen SIGNATURE in a DWP file,
11000 then we check if we've already seen DWO_NAME, and only THEN do we check
11003 The result is a pointer to the dwo_unit object or NULL if we didn't find it
11004 (dwo_id mismatch or couldn't find the DWO/DWP file). */
11006 static struct dwo_unit
*
11007 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
11008 const char *dwo_name
, const char *comp_dir
,
11009 ULONGEST signature
, int is_debug_types
)
11011 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11012 const char *kind
= is_debug_types
? "TU" : "CU";
11013 void **dwo_file_slot
;
11014 struct dwo_file
*dwo_file
;
11015 struct dwp_file
*dwp_file
;
11017 /* First see if there's a DWP file.
11018 If we have a DWP file but didn't find the DWO inside it, don't
11019 look for the original DWO file. It makes gdb behave differently
11020 depending on whether one is debugging in the build tree. */
11022 dwp_file
= get_dwp_file ();
11023 if (dwp_file
!= NULL
)
11025 const struct dwp_hash_table
*dwp_htab
=
11026 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
11028 if (dwp_htab
!= NULL
)
11030 struct dwo_unit
*dwo_cutu
=
11031 lookup_dwo_unit_in_dwp (dwp_file
, comp_dir
,
11032 signature
, is_debug_types
);
11034 if (dwo_cutu
!= NULL
)
11036 if (dwarf_read_debug
)
11038 fprintf_unfiltered (gdb_stdlog
,
11039 "Virtual DWO %s %s found: @%s\n",
11040 kind
, hex_string (signature
),
11041 host_address_to_string (dwo_cutu
));
11049 /* No DWP file, look for the DWO file. */
11051 dwo_file_slot
= lookup_dwo_file_slot (dwo_name
, comp_dir
);
11052 if (*dwo_file_slot
== NULL
)
11054 /* Read in the file and build a table of the CUs/TUs it contains. */
11055 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
11057 /* NOTE: This will be NULL if unable to open the file. */
11058 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
11060 if (dwo_file
!= NULL
)
11062 struct dwo_unit
*dwo_cutu
= NULL
;
11064 if (is_debug_types
&& dwo_file
->tus
)
11066 struct dwo_unit find_dwo_cutu
;
11068 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
11069 find_dwo_cutu
.signature
= signature
;
11071 = (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_cutu
);
11073 else if (!is_debug_types
&& dwo_file
->cu
)
11075 if (signature
== dwo_file
->cu
->signature
)
11076 dwo_cutu
= dwo_file
->cu
;
11079 if (dwo_cutu
!= NULL
)
11081 if (dwarf_read_debug
)
11083 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
11084 kind
, dwo_name
, hex_string (signature
),
11085 host_address_to_string (dwo_cutu
));
11092 /* We didn't find it. This could mean a dwo_id mismatch, or
11093 someone deleted the DWO/DWP file, or the search path isn't set up
11094 correctly to find the file. */
11096 if (dwarf_read_debug
)
11098 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
11099 kind
, dwo_name
, hex_string (signature
));
11102 /* This is a warning and not a complaint because it can be caused by
11103 pilot error (e.g., user accidentally deleting the DWO). */
11105 /* Print the name of the DWP file if we looked there, helps the user
11106 better diagnose the problem. */
11107 char *dwp_text
= NULL
;
11108 struct cleanup
*cleanups
;
11110 if (dwp_file
!= NULL
)
11111 dwp_text
= xstrprintf (" [in DWP file %s]", lbasename (dwp_file
->name
));
11112 cleanups
= make_cleanup (xfree
, dwp_text
);
11114 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x"
11115 " [in module %s]"),
11116 kind
, dwo_name
, hex_string (signature
),
11117 dwp_text
!= NULL
? dwp_text
: "",
11118 this_unit
->is_debug_types
? "TU" : "CU",
11119 this_unit
->offset
.sect_off
, objfile_name (objfile
));
11121 do_cleanups (cleanups
);
11126 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
11127 See lookup_dwo_cutu_unit for details. */
11129 static struct dwo_unit
*
11130 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
11131 const char *dwo_name
, const char *comp_dir
,
11132 ULONGEST signature
)
11134 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
11137 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
11138 See lookup_dwo_cutu_unit for details. */
11140 static struct dwo_unit
*
11141 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
11142 const char *dwo_name
, const char *comp_dir
)
11144 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
11147 /* Traversal function for queue_and_load_all_dwo_tus. */
11150 queue_and_load_dwo_tu (void **slot
, void *info
)
11152 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
11153 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
11154 ULONGEST signature
= dwo_unit
->signature
;
11155 struct signatured_type
*sig_type
=
11156 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
11158 if (sig_type
!= NULL
)
11160 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
11162 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
11163 a real dependency of PER_CU on SIG_TYPE. That is detected later
11164 while processing PER_CU. */
11165 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
11166 load_full_type_unit (sig_cu
);
11167 VEC_safe_push (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, sig_cu
);
11173 /* Queue all TUs contained in the DWO of PER_CU to be read in.
11174 The DWO may have the only definition of the type, though it may not be
11175 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
11176 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
11179 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
11181 struct dwo_unit
*dwo_unit
;
11182 struct dwo_file
*dwo_file
;
11184 gdb_assert (!per_cu
->is_debug_types
);
11185 gdb_assert (get_dwp_file () == NULL
);
11186 gdb_assert (per_cu
->cu
!= NULL
);
11188 dwo_unit
= per_cu
->cu
->dwo_unit
;
11189 gdb_assert (dwo_unit
!= NULL
);
11191 dwo_file
= dwo_unit
->dwo_file
;
11192 if (dwo_file
->tus
!= NULL
)
11193 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
11196 /* Free all resources associated with DWO_FILE.
11197 Close the DWO file and munmap the sections.
11198 All memory should be on the objfile obstack. */
11201 free_dwo_file (struct dwo_file
*dwo_file
, struct objfile
*objfile
)
11204 /* Note: dbfd is NULL for virtual DWO files. */
11205 gdb_bfd_unref (dwo_file
->dbfd
);
11207 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
11210 /* Wrapper for free_dwo_file for use in cleanups. */
11213 free_dwo_file_cleanup (void *arg
)
11215 struct dwo_file
*dwo_file
= (struct dwo_file
*) arg
;
11216 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11218 free_dwo_file (dwo_file
, objfile
);
11221 /* Traversal function for free_dwo_files. */
11224 free_dwo_file_from_slot (void **slot
, void *info
)
11226 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
11227 struct objfile
*objfile
= (struct objfile
*) info
;
11229 free_dwo_file (dwo_file
, objfile
);
11234 /* Free all resources associated with DWO_FILES. */
11237 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
11239 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
11242 /* Read in various DIEs. */
11244 /* qsort helper for inherit_abstract_dies. */
11247 unsigned_int_compar (const void *ap
, const void *bp
)
11249 unsigned int a
= *(unsigned int *) ap
;
11250 unsigned int b
= *(unsigned int *) bp
;
11252 return (a
> b
) - (b
> a
);
11255 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
11256 Inherit only the children of the DW_AT_abstract_origin DIE not being
11257 already referenced by DW_AT_abstract_origin from the children of the
11261 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
11263 struct die_info
*child_die
;
11264 unsigned die_children_count
;
11265 /* CU offsets which were referenced by children of the current DIE. */
11266 sect_offset
*offsets
;
11267 sect_offset
*offsets_end
, *offsetp
;
11268 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
11269 struct die_info
*origin_die
;
11270 /* Iterator of the ORIGIN_DIE children. */
11271 struct die_info
*origin_child_die
;
11272 struct cleanup
*cleanups
;
11273 struct attribute
*attr
;
11274 struct dwarf2_cu
*origin_cu
;
11275 struct pending
**origin_previous_list_in_scope
;
11277 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
11281 /* Note that following die references may follow to a die in a
11285 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
11287 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
11289 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
11290 origin_cu
->list_in_scope
= cu
->list_in_scope
;
11292 if (die
->tag
!= origin_die
->tag
11293 && !(die
->tag
== DW_TAG_inlined_subroutine
11294 && origin_die
->tag
== DW_TAG_subprogram
))
11295 complaint (&symfile_complaints
,
11296 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
11297 die
->offset
.sect_off
, origin_die
->offset
.sect_off
);
11299 child_die
= die
->child
;
11300 die_children_count
= 0;
11301 while (child_die
&& child_die
->tag
)
11303 child_die
= sibling_die (child_die
);
11304 die_children_count
++;
11306 offsets
= XNEWVEC (sect_offset
, die_children_count
);
11307 cleanups
= make_cleanup (xfree
, offsets
);
11309 offsets_end
= offsets
;
11310 for (child_die
= die
->child
;
11311 child_die
&& child_die
->tag
;
11312 child_die
= sibling_die (child_die
))
11314 struct die_info
*child_origin_die
;
11315 struct dwarf2_cu
*child_origin_cu
;
11317 /* We are trying to process concrete instance entries:
11318 DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
11319 it's not relevant to our analysis here. i.e. detecting DIEs that are
11320 present in the abstract instance but not referenced in the concrete
11322 if (child_die
->tag
== DW_TAG_call_site
11323 || child_die
->tag
== DW_TAG_GNU_call_site
)
11326 /* For each CHILD_DIE, find the corresponding child of
11327 ORIGIN_DIE. If there is more than one layer of
11328 DW_AT_abstract_origin, follow them all; there shouldn't be,
11329 but GCC versions at least through 4.4 generate this (GCC PR
11331 child_origin_die
= child_die
;
11332 child_origin_cu
= cu
;
11335 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
11339 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
11343 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
11344 counterpart may exist. */
11345 if (child_origin_die
!= child_die
)
11347 if (child_die
->tag
!= child_origin_die
->tag
11348 && !(child_die
->tag
== DW_TAG_inlined_subroutine
11349 && child_origin_die
->tag
== DW_TAG_subprogram
))
11350 complaint (&symfile_complaints
,
11351 _("Child DIE 0x%x and its abstract origin 0x%x have "
11352 "different tags"), child_die
->offset
.sect_off
,
11353 child_origin_die
->offset
.sect_off
);
11354 if (child_origin_die
->parent
!= origin_die
)
11355 complaint (&symfile_complaints
,
11356 _("Child DIE 0x%x and its abstract origin 0x%x have "
11357 "different parents"), child_die
->offset
.sect_off
,
11358 child_origin_die
->offset
.sect_off
);
11360 *offsets_end
++ = child_origin_die
->offset
;
11363 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
11364 unsigned_int_compar
);
11365 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
11366 if (offsetp
[-1].sect_off
== offsetp
->sect_off
)
11367 complaint (&symfile_complaints
,
11368 _("Multiple children of DIE 0x%x refer "
11369 "to DIE 0x%x as their abstract origin"),
11370 die
->offset
.sect_off
, offsetp
->sect_off
);
11373 origin_child_die
= origin_die
->child
;
11374 while (origin_child_die
&& origin_child_die
->tag
)
11376 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
11377 while (offsetp
< offsets_end
11378 && offsetp
->sect_off
< origin_child_die
->offset
.sect_off
)
11380 if (offsetp
>= offsets_end
11381 || offsetp
->sect_off
> origin_child_die
->offset
.sect_off
)
11383 /* Found that ORIGIN_CHILD_DIE is really not referenced.
11384 Check whether we're already processing ORIGIN_CHILD_DIE.
11385 This can happen with mutually referenced abstract_origins.
11387 if (!origin_child_die
->in_process
)
11388 process_die (origin_child_die
, origin_cu
);
11390 origin_child_die
= sibling_die (origin_child_die
);
11392 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
11394 do_cleanups (cleanups
);
11398 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11400 struct objfile
*objfile
= cu
->objfile
;
11401 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11402 struct context_stack
*newobj
;
11405 struct die_info
*child_die
;
11406 struct attribute
*attr
, *call_line
, *call_file
;
11408 CORE_ADDR baseaddr
;
11409 struct block
*block
;
11410 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
11411 VEC (symbolp
) *template_args
= NULL
;
11412 struct template_symbol
*templ_func
= NULL
;
11416 /* If we do not have call site information, we can't show the
11417 caller of this inlined function. That's too confusing, so
11418 only use the scope for local variables. */
11419 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
11420 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
11421 if (call_line
== NULL
|| call_file
== NULL
)
11423 read_lexical_block_scope (die
, cu
);
11428 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11430 name
= dwarf2_name (die
, cu
);
11432 /* Ignore functions with missing or empty names. These are actually
11433 illegal according to the DWARF standard. */
11436 complaint (&symfile_complaints
,
11437 _("missing name for subprogram DIE at %d"),
11438 die
->offset
.sect_off
);
11442 /* Ignore functions with missing or invalid low and high pc attributes. */
11443 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
11444 <= PC_BOUNDS_INVALID
)
11446 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
11447 if (!attr
|| !DW_UNSND (attr
))
11448 complaint (&symfile_complaints
,
11449 _("cannot get low and high bounds "
11450 "for subprogram DIE at %d"),
11451 die
->offset
.sect_off
);
11455 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11456 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
11458 /* If we have any template arguments, then we must allocate a
11459 different sort of symbol. */
11460 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
11462 if (child_die
->tag
== DW_TAG_template_type_param
11463 || child_die
->tag
== DW_TAG_template_value_param
)
11465 templ_func
= allocate_template_symbol (objfile
);
11466 templ_func
->base
.is_cplus_template_function
= 1;
11471 newobj
= push_context (0, lowpc
);
11472 newobj
->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
11473 (struct symbol
*) templ_func
);
11475 /* If there is a location expression for DW_AT_frame_base, record
11477 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
11479 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
11481 /* If there is a location for the static link, record it. */
11482 newobj
->static_link
= NULL
;
11483 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
11486 newobj
->static_link
11487 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
11488 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
);
11491 cu
->list_in_scope
= &local_symbols
;
11493 if (die
->child
!= NULL
)
11495 child_die
= die
->child
;
11496 while (child_die
&& child_die
->tag
)
11498 if (child_die
->tag
== DW_TAG_template_type_param
11499 || child_die
->tag
== DW_TAG_template_value_param
)
11501 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
11504 VEC_safe_push (symbolp
, template_args
, arg
);
11507 process_die (child_die
, cu
);
11508 child_die
= sibling_die (child_die
);
11512 inherit_abstract_dies (die
, cu
);
11514 /* If we have a DW_AT_specification, we might need to import using
11515 directives from the context of the specification DIE. See the
11516 comment in determine_prefix. */
11517 if (cu
->language
== language_cplus
11518 && dwarf2_attr (die
, DW_AT_specification
, cu
))
11520 struct dwarf2_cu
*spec_cu
= cu
;
11521 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
11525 child_die
= spec_die
->child
;
11526 while (child_die
&& child_die
->tag
)
11528 if (child_die
->tag
== DW_TAG_imported_module
)
11529 process_die (child_die
, spec_cu
);
11530 child_die
= sibling_die (child_die
);
11533 /* In some cases, GCC generates specification DIEs that
11534 themselves contain DW_AT_specification attributes. */
11535 spec_die
= die_specification (spec_die
, &spec_cu
);
11539 newobj
= pop_context ();
11540 /* Make a block for the local symbols within. */
11541 block
= finish_block (newobj
->name
, &local_symbols
, newobj
->old_blocks
,
11542 newobj
->static_link
, lowpc
, highpc
);
11544 /* For C++, set the block's scope. */
11545 if ((cu
->language
== language_cplus
11546 || cu
->language
== language_fortran
11547 || cu
->language
== language_d
11548 || cu
->language
== language_rust
)
11549 && cu
->processing_has_namespace_info
)
11550 block_set_scope (block
, determine_prefix (die
, cu
),
11551 &objfile
->objfile_obstack
);
11553 /* If we have address ranges, record them. */
11554 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11556 gdbarch_make_symbol_special (gdbarch
, newobj
->name
, objfile
);
11558 /* Attach template arguments to function. */
11559 if (! VEC_empty (symbolp
, template_args
))
11561 gdb_assert (templ_func
!= NULL
);
11563 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
11564 templ_func
->template_arguments
11565 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
11566 templ_func
->n_template_arguments
);
11567 memcpy (templ_func
->template_arguments
,
11568 VEC_address (symbolp
, template_args
),
11569 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
11570 VEC_free (symbolp
, template_args
);
11573 /* In C++, we can have functions nested inside functions (e.g., when
11574 a function declares a class that has methods). This means that
11575 when we finish processing a function scope, we may need to go
11576 back to building a containing block's symbol lists. */
11577 local_symbols
= newobj
->locals
;
11578 local_using_directives
= newobj
->local_using_directives
;
11580 /* If we've finished processing a top-level function, subsequent
11581 symbols go in the file symbol list. */
11582 if (outermost_context_p ())
11583 cu
->list_in_scope
= &file_symbols
;
11586 /* Process all the DIES contained within a lexical block scope. Start
11587 a new scope, process the dies, and then close the scope. */
11590 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11592 struct objfile
*objfile
= cu
->objfile
;
11593 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11594 struct context_stack
*newobj
;
11595 CORE_ADDR lowpc
, highpc
;
11596 struct die_info
*child_die
;
11597 CORE_ADDR baseaddr
;
11599 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11601 /* Ignore blocks with missing or invalid low and high pc attributes. */
11602 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
11603 as multiple lexical blocks? Handling children in a sane way would
11604 be nasty. Might be easier to properly extend generic blocks to
11605 describe ranges. */
11606 switch (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
11608 case PC_BOUNDS_NOT_PRESENT
:
11609 /* DW_TAG_lexical_block has no attributes, process its children as if
11610 there was no wrapping by that DW_TAG_lexical_block.
11611 GCC does no longer produces such DWARF since GCC r224161. */
11612 for (child_die
= die
->child
;
11613 child_die
!= NULL
&& child_die
->tag
;
11614 child_die
= sibling_die (child_die
))
11615 process_die (child_die
, cu
);
11617 case PC_BOUNDS_INVALID
:
11620 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11621 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
11623 push_context (0, lowpc
);
11624 if (die
->child
!= NULL
)
11626 child_die
= die
->child
;
11627 while (child_die
&& child_die
->tag
)
11629 process_die (child_die
, cu
);
11630 child_die
= sibling_die (child_die
);
11633 inherit_abstract_dies (die
, cu
);
11634 newobj
= pop_context ();
11636 if (local_symbols
!= NULL
|| local_using_directives
!= NULL
)
11638 struct block
*block
11639 = finish_block (0, &local_symbols
, newobj
->old_blocks
, NULL
,
11640 newobj
->start_addr
, highpc
);
11642 /* Note that recording ranges after traversing children, as we
11643 do here, means that recording a parent's ranges entails
11644 walking across all its children's ranges as they appear in
11645 the address map, which is quadratic behavior.
11647 It would be nicer to record the parent's ranges before
11648 traversing its children, simply overriding whatever you find
11649 there. But since we don't even decide whether to create a
11650 block until after we've traversed its children, that's hard
11652 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11654 local_symbols
= newobj
->locals
;
11655 local_using_directives
= newobj
->local_using_directives
;
11658 /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */
11661 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11663 struct objfile
*objfile
= cu
->objfile
;
11664 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11665 CORE_ADDR pc
, baseaddr
;
11666 struct attribute
*attr
;
11667 struct call_site
*call_site
, call_site_local
;
11670 struct die_info
*child_die
;
11672 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11674 attr
= dwarf2_attr (die
, DW_AT_call_return_pc
, cu
);
11677 /* This was a pre-DWARF-5 GNU extension alias
11678 for DW_AT_call_return_pc. */
11679 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
11683 complaint (&symfile_complaints
,
11684 _("missing DW_AT_call_return_pc for DW_TAG_call_site "
11685 "DIE 0x%x [in module %s]"),
11686 die
->offset
.sect_off
, objfile_name (objfile
));
11689 pc
= attr_value_as_address (attr
) + baseaddr
;
11690 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
11692 if (cu
->call_site_htab
== NULL
)
11693 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
11694 NULL
, &objfile
->objfile_obstack
,
11695 hashtab_obstack_allocate
, NULL
);
11696 call_site_local
.pc
= pc
;
11697 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
11700 complaint (&symfile_complaints
,
11701 _("Duplicate PC %s for DW_TAG_call_site "
11702 "DIE 0x%x [in module %s]"),
11703 paddress (gdbarch
, pc
), die
->offset
.sect_off
,
11704 objfile_name (objfile
));
11708 /* Count parameters at the caller. */
11711 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
11712 child_die
= sibling_die (child_die
))
11714 if (child_die
->tag
!= DW_TAG_call_site_parameter
11715 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11717 complaint (&symfile_complaints
,
11718 _("Tag %d is not DW_TAG_call_site_parameter in "
11719 "DW_TAG_call_site child DIE 0x%x [in module %s]"),
11720 child_die
->tag
, child_die
->offset
.sect_off
,
11721 objfile_name (objfile
));
11729 = ((struct call_site
*)
11730 obstack_alloc (&objfile
->objfile_obstack
,
11731 sizeof (*call_site
)
11732 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
11734 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
11735 call_site
->pc
= pc
;
11737 if (dwarf2_flag_true_p (die
, DW_AT_call_tail_call
, cu
)
11738 || dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
11740 struct die_info
*func_die
;
11742 /* Skip also over DW_TAG_inlined_subroutine. */
11743 for (func_die
= die
->parent
;
11744 func_die
&& func_die
->tag
!= DW_TAG_subprogram
11745 && func_die
->tag
!= DW_TAG_subroutine_type
;
11746 func_die
= func_die
->parent
);
11748 /* DW_AT_call_all_calls is a superset
11749 of DW_AT_call_all_tail_calls. */
11751 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_calls
, cu
)
11752 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
11753 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_tail_calls
, cu
)
11754 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
11756 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
11757 not complete. But keep CALL_SITE for look ups via call_site_htab,
11758 both the initial caller containing the real return address PC and
11759 the final callee containing the current PC of a chain of tail
11760 calls do not need to have the tail call list complete. But any
11761 function candidate for a virtual tail call frame searched via
11762 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
11763 determined unambiguously. */
11767 struct type
*func_type
= NULL
;
11770 func_type
= get_die_type (func_die
, cu
);
11771 if (func_type
!= NULL
)
11773 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
11775 /* Enlist this call site to the function. */
11776 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
11777 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
11780 complaint (&symfile_complaints
,
11781 _("Cannot find function owning DW_TAG_call_site "
11782 "DIE 0x%x [in module %s]"),
11783 die
->offset
.sect_off
, objfile_name (objfile
));
11787 attr
= dwarf2_attr (die
, DW_AT_call_target
, cu
);
11789 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
11791 attr
= dwarf2_attr (die
, DW_AT_call_origin
, cu
);
11794 /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */
11795 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
11797 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
11798 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
11799 /* Keep NULL DWARF_BLOCK. */;
11800 else if (attr_form_is_block (attr
))
11802 struct dwarf2_locexpr_baton
*dlbaton
;
11804 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
11805 dlbaton
->data
= DW_BLOCK (attr
)->data
;
11806 dlbaton
->size
= DW_BLOCK (attr
)->size
;
11807 dlbaton
->per_cu
= cu
->per_cu
;
11809 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
11811 else if (attr_form_is_ref (attr
))
11813 struct dwarf2_cu
*target_cu
= cu
;
11814 struct die_info
*target_die
;
11816 target_die
= follow_die_ref (die
, attr
, &target_cu
);
11817 gdb_assert (target_cu
->objfile
== objfile
);
11818 if (die_is_declaration (target_die
, target_cu
))
11820 const char *target_physname
;
11822 /* Prefer the mangled name; otherwise compute the demangled one. */
11823 target_physname
= dwarf2_string_attr (target_die
,
11824 DW_AT_linkage_name
,
11826 if (target_physname
== NULL
)
11827 target_physname
= dwarf2_string_attr (target_die
,
11828 DW_AT_MIPS_linkage_name
,
11830 if (target_physname
== NULL
)
11831 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
11832 if (target_physname
== NULL
)
11833 complaint (&symfile_complaints
,
11834 _("DW_AT_call_target target DIE has invalid "
11835 "physname, for referencing DIE 0x%x [in module %s]"),
11836 die
->offset
.sect_off
, objfile_name (objfile
));
11838 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
11844 /* DW_AT_entry_pc should be preferred. */
11845 if (dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
)
11846 <= PC_BOUNDS_INVALID
)
11847 complaint (&symfile_complaints
,
11848 _("DW_AT_call_target target DIE has invalid "
11849 "low pc, for referencing DIE 0x%x [in module %s]"),
11850 die
->offset
.sect_off
, objfile_name (objfile
));
11853 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11854 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
11859 complaint (&symfile_complaints
,
11860 _("DW_TAG_call_site DW_AT_call_target is neither "
11861 "block nor reference, for DIE 0x%x [in module %s]"),
11862 die
->offset
.sect_off
, objfile_name (objfile
));
11864 call_site
->per_cu
= cu
->per_cu
;
11866 for (child_die
= die
->child
;
11867 child_die
&& child_die
->tag
;
11868 child_die
= sibling_die (child_die
))
11870 struct call_site_parameter
*parameter
;
11871 struct attribute
*loc
, *origin
;
11873 if (child_die
->tag
!= DW_TAG_call_site_parameter
11874 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11876 /* Already printed the complaint above. */
11880 gdb_assert (call_site
->parameter_count
< nparams
);
11881 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
11883 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
11884 specifies DW_TAG_formal_parameter. Value of the data assumed for the
11885 register is contained in DW_AT_call_value. */
11887 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
11888 origin
= dwarf2_attr (child_die
, DW_AT_call_parameter
, cu
);
11889 if (origin
== NULL
)
11891 /* This was a pre-DWARF-5 GNU extension alias
11892 for DW_AT_call_parameter. */
11893 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
11895 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
11897 sect_offset offset
;
11899 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
11900 offset
= dwarf2_get_ref_die_offset (origin
);
11901 if (!offset_in_cu_p (&cu
->header
, offset
))
11903 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
11904 binding can be done only inside one CU. Such referenced DIE
11905 therefore cannot be even moved to DW_TAG_partial_unit. */
11906 complaint (&symfile_complaints
,
11907 _("DW_AT_call_parameter offset is not in CU for "
11908 "DW_TAG_call_site child DIE 0x%x [in module %s]"),
11909 child_die
->offset
.sect_off
, objfile_name (objfile
));
11912 parameter
->u
.param_offset
.cu_off
= (offset
.sect_off
11913 - cu
->header
.offset
.sect_off
);
11915 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
11917 complaint (&symfile_complaints
,
11918 _("No DW_FORM_block* DW_AT_location for "
11919 "DW_TAG_call_site child DIE 0x%x [in module %s]"),
11920 child_die
->offset
.sect_off
, objfile_name (objfile
));
11925 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
11926 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
11927 if (parameter
->u
.dwarf_reg
!= -1)
11928 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
11929 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
11930 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
11931 ¶meter
->u
.fb_offset
))
11932 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
11935 complaint (&symfile_complaints
,
11936 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
11937 "for DW_FORM_block* DW_AT_location is supported for "
11938 "DW_TAG_call_site child DIE 0x%x "
11940 child_die
->offset
.sect_off
, objfile_name (objfile
));
11945 attr
= dwarf2_attr (child_die
, DW_AT_call_value
, cu
);
11947 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
11948 if (!attr_form_is_block (attr
))
11950 complaint (&symfile_complaints
,
11951 _("No DW_FORM_block* DW_AT_call_value for "
11952 "DW_TAG_call_site child DIE 0x%x [in module %s]"),
11953 child_die
->offset
.sect_off
, objfile_name (objfile
));
11956 parameter
->value
= DW_BLOCK (attr
)->data
;
11957 parameter
->value_size
= DW_BLOCK (attr
)->size
;
11959 /* Parameters are not pre-cleared by memset above. */
11960 parameter
->data_value
= NULL
;
11961 parameter
->data_value_size
= 0;
11962 call_site
->parameter_count
++;
11964 attr
= dwarf2_attr (child_die
, DW_AT_call_data_value
, cu
);
11966 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
11969 if (!attr_form_is_block (attr
))
11970 complaint (&symfile_complaints
,
11971 _("No DW_FORM_block* DW_AT_call_data_value for "
11972 "DW_TAG_call_site child DIE 0x%x [in module %s]"),
11973 child_die
->offset
.sect_off
, objfile_name (objfile
));
11976 parameter
->data_value
= DW_BLOCK (attr
)->data
;
11977 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
11983 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET
11984 reading .debug_rnglists.
11985 Callback's type should be:
11986 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
11987 Return true if the attributes are present and valid, otherwise,
11990 template <typename Callback
>
11992 dwarf2_rnglists_process (unsigned offset
, struct dwarf2_cu
*cu
,
11993 Callback
&&callback
)
11995 struct objfile
*objfile
= cu
->objfile
;
11996 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11997 struct comp_unit_head
*cu_header
= &cu
->header
;
11998 bfd
*obfd
= objfile
->obfd
;
11999 unsigned int addr_size
= cu_header
->addr_size
;
12000 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
12001 /* Base address selection entry. */
12004 unsigned int dummy
;
12005 const gdb_byte
*buffer
;
12007 CORE_ADDR high
= 0;
12008 CORE_ADDR baseaddr
;
12009 bool overflow
= false;
12011 found_base
= cu
->base_known
;
12012 base
= cu
->base_address
;
12014 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->rnglists
);
12015 if (offset
>= dwarf2_per_objfile
->rnglists
.size
)
12017 complaint (&symfile_complaints
,
12018 _("Offset %d out of bounds for DW_AT_ranges attribute"),
12022 buffer
= dwarf2_per_objfile
->rnglists
.buffer
+ offset
;
12024 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
12028 CORE_ADDR range_beginning
, range_end
;
12029 const gdb_byte
*buf_end
= (dwarf2_per_objfile
->rnglists
.buffer
12030 + dwarf2_per_objfile
->rnglists
.size
);
12031 unsigned int bytes_read
;
12033 if (buffer
== buf_end
)
12038 const auto rlet
= static_cast<enum dwarf_range_list_entry
>(*buffer
++);
12041 case DW_RLE_end_of_list
:
12043 case DW_RLE_base_address
:
12044 if (buffer
+ cu
->header
.addr_size
> buf_end
)
12049 base
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12051 buffer
+= bytes_read
;
12053 case DW_RLE_start_length
:
12054 if (buffer
+ cu
->header
.addr_size
> buf_end
)
12059 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12060 buffer
+= bytes_read
;
12061 range_end
= (range_beginning
12062 + read_unsigned_leb128 (obfd
, buffer
, &bytes_read
));
12063 buffer
+= bytes_read
;
12064 if (buffer
> buf_end
)
12070 case DW_RLE_offset_pair
:
12071 range_beginning
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
12072 buffer
+= bytes_read
;
12073 if (buffer
> buf_end
)
12078 range_end
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
12079 buffer
+= bytes_read
;
12080 if (buffer
> buf_end
)
12086 case DW_RLE_start_end
:
12087 if (buffer
+ 2 * cu
->header
.addr_size
> buf_end
)
12092 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12093 buffer
+= bytes_read
;
12094 range_end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12095 buffer
+= bytes_read
;
12098 complaint (&symfile_complaints
,
12099 _("Invalid .debug_rnglists data (no base address)"));
12102 if (rlet
== DW_RLE_end_of_list
|| overflow
)
12104 if (rlet
== DW_RLE_base_address
)
12109 /* We have no valid base address for the ranges
12111 complaint (&symfile_complaints
,
12112 _("Invalid .debug_rnglists data (no base address)"));
12116 if (range_beginning
> range_end
)
12118 /* Inverted range entries are invalid. */
12119 complaint (&symfile_complaints
,
12120 _("Invalid .debug_rnglists data (inverted range)"));
12124 /* Empty range entries have no effect. */
12125 if (range_beginning
== range_end
)
12128 range_beginning
+= base
;
12131 /* A not-uncommon case of bad debug info.
12132 Don't pollute the addrmap with bad data. */
12133 if (range_beginning
+ baseaddr
== 0
12134 && !dwarf2_per_objfile
->has_section_at_zero
)
12136 complaint (&symfile_complaints
,
12137 _(".debug_rnglists entry has start address of zero"
12138 " [in module %s]"), objfile_name (objfile
));
12142 callback (range_beginning
, range_end
);
12147 complaint (&symfile_complaints
,
12148 _("Offset %d is not terminated "
12149 "for DW_AT_ranges attribute"),
12157 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges.
12158 Callback's type should be:
12159 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
12160 Return 1 if the attributes are present and valid, otherwise, return 0. */
12162 template <typename Callback
>
12164 dwarf2_ranges_process (unsigned offset
, struct dwarf2_cu
*cu
,
12165 Callback
&&callback
)
12167 struct objfile
*objfile
= cu
->objfile
;
12168 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12169 struct comp_unit_head
*cu_header
= &cu
->header
;
12170 bfd
*obfd
= objfile
->obfd
;
12171 unsigned int addr_size
= cu_header
->addr_size
;
12172 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
12173 /* Base address selection entry. */
12176 unsigned int dummy
;
12177 const gdb_byte
*buffer
;
12178 CORE_ADDR baseaddr
;
12180 if (cu_header
->version
>= 5)
12181 return dwarf2_rnglists_process (offset
, cu
, callback
);
12183 found_base
= cu
->base_known
;
12184 base
= cu
->base_address
;
12186 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
12187 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
12189 complaint (&symfile_complaints
,
12190 _("Offset %d out of bounds for DW_AT_ranges attribute"),
12194 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
12196 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
12200 CORE_ADDR range_beginning
, range_end
;
12202 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
12203 buffer
+= addr_size
;
12204 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
12205 buffer
+= addr_size
;
12206 offset
+= 2 * addr_size
;
12208 /* An end of list marker is a pair of zero addresses. */
12209 if (range_beginning
== 0 && range_end
== 0)
12210 /* Found the end of list entry. */
12213 /* Each base address selection entry is a pair of 2 values.
12214 The first is the largest possible address, the second is
12215 the base address. Check for a base address here. */
12216 if ((range_beginning
& mask
) == mask
)
12218 /* If we found the largest possible address, then we already
12219 have the base address in range_end. */
12227 /* We have no valid base address for the ranges
12229 complaint (&symfile_complaints
,
12230 _("Invalid .debug_ranges data (no base address)"));
12234 if (range_beginning
> range_end
)
12236 /* Inverted range entries are invalid. */
12237 complaint (&symfile_complaints
,
12238 _("Invalid .debug_ranges data (inverted range)"));
12242 /* Empty range entries have no effect. */
12243 if (range_beginning
== range_end
)
12246 range_beginning
+= base
;
12249 /* A not-uncommon case of bad debug info.
12250 Don't pollute the addrmap with bad data. */
12251 if (range_beginning
+ baseaddr
== 0
12252 && !dwarf2_per_objfile
->has_section_at_zero
)
12254 complaint (&symfile_complaints
,
12255 _(".debug_ranges entry has start address of zero"
12256 " [in module %s]"), objfile_name (objfile
));
12260 callback (range_beginning
, range_end
);
12266 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
12267 Return 1 if the attributes are present and valid, otherwise, return 0.
12268 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
12271 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
12272 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
12273 struct partial_symtab
*ranges_pst
)
12275 struct objfile
*objfile
= cu
->objfile
;
12276 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12277 const CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
12278 SECT_OFF_TEXT (objfile
));
12281 CORE_ADDR high
= 0;
12284 retval
= dwarf2_ranges_process (offset
, cu
,
12285 [&] (CORE_ADDR range_beginning
, CORE_ADDR range_end
)
12287 if (ranges_pst
!= NULL
)
12292 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
12293 range_beginning
+ baseaddr
);
12294 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
12295 range_end
+ baseaddr
);
12296 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
12300 /* FIXME: This is recording everything as a low-high
12301 segment of consecutive addresses. We should have a
12302 data structure for discontiguous block ranges
12306 low
= range_beginning
;
12312 if (range_beginning
< low
)
12313 low
= range_beginning
;
12314 if (range_end
> high
)
12322 /* If the first entry is an end-of-list marker, the range
12323 describes an empty scope, i.e. no instructions. */
12329 *high_return
= high
;
12333 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
12334 definition for the return value. *LOWPC and *HIGHPC are set iff
12335 neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */
12337 static enum pc_bounds_kind
12338 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
12339 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
12340 struct partial_symtab
*pst
)
12342 struct attribute
*attr
;
12343 struct attribute
*attr_high
;
12345 CORE_ADDR high
= 0;
12346 enum pc_bounds_kind ret
;
12348 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
12351 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
12354 low
= attr_value_as_address (attr
);
12355 high
= attr_value_as_address (attr_high
);
12356 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
12360 /* Found high w/o low attribute. */
12361 return PC_BOUNDS_INVALID
;
12363 /* Found consecutive range of addresses. */
12364 ret
= PC_BOUNDS_HIGH_LOW
;
12368 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
12371 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
12372 We take advantage of the fact that DW_AT_ranges does not appear
12373 in DW_TAG_compile_unit of DWO files. */
12374 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
12375 unsigned int ranges_offset
= (DW_UNSND (attr
)
12376 + (need_ranges_base
12380 /* Value of the DW_AT_ranges attribute is the offset in the
12381 .debug_ranges section. */
12382 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
12383 return PC_BOUNDS_INVALID
;
12384 /* Found discontinuous range of addresses. */
12385 ret
= PC_BOUNDS_RANGES
;
12388 return PC_BOUNDS_NOT_PRESENT
;
12391 /* read_partial_die has also the strict LOW < HIGH requirement. */
12393 return PC_BOUNDS_INVALID
;
12395 /* When using the GNU linker, .gnu.linkonce. sections are used to
12396 eliminate duplicate copies of functions and vtables and such.
12397 The linker will arbitrarily choose one and discard the others.
12398 The AT_*_pc values for such functions refer to local labels in
12399 these sections. If the section from that file was discarded, the
12400 labels are not in the output, so the relocs get a value of 0.
12401 If this is a discarded function, mark the pc bounds as invalid,
12402 so that GDB will ignore it. */
12403 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12404 return PC_BOUNDS_INVALID
;
12412 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
12413 its low and high PC addresses. Do nothing if these addresses could not
12414 be determined. Otherwise, set LOWPC to the low address if it is smaller,
12415 and HIGHPC to the high address if greater than HIGHPC. */
12418 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
12419 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
12420 struct dwarf2_cu
*cu
)
12422 CORE_ADDR low
, high
;
12423 struct die_info
*child
= die
->child
;
12425 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
) >= PC_BOUNDS_RANGES
)
12427 *lowpc
= std::min (*lowpc
, low
);
12428 *highpc
= std::max (*highpc
, high
);
12431 /* If the language does not allow nested subprograms (either inside
12432 subprograms or lexical blocks), we're done. */
12433 if (cu
->language
!= language_ada
)
12436 /* Check all the children of the given DIE. If it contains nested
12437 subprograms, then check their pc bounds. Likewise, we need to
12438 check lexical blocks as well, as they may also contain subprogram
12440 while (child
&& child
->tag
)
12442 if (child
->tag
== DW_TAG_subprogram
12443 || child
->tag
== DW_TAG_lexical_block
)
12444 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
12445 child
= sibling_die (child
);
12449 /* Get the low and high pc's represented by the scope DIE, and store
12450 them in *LOWPC and *HIGHPC. If the correct values can't be
12451 determined, set *LOWPC to -1 and *HIGHPC to 0. */
12454 get_scope_pc_bounds (struct die_info
*die
,
12455 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
12456 struct dwarf2_cu
*cu
)
12458 CORE_ADDR best_low
= (CORE_ADDR
) -1;
12459 CORE_ADDR best_high
= (CORE_ADDR
) 0;
12460 CORE_ADDR current_low
, current_high
;
12462 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
12463 >= PC_BOUNDS_RANGES
)
12465 best_low
= current_low
;
12466 best_high
= current_high
;
12470 struct die_info
*child
= die
->child
;
12472 while (child
&& child
->tag
)
12474 switch (child
->tag
) {
12475 case DW_TAG_subprogram
:
12476 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
12478 case DW_TAG_namespace
:
12479 case DW_TAG_module
:
12480 /* FIXME: carlton/2004-01-16: Should we do this for
12481 DW_TAG_class_type/DW_TAG_structure_type, too? I think
12482 that current GCC's always emit the DIEs corresponding
12483 to definitions of methods of classes as children of a
12484 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
12485 the DIEs giving the declarations, which could be
12486 anywhere). But I don't see any reason why the
12487 standards says that they have to be there. */
12488 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
12490 if (current_low
!= ((CORE_ADDR
) -1))
12492 best_low
= std::min (best_low
, current_low
);
12493 best_high
= std::max (best_high
, current_high
);
12501 child
= sibling_die (child
);
12506 *highpc
= best_high
;
12509 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
12513 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
12514 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
12516 struct objfile
*objfile
= cu
->objfile
;
12517 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12518 struct attribute
*attr
;
12519 struct attribute
*attr_high
;
12521 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
12524 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
12527 CORE_ADDR low
= attr_value_as_address (attr
);
12528 CORE_ADDR high
= attr_value_as_address (attr_high
);
12530 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
12533 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
12534 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
12535 record_block_range (block
, low
, high
- 1);
12539 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
12542 bfd
*obfd
= objfile
->obfd
;
12543 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
12544 We take advantage of the fact that DW_AT_ranges does not appear
12545 in DW_TAG_compile_unit of DWO files. */
12546 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
12548 /* The value of the DW_AT_ranges attribute is the offset of the
12549 address range list in the .debug_ranges section. */
12550 unsigned long offset
= (DW_UNSND (attr
)
12551 + (need_ranges_base
? cu
->ranges_base
: 0));
12552 const gdb_byte
*buffer
;
12554 /* For some target architectures, but not others, the
12555 read_address function sign-extends the addresses it returns.
12556 To recognize base address selection entries, we need a
12558 unsigned int addr_size
= cu
->header
.addr_size
;
12559 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
12561 /* The base address, to which the next pair is relative. Note
12562 that this 'base' is a DWARF concept: most entries in a range
12563 list are relative, to reduce the number of relocs against the
12564 debugging information. This is separate from this function's
12565 'baseaddr' argument, which GDB uses to relocate debugging
12566 information from a shared library based on the address at
12567 which the library was loaded. */
12568 CORE_ADDR base
= cu
->base_address
;
12569 int base_known
= cu
->base_known
;
12571 dwarf2_ranges_process (offset
, cu
,
12572 [&] (CORE_ADDR start
, CORE_ADDR end
)
12574 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
12575 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
12576 record_block_range (block
, start
, end
- 1);
12581 /* Check whether the producer field indicates either of GCC < 4.6, or the
12582 Intel C/C++ compiler, and cache the result in CU. */
12585 check_producer (struct dwarf2_cu
*cu
)
12589 if (cu
->producer
== NULL
)
12591 /* For unknown compilers expect their behavior is DWARF version
12594 GCC started to support .debug_types sections by -gdwarf-4 since
12595 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
12596 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
12597 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
12598 interpreted incorrectly by GDB now - GCC PR debug/48229. */
12600 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
12602 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
12603 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
12605 else if (startswith (cu
->producer
, "Intel(R) C"))
12606 cu
->producer_is_icc
= 1;
12609 /* For other non-GCC compilers, expect their behavior is DWARF version
12613 cu
->checked_producer
= 1;
12616 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
12617 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
12618 during 4.6.0 experimental. */
12621 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
12623 if (!cu
->checked_producer
)
12624 check_producer (cu
);
12626 return cu
->producer_is_gxx_lt_4_6
;
12629 /* Return the default accessibility type if it is not overriden by
12630 DW_AT_accessibility. */
12632 static enum dwarf_access_attribute
12633 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
12635 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
12637 /* The default DWARF 2 accessibility for members is public, the default
12638 accessibility for inheritance is private. */
12640 if (die
->tag
!= DW_TAG_inheritance
)
12641 return DW_ACCESS_public
;
12643 return DW_ACCESS_private
;
12647 /* DWARF 3+ defines the default accessibility a different way. The same
12648 rules apply now for DW_TAG_inheritance as for the members and it only
12649 depends on the container kind. */
12651 if (die
->parent
->tag
== DW_TAG_class_type
)
12652 return DW_ACCESS_private
;
12654 return DW_ACCESS_public
;
12658 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
12659 offset. If the attribute was not found return 0, otherwise return
12660 1. If it was found but could not properly be handled, set *OFFSET
12664 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
12667 struct attribute
*attr
;
12669 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
12674 /* Note that we do not check for a section offset first here.
12675 This is because DW_AT_data_member_location is new in DWARF 4,
12676 so if we see it, we can assume that a constant form is really
12677 a constant and not a section offset. */
12678 if (attr_form_is_constant (attr
))
12679 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
12680 else if (attr_form_is_section_offset (attr
))
12681 dwarf2_complex_location_expr_complaint ();
12682 else if (attr_form_is_block (attr
))
12683 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12685 dwarf2_complex_location_expr_complaint ();
12693 /* Add an aggregate field to the field list. */
12696 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
12697 struct dwarf2_cu
*cu
)
12699 struct objfile
*objfile
= cu
->objfile
;
12700 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12701 struct nextfield
*new_field
;
12702 struct attribute
*attr
;
12704 const char *fieldname
= "";
12706 /* Allocate a new field list entry and link it in. */
12707 new_field
= XNEW (struct nextfield
);
12708 make_cleanup (xfree
, new_field
);
12709 memset (new_field
, 0, sizeof (struct nextfield
));
12711 if (die
->tag
== DW_TAG_inheritance
)
12713 new_field
->next
= fip
->baseclasses
;
12714 fip
->baseclasses
= new_field
;
12718 new_field
->next
= fip
->fields
;
12719 fip
->fields
= new_field
;
12723 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
12725 new_field
->accessibility
= DW_UNSND (attr
);
12727 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
12728 if (new_field
->accessibility
!= DW_ACCESS_public
)
12729 fip
->non_public_fields
= 1;
12731 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
12733 new_field
->virtuality
= DW_UNSND (attr
);
12735 new_field
->virtuality
= DW_VIRTUALITY_none
;
12737 fp
= &new_field
->field
;
12739 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
12743 /* Data member other than a C++ static data member. */
12745 /* Get type of field. */
12746 fp
->type
= die_type (die
, cu
);
12748 SET_FIELD_BITPOS (*fp
, 0);
12750 /* Get bit size of field (zero if none). */
12751 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
12754 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
12758 FIELD_BITSIZE (*fp
) = 0;
12761 /* Get bit offset of field. */
12762 if (handle_data_member_location (die
, cu
, &offset
))
12763 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
12764 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
12767 if (gdbarch_bits_big_endian (gdbarch
))
12769 /* For big endian bits, the DW_AT_bit_offset gives the
12770 additional bit offset from the MSB of the containing
12771 anonymous object to the MSB of the field. We don't
12772 have to do anything special since we don't need to
12773 know the size of the anonymous object. */
12774 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
12778 /* For little endian bits, compute the bit offset to the
12779 MSB of the anonymous object, subtract off the number of
12780 bits from the MSB of the field to the MSB of the
12781 object, and then subtract off the number of bits of
12782 the field itself. The result is the bit offset of
12783 the LSB of the field. */
12784 int anonymous_size
;
12785 int bit_offset
= DW_UNSND (attr
);
12787 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12790 /* The size of the anonymous object containing
12791 the bit field is explicit, so use the
12792 indicated size (in bytes). */
12793 anonymous_size
= DW_UNSND (attr
);
12797 /* The size of the anonymous object containing
12798 the bit field must be inferred from the type
12799 attribute of the data member containing the
12801 anonymous_size
= TYPE_LENGTH (fp
->type
);
12803 SET_FIELD_BITPOS (*fp
,
12804 (FIELD_BITPOS (*fp
)
12805 + anonymous_size
* bits_per_byte
12806 - bit_offset
- FIELD_BITSIZE (*fp
)));
12809 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
12811 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
12812 + dwarf2_get_attr_constant_value (attr
, 0)));
12814 /* Get name of field. */
12815 fieldname
= dwarf2_name (die
, cu
);
12816 if (fieldname
== NULL
)
12819 /* The name is already allocated along with this objfile, so we don't
12820 need to duplicate it for the type. */
12821 fp
->name
= fieldname
;
12823 /* Change accessibility for artificial fields (e.g. virtual table
12824 pointer or virtual base class pointer) to private. */
12825 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
12827 FIELD_ARTIFICIAL (*fp
) = 1;
12828 new_field
->accessibility
= DW_ACCESS_private
;
12829 fip
->non_public_fields
= 1;
12832 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
12834 /* C++ static member. */
12836 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
12837 is a declaration, but all versions of G++ as of this writing
12838 (so through at least 3.2.1) incorrectly generate
12839 DW_TAG_variable tags. */
12841 const char *physname
;
12843 /* Get name of field. */
12844 fieldname
= dwarf2_name (die
, cu
);
12845 if (fieldname
== NULL
)
12848 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
12850 /* Only create a symbol if this is an external value.
12851 new_symbol checks this and puts the value in the global symbol
12852 table, which we want. If it is not external, new_symbol
12853 will try to put the value in cu->list_in_scope which is wrong. */
12854 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
12856 /* A static const member, not much different than an enum as far as
12857 we're concerned, except that we can support more types. */
12858 new_symbol (die
, NULL
, cu
);
12861 /* Get physical name. */
12862 physname
= dwarf2_physname (fieldname
, die
, cu
);
12864 /* The name is already allocated along with this objfile, so we don't
12865 need to duplicate it for the type. */
12866 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
12867 FIELD_TYPE (*fp
) = die_type (die
, cu
);
12868 FIELD_NAME (*fp
) = fieldname
;
12870 else if (die
->tag
== DW_TAG_inheritance
)
12874 /* C++ base class field. */
12875 if (handle_data_member_location (die
, cu
, &offset
))
12876 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
12877 FIELD_BITSIZE (*fp
) = 0;
12878 FIELD_TYPE (*fp
) = die_type (die
, cu
);
12879 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
12880 fip
->nbaseclasses
++;
12884 /* Add a typedef defined in the scope of the FIP's class. */
12887 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
12888 struct dwarf2_cu
*cu
)
12890 struct typedef_field_list
*new_field
;
12891 struct typedef_field
*fp
;
12893 /* Allocate a new field list entry and link it in. */
12894 new_field
= XCNEW (struct typedef_field_list
);
12895 make_cleanup (xfree
, new_field
);
12897 gdb_assert (die
->tag
== DW_TAG_typedef
);
12899 fp
= &new_field
->field
;
12901 /* Get name of field. */
12902 fp
->name
= dwarf2_name (die
, cu
);
12903 if (fp
->name
== NULL
)
12906 fp
->type
= read_type_die (die
, cu
);
12908 new_field
->next
= fip
->typedef_field_list
;
12909 fip
->typedef_field_list
= new_field
;
12910 fip
->typedef_field_list_count
++;
12913 /* Create the vector of fields, and attach it to the type. */
12916 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
12917 struct dwarf2_cu
*cu
)
12919 int nfields
= fip
->nfields
;
12921 /* Record the field count, allocate space for the array of fields,
12922 and create blank accessibility bitfields if necessary. */
12923 TYPE_NFIELDS (type
) = nfields
;
12924 TYPE_FIELDS (type
) = (struct field
*)
12925 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
12926 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
12928 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
12930 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12932 TYPE_FIELD_PRIVATE_BITS (type
) =
12933 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12934 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
12936 TYPE_FIELD_PROTECTED_BITS (type
) =
12937 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12938 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
12940 TYPE_FIELD_IGNORE_BITS (type
) =
12941 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12942 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
12945 /* If the type has baseclasses, allocate and clear a bit vector for
12946 TYPE_FIELD_VIRTUAL_BITS. */
12947 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
12949 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
12950 unsigned char *pointer
;
12952 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12953 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
12954 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
12955 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
12956 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
12959 /* Copy the saved-up fields into the field vector. Start from the head of
12960 the list, adding to the tail of the field array, so that they end up in
12961 the same order in the array in which they were added to the list. */
12962 while (nfields
-- > 0)
12964 struct nextfield
*fieldp
;
12968 fieldp
= fip
->fields
;
12969 fip
->fields
= fieldp
->next
;
12973 fieldp
= fip
->baseclasses
;
12974 fip
->baseclasses
= fieldp
->next
;
12977 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
12978 switch (fieldp
->accessibility
)
12980 case DW_ACCESS_private
:
12981 if (cu
->language
!= language_ada
)
12982 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
12985 case DW_ACCESS_protected
:
12986 if (cu
->language
!= language_ada
)
12987 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
12990 case DW_ACCESS_public
:
12994 /* Unknown accessibility. Complain and treat it as public. */
12996 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
12997 fieldp
->accessibility
);
13001 if (nfields
< fip
->nbaseclasses
)
13003 switch (fieldp
->virtuality
)
13005 case DW_VIRTUALITY_virtual
:
13006 case DW_VIRTUALITY_pure_virtual
:
13007 if (cu
->language
== language_ada
)
13008 error (_("unexpected virtuality in component of Ada type"));
13009 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
13016 /* Return true if this member function is a constructor, false
13020 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
13022 const char *fieldname
;
13023 const char *type_name
;
13026 if (die
->parent
== NULL
)
13029 if (die
->parent
->tag
!= DW_TAG_structure_type
13030 && die
->parent
->tag
!= DW_TAG_union_type
13031 && die
->parent
->tag
!= DW_TAG_class_type
)
13034 fieldname
= dwarf2_name (die
, cu
);
13035 type_name
= dwarf2_name (die
->parent
, cu
);
13036 if (fieldname
== NULL
|| type_name
== NULL
)
13039 len
= strlen (fieldname
);
13040 return (strncmp (fieldname
, type_name
, len
) == 0
13041 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
13044 /* Add a member function to the proper fieldlist. */
13047 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
13048 struct type
*type
, struct dwarf2_cu
*cu
)
13050 struct objfile
*objfile
= cu
->objfile
;
13051 struct attribute
*attr
;
13052 struct fnfieldlist
*flp
;
13054 struct fn_field
*fnp
;
13055 const char *fieldname
;
13056 struct nextfnfield
*new_fnfield
;
13057 struct type
*this_type
;
13058 enum dwarf_access_attribute accessibility
;
13060 if (cu
->language
== language_ada
)
13061 error (_("unexpected member function in Ada type"));
13063 /* Get name of member function. */
13064 fieldname
= dwarf2_name (die
, cu
);
13065 if (fieldname
== NULL
)
13068 /* Look up member function name in fieldlist. */
13069 for (i
= 0; i
< fip
->nfnfields
; i
++)
13071 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
13075 /* Create new list element if necessary. */
13076 if (i
< fip
->nfnfields
)
13077 flp
= &fip
->fnfieldlists
[i
];
13080 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
13082 fip
->fnfieldlists
= (struct fnfieldlist
*)
13083 xrealloc (fip
->fnfieldlists
,
13084 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
13085 * sizeof (struct fnfieldlist
));
13086 if (fip
->nfnfields
== 0)
13087 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
13089 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
13090 flp
->name
= fieldname
;
13093 i
= fip
->nfnfields
++;
13096 /* Create a new member function field and chain it to the field list
13098 new_fnfield
= XNEW (struct nextfnfield
);
13099 make_cleanup (xfree
, new_fnfield
);
13100 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
13101 new_fnfield
->next
= flp
->head
;
13102 flp
->head
= new_fnfield
;
13105 /* Fill in the member function field info. */
13106 fnp
= &new_fnfield
->fnfield
;
13108 /* Delay processing of the physname until later. */
13109 if (cu
->language
== language_cplus
)
13111 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
13116 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
13117 fnp
->physname
= physname
? physname
: "";
13120 fnp
->type
= alloc_type (objfile
);
13121 this_type
= read_type_die (die
, cu
);
13122 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
13124 int nparams
= TYPE_NFIELDS (this_type
);
13126 /* TYPE is the domain of this method, and THIS_TYPE is the type
13127 of the method itself (TYPE_CODE_METHOD). */
13128 smash_to_method_type (fnp
->type
, type
,
13129 TYPE_TARGET_TYPE (this_type
),
13130 TYPE_FIELDS (this_type
),
13131 TYPE_NFIELDS (this_type
),
13132 TYPE_VARARGS (this_type
));
13134 /* Handle static member functions.
13135 Dwarf2 has no clean way to discern C++ static and non-static
13136 member functions. G++ helps GDB by marking the first
13137 parameter for non-static member functions (which is the this
13138 pointer) as artificial. We obtain this information from
13139 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
13140 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
13141 fnp
->voffset
= VOFFSET_STATIC
;
13144 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
13145 dwarf2_full_name (fieldname
, die
, cu
));
13147 /* Get fcontext from DW_AT_containing_type if present. */
13148 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
13149 fnp
->fcontext
= die_containing_type (die
, cu
);
13151 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
13152 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
13154 /* Get accessibility. */
13155 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
13157 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
13159 accessibility
= dwarf2_default_access_attribute (die
, cu
);
13160 switch (accessibility
)
13162 case DW_ACCESS_private
:
13163 fnp
->is_private
= 1;
13165 case DW_ACCESS_protected
:
13166 fnp
->is_protected
= 1;
13170 /* Check for artificial methods. */
13171 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
13172 if (attr
&& DW_UNSND (attr
) != 0)
13173 fnp
->is_artificial
= 1;
13175 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
13177 /* Get index in virtual function table if it is a virtual member
13178 function. For older versions of GCC, this is an offset in the
13179 appropriate virtual table, as specified by DW_AT_containing_type.
13180 For everyone else, it is an expression to be evaluated relative
13181 to the object address. */
13183 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
13186 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
13188 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
13190 /* Old-style GCC. */
13191 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
13193 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
13194 || (DW_BLOCK (attr
)->size
> 1
13195 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
13196 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
13198 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
13199 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
13200 dwarf2_complex_location_expr_complaint ();
13202 fnp
->voffset
/= cu
->header
.addr_size
;
13206 dwarf2_complex_location_expr_complaint ();
13208 if (!fnp
->fcontext
)
13210 /* If there is no `this' field and no DW_AT_containing_type,
13211 we cannot actually find a base class context for the
13213 if (TYPE_NFIELDS (this_type
) == 0
13214 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
13216 complaint (&symfile_complaints
,
13217 _("cannot determine context for virtual member "
13218 "function \"%s\" (offset %d)"),
13219 fieldname
, die
->offset
.sect_off
);
13224 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
13228 else if (attr_form_is_section_offset (attr
))
13230 dwarf2_complex_location_expr_complaint ();
13234 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
13240 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
13241 if (attr
&& DW_UNSND (attr
))
13243 /* GCC does this, as of 2008-08-25; PR debug/37237. */
13244 complaint (&symfile_complaints
,
13245 _("Member function \"%s\" (offset %d) is virtual "
13246 "but the vtable offset is not specified"),
13247 fieldname
, die
->offset
.sect_off
);
13248 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13249 TYPE_CPLUS_DYNAMIC (type
) = 1;
13254 /* Create the vector of member function fields, and attach it to the type. */
13257 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
13258 struct dwarf2_cu
*cu
)
13260 struct fnfieldlist
*flp
;
13263 if (cu
->language
== language_ada
)
13264 error (_("unexpected member functions in Ada type"));
13266 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13267 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
13268 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
13270 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
13272 struct nextfnfield
*nfp
= flp
->head
;
13273 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
13276 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
13277 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
13278 fn_flp
->fn_fields
= (struct fn_field
*)
13279 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
13280 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
13281 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
13284 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
13287 /* Returns non-zero if NAME is the name of a vtable member in CU's
13288 language, zero otherwise. */
13290 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
13292 static const char vptr
[] = "_vptr";
13293 static const char vtable
[] = "vtable";
13295 /* Look for the C++ form of the vtable. */
13296 if (startswith (name
, vptr
) && is_cplus_marker (name
[sizeof (vptr
) - 1]))
13302 /* GCC outputs unnamed structures that are really pointers to member
13303 functions, with the ABI-specified layout. If TYPE describes
13304 such a structure, smash it into a member function type.
13306 GCC shouldn't do this; it should just output pointer to member DIEs.
13307 This is GCC PR debug/28767. */
13310 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
13312 struct type
*pfn_type
, *self_type
, *new_type
;
13314 /* Check for a structure with no name and two children. */
13315 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
13318 /* Check for __pfn and __delta members. */
13319 if (TYPE_FIELD_NAME (type
, 0) == NULL
13320 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
13321 || TYPE_FIELD_NAME (type
, 1) == NULL
13322 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
13325 /* Find the type of the method. */
13326 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
13327 if (pfn_type
== NULL
13328 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
13329 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
13332 /* Look for the "this" argument. */
13333 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
13334 if (TYPE_NFIELDS (pfn_type
) == 0
13335 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
13336 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
13339 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
13340 new_type
= alloc_type (objfile
);
13341 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
13342 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
13343 TYPE_VARARGS (pfn_type
));
13344 smash_to_methodptr_type (type
, new_type
);
13347 /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler
13351 producer_is_icc (struct dwarf2_cu
*cu
)
13353 if (!cu
->checked_producer
)
13354 check_producer (cu
);
13356 return cu
->producer_is_icc
;
13359 /* Called when we find the DIE that starts a structure or union scope
13360 (definition) to create a type for the structure or union. Fill in
13361 the type's name and general properties; the members will not be
13362 processed until process_structure_scope. A symbol table entry for
13363 the type will also not be done until process_structure_scope (assuming
13364 the type has a name).
13366 NOTE: we need to call these functions regardless of whether or not the
13367 DIE has a DW_AT_name attribute, since it might be an anonymous
13368 structure or union. This gets the type entered into our set of
13369 user defined types. */
13371 static struct type
*
13372 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13374 struct objfile
*objfile
= cu
->objfile
;
13376 struct attribute
*attr
;
13379 /* If the definition of this type lives in .debug_types, read that type.
13380 Don't follow DW_AT_specification though, that will take us back up
13381 the chain and we want to go down. */
13382 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
13385 type
= get_DW_AT_signature_type (die
, attr
, cu
);
13387 /* The type's CU may not be the same as CU.
13388 Ensure TYPE is recorded with CU in die_type_hash. */
13389 return set_die_type (die
, type
, cu
);
13392 type
= alloc_type (objfile
);
13393 INIT_CPLUS_SPECIFIC (type
);
13395 name
= dwarf2_name (die
, cu
);
13398 if (cu
->language
== language_cplus
13399 || cu
->language
== language_d
13400 || cu
->language
== language_rust
)
13402 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
13404 /* dwarf2_full_name might have already finished building the DIE's
13405 type. If so, there is no need to continue. */
13406 if (get_die_type (die
, cu
) != NULL
)
13407 return get_die_type (die
, cu
);
13409 TYPE_TAG_NAME (type
) = full_name
;
13410 if (die
->tag
== DW_TAG_structure_type
13411 || die
->tag
== DW_TAG_class_type
)
13412 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
13416 /* The name is already allocated along with this objfile, so
13417 we don't need to duplicate it for the type. */
13418 TYPE_TAG_NAME (type
) = name
;
13419 if (die
->tag
== DW_TAG_class_type
)
13420 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
13424 if (die
->tag
== DW_TAG_structure_type
)
13426 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13428 else if (die
->tag
== DW_TAG_union_type
)
13430 TYPE_CODE (type
) = TYPE_CODE_UNION
;
13434 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13437 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
13438 TYPE_DECLARED_CLASS (type
) = 1;
13440 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13443 if (attr_form_is_constant (attr
))
13444 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13447 /* For the moment, dynamic type sizes are not supported
13448 by GDB's struct type. The actual size is determined
13449 on-demand when resolving the type of a given object,
13450 so set the type's length to zero for now. Otherwise,
13451 we record an expression as the length, and that expression
13452 could lead to a very large value, which could eventually
13453 lead to us trying to allocate that much memory when creating
13454 a value of that type. */
13455 TYPE_LENGTH (type
) = 0;
13460 TYPE_LENGTH (type
) = 0;
13463 if (producer_is_icc (cu
) && (TYPE_LENGTH (type
) == 0))
13465 /* ICC does not output the required DW_AT_declaration
13466 on incomplete types, but gives them a size of zero. */
13467 TYPE_STUB (type
) = 1;
13470 TYPE_STUB_SUPPORTED (type
) = 1;
13472 if (die_is_declaration (die
, cu
))
13473 TYPE_STUB (type
) = 1;
13474 else if (attr
== NULL
&& die
->child
== NULL
13475 && producer_is_realview (cu
->producer
))
13476 /* RealView does not output the required DW_AT_declaration
13477 on incomplete types. */
13478 TYPE_STUB (type
) = 1;
13480 /* We need to add the type field to the die immediately so we don't
13481 infinitely recurse when dealing with pointers to the structure
13482 type within the structure itself. */
13483 set_die_type (die
, type
, cu
);
13485 /* set_die_type should be already done. */
13486 set_descriptive_type (type
, die
, cu
);
13491 /* Finish creating a structure or union type, including filling in
13492 its members and creating a symbol for it. */
13495 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13497 struct objfile
*objfile
= cu
->objfile
;
13498 struct die_info
*child_die
;
13501 type
= get_die_type (die
, cu
);
13503 type
= read_structure_type (die
, cu
);
13505 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
13507 struct field_info fi
;
13508 VEC (symbolp
) *template_args
= NULL
;
13509 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
13511 memset (&fi
, 0, sizeof (struct field_info
));
13513 child_die
= die
->child
;
13515 while (child_die
&& child_die
->tag
)
13517 if (child_die
->tag
== DW_TAG_member
13518 || child_die
->tag
== DW_TAG_variable
)
13520 /* NOTE: carlton/2002-11-05: A C++ static data member
13521 should be a DW_TAG_member that is a declaration, but
13522 all versions of G++ as of this writing (so through at
13523 least 3.2.1) incorrectly generate DW_TAG_variable
13524 tags for them instead. */
13525 dwarf2_add_field (&fi
, child_die
, cu
);
13527 else if (child_die
->tag
== DW_TAG_subprogram
)
13529 /* Rust doesn't have member functions in the C++ sense.
13530 However, it does emit ordinary functions as children
13531 of a struct DIE. */
13532 if (cu
->language
== language_rust
)
13533 read_func_scope (child_die
, cu
);
13536 /* C++ member function. */
13537 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
13540 else if (child_die
->tag
== DW_TAG_inheritance
)
13542 /* C++ base class field. */
13543 dwarf2_add_field (&fi
, child_die
, cu
);
13545 else if (child_die
->tag
== DW_TAG_typedef
)
13546 dwarf2_add_typedef (&fi
, child_die
, cu
);
13547 else if (child_die
->tag
== DW_TAG_template_type_param
13548 || child_die
->tag
== DW_TAG_template_value_param
)
13550 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13553 VEC_safe_push (symbolp
, template_args
, arg
);
13556 child_die
= sibling_die (child_die
);
13559 /* Attach template arguments to type. */
13560 if (! VEC_empty (symbolp
, template_args
))
13562 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13563 TYPE_N_TEMPLATE_ARGUMENTS (type
)
13564 = VEC_length (symbolp
, template_args
);
13565 TYPE_TEMPLATE_ARGUMENTS (type
)
13566 = XOBNEWVEC (&objfile
->objfile_obstack
,
13568 TYPE_N_TEMPLATE_ARGUMENTS (type
));
13569 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
13570 VEC_address (symbolp
, template_args
),
13571 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
13572 * sizeof (struct symbol
*)));
13573 VEC_free (symbolp
, template_args
);
13576 /* Attach fields and member functions to the type. */
13578 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
13581 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
13583 /* Get the type which refers to the base class (possibly this
13584 class itself) which contains the vtable pointer for the current
13585 class from the DW_AT_containing_type attribute. This use of
13586 DW_AT_containing_type is a GNU extension. */
13588 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
13590 struct type
*t
= die_containing_type (die
, cu
);
13592 set_type_vptr_basetype (type
, t
);
13597 /* Our own class provides vtbl ptr. */
13598 for (i
= TYPE_NFIELDS (t
) - 1;
13599 i
>= TYPE_N_BASECLASSES (t
);
13602 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
13604 if (is_vtable_name (fieldname
, cu
))
13606 set_type_vptr_fieldno (type
, i
);
13611 /* Complain if virtual function table field not found. */
13612 if (i
< TYPE_N_BASECLASSES (t
))
13613 complaint (&symfile_complaints
,
13614 _("virtual function table pointer "
13615 "not found when defining class '%s'"),
13616 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
13621 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
13624 else if (cu
->producer
13625 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
13627 /* The IBM XLC compiler does not provide direct indication
13628 of the containing type, but the vtable pointer is
13629 always named __vfp. */
13633 for (i
= TYPE_NFIELDS (type
) - 1;
13634 i
>= TYPE_N_BASECLASSES (type
);
13637 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
13639 set_type_vptr_fieldno (type
, i
);
13640 set_type_vptr_basetype (type
, type
);
13647 /* Copy fi.typedef_field_list linked list elements content into the
13648 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
13649 if (fi
.typedef_field_list
)
13651 int i
= fi
.typedef_field_list_count
;
13653 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13654 TYPE_TYPEDEF_FIELD_ARRAY (type
)
13655 = ((struct typedef_field
*)
13656 TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
));
13657 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
13659 /* Reverse the list order to keep the debug info elements order. */
13662 struct typedef_field
*dest
, *src
;
13664 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
13665 src
= &fi
.typedef_field_list
->field
;
13666 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
13671 do_cleanups (back_to
);
13674 quirk_gcc_member_function_pointer (type
, objfile
);
13676 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
13677 snapshots) has been known to create a die giving a declaration
13678 for a class that has, as a child, a die giving a definition for a
13679 nested class. So we have to process our children even if the
13680 current die is a declaration. Normally, of course, a declaration
13681 won't have any children at all. */
13683 child_die
= die
->child
;
13685 while (child_die
!= NULL
&& child_die
->tag
)
13687 if (child_die
->tag
== DW_TAG_member
13688 || child_die
->tag
== DW_TAG_variable
13689 || child_die
->tag
== DW_TAG_inheritance
13690 || child_die
->tag
== DW_TAG_template_value_param
13691 || child_die
->tag
== DW_TAG_template_type_param
)
13696 process_die (child_die
, cu
);
13698 child_die
= sibling_die (child_die
);
13701 /* Do not consider external references. According to the DWARF standard,
13702 these DIEs are identified by the fact that they have no byte_size
13703 attribute, and a declaration attribute. */
13704 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
13705 || !die_is_declaration (die
, cu
))
13706 new_symbol (die
, type
, cu
);
13709 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
13710 update TYPE using some information only available in DIE's children. */
13713 update_enumeration_type_from_children (struct die_info
*die
,
13715 struct dwarf2_cu
*cu
)
13717 struct obstack obstack
;
13718 struct die_info
*child_die
;
13719 int unsigned_enum
= 1;
13722 struct cleanup
*old_chain
;
13724 obstack_init (&obstack
);
13725 old_chain
= make_cleanup_obstack_free (&obstack
);
13727 for (child_die
= die
->child
;
13728 child_die
!= NULL
&& child_die
->tag
;
13729 child_die
= sibling_die (child_die
))
13731 struct attribute
*attr
;
13733 const gdb_byte
*bytes
;
13734 struct dwarf2_locexpr_baton
*baton
;
13737 if (child_die
->tag
!= DW_TAG_enumerator
)
13740 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
13744 name
= dwarf2_name (child_die
, cu
);
13746 name
= "<anonymous enumerator>";
13748 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
13749 &value
, &bytes
, &baton
);
13755 else if ((mask
& value
) != 0)
13760 /* If we already know that the enum type is neither unsigned, nor
13761 a flag type, no need to look at the rest of the enumerates. */
13762 if (!unsigned_enum
&& !flag_enum
)
13767 TYPE_UNSIGNED (type
) = 1;
13769 TYPE_FLAG_ENUM (type
) = 1;
13771 do_cleanups (old_chain
);
13774 /* Given a DW_AT_enumeration_type die, set its type. We do not
13775 complete the type's fields yet, or create any symbols. */
13777 static struct type
*
13778 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13780 struct objfile
*objfile
= cu
->objfile
;
13782 struct attribute
*attr
;
13785 /* If the definition of this type lives in .debug_types, read that type.
13786 Don't follow DW_AT_specification though, that will take us back up
13787 the chain and we want to go down. */
13788 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
13791 type
= get_DW_AT_signature_type (die
, attr
, cu
);
13793 /* The type's CU may not be the same as CU.
13794 Ensure TYPE is recorded with CU in die_type_hash. */
13795 return set_die_type (die
, type
, cu
);
13798 type
= alloc_type (objfile
);
13800 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
13801 name
= dwarf2_full_name (NULL
, die
, cu
);
13803 TYPE_TAG_NAME (type
) = name
;
13805 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
13808 struct type
*underlying_type
= die_type (die
, cu
);
13810 TYPE_TARGET_TYPE (type
) = underlying_type
;
13813 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13816 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13820 TYPE_LENGTH (type
) = 0;
13823 /* The enumeration DIE can be incomplete. In Ada, any type can be
13824 declared as private in the package spec, and then defined only
13825 inside the package body. Such types are known as Taft Amendment
13826 Types. When another package uses such a type, an incomplete DIE
13827 may be generated by the compiler. */
13828 if (die_is_declaration (die
, cu
))
13829 TYPE_STUB (type
) = 1;
13831 /* Finish the creation of this type by using the enum's children.
13832 We must call this even when the underlying type has been provided
13833 so that we can determine if we're looking at a "flag" enum. */
13834 update_enumeration_type_from_children (die
, type
, cu
);
13836 /* If this type has an underlying type that is not a stub, then we
13837 may use its attributes. We always use the "unsigned" attribute
13838 in this situation, because ordinarily we guess whether the type
13839 is unsigned -- but the guess can be wrong and the underlying type
13840 can tell us the reality. However, we defer to a local size
13841 attribute if one exists, because this lets the compiler override
13842 the underlying type if needed. */
13843 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
13845 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
13846 if (TYPE_LENGTH (type
) == 0)
13847 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
13850 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
13852 return set_die_type (die
, type
, cu
);
13855 /* Given a pointer to a die which begins an enumeration, process all
13856 the dies that define the members of the enumeration, and create the
13857 symbol for the enumeration type.
13859 NOTE: We reverse the order of the element list. */
13862 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13864 struct type
*this_type
;
13866 this_type
= get_die_type (die
, cu
);
13867 if (this_type
== NULL
)
13868 this_type
= read_enumeration_type (die
, cu
);
13870 if (die
->child
!= NULL
)
13872 struct die_info
*child_die
;
13873 struct symbol
*sym
;
13874 struct field
*fields
= NULL
;
13875 int num_fields
= 0;
13878 child_die
= die
->child
;
13879 while (child_die
&& child_die
->tag
)
13881 if (child_die
->tag
!= DW_TAG_enumerator
)
13883 process_die (child_die
, cu
);
13887 name
= dwarf2_name (child_die
, cu
);
13890 sym
= new_symbol (child_die
, this_type
, cu
);
13892 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
13894 fields
= (struct field
*)
13896 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
13897 * sizeof (struct field
));
13900 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
13901 FIELD_TYPE (fields
[num_fields
]) = NULL
;
13902 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
13903 FIELD_BITSIZE (fields
[num_fields
]) = 0;
13909 child_die
= sibling_die (child_die
);
13914 TYPE_NFIELDS (this_type
) = num_fields
;
13915 TYPE_FIELDS (this_type
) = (struct field
*)
13916 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
13917 memcpy (TYPE_FIELDS (this_type
), fields
,
13918 sizeof (struct field
) * num_fields
);
13923 /* If we are reading an enum from a .debug_types unit, and the enum
13924 is a declaration, and the enum is not the signatured type in the
13925 unit, then we do not want to add a symbol for it. Adding a
13926 symbol would in some cases obscure the true definition of the
13927 enum, giving users an incomplete type when the definition is
13928 actually available. Note that we do not want to do this for all
13929 enums which are just declarations, because C++0x allows forward
13930 enum declarations. */
13931 if (cu
->per_cu
->is_debug_types
13932 && die_is_declaration (die
, cu
))
13934 struct signatured_type
*sig_type
;
13936 sig_type
= (struct signatured_type
*) cu
->per_cu
;
13937 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
13938 if (sig_type
->type_offset_in_section
.sect_off
!= die
->offset
.sect_off
)
13942 new_symbol (die
, this_type
, cu
);
13945 /* Extract all information from a DW_TAG_array_type DIE and put it in
13946 the DIE's type field. For now, this only handles one dimensional
13949 static struct type
*
13950 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13952 struct objfile
*objfile
= cu
->objfile
;
13953 struct die_info
*child_die
;
13955 struct type
*element_type
, *range_type
, *index_type
;
13956 struct type
**range_types
= NULL
;
13957 struct attribute
*attr
;
13959 struct cleanup
*back_to
;
13961 unsigned int bit_stride
= 0;
13963 element_type
= die_type (die
, cu
);
13965 /* The die_type call above may have already set the type for this DIE. */
13966 type
= get_die_type (die
, cu
);
13970 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
13972 bit_stride
= DW_UNSND (attr
) * 8;
13974 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
13976 bit_stride
= DW_UNSND (attr
);
13978 /* Irix 6.2 native cc creates array types without children for
13979 arrays with unspecified length. */
13980 if (die
->child
== NULL
)
13982 index_type
= objfile_type (objfile
)->builtin_int
;
13983 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
13984 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
13986 return set_die_type (die
, type
, cu
);
13989 back_to
= make_cleanup (null_cleanup
, NULL
);
13990 child_die
= die
->child
;
13991 while (child_die
&& child_die
->tag
)
13993 if (child_die
->tag
== DW_TAG_subrange_type
)
13995 struct type
*child_type
= read_type_die (child_die
, cu
);
13997 if (child_type
!= NULL
)
13999 /* The range type was succesfully read. Save it for the
14000 array type creation. */
14001 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
14003 range_types
= (struct type
**)
14004 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
14005 * sizeof (struct type
*));
14007 make_cleanup (free_current_contents
, &range_types
);
14009 range_types
[ndim
++] = child_type
;
14012 child_die
= sibling_die (child_die
);
14015 /* Dwarf2 dimensions are output from left to right, create the
14016 necessary array types in backwards order. */
14018 type
= element_type
;
14020 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
14025 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
14031 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
14035 /* Understand Dwarf2 support for vector types (like they occur on
14036 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
14037 array type. This is not part of the Dwarf2/3 standard yet, but a
14038 custom vendor extension. The main difference between a regular
14039 array and the vector variant is that vectors are passed by value
14041 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
14043 make_vector_type (type
);
14045 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
14046 implementation may choose to implement triple vectors using this
14048 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14051 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
14052 TYPE_LENGTH (type
) = DW_UNSND (attr
);
14054 complaint (&symfile_complaints
,
14055 _("DW_AT_byte_size for array type smaller "
14056 "than the total size of elements"));
14059 name
= dwarf2_name (die
, cu
);
14061 TYPE_NAME (type
) = name
;
14063 /* Install the type in the die. */
14064 set_die_type (die
, type
, cu
);
14066 /* set_die_type should be already done. */
14067 set_descriptive_type (type
, die
, cu
);
14069 do_cleanups (back_to
);
14074 static enum dwarf_array_dim_ordering
14075 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
14077 struct attribute
*attr
;
14079 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
14082 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
14084 /* GNU F77 is a special case, as at 08/2004 array type info is the
14085 opposite order to the dwarf2 specification, but data is still
14086 laid out as per normal fortran.
14088 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
14089 version checking. */
14091 if (cu
->language
== language_fortran
14092 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
14094 return DW_ORD_row_major
;
14097 switch (cu
->language_defn
->la_array_ordering
)
14099 case array_column_major
:
14100 return DW_ORD_col_major
;
14101 case array_row_major
:
14103 return DW_ORD_row_major
;
14107 /* Extract all information from a DW_TAG_set_type DIE and put it in
14108 the DIE's type field. */
14110 static struct type
*
14111 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14113 struct type
*domain_type
, *set_type
;
14114 struct attribute
*attr
;
14116 domain_type
= die_type (die
, cu
);
14118 /* The die_type call above may have already set the type for this DIE. */
14119 set_type
= get_die_type (die
, cu
);
14123 set_type
= create_set_type (NULL
, domain_type
);
14125 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14127 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
14129 return set_die_type (die
, set_type
, cu
);
14132 /* A helper for read_common_block that creates a locexpr baton.
14133 SYM is the symbol which we are marking as computed.
14134 COMMON_DIE is the DIE for the common block.
14135 COMMON_LOC is the location expression attribute for the common
14137 MEMBER_LOC is the location expression attribute for the particular
14138 member of the common block that we are processing.
14139 CU is the CU from which the above come. */
14142 mark_common_block_symbol_computed (struct symbol
*sym
,
14143 struct die_info
*common_die
,
14144 struct attribute
*common_loc
,
14145 struct attribute
*member_loc
,
14146 struct dwarf2_cu
*cu
)
14148 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14149 struct dwarf2_locexpr_baton
*baton
;
14151 unsigned int cu_off
;
14152 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
14153 LONGEST offset
= 0;
14155 gdb_assert (common_loc
&& member_loc
);
14156 gdb_assert (attr_form_is_block (common_loc
));
14157 gdb_assert (attr_form_is_block (member_loc
)
14158 || attr_form_is_constant (member_loc
));
14160 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
14161 baton
->per_cu
= cu
->per_cu
;
14162 gdb_assert (baton
->per_cu
);
14164 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
14166 if (attr_form_is_constant (member_loc
))
14168 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
14169 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
14172 baton
->size
+= DW_BLOCK (member_loc
)->size
;
14174 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
14177 *ptr
++ = DW_OP_call4
;
14178 cu_off
= common_die
->offset
.sect_off
- cu
->per_cu
->offset
.sect_off
;
14179 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
14182 if (attr_form_is_constant (member_loc
))
14184 *ptr
++ = DW_OP_addr
;
14185 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
14186 ptr
+= cu
->header
.addr_size
;
14190 /* We have to copy the data here, because DW_OP_call4 will only
14191 use a DW_AT_location attribute. */
14192 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
14193 ptr
+= DW_BLOCK (member_loc
)->size
;
14196 *ptr
++ = DW_OP_plus
;
14197 gdb_assert (ptr
- baton
->data
== baton
->size
);
14199 SYMBOL_LOCATION_BATON (sym
) = baton
;
14200 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
14203 /* Create appropriate locally-scoped variables for all the
14204 DW_TAG_common_block entries. Also create a struct common_block
14205 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
14206 is used to sepate the common blocks name namespace from regular
14210 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
14212 struct attribute
*attr
;
14214 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
14217 /* Support the .debug_loc offsets. */
14218 if (attr_form_is_block (attr
))
14222 else if (attr_form_is_section_offset (attr
))
14224 dwarf2_complex_location_expr_complaint ();
14229 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
14230 "common block member");
14235 if (die
->child
!= NULL
)
14237 struct objfile
*objfile
= cu
->objfile
;
14238 struct die_info
*child_die
;
14239 size_t n_entries
= 0, size
;
14240 struct common_block
*common_block
;
14241 struct symbol
*sym
;
14243 for (child_die
= die
->child
;
14244 child_die
&& child_die
->tag
;
14245 child_die
= sibling_die (child_die
))
14248 size
= (sizeof (struct common_block
)
14249 + (n_entries
- 1) * sizeof (struct symbol
*));
14251 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
14253 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
14254 common_block
->n_entries
= 0;
14256 for (child_die
= die
->child
;
14257 child_die
&& child_die
->tag
;
14258 child_die
= sibling_die (child_die
))
14260 /* Create the symbol in the DW_TAG_common_block block in the current
14262 sym
= new_symbol (child_die
, NULL
, cu
);
14265 struct attribute
*member_loc
;
14267 common_block
->contents
[common_block
->n_entries
++] = sym
;
14269 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
14273 /* GDB has handled this for a long time, but it is
14274 not specified by DWARF. It seems to have been
14275 emitted by gfortran at least as recently as:
14276 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
14277 complaint (&symfile_complaints
,
14278 _("Variable in common block has "
14279 "DW_AT_data_member_location "
14280 "- DIE at 0x%x [in module %s]"),
14281 child_die
->offset
.sect_off
,
14282 objfile_name (cu
->objfile
));
14284 if (attr_form_is_section_offset (member_loc
))
14285 dwarf2_complex_location_expr_complaint ();
14286 else if (attr_form_is_constant (member_loc
)
14287 || attr_form_is_block (member_loc
))
14290 mark_common_block_symbol_computed (sym
, die
, attr
,
14294 dwarf2_complex_location_expr_complaint ();
14299 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
14300 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
14304 /* Create a type for a C++ namespace. */
14306 static struct type
*
14307 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14309 struct objfile
*objfile
= cu
->objfile
;
14310 const char *previous_prefix
, *name
;
14314 /* For extensions, reuse the type of the original namespace. */
14315 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
14317 struct die_info
*ext_die
;
14318 struct dwarf2_cu
*ext_cu
= cu
;
14320 ext_die
= dwarf2_extension (die
, &ext_cu
);
14321 type
= read_type_die (ext_die
, ext_cu
);
14323 /* EXT_CU may not be the same as CU.
14324 Ensure TYPE is recorded with CU in die_type_hash. */
14325 return set_die_type (die
, type
, cu
);
14328 name
= namespace_name (die
, &is_anonymous
, cu
);
14330 /* Now build the name of the current namespace. */
14332 previous_prefix
= determine_prefix (die
, cu
);
14333 if (previous_prefix
[0] != '\0')
14334 name
= typename_concat (&objfile
->objfile_obstack
,
14335 previous_prefix
, name
, 0, cu
);
14337 /* Create the type. */
14338 type
= init_type (objfile
, TYPE_CODE_NAMESPACE
, 0, name
);
14339 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
14341 return set_die_type (die
, type
, cu
);
14344 /* Read a namespace scope. */
14347 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
14349 struct objfile
*objfile
= cu
->objfile
;
14352 /* Add a symbol associated to this if we haven't seen the namespace
14353 before. Also, add a using directive if it's an anonymous
14356 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
14360 type
= read_type_die (die
, cu
);
14361 new_symbol (die
, type
, cu
);
14363 namespace_name (die
, &is_anonymous
, cu
);
14366 const char *previous_prefix
= determine_prefix (die
, cu
);
14368 add_using_directive (using_directives (cu
->language
),
14369 previous_prefix
, TYPE_NAME (type
), NULL
,
14370 NULL
, NULL
, 0, &objfile
->objfile_obstack
);
14374 if (die
->child
!= NULL
)
14376 struct die_info
*child_die
= die
->child
;
14378 while (child_die
&& child_die
->tag
)
14380 process_die (child_die
, cu
);
14381 child_die
= sibling_die (child_die
);
14386 /* Read a Fortran module as type. This DIE can be only a declaration used for
14387 imported module. Still we need that type as local Fortran "use ... only"
14388 declaration imports depend on the created type in determine_prefix. */
14390 static struct type
*
14391 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14393 struct objfile
*objfile
= cu
->objfile
;
14394 const char *module_name
;
14397 module_name
= dwarf2_name (die
, cu
);
14399 complaint (&symfile_complaints
,
14400 _("DW_TAG_module has no name, offset 0x%x"),
14401 die
->offset
.sect_off
);
14402 type
= init_type (objfile
, TYPE_CODE_MODULE
, 0, module_name
);
14404 /* determine_prefix uses TYPE_TAG_NAME. */
14405 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
14407 return set_die_type (die
, type
, cu
);
14410 /* Read a Fortran module. */
14413 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
14415 struct die_info
*child_die
= die
->child
;
14418 type
= read_type_die (die
, cu
);
14419 new_symbol (die
, type
, cu
);
14421 while (child_die
&& child_die
->tag
)
14423 process_die (child_die
, cu
);
14424 child_die
= sibling_die (child_die
);
14428 /* Return the name of the namespace represented by DIE. Set
14429 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
14432 static const char *
14433 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
14435 struct die_info
*current_die
;
14436 const char *name
= NULL
;
14438 /* Loop through the extensions until we find a name. */
14440 for (current_die
= die
;
14441 current_die
!= NULL
;
14442 current_die
= dwarf2_extension (die
, &cu
))
14444 /* We don't use dwarf2_name here so that we can detect the absence
14445 of a name -> anonymous namespace. */
14446 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
14452 /* Is it an anonymous namespace? */
14454 *is_anonymous
= (name
== NULL
);
14456 name
= CP_ANONYMOUS_NAMESPACE_STR
;
14461 /* Extract all information from a DW_TAG_pointer_type DIE and add to
14462 the user defined type vector. */
14464 static struct type
*
14465 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14467 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
14468 struct comp_unit_head
*cu_header
= &cu
->header
;
14470 struct attribute
*attr_byte_size
;
14471 struct attribute
*attr_address_class
;
14472 int byte_size
, addr_class
;
14473 struct type
*target_type
;
14475 target_type
= die_type (die
, cu
);
14477 /* The die_type call above may have already set the type for this DIE. */
14478 type
= get_die_type (die
, cu
);
14482 type
= lookup_pointer_type (target_type
);
14484 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14485 if (attr_byte_size
)
14486 byte_size
= DW_UNSND (attr_byte_size
);
14488 byte_size
= cu_header
->addr_size
;
14490 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
14491 if (attr_address_class
)
14492 addr_class
= DW_UNSND (attr_address_class
);
14494 addr_class
= DW_ADDR_none
;
14496 /* If the pointer size or address class is different than the
14497 default, create a type variant marked as such and set the
14498 length accordingly. */
14499 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
14501 if (gdbarch_address_class_type_flags_p (gdbarch
))
14505 type_flags
= gdbarch_address_class_type_flags
14506 (gdbarch
, byte_size
, addr_class
);
14507 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
14509 type
= make_type_with_address_space (type
, type_flags
);
14511 else if (TYPE_LENGTH (type
) != byte_size
)
14513 complaint (&symfile_complaints
,
14514 _("invalid pointer size %d"), byte_size
);
14518 /* Should we also complain about unhandled address classes? */
14522 TYPE_LENGTH (type
) = byte_size
;
14523 return set_die_type (die
, type
, cu
);
14526 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
14527 the user defined type vector. */
14529 static struct type
*
14530 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14533 struct type
*to_type
;
14534 struct type
*domain
;
14536 to_type
= die_type (die
, cu
);
14537 domain
= die_containing_type (die
, cu
);
14539 /* The calls above may have already set the type for this DIE. */
14540 type
= get_die_type (die
, cu
);
14544 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
14545 type
= lookup_methodptr_type (to_type
);
14546 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
14548 struct type
*new_type
= alloc_type (cu
->objfile
);
14550 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
14551 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
14552 TYPE_VARARGS (to_type
));
14553 type
= lookup_methodptr_type (new_type
);
14556 type
= lookup_memberptr_type (to_type
, domain
);
14558 return set_die_type (die
, type
, cu
);
14561 /* Extract all information from a DW_TAG_reference_type DIE and add to
14562 the user defined type vector. */
14564 static struct type
*
14565 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14567 struct comp_unit_head
*cu_header
= &cu
->header
;
14568 struct type
*type
, *target_type
;
14569 struct attribute
*attr
;
14571 target_type
= die_type (die
, cu
);
14573 /* The die_type call above may have already set the type for this DIE. */
14574 type
= get_die_type (die
, cu
);
14578 type
= lookup_reference_type (target_type
);
14579 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14582 TYPE_LENGTH (type
) = DW_UNSND (attr
);
14586 TYPE_LENGTH (type
) = cu_header
->addr_size
;
14588 return set_die_type (die
, type
, cu
);
14591 /* Add the given cv-qualifiers to the element type of the array. GCC
14592 outputs DWARF type qualifiers that apply to an array, not the
14593 element type. But GDB relies on the array element type to carry
14594 the cv-qualifiers. This mimics section 6.7.3 of the C99
14597 static struct type
*
14598 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
14599 struct type
*base_type
, int cnst
, int voltl
)
14601 struct type
*el_type
, *inner_array
;
14603 base_type
= copy_type (base_type
);
14604 inner_array
= base_type
;
14606 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
14608 TYPE_TARGET_TYPE (inner_array
) =
14609 copy_type (TYPE_TARGET_TYPE (inner_array
));
14610 inner_array
= TYPE_TARGET_TYPE (inner_array
);
14613 el_type
= TYPE_TARGET_TYPE (inner_array
);
14614 cnst
|= TYPE_CONST (el_type
);
14615 voltl
|= TYPE_VOLATILE (el_type
);
14616 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
14618 return set_die_type (die
, base_type
, cu
);
14621 static struct type
*
14622 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14624 struct type
*base_type
, *cv_type
;
14626 base_type
= die_type (die
, cu
);
14628 /* The die_type call above may have already set the type for this DIE. */
14629 cv_type
= get_die_type (die
, cu
);
14633 /* In case the const qualifier is applied to an array type, the element type
14634 is so qualified, not the array type (section 6.7.3 of C99). */
14635 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14636 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
14638 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
14639 return set_die_type (die
, cv_type
, cu
);
14642 static struct type
*
14643 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14645 struct type
*base_type
, *cv_type
;
14647 base_type
= die_type (die
, cu
);
14649 /* The die_type call above may have already set the type for this DIE. */
14650 cv_type
= get_die_type (die
, cu
);
14654 /* In case the volatile qualifier is applied to an array type, the
14655 element type is so qualified, not the array type (section 6.7.3
14657 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14658 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
14660 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
14661 return set_die_type (die
, cv_type
, cu
);
14664 /* Handle DW_TAG_restrict_type. */
14666 static struct type
*
14667 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14669 struct type
*base_type
, *cv_type
;
14671 base_type
= die_type (die
, cu
);
14673 /* The die_type call above may have already set the type for this DIE. */
14674 cv_type
= get_die_type (die
, cu
);
14678 cv_type
= make_restrict_type (base_type
);
14679 return set_die_type (die
, cv_type
, cu
);
14682 /* Handle DW_TAG_atomic_type. */
14684 static struct type
*
14685 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14687 struct type
*base_type
, *cv_type
;
14689 base_type
= die_type (die
, cu
);
14691 /* The die_type call above may have already set the type for this DIE. */
14692 cv_type
= get_die_type (die
, cu
);
14696 cv_type
= make_atomic_type (base_type
);
14697 return set_die_type (die
, cv_type
, cu
);
14700 /* Extract all information from a DW_TAG_string_type DIE and add to
14701 the user defined type vector. It isn't really a user defined type,
14702 but it behaves like one, with other DIE's using an AT_user_def_type
14703 attribute to reference it. */
14705 static struct type
*
14706 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14708 struct objfile
*objfile
= cu
->objfile
;
14709 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14710 struct type
*type
, *range_type
, *index_type
, *char_type
;
14711 struct attribute
*attr
;
14712 unsigned int length
;
14714 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
14717 length
= DW_UNSND (attr
);
14721 /* Check for the DW_AT_byte_size attribute. */
14722 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14725 length
= DW_UNSND (attr
);
14733 index_type
= objfile_type (objfile
)->builtin_int
;
14734 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
14735 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
14736 type
= create_string_type (NULL
, char_type
, range_type
);
14738 return set_die_type (die
, type
, cu
);
14741 /* Assuming that DIE corresponds to a function, returns nonzero
14742 if the function is prototyped. */
14745 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
14747 struct attribute
*attr
;
14749 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
14750 if (attr
&& (DW_UNSND (attr
) != 0))
14753 /* The DWARF standard implies that the DW_AT_prototyped attribute
14754 is only meaninful for C, but the concept also extends to other
14755 languages that allow unprototyped functions (Eg: Objective C).
14756 For all other languages, assume that functions are always
14758 if (cu
->language
!= language_c
14759 && cu
->language
!= language_objc
14760 && cu
->language
!= language_opencl
)
14763 /* RealView does not emit DW_AT_prototyped. We can not distinguish
14764 prototyped and unprototyped functions; default to prototyped,
14765 since that is more common in modern code (and RealView warns
14766 about unprototyped functions). */
14767 if (producer_is_realview (cu
->producer
))
14773 /* Handle DIES due to C code like:
14777 int (*funcp)(int a, long l);
14781 ('funcp' generates a DW_TAG_subroutine_type DIE). */
14783 static struct type
*
14784 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14786 struct objfile
*objfile
= cu
->objfile
;
14787 struct type
*type
; /* Type that this function returns. */
14788 struct type
*ftype
; /* Function that returns above type. */
14789 struct attribute
*attr
;
14791 type
= die_type (die
, cu
);
14793 /* The die_type call above may have already set the type for this DIE. */
14794 ftype
= get_die_type (die
, cu
);
14798 ftype
= lookup_function_type (type
);
14800 if (prototyped_function_p (die
, cu
))
14801 TYPE_PROTOTYPED (ftype
) = 1;
14803 /* Store the calling convention in the type if it's available in
14804 the subroutine die. Otherwise set the calling convention to
14805 the default value DW_CC_normal. */
14806 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
14808 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
14809 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
14810 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
14812 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
14814 /* Record whether the function returns normally to its caller or not
14815 if the DWARF producer set that information. */
14816 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
14817 if (attr
&& (DW_UNSND (attr
) != 0))
14818 TYPE_NO_RETURN (ftype
) = 1;
14820 /* We need to add the subroutine type to the die immediately so
14821 we don't infinitely recurse when dealing with parameters
14822 declared as the same subroutine type. */
14823 set_die_type (die
, ftype
, cu
);
14825 if (die
->child
!= NULL
)
14827 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
14828 struct die_info
*child_die
;
14829 int nparams
, iparams
;
14831 /* Count the number of parameters.
14832 FIXME: GDB currently ignores vararg functions, but knows about
14833 vararg member functions. */
14835 child_die
= die
->child
;
14836 while (child_die
&& child_die
->tag
)
14838 if (child_die
->tag
== DW_TAG_formal_parameter
)
14840 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
14841 TYPE_VARARGS (ftype
) = 1;
14842 child_die
= sibling_die (child_die
);
14845 /* Allocate storage for parameters and fill them in. */
14846 TYPE_NFIELDS (ftype
) = nparams
;
14847 TYPE_FIELDS (ftype
) = (struct field
*)
14848 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
14850 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
14851 even if we error out during the parameters reading below. */
14852 for (iparams
= 0; iparams
< nparams
; iparams
++)
14853 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
14856 child_die
= die
->child
;
14857 while (child_die
&& child_die
->tag
)
14859 if (child_die
->tag
== DW_TAG_formal_parameter
)
14861 struct type
*arg_type
;
14863 /* DWARF version 2 has no clean way to discern C++
14864 static and non-static member functions. G++ helps
14865 GDB by marking the first parameter for non-static
14866 member functions (which is the this pointer) as
14867 artificial. We pass this information to
14868 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
14870 DWARF version 3 added DW_AT_object_pointer, which GCC
14871 4.5 does not yet generate. */
14872 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
14874 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
14876 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
14877 arg_type
= die_type (child_die
, cu
);
14879 /* RealView does not mark THIS as const, which the testsuite
14880 expects. GCC marks THIS as const in method definitions,
14881 but not in the class specifications (GCC PR 43053). */
14882 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
14883 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
14886 struct dwarf2_cu
*arg_cu
= cu
;
14887 const char *name
= dwarf2_name (child_die
, cu
);
14889 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
14892 /* If the compiler emits this, use it. */
14893 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
14896 else if (name
&& strcmp (name
, "this") == 0)
14897 /* Function definitions will have the argument names. */
14899 else if (name
== NULL
&& iparams
== 0)
14900 /* Declarations may not have the names, so like
14901 elsewhere in GDB, assume an artificial first
14902 argument is "this". */
14906 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
14910 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
14913 child_die
= sibling_die (child_die
);
14920 static struct type
*
14921 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
14923 struct objfile
*objfile
= cu
->objfile
;
14924 const char *name
= NULL
;
14925 struct type
*this_type
, *target_type
;
14927 name
= dwarf2_full_name (NULL
, die
, cu
);
14928 this_type
= init_type (objfile
, TYPE_CODE_TYPEDEF
, 0, name
);
14929 TYPE_TARGET_STUB (this_type
) = 1;
14930 set_die_type (die
, this_type
, cu
);
14931 target_type
= die_type (die
, cu
);
14932 if (target_type
!= this_type
)
14933 TYPE_TARGET_TYPE (this_type
) = target_type
;
14936 /* Self-referential typedefs are, it seems, not allowed by the DWARF
14937 spec and cause infinite loops in GDB. */
14938 complaint (&symfile_complaints
,
14939 _("Self-referential DW_TAG_typedef "
14940 "- DIE at 0x%x [in module %s]"),
14941 die
->offset
.sect_off
, objfile_name (objfile
));
14942 TYPE_TARGET_TYPE (this_type
) = NULL
;
14947 /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT
14948 (which may be different from NAME) to the architecture back-end to allow
14949 it to guess the correct format if necessary. */
14951 static struct type
*
14952 dwarf2_init_float_type (struct objfile
*objfile
, int bits
, const char *name
,
14953 const char *name_hint
)
14955 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14956 const struct floatformat
**format
;
14959 format
= gdbarch_floatformat_for_type (gdbarch
, name_hint
, bits
);
14961 type
= init_float_type (objfile
, bits
, name
, format
);
14963 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
/ TARGET_CHAR_BIT
, name
);
14968 /* Find a representation of a given base type and install
14969 it in the TYPE field of the die. */
14971 static struct type
*
14972 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14974 struct objfile
*objfile
= cu
->objfile
;
14976 struct attribute
*attr
;
14977 int encoding
= 0, bits
= 0;
14980 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
14983 encoding
= DW_UNSND (attr
);
14985 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14988 bits
= DW_UNSND (attr
) * TARGET_CHAR_BIT
;
14990 name
= dwarf2_name (die
, cu
);
14993 complaint (&symfile_complaints
,
14994 _("DW_AT_name missing from DW_TAG_base_type"));
14999 case DW_ATE_address
:
15000 /* Turn DW_ATE_address into a void * pointer. */
15001 type
= init_type (objfile
, TYPE_CODE_VOID
, 1, NULL
);
15002 type
= init_pointer_type (objfile
, bits
, name
, type
);
15004 case DW_ATE_boolean
:
15005 type
= init_boolean_type (objfile
, bits
, 1, name
);
15007 case DW_ATE_complex_float
:
15008 type
= dwarf2_init_float_type (objfile
, bits
/ 2, NULL
, name
);
15009 type
= init_complex_type (objfile
, name
, type
);
15011 case DW_ATE_decimal_float
:
15012 type
= init_decfloat_type (objfile
, bits
, name
);
15015 type
= dwarf2_init_float_type (objfile
, bits
, name
, name
);
15017 case DW_ATE_signed
:
15018 type
= init_integer_type (objfile
, bits
, 0, name
);
15020 case DW_ATE_unsigned
:
15021 if (cu
->language
== language_fortran
15023 && startswith (name
, "character("))
15024 type
= init_character_type (objfile
, bits
, 1, name
);
15026 type
= init_integer_type (objfile
, bits
, 1, name
);
15028 case DW_ATE_signed_char
:
15029 if (cu
->language
== language_ada
|| cu
->language
== language_m2
15030 || cu
->language
== language_pascal
15031 || cu
->language
== language_fortran
)
15032 type
= init_character_type (objfile
, bits
, 0, name
);
15034 type
= init_integer_type (objfile
, bits
, 0, name
);
15036 case DW_ATE_unsigned_char
:
15037 if (cu
->language
== language_ada
|| cu
->language
== language_m2
15038 || cu
->language
== language_pascal
15039 || cu
->language
== language_fortran
15040 || cu
->language
== language_rust
)
15041 type
= init_character_type (objfile
, bits
, 1, name
);
15043 type
= init_integer_type (objfile
, bits
, 1, name
);
15046 /* We just treat this as an integer and then recognize the
15047 type by name elsewhere. */
15048 type
= init_integer_type (objfile
, bits
, 0, name
);
15052 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
15053 dwarf_type_encoding_name (encoding
));
15054 type
= init_type (objfile
, TYPE_CODE_ERROR
,
15055 bits
/ TARGET_CHAR_BIT
, name
);
15059 if (name
&& strcmp (name
, "char") == 0)
15060 TYPE_NOSIGN (type
) = 1;
15062 return set_die_type (die
, type
, cu
);
15065 /* Parse dwarf attribute if it's a block, reference or constant and put the
15066 resulting value of the attribute into struct bound_prop.
15067 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
15070 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
15071 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
)
15073 struct dwarf2_property_baton
*baton
;
15074 struct obstack
*obstack
= &cu
->objfile
->objfile_obstack
;
15076 if (attr
== NULL
|| prop
== NULL
)
15079 if (attr_form_is_block (attr
))
15081 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
15082 baton
->referenced_type
= NULL
;
15083 baton
->locexpr
.per_cu
= cu
->per_cu
;
15084 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
15085 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
15086 prop
->data
.baton
= baton
;
15087 prop
->kind
= PROP_LOCEXPR
;
15088 gdb_assert (prop
->data
.baton
!= NULL
);
15090 else if (attr_form_is_ref (attr
))
15092 struct dwarf2_cu
*target_cu
= cu
;
15093 struct die_info
*target_die
;
15094 struct attribute
*target_attr
;
15096 target_die
= follow_die_ref (die
, attr
, &target_cu
);
15097 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
15098 if (target_attr
== NULL
)
15099 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
15101 if (target_attr
== NULL
)
15104 switch (target_attr
->name
)
15106 case DW_AT_location
:
15107 if (attr_form_is_section_offset (target_attr
))
15109 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
15110 baton
->referenced_type
= die_type (target_die
, target_cu
);
15111 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
15112 prop
->data
.baton
= baton
;
15113 prop
->kind
= PROP_LOCLIST
;
15114 gdb_assert (prop
->data
.baton
!= NULL
);
15116 else if (attr_form_is_block (target_attr
))
15118 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
15119 baton
->referenced_type
= die_type (target_die
, target_cu
);
15120 baton
->locexpr
.per_cu
= cu
->per_cu
;
15121 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
15122 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
15123 prop
->data
.baton
= baton
;
15124 prop
->kind
= PROP_LOCEXPR
;
15125 gdb_assert (prop
->data
.baton
!= NULL
);
15129 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
15130 "dynamic property");
15134 case DW_AT_data_member_location
:
15138 if (!handle_data_member_location (target_die
, target_cu
,
15142 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
15143 baton
->referenced_type
= read_type_die (target_die
->parent
,
15145 baton
->offset_info
.offset
= offset
;
15146 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
15147 prop
->data
.baton
= baton
;
15148 prop
->kind
= PROP_ADDR_OFFSET
;
15153 else if (attr_form_is_constant (attr
))
15155 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
15156 prop
->kind
= PROP_CONST
;
15160 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
15161 dwarf2_name (die
, cu
));
15168 /* Read the given DW_AT_subrange DIE. */
15170 static struct type
*
15171 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15173 struct type
*base_type
, *orig_base_type
;
15174 struct type
*range_type
;
15175 struct attribute
*attr
;
15176 struct dynamic_prop low
, high
;
15177 int low_default_is_valid
;
15178 int high_bound_is_count
= 0;
15180 LONGEST negative_mask
;
15182 orig_base_type
= die_type (die
, cu
);
15183 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
15184 whereas the real type might be. So, we use ORIG_BASE_TYPE when
15185 creating the range type, but we use the result of check_typedef
15186 when examining properties of the type. */
15187 base_type
= check_typedef (orig_base_type
);
15189 /* The die_type call above may have already set the type for this DIE. */
15190 range_type
= get_die_type (die
, cu
);
15194 low
.kind
= PROP_CONST
;
15195 high
.kind
= PROP_CONST
;
15196 high
.data
.const_val
= 0;
15198 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
15199 omitting DW_AT_lower_bound. */
15200 switch (cu
->language
)
15203 case language_cplus
:
15204 low
.data
.const_val
= 0;
15205 low_default_is_valid
= 1;
15207 case language_fortran
:
15208 low
.data
.const_val
= 1;
15209 low_default_is_valid
= 1;
15212 case language_objc
:
15213 case language_rust
:
15214 low
.data
.const_val
= 0;
15215 low_default_is_valid
= (cu
->header
.version
>= 4);
15219 case language_pascal
:
15220 low
.data
.const_val
= 1;
15221 low_default_is_valid
= (cu
->header
.version
>= 4);
15224 low
.data
.const_val
= 0;
15225 low_default_is_valid
= 0;
15229 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
15231 attr_to_dynamic_prop (attr
, die
, cu
, &low
);
15232 else if (!low_default_is_valid
)
15233 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
15234 "- DIE at 0x%x [in module %s]"),
15235 die
->offset
.sect_off
, objfile_name (cu
->objfile
));
15237 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
15238 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
))
15240 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
15241 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
))
15243 /* If bounds are constant do the final calculation here. */
15244 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
15245 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
15247 high_bound_is_count
= 1;
15251 /* Dwarf-2 specifications explicitly allows to create subrange types
15252 without specifying a base type.
15253 In that case, the base type must be set to the type of
15254 the lower bound, upper bound or count, in that order, if any of these
15255 three attributes references an object that has a type.
15256 If no base type is found, the Dwarf-2 specifications say that
15257 a signed integer type of size equal to the size of an address should
15259 For the following C code: `extern char gdb_int [];'
15260 GCC produces an empty range DIE.
15261 FIXME: muller/2010-05-28: Possible references to object for low bound,
15262 high bound or count are not yet handled by this code. */
15263 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
15265 struct objfile
*objfile
= cu
->objfile
;
15266 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15267 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
15268 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
15270 /* Test "int", "long int", and "long long int" objfile types,
15271 and select the first one having a size above or equal to the
15272 architecture address size. */
15273 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15274 base_type
= int_type
;
15277 int_type
= objfile_type (objfile
)->builtin_long
;
15278 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15279 base_type
= int_type
;
15282 int_type
= objfile_type (objfile
)->builtin_long_long
;
15283 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15284 base_type
= int_type
;
15289 /* Normally, the DWARF producers are expected to use a signed
15290 constant form (Eg. DW_FORM_sdata) to express negative bounds.
15291 But this is unfortunately not always the case, as witnessed
15292 with GCC, for instance, where the ambiguous DW_FORM_dataN form
15293 is used instead. To work around that ambiguity, we treat
15294 the bounds as signed, and thus sign-extend their values, when
15295 the base type is signed. */
15297 -((LONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
15298 if (low
.kind
== PROP_CONST
15299 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
15300 low
.data
.const_val
|= negative_mask
;
15301 if (high
.kind
== PROP_CONST
15302 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
15303 high
.data
.const_val
|= negative_mask
;
15305 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
);
15307 if (high_bound_is_count
)
15308 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
15310 /* Ada expects an empty array on no boundary attributes. */
15311 if (attr
== NULL
&& cu
->language
!= language_ada
)
15312 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
15314 name
= dwarf2_name (die
, cu
);
15316 TYPE_NAME (range_type
) = name
;
15318 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15320 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
15322 set_die_type (die
, range_type
, cu
);
15324 /* set_die_type should be already done. */
15325 set_descriptive_type (range_type
, die
, cu
);
15330 static struct type
*
15331 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15335 /* For now, we only support the C meaning of an unspecified type: void. */
15337 type
= init_type (cu
->objfile
, TYPE_CODE_VOID
, 0, NULL
);
15338 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
15340 return set_die_type (die
, type
, cu
);
15343 /* Read a single die and all its descendents. Set the die's sibling
15344 field to NULL; set other fields in the die correctly, and set all
15345 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
15346 location of the info_ptr after reading all of those dies. PARENT
15347 is the parent of the die in question. */
15349 static struct die_info
*
15350 read_die_and_children (const struct die_reader_specs
*reader
,
15351 const gdb_byte
*info_ptr
,
15352 const gdb_byte
**new_info_ptr
,
15353 struct die_info
*parent
)
15355 struct die_info
*die
;
15356 const gdb_byte
*cur_ptr
;
15359 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
15362 *new_info_ptr
= cur_ptr
;
15365 store_in_ref_table (die
, reader
->cu
);
15368 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
15372 *new_info_ptr
= cur_ptr
;
15375 die
->sibling
= NULL
;
15376 die
->parent
= parent
;
15380 /* Read a die, all of its descendents, and all of its siblings; set
15381 all of the fields of all of the dies correctly. Arguments are as
15382 in read_die_and_children. */
15384 static struct die_info
*
15385 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
15386 const gdb_byte
*info_ptr
,
15387 const gdb_byte
**new_info_ptr
,
15388 struct die_info
*parent
)
15390 struct die_info
*first_die
, *last_sibling
;
15391 const gdb_byte
*cur_ptr
;
15393 cur_ptr
= info_ptr
;
15394 first_die
= last_sibling
= NULL
;
15398 struct die_info
*die
15399 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
15403 *new_info_ptr
= cur_ptr
;
15410 last_sibling
->sibling
= die
;
15412 last_sibling
= die
;
15416 /* Read a die, all of its descendents, and all of its siblings; set
15417 all of the fields of all of the dies correctly. Arguments are as
15418 in read_die_and_children.
15419 This the main entry point for reading a DIE and all its children. */
15421 static struct die_info
*
15422 read_die_and_siblings (const struct die_reader_specs
*reader
,
15423 const gdb_byte
*info_ptr
,
15424 const gdb_byte
**new_info_ptr
,
15425 struct die_info
*parent
)
15427 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
15428 new_info_ptr
, parent
);
15430 if (dwarf_die_debug
)
15432 fprintf_unfiltered (gdb_stdlog
,
15433 "Read die from %s@0x%x of %s:\n",
15434 get_section_name (reader
->die_section
),
15435 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
15436 bfd_get_filename (reader
->abfd
));
15437 dump_die (die
, dwarf_die_debug
);
15443 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
15445 The caller is responsible for filling in the extra attributes
15446 and updating (*DIEP)->num_attrs.
15447 Set DIEP to point to a newly allocated die with its information,
15448 except for its child, sibling, and parent fields.
15449 Set HAS_CHILDREN to tell whether the die has children or not. */
15451 static const gdb_byte
*
15452 read_full_die_1 (const struct die_reader_specs
*reader
,
15453 struct die_info
**diep
, const gdb_byte
*info_ptr
,
15454 int *has_children
, int num_extra_attrs
)
15456 unsigned int abbrev_number
, bytes_read
, i
;
15457 sect_offset offset
;
15458 struct abbrev_info
*abbrev
;
15459 struct die_info
*die
;
15460 struct dwarf2_cu
*cu
= reader
->cu
;
15461 bfd
*abfd
= reader
->abfd
;
15463 offset
.sect_off
= info_ptr
- reader
->buffer
;
15464 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
15465 info_ptr
+= bytes_read
;
15466 if (!abbrev_number
)
15473 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
15475 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
15477 bfd_get_filename (abfd
));
15479 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
15480 die
->offset
= offset
;
15481 die
->tag
= abbrev
->tag
;
15482 die
->abbrev
= abbrev_number
;
15484 /* Make the result usable.
15485 The caller needs to update num_attrs after adding the extra
15487 die
->num_attrs
= abbrev
->num_attrs
;
15489 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
15490 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
15494 *has_children
= abbrev
->has_children
;
15498 /* Read a die and all its attributes.
15499 Set DIEP to point to a newly allocated die with its information,
15500 except for its child, sibling, and parent fields.
15501 Set HAS_CHILDREN to tell whether the die has children or not. */
15503 static const gdb_byte
*
15504 read_full_die (const struct die_reader_specs
*reader
,
15505 struct die_info
**diep
, const gdb_byte
*info_ptr
,
15508 const gdb_byte
*result
;
15510 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
15512 if (dwarf_die_debug
)
15514 fprintf_unfiltered (gdb_stdlog
,
15515 "Read die from %s@0x%x of %s:\n",
15516 get_section_name (reader
->die_section
),
15517 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
15518 bfd_get_filename (reader
->abfd
));
15519 dump_die (*diep
, dwarf_die_debug
);
15525 /* Abbreviation tables.
15527 In DWARF version 2, the description of the debugging information is
15528 stored in a separate .debug_abbrev section. Before we read any
15529 dies from a section we read in all abbreviations and install them
15530 in a hash table. */
15532 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
15534 static struct abbrev_info
*
15535 abbrev_table_alloc_abbrev (struct abbrev_table
*abbrev_table
)
15537 struct abbrev_info
*abbrev
;
15539 abbrev
= XOBNEW (&abbrev_table
->abbrev_obstack
, struct abbrev_info
);
15540 memset (abbrev
, 0, sizeof (struct abbrev_info
));
15545 /* Add an abbreviation to the table. */
15548 abbrev_table_add_abbrev (struct abbrev_table
*abbrev_table
,
15549 unsigned int abbrev_number
,
15550 struct abbrev_info
*abbrev
)
15552 unsigned int hash_number
;
15554 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15555 abbrev
->next
= abbrev_table
->abbrevs
[hash_number
];
15556 abbrev_table
->abbrevs
[hash_number
] = abbrev
;
15559 /* Look up an abbrev in the table.
15560 Returns NULL if the abbrev is not found. */
15562 static struct abbrev_info
*
15563 abbrev_table_lookup_abbrev (const struct abbrev_table
*abbrev_table
,
15564 unsigned int abbrev_number
)
15566 unsigned int hash_number
;
15567 struct abbrev_info
*abbrev
;
15569 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15570 abbrev
= abbrev_table
->abbrevs
[hash_number
];
15574 if (abbrev
->number
== abbrev_number
)
15576 abbrev
= abbrev
->next
;
15581 /* Read in an abbrev table. */
15583 static struct abbrev_table
*
15584 abbrev_table_read_table (struct dwarf2_section_info
*section
,
15585 sect_offset offset
)
15587 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
15588 bfd
*abfd
= get_section_bfd_owner (section
);
15589 struct abbrev_table
*abbrev_table
;
15590 const gdb_byte
*abbrev_ptr
;
15591 struct abbrev_info
*cur_abbrev
;
15592 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
15593 unsigned int abbrev_form
;
15594 struct attr_abbrev
*cur_attrs
;
15595 unsigned int allocated_attrs
;
15597 abbrev_table
= XNEW (struct abbrev_table
);
15598 abbrev_table
->offset
= offset
;
15599 obstack_init (&abbrev_table
->abbrev_obstack
);
15600 abbrev_table
->abbrevs
=
15601 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct abbrev_info
*,
15603 memset (abbrev_table
->abbrevs
, 0,
15604 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
15606 dwarf2_read_section (objfile
, section
);
15607 abbrev_ptr
= section
->buffer
+ offset
.sect_off
;
15608 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15609 abbrev_ptr
+= bytes_read
;
15611 allocated_attrs
= ATTR_ALLOC_CHUNK
;
15612 cur_attrs
= XNEWVEC (struct attr_abbrev
, allocated_attrs
);
15614 /* Loop until we reach an abbrev number of 0. */
15615 while (abbrev_number
)
15617 cur_abbrev
= abbrev_table_alloc_abbrev (abbrev_table
);
15619 /* read in abbrev header */
15620 cur_abbrev
->number
= abbrev_number
;
15622 = (enum dwarf_tag
) read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15623 abbrev_ptr
+= bytes_read
;
15624 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
15627 /* now read in declarations */
15630 LONGEST implicit_const
;
15632 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15633 abbrev_ptr
+= bytes_read
;
15634 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15635 abbrev_ptr
+= bytes_read
;
15636 if (abbrev_form
== DW_FORM_implicit_const
)
15638 implicit_const
= read_signed_leb128 (abfd
, abbrev_ptr
,
15640 abbrev_ptr
+= bytes_read
;
15644 /* Initialize it due to a false compiler warning. */
15645 implicit_const
= -1;
15648 if (abbrev_name
== 0)
15651 if (cur_abbrev
->num_attrs
== allocated_attrs
)
15653 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
15655 = XRESIZEVEC (struct attr_abbrev
, cur_attrs
, allocated_attrs
);
15658 cur_attrs
[cur_abbrev
->num_attrs
].name
15659 = (enum dwarf_attribute
) abbrev_name
;
15660 cur_attrs
[cur_abbrev
->num_attrs
].form
15661 = (enum dwarf_form
) abbrev_form
;
15662 cur_attrs
[cur_abbrev
->num_attrs
].implicit_const
= implicit_const
;
15663 ++cur_abbrev
->num_attrs
;
15666 cur_abbrev
->attrs
=
15667 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct attr_abbrev
,
15668 cur_abbrev
->num_attrs
);
15669 memcpy (cur_abbrev
->attrs
, cur_attrs
,
15670 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
15672 abbrev_table_add_abbrev (abbrev_table
, abbrev_number
, cur_abbrev
);
15674 /* Get next abbreviation.
15675 Under Irix6 the abbreviations for a compilation unit are not
15676 always properly terminated with an abbrev number of 0.
15677 Exit loop if we encounter an abbreviation which we have
15678 already read (which means we are about to read the abbreviations
15679 for the next compile unit) or if the end of the abbreviation
15680 table is reached. */
15681 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
15683 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15684 abbrev_ptr
+= bytes_read
;
15685 if (abbrev_table_lookup_abbrev (abbrev_table
, abbrev_number
) != NULL
)
15690 return abbrev_table
;
15693 /* Free the resources held by ABBREV_TABLE. */
15696 abbrev_table_free (struct abbrev_table
*abbrev_table
)
15698 obstack_free (&abbrev_table
->abbrev_obstack
, NULL
);
15699 xfree (abbrev_table
);
15702 /* Same as abbrev_table_free but as a cleanup.
15703 We pass in a pointer to the pointer to the table so that we can
15704 set the pointer to NULL when we're done. It also simplifies
15705 build_type_psymtabs_1. */
15708 abbrev_table_free_cleanup (void *table_ptr
)
15710 struct abbrev_table
**abbrev_table_ptr
= (struct abbrev_table
**) table_ptr
;
15712 if (*abbrev_table_ptr
!= NULL
)
15713 abbrev_table_free (*abbrev_table_ptr
);
15714 *abbrev_table_ptr
= NULL
;
15717 /* Read the abbrev table for CU from ABBREV_SECTION. */
15720 dwarf2_read_abbrevs (struct dwarf2_cu
*cu
,
15721 struct dwarf2_section_info
*abbrev_section
)
15724 abbrev_table_read_table (abbrev_section
, cu
->header
.abbrev_offset
);
15727 /* Release the memory used by the abbrev table for a compilation unit. */
15730 dwarf2_free_abbrev_table (void *ptr_to_cu
)
15732 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr_to_cu
;
15734 if (cu
->abbrev_table
!= NULL
)
15735 abbrev_table_free (cu
->abbrev_table
);
15736 /* Set this to NULL so that we SEGV if we try to read it later,
15737 and also because free_comp_unit verifies this is NULL. */
15738 cu
->abbrev_table
= NULL
;
15741 /* Returns nonzero if TAG represents a type that we might generate a partial
15745 is_type_tag_for_partial (int tag
)
15750 /* Some types that would be reasonable to generate partial symbols for,
15751 that we don't at present. */
15752 case DW_TAG_array_type
:
15753 case DW_TAG_file_type
:
15754 case DW_TAG_ptr_to_member_type
:
15755 case DW_TAG_set_type
:
15756 case DW_TAG_string_type
:
15757 case DW_TAG_subroutine_type
:
15759 case DW_TAG_base_type
:
15760 case DW_TAG_class_type
:
15761 case DW_TAG_interface_type
:
15762 case DW_TAG_enumeration_type
:
15763 case DW_TAG_structure_type
:
15764 case DW_TAG_subrange_type
:
15765 case DW_TAG_typedef
:
15766 case DW_TAG_union_type
:
15773 /* Load all DIEs that are interesting for partial symbols into memory. */
15775 static struct partial_die_info
*
15776 load_partial_dies (const struct die_reader_specs
*reader
,
15777 const gdb_byte
*info_ptr
, int building_psymtab
)
15779 struct dwarf2_cu
*cu
= reader
->cu
;
15780 struct objfile
*objfile
= cu
->objfile
;
15781 struct partial_die_info
*part_die
;
15782 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
15783 struct abbrev_info
*abbrev
;
15784 unsigned int bytes_read
;
15785 unsigned int load_all
= 0;
15786 int nesting_level
= 1;
15791 gdb_assert (cu
->per_cu
!= NULL
);
15792 if (cu
->per_cu
->load_all_dies
)
15796 = htab_create_alloc_ex (cu
->header
.length
/ 12,
15800 &cu
->comp_unit_obstack
,
15801 hashtab_obstack_allocate
,
15802 dummy_obstack_deallocate
);
15804 part_die
= XOBNEW (&cu
->comp_unit_obstack
, struct partial_die_info
);
15808 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
15810 /* A NULL abbrev means the end of a series of children. */
15811 if (abbrev
== NULL
)
15813 if (--nesting_level
== 0)
15815 /* PART_DIE was probably the last thing allocated on the
15816 comp_unit_obstack, so we could call obstack_free
15817 here. We don't do that because the waste is small,
15818 and will be cleaned up when we're done with this
15819 compilation unit. This way, we're also more robust
15820 against other users of the comp_unit_obstack. */
15823 info_ptr
+= bytes_read
;
15824 last_die
= parent_die
;
15825 parent_die
= parent_die
->die_parent
;
15829 /* Check for template arguments. We never save these; if
15830 they're seen, we just mark the parent, and go on our way. */
15831 if (parent_die
!= NULL
15832 && cu
->language
== language_cplus
15833 && (abbrev
->tag
== DW_TAG_template_type_param
15834 || abbrev
->tag
== DW_TAG_template_value_param
))
15836 parent_die
->has_template_arguments
= 1;
15840 /* We don't need a partial DIE for the template argument. */
15841 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15846 /* We only recurse into c++ subprograms looking for template arguments.
15847 Skip their other children. */
15849 && cu
->language
== language_cplus
15850 && parent_die
!= NULL
15851 && parent_die
->tag
== DW_TAG_subprogram
)
15853 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15857 /* Check whether this DIE is interesting enough to save. Normally
15858 we would not be interested in members here, but there may be
15859 later variables referencing them via DW_AT_specification (for
15860 static members). */
15862 && !is_type_tag_for_partial (abbrev
->tag
)
15863 && abbrev
->tag
!= DW_TAG_constant
15864 && abbrev
->tag
!= DW_TAG_enumerator
15865 && abbrev
->tag
!= DW_TAG_subprogram
15866 && abbrev
->tag
!= DW_TAG_lexical_block
15867 && abbrev
->tag
!= DW_TAG_variable
15868 && abbrev
->tag
!= DW_TAG_namespace
15869 && abbrev
->tag
!= DW_TAG_module
15870 && abbrev
->tag
!= DW_TAG_member
15871 && abbrev
->tag
!= DW_TAG_imported_unit
15872 && abbrev
->tag
!= DW_TAG_imported_declaration
)
15874 /* Otherwise we skip to the next sibling, if any. */
15875 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15879 info_ptr
= read_partial_die (reader
, part_die
, abbrev
, bytes_read
,
15882 /* This two-pass algorithm for processing partial symbols has a
15883 high cost in cache pressure. Thus, handle some simple cases
15884 here which cover the majority of C partial symbols. DIEs
15885 which neither have specification tags in them, nor could have
15886 specification tags elsewhere pointing at them, can simply be
15887 processed and discarded.
15889 This segment is also optional; scan_partial_symbols and
15890 add_partial_symbol will handle these DIEs if we chain
15891 them in normally. When compilers which do not emit large
15892 quantities of duplicate debug information are more common,
15893 this code can probably be removed. */
15895 /* Any complete simple types at the top level (pretty much all
15896 of them, for a language without namespaces), can be processed
15898 if (parent_die
== NULL
15899 && part_die
->has_specification
== 0
15900 && part_die
->is_declaration
== 0
15901 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
15902 || part_die
->tag
== DW_TAG_base_type
15903 || part_die
->tag
== DW_TAG_subrange_type
))
15905 if (building_psymtab
&& part_die
->name
!= NULL
)
15906 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
15907 VAR_DOMAIN
, LOC_TYPEDEF
,
15908 &objfile
->static_psymbols
,
15909 0, cu
->language
, objfile
);
15910 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
15914 /* The exception for DW_TAG_typedef with has_children above is
15915 a workaround of GCC PR debug/47510. In the case of this complaint
15916 type_name_no_tag_or_error will error on such types later.
15918 GDB skipped children of DW_TAG_typedef by the shortcut above and then
15919 it could not find the child DIEs referenced later, this is checked
15920 above. In correct DWARF DW_TAG_typedef should have no children. */
15922 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
15923 complaint (&symfile_complaints
,
15924 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
15925 "- DIE at 0x%x [in module %s]"),
15926 part_die
->offset
.sect_off
, objfile_name (objfile
));
15928 /* If we're at the second level, and we're an enumerator, and
15929 our parent has no specification (meaning possibly lives in a
15930 namespace elsewhere), then we can add the partial symbol now
15931 instead of queueing it. */
15932 if (part_die
->tag
== DW_TAG_enumerator
15933 && parent_die
!= NULL
15934 && parent_die
->die_parent
== NULL
15935 && parent_die
->tag
== DW_TAG_enumeration_type
15936 && parent_die
->has_specification
== 0)
15938 if (part_die
->name
== NULL
)
15939 complaint (&symfile_complaints
,
15940 _("malformed enumerator DIE ignored"));
15941 else if (building_psymtab
)
15942 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
15943 VAR_DOMAIN
, LOC_CONST
,
15944 cu
->language
== language_cplus
15945 ? &objfile
->global_psymbols
15946 : &objfile
->static_psymbols
,
15947 0, cu
->language
, objfile
);
15949 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
15953 /* We'll save this DIE so link it in. */
15954 part_die
->die_parent
= parent_die
;
15955 part_die
->die_sibling
= NULL
;
15956 part_die
->die_child
= NULL
;
15958 if (last_die
&& last_die
== parent_die
)
15959 last_die
->die_child
= part_die
;
15961 last_die
->die_sibling
= part_die
;
15963 last_die
= part_die
;
15965 if (first_die
== NULL
)
15966 first_die
= part_die
;
15968 /* Maybe add the DIE to the hash table. Not all DIEs that we
15969 find interesting need to be in the hash table, because we
15970 also have the parent/sibling/child chains; only those that we
15971 might refer to by offset later during partial symbol reading.
15973 For now this means things that might have be the target of a
15974 DW_AT_specification, DW_AT_abstract_origin, or
15975 DW_AT_extension. DW_AT_extension will refer only to
15976 namespaces; DW_AT_abstract_origin refers to functions (and
15977 many things under the function DIE, but we do not recurse
15978 into function DIEs during partial symbol reading) and
15979 possibly variables as well; DW_AT_specification refers to
15980 declarations. Declarations ought to have the DW_AT_declaration
15981 flag. It happens that GCC forgets to put it in sometimes, but
15982 only for functions, not for types.
15984 Adding more things than necessary to the hash table is harmless
15985 except for the performance cost. Adding too few will result in
15986 wasted time in find_partial_die, when we reread the compilation
15987 unit with load_all_dies set. */
15990 || abbrev
->tag
== DW_TAG_constant
15991 || abbrev
->tag
== DW_TAG_subprogram
15992 || abbrev
->tag
== DW_TAG_variable
15993 || abbrev
->tag
== DW_TAG_namespace
15994 || part_die
->is_declaration
)
15998 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
15999 part_die
->offset
.sect_off
, INSERT
);
16003 part_die
= XOBNEW (&cu
->comp_unit_obstack
, struct partial_die_info
);
16005 /* For some DIEs we want to follow their children (if any). For C
16006 we have no reason to follow the children of structures; for other
16007 languages we have to, so that we can get at method physnames
16008 to infer fully qualified class names, for DW_AT_specification,
16009 and for C++ template arguments. For C++, we also look one level
16010 inside functions to find template arguments (if the name of the
16011 function does not already contain the template arguments).
16013 For Ada, we need to scan the children of subprograms and lexical
16014 blocks as well because Ada allows the definition of nested
16015 entities that could be interesting for the debugger, such as
16016 nested subprograms for instance. */
16017 if (last_die
->has_children
16019 || last_die
->tag
== DW_TAG_namespace
16020 || last_die
->tag
== DW_TAG_module
16021 || last_die
->tag
== DW_TAG_enumeration_type
16022 || (cu
->language
== language_cplus
16023 && last_die
->tag
== DW_TAG_subprogram
16024 && (last_die
->name
== NULL
16025 || strchr (last_die
->name
, '<') == NULL
))
16026 || (cu
->language
!= language_c
16027 && (last_die
->tag
== DW_TAG_class_type
16028 || last_die
->tag
== DW_TAG_interface_type
16029 || last_die
->tag
== DW_TAG_structure_type
16030 || last_die
->tag
== DW_TAG_union_type
))
16031 || (cu
->language
== language_ada
16032 && (last_die
->tag
== DW_TAG_subprogram
16033 || last_die
->tag
== DW_TAG_lexical_block
))))
16036 parent_die
= last_die
;
16040 /* Otherwise we skip to the next sibling, if any. */
16041 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
16043 /* Back to the top, do it again. */
16047 /* Read a minimal amount of information into the minimal die structure. */
16049 static const gdb_byte
*
16050 read_partial_die (const struct die_reader_specs
*reader
,
16051 struct partial_die_info
*part_die
,
16052 struct abbrev_info
*abbrev
, unsigned int abbrev_len
,
16053 const gdb_byte
*info_ptr
)
16055 struct dwarf2_cu
*cu
= reader
->cu
;
16056 struct objfile
*objfile
= cu
->objfile
;
16057 const gdb_byte
*buffer
= reader
->buffer
;
16059 struct attribute attr
;
16060 int has_low_pc_attr
= 0;
16061 int has_high_pc_attr
= 0;
16062 int high_pc_relative
= 0;
16064 memset (part_die
, 0, sizeof (struct partial_die_info
));
16066 part_die
->offset
.sect_off
= info_ptr
- buffer
;
16068 info_ptr
+= abbrev_len
;
16070 if (abbrev
== NULL
)
16073 part_die
->tag
= abbrev
->tag
;
16074 part_die
->has_children
= abbrev
->has_children
;
16076 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
16078 info_ptr
= read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
16080 /* Store the data if it is of an attribute we want to keep in a
16081 partial symbol table. */
16085 switch (part_die
->tag
)
16087 case DW_TAG_compile_unit
:
16088 case DW_TAG_partial_unit
:
16089 case DW_TAG_type_unit
:
16090 /* Compilation units have a DW_AT_name that is a filename, not
16091 a source language identifier. */
16092 case DW_TAG_enumeration_type
:
16093 case DW_TAG_enumerator
:
16094 /* These tags always have simple identifiers already; no need
16095 to canonicalize them. */
16096 part_die
->name
= DW_STRING (&attr
);
16100 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
16101 &objfile
->per_bfd
->storage_obstack
);
16105 case DW_AT_linkage_name
:
16106 case DW_AT_MIPS_linkage_name
:
16107 /* Note that both forms of linkage name might appear. We
16108 assume they will be the same, and we only store the last
16110 if (cu
->language
== language_ada
)
16111 part_die
->name
= DW_STRING (&attr
);
16112 part_die
->linkage_name
= DW_STRING (&attr
);
16115 has_low_pc_attr
= 1;
16116 part_die
->lowpc
= attr_value_as_address (&attr
);
16118 case DW_AT_high_pc
:
16119 has_high_pc_attr
= 1;
16120 part_die
->highpc
= attr_value_as_address (&attr
);
16121 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
16122 high_pc_relative
= 1;
16124 case DW_AT_location
:
16125 /* Support the .debug_loc offsets. */
16126 if (attr_form_is_block (&attr
))
16128 part_die
->d
.locdesc
= DW_BLOCK (&attr
);
16130 else if (attr_form_is_section_offset (&attr
))
16132 dwarf2_complex_location_expr_complaint ();
16136 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
16137 "partial symbol information");
16140 case DW_AT_external
:
16141 part_die
->is_external
= DW_UNSND (&attr
);
16143 case DW_AT_declaration
:
16144 part_die
->is_declaration
= DW_UNSND (&attr
);
16147 part_die
->has_type
= 1;
16149 case DW_AT_abstract_origin
:
16150 case DW_AT_specification
:
16151 case DW_AT_extension
:
16152 part_die
->has_specification
= 1;
16153 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
16154 part_die
->spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
16155 || cu
->per_cu
->is_dwz
);
16157 case DW_AT_sibling
:
16158 /* Ignore absolute siblings, they might point outside of
16159 the current compile unit. */
16160 if (attr
.form
== DW_FORM_ref_addr
)
16161 complaint (&symfile_complaints
,
16162 _("ignoring absolute DW_AT_sibling"));
16165 unsigned int off
= dwarf2_get_ref_die_offset (&attr
).sect_off
;
16166 const gdb_byte
*sibling_ptr
= buffer
+ off
;
16168 if (sibling_ptr
< info_ptr
)
16169 complaint (&symfile_complaints
,
16170 _("DW_AT_sibling points backwards"));
16171 else if (sibling_ptr
> reader
->buffer_end
)
16172 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
16174 part_die
->sibling
= sibling_ptr
;
16177 case DW_AT_byte_size
:
16178 part_die
->has_byte_size
= 1;
16180 case DW_AT_const_value
:
16181 part_die
->has_const_value
= 1;
16183 case DW_AT_calling_convention
:
16184 /* DWARF doesn't provide a way to identify a program's source-level
16185 entry point. DW_AT_calling_convention attributes are only meant
16186 to describe functions' calling conventions.
16188 However, because it's a necessary piece of information in
16189 Fortran, and before DWARF 4 DW_CC_program was the only
16190 piece of debugging information whose definition refers to
16191 a 'main program' at all, several compilers marked Fortran
16192 main programs with DW_CC_program --- even when those
16193 functions use the standard calling conventions.
16195 Although DWARF now specifies a way to provide this
16196 information, we support this practice for backward
16198 if (DW_UNSND (&attr
) == DW_CC_program
16199 && cu
->language
== language_fortran
)
16200 part_die
->main_subprogram
= 1;
16203 if (DW_UNSND (&attr
) == DW_INL_inlined
16204 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
16205 part_die
->may_be_inlined
= 1;
16209 if (part_die
->tag
== DW_TAG_imported_unit
)
16211 part_die
->d
.offset
= dwarf2_get_ref_die_offset (&attr
);
16212 part_die
->is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
16213 || cu
->per_cu
->is_dwz
);
16217 case DW_AT_main_subprogram
:
16218 part_die
->main_subprogram
= DW_UNSND (&attr
);
16226 if (high_pc_relative
)
16227 part_die
->highpc
+= part_die
->lowpc
;
16229 if (has_low_pc_attr
&& has_high_pc_attr
)
16231 /* When using the GNU linker, .gnu.linkonce. sections are used to
16232 eliminate duplicate copies of functions and vtables and such.
16233 The linker will arbitrarily choose one and discard the others.
16234 The AT_*_pc values for such functions refer to local labels in
16235 these sections. If the section from that file was discarded, the
16236 labels are not in the output, so the relocs get a value of 0.
16237 If this is a discarded function, mark the pc bounds as invalid,
16238 so that GDB will ignore it. */
16239 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
16241 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
16243 complaint (&symfile_complaints
,
16244 _("DW_AT_low_pc %s is zero "
16245 "for DIE at 0x%x [in module %s]"),
16246 paddress (gdbarch
, part_die
->lowpc
),
16247 part_die
->offset
.sect_off
, objfile_name (objfile
));
16249 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
16250 else if (part_die
->lowpc
>= part_die
->highpc
)
16252 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
16254 complaint (&symfile_complaints
,
16255 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
16256 "for DIE at 0x%x [in module %s]"),
16257 paddress (gdbarch
, part_die
->lowpc
),
16258 paddress (gdbarch
, part_die
->highpc
),
16259 part_die
->offset
.sect_off
, objfile_name (objfile
));
16262 part_die
->has_pc_info
= 1;
16268 /* Find a cached partial DIE at OFFSET in CU. */
16270 static struct partial_die_info
*
16271 find_partial_die_in_comp_unit (sect_offset offset
, struct dwarf2_cu
*cu
)
16273 struct partial_die_info
*lookup_die
= NULL
;
16274 struct partial_die_info part_die
;
16276 part_die
.offset
= offset
;
16277 lookup_die
= ((struct partial_die_info
*)
16278 htab_find_with_hash (cu
->partial_dies
, &part_die
,
16284 /* Find a partial DIE at OFFSET, which may or may not be in CU,
16285 except in the case of .debug_types DIEs which do not reference
16286 outside their CU (they do however referencing other types via
16287 DW_FORM_ref_sig8). */
16289 static struct partial_die_info
*
16290 find_partial_die (sect_offset offset
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
16292 struct objfile
*objfile
= cu
->objfile
;
16293 struct dwarf2_per_cu_data
*per_cu
= NULL
;
16294 struct partial_die_info
*pd
= NULL
;
16296 if (offset_in_dwz
== cu
->per_cu
->is_dwz
16297 && offset_in_cu_p (&cu
->header
, offset
))
16299 pd
= find_partial_die_in_comp_unit (offset
, cu
);
16302 /* We missed recording what we needed.
16303 Load all dies and try again. */
16304 per_cu
= cu
->per_cu
;
16308 /* TUs don't reference other CUs/TUs (except via type signatures). */
16309 if (cu
->per_cu
->is_debug_types
)
16311 error (_("Dwarf Error: Type Unit at offset 0x%lx contains"
16312 " external reference to offset 0x%lx [in module %s].\n"),
16313 (long) cu
->header
.offset
.sect_off
, (long) offset
.sect_off
,
16314 bfd_get_filename (objfile
->obfd
));
16316 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
16319 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
16320 load_partial_comp_unit (per_cu
);
16322 per_cu
->cu
->last_used
= 0;
16323 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
16326 /* If we didn't find it, and not all dies have been loaded,
16327 load them all and try again. */
16329 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
16331 per_cu
->load_all_dies
= 1;
16333 /* This is nasty. When we reread the DIEs, somewhere up the call chain
16334 THIS_CU->cu may already be in use. So we can't just free it and
16335 replace its DIEs with the ones we read in. Instead, we leave those
16336 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
16337 and clobber THIS_CU->cu->partial_dies with the hash table for the new
16339 load_partial_comp_unit (per_cu
);
16341 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
16345 internal_error (__FILE__
, __LINE__
,
16346 _("could not find partial DIE 0x%x "
16347 "in cache [from module %s]\n"),
16348 offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
16352 /* See if we can figure out if the class lives in a namespace. We do
16353 this by looking for a member function; its demangled name will
16354 contain namespace info, if there is any. */
16357 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
16358 struct dwarf2_cu
*cu
)
16360 /* NOTE: carlton/2003-10-07: Getting the info this way changes
16361 what template types look like, because the demangler
16362 frequently doesn't give the same name as the debug info. We
16363 could fix this by only using the demangled name to get the
16364 prefix (but see comment in read_structure_type). */
16366 struct partial_die_info
*real_pdi
;
16367 struct partial_die_info
*child_pdi
;
16369 /* If this DIE (this DIE's specification, if any) has a parent, then
16370 we should not do this. We'll prepend the parent's fully qualified
16371 name when we create the partial symbol. */
16373 real_pdi
= struct_pdi
;
16374 while (real_pdi
->has_specification
)
16375 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
16376 real_pdi
->spec_is_dwz
, cu
);
16378 if (real_pdi
->die_parent
!= NULL
)
16381 for (child_pdi
= struct_pdi
->die_child
;
16383 child_pdi
= child_pdi
->die_sibling
)
16385 if (child_pdi
->tag
== DW_TAG_subprogram
16386 && child_pdi
->linkage_name
!= NULL
)
16388 char *actual_class_name
16389 = language_class_name_from_physname (cu
->language_defn
,
16390 child_pdi
->linkage_name
);
16391 if (actual_class_name
!= NULL
)
16395 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
16397 strlen (actual_class_name
)));
16398 xfree (actual_class_name
);
16405 /* Adjust PART_DIE before generating a symbol for it. This function
16406 may set the is_external flag or change the DIE's name. */
16409 fixup_partial_die (struct partial_die_info
*part_die
,
16410 struct dwarf2_cu
*cu
)
16412 /* Once we've fixed up a die, there's no point in doing so again.
16413 This also avoids a memory leak if we were to call
16414 guess_partial_die_structure_name multiple times. */
16415 if (part_die
->fixup_called
)
16418 /* If we found a reference attribute and the DIE has no name, try
16419 to find a name in the referred to DIE. */
16421 if (part_die
->name
== NULL
&& part_die
->has_specification
)
16423 struct partial_die_info
*spec_die
;
16425 spec_die
= find_partial_die (part_die
->spec_offset
,
16426 part_die
->spec_is_dwz
, cu
);
16428 fixup_partial_die (spec_die
, cu
);
16430 if (spec_die
->name
)
16432 part_die
->name
= spec_die
->name
;
16434 /* Copy DW_AT_external attribute if it is set. */
16435 if (spec_die
->is_external
)
16436 part_die
->is_external
= spec_die
->is_external
;
16440 /* Set default names for some unnamed DIEs. */
16442 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
16443 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
16445 /* If there is no parent die to provide a namespace, and there are
16446 children, see if we can determine the namespace from their linkage
16448 if (cu
->language
== language_cplus
16449 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
16450 && part_die
->die_parent
== NULL
16451 && part_die
->has_children
16452 && (part_die
->tag
== DW_TAG_class_type
16453 || part_die
->tag
== DW_TAG_structure_type
16454 || part_die
->tag
== DW_TAG_union_type
))
16455 guess_partial_die_structure_name (part_die
, cu
);
16457 /* GCC might emit a nameless struct or union that has a linkage
16458 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
16459 if (part_die
->name
== NULL
16460 && (part_die
->tag
== DW_TAG_class_type
16461 || part_die
->tag
== DW_TAG_interface_type
16462 || part_die
->tag
== DW_TAG_structure_type
16463 || part_die
->tag
== DW_TAG_union_type
)
16464 && part_die
->linkage_name
!= NULL
)
16468 demangled
= gdb_demangle (part_die
->linkage_name
, DMGL_TYPES
);
16473 /* Strip any leading namespaces/classes, keep only the base name.
16474 DW_AT_name for named DIEs does not contain the prefixes. */
16475 base
= strrchr (demangled
, ':');
16476 if (base
&& base
> demangled
&& base
[-1] == ':')
16483 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
16484 base
, strlen (base
)));
16489 part_die
->fixup_called
= 1;
16492 /* Read an attribute value described by an attribute form. */
16494 static const gdb_byte
*
16495 read_attribute_value (const struct die_reader_specs
*reader
,
16496 struct attribute
*attr
, unsigned form
,
16497 LONGEST implicit_const
, const gdb_byte
*info_ptr
)
16499 struct dwarf2_cu
*cu
= reader
->cu
;
16500 struct objfile
*objfile
= cu
->objfile
;
16501 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
16502 bfd
*abfd
= reader
->abfd
;
16503 struct comp_unit_head
*cu_header
= &cu
->header
;
16504 unsigned int bytes_read
;
16505 struct dwarf_block
*blk
;
16507 attr
->form
= (enum dwarf_form
) form
;
16510 case DW_FORM_ref_addr
:
16511 if (cu
->header
.version
== 2)
16512 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
16514 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
16515 &cu
->header
, &bytes_read
);
16516 info_ptr
+= bytes_read
;
16518 case DW_FORM_GNU_ref_alt
:
16519 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
16520 info_ptr
+= bytes_read
;
16523 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
16524 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
16525 info_ptr
+= bytes_read
;
16527 case DW_FORM_block2
:
16528 blk
= dwarf_alloc_block (cu
);
16529 blk
->size
= read_2_bytes (abfd
, info_ptr
);
16531 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16532 info_ptr
+= blk
->size
;
16533 DW_BLOCK (attr
) = blk
;
16535 case DW_FORM_block4
:
16536 blk
= dwarf_alloc_block (cu
);
16537 blk
->size
= read_4_bytes (abfd
, info_ptr
);
16539 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16540 info_ptr
+= blk
->size
;
16541 DW_BLOCK (attr
) = blk
;
16543 case DW_FORM_data2
:
16544 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
16547 case DW_FORM_data4
:
16548 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
16551 case DW_FORM_data8
:
16552 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
16555 case DW_FORM_sec_offset
:
16556 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
16557 info_ptr
+= bytes_read
;
16559 case DW_FORM_string
:
16560 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
16561 DW_STRING_IS_CANONICAL (attr
) = 0;
16562 info_ptr
+= bytes_read
;
16565 if (!cu
->per_cu
->is_dwz
)
16567 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
16569 DW_STRING_IS_CANONICAL (attr
) = 0;
16570 info_ptr
+= bytes_read
;
16574 case DW_FORM_line_strp
:
16575 if (!cu
->per_cu
->is_dwz
)
16577 DW_STRING (attr
) = read_indirect_line_string (abfd
, info_ptr
,
16578 cu_header
, &bytes_read
);
16579 DW_STRING_IS_CANONICAL (attr
) = 0;
16580 info_ptr
+= bytes_read
;
16584 case DW_FORM_GNU_strp_alt
:
16586 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
16587 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
16590 DW_STRING (attr
) = read_indirect_string_from_dwz (dwz
, str_offset
);
16591 DW_STRING_IS_CANONICAL (attr
) = 0;
16592 info_ptr
+= bytes_read
;
16595 case DW_FORM_exprloc
:
16596 case DW_FORM_block
:
16597 blk
= dwarf_alloc_block (cu
);
16598 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16599 info_ptr
+= bytes_read
;
16600 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16601 info_ptr
+= blk
->size
;
16602 DW_BLOCK (attr
) = blk
;
16604 case DW_FORM_block1
:
16605 blk
= dwarf_alloc_block (cu
);
16606 blk
->size
= read_1_byte (abfd
, info_ptr
);
16608 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16609 info_ptr
+= blk
->size
;
16610 DW_BLOCK (attr
) = blk
;
16612 case DW_FORM_data1
:
16613 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16617 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16620 case DW_FORM_flag_present
:
16621 DW_UNSND (attr
) = 1;
16623 case DW_FORM_sdata
:
16624 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
16625 info_ptr
+= bytes_read
;
16627 case DW_FORM_udata
:
16628 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16629 info_ptr
+= bytes_read
;
16632 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16633 + read_1_byte (abfd
, info_ptr
));
16637 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16638 + read_2_bytes (abfd
, info_ptr
));
16642 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16643 + read_4_bytes (abfd
, info_ptr
));
16647 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16648 + read_8_bytes (abfd
, info_ptr
));
16651 case DW_FORM_ref_sig8
:
16652 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
16655 case DW_FORM_ref_udata
:
16656 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16657 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
16658 info_ptr
+= bytes_read
;
16660 case DW_FORM_indirect
:
16661 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16662 info_ptr
+= bytes_read
;
16663 if (form
== DW_FORM_implicit_const
)
16665 implicit_const
= read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
16666 info_ptr
+= bytes_read
;
16668 info_ptr
= read_attribute_value (reader
, attr
, form
, implicit_const
,
16671 case DW_FORM_implicit_const
:
16672 DW_SND (attr
) = implicit_const
;
16674 case DW_FORM_GNU_addr_index
:
16675 if (reader
->dwo_file
== NULL
)
16677 /* For now flag a hard error.
16678 Later we can turn this into a complaint. */
16679 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16680 dwarf_form_name (form
),
16681 bfd_get_filename (abfd
));
16683 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
16684 info_ptr
+= bytes_read
;
16686 case DW_FORM_GNU_str_index
:
16687 if (reader
->dwo_file
== NULL
)
16689 /* For now flag a hard error.
16690 Later we can turn this into a complaint if warranted. */
16691 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16692 dwarf_form_name (form
),
16693 bfd_get_filename (abfd
));
16696 ULONGEST str_index
=
16697 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16699 DW_STRING (attr
) = read_str_index (reader
, str_index
);
16700 DW_STRING_IS_CANONICAL (attr
) = 0;
16701 info_ptr
+= bytes_read
;
16705 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
16706 dwarf_form_name (form
),
16707 bfd_get_filename (abfd
));
16711 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
16712 attr
->form
= DW_FORM_GNU_ref_alt
;
16714 /* We have seen instances where the compiler tried to emit a byte
16715 size attribute of -1 which ended up being encoded as an unsigned
16716 0xffffffff. Although 0xffffffff is technically a valid size value,
16717 an object of this size seems pretty unlikely so we can relatively
16718 safely treat these cases as if the size attribute was invalid and
16719 treat them as zero by default. */
16720 if (attr
->name
== DW_AT_byte_size
16721 && form
== DW_FORM_data4
16722 && DW_UNSND (attr
) >= 0xffffffff)
16725 (&symfile_complaints
,
16726 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
16727 hex_string (DW_UNSND (attr
)));
16728 DW_UNSND (attr
) = 0;
16734 /* Read an attribute described by an abbreviated attribute. */
16736 static const gdb_byte
*
16737 read_attribute (const struct die_reader_specs
*reader
,
16738 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
16739 const gdb_byte
*info_ptr
)
16741 attr
->name
= abbrev
->name
;
16742 return read_attribute_value (reader
, attr
, abbrev
->form
,
16743 abbrev
->implicit_const
, info_ptr
);
16746 /* Read dwarf information from a buffer. */
16748 static unsigned int
16749 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
16751 return bfd_get_8 (abfd
, buf
);
16755 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
16757 return bfd_get_signed_8 (abfd
, buf
);
16760 static unsigned int
16761 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16763 return bfd_get_16 (abfd
, buf
);
16767 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16769 return bfd_get_signed_16 (abfd
, buf
);
16772 static unsigned int
16773 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16775 return bfd_get_32 (abfd
, buf
);
16779 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16781 return bfd_get_signed_32 (abfd
, buf
);
16785 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16787 return bfd_get_64 (abfd
, buf
);
16791 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
16792 unsigned int *bytes_read
)
16794 struct comp_unit_head
*cu_header
= &cu
->header
;
16795 CORE_ADDR retval
= 0;
16797 if (cu_header
->signed_addr_p
)
16799 switch (cu_header
->addr_size
)
16802 retval
= bfd_get_signed_16 (abfd
, buf
);
16805 retval
= bfd_get_signed_32 (abfd
, buf
);
16808 retval
= bfd_get_signed_64 (abfd
, buf
);
16811 internal_error (__FILE__
, __LINE__
,
16812 _("read_address: bad switch, signed [in module %s]"),
16813 bfd_get_filename (abfd
));
16818 switch (cu_header
->addr_size
)
16821 retval
= bfd_get_16 (abfd
, buf
);
16824 retval
= bfd_get_32 (abfd
, buf
);
16827 retval
= bfd_get_64 (abfd
, buf
);
16830 internal_error (__FILE__
, __LINE__
,
16831 _("read_address: bad switch, "
16832 "unsigned [in module %s]"),
16833 bfd_get_filename (abfd
));
16837 *bytes_read
= cu_header
->addr_size
;
16841 /* Read the initial length from a section. The (draft) DWARF 3
16842 specification allows the initial length to take up either 4 bytes
16843 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
16844 bytes describe the length and all offsets will be 8 bytes in length
16847 An older, non-standard 64-bit format is also handled by this
16848 function. The older format in question stores the initial length
16849 as an 8-byte quantity without an escape value. Lengths greater
16850 than 2^32 aren't very common which means that the initial 4 bytes
16851 is almost always zero. Since a length value of zero doesn't make
16852 sense for the 32-bit format, this initial zero can be considered to
16853 be an escape value which indicates the presence of the older 64-bit
16854 format. As written, the code can't detect (old format) lengths
16855 greater than 4GB. If it becomes necessary to handle lengths
16856 somewhat larger than 4GB, we could allow other small values (such
16857 as the non-sensical values of 1, 2, and 3) to also be used as
16858 escape values indicating the presence of the old format.
16860 The value returned via bytes_read should be used to increment the
16861 relevant pointer after calling read_initial_length().
16863 [ Note: read_initial_length() and read_offset() are based on the
16864 document entitled "DWARF Debugging Information Format", revision
16865 3, draft 8, dated November 19, 2001. This document was obtained
16868 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
16870 This document is only a draft and is subject to change. (So beware.)
16872 Details regarding the older, non-standard 64-bit format were
16873 determined empirically by examining 64-bit ELF files produced by
16874 the SGI toolchain on an IRIX 6.5 machine.
16876 - Kevin, July 16, 2002
16880 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
16882 LONGEST length
= bfd_get_32 (abfd
, buf
);
16884 if (length
== 0xffffffff)
16886 length
= bfd_get_64 (abfd
, buf
+ 4);
16889 else if (length
== 0)
16891 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
16892 length
= bfd_get_64 (abfd
, buf
);
16903 /* Cover function for read_initial_length.
16904 Returns the length of the object at BUF, and stores the size of the
16905 initial length in *BYTES_READ and stores the size that offsets will be in
16907 If the initial length size is not equivalent to that specified in
16908 CU_HEADER then issue a complaint.
16909 This is useful when reading non-comp-unit headers. */
16912 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
16913 const struct comp_unit_head
*cu_header
,
16914 unsigned int *bytes_read
,
16915 unsigned int *offset_size
)
16917 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
16919 gdb_assert (cu_header
->initial_length_size
== 4
16920 || cu_header
->initial_length_size
== 8
16921 || cu_header
->initial_length_size
== 12);
16923 if (cu_header
->initial_length_size
!= *bytes_read
)
16924 complaint (&symfile_complaints
,
16925 _("intermixed 32-bit and 64-bit DWARF sections"));
16927 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
16931 /* Read an offset from the data stream. The size of the offset is
16932 given by cu_header->offset_size. */
16935 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
16936 const struct comp_unit_head
*cu_header
,
16937 unsigned int *bytes_read
)
16939 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
16941 *bytes_read
= cu_header
->offset_size
;
16945 /* Read an offset from the data stream. */
16948 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
16950 LONGEST retval
= 0;
16952 switch (offset_size
)
16955 retval
= bfd_get_32 (abfd
, buf
);
16958 retval
= bfd_get_64 (abfd
, buf
);
16961 internal_error (__FILE__
, __LINE__
,
16962 _("read_offset_1: bad switch [in module %s]"),
16963 bfd_get_filename (abfd
));
16969 static const gdb_byte
*
16970 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
16972 /* If the size of a host char is 8 bits, we can return a pointer
16973 to the buffer, otherwise we have to copy the data to a buffer
16974 allocated on the temporary obstack. */
16975 gdb_assert (HOST_CHAR_BIT
== 8);
16979 static const char *
16980 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
16981 unsigned int *bytes_read_ptr
)
16983 /* If the size of a host char is 8 bits, we can return a pointer
16984 to the string, otherwise we have to copy the string to a buffer
16985 allocated on the temporary obstack. */
16986 gdb_assert (HOST_CHAR_BIT
== 8);
16989 *bytes_read_ptr
= 1;
16992 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
16993 return (const char *) buf
;
16996 /* Return pointer to string at section SECT offset STR_OFFSET with error
16997 reporting strings FORM_NAME and SECT_NAME. */
16999 static const char *
17000 read_indirect_string_at_offset_from (bfd
*abfd
, LONGEST str_offset
,
17001 struct dwarf2_section_info
*sect
,
17002 const char *form_name
,
17003 const char *sect_name
)
17005 dwarf2_read_section (dwarf2_per_objfile
->objfile
, sect
);
17006 if (sect
->buffer
== NULL
)
17007 error (_("%s used without %s section [in module %s]"),
17008 form_name
, sect_name
, bfd_get_filename (abfd
));
17009 if (str_offset
>= sect
->size
)
17010 error (_("%s pointing outside of %s section [in module %s]"),
17011 form_name
, sect_name
, bfd_get_filename (abfd
));
17012 gdb_assert (HOST_CHAR_BIT
== 8);
17013 if (sect
->buffer
[str_offset
] == '\0')
17015 return (const char *) (sect
->buffer
+ str_offset
);
17018 /* Return pointer to string at .debug_str offset STR_OFFSET. */
17020 static const char *
17021 read_indirect_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
17023 return read_indirect_string_at_offset_from (abfd
, str_offset
,
17024 &dwarf2_per_objfile
->str
,
17025 "DW_FORM_strp", ".debug_str");
17028 /* Return pointer to string at .debug_line_str offset STR_OFFSET. */
17030 static const char *
17031 read_indirect_line_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
17033 return read_indirect_string_at_offset_from (abfd
, str_offset
,
17034 &dwarf2_per_objfile
->line_str
,
17035 "DW_FORM_line_strp",
17036 ".debug_line_str");
17039 /* Read a string at offset STR_OFFSET in the .debug_str section from
17040 the .dwz file DWZ. Throw an error if the offset is too large. If
17041 the string consists of a single NUL byte, return NULL; otherwise
17042 return a pointer to the string. */
17044 static const char *
17045 read_indirect_string_from_dwz (struct dwz_file
*dwz
, LONGEST str_offset
)
17047 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwz
->str
);
17049 if (dwz
->str
.buffer
== NULL
)
17050 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
17051 "section [in module %s]"),
17052 bfd_get_filename (dwz
->dwz_bfd
));
17053 if (str_offset
>= dwz
->str
.size
)
17054 error (_("DW_FORM_GNU_strp_alt pointing outside of "
17055 ".debug_str section [in module %s]"),
17056 bfd_get_filename (dwz
->dwz_bfd
));
17057 gdb_assert (HOST_CHAR_BIT
== 8);
17058 if (dwz
->str
.buffer
[str_offset
] == '\0')
17060 return (const char *) (dwz
->str
.buffer
+ str_offset
);
17063 /* Return pointer to string at .debug_str offset as read from BUF.
17064 BUF is assumed to be in a compilation unit described by CU_HEADER.
17065 Return *BYTES_READ_PTR count of bytes read from BUF. */
17067 static const char *
17068 read_indirect_string (bfd
*abfd
, const gdb_byte
*buf
,
17069 const struct comp_unit_head
*cu_header
,
17070 unsigned int *bytes_read_ptr
)
17072 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
17074 return read_indirect_string_at_offset (abfd
, str_offset
);
17077 /* Return pointer to string at .debug_line_str offset as read from BUF.
17078 BUF is assumed to be in a compilation unit described by CU_HEADER.
17079 Return *BYTES_READ_PTR count of bytes read from BUF. */
17081 static const char *
17082 read_indirect_line_string (bfd
*abfd
, const gdb_byte
*buf
,
17083 const struct comp_unit_head
*cu_header
,
17084 unsigned int *bytes_read_ptr
)
17086 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
17088 return read_indirect_line_string_at_offset (abfd
, str_offset
);
17092 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
17093 unsigned int *bytes_read_ptr
)
17096 unsigned int num_read
;
17098 unsigned char byte
;
17105 byte
= bfd_get_8 (abfd
, buf
);
17108 result
|= ((ULONGEST
) (byte
& 127) << shift
);
17109 if ((byte
& 128) == 0)
17115 *bytes_read_ptr
= num_read
;
17120 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
17121 unsigned int *bytes_read_ptr
)
17124 int shift
, num_read
;
17125 unsigned char byte
;
17132 byte
= bfd_get_8 (abfd
, buf
);
17135 result
|= ((LONGEST
) (byte
& 127) << shift
);
17137 if ((byte
& 128) == 0)
17142 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
17143 result
|= -(((LONGEST
) 1) << shift
);
17144 *bytes_read_ptr
= num_read
;
17148 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
17149 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
17150 ADDR_SIZE is the size of addresses from the CU header. */
17153 read_addr_index_1 (unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
17155 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
17156 bfd
*abfd
= objfile
->obfd
;
17157 const gdb_byte
*info_ptr
;
17159 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
17160 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
17161 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
17162 objfile_name (objfile
));
17163 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
17164 error (_("DW_FORM_addr_index pointing outside of "
17165 ".debug_addr section [in module %s]"),
17166 objfile_name (objfile
));
17167 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
17168 + addr_base
+ addr_index
* addr_size
);
17169 if (addr_size
== 4)
17170 return bfd_get_32 (abfd
, info_ptr
);
17172 return bfd_get_64 (abfd
, info_ptr
);
17175 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
17178 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
17180 return read_addr_index_1 (addr_index
, cu
->addr_base
, cu
->header
.addr_size
);
17183 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
17186 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
17187 unsigned int *bytes_read
)
17189 bfd
*abfd
= cu
->objfile
->obfd
;
17190 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
17192 return read_addr_index (cu
, addr_index
);
17195 /* Data structure to pass results from dwarf2_read_addr_index_reader
17196 back to dwarf2_read_addr_index. */
17198 struct dwarf2_read_addr_index_data
17200 ULONGEST addr_base
;
17204 /* die_reader_func for dwarf2_read_addr_index. */
17207 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
17208 const gdb_byte
*info_ptr
,
17209 struct die_info
*comp_unit_die
,
17213 struct dwarf2_cu
*cu
= reader
->cu
;
17214 struct dwarf2_read_addr_index_data
*aidata
=
17215 (struct dwarf2_read_addr_index_data
*) data
;
17217 aidata
->addr_base
= cu
->addr_base
;
17218 aidata
->addr_size
= cu
->header
.addr_size
;
17221 /* Given an index in .debug_addr, fetch the value.
17222 NOTE: This can be called during dwarf expression evaluation,
17223 long after the debug information has been read, and thus per_cu->cu
17224 may no longer exist. */
17227 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
17228 unsigned int addr_index
)
17230 struct objfile
*objfile
= per_cu
->objfile
;
17231 struct dwarf2_cu
*cu
= per_cu
->cu
;
17232 ULONGEST addr_base
;
17235 /* This is intended to be called from outside this file. */
17236 dw2_setup (objfile
);
17238 /* We need addr_base and addr_size.
17239 If we don't have PER_CU->cu, we have to get it.
17240 Nasty, but the alternative is storing the needed info in PER_CU,
17241 which at this point doesn't seem justified: it's not clear how frequently
17242 it would get used and it would increase the size of every PER_CU.
17243 Entry points like dwarf2_per_cu_addr_size do a similar thing
17244 so we're not in uncharted territory here.
17245 Alas we need to be a bit more complicated as addr_base is contained
17248 We don't need to read the entire CU(/TU).
17249 We just need the header and top level die.
17251 IWBN to use the aging mechanism to let us lazily later discard the CU.
17252 For now we skip this optimization. */
17256 addr_base
= cu
->addr_base
;
17257 addr_size
= cu
->header
.addr_size
;
17261 struct dwarf2_read_addr_index_data aidata
;
17263 /* Note: We can't use init_cutu_and_read_dies_simple here,
17264 we need addr_base. */
17265 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
17266 dwarf2_read_addr_index_reader
, &aidata
);
17267 addr_base
= aidata
.addr_base
;
17268 addr_size
= aidata
.addr_size
;
17271 return read_addr_index_1 (addr_index
, addr_base
, addr_size
);
17274 /* Given a DW_FORM_GNU_str_index, fetch the string.
17275 This is only used by the Fission support. */
17277 static const char *
17278 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
17280 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
17281 const char *objf_name
= objfile_name (objfile
);
17282 bfd
*abfd
= objfile
->obfd
;
17283 struct dwarf2_cu
*cu
= reader
->cu
;
17284 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
17285 struct dwarf2_section_info
*str_offsets_section
=
17286 &reader
->dwo_file
->sections
.str_offsets
;
17287 const gdb_byte
*info_ptr
;
17288 ULONGEST str_offset
;
17289 static const char form_name
[] = "DW_FORM_GNU_str_index";
17291 dwarf2_read_section (objfile
, str_section
);
17292 dwarf2_read_section (objfile
, str_offsets_section
);
17293 if (str_section
->buffer
== NULL
)
17294 error (_("%s used without .debug_str.dwo section"
17295 " in CU at offset 0x%lx [in module %s]"),
17296 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
17297 if (str_offsets_section
->buffer
== NULL
)
17298 error (_("%s used without .debug_str_offsets.dwo section"
17299 " in CU at offset 0x%lx [in module %s]"),
17300 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
17301 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
17302 error (_("%s pointing outside of .debug_str_offsets.dwo"
17303 " section in CU at offset 0x%lx [in module %s]"),
17304 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
17305 info_ptr
= (str_offsets_section
->buffer
17306 + str_index
* cu
->header
.offset_size
);
17307 if (cu
->header
.offset_size
== 4)
17308 str_offset
= bfd_get_32 (abfd
, info_ptr
);
17310 str_offset
= bfd_get_64 (abfd
, info_ptr
);
17311 if (str_offset
>= str_section
->size
)
17312 error (_("Offset from %s pointing outside of"
17313 " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"),
17314 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
17315 return (const char *) (str_section
->buffer
+ str_offset
);
17318 /* Return the length of an LEB128 number in BUF. */
17321 leb128_size (const gdb_byte
*buf
)
17323 const gdb_byte
*begin
= buf
;
17329 if ((byte
& 128) == 0)
17330 return buf
- begin
;
17335 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
17344 cu
->language
= language_c
;
17347 case DW_LANG_C_plus_plus
:
17348 case DW_LANG_C_plus_plus_11
:
17349 case DW_LANG_C_plus_plus_14
:
17350 cu
->language
= language_cplus
;
17353 cu
->language
= language_d
;
17355 case DW_LANG_Fortran77
:
17356 case DW_LANG_Fortran90
:
17357 case DW_LANG_Fortran95
:
17358 case DW_LANG_Fortran03
:
17359 case DW_LANG_Fortran08
:
17360 cu
->language
= language_fortran
;
17363 cu
->language
= language_go
;
17365 case DW_LANG_Mips_Assembler
:
17366 cu
->language
= language_asm
;
17368 case DW_LANG_Ada83
:
17369 case DW_LANG_Ada95
:
17370 cu
->language
= language_ada
;
17372 case DW_LANG_Modula2
:
17373 cu
->language
= language_m2
;
17375 case DW_LANG_Pascal83
:
17376 cu
->language
= language_pascal
;
17379 cu
->language
= language_objc
;
17382 case DW_LANG_Rust_old
:
17383 cu
->language
= language_rust
;
17385 case DW_LANG_Cobol74
:
17386 case DW_LANG_Cobol85
:
17388 cu
->language
= language_minimal
;
17391 cu
->language_defn
= language_def (cu
->language
);
17394 /* Return the named attribute or NULL if not there. */
17396 static struct attribute
*
17397 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
17402 struct attribute
*spec
= NULL
;
17404 for (i
= 0; i
< die
->num_attrs
; ++i
)
17406 if (die
->attrs
[i
].name
== name
)
17407 return &die
->attrs
[i
];
17408 if (die
->attrs
[i
].name
== DW_AT_specification
17409 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
17410 spec
= &die
->attrs
[i
];
17416 die
= follow_die_ref (die
, spec
, &cu
);
17422 /* Return the named attribute or NULL if not there,
17423 but do not follow DW_AT_specification, etc.
17424 This is for use in contexts where we're reading .debug_types dies.
17425 Following DW_AT_specification, DW_AT_abstract_origin will take us
17426 back up the chain, and we want to go down. */
17428 static struct attribute
*
17429 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
17433 for (i
= 0; i
< die
->num_attrs
; ++i
)
17434 if (die
->attrs
[i
].name
== name
)
17435 return &die
->attrs
[i
];
17440 /* Return the string associated with a string-typed attribute, or NULL if it
17441 is either not found or is of an incorrect type. */
17443 static const char *
17444 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
17446 struct attribute
*attr
;
17447 const char *str
= NULL
;
17449 attr
= dwarf2_attr (die
, name
, cu
);
17453 if (attr
->form
== DW_FORM_strp
|| attr
->form
== DW_FORM_line_strp
17454 || attr
->form
== DW_FORM_string
|| attr
->form
== DW_FORM_GNU_strp_alt
)
17455 str
= DW_STRING (attr
);
17457 complaint (&symfile_complaints
,
17458 _("string type expected for attribute %s for "
17459 "DIE at 0x%x in module %s"),
17460 dwarf_attr_name (name
), die
->offset
.sect_off
,
17461 objfile_name (cu
->objfile
));
17467 /* Return non-zero iff the attribute NAME is defined for the given DIE,
17468 and holds a non-zero value. This function should only be used for
17469 DW_FORM_flag or DW_FORM_flag_present attributes. */
17472 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
17474 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
17476 return (attr
&& DW_UNSND (attr
));
17480 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
17482 /* A DIE is a declaration if it has a DW_AT_declaration attribute
17483 which value is non-zero. However, we have to be careful with
17484 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
17485 (via dwarf2_flag_true_p) follows this attribute. So we may
17486 end up accidently finding a declaration attribute that belongs
17487 to a different DIE referenced by the specification attribute,
17488 even though the given DIE does not have a declaration attribute. */
17489 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
17490 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
17493 /* Return the die giving the specification for DIE, if there is
17494 one. *SPEC_CU is the CU containing DIE on input, and the CU
17495 containing the return value on output. If there is no
17496 specification, but there is an abstract origin, that is
17499 static struct die_info
*
17500 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
17502 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
17505 if (spec_attr
== NULL
)
17506 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
17508 if (spec_attr
== NULL
)
17511 return follow_die_ref (die
, spec_attr
, spec_cu
);
17514 /* Free the line_header structure *LH, and any arrays and strings it
17516 NOTE: This is also used as a "cleanup" function. */
17519 free_line_header (struct line_header
*lh
)
17521 if (lh
->standard_opcode_lengths
)
17522 xfree (lh
->standard_opcode_lengths
);
17524 /* Remember that all the lh->file_names[i].name pointers are
17525 pointers into debug_line_buffer, and don't need to be freed. */
17526 if (lh
->file_names
)
17527 xfree (lh
->file_names
);
17529 /* Similarly for the include directory names. */
17530 if (lh
->include_dirs
)
17531 xfree (lh
->include_dirs
);
17536 /* Stub for free_line_header to match void * callback types. */
17539 free_line_header_voidp (void *arg
)
17541 struct line_header
*lh
= (struct line_header
*) arg
;
17543 free_line_header (lh
);
17546 /* Add an entry to LH's include directory table. */
17549 add_include_dir (struct line_header
*lh
, const char *include_dir
)
17551 if (dwarf_line_debug
>= 2)
17552 fprintf_unfiltered (gdb_stdlog
, "Adding dir %u: %s\n",
17553 lh
->num_include_dirs
+ 1, include_dir
);
17555 /* Grow the array if necessary. */
17556 if (lh
->include_dirs_size
== 0)
17558 lh
->include_dirs_size
= 1; /* for testing */
17559 lh
->include_dirs
= XNEWVEC (const char *, lh
->include_dirs_size
);
17561 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
17563 lh
->include_dirs_size
*= 2;
17564 lh
->include_dirs
= XRESIZEVEC (const char *, lh
->include_dirs
,
17565 lh
->include_dirs_size
);
17568 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
17571 /* Add an entry to LH's file name table. */
17574 add_file_name (struct line_header
*lh
,
17576 unsigned int dir_index
,
17577 unsigned int mod_time
,
17578 unsigned int length
)
17580 struct file_entry
*fe
;
17582 if (dwarf_line_debug
>= 2)
17583 fprintf_unfiltered (gdb_stdlog
, "Adding file %u: %s\n",
17584 lh
->num_file_names
+ 1, name
);
17586 /* Grow the array if necessary. */
17587 if (lh
->file_names_size
== 0)
17589 lh
->file_names_size
= 1; /* for testing */
17590 lh
->file_names
= XNEWVEC (struct file_entry
, lh
->file_names_size
);
17592 else if (lh
->num_file_names
>= lh
->file_names_size
)
17594 lh
->file_names_size
*= 2;
17596 = XRESIZEVEC (struct file_entry
, lh
->file_names
, lh
->file_names_size
);
17599 fe
= &lh
->file_names
[lh
->num_file_names
++];
17601 fe
->dir_index
= dir_index
;
17602 fe
->mod_time
= mod_time
;
17603 fe
->length
= length
;
17604 fe
->included_p
= 0;
17608 /* A convenience function to find the proper .debug_line section for a CU. */
17610 static struct dwarf2_section_info
*
17611 get_debug_line_section (struct dwarf2_cu
*cu
)
17613 struct dwarf2_section_info
*section
;
17615 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
17617 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
17618 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
17619 else if (cu
->per_cu
->is_dwz
)
17621 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
17623 section
= &dwz
->line
;
17626 section
= &dwarf2_per_objfile
->line
;
17631 /* Forwarding function for read_formatted_entries. */
17634 add_include_dir_stub (struct line_header
*lh
, const char *name
,
17635 unsigned int dir_index
, unsigned int mod_time
,
17636 unsigned int length
)
17638 add_include_dir (lh
, name
);
17641 /* Read directory or file name entry format, starting with byte of
17642 format count entries, ULEB128 pairs of entry formats, ULEB128 of
17643 entries count and the entries themselves in the described entry
17647 read_formatted_entries (bfd
*abfd
, const gdb_byte
**bufp
,
17648 struct line_header
*lh
,
17649 const struct comp_unit_head
*cu_header
,
17650 void (*callback
) (struct line_header
*lh
,
17652 unsigned int dir_index
,
17653 unsigned int mod_time
,
17654 unsigned int length
))
17656 gdb_byte format_count
, formati
;
17657 ULONGEST data_count
, datai
;
17658 const gdb_byte
*buf
= *bufp
;
17659 const gdb_byte
*format_header_data
;
17661 unsigned int bytes_read
;
17663 format_count
= read_1_byte (abfd
, buf
);
17665 format_header_data
= buf
;
17666 for (formati
= 0; formati
< format_count
; formati
++)
17668 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
17670 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
17674 data_count
= read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
17676 for (datai
= 0; datai
< data_count
; datai
++)
17678 const gdb_byte
*format
= format_header_data
;
17679 struct file_entry fe
;
17681 memset (&fe
, 0, sizeof (fe
));
17683 for (formati
= 0; formati
< format_count
; formati
++)
17685 ULONGEST content_type
, form
;
17686 const char *string_trash
;
17687 const char **stringp
= &string_trash
;
17688 unsigned int uint_trash
, *uintp
= &uint_trash
;
17690 content_type
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
17691 format
+= bytes_read
;
17692 switch (content_type
)
17695 stringp
= &fe
.name
;
17697 case DW_LNCT_directory_index
:
17698 uintp
= &fe
.dir_index
;
17700 case DW_LNCT_timestamp
:
17701 uintp
= &fe
.mod_time
;
17704 uintp
= &fe
.length
;
17709 complaint (&symfile_complaints
,
17710 _("Unknown format content type %s"),
17711 pulongest (content_type
));
17714 form
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
17715 format
+= bytes_read
;
17718 case DW_FORM_string
:
17719 *stringp
= read_direct_string (abfd
, buf
, &bytes_read
);
17723 case DW_FORM_line_strp
:
17724 *stringp
= read_indirect_line_string (abfd
, buf
, cu_header
, &bytes_read
);
17728 case DW_FORM_data1
:
17729 *uintp
= read_1_byte (abfd
, buf
);
17733 case DW_FORM_data2
:
17734 *uintp
= read_2_bytes (abfd
, buf
);
17738 case DW_FORM_data4
:
17739 *uintp
= read_4_bytes (abfd
, buf
);
17743 case DW_FORM_data8
:
17744 *uintp
= read_8_bytes (abfd
, buf
);
17748 case DW_FORM_udata
:
17749 *uintp
= read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
17753 case DW_FORM_block
:
17754 /* It is valid only for DW_LNCT_timestamp which is ignored by
17760 callback (lh
, fe
.name
, fe
.dir_index
, fe
.mod_time
, fe
.length
);
17766 /* Read the statement program header starting at OFFSET in
17767 .debug_line, or .debug_line.dwo. Return a pointer
17768 to a struct line_header, allocated using xmalloc.
17769 Returns NULL if there is a problem reading the header, e.g., if it
17770 has a version we don't understand.
17772 NOTE: the strings in the include directory and file name tables of
17773 the returned object point into the dwarf line section buffer,
17774 and must not be freed. */
17776 static struct line_header
*
17777 dwarf_decode_line_header (unsigned int offset
, struct dwarf2_cu
*cu
)
17779 struct cleanup
*back_to
;
17780 struct line_header
*lh
;
17781 const gdb_byte
*line_ptr
;
17782 unsigned int bytes_read
, offset_size
;
17784 const char *cur_dir
, *cur_file
;
17785 struct dwarf2_section_info
*section
;
17788 section
= get_debug_line_section (cu
);
17789 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
17790 if (section
->buffer
== NULL
)
17792 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
17793 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
17795 complaint (&symfile_complaints
, _("missing .debug_line section"));
17799 /* We can't do this until we know the section is non-empty.
17800 Only then do we know we have such a section. */
17801 abfd
= get_section_bfd_owner (section
);
17803 /* Make sure that at least there's room for the total_length field.
17804 That could be 12 bytes long, but we're just going to fudge that. */
17805 if (offset
+ 4 >= section
->size
)
17807 dwarf2_statement_list_fits_in_line_number_section_complaint ();
17811 lh
= XNEW (struct line_header
);
17812 memset (lh
, 0, sizeof (*lh
));
17813 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
17816 lh
->offset
.sect_off
= offset
;
17817 lh
->offset_in_dwz
= cu
->per_cu
->is_dwz
;
17819 line_ptr
= section
->buffer
+ offset
;
17821 /* Read in the header. */
17823 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
17824 &bytes_read
, &offset_size
);
17825 line_ptr
+= bytes_read
;
17826 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
17828 dwarf2_statement_list_fits_in_line_number_section_complaint ();
17829 do_cleanups (back_to
);
17832 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
17833 lh
->version
= read_2_bytes (abfd
, line_ptr
);
17835 if (lh
->version
> 5)
17837 /* This is a version we don't understand. The format could have
17838 changed in ways we don't handle properly so just punt. */
17839 complaint (&symfile_complaints
,
17840 _("unsupported version in .debug_line section"));
17843 if (lh
->version
>= 5)
17845 gdb_byte segment_selector_size
;
17847 /* Skip address size. */
17848 read_1_byte (abfd
, line_ptr
);
17851 segment_selector_size
= read_1_byte (abfd
, line_ptr
);
17853 if (segment_selector_size
!= 0)
17855 complaint (&symfile_complaints
,
17856 _("unsupported segment selector size %u "
17857 "in .debug_line section"),
17858 segment_selector_size
);
17862 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
17863 line_ptr
+= offset_size
;
17864 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
17866 if (lh
->version
>= 4)
17868 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
17872 lh
->maximum_ops_per_instruction
= 1;
17874 if (lh
->maximum_ops_per_instruction
== 0)
17876 lh
->maximum_ops_per_instruction
= 1;
17877 complaint (&symfile_complaints
,
17878 _("invalid maximum_ops_per_instruction "
17879 "in `.debug_line' section"));
17882 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
17884 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
17886 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
17888 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
17890 lh
->standard_opcode_lengths
= XNEWVEC (unsigned char, lh
->opcode_base
);
17892 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
17893 for (i
= 1; i
< lh
->opcode_base
; ++i
)
17895 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
17899 if (lh
->version
>= 5)
17901 /* Read directory table. */
17902 read_formatted_entries (abfd
, &line_ptr
, lh
, &cu
->header
,
17903 add_include_dir_stub
);
17905 /* Read file name table. */
17906 read_formatted_entries (abfd
, &line_ptr
, lh
, &cu
->header
, add_file_name
);
17910 /* Read directory table. */
17911 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
17913 line_ptr
+= bytes_read
;
17914 add_include_dir (lh
, cur_dir
);
17916 line_ptr
+= bytes_read
;
17918 /* Read file name table. */
17919 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
17921 unsigned int dir_index
, mod_time
, length
;
17923 line_ptr
+= bytes_read
;
17924 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17925 line_ptr
+= bytes_read
;
17926 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17927 line_ptr
+= bytes_read
;
17928 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17929 line_ptr
+= bytes_read
;
17931 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
17933 line_ptr
+= bytes_read
;
17935 lh
->statement_program_start
= line_ptr
;
17937 if (line_ptr
> (section
->buffer
+ section
->size
))
17938 complaint (&symfile_complaints
,
17939 _("line number info header doesn't "
17940 "fit in `.debug_line' section"));
17942 discard_cleanups (back_to
);
17946 /* Subroutine of dwarf_decode_lines to simplify it.
17947 Return the file name of the psymtab for included file FILE_INDEX
17948 in line header LH of PST.
17949 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
17950 If space for the result is malloc'd, it will be freed by a cleanup.
17951 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename.
17953 The function creates dangling cleanup registration. */
17955 static const char *
17956 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
17957 const struct partial_symtab
*pst
,
17958 const char *comp_dir
)
17960 const struct file_entry fe
= lh
->file_names
[file_index
];
17961 const char *include_name
= fe
.name
;
17962 const char *include_name_to_compare
= include_name
;
17963 const char *dir_name
= NULL
;
17964 const char *pst_filename
;
17965 char *copied_name
= NULL
;
17968 if (fe
.dir_index
&& lh
->include_dirs
!= NULL
)
17969 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
17971 if (!IS_ABSOLUTE_PATH (include_name
)
17972 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
17974 /* Avoid creating a duplicate psymtab for PST.
17975 We do this by comparing INCLUDE_NAME and PST_FILENAME.
17976 Before we do the comparison, however, we need to account
17977 for DIR_NAME and COMP_DIR.
17978 First prepend dir_name (if non-NULL). If we still don't
17979 have an absolute path prepend comp_dir (if non-NULL).
17980 However, the directory we record in the include-file's
17981 psymtab does not contain COMP_DIR (to match the
17982 corresponding symtab(s)).
17987 bash$ gcc -g ./hello.c
17988 include_name = "hello.c"
17990 DW_AT_comp_dir = comp_dir = "/tmp"
17991 DW_AT_name = "./hello.c"
17995 if (dir_name
!= NULL
)
17997 char *tem
= concat (dir_name
, SLASH_STRING
,
17998 include_name
, (char *)NULL
);
18000 make_cleanup (xfree
, tem
);
18001 include_name
= tem
;
18002 include_name_to_compare
= include_name
;
18004 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
18006 char *tem
= concat (comp_dir
, SLASH_STRING
,
18007 include_name
, (char *)NULL
);
18009 make_cleanup (xfree
, tem
);
18010 include_name_to_compare
= tem
;
18014 pst_filename
= pst
->filename
;
18015 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
18017 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
18018 pst_filename
, (char *)NULL
);
18019 pst_filename
= copied_name
;
18022 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
18024 if (copied_name
!= NULL
)
18025 xfree (copied_name
);
18029 return include_name
;
18032 /* State machine to track the state of the line number program. */
18036 /* These are part of the standard DWARF line number state machine. */
18038 unsigned char op_index
;
18043 unsigned int discriminator
;
18045 /* Additional bits of state we need to track. */
18047 /* The last file that we called dwarf2_start_subfile for.
18048 This is only used for TLLs. */
18049 unsigned int last_file
;
18050 /* The last file a line number was recorded for. */
18051 struct subfile
*last_subfile
;
18053 /* The function to call to record a line. */
18054 record_line_ftype
*record_line
;
18056 /* The last line number that was recorded, used to coalesce
18057 consecutive entries for the same line. This can happen, for
18058 example, when discriminators are present. PR 17276. */
18059 unsigned int last_line
;
18060 int line_has_non_zero_discriminator
;
18061 } lnp_state_machine
;
18063 /* There's a lot of static state to pass to dwarf_record_line.
18064 This keeps it all together. */
18069 struct gdbarch
*gdbarch
;
18071 /* The line number header. */
18072 struct line_header
*line_header
;
18074 /* Non-zero if we're recording lines.
18075 Otherwise we're building partial symtabs and are just interested in
18076 finding include files mentioned by the line number program. */
18077 int record_lines_p
;
18078 } lnp_reader_state
;
18080 /* Ignore this record_line request. */
18083 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
18088 /* Return non-zero if we should add LINE to the line number table.
18089 LINE is the line to add, LAST_LINE is the last line that was added,
18090 LAST_SUBFILE is the subfile for LAST_LINE.
18091 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
18092 had a non-zero discriminator.
18094 We have to be careful in the presence of discriminators.
18095 E.g., for this line:
18097 for (i = 0; i < 100000; i++);
18099 clang can emit four line number entries for that one line,
18100 each with a different discriminator.
18101 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
18103 However, we want gdb to coalesce all four entries into one.
18104 Otherwise the user could stepi into the middle of the line and
18105 gdb would get confused about whether the pc really was in the
18106 middle of the line.
18108 Things are further complicated by the fact that two consecutive
18109 line number entries for the same line is a heuristic used by gcc
18110 to denote the end of the prologue. So we can't just discard duplicate
18111 entries, we have to be selective about it. The heuristic we use is
18112 that we only collapse consecutive entries for the same line if at least
18113 one of those entries has a non-zero discriminator. PR 17276.
18115 Note: Addresses in the line number state machine can never go backwards
18116 within one sequence, thus this coalescing is ok. */
18119 dwarf_record_line_p (unsigned int line
, unsigned int last_line
,
18120 int line_has_non_zero_discriminator
,
18121 struct subfile
*last_subfile
)
18123 if (current_subfile
!= last_subfile
)
18125 if (line
!= last_line
)
18127 /* Same line for the same file that we've seen already.
18128 As a last check, for pr 17276, only record the line if the line
18129 has never had a non-zero discriminator. */
18130 if (!line_has_non_zero_discriminator
)
18135 /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS
18136 in the line table of subfile SUBFILE. */
18139 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
18140 unsigned int line
, CORE_ADDR address
,
18141 record_line_ftype p_record_line
)
18143 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
18145 if (dwarf_line_debug
)
18147 fprintf_unfiltered (gdb_stdlog
,
18148 "Recording line %u, file %s, address %s\n",
18149 line
, lbasename (subfile
->name
),
18150 paddress (gdbarch
, address
));
18153 (*p_record_line
) (subfile
, line
, addr
);
18156 /* Subroutine of dwarf_decode_lines_1 to simplify it.
18157 Mark the end of a set of line number records.
18158 The arguments are the same as for dwarf_record_line_1.
18159 If SUBFILE is NULL the request is ignored. */
18162 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
18163 CORE_ADDR address
, record_line_ftype p_record_line
)
18165 if (subfile
== NULL
)
18168 if (dwarf_line_debug
)
18170 fprintf_unfiltered (gdb_stdlog
,
18171 "Finishing current line, file %s, address %s\n",
18172 lbasename (subfile
->name
),
18173 paddress (gdbarch
, address
));
18176 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, p_record_line
);
18179 /* Record the line in STATE.
18180 END_SEQUENCE is non-zero if we're processing the end of a sequence. */
18183 dwarf_record_line (lnp_reader_state
*reader
, lnp_state_machine
*state
,
18186 const struct line_header
*lh
= reader
->line_header
;
18187 unsigned int file
, line
, discriminator
;
18190 file
= state
->file
;
18191 line
= state
->line
;
18192 is_stmt
= state
->is_stmt
;
18193 discriminator
= state
->discriminator
;
18195 if (dwarf_line_debug
)
18197 fprintf_unfiltered (gdb_stdlog
,
18198 "Processing actual line %u: file %u,"
18199 " address %s, is_stmt %u, discrim %u\n",
18201 paddress (reader
->gdbarch
, state
->address
),
18202 is_stmt
, discriminator
);
18205 if (file
== 0 || file
- 1 >= lh
->num_file_names
)
18206 dwarf2_debug_line_missing_file_complaint ();
18207 /* For now we ignore lines not starting on an instruction boundary.
18208 But not when processing end_sequence for compatibility with the
18209 previous version of the code. */
18210 else if (state
->op_index
== 0 || end_sequence
)
18212 lh
->file_names
[file
- 1].included_p
= 1;
18213 if (reader
->record_lines_p
&& is_stmt
)
18215 if (state
->last_subfile
!= current_subfile
|| end_sequence
)
18217 dwarf_finish_line (reader
->gdbarch
, state
->last_subfile
,
18218 state
->address
, state
->record_line
);
18223 if (dwarf_record_line_p (line
, state
->last_line
,
18224 state
->line_has_non_zero_discriminator
,
18225 state
->last_subfile
))
18227 dwarf_record_line_1 (reader
->gdbarch
, current_subfile
,
18228 line
, state
->address
,
18229 state
->record_line
);
18231 state
->last_subfile
= current_subfile
;
18232 state
->last_line
= line
;
18238 /* Initialize STATE for the start of a line number program. */
18241 init_lnp_state_machine (lnp_state_machine
*state
,
18242 const lnp_reader_state
*reader
)
18244 memset (state
, 0, sizeof (*state
));
18246 /* Just starting, there is no "last file". */
18247 state
->last_file
= 0;
18248 state
->last_subfile
= NULL
;
18250 state
->record_line
= record_line
;
18252 state
->last_line
= 0;
18253 state
->line_has_non_zero_discriminator
= 0;
18255 /* Initialize these according to the DWARF spec. */
18256 state
->op_index
= 0;
18259 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
18260 was a line entry for it so that the backend has a chance to adjust it
18261 and also record it in case it needs it. This is currently used by MIPS
18262 code, cf. `mips_adjust_dwarf2_line'. */
18263 state
->address
= gdbarch_adjust_dwarf2_line (reader
->gdbarch
, 0, 0);
18264 state
->is_stmt
= reader
->line_header
->default_is_stmt
;
18265 state
->discriminator
= 0;
18268 /* Check address and if invalid nop-out the rest of the lines in this
18272 check_line_address (struct dwarf2_cu
*cu
, lnp_state_machine
*state
,
18273 const gdb_byte
*line_ptr
,
18274 CORE_ADDR lowpc
, CORE_ADDR address
)
18276 /* If address < lowpc then it's not a usable value, it's outside the
18277 pc range of the CU. However, we restrict the test to only address
18278 values of zero to preserve GDB's previous behaviour which is to
18279 handle the specific case of a function being GC'd by the linker. */
18281 if (address
== 0 && address
< lowpc
)
18283 /* This line table is for a function which has been
18284 GCd by the linker. Ignore it. PR gdb/12528 */
18286 struct objfile
*objfile
= cu
->objfile
;
18287 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
18289 complaint (&symfile_complaints
,
18290 _(".debug_line address at offset 0x%lx is 0 [in module %s]"),
18291 line_offset
, objfile_name (objfile
));
18292 state
->record_line
= noop_record_line
;
18293 /* Note: sm.record_line is left as noop_record_line
18294 until we see DW_LNE_end_sequence. */
18298 /* Subroutine of dwarf_decode_lines to simplify it.
18299 Process the line number information in LH.
18300 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
18301 program in order to set included_p for every referenced header. */
18304 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
18305 const int decode_for_pst_p
, CORE_ADDR lowpc
)
18307 const gdb_byte
*line_ptr
, *extended_end
;
18308 const gdb_byte
*line_end
;
18309 unsigned int bytes_read
, extended_len
;
18310 unsigned char op_code
, extended_op
;
18311 CORE_ADDR baseaddr
;
18312 struct objfile
*objfile
= cu
->objfile
;
18313 bfd
*abfd
= objfile
->obfd
;
18314 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18315 /* Non-zero if we're recording line info (as opposed to building partial
18317 int record_lines_p
= !decode_for_pst_p
;
18318 /* A collection of things we need to pass to dwarf_record_line. */
18319 lnp_reader_state reader_state
;
18321 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
18323 line_ptr
= lh
->statement_program_start
;
18324 line_end
= lh
->statement_program_end
;
18326 reader_state
.gdbarch
= gdbarch
;
18327 reader_state
.line_header
= lh
;
18328 reader_state
.record_lines_p
= record_lines_p
;
18330 /* Read the statement sequences until there's nothing left. */
18331 while (line_ptr
< line_end
)
18333 /* The DWARF line number program state machine. */
18334 lnp_state_machine state_machine
;
18335 int end_sequence
= 0;
18337 /* Reset the state machine at the start of each sequence. */
18338 init_lnp_state_machine (&state_machine
, &reader_state
);
18340 if (record_lines_p
&& lh
->num_file_names
>= state_machine
.file
)
18342 /* Start a subfile for the current file of the state machine. */
18343 /* lh->include_dirs and lh->file_names are 0-based, but the
18344 directory and file name numbers in the statement program
18346 struct file_entry
*fe
= &lh
->file_names
[state_machine
.file
- 1];
18347 const char *dir
= NULL
;
18349 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
18350 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
18352 dwarf2_start_subfile (fe
->name
, dir
);
18355 /* Decode the table. */
18356 while (line_ptr
< line_end
&& !end_sequence
)
18358 op_code
= read_1_byte (abfd
, line_ptr
);
18361 if (op_code
>= lh
->opcode_base
)
18363 /* Special opcode. */
18364 unsigned char adj_opcode
;
18365 CORE_ADDR addr_adj
;
18368 adj_opcode
= op_code
- lh
->opcode_base
;
18369 addr_adj
= (((state_machine
.op_index
18370 + (adj_opcode
/ lh
->line_range
))
18371 / lh
->maximum_ops_per_instruction
)
18372 * lh
->minimum_instruction_length
);
18373 state_machine
.address
18374 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
18375 state_machine
.op_index
= ((state_machine
.op_index
18376 + (adj_opcode
/ lh
->line_range
))
18377 % lh
->maximum_ops_per_instruction
);
18378 line_delta
= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
18379 state_machine
.line
+= line_delta
;
18380 if (line_delta
!= 0)
18381 state_machine
.line_has_non_zero_discriminator
18382 = state_machine
.discriminator
!= 0;
18384 dwarf_record_line (&reader_state
, &state_machine
, 0);
18385 state_machine
.discriminator
= 0;
18387 else switch (op_code
)
18389 case DW_LNS_extended_op
:
18390 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
18392 line_ptr
+= bytes_read
;
18393 extended_end
= line_ptr
+ extended_len
;
18394 extended_op
= read_1_byte (abfd
, line_ptr
);
18396 switch (extended_op
)
18398 case DW_LNE_end_sequence
:
18399 state_machine
.record_line
= record_line
;
18402 case DW_LNE_set_address
:
18405 = read_address (abfd
, line_ptr
, cu
, &bytes_read
);
18407 line_ptr
+= bytes_read
;
18408 check_line_address (cu
, &state_machine
, line_ptr
,
18410 state_machine
.op_index
= 0;
18411 address
+= baseaddr
;
18412 state_machine
.address
18413 = gdbarch_adjust_dwarf2_line (gdbarch
, address
, 0);
18416 case DW_LNE_define_file
:
18418 const char *cur_file
;
18419 unsigned int dir_index
, mod_time
, length
;
18421 cur_file
= read_direct_string (abfd
, line_ptr
,
18423 line_ptr
+= bytes_read
;
18425 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18426 line_ptr
+= bytes_read
;
18428 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18429 line_ptr
+= bytes_read
;
18431 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18432 line_ptr
+= bytes_read
;
18433 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
18436 case DW_LNE_set_discriminator
:
18437 /* The discriminator is not interesting to the debugger;
18438 just ignore it. We still need to check its value though:
18439 if there are consecutive entries for the same
18440 (non-prologue) line we want to coalesce them.
18442 state_machine
.discriminator
18443 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18444 state_machine
.line_has_non_zero_discriminator
18445 |= state_machine
.discriminator
!= 0;
18446 line_ptr
+= bytes_read
;
18449 complaint (&symfile_complaints
,
18450 _("mangled .debug_line section"));
18453 /* Make sure that we parsed the extended op correctly. If e.g.
18454 we expected a different address size than the producer used,
18455 we may have read the wrong number of bytes. */
18456 if (line_ptr
!= extended_end
)
18458 complaint (&symfile_complaints
,
18459 _("mangled .debug_line section"));
18464 dwarf_record_line (&reader_state
, &state_machine
, 0);
18465 state_machine
.discriminator
= 0;
18467 case DW_LNS_advance_pc
:
18470 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18471 CORE_ADDR addr_adj
;
18473 addr_adj
= (((state_machine
.op_index
+ adjust
)
18474 / lh
->maximum_ops_per_instruction
)
18475 * lh
->minimum_instruction_length
);
18476 state_machine
.address
18477 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
18478 state_machine
.op_index
= ((state_machine
.op_index
+ adjust
)
18479 % lh
->maximum_ops_per_instruction
);
18480 line_ptr
+= bytes_read
;
18483 case DW_LNS_advance_line
:
18486 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
18488 state_machine
.line
+= line_delta
;
18489 if (line_delta
!= 0)
18490 state_machine
.line_has_non_zero_discriminator
18491 = state_machine
.discriminator
!= 0;
18492 line_ptr
+= bytes_read
;
18495 case DW_LNS_set_file
:
18497 /* The arrays lh->include_dirs and lh->file_names are
18498 0-based, but the directory and file name numbers in
18499 the statement program are 1-based. */
18500 struct file_entry
*fe
;
18501 const char *dir
= NULL
;
18503 state_machine
.file
= read_unsigned_leb128 (abfd
, line_ptr
,
18505 line_ptr
+= bytes_read
;
18506 if (state_machine
.file
== 0
18507 || state_machine
.file
- 1 >= lh
->num_file_names
)
18508 dwarf2_debug_line_missing_file_complaint ();
18511 fe
= &lh
->file_names
[state_machine
.file
- 1];
18512 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
18513 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
18514 if (record_lines_p
)
18516 state_machine
.last_subfile
= current_subfile
;
18517 state_machine
.line_has_non_zero_discriminator
18518 = state_machine
.discriminator
!= 0;
18519 dwarf2_start_subfile (fe
->name
, dir
);
18524 case DW_LNS_set_column
:
18525 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18526 line_ptr
+= bytes_read
;
18528 case DW_LNS_negate_stmt
:
18529 state_machine
.is_stmt
= (!state_machine
.is_stmt
);
18531 case DW_LNS_set_basic_block
:
18533 /* Add to the address register of the state machine the
18534 address increment value corresponding to special opcode
18535 255. I.e., this value is scaled by the minimum
18536 instruction length since special opcode 255 would have
18537 scaled the increment. */
18538 case DW_LNS_const_add_pc
:
18540 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
18541 CORE_ADDR addr_adj
;
18543 addr_adj
= (((state_machine
.op_index
+ adjust
)
18544 / lh
->maximum_ops_per_instruction
)
18545 * lh
->minimum_instruction_length
);
18546 state_machine
.address
18547 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
18548 state_machine
.op_index
= ((state_machine
.op_index
+ adjust
)
18549 % lh
->maximum_ops_per_instruction
);
18552 case DW_LNS_fixed_advance_pc
:
18554 CORE_ADDR addr_adj
;
18556 addr_adj
= read_2_bytes (abfd
, line_ptr
);
18557 state_machine
.address
18558 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
18559 state_machine
.op_index
= 0;
18565 /* Unknown standard opcode, ignore it. */
18568 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
18570 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18571 line_ptr
+= bytes_read
;
18578 dwarf2_debug_line_missing_end_sequence_complaint ();
18580 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
18581 in which case we still finish recording the last line). */
18582 dwarf_record_line (&reader_state
, &state_machine
, 1);
18586 /* Decode the Line Number Program (LNP) for the given line_header
18587 structure and CU. The actual information extracted and the type
18588 of structures created from the LNP depends on the value of PST.
18590 1. If PST is NULL, then this procedure uses the data from the program
18591 to create all necessary symbol tables, and their linetables.
18593 2. If PST is not NULL, this procedure reads the program to determine
18594 the list of files included by the unit represented by PST, and
18595 builds all the associated partial symbol tables.
18597 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
18598 It is used for relative paths in the line table.
18599 NOTE: When processing partial symtabs (pst != NULL),
18600 comp_dir == pst->dirname.
18602 NOTE: It is important that psymtabs have the same file name (via strcmp)
18603 as the corresponding symtab. Since COMP_DIR is not used in the name of the
18604 symtab we don't use it in the name of the psymtabs we create.
18605 E.g. expand_line_sal requires this when finding psymtabs to expand.
18606 A good testcase for this is mb-inline.exp.
18608 LOWPC is the lowest address in CU (or 0 if not known).
18610 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
18611 for its PC<->lines mapping information. Otherwise only the filename
18612 table is read in. */
18615 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
18616 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
18617 CORE_ADDR lowpc
, int decode_mapping
)
18619 struct objfile
*objfile
= cu
->objfile
;
18620 const int decode_for_pst_p
= (pst
!= NULL
);
18622 if (decode_mapping
)
18623 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
18625 if (decode_for_pst_p
)
18629 /* Now that we're done scanning the Line Header Program, we can
18630 create the psymtab of each included file. */
18631 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
18632 if (lh
->file_names
[file_index
].included_p
== 1)
18634 const char *include_name
=
18635 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
18636 if (include_name
!= NULL
)
18637 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
18642 /* Make sure a symtab is created for every file, even files
18643 which contain only variables (i.e. no code with associated
18645 struct compunit_symtab
*cust
= buildsym_compunit_symtab ();
18648 for (i
= 0; i
< lh
->num_file_names
; i
++)
18650 const char *dir
= NULL
;
18651 struct file_entry
*fe
;
18653 fe
= &lh
->file_names
[i
];
18654 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
18655 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
18656 dwarf2_start_subfile (fe
->name
, dir
);
18658 if (current_subfile
->symtab
== NULL
)
18660 current_subfile
->symtab
18661 = allocate_symtab (cust
, current_subfile
->name
);
18663 fe
->symtab
= current_subfile
->symtab
;
18668 /* Start a subfile for DWARF. FILENAME is the name of the file and
18669 DIRNAME the name of the source directory which contains FILENAME
18670 or NULL if not known.
18671 This routine tries to keep line numbers from identical absolute and
18672 relative file names in a common subfile.
18674 Using the `list' example from the GDB testsuite, which resides in
18675 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
18676 of /srcdir/list0.c yields the following debugging information for list0.c:
18678 DW_AT_name: /srcdir/list0.c
18679 DW_AT_comp_dir: /compdir
18680 files.files[0].name: list0.h
18681 files.files[0].dir: /srcdir
18682 files.files[1].name: list0.c
18683 files.files[1].dir: /srcdir
18685 The line number information for list0.c has to end up in a single
18686 subfile, so that `break /srcdir/list0.c:1' works as expected.
18687 start_subfile will ensure that this happens provided that we pass the
18688 concatenation of files.files[1].dir and files.files[1].name as the
18692 dwarf2_start_subfile (const char *filename
, const char *dirname
)
18696 /* In order not to lose the line information directory,
18697 we concatenate it to the filename when it makes sense.
18698 Note that the Dwarf3 standard says (speaking of filenames in line
18699 information): ``The directory index is ignored for file names
18700 that represent full path names''. Thus ignoring dirname in the
18701 `else' branch below isn't an issue. */
18703 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
18705 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
18709 start_subfile (filename
);
18715 /* Start a symtab for DWARF.
18716 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
18718 static struct compunit_symtab
*
18719 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
18720 const char *name
, const char *comp_dir
, CORE_ADDR low_pc
)
18722 struct compunit_symtab
*cust
18723 = start_symtab (cu
->objfile
, name
, comp_dir
, low_pc
);
18725 record_debugformat ("DWARF 2");
18726 record_producer (cu
->producer
);
18728 /* We assume that we're processing GCC output. */
18729 processing_gcc_compilation
= 2;
18731 cu
->processing_has_namespace_info
= 0;
18737 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
18738 struct dwarf2_cu
*cu
)
18740 struct objfile
*objfile
= cu
->objfile
;
18741 struct comp_unit_head
*cu_header
= &cu
->header
;
18743 /* NOTE drow/2003-01-30: There used to be a comment and some special
18744 code here to turn a symbol with DW_AT_external and a
18745 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
18746 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
18747 with some versions of binutils) where shared libraries could have
18748 relocations against symbols in their debug information - the
18749 minimal symbol would have the right address, but the debug info
18750 would not. It's no longer necessary, because we will explicitly
18751 apply relocations when we read in the debug information now. */
18753 /* A DW_AT_location attribute with no contents indicates that a
18754 variable has been optimized away. */
18755 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
18757 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
18761 /* Handle one degenerate form of location expression specially, to
18762 preserve GDB's previous behavior when section offsets are
18763 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
18764 then mark this symbol as LOC_STATIC. */
18766 if (attr_form_is_block (attr
)
18767 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
18768 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
18769 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
18770 && (DW_BLOCK (attr
)->size
18771 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
18773 unsigned int dummy
;
18775 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
18776 SYMBOL_VALUE_ADDRESS (sym
) =
18777 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
18779 SYMBOL_VALUE_ADDRESS (sym
) =
18780 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
18781 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
18782 fixup_symbol_section (sym
, objfile
);
18783 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
18784 SYMBOL_SECTION (sym
));
18788 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
18789 expression evaluator, and use LOC_COMPUTED only when necessary
18790 (i.e. when the value of a register or memory location is
18791 referenced, or a thread-local block, etc.). Then again, it might
18792 not be worthwhile. I'm assuming that it isn't unless performance
18793 or memory numbers show me otherwise. */
18795 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
18797 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
18798 cu
->has_loclist
= 1;
18801 /* Given a pointer to a DWARF information entry, figure out if we need
18802 to make a symbol table entry for it, and if so, create a new entry
18803 and return a pointer to it.
18804 If TYPE is NULL, determine symbol type from the die, otherwise
18805 used the passed type.
18806 If SPACE is not NULL, use it to hold the new symbol. If it is
18807 NULL, allocate a new symbol on the objfile's obstack. */
18809 static struct symbol
*
18810 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
18811 struct symbol
*space
)
18813 struct objfile
*objfile
= cu
->objfile
;
18814 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18815 struct symbol
*sym
= NULL
;
18817 struct attribute
*attr
= NULL
;
18818 struct attribute
*attr2
= NULL
;
18819 CORE_ADDR baseaddr
;
18820 struct pending
**list_to_add
= NULL
;
18822 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
18824 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
18826 name
= dwarf2_name (die
, cu
);
18829 const char *linkagename
;
18830 int suppress_add
= 0;
18835 sym
= allocate_symbol (objfile
);
18836 OBJSTAT (objfile
, n_syms
++);
18838 /* Cache this symbol's name and the name's demangled form (if any). */
18839 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
18840 linkagename
= dwarf2_physname (name
, die
, cu
);
18841 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
18843 /* Fortran does not have mangling standard and the mangling does differ
18844 between gfortran, iFort etc. */
18845 if (cu
->language
== language_fortran
18846 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
18847 symbol_set_demangled_name (&(sym
->ginfo
),
18848 dwarf2_full_name (name
, die
, cu
),
18851 /* Default assumptions.
18852 Use the passed type or decode it from the die. */
18853 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18854 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
18856 SYMBOL_TYPE (sym
) = type
;
18858 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
18859 attr
= dwarf2_attr (die
,
18860 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
18864 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
18867 attr
= dwarf2_attr (die
,
18868 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
18872 int file_index
= DW_UNSND (attr
);
18874 if (cu
->line_header
== NULL
18875 || file_index
> cu
->line_header
->num_file_names
)
18876 complaint (&symfile_complaints
,
18877 _("file index out of range"));
18878 else if (file_index
> 0)
18880 struct file_entry
*fe
;
18882 fe
= &cu
->line_header
->file_names
[file_index
- 1];
18883 symbol_set_symtab (sym
, fe
->symtab
);
18890 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
18895 addr
= attr_value_as_address (attr
);
18896 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
18897 SYMBOL_VALUE_ADDRESS (sym
) = addr
;
18899 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
18900 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
18901 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
18902 add_symbol_to_list (sym
, cu
->list_in_scope
);
18904 case DW_TAG_subprogram
:
18905 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
18907 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
18908 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18909 if ((attr2
&& (DW_UNSND (attr2
) != 0))
18910 || cu
->language
== language_ada
)
18912 /* Subprograms marked external are stored as a global symbol.
18913 Ada subprograms, whether marked external or not, are always
18914 stored as a global symbol, because we want to be able to
18915 access them globally. For instance, we want to be able
18916 to break on a nested subprogram without having to
18917 specify the context. */
18918 list_to_add
= &global_symbols
;
18922 list_to_add
= cu
->list_in_scope
;
18925 case DW_TAG_inlined_subroutine
:
18926 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
18928 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
18929 SYMBOL_INLINED (sym
) = 1;
18930 list_to_add
= cu
->list_in_scope
;
18932 case DW_TAG_template_value_param
:
18934 /* Fall through. */
18935 case DW_TAG_constant
:
18936 case DW_TAG_variable
:
18937 case DW_TAG_member
:
18938 /* Compilation with minimal debug info may result in
18939 variables with missing type entries. Change the
18940 misleading `void' type to something sensible. */
18941 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
18943 = objfile_type (objfile
)->nodebug_data_symbol
;
18945 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18946 /* In the case of DW_TAG_member, we should only be called for
18947 static const members. */
18948 if (die
->tag
== DW_TAG_member
)
18950 /* dwarf2_add_field uses die_is_declaration,
18951 so we do the same. */
18952 gdb_assert (die_is_declaration (die
, cu
));
18957 dwarf2_const_value (attr
, sym
, cu
);
18958 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18961 if (attr2
&& (DW_UNSND (attr2
) != 0))
18962 list_to_add
= &global_symbols
;
18964 list_to_add
= cu
->list_in_scope
;
18968 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
18971 var_decode_location (attr
, sym
, cu
);
18972 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18974 /* Fortran explicitly imports any global symbols to the local
18975 scope by DW_TAG_common_block. */
18976 if (cu
->language
== language_fortran
&& die
->parent
18977 && die
->parent
->tag
== DW_TAG_common_block
)
18980 if (SYMBOL_CLASS (sym
) == LOC_STATIC
18981 && SYMBOL_VALUE_ADDRESS (sym
) == 0
18982 && !dwarf2_per_objfile
->has_section_at_zero
)
18984 /* When a static variable is eliminated by the linker,
18985 the corresponding debug information is not stripped
18986 out, but the variable address is set to null;
18987 do not add such variables into symbol table. */
18989 else if (attr2
&& (DW_UNSND (attr2
) != 0))
18991 /* Workaround gfortran PR debug/40040 - it uses
18992 DW_AT_location for variables in -fPIC libraries which may
18993 get overriden by other libraries/executable and get
18994 a different address. Resolve it by the minimal symbol
18995 which may come from inferior's executable using copy
18996 relocation. Make this workaround only for gfortran as for
18997 other compilers GDB cannot guess the minimal symbol
18998 Fortran mangling kind. */
18999 if (cu
->language
== language_fortran
&& die
->parent
19000 && die
->parent
->tag
== DW_TAG_module
19002 && startswith (cu
->producer
, "GNU Fortran"))
19003 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
19005 /* A variable with DW_AT_external is never static,
19006 but it may be block-scoped. */
19007 list_to_add
= (cu
->list_in_scope
== &file_symbols
19008 ? &global_symbols
: cu
->list_in_scope
);
19011 list_to_add
= cu
->list_in_scope
;
19015 /* We do not know the address of this symbol.
19016 If it is an external symbol and we have type information
19017 for it, enter the symbol as a LOC_UNRESOLVED symbol.
19018 The address of the variable will then be determined from
19019 the minimal symbol table whenever the variable is
19021 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
19023 /* Fortran explicitly imports any global symbols to the local
19024 scope by DW_TAG_common_block. */
19025 if (cu
->language
== language_fortran
&& die
->parent
19026 && die
->parent
->tag
== DW_TAG_common_block
)
19028 /* SYMBOL_CLASS doesn't matter here because
19029 read_common_block is going to reset it. */
19031 list_to_add
= cu
->list_in_scope
;
19033 else if (attr2
&& (DW_UNSND (attr2
) != 0)
19034 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
19036 /* A variable with DW_AT_external is never static, but it
19037 may be block-scoped. */
19038 list_to_add
= (cu
->list_in_scope
== &file_symbols
19039 ? &global_symbols
: cu
->list_in_scope
);
19041 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
19043 else if (!die_is_declaration (die
, cu
))
19045 /* Use the default LOC_OPTIMIZED_OUT class. */
19046 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
19048 list_to_add
= cu
->list_in_scope
;
19052 case DW_TAG_formal_parameter
:
19053 /* If we are inside a function, mark this as an argument. If
19054 not, we might be looking at an argument to an inlined function
19055 when we do not have enough information to show inlined frames;
19056 pretend it's a local variable in that case so that the user can
19058 if (context_stack_depth
> 0
19059 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
19060 SYMBOL_IS_ARGUMENT (sym
) = 1;
19061 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
19064 var_decode_location (attr
, sym
, cu
);
19066 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
19069 dwarf2_const_value (attr
, sym
, cu
);
19072 list_to_add
= cu
->list_in_scope
;
19074 case DW_TAG_unspecified_parameters
:
19075 /* From varargs functions; gdb doesn't seem to have any
19076 interest in this information, so just ignore it for now.
19079 case DW_TAG_template_type_param
:
19081 /* Fall through. */
19082 case DW_TAG_class_type
:
19083 case DW_TAG_interface_type
:
19084 case DW_TAG_structure_type
:
19085 case DW_TAG_union_type
:
19086 case DW_TAG_set_type
:
19087 case DW_TAG_enumeration_type
:
19088 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
19089 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
19092 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
19093 really ever be static objects: otherwise, if you try
19094 to, say, break of a class's method and you're in a file
19095 which doesn't mention that class, it won't work unless
19096 the check for all static symbols in lookup_symbol_aux
19097 saves you. See the OtherFileClass tests in
19098 gdb.c++/namespace.exp. */
19102 list_to_add
= (cu
->list_in_scope
== &file_symbols
19103 && cu
->language
== language_cplus
19104 ? &global_symbols
: cu
->list_in_scope
);
19106 /* The semantics of C++ state that "struct foo {
19107 ... }" also defines a typedef for "foo". */
19108 if (cu
->language
== language_cplus
19109 || cu
->language
== language_ada
19110 || cu
->language
== language_d
19111 || cu
->language
== language_rust
)
19113 /* The symbol's name is already allocated along
19114 with this objfile, so we don't need to
19115 duplicate it for the type. */
19116 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
19117 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
19122 case DW_TAG_typedef
:
19123 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
19124 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
19125 list_to_add
= cu
->list_in_scope
;
19127 case DW_TAG_base_type
:
19128 case DW_TAG_subrange_type
:
19129 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
19130 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
19131 list_to_add
= cu
->list_in_scope
;
19133 case DW_TAG_enumerator
:
19134 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
19137 dwarf2_const_value (attr
, sym
, cu
);
19140 /* NOTE: carlton/2003-11-10: See comment above in the
19141 DW_TAG_class_type, etc. block. */
19143 list_to_add
= (cu
->list_in_scope
== &file_symbols
19144 && cu
->language
== language_cplus
19145 ? &global_symbols
: cu
->list_in_scope
);
19148 case DW_TAG_imported_declaration
:
19149 case DW_TAG_namespace
:
19150 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
19151 list_to_add
= &global_symbols
;
19153 case DW_TAG_module
:
19154 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
19155 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
19156 list_to_add
= &global_symbols
;
19158 case DW_TAG_common_block
:
19159 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
19160 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
19161 add_symbol_to_list (sym
, cu
->list_in_scope
);
19164 /* Not a tag we recognize. Hopefully we aren't processing
19165 trash data, but since we must specifically ignore things
19166 we don't recognize, there is nothing else we should do at
19168 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
19169 dwarf_tag_name (die
->tag
));
19175 sym
->hash_next
= objfile
->template_symbols
;
19176 objfile
->template_symbols
= sym
;
19177 list_to_add
= NULL
;
19180 if (list_to_add
!= NULL
)
19181 add_symbol_to_list (sym
, list_to_add
);
19183 /* For the benefit of old versions of GCC, check for anonymous
19184 namespaces based on the demangled name. */
19185 if (!cu
->processing_has_namespace_info
19186 && cu
->language
== language_cplus
)
19187 cp_scan_for_anonymous_namespaces (sym
, objfile
);
19192 /* A wrapper for new_symbol_full that always allocates a new symbol. */
19194 static struct symbol
*
19195 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
19197 return new_symbol_full (die
, type
, cu
, NULL
);
19200 /* Given an attr with a DW_FORM_dataN value in host byte order,
19201 zero-extend it as appropriate for the symbol's type. The DWARF
19202 standard (v4) is not entirely clear about the meaning of using
19203 DW_FORM_dataN for a constant with a signed type, where the type is
19204 wider than the data. The conclusion of a discussion on the DWARF
19205 list was that this is unspecified. We choose to always zero-extend
19206 because that is the interpretation long in use by GCC. */
19209 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
19210 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
19212 struct objfile
*objfile
= cu
->objfile
;
19213 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
19214 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
19215 LONGEST l
= DW_UNSND (attr
);
19217 if (bits
< sizeof (*value
) * 8)
19219 l
&= ((LONGEST
) 1 << bits
) - 1;
19222 else if (bits
== sizeof (*value
) * 8)
19226 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
19227 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
19234 /* Read a constant value from an attribute. Either set *VALUE, or if
19235 the value does not fit in *VALUE, set *BYTES - either already
19236 allocated on the objfile obstack, or newly allocated on OBSTACK,
19237 or, set *BATON, if we translated the constant to a location
19241 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
19242 const char *name
, struct obstack
*obstack
,
19243 struct dwarf2_cu
*cu
,
19244 LONGEST
*value
, const gdb_byte
**bytes
,
19245 struct dwarf2_locexpr_baton
**baton
)
19247 struct objfile
*objfile
= cu
->objfile
;
19248 struct comp_unit_head
*cu_header
= &cu
->header
;
19249 struct dwarf_block
*blk
;
19250 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
19251 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
19257 switch (attr
->form
)
19260 case DW_FORM_GNU_addr_index
:
19264 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
19265 dwarf2_const_value_length_mismatch_complaint (name
,
19266 cu_header
->addr_size
,
19267 TYPE_LENGTH (type
));
19268 /* Symbols of this form are reasonably rare, so we just
19269 piggyback on the existing location code rather than writing
19270 a new implementation of symbol_computed_ops. */
19271 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
19272 (*baton
)->per_cu
= cu
->per_cu
;
19273 gdb_assert ((*baton
)->per_cu
);
19275 (*baton
)->size
= 2 + cu_header
->addr_size
;
19276 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
19277 (*baton
)->data
= data
;
19279 data
[0] = DW_OP_addr
;
19280 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
19281 byte_order
, DW_ADDR (attr
));
19282 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
19285 case DW_FORM_string
:
19287 case DW_FORM_GNU_str_index
:
19288 case DW_FORM_GNU_strp_alt
:
19289 /* DW_STRING is already allocated on the objfile obstack, point
19291 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
19293 case DW_FORM_block1
:
19294 case DW_FORM_block2
:
19295 case DW_FORM_block4
:
19296 case DW_FORM_block
:
19297 case DW_FORM_exprloc
:
19298 blk
= DW_BLOCK (attr
);
19299 if (TYPE_LENGTH (type
) != blk
->size
)
19300 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
19301 TYPE_LENGTH (type
));
19302 *bytes
= blk
->data
;
19305 /* The DW_AT_const_value attributes are supposed to carry the
19306 symbol's value "represented as it would be on the target
19307 architecture." By the time we get here, it's already been
19308 converted to host endianness, so we just need to sign- or
19309 zero-extend it as appropriate. */
19310 case DW_FORM_data1
:
19311 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
19313 case DW_FORM_data2
:
19314 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
19316 case DW_FORM_data4
:
19317 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
19319 case DW_FORM_data8
:
19320 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
19323 case DW_FORM_sdata
:
19324 *value
= DW_SND (attr
);
19327 case DW_FORM_udata
:
19328 *value
= DW_UNSND (attr
);
19332 complaint (&symfile_complaints
,
19333 _("unsupported const value attribute form: '%s'"),
19334 dwarf_form_name (attr
->form
));
19341 /* Copy constant value from an attribute to a symbol. */
19344 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
19345 struct dwarf2_cu
*cu
)
19347 struct objfile
*objfile
= cu
->objfile
;
19349 const gdb_byte
*bytes
;
19350 struct dwarf2_locexpr_baton
*baton
;
19352 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
19353 SYMBOL_PRINT_NAME (sym
),
19354 &objfile
->objfile_obstack
, cu
,
19355 &value
, &bytes
, &baton
);
19359 SYMBOL_LOCATION_BATON (sym
) = baton
;
19360 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
19362 else if (bytes
!= NULL
)
19364 SYMBOL_VALUE_BYTES (sym
) = bytes
;
19365 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
19369 SYMBOL_VALUE (sym
) = value
;
19370 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
19374 /* Return the type of the die in question using its DW_AT_type attribute. */
19376 static struct type
*
19377 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
19379 struct attribute
*type_attr
;
19381 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
19384 /* A missing DW_AT_type represents a void type. */
19385 return objfile_type (cu
->objfile
)->builtin_void
;
19388 return lookup_die_type (die
, type_attr
, cu
);
19391 /* True iff CU's producer generates GNAT Ada auxiliary information
19392 that allows to find parallel types through that information instead
19393 of having to do expensive parallel lookups by type name. */
19396 need_gnat_info (struct dwarf2_cu
*cu
)
19398 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
19399 of GNAT produces this auxiliary information, without any indication
19400 that it is produced. Part of enhancing the FSF version of GNAT
19401 to produce that information will be to put in place an indicator
19402 that we can use in order to determine whether the descriptive type
19403 info is available or not. One suggestion that has been made is
19404 to use a new attribute, attached to the CU die. For now, assume
19405 that the descriptive type info is not available. */
19409 /* Return the auxiliary type of the die in question using its
19410 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
19411 attribute is not present. */
19413 static struct type
*
19414 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
19416 struct attribute
*type_attr
;
19418 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
19422 return lookup_die_type (die
, type_attr
, cu
);
19425 /* If DIE has a descriptive_type attribute, then set the TYPE's
19426 descriptive type accordingly. */
19429 set_descriptive_type (struct type
*type
, struct die_info
*die
,
19430 struct dwarf2_cu
*cu
)
19432 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
19434 if (descriptive_type
)
19436 ALLOCATE_GNAT_AUX_TYPE (type
);
19437 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
19441 /* Return the containing type of the die in question using its
19442 DW_AT_containing_type attribute. */
19444 static struct type
*
19445 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
19447 struct attribute
*type_attr
;
19449 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
19451 error (_("Dwarf Error: Problem turning containing type into gdb type "
19452 "[in module %s]"), objfile_name (cu
->objfile
));
19454 return lookup_die_type (die
, type_attr
, cu
);
19457 /* Return an error marker type to use for the ill formed type in DIE/CU. */
19459 static struct type
*
19460 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
19462 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19463 char *message
, *saved
;
19465 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
19466 objfile_name (objfile
),
19467 cu
->header
.offset
.sect_off
,
19468 die
->offset
.sect_off
);
19469 saved
= (char *) obstack_copy0 (&objfile
->objfile_obstack
,
19470 message
, strlen (message
));
19473 return init_type (objfile
, TYPE_CODE_ERROR
, 0, saved
);
19476 /* Look up the type of DIE in CU using its type attribute ATTR.
19477 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
19478 DW_AT_containing_type.
19479 If there is no type substitute an error marker. */
19481 static struct type
*
19482 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
19483 struct dwarf2_cu
*cu
)
19485 struct objfile
*objfile
= cu
->objfile
;
19486 struct type
*this_type
;
19488 gdb_assert (attr
->name
== DW_AT_type
19489 || attr
->name
== DW_AT_GNAT_descriptive_type
19490 || attr
->name
== DW_AT_containing_type
);
19492 /* First see if we have it cached. */
19494 if (attr
->form
== DW_FORM_GNU_ref_alt
)
19496 struct dwarf2_per_cu_data
*per_cu
;
19497 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
19499 per_cu
= dwarf2_find_containing_comp_unit (offset
, 1, cu
->objfile
);
19500 this_type
= get_die_type_at_offset (offset
, per_cu
);
19502 else if (attr_form_is_ref (attr
))
19504 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
19506 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
19508 else if (attr
->form
== DW_FORM_ref_sig8
)
19510 ULONGEST signature
= DW_SIGNATURE (attr
);
19512 return get_signatured_type (die
, signature
, cu
);
19516 complaint (&symfile_complaints
,
19517 _("Dwarf Error: Bad type attribute %s in DIE"
19518 " at 0x%x [in module %s]"),
19519 dwarf_attr_name (attr
->name
), die
->offset
.sect_off
,
19520 objfile_name (objfile
));
19521 return build_error_marker_type (cu
, die
);
19524 /* If not cached we need to read it in. */
19526 if (this_type
== NULL
)
19528 struct die_info
*type_die
= NULL
;
19529 struct dwarf2_cu
*type_cu
= cu
;
19531 if (attr_form_is_ref (attr
))
19532 type_die
= follow_die_ref (die
, attr
, &type_cu
);
19533 if (type_die
== NULL
)
19534 return build_error_marker_type (cu
, die
);
19535 /* If we find the type now, it's probably because the type came
19536 from an inter-CU reference and the type's CU got expanded before
19538 this_type
= read_type_die (type_die
, type_cu
);
19541 /* If we still don't have a type use an error marker. */
19543 if (this_type
== NULL
)
19544 return build_error_marker_type (cu
, die
);
19549 /* Return the type in DIE, CU.
19550 Returns NULL for invalid types.
19552 This first does a lookup in die_type_hash,
19553 and only reads the die in if necessary.
19555 NOTE: This can be called when reading in partial or full symbols. */
19557 static struct type
*
19558 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
19560 struct type
*this_type
;
19562 this_type
= get_die_type (die
, cu
);
19566 return read_type_die_1 (die
, cu
);
19569 /* Read the type in DIE, CU.
19570 Returns NULL for invalid types. */
19572 static struct type
*
19573 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
19575 struct type
*this_type
= NULL
;
19579 case DW_TAG_class_type
:
19580 case DW_TAG_interface_type
:
19581 case DW_TAG_structure_type
:
19582 case DW_TAG_union_type
:
19583 this_type
= read_structure_type (die
, cu
);
19585 case DW_TAG_enumeration_type
:
19586 this_type
= read_enumeration_type (die
, cu
);
19588 case DW_TAG_subprogram
:
19589 case DW_TAG_subroutine_type
:
19590 case DW_TAG_inlined_subroutine
:
19591 this_type
= read_subroutine_type (die
, cu
);
19593 case DW_TAG_array_type
:
19594 this_type
= read_array_type (die
, cu
);
19596 case DW_TAG_set_type
:
19597 this_type
= read_set_type (die
, cu
);
19599 case DW_TAG_pointer_type
:
19600 this_type
= read_tag_pointer_type (die
, cu
);
19602 case DW_TAG_ptr_to_member_type
:
19603 this_type
= read_tag_ptr_to_member_type (die
, cu
);
19605 case DW_TAG_reference_type
:
19606 this_type
= read_tag_reference_type (die
, cu
);
19608 case DW_TAG_const_type
:
19609 this_type
= read_tag_const_type (die
, cu
);
19611 case DW_TAG_volatile_type
:
19612 this_type
= read_tag_volatile_type (die
, cu
);
19614 case DW_TAG_restrict_type
:
19615 this_type
= read_tag_restrict_type (die
, cu
);
19617 case DW_TAG_string_type
:
19618 this_type
= read_tag_string_type (die
, cu
);
19620 case DW_TAG_typedef
:
19621 this_type
= read_typedef (die
, cu
);
19623 case DW_TAG_subrange_type
:
19624 this_type
= read_subrange_type (die
, cu
);
19626 case DW_TAG_base_type
:
19627 this_type
= read_base_type (die
, cu
);
19629 case DW_TAG_unspecified_type
:
19630 this_type
= read_unspecified_type (die
, cu
);
19632 case DW_TAG_namespace
:
19633 this_type
= read_namespace_type (die
, cu
);
19635 case DW_TAG_module
:
19636 this_type
= read_module_type (die
, cu
);
19638 case DW_TAG_atomic_type
:
19639 this_type
= read_tag_atomic_type (die
, cu
);
19642 complaint (&symfile_complaints
,
19643 _("unexpected tag in read_type_die: '%s'"),
19644 dwarf_tag_name (die
->tag
));
19651 /* See if we can figure out if the class lives in a namespace. We do
19652 this by looking for a member function; its demangled name will
19653 contain namespace info, if there is any.
19654 Return the computed name or NULL.
19655 Space for the result is allocated on the objfile's obstack.
19656 This is the full-die version of guess_partial_die_structure_name.
19657 In this case we know DIE has no useful parent. */
19660 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19662 struct die_info
*spec_die
;
19663 struct dwarf2_cu
*spec_cu
;
19664 struct die_info
*child
;
19667 spec_die
= die_specification (die
, &spec_cu
);
19668 if (spec_die
!= NULL
)
19674 for (child
= die
->child
;
19676 child
= child
->sibling
)
19678 if (child
->tag
== DW_TAG_subprogram
)
19680 const char *linkage_name
;
19682 linkage_name
= dwarf2_string_attr (child
, DW_AT_linkage_name
, cu
);
19683 if (linkage_name
== NULL
)
19684 linkage_name
= dwarf2_string_attr (child
, DW_AT_MIPS_linkage_name
,
19686 if (linkage_name
!= NULL
)
19689 = language_class_name_from_physname (cu
->language_defn
,
19693 if (actual_name
!= NULL
)
19695 const char *die_name
= dwarf2_name (die
, cu
);
19697 if (die_name
!= NULL
19698 && strcmp (die_name
, actual_name
) != 0)
19700 /* Strip off the class name from the full name.
19701 We want the prefix. */
19702 int die_name_len
= strlen (die_name
);
19703 int actual_name_len
= strlen (actual_name
);
19705 /* Test for '::' as a sanity check. */
19706 if (actual_name_len
> die_name_len
+ 2
19707 && actual_name
[actual_name_len
19708 - die_name_len
- 1] == ':')
19709 name
= (char *) obstack_copy0 (
19710 &cu
->objfile
->per_bfd
->storage_obstack
,
19711 actual_name
, actual_name_len
- die_name_len
- 2);
19714 xfree (actual_name
);
19723 /* GCC might emit a nameless typedef that has a linkage name. Determine the
19724 prefix part in such case. See
19725 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
19728 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
19730 struct attribute
*attr
;
19733 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
19734 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
19737 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
19740 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
19742 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
19743 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
19746 /* dwarf2_name had to be already called. */
19747 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
19749 /* Strip the base name, keep any leading namespaces/classes. */
19750 base
= strrchr (DW_STRING (attr
), ':');
19751 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
19754 return (char *) obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
19756 &base
[-1] - DW_STRING (attr
));
19759 /* Return the name of the namespace/class that DIE is defined within,
19760 or "" if we can't tell. The caller should not xfree the result.
19762 For example, if we're within the method foo() in the following
19772 then determine_prefix on foo's die will return "N::C". */
19774 static const char *
19775 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
19777 struct die_info
*parent
, *spec_die
;
19778 struct dwarf2_cu
*spec_cu
;
19779 struct type
*parent_type
;
19782 if (cu
->language
!= language_cplus
19783 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
19784 && cu
->language
!= language_rust
)
19787 retval
= anonymous_struct_prefix (die
, cu
);
19791 /* We have to be careful in the presence of DW_AT_specification.
19792 For example, with GCC 3.4, given the code
19796 // Definition of N::foo.
19800 then we'll have a tree of DIEs like this:
19802 1: DW_TAG_compile_unit
19803 2: DW_TAG_namespace // N
19804 3: DW_TAG_subprogram // declaration of N::foo
19805 4: DW_TAG_subprogram // definition of N::foo
19806 DW_AT_specification // refers to die #3
19808 Thus, when processing die #4, we have to pretend that we're in
19809 the context of its DW_AT_specification, namely the contex of die
19812 spec_die
= die_specification (die
, &spec_cu
);
19813 if (spec_die
== NULL
)
19814 parent
= die
->parent
;
19817 parent
= spec_die
->parent
;
19821 if (parent
== NULL
)
19823 else if (parent
->building_fullname
)
19826 const char *parent_name
;
19828 /* It has been seen on RealView 2.2 built binaries,
19829 DW_TAG_template_type_param types actually _defined_ as
19830 children of the parent class:
19833 template class <class Enum> Class{};
19834 Class<enum E> class_e;
19836 1: DW_TAG_class_type (Class)
19837 2: DW_TAG_enumeration_type (E)
19838 3: DW_TAG_enumerator (enum1:0)
19839 3: DW_TAG_enumerator (enum2:1)
19841 2: DW_TAG_template_type_param
19842 DW_AT_type DW_FORM_ref_udata (E)
19844 Besides being broken debug info, it can put GDB into an
19845 infinite loop. Consider:
19847 When we're building the full name for Class<E>, we'll start
19848 at Class, and go look over its template type parameters,
19849 finding E. We'll then try to build the full name of E, and
19850 reach here. We're now trying to build the full name of E,
19851 and look over the parent DIE for containing scope. In the
19852 broken case, if we followed the parent DIE of E, we'd again
19853 find Class, and once again go look at its template type
19854 arguments, etc., etc. Simply don't consider such parent die
19855 as source-level parent of this die (it can't be, the language
19856 doesn't allow it), and break the loop here. */
19857 name
= dwarf2_name (die
, cu
);
19858 parent_name
= dwarf2_name (parent
, cu
);
19859 complaint (&symfile_complaints
,
19860 _("template param type '%s' defined within parent '%s'"),
19861 name
? name
: "<unknown>",
19862 parent_name
? parent_name
: "<unknown>");
19866 switch (parent
->tag
)
19868 case DW_TAG_namespace
:
19869 parent_type
= read_type_die (parent
, cu
);
19870 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
19871 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
19872 Work around this problem here. */
19873 if (cu
->language
== language_cplus
19874 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
19876 /* We give a name to even anonymous namespaces. */
19877 return TYPE_TAG_NAME (parent_type
);
19878 case DW_TAG_class_type
:
19879 case DW_TAG_interface_type
:
19880 case DW_TAG_structure_type
:
19881 case DW_TAG_union_type
:
19882 case DW_TAG_module
:
19883 parent_type
= read_type_die (parent
, cu
);
19884 if (TYPE_TAG_NAME (parent_type
) != NULL
)
19885 return TYPE_TAG_NAME (parent_type
);
19887 /* An anonymous structure is only allowed non-static data
19888 members; no typedefs, no member functions, et cetera.
19889 So it does not need a prefix. */
19891 case DW_TAG_compile_unit
:
19892 case DW_TAG_partial_unit
:
19893 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
19894 if (cu
->language
== language_cplus
19895 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
19896 && die
->child
!= NULL
19897 && (die
->tag
== DW_TAG_class_type
19898 || die
->tag
== DW_TAG_structure_type
19899 || die
->tag
== DW_TAG_union_type
))
19901 char *name
= guess_full_die_structure_name (die
, cu
);
19906 case DW_TAG_enumeration_type
:
19907 parent_type
= read_type_die (parent
, cu
);
19908 if (TYPE_DECLARED_CLASS (parent_type
))
19910 if (TYPE_TAG_NAME (parent_type
) != NULL
)
19911 return TYPE_TAG_NAME (parent_type
);
19914 /* Fall through. */
19916 return determine_prefix (parent
, cu
);
19920 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
19921 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
19922 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
19923 an obconcat, otherwise allocate storage for the result. The CU argument is
19924 used to determine the language and hence, the appropriate separator. */
19926 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
19929 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
19930 int physname
, struct dwarf2_cu
*cu
)
19932 const char *lead
= "";
19935 if (suffix
== NULL
|| suffix
[0] == '\0'
19936 || prefix
== NULL
|| prefix
[0] == '\0')
19938 else if (cu
->language
== language_d
)
19940 /* For D, the 'main' function could be defined in any module, but it
19941 should never be prefixed. */
19942 if (strcmp (suffix
, "D main") == 0)
19950 else if (cu
->language
== language_fortran
&& physname
)
19952 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
19953 DW_AT_MIPS_linkage_name is preferred and used instead. */
19961 if (prefix
== NULL
)
19963 if (suffix
== NULL
)
19970 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
19972 strcpy (retval
, lead
);
19973 strcat (retval
, prefix
);
19974 strcat (retval
, sep
);
19975 strcat (retval
, suffix
);
19980 /* We have an obstack. */
19981 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
19985 /* Return sibling of die, NULL if no sibling. */
19987 static struct die_info
*
19988 sibling_die (struct die_info
*die
)
19990 return die
->sibling
;
19993 /* Get name of a die, return NULL if not found. */
19995 static const char *
19996 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
19997 struct obstack
*obstack
)
19999 if (name
&& cu
->language
== language_cplus
)
20001 std::string canon_name
= cp_canonicalize_string (name
);
20003 if (!canon_name
.empty ())
20005 if (canon_name
!= name
)
20006 name
= (const char *) obstack_copy0 (obstack
,
20007 canon_name
.c_str (),
20008 canon_name
.length ());
20015 /* Get name of a die, return NULL if not found.
20016 Anonymous namespaces are converted to their magic string. */
20018 static const char *
20019 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
20021 struct attribute
*attr
;
20023 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
20024 if ((!attr
|| !DW_STRING (attr
))
20025 && die
->tag
!= DW_TAG_namespace
20026 && die
->tag
!= DW_TAG_class_type
20027 && die
->tag
!= DW_TAG_interface_type
20028 && die
->tag
!= DW_TAG_structure_type
20029 && die
->tag
!= DW_TAG_union_type
)
20034 case DW_TAG_compile_unit
:
20035 case DW_TAG_partial_unit
:
20036 /* Compilation units have a DW_AT_name that is a filename, not
20037 a source language identifier. */
20038 case DW_TAG_enumeration_type
:
20039 case DW_TAG_enumerator
:
20040 /* These tags always have simple identifiers already; no need
20041 to canonicalize them. */
20042 return DW_STRING (attr
);
20044 case DW_TAG_namespace
:
20045 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
20046 return DW_STRING (attr
);
20047 return CP_ANONYMOUS_NAMESPACE_STR
;
20049 case DW_TAG_class_type
:
20050 case DW_TAG_interface_type
:
20051 case DW_TAG_structure_type
:
20052 case DW_TAG_union_type
:
20053 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
20054 structures or unions. These were of the form "._%d" in GCC 4.1,
20055 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
20056 and GCC 4.4. We work around this problem by ignoring these. */
20057 if (attr
&& DW_STRING (attr
)
20058 && (startswith (DW_STRING (attr
), "._")
20059 || startswith (DW_STRING (attr
), "<anonymous")))
20062 /* GCC might emit a nameless typedef that has a linkage name. See
20063 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
20064 if (!attr
|| DW_STRING (attr
) == NULL
)
20066 char *demangled
= NULL
;
20068 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
20070 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
20072 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
20075 /* Avoid demangling DW_STRING (attr) the second time on a second
20076 call for the same DIE. */
20077 if (!DW_STRING_IS_CANONICAL (attr
))
20078 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
20084 /* FIXME: we already did this for the partial symbol... */
20087 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
20088 demangled
, strlen (demangled
)));
20089 DW_STRING_IS_CANONICAL (attr
) = 1;
20092 /* Strip any leading namespaces/classes, keep only the base name.
20093 DW_AT_name for named DIEs does not contain the prefixes. */
20094 base
= strrchr (DW_STRING (attr
), ':');
20095 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
20098 return DW_STRING (attr
);
20107 if (!DW_STRING_IS_CANONICAL (attr
))
20110 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
20111 &cu
->objfile
->per_bfd
->storage_obstack
);
20112 DW_STRING_IS_CANONICAL (attr
) = 1;
20114 return DW_STRING (attr
);
20117 /* Return the die that this die in an extension of, or NULL if there
20118 is none. *EXT_CU is the CU containing DIE on input, and the CU
20119 containing the return value on output. */
20121 static struct die_info
*
20122 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
20124 struct attribute
*attr
;
20126 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
20130 return follow_die_ref (die
, attr
, ext_cu
);
20133 /* Convert a DIE tag into its string name. */
20135 static const char *
20136 dwarf_tag_name (unsigned tag
)
20138 const char *name
= get_DW_TAG_name (tag
);
20141 return "DW_TAG_<unknown>";
20146 /* Convert a DWARF attribute code into its string name. */
20148 static const char *
20149 dwarf_attr_name (unsigned attr
)
20153 #ifdef MIPS /* collides with DW_AT_HP_block_index */
20154 if (attr
== DW_AT_MIPS_fde
)
20155 return "DW_AT_MIPS_fde";
20157 if (attr
== DW_AT_HP_block_index
)
20158 return "DW_AT_HP_block_index";
20161 name
= get_DW_AT_name (attr
);
20164 return "DW_AT_<unknown>";
20169 /* Convert a DWARF value form code into its string name. */
20171 static const char *
20172 dwarf_form_name (unsigned form
)
20174 const char *name
= get_DW_FORM_name (form
);
20177 return "DW_FORM_<unknown>";
20183 dwarf_bool_name (unsigned mybool
)
20191 /* Convert a DWARF type code into its string name. */
20193 static const char *
20194 dwarf_type_encoding_name (unsigned enc
)
20196 const char *name
= get_DW_ATE_name (enc
);
20199 return "DW_ATE_<unknown>";
20205 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
20209 print_spaces (indent
, f
);
20210 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
20211 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
.sect_off
);
20213 if (die
->parent
!= NULL
)
20215 print_spaces (indent
, f
);
20216 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
20217 die
->parent
->offset
.sect_off
);
20220 print_spaces (indent
, f
);
20221 fprintf_unfiltered (f
, " has children: %s\n",
20222 dwarf_bool_name (die
->child
!= NULL
));
20224 print_spaces (indent
, f
);
20225 fprintf_unfiltered (f
, " attributes:\n");
20227 for (i
= 0; i
< die
->num_attrs
; ++i
)
20229 print_spaces (indent
, f
);
20230 fprintf_unfiltered (f
, " %s (%s) ",
20231 dwarf_attr_name (die
->attrs
[i
].name
),
20232 dwarf_form_name (die
->attrs
[i
].form
));
20234 switch (die
->attrs
[i
].form
)
20237 case DW_FORM_GNU_addr_index
:
20238 fprintf_unfiltered (f
, "address: ");
20239 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
20241 case DW_FORM_block2
:
20242 case DW_FORM_block4
:
20243 case DW_FORM_block
:
20244 case DW_FORM_block1
:
20245 fprintf_unfiltered (f
, "block: size %s",
20246 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
20248 case DW_FORM_exprloc
:
20249 fprintf_unfiltered (f
, "expression: size %s",
20250 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
20252 case DW_FORM_ref_addr
:
20253 fprintf_unfiltered (f
, "ref address: ");
20254 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
20256 case DW_FORM_GNU_ref_alt
:
20257 fprintf_unfiltered (f
, "alt ref address: ");
20258 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
20264 case DW_FORM_ref_udata
:
20265 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
20266 (long) (DW_UNSND (&die
->attrs
[i
])));
20268 case DW_FORM_data1
:
20269 case DW_FORM_data2
:
20270 case DW_FORM_data4
:
20271 case DW_FORM_data8
:
20272 case DW_FORM_udata
:
20273 case DW_FORM_sdata
:
20274 fprintf_unfiltered (f
, "constant: %s",
20275 pulongest (DW_UNSND (&die
->attrs
[i
])));
20277 case DW_FORM_sec_offset
:
20278 fprintf_unfiltered (f
, "section offset: %s",
20279 pulongest (DW_UNSND (&die
->attrs
[i
])));
20281 case DW_FORM_ref_sig8
:
20282 fprintf_unfiltered (f
, "signature: %s",
20283 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
20285 case DW_FORM_string
:
20287 case DW_FORM_line_strp
:
20288 case DW_FORM_GNU_str_index
:
20289 case DW_FORM_GNU_strp_alt
:
20290 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
20291 DW_STRING (&die
->attrs
[i
])
20292 ? DW_STRING (&die
->attrs
[i
]) : "",
20293 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
20296 if (DW_UNSND (&die
->attrs
[i
]))
20297 fprintf_unfiltered (f
, "flag: TRUE");
20299 fprintf_unfiltered (f
, "flag: FALSE");
20301 case DW_FORM_flag_present
:
20302 fprintf_unfiltered (f
, "flag: TRUE");
20304 case DW_FORM_indirect
:
20305 /* The reader will have reduced the indirect form to
20306 the "base form" so this form should not occur. */
20307 fprintf_unfiltered (f
,
20308 "unexpected attribute form: DW_FORM_indirect");
20311 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
20312 die
->attrs
[i
].form
);
20315 fprintf_unfiltered (f
, "\n");
20320 dump_die_for_error (struct die_info
*die
)
20322 dump_die_shallow (gdb_stderr
, 0, die
);
20326 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
20328 int indent
= level
* 4;
20330 gdb_assert (die
!= NULL
);
20332 if (level
>= max_level
)
20335 dump_die_shallow (f
, indent
, die
);
20337 if (die
->child
!= NULL
)
20339 print_spaces (indent
, f
);
20340 fprintf_unfiltered (f
, " Children:");
20341 if (level
+ 1 < max_level
)
20343 fprintf_unfiltered (f
, "\n");
20344 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
20348 fprintf_unfiltered (f
,
20349 " [not printed, max nesting level reached]\n");
20353 if (die
->sibling
!= NULL
&& level
> 0)
20355 dump_die_1 (f
, level
, max_level
, die
->sibling
);
20359 /* This is called from the pdie macro in gdbinit.in.
20360 It's not static so gcc will keep a copy callable from gdb. */
20363 dump_die (struct die_info
*die
, int max_level
)
20365 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
20369 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
20373 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
.sect_off
,
20379 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
20383 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
20385 sect_offset retval
= { DW_UNSND (attr
) };
20387 if (attr_form_is_ref (attr
))
20390 retval
.sect_off
= 0;
20391 complaint (&symfile_complaints
,
20392 _("unsupported die ref attribute form: '%s'"),
20393 dwarf_form_name (attr
->form
));
20397 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
20398 * the value held by the attribute is not constant. */
20401 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
20403 if (attr
->form
== DW_FORM_sdata
)
20404 return DW_SND (attr
);
20405 else if (attr
->form
== DW_FORM_udata
20406 || attr
->form
== DW_FORM_data1
20407 || attr
->form
== DW_FORM_data2
20408 || attr
->form
== DW_FORM_data4
20409 || attr
->form
== DW_FORM_data8
)
20410 return DW_UNSND (attr
);
20413 complaint (&symfile_complaints
,
20414 _("Attribute value is not a constant (%s)"),
20415 dwarf_form_name (attr
->form
));
20416 return default_value
;
20420 /* Follow reference or signature attribute ATTR of SRC_DIE.
20421 On entry *REF_CU is the CU of SRC_DIE.
20422 On exit *REF_CU is the CU of the result. */
20424 static struct die_info
*
20425 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
20426 struct dwarf2_cu
**ref_cu
)
20428 struct die_info
*die
;
20430 if (attr_form_is_ref (attr
))
20431 die
= follow_die_ref (src_die
, attr
, ref_cu
);
20432 else if (attr
->form
== DW_FORM_ref_sig8
)
20433 die
= follow_die_sig (src_die
, attr
, ref_cu
);
20436 dump_die_for_error (src_die
);
20437 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
20438 objfile_name ((*ref_cu
)->objfile
));
20444 /* Follow reference OFFSET.
20445 On entry *REF_CU is the CU of the source die referencing OFFSET.
20446 On exit *REF_CU is the CU of the result.
20447 Returns NULL if OFFSET is invalid. */
20449 static struct die_info
*
20450 follow_die_offset (sect_offset offset
, int offset_in_dwz
,
20451 struct dwarf2_cu
**ref_cu
)
20453 struct die_info temp_die
;
20454 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
20456 gdb_assert (cu
->per_cu
!= NULL
);
20460 if (cu
->per_cu
->is_debug_types
)
20462 /* .debug_types CUs cannot reference anything outside their CU.
20463 If they need to, they have to reference a signatured type via
20464 DW_FORM_ref_sig8. */
20465 if (! offset_in_cu_p (&cu
->header
, offset
))
20468 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
20469 || ! offset_in_cu_p (&cu
->header
, offset
))
20471 struct dwarf2_per_cu_data
*per_cu
;
20473 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
20476 /* If necessary, add it to the queue and load its DIEs. */
20477 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
20478 load_full_comp_unit (per_cu
, cu
->language
);
20480 target_cu
= per_cu
->cu
;
20482 else if (cu
->dies
== NULL
)
20484 /* We're loading full DIEs during partial symbol reading. */
20485 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
20486 load_full_comp_unit (cu
->per_cu
, language_minimal
);
20489 *ref_cu
= target_cu
;
20490 temp_die
.offset
= offset
;
20491 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
20492 &temp_die
, offset
.sect_off
);
20495 /* Follow reference attribute ATTR of SRC_DIE.
20496 On entry *REF_CU is the CU of SRC_DIE.
20497 On exit *REF_CU is the CU of the result. */
20499 static struct die_info
*
20500 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
20501 struct dwarf2_cu
**ref_cu
)
20503 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
20504 struct dwarf2_cu
*cu
= *ref_cu
;
20505 struct die_info
*die
;
20507 die
= follow_die_offset (offset
,
20508 (attr
->form
== DW_FORM_GNU_ref_alt
20509 || cu
->per_cu
->is_dwz
),
20512 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
20513 "at 0x%x [in module %s]"),
20514 offset
.sect_off
, src_die
->offset
.sect_off
,
20515 objfile_name (cu
->objfile
));
20520 /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU.
20521 Returned value is intended for DW_OP_call*. Returned
20522 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
20524 struct dwarf2_locexpr_baton
20525 dwarf2_fetch_die_loc_sect_off (sect_offset offset
,
20526 struct dwarf2_per_cu_data
*per_cu
,
20527 CORE_ADDR (*get_frame_pc
) (void *baton
),
20530 struct dwarf2_cu
*cu
;
20531 struct die_info
*die
;
20532 struct attribute
*attr
;
20533 struct dwarf2_locexpr_baton retval
;
20535 dw2_setup (per_cu
->objfile
);
20537 if (per_cu
->cu
== NULL
)
20542 /* We shouldn't get here for a dummy CU, but don't crash on the user.
20543 Instead just throw an error, not much else we can do. */
20544 error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"),
20545 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20548 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
20550 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
20551 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20553 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
20556 /* DWARF: "If there is no such attribute, then there is no effect.".
20557 DATA is ignored if SIZE is 0. */
20559 retval
.data
= NULL
;
20562 else if (attr_form_is_section_offset (attr
))
20564 struct dwarf2_loclist_baton loclist_baton
;
20565 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
20568 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
20570 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
20572 retval
.size
= size
;
20576 if (!attr_form_is_block (attr
))
20577 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
20578 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
20579 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20581 retval
.data
= DW_BLOCK (attr
)->data
;
20582 retval
.size
= DW_BLOCK (attr
)->size
;
20584 retval
.per_cu
= cu
->per_cu
;
20586 age_cached_comp_units ();
20591 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
20594 struct dwarf2_locexpr_baton
20595 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
20596 struct dwarf2_per_cu_data
*per_cu
,
20597 CORE_ADDR (*get_frame_pc
) (void *baton
),
20600 sect_offset offset
= { per_cu
->offset
.sect_off
+ offset_in_cu
.cu_off
};
20602 return dwarf2_fetch_die_loc_sect_off (offset
, per_cu
, get_frame_pc
, baton
);
20605 /* Write a constant of a given type as target-ordered bytes into
20608 static const gdb_byte
*
20609 write_constant_as_bytes (struct obstack
*obstack
,
20610 enum bfd_endian byte_order
,
20617 *len
= TYPE_LENGTH (type
);
20618 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
20619 store_unsigned_integer (result
, *len
, byte_order
, value
);
20624 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
20625 pointer to the constant bytes and set LEN to the length of the
20626 data. If memory is needed, allocate it on OBSTACK. If the DIE
20627 does not have a DW_AT_const_value, return NULL. */
20630 dwarf2_fetch_constant_bytes (sect_offset offset
,
20631 struct dwarf2_per_cu_data
*per_cu
,
20632 struct obstack
*obstack
,
20635 struct dwarf2_cu
*cu
;
20636 struct die_info
*die
;
20637 struct attribute
*attr
;
20638 const gdb_byte
*result
= NULL
;
20641 enum bfd_endian byte_order
;
20643 dw2_setup (per_cu
->objfile
);
20645 if (per_cu
->cu
== NULL
)
20650 /* We shouldn't get here for a dummy CU, but don't crash on the user.
20651 Instead just throw an error, not much else we can do. */
20652 error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"),
20653 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20656 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
20658 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
20659 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20662 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20666 byte_order
= (bfd_big_endian (per_cu
->objfile
->obfd
)
20667 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
20669 switch (attr
->form
)
20672 case DW_FORM_GNU_addr_index
:
20676 *len
= cu
->header
.addr_size
;
20677 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
20678 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
20682 case DW_FORM_string
:
20684 case DW_FORM_GNU_str_index
:
20685 case DW_FORM_GNU_strp_alt
:
20686 /* DW_STRING is already allocated on the objfile obstack, point
20688 result
= (const gdb_byte
*) DW_STRING (attr
);
20689 *len
= strlen (DW_STRING (attr
));
20691 case DW_FORM_block1
:
20692 case DW_FORM_block2
:
20693 case DW_FORM_block4
:
20694 case DW_FORM_block
:
20695 case DW_FORM_exprloc
:
20696 result
= DW_BLOCK (attr
)->data
;
20697 *len
= DW_BLOCK (attr
)->size
;
20700 /* The DW_AT_const_value attributes are supposed to carry the
20701 symbol's value "represented as it would be on the target
20702 architecture." By the time we get here, it's already been
20703 converted to host endianness, so we just need to sign- or
20704 zero-extend it as appropriate. */
20705 case DW_FORM_data1
:
20706 type
= die_type (die
, cu
);
20707 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
20708 if (result
== NULL
)
20709 result
= write_constant_as_bytes (obstack
, byte_order
,
20712 case DW_FORM_data2
:
20713 type
= die_type (die
, cu
);
20714 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
20715 if (result
== NULL
)
20716 result
= write_constant_as_bytes (obstack
, byte_order
,
20719 case DW_FORM_data4
:
20720 type
= die_type (die
, cu
);
20721 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
20722 if (result
== NULL
)
20723 result
= write_constant_as_bytes (obstack
, byte_order
,
20726 case DW_FORM_data8
:
20727 type
= die_type (die
, cu
);
20728 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
20729 if (result
== NULL
)
20730 result
= write_constant_as_bytes (obstack
, byte_order
,
20734 case DW_FORM_sdata
:
20735 type
= die_type (die
, cu
);
20736 result
= write_constant_as_bytes (obstack
, byte_order
,
20737 type
, DW_SND (attr
), len
);
20740 case DW_FORM_udata
:
20741 type
= die_type (die
, cu
);
20742 result
= write_constant_as_bytes (obstack
, byte_order
,
20743 type
, DW_UNSND (attr
), len
);
20747 complaint (&symfile_complaints
,
20748 _("unsupported const value attribute form: '%s'"),
20749 dwarf_form_name (attr
->form
));
20756 /* Return the type of the DIE at DIE_OFFSET in the CU named by
20760 dwarf2_get_die_type (cu_offset die_offset
,
20761 struct dwarf2_per_cu_data
*per_cu
)
20763 sect_offset die_offset_sect
;
20765 dw2_setup (per_cu
->objfile
);
20767 die_offset_sect
.sect_off
= per_cu
->offset
.sect_off
+ die_offset
.cu_off
;
20768 return get_die_type_at_offset (die_offset_sect
, per_cu
);
20771 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
20772 On entry *REF_CU is the CU of SRC_DIE.
20773 On exit *REF_CU is the CU of the result.
20774 Returns NULL if the referenced DIE isn't found. */
20776 static struct die_info
*
20777 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
20778 struct dwarf2_cu
**ref_cu
)
20780 struct die_info temp_die
;
20781 struct dwarf2_cu
*sig_cu
;
20782 struct die_info
*die
;
20784 /* While it might be nice to assert sig_type->type == NULL here,
20785 we can get here for DW_AT_imported_declaration where we need
20786 the DIE not the type. */
20788 /* If necessary, add it to the queue and load its DIEs. */
20790 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
20791 read_signatured_type (sig_type
);
20793 sig_cu
= sig_type
->per_cu
.cu
;
20794 gdb_assert (sig_cu
!= NULL
);
20795 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
20796 temp_die
.offset
= sig_type
->type_offset_in_section
;
20797 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
20798 temp_die
.offset
.sect_off
);
20801 /* For .gdb_index version 7 keep track of included TUs.
20802 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
20803 if (dwarf2_per_objfile
->index_table
!= NULL
20804 && dwarf2_per_objfile
->index_table
->version
<= 7)
20806 VEC_safe_push (dwarf2_per_cu_ptr
,
20807 (*ref_cu
)->per_cu
->imported_symtabs
,
20818 /* Follow signatured type referenced by ATTR in SRC_DIE.
20819 On entry *REF_CU is the CU of SRC_DIE.
20820 On exit *REF_CU is the CU of the result.
20821 The result is the DIE of the type.
20822 If the referenced type cannot be found an error is thrown. */
20824 static struct die_info
*
20825 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
20826 struct dwarf2_cu
**ref_cu
)
20828 ULONGEST signature
= DW_SIGNATURE (attr
);
20829 struct signatured_type
*sig_type
;
20830 struct die_info
*die
;
20832 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
20834 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
20835 /* sig_type will be NULL if the signatured type is missing from
20837 if (sig_type
== NULL
)
20839 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
20840 " from DIE at 0x%x [in module %s]"),
20841 hex_string (signature
), src_die
->offset
.sect_off
,
20842 objfile_name ((*ref_cu
)->objfile
));
20845 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
20848 dump_die_for_error (src_die
);
20849 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
20850 " from DIE at 0x%x [in module %s]"),
20851 hex_string (signature
), src_die
->offset
.sect_off
,
20852 objfile_name ((*ref_cu
)->objfile
));
20858 /* Get the type specified by SIGNATURE referenced in DIE/CU,
20859 reading in and processing the type unit if necessary. */
20861 static struct type
*
20862 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
20863 struct dwarf2_cu
*cu
)
20865 struct signatured_type
*sig_type
;
20866 struct dwarf2_cu
*type_cu
;
20867 struct die_info
*type_die
;
20870 sig_type
= lookup_signatured_type (cu
, signature
);
20871 /* sig_type will be NULL if the signatured type is missing from
20873 if (sig_type
== NULL
)
20875 complaint (&symfile_complaints
,
20876 _("Dwarf Error: Cannot find signatured DIE %s referenced"
20877 " from DIE at 0x%x [in module %s]"),
20878 hex_string (signature
), die
->offset
.sect_off
,
20879 objfile_name (dwarf2_per_objfile
->objfile
));
20880 return build_error_marker_type (cu
, die
);
20883 /* If we already know the type we're done. */
20884 if (sig_type
->type
!= NULL
)
20885 return sig_type
->type
;
20888 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
20889 if (type_die
!= NULL
)
20891 /* N.B. We need to call get_die_type to ensure only one type for this DIE
20892 is created. This is important, for example, because for c++ classes
20893 we need TYPE_NAME set which is only done by new_symbol. Blech. */
20894 type
= read_type_die (type_die
, type_cu
);
20897 complaint (&symfile_complaints
,
20898 _("Dwarf Error: Cannot build signatured type %s"
20899 " referenced from DIE at 0x%x [in module %s]"),
20900 hex_string (signature
), die
->offset
.sect_off
,
20901 objfile_name (dwarf2_per_objfile
->objfile
));
20902 type
= build_error_marker_type (cu
, die
);
20907 complaint (&symfile_complaints
,
20908 _("Dwarf Error: Problem reading signatured DIE %s referenced"
20909 " from DIE at 0x%x [in module %s]"),
20910 hex_string (signature
), die
->offset
.sect_off
,
20911 objfile_name (dwarf2_per_objfile
->objfile
));
20912 type
= build_error_marker_type (cu
, die
);
20914 sig_type
->type
= type
;
20919 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
20920 reading in and processing the type unit if necessary. */
20922 static struct type
*
20923 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
20924 struct dwarf2_cu
*cu
) /* ARI: editCase function */
20926 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
20927 if (attr_form_is_ref (attr
))
20929 struct dwarf2_cu
*type_cu
= cu
;
20930 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
20932 return read_type_die (type_die
, type_cu
);
20934 else if (attr
->form
== DW_FORM_ref_sig8
)
20936 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
20940 complaint (&symfile_complaints
,
20941 _("Dwarf Error: DW_AT_signature has bad form %s in DIE"
20942 " at 0x%x [in module %s]"),
20943 dwarf_form_name (attr
->form
), die
->offset
.sect_off
,
20944 objfile_name (dwarf2_per_objfile
->objfile
));
20945 return build_error_marker_type (cu
, die
);
20949 /* Load the DIEs associated with type unit PER_CU into memory. */
20952 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
20954 struct signatured_type
*sig_type
;
20956 /* Caller is responsible for ensuring type_unit_groups don't get here. */
20957 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
20959 /* We have the per_cu, but we need the signatured_type.
20960 Fortunately this is an easy translation. */
20961 gdb_assert (per_cu
->is_debug_types
);
20962 sig_type
= (struct signatured_type
*) per_cu
;
20964 gdb_assert (per_cu
->cu
== NULL
);
20966 read_signatured_type (sig_type
);
20968 gdb_assert (per_cu
->cu
!= NULL
);
20971 /* die_reader_func for read_signatured_type.
20972 This is identical to load_full_comp_unit_reader,
20973 but is kept separate for now. */
20976 read_signatured_type_reader (const struct die_reader_specs
*reader
,
20977 const gdb_byte
*info_ptr
,
20978 struct die_info
*comp_unit_die
,
20982 struct dwarf2_cu
*cu
= reader
->cu
;
20984 gdb_assert (cu
->die_hash
== NULL
);
20986 htab_create_alloc_ex (cu
->header
.length
/ 12,
20990 &cu
->comp_unit_obstack
,
20991 hashtab_obstack_allocate
,
20992 dummy_obstack_deallocate
);
20995 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
20996 &info_ptr
, comp_unit_die
);
20997 cu
->dies
= comp_unit_die
;
20998 /* comp_unit_die is not stored in die_hash, no need. */
21000 /* We try not to read any attributes in this function, because not
21001 all CUs needed for references have been loaded yet, and symbol
21002 table processing isn't initialized. But we have to set the CU language,
21003 or we won't be able to build types correctly.
21004 Similarly, if we do not read the producer, we can not apply
21005 producer-specific interpretation. */
21006 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
21009 /* Read in a signatured type and build its CU and DIEs.
21010 If the type is a stub for the real type in a DWO file,
21011 read in the real type from the DWO file as well. */
21014 read_signatured_type (struct signatured_type
*sig_type
)
21016 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
21018 gdb_assert (per_cu
->is_debug_types
);
21019 gdb_assert (per_cu
->cu
== NULL
);
21021 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
21022 read_signatured_type_reader
, NULL
);
21023 sig_type
->per_cu
.tu_read
= 1;
21026 /* Decode simple location descriptions.
21027 Given a pointer to a dwarf block that defines a location, compute
21028 the location and return the value.
21030 NOTE drow/2003-11-18: This function is called in two situations
21031 now: for the address of static or global variables (partial symbols
21032 only) and for offsets into structures which are expected to be
21033 (more or less) constant. The partial symbol case should go away,
21034 and only the constant case should remain. That will let this
21035 function complain more accurately. A few special modes are allowed
21036 without complaint for global variables (for instance, global
21037 register values and thread-local values).
21039 A location description containing no operations indicates that the
21040 object is optimized out. The return value is 0 for that case.
21041 FIXME drow/2003-11-16: No callers check for this case any more; soon all
21042 callers will only want a very basic result and this can become a
21045 Note that stack[0] is unused except as a default error return. */
21048 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
21050 struct objfile
*objfile
= cu
->objfile
;
21052 size_t size
= blk
->size
;
21053 const gdb_byte
*data
= blk
->data
;
21054 CORE_ADDR stack
[64];
21056 unsigned int bytes_read
, unsnd
;
21062 stack
[++stacki
] = 0;
21101 stack
[++stacki
] = op
- DW_OP_lit0
;
21136 stack
[++stacki
] = op
- DW_OP_reg0
;
21138 dwarf2_complex_location_expr_complaint ();
21142 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
21144 stack
[++stacki
] = unsnd
;
21146 dwarf2_complex_location_expr_complaint ();
21150 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
21155 case DW_OP_const1u
:
21156 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
21160 case DW_OP_const1s
:
21161 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
21165 case DW_OP_const2u
:
21166 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
21170 case DW_OP_const2s
:
21171 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
21175 case DW_OP_const4u
:
21176 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
21180 case DW_OP_const4s
:
21181 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
21185 case DW_OP_const8u
:
21186 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
21191 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
21197 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
21202 stack
[stacki
+ 1] = stack
[stacki
];
21207 stack
[stacki
- 1] += stack
[stacki
];
21211 case DW_OP_plus_uconst
:
21212 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
21218 stack
[stacki
- 1] -= stack
[stacki
];
21223 /* If we're not the last op, then we definitely can't encode
21224 this using GDB's address_class enum. This is valid for partial
21225 global symbols, although the variable's address will be bogus
21228 dwarf2_complex_location_expr_complaint ();
21231 case DW_OP_GNU_push_tls_address
:
21232 case DW_OP_form_tls_address
:
21233 /* The top of the stack has the offset from the beginning
21234 of the thread control block at which the variable is located. */
21235 /* Nothing should follow this operator, so the top of stack would
21237 /* This is valid for partial global symbols, but the variable's
21238 address will be bogus in the psymtab. Make it always at least
21239 non-zero to not look as a variable garbage collected by linker
21240 which have DW_OP_addr 0. */
21242 dwarf2_complex_location_expr_complaint ();
21246 case DW_OP_GNU_uninit
:
21249 case DW_OP_GNU_addr_index
:
21250 case DW_OP_GNU_const_index
:
21251 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
21258 const char *name
= get_DW_OP_name (op
);
21261 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
21264 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
21268 return (stack
[stacki
]);
21271 /* Enforce maximum stack depth of SIZE-1 to avoid writing
21272 outside of the allocated space. Also enforce minimum>0. */
21273 if (stacki
>= ARRAY_SIZE (stack
) - 1)
21275 complaint (&symfile_complaints
,
21276 _("location description stack overflow"));
21282 complaint (&symfile_complaints
,
21283 _("location description stack underflow"));
21287 return (stack
[stacki
]);
21290 /* memory allocation interface */
21292 static struct dwarf_block
*
21293 dwarf_alloc_block (struct dwarf2_cu
*cu
)
21295 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
21298 static struct die_info
*
21299 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
21301 struct die_info
*die
;
21302 size_t size
= sizeof (struct die_info
);
21305 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
21307 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
21308 memset (die
, 0, sizeof (struct die_info
));
21313 /* Macro support. */
21315 /* Return file name relative to the compilation directory of file number I in
21316 *LH's file name table. The result is allocated using xmalloc; the caller is
21317 responsible for freeing it. */
21320 file_file_name (int file
, struct line_header
*lh
)
21322 /* Is the file number a valid index into the line header's file name
21323 table? Remember that file numbers start with one, not zero. */
21324 if (1 <= file
&& file
<= lh
->num_file_names
)
21326 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
21328 if (IS_ABSOLUTE_PATH (fe
->name
) || fe
->dir_index
== 0
21329 || lh
->include_dirs
== NULL
)
21330 return xstrdup (fe
->name
);
21331 return concat (lh
->include_dirs
[fe
->dir_index
- 1], SLASH_STRING
,
21332 fe
->name
, (char *) NULL
);
21336 /* The compiler produced a bogus file number. We can at least
21337 record the macro definitions made in the file, even if we
21338 won't be able to find the file by name. */
21339 char fake_name
[80];
21341 xsnprintf (fake_name
, sizeof (fake_name
),
21342 "<bad macro file number %d>", file
);
21344 complaint (&symfile_complaints
,
21345 _("bad file number in macro information (%d)"),
21348 return xstrdup (fake_name
);
21352 /* Return the full name of file number I in *LH's file name table.
21353 Use COMP_DIR as the name of the current directory of the
21354 compilation. The result is allocated using xmalloc; the caller is
21355 responsible for freeing it. */
21357 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
21359 /* Is the file number a valid index into the line header's file name
21360 table? Remember that file numbers start with one, not zero. */
21361 if (1 <= file
&& file
<= lh
->num_file_names
)
21363 char *relative
= file_file_name (file
, lh
);
21365 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
21367 return reconcat (relative
, comp_dir
, SLASH_STRING
,
21368 relative
, (char *) NULL
);
21371 return file_file_name (file
, lh
);
21375 static struct macro_source_file
*
21376 macro_start_file (int file
, int line
,
21377 struct macro_source_file
*current_file
,
21378 struct line_header
*lh
)
21380 /* File name relative to the compilation directory of this source file. */
21381 char *file_name
= file_file_name (file
, lh
);
21383 if (! current_file
)
21385 /* Note: We don't create a macro table for this compilation unit
21386 at all until we actually get a filename. */
21387 struct macro_table
*macro_table
= get_macro_table ();
21389 /* If we have no current file, then this must be the start_file
21390 directive for the compilation unit's main source file. */
21391 current_file
= macro_set_main (macro_table
, file_name
);
21392 macro_define_special (macro_table
);
21395 current_file
= macro_include (current_file
, line
, file_name
);
21399 return current_file
;
21403 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
21404 followed by a null byte. */
21406 copy_string (const char *buf
, int len
)
21408 char *s
= (char *) xmalloc (len
+ 1);
21410 memcpy (s
, buf
, len
);
21416 static const char *
21417 consume_improper_spaces (const char *p
, const char *body
)
21421 complaint (&symfile_complaints
,
21422 _("macro definition contains spaces "
21423 "in formal argument list:\n`%s'"),
21435 parse_macro_definition (struct macro_source_file
*file
, int line
,
21440 /* The body string takes one of two forms. For object-like macro
21441 definitions, it should be:
21443 <macro name> " " <definition>
21445 For function-like macro definitions, it should be:
21447 <macro name> "() " <definition>
21449 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
21451 Spaces may appear only where explicitly indicated, and in the
21454 The Dwarf 2 spec says that an object-like macro's name is always
21455 followed by a space, but versions of GCC around March 2002 omit
21456 the space when the macro's definition is the empty string.
21458 The Dwarf 2 spec says that there should be no spaces between the
21459 formal arguments in a function-like macro's formal argument list,
21460 but versions of GCC around March 2002 include spaces after the
21464 /* Find the extent of the macro name. The macro name is terminated
21465 by either a space or null character (for an object-like macro) or
21466 an opening paren (for a function-like macro). */
21467 for (p
= body
; *p
; p
++)
21468 if (*p
== ' ' || *p
== '(')
21471 if (*p
== ' ' || *p
== '\0')
21473 /* It's an object-like macro. */
21474 int name_len
= p
- body
;
21475 char *name
= copy_string (body
, name_len
);
21476 const char *replacement
;
21479 replacement
= body
+ name_len
+ 1;
21482 dwarf2_macro_malformed_definition_complaint (body
);
21483 replacement
= body
+ name_len
;
21486 macro_define_object (file
, line
, name
, replacement
);
21490 else if (*p
== '(')
21492 /* It's a function-like macro. */
21493 char *name
= copy_string (body
, p
- body
);
21496 char **argv
= XNEWVEC (char *, argv_size
);
21500 p
= consume_improper_spaces (p
, body
);
21502 /* Parse the formal argument list. */
21503 while (*p
&& *p
!= ')')
21505 /* Find the extent of the current argument name. */
21506 const char *arg_start
= p
;
21508 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
21511 if (! *p
|| p
== arg_start
)
21512 dwarf2_macro_malformed_definition_complaint (body
);
21515 /* Make sure argv has room for the new argument. */
21516 if (argc
>= argv_size
)
21519 argv
= XRESIZEVEC (char *, argv
, argv_size
);
21522 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
21525 p
= consume_improper_spaces (p
, body
);
21527 /* Consume the comma, if present. */
21532 p
= consume_improper_spaces (p
, body
);
21541 /* Perfectly formed definition, no complaints. */
21542 macro_define_function (file
, line
, name
,
21543 argc
, (const char **) argv
,
21545 else if (*p
== '\0')
21547 /* Complain, but do define it. */
21548 dwarf2_macro_malformed_definition_complaint (body
);
21549 macro_define_function (file
, line
, name
,
21550 argc
, (const char **) argv
,
21554 /* Just complain. */
21555 dwarf2_macro_malformed_definition_complaint (body
);
21558 /* Just complain. */
21559 dwarf2_macro_malformed_definition_complaint (body
);
21565 for (i
= 0; i
< argc
; i
++)
21571 dwarf2_macro_malformed_definition_complaint (body
);
21574 /* Skip some bytes from BYTES according to the form given in FORM.
21575 Returns the new pointer. */
21577 static const gdb_byte
*
21578 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
21579 enum dwarf_form form
,
21580 unsigned int offset_size
,
21581 struct dwarf2_section_info
*section
)
21583 unsigned int bytes_read
;
21587 case DW_FORM_data1
:
21592 case DW_FORM_data2
:
21596 case DW_FORM_data4
:
21600 case DW_FORM_data8
:
21604 case DW_FORM_string
:
21605 read_direct_string (abfd
, bytes
, &bytes_read
);
21606 bytes
+= bytes_read
;
21609 case DW_FORM_sec_offset
:
21611 case DW_FORM_GNU_strp_alt
:
21612 bytes
+= offset_size
;
21615 case DW_FORM_block
:
21616 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
21617 bytes
+= bytes_read
;
21620 case DW_FORM_block1
:
21621 bytes
+= 1 + read_1_byte (abfd
, bytes
);
21623 case DW_FORM_block2
:
21624 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
21626 case DW_FORM_block4
:
21627 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
21630 case DW_FORM_sdata
:
21631 case DW_FORM_udata
:
21632 case DW_FORM_GNU_addr_index
:
21633 case DW_FORM_GNU_str_index
:
21634 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
21637 dwarf2_section_buffer_overflow_complaint (section
);
21645 complaint (&symfile_complaints
,
21646 _("invalid form 0x%x in `%s'"),
21647 form
, get_section_name (section
));
21655 /* A helper for dwarf_decode_macros that handles skipping an unknown
21656 opcode. Returns an updated pointer to the macro data buffer; or,
21657 on error, issues a complaint and returns NULL. */
21659 static const gdb_byte
*
21660 skip_unknown_opcode (unsigned int opcode
,
21661 const gdb_byte
**opcode_definitions
,
21662 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
21664 unsigned int offset_size
,
21665 struct dwarf2_section_info
*section
)
21667 unsigned int bytes_read
, i
;
21669 const gdb_byte
*defn
;
21671 if (opcode_definitions
[opcode
] == NULL
)
21673 complaint (&symfile_complaints
,
21674 _("unrecognized DW_MACFINO opcode 0x%x"),
21679 defn
= opcode_definitions
[opcode
];
21680 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
21681 defn
+= bytes_read
;
21683 for (i
= 0; i
< arg
; ++i
)
21685 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
,
21686 (enum dwarf_form
) defn
[i
], offset_size
,
21688 if (mac_ptr
== NULL
)
21690 /* skip_form_bytes already issued the complaint. */
21698 /* A helper function which parses the header of a macro section.
21699 If the macro section is the extended (for now called "GNU") type,
21700 then this updates *OFFSET_SIZE. Returns a pointer to just after
21701 the header, or issues a complaint and returns NULL on error. */
21703 static const gdb_byte
*
21704 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
21706 const gdb_byte
*mac_ptr
,
21707 unsigned int *offset_size
,
21708 int section_is_gnu
)
21710 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
21712 if (section_is_gnu
)
21714 unsigned int version
, flags
;
21716 version
= read_2_bytes (abfd
, mac_ptr
);
21719 complaint (&symfile_complaints
,
21720 _("unrecognized version `%d' in .debug_macro section"),
21726 flags
= read_1_byte (abfd
, mac_ptr
);
21728 *offset_size
= (flags
& 1) ? 8 : 4;
21730 if ((flags
& 2) != 0)
21731 /* We don't need the line table offset. */
21732 mac_ptr
+= *offset_size
;
21734 /* Vendor opcode descriptions. */
21735 if ((flags
& 4) != 0)
21737 unsigned int i
, count
;
21739 count
= read_1_byte (abfd
, mac_ptr
);
21741 for (i
= 0; i
< count
; ++i
)
21743 unsigned int opcode
, bytes_read
;
21746 opcode
= read_1_byte (abfd
, mac_ptr
);
21748 opcode_definitions
[opcode
] = mac_ptr
;
21749 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21750 mac_ptr
+= bytes_read
;
21759 /* A helper for dwarf_decode_macros that handles the GNU extensions,
21760 including DW_MACRO_GNU_transparent_include. */
21763 dwarf_decode_macro_bytes (bfd
*abfd
,
21764 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
21765 struct macro_source_file
*current_file
,
21766 struct line_header
*lh
,
21767 struct dwarf2_section_info
*section
,
21768 int section_is_gnu
, int section_is_dwz
,
21769 unsigned int offset_size
,
21770 htab_t include_hash
)
21772 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21773 enum dwarf_macro_record_type macinfo_type
;
21774 int at_commandline
;
21775 const gdb_byte
*opcode_definitions
[256];
21777 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
21778 &offset_size
, section_is_gnu
);
21779 if (mac_ptr
== NULL
)
21781 /* We already issued a complaint. */
21785 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
21786 GDB is still reading the definitions from command line. First
21787 DW_MACINFO_start_file will need to be ignored as it was already executed
21788 to create CURRENT_FILE for the main source holding also the command line
21789 definitions. On first met DW_MACINFO_start_file this flag is reset to
21790 normally execute all the remaining DW_MACINFO_start_file macinfos. */
21792 at_commandline
= 1;
21796 /* Do we at least have room for a macinfo type byte? */
21797 if (mac_ptr
>= mac_end
)
21799 dwarf2_section_buffer_overflow_complaint (section
);
21803 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
21806 /* Note that we rely on the fact that the corresponding GNU and
21807 DWARF constants are the same. */
21808 switch (macinfo_type
)
21810 /* A zero macinfo type indicates the end of the macro
21815 case DW_MACRO_GNU_define
:
21816 case DW_MACRO_GNU_undef
:
21817 case DW_MACRO_GNU_define_indirect
:
21818 case DW_MACRO_GNU_undef_indirect
:
21819 case DW_MACRO_GNU_define_indirect_alt
:
21820 case DW_MACRO_GNU_undef_indirect_alt
:
21822 unsigned int bytes_read
;
21827 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21828 mac_ptr
+= bytes_read
;
21830 if (macinfo_type
== DW_MACRO_GNU_define
21831 || macinfo_type
== DW_MACRO_GNU_undef
)
21833 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21834 mac_ptr
+= bytes_read
;
21838 LONGEST str_offset
;
21840 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
21841 mac_ptr
+= offset_size
;
21843 if (macinfo_type
== DW_MACRO_GNU_define_indirect_alt
21844 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
21847 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
21849 body
= read_indirect_string_from_dwz (dwz
, str_offset
);
21852 body
= read_indirect_string_at_offset (abfd
, str_offset
);
21855 is_define
= (macinfo_type
== DW_MACRO_GNU_define
21856 || macinfo_type
== DW_MACRO_GNU_define_indirect
21857 || macinfo_type
== DW_MACRO_GNU_define_indirect_alt
);
21858 if (! current_file
)
21860 /* DWARF violation as no main source is present. */
21861 complaint (&symfile_complaints
,
21862 _("debug info with no main source gives macro %s "
21864 is_define
? _("definition") : _("undefinition"),
21868 if ((line
== 0 && !at_commandline
)
21869 || (line
!= 0 && at_commandline
))
21870 complaint (&symfile_complaints
,
21871 _("debug info gives %s macro %s with %s line %d: %s"),
21872 at_commandline
? _("command-line") : _("in-file"),
21873 is_define
? _("definition") : _("undefinition"),
21874 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
21877 parse_macro_definition (current_file
, line
, body
);
21880 gdb_assert (macinfo_type
== DW_MACRO_GNU_undef
21881 || macinfo_type
== DW_MACRO_GNU_undef_indirect
21882 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
);
21883 macro_undef (current_file
, line
, body
);
21888 case DW_MACRO_GNU_start_file
:
21890 unsigned int bytes_read
;
21893 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21894 mac_ptr
+= bytes_read
;
21895 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21896 mac_ptr
+= bytes_read
;
21898 if ((line
== 0 && !at_commandline
)
21899 || (line
!= 0 && at_commandline
))
21900 complaint (&symfile_complaints
,
21901 _("debug info gives source %d included "
21902 "from %s at %s line %d"),
21903 file
, at_commandline
? _("command-line") : _("file"),
21904 line
== 0 ? _("zero") : _("non-zero"), line
);
21906 if (at_commandline
)
21908 /* This DW_MACRO_GNU_start_file was executed in the
21910 at_commandline
= 0;
21913 current_file
= macro_start_file (file
, line
, current_file
, lh
);
21917 case DW_MACRO_GNU_end_file
:
21918 if (! current_file
)
21919 complaint (&symfile_complaints
,
21920 _("macro debug info has an unmatched "
21921 "`close_file' directive"));
21924 current_file
= current_file
->included_by
;
21925 if (! current_file
)
21927 enum dwarf_macro_record_type next_type
;
21929 /* GCC circa March 2002 doesn't produce the zero
21930 type byte marking the end of the compilation
21931 unit. Complain if it's not there, but exit no
21934 /* Do we at least have room for a macinfo type byte? */
21935 if (mac_ptr
>= mac_end
)
21937 dwarf2_section_buffer_overflow_complaint (section
);
21941 /* We don't increment mac_ptr here, so this is just
21944 = (enum dwarf_macro_record_type
) read_1_byte (abfd
,
21946 if (next_type
!= 0)
21947 complaint (&symfile_complaints
,
21948 _("no terminating 0-type entry for "
21949 "macros in `.debug_macinfo' section"));
21956 case DW_MACRO_GNU_transparent_include
:
21957 case DW_MACRO_GNU_transparent_include_alt
:
21961 bfd
*include_bfd
= abfd
;
21962 struct dwarf2_section_info
*include_section
= section
;
21963 const gdb_byte
*include_mac_end
= mac_end
;
21964 int is_dwz
= section_is_dwz
;
21965 const gdb_byte
*new_mac_ptr
;
21967 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
21968 mac_ptr
+= offset_size
;
21970 if (macinfo_type
== DW_MACRO_GNU_transparent_include_alt
)
21972 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
21974 dwarf2_read_section (objfile
, &dwz
->macro
);
21976 include_section
= &dwz
->macro
;
21977 include_bfd
= get_section_bfd_owner (include_section
);
21978 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
21982 new_mac_ptr
= include_section
->buffer
+ offset
;
21983 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
21987 /* This has actually happened; see
21988 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
21989 complaint (&symfile_complaints
,
21990 _("recursive DW_MACRO_GNU_transparent_include in "
21991 ".debug_macro section"));
21995 *slot
= (void *) new_mac_ptr
;
21997 dwarf_decode_macro_bytes (include_bfd
, new_mac_ptr
,
21998 include_mac_end
, current_file
, lh
,
21999 section
, section_is_gnu
, is_dwz
,
22000 offset_size
, include_hash
);
22002 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
22007 case DW_MACINFO_vendor_ext
:
22008 if (!section_is_gnu
)
22010 unsigned int bytes_read
;
22012 /* This reads the constant, but since we don't recognize
22013 any vendor extensions, we ignore it. */
22014 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22015 mac_ptr
+= bytes_read
;
22016 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
22017 mac_ptr
+= bytes_read
;
22019 /* We don't recognize any vendor extensions. */
22025 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
22026 mac_ptr
, mac_end
, abfd
, offset_size
,
22028 if (mac_ptr
== NULL
)
22032 } while (macinfo_type
!= 0);
22036 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
22037 int section_is_gnu
)
22039 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22040 struct line_header
*lh
= cu
->line_header
;
22042 const gdb_byte
*mac_ptr
, *mac_end
;
22043 struct macro_source_file
*current_file
= 0;
22044 enum dwarf_macro_record_type macinfo_type
;
22045 unsigned int offset_size
= cu
->header
.offset_size
;
22046 const gdb_byte
*opcode_definitions
[256];
22047 struct cleanup
*cleanup
;
22049 struct dwarf2_section_info
*section
;
22050 const char *section_name
;
22052 if (cu
->dwo_unit
!= NULL
)
22054 if (section_is_gnu
)
22056 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
22057 section_name
= ".debug_macro.dwo";
22061 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
22062 section_name
= ".debug_macinfo.dwo";
22067 if (section_is_gnu
)
22069 section
= &dwarf2_per_objfile
->macro
;
22070 section_name
= ".debug_macro";
22074 section
= &dwarf2_per_objfile
->macinfo
;
22075 section_name
= ".debug_macinfo";
22079 dwarf2_read_section (objfile
, section
);
22080 if (section
->buffer
== NULL
)
22082 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
22085 abfd
= get_section_bfd_owner (section
);
22087 /* First pass: Find the name of the base filename.
22088 This filename is needed in order to process all macros whose definition
22089 (or undefinition) comes from the command line. These macros are defined
22090 before the first DW_MACINFO_start_file entry, and yet still need to be
22091 associated to the base file.
22093 To determine the base file name, we scan the macro definitions until we
22094 reach the first DW_MACINFO_start_file entry. We then initialize
22095 CURRENT_FILE accordingly so that any macro definition found before the
22096 first DW_MACINFO_start_file can still be associated to the base file. */
22098 mac_ptr
= section
->buffer
+ offset
;
22099 mac_end
= section
->buffer
+ section
->size
;
22101 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
22102 &offset_size
, section_is_gnu
);
22103 if (mac_ptr
== NULL
)
22105 /* We already issued a complaint. */
22111 /* Do we at least have room for a macinfo type byte? */
22112 if (mac_ptr
>= mac_end
)
22114 /* Complaint is printed during the second pass as GDB will probably
22115 stop the first pass earlier upon finding
22116 DW_MACINFO_start_file. */
22120 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
22123 /* Note that we rely on the fact that the corresponding GNU and
22124 DWARF constants are the same. */
22125 switch (macinfo_type
)
22127 /* A zero macinfo type indicates the end of the macro
22132 case DW_MACRO_GNU_define
:
22133 case DW_MACRO_GNU_undef
:
22134 /* Only skip the data by MAC_PTR. */
22136 unsigned int bytes_read
;
22138 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22139 mac_ptr
+= bytes_read
;
22140 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
22141 mac_ptr
+= bytes_read
;
22145 case DW_MACRO_GNU_start_file
:
22147 unsigned int bytes_read
;
22150 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22151 mac_ptr
+= bytes_read
;
22152 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22153 mac_ptr
+= bytes_read
;
22155 current_file
= macro_start_file (file
, line
, current_file
, lh
);
22159 case DW_MACRO_GNU_end_file
:
22160 /* No data to skip by MAC_PTR. */
22163 case DW_MACRO_GNU_define_indirect
:
22164 case DW_MACRO_GNU_undef_indirect
:
22165 case DW_MACRO_GNU_define_indirect_alt
:
22166 case DW_MACRO_GNU_undef_indirect_alt
:
22168 unsigned int bytes_read
;
22170 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22171 mac_ptr
+= bytes_read
;
22172 mac_ptr
+= offset_size
;
22176 case DW_MACRO_GNU_transparent_include
:
22177 case DW_MACRO_GNU_transparent_include_alt
:
22178 /* Note that, according to the spec, a transparent include
22179 chain cannot call DW_MACRO_GNU_start_file. So, we can just
22180 skip this opcode. */
22181 mac_ptr
+= offset_size
;
22184 case DW_MACINFO_vendor_ext
:
22185 /* Only skip the data by MAC_PTR. */
22186 if (!section_is_gnu
)
22188 unsigned int bytes_read
;
22190 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22191 mac_ptr
+= bytes_read
;
22192 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
22193 mac_ptr
+= bytes_read
;
22198 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
22199 mac_ptr
, mac_end
, abfd
, offset_size
,
22201 if (mac_ptr
== NULL
)
22205 } while (macinfo_type
!= 0 && current_file
== NULL
);
22207 /* Second pass: Process all entries.
22209 Use the AT_COMMAND_LINE flag to determine whether we are still processing
22210 command-line macro definitions/undefinitions. This flag is unset when we
22211 reach the first DW_MACINFO_start_file entry. */
22213 htab_up
include_hash (htab_create_alloc (1, htab_hash_pointer
,
22215 NULL
, xcalloc
, xfree
));
22216 mac_ptr
= section
->buffer
+ offset
;
22217 slot
= htab_find_slot (include_hash
.get (), mac_ptr
, INSERT
);
22218 *slot
= (void *) mac_ptr
;
22219 dwarf_decode_macro_bytes (abfd
, mac_ptr
, mac_end
,
22220 current_file
, lh
, section
,
22221 section_is_gnu
, 0, offset_size
,
22222 include_hash
.get ());
22225 /* Check if the attribute's form is a DW_FORM_block*
22226 if so return true else false. */
22229 attr_form_is_block (const struct attribute
*attr
)
22231 return (attr
== NULL
? 0 :
22232 attr
->form
== DW_FORM_block1
22233 || attr
->form
== DW_FORM_block2
22234 || attr
->form
== DW_FORM_block4
22235 || attr
->form
== DW_FORM_block
22236 || attr
->form
== DW_FORM_exprloc
);
22239 /* Return non-zero if ATTR's value is a section offset --- classes
22240 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
22241 You may use DW_UNSND (attr) to retrieve such offsets.
22243 Section 7.5.4, "Attribute Encodings", explains that no attribute
22244 may have a value that belongs to more than one of these classes; it
22245 would be ambiguous if we did, because we use the same forms for all
22249 attr_form_is_section_offset (const struct attribute
*attr
)
22251 return (attr
->form
== DW_FORM_data4
22252 || attr
->form
== DW_FORM_data8
22253 || attr
->form
== DW_FORM_sec_offset
);
22256 /* Return non-zero if ATTR's value falls in the 'constant' class, or
22257 zero otherwise. When this function returns true, you can apply
22258 dwarf2_get_attr_constant_value to it.
22260 However, note that for some attributes you must check
22261 attr_form_is_section_offset before using this test. DW_FORM_data4
22262 and DW_FORM_data8 are members of both the constant class, and of
22263 the classes that contain offsets into other debug sections
22264 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
22265 that, if an attribute's can be either a constant or one of the
22266 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
22267 taken as section offsets, not constants. */
22270 attr_form_is_constant (const struct attribute
*attr
)
22272 switch (attr
->form
)
22274 case DW_FORM_sdata
:
22275 case DW_FORM_udata
:
22276 case DW_FORM_data1
:
22277 case DW_FORM_data2
:
22278 case DW_FORM_data4
:
22279 case DW_FORM_data8
:
22287 /* DW_ADDR is always stored already as sect_offset; despite for the forms
22288 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
22291 attr_form_is_ref (const struct attribute
*attr
)
22293 switch (attr
->form
)
22295 case DW_FORM_ref_addr
:
22300 case DW_FORM_ref_udata
:
22301 case DW_FORM_GNU_ref_alt
:
22308 /* Return the .debug_loc section to use for CU.
22309 For DWO files use .debug_loc.dwo. */
22311 static struct dwarf2_section_info
*
22312 cu_debug_loc_section (struct dwarf2_cu
*cu
)
22316 struct dwo_sections
*sections
= &cu
->dwo_unit
->dwo_file
->sections
;
22318 return cu
->header
.version
>= 5 ? §ions
->loclists
: §ions
->loc
;
22320 return (cu
->header
.version
>= 5 ? &dwarf2_per_objfile
->loclists
22321 : &dwarf2_per_objfile
->loc
);
22324 /* A helper function that fills in a dwarf2_loclist_baton. */
22327 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
22328 struct dwarf2_loclist_baton
*baton
,
22329 const struct attribute
*attr
)
22331 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
22333 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
22335 baton
->per_cu
= cu
->per_cu
;
22336 gdb_assert (baton
->per_cu
);
22337 /* We don't know how long the location list is, but make sure we
22338 don't run off the edge of the section. */
22339 baton
->size
= section
->size
- DW_UNSND (attr
);
22340 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
22341 baton
->base_address
= cu
->base_address
;
22342 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
22346 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
22347 struct dwarf2_cu
*cu
, int is_block
)
22349 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22350 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
22352 if (attr_form_is_section_offset (attr
)
22353 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
22354 the section. If so, fall through to the complaint in the
22356 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
22358 struct dwarf2_loclist_baton
*baton
;
22360 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
22362 fill_in_loclist_baton (cu
, baton
, attr
);
22364 if (cu
->base_known
== 0)
22365 complaint (&symfile_complaints
,
22366 _("Location list used without "
22367 "specifying the CU base address."));
22369 SYMBOL_ACLASS_INDEX (sym
) = (is_block
22370 ? dwarf2_loclist_block_index
22371 : dwarf2_loclist_index
);
22372 SYMBOL_LOCATION_BATON (sym
) = baton
;
22376 struct dwarf2_locexpr_baton
*baton
;
22378 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
22379 baton
->per_cu
= cu
->per_cu
;
22380 gdb_assert (baton
->per_cu
);
22382 if (attr_form_is_block (attr
))
22384 /* Note that we're just copying the block's data pointer
22385 here, not the actual data. We're still pointing into the
22386 info_buffer for SYM's objfile; right now we never release
22387 that buffer, but when we do clean up properly this may
22389 baton
->size
= DW_BLOCK (attr
)->size
;
22390 baton
->data
= DW_BLOCK (attr
)->data
;
22394 dwarf2_invalid_attrib_class_complaint ("location description",
22395 SYMBOL_NATURAL_NAME (sym
));
22399 SYMBOL_ACLASS_INDEX (sym
) = (is_block
22400 ? dwarf2_locexpr_block_index
22401 : dwarf2_locexpr_index
);
22402 SYMBOL_LOCATION_BATON (sym
) = baton
;
22406 /* Return the OBJFILE associated with the compilation unit CU. If CU
22407 came from a separate debuginfo file, then the master objfile is
22411 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
22413 struct objfile
*objfile
= per_cu
->objfile
;
22415 /* Return the master objfile, so that we can report and look up the
22416 correct file containing this variable. */
22417 if (objfile
->separate_debug_objfile_backlink
)
22418 objfile
= objfile
->separate_debug_objfile_backlink
;
22423 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
22424 (CU_HEADERP is unused in such case) or prepare a temporary copy at
22425 CU_HEADERP first. */
22427 static const struct comp_unit_head
*
22428 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
22429 struct dwarf2_per_cu_data
*per_cu
)
22431 const gdb_byte
*info_ptr
;
22434 return &per_cu
->cu
->header
;
22436 info_ptr
= per_cu
->section
->buffer
+ per_cu
->offset
.sect_off
;
22438 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
22439 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->section
,
22440 rcuh_kind::COMPILE
);
22445 /* Return the address size given in the compilation unit header for CU. */
22448 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
22450 struct comp_unit_head cu_header_local
;
22451 const struct comp_unit_head
*cu_headerp
;
22453 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
22455 return cu_headerp
->addr_size
;
22458 /* Return the offset size given in the compilation unit header for CU. */
22461 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
22463 struct comp_unit_head cu_header_local
;
22464 const struct comp_unit_head
*cu_headerp
;
22466 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
22468 return cu_headerp
->offset_size
;
22471 /* See its dwarf2loc.h declaration. */
22474 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
22476 struct comp_unit_head cu_header_local
;
22477 const struct comp_unit_head
*cu_headerp
;
22479 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
22481 if (cu_headerp
->version
== 2)
22482 return cu_headerp
->addr_size
;
22484 return cu_headerp
->offset_size
;
22487 /* Return the text offset of the CU. The returned offset comes from
22488 this CU's objfile. If this objfile came from a separate debuginfo
22489 file, then the offset may be different from the corresponding
22490 offset in the parent objfile. */
22493 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
22495 struct objfile
*objfile
= per_cu
->objfile
;
22497 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
22500 /* Return DWARF version number of PER_CU. */
22503 dwarf2_version (struct dwarf2_per_cu_data
*per_cu
)
22505 return per_cu
->dwarf_version
;
22508 /* Locate the .debug_info compilation unit from CU's objfile which contains
22509 the DIE at OFFSET. Raises an error on failure. */
22511 static struct dwarf2_per_cu_data
*
22512 dwarf2_find_containing_comp_unit (sect_offset offset
,
22513 unsigned int offset_in_dwz
,
22514 struct objfile
*objfile
)
22516 struct dwarf2_per_cu_data
*this_cu
;
22518 const sect_offset
*cu_off
;
22521 high
= dwarf2_per_objfile
->n_comp_units
- 1;
22524 struct dwarf2_per_cu_data
*mid_cu
;
22525 int mid
= low
+ (high
- low
) / 2;
22527 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
22528 cu_off
= &mid_cu
->offset
;
22529 if (mid_cu
->is_dwz
> offset_in_dwz
22530 || (mid_cu
->is_dwz
== offset_in_dwz
22531 && cu_off
->sect_off
>= offset
.sect_off
))
22536 gdb_assert (low
== high
);
22537 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
22538 cu_off
= &this_cu
->offset
;
22539 if (this_cu
->is_dwz
!= offset_in_dwz
|| cu_off
->sect_off
> offset
.sect_off
)
22541 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
22542 error (_("Dwarf Error: could not find partial DIE containing "
22543 "offset 0x%lx [in module %s]"),
22544 (long) offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
22546 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
.sect_off
22547 <= offset
.sect_off
);
22548 return dwarf2_per_objfile
->all_comp_units
[low
-1];
22552 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
22553 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
22554 && offset
.sect_off
>= this_cu
->offset
.sect_off
+ this_cu
->length
)
22555 error (_("invalid dwarf2 offset %u"), offset
.sect_off
);
22556 gdb_assert (offset
.sect_off
< this_cu
->offset
.sect_off
+ this_cu
->length
);
22561 /* Initialize dwarf2_cu CU, owned by PER_CU. */
22564 init_one_comp_unit (struct dwarf2_cu
*cu
, struct dwarf2_per_cu_data
*per_cu
)
22566 memset (cu
, 0, sizeof (*cu
));
22568 cu
->per_cu
= per_cu
;
22569 cu
->objfile
= per_cu
->objfile
;
22570 obstack_init (&cu
->comp_unit_obstack
);
22573 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
22576 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
22577 enum language pretend_language
)
22579 struct attribute
*attr
;
22581 /* Set the language we're debugging. */
22582 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
22584 set_cu_language (DW_UNSND (attr
), cu
);
22587 cu
->language
= pretend_language
;
22588 cu
->language_defn
= language_def (cu
->language
);
22591 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
22594 /* Release one cached compilation unit, CU. We unlink it from the tree
22595 of compilation units, but we don't remove it from the read_in_chain;
22596 the caller is responsible for that.
22597 NOTE: DATA is a void * because this function is also used as a
22598 cleanup routine. */
22601 free_heap_comp_unit (void *data
)
22603 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) data
;
22605 gdb_assert (cu
->per_cu
!= NULL
);
22606 cu
->per_cu
->cu
= NULL
;
22609 obstack_free (&cu
->comp_unit_obstack
, NULL
);
22614 /* This cleanup function is passed the address of a dwarf2_cu on the stack
22615 when we're finished with it. We can't free the pointer itself, but be
22616 sure to unlink it from the cache. Also release any associated storage. */
22619 free_stack_comp_unit (void *data
)
22621 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) data
;
22623 gdb_assert (cu
->per_cu
!= NULL
);
22624 cu
->per_cu
->cu
= NULL
;
22627 obstack_free (&cu
->comp_unit_obstack
, NULL
);
22628 cu
->partial_dies
= NULL
;
22631 /* Free all cached compilation units. */
22634 free_cached_comp_units (void *data
)
22636 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22638 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22639 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22640 while (per_cu
!= NULL
)
22642 struct dwarf2_per_cu_data
*next_cu
;
22644 next_cu
= per_cu
->cu
->read_in_chain
;
22646 free_heap_comp_unit (per_cu
->cu
);
22647 *last_chain
= next_cu
;
22653 /* Increase the age counter on each cached compilation unit, and free
22654 any that are too old. */
22657 age_cached_comp_units (void)
22659 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22661 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
22662 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22663 while (per_cu
!= NULL
)
22665 per_cu
->cu
->last_used
++;
22666 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
22667 dwarf2_mark (per_cu
->cu
);
22668 per_cu
= per_cu
->cu
->read_in_chain
;
22671 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22672 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22673 while (per_cu
!= NULL
)
22675 struct dwarf2_per_cu_data
*next_cu
;
22677 next_cu
= per_cu
->cu
->read_in_chain
;
22679 if (!per_cu
->cu
->mark
)
22681 free_heap_comp_unit (per_cu
->cu
);
22682 *last_chain
= next_cu
;
22685 last_chain
= &per_cu
->cu
->read_in_chain
;
22691 /* Remove a single compilation unit from the cache. */
22694 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
22696 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22698 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22699 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22700 while (per_cu
!= NULL
)
22702 struct dwarf2_per_cu_data
*next_cu
;
22704 next_cu
= per_cu
->cu
->read_in_chain
;
22706 if (per_cu
== target_per_cu
)
22708 free_heap_comp_unit (per_cu
->cu
);
22710 *last_chain
= next_cu
;
22714 last_chain
= &per_cu
->cu
->read_in_chain
;
22720 /* Release all extra memory associated with OBJFILE. */
22723 dwarf2_free_objfile (struct objfile
*objfile
)
22726 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
22727 dwarf2_objfile_data_key
);
22729 if (dwarf2_per_objfile
== NULL
)
22732 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
22733 free_cached_comp_units (NULL
);
22735 if (dwarf2_per_objfile
->quick_file_names_table
)
22736 htab_delete (dwarf2_per_objfile
->quick_file_names_table
);
22738 if (dwarf2_per_objfile
->line_header_hash
)
22739 htab_delete (dwarf2_per_objfile
->line_header_hash
);
22741 /* Everything else should be on the objfile obstack. */
22744 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
22745 We store these in a hash table separate from the DIEs, and preserve them
22746 when the DIEs are flushed out of cache.
22748 The CU "per_cu" pointer is needed because offset alone is not enough to
22749 uniquely identify the type. A file may have multiple .debug_types sections,
22750 or the type may come from a DWO file. Furthermore, while it's more logical
22751 to use per_cu->section+offset, with Fission the section with the data is in
22752 the DWO file but we don't know that section at the point we need it.
22753 We have to use something in dwarf2_per_cu_data (or the pointer to it)
22754 because we can enter the lookup routine, get_die_type_at_offset, from
22755 outside this file, and thus won't necessarily have PER_CU->cu.
22756 Fortunately, PER_CU is stable for the life of the objfile. */
22758 struct dwarf2_per_cu_offset_and_type
22760 const struct dwarf2_per_cu_data
*per_cu
;
22761 sect_offset offset
;
22765 /* Hash function for a dwarf2_per_cu_offset_and_type. */
22768 per_cu_offset_and_type_hash (const void *item
)
22770 const struct dwarf2_per_cu_offset_and_type
*ofs
22771 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
22773 return (uintptr_t) ofs
->per_cu
+ ofs
->offset
.sect_off
;
22776 /* Equality function for a dwarf2_per_cu_offset_and_type. */
22779 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
22781 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
22782 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
22783 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
22784 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
22786 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
22787 && ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
);
22790 /* Set the type associated with DIE to TYPE. Save it in CU's hash
22791 table if necessary. For convenience, return TYPE.
22793 The DIEs reading must have careful ordering to:
22794 * Not cause infite loops trying to read in DIEs as a prerequisite for
22795 reading current DIE.
22796 * Not trying to dereference contents of still incompletely read in types
22797 while reading in other DIEs.
22798 * Enable referencing still incompletely read in types just by a pointer to
22799 the type without accessing its fields.
22801 Therefore caller should follow these rules:
22802 * Try to fetch any prerequisite types we may need to build this DIE type
22803 before building the type and calling set_die_type.
22804 * After building type call set_die_type for current DIE as soon as
22805 possible before fetching more types to complete the current type.
22806 * Make the type as complete as possible before fetching more types. */
22808 static struct type
*
22809 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
22811 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
22812 struct objfile
*objfile
= cu
->objfile
;
22813 struct attribute
*attr
;
22814 struct dynamic_prop prop
;
22816 /* For Ada types, make sure that the gnat-specific data is always
22817 initialized (if not already set). There are a few types where
22818 we should not be doing so, because the type-specific area is
22819 already used to hold some other piece of info (eg: TYPE_CODE_FLT
22820 where the type-specific area is used to store the floatformat).
22821 But this is not a problem, because the gnat-specific information
22822 is actually not needed for these types. */
22823 if (need_gnat_info (cu
)
22824 && TYPE_CODE (type
) != TYPE_CODE_FUNC
22825 && TYPE_CODE (type
) != TYPE_CODE_FLT
22826 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
22827 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
22828 && TYPE_CODE (type
) != TYPE_CODE_METHOD
22829 && !HAVE_GNAT_AUX_INFO (type
))
22830 INIT_GNAT_SPECIFIC (type
);
22832 /* Read DW_AT_allocated and set in type. */
22833 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
22834 if (attr_form_is_block (attr
))
22836 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
22837 add_dyn_prop (DYN_PROP_ALLOCATED
, prop
, type
, objfile
);
22839 else if (attr
!= NULL
)
22841 complaint (&symfile_complaints
,
22842 _("DW_AT_allocated has the wrong form (%s) at DIE 0x%x"),
22843 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
22844 die
->offset
.sect_off
);
22847 /* Read DW_AT_associated and set in type. */
22848 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
22849 if (attr_form_is_block (attr
))
22851 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
22852 add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
, type
, objfile
);
22854 else if (attr
!= NULL
)
22856 complaint (&symfile_complaints
,
22857 _("DW_AT_associated has the wrong form (%s) at DIE 0x%x"),
22858 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
22859 die
->offset
.sect_off
);
22862 /* Read DW_AT_data_location and set in type. */
22863 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
22864 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
22865 add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
, type
, objfile
);
22867 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
22869 dwarf2_per_objfile
->die_type_hash
=
22870 htab_create_alloc_ex (127,
22871 per_cu_offset_and_type_hash
,
22872 per_cu_offset_and_type_eq
,
22874 &objfile
->objfile_obstack
,
22875 hashtab_obstack_allocate
,
22876 dummy_obstack_deallocate
);
22879 ofs
.per_cu
= cu
->per_cu
;
22880 ofs
.offset
= die
->offset
;
22882 slot
= (struct dwarf2_per_cu_offset_and_type
**)
22883 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
22885 complaint (&symfile_complaints
,
22886 _("A problem internal to GDB: DIE 0x%x has type already set"),
22887 die
->offset
.sect_off
);
22888 *slot
= XOBNEW (&objfile
->objfile_obstack
,
22889 struct dwarf2_per_cu_offset_and_type
);
22894 /* Look up the type for the die at OFFSET in PER_CU in die_type_hash,
22895 or return NULL if the die does not have a saved type. */
22897 static struct type
*
22898 get_die_type_at_offset (sect_offset offset
,
22899 struct dwarf2_per_cu_data
*per_cu
)
22901 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
22903 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
22906 ofs
.per_cu
= per_cu
;
22907 ofs
.offset
= offset
;
22908 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
22909 htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
));
22916 /* Look up the type for DIE in CU in die_type_hash,
22917 or return NULL if DIE does not have a saved type. */
22919 static struct type
*
22920 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22922 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
22925 /* Add a dependence relationship from CU to REF_PER_CU. */
22928 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
22929 struct dwarf2_per_cu_data
*ref_per_cu
)
22933 if (cu
->dependencies
== NULL
)
22935 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
22936 NULL
, &cu
->comp_unit_obstack
,
22937 hashtab_obstack_allocate
,
22938 dummy_obstack_deallocate
);
22940 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
22942 *slot
= ref_per_cu
;
22945 /* Subroutine of dwarf2_mark to pass to htab_traverse.
22946 Set the mark field in every compilation unit in the
22947 cache that we must keep because we are keeping CU. */
22950 dwarf2_mark_helper (void **slot
, void *data
)
22952 struct dwarf2_per_cu_data
*per_cu
;
22954 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
22956 /* cu->dependencies references may not yet have been ever read if QUIT aborts
22957 reading of the chain. As such dependencies remain valid it is not much
22958 useful to track and undo them during QUIT cleanups. */
22959 if (per_cu
->cu
== NULL
)
22962 if (per_cu
->cu
->mark
)
22964 per_cu
->cu
->mark
= 1;
22966 if (per_cu
->cu
->dependencies
!= NULL
)
22967 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
22972 /* Set the mark field in CU and in every other compilation unit in the
22973 cache that we must keep because we are keeping CU. */
22976 dwarf2_mark (struct dwarf2_cu
*cu
)
22981 if (cu
->dependencies
!= NULL
)
22982 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
22986 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
22990 per_cu
->cu
->mark
= 0;
22991 per_cu
= per_cu
->cu
->read_in_chain
;
22995 /* Trivial hash function for partial_die_info: the hash value of a DIE
22996 is its offset in .debug_info for this objfile. */
22999 partial_die_hash (const void *item
)
23001 const struct partial_die_info
*part_die
23002 = (const struct partial_die_info
*) item
;
23004 return part_die
->offset
.sect_off
;
23007 /* Trivial comparison function for partial_die_info structures: two DIEs
23008 are equal if they have the same offset. */
23011 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
23013 const struct partial_die_info
*part_die_lhs
23014 = (const struct partial_die_info
*) item_lhs
;
23015 const struct partial_die_info
*part_die_rhs
23016 = (const struct partial_die_info
*) item_rhs
;
23018 return part_die_lhs
->offset
.sect_off
== part_die_rhs
->offset
.sect_off
;
23021 static struct cmd_list_element
*set_dwarf_cmdlist
;
23022 static struct cmd_list_element
*show_dwarf_cmdlist
;
23025 set_dwarf_cmd (char *args
, int from_tty
)
23027 help_list (set_dwarf_cmdlist
, "maintenance set dwarf ", all_commands
,
23032 show_dwarf_cmd (char *args
, int from_tty
)
23034 cmd_show_list (show_dwarf_cmdlist
, from_tty
, "");
23037 /* Free data associated with OBJFILE, if necessary. */
23040 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
23042 struct dwarf2_per_objfile
*data
= (struct dwarf2_per_objfile
*) d
;
23045 /* Make sure we don't accidentally use dwarf2_per_objfile while
23047 dwarf2_per_objfile
= NULL
;
23049 for (ix
= 0; ix
< data
->n_comp_units
; ++ix
)
23050 VEC_free (dwarf2_per_cu_ptr
, data
->all_comp_units
[ix
]->imported_symtabs
);
23052 for (ix
= 0; ix
< data
->n_type_units
; ++ix
)
23053 VEC_free (dwarf2_per_cu_ptr
,
23054 data
->all_type_units
[ix
]->per_cu
.imported_symtabs
);
23055 xfree (data
->all_type_units
);
23057 VEC_free (dwarf2_section_info_def
, data
->types
);
23059 if (data
->dwo_files
)
23060 free_dwo_files (data
->dwo_files
, objfile
);
23061 if (data
->dwp_file
)
23062 gdb_bfd_unref (data
->dwp_file
->dbfd
);
23064 if (data
->dwz_file
&& data
->dwz_file
->dwz_bfd
)
23065 gdb_bfd_unref (data
->dwz_file
->dwz_bfd
);
23069 /* The "save gdb-index" command. */
23071 /* The contents of the hash table we create when building the string
23073 struct strtab_entry
23075 offset_type offset
;
23079 /* Hash function for a strtab_entry.
23081 Function is used only during write_hash_table so no index format backward
23082 compatibility is needed. */
23085 hash_strtab_entry (const void *e
)
23087 const struct strtab_entry
*entry
= (const struct strtab_entry
*) e
;
23088 return mapped_index_string_hash (INT_MAX
, entry
->str
);
23091 /* Equality function for a strtab_entry. */
23094 eq_strtab_entry (const void *a
, const void *b
)
23096 const struct strtab_entry
*ea
= (const struct strtab_entry
*) a
;
23097 const struct strtab_entry
*eb
= (const struct strtab_entry
*) b
;
23098 return !strcmp (ea
->str
, eb
->str
);
23101 /* Create a strtab_entry hash table. */
23104 create_strtab (void)
23106 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
23107 xfree
, xcalloc
, xfree
);
23110 /* Add a string to the constant pool. Return the string's offset in
23114 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
23117 struct strtab_entry entry
;
23118 struct strtab_entry
*result
;
23121 slot
= htab_find_slot (table
, &entry
, INSERT
);
23123 result
= (struct strtab_entry
*) *slot
;
23126 result
= XNEW (struct strtab_entry
);
23127 result
->offset
= obstack_object_size (cpool
);
23129 obstack_grow_str0 (cpool
, str
);
23132 return result
->offset
;
23135 /* An entry in the symbol table. */
23136 struct symtab_index_entry
23138 /* The name of the symbol. */
23140 /* The offset of the name in the constant pool. */
23141 offset_type index_offset
;
23142 /* A sorted vector of the indices of all the CUs that hold an object
23144 VEC (offset_type
) *cu_indices
;
23147 /* The symbol table. This is a power-of-2-sized hash table. */
23148 struct mapped_symtab
23150 offset_type n_elements
;
23152 struct symtab_index_entry
**data
;
23155 /* Hash function for a symtab_index_entry. */
23158 hash_symtab_entry (const void *e
)
23160 const struct symtab_index_entry
*entry
23161 = (const struct symtab_index_entry
*) e
;
23162 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
23163 sizeof (offset_type
) * VEC_length (offset_type
,
23164 entry
->cu_indices
),
23168 /* Equality function for a symtab_index_entry. */
23171 eq_symtab_entry (const void *a
, const void *b
)
23173 const struct symtab_index_entry
*ea
= (const struct symtab_index_entry
*) a
;
23174 const struct symtab_index_entry
*eb
= (const struct symtab_index_entry
*) b
;
23175 int len
= VEC_length (offset_type
, ea
->cu_indices
);
23176 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
23178 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
23179 VEC_address (offset_type
, eb
->cu_indices
),
23180 sizeof (offset_type
) * len
);
23183 /* Destroy a symtab_index_entry. */
23186 delete_symtab_entry (void *p
)
23188 struct symtab_index_entry
*entry
= (struct symtab_index_entry
*) p
;
23189 VEC_free (offset_type
, entry
->cu_indices
);
23193 /* Create a hash table holding symtab_index_entry objects. */
23196 create_symbol_hash_table (void)
23198 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
23199 delete_symtab_entry
, xcalloc
, xfree
);
23202 /* Create a new mapped symtab object. */
23204 static struct mapped_symtab
*
23205 create_mapped_symtab (void)
23207 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
23208 symtab
->n_elements
= 0;
23209 symtab
->size
= 1024;
23210 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
23214 /* Destroy a mapped_symtab. */
23217 cleanup_mapped_symtab (void *p
)
23219 struct mapped_symtab
*symtab
= (struct mapped_symtab
*) p
;
23220 /* The contents of the array are freed when the other hash table is
23222 xfree (symtab
->data
);
23226 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
23229 Function is used only during write_hash_table so no index format backward
23230 compatibility is needed. */
23232 static struct symtab_index_entry
**
23233 find_slot (struct mapped_symtab
*symtab
, const char *name
)
23235 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
23237 index
= hash
& (symtab
->size
- 1);
23238 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
23242 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
23243 return &symtab
->data
[index
];
23244 index
= (index
+ step
) & (symtab
->size
- 1);
23248 /* Expand SYMTAB's hash table. */
23251 hash_expand (struct mapped_symtab
*symtab
)
23253 offset_type old_size
= symtab
->size
;
23255 struct symtab_index_entry
**old_entries
= symtab
->data
;
23258 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
23260 for (i
= 0; i
< old_size
; ++i
)
23262 if (old_entries
[i
])
23264 struct symtab_index_entry
**slot
= find_slot (symtab
,
23265 old_entries
[i
]->name
);
23266 *slot
= old_entries
[i
];
23270 xfree (old_entries
);
23273 /* Add an entry to SYMTAB. NAME is the name of the symbol.
23274 CU_INDEX is the index of the CU in which the symbol appears.
23275 IS_STATIC is one if the symbol is static, otherwise zero (global). */
23278 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
23279 int is_static
, gdb_index_symbol_kind kind
,
23280 offset_type cu_index
)
23282 struct symtab_index_entry
**slot
;
23283 offset_type cu_index_and_attrs
;
23285 ++symtab
->n_elements
;
23286 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
23287 hash_expand (symtab
);
23289 slot
= find_slot (symtab
, name
);
23292 *slot
= XNEW (struct symtab_index_entry
);
23293 (*slot
)->name
= name
;
23294 /* index_offset is set later. */
23295 (*slot
)->cu_indices
= NULL
;
23298 cu_index_and_attrs
= 0;
23299 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs
, cu_index
);
23300 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs
, is_static
);
23301 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs
, kind
);
23303 /* We don't want to record an index value twice as we want to avoid the
23305 We process all global symbols and then all static symbols
23306 (which would allow us to avoid the duplication by only having to check
23307 the last entry pushed), but a symbol could have multiple kinds in one CU.
23308 To keep things simple we don't worry about the duplication here and
23309 sort and uniqufy the list after we've processed all symbols. */
23310 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index_and_attrs
);
23313 /* qsort helper routine for uniquify_cu_indices. */
23316 offset_type_compare (const void *ap
, const void *bp
)
23318 offset_type a
= *(offset_type
*) ap
;
23319 offset_type b
= *(offset_type
*) bp
;
23321 return (a
> b
) - (b
> a
);
23324 /* Sort and remove duplicates of all symbols' cu_indices lists. */
23327 uniquify_cu_indices (struct mapped_symtab
*symtab
)
23331 for (i
= 0; i
< symtab
->size
; ++i
)
23333 struct symtab_index_entry
*entry
= symtab
->data
[i
];
23336 && entry
->cu_indices
!= NULL
)
23338 unsigned int next_to_insert
, next_to_check
;
23339 offset_type last_value
;
23341 qsort (VEC_address (offset_type
, entry
->cu_indices
),
23342 VEC_length (offset_type
, entry
->cu_indices
),
23343 sizeof (offset_type
), offset_type_compare
);
23345 last_value
= VEC_index (offset_type
, entry
->cu_indices
, 0);
23346 next_to_insert
= 1;
23347 for (next_to_check
= 1;
23348 next_to_check
< VEC_length (offset_type
, entry
->cu_indices
);
23351 if (VEC_index (offset_type
, entry
->cu_indices
, next_to_check
)
23354 last_value
= VEC_index (offset_type
, entry
->cu_indices
,
23356 VEC_replace (offset_type
, entry
->cu_indices
, next_to_insert
,
23361 VEC_truncate (offset_type
, entry
->cu_indices
, next_to_insert
);
23366 /* Add a vector of indices to the constant pool. */
23369 add_indices_to_cpool (htab_t symbol_hash_table
, struct obstack
*cpool
,
23370 struct symtab_index_entry
*entry
)
23374 slot
= htab_find_slot (symbol_hash_table
, entry
, INSERT
);
23377 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
23378 offset_type val
= MAYBE_SWAP (len
);
23383 entry
->index_offset
= obstack_object_size (cpool
);
23385 obstack_grow (cpool
, &val
, sizeof (val
));
23387 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
23390 val
= MAYBE_SWAP (iter
);
23391 obstack_grow (cpool
, &val
, sizeof (val
));
23396 struct symtab_index_entry
*old_entry
23397 = (struct symtab_index_entry
*) *slot
;
23398 entry
->index_offset
= old_entry
->index_offset
;
23401 return entry
->index_offset
;
23404 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
23405 constant pool entries going into the obstack CPOOL. */
23408 write_hash_table (struct mapped_symtab
*symtab
,
23409 struct obstack
*output
, struct obstack
*cpool
)
23412 htab_t symbol_hash_table
;
23415 symbol_hash_table
= create_symbol_hash_table ();
23416 str_table
= create_strtab ();
23418 /* We add all the index vectors to the constant pool first, to
23419 ensure alignment is ok. */
23420 for (i
= 0; i
< symtab
->size
; ++i
)
23422 if (symtab
->data
[i
])
23423 add_indices_to_cpool (symbol_hash_table
, cpool
, symtab
->data
[i
]);
23426 /* Now write out the hash table. */
23427 for (i
= 0; i
< symtab
->size
; ++i
)
23429 offset_type str_off
, vec_off
;
23431 if (symtab
->data
[i
])
23433 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
23434 vec_off
= symtab
->data
[i
]->index_offset
;
23438 /* While 0 is a valid constant pool index, it is not valid
23439 to have 0 for both offsets. */
23444 str_off
= MAYBE_SWAP (str_off
);
23445 vec_off
= MAYBE_SWAP (vec_off
);
23447 obstack_grow (output
, &str_off
, sizeof (str_off
));
23448 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
23451 htab_delete (str_table
);
23452 htab_delete (symbol_hash_table
);
23455 /* Struct to map psymtab to CU index in the index file. */
23456 struct psymtab_cu_index_map
23458 struct partial_symtab
*psymtab
;
23459 unsigned int cu_index
;
23463 hash_psymtab_cu_index (const void *item
)
23465 const struct psymtab_cu_index_map
*map
23466 = (const struct psymtab_cu_index_map
*) item
;
23468 return htab_hash_pointer (map
->psymtab
);
23472 eq_psymtab_cu_index (const void *item_lhs
, const void *item_rhs
)
23474 const struct psymtab_cu_index_map
*lhs
23475 = (const struct psymtab_cu_index_map
*) item_lhs
;
23476 const struct psymtab_cu_index_map
*rhs
23477 = (const struct psymtab_cu_index_map
*) item_rhs
;
23479 return lhs
->psymtab
== rhs
->psymtab
;
23482 /* Helper struct for building the address table. */
23483 struct addrmap_index_data
23485 struct objfile
*objfile
;
23486 struct obstack
*addr_obstack
;
23487 htab_t cu_index_htab
;
23489 /* Non-zero if the previous_* fields are valid.
23490 We can't write an entry until we see the next entry (since it is only then
23491 that we know the end of the entry). */
23492 int previous_valid
;
23493 /* Index of the CU in the table of all CUs in the index file. */
23494 unsigned int previous_cu_index
;
23495 /* Start address of the CU. */
23496 CORE_ADDR previous_cu_start
;
23499 /* Write an address entry to OBSTACK. */
23502 add_address_entry (struct objfile
*objfile
, struct obstack
*obstack
,
23503 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
23505 offset_type cu_index_to_write
;
23507 CORE_ADDR baseaddr
;
23509 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
23511 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
23512 obstack_grow (obstack
, addr
, 8);
23513 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
23514 obstack_grow (obstack
, addr
, 8);
23515 cu_index_to_write
= MAYBE_SWAP (cu_index
);
23516 obstack_grow (obstack
, &cu_index_to_write
, sizeof (offset_type
));
23519 /* Worker function for traversing an addrmap to build the address table. */
23522 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
23524 struct addrmap_index_data
*data
= (struct addrmap_index_data
*) datap
;
23525 struct partial_symtab
*pst
= (struct partial_symtab
*) obj
;
23527 if (data
->previous_valid
)
23528 add_address_entry (data
->objfile
, data
->addr_obstack
,
23529 data
->previous_cu_start
, start_addr
,
23530 data
->previous_cu_index
);
23532 data
->previous_cu_start
= start_addr
;
23535 struct psymtab_cu_index_map find_map
, *map
;
23536 find_map
.psymtab
= pst
;
23537 map
= ((struct psymtab_cu_index_map
*)
23538 htab_find (data
->cu_index_htab
, &find_map
));
23539 gdb_assert (map
!= NULL
);
23540 data
->previous_cu_index
= map
->cu_index
;
23541 data
->previous_valid
= 1;
23544 data
->previous_valid
= 0;
23549 /* Write OBJFILE's address map to OBSTACK.
23550 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
23551 in the index file. */
23554 write_address_map (struct objfile
*objfile
, struct obstack
*obstack
,
23555 htab_t cu_index_htab
)
23557 struct addrmap_index_data addrmap_index_data
;
23559 /* When writing the address table, we have to cope with the fact that
23560 the addrmap iterator only provides the start of a region; we have to
23561 wait until the next invocation to get the start of the next region. */
23563 addrmap_index_data
.objfile
= objfile
;
23564 addrmap_index_data
.addr_obstack
= obstack
;
23565 addrmap_index_data
.cu_index_htab
= cu_index_htab
;
23566 addrmap_index_data
.previous_valid
= 0;
23568 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
23569 &addrmap_index_data
);
23571 /* It's highly unlikely the last entry (end address = 0xff...ff)
23572 is valid, but we should still handle it.
23573 The end address is recorded as the start of the next region, but that
23574 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
23576 if (addrmap_index_data
.previous_valid
)
23577 add_address_entry (objfile
, obstack
,
23578 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
23579 addrmap_index_data
.previous_cu_index
);
23582 /* Return the symbol kind of PSYM. */
23584 static gdb_index_symbol_kind
23585 symbol_kind (struct partial_symbol
*psym
)
23587 domain_enum domain
= PSYMBOL_DOMAIN (psym
);
23588 enum address_class aclass
= PSYMBOL_CLASS (psym
);
23596 return GDB_INDEX_SYMBOL_KIND_FUNCTION
;
23598 return GDB_INDEX_SYMBOL_KIND_TYPE
;
23600 case LOC_CONST_BYTES
:
23601 case LOC_OPTIMIZED_OUT
:
23603 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
23605 /* Note: It's currently impossible to recognize psyms as enum values
23606 short of reading the type info. For now punt. */
23607 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
23609 /* There are other LOC_FOO values that one might want to classify
23610 as variables, but dwarf2read.c doesn't currently use them. */
23611 return GDB_INDEX_SYMBOL_KIND_OTHER
;
23613 case STRUCT_DOMAIN
:
23614 return GDB_INDEX_SYMBOL_KIND_TYPE
;
23616 return GDB_INDEX_SYMBOL_KIND_OTHER
;
23620 /* Add a list of partial symbols to SYMTAB. */
23623 write_psymbols (struct mapped_symtab
*symtab
,
23625 struct partial_symbol
**psymp
,
23627 offset_type cu_index
,
23630 for (; count
-- > 0; ++psymp
)
23632 struct partial_symbol
*psym
= *psymp
;
23635 if (SYMBOL_LANGUAGE (psym
) == language_ada
)
23636 error (_("Ada is not currently supported by the index"));
23638 /* Only add a given psymbol once. */
23639 slot
= htab_find_slot (psyms_seen
, psym
, INSERT
);
23642 gdb_index_symbol_kind kind
= symbol_kind (psym
);
23645 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (psym
),
23646 is_static
, kind
, cu_index
);
23651 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
23652 exception if there is an error. */
23655 write_obstack (FILE *file
, struct obstack
*obstack
)
23657 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
23659 != obstack_object_size (obstack
))
23660 error (_("couldn't data write to file"));
23663 /* A helper struct used when iterating over debug_types. */
23664 struct signatured_type_index_data
23666 struct objfile
*objfile
;
23667 struct mapped_symtab
*symtab
;
23668 struct obstack
*types_list
;
23673 /* A helper function that writes a single signatured_type to an
23677 write_one_signatured_type (void **slot
, void *d
)
23679 struct signatured_type_index_data
*info
23680 = (struct signatured_type_index_data
*) d
;
23681 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
23682 struct partial_symtab
*psymtab
= entry
->per_cu
.v
.psymtab
;
23685 write_psymbols (info
->symtab
,
23687 info
->objfile
->global_psymbols
.list
23688 + psymtab
->globals_offset
,
23689 psymtab
->n_global_syms
, info
->cu_index
,
23691 write_psymbols (info
->symtab
,
23693 info
->objfile
->static_psymbols
.list
23694 + psymtab
->statics_offset
,
23695 psymtab
->n_static_syms
, info
->cu_index
,
23698 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23699 entry
->per_cu
.offset
.sect_off
);
23700 obstack_grow (info
->types_list
, val
, 8);
23701 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23702 entry
->type_offset_in_tu
.cu_off
);
23703 obstack_grow (info
->types_list
, val
, 8);
23704 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
23705 obstack_grow (info
->types_list
, val
, 8);
23712 /* Recurse into all "included" dependencies and write their symbols as
23713 if they appeared in this psymtab. */
23716 recursively_write_psymbols (struct objfile
*objfile
,
23717 struct partial_symtab
*psymtab
,
23718 struct mapped_symtab
*symtab
,
23720 offset_type cu_index
)
23724 for (i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
23725 if (psymtab
->dependencies
[i
]->user
!= NULL
)
23726 recursively_write_psymbols (objfile
, psymtab
->dependencies
[i
],
23727 symtab
, psyms_seen
, cu_index
);
23729 write_psymbols (symtab
,
23731 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
23732 psymtab
->n_global_syms
, cu_index
,
23734 write_psymbols (symtab
,
23736 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
23737 psymtab
->n_static_syms
, cu_index
,
23741 /* Create an index file for OBJFILE in the directory DIR. */
23744 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
23746 struct cleanup
*cleanup
;
23748 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
23749 struct obstack cu_list
, types_cu_list
;
23752 struct mapped_symtab
*symtab
;
23753 offset_type val
, size_of_contents
, total_len
;
23755 struct psymtab_cu_index_map
*psymtab_cu_index_map
;
23757 if (dwarf2_per_objfile
->using_index
)
23758 error (_("Cannot use an index to create the index"));
23760 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
23761 error (_("Cannot make an index when the file has multiple .debug_types sections"));
23763 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
23766 if (stat (objfile_name (objfile
), &st
) < 0)
23767 perror_with_name (objfile_name (objfile
));
23769 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile_name (objfile
)),
23770 INDEX_SUFFIX
, (char *) NULL
);
23771 cleanup
= make_cleanup (xfree
, filename
);
23773 out_file
= gdb_fopen_cloexec (filename
, "wb");
23775 error (_("Can't open `%s' for writing"), filename
);
23777 gdb::unlinker
unlink_file (filename
);
23779 symtab
= create_mapped_symtab ();
23780 make_cleanup (cleanup_mapped_symtab
, symtab
);
23782 obstack_init (&addr_obstack
);
23783 make_cleanup_obstack_free (&addr_obstack
);
23785 obstack_init (&cu_list
);
23786 make_cleanup_obstack_free (&cu_list
);
23788 obstack_init (&types_cu_list
);
23789 make_cleanup_obstack_free (&types_cu_list
);
23791 htab_up
psyms_seen (htab_create_alloc (100, htab_hash_pointer
,
23793 NULL
, xcalloc
, xfree
));
23795 /* While we're scanning CU's create a table that maps a psymtab pointer
23796 (which is what addrmap records) to its index (which is what is recorded
23797 in the index file). This will later be needed to write the address
23799 htab_up
cu_index_htab (htab_create_alloc (100,
23800 hash_psymtab_cu_index
,
23801 eq_psymtab_cu_index
,
23802 NULL
, xcalloc
, xfree
));
23803 psymtab_cu_index_map
= XNEWVEC (struct psymtab_cu_index_map
,
23804 dwarf2_per_objfile
->n_comp_units
);
23805 make_cleanup (xfree
, psymtab_cu_index_map
);
23807 /* The CU list is already sorted, so we don't need to do additional
23808 work here. Also, the debug_types entries do not appear in
23809 all_comp_units, but only in their own hash table. */
23810 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
23812 struct dwarf2_per_cu_data
*per_cu
23813 = dwarf2_per_objfile
->all_comp_units
[i
];
23814 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
23816 struct psymtab_cu_index_map
*map
;
23819 /* CU of a shared file from 'dwz -m' may be unused by this main file.
23820 It may be referenced from a local scope but in such case it does not
23821 need to be present in .gdb_index. */
23822 if (psymtab
== NULL
)
23825 if (psymtab
->user
== NULL
)
23826 recursively_write_psymbols (objfile
, psymtab
, symtab
,
23827 psyms_seen
.get (), i
);
23829 map
= &psymtab_cu_index_map
[i
];
23830 map
->psymtab
= psymtab
;
23832 slot
= htab_find_slot (cu_index_htab
.get (), map
, INSERT
);
23833 gdb_assert (slot
!= NULL
);
23834 gdb_assert (*slot
== NULL
);
23837 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23838 per_cu
->offset
.sect_off
);
23839 obstack_grow (&cu_list
, val
, 8);
23840 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
23841 obstack_grow (&cu_list
, val
, 8);
23844 /* Dump the address map. */
23845 write_address_map (objfile
, &addr_obstack
, cu_index_htab
.get ());
23847 /* Write out the .debug_type entries, if any. */
23848 if (dwarf2_per_objfile
->signatured_types
)
23850 struct signatured_type_index_data sig_data
;
23852 sig_data
.objfile
= objfile
;
23853 sig_data
.symtab
= symtab
;
23854 sig_data
.types_list
= &types_cu_list
;
23855 sig_data
.psyms_seen
= psyms_seen
.get ();
23856 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
23857 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
23858 write_one_signatured_type
, &sig_data
);
23861 /* Now that we've processed all symbols we can shrink their cu_indices
23863 uniquify_cu_indices (symtab
);
23865 obstack_init (&constant_pool
);
23866 make_cleanup_obstack_free (&constant_pool
);
23867 obstack_init (&symtab_obstack
);
23868 make_cleanup_obstack_free (&symtab_obstack
);
23869 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
23871 obstack_init (&contents
);
23872 make_cleanup_obstack_free (&contents
);
23873 size_of_contents
= 6 * sizeof (offset_type
);
23874 total_len
= size_of_contents
;
23876 /* The version number. */
23877 val
= MAYBE_SWAP (8);
23878 obstack_grow (&contents
, &val
, sizeof (val
));
23880 /* The offset of the CU list from the start of the file. */
23881 val
= MAYBE_SWAP (total_len
);
23882 obstack_grow (&contents
, &val
, sizeof (val
));
23883 total_len
+= obstack_object_size (&cu_list
);
23885 /* The offset of the types CU list from the start of the file. */
23886 val
= MAYBE_SWAP (total_len
);
23887 obstack_grow (&contents
, &val
, sizeof (val
));
23888 total_len
+= obstack_object_size (&types_cu_list
);
23890 /* The offset of the address table from the start of the file. */
23891 val
= MAYBE_SWAP (total_len
);
23892 obstack_grow (&contents
, &val
, sizeof (val
));
23893 total_len
+= obstack_object_size (&addr_obstack
);
23895 /* The offset of the symbol table from the start of the file. */
23896 val
= MAYBE_SWAP (total_len
);
23897 obstack_grow (&contents
, &val
, sizeof (val
));
23898 total_len
+= obstack_object_size (&symtab_obstack
);
23900 /* The offset of the constant pool from the start of the file. */
23901 val
= MAYBE_SWAP (total_len
);
23902 obstack_grow (&contents
, &val
, sizeof (val
));
23903 total_len
+= obstack_object_size (&constant_pool
);
23905 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
23907 write_obstack (out_file
, &contents
);
23908 write_obstack (out_file
, &cu_list
);
23909 write_obstack (out_file
, &types_cu_list
);
23910 write_obstack (out_file
, &addr_obstack
);
23911 write_obstack (out_file
, &symtab_obstack
);
23912 write_obstack (out_file
, &constant_pool
);
23916 /* We want to keep the file. */
23917 unlink_file
.keep ();
23919 do_cleanups (cleanup
);
23922 /* Implementation of the `save gdb-index' command.
23924 Note that the file format used by this command is documented in the
23925 GDB manual. Any changes here must be documented there. */
23928 save_gdb_index_command (char *arg
, int from_tty
)
23930 struct objfile
*objfile
;
23933 error (_("usage: save gdb-index DIRECTORY"));
23935 ALL_OBJFILES (objfile
)
23939 /* If the objfile does not correspond to an actual file, skip it. */
23940 if (stat (objfile_name (objfile
), &st
) < 0)
23944 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
23945 dwarf2_objfile_data_key
);
23946 if (dwarf2_per_objfile
)
23951 write_psymtabs_to_index (objfile
, arg
);
23953 CATCH (except
, RETURN_MASK_ERROR
)
23955 exception_fprintf (gdb_stderr
, except
,
23956 _("Error while writing index for `%s': "),
23957 objfile_name (objfile
));
23966 int dwarf_always_disassemble
;
23969 show_dwarf_always_disassemble (struct ui_file
*file
, int from_tty
,
23970 struct cmd_list_element
*c
, const char *value
)
23972 fprintf_filtered (file
,
23973 _("Whether to always disassemble "
23974 "DWARF expressions is %s.\n"),
23979 show_check_physname (struct ui_file
*file
, int from_tty
,
23980 struct cmd_list_element
*c
, const char *value
)
23982 fprintf_filtered (file
,
23983 _("Whether to check \"physname\" is %s.\n"),
23987 void _initialize_dwarf2_read (void);
23990 _initialize_dwarf2_read (void)
23992 struct cmd_list_element
*c
;
23994 dwarf2_objfile_data_key
23995 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
23997 add_prefix_cmd ("dwarf", class_maintenance
, set_dwarf_cmd
, _("\
23998 Set DWARF specific variables.\n\
23999 Configure DWARF variables such as the cache size"),
24000 &set_dwarf_cmdlist
, "maintenance set dwarf ",
24001 0/*allow-unknown*/, &maintenance_set_cmdlist
);
24003 add_prefix_cmd ("dwarf", class_maintenance
, show_dwarf_cmd
, _("\
24004 Show DWARF specific variables\n\
24005 Show DWARF variables such as the cache size"),
24006 &show_dwarf_cmdlist
, "maintenance show dwarf ",
24007 0/*allow-unknown*/, &maintenance_show_cmdlist
);
24009 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
24010 &dwarf_max_cache_age
, _("\
24011 Set the upper bound on the age of cached DWARF compilation units."), _("\
24012 Show the upper bound on the age of cached DWARF compilation units."), _("\
24013 A higher limit means that cached compilation units will be stored\n\
24014 in memory longer, and more total memory will be used. Zero disables\n\
24015 caching, which can slow down startup."),
24017 show_dwarf_max_cache_age
,
24018 &set_dwarf_cmdlist
,
24019 &show_dwarf_cmdlist
);
24021 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
24022 &dwarf_always_disassemble
, _("\
24023 Set whether `info address' always disassembles DWARF expressions."), _("\
24024 Show whether `info address' always disassembles DWARF expressions."), _("\
24025 When enabled, DWARF expressions are always printed in an assembly-like\n\
24026 syntax. When disabled, expressions will be printed in a more\n\
24027 conversational style, when possible."),
24029 show_dwarf_always_disassemble
,
24030 &set_dwarf_cmdlist
,
24031 &show_dwarf_cmdlist
);
24033 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
24034 Set debugging of the DWARF reader."), _("\
24035 Show debugging of the DWARF reader."), _("\
24036 When enabled (non-zero), debugging messages are printed during DWARF\n\
24037 reading and symtab expansion. A value of 1 (one) provides basic\n\
24038 information. A value greater than 1 provides more verbose information."),
24041 &setdebuglist
, &showdebuglist
);
24043 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
24044 Set debugging of the DWARF DIE reader."), _("\
24045 Show debugging of the DWARF DIE reader."), _("\
24046 When enabled (non-zero), DIEs are dumped after they are read in.\n\
24047 The value is the maximum depth to print."),
24050 &setdebuglist
, &showdebuglist
);
24052 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
24053 Set debugging of the dwarf line reader."), _("\
24054 Show debugging of the dwarf line reader."), _("\
24055 When enabled (non-zero), line number entries are dumped as they are read in.\n\
24056 A value of 1 (one) provides basic information.\n\
24057 A value greater than 1 provides more verbose information."),
24060 &setdebuglist
, &showdebuglist
);
24062 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
24063 Set cross-checking of \"physname\" code against demangler."), _("\
24064 Show cross-checking of \"physname\" code against demangler."), _("\
24065 When enabled, GDB's internal \"physname\" code is checked against\n\
24067 NULL
, show_check_physname
,
24068 &setdebuglist
, &showdebuglist
);
24070 add_setshow_boolean_cmd ("use-deprecated-index-sections",
24071 no_class
, &use_deprecated_index_sections
, _("\
24072 Set whether to use deprecated gdb_index sections."), _("\
24073 Show whether to use deprecated gdb_index sections."), _("\
24074 When enabled, deprecated .gdb_index sections are used anyway.\n\
24075 Normally they are ignored either because of a missing feature or\n\
24076 performance issue.\n\
24077 Warning: This option must be enabled before gdb reads the file."),
24080 &setlist
, &showlist
);
24082 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
24084 Save a gdb-index file.\n\
24085 Usage: save gdb-index DIRECTORY"),
24087 set_cmd_completer (c
, filename_completer
);
24089 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
24090 &dwarf2_locexpr_funcs
);
24091 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
24092 &dwarf2_loclist_funcs
);
24094 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
24095 &dwarf2_block_frame_base_locexpr_funcs
);
24096 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
24097 &dwarf2_block_frame_base_loclist_funcs
);