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"
73 #include "common/function-view.h"
74 #include "common/gdb_optional.h"
75 #include "common/underlying.h"
76 #include "common/byte-vector.h"
77 #include "filename-seen-cache.h"
80 #include <sys/types.h>
82 #include <unordered_set>
83 #include <unordered_map>
85 typedef struct symbol
*symbolp
;
88 /* When == 1, print basic high level tracing messages.
89 When > 1, be more verbose.
90 This is in contrast to the low level DIE reading of dwarf_die_debug. */
91 static unsigned int dwarf_read_debug
= 0;
93 /* When non-zero, dump DIEs after they are read in. */
94 static unsigned int dwarf_die_debug
= 0;
96 /* When non-zero, dump line number entries as they are read in. */
97 static unsigned int dwarf_line_debug
= 0;
99 /* When non-zero, cross-check physname against demangler. */
100 static int check_physname
= 0;
102 /* When non-zero, do not reject deprecated .gdb_index sections. */
103 static int use_deprecated_index_sections
= 0;
105 static const struct objfile_data
*dwarf2_objfile_data_key
;
107 /* The "aclass" indices for various kinds of computed DWARF symbols. */
109 static int dwarf2_locexpr_index
;
110 static int dwarf2_loclist_index
;
111 static int dwarf2_locexpr_block_index
;
112 static int dwarf2_loclist_block_index
;
114 /* A descriptor for dwarf sections.
116 S.ASECTION, SIZE are typically initialized when the objfile is first
117 scanned. BUFFER, READIN are filled in later when the section is read.
118 If the section contained compressed data then SIZE is updated to record
119 the uncompressed size of the section.
121 DWP file format V2 introduces a wrinkle that is easiest to handle by
122 creating the concept of virtual sections contained within a real section.
123 In DWP V2 the sections of the input DWO files are concatenated together
124 into one section, but section offsets are kept relative to the original
126 If this is a virtual dwp-v2 section, S.CONTAINING_SECTION is a backlink to
127 the real section this "virtual" section is contained in, and BUFFER,SIZE
128 describe the virtual section. */
130 struct dwarf2_section_info
134 /* If this is a real section, the bfd section. */
136 /* If this is a virtual section, pointer to the containing ("real")
138 struct dwarf2_section_info
*containing_section
;
140 /* Pointer to section data, only valid if readin. */
141 const gdb_byte
*buffer
;
142 /* The size of the section, real or virtual. */
144 /* If this is a virtual section, the offset in the real section.
145 Only valid if is_virtual. */
146 bfd_size_type virtual_offset
;
147 /* True if we have tried to read this section. */
149 /* True if this is a virtual section, False otherwise.
150 This specifies which of s.section and s.containing_section to use. */
154 typedef struct dwarf2_section_info dwarf2_section_info_def
;
155 DEF_VEC_O (dwarf2_section_info_def
);
157 /* All offsets in the index are of this type. It must be
158 architecture-independent. */
159 typedef uint32_t offset_type
;
161 DEF_VEC_I (offset_type
);
163 /* Ensure only legit values are used. */
164 #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \
166 gdb_assert ((unsigned int) (value) <= 1); \
167 GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \
170 /* Ensure only legit values are used. */
171 #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \
173 gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \
174 && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \
175 GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \
178 /* Ensure we don't use more than the alloted nuber of bits for the CU. */
179 #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \
181 gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \
182 GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \
185 /* A description of the mapped index. The file format is described in
186 a comment by the code that writes the index. */
189 /* Index data format version. */
192 /* The total length of the buffer. */
195 /* A pointer to the address table data. */
196 const gdb_byte
*address_table
;
198 /* Size of the address table data in bytes. */
199 offset_type address_table_size
;
201 /* The symbol table, implemented as a hash table. */
202 const offset_type
*symbol_table
;
204 /* Size in slots, each slot is 2 offset_types. */
205 offset_type symbol_table_slots
;
207 /* A pointer to the constant pool. */
208 const char *constant_pool
;
211 typedef struct dwarf2_per_cu_data
*dwarf2_per_cu_ptr
;
212 DEF_VEC_P (dwarf2_per_cu_ptr
);
216 int nr_uniq_abbrev_tables
;
218 int nr_symtab_sharers
;
219 int nr_stmt_less_type_units
;
220 int nr_all_type_units_reallocs
;
223 /* Collection of data recorded per objfile.
224 This hangs off of dwarf2_objfile_data_key. */
226 struct dwarf2_per_objfile
228 /* Construct a dwarf2_per_objfile for OBJFILE. NAMES points to the
229 dwarf2 section names, or is NULL if the standard ELF names are
231 dwarf2_per_objfile (struct objfile
*objfile
,
232 const dwarf2_debug_sections
*names
);
234 ~dwarf2_per_objfile ();
236 DISABLE_COPY_AND_ASSIGN (dwarf2_per_objfile
);
238 /* Free all cached compilation units. */
239 void free_cached_comp_units ();
241 /* This function is mapped across the sections and remembers the
242 offset and size of each of the debugging sections we are
244 void locate_sections (bfd
*abfd
, asection
*sectp
,
245 const dwarf2_debug_sections
&names
);
248 dwarf2_section_info info
{};
249 dwarf2_section_info abbrev
{};
250 dwarf2_section_info line
{};
251 dwarf2_section_info loc
{};
252 dwarf2_section_info loclists
{};
253 dwarf2_section_info macinfo
{};
254 dwarf2_section_info macro
{};
255 dwarf2_section_info str
{};
256 dwarf2_section_info line_str
{};
257 dwarf2_section_info ranges
{};
258 dwarf2_section_info rnglists
{};
259 dwarf2_section_info addr
{};
260 dwarf2_section_info frame
{};
261 dwarf2_section_info eh_frame
{};
262 dwarf2_section_info gdb_index
{};
264 VEC (dwarf2_section_info_def
) *types
= NULL
;
267 struct objfile
*objfile
= NULL
;
269 /* Table of all the compilation units. This is used to locate
270 the target compilation unit of a particular reference. */
271 struct dwarf2_per_cu_data
**all_comp_units
= NULL
;
273 /* The number of compilation units in ALL_COMP_UNITS. */
274 int n_comp_units
= 0;
276 /* The number of .debug_types-related CUs. */
277 int n_type_units
= 0;
279 /* The number of elements allocated in all_type_units.
280 If there are skeleton-less TUs, we add them to all_type_units lazily. */
281 int n_allocated_type_units
= 0;
283 /* The .debug_types-related CUs (TUs).
284 This is stored in malloc space because we may realloc it. */
285 struct signatured_type
**all_type_units
= NULL
;
287 /* Table of struct type_unit_group objects.
288 The hash key is the DW_AT_stmt_list value. */
289 htab_t type_unit_groups
{};
291 /* A table mapping .debug_types signatures to its signatured_type entry.
292 This is NULL if the .debug_types section hasn't been read in yet. */
293 htab_t signatured_types
{};
295 /* Type unit statistics, to see how well the scaling improvements
297 struct tu_stats tu_stats
{};
299 /* A chain of compilation units that are currently read in, so that
300 they can be freed later. */
301 dwarf2_per_cu_data
*read_in_chain
= NULL
;
303 /* A table mapping DW_AT_dwo_name values to struct dwo_file objects.
304 This is NULL if the table hasn't been allocated yet. */
307 /* True if we've checked for whether there is a DWP file. */
308 bool dwp_checked
= false;
310 /* The DWP file if there is one, or NULL. */
311 struct dwp_file
*dwp_file
= NULL
;
313 /* The shared '.dwz' file, if one exists. This is used when the
314 original data was compressed using 'dwz -m'. */
315 struct dwz_file
*dwz_file
= NULL
;
317 /* A flag indicating whether this objfile has a section loaded at a
319 bool has_section_at_zero
= false;
321 /* True if we are using the mapped index,
322 or we are faking it for OBJF_READNOW's sake. */
323 bool using_index
= false;
325 /* The mapped index, or NULL if .gdb_index is missing or not being used. */
326 mapped_index
*index_table
= NULL
;
328 /* When using index_table, this keeps track of all quick_file_names entries.
329 TUs typically share line table entries with a CU, so we maintain a
330 separate table of all line table entries to support the sharing.
331 Note that while there can be way more TUs than CUs, we've already
332 sorted all the TUs into "type unit groups", grouped by their
333 DW_AT_stmt_list value. Therefore the only sharing done here is with a
334 CU and its associated TU group if there is one. */
335 htab_t quick_file_names_table
{};
337 /* Set during partial symbol reading, to prevent queueing of full
339 bool reading_partial_symbols
= false;
341 /* Table mapping type DIEs to their struct type *.
342 This is NULL if not allocated yet.
343 The mapping is done via (CU/TU + DIE offset) -> type. */
344 htab_t die_type_hash
{};
346 /* The CUs we recently read. */
347 VEC (dwarf2_per_cu_ptr
) *just_read_cus
= NULL
;
349 /* Table containing line_header indexed by offset and offset_in_dwz. */
350 htab_t line_header_hash
{};
352 /* Table containing all filenames. This is an optional because the
353 table is lazily constructed on first access. */
354 gdb::optional
<filename_seen_cache
> filenames_cache
;
357 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
359 /* Default names of the debugging sections. */
361 /* Note that if the debugging section has been compressed, it might
362 have a name like .zdebug_info. */
364 static const struct dwarf2_debug_sections dwarf2_elf_names
=
366 { ".debug_info", ".zdebug_info" },
367 { ".debug_abbrev", ".zdebug_abbrev" },
368 { ".debug_line", ".zdebug_line" },
369 { ".debug_loc", ".zdebug_loc" },
370 { ".debug_loclists", ".zdebug_loclists" },
371 { ".debug_macinfo", ".zdebug_macinfo" },
372 { ".debug_macro", ".zdebug_macro" },
373 { ".debug_str", ".zdebug_str" },
374 { ".debug_line_str", ".zdebug_line_str" },
375 { ".debug_ranges", ".zdebug_ranges" },
376 { ".debug_rnglists", ".zdebug_rnglists" },
377 { ".debug_types", ".zdebug_types" },
378 { ".debug_addr", ".zdebug_addr" },
379 { ".debug_frame", ".zdebug_frame" },
380 { ".eh_frame", NULL
},
381 { ".gdb_index", ".zgdb_index" },
385 /* List of DWO/DWP sections. */
387 static const struct dwop_section_names
389 struct dwarf2_section_names abbrev_dwo
;
390 struct dwarf2_section_names info_dwo
;
391 struct dwarf2_section_names line_dwo
;
392 struct dwarf2_section_names loc_dwo
;
393 struct dwarf2_section_names loclists_dwo
;
394 struct dwarf2_section_names macinfo_dwo
;
395 struct dwarf2_section_names macro_dwo
;
396 struct dwarf2_section_names str_dwo
;
397 struct dwarf2_section_names str_offsets_dwo
;
398 struct dwarf2_section_names types_dwo
;
399 struct dwarf2_section_names cu_index
;
400 struct dwarf2_section_names tu_index
;
404 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
405 { ".debug_info.dwo", ".zdebug_info.dwo" },
406 { ".debug_line.dwo", ".zdebug_line.dwo" },
407 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
408 { ".debug_loclists.dwo", ".zdebug_loclists.dwo" },
409 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
410 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
411 { ".debug_str.dwo", ".zdebug_str.dwo" },
412 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
413 { ".debug_types.dwo", ".zdebug_types.dwo" },
414 { ".debug_cu_index", ".zdebug_cu_index" },
415 { ".debug_tu_index", ".zdebug_tu_index" },
418 /* local data types */
420 /* The data in a compilation unit header, after target2host
421 translation, looks like this. */
422 struct comp_unit_head
426 unsigned char addr_size
;
427 unsigned char signed_addr_p
;
428 sect_offset abbrev_sect_off
;
430 /* Size of file offsets; either 4 or 8. */
431 unsigned int offset_size
;
433 /* Size of the length field; either 4 or 12. */
434 unsigned int initial_length_size
;
436 enum dwarf_unit_type unit_type
;
438 /* Offset to the first byte of this compilation unit header in the
439 .debug_info section, for resolving relative reference dies. */
440 sect_offset sect_off
;
442 /* Offset to first die in this cu from the start of the cu.
443 This will be the first byte following the compilation unit header. */
444 cu_offset first_die_cu_offset
;
446 /* 64-bit signature of this type unit - it is valid only for
447 UNIT_TYPE DW_UT_type. */
450 /* For types, offset in the type's DIE of the type defined by this TU. */
451 cu_offset type_cu_offset_in_tu
;
454 /* Type used for delaying computation of method physnames.
455 See comments for compute_delayed_physnames. */
456 struct delayed_method_info
458 /* The type to which the method is attached, i.e., its parent class. */
461 /* The index of the method in the type's function fieldlists. */
464 /* The index of the method in the fieldlist. */
467 /* The name of the DIE. */
470 /* The DIE associated with this method. */
471 struct die_info
*die
;
474 typedef struct delayed_method_info delayed_method_info
;
475 DEF_VEC_O (delayed_method_info
);
477 /* Internal state when decoding a particular compilation unit. */
480 /* The objfile containing this compilation unit. */
481 struct objfile
*objfile
;
483 /* The header of the compilation unit. */
484 struct comp_unit_head header
;
486 /* Base address of this compilation unit. */
487 CORE_ADDR base_address
;
489 /* Non-zero if base_address has been set. */
492 /* The language we are debugging. */
493 enum language language
;
494 const struct language_defn
*language_defn
;
496 const char *producer
;
498 /* The generic symbol table building routines have separate lists for
499 file scope symbols and all all other scopes (local scopes). So
500 we need to select the right one to pass to add_symbol_to_list().
501 We do it by keeping a pointer to the correct list in list_in_scope.
503 FIXME: The original dwarf code just treated the file scope as the
504 first local scope, and all other local scopes as nested local
505 scopes, and worked fine. Check to see if we really need to
506 distinguish these in buildsym.c. */
507 struct pending
**list_in_scope
;
509 /* The abbrev table for this CU.
510 Normally this points to the abbrev table in the objfile.
511 But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */
512 struct abbrev_table
*abbrev_table
;
514 /* Hash table holding all the loaded partial DIEs
515 with partial_die->offset.SECT_OFF as hash. */
518 /* Storage for things with the same lifetime as this read-in compilation
519 unit, including partial DIEs. */
520 struct obstack comp_unit_obstack
;
522 /* When multiple dwarf2_cu structures are living in memory, this field
523 chains them all together, so that they can be released efficiently.
524 We will probably also want a generation counter so that most-recently-used
525 compilation units are cached... */
526 struct dwarf2_per_cu_data
*read_in_chain
;
528 /* Backlink to our per_cu entry. */
529 struct dwarf2_per_cu_data
*per_cu
;
531 /* How many compilation units ago was this CU last referenced? */
534 /* A hash table of DIE cu_offset for following references with
535 die_info->offset.sect_off as hash. */
538 /* Full DIEs if read in. */
539 struct die_info
*dies
;
541 /* A set of pointers to dwarf2_per_cu_data objects for compilation
542 units referenced by this one. Only set during full symbol processing;
543 partial symbol tables do not have dependencies. */
546 /* Header data from the line table, during full symbol processing. */
547 struct line_header
*line_header
;
548 /* Non-NULL if LINE_HEADER is owned by this DWARF_CU. Otherwise,
549 it's owned by dwarf2_per_objfile::line_header_hash. If non-NULL,
550 this is the DW_TAG_compile_unit die for this CU. We'll hold on
551 to the line header as long as this DIE is being processed. See
552 process_die_scope. */
553 die_info
*line_header_die_owner
;
555 /* A list of methods which need to have physnames computed
556 after all type information has been read. */
557 VEC (delayed_method_info
) *method_list
;
559 /* To be copied to symtab->call_site_htab. */
560 htab_t call_site_htab
;
562 /* Non-NULL if this CU came from a DWO file.
563 There is an invariant here that is important to remember:
564 Except for attributes copied from the top level DIE in the "main"
565 (or "stub") file in preparation for reading the DWO file
566 (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
567 Either there isn't a DWO file (in which case this is NULL and the point
568 is moot), or there is and either we're not going to read it (in which
569 case this is NULL) or there is and we are reading it (in which case this
571 struct dwo_unit
*dwo_unit
;
573 /* The DW_AT_addr_base attribute if present, zero otherwise
574 (zero is a valid value though).
575 Note this value comes from the Fission stub CU/TU's DIE. */
578 /* The DW_AT_ranges_base attribute if present, zero otherwise
579 (zero is a valid value though).
580 Note this value comes from the Fission stub CU/TU's DIE.
581 Also note that the value is zero in the non-DWO case so this value can
582 be used without needing to know whether DWO files are in use or not.
583 N.B. This does not apply to DW_AT_ranges appearing in
584 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
585 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
586 DW_AT_ranges_base *would* have to be applied, and we'd have to care
587 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
588 ULONGEST ranges_base
;
590 /* Mark used when releasing cached dies. */
591 unsigned int mark
: 1;
593 /* This CU references .debug_loc. See the symtab->locations_valid field.
594 This test is imperfect as there may exist optimized debug code not using
595 any location list and still facing inlining issues if handled as
596 unoptimized code. For a future better test see GCC PR other/32998. */
597 unsigned int has_loclist
: 1;
599 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set
600 if all the producer_is_* fields are valid. This information is cached
601 because profiling CU expansion showed excessive time spent in
602 producer_is_gxx_lt_4_6. */
603 unsigned int checked_producer
: 1;
604 unsigned int producer_is_gxx_lt_4_6
: 1;
605 unsigned int producer_is_gcc_lt_4_3
: 1;
606 unsigned int producer_is_icc_lt_14
: 1;
608 /* When set, the file that we're processing is known to have
609 debugging info for C++ namespaces. GCC 3.3.x did not produce
610 this information, but later versions do. */
612 unsigned int processing_has_namespace_info
: 1;
615 /* Persistent data held for a compilation unit, even when not
616 processing it. We put a pointer to this structure in the
617 read_symtab_private field of the psymtab. */
619 struct dwarf2_per_cu_data
621 /* The start offset and length of this compilation unit.
622 NOTE: Unlike comp_unit_head.length, this length includes
624 If the DIE refers to a DWO file, this is always of the original die,
626 sect_offset sect_off
;
629 /* DWARF standard version this data has been read from (such as 4 or 5). */
632 /* Flag indicating this compilation unit will be read in before
633 any of the current compilation units are processed. */
634 unsigned int queued
: 1;
636 /* This flag will be set when reading partial DIEs if we need to load
637 absolutely all DIEs for this compilation unit, instead of just the ones
638 we think are interesting. It gets set if we look for a DIE in the
639 hash table and don't find it. */
640 unsigned int load_all_dies
: 1;
642 /* Non-zero if this CU is from .debug_types.
643 Struct dwarf2_per_cu_data is contained in struct signatured_type iff
645 unsigned int is_debug_types
: 1;
647 /* Non-zero if this CU is from the .dwz file. */
648 unsigned int is_dwz
: 1;
650 /* Non-zero if reading a TU directly from a DWO file, bypassing the stub.
651 This flag is only valid if is_debug_types is true.
652 We can't read a CU directly from a DWO file: There are required
653 attributes in the stub. */
654 unsigned int reading_dwo_directly
: 1;
656 /* Non-zero if the TU has been read.
657 This is used to assist the "Stay in DWO Optimization" for Fission:
658 When reading a DWO, it's faster to read TUs from the DWO instead of
659 fetching them from random other DWOs (due to comdat folding).
660 If the TU has already been read, the optimization is unnecessary
661 (and unwise - we don't want to change where gdb thinks the TU lives
663 This flag is only valid if is_debug_types is true. */
664 unsigned int tu_read
: 1;
666 /* The section this CU/TU lives in.
667 If the DIE refers to a DWO file, this is always the original die,
669 struct dwarf2_section_info
*section
;
671 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
672 of the CU cache it gets reset to NULL again. This is left as NULL for
673 dummy CUs (a CU header, but nothing else). */
674 struct dwarf2_cu
*cu
;
676 /* The corresponding objfile.
677 Normally we can get the objfile from dwarf2_per_objfile.
678 However we can enter this file with just a "per_cu" handle. */
679 struct objfile
*objfile
;
681 /* When dwarf2_per_objfile->using_index is true, the 'quick' field
682 is active. Otherwise, the 'psymtab' field is active. */
685 /* The partial symbol table associated with this compilation unit,
686 or NULL for unread partial units. */
687 struct partial_symtab
*psymtab
;
689 /* Data needed by the "quick" functions. */
690 struct dwarf2_per_cu_quick_data
*quick
;
693 /* The CUs we import using DW_TAG_imported_unit. This is filled in
694 while reading psymtabs, used to compute the psymtab dependencies,
695 and then cleared. Then it is filled in again while reading full
696 symbols, and only deleted when the objfile is destroyed.
698 This is also used to work around a difference between the way gold
699 generates .gdb_index version <=7 and the way gdb does. Arguably this
700 is a gold bug. For symbols coming from TUs, gold records in the index
701 the CU that includes the TU instead of the TU itself. This breaks
702 dw2_lookup_symbol: It assumes that if the index says symbol X lives
703 in CU/TU Y, then one need only expand Y and a subsequent lookup in Y
704 will find X. Alas TUs live in their own symtab, so after expanding CU Y
705 we need to look in TU Z to find X. Fortunately, this is akin to
706 DW_TAG_imported_unit, so we just use the same mechanism: For
707 .gdb_index version <=7 this also records the TUs that the CU referred
708 to. Concurrently with this change gdb was modified to emit version 8
709 indices so we only pay a price for gold generated indices.
710 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
711 VEC (dwarf2_per_cu_ptr
) *imported_symtabs
;
714 /* Entry in the signatured_types hash table. */
716 struct signatured_type
718 /* The "per_cu" object of this type.
719 This struct is used iff per_cu.is_debug_types.
720 N.B.: This is the first member so that it's easy to convert pointers
722 struct dwarf2_per_cu_data per_cu
;
724 /* The type's signature. */
727 /* Offset in the TU of the type's DIE, as read from the TU header.
728 If this TU is a DWO stub and the definition lives in a DWO file
729 (specified by DW_AT_GNU_dwo_name), this value is unusable. */
730 cu_offset type_offset_in_tu
;
732 /* Offset in the section of the type's DIE.
733 If the definition lives in a DWO file, this is the offset in the
734 .debug_types.dwo section.
735 The value is zero until the actual value is known.
736 Zero is otherwise not a valid section offset. */
737 sect_offset type_offset_in_section
;
739 /* Type units are grouped by their DW_AT_stmt_list entry so that they
740 can share them. This points to the containing symtab. */
741 struct type_unit_group
*type_unit_group
;
744 The first time we encounter this type we fully read it in and install it
745 in the symbol tables. Subsequent times we only need the type. */
748 /* Containing DWO unit.
749 This field is valid iff per_cu.reading_dwo_directly. */
750 struct dwo_unit
*dwo_unit
;
753 typedef struct signatured_type
*sig_type_ptr
;
754 DEF_VEC_P (sig_type_ptr
);
756 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
757 This includes type_unit_group and quick_file_names. */
759 struct stmt_list_hash
761 /* The DWO unit this table is from or NULL if there is none. */
762 struct dwo_unit
*dwo_unit
;
764 /* Offset in .debug_line or .debug_line.dwo. */
765 sect_offset line_sect_off
;
768 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
769 an object of this type. */
771 struct type_unit_group
773 /* dwarf2read.c's main "handle" on a TU symtab.
774 To simplify things we create an artificial CU that "includes" all the
775 type units using this stmt_list so that the rest of the code still has
776 a "per_cu" handle on the symtab.
777 This PER_CU is recognized by having no section. */
778 #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL)
779 struct dwarf2_per_cu_data per_cu
;
781 /* The TUs that share this DW_AT_stmt_list entry.
782 This is added to while parsing type units to build partial symtabs,
783 and is deleted afterwards and not used again. */
784 VEC (sig_type_ptr
) *tus
;
786 /* The compunit symtab.
787 Type units in a group needn't all be defined in the same source file,
788 so we create an essentially anonymous symtab as the compunit symtab. */
789 struct compunit_symtab
*compunit_symtab
;
791 /* The data used to construct the hash key. */
792 struct stmt_list_hash hash
;
794 /* The number of symtabs from the line header.
795 The value here must match line_header.num_file_names. */
796 unsigned int num_symtabs
;
798 /* The symbol tables for this TU (obtained from the files listed in
800 WARNING: The order of entries here must match the order of entries
801 in the line header. After the first TU using this type_unit_group, the
802 line header for the subsequent TUs is recreated from this. This is done
803 because we need to use the same symtabs for each TU using the same
804 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
805 there's no guarantee the line header doesn't have duplicate entries. */
806 struct symtab
**symtabs
;
809 /* These sections are what may appear in a (real or virtual) DWO file. */
813 struct dwarf2_section_info abbrev
;
814 struct dwarf2_section_info line
;
815 struct dwarf2_section_info loc
;
816 struct dwarf2_section_info loclists
;
817 struct dwarf2_section_info macinfo
;
818 struct dwarf2_section_info macro
;
819 struct dwarf2_section_info str
;
820 struct dwarf2_section_info str_offsets
;
821 /* In the case of a virtual DWO file, these two are unused. */
822 struct dwarf2_section_info info
;
823 VEC (dwarf2_section_info_def
) *types
;
826 /* CUs/TUs in DWP/DWO files. */
830 /* Backlink to the containing struct dwo_file. */
831 struct dwo_file
*dwo_file
;
833 /* The "id" that distinguishes this CU/TU.
834 .debug_info calls this "dwo_id", .debug_types calls this "signature".
835 Since signatures came first, we stick with it for consistency. */
838 /* The section this CU/TU lives in, in the DWO file. */
839 struct dwarf2_section_info
*section
;
841 /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */
842 sect_offset sect_off
;
845 /* For types, offset in the type's DIE of the type defined by this TU. */
846 cu_offset type_offset_in_tu
;
849 /* include/dwarf2.h defines the DWP section codes.
850 It defines a max value but it doesn't define a min value, which we
851 use for error checking, so provide one. */
853 enum dwp_v2_section_ids
858 /* Data for one DWO file.
860 This includes virtual DWO files (a virtual DWO file is a DWO file as it
861 appears in a DWP file). DWP files don't really have DWO files per se -
862 comdat folding of types "loses" the DWO file they came from, and from
863 a high level view DWP files appear to contain a mass of random types.
864 However, to maintain consistency with the non-DWP case we pretend DWP
865 files contain virtual DWO files, and we assign each TU with one virtual
866 DWO file (generally based on the line and abbrev section offsets -
867 a heuristic that seems to work in practice). */
871 /* The DW_AT_GNU_dwo_name attribute.
872 For virtual DWO files the name is constructed from the section offsets
873 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
874 from related CU+TUs. */
875 const char *dwo_name
;
877 /* The DW_AT_comp_dir attribute. */
878 const char *comp_dir
;
880 /* The bfd, when the file is open. Otherwise this is NULL.
881 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
884 /* The sections that make up this DWO file.
885 Remember that for virtual DWO files in DWP V2, these are virtual
886 sections (for lack of a better name). */
887 struct dwo_sections sections
;
889 /* The CUs in the file.
890 Each element is a struct dwo_unit. Multiple CUs per DWO are supported as
891 an extension to handle LLVM's Link Time Optimization output (where
892 multiple source files may be compiled into a single object/dwo pair). */
895 /* Table of TUs in the file.
896 Each element is a struct dwo_unit. */
900 /* These sections are what may appear in a DWP file. */
904 /* These are used by both DWP version 1 and 2. */
905 struct dwarf2_section_info str
;
906 struct dwarf2_section_info cu_index
;
907 struct dwarf2_section_info tu_index
;
909 /* These are only used by DWP version 2 files.
910 In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other
911 sections are referenced by section number, and are not recorded here.
912 In DWP version 2 there is at most one copy of all these sections, each
913 section being (effectively) comprised of the concatenation of all of the
914 individual sections that exist in the version 1 format.
915 To keep the code simple we treat each of these concatenated pieces as a
916 section itself (a virtual section?). */
917 struct dwarf2_section_info abbrev
;
918 struct dwarf2_section_info info
;
919 struct dwarf2_section_info line
;
920 struct dwarf2_section_info loc
;
921 struct dwarf2_section_info macinfo
;
922 struct dwarf2_section_info macro
;
923 struct dwarf2_section_info str_offsets
;
924 struct dwarf2_section_info types
;
927 /* These sections are what may appear in a virtual DWO file in DWP version 1.
928 A virtual DWO file is a DWO file as it appears in a DWP file. */
930 struct virtual_v1_dwo_sections
932 struct dwarf2_section_info abbrev
;
933 struct dwarf2_section_info line
;
934 struct dwarf2_section_info loc
;
935 struct dwarf2_section_info macinfo
;
936 struct dwarf2_section_info macro
;
937 struct dwarf2_section_info str_offsets
;
938 /* Each DWP hash table entry records one CU or one TU.
939 That is recorded here, and copied to dwo_unit.section. */
940 struct dwarf2_section_info info_or_types
;
943 /* Similar to virtual_v1_dwo_sections, but for DWP version 2.
944 In version 2, the sections of the DWO files are concatenated together
945 and stored in one section of that name. Thus each ELF section contains
946 several "virtual" sections. */
948 struct virtual_v2_dwo_sections
950 bfd_size_type abbrev_offset
;
951 bfd_size_type abbrev_size
;
953 bfd_size_type line_offset
;
954 bfd_size_type line_size
;
956 bfd_size_type loc_offset
;
957 bfd_size_type loc_size
;
959 bfd_size_type macinfo_offset
;
960 bfd_size_type macinfo_size
;
962 bfd_size_type macro_offset
;
963 bfd_size_type macro_size
;
965 bfd_size_type str_offsets_offset
;
966 bfd_size_type str_offsets_size
;
968 /* Each DWP hash table entry records one CU or one TU.
969 That is recorded here, and copied to dwo_unit.section. */
970 bfd_size_type info_or_types_offset
;
971 bfd_size_type info_or_types_size
;
974 /* Contents of DWP hash tables. */
976 struct dwp_hash_table
978 uint32_t version
, nr_columns
;
979 uint32_t nr_units
, nr_slots
;
980 const gdb_byte
*hash_table
, *unit_table
;
985 const gdb_byte
*indices
;
989 /* This is indexed by column number and gives the id of the section
991 #define MAX_NR_V2_DWO_SECTIONS \
992 (1 /* .debug_info or .debug_types */ \
993 + 1 /* .debug_abbrev */ \
994 + 1 /* .debug_line */ \
995 + 1 /* .debug_loc */ \
996 + 1 /* .debug_str_offsets */ \
997 + 1 /* .debug_macro or .debug_macinfo */)
998 int section_ids
[MAX_NR_V2_DWO_SECTIONS
];
999 const gdb_byte
*offsets
;
1000 const gdb_byte
*sizes
;
1005 /* Data for one DWP file. */
1009 /* Name of the file. */
1012 /* File format version. */
1018 /* Section info for this file. */
1019 struct dwp_sections sections
;
1021 /* Table of CUs in the file. */
1022 const struct dwp_hash_table
*cus
;
1024 /* Table of TUs in the file. */
1025 const struct dwp_hash_table
*tus
;
1027 /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
1031 /* Table to map ELF section numbers to their sections.
1032 This is only needed for the DWP V1 file format. */
1033 unsigned int num_sections
;
1034 asection
**elf_sections
;
1037 /* This represents a '.dwz' file. */
1041 /* A dwz file can only contain a few sections. */
1042 struct dwarf2_section_info abbrev
;
1043 struct dwarf2_section_info info
;
1044 struct dwarf2_section_info str
;
1045 struct dwarf2_section_info line
;
1046 struct dwarf2_section_info macro
;
1047 struct dwarf2_section_info gdb_index
;
1049 /* The dwz's BFD. */
1053 /* Struct used to pass misc. parameters to read_die_and_children, et
1054 al. which are used for both .debug_info and .debug_types dies.
1055 All parameters here are unchanging for the life of the call. This
1056 struct exists to abstract away the constant parameters of die reading. */
1058 struct die_reader_specs
1060 /* The bfd of die_section. */
1063 /* The CU of the DIE we are parsing. */
1064 struct dwarf2_cu
*cu
;
1066 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
1067 struct dwo_file
*dwo_file
;
1069 /* The section the die comes from.
1070 This is either .debug_info or .debug_types, or the .dwo variants. */
1071 struct dwarf2_section_info
*die_section
;
1073 /* die_section->buffer. */
1074 const gdb_byte
*buffer
;
1076 /* The end of the buffer. */
1077 const gdb_byte
*buffer_end
;
1079 /* The value of the DW_AT_comp_dir attribute. */
1080 const char *comp_dir
;
1083 /* Type of function passed to init_cutu_and_read_dies, et.al. */
1084 typedef void (die_reader_func_ftype
) (const struct die_reader_specs
*reader
,
1085 const gdb_byte
*info_ptr
,
1086 struct die_info
*comp_unit_die
,
1090 /* A 1-based directory index. This is a strong typedef to prevent
1091 accidentally using a directory index as a 0-based index into an
1093 enum class dir_index
: unsigned int {};
1095 /* Likewise, a 1-based file name index. */
1096 enum class file_name_index
: unsigned int {};
1100 file_entry () = default;
1102 file_entry (const char *name_
, dir_index d_index_
,
1103 unsigned int mod_time_
, unsigned int length_
)
1106 mod_time (mod_time_
),
1110 /* Return the include directory at D_INDEX stored in LH. Returns
1111 NULL if D_INDEX is out of bounds. */
1112 const char *include_dir (const line_header
*lh
) const;
1114 /* The file name. Note this is an observing pointer. The memory is
1115 owned by debug_line_buffer. */
1116 const char *name
{};
1118 /* The directory index (1-based). */
1119 dir_index d_index
{};
1121 unsigned int mod_time
{};
1123 unsigned int length
{};
1125 /* True if referenced by the Line Number Program. */
1128 /* The associated symbol table, if any. */
1129 struct symtab
*symtab
{};
1132 /* The line number information for a compilation unit (found in the
1133 .debug_line section) begins with a "statement program header",
1134 which contains the following information. */
1141 /* Add an entry to the include directory table. */
1142 void add_include_dir (const char *include_dir
);
1144 /* Add an entry to the file name table. */
1145 void add_file_name (const char *name
, dir_index d_index
,
1146 unsigned int mod_time
, unsigned int length
);
1148 /* Return the include dir at INDEX (1-based). Returns NULL if INDEX
1149 is out of bounds. */
1150 const char *include_dir_at (dir_index index
) const
1152 /* Convert directory index number (1-based) to vector index
1154 size_t vec_index
= to_underlying (index
) - 1;
1156 if (vec_index
>= include_dirs
.size ())
1158 return include_dirs
[vec_index
];
1161 /* Return the file name at INDEX (1-based). Returns NULL if INDEX
1162 is out of bounds. */
1163 file_entry
*file_name_at (file_name_index index
)
1165 /* Convert file name index number (1-based) to vector index
1167 size_t vec_index
= to_underlying (index
) - 1;
1169 if (vec_index
>= file_names
.size ())
1171 return &file_names
[vec_index
];
1174 /* Const version of the above. */
1175 const file_entry
*file_name_at (unsigned int index
) const
1177 if (index
>= file_names
.size ())
1179 return &file_names
[index
];
1182 /* Offset of line number information in .debug_line section. */
1183 sect_offset sect_off
{};
1185 /* OFFSET is for struct dwz_file associated with dwarf2_per_objfile. */
1186 unsigned offset_in_dwz
: 1; /* Can't initialize bitfields in-class. */
1188 unsigned int total_length
{};
1189 unsigned short version
{};
1190 unsigned int header_length
{};
1191 unsigned char minimum_instruction_length
{};
1192 unsigned char maximum_ops_per_instruction
{};
1193 unsigned char default_is_stmt
{};
1195 unsigned char line_range
{};
1196 unsigned char opcode_base
{};
1198 /* standard_opcode_lengths[i] is the number of operands for the
1199 standard opcode whose value is i. This means that
1200 standard_opcode_lengths[0] is unused, and the last meaningful
1201 element is standard_opcode_lengths[opcode_base - 1]. */
1202 std::unique_ptr
<unsigned char[]> standard_opcode_lengths
;
1204 /* The include_directories table. Note these are observing
1205 pointers. The memory is owned by debug_line_buffer. */
1206 std::vector
<const char *> include_dirs
;
1208 /* The file_names table. */
1209 std::vector
<file_entry
> file_names
;
1211 /* The start and end of the statement program following this
1212 header. These point into dwarf2_per_objfile->line_buffer. */
1213 const gdb_byte
*statement_program_start
{}, *statement_program_end
{};
1216 typedef std::unique_ptr
<line_header
> line_header_up
;
1219 file_entry::include_dir (const line_header
*lh
) const
1221 return lh
->include_dir_at (d_index
);
1224 /* When we construct a partial symbol table entry we only
1225 need this much information. */
1226 struct partial_die_info
1228 /* Offset of this DIE. */
1229 sect_offset sect_off
;
1231 /* DWARF-2 tag for this DIE. */
1232 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1234 /* Assorted flags describing the data found in this DIE. */
1235 unsigned int has_children
: 1;
1236 unsigned int is_external
: 1;
1237 unsigned int is_declaration
: 1;
1238 unsigned int has_type
: 1;
1239 unsigned int has_specification
: 1;
1240 unsigned int has_pc_info
: 1;
1241 unsigned int may_be_inlined
: 1;
1243 /* This DIE has been marked DW_AT_main_subprogram. */
1244 unsigned int main_subprogram
: 1;
1246 /* Flag set if the SCOPE field of this structure has been
1248 unsigned int scope_set
: 1;
1250 /* Flag set if the DIE has a byte_size attribute. */
1251 unsigned int has_byte_size
: 1;
1253 /* Flag set if the DIE has a DW_AT_const_value attribute. */
1254 unsigned int has_const_value
: 1;
1256 /* Flag set if any of the DIE's children are template arguments. */
1257 unsigned int has_template_arguments
: 1;
1259 /* Flag set if fixup_partial_die has been called on this die. */
1260 unsigned int fixup_called
: 1;
1262 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
1263 unsigned int is_dwz
: 1;
1265 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
1266 unsigned int spec_is_dwz
: 1;
1268 /* The name of this DIE. Normally the value of DW_AT_name, but
1269 sometimes a default name for unnamed DIEs. */
1272 /* The linkage name, if present. */
1273 const char *linkage_name
;
1275 /* The scope to prepend to our children. This is generally
1276 allocated on the comp_unit_obstack, so will disappear
1277 when this compilation unit leaves the cache. */
1280 /* Some data associated with the partial DIE. The tag determines
1281 which field is live. */
1284 /* The location description associated with this DIE, if any. */
1285 struct dwarf_block
*locdesc
;
1286 /* The offset of an import, for DW_TAG_imported_unit. */
1287 sect_offset sect_off
;
1290 /* If HAS_PC_INFO, the PC range associated with this DIE. */
1294 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
1295 DW_AT_sibling, if any. */
1296 /* NOTE: This member isn't strictly necessary, read_partial_die could
1297 return DW_AT_sibling values to its caller load_partial_dies. */
1298 const gdb_byte
*sibling
;
1300 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
1301 DW_AT_specification (or DW_AT_abstract_origin or
1302 DW_AT_extension). */
1303 sect_offset spec_offset
;
1305 /* Pointers to this DIE's parent, first child, and next sibling,
1307 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
1310 /* This data structure holds the information of an abbrev. */
1313 unsigned int number
; /* number identifying abbrev */
1314 enum dwarf_tag tag
; /* dwarf tag */
1315 unsigned short has_children
; /* boolean */
1316 unsigned short num_attrs
; /* number of attributes */
1317 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
1318 struct abbrev_info
*next
; /* next in chain */
1323 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1324 ENUM_BITFIELD(dwarf_form
) form
: 16;
1326 /* It is valid only if FORM is DW_FORM_implicit_const. */
1327 LONGEST implicit_const
;
1330 /* Size of abbrev_table.abbrev_hash_table. */
1331 #define ABBREV_HASH_SIZE 121
1333 /* Top level data structure to contain an abbreviation table. */
1337 /* Where the abbrev table came from.
1338 This is used as a sanity check when the table is used. */
1339 sect_offset sect_off
;
1341 /* Storage for the abbrev table. */
1342 struct obstack abbrev_obstack
;
1344 /* Hash table of abbrevs.
1345 This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
1346 It could be statically allocated, but the previous code didn't so we
1348 struct abbrev_info
**abbrevs
;
1351 /* Attributes have a name and a value. */
1354 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1355 ENUM_BITFIELD(dwarf_form
) form
: 15;
1357 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
1358 field should be in u.str (existing only for DW_STRING) but it is kept
1359 here for better struct attribute alignment. */
1360 unsigned int string_is_canonical
: 1;
1365 struct dwarf_block
*blk
;
1374 /* This data structure holds a complete die structure. */
1377 /* DWARF-2 tag for this DIE. */
1378 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1380 /* Number of attributes */
1381 unsigned char num_attrs
;
1383 /* True if we're presently building the full type name for the
1384 type derived from this DIE. */
1385 unsigned char building_fullname
: 1;
1387 /* True if this die is in process. PR 16581. */
1388 unsigned char in_process
: 1;
1391 unsigned int abbrev
;
1393 /* Offset in .debug_info or .debug_types section. */
1394 sect_offset sect_off
;
1396 /* The dies in a compilation unit form an n-ary tree. PARENT
1397 points to this die's parent; CHILD points to the first child of
1398 this node; and all the children of a given node are chained
1399 together via their SIBLING fields. */
1400 struct die_info
*child
; /* Its first child, if any. */
1401 struct die_info
*sibling
; /* Its next sibling, if any. */
1402 struct die_info
*parent
; /* Its parent, if any. */
1404 /* An array of attributes, with NUM_ATTRS elements. There may be
1405 zero, but it's not common and zero-sized arrays are not
1406 sufficiently portable C. */
1407 struct attribute attrs
[1];
1410 /* Get at parts of an attribute structure. */
1412 #define DW_STRING(attr) ((attr)->u.str)
1413 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
1414 #define DW_UNSND(attr) ((attr)->u.unsnd)
1415 #define DW_BLOCK(attr) ((attr)->u.blk)
1416 #define DW_SND(attr) ((attr)->u.snd)
1417 #define DW_ADDR(attr) ((attr)->u.addr)
1418 #define DW_SIGNATURE(attr) ((attr)->u.signature)
1420 /* Blocks are a bunch of untyped bytes. */
1425 /* Valid only if SIZE is not zero. */
1426 const gdb_byte
*data
;
1429 #ifndef ATTR_ALLOC_CHUNK
1430 #define ATTR_ALLOC_CHUNK 4
1433 /* Allocate fields for structs, unions and enums in this size. */
1434 #ifndef DW_FIELD_ALLOC_CHUNK
1435 #define DW_FIELD_ALLOC_CHUNK 4
1438 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1439 but this would require a corresponding change in unpack_field_as_long
1441 static int bits_per_byte
= 8;
1445 struct nextfield
*next
;
1453 struct nextfnfield
*next
;
1454 struct fn_field fnfield
;
1461 struct nextfnfield
*head
;
1464 struct typedef_field_list
1466 struct typedef_field field
;
1467 struct typedef_field_list
*next
;
1470 /* The routines that read and process dies for a C struct or C++ class
1471 pass lists of data member fields and lists of member function fields
1472 in an instance of a field_info structure, as defined below. */
1475 /* List of data member and baseclasses fields. */
1476 struct nextfield
*fields
, *baseclasses
;
1478 /* Number of fields (including baseclasses). */
1481 /* Number of baseclasses. */
1484 /* Set if the accesibility of one of the fields is not public. */
1485 int non_public_fields
;
1487 /* Member function fieldlist array, contains name of possibly overloaded
1488 member function, number of overloaded member functions and a pointer
1489 to the head of the member function field chain. */
1490 struct fnfieldlist
*fnfieldlists
;
1492 /* Number of entries in the fnfieldlists array. */
1495 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1496 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1497 struct typedef_field_list
*typedef_field_list
;
1498 unsigned typedef_field_list_count
;
1501 /* One item on the queue of compilation units to read in full symbols
1503 struct dwarf2_queue_item
1505 struct dwarf2_per_cu_data
*per_cu
;
1506 enum language pretend_language
;
1507 struct dwarf2_queue_item
*next
;
1510 /* The current queue. */
1511 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
1513 /* Loaded secondary compilation units are kept in memory until they
1514 have not been referenced for the processing of this many
1515 compilation units. Set this to zero to disable caching. Cache
1516 sizes of up to at least twenty will improve startup time for
1517 typical inter-CU-reference binaries, at an obvious memory cost. */
1518 static int dwarf_max_cache_age
= 5;
1520 show_dwarf_max_cache_age (struct ui_file
*file
, int from_tty
,
1521 struct cmd_list_element
*c
, const char *value
)
1523 fprintf_filtered (file
, _("The upper bound on the age of cached "
1524 "DWARF compilation units is %s.\n"),
1528 /* local function prototypes */
1530 static const char *get_section_name (const struct dwarf2_section_info
*);
1532 static const char *get_section_file_name (const struct dwarf2_section_info
*);
1534 static void dwarf2_find_base_address (struct die_info
*die
,
1535 struct dwarf2_cu
*cu
);
1537 static struct partial_symtab
*create_partial_symtab
1538 (struct dwarf2_per_cu_data
*per_cu
, const char *name
);
1540 static void build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
1541 const gdb_byte
*info_ptr
,
1542 struct die_info
*type_unit_die
,
1543 int has_children
, void *data
);
1545 static void dwarf2_build_psymtabs_hard (struct objfile
*);
1547 static void scan_partial_symbols (struct partial_die_info
*,
1548 CORE_ADDR
*, CORE_ADDR
*,
1549 int, struct dwarf2_cu
*);
1551 static void add_partial_symbol (struct partial_die_info
*,
1552 struct dwarf2_cu
*);
1554 static void add_partial_namespace (struct partial_die_info
*pdi
,
1555 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1556 int set_addrmap
, struct dwarf2_cu
*cu
);
1558 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1559 CORE_ADDR
*highpc
, int set_addrmap
,
1560 struct dwarf2_cu
*cu
);
1562 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1563 struct dwarf2_cu
*cu
);
1565 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1566 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1567 int need_pc
, struct dwarf2_cu
*cu
);
1569 static void dwarf2_read_symtab (struct partial_symtab
*,
1572 static void psymtab_to_symtab_1 (struct partial_symtab
*);
1574 static struct abbrev_info
*abbrev_table_lookup_abbrev
1575 (const struct abbrev_table
*, unsigned int);
1577 static struct abbrev_table
*abbrev_table_read_table
1578 (struct dwarf2_section_info
*, sect_offset
);
1580 static void abbrev_table_free (struct abbrev_table
*);
1582 static void abbrev_table_free_cleanup (void *);
1584 static void dwarf2_read_abbrevs (struct dwarf2_cu
*,
1585 struct dwarf2_section_info
*);
1587 static void dwarf2_free_abbrev_table (void *);
1589 static unsigned int peek_abbrev_code (bfd
*, const gdb_byte
*);
1591 static struct partial_die_info
*load_partial_dies
1592 (const struct die_reader_specs
*, const gdb_byte
*, int);
1594 static const gdb_byte
*read_partial_die (const struct die_reader_specs
*,
1595 struct partial_die_info
*,
1596 struct abbrev_info
*,
1600 static struct partial_die_info
*find_partial_die (sect_offset
, int,
1601 struct dwarf2_cu
*);
1603 static void fixup_partial_die (struct partial_die_info
*,
1604 struct dwarf2_cu
*);
1606 static const gdb_byte
*read_attribute (const struct die_reader_specs
*,
1607 struct attribute
*, struct attr_abbrev
*,
1610 static unsigned int read_1_byte (bfd
*, const gdb_byte
*);
1612 static int read_1_signed_byte (bfd
*, const gdb_byte
*);
1614 static unsigned int read_2_bytes (bfd
*, const gdb_byte
*);
1616 static unsigned int read_4_bytes (bfd
*, const gdb_byte
*);
1618 static ULONGEST
read_8_bytes (bfd
*, const gdb_byte
*);
1620 static CORE_ADDR
read_address (bfd
*, const gdb_byte
*ptr
, struct dwarf2_cu
*,
1623 static LONGEST
read_initial_length (bfd
*, const gdb_byte
*, unsigned int *);
1625 static LONGEST read_checked_initial_length_and_offset
1626 (bfd
*, const gdb_byte
*, const struct comp_unit_head
*,
1627 unsigned int *, unsigned int *);
1629 static LONGEST
read_offset (bfd
*, const gdb_byte
*,
1630 const struct comp_unit_head
*,
1633 static LONGEST
read_offset_1 (bfd
*, const gdb_byte
*, unsigned int);
1635 static sect_offset
read_abbrev_offset (struct dwarf2_section_info
*,
1638 static const gdb_byte
*read_n_bytes (bfd
*, const gdb_byte
*, unsigned int);
1640 static const char *read_direct_string (bfd
*, const gdb_byte
*, unsigned int *);
1642 static const char *read_indirect_string (bfd
*, const gdb_byte
*,
1643 const struct comp_unit_head
*,
1646 static const char *read_indirect_line_string (bfd
*, const gdb_byte
*,
1647 const struct comp_unit_head
*,
1650 static const char *read_indirect_string_from_dwz (struct dwz_file
*, LONGEST
);
1652 static LONGEST
read_signed_leb128 (bfd
*, const gdb_byte
*, unsigned int *);
1654 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*,
1658 static const char *read_str_index (const struct die_reader_specs
*reader
,
1659 ULONGEST str_index
);
1661 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1663 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1664 struct dwarf2_cu
*);
1666 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
1669 static const char *dwarf2_string_attr (struct die_info
*die
, unsigned int name
,
1670 struct dwarf2_cu
*cu
);
1672 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1673 struct dwarf2_cu
*cu
);
1675 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1677 static struct die_info
*die_specification (struct die_info
*die
,
1678 struct dwarf2_cu
**);
1680 static line_header_up
dwarf_decode_line_header (sect_offset sect_off
,
1681 struct dwarf2_cu
*cu
);
1683 static void dwarf_decode_lines (struct line_header
*, const char *,
1684 struct dwarf2_cu
*, struct partial_symtab
*,
1685 CORE_ADDR
, int decode_mapping
);
1687 static void dwarf2_start_subfile (const char *, const char *);
1689 static struct compunit_symtab
*dwarf2_start_symtab (struct dwarf2_cu
*,
1690 const char *, const char *,
1693 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1694 struct dwarf2_cu
*);
1696 static struct symbol
*new_symbol_full (struct die_info
*, struct type
*,
1697 struct dwarf2_cu
*, struct symbol
*);
1699 static void dwarf2_const_value (const struct attribute
*, struct symbol
*,
1700 struct dwarf2_cu
*);
1702 static void dwarf2_const_value_attr (const struct attribute
*attr
,
1705 struct obstack
*obstack
,
1706 struct dwarf2_cu
*cu
, LONGEST
*value
,
1707 const gdb_byte
**bytes
,
1708 struct dwarf2_locexpr_baton
**baton
);
1710 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1712 static int need_gnat_info (struct dwarf2_cu
*);
1714 static struct type
*die_descriptive_type (struct die_info
*,
1715 struct dwarf2_cu
*);
1717 static void set_descriptive_type (struct type
*, struct die_info
*,
1718 struct dwarf2_cu
*);
1720 static struct type
*die_containing_type (struct die_info
*,
1721 struct dwarf2_cu
*);
1723 static struct type
*lookup_die_type (struct die_info
*, const struct attribute
*,
1724 struct dwarf2_cu
*);
1726 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1728 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1730 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1732 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1733 const char *suffix
, int physname
,
1734 struct dwarf2_cu
*cu
);
1736 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1738 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1740 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1742 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1744 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1746 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1747 struct dwarf2_cu
*, struct partial_symtab
*);
1749 /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return
1750 values. Keep the items ordered with increasing constraints compliance. */
1753 /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */
1754 PC_BOUNDS_NOT_PRESENT
,
1756 /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges
1757 were present but they do not form a valid range of PC addresses. */
1760 /* Discontiguous range was found - that is DW_AT_ranges was found. */
1763 /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */
1767 static enum pc_bounds_kind
dwarf2_get_pc_bounds (struct die_info
*,
1768 CORE_ADDR
*, CORE_ADDR
*,
1770 struct partial_symtab
*);
1772 static void get_scope_pc_bounds (struct die_info
*,
1773 CORE_ADDR
*, CORE_ADDR
*,
1774 struct dwarf2_cu
*);
1776 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1777 CORE_ADDR
, struct dwarf2_cu
*);
1779 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1780 struct dwarf2_cu
*);
1782 static void dwarf2_attach_fields_to_type (struct field_info
*,
1783 struct type
*, struct dwarf2_cu
*);
1785 static void dwarf2_add_member_fn (struct field_info
*,
1786 struct die_info
*, struct type
*,
1787 struct dwarf2_cu
*);
1789 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1791 struct dwarf2_cu
*);
1793 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1795 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1797 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1799 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1801 static struct using_direct
**using_directives (enum language
);
1803 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1805 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1807 static struct type
*read_module_type (struct die_info
*die
,
1808 struct dwarf2_cu
*cu
);
1810 static const char *namespace_name (struct die_info
*die
,
1811 int *is_anonymous
, struct dwarf2_cu
*);
1813 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1815 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1817 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1818 struct dwarf2_cu
*);
1820 static struct die_info
*read_die_and_siblings_1
1821 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1824 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1825 const gdb_byte
*info_ptr
,
1826 const gdb_byte
**new_info_ptr
,
1827 struct die_info
*parent
);
1829 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1830 struct die_info
**, const gdb_byte
*,
1833 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1834 struct die_info
**, const gdb_byte
*,
1837 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1839 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1842 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1844 static const char *dwarf2_full_name (const char *name
,
1845 struct die_info
*die
,
1846 struct dwarf2_cu
*cu
);
1848 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1849 struct dwarf2_cu
*cu
);
1851 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1852 struct dwarf2_cu
**);
1854 static const char *dwarf_tag_name (unsigned int);
1856 static const char *dwarf_attr_name (unsigned int);
1858 static const char *dwarf_form_name (unsigned int);
1860 static const char *dwarf_bool_name (unsigned int);
1862 static const char *dwarf_type_encoding_name (unsigned int);
1864 static struct die_info
*sibling_die (struct die_info
*);
1866 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1868 static void dump_die_for_error (struct die_info
*);
1870 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1873 /*static*/ void dump_die (struct die_info
*, int max_level
);
1875 static void store_in_ref_table (struct die_info
*,
1876 struct dwarf2_cu
*);
1878 static sect_offset
dwarf2_get_ref_die_offset (const struct attribute
*);
1880 static LONGEST
dwarf2_get_attr_constant_value (const struct attribute
*, int);
1882 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1883 const struct attribute
*,
1884 struct dwarf2_cu
**);
1886 static struct die_info
*follow_die_ref (struct die_info
*,
1887 const struct attribute
*,
1888 struct dwarf2_cu
**);
1890 static struct die_info
*follow_die_sig (struct die_info
*,
1891 const struct attribute
*,
1892 struct dwarf2_cu
**);
1894 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1895 struct dwarf2_cu
*);
1897 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1898 const struct attribute
*,
1899 struct dwarf2_cu
*);
1901 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1903 static void read_signatured_type (struct signatured_type
*);
1905 static int attr_to_dynamic_prop (const struct attribute
*attr
,
1906 struct die_info
*die
, struct dwarf2_cu
*cu
,
1907 struct dynamic_prop
*prop
);
1909 /* memory allocation interface */
1911 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1913 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1915 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1917 static int attr_form_is_block (const struct attribute
*);
1919 static int attr_form_is_section_offset (const struct attribute
*);
1921 static int attr_form_is_constant (const struct attribute
*);
1923 static int attr_form_is_ref (const struct attribute
*);
1925 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1926 struct dwarf2_loclist_baton
*baton
,
1927 const struct attribute
*attr
);
1929 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1931 struct dwarf2_cu
*cu
,
1934 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1935 const gdb_byte
*info_ptr
,
1936 struct abbrev_info
*abbrev
);
1938 static void free_stack_comp_unit (void *);
1940 static hashval_t
partial_die_hash (const void *item
);
1942 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1944 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1945 (sect_offset sect_off
, unsigned int offset_in_dwz
, struct objfile
*objfile
);
1947 static void init_one_comp_unit (struct dwarf2_cu
*cu
,
1948 struct dwarf2_per_cu_data
*per_cu
);
1950 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1951 struct die_info
*comp_unit_die
,
1952 enum language pretend_language
);
1954 static void free_heap_comp_unit (void *);
1956 static void free_cached_comp_units (void *);
1958 static void age_cached_comp_units (void);
1960 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1962 static struct type
*set_die_type (struct die_info
*, struct type
*,
1963 struct dwarf2_cu
*);
1965 static void create_all_comp_units (struct objfile
*);
1967 static int create_all_type_units (struct objfile
*);
1969 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1972 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1975 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1978 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1979 struct dwarf2_per_cu_data
*);
1981 static void dwarf2_mark (struct dwarf2_cu
*);
1983 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1985 static struct type
*get_die_type_at_offset (sect_offset
,
1986 struct dwarf2_per_cu_data
*);
1988 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1990 static void dwarf2_release_queue (void *dummy
);
1992 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1993 enum language pretend_language
);
1995 static void process_queue (void);
1997 /* The return type of find_file_and_directory. Note, the enclosed
1998 string pointers are only valid while this object is valid. */
2000 struct file_and_directory
2002 /* The filename. This is never NULL. */
2005 /* The compilation directory. NULL if not known. If we needed to
2006 compute a new string, this points to COMP_DIR_STORAGE, otherwise,
2007 points directly to the DW_AT_comp_dir string attribute owned by
2008 the obstack that owns the DIE. */
2009 const char *comp_dir
;
2011 /* If we needed to build a new string for comp_dir, this is what
2012 owns the storage. */
2013 std::string comp_dir_storage
;
2016 static file_and_directory
find_file_and_directory (struct die_info
*die
,
2017 struct dwarf2_cu
*cu
);
2019 static char *file_full_name (int file
, struct line_header
*lh
,
2020 const char *comp_dir
);
2022 /* Expected enum dwarf_unit_type for read_comp_unit_head. */
2023 enum class rcuh_kind
{ COMPILE
, TYPE
};
2025 static const gdb_byte
*read_and_check_comp_unit_head
2026 (struct comp_unit_head
*header
,
2027 struct dwarf2_section_info
*section
,
2028 struct dwarf2_section_info
*abbrev_section
, const gdb_byte
*info_ptr
,
2029 rcuh_kind section_kind
);
2031 static void init_cutu_and_read_dies
2032 (struct dwarf2_per_cu_data
*this_cu
, struct abbrev_table
*abbrev_table
,
2033 int use_existing_cu
, int keep
,
2034 die_reader_func_ftype
*die_reader_func
, void *data
);
2036 static void init_cutu_and_read_dies_simple
2037 (struct dwarf2_per_cu_data
*this_cu
,
2038 die_reader_func_ftype
*die_reader_func
, void *data
);
2040 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
2042 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
2044 static struct dwo_unit
*lookup_dwo_unit_in_dwp
2045 (struct dwp_file
*dwp_file
, const char *comp_dir
,
2046 ULONGEST signature
, int is_debug_types
);
2048 static struct dwp_file
*get_dwp_file (void);
2050 static struct dwo_unit
*lookup_dwo_comp_unit
2051 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
2053 static struct dwo_unit
*lookup_dwo_type_unit
2054 (struct signatured_type
*, const char *, const char *);
2056 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
2058 static void free_dwo_file_cleanup (void *);
2060 static void process_cu_includes (void);
2062 static void check_producer (struct dwarf2_cu
*cu
);
2064 static void free_line_header_voidp (void *arg
);
2066 /* Various complaints about symbol reading that don't abort the process. */
2069 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
2071 complaint (&symfile_complaints
,
2072 _("statement list doesn't fit in .debug_line section"));
2076 dwarf2_debug_line_missing_file_complaint (void)
2078 complaint (&symfile_complaints
,
2079 _(".debug_line section has line data without a file"));
2083 dwarf2_debug_line_missing_end_sequence_complaint (void)
2085 complaint (&symfile_complaints
,
2086 _(".debug_line section has line "
2087 "program sequence without an end"));
2091 dwarf2_complex_location_expr_complaint (void)
2093 complaint (&symfile_complaints
, _("location expression too complex"));
2097 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
2100 complaint (&symfile_complaints
,
2101 _("const value length mismatch for '%s', got %d, expected %d"),
2106 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
2108 complaint (&symfile_complaints
,
2109 _("debug info runs off end of %s section"
2111 get_section_name (section
),
2112 get_section_file_name (section
));
2116 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
2118 complaint (&symfile_complaints
,
2119 _("macro debug info contains a "
2120 "malformed macro definition:\n`%s'"),
2125 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
2127 complaint (&symfile_complaints
,
2128 _("invalid attribute class or form for '%s' in '%s'"),
2132 /* Hash function for line_header_hash. */
2135 line_header_hash (const struct line_header
*ofs
)
2137 return to_underlying (ofs
->sect_off
) ^ ofs
->offset_in_dwz
;
2140 /* Hash function for htab_create_alloc_ex for line_header_hash. */
2143 line_header_hash_voidp (const void *item
)
2145 const struct line_header
*ofs
= (const struct line_header
*) item
;
2147 return line_header_hash (ofs
);
2150 /* Equality function for line_header_hash. */
2153 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
2155 const struct line_header
*ofs_lhs
= (const struct line_header
*) item_lhs
;
2156 const struct line_header
*ofs_rhs
= (const struct line_header
*) item_rhs
;
2158 return (ofs_lhs
->sect_off
== ofs_rhs
->sect_off
2159 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
2165 /* Convert VALUE between big- and little-endian. */
2167 byte_swap (offset_type value
)
2171 result
= (value
& 0xff) << 24;
2172 result
|= (value
& 0xff00) << 8;
2173 result
|= (value
& 0xff0000) >> 8;
2174 result
|= (value
& 0xff000000) >> 24;
2178 #define MAYBE_SWAP(V) byte_swap (V)
2181 #define MAYBE_SWAP(V) static_cast<offset_type> (V)
2182 #endif /* WORDS_BIGENDIAN */
2184 /* Read the given attribute value as an address, taking the attribute's
2185 form into account. */
2188 attr_value_as_address (struct attribute
*attr
)
2192 if (attr
->form
!= DW_FORM_addr
&& attr
->form
!= DW_FORM_GNU_addr_index
)
2194 /* Aside from a few clearly defined exceptions, attributes that
2195 contain an address must always be in DW_FORM_addr form.
2196 Unfortunately, some compilers happen to be violating this
2197 requirement by encoding addresses using other forms, such
2198 as DW_FORM_data4 for example. For those broken compilers,
2199 we try to do our best, without any guarantee of success,
2200 to interpret the address correctly. It would also be nice
2201 to generate a complaint, but that would require us to maintain
2202 a list of legitimate cases where a non-address form is allowed,
2203 as well as update callers to pass in at least the CU's DWARF
2204 version. This is more overhead than what we're willing to
2205 expand for a pretty rare case. */
2206 addr
= DW_UNSND (attr
);
2209 addr
= DW_ADDR (attr
);
2214 /* The suffix for an index file. */
2215 #define INDEX_SUFFIX ".gdb-index"
2217 /* See declaration. */
2219 dwarf2_per_objfile::dwarf2_per_objfile (struct objfile
*objfile_
,
2220 const dwarf2_debug_sections
*names
)
2221 : objfile (objfile_
)
2224 names
= &dwarf2_elf_names
;
2226 bfd
*obfd
= objfile
->obfd
;
2228 for (asection
*sec
= obfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
2229 locate_sections (obfd
, sec
, *names
);
2232 dwarf2_per_objfile::~dwarf2_per_objfile ()
2234 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
2235 free_cached_comp_units ();
2237 if (quick_file_names_table
)
2238 htab_delete (quick_file_names_table
);
2240 if (line_header_hash
)
2241 htab_delete (line_header_hash
);
2243 /* Everything else should be on the objfile obstack. */
2246 /* See declaration. */
2249 dwarf2_per_objfile::free_cached_comp_units ()
2251 dwarf2_per_cu_data
*per_cu
= read_in_chain
;
2252 dwarf2_per_cu_data
**last_chain
= &read_in_chain
;
2253 while (per_cu
!= NULL
)
2255 dwarf2_per_cu_data
*next_cu
= per_cu
->cu
->read_in_chain
;
2257 free_heap_comp_unit (per_cu
->cu
);
2258 *last_chain
= next_cu
;
2263 /* Try to locate the sections we need for DWARF 2 debugging
2264 information and return true if we have enough to do something.
2265 NAMES points to the dwarf2 section names, or is NULL if the standard
2266 ELF names are used. */
2269 dwarf2_has_info (struct objfile
*objfile
,
2270 const struct dwarf2_debug_sections
*names
)
2272 dwarf2_per_objfile
= ((struct dwarf2_per_objfile
*)
2273 objfile_data (objfile
, dwarf2_objfile_data_key
));
2274 if (!dwarf2_per_objfile
)
2276 /* Initialize per-objfile state. */
2277 struct dwarf2_per_objfile
*data
2278 = XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_per_objfile
);
2280 dwarf2_per_objfile
= new (data
) struct dwarf2_per_objfile (objfile
, names
);
2281 set_objfile_data (objfile
, dwarf2_objfile_data_key
, dwarf2_per_objfile
);
2283 return (!dwarf2_per_objfile
->info
.is_virtual
2284 && dwarf2_per_objfile
->info
.s
.section
!= NULL
2285 && !dwarf2_per_objfile
->abbrev
.is_virtual
2286 && dwarf2_per_objfile
->abbrev
.s
.section
!= NULL
);
2289 /* Return the containing section of virtual section SECTION. */
2291 static struct dwarf2_section_info
*
2292 get_containing_section (const struct dwarf2_section_info
*section
)
2294 gdb_assert (section
->is_virtual
);
2295 return section
->s
.containing_section
;
2298 /* Return the bfd owner of SECTION. */
2301 get_section_bfd_owner (const struct dwarf2_section_info
*section
)
2303 if (section
->is_virtual
)
2305 section
= get_containing_section (section
);
2306 gdb_assert (!section
->is_virtual
);
2308 return section
->s
.section
->owner
;
2311 /* Return the bfd section of SECTION.
2312 Returns NULL if the section is not present. */
2315 get_section_bfd_section (const struct dwarf2_section_info
*section
)
2317 if (section
->is_virtual
)
2319 section
= get_containing_section (section
);
2320 gdb_assert (!section
->is_virtual
);
2322 return section
->s
.section
;
2325 /* Return the name of SECTION. */
2328 get_section_name (const struct dwarf2_section_info
*section
)
2330 asection
*sectp
= get_section_bfd_section (section
);
2332 gdb_assert (sectp
!= NULL
);
2333 return bfd_section_name (get_section_bfd_owner (section
), sectp
);
2336 /* Return the name of the file SECTION is in. */
2339 get_section_file_name (const struct dwarf2_section_info
*section
)
2341 bfd
*abfd
= get_section_bfd_owner (section
);
2343 return bfd_get_filename (abfd
);
2346 /* Return the id of SECTION.
2347 Returns 0 if SECTION doesn't exist. */
2350 get_section_id (const struct dwarf2_section_info
*section
)
2352 asection
*sectp
= get_section_bfd_section (section
);
2359 /* Return the flags of SECTION.
2360 SECTION (or containing section if this is a virtual section) must exist. */
2363 get_section_flags (const struct dwarf2_section_info
*section
)
2365 asection
*sectp
= get_section_bfd_section (section
);
2367 gdb_assert (sectp
!= NULL
);
2368 return bfd_get_section_flags (sectp
->owner
, sectp
);
2371 /* When loading sections, we look either for uncompressed section or for
2372 compressed section names. */
2375 section_is_p (const char *section_name
,
2376 const struct dwarf2_section_names
*names
)
2378 if (names
->normal
!= NULL
2379 && strcmp (section_name
, names
->normal
) == 0)
2381 if (names
->compressed
!= NULL
2382 && strcmp (section_name
, names
->compressed
) == 0)
2387 /* See declaration. */
2390 dwarf2_per_objfile::locate_sections (bfd
*abfd
, asection
*sectp
,
2391 const dwarf2_debug_sections
&names
)
2393 flagword aflag
= bfd_get_section_flags (abfd
, sectp
);
2395 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
2398 else if (section_is_p (sectp
->name
, &names
.info
))
2400 this->info
.s
.section
= sectp
;
2401 this->info
.size
= bfd_get_section_size (sectp
);
2403 else if (section_is_p (sectp
->name
, &names
.abbrev
))
2405 this->abbrev
.s
.section
= sectp
;
2406 this->abbrev
.size
= bfd_get_section_size (sectp
);
2408 else if (section_is_p (sectp
->name
, &names
.line
))
2410 this->line
.s
.section
= sectp
;
2411 this->line
.size
= bfd_get_section_size (sectp
);
2413 else if (section_is_p (sectp
->name
, &names
.loc
))
2415 this->loc
.s
.section
= sectp
;
2416 this->loc
.size
= bfd_get_section_size (sectp
);
2418 else if (section_is_p (sectp
->name
, &names
.loclists
))
2420 this->loclists
.s
.section
= sectp
;
2421 this->loclists
.size
= bfd_get_section_size (sectp
);
2423 else if (section_is_p (sectp
->name
, &names
.macinfo
))
2425 this->macinfo
.s
.section
= sectp
;
2426 this->macinfo
.size
= bfd_get_section_size (sectp
);
2428 else if (section_is_p (sectp
->name
, &names
.macro
))
2430 this->macro
.s
.section
= sectp
;
2431 this->macro
.size
= bfd_get_section_size (sectp
);
2433 else if (section_is_p (sectp
->name
, &names
.str
))
2435 this->str
.s
.section
= sectp
;
2436 this->str
.size
= bfd_get_section_size (sectp
);
2438 else if (section_is_p (sectp
->name
, &names
.line_str
))
2440 this->line_str
.s
.section
= sectp
;
2441 this->line_str
.size
= bfd_get_section_size (sectp
);
2443 else if (section_is_p (sectp
->name
, &names
.addr
))
2445 this->addr
.s
.section
= sectp
;
2446 this->addr
.size
= bfd_get_section_size (sectp
);
2448 else if (section_is_p (sectp
->name
, &names
.frame
))
2450 this->frame
.s
.section
= sectp
;
2451 this->frame
.size
= bfd_get_section_size (sectp
);
2453 else if (section_is_p (sectp
->name
, &names
.eh_frame
))
2455 this->eh_frame
.s
.section
= sectp
;
2456 this->eh_frame
.size
= bfd_get_section_size (sectp
);
2458 else if (section_is_p (sectp
->name
, &names
.ranges
))
2460 this->ranges
.s
.section
= sectp
;
2461 this->ranges
.size
= bfd_get_section_size (sectp
);
2463 else if (section_is_p (sectp
->name
, &names
.rnglists
))
2465 this->rnglists
.s
.section
= sectp
;
2466 this->rnglists
.size
= bfd_get_section_size (sectp
);
2468 else if (section_is_p (sectp
->name
, &names
.types
))
2470 struct dwarf2_section_info type_section
;
2472 memset (&type_section
, 0, sizeof (type_section
));
2473 type_section
.s
.section
= sectp
;
2474 type_section
.size
= bfd_get_section_size (sectp
);
2476 VEC_safe_push (dwarf2_section_info_def
, this->types
,
2479 else if (section_is_p (sectp
->name
, &names
.gdb_index
))
2481 this->gdb_index
.s
.section
= sectp
;
2482 this->gdb_index
.size
= bfd_get_section_size (sectp
);
2485 if ((bfd_get_section_flags (abfd
, sectp
) & (SEC_LOAD
| SEC_ALLOC
))
2486 && bfd_section_vma (abfd
, sectp
) == 0)
2487 this->has_section_at_zero
= true;
2490 /* A helper function that decides whether a section is empty,
2494 dwarf2_section_empty_p (const struct dwarf2_section_info
*section
)
2496 if (section
->is_virtual
)
2497 return section
->size
== 0;
2498 return section
->s
.section
== NULL
|| section
->size
== 0;
2501 /* Read the contents of the section INFO.
2502 OBJFILE is the main object file, but not necessarily the file where
2503 the section comes from. E.g., for DWO files the bfd of INFO is the bfd
2505 If the section is compressed, uncompress it before returning. */
2508 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
2512 gdb_byte
*buf
, *retbuf
;
2516 info
->buffer
= NULL
;
2519 if (dwarf2_section_empty_p (info
))
2522 sectp
= get_section_bfd_section (info
);
2524 /* If this is a virtual section we need to read in the real one first. */
2525 if (info
->is_virtual
)
2527 struct dwarf2_section_info
*containing_section
=
2528 get_containing_section (info
);
2530 gdb_assert (sectp
!= NULL
);
2531 if ((sectp
->flags
& SEC_RELOC
) != 0)
2533 error (_("Dwarf Error: DWP format V2 with relocations is not"
2534 " supported in section %s [in module %s]"),
2535 get_section_name (info
), get_section_file_name (info
));
2537 dwarf2_read_section (objfile
, containing_section
);
2538 /* Other code should have already caught virtual sections that don't
2540 gdb_assert (info
->virtual_offset
+ info
->size
2541 <= containing_section
->size
);
2542 /* If the real section is empty or there was a problem reading the
2543 section we shouldn't get here. */
2544 gdb_assert (containing_section
->buffer
!= NULL
);
2545 info
->buffer
= containing_section
->buffer
+ info
->virtual_offset
;
2549 /* If the section has relocations, we must read it ourselves.
2550 Otherwise we attach it to the BFD. */
2551 if ((sectp
->flags
& SEC_RELOC
) == 0)
2553 info
->buffer
= gdb_bfd_map_section (sectp
, &info
->size
);
2557 buf
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
2560 /* When debugging .o files, we may need to apply relocations; see
2561 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
2562 We never compress sections in .o files, so we only need to
2563 try this when the section is not compressed. */
2564 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
2567 info
->buffer
= retbuf
;
2571 abfd
= get_section_bfd_owner (info
);
2572 gdb_assert (abfd
!= NULL
);
2574 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
2575 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
2577 error (_("Dwarf Error: Can't read DWARF data"
2578 " in section %s [in module %s]"),
2579 bfd_section_name (abfd
, sectp
), bfd_get_filename (abfd
));
2583 /* A helper function that returns the size of a section in a safe way.
2584 If you are positive that the section has been read before using the
2585 size, then it is safe to refer to the dwarf2_section_info object's
2586 "size" field directly. In other cases, you must call this
2587 function, because for compressed sections the size field is not set
2588 correctly until the section has been read. */
2590 static bfd_size_type
2591 dwarf2_section_size (struct objfile
*objfile
,
2592 struct dwarf2_section_info
*info
)
2595 dwarf2_read_section (objfile
, info
);
2599 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2603 dwarf2_get_section_info (struct objfile
*objfile
,
2604 enum dwarf2_section_enum sect
,
2605 asection
**sectp
, const gdb_byte
**bufp
,
2606 bfd_size_type
*sizep
)
2608 struct dwarf2_per_objfile
*data
2609 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
2610 dwarf2_objfile_data_key
);
2611 struct dwarf2_section_info
*info
;
2613 /* We may see an objfile without any DWARF, in which case we just
2624 case DWARF2_DEBUG_FRAME
:
2625 info
= &data
->frame
;
2627 case DWARF2_EH_FRAME
:
2628 info
= &data
->eh_frame
;
2631 gdb_assert_not_reached ("unexpected section");
2634 dwarf2_read_section (objfile
, info
);
2636 *sectp
= get_section_bfd_section (info
);
2637 *bufp
= info
->buffer
;
2638 *sizep
= info
->size
;
2641 /* A helper function to find the sections for a .dwz file. */
2644 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2646 struct dwz_file
*dwz_file
= (struct dwz_file
*) arg
;
2648 /* Note that we only support the standard ELF names, because .dwz
2649 is ELF-only (at the time of writing). */
2650 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2652 dwz_file
->abbrev
.s
.section
= sectp
;
2653 dwz_file
->abbrev
.size
= bfd_get_section_size (sectp
);
2655 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2657 dwz_file
->info
.s
.section
= sectp
;
2658 dwz_file
->info
.size
= bfd_get_section_size (sectp
);
2660 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2662 dwz_file
->str
.s
.section
= sectp
;
2663 dwz_file
->str
.size
= bfd_get_section_size (sectp
);
2665 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2667 dwz_file
->line
.s
.section
= sectp
;
2668 dwz_file
->line
.size
= bfd_get_section_size (sectp
);
2670 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2672 dwz_file
->macro
.s
.section
= sectp
;
2673 dwz_file
->macro
.size
= bfd_get_section_size (sectp
);
2675 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2677 dwz_file
->gdb_index
.s
.section
= sectp
;
2678 dwz_file
->gdb_index
.size
= bfd_get_section_size (sectp
);
2682 /* Open the separate '.dwz' debug file, if needed. Return NULL if
2683 there is no .gnu_debugaltlink section in the file. Error if there
2684 is such a section but the file cannot be found. */
2686 static struct dwz_file
*
2687 dwarf2_get_dwz_file (void)
2690 struct cleanup
*cleanup
;
2691 const char *filename
;
2692 struct dwz_file
*result
;
2693 bfd_size_type buildid_len_arg
;
2697 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2698 return dwarf2_per_objfile
->dwz_file
;
2700 bfd_set_error (bfd_error_no_error
);
2701 data
= bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2702 &buildid_len_arg
, &buildid
);
2705 if (bfd_get_error () == bfd_error_no_error
)
2707 error (_("could not read '.gnu_debugaltlink' section: %s"),
2708 bfd_errmsg (bfd_get_error ()));
2710 cleanup
= make_cleanup (xfree
, data
);
2711 make_cleanup (xfree
, buildid
);
2713 buildid_len
= (size_t) buildid_len_arg
;
2715 filename
= (const char *) data
;
2717 std::string abs_storage
;
2718 if (!IS_ABSOLUTE_PATH (filename
))
2720 gdb::unique_xmalloc_ptr
<char> abs
2721 = gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2723 abs_storage
= ldirname (abs
.get ()) + SLASH_STRING
+ filename
;
2724 filename
= abs_storage
.c_str ();
2727 /* First try the file name given in the section. If that doesn't
2728 work, try to use the build-id instead. */
2729 gdb_bfd_ref_ptr
dwz_bfd (gdb_bfd_open (filename
, gnutarget
, -1));
2730 if (dwz_bfd
!= NULL
)
2732 if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2736 if (dwz_bfd
== NULL
)
2737 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2739 if (dwz_bfd
== NULL
)
2740 error (_("could not find '.gnu_debugaltlink' file for %s"),
2741 objfile_name (dwarf2_per_objfile
->objfile
));
2743 result
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
2745 result
->dwz_bfd
= dwz_bfd
.release ();
2747 bfd_map_over_sections (result
->dwz_bfd
, locate_dwz_sections
, result
);
2749 do_cleanups (cleanup
);
2751 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, result
->dwz_bfd
);
2752 dwarf2_per_objfile
->dwz_file
= result
;
2756 /* DWARF quick_symbols_functions support. */
2758 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2759 unique line tables, so we maintain a separate table of all .debug_line
2760 derived entries to support the sharing.
2761 All the quick functions need is the list of file names. We discard the
2762 line_header when we're done and don't need to record it here. */
2763 struct quick_file_names
2765 /* The data used to construct the hash key. */
2766 struct stmt_list_hash hash
;
2768 /* The number of entries in file_names, real_names. */
2769 unsigned int num_file_names
;
2771 /* The file names from the line table, after being run through
2773 const char **file_names
;
2775 /* The file names from the line table after being run through
2776 gdb_realpath. These are computed lazily. */
2777 const char **real_names
;
2780 /* When using the index (and thus not using psymtabs), each CU has an
2781 object of this type. This is used to hold information needed by
2782 the various "quick" methods. */
2783 struct dwarf2_per_cu_quick_data
2785 /* The file table. This can be NULL if there was no file table
2786 or it's currently not read in.
2787 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2788 struct quick_file_names
*file_names
;
2790 /* The corresponding symbol table. This is NULL if symbols for this
2791 CU have not yet been read. */
2792 struct compunit_symtab
*compunit_symtab
;
2794 /* A temporary mark bit used when iterating over all CUs in
2795 expand_symtabs_matching. */
2796 unsigned int mark
: 1;
2798 /* True if we've tried to read the file table and found there isn't one.
2799 There will be no point in trying to read it again next time. */
2800 unsigned int no_file_data
: 1;
2803 /* Utility hash function for a stmt_list_hash. */
2806 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2810 if (stmt_list_hash
->dwo_unit
!= NULL
)
2811 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2812 v
+= to_underlying (stmt_list_hash
->line_sect_off
);
2816 /* Utility equality function for a stmt_list_hash. */
2819 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2820 const struct stmt_list_hash
*rhs
)
2822 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2824 if (lhs
->dwo_unit
!= NULL
2825 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2828 return lhs
->line_sect_off
== rhs
->line_sect_off
;
2831 /* Hash function for a quick_file_names. */
2834 hash_file_name_entry (const void *e
)
2836 const struct quick_file_names
*file_data
2837 = (const struct quick_file_names
*) e
;
2839 return hash_stmt_list_entry (&file_data
->hash
);
2842 /* Equality function for a quick_file_names. */
2845 eq_file_name_entry (const void *a
, const void *b
)
2847 const struct quick_file_names
*ea
= (const struct quick_file_names
*) a
;
2848 const struct quick_file_names
*eb
= (const struct quick_file_names
*) b
;
2850 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2853 /* Delete function for a quick_file_names. */
2856 delete_file_name_entry (void *e
)
2858 struct quick_file_names
*file_data
= (struct quick_file_names
*) e
;
2861 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2863 xfree ((void*) file_data
->file_names
[i
]);
2864 if (file_data
->real_names
)
2865 xfree ((void*) file_data
->real_names
[i
]);
2868 /* The space for the struct itself lives on objfile_obstack,
2869 so we don't free it here. */
2872 /* Create a quick_file_names hash table. */
2875 create_quick_file_names_table (unsigned int nr_initial_entries
)
2877 return htab_create_alloc (nr_initial_entries
,
2878 hash_file_name_entry
, eq_file_name_entry
,
2879 delete_file_name_entry
, xcalloc
, xfree
);
2882 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2883 have to be created afterwards. You should call age_cached_comp_units after
2884 processing PER_CU->CU. dw2_setup must have been already called. */
2887 load_cu (struct dwarf2_per_cu_data
*per_cu
)
2889 if (per_cu
->is_debug_types
)
2890 load_full_type_unit (per_cu
);
2892 load_full_comp_unit (per_cu
, language_minimal
);
2894 if (per_cu
->cu
== NULL
)
2895 return; /* Dummy CU. */
2897 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2900 /* Read in the symbols for PER_CU. */
2903 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2905 struct cleanup
*back_to
;
2907 /* Skip type_unit_groups, reading the type units they contain
2908 is handled elsewhere. */
2909 if (IS_TYPE_UNIT_GROUP (per_cu
))
2912 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
2914 if (dwarf2_per_objfile
->using_index
2915 ? per_cu
->v
.quick
->compunit_symtab
== NULL
2916 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2918 queue_comp_unit (per_cu
, language_minimal
);
2921 /* If we just loaded a CU from a DWO, and we're working with an index
2922 that may badly handle TUs, load all the TUs in that DWO as well.
2923 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2924 if (!per_cu
->is_debug_types
2925 && per_cu
->cu
!= NULL
2926 && per_cu
->cu
->dwo_unit
!= NULL
2927 && dwarf2_per_objfile
->index_table
!= NULL
2928 && dwarf2_per_objfile
->index_table
->version
<= 7
2929 /* DWP files aren't supported yet. */
2930 && get_dwp_file () == NULL
)
2931 queue_and_load_all_dwo_tus (per_cu
);
2936 /* Age the cache, releasing compilation units that have not
2937 been used recently. */
2938 age_cached_comp_units ();
2940 do_cleanups (back_to
);
2943 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2944 the objfile from which this CU came. Returns the resulting symbol
2947 static struct compunit_symtab
*
2948 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2950 gdb_assert (dwarf2_per_objfile
->using_index
);
2951 if (!per_cu
->v
.quick
->compunit_symtab
)
2953 struct cleanup
*back_to
= make_cleanup (free_cached_comp_units
, NULL
);
2954 scoped_restore decrementer
= increment_reading_symtab ();
2955 dw2_do_instantiate_symtab (per_cu
);
2956 process_cu_includes ();
2957 do_cleanups (back_to
);
2960 return per_cu
->v
.quick
->compunit_symtab
;
2963 /* Return the CU/TU given its index.
2965 This is intended for loops like:
2967 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2968 + dwarf2_per_objfile->n_type_units); ++i)
2970 struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i);
2976 static struct dwarf2_per_cu_data
*
2977 dw2_get_cutu (int index
)
2979 if (index
>= dwarf2_per_objfile
->n_comp_units
)
2981 index
-= dwarf2_per_objfile
->n_comp_units
;
2982 gdb_assert (index
< dwarf2_per_objfile
->n_type_units
);
2983 return &dwarf2_per_objfile
->all_type_units
[index
]->per_cu
;
2986 return dwarf2_per_objfile
->all_comp_units
[index
];
2989 /* Return the CU given its index.
2990 This differs from dw2_get_cutu in that it's for when you know INDEX
2993 static struct dwarf2_per_cu_data
*
2994 dw2_get_cu (int index
)
2996 gdb_assert (index
>= 0 && index
< dwarf2_per_objfile
->n_comp_units
);
2998 return dwarf2_per_objfile
->all_comp_units
[index
];
3001 /* A helper for create_cus_from_index that handles a given list of
3005 create_cus_from_index_list (struct objfile
*objfile
,
3006 const gdb_byte
*cu_list
, offset_type n_elements
,
3007 struct dwarf2_section_info
*section
,
3013 for (i
= 0; i
< n_elements
; i
+= 2)
3015 gdb_static_assert (sizeof (ULONGEST
) >= 8);
3017 sect_offset sect_off
3018 = (sect_offset
) extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
3019 ULONGEST length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
3022 dwarf2_per_cu_data
*the_cu
3023 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3024 struct dwarf2_per_cu_data
);
3025 the_cu
->sect_off
= sect_off
;
3026 the_cu
->length
= length
;
3027 the_cu
->objfile
= objfile
;
3028 the_cu
->section
= section
;
3029 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3030 struct dwarf2_per_cu_quick_data
);
3031 the_cu
->is_dwz
= is_dwz
;
3032 dwarf2_per_objfile
->all_comp_units
[base_offset
+ i
/ 2] = the_cu
;
3036 /* Read the CU list from the mapped index, and use it to create all
3037 the CU objects for this objfile. */
3040 create_cus_from_index (struct objfile
*objfile
,
3041 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
3042 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
3044 struct dwz_file
*dwz
;
3046 dwarf2_per_objfile
->n_comp_units
= (cu_list_elements
+ dwz_elements
) / 2;
3047 dwarf2_per_objfile
->all_comp_units
=
3048 XOBNEWVEC (&objfile
->objfile_obstack
, struct dwarf2_per_cu_data
*,
3049 dwarf2_per_objfile
->n_comp_units
);
3051 create_cus_from_index_list (objfile
, cu_list
, cu_list_elements
,
3052 &dwarf2_per_objfile
->info
, 0, 0);
3054 if (dwz_elements
== 0)
3057 dwz
= dwarf2_get_dwz_file ();
3058 create_cus_from_index_list (objfile
, dwz_list
, dwz_elements
, &dwz
->info
, 1,
3059 cu_list_elements
/ 2);
3062 /* Create the signatured type hash table from the index. */
3065 create_signatured_type_table_from_index (struct objfile
*objfile
,
3066 struct dwarf2_section_info
*section
,
3067 const gdb_byte
*bytes
,
3068 offset_type elements
)
3071 htab_t sig_types_hash
;
3073 dwarf2_per_objfile
->n_type_units
3074 = dwarf2_per_objfile
->n_allocated_type_units
3076 dwarf2_per_objfile
->all_type_units
=
3077 XNEWVEC (struct signatured_type
*, dwarf2_per_objfile
->n_type_units
);
3079 sig_types_hash
= allocate_signatured_type_table (objfile
);
3081 for (i
= 0; i
< elements
; i
+= 3)
3083 struct signatured_type
*sig_type
;
3086 cu_offset type_offset_in_tu
;
3088 gdb_static_assert (sizeof (ULONGEST
) >= 8);
3089 sect_offset sect_off
3090 = (sect_offset
) extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
3092 = (cu_offset
) extract_unsigned_integer (bytes
+ 8, 8,
3094 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
3097 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3098 struct signatured_type
);
3099 sig_type
->signature
= signature
;
3100 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
3101 sig_type
->per_cu
.is_debug_types
= 1;
3102 sig_type
->per_cu
.section
= section
;
3103 sig_type
->per_cu
.sect_off
= sect_off
;
3104 sig_type
->per_cu
.objfile
= objfile
;
3105 sig_type
->per_cu
.v
.quick
3106 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3107 struct dwarf2_per_cu_quick_data
);
3109 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
3112 dwarf2_per_objfile
->all_type_units
[i
/ 3] = sig_type
;
3115 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
3118 /* Read the address map data from the mapped index, and use it to
3119 populate the objfile's psymtabs_addrmap. */
3122 create_addrmap_from_index (struct objfile
*objfile
, struct mapped_index
*index
)
3124 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3125 const gdb_byte
*iter
, *end
;
3126 struct addrmap
*mutable_map
;
3129 auto_obstack temp_obstack
;
3131 mutable_map
= addrmap_create_mutable (&temp_obstack
);
3133 iter
= index
->address_table
;
3134 end
= iter
+ index
->address_table_size
;
3136 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3140 ULONGEST hi
, lo
, cu_index
;
3141 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
3143 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
3145 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
3150 complaint (&symfile_complaints
,
3151 _(".gdb_index address table has invalid range (%s - %s)"),
3152 hex_string (lo
), hex_string (hi
));
3156 if (cu_index
>= dwarf2_per_objfile
->n_comp_units
)
3158 complaint (&symfile_complaints
,
3159 _(".gdb_index address table has invalid CU number %u"),
3160 (unsigned) cu_index
);
3164 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
);
3165 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
);
3166 addrmap_set_empty (mutable_map
, lo
, hi
- 1, dw2_get_cutu (cu_index
));
3169 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
3170 &objfile
->objfile_obstack
);
3173 /* The hash function for strings in the mapped index. This is the same as
3174 SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the
3175 implementation. This is necessary because the hash function is tied to the
3176 format of the mapped index file. The hash values do not have to match with
3179 Use INT_MAX for INDEX_VERSION if you generate the current index format. */
3182 mapped_index_string_hash (int index_version
, const void *p
)
3184 const unsigned char *str
= (const unsigned char *) p
;
3188 while ((c
= *str
++) != 0)
3190 if (index_version
>= 5)
3192 r
= r
* 67 + c
- 113;
3198 /* Find a slot in the mapped index INDEX for the object named NAME.
3199 If NAME is found, set *VEC_OUT to point to the CU vector in the
3200 constant pool and return 1. If NAME cannot be found, return 0. */
3203 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
3204 offset_type
**vec_out
)
3206 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
3208 offset_type slot
, step
;
3209 int (*cmp
) (const char *, const char *);
3211 if (current_language
->la_language
== language_cplus
3212 || current_language
->la_language
== language_fortran
3213 || current_language
->la_language
== language_d
)
3215 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
3218 if (strchr (name
, '(') != NULL
)
3220 char *without_params
= cp_remove_params (name
);
3222 if (without_params
!= NULL
)
3224 make_cleanup (xfree
, without_params
);
3225 name
= without_params
;
3230 /* Index version 4 did not support case insensitive searches. But the
3231 indices for case insensitive languages are built in lowercase, therefore
3232 simulate our NAME being searched is also lowercased. */
3233 hash
= mapped_index_string_hash ((index
->version
== 4
3234 && case_sensitivity
== case_sensitive_off
3235 ? 5 : index
->version
),
3238 slot
= hash
& (index
->symbol_table_slots
- 1);
3239 step
= ((hash
* 17) & (index
->symbol_table_slots
- 1)) | 1;
3240 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
3244 /* Convert a slot number to an offset into the table. */
3245 offset_type i
= 2 * slot
;
3247 if (index
->symbol_table
[i
] == 0 && index
->symbol_table
[i
+ 1] == 0)
3249 do_cleanups (back_to
);
3253 str
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[i
]);
3254 if (!cmp (name
, str
))
3256 *vec_out
= (offset_type
*) (index
->constant_pool
3257 + MAYBE_SWAP (index
->symbol_table
[i
+ 1]));
3258 do_cleanups (back_to
);
3262 slot
= (slot
+ step
) & (index
->symbol_table_slots
- 1);
3266 /* A helper function that reads the .gdb_index from SECTION and fills
3267 in MAP. FILENAME is the name of the file containing the section;
3268 it is used for error reporting. DEPRECATED_OK is nonzero if it is
3269 ok to use deprecated sections.
3271 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
3272 out parameters that are filled in with information about the CU and
3273 TU lists in the section.
3275 Returns 1 if all went well, 0 otherwise. */
3278 read_index_from_section (struct objfile
*objfile
,
3279 const char *filename
,
3281 struct dwarf2_section_info
*section
,
3282 struct mapped_index
*map
,
3283 const gdb_byte
**cu_list
,
3284 offset_type
*cu_list_elements
,
3285 const gdb_byte
**types_list
,
3286 offset_type
*types_list_elements
)
3288 const gdb_byte
*addr
;
3289 offset_type version
;
3290 offset_type
*metadata
;
3293 if (dwarf2_section_empty_p (section
))
3296 /* Older elfutils strip versions could keep the section in the main
3297 executable while splitting it for the separate debug info file. */
3298 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
3301 dwarf2_read_section (objfile
, section
);
3303 addr
= section
->buffer
;
3304 /* Version check. */
3305 version
= MAYBE_SWAP (*(offset_type
*) addr
);
3306 /* Versions earlier than 3 emitted every copy of a psymbol. This
3307 causes the index to behave very poorly for certain requests. Version 3
3308 contained incomplete addrmap. So, it seems better to just ignore such
3312 static int warning_printed
= 0;
3313 if (!warning_printed
)
3315 warning (_("Skipping obsolete .gdb_index section in %s."),
3317 warning_printed
= 1;
3321 /* Index version 4 uses a different hash function than index version
3324 Versions earlier than 6 did not emit psymbols for inlined
3325 functions. Using these files will cause GDB not to be able to
3326 set breakpoints on inlined functions by name, so we ignore these
3327 indices unless the user has done
3328 "set use-deprecated-index-sections on". */
3329 if (version
< 6 && !deprecated_ok
)
3331 static int warning_printed
= 0;
3332 if (!warning_printed
)
3335 Skipping deprecated .gdb_index section in %s.\n\
3336 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3337 to use the section anyway."),
3339 warning_printed
= 1;
3343 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3344 of the TU (for symbols coming from TUs),
3345 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3346 Plus gold-generated indices can have duplicate entries for global symbols,
3347 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3348 These are just performance bugs, and we can't distinguish gdb-generated
3349 indices from gold-generated ones, so issue no warning here. */
3351 /* Indexes with higher version than the one supported by GDB may be no
3352 longer backward compatible. */
3356 map
->version
= version
;
3357 map
->total_size
= section
->size
;
3359 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3362 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3363 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3367 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3368 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3369 - MAYBE_SWAP (metadata
[i
]))
3373 map
->address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3374 map
->address_table_size
= (MAYBE_SWAP (metadata
[i
+ 1])
3375 - MAYBE_SWAP (metadata
[i
]));
3378 map
->symbol_table
= (offset_type
*) (addr
+ MAYBE_SWAP (metadata
[i
]));
3379 map
->symbol_table_slots
= ((MAYBE_SWAP (metadata
[i
+ 1])
3380 - MAYBE_SWAP (metadata
[i
]))
3381 / (2 * sizeof (offset_type
)));
3384 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3390 /* Read the index file. If everything went ok, initialize the "quick"
3391 elements of all the CUs and return 1. Otherwise, return 0. */
3394 dwarf2_read_index (struct objfile
*objfile
)
3396 struct mapped_index local_map
, *map
;
3397 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3398 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3399 struct dwz_file
*dwz
;
3401 if (!read_index_from_section (objfile
, objfile_name (objfile
),
3402 use_deprecated_index_sections
,
3403 &dwarf2_per_objfile
->gdb_index
, &local_map
,
3404 &cu_list
, &cu_list_elements
,
3405 &types_list
, &types_list_elements
))
3408 /* Don't use the index if it's empty. */
3409 if (local_map
.symbol_table_slots
== 0)
3412 /* If there is a .dwz file, read it so we can get its CU list as
3414 dwz
= dwarf2_get_dwz_file ();
3417 struct mapped_index dwz_map
;
3418 const gdb_byte
*dwz_types_ignore
;
3419 offset_type dwz_types_elements_ignore
;
3421 if (!read_index_from_section (objfile
, bfd_get_filename (dwz
->dwz_bfd
),
3423 &dwz
->gdb_index
, &dwz_map
,
3424 &dwz_list
, &dwz_list_elements
,
3426 &dwz_types_elements_ignore
))
3428 warning (_("could not read '.gdb_index' section from %s; skipping"),
3429 bfd_get_filename (dwz
->dwz_bfd
));
3434 create_cus_from_index (objfile
, cu_list
, cu_list_elements
, dwz_list
,
3437 if (types_list_elements
)
3439 struct dwarf2_section_info
*section
;
3441 /* We can only handle a single .debug_types when we have an
3443 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
3446 section
= VEC_index (dwarf2_section_info_def
,
3447 dwarf2_per_objfile
->types
, 0);
3449 create_signatured_type_table_from_index (objfile
, section
, types_list
,
3450 types_list_elements
);
3453 create_addrmap_from_index (objfile
, &local_map
);
3455 map
= XOBNEW (&objfile
->objfile_obstack
, struct mapped_index
);
3458 dwarf2_per_objfile
->index_table
= map
;
3459 dwarf2_per_objfile
->using_index
= 1;
3460 dwarf2_per_objfile
->quick_file_names_table
=
3461 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
3466 /* A helper for the "quick" functions which sets the global
3467 dwarf2_per_objfile according to OBJFILE. */
3470 dw2_setup (struct objfile
*objfile
)
3472 dwarf2_per_objfile
= ((struct dwarf2_per_objfile
*)
3473 objfile_data (objfile
, dwarf2_objfile_data_key
));
3474 gdb_assert (dwarf2_per_objfile
);
3477 /* die_reader_func for dw2_get_file_names. */
3480 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3481 const gdb_byte
*info_ptr
,
3482 struct die_info
*comp_unit_die
,
3486 struct dwarf2_cu
*cu
= reader
->cu
;
3487 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3488 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3489 struct dwarf2_per_cu_data
*lh_cu
;
3490 struct attribute
*attr
;
3493 struct quick_file_names
*qfn
;
3495 gdb_assert (! this_cu
->is_debug_types
);
3497 /* Our callers never want to match partial units -- instead they
3498 will match the enclosing full CU. */
3499 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3501 this_cu
->v
.quick
->no_file_data
= 1;
3509 sect_offset line_offset
{};
3511 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3514 struct quick_file_names find_entry
;
3516 line_offset
= (sect_offset
) DW_UNSND (attr
);
3518 /* We may have already read in this line header (TU line header sharing).
3519 If we have we're done. */
3520 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3521 find_entry
.hash
.line_sect_off
= line_offset
;
3522 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
3523 &find_entry
, INSERT
);
3526 lh_cu
->v
.quick
->file_names
= (struct quick_file_names
*) *slot
;
3530 lh
= dwarf_decode_line_header (line_offset
, cu
);
3534 lh_cu
->v
.quick
->no_file_data
= 1;
3538 qfn
= XOBNEW (&objfile
->objfile_obstack
, struct quick_file_names
);
3539 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3540 qfn
->hash
.line_sect_off
= line_offset
;
3541 gdb_assert (slot
!= NULL
);
3544 file_and_directory fnd
= find_file_and_directory (comp_unit_die
, cu
);
3546 qfn
->num_file_names
= lh
->file_names
.size ();
3548 XOBNEWVEC (&objfile
->objfile_obstack
, const char *, lh
->file_names
.size ());
3549 for (i
= 0; i
< lh
->file_names
.size (); ++i
)
3550 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
.get (), fnd
.comp_dir
);
3551 qfn
->real_names
= NULL
;
3553 lh_cu
->v
.quick
->file_names
= qfn
;
3556 /* A helper for the "quick" functions which attempts to read the line
3557 table for THIS_CU. */
3559 static struct quick_file_names
*
3560 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3562 /* This should never be called for TUs. */
3563 gdb_assert (! this_cu
->is_debug_types
);
3564 /* Nor type unit groups. */
3565 gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu
));
3567 if (this_cu
->v
.quick
->file_names
!= NULL
)
3568 return this_cu
->v
.quick
->file_names
;
3569 /* If we know there is no line data, no point in looking again. */
3570 if (this_cu
->v
.quick
->no_file_data
)
3573 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
3575 if (this_cu
->v
.quick
->no_file_data
)
3577 return this_cu
->v
.quick
->file_names
;
3580 /* A helper for the "quick" functions which computes and caches the
3581 real path for a given file name from the line table. */
3584 dw2_get_real_path (struct objfile
*objfile
,
3585 struct quick_file_names
*qfn
, int index
)
3587 if (qfn
->real_names
== NULL
)
3588 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
3589 qfn
->num_file_names
, const char *);
3591 if (qfn
->real_names
[index
] == NULL
)
3592 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]).release ();
3594 return qfn
->real_names
[index
];
3597 static struct symtab
*
3598 dw2_find_last_source_symtab (struct objfile
*objfile
)
3600 struct compunit_symtab
*cust
;
3603 dw2_setup (objfile
);
3604 index
= dwarf2_per_objfile
->n_comp_units
- 1;
3605 cust
= dw2_instantiate_symtab (dw2_get_cutu (index
));
3608 return compunit_primary_filetab (cust
);
3611 /* Traversal function for dw2_forget_cached_source_info. */
3614 dw2_free_cached_file_names (void **slot
, void *info
)
3616 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3618 if (file_data
->real_names
)
3622 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3624 xfree ((void*) file_data
->real_names
[i
]);
3625 file_data
->real_names
[i
] = NULL
;
3633 dw2_forget_cached_source_info (struct objfile
*objfile
)
3635 dw2_setup (objfile
);
3637 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
3638 dw2_free_cached_file_names
, NULL
);
3641 /* Helper function for dw2_map_symtabs_matching_filename that expands
3642 the symtabs and calls the iterator. */
3645 dw2_map_expand_apply (struct objfile
*objfile
,
3646 struct dwarf2_per_cu_data
*per_cu
,
3647 const char *name
, const char *real_path
,
3648 gdb::function_view
<bool (symtab
*)> callback
)
3650 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3652 /* Don't visit already-expanded CUs. */
3653 if (per_cu
->v
.quick
->compunit_symtab
)
3656 /* This may expand more than one symtab, and we want to iterate over
3658 dw2_instantiate_symtab (per_cu
);
3660 return iterate_over_some_symtabs (name
, real_path
, objfile
->compunit_symtabs
,
3661 last_made
, callback
);
3664 /* Implementation of the map_symtabs_matching_filename method. */
3667 dw2_map_symtabs_matching_filename
3668 (struct objfile
*objfile
, const char *name
, const char *real_path
,
3669 gdb::function_view
<bool (symtab
*)> callback
)
3672 const char *name_basename
= lbasename (name
);
3674 dw2_setup (objfile
);
3676 /* The rule is CUs specify all the files, including those used by
3677 any TU, so there's no need to scan TUs here. */
3679 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3682 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3683 struct quick_file_names
*file_data
;
3685 /* We only need to look at symtabs not already expanded. */
3686 if (per_cu
->v
.quick
->compunit_symtab
)
3689 file_data
= dw2_get_file_names (per_cu
);
3690 if (file_data
== NULL
)
3693 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3695 const char *this_name
= file_data
->file_names
[j
];
3696 const char *this_real_name
;
3698 if (compare_filenames_for_search (this_name
, name
))
3700 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3706 /* Before we invoke realpath, which can get expensive when many
3707 files are involved, do a quick comparison of the basenames. */
3708 if (! basenames_may_differ
3709 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3712 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3713 if (compare_filenames_for_search (this_real_name
, name
))
3715 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3721 if (real_path
!= NULL
)
3723 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3724 gdb_assert (IS_ABSOLUTE_PATH (name
));
3725 if (this_real_name
!= NULL
3726 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3728 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3740 /* Struct used to manage iterating over all CUs looking for a symbol. */
3742 struct dw2_symtab_iterator
3744 /* The internalized form of .gdb_index. */
3745 struct mapped_index
*index
;
3746 /* If non-zero, only look for symbols that match BLOCK_INDEX. */
3747 int want_specific_block
;
3748 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
3749 Unused if !WANT_SPECIFIC_BLOCK. */
3751 /* The kind of symbol we're looking for. */
3753 /* The list of CUs from the index entry of the symbol,
3754 or NULL if not found. */
3756 /* The next element in VEC to look at. */
3758 /* The number of elements in VEC, or zero if there is no match. */
3760 /* Have we seen a global version of the symbol?
3761 If so we can ignore all further global instances.
3762 This is to work around gold/15646, inefficient gold-generated
3767 /* Initialize the index symtab iterator ITER.
3768 If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols
3769 in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
3772 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3773 struct mapped_index
*index
,
3774 int want_specific_block
,
3779 iter
->index
= index
;
3780 iter
->want_specific_block
= want_specific_block
;
3781 iter
->block_index
= block_index
;
3782 iter
->domain
= domain
;
3784 iter
->global_seen
= 0;
3786 if (find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3787 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3795 /* Return the next matching CU or NULL if there are no more. */
3797 static struct dwarf2_per_cu_data
*
3798 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3800 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3802 offset_type cu_index_and_attrs
=
3803 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3804 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3805 struct dwarf2_per_cu_data
*per_cu
;
3806 int want_static
= iter
->block_index
!= GLOBAL_BLOCK
;
3807 /* This value is only valid for index versions >= 7. */
3808 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3809 gdb_index_symbol_kind symbol_kind
=
3810 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3811 /* Only check the symbol attributes if they're present.
3812 Indices prior to version 7 don't record them,
3813 and indices >= 7 may elide them for certain symbols
3814 (gold does this). */
3816 (iter
->index
->version
>= 7
3817 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3819 /* Don't crash on bad data. */
3820 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
3821 + dwarf2_per_objfile
->n_type_units
))
3823 complaint (&symfile_complaints
,
3824 _(".gdb_index entry has bad CU index"
3826 objfile_name (dwarf2_per_objfile
->objfile
));
3830 per_cu
= dw2_get_cutu (cu_index
);
3832 /* Skip if already read in. */
3833 if (per_cu
->v
.quick
->compunit_symtab
)
3836 /* Check static vs global. */
3839 if (iter
->want_specific_block
3840 && want_static
!= is_static
)
3842 /* Work around gold/15646. */
3843 if (!is_static
&& iter
->global_seen
)
3846 iter
->global_seen
= 1;
3849 /* Only check the symbol's kind if it has one. */
3852 switch (iter
->domain
)
3855 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3856 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3857 /* Some types are also in VAR_DOMAIN. */
3858 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3862 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3866 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3881 static struct compunit_symtab
*
3882 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
3883 const char *name
, domain_enum domain
)
3885 struct compunit_symtab
*stab_best
= NULL
;
3886 struct mapped_index
*index
;
3888 dw2_setup (objfile
);
3890 index
= dwarf2_per_objfile
->index_table
;
3892 /* index is NULL if OBJF_READNOW. */
3895 struct dw2_symtab_iterator iter
;
3896 struct dwarf2_per_cu_data
*per_cu
;
3898 dw2_symtab_iter_init (&iter
, index
, 1, block_index
, domain
, name
);
3900 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3902 struct symbol
*sym
, *with_opaque
= NULL
;
3903 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
);
3904 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
3905 struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
3907 sym
= block_find_symbol (block
, name
, domain
,
3908 block_find_non_opaque_type_preferred
,
3911 /* Some caution must be observed with overloaded functions
3912 and methods, since the index will not contain any overload
3913 information (but NAME might contain it). */
3916 && SYMBOL_MATCHES_SEARCH_NAME (sym
, name
))
3918 if (with_opaque
!= NULL
3919 && SYMBOL_MATCHES_SEARCH_NAME (with_opaque
, name
))
3922 /* Keep looking through other CUs. */
3930 dw2_print_stats (struct objfile
*objfile
)
3932 int i
, total
, count
;
3934 dw2_setup (objfile
);
3935 total
= dwarf2_per_objfile
->n_comp_units
+ dwarf2_per_objfile
->n_type_units
;
3937 for (i
= 0; i
< total
; ++i
)
3939 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3941 if (!per_cu
->v
.quick
->compunit_symtab
)
3944 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
3945 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3948 /* This dumps minimal information about the index.
3949 It is called via "mt print objfiles".
3950 One use is to verify .gdb_index has been loaded by the
3951 gdb.dwarf2/gdb-index.exp testcase. */
3954 dw2_dump (struct objfile
*objfile
)
3956 dw2_setup (objfile
);
3957 gdb_assert (dwarf2_per_objfile
->using_index
);
3958 printf_filtered (".gdb_index:");
3959 if (dwarf2_per_objfile
->index_table
!= NULL
)
3961 printf_filtered (" version %d\n",
3962 dwarf2_per_objfile
->index_table
->version
);
3965 printf_filtered (" faked for \"readnow\"\n");
3966 printf_filtered ("\n");
3970 dw2_relocate (struct objfile
*objfile
,
3971 const struct section_offsets
*new_offsets
,
3972 const struct section_offsets
*delta
)
3974 /* There's nothing to relocate here. */
3978 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
3979 const char *func_name
)
3981 struct mapped_index
*index
;
3983 dw2_setup (objfile
);
3985 index
= dwarf2_per_objfile
->index_table
;
3987 /* index is NULL if OBJF_READNOW. */
3990 struct dw2_symtab_iterator iter
;
3991 struct dwarf2_per_cu_data
*per_cu
;
3993 /* Note: It doesn't matter what we pass for block_index here. */
3994 dw2_symtab_iter_init (&iter
, index
, 0, GLOBAL_BLOCK
, VAR_DOMAIN
,
3997 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3998 dw2_instantiate_symtab (per_cu
);
4003 dw2_expand_all_symtabs (struct objfile
*objfile
)
4007 dw2_setup (objfile
);
4009 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
4010 + dwarf2_per_objfile
->n_type_units
); ++i
)
4012 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4014 dw2_instantiate_symtab (per_cu
);
4019 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
4020 const char *fullname
)
4024 dw2_setup (objfile
);
4026 /* We don't need to consider type units here.
4027 This is only called for examining code, e.g. expand_line_sal.
4028 There can be an order of magnitude (or more) more type units
4029 than comp units, and we avoid them if we can. */
4031 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4034 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4035 struct quick_file_names
*file_data
;
4037 /* We only need to look at symtabs not already expanded. */
4038 if (per_cu
->v
.quick
->compunit_symtab
)
4041 file_data
= dw2_get_file_names (per_cu
);
4042 if (file_data
== NULL
)
4045 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
4047 const char *this_fullname
= file_data
->file_names
[j
];
4049 if (filename_cmp (this_fullname
, fullname
) == 0)
4051 dw2_instantiate_symtab (per_cu
);
4059 dw2_map_matching_symbols (struct objfile
*objfile
,
4060 const char * name
, domain_enum domain
,
4062 int (*callback
) (struct block
*,
4063 struct symbol
*, void *),
4064 void *data
, symbol_compare_ftype
*match
,
4065 symbol_compare_ftype
*ordered_compare
)
4067 /* Currently unimplemented; used for Ada. The function can be called if the
4068 current language is Ada for a non-Ada objfile using GNU index. As Ada
4069 does not look for non-Ada symbols this function should just return. */
4073 dw2_expand_symtabs_matching
4074 (struct objfile
*objfile
,
4075 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4076 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4077 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
4078 enum search_domain kind
)
4082 struct mapped_index
*index
;
4084 dw2_setup (objfile
);
4086 /* index_table is NULL if OBJF_READNOW. */
4087 if (!dwarf2_per_objfile
->index_table
)
4089 index
= dwarf2_per_objfile
->index_table
;
4091 if (file_matcher
!= NULL
)
4093 htab_up
visited_found (htab_create_alloc (10, htab_hash_pointer
,
4095 NULL
, xcalloc
, xfree
));
4096 htab_up
visited_not_found (htab_create_alloc (10, htab_hash_pointer
,
4098 NULL
, xcalloc
, xfree
));
4100 /* The rule is CUs specify all the files, including those used by
4101 any TU, so there's no need to scan TUs here. */
4103 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4106 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
4107 struct quick_file_names
*file_data
;
4112 per_cu
->v
.quick
->mark
= 0;
4114 /* We only need to look at symtabs not already expanded. */
4115 if (per_cu
->v
.quick
->compunit_symtab
)
4118 file_data
= dw2_get_file_names (per_cu
);
4119 if (file_data
== NULL
)
4122 if (htab_find (visited_not_found
.get (), file_data
) != NULL
)
4124 else if (htab_find (visited_found
.get (), file_data
) != NULL
)
4126 per_cu
->v
.quick
->mark
= 1;
4130 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
4132 const char *this_real_name
;
4134 if (file_matcher (file_data
->file_names
[j
], false))
4136 per_cu
->v
.quick
->mark
= 1;
4140 /* Before we invoke realpath, which can get expensive when many
4141 files are involved, do a quick comparison of the basenames. */
4142 if (!basenames_may_differ
4143 && !file_matcher (lbasename (file_data
->file_names
[j
]),
4147 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
4148 if (file_matcher (this_real_name
, false))
4150 per_cu
->v
.quick
->mark
= 1;
4155 slot
= htab_find_slot (per_cu
->v
.quick
->mark
4156 ? visited_found
.get ()
4157 : visited_not_found
.get (),
4163 for (iter
= 0; iter
< index
->symbol_table_slots
; ++iter
)
4165 offset_type idx
= 2 * iter
;
4167 offset_type
*vec
, vec_len
, vec_idx
;
4168 int global_seen
= 0;
4172 if (index
->symbol_table
[idx
] == 0 && index
->symbol_table
[idx
+ 1] == 0)
4175 name
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[idx
]);
4177 if (!symbol_matcher (name
))
4180 /* The name was matched, now expand corresponding CUs that were
4182 vec
= (offset_type
*) (index
->constant_pool
4183 + MAYBE_SWAP (index
->symbol_table
[idx
+ 1]));
4184 vec_len
= MAYBE_SWAP (vec
[0]);
4185 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
4187 struct dwarf2_per_cu_data
*per_cu
;
4188 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
4189 /* This value is only valid for index versions >= 7. */
4190 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
4191 gdb_index_symbol_kind symbol_kind
=
4192 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
4193 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
4194 /* Only check the symbol attributes if they're present.
4195 Indices prior to version 7 don't record them,
4196 and indices >= 7 may elide them for certain symbols
4197 (gold does this). */
4199 (index
->version
>= 7
4200 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
4202 /* Work around gold/15646. */
4205 if (!is_static
&& global_seen
)
4211 /* Only check the symbol's kind if it has one. */
4216 case VARIABLES_DOMAIN
:
4217 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
4220 case FUNCTIONS_DOMAIN
:
4221 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
4225 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4233 /* Don't crash on bad data. */
4234 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
4235 + dwarf2_per_objfile
->n_type_units
))
4237 complaint (&symfile_complaints
,
4238 _(".gdb_index entry has bad CU index"
4239 " [in module %s]"), objfile_name (objfile
));
4243 per_cu
= dw2_get_cutu (cu_index
);
4244 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
4246 int symtab_was_null
=
4247 (per_cu
->v
.quick
->compunit_symtab
== NULL
);
4249 dw2_instantiate_symtab (per_cu
);
4251 if (expansion_notify
!= NULL
4253 && per_cu
->v
.quick
->compunit_symtab
!= NULL
)
4255 expansion_notify (per_cu
->v
.quick
->compunit_symtab
);
4262 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
4265 static struct compunit_symtab
*
4266 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
4271 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
4272 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
4275 if (cust
->includes
== NULL
)
4278 for (i
= 0; cust
->includes
[i
]; ++i
)
4280 struct compunit_symtab
*s
= cust
->includes
[i
];
4282 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
4290 static struct compunit_symtab
*
4291 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
4292 struct bound_minimal_symbol msymbol
,
4294 struct obj_section
*section
,
4297 struct dwarf2_per_cu_data
*data
;
4298 struct compunit_symtab
*result
;
4300 dw2_setup (objfile
);
4302 if (!objfile
->psymtabs_addrmap
)
4305 data
= (struct dwarf2_per_cu_data
*) addrmap_find (objfile
->psymtabs_addrmap
,
4310 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
4311 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
4312 paddress (get_objfile_arch (objfile
), pc
));
4315 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
),
4317 gdb_assert (result
!= NULL
);
4322 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
4323 void *data
, int need_fullname
)
4325 dw2_setup (objfile
);
4327 if (!dwarf2_per_objfile
->filenames_cache
)
4329 dwarf2_per_objfile
->filenames_cache
.emplace ();
4331 htab_up
visited (htab_create_alloc (10,
4332 htab_hash_pointer
, htab_eq_pointer
,
4333 NULL
, xcalloc
, xfree
));
4335 /* The rule is CUs specify all the files, including those used
4336 by any TU, so there's no need to scan TUs here. We can
4337 ignore file names coming from already-expanded CUs. */
4339 for (int i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4341 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4343 if (per_cu
->v
.quick
->compunit_symtab
)
4345 void **slot
= htab_find_slot (visited
.get (),
4346 per_cu
->v
.quick
->file_names
,
4349 *slot
= per_cu
->v
.quick
->file_names
;
4353 for (int i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4356 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
4357 struct quick_file_names
*file_data
;
4360 /* We only need to look at symtabs not already expanded. */
4361 if (per_cu
->v
.quick
->compunit_symtab
)
4364 file_data
= dw2_get_file_names (per_cu
);
4365 if (file_data
== NULL
)
4368 slot
= htab_find_slot (visited
.get (), file_data
, INSERT
);
4371 /* Already visited. */
4376 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4378 const char *filename
= file_data
->file_names
[j
];
4379 dwarf2_per_objfile
->filenames_cache
->seen (filename
);
4384 dwarf2_per_objfile
->filenames_cache
->traverse ([&] (const char *filename
)
4386 gdb::unique_xmalloc_ptr
<char> this_real_name
;
4389 this_real_name
= gdb_realpath (filename
);
4390 (*fun
) (filename
, this_real_name
.get (), data
);
4395 dw2_has_symbols (struct objfile
*objfile
)
4400 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
4403 dw2_find_last_source_symtab
,
4404 dw2_forget_cached_source_info
,
4405 dw2_map_symtabs_matching_filename
,
4410 dw2_expand_symtabs_for_function
,
4411 dw2_expand_all_symtabs
,
4412 dw2_expand_symtabs_with_fullname
,
4413 dw2_map_matching_symbols
,
4414 dw2_expand_symtabs_matching
,
4415 dw2_find_pc_sect_compunit_symtab
,
4416 dw2_map_symbol_filenames
4419 /* Initialize for reading DWARF for this objfile. Return 0 if this
4420 file will use psymtabs, or 1 if using the GNU index. */
4423 dwarf2_initialize_objfile (struct objfile
*objfile
)
4425 /* If we're about to read full symbols, don't bother with the
4426 indices. In this case we also don't care if some other debug
4427 format is making psymtabs, because they are all about to be
4429 if ((objfile
->flags
& OBJF_READNOW
))
4433 dwarf2_per_objfile
->using_index
= 1;
4434 create_all_comp_units (objfile
);
4435 create_all_type_units (objfile
);
4436 dwarf2_per_objfile
->quick_file_names_table
=
4437 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
4439 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
4440 + dwarf2_per_objfile
->n_type_units
); ++i
)
4442 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4444 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4445 struct dwarf2_per_cu_quick_data
);
4448 /* Return 1 so that gdb sees the "quick" functions. However,
4449 these functions will be no-ops because we will have expanded
4454 if (dwarf2_read_index (objfile
))
4462 /* Build a partial symbol table. */
4465 dwarf2_build_psymtabs (struct objfile
*objfile
)
4468 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
4470 init_psymbol_list (objfile
, 1024);
4475 /* This isn't really ideal: all the data we allocate on the
4476 objfile's obstack is still uselessly kept around. However,
4477 freeing it seems unsafe. */
4478 psymtab_discarder
psymtabs (objfile
);
4479 dwarf2_build_psymtabs_hard (objfile
);
4482 CATCH (except
, RETURN_MASK_ERROR
)
4484 exception_print (gdb_stderr
, except
);
4489 /* Return the total length of the CU described by HEADER. */
4492 get_cu_length (const struct comp_unit_head
*header
)
4494 return header
->initial_length_size
+ header
->length
;
4497 /* Return TRUE if SECT_OFF is within CU_HEADER. */
4500 offset_in_cu_p (const comp_unit_head
*cu_header
, sect_offset sect_off
)
4502 sect_offset bottom
= cu_header
->sect_off
;
4503 sect_offset top
= cu_header
->sect_off
+ get_cu_length (cu_header
);
4505 return sect_off
>= bottom
&& sect_off
< top
;
4508 /* Find the base address of the compilation unit for range lists and
4509 location lists. It will normally be specified by DW_AT_low_pc.
4510 In DWARF-3 draft 4, the base address could be overridden by
4511 DW_AT_entry_pc. It's been removed, but GCC still uses this for
4512 compilation units with discontinuous ranges. */
4515 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
4517 struct attribute
*attr
;
4520 cu
->base_address
= 0;
4522 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
4525 cu
->base_address
= attr_value_as_address (attr
);
4530 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4533 cu
->base_address
= attr_value_as_address (attr
);
4539 /* Read in the comp unit header information from the debug_info at info_ptr.
4540 Use rcuh_kind::COMPILE as the default type if not known by the caller.
4541 NOTE: This leaves members offset, first_die_offset to be filled in
4544 static const gdb_byte
*
4545 read_comp_unit_head (struct comp_unit_head
*cu_header
,
4546 const gdb_byte
*info_ptr
,
4547 struct dwarf2_section_info
*section
,
4548 rcuh_kind section_kind
)
4551 unsigned int bytes_read
;
4552 const char *filename
= get_section_file_name (section
);
4553 bfd
*abfd
= get_section_bfd_owner (section
);
4555 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
4556 cu_header
->initial_length_size
= bytes_read
;
4557 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
4558 info_ptr
+= bytes_read
;
4559 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
4561 if (cu_header
->version
< 5)
4562 switch (section_kind
)
4564 case rcuh_kind::COMPILE
:
4565 cu_header
->unit_type
= DW_UT_compile
;
4567 case rcuh_kind::TYPE
:
4568 cu_header
->unit_type
= DW_UT_type
;
4571 internal_error (__FILE__
, __LINE__
,
4572 _("read_comp_unit_head: invalid section_kind"));
4576 cu_header
->unit_type
= static_cast<enum dwarf_unit_type
>
4577 (read_1_byte (abfd
, info_ptr
));
4579 switch (cu_header
->unit_type
)
4582 if (section_kind
!= rcuh_kind::COMPILE
)
4583 error (_("Dwarf Error: wrong unit_type in compilation unit header "
4584 "(is DW_UT_compile, should be DW_UT_type) [in module %s]"),
4588 section_kind
= rcuh_kind::TYPE
;
4591 error (_("Dwarf Error: wrong unit_type in compilation unit header "
4592 "(is %d, should be %d or %d) [in module %s]"),
4593 cu_header
->unit_type
, DW_UT_compile
, DW_UT_type
, filename
);
4596 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
4599 cu_header
->abbrev_sect_off
= (sect_offset
) read_offset (abfd
, info_ptr
,
4602 info_ptr
+= bytes_read
;
4603 if (cu_header
->version
< 5)
4605 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
4608 signed_addr
= bfd_get_sign_extend_vma (abfd
);
4609 if (signed_addr
< 0)
4610 internal_error (__FILE__
, __LINE__
,
4611 _("read_comp_unit_head: dwarf from non elf file"));
4612 cu_header
->signed_addr_p
= signed_addr
;
4614 if (section_kind
== rcuh_kind::TYPE
)
4616 LONGEST type_offset
;
4618 cu_header
->signature
= read_8_bytes (abfd
, info_ptr
);
4621 type_offset
= read_offset (abfd
, info_ptr
, cu_header
, &bytes_read
);
4622 info_ptr
+= bytes_read
;
4623 cu_header
->type_cu_offset_in_tu
= (cu_offset
) type_offset
;
4624 if (to_underlying (cu_header
->type_cu_offset_in_tu
) != type_offset
)
4625 error (_("Dwarf Error: Too big type_offset in compilation unit "
4626 "header (is %s) [in module %s]"), plongest (type_offset
),
4633 /* Helper function that returns the proper abbrev section for
4636 static struct dwarf2_section_info
*
4637 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
4639 struct dwarf2_section_info
*abbrev
;
4641 if (this_cu
->is_dwz
)
4642 abbrev
= &dwarf2_get_dwz_file ()->abbrev
;
4644 abbrev
= &dwarf2_per_objfile
->abbrev
;
4649 /* Subroutine of read_and_check_comp_unit_head and
4650 read_and_check_type_unit_head to simplify them.
4651 Perform various error checking on the header. */
4654 error_check_comp_unit_head (struct comp_unit_head
*header
,
4655 struct dwarf2_section_info
*section
,
4656 struct dwarf2_section_info
*abbrev_section
)
4658 const char *filename
= get_section_file_name (section
);
4660 if (header
->version
< 2 || header
->version
> 5)
4661 error (_("Dwarf Error: wrong version in compilation unit header "
4662 "(is %d, should be 2, 3, 4 or 5) [in module %s]"), header
->version
,
4665 if (to_underlying (header
->abbrev_sect_off
)
4666 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
4667 error (_("Dwarf Error: bad offset (0x%x) in compilation unit header "
4668 "(offset 0x%x + 6) [in module %s]"),
4669 to_underlying (header
->abbrev_sect_off
),
4670 to_underlying (header
->sect_off
),
4673 /* Cast to ULONGEST to use 64-bit arithmetic when possible to
4674 avoid potential 32-bit overflow. */
4675 if (((ULONGEST
) header
->sect_off
+ get_cu_length (header
))
4677 error (_("Dwarf Error: bad length (0x%x) in compilation unit header "
4678 "(offset 0x%x + 0) [in module %s]"),
4679 header
->length
, to_underlying (header
->sect_off
),
4683 /* Read in a CU/TU header and perform some basic error checking.
4684 The contents of the header are stored in HEADER.
4685 The result is a pointer to the start of the first DIE. */
4687 static const gdb_byte
*
4688 read_and_check_comp_unit_head (struct comp_unit_head
*header
,
4689 struct dwarf2_section_info
*section
,
4690 struct dwarf2_section_info
*abbrev_section
,
4691 const gdb_byte
*info_ptr
,
4692 rcuh_kind section_kind
)
4694 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
4695 bfd
*abfd
= get_section_bfd_owner (section
);
4697 header
->sect_off
= (sect_offset
) (beg_of_comp_unit
- section
->buffer
);
4699 info_ptr
= read_comp_unit_head (header
, info_ptr
, section
, section_kind
);
4701 header
->first_die_cu_offset
= (cu_offset
) (info_ptr
- beg_of_comp_unit
);
4703 error_check_comp_unit_head (header
, section
, abbrev_section
);
4708 /* Fetch the abbreviation table offset from a comp or type unit header. */
4711 read_abbrev_offset (struct dwarf2_section_info
*section
,
4712 sect_offset sect_off
)
4714 bfd
*abfd
= get_section_bfd_owner (section
);
4715 const gdb_byte
*info_ptr
;
4716 unsigned int initial_length_size
, offset_size
;
4719 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
4720 info_ptr
= section
->buffer
+ to_underlying (sect_off
);
4721 read_initial_length (abfd
, info_ptr
, &initial_length_size
);
4722 offset_size
= initial_length_size
== 4 ? 4 : 8;
4723 info_ptr
+= initial_length_size
;
4725 version
= read_2_bytes (abfd
, info_ptr
);
4729 /* Skip unit type and address size. */
4733 return (sect_offset
) read_offset_1 (abfd
, info_ptr
, offset_size
);
4736 /* Allocate a new partial symtab for file named NAME and mark this new
4737 partial symtab as being an include of PST. */
4740 dwarf2_create_include_psymtab (const char *name
, struct partial_symtab
*pst
,
4741 struct objfile
*objfile
)
4743 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
4745 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
4747 /* It shares objfile->objfile_obstack. */
4748 subpst
->dirname
= pst
->dirname
;
4751 subpst
->textlow
= 0;
4752 subpst
->texthigh
= 0;
4754 subpst
->dependencies
4755 = XOBNEW (&objfile
->objfile_obstack
, struct partial_symtab
*);
4756 subpst
->dependencies
[0] = pst
;
4757 subpst
->number_of_dependencies
= 1;
4759 subpst
->globals_offset
= 0;
4760 subpst
->n_global_syms
= 0;
4761 subpst
->statics_offset
= 0;
4762 subpst
->n_static_syms
= 0;
4763 subpst
->compunit_symtab
= NULL
;
4764 subpst
->read_symtab
= pst
->read_symtab
;
4767 /* No private part is necessary for include psymtabs. This property
4768 can be used to differentiate between such include psymtabs and
4769 the regular ones. */
4770 subpst
->read_symtab_private
= NULL
;
4773 /* Read the Line Number Program data and extract the list of files
4774 included by the source file represented by PST. Build an include
4775 partial symtab for each of these included files. */
4778 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
4779 struct die_info
*die
,
4780 struct partial_symtab
*pst
)
4783 struct attribute
*attr
;
4785 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
4787 lh
= dwarf_decode_line_header ((sect_offset
) DW_UNSND (attr
), cu
);
4789 return; /* No linetable, so no includes. */
4791 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
4792 dwarf_decode_lines (lh
.get (), pst
->dirname
, cu
, pst
, pst
->textlow
, 1);
4796 hash_signatured_type (const void *item
)
4798 const struct signatured_type
*sig_type
4799 = (const struct signatured_type
*) item
;
4801 /* This drops the top 32 bits of the signature, but is ok for a hash. */
4802 return sig_type
->signature
;
4806 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
4808 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
4809 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
4811 return lhs
->signature
== rhs
->signature
;
4814 /* Allocate a hash table for signatured types. */
4817 allocate_signatured_type_table (struct objfile
*objfile
)
4819 return htab_create_alloc_ex (41,
4820 hash_signatured_type
,
4823 &objfile
->objfile_obstack
,
4824 hashtab_obstack_allocate
,
4825 dummy_obstack_deallocate
);
4828 /* A helper function to add a signatured type CU to a table. */
4831 add_signatured_type_cu_to_table (void **slot
, void *datum
)
4833 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
4834 struct signatured_type
***datap
= (struct signatured_type
***) datum
;
4842 /* A helper for create_debug_types_hash_table. Read types from SECTION
4843 and fill them into TYPES_HTAB. It will process only type units,
4844 therefore DW_UT_type. */
4847 create_debug_type_hash_table (struct dwo_file
*dwo_file
,
4848 dwarf2_section_info
*section
, htab_t
&types_htab
,
4849 rcuh_kind section_kind
)
4851 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4852 struct dwarf2_section_info
*abbrev_section
;
4854 const gdb_byte
*info_ptr
, *end_ptr
;
4856 abbrev_section
= (dwo_file
!= NULL
4857 ? &dwo_file
->sections
.abbrev
4858 : &dwarf2_per_objfile
->abbrev
);
4860 if (dwarf_read_debug
)
4861 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
4862 get_section_name (section
),
4863 get_section_file_name (abbrev_section
));
4865 dwarf2_read_section (objfile
, section
);
4866 info_ptr
= section
->buffer
;
4868 if (info_ptr
== NULL
)
4871 /* We can't set abfd until now because the section may be empty or
4872 not present, in which case the bfd is unknown. */
4873 abfd
= get_section_bfd_owner (section
);
4875 /* We don't use init_cutu_and_read_dies_simple, or some such, here
4876 because we don't need to read any dies: the signature is in the
4879 end_ptr
= info_ptr
+ section
->size
;
4880 while (info_ptr
< end_ptr
)
4882 struct signatured_type
*sig_type
;
4883 struct dwo_unit
*dwo_tu
;
4885 const gdb_byte
*ptr
= info_ptr
;
4886 struct comp_unit_head header
;
4887 unsigned int length
;
4889 sect_offset sect_off
= (sect_offset
) (ptr
- section
->buffer
);
4891 /* Initialize it due to a false compiler warning. */
4892 header
.signature
= -1;
4893 header
.type_cu_offset_in_tu
= (cu_offset
) -1;
4895 /* We need to read the type's signature in order to build the hash
4896 table, but we don't need anything else just yet. */
4898 ptr
= read_and_check_comp_unit_head (&header
, section
,
4899 abbrev_section
, ptr
, section_kind
);
4901 length
= get_cu_length (&header
);
4903 /* Skip dummy type units. */
4904 if (ptr
>= info_ptr
+ length
4905 || peek_abbrev_code (abfd
, ptr
) == 0
4906 || header
.unit_type
!= DW_UT_type
)
4912 if (types_htab
== NULL
)
4915 types_htab
= allocate_dwo_unit_table (objfile
);
4917 types_htab
= allocate_signatured_type_table (objfile
);
4923 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4925 dwo_tu
->dwo_file
= dwo_file
;
4926 dwo_tu
->signature
= header
.signature
;
4927 dwo_tu
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
4928 dwo_tu
->section
= section
;
4929 dwo_tu
->sect_off
= sect_off
;
4930 dwo_tu
->length
= length
;
4934 /* N.B.: type_offset is not usable if this type uses a DWO file.
4935 The real type_offset is in the DWO file. */
4937 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4938 struct signatured_type
);
4939 sig_type
->signature
= header
.signature
;
4940 sig_type
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
4941 sig_type
->per_cu
.objfile
= objfile
;
4942 sig_type
->per_cu
.is_debug_types
= 1;
4943 sig_type
->per_cu
.section
= section
;
4944 sig_type
->per_cu
.sect_off
= sect_off
;
4945 sig_type
->per_cu
.length
= length
;
4948 slot
= htab_find_slot (types_htab
,
4949 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
4951 gdb_assert (slot
!= NULL
);
4954 sect_offset dup_sect_off
;
4958 const struct dwo_unit
*dup_tu
4959 = (const struct dwo_unit
*) *slot
;
4961 dup_sect_off
= dup_tu
->sect_off
;
4965 const struct signatured_type
*dup_tu
4966 = (const struct signatured_type
*) *slot
;
4968 dup_sect_off
= dup_tu
->per_cu
.sect_off
;
4971 complaint (&symfile_complaints
,
4972 _("debug type entry at offset 0x%x is duplicate to"
4973 " the entry at offset 0x%x, signature %s"),
4974 to_underlying (sect_off
), to_underlying (dup_sect_off
),
4975 hex_string (header
.signature
));
4977 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
4979 if (dwarf_read_debug
> 1)
4980 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature %s\n",
4981 to_underlying (sect_off
),
4982 hex_string (header
.signature
));
4988 /* Create the hash table of all entries in the .debug_types
4989 (or .debug_types.dwo) section(s).
4990 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
4991 otherwise it is NULL.
4993 The result is a pointer to the hash table or NULL if there are no types.
4995 Note: This function processes DWO files only, not DWP files. */
4998 create_debug_types_hash_table (struct dwo_file
*dwo_file
,
4999 VEC (dwarf2_section_info_def
) *types
,
5003 struct dwarf2_section_info
*section
;
5005 if (VEC_empty (dwarf2_section_info_def
, types
))
5009 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
5011 create_debug_type_hash_table (dwo_file
, section
, types_htab
,
5015 /* Create the hash table of all entries in the .debug_types section,
5016 and initialize all_type_units.
5017 The result is zero if there is an error (e.g. missing .debug_types section),
5018 otherwise non-zero. */
5021 create_all_type_units (struct objfile
*objfile
)
5023 htab_t types_htab
= NULL
;
5024 struct signatured_type
**iter
;
5026 create_debug_type_hash_table (NULL
, &dwarf2_per_objfile
->info
, types_htab
,
5027 rcuh_kind::COMPILE
);
5028 create_debug_types_hash_table (NULL
, dwarf2_per_objfile
->types
, types_htab
);
5029 if (types_htab
== NULL
)
5031 dwarf2_per_objfile
->signatured_types
= NULL
;
5035 dwarf2_per_objfile
->signatured_types
= types_htab
;
5037 dwarf2_per_objfile
->n_type_units
5038 = dwarf2_per_objfile
->n_allocated_type_units
5039 = htab_elements (types_htab
);
5040 dwarf2_per_objfile
->all_type_units
=
5041 XNEWVEC (struct signatured_type
*, dwarf2_per_objfile
->n_type_units
);
5042 iter
= &dwarf2_per_objfile
->all_type_units
[0];
5043 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
5044 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
5045 == dwarf2_per_objfile
->n_type_units
);
5050 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
5051 If SLOT is non-NULL, it is the entry to use in the hash table.
5052 Otherwise we find one. */
5054 static struct signatured_type
*
5055 add_type_unit (ULONGEST sig
, void **slot
)
5057 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5058 int n_type_units
= dwarf2_per_objfile
->n_type_units
;
5059 struct signatured_type
*sig_type
;
5061 gdb_assert (n_type_units
<= dwarf2_per_objfile
->n_allocated_type_units
);
5063 if (n_type_units
> dwarf2_per_objfile
->n_allocated_type_units
)
5065 if (dwarf2_per_objfile
->n_allocated_type_units
== 0)
5066 dwarf2_per_objfile
->n_allocated_type_units
= 1;
5067 dwarf2_per_objfile
->n_allocated_type_units
*= 2;
5068 dwarf2_per_objfile
->all_type_units
5069 = XRESIZEVEC (struct signatured_type
*,
5070 dwarf2_per_objfile
->all_type_units
,
5071 dwarf2_per_objfile
->n_allocated_type_units
);
5072 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
5074 dwarf2_per_objfile
->n_type_units
= n_type_units
;
5076 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5077 struct signatured_type
);
5078 dwarf2_per_objfile
->all_type_units
[n_type_units
- 1] = sig_type
;
5079 sig_type
->signature
= sig
;
5080 sig_type
->per_cu
.is_debug_types
= 1;
5081 if (dwarf2_per_objfile
->using_index
)
5083 sig_type
->per_cu
.v
.quick
=
5084 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5085 struct dwarf2_per_cu_quick_data
);
5090 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
5093 gdb_assert (*slot
== NULL
);
5095 /* The rest of sig_type must be filled in by the caller. */
5099 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
5100 Fill in SIG_ENTRY with DWO_ENTRY. */
5103 fill_in_sig_entry_from_dwo_entry (struct objfile
*objfile
,
5104 struct signatured_type
*sig_entry
,
5105 struct dwo_unit
*dwo_entry
)
5107 /* Make sure we're not clobbering something we don't expect to. */
5108 gdb_assert (! sig_entry
->per_cu
.queued
);
5109 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
5110 if (dwarf2_per_objfile
->using_index
)
5112 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
5113 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
5116 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
5117 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
5118 gdb_assert (to_underlying (sig_entry
->type_offset_in_section
) == 0);
5119 gdb_assert (sig_entry
->type_unit_group
== NULL
);
5120 gdb_assert (sig_entry
->dwo_unit
== NULL
);
5122 sig_entry
->per_cu
.section
= dwo_entry
->section
;
5123 sig_entry
->per_cu
.sect_off
= dwo_entry
->sect_off
;
5124 sig_entry
->per_cu
.length
= dwo_entry
->length
;
5125 sig_entry
->per_cu
.reading_dwo_directly
= 1;
5126 sig_entry
->per_cu
.objfile
= objfile
;
5127 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
5128 sig_entry
->dwo_unit
= dwo_entry
;
5131 /* Subroutine of lookup_signatured_type.
5132 If we haven't read the TU yet, create the signatured_type data structure
5133 for a TU to be read in directly from a DWO file, bypassing the stub.
5134 This is the "Stay in DWO Optimization": When there is no DWP file and we're
5135 using .gdb_index, then when reading a CU we want to stay in the DWO file
5136 containing that CU. Otherwise we could end up reading several other DWO
5137 files (due to comdat folding) to process the transitive closure of all the
5138 mentioned TUs, and that can be slow. The current DWO file will have every
5139 type signature that it needs.
5140 We only do this for .gdb_index because in the psymtab case we already have
5141 to read all the DWOs to build the type unit groups. */
5143 static struct signatured_type
*
5144 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
5146 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5147 struct dwo_file
*dwo_file
;
5148 struct dwo_unit find_dwo_entry
, *dwo_entry
;
5149 struct signatured_type find_sig_entry
, *sig_entry
;
5152 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
5154 /* If TU skeletons have been removed then we may not have read in any
5156 if (dwarf2_per_objfile
->signatured_types
== NULL
)
5158 dwarf2_per_objfile
->signatured_types
5159 = allocate_signatured_type_table (objfile
);
5162 /* We only ever need to read in one copy of a signatured type.
5163 Use the global signatured_types array to do our own comdat-folding
5164 of types. If this is the first time we're reading this TU, and
5165 the TU has an entry in .gdb_index, replace the recorded data from
5166 .gdb_index with this TU. */
5168 find_sig_entry
.signature
= sig
;
5169 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
5170 &find_sig_entry
, INSERT
);
5171 sig_entry
= (struct signatured_type
*) *slot
;
5173 /* We can get here with the TU already read, *or* in the process of being
5174 read. Don't reassign the global entry to point to this DWO if that's
5175 the case. Also note that if the TU is already being read, it may not
5176 have come from a DWO, the program may be a mix of Fission-compiled
5177 code and non-Fission-compiled code. */
5179 /* Have we already tried to read this TU?
5180 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
5181 needn't exist in the global table yet). */
5182 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
5185 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
5186 dwo_unit of the TU itself. */
5187 dwo_file
= cu
->dwo_unit
->dwo_file
;
5189 /* Ok, this is the first time we're reading this TU. */
5190 if (dwo_file
->tus
== NULL
)
5192 find_dwo_entry
.signature
= sig
;
5193 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_entry
);
5194 if (dwo_entry
== NULL
)
5197 /* If the global table doesn't have an entry for this TU, add one. */
5198 if (sig_entry
== NULL
)
5199 sig_entry
= add_type_unit (sig
, slot
);
5201 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
5202 sig_entry
->per_cu
.tu_read
= 1;
5206 /* Subroutine of lookup_signatured_type.
5207 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
5208 then try the DWP file. If the TU stub (skeleton) has been removed then
5209 it won't be in .gdb_index. */
5211 static struct signatured_type
*
5212 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
5214 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5215 struct dwp_file
*dwp_file
= get_dwp_file ();
5216 struct dwo_unit
*dwo_entry
;
5217 struct signatured_type find_sig_entry
, *sig_entry
;
5220 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
5221 gdb_assert (dwp_file
!= NULL
);
5223 /* If TU skeletons have been removed then we may not have read in any
5225 if (dwarf2_per_objfile
->signatured_types
== NULL
)
5227 dwarf2_per_objfile
->signatured_types
5228 = allocate_signatured_type_table (objfile
);
5231 find_sig_entry
.signature
= sig
;
5232 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
5233 &find_sig_entry
, INSERT
);
5234 sig_entry
= (struct signatured_type
*) *slot
;
5236 /* Have we already tried to read this TU?
5237 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
5238 needn't exist in the global table yet). */
5239 if (sig_entry
!= NULL
)
5242 if (dwp_file
->tus
== NULL
)
5244 dwo_entry
= lookup_dwo_unit_in_dwp (dwp_file
, NULL
,
5245 sig
, 1 /* is_debug_types */);
5246 if (dwo_entry
== NULL
)
5249 sig_entry
= add_type_unit (sig
, slot
);
5250 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
5255 /* Lookup a signature based type for DW_FORM_ref_sig8.
5256 Returns NULL if signature SIG is not present in the table.
5257 It is up to the caller to complain about this. */
5259 static struct signatured_type
*
5260 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
5263 && dwarf2_per_objfile
->using_index
)
5265 /* We're in a DWO/DWP file, and we're using .gdb_index.
5266 These cases require special processing. */
5267 if (get_dwp_file () == NULL
)
5268 return lookup_dwo_signatured_type (cu
, sig
);
5270 return lookup_dwp_signatured_type (cu
, sig
);
5274 struct signatured_type find_entry
, *entry
;
5276 if (dwarf2_per_objfile
->signatured_types
== NULL
)
5278 find_entry
.signature
= sig
;
5279 entry
= ((struct signatured_type
*)
5280 htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
));
5285 /* Low level DIE reading support. */
5287 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
5290 init_cu_die_reader (struct die_reader_specs
*reader
,
5291 struct dwarf2_cu
*cu
,
5292 struct dwarf2_section_info
*section
,
5293 struct dwo_file
*dwo_file
)
5295 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
5296 reader
->abfd
= get_section_bfd_owner (section
);
5298 reader
->dwo_file
= dwo_file
;
5299 reader
->die_section
= section
;
5300 reader
->buffer
= section
->buffer
;
5301 reader
->buffer_end
= section
->buffer
+ section
->size
;
5302 reader
->comp_dir
= NULL
;
5305 /* Subroutine of init_cutu_and_read_dies to simplify it.
5306 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
5307 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
5310 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
5311 from it to the DIE in the DWO. If NULL we are skipping the stub.
5312 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
5313 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
5314 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
5315 STUB_COMP_DIR may be non-NULL.
5316 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
5317 are filled in with the info of the DIE from the DWO file.
5318 ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies
5319 provided an abbrev table to use.
5320 The result is non-zero if a valid (non-dummy) DIE was found. */
5323 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
5324 struct dwo_unit
*dwo_unit
,
5325 int abbrev_table_provided
,
5326 struct die_info
*stub_comp_unit_die
,
5327 const char *stub_comp_dir
,
5328 struct die_reader_specs
*result_reader
,
5329 const gdb_byte
**result_info_ptr
,
5330 struct die_info
**result_comp_unit_die
,
5331 int *result_has_children
)
5333 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5334 struct dwarf2_cu
*cu
= this_cu
->cu
;
5335 struct dwarf2_section_info
*section
;
5337 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5338 ULONGEST signature
; /* Or dwo_id. */
5339 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
5340 int i
,num_extra_attrs
;
5341 struct dwarf2_section_info
*dwo_abbrev_section
;
5342 struct attribute
*attr
;
5343 struct die_info
*comp_unit_die
;
5345 /* At most one of these may be provided. */
5346 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
5348 /* These attributes aren't processed until later:
5349 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
5350 DW_AT_comp_dir is used now, to find the DWO file, but it is also
5351 referenced later. However, these attributes are found in the stub
5352 which we won't have later. In order to not impose this complication
5353 on the rest of the code, we read them here and copy them to the
5362 if (stub_comp_unit_die
!= NULL
)
5364 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
5366 if (! this_cu
->is_debug_types
)
5367 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
5368 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
5369 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
5370 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
5371 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
5373 /* There should be a DW_AT_addr_base attribute here (if needed).
5374 We need the value before we can process DW_FORM_GNU_addr_index. */
5376 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
5378 cu
->addr_base
= DW_UNSND (attr
);
5380 /* There should be a DW_AT_ranges_base attribute here (if needed).
5381 We need the value before we can process DW_AT_ranges. */
5382 cu
->ranges_base
= 0;
5383 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
5385 cu
->ranges_base
= DW_UNSND (attr
);
5387 else if (stub_comp_dir
!= NULL
)
5389 /* Reconstruct the comp_dir attribute to simplify the code below. */
5390 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
5391 comp_dir
->name
= DW_AT_comp_dir
;
5392 comp_dir
->form
= DW_FORM_string
;
5393 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
5394 DW_STRING (comp_dir
) = stub_comp_dir
;
5397 /* Set up for reading the DWO CU/TU. */
5398 cu
->dwo_unit
= dwo_unit
;
5399 section
= dwo_unit
->section
;
5400 dwarf2_read_section (objfile
, section
);
5401 abfd
= get_section_bfd_owner (section
);
5402 begin_info_ptr
= info_ptr
= (section
->buffer
5403 + to_underlying (dwo_unit
->sect_off
));
5404 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
5405 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
);
5407 if (this_cu
->is_debug_types
)
5409 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
5411 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5413 info_ptr
, rcuh_kind::TYPE
);
5414 /* This is not an assert because it can be caused by bad debug info. */
5415 if (sig_type
->signature
!= cu
->header
.signature
)
5417 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
5418 " TU at offset 0x%x [in module %s]"),
5419 hex_string (sig_type
->signature
),
5420 hex_string (cu
->header
.signature
),
5421 to_underlying (dwo_unit
->sect_off
),
5422 bfd_get_filename (abfd
));
5424 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
5425 /* For DWOs coming from DWP files, we don't know the CU length
5426 nor the type's offset in the TU until now. */
5427 dwo_unit
->length
= get_cu_length (&cu
->header
);
5428 dwo_unit
->type_offset_in_tu
= cu
->header
.type_cu_offset_in_tu
;
5430 /* Establish the type offset that can be used to lookup the type.
5431 For DWO files, we don't know it until now. */
5432 sig_type
->type_offset_in_section
5433 = dwo_unit
->sect_off
+ to_underlying (dwo_unit
->type_offset_in_tu
);
5437 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5439 info_ptr
, rcuh_kind::COMPILE
);
5440 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
5441 /* For DWOs coming from DWP files, we don't know the CU length
5443 dwo_unit
->length
= get_cu_length (&cu
->header
);
5446 /* Replace the CU's original abbrev table with the DWO's.
5447 Reminder: We can't read the abbrev table until we've read the header. */
5448 if (abbrev_table_provided
)
5450 /* Don't free the provided abbrev table, the caller of
5451 init_cutu_and_read_dies owns it. */
5452 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5453 /* Ensure the DWO abbrev table gets freed. */
5454 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5458 dwarf2_free_abbrev_table (cu
);
5459 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5460 /* Leave any existing abbrev table cleanup as is. */
5463 /* Read in the die, but leave space to copy over the attributes
5464 from the stub. This has the benefit of simplifying the rest of
5465 the code - all the work to maintain the illusion of a single
5466 DW_TAG_{compile,type}_unit DIE is done here. */
5467 num_extra_attrs
= ((stmt_list
!= NULL
)
5471 + (comp_dir
!= NULL
));
5472 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
5473 result_has_children
, num_extra_attrs
);
5475 /* Copy over the attributes from the stub to the DIE we just read in. */
5476 comp_unit_die
= *result_comp_unit_die
;
5477 i
= comp_unit_die
->num_attrs
;
5478 if (stmt_list
!= NULL
)
5479 comp_unit_die
->attrs
[i
++] = *stmt_list
;
5481 comp_unit_die
->attrs
[i
++] = *low_pc
;
5482 if (high_pc
!= NULL
)
5483 comp_unit_die
->attrs
[i
++] = *high_pc
;
5485 comp_unit_die
->attrs
[i
++] = *ranges
;
5486 if (comp_dir
!= NULL
)
5487 comp_unit_die
->attrs
[i
++] = *comp_dir
;
5488 comp_unit_die
->num_attrs
+= num_extra_attrs
;
5490 if (dwarf_die_debug
)
5492 fprintf_unfiltered (gdb_stdlog
,
5493 "Read die from %s@0x%x of %s:\n",
5494 get_section_name (section
),
5495 (unsigned) (begin_info_ptr
- section
->buffer
),
5496 bfd_get_filename (abfd
));
5497 dump_die (comp_unit_die
, dwarf_die_debug
);
5500 /* Save the comp_dir attribute. If there is no DWP file then we'll read
5501 TUs by skipping the stub and going directly to the entry in the DWO file.
5502 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
5503 to get it via circuitous means. Blech. */
5504 if (comp_dir
!= NULL
)
5505 result_reader
->comp_dir
= DW_STRING (comp_dir
);
5507 /* Skip dummy compilation units. */
5508 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
5509 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5512 *result_info_ptr
= info_ptr
;
5516 /* Subroutine of init_cutu_and_read_dies to simplify it.
5517 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
5518 Returns NULL if the specified DWO unit cannot be found. */
5520 static struct dwo_unit
*
5521 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
5522 struct die_info
*comp_unit_die
)
5524 struct dwarf2_cu
*cu
= this_cu
->cu
;
5525 struct attribute
*attr
;
5527 struct dwo_unit
*dwo_unit
;
5528 const char *comp_dir
, *dwo_name
;
5530 gdb_assert (cu
!= NULL
);
5532 /* Yeah, we look dwo_name up again, but it simplifies the code. */
5533 dwo_name
= dwarf2_string_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5534 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
5536 if (this_cu
->is_debug_types
)
5538 struct signatured_type
*sig_type
;
5540 /* Since this_cu is the first member of struct signatured_type,
5541 we can go from a pointer to one to a pointer to the other. */
5542 sig_type
= (struct signatured_type
*) this_cu
;
5543 signature
= sig_type
->signature
;
5544 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
5548 struct attribute
*attr
;
5550 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
5552 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
5554 dwo_name
, objfile_name (this_cu
->objfile
));
5555 signature
= DW_UNSND (attr
);
5556 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
5563 /* Subroutine of init_cutu_and_read_dies to simplify it.
5564 See it for a description of the parameters.
5565 Read a TU directly from a DWO file, bypassing the stub.
5567 Note: This function could be a little bit simpler if we shared cleanups
5568 with our caller, init_cutu_and_read_dies. That's generally a fragile thing
5569 to do, so we keep this function self-contained. Or we could move this
5570 into our caller, but it's complex enough already. */
5573 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
5574 int use_existing_cu
, int keep
,
5575 die_reader_func_ftype
*die_reader_func
,
5578 struct dwarf2_cu
*cu
;
5579 struct signatured_type
*sig_type
;
5580 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5581 struct die_reader_specs reader
;
5582 const gdb_byte
*info_ptr
;
5583 struct die_info
*comp_unit_die
;
5586 /* Verify we can do the following downcast, and that we have the
5588 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
5589 sig_type
= (struct signatured_type
*) this_cu
;
5590 gdb_assert (sig_type
->dwo_unit
!= NULL
);
5592 cleanups
= make_cleanup (null_cleanup
, NULL
);
5594 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5596 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
5598 /* There's no need to do the rereading_dwo_cu handling that
5599 init_cutu_and_read_dies does since we don't read the stub. */
5603 /* If !use_existing_cu, this_cu->cu must be NULL. */
5604 gdb_assert (this_cu
->cu
== NULL
);
5605 cu
= XNEW (struct dwarf2_cu
);
5606 init_one_comp_unit (cu
, this_cu
);
5607 /* If an error occurs while loading, release our storage. */
5608 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5611 /* A future optimization, if needed, would be to use an existing
5612 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
5613 could share abbrev tables. */
5615 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
5616 0 /* abbrev_table_provided */,
5617 NULL
/* stub_comp_unit_die */,
5618 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
5620 &comp_unit_die
, &has_children
) == 0)
5623 do_cleanups (cleanups
);
5627 /* All the "real" work is done here. */
5628 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5630 /* This duplicates the code in init_cutu_and_read_dies,
5631 but the alternative is making the latter more complex.
5632 This function is only for the special case of using DWO files directly:
5633 no point in overly complicating the general case just to handle this. */
5634 if (free_cu_cleanup
!= NULL
)
5638 /* We've successfully allocated this compilation unit. Let our
5639 caller clean it up when finished with it. */
5640 discard_cleanups (free_cu_cleanup
);
5642 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5643 So we have to manually free the abbrev table. */
5644 dwarf2_free_abbrev_table (cu
);
5646 /* Link this CU into read_in_chain. */
5647 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5648 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5651 do_cleanups (free_cu_cleanup
);
5654 do_cleanups (cleanups
);
5657 /* Initialize a CU (or TU) and read its DIEs.
5658 If the CU defers to a DWO file, read the DWO file as well.
5660 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
5661 Otherwise the table specified in the comp unit header is read in and used.
5662 This is an optimization for when we already have the abbrev table.
5664 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
5665 Otherwise, a new CU is allocated with xmalloc.
5667 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
5668 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
5670 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5671 linker) then DIE_READER_FUNC will not get called. */
5674 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
5675 struct abbrev_table
*abbrev_table
,
5676 int use_existing_cu
, int keep
,
5677 die_reader_func_ftype
*die_reader_func
,
5680 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5681 struct dwarf2_section_info
*section
= this_cu
->section
;
5682 bfd
*abfd
= get_section_bfd_owner (section
);
5683 struct dwarf2_cu
*cu
;
5684 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5685 struct die_reader_specs reader
;
5686 struct die_info
*comp_unit_die
;
5688 struct attribute
*attr
;
5689 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5690 struct signatured_type
*sig_type
= NULL
;
5691 struct dwarf2_section_info
*abbrev_section
;
5692 /* Non-zero if CU currently points to a DWO file and we need to
5693 reread it. When this happens we need to reread the skeleton die
5694 before we can reread the DWO file (this only applies to CUs, not TUs). */
5695 int rereading_dwo_cu
= 0;
5697 if (dwarf_die_debug
)
5698 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5699 this_cu
->is_debug_types
? "type" : "comp",
5700 to_underlying (this_cu
->sect_off
));
5702 if (use_existing_cu
)
5705 /* If we're reading a TU directly from a DWO file, including a virtual DWO
5706 file (instead of going through the stub), short-circuit all of this. */
5707 if (this_cu
->reading_dwo_directly
)
5709 /* Narrow down the scope of possibilities to have to understand. */
5710 gdb_assert (this_cu
->is_debug_types
);
5711 gdb_assert (abbrev_table
== NULL
);
5712 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
, keep
,
5713 die_reader_func
, data
);
5717 cleanups
= make_cleanup (null_cleanup
, NULL
);
5719 /* This is cheap if the section is already read in. */
5720 dwarf2_read_section (objfile
, section
);
5722 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
5724 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
5726 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5729 /* If this CU is from a DWO file we need to start over, we need to
5730 refetch the attributes from the skeleton CU.
5731 This could be optimized by retrieving those attributes from when we
5732 were here the first time: the previous comp_unit_die was stored in
5733 comp_unit_obstack. But there's no data yet that we need this
5735 if (cu
->dwo_unit
!= NULL
)
5736 rereading_dwo_cu
= 1;
5740 /* If !use_existing_cu, this_cu->cu must be NULL. */
5741 gdb_assert (this_cu
->cu
== NULL
);
5742 cu
= XNEW (struct dwarf2_cu
);
5743 init_one_comp_unit (cu
, this_cu
);
5744 /* If an error occurs while loading, release our storage. */
5745 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5748 /* Get the header. */
5749 if (to_underlying (cu
->header
.first_die_cu_offset
) != 0 && !rereading_dwo_cu
)
5751 /* We already have the header, there's no need to read it in again. */
5752 info_ptr
+= to_underlying (cu
->header
.first_die_cu_offset
);
5756 if (this_cu
->is_debug_types
)
5758 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5759 abbrev_section
, info_ptr
,
5762 /* Since per_cu is the first member of struct signatured_type,
5763 we can go from a pointer to one to a pointer to the other. */
5764 sig_type
= (struct signatured_type
*) this_cu
;
5765 gdb_assert (sig_type
->signature
== cu
->header
.signature
);
5766 gdb_assert (sig_type
->type_offset_in_tu
5767 == cu
->header
.type_cu_offset_in_tu
);
5768 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
5770 /* LENGTH has not been set yet for type units if we're
5771 using .gdb_index. */
5772 this_cu
->length
= get_cu_length (&cu
->header
);
5774 /* Establish the type offset that can be used to lookup the type. */
5775 sig_type
->type_offset_in_section
=
5776 this_cu
->sect_off
+ to_underlying (sig_type
->type_offset_in_tu
);
5778 this_cu
->dwarf_version
= cu
->header
.version
;
5782 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5785 rcuh_kind::COMPILE
);
5787 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
5788 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
5789 this_cu
->dwarf_version
= cu
->header
.version
;
5793 /* Skip dummy compilation units. */
5794 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5795 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5797 do_cleanups (cleanups
);
5801 /* If we don't have them yet, read the abbrevs for this compilation unit.
5802 And if we need to read them now, make sure they're freed when we're
5803 done. Note that it's important that if the CU had an abbrev table
5804 on entry we don't free it when we're done: Somewhere up the call stack
5805 it may be in use. */
5806 if (abbrev_table
!= NULL
)
5808 gdb_assert (cu
->abbrev_table
== NULL
);
5809 gdb_assert (cu
->header
.abbrev_sect_off
== abbrev_table
->sect_off
);
5810 cu
->abbrev_table
= abbrev_table
;
5812 else if (cu
->abbrev_table
== NULL
)
5814 dwarf2_read_abbrevs (cu
, abbrev_section
);
5815 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5817 else if (rereading_dwo_cu
)
5819 dwarf2_free_abbrev_table (cu
);
5820 dwarf2_read_abbrevs (cu
, abbrev_section
);
5823 /* Read the top level CU/TU die. */
5824 init_cu_die_reader (&reader
, cu
, section
, NULL
);
5825 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5827 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
5829 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
5830 DWO CU, that this test will fail (the attribute will not be present). */
5831 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5834 struct dwo_unit
*dwo_unit
;
5835 struct die_info
*dwo_comp_unit_die
;
5839 complaint (&symfile_complaints
,
5840 _("compilation unit with DW_AT_GNU_dwo_name"
5841 " has children (offset 0x%x) [in module %s]"),
5842 to_underlying (this_cu
->sect_off
), bfd_get_filename (abfd
));
5844 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
);
5845 if (dwo_unit
!= NULL
)
5847 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
5848 abbrev_table
!= NULL
,
5849 comp_unit_die
, NULL
,
5851 &dwo_comp_unit_die
, &has_children
) == 0)
5854 do_cleanups (cleanups
);
5857 comp_unit_die
= dwo_comp_unit_die
;
5861 /* Yikes, we couldn't find the rest of the DIE, we only have
5862 the stub. A complaint has already been logged. There's
5863 not much more we can do except pass on the stub DIE to
5864 die_reader_func. We don't want to throw an error on bad
5869 /* All of the above is setup for this call. Yikes. */
5870 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5872 /* Done, clean up. */
5873 if (free_cu_cleanup
!= NULL
)
5877 /* We've successfully allocated this compilation unit. Let our
5878 caller clean it up when finished with it. */
5879 discard_cleanups (free_cu_cleanup
);
5881 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5882 So we have to manually free the abbrev table. */
5883 dwarf2_free_abbrev_table (cu
);
5885 /* Link this CU into read_in_chain. */
5886 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5887 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5890 do_cleanups (free_cu_cleanup
);
5893 do_cleanups (cleanups
);
5896 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present.
5897 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed
5898 to have already done the lookup to find the DWO file).
5900 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
5901 THIS_CU->is_debug_types, but nothing else.
5903 We fill in THIS_CU->length.
5905 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5906 linker) then DIE_READER_FUNC will not get called.
5908 THIS_CU->cu is always freed when done.
5909 This is done in order to not leave THIS_CU->cu in a state where we have
5910 to care whether it refers to the "main" CU or the DWO CU. */
5913 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
5914 struct dwo_file
*dwo_file
,
5915 die_reader_func_ftype
*die_reader_func
,
5918 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5919 struct dwarf2_section_info
*section
= this_cu
->section
;
5920 bfd
*abfd
= get_section_bfd_owner (section
);
5921 struct dwarf2_section_info
*abbrev_section
;
5922 struct dwarf2_cu cu
;
5923 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5924 struct die_reader_specs reader
;
5925 struct cleanup
*cleanups
;
5926 struct die_info
*comp_unit_die
;
5929 if (dwarf_die_debug
)
5930 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5931 this_cu
->is_debug_types
? "type" : "comp",
5932 to_underlying (this_cu
->sect_off
));
5934 gdb_assert (this_cu
->cu
== NULL
);
5936 abbrev_section
= (dwo_file
!= NULL
5937 ? &dwo_file
->sections
.abbrev
5938 : get_abbrev_section_for_cu (this_cu
));
5940 /* This is cheap if the section is already read in. */
5941 dwarf2_read_section (objfile
, section
);
5943 init_one_comp_unit (&cu
, this_cu
);
5945 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
5947 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
5948 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, section
,
5949 abbrev_section
, info_ptr
,
5950 (this_cu
->is_debug_types
5952 : rcuh_kind::COMPILE
));
5954 this_cu
->length
= get_cu_length (&cu
.header
);
5956 /* Skip dummy compilation units. */
5957 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5958 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5960 do_cleanups (cleanups
);
5964 dwarf2_read_abbrevs (&cu
, abbrev_section
);
5965 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
5967 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
);
5968 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5970 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5972 do_cleanups (cleanups
);
5975 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
5976 does not lookup the specified DWO file.
5977 This cannot be used to read DWO files.
5979 THIS_CU->cu is always freed when done.
5980 This is done in order to not leave THIS_CU->cu in a state where we have
5981 to care whether it refers to the "main" CU or the DWO CU.
5982 We can revisit this if the data shows there's a performance issue. */
5985 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
5986 die_reader_func_ftype
*die_reader_func
,
5989 init_cutu_and_read_dies_no_follow (this_cu
, NULL
, die_reader_func
, data
);
5992 /* Type Unit Groups.
5994 Type Unit Groups are a way to collapse the set of all TUs (type units) into
5995 a more manageable set. The grouping is done by DW_AT_stmt_list entry
5996 so that all types coming from the same compilation (.o file) are grouped
5997 together. A future step could be to put the types in the same symtab as
5998 the CU the types ultimately came from. */
6001 hash_type_unit_group (const void *item
)
6003 const struct type_unit_group
*tu_group
6004 = (const struct type_unit_group
*) item
;
6006 return hash_stmt_list_entry (&tu_group
->hash
);
6010 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
6012 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
6013 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
6015 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
6018 /* Allocate a hash table for type unit groups. */
6021 allocate_type_unit_groups_table (void)
6023 return htab_create_alloc_ex (3,
6024 hash_type_unit_group
,
6027 &dwarf2_per_objfile
->objfile
->objfile_obstack
,
6028 hashtab_obstack_allocate
,
6029 dummy_obstack_deallocate
);
6032 /* Type units that don't have DW_AT_stmt_list are grouped into their own
6033 partial symtabs. We combine several TUs per psymtab to not let the size
6034 of any one psymtab grow too big. */
6035 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
6036 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
6038 /* Helper routine for get_type_unit_group.
6039 Create the type_unit_group object used to hold one or more TUs. */
6041 static struct type_unit_group
*
6042 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
6044 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6045 struct dwarf2_per_cu_data
*per_cu
;
6046 struct type_unit_group
*tu_group
;
6048 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6049 struct type_unit_group
);
6050 per_cu
= &tu_group
->per_cu
;
6051 per_cu
->objfile
= objfile
;
6053 if (dwarf2_per_objfile
->using_index
)
6055 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6056 struct dwarf2_per_cu_quick_data
);
6060 unsigned int line_offset
= to_underlying (line_offset_struct
);
6061 struct partial_symtab
*pst
;
6064 /* Give the symtab a useful name for debug purposes. */
6065 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
6066 name
= xstrprintf ("<type_units_%d>",
6067 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
6069 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
6071 pst
= create_partial_symtab (per_cu
, name
);
6077 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
6078 tu_group
->hash
.line_sect_off
= line_offset_struct
;
6083 /* Look up the type_unit_group for type unit CU, and create it if necessary.
6084 STMT_LIST is a DW_AT_stmt_list attribute. */
6086 static struct type_unit_group
*
6087 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
6089 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6090 struct type_unit_group
*tu_group
;
6092 unsigned int line_offset
;
6093 struct type_unit_group type_unit_group_for_lookup
;
6095 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
6097 dwarf2_per_objfile
->type_unit_groups
=
6098 allocate_type_unit_groups_table ();
6101 /* Do we need to create a new group, or can we use an existing one? */
6105 line_offset
= DW_UNSND (stmt_list
);
6106 ++tu_stats
->nr_symtab_sharers
;
6110 /* Ugh, no stmt_list. Rare, but we have to handle it.
6111 We can do various things here like create one group per TU or
6112 spread them over multiple groups to split up the expansion work.
6113 To avoid worst case scenarios (too many groups or too large groups)
6114 we, umm, group them in bunches. */
6115 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
6116 | (tu_stats
->nr_stmt_less_type_units
6117 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
6118 ++tu_stats
->nr_stmt_less_type_units
;
6121 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
6122 type_unit_group_for_lookup
.hash
.line_sect_off
= (sect_offset
) line_offset
;
6123 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
6124 &type_unit_group_for_lookup
, INSERT
);
6127 tu_group
= (struct type_unit_group
*) *slot
;
6128 gdb_assert (tu_group
!= NULL
);
6132 sect_offset line_offset_struct
= (sect_offset
) line_offset
;
6133 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
6135 ++tu_stats
->nr_symtabs
;
6141 /* Partial symbol tables. */
6143 /* Create a psymtab named NAME and assign it to PER_CU.
6145 The caller must fill in the following details:
6146 dirname, textlow, texthigh. */
6148 static struct partial_symtab
*
6149 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
6151 struct objfile
*objfile
= per_cu
->objfile
;
6152 struct partial_symtab
*pst
;
6154 pst
= start_psymtab_common (objfile
, name
, 0,
6155 objfile
->global_psymbols
.next
,
6156 objfile
->static_psymbols
.next
);
6158 pst
->psymtabs_addrmap_supported
= 1;
6160 /* This is the glue that links PST into GDB's symbol API. */
6161 pst
->read_symtab_private
= per_cu
;
6162 pst
->read_symtab
= dwarf2_read_symtab
;
6163 per_cu
->v
.psymtab
= pst
;
6168 /* The DATA object passed to process_psymtab_comp_unit_reader has this
6171 struct process_psymtab_comp_unit_data
6173 /* True if we are reading a DW_TAG_partial_unit. */
6175 int want_partial_unit
;
6177 /* The "pretend" language that is used if the CU doesn't declare a
6180 enum language pretend_language
;
6183 /* die_reader_func for process_psymtab_comp_unit. */
6186 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
6187 const gdb_byte
*info_ptr
,
6188 struct die_info
*comp_unit_die
,
6192 struct dwarf2_cu
*cu
= reader
->cu
;
6193 struct objfile
*objfile
= cu
->objfile
;
6194 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6195 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
6197 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
6198 struct partial_symtab
*pst
;
6199 enum pc_bounds_kind cu_bounds_kind
;
6200 const char *filename
;
6201 struct process_psymtab_comp_unit_data
*info
6202 = (struct process_psymtab_comp_unit_data
*) data
;
6204 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !info
->want_partial_unit
)
6207 gdb_assert (! per_cu
->is_debug_types
);
6209 prepare_one_comp_unit (cu
, comp_unit_die
, info
->pretend_language
);
6211 cu
->list_in_scope
= &file_symbols
;
6213 /* Allocate a new partial symbol table structure. */
6214 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
6215 if (filename
== NULL
)
6218 pst
= create_partial_symtab (per_cu
, filename
);
6220 /* This must be done before calling dwarf2_build_include_psymtabs. */
6221 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
6223 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6225 dwarf2_find_base_address (comp_unit_die
, cu
);
6227 /* Possibly set the default values of LOWPC and HIGHPC from
6229 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
6230 &best_highpc
, cu
, pst
);
6231 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
6232 /* Store the contiguous range if it is not empty; it can be empty for
6233 CUs with no code. */
6234 addrmap_set_empty (objfile
->psymtabs_addrmap
,
6235 gdbarch_adjust_dwarf2_addr (gdbarch
,
6236 best_lowpc
+ baseaddr
),
6237 gdbarch_adjust_dwarf2_addr (gdbarch
,
6238 best_highpc
+ baseaddr
) - 1,
6241 /* Check if comp unit has_children.
6242 If so, read the rest of the partial symbols from this comp unit.
6243 If not, there's no more debug_info for this comp unit. */
6246 struct partial_die_info
*first_die
;
6247 CORE_ADDR lowpc
, highpc
;
6249 lowpc
= ((CORE_ADDR
) -1);
6250 highpc
= ((CORE_ADDR
) 0);
6252 first_die
= load_partial_dies (reader
, info_ptr
, 1);
6254 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
6255 cu_bounds_kind
<= PC_BOUNDS_INVALID
, cu
);
6257 /* If we didn't find a lowpc, set it to highpc to avoid
6258 complaints from `maint check'. */
6259 if (lowpc
== ((CORE_ADDR
) -1))
6262 /* If the compilation unit didn't have an explicit address range,
6263 then use the information extracted from its child dies. */
6264 if (cu_bounds_kind
<= PC_BOUNDS_INVALID
)
6267 best_highpc
= highpc
;
6270 pst
->textlow
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
);
6271 pst
->texthigh
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
);
6273 end_psymtab_common (objfile
, pst
);
6275 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
6278 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
6279 struct dwarf2_per_cu_data
*iter
;
6281 /* Fill in 'dependencies' here; we fill in 'users' in a
6283 pst
->number_of_dependencies
= len
;
6285 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
6287 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
6290 pst
->dependencies
[i
] = iter
->v
.psymtab
;
6292 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
6295 /* Get the list of files included in the current compilation unit,
6296 and build a psymtab for each of them. */
6297 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
6299 if (dwarf_read_debug
)
6301 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6303 fprintf_unfiltered (gdb_stdlog
,
6304 "Psymtab for %s unit @0x%x: %s - %s"
6305 ", %d global, %d static syms\n",
6306 per_cu
->is_debug_types
? "type" : "comp",
6307 to_underlying (per_cu
->sect_off
),
6308 paddress (gdbarch
, pst
->textlow
),
6309 paddress (gdbarch
, pst
->texthigh
),
6310 pst
->n_global_syms
, pst
->n_static_syms
);
6314 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6315 Process compilation unit THIS_CU for a psymtab. */
6318 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
6319 int want_partial_unit
,
6320 enum language pretend_language
)
6322 /* If this compilation unit was already read in, free the
6323 cached copy in order to read it in again. This is
6324 necessary because we skipped some symbols when we first
6325 read in the compilation unit (see load_partial_dies).
6326 This problem could be avoided, but the benefit is unclear. */
6327 if (this_cu
->cu
!= NULL
)
6328 free_one_cached_comp_unit (this_cu
);
6330 if (this_cu
->is_debug_types
)
6331 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0, build_type_psymtabs_reader
,
6335 process_psymtab_comp_unit_data info
;
6336 info
.want_partial_unit
= want_partial_unit
;
6337 info
.pretend_language
= pretend_language
;
6338 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0,
6339 process_psymtab_comp_unit_reader
, &info
);
6342 /* Age out any secondary CUs. */
6343 age_cached_comp_units ();
6346 /* Reader function for build_type_psymtabs. */
6349 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
6350 const gdb_byte
*info_ptr
,
6351 struct die_info
*type_unit_die
,
6355 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6356 struct dwarf2_cu
*cu
= reader
->cu
;
6357 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
6358 struct signatured_type
*sig_type
;
6359 struct type_unit_group
*tu_group
;
6360 struct attribute
*attr
;
6361 struct partial_die_info
*first_die
;
6362 CORE_ADDR lowpc
, highpc
;
6363 struct partial_symtab
*pst
;
6365 gdb_assert (data
== NULL
);
6366 gdb_assert (per_cu
->is_debug_types
);
6367 sig_type
= (struct signatured_type
*) per_cu
;
6372 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
6373 tu_group
= get_type_unit_group (cu
, attr
);
6375 VEC_safe_push (sig_type_ptr
, tu_group
->tus
, sig_type
);
6377 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
6378 cu
->list_in_scope
= &file_symbols
;
6379 pst
= create_partial_symtab (per_cu
, "");
6382 first_die
= load_partial_dies (reader
, info_ptr
, 1);
6384 lowpc
= (CORE_ADDR
) -1;
6385 highpc
= (CORE_ADDR
) 0;
6386 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
6388 end_psymtab_common (objfile
, pst
);
6391 /* Struct used to sort TUs by their abbreviation table offset. */
6393 struct tu_abbrev_offset
6395 struct signatured_type
*sig_type
;
6396 sect_offset abbrev_offset
;
6399 /* Helper routine for build_type_psymtabs_1, passed to qsort. */
6402 sort_tu_by_abbrev_offset (const void *ap
, const void *bp
)
6404 const struct tu_abbrev_offset
* const *a
6405 = (const struct tu_abbrev_offset
* const*) ap
;
6406 const struct tu_abbrev_offset
* const *b
6407 = (const struct tu_abbrev_offset
* const*) bp
;
6408 sect_offset aoff
= (*a
)->abbrev_offset
;
6409 sect_offset boff
= (*b
)->abbrev_offset
;
6411 return (aoff
> boff
) - (aoff
< boff
);
6414 /* Efficiently read all the type units.
6415 This does the bulk of the work for build_type_psymtabs.
6417 The efficiency is because we sort TUs by the abbrev table they use and
6418 only read each abbrev table once. In one program there are 200K TUs
6419 sharing 8K abbrev tables.
6421 The main purpose of this function is to support building the
6422 dwarf2_per_objfile->type_unit_groups table.
6423 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
6424 can collapse the search space by grouping them by stmt_list.
6425 The savings can be significant, in the same program from above the 200K TUs
6426 share 8K stmt_list tables.
6428 FUNC is expected to call get_type_unit_group, which will create the
6429 struct type_unit_group if necessary and add it to
6430 dwarf2_per_objfile->type_unit_groups. */
6433 build_type_psymtabs_1 (void)
6435 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6436 struct cleanup
*cleanups
;
6437 struct abbrev_table
*abbrev_table
;
6438 sect_offset abbrev_offset
;
6439 struct tu_abbrev_offset
*sorted_by_abbrev
;
6442 /* It's up to the caller to not call us multiple times. */
6443 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
6445 if (dwarf2_per_objfile
->n_type_units
== 0)
6448 /* TUs typically share abbrev tables, and there can be way more TUs than
6449 abbrev tables. Sort by abbrev table to reduce the number of times we
6450 read each abbrev table in.
6451 Alternatives are to punt or to maintain a cache of abbrev tables.
6452 This is simpler and efficient enough for now.
6454 Later we group TUs by their DW_AT_stmt_list value (as this defines the
6455 symtab to use). Typically TUs with the same abbrev offset have the same
6456 stmt_list value too so in practice this should work well.
6458 The basic algorithm here is:
6460 sort TUs by abbrev table
6461 for each TU with same abbrev table:
6462 read abbrev table if first user
6463 read TU top level DIE
6464 [IWBN if DWO skeletons had DW_AT_stmt_list]
6467 if (dwarf_read_debug
)
6468 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
6470 /* Sort in a separate table to maintain the order of all_type_units
6471 for .gdb_index: TU indices directly index all_type_units. */
6472 sorted_by_abbrev
= XNEWVEC (struct tu_abbrev_offset
,
6473 dwarf2_per_objfile
->n_type_units
);
6474 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6476 struct signatured_type
*sig_type
= dwarf2_per_objfile
->all_type_units
[i
];
6478 sorted_by_abbrev
[i
].sig_type
= sig_type
;
6479 sorted_by_abbrev
[i
].abbrev_offset
=
6480 read_abbrev_offset (sig_type
->per_cu
.section
,
6481 sig_type
->per_cu
.sect_off
);
6483 cleanups
= make_cleanup (xfree
, sorted_by_abbrev
);
6484 qsort (sorted_by_abbrev
, dwarf2_per_objfile
->n_type_units
,
6485 sizeof (struct tu_abbrev_offset
), sort_tu_by_abbrev_offset
);
6487 abbrev_offset
= (sect_offset
) ~(unsigned) 0;
6488 abbrev_table
= NULL
;
6489 make_cleanup (abbrev_table_free_cleanup
, &abbrev_table
);
6491 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6493 const struct tu_abbrev_offset
*tu
= &sorted_by_abbrev
[i
];
6495 /* Switch to the next abbrev table if necessary. */
6496 if (abbrev_table
== NULL
6497 || tu
->abbrev_offset
!= abbrev_offset
)
6499 if (abbrev_table
!= NULL
)
6501 abbrev_table_free (abbrev_table
);
6502 /* Reset to NULL in case abbrev_table_read_table throws
6503 an error: abbrev_table_free_cleanup will get called. */
6504 abbrev_table
= NULL
;
6506 abbrev_offset
= tu
->abbrev_offset
;
6508 abbrev_table_read_table (&dwarf2_per_objfile
->abbrev
,
6510 ++tu_stats
->nr_uniq_abbrev_tables
;
6513 init_cutu_and_read_dies (&tu
->sig_type
->per_cu
, abbrev_table
, 0, 0,
6514 build_type_psymtabs_reader
, NULL
);
6517 do_cleanups (cleanups
);
6520 /* Print collected type unit statistics. */
6523 print_tu_stats (void)
6525 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6527 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
6528 fprintf_unfiltered (gdb_stdlog
, " %d TUs\n",
6529 dwarf2_per_objfile
->n_type_units
);
6530 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
6531 tu_stats
->nr_uniq_abbrev_tables
);
6532 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
6533 tu_stats
->nr_symtabs
);
6534 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
6535 tu_stats
->nr_symtab_sharers
);
6536 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
6537 tu_stats
->nr_stmt_less_type_units
);
6538 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
6539 tu_stats
->nr_all_type_units_reallocs
);
6542 /* Traversal function for build_type_psymtabs. */
6545 build_type_psymtab_dependencies (void **slot
, void *info
)
6547 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6548 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
6549 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
6550 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6551 int len
= VEC_length (sig_type_ptr
, tu_group
->tus
);
6552 struct signatured_type
*iter
;
6555 gdb_assert (len
> 0);
6556 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
6558 pst
->number_of_dependencies
= len
;
6560 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
6562 VEC_iterate (sig_type_ptr
, tu_group
->tus
, i
, iter
);
6565 gdb_assert (iter
->per_cu
.is_debug_types
);
6566 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
6567 iter
->type_unit_group
= tu_group
;
6570 VEC_free (sig_type_ptr
, tu_group
->tus
);
6575 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6576 Build partial symbol tables for the .debug_types comp-units. */
6579 build_type_psymtabs (struct objfile
*objfile
)
6581 if (! create_all_type_units (objfile
))
6584 build_type_psymtabs_1 ();
6587 /* Traversal function for process_skeletonless_type_unit.
6588 Read a TU in a DWO file and build partial symbols for it. */
6591 process_skeletonless_type_unit (void **slot
, void *info
)
6593 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
6594 struct objfile
*objfile
= (struct objfile
*) info
;
6595 struct signatured_type find_entry
, *entry
;
6597 /* If this TU doesn't exist in the global table, add it and read it in. */
6599 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6601 dwarf2_per_objfile
->signatured_types
6602 = allocate_signatured_type_table (objfile
);
6605 find_entry
.signature
= dwo_unit
->signature
;
6606 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
, &find_entry
,
6608 /* If we've already seen this type there's nothing to do. What's happening
6609 is we're doing our own version of comdat-folding here. */
6613 /* This does the job that create_all_type_units would have done for
6615 entry
= add_type_unit (dwo_unit
->signature
, slot
);
6616 fill_in_sig_entry_from_dwo_entry (objfile
, entry
, dwo_unit
);
6619 /* This does the job that build_type_psymtabs_1 would have done. */
6620 init_cutu_and_read_dies (&entry
->per_cu
, NULL
, 0, 0,
6621 build_type_psymtabs_reader
, NULL
);
6626 /* Traversal function for process_skeletonless_type_units. */
6629 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
6631 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
6633 if (dwo_file
->tus
!= NULL
)
6635 htab_traverse_noresize (dwo_file
->tus
,
6636 process_skeletonless_type_unit
, info
);
6642 /* Scan all TUs of DWO files, verifying we've processed them.
6643 This is needed in case a TU was emitted without its skeleton.
6644 Note: This can't be done until we know what all the DWO files are. */
6647 process_skeletonless_type_units (struct objfile
*objfile
)
6649 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
6650 if (get_dwp_file () == NULL
6651 && dwarf2_per_objfile
->dwo_files
!= NULL
)
6653 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
,
6654 process_dwo_file_for_skeletonless_type_units
,
6659 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
6662 psymtabs_addrmap_cleanup (void *o
)
6664 struct objfile
*objfile
= (struct objfile
*) o
;
6666 objfile
->psymtabs_addrmap
= NULL
;
6669 /* Compute the 'user' field for each psymtab in OBJFILE. */
6672 set_partial_user (struct objfile
*objfile
)
6676 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6678 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6679 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6685 for (j
= 0; j
< pst
->number_of_dependencies
; ++j
)
6687 /* Set the 'user' field only if it is not already set. */
6688 if (pst
->dependencies
[j
]->user
== NULL
)
6689 pst
->dependencies
[j
]->user
= pst
;
6694 /* Build the partial symbol table by doing a quick pass through the
6695 .debug_info and .debug_abbrev sections. */
6698 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
6700 struct cleanup
*back_to
, *addrmap_cleanup
;
6703 if (dwarf_read_debug
)
6705 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
6706 objfile_name (objfile
));
6709 dwarf2_per_objfile
->reading_partial_symbols
= 1;
6711 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
6713 /* Any cached compilation units will be linked by the per-objfile
6714 read_in_chain. Make sure to free them when we're done. */
6715 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
6717 build_type_psymtabs (objfile
);
6719 create_all_comp_units (objfile
);
6721 /* Create a temporary address map on a temporary obstack. We later
6722 copy this to the final obstack. */
6723 auto_obstack temp_obstack
;
6724 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
6725 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
6727 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6729 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6731 process_psymtab_comp_unit (per_cu
, 0, language_minimal
);
6734 /* This has to wait until we read the CUs, we need the list of DWOs. */
6735 process_skeletonless_type_units (objfile
);
6737 /* Now that all TUs have been processed we can fill in the dependencies. */
6738 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
6740 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
6741 build_type_psymtab_dependencies
, NULL
);
6744 if (dwarf_read_debug
)
6747 set_partial_user (objfile
);
6749 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
6750 &objfile
->objfile_obstack
);
6751 discard_cleanups (addrmap_cleanup
);
6753 do_cleanups (back_to
);
6755 if (dwarf_read_debug
)
6756 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
6757 objfile_name (objfile
));
6760 /* die_reader_func for load_partial_comp_unit. */
6763 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
6764 const gdb_byte
*info_ptr
,
6765 struct die_info
*comp_unit_die
,
6769 struct dwarf2_cu
*cu
= reader
->cu
;
6771 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
6773 /* Check if comp unit has_children.
6774 If so, read the rest of the partial symbols from this comp unit.
6775 If not, there's no more debug_info for this comp unit. */
6777 load_partial_dies (reader
, info_ptr
, 0);
6780 /* Load the partial DIEs for a secondary CU into memory.
6781 This is also used when rereading a primary CU with load_all_dies. */
6784 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
6786 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
6787 load_partial_comp_unit_reader
, NULL
);
6791 read_comp_units_from_section (struct objfile
*objfile
,
6792 struct dwarf2_section_info
*section
,
6793 struct dwarf2_section_info
*abbrev_section
,
6794 unsigned int is_dwz
,
6797 struct dwarf2_per_cu_data
***all_comp_units
)
6799 const gdb_byte
*info_ptr
;
6800 bfd
*abfd
= get_section_bfd_owner (section
);
6802 if (dwarf_read_debug
)
6803 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
6804 get_section_name (section
),
6805 get_section_file_name (section
));
6807 dwarf2_read_section (objfile
, section
);
6809 info_ptr
= section
->buffer
;
6811 while (info_ptr
< section
->buffer
+ section
->size
)
6813 struct dwarf2_per_cu_data
*this_cu
;
6815 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
->buffer
);
6817 comp_unit_head cu_header
;
6818 read_and_check_comp_unit_head (&cu_header
, section
, abbrev_section
,
6819 info_ptr
, rcuh_kind::COMPILE
);
6821 /* Save the compilation unit for later lookup. */
6822 if (cu_header
.unit_type
!= DW_UT_type
)
6824 this_cu
= XOBNEW (&objfile
->objfile_obstack
,
6825 struct dwarf2_per_cu_data
);
6826 memset (this_cu
, 0, sizeof (*this_cu
));
6830 auto sig_type
= XOBNEW (&objfile
->objfile_obstack
,
6831 struct signatured_type
);
6832 memset (sig_type
, 0, sizeof (*sig_type
));
6833 sig_type
->signature
= cu_header
.signature
;
6834 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
6835 this_cu
= &sig_type
->per_cu
;
6837 this_cu
->is_debug_types
= (cu_header
.unit_type
== DW_UT_type
);
6838 this_cu
->sect_off
= sect_off
;
6839 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
6840 this_cu
->is_dwz
= is_dwz
;
6841 this_cu
->objfile
= objfile
;
6842 this_cu
->section
= section
;
6844 if (*n_comp_units
== *n_allocated
)
6847 *all_comp_units
= XRESIZEVEC (struct dwarf2_per_cu_data
*,
6848 *all_comp_units
, *n_allocated
);
6850 (*all_comp_units
)[*n_comp_units
] = this_cu
;
6853 info_ptr
= info_ptr
+ this_cu
->length
;
6857 /* Create a list of all compilation units in OBJFILE.
6858 This is only done for -readnow and building partial symtabs. */
6861 create_all_comp_units (struct objfile
*objfile
)
6865 struct dwarf2_per_cu_data
**all_comp_units
;
6866 struct dwz_file
*dwz
;
6870 all_comp_units
= XNEWVEC (struct dwarf2_per_cu_data
*, n_allocated
);
6872 read_comp_units_from_section (objfile
, &dwarf2_per_objfile
->info
,
6873 &dwarf2_per_objfile
->abbrev
, 0,
6874 &n_allocated
, &n_comp_units
, &all_comp_units
);
6876 dwz
= dwarf2_get_dwz_file ();
6878 read_comp_units_from_section (objfile
, &dwz
->info
, &dwz
->abbrev
, 1,
6879 &n_allocated
, &n_comp_units
,
6882 dwarf2_per_objfile
->all_comp_units
= XOBNEWVEC (&objfile
->objfile_obstack
,
6883 struct dwarf2_per_cu_data
*,
6885 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
6886 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
6887 xfree (all_comp_units
);
6888 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
6891 /* Process all loaded DIEs for compilation unit CU, starting at
6892 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
6893 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
6894 DW_AT_ranges). See the comments of add_partial_subprogram on how
6895 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
6898 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
6899 CORE_ADDR
*highpc
, int set_addrmap
,
6900 struct dwarf2_cu
*cu
)
6902 struct partial_die_info
*pdi
;
6904 /* Now, march along the PDI's, descending into ones which have
6905 interesting children but skipping the children of the other ones,
6906 until we reach the end of the compilation unit. */
6912 fixup_partial_die (pdi
, cu
);
6914 /* Anonymous namespaces or modules have no name but have interesting
6915 children, so we need to look at them. Ditto for anonymous
6918 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
6919 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
6920 || pdi
->tag
== DW_TAG_imported_unit
)
6924 case DW_TAG_subprogram
:
6925 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6927 case DW_TAG_constant
:
6928 case DW_TAG_variable
:
6929 case DW_TAG_typedef
:
6930 case DW_TAG_union_type
:
6931 if (!pdi
->is_declaration
)
6933 add_partial_symbol (pdi
, cu
);
6936 case DW_TAG_class_type
:
6937 case DW_TAG_interface_type
:
6938 case DW_TAG_structure_type
:
6939 if (!pdi
->is_declaration
)
6941 add_partial_symbol (pdi
, cu
);
6943 if (cu
->language
== language_rust
&& pdi
->has_children
)
6944 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
6947 case DW_TAG_enumeration_type
:
6948 if (!pdi
->is_declaration
)
6949 add_partial_enumeration (pdi
, cu
);
6951 case DW_TAG_base_type
:
6952 case DW_TAG_subrange_type
:
6953 /* File scope base type definitions are added to the partial
6955 add_partial_symbol (pdi
, cu
);
6957 case DW_TAG_namespace
:
6958 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6961 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6963 case DW_TAG_imported_unit
:
6965 struct dwarf2_per_cu_data
*per_cu
;
6967 /* For now we don't handle imported units in type units. */
6968 if (cu
->per_cu
->is_debug_types
)
6970 error (_("Dwarf Error: DW_TAG_imported_unit is not"
6971 " supported in type units [in module %s]"),
6972 objfile_name (cu
->objfile
));
6975 per_cu
= dwarf2_find_containing_comp_unit (pdi
->d
.sect_off
,
6979 /* Go read the partial unit, if needed. */
6980 if (per_cu
->v
.psymtab
== NULL
)
6981 process_psymtab_comp_unit (per_cu
, 1, cu
->language
);
6983 VEC_safe_push (dwarf2_per_cu_ptr
,
6984 cu
->per_cu
->imported_symtabs
, per_cu
);
6987 case DW_TAG_imported_declaration
:
6988 add_partial_symbol (pdi
, cu
);
6995 /* If the die has a sibling, skip to the sibling. */
6997 pdi
= pdi
->die_sibling
;
7001 /* Functions used to compute the fully scoped name of a partial DIE.
7003 Normally, this is simple. For C++, the parent DIE's fully scoped
7004 name is concatenated with "::" and the partial DIE's name.
7005 Enumerators are an exception; they use the scope of their parent
7006 enumeration type, i.e. the name of the enumeration type is not
7007 prepended to the enumerator.
7009 There are two complexities. One is DW_AT_specification; in this
7010 case "parent" means the parent of the target of the specification,
7011 instead of the direct parent of the DIE. The other is compilers
7012 which do not emit DW_TAG_namespace; in this case we try to guess
7013 the fully qualified name of structure types from their members'
7014 linkage names. This must be done using the DIE's children rather
7015 than the children of any DW_AT_specification target. We only need
7016 to do this for structures at the top level, i.e. if the target of
7017 any DW_AT_specification (if any; otherwise the DIE itself) does not
7020 /* Compute the scope prefix associated with PDI's parent, in
7021 compilation unit CU. The result will be allocated on CU's
7022 comp_unit_obstack, or a copy of the already allocated PDI->NAME
7023 field. NULL is returned if no prefix is necessary. */
7025 partial_die_parent_scope (struct partial_die_info
*pdi
,
7026 struct dwarf2_cu
*cu
)
7028 const char *grandparent_scope
;
7029 struct partial_die_info
*parent
, *real_pdi
;
7031 /* We need to look at our parent DIE; if we have a DW_AT_specification,
7032 then this means the parent of the specification DIE. */
7035 while (real_pdi
->has_specification
)
7036 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
7037 real_pdi
->spec_is_dwz
, cu
);
7039 parent
= real_pdi
->die_parent
;
7043 if (parent
->scope_set
)
7044 return parent
->scope
;
7046 fixup_partial_die (parent
, cu
);
7048 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
7050 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
7051 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
7052 Work around this problem here. */
7053 if (cu
->language
== language_cplus
7054 && parent
->tag
== DW_TAG_namespace
7055 && strcmp (parent
->name
, "::") == 0
7056 && grandparent_scope
== NULL
)
7058 parent
->scope
= NULL
;
7059 parent
->scope_set
= 1;
7063 if (pdi
->tag
== DW_TAG_enumerator
)
7064 /* Enumerators should not get the name of the enumeration as a prefix. */
7065 parent
->scope
= grandparent_scope
;
7066 else if (parent
->tag
== DW_TAG_namespace
7067 || parent
->tag
== DW_TAG_module
7068 || parent
->tag
== DW_TAG_structure_type
7069 || parent
->tag
== DW_TAG_class_type
7070 || parent
->tag
== DW_TAG_interface_type
7071 || parent
->tag
== DW_TAG_union_type
7072 || parent
->tag
== DW_TAG_enumeration_type
)
7074 if (grandparent_scope
== NULL
)
7075 parent
->scope
= parent
->name
;
7077 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
7079 parent
->name
, 0, cu
);
7083 /* FIXME drow/2004-04-01: What should we be doing with
7084 function-local names? For partial symbols, we should probably be
7086 complaint (&symfile_complaints
,
7087 _("unhandled containing DIE tag %d for DIE at %d"),
7088 parent
->tag
, to_underlying (pdi
->sect_off
));
7089 parent
->scope
= grandparent_scope
;
7092 parent
->scope_set
= 1;
7093 return parent
->scope
;
7096 /* Return the fully scoped name associated with PDI, from compilation unit
7097 CU. The result will be allocated with malloc. */
7100 partial_die_full_name (struct partial_die_info
*pdi
,
7101 struct dwarf2_cu
*cu
)
7103 const char *parent_scope
;
7105 /* If this is a template instantiation, we can not work out the
7106 template arguments from partial DIEs. So, unfortunately, we have
7107 to go through the full DIEs. At least any work we do building
7108 types here will be reused if full symbols are loaded later. */
7109 if (pdi
->has_template_arguments
)
7111 fixup_partial_die (pdi
, cu
);
7113 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
7115 struct die_info
*die
;
7116 struct attribute attr
;
7117 struct dwarf2_cu
*ref_cu
= cu
;
7119 /* DW_FORM_ref_addr is using section offset. */
7120 attr
.name
= (enum dwarf_attribute
) 0;
7121 attr
.form
= DW_FORM_ref_addr
;
7122 attr
.u
.unsnd
= to_underlying (pdi
->sect_off
);
7123 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
7125 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
7129 parent_scope
= partial_die_parent_scope (pdi
, cu
);
7130 if (parent_scope
== NULL
)
7133 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
7137 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
7139 struct objfile
*objfile
= cu
->objfile
;
7140 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7142 const char *actual_name
= NULL
;
7144 char *built_actual_name
;
7146 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7148 built_actual_name
= partial_die_full_name (pdi
, cu
);
7149 if (built_actual_name
!= NULL
)
7150 actual_name
= built_actual_name
;
7152 if (actual_name
== NULL
)
7153 actual_name
= pdi
->name
;
7157 case DW_TAG_subprogram
:
7158 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
);
7159 if (pdi
->is_external
|| cu
->language
== language_ada
)
7161 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
7162 of the global scope. But in Ada, we want to be able to access
7163 nested procedures globally. So all Ada subprograms are stored
7164 in the global scope. */
7165 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7166 built_actual_name
!= NULL
,
7167 VAR_DOMAIN
, LOC_BLOCK
,
7168 &objfile
->global_psymbols
,
7169 addr
, cu
->language
, objfile
);
7173 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7174 built_actual_name
!= NULL
,
7175 VAR_DOMAIN
, LOC_BLOCK
,
7176 &objfile
->static_psymbols
,
7177 addr
, cu
->language
, objfile
);
7180 if (pdi
->main_subprogram
&& actual_name
!= NULL
)
7181 set_objfile_main_name (objfile
, actual_name
, cu
->language
);
7183 case DW_TAG_constant
:
7185 struct psymbol_allocation_list
*list
;
7187 if (pdi
->is_external
)
7188 list
= &objfile
->global_psymbols
;
7190 list
= &objfile
->static_psymbols
;
7191 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7192 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
7193 list
, 0, cu
->language
, objfile
);
7196 case DW_TAG_variable
:
7198 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
7202 && !dwarf2_per_objfile
->has_section_at_zero
)
7204 /* A global or static variable may also have been stripped
7205 out by the linker if unused, in which case its address
7206 will be nullified; do not add such variables into partial
7207 symbol table then. */
7209 else if (pdi
->is_external
)
7212 Don't enter into the minimal symbol tables as there is
7213 a minimal symbol table entry from the ELF symbols already.
7214 Enter into partial symbol table if it has a location
7215 descriptor or a type.
7216 If the location descriptor is missing, new_symbol will create
7217 a LOC_UNRESOLVED symbol, the address of the variable will then
7218 be determined from the minimal symbol table whenever the variable
7220 The address for the partial symbol table entry is not
7221 used by GDB, but it comes in handy for debugging partial symbol
7224 if (pdi
->d
.locdesc
|| pdi
->has_type
)
7225 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7226 built_actual_name
!= NULL
,
7227 VAR_DOMAIN
, LOC_STATIC
,
7228 &objfile
->global_psymbols
,
7230 cu
->language
, objfile
);
7234 int has_loc
= pdi
->d
.locdesc
!= NULL
;
7236 /* Static Variable. Skip symbols whose value we cannot know (those
7237 without location descriptors or constant values). */
7238 if (!has_loc
&& !pdi
->has_const_value
)
7240 xfree (built_actual_name
);
7244 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7245 built_actual_name
!= NULL
,
7246 VAR_DOMAIN
, LOC_STATIC
,
7247 &objfile
->static_psymbols
,
7248 has_loc
? addr
+ baseaddr
: (CORE_ADDR
) 0,
7249 cu
->language
, objfile
);
7252 case DW_TAG_typedef
:
7253 case DW_TAG_base_type
:
7254 case DW_TAG_subrange_type
:
7255 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7256 built_actual_name
!= NULL
,
7257 VAR_DOMAIN
, LOC_TYPEDEF
,
7258 &objfile
->static_psymbols
,
7259 0, cu
->language
, objfile
);
7261 case DW_TAG_imported_declaration
:
7262 case DW_TAG_namespace
:
7263 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7264 built_actual_name
!= NULL
,
7265 VAR_DOMAIN
, LOC_TYPEDEF
,
7266 &objfile
->global_psymbols
,
7267 0, cu
->language
, objfile
);
7270 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7271 built_actual_name
!= NULL
,
7272 MODULE_DOMAIN
, LOC_TYPEDEF
,
7273 &objfile
->global_psymbols
,
7274 0, cu
->language
, objfile
);
7276 case DW_TAG_class_type
:
7277 case DW_TAG_interface_type
:
7278 case DW_TAG_structure_type
:
7279 case DW_TAG_union_type
:
7280 case DW_TAG_enumeration_type
:
7281 /* Skip external references. The DWARF standard says in the section
7282 about "Structure, Union, and Class Type Entries": "An incomplete
7283 structure, union or class type is represented by a structure,
7284 union or class entry that does not have a byte size attribute
7285 and that has a DW_AT_declaration attribute." */
7286 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
7288 xfree (built_actual_name
);
7292 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
7293 static vs. global. */
7294 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7295 built_actual_name
!= NULL
,
7296 STRUCT_DOMAIN
, LOC_TYPEDEF
,
7297 cu
->language
== language_cplus
7298 ? &objfile
->global_psymbols
7299 : &objfile
->static_psymbols
,
7300 0, cu
->language
, objfile
);
7303 case DW_TAG_enumerator
:
7304 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7305 built_actual_name
!= NULL
,
7306 VAR_DOMAIN
, LOC_CONST
,
7307 cu
->language
== language_cplus
7308 ? &objfile
->global_psymbols
7309 : &objfile
->static_psymbols
,
7310 0, cu
->language
, objfile
);
7316 xfree (built_actual_name
);
7319 /* Read a partial die corresponding to a namespace; also, add a symbol
7320 corresponding to that namespace to the symbol table. NAMESPACE is
7321 the name of the enclosing namespace. */
7324 add_partial_namespace (struct partial_die_info
*pdi
,
7325 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7326 int set_addrmap
, struct dwarf2_cu
*cu
)
7328 /* Add a symbol for the namespace. */
7330 add_partial_symbol (pdi
, cu
);
7332 /* Now scan partial symbols in that namespace. */
7334 if (pdi
->has_children
)
7335 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7338 /* Read a partial die corresponding to a Fortran module. */
7341 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
7342 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
7344 /* Add a symbol for the namespace. */
7346 add_partial_symbol (pdi
, cu
);
7348 /* Now scan partial symbols in that module. */
7350 if (pdi
->has_children
)
7351 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7354 /* Read a partial die corresponding to a subprogram and create a partial
7355 symbol for that subprogram. When the CU language allows it, this
7356 routine also defines a partial symbol for each nested subprogram
7357 that this subprogram contains. If SET_ADDRMAP is true, record the
7358 covered ranges in the addrmap. Set *LOWPC and *HIGHPC to the lowest
7359 and highest PC values found in PDI.
7361 PDI may also be a lexical block, in which case we simply search
7362 recursively for subprograms defined inside that lexical block.
7363 Again, this is only performed when the CU language allows this
7364 type of definitions. */
7367 add_partial_subprogram (struct partial_die_info
*pdi
,
7368 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7369 int set_addrmap
, struct dwarf2_cu
*cu
)
7371 if (pdi
->tag
== DW_TAG_subprogram
)
7373 if (pdi
->has_pc_info
)
7375 if (pdi
->lowpc
< *lowpc
)
7376 *lowpc
= pdi
->lowpc
;
7377 if (pdi
->highpc
> *highpc
)
7378 *highpc
= pdi
->highpc
;
7381 struct objfile
*objfile
= cu
->objfile
;
7382 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7387 baseaddr
= ANOFFSET (objfile
->section_offsets
,
7388 SECT_OFF_TEXT (objfile
));
7389 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7390 pdi
->lowpc
+ baseaddr
);
7391 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7392 pdi
->highpc
+ baseaddr
);
7393 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
7394 cu
->per_cu
->v
.psymtab
);
7398 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
7400 if (!pdi
->is_declaration
)
7401 /* Ignore subprogram DIEs that do not have a name, they are
7402 illegal. Do not emit a complaint at this point, we will
7403 do so when we convert this psymtab into a symtab. */
7405 add_partial_symbol (pdi
, cu
);
7409 if (! pdi
->has_children
)
7412 if (cu
->language
== language_ada
)
7414 pdi
= pdi
->die_child
;
7417 fixup_partial_die (pdi
, cu
);
7418 if (pdi
->tag
== DW_TAG_subprogram
7419 || pdi
->tag
== DW_TAG_lexical_block
)
7420 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
7421 pdi
= pdi
->die_sibling
;
7426 /* Read a partial die corresponding to an enumeration type. */
7429 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
7430 struct dwarf2_cu
*cu
)
7432 struct partial_die_info
*pdi
;
7434 if (enum_pdi
->name
!= NULL
)
7435 add_partial_symbol (enum_pdi
, cu
);
7437 pdi
= enum_pdi
->die_child
;
7440 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
7441 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
7443 add_partial_symbol (pdi
, cu
);
7444 pdi
= pdi
->die_sibling
;
7448 /* Return the initial uleb128 in the die at INFO_PTR. */
7451 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
7453 unsigned int bytes_read
;
7455 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7458 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
7459 Return the corresponding abbrev, or NULL if the number is zero (indicating
7460 an empty DIE). In either case *BYTES_READ will be set to the length of
7461 the initial number. */
7463 static struct abbrev_info
*
7464 peek_die_abbrev (const gdb_byte
*info_ptr
, unsigned int *bytes_read
,
7465 struct dwarf2_cu
*cu
)
7467 bfd
*abfd
= cu
->objfile
->obfd
;
7468 unsigned int abbrev_number
;
7469 struct abbrev_info
*abbrev
;
7471 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
7473 if (abbrev_number
== 0)
7476 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
7479 error (_("Dwarf Error: Could not find abbrev number %d in %s"
7480 " at offset 0x%x [in module %s]"),
7481 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
7482 to_underlying (cu
->header
.sect_off
), bfd_get_filename (abfd
));
7488 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7489 Returns a pointer to the end of a series of DIEs, terminated by an empty
7490 DIE. Any children of the skipped DIEs will also be skipped. */
7492 static const gdb_byte
*
7493 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
7495 struct dwarf2_cu
*cu
= reader
->cu
;
7496 struct abbrev_info
*abbrev
;
7497 unsigned int bytes_read
;
7501 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
7503 return info_ptr
+ bytes_read
;
7505 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
7509 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7510 INFO_PTR should point just after the initial uleb128 of a DIE, and the
7511 abbrev corresponding to that skipped uleb128 should be passed in
7512 ABBREV. Returns a pointer to this DIE's sibling, skipping any
7515 static const gdb_byte
*
7516 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
7517 struct abbrev_info
*abbrev
)
7519 unsigned int bytes_read
;
7520 struct attribute attr
;
7521 bfd
*abfd
= reader
->abfd
;
7522 struct dwarf2_cu
*cu
= reader
->cu
;
7523 const gdb_byte
*buffer
= reader
->buffer
;
7524 const gdb_byte
*buffer_end
= reader
->buffer_end
;
7525 unsigned int form
, i
;
7527 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
7529 /* The only abbrev we care about is DW_AT_sibling. */
7530 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
7532 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
7533 if (attr
.form
== DW_FORM_ref_addr
)
7534 complaint (&symfile_complaints
,
7535 _("ignoring absolute DW_AT_sibling"));
7538 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
7539 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
7541 if (sibling_ptr
< info_ptr
)
7542 complaint (&symfile_complaints
,
7543 _("DW_AT_sibling points backwards"));
7544 else if (sibling_ptr
> reader
->buffer_end
)
7545 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
7551 /* If it isn't DW_AT_sibling, skip this attribute. */
7552 form
= abbrev
->attrs
[i
].form
;
7556 case DW_FORM_ref_addr
:
7557 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
7558 and later it is offset sized. */
7559 if (cu
->header
.version
== 2)
7560 info_ptr
+= cu
->header
.addr_size
;
7562 info_ptr
+= cu
->header
.offset_size
;
7564 case DW_FORM_GNU_ref_alt
:
7565 info_ptr
+= cu
->header
.offset_size
;
7568 info_ptr
+= cu
->header
.addr_size
;
7575 case DW_FORM_flag_present
:
7576 case DW_FORM_implicit_const
:
7588 case DW_FORM_ref_sig8
:
7591 case DW_FORM_data16
:
7594 case DW_FORM_string
:
7595 read_direct_string (abfd
, info_ptr
, &bytes_read
);
7596 info_ptr
+= bytes_read
;
7598 case DW_FORM_sec_offset
:
7600 case DW_FORM_GNU_strp_alt
:
7601 info_ptr
+= cu
->header
.offset_size
;
7603 case DW_FORM_exprloc
:
7605 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7606 info_ptr
+= bytes_read
;
7608 case DW_FORM_block1
:
7609 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
7611 case DW_FORM_block2
:
7612 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
7614 case DW_FORM_block4
:
7615 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
7619 case DW_FORM_ref_udata
:
7620 case DW_FORM_GNU_addr_index
:
7621 case DW_FORM_GNU_str_index
:
7622 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
7624 case DW_FORM_indirect
:
7625 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7626 info_ptr
+= bytes_read
;
7627 /* We need to continue parsing from here, so just go back to
7629 goto skip_attribute
;
7632 error (_("Dwarf Error: Cannot handle %s "
7633 "in DWARF reader [in module %s]"),
7634 dwarf_form_name (form
),
7635 bfd_get_filename (abfd
));
7639 if (abbrev
->has_children
)
7640 return skip_children (reader
, info_ptr
);
7645 /* Locate ORIG_PDI's sibling.
7646 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
7648 static const gdb_byte
*
7649 locate_pdi_sibling (const struct die_reader_specs
*reader
,
7650 struct partial_die_info
*orig_pdi
,
7651 const gdb_byte
*info_ptr
)
7653 /* Do we know the sibling already? */
7655 if (orig_pdi
->sibling
)
7656 return orig_pdi
->sibling
;
7658 /* Are there any children to deal with? */
7660 if (!orig_pdi
->has_children
)
7663 /* Skip the children the long way. */
7665 return skip_children (reader
, info_ptr
);
7668 /* Expand this partial symbol table into a full symbol table. SELF is
7672 dwarf2_read_symtab (struct partial_symtab
*self
,
7673 struct objfile
*objfile
)
7677 warning (_("bug: psymtab for %s is already read in."),
7684 printf_filtered (_("Reading in symbols for %s..."),
7686 gdb_flush (gdb_stdout
);
7689 /* Restore our global data. */
7691 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
7692 dwarf2_objfile_data_key
);
7694 /* If this psymtab is constructed from a debug-only objfile, the
7695 has_section_at_zero flag will not necessarily be correct. We
7696 can get the correct value for this flag by looking at the data
7697 associated with the (presumably stripped) associated objfile. */
7698 if (objfile
->separate_debug_objfile_backlink
)
7700 struct dwarf2_per_objfile
*dpo_backlink
7701 = ((struct dwarf2_per_objfile
*)
7702 objfile_data (objfile
->separate_debug_objfile_backlink
,
7703 dwarf2_objfile_data_key
));
7705 dwarf2_per_objfile
->has_section_at_zero
7706 = dpo_backlink
->has_section_at_zero
;
7709 dwarf2_per_objfile
->reading_partial_symbols
= 0;
7711 psymtab_to_symtab_1 (self
);
7713 /* Finish up the debug error message. */
7715 printf_filtered (_("done.\n"));
7718 process_cu_includes ();
7721 /* Reading in full CUs. */
7723 /* Add PER_CU to the queue. */
7726 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
7727 enum language pretend_language
)
7729 struct dwarf2_queue_item
*item
;
7732 item
= XNEW (struct dwarf2_queue_item
);
7733 item
->per_cu
= per_cu
;
7734 item
->pretend_language
= pretend_language
;
7737 if (dwarf2_queue
== NULL
)
7738 dwarf2_queue
= item
;
7740 dwarf2_queue_tail
->next
= item
;
7742 dwarf2_queue_tail
= item
;
7745 /* If PER_CU is not yet queued, add it to the queue.
7746 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
7748 The result is non-zero if PER_CU was queued, otherwise the result is zero
7749 meaning either PER_CU is already queued or it is already loaded.
7751 N.B. There is an invariant here that if a CU is queued then it is loaded.
7752 The caller is required to load PER_CU if we return non-zero. */
7755 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
7756 struct dwarf2_per_cu_data
*per_cu
,
7757 enum language pretend_language
)
7759 /* We may arrive here during partial symbol reading, if we need full
7760 DIEs to process an unusual case (e.g. template arguments). Do
7761 not queue PER_CU, just tell our caller to load its DIEs. */
7762 if (dwarf2_per_objfile
->reading_partial_symbols
)
7764 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
7769 /* Mark the dependence relation so that we don't flush PER_CU
7771 if (dependent_cu
!= NULL
)
7772 dwarf2_add_dependence (dependent_cu
, per_cu
);
7774 /* If it's already on the queue, we have nothing to do. */
7778 /* If the compilation unit is already loaded, just mark it as
7780 if (per_cu
->cu
!= NULL
)
7782 per_cu
->cu
->last_used
= 0;
7786 /* Add it to the queue. */
7787 queue_comp_unit (per_cu
, pretend_language
);
7792 /* Process the queue. */
7795 process_queue (void)
7797 struct dwarf2_queue_item
*item
, *next_item
;
7799 if (dwarf_read_debug
)
7801 fprintf_unfiltered (gdb_stdlog
,
7802 "Expanding one or more symtabs of objfile %s ...\n",
7803 objfile_name (dwarf2_per_objfile
->objfile
));
7806 /* The queue starts out with one item, but following a DIE reference
7807 may load a new CU, adding it to the end of the queue. */
7808 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
7810 if ((dwarf2_per_objfile
->using_index
7811 ? !item
->per_cu
->v
.quick
->compunit_symtab
7812 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
7813 /* Skip dummy CUs. */
7814 && item
->per_cu
->cu
!= NULL
)
7816 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
7817 unsigned int debug_print_threshold
;
7820 if (per_cu
->is_debug_types
)
7822 struct signatured_type
*sig_type
=
7823 (struct signatured_type
*) per_cu
;
7825 sprintf (buf
, "TU %s at offset 0x%x",
7826 hex_string (sig_type
->signature
),
7827 to_underlying (per_cu
->sect_off
));
7828 /* There can be 100s of TUs.
7829 Only print them in verbose mode. */
7830 debug_print_threshold
= 2;
7834 sprintf (buf
, "CU at offset 0x%x",
7835 to_underlying (per_cu
->sect_off
));
7836 debug_print_threshold
= 1;
7839 if (dwarf_read_debug
>= debug_print_threshold
)
7840 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
7842 if (per_cu
->is_debug_types
)
7843 process_full_type_unit (per_cu
, item
->pretend_language
);
7845 process_full_comp_unit (per_cu
, item
->pretend_language
);
7847 if (dwarf_read_debug
>= debug_print_threshold
)
7848 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
7851 item
->per_cu
->queued
= 0;
7852 next_item
= item
->next
;
7856 dwarf2_queue_tail
= NULL
;
7858 if (dwarf_read_debug
)
7860 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
7861 objfile_name (dwarf2_per_objfile
->objfile
));
7865 /* Free all allocated queue entries. This function only releases anything if
7866 an error was thrown; if the queue was processed then it would have been
7867 freed as we went along. */
7870 dwarf2_release_queue (void *dummy
)
7872 struct dwarf2_queue_item
*item
, *last
;
7874 item
= dwarf2_queue
;
7877 /* Anything still marked queued is likely to be in an
7878 inconsistent state, so discard it. */
7879 if (item
->per_cu
->queued
)
7881 if (item
->per_cu
->cu
!= NULL
)
7882 free_one_cached_comp_unit (item
->per_cu
);
7883 item
->per_cu
->queued
= 0;
7891 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
7894 /* Read in full symbols for PST, and anything it depends on. */
7897 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
7899 struct dwarf2_per_cu_data
*per_cu
;
7905 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
7906 if (!pst
->dependencies
[i
]->readin
7907 && pst
->dependencies
[i
]->user
== NULL
)
7909 /* Inform about additional files that need to be read in. */
7912 /* FIXME: i18n: Need to make this a single string. */
7913 fputs_filtered (" ", gdb_stdout
);
7915 fputs_filtered ("and ", gdb_stdout
);
7917 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
7918 wrap_here (""); /* Flush output. */
7919 gdb_flush (gdb_stdout
);
7921 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
7924 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
7928 /* It's an include file, no symbols to read for it.
7929 Everything is in the parent symtab. */
7934 dw2_do_instantiate_symtab (per_cu
);
7937 /* Trivial hash function for die_info: the hash value of a DIE
7938 is its offset in .debug_info for this objfile. */
7941 die_hash (const void *item
)
7943 const struct die_info
*die
= (const struct die_info
*) item
;
7945 return to_underlying (die
->sect_off
);
7948 /* Trivial comparison function for die_info structures: two DIEs
7949 are equal if they have the same offset. */
7952 die_eq (const void *item_lhs
, const void *item_rhs
)
7954 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
7955 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
7957 return die_lhs
->sect_off
== die_rhs
->sect_off
;
7960 /* die_reader_func for load_full_comp_unit.
7961 This is identical to read_signatured_type_reader,
7962 but is kept separate for now. */
7965 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
7966 const gdb_byte
*info_ptr
,
7967 struct die_info
*comp_unit_die
,
7971 struct dwarf2_cu
*cu
= reader
->cu
;
7972 enum language
*language_ptr
= (enum language
*) data
;
7974 gdb_assert (cu
->die_hash
== NULL
);
7976 htab_create_alloc_ex (cu
->header
.length
/ 12,
7980 &cu
->comp_unit_obstack
,
7981 hashtab_obstack_allocate
,
7982 dummy_obstack_deallocate
);
7985 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
7986 &info_ptr
, comp_unit_die
);
7987 cu
->dies
= comp_unit_die
;
7988 /* comp_unit_die is not stored in die_hash, no need. */
7990 /* We try not to read any attributes in this function, because not
7991 all CUs needed for references have been loaded yet, and symbol
7992 table processing isn't initialized. But we have to set the CU language,
7993 or we won't be able to build types correctly.
7994 Similarly, if we do not read the producer, we can not apply
7995 producer-specific interpretation. */
7996 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
7999 /* Load the DIEs associated with PER_CU into memory. */
8002 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
8003 enum language pretend_language
)
8005 gdb_assert (! this_cu
->is_debug_types
);
8007 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
8008 load_full_comp_unit_reader
, &pretend_language
);
8011 /* Add a DIE to the delayed physname list. */
8014 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
8015 const char *name
, struct die_info
*die
,
8016 struct dwarf2_cu
*cu
)
8018 struct delayed_method_info mi
;
8020 mi
.fnfield_index
= fnfield_index
;
8024 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
8027 /* A cleanup for freeing the delayed method list. */
8030 free_delayed_list (void *ptr
)
8032 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
8033 if (cu
->method_list
!= NULL
)
8035 VEC_free (delayed_method_info
, cu
->method_list
);
8036 cu
->method_list
= NULL
;
8040 /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like
8041 "const" / "volatile". If so, decrements LEN by the length of the
8042 modifier and return true. Otherwise return false. */
8046 check_modifier (const char *physname
, size_t &len
, const char (&mod
)[N
])
8048 size_t mod_len
= sizeof (mod
) - 1;
8049 if (len
> mod_len
&& startswith (physname
+ (len
- mod_len
), mod
))
8057 /* Compute the physnames of any methods on the CU's method list.
8059 The computation of method physnames is delayed in order to avoid the
8060 (bad) condition that one of the method's formal parameters is of an as yet
8064 compute_delayed_physnames (struct dwarf2_cu
*cu
)
8067 struct delayed_method_info
*mi
;
8069 /* Only C++ delays computing physnames. */
8070 if (VEC_empty (delayed_method_info
, cu
->method_list
))
8072 gdb_assert (cu
->language
== language_cplus
);
8074 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
8076 const char *physname
;
8077 struct fn_fieldlist
*fn_flp
8078 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
8079 physname
= dwarf2_physname (mi
->name
, mi
->die
, cu
);
8080 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
->index
)
8081 = physname
? physname
: "";
8083 /* Since there's no tag to indicate whether a method is a
8084 const/volatile overload, extract that information out of the
8086 if (physname
!= NULL
)
8088 size_t len
= strlen (physname
);
8092 if (physname
[len
] == ')') /* shortcut */
8094 else if (check_modifier (physname
, len
, " const"))
8095 TYPE_FN_FIELD_CONST (fn_flp
->fn_fields
, mi
->index
) = 1;
8096 else if (check_modifier (physname
, len
, " volatile"))
8097 TYPE_FN_FIELD_VOLATILE (fn_flp
->fn_fields
, mi
->index
) = 1;
8105 /* Go objects should be embedded in a DW_TAG_module DIE,
8106 and it's not clear if/how imported objects will appear.
8107 To keep Go support simple until that's worked out,
8108 go back through what we've read and create something usable.
8109 We could do this while processing each DIE, and feels kinda cleaner,
8110 but that way is more invasive.
8111 This is to, for example, allow the user to type "p var" or "b main"
8112 without having to specify the package name, and allow lookups
8113 of module.object to work in contexts that use the expression
8117 fixup_go_packaging (struct dwarf2_cu
*cu
)
8119 char *package_name
= NULL
;
8120 struct pending
*list
;
8123 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
8125 for (i
= 0; i
< list
->nsyms
; ++i
)
8127 struct symbol
*sym
= list
->symbol
[i
];
8129 if (SYMBOL_LANGUAGE (sym
) == language_go
8130 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
8132 char *this_package_name
= go_symbol_package_name (sym
);
8134 if (this_package_name
== NULL
)
8136 if (package_name
== NULL
)
8137 package_name
= this_package_name
;
8140 if (strcmp (package_name
, this_package_name
) != 0)
8141 complaint (&symfile_complaints
,
8142 _("Symtab %s has objects from two different Go packages: %s and %s"),
8143 (symbol_symtab (sym
) != NULL
8144 ? symtab_to_filename_for_display
8145 (symbol_symtab (sym
))
8146 : objfile_name (cu
->objfile
)),
8147 this_package_name
, package_name
);
8148 xfree (this_package_name
);
8154 if (package_name
!= NULL
)
8156 struct objfile
*objfile
= cu
->objfile
;
8157 const char *saved_package_name
8158 = (const char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8160 strlen (package_name
));
8161 struct type
*type
= init_type (objfile
, TYPE_CODE_MODULE
, 0,
8162 saved_package_name
);
8165 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
8167 sym
= allocate_symbol (objfile
);
8168 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
8169 SYMBOL_SET_NAMES (sym
, saved_package_name
,
8170 strlen (saved_package_name
), 0, objfile
);
8171 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
8172 e.g., "main" finds the "main" module and not C's main(). */
8173 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
8174 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
8175 SYMBOL_TYPE (sym
) = type
;
8177 add_symbol_to_list (sym
, &global_symbols
);
8179 xfree (package_name
);
8183 /* Return the symtab for PER_CU. This works properly regardless of
8184 whether we're using the index or psymtabs. */
8186 static struct compunit_symtab
*
8187 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
8189 return (dwarf2_per_objfile
->using_index
8190 ? per_cu
->v
.quick
->compunit_symtab
8191 : per_cu
->v
.psymtab
->compunit_symtab
);
8194 /* A helper function for computing the list of all symbol tables
8195 included by PER_CU. */
8198 recursively_compute_inclusions (VEC (compunit_symtab_ptr
) **result
,
8199 htab_t all_children
, htab_t all_type_symtabs
,
8200 struct dwarf2_per_cu_data
*per_cu
,
8201 struct compunit_symtab
*immediate_parent
)
8205 struct compunit_symtab
*cust
;
8206 struct dwarf2_per_cu_data
*iter
;
8208 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
8211 /* This inclusion and its children have been processed. */
8216 /* Only add a CU if it has a symbol table. */
8217 cust
= get_compunit_symtab (per_cu
);
8220 /* If this is a type unit only add its symbol table if we haven't
8221 seen it yet (type unit per_cu's can share symtabs). */
8222 if (per_cu
->is_debug_types
)
8224 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
8228 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
8229 if (cust
->user
== NULL
)
8230 cust
->user
= immediate_parent
;
8235 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
8236 if (cust
->user
== NULL
)
8237 cust
->user
= immediate_parent
;
8242 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
8245 recursively_compute_inclusions (result
, all_children
,
8246 all_type_symtabs
, iter
, cust
);
8250 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
8254 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
8256 gdb_assert (! per_cu
->is_debug_types
);
8258 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
8261 struct dwarf2_per_cu_data
*per_cu_iter
;
8262 struct compunit_symtab
*compunit_symtab_iter
;
8263 VEC (compunit_symtab_ptr
) *result_symtabs
= NULL
;
8264 htab_t all_children
, all_type_symtabs
;
8265 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
8267 /* If we don't have a symtab, we can just skip this case. */
8271 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
8272 NULL
, xcalloc
, xfree
);
8273 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
8274 NULL
, xcalloc
, xfree
);
8277 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
8281 recursively_compute_inclusions (&result_symtabs
, all_children
,
8282 all_type_symtabs
, per_cu_iter
,
8286 /* Now we have a transitive closure of all the included symtabs. */
8287 len
= VEC_length (compunit_symtab_ptr
, result_symtabs
);
8289 = XOBNEWVEC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
8290 struct compunit_symtab
*, len
+ 1);
8292 VEC_iterate (compunit_symtab_ptr
, result_symtabs
, ix
,
8293 compunit_symtab_iter
);
8295 cust
->includes
[ix
] = compunit_symtab_iter
;
8296 cust
->includes
[len
] = NULL
;
8298 VEC_free (compunit_symtab_ptr
, result_symtabs
);
8299 htab_delete (all_children
);
8300 htab_delete (all_type_symtabs
);
8304 /* Compute the 'includes' field for the symtabs of all the CUs we just
8308 process_cu_includes (void)
8311 struct dwarf2_per_cu_data
*iter
;
8314 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
8318 if (! iter
->is_debug_types
)
8319 compute_compunit_symtab_includes (iter
);
8322 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
8325 /* Generate full symbol information for PER_CU, whose DIEs have
8326 already been loaded into memory. */
8329 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
8330 enum language pretend_language
)
8332 struct dwarf2_cu
*cu
= per_cu
->cu
;
8333 struct objfile
*objfile
= per_cu
->objfile
;
8334 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8335 CORE_ADDR lowpc
, highpc
;
8336 struct compunit_symtab
*cust
;
8337 struct cleanup
*back_to
, *delayed_list_cleanup
;
8339 struct block
*static_block
;
8342 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8345 back_to
= make_cleanup (really_free_pendings
, NULL
);
8346 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
8348 cu
->list_in_scope
= &file_symbols
;
8350 cu
->language
= pretend_language
;
8351 cu
->language_defn
= language_def (cu
->language
);
8353 /* Do line number decoding in read_file_scope () */
8354 process_die (cu
->dies
, cu
);
8356 /* For now fudge the Go package. */
8357 if (cu
->language
== language_go
)
8358 fixup_go_packaging (cu
);
8360 /* Now that we have processed all the DIEs in the CU, all the types
8361 should be complete, and it should now be safe to compute all of the
8363 compute_delayed_physnames (cu
);
8364 do_cleanups (delayed_list_cleanup
);
8366 /* Some compilers don't define a DW_AT_high_pc attribute for the
8367 compilation unit. If the DW_AT_high_pc is missing, synthesize
8368 it, by scanning the DIE's below the compilation unit. */
8369 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
8371 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
8372 static_block
= end_symtab_get_static_block (addr
, 0, 1);
8374 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
8375 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
8376 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
8377 addrmap to help ensure it has an accurate map of pc values belonging to
8379 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
8381 cust
= end_symtab_from_static_block (static_block
,
8382 SECT_OFF_TEXT (objfile
), 0);
8386 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
8388 /* Set symtab language to language from DW_AT_language. If the
8389 compilation is from a C file generated by language preprocessors, do
8390 not set the language if it was already deduced by start_subfile. */
8391 if (!(cu
->language
== language_c
8392 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
8393 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8395 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
8396 produce DW_AT_location with location lists but it can be possibly
8397 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
8398 there were bugs in prologue debug info, fixed later in GCC-4.5
8399 by "unwind info for epilogues" patch (which is not directly related).
8401 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
8402 needed, it would be wrong due to missing DW_AT_producer there.
8404 Still one can confuse GDB by using non-standard GCC compilation
8405 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
8407 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
8408 cust
->locations_valid
= 1;
8410 if (gcc_4_minor
>= 5)
8411 cust
->epilogue_unwind_valid
= 1;
8413 cust
->call_site_htab
= cu
->call_site_htab
;
8416 if (dwarf2_per_objfile
->using_index
)
8417 per_cu
->v
.quick
->compunit_symtab
= cust
;
8420 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8421 pst
->compunit_symtab
= cust
;
8425 /* Push it for inclusion processing later. */
8426 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
8428 do_cleanups (back_to
);
8431 /* Generate full symbol information for type unit PER_CU, whose DIEs have
8432 already been loaded into memory. */
8435 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
8436 enum language pretend_language
)
8438 struct dwarf2_cu
*cu
= per_cu
->cu
;
8439 struct objfile
*objfile
= per_cu
->objfile
;
8440 struct compunit_symtab
*cust
;
8441 struct cleanup
*back_to
, *delayed_list_cleanup
;
8442 struct signatured_type
*sig_type
;
8444 gdb_assert (per_cu
->is_debug_types
);
8445 sig_type
= (struct signatured_type
*) per_cu
;
8448 back_to
= make_cleanup (really_free_pendings
, NULL
);
8449 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
8451 cu
->list_in_scope
= &file_symbols
;
8453 cu
->language
= pretend_language
;
8454 cu
->language_defn
= language_def (cu
->language
);
8456 /* The symbol tables are set up in read_type_unit_scope. */
8457 process_die (cu
->dies
, cu
);
8459 /* For now fudge the Go package. */
8460 if (cu
->language
== language_go
)
8461 fixup_go_packaging (cu
);
8463 /* Now that we have processed all the DIEs in the CU, all the types
8464 should be complete, and it should now be safe to compute all of the
8466 compute_delayed_physnames (cu
);
8467 do_cleanups (delayed_list_cleanup
);
8469 /* TUs share symbol tables.
8470 If this is the first TU to use this symtab, complete the construction
8471 of it with end_expandable_symtab. Otherwise, complete the addition of
8472 this TU's symbols to the existing symtab. */
8473 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
8475 cust
= end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
8476 sig_type
->type_unit_group
->compunit_symtab
= cust
;
8480 /* Set symtab language to language from DW_AT_language. If the
8481 compilation is from a C file generated by language preprocessors,
8482 do not set the language if it was already deduced by
8484 if (!(cu
->language
== language_c
8485 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
8486 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8491 augment_type_symtab ();
8492 cust
= sig_type
->type_unit_group
->compunit_symtab
;
8495 if (dwarf2_per_objfile
->using_index
)
8496 per_cu
->v
.quick
->compunit_symtab
= cust
;
8499 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8500 pst
->compunit_symtab
= cust
;
8504 do_cleanups (back_to
);
8507 /* Process an imported unit DIE. */
8510 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8512 struct attribute
*attr
;
8514 /* For now we don't handle imported units in type units. */
8515 if (cu
->per_cu
->is_debug_types
)
8517 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8518 " supported in type units [in module %s]"),
8519 objfile_name (cu
->objfile
));
8522 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8525 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
8526 bool is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
8527 dwarf2_per_cu_data
*per_cu
8528 = dwarf2_find_containing_comp_unit (sect_off
, is_dwz
, cu
->objfile
);
8530 /* If necessary, add it to the queue and load its DIEs. */
8531 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
8532 load_full_comp_unit (per_cu
, cu
->language
);
8534 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
8539 /* RAII object that represents a process_die scope: i.e.,
8540 starts/finishes processing a DIE. */
8541 class process_die_scope
8544 process_die_scope (die_info
*die
, dwarf2_cu
*cu
)
8545 : m_die (die
), m_cu (cu
)
8547 /* We should only be processing DIEs not already in process. */
8548 gdb_assert (!m_die
->in_process
);
8549 m_die
->in_process
= true;
8552 ~process_die_scope ()
8554 m_die
->in_process
= false;
8556 /* If we're done processing the DIE for the CU that owns the line
8557 header, we don't need the line header anymore. */
8558 if (m_cu
->line_header_die_owner
== m_die
)
8560 delete m_cu
->line_header
;
8561 m_cu
->line_header
= NULL
;
8562 m_cu
->line_header_die_owner
= NULL
;
8571 /* Process a die and its children. */
8574 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8576 process_die_scope
scope (die
, cu
);
8580 case DW_TAG_padding
:
8582 case DW_TAG_compile_unit
:
8583 case DW_TAG_partial_unit
:
8584 read_file_scope (die
, cu
);
8586 case DW_TAG_type_unit
:
8587 read_type_unit_scope (die
, cu
);
8589 case DW_TAG_subprogram
:
8590 case DW_TAG_inlined_subroutine
:
8591 read_func_scope (die
, cu
);
8593 case DW_TAG_lexical_block
:
8594 case DW_TAG_try_block
:
8595 case DW_TAG_catch_block
:
8596 read_lexical_block_scope (die
, cu
);
8598 case DW_TAG_call_site
:
8599 case DW_TAG_GNU_call_site
:
8600 read_call_site_scope (die
, cu
);
8602 case DW_TAG_class_type
:
8603 case DW_TAG_interface_type
:
8604 case DW_TAG_structure_type
:
8605 case DW_TAG_union_type
:
8606 process_structure_scope (die
, cu
);
8608 case DW_TAG_enumeration_type
:
8609 process_enumeration_scope (die
, cu
);
8612 /* These dies have a type, but processing them does not create
8613 a symbol or recurse to process the children. Therefore we can
8614 read them on-demand through read_type_die. */
8615 case DW_TAG_subroutine_type
:
8616 case DW_TAG_set_type
:
8617 case DW_TAG_array_type
:
8618 case DW_TAG_pointer_type
:
8619 case DW_TAG_ptr_to_member_type
:
8620 case DW_TAG_reference_type
:
8621 case DW_TAG_rvalue_reference_type
:
8622 case DW_TAG_string_type
:
8625 case DW_TAG_base_type
:
8626 case DW_TAG_subrange_type
:
8627 case DW_TAG_typedef
:
8628 /* Add a typedef symbol for the type definition, if it has a
8630 new_symbol (die
, read_type_die (die
, cu
), cu
);
8632 case DW_TAG_common_block
:
8633 read_common_block (die
, cu
);
8635 case DW_TAG_common_inclusion
:
8637 case DW_TAG_namespace
:
8638 cu
->processing_has_namespace_info
= 1;
8639 read_namespace (die
, cu
);
8642 cu
->processing_has_namespace_info
= 1;
8643 read_module (die
, cu
);
8645 case DW_TAG_imported_declaration
:
8646 cu
->processing_has_namespace_info
= 1;
8647 if (read_namespace_alias (die
, cu
))
8649 /* The declaration is not a global namespace alias: fall through. */
8650 case DW_TAG_imported_module
:
8651 cu
->processing_has_namespace_info
= 1;
8652 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
8653 || cu
->language
!= language_fortran
))
8654 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
8655 dwarf_tag_name (die
->tag
));
8656 read_import_statement (die
, cu
);
8659 case DW_TAG_imported_unit
:
8660 process_imported_unit_die (die
, cu
);
8664 new_symbol (die
, NULL
, cu
);
8669 /* DWARF name computation. */
8671 /* A helper function for dwarf2_compute_name which determines whether DIE
8672 needs to have the name of the scope prepended to the name listed in the
8676 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
8678 struct attribute
*attr
;
8682 case DW_TAG_namespace
:
8683 case DW_TAG_typedef
:
8684 case DW_TAG_class_type
:
8685 case DW_TAG_interface_type
:
8686 case DW_TAG_structure_type
:
8687 case DW_TAG_union_type
:
8688 case DW_TAG_enumeration_type
:
8689 case DW_TAG_enumerator
:
8690 case DW_TAG_subprogram
:
8691 case DW_TAG_inlined_subroutine
:
8693 case DW_TAG_imported_declaration
:
8696 case DW_TAG_variable
:
8697 case DW_TAG_constant
:
8698 /* We only need to prefix "globally" visible variables. These include
8699 any variable marked with DW_AT_external or any variable that
8700 lives in a namespace. [Variables in anonymous namespaces
8701 require prefixing, but they are not DW_AT_external.] */
8703 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
8705 struct dwarf2_cu
*spec_cu
= cu
;
8707 return die_needs_namespace (die_specification (die
, &spec_cu
),
8711 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
8712 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
8713 && die
->parent
->tag
!= DW_TAG_module
)
8715 /* A variable in a lexical block of some kind does not need a
8716 namespace, even though in C++ such variables may be external
8717 and have a mangled name. */
8718 if (die
->parent
->tag
== DW_TAG_lexical_block
8719 || die
->parent
->tag
== DW_TAG_try_block
8720 || die
->parent
->tag
== DW_TAG_catch_block
8721 || die
->parent
->tag
== DW_TAG_subprogram
)
8730 /* Return the DIE's linkage name attribute, either DW_AT_linkage_name
8731 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
8732 defined for the given DIE. */
8734 static struct attribute
*
8735 dw2_linkage_name_attr (struct die_info
*die
, struct dwarf2_cu
*cu
)
8737 struct attribute
*attr
;
8739 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
8741 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8746 /* Return the DIE's linkage name as a string, either DW_AT_linkage_name
8747 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
8748 defined for the given DIE. */
8751 dw2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
8753 const char *linkage_name
;
8755 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
8756 if (linkage_name
== NULL
)
8757 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8759 return linkage_name
;
8762 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
8763 compute the physname for the object, which include a method's:
8764 - formal parameters (C++),
8765 - receiver type (Go),
8767 The term "physname" is a bit confusing.
8768 For C++, for example, it is the demangled name.
8769 For Go, for example, it's the mangled name.
8771 For Ada, return the DIE's linkage name rather than the fully qualified
8772 name. PHYSNAME is ignored..
8774 The result is allocated on the objfile_obstack and canonicalized. */
8777 dwarf2_compute_name (const char *name
,
8778 struct die_info
*die
, struct dwarf2_cu
*cu
,
8781 struct objfile
*objfile
= cu
->objfile
;
8784 name
= dwarf2_name (die
, cu
);
8786 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
8787 but otherwise compute it by typename_concat inside GDB.
8788 FIXME: Actually this is not really true, or at least not always true.
8789 It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle
8790 Fortran names because there is no mangling standard. So new_symbol_full
8791 will set the demangled name to the result of dwarf2_full_name, and it is
8792 the demangled name that GDB uses if it exists. */
8793 if (cu
->language
== language_ada
8794 || (cu
->language
== language_fortran
&& physname
))
8796 /* For Ada unit, we prefer the linkage name over the name, as
8797 the former contains the exported name, which the user expects
8798 to be able to reference. Ideally, we want the user to be able
8799 to reference this entity using either natural or linkage name,
8800 but we haven't started looking at this enhancement yet. */
8801 const char *linkage_name
= dw2_linkage_name (die
, cu
);
8803 if (linkage_name
!= NULL
)
8804 return linkage_name
;
8807 /* These are the only languages we know how to qualify names in. */
8809 && (cu
->language
== language_cplus
8810 || cu
->language
== language_fortran
|| cu
->language
== language_d
8811 || cu
->language
== language_rust
))
8813 if (die_needs_namespace (die
, cu
))
8817 const char *canonical_name
= NULL
;
8821 prefix
= determine_prefix (die
, cu
);
8822 if (*prefix
!= '\0')
8824 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
8827 buf
.puts (prefixed_name
);
8828 xfree (prefixed_name
);
8833 /* Template parameters may be specified in the DIE's DW_AT_name, or
8834 as children with DW_TAG_template_type_param or
8835 DW_TAG_value_type_param. If the latter, add them to the name
8836 here. If the name already has template parameters, then
8837 skip this step; some versions of GCC emit both, and
8838 it is more efficient to use the pre-computed name.
8840 Something to keep in mind about this process: it is very
8841 unlikely, or in some cases downright impossible, to produce
8842 something that will match the mangled name of a function.
8843 If the definition of the function has the same debug info,
8844 we should be able to match up with it anyway. But fallbacks
8845 using the minimal symbol, for instance to find a method
8846 implemented in a stripped copy of libstdc++, will not work.
8847 If we do not have debug info for the definition, we will have to
8848 match them up some other way.
8850 When we do name matching there is a related problem with function
8851 templates; two instantiated function templates are allowed to
8852 differ only by their return types, which we do not add here. */
8854 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
8856 struct attribute
*attr
;
8857 struct die_info
*child
;
8860 die
->building_fullname
= 1;
8862 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
8866 const gdb_byte
*bytes
;
8867 struct dwarf2_locexpr_baton
*baton
;
8870 if (child
->tag
!= DW_TAG_template_type_param
8871 && child
->tag
!= DW_TAG_template_value_param
)
8882 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
8885 complaint (&symfile_complaints
,
8886 _("template parameter missing DW_AT_type"));
8887 buf
.puts ("UNKNOWN_TYPE");
8890 type
= die_type (child
, cu
);
8892 if (child
->tag
== DW_TAG_template_type_param
)
8894 c_print_type (type
, "", &buf
, -1, 0, &type_print_raw_options
);
8898 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
8901 complaint (&symfile_complaints
,
8902 _("template parameter missing "
8903 "DW_AT_const_value"));
8904 buf
.puts ("UNKNOWN_VALUE");
8908 dwarf2_const_value_attr (attr
, type
, name
,
8909 &cu
->comp_unit_obstack
, cu
,
8910 &value
, &bytes
, &baton
);
8912 if (TYPE_NOSIGN (type
))
8913 /* GDB prints characters as NUMBER 'CHAR'. If that's
8914 changed, this can use value_print instead. */
8915 c_printchar (value
, type
, &buf
);
8918 struct value_print_options opts
;
8921 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
8925 else if (bytes
!= NULL
)
8927 v
= allocate_value (type
);
8928 memcpy (value_contents_writeable (v
), bytes
,
8929 TYPE_LENGTH (type
));
8932 v
= value_from_longest (type
, value
);
8934 /* Specify decimal so that we do not depend on
8936 get_formatted_print_options (&opts
, 'd');
8938 value_print (v
, &buf
, &opts
);
8944 die
->building_fullname
= 0;
8948 /* Close the argument list, with a space if necessary
8949 (nested templates). */
8950 if (!buf
.empty () && buf
.string ().back () == '>')
8957 /* For C++ methods, append formal parameter type
8958 information, if PHYSNAME. */
8960 if (physname
&& die
->tag
== DW_TAG_subprogram
8961 && cu
->language
== language_cplus
)
8963 struct type
*type
= read_type_die (die
, cu
);
8965 c_type_print_args (type
, &buf
, 1, cu
->language
,
8966 &type_print_raw_options
);
8968 if (cu
->language
== language_cplus
)
8970 /* Assume that an artificial first parameter is
8971 "this", but do not crash if it is not. RealView
8972 marks unnamed (and thus unused) parameters as
8973 artificial; there is no way to differentiate
8975 if (TYPE_NFIELDS (type
) > 0
8976 && TYPE_FIELD_ARTIFICIAL (type
, 0)
8977 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
8978 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
8980 buf
.puts (" const");
8984 const std::string
&intermediate_name
= buf
.string ();
8986 if (cu
->language
== language_cplus
)
8988 = dwarf2_canonicalize_name (intermediate_name
.c_str (), cu
,
8989 &objfile
->per_bfd
->storage_obstack
);
8991 /* If we only computed INTERMEDIATE_NAME, or if
8992 INTERMEDIATE_NAME is already canonical, then we need to
8993 copy it to the appropriate obstack. */
8994 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
.c_str ())
8995 name
= ((const char *)
8996 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8997 intermediate_name
.c_str (),
8998 intermediate_name
.length ()));
9000 name
= canonical_name
;
9007 /* Return the fully qualified name of DIE, based on its DW_AT_name.
9008 If scope qualifiers are appropriate they will be added. The result
9009 will be allocated on the storage_obstack, or NULL if the DIE does
9010 not have a name. NAME may either be from a previous call to
9011 dwarf2_name or NULL.
9013 The output string will be canonicalized (if C++). */
9016 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
9018 return dwarf2_compute_name (name
, die
, cu
, 0);
9021 /* Construct a physname for the given DIE in CU. NAME may either be
9022 from a previous call to dwarf2_name or NULL. The result will be
9023 allocated on the objfile_objstack or NULL if the DIE does not have a
9026 The output string will be canonicalized (if C++). */
9029 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
9031 struct objfile
*objfile
= cu
->objfile
;
9032 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
9033 struct cleanup
*back_to
;
9036 /* In this case dwarf2_compute_name is just a shortcut not building anything
9038 if (!die_needs_namespace (die
, cu
))
9039 return dwarf2_compute_name (name
, die
, cu
, 1);
9041 back_to
= make_cleanup (null_cleanup
, NULL
);
9043 mangled
= dw2_linkage_name (die
, cu
);
9045 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
9046 See https://github.com/rust-lang/rust/issues/32925. */
9047 if (cu
->language
== language_rust
&& mangled
!= NULL
9048 && strchr (mangled
, '{') != NULL
)
9051 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
9053 if (mangled
!= NULL
)
9057 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
9058 type. It is easier for GDB users to search for such functions as
9059 `name(params)' than `long name(params)'. In such case the minimal
9060 symbol names do not match the full symbol names but for template
9061 functions there is never a need to look up their definition from their
9062 declaration so the only disadvantage remains the minimal symbol
9063 variant `long name(params)' does not have the proper inferior type.
9066 if (cu
->language
== language_go
)
9068 /* This is a lie, but we already lie to the caller new_symbol_full.
9069 new_symbol_full assumes we return the mangled name.
9070 This just undoes that lie until things are cleaned up. */
9075 demangled
= gdb_demangle (mangled
,
9076 (DMGL_PARAMS
| DMGL_ANSI
| DMGL_RET_DROP
));
9080 make_cleanup (xfree
, demangled
);
9090 if (canon
== NULL
|| check_physname
)
9092 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
9094 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
9096 /* It may not mean a bug in GDB. The compiler could also
9097 compute DW_AT_linkage_name incorrectly. But in such case
9098 GDB would need to be bug-to-bug compatible. */
9100 complaint (&symfile_complaints
,
9101 _("Computed physname <%s> does not match demangled <%s> "
9102 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
9103 physname
, canon
, mangled
, to_underlying (die
->sect_off
),
9104 objfile_name (objfile
));
9106 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
9107 is available here - over computed PHYSNAME. It is safer
9108 against both buggy GDB and buggy compilers. */
9122 retval
= ((const char *)
9123 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
9124 retval
, strlen (retval
)));
9126 do_cleanups (back_to
);
9130 /* Inspect DIE in CU for a namespace alias. If one exists, record
9131 a new symbol for it.
9133 Returns 1 if a namespace alias was recorded, 0 otherwise. */
9136 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
9138 struct attribute
*attr
;
9140 /* If the die does not have a name, this is not a namespace
9142 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
9146 struct die_info
*d
= die
;
9147 struct dwarf2_cu
*imported_cu
= cu
;
9149 /* If the compiler has nested DW_AT_imported_declaration DIEs,
9150 keep inspecting DIEs until we hit the underlying import. */
9151 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
9152 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
9154 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
9158 d
= follow_die_ref (d
, attr
, &imported_cu
);
9159 if (d
->tag
!= DW_TAG_imported_declaration
)
9163 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
9165 complaint (&symfile_complaints
,
9166 _("DIE at 0x%x has too many recursively imported "
9167 "declarations"), to_underlying (d
->sect_off
));
9174 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
9176 type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
9177 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
9179 /* This declaration is a global namespace alias. Add
9180 a symbol for it whose type is the aliased namespace. */
9181 new_symbol (die
, type
, cu
);
9190 /* Return the using directives repository (global or local?) to use in the
9191 current context for LANGUAGE.
9193 For Ada, imported declarations can materialize renamings, which *may* be
9194 global. However it is impossible (for now?) in DWARF to distinguish
9195 "external" imported declarations and "static" ones. As all imported
9196 declarations seem to be static in all other languages, make them all CU-wide
9197 global only in Ada. */
9199 static struct using_direct
**
9200 using_directives (enum language language
)
9202 if (language
== language_ada
&& context_stack_depth
== 0)
9203 return &global_using_directives
;
9205 return &local_using_directives
;
9208 /* Read the import statement specified by the given die and record it. */
9211 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
9213 struct objfile
*objfile
= cu
->objfile
;
9214 struct attribute
*import_attr
;
9215 struct die_info
*imported_die
, *child_die
;
9216 struct dwarf2_cu
*imported_cu
;
9217 const char *imported_name
;
9218 const char *imported_name_prefix
;
9219 const char *canonical_name
;
9220 const char *import_alias
;
9221 const char *imported_declaration
= NULL
;
9222 const char *import_prefix
;
9223 std::vector
<const char *> excludes
;
9225 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
9226 if (import_attr
== NULL
)
9228 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
9229 dwarf_tag_name (die
->tag
));
9234 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
9235 imported_name
= dwarf2_name (imported_die
, imported_cu
);
9236 if (imported_name
== NULL
)
9238 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
9240 The import in the following code:
9254 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
9255 <52> DW_AT_decl_file : 1
9256 <53> DW_AT_decl_line : 6
9257 <54> DW_AT_import : <0x75>
9258 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
9260 <5b> DW_AT_decl_file : 1
9261 <5c> DW_AT_decl_line : 2
9262 <5d> DW_AT_type : <0x6e>
9264 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
9265 <76> DW_AT_byte_size : 4
9266 <77> DW_AT_encoding : 5 (signed)
9268 imports the wrong die ( 0x75 instead of 0x58 ).
9269 This case will be ignored until the gcc bug is fixed. */
9273 /* Figure out the local name after import. */
9274 import_alias
= dwarf2_name (die
, cu
);
9276 /* Figure out where the statement is being imported to. */
9277 import_prefix
= determine_prefix (die
, cu
);
9279 /* Figure out what the scope of the imported die is and prepend it
9280 to the name of the imported die. */
9281 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
9283 if (imported_die
->tag
!= DW_TAG_namespace
9284 && imported_die
->tag
!= DW_TAG_module
)
9286 imported_declaration
= imported_name
;
9287 canonical_name
= imported_name_prefix
;
9289 else if (strlen (imported_name_prefix
) > 0)
9290 canonical_name
= obconcat (&objfile
->objfile_obstack
,
9291 imported_name_prefix
,
9292 (cu
->language
== language_d
? "." : "::"),
9293 imported_name
, (char *) NULL
);
9295 canonical_name
= imported_name
;
9297 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
9298 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
9299 child_die
= sibling_die (child_die
))
9301 /* DWARF-4: A Fortran use statement with a “rename list” may be
9302 represented by an imported module entry with an import attribute
9303 referring to the module and owned entries corresponding to those
9304 entities that are renamed as part of being imported. */
9306 if (child_die
->tag
!= DW_TAG_imported_declaration
)
9308 complaint (&symfile_complaints
,
9309 _("child DW_TAG_imported_declaration expected "
9310 "- DIE at 0x%x [in module %s]"),
9311 to_underlying (child_die
->sect_off
), objfile_name (objfile
));
9315 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
9316 if (import_attr
== NULL
)
9318 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
9319 dwarf_tag_name (child_die
->tag
));
9324 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
9326 imported_name
= dwarf2_name (imported_die
, imported_cu
);
9327 if (imported_name
== NULL
)
9329 complaint (&symfile_complaints
,
9330 _("child DW_TAG_imported_declaration has unknown "
9331 "imported name - DIE at 0x%x [in module %s]"),
9332 to_underlying (child_die
->sect_off
), objfile_name (objfile
));
9336 excludes
.push_back (imported_name
);
9338 process_die (child_die
, cu
);
9341 add_using_directive (using_directives (cu
->language
),
9345 imported_declaration
,
9348 &objfile
->objfile_obstack
);
9351 /* ICC<14 does not output the required DW_AT_declaration on incomplete
9352 types, but gives them a size of zero. Starting with version 14,
9353 ICC is compatible with GCC. */
9356 producer_is_icc_lt_14 (struct dwarf2_cu
*cu
)
9358 if (!cu
->checked_producer
)
9359 check_producer (cu
);
9361 return cu
->producer_is_icc_lt_14
;
9364 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
9365 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
9366 this, it was first present in GCC release 4.3.0. */
9369 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
9371 if (!cu
->checked_producer
)
9372 check_producer (cu
);
9374 return cu
->producer_is_gcc_lt_4_3
;
9377 static file_and_directory
9378 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
)
9380 file_and_directory res
;
9382 /* Find the filename. Do not use dwarf2_name here, since the filename
9383 is not a source language identifier. */
9384 res
.name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
9385 res
.comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
9387 if (res
.comp_dir
== NULL
9388 && producer_is_gcc_lt_4_3 (cu
) && res
.name
!= NULL
9389 && IS_ABSOLUTE_PATH (res
.name
))
9391 res
.comp_dir_storage
= ldirname (res
.name
);
9392 if (!res
.comp_dir_storage
.empty ())
9393 res
.comp_dir
= res
.comp_dir_storage
.c_str ();
9395 if (res
.comp_dir
!= NULL
)
9397 /* Irix 6.2 native cc prepends <machine>.: to the compilation
9398 directory, get rid of it. */
9399 const char *cp
= strchr (res
.comp_dir
, ':');
9401 if (cp
&& cp
!= res
.comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
9402 res
.comp_dir
= cp
+ 1;
9405 if (res
.name
== NULL
)
9406 res
.name
= "<unknown>";
9411 /* Handle DW_AT_stmt_list for a compilation unit.
9412 DIE is the DW_TAG_compile_unit die for CU.
9413 COMP_DIR is the compilation directory. LOWPC is passed to
9414 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
9417 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
9418 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
9420 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9421 struct attribute
*attr
;
9422 struct line_header line_header_local
;
9423 hashval_t line_header_local_hash
;
9428 gdb_assert (! cu
->per_cu
->is_debug_types
);
9430 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9434 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
9436 /* The line header hash table is only created if needed (it exists to
9437 prevent redundant reading of the line table for partial_units).
9438 If we're given a partial_unit, we'll need it. If we're given a
9439 compile_unit, then use the line header hash table if it's already
9440 created, but don't create one just yet. */
9442 if (dwarf2_per_objfile
->line_header_hash
== NULL
9443 && die
->tag
== DW_TAG_partial_unit
)
9445 dwarf2_per_objfile
->line_header_hash
9446 = htab_create_alloc_ex (127, line_header_hash_voidp
,
9447 line_header_eq_voidp
,
9448 free_line_header_voidp
,
9449 &objfile
->objfile_obstack
,
9450 hashtab_obstack_allocate
,
9451 dummy_obstack_deallocate
);
9454 line_header_local
.sect_off
= line_offset
;
9455 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
9456 line_header_local_hash
= line_header_hash (&line_header_local
);
9457 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
9459 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
9461 line_header_local_hash
, NO_INSERT
);
9463 /* For DW_TAG_compile_unit we need info like symtab::linetable which
9464 is not present in *SLOT (since if there is something in *SLOT then
9465 it will be for a partial_unit). */
9466 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
9468 gdb_assert (*slot
!= NULL
);
9469 cu
->line_header
= (struct line_header
*) *slot
;
9474 /* dwarf_decode_line_header does not yet provide sufficient information.
9475 We always have to call also dwarf_decode_lines for it. */
9476 line_header_up lh
= dwarf_decode_line_header (line_offset
, cu
);
9480 cu
->line_header
= lh
.release ();
9481 cu
->line_header_die_owner
= die
;
9483 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
9487 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
9489 line_header_local_hash
, INSERT
);
9490 gdb_assert (slot
!= NULL
);
9492 if (slot
!= NULL
&& *slot
== NULL
)
9494 /* This newly decoded line number information unit will be owned
9495 by line_header_hash hash table. */
9496 *slot
= cu
->line_header
;
9497 cu
->line_header_die_owner
= NULL
;
9501 /* We cannot free any current entry in (*slot) as that struct line_header
9502 may be already used by multiple CUs. Create only temporary decoded
9503 line_header for this CU - it may happen at most once for each line
9504 number information unit. And if we're not using line_header_hash
9505 then this is what we want as well. */
9506 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
9508 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
9509 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
9514 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
9517 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9519 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9520 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9521 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
9522 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
9523 struct attribute
*attr
;
9524 struct die_info
*child_die
;
9527 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9529 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
9531 /* If we didn't find a lowpc, set it to highpc to avoid complaints
9532 from finish_block. */
9533 if (lowpc
== ((CORE_ADDR
) -1))
9535 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
9537 file_and_directory fnd
= find_file_and_directory (die
, cu
);
9539 prepare_one_comp_unit (cu
, die
, cu
->language
);
9541 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
9542 standardised yet. As a workaround for the language detection we fall
9543 back to the DW_AT_producer string. */
9544 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
9545 cu
->language
= language_opencl
;
9547 /* Similar hack for Go. */
9548 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
9549 set_cu_language (DW_LANG_Go
, cu
);
9551 dwarf2_start_symtab (cu
, fnd
.name
, fnd
.comp_dir
, lowpc
);
9553 /* Decode line number information if present. We do this before
9554 processing child DIEs, so that the line header table is available
9555 for DW_AT_decl_file. */
9556 handle_DW_AT_stmt_list (die
, cu
, fnd
.comp_dir
, lowpc
);
9558 /* Process all dies in compilation unit. */
9559 if (die
->child
!= NULL
)
9561 child_die
= die
->child
;
9562 while (child_die
&& child_die
->tag
)
9564 process_die (child_die
, cu
);
9565 child_die
= sibling_die (child_die
);
9569 /* Decode macro information, if present. Dwarf 2 macro information
9570 refers to information in the line number info statement program
9571 header, so we can only read it if we've read the header
9573 attr
= dwarf2_attr (die
, DW_AT_macros
, cu
);
9575 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
9576 if (attr
&& cu
->line_header
)
9578 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
9579 complaint (&symfile_complaints
,
9580 _("CU refers to both DW_AT_macros and DW_AT_macro_info"));
9582 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
9586 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
9587 if (attr
&& cu
->line_header
)
9589 unsigned int macro_offset
= DW_UNSND (attr
);
9591 dwarf_decode_macros (cu
, macro_offset
, 0);
9596 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
9597 Create the set of symtabs used by this TU, or if this TU is sharing
9598 symtabs with another TU and the symtabs have already been created
9599 then restore those symtabs in the line header.
9600 We don't need the pc/line-number mapping for type units. */
9603 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
9605 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
9606 struct type_unit_group
*tu_group
;
9608 struct attribute
*attr
;
9610 struct signatured_type
*sig_type
;
9612 gdb_assert (per_cu
->is_debug_types
);
9613 sig_type
= (struct signatured_type
*) per_cu
;
9615 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9617 /* If we're using .gdb_index (includes -readnow) then
9618 per_cu->type_unit_group may not have been set up yet. */
9619 if (sig_type
->type_unit_group
== NULL
)
9620 sig_type
->type_unit_group
= get_type_unit_group (cu
, attr
);
9621 tu_group
= sig_type
->type_unit_group
;
9623 /* If we've already processed this stmt_list there's no real need to
9624 do it again, we could fake it and just recreate the part we need
9625 (file name,index -> symtab mapping). If data shows this optimization
9626 is useful we can do it then. */
9627 first_time
= tu_group
->compunit_symtab
== NULL
;
9629 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
9634 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
9635 lh
= dwarf_decode_line_header (line_offset
, cu
);
9640 dwarf2_start_symtab (cu
, "", NULL
, 0);
9643 gdb_assert (tu_group
->symtabs
== NULL
);
9644 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9649 cu
->line_header
= lh
.release ();
9650 cu
->line_header_die_owner
= die
;
9654 struct compunit_symtab
*cust
= dwarf2_start_symtab (cu
, "", NULL
, 0);
9656 /* Note: We don't assign tu_group->compunit_symtab yet because we're
9657 still initializing it, and our caller (a few levels up)
9658 process_full_type_unit still needs to know if this is the first
9661 tu_group
->num_symtabs
= cu
->line_header
->file_names
.size ();
9662 tu_group
->symtabs
= XNEWVEC (struct symtab
*,
9663 cu
->line_header
->file_names
.size ());
9665 for (i
= 0; i
< cu
->line_header
->file_names
.size (); ++i
)
9667 file_entry
&fe
= cu
->line_header
->file_names
[i
];
9669 dwarf2_start_subfile (fe
.name
, fe
.include_dir (cu
->line_header
));
9671 if (current_subfile
->symtab
== NULL
)
9673 /* NOTE: start_subfile will recognize when it's been
9674 passed a file it has already seen. So we can't
9675 assume there's a simple mapping from
9676 cu->line_header->file_names to subfiles, plus
9677 cu->line_header->file_names may contain dups. */
9678 current_subfile
->symtab
9679 = allocate_symtab (cust
, current_subfile
->name
);
9682 fe
.symtab
= current_subfile
->symtab
;
9683 tu_group
->symtabs
[i
] = fe
.symtab
;
9688 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9690 for (i
= 0; i
< cu
->line_header
->file_names
.size (); ++i
)
9692 file_entry
&fe
= cu
->line_header
->file_names
[i
];
9694 fe
.symtab
= tu_group
->symtabs
[i
];
9698 /* The main symtab is allocated last. Type units don't have DW_AT_name
9699 so they don't have a "real" (so to speak) symtab anyway.
9700 There is later code that will assign the main symtab to all symbols
9701 that don't have one. We need to handle the case of a symbol with a
9702 missing symtab (DW_AT_decl_file) anyway. */
9705 /* Process DW_TAG_type_unit.
9706 For TUs we want to skip the first top level sibling if it's not the
9707 actual type being defined by this TU. In this case the first top
9708 level sibling is there to provide context only. */
9711 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9713 struct die_info
*child_die
;
9715 prepare_one_comp_unit (cu
, die
, language_minimal
);
9717 /* Initialize (or reinitialize) the machinery for building symtabs.
9718 We do this before processing child DIEs, so that the line header table
9719 is available for DW_AT_decl_file. */
9720 setup_type_unit_groups (die
, cu
);
9722 if (die
->child
!= NULL
)
9724 child_die
= die
->child
;
9725 while (child_die
&& child_die
->tag
)
9727 process_die (child_die
, cu
);
9728 child_die
= sibling_die (child_die
);
9735 http://gcc.gnu.org/wiki/DebugFission
9736 http://gcc.gnu.org/wiki/DebugFissionDWP
9738 To simplify handling of both DWO files ("object" files with the DWARF info)
9739 and DWP files (a file with the DWOs packaged up into one file), we treat
9740 DWP files as having a collection of virtual DWO files. */
9743 hash_dwo_file (const void *item
)
9745 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
9748 hash
= htab_hash_string (dwo_file
->dwo_name
);
9749 if (dwo_file
->comp_dir
!= NULL
)
9750 hash
+= htab_hash_string (dwo_file
->comp_dir
);
9755 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
9757 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
9758 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
9760 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
9762 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
9763 return lhs
->comp_dir
== rhs
->comp_dir
;
9764 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
9767 /* Allocate a hash table for DWO files. */
9770 allocate_dwo_file_hash_table (void)
9772 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9774 return htab_create_alloc_ex (41,
9778 &objfile
->objfile_obstack
,
9779 hashtab_obstack_allocate
,
9780 dummy_obstack_deallocate
);
9783 /* Lookup DWO file DWO_NAME. */
9786 lookup_dwo_file_slot (const char *dwo_name
, const char *comp_dir
)
9788 struct dwo_file find_entry
;
9791 if (dwarf2_per_objfile
->dwo_files
== NULL
)
9792 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
9794 memset (&find_entry
, 0, sizeof (find_entry
));
9795 find_entry
.dwo_name
= dwo_name
;
9796 find_entry
.comp_dir
= comp_dir
;
9797 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
9803 hash_dwo_unit (const void *item
)
9805 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
9807 /* This drops the top 32 bits of the id, but is ok for a hash. */
9808 return dwo_unit
->signature
;
9812 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
9814 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
9815 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
9817 /* The signature is assumed to be unique within the DWO file.
9818 So while object file CU dwo_id's always have the value zero,
9819 that's OK, assuming each object file DWO file has only one CU,
9820 and that's the rule for now. */
9821 return lhs
->signature
== rhs
->signature
;
9824 /* Allocate a hash table for DWO CUs,TUs.
9825 There is one of these tables for each of CUs,TUs for each DWO file. */
9828 allocate_dwo_unit_table (struct objfile
*objfile
)
9830 /* Start out with a pretty small number.
9831 Generally DWO files contain only one CU and maybe some TUs. */
9832 return htab_create_alloc_ex (3,
9836 &objfile
->objfile_obstack
,
9837 hashtab_obstack_allocate
,
9838 dummy_obstack_deallocate
);
9841 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
9843 struct create_dwo_cu_data
9845 struct dwo_file
*dwo_file
;
9846 struct dwo_unit dwo_unit
;
9849 /* die_reader_func for create_dwo_cu. */
9852 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
9853 const gdb_byte
*info_ptr
,
9854 struct die_info
*comp_unit_die
,
9858 struct dwarf2_cu
*cu
= reader
->cu
;
9859 sect_offset sect_off
= cu
->per_cu
->sect_off
;
9860 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
9861 struct create_dwo_cu_data
*data
= (struct create_dwo_cu_data
*) datap
;
9862 struct dwo_file
*dwo_file
= data
->dwo_file
;
9863 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
9864 struct attribute
*attr
;
9866 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
9869 complaint (&symfile_complaints
,
9870 _("Dwarf Error: debug entry at offset 0x%x is missing"
9871 " its dwo_id [in module %s]"),
9872 to_underlying (sect_off
), dwo_file
->dwo_name
);
9876 dwo_unit
->dwo_file
= dwo_file
;
9877 dwo_unit
->signature
= DW_UNSND (attr
);
9878 dwo_unit
->section
= section
;
9879 dwo_unit
->sect_off
= sect_off
;
9880 dwo_unit
->length
= cu
->per_cu
->length
;
9882 if (dwarf_read_debug
)
9883 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, dwo_id %s\n",
9884 to_underlying (sect_off
),
9885 hex_string (dwo_unit
->signature
));
9888 /* Create the dwo_units for the CUs in a DWO_FILE.
9889 Note: This function processes DWO files only, not DWP files. */
9892 create_cus_hash_table (struct dwo_file
&dwo_file
, dwarf2_section_info
§ion
,
9895 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9896 const struct dwarf2_section_info
*abbrev_section
= &dwo_file
.sections
.abbrev
;
9897 const gdb_byte
*info_ptr
, *end_ptr
;
9899 dwarf2_read_section (objfile
, §ion
);
9900 info_ptr
= section
.buffer
;
9902 if (info_ptr
== NULL
)
9905 if (dwarf_read_debug
)
9907 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
9908 get_section_name (§ion
),
9909 get_section_file_name (§ion
));
9912 end_ptr
= info_ptr
+ section
.size
;
9913 while (info_ptr
< end_ptr
)
9915 struct dwarf2_per_cu_data per_cu
;
9916 struct create_dwo_cu_data create_dwo_cu_data
;
9917 struct dwo_unit
*dwo_unit
;
9919 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
.buffer
);
9921 memset (&create_dwo_cu_data
.dwo_unit
, 0,
9922 sizeof (create_dwo_cu_data
.dwo_unit
));
9923 memset (&per_cu
, 0, sizeof (per_cu
));
9924 per_cu
.objfile
= objfile
;
9925 per_cu
.is_debug_types
= 0;
9926 per_cu
.sect_off
= sect_offset (info_ptr
- section
.buffer
);
9927 per_cu
.section
= §ion
;
9928 create_dwo_cu_data
.dwo_file
= &dwo_file
;
9930 init_cutu_and_read_dies_no_follow (
9931 &per_cu
, &dwo_file
, create_dwo_cu_reader
, &create_dwo_cu_data
);
9932 info_ptr
+= per_cu
.length
;
9934 // If the unit could not be parsed, skip it.
9935 if (create_dwo_cu_data
.dwo_unit
.dwo_file
== NULL
)
9938 if (cus_htab
== NULL
)
9939 cus_htab
= allocate_dwo_unit_table (objfile
);
9941 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
9942 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
9943 slot
= htab_find_slot (cus_htab
, dwo_unit
, INSERT
);
9944 gdb_assert (slot
!= NULL
);
9947 const struct dwo_unit
*dup_cu
= (const struct dwo_unit
*)*slot
;
9948 sect_offset dup_sect_off
= dup_cu
->sect_off
;
9950 complaint (&symfile_complaints
,
9951 _("debug cu entry at offset 0x%x is duplicate to"
9952 " the entry at offset 0x%x, signature %s"),
9953 to_underlying (sect_off
), to_underlying (dup_sect_off
),
9954 hex_string (dwo_unit
->signature
));
9956 *slot
= (void *)dwo_unit
;
9960 /* DWP file .debug_{cu,tu}_index section format:
9961 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
9965 Both index sections have the same format, and serve to map a 64-bit
9966 signature to a set of section numbers. Each section begins with a header,
9967 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
9968 indexes, and a pool of 32-bit section numbers. The index sections will be
9969 aligned at 8-byte boundaries in the file.
9971 The index section header consists of:
9973 V, 32 bit version number
9975 N, 32 bit number of compilation units or type units in the index
9976 M, 32 bit number of slots in the hash table
9978 Numbers are recorded using the byte order of the application binary.
9980 The hash table begins at offset 16 in the section, and consists of an array
9981 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
9982 order of the application binary). Unused slots in the hash table are 0.
9983 (We rely on the extreme unlikeliness of a signature being exactly 0.)
9985 The parallel table begins immediately after the hash table
9986 (at offset 16 + 8 * M from the beginning of the section), and consists of an
9987 array of 32-bit indexes (using the byte order of the application binary),
9988 corresponding 1-1 with slots in the hash table. Each entry in the parallel
9989 table contains a 32-bit index into the pool of section numbers. For unused
9990 hash table slots, the corresponding entry in the parallel table will be 0.
9992 The pool of section numbers begins immediately following the hash table
9993 (at offset 16 + 12 * M from the beginning of the section). The pool of
9994 section numbers consists of an array of 32-bit words (using the byte order
9995 of the application binary). Each item in the array is indexed starting
9996 from 0. The hash table entry provides the index of the first section
9997 number in the set. Additional section numbers in the set follow, and the
9998 set is terminated by a 0 entry (section number 0 is not used in ELF).
10000 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
10001 section must be the first entry in the set, and the .debug_abbrev.dwo must
10002 be the second entry. Other members of the set may follow in any order.
10008 DWP Version 2 combines all the .debug_info, etc. sections into one,
10009 and the entries in the index tables are now offsets into these sections.
10010 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
10013 Index Section Contents:
10015 Hash Table of Signatures dwp_hash_table.hash_table
10016 Parallel Table of Indices dwp_hash_table.unit_table
10017 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
10018 Table of Section Sizes dwp_hash_table.v2.sizes
10020 The index section header consists of:
10022 V, 32 bit version number
10023 L, 32 bit number of columns in the table of section offsets
10024 N, 32 bit number of compilation units or type units in the index
10025 M, 32 bit number of slots in the hash table
10027 Numbers are recorded using the byte order of the application binary.
10029 The hash table has the same format as version 1.
10030 The parallel table of indices has the same format as version 1,
10031 except that the entries are origin-1 indices into the table of sections
10032 offsets and the table of section sizes.
10034 The table of offsets begins immediately following the parallel table
10035 (at offset 16 + 12 * M from the beginning of the section). The table is
10036 a two-dimensional array of 32-bit words (using the byte order of the
10037 application binary), with L columns and N+1 rows, in row-major order.
10038 Each row in the array is indexed starting from 0. The first row provides
10039 a key to the remaining rows: each column in this row provides an identifier
10040 for a debug section, and the offsets in the same column of subsequent rows
10041 refer to that section. The section identifiers are:
10043 DW_SECT_INFO 1 .debug_info.dwo
10044 DW_SECT_TYPES 2 .debug_types.dwo
10045 DW_SECT_ABBREV 3 .debug_abbrev.dwo
10046 DW_SECT_LINE 4 .debug_line.dwo
10047 DW_SECT_LOC 5 .debug_loc.dwo
10048 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
10049 DW_SECT_MACINFO 7 .debug_macinfo.dwo
10050 DW_SECT_MACRO 8 .debug_macro.dwo
10052 The offsets provided by the CU and TU index sections are the base offsets
10053 for the contributions made by each CU or TU to the corresponding section
10054 in the package file. Each CU and TU header contains an abbrev_offset
10055 field, used to find the abbreviations table for that CU or TU within the
10056 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
10057 be interpreted as relative to the base offset given in the index section.
10058 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
10059 should be interpreted as relative to the base offset for .debug_line.dwo,
10060 and offsets into other debug sections obtained from DWARF attributes should
10061 also be interpreted as relative to the corresponding base offset.
10063 The table of sizes begins immediately following the table of offsets.
10064 Like the table of offsets, it is a two-dimensional array of 32-bit words,
10065 with L columns and N rows, in row-major order. Each row in the array is
10066 indexed starting from 1 (row 0 is shared by the two tables).
10070 Hash table lookup is handled the same in version 1 and 2:
10072 We assume that N and M will not exceed 2^32 - 1.
10073 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
10075 Given a 64-bit compilation unit signature or a type signature S, an entry
10076 in the hash table is located as follows:
10078 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
10079 the low-order k bits all set to 1.
10081 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
10083 3) If the hash table entry at index H matches the signature, use that
10084 entry. If the hash table entry at index H is unused (all zeroes),
10085 terminate the search: the signature is not present in the table.
10087 4) Let H = (H + H') modulo M. Repeat at Step 3.
10089 Because M > N and H' and M are relatively prime, the search is guaranteed
10090 to stop at an unused slot or find the match. */
10092 /* Create a hash table to map DWO IDs to their CU/TU entry in
10093 .debug_{info,types}.dwo in DWP_FILE.
10094 Returns NULL if there isn't one.
10095 Note: This function processes DWP files only, not DWO files. */
10097 static struct dwp_hash_table
*
10098 create_dwp_hash_table (struct dwp_file
*dwp_file
, int is_debug_types
)
10100 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10101 bfd
*dbfd
= dwp_file
->dbfd
;
10102 const gdb_byte
*index_ptr
, *index_end
;
10103 struct dwarf2_section_info
*index
;
10104 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
10105 struct dwp_hash_table
*htab
;
10107 if (is_debug_types
)
10108 index
= &dwp_file
->sections
.tu_index
;
10110 index
= &dwp_file
->sections
.cu_index
;
10112 if (dwarf2_section_empty_p (index
))
10114 dwarf2_read_section (objfile
, index
);
10116 index_ptr
= index
->buffer
;
10117 index_end
= index_ptr
+ index
->size
;
10119 version
= read_4_bytes (dbfd
, index_ptr
);
10122 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
10126 nr_units
= read_4_bytes (dbfd
, index_ptr
);
10128 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
10131 if (version
!= 1 && version
!= 2)
10133 error (_("Dwarf Error: unsupported DWP file version (%s)"
10134 " [in module %s]"),
10135 pulongest (version
), dwp_file
->name
);
10137 if (nr_slots
!= (nr_slots
& -nr_slots
))
10139 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
10140 " is not power of 2 [in module %s]"),
10141 pulongest (nr_slots
), dwp_file
->name
);
10144 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
10145 htab
->version
= version
;
10146 htab
->nr_columns
= nr_columns
;
10147 htab
->nr_units
= nr_units
;
10148 htab
->nr_slots
= nr_slots
;
10149 htab
->hash_table
= index_ptr
;
10150 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
10152 /* Exit early if the table is empty. */
10153 if (nr_slots
== 0 || nr_units
== 0
10154 || (version
== 2 && nr_columns
== 0))
10156 /* All must be zero. */
10157 if (nr_slots
!= 0 || nr_units
!= 0
10158 || (version
== 2 && nr_columns
!= 0))
10160 complaint (&symfile_complaints
,
10161 _("Empty DWP but nr_slots,nr_units,nr_columns not"
10162 " all zero [in modules %s]"),
10170 htab
->section_pool
.v1
.indices
=
10171 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
10172 /* It's harder to decide whether the section is too small in v1.
10173 V1 is deprecated anyway so we punt. */
10177 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
10178 int *ids
= htab
->section_pool
.v2
.section_ids
;
10179 /* Reverse map for error checking. */
10180 int ids_seen
[DW_SECT_MAX
+ 1];
10183 if (nr_columns
< 2)
10185 error (_("Dwarf Error: bad DWP hash table, too few columns"
10186 " in section table [in module %s]"),
10189 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
10191 error (_("Dwarf Error: bad DWP hash table, too many columns"
10192 " in section table [in module %s]"),
10195 memset (ids
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
10196 memset (ids_seen
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
10197 for (i
= 0; i
< nr_columns
; ++i
)
10199 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
10201 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
10203 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
10204 " in section table [in module %s]"),
10205 id
, dwp_file
->name
);
10207 if (ids_seen
[id
] != -1)
10209 error (_("Dwarf Error: bad DWP hash table, duplicate section"
10210 " id %d in section table [in module %s]"),
10211 id
, dwp_file
->name
);
10216 /* Must have exactly one info or types section. */
10217 if (((ids_seen
[DW_SECT_INFO
] != -1)
10218 + (ids_seen
[DW_SECT_TYPES
] != -1))
10221 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
10222 " DWO info/types section [in module %s]"),
10225 /* Must have an abbrev section. */
10226 if (ids_seen
[DW_SECT_ABBREV
] == -1)
10228 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
10229 " section [in module %s]"),
10232 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
10233 htab
->section_pool
.v2
.sizes
=
10234 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
10235 * nr_units
* nr_columns
);
10236 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
10237 * nr_units
* nr_columns
))
10240 error (_("Dwarf Error: DWP index section is corrupt (too small)"
10241 " [in module %s]"),
10249 /* Update SECTIONS with the data from SECTP.
10251 This function is like the other "locate" section routines that are
10252 passed to bfd_map_over_sections, but in this context the sections to
10253 read comes from the DWP V1 hash table, not the full ELF section table.
10255 The result is non-zero for success, or zero if an error was found. */
10258 locate_v1_virtual_dwo_sections (asection
*sectp
,
10259 struct virtual_v1_dwo_sections
*sections
)
10261 const struct dwop_section_names
*names
= &dwop_section_names
;
10263 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10265 /* There can be only one. */
10266 if (sections
->abbrev
.s
.section
!= NULL
)
10268 sections
->abbrev
.s
.section
= sectp
;
10269 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
10271 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
10272 || section_is_p (sectp
->name
, &names
->types_dwo
))
10274 /* There can be only one. */
10275 if (sections
->info_or_types
.s
.section
!= NULL
)
10277 sections
->info_or_types
.s
.section
= sectp
;
10278 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
10280 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10282 /* There can be only one. */
10283 if (sections
->line
.s
.section
!= NULL
)
10285 sections
->line
.s
.section
= sectp
;
10286 sections
->line
.size
= bfd_get_section_size (sectp
);
10288 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10290 /* There can be only one. */
10291 if (sections
->loc
.s
.section
!= NULL
)
10293 sections
->loc
.s
.section
= sectp
;
10294 sections
->loc
.size
= bfd_get_section_size (sectp
);
10296 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10298 /* There can be only one. */
10299 if (sections
->macinfo
.s
.section
!= NULL
)
10301 sections
->macinfo
.s
.section
= sectp
;
10302 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
10304 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10306 /* There can be only one. */
10307 if (sections
->macro
.s
.section
!= NULL
)
10309 sections
->macro
.s
.section
= sectp
;
10310 sections
->macro
.size
= bfd_get_section_size (sectp
);
10312 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10314 /* There can be only one. */
10315 if (sections
->str_offsets
.s
.section
!= NULL
)
10317 sections
->str_offsets
.s
.section
= sectp
;
10318 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
10322 /* No other kind of section is valid. */
10329 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
10330 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
10331 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
10332 This is for DWP version 1 files. */
10334 static struct dwo_unit
*
10335 create_dwo_unit_in_dwp_v1 (struct dwp_file
*dwp_file
,
10336 uint32_t unit_index
,
10337 const char *comp_dir
,
10338 ULONGEST signature
, int is_debug_types
)
10340 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10341 const struct dwp_hash_table
*dwp_htab
=
10342 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10343 bfd
*dbfd
= dwp_file
->dbfd
;
10344 const char *kind
= is_debug_types
? "TU" : "CU";
10345 struct dwo_file
*dwo_file
;
10346 struct dwo_unit
*dwo_unit
;
10347 struct virtual_v1_dwo_sections sections
;
10348 void **dwo_file_slot
;
10349 char *virtual_dwo_name
;
10350 struct cleanup
*cleanups
;
10353 gdb_assert (dwp_file
->version
== 1);
10355 if (dwarf_read_debug
)
10357 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
10359 pulongest (unit_index
), hex_string (signature
),
10363 /* Fetch the sections of this DWO unit.
10364 Put a limit on the number of sections we look for so that bad data
10365 doesn't cause us to loop forever. */
10367 #define MAX_NR_V1_DWO_SECTIONS \
10368 (1 /* .debug_info or .debug_types */ \
10369 + 1 /* .debug_abbrev */ \
10370 + 1 /* .debug_line */ \
10371 + 1 /* .debug_loc */ \
10372 + 1 /* .debug_str_offsets */ \
10373 + 1 /* .debug_macro or .debug_macinfo */ \
10374 + 1 /* trailing zero */)
10376 memset (§ions
, 0, sizeof (sections
));
10377 cleanups
= make_cleanup (null_cleanup
, 0);
10379 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
10382 uint32_t section_nr
=
10383 read_4_bytes (dbfd
,
10384 dwp_htab
->section_pool
.v1
.indices
10385 + (unit_index
+ i
) * sizeof (uint32_t));
10387 if (section_nr
== 0)
10389 if (section_nr
>= dwp_file
->num_sections
)
10391 error (_("Dwarf Error: bad DWP hash table, section number too large"
10392 " [in module %s]"),
10396 sectp
= dwp_file
->elf_sections
[section_nr
];
10397 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
10399 error (_("Dwarf Error: bad DWP hash table, invalid section found"
10400 " [in module %s]"),
10406 || dwarf2_section_empty_p (§ions
.info_or_types
)
10407 || dwarf2_section_empty_p (§ions
.abbrev
))
10409 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
10410 " [in module %s]"),
10413 if (i
== MAX_NR_V1_DWO_SECTIONS
)
10415 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
10416 " [in module %s]"),
10420 /* It's easier for the rest of the code if we fake a struct dwo_file and
10421 have dwo_unit "live" in that. At least for now.
10423 The DWP file can be made up of a random collection of CUs and TUs.
10424 However, for each CU + set of TUs that came from the same original DWO
10425 file, we can combine them back into a virtual DWO file to save space
10426 (fewer struct dwo_file objects to allocate). Remember that for really
10427 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10430 xstrprintf ("virtual-dwo/%d-%d-%d-%d",
10431 get_section_id (§ions
.abbrev
),
10432 get_section_id (§ions
.line
),
10433 get_section_id (§ions
.loc
),
10434 get_section_id (§ions
.str_offsets
));
10435 make_cleanup (xfree
, virtual_dwo_name
);
10436 /* Can we use an existing virtual DWO file? */
10437 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
10438 /* Create one if necessary. */
10439 if (*dwo_file_slot
== NULL
)
10441 if (dwarf_read_debug
)
10443 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
10446 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10448 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
10450 strlen (virtual_dwo_name
));
10451 dwo_file
->comp_dir
= comp_dir
;
10452 dwo_file
->sections
.abbrev
= sections
.abbrev
;
10453 dwo_file
->sections
.line
= sections
.line
;
10454 dwo_file
->sections
.loc
= sections
.loc
;
10455 dwo_file
->sections
.macinfo
= sections
.macinfo
;
10456 dwo_file
->sections
.macro
= sections
.macro
;
10457 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
10458 /* The "str" section is global to the entire DWP file. */
10459 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10460 /* The info or types section is assigned below to dwo_unit,
10461 there's no need to record it in dwo_file.
10462 Also, we can't simply record type sections in dwo_file because
10463 we record a pointer into the vector in dwo_unit. As we collect more
10464 types we'll grow the vector and eventually have to reallocate space
10465 for it, invalidating all copies of pointers into the previous
10467 *dwo_file_slot
= dwo_file
;
10471 if (dwarf_read_debug
)
10473 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10476 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
10478 do_cleanups (cleanups
);
10480 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10481 dwo_unit
->dwo_file
= dwo_file
;
10482 dwo_unit
->signature
= signature
;
10483 dwo_unit
->section
=
10484 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
10485 *dwo_unit
->section
= sections
.info_or_types
;
10486 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10491 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
10492 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
10493 piece within that section used by a TU/CU, return a virtual section
10494 of just that piece. */
10496 static struct dwarf2_section_info
10497 create_dwp_v2_section (struct dwarf2_section_info
*section
,
10498 bfd_size_type offset
, bfd_size_type size
)
10500 struct dwarf2_section_info result
;
10503 gdb_assert (section
!= NULL
);
10504 gdb_assert (!section
->is_virtual
);
10506 memset (&result
, 0, sizeof (result
));
10507 result
.s
.containing_section
= section
;
10508 result
.is_virtual
= 1;
10513 sectp
= get_section_bfd_section (section
);
10515 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
10516 bounds of the real section. This is a pretty-rare event, so just
10517 flag an error (easier) instead of a warning and trying to cope. */
10519 || offset
+ size
> bfd_get_section_size (sectp
))
10521 bfd
*abfd
= sectp
->owner
;
10523 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
10524 " in section %s [in module %s]"),
10525 sectp
? bfd_section_name (abfd
, sectp
) : "<unknown>",
10526 objfile_name (dwarf2_per_objfile
->objfile
));
10529 result
.virtual_offset
= offset
;
10530 result
.size
= size
;
10534 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
10535 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
10536 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
10537 This is for DWP version 2 files. */
10539 static struct dwo_unit
*
10540 create_dwo_unit_in_dwp_v2 (struct dwp_file
*dwp_file
,
10541 uint32_t unit_index
,
10542 const char *comp_dir
,
10543 ULONGEST signature
, int is_debug_types
)
10545 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10546 const struct dwp_hash_table
*dwp_htab
=
10547 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10548 bfd
*dbfd
= dwp_file
->dbfd
;
10549 const char *kind
= is_debug_types
? "TU" : "CU";
10550 struct dwo_file
*dwo_file
;
10551 struct dwo_unit
*dwo_unit
;
10552 struct virtual_v2_dwo_sections sections
;
10553 void **dwo_file_slot
;
10554 char *virtual_dwo_name
;
10555 struct cleanup
*cleanups
;
10558 gdb_assert (dwp_file
->version
== 2);
10560 if (dwarf_read_debug
)
10562 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
10564 pulongest (unit_index
), hex_string (signature
),
10568 /* Fetch the section offsets of this DWO unit. */
10570 memset (§ions
, 0, sizeof (sections
));
10571 cleanups
= make_cleanup (null_cleanup
, 0);
10573 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
10575 uint32_t offset
= read_4_bytes (dbfd
,
10576 dwp_htab
->section_pool
.v2
.offsets
10577 + (((unit_index
- 1) * dwp_htab
->nr_columns
10579 * sizeof (uint32_t)));
10580 uint32_t size
= read_4_bytes (dbfd
,
10581 dwp_htab
->section_pool
.v2
.sizes
10582 + (((unit_index
- 1) * dwp_htab
->nr_columns
10584 * sizeof (uint32_t)));
10586 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
10589 case DW_SECT_TYPES
:
10590 sections
.info_or_types_offset
= offset
;
10591 sections
.info_or_types_size
= size
;
10593 case DW_SECT_ABBREV
:
10594 sections
.abbrev_offset
= offset
;
10595 sections
.abbrev_size
= size
;
10598 sections
.line_offset
= offset
;
10599 sections
.line_size
= size
;
10602 sections
.loc_offset
= offset
;
10603 sections
.loc_size
= size
;
10605 case DW_SECT_STR_OFFSETS
:
10606 sections
.str_offsets_offset
= offset
;
10607 sections
.str_offsets_size
= size
;
10609 case DW_SECT_MACINFO
:
10610 sections
.macinfo_offset
= offset
;
10611 sections
.macinfo_size
= size
;
10613 case DW_SECT_MACRO
:
10614 sections
.macro_offset
= offset
;
10615 sections
.macro_size
= size
;
10620 /* It's easier for the rest of the code if we fake a struct dwo_file and
10621 have dwo_unit "live" in that. At least for now.
10623 The DWP file can be made up of a random collection of CUs and TUs.
10624 However, for each CU + set of TUs that came from the same original DWO
10625 file, we can combine them back into a virtual DWO file to save space
10626 (fewer struct dwo_file objects to allocate). Remember that for really
10627 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10630 xstrprintf ("virtual-dwo/%ld-%ld-%ld-%ld",
10631 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
10632 (long) (sections
.line_size
? sections
.line_offset
: 0),
10633 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
10634 (long) (sections
.str_offsets_size
10635 ? sections
.str_offsets_offset
: 0));
10636 make_cleanup (xfree
, virtual_dwo_name
);
10637 /* Can we use an existing virtual DWO file? */
10638 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
10639 /* Create one if necessary. */
10640 if (*dwo_file_slot
== NULL
)
10642 if (dwarf_read_debug
)
10644 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
10647 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10649 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
10651 strlen (virtual_dwo_name
));
10652 dwo_file
->comp_dir
= comp_dir
;
10653 dwo_file
->sections
.abbrev
=
10654 create_dwp_v2_section (&dwp_file
->sections
.abbrev
,
10655 sections
.abbrev_offset
, sections
.abbrev_size
);
10656 dwo_file
->sections
.line
=
10657 create_dwp_v2_section (&dwp_file
->sections
.line
,
10658 sections
.line_offset
, sections
.line_size
);
10659 dwo_file
->sections
.loc
=
10660 create_dwp_v2_section (&dwp_file
->sections
.loc
,
10661 sections
.loc_offset
, sections
.loc_size
);
10662 dwo_file
->sections
.macinfo
=
10663 create_dwp_v2_section (&dwp_file
->sections
.macinfo
,
10664 sections
.macinfo_offset
, sections
.macinfo_size
);
10665 dwo_file
->sections
.macro
=
10666 create_dwp_v2_section (&dwp_file
->sections
.macro
,
10667 sections
.macro_offset
, sections
.macro_size
);
10668 dwo_file
->sections
.str_offsets
=
10669 create_dwp_v2_section (&dwp_file
->sections
.str_offsets
,
10670 sections
.str_offsets_offset
,
10671 sections
.str_offsets_size
);
10672 /* The "str" section is global to the entire DWP file. */
10673 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10674 /* The info or types section is assigned below to dwo_unit,
10675 there's no need to record it in dwo_file.
10676 Also, we can't simply record type sections in dwo_file because
10677 we record a pointer into the vector in dwo_unit. As we collect more
10678 types we'll grow the vector and eventually have to reallocate space
10679 for it, invalidating all copies of pointers into the previous
10681 *dwo_file_slot
= dwo_file
;
10685 if (dwarf_read_debug
)
10687 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10690 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
10692 do_cleanups (cleanups
);
10694 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10695 dwo_unit
->dwo_file
= dwo_file
;
10696 dwo_unit
->signature
= signature
;
10697 dwo_unit
->section
=
10698 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
10699 *dwo_unit
->section
= create_dwp_v2_section (is_debug_types
10700 ? &dwp_file
->sections
.types
10701 : &dwp_file
->sections
.info
,
10702 sections
.info_or_types_offset
,
10703 sections
.info_or_types_size
);
10704 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10709 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
10710 Returns NULL if the signature isn't found. */
10712 static struct dwo_unit
*
10713 lookup_dwo_unit_in_dwp (struct dwp_file
*dwp_file
, const char *comp_dir
,
10714 ULONGEST signature
, int is_debug_types
)
10716 const struct dwp_hash_table
*dwp_htab
=
10717 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10718 bfd
*dbfd
= dwp_file
->dbfd
;
10719 uint32_t mask
= dwp_htab
->nr_slots
- 1;
10720 uint32_t hash
= signature
& mask
;
10721 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
10724 struct dwo_unit find_dwo_cu
;
10726 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
10727 find_dwo_cu
.signature
= signature
;
10728 slot
= htab_find_slot (is_debug_types
10729 ? dwp_file
->loaded_tus
10730 : dwp_file
->loaded_cus
,
10731 &find_dwo_cu
, INSERT
);
10734 return (struct dwo_unit
*) *slot
;
10736 /* Use a for loop so that we don't loop forever on bad debug info. */
10737 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
10739 ULONGEST signature_in_table
;
10741 signature_in_table
=
10742 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
10743 if (signature_in_table
== signature
)
10745 uint32_t unit_index
=
10746 read_4_bytes (dbfd
,
10747 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
10749 if (dwp_file
->version
== 1)
10751 *slot
= create_dwo_unit_in_dwp_v1 (dwp_file
, unit_index
,
10752 comp_dir
, signature
,
10757 *slot
= create_dwo_unit_in_dwp_v2 (dwp_file
, unit_index
,
10758 comp_dir
, signature
,
10761 return (struct dwo_unit
*) *slot
;
10763 if (signature_in_table
== 0)
10765 hash
= (hash
+ hash2
) & mask
;
10768 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
10769 " [in module %s]"),
10773 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
10774 Open the file specified by FILE_NAME and hand it off to BFD for
10775 preliminary analysis. Return a newly initialized bfd *, which
10776 includes a canonicalized copy of FILE_NAME.
10777 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
10778 SEARCH_CWD is true if the current directory is to be searched.
10779 It will be searched before debug-file-directory.
10780 If successful, the file is added to the bfd include table of the
10781 objfile's bfd (see gdb_bfd_record_inclusion).
10782 If unable to find/open the file, return NULL.
10783 NOTE: This function is derived from symfile_bfd_open. */
10785 static gdb_bfd_ref_ptr
10786 try_open_dwop_file (const char *file_name
, int is_dwp
, int search_cwd
)
10789 char *absolute_name
;
10790 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
10791 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
10792 to debug_file_directory. */
10794 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
10798 if (*debug_file_directory
!= '\0')
10799 search_path
= concat (".", dirname_separator_string
,
10800 debug_file_directory
, (char *) NULL
);
10802 search_path
= xstrdup (".");
10805 search_path
= xstrdup (debug_file_directory
);
10807 flags
= OPF_RETURN_REALPATH
;
10809 flags
|= OPF_SEARCH_IN_PATH
;
10810 desc
= openp (search_path
, flags
, file_name
,
10811 O_RDONLY
| O_BINARY
, &absolute_name
);
10812 xfree (search_path
);
10816 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (absolute_name
, gnutarget
, desc
));
10817 xfree (absolute_name
);
10818 if (sym_bfd
== NULL
)
10820 bfd_set_cacheable (sym_bfd
.get (), 1);
10822 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
10825 /* Success. Record the bfd as having been included by the objfile's bfd.
10826 This is important because things like demangled_names_hash lives in the
10827 objfile's per_bfd space and may have references to things like symbol
10828 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
10829 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
.get ());
10834 /* Try to open DWO file FILE_NAME.
10835 COMP_DIR is the DW_AT_comp_dir attribute.
10836 The result is the bfd handle of the file.
10837 If there is a problem finding or opening the file, return NULL.
10838 Upon success, the canonicalized path of the file is stored in the bfd,
10839 same as symfile_bfd_open. */
10841 static gdb_bfd_ref_ptr
10842 open_dwo_file (const char *file_name
, const char *comp_dir
)
10844 if (IS_ABSOLUTE_PATH (file_name
))
10845 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 0 /*search_cwd*/);
10847 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
10849 if (comp_dir
!= NULL
)
10851 char *path_to_try
= concat (comp_dir
, SLASH_STRING
,
10852 file_name
, (char *) NULL
);
10854 /* NOTE: If comp_dir is a relative path, this will also try the
10855 search path, which seems useful. */
10856 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (path_to_try
, 0 /*is_dwp*/,
10857 1 /*search_cwd*/));
10858 xfree (path_to_try
);
10863 /* That didn't work, try debug-file-directory, which, despite its name,
10864 is a list of paths. */
10866 if (*debug_file_directory
== '\0')
10869 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 1 /*search_cwd*/);
10872 /* This function is mapped across the sections and remembers the offset and
10873 size of each of the DWO debugging sections we are interested in. */
10876 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
10878 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
10879 const struct dwop_section_names
*names
= &dwop_section_names
;
10881 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10883 dwo_sections
->abbrev
.s
.section
= sectp
;
10884 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
10886 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
10888 dwo_sections
->info
.s
.section
= sectp
;
10889 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
10891 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10893 dwo_sections
->line
.s
.section
= sectp
;
10894 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
10896 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10898 dwo_sections
->loc
.s
.section
= sectp
;
10899 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
10901 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10903 dwo_sections
->macinfo
.s
.section
= sectp
;
10904 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
10906 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10908 dwo_sections
->macro
.s
.section
= sectp
;
10909 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
10911 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
10913 dwo_sections
->str
.s
.section
= sectp
;
10914 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
10916 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10918 dwo_sections
->str_offsets
.s
.section
= sectp
;
10919 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
10921 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
10923 struct dwarf2_section_info type_section
;
10925 memset (&type_section
, 0, sizeof (type_section
));
10926 type_section
.s
.section
= sectp
;
10927 type_section
.size
= bfd_get_section_size (sectp
);
10928 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
10933 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
10934 by PER_CU. This is for the non-DWP case.
10935 The result is NULL if DWO_NAME can't be found. */
10937 static struct dwo_file
*
10938 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
10939 const char *dwo_name
, const char *comp_dir
)
10941 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10942 struct dwo_file
*dwo_file
;
10943 struct cleanup
*cleanups
;
10945 gdb_bfd_ref_ptr
dbfd (open_dwo_file (dwo_name
, comp_dir
));
10948 if (dwarf_read_debug
)
10949 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
10952 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10953 dwo_file
->dwo_name
= dwo_name
;
10954 dwo_file
->comp_dir
= comp_dir
;
10955 dwo_file
->dbfd
= dbfd
.release ();
10957 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwo_file
);
10959 bfd_map_over_sections (dwo_file
->dbfd
, dwarf2_locate_dwo_sections
,
10960 &dwo_file
->sections
);
10962 create_cus_hash_table (*dwo_file
, dwo_file
->sections
.info
, dwo_file
->cus
);
10964 create_debug_types_hash_table (dwo_file
, dwo_file
->sections
.types
,
10967 discard_cleanups (cleanups
);
10969 if (dwarf_read_debug
)
10970 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
10975 /* This function is mapped across the sections and remembers the offset and
10976 size of each of the DWP debugging sections common to version 1 and 2 that
10977 we are interested in. */
10980 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
10981 void *dwp_file_ptr
)
10983 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
10984 const struct dwop_section_names
*names
= &dwop_section_names
;
10985 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
10987 /* Record the ELF section number for later lookup: this is what the
10988 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10989 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
10990 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
10992 /* Look for specific sections that we need. */
10993 if (section_is_p (sectp
->name
, &names
->str_dwo
))
10995 dwp_file
->sections
.str
.s
.section
= sectp
;
10996 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
10998 else if (section_is_p (sectp
->name
, &names
->cu_index
))
11000 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
11001 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
11003 else if (section_is_p (sectp
->name
, &names
->tu_index
))
11005 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
11006 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
11010 /* This function is mapped across the sections and remembers the offset and
11011 size of each of the DWP version 2 debugging sections that we are interested
11012 in. This is split into a separate function because we don't know if we
11013 have version 1 or 2 until we parse the cu_index/tu_index sections. */
11016 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
11018 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
11019 const struct dwop_section_names
*names
= &dwop_section_names
;
11020 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
11022 /* Record the ELF section number for later lookup: this is what the
11023 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
11024 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
11025 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
11027 /* Look for specific sections that we need. */
11028 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
11030 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
11031 dwp_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
11033 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
11035 dwp_file
->sections
.info
.s
.section
= sectp
;
11036 dwp_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
11038 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
11040 dwp_file
->sections
.line
.s
.section
= sectp
;
11041 dwp_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
11043 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
11045 dwp_file
->sections
.loc
.s
.section
= sectp
;
11046 dwp_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
11048 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
11050 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
11051 dwp_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
11053 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
11055 dwp_file
->sections
.macro
.s
.section
= sectp
;
11056 dwp_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
11058 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
11060 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
11061 dwp_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
11063 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
11065 dwp_file
->sections
.types
.s
.section
= sectp
;
11066 dwp_file
->sections
.types
.size
= bfd_get_section_size (sectp
);
11070 /* Hash function for dwp_file loaded CUs/TUs. */
11073 hash_dwp_loaded_cutus (const void *item
)
11075 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
11077 /* This drops the top 32 bits of the signature, but is ok for a hash. */
11078 return dwo_unit
->signature
;
11081 /* Equality function for dwp_file loaded CUs/TUs. */
11084 eq_dwp_loaded_cutus (const void *a
, const void *b
)
11086 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
11087 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
11089 return dua
->signature
== dub
->signature
;
11092 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
11095 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
11097 return htab_create_alloc_ex (3,
11098 hash_dwp_loaded_cutus
,
11099 eq_dwp_loaded_cutus
,
11101 &objfile
->objfile_obstack
,
11102 hashtab_obstack_allocate
,
11103 dummy_obstack_deallocate
);
11106 /* Try to open DWP file FILE_NAME.
11107 The result is the bfd handle of the file.
11108 If there is a problem finding or opening the file, return NULL.
11109 Upon success, the canonicalized path of the file is stored in the bfd,
11110 same as symfile_bfd_open. */
11112 static gdb_bfd_ref_ptr
11113 open_dwp_file (const char *file_name
)
11115 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (file_name
, 1 /*is_dwp*/,
11116 1 /*search_cwd*/));
11120 /* Work around upstream bug 15652.
11121 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
11122 [Whether that's a "bug" is debatable, but it is getting in our way.]
11123 We have no real idea where the dwp file is, because gdb's realpath-ing
11124 of the executable's path may have discarded the needed info.
11125 [IWBN if the dwp file name was recorded in the executable, akin to
11126 .gnu_debuglink, but that doesn't exist yet.]
11127 Strip the directory from FILE_NAME and search again. */
11128 if (*debug_file_directory
!= '\0')
11130 /* Don't implicitly search the current directory here.
11131 If the user wants to search "." to handle this case,
11132 it must be added to debug-file-directory. */
11133 return try_open_dwop_file (lbasename (file_name
), 1 /*is_dwp*/,
11140 /* Initialize the use of the DWP file for the current objfile.
11141 By convention the name of the DWP file is ${objfile}.dwp.
11142 The result is NULL if it can't be found. */
11144 static struct dwp_file
*
11145 open_and_init_dwp_file (void)
11147 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11148 struct dwp_file
*dwp_file
;
11150 /* Try to find first .dwp for the binary file before any symbolic links
11153 /* If the objfile is a debug file, find the name of the real binary
11154 file and get the name of dwp file from there. */
11155 std::string dwp_name
;
11156 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
11158 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
11159 const char *backlink_basename
= lbasename (backlink
->original_name
);
11161 dwp_name
= ldirname (objfile
->original_name
) + SLASH_STRING
+ backlink_basename
;
11164 dwp_name
= objfile
->original_name
;
11166 dwp_name
+= ".dwp";
11168 gdb_bfd_ref_ptr
dbfd (open_dwp_file (dwp_name
.c_str ()));
11170 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
11172 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
11173 dwp_name
= objfile_name (objfile
);
11174 dwp_name
+= ".dwp";
11175 dbfd
= open_dwp_file (dwp_name
.c_str ());
11180 if (dwarf_read_debug
)
11181 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
.c_str ());
11184 dwp_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_file
);
11185 dwp_file
->name
= bfd_get_filename (dbfd
.get ());
11186 dwp_file
->dbfd
= dbfd
.release ();
11188 /* +1: section 0 is unused */
11189 dwp_file
->num_sections
= bfd_count_sections (dwp_file
->dbfd
) + 1;
11190 dwp_file
->elf_sections
=
11191 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
11192 dwp_file
->num_sections
, asection
*);
11194 bfd_map_over_sections (dwp_file
->dbfd
, dwarf2_locate_common_dwp_sections
,
11197 dwp_file
->cus
= create_dwp_hash_table (dwp_file
, 0);
11199 dwp_file
->tus
= create_dwp_hash_table (dwp_file
, 1);
11201 /* The DWP file version is stored in the hash table. Oh well. */
11202 if (dwp_file
->cus
&& dwp_file
->tus
11203 && dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
11205 /* Technically speaking, we should try to limp along, but this is
11206 pretty bizarre. We use pulongest here because that's the established
11207 portability solution (e.g, we cannot use %u for uint32_t). */
11208 error (_("Dwarf Error: DWP file CU version %s doesn't match"
11209 " TU version %s [in DWP file %s]"),
11210 pulongest (dwp_file
->cus
->version
),
11211 pulongest (dwp_file
->tus
->version
), dwp_name
.c_str ());
11215 dwp_file
->version
= dwp_file
->cus
->version
;
11216 else if (dwp_file
->tus
)
11217 dwp_file
->version
= dwp_file
->tus
->version
;
11219 dwp_file
->version
= 2;
11221 if (dwp_file
->version
== 2)
11222 bfd_map_over_sections (dwp_file
->dbfd
, dwarf2_locate_v2_dwp_sections
,
11225 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
11226 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
11228 if (dwarf_read_debug
)
11230 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
11231 fprintf_unfiltered (gdb_stdlog
,
11232 " %s CUs, %s TUs\n",
11233 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
11234 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
11240 /* Wrapper around open_and_init_dwp_file, only open it once. */
11242 static struct dwp_file
*
11243 get_dwp_file (void)
11245 if (! dwarf2_per_objfile
->dwp_checked
)
11247 dwarf2_per_objfile
->dwp_file
= open_and_init_dwp_file ();
11248 dwarf2_per_objfile
->dwp_checked
= 1;
11250 return dwarf2_per_objfile
->dwp_file
;
11253 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
11254 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
11255 or in the DWP file for the objfile, referenced by THIS_UNIT.
11256 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
11257 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
11259 This is called, for example, when wanting to read a variable with a
11260 complex location. Therefore we don't want to do file i/o for every call.
11261 Therefore we don't want to look for a DWO file on every call.
11262 Therefore we first see if we've already seen SIGNATURE in a DWP file,
11263 then we check if we've already seen DWO_NAME, and only THEN do we check
11266 The result is a pointer to the dwo_unit object or NULL if we didn't find it
11267 (dwo_id mismatch or couldn't find the DWO/DWP file). */
11269 static struct dwo_unit
*
11270 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
11271 const char *dwo_name
, const char *comp_dir
,
11272 ULONGEST signature
, int is_debug_types
)
11274 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11275 const char *kind
= is_debug_types
? "TU" : "CU";
11276 void **dwo_file_slot
;
11277 struct dwo_file
*dwo_file
;
11278 struct dwp_file
*dwp_file
;
11280 /* First see if there's a DWP file.
11281 If we have a DWP file but didn't find the DWO inside it, don't
11282 look for the original DWO file. It makes gdb behave differently
11283 depending on whether one is debugging in the build tree. */
11285 dwp_file
= get_dwp_file ();
11286 if (dwp_file
!= NULL
)
11288 const struct dwp_hash_table
*dwp_htab
=
11289 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
11291 if (dwp_htab
!= NULL
)
11293 struct dwo_unit
*dwo_cutu
=
11294 lookup_dwo_unit_in_dwp (dwp_file
, comp_dir
,
11295 signature
, is_debug_types
);
11297 if (dwo_cutu
!= NULL
)
11299 if (dwarf_read_debug
)
11301 fprintf_unfiltered (gdb_stdlog
,
11302 "Virtual DWO %s %s found: @%s\n",
11303 kind
, hex_string (signature
),
11304 host_address_to_string (dwo_cutu
));
11312 /* No DWP file, look for the DWO file. */
11314 dwo_file_slot
= lookup_dwo_file_slot (dwo_name
, comp_dir
);
11315 if (*dwo_file_slot
== NULL
)
11317 /* Read in the file and build a table of the CUs/TUs it contains. */
11318 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
11320 /* NOTE: This will be NULL if unable to open the file. */
11321 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
11323 if (dwo_file
!= NULL
)
11325 struct dwo_unit
*dwo_cutu
= NULL
;
11327 if (is_debug_types
&& dwo_file
->tus
)
11329 struct dwo_unit find_dwo_cutu
;
11331 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
11332 find_dwo_cutu
.signature
= signature
;
11334 = (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_cutu
);
11336 else if (!is_debug_types
&& dwo_file
->cus
)
11338 struct dwo_unit find_dwo_cutu
;
11340 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
11341 find_dwo_cutu
.signature
= signature
;
11342 dwo_cutu
= (struct dwo_unit
*)htab_find (dwo_file
->cus
,
11346 if (dwo_cutu
!= NULL
)
11348 if (dwarf_read_debug
)
11350 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
11351 kind
, dwo_name
, hex_string (signature
),
11352 host_address_to_string (dwo_cutu
));
11359 /* We didn't find it. This could mean a dwo_id mismatch, or
11360 someone deleted the DWO/DWP file, or the search path isn't set up
11361 correctly to find the file. */
11363 if (dwarf_read_debug
)
11365 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
11366 kind
, dwo_name
, hex_string (signature
));
11369 /* This is a warning and not a complaint because it can be caused by
11370 pilot error (e.g., user accidentally deleting the DWO). */
11372 /* Print the name of the DWP file if we looked there, helps the user
11373 better diagnose the problem. */
11374 char *dwp_text
= NULL
;
11375 struct cleanup
*cleanups
;
11377 if (dwp_file
!= NULL
)
11378 dwp_text
= xstrprintf (" [in DWP file %s]", lbasename (dwp_file
->name
));
11379 cleanups
= make_cleanup (xfree
, dwp_text
);
11381 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x"
11382 " [in module %s]"),
11383 kind
, dwo_name
, hex_string (signature
),
11384 dwp_text
!= NULL
? dwp_text
: "",
11385 this_unit
->is_debug_types
? "TU" : "CU",
11386 to_underlying (this_unit
->sect_off
), objfile_name (objfile
));
11388 do_cleanups (cleanups
);
11393 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
11394 See lookup_dwo_cutu_unit for details. */
11396 static struct dwo_unit
*
11397 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
11398 const char *dwo_name
, const char *comp_dir
,
11399 ULONGEST signature
)
11401 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
11404 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
11405 See lookup_dwo_cutu_unit for details. */
11407 static struct dwo_unit
*
11408 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
11409 const char *dwo_name
, const char *comp_dir
)
11411 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
11414 /* Traversal function for queue_and_load_all_dwo_tus. */
11417 queue_and_load_dwo_tu (void **slot
, void *info
)
11419 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
11420 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
11421 ULONGEST signature
= dwo_unit
->signature
;
11422 struct signatured_type
*sig_type
=
11423 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
11425 if (sig_type
!= NULL
)
11427 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
11429 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
11430 a real dependency of PER_CU on SIG_TYPE. That is detected later
11431 while processing PER_CU. */
11432 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
11433 load_full_type_unit (sig_cu
);
11434 VEC_safe_push (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, sig_cu
);
11440 /* Queue all TUs contained in the DWO of PER_CU to be read in.
11441 The DWO may have the only definition of the type, though it may not be
11442 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
11443 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
11446 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
11448 struct dwo_unit
*dwo_unit
;
11449 struct dwo_file
*dwo_file
;
11451 gdb_assert (!per_cu
->is_debug_types
);
11452 gdb_assert (get_dwp_file () == NULL
);
11453 gdb_assert (per_cu
->cu
!= NULL
);
11455 dwo_unit
= per_cu
->cu
->dwo_unit
;
11456 gdb_assert (dwo_unit
!= NULL
);
11458 dwo_file
= dwo_unit
->dwo_file
;
11459 if (dwo_file
->tus
!= NULL
)
11460 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
11463 /* Free all resources associated with DWO_FILE.
11464 Close the DWO file and munmap the sections.
11465 All memory should be on the objfile obstack. */
11468 free_dwo_file (struct dwo_file
*dwo_file
, struct objfile
*objfile
)
11471 /* Note: dbfd is NULL for virtual DWO files. */
11472 gdb_bfd_unref (dwo_file
->dbfd
);
11474 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
11477 /* Wrapper for free_dwo_file for use in cleanups. */
11480 free_dwo_file_cleanup (void *arg
)
11482 struct dwo_file
*dwo_file
= (struct dwo_file
*) arg
;
11483 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11485 free_dwo_file (dwo_file
, objfile
);
11488 /* Traversal function for free_dwo_files. */
11491 free_dwo_file_from_slot (void **slot
, void *info
)
11493 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
11494 struct objfile
*objfile
= (struct objfile
*) info
;
11496 free_dwo_file (dwo_file
, objfile
);
11501 /* Free all resources associated with DWO_FILES. */
11504 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
11506 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
11509 /* Read in various DIEs. */
11511 /* qsort helper for inherit_abstract_dies. */
11514 unsigned_int_compar (const void *ap
, const void *bp
)
11516 unsigned int a
= *(unsigned int *) ap
;
11517 unsigned int b
= *(unsigned int *) bp
;
11519 return (a
> b
) - (b
> a
);
11522 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
11523 Inherit only the children of the DW_AT_abstract_origin DIE not being
11524 already referenced by DW_AT_abstract_origin from the children of the
11528 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
11530 struct die_info
*child_die
;
11531 unsigned die_children_count
;
11532 /* CU offsets which were referenced by children of the current DIE. */
11533 sect_offset
*offsets
;
11534 sect_offset
*offsets_end
, *offsetp
;
11535 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
11536 struct die_info
*origin_die
;
11537 /* Iterator of the ORIGIN_DIE children. */
11538 struct die_info
*origin_child_die
;
11539 struct cleanup
*cleanups
;
11540 struct attribute
*attr
;
11541 struct dwarf2_cu
*origin_cu
;
11542 struct pending
**origin_previous_list_in_scope
;
11544 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
11548 /* Note that following die references may follow to a die in a
11552 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
11554 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
11556 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
11557 origin_cu
->list_in_scope
= cu
->list_in_scope
;
11559 if (die
->tag
!= origin_die
->tag
11560 && !(die
->tag
== DW_TAG_inlined_subroutine
11561 && origin_die
->tag
== DW_TAG_subprogram
))
11562 complaint (&symfile_complaints
,
11563 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
11564 to_underlying (die
->sect_off
),
11565 to_underlying (origin_die
->sect_off
));
11567 child_die
= die
->child
;
11568 die_children_count
= 0;
11569 while (child_die
&& child_die
->tag
)
11571 child_die
= sibling_die (child_die
);
11572 die_children_count
++;
11574 offsets
= XNEWVEC (sect_offset
, die_children_count
);
11575 cleanups
= make_cleanup (xfree
, offsets
);
11577 offsets_end
= offsets
;
11578 for (child_die
= die
->child
;
11579 child_die
&& child_die
->tag
;
11580 child_die
= sibling_die (child_die
))
11582 struct die_info
*child_origin_die
;
11583 struct dwarf2_cu
*child_origin_cu
;
11585 /* We are trying to process concrete instance entries:
11586 DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
11587 it's not relevant to our analysis here. i.e. detecting DIEs that are
11588 present in the abstract instance but not referenced in the concrete
11590 if (child_die
->tag
== DW_TAG_call_site
11591 || child_die
->tag
== DW_TAG_GNU_call_site
)
11594 /* For each CHILD_DIE, find the corresponding child of
11595 ORIGIN_DIE. If there is more than one layer of
11596 DW_AT_abstract_origin, follow them all; there shouldn't be,
11597 but GCC versions at least through 4.4 generate this (GCC PR
11599 child_origin_die
= child_die
;
11600 child_origin_cu
= cu
;
11603 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
11607 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
11611 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
11612 counterpart may exist. */
11613 if (child_origin_die
!= child_die
)
11615 if (child_die
->tag
!= child_origin_die
->tag
11616 && !(child_die
->tag
== DW_TAG_inlined_subroutine
11617 && child_origin_die
->tag
== DW_TAG_subprogram
))
11618 complaint (&symfile_complaints
,
11619 _("Child DIE 0x%x and its abstract origin 0x%x have "
11621 to_underlying (child_die
->sect_off
),
11622 to_underlying (child_origin_die
->sect_off
));
11623 if (child_origin_die
->parent
!= origin_die
)
11624 complaint (&symfile_complaints
,
11625 _("Child DIE 0x%x and its abstract origin 0x%x have "
11626 "different parents"),
11627 to_underlying (child_die
->sect_off
),
11628 to_underlying (child_origin_die
->sect_off
));
11630 *offsets_end
++ = child_origin_die
->sect_off
;
11633 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
11634 unsigned_int_compar
);
11635 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
11636 if (offsetp
[-1] == *offsetp
)
11637 complaint (&symfile_complaints
,
11638 _("Multiple children of DIE 0x%x refer "
11639 "to DIE 0x%x as their abstract origin"),
11640 to_underlying (die
->sect_off
), to_underlying (*offsetp
));
11643 origin_child_die
= origin_die
->child
;
11644 while (origin_child_die
&& origin_child_die
->tag
)
11646 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
11647 while (offsetp
< offsets_end
11648 && *offsetp
< origin_child_die
->sect_off
)
11650 if (offsetp
>= offsets_end
11651 || *offsetp
> origin_child_die
->sect_off
)
11653 /* Found that ORIGIN_CHILD_DIE is really not referenced.
11654 Check whether we're already processing ORIGIN_CHILD_DIE.
11655 This can happen with mutually referenced abstract_origins.
11657 if (!origin_child_die
->in_process
)
11658 process_die (origin_child_die
, origin_cu
);
11660 origin_child_die
= sibling_die (origin_child_die
);
11662 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
11664 do_cleanups (cleanups
);
11668 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11670 struct objfile
*objfile
= cu
->objfile
;
11671 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11672 struct context_stack
*newobj
;
11675 struct die_info
*child_die
;
11676 struct attribute
*attr
, *call_line
, *call_file
;
11678 CORE_ADDR baseaddr
;
11679 struct block
*block
;
11680 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
11681 VEC (symbolp
) *template_args
= NULL
;
11682 struct template_symbol
*templ_func
= NULL
;
11686 /* If we do not have call site information, we can't show the
11687 caller of this inlined function. That's too confusing, so
11688 only use the scope for local variables. */
11689 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
11690 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
11691 if (call_line
== NULL
|| call_file
== NULL
)
11693 read_lexical_block_scope (die
, cu
);
11698 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11700 name
= dwarf2_name (die
, cu
);
11702 /* Ignore functions with missing or empty names. These are actually
11703 illegal according to the DWARF standard. */
11706 complaint (&symfile_complaints
,
11707 _("missing name for subprogram DIE at %d"),
11708 to_underlying (die
->sect_off
));
11712 /* Ignore functions with missing or invalid low and high pc attributes. */
11713 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
11714 <= PC_BOUNDS_INVALID
)
11716 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
11717 if (!attr
|| !DW_UNSND (attr
))
11718 complaint (&symfile_complaints
,
11719 _("cannot get low and high bounds "
11720 "for subprogram DIE at %d"),
11721 to_underlying (die
->sect_off
));
11725 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11726 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
11728 /* If we have any template arguments, then we must allocate a
11729 different sort of symbol. */
11730 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
11732 if (child_die
->tag
== DW_TAG_template_type_param
11733 || child_die
->tag
== DW_TAG_template_value_param
)
11735 templ_func
= allocate_template_symbol (objfile
);
11736 templ_func
->base
.is_cplus_template_function
= 1;
11741 newobj
= push_context (0, lowpc
);
11742 newobj
->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
11743 (struct symbol
*) templ_func
);
11745 /* If there is a location expression for DW_AT_frame_base, record
11747 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
11749 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
11751 /* If there is a location for the static link, record it. */
11752 newobj
->static_link
= NULL
;
11753 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
11756 newobj
->static_link
11757 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
11758 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
);
11761 cu
->list_in_scope
= &local_symbols
;
11763 if (die
->child
!= NULL
)
11765 child_die
= die
->child
;
11766 while (child_die
&& child_die
->tag
)
11768 if (child_die
->tag
== DW_TAG_template_type_param
11769 || child_die
->tag
== DW_TAG_template_value_param
)
11771 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
11774 VEC_safe_push (symbolp
, template_args
, arg
);
11777 process_die (child_die
, cu
);
11778 child_die
= sibling_die (child_die
);
11782 inherit_abstract_dies (die
, cu
);
11784 /* If we have a DW_AT_specification, we might need to import using
11785 directives from the context of the specification DIE. See the
11786 comment in determine_prefix. */
11787 if (cu
->language
== language_cplus
11788 && dwarf2_attr (die
, DW_AT_specification
, cu
))
11790 struct dwarf2_cu
*spec_cu
= cu
;
11791 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
11795 child_die
= spec_die
->child
;
11796 while (child_die
&& child_die
->tag
)
11798 if (child_die
->tag
== DW_TAG_imported_module
)
11799 process_die (child_die
, spec_cu
);
11800 child_die
= sibling_die (child_die
);
11803 /* In some cases, GCC generates specification DIEs that
11804 themselves contain DW_AT_specification attributes. */
11805 spec_die
= die_specification (spec_die
, &spec_cu
);
11809 newobj
= pop_context ();
11810 /* Make a block for the local symbols within. */
11811 block
= finish_block (newobj
->name
, &local_symbols
, newobj
->old_blocks
,
11812 newobj
->static_link
, lowpc
, highpc
);
11814 /* For C++, set the block's scope. */
11815 if ((cu
->language
== language_cplus
11816 || cu
->language
== language_fortran
11817 || cu
->language
== language_d
11818 || cu
->language
== language_rust
)
11819 && cu
->processing_has_namespace_info
)
11820 block_set_scope (block
, determine_prefix (die
, cu
),
11821 &objfile
->objfile_obstack
);
11823 /* If we have address ranges, record them. */
11824 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11826 gdbarch_make_symbol_special (gdbarch
, newobj
->name
, objfile
);
11828 /* Attach template arguments to function. */
11829 if (! VEC_empty (symbolp
, template_args
))
11831 gdb_assert (templ_func
!= NULL
);
11833 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
11834 templ_func
->template_arguments
11835 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
11836 templ_func
->n_template_arguments
);
11837 memcpy (templ_func
->template_arguments
,
11838 VEC_address (symbolp
, template_args
),
11839 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
11840 VEC_free (symbolp
, template_args
);
11843 /* In C++, we can have functions nested inside functions (e.g., when
11844 a function declares a class that has methods). This means that
11845 when we finish processing a function scope, we may need to go
11846 back to building a containing block's symbol lists. */
11847 local_symbols
= newobj
->locals
;
11848 local_using_directives
= newobj
->local_using_directives
;
11850 /* If we've finished processing a top-level function, subsequent
11851 symbols go in the file symbol list. */
11852 if (outermost_context_p ())
11853 cu
->list_in_scope
= &file_symbols
;
11856 /* Process all the DIES contained within a lexical block scope. Start
11857 a new scope, process the dies, and then close the scope. */
11860 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11862 struct objfile
*objfile
= cu
->objfile
;
11863 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11864 struct context_stack
*newobj
;
11865 CORE_ADDR lowpc
, highpc
;
11866 struct die_info
*child_die
;
11867 CORE_ADDR baseaddr
;
11869 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11871 /* Ignore blocks with missing or invalid low and high pc attributes. */
11872 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
11873 as multiple lexical blocks? Handling children in a sane way would
11874 be nasty. Might be easier to properly extend generic blocks to
11875 describe ranges. */
11876 switch (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
11878 case PC_BOUNDS_NOT_PRESENT
:
11879 /* DW_TAG_lexical_block has no attributes, process its children as if
11880 there was no wrapping by that DW_TAG_lexical_block.
11881 GCC does no longer produces such DWARF since GCC r224161. */
11882 for (child_die
= die
->child
;
11883 child_die
!= NULL
&& child_die
->tag
;
11884 child_die
= sibling_die (child_die
))
11885 process_die (child_die
, cu
);
11887 case PC_BOUNDS_INVALID
:
11890 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11891 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
11893 push_context (0, lowpc
);
11894 if (die
->child
!= NULL
)
11896 child_die
= die
->child
;
11897 while (child_die
&& child_die
->tag
)
11899 process_die (child_die
, cu
);
11900 child_die
= sibling_die (child_die
);
11903 inherit_abstract_dies (die
, cu
);
11904 newobj
= pop_context ();
11906 if (local_symbols
!= NULL
|| local_using_directives
!= NULL
)
11908 struct block
*block
11909 = finish_block (0, &local_symbols
, newobj
->old_blocks
, NULL
,
11910 newobj
->start_addr
, highpc
);
11912 /* Note that recording ranges after traversing children, as we
11913 do here, means that recording a parent's ranges entails
11914 walking across all its children's ranges as they appear in
11915 the address map, which is quadratic behavior.
11917 It would be nicer to record the parent's ranges before
11918 traversing its children, simply overriding whatever you find
11919 there. But since we don't even decide whether to create a
11920 block until after we've traversed its children, that's hard
11922 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11924 local_symbols
= newobj
->locals
;
11925 local_using_directives
= newobj
->local_using_directives
;
11928 /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */
11931 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11933 struct objfile
*objfile
= cu
->objfile
;
11934 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11935 CORE_ADDR pc
, baseaddr
;
11936 struct attribute
*attr
;
11937 struct call_site
*call_site
, call_site_local
;
11940 struct die_info
*child_die
;
11942 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11944 attr
= dwarf2_attr (die
, DW_AT_call_return_pc
, cu
);
11947 /* This was a pre-DWARF-5 GNU extension alias
11948 for DW_AT_call_return_pc. */
11949 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
11953 complaint (&symfile_complaints
,
11954 _("missing DW_AT_call_return_pc for DW_TAG_call_site "
11955 "DIE 0x%x [in module %s]"),
11956 to_underlying (die
->sect_off
), objfile_name (objfile
));
11959 pc
= attr_value_as_address (attr
) + baseaddr
;
11960 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
11962 if (cu
->call_site_htab
== NULL
)
11963 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
11964 NULL
, &objfile
->objfile_obstack
,
11965 hashtab_obstack_allocate
, NULL
);
11966 call_site_local
.pc
= pc
;
11967 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
11970 complaint (&symfile_complaints
,
11971 _("Duplicate PC %s for DW_TAG_call_site "
11972 "DIE 0x%x [in module %s]"),
11973 paddress (gdbarch
, pc
), to_underlying (die
->sect_off
),
11974 objfile_name (objfile
));
11978 /* Count parameters at the caller. */
11981 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
11982 child_die
= sibling_die (child_die
))
11984 if (child_die
->tag
!= DW_TAG_call_site_parameter
11985 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11987 complaint (&symfile_complaints
,
11988 _("Tag %d is not DW_TAG_call_site_parameter in "
11989 "DW_TAG_call_site child DIE 0x%x [in module %s]"),
11990 child_die
->tag
, to_underlying (child_die
->sect_off
),
11991 objfile_name (objfile
));
11999 = ((struct call_site
*)
12000 obstack_alloc (&objfile
->objfile_obstack
,
12001 sizeof (*call_site
)
12002 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
12004 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
12005 call_site
->pc
= pc
;
12007 if (dwarf2_flag_true_p (die
, DW_AT_call_tail_call
, cu
)
12008 || dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
12010 struct die_info
*func_die
;
12012 /* Skip also over DW_TAG_inlined_subroutine. */
12013 for (func_die
= die
->parent
;
12014 func_die
&& func_die
->tag
!= DW_TAG_subprogram
12015 && func_die
->tag
!= DW_TAG_subroutine_type
;
12016 func_die
= func_die
->parent
);
12018 /* DW_AT_call_all_calls is a superset
12019 of DW_AT_call_all_tail_calls. */
12021 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_calls
, cu
)
12022 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
12023 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_tail_calls
, cu
)
12024 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
12026 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
12027 not complete. But keep CALL_SITE for look ups via call_site_htab,
12028 both the initial caller containing the real return address PC and
12029 the final callee containing the current PC of a chain of tail
12030 calls do not need to have the tail call list complete. But any
12031 function candidate for a virtual tail call frame searched via
12032 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
12033 determined unambiguously. */
12037 struct type
*func_type
= NULL
;
12040 func_type
= get_die_type (func_die
, cu
);
12041 if (func_type
!= NULL
)
12043 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
12045 /* Enlist this call site to the function. */
12046 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
12047 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
12050 complaint (&symfile_complaints
,
12051 _("Cannot find function owning DW_TAG_call_site "
12052 "DIE 0x%x [in module %s]"),
12053 to_underlying (die
->sect_off
), objfile_name (objfile
));
12057 attr
= dwarf2_attr (die
, DW_AT_call_target
, cu
);
12059 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
12061 attr
= dwarf2_attr (die
, DW_AT_call_origin
, cu
);
12064 /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */
12065 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
12067 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
12068 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
12069 /* Keep NULL DWARF_BLOCK. */;
12070 else if (attr_form_is_block (attr
))
12072 struct dwarf2_locexpr_baton
*dlbaton
;
12074 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
12075 dlbaton
->data
= DW_BLOCK (attr
)->data
;
12076 dlbaton
->size
= DW_BLOCK (attr
)->size
;
12077 dlbaton
->per_cu
= cu
->per_cu
;
12079 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
12081 else if (attr_form_is_ref (attr
))
12083 struct dwarf2_cu
*target_cu
= cu
;
12084 struct die_info
*target_die
;
12086 target_die
= follow_die_ref (die
, attr
, &target_cu
);
12087 gdb_assert (target_cu
->objfile
== objfile
);
12088 if (die_is_declaration (target_die
, target_cu
))
12090 const char *target_physname
;
12092 /* Prefer the mangled name; otherwise compute the demangled one. */
12093 target_physname
= dw2_linkage_name (target_die
, target_cu
);
12094 if (target_physname
== NULL
)
12095 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
12096 if (target_physname
== NULL
)
12097 complaint (&symfile_complaints
,
12098 _("DW_AT_call_target target DIE has invalid "
12099 "physname, for referencing DIE 0x%x [in module %s]"),
12100 to_underlying (die
->sect_off
), objfile_name (objfile
));
12102 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
12108 /* DW_AT_entry_pc should be preferred. */
12109 if (dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
)
12110 <= PC_BOUNDS_INVALID
)
12111 complaint (&symfile_complaints
,
12112 _("DW_AT_call_target target DIE has invalid "
12113 "low pc, for referencing DIE 0x%x [in module %s]"),
12114 to_underlying (die
->sect_off
), objfile_name (objfile
));
12117 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
12118 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
12123 complaint (&symfile_complaints
,
12124 _("DW_TAG_call_site DW_AT_call_target is neither "
12125 "block nor reference, for DIE 0x%x [in module %s]"),
12126 to_underlying (die
->sect_off
), objfile_name (objfile
));
12128 call_site
->per_cu
= cu
->per_cu
;
12130 for (child_die
= die
->child
;
12131 child_die
&& child_die
->tag
;
12132 child_die
= sibling_die (child_die
))
12134 struct call_site_parameter
*parameter
;
12135 struct attribute
*loc
, *origin
;
12137 if (child_die
->tag
!= DW_TAG_call_site_parameter
12138 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
12140 /* Already printed the complaint above. */
12144 gdb_assert (call_site
->parameter_count
< nparams
);
12145 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
12147 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
12148 specifies DW_TAG_formal_parameter. Value of the data assumed for the
12149 register is contained in DW_AT_call_value. */
12151 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
12152 origin
= dwarf2_attr (child_die
, DW_AT_call_parameter
, cu
);
12153 if (origin
== NULL
)
12155 /* This was a pre-DWARF-5 GNU extension alias
12156 for DW_AT_call_parameter. */
12157 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
12159 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
12161 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
12163 sect_offset sect_off
12164 = (sect_offset
) dwarf2_get_ref_die_offset (origin
);
12165 if (!offset_in_cu_p (&cu
->header
, sect_off
))
12167 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
12168 binding can be done only inside one CU. Such referenced DIE
12169 therefore cannot be even moved to DW_TAG_partial_unit. */
12170 complaint (&symfile_complaints
,
12171 _("DW_AT_call_parameter offset is not in CU for "
12172 "DW_TAG_call_site child DIE 0x%x [in module %s]"),
12173 to_underlying (child_die
->sect_off
),
12174 objfile_name (objfile
));
12177 parameter
->u
.param_cu_off
12178 = (cu_offset
) (sect_off
- cu
->header
.sect_off
);
12180 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
12182 complaint (&symfile_complaints
,
12183 _("No DW_FORM_block* DW_AT_location for "
12184 "DW_TAG_call_site child DIE 0x%x [in module %s]"),
12185 to_underlying (child_die
->sect_off
), objfile_name (objfile
));
12190 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
12191 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
12192 if (parameter
->u
.dwarf_reg
!= -1)
12193 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
12194 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
12195 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
12196 ¶meter
->u
.fb_offset
))
12197 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
12200 complaint (&symfile_complaints
,
12201 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
12202 "for DW_FORM_block* DW_AT_location is supported for "
12203 "DW_TAG_call_site child DIE 0x%x "
12205 to_underlying (child_die
->sect_off
),
12206 objfile_name (objfile
));
12211 attr
= dwarf2_attr (child_die
, DW_AT_call_value
, cu
);
12213 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
12214 if (!attr_form_is_block (attr
))
12216 complaint (&symfile_complaints
,
12217 _("No DW_FORM_block* DW_AT_call_value for "
12218 "DW_TAG_call_site child DIE 0x%x [in module %s]"),
12219 to_underlying (child_die
->sect_off
),
12220 objfile_name (objfile
));
12223 parameter
->value
= DW_BLOCK (attr
)->data
;
12224 parameter
->value_size
= DW_BLOCK (attr
)->size
;
12226 /* Parameters are not pre-cleared by memset above. */
12227 parameter
->data_value
= NULL
;
12228 parameter
->data_value_size
= 0;
12229 call_site
->parameter_count
++;
12231 attr
= dwarf2_attr (child_die
, DW_AT_call_data_value
, cu
);
12233 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
12236 if (!attr_form_is_block (attr
))
12237 complaint (&symfile_complaints
,
12238 _("No DW_FORM_block* DW_AT_call_data_value for "
12239 "DW_TAG_call_site child DIE 0x%x [in module %s]"),
12240 to_underlying (child_die
->sect_off
),
12241 objfile_name (objfile
));
12244 parameter
->data_value
= DW_BLOCK (attr
)->data
;
12245 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
12251 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET
12252 reading .debug_rnglists.
12253 Callback's type should be:
12254 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
12255 Return true if the attributes are present and valid, otherwise,
12258 template <typename Callback
>
12260 dwarf2_rnglists_process (unsigned offset
, struct dwarf2_cu
*cu
,
12261 Callback
&&callback
)
12263 struct objfile
*objfile
= cu
->objfile
;
12264 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12265 struct comp_unit_head
*cu_header
= &cu
->header
;
12266 bfd
*obfd
= objfile
->obfd
;
12267 unsigned int addr_size
= cu_header
->addr_size
;
12268 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
12269 /* Base address selection entry. */
12272 unsigned int dummy
;
12273 const gdb_byte
*buffer
;
12275 CORE_ADDR high
= 0;
12276 CORE_ADDR baseaddr
;
12277 bool overflow
= false;
12279 found_base
= cu
->base_known
;
12280 base
= cu
->base_address
;
12282 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->rnglists
);
12283 if (offset
>= dwarf2_per_objfile
->rnglists
.size
)
12285 complaint (&symfile_complaints
,
12286 _("Offset %d out of bounds for DW_AT_ranges attribute"),
12290 buffer
= dwarf2_per_objfile
->rnglists
.buffer
+ offset
;
12292 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
12296 /* Initialize it due to a false compiler warning. */
12297 CORE_ADDR range_beginning
= 0, range_end
= 0;
12298 const gdb_byte
*buf_end
= (dwarf2_per_objfile
->rnglists
.buffer
12299 + dwarf2_per_objfile
->rnglists
.size
);
12300 unsigned int bytes_read
;
12302 if (buffer
== buf_end
)
12307 const auto rlet
= static_cast<enum dwarf_range_list_entry
>(*buffer
++);
12310 case DW_RLE_end_of_list
:
12312 case DW_RLE_base_address
:
12313 if (buffer
+ cu
->header
.addr_size
> buf_end
)
12318 base
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12320 buffer
+= bytes_read
;
12322 case DW_RLE_start_length
:
12323 if (buffer
+ cu
->header
.addr_size
> buf_end
)
12328 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12329 buffer
+= bytes_read
;
12330 range_end
= (range_beginning
12331 + read_unsigned_leb128 (obfd
, buffer
, &bytes_read
));
12332 buffer
+= bytes_read
;
12333 if (buffer
> buf_end
)
12339 case DW_RLE_offset_pair
:
12340 range_beginning
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
12341 buffer
+= bytes_read
;
12342 if (buffer
> buf_end
)
12347 range_end
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
12348 buffer
+= bytes_read
;
12349 if (buffer
> buf_end
)
12355 case DW_RLE_start_end
:
12356 if (buffer
+ 2 * cu
->header
.addr_size
> buf_end
)
12361 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12362 buffer
+= bytes_read
;
12363 range_end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12364 buffer
+= bytes_read
;
12367 complaint (&symfile_complaints
,
12368 _("Invalid .debug_rnglists data (no base address)"));
12371 if (rlet
== DW_RLE_end_of_list
|| overflow
)
12373 if (rlet
== DW_RLE_base_address
)
12378 /* We have no valid base address for the ranges
12380 complaint (&symfile_complaints
,
12381 _("Invalid .debug_rnglists data (no base address)"));
12385 if (range_beginning
> range_end
)
12387 /* Inverted range entries are invalid. */
12388 complaint (&symfile_complaints
,
12389 _("Invalid .debug_rnglists data (inverted range)"));
12393 /* Empty range entries have no effect. */
12394 if (range_beginning
== range_end
)
12397 range_beginning
+= base
;
12400 /* A not-uncommon case of bad debug info.
12401 Don't pollute the addrmap with bad data. */
12402 if (range_beginning
+ baseaddr
== 0
12403 && !dwarf2_per_objfile
->has_section_at_zero
)
12405 complaint (&symfile_complaints
,
12406 _(".debug_rnglists entry has start address of zero"
12407 " [in module %s]"), objfile_name (objfile
));
12411 callback (range_beginning
, range_end
);
12416 complaint (&symfile_complaints
,
12417 _("Offset %d is not terminated "
12418 "for DW_AT_ranges attribute"),
12426 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges.
12427 Callback's type should be:
12428 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
12429 Return 1 if the attributes are present and valid, otherwise, return 0. */
12431 template <typename Callback
>
12433 dwarf2_ranges_process (unsigned offset
, struct dwarf2_cu
*cu
,
12434 Callback
&&callback
)
12436 struct objfile
*objfile
= cu
->objfile
;
12437 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12438 struct comp_unit_head
*cu_header
= &cu
->header
;
12439 bfd
*obfd
= objfile
->obfd
;
12440 unsigned int addr_size
= cu_header
->addr_size
;
12441 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
12442 /* Base address selection entry. */
12445 unsigned int dummy
;
12446 const gdb_byte
*buffer
;
12447 CORE_ADDR baseaddr
;
12449 if (cu_header
->version
>= 5)
12450 return dwarf2_rnglists_process (offset
, cu
, callback
);
12452 found_base
= cu
->base_known
;
12453 base
= cu
->base_address
;
12455 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
12456 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
12458 complaint (&symfile_complaints
,
12459 _("Offset %d out of bounds for DW_AT_ranges attribute"),
12463 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
12465 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
12469 CORE_ADDR range_beginning
, range_end
;
12471 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
12472 buffer
+= addr_size
;
12473 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
12474 buffer
+= addr_size
;
12475 offset
+= 2 * addr_size
;
12477 /* An end of list marker is a pair of zero addresses. */
12478 if (range_beginning
== 0 && range_end
== 0)
12479 /* Found the end of list entry. */
12482 /* Each base address selection entry is a pair of 2 values.
12483 The first is the largest possible address, the second is
12484 the base address. Check for a base address here. */
12485 if ((range_beginning
& mask
) == mask
)
12487 /* If we found the largest possible address, then we already
12488 have the base address in range_end. */
12496 /* We have no valid base address for the ranges
12498 complaint (&symfile_complaints
,
12499 _("Invalid .debug_ranges data (no base address)"));
12503 if (range_beginning
> range_end
)
12505 /* Inverted range entries are invalid. */
12506 complaint (&symfile_complaints
,
12507 _("Invalid .debug_ranges data (inverted range)"));
12511 /* Empty range entries have no effect. */
12512 if (range_beginning
== range_end
)
12515 range_beginning
+= base
;
12518 /* A not-uncommon case of bad debug info.
12519 Don't pollute the addrmap with bad data. */
12520 if (range_beginning
+ baseaddr
== 0
12521 && !dwarf2_per_objfile
->has_section_at_zero
)
12523 complaint (&symfile_complaints
,
12524 _(".debug_ranges entry has start address of zero"
12525 " [in module %s]"), objfile_name (objfile
));
12529 callback (range_beginning
, range_end
);
12535 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
12536 Return 1 if the attributes are present and valid, otherwise, return 0.
12537 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
12540 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
12541 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
12542 struct partial_symtab
*ranges_pst
)
12544 struct objfile
*objfile
= cu
->objfile
;
12545 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12546 const CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
12547 SECT_OFF_TEXT (objfile
));
12550 CORE_ADDR high
= 0;
12553 retval
= dwarf2_ranges_process (offset
, cu
,
12554 [&] (CORE_ADDR range_beginning
, CORE_ADDR range_end
)
12556 if (ranges_pst
!= NULL
)
12561 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
12562 range_beginning
+ baseaddr
);
12563 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
12564 range_end
+ baseaddr
);
12565 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
12569 /* FIXME: This is recording everything as a low-high
12570 segment of consecutive addresses. We should have a
12571 data structure for discontiguous block ranges
12575 low
= range_beginning
;
12581 if (range_beginning
< low
)
12582 low
= range_beginning
;
12583 if (range_end
> high
)
12591 /* If the first entry is an end-of-list marker, the range
12592 describes an empty scope, i.e. no instructions. */
12598 *high_return
= high
;
12602 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
12603 definition for the return value. *LOWPC and *HIGHPC are set iff
12604 neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */
12606 static enum pc_bounds_kind
12607 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
12608 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
12609 struct partial_symtab
*pst
)
12611 struct attribute
*attr
;
12612 struct attribute
*attr_high
;
12614 CORE_ADDR high
= 0;
12615 enum pc_bounds_kind ret
;
12617 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
12620 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
12623 low
= attr_value_as_address (attr
);
12624 high
= attr_value_as_address (attr_high
);
12625 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
12629 /* Found high w/o low attribute. */
12630 return PC_BOUNDS_INVALID
;
12632 /* Found consecutive range of addresses. */
12633 ret
= PC_BOUNDS_HIGH_LOW
;
12637 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
12640 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
12641 We take advantage of the fact that DW_AT_ranges does not appear
12642 in DW_TAG_compile_unit of DWO files. */
12643 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
12644 unsigned int ranges_offset
= (DW_UNSND (attr
)
12645 + (need_ranges_base
12649 /* Value of the DW_AT_ranges attribute is the offset in the
12650 .debug_ranges section. */
12651 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
12652 return PC_BOUNDS_INVALID
;
12653 /* Found discontinuous range of addresses. */
12654 ret
= PC_BOUNDS_RANGES
;
12657 return PC_BOUNDS_NOT_PRESENT
;
12660 /* read_partial_die has also the strict LOW < HIGH requirement. */
12662 return PC_BOUNDS_INVALID
;
12664 /* When using the GNU linker, .gnu.linkonce. sections are used to
12665 eliminate duplicate copies of functions and vtables and such.
12666 The linker will arbitrarily choose one and discard the others.
12667 The AT_*_pc values for such functions refer to local labels in
12668 these sections. If the section from that file was discarded, the
12669 labels are not in the output, so the relocs get a value of 0.
12670 If this is a discarded function, mark the pc bounds as invalid,
12671 so that GDB will ignore it. */
12672 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12673 return PC_BOUNDS_INVALID
;
12681 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
12682 its low and high PC addresses. Do nothing if these addresses could not
12683 be determined. Otherwise, set LOWPC to the low address if it is smaller,
12684 and HIGHPC to the high address if greater than HIGHPC. */
12687 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
12688 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
12689 struct dwarf2_cu
*cu
)
12691 CORE_ADDR low
, high
;
12692 struct die_info
*child
= die
->child
;
12694 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
) >= PC_BOUNDS_RANGES
)
12696 *lowpc
= std::min (*lowpc
, low
);
12697 *highpc
= std::max (*highpc
, high
);
12700 /* If the language does not allow nested subprograms (either inside
12701 subprograms or lexical blocks), we're done. */
12702 if (cu
->language
!= language_ada
)
12705 /* Check all the children of the given DIE. If it contains nested
12706 subprograms, then check their pc bounds. Likewise, we need to
12707 check lexical blocks as well, as they may also contain subprogram
12709 while (child
&& child
->tag
)
12711 if (child
->tag
== DW_TAG_subprogram
12712 || child
->tag
== DW_TAG_lexical_block
)
12713 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
12714 child
= sibling_die (child
);
12718 /* Get the low and high pc's represented by the scope DIE, and store
12719 them in *LOWPC and *HIGHPC. If the correct values can't be
12720 determined, set *LOWPC to -1 and *HIGHPC to 0. */
12723 get_scope_pc_bounds (struct die_info
*die
,
12724 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
12725 struct dwarf2_cu
*cu
)
12727 CORE_ADDR best_low
= (CORE_ADDR
) -1;
12728 CORE_ADDR best_high
= (CORE_ADDR
) 0;
12729 CORE_ADDR current_low
, current_high
;
12731 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
12732 >= PC_BOUNDS_RANGES
)
12734 best_low
= current_low
;
12735 best_high
= current_high
;
12739 struct die_info
*child
= die
->child
;
12741 while (child
&& child
->tag
)
12743 switch (child
->tag
) {
12744 case DW_TAG_subprogram
:
12745 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
12747 case DW_TAG_namespace
:
12748 case DW_TAG_module
:
12749 /* FIXME: carlton/2004-01-16: Should we do this for
12750 DW_TAG_class_type/DW_TAG_structure_type, too? I think
12751 that current GCC's always emit the DIEs corresponding
12752 to definitions of methods of classes as children of a
12753 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
12754 the DIEs giving the declarations, which could be
12755 anywhere). But I don't see any reason why the
12756 standards says that they have to be there. */
12757 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
12759 if (current_low
!= ((CORE_ADDR
) -1))
12761 best_low
= std::min (best_low
, current_low
);
12762 best_high
= std::max (best_high
, current_high
);
12770 child
= sibling_die (child
);
12775 *highpc
= best_high
;
12778 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
12782 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
12783 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
12785 struct objfile
*objfile
= cu
->objfile
;
12786 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12787 struct attribute
*attr
;
12788 struct attribute
*attr_high
;
12790 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
12793 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
12796 CORE_ADDR low
= attr_value_as_address (attr
);
12797 CORE_ADDR high
= attr_value_as_address (attr_high
);
12799 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
12802 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
12803 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
12804 record_block_range (block
, low
, high
- 1);
12808 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
12811 bfd
*obfd
= objfile
->obfd
;
12812 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
12813 We take advantage of the fact that DW_AT_ranges does not appear
12814 in DW_TAG_compile_unit of DWO files. */
12815 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
12817 /* The value of the DW_AT_ranges attribute is the offset of the
12818 address range list in the .debug_ranges section. */
12819 unsigned long offset
= (DW_UNSND (attr
)
12820 + (need_ranges_base
? cu
->ranges_base
: 0));
12821 const gdb_byte
*buffer
;
12823 /* For some target architectures, but not others, the
12824 read_address function sign-extends the addresses it returns.
12825 To recognize base address selection entries, we need a
12827 unsigned int addr_size
= cu
->header
.addr_size
;
12828 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
12830 /* The base address, to which the next pair is relative. Note
12831 that this 'base' is a DWARF concept: most entries in a range
12832 list are relative, to reduce the number of relocs against the
12833 debugging information. This is separate from this function's
12834 'baseaddr' argument, which GDB uses to relocate debugging
12835 information from a shared library based on the address at
12836 which the library was loaded. */
12837 CORE_ADDR base
= cu
->base_address
;
12838 int base_known
= cu
->base_known
;
12840 dwarf2_ranges_process (offset
, cu
,
12841 [&] (CORE_ADDR start
, CORE_ADDR end
)
12845 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
12846 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
12847 record_block_range (block
, start
, end
- 1);
12852 /* Check whether the producer field indicates either of GCC < 4.6, or the
12853 Intel C/C++ compiler, and cache the result in CU. */
12856 check_producer (struct dwarf2_cu
*cu
)
12860 if (cu
->producer
== NULL
)
12862 /* For unknown compilers expect their behavior is DWARF version
12865 GCC started to support .debug_types sections by -gdwarf-4 since
12866 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
12867 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
12868 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
12869 interpreted incorrectly by GDB now - GCC PR debug/48229. */
12871 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
12873 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
12874 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
12876 else if (producer_is_icc (cu
->producer
, &major
, &minor
))
12877 cu
->producer_is_icc_lt_14
= major
< 14;
12880 /* For other non-GCC compilers, expect their behavior is DWARF version
12884 cu
->checked_producer
= 1;
12887 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
12888 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
12889 during 4.6.0 experimental. */
12892 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
12894 if (!cu
->checked_producer
)
12895 check_producer (cu
);
12897 return cu
->producer_is_gxx_lt_4_6
;
12900 /* Return the default accessibility type if it is not overriden by
12901 DW_AT_accessibility. */
12903 static enum dwarf_access_attribute
12904 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
12906 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
12908 /* The default DWARF 2 accessibility for members is public, the default
12909 accessibility for inheritance is private. */
12911 if (die
->tag
!= DW_TAG_inheritance
)
12912 return DW_ACCESS_public
;
12914 return DW_ACCESS_private
;
12918 /* DWARF 3+ defines the default accessibility a different way. The same
12919 rules apply now for DW_TAG_inheritance as for the members and it only
12920 depends on the container kind. */
12922 if (die
->parent
->tag
== DW_TAG_class_type
)
12923 return DW_ACCESS_private
;
12925 return DW_ACCESS_public
;
12929 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
12930 offset. If the attribute was not found return 0, otherwise return
12931 1. If it was found but could not properly be handled, set *OFFSET
12935 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
12938 struct attribute
*attr
;
12940 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
12945 /* Note that we do not check for a section offset first here.
12946 This is because DW_AT_data_member_location is new in DWARF 4,
12947 so if we see it, we can assume that a constant form is really
12948 a constant and not a section offset. */
12949 if (attr_form_is_constant (attr
))
12950 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
12951 else if (attr_form_is_section_offset (attr
))
12952 dwarf2_complex_location_expr_complaint ();
12953 else if (attr_form_is_block (attr
))
12954 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12956 dwarf2_complex_location_expr_complaint ();
12964 /* Add an aggregate field to the field list. */
12967 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
12968 struct dwarf2_cu
*cu
)
12970 struct objfile
*objfile
= cu
->objfile
;
12971 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12972 struct nextfield
*new_field
;
12973 struct attribute
*attr
;
12975 const char *fieldname
= "";
12977 /* Allocate a new field list entry and link it in. */
12978 new_field
= XNEW (struct nextfield
);
12979 make_cleanup (xfree
, new_field
);
12980 memset (new_field
, 0, sizeof (struct nextfield
));
12982 if (die
->tag
== DW_TAG_inheritance
)
12984 new_field
->next
= fip
->baseclasses
;
12985 fip
->baseclasses
= new_field
;
12989 new_field
->next
= fip
->fields
;
12990 fip
->fields
= new_field
;
12994 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
12996 new_field
->accessibility
= DW_UNSND (attr
);
12998 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
12999 if (new_field
->accessibility
!= DW_ACCESS_public
)
13000 fip
->non_public_fields
= 1;
13002 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
13004 new_field
->virtuality
= DW_UNSND (attr
);
13006 new_field
->virtuality
= DW_VIRTUALITY_none
;
13008 fp
= &new_field
->field
;
13010 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
13014 /* Data member other than a C++ static data member. */
13016 /* Get type of field. */
13017 fp
->type
= die_type (die
, cu
);
13019 SET_FIELD_BITPOS (*fp
, 0);
13021 /* Get bit size of field (zero if none). */
13022 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
13025 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
13029 FIELD_BITSIZE (*fp
) = 0;
13032 /* Get bit offset of field. */
13033 if (handle_data_member_location (die
, cu
, &offset
))
13034 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
13035 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
13038 if (gdbarch_bits_big_endian (gdbarch
))
13040 /* For big endian bits, the DW_AT_bit_offset gives the
13041 additional bit offset from the MSB of the containing
13042 anonymous object to the MSB of the field. We don't
13043 have to do anything special since we don't need to
13044 know the size of the anonymous object. */
13045 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
13049 /* For little endian bits, compute the bit offset to the
13050 MSB of the anonymous object, subtract off the number of
13051 bits from the MSB of the field to the MSB of the
13052 object, and then subtract off the number of bits of
13053 the field itself. The result is the bit offset of
13054 the LSB of the field. */
13055 int anonymous_size
;
13056 int bit_offset
= DW_UNSND (attr
);
13058 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13061 /* The size of the anonymous object containing
13062 the bit field is explicit, so use the
13063 indicated size (in bytes). */
13064 anonymous_size
= DW_UNSND (attr
);
13068 /* The size of the anonymous object containing
13069 the bit field must be inferred from the type
13070 attribute of the data member containing the
13072 anonymous_size
= TYPE_LENGTH (fp
->type
);
13074 SET_FIELD_BITPOS (*fp
,
13075 (FIELD_BITPOS (*fp
)
13076 + anonymous_size
* bits_per_byte
13077 - bit_offset
- FIELD_BITSIZE (*fp
)));
13080 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
13082 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
13083 + dwarf2_get_attr_constant_value (attr
, 0)));
13085 /* Get name of field. */
13086 fieldname
= dwarf2_name (die
, cu
);
13087 if (fieldname
== NULL
)
13090 /* The name is already allocated along with this objfile, so we don't
13091 need to duplicate it for the type. */
13092 fp
->name
= fieldname
;
13094 /* Change accessibility for artificial fields (e.g. virtual table
13095 pointer or virtual base class pointer) to private. */
13096 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
13098 FIELD_ARTIFICIAL (*fp
) = 1;
13099 new_field
->accessibility
= DW_ACCESS_private
;
13100 fip
->non_public_fields
= 1;
13103 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
13105 /* C++ static member. */
13107 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
13108 is a declaration, but all versions of G++ as of this writing
13109 (so through at least 3.2.1) incorrectly generate
13110 DW_TAG_variable tags. */
13112 const char *physname
;
13114 /* Get name of field. */
13115 fieldname
= dwarf2_name (die
, cu
);
13116 if (fieldname
== NULL
)
13119 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
13121 /* Only create a symbol if this is an external value.
13122 new_symbol checks this and puts the value in the global symbol
13123 table, which we want. If it is not external, new_symbol
13124 will try to put the value in cu->list_in_scope which is wrong. */
13125 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
13127 /* A static const member, not much different than an enum as far as
13128 we're concerned, except that we can support more types. */
13129 new_symbol (die
, NULL
, cu
);
13132 /* Get physical name. */
13133 physname
= dwarf2_physname (fieldname
, die
, cu
);
13135 /* The name is already allocated along with this objfile, so we don't
13136 need to duplicate it for the type. */
13137 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
13138 FIELD_TYPE (*fp
) = die_type (die
, cu
);
13139 FIELD_NAME (*fp
) = fieldname
;
13141 else if (die
->tag
== DW_TAG_inheritance
)
13145 /* C++ base class field. */
13146 if (handle_data_member_location (die
, cu
, &offset
))
13147 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
13148 FIELD_BITSIZE (*fp
) = 0;
13149 FIELD_TYPE (*fp
) = die_type (die
, cu
);
13150 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
13151 fip
->nbaseclasses
++;
13155 /* Add a typedef defined in the scope of the FIP's class. */
13158 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
13159 struct dwarf2_cu
*cu
)
13161 struct typedef_field_list
*new_field
;
13162 struct typedef_field
*fp
;
13164 /* Allocate a new field list entry and link it in. */
13165 new_field
= XCNEW (struct typedef_field_list
);
13166 make_cleanup (xfree
, new_field
);
13168 gdb_assert (die
->tag
== DW_TAG_typedef
);
13170 fp
= &new_field
->field
;
13172 /* Get name of field. */
13173 fp
->name
= dwarf2_name (die
, cu
);
13174 if (fp
->name
== NULL
)
13177 fp
->type
= read_type_die (die
, cu
);
13179 new_field
->next
= fip
->typedef_field_list
;
13180 fip
->typedef_field_list
= new_field
;
13181 fip
->typedef_field_list_count
++;
13184 /* Create the vector of fields, and attach it to the type. */
13187 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
13188 struct dwarf2_cu
*cu
)
13190 int nfields
= fip
->nfields
;
13192 /* Record the field count, allocate space for the array of fields,
13193 and create blank accessibility bitfields if necessary. */
13194 TYPE_NFIELDS (type
) = nfields
;
13195 TYPE_FIELDS (type
) = (struct field
*)
13196 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
13197 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
13199 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
13201 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13203 TYPE_FIELD_PRIVATE_BITS (type
) =
13204 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
13205 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
13207 TYPE_FIELD_PROTECTED_BITS (type
) =
13208 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
13209 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
13211 TYPE_FIELD_IGNORE_BITS (type
) =
13212 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
13213 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
13216 /* If the type has baseclasses, allocate and clear a bit vector for
13217 TYPE_FIELD_VIRTUAL_BITS. */
13218 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
13220 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
13221 unsigned char *pointer
;
13223 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13224 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
13225 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
13226 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
13227 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
13230 /* Copy the saved-up fields into the field vector. Start from the head of
13231 the list, adding to the tail of the field array, so that they end up in
13232 the same order in the array in which they were added to the list. */
13233 while (nfields
-- > 0)
13235 struct nextfield
*fieldp
;
13239 fieldp
= fip
->fields
;
13240 fip
->fields
= fieldp
->next
;
13244 fieldp
= fip
->baseclasses
;
13245 fip
->baseclasses
= fieldp
->next
;
13248 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
13249 switch (fieldp
->accessibility
)
13251 case DW_ACCESS_private
:
13252 if (cu
->language
!= language_ada
)
13253 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
13256 case DW_ACCESS_protected
:
13257 if (cu
->language
!= language_ada
)
13258 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
13261 case DW_ACCESS_public
:
13265 /* Unknown accessibility. Complain and treat it as public. */
13267 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
13268 fieldp
->accessibility
);
13272 if (nfields
< fip
->nbaseclasses
)
13274 switch (fieldp
->virtuality
)
13276 case DW_VIRTUALITY_virtual
:
13277 case DW_VIRTUALITY_pure_virtual
:
13278 if (cu
->language
== language_ada
)
13279 error (_("unexpected virtuality in component of Ada type"));
13280 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
13287 /* Return true if this member function is a constructor, false
13291 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
13293 const char *fieldname
;
13294 const char *type_name
;
13297 if (die
->parent
== NULL
)
13300 if (die
->parent
->tag
!= DW_TAG_structure_type
13301 && die
->parent
->tag
!= DW_TAG_union_type
13302 && die
->parent
->tag
!= DW_TAG_class_type
)
13305 fieldname
= dwarf2_name (die
, cu
);
13306 type_name
= dwarf2_name (die
->parent
, cu
);
13307 if (fieldname
== NULL
|| type_name
== NULL
)
13310 len
= strlen (fieldname
);
13311 return (strncmp (fieldname
, type_name
, len
) == 0
13312 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
13315 /* Add a member function to the proper fieldlist. */
13318 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
13319 struct type
*type
, struct dwarf2_cu
*cu
)
13321 struct objfile
*objfile
= cu
->objfile
;
13322 struct attribute
*attr
;
13323 struct fnfieldlist
*flp
;
13325 struct fn_field
*fnp
;
13326 const char *fieldname
;
13327 struct nextfnfield
*new_fnfield
;
13328 struct type
*this_type
;
13329 enum dwarf_access_attribute accessibility
;
13331 if (cu
->language
== language_ada
)
13332 error (_("unexpected member function in Ada type"));
13334 /* Get name of member function. */
13335 fieldname
= dwarf2_name (die
, cu
);
13336 if (fieldname
== NULL
)
13339 /* Look up member function name in fieldlist. */
13340 for (i
= 0; i
< fip
->nfnfields
; i
++)
13342 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
13346 /* Create new list element if necessary. */
13347 if (i
< fip
->nfnfields
)
13348 flp
= &fip
->fnfieldlists
[i
];
13351 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
13353 fip
->fnfieldlists
= (struct fnfieldlist
*)
13354 xrealloc (fip
->fnfieldlists
,
13355 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
13356 * sizeof (struct fnfieldlist
));
13357 if (fip
->nfnfields
== 0)
13358 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
13360 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
13361 flp
->name
= fieldname
;
13364 i
= fip
->nfnfields
++;
13367 /* Create a new member function field and chain it to the field list
13369 new_fnfield
= XNEW (struct nextfnfield
);
13370 make_cleanup (xfree
, new_fnfield
);
13371 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
13372 new_fnfield
->next
= flp
->head
;
13373 flp
->head
= new_fnfield
;
13376 /* Fill in the member function field info. */
13377 fnp
= &new_fnfield
->fnfield
;
13379 /* Delay processing of the physname until later. */
13380 if (cu
->language
== language_cplus
)
13382 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
13387 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
13388 fnp
->physname
= physname
? physname
: "";
13391 fnp
->type
= alloc_type (objfile
);
13392 this_type
= read_type_die (die
, cu
);
13393 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
13395 int nparams
= TYPE_NFIELDS (this_type
);
13397 /* TYPE is the domain of this method, and THIS_TYPE is the type
13398 of the method itself (TYPE_CODE_METHOD). */
13399 smash_to_method_type (fnp
->type
, type
,
13400 TYPE_TARGET_TYPE (this_type
),
13401 TYPE_FIELDS (this_type
),
13402 TYPE_NFIELDS (this_type
),
13403 TYPE_VARARGS (this_type
));
13405 /* Handle static member functions.
13406 Dwarf2 has no clean way to discern C++ static and non-static
13407 member functions. G++ helps GDB by marking the first
13408 parameter for non-static member functions (which is the this
13409 pointer) as artificial. We obtain this information from
13410 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
13411 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
13412 fnp
->voffset
= VOFFSET_STATIC
;
13415 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
13416 dwarf2_full_name (fieldname
, die
, cu
));
13418 /* Get fcontext from DW_AT_containing_type if present. */
13419 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
13420 fnp
->fcontext
= die_containing_type (die
, cu
);
13422 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
13423 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
13425 /* Get accessibility. */
13426 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
13428 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
13430 accessibility
= dwarf2_default_access_attribute (die
, cu
);
13431 switch (accessibility
)
13433 case DW_ACCESS_private
:
13434 fnp
->is_private
= 1;
13436 case DW_ACCESS_protected
:
13437 fnp
->is_protected
= 1;
13441 /* Check for artificial methods. */
13442 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
13443 if (attr
&& DW_UNSND (attr
) != 0)
13444 fnp
->is_artificial
= 1;
13446 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
13448 /* Get index in virtual function table if it is a virtual member
13449 function. For older versions of GCC, this is an offset in the
13450 appropriate virtual table, as specified by DW_AT_containing_type.
13451 For everyone else, it is an expression to be evaluated relative
13452 to the object address. */
13454 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
13457 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
13459 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
13461 /* Old-style GCC. */
13462 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
13464 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
13465 || (DW_BLOCK (attr
)->size
> 1
13466 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
13467 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
13469 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
13470 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
13471 dwarf2_complex_location_expr_complaint ();
13473 fnp
->voffset
/= cu
->header
.addr_size
;
13477 dwarf2_complex_location_expr_complaint ();
13479 if (!fnp
->fcontext
)
13481 /* If there is no `this' field and no DW_AT_containing_type,
13482 we cannot actually find a base class context for the
13484 if (TYPE_NFIELDS (this_type
) == 0
13485 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
13487 complaint (&symfile_complaints
,
13488 _("cannot determine context for virtual member "
13489 "function \"%s\" (offset %d)"),
13490 fieldname
, to_underlying (die
->sect_off
));
13495 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
13499 else if (attr_form_is_section_offset (attr
))
13501 dwarf2_complex_location_expr_complaint ();
13505 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
13511 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
13512 if (attr
&& DW_UNSND (attr
))
13514 /* GCC does this, as of 2008-08-25; PR debug/37237. */
13515 complaint (&symfile_complaints
,
13516 _("Member function \"%s\" (offset %d) is virtual "
13517 "but the vtable offset is not specified"),
13518 fieldname
, to_underlying (die
->sect_off
));
13519 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13520 TYPE_CPLUS_DYNAMIC (type
) = 1;
13525 /* Create the vector of member function fields, and attach it to the type. */
13528 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
13529 struct dwarf2_cu
*cu
)
13531 struct fnfieldlist
*flp
;
13534 if (cu
->language
== language_ada
)
13535 error (_("unexpected member functions in Ada type"));
13537 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13538 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
13539 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
13541 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
13543 struct nextfnfield
*nfp
= flp
->head
;
13544 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
13547 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
13548 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
13549 fn_flp
->fn_fields
= (struct fn_field
*)
13550 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
13551 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
13552 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
13555 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
13558 /* Returns non-zero if NAME is the name of a vtable member in CU's
13559 language, zero otherwise. */
13561 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
13563 static const char vptr
[] = "_vptr";
13564 static const char vtable
[] = "vtable";
13566 /* Look for the C++ form of the vtable. */
13567 if (startswith (name
, vptr
) && is_cplus_marker (name
[sizeof (vptr
) - 1]))
13573 /* GCC outputs unnamed structures that are really pointers to member
13574 functions, with the ABI-specified layout. If TYPE describes
13575 such a structure, smash it into a member function type.
13577 GCC shouldn't do this; it should just output pointer to member DIEs.
13578 This is GCC PR debug/28767. */
13581 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
13583 struct type
*pfn_type
, *self_type
, *new_type
;
13585 /* Check for a structure with no name and two children. */
13586 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
13589 /* Check for __pfn and __delta members. */
13590 if (TYPE_FIELD_NAME (type
, 0) == NULL
13591 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
13592 || TYPE_FIELD_NAME (type
, 1) == NULL
13593 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
13596 /* Find the type of the method. */
13597 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
13598 if (pfn_type
== NULL
13599 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
13600 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
13603 /* Look for the "this" argument. */
13604 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
13605 if (TYPE_NFIELDS (pfn_type
) == 0
13606 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
13607 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
13610 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
13611 new_type
= alloc_type (objfile
);
13612 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
13613 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
13614 TYPE_VARARGS (pfn_type
));
13615 smash_to_methodptr_type (type
, new_type
);
13619 /* Called when we find the DIE that starts a structure or union scope
13620 (definition) to create a type for the structure or union. Fill in
13621 the type's name and general properties; the members will not be
13622 processed until process_structure_scope. A symbol table entry for
13623 the type will also not be done until process_structure_scope (assuming
13624 the type has a name).
13626 NOTE: we need to call these functions regardless of whether or not the
13627 DIE has a DW_AT_name attribute, since it might be an anonymous
13628 structure or union. This gets the type entered into our set of
13629 user defined types. */
13631 static struct type
*
13632 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13634 struct objfile
*objfile
= cu
->objfile
;
13636 struct attribute
*attr
;
13639 /* If the definition of this type lives in .debug_types, read that type.
13640 Don't follow DW_AT_specification though, that will take us back up
13641 the chain and we want to go down. */
13642 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
13645 type
= get_DW_AT_signature_type (die
, attr
, cu
);
13647 /* The type's CU may not be the same as CU.
13648 Ensure TYPE is recorded with CU in die_type_hash. */
13649 return set_die_type (die
, type
, cu
);
13652 type
= alloc_type (objfile
);
13653 INIT_CPLUS_SPECIFIC (type
);
13655 name
= dwarf2_name (die
, cu
);
13658 if (cu
->language
== language_cplus
13659 || cu
->language
== language_d
13660 || cu
->language
== language_rust
)
13662 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
13664 /* dwarf2_full_name might have already finished building the DIE's
13665 type. If so, there is no need to continue. */
13666 if (get_die_type (die
, cu
) != NULL
)
13667 return get_die_type (die
, cu
);
13669 TYPE_TAG_NAME (type
) = full_name
;
13670 if (die
->tag
== DW_TAG_structure_type
13671 || die
->tag
== DW_TAG_class_type
)
13672 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
13676 /* The name is already allocated along with this objfile, so
13677 we don't need to duplicate it for the type. */
13678 TYPE_TAG_NAME (type
) = name
;
13679 if (die
->tag
== DW_TAG_class_type
)
13680 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
13684 if (die
->tag
== DW_TAG_structure_type
)
13686 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13688 else if (die
->tag
== DW_TAG_union_type
)
13690 TYPE_CODE (type
) = TYPE_CODE_UNION
;
13694 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13697 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
13698 TYPE_DECLARED_CLASS (type
) = 1;
13700 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13703 if (attr_form_is_constant (attr
))
13704 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13707 /* For the moment, dynamic type sizes are not supported
13708 by GDB's struct type. The actual size is determined
13709 on-demand when resolving the type of a given object,
13710 so set the type's length to zero for now. Otherwise,
13711 we record an expression as the length, and that expression
13712 could lead to a very large value, which could eventually
13713 lead to us trying to allocate that much memory when creating
13714 a value of that type. */
13715 TYPE_LENGTH (type
) = 0;
13720 TYPE_LENGTH (type
) = 0;
13723 if (producer_is_icc_lt_14 (cu
) && (TYPE_LENGTH (type
) == 0))
13725 /* ICC<14 does not output the required DW_AT_declaration on
13726 incomplete types, but gives them a size of zero. */
13727 TYPE_STUB (type
) = 1;
13730 TYPE_STUB_SUPPORTED (type
) = 1;
13732 if (die_is_declaration (die
, cu
))
13733 TYPE_STUB (type
) = 1;
13734 else if (attr
== NULL
&& die
->child
== NULL
13735 && producer_is_realview (cu
->producer
))
13736 /* RealView does not output the required DW_AT_declaration
13737 on incomplete types. */
13738 TYPE_STUB (type
) = 1;
13740 /* We need to add the type field to the die immediately so we don't
13741 infinitely recurse when dealing with pointers to the structure
13742 type within the structure itself. */
13743 set_die_type (die
, type
, cu
);
13745 /* set_die_type should be already done. */
13746 set_descriptive_type (type
, die
, cu
);
13751 /* Finish creating a structure or union type, including filling in
13752 its members and creating a symbol for it. */
13755 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13757 struct objfile
*objfile
= cu
->objfile
;
13758 struct die_info
*child_die
;
13761 type
= get_die_type (die
, cu
);
13763 type
= read_structure_type (die
, cu
);
13765 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
13767 struct field_info fi
;
13768 VEC (symbolp
) *template_args
= NULL
;
13769 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
13771 memset (&fi
, 0, sizeof (struct field_info
));
13773 child_die
= die
->child
;
13775 while (child_die
&& child_die
->tag
)
13777 if (child_die
->tag
== DW_TAG_member
13778 || child_die
->tag
== DW_TAG_variable
)
13780 /* NOTE: carlton/2002-11-05: A C++ static data member
13781 should be a DW_TAG_member that is a declaration, but
13782 all versions of G++ as of this writing (so through at
13783 least 3.2.1) incorrectly generate DW_TAG_variable
13784 tags for them instead. */
13785 dwarf2_add_field (&fi
, child_die
, cu
);
13787 else if (child_die
->tag
== DW_TAG_subprogram
)
13789 /* Rust doesn't have member functions in the C++ sense.
13790 However, it does emit ordinary functions as children
13791 of a struct DIE. */
13792 if (cu
->language
== language_rust
)
13793 read_func_scope (child_die
, cu
);
13796 /* C++ member function. */
13797 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
13800 else if (child_die
->tag
== DW_TAG_inheritance
)
13802 /* C++ base class field. */
13803 dwarf2_add_field (&fi
, child_die
, cu
);
13805 else if (child_die
->tag
== DW_TAG_typedef
)
13806 dwarf2_add_typedef (&fi
, child_die
, cu
);
13807 else if (child_die
->tag
== DW_TAG_template_type_param
13808 || child_die
->tag
== DW_TAG_template_value_param
)
13810 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13813 VEC_safe_push (symbolp
, template_args
, arg
);
13816 child_die
= sibling_die (child_die
);
13819 /* Attach template arguments to type. */
13820 if (! VEC_empty (symbolp
, template_args
))
13822 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13823 TYPE_N_TEMPLATE_ARGUMENTS (type
)
13824 = VEC_length (symbolp
, template_args
);
13825 TYPE_TEMPLATE_ARGUMENTS (type
)
13826 = XOBNEWVEC (&objfile
->objfile_obstack
,
13828 TYPE_N_TEMPLATE_ARGUMENTS (type
));
13829 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
13830 VEC_address (symbolp
, template_args
),
13831 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
13832 * sizeof (struct symbol
*)));
13833 VEC_free (symbolp
, template_args
);
13836 /* Attach fields and member functions to the type. */
13838 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
13841 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
13843 /* Get the type which refers to the base class (possibly this
13844 class itself) which contains the vtable pointer for the current
13845 class from the DW_AT_containing_type attribute. This use of
13846 DW_AT_containing_type is a GNU extension. */
13848 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
13850 struct type
*t
= die_containing_type (die
, cu
);
13852 set_type_vptr_basetype (type
, t
);
13857 /* Our own class provides vtbl ptr. */
13858 for (i
= TYPE_NFIELDS (t
) - 1;
13859 i
>= TYPE_N_BASECLASSES (t
);
13862 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
13864 if (is_vtable_name (fieldname
, cu
))
13866 set_type_vptr_fieldno (type
, i
);
13871 /* Complain if virtual function table field not found. */
13872 if (i
< TYPE_N_BASECLASSES (t
))
13873 complaint (&symfile_complaints
,
13874 _("virtual function table pointer "
13875 "not found when defining class '%s'"),
13876 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
13881 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
13884 else if (cu
->producer
13885 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
13887 /* The IBM XLC compiler does not provide direct indication
13888 of the containing type, but the vtable pointer is
13889 always named __vfp. */
13893 for (i
= TYPE_NFIELDS (type
) - 1;
13894 i
>= TYPE_N_BASECLASSES (type
);
13897 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
13899 set_type_vptr_fieldno (type
, i
);
13900 set_type_vptr_basetype (type
, type
);
13907 /* Copy fi.typedef_field_list linked list elements content into the
13908 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
13909 if (fi
.typedef_field_list
)
13911 int i
= fi
.typedef_field_list_count
;
13913 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13914 TYPE_TYPEDEF_FIELD_ARRAY (type
)
13915 = ((struct typedef_field
*)
13916 TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
));
13917 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
13919 /* Reverse the list order to keep the debug info elements order. */
13922 struct typedef_field
*dest
, *src
;
13924 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
13925 src
= &fi
.typedef_field_list
->field
;
13926 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
13931 do_cleanups (back_to
);
13934 quirk_gcc_member_function_pointer (type
, objfile
);
13936 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
13937 snapshots) has been known to create a die giving a declaration
13938 for a class that has, as a child, a die giving a definition for a
13939 nested class. So we have to process our children even if the
13940 current die is a declaration. Normally, of course, a declaration
13941 won't have any children at all. */
13943 child_die
= die
->child
;
13945 while (child_die
!= NULL
&& child_die
->tag
)
13947 if (child_die
->tag
== DW_TAG_member
13948 || child_die
->tag
== DW_TAG_variable
13949 || child_die
->tag
== DW_TAG_inheritance
13950 || child_die
->tag
== DW_TAG_template_value_param
13951 || child_die
->tag
== DW_TAG_template_type_param
)
13956 process_die (child_die
, cu
);
13958 child_die
= sibling_die (child_die
);
13961 /* Do not consider external references. According to the DWARF standard,
13962 these DIEs are identified by the fact that they have no byte_size
13963 attribute, and a declaration attribute. */
13964 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
13965 || !die_is_declaration (die
, cu
))
13966 new_symbol (die
, type
, cu
);
13969 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
13970 update TYPE using some information only available in DIE's children. */
13973 update_enumeration_type_from_children (struct die_info
*die
,
13975 struct dwarf2_cu
*cu
)
13977 struct die_info
*child_die
;
13978 int unsigned_enum
= 1;
13982 auto_obstack obstack
;
13984 for (child_die
= die
->child
;
13985 child_die
!= NULL
&& child_die
->tag
;
13986 child_die
= sibling_die (child_die
))
13988 struct attribute
*attr
;
13990 const gdb_byte
*bytes
;
13991 struct dwarf2_locexpr_baton
*baton
;
13994 if (child_die
->tag
!= DW_TAG_enumerator
)
13997 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
14001 name
= dwarf2_name (child_die
, cu
);
14003 name
= "<anonymous enumerator>";
14005 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
14006 &value
, &bytes
, &baton
);
14012 else if ((mask
& value
) != 0)
14017 /* If we already know that the enum type is neither unsigned, nor
14018 a flag type, no need to look at the rest of the enumerates. */
14019 if (!unsigned_enum
&& !flag_enum
)
14024 TYPE_UNSIGNED (type
) = 1;
14026 TYPE_FLAG_ENUM (type
) = 1;
14029 /* Given a DW_AT_enumeration_type die, set its type. We do not
14030 complete the type's fields yet, or create any symbols. */
14032 static struct type
*
14033 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14035 struct objfile
*objfile
= cu
->objfile
;
14037 struct attribute
*attr
;
14040 /* If the definition of this type lives in .debug_types, read that type.
14041 Don't follow DW_AT_specification though, that will take us back up
14042 the chain and we want to go down. */
14043 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
14046 type
= get_DW_AT_signature_type (die
, attr
, cu
);
14048 /* The type's CU may not be the same as CU.
14049 Ensure TYPE is recorded with CU in die_type_hash. */
14050 return set_die_type (die
, type
, cu
);
14053 type
= alloc_type (objfile
);
14055 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
14056 name
= dwarf2_full_name (NULL
, die
, cu
);
14058 TYPE_TAG_NAME (type
) = name
;
14060 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
14063 struct type
*underlying_type
= die_type (die
, cu
);
14065 TYPE_TARGET_TYPE (type
) = underlying_type
;
14068 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14071 TYPE_LENGTH (type
) = DW_UNSND (attr
);
14075 TYPE_LENGTH (type
) = 0;
14078 /* The enumeration DIE can be incomplete. In Ada, any type can be
14079 declared as private in the package spec, and then defined only
14080 inside the package body. Such types are known as Taft Amendment
14081 Types. When another package uses such a type, an incomplete DIE
14082 may be generated by the compiler. */
14083 if (die_is_declaration (die
, cu
))
14084 TYPE_STUB (type
) = 1;
14086 /* Finish the creation of this type by using the enum's children.
14087 We must call this even when the underlying type has been provided
14088 so that we can determine if we're looking at a "flag" enum. */
14089 update_enumeration_type_from_children (die
, type
, cu
);
14091 /* If this type has an underlying type that is not a stub, then we
14092 may use its attributes. We always use the "unsigned" attribute
14093 in this situation, because ordinarily we guess whether the type
14094 is unsigned -- but the guess can be wrong and the underlying type
14095 can tell us the reality. However, we defer to a local size
14096 attribute if one exists, because this lets the compiler override
14097 the underlying type if needed. */
14098 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
14100 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
14101 if (TYPE_LENGTH (type
) == 0)
14102 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
14105 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
14107 return set_die_type (die
, type
, cu
);
14110 /* Given a pointer to a die which begins an enumeration, process all
14111 the dies that define the members of the enumeration, and create the
14112 symbol for the enumeration type.
14114 NOTE: We reverse the order of the element list. */
14117 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
14119 struct type
*this_type
;
14121 this_type
= get_die_type (die
, cu
);
14122 if (this_type
== NULL
)
14123 this_type
= read_enumeration_type (die
, cu
);
14125 if (die
->child
!= NULL
)
14127 struct die_info
*child_die
;
14128 struct symbol
*sym
;
14129 struct field
*fields
= NULL
;
14130 int num_fields
= 0;
14133 child_die
= die
->child
;
14134 while (child_die
&& child_die
->tag
)
14136 if (child_die
->tag
!= DW_TAG_enumerator
)
14138 process_die (child_die
, cu
);
14142 name
= dwarf2_name (child_die
, cu
);
14145 sym
= new_symbol (child_die
, this_type
, cu
);
14147 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
14149 fields
= (struct field
*)
14151 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
14152 * sizeof (struct field
));
14155 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
14156 FIELD_TYPE (fields
[num_fields
]) = NULL
;
14157 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
14158 FIELD_BITSIZE (fields
[num_fields
]) = 0;
14164 child_die
= sibling_die (child_die
);
14169 TYPE_NFIELDS (this_type
) = num_fields
;
14170 TYPE_FIELDS (this_type
) = (struct field
*)
14171 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
14172 memcpy (TYPE_FIELDS (this_type
), fields
,
14173 sizeof (struct field
) * num_fields
);
14178 /* If we are reading an enum from a .debug_types unit, and the enum
14179 is a declaration, and the enum is not the signatured type in the
14180 unit, then we do not want to add a symbol for it. Adding a
14181 symbol would in some cases obscure the true definition of the
14182 enum, giving users an incomplete type when the definition is
14183 actually available. Note that we do not want to do this for all
14184 enums which are just declarations, because C++0x allows forward
14185 enum declarations. */
14186 if (cu
->per_cu
->is_debug_types
14187 && die_is_declaration (die
, cu
))
14189 struct signatured_type
*sig_type
;
14191 sig_type
= (struct signatured_type
*) cu
->per_cu
;
14192 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
14193 if (sig_type
->type_offset_in_section
!= die
->sect_off
)
14197 new_symbol (die
, this_type
, cu
);
14200 /* Extract all information from a DW_TAG_array_type DIE and put it in
14201 the DIE's type field. For now, this only handles one dimensional
14204 static struct type
*
14205 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14207 struct objfile
*objfile
= cu
->objfile
;
14208 struct die_info
*child_die
;
14210 struct type
*element_type
, *range_type
, *index_type
;
14211 struct type
**range_types
= NULL
;
14212 struct attribute
*attr
;
14214 struct cleanup
*back_to
;
14216 unsigned int bit_stride
= 0;
14218 element_type
= die_type (die
, cu
);
14220 /* The die_type call above may have already set the type for this DIE. */
14221 type
= get_die_type (die
, cu
);
14225 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
14227 bit_stride
= DW_UNSND (attr
) * 8;
14229 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
14231 bit_stride
= DW_UNSND (attr
);
14233 /* Irix 6.2 native cc creates array types without children for
14234 arrays with unspecified length. */
14235 if (die
->child
== NULL
)
14237 index_type
= objfile_type (objfile
)->builtin_int
;
14238 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
14239 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
14241 return set_die_type (die
, type
, cu
);
14244 back_to
= make_cleanup (null_cleanup
, NULL
);
14245 child_die
= die
->child
;
14246 while (child_die
&& child_die
->tag
)
14248 if (child_die
->tag
== DW_TAG_subrange_type
)
14250 struct type
*child_type
= read_type_die (child_die
, cu
);
14252 if (child_type
!= NULL
)
14254 /* The range type was succesfully read. Save it for the
14255 array type creation. */
14256 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
14258 range_types
= (struct type
**)
14259 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
14260 * sizeof (struct type
*));
14262 make_cleanup (free_current_contents
, &range_types
);
14264 range_types
[ndim
++] = child_type
;
14267 child_die
= sibling_die (child_die
);
14270 /* Dwarf2 dimensions are output from left to right, create the
14271 necessary array types in backwards order. */
14273 type
= element_type
;
14275 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
14280 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
14286 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
14290 /* Understand Dwarf2 support for vector types (like they occur on
14291 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
14292 array type. This is not part of the Dwarf2/3 standard yet, but a
14293 custom vendor extension. The main difference between a regular
14294 array and the vector variant is that vectors are passed by value
14296 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
14298 make_vector_type (type
);
14300 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
14301 implementation may choose to implement triple vectors using this
14303 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14306 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
14307 TYPE_LENGTH (type
) = DW_UNSND (attr
);
14309 complaint (&symfile_complaints
,
14310 _("DW_AT_byte_size for array type smaller "
14311 "than the total size of elements"));
14314 name
= dwarf2_name (die
, cu
);
14316 TYPE_NAME (type
) = name
;
14318 /* Install the type in the die. */
14319 set_die_type (die
, type
, cu
);
14321 /* set_die_type should be already done. */
14322 set_descriptive_type (type
, die
, cu
);
14324 do_cleanups (back_to
);
14329 static enum dwarf_array_dim_ordering
14330 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
14332 struct attribute
*attr
;
14334 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
14337 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
14339 /* GNU F77 is a special case, as at 08/2004 array type info is the
14340 opposite order to the dwarf2 specification, but data is still
14341 laid out as per normal fortran.
14343 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
14344 version checking. */
14346 if (cu
->language
== language_fortran
14347 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
14349 return DW_ORD_row_major
;
14352 switch (cu
->language_defn
->la_array_ordering
)
14354 case array_column_major
:
14355 return DW_ORD_col_major
;
14356 case array_row_major
:
14358 return DW_ORD_row_major
;
14362 /* Extract all information from a DW_TAG_set_type DIE and put it in
14363 the DIE's type field. */
14365 static struct type
*
14366 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14368 struct type
*domain_type
, *set_type
;
14369 struct attribute
*attr
;
14371 domain_type
= die_type (die
, cu
);
14373 /* The die_type call above may have already set the type for this DIE. */
14374 set_type
= get_die_type (die
, cu
);
14378 set_type
= create_set_type (NULL
, domain_type
);
14380 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14382 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
14384 return set_die_type (die
, set_type
, cu
);
14387 /* A helper for read_common_block that creates a locexpr baton.
14388 SYM is the symbol which we are marking as computed.
14389 COMMON_DIE is the DIE for the common block.
14390 COMMON_LOC is the location expression attribute for the common
14392 MEMBER_LOC is the location expression attribute for the particular
14393 member of the common block that we are processing.
14394 CU is the CU from which the above come. */
14397 mark_common_block_symbol_computed (struct symbol
*sym
,
14398 struct die_info
*common_die
,
14399 struct attribute
*common_loc
,
14400 struct attribute
*member_loc
,
14401 struct dwarf2_cu
*cu
)
14403 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14404 struct dwarf2_locexpr_baton
*baton
;
14406 unsigned int cu_off
;
14407 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
14408 LONGEST offset
= 0;
14410 gdb_assert (common_loc
&& member_loc
);
14411 gdb_assert (attr_form_is_block (common_loc
));
14412 gdb_assert (attr_form_is_block (member_loc
)
14413 || attr_form_is_constant (member_loc
));
14415 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
14416 baton
->per_cu
= cu
->per_cu
;
14417 gdb_assert (baton
->per_cu
);
14419 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
14421 if (attr_form_is_constant (member_loc
))
14423 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
14424 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
14427 baton
->size
+= DW_BLOCK (member_loc
)->size
;
14429 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
14432 *ptr
++ = DW_OP_call4
;
14433 cu_off
= common_die
->sect_off
- cu
->per_cu
->sect_off
;
14434 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
14437 if (attr_form_is_constant (member_loc
))
14439 *ptr
++ = DW_OP_addr
;
14440 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
14441 ptr
+= cu
->header
.addr_size
;
14445 /* We have to copy the data here, because DW_OP_call4 will only
14446 use a DW_AT_location attribute. */
14447 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
14448 ptr
+= DW_BLOCK (member_loc
)->size
;
14451 *ptr
++ = DW_OP_plus
;
14452 gdb_assert (ptr
- baton
->data
== baton
->size
);
14454 SYMBOL_LOCATION_BATON (sym
) = baton
;
14455 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
14458 /* Create appropriate locally-scoped variables for all the
14459 DW_TAG_common_block entries. Also create a struct common_block
14460 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
14461 is used to sepate the common blocks name namespace from regular
14465 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
14467 struct attribute
*attr
;
14469 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
14472 /* Support the .debug_loc offsets. */
14473 if (attr_form_is_block (attr
))
14477 else if (attr_form_is_section_offset (attr
))
14479 dwarf2_complex_location_expr_complaint ();
14484 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
14485 "common block member");
14490 if (die
->child
!= NULL
)
14492 struct objfile
*objfile
= cu
->objfile
;
14493 struct die_info
*child_die
;
14494 size_t n_entries
= 0, size
;
14495 struct common_block
*common_block
;
14496 struct symbol
*sym
;
14498 for (child_die
= die
->child
;
14499 child_die
&& child_die
->tag
;
14500 child_die
= sibling_die (child_die
))
14503 size
= (sizeof (struct common_block
)
14504 + (n_entries
- 1) * sizeof (struct symbol
*));
14506 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
14508 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
14509 common_block
->n_entries
= 0;
14511 for (child_die
= die
->child
;
14512 child_die
&& child_die
->tag
;
14513 child_die
= sibling_die (child_die
))
14515 /* Create the symbol in the DW_TAG_common_block block in the current
14517 sym
= new_symbol (child_die
, NULL
, cu
);
14520 struct attribute
*member_loc
;
14522 common_block
->contents
[common_block
->n_entries
++] = sym
;
14524 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
14528 /* GDB has handled this for a long time, but it is
14529 not specified by DWARF. It seems to have been
14530 emitted by gfortran at least as recently as:
14531 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
14532 complaint (&symfile_complaints
,
14533 _("Variable in common block has "
14534 "DW_AT_data_member_location "
14535 "- DIE at 0x%x [in module %s]"),
14536 to_underlying (child_die
->sect_off
),
14537 objfile_name (cu
->objfile
));
14539 if (attr_form_is_section_offset (member_loc
))
14540 dwarf2_complex_location_expr_complaint ();
14541 else if (attr_form_is_constant (member_loc
)
14542 || attr_form_is_block (member_loc
))
14545 mark_common_block_symbol_computed (sym
, die
, attr
,
14549 dwarf2_complex_location_expr_complaint ();
14554 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
14555 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
14559 /* Create a type for a C++ namespace. */
14561 static struct type
*
14562 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14564 struct objfile
*objfile
= cu
->objfile
;
14565 const char *previous_prefix
, *name
;
14569 /* For extensions, reuse the type of the original namespace. */
14570 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
14572 struct die_info
*ext_die
;
14573 struct dwarf2_cu
*ext_cu
= cu
;
14575 ext_die
= dwarf2_extension (die
, &ext_cu
);
14576 type
= read_type_die (ext_die
, ext_cu
);
14578 /* EXT_CU may not be the same as CU.
14579 Ensure TYPE is recorded with CU in die_type_hash. */
14580 return set_die_type (die
, type
, cu
);
14583 name
= namespace_name (die
, &is_anonymous
, cu
);
14585 /* Now build the name of the current namespace. */
14587 previous_prefix
= determine_prefix (die
, cu
);
14588 if (previous_prefix
[0] != '\0')
14589 name
= typename_concat (&objfile
->objfile_obstack
,
14590 previous_prefix
, name
, 0, cu
);
14592 /* Create the type. */
14593 type
= init_type (objfile
, TYPE_CODE_NAMESPACE
, 0, name
);
14594 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
14596 return set_die_type (die
, type
, cu
);
14599 /* Read a namespace scope. */
14602 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
14604 struct objfile
*objfile
= cu
->objfile
;
14607 /* Add a symbol associated to this if we haven't seen the namespace
14608 before. Also, add a using directive if it's an anonymous
14611 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
14615 type
= read_type_die (die
, cu
);
14616 new_symbol (die
, type
, cu
);
14618 namespace_name (die
, &is_anonymous
, cu
);
14621 const char *previous_prefix
= determine_prefix (die
, cu
);
14623 std::vector
<const char *> excludes
;
14624 add_using_directive (using_directives (cu
->language
),
14625 previous_prefix
, TYPE_NAME (type
), NULL
,
14626 NULL
, excludes
, 0, &objfile
->objfile_obstack
);
14630 if (die
->child
!= NULL
)
14632 struct die_info
*child_die
= die
->child
;
14634 while (child_die
&& child_die
->tag
)
14636 process_die (child_die
, cu
);
14637 child_die
= sibling_die (child_die
);
14642 /* Read a Fortran module as type. This DIE can be only a declaration used for
14643 imported module. Still we need that type as local Fortran "use ... only"
14644 declaration imports depend on the created type in determine_prefix. */
14646 static struct type
*
14647 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14649 struct objfile
*objfile
= cu
->objfile
;
14650 const char *module_name
;
14653 module_name
= dwarf2_name (die
, cu
);
14655 complaint (&symfile_complaints
,
14656 _("DW_TAG_module has no name, offset 0x%x"),
14657 to_underlying (die
->sect_off
));
14658 type
= init_type (objfile
, TYPE_CODE_MODULE
, 0, module_name
);
14660 /* determine_prefix uses TYPE_TAG_NAME. */
14661 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
14663 return set_die_type (die
, type
, cu
);
14666 /* Read a Fortran module. */
14669 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
14671 struct die_info
*child_die
= die
->child
;
14674 type
= read_type_die (die
, cu
);
14675 new_symbol (die
, type
, cu
);
14677 while (child_die
&& child_die
->tag
)
14679 process_die (child_die
, cu
);
14680 child_die
= sibling_die (child_die
);
14684 /* Return the name of the namespace represented by DIE. Set
14685 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
14688 static const char *
14689 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
14691 struct die_info
*current_die
;
14692 const char *name
= NULL
;
14694 /* Loop through the extensions until we find a name. */
14696 for (current_die
= die
;
14697 current_die
!= NULL
;
14698 current_die
= dwarf2_extension (die
, &cu
))
14700 /* We don't use dwarf2_name here so that we can detect the absence
14701 of a name -> anonymous namespace. */
14702 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
14708 /* Is it an anonymous namespace? */
14710 *is_anonymous
= (name
== NULL
);
14712 name
= CP_ANONYMOUS_NAMESPACE_STR
;
14717 /* Extract all information from a DW_TAG_pointer_type DIE and add to
14718 the user defined type vector. */
14720 static struct type
*
14721 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14723 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
14724 struct comp_unit_head
*cu_header
= &cu
->header
;
14726 struct attribute
*attr_byte_size
;
14727 struct attribute
*attr_address_class
;
14728 int byte_size
, addr_class
;
14729 struct type
*target_type
;
14731 target_type
= die_type (die
, cu
);
14733 /* The die_type call above may have already set the type for this DIE. */
14734 type
= get_die_type (die
, cu
);
14738 type
= lookup_pointer_type (target_type
);
14740 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14741 if (attr_byte_size
)
14742 byte_size
= DW_UNSND (attr_byte_size
);
14744 byte_size
= cu_header
->addr_size
;
14746 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
14747 if (attr_address_class
)
14748 addr_class
= DW_UNSND (attr_address_class
);
14750 addr_class
= DW_ADDR_none
;
14752 /* If the pointer size or address class is different than the
14753 default, create a type variant marked as such and set the
14754 length accordingly. */
14755 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
14757 if (gdbarch_address_class_type_flags_p (gdbarch
))
14761 type_flags
= gdbarch_address_class_type_flags
14762 (gdbarch
, byte_size
, addr_class
);
14763 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
14765 type
= make_type_with_address_space (type
, type_flags
);
14767 else if (TYPE_LENGTH (type
) != byte_size
)
14769 complaint (&symfile_complaints
,
14770 _("invalid pointer size %d"), byte_size
);
14774 /* Should we also complain about unhandled address classes? */
14778 TYPE_LENGTH (type
) = byte_size
;
14779 return set_die_type (die
, type
, cu
);
14782 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
14783 the user defined type vector. */
14785 static struct type
*
14786 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14789 struct type
*to_type
;
14790 struct type
*domain
;
14792 to_type
= die_type (die
, cu
);
14793 domain
= die_containing_type (die
, cu
);
14795 /* The calls above may have already set the type for this DIE. */
14796 type
= get_die_type (die
, cu
);
14800 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
14801 type
= lookup_methodptr_type (to_type
);
14802 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
14804 struct type
*new_type
= alloc_type (cu
->objfile
);
14806 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
14807 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
14808 TYPE_VARARGS (to_type
));
14809 type
= lookup_methodptr_type (new_type
);
14812 type
= lookup_memberptr_type (to_type
, domain
);
14814 return set_die_type (die
, type
, cu
);
14817 /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to
14818 the user defined type vector. */
14820 static struct type
*
14821 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
14822 enum type_code refcode
)
14824 struct comp_unit_head
*cu_header
= &cu
->header
;
14825 struct type
*type
, *target_type
;
14826 struct attribute
*attr
;
14828 gdb_assert (refcode
== TYPE_CODE_REF
|| refcode
== TYPE_CODE_RVALUE_REF
);
14830 target_type
= die_type (die
, cu
);
14832 /* The die_type call above may have already set the type for this DIE. */
14833 type
= get_die_type (die
, cu
);
14837 type
= lookup_reference_type (target_type
, refcode
);
14838 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14841 TYPE_LENGTH (type
) = DW_UNSND (attr
);
14845 TYPE_LENGTH (type
) = cu_header
->addr_size
;
14847 return set_die_type (die
, type
, cu
);
14850 /* Add the given cv-qualifiers to the element type of the array. GCC
14851 outputs DWARF type qualifiers that apply to an array, not the
14852 element type. But GDB relies on the array element type to carry
14853 the cv-qualifiers. This mimics section 6.7.3 of the C99
14856 static struct type
*
14857 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
14858 struct type
*base_type
, int cnst
, int voltl
)
14860 struct type
*el_type
, *inner_array
;
14862 base_type
= copy_type (base_type
);
14863 inner_array
= base_type
;
14865 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
14867 TYPE_TARGET_TYPE (inner_array
) =
14868 copy_type (TYPE_TARGET_TYPE (inner_array
));
14869 inner_array
= TYPE_TARGET_TYPE (inner_array
);
14872 el_type
= TYPE_TARGET_TYPE (inner_array
);
14873 cnst
|= TYPE_CONST (el_type
);
14874 voltl
|= TYPE_VOLATILE (el_type
);
14875 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
14877 return set_die_type (die
, base_type
, cu
);
14880 static struct type
*
14881 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14883 struct type
*base_type
, *cv_type
;
14885 base_type
= die_type (die
, cu
);
14887 /* The die_type call above may have already set the type for this DIE. */
14888 cv_type
= get_die_type (die
, cu
);
14892 /* In case the const qualifier is applied to an array type, the element type
14893 is so qualified, not the array type (section 6.7.3 of C99). */
14894 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14895 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
14897 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
14898 return set_die_type (die
, cv_type
, cu
);
14901 static struct type
*
14902 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14904 struct type
*base_type
, *cv_type
;
14906 base_type
= die_type (die
, cu
);
14908 /* The die_type call above may have already set the type for this DIE. */
14909 cv_type
= get_die_type (die
, cu
);
14913 /* In case the volatile qualifier is applied to an array type, the
14914 element type is so qualified, not the array type (section 6.7.3
14916 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14917 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
14919 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
14920 return set_die_type (die
, cv_type
, cu
);
14923 /* Handle DW_TAG_restrict_type. */
14925 static struct type
*
14926 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14928 struct type
*base_type
, *cv_type
;
14930 base_type
= die_type (die
, cu
);
14932 /* The die_type call above may have already set the type for this DIE. */
14933 cv_type
= get_die_type (die
, cu
);
14937 cv_type
= make_restrict_type (base_type
);
14938 return set_die_type (die
, cv_type
, cu
);
14941 /* Handle DW_TAG_atomic_type. */
14943 static struct type
*
14944 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14946 struct type
*base_type
, *cv_type
;
14948 base_type
= die_type (die
, cu
);
14950 /* The die_type call above may have already set the type for this DIE. */
14951 cv_type
= get_die_type (die
, cu
);
14955 cv_type
= make_atomic_type (base_type
);
14956 return set_die_type (die
, cv_type
, cu
);
14959 /* Extract all information from a DW_TAG_string_type DIE and add to
14960 the user defined type vector. It isn't really a user defined type,
14961 but it behaves like one, with other DIE's using an AT_user_def_type
14962 attribute to reference it. */
14964 static struct type
*
14965 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14967 struct objfile
*objfile
= cu
->objfile
;
14968 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14969 struct type
*type
, *range_type
, *index_type
, *char_type
;
14970 struct attribute
*attr
;
14971 unsigned int length
;
14973 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
14976 length
= DW_UNSND (attr
);
14980 /* Check for the DW_AT_byte_size attribute. */
14981 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14984 length
= DW_UNSND (attr
);
14992 index_type
= objfile_type (objfile
)->builtin_int
;
14993 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
14994 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
14995 type
= create_string_type (NULL
, char_type
, range_type
);
14997 return set_die_type (die
, type
, cu
);
15000 /* Assuming that DIE corresponds to a function, returns nonzero
15001 if the function is prototyped. */
15004 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
15006 struct attribute
*attr
;
15008 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
15009 if (attr
&& (DW_UNSND (attr
) != 0))
15012 /* The DWARF standard implies that the DW_AT_prototyped attribute
15013 is only meaninful for C, but the concept also extends to other
15014 languages that allow unprototyped functions (Eg: Objective C).
15015 For all other languages, assume that functions are always
15017 if (cu
->language
!= language_c
15018 && cu
->language
!= language_objc
15019 && cu
->language
!= language_opencl
)
15022 /* RealView does not emit DW_AT_prototyped. We can not distinguish
15023 prototyped and unprototyped functions; default to prototyped,
15024 since that is more common in modern code (and RealView warns
15025 about unprototyped functions). */
15026 if (producer_is_realview (cu
->producer
))
15032 /* Handle DIES due to C code like:
15036 int (*funcp)(int a, long l);
15040 ('funcp' generates a DW_TAG_subroutine_type DIE). */
15042 static struct type
*
15043 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15045 struct objfile
*objfile
= cu
->objfile
;
15046 struct type
*type
; /* Type that this function returns. */
15047 struct type
*ftype
; /* Function that returns above type. */
15048 struct attribute
*attr
;
15050 type
= die_type (die
, cu
);
15052 /* The die_type call above may have already set the type for this DIE. */
15053 ftype
= get_die_type (die
, cu
);
15057 ftype
= lookup_function_type (type
);
15059 if (prototyped_function_p (die
, cu
))
15060 TYPE_PROTOTYPED (ftype
) = 1;
15062 /* Store the calling convention in the type if it's available in
15063 the subroutine die. Otherwise set the calling convention to
15064 the default value DW_CC_normal. */
15065 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
15067 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
15068 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
15069 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
15071 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
15073 /* Record whether the function returns normally to its caller or not
15074 if the DWARF producer set that information. */
15075 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
15076 if (attr
&& (DW_UNSND (attr
) != 0))
15077 TYPE_NO_RETURN (ftype
) = 1;
15079 /* We need to add the subroutine type to the die immediately so
15080 we don't infinitely recurse when dealing with parameters
15081 declared as the same subroutine type. */
15082 set_die_type (die
, ftype
, cu
);
15084 if (die
->child
!= NULL
)
15086 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
15087 struct die_info
*child_die
;
15088 int nparams
, iparams
;
15090 /* Count the number of parameters.
15091 FIXME: GDB currently ignores vararg functions, but knows about
15092 vararg member functions. */
15094 child_die
= die
->child
;
15095 while (child_die
&& child_die
->tag
)
15097 if (child_die
->tag
== DW_TAG_formal_parameter
)
15099 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
15100 TYPE_VARARGS (ftype
) = 1;
15101 child_die
= sibling_die (child_die
);
15104 /* Allocate storage for parameters and fill them in. */
15105 TYPE_NFIELDS (ftype
) = nparams
;
15106 TYPE_FIELDS (ftype
) = (struct field
*)
15107 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
15109 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
15110 even if we error out during the parameters reading below. */
15111 for (iparams
= 0; iparams
< nparams
; iparams
++)
15112 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
15115 child_die
= die
->child
;
15116 while (child_die
&& child_die
->tag
)
15118 if (child_die
->tag
== DW_TAG_formal_parameter
)
15120 struct type
*arg_type
;
15122 /* DWARF version 2 has no clean way to discern C++
15123 static and non-static member functions. G++ helps
15124 GDB by marking the first parameter for non-static
15125 member functions (which is the this pointer) as
15126 artificial. We pass this information to
15127 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
15129 DWARF version 3 added DW_AT_object_pointer, which GCC
15130 4.5 does not yet generate. */
15131 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
15133 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
15135 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
15136 arg_type
= die_type (child_die
, cu
);
15138 /* RealView does not mark THIS as const, which the testsuite
15139 expects. GCC marks THIS as const in method definitions,
15140 but not in the class specifications (GCC PR 43053). */
15141 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
15142 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
15145 struct dwarf2_cu
*arg_cu
= cu
;
15146 const char *name
= dwarf2_name (child_die
, cu
);
15148 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
15151 /* If the compiler emits this, use it. */
15152 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
15155 else if (name
&& strcmp (name
, "this") == 0)
15156 /* Function definitions will have the argument names. */
15158 else if (name
== NULL
&& iparams
== 0)
15159 /* Declarations may not have the names, so like
15160 elsewhere in GDB, assume an artificial first
15161 argument is "this". */
15165 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
15169 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
15172 child_die
= sibling_die (child_die
);
15179 static struct type
*
15180 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
15182 struct objfile
*objfile
= cu
->objfile
;
15183 const char *name
= NULL
;
15184 struct type
*this_type
, *target_type
;
15186 name
= dwarf2_full_name (NULL
, die
, cu
);
15187 this_type
= init_type (objfile
, TYPE_CODE_TYPEDEF
, 0, name
);
15188 TYPE_TARGET_STUB (this_type
) = 1;
15189 set_die_type (die
, this_type
, cu
);
15190 target_type
= die_type (die
, cu
);
15191 if (target_type
!= this_type
)
15192 TYPE_TARGET_TYPE (this_type
) = target_type
;
15195 /* Self-referential typedefs are, it seems, not allowed by the DWARF
15196 spec and cause infinite loops in GDB. */
15197 complaint (&symfile_complaints
,
15198 _("Self-referential DW_TAG_typedef "
15199 "- DIE at 0x%x [in module %s]"),
15200 to_underlying (die
->sect_off
), objfile_name (objfile
));
15201 TYPE_TARGET_TYPE (this_type
) = NULL
;
15206 /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT
15207 (which may be different from NAME) to the architecture back-end to allow
15208 it to guess the correct format if necessary. */
15210 static struct type
*
15211 dwarf2_init_float_type (struct objfile
*objfile
, int bits
, const char *name
,
15212 const char *name_hint
)
15214 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15215 const struct floatformat
**format
;
15218 format
= gdbarch_floatformat_for_type (gdbarch
, name_hint
, bits
);
15220 type
= init_float_type (objfile
, bits
, name
, format
);
15222 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
15227 /* Find a representation of a given base type and install
15228 it in the TYPE field of the die. */
15230 static struct type
*
15231 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15233 struct objfile
*objfile
= cu
->objfile
;
15235 struct attribute
*attr
;
15236 int encoding
= 0, bits
= 0;
15239 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
15242 encoding
= DW_UNSND (attr
);
15244 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15247 bits
= DW_UNSND (attr
) * TARGET_CHAR_BIT
;
15249 name
= dwarf2_name (die
, cu
);
15252 complaint (&symfile_complaints
,
15253 _("DW_AT_name missing from DW_TAG_base_type"));
15258 case DW_ATE_address
:
15259 /* Turn DW_ATE_address into a void * pointer. */
15260 type
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
15261 type
= init_pointer_type (objfile
, bits
, name
, type
);
15263 case DW_ATE_boolean
:
15264 type
= init_boolean_type (objfile
, bits
, 1, name
);
15266 case DW_ATE_complex_float
:
15267 type
= dwarf2_init_float_type (objfile
, bits
/ 2, NULL
, name
);
15268 type
= init_complex_type (objfile
, name
, type
);
15270 case DW_ATE_decimal_float
:
15271 type
= init_decfloat_type (objfile
, bits
, name
);
15274 type
= dwarf2_init_float_type (objfile
, bits
, name
, name
);
15276 case DW_ATE_signed
:
15277 type
= init_integer_type (objfile
, bits
, 0, name
);
15279 case DW_ATE_unsigned
:
15280 if (cu
->language
== language_fortran
15282 && startswith (name
, "character("))
15283 type
= init_character_type (objfile
, bits
, 1, name
);
15285 type
= init_integer_type (objfile
, bits
, 1, name
);
15287 case DW_ATE_signed_char
:
15288 if (cu
->language
== language_ada
|| cu
->language
== language_m2
15289 || cu
->language
== language_pascal
15290 || cu
->language
== language_fortran
)
15291 type
= init_character_type (objfile
, bits
, 0, name
);
15293 type
= init_integer_type (objfile
, bits
, 0, name
);
15295 case DW_ATE_unsigned_char
:
15296 if (cu
->language
== language_ada
|| cu
->language
== language_m2
15297 || cu
->language
== language_pascal
15298 || cu
->language
== language_fortran
15299 || cu
->language
== language_rust
)
15300 type
= init_character_type (objfile
, bits
, 1, name
);
15302 type
= init_integer_type (objfile
, bits
, 1, name
);
15306 gdbarch
*arch
= get_objfile_arch (objfile
);
15309 type
= builtin_type (arch
)->builtin_char16
;
15310 else if (bits
== 32)
15311 type
= builtin_type (arch
)->builtin_char32
;
15314 complaint (&symfile_complaints
,
15315 _("unsupported DW_ATE_UTF bit size: '%d'"),
15317 type
= init_integer_type (objfile
, bits
, 1, name
);
15319 return set_die_type (die
, type
, cu
);
15324 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
15325 dwarf_type_encoding_name (encoding
));
15326 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
15330 if (name
&& strcmp (name
, "char") == 0)
15331 TYPE_NOSIGN (type
) = 1;
15333 return set_die_type (die
, type
, cu
);
15336 /* Parse dwarf attribute if it's a block, reference or constant and put the
15337 resulting value of the attribute into struct bound_prop.
15338 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
15341 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
15342 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
)
15344 struct dwarf2_property_baton
*baton
;
15345 struct obstack
*obstack
= &cu
->objfile
->objfile_obstack
;
15347 if (attr
== NULL
|| prop
== NULL
)
15350 if (attr_form_is_block (attr
))
15352 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
15353 baton
->referenced_type
= NULL
;
15354 baton
->locexpr
.per_cu
= cu
->per_cu
;
15355 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
15356 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
15357 prop
->data
.baton
= baton
;
15358 prop
->kind
= PROP_LOCEXPR
;
15359 gdb_assert (prop
->data
.baton
!= NULL
);
15361 else if (attr_form_is_ref (attr
))
15363 struct dwarf2_cu
*target_cu
= cu
;
15364 struct die_info
*target_die
;
15365 struct attribute
*target_attr
;
15367 target_die
= follow_die_ref (die
, attr
, &target_cu
);
15368 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
15369 if (target_attr
== NULL
)
15370 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
15372 if (target_attr
== NULL
)
15375 switch (target_attr
->name
)
15377 case DW_AT_location
:
15378 if (attr_form_is_section_offset (target_attr
))
15380 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
15381 baton
->referenced_type
= die_type (target_die
, target_cu
);
15382 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
15383 prop
->data
.baton
= baton
;
15384 prop
->kind
= PROP_LOCLIST
;
15385 gdb_assert (prop
->data
.baton
!= NULL
);
15387 else if (attr_form_is_block (target_attr
))
15389 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
15390 baton
->referenced_type
= die_type (target_die
, target_cu
);
15391 baton
->locexpr
.per_cu
= cu
->per_cu
;
15392 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
15393 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
15394 prop
->data
.baton
= baton
;
15395 prop
->kind
= PROP_LOCEXPR
;
15396 gdb_assert (prop
->data
.baton
!= NULL
);
15400 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
15401 "dynamic property");
15405 case DW_AT_data_member_location
:
15409 if (!handle_data_member_location (target_die
, target_cu
,
15413 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
15414 baton
->referenced_type
= read_type_die (target_die
->parent
,
15416 baton
->offset_info
.offset
= offset
;
15417 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
15418 prop
->data
.baton
= baton
;
15419 prop
->kind
= PROP_ADDR_OFFSET
;
15424 else if (attr_form_is_constant (attr
))
15426 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
15427 prop
->kind
= PROP_CONST
;
15431 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
15432 dwarf2_name (die
, cu
));
15439 /* Read the given DW_AT_subrange DIE. */
15441 static struct type
*
15442 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15444 struct type
*base_type
, *orig_base_type
;
15445 struct type
*range_type
;
15446 struct attribute
*attr
;
15447 struct dynamic_prop low
, high
;
15448 int low_default_is_valid
;
15449 int high_bound_is_count
= 0;
15451 LONGEST negative_mask
;
15453 orig_base_type
= die_type (die
, cu
);
15454 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
15455 whereas the real type might be. So, we use ORIG_BASE_TYPE when
15456 creating the range type, but we use the result of check_typedef
15457 when examining properties of the type. */
15458 base_type
= check_typedef (orig_base_type
);
15460 /* The die_type call above may have already set the type for this DIE. */
15461 range_type
= get_die_type (die
, cu
);
15465 low
.kind
= PROP_CONST
;
15466 high
.kind
= PROP_CONST
;
15467 high
.data
.const_val
= 0;
15469 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
15470 omitting DW_AT_lower_bound. */
15471 switch (cu
->language
)
15474 case language_cplus
:
15475 low
.data
.const_val
= 0;
15476 low_default_is_valid
= 1;
15478 case language_fortran
:
15479 low
.data
.const_val
= 1;
15480 low_default_is_valid
= 1;
15483 case language_objc
:
15484 case language_rust
:
15485 low
.data
.const_val
= 0;
15486 low_default_is_valid
= (cu
->header
.version
>= 4);
15490 case language_pascal
:
15491 low
.data
.const_val
= 1;
15492 low_default_is_valid
= (cu
->header
.version
>= 4);
15495 low
.data
.const_val
= 0;
15496 low_default_is_valid
= 0;
15500 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
15502 attr_to_dynamic_prop (attr
, die
, cu
, &low
);
15503 else if (!low_default_is_valid
)
15504 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
15505 "- DIE at 0x%x [in module %s]"),
15506 to_underlying (die
->sect_off
), objfile_name (cu
->objfile
));
15508 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
15509 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
))
15511 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
15512 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
))
15514 /* If bounds are constant do the final calculation here. */
15515 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
15516 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
15518 high_bound_is_count
= 1;
15522 /* Dwarf-2 specifications explicitly allows to create subrange types
15523 without specifying a base type.
15524 In that case, the base type must be set to the type of
15525 the lower bound, upper bound or count, in that order, if any of these
15526 three attributes references an object that has a type.
15527 If no base type is found, the Dwarf-2 specifications say that
15528 a signed integer type of size equal to the size of an address should
15530 For the following C code: `extern char gdb_int [];'
15531 GCC produces an empty range DIE.
15532 FIXME: muller/2010-05-28: Possible references to object for low bound,
15533 high bound or count are not yet handled by this code. */
15534 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
15536 struct objfile
*objfile
= cu
->objfile
;
15537 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15538 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
15539 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
15541 /* Test "int", "long int", and "long long int" objfile types,
15542 and select the first one having a size above or equal to the
15543 architecture address size. */
15544 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15545 base_type
= int_type
;
15548 int_type
= objfile_type (objfile
)->builtin_long
;
15549 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15550 base_type
= int_type
;
15553 int_type
= objfile_type (objfile
)->builtin_long_long
;
15554 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15555 base_type
= int_type
;
15560 /* Normally, the DWARF producers are expected to use a signed
15561 constant form (Eg. DW_FORM_sdata) to express negative bounds.
15562 But this is unfortunately not always the case, as witnessed
15563 with GCC, for instance, where the ambiguous DW_FORM_dataN form
15564 is used instead. To work around that ambiguity, we treat
15565 the bounds as signed, and thus sign-extend their values, when
15566 the base type is signed. */
15568 -((LONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
15569 if (low
.kind
== PROP_CONST
15570 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
15571 low
.data
.const_val
|= negative_mask
;
15572 if (high
.kind
== PROP_CONST
15573 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
15574 high
.data
.const_val
|= negative_mask
;
15576 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
);
15578 if (high_bound_is_count
)
15579 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
15581 /* Ada expects an empty array on no boundary attributes. */
15582 if (attr
== NULL
&& cu
->language
!= language_ada
)
15583 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
15585 name
= dwarf2_name (die
, cu
);
15587 TYPE_NAME (range_type
) = name
;
15589 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15591 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
15593 set_die_type (die
, range_type
, cu
);
15595 /* set_die_type should be already done. */
15596 set_descriptive_type (range_type
, die
, cu
);
15601 static struct type
*
15602 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15606 /* For now, we only support the C meaning of an unspecified type: void. */
15608 type
= init_type (cu
->objfile
, TYPE_CODE_VOID
, 0, NULL
);
15609 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
15611 return set_die_type (die
, type
, cu
);
15614 /* Read a single die and all its descendents. Set the die's sibling
15615 field to NULL; set other fields in the die correctly, and set all
15616 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
15617 location of the info_ptr after reading all of those dies. PARENT
15618 is the parent of the die in question. */
15620 static struct die_info
*
15621 read_die_and_children (const struct die_reader_specs
*reader
,
15622 const gdb_byte
*info_ptr
,
15623 const gdb_byte
**new_info_ptr
,
15624 struct die_info
*parent
)
15626 struct die_info
*die
;
15627 const gdb_byte
*cur_ptr
;
15630 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
15633 *new_info_ptr
= cur_ptr
;
15636 store_in_ref_table (die
, reader
->cu
);
15639 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
15643 *new_info_ptr
= cur_ptr
;
15646 die
->sibling
= NULL
;
15647 die
->parent
= parent
;
15651 /* Read a die, all of its descendents, and all of its siblings; set
15652 all of the fields of all of the dies correctly. Arguments are as
15653 in read_die_and_children. */
15655 static struct die_info
*
15656 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
15657 const gdb_byte
*info_ptr
,
15658 const gdb_byte
**new_info_ptr
,
15659 struct die_info
*parent
)
15661 struct die_info
*first_die
, *last_sibling
;
15662 const gdb_byte
*cur_ptr
;
15664 cur_ptr
= info_ptr
;
15665 first_die
= last_sibling
= NULL
;
15669 struct die_info
*die
15670 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
15674 *new_info_ptr
= cur_ptr
;
15681 last_sibling
->sibling
= die
;
15683 last_sibling
= die
;
15687 /* Read a die, all of its descendents, and all of its siblings; set
15688 all of the fields of all of the dies correctly. Arguments are as
15689 in read_die_and_children.
15690 This the main entry point for reading a DIE and all its children. */
15692 static struct die_info
*
15693 read_die_and_siblings (const struct die_reader_specs
*reader
,
15694 const gdb_byte
*info_ptr
,
15695 const gdb_byte
**new_info_ptr
,
15696 struct die_info
*parent
)
15698 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
15699 new_info_ptr
, parent
);
15701 if (dwarf_die_debug
)
15703 fprintf_unfiltered (gdb_stdlog
,
15704 "Read die from %s@0x%x of %s:\n",
15705 get_section_name (reader
->die_section
),
15706 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
15707 bfd_get_filename (reader
->abfd
));
15708 dump_die (die
, dwarf_die_debug
);
15714 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
15716 The caller is responsible for filling in the extra attributes
15717 and updating (*DIEP)->num_attrs.
15718 Set DIEP to point to a newly allocated die with its information,
15719 except for its child, sibling, and parent fields.
15720 Set HAS_CHILDREN to tell whether the die has children or not. */
15722 static const gdb_byte
*
15723 read_full_die_1 (const struct die_reader_specs
*reader
,
15724 struct die_info
**diep
, const gdb_byte
*info_ptr
,
15725 int *has_children
, int num_extra_attrs
)
15727 unsigned int abbrev_number
, bytes_read
, i
;
15728 struct abbrev_info
*abbrev
;
15729 struct die_info
*die
;
15730 struct dwarf2_cu
*cu
= reader
->cu
;
15731 bfd
*abfd
= reader
->abfd
;
15733 sect_offset sect_off
= (sect_offset
) (info_ptr
- reader
->buffer
);
15734 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
15735 info_ptr
+= bytes_read
;
15736 if (!abbrev_number
)
15743 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
15745 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
15747 bfd_get_filename (abfd
));
15749 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
15750 die
->sect_off
= sect_off
;
15751 die
->tag
= abbrev
->tag
;
15752 die
->abbrev
= abbrev_number
;
15754 /* Make the result usable.
15755 The caller needs to update num_attrs after adding the extra
15757 die
->num_attrs
= abbrev
->num_attrs
;
15759 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
15760 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
15764 *has_children
= abbrev
->has_children
;
15768 /* Read a die and all its attributes.
15769 Set DIEP to point to a newly allocated die with its information,
15770 except for its child, sibling, and parent fields.
15771 Set HAS_CHILDREN to tell whether the die has children or not. */
15773 static const gdb_byte
*
15774 read_full_die (const struct die_reader_specs
*reader
,
15775 struct die_info
**diep
, const gdb_byte
*info_ptr
,
15778 const gdb_byte
*result
;
15780 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
15782 if (dwarf_die_debug
)
15784 fprintf_unfiltered (gdb_stdlog
,
15785 "Read die from %s@0x%x of %s:\n",
15786 get_section_name (reader
->die_section
),
15787 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
15788 bfd_get_filename (reader
->abfd
));
15789 dump_die (*diep
, dwarf_die_debug
);
15795 /* Abbreviation tables.
15797 In DWARF version 2, the description of the debugging information is
15798 stored in a separate .debug_abbrev section. Before we read any
15799 dies from a section we read in all abbreviations and install them
15800 in a hash table. */
15802 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
15804 static struct abbrev_info
*
15805 abbrev_table_alloc_abbrev (struct abbrev_table
*abbrev_table
)
15807 struct abbrev_info
*abbrev
;
15809 abbrev
= XOBNEW (&abbrev_table
->abbrev_obstack
, struct abbrev_info
);
15810 memset (abbrev
, 0, sizeof (struct abbrev_info
));
15815 /* Add an abbreviation to the table. */
15818 abbrev_table_add_abbrev (struct abbrev_table
*abbrev_table
,
15819 unsigned int abbrev_number
,
15820 struct abbrev_info
*abbrev
)
15822 unsigned int hash_number
;
15824 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15825 abbrev
->next
= abbrev_table
->abbrevs
[hash_number
];
15826 abbrev_table
->abbrevs
[hash_number
] = abbrev
;
15829 /* Look up an abbrev in the table.
15830 Returns NULL if the abbrev is not found. */
15832 static struct abbrev_info
*
15833 abbrev_table_lookup_abbrev (const struct abbrev_table
*abbrev_table
,
15834 unsigned int abbrev_number
)
15836 unsigned int hash_number
;
15837 struct abbrev_info
*abbrev
;
15839 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15840 abbrev
= abbrev_table
->abbrevs
[hash_number
];
15844 if (abbrev
->number
== abbrev_number
)
15846 abbrev
= abbrev
->next
;
15851 /* Read in an abbrev table. */
15853 static struct abbrev_table
*
15854 abbrev_table_read_table (struct dwarf2_section_info
*section
,
15855 sect_offset sect_off
)
15857 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
15858 bfd
*abfd
= get_section_bfd_owner (section
);
15859 struct abbrev_table
*abbrev_table
;
15860 const gdb_byte
*abbrev_ptr
;
15861 struct abbrev_info
*cur_abbrev
;
15862 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
15863 unsigned int abbrev_form
;
15864 struct attr_abbrev
*cur_attrs
;
15865 unsigned int allocated_attrs
;
15867 abbrev_table
= XNEW (struct abbrev_table
);
15868 abbrev_table
->sect_off
= sect_off
;
15869 obstack_init (&abbrev_table
->abbrev_obstack
);
15870 abbrev_table
->abbrevs
=
15871 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct abbrev_info
*,
15873 memset (abbrev_table
->abbrevs
, 0,
15874 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
15876 dwarf2_read_section (objfile
, section
);
15877 abbrev_ptr
= section
->buffer
+ to_underlying (sect_off
);
15878 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15879 abbrev_ptr
+= bytes_read
;
15881 allocated_attrs
= ATTR_ALLOC_CHUNK
;
15882 cur_attrs
= XNEWVEC (struct attr_abbrev
, allocated_attrs
);
15884 /* Loop until we reach an abbrev number of 0. */
15885 while (abbrev_number
)
15887 cur_abbrev
= abbrev_table_alloc_abbrev (abbrev_table
);
15889 /* read in abbrev header */
15890 cur_abbrev
->number
= abbrev_number
;
15892 = (enum dwarf_tag
) read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15893 abbrev_ptr
+= bytes_read
;
15894 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
15897 /* now read in declarations */
15900 LONGEST implicit_const
;
15902 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15903 abbrev_ptr
+= bytes_read
;
15904 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15905 abbrev_ptr
+= bytes_read
;
15906 if (abbrev_form
== DW_FORM_implicit_const
)
15908 implicit_const
= read_signed_leb128 (abfd
, abbrev_ptr
,
15910 abbrev_ptr
+= bytes_read
;
15914 /* Initialize it due to a false compiler warning. */
15915 implicit_const
= -1;
15918 if (abbrev_name
== 0)
15921 if (cur_abbrev
->num_attrs
== allocated_attrs
)
15923 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
15925 = XRESIZEVEC (struct attr_abbrev
, cur_attrs
, allocated_attrs
);
15928 cur_attrs
[cur_abbrev
->num_attrs
].name
15929 = (enum dwarf_attribute
) abbrev_name
;
15930 cur_attrs
[cur_abbrev
->num_attrs
].form
15931 = (enum dwarf_form
) abbrev_form
;
15932 cur_attrs
[cur_abbrev
->num_attrs
].implicit_const
= implicit_const
;
15933 ++cur_abbrev
->num_attrs
;
15936 cur_abbrev
->attrs
=
15937 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct attr_abbrev
,
15938 cur_abbrev
->num_attrs
);
15939 memcpy (cur_abbrev
->attrs
, cur_attrs
,
15940 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
15942 abbrev_table_add_abbrev (abbrev_table
, abbrev_number
, cur_abbrev
);
15944 /* Get next abbreviation.
15945 Under Irix6 the abbreviations for a compilation unit are not
15946 always properly terminated with an abbrev number of 0.
15947 Exit loop if we encounter an abbreviation which we have
15948 already read (which means we are about to read the abbreviations
15949 for the next compile unit) or if the end of the abbreviation
15950 table is reached. */
15951 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
15953 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15954 abbrev_ptr
+= bytes_read
;
15955 if (abbrev_table_lookup_abbrev (abbrev_table
, abbrev_number
) != NULL
)
15960 return abbrev_table
;
15963 /* Free the resources held by ABBREV_TABLE. */
15966 abbrev_table_free (struct abbrev_table
*abbrev_table
)
15968 obstack_free (&abbrev_table
->abbrev_obstack
, NULL
);
15969 xfree (abbrev_table
);
15972 /* Same as abbrev_table_free but as a cleanup.
15973 We pass in a pointer to the pointer to the table so that we can
15974 set the pointer to NULL when we're done. It also simplifies
15975 build_type_psymtabs_1. */
15978 abbrev_table_free_cleanup (void *table_ptr
)
15980 struct abbrev_table
**abbrev_table_ptr
= (struct abbrev_table
**) table_ptr
;
15982 if (*abbrev_table_ptr
!= NULL
)
15983 abbrev_table_free (*abbrev_table_ptr
);
15984 *abbrev_table_ptr
= NULL
;
15987 /* Read the abbrev table for CU from ABBREV_SECTION. */
15990 dwarf2_read_abbrevs (struct dwarf2_cu
*cu
,
15991 struct dwarf2_section_info
*abbrev_section
)
15994 abbrev_table_read_table (abbrev_section
, cu
->header
.abbrev_sect_off
);
15997 /* Release the memory used by the abbrev table for a compilation unit. */
16000 dwarf2_free_abbrev_table (void *ptr_to_cu
)
16002 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr_to_cu
;
16004 if (cu
->abbrev_table
!= NULL
)
16005 abbrev_table_free (cu
->abbrev_table
);
16006 /* Set this to NULL so that we SEGV if we try to read it later,
16007 and also because free_comp_unit verifies this is NULL. */
16008 cu
->abbrev_table
= NULL
;
16011 /* Returns nonzero if TAG represents a type that we might generate a partial
16015 is_type_tag_for_partial (int tag
)
16020 /* Some types that would be reasonable to generate partial symbols for,
16021 that we don't at present. */
16022 case DW_TAG_array_type
:
16023 case DW_TAG_file_type
:
16024 case DW_TAG_ptr_to_member_type
:
16025 case DW_TAG_set_type
:
16026 case DW_TAG_string_type
:
16027 case DW_TAG_subroutine_type
:
16029 case DW_TAG_base_type
:
16030 case DW_TAG_class_type
:
16031 case DW_TAG_interface_type
:
16032 case DW_TAG_enumeration_type
:
16033 case DW_TAG_structure_type
:
16034 case DW_TAG_subrange_type
:
16035 case DW_TAG_typedef
:
16036 case DW_TAG_union_type
:
16043 /* Load all DIEs that are interesting for partial symbols into memory. */
16045 static struct partial_die_info
*
16046 load_partial_dies (const struct die_reader_specs
*reader
,
16047 const gdb_byte
*info_ptr
, int building_psymtab
)
16049 struct dwarf2_cu
*cu
= reader
->cu
;
16050 struct objfile
*objfile
= cu
->objfile
;
16051 struct partial_die_info
*part_die
;
16052 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
16053 struct abbrev_info
*abbrev
;
16054 unsigned int bytes_read
;
16055 unsigned int load_all
= 0;
16056 int nesting_level
= 1;
16061 gdb_assert (cu
->per_cu
!= NULL
);
16062 if (cu
->per_cu
->load_all_dies
)
16066 = htab_create_alloc_ex (cu
->header
.length
/ 12,
16070 &cu
->comp_unit_obstack
,
16071 hashtab_obstack_allocate
,
16072 dummy_obstack_deallocate
);
16074 part_die
= XOBNEW (&cu
->comp_unit_obstack
, struct partial_die_info
);
16078 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
16080 /* A NULL abbrev means the end of a series of children. */
16081 if (abbrev
== NULL
)
16083 if (--nesting_level
== 0)
16085 /* PART_DIE was probably the last thing allocated on the
16086 comp_unit_obstack, so we could call obstack_free
16087 here. We don't do that because the waste is small,
16088 and will be cleaned up when we're done with this
16089 compilation unit. This way, we're also more robust
16090 against other users of the comp_unit_obstack. */
16093 info_ptr
+= bytes_read
;
16094 last_die
= parent_die
;
16095 parent_die
= parent_die
->die_parent
;
16099 /* Check for template arguments. We never save these; if
16100 they're seen, we just mark the parent, and go on our way. */
16101 if (parent_die
!= NULL
16102 && cu
->language
== language_cplus
16103 && (abbrev
->tag
== DW_TAG_template_type_param
16104 || abbrev
->tag
== DW_TAG_template_value_param
))
16106 parent_die
->has_template_arguments
= 1;
16110 /* We don't need a partial DIE for the template argument. */
16111 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
16116 /* We only recurse into c++ subprograms looking for template arguments.
16117 Skip their other children. */
16119 && cu
->language
== language_cplus
16120 && parent_die
!= NULL
16121 && parent_die
->tag
== DW_TAG_subprogram
)
16123 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
16127 /* Check whether this DIE is interesting enough to save. Normally
16128 we would not be interested in members here, but there may be
16129 later variables referencing them via DW_AT_specification (for
16130 static members). */
16132 && !is_type_tag_for_partial (abbrev
->tag
)
16133 && abbrev
->tag
!= DW_TAG_constant
16134 && abbrev
->tag
!= DW_TAG_enumerator
16135 && abbrev
->tag
!= DW_TAG_subprogram
16136 && abbrev
->tag
!= DW_TAG_lexical_block
16137 && abbrev
->tag
!= DW_TAG_variable
16138 && abbrev
->tag
!= DW_TAG_namespace
16139 && abbrev
->tag
!= DW_TAG_module
16140 && abbrev
->tag
!= DW_TAG_member
16141 && abbrev
->tag
!= DW_TAG_imported_unit
16142 && abbrev
->tag
!= DW_TAG_imported_declaration
)
16144 /* Otherwise we skip to the next sibling, if any. */
16145 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
16149 info_ptr
= read_partial_die (reader
, part_die
, abbrev
, bytes_read
,
16152 /* This two-pass algorithm for processing partial symbols has a
16153 high cost in cache pressure. Thus, handle some simple cases
16154 here which cover the majority of C partial symbols. DIEs
16155 which neither have specification tags in them, nor could have
16156 specification tags elsewhere pointing at them, can simply be
16157 processed and discarded.
16159 This segment is also optional; scan_partial_symbols and
16160 add_partial_symbol will handle these DIEs if we chain
16161 them in normally. When compilers which do not emit large
16162 quantities of duplicate debug information are more common,
16163 this code can probably be removed. */
16165 /* Any complete simple types at the top level (pretty much all
16166 of them, for a language without namespaces), can be processed
16168 if (parent_die
== NULL
16169 && part_die
->has_specification
== 0
16170 && part_die
->is_declaration
== 0
16171 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
16172 || part_die
->tag
== DW_TAG_base_type
16173 || part_die
->tag
== DW_TAG_subrange_type
))
16175 if (building_psymtab
&& part_die
->name
!= NULL
)
16176 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
16177 VAR_DOMAIN
, LOC_TYPEDEF
,
16178 &objfile
->static_psymbols
,
16179 0, cu
->language
, objfile
);
16180 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
16184 /* The exception for DW_TAG_typedef with has_children above is
16185 a workaround of GCC PR debug/47510. In the case of this complaint
16186 type_name_no_tag_or_error will error on such types later.
16188 GDB skipped children of DW_TAG_typedef by the shortcut above and then
16189 it could not find the child DIEs referenced later, this is checked
16190 above. In correct DWARF DW_TAG_typedef should have no children. */
16192 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
16193 complaint (&symfile_complaints
,
16194 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
16195 "- DIE at 0x%x [in module %s]"),
16196 to_underlying (part_die
->sect_off
), objfile_name (objfile
));
16198 /* If we're at the second level, and we're an enumerator, and
16199 our parent has no specification (meaning possibly lives in a
16200 namespace elsewhere), then we can add the partial symbol now
16201 instead of queueing it. */
16202 if (part_die
->tag
== DW_TAG_enumerator
16203 && parent_die
!= NULL
16204 && parent_die
->die_parent
== NULL
16205 && parent_die
->tag
== DW_TAG_enumeration_type
16206 && parent_die
->has_specification
== 0)
16208 if (part_die
->name
== NULL
)
16209 complaint (&symfile_complaints
,
16210 _("malformed enumerator DIE ignored"));
16211 else if (building_psymtab
)
16212 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
16213 VAR_DOMAIN
, LOC_CONST
,
16214 cu
->language
== language_cplus
16215 ? &objfile
->global_psymbols
16216 : &objfile
->static_psymbols
,
16217 0, cu
->language
, objfile
);
16219 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
16223 /* We'll save this DIE so link it in. */
16224 part_die
->die_parent
= parent_die
;
16225 part_die
->die_sibling
= NULL
;
16226 part_die
->die_child
= NULL
;
16228 if (last_die
&& last_die
== parent_die
)
16229 last_die
->die_child
= part_die
;
16231 last_die
->die_sibling
= part_die
;
16233 last_die
= part_die
;
16235 if (first_die
== NULL
)
16236 first_die
= part_die
;
16238 /* Maybe add the DIE to the hash table. Not all DIEs that we
16239 find interesting need to be in the hash table, because we
16240 also have the parent/sibling/child chains; only those that we
16241 might refer to by offset later during partial symbol reading.
16243 For now this means things that might have be the target of a
16244 DW_AT_specification, DW_AT_abstract_origin, or
16245 DW_AT_extension. DW_AT_extension will refer only to
16246 namespaces; DW_AT_abstract_origin refers to functions (and
16247 many things under the function DIE, but we do not recurse
16248 into function DIEs during partial symbol reading) and
16249 possibly variables as well; DW_AT_specification refers to
16250 declarations. Declarations ought to have the DW_AT_declaration
16251 flag. It happens that GCC forgets to put it in sometimes, but
16252 only for functions, not for types.
16254 Adding more things than necessary to the hash table is harmless
16255 except for the performance cost. Adding too few will result in
16256 wasted time in find_partial_die, when we reread the compilation
16257 unit with load_all_dies set. */
16260 || abbrev
->tag
== DW_TAG_constant
16261 || abbrev
->tag
== DW_TAG_subprogram
16262 || abbrev
->tag
== DW_TAG_variable
16263 || abbrev
->tag
== DW_TAG_namespace
16264 || part_die
->is_declaration
)
16268 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
16269 to_underlying (part_die
->sect_off
),
16274 part_die
= XOBNEW (&cu
->comp_unit_obstack
, struct partial_die_info
);
16276 /* For some DIEs we want to follow their children (if any). For C
16277 we have no reason to follow the children of structures; for other
16278 languages we have to, so that we can get at method physnames
16279 to infer fully qualified class names, for DW_AT_specification,
16280 and for C++ template arguments. For C++, we also look one level
16281 inside functions to find template arguments (if the name of the
16282 function does not already contain the template arguments).
16284 For Ada, we need to scan the children of subprograms and lexical
16285 blocks as well because Ada allows the definition of nested
16286 entities that could be interesting for the debugger, such as
16287 nested subprograms for instance. */
16288 if (last_die
->has_children
16290 || last_die
->tag
== DW_TAG_namespace
16291 || last_die
->tag
== DW_TAG_module
16292 || last_die
->tag
== DW_TAG_enumeration_type
16293 || (cu
->language
== language_cplus
16294 && last_die
->tag
== DW_TAG_subprogram
16295 && (last_die
->name
== NULL
16296 || strchr (last_die
->name
, '<') == NULL
))
16297 || (cu
->language
!= language_c
16298 && (last_die
->tag
== DW_TAG_class_type
16299 || last_die
->tag
== DW_TAG_interface_type
16300 || last_die
->tag
== DW_TAG_structure_type
16301 || last_die
->tag
== DW_TAG_union_type
))
16302 || (cu
->language
== language_ada
16303 && (last_die
->tag
== DW_TAG_subprogram
16304 || last_die
->tag
== DW_TAG_lexical_block
))))
16307 parent_die
= last_die
;
16311 /* Otherwise we skip to the next sibling, if any. */
16312 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
16314 /* Back to the top, do it again. */
16318 /* Read a minimal amount of information into the minimal die structure. */
16320 static const gdb_byte
*
16321 read_partial_die (const struct die_reader_specs
*reader
,
16322 struct partial_die_info
*part_die
,
16323 struct abbrev_info
*abbrev
, unsigned int abbrev_len
,
16324 const gdb_byte
*info_ptr
)
16326 struct dwarf2_cu
*cu
= reader
->cu
;
16327 struct objfile
*objfile
= cu
->objfile
;
16328 const gdb_byte
*buffer
= reader
->buffer
;
16330 struct attribute attr
;
16331 int has_low_pc_attr
= 0;
16332 int has_high_pc_attr
= 0;
16333 int high_pc_relative
= 0;
16335 memset (part_die
, 0, sizeof (struct partial_die_info
));
16337 part_die
->sect_off
= (sect_offset
) (info_ptr
- buffer
);
16339 info_ptr
+= abbrev_len
;
16341 if (abbrev
== NULL
)
16344 part_die
->tag
= abbrev
->tag
;
16345 part_die
->has_children
= abbrev
->has_children
;
16347 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
16349 info_ptr
= read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
16351 /* Store the data if it is of an attribute we want to keep in a
16352 partial symbol table. */
16356 switch (part_die
->tag
)
16358 case DW_TAG_compile_unit
:
16359 case DW_TAG_partial_unit
:
16360 case DW_TAG_type_unit
:
16361 /* Compilation units have a DW_AT_name that is a filename, not
16362 a source language identifier. */
16363 case DW_TAG_enumeration_type
:
16364 case DW_TAG_enumerator
:
16365 /* These tags always have simple identifiers already; no need
16366 to canonicalize them. */
16367 part_die
->name
= DW_STRING (&attr
);
16371 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
16372 &objfile
->per_bfd
->storage_obstack
);
16376 case DW_AT_linkage_name
:
16377 case DW_AT_MIPS_linkage_name
:
16378 /* Note that both forms of linkage name might appear. We
16379 assume they will be the same, and we only store the last
16381 if (cu
->language
== language_ada
)
16382 part_die
->name
= DW_STRING (&attr
);
16383 part_die
->linkage_name
= DW_STRING (&attr
);
16386 has_low_pc_attr
= 1;
16387 part_die
->lowpc
= attr_value_as_address (&attr
);
16389 case DW_AT_high_pc
:
16390 has_high_pc_attr
= 1;
16391 part_die
->highpc
= attr_value_as_address (&attr
);
16392 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
16393 high_pc_relative
= 1;
16395 case DW_AT_location
:
16396 /* Support the .debug_loc offsets. */
16397 if (attr_form_is_block (&attr
))
16399 part_die
->d
.locdesc
= DW_BLOCK (&attr
);
16401 else if (attr_form_is_section_offset (&attr
))
16403 dwarf2_complex_location_expr_complaint ();
16407 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
16408 "partial symbol information");
16411 case DW_AT_external
:
16412 part_die
->is_external
= DW_UNSND (&attr
);
16414 case DW_AT_declaration
:
16415 part_die
->is_declaration
= DW_UNSND (&attr
);
16418 part_die
->has_type
= 1;
16420 case DW_AT_abstract_origin
:
16421 case DW_AT_specification
:
16422 case DW_AT_extension
:
16423 part_die
->has_specification
= 1;
16424 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
16425 part_die
->spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
16426 || cu
->per_cu
->is_dwz
);
16428 case DW_AT_sibling
:
16429 /* Ignore absolute siblings, they might point outside of
16430 the current compile unit. */
16431 if (attr
.form
== DW_FORM_ref_addr
)
16432 complaint (&symfile_complaints
,
16433 _("ignoring absolute DW_AT_sibling"));
16436 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
16437 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
16439 if (sibling_ptr
< info_ptr
)
16440 complaint (&symfile_complaints
,
16441 _("DW_AT_sibling points backwards"));
16442 else if (sibling_ptr
> reader
->buffer_end
)
16443 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
16445 part_die
->sibling
= sibling_ptr
;
16448 case DW_AT_byte_size
:
16449 part_die
->has_byte_size
= 1;
16451 case DW_AT_const_value
:
16452 part_die
->has_const_value
= 1;
16454 case DW_AT_calling_convention
:
16455 /* DWARF doesn't provide a way to identify a program's source-level
16456 entry point. DW_AT_calling_convention attributes are only meant
16457 to describe functions' calling conventions.
16459 However, because it's a necessary piece of information in
16460 Fortran, and before DWARF 4 DW_CC_program was the only
16461 piece of debugging information whose definition refers to
16462 a 'main program' at all, several compilers marked Fortran
16463 main programs with DW_CC_program --- even when those
16464 functions use the standard calling conventions.
16466 Although DWARF now specifies a way to provide this
16467 information, we support this practice for backward
16469 if (DW_UNSND (&attr
) == DW_CC_program
16470 && cu
->language
== language_fortran
)
16471 part_die
->main_subprogram
= 1;
16474 if (DW_UNSND (&attr
) == DW_INL_inlined
16475 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
16476 part_die
->may_be_inlined
= 1;
16480 if (part_die
->tag
== DW_TAG_imported_unit
)
16482 part_die
->d
.sect_off
= dwarf2_get_ref_die_offset (&attr
);
16483 part_die
->is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
16484 || cu
->per_cu
->is_dwz
);
16488 case DW_AT_main_subprogram
:
16489 part_die
->main_subprogram
= DW_UNSND (&attr
);
16497 if (high_pc_relative
)
16498 part_die
->highpc
+= part_die
->lowpc
;
16500 if (has_low_pc_attr
&& has_high_pc_attr
)
16502 /* When using the GNU linker, .gnu.linkonce. sections are used to
16503 eliminate duplicate copies of functions and vtables and such.
16504 The linker will arbitrarily choose one and discard the others.
16505 The AT_*_pc values for such functions refer to local labels in
16506 these sections. If the section from that file was discarded, the
16507 labels are not in the output, so the relocs get a value of 0.
16508 If this is a discarded function, mark the pc bounds as invalid,
16509 so that GDB will ignore it. */
16510 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
16512 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
16514 complaint (&symfile_complaints
,
16515 _("DW_AT_low_pc %s is zero "
16516 "for DIE at 0x%x [in module %s]"),
16517 paddress (gdbarch
, part_die
->lowpc
),
16518 to_underlying (part_die
->sect_off
), objfile_name (objfile
));
16520 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
16521 else if (part_die
->lowpc
>= part_die
->highpc
)
16523 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
16525 complaint (&symfile_complaints
,
16526 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
16527 "for DIE at 0x%x [in module %s]"),
16528 paddress (gdbarch
, part_die
->lowpc
),
16529 paddress (gdbarch
, part_die
->highpc
),
16530 to_underlying (part_die
->sect_off
),
16531 objfile_name (objfile
));
16534 part_die
->has_pc_info
= 1;
16540 /* Find a cached partial DIE at OFFSET in CU. */
16542 static struct partial_die_info
*
16543 find_partial_die_in_comp_unit (sect_offset sect_off
, struct dwarf2_cu
*cu
)
16545 struct partial_die_info
*lookup_die
= NULL
;
16546 struct partial_die_info part_die
;
16548 part_die
.sect_off
= sect_off
;
16549 lookup_die
= ((struct partial_die_info
*)
16550 htab_find_with_hash (cu
->partial_dies
, &part_die
,
16551 to_underlying (sect_off
)));
16556 /* Find a partial DIE at OFFSET, which may or may not be in CU,
16557 except in the case of .debug_types DIEs which do not reference
16558 outside their CU (they do however referencing other types via
16559 DW_FORM_ref_sig8). */
16561 static struct partial_die_info
*
16562 find_partial_die (sect_offset sect_off
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
16564 struct objfile
*objfile
= cu
->objfile
;
16565 struct dwarf2_per_cu_data
*per_cu
= NULL
;
16566 struct partial_die_info
*pd
= NULL
;
16568 if (offset_in_dwz
== cu
->per_cu
->is_dwz
16569 && offset_in_cu_p (&cu
->header
, sect_off
))
16571 pd
= find_partial_die_in_comp_unit (sect_off
, cu
);
16574 /* We missed recording what we needed.
16575 Load all dies and try again. */
16576 per_cu
= cu
->per_cu
;
16580 /* TUs don't reference other CUs/TUs (except via type signatures). */
16581 if (cu
->per_cu
->is_debug_types
)
16583 error (_("Dwarf Error: Type Unit at offset 0x%x contains"
16584 " external reference to offset 0x%x [in module %s].\n"),
16585 to_underlying (cu
->header
.sect_off
), to_underlying (sect_off
),
16586 bfd_get_filename (objfile
->obfd
));
16588 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
16591 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
16592 load_partial_comp_unit (per_cu
);
16594 per_cu
->cu
->last_used
= 0;
16595 pd
= find_partial_die_in_comp_unit (sect_off
, per_cu
->cu
);
16598 /* If we didn't find it, and not all dies have been loaded,
16599 load them all and try again. */
16601 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
16603 per_cu
->load_all_dies
= 1;
16605 /* This is nasty. When we reread the DIEs, somewhere up the call chain
16606 THIS_CU->cu may already be in use. So we can't just free it and
16607 replace its DIEs with the ones we read in. Instead, we leave those
16608 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
16609 and clobber THIS_CU->cu->partial_dies with the hash table for the new
16611 load_partial_comp_unit (per_cu
);
16613 pd
= find_partial_die_in_comp_unit (sect_off
, per_cu
->cu
);
16617 internal_error (__FILE__
, __LINE__
,
16618 _("could not find partial DIE 0x%x "
16619 "in cache [from module %s]\n"),
16620 to_underlying (sect_off
), bfd_get_filename (objfile
->obfd
));
16624 /* See if we can figure out if the class lives in a namespace. We do
16625 this by looking for a member function; its demangled name will
16626 contain namespace info, if there is any. */
16629 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
16630 struct dwarf2_cu
*cu
)
16632 /* NOTE: carlton/2003-10-07: Getting the info this way changes
16633 what template types look like, because the demangler
16634 frequently doesn't give the same name as the debug info. We
16635 could fix this by only using the demangled name to get the
16636 prefix (but see comment in read_structure_type). */
16638 struct partial_die_info
*real_pdi
;
16639 struct partial_die_info
*child_pdi
;
16641 /* If this DIE (this DIE's specification, if any) has a parent, then
16642 we should not do this. We'll prepend the parent's fully qualified
16643 name when we create the partial symbol. */
16645 real_pdi
= struct_pdi
;
16646 while (real_pdi
->has_specification
)
16647 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
16648 real_pdi
->spec_is_dwz
, cu
);
16650 if (real_pdi
->die_parent
!= NULL
)
16653 for (child_pdi
= struct_pdi
->die_child
;
16655 child_pdi
= child_pdi
->die_sibling
)
16657 if (child_pdi
->tag
== DW_TAG_subprogram
16658 && child_pdi
->linkage_name
!= NULL
)
16660 char *actual_class_name
16661 = language_class_name_from_physname (cu
->language_defn
,
16662 child_pdi
->linkage_name
);
16663 if (actual_class_name
!= NULL
)
16667 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
16669 strlen (actual_class_name
)));
16670 xfree (actual_class_name
);
16677 /* Adjust PART_DIE before generating a symbol for it. This function
16678 may set the is_external flag or change the DIE's name. */
16681 fixup_partial_die (struct partial_die_info
*part_die
,
16682 struct dwarf2_cu
*cu
)
16684 /* Once we've fixed up a die, there's no point in doing so again.
16685 This also avoids a memory leak if we were to call
16686 guess_partial_die_structure_name multiple times. */
16687 if (part_die
->fixup_called
)
16690 /* If we found a reference attribute and the DIE has no name, try
16691 to find a name in the referred to DIE. */
16693 if (part_die
->name
== NULL
&& part_die
->has_specification
)
16695 struct partial_die_info
*spec_die
;
16697 spec_die
= find_partial_die (part_die
->spec_offset
,
16698 part_die
->spec_is_dwz
, cu
);
16700 fixup_partial_die (spec_die
, cu
);
16702 if (spec_die
->name
)
16704 part_die
->name
= spec_die
->name
;
16706 /* Copy DW_AT_external attribute if it is set. */
16707 if (spec_die
->is_external
)
16708 part_die
->is_external
= spec_die
->is_external
;
16712 /* Set default names for some unnamed DIEs. */
16714 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
16715 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
16717 /* If there is no parent die to provide a namespace, and there are
16718 children, see if we can determine the namespace from their linkage
16720 if (cu
->language
== language_cplus
16721 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
16722 && part_die
->die_parent
== NULL
16723 && part_die
->has_children
16724 && (part_die
->tag
== DW_TAG_class_type
16725 || part_die
->tag
== DW_TAG_structure_type
16726 || part_die
->tag
== DW_TAG_union_type
))
16727 guess_partial_die_structure_name (part_die
, cu
);
16729 /* GCC might emit a nameless struct or union that has a linkage
16730 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
16731 if (part_die
->name
== NULL
16732 && (part_die
->tag
== DW_TAG_class_type
16733 || part_die
->tag
== DW_TAG_interface_type
16734 || part_die
->tag
== DW_TAG_structure_type
16735 || part_die
->tag
== DW_TAG_union_type
)
16736 && part_die
->linkage_name
!= NULL
)
16740 demangled
= gdb_demangle (part_die
->linkage_name
, DMGL_TYPES
);
16745 /* Strip any leading namespaces/classes, keep only the base name.
16746 DW_AT_name for named DIEs does not contain the prefixes. */
16747 base
= strrchr (demangled
, ':');
16748 if (base
&& base
> demangled
&& base
[-1] == ':')
16755 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
16756 base
, strlen (base
)));
16761 part_die
->fixup_called
= 1;
16764 /* Read an attribute value described by an attribute form. */
16766 static const gdb_byte
*
16767 read_attribute_value (const struct die_reader_specs
*reader
,
16768 struct attribute
*attr
, unsigned form
,
16769 LONGEST implicit_const
, const gdb_byte
*info_ptr
)
16771 struct dwarf2_cu
*cu
= reader
->cu
;
16772 struct objfile
*objfile
= cu
->objfile
;
16773 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
16774 bfd
*abfd
= reader
->abfd
;
16775 struct comp_unit_head
*cu_header
= &cu
->header
;
16776 unsigned int bytes_read
;
16777 struct dwarf_block
*blk
;
16779 attr
->form
= (enum dwarf_form
) form
;
16782 case DW_FORM_ref_addr
:
16783 if (cu
->header
.version
== 2)
16784 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
16786 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
16787 &cu
->header
, &bytes_read
);
16788 info_ptr
+= bytes_read
;
16790 case DW_FORM_GNU_ref_alt
:
16791 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
16792 info_ptr
+= bytes_read
;
16795 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
16796 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
16797 info_ptr
+= bytes_read
;
16799 case DW_FORM_block2
:
16800 blk
= dwarf_alloc_block (cu
);
16801 blk
->size
= read_2_bytes (abfd
, info_ptr
);
16803 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16804 info_ptr
+= blk
->size
;
16805 DW_BLOCK (attr
) = blk
;
16807 case DW_FORM_block4
:
16808 blk
= dwarf_alloc_block (cu
);
16809 blk
->size
= read_4_bytes (abfd
, info_ptr
);
16811 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16812 info_ptr
+= blk
->size
;
16813 DW_BLOCK (attr
) = blk
;
16815 case DW_FORM_data2
:
16816 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
16819 case DW_FORM_data4
:
16820 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
16823 case DW_FORM_data8
:
16824 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
16827 case DW_FORM_data16
:
16828 blk
= dwarf_alloc_block (cu
);
16830 blk
->data
= read_n_bytes (abfd
, info_ptr
, 16);
16832 DW_BLOCK (attr
) = blk
;
16834 case DW_FORM_sec_offset
:
16835 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
16836 info_ptr
+= bytes_read
;
16838 case DW_FORM_string
:
16839 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
16840 DW_STRING_IS_CANONICAL (attr
) = 0;
16841 info_ptr
+= bytes_read
;
16844 if (!cu
->per_cu
->is_dwz
)
16846 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
16848 DW_STRING_IS_CANONICAL (attr
) = 0;
16849 info_ptr
+= bytes_read
;
16853 case DW_FORM_line_strp
:
16854 if (!cu
->per_cu
->is_dwz
)
16856 DW_STRING (attr
) = read_indirect_line_string (abfd
, info_ptr
,
16857 cu_header
, &bytes_read
);
16858 DW_STRING_IS_CANONICAL (attr
) = 0;
16859 info_ptr
+= bytes_read
;
16863 case DW_FORM_GNU_strp_alt
:
16865 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
16866 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
16869 DW_STRING (attr
) = read_indirect_string_from_dwz (dwz
, str_offset
);
16870 DW_STRING_IS_CANONICAL (attr
) = 0;
16871 info_ptr
+= bytes_read
;
16874 case DW_FORM_exprloc
:
16875 case DW_FORM_block
:
16876 blk
= dwarf_alloc_block (cu
);
16877 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16878 info_ptr
+= bytes_read
;
16879 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16880 info_ptr
+= blk
->size
;
16881 DW_BLOCK (attr
) = blk
;
16883 case DW_FORM_block1
:
16884 blk
= dwarf_alloc_block (cu
);
16885 blk
->size
= read_1_byte (abfd
, info_ptr
);
16887 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16888 info_ptr
+= blk
->size
;
16889 DW_BLOCK (attr
) = blk
;
16891 case DW_FORM_data1
:
16892 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16896 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16899 case DW_FORM_flag_present
:
16900 DW_UNSND (attr
) = 1;
16902 case DW_FORM_sdata
:
16903 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
16904 info_ptr
+= bytes_read
;
16906 case DW_FORM_udata
:
16907 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16908 info_ptr
+= bytes_read
;
16911 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
16912 + read_1_byte (abfd
, info_ptr
));
16916 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
16917 + read_2_bytes (abfd
, info_ptr
));
16921 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
16922 + read_4_bytes (abfd
, info_ptr
));
16926 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
16927 + read_8_bytes (abfd
, info_ptr
));
16930 case DW_FORM_ref_sig8
:
16931 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
16934 case DW_FORM_ref_udata
:
16935 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
16936 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
16937 info_ptr
+= bytes_read
;
16939 case DW_FORM_indirect
:
16940 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16941 info_ptr
+= bytes_read
;
16942 if (form
== DW_FORM_implicit_const
)
16944 implicit_const
= read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
16945 info_ptr
+= bytes_read
;
16947 info_ptr
= read_attribute_value (reader
, attr
, form
, implicit_const
,
16950 case DW_FORM_implicit_const
:
16951 DW_SND (attr
) = implicit_const
;
16953 case DW_FORM_GNU_addr_index
:
16954 if (reader
->dwo_file
== NULL
)
16956 /* For now flag a hard error.
16957 Later we can turn this into a complaint. */
16958 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16959 dwarf_form_name (form
),
16960 bfd_get_filename (abfd
));
16962 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
16963 info_ptr
+= bytes_read
;
16965 case DW_FORM_GNU_str_index
:
16966 if (reader
->dwo_file
== NULL
)
16968 /* For now flag a hard error.
16969 Later we can turn this into a complaint if warranted. */
16970 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16971 dwarf_form_name (form
),
16972 bfd_get_filename (abfd
));
16975 ULONGEST str_index
=
16976 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16978 DW_STRING (attr
) = read_str_index (reader
, str_index
);
16979 DW_STRING_IS_CANONICAL (attr
) = 0;
16980 info_ptr
+= bytes_read
;
16984 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
16985 dwarf_form_name (form
),
16986 bfd_get_filename (abfd
));
16990 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
16991 attr
->form
= DW_FORM_GNU_ref_alt
;
16993 /* We have seen instances where the compiler tried to emit a byte
16994 size attribute of -1 which ended up being encoded as an unsigned
16995 0xffffffff. Although 0xffffffff is technically a valid size value,
16996 an object of this size seems pretty unlikely so we can relatively
16997 safely treat these cases as if the size attribute was invalid and
16998 treat them as zero by default. */
16999 if (attr
->name
== DW_AT_byte_size
17000 && form
== DW_FORM_data4
17001 && DW_UNSND (attr
) >= 0xffffffff)
17004 (&symfile_complaints
,
17005 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
17006 hex_string (DW_UNSND (attr
)));
17007 DW_UNSND (attr
) = 0;
17013 /* Read an attribute described by an abbreviated attribute. */
17015 static const gdb_byte
*
17016 read_attribute (const struct die_reader_specs
*reader
,
17017 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
17018 const gdb_byte
*info_ptr
)
17020 attr
->name
= abbrev
->name
;
17021 return read_attribute_value (reader
, attr
, abbrev
->form
,
17022 abbrev
->implicit_const
, info_ptr
);
17025 /* Read dwarf information from a buffer. */
17027 static unsigned int
17028 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
17030 return bfd_get_8 (abfd
, buf
);
17034 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
17036 return bfd_get_signed_8 (abfd
, buf
);
17039 static unsigned int
17040 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
17042 return bfd_get_16 (abfd
, buf
);
17046 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
17048 return bfd_get_signed_16 (abfd
, buf
);
17051 static unsigned int
17052 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
17054 return bfd_get_32 (abfd
, buf
);
17058 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
17060 return bfd_get_signed_32 (abfd
, buf
);
17064 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
17066 return bfd_get_64 (abfd
, buf
);
17070 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
17071 unsigned int *bytes_read
)
17073 struct comp_unit_head
*cu_header
= &cu
->header
;
17074 CORE_ADDR retval
= 0;
17076 if (cu_header
->signed_addr_p
)
17078 switch (cu_header
->addr_size
)
17081 retval
= bfd_get_signed_16 (abfd
, buf
);
17084 retval
= bfd_get_signed_32 (abfd
, buf
);
17087 retval
= bfd_get_signed_64 (abfd
, buf
);
17090 internal_error (__FILE__
, __LINE__
,
17091 _("read_address: bad switch, signed [in module %s]"),
17092 bfd_get_filename (abfd
));
17097 switch (cu_header
->addr_size
)
17100 retval
= bfd_get_16 (abfd
, buf
);
17103 retval
= bfd_get_32 (abfd
, buf
);
17106 retval
= bfd_get_64 (abfd
, buf
);
17109 internal_error (__FILE__
, __LINE__
,
17110 _("read_address: bad switch, "
17111 "unsigned [in module %s]"),
17112 bfd_get_filename (abfd
));
17116 *bytes_read
= cu_header
->addr_size
;
17120 /* Read the initial length from a section. The (draft) DWARF 3
17121 specification allows the initial length to take up either 4 bytes
17122 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
17123 bytes describe the length and all offsets will be 8 bytes in length
17126 An older, non-standard 64-bit format is also handled by this
17127 function. The older format in question stores the initial length
17128 as an 8-byte quantity without an escape value. Lengths greater
17129 than 2^32 aren't very common which means that the initial 4 bytes
17130 is almost always zero. Since a length value of zero doesn't make
17131 sense for the 32-bit format, this initial zero can be considered to
17132 be an escape value which indicates the presence of the older 64-bit
17133 format. As written, the code can't detect (old format) lengths
17134 greater than 4GB. If it becomes necessary to handle lengths
17135 somewhat larger than 4GB, we could allow other small values (such
17136 as the non-sensical values of 1, 2, and 3) to also be used as
17137 escape values indicating the presence of the old format.
17139 The value returned via bytes_read should be used to increment the
17140 relevant pointer after calling read_initial_length().
17142 [ Note: read_initial_length() and read_offset() are based on the
17143 document entitled "DWARF Debugging Information Format", revision
17144 3, draft 8, dated November 19, 2001. This document was obtained
17147 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
17149 This document is only a draft and is subject to change. (So beware.)
17151 Details regarding the older, non-standard 64-bit format were
17152 determined empirically by examining 64-bit ELF files produced by
17153 the SGI toolchain on an IRIX 6.5 machine.
17155 - Kevin, July 16, 2002
17159 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
17161 LONGEST length
= bfd_get_32 (abfd
, buf
);
17163 if (length
== 0xffffffff)
17165 length
= bfd_get_64 (abfd
, buf
+ 4);
17168 else if (length
== 0)
17170 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
17171 length
= bfd_get_64 (abfd
, buf
);
17182 /* Cover function for read_initial_length.
17183 Returns the length of the object at BUF, and stores the size of the
17184 initial length in *BYTES_READ and stores the size that offsets will be in
17186 If the initial length size is not equivalent to that specified in
17187 CU_HEADER then issue a complaint.
17188 This is useful when reading non-comp-unit headers. */
17191 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
17192 const struct comp_unit_head
*cu_header
,
17193 unsigned int *bytes_read
,
17194 unsigned int *offset_size
)
17196 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
17198 gdb_assert (cu_header
->initial_length_size
== 4
17199 || cu_header
->initial_length_size
== 8
17200 || cu_header
->initial_length_size
== 12);
17202 if (cu_header
->initial_length_size
!= *bytes_read
)
17203 complaint (&symfile_complaints
,
17204 _("intermixed 32-bit and 64-bit DWARF sections"));
17206 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
17210 /* Read an offset from the data stream. The size of the offset is
17211 given by cu_header->offset_size. */
17214 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
17215 const struct comp_unit_head
*cu_header
,
17216 unsigned int *bytes_read
)
17218 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
17220 *bytes_read
= cu_header
->offset_size
;
17224 /* Read an offset from the data stream. */
17227 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
17229 LONGEST retval
= 0;
17231 switch (offset_size
)
17234 retval
= bfd_get_32 (abfd
, buf
);
17237 retval
= bfd_get_64 (abfd
, buf
);
17240 internal_error (__FILE__
, __LINE__
,
17241 _("read_offset_1: bad switch [in module %s]"),
17242 bfd_get_filename (abfd
));
17248 static const gdb_byte
*
17249 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
17251 /* If the size of a host char is 8 bits, we can return a pointer
17252 to the buffer, otherwise we have to copy the data to a buffer
17253 allocated on the temporary obstack. */
17254 gdb_assert (HOST_CHAR_BIT
== 8);
17258 static const char *
17259 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
17260 unsigned int *bytes_read_ptr
)
17262 /* If the size of a host char is 8 bits, we can return a pointer
17263 to the string, otherwise we have to copy the string to a buffer
17264 allocated on the temporary obstack. */
17265 gdb_assert (HOST_CHAR_BIT
== 8);
17268 *bytes_read_ptr
= 1;
17271 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
17272 return (const char *) buf
;
17275 /* Return pointer to string at section SECT offset STR_OFFSET with error
17276 reporting strings FORM_NAME and SECT_NAME. */
17278 static const char *
17279 read_indirect_string_at_offset_from (bfd
*abfd
, LONGEST str_offset
,
17280 struct dwarf2_section_info
*sect
,
17281 const char *form_name
,
17282 const char *sect_name
)
17284 dwarf2_read_section (dwarf2_per_objfile
->objfile
, sect
);
17285 if (sect
->buffer
== NULL
)
17286 error (_("%s used without %s section [in module %s]"),
17287 form_name
, sect_name
, bfd_get_filename (abfd
));
17288 if (str_offset
>= sect
->size
)
17289 error (_("%s pointing outside of %s section [in module %s]"),
17290 form_name
, sect_name
, bfd_get_filename (abfd
));
17291 gdb_assert (HOST_CHAR_BIT
== 8);
17292 if (sect
->buffer
[str_offset
] == '\0')
17294 return (const char *) (sect
->buffer
+ str_offset
);
17297 /* Return pointer to string at .debug_str offset STR_OFFSET. */
17299 static const char *
17300 read_indirect_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
17302 return read_indirect_string_at_offset_from (abfd
, str_offset
,
17303 &dwarf2_per_objfile
->str
,
17304 "DW_FORM_strp", ".debug_str");
17307 /* Return pointer to string at .debug_line_str offset STR_OFFSET. */
17309 static const char *
17310 read_indirect_line_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
17312 return read_indirect_string_at_offset_from (abfd
, str_offset
,
17313 &dwarf2_per_objfile
->line_str
,
17314 "DW_FORM_line_strp",
17315 ".debug_line_str");
17318 /* Read a string at offset STR_OFFSET in the .debug_str section from
17319 the .dwz file DWZ. Throw an error if the offset is too large. If
17320 the string consists of a single NUL byte, return NULL; otherwise
17321 return a pointer to the string. */
17323 static const char *
17324 read_indirect_string_from_dwz (struct dwz_file
*dwz
, LONGEST str_offset
)
17326 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwz
->str
);
17328 if (dwz
->str
.buffer
== NULL
)
17329 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
17330 "section [in module %s]"),
17331 bfd_get_filename (dwz
->dwz_bfd
));
17332 if (str_offset
>= dwz
->str
.size
)
17333 error (_("DW_FORM_GNU_strp_alt pointing outside of "
17334 ".debug_str section [in module %s]"),
17335 bfd_get_filename (dwz
->dwz_bfd
));
17336 gdb_assert (HOST_CHAR_BIT
== 8);
17337 if (dwz
->str
.buffer
[str_offset
] == '\0')
17339 return (const char *) (dwz
->str
.buffer
+ str_offset
);
17342 /* Return pointer to string at .debug_str offset as read from BUF.
17343 BUF is assumed to be in a compilation unit described by CU_HEADER.
17344 Return *BYTES_READ_PTR count of bytes read from BUF. */
17346 static const char *
17347 read_indirect_string (bfd
*abfd
, const gdb_byte
*buf
,
17348 const struct comp_unit_head
*cu_header
,
17349 unsigned int *bytes_read_ptr
)
17351 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
17353 return read_indirect_string_at_offset (abfd
, str_offset
);
17356 /* Return pointer to string at .debug_line_str offset as read from BUF.
17357 BUF is assumed to be in a compilation unit described by CU_HEADER.
17358 Return *BYTES_READ_PTR count of bytes read from BUF. */
17360 static const char *
17361 read_indirect_line_string (bfd
*abfd
, const gdb_byte
*buf
,
17362 const struct comp_unit_head
*cu_header
,
17363 unsigned int *bytes_read_ptr
)
17365 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
17367 return read_indirect_line_string_at_offset (abfd
, str_offset
);
17371 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
17372 unsigned int *bytes_read_ptr
)
17375 unsigned int num_read
;
17377 unsigned char byte
;
17384 byte
= bfd_get_8 (abfd
, buf
);
17387 result
|= ((ULONGEST
) (byte
& 127) << shift
);
17388 if ((byte
& 128) == 0)
17394 *bytes_read_ptr
= num_read
;
17399 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
17400 unsigned int *bytes_read_ptr
)
17403 int shift
, num_read
;
17404 unsigned char byte
;
17411 byte
= bfd_get_8 (abfd
, buf
);
17414 result
|= ((LONGEST
) (byte
& 127) << shift
);
17416 if ((byte
& 128) == 0)
17421 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
17422 result
|= -(((LONGEST
) 1) << shift
);
17423 *bytes_read_ptr
= num_read
;
17427 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
17428 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
17429 ADDR_SIZE is the size of addresses from the CU header. */
17432 read_addr_index_1 (unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
17434 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
17435 bfd
*abfd
= objfile
->obfd
;
17436 const gdb_byte
*info_ptr
;
17438 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
17439 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
17440 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
17441 objfile_name (objfile
));
17442 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
17443 error (_("DW_FORM_addr_index pointing outside of "
17444 ".debug_addr section [in module %s]"),
17445 objfile_name (objfile
));
17446 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
17447 + addr_base
+ addr_index
* addr_size
);
17448 if (addr_size
== 4)
17449 return bfd_get_32 (abfd
, info_ptr
);
17451 return bfd_get_64 (abfd
, info_ptr
);
17454 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
17457 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
17459 return read_addr_index_1 (addr_index
, cu
->addr_base
, cu
->header
.addr_size
);
17462 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
17465 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
17466 unsigned int *bytes_read
)
17468 bfd
*abfd
= cu
->objfile
->obfd
;
17469 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
17471 return read_addr_index (cu
, addr_index
);
17474 /* Data structure to pass results from dwarf2_read_addr_index_reader
17475 back to dwarf2_read_addr_index. */
17477 struct dwarf2_read_addr_index_data
17479 ULONGEST addr_base
;
17483 /* die_reader_func for dwarf2_read_addr_index. */
17486 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
17487 const gdb_byte
*info_ptr
,
17488 struct die_info
*comp_unit_die
,
17492 struct dwarf2_cu
*cu
= reader
->cu
;
17493 struct dwarf2_read_addr_index_data
*aidata
=
17494 (struct dwarf2_read_addr_index_data
*) data
;
17496 aidata
->addr_base
= cu
->addr_base
;
17497 aidata
->addr_size
= cu
->header
.addr_size
;
17500 /* Given an index in .debug_addr, fetch the value.
17501 NOTE: This can be called during dwarf expression evaluation,
17502 long after the debug information has been read, and thus per_cu->cu
17503 may no longer exist. */
17506 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
17507 unsigned int addr_index
)
17509 struct objfile
*objfile
= per_cu
->objfile
;
17510 struct dwarf2_cu
*cu
= per_cu
->cu
;
17511 ULONGEST addr_base
;
17514 /* This is intended to be called from outside this file. */
17515 dw2_setup (objfile
);
17517 /* We need addr_base and addr_size.
17518 If we don't have PER_CU->cu, we have to get it.
17519 Nasty, but the alternative is storing the needed info in PER_CU,
17520 which at this point doesn't seem justified: it's not clear how frequently
17521 it would get used and it would increase the size of every PER_CU.
17522 Entry points like dwarf2_per_cu_addr_size do a similar thing
17523 so we're not in uncharted territory here.
17524 Alas we need to be a bit more complicated as addr_base is contained
17527 We don't need to read the entire CU(/TU).
17528 We just need the header and top level die.
17530 IWBN to use the aging mechanism to let us lazily later discard the CU.
17531 For now we skip this optimization. */
17535 addr_base
= cu
->addr_base
;
17536 addr_size
= cu
->header
.addr_size
;
17540 struct dwarf2_read_addr_index_data aidata
;
17542 /* Note: We can't use init_cutu_and_read_dies_simple here,
17543 we need addr_base. */
17544 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
17545 dwarf2_read_addr_index_reader
, &aidata
);
17546 addr_base
= aidata
.addr_base
;
17547 addr_size
= aidata
.addr_size
;
17550 return read_addr_index_1 (addr_index
, addr_base
, addr_size
);
17553 /* Given a DW_FORM_GNU_str_index, fetch the string.
17554 This is only used by the Fission support. */
17556 static const char *
17557 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
17559 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
17560 const char *objf_name
= objfile_name (objfile
);
17561 bfd
*abfd
= objfile
->obfd
;
17562 struct dwarf2_cu
*cu
= reader
->cu
;
17563 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
17564 struct dwarf2_section_info
*str_offsets_section
=
17565 &reader
->dwo_file
->sections
.str_offsets
;
17566 const gdb_byte
*info_ptr
;
17567 ULONGEST str_offset
;
17568 static const char form_name
[] = "DW_FORM_GNU_str_index";
17570 dwarf2_read_section (objfile
, str_section
);
17571 dwarf2_read_section (objfile
, str_offsets_section
);
17572 if (str_section
->buffer
== NULL
)
17573 error (_("%s used without .debug_str.dwo section"
17574 " in CU at offset 0x%x [in module %s]"),
17575 form_name
, to_underlying (cu
->header
.sect_off
), objf_name
);
17576 if (str_offsets_section
->buffer
== NULL
)
17577 error (_("%s used without .debug_str_offsets.dwo section"
17578 " in CU at offset 0x%x [in module %s]"),
17579 form_name
, to_underlying (cu
->header
.sect_off
), objf_name
);
17580 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
17581 error (_("%s pointing outside of .debug_str_offsets.dwo"
17582 " section in CU at offset 0x%x [in module %s]"),
17583 form_name
, to_underlying (cu
->header
.sect_off
), objf_name
);
17584 info_ptr
= (str_offsets_section
->buffer
17585 + str_index
* cu
->header
.offset_size
);
17586 if (cu
->header
.offset_size
== 4)
17587 str_offset
= bfd_get_32 (abfd
, info_ptr
);
17589 str_offset
= bfd_get_64 (abfd
, info_ptr
);
17590 if (str_offset
>= str_section
->size
)
17591 error (_("Offset from %s pointing outside of"
17592 " .debug_str.dwo section in CU at offset 0x%x [in module %s]"),
17593 form_name
, to_underlying (cu
->header
.sect_off
), objf_name
);
17594 return (const char *) (str_section
->buffer
+ str_offset
);
17597 /* Return the length of an LEB128 number in BUF. */
17600 leb128_size (const gdb_byte
*buf
)
17602 const gdb_byte
*begin
= buf
;
17608 if ((byte
& 128) == 0)
17609 return buf
- begin
;
17614 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
17623 cu
->language
= language_c
;
17626 case DW_LANG_C_plus_plus
:
17627 case DW_LANG_C_plus_plus_11
:
17628 case DW_LANG_C_plus_plus_14
:
17629 cu
->language
= language_cplus
;
17632 cu
->language
= language_d
;
17634 case DW_LANG_Fortran77
:
17635 case DW_LANG_Fortran90
:
17636 case DW_LANG_Fortran95
:
17637 case DW_LANG_Fortran03
:
17638 case DW_LANG_Fortran08
:
17639 cu
->language
= language_fortran
;
17642 cu
->language
= language_go
;
17644 case DW_LANG_Mips_Assembler
:
17645 cu
->language
= language_asm
;
17647 case DW_LANG_Ada83
:
17648 case DW_LANG_Ada95
:
17649 cu
->language
= language_ada
;
17651 case DW_LANG_Modula2
:
17652 cu
->language
= language_m2
;
17654 case DW_LANG_Pascal83
:
17655 cu
->language
= language_pascal
;
17658 cu
->language
= language_objc
;
17661 case DW_LANG_Rust_old
:
17662 cu
->language
= language_rust
;
17664 case DW_LANG_Cobol74
:
17665 case DW_LANG_Cobol85
:
17667 cu
->language
= language_minimal
;
17670 cu
->language_defn
= language_def (cu
->language
);
17673 /* Return the named attribute or NULL if not there. */
17675 static struct attribute
*
17676 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
17681 struct attribute
*spec
= NULL
;
17683 for (i
= 0; i
< die
->num_attrs
; ++i
)
17685 if (die
->attrs
[i
].name
== name
)
17686 return &die
->attrs
[i
];
17687 if (die
->attrs
[i
].name
== DW_AT_specification
17688 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
17689 spec
= &die
->attrs
[i
];
17695 die
= follow_die_ref (die
, spec
, &cu
);
17701 /* Return the named attribute or NULL if not there,
17702 but do not follow DW_AT_specification, etc.
17703 This is for use in contexts where we're reading .debug_types dies.
17704 Following DW_AT_specification, DW_AT_abstract_origin will take us
17705 back up the chain, and we want to go down. */
17707 static struct attribute
*
17708 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
17712 for (i
= 0; i
< die
->num_attrs
; ++i
)
17713 if (die
->attrs
[i
].name
== name
)
17714 return &die
->attrs
[i
];
17719 /* Return the string associated with a string-typed attribute, or NULL if it
17720 is either not found or is of an incorrect type. */
17722 static const char *
17723 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
17725 struct attribute
*attr
;
17726 const char *str
= NULL
;
17728 attr
= dwarf2_attr (die
, name
, cu
);
17732 if (attr
->form
== DW_FORM_strp
|| attr
->form
== DW_FORM_line_strp
17733 || attr
->form
== DW_FORM_string
17734 || attr
->form
== DW_FORM_GNU_str_index
17735 || attr
->form
== DW_FORM_GNU_strp_alt
)
17736 str
= DW_STRING (attr
);
17738 complaint (&symfile_complaints
,
17739 _("string type expected for attribute %s for "
17740 "DIE at 0x%x in module %s"),
17741 dwarf_attr_name (name
), to_underlying (die
->sect_off
),
17742 objfile_name (cu
->objfile
));
17748 /* Return non-zero iff the attribute NAME is defined for the given DIE,
17749 and holds a non-zero value. This function should only be used for
17750 DW_FORM_flag or DW_FORM_flag_present attributes. */
17753 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
17755 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
17757 return (attr
&& DW_UNSND (attr
));
17761 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
17763 /* A DIE is a declaration if it has a DW_AT_declaration attribute
17764 which value is non-zero. However, we have to be careful with
17765 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
17766 (via dwarf2_flag_true_p) follows this attribute. So we may
17767 end up accidently finding a declaration attribute that belongs
17768 to a different DIE referenced by the specification attribute,
17769 even though the given DIE does not have a declaration attribute. */
17770 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
17771 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
17774 /* Return the die giving the specification for DIE, if there is
17775 one. *SPEC_CU is the CU containing DIE on input, and the CU
17776 containing the return value on output. If there is no
17777 specification, but there is an abstract origin, that is
17780 static struct die_info
*
17781 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
17783 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
17786 if (spec_attr
== NULL
)
17787 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
17789 if (spec_attr
== NULL
)
17792 return follow_die_ref (die
, spec_attr
, spec_cu
);
17795 /* Stub for free_line_header to match void * callback types. */
17798 free_line_header_voidp (void *arg
)
17800 struct line_header
*lh
= (struct line_header
*) arg
;
17806 line_header::add_include_dir (const char *include_dir
)
17808 if (dwarf_line_debug
>= 2)
17809 fprintf_unfiltered (gdb_stdlog
, "Adding dir %zu: %s\n",
17810 include_dirs
.size () + 1, include_dir
);
17812 include_dirs
.push_back (include_dir
);
17816 line_header::add_file_name (const char *name
,
17818 unsigned int mod_time
,
17819 unsigned int length
)
17821 if (dwarf_line_debug
>= 2)
17822 fprintf_unfiltered (gdb_stdlog
, "Adding file %u: %s\n",
17823 (unsigned) file_names
.size () + 1, name
);
17825 file_names
.emplace_back (name
, d_index
, mod_time
, length
);
17828 /* A convenience function to find the proper .debug_line section for a CU. */
17830 static struct dwarf2_section_info
*
17831 get_debug_line_section (struct dwarf2_cu
*cu
)
17833 struct dwarf2_section_info
*section
;
17835 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
17837 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
17838 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
17839 else if (cu
->per_cu
->is_dwz
)
17841 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
17843 section
= &dwz
->line
;
17846 section
= &dwarf2_per_objfile
->line
;
17851 /* Read directory or file name entry format, starting with byte of
17852 format count entries, ULEB128 pairs of entry formats, ULEB128 of
17853 entries count and the entries themselves in the described entry
17857 read_formatted_entries (bfd
*abfd
, const gdb_byte
**bufp
,
17858 struct line_header
*lh
,
17859 const struct comp_unit_head
*cu_header
,
17860 void (*callback
) (struct line_header
*lh
,
17863 unsigned int mod_time
,
17864 unsigned int length
))
17866 gdb_byte format_count
, formati
;
17867 ULONGEST data_count
, datai
;
17868 const gdb_byte
*buf
= *bufp
;
17869 const gdb_byte
*format_header_data
;
17871 unsigned int bytes_read
;
17873 format_count
= read_1_byte (abfd
, buf
);
17875 format_header_data
= buf
;
17876 for (formati
= 0; formati
< format_count
; formati
++)
17878 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
17880 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
17884 data_count
= read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
17886 for (datai
= 0; datai
< data_count
; datai
++)
17888 const gdb_byte
*format
= format_header_data
;
17889 struct file_entry fe
;
17891 for (formati
= 0; formati
< format_count
; formati
++)
17893 ULONGEST content_type
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
17894 format
+= bytes_read
;
17896 ULONGEST form
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
17897 format
+= bytes_read
;
17899 gdb::optional
<const char *> string
;
17900 gdb::optional
<unsigned int> uint
;
17904 case DW_FORM_string
:
17905 string
.emplace (read_direct_string (abfd
, buf
, &bytes_read
));
17909 case DW_FORM_line_strp
:
17910 string
.emplace (read_indirect_line_string (abfd
, buf
,
17916 case DW_FORM_data1
:
17917 uint
.emplace (read_1_byte (abfd
, buf
));
17921 case DW_FORM_data2
:
17922 uint
.emplace (read_2_bytes (abfd
, buf
));
17926 case DW_FORM_data4
:
17927 uint
.emplace (read_4_bytes (abfd
, buf
));
17931 case DW_FORM_data8
:
17932 uint
.emplace (read_8_bytes (abfd
, buf
));
17936 case DW_FORM_udata
:
17937 uint
.emplace (read_unsigned_leb128 (abfd
, buf
, &bytes_read
));
17941 case DW_FORM_block
:
17942 /* It is valid only for DW_LNCT_timestamp which is ignored by
17947 switch (content_type
)
17950 if (string
.has_value ())
17953 case DW_LNCT_directory_index
:
17954 if (uint
.has_value ())
17955 fe
.d_index
= (dir_index
) *uint
;
17957 case DW_LNCT_timestamp
:
17958 if (uint
.has_value ())
17959 fe
.mod_time
= *uint
;
17962 if (uint
.has_value ())
17968 complaint (&symfile_complaints
,
17969 _("Unknown format content type %s"),
17970 pulongest (content_type
));
17974 callback (lh
, fe
.name
, fe
.d_index
, fe
.mod_time
, fe
.length
);
17980 /* Read the statement program header starting at OFFSET in
17981 .debug_line, or .debug_line.dwo. Return a pointer
17982 to a struct line_header, allocated using xmalloc.
17983 Returns NULL if there is a problem reading the header, e.g., if it
17984 has a version we don't understand.
17986 NOTE: the strings in the include directory and file name tables of
17987 the returned object point into the dwarf line section buffer,
17988 and must not be freed. */
17990 static line_header_up
17991 dwarf_decode_line_header (sect_offset sect_off
, struct dwarf2_cu
*cu
)
17993 const gdb_byte
*line_ptr
;
17994 unsigned int bytes_read
, offset_size
;
17996 const char *cur_dir
, *cur_file
;
17997 struct dwarf2_section_info
*section
;
18000 section
= get_debug_line_section (cu
);
18001 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
18002 if (section
->buffer
== NULL
)
18004 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
18005 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
18007 complaint (&symfile_complaints
, _("missing .debug_line section"));
18011 /* We can't do this until we know the section is non-empty.
18012 Only then do we know we have such a section. */
18013 abfd
= get_section_bfd_owner (section
);
18015 /* Make sure that at least there's room for the total_length field.
18016 That could be 12 bytes long, but we're just going to fudge that. */
18017 if (to_underlying (sect_off
) + 4 >= section
->size
)
18019 dwarf2_statement_list_fits_in_line_number_section_complaint ();
18023 line_header_up
lh (new line_header ());
18025 lh
->sect_off
= sect_off
;
18026 lh
->offset_in_dwz
= cu
->per_cu
->is_dwz
;
18028 line_ptr
= section
->buffer
+ to_underlying (sect_off
);
18030 /* Read in the header. */
18032 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
18033 &bytes_read
, &offset_size
);
18034 line_ptr
+= bytes_read
;
18035 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
18037 dwarf2_statement_list_fits_in_line_number_section_complaint ();
18040 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
18041 lh
->version
= read_2_bytes (abfd
, line_ptr
);
18043 if (lh
->version
> 5)
18045 /* This is a version we don't understand. The format could have
18046 changed in ways we don't handle properly so just punt. */
18047 complaint (&symfile_complaints
,
18048 _("unsupported version in .debug_line section"));
18051 if (lh
->version
>= 5)
18053 gdb_byte segment_selector_size
;
18055 /* Skip address size. */
18056 read_1_byte (abfd
, line_ptr
);
18059 segment_selector_size
= read_1_byte (abfd
, line_ptr
);
18061 if (segment_selector_size
!= 0)
18063 complaint (&symfile_complaints
,
18064 _("unsupported segment selector size %u "
18065 "in .debug_line section"),
18066 segment_selector_size
);
18070 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
18071 line_ptr
+= offset_size
;
18072 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
18074 if (lh
->version
>= 4)
18076 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
18080 lh
->maximum_ops_per_instruction
= 1;
18082 if (lh
->maximum_ops_per_instruction
== 0)
18084 lh
->maximum_ops_per_instruction
= 1;
18085 complaint (&symfile_complaints
,
18086 _("invalid maximum_ops_per_instruction "
18087 "in `.debug_line' section"));
18090 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
18092 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
18094 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
18096 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
18098 lh
->standard_opcode_lengths
.reset (new unsigned char[lh
->opcode_base
]);
18100 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
18101 for (i
= 1; i
< lh
->opcode_base
; ++i
)
18103 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
18107 if (lh
->version
>= 5)
18109 /* Read directory table. */
18110 read_formatted_entries (abfd
, &line_ptr
, lh
.get (), &cu
->header
,
18111 [] (struct line_header
*lh
, const char *name
,
18112 dir_index d_index
, unsigned int mod_time
,
18113 unsigned int length
)
18115 lh
->add_include_dir (name
);
18118 /* Read file name table. */
18119 read_formatted_entries (abfd
, &line_ptr
, lh
.get (), &cu
->header
,
18120 [] (struct line_header
*lh
, const char *name
,
18121 dir_index d_index
, unsigned int mod_time
,
18122 unsigned int length
)
18124 lh
->add_file_name (name
, d_index
, mod_time
, length
);
18129 /* Read directory table. */
18130 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
18132 line_ptr
+= bytes_read
;
18133 lh
->add_include_dir (cur_dir
);
18135 line_ptr
+= bytes_read
;
18137 /* Read file name table. */
18138 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
18140 unsigned int mod_time
, length
;
18143 line_ptr
+= bytes_read
;
18144 d_index
= (dir_index
) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18145 line_ptr
+= bytes_read
;
18146 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18147 line_ptr
+= bytes_read
;
18148 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18149 line_ptr
+= bytes_read
;
18151 lh
->add_file_name (cur_file
, d_index
, mod_time
, length
);
18153 line_ptr
+= bytes_read
;
18155 lh
->statement_program_start
= line_ptr
;
18157 if (line_ptr
> (section
->buffer
+ section
->size
))
18158 complaint (&symfile_complaints
,
18159 _("line number info header doesn't "
18160 "fit in `.debug_line' section"));
18165 /* Subroutine of dwarf_decode_lines to simplify it.
18166 Return the file name of the psymtab for included file FILE_INDEX
18167 in line header LH of PST.
18168 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
18169 If space for the result is malloc'd, it will be freed by a cleanup.
18170 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename.
18172 The function creates dangling cleanup registration. */
18174 static const char *
18175 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
18176 const struct partial_symtab
*pst
,
18177 const char *comp_dir
)
18179 const file_entry
&fe
= lh
->file_names
[file_index
];
18180 const char *include_name
= fe
.name
;
18181 const char *include_name_to_compare
= include_name
;
18182 const char *pst_filename
;
18183 char *copied_name
= NULL
;
18186 const char *dir_name
= fe
.include_dir (lh
);
18188 if (!IS_ABSOLUTE_PATH (include_name
)
18189 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
18191 /* Avoid creating a duplicate psymtab for PST.
18192 We do this by comparing INCLUDE_NAME and PST_FILENAME.
18193 Before we do the comparison, however, we need to account
18194 for DIR_NAME and COMP_DIR.
18195 First prepend dir_name (if non-NULL). If we still don't
18196 have an absolute path prepend comp_dir (if non-NULL).
18197 However, the directory we record in the include-file's
18198 psymtab does not contain COMP_DIR (to match the
18199 corresponding symtab(s)).
18204 bash$ gcc -g ./hello.c
18205 include_name = "hello.c"
18207 DW_AT_comp_dir = comp_dir = "/tmp"
18208 DW_AT_name = "./hello.c"
18212 if (dir_name
!= NULL
)
18214 char *tem
= concat (dir_name
, SLASH_STRING
,
18215 include_name
, (char *)NULL
);
18217 make_cleanup (xfree
, tem
);
18218 include_name
= tem
;
18219 include_name_to_compare
= include_name
;
18221 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
18223 char *tem
= concat (comp_dir
, SLASH_STRING
,
18224 include_name
, (char *)NULL
);
18226 make_cleanup (xfree
, tem
);
18227 include_name_to_compare
= tem
;
18231 pst_filename
= pst
->filename
;
18232 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
18234 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
18235 pst_filename
, (char *)NULL
);
18236 pst_filename
= copied_name
;
18239 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
18241 if (copied_name
!= NULL
)
18242 xfree (copied_name
);
18246 return include_name
;
18249 /* State machine to track the state of the line number program. */
18251 class lnp_state_machine
18254 /* Initialize a machine state for the start of a line number
18256 lnp_state_machine (gdbarch
*arch
, line_header
*lh
, bool record_lines_p
);
18258 file_entry
*current_file ()
18260 /* lh->file_names is 0-based, but the file name numbers in the
18261 statement program are 1-based. */
18262 return m_line_header
->file_name_at (m_file
);
18265 /* Record the line in the state machine. END_SEQUENCE is true if
18266 we're processing the end of a sequence. */
18267 void record_line (bool end_sequence
);
18269 /* Check address and if invalid nop-out the rest of the lines in this
18271 void check_line_address (struct dwarf2_cu
*cu
,
18272 const gdb_byte
*line_ptr
,
18273 CORE_ADDR lowpc
, CORE_ADDR address
);
18275 void handle_set_discriminator (unsigned int discriminator
)
18277 m_discriminator
= discriminator
;
18278 m_line_has_non_zero_discriminator
|= discriminator
!= 0;
18281 /* Handle DW_LNE_set_address. */
18282 void handle_set_address (CORE_ADDR baseaddr
, CORE_ADDR address
)
18285 address
+= baseaddr
;
18286 m_address
= gdbarch_adjust_dwarf2_line (m_gdbarch
, address
, false);
18289 /* Handle DW_LNS_advance_pc. */
18290 void handle_advance_pc (CORE_ADDR adjust
);
18292 /* Handle a special opcode. */
18293 void handle_special_opcode (unsigned char op_code
);
18295 /* Handle DW_LNS_advance_line. */
18296 void handle_advance_line (int line_delta
)
18298 advance_line (line_delta
);
18301 /* Handle DW_LNS_set_file. */
18302 void handle_set_file (file_name_index file
);
18304 /* Handle DW_LNS_negate_stmt. */
18305 void handle_negate_stmt ()
18307 m_is_stmt
= !m_is_stmt
;
18310 /* Handle DW_LNS_const_add_pc. */
18311 void handle_const_add_pc ();
18313 /* Handle DW_LNS_fixed_advance_pc. */
18314 void handle_fixed_advance_pc (CORE_ADDR addr_adj
)
18316 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
18320 /* Handle DW_LNS_copy. */
18321 void handle_copy ()
18323 record_line (false);
18324 m_discriminator
= 0;
18327 /* Handle DW_LNE_end_sequence. */
18328 void handle_end_sequence ()
18330 m_record_line_callback
= ::record_line
;
18334 /* Advance the line by LINE_DELTA. */
18335 void advance_line (int line_delta
)
18337 m_line
+= line_delta
;
18339 if (line_delta
!= 0)
18340 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
18343 gdbarch
*m_gdbarch
;
18345 /* True if we're recording lines.
18346 Otherwise we're building partial symtabs and are just interested in
18347 finding include files mentioned by the line number program. */
18348 bool m_record_lines_p
;
18350 /* The line number header. */
18351 line_header
*m_line_header
;
18353 /* These are part of the standard DWARF line number state machine,
18354 and initialized according to the DWARF spec. */
18356 unsigned char m_op_index
= 0;
18357 /* The line table index (1-based) of the current file. */
18358 file_name_index m_file
= (file_name_index
) 1;
18359 unsigned int m_line
= 1;
18361 /* These are initialized in the constructor. */
18363 CORE_ADDR m_address
;
18365 unsigned int m_discriminator
;
18367 /* Additional bits of state we need to track. */
18369 /* The last file that we called dwarf2_start_subfile for.
18370 This is only used for TLLs. */
18371 unsigned int m_last_file
= 0;
18372 /* The last file a line number was recorded for. */
18373 struct subfile
*m_last_subfile
= NULL
;
18375 /* The function to call to record a line. */
18376 record_line_ftype
*m_record_line_callback
= NULL
;
18378 /* The last line number that was recorded, used to coalesce
18379 consecutive entries for the same line. This can happen, for
18380 example, when discriminators are present. PR 17276. */
18381 unsigned int m_last_line
= 0;
18382 bool m_line_has_non_zero_discriminator
= false;
18386 lnp_state_machine::handle_advance_pc (CORE_ADDR adjust
)
18388 CORE_ADDR addr_adj
= (((m_op_index
+ adjust
)
18389 / m_line_header
->maximum_ops_per_instruction
)
18390 * m_line_header
->minimum_instruction_length
);
18391 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
18392 m_op_index
= ((m_op_index
+ adjust
)
18393 % m_line_header
->maximum_ops_per_instruction
);
18397 lnp_state_machine::handle_special_opcode (unsigned char op_code
)
18399 unsigned char adj_opcode
= op_code
- m_line_header
->opcode_base
;
18400 CORE_ADDR addr_adj
= (((m_op_index
18401 + (adj_opcode
/ m_line_header
->line_range
))
18402 / m_line_header
->maximum_ops_per_instruction
)
18403 * m_line_header
->minimum_instruction_length
);
18404 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
18405 m_op_index
= ((m_op_index
+ (adj_opcode
/ m_line_header
->line_range
))
18406 % m_line_header
->maximum_ops_per_instruction
);
18408 int line_delta
= (m_line_header
->line_base
18409 + (adj_opcode
% m_line_header
->line_range
));
18410 advance_line (line_delta
);
18411 record_line (false);
18412 m_discriminator
= 0;
18416 lnp_state_machine::handle_set_file (file_name_index file
)
18420 const file_entry
*fe
= current_file ();
18422 dwarf2_debug_line_missing_file_complaint ();
18423 else if (m_record_lines_p
)
18425 const char *dir
= fe
->include_dir (m_line_header
);
18427 m_last_subfile
= current_subfile
;
18428 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
18429 dwarf2_start_subfile (fe
->name
, dir
);
18434 lnp_state_machine::handle_const_add_pc ()
18437 = (255 - m_line_header
->opcode_base
) / m_line_header
->line_range
;
18440 = (((m_op_index
+ adjust
)
18441 / m_line_header
->maximum_ops_per_instruction
)
18442 * m_line_header
->minimum_instruction_length
);
18444 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
18445 m_op_index
= ((m_op_index
+ adjust
)
18446 % m_line_header
->maximum_ops_per_instruction
);
18449 /* Ignore this record_line request. */
18452 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
18457 /* Return non-zero if we should add LINE to the line number table.
18458 LINE is the line to add, LAST_LINE is the last line that was added,
18459 LAST_SUBFILE is the subfile for LAST_LINE.
18460 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
18461 had a non-zero discriminator.
18463 We have to be careful in the presence of discriminators.
18464 E.g., for this line:
18466 for (i = 0; i < 100000; i++);
18468 clang can emit four line number entries for that one line,
18469 each with a different discriminator.
18470 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
18472 However, we want gdb to coalesce all four entries into one.
18473 Otherwise the user could stepi into the middle of the line and
18474 gdb would get confused about whether the pc really was in the
18475 middle of the line.
18477 Things are further complicated by the fact that two consecutive
18478 line number entries for the same line is a heuristic used by gcc
18479 to denote the end of the prologue. So we can't just discard duplicate
18480 entries, we have to be selective about it. The heuristic we use is
18481 that we only collapse consecutive entries for the same line if at least
18482 one of those entries has a non-zero discriminator. PR 17276.
18484 Note: Addresses in the line number state machine can never go backwards
18485 within one sequence, thus this coalescing is ok. */
18488 dwarf_record_line_p (unsigned int line
, unsigned int last_line
,
18489 int line_has_non_zero_discriminator
,
18490 struct subfile
*last_subfile
)
18492 if (current_subfile
!= last_subfile
)
18494 if (line
!= last_line
)
18496 /* Same line for the same file that we've seen already.
18497 As a last check, for pr 17276, only record the line if the line
18498 has never had a non-zero discriminator. */
18499 if (!line_has_non_zero_discriminator
)
18504 /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS
18505 in the line table of subfile SUBFILE. */
18508 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
18509 unsigned int line
, CORE_ADDR address
,
18510 record_line_ftype p_record_line
)
18512 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
18514 if (dwarf_line_debug
)
18516 fprintf_unfiltered (gdb_stdlog
,
18517 "Recording line %u, file %s, address %s\n",
18518 line
, lbasename (subfile
->name
),
18519 paddress (gdbarch
, address
));
18522 (*p_record_line
) (subfile
, line
, addr
);
18525 /* Subroutine of dwarf_decode_lines_1 to simplify it.
18526 Mark the end of a set of line number records.
18527 The arguments are the same as for dwarf_record_line_1.
18528 If SUBFILE is NULL the request is ignored. */
18531 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
18532 CORE_ADDR address
, record_line_ftype p_record_line
)
18534 if (subfile
== NULL
)
18537 if (dwarf_line_debug
)
18539 fprintf_unfiltered (gdb_stdlog
,
18540 "Finishing current line, file %s, address %s\n",
18541 lbasename (subfile
->name
),
18542 paddress (gdbarch
, address
));
18545 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, p_record_line
);
18549 lnp_state_machine::record_line (bool end_sequence
)
18551 if (dwarf_line_debug
)
18553 fprintf_unfiltered (gdb_stdlog
,
18554 "Processing actual line %u: file %u,"
18555 " address %s, is_stmt %u, discrim %u\n",
18556 m_line
, to_underlying (m_file
),
18557 paddress (m_gdbarch
, m_address
),
18558 m_is_stmt
, m_discriminator
);
18561 file_entry
*fe
= current_file ();
18564 dwarf2_debug_line_missing_file_complaint ();
18565 /* For now we ignore lines not starting on an instruction boundary.
18566 But not when processing end_sequence for compatibility with the
18567 previous version of the code. */
18568 else if (m_op_index
== 0 || end_sequence
)
18570 fe
->included_p
= 1;
18571 if (m_record_lines_p
&& m_is_stmt
)
18573 if (m_last_subfile
!= current_subfile
|| end_sequence
)
18575 dwarf_finish_line (m_gdbarch
, m_last_subfile
,
18576 m_address
, m_record_line_callback
);
18581 if (dwarf_record_line_p (m_line
, m_last_line
,
18582 m_line_has_non_zero_discriminator
,
18585 dwarf_record_line_1 (m_gdbarch
, current_subfile
,
18587 m_record_line_callback
);
18589 m_last_subfile
= current_subfile
;
18590 m_last_line
= m_line
;
18596 lnp_state_machine::lnp_state_machine (gdbarch
*arch
, line_header
*lh
,
18597 bool record_lines_p
)
18600 m_record_lines_p
= record_lines_p
;
18601 m_line_header
= lh
;
18603 m_record_line_callback
= ::record_line
;
18605 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
18606 was a line entry for it so that the backend has a chance to adjust it
18607 and also record it in case it needs it. This is currently used by MIPS
18608 code, cf. `mips_adjust_dwarf2_line'. */
18609 m_address
= gdbarch_adjust_dwarf2_line (arch
, 0, 0);
18610 m_is_stmt
= lh
->default_is_stmt
;
18611 m_discriminator
= 0;
18615 lnp_state_machine::check_line_address (struct dwarf2_cu
*cu
,
18616 const gdb_byte
*line_ptr
,
18617 CORE_ADDR lowpc
, CORE_ADDR address
)
18619 /* If address < lowpc then it's not a usable value, it's outside the
18620 pc range of the CU. However, we restrict the test to only address
18621 values of zero to preserve GDB's previous behaviour which is to
18622 handle the specific case of a function being GC'd by the linker. */
18624 if (address
== 0 && address
< lowpc
)
18626 /* This line table is for a function which has been
18627 GCd by the linker. Ignore it. PR gdb/12528 */
18629 struct objfile
*objfile
= cu
->objfile
;
18630 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
18632 complaint (&symfile_complaints
,
18633 _(".debug_line address at offset 0x%lx is 0 [in module %s]"),
18634 line_offset
, objfile_name (objfile
));
18635 m_record_line_callback
= noop_record_line
;
18636 /* Note: record_line_callback is left as noop_record_line until
18637 we see DW_LNE_end_sequence. */
18641 /* Subroutine of dwarf_decode_lines to simplify it.
18642 Process the line number information in LH.
18643 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
18644 program in order to set included_p for every referenced header. */
18647 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
18648 const int decode_for_pst_p
, CORE_ADDR lowpc
)
18650 const gdb_byte
*line_ptr
, *extended_end
;
18651 const gdb_byte
*line_end
;
18652 unsigned int bytes_read
, extended_len
;
18653 unsigned char op_code
, extended_op
;
18654 CORE_ADDR baseaddr
;
18655 struct objfile
*objfile
= cu
->objfile
;
18656 bfd
*abfd
= objfile
->obfd
;
18657 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18658 /* True if we're recording line info (as opposed to building partial
18659 symtabs and just interested in finding include files mentioned by
18660 the line number program). */
18661 bool record_lines_p
= !decode_for_pst_p
;
18663 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
18665 line_ptr
= lh
->statement_program_start
;
18666 line_end
= lh
->statement_program_end
;
18668 /* Read the statement sequences until there's nothing left. */
18669 while (line_ptr
< line_end
)
18671 /* The DWARF line number program state machine. Reset the state
18672 machine at the start of each sequence. */
18673 lnp_state_machine
state_machine (gdbarch
, lh
, record_lines_p
);
18674 bool end_sequence
= false;
18676 if (record_lines_p
)
18678 /* Start a subfile for the current file of the state
18680 const file_entry
*fe
= state_machine
.current_file ();
18683 dwarf2_start_subfile (fe
->name
, fe
->include_dir (lh
));
18686 /* Decode the table. */
18687 while (line_ptr
< line_end
&& !end_sequence
)
18689 op_code
= read_1_byte (abfd
, line_ptr
);
18692 if (op_code
>= lh
->opcode_base
)
18694 /* Special opcode. */
18695 state_machine
.handle_special_opcode (op_code
);
18697 else switch (op_code
)
18699 case DW_LNS_extended_op
:
18700 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
18702 line_ptr
+= bytes_read
;
18703 extended_end
= line_ptr
+ extended_len
;
18704 extended_op
= read_1_byte (abfd
, line_ptr
);
18706 switch (extended_op
)
18708 case DW_LNE_end_sequence
:
18709 state_machine
.handle_end_sequence ();
18710 end_sequence
= true;
18712 case DW_LNE_set_address
:
18715 = read_address (abfd
, line_ptr
, cu
, &bytes_read
);
18716 line_ptr
+= bytes_read
;
18718 state_machine
.check_line_address (cu
, line_ptr
,
18720 state_machine
.handle_set_address (baseaddr
, address
);
18723 case DW_LNE_define_file
:
18725 const char *cur_file
;
18726 unsigned int mod_time
, length
;
18729 cur_file
= read_direct_string (abfd
, line_ptr
,
18731 line_ptr
+= bytes_read
;
18732 dindex
= (dir_index
)
18733 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18734 line_ptr
+= bytes_read
;
18736 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18737 line_ptr
+= bytes_read
;
18739 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18740 line_ptr
+= bytes_read
;
18741 lh
->add_file_name (cur_file
, dindex
, mod_time
, length
);
18744 case DW_LNE_set_discriminator
:
18746 /* The discriminator is not interesting to the
18747 debugger; just ignore it. We still need to
18748 check its value though:
18749 if there are consecutive entries for the same
18750 (non-prologue) line we want to coalesce them.
18753 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18754 line_ptr
+= bytes_read
;
18756 state_machine
.handle_set_discriminator (discr
);
18760 complaint (&symfile_complaints
,
18761 _("mangled .debug_line section"));
18764 /* Make sure that we parsed the extended op correctly. If e.g.
18765 we expected a different address size than the producer used,
18766 we may have read the wrong number of bytes. */
18767 if (line_ptr
!= extended_end
)
18769 complaint (&symfile_complaints
,
18770 _("mangled .debug_line section"));
18775 state_machine
.handle_copy ();
18777 case DW_LNS_advance_pc
:
18780 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18781 line_ptr
+= bytes_read
;
18783 state_machine
.handle_advance_pc (adjust
);
18786 case DW_LNS_advance_line
:
18789 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
18790 line_ptr
+= bytes_read
;
18792 state_machine
.handle_advance_line (line_delta
);
18795 case DW_LNS_set_file
:
18797 file_name_index file
18798 = (file_name_index
) read_unsigned_leb128 (abfd
, line_ptr
,
18800 line_ptr
+= bytes_read
;
18802 state_machine
.handle_set_file (file
);
18805 case DW_LNS_set_column
:
18806 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18807 line_ptr
+= bytes_read
;
18809 case DW_LNS_negate_stmt
:
18810 state_machine
.handle_negate_stmt ();
18812 case DW_LNS_set_basic_block
:
18814 /* Add to the address register of the state machine the
18815 address increment value corresponding to special opcode
18816 255. I.e., this value is scaled by the minimum
18817 instruction length since special opcode 255 would have
18818 scaled the increment. */
18819 case DW_LNS_const_add_pc
:
18820 state_machine
.handle_const_add_pc ();
18822 case DW_LNS_fixed_advance_pc
:
18824 CORE_ADDR addr_adj
= read_2_bytes (abfd
, line_ptr
);
18827 state_machine
.handle_fixed_advance_pc (addr_adj
);
18832 /* Unknown standard opcode, ignore it. */
18835 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
18837 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18838 line_ptr
+= bytes_read
;
18845 dwarf2_debug_line_missing_end_sequence_complaint ();
18847 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
18848 in which case we still finish recording the last line). */
18849 state_machine
.record_line (true);
18853 /* Decode the Line Number Program (LNP) for the given line_header
18854 structure and CU. The actual information extracted and the type
18855 of structures created from the LNP depends on the value of PST.
18857 1. If PST is NULL, then this procedure uses the data from the program
18858 to create all necessary symbol tables, and their linetables.
18860 2. If PST is not NULL, this procedure reads the program to determine
18861 the list of files included by the unit represented by PST, and
18862 builds all the associated partial symbol tables.
18864 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
18865 It is used for relative paths in the line table.
18866 NOTE: When processing partial symtabs (pst != NULL),
18867 comp_dir == pst->dirname.
18869 NOTE: It is important that psymtabs have the same file name (via strcmp)
18870 as the corresponding symtab. Since COMP_DIR is not used in the name of the
18871 symtab we don't use it in the name of the psymtabs we create.
18872 E.g. expand_line_sal requires this when finding psymtabs to expand.
18873 A good testcase for this is mb-inline.exp.
18875 LOWPC is the lowest address in CU (or 0 if not known).
18877 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
18878 for its PC<->lines mapping information. Otherwise only the filename
18879 table is read in. */
18882 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
18883 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
18884 CORE_ADDR lowpc
, int decode_mapping
)
18886 struct objfile
*objfile
= cu
->objfile
;
18887 const int decode_for_pst_p
= (pst
!= NULL
);
18889 if (decode_mapping
)
18890 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
18892 if (decode_for_pst_p
)
18896 /* Now that we're done scanning the Line Header Program, we can
18897 create the psymtab of each included file. */
18898 for (file_index
= 0; file_index
< lh
->file_names
.size (); file_index
++)
18899 if (lh
->file_names
[file_index
].included_p
== 1)
18901 const char *include_name
=
18902 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
18903 if (include_name
!= NULL
)
18904 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
18909 /* Make sure a symtab is created for every file, even files
18910 which contain only variables (i.e. no code with associated
18912 struct compunit_symtab
*cust
= buildsym_compunit_symtab ();
18915 for (i
= 0; i
< lh
->file_names
.size (); i
++)
18917 file_entry
&fe
= lh
->file_names
[i
];
18919 dwarf2_start_subfile (fe
.name
, fe
.include_dir (lh
));
18921 if (current_subfile
->symtab
== NULL
)
18923 current_subfile
->symtab
18924 = allocate_symtab (cust
, current_subfile
->name
);
18926 fe
.symtab
= current_subfile
->symtab
;
18931 /* Start a subfile for DWARF. FILENAME is the name of the file and
18932 DIRNAME the name of the source directory which contains FILENAME
18933 or NULL if not known.
18934 This routine tries to keep line numbers from identical absolute and
18935 relative file names in a common subfile.
18937 Using the `list' example from the GDB testsuite, which resides in
18938 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
18939 of /srcdir/list0.c yields the following debugging information for list0.c:
18941 DW_AT_name: /srcdir/list0.c
18942 DW_AT_comp_dir: /compdir
18943 files.files[0].name: list0.h
18944 files.files[0].dir: /srcdir
18945 files.files[1].name: list0.c
18946 files.files[1].dir: /srcdir
18948 The line number information for list0.c has to end up in a single
18949 subfile, so that `break /srcdir/list0.c:1' works as expected.
18950 start_subfile will ensure that this happens provided that we pass the
18951 concatenation of files.files[1].dir and files.files[1].name as the
18955 dwarf2_start_subfile (const char *filename
, const char *dirname
)
18959 /* In order not to lose the line information directory,
18960 we concatenate it to the filename when it makes sense.
18961 Note that the Dwarf3 standard says (speaking of filenames in line
18962 information): ``The directory index is ignored for file names
18963 that represent full path names''. Thus ignoring dirname in the
18964 `else' branch below isn't an issue. */
18966 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
18968 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
18972 start_subfile (filename
);
18978 /* Start a symtab for DWARF.
18979 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
18981 static struct compunit_symtab
*
18982 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
18983 const char *name
, const char *comp_dir
, CORE_ADDR low_pc
)
18985 struct compunit_symtab
*cust
18986 = start_symtab (cu
->objfile
, name
, comp_dir
, low_pc
);
18988 record_debugformat ("DWARF 2");
18989 record_producer (cu
->producer
);
18991 /* We assume that we're processing GCC output. */
18992 processing_gcc_compilation
= 2;
18994 cu
->processing_has_namespace_info
= 0;
19000 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
19001 struct dwarf2_cu
*cu
)
19003 struct objfile
*objfile
= cu
->objfile
;
19004 struct comp_unit_head
*cu_header
= &cu
->header
;
19006 /* NOTE drow/2003-01-30: There used to be a comment and some special
19007 code here to turn a symbol with DW_AT_external and a
19008 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
19009 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
19010 with some versions of binutils) where shared libraries could have
19011 relocations against symbols in their debug information - the
19012 minimal symbol would have the right address, but the debug info
19013 would not. It's no longer necessary, because we will explicitly
19014 apply relocations when we read in the debug information now. */
19016 /* A DW_AT_location attribute with no contents indicates that a
19017 variable has been optimized away. */
19018 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
19020 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
19024 /* Handle one degenerate form of location expression specially, to
19025 preserve GDB's previous behavior when section offsets are
19026 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
19027 then mark this symbol as LOC_STATIC. */
19029 if (attr_form_is_block (attr
)
19030 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
19031 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
19032 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
19033 && (DW_BLOCK (attr
)->size
19034 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
19036 unsigned int dummy
;
19038 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
19039 SYMBOL_VALUE_ADDRESS (sym
) =
19040 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
19042 SYMBOL_VALUE_ADDRESS (sym
) =
19043 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
19044 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
19045 fixup_symbol_section (sym
, objfile
);
19046 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
19047 SYMBOL_SECTION (sym
));
19051 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
19052 expression evaluator, and use LOC_COMPUTED only when necessary
19053 (i.e. when the value of a register or memory location is
19054 referenced, or a thread-local block, etc.). Then again, it might
19055 not be worthwhile. I'm assuming that it isn't unless performance
19056 or memory numbers show me otherwise. */
19058 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
19060 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
19061 cu
->has_loclist
= 1;
19064 /* Given a pointer to a DWARF information entry, figure out if we need
19065 to make a symbol table entry for it, and if so, create a new entry
19066 and return a pointer to it.
19067 If TYPE is NULL, determine symbol type from the die, otherwise
19068 used the passed type.
19069 If SPACE is not NULL, use it to hold the new symbol. If it is
19070 NULL, allocate a new symbol on the objfile's obstack. */
19072 static struct symbol
*
19073 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
19074 struct symbol
*space
)
19076 struct objfile
*objfile
= cu
->objfile
;
19077 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
19078 struct symbol
*sym
= NULL
;
19080 struct attribute
*attr
= NULL
;
19081 struct attribute
*attr2
= NULL
;
19082 CORE_ADDR baseaddr
;
19083 struct pending
**list_to_add
= NULL
;
19085 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
19087 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
19089 name
= dwarf2_name (die
, cu
);
19092 const char *linkagename
;
19093 int suppress_add
= 0;
19098 sym
= allocate_symbol (objfile
);
19099 OBJSTAT (objfile
, n_syms
++);
19101 /* Cache this symbol's name and the name's demangled form (if any). */
19102 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
19103 linkagename
= dwarf2_physname (name
, die
, cu
);
19104 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
19106 /* Fortran does not have mangling standard and the mangling does differ
19107 between gfortran, iFort etc. */
19108 if (cu
->language
== language_fortran
19109 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
19110 symbol_set_demangled_name (&(sym
->ginfo
),
19111 dwarf2_full_name (name
, die
, cu
),
19114 /* Default assumptions.
19115 Use the passed type or decode it from the die. */
19116 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
19117 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
19119 SYMBOL_TYPE (sym
) = type
;
19121 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
19122 attr
= dwarf2_attr (die
,
19123 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
19127 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
19130 attr
= dwarf2_attr (die
,
19131 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
19135 file_name_index file_index
= (file_name_index
) DW_UNSND (attr
);
19136 struct file_entry
*fe
;
19138 if (cu
->line_header
!= NULL
)
19139 fe
= cu
->line_header
->file_name_at (file_index
);
19144 complaint (&symfile_complaints
,
19145 _("file index out of range"));
19147 symbol_set_symtab (sym
, fe
->symtab
);
19153 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
19158 addr
= attr_value_as_address (attr
);
19159 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
19160 SYMBOL_VALUE_ADDRESS (sym
) = addr
;
19162 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
19163 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
19164 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
19165 add_symbol_to_list (sym
, cu
->list_in_scope
);
19167 case DW_TAG_subprogram
:
19168 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
19170 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
19171 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
19172 if ((attr2
&& (DW_UNSND (attr2
) != 0))
19173 || cu
->language
== language_ada
)
19175 /* Subprograms marked external are stored as a global symbol.
19176 Ada subprograms, whether marked external or not, are always
19177 stored as a global symbol, because we want to be able to
19178 access them globally. For instance, we want to be able
19179 to break on a nested subprogram without having to
19180 specify the context. */
19181 list_to_add
= &global_symbols
;
19185 list_to_add
= cu
->list_in_scope
;
19188 case DW_TAG_inlined_subroutine
:
19189 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
19191 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
19192 SYMBOL_INLINED (sym
) = 1;
19193 list_to_add
= cu
->list_in_scope
;
19195 case DW_TAG_template_value_param
:
19197 /* Fall through. */
19198 case DW_TAG_constant
:
19199 case DW_TAG_variable
:
19200 case DW_TAG_member
:
19201 /* Compilation with minimal debug info may result in
19202 variables with missing type entries. Change the
19203 misleading `void' type to something sensible. */
19204 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
19205 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_int
;
19207 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
19208 /* In the case of DW_TAG_member, we should only be called for
19209 static const members. */
19210 if (die
->tag
== DW_TAG_member
)
19212 /* dwarf2_add_field uses die_is_declaration,
19213 so we do the same. */
19214 gdb_assert (die_is_declaration (die
, cu
));
19219 dwarf2_const_value (attr
, sym
, cu
);
19220 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
19223 if (attr2
&& (DW_UNSND (attr2
) != 0))
19224 list_to_add
= &global_symbols
;
19226 list_to_add
= cu
->list_in_scope
;
19230 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
19233 var_decode_location (attr
, sym
, cu
);
19234 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
19236 /* Fortran explicitly imports any global symbols to the local
19237 scope by DW_TAG_common_block. */
19238 if (cu
->language
== language_fortran
&& die
->parent
19239 && die
->parent
->tag
== DW_TAG_common_block
)
19242 if (SYMBOL_CLASS (sym
) == LOC_STATIC
19243 && SYMBOL_VALUE_ADDRESS (sym
) == 0
19244 && !dwarf2_per_objfile
->has_section_at_zero
)
19246 /* When a static variable is eliminated by the linker,
19247 the corresponding debug information is not stripped
19248 out, but the variable address is set to null;
19249 do not add such variables into symbol table. */
19251 else if (attr2
&& (DW_UNSND (attr2
) != 0))
19253 /* Workaround gfortran PR debug/40040 - it uses
19254 DW_AT_location for variables in -fPIC libraries which may
19255 get overriden by other libraries/executable and get
19256 a different address. Resolve it by the minimal symbol
19257 which may come from inferior's executable using copy
19258 relocation. Make this workaround only for gfortran as for
19259 other compilers GDB cannot guess the minimal symbol
19260 Fortran mangling kind. */
19261 if (cu
->language
== language_fortran
&& die
->parent
19262 && die
->parent
->tag
== DW_TAG_module
19264 && startswith (cu
->producer
, "GNU Fortran"))
19265 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
19267 /* A variable with DW_AT_external is never static,
19268 but it may be block-scoped. */
19269 list_to_add
= (cu
->list_in_scope
== &file_symbols
19270 ? &global_symbols
: cu
->list_in_scope
);
19273 list_to_add
= cu
->list_in_scope
;
19277 /* We do not know the address of this symbol.
19278 If it is an external symbol and we have type information
19279 for it, enter the symbol as a LOC_UNRESOLVED symbol.
19280 The address of the variable will then be determined from
19281 the minimal symbol table whenever the variable is
19283 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
19285 /* Fortran explicitly imports any global symbols to the local
19286 scope by DW_TAG_common_block. */
19287 if (cu
->language
== language_fortran
&& die
->parent
19288 && die
->parent
->tag
== DW_TAG_common_block
)
19290 /* SYMBOL_CLASS doesn't matter here because
19291 read_common_block is going to reset it. */
19293 list_to_add
= cu
->list_in_scope
;
19295 else if (attr2
&& (DW_UNSND (attr2
) != 0)
19296 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
19298 /* A variable with DW_AT_external is never static, but it
19299 may be block-scoped. */
19300 list_to_add
= (cu
->list_in_scope
== &file_symbols
19301 ? &global_symbols
: cu
->list_in_scope
);
19303 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
19305 else if (!die_is_declaration (die
, cu
))
19307 /* Use the default LOC_OPTIMIZED_OUT class. */
19308 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
19310 list_to_add
= cu
->list_in_scope
;
19314 case DW_TAG_formal_parameter
:
19315 /* If we are inside a function, mark this as an argument. If
19316 not, we might be looking at an argument to an inlined function
19317 when we do not have enough information to show inlined frames;
19318 pretend it's a local variable in that case so that the user can
19320 if (context_stack_depth
> 0
19321 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
19322 SYMBOL_IS_ARGUMENT (sym
) = 1;
19323 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
19326 var_decode_location (attr
, sym
, cu
);
19328 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
19331 dwarf2_const_value (attr
, sym
, cu
);
19334 list_to_add
= cu
->list_in_scope
;
19336 case DW_TAG_unspecified_parameters
:
19337 /* From varargs functions; gdb doesn't seem to have any
19338 interest in this information, so just ignore it for now.
19341 case DW_TAG_template_type_param
:
19343 /* Fall through. */
19344 case DW_TAG_class_type
:
19345 case DW_TAG_interface_type
:
19346 case DW_TAG_structure_type
:
19347 case DW_TAG_union_type
:
19348 case DW_TAG_set_type
:
19349 case DW_TAG_enumeration_type
:
19350 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
19351 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
19354 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
19355 really ever be static objects: otherwise, if you try
19356 to, say, break of a class's method and you're in a file
19357 which doesn't mention that class, it won't work unless
19358 the check for all static symbols in lookup_symbol_aux
19359 saves you. See the OtherFileClass tests in
19360 gdb.c++/namespace.exp. */
19364 list_to_add
= (cu
->list_in_scope
== &file_symbols
19365 && cu
->language
== language_cplus
19366 ? &global_symbols
: cu
->list_in_scope
);
19368 /* The semantics of C++ state that "struct foo {
19369 ... }" also defines a typedef for "foo". */
19370 if (cu
->language
== language_cplus
19371 || cu
->language
== language_ada
19372 || cu
->language
== language_d
19373 || cu
->language
== language_rust
)
19375 /* The symbol's name is already allocated along
19376 with this objfile, so we don't need to
19377 duplicate it for the type. */
19378 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
19379 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
19384 case DW_TAG_typedef
:
19385 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
19386 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
19387 list_to_add
= cu
->list_in_scope
;
19389 case DW_TAG_base_type
:
19390 case DW_TAG_subrange_type
:
19391 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
19392 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
19393 list_to_add
= cu
->list_in_scope
;
19395 case DW_TAG_enumerator
:
19396 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
19399 dwarf2_const_value (attr
, sym
, cu
);
19402 /* NOTE: carlton/2003-11-10: See comment above in the
19403 DW_TAG_class_type, etc. block. */
19405 list_to_add
= (cu
->list_in_scope
== &file_symbols
19406 && cu
->language
== language_cplus
19407 ? &global_symbols
: cu
->list_in_scope
);
19410 case DW_TAG_imported_declaration
:
19411 case DW_TAG_namespace
:
19412 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
19413 list_to_add
= &global_symbols
;
19415 case DW_TAG_module
:
19416 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
19417 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
19418 list_to_add
= &global_symbols
;
19420 case DW_TAG_common_block
:
19421 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
19422 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
19423 add_symbol_to_list (sym
, cu
->list_in_scope
);
19426 /* Not a tag we recognize. Hopefully we aren't processing
19427 trash data, but since we must specifically ignore things
19428 we don't recognize, there is nothing else we should do at
19430 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
19431 dwarf_tag_name (die
->tag
));
19437 sym
->hash_next
= objfile
->template_symbols
;
19438 objfile
->template_symbols
= sym
;
19439 list_to_add
= NULL
;
19442 if (list_to_add
!= NULL
)
19443 add_symbol_to_list (sym
, list_to_add
);
19445 /* For the benefit of old versions of GCC, check for anonymous
19446 namespaces based on the demangled name. */
19447 if (!cu
->processing_has_namespace_info
19448 && cu
->language
== language_cplus
)
19449 cp_scan_for_anonymous_namespaces (sym
, objfile
);
19454 /* A wrapper for new_symbol_full that always allocates a new symbol. */
19456 static struct symbol
*
19457 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
19459 return new_symbol_full (die
, type
, cu
, NULL
);
19462 /* Given an attr with a DW_FORM_dataN value in host byte order,
19463 zero-extend it as appropriate for the symbol's type. The DWARF
19464 standard (v4) is not entirely clear about the meaning of using
19465 DW_FORM_dataN for a constant with a signed type, where the type is
19466 wider than the data. The conclusion of a discussion on the DWARF
19467 list was that this is unspecified. We choose to always zero-extend
19468 because that is the interpretation long in use by GCC. */
19471 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
19472 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
19474 struct objfile
*objfile
= cu
->objfile
;
19475 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
19476 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
19477 LONGEST l
= DW_UNSND (attr
);
19479 if (bits
< sizeof (*value
) * 8)
19481 l
&= ((LONGEST
) 1 << bits
) - 1;
19484 else if (bits
== sizeof (*value
) * 8)
19488 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
19489 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
19496 /* Read a constant value from an attribute. Either set *VALUE, or if
19497 the value does not fit in *VALUE, set *BYTES - either already
19498 allocated on the objfile obstack, or newly allocated on OBSTACK,
19499 or, set *BATON, if we translated the constant to a location
19503 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
19504 const char *name
, struct obstack
*obstack
,
19505 struct dwarf2_cu
*cu
,
19506 LONGEST
*value
, const gdb_byte
**bytes
,
19507 struct dwarf2_locexpr_baton
**baton
)
19509 struct objfile
*objfile
= cu
->objfile
;
19510 struct comp_unit_head
*cu_header
= &cu
->header
;
19511 struct dwarf_block
*blk
;
19512 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
19513 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
19519 switch (attr
->form
)
19522 case DW_FORM_GNU_addr_index
:
19526 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
19527 dwarf2_const_value_length_mismatch_complaint (name
,
19528 cu_header
->addr_size
,
19529 TYPE_LENGTH (type
));
19530 /* Symbols of this form are reasonably rare, so we just
19531 piggyback on the existing location code rather than writing
19532 a new implementation of symbol_computed_ops. */
19533 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
19534 (*baton
)->per_cu
= cu
->per_cu
;
19535 gdb_assert ((*baton
)->per_cu
);
19537 (*baton
)->size
= 2 + cu_header
->addr_size
;
19538 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
19539 (*baton
)->data
= data
;
19541 data
[0] = DW_OP_addr
;
19542 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
19543 byte_order
, DW_ADDR (attr
));
19544 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
19547 case DW_FORM_string
:
19549 case DW_FORM_GNU_str_index
:
19550 case DW_FORM_GNU_strp_alt
:
19551 /* DW_STRING is already allocated on the objfile obstack, point
19553 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
19555 case DW_FORM_block1
:
19556 case DW_FORM_block2
:
19557 case DW_FORM_block4
:
19558 case DW_FORM_block
:
19559 case DW_FORM_exprloc
:
19560 case DW_FORM_data16
:
19561 blk
= DW_BLOCK (attr
);
19562 if (TYPE_LENGTH (type
) != blk
->size
)
19563 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
19564 TYPE_LENGTH (type
));
19565 *bytes
= blk
->data
;
19568 /* The DW_AT_const_value attributes are supposed to carry the
19569 symbol's value "represented as it would be on the target
19570 architecture." By the time we get here, it's already been
19571 converted to host endianness, so we just need to sign- or
19572 zero-extend it as appropriate. */
19573 case DW_FORM_data1
:
19574 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
19576 case DW_FORM_data2
:
19577 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
19579 case DW_FORM_data4
:
19580 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
19582 case DW_FORM_data8
:
19583 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
19586 case DW_FORM_sdata
:
19587 case DW_FORM_implicit_const
:
19588 *value
= DW_SND (attr
);
19591 case DW_FORM_udata
:
19592 *value
= DW_UNSND (attr
);
19596 complaint (&symfile_complaints
,
19597 _("unsupported const value attribute form: '%s'"),
19598 dwarf_form_name (attr
->form
));
19605 /* Copy constant value from an attribute to a symbol. */
19608 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
19609 struct dwarf2_cu
*cu
)
19611 struct objfile
*objfile
= cu
->objfile
;
19613 const gdb_byte
*bytes
;
19614 struct dwarf2_locexpr_baton
*baton
;
19616 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
19617 SYMBOL_PRINT_NAME (sym
),
19618 &objfile
->objfile_obstack
, cu
,
19619 &value
, &bytes
, &baton
);
19623 SYMBOL_LOCATION_BATON (sym
) = baton
;
19624 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
19626 else if (bytes
!= NULL
)
19628 SYMBOL_VALUE_BYTES (sym
) = bytes
;
19629 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
19633 SYMBOL_VALUE (sym
) = value
;
19634 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
19638 /* Return the type of the die in question using its DW_AT_type attribute. */
19640 static struct type
*
19641 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
19643 struct attribute
*type_attr
;
19645 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
19648 /* A missing DW_AT_type represents a void type. */
19649 return objfile_type (cu
->objfile
)->builtin_void
;
19652 return lookup_die_type (die
, type_attr
, cu
);
19655 /* True iff CU's producer generates GNAT Ada auxiliary information
19656 that allows to find parallel types through that information instead
19657 of having to do expensive parallel lookups by type name. */
19660 need_gnat_info (struct dwarf2_cu
*cu
)
19662 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
19663 of GNAT produces this auxiliary information, without any indication
19664 that it is produced. Part of enhancing the FSF version of GNAT
19665 to produce that information will be to put in place an indicator
19666 that we can use in order to determine whether the descriptive type
19667 info is available or not. One suggestion that has been made is
19668 to use a new attribute, attached to the CU die. For now, assume
19669 that the descriptive type info is not available. */
19673 /* Return the auxiliary type of the die in question using its
19674 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
19675 attribute is not present. */
19677 static struct type
*
19678 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
19680 struct attribute
*type_attr
;
19682 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
19686 return lookup_die_type (die
, type_attr
, cu
);
19689 /* If DIE has a descriptive_type attribute, then set the TYPE's
19690 descriptive type accordingly. */
19693 set_descriptive_type (struct type
*type
, struct die_info
*die
,
19694 struct dwarf2_cu
*cu
)
19696 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
19698 if (descriptive_type
)
19700 ALLOCATE_GNAT_AUX_TYPE (type
);
19701 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
19705 /* Return the containing type of the die in question using its
19706 DW_AT_containing_type attribute. */
19708 static struct type
*
19709 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
19711 struct attribute
*type_attr
;
19713 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
19715 error (_("Dwarf Error: Problem turning containing type into gdb type "
19716 "[in module %s]"), objfile_name (cu
->objfile
));
19718 return lookup_die_type (die
, type_attr
, cu
);
19721 /* Return an error marker type to use for the ill formed type in DIE/CU. */
19723 static struct type
*
19724 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
19726 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19727 char *message
, *saved
;
19729 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
19730 objfile_name (objfile
),
19731 to_underlying (cu
->header
.sect_off
),
19732 to_underlying (die
->sect_off
));
19733 saved
= (char *) obstack_copy0 (&objfile
->objfile_obstack
,
19734 message
, strlen (message
));
19737 return init_type (objfile
, TYPE_CODE_ERROR
, 0, saved
);
19740 /* Look up the type of DIE in CU using its type attribute ATTR.
19741 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
19742 DW_AT_containing_type.
19743 If there is no type substitute an error marker. */
19745 static struct type
*
19746 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
19747 struct dwarf2_cu
*cu
)
19749 struct objfile
*objfile
= cu
->objfile
;
19750 struct type
*this_type
;
19752 gdb_assert (attr
->name
== DW_AT_type
19753 || attr
->name
== DW_AT_GNAT_descriptive_type
19754 || attr
->name
== DW_AT_containing_type
);
19756 /* First see if we have it cached. */
19758 if (attr
->form
== DW_FORM_GNU_ref_alt
)
19760 struct dwarf2_per_cu_data
*per_cu
;
19761 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
19763 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, 1, cu
->objfile
);
19764 this_type
= get_die_type_at_offset (sect_off
, per_cu
);
19766 else if (attr_form_is_ref (attr
))
19768 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
19770 this_type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
19772 else if (attr
->form
== DW_FORM_ref_sig8
)
19774 ULONGEST signature
= DW_SIGNATURE (attr
);
19776 return get_signatured_type (die
, signature
, cu
);
19780 complaint (&symfile_complaints
,
19781 _("Dwarf Error: Bad type attribute %s in DIE"
19782 " at 0x%x [in module %s]"),
19783 dwarf_attr_name (attr
->name
), to_underlying (die
->sect_off
),
19784 objfile_name (objfile
));
19785 return build_error_marker_type (cu
, die
);
19788 /* If not cached we need to read it in. */
19790 if (this_type
== NULL
)
19792 struct die_info
*type_die
= NULL
;
19793 struct dwarf2_cu
*type_cu
= cu
;
19795 if (attr_form_is_ref (attr
))
19796 type_die
= follow_die_ref (die
, attr
, &type_cu
);
19797 if (type_die
== NULL
)
19798 return build_error_marker_type (cu
, die
);
19799 /* If we find the type now, it's probably because the type came
19800 from an inter-CU reference and the type's CU got expanded before
19802 this_type
= read_type_die (type_die
, type_cu
);
19805 /* If we still don't have a type use an error marker. */
19807 if (this_type
== NULL
)
19808 return build_error_marker_type (cu
, die
);
19813 /* Return the type in DIE, CU.
19814 Returns NULL for invalid types.
19816 This first does a lookup in die_type_hash,
19817 and only reads the die in if necessary.
19819 NOTE: This can be called when reading in partial or full symbols. */
19821 static struct type
*
19822 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
19824 struct type
*this_type
;
19826 this_type
= get_die_type (die
, cu
);
19830 return read_type_die_1 (die
, cu
);
19833 /* Read the type in DIE, CU.
19834 Returns NULL for invalid types. */
19836 static struct type
*
19837 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
19839 struct type
*this_type
= NULL
;
19843 case DW_TAG_class_type
:
19844 case DW_TAG_interface_type
:
19845 case DW_TAG_structure_type
:
19846 case DW_TAG_union_type
:
19847 this_type
= read_structure_type (die
, cu
);
19849 case DW_TAG_enumeration_type
:
19850 this_type
= read_enumeration_type (die
, cu
);
19852 case DW_TAG_subprogram
:
19853 case DW_TAG_subroutine_type
:
19854 case DW_TAG_inlined_subroutine
:
19855 this_type
= read_subroutine_type (die
, cu
);
19857 case DW_TAG_array_type
:
19858 this_type
= read_array_type (die
, cu
);
19860 case DW_TAG_set_type
:
19861 this_type
= read_set_type (die
, cu
);
19863 case DW_TAG_pointer_type
:
19864 this_type
= read_tag_pointer_type (die
, cu
);
19866 case DW_TAG_ptr_to_member_type
:
19867 this_type
= read_tag_ptr_to_member_type (die
, cu
);
19869 case DW_TAG_reference_type
:
19870 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_REF
);
19872 case DW_TAG_rvalue_reference_type
:
19873 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_RVALUE_REF
);
19875 case DW_TAG_const_type
:
19876 this_type
= read_tag_const_type (die
, cu
);
19878 case DW_TAG_volatile_type
:
19879 this_type
= read_tag_volatile_type (die
, cu
);
19881 case DW_TAG_restrict_type
:
19882 this_type
= read_tag_restrict_type (die
, cu
);
19884 case DW_TAG_string_type
:
19885 this_type
= read_tag_string_type (die
, cu
);
19887 case DW_TAG_typedef
:
19888 this_type
= read_typedef (die
, cu
);
19890 case DW_TAG_subrange_type
:
19891 this_type
= read_subrange_type (die
, cu
);
19893 case DW_TAG_base_type
:
19894 this_type
= read_base_type (die
, cu
);
19896 case DW_TAG_unspecified_type
:
19897 this_type
= read_unspecified_type (die
, cu
);
19899 case DW_TAG_namespace
:
19900 this_type
= read_namespace_type (die
, cu
);
19902 case DW_TAG_module
:
19903 this_type
= read_module_type (die
, cu
);
19905 case DW_TAG_atomic_type
:
19906 this_type
= read_tag_atomic_type (die
, cu
);
19909 complaint (&symfile_complaints
,
19910 _("unexpected tag in read_type_die: '%s'"),
19911 dwarf_tag_name (die
->tag
));
19918 /* See if we can figure out if the class lives in a namespace. We do
19919 this by looking for a member function; its demangled name will
19920 contain namespace info, if there is any.
19921 Return the computed name or NULL.
19922 Space for the result is allocated on the objfile's obstack.
19923 This is the full-die version of guess_partial_die_structure_name.
19924 In this case we know DIE has no useful parent. */
19927 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19929 struct die_info
*spec_die
;
19930 struct dwarf2_cu
*spec_cu
;
19931 struct die_info
*child
;
19934 spec_die
= die_specification (die
, &spec_cu
);
19935 if (spec_die
!= NULL
)
19941 for (child
= die
->child
;
19943 child
= child
->sibling
)
19945 if (child
->tag
== DW_TAG_subprogram
)
19947 const char *linkage_name
= dw2_linkage_name (child
, cu
);
19949 if (linkage_name
!= NULL
)
19952 = language_class_name_from_physname (cu
->language_defn
,
19956 if (actual_name
!= NULL
)
19958 const char *die_name
= dwarf2_name (die
, cu
);
19960 if (die_name
!= NULL
19961 && strcmp (die_name
, actual_name
) != 0)
19963 /* Strip off the class name from the full name.
19964 We want the prefix. */
19965 int die_name_len
= strlen (die_name
);
19966 int actual_name_len
= strlen (actual_name
);
19968 /* Test for '::' as a sanity check. */
19969 if (actual_name_len
> die_name_len
+ 2
19970 && actual_name
[actual_name_len
19971 - die_name_len
- 1] == ':')
19972 name
= (char *) obstack_copy0 (
19973 &cu
->objfile
->per_bfd
->storage_obstack
,
19974 actual_name
, actual_name_len
- die_name_len
- 2);
19977 xfree (actual_name
);
19986 /* GCC might emit a nameless typedef that has a linkage name. Determine the
19987 prefix part in such case. See
19988 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
19990 static const char *
19991 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
19993 struct attribute
*attr
;
19996 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
19997 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
20000 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
20003 attr
= dw2_linkage_name_attr (die
, cu
);
20004 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
20007 /* dwarf2_name had to be already called. */
20008 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
20010 /* Strip the base name, keep any leading namespaces/classes. */
20011 base
= strrchr (DW_STRING (attr
), ':');
20012 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
20015 return (char *) obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
20017 &base
[-1] - DW_STRING (attr
));
20020 /* Return the name of the namespace/class that DIE is defined within,
20021 or "" if we can't tell. The caller should not xfree the result.
20023 For example, if we're within the method foo() in the following
20033 then determine_prefix on foo's die will return "N::C". */
20035 static const char *
20036 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
20038 struct die_info
*parent
, *spec_die
;
20039 struct dwarf2_cu
*spec_cu
;
20040 struct type
*parent_type
;
20041 const char *retval
;
20043 if (cu
->language
!= language_cplus
20044 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
20045 && cu
->language
!= language_rust
)
20048 retval
= anonymous_struct_prefix (die
, cu
);
20052 /* We have to be careful in the presence of DW_AT_specification.
20053 For example, with GCC 3.4, given the code
20057 // Definition of N::foo.
20061 then we'll have a tree of DIEs like this:
20063 1: DW_TAG_compile_unit
20064 2: DW_TAG_namespace // N
20065 3: DW_TAG_subprogram // declaration of N::foo
20066 4: DW_TAG_subprogram // definition of N::foo
20067 DW_AT_specification // refers to die #3
20069 Thus, when processing die #4, we have to pretend that we're in
20070 the context of its DW_AT_specification, namely the contex of die
20073 spec_die
= die_specification (die
, &spec_cu
);
20074 if (spec_die
== NULL
)
20075 parent
= die
->parent
;
20078 parent
= spec_die
->parent
;
20082 if (parent
== NULL
)
20084 else if (parent
->building_fullname
)
20087 const char *parent_name
;
20089 /* It has been seen on RealView 2.2 built binaries,
20090 DW_TAG_template_type_param types actually _defined_ as
20091 children of the parent class:
20094 template class <class Enum> Class{};
20095 Class<enum E> class_e;
20097 1: DW_TAG_class_type (Class)
20098 2: DW_TAG_enumeration_type (E)
20099 3: DW_TAG_enumerator (enum1:0)
20100 3: DW_TAG_enumerator (enum2:1)
20102 2: DW_TAG_template_type_param
20103 DW_AT_type DW_FORM_ref_udata (E)
20105 Besides being broken debug info, it can put GDB into an
20106 infinite loop. Consider:
20108 When we're building the full name for Class<E>, we'll start
20109 at Class, and go look over its template type parameters,
20110 finding E. We'll then try to build the full name of E, and
20111 reach here. We're now trying to build the full name of E,
20112 and look over the parent DIE for containing scope. In the
20113 broken case, if we followed the parent DIE of E, we'd again
20114 find Class, and once again go look at its template type
20115 arguments, etc., etc. Simply don't consider such parent die
20116 as source-level parent of this die (it can't be, the language
20117 doesn't allow it), and break the loop here. */
20118 name
= dwarf2_name (die
, cu
);
20119 parent_name
= dwarf2_name (parent
, cu
);
20120 complaint (&symfile_complaints
,
20121 _("template param type '%s' defined within parent '%s'"),
20122 name
? name
: "<unknown>",
20123 parent_name
? parent_name
: "<unknown>");
20127 switch (parent
->tag
)
20129 case DW_TAG_namespace
:
20130 parent_type
= read_type_die (parent
, cu
);
20131 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
20132 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
20133 Work around this problem here. */
20134 if (cu
->language
== language_cplus
20135 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
20137 /* We give a name to even anonymous namespaces. */
20138 return TYPE_TAG_NAME (parent_type
);
20139 case DW_TAG_class_type
:
20140 case DW_TAG_interface_type
:
20141 case DW_TAG_structure_type
:
20142 case DW_TAG_union_type
:
20143 case DW_TAG_module
:
20144 parent_type
= read_type_die (parent
, cu
);
20145 if (TYPE_TAG_NAME (parent_type
) != NULL
)
20146 return TYPE_TAG_NAME (parent_type
);
20148 /* An anonymous structure is only allowed non-static data
20149 members; no typedefs, no member functions, et cetera.
20150 So it does not need a prefix. */
20152 case DW_TAG_compile_unit
:
20153 case DW_TAG_partial_unit
:
20154 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
20155 if (cu
->language
== language_cplus
20156 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
20157 && die
->child
!= NULL
20158 && (die
->tag
== DW_TAG_class_type
20159 || die
->tag
== DW_TAG_structure_type
20160 || die
->tag
== DW_TAG_union_type
))
20162 char *name
= guess_full_die_structure_name (die
, cu
);
20167 case DW_TAG_enumeration_type
:
20168 parent_type
= read_type_die (parent
, cu
);
20169 if (TYPE_DECLARED_CLASS (parent_type
))
20171 if (TYPE_TAG_NAME (parent_type
) != NULL
)
20172 return TYPE_TAG_NAME (parent_type
);
20175 /* Fall through. */
20177 return determine_prefix (parent
, cu
);
20181 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
20182 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
20183 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
20184 an obconcat, otherwise allocate storage for the result. The CU argument is
20185 used to determine the language and hence, the appropriate separator. */
20187 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
20190 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
20191 int physname
, struct dwarf2_cu
*cu
)
20193 const char *lead
= "";
20196 if (suffix
== NULL
|| suffix
[0] == '\0'
20197 || prefix
== NULL
|| prefix
[0] == '\0')
20199 else if (cu
->language
== language_d
)
20201 /* For D, the 'main' function could be defined in any module, but it
20202 should never be prefixed. */
20203 if (strcmp (suffix
, "D main") == 0)
20211 else if (cu
->language
== language_fortran
&& physname
)
20213 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
20214 DW_AT_MIPS_linkage_name is preferred and used instead. */
20222 if (prefix
== NULL
)
20224 if (suffix
== NULL
)
20231 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
20233 strcpy (retval
, lead
);
20234 strcat (retval
, prefix
);
20235 strcat (retval
, sep
);
20236 strcat (retval
, suffix
);
20241 /* We have an obstack. */
20242 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
20246 /* Return sibling of die, NULL if no sibling. */
20248 static struct die_info
*
20249 sibling_die (struct die_info
*die
)
20251 return die
->sibling
;
20254 /* Get name of a die, return NULL if not found. */
20256 static const char *
20257 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
20258 struct obstack
*obstack
)
20260 if (name
&& cu
->language
== language_cplus
)
20262 std::string canon_name
= cp_canonicalize_string (name
);
20264 if (!canon_name
.empty ())
20266 if (canon_name
!= name
)
20267 name
= (const char *) obstack_copy0 (obstack
,
20268 canon_name
.c_str (),
20269 canon_name
.length ());
20276 /* Get name of a die, return NULL if not found.
20277 Anonymous namespaces are converted to their magic string. */
20279 static const char *
20280 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
20282 struct attribute
*attr
;
20284 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
20285 if ((!attr
|| !DW_STRING (attr
))
20286 && die
->tag
!= DW_TAG_namespace
20287 && die
->tag
!= DW_TAG_class_type
20288 && die
->tag
!= DW_TAG_interface_type
20289 && die
->tag
!= DW_TAG_structure_type
20290 && die
->tag
!= DW_TAG_union_type
)
20295 case DW_TAG_compile_unit
:
20296 case DW_TAG_partial_unit
:
20297 /* Compilation units have a DW_AT_name that is a filename, not
20298 a source language identifier. */
20299 case DW_TAG_enumeration_type
:
20300 case DW_TAG_enumerator
:
20301 /* These tags always have simple identifiers already; no need
20302 to canonicalize them. */
20303 return DW_STRING (attr
);
20305 case DW_TAG_namespace
:
20306 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
20307 return DW_STRING (attr
);
20308 return CP_ANONYMOUS_NAMESPACE_STR
;
20310 case DW_TAG_class_type
:
20311 case DW_TAG_interface_type
:
20312 case DW_TAG_structure_type
:
20313 case DW_TAG_union_type
:
20314 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
20315 structures or unions. These were of the form "._%d" in GCC 4.1,
20316 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
20317 and GCC 4.4. We work around this problem by ignoring these. */
20318 if (attr
&& DW_STRING (attr
)
20319 && (startswith (DW_STRING (attr
), "._")
20320 || startswith (DW_STRING (attr
), "<anonymous")))
20323 /* GCC might emit a nameless typedef that has a linkage name. See
20324 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
20325 if (!attr
|| DW_STRING (attr
) == NULL
)
20327 char *demangled
= NULL
;
20329 attr
= dw2_linkage_name_attr (die
, cu
);
20330 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
20333 /* Avoid demangling DW_STRING (attr) the second time on a second
20334 call for the same DIE. */
20335 if (!DW_STRING_IS_CANONICAL (attr
))
20336 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
20342 /* FIXME: we already did this for the partial symbol... */
20345 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
20346 demangled
, strlen (demangled
)));
20347 DW_STRING_IS_CANONICAL (attr
) = 1;
20350 /* Strip any leading namespaces/classes, keep only the base name.
20351 DW_AT_name for named DIEs does not contain the prefixes. */
20352 base
= strrchr (DW_STRING (attr
), ':');
20353 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
20356 return DW_STRING (attr
);
20365 if (!DW_STRING_IS_CANONICAL (attr
))
20368 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
20369 &cu
->objfile
->per_bfd
->storage_obstack
);
20370 DW_STRING_IS_CANONICAL (attr
) = 1;
20372 return DW_STRING (attr
);
20375 /* Return the die that this die in an extension of, or NULL if there
20376 is none. *EXT_CU is the CU containing DIE on input, and the CU
20377 containing the return value on output. */
20379 static struct die_info
*
20380 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
20382 struct attribute
*attr
;
20384 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
20388 return follow_die_ref (die
, attr
, ext_cu
);
20391 /* Convert a DIE tag into its string name. */
20393 static const char *
20394 dwarf_tag_name (unsigned tag
)
20396 const char *name
= get_DW_TAG_name (tag
);
20399 return "DW_TAG_<unknown>";
20404 /* Convert a DWARF attribute code into its string name. */
20406 static const char *
20407 dwarf_attr_name (unsigned attr
)
20411 #ifdef MIPS /* collides with DW_AT_HP_block_index */
20412 if (attr
== DW_AT_MIPS_fde
)
20413 return "DW_AT_MIPS_fde";
20415 if (attr
== DW_AT_HP_block_index
)
20416 return "DW_AT_HP_block_index";
20419 name
= get_DW_AT_name (attr
);
20422 return "DW_AT_<unknown>";
20427 /* Convert a DWARF value form code into its string name. */
20429 static const char *
20430 dwarf_form_name (unsigned form
)
20432 const char *name
= get_DW_FORM_name (form
);
20435 return "DW_FORM_<unknown>";
20440 static const char *
20441 dwarf_bool_name (unsigned mybool
)
20449 /* Convert a DWARF type code into its string name. */
20451 static const char *
20452 dwarf_type_encoding_name (unsigned enc
)
20454 const char *name
= get_DW_ATE_name (enc
);
20457 return "DW_ATE_<unknown>";
20463 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
20467 print_spaces (indent
, f
);
20468 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
20469 dwarf_tag_name (die
->tag
), die
->abbrev
,
20470 to_underlying (die
->sect_off
));
20472 if (die
->parent
!= NULL
)
20474 print_spaces (indent
, f
);
20475 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
20476 to_underlying (die
->parent
->sect_off
));
20479 print_spaces (indent
, f
);
20480 fprintf_unfiltered (f
, " has children: %s\n",
20481 dwarf_bool_name (die
->child
!= NULL
));
20483 print_spaces (indent
, f
);
20484 fprintf_unfiltered (f
, " attributes:\n");
20486 for (i
= 0; i
< die
->num_attrs
; ++i
)
20488 print_spaces (indent
, f
);
20489 fprintf_unfiltered (f
, " %s (%s) ",
20490 dwarf_attr_name (die
->attrs
[i
].name
),
20491 dwarf_form_name (die
->attrs
[i
].form
));
20493 switch (die
->attrs
[i
].form
)
20496 case DW_FORM_GNU_addr_index
:
20497 fprintf_unfiltered (f
, "address: ");
20498 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
20500 case DW_FORM_block2
:
20501 case DW_FORM_block4
:
20502 case DW_FORM_block
:
20503 case DW_FORM_block1
:
20504 fprintf_unfiltered (f
, "block: size %s",
20505 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
20507 case DW_FORM_exprloc
:
20508 fprintf_unfiltered (f
, "expression: size %s",
20509 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
20511 case DW_FORM_data16
:
20512 fprintf_unfiltered (f
, "constant of 16 bytes");
20514 case DW_FORM_ref_addr
:
20515 fprintf_unfiltered (f
, "ref address: ");
20516 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
20518 case DW_FORM_GNU_ref_alt
:
20519 fprintf_unfiltered (f
, "alt ref address: ");
20520 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
20526 case DW_FORM_ref_udata
:
20527 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
20528 (long) (DW_UNSND (&die
->attrs
[i
])));
20530 case DW_FORM_data1
:
20531 case DW_FORM_data2
:
20532 case DW_FORM_data4
:
20533 case DW_FORM_data8
:
20534 case DW_FORM_udata
:
20535 case DW_FORM_sdata
:
20536 fprintf_unfiltered (f
, "constant: %s",
20537 pulongest (DW_UNSND (&die
->attrs
[i
])));
20539 case DW_FORM_sec_offset
:
20540 fprintf_unfiltered (f
, "section offset: %s",
20541 pulongest (DW_UNSND (&die
->attrs
[i
])));
20543 case DW_FORM_ref_sig8
:
20544 fprintf_unfiltered (f
, "signature: %s",
20545 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
20547 case DW_FORM_string
:
20549 case DW_FORM_line_strp
:
20550 case DW_FORM_GNU_str_index
:
20551 case DW_FORM_GNU_strp_alt
:
20552 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
20553 DW_STRING (&die
->attrs
[i
])
20554 ? DW_STRING (&die
->attrs
[i
]) : "",
20555 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
20558 if (DW_UNSND (&die
->attrs
[i
]))
20559 fprintf_unfiltered (f
, "flag: TRUE");
20561 fprintf_unfiltered (f
, "flag: FALSE");
20563 case DW_FORM_flag_present
:
20564 fprintf_unfiltered (f
, "flag: TRUE");
20566 case DW_FORM_indirect
:
20567 /* The reader will have reduced the indirect form to
20568 the "base form" so this form should not occur. */
20569 fprintf_unfiltered (f
,
20570 "unexpected attribute form: DW_FORM_indirect");
20572 case DW_FORM_implicit_const
:
20573 fprintf_unfiltered (f
, "constant: %s",
20574 plongest (DW_SND (&die
->attrs
[i
])));
20577 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
20578 die
->attrs
[i
].form
);
20581 fprintf_unfiltered (f
, "\n");
20586 dump_die_for_error (struct die_info
*die
)
20588 dump_die_shallow (gdb_stderr
, 0, die
);
20592 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
20594 int indent
= level
* 4;
20596 gdb_assert (die
!= NULL
);
20598 if (level
>= max_level
)
20601 dump_die_shallow (f
, indent
, die
);
20603 if (die
->child
!= NULL
)
20605 print_spaces (indent
, f
);
20606 fprintf_unfiltered (f
, " Children:");
20607 if (level
+ 1 < max_level
)
20609 fprintf_unfiltered (f
, "\n");
20610 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
20614 fprintf_unfiltered (f
,
20615 " [not printed, max nesting level reached]\n");
20619 if (die
->sibling
!= NULL
&& level
> 0)
20621 dump_die_1 (f
, level
, max_level
, die
->sibling
);
20625 /* This is called from the pdie macro in gdbinit.in.
20626 It's not static so gcc will keep a copy callable from gdb. */
20629 dump_die (struct die_info
*die
, int max_level
)
20631 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
20635 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
20639 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
,
20640 to_underlying (die
->sect_off
),
20646 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
20650 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
20652 if (attr_form_is_ref (attr
))
20653 return (sect_offset
) DW_UNSND (attr
);
20655 complaint (&symfile_complaints
,
20656 _("unsupported die ref attribute form: '%s'"),
20657 dwarf_form_name (attr
->form
));
20661 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
20662 * the value held by the attribute is not constant. */
20665 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
20667 if (attr
->form
== DW_FORM_sdata
|| attr
->form
== DW_FORM_implicit_const
)
20668 return DW_SND (attr
);
20669 else if (attr
->form
== DW_FORM_udata
20670 || attr
->form
== DW_FORM_data1
20671 || attr
->form
== DW_FORM_data2
20672 || attr
->form
== DW_FORM_data4
20673 || attr
->form
== DW_FORM_data8
)
20674 return DW_UNSND (attr
);
20677 /* For DW_FORM_data16 see attr_form_is_constant. */
20678 complaint (&symfile_complaints
,
20679 _("Attribute value is not a constant (%s)"),
20680 dwarf_form_name (attr
->form
));
20681 return default_value
;
20685 /* Follow reference or signature attribute ATTR of SRC_DIE.
20686 On entry *REF_CU is the CU of SRC_DIE.
20687 On exit *REF_CU is the CU of the result. */
20689 static struct die_info
*
20690 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
20691 struct dwarf2_cu
**ref_cu
)
20693 struct die_info
*die
;
20695 if (attr_form_is_ref (attr
))
20696 die
= follow_die_ref (src_die
, attr
, ref_cu
);
20697 else if (attr
->form
== DW_FORM_ref_sig8
)
20698 die
= follow_die_sig (src_die
, attr
, ref_cu
);
20701 dump_die_for_error (src_die
);
20702 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
20703 objfile_name ((*ref_cu
)->objfile
));
20709 /* Follow reference OFFSET.
20710 On entry *REF_CU is the CU of the source die referencing OFFSET.
20711 On exit *REF_CU is the CU of the result.
20712 Returns NULL if OFFSET is invalid. */
20714 static struct die_info
*
20715 follow_die_offset (sect_offset sect_off
, int offset_in_dwz
,
20716 struct dwarf2_cu
**ref_cu
)
20718 struct die_info temp_die
;
20719 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
20721 gdb_assert (cu
->per_cu
!= NULL
);
20725 if (cu
->per_cu
->is_debug_types
)
20727 /* .debug_types CUs cannot reference anything outside their CU.
20728 If they need to, they have to reference a signatured type via
20729 DW_FORM_ref_sig8. */
20730 if (!offset_in_cu_p (&cu
->header
, sect_off
))
20733 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
20734 || !offset_in_cu_p (&cu
->header
, sect_off
))
20736 struct dwarf2_per_cu_data
*per_cu
;
20738 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
20741 /* If necessary, add it to the queue and load its DIEs. */
20742 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
20743 load_full_comp_unit (per_cu
, cu
->language
);
20745 target_cu
= per_cu
->cu
;
20747 else if (cu
->dies
== NULL
)
20749 /* We're loading full DIEs during partial symbol reading. */
20750 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
20751 load_full_comp_unit (cu
->per_cu
, language_minimal
);
20754 *ref_cu
= target_cu
;
20755 temp_die
.sect_off
= sect_off
;
20756 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
20758 to_underlying (sect_off
));
20761 /* Follow reference attribute ATTR of SRC_DIE.
20762 On entry *REF_CU is the CU of SRC_DIE.
20763 On exit *REF_CU is the CU of the result. */
20765 static struct die_info
*
20766 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
20767 struct dwarf2_cu
**ref_cu
)
20769 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
20770 struct dwarf2_cu
*cu
= *ref_cu
;
20771 struct die_info
*die
;
20773 die
= follow_die_offset (sect_off
,
20774 (attr
->form
== DW_FORM_GNU_ref_alt
20775 || cu
->per_cu
->is_dwz
),
20778 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
20779 "at 0x%x [in module %s]"),
20780 to_underlying (sect_off
), to_underlying (src_die
->sect_off
),
20781 objfile_name (cu
->objfile
));
20786 /* Return DWARF block referenced by DW_AT_location of DIE at SECT_OFF at PER_CU.
20787 Returned value is intended for DW_OP_call*. Returned
20788 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
20790 struct dwarf2_locexpr_baton
20791 dwarf2_fetch_die_loc_sect_off (sect_offset sect_off
,
20792 struct dwarf2_per_cu_data
*per_cu
,
20793 CORE_ADDR (*get_frame_pc
) (void *baton
),
20796 struct dwarf2_cu
*cu
;
20797 struct die_info
*die
;
20798 struct attribute
*attr
;
20799 struct dwarf2_locexpr_baton retval
;
20801 dw2_setup (per_cu
->objfile
);
20803 if (per_cu
->cu
== NULL
)
20808 /* We shouldn't get here for a dummy CU, but don't crash on the user.
20809 Instead just throw an error, not much else we can do. */
20810 error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"),
20811 to_underlying (sect_off
), objfile_name (per_cu
->objfile
));
20814 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
20816 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
20817 to_underlying (sect_off
), objfile_name (per_cu
->objfile
));
20819 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
20822 /* DWARF: "If there is no such attribute, then there is no effect.".
20823 DATA is ignored if SIZE is 0. */
20825 retval
.data
= NULL
;
20828 else if (attr_form_is_section_offset (attr
))
20830 struct dwarf2_loclist_baton loclist_baton
;
20831 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
20834 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
20836 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
20838 retval
.size
= size
;
20842 if (!attr_form_is_block (attr
))
20843 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
20844 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
20845 to_underlying (sect_off
), objfile_name (per_cu
->objfile
));
20847 retval
.data
= DW_BLOCK (attr
)->data
;
20848 retval
.size
= DW_BLOCK (attr
)->size
;
20850 retval
.per_cu
= cu
->per_cu
;
20852 age_cached_comp_units ();
20857 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
20860 struct dwarf2_locexpr_baton
20861 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
20862 struct dwarf2_per_cu_data
*per_cu
,
20863 CORE_ADDR (*get_frame_pc
) (void *baton
),
20866 sect_offset sect_off
= per_cu
->sect_off
+ to_underlying (offset_in_cu
);
20868 return dwarf2_fetch_die_loc_sect_off (sect_off
, per_cu
, get_frame_pc
, baton
);
20871 /* Write a constant of a given type as target-ordered bytes into
20874 static const gdb_byte
*
20875 write_constant_as_bytes (struct obstack
*obstack
,
20876 enum bfd_endian byte_order
,
20883 *len
= TYPE_LENGTH (type
);
20884 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
20885 store_unsigned_integer (result
, *len
, byte_order
, value
);
20890 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
20891 pointer to the constant bytes and set LEN to the length of the
20892 data. If memory is needed, allocate it on OBSTACK. If the DIE
20893 does not have a DW_AT_const_value, return NULL. */
20896 dwarf2_fetch_constant_bytes (sect_offset sect_off
,
20897 struct dwarf2_per_cu_data
*per_cu
,
20898 struct obstack
*obstack
,
20901 struct dwarf2_cu
*cu
;
20902 struct die_info
*die
;
20903 struct attribute
*attr
;
20904 const gdb_byte
*result
= NULL
;
20907 enum bfd_endian byte_order
;
20909 dw2_setup (per_cu
->objfile
);
20911 if (per_cu
->cu
== NULL
)
20916 /* We shouldn't get here for a dummy CU, but don't crash on the user.
20917 Instead just throw an error, not much else we can do. */
20918 error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"),
20919 to_underlying (sect_off
), objfile_name (per_cu
->objfile
));
20922 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
20924 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
20925 to_underlying (sect_off
), objfile_name (per_cu
->objfile
));
20928 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20932 byte_order
= (bfd_big_endian (per_cu
->objfile
->obfd
)
20933 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
20935 switch (attr
->form
)
20938 case DW_FORM_GNU_addr_index
:
20942 *len
= cu
->header
.addr_size
;
20943 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
20944 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
20948 case DW_FORM_string
:
20950 case DW_FORM_GNU_str_index
:
20951 case DW_FORM_GNU_strp_alt
:
20952 /* DW_STRING is already allocated on the objfile obstack, point
20954 result
= (const gdb_byte
*) DW_STRING (attr
);
20955 *len
= strlen (DW_STRING (attr
));
20957 case DW_FORM_block1
:
20958 case DW_FORM_block2
:
20959 case DW_FORM_block4
:
20960 case DW_FORM_block
:
20961 case DW_FORM_exprloc
:
20962 case DW_FORM_data16
:
20963 result
= DW_BLOCK (attr
)->data
;
20964 *len
= DW_BLOCK (attr
)->size
;
20967 /* The DW_AT_const_value attributes are supposed to carry the
20968 symbol's value "represented as it would be on the target
20969 architecture." By the time we get here, it's already been
20970 converted to host endianness, so we just need to sign- or
20971 zero-extend it as appropriate. */
20972 case DW_FORM_data1
:
20973 type
= die_type (die
, cu
);
20974 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
20975 if (result
== NULL
)
20976 result
= write_constant_as_bytes (obstack
, byte_order
,
20979 case DW_FORM_data2
:
20980 type
= die_type (die
, cu
);
20981 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
20982 if (result
== NULL
)
20983 result
= write_constant_as_bytes (obstack
, byte_order
,
20986 case DW_FORM_data4
:
20987 type
= die_type (die
, cu
);
20988 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
20989 if (result
== NULL
)
20990 result
= write_constant_as_bytes (obstack
, byte_order
,
20993 case DW_FORM_data8
:
20994 type
= die_type (die
, cu
);
20995 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
20996 if (result
== NULL
)
20997 result
= write_constant_as_bytes (obstack
, byte_order
,
21001 case DW_FORM_sdata
:
21002 case DW_FORM_implicit_const
:
21003 type
= die_type (die
, cu
);
21004 result
= write_constant_as_bytes (obstack
, byte_order
,
21005 type
, DW_SND (attr
), len
);
21008 case DW_FORM_udata
:
21009 type
= die_type (die
, cu
);
21010 result
= write_constant_as_bytes (obstack
, byte_order
,
21011 type
, DW_UNSND (attr
), len
);
21015 complaint (&symfile_complaints
,
21016 _("unsupported const value attribute form: '%s'"),
21017 dwarf_form_name (attr
->form
));
21024 /* Return the type of the die at OFFSET in PER_CU. Return NULL if no
21025 valid type for this die is found. */
21028 dwarf2_fetch_die_type_sect_off (sect_offset sect_off
,
21029 struct dwarf2_per_cu_data
*per_cu
)
21031 struct dwarf2_cu
*cu
;
21032 struct die_info
*die
;
21034 dw2_setup (per_cu
->objfile
);
21036 if (per_cu
->cu
== NULL
)
21042 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
21046 return die_type (die
, cu
);
21049 /* Return the type of the DIE at DIE_OFFSET in the CU named by
21053 dwarf2_get_die_type (cu_offset die_offset
,
21054 struct dwarf2_per_cu_data
*per_cu
)
21056 dw2_setup (per_cu
->objfile
);
21058 sect_offset die_offset_sect
= per_cu
->sect_off
+ to_underlying (die_offset
);
21059 return get_die_type_at_offset (die_offset_sect
, per_cu
);
21062 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
21063 On entry *REF_CU is the CU of SRC_DIE.
21064 On exit *REF_CU is the CU of the result.
21065 Returns NULL if the referenced DIE isn't found. */
21067 static struct die_info
*
21068 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
21069 struct dwarf2_cu
**ref_cu
)
21071 struct die_info temp_die
;
21072 struct dwarf2_cu
*sig_cu
;
21073 struct die_info
*die
;
21075 /* While it might be nice to assert sig_type->type == NULL here,
21076 we can get here for DW_AT_imported_declaration where we need
21077 the DIE not the type. */
21079 /* If necessary, add it to the queue and load its DIEs. */
21081 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
21082 read_signatured_type (sig_type
);
21084 sig_cu
= sig_type
->per_cu
.cu
;
21085 gdb_assert (sig_cu
!= NULL
);
21086 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
21087 temp_die
.sect_off
= sig_type
->type_offset_in_section
;
21088 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
21089 to_underlying (temp_die
.sect_off
));
21092 /* For .gdb_index version 7 keep track of included TUs.
21093 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
21094 if (dwarf2_per_objfile
->index_table
!= NULL
21095 && dwarf2_per_objfile
->index_table
->version
<= 7)
21097 VEC_safe_push (dwarf2_per_cu_ptr
,
21098 (*ref_cu
)->per_cu
->imported_symtabs
,
21109 /* Follow signatured type referenced by ATTR in SRC_DIE.
21110 On entry *REF_CU is the CU of SRC_DIE.
21111 On exit *REF_CU is the CU of the result.
21112 The result is the DIE of the type.
21113 If the referenced type cannot be found an error is thrown. */
21115 static struct die_info
*
21116 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
21117 struct dwarf2_cu
**ref_cu
)
21119 ULONGEST signature
= DW_SIGNATURE (attr
);
21120 struct signatured_type
*sig_type
;
21121 struct die_info
*die
;
21123 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
21125 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
21126 /* sig_type will be NULL if the signatured type is missing from
21128 if (sig_type
== NULL
)
21130 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
21131 " from DIE at 0x%x [in module %s]"),
21132 hex_string (signature
), to_underlying (src_die
->sect_off
),
21133 objfile_name ((*ref_cu
)->objfile
));
21136 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
21139 dump_die_for_error (src_die
);
21140 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
21141 " from DIE at 0x%x [in module %s]"),
21142 hex_string (signature
), to_underlying (src_die
->sect_off
),
21143 objfile_name ((*ref_cu
)->objfile
));
21149 /* Get the type specified by SIGNATURE referenced in DIE/CU,
21150 reading in and processing the type unit if necessary. */
21152 static struct type
*
21153 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
21154 struct dwarf2_cu
*cu
)
21156 struct signatured_type
*sig_type
;
21157 struct dwarf2_cu
*type_cu
;
21158 struct die_info
*type_die
;
21161 sig_type
= lookup_signatured_type (cu
, signature
);
21162 /* sig_type will be NULL if the signatured type is missing from
21164 if (sig_type
== NULL
)
21166 complaint (&symfile_complaints
,
21167 _("Dwarf Error: Cannot find signatured DIE %s referenced"
21168 " from DIE at 0x%x [in module %s]"),
21169 hex_string (signature
), to_underlying (die
->sect_off
),
21170 objfile_name (dwarf2_per_objfile
->objfile
));
21171 return build_error_marker_type (cu
, die
);
21174 /* If we already know the type we're done. */
21175 if (sig_type
->type
!= NULL
)
21176 return sig_type
->type
;
21179 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
21180 if (type_die
!= NULL
)
21182 /* N.B. We need to call get_die_type to ensure only one type for this DIE
21183 is created. This is important, for example, because for c++ classes
21184 we need TYPE_NAME set which is only done by new_symbol. Blech. */
21185 type
= read_type_die (type_die
, type_cu
);
21188 complaint (&symfile_complaints
,
21189 _("Dwarf Error: Cannot build signatured type %s"
21190 " referenced from DIE at 0x%x [in module %s]"),
21191 hex_string (signature
), to_underlying (die
->sect_off
),
21192 objfile_name (dwarf2_per_objfile
->objfile
));
21193 type
= build_error_marker_type (cu
, die
);
21198 complaint (&symfile_complaints
,
21199 _("Dwarf Error: Problem reading signatured DIE %s referenced"
21200 " from DIE at 0x%x [in module %s]"),
21201 hex_string (signature
), to_underlying (die
->sect_off
),
21202 objfile_name (dwarf2_per_objfile
->objfile
));
21203 type
= build_error_marker_type (cu
, die
);
21205 sig_type
->type
= type
;
21210 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
21211 reading in and processing the type unit if necessary. */
21213 static struct type
*
21214 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
21215 struct dwarf2_cu
*cu
) /* ARI: editCase function */
21217 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
21218 if (attr_form_is_ref (attr
))
21220 struct dwarf2_cu
*type_cu
= cu
;
21221 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
21223 return read_type_die (type_die
, type_cu
);
21225 else if (attr
->form
== DW_FORM_ref_sig8
)
21227 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
21231 complaint (&symfile_complaints
,
21232 _("Dwarf Error: DW_AT_signature has bad form %s in DIE"
21233 " at 0x%x [in module %s]"),
21234 dwarf_form_name (attr
->form
), to_underlying (die
->sect_off
),
21235 objfile_name (dwarf2_per_objfile
->objfile
));
21236 return build_error_marker_type (cu
, die
);
21240 /* Load the DIEs associated with type unit PER_CU into memory. */
21243 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
21245 struct signatured_type
*sig_type
;
21247 /* Caller is responsible for ensuring type_unit_groups don't get here. */
21248 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
21250 /* We have the per_cu, but we need the signatured_type.
21251 Fortunately this is an easy translation. */
21252 gdb_assert (per_cu
->is_debug_types
);
21253 sig_type
= (struct signatured_type
*) per_cu
;
21255 gdb_assert (per_cu
->cu
== NULL
);
21257 read_signatured_type (sig_type
);
21259 gdb_assert (per_cu
->cu
!= NULL
);
21262 /* die_reader_func for read_signatured_type.
21263 This is identical to load_full_comp_unit_reader,
21264 but is kept separate for now. */
21267 read_signatured_type_reader (const struct die_reader_specs
*reader
,
21268 const gdb_byte
*info_ptr
,
21269 struct die_info
*comp_unit_die
,
21273 struct dwarf2_cu
*cu
= reader
->cu
;
21275 gdb_assert (cu
->die_hash
== NULL
);
21277 htab_create_alloc_ex (cu
->header
.length
/ 12,
21281 &cu
->comp_unit_obstack
,
21282 hashtab_obstack_allocate
,
21283 dummy_obstack_deallocate
);
21286 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
21287 &info_ptr
, comp_unit_die
);
21288 cu
->dies
= comp_unit_die
;
21289 /* comp_unit_die is not stored in die_hash, no need. */
21291 /* We try not to read any attributes in this function, because not
21292 all CUs needed for references have been loaded yet, and symbol
21293 table processing isn't initialized. But we have to set the CU language,
21294 or we won't be able to build types correctly.
21295 Similarly, if we do not read the producer, we can not apply
21296 producer-specific interpretation. */
21297 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
21300 /* Read in a signatured type and build its CU and DIEs.
21301 If the type is a stub for the real type in a DWO file,
21302 read in the real type from the DWO file as well. */
21305 read_signatured_type (struct signatured_type
*sig_type
)
21307 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
21309 gdb_assert (per_cu
->is_debug_types
);
21310 gdb_assert (per_cu
->cu
== NULL
);
21312 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
21313 read_signatured_type_reader
, NULL
);
21314 sig_type
->per_cu
.tu_read
= 1;
21317 /* Decode simple location descriptions.
21318 Given a pointer to a dwarf block that defines a location, compute
21319 the location and return the value.
21321 NOTE drow/2003-11-18: This function is called in two situations
21322 now: for the address of static or global variables (partial symbols
21323 only) and for offsets into structures which are expected to be
21324 (more or less) constant. The partial symbol case should go away,
21325 and only the constant case should remain. That will let this
21326 function complain more accurately. A few special modes are allowed
21327 without complaint for global variables (for instance, global
21328 register values and thread-local values).
21330 A location description containing no operations indicates that the
21331 object is optimized out. The return value is 0 for that case.
21332 FIXME drow/2003-11-16: No callers check for this case any more; soon all
21333 callers will only want a very basic result and this can become a
21336 Note that stack[0] is unused except as a default error return. */
21339 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
21341 struct objfile
*objfile
= cu
->objfile
;
21343 size_t size
= blk
->size
;
21344 const gdb_byte
*data
= blk
->data
;
21345 CORE_ADDR stack
[64];
21347 unsigned int bytes_read
, unsnd
;
21353 stack
[++stacki
] = 0;
21392 stack
[++stacki
] = op
- DW_OP_lit0
;
21427 stack
[++stacki
] = op
- DW_OP_reg0
;
21429 dwarf2_complex_location_expr_complaint ();
21433 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
21435 stack
[++stacki
] = unsnd
;
21437 dwarf2_complex_location_expr_complaint ();
21441 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
21446 case DW_OP_const1u
:
21447 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
21451 case DW_OP_const1s
:
21452 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
21456 case DW_OP_const2u
:
21457 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
21461 case DW_OP_const2s
:
21462 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
21466 case DW_OP_const4u
:
21467 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
21471 case DW_OP_const4s
:
21472 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
21476 case DW_OP_const8u
:
21477 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
21482 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
21488 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
21493 stack
[stacki
+ 1] = stack
[stacki
];
21498 stack
[stacki
- 1] += stack
[stacki
];
21502 case DW_OP_plus_uconst
:
21503 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
21509 stack
[stacki
- 1] -= stack
[stacki
];
21514 /* If we're not the last op, then we definitely can't encode
21515 this using GDB's address_class enum. This is valid for partial
21516 global symbols, although the variable's address will be bogus
21519 dwarf2_complex_location_expr_complaint ();
21522 case DW_OP_GNU_push_tls_address
:
21523 case DW_OP_form_tls_address
:
21524 /* The top of the stack has the offset from the beginning
21525 of the thread control block at which the variable is located. */
21526 /* Nothing should follow this operator, so the top of stack would
21528 /* This is valid for partial global symbols, but the variable's
21529 address will be bogus in the psymtab. Make it always at least
21530 non-zero to not look as a variable garbage collected by linker
21531 which have DW_OP_addr 0. */
21533 dwarf2_complex_location_expr_complaint ();
21537 case DW_OP_GNU_uninit
:
21540 case DW_OP_GNU_addr_index
:
21541 case DW_OP_GNU_const_index
:
21542 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
21549 const char *name
= get_DW_OP_name (op
);
21552 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
21555 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
21559 return (stack
[stacki
]);
21562 /* Enforce maximum stack depth of SIZE-1 to avoid writing
21563 outside of the allocated space. Also enforce minimum>0. */
21564 if (stacki
>= ARRAY_SIZE (stack
) - 1)
21566 complaint (&symfile_complaints
,
21567 _("location description stack overflow"));
21573 complaint (&symfile_complaints
,
21574 _("location description stack underflow"));
21578 return (stack
[stacki
]);
21581 /* memory allocation interface */
21583 static struct dwarf_block
*
21584 dwarf_alloc_block (struct dwarf2_cu
*cu
)
21586 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
21589 static struct die_info
*
21590 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
21592 struct die_info
*die
;
21593 size_t size
= sizeof (struct die_info
);
21596 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
21598 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
21599 memset (die
, 0, sizeof (struct die_info
));
21604 /* Macro support. */
21606 /* Return file name relative to the compilation directory of file number I in
21607 *LH's file name table. The result is allocated using xmalloc; the caller is
21608 responsible for freeing it. */
21611 file_file_name (int file
, struct line_header
*lh
)
21613 /* Is the file number a valid index into the line header's file name
21614 table? Remember that file numbers start with one, not zero. */
21615 if (1 <= file
&& file
<= lh
->file_names
.size ())
21617 const file_entry
&fe
= lh
->file_names
[file
- 1];
21619 if (!IS_ABSOLUTE_PATH (fe
.name
))
21621 const char *dir
= fe
.include_dir (lh
);
21623 return concat (dir
, SLASH_STRING
, fe
.name
, (char *) NULL
);
21625 return xstrdup (fe
.name
);
21629 /* The compiler produced a bogus file number. We can at least
21630 record the macro definitions made in the file, even if we
21631 won't be able to find the file by name. */
21632 char fake_name
[80];
21634 xsnprintf (fake_name
, sizeof (fake_name
),
21635 "<bad macro file number %d>", file
);
21637 complaint (&symfile_complaints
,
21638 _("bad file number in macro information (%d)"),
21641 return xstrdup (fake_name
);
21645 /* Return the full name of file number I in *LH's file name table.
21646 Use COMP_DIR as the name of the current directory of the
21647 compilation. The result is allocated using xmalloc; the caller is
21648 responsible for freeing it. */
21650 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
21652 /* Is the file number a valid index into the line header's file name
21653 table? Remember that file numbers start with one, not zero. */
21654 if (1 <= file
&& file
<= lh
->file_names
.size ())
21656 char *relative
= file_file_name (file
, lh
);
21658 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
21660 return reconcat (relative
, comp_dir
, SLASH_STRING
,
21661 relative
, (char *) NULL
);
21664 return file_file_name (file
, lh
);
21668 static struct macro_source_file
*
21669 macro_start_file (int file
, int line
,
21670 struct macro_source_file
*current_file
,
21671 struct line_header
*lh
)
21673 /* File name relative to the compilation directory of this source file. */
21674 char *file_name
= file_file_name (file
, lh
);
21676 if (! current_file
)
21678 /* Note: We don't create a macro table for this compilation unit
21679 at all until we actually get a filename. */
21680 struct macro_table
*macro_table
= get_macro_table ();
21682 /* If we have no current file, then this must be the start_file
21683 directive for the compilation unit's main source file. */
21684 current_file
= macro_set_main (macro_table
, file_name
);
21685 macro_define_special (macro_table
);
21688 current_file
= macro_include (current_file
, line
, file_name
);
21692 return current_file
;
21695 static const char *
21696 consume_improper_spaces (const char *p
, const char *body
)
21700 complaint (&symfile_complaints
,
21701 _("macro definition contains spaces "
21702 "in formal argument list:\n`%s'"),
21714 parse_macro_definition (struct macro_source_file
*file
, int line
,
21719 /* The body string takes one of two forms. For object-like macro
21720 definitions, it should be:
21722 <macro name> " " <definition>
21724 For function-like macro definitions, it should be:
21726 <macro name> "() " <definition>
21728 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
21730 Spaces may appear only where explicitly indicated, and in the
21733 The Dwarf 2 spec says that an object-like macro's name is always
21734 followed by a space, but versions of GCC around March 2002 omit
21735 the space when the macro's definition is the empty string.
21737 The Dwarf 2 spec says that there should be no spaces between the
21738 formal arguments in a function-like macro's formal argument list,
21739 but versions of GCC around March 2002 include spaces after the
21743 /* Find the extent of the macro name. The macro name is terminated
21744 by either a space or null character (for an object-like macro) or
21745 an opening paren (for a function-like macro). */
21746 for (p
= body
; *p
; p
++)
21747 if (*p
== ' ' || *p
== '(')
21750 if (*p
== ' ' || *p
== '\0')
21752 /* It's an object-like macro. */
21753 int name_len
= p
- body
;
21754 char *name
= savestring (body
, name_len
);
21755 const char *replacement
;
21758 replacement
= body
+ name_len
+ 1;
21761 dwarf2_macro_malformed_definition_complaint (body
);
21762 replacement
= body
+ name_len
;
21765 macro_define_object (file
, line
, name
, replacement
);
21769 else if (*p
== '(')
21771 /* It's a function-like macro. */
21772 char *name
= savestring (body
, p
- body
);
21775 char **argv
= XNEWVEC (char *, argv_size
);
21779 p
= consume_improper_spaces (p
, body
);
21781 /* Parse the formal argument list. */
21782 while (*p
&& *p
!= ')')
21784 /* Find the extent of the current argument name. */
21785 const char *arg_start
= p
;
21787 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
21790 if (! *p
|| p
== arg_start
)
21791 dwarf2_macro_malformed_definition_complaint (body
);
21794 /* Make sure argv has room for the new argument. */
21795 if (argc
>= argv_size
)
21798 argv
= XRESIZEVEC (char *, argv
, argv_size
);
21801 argv
[argc
++] = savestring (arg_start
, p
- arg_start
);
21804 p
= consume_improper_spaces (p
, body
);
21806 /* Consume the comma, if present. */
21811 p
= consume_improper_spaces (p
, body
);
21820 /* Perfectly formed definition, no complaints. */
21821 macro_define_function (file
, line
, name
,
21822 argc
, (const char **) argv
,
21824 else if (*p
== '\0')
21826 /* Complain, but do define it. */
21827 dwarf2_macro_malformed_definition_complaint (body
);
21828 macro_define_function (file
, line
, name
,
21829 argc
, (const char **) argv
,
21833 /* Just complain. */
21834 dwarf2_macro_malformed_definition_complaint (body
);
21837 /* Just complain. */
21838 dwarf2_macro_malformed_definition_complaint (body
);
21844 for (i
= 0; i
< argc
; i
++)
21850 dwarf2_macro_malformed_definition_complaint (body
);
21853 /* Skip some bytes from BYTES according to the form given in FORM.
21854 Returns the new pointer. */
21856 static const gdb_byte
*
21857 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
21858 enum dwarf_form form
,
21859 unsigned int offset_size
,
21860 struct dwarf2_section_info
*section
)
21862 unsigned int bytes_read
;
21866 case DW_FORM_data1
:
21871 case DW_FORM_data2
:
21875 case DW_FORM_data4
:
21879 case DW_FORM_data8
:
21883 case DW_FORM_data16
:
21887 case DW_FORM_string
:
21888 read_direct_string (abfd
, bytes
, &bytes_read
);
21889 bytes
+= bytes_read
;
21892 case DW_FORM_sec_offset
:
21894 case DW_FORM_GNU_strp_alt
:
21895 bytes
+= offset_size
;
21898 case DW_FORM_block
:
21899 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
21900 bytes
+= bytes_read
;
21903 case DW_FORM_block1
:
21904 bytes
+= 1 + read_1_byte (abfd
, bytes
);
21906 case DW_FORM_block2
:
21907 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
21909 case DW_FORM_block4
:
21910 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
21913 case DW_FORM_sdata
:
21914 case DW_FORM_udata
:
21915 case DW_FORM_GNU_addr_index
:
21916 case DW_FORM_GNU_str_index
:
21917 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
21920 dwarf2_section_buffer_overflow_complaint (section
);
21925 case DW_FORM_implicit_const
:
21931 complaint (&symfile_complaints
,
21932 _("invalid form 0x%x in `%s'"),
21933 form
, get_section_name (section
));
21941 /* A helper for dwarf_decode_macros that handles skipping an unknown
21942 opcode. Returns an updated pointer to the macro data buffer; or,
21943 on error, issues a complaint and returns NULL. */
21945 static const gdb_byte
*
21946 skip_unknown_opcode (unsigned int opcode
,
21947 const gdb_byte
**opcode_definitions
,
21948 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
21950 unsigned int offset_size
,
21951 struct dwarf2_section_info
*section
)
21953 unsigned int bytes_read
, i
;
21955 const gdb_byte
*defn
;
21957 if (opcode_definitions
[opcode
] == NULL
)
21959 complaint (&symfile_complaints
,
21960 _("unrecognized DW_MACFINO opcode 0x%x"),
21965 defn
= opcode_definitions
[opcode
];
21966 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
21967 defn
+= bytes_read
;
21969 for (i
= 0; i
< arg
; ++i
)
21971 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
,
21972 (enum dwarf_form
) defn
[i
], offset_size
,
21974 if (mac_ptr
== NULL
)
21976 /* skip_form_bytes already issued the complaint. */
21984 /* A helper function which parses the header of a macro section.
21985 If the macro section is the extended (for now called "GNU") type,
21986 then this updates *OFFSET_SIZE. Returns a pointer to just after
21987 the header, or issues a complaint and returns NULL on error. */
21989 static const gdb_byte
*
21990 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
21992 const gdb_byte
*mac_ptr
,
21993 unsigned int *offset_size
,
21994 int section_is_gnu
)
21996 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
21998 if (section_is_gnu
)
22000 unsigned int version
, flags
;
22002 version
= read_2_bytes (abfd
, mac_ptr
);
22003 if (version
!= 4 && version
!= 5)
22005 complaint (&symfile_complaints
,
22006 _("unrecognized version `%d' in .debug_macro section"),
22012 flags
= read_1_byte (abfd
, mac_ptr
);
22014 *offset_size
= (flags
& 1) ? 8 : 4;
22016 if ((flags
& 2) != 0)
22017 /* We don't need the line table offset. */
22018 mac_ptr
+= *offset_size
;
22020 /* Vendor opcode descriptions. */
22021 if ((flags
& 4) != 0)
22023 unsigned int i
, count
;
22025 count
= read_1_byte (abfd
, mac_ptr
);
22027 for (i
= 0; i
< count
; ++i
)
22029 unsigned int opcode
, bytes_read
;
22032 opcode
= read_1_byte (abfd
, mac_ptr
);
22034 opcode_definitions
[opcode
] = mac_ptr
;
22035 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22036 mac_ptr
+= bytes_read
;
22045 /* A helper for dwarf_decode_macros that handles the GNU extensions,
22046 including DW_MACRO_import. */
22049 dwarf_decode_macro_bytes (bfd
*abfd
,
22050 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
22051 struct macro_source_file
*current_file
,
22052 struct line_header
*lh
,
22053 struct dwarf2_section_info
*section
,
22054 int section_is_gnu
, int section_is_dwz
,
22055 unsigned int offset_size
,
22056 htab_t include_hash
)
22058 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22059 enum dwarf_macro_record_type macinfo_type
;
22060 int at_commandline
;
22061 const gdb_byte
*opcode_definitions
[256];
22063 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
22064 &offset_size
, section_is_gnu
);
22065 if (mac_ptr
== NULL
)
22067 /* We already issued a complaint. */
22071 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
22072 GDB is still reading the definitions from command line. First
22073 DW_MACINFO_start_file will need to be ignored as it was already executed
22074 to create CURRENT_FILE for the main source holding also the command line
22075 definitions. On first met DW_MACINFO_start_file this flag is reset to
22076 normally execute all the remaining DW_MACINFO_start_file macinfos. */
22078 at_commandline
= 1;
22082 /* Do we at least have room for a macinfo type byte? */
22083 if (mac_ptr
>= mac_end
)
22085 dwarf2_section_buffer_overflow_complaint (section
);
22089 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
22092 /* Note that we rely on the fact that the corresponding GNU and
22093 DWARF constants are the same. */
22094 switch (macinfo_type
)
22096 /* A zero macinfo type indicates the end of the macro
22101 case DW_MACRO_define
:
22102 case DW_MACRO_undef
:
22103 case DW_MACRO_define_strp
:
22104 case DW_MACRO_undef_strp
:
22105 case DW_MACRO_define_sup
:
22106 case DW_MACRO_undef_sup
:
22108 unsigned int bytes_read
;
22113 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22114 mac_ptr
+= bytes_read
;
22116 if (macinfo_type
== DW_MACRO_define
22117 || macinfo_type
== DW_MACRO_undef
)
22119 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
22120 mac_ptr
+= bytes_read
;
22124 LONGEST str_offset
;
22126 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
22127 mac_ptr
+= offset_size
;
22129 if (macinfo_type
== DW_MACRO_define_sup
22130 || macinfo_type
== DW_MACRO_undef_sup
22133 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
22135 body
= read_indirect_string_from_dwz (dwz
, str_offset
);
22138 body
= read_indirect_string_at_offset (abfd
, str_offset
);
22141 is_define
= (macinfo_type
== DW_MACRO_define
22142 || macinfo_type
== DW_MACRO_define_strp
22143 || macinfo_type
== DW_MACRO_define_sup
);
22144 if (! current_file
)
22146 /* DWARF violation as no main source is present. */
22147 complaint (&symfile_complaints
,
22148 _("debug info with no main source gives macro %s "
22150 is_define
? _("definition") : _("undefinition"),
22154 if ((line
== 0 && !at_commandline
)
22155 || (line
!= 0 && at_commandline
))
22156 complaint (&symfile_complaints
,
22157 _("debug info gives %s macro %s with %s line %d: %s"),
22158 at_commandline
? _("command-line") : _("in-file"),
22159 is_define
? _("definition") : _("undefinition"),
22160 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
22163 parse_macro_definition (current_file
, line
, body
);
22166 gdb_assert (macinfo_type
== DW_MACRO_undef
22167 || macinfo_type
== DW_MACRO_undef_strp
22168 || macinfo_type
== DW_MACRO_undef_sup
);
22169 macro_undef (current_file
, line
, body
);
22174 case DW_MACRO_start_file
:
22176 unsigned int bytes_read
;
22179 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22180 mac_ptr
+= bytes_read
;
22181 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22182 mac_ptr
+= bytes_read
;
22184 if ((line
== 0 && !at_commandline
)
22185 || (line
!= 0 && at_commandline
))
22186 complaint (&symfile_complaints
,
22187 _("debug info gives source %d included "
22188 "from %s at %s line %d"),
22189 file
, at_commandline
? _("command-line") : _("file"),
22190 line
== 0 ? _("zero") : _("non-zero"), line
);
22192 if (at_commandline
)
22194 /* This DW_MACRO_start_file was executed in the
22196 at_commandline
= 0;
22199 current_file
= macro_start_file (file
, line
, current_file
, lh
);
22203 case DW_MACRO_end_file
:
22204 if (! current_file
)
22205 complaint (&symfile_complaints
,
22206 _("macro debug info has an unmatched "
22207 "`close_file' directive"));
22210 current_file
= current_file
->included_by
;
22211 if (! current_file
)
22213 enum dwarf_macro_record_type next_type
;
22215 /* GCC circa March 2002 doesn't produce the zero
22216 type byte marking the end of the compilation
22217 unit. Complain if it's not there, but exit no
22220 /* Do we at least have room for a macinfo type byte? */
22221 if (mac_ptr
>= mac_end
)
22223 dwarf2_section_buffer_overflow_complaint (section
);
22227 /* We don't increment mac_ptr here, so this is just
22230 = (enum dwarf_macro_record_type
) read_1_byte (abfd
,
22232 if (next_type
!= 0)
22233 complaint (&symfile_complaints
,
22234 _("no terminating 0-type entry for "
22235 "macros in `.debug_macinfo' section"));
22242 case DW_MACRO_import
:
22243 case DW_MACRO_import_sup
:
22247 bfd
*include_bfd
= abfd
;
22248 struct dwarf2_section_info
*include_section
= section
;
22249 const gdb_byte
*include_mac_end
= mac_end
;
22250 int is_dwz
= section_is_dwz
;
22251 const gdb_byte
*new_mac_ptr
;
22253 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
22254 mac_ptr
+= offset_size
;
22256 if (macinfo_type
== DW_MACRO_import_sup
)
22258 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
22260 dwarf2_read_section (objfile
, &dwz
->macro
);
22262 include_section
= &dwz
->macro
;
22263 include_bfd
= get_section_bfd_owner (include_section
);
22264 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
22268 new_mac_ptr
= include_section
->buffer
+ offset
;
22269 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
22273 /* This has actually happened; see
22274 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
22275 complaint (&symfile_complaints
,
22276 _("recursive DW_MACRO_import in "
22277 ".debug_macro section"));
22281 *slot
= (void *) new_mac_ptr
;
22283 dwarf_decode_macro_bytes (include_bfd
, new_mac_ptr
,
22284 include_mac_end
, current_file
, lh
,
22285 section
, section_is_gnu
, is_dwz
,
22286 offset_size
, include_hash
);
22288 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
22293 case DW_MACINFO_vendor_ext
:
22294 if (!section_is_gnu
)
22296 unsigned int bytes_read
;
22298 /* This reads the constant, but since we don't recognize
22299 any vendor extensions, we ignore it. */
22300 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22301 mac_ptr
+= bytes_read
;
22302 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
22303 mac_ptr
+= bytes_read
;
22305 /* We don't recognize any vendor extensions. */
22311 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
22312 mac_ptr
, mac_end
, abfd
, offset_size
,
22314 if (mac_ptr
== NULL
)
22318 } while (macinfo_type
!= 0);
22322 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
22323 int section_is_gnu
)
22325 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22326 struct line_header
*lh
= cu
->line_header
;
22328 const gdb_byte
*mac_ptr
, *mac_end
;
22329 struct macro_source_file
*current_file
= 0;
22330 enum dwarf_macro_record_type macinfo_type
;
22331 unsigned int offset_size
= cu
->header
.offset_size
;
22332 const gdb_byte
*opcode_definitions
[256];
22333 struct cleanup
*cleanup
;
22335 struct dwarf2_section_info
*section
;
22336 const char *section_name
;
22338 if (cu
->dwo_unit
!= NULL
)
22340 if (section_is_gnu
)
22342 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
22343 section_name
= ".debug_macro.dwo";
22347 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
22348 section_name
= ".debug_macinfo.dwo";
22353 if (section_is_gnu
)
22355 section
= &dwarf2_per_objfile
->macro
;
22356 section_name
= ".debug_macro";
22360 section
= &dwarf2_per_objfile
->macinfo
;
22361 section_name
= ".debug_macinfo";
22365 dwarf2_read_section (objfile
, section
);
22366 if (section
->buffer
== NULL
)
22368 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
22371 abfd
= get_section_bfd_owner (section
);
22373 /* First pass: Find the name of the base filename.
22374 This filename is needed in order to process all macros whose definition
22375 (or undefinition) comes from the command line. These macros are defined
22376 before the first DW_MACINFO_start_file entry, and yet still need to be
22377 associated to the base file.
22379 To determine the base file name, we scan the macro definitions until we
22380 reach the first DW_MACINFO_start_file entry. We then initialize
22381 CURRENT_FILE accordingly so that any macro definition found before the
22382 first DW_MACINFO_start_file can still be associated to the base file. */
22384 mac_ptr
= section
->buffer
+ offset
;
22385 mac_end
= section
->buffer
+ section
->size
;
22387 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
22388 &offset_size
, section_is_gnu
);
22389 if (mac_ptr
== NULL
)
22391 /* We already issued a complaint. */
22397 /* Do we at least have room for a macinfo type byte? */
22398 if (mac_ptr
>= mac_end
)
22400 /* Complaint is printed during the second pass as GDB will probably
22401 stop the first pass earlier upon finding
22402 DW_MACINFO_start_file. */
22406 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
22409 /* Note that we rely on the fact that the corresponding GNU and
22410 DWARF constants are the same. */
22411 switch (macinfo_type
)
22413 /* A zero macinfo type indicates the end of the macro
22418 case DW_MACRO_define
:
22419 case DW_MACRO_undef
:
22420 /* Only skip the data by MAC_PTR. */
22422 unsigned int bytes_read
;
22424 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22425 mac_ptr
+= bytes_read
;
22426 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
22427 mac_ptr
+= bytes_read
;
22431 case DW_MACRO_start_file
:
22433 unsigned int bytes_read
;
22436 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22437 mac_ptr
+= bytes_read
;
22438 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22439 mac_ptr
+= bytes_read
;
22441 current_file
= macro_start_file (file
, line
, current_file
, lh
);
22445 case DW_MACRO_end_file
:
22446 /* No data to skip by MAC_PTR. */
22449 case DW_MACRO_define_strp
:
22450 case DW_MACRO_undef_strp
:
22451 case DW_MACRO_define_sup
:
22452 case DW_MACRO_undef_sup
:
22454 unsigned int bytes_read
;
22456 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22457 mac_ptr
+= bytes_read
;
22458 mac_ptr
+= offset_size
;
22462 case DW_MACRO_import
:
22463 case DW_MACRO_import_sup
:
22464 /* Note that, according to the spec, a transparent include
22465 chain cannot call DW_MACRO_start_file. So, we can just
22466 skip this opcode. */
22467 mac_ptr
+= offset_size
;
22470 case DW_MACINFO_vendor_ext
:
22471 /* Only skip the data by MAC_PTR. */
22472 if (!section_is_gnu
)
22474 unsigned int bytes_read
;
22476 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22477 mac_ptr
+= bytes_read
;
22478 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
22479 mac_ptr
+= bytes_read
;
22484 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
22485 mac_ptr
, mac_end
, abfd
, offset_size
,
22487 if (mac_ptr
== NULL
)
22491 } while (macinfo_type
!= 0 && current_file
== NULL
);
22493 /* Second pass: Process all entries.
22495 Use the AT_COMMAND_LINE flag to determine whether we are still processing
22496 command-line macro definitions/undefinitions. This flag is unset when we
22497 reach the first DW_MACINFO_start_file entry. */
22499 htab_up
include_hash (htab_create_alloc (1, htab_hash_pointer
,
22501 NULL
, xcalloc
, xfree
));
22502 mac_ptr
= section
->buffer
+ offset
;
22503 slot
= htab_find_slot (include_hash
.get (), mac_ptr
, INSERT
);
22504 *slot
= (void *) mac_ptr
;
22505 dwarf_decode_macro_bytes (abfd
, mac_ptr
, mac_end
,
22506 current_file
, lh
, section
,
22507 section_is_gnu
, 0, offset_size
,
22508 include_hash
.get ());
22511 /* Check if the attribute's form is a DW_FORM_block*
22512 if so return true else false. */
22515 attr_form_is_block (const struct attribute
*attr
)
22517 return (attr
== NULL
? 0 :
22518 attr
->form
== DW_FORM_block1
22519 || attr
->form
== DW_FORM_block2
22520 || attr
->form
== DW_FORM_block4
22521 || attr
->form
== DW_FORM_block
22522 || attr
->form
== DW_FORM_exprloc
);
22525 /* Return non-zero if ATTR's value is a section offset --- classes
22526 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
22527 You may use DW_UNSND (attr) to retrieve such offsets.
22529 Section 7.5.4, "Attribute Encodings", explains that no attribute
22530 may have a value that belongs to more than one of these classes; it
22531 would be ambiguous if we did, because we use the same forms for all
22535 attr_form_is_section_offset (const struct attribute
*attr
)
22537 return (attr
->form
== DW_FORM_data4
22538 || attr
->form
== DW_FORM_data8
22539 || attr
->form
== DW_FORM_sec_offset
);
22542 /* Return non-zero if ATTR's value falls in the 'constant' class, or
22543 zero otherwise. When this function returns true, you can apply
22544 dwarf2_get_attr_constant_value to it.
22546 However, note that for some attributes you must check
22547 attr_form_is_section_offset before using this test. DW_FORM_data4
22548 and DW_FORM_data8 are members of both the constant class, and of
22549 the classes that contain offsets into other debug sections
22550 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
22551 that, if an attribute's can be either a constant or one of the
22552 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
22553 taken as section offsets, not constants.
22555 DW_FORM_data16 is not considered as dwarf2_get_attr_constant_value
22556 cannot handle that. */
22559 attr_form_is_constant (const struct attribute
*attr
)
22561 switch (attr
->form
)
22563 case DW_FORM_sdata
:
22564 case DW_FORM_udata
:
22565 case DW_FORM_data1
:
22566 case DW_FORM_data2
:
22567 case DW_FORM_data4
:
22568 case DW_FORM_data8
:
22569 case DW_FORM_implicit_const
:
22577 /* DW_ADDR is always stored already as sect_offset; despite for the forms
22578 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
22581 attr_form_is_ref (const struct attribute
*attr
)
22583 switch (attr
->form
)
22585 case DW_FORM_ref_addr
:
22590 case DW_FORM_ref_udata
:
22591 case DW_FORM_GNU_ref_alt
:
22598 /* Return the .debug_loc section to use for CU.
22599 For DWO files use .debug_loc.dwo. */
22601 static struct dwarf2_section_info
*
22602 cu_debug_loc_section (struct dwarf2_cu
*cu
)
22606 struct dwo_sections
*sections
= &cu
->dwo_unit
->dwo_file
->sections
;
22608 return cu
->header
.version
>= 5 ? §ions
->loclists
: §ions
->loc
;
22610 return (cu
->header
.version
>= 5 ? &dwarf2_per_objfile
->loclists
22611 : &dwarf2_per_objfile
->loc
);
22614 /* A helper function that fills in a dwarf2_loclist_baton. */
22617 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
22618 struct dwarf2_loclist_baton
*baton
,
22619 const struct attribute
*attr
)
22621 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
22623 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
22625 baton
->per_cu
= cu
->per_cu
;
22626 gdb_assert (baton
->per_cu
);
22627 /* We don't know how long the location list is, but make sure we
22628 don't run off the edge of the section. */
22629 baton
->size
= section
->size
- DW_UNSND (attr
);
22630 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
22631 baton
->base_address
= cu
->base_address
;
22632 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
22636 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
22637 struct dwarf2_cu
*cu
, int is_block
)
22639 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22640 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
22642 if (attr_form_is_section_offset (attr
)
22643 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
22644 the section. If so, fall through to the complaint in the
22646 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
22648 struct dwarf2_loclist_baton
*baton
;
22650 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
22652 fill_in_loclist_baton (cu
, baton
, attr
);
22654 if (cu
->base_known
== 0)
22655 complaint (&symfile_complaints
,
22656 _("Location list used without "
22657 "specifying the CU base address."));
22659 SYMBOL_ACLASS_INDEX (sym
) = (is_block
22660 ? dwarf2_loclist_block_index
22661 : dwarf2_loclist_index
);
22662 SYMBOL_LOCATION_BATON (sym
) = baton
;
22666 struct dwarf2_locexpr_baton
*baton
;
22668 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
22669 baton
->per_cu
= cu
->per_cu
;
22670 gdb_assert (baton
->per_cu
);
22672 if (attr_form_is_block (attr
))
22674 /* Note that we're just copying the block's data pointer
22675 here, not the actual data. We're still pointing into the
22676 info_buffer for SYM's objfile; right now we never release
22677 that buffer, but when we do clean up properly this may
22679 baton
->size
= DW_BLOCK (attr
)->size
;
22680 baton
->data
= DW_BLOCK (attr
)->data
;
22684 dwarf2_invalid_attrib_class_complaint ("location description",
22685 SYMBOL_NATURAL_NAME (sym
));
22689 SYMBOL_ACLASS_INDEX (sym
) = (is_block
22690 ? dwarf2_locexpr_block_index
22691 : dwarf2_locexpr_index
);
22692 SYMBOL_LOCATION_BATON (sym
) = baton
;
22696 /* Return the OBJFILE associated with the compilation unit CU. If CU
22697 came from a separate debuginfo file, then the master objfile is
22701 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
22703 struct objfile
*objfile
= per_cu
->objfile
;
22705 /* Return the master objfile, so that we can report and look up the
22706 correct file containing this variable. */
22707 if (objfile
->separate_debug_objfile_backlink
)
22708 objfile
= objfile
->separate_debug_objfile_backlink
;
22713 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
22714 (CU_HEADERP is unused in such case) or prepare a temporary copy at
22715 CU_HEADERP first. */
22717 static const struct comp_unit_head
*
22718 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
22719 struct dwarf2_per_cu_data
*per_cu
)
22721 const gdb_byte
*info_ptr
;
22724 return &per_cu
->cu
->header
;
22726 info_ptr
= per_cu
->section
->buffer
+ to_underlying (per_cu
->sect_off
);
22728 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
22729 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->section
,
22730 rcuh_kind::COMPILE
);
22735 /* Return the address size given in the compilation unit header for CU. */
22738 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
22740 struct comp_unit_head cu_header_local
;
22741 const struct comp_unit_head
*cu_headerp
;
22743 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
22745 return cu_headerp
->addr_size
;
22748 /* Return the offset size given in the compilation unit header for CU. */
22751 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
22753 struct comp_unit_head cu_header_local
;
22754 const struct comp_unit_head
*cu_headerp
;
22756 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
22758 return cu_headerp
->offset_size
;
22761 /* See its dwarf2loc.h declaration. */
22764 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
22766 struct comp_unit_head cu_header_local
;
22767 const struct comp_unit_head
*cu_headerp
;
22769 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
22771 if (cu_headerp
->version
== 2)
22772 return cu_headerp
->addr_size
;
22774 return cu_headerp
->offset_size
;
22777 /* Return the text offset of the CU. The returned offset comes from
22778 this CU's objfile. If this objfile came from a separate debuginfo
22779 file, then the offset may be different from the corresponding
22780 offset in the parent objfile. */
22783 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
22785 struct objfile
*objfile
= per_cu
->objfile
;
22787 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
22790 /* Return DWARF version number of PER_CU. */
22793 dwarf2_version (struct dwarf2_per_cu_data
*per_cu
)
22795 return per_cu
->dwarf_version
;
22798 /* Locate the .debug_info compilation unit from CU's objfile which contains
22799 the DIE at OFFSET. Raises an error on failure. */
22801 static struct dwarf2_per_cu_data
*
22802 dwarf2_find_containing_comp_unit (sect_offset sect_off
,
22803 unsigned int offset_in_dwz
,
22804 struct objfile
*objfile
)
22806 struct dwarf2_per_cu_data
*this_cu
;
22808 const sect_offset
*cu_off
;
22811 high
= dwarf2_per_objfile
->n_comp_units
- 1;
22814 struct dwarf2_per_cu_data
*mid_cu
;
22815 int mid
= low
+ (high
- low
) / 2;
22817 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
22818 cu_off
= &mid_cu
->sect_off
;
22819 if (mid_cu
->is_dwz
> offset_in_dwz
22820 || (mid_cu
->is_dwz
== offset_in_dwz
&& *cu_off
>= sect_off
))
22825 gdb_assert (low
== high
);
22826 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
22827 cu_off
= &this_cu
->sect_off
;
22828 if (this_cu
->is_dwz
!= offset_in_dwz
|| *cu_off
> sect_off
)
22830 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
22831 error (_("Dwarf Error: could not find partial DIE containing "
22832 "offset 0x%x [in module %s]"),
22833 to_underlying (sect_off
), bfd_get_filename (objfile
->obfd
));
22835 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->sect_off
22837 return dwarf2_per_objfile
->all_comp_units
[low
-1];
22841 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
22842 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
22843 && sect_off
>= this_cu
->sect_off
+ this_cu
->length
)
22844 error (_("invalid dwarf2 offset %u"), to_underlying (sect_off
));
22845 gdb_assert (sect_off
< this_cu
->sect_off
+ this_cu
->length
);
22850 /* Initialize dwarf2_cu CU, owned by PER_CU. */
22853 init_one_comp_unit (struct dwarf2_cu
*cu
, struct dwarf2_per_cu_data
*per_cu
)
22855 memset (cu
, 0, sizeof (*cu
));
22857 cu
->per_cu
= per_cu
;
22858 cu
->objfile
= per_cu
->objfile
;
22859 obstack_init (&cu
->comp_unit_obstack
);
22862 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
22865 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
22866 enum language pretend_language
)
22868 struct attribute
*attr
;
22870 /* Set the language we're debugging. */
22871 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
22873 set_cu_language (DW_UNSND (attr
), cu
);
22876 cu
->language
= pretend_language
;
22877 cu
->language_defn
= language_def (cu
->language
);
22880 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
22883 /* Release one cached compilation unit, CU. We unlink it from the tree
22884 of compilation units, but we don't remove it from the read_in_chain;
22885 the caller is responsible for that.
22886 NOTE: DATA is a void * because this function is also used as a
22887 cleanup routine. */
22890 free_heap_comp_unit (void *data
)
22892 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) data
;
22894 gdb_assert (cu
->per_cu
!= NULL
);
22895 cu
->per_cu
->cu
= NULL
;
22898 obstack_free (&cu
->comp_unit_obstack
, NULL
);
22903 /* This cleanup function is passed the address of a dwarf2_cu on the stack
22904 when we're finished with it. We can't free the pointer itself, but be
22905 sure to unlink it from the cache. Also release any associated storage. */
22908 free_stack_comp_unit (void *data
)
22910 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) data
;
22912 gdb_assert (cu
->per_cu
!= NULL
);
22913 cu
->per_cu
->cu
= NULL
;
22916 obstack_free (&cu
->comp_unit_obstack
, NULL
);
22917 cu
->partial_dies
= NULL
;
22920 /* Free all cached compilation units. */
22923 free_cached_comp_units (void *data
)
22925 dwarf2_per_objfile
->free_cached_comp_units ();
22928 /* Increase the age counter on each cached compilation unit, and free
22929 any that are too old. */
22932 age_cached_comp_units (void)
22934 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22936 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
22937 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22938 while (per_cu
!= NULL
)
22940 per_cu
->cu
->last_used
++;
22941 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
22942 dwarf2_mark (per_cu
->cu
);
22943 per_cu
= per_cu
->cu
->read_in_chain
;
22946 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22947 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22948 while (per_cu
!= NULL
)
22950 struct dwarf2_per_cu_data
*next_cu
;
22952 next_cu
= per_cu
->cu
->read_in_chain
;
22954 if (!per_cu
->cu
->mark
)
22956 free_heap_comp_unit (per_cu
->cu
);
22957 *last_chain
= next_cu
;
22960 last_chain
= &per_cu
->cu
->read_in_chain
;
22966 /* Remove a single compilation unit from the cache. */
22969 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
22971 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22973 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22974 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22975 while (per_cu
!= NULL
)
22977 struct dwarf2_per_cu_data
*next_cu
;
22979 next_cu
= per_cu
->cu
->read_in_chain
;
22981 if (per_cu
== target_per_cu
)
22983 free_heap_comp_unit (per_cu
->cu
);
22985 *last_chain
= next_cu
;
22989 last_chain
= &per_cu
->cu
->read_in_chain
;
22995 /* Release all extra memory associated with OBJFILE. */
22998 dwarf2_free_objfile (struct objfile
*objfile
)
23001 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
23002 dwarf2_objfile_data_key
);
23004 if (dwarf2_per_objfile
== NULL
)
23007 dwarf2_per_objfile
->~dwarf2_per_objfile ();
23010 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
23011 We store these in a hash table separate from the DIEs, and preserve them
23012 when the DIEs are flushed out of cache.
23014 The CU "per_cu" pointer is needed because offset alone is not enough to
23015 uniquely identify the type. A file may have multiple .debug_types sections,
23016 or the type may come from a DWO file. Furthermore, while it's more logical
23017 to use per_cu->section+offset, with Fission the section with the data is in
23018 the DWO file but we don't know that section at the point we need it.
23019 We have to use something in dwarf2_per_cu_data (or the pointer to it)
23020 because we can enter the lookup routine, get_die_type_at_offset, from
23021 outside this file, and thus won't necessarily have PER_CU->cu.
23022 Fortunately, PER_CU is stable for the life of the objfile. */
23024 struct dwarf2_per_cu_offset_and_type
23026 const struct dwarf2_per_cu_data
*per_cu
;
23027 sect_offset sect_off
;
23031 /* Hash function for a dwarf2_per_cu_offset_and_type. */
23034 per_cu_offset_and_type_hash (const void *item
)
23036 const struct dwarf2_per_cu_offset_and_type
*ofs
23037 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
23039 return (uintptr_t) ofs
->per_cu
+ to_underlying (ofs
->sect_off
);
23042 /* Equality function for a dwarf2_per_cu_offset_and_type. */
23045 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
23047 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
23048 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
23049 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
23050 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
23052 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
23053 && ofs_lhs
->sect_off
== ofs_rhs
->sect_off
);
23056 /* Set the type associated with DIE to TYPE. Save it in CU's hash
23057 table if necessary. For convenience, return TYPE.
23059 The DIEs reading must have careful ordering to:
23060 * Not cause infite loops trying to read in DIEs as a prerequisite for
23061 reading current DIE.
23062 * Not trying to dereference contents of still incompletely read in types
23063 while reading in other DIEs.
23064 * Enable referencing still incompletely read in types just by a pointer to
23065 the type without accessing its fields.
23067 Therefore caller should follow these rules:
23068 * Try to fetch any prerequisite types we may need to build this DIE type
23069 before building the type and calling set_die_type.
23070 * After building type call set_die_type for current DIE as soon as
23071 possible before fetching more types to complete the current type.
23072 * Make the type as complete as possible before fetching more types. */
23074 static struct type
*
23075 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
23077 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
23078 struct objfile
*objfile
= cu
->objfile
;
23079 struct attribute
*attr
;
23080 struct dynamic_prop prop
;
23082 /* For Ada types, make sure that the gnat-specific data is always
23083 initialized (if not already set). There are a few types where
23084 we should not be doing so, because the type-specific area is
23085 already used to hold some other piece of info (eg: TYPE_CODE_FLT
23086 where the type-specific area is used to store the floatformat).
23087 But this is not a problem, because the gnat-specific information
23088 is actually not needed for these types. */
23089 if (need_gnat_info (cu
)
23090 && TYPE_CODE (type
) != TYPE_CODE_FUNC
23091 && TYPE_CODE (type
) != TYPE_CODE_FLT
23092 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
23093 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
23094 && TYPE_CODE (type
) != TYPE_CODE_METHOD
23095 && !HAVE_GNAT_AUX_INFO (type
))
23096 INIT_GNAT_SPECIFIC (type
);
23098 /* Read DW_AT_allocated and set in type. */
23099 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
23100 if (attr_form_is_block (attr
))
23102 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
23103 add_dyn_prop (DYN_PROP_ALLOCATED
, prop
, type
, objfile
);
23105 else if (attr
!= NULL
)
23107 complaint (&symfile_complaints
,
23108 _("DW_AT_allocated has the wrong form (%s) at DIE 0x%x"),
23109 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
23110 to_underlying (die
->sect_off
));
23113 /* Read DW_AT_associated and set in type. */
23114 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
23115 if (attr_form_is_block (attr
))
23117 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
23118 add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
, type
, objfile
);
23120 else if (attr
!= NULL
)
23122 complaint (&symfile_complaints
,
23123 _("DW_AT_associated has the wrong form (%s) at DIE 0x%x"),
23124 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
23125 to_underlying (die
->sect_off
));
23128 /* Read DW_AT_data_location and set in type. */
23129 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
23130 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
23131 add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
, type
, objfile
);
23133 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
23135 dwarf2_per_objfile
->die_type_hash
=
23136 htab_create_alloc_ex (127,
23137 per_cu_offset_and_type_hash
,
23138 per_cu_offset_and_type_eq
,
23140 &objfile
->objfile_obstack
,
23141 hashtab_obstack_allocate
,
23142 dummy_obstack_deallocate
);
23145 ofs
.per_cu
= cu
->per_cu
;
23146 ofs
.sect_off
= die
->sect_off
;
23148 slot
= (struct dwarf2_per_cu_offset_and_type
**)
23149 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
23151 complaint (&symfile_complaints
,
23152 _("A problem internal to GDB: DIE 0x%x has type already set"),
23153 to_underlying (die
->sect_off
));
23154 *slot
= XOBNEW (&objfile
->objfile_obstack
,
23155 struct dwarf2_per_cu_offset_and_type
);
23160 /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash,
23161 or return NULL if the die does not have a saved type. */
23163 static struct type
*
23164 get_die_type_at_offset (sect_offset sect_off
,
23165 struct dwarf2_per_cu_data
*per_cu
)
23167 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
23169 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
23172 ofs
.per_cu
= per_cu
;
23173 ofs
.sect_off
= sect_off
;
23174 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
23175 htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
));
23182 /* Look up the type for DIE in CU in die_type_hash,
23183 or return NULL if DIE does not have a saved type. */
23185 static struct type
*
23186 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
23188 return get_die_type_at_offset (die
->sect_off
, cu
->per_cu
);
23191 /* Add a dependence relationship from CU to REF_PER_CU. */
23194 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
23195 struct dwarf2_per_cu_data
*ref_per_cu
)
23199 if (cu
->dependencies
== NULL
)
23201 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
23202 NULL
, &cu
->comp_unit_obstack
,
23203 hashtab_obstack_allocate
,
23204 dummy_obstack_deallocate
);
23206 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
23208 *slot
= ref_per_cu
;
23211 /* Subroutine of dwarf2_mark to pass to htab_traverse.
23212 Set the mark field in every compilation unit in the
23213 cache that we must keep because we are keeping CU. */
23216 dwarf2_mark_helper (void **slot
, void *data
)
23218 struct dwarf2_per_cu_data
*per_cu
;
23220 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
23222 /* cu->dependencies references may not yet have been ever read if QUIT aborts
23223 reading of the chain. As such dependencies remain valid it is not much
23224 useful to track and undo them during QUIT cleanups. */
23225 if (per_cu
->cu
== NULL
)
23228 if (per_cu
->cu
->mark
)
23230 per_cu
->cu
->mark
= 1;
23232 if (per_cu
->cu
->dependencies
!= NULL
)
23233 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
23238 /* Set the mark field in CU and in every other compilation unit in the
23239 cache that we must keep because we are keeping CU. */
23242 dwarf2_mark (struct dwarf2_cu
*cu
)
23247 if (cu
->dependencies
!= NULL
)
23248 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
23252 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
23256 per_cu
->cu
->mark
= 0;
23257 per_cu
= per_cu
->cu
->read_in_chain
;
23261 /* Trivial hash function for partial_die_info: the hash value of a DIE
23262 is its offset in .debug_info for this objfile. */
23265 partial_die_hash (const void *item
)
23267 const struct partial_die_info
*part_die
23268 = (const struct partial_die_info
*) item
;
23270 return to_underlying (part_die
->sect_off
);
23273 /* Trivial comparison function for partial_die_info structures: two DIEs
23274 are equal if they have the same offset. */
23277 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
23279 const struct partial_die_info
*part_die_lhs
23280 = (const struct partial_die_info
*) item_lhs
;
23281 const struct partial_die_info
*part_die_rhs
23282 = (const struct partial_die_info
*) item_rhs
;
23284 return part_die_lhs
->sect_off
== part_die_rhs
->sect_off
;
23287 static struct cmd_list_element
*set_dwarf_cmdlist
;
23288 static struct cmd_list_element
*show_dwarf_cmdlist
;
23291 set_dwarf_cmd (char *args
, int from_tty
)
23293 help_list (set_dwarf_cmdlist
, "maintenance set dwarf ", all_commands
,
23298 show_dwarf_cmd (char *args
, int from_tty
)
23300 cmd_show_list (show_dwarf_cmdlist
, from_tty
, "");
23303 /* Free data associated with OBJFILE, if necessary. */
23306 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
23308 struct dwarf2_per_objfile
*data
= (struct dwarf2_per_objfile
*) d
;
23311 /* Make sure we don't accidentally use dwarf2_per_objfile while
23313 dwarf2_per_objfile
= NULL
;
23315 for (ix
= 0; ix
< data
->n_comp_units
; ++ix
)
23316 VEC_free (dwarf2_per_cu_ptr
, data
->all_comp_units
[ix
]->imported_symtabs
);
23318 for (ix
= 0; ix
< data
->n_type_units
; ++ix
)
23319 VEC_free (dwarf2_per_cu_ptr
,
23320 data
->all_type_units
[ix
]->per_cu
.imported_symtabs
);
23321 xfree (data
->all_type_units
);
23323 VEC_free (dwarf2_section_info_def
, data
->types
);
23325 if (data
->dwo_files
)
23326 free_dwo_files (data
->dwo_files
, objfile
);
23327 if (data
->dwp_file
)
23328 gdb_bfd_unref (data
->dwp_file
->dbfd
);
23330 if (data
->dwz_file
&& data
->dwz_file
->dwz_bfd
)
23331 gdb_bfd_unref (data
->dwz_file
->dwz_bfd
);
23335 /* The "save gdb-index" command. */
23337 /* In-memory buffer to prepare data to be written later to a file. */
23341 /* Copy DATA to the end of the buffer. */
23342 template<typename T
>
23343 void append_data (const T
&data
)
23345 std::copy (reinterpret_cast<const gdb_byte
*> (&data
),
23346 reinterpret_cast<const gdb_byte
*> (&data
+ 1),
23347 grow (sizeof (data
)));
23350 /* Copy CSTR (a zero-terminated string) to the end of buffer. The
23351 terminating zero is appended too. */
23352 void append_cstr0 (const char *cstr
)
23354 const size_t size
= strlen (cstr
) + 1;
23355 std::copy (cstr
, cstr
+ size
, grow (size
));
23358 /* Accept a host-format integer in VAL and append it to the buffer
23359 as a target-format integer which is LEN bytes long. */
23360 void append_uint (size_t len
, bfd_endian byte_order
, ULONGEST val
)
23362 ::store_unsigned_integer (grow (len
), len
, byte_order
, val
);
23365 /* Return the size of the buffer. */
23366 size_t size () const
23368 return m_vec
.size ();
23371 /* Write the buffer to FILE. */
23372 void file_write (FILE *file
) const
23374 if (::fwrite (m_vec
.data (), 1, m_vec
.size (), file
) != m_vec
.size ())
23375 error (_("couldn't write data to file"));
23379 /* Grow SIZE bytes at the end of the buffer. Returns a pointer to
23380 the start of the new block. */
23381 gdb_byte
*grow (size_t size
)
23383 m_vec
.resize (m_vec
.size () + size
);
23384 return &*m_vec
.end () - size
;
23387 gdb::byte_vector m_vec
;
23390 /* An entry in the symbol table. */
23391 struct symtab_index_entry
23393 /* The name of the symbol. */
23395 /* The offset of the name in the constant pool. */
23396 offset_type index_offset
;
23397 /* A sorted vector of the indices of all the CUs that hold an object
23399 std::vector
<offset_type
> cu_indices
;
23402 /* The symbol table. This is a power-of-2-sized hash table. */
23403 struct mapped_symtab
23407 data
.resize (1024);
23410 offset_type n_elements
= 0;
23411 std::vector
<symtab_index_entry
> data
;
23414 /* Find a slot in SYMTAB for the symbol NAME. Returns a reference to
23417 Function is used only during write_hash_table so no index format backward
23418 compatibility is needed. */
23420 static symtab_index_entry
&
23421 find_slot (struct mapped_symtab
*symtab
, const char *name
)
23423 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
23425 index
= hash
& (symtab
->data
.size () - 1);
23426 step
= ((hash
* 17) & (symtab
->data
.size () - 1)) | 1;
23430 if (symtab
->data
[index
].name
== NULL
23431 || strcmp (name
, symtab
->data
[index
].name
) == 0)
23432 return symtab
->data
[index
];
23433 index
= (index
+ step
) & (symtab
->data
.size () - 1);
23437 /* Expand SYMTAB's hash table. */
23440 hash_expand (struct mapped_symtab
*symtab
)
23442 auto old_entries
= std::move (symtab
->data
);
23444 symtab
->data
.clear ();
23445 symtab
->data
.resize (old_entries
.size () * 2);
23447 for (auto &it
: old_entries
)
23448 if (it
.name
!= NULL
)
23450 auto &ref
= find_slot (symtab
, it
.name
);
23451 ref
= std::move (it
);
23455 /* Add an entry to SYMTAB. NAME is the name of the symbol.
23456 CU_INDEX is the index of the CU in which the symbol appears.
23457 IS_STATIC is one if the symbol is static, otherwise zero (global). */
23460 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
23461 int is_static
, gdb_index_symbol_kind kind
,
23462 offset_type cu_index
)
23464 offset_type cu_index_and_attrs
;
23466 ++symtab
->n_elements
;
23467 if (4 * symtab
->n_elements
/ 3 >= symtab
->data
.size ())
23468 hash_expand (symtab
);
23470 symtab_index_entry
&slot
= find_slot (symtab
, name
);
23471 if (slot
.name
== NULL
)
23474 /* index_offset is set later. */
23477 cu_index_and_attrs
= 0;
23478 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs
, cu_index
);
23479 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs
, is_static
);
23480 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs
, kind
);
23482 /* We don't want to record an index value twice as we want to avoid the
23484 We process all global symbols and then all static symbols
23485 (which would allow us to avoid the duplication by only having to check
23486 the last entry pushed), but a symbol could have multiple kinds in one CU.
23487 To keep things simple we don't worry about the duplication here and
23488 sort and uniqufy the list after we've processed all symbols. */
23489 slot
.cu_indices
.push_back (cu_index_and_attrs
);
23492 /* Sort and remove duplicates of all symbols' cu_indices lists. */
23495 uniquify_cu_indices (struct mapped_symtab
*symtab
)
23497 for (auto &entry
: symtab
->data
)
23499 if (entry
.name
!= NULL
&& !entry
.cu_indices
.empty ())
23501 auto &cu_indices
= entry
.cu_indices
;
23502 std::sort (cu_indices
.begin (), cu_indices
.end ());
23503 auto from
= std::unique (cu_indices
.begin (), cu_indices
.end ());
23504 cu_indices
.erase (from
, cu_indices
.end ());
23509 /* A form of 'const char *' suitable for container keys. Only the
23510 pointer is stored. The strings themselves are compared, not the
23515 c_str_view (const char *cstr
)
23519 bool operator== (const c_str_view
&other
) const
23521 return strcmp (m_cstr
, other
.m_cstr
) == 0;
23525 friend class c_str_view_hasher
;
23526 const char *const m_cstr
;
23529 /* A std::unordered_map::hasher for c_str_view that uses the right
23530 hash function for strings in a mapped index. */
23531 class c_str_view_hasher
23534 size_t operator () (const c_str_view
&x
) const
23536 return mapped_index_string_hash (INT_MAX
, x
.m_cstr
);
23540 /* A std::unordered_map::hasher for std::vector<>. */
23541 template<typename T
>
23542 class vector_hasher
23545 size_t operator () (const std::vector
<T
> &key
) const
23547 return iterative_hash (key
.data (),
23548 sizeof (key
.front ()) * key
.size (), 0);
23552 /* Write the mapped hash table SYMTAB to the data buffer OUTPUT, with
23553 constant pool entries going into the data buffer CPOOL. */
23556 write_hash_table (mapped_symtab
*symtab
, data_buf
&output
, data_buf
&cpool
)
23559 /* Elements are sorted vectors of the indices of all the CUs that
23560 hold an object of this name. */
23561 std::unordered_map
<std::vector
<offset_type
>, offset_type
,
23562 vector_hasher
<offset_type
>>
23565 /* We add all the index vectors to the constant pool first, to
23566 ensure alignment is ok. */
23567 for (symtab_index_entry
&entry
: symtab
->data
)
23569 if (entry
.name
== NULL
)
23571 gdb_assert (entry
.index_offset
== 0);
23573 /* Finding before inserting is faster than always trying to
23574 insert, because inserting always allocates a node, does the
23575 lookup, and then destroys the new node if another node
23576 already had the same key. C++17 try_emplace will avoid
23579 = symbol_hash_table
.find (entry
.cu_indices
);
23580 if (found
!= symbol_hash_table
.end ())
23582 entry
.index_offset
= found
->second
;
23586 symbol_hash_table
.emplace (entry
.cu_indices
, cpool
.size ());
23587 entry
.index_offset
= cpool
.size ();
23588 cpool
.append_data (MAYBE_SWAP (entry
.cu_indices
.size ()));
23589 for (const auto index
: entry
.cu_indices
)
23590 cpool
.append_data (MAYBE_SWAP (index
));
23594 /* Now write out the hash table. */
23595 std::unordered_map
<c_str_view
, offset_type
, c_str_view_hasher
> str_table
;
23596 for (const auto &entry
: symtab
->data
)
23598 offset_type str_off
, vec_off
;
23600 if (entry
.name
!= NULL
)
23602 const auto insertpair
= str_table
.emplace (entry
.name
, cpool
.size ());
23603 if (insertpair
.second
)
23604 cpool
.append_cstr0 (entry
.name
);
23605 str_off
= insertpair
.first
->second
;
23606 vec_off
= entry
.index_offset
;
23610 /* While 0 is a valid constant pool index, it is not valid
23611 to have 0 for both offsets. */
23616 output
.append_data (MAYBE_SWAP (str_off
));
23617 output
.append_data (MAYBE_SWAP (vec_off
));
23621 typedef std::unordered_map
<partial_symtab
*, unsigned int> psym_index_map
;
23623 /* Helper struct for building the address table. */
23624 struct addrmap_index_data
23626 addrmap_index_data (data_buf
&addr_vec_
, psym_index_map
&cu_index_htab_
)
23627 : addr_vec (addr_vec_
), cu_index_htab (cu_index_htab_
)
23630 struct objfile
*objfile
;
23631 data_buf
&addr_vec
;
23632 psym_index_map
&cu_index_htab
;
23634 /* Non-zero if the previous_* fields are valid.
23635 We can't write an entry until we see the next entry (since it is only then
23636 that we know the end of the entry). */
23637 int previous_valid
;
23638 /* Index of the CU in the table of all CUs in the index file. */
23639 unsigned int previous_cu_index
;
23640 /* Start address of the CU. */
23641 CORE_ADDR previous_cu_start
;
23644 /* Write an address entry to ADDR_VEC. */
23647 add_address_entry (struct objfile
*objfile
, data_buf
&addr_vec
,
23648 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
23650 CORE_ADDR baseaddr
;
23652 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
23654 addr_vec
.append_uint (8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
23655 addr_vec
.append_uint (8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
23656 addr_vec
.append_data (MAYBE_SWAP (cu_index
));
23659 /* Worker function for traversing an addrmap to build the address table. */
23662 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
23664 struct addrmap_index_data
*data
= (struct addrmap_index_data
*) datap
;
23665 struct partial_symtab
*pst
= (struct partial_symtab
*) obj
;
23667 if (data
->previous_valid
)
23668 add_address_entry (data
->objfile
, data
->addr_vec
,
23669 data
->previous_cu_start
, start_addr
,
23670 data
->previous_cu_index
);
23672 data
->previous_cu_start
= start_addr
;
23675 const auto it
= data
->cu_index_htab
.find (pst
);
23676 gdb_assert (it
!= data
->cu_index_htab
.cend ());
23677 data
->previous_cu_index
= it
->second
;
23678 data
->previous_valid
= 1;
23681 data
->previous_valid
= 0;
23686 /* Write OBJFILE's address map to ADDR_VEC.
23687 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
23688 in the index file. */
23691 write_address_map (struct objfile
*objfile
, data_buf
&addr_vec
,
23692 psym_index_map
&cu_index_htab
)
23694 struct addrmap_index_data
addrmap_index_data (addr_vec
, cu_index_htab
);
23696 /* When writing the address table, we have to cope with the fact that
23697 the addrmap iterator only provides the start of a region; we have to
23698 wait until the next invocation to get the start of the next region. */
23700 addrmap_index_data
.objfile
= objfile
;
23701 addrmap_index_data
.previous_valid
= 0;
23703 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
23704 &addrmap_index_data
);
23706 /* It's highly unlikely the last entry (end address = 0xff...ff)
23707 is valid, but we should still handle it.
23708 The end address is recorded as the start of the next region, but that
23709 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
23711 if (addrmap_index_data
.previous_valid
)
23712 add_address_entry (objfile
, addr_vec
,
23713 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
23714 addrmap_index_data
.previous_cu_index
);
23717 /* Return the symbol kind of PSYM. */
23719 static gdb_index_symbol_kind
23720 symbol_kind (struct partial_symbol
*psym
)
23722 domain_enum domain
= PSYMBOL_DOMAIN (psym
);
23723 enum address_class aclass
= PSYMBOL_CLASS (psym
);
23731 return GDB_INDEX_SYMBOL_KIND_FUNCTION
;
23733 return GDB_INDEX_SYMBOL_KIND_TYPE
;
23735 case LOC_CONST_BYTES
:
23736 case LOC_OPTIMIZED_OUT
:
23738 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
23740 /* Note: It's currently impossible to recognize psyms as enum values
23741 short of reading the type info. For now punt. */
23742 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
23744 /* There are other LOC_FOO values that one might want to classify
23745 as variables, but dwarf2read.c doesn't currently use them. */
23746 return GDB_INDEX_SYMBOL_KIND_OTHER
;
23748 case STRUCT_DOMAIN
:
23749 return GDB_INDEX_SYMBOL_KIND_TYPE
;
23751 return GDB_INDEX_SYMBOL_KIND_OTHER
;
23755 /* Add a list of partial symbols to SYMTAB. */
23758 write_psymbols (struct mapped_symtab
*symtab
,
23759 std::unordered_set
<partial_symbol
*> &psyms_seen
,
23760 struct partial_symbol
**psymp
,
23762 offset_type cu_index
,
23765 for (; count
-- > 0; ++psymp
)
23767 struct partial_symbol
*psym
= *psymp
;
23769 if (SYMBOL_LANGUAGE (psym
) == language_ada
)
23770 error (_("Ada is not currently supported by the index"));
23772 /* Only add a given psymbol once. */
23773 if (psyms_seen
.insert (psym
).second
)
23775 gdb_index_symbol_kind kind
= symbol_kind (psym
);
23777 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (psym
),
23778 is_static
, kind
, cu_index
);
23783 /* A helper struct used when iterating over debug_types. */
23784 struct signatured_type_index_data
23786 signatured_type_index_data (data_buf
&types_list_
,
23787 std::unordered_set
<partial_symbol
*> &psyms_seen_
)
23788 : types_list (types_list_
), psyms_seen (psyms_seen_
)
23791 struct objfile
*objfile
;
23792 struct mapped_symtab
*symtab
;
23793 data_buf
&types_list
;
23794 std::unordered_set
<partial_symbol
*> &psyms_seen
;
23798 /* A helper function that writes a single signatured_type to an
23802 write_one_signatured_type (void **slot
, void *d
)
23804 struct signatured_type_index_data
*info
23805 = (struct signatured_type_index_data
*) d
;
23806 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
23807 struct partial_symtab
*psymtab
= entry
->per_cu
.v
.psymtab
;
23809 write_psymbols (info
->symtab
,
23811 info
->objfile
->global_psymbols
.list
23812 + psymtab
->globals_offset
,
23813 psymtab
->n_global_syms
, info
->cu_index
,
23815 write_psymbols (info
->symtab
,
23817 info
->objfile
->static_psymbols
.list
23818 + psymtab
->statics_offset
,
23819 psymtab
->n_static_syms
, info
->cu_index
,
23822 info
->types_list
.append_uint (8, BFD_ENDIAN_LITTLE
,
23823 to_underlying (entry
->per_cu
.sect_off
));
23824 info
->types_list
.append_uint (8, BFD_ENDIAN_LITTLE
,
23825 to_underlying (entry
->type_offset_in_tu
));
23826 info
->types_list
.append_uint (8, BFD_ENDIAN_LITTLE
, entry
->signature
);
23833 /* Recurse into all "included" dependencies and count their symbols as
23834 if they appeared in this psymtab. */
23837 recursively_count_psymbols (struct partial_symtab
*psymtab
,
23838 size_t &psyms_seen
)
23840 for (int i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
23841 if (psymtab
->dependencies
[i
]->user
!= NULL
)
23842 recursively_count_psymbols (psymtab
->dependencies
[i
],
23845 psyms_seen
+= psymtab
->n_global_syms
;
23846 psyms_seen
+= psymtab
->n_static_syms
;
23849 /* Recurse into all "included" dependencies and write their symbols as
23850 if they appeared in this psymtab. */
23853 recursively_write_psymbols (struct objfile
*objfile
,
23854 struct partial_symtab
*psymtab
,
23855 struct mapped_symtab
*symtab
,
23856 std::unordered_set
<partial_symbol
*> &psyms_seen
,
23857 offset_type cu_index
)
23861 for (i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
23862 if (psymtab
->dependencies
[i
]->user
!= NULL
)
23863 recursively_write_psymbols (objfile
, psymtab
->dependencies
[i
],
23864 symtab
, psyms_seen
, cu_index
);
23866 write_psymbols (symtab
,
23868 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
23869 psymtab
->n_global_syms
, cu_index
,
23871 write_psymbols (symtab
,
23873 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
23874 psymtab
->n_static_syms
, cu_index
,
23878 /* Create an index file for OBJFILE in the directory DIR. */
23881 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
23883 if (dwarf2_per_objfile
->using_index
)
23884 error (_("Cannot use an index to create the index"));
23886 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
23887 error (_("Cannot make an index when the file has multiple .debug_types sections"));
23889 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
23893 if (stat (objfile_name (objfile
), &st
) < 0)
23894 perror_with_name (objfile_name (objfile
));
23896 std::string
filename (std::string (dir
) + SLASH_STRING
23897 + lbasename (objfile_name (objfile
)) + INDEX_SUFFIX
);
23899 FILE *out_file
= gdb_fopen_cloexec (filename
.c_str (), "wb").release ();
23901 error (_("Can't open `%s' for writing"), filename
.c_str ());
23903 /* Order matters here; we want FILE to be closed before FILENAME is
23904 unlinked, because on MS-Windows one cannot delete a file that is
23905 still open. (Don't call anything here that might throw until
23906 file_closer is created.) */
23907 gdb::unlinker
unlink_file (filename
.c_str ());
23908 gdb_file_up
close_out_file (out_file
);
23910 mapped_symtab symtab
;
23913 /* While we're scanning CU's create a table that maps a psymtab pointer
23914 (which is what addrmap records) to its index (which is what is recorded
23915 in the index file). This will later be needed to write the address
23917 psym_index_map cu_index_htab
;
23918 cu_index_htab
.reserve (dwarf2_per_objfile
->n_comp_units
);
23920 /* The CU list is already sorted, so we don't need to do additional
23921 work here. Also, the debug_types entries do not appear in
23922 all_comp_units, but only in their own hash table. */
23924 /* The psyms_seen set is potentially going to be largish (~40k
23925 elements when indexing a -g3 build of GDB itself). Estimate the
23926 number of elements in order to avoid too many rehashes, which
23927 require rebuilding buckets and thus many trips to
23929 size_t psyms_count
= 0;
23930 for (int i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
23932 struct dwarf2_per_cu_data
*per_cu
23933 = dwarf2_per_objfile
->all_comp_units
[i
];
23934 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
23936 if (psymtab
!= NULL
&& psymtab
->user
== NULL
)
23937 recursively_count_psymbols (psymtab
, psyms_count
);
23939 /* Generating an index for gdb itself shows a ratio of
23940 TOTAL_SEEN_SYMS/UNIQUE_SYMS or ~5. 4 seems like a good bet. */
23941 std::unordered_set
<partial_symbol
*> psyms_seen (psyms_count
/ 4);
23942 for (int i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
23944 struct dwarf2_per_cu_data
*per_cu
23945 = dwarf2_per_objfile
->all_comp_units
[i
];
23946 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
23948 /* CU of a shared file from 'dwz -m' may be unused by this main file.
23949 It may be referenced from a local scope but in such case it does not
23950 need to be present in .gdb_index. */
23951 if (psymtab
== NULL
)
23954 if (psymtab
->user
== NULL
)
23955 recursively_write_psymbols (objfile
, psymtab
, &symtab
,
23958 const auto insertpair
= cu_index_htab
.emplace (psymtab
, i
);
23959 gdb_assert (insertpair
.second
);
23961 cu_list
.append_uint (8, BFD_ENDIAN_LITTLE
,
23962 to_underlying (per_cu
->sect_off
));
23963 cu_list
.append_uint (8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
23966 /* Dump the address map. */
23968 write_address_map (objfile
, addr_vec
, cu_index_htab
);
23970 /* Write out the .debug_type entries, if any. */
23971 data_buf types_cu_list
;
23972 if (dwarf2_per_objfile
->signatured_types
)
23974 signatured_type_index_data
sig_data (types_cu_list
,
23977 sig_data
.objfile
= objfile
;
23978 sig_data
.symtab
= &symtab
;
23979 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
23980 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
23981 write_one_signatured_type
, &sig_data
);
23984 /* Now that we've processed all symbols we can shrink their cu_indices
23986 uniquify_cu_indices (&symtab
);
23988 data_buf symtab_vec
, constant_pool
;
23989 write_hash_table (&symtab
, symtab_vec
, constant_pool
);
23992 const offset_type size_of_contents
= 6 * sizeof (offset_type
);
23993 offset_type total_len
= size_of_contents
;
23995 /* The version number. */
23996 contents
.append_data (MAYBE_SWAP (8));
23998 /* The offset of the CU list from the start of the file. */
23999 contents
.append_data (MAYBE_SWAP (total_len
));
24000 total_len
+= cu_list
.size ();
24002 /* The offset of the types CU list from the start of the file. */
24003 contents
.append_data (MAYBE_SWAP (total_len
));
24004 total_len
+= types_cu_list
.size ();
24006 /* The offset of the address table from the start of the file. */
24007 contents
.append_data (MAYBE_SWAP (total_len
));
24008 total_len
+= addr_vec
.size ();
24010 /* The offset of the symbol table from the start of the file. */
24011 contents
.append_data (MAYBE_SWAP (total_len
));
24012 total_len
+= symtab_vec
.size ();
24014 /* The offset of the constant pool from the start of the file. */
24015 contents
.append_data (MAYBE_SWAP (total_len
));
24016 total_len
+= constant_pool
.size ();
24018 gdb_assert (contents
.size () == size_of_contents
);
24020 contents
.file_write (out_file
);
24021 cu_list
.file_write (out_file
);
24022 types_cu_list
.file_write (out_file
);
24023 addr_vec
.file_write (out_file
);
24024 symtab_vec
.file_write (out_file
);
24025 constant_pool
.file_write (out_file
);
24027 /* We want to keep the file. */
24028 unlink_file
.keep ();
24031 /* Implementation of the `save gdb-index' command.
24033 Note that the file format used by this command is documented in the
24034 GDB manual. Any changes here must be documented there. */
24037 save_gdb_index_command (const char *arg
, int from_tty
)
24039 struct objfile
*objfile
;
24042 error (_("usage: save gdb-index DIRECTORY"));
24044 ALL_OBJFILES (objfile
)
24048 /* If the objfile does not correspond to an actual file, skip it. */
24049 if (stat (objfile_name (objfile
), &st
) < 0)
24053 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
24054 dwarf2_objfile_data_key
);
24055 if (dwarf2_per_objfile
)
24060 write_psymtabs_to_index (objfile
, arg
);
24062 CATCH (except
, RETURN_MASK_ERROR
)
24064 exception_fprintf (gdb_stderr
, except
,
24065 _("Error while writing index for `%s': "),
24066 objfile_name (objfile
));
24075 int dwarf_always_disassemble
;
24078 show_dwarf_always_disassemble (struct ui_file
*file
, int from_tty
,
24079 struct cmd_list_element
*c
, const char *value
)
24081 fprintf_filtered (file
,
24082 _("Whether to always disassemble "
24083 "DWARF expressions is %s.\n"),
24088 show_check_physname (struct ui_file
*file
, int from_tty
,
24089 struct cmd_list_element
*c
, const char *value
)
24091 fprintf_filtered (file
,
24092 _("Whether to check \"physname\" is %s.\n"),
24097 _initialize_dwarf2_read (void)
24099 struct cmd_list_element
*c
;
24101 dwarf2_objfile_data_key
24102 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
24104 add_prefix_cmd ("dwarf", class_maintenance
, set_dwarf_cmd
, _("\
24105 Set DWARF specific variables.\n\
24106 Configure DWARF variables such as the cache size"),
24107 &set_dwarf_cmdlist
, "maintenance set dwarf ",
24108 0/*allow-unknown*/, &maintenance_set_cmdlist
);
24110 add_prefix_cmd ("dwarf", class_maintenance
, show_dwarf_cmd
, _("\
24111 Show DWARF specific variables\n\
24112 Show DWARF variables such as the cache size"),
24113 &show_dwarf_cmdlist
, "maintenance show dwarf ",
24114 0/*allow-unknown*/, &maintenance_show_cmdlist
);
24116 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
24117 &dwarf_max_cache_age
, _("\
24118 Set the upper bound on the age of cached DWARF compilation units."), _("\
24119 Show the upper bound on the age of cached DWARF compilation units."), _("\
24120 A higher limit means that cached compilation units will be stored\n\
24121 in memory longer, and more total memory will be used. Zero disables\n\
24122 caching, which can slow down startup."),
24124 show_dwarf_max_cache_age
,
24125 &set_dwarf_cmdlist
,
24126 &show_dwarf_cmdlist
);
24128 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
24129 &dwarf_always_disassemble
, _("\
24130 Set whether `info address' always disassembles DWARF expressions."), _("\
24131 Show whether `info address' always disassembles DWARF expressions."), _("\
24132 When enabled, DWARF expressions are always printed in an assembly-like\n\
24133 syntax. When disabled, expressions will be printed in a more\n\
24134 conversational style, when possible."),
24136 show_dwarf_always_disassemble
,
24137 &set_dwarf_cmdlist
,
24138 &show_dwarf_cmdlist
);
24140 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
24141 Set debugging of the DWARF reader."), _("\
24142 Show debugging of the DWARF reader."), _("\
24143 When enabled (non-zero), debugging messages are printed during DWARF\n\
24144 reading and symtab expansion. A value of 1 (one) provides basic\n\
24145 information. A value greater than 1 provides more verbose information."),
24148 &setdebuglist
, &showdebuglist
);
24150 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
24151 Set debugging of the DWARF DIE reader."), _("\
24152 Show debugging of the DWARF DIE reader."), _("\
24153 When enabled (non-zero), DIEs are dumped after they are read in.\n\
24154 The value is the maximum depth to print."),
24157 &setdebuglist
, &showdebuglist
);
24159 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
24160 Set debugging of the dwarf line reader."), _("\
24161 Show debugging of the dwarf line reader."), _("\
24162 When enabled (non-zero), line number entries are dumped as they are read in.\n\
24163 A value of 1 (one) provides basic information.\n\
24164 A value greater than 1 provides more verbose information."),
24167 &setdebuglist
, &showdebuglist
);
24169 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
24170 Set cross-checking of \"physname\" code against demangler."), _("\
24171 Show cross-checking of \"physname\" code against demangler."), _("\
24172 When enabled, GDB's internal \"physname\" code is checked against\n\
24174 NULL
, show_check_physname
,
24175 &setdebuglist
, &showdebuglist
);
24177 add_setshow_boolean_cmd ("use-deprecated-index-sections",
24178 no_class
, &use_deprecated_index_sections
, _("\
24179 Set whether to use deprecated gdb_index sections."), _("\
24180 Show whether to use deprecated gdb_index sections."), _("\
24181 When enabled, deprecated .gdb_index sections are used anyway.\n\
24182 Normally they are ignored either because of a missing feature or\n\
24183 performance issue.\n\
24184 Warning: This option must be enabled before gdb reads the file."),
24187 &setlist
, &showlist
);
24189 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
24191 Save a gdb-index file.\n\
24192 Usage: save gdb-index DIRECTORY"),
24194 set_cmd_completer (c
, filename_completer
);
24196 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
24197 &dwarf2_locexpr_funcs
);
24198 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
24199 &dwarf2_loclist_funcs
);
24201 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
24202 &dwarf2_block_frame_base_locexpr_funcs
);
24203 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
24204 &dwarf2_block_frame_base_loclist_funcs
);