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)
2689 const char *filename
;
2690 struct dwz_file
*result
;
2691 bfd_size_type buildid_len_arg
;
2695 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2696 return dwarf2_per_objfile
->dwz_file
;
2698 bfd_set_error (bfd_error_no_error
);
2699 gdb::unique_xmalloc_ptr
<char> data
2700 (bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2701 &buildid_len_arg
, &buildid
));
2704 if (bfd_get_error () == bfd_error_no_error
)
2706 error (_("could not read '.gnu_debugaltlink' section: %s"),
2707 bfd_errmsg (bfd_get_error ()));
2710 gdb::unique_xmalloc_ptr
<bfd_byte
> buildid_holder (buildid
);
2712 buildid_len
= (size_t) buildid_len_arg
;
2714 filename
= data
.get ();
2716 std::string abs_storage
;
2717 if (!IS_ABSOLUTE_PATH (filename
))
2719 gdb::unique_xmalloc_ptr
<char> abs
2720 = gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2722 abs_storage
= ldirname (abs
.get ()) + SLASH_STRING
+ filename
;
2723 filename
= abs_storage
.c_str ();
2726 /* First try the file name given in the section. If that doesn't
2727 work, try to use the build-id instead. */
2728 gdb_bfd_ref_ptr
dwz_bfd (gdb_bfd_open (filename
, gnutarget
, -1));
2729 if (dwz_bfd
!= NULL
)
2731 if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2735 if (dwz_bfd
== NULL
)
2736 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2738 if (dwz_bfd
== NULL
)
2739 error (_("could not find '.gnu_debugaltlink' file for %s"),
2740 objfile_name (dwarf2_per_objfile
->objfile
));
2742 result
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
2744 result
->dwz_bfd
= dwz_bfd
.release ();
2746 bfd_map_over_sections (result
->dwz_bfd
, locate_dwz_sections
, result
);
2748 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, result
->dwz_bfd
);
2749 dwarf2_per_objfile
->dwz_file
= result
;
2753 /* DWARF quick_symbols_functions support. */
2755 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2756 unique line tables, so we maintain a separate table of all .debug_line
2757 derived entries to support the sharing.
2758 All the quick functions need is the list of file names. We discard the
2759 line_header when we're done and don't need to record it here. */
2760 struct quick_file_names
2762 /* The data used to construct the hash key. */
2763 struct stmt_list_hash hash
;
2765 /* The number of entries in file_names, real_names. */
2766 unsigned int num_file_names
;
2768 /* The file names from the line table, after being run through
2770 const char **file_names
;
2772 /* The file names from the line table after being run through
2773 gdb_realpath. These are computed lazily. */
2774 const char **real_names
;
2777 /* When using the index (and thus not using psymtabs), each CU has an
2778 object of this type. This is used to hold information needed by
2779 the various "quick" methods. */
2780 struct dwarf2_per_cu_quick_data
2782 /* The file table. This can be NULL if there was no file table
2783 or it's currently not read in.
2784 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2785 struct quick_file_names
*file_names
;
2787 /* The corresponding symbol table. This is NULL if symbols for this
2788 CU have not yet been read. */
2789 struct compunit_symtab
*compunit_symtab
;
2791 /* A temporary mark bit used when iterating over all CUs in
2792 expand_symtabs_matching. */
2793 unsigned int mark
: 1;
2795 /* True if we've tried to read the file table and found there isn't one.
2796 There will be no point in trying to read it again next time. */
2797 unsigned int no_file_data
: 1;
2800 /* Utility hash function for a stmt_list_hash. */
2803 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2807 if (stmt_list_hash
->dwo_unit
!= NULL
)
2808 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2809 v
+= to_underlying (stmt_list_hash
->line_sect_off
);
2813 /* Utility equality function for a stmt_list_hash. */
2816 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2817 const struct stmt_list_hash
*rhs
)
2819 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2821 if (lhs
->dwo_unit
!= NULL
2822 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2825 return lhs
->line_sect_off
== rhs
->line_sect_off
;
2828 /* Hash function for a quick_file_names. */
2831 hash_file_name_entry (const void *e
)
2833 const struct quick_file_names
*file_data
2834 = (const struct quick_file_names
*) e
;
2836 return hash_stmt_list_entry (&file_data
->hash
);
2839 /* Equality function for a quick_file_names. */
2842 eq_file_name_entry (const void *a
, const void *b
)
2844 const struct quick_file_names
*ea
= (const struct quick_file_names
*) a
;
2845 const struct quick_file_names
*eb
= (const struct quick_file_names
*) b
;
2847 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2850 /* Delete function for a quick_file_names. */
2853 delete_file_name_entry (void *e
)
2855 struct quick_file_names
*file_data
= (struct quick_file_names
*) e
;
2858 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2860 xfree ((void*) file_data
->file_names
[i
]);
2861 if (file_data
->real_names
)
2862 xfree ((void*) file_data
->real_names
[i
]);
2865 /* The space for the struct itself lives on objfile_obstack,
2866 so we don't free it here. */
2869 /* Create a quick_file_names hash table. */
2872 create_quick_file_names_table (unsigned int nr_initial_entries
)
2874 return htab_create_alloc (nr_initial_entries
,
2875 hash_file_name_entry
, eq_file_name_entry
,
2876 delete_file_name_entry
, xcalloc
, xfree
);
2879 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2880 have to be created afterwards. You should call age_cached_comp_units after
2881 processing PER_CU->CU. dw2_setup must have been already called. */
2884 load_cu (struct dwarf2_per_cu_data
*per_cu
)
2886 if (per_cu
->is_debug_types
)
2887 load_full_type_unit (per_cu
);
2889 load_full_comp_unit (per_cu
, language_minimal
);
2891 if (per_cu
->cu
== NULL
)
2892 return; /* Dummy CU. */
2894 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2897 /* Read in the symbols for PER_CU. */
2900 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2902 struct cleanup
*back_to
;
2904 /* Skip type_unit_groups, reading the type units they contain
2905 is handled elsewhere. */
2906 if (IS_TYPE_UNIT_GROUP (per_cu
))
2909 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
2911 if (dwarf2_per_objfile
->using_index
2912 ? per_cu
->v
.quick
->compunit_symtab
== NULL
2913 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2915 queue_comp_unit (per_cu
, language_minimal
);
2918 /* If we just loaded a CU from a DWO, and we're working with an index
2919 that may badly handle TUs, load all the TUs in that DWO as well.
2920 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2921 if (!per_cu
->is_debug_types
2922 && per_cu
->cu
!= NULL
2923 && per_cu
->cu
->dwo_unit
!= NULL
2924 && dwarf2_per_objfile
->index_table
!= NULL
2925 && dwarf2_per_objfile
->index_table
->version
<= 7
2926 /* DWP files aren't supported yet. */
2927 && get_dwp_file () == NULL
)
2928 queue_and_load_all_dwo_tus (per_cu
);
2933 /* Age the cache, releasing compilation units that have not
2934 been used recently. */
2935 age_cached_comp_units ();
2937 do_cleanups (back_to
);
2940 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2941 the objfile from which this CU came. Returns the resulting symbol
2944 static struct compunit_symtab
*
2945 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2947 gdb_assert (dwarf2_per_objfile
->using_index
);
2948 if (!per_cu
->v
.quick
->compunit_symtab
)
2950 struct cleanup
*back_to
= make_cleanup (free_cached_comp_units
, NULL
);
2951 scoped_restore decrementer
= increment_reading_symtab ();
2952 dw2_do_instantiate_symtab (per_cu
);
2953 process_cu_includes ();
2954 do_cleanups (back_to
);
2957 return per_cu
->v
.quick
->compunit_symtab
;
2960 /* Return the CU/TU given its index.
2962 This is intended for loops like:
2964 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2965 + dwarf2_per_objfile->n_type_units); ++i)
2967 struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i);
2973 static struct dwarf2_per_cu_data
*
2974 dw2_get_cutu (int index
)
2976 if (index
>= dwarf2_per_objfile
->n_comp_units
)
2978 index
-= dwarf2_per_objfile
->n_comp_units
;
2979 gdb_assert (index
< dwarf2_per_objfile
->n_type_units
);
2980 return &dwarf2_per_objfile
->all_type_units
[index
]->per_cu
;
2983 return dwarf2_per_objfile
->all_comp_units
[index
];
2986 /* Return the CU given its index.
2987 This differs from dw2_get_cutu in that it's for when you know INDEX
2990 static struct dwarf2_per_cu_data
*
2991 dw2_get_cu (int index
)
2993 gdb_assert (index
>= 0 && index
< dwarf2_per_objfile
->n_comp_units
);
2995 return dwarf2_per_objfile
->all_comp_units
[index
];
2998 /* A helper for create_cus_from_index that handles a given list of
3002 create_cus_from_index_list (struct objfile
*objfile
,
3003 const gdb_byte
*cu_list
, offset_type n_elements
,
3004 struct dwarf2_section_info
*section
,
3010 for (i
= 0; i
< n_elements
; i
+= 2)
3012 gdb_static_assert (sizeof (ULONGEST
) >= 8);
3014 sect_offset sect_off
3015 = (sect_offset
) extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
3016 ULONGEST length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
3019 dwarf2_per_cu_data
*the_cu
3020 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3021 struct dwarf2_per_cu_data
);
3022 the_cu
->sect_off
= sect_off
;
3023 the_cu
->length
= length
;
3024 the_cu
->objfile
= objfile
;
3025 the_cu
->section
= section
;
3026 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3027 struct dwarf2_per_cu_quick_data
);
3028 the_cu
->is_dwz
= is_dwz
;
3029 dwarf2_per_objfile
->all_comp_units
[base_offset
+ i
/ 2] = the_cu
;
3033 /* Read the CU list from the mapped index, and use it to create all
3034 the CU objects for this objfile. */
3037 create_cus_from_index (struct objfile
*objfile
,
3038 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
3039 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
3041 struct dwz_file
*dwz
;
3043 dwarf2_per_objfile
->n_comp_units
= (cu_list_elements
+ dwz_elements
) / 2;
3044 dwarf2_per_objfile
->all_comp_units
=
3045 XOBNEWVEC (&objfile
->objfile_obstack
, struct dwarf2_per_cu_data
*,
3046 dwarf2_per_objfile
->n_comp_units
);
3048 create_cus_from_index_list (objfile
, cu_list
, cu_list_elements
,
3049 &dwarf2_per_objfile
->info
, 0, 0);
3051 if (dwz_elements
== 0)
3054 dwz
= dwarf2_get_dwz_file ();
3055 create_cus_from_index_list (objfile
, dwz_list
, dwz_elements
, &dwz
->info
, 1,
3056 cu_list_elements
/ 2);
3059 /* Create the signatured type hash table from the index. */
3062 create_signatured_type_table_from_index (struct objfile
*objfile
,
3063 struct dwarf2_section_info
*section
,
3064 const gdb_byte
*bytes
,
3065 offset_type elements
)
3068 htab_t sig_types_hash
;
3070 dwarf2_per_objfile
->n_type_units
3071 = dwarf2_per_objfile
->n_allocated_type_units
3073 dwarf2_per_objfile
->all_type_units
=
3074 XNEWVEC (struct signatured_type
*, dwarf2_per_objfile
->n_type_units
);
3076 sig_types_hash
= allocate_signatured_type_table (objfile
);
3078 for (i
= 0; i
< elements
; i
+= 3)
3080 struct signatured_type
*sig_type
;
3083 cu_offset type_offset_in_tu
;
3085 gdb_static_assert (sizeof (ULONGEST
) >= 8);
3086 sect_offset sect_off
3087 = (sect_offset
) extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
3089 = (cu_offset
) extract_unsigned_integer (bytes
+ 8, 8,
3091 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
3094 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3095 struct signatured_type
);
3096 sig_type
->signature
= signature
;
3097 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
3098 sig_type
->per_cu
.is_debug_types
= 1;
3099 sig_type
->per_cu
.section
= section
;
3100 sig_type
->per_cu
.sect_off
= sect_off
;
3101 sig_type
->per_cu
.objfile
= objfile
;
3102 sig_type
->per_cu
.v
.quick
3103 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3104 struct dwarf2_per_cu_quick_data
);
3106 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
3109 dwarf2_per_objfile
->all_type_units
[i
/ 3] = sig_type
;
3112 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
3115 /* Read the address map data from the mapped index, and use it to
3116 populate the objfile's psymtabs_addrmap. */
3119 create_addrmap_from_index (struct objfile
*objfile
, struct mapped_index
*index
)
3121 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3122 const gdb_byte
*iter
, *end
;
3123 struct addrmap
*mutable_map
;
3126 auto_obstack temp_obstack
;
3128 mutable_map
= addrmap_create_mutable (&temp_obstack
);
3130 iter
= index
->address_table
;
3131 end
= iter
+ index
->address_table_size
;
3133 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3137 ULONGEST hi
, lo
, cu_index
;
3138 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
3140 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
3142 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
3147 complaint (&symfile_complaints
,
3148 _(".gdb_index address table has invalid range (%s - %s)"),
3149 hex_string (lo
), hex_string (hi
));
3153 if (cu_index
>= dwarf2_per_objfile
->n_comp_units
)
3155 complaint (&symfile_complaints
,
3156 _(".gdb_index address table has invalid CU number %u"),
3157 (unsigned) cu_index
);
3161 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
);
3162 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
);
3163 addrmap_set_empty (mutable_map
, lo
, hi
- 1, dw2_get_cutu (cu_index
));
3166 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
3167 &objfile
->objfile_obstack
);
3170 /* The hash function for strings in the mapped index. This is the same as
3171 SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the
3172 implementation. This is necessary because the hash function is tied to the
3173 format of the mapped index file. The hash values do not have to match with
3176 Use INT_MAX for INDEX_VERSION if you generate the current index format. */
3179 mapped_index_string_hash (int index_version
, const void *p
)
3181 const unsigned char *str
= (const unsigned char *) p
;
3185 while ((c
= *str
++) != 0)
3187 if (index_version
>= 5)
3189 r
= r
* 67 + c
- 113;
3195 /* Find a slot in the mapped index INDEX for the object named NAME.
3196 If NAME is found, set *VEC_OUT to point to the CU vector in the
3197 constant pool and return true. If NAME cannot be found, return
3201 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
3202 offset_type
**vec_out
)
3205 offset_type slot
, step
;
3206 int (*cmp
) (const char *, const char *);
3208 gdb::unique_xmalloc_ptr
<char> without_params
;
3209 if (current_language
->la_language
== language_cplus
3210 || current_language
->la_language
== language_fortran
3211 || current_language
->la_language
== language_d
)
3213 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
3216 if (strchr (name
, '(') != NULL
)
3218 without_params
= cp_remove_params (name
);
3220 if (without_params
!= NULL
)
3221 name
= without_params
.get ();
3225 /* Index version 4 did not support case insensitive searches. But the
3226 indices for case insensitive languages are built in lowercase, therefore
3227 simulate our NAME being searched is also lowercased. */
3228 hash
= mapped_index_string_hash ((index
->version
== 4
3229 && case_sensitivity
== case_sensitive_off
3230 ? 5 : index
->version
),
3233 slot
= hash
& (index
->symbol_table_slots
- 1);
3234 step
= ((hash
* 17) & (index
->symbol_table_slots
- 1)) | 1;
3235 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
3239 /* Convert a slot number to an offset into the table. */
3240 offset_type i
= 2 * slot
;
3242 if (index
->symbol_table
[i
] == 0 && index
->symbol_table
[i
+ 1] == 0)
3245 str
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[i
]);
3246 if (!cmp (name
, str
))
3248 *vec_out
= (offset_type
*) (index
->constant_pool
3249 + MAYBE_SWAP (index
->symbol_table
[i
+ 1]));
3253 slot
= (slot
+ step
) & (index
->symbol_table_slots
- 1);
3257 /* A helper function that reads the .gdb_index from SECTION and fills
3258 in MAP. FILENAME is the name of the file containing the section;
3259 it is used for error reporting. DEPRECATED_OK is nonzero if it is
3260 ok to use deprecated sections.
3262 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
3263 out parameters that are filled in with information about the CU and
3264 TU lists in the section.
3266 Returns 1 if all went well, 0 otherwise. */
3269 read_index_from_section (struct objfile
*objfile
,
3270 const char *filename
,
3272 struct dwarf2_section_info
*section
,
3273 struct mapped_index
*map
,
3274 const gdb_byte
**cu_list
,
3275 offset_type
*cu_list_elements
,
3276 const gdb_byte
**types_list
,
3277 offset_type
*types_list_elements
)
3279 const gdb_byte
*addr
;
3280 offset_type version
;
3281 offset_type
*metadata
;
3284 if (dwarf2_section_empty_p (section
))
3287 /* Older elfutils strip versions could keep the section in the main
3288 executable while splitting it for the separate debug info file. */
3289 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
3292 dwarf2_read_section (objfile
, section
);
3294 addr
= section
->buffer
;
3295 /* Version check. */
3296 version
= MAYBE_SWAP (*(offset_type
*) addr
);
3297 /* Versions earlier than 3 emitted every copy of a psymbol. This
3298 causes the index to behave very poorly for certain requests. Version 3
3299 contained incomplete addrmap. So, it seems better to just ignore such
3303 static int warning_printed
= 0;
3304 if (!warning_printed
)
3306 warning (_("Skipping obsolete .gdb_index section in %s."),
3308 warning_printed
= 1;
3312 /* Index version 4 uses a different hash function than index version
3315 Versions earlier than 6 did not emit psymbols for inlined
3316 functions. Using these files will cause GDB not to be able to
3317 set breakpoints on inlined functions by name, so we ignore these
3318 indices unless the user has done
3319 "set use-deprecated-index-sections on". */
3320 if (version
< 6 && !deprecated_ok
)
3322 static int warning_printed
= 0;
3323 if (!warning_printed
)
3326 Skipping deprecated .gdb_index section in %s.\n\
3327 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3328 to use the section anyway."),
3330 warning_printed
= 1;
3334 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3335 of the TU (for symbols coming from TUs),
3336 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3337 Plus gold-generated indices can have duplicate entries for global symbols,
3338 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3339 These are just performance bugs, and we can't distinguish gdb-generated
3340 indices from gold-generated ones, so issue no warning here. */
3342 /* Indexes with higher version than the one supported by GDB may be no
3343 longer backward compatible. */
3347 map
->version
= version
;
3348 map
->total_size
= section
->size
;
3350 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3353 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3354 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3358 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3359 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3360 - MAYBE_SWAP (metadata
[i
]))
3364 map
->address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3365 map
->address_table_size
= (MAYBE_SWAP (metadata
[i
+ 1])
3366 - MAYBE_SWAP (metadata
[i
]));
3369 map
->symbol_table
= (offset_type
*) (addr
+ MAYBE_SWAP (metadata
[i
]));
3370 map
->symbol_table_slots
= ((MAYBE_SWAP (metadata
[i
+ 1])
3371 - MAYBE_SWAP (metadata
[i
]))
3372 / (2 * sizeof (offset_type
)));
3375 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3381 /* Read the index file. If everything went ok, initialize the "quick"
3382 elements of all the CUs and return 1. Otherwise, return 0. */
3385 dwarf2_read_index (struct objfile
*objfile
)
3387 struct mapped_index local_map
, *map
;
3388 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3389 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3390 struct dwz_file
*dwz
;
3392 if (!read_index_from_section (objfile
, objfile_name (objfile
),
3393 use_deprecated_index_sections
,
3394 &dwarf2_per_objfile
->gdb_index
, &local_map
,
3395 &cu_list
, &cu_list_elements
,
3396 &types_list
, &types_list_elements
))
3399 /* Don't use the index if it's empty. */
3400 if (local_map
.symbol_table_slots
== 0)
3403 /* If there is a .dwz file, read it so we can get its CU list as
3405 dwz
= dwarf2_get_dwz_file ();
3408 struct mapped_index dwz_map
;
3409 const gdb_byte
*dwz_types_ignore
;
3410 offset_type dwz_types_elements_ignore
;
3412 if (!read_index_from_section (objfile
, bfd_get_filename (dwz
->dwz_bfd
),
3414 &dwz
->gdb_index
, &dwz_map
,
3415 &dwz_list
, &dwz_list_elements
,
3417 &dwz_types_elements_ignore
))
3419 warning (_("could not read '.gdb_index' section from %s; skipping"),
3420 bfd_get_filename (dwz
->dwz_bfd
));
3425 create_cus_from_index (objfile
, cu_list
, cu_list_elements
, dwz_list
,
3428 if (types_list_elements
)
3430 struct dwarf2_section_info
*section
;
3432 /* We can only handle a single .debug_types when we have an
3434 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
3437 section
= VEC_index (dwarf2_section_info_def
,
3438 dwarf2_per_objfile
->types
, 0);
3440 create_signatured_type_table_from_index (objfile
, section
, types_list
,
3441 types_list_elements
);
3444 create_addrmap_from_index (objfile
, &local_map
);
3446 map
= XOBNEW (&objfile
->objfile_obstack
, struct mapped_index
);
3449 dwarf2_per_objfile
->index_table
= map
;
3450 dwarf2_per_objfile
->using_index
= 1;
3451 dwarf2_per_objfile
->quick_file_names_table
=
3452 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
3457 /* A helper for the "quick" functions which sets the global
3458 dwarf2_per_objfile according to OBJFILE. */
3461 dw2_setup (struct objfile
*objfile
)
3463 dwarf2_per_objfile
= ((struct dwarf2_per_objfile
*)
3464 objfile_data (objfile
, dwarf2_objfile_data_key
));
3465 gdb_assert (dwarf2_per_objfile
);
3468 /* die_reader_func for dw2_get_file_names. */
3471 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3472 const gdb_byte
*info_ptr
,
3473 struct die_info
*comp_unit_die
,
3477 struct dwarf2_cu
*cu
= reader
->cu
;
3478 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3479 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3480 struct dwarf2_per_cu_data
*lh_cu
;
3481 struct attribute
*attr
;
3484 struct quick_file_names
*qfn
;
3486 gdb_assert (! this_cu
->is_debug_types
);
3488 /* Our callers never want to match partial units -- instead they
3489 will match the enclosing full CU. */
3490 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3492 this_cu
->v
.quick
->no_file_data
= 1;
3500 sect_offset line_offset
{};
3502 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3505 struct quick_file_names find_entry
;
3507 line_offset
= (sect_offset
) DW_UNSND (attr
);
3509 /* We may have already read in this line header (TU line header sharing).
3510 If we have we're done. */
3511 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3512 find_entry
.hash
.line_sect_off
= line_offset
;
3513 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
3514 &find_entry
, INSERT
);
3517 lh_cu
->v
.quick
->file_names
= (struct quick_file_names
*) *slot
;
3521 lh
= dwarf_decode_line_header (line_offset
, cu
);
3525 lh_cu
->v
.quick
->no_file_data
= 1;
3529 qfn
= XOBNEW (&objfile
->objfile_obstack
, struct quick_file_names
);
3530 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3531 qfn
->hash
.line_sect_off
= line_offset
;
3532 gdb_assert (slot
!= NULL
);
3535 file_and_directory fnd
= find_file_and_directory (comp_unit_die
, cu
);
3537 qfn
->num_file_names
= lh
->file_names
.size ();
3539 XOBNEWVEC (&objfile
->objfile_obstack
, const char *, lh
->file_names
.size ());
3540 for (i
= 0; i
< lh
->file_names
.size (); ++i
)
3541 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
.get (), fnd
.comp_dir
);
3542 qfn
->real_names
= NULL
;
3544 lh_cu
->v
.quick
->file_names
= qfn
;
3547 /* A helper for the "quick" functions which attempts to read the line
3548 table for THIS_CU. */
3550 static struct quick_file_names
*
3551 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3553 /* This should never be called for TUs. */
3554 gdb_assert (! this_cu
->is_debug_types
);
3555 /* Nor type unit groups. */
3556 gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu
));
3558 if (this_cu
->v
.quick
->file_names
!= NULL
)
3559 return this_cu
->v
.quick
->file_names
;
3560 /* If we know there is no line data, no point in looking again. */
3561 if (this_cu
->v
.quick
->no_file_data
)
3564 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
3566 if (this_cu
->v
.quick
->no_file_data
)
3568 return this_cu
->v
.quick
->file_names
;
3571 /* A helper for the "quick" functions which computes and caches the
3572 real path for a given file name from the line table. */
3575 dw2_get_real_path (struct objfile
*objfile
,
3576 struct quick_file_names
*qfn
, int index
)
3578 if (qfn
->real_names
== NULL
)
3579 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
3580 qfn
->num_file_names
, const char *);
3582 if (qfn
->real_names
[index
] == NULL
)
3583 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]).release ();
3585 return qfn
->real_names
[index
];
3588 static struct symtab
*
3589 dw2_find_last_source_symtab (struct objfile
*objfile
)
3591 struct compunit_symtab
*cust
;
3594 dw2_setup (objfile
);
3595 index
= dwarf2_per_objfile
->n_comp_units
- 1;
3596 cust
= dw2_instantiate_symtab (dw2_get_cutu (index
));
3599 return compunit_primary_filetab (cust
);
3602 /* Traversal function for dw2_forget_cached_source_info. */
3605 dw2_free_cached_file_names (void **slot
, void *info
)
3607 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3609 if (file_data
->real_names
)
3613 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3615 xfree ((void*) file_data
->real_names
[i
]);
3616 file_data
->real_names
[i
] = NULL
;
3624 dw2_forget_cached_source_info (struct objfile
*objfile
)
3626 dw2_setup (objfile
);
3628 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
3629 dw2_free_cached_file_names
, NULL
);
3632 /* Helper function for dw2_map_symtabs_matching_filename that expands
3633 the symtabs and calls the iterator. */
3636 dw2_map_expand_apply (struct objfile
*objfile
,
3637 struct dwarf2_per_cu_data
*per_cu
,
3638 const char *name
, const char *real_path
,
3639 gdb::function_view
<bool (symtab
*)> callback
)
3641 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3643 /* Don't visit already-expanded CUs. */
3644 if (per_cu
->v
.quick
->compunit_symtab
)
3647 /* This may expand more than one symtab, and we want to iterate over
3649 dw2_instantiate_symtab (per_cu
);
3651 return iterate_over_some_symtabs (name
, real_path
, objfile
->compunit_symtabs
,
3652 last_made
, callback
);
3655 /* Implementation of the map_symtabs_matching_filename method. */
3658 dw2_map_symtabs_matching_filename
3659 (struct objfile
*objfile
, const char *name
, const char *real_path
,
3660 gdb::function_view
<bool (symtab
*)> callback
)
3663 const char *name_basename
= lbasename (name
);
3665 dw2_setup (objfile
);
3667 /* The rule is CUs specify all the files, including those used by
3668 any TU, so there's no need to scan TUs here. */
3670 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3673 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3674 struct quick_file_names
*file_data
;
3676 /* We only need to look at symtabs not already expanded. */
3677 if (per_cu
->v
.quick
->compunit_symtab
)
3680 file_data
= dw2_get_file_names (per_cu
);
3681 if (file_data
== NULL
)
3684 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3686 const char *this_name
= file_data
->file_names
[j
];
3687 const char *this_real_name
;
3689 if (compare_filenames_for_search (this_name
, name
))
3691 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3697 /* Before we invoke realpath, which can get expensive when many
3698 files are involved, do a quick comparison of the basenames. */
3699 if (! basenames_may_differ
3700 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3703 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3704 if (compare_filenames_for_search (this_real_name
, name
))
3706 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3712 if (real_path
!= NULL
)
3714 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3715 gdb_assert (IS_ABSOLUTE_PATH (name
));
3716 if (this_real_name
!= NULL
3717 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3719 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3731 /* Struct used to manage iterating over all CUs looking for a symbol. */
3733 struct dw2_symtab_iterator
3735 /* The internalized form of .gdb_index. */
3736 struct mapped_index
*index
;
3737 /* If non-zero, only look for symbols that match BLOCK_INDEX. */
3738 int want_specific_block
;
3739 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
3740 Unused if !WANT_SPECIFIC_BLOCK. */
3742 /* The kind of symbol we're looking for. */
3744 /* The list of CUs from the index entry of the symbol,
3745 or NULL if not found. */
3747 /* The next element in VEC to look at. */
3749 /* The number of elements in VEC, or zero if there is no match. */
3751 /* Have we seen a global version of the symbol?
3752 If so we can ignore all further global instances.
3753 This is to work around gold/15646, inefficient gold-generated
3758 /* Initialize the index symtab iterator ITER.
3759 If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols
3760 in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
3763 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3764 struct mapped_index
*index
,
3765 int want_specific_block
,
3770 iter
->index
= index
;
3771 iter
->want_specific_block
= want_specific_block
;
3772 iter
->block_index
= block_index
;
3773 iter
->domain
= domain
;
3775 iter
->global_seen
= 0;
3777 if (find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3778 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3786 /* Return the next matching CU or NULL if there are no more. */
3788 static struct dwarf2_per_cu_data
*
3789 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3791 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3793 offset_type cu_index_and_attrs
=
3794 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3795 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3796 struct dwarf2_per_cu_data
*per_cu
;
3797 int want_static
= iter
->block_index
!= GLOBAL_BLOCK
;
3798 /* This value is only valid for index versions >= 7. */
3799 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3800 gdb_index_symbol_kind symbol_kind
=
3801 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3802 /* Only check the symbol attributes if they're present.
3803 Indices prior to version 7 don't record them,
3804 and indices >= 7 may elide them for certain symbols
3805 (gold does this). */
3807 (iter
->index
->version
>= 7
3808 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3810 /* Don't crash on bad data. */
3811 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
3812 + dwarf2_per_objfile
->n_type_units
))
3814 complaint (&symfile_complaints
,
3815 _(".gdb_index entry has bad CU index"
3817 objfile_name (dwarf2_per_objfile
->objfile
));
3821 per_cu
= dw2_get_cutu (cu_index
);
3823 /* Skip if already read in. */
3824 if (per_cu
->v
.quick
->compunit_symtab
)
3827 /* Check static vs global. */
3830 if (iter
->want_specific_block
3831 && want_static
!= is_static
)
3833 /* Work around gold/15646. */
3834 if (!is_static
&& iter
->global_seen
)
3837 iter
->global_seen
= 1;
3840 /* Only check the symbol's kind if it has one. */
3843 switch (iter
->domain
)
3846 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3847 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3848 /* Some types are also in VAR_DOMAIN. */
3849 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3853 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3857 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3872 static struct compunit_symtab
*
3873 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
3874 const char *name
, domain_enum domain
)
3876 struct compunit_symtab
*stab_best
= NULL
;
3877 struct mapped_index
*index
;
3879 dw2_setup (objfile
);
3881 index
= dwarf2_per_objfile
->index_table
;
3883 /* index is NULL if OBJF_READNOW. */
3886 struct dw2_symtab_iterator iter
;
3887 struct dwarf2_per_cu_data
*per_cu
;
3889 dw2_symtab_iter_init (&iter
, index
, 1, block_index
, domain
, name
);
3891 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3893 struct symbol
*sym
, *with_opaque
= NULL
;
3894 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
);
3895 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
3896 struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
3898 sym
= block_find_symbol (block
, name
, domain
,
3899 block_find_non_opaque_type_preferred
,
3902 /* Some caution must be observed with overloaded functions
3903 and methods, since the index will not contain any overload
3904 information (but NAME might contain it). */
3907 && SYMBOL_MATCHES_SEARCH_NAME (sym
, name
))
3909 if (with_opaque
!= NULL
3910 && SYMBOL_MATCHES_SEARCH_NAME (with_opaque
, name
))
3913 /* Keep looking through other CUs. */
3921 dw2_print_stats (struct objfile
*objfile
)
3923 int i
, total
, count
;
3925 dw2_setup (objfile
);
3926 total
= dwarf2_per_objfile
->n_comp_units
+ dwarf2_per_objfile
->n_type_units
;
3928 for (i
= 0; i
< total
; ++i
)
3930 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3932 if (!per_cu
->v
.quick
->compunit_symtab
)
3935 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
3936 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3939 /* This dumps minimal information about the index.
3940 It is called via "mt print objfiles".
3941 One use is to verify .gdb_index has been loaded by the
3942 gdb.dwarf2/gdb-index.exp testcase. */
3945 dw2_dump (struct objfile
*objfile
)
3947 dw2_setup (objfile
);
3948 gdb_assert (dwarf2_per_objfile
->using_index
);
3949 printf_filtered (".gdb_index:");
3950 if (dwarf2_per_objfile
->index_table
!= NULL
)
3952 printf_filtered (" version %d\n",
3953 dwarf2_per_objfile
->index_table
->version
);
3956 printf_filtered (" faked for \"readnow\"\n");
3957 printf_filtered ("\n");
3961 dw2_relocate (struct objfile
*objfile
,
3962 const struct section_offsets
*new_offsets
,
3963 const struct section_offsets
*delta
)
3965 /* There's nothing to relocate here. */
3969 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
3970 const char *func_name
)
3972 struct mapped_index
*index
;
3974 dw2_setup (objfile
);
3976 index
= dwarf2_per_objfile
->index_table
;
3978 /* index is NULL if OBJF_READNOW. */
3981 struct dw2_symtab_iterator iter
;
3982 struct dwarf2_per_cu_data
*per_cu
;
3984 /* Note: It doesn't matter what we pass for block_index here. */
3985 dw2_symtab_iter_init (&iter
, index
, 0, GLOBAL_BLOCK
, VAR_DOMAIN
,
3988 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3989 dw2_instantiate_symtab (per_cu
);
3994 dw2_expand_all_symtabs (struct objfile
*objfile
)
3998 dw2_setup (objfile
);
4000 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
4001 + dwarf2_per_objfile
->n_type_units
); ++i
)
4003 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4005 dw2_instantiate_symtab (per_cu
);
4010 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
4011 const char *fullname
)
4015 dw2_setup (objfile
);
4017 /* We don't need to consider type units here.
4018 This is only called for examining code, e.g. expand_line_sal.
4019 There can be an order of magnitude (or more) more type units
4020 than comp units, and we avoid them if we can. */
4022 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4025 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4026 struct quick_file_names
*file_data
;
4028 /* We only need to look at symtabs not already expanded. */
4029 if (per_cu
->v
.quick
->compunit_symtab
)
4032 file_data
= dw2_get_file_names (per_cu
);
4033 if (file_data
== NULL
)
4036 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
4038 const char *this_fullname
= file_data
->file_names
[j
];
4040 if (filename_cmp (this_fullname
, fullname
) == 0)
4042 dw2_instantiate_symtab (per_cu
);
4050 dw2_map_matching_symbols (struct objfile
*objfile
,
4051 const char * name
, domain_enum domain
,
4053 int (*callback
) (struct block
*,
4054 struct symbol
*, void *),
4055 void *data
, symbol_compare_ftype
*match
,
4056 symbol_compare_ftype
*ordered_compare
)
4058 /* Currently unimplemented; used for Ada. The function can be called if the
4059 current language is Ada for a non-Ada objfile using GNU index. As Ada
4060 does not look for non-Ada symbols this function should just return. */
4064 dw2_expand_symtabs_matching
4065 (struct objfile
*objfile
,
4066 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4067 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4068 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
4069 enum search_domain kind
)
4073 struct mapped_index
*index
;
4075 dw2_setup (objfile
);
4077 /* index_table is NULL if OBJF_READNOW. */
4078 if (!dwarf2_per_objfile
->index_table
)
4080 index
= dwarf2_per_objfile
->index_table
;
4082 if (file_matcher
!= NULL
)
4084 htab_up
visited_found (htab_create_alloc (10, htab_hash_pointer
,
4086 NULL
, xcalloc
, xfree
));
4087 htab_up
visited_not_found (htab_create_alloc (10, htab_hash_pointer
,
4089 NULL
, xcalloc
, xfree
));
4091 /* The rule is CUs specify all the files, including those used by
4092 any TU, so there's no need to scan TUs here. */
4094 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4097 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
4098 struct quick_file_names
*file_data
;
4103 per_cu
->v
.quick
->mark
= 0;
4105 /* We only need to look at symtabs not already expanded. */
4106 if (per_cu
->v
.quick
->compunit_symtab
)
4109 file_data
= dw2_get_file_names (per_cu
);
4110 if (file_data
== NULL
)
4113 if (htab_find (visited_not_found
.get (), file_data
) != NULL
)
4115 else if (htab_find (visited_found
.get (), file_data
) != NULL
)
4117 per_cu
->v
.quick
->mark
= 1;
4121 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
4123 const char *this_real_name
;
4125 if (file_matcher (file_data
->file_names
[j
], false))
4127 per_cu
->v
.quick
->mark
= 1;
4131 /* Before we invoke realpath, which can get expensive when many
4132 files are involved, do a quick comparison of the basenames. */
4133 if (!basenames_may_differ
4134 && !file_matcher (lbasename (file_data
->file_names
[j
]),
4138 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
4139 if (file_matcher (this_real_name
, false))
4141 per_cu
->v
.quick
->mark
= 1;
4146 slot
= htab_find_slot (per_cu
->v
.quick
->mark
4147 ? visited_found
.get ()
4148 : visited_not_found
.get (),
4154 for (iter
= 0; iter
< index
->symbol_table_slots
; ++iter
)
4156 offset_type idx
= 2 * iter
;
4158 offset_type
*vec
, vec_len
, vec_idx
;
4159 int global_seen
= 0;
4163 if (index
->symbol_table
[idx
] == 0 && index
->symbol_table
[idx
+ 1] == 0)
4166 name
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[idx
]);
4168 if (!symbol_matcher (name
))
4171 /* The name was matched, now expand corresponding CUs that were
4173 vec
= (offset_type
*) (index
->constant_pool
4174 + MAYBE_SWAP (index
->symbol_table
[idx
+ 1]));
4175 vec_len
= MAYBE_SWAP (vec
[0]);
4176 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
4178 struct dwarf2_per_cu_data
*per_cu
;
4179 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
4180 /* This value is only valid for index versions >= 7. */
4181 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
4182 gdb_index_symbol_kind symbol_kind
=
4183 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
4184 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
4185 /* Only check the symbol attributes if they're present.
4186 Indices prior to version 7 don't record them,
4187 and indices >= 7 may elide them for certain symbols
4188 (gold does this). */
4190 (index
->version
>= 7
4191 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
4193 /* Work around gold/15646. */
4196 if (!is_static
&& global_seen
)
4202 /* Only check the symbol's kind if it has one. */
4207 case VARIABLES_DOMAIN
:
4208 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
4211 case FUNCTIONS_DOMAIN
:
4212 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
4216 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4224 /* Don't crash on bad data. */
4225 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
4226 + dwarf2_per_objfile
->n_type_units
))
4228 complaint (&symfile_complaints
,
4229 _(".gdb_index entry has bad CU index"
4230 " [in module %s]"), objfile_name (objfile
));
4234 per_cu
= dw2_get_cutu (cu_index
);
4235 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
4237 int symtab_was_null
=
4238 (per_cu
->v
.quick
->compunit_symtab
== NULL
);
4240 dw2_instantiate_symtab (per_cu
);
4242 if (expansion_notify
!= NULL
4244 && per_cu
->v
.quick
->compunit_symtab
!= NULL
)
4246 expansion_notify (per_cu
->v
.quick
->compunit_symtab
);
4253 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
4256 static struct compunit_symtab
*
4257 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
4262 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
4263 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
4266 if (cust
->includes
== NULL
)
4269 for (i
= 0; cust
->includes
[i
]; ++i
)
4271 struct compunit_symtab
*s
= cust
->includes
[i
];
4273 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
4281 static struct compunit_symtab
*
4282 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
4283 struct bound_minimal_symbol msymbol
,
4285 struct obj_section
*section
,
4288 struct dwarf2_per_cu_data
*data
;
4289 struct compunit_symtab
*result
;
4291 dw2_setup (objfile
);
4293 if (!objfile
->psymtabs_addrmap
)
4296 data
= (struct dwarf2_per_cu_data
*) addrmap_find (objfile
->psymtabs_addrmap
,
4301 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
4302 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
4303 paddress (get_objfile_arch (objfile
), pc
));
4306 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
),
4308 gdb_assert (result
!= NULL
);
4313 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
4314 void *data
, int need_fullname
)
4316 dw2_setup (objfile
);
4318 if (!dwarf2_per_objfile
->filenames_cache
)
4320 dwarf2_per_objfile
->filenames_cache
.emplace ();
4322 htab_up
visited (htab_create_alloc (10,
4323 htab_hash_pointer
, htab_eq_pointer
,
4324 NULL
, xcalloc
, xfree
));
4326 /* The rule is CUs specify all the files, including those used
4327 by any TU, so there's no need to scan TUs here. We can
4328 ignore file names coming from already-expanded CUs. */
4330 for (int i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4332 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4334 if (per_cu
->v
.quick
->compunit_symtab
)
4336 void **slot
= htab_find_slot (visited
.get (),
4337 per_cu
->v
.quick
->file_names
,
4340 *slot
= per_cu
->v
.quick
->file_names
;
4344 for (int i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4347 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
4348 struct quick_file_names
*file_data
;
4351 /* We only need to look at symtabs not already expanded. */
4352 if (per_cu
->v
.quick
->compunit_symtab
)
4355 file_data
= dw2_get_file_names (per_cu
);
4356 if (file_data
== NULL
)
4359 slot
= htab_find_slot (visited
.get (), file_data
, INSERT
);
4362 /* Already visited. */
4367 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4369 const char *filename
= file_data
->file_names
[j
];
4370 dwarf2_per_objfile
->filenames_cache
->seen (filename
);
4375 dwarf2_per_objfile
->filenames_cache
->traverse ([&] (const char *filename
)
4377 gdb::unique_xmalloc_ptr
<char> this_real_name
;
4380 this_real_name
= gdb_realpath (filename
);
4381 (*fun
) (filename
, this_real_name
.get (), data
);
4386 dw2_has_symbols (struct objfile
*objfile
)
4391 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
4394 dw2_find_last_source_symtab
,
4395 dw2_forget_cached_source_info
,
4396 dw2_map_symtabs_matching_filename
,
4401 dw2_expand_symtabs_for_function
,
4402 dw2_expand_all_symtabs
,
4403 dw2_expand_symtabs_with_fullname
,
4404 dw2_map_matching_symbols
,
4405 dw2_expand_symtabs_matching
,
4406 dw2_find_pc_sect_compunit_symtab
,
4407 dw2_map_symbol_filenames
4410 /* Initialize for reading DWARF for this objfile. Return 0 if this
4411 file will use psymtabs, or 1 if using the GNU index. */
4414 dwarf2_initialize_objfile (struct objfile
*objfile
)
4416 /* If we're about to read full symbols, don't bother with the
4417 indices. In this case we also don't care if some other debug
4418 format is making psymtabs, because they are all about to be
4420 if ((objfile
->flags
& OBJF_READNOW
))
4424 dwarf2_per_objfile
->using_index
= 1;
4425 create_all_comp_units (objfile
);
4426 create_all_type_units (objfile
);
4427 dwarf2_per_objfile
->quick_file_names_table
=
4428 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
4430 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
4431 + dwarf2_per_objfile
->n_type_units
); ++i
)
4433 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4435 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4436 struct dwarf2_per_cu_quick_data
);
4439 /* Return 1 so that gdb sees the "quick" functions. However,
4440 these functions will be no-ops because we will have expanded
4445 if (dwarf2_read_index (objfile
))
4453 /* Build a partial symbol table. */
4456 dwarf2_build_psymtabs (struct objfile
*objfile
)
4459 if (objfile
->global_psymbols
.capacity () == 0
4460 && objfile
->static_psymbols
.capacity () == 0)
4461 init_psymbol_list (objfile
, 1024);
4465 /* This isn't really ideal: all the data we allocate on the
4466 objfile's obstack is still uselessly kept around. However,
4467 freeing it seems unsafe. */
4468 psymtab_discarder
psymtabs (objfile
);
4469 dwarf2_build_psymtabs_hard (objfile
);
4472 CATCH (except
, RETURN_MASK_ERROR
)
4474 exception_print (gdb_stderr
, except
);
4479 /* Return the total length of the CU described by HEADER. */
4482 get_cu_length (const struct comp_unit_head
*header
)
4484 return header
->initial_length_size
+ header
->length
;
4487 /* Return TRUE if SECT_OFF is within CU_HEADER. */
4490 offset_in_cu_p (const comp_unit_head
*cu_header
, sect_offset sect_off
)
4492 sect_offset bottom
= cu_header
->sect_off
;
4493 sect_offset top
= cu_header
->sect_off
+ get_cu_length (cu_header
);
4495 return sect_off
>= bottom
&& sect_off
< top
;
4498 /* Find the base address of the compilation unit for range lists and
4499 location lists. It will normally be specified by DW_AT_low_pc.
4500 In DWARF-3 draft 4, the base address could be overridden by
4501 DW_AT_entry_pc. It's been removed, but GCC still uses this for
4502 compilation units with discontinuous ranges. */
4505 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
4507 struct attribute
*attr
;
4510 cu
->base_address
= 0;
4512 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
4515 cu
->base_address
= attr_value_as_address (attr
);
4520 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4523 cu
->base_address
= attr_value_as_address (attr
);
4529 /* Read in the comp unit header information from the debug_info at info_ptr.
4530 Use rcuh_kind::COMPILE as the default type if not known by the caller.
4531 NOTE: This leaves members offset, first_die_offset to be filled in
4534 static const gdb_byte
*
4535 read_comp_unit_head (struct comp_unit_head
*cu_header
,
4536 const gdb_byte
*info_ptr
,
4537 struct dwarf2_section_info
*section
,
4538 rcuh_kind section_kind
)
4541 unsigned int bytes_read
;
4542 const char *filename
= get_section_file_name (section
);
4543 bfd
*abfd
= get_section_bfd_owner (section
);
4545 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
4546 cu_header
->initial_length_size
= bytes_read
;
4547 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
4548 info_ptr
+= bytes_read
;
4549 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
4551 if (cu_header
->version
< 5)
4552 switch (section_kind
)
4554 case rcuh_kind::COMPILE
:
4555 cu_header
->unit_type
= DW_UT_compile
;
4557 case rcuh_kind::TYPE
:
4558 cu_header
->unit_type
= DW_UT_type
;
4561 internal_error (__FILE__
, __LINE__
,
4562 _("read_comp_unit_head: invalid section_kind"));
4566 cu_header
->unit_type
= static_cast<enum dwarf_unit_type
>
4567 (read_1_byte (abfd
, info_ptr
));
4569 switch (cu_header
->unit_type
)
4572 if (section_kind
!= rcuh_kind::COMPILE
)
4573 error (_("Dwarf Error: wrong unit_type in compilation unit header "
4574 "(is DW_UT_compile, should be DW_UT_type) [in module %s]"),
4578 section_kind
= rcuh_kind::TYPE
;
4581 error (_("Dwarf Error: wrong unit_type in compilation unit header "
4582 "(is %d, should be %d or %d) [in module %s]"),
4583 cu_header
->unit_type
, DW_UT_compile
, DW_UT_type
, filename
);
4586 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
4589 cu_header
->abbrev_sect_off
= (sect_offset
) read_offset (abfd
, info_ptr
,
4592 info_ptr
+= bytes_read
;
4593 if (cu_header
->version
< 5)
4595 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
4598 signed_addr
= bfd_get_sign_extend_vma (abfd
);
4599 if (signed_addr
< 0)
4600 internal_error (__FILE__
, __LINE__
,
4601 _("read_comp_unit_head: dwarf from non elf file"));
4602 cu_header
->signed_addr_p
= signed_addr
;
4604 if (section_kind
== rcuh_kind::TYPE
)
4606 LONGEST type_offset
;
4608 cu_header
->signature
= read_8_bytes (abfd
, info_ptr
);
4611 type_offset
= read_offset (abfd
, info_ptr
, cu_header
, &bytes_read
);
4612 info_ptr
+= bytes_read
;
4613 cu_header
->type_cu_offset_in_tu
= (cu_offset
) type_offset
;
4614 if (to_underlying (cu_header
->type_cu_offset_in_tu
) != type_offset
)
4615 error (_("Dwarf Error: Too big type_offset in compilation unit "
4616 "header (is %s) [in module %s]"), plongest (type_offset
),
4623 /* Helper function that returns the proper abbrev section for
4626 static struct dwarf2_section_info
*
4627 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
4629 struct dwarf2_section_info
*abbrev
;
4631 if (this_cu
->is_dwz
)
4632 abbrev
= &dwarf2_get_dwz_file ()->abbrev
;
4634 abbrev
= &dwarf2_per_objfile
->abbrev
;
4639 /* Subroutine of read_and_check_comp_unit_head and
4640 read_and_check_type_unit_head to simplify them.
4641 Perform various error checking on the header. */
4644 error_check_comp_unit_head (struct comp_unit_head
*header
,
4645 struct dwarf2_section_info
*section
,
4646 struct dwarf2_section_info
*abbrev_section
)
4648 const char *filename
= get_section_file_name (section
);
4650 if (header
->version
< 2 || header
->version
> 5)
4651 error (_("Dwarf Error: wrong version in compilation unit header "
4652 "(is %d, should be 2, 3, 4 or 5) [in module %s]"), header
->version
,
4655 if (to_underlying (header
->abbrev_sect_off
)
4656 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
4657 error (_("Dwarf Error: bad offset (0x%x) in compilation unit header "
4658 "(offset 0x%x + 6) [in module %s]"),
4659 to_underlying (header
->abbrev_sect_off
),
4660 to_underlying (header
->sect_off
),
4663 /* Cast to ULONGEST to use 64-bit arithmetic when possible to
4664 avoid potential 32-bit overflow. */
4665 if (((ULONGEST
) header
->sect_off
+ get_cu_length (header
))
4667 error (_("Dwarf Error: bad length (0x%x) in compilation unit header "
4668 "(offset 0x%x + 0) [in module %s]"),
4669 header
->length
, to_underlying (header
->sect_off
),
4673 /* Read in a CU/TU header and perform some basic error checking.
4674 The contents of the header are stored in HEADER.
4675 The result is a pointer to the start of the first DIE. */
4677 static const gdb_byte
*
4678 read_and_check_comp_unit_head (struct comp_unit_head
*header
,
4679 struct dwarf2_section_info
*section
,
4680 struct dwarf2_section_info
*abbrev_section
,
4681 const gdb_byte
*info_ptr
,
4682 rcuh_kind section_kind
)
4684 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
4685 bfd
*abfd
= get_section_bfd_owner (section
);
4687 header
->sect_off
= (sect_offset
) (beg_of_comp_unit
- section
->buffer
);
4689 info_ptr
= read_comp_unit_head (header
, info_ptr
, section
, section_kind
);
4691 header
->first_die_cu_offset
= (cu_offset
) (info_ptr
- beg_of_comp_unit
);
4693 error_check_comp_unit_head (header
, section
, abbrev_section
);
4698 /* Fetch the abbreviation table offset from a comp or type unit header. */
4701 read_abbrev_offset (struct dwarf2_section_info
*section
,
4702 sect_offset sect_off
)
4704 bfd
*abfd
= get_section_bfd_owner (section
);
4705 const gdb_byte
*info_ptr
;
4706 unsigned int initial_length_size
, offset_size
;
4709 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
4710 info_ptr
= section
->buffer
+ to_underlying (sect_off
);
4711 read_initial_length (abfd
, info_ptr
, &initial_length_size
);
4712 offset_size
= initial_length_size
== 4 ? 4 : 8;
4713 info_ptr
+= initial_length_size
;
4715 version
= read_2_bytes (abfd
, info_ptr
);
4719 /* Skip unit type and address size. */
4723 return (sect_offset
) read_offset_1 (abfd
, info_ptr
, offset_size
);
4726 /* Allocate a new partial symtab for file named NAME and mark this new
4727 partial symtab as being an include of PST. */
4730 dwarf2_create_include_psymtab (const char *name
, struct partial_symtab
*pst
,
4731 struct objfile
*objfile
)
4733 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
4735 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
4737 /* It shares objfile->objfile_obstack. */
4738 subpst
->dirname
= pst
->dirname
;
4741 subpst
->textlow
= 0;
4742 subpst
->texthigh
= 0;
4744 subpst
->dependencies
4745 = XOBNEW (&objfile
->objfile_obstack
, struct partial_symtab
*);
4746 subpst
->dependencies
[0] = pst
;
4747 subpst
->number_of_dependencies
= 1;
4749 subpst
->globals_offset
= 0;
4750 subpst
->n_global_syms
= 0;
4751 subpst
->statics_offset
= 0;
4752 subpst
->n_static_syms
= 0;
4753 subpst
->compunit_symtab
= NULL
;
4754 subpst
->read_symtab
= pst
->read_symtab
;
4757 /* No private part is necessary for include psymtabs. This property
4758 can be used to differentiate between such include psymtabs and
4759 the regular ones. */
4760 subpst
->read_symtab_private
= NULL
;
4763 /* Read the Line Number Program data and extract the list of files
4764 included by the source file represented by PST. Build an include
4765 partial symtab for each of these included files. */
4768 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
4769 struct die_info
*die
,
4770 struct partial_symtab
*pst
)
4773 struct attribute
*attr
;
4775 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
4777 lh
= dwarf_decode_line_header ((sect_offset
) DW_UNSND (attr
), cu
);
4779 return; /* No linetable, so no includes. */
4781 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
4782 dwarf_decode_lines (lh
.get (), pst
->dirname
, cu
, pst
, pst
->textlow
, 1);
4786 hash_signatured_type (const void *item
)
4788 const struct signatured_type
*sig_type
4789 = (const struct signatured_type
*) item
;
4791 /* This drops the top 32 bits of the signature, but is ok for a hash. */
4792 return sig_type
->signature
;
4796 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
4798 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
4799 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
4801 return lhs
->signature
== rhs
->signature
;
4804 /* Allocate a hash table for signatured types. */
4807 allocate_signatured_type_table (struct objfile
*objfile
)
4809 return htab_create_alloc_ex (41,
4810 hash_signatured_type
,
4813 &objfile
->objfile_obstack
,
4814 hashtab_obstack_allocate
,
4815 dummy_obstack_deallocate
);
4818 /* A helper function to add a signatured type CU to a table. */
4821 add_signatured_type_cu_to_table (void **slot
, void *datum
)
4823 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
4824 struct signatured_type
***datap
= (struct signatured_type
***) datum
;
4832 /* A helper for create_debug_types_hash_table. Read types from SECTION
4833 and fill them into TYPES_HTAB. It will process only type units,
4834 therefore DW_UT_type. */
4837 create_debug_type_hash_table (struct dwo_file
*dwo_file
,
4838 dwarf2_section_info
*section
, htab_t
&types_htab
,
4839 rcuh_kind section_kind
)
4841 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4842 struct dwarf2_section_info
*abbrev_section
;
4844 const gdb_byte
*info_ptr
, *end_ptr
;
4846 abbrev_section
= (dwo_file
!= NULL
4847 ? &dwo_file
->sections
.abbrev
4848 : &dwarf2_per_objfile
->abbrev
);
4850 if (dwarf_read_debug
)
4851 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
4852 get_section_name (section
),
4853 get_section_file_name (abbrev_section
));
4855 dwarf2_read_section (objfile
, section
);
4856 info_ptr
= section
->buffer
;
4858 if (info_ptr
== NULL
)
4861 /* We can't set abfd until now because the section may be empty or
4862 not present, in which case the bfd is unknown. */
4863 abfd
= get_section_bfd_owner (section
);
4865 /* We don't use init_cutu_and_read_dies_simple, or some such, here
4866 because we don't need to read any dies: the signature is in the
4869 end_ptr
= info_ptr
+ section
->size
;
4870 while (info_ptr
< end_ptr
)
4872 struct signatured_type
*sig_type
;
4873 struct dwo_unit
*dwo_tu
;
4875 const gdb_byte
*ptr
= info_ptr
;
4876 struct comp_unit_head header
;
4877 unsigned int length
;
4879 sect_offset sect_off
= (sect_offset
) (ptr
- section
->buffer
);
4881 /* Initialize it due to a false compiler warning. */
4882 header
.signature
= -1;
4883 header
.type_cu_offset_in_tu
= (cu_offset
) -1;
4885 /* We need to read the type's signature in order to build the hash
4886 table, but we don't need anything else just yet. */
4888 ptr
= read_and_check_comp_unit_head (&header
, section
,
4889 abbrev_section
, ptr
, section_kind
);
4891 length
= get_cu_length (&header
);
4893 /* Skip dummy type units. */
4894 if (ptr
>= info_ptr
+ length
4895 || peek_abbrev_code (abfd
, ptr
) == 0
4896 || header
.unit_type
!= DW_UT_type
)
4902 if (types_htab
== NULL
)
4905 types_htab
= allocate_dwo_unit_table (objfile
);
4907 types_htab
= allocate_signatured_type_table (objfile
);
4913 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4915 dwo_tu
->dwo_file
= dwo_file
;
4916 dwo_tu
->signature
= header
.signature
;
4917 dwo_tu
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
4918 dwo_tu
->section
= section
;
4919 dwo_tu
->sect_off
= sect_off
;
4920 dwo_tu
->length
= length
;
4924 /* N.B.: type_offset is not usable if this type uses a DWO file.
4925 The real type_offset is in the DWO file. */
4927 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4928 struct signatured_type
);
4929 sig_type
->signature
= header
.signature
;
4930 sig_type
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
4931 sig_type
->per_cu
.objfile
= objfile
;
4932 sig_type
->per_cu
.is_debug_types
= 1;
4933 sig_type
->per_cu
.section
= section
;
4934 sig_type
->per_cu
.sect_off
= sect_off
;
4935 sig_type
->per_cu
.length
= length
;
4938 slot
= htab_find_slot (types_htab
,
4939 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
4941 gdb_assert (slot
!= NULL
);
4944 sect_offset dup_sect_off
;
4948 const struct dwo_unit
*dup_tu
4949 = (const struct dwo_unit
*) *slot
;
4951 dup_sect_off
= dup_tu
->sect_off
;
4955 const struct signatured_type
*dup_tu
4956 = (const struct signatured_type
*) *slot
;
4958 dup_sect_off
= dup_tu
->per_cu
.sect_off
;
4961 complaint (&symfile_complaints
,
4962 _("debug type entry at offset 0x%x is duplicate to"
4963 " the entry at offset 0x%x, signature %s"),
4964 to_underlying (sect_off
), to_underlying (dup_sect_off
),
4965 hex_string (header
.signature
));
4967 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
4969 if (dwarf_read_debug
> 1)
4970 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature %s\n",
4971 to_underlying (sect_off
),
4972 hex_string (header
.signature
));
4978 /* Create the hash table of all entries in the .debug_types
4979 (or .debug_types.dwo) section(s).
4980 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
4981 otherwise it is NULL.
4983 The result is a pointer to the hash table or NULL if there are no types.
4985 Note: This function processes DWO files only, not DWP files. */
4988 create_debug_types_hash_table (struct dwo_file
*dwo_file
,
4989 VEC (dwarf2_section_info_def
) *types
,
4993 struct dwarf2_section_info
*section
;
4995 if (VEC_empty (dwarf2_section_info_def
, types
))
4999 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
5001 create_debug_type_hash_table (dwo_file
, section
, types_htab
,
5005 /* Create the hash table of all entries in the .debug_types section,
5006 and initialize all_type_units.
5007 The result is zero if there is an error (e.g. missing .debug_types section),
5008 otherwise non-zero. */
5011 create_all_type_units (struct objfile
*objfile
)
5013 htab_t types_htab
= NULL
;
5014 struct signatured_type
**iter
;
5016 create_debug_type_hash_table (NULL
, &dwarf2_per_objfile
->info
, types_htab
,
5017 rcuh_kind::COMPILE
);
5018 create_debug_types_hash_table (NULL
, dwarf2_per_objfile
->types
, types_htab
);
5019 if (types_htab
== NULL
)
5021 dwarf2_per_objfile
->signatured_types
= NULL
;
5025 dwarf2_per_objfile
->signatured_types
= types_htab
;
5027 dwarf2_per_objfile
->n_type_units
5028 = dwarf2_per_objfile
->n_allocated_type_units
5029 = htab_elements (types_htab
);
5030 dwarf2_per_objfile
->all_type_units
=
5031 XNEWVEC (struct signatured_type
*, dwarf2_per_objfile
->n_type_units
);
5032 iter
= &dwarf2_per_objfile
->all_type_units
[0];
5033 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
5034 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
5035 == dwarf2_per_objfile
->n_type_units
);
5040 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
5041 If SLOT is non-NULL, it is the entry to use in the hash table.
5042 Otherwise we find one. */
5044 static struct signatured_type
*
5045 add_type_unit (ULONGEST sig
, void **slot
)
5047 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5048 int n_type_units
= dwarf2_per_objfile
->n_type_units
;
5049 struct signatured_type
*sig_type
;
5051 gdb_assert (n_type_units
<= dwarf2_per_objfile
->n_allocated_type_units
);
5053 if (n_type_units
> dwarf2_per_objfile
->n_allocated_type_units
)
5055 if (dwarf2_per_objfile
->n_allocated_type_units
== 0)
5056 dwarf2_per_objfile
->n_allocated_type_units
= 1;
5057 dwarf2_per_objfile
->n_allocated_type_units
*= 2;
5058 dwarf2_per_objfile
->all_type_units
5059 = XRESIZEVEC (struct signatured_type
*,
5060 dwarf2_per_objfile
->all_type_units
,
5061 dwarf2_per_objfile
->n_allocated_type_units
);
5062 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
5064 dwarf2_per_objfile
->n_type_units
= n_type_units
;
5066 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5067 struct signatured_type
);
5068 dwarf2_per_objfile
->all_type_units
[n_type_units
- 1] = sig_type
;
5069 sig_type
->signature
= sig
;
5070 sig_type
->per_cu
.is_debug_types
= 1;
5071 if (dwarf2_per_objfile
->using_index
)
5073 sig_type
->per_cu
.v
.quick
=
5074 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5075 struct dwarf2_per_cu_quick_data
);
5080 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
5083 gdb_assert (*slot
== NULL
);
5085 /* The rest of sig_type must be filled in by the caller. */
5089 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
5090 Fill in SIG_ENTRY with DWO_ENTRY. */
5093 fill_in_sig_entry_from_dwo_entry (struct objfile
*objfile
,
5094 struct signatured_type
*sig_entry
,
5095 struct dwo_unit
*dwo_entry
)
5097 /* Make sure we're not clobbering something we don't expect to. */
5098 gdb_assert (! sig_entry
->per_cu
.queued
);
5099 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
5100 if (dwarf2_per_objfile
->using_index
)
5102 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
5103 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
5106 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
5107 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
5108 gdb_assert (to_underlying (sig_entry
->type_offset_in_section
) == 0);
5109 gdb_assert (sig_entry
->type_unit_group
== NULL
);
5110 gdb_assert (sig_entry
->dwo_unit
== NULL
);
5112 sig_entry
->per_cu
.section
= dwo_entry
->section
;
5113 sig_entry
->per_cu
.sect_off
= dwo_entry
->sect_off
;
5114 sig_entry
->per_cu
.length
= dwo_entry
->length
;
5115 sig_entry
->per_cu
.reading_dwo_directly
= 1;
5116 sig_entry
->per_cu
.objfile
= objfile
;
5117 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
5118 sig_entry
->dwo_unit
= dwo_entry
;
5121 /* Subroutine of lookup_signatured_type.
5122 If we haven't read the TU yet, create the signatured_type data structure
5123 for a TU to be read in directly from a DWO file, bypassing the stub.
5124 This is the "Stay in DWO Optimization": When there is no DWP file and we're
5125 using .gdb_index, then when reading a CU we want to stay in the DWO file
5126 containing that CU. Otherwise we could end up reading several other DWO
5127 files (due to comdat folding) to process the transitive closure of all the
5128 mentioned TUs, and that can be slow. The current DWO file will have every
5129 type signature that it needs.
5130 We only do this for .gdb_index because in the psymtab case we already have
5131 to read all the DWOs to build the type unit groups. */
5133 static struct signatured_type
*
5134 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
5136 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5137 struct dwo_file
*dwo_file
;
5138 struct dwo_unit find_dwo_entry
, *dwo_entry
;
5139 struct signatured_type find_sig_entry
, *sig_entry
;
5142 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
5144 /* If TU skeletons have been removed then we may not have read in any
5146 if (dwarf2_per_objfile
->signatured_types
== NULL
)
5148 dwarf2_per_objfile
->signatured_types
5149 = allocate_signatured_type_table (objfile
);
5152 /* We only ever need to read in one copy of a signatured type.
5153 Use the global signatured_types array to do our own comdat-folding
5154 of types. If this is the first time we're reading this TU, and
5155 the TU has an entry in .gdb_index, replace the recorded data from
5156 .gdb_index with this TU. */
5158 find_sig_entry
.signature
= sig
;
5159 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
5160 &find_sig_entry
, INSERT
);
5161 sig_entry
= (struct signatured_type
*) *slot
;
5163 /* We can get here with the TU already read, *or* in the process of being
5164 read. Don't reassign the global entry to point to this DWO if that's
5165 the case. Also note that if the TU is already being read, it may not
5166 have come from a DWO, the program may be a mix of Fission-compiled
5167 code and non-Fission-compiled code. */
5169 /* Have we already tried to read this TU?
5170 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
5171 needn't exist in the global table yet). */
5172 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
5175 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
5176 dwo_unit of the TU itself. */
5177 dwo_file
= cu
->dwo_unit
->dwo_file
;
5179 /* Ok, this is the first time we're reading this TU. */
5180 if (dwo_file
->tus
== NULL
)
5182 find_dwo_entry
.signature
= sig
;
5183 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_entry
);
5184 if (dwo_entry
== NULL
)
5187 /* If the global table doesn't have an entry for this TU, add one. */
5188 if (sig_entry
== NULL
)
5189 sig_entry
= add_type_unit (sig
, slot
);
5191 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
5192 sig_entry
->per_cu
.tu_read
= 1;
5196 /* Subroutine of lookup_signatured_type.
5197 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
5198 then try the DWP file. If the TU stub (skeleton) has been removed then
5199 it won't be in .gdb_index. */
5201 static struct signatured_type
*
5202 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
5204 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5205 struct dwp_file
*dwp_file
= get_dwp_file ();
5206 struct dwo_unit
*dwo_entry
;
5207 struct signatured_type find_sig_entry
, *sig_entry
;
5210 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
5211 gdb_assert (dwp_file
!= NULL
);
5213 /* If TU skeletons have been removed then we may not have read in any
5215 if (dwarf2_per_objfile
->signatured_types
== NULL
)
5217 dwarf2_per_objfile
->signatured_types
5218 = allocate_signatured_type_table (objfile
);
5221 find_sig_entry
.signature
= sig
;
5222 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
5223 &find_sig_entry
, INSERT
);
5224 sig_entry
= (struct signatured_type
*) *slot
;
5226 /* Have we already tried to read this TU?
5227 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
5228 needn't exist in the global table yet). */
5229 if (sig_entry
!= NULL
)
5232 if (dwp_file
->tus
== NULL
)
5234 dwo_entry
= lookup_dwo_unit_in_dwp (dwp_file
, NULL
,
5235 sig
, 1 /* is_debug_types */);
5236 if (dwo_entry
== NULL
)
5239 sig_entry
= add_type_unit (sig
, slot
);
5240 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
5245 /* Lookup a signature based type for DW_FORM_ref_sig8.
5246 Returns NULL if signature SIG is not present in the table.
5247 It is up to the caller to complain about this. */
5249 static struct signatured_type
*
5250 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
5253 && dwarf2_per_objfile
->using_index
)
5255 /* We're in a DWO/DWP file, and we're using .gdb_index.
5256 These cases require special processing. */
5257 if (get_dwp_file () == NULL
)
5258 return lookup_dwo_signatured_type (cu
, sig
);
5260 return lookup_dwp_signatured_type (cu
, sig
);
5264 struct signatured_type find_entry
, *entry
;
5266 if (dwarf2_per_objfile
->signatured_types
== NULL
)
5268 find_entry
.signature
= sig
;
5269 entry
= ((struct signatured_type
*)
5270 htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
));
5275 /* Low level DIE reading support. */
5277 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
5280 init_cu_die_reader (struct die_reader_specs
*reader
,
5281 struct dwarf2_cu
*cu
,
5282 struct dwarf2_section_info
*section
,
5283 struct dwo_file
*dwo_file
)
5285 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
5286 reader
->abfd
= get_section_bfd_owner (section
);
5288 reader
->dwo_file
= dwo_file
;
5289 reader
->die_section
= section
;
5290 reader
->buffer
= section
->buffer
;
5291 reader
->buffer_end
= section
->buffer
+ section
->size
;
5292 reader
->comp_dir
= NULL
;
5295 /* Subroutine of init_cutu_and_read_dies to simplify it.
5296 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
5297 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
5300 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
5301 from it to the DIE in the DWO. If NULL we are skipping the stub.
5302 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
5303 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
5304 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
5305 STUB_COMP_DIR may be non-NULL.
5306 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
5307 are filled in with the info of the DIE from the DWO file.
5308 ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies
5309 provided an abbrev table to use.
5310 The result is non-zero if a valid (non-dummy) DIE was found. */
5313 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
5314 struct dwo_unit
*dwo_unit
,
5315 int abbrev_table_provided
,
5316 struct die_info
*stub_comp_unit_die
,
5317 const char *stub_comp_dir
,
5318 struct die_reader_specs
*result_reader
,
5319 const gdb_byte
**result_info_ptr
,
5320 struct die_info
**result_comp_unit_die
,
5321 int *result_has_children
)
5323 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5324 struct dwarf2_cu
*cu
= this_cu
->cu
;
5325 struct dwarf2_section_info
*section
;
5327 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5328 ULONGEST signature
; /* Or dwo_id. */
5329 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
5330 int i
,num_extra_attrs
;
5331 struct dwarf2_section_info
*dwo_abbrev_section
;
5332 struct attribute
*attr
;
5333 struct die_info
*comp_unit_die
;
5335 /* At most one of these may be provided. */
5336 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
5338 /* These attributes aren't processed until later:
5339 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
5340 DW_AT_comp_dir is used now, to find the DWO file, but it is also
5341 referenced later. However, these attributes are found in the stub
5342 which we won't have later. In order to not impose this complication
5343 on the rest of the code, we read them here and copy them to the
5352 if (stub_comp_unit_die
!= NULL
)
5354 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
5356 if (! this_cu
->is_debug_types
)
5357 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
5358 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
5359 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
5360 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
5361 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
5363 /* There should be a DW_AT_addr_base attribute here (if needed).
5364 We need the value before we can process DW_FORM_GNU_addr_index. */
5366 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
5368 cu
->addr_base
= DW_UNSND (attr
);
5370 /* There should be a DW_AT_ranges_base attribute here (if needed).
5371 We need the value before we can process DW_AT_ranges. */
5372 cu
->ranges_base
= 0;
5373 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
5375 cu
->ranges_base
= DW_UNSND (attr
);
5377 else if (stub_comp_dir
!= NULL
)
5379 /* Reconstruct the comp_dir attribute to simplify the code below. */
5380 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
5381 comp_dir
->name
= DW_AT_comp_dir
;
5382 comp_dir
->form
= DW_FORM_string
;
5383 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
5384 DW_STRING (comp_dir
) = stub_comp_dir
;
5387 /* Set up for reading the DWO CU/TU. */
5388 cu
->dwo_unit
= dwo_unit
;
5389 section
= dwo_unit
->section
;
5390 dwarf2_read_section (objfile
, section
);
5391 abfd
= get_section_bfd_owner (section
);
5392 begin_info_ptr
= info_ptr
= (section
->buffer
5393 + to_underlying (dwo_unit
->sect_off
));
5394 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
5395 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
);
5397 if (this_cu
->is_debug_types
)
5399 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
5401 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5403 info_ptr
, rcuh_kind::TYPE
);
5404 /* This is not an assert because it can be caused by bad debug info. */
5405 if (sig_type
->signature
!= cu
->header
.signature
)
5407 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
5408 " TU at offset 0x%x [in module %s]"),
5409 hex_string (sig_type
->signature
),
5410 hex_string (cu
->header
.signature
),
5411 to_underlying (dwo_unit
->sect_off
),
5412 bfd_get_filename (abfd
));
5414 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
5415 /* For DWOs coming from DWP files, we don't know the CU length
5416 nor the type's offset in the TU until now. */
5417 dwo_unit
->length
= get_cu_length (&cu
->header
);
5418 dwo_unit
->type_offset_in_tu
= cu
->header
.type_cu_offset_in_tu
;
5420 /* Establish the type offset that can be used to lookup the type.
5421 For DWO files, we don't know it until now. */
5422 sig_type
->type_offset_in_section
5423 = dwo_unit
->sect_off
+ to_underlying (dwo_unit
->type_offset_in_tu
);
5427 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5429 info_ptr
, rcuh_kind::COMPILE
);
5430 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
5431 /* For DWOs coming from DWP files, we don't know the CU length
5433 dwo_unit
->length
= get_cu_length (&cu
->header
);
5436 /* Replace the CU's original abbrev table with the DWO's.
5437 Reminder: We can't read the abbrev table until we've read the header. */
5438 if (abbrev_table_provided
)
5440 /* Don't free the provided abbrev table, the caller of
5441 init_cutu_and_read_dies owns it. */
5442 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5443 /* Ensure the DWO abbrev table gets freed. */
5444 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5448 dwarf2_free_abbrev_table (cu
);
5449 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5450 /* Leave any existing abbrev table cleanup as is. */
5453 /* Read in the die, but leave space to copy over the attributes
5454 from the stub. This has the benefit of simplifying the rest of
5455 the code - all the work to maintain the illusion of a single
5456 DW_TAG_{compile,type}_unit DIE is done here. */
5457 num_extra_attrs
= ((stmt_list
!= NULL
)
5461 + (comp_dir
!= NULL
));
5462 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
5463 result_has_children
, num_extra_attrs
);
5465 /* Copy over the attributes from the stub to the DIE we just read in. */
5466 comp_unit_die
= *result_comp_unit_die
;
5467 i
= comp_unit_die
->num_attrs
;
5468 if (stmt_list
!= NULL
)
5469 comp_unit_die
->attrs
[i
++] = *stmt_list
;
5471 comp_unit_die
->attrs
[i
++] = *low_pc
;
5472 if (high_pc
!= NULL
)
5473 comp_unit_die
->attrs
[i
++] = *high_pc
;
5475 comp_unit_die
->attrs
[i
++] = *ranges
;
5476 if (comp_dir
!= NULL
)
5477 comp_unit_die
->attrs
[i
++] = *comp_dir
;
5478 comp_unit_die
->num_attrs
+= num_extra_attrs
;
5480 if (dwarf_die_debug
)
5482 fprintf_unfiltered (gdb_stdlog
,
5483 "Read die from %s@0x%x of %s:\n",
5484 get_section_name (section
),
5485 (unsigned) (begin_info_ptr
- section
->buffer
),
5486 bfd_get_filename (abfd
));
5487 dump_die (comp_unit_die
, dwarf_die_debug
);
5490 /* Save the comp_dir attribute. If there is no DWP file then we'll read
5491 TUs by skipping the stub and going directly to the entry in the DWO file.
5492 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
5493 to get it via circuitous means. Blech. */
5494 if (comp_dir
!= NULL
)
5495 result_reader
->comp_dir
= DW_STRING (comp_dir
);
5497 /* Skip dummy compilation units. */
5498 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
5499 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5502 *result_info_ptr
= info_ptr
;
5506 /* Subroutine of init_cutu_and_read_dies to simplify it.
5507 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
5508 Returns NULL if the specified DWO unit cannot be found. */
5510 static struct dwo_unit
*
5511 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
5512 struct die_info
*comp_unit_die
)
5514 struct dwarf2_cu
*cu
= this_cu
->cu
;
5515 struct attribute
*attr
;
5517 struct dwo_unit
*dwo_unit
;
5518 const char *comp_dir
, *dwo_name
;
5520 gdb_assert (cu
!= NULL
);
5522 /* Yeah, we look dwo_name up again, but it simplifies the code. */
5523 dwo_name
= dwarf2_string_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5524 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
5526 if (this_cu
->is_debug_types
)
5528 struct signatured_type
*sig_type
;
5530 /* Since this_cu is the first member of struct signatured_type,
5531 we can go from a pointer to one to a pointer to the other. */
5532 sig_type
= (struct signatured_type
*) this_cu
;
5533 signature
= sig_type
->signature
;
5534 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
5538 struct attribute
*attr
;
5540 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
5542 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
5544 dwo_name
, objfile_name (this_cu
->objfile
));
5545 signature
= DW_UNSND (attr
);
5546 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
5553 /* Subroutine of init_cutu_and_read_dies to simplify it.
5554 See it for a description of the parameters.
5555 Read a TU directly from a DWO file, bypassing the stub.
5557 Note: This function could be a little bit simpler if we shared cleanups
5558 with our caller, init_cutu_and_read_dies. That's generally a fragile thing
5559 to do, so we keep this function self-contained. Or we could move this
5560 into our caller, but it's complex enough already. */
5563 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
5564 int use_existing_cu
, int keep
,
5565 die_reader_func_ftype
*die_reader_func
,
5568 struct dwarf2_cu
*cu
;
5569 struct signatured_type
*sig_type
;
5570 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5571 struct die_reader_specs reader
;
5572 const gdb_byte
*info_ptr
;
5573 struct die_info
*comp_unit_die
;
5576 /* Verify we can do the following downcast, and that we have the
5578 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
5579 sig_type
= (struct signatured_type
*) this_cu
;
5580 gdb_assert (sig_type
->dwo_unit
!= NULL
);
5582 cleanups
= make_cleanup (null_cleanup
, NULL
);
5584 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5586 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
5588 /* There's no need to do the rereading_dwo_cu handling that
5589 init_cutu_and_read_dies does since we don't read the stub. */
5593 /* If !use_existing_cu, this_cu->cu must be NULL. */
5594 gdb_assert (this_cu
->cu
== NULL
);
5595 cu
= XNEW (struct dwarf2_cu
);
5596 init_one_comp_unit (cu
, this_cu
);
5597 /* If an error occurs while loading, release our storage. */
5598 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5601 /* A future optimization, if needed, would be to use an existing
5602 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
5603 could share abbrev tables. */
5605 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
5606 0 /* abbrev_table_provided */,
5607 NULL
/* stub_comp_unit_die */,
5608 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
5610 &comp_unit_die
, &has_children
) == 0)
5613 do_cleanups (cleanups
);
5617 /* All the "real" work is done here. */
5618 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5620 /* This duplicates the code in init_cutu_and_read_dies,
5621 but the alternative is making the latter more complex.
5622 This function is only for the special case of using DWO files directly:
5623 no point in overly complicating the general case just to handle this. */
5624 if (free_cu_cleanup
!= NULL
)
5628 /* We've successfully allocated this compilation unit. Let our
5629 caller clean it up when finished with it. */
5630 discard_cleanups (free_cu_cleanup
);
5632 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5633 So we have to manually free the abbrev table. */
5634 dwarf2_free_abbrev_table (cu
);
5636 /* Link this CU into read_in_chain. */
5637 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5638 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5641 do_cleanups (free_cu_cleanup
);
5644 do_cleanups (cleanups
);
5647 /* Initialize a CU (or TU) and read its DIEs.
5648 If the CU defers to a DWO file, read the DWO file as well.
5650 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
5651 Otherwise the table specified in the comp unit header is read in and used.
5652 This is an optimization for when we already have the abbrev table.
5654 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
5655 Otherwise, a new CU is allocated with xmalloc.
5657 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
5658 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
5660 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5661 linker) then DIE_READER_FUNC will not get called. */
5664 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
5665 struct abbrev_table
*abbrev_table
,
5666 int use_existing_cu
, int keep
,
5667 die_reader_func_ftype
*die_reader_func
,
5670 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5671 struct dwarf2_section_info
*section
= this_cu
->section
;
5672 bfd
*abfd
= get_section_bfd_owner (section
);
5673 struct dwarf2_cu
*cu
;
5674 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5675 struct die_reader_specs reader
;
5676 struct die_info
*comp_unit_die
;
5678 struct attribute
*attr
;
5679 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5680 struct signatured_type
*sig_type
= NULL
;
5681 struct dwarf2_section_info
*abbrev_section
;
5682 /* Non-zero if CU currently points to a DWO file and we need to
5683 reread it. When this happens we need to reread the skeleton die
5684 before we can reread the DWO file (this only applies to CUs, not TUs). */
5685 int rereading_dwo_cu
= 0;
5687 if (dwarf_die_debug
)
5688 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5689 this_cu
->is_debug_types
? "type" : "comp",
5690 to_underlying (this_cu
->sect_off
));
5692 if (use_existing_cu
)
5695 /* If we're reading a TU directly from a DWO file, including a virtual DWO
5696 file (instead of going through the stub), short-circuit all of this. */
5697 if (this_cu
->reading_dwo_directly
)
5699 /* Narrow down the scope of possibilities to have to understand. */
5700 gdb_assert (this_cu
->is_debug_types
);
5701 gdb_assert (abbrev_table
== NULL
);
5702 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
, keep
,
5703 die_reader_func
, data
);
5707 cleanups
= make_cleanup (null_cleanup
, NULL
);
5709 /* This is cheap if the section is already read in. */
5710 dwarf2_read_section (objfile
, section
);
5712 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
5714 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
5716 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5719 /* If this CU is from a DWO file we need to start over, we need to
5720 refetch the attributes from the skeleton CU.
5721 This could be optimized by retrieving those attributes from when we
5722 were here the first time: the previous comp_unit_die was stored in
5723 comp_unit_obstack. But there's no data yet that we need this
5725 if (cu
->dwo_unit
!= NULL
)
5726 rereading_dwo_cu
= 1;
5730 /* If !use_existing_cu, this_cu->cu must be NULL. */
5731 gdb_assert (this_cu
->cu
== NULL
);
5732 cu
= XNEW (struct dwarf2_cu
);
5733 init_one_comp_unit (cu
, this_cu
);
5734 /* If an error occurs while loading, release our storage. */
5735 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5738 /* Get the header. */
5739 if (to_underlying (cu
->header
.first_die_cu_offset
) != 0 && !rereading_dwo_cu
)
5741 /* We already have the header, there's no need to read it in again. */
5742 info_ptr
+= to_underlying (cu
->header
.first_die_cu_offset
);
5746 if (this_cu
->is_debug_types
)
5748 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5749 abbrev_section
, info_ptr
,
5752 /* Since per_cu is the first member of struct signatured_type,
5753 we can go from a pointer to one to a pointer to the other. */
5754 sig_type
= (struct signatured_type
*) this_cu
;
5755 gdb_assert (sig_type
->signature
== cu
->header
.signature
);
5756 gdb_assert (sig_type
->type_offset_in_tu
5757 == cu
->header
.type_cu_offset_in_tu
);
5758 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
5760 /* LENGTH has not been set yet for type units if we're
5761 using .gdb_index. */
5762 this_cu
->length
= get_cu_length (&cu
->header
);
5764 /* Establish the type offset that can be used to lookup the type. */
5765 sig_type
->type_offset_in_section
=
5766 this_cu
->sect_off
+ to_underlying (sig_type
->type_offset_in_tu
);
5768 this_cu
->dwarf_version
= cu
->header
.version
;
5772 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5775 rcuh_kind::COMPILE
);
5777 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
5778 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
5779 this_cu
->dwarf_version
= cu
->header
.version
;
5783 /* Skip dummy compilation units. */
5784 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5785 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5787 do_cleanups (cleanups
);
5791 /* If we don't have them yet, read the abbrevs for this compilation unit.
5792 And if we need to read them now, make sure they're freed when we're
5793 done. Note that it's important that if the CU had an abbrev table
5794 on entry we don't free it when we're done: Somewhere up the call stack
5795 it may be in use. */
5796 if (abbrev_table
!= NULL
)
5798 gdb_assert (cu
->abbrev_table
== NULL
);
5799 gdb_assert (cu
->header
.abbrev_sect_off
== abbrev_table
->sect_off
);
5800 cu
->abbrev_table
= abbrev_table
;
5802 else if (cu
->abbrev_table
== NULL
)
5804 dwarf2_read_abbrevs (cu
, abbrev_section
);
5805 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5807 else if (rereading_dwo_cu
)
5809 dwarf2_free_abbrev_table (cu
);
5810 dwarf2_read_abbrevs (cu
, abbrev_section
);
5813 /* Read the top level CU/TU die. */
5814 init_cu_die_reader (&reader
, cu
, section
, NULL
);
5815 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5817 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
5819 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
5820 DWO CU, that this test will fail (the attribute will not be present). */
5821 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5824 struct dwo_unit
*dwo_unit
;
5825 struct die_info
*dwo_comp_unit_die
;
5829 complaint (&symfile_complaints
,
5830 _("compilation unit with DW_AT_GNU_dwo_name"
5831 " has children (offset 0x%x) [in module %s]"),
5832 to_underlying (this_cu
->sect_off
), bfd_get_filename (abfd
));
5834 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
);
5835 if (dwo_unit
!= NULL
)
5837 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
5838 abbrev_table
!= NULL
,
5839 comp_unit_die
, NULL
,
5841 &dwo_comp_unit_die
, &has_children
) == 0)
5844 do_cleanups (cleanups
);
5847 comp_unit_die
= dwo_comp_unit_die
;
5851 /* Yikes, we couldn't find the rest of the DIE, we only have
5852 the stub. A complaint has already been logged. There's
5853 not much more we can do except pass on the stub DIE to
5854 die_reader_func. We don't want to throw an error on bad
5859 /* All of the above is setup for this call. Yikes. */
5860 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5862 /* Done, clean up. */
5863 if (free_cu_cleanup
!= NULL
)
5867 /* We've successfully allocated this compilation unit. Let our
5868 caller clean it up when finished with it. */
5869 discard_cleanups (free_cu_cleanup
);
5871 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5872 So we have to manually free the abbrev table. */
5873 dwarf2_free_abbrev_table (cu
);
5875 /* Link this CU into read_in_chain. */
5876 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5877 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5880 do_cleanups (free_cu_cleanup
);
5883 do_cleanups (cleanups
);
5886 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present.
5887 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed
5888 to have already done the lookup to find the DWO file).
5890 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
5891 THIS_CU->is_debug_types, but nothing else.
5893 We fill in THIS_CU->length.
5895 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5896 linker) then DIE_READER_FUNC will not get called.
5898 THIS_CU->cu is always freed when done.
5899 This is done in order to not leave THIS_CU->cu in a state where we have
5900 to care whether it refers to the "main" CU or the DWO CU. */
5903 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
5904 struct dwo_file
*dwo_file
,
5905 die_reader_func_ftype
*die_reader_func
,
5908 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5909 struct dwarf2_section_info
*section
= this_cu
->section
;
5910 bfd
*abfd
= get_section_bfd_owner (section
);
5911 struct dwarf2_section_info
*abbrev_section
;
5912 struct dwarf2_cu cu
;
5913 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5914 struct die_reader_specs reader
;
5915 struct cleanup
*cleanups
;
5916 struct die_info
*comp_unit_die
;
5919 if (dwarf_die_debug
)
5920 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5921 this_cu
->is_debug_types
? "type" : "comp",
5922 to_underlying (this_cu
->sect_off
));
5924 gdb_assert (this_cu
->cu
== NULL
);
5926 abbrev_section
= (dwo_file
!= NULL
5927 ? &dwo_file
->sections
.abbrev
5928 : get_abbrev_section_for_cu (this_cu
));
5930 /* This is cheap if the section is already read in. */
5931 dwarf2_read_section (objfile
, section
);
5933 init_one_comp_unit (&cu
, this_cu
);
5935 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
5937 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
5938 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, section
,
5939 abbrev_section
, info_ptr
,
5940 (this_cu
->is_debug_types
5942 : rcuh_kind::COMPILE
));
5944 this_cu
->length
= get_cu_length (&cu
.header
);
5946 /* Skip dummy compilation units. */
5947 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5948 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5950 do_cleanups (cleanups
);
5954 dwarf2_read_abbrevs (&cu
, abbrev_section
);
5955 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
5957 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
);
5958 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5960 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5962 do_cleanups (cleanups
);
5965 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
5966 does not lookup the specified DWO file.
5967 This cannot be used to read DWO files.
5969 THIS_CU->cu is always freed when done.
5970 This is done in order to not leave THIS_CU->cu in a state where we have
5971 to care whether it refers to the "main" CU or the DWO CU.
5972 We can revisit this if the data shows there's a performance issue. */
5975 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
5976 die_reader_func_ftype
*die_reader_func
,
5979 init_cutu_and_read_dies_no_follow (this_cu
, NULL
, die_reader_func
, data
);
5982 /* Type Unit Groups.
5984 Type Unit Groups are a way to collapse the set of all TUs (type units) into
5985 a more manageable set. The grouping is done by DW_AT_stmt_list entry
5986 so that all types coming from the same compilation (.o file) are grouped
5987 together. A future step could be to put the types in the same symtab as
5988 the CU the types ultimately came from. */
5991 hash_type_unit_group (const void *item
)
5993 const struct type_unit_group
*tu_group
5994 = (const struct type_unit_group
*) item
;
5996 return hash_stmt_list_entry (&tu_group
->hash
);
6000 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
6002 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
6003 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
6005 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
6008 /* Allocate a hash table for type unit groups. */
6011 allocate_type_unit_groups_table (void)
6013 return htab_create_alloc_ex (3,
6014 hash_type_unit_group
,
6017 &dwarf2_per_objfile
->objfile
->objfile_obstack
,
6018 hashtab_obstack_allocate
,
6019 dummy_obstack_deallocate
);
6022 /* Type units that don't have DW_AT_stmt_list are grouped into their own
6023 partial symtabs. We combine several TUs per psymtab to not let the size
6024 of any one psymtab grow too big. */
6025 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
6026 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
6028 /* Helper routine for get_type_unit_group.
6029 Create the type_unit_group object used to hold one or more TUs. */
6031 static struct type_unit_group
*
6032 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
6034 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6035 struct dwarf2_per_cu_data
*per_cu
;
6036 struct type_unit_group
*tu_group
;
6038 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6039 struct type_unit_group
);
6040 per_cu
= &tu_group
->per_cu
;
6041 per_cu
->objfile
= objfile
;
6043 if (dwarf2_per_objfile
->using_index
)
6045 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6046 struct dwarf2_per_cu_quick_data
);
6050 unsigned int line_offset
= to_underlying (line_offset_struct
);
6051 struct partial_symtab
*pst
;
6054 /* Give the symtab a useful name for debug purposes. */
6055 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
6056 name
= xstrprintf ("<type_units_%d>",
6057 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
6059 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
6061 pst
= create_partial_symtab (per_cu
, name
);
6067 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
6068 tu_group
->hash
.line_sect_off
= line_offset_struct
;
6073 /* Look up the type_unit_group for type unit CU, and create it if necessary.
6074 STMT_LIST is a DW_AT_stmt_list attribute. */
6076 static struct type_unit_group
*
6077 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
6079 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6080 struct type_unit_group
*tu_group
;
6082 unsigned int line_offset
;
6083 struct type_unit_group type_unit_group_for_lookup
;
6085 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
6087 dwarf2_per_objfile
->type_unit_groups
=
6088 allocate_type_unit_groups_table ();
6091 /* Do we need to create a new group, or can we use an existing one? */
6095 line_offset
= DW_UNSND (stmt_list
);
6096 ++tu_stats
->nr_symtab_sharers
;
6100 /* Ugh, no stmt_list. Rare, but we have to handle it.
6101 We can do various things here like create one group per TU or
6102 spread them over multiple groups to split up the expansion work.
6103 To avoid worst case scenarios (too many groups or too large groups)
6104 we, umm, group them in bunches. */
6105 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
6106 | (tu_stats
->nr_stmt_less_type_units
6107 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
6108 ++tu_stats
->nr_stmt_less_type_units
;
6111 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
6112 type_unit_group_for_lookup
.hash
.line_sect_off
= (sect_offset
) line_offset
;
6113 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
6114 &type_unit_group_for_lookup
, INSERT
);
6117 tu_group
= (struct type_unit_group
*) *slot
;
6118 gdb_assert (tu_group
!= NULL
);
6122 sect_offset line_offset_struct
= (sect_offset
) line_offset
;
6123 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
6125 ++tu_stats
->nr_symtabs
;
6131 /* Partial symbol tables. */
6133 /* Create a psymtab named NAME and assign it to PER_CU.
6135 The caller must fill in the following details:
6136 dirname, textlow, texthigh. */
6138 static struct partial_symtab
*
6139 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
6141 struct objfile
*objfile
= per_cu
->objfile
;
6142 struct partial_symtab
*pst
;
6144 pst
= start_psymtab_common (objfile
, name
, 0,
6145 objfile
->global_psymbols
,
6146 objfile
->static_psymbols
);
6148 pst
->psymtabs_addrmap_supported
= 1;
6150 /* This is the glue that links PST into GDB's symbol API. */
6151 pst
->read_symtab_private
= per_cu
;
6152 pst
->read_symtab
= dwarf2_read_symtab
;
6153 per_cu
->v
.psymtab
= pst
;
6158 /* The DATA object passed to process_psymtab_comp_unit_reader has this
6161 struct process_psymtab_comp_unit_data
6163 /* True if we are reading a DW_TAG_partial_unit. */
6165 int want_partial_unit
;
6167 /* The "pretend" language that is used if the CU doesn't declare a
6170 enum language pretend_language
;
6173 /* die_reader_func for process_psymtab_comp_unit. */
6176 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
6177 const gdb_byte
*info_ptr
,
6178 struct die_info
*comp_unit_die
,
6182 struct dwarf2_cu
*cu
= reader
->cu
;
6183 struct objfile
*objfile
= cu
->objfile
;
6184 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6185 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
6187 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
6188 struct partial_symtab
*pst
;
6189 enum pc_bounds_kind cu_bounds_kind
;
6190 const char *filename
;
6191 struct process_psymtab_comp_unit_data
*info
6192 = (struct process_psymtab_comp_unit_data
*) data
;
6194 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !info
->want_partial_unit
)
6197 gdb_assert (! per_cu
->is_debug_types
);
6199 prepare_one_comp_unit (cu
, comp_unit_die
, info
->pretend_language
);
6201 cu
->list_in_scope
= &file_symbols
;
6203 /* Allocate a new partial symbol table structure. */
6204 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
6205 if (filename
== NULL
)
6208 pst
= create_partial_symtab (per_cu
, filename
);
6210 /* This must be done before calling dwarf2_build_include_psymtabs. */
6211 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
6213 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6215 dwarf2_find_base_address (comp_unit_die
, cu
);
6217 /* Possibly set the default values of LOWPC and HIGHPC from
6219 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
6220 &best_highpc
, cu
, pst
);
6221 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
6222 /* Store the contiguous range if it is not empty; it can be empty for
6223 CUs with no code. */
6224 addrmap_set_empty (objfile
->psymtabs_addrmap
,
6225 gdbarch_adjust_dwarf2_addr (gdbarch
,
6226 best_lowpc
+ baseaddr
),
6227 gdbarch_adjust_dwarf2_addr (gdbarch
,
6228 best_highpc
+ baseaddr
) - 1,
6231 /* Check if comp unit has_children.
6232 If so, read the rest of the partial symbols from this comp unit.
6233 If not, there's no more debug_info for this comp unit. */
6236 struct partial_die_info
*first_die
;
6237 CORE_ADDR lowpc
, highpc
;
6239 lowpc
= ((CORE_ADDR
) -1);
6240 highpc
= ((CORE_ADDR
) 0);
6242 first_die
= load_partial_dies (reader
, info_ptr
, 1);
6244 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
6245 cu_bounds_kind
<= PC_BOUNDS_INVALID
, cu
);
6247 /* If we didn't find a lowpc, set it to highpc to avoid
6248 complaints from `maint check'. */
6249 if (lowpc
== ((CORE_ADDR
) -1))
6252 /* If the compilation unit didn't have an explicit address range,
6253 then use the information extracted from its child dies. */
6254 if (cu_bounds_kind
<= PC_BOUNDS_INVALID
)
6257 best_highpc
= highpc
;
6260 pst
->textlow
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
);
6261 pst
->texthigh
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
);
6263 end_psymtab_common (objfile
, pst
);
6265 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
6268 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
6269 struct dwarf2_per_cu_data
*iter
;
6271 /* Fill in 'dependencies' here; we fill in 'users' in a
6273 pst
->number_of_dependencies
= len
;
6275 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
6277 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
6280 pst
->dependencies
[i
] = iter
->v
.psymtab
;
6282 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
6285 /* Get the list of files included in the current compilation unit,
6286 and build a psymtab for each of them. */
6287 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
6289 if (dwarf_read_debug
)
6291 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6293 fprintf_unfiltered (gdb_stdlog
,
6294 "Psymtab for %s unit @0x%x: %s - %s"
6295 ", %d global, %d static syms\n",
6296 per_cu
->is_debug_types
? "type" : "comp",
6297 to_underlying (per_cu
->sect_off
),
6298 paddress (gdbarch
, pst
->textlow
),
6299 paddress (gdbarch
, pst
->texthigh
),
6300 pst
->n_global_syms
, pst
->n_static_syms
);
6304 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6305 Process compilation unit THIS_CU for a psymtab. */
6308 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
6309 int want_partial_unit
,
6310 enum language pretend_language
)
6312 /* If this compilation unit was already read in, free the
6313 cached copy in order to read it in again. This is
6314 necessary because we skipped some symbols when we first
6315 read in the compilation unit (see load_partial_dies).
6316 This problem could be avoided, but the benefit is unclear. */
6317 if (this_cu
->cu
!= NULL
)
6318 free_one_cached_comp_unit (this_cu
);
6320 if (this_cu
->is_debug_types
)
6321 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0, build_type_psymtabs_reader
,
6325 process_psymtab_comp_unit_data info
;
6326 info
.want_partial_unit
= want_partial_unit
;
6327 info
.pretend_language
= pretend_language
;
6328 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0,
6329 process_psymtab_comp_unit_reader
, &info
);
6332 /* Age out any secondary CUs. */
6333 age_cached_comp_units ();
6336 /* Reader function for build_type_psymtabs. */
6339 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
6340 const gdb_byte
*info_ptr
,
6341 struct die_info
*type_unit_die
,
6345 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6346 struct dwarf2_cu
*cu
= reader
->cu
;
6347 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
6348 struct signatured_type
*sig_type
;
6349 struct type_unit_group
*tu_group
;
6350 struct attribute
*attr
;
6351 struct partial_die_info
*first_die
;
6352 CORE_ADDR lowpc
, highpc
;
6353 struct partial_symtab
*pst
;
6355 gdb_assert (data
== NULL
);
6356 gdb_assert (per_cu
->is_debug_types
);
6357 sig_type
= (struct signatured_type
*) per_cu
;
6362 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
6363 tu_group
= get_type_unit_group (cu
, attr
);
6365 VEC_safe_push (sig_type_ptr
, tu_group
->tus
, sig_type
);
6367 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
6368 cu
->list_in_scope
= &file_symbols
;
6369 pst
= create_partial_symtab (per_cu
, "");
6372 first_die
= load_partial_dies (reader
, info_ptr
, 1);
6374 lowpc
= (CORE_ADDR
) -1;
6375 highpc
= (CORE_ADDR
) 0;
6376 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
6378 end_psymtab_common (objfile
, pst
);
6381 /* Struct used to sort TUs by their abbreviation table offset. */
6383 struct tu_abbrev_offset
6385 struct signatured_type
*sig_type
;
6386 sect_offset abbrev_offset
;
6389 /* Helper routine for build_type_psymtabs_1, passed to qsort. */
6392 sort_tu_by_abbrev_offset (const void *ap
, const void *bp
)
6394 const struct tu_abbrev_offset
* const *a
6395 = (const struct tu_abbrev_offset
* const*) ap
;
6396 const struct tu_abbrev_offset
* const *b
6397 = (const struct tu_abbrev_offset
* const*) bp
;
6398 sect_offset aoff
= (*a
)->abbrev_offset
;
6399 sect_offset boff
= (*b
)->abbrev_offset
;
6401 return (aoff
> boff
) - (aoff
< boff
);
6404 /* Efficiently read all the type units.
6405 This does the bulk of the work for build_type_psymtabs.
6407 The efficiency is because we sort TUs by the abbrev table they use and
6408 only read each abbrev table once. In one program there are 200K TUs
6409 sharing 8K abbrev tables.
6411 The main purpose of this function is to support building the
6412 dwarf2_per_objfile->type_unit_groups table.
6413 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
6414 can collapse the search space by grouping them by stmt_list.
6415 The savings can be significant, in the same program from above the 200K TUs
6416 share 8K stmt_list tables.
6418 FUNC is expected to call get_type_unit_group, which will create the
6419 struct type_unit_group if necessary and add it to
6420 dwarf2_per_objfile->type_unit_groups. */
6423 build_type_psymtabs_1 (void)
6425 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6426 struct cleanup
*cleanups
;
6427 struct abbrev_table
*abbrev_table
;
6428 sect_offset abbrev_offset
;
6429 struct tu_abbrev_offset
*sorted_by_abbrev
;
6432 /* It's up to the caller to not call us multiple times. */
6433 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
6435 if (dwarf2_per_objfile
->n_type_units
== 0)
6438 /* TUs typically share abbrev tables, and there can be way more TUs than
6439 abbrev tables. Sort by abbrev table to reduce the number of times we
6440 read each abbrev table in.
6441 Alternatives are to punt or to maintain a cache of abbrev tables.
6442 This is simpler and efficient enough for now.
6444 Later we group TUs by their DW_AT_stmt_list value (as this defines the
6445 symtab to use). Typically TUs with the same abbrev offset have the same
6446 stmt_list value too so in practice this should work well.
6448 The basic algorithm here is:
6450 sort TUs by abbrev table
6451 for each TU with same abbrev table:
6452 read abbrev table if first user
6453 read TU top level DIE
6454 [IWBN if DWO skeletons had DW_AT_stmt_list]
6457 if (dwarf_read_debug
)
6458 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
6460 /* Sort in a separate table to maintain the order of all_type_units
6461 for .gdb_index: TU indices directly index all_type_units. */
6462 sorted_by_abbrev
= XNEWVEC (struct tu_abbrev_offset
,
6463 dwarf2_per_objfile
->n_type_units
);
6464 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6466 struct signatured_type
*sig_type
= dwarf2_per_objfile
->all_type_units
[i
];
6468 sorted_by_abbrev
[i
].sig_type
= sig_type
;
6469 sorted_by_abbrev
[i
].abbrev_offset
=
6470 read_abbrev_offset (sig_type
->per_cu
.section
,
6471 sig_type
->per_cu
.sect_off
);
6473 cleanups
= make_cleanup (xfree
, sorted_by_abbrev
);
6474 qsort (sorted_by_abbrev
, dwarf2_per_objfile
->n_type_units
,
6475 sizeof (struct tu_abbrev_offset
), sort_tu_by_abbrev_offset
);
6477 abbrev_offset
= (sect_offset
) ~(unsigned) 0;
6478 abbrev_table
= NULL
;
6479 make_cleanup (abbrev_table_free_cleanup
, &abbrev_table
);
6481 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6483 const struct tu_abbrev_offset
*tu
= &sorted_by_abbrev
[i
];
6485 /* Switch to the next abbrev table if necessary. */
6486 if (abbrev_table
== NULL
6487 || tu
->abbrev_offset
!= abbrev_offset
)
6489 if (abbrev_table
!= NULL
)
6491 abbrev_table_free (abbrev_table
);
6492 /* Reset to NULL in case abbrev_table_read_table throws
6493 an error: abbrev_table_free_cleanup will get called. */
6494 abbrev_table
= NULL
;
6496 abbrev_offset
= tu
->abbrev_offset
;
6498 abbrev_table_read_table (&dwarf2_per_objfile
->abbrev
,
6500 ++tu_stats
->nr_uniq_abbrev_tables
;
6503 init_cutu_and_read_dies (&tu
->sig_type
->per_cu
, abbrev_table
, 0, 0,
6504 build_type_psymtabs_reader
, NULL
);
6507 do_cleanups (cleanups
);
6510 /* Print collected type unit statistics. */
6513 print_tu_stats (void)
6515 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6517 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
6518 fprintf_unfiltered (gdb_stdlog
, " %d TUs\n",
6519 dwarf2_per_objfile
->n_type_units
);
6520 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
6521 tu_stats
->nr_uniq_abbrev_tables
);
6522 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
6523 tu_stats
->nr_symtabs
);
6524 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
6525 tu_stats
->nr_symtab_sharers
);
6526 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
6527 tu_stats
->nr_stmt_less_type_units
);
6528 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
6529 tu_stats
->nr_all_type_units_reallocs
);
6532 /* Traversal function for build_type_psymtabs. */
6535 build_type_psymtab_dependencies (void **slot
, void *info
)
6537 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6538 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
6539 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
6540 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6541 int len
= VEC_length (sig_type_ptr
, tu_group
->tus
);
6542 struct signatured_type
*iter
;
6545 gdb_assert (len
> 0);
6546 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
6548 pst
->number_of_dependencies
= len
;
6550 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
6552 VEC_iterate (sig_type_ptr
, tu_group
->tus
, i
, iter
);
6555 gdb_assert (iter
->per_cu
.is_debug_types
);
6556 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
6557 iter
->type_unit_group
= tu_group
;
6560 VEC_free (sig_type_ptr
, tu_group
->tus
);
6565 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6566 Build partial symbol tables for the .debug_types comp-units. */
6569 build_type_psymtabs (struct objfile
*objfile
)
6571 if (! create_all_type_units (objfile
))
6574 build_type_psymtabs_1 ();
6577 /* Traversal function for process_skeletonless_type_unit.
6578 Read a TU in a DWO file and build partial symbols for it. */
6581 process_skeletonless_type_unit (void **slot
, void *info
)
6583 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
6584 struct objfile
*objfile
= (struct objfile
*) info
;
6585 struct signatured_type find_entry
, *entry
;
6587 /* If this TU doesn't exist in the global table, add it and read it in. */
6589 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6591 dwarf2_per_objfile
->signatured_types
6592 = allocate_signatured_type_table (objfile
);
6595 find_entry
.signature
= dwo_unit
->signature
;
6596 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
, &find_entry
,
6598 /* If we've already seen this type there's nothing to do. What's happening
6599 is we're doing our own version of comdat-folding here. */
6603 /* This does the job that create_all_type_units would have done for
6605 entry
= add_type_unit (dwo_unit
->signature
, slot
);
6606 fill_in_sig_entry_from_dwo_entry (objfile
, entry
, dwo_unit
);
6609 /* This does the job that build_type_psymtabs_1 would have done. */
6610 init_cutu_and_read_dies (&entry
->per_cu
, NULL
, 0, 0,
6611 build_type_psymtabs_reader
, NULL
);
6616 /* Traversal function for process_skeletonless_type_units. */
6619 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
6621 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
6623 if (dwo_file
->tus
!= NULL
)
6625 htab_traverse_noresize (dwo_file
->tus
,
6626 process_skeletonless_type_unit
, info
);
6632 /* Scan all TUs of DWO files, verifying we've processed them.
6633 This is needed in case a TU was emitted without its skeleton.
6634 Note: This can't be done until we know what all the DWO files are. */
6637 process_skeletonless_type_units (struct objfile
*objfile
)
6639 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
6640 if (get_dwp_file () == NULL
6641 && dwarf2_per_objfile
->dwo_files
!= NULL
)
6643 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
,
6644 process_dwo_file_for_skeletonless_type_units
,
6649 /* Compute the 'user' field for each psymtab in OBJFILE. */
6652 set_partial_user (struct objfile
*objfile
)
6656 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6658 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6659 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6665 for (j
= 0; j
< pst
->number_of_dependencies
; ++j
)
6667 /* Set the 'user' field only if it is not already set. */
6668 if (pst
->dependencies
[j
]->user
== NULL
)
6669 pst
->dependencies
[j
]->user
= pst
;
6674 /* Build the partial symbol table by doing a quick pass through the
6675 .debug_info and .debug_abbrev sections. */
6678 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
6680 struct cleanup
*back_to
;
6683 if (dwarf_read_debug
)
6685 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
6686 objfile_name (objfile
));
6689 dwarf2_per_objfile
->reading_partial_symbols
= 1;
6691 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
6693 /* Any cached compilation units will be linked by the per-objfile
6694 read_in_chain. Make sure to free them when we're done. */
6695 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
6697 build_type_psymtabs (objfile
);
6699 create_all_comp_units (objfile
);
6701 /* Create a temporary address map on a temporary obstack. We later
6702 copy this to the final obstack. */
6703 auto_obstack temp_obstack
;
6705 scoped_restore save_psymtabs_addrmap
6706 = make_scoped_restore (&objfile
->psymtabs_addrmap
,
6707 addrmap_create_mutable (&temp_obstack
));
6709 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6711 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6713 process_psymtab_comp_unit (per_cu
, 0, language_minimal
);
6716 /* This has to wait until we read the CUs, we need the list of DWOs. */
6717 process_skeletonless_type_units (objfile
);
6719 /* Now that all TUs have been processed we can fill in the dependencies. */
6720 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
6722 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
6723 build_type_psymtab_dependencies
, NULL
);
6726 if (dwarf_read_debug
)
6729 set_partial_user (objfile
);
6731 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
6732 &objfile
->objfile_obstack
);
6733 /* At this point we want to keep the address map. */
6734 save_psymtabs_addrmap
.release ();
6736 do_cleanups (back_to
);
6738 if (dwarf_read_debug
)
6739 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
6740 objfile_name (objfile
));
6743 /* die_reader_func for load_partial_comp_unit. */
6746 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
6747 const gdb_byte
*info_ptr
,
6748 struct die_info
*comp_unit_die
,
6752 struct dwarf2_cu
*cu
= reader
->cu
;
6754 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
6756 /* Check if comp unit has_children.
6757 If so, read the rest of the partial symbols from this comp unit.
6758 If not, there's no more debug_info for this comp unit. */
6760 load_partial_dies (reader
, info_ptr
, 0);
6763 /* Load the partial DIEs for a secondary CU into memory.
6764 This is also used when rereading a primary CU with load_all_dies. */
6767 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
6769 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
6770 load_partial_comp_unit_reader
, NULL
);
6774 read_comp_units_from_section (struct objfile
*objfile
,
6775 struct dwarf2_section_info
*section
,
6776 struct dwarf2_section_info
*abbrev_section
,
6777 unsigned int is_dwz
,
6780 struct dwarf2_per_cu_data
***all_comp_units
)
6782 const gdb_byte
*info_ptr
;
6783 bfd
*abfd
= get_section_bfd_owner (section
);
6785 if (dwarf_read_debug
)
6786 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
6787 get_section_name (section
),
6788 get_section_file_name (section
));
6790 dwarf2_read_section (objfile
, section
);
6792 info_ptr
= section
->buffer
;
6794 while (info_ptr
< section
->buffer
+ section
->size
)
6796 struct dwarf2_per_cu_data
*this_cu
;
6798 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
->buffer
);
6800 comp_unit_head cu_header
;
6801 read_and_check_comp_unit_head (&cu_header
, section
, abbrev_section
,
6802 info_ptr
, rcuh_kind::COMPILE
);
6804 /* Save the compilation unit for later lookup. */
6805 if (cu_header
.unit_type
!= DW_UT_type
)
6807 this_cu
= XOBNEW (&objfile
->objfile_obstack
,
6808 struct dwarf2_per_cu_data
);
6809 memset (this_cu
, 0, sizeof (*this_cu
));
6813 auto sig_type
= XOBNEW (&objfile
->objfile_obstack
,
6814 struct signatured_type
);
6815 memset (sig_type
, 0, sizeof (*sig_type
));
6816 sig_type
->signature
= cu_header
.signature
;
6817 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
6818 this_cu
= &sig_type
->per_cu
;
6820 this_cu
->is_debug_types
= (cu_header
.unit_type
== DW_UT_type
);
6821 this_cu
->sect_off
= sect_off
;
6822 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
6823 this_cu
->is_dwz
= is_dwz
;
6824 this_cu
->objfile
= objfile
;
6825 this_cu
->section
= section
;
6827 if (*n_comp_units
== *n_allocated
)
6830 *all_comp_units
= XRESIZEVEC (struct dwarf2_per_cu_data
*,
6831 *all_comp_units
, *n_allocated
);
6833 (*all_comp_units
)[*n_comp_units
] = this_cu
;
6836 info_ptr
= info_ptr
+ this_cu
->length
;
6840 /* Create a list of all compilation units in OBJFILE.
6841 This is only done for -readnow and building partial symtabs. */
6844 create_all_comp_units (struct objfile
*objfile
)
6848 struct dwarf2_per_cu_data
**all_comp_units
;
6849 struct dwz_file
*dwz
;
6853 all_comp_units
= XNEWVEC (struct dwarf2_per_cu_data
*, n_allocated
);
6855 read_comp_units_from_section (objfile
, &dwarf2_per_objfile
->info
,
6856 &dwarf2_per_objfile
->abbrev
, 0,
6857 &n_allocated
, &n_comp_units
, &all_comp_units
);
6859 dwz
= dwarf2_get_dwz_file ();
6861 read_comp_units_from_section (objfile
, &dwz
->info
, &dwz
->abbrev
, 1,
6862 &n_allocated
, &n_comp_units
,
6865 dwarf2_per_objfile
->all_comp_units
= XOBNEWVEC (&objfile
->objfile_obstack
,
6866 struct dwarf2_per_cu_data
*,
6868 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
6869 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
6870 xfree (all_comp_units
);
6871 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
6874 /* Process all loaded DIEs for compilation unit CU, starting at
6875 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
6876 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
6877 DW_AT_ranges). See the comments of add_partial_subprogram on how
6878 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
6881 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
6882 CORE_ADDR
*highpc
, int set_addrmap
,
6883 struct dwarf2_cu
*cu
)
6885 struct partial_die_info
*pdi
;
6887 /* Now, march along the PDI's, descending into ones which have
6888 interesting children but skipping the children of the other ones,
6889 until we reach the end of the compilation unit. */
6895 fixup_partial_die (pdi
, cu
);
6897 /* Anonymous namespaces or modules have no name but have interesting
6898 children, so we need to look at them. Ditto for anonymous
6901 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
6902 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
6903 || pdi
->tag
== DW_TAG_imported_unit
)
6907 case DW_TAG_subprogram
:
6908 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6910 case DW_TAG_constant
:
6911 case DW_TAG_variable
:
6912 case DW_TAG_typedef
:
6913 case DW_TAG_union_type
:
6914 if (!pdi
->is_declaration
)
6916 add_partial_symbol (pdi
, cu
);
6919 case DW_TAG_class_type
:
6920 case DW_TAG_interface_type
:
6921 case DW_TAG_structure_type
:
6922 if (!pdi
->is_declaration
)
6924 add_partial_symbol (pdi
, cu
);
6926 if (cu
->language
== language_rust
&& pdi
->has_children
)
6927 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
6930 case DW_TAG_enumeration_type
:
6931 if (!pdi
->is_declaration
)
6932 add_partial_enumeration (pdi
, cu
);
6934 case DW_TAG_base_type
:
6935 case DW_TAG_subrange_type
:
6936 /* File scope base type definitions are added to the partial
6938 add_partial_symbol (pdi
, cu
);
6940 case DW_TAG_namespace
:
6941 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6944 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6946 case DW_TAG_imported_unit
:
6948 struct dwarf2_per_cu_data
*per_cu
;
6950 /* For now we don't handle imported units in type units. */
6951 if (cu
->per_cu
->is_debug_types
)
6953 error (_("Dwarf Error: DW_TAG_imported_unit is not"
6954 " supported in type units [in module %s]"),
6955 objfile_name (cu
->objfile
));
6958 per_cu
= dwarf2_find_containing_comp_unit (pdi
->d
.sect_off
,
6962 /* Go read the partial unit, if needed. */
6963 if (per_cu
->v
.psymtab
== NULL
)
6964 process_psymtab_comp_unit (per_cu
, 1, cu
->language
);
6966 VEC_safe_push (dwarf2_per_cu_ptr
,
6967 cu
->per_cu
->imported_symtabs
, per_cu
);
6970 case DW_TAG_imported_declaration
:
6971 add_partial_symbol (pdi
, cu
);
6978 /* If the die has a sibling, skip to the sibling. */
6980 pdi
= pdi
->die_sibling
;
6984 /* Functions used to compute the fully scoped name of a partial DIE.
6986 Normally, this is simple. For C++, the parent DIE's fully scoped
6987 name is concatenated with "::" and the partial DIE's name.
6988 Enumerators are an exception; they use the scope of their parent
6989 enumeration type, i.e. the name of the enumeration type is not
6990 prepended to the enumerator.
6992 There are two complexities. One is DW_AT_specification; in this
6993 case "parent" means the parent of the target of the specification,
6994 instead of the direct parent of the DIE. The other is compilers
6995 which do not emit DW_TAG_namespace; in this case we try to guess
6996 the fully qualified name of structure types from their members'
6997 linkage names. This must be done using the DIE's children rather
6998 than the children of any DW_AT_specification target. We only need
6999 to do this for structures at the top level, i.e. if the target of
7000 any DW_AT_specification (if any; otherwise the DIE itself) does not
7003 /* Compute the scope prefix associated with PDI's parent, in
7004 compilation unit CU. The result will be allocated on CU's
7005 comp_unit_obstack, or a copy of the already allocated PDI->NAME
7006 field. NULL is returned if no prefix is necessary. */
7008 partial_die_parent_scope (struct partial_die_info
*pdi
,
7009 struct dwarf2_cu
*cu
)
7011 const char *grandparent_scope
;
7012 struct partial_die_info
*parent
, *real_pdi
;
7014 /* We need to look at our parent DIE; if we have a DW_AT_specification,
7015 then this means the parent of the specification DIE. */
7018 while (real_pdi
->has_specification
)
7019 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
7020 real_pdi
->spec_is_dwz
, cu
);
7022 parent
= real_pdi
->die_parent
;
7026 if (parent
->scope_set
)
7027 return parent
->scope
;
7029 fixup_partial_die (parent
, cu
);
7031 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
7033 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
7034 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
7035 Work around this problem here. */
7036 if (cu
->language
== language_cplus
7037 && parent
->tag
== DW_TAG_namespace
7038 && strcmp (parent
->name
, "::") == 0
7039 && grandparent_scope
== NULL
)
7041 parent
->scope
= NULL
;
7042 parent
->scope_set
= 1;
7046 if (pdi
->tag
== DW_TAG_enumerator
)
7047 /* Enumerators should not get the name of the enumeration as a prefix. */
7048 parent
->scope
= grandparent_scope
;
7049 else if (parent
->tag
== DW_TAG_namespace
7050 || parent
->tag
== DW_TAG_module
7051 || parent
->tag
== DW_TAG_structure_type
7052 || parent
->tag
== DW_TAG_class_type
7053 || parent
->tag
== DW_TAG_interface_type
7054 || parent
->tag
== DW_TAG_union_type
7055 || parent
->tag
== DW_TAG_enumeration_type
)
7057 if (grandparent_scope
== NULL
)
7058 parent
->scope
= parent
->name
;
7060 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
7062 parent
->name
, 0, cu
);
7066 /* FIXME drow/2004-04-01: What should we be doing with
7067 function-local names? For partial symbols, we should probably be
7069 complaint (&symfile_complaints
,
7070 _("unhandled containing DIE tag %d for DIE at %d"),
7071 parent
->tag
, to_underlying (pdi
->sect_off
));
7072 parent
->scope
= grandparent_scope
;
7075 parent
->scope_set
= 1;
7076 return parent
->scope
;
7079 /* Return the fully scoped name associated with PDI, from compilation unit
7080 CU. The result will be allocated with malloc. */
7083 partial_die_full_name (struct partial_die_info
*pdi
,
7084 struct dwarf2_cu
*cu
)
7086 const char *parent_scope
;
7088 /* If this is a template instantiation, we can not work out the
7089 template arguments from partial DIEs. So, unfortunately, we have
7090 to go through the full DIEs. At least any work we do building
7091 types here will be reused if full symbols are loaded later. */
7092 if (pdi
->has_template_arguments
)
7094 fixup_partial_die (pdi
, cu
);
7096 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
7098 struct die_info
*die
;
7099 struct attribute attr
;
7100 struct dwarf2_cu
*ref_cu
= cu
;
7102 /* DW_FORM_ref_addr is using section offset. */
7103 attr
.name
= (enum dwarf_attribute
) 0;
7104 attr
.form
= DW_FORM_ref_addr
;
7105 attr
.u
.unsnd
= to_underlying (pdi
->sect_off
);
7106 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
7108 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
7112 parent_scope
= partial_die_parent_scope (pdi
, cu
);
7113 if (parent_scope
== NULL
)
7116 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
7120 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
7122 struct objfile
*objfile
= cu
->objfile
;
7123 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7125 const char *actual_name
= NULL
;
7127 char *built_actual_name
;
7129 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7131 built_actual_name
= partial_die_full_name (pdi
, cu
);
7132 if (built_actual_name
!= NULL
)
7133 actual_name
= built_actual_name
;
7135 if (actual_name
== NULL
)
7136 actual_name
= pdi
->name
;
7140 case DW_TAG_subprogram
:
7141 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
);
7142 if (pdi
->is_external
|| cu
->language
== language_ada
)
7144 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
7145 of the global scope. But in Ada, we want to be able to access
7146 nested procedures globally. So all Ada subprograms are stored
7147 in the global scope. */
7148 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7149 built_actual_name
!= NULL
,
7150 VAR_DOMAIN
, LOC_BLOCK
,
7151 &objfile
->global_psymbols
,
7152 addr
, cu
->language
, objfile
);
7156 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7157 built_actual_name
!= NULL
,
7158 VAR_DOMAIN
, LOC_BLOCK
,
7159 &objfile
->static_psymbols
,
7160 addr
, cu
->language
, objfile
);
7163 if (pdi
->main_subprogram
&& actual_name
!= NULL
)
7164 set_objfile_main_name (objfile
, actual_name
, cu
->language
);
7166 case DW_TAG_constant
:
7168 std::vector
<partial_symbol
*> *list
;
7170 if (pdi
->is_external
)
7171 list
= &objfile
->global_psymbols
;
7173 list
= &objfile
->static_psymbols
;
7174 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7175 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
7176 list
, 0, cu
->language
, objfile
);
7179 case DW_TAG_variable
:
7181 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
7185 && !dwarf2_per_objfile
->has_section_at_zero
)
7187 /* A global or static variable may also have been stripped
7188 out by the linker if unused, in which case its address
7189 will be nullified; do not add such variables into partial
7190 symbol table then. */
7192 else if (pdi
->is_external
)
7195 Don't enter into the minimal symbol tables as there is
7196 a minimal symbol table entry from the ELF symbols already.
7197 Enter into partial symbol table if it has a location
7198 descriptor or a type.
7199 If the location descriptor is missing, new_symbol will create
7200 a LOC_UNRESOLVED symbol, the address of the variable will then
7201 be determined from the minimal symbol table whenever the variable
7203 The address for the partial symbol table entry is not
7204 used by GDB, but it comes in handy for debugging partial symbol
7207 if (pdi
->d
.locdesc
|| pdi
->has_type
)
7208 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7209 built_actual_name
!= NULL
,
7210 VAR_DOMAIN
, LOC_STATIC
,
7211 &objfile
->global_psymbols
,
7213 cu
->language
, objfile
);
7217 int has_loc
= pdi
->d
.locdesc
!= NULL
;
7219 /* Static Variable. Skip symbols whose value we cannot know (those
7220 without location descriptors or constant values). */
7221 if (!has_loc
&& !pdi
->has_const_value
)
7223 xfree (built_actual_name
);
7227 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7228 built_actual_name
!= NULL
,
7229 VAR_DOMAIN
, LOC_STATIC
,
7230 &objfile
->static_psymbols
,
7231 has_loc
? addr
+ baseaddr
: (CORE_ADDR
) 0,
7232 cu
->language
, objfile
);
7235 case DW_TAG_typedef
:
7236 case DW_TAG_base_type
:
7237 case DW_TAG_subrange_type
:
7238 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7239 built_actual_name
!= NULL
,
7240 VAR_DOMAIN
, LOC_TYPEDEF
,
7241 &objfile
->static_psymbols
,
7242 0, cu
->language
, objfile
);
7244 case DW_TAG_imported_declaration
:
7245 case DW_TAG_namespace
:
7246 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7247 built_actual_name
!= NULL
,
7248 VAR_DOMAIN
, LOC_TYPEDEF
,
7249 &objfile
->global_psymbols
,
7250 0, cu
->language
, objfile
);
7253 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7254 built_actual_name
!= NULL
,
7255 MODULE_DOMAIN
, LOC_TYPEDEF
,
7256 &objfile
->global_psymbols
,
7257 0, cu
->language
, objfile
);
7259 case DW_TAG_class_type
:
7260 case DW_TAG_interface_type
:
7261 case DW_TAG_structure_type
:
7262 case DW_TAG_union_type
:
7263 case DW_TAG_enumeration_type
:
7264 /* Skip external references. The DWARF standard says in the section
7265 about "Structure, Union, and Class Type Entries": "An incomplete
7266 structure, union or class type is represented by a structure,
7267 union or class entry that does not have a byte size attribute
7268 and that has a DW_AT_declaration attribute." */
7269 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
7271 xfree (built_actual_name
);
7275 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
7276 static vs. global. */
7277 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7278 built_actual_name
!= NULL
,
7279 STRUCT_DOMAIN
, LOC_TYPEDEF
,
7280 cu
->language
== language_cplus
7281 ? &objfile
->global_psymbols
7282 : &objfile
->static_psymbols
,
7283 0, cu
->language
, objfile
);
7286 case DW_TAG_enumerator
:
7287 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7288 built_actual_name
!= NULL
,
7289 VAR_DOMAIN
, LOC_CONST
,
7290 cu
->language
== language_cplus
7291 ? &objfile
->global_psymbols
7292 : &objfile
->static_psymbols
,
7293 0, cu
->language
, objfile
);
7299 xfree (built_actual_name
);
7302 /* Read a partial die corresponding to a namespace; also, add a symbol
7303 corresponding to that namespace to the symbol table. NAMESPACE is
7304 the name of the enclosing namespace. */
7307 add_partial_namespace (struct partial_die_info
*pdi
,
7308 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7309 int set_addrmap
, struct dwarf2_cu
*cu
)
7311 /* Add a symbol for the namespace. */
7313 add_partial_symbol (pdi
, cu
);
7315 /* Now scan partial symbols in that namespace. */
7317 if (pdi
->has_children
)
7318 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7321 /* Read a partial die corresponding to a Fortran module. */
7324 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
7325 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
7327 /* Add a symbol for the namespace. */
7329 add_partial_symbol (pdi
, cu
);
7331 /* Now scan partial symbols in that module. */
7333 if (pdi
->has_children
)
7334 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7337 /* Read a partial die corresponding to a subprogram and create a partial
7338 symbol for that subprogram. When the CU language allows it, this
7339 routine also defines a partial symbol for each nested subprogram
7340 that this subprogram contains. If SET_ADDRMAP is true, record the
7341 covered ranges in the addrmap. Set *LOWPC and *HIGHPC to the lowest
7342 and highest PC values found in PDI.
7344 PDI may also be a lexical block, in which case we simply search
7345 recursively for subprograms defined inside that lexical block.
7346 Again, this is only performed when the CU language allows this
7347 type of definitions. */
7350 add_partial_subprogram (struct partial_die_info
*pdi
,
7351 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7352 int set_addrmap
, struct dwarf2_cu
*cu
)
7354 if (pdi
->tag
== DW_TAG_subprogram
)
7356 if (pdi
->has_pc_info
)
7358 if (pdi
->lowpc
< *lowpc
)
7359 *lowpc
= pdi
->lowpc
;
7360 if (pdi
->highpc
> *highpc
)
7361 *highpc
= pdi
->highpc
;
7364 struct objfile
*objfile
= cu
->objfile
;
7365 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7370 baseaddr
= ANOFFSET (objfile
->section_offsets
,
7371 SECT_OFF_TEXT (objfile
));
7372 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7373 pdi
->lowpc
+ baseaddr
);
7374 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7375 pdi
->highpc
+ baseaddr
);
7376 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
7377 cu
->per_cu
->v
.psymtab
);
7381 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
7383 if (!pdi
->is_declaration
)
7384 /* Ignore subprogram DIEs that do not have a name, they are
7385 illegal. Do not emit a complaint at this point, we will
7386 do so when we convert this psymtab into a symtab. */
7388 add_partial_symbol (pdi
, cu
);
7392 if (! pdi
->has_children
)
7395 if (cu
->language
== language_ada
)
7397 pdi
= pdi
->die_child
;
7400 fixup_partial_die (pdi
, cu
);
7401 if (pdi
->tag
== DW_TAG_subprogram
7402 || pdi
->tag
== DW_TAG_lexical_block
)
7403 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
7404 pdi
= pdi
->die_sibling
;
7409 /* Read a partial die corresponding to an enumeration type. */
7412 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
7413 struct dwarf2_cu
*cu
)
7415 struct partial_die_info
*pdi
;
7417 if (enum_pdi
->name
!= NULL
)
7418 add_partial_symbol (enum_pdi
, cu
);
7420 pdi
= enum_pdi
->die_child
;
7423 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
7424 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
7426 add_partial_symbol (pdi
, cu
);
7427 pdi
= pdi
->die_sibling
;
7431 /* Return the initial uleb128 in the die at INFO_PTR. */
7434 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
7436 unsigned int bytes_read
;
7438 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7441 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
7442 Return the corresponding abbrev, or NULL if the number is zero (indicating
7443 an empty DIE). In either case *BYTES_READ will be set to the length of
7444 the initial number. */
7446 static struct abbrev_info
*
7447 peek_die_abbrev (const gdb_byte
*info_ptr
, unsigned int *bytes_read
,
7448 struct dwarf2_cu
*cu
)
7450 bfd
*abfd
= cu
->objfile
->obfd
;
7451 unsigned int abbrev_number
;
7452 struct abbrev_info
*abbrev
;
7454 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
7456 if (abbrev_number
== 0)
7459 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
7462 error (_("Dwarf Error: Could not find abbrev number %d in %s"
7463 " at offset 0x%x [in module %s]"),
7464 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
7465 to_underlying (cu
->header
.sect_off
), bfd_get_filename (abfd
));
7471 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7472 Returns a pointer to the end of a series of DIEs, terminated by an empty
7473 DIE. Any children of the skipped DIEs will also be skipped. */
7475 static const gdb_byte
*
7476 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
7478 struct dwarf2_cu
*cu
= reader
->cu
;
7479 struct abbrev_info
*abbrev
;
7480 unsigned int bytes_read
;
7484 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
7486 return info_ptr
+ bytes_read
;
7488 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
7492 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7493 INFO_PTR should point just after the initial uleb128 of a DIE, and the
7494 abbrev corresponding to that skipped uleb128 should be passed in
7495 ABBREV. Returns a pointer to this DIE's sibling, skipping any
7498 static const gdb_byte
*
7499 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
7500 struct abbrev_info
*abbrev
)
7502 unsigned int bytes_read
;
7503 struct attribute attr
;
7504 bfd
*abfd
= reader
->abfd
;
7505 struct dwarf2_cu
*cu
= reader
->cu
;
7506 const gdb_byte
*buffer
= reader
->buffer
;
7507 const gdb_byte
*buffer_end
= reader
->buffer_end
;
7508 unsigned int form
, i
;
7510 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
7512 /* The only abbrev we care about is DW_AT_sibling. */
7513 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
7515 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
7516 if (attr
.form
== DW_FORM_ref_addr
)
7517 complaint (&symfile_complaints
,
7518 _("ignoring absolute DW_AT_sibling"));
7521 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
7522 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
7524 if (sibling_ptr
< info_ptr
)
7525 complaint (&symfile_complaints
,
7526 _("DW_AT_sibling points backwards"));
7527 else if (sibling_ptr
> reader
->buffer_end
)
7528 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
7534 /* If it isn't DW_AT_sibling, skip this attribute. */
7535 form
= abbrev
->attrs
[i
].form
;
7539 case DW_FORM_ref_addr
:
7540 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
7541 and later it is offset sized. */
7542 if (cu
->header
.version
== 2)
7543 info_ptr
+= cu
->header
.addr_size
;
7545 info_ptr
+= cu
->header
.offset_size
;
7547 case DW_FORM_GNU_ref_alt
:
7548 info_ptr
+= cu
->header
.offset_size
;
7551 info_ptr
+= cu
->header
.addr_size
;
7558 case DW_FORM_flag_present
:
7559 case DW_FORM_implicit_const
:
7571 case DW_FORM_ref_sig8
:
7574 case DW_FORM_data16
:
7577 case DW_FORM_string
:
7578 read_direct_string (abfd
, info_ptr
, &bytes_read
);
7579 info_ptr
+= bytes_read
;
7581 case DW_FORM_sec_offset
:
7583 case DW_FORM_GNU_strp_alt
:
7584 info_ptr
+= cu
->header
.offset_size
;
7586 case DW_FORM_exprloc
:
7588 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7589 info_ptr
+= bytes_read
;
7591 case DW_FORM_block1
:
7592 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
7594 case DW_FORM_block2
:
7595 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
7597 case DW_FORM_block4
:
7598 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
7602 case DW_FORM_ref_udata
:
7603 case DW_FORM_GNU_addr_index
:
7604 case DW_FORM_GNU_str_index
:
7605 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
7607 case DW_FORM_indirect
:
7608 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7609 info_ptr
+= bytes_read
;
7610 /* We need to continue parsing from here, so just go back to
7612 goto skip_attribute
;
7615 error (_("Dwarf Error: Cannot handle %s "
7616 "in DWARF reader [in module %s]"),
7617 dwarf_form_name (form
),
7618 bfd_get_filename (abfd
));
7622 if (abbrev
->has_children
)
7623 return skip_children (reader
, info_ptr
);
7628 /* Locate ORIG_PDI's sibling.
7629 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
7631 static const gdb_byte
*
7632 locate_pdi_sibling (const struct die_reader_specs
*reader
,
7633 struct partial_die_info
*orig_pdi
,
7634 const gdb_byte
*info_ptr
)
7636 /* Do we know the sibling already? */
7638 if (orig_pdi
->sibling
)
7639 return orig_pdi
->sibling
;
7641 /* Are there any children to deal with? */
7643 if (!orig_pdi
->has_children
)
7646 /* Skip the children the long way. */
7648 return skip_children (reader
, info_ptr
);
7651 /* Expand this partial symbol table into a full symbol table. SELF is
7655 dwarf2_read_symtab (struct partial_symtab
*self
,
7656 struct objfile
*objfile
)
7660 warning (_("bug: psymtab for %s is already read in."),
7667 printf_filtered (_("Reading in symbols for %s..."),
7669 gdb_flush (gdb_stdout
);
7672 /* Restore our global data. */
7674 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
7675 dwarf2_objfile_data_key
);
7677 /* If this psymtab is constructed from a debug-only objfile, the
7678 has_section_at_zero flag will not necessarily be correct. We
7679 can get the correct value for this flag by looking at the data
7680 associated with the (presumably stripped) associated objfile. */
7681 if (objfile
->separate_debug_objfile_backlink
)
7683 struct dwarf2_per_objfile
*dpo_backlink
7684 = ((struct dwarf2_per_objfile
*)
7685 objfile_data (objfile
->separate_debug_objfile_backlink
,
7686 dwarf2_objfile_data_key
));
7688 dwarf2_per_objfile
->has_section_at_zero
7689 = dpo_backlink
->has_section_at_zero
;
7692 dwarf2_per_objfile
->reading_partial_symbols
= 0;
7694 psymtab_to_symtab_1 (self
);
7696 /* Finish up the debug error message. */
7698 printf_filtered (_("done.\n"));
7701 process_cu_includes ();
7704 /* Reading in full CUs. */
7706 /* Add PER_CU to the queue. */
7709 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
7710 enum language pretend_language
)
7712 struct dwarf2_queue_item
*item
;
7715 item
= XNEW (struct dwarf2_queue_item
);
7716 item
->per_cu
= per_cu
;
7717 item
->pretend_language
= pretend_language
;
7720 if (dwarf2_queue
== NULL
)
7721 dwarf2_queue
= item
;
7723 dwarf2_queue_tail
->next
= item
;
7725 dwarf2_queue_tail
= item
;
7728 /* If PER_CU is not yet queued, add it to the queue.
7729 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
7731 The result is non-zero if PER_CU was queued, otherwise the result is zero
7732 meaning either PER_CU is already queued or it is already loaded.
7734 N.B. There is an invariant here that if a CU is queued then it is loaded.
7735 The caller is required to load PER_CU if we return non-zero. */
7738 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
7739 struct dwarf2_per_cu_data
*per_cu
,
7740 enum language pretend_language
)
7742 /* We may arrive here during partial symbol reading, if we need full
7743 DIEs to process an unusual case (e.g. template arguments). Do
7744 not queue PER_CU, just tell our caller to load its DIEs. */
7745 if (dwarf2_per_objfile
->reading_partial_symbols
)
7747 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
7752 /* Mark the dependence relation so that we don't flush PER_CU
7754 if (dependent_cu
!= NULL
)
7755 dwarf2_add_dependence (dependent_cu
, per_cu
);
7757 /* If it's already on the queue, we have nothing to do. */
7761 /* If the compilation unit is already loaded, just mark it as
7763 if (per_cu
->cu
!= NULL
)
7765 per_cu
->cu
->last_used
= 0;
7769 /* Add it to the queue. */
7770 queue_comp_unit (per_cu
, pretend_language
);
7775 /* Process the queue. */
7778 process_queue (void)
7780 struct dwarf2_queue_item
*item
, *next_item
;
7782 if (dwarf_read_debug
)
7784 fprintf_unfiltered (gdb_stdlog
,
7785 "Expanding one or more symtabs of objfile %s ...\n",
7786 objfile_name (dwarf2_per_objfile
->objfile
));
7789 /* The queue starts out with one item, but following a DIE reference
7790 may load a new CU, adding it to the end of the queue. */
7791 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
7793 if ((dwarf2_per_objfile
->using_index
7794 ? !item
->per_cu
->v
.quick
->compunit_symtab
7795 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
7796 /* Skip dummy CUs. */
7797 && item
->per_cu
->cu
!= NULL
)
7799 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
7800 unsigned int debug_print_threshold
;
7803 if (per_cu
->is_debug_types
)
7805 struct signatured_type
*sig_type
=
7806 (struct signatured_type
*) per_cu
;
7808 sprintf (buf
, "TU %s at offset 0x%x",
7809 hex_string (sig_type
->signature
),
7810 to_underlying (per_cu
->sect_off
));
7811 /* There can be 100s of TUs.
7812 Only print them in verbose mode. */
7813 debug_print_threshold
= 2;
7817 sprintf (buf
, "CU at offset 0x%x",
7818 to_underlying (per_cu
->sect_off
));
7819 debug_print_threshold
= 1;
7822 if (dwarf_read_debug
>= debug_print_threshold
)
7823 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
7825 if (per_cu
->is_debug_types
)
7826 process_full_type_unit (per_cu
, item
->pretend_language
);
7828 process_full_comp_unit (per_cu
, item
->pretend_language
);
7830 if (dwarf_read_debug
>= debug_print_threshold
)
7831 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
7834 item
->per_cu
->queued
= 0;
7835 next_item
= item
->next
;
7839 dwarf2_queue_tail
= NULL
;
7841 if (dwarf_read_debug
)
7843 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
7844 objfile_name (dwarf2_per_objfile
->objfile
));
7848 /* Free all allocated queue entries. This function only releases anything if
7849 an error was thrown; if the queue was processed then it would have been
7850 freed as we went along. */
7853 dwarf2_release_queue (void *dummy
)
7855 struct dwarf2_queue_item
*item
, *last
;
7857 item
= dwarf2_queue
;
7860 /* Anything still marked queued is likely to be in an
7861 inconsistent state, so discard it. */
7862 if (item
->per_cu
->queued
)
7864 if (item
->per_cu
->cu
!= NULL
)
7865 free_one_cached_comp_unit (item
->per_cu
);
7866 item
->per_cu
->queued
= 0;
7874 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
7877 /* Read in full symbols for PST, and anything it depends on. */
7880 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
7882 struct dwarf2_per_cu_data
*per_cu
;
7888 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
7889 if (!pst
->dependencies
[i
]->readin
7890 && pst
->dependencies
[i
]->user
== NULL
)
7892 /* Inform about additional files that need to be read in. */
7895 /* FIXME: i18n: Need to make this a single string. */
7896 fputs_filtered (" ", gdb_stdout
);
7898 fputs_filtered ("and ", gdb_stdout
);
7900 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
7901 wrap_here (""); /* Flush output. */
7902 gdb_flush (gdb_stdout
);
7904 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
7907 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
7911 /* It's an include file, no symbols to read for it.
7912 Everything is in the parent symtab. */
7917 dw2_do_instantiate_symtab (per_cu
);
7920 /* Trivial hash function for die_info: the hash value of a DIE
7921 is its offset in .debug_info for this objfile. */
7924 die_hash (const void *item
)
7926 const struct die_info
*die
= (const struct die_info
*) item
;
7928 return to_underlying (die
->sect_off
);
7931 /* Trivial comparison function for die_info structures: two DIEs
7932 are equal if they have the same offset. */
7935 die_eq (const void *item_lhs
, const void *item_rhs
)
7937 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
7938 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
7940 return die_lhs
->sect_off
== die_rhs
->sect_off
;
7943 /* die_reader_func for load_full_comp_unit.
7944 This is identical to read_signatured_type_reader,
7945 but is kept separate for now. */
7948 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
7949 const gdb_byte
*info_ptr
,
7950 struct die_info
*comp_unit_die
,
7954 struct dwarf2_cu
*cu
= reader
->cu
;
7955 enum language
*language_ptr
= (enum language
*) data
;
7957 gdb_assert (cu
->die_hash
== NULL
);
7959 htab_create_alloc_ex (cu
->header
.length
/ 12,
7963 &cu
->comp_unit_obstack
,
7964 hashtab_obstack_allocate
,
7965 dummy_obstack_deallocate
);
7968 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
7969 &info_ptr
, comp_unit_die
);
7970 cu
->dies
= comp_unit_die
;
7971 /* comp_unit_die is not stored in die_hash, no need. */
7973 /* We try not to read any attributes in this function, because not
7974 all CUs needed for references have been loaded yet, and symbol
7975 table processing isn't initialized. But we have to set the CU language,
7976 or we won't be able to build types correctly.
7977 Similarly, if we do not read the producer, we can not apply
7978 producer-specific interpretation. */
7979 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
7982 /* Load the DIEs associated with PER_CU into memory. */
7985 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
7986 enum language pretend_language
)
7988 gdb_assert (! this_cu
->is_debug_types
);
7990 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
7991 load_full_comp_unit_reader
, &pretend_language
);
7994 /* Add a DIE to the delayed physname list. */
7997 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
7998 const char *name
, struct die_info
*die
,
7999 struct dwarf2_cu
*cu
)
8001 struct delayed_method_info mi
;
8003 mi
.fnfield_index
= fnfield_index
;
8007 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
8010 /* A cleanup for freeing the delayed method list. */
8013 free_delayed_list (void *ptr
)
8015 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
8016 if (cu
->method_list
!= NULL
)
8018 VEC_free (delayed_method_info
, cu
->method_list
);
8019 cu
->method_list
= NULL
;
8023 /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like
8024 "const" / "volatile". If so, decrements LEN by the length of the
8025 modifier and return true. Otherwise return false. */
8029 check_modifier (const char *physname
, size_t &len
, const char (&mod
)[N
])
8031 size_t mod_len
= sizeof (mod
) - 1;
8032 if (len
> mod_len
&& startswith (physname
+ (len
- mod_len
), mod
))
8040 /* Compute the physnames of any methods on the CU's method list.
8042 The computation of method physnames is delayed in order to avoid the
8043 (bad) condition that one of the method's formal parameters is of an as yet
8047 compute_delayed_physnames (struct dwarf2_cu
*cu
)
8050 struct delayed_method_info
*mi
;
8052 /* Only C++ delays computing physnames. */
8053 if (VEC_empty (delayed_method_info
, cu
->method_list
))
8055 gdb_assert (cu
->language
== language_cplus
);
8057 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
8059 const char *physname
;
8060 struct fn_fieldlist
*fn_flp
8061 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
8062 physname
= dwarf2_physname (mi
->name
, mi
->die
, cu
);
8063 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
->index
)
8064 = physname
? physname
: "";
8066 /* Since there's no tag to indicate whether a method is a
8067 const/volatile overload, extract that information out of the
8069 if (physname
!= NULL
)
8071 size_t len
= strlen (physname
);
8075 if (physname
[len
] == ')') /* shortcut */
8077 else if (check_modifier (physname
, len
, " const"))
8078 TYPE_FN_FIELD_CONST (fn_flp
->fn_fields
, mi
->index
) = 1;
8079 else if (check_modifier (physname
, len
, " volatile"))
8080 TYPE_FN_FIELD_VOLATILE (fn_flp
->fn_fields
, mi
->index
) = 1;
8088 /* Go objects should be embedded in a DW_TAG_module DIE,
8089 and it's not clear if/how imported objects will appear.
8090 To keep Go support simple until that's worked out,
8091 go back through what we've read and create something usable.
8092 We could do this while processing each DIE, and feels kinda cleaner,
8093 but that way is more invasive.
8094 This is to, for example, allow the user to type "p var" or "b main"
8095 without having to specify the package name, and allow lookups
8096 of module.object to work in contexts that use the expression
8100 fixup_go_packaging (struct dwarf2_cu
*cu
)
8102 char *package_name
= NULL
;
8103 struct pending
*list
;
8106 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
8108 for (i
= 0; i
< list
->nsyms
; ++i
)
8110 struct symbol
*sym
= list
->symbol
[i
];
8112 if (SYMBOL_LANGUAGE (sym
) == language_go
8113 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
8115 char *this_package_name
= go_symbol_package_name (sym
);
8117 if (this_package_name
== NULL
)
8119 if (package_name
== NULL
)
8120 package_name
= this_package_name
;
8123 if (strcmp (package_name
, this_package_name
) != 0)
8124 complaint (&symfile_complaints
,
8125 _("Symtab %s has objects from two different Go packages: %s and %s"),
8126 (symbol_symtab (sym
) != NULL
8127 ? symtab_to_filename_for_display
8128 (symbol_symtab (sym
))
8129 : objfile_name (cu
->objfile
)),
8130 this_package_name
, package_name
);
8131 xfree (this_package_name
);
8137 if (package_name
!= NULL
)
8139 struct objfile
*objfile
= cu
->objfile
;
8140 const char *saved_package_name
8141 = (const char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8143 strlen (package_name
));
8144 struct type
*type
= init_type (objfile
, TYPE_CODE_MODULE
, 0,
8145 saved_package_name
);
8148 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
8150 sym
= allocate_symbol (objfile
);
8151 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
8152 SYMBOL_SET_NAMES (sym
, saved_package_name
,
8153 strlen (saved_package_name
), 0, objfile
);
8154 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
8155 e.g., "main" finds the "main" module and not C's main(). */
8156 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
8157 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
8158 SYMBOL_TYPE (sym
) = type
;
8160 add_symbol_to_list (sym
, &global_symbols
);
8162 xfree (package_name
);
8166 /* Return the symtab for PER_CU. This works properly regardless of
8167 whether we're using the index or psymtabs. */
8169 static struct compunit_symtab
*
8170 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
8172 return (dwarf2_per_objfile
->using_index
8173 ? per_cu
->v
.quick
->compunit_symtab
8174 : per_cu
->v
.psymtab
->compunit_symtab
);
8177 /* A helper function for computing the list of all symbol tables
8178 included by PER_CU. */
8181 recursively_compute_inclusions (VEC (compunit_symtab_ptr
) **result
,
8182 htab_t all_children
, htab_t all_type_symtabs
,
8183 struct dwarf2_per_cu_data
*per_cu
,
8184 struct compunit_symtab
*immediate_parent
)
8188 struct compunit_symtab
*cust
;
8189 struct dwarf2_per_cu_data
*iter
;
8191 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
8194 /* This inclusion and its children have been processed. */
8199 /* Only add a CU if it has a symbol table. */
8200 cust
= get_compunit_symtab (per_cu
);
8203 /* If this is a type unit only add its symbol table if we haven't
8204 seen it yet (type unit per_cu's can share symtabs). */
8205 if (per_cu
->is_debug_types
)
8207 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
8211 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
8212 if (cust
->user
== NULL
)
8213 cust
->user
= immediate_parent
;
8218 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
8219 if (cust
->user
== NULL
)
8220 cust
->user
= immediate_parent
;
8225 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
8228 recursively_compute_inclusions (result
, all_children
,
8229 all_type_symtabs
, iter
, cust
);
8233 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
8237 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
8239 gdb_assert (! per_cu
->is_debug_types
);
8241 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
8244 struct dwarf2_per_cu_data
*per_cu_iter
;
8245 struct compunit_symtab
*compunit_symtab_iter
;
8246 VEC (compunit_symtab_ptr
) *result_symtabs
= NULL
;
8247 htab_t all_children
, all_type_symtabs
;
8248 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
8250 /* If we don't have a symtab, we can just skip this case. */
8254 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
8255 NULL
, xcalloc
, xfree
);
8256 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
8257 NULL
, xcalloc
, xfree
);
8260 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
8264 recursively_compute_inclusions (&result_symtabs
, all_children
,
8265 all_type_symtabs
, per_cu_iter
,
8269 /* Now we have a transitive closure of all the included symtabs. */
8270 len
= VEC_length (compunit_symtab_ptr
, result_symtabs
);
8272 = XOBNEWVEC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
8273 struct compunit_symtab
*, len
+ 1);
8275 VEC_iterate (compunit_symtab_ptr
, result_symtabs
, ix
,
8276 compunit_symtab_iter
);
8278 cust
->includes
[ix
] = compunit_symtab_iter
;
8279 cust
->includes
[len
] = NULL
;
8281 VEC_free (compunit_symtab_ptr
, result_symtabs
);
8282 htab_delete (all_children
);
8283 htab_delete (all_type_symtabs
);
8287 /* Compute the 'includes' field for the symtabs of all the CUs we just
8291 process_cu_includes (void)
8294 struct dwarf2_per_cu_data
*iter
;
8297 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
8301 if (! iter
->is_debug_types
)
8302 compute_compunit_symtab_includes (iter
);
8305 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
8308 /* Generate full symbol information for PER_CU, whose DIEs have
8309 already been loaded into memory. */
8312 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
8313 enum language pretend_language
)
8315 struct dwarf2_cu
*cu
= per_cu
->cu
;
8316 struct objfile
*objfile
= per_cu
->objfile
;
8317 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8318 CORE_ADDR lowpc
, highpc
;
8319 struct compunit_symtab
*cust
;
8320 struct cleanup
*back_to
, *delayed_list_cleanup
;
8322 struct block
*static_block
;
8325 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8328 back_to
= make_cleanup (really_free_pendings
, NULL
);
8329 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
8331 cu
->list_in_scope
= &file_symbols
;
8333 cu
->language
= pretend_language
;
8334 cu
->language_defn
= language_def (cu
->language
);
8336 /* Do line number decoding in read_file_scope () */
8337 process_die (cu
->dies
, cu
);
8339 /* For now fudge the Go package. */
8340 if (cu
->language
== language_go
)
8341 fixup_go_packaging (cu
);
8343 /* Now that we have processed all the DIEs in the CU, all the types
8344 should be complete, and it should now be safe to compute all of the
8346 compute_delayed_physnames (cu
);
8347 do_cleanups (delayed_list_cleanup
);
8349 /* Some compilers don't define a DW_AT_high_pc attribute for the
8350 compilation unit. If the DW_AT_high_pc is missing, synthesize
8351 it, by scanning the DIE's below the compilation unit. */
8352 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
8354 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
8355 static_block
= end_symtab_get_static_block (addr
, 0, 1);
8357 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
8358 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
8359 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
8360 addrmap to help ensure it has an accurate map of pc values belonging to
8362 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
8364 cust
= end_symtab_from_static_block (static_block
,
8365 SECT_OFF_TEXT (objfile
), 0);
8369 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
8371 /* Set symtab language to language from DW_AT_language. If the
8372 compilation is from a C file generated by language preprocessors, do
8373 not set the language if it was already deduced by start_subfile. */
8374 if (!(cu
->language
== language_c
8375 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
8376 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8378 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
8379 produce DW_AT_location with location lists but it can be possibly
8380 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
8381 there were bugs in prologue debug info, fixed later in GCC-4.5
8382 by "unwind info for epilogues" patch (which is not directly related).
8384 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
8385 needed, it would be wrong due to missing DW_AT_producer there.
8387 Still one can confuse GDB by using non-standard GCC compilation
8388 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
8390 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
8391 cust
->locations_valid
= 1;
8393 if (gcc_4_minor
>= 5)
8394 cust
->epilogue_unwind_valid
= 1;
8396 cust
->call_site_htab
= cu
->call_site_htab
;
8399 if (dwarf2_per_objfile
->using_index
)
8400 per_cu
->v
.quick
->compunit_symtab
= cust
;
8403 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8404 pst
->compunit_symtab
= cust
;
8408 /* Push it for inclusion processing later. */
8409 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
8411 do_cleanups (back_to
);
8414 /* Generate full symbol information for type unit PER_CU, whose DIEs have
8415 already been loaded into memory. */
8418 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
8419 enum language pretend_language
)
8421 struct dwarf2_cu
*cu
= per_cu
->cu
;
8422 struct objfile
*objfile
= per_cu
->objfile
;
8423 struct compunit_symtab
*cust
;
8424 struct cleanup
*back_to
, *delayed_list_cleanup
;
8425 struct signatured_type
*sig_type
;
8427 gdb_assert (per_cu
->is_debug_types
);
8428 sig_type
= (struct signatured_type
*) per_cu
;
8431 back_to
= make_cleanup (really_free_pendings
, NULL
);
8432 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
8434 cu
->list_in_scope
= &file_symbols
;
8436 cu
->language
= pretend_language
;
8437 cu
->language_defn
= language_def (cu
->language
);
8439 /* The symbol tables are set up in read_type_unit_scope. */
8440 process_die (cu
->dies
, cu
);
8442 /* For now fudge the Go package. */
8443 if (cu
->language
== language_go
)
8444 fixup_go_packaging (cu
);
8446 /* Now that we have processed all the DIEs in the CU, all the types
8447 should be complete, and it should now be safe to compute all of the
8449 compute_delayed_physnames (cu
);
8450 do_cleanups (delayed_list_cleanup
);
8452 /* TUs share symbol tables.
8453 If this is the first TU to use this symtab, complete the construction
8454 of it with end_expandable_symtab. Otherwise, complete the addition of
8455 this TU's symbols to the existing symtab. */
8456 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
8458 cust
= end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
8459 sig_type
->type_unit_group
->compunit_symtab
= cust
;
8463 /* Set symtab language to language from DW_AT_language. If the
8464 compilation is from a C file generated by language preprocessors,
8465 do not set the language if it was already deduced by
8467 if (!(cu
->language
== language_c
8468 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
8469 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8474 augment_type_symtab ();
8475 cust
= sig_type
->type_unit_group
->compunit_symtab
;
8478 if (dwarf2_per_objfile
->using_index
)
8479 per_cu
->v
.quick
->compunit_symtab
= cust
;
8482 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8483 pst
->compunit_symtab
= cust
;
8487 do_cleanups (back_to
);
8490 /* Process an imported unit DIE. */
8493 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8495 struct attribute
*attr
;
8497 /* For now we don't handle imported units in type units. */
8498 if (cu
->per_cu
->is_debug_types
)
8500 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8501 " supported in type units [in module %s]"),
8502 objfile_name (cu
->objfile
));
8505 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8508 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
8509 bool is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
8510 dwarf2_per_cu_data
*per_cu
8511 = dwarf2_find_containing_comp_unit (sect_off
, is_dwz
, cu
->objfile
);
8513 /* If necessary, add it to the queue and load its DIEs. */
8514 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
8515 load_full_comp_unit (per_cu
, cu
->language
);
8517 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
8522 /* RAII object that represents a process_die scope: i.e.,
8523 starts/finishes processing a DIE. */
8524 class process_die_scope
8527 process_die_scope (die_info
*die
, dwarf2_cu
*cu
)
8528 : m_die (die
), m_cu (cu
)
8530 /* We should only be processing DIEs not already in process. */
8531 gdb_assert (!m_die
->in_process
);
8532 m_die
->in_process
= true;
8535 ~process_die_scope ()
8537 m_die
->in_process
= false;
8539 /* If we're done processing the DIE for the CU that owns the line
8540 header, we don't need the line header anymore. */
8541 if (m_cu
->line_header_die_owner
== m_die
)
8543 delete m_cu
->line_header
;
8544 m_cu
->line_header
= NULL
;
8545 m_cu
->line_header_die_owner
= NULL
;
8554 /* Process a die and its children. */
8557 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8559 process_die_scope
scope (die
, cu
);
8563 case DW_TAG_padding
:
8565 case DW_TAG_compile_unit
:
8566 case DW_TAG_partial_unit
:
8567 read_file_scope (die
, cu
);
8569 case DW_TAG_type_unit
:
8570 read_type_unit_scope (die
, cu
);
8572 case DW_TAG_subprogram
:
8573 case DW_TAG_inlined_subroutine
:
8574 read_func_scope (die
, cu
);
8576 case DW_TAG_lexical_block
:
8577 case DW_TAG_try_block
:
8578 case DW_TAG_catch_block
:
8579 read_lexical_block_scope (die
, cu
);
8581 case DW_TAG_call_site
:
8582 case DW_TAG_GNU_call_site
:
8583 read_call_site_scope (die
, cu
);
8585 case DW_TAG_class_type
:
8586 case DW_TAG_interface_type
:
8587 case DW_TAG_structure_type
:
8588 case DW_TAG_union_type
:
8589 process_structure_scope (die
, cu
);
8591 case DW_TAG_enumeration_type
:
8592 process_enumeration_scope (die
, cu
);
8595 /* These dies have a type, but processing them does not create
8596 a symbol or recurse to process the children. Therefore we can
8597 read them on-demand through read_type_die. */
8598 case DW_TAG_subroutine_type
:
8599 case DW_TAG_set_type
:
8600 case DW_TAG_array_type
:
8601 case DW_TAG_pointer_type
:
8602 case DW_TAG_ptr_to_member_type
:
8603 case DW_TAG_reference_type
:
8604 case DW_TAG_rvalue_reference_type
:
8605 case DW_TAG_string_type
:
8608 case DW_TAG_base_type
:
8609 case DW_TAG_subrange_type
:
8610 case DW_TAG_typedef
:
8611 /* Add a typedef symbol for the type definition, if it has a
8613 new_symbol (die
, read_type_die (die
, cu
), cu
);
8615 case DW_TAG_common_block
:
8616 read_common_block (die
, cu
);
8618 case DW_TAG_common_inclusion
:
8620 case DW_TAG_namespace
:
8621 cu
->processing_has_namespace_info
= 1;
8622 read_namespace (die
, cu
);
8625 cu
->processing_has_namespace_info
= 1;
8626 read_module (die
, cu
);
8628 case DW_TAG_imported_declaration
:
8629 cu
->processing_has_namespace_info
= 1;
8630 if (read_namespace_alias (die
, cu
))
8632 /* The declaration is not a global namespace alias: fall through. */
8633 case DW_TAG_imported_module
:
8634 cu
->processing_has_namespace_info
= 1;
8635 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
8636 || cu
->language
!= language_fortran
))
8637 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
8638 dwarf_tag_name (die
->tag
));
8639 read_import_statement (die
, cu
);
8642 case DW_TAG_imported_unit
:
8643 process_imported_unit_die (die
, cu
);
8647 new_symbol (die
, NULL
, cu
);
8652 /* DWARF name computation. */
8654 /* A helper function for dwarf2_compute_name which determines whether DIE
8655 needs to have the name of the scope prepended to the name listed in the
8659 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
8661 struct attribute
*attr
;
8665 case DW_TAG_namespace
:
8666 case DW_TAG_typedef
:
8667 case DW_TAG_class_type
:
8668 case DW_TAG_interface_type
:
8669 case DW_TAG_structure_type
:
8670 case DW_TAG_union_type
:
8671 case DW_TAG_enumeration_type
:
8672 case DW_TAG_enumerator
:
8673 case DW_TAG_subprogram
:
8674 case DW_TAG_inlined_subroutine
:
8676 case DW_TAG_imported_declaration
:
8679 case DW_TAG_variable
:
8680 case DW_TAG_constant
:
8681 /* We only need to prefix "globally" visible variables. These include
8682 any variable marked with DW_AT_external or any variable that
8683 lives in a namespace. [Variables in anonymous namespaces
8684 require prefixing, but they are not DW_AT_external.] */
8686 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
8688 struct dwarf2_cu
*spec_cu
= cu
;
8690 return die_needs_namespace (die_specification (die
, &spec_cu
),
8694 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
8695 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
8696 && die
->parent
->tag
!= DW_TAG_module
)
8698 /* A variable in a lexical block of some kind does not need a
8699 namespace, even though in C++ such variables may be external
8700 and have a mangled name. */
8701 if (die
->parent
->tag
== DW_TAG_lexical_block
8702 || die
->parent
->tag
== DW_TAG_try_block
8703 || die
->parent
->tag
== DW_TAG_catch_block
8704 || die
->parent
->tag
== DW_TAG_subprogram
)
8713 /* Return the DIE's linkage name attribute, either DW_AT_linkage_name
8714 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
8715 defined for the given DIE. */
8717 static struct attribute
*
8718 dw2_linkage_name_attr (struct die_info
*die
, struct dwarf2_cu
*cu
)
8720 struct attribute
*attr
;
8722 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
8724 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8729 /* Return the DIE's linkage name as a string, either DW_AT_linkage_name
8730 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
8731 defined for the given DIE. */
8734 dw2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
8736 const char *linkage_name
;
8738 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
8739 if (linkage_name
== NULL
)
8740 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8742 return linkage_name
;
8745 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
8746 compute the physname for the object, which include a method's:
8747 - formal parameters (C++),
8748 - receiver type (Go),
8750 The term "physname" is a bit confusing.
8751 For C++, for example, it is the demangled name.
8752 For Go, for example, it's the mangled name.
8754 For Ada, return the DIE's linkage name rather than the fully qualified
8755 name. PHYSNAME is ignored..
8757 The result is allocated on the objfile_obstack and canonicalized. */
8760 dwarf2_compute_name (const char *name
,
8761 struct die_info
*die
, struct dwarf2_cu
*cu
,
8764 struct objfile
*objfile
= cu
->objfile
;
8767 name
= dwarf2_name (die
, cu
);
8769 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
8770 but otherwise compute it by typename_concat inside GDB.
8771 FIXME: Actually this is not really true, or at least not always true.
8772 It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle
8773 Fortran names because there is no mangling standard. So new_symbol_full
8774 will set the demangled name to the result of dwarf2_full_name, and it is
8775 the demangled name that GDB uses if it exists. */
8776 if (cu
->language
== language_ada
8777 || (cu
->language
== language_fortran
&& physname
))
8779 /* For Ada unit, we prefer the linkage name over the name, as
8780 the former contains the exported name, which the user expects
8781 to be able to reference. Ideally, we want the user to be able
8782 to reference this entity using either natural or linkage name,
8783 but we haven't started looking at this enhancement yet. */
8784 const char *linkage_name
= dw2_linkage_name (die
, cu
);
8786 if (linkage_name
!= NULL
)
8787 return linkage_name
;
8790 /* These are the only languages we know how to qualify names in. */
8792 && (cu
->language
== language_cplus
8793 || cu
->language
== language_fortran
|| cu
->language
== language_d
8794 || cu
->language
== language_rust
))
8796 if (die_needs_namespace (die
, cu
))
8800 const char *canonical_name
= NULL
;
8804 prefix
= determine_prefix (die
, cu
);
8805 if (*prefix
!= '\0')
8807 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
8810 buf
.puts (prefixed_name
);
8811 xfree (prefixed_name
);
8816 /* Template parameters may be specified in the DIE's DW_AT_name, or
8817 as children with DW_TAG_template_type_param or
8818 DW_TAG_value_type_param. If the latter, add them to the name
8819 here. If the name already has template parameters, then
8820 skip this step; some versions of GCC emit both, and
8821 it is more efficient to use the pre-computed name.
8823 Something to keep in mind about this process: it is very
8824 unlikely, or in some cases downright impossible, to produce
8825 something that will match the mangled name of a function.
8826 If the definition of the function has the same debug info,
8827 we should be able to match up with it anyway. But fallbacks
8828 using the minimal symbol, for instance to find a method
8829 implemented in a stripped copy of libstdc++, will not work.
8830 If we do not have debug info for the definition, we will have to
8831 match them up some other way.
8833 When we do name matching there is a related problem with function
8834 templates; two instantiated function templates are allowed to
8835 differ only by their return types, which we do not add here. */
8837 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
8839 struct attribute
*attr
;
8840 struct die_info
*child
;
8843 die
->building_fullname
= 1;
8845 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
8849 const gdb_byte
*bytes
;
8850 struct dwarf2_locexpr_baton
*baton
;
8853 if (child
->tag
!= DW_TAG_template_type_param
8854 && child
->tag
!= DW_TAG_template_value_param
)
8865 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
8868 complaint (&symfile_complaints
,
8869 _("template parameter missing DW_AT_type"));
8870 buf
.puts ("UNKNOWN_TYPE");
8873 type
= die_type (child
, cu
);
8875 if (child
->tag
== DW_TAG_template_type_param
)
8877 c_print_type (type
, "", &buf
, -1, 0, &type_print_raw_options
);
8881 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
8884 complaint (&symfile_complaints
,
8885 _("template parameter missing "
8886 "DW_AT_const_value"));
8887 buf
.puts ("UNKNOWN_VALUE");
8891 dwarf2_const_value_attr (attr
, type
, name
,
8892 &cu
->comp_unit_obstack
, cu
,
8893 &value
, &bytes
, &baton
);
8895 if (TYPE_NOSIGN (type
))
8896 /* GDB prints characters as NUMBER 'CHAR'. If that's
8897 changed, this can use value_print instead. */
8898 c_printchar (value
, type
, &buf
);
8901 struct value_print_options opts
;
8904 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
8908 else if (bytes
!= NULL
)
8910 v
= allocate_value (type
);
8911 memcpy (value_contents_writeable (v
), bytes
,
8912 TYPE_LENGTH (type
));
8915 v
= value_from_longest (type
, value
);
8917 /* Specify decimal so that we do not depend on
8919 get_formatted_print_options (&opts
, 'd');
8921 value_print (v
, &buf
, &opts
);
8927 die
->building_fullname
= 0;
8931 /* Close the argument list, with a space if necessary
8932 (nested templates). */
8933 if (!buf
.empty () && buf
.string ().back () == '>')
8940 /* For C++ methods, append formal parameter type
8941 information, if PHYSNAME. */
8943 if (physname
&& die
->tag
== DW_TAG_subprogram
8944 && cu
->language
== language_cplus
)
8946 struct type
*type
= read_type_die (die
, cu
);
8948 c_type_print_args (type
, &buf
, 1, cu
->language
,
8949 &type_print_raw_options
);
8951 if (cu
->language
== language_cplus
)
8953 /* Assume that an artificial first parameter is
8954 "this", but do not crash if it is not. RealView
8955 marks unnamed (and thus unused) parameters as
8956 artificial; there is no way to differentiate
8958 if (TYPE_NFIELDS (type
) > 0
8959 && TYPE_FIELD_ARTIFICIAL (type
, 0)
8960 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
8961 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
8963 buf
.puts (" const");
8967 const std::string
&intermediate_name
= buf
.string ();
8969 if (cu
->language
== language_cplus
)
8971 = dwarf2_canonicalize_name (intermediate_name
.c_str (), cu
,
8972 &objfile
->per_bfd
->storage_obstack
);
8974 /* If we only computed INTERMEDIATE_NAME, or if
8975 INTERMEDIATE_NAME is already canonical, then we need to
8976 copy it to the appropriate obstack. */
8977 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
.c_str ())
8978 name
= ((const char *)
8979 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8980 intermediate_name
.c_str (),
8981 intermediate_name
.length ()));
8983 name
= canonical_name
;
8990 /* Return the fully qualified name of DIE, based on its DW_AT_name.
8991 If scope qualifiers are appropriate they will be added. The result
8992 will be allocated on the storage_obstack, or NULL if the DIE does
8993 not have a name. NAME may either be from a previous call to
8994 dwarf2_name or NULL.
8996 The output string will be canonicalized (if C++). */
8999 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
9001 return dwarf2_compute_name (name
, die
, cu
, 0);
9004 /* Construct a physname for the given DIE in CU. NAME may either be
9005 from a previous call to dwarf2_name or NULL. The result will be
9006 allocated on the objfile_objstack or NULL if the DIE does not have a
9009 The output string will be canonicalized (if C++). */
9012 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
9014 struct objfile
*objfile
= cu
->objfile
;
9015 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
9018 /* In this case dwarf2_compute_name is just a shortcut not building anything
9020 if (!die_needs_namespace (die
, cu
))
9021 return dwarf2_compute_name (name
, die
, cu
, 1);
9023 mangled
= dw2_linkage_name (die
, cu
);
9025 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
9026 See https://github.com/rust-lang/rust/issues/32925. */
9027 if (cu
->language
== language_rust
&& mangled
!= NULL
9028 && strchr (mangled
, '{') != NULL
)
9031 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
9033 gdb::unique_xmalloc_ptr
<char> demangled
;
9034 if (mangled
!= NULL
)
9036 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
9037 type. It is easier for GDB users to search for such functions as
9038 `name(params)' than `long name(params)'. In such case the minimal
9039 symbol names do not match the full symbol names but for template
9040 functions there is never a need to look up their definition from their
9041 declaration so the only disadvantage remains the minimal symbol
9042 variant `long name(params)' does not have the proper inferior type.
9045 if (cu
->language
== language_go
)
9047 /* This is a lie, but we already lie to the caller new_symbol_full.
9048 new_symbol_full assumes we return the mangled name.
9049 This just undoes that lie until things are cleaned up. */
9053 demangled
.reset (gdb_demangle (mangled
,
9054 (DMGL_PARAMS
| DMGL_ANSI
9058 canon
= demangled
.get ();
9066 if (canon
== NULL
|| check_physname
)
9068 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
9070 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
9072 /* It may not mean a bug in GDB. The compiler could also
9073 compute DW_AT_linkage_name incorrectly. But in such case
9074 GDB would need to be bug-to-bug compatible. */
9076 complaint (&symfile_complaints
,
9077 _("Computed physname <%s> does not match demangled <%s> "
9078 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
9079 physname
, canon
, mangled
, to_underlying (die
->sect_off
),
9080 objfile_name (objfile
));
9082 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
9083 is available here - over computed PHYSNAME. It is safer
9084 against both buggy GDB and buggy compilers. */
9098 retval
= ((const char *)
9099 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
9100 retval
, strlen (retval
)));
9105 /* Inspect DIE in CU for a namespace alias. If one exists, record
9106 a new symbol for it.
9108 Returns 1 if a namespace alias was recorded, 0 otherwise. */
9111 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
9113 struct attribute
*attr
;
9115 /* If the die does not have a name, this is not a namespace
9117 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
9121 struct die_info
*d
= die
;
9122 struct dwarf2_cu
*imported_cu
= cu
;
9124 /* If the compiler has nested DW_AT_imported_declaration DIEs,
9125 keep inspecting DIEs until we hit the underlying import. */
9126 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
9127 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
9129 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
9133 d
= follow_die_ref (d
, attr
, &imported_cu
);
9134 if (d
->tag
!= DW_TAG_imported_declaration
)
9138 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
9140 complaint (&symfile_complaints
,
9141 _("DIE at 0x%x has too many recursively imported "
9142 "declarations"), to_underlying (d
->sect_off
));
9149 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
9151 type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
9152 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
9154 /* This declaration is a global namespace alias. Add
9155 a symbol for it whose type is the aliased namespace. */
9156 new_symbol (die
, type
, cu
);
9165 /* Return the using directives repository (global or local?) to use in the
9166 current context for LANGUAGE.
9168 For Ada, imported declarations can materialize renamings, which *may* be
9169 global. However it is impossible (for now?) in DWARF to distinguish
9170 "external" imported declarations and "static" ones. As all imported
9171 declarations seem to be static in all other languages, make them all CU-wide
9172 global only in Ada. */
9174 static struct using_direct
**
9175 using_directives (enum language language
)
9177 if (language
== language_ada
&& context_stack_depth
== 0)
9178 return &global_using_directives
;
9180 return &local_using_directives
;
9183 /* Read the import statement specified by the given die and record it. */
9186 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
9188 struct objfile
*objfile
= cu
->objfile
;
9189 struct attribute
*import_attr
;
9190 struct die_info
*imported_die
, *child_die
;
9191 struct dwarf2_cu
*imported_cu
;
9192 const char *imported_name
;
9193 const char *imported_name_prefix
;
9194 const char *canonical_name
;
9195 const char *import_alias
;
9196 const char *imported_declaration
= NULL
;
9197 const char *import_prefix
;
9198 std::vector
<const char *> excludes
;
9200 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
9201 if (import_attr
== NULL
)
9203 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
9204 dwarf_tag_name (die
->tag
));
9209 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
9210 imported_name
= dwarf2_name (imported_die
, imported_cu
);
9211 if (imported_name
== NULL
)
9213 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
9215 The import in the following code:
9229 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
9230 <52> DW_AT_decl_file : 1
9231 <53> DW_AT_decl_line : 6
9232 <54> DW_AT_import : <0x75>
9233 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
9235 <5b> DW_AT_decl_file : 1
9236 <5c> DW_AT_decl_line : 2
9237 <5d> DW_AT_type : <0x6e>
9239 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
9240 <76> DW_AT_byte_size : 4
9241 <77> DW_AT_encoding : 5 (signed)
9243 imports the wrong die ( 0x75 instead of 0x58 ).
9244 This case will be ignored until the gcc bug is fixed. */
9248 /* Figure out the local name after import. */
9249 import_alias
= dwarf2_name (die
, cu
);
9251 /* Figure out where the statement is being imported to. */
9252 import_prefix
= determine_prefix (die
, cu
);
9254 /* Figure out what the scope of the imported die is and prepend it
9255 to the name of the imported die. */
9256 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
9258 if (imported_die
->tag
!= DW_TAG_namespace
9259 && imported_die
->tag
!= DW_TAG_module
)
9261 imported_declaration
= imported_name
;
9262 canonical_name
= imported_name_prefix
;
9264 else if (strlen (imported_name_prefix
) > 0)
9265 canonical_name
= obconcat (&objfile
->objfile_obstack
,
9266 imported_name_prefix
,
9267 (cu
->language
== language_d
? "." : "::"),
9268 imported_name
, (char *) NULL
);
9270 canonical_name
= imported_name
;
9272 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
9273 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
9274 child_die
= sibling_die (child_die
))
9276 /* DWARF-4: A Fortran use statement with a “rename list” may be
9277 represented by an imported module entry with an import attribute
9278 referring to the module and owned entries corresponding to those
9279 entities that are renamed as part of being imported. */
9281 if (child_die
->tag
!= DW_TAG_imported_declaration
)
9283 complaint (&symfile_complaints
,
9284 _("child DW_TAG_imported_declaration expected "
9285 "- DIE at 0x%x [in module %s]"),
9286 to_underlying (child_die
->sect_off
), objfile_name (objfile
));
9290 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
9291 if (import_attr
== NULL
)
9293 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
9294 dwarf_tag_name (child_die
->tag
));
9299 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
9301 imported_name
= dwarf2_name (imported_die
, imported_cu
);
9302 if (imported_name
== NULL
)
9304 complaint (&symfile_complaints
,
9305 _("child DW_TAG_imported_declaration has unknown "
9306 "imported name - DIE at 0x%x [in module %s]"),
9307 to_underlying (child_die
->sect_off
), objfile_name (objfile
));
9311 excludes
.push_back (imported_name
);
9313 process_die (child_die
, cu
);
9316 add_using_directive (using_directives (cu
->language
),
9320 imported_declaration
,
9323 &objfile
->objfile_obstack
);
9326 /* ICC<14 does not output the required DW_AT_declaration on incomplete
9327 types, but gives them a size of zero. Starting with version 14,
9328 ICC is compatible with GCC. */
9331 producer_is_icc_lt_14 (struct dwarf2_cu
*cu
)
9333 if (!cu
->checked_producer
)
9334 check_producer (cu
);
9336 return cu
->producer_is_icc_lt_14
;
9339 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
9340 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
9341 this, it was first present in GCC release 4.3.0. */
9344 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
9346 if (!cu
->checked_producer
)
9347 check_producer (cu
);
9349 return cu
->producer_is_gcc_lt_4_3
;
9352 static file_and_directory
9353 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
)
9355 file_and_directory res
;
9357 /* Find the filename. Do not use dwarf2_name here, since the filename
9358 is not a source language identifier. */
9359 res
.name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
9360 res
.comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
9362 if (res
.comp_dir
== NULL
9363 && producer_is_gcc_lt_4_3 (cu
) && res
.name
!= NULL
9364 && IS_ABSOLUTE_PATH (res
.name
))
9366 res
.comp_dir_storage
= ldirname (res
.name
);
9367 if (!res
.comp_dir_storage
.empty ())
9368 res
.comp_dir
= res
.comp_dir_storage
.c_str ();
9370 if (res
.comp_dir
!= NULL
)
9372 /* Irix 6.2 native cc prepends <machine>.: to the compilation
9373 directory, get rid of it. */
9374 const char *cp
= strchr (res
.comp_dir
, ':');
9376 if (cp
&& cp
!= res
.comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
9377 res
.comp_dir
= cp
+ 1;
9380 if (res
.name
== NULL
)
9381 res
.name
= "<unknown>";
9386 /* Handle DW_AT_stmt_list for a compilation unit.
9387 DIE is the DW_TAG_compile_unit die for CU.
9388 COMP_DIR is the compilation directory. LOWPC is passed to
9389 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
9392 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
9393 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
9395 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9396 struct attribute
*attr
;
9397 struct line_header line_header_local
;
9398 hashval_t line_header_local_hash
;
9403 gdb_assert (! cu
->per_cu
->is_debug_types
);
9405 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9409 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
9411 /* The line header hash table is only created if needed (it exists to
9412 prevent redundant reading of the line table for partial_units).
9413 If we're given a partial_unit, we'll need it. If we're given a
9414 compile_unit, then use the line header hash table if it's already
9415 created, but don't create one just yet. */
9417 if (dwarf2_per_objfile
->line_header_hash
== NULL
9418 && die
->tag
== DW_TAG_partial_unit
)
9420 dwarf2_per_objfile
->line_header_hash
9421 = htab_create_alloc_ex (127, line_header_hash_voidp
,
9422 line_header_eq_voidp
,
9423 free_line_header_voidp
,
9424 &objfile
->objfile_obstack
,
9425 hashtab_obstack_allocate
,
9426 dummy_obstack_deallocate
);
9429 line_header_local
.sect_off
= line_offset
;
9430 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
9431 line_header_local_hash
= line_header_hash (&line_header_local
);
9432 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
9434 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
9436 line_header_local_hash
, NO_INSERT
);
9438 /* For DW_TAG_compile_unit we need info like symtab::linetable which
9439 is not present in *SLOT (since if there is something in *SLOT then
9440 it will be for a partial_unit). */
9441 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
9443 gdb_assert (*slot
!= NULL
);
9444 cu
->line_header
= (struct line_header
*) *slot
;
9449 /* dwarf_decode_line_header does not yet provide sufficient information.
9450 We always have to call also dwarf_decode_lines for it. */
9451 line_header_up lh
= dwarf_decode_line_header (line_offset
, cu
);
9455 cu
->line_header
= lh
.release ();
9456 cu
->line_header_die_owner
= die
;
9458 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
9462 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
9464 line_header_local_hash
, INSERT
);
9465 gdb_assert (slot
!= NULL
);
9467 if (slot
!= NULL
&& *slot
== NULL
)
9469 /* This newly decoded line number information unit will be owned
9470 by line_header_hash hash table. */
9471 *slot
= cu
->line_header
;
9472 cu
->line_header_die_owner
= NULL
;
9476 /* We cannot free any current entry in (*slot) as that struct line_header
9477 may be already used by multiple CUs. Create only temporary decoded
9478 line_header for this CU - it may happen at most once for each line
9479 number information unit. And if we're not using line_header_hash
9480 then this is what we want as well. */
9481 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
9483 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
9484 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
9489 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
9492 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9494 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9495 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9496 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
9497 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
9498 struct attribute
*attr
;
9499 struct die_info
*child_die
;
9502 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9504 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
9506 /* If we didn't find a lowpc, set it to highpc to avoid complaints
9507 from finish_block. */
9508 if (lowpc
== ((CORE_ADDR
) -1))
9510 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
9512 file_and_directory fnd
= find_file_and_directory (die
, cu
);
9514 prepare_one_comp_unit (cu
, die
, cu
->language
);
9516 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
9517 standardised yet. As a workaround for the language detection we fall
9518 back to the DW_AT_producer string. */
9519 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
9520 cu
->language
= language_opencl
;
9522 /* Similar hack for Go. */
9523 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
9524 set_cu_language (DW_LANG_Go
, cu
);
9526 dwarf2_start_symtab (cu
, fnd
.name
, fnd
.comp_dir
, lowpc
);
9528 /* Decode line number information if present. We do this before
9529 processing child DIEs, so that the line header table is available
9530 for DW_AT_decl_file. */
9531 handle_DW_AT_stmt_list (die
, cu
, fnd
.comp_dir
, lowpc
);
9533 /* Process all dies in compilation unit. */
9534 if (die
->child
!= NULL
)
9536 child_die
= die
->child
;
9537 while (child_die
&& child_die
->tag
)
9539 process_die (child_die
, cu
);
9540 child_die
= sibling_die (child_die
);
9544 /* Decode macro information, if present. Dwarf 2 macro information
9545 refers to information in the line number info statement program
9546 header, so we can only read it if we've read the header
9548 attr
= dwarf2_attr (die
, DW_AT_macros
, cu
);
9550 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
9551 if (attr
&& cu
->line_header
)
9553 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
9554 complaint (&symfile_complaints
,
9555 _("CU refers to both DW_AT_macros and DW_AT_macro_info"));
9557 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
9561 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
9562 if (attr
&& cu
->line_header
)
9564 unsigned int macro_offset
= DW_UNSND (attr
);
9566 dwarf_decode_macros (cu
, macro_offset
, 0);
9571 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
9572 Create the set of symtabs used by this TU, or if this TU is sharing
9573 symtabs with another TU and the symtabs have already been created
9574 then restore those symtabs in the line header.
9575 We don't need the pc/line-number mapping for type units. */
9578 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
9580 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
9581 struct type_unit_group
*tu_group
;
9583 struct attribute
*attr
;
9585 struct signatured_type
*sig_type
;
9587 gdb_assert (per_cu
->is_debug_types
);
9588 sig_type
= (struct signatured_type
*) per_cu
;
9590 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9592 /* If we're using .gdb_index (includes -readnow) then
9593 per_cu->type_unit_group may not have been set up yet. */
9594 if (sig_type
->type_unit_group
== NULL
)
9595 sig_type
->type_unit_group
= get_type_unit_group (cu
, attr
);
9596 tu_group
= sig_type
->type_unit_group
;
9598 /* If we've already processed this stmt_list there's no real need to
9599 do it again, we could fake it and just recreate the part we need
9600 (file name,index -> symtab mapping). If data shows this optimization
9601 is useful we can do it then. */
9602 first_time
= tu_group
->compunit_symtab
== NULL
;
9604 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
9609 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
9610 lh
= dwarf_decode_line_header (line_offset
, cu
);
9615 dwarf2_start_symtab (cu
, "", NULL
, 0);
9618 gdb_assert (tu_group
->symtabs
== NULL
);
9619 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9624 cu
->line_header
= lh
.release ();
9625 cu
->line_header_die_owner
= die
;
9629 struct compunit_symtab
*cust
= dwarf2_start_symtab (cu
, "", NULL
, 0);
9631 /* Note: We don't assign tu_group->compunit_symtab yet because we're
9632 still initializing it, and our caller (a few levels up)
9633 process_full_type_unit still needs to know if this is the first
9636 tu_group
->num_symtabs
= cu
->line_header
->file_names
.size ();
9637 tu_group
->symtabs
= XNEWVEC (struct symtab
*,
9638 cu
->line_header
->file_names
.size ());
9640 for (i
= 0; i
< cu
->line_header
->file_names
.size (); ++i
)
9642 file_entry
&fe
= cu
->line_header
->file_names
[i
];
9644 dwarf2_start_subfile (fe
.name
, fe
.include_dir (cu
->line_header
));
9646 if (current_subfile
->symtab
== NULL
)
9648 /* NOTE: start_subfile will recognize when it's been
9649 passed a file it has already seen. So we can't
9650 assume there's a simple mapping from
9651 cu->line_header->file_names to subfiles, plus
9652 cu->line_header->file_names may contain dups. */
9653 current_subfile
->symtab
9654 = allocate_symtab (cust
, current_subfile
->name
);
9657 fe
.symtab
= current_subfile
->symtab
;
9658 tu_group
->symtabs
[i
] = fe
.symtab
;
9663 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9665 for (i
= 0; i
< cu
->line_header
->file_names
.size (); ++i
)
9667 file_entry
&fe
= cu
->line_header
->file_names
[i
];
9669 fe
.symtab
= tu_group
->symtabs
[i
];
9673 /* The main symtab is allocated last. Type units don't have DW_AT_name
9674 so they don't have a "real" (so to speak) symtab anyway.
9675 There is later code that will assign the main symtab to all symbols
9676 that don't have one. We need to handle the case of a symbol with a
9677 missing symtab (DW_AT_decl_file) anyway. */
9680 /* Process DW_TAG_type_unit.
9681 For TUs we want to skip the first top level sibling if it's not the
9682 actual type being defined by this TU. In this case the first top
9683 level sibling is there to provide context only. */
9686 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9688 struct die_info
*child_die
;
9690 prepare_one_comp_unit (cu
, die
, language_minimal
);
9692 /* Initialize (or reinitialize) the machinery for building symtabs.
9693 We do this before processing child DIEs, so that the line header table
9694 is available for DW_AT_decl_file. */
9695 setup_type_unit_groups (die
, cu
);
9697 if (die
->child
!= NULL
)
9699 child_die
= die
->child
;
9700 while (child_die
&& child_die
->tag
)
9702 process_die (child_die
, cu
);
9703 child_die
= sibling_die (child_die
);
9710 http://gcc.gnu.org/wiki/DebugFission
9711 http://gcc.gnu.org/wiki/DebugFissionDWP
9713 To simplify handling of both DWO files ("object" files with the DWARF info)
9714 and DWP files (a file with the DWOs packaged up into one file), we treat
9715 DWP files as having a collection of virtual DWO files. */
9718 hash_dwo_file (const void *item
)
9720 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
9723 hash
= htab_hash_string (dwo_file
->dwo_name
);
9724 if (dwo_file
->comp_dir
!= NULL
)
9725 hash
+= htab_hash_string (dwo_file
->comp_dir
);
9730 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
9732 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
9733 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
9735 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
9737 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
9738 return lhs
->comp_dir
== rhs
->comp_dir
;
9739 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
9742 /* Allocate a hash table for DWO files. */
9745 allocate_dwo_file_hash_table (void)
9747 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9749 return htab_create_alloc_ex (41,
9753 &objfile
->objfile_obstack
,
9754 hashtab_obstack_allocate
,
9755 dummy_obstack_deallocate
);
9758 /* Lookup DWO file DWO_NAME. */
9761 lookup_dwo_file_slot (const char *dwo_name
, const char *comp_dir
)
9763 struct dwo_file find_entry
;
9766 if (dwarf2_per_objfile
->dwo_files
== NULL
)
9767 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
9769 memset (&find_entry
, 0, sizeof (find_entry
));
9770 find_entry
.dwo_name
= dwo_name
;
9771 find_entry
.comp_dir
= comp_dir
;
9772 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
9778 hash_dwo_unit (const void *item
)
9780 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
9782 /* This drops the top 32 bits of the id, but is ok for a hash. */
9783 return dwo_unit
->signature
;
9787 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
9789 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
9790 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
9792 /* The signature is assumed to be unique within the DWO file.
9793 So while object file CU dwo_id's always have the value zero,
9794 that's OK, assuming each object file DWO file has only one CU,
9795 and that's the rule for now. */
9796 return lhs
->signature
== rhs
->signature
;
9799 /* Allocate a hash table for DWO CUs,TUs.
9800 There is one of these tables for each of CUs,TUs for each DWO file. */
9803 allocate_dwo_unit_table (struct objfile
*objfile
)
9805 /* Start out with a pretty small number.
9806 Generally DWO files contain only one CU and maybe some TUs. */
9807 return htab_create_alloc_ex (3,
9811 &objfile
->objfile_obstack
,
9812 hashtab_obstack_allocate
,
9813 dummy_obstack_deallocate
);
9816 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
9818 struct create_dwo_cu_data
9820 struct dwo_file
*dwo_file
;
9821 struct dwo_unit dwo_unit
;
9824 /* die_reader_func for create_dwo_cu. */
9827 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
9828 const gdb_byte
*info_ptr
,
9829 struct die_info
*comp_unit_die
,
9833 struct dwarf2_cu
*cu
= reader
->cu
;
9834 sect_offset sect_off
= cu
->per_cu
->sect_off
;
9835 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
9836 struct create_dwo_cu_data
*data
= (struct create_dwo_cu_data
*) datap
;
9837 struct dwo_file
*dwo_file
= data
->dwo_file
;
9838 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
9839 struct attribute
*attr
;
9841 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
9844 complaint (&symfile_complaints
,
9845 _("Dwarf Error: debug entry at offset 0x%x is missing"
9846 " its dwo_id [in module %s]"),
9847 to_underlying (sect_off
), dwo_file
->dwo_name
);
9851 dwo_unit
->dwo_file
= dwo_file
;
9852 dwo_unit
->signature
= DW_UNSND (attr
);
9853 dwo_unit
->section
= section
;
9854 dwo_unit
->sect_off
= sect_off
;
9855 dwo_unit
->length
= cu
->per_cu
->length
;
9857 if (dwarf_read_debug
)
9858 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, dwo_id %s\n",
9859 to_underlying (sect_off
),
9860 hex_string (dwo_unit
->signature
));
9863 /* Create the dwo_units for the CUs in a DWO_FILE.
9864 Note: This function processes DWO files only, not DWP files. */
9867 create_cus_hash_table (struct dwo_file
&dwo_file
, dwarf2_section_info
§ion
,
9870 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9871 const struct dwarf2_section_info
*abbrev_section
= &dwo_file
.sections
.abbrev
;
9872 const gdb_byte
*info_ptr
, *end_ptr
;
9874 dwarf2_read_section (objfile
, §ion
);
9875 info_ptr
= section
.buffer
;
9877 if (info_ptr
== NULL
)
9880 if (dwarf_read_debug
)
9882 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
9883 get_section_name (§ion
),
9884 get_section_file_name (§ion
));
9887 end_ptr
= info_ptr
+ section
.size
;
9888 while (info_ptr
< end_ptr
)
9890 struct dwarf2_per_cu_data per_cu
;
9891 struct create_dwo_cu_data create_dwo_cu_data
;
9892 struct dwo_unit
*dwo_unit
;
9894 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
.buffer
);
9896 memset (&create_dwo_cu_data
.dwo_unit
, 0,
9897 sizeof (create_dwo_cu_data
.dwo_unit
));
9898 memset (&per_cu
, 0, sizeof (per_cu
));
9899 per_cu
.objfile
= objfile
;
9900 per_cu
.is_debug_types
= 0;
9901 per_cu
.sect_off
= sect_offset (info_ptr
- section
.buffer
);
9902 per_cu
.section
= §ion
;
9903 create_dwo_cu_data
.dwo_file
= &dwo_file
;
9905 init_cutu_and_read_dies_no_follow (
9906 &per_cu
, &dwo_file
, create_dwo_cu_reader
, &create_dwo_cu_data
);
9907 info_ptr
+= per_cu
.length
;
9909 // If the unit could not be parsed, skip it.
9910 if (create_dwo_cu_data
.dwo_unit
.dwo_file
== NULL
)
9913 if (cus_htab
== NULL
)
9914 cus_htab
= allocate_dwo_unit_table (objfile
);
9916 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
9917 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
9918 slot
= htab_find_slot (cus_htab
, dwo_unit
, INSERT
);
9919 gdb_assert (slot
!= NULL
);
9922 const struct dwo_unit
*dup_cu
= (const struct dwo_unit
*)*slot
;
9923 sect_offset dup_sect_off
= dup_cu
->sect_off
;
9925 complaint (&symfile_complaints
,
9926 _("debug cu entry at offset 0x%x is duplicate to"
9927 " the entry at offset 0x%x, signature %s"),
9928 to_underlying (sect_off
), to_underlying (dup_sect_off
),
9929 hex_string (dwo_unit
->signature
));
9931 *slot
= (void *)dwo_unit
;
9935 /* DWP file .debug_{cu,tu}_index section format:
9936 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
9940 Both index sections have the same format, and serve to map a 64-bit
9941 signature to a set of section numbers. Each section begins with a header,
9942 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
9943 indexes, and a pool of 32-bit section numbers. The index sections will be
9944 aligned at 8-byte boundaries in the file.
9946 The index section header consists of:
9948 V, 32 bit version number
9950 N, 32 bit number of compilation units or type units in the index
9951 M, 32 bit number of slots in the hash table
9953 Numbers are recorded using the byte order of the application binary.
9955 The hash table begins at offset 16 in the section, and consists of an array
9956 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
9957 order of the application binary). Unused slots in the hash table are 0.
9958 (We rely on the extreme unlikeliness of a signature being exactly 0.)
9960 The parallel table begins immediately after the hash table
9961 (at offset 16 + 8 * M from the beginning of the section), and consists of an
9962 array of 32-bit indexes (using the byte order of the application binary),
9963 corresponding 1-1 with slots in the hash table. Each entry in the parallel
9964 table contains a 32-bit index into the pool of section numbers. For unused
9965 hash table slots, the corresponding entry in the parallel table will be 0.
9967 The pool of section numbers begins immediately following the hash table
9968 (at offset 16 + 12 * M from the beginning of the section). The pool of
9969 section numbers consists of an array of 32-bit words (using the byte order
9970 of the application binary). Each item in the array is indexed starting
9971 from 0. The hash table entry provides the index of the first section
9972 number in the set. Additional section numbers in the set follow, and the
9973 set is terminated by a 0 entry (section number 0 is not used in ELF).
9975 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
9976 section must be the first entry in the set, and the .debug_abbrev.dwo must
9977 be the second entry. Other members of the set may follow in any order.
9983 DWP Version 2 combines all the .debug_info, etc. sections into one,
9984 and the entries in the index tables are now offsets into these sections.
9985 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
9988 Index Section Contents:
9990 Hash Table of Signatures dwp_hash_table.hash_table
9991 Parallel Table of Indices dwp_hash_table.unit_table
9992 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
9993 Table of Section Sizes dwp_hash_table.v2.sizes
9995 The index section header consists of:
9997 V, 32 bit version number
9998 L, 32 bit number of columns in the table of section offsets
9999 N, 32 bit number of compilation units or type units in the index
10000 M, 32 bit number of slots in the hash table
10002 Numbers are recorded using the byte order of the application binary.
10004 The hash table has the same format as version 1.
10005 The parallel table of indices has the same format as version 1,
10006 except that the entries are origin-1 indices into the table of sections
10007 offsets and the table of section sizes.
10009 The table of offsets begins immediately following the parallel table
10010 (at offset 16 + 12 * M from the beginning of the section). The table is
10011 a two-dimensional array of 32-bit words (using the byte order of the
10012 application binary), with L columns and N+1 rows, in row-major order.
10013 Each row in the array is indexed starting from 0. The first row provides
10014 a key to the remaining rows: each column in this row provides an identifier
10015 for a debug section, and the offsets in the same column of subsequent rows
10016 refer to that section. The section identifiers are:
10018 DW_SECT_INFO 1 .debug_info.dwo
10019 DW_SECT_TYPES 2 .debug_types.dwo
10020 DW_SECT_ABBREV 3 .debug_abbrev.dwo
10021 DW_SECT_LINE 4 .debug_line.dwo
10022 DW_SECT_LOC 5 .debug_loc.dwo
10023 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
10024 DW_SECT_MACINFO 7 .debug_macinfo.dwo
10025 DW_SECT_MACRO 8 .debug_macro.dwo
10027 The offsets provided by the CU and TU index sections are the base offsets
10028 for the contributions made by each CU or TU to the corresponding section
10029 in the package file. Each CU and TU header contains an abbrev_offset
10030 field, used to find the abbreviations table for that CU or TU within the
10031 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
10032 be interpreted as relative to the base offset given in the index section.
10033 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
10034 should be interpreted as relative to the base offset for .debug_line.dwo,
10035 and offsets into other debug sections obtained from DWARF attributes should
10036 also be interpreted as relative to the corresponding base offset.
10038 The table of sizes begins immediately following the table of offsets.
10039 Like the table of offsets, it is a two-dimensional array of 32-bit words,
10040 with L columns and N rows, in row-major order. Each row in the array is
10041 indexed starting from 1 (row 0 is shared by the two tables).
10045 Hash table lookup is handled the same in version 1 and 2:
10047 We assume that N and M will not exceed 2^32 - 1.
10048 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
10050 Given a 64-bit compilation unit signature or a type signature S, an entry
10051 in the hash table is located as follows:
10053 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
10054 the low-order k bits all set to 1.
10056 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
10058 3) If the hash table entry at index H matches the signature, use that
10059 entry. If the hash table entry at index H is unused (all zeroes),
10060 terminate the search: the signature is not present in the table.
10062 4) Let H = (H + H') modulo M. Repeat at Step 3.
10064 Because M > N and H' and M are relatively prime, the search is guaranteed
10065 to stop at an unused slot or find the match. */
10067 /* Create a hash table to map DWO IDs to their CU/TU entry in
10068 .debug_{info,types}.dwo in DWP_FILE.
10069 Returns NULL if there isn't one.
10070 Note: This function processes DWP files only, not DWO files. */
10072 static struct dwp_hash_table
*
10073 create_dwp_hash_table (struct dwp_file
*dwp_file
, int is_debug_types
)
10075 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10076 bfd
*dbfd
= dwp_file
->dbfd
;
10077 const gdb_byte
*index_ptr
, *index_end
;
10078 struct dwarf2_section_info
*index
;
10079 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
10080 struct dwp_hash_table
*htab
;
10082 if (is_debug_types
)
10083 index
= &dwp_file
->sections
.tu_index
;
10085 index
= &dwp_file
->sections
.cu_index
;
10087 if (dwarf2_section_empty_p (index
))
10089 dwarf2_read_section (objfile
, index
);
10091 index_ptr
= index
->buffer
;
10092 index_end
= index_ptr
+ index
->size
;
10094 version
= read_4_bytes (dbfd
, index_ptr
);
10097 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
10101 nr_units
= read_4_bytes (dbfd
, index_ptr
);
10103 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
10106 if (version
!= 1 && version
!= 2)
10108 error (_("Dwarf Error: unsupported DWP file version (%s)"
10109 " [in module %s]"),
10110 pulongest (version
), dwp_file
->name
);
10112 if (nr_slots
!= (nr_slots
& -nr_slots
))
10114 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
10115 " is not power of 2 [in module %s]"),
10116 pulongest (nr_slots
), dwp_file
->name
);
10119 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
10120 htab
->version
= version
;
10121 htab
->nr_columns
= nr_columns
;
10122 htab
->nr_units
= nr_units
;
10123 htab
->nr_slots
= nr_slots
;
10124 htab
->hash_table
= index_ptr
;
10125 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
10127 /* Exit early if the table is empty. */
10128 if (nr_slots
== 0 || nr_units
== 0
10129 || (version
== 2 && nr_columns
== 0))
10131 /* All must be zero. */
10132 if (nr_slots
!= 0 || nr_units
!= 0
10133 || (version
== 2 && nr_columns
!= 0))
10135 complaint (&symfile_complaints
,
10136 _("Empty DWP but nr_slots,nr_units,nr_columns not"
10137 " all zero [in modules %s]"),
10145 htab
->section_pool
.v1
.indices
=
10146 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
10147 /* It's harder to decide whether the section is too small in v1.
10148 V1 is deprecated anyway so we punt. */
10152 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
10153 int *ids
= htab
->section_pool
.v2
.section_ids
;
10154 /* Reverse map for error checking. */
10155 int ids_seen
[DW_SECT_MAX
+ 1];
10158 if (nr_columns
< 2)
10160 error (_("Dwarf Error: bad DWP hash table, too few columns"
10161 " in section table [in module %s]"),
10164 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
10166 error (_("Dwarf Error: bad DWP hash table, too many columns"
10167 " in section table [in module %s]"),
10170 memset (ids
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
10171 memset (ids_seen
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
10172 for (i
= 0; i
< nr_columns
; ++i
)
10174 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
10176 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
10178 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
10179 " in section table [in module %s]"),
10180 id
, dwp_file
->name
);
10182 if (ids_seen
[id
] != -1)
10184 error (_("Dwarf Error: bad DWP hash table, duplicate section"
10185 " id %d in section table [in module %s]"),
10186 id
, dwp_file
->name
);
10191 /* Must have exactly one info or types section. */
10192 if (((ids_seen
[DW_SECT_INFO
] != -1)
10193 + (ids_seen
[DW_SECT_TYPES
] != -1))
10196 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
10197 " DWO info/types section [in module %s]"),
10200 /* Must have an abbrev section. */
10201 if (ids_seen
[DW_SECT_ABBREV
] == -1)
10203 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
10204 " section [in module %s]"),
10207 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
10208 htab
->section_pool
.v2
.sizes
=
10209 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
10210 * nr_units
* nr_columns
);
10211 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
10212 * nr_units
* nr_columns
))
10215 error (_("Dwarf Error: DWP index section is corrupt (too small)"
10216 " [in module %s]"),
10224 /* Update SECTIONS with the data from SECTP.
10226 This function is like the other "locate" section routines that are
10227 passed to bfd_map_over_sections, but in this context the sections to
10228 read comes from the DWP V1 hash table, not the full ELF section table.
10230 The result is non-zero for success, or zero if an error was found. */
10233 locate_v1_virtual_dwo_sections (asection
*sectp
,
10234 struct virtual_v1_dwo_sections
*sections
)
10236 const struct dwop_section_names
*names
= &dwop_section_names
;
10238 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10240 /* There can be only one. */
10241 if (sections
->abbrev
.s
.section
!= NULL
)
10243 sections
->abbrev
.s
.section
= sectp
;
10244 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
10246 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
10247 || section_is_p (sectp
->name
, &names
->types_dwo
))
10249 /* There can be only one. */
10250 if (sections
->info_or_types
.s
.section
!= NULL
)
10252 sections
->info_or_types
.s
.section
= sectp
;
10253 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
10255 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10257 /* There can be only one. */
10258 if (sections
->line
.s
.section
!= NULL
)
10260 sections
->line
.s
.section
= sectp
;
10261 sections
->line
.size
= bfd_get_section_size (sectp
);
10263 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10265 /* There can be only one. */
10266 if (sections
->loc
.s
.section
!= NULL
)
10268 sections
->loc
.s
.section
= sectp
;
10269 sections
->loc
.size
= bfd_get_section_size (sectp
);
10271 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10273 /* There can be only one. */
10274 if (sections
->macinfo
.s
.section
!= NULL
)
10276 sections
->macinfo
.s
.section
= sectp
;
10277 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
10279 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10281 /* There can be only one. */
10282 if (sections
->macro
.s
.section
!= NULL
)
10284 sections
->macro
.s
.section
= sectp
;
10285 sections
->macro
.size
= bfd_get_section_size (sectp
);
10287 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10289 /* There can be only one. */
10290 if (sections
->str_offsets
.s
.section
!= NULL
)
10292 sections
->str_offsets
.s
.section
= sectp
;
10293 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
10297 /* No other kind of section is valid. */
10304 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
10305 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
10306 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
10307 This is for DWP version 1 files. */
10309 static struct dwo_unit
*
10310 create_dwo_unit_in_dwp_v1 (struct dwp_file
*dwp_file
,
10311 uint32_t unit_index
,
10312 const char *comp_dir
,
10313 ULONGEST signature
, int is_debug_types
)
10315 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10316 const struct dwp_hash_table
*dwp_htab
=
10317 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10318 bfd
*dbfd
= dwp_file
->dbfd
;
10319 const char *kind
= is_debug_types
? "TU" : "CU";
10320 struct dwo_file
*dwo_file
;
10321 struct dwo_unit
*dwo_unit
;
10322 struct virtual_v1_dwo_sections sections
;
10323 void **dwo_file_slot
;
10326 gdb_assert (dwp_file
->version
== 1);
10328 if (dwarf_read_debug
)
10330 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
10332 pulongest (unit_index
), hex_string (signature
),
10336 /* Fetch the sections of this DWO unit.
10337 Put a limit on the number of sections we look for so that bad data
10338 doesn't cause us to loop forever. */
10340 #define MAX_NR_V1_DWO_SECTIONS \
10341 (1 /* .debug_info or .debug_types */ \
10342 + 1 /* .debug_abbrev */ \
10343 + 1 /* .debug_line */ \
10344 + 1 /* .debug_loc */ \
10345 + 1 /* .debug_str_offsets */ \
10346 + 1 /* .debug_macro or .debug_macinfo */ \
10347 + 1 /* trailing zero */)
10349 memset (§ions
, 0, sizeof (sections
));
10351 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
10354 uint32_t section_nr
=
10355 read_4_bytes (dbfd
,
10356 dwp_htab
->section_pool
.v1
.indices
10357 + (unit_index
+ i
) * sizeof (uint32_t));
10359 if (section_nr
== 0)
10361 if (section_nr
>= dwp_file
->num_sections
)
10363 error (_("Dwarf Error: bad DWP hash table, section number too large"
10364 " [in module %s]"),
10368 sectp
= dwp_file
->elf_sections
[section_nr
];
10369 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
10371 error (_("Dwarf Error: bad DWP hash table, invalid section found"
10372 " [in module %s]"),
10378 || dwarf2_section_empty_p (§ions
.info_or_types
)
10379 || dwarf2_section_empty_p (§ions
.abbrev
))
10381 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
10382 " [in module %s]"),
10385 if (i
== MAX_NR_V1_DWO_SECTIONS
)
10387 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
10388 " [in module %s]"),
10392 /* It's easier for the rest of the code if we fake a struct dwo_file and
10393 have dwo_unit "live" in that. At least for now.
10395 The DWP file can be made up of a random collection of CUs and TUs.
10396 However, for each CU + set of TUs that came from the same original DWO
10397 file, we can combine them back into a virtual DWO file to save space
10398 (fewer struct dwo_file objects to allocate). Remember that for really
10399 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10401 std::string virtual_dwo_name
=
10402 string_printf ("virtual-dwo/%d-%d-%d-%d",
10403 get_section_id (§ions
.abbrev
),
10404 get_section_id (§ions
.line
),
10405 get_section_id (§ions
.loc
),
10406 get_section_id (§ions
.str_offsets
));
10407 /* Can we use an existing virtual DWO file? */
10408 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
.c_str (), comp_dir
);
10409 /* Create one if necessary. */
10410 if (*dwo_file_slot
== NULL
)
10412 if (dwarf_read_debug
)
10414 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
10415 virtual_dwo_name
.c_str ());
10417 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10419 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
10420 virtual_dwo_name
.c_str (),
10421 virtual_dwo_name
.size ());
10422 dwo_file
->comp_dir
= comp_dir
;
10423 dwo_file
->sections
.abbrev
= sections
.abbrev
;
10424 dwo_file
->sections
.line
= sections
.line
;
10425 dwo_file
->sections
.loc
= sections
.loc
;
10426 dwo_file
->sections
.macinfo
= sections
.macinfo
;
10427 dwo_file
->sections
.macro
= sections
.macro
;
10428 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
10429 /* The "str" section is global to the entire DWP file. */
10430 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10431 /* The info or types section is assigned below to dwo_unit,
10432 there's no need to record it in dwo_file.
10433 Also, we can't simply record type sections in dwo_file because
10434 we record a pointer into the vector in dwo_unit. As we collect more
10435 types we'll grow the vector and eventually have to reallocate space
10436 for it, invalidating all copies of pointers into the previous
10438 *dwo_file_slot
= dwo_file
;
10442 if (dwarf_read_debug
)
10444 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10445 virtual_dwo_name
.c_str ());
10447 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
10450 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10451 dwo_unit
->dwo_file
= dwo_file
;
10452 dwo_unit
->signature
= signature
;
10453 dwo_unit
->section
=
10454 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
10455 *dwo_unit
->section
= sections
.info_or_types
;
10456 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10461 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
10462 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
10463 piece within that section used by a TU/CU, return a virtual section
10464 of just that piece. */
10466 static struct dwarf2_section_info
10467 create_dwp_v2_section (struct dwarf2_section_info
*section
,
10468 bfd_size_type offset
, bfd_size_type size
)
10470 struct dwarf2_section_info result
;
10473 gdb_assert (section
!= NULL
);
10474 gdb_assert (!section
->is_virtual
);
10476 memset (&result
, 0, sizeof (result
));
10477 result
.s
.containing_section
= section
;
10478 result
.is_virtual
= 1;
10483 sectp
= get_section_bfd_section (section
);
10485 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
10486 bounds of the real section. This is a pretty-rare event, so just
10487 flag an error (easier) instead of a warning and trying to cope. */
10489 || offset
+ size
> bfd_get_section_size (sectp
))
10491 bfd
*abfd
= sectp
->owner
;
10493 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
10494 " in section %s [in module %s]"),
10495 sectp
? bfd_section_name (abfd
, sectp
) : "<unknown>",
10496 objfile_name (dwarf2_per_objfile
->objfile
));
10499 result
.virtual_offset
= offset
;
10500 result
.size
= size
;
10504 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
10505 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
10506 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
10507 This is for DWP version 2 files. */
10509 static struct dwo_unit
*
10510 create_dwo_unit_in_dwp_v2 (struct dwp_file
*dwp_file
,
10511 uint32_t unit_index
,
10512 const char *comp_dir
,
10513 ULONGEST signature
, int is_debug_types
)
10515 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10516 const struct dwp_hash_table
*dwp_htab
=
10517 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10518 bfd
*dbfd
= dwp_file
->dbfd
;
10519 const char *kind
= is_debug_types
? "TU" : "CU";
10520 struct dwo_file
*dwo_file
;
10521 struct dwo_unit
*dwo_unit
;
10522 struct virtual_v2_dwo_sections sections
;
10523 void **dwo_file_slot
;
10526 gdb_assert (dwp_file
->version
== 2);
10528 if (dwarf_read_debug
)
10530 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
10532 pulongest (unit_index
), hex_string (signature
),
10536 /* Fetch the section offsets of this DWO unit. */
10538 memset (§ions
, 0, sizeof (sections
));
10540 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
10542 uint32_t offset
= read_4_bytes (dbfd
,
10543 dwp_htab
->section_pool
.v2
.offsets
10544 + (((unit_index
- 1) * dwp_htab
->nr_columns
10546 * sizeof (uint32_t)));
10547 uint32_t size
= read_4_bytes (dbfd
,
10548 dwp_htab
->section_pool
.v2
.sizes
10549 + (((unit_index
- 1) * dwp_htab
->nr_columns
10551 * sizeof (uint32_t)));
10553 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
10556 case DW_SECT_TYPES
:
10557 sections
.info_or_types_offset
= offset
;
10558 sections
.info_or_types_size
= size
;
10560 case DW_SECT_ABBREV
:
10561 sections
.abbrev_offset
= offset
;
10562 sections
.abbrev_size
= size
;
10565 sections
.line_offset
= offset
;
10566 sections
.line_size
= size
;
10569 sections
.loc_offset
= offset
;
10570 sections
.loc_size
= size
;
10572 case DW_SECT_STR_OFFSETS
:
10573 sections
.str_offsets_offset
= offset
;
10574 sections
.str_offsets_size
= size
;
10576 case DW_SECT_MACINFO
:
10577 sections
.macinfo_offset
= offset
;
10578 sections
.macinfo_size
= size
;
10580 case DW_SECT_MACRO
:
10581 sections
.macro_offset
= offset
;
10582 sections
.macro_size
= size
;
10587 /* It's easier for the rest of the code if we fake a struct dwo_file and
10588 have dwo_unit "live" in that. At least for now.
10590 The DWP file can be made up of a random collection of CUs and TUs.
10591 However, for each CU + set of TUs that came from the same original DWO
10592 file, we can combine them back into a virtual DWO file to save space
10593 (fewer struct dwo_file objects to allocate). Remember that for really
10594 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10596 std::string virtual_dwo_name
=
10597 string_printf ("virtual-dwo/%ld-%ld-%ld-%ld",
10598 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
10599 (long) (sections
.line_size
? sections
.line_offset
: 0),
10600 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
10601 (long) (sections
.str_offsets_size
10602 ? sections
.str_offsets_offset
: 0));
10603 /* Can we use an existing virtual DWO file? */
10604 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
.c_str (), comp_dir
);
10605 /* Create one if necessary. */
10606 if (*dwo_file_slot
== NULL
)
10608 if (dwarf_read_debug
)
10610 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
10611 virtual_dwo_name
.c_str ());
10613 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10615 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
10616 virtual_dwo_name
.c_str (),
10617 virtual_dwo_name
.size ());
10618 dwo_file
->comp_dir
= comp_dir
;
10619 dwo_file
->sections
.abbrev
=
10620 create_dwp_v2_section (&dwp_file
->sections
.abbrev
,
10621 sections
.abbrev_offset
, sections
.abbrev_size
);
10622 dwo_file
->sections
.line
=
10623 create_dwp_v2_section (&dwp_file
->sections
.line
,
10624 sections
.line_offset
, sections
.line_size
);
10625 dwo_file
->sections
.loc
=
10626 create_dwp_v2_section (&dwp_file
->sections
.loc
,
10627 sections
.loc_offset
, sections
.loc_size
);
10628 dwo_file
->sections
.macinfo
=
10629 create_dwp_v2_section (&dwp_file
->sections
.macinfo
,
10630 sections
.macinfo_offset
, sections
.macinfo_size
);
10631 dwo_file
->sections
.macro
=
10632 create_dwp_v2_section (&dwp_file
->sections
.macro
,
10633 sections
.macro_offset
, sections
.macro_size
);
10634 dwo_file
->sections
.str_offsets
=
10635 create_dwp_v2_section (&dwp_file
->sections
.str_offsets
,
10636 sections
.str_offsets_offset
,
10637 sections
.str_offsets_size
);
10638 /* The "str" section is global to the entire DWP file. */
10639 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10640 /* The info or types section is assigned below to dwo_unit,
10641 there's no need to record it in dwo_file.
10642 Also, we can't simply record type sections in dwo_file because
10643 we record a pointer into the vector in dwo_unit. As we collect more
10644 types we'll grow the vector and eventually have to reallocate space
10645 for it, invalidating all copies of pointers into the previous
10647 *dwo_file_slot
= dwo_file
;
10651 if (dwarf_read_debug
)
10653 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10654 virtual_dwo_name
.c_str ());
10656 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
10659 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10660 dwo_unit
->dwo_file
= dwo_file
;
10661 dwo_unit
->signature
= signature
;
10662 dwo_unit
->section
=
10663 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
10664 *dwo_unit
->section
= create_dwp_v2_section (is_debug_types
10665 ? &dwp_file
->sections
.types
10666 : &dwp_file
->sections
.info
,
10667 sections
.info_or_types_offset
,
10668 sections
.info_or_types_size
);
10669 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10674 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
10675 Returns NULL if the signature isn't found. */
10677 static struct dwo_unit
*
10678 lookup_dwo_unit_in_dwp (struct dwp_file
*dwp_file
, const char *comp_dir
,
10679 ULONGEST signature
, int is_debug_types
)
10681 const struct dwp_hash_table
*dwp_htab
=
10682 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10683 bfd
*dbfd
= dwp_file
->dbfd
;
10684 uint32_t mask
= dwp_htab
->nr_slots
- 1;
10685 uint32_t hash
= signature
& mask
;
10686 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
10689 struct dwo_unit find_dwo_cu
;
10691 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
10692 find_dwo_cu
.signature
= signature
;
10693 slot
= htab_find_slot (is_debug_types
10694 ? dwp_file
->loaded_tus
10695 : dwp_file
->loaded_cus
,
10696 &find_dwo_cu
, INSERT
);
10699 return (struct dwo_unit
*) *slot
;
10701 /* Use a for loop so that we don't loop forever on bad debug info. */
10702 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
10704 ULONGEST signature_in_table
;
10706 signature_in_table
=
10707 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
10708 if (signature_in_table
== signature
)
10710 uint32_t unit_index
=
10711 read_4_bytes (dbfd
,
10712 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
10714 if (dwp_file
->version
== 1)
10716 *slot
= create_dwo_unit_in_dwp_v1 (dwp_file
, unit_index
,
10717 comp_dir
, signature
,
10722 *slot
= create_dwo_unit_in_dwp_v2 (dwp_file
, unit_index
,
10723 comp_dir
, signature
,
10726 return (struct dwo_unit
*) *slot
;
10728 if (signature_in_table
== 0)
10730 hash
= (hash
+ hash2
) & mask
;
10733 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
10734 " [in module %s]"),
10738 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
10739 Open the file specified by FILE_NAME and hand it off to BFD for
10740 preliminary analysis. Return a newly initialized bfd *, which
10741 includes a canonicalized copy of FILE_NAME.
10742 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
10743 SEARCH_CWD is true if the current directory is to be searched.
10744 It will be searched before debug-file-directory.
10745 If successful, the file is added to the bfd include table of the
10746 objfile's bfd (see gdb_bfd_record_inclusion).
10747 If unable to find/open the file, return NULL.
10748 NOTE: This function is derived from symfile_bfd_open. */
10750 static gdb_bfd_ref_ptr
10751 try_open_dwop_file (const char *file_name
, int is_dwp
, int search_cwd
)
10754 char *absolute_name
;
10755 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
10756 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
10757 to debug_file_directory. */
10759 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
10763 if (*debug_file_directory
!= '\0')
10764 search_path
= concat (".", dirname_separator_string
,
10765 debug_file_directory
, (char *) NULL
);
10767 search_path
= xstrdup (".");
10770 search_path
= xstrdup (debug_file_directory
);
10772 flags
= OPF_RETURN_REALPATH
;
10774 flags
|= OPF_SEARCH_IN_PATH
;
10775 desc
= openp (search_path
, flags
, file_name
,
10776 O_RDONLY
| O_BINARY
, &absolute_name
);
10777 xfree (search_path
);
10781 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (absolute_name
, gnutarget
, desc
));
10782 xfree (absolute_name
);
10783 if (sym_bfd
== NULL
)
10785 bfd_set_cacheable (sym_bfd
.get (), 1);
10787 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
10790 /* Success. Record the bfd as having been included by the objfile's bfd.
10791 This is important because things like demangled_names_hash lives in the
10792 objfile's per_bfd space and may have references to things like symbol
10793 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
10794 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
.get ());
10799 /* Try to open DWO file FILE_NAME.
10800 COMP_DIR is the DW_AT_comp_dir attribute.
10801 The result is the bfd handle of the file.
10802 If there is a problem finding or opening the file, return NULL.
10803 Upon success, the canonicalized path of the file is stored in the bfd,
10804 same as symfile_bfd_open. */
10806 static gdb_bfd_ref_ptr
10807 open_dwo_file (const char *file_name
, const char *comp_dir
)
10809 if (IS_ABSOLUTE_PATH (file_name
))
10810 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 0 /*search_cwd*/);
10812 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
10814 if (comp_dir
!= NULL
)
10816 char *path_to_try
= concat (comp_dir
, SLASH_STRING
,
10817 file_name
, (char *) NULL
);
10819 /* NOTE: If comp_dir is a relative path, this will also try the
10820 search path, which seems useful. */
10821 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (path_to_try
, 0 /*is_dwp*/,
10822 1 /*search_cwd*/));
10823 xfree (path_to_try
);
10828 /* That didn't work, try debug-file-directory, which, despite its name,
10829 is a list of paths. */
10831 if (*debug_file_directory
== '\0')
10834 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 1 /*search_cwd*/);
10837 /* This function is mapped across the sections and remembers the offset and
10838 size of each of the DWO debugging sections we are interested in. */
10841 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
10843 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
10844 const struct dwop_section_names
*names
= &dwop_section_names
;
10846 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10848 dwo_sections
->abbrev
.s
.section
= sectp
;
10849 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
10851 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
10853 dwo_sections
->info
.s
.section
= sectp
;
10854 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
10856 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10858 dwo_sections
->line
.s
.section
= sectp
;
10859 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
10861 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10863 dwo_sections
->loc
.s
.section
= sectp
;
10864 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
10866 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10868 dwo_sections
->macinfo
.s
.section
= sectp
;
10869 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
10871 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10873 dwo_sections
->macro
.s
.section
= sectp
;
10874 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
10876 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
10878 dwo_sections
->str
.s
.section
= sectp
;
10879 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
10881 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10883 dwo_sections
->str_offsets
.s
.section
= sectp
;
10884 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
10886 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
10888 struct dwarf2_section_info type_section
;
10890 memset (&type_section
, 0, sizeof (type_section
));
10891 type_section
.s
.section
= sectp
;
10892 type_section
.size
= bfd_get_section_size (sectp
);
10893 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
10898 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
10899 by PER_CU. This is for the non-DWP case.
10900 The result is NULL if DWO_NAME can't be found. */
10902 static struct dwo_file
*
10903 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
10904 const char *dwo_name
, const char *comp_dir
)
10906 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10907 struct dwo_file
*dwo_file
;
10908 struct cleanup
*cleanups
;
10910 gdb_bfd_ref_ptr
dbfd (open_dwo_file (dwo_name
, comp_dir
));
10913 if (dwarf_read_debug
)
10914 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
10917 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10918 dwo_file
->dwo_name
= dwo_name
;
10919 dwo_file
->comp_dir
= comp_dir
;
10920 dwo_file
->dbfd
= dbfd
.release ();
10922 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwo_file
);
10924 bfd_map_over_sections (dwo_file
->dbfd
, dwarf2_locate_dwo_sections
,
10925 &dwo_file
->sections
);
10927 create_cus_hash_table (*dwo_file
, dwo_file
->sections
.info
, dwo_file
->cus
);
10929 create_debug_types_hash_table (dwo_file
, dwo_file
->sections
.types
,
10932 discard_cleanups (cleanups
);
10934 if (dwarf_read_debug
)
10935 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
10940 /* This function is mapped across the sections and remembers the offset and
10941 size of each of the DWP debugging sections common to version 1 and 2 that
10942 we are interested in. */
10945 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
10946 void *dwp_file_ptr
)
10948 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
10949 const struct dwop_section_names
*names
= &dwop_section_names
;
10950 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
10952 /* Record the ELF section number for later lookup: this is what the
10953 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10954 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
10955 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
10957 /* Look for specific sections that we need. */
10958 if (section_is_p (sectp
->name
, &names
->str_dwo
))
10960 dwp_file
->sections
.str
.s
.section
= sectp
;
10961 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
10963 else if (section_is_p (sectp
->name
, &names
->cu_index
))
10965 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
10966 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
10968 else if (section_is_p (sectp
->name
, &names
->tu_index
))
10970 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
10971 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
10975 /* This function is mapped across the sections and remembers the offset and
10976 size of each of the DWP version 2 debugging sections that we are interested
10977 in. This is split into a separate function because we don't know if we
10978 have version 1 or 2 until we parse the cu_index/tu_index sections. */
10981 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, 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
->abbrev_dwo
))
10995 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
10996 dwp_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
10998 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
11000 dwp_file
->sections
.info
.s
.section
= sectp
;
11001 dwp_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
11003 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
11005 dwp_file
->sections
.line
.s
.section
= sectp
;
11006 dwp_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
11008 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
11010 dwp_file
->sections
.loc
.s
.section
= sectp
;
11011 dwp_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
11013 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
11015 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
11016 dwp_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
11018 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
11020 dwp_file
->sections
.macro
.s
.section
= sectp
;
11021 dwp_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
11023 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
11025 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
11026 dwp_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
11028 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
11030 dwp_file
->sections
.types
.s
.section
= sectp
;
11031 dwp_file
->sections
.types
.size
= bfd_get_section_size (sectp
);
11035 /* Hash function for dwp_file loaded CUs/TUs. */
11038 hash_dwp_loaded_cutus (const void *item
)
11040 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
11042 /* This drops the top 32 bits of the signature, but is ok for a hash. */
11043 return dwo_unit
->signature
;
11046 /* Equality function for dwp_file loaded CUs/TUs. */
11049 eq_dwp_loaded_cutus (const void *a
, const void *b
)
11051 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
11052 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
11054 return dua
->signature
== dub
->signature
;
11057 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
11060 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
11062 return htab_create_alloc_ex (3,
11063 hash_dwp_loaded_cutus
,
11064 eq_dwp_loaded_cutus
,
11066 &objfile
->objfile_obstack
,
11067 hashtab_obstack_allocate
,
11068 dummy_obstack_deallocate
);
11071 /* Try to open DWP file FILE_NAME.
11072 The result is the bfd handle of the file.
11073 If there is a problem finding or opening the file, return NULL.
11074 Upon success, the canonicalized path of the file is stored in the bfd,
11075 same as symfile_bfd_open. */
11077 static gdb_bfd_ref_ptr
11078 open_dwp_file (const char *file_name
)
11080 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (file_name
, 1 /*is_dwp*/,
11081 1 /*search_cwd*/));
11085 /* Work around upstream bug 15652.
11086 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
11087 [Whether that's a "bug" is debatable, but it is getting in our way.]
11088 We have no real idea where the dwp file is, because gdb's realpath-ing
11089 of the executable's path may have discarded the needed info.
11090 [IWBN if the dwp file name was recorded in the executable, akin to
11091 .gnu_debuglink, but that doesn't exist yet.]
11092 Strip the directory from FILE_NAME and search again. */
11093 if (*debug_file_directory
!= '\0')
11095 /* Don't implicitly search the current directory here.
11096 If the user wants to search "." to handle this case,
11097 it must be added to debug-file-directory. */
11098 return try_open_dwop_file (lbasename (file_name
), 1 /*is_dwp*/,
11105 /* Initialize the use of the DWP file for the current objfile.
11106 By convention the name of the DWP file is ${objfile}.dwp.
11107 The result is NULL if it can't be found. */
11109 static struct dwp_file
*
11110 open_and_init_dwp_file (void)
11112 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11113 struct dwp_file
*dwp_file
;
11115 /* Try to find first .dwp for the binary file before any symbolic links
11118 /* If the objfile is a debug file, find the name of the real binary
11119 file and get the name of dwp file from there. */
11120 std::string dwp_name
;
11121 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
11123 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
11124 const char *backlink_basename
= lbasename (backlink
->original_name
);
11126 dwp_name
= ldirname (objfile
->original_name
) + SLASH_STRING
+ backlink_basename
;
11129 dwp_name
= objfile
->original_name
;
11131 dwp_name
+= ".dwp";
11133 gdb_bfd_ref_ptr
dbfd (open_dwp_file (dwp_name
.c_str ()));
11135 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
11137 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
11138 dwp_name
= objfile_name (objfile
);
11139 dwp_name
+= ".dwp";
11140 dbfd
= open_dwp_file (dwp_name
.c_str ());
11145 if (dwarf_read_debug
)
11146 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
.c_str ());
11149 dwp_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_file
);
11150 dwp_file
->name
= bfd_get_filename (dbfd
.get ());
11151 dwp_file
->dbfd
= dbfd
.release ();
11153 /* +1: section 0 is unused */
11154 dwp_file
->num_sections
= bfd_count_sections (dwp_file
->dbfd
) + 1;
11155 dwp_file
->elf_sections
=
11156 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
11157 dwp_file
->num_sections
, asection
*);
11159 bfd_map_over_sections (dwp_file
->dbfd
, dwarf2_locate_common_dwp_sections
,
11162 dwp_file
->cus
= create_dwp_hash_table (dwp_file
, 0);
11164 dwp_file
->tus
= create_dwp_hash_table (dwp_file
, 1);
11166 /* The DWP file version is stored in the hash table. Oh well. */
11167 if (dwp_file
->cus
&& dwp_file
->tus
11168 && dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
11170 /* Technically speaking, we should try to limp along, but this is
11171 pretty bizarre. We use pulongest here because that's the established
11172 portability solution (e.g, we cannot use %u for uint32_t). */
11173 error (_("Dwarf Error: DWP file CU version %s doesn't match"
11174 " TU version %s [in DWP file %s]"),
11175 pulongest (dwp_file
->cus
->version
),
11176 pulongest (dwp_file
->tus
->version
), dwp_name
.c_str ());
11180 dwp_file
->version
= dwp_file
->cus
->version
;
11181 else if (dwp_file
->tus
)
11182 dwp_file
->version
= dwp_file
->tus
->version
;
11184 dwp_file
->version
= 2;
11186 if (dwp_file
->version
== 2)
11187 bfd_map_over_sections (dwp_file
->dbfd
, dwarf2_locate_v2_dwp_sections
,
11190 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
11191 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
11193 if (dwarf_read_debug
)
11195 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
11196 fprintf_unfiltered (gdb_stdlog
,
11197 " %s CUs, %s TUs\n",
11198 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
11199 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
11205 /* Wrapper around open_and_init_dwp_file, only open it once. */
11207 static struct dwp_file
*
11208 get_dwp_file (void)
11210 if (! dwarf2_per_objfile
->dwp_checked
)
11212 dwarf2_per_objfile
->dwp_file
= open_and_init_dwp_file ();
11213 dwarf2_per_objfile
->dwp_checked
= 1;
11215 return dwarf2_per_objfile
->dwp_file
;
11218 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
11219 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
11220 or in the DWP file for the objfile, referenced by THIS_UNIT.
11221 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
11222 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
11224 This is called, for example, when wanting to read a variable with a
11225 complex location. Therefore we don't want to do file i/o for every call.
11226 Therefore we don't want to look for a DWO file on every call.
11227 Therefore we first see if we've already seen SIGNATURE in a DWP file,
11228 then we check if we've already seen DWO_NAME, and only THEN do we check
11231 The result is a pointer to the dwo_unit object or NULL if we didn't find it
11232 (dwo_id mismatch or couldn't find the DWO/DWP file). */
11234 static struct dwo_unit
*
11235 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
11236 const char *dwo_name
, const char *comp_dir
,
11237 ULONGEST signature
, int is_debug_types
)
11239 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11240 const char *kind
= is_debug_types
? "TU" : "CU";
11241 void **dwo_file_slot
;
11242 struct dwo_file
*dwo_file
;
11243 struct dwp_file
*dwp_file
;
11245 /* First see if there's a DWP file.
11246 If we have a DWP file but didn't find the DWO inside it, don't
11247 look for the original DWO file. It makes gdb behave differently
11248 depending on whether one is debugging in the build tree. */
11250 dwp_file
= get_dwp_file ();
11251 if (dwp_file
!= NULL
)
11253 const struct dwp_hash_table
*dwp_htab
=
11254 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
11256 if (dwp_htab
!= NULL
)
11258 struct dwo_unit
*dwo_cutu
=
11259 lookup_dwo_unit_in_dwp (dwp_file
, comp_dir
,
11260 signature
, is_debug_types
);
11262 if (dwo_cutu
!= NULL
)
11264 if (dwarf_read_debug
)
11266 fprintf_unfiltered (gdb_stdlog
,
11267 "Virtual DWO %s %s found: @%s\n",
11268 kind
, hex_string (signature
),
11269 host_address_to_string (dwo_cutu
));
11277 /* No DWP file, look for the DWO file. */
11279 dwo_file_slot
= lookup_dwo_file_slot (dwo_name
, comp_dir
);
11280 if (*dwo_file_slot
== NULL
)
11282 /* Read in the file and build a table of the CUs/TUs it contains. */
11283 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
11285 /* NOTE: This will be NULL if unable to open the file. */
11286 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
11288 if (dwo_file
!= NULL
)
11290 struct dwo_unit
*dwo_cutu
= NULL
;
11292 if (is_debug_types
&& dwo_file
->tus
)
11294 struct dwo_unit find_dwo_cutu
;
11296 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
11297 find_dwo_cutu
.signature
= signature
;
11299 = (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_cutu
);
11301 else if (!is_debug_types
&& dwo_file
->cus
)
11303 struct dwo_unit find_dwo_cutu
;
11305 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
11306 find_dwo_cutu
.signature
= signature
;
11307 dwo_cutu
= (struct dwo_unit
*)htab_find (dwo_file
->cus
,
11311 if (dwo_cutu
!= NULL
)
11313 if (dwarf_read_debug
)
11315 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
11316 kind
, dwo_name
, hex_string (signature
),
11317 host_address_to_string (dwo_cutu
));
11324 /* We didn't find it. This could mean a dwo_id mismatch, or
11325 someone deleted the DWO/DWP file, or the search path isn't set up
11326 correctly to find the file. */
11328 if (dwarf_read_debug
)
11330 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
11331 kind
, dwo_name
, hex_string (signature
));
11334 /* This is a warning and not a complaint because it can be caused by
11335 pilot error (e.g., user accidentally deleting the DWO). */
11337 /* Print the name of the DWP file if we looked there, helps the user
11338 better diagnose the problem. */
11339 std::string dwp_text
;
11341 if (dwp_file
!= NULL
)
11342 dwp_text
= string_printf (" [in DWP file %s]",
11343 lbasename (dwp_file
->name
));
11345 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x"
11346 " [in module %s]"),
11347 kind
, dwo_name
, hex_string (signature
),
11349 this_unit
->is_debug_types
? "TU" : "CU",
11350 to_underlying (this_unit
->sect_off
), objfile_name (objfile
));
11355 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
11356 See lookup_dwo_cutu_unit for details. */
11358 static struct dwo_unit
*
11359 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
11360 const char *dwo_name
, const char *comp_dir
,
11361 ULONGEST signature
)
11363 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
11366 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
11367 See lookup_dwo_cutu_unit for details. */
11369 static struct dwo_unit
*
11370 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
11371 const char *dwo_name
, const char *comp_dir
)
11373 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
11376 /* Traversal function for queue_and_load_all_dwo_tus. */
11379 queue_and_load_dwo_tu (void **slot
, void *info
)
11381 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
11382 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
11383 ULONGEST signature
= dwo_unit
->signature
;
11384 struct signatured_type
*sig_type
=
11385 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
11387 if (sig_type
!= NULL
)
11389 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
11391 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
11392 a real dependency of PER_CU on SIG_TYPE. That is detected later
11393 while processing PER_CU. */
11394 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
11395 load_full_type_unit (sig_cu
);
11396 VEC_safe_push (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, sig_cu
);
11402 /* Queue all TUs contained in the DWO of PER_CU to be read in.
11403 The DWO may have the only definition of the type, though it may not be
11404 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
11405 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
11408 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
11410 struct dwo_unit
*dwo_unit
;
11411 struct dwo_file
*dwo_file
;
11413 gdb_assert (!per_cu
->is_debug_types
);
11414 gdb_assert (get_dwp_file () == NULL
);
11415 gdb_assert (per_cu
->cu
!= NULL
);
11417 dwo_unit
= per_cu
->cu
->dwo_unit
;
11418 gdb_assert (dwo_unit
!= NULL
);
11420 dwo_file
= dwo_unit
->dwo_file
;
11421 if (dwo_file
->tus
!= NULL
)
11422 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
11425 /* Free all resources associated with DWO_FILE.
11426 Close the DWO file and munmap the sections.
11427 All memory should be on the objfile obstack. */
11430 free_dwo_file (struct dwo_file
*dwo_file
, struct objfile
*objfile
)
11433 /* Note: dbfd is NULL for virtual DWO files. */
11434 gdb_bfd_unref (dwo_file
->dbfd
);
11436 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
11439 /* Wrapper for free_dwo_file for use in cleanups. */
11442 free_dwo_file_cleanup (void *arg
)
11444 struct dwo_file
*dwo_file
= (struct dwo_file
*) arg
;
11445 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11447 free_dwo_file (dwo_file
, objfile
);
11450 /* Traversal function for free_dwo_files. */
11453 free_dwo_file_from_slot (void **slot
, void *info
)
11455 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
11456 struct objfile
*objfile
= (struct objfile
*) info
;
11458 free_dwo_file (dwo_file
, objfile
);
11463 /* Free all resources associated with DWO_FILES. */
11466 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
11468 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
11471 /* Read in various DIEs. */
11473 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
11474 Inherit only the children of the DW_AT_abstract_origin DIE not being
11475 already referenced by DW_AT_abstract_origin from the children of the
11479 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
11481 struct die_info
*child_die
;
11482 sect_offset
*offsetp
;
11483 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
11484 struct die_info
*origin_die
;
11485 /* Iterator of the ORIGIN_DIE children. */
11486 struct die_info
*origin_child_die
;
11487 struct attribute
*attr
;
11488 struct dwarf2_cu
*origin_cu
;
11489 struct pending
**origin_previous_list_in_scope
;
11491 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
11495 /* Note that following die references may follow to a die in a
11499 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
11501 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
11503 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
11504 origin_cu
->list_in_scope
= cu
->list_in_scope
;
11506 if (die
->tag
!= origin_die
->tag
11507 && !(die
->tag
== DW_TAG_inlined_subroutine
11508 && origin_die
->tag
== DW_TAG_subprogram
))
11509 complaint (&symfile_complaints
,
11510 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
11511 to_underlying (die
->sect_off
),
11512 to_underlying (origin_die
->sect_off
));
11514 std::vector
<sect_offset
> offsets
;
11516 for (child_die
= die
->child
;
11517 child_die
&& child_die
->tag
;
11518 child_die
= sibling_die (child_die
))
11520 struct die_info
*child_origin_die
;
11521 struct dwarf2_cu
*child_origin_cu
;
11523 /* We are trying to process concrete instance entries:
11524 DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
11525 it's not relevant to our analysis here. i.e. detecting DIEs that are
11526 present in the abstract instance but not referenced in the concrete
11528 if (child_die
->tag
== DW_TAG_call_site
11529 || child_die
->tag
== DW_TAG_GNU_call_site
)
11532 /* For each CHILD_DIE, find the corresponding child of
11533 ORIGIN_DIE. If there is more than one layer of
11534 DW_AT_abstract_origin, follow them all; there shouldn't be,
11535 but GCC versions at least through 4.4 generate this (GCC PR
11537 child_origin_die
= child_die
;
11538 child_origin_cu
= cu
;
11541 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
11545 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
11549 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
11550 counterpart may exist. */
11551 if (child_origin_die
!= child_die
)
11553 if (child_die
->tag
!= child_origin_die
->tag
11554 && !(child_die
->tag
== DW_TAG_inlined_subroutine
11555 && child_origin_die
->tag
== DW_TAG_subprogram
))
11556 complaint (&symfile_complaints
,
11557 _("Child DIE 0x%x and its abstract origin 0x%x have "
11559 to_underlying (child_die
->sect_off
),
11560 to_underlying (child_origin_die
->sect_off
));
11561 if (child_origin_die
->parent
!= origin_die
)
11562 complaint (&symfile_complaints
,
11563 _("Child DIE 0x%x and its abstract origin 0x%x have "
11564 "different parents"),
11565 to_underlying (child_die
->sect_off
),
11566 to_underlying (child_origin_die
->sect_off
));
11568 offsets
.push_back (child_origin_die
->sect_off
);
11571 std::sort (offsets
.begin (), offsets
.end ());
11572 sect_offset
*offsets_end
= offsets
.data () + offsets
.size ();
11573 for (offsetp
= offsets
.data () + 1; offsetp
< offsets_end
; offsetp
++)
11574 if (offsetp
[-1] == *offsetp
)
11575 complaint (&symfile_complaints
,
11576 _("Multiple children of DIE 0x%x refer "
11577 "to DIE 0x%x as their abstract origin"),
11578 to_underlying (die
->sect_off
), to_underlying (*offsetp
));
11580 offsetp
= offsets
.data ();
11581 origin_child_die
= origin_die
->child
;
11582 while (origin_child_die
&& origin_child_die
->tag
)
11584 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
11585 while (offsetp
< offsets_end
11586 && *offsetp
< origin_child_die
->sect_off
)
11588 if (offsetp
>= offsets_end
11589 || *offsetp
> origin_child_die
->sect_off
)
11591 /* Found that ORIGIN_CHILD_DIE is really not referenced.
11592 Check whether we're already processing ORIGIN_CHILD_DIE.
11593 This can happen with mutually referenced abstract_origins.
11595 if (!origin_child_die
->in_process
)
11596 process_die (origin_child_die
, origin_cu
);
11598 origin_child_die
= sibling_die (origin_child_die
);
11600 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
11604 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11606 struct objfile
*objfile
= cu
->objfile
;
11607 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11608 struct context_stack
*newobj
;
11611 struct die_info
*child_die
;
11612 struct attribute
*attr
, *call_line
, *call_file
;
11614 CORE_ADDR baseaddr
;
11615 struct block
*block
;
11616 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
11617 VEC (symbolp
) *template_args
= NULL
;
11618 struct template_symbol
*templ_func
= NULL
;
11622 /* If we do not have call site information, we can't show the
11623 caller of this inlined function. That's too confusing, so
11624 only use the scope for local variables. */
11625 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
11626 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
11627 if (call_line
== NULL
|| call_file
== NULL
)
11629 read_lexical_block_scope (die
, cu
);
11634 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11636 name
= dwarf2_name (die
, cu
);
11638 /* Ignore functions with missing or empty names. These are actually
11639 illegal according to the DWARF standard. */
11642 complaint (&symfile_complaints
,
11643 _("missing name for subprogram DIE at %d"),
11644 to_underlying (die
->sect_off
));
11648 /* Ignore functions with missing or invalid low and high pc attributes. */
11649 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
11650 <= PC_BOUNDS_INVALID
)
11652 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
11653 if (!attr
|| !DW_UNSND (attr
))
11654 complaint (&symfile_complaints
,
11655 _("cannot get low and high bounds "
11656 "for subprogram DIE at %d"),
11657 to_underlying (die
->sect_off
));
11661 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11662 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
11664 /* If we have any template arguments, then we must allocate a
11665 different sort of symbol. */
11666 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
11668 if (child_die
->tag
== DW_TAG_template_type_param
11669 || child_die
->tag
== DW_TAG_template_value_param
)
11671 templ_func
= allocate_template_symbol (objfile
);
11672 templ_func
->base
.is_cplus_template_function
= 1;
11677 newobj
= push_context (0, lowpc
);
11678 newobj
->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
11679 (struct symbol
*) templ_func
);
11681 /* If there is a location expression for DW_AT_frame_base, record
11683 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
11685 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
11687 /* If there is a location for the static link, record it. */
11688 newobj
->static_link
= NULL
;
11689 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
11692 newobj
->static_link
11693 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
11694 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
);
11697 cu
->list_in_scope
= &local_symbols
;
11699 if (die
->child
!= NULL
)
11701 child_die
= die
->child
;
11702 while (child_die
&& child_die
->tag
)
11704 if (child_die
->tag
== DW_TAG_template_type_param
11705 || child_die
->tag
== DW_TAG_template_value_param
)
11707 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
11710 VEC_safe_push (symbolp
, template_args
, arg
);
11713 process_die (child_die
, cu
);
11714 child_die
= sibling_die (child_die
);
11718 inherit_abstract_dies (die
, cu
);
11720 /* If we have a DW_AT_specification, we might need to import using
11721 directives from the context of the specification DIE. See the
11722 comment in determine_prefix. */
11723 if (cu
->language
== language_cplus
11724 && dwarf2_attr (die
, DW_AT_specification
, cu
))
11726 struct dwarf2_cu
*spec_cu
= cu
;
11727 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
11731 child_die
= spec_die
->child
;
11732 while (child_die
&& child_die
->tag
)
11734 if (child_die
->tag
== DW_TAG_imported_module
)
11735 process_die (child_die
, spec_cu
);
11736 child_die
= sibling_die (child_die
);
11739 /* In some cases, GCC generates specification DIEs that
11740 themselves contain DW_AT_specification attributes. */
11741 spec_die
= die_specification (spec_die
, &spec_cu
);
11745 newobj
= pop_context ();
11746 /* Make a block for the local symbols within. */
11747 block
= finish_block (newobj
->name
, &local_symbols
, newobj
->old_blocks
,
11748 newobj
->static_link
, lowpc
, highpc
);
11750 /* For C++, set the block's scope. */
11751 if ((cu
->language
== language_cplus
11752 || cu
->language
== language_fortran
11753 || cu
->language
== language_d
11754 || cu
->language
== language_rust
)
11755 && cu
->processing_has_namespace_info
)
11756 block_set_scope (block
, determine_prefix (die
, cu
),
11757 &objfile
->objfile_obstack
);
11759 /* If we have address ranges, record them. */
11760 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11762 gdbarch_make_symbol_special (gdbarch
, newobj
->name
, objfile
);
11764 /* Attach template arguments to function. */
11765 if (! VEC_empty (symbolp
, template_args
))
11767 gdb_assert (templ_func
!= NULL
);
11769 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
11770 templ_func
->template_arguments
11771 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
11772 templ_func
->n_template_arguments
);
11773 memcpy (templ_func
->template_arguments
,
11774 VEC_address (symbolp
, template_args
),
11775 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
11776 VEC_free (symbolp
, template_args
);
11779 /* In C++, we can have functions nested inside functions (e.g., when
11780 a function declares a class that has methods). This means that
11781 when we finish processing a function scope, we may need to go
11782 back to building a containing block's symbol lists. */
11783 local_symbols
= newobj
->locals
;
11784 local_using_directives
= newobj
->local_using_directives
;
11786 /* If we've finished processing a top-level function, subsequent
11787 symbols go in the file symbol list. */
11788 if (outermost_context_p ())
11789 cu
->list_in_scope
= &file_symbols
;
11792 /* Process all the DIES contained within a lexical block scope. Start
11793 a new scope, process the dies, and then close the scope. */
11796 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11798 struct objfile
*objfile
= cu
->objfile
;
11799 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11800 struct context_stack
*newobj
;
11801 CORE_ADDR lowpc
, highpc
;
11802 struct die_info
*child_die
;
11803 CORE_ADDR baseaddr
;
11805 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11807 /* Ignore blocks with missing or invalid low and high pc attributes. */
11808 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
11809 as multiple lexical blocks? Handling children in a sane way would
11810 be nasty. Might be easier to properly extend generic blocks to
11811 describe ranges. */
11812 switch (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
11814 case PC_BOUNDS_NOT_PRESENT
:
11815 /* DW_TAG_lexical_block has no attributes, process its children as if
11816 there was no wrapping by that DW_TAG_lexical_block.
11817 GCC does no longer produces such DWARF since GCC r224161. */
11818 for (child_die
= die
->child
;
11819 child_die
!= NULL
&& child_die
->tag
;
11820 child_die
= sibling_die (child_die
))
11821 process_die (child_die
, cu
);
11823 case PC_BOUNDS_INVALID
:
11826 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11827 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
11829 push_context (0, lowpc
);
11830 if (die
->child
!= NULL
)
11832 child_die
= die
->child
;
11833 while (child_die
&& child_die
->tag
)
11835 process_die (child_die
, cu
);
11836 child_die
= sibling_die (child_die
);
11839 inherit_abstract_dies (die
, cu
);
11840 newobj
= pop_context ();
11842 if (local_symbols
!= NULL
|| local_using_directives
!= NULL
)
11844 struct block
*block
11845 = finish_block (0, &local_symbols
, newobj
->old_blocks
, NULL
,
11846 newobj
->start_addr
, highpc
);
11848 /* Note that recording ranges after traversing children, as we
11849 do here, means that recording a parent's ranges entails
11850 walking across all its children's ranges as they appear in
11851 the address map, which is quadratic behavior.
11853 It would be nicer to record the parent's ranges before
11854 traversing its children, simply overriding whatever you find
11855 there. But since we don't even decide whether to create a
11856 block until after we've traversed its children, that's hard
11858 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11860 local_symbols
= newobj
->locals
;
11861 local_using_directives
= newobj
->local_using_directives
;
11864 /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */
11867 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11869 struct objfile
*objfile
= cu
->objfile
;
11870 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11871 CORE_ADDR pc
, baseaddr
;
11872 struct attribute
*attr
;
11873 struct call_site
*call_site
, call_site_local
;
11876 struct die_info
*child_die
;
11878 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11880 attr
= dwarf2_attr (die
, DW_AT_call_return_pc
, cu
);
11883 /* This was a pre-DWARF-5 GNU extension alias
11884 for DW_AT_call_return_pc. */
11885 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
11889 complaint (&symfile_complaints
,
11890 _("missing DW_AT_call_return_pc for DW_TAG_call_site "
11891 "DIE 0x%x [in module %s]"),
11892 to_underlying (die
->sect_off
), objfile_name (objfile
));
11895 pc
= attr_value_as_address (attr
) + baseaddr
;
11896 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
11898 if (cu
->call_site_htab
== NULL
)
11899 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
11900 NULL
, &objfile
->objfile_obstack
,
11901 hashtab_obstack_allocate
, NULL
);
11902 call_site_local
.pc
= pc
;
11903 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
11906 complaint (&symfile_complaints
,
11907 _("Duplicate PC %s for DW_TAG_call_site "
11908 "DIE 0x%x [in module %s]"),
11909 paddress (gdbarch
, pc
), to_underlying (die
->sect_off
),
11910 objfile_name (objfile
));
11914 /* Count parameters at the caller. */
11917 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
11918 child_die
= sibling_die (child_die
))
11920 if (child_die
->tag
!= DW_TAG_call_site_parameter
11921 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11923 complaint (&symfile_complaints
,
11924 _("Tag %d is not DW_TAG_call_site_parameter in "
11925 "DW_TAG_call_site child DIE 0x%x [in module %s]"),
11926 child_die
->tag
, to_underlying (child_die
->sect_off
),
11927 objfile_name (objfile
));
11935 = ((struct call_site
*)
11936 obstack_alloc (&objfile
->objfile_obstack
,
11937 sizeof (*call_site
)
11938 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
11940 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
11941 call_site
->pc
= pc
;
11943 if (dwarf2_flag_true_p (die
, DW_AT_call_tail_call
, cu
)
11944 || dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
11946 struct die_info
*func_die
;
11948 /* Skip also over DW_TAG_inlined_subroutine. */
11949 for (func_die
= die
->parent
;
11950 func_die
&& func_die
->tag
!= DW_TAG_subprogram
11951 && func_die
->tag
!= DW_TAG_subroutine_type
;
11952 func_die
= func_die
->parent
);
11954 /* DW_AT_call_all_calls is a superset
11955 of DW_AT_call_all_tail_calls. */
11957 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_calls
, cu
)
11958 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
11959 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_tail_calls
, cu
)
11960 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
11962 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
11963 not complete. But keep CALL_SITE for look ups via call_site_htab,
11964 both the initial caller containing the real return address PC and
11965 the final callee containing the current PC of a chain of tail
11966 calls do not need to have the tail call list complete. But any
11967 function candidate for a virtual tail call frame searched via
11968 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
11969 determined unambiguously. */
11973 struct type
*func_type
= NULL
;
11976 func_type
= get_die_type (func_die
, cu
);
11977 if (func_type
!= NULL
)
11979 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
11981 /* Enlist this call site to the function. */
11982 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
11983 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
11986 complaint (&symfile_complaints
,
11987 _("Cannot find function owning DW_TAG_call_site "
11988 "DIE 0x%x [in module %s]"),
11989 to_underlying (die
->sect_off
), objfile_name (objfile
));
11993 attr
= dwarf2_attr (die
, DW_AT_call_target
, cu
);
11995 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
11997 attr
= dwarf2_attr (die
, DW_AT_call_origin
, cu
);
12000 /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */
12001 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
12003 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
12004 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
12005 /* Keep NULL DWARF_BLOCK. */;
12006 else if (attr_form_is_block (attr
))
12008 struct dwarf2_locexpr_baton
*dlbaton
;
12010 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
12011 dlbaton
->data
= DW_BLOCK (attr
)->data
;
12012 dlbaton
->size
= DW_BLOCK (attr
)->size
;
12013 dlbaton
->per_cu
= cu
->per_cu
;
12015 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
12017 else if (attr_form_is_ref (attr
))
12019 struct dwarf2_cu
*target_cu
= cu
;
12020 struct die_info
*target_die
;
12022 target_die
= follow_die_ref (die
, attr
, &target_cu
);
12023 gdb_assert (target_cu
->objfile
== objfile
);
12024 if (die_is_declaration (target_die
, target_cu
))
12026 const char *target_physname
;
12028 /* Prefer the mangled name; otherwise compute the demangled one. */
12029 target_physname
= dw2_linkage_name (target_die
, target_cu
);
12030 if (target_physname
== NULL
)
12031 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
12032 if (target_physname
== NULL
)
12033 complaint (&symfile_complaints
,
12034 _("DW_AT_call_target target DIE has invalid "
12035 "physname, for referencing DIE 0x%x [in module %s]"),
12036 to_underlying (die
->sect_off
), objfile_name (objfile
));
12038 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
12044 /* DW_AT_entry_pc should be preferred. */
12045 if (dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
)
12046 <= PC_BOUNDS_INVALID
)
12047 complaint (&symfile_complaints
,
12048 _("DW_AT_call_target target DIE has invalid "
12049 "low pc, for referencing DIE 0x%x [in module %s]"),
12050 to_underlying (die
->sect_off
), objfile_name (objfile
));
12053 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
12054 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
12059 complaint (&symfile_complaints
,
12060 _("DW_TAG_call_site DW_AT_call_target is neither "
12061 "block nor reference, for DIE 0x%x [in module %s]"),
12062 to_underlying (die
->sect_off
), objfile_name (objfile
));
12064 call_site
->per_cu
= cu
->per_cu
;
12066 for (child_die
= die
->child
;
12067 child_die
&& child_die
->tag
;
12068 child_die
= sibling_die (child_die
))
12070 struct call_site_parameter
*parameter
;
12071 struct attribute
*loc
, *origin
;
12073 if (child_die
->tag
!= DW_TAG_call_site_parameter
12074 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
12076 /* Already printed the complaint above. */
12080 gdb_assert (call_site
->parameter_count
< nparams
);
12081 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
12083 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
12084 specifies DW_TAG_formal_parameter. Value of the data assumed for the
12085 register is contained in DW_AT_call_value. */
12087 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
12088 origin
= dwarf2_attr (child_die
, DW_AT_call_parameter
, cu
);
12089 if (origin
== NULL
)
12091 /* This was a pre-DWARF-5 GNU extension alias
12092 for DW_AT_call_parameter. */
12093 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
12095 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
12097 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
12099 sect_offset sect_off
12100 = (sect_offset
) dwarf2_get_ref_die_offset (origin
);
12101 if (!offset_in_cu_p (&cu
->header
, sect_off
))
12103 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
12104 binding can be done only inside one CU. Such referenced DIE
12105 therefore cannot be even moved to DW_TAG_partial_unit. */
12106 complaint (&symfile_complaints
,
12107 _("DW_AT_call_parameter offset is not in CU for "
12108 "DW_TAG_call_site child DIE 0x%x [in module %s]"),
12109 to_underlying (child_die
->sect_off
),
12110 objfile_name (objfile
));
12113 parameter
->u
.param_cu_off
12114 = (cu_offset
) (sect_off
- cu
->header
.sect_off
);
12116 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
12118 complaint (&symfile_complaints
,
12119 _("No DW_FORM_block* DW_AT_location for "
12120 "DW_TAG_call_site child DIE 0x%x [in module %s]"),
12121 to_underlying (child_die
->sect_off
), objfile_name (objfile
));
12126 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
12127 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
12128 if (parameter
->u
.dwarf_reg
!= -1)
12129 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
12130 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
12131 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
12132 ¶meter
->u
.fb_offset
))
12133 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
12136 complaint (&symfile_complaints
,
12137 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
12138 "for DW_FORM_block* DW_AT_location is supported for "
12139 "DW_TAG_call_site child DIE 0x%x "
12141 to_underlying (child_die
->sect_off
),
12142 objfile_name (objfile
));
12147 attr
= dwarf2_attr (child_die
, DW_AT_call_value
, cu
);
12149 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
12150 if (!attr_form_is_block (attr
))
12152 complaint (&symfile_complaints
,
12153 _("No DW_FORM_block* DW_AT_call_value for "
12154 "DW_TAG_call_site child DIE 0x%x [in module %s]"),
12155 to_underlying (child_die
->sect_off
),
12156 objfile_name (objfile
));
12159 parameter
->value
= DW_BLOCK (attr
)->data
;
12160 parameter
->value_size
= DW_BLOCK (attr
)->size
;
12162 /* Parameters are not pre-cleared by memset above. */
12163 parameter
->data_value
= NULL
;
12164 parameter
->data_value_size
= 0;
12165 call_site
->parameter_count
++;
12167 attr
= dwarf2_attr (child_die
, DW_AT_call_data_value
, cu
);
12169 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
12172 if (!attr_form_is_block (attr
))
12173 complaint (&symfile_complaints
,
12174 _("No DW_FORM_block* DW_AT_call_data_value for "
12175 "DW_TAG_call_site child DIE 0x%x [in module %s]"),
12176 to_underlying (child_die
->sect_off
),
12177 objfile_name (objfile
));
12180 parameter
->data_value
= DW_BLOCK (attr
)->data
;
12181 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
12187 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET
12188 reading .debug_rnglists.
12189 Callback's type should be:
12190 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
12191 Return true if the attributes are present and valid, otherwise,
12194 template <typename Callback
>
12196 dwarf2_rnglists_process (unsigned offset
, struct dwarf2_cu
*cu
,
12197 Callback
&&callback
)
12199 struct objfile
*objfile
= cu
->objfile
;
12200 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12201 struct comp_unit_head
*cu_header
= &cu
->header
;
12202 bfd
*obfd
= objfile
->obfd
;
12203 unsigned int addr_size
= cu_header
->addr_size
;
12204 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
12205 /* Base address selection entry. */
12208 unsigned int dummy
;
12209 const gdb_byte
*buffer
;
12211 CORE_ADDR high
= 0;
12212 CORE_ADDR baseaddr
;
12213 bool overflow
= false;
12215 found_base
= cu
->base_known
;
12216 base
= cu
->base_address
;
12218 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->rnglists
);
12219 if (offset
>= dwarf2_per_objfile
->rnglists
.size
)
12221 complaint (&symfile_complaints
,
12222 _("Offset %d out of bounds for DW_AT_ranges attribute"),
12226 buffer
= dwarf2_per_objfile
->rnglists
.buffer
+ offset
;
12228 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
12232 /* Initialize it due to a false compiler warning. */
12233 CORE_ADDR range_beginning
= 0, range_end
= 0;
12234 const gdb_byte
*buf_end
= (dwarf2_per_objfile
->rnglists
.buffer
12235 + dwarf2_per_objfile
->rnglists
.size
);
12236 unsigned int bytes_read
;
12238 if (buffer
== buf_end
)
12243 const auto rlet
= static_cast<enum dwarf_range_list_entry
>(*buffer
++);
12246 case DW_RLE_end_of_list
:
12248 case DW_RLE_base_address
:
12249 if (buffer
+ cu
->header
.addr_size
> buf_end
)
12254 base
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12256 buffer
+= bytes_read
;
12258 case DW_RLE_start_length
:
12259 if (buffer
+ cu
->header
.addr_size
> buf_end
)
12264 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12265 buffer
+= bytes_read
;
12266 range_end
= (range_beginning
12267 + read_unsigned_leb128 (obfd
, buffer
, &bytes_read
));
12268 buffer
+= bytes_read
;
12269 if (buffer
> buf_end
)
12275 case DW_RLE_offset_pair
:
12276 range_beginning
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
12277 buffer
+= bytes_read
;
12278 if (buffer
> buf_end
)
12283 range_end
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
12284 buffer
+= bytes_read
;
12285 if (buffer
> buf_end
)
12291 case DW_RLE_start_end
:
12292 if (buffer
+ 2 * cu
->header
.addr_size
> buf_end
)
12297 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12298 buffer
+= bytes_read
;
12299 range_end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12300 buffer
+= bytes_read
;
12303 complaint (&symfile_complaints
,
12304 _("Invalid .debug_rnglists data (no base address)"));
12307 if (rlet
== DW_RLE_end_of_list
|| overflow
)
12309 if (rlet
== DW_RLE_base_address
)
12314 /* We have no valid base address for the ranges
12316 complaint (&symfile_complaints
,
12317 _("Invalid .debug_rnglists data (no base address)"));
12321 if (range_beginning
> range_end
)
12323 /* Inverted range entries are invalid. */
12324 complaint (&symfile_complaints
,
12325 _("Invalid .debug_rnglists data (inverted range)"));
12329 /* Empty range entries have no effect. */
12330 if (range_beginning
== range_end
)
12333 range_beginning
+= base
;
12336 /* A not-uncommon case of bad debug info.
12337 Don't pollute the addrmap with bad data. */
12338 if (range_beginning
+ baseaddr
== 0
12339 && !dwarf2_per_objfile
->has_section_at_zero
)
12341 complaint (&symfile_complaints
,
12342 _(".debug_rnglists entry has start address of zero"
12343 " [in module %s]"), objfile_name (objfile
));
12347 callback (range_beginning
, range_end
);
12352 complaint (&symfile_complaints
,
12353 _("Offset %d is not terminated "
12354 "for DW_AT_ranges attribute"),
12362 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges.
12363 Callback's type should be:
12364 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
12365 Return 1 if the attributes are present and valid, otherwise, return 0. */
12367 template <typename Callback
>
12369 dwarf2_ranges_process (unsigned offset
, struct dwarf2_cu
*cu
,
12370 Callback
&&callback
)
12372 struct objfile
*objfile
= cu
->objfile
;
12373 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12374 struct comp_unit_head
*cu_header
= &cu
->header
;
12375 bfd
*obfd
= objfile
->obfd
;
12376 unsigned int addr_size
= cu_header
->addr_size
;
12377 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
12378 /* Base address selection entry. */
12381 unsigned int dummy
;
12382 const gdb_byte
*buffer
;
12383 CORE_ADDR baseaddr
;
12385 if (cu_header
->version
>= 5)
12386 return dwarf2_rnglists_process (offset
, cu
, callback
);
12388 found_base
= cu
->base_known
;
12389 base
= cu
->base_address
;
12391 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
12392 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
12394 complaint (&symfile_complaints
,
12395 _("Offset %d out of bounds for DW_AT_ranges attribute"),
12399 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
12401 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
12405 CORE_ADDR range_beginning
, range_end
;
12407 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
12408 buffer
+= addr_size
;
12409 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
12410 buffer
+= addr_size
;
12411 offset
+= 2 * addr_size
;
12413 /* An end of list marker is a pair of zero addresses. */
12414 if (range_beginning
== 0 && range_end
== 0)
12415 /* Found the end of list entry. */
12418 /* Each base address selection entry is a pair of 2 values.
12419 The first is the largest possible address, the second is
12420 the base address. Check for a base address here. */
12421 if ((range_beginning
& mask
) == mask
)
12423 /* If we found the largest possible address, then we already
12424 have the base address in range_end. */
12432 /* We have no valid base address for the ranges
12434 complaint (&symfile_complaints
,
12435 _("Invalid .debug_ranges data (no base address)"));
12439 if (range_beginning
> range_end
)
12441 /* Inverted range entries are invalid. */
12442 complaint (&symfile_complaints
,
12443 _("Invalid .debug_ranges data (inverted range)"));
12447 /* Empty range entries have no effect. */
12448 if (range_beginning
== range_end
)
12451 range_beginning
+= base
;
12454 /* A not-uncommon case of bad debug info.
12455 Don't pollute the addrmap with bad data. */
12456 if (range_beginning
+ baseaddr
== 0
12457 && !dwarf2_per_objfile
->has_section_at_zero
)
12459 complaint (&symfile_complaints
,
12460 _(".debug_ranges entry has start address of zero"
12461 " [in module %s]"), objfile_name (objfile
));
12465 callback (range_beginning
, range_end
);
12471 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
12472 Return 1 if the attributes are present and valid, otherwise, return 0.
12473 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
12476 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
12477 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
12478 struct partial_symtab
*ranges_pst
)
12480 struct objfile
*objfile
= cu
->objfile
;
12481 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12482 const CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
12483 SECT_OFF_TEXT (objfile
));
12486 CORE_ADDR high
= 0;
12489 retval
= dwarf2_ranges_process (offset
, cu
,
12490 [&] (CORE_ADDR range_beginning
, CORE_ADDR range_end
)
12492 if (ranges_pst
!= NULL
)
12497 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
12498 range_beginning
+ baseaddr
);
12499 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
12500 range_end
+ baseaddr
);
12501 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
12505 /* FIXME: This is recording everything as a low-high
12506 segment of consecutive addresses. We should have a
12507 data structure for discontiguous block ranges
12511 low
= range_beginning
;
12517 if (range_beginning
< low
)
12518 low
= range_beginning
;
12519 if (range_end
> high
)
12527 /* If the first entry is an end-of-list marker, the range
12528 describes an empty scope, i.e. no instructions. */
12534 *high_return
= high
;
12538 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
12539 definition for the return value. *LOWPC and *HIGHPC are set iff
12540 neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */
12542 static enum pc_bounds_kind
12543 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
12544 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
12545 struct partial_symtab
*pst
)
12547 struct attribute
*attr
;
12548 struct attribute
*attr_high
;
12550 CORE_ADDR high
= 0;
12551 enum pc_bounds_kind ret
;
12553 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
12556 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
12559 low
= attr_value_as_address (attr
);
12560 high
= attr_value_as_address (attr_high
);
12561 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
12565 /* Found high w/o low attribute. */
12566 return PC_BOUNDS_INVALID
;
12568 /* Found consecutive range of addresses. */
12569 ret
= PC_BOUNDS_HIGH_LOW
;
12573 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
12576 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
12577 We take advantage of the fact that DW_AT_ranges does not appear
12578 in DW_TAG_compile_unit of DWO files. */
12579 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
12580 unsigned int ranges_offset
= (DW_UNSND (attr
)
12581 + (need_ranges_base
12585 /* Value of the DW_AT_ranges attribute is the offset in the
12586 .debug_ranges section. */
12587 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
12588 return PC_BOUNDS_INVALID
;
12589 /* Found discontinuous range of addresses. */
12590 ret
= PC_BOUNDS_RANGES
;
12593 return PC_BOUNDS_NOT_PRESENT
;
12596 /* read_partial_die has also the strict LOW < HIGH requirement. */
12598 return PC_BOUNDS_INVALID
;
12600 /* When using the GNU linker, .gnu.linkonce. sections are used to
12601 eliminate duplicate copies of functions and vtables and such.
12602 The linker will arbitrarily choose one and discard the others.
12603 The AT_*_pc values for such functions refer to local labels in
12604 these sections. If the section from that file was discarded, the
12605 labels are not in the output, so the relocs get a value of 0.
12606 If this is a discarded function, mark the pc bounds as invalid,
12607 so that GDB will ignore it. */
12608 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12609 return PC_BOUNDS_INVALID
;
12617 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
12618 its low and high PC addresses. Do nothing if these addresses could not
12619 be determined. Otherwise, set LOWPC to the low address if it is smaller,
12620 and HIGHPC to the high address if greater than HIGHPC. */
12623 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
12624 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
12625 struct dwarf2_cu
*cu
)
12627 CORE_ADDR low
, high
;
12628 struct die_info
*child
= die
->child
;
12630 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
) >= PC_BOUNDS_RANGES
)
12632 *lowpc
= std::min (*lowpc
, low
);
12633 *highpc
= std::max (*highpc
, high
);
12636 /* If the language does not allow nested subprograms (either inside
12637 subprograms or lexical blocks), we're done. */
12638 if (cu
->language
!= language_ada
)
12641 /* Check all the children of the given DIE. If it contains nested
12642 subprograms, then check their pc bounds. Likewise, we need to
12643 check lexical blocks as well, as they may also contain subprogram
12645 while (child
&& child
->tag
)
12647 if (child
->tag
== DW_TAG_subprogram
12648 || child
->tag
== DW_TAG_lexical_block
)
12649 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
12650 child
= sibling_die (child
);
12654 /* Get the low and high pc's represented by the scope DIE, and store
12655 them in *LOWPC and *HIGHPC. If the correct values can't be
12656 determined, set *LOWPC to -1 and *HIGHPC to 0. */
12659 get_scope_pc_bounds (struct die_info
*die
,
12660 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
12661 struct dwarf2_cu
*cu
)
12663 CORE_ADDR best_low
= (CORE_ADDR
) -1;
12664 CORE_ADDR best_high
= (CORE_ADDR
) 0;
12665 CORE_ADDR current_low
, current_high
;
12667 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
12668 >= PC_BOUNDS_RANGES
)
12670 best_low
= current_low
;
12671 best_high
= current_high
;
12675 struct die_info
*child
= die
->child
;
12677 while (child
&& child
->tag
)
12679 switch (child
->tag
) {
12680 case DW_TAG_subprogram
:
12681 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
12683 case DW_TAG_namespace
:
12684 case DW_TAG_module
:
12685 /* FIXME: carlton/2004-01-16: Should we do this for
12686 DW_TAG_class_type/DW_TAG_structure_type, too? I think
12687 that current GCC's always emit the DIEs corresponding
12688 to definitions of methods of classes as children of a
12689 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
12690 the DIEs giving the declarations, which could be
12691 anywhere). But I don't see any reason why the
12692 standards says that they have to be there. */
12693 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
12695 if (current_low
!= ((CORE_ADDR
) -1))
12697 best_low
= std::min (best_low
, current_low
);
12698 best_high
= std::max (best_high
, current_high
);
12706 child
= sibling_die (child
);
12711 *highpc
= best_high
;
12714 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
12718 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
12719 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
12721 struct objfile
*objfile
= cu
->objfile
;
12722 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12723 struct attribute
*attr
;
12724 struct attribute
*attr_high
;
12726 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
12729 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
12732 CORE_ADDR low
= attr_value_as_address (attr
);
12733 CORE_ADDR high
= attr_value_as_address (attr_high
);
12735 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
12738 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
12739 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
12740 record_block_range (block
, low
, high
- 1);
12744 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
12747 bfd
*obfd
= objfile
->obfd
;
12748 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
12749 We take advantage of the fact that DW_AT_ranges does not appear
12750 in DW_TAG_compile_unit of DWO files. */
12751 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
12753 /* The value of the DW_AT_ranges attribute is the offset of the
12754 address range list in the .debug_ranges section. */
12755 unsigned long offset
= (DW_UNSND (attr
)
12756 + (need_ranges_base
? cu
->ranges_base
: 0));
12757 const gdb_byte
*buffer
;
12759 /* For some target architectures, but not others, the
12760 read_address function sign-extends the addresses it returns.
12761 To recognize base address selection entries, we need a
12763 unsigned int addr_size
= cu
->header
.addr_size
;
12764 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
12766 /* The base address, to which the next pair is relative. Note
12767 that this 'base' is a DWARF concept: most entries in a range
12768 list are relative, to reduce the number of relocs against the
12769 debugging information. This is separate from this function's
12770 'baseaddr' argument, which GDB uses to relocate debugging
12771 information from a shared library based on the address at
12772 which the library was loaded. */
12773 CORE_ADDR base
= cu
->base_address
;
12774 int base_known
= cu
->base_known
;
12776 dwarf2_ranges_process (offset
, cu
,
12777 [&] (CORE_ADDR start
, CORE_ADDR end
)
12781 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
12782 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
12783 record_block_range (block
, start
, end
- 1);
12788 /* Check whether the producer field indicates either of GCC < 4.6, or the
12789 Intel C/C++ compiler, and cache the result in CU. */
12792 check_producer (struct dwarf2_cu
*cu
)
12796 if (cu
->producer
== NULL
)
12798 /* For unknown compilers expect their behavior is DWARF version
12801 GCC started to support .debug_types sections by -gdwarf-4 since
12802 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
12803 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
12804 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
12805 interpreted incorrectly by GDB now - GCC PR debug/48229. */
12807 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
12809 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
12810 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
12812 else if (producer_is_icc (cu
->producer
, &major
, &minor
))
12813 cu
->producer_is_icc_lt_14
= major
< 14;
12816 /* For other non-GCC compilers, expect their behavior is DWARF version
12820 cu
->checked_producer
= 1;
12823 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
12824 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
12825 during 4.6.0 experimental. */
12828 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
12830 if (!cu
->checked_producer
)
12831 check_producer (cu
);
12833 return cu
->producer_is_gxx_lt_4_6
;
12836 /* Return the default accessibility type if it is not overriden by
12837 DW_AT_accessibility. */
12839 static enum dwarf_access_attribute
12840 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
12842 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
12844 /* The default DWARF 2 accessibility for members is public, the default
12845 accessibility for inheritance is private. */
12847 if (die
->tag
!= DW_TAG_inheritance
)
12848 return DW_ACCESS_public
;
12850 return DW_ACCESS_private
;
12854 /* DWARF 3+ defines the default accessibility a different way. The same
12855 rules apply now for DW_TAG_inheritance as for the members and it only
12856 depends on the container kind. */
12858 if (die
->parent
->tag
== DW_TAG_class_type
)
12859 return DW_ACCESS_private
;
12861 return DW_ACCESS_public
;
12865 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
12866 offset. If the attribute was not found return 0, otherwise return
12867 1. If it was found but could not properly be handled, set *OFFSET
12871 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
12874 struct attribute
*attr
;
12876 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
12881 /* Note that we do not check for a section offset first here.
12882 This is because DW_AT_data_member_location is new in DWARF 4,
12883 so if we see it, we can assume that a constant form is really
12884 a constant and not a section offset. */
12885 if (attr_form_is_constant (attr
))
12886 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
12887 else if (attr_form_is_section_offset (attr
))
12888 dwarf2_complex_location_expr_complaint ();
12889 else if (attr_form_is_block (attr
))
12890 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12892 dwarf2_complex_location_expr_complaint ();
12900 /* Add an aggregate field to the field list. */
12903 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
12904 struct dwarf2_cu
*cu
)
12906 struct objfile
*objfile
= cu
->objfile
;
12907 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12908 struct nextfield
*new_field
;
12909 struct attribute
*attr
;
12911 const char *fieldname
= "";
12913 /* Allocate a new field list entry and link it in. */
12914 new_field
= XNEW (struct nextfield
);
12915 make_cleanup (xfree
, new_field
);
12916 memset (new_field
, 0, sizeof (struct nextfield
));
12918 if (die
->tag
== DW_TAG_inheritance
)
12920 new_field
->next
= fip
->baseclasses
;
12921 fip
->baseclasses
= new_field
;
12925 new_field
->next
= fip
->fields
;
12926 fip
->fields
= new_field
;
12930 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
12932 new_field
->accessibility
= DW_UNSND (attr
);
12934 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
12935 if (new_field
->accessibility
!= DW_ACCESS_public
)
12936 fip
->non_public_fields
= 1;
12938 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
12940 new_field
->virtuality
= DW_UNSND (attr
);
12942 new_field
->virtuality
= DW_VIRTUALITY_none
;
12944 fp
= &new_field
->field
;
12946 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
12950 /* Data member other than a C++ static data member. */
12952 /* Get type of field. */
12953 fp
->type
= die_type (die
, cu
);
12955 SET_FIELD_BITPOS (*fp
, 0);
12957 /* Get bit size of field (zero if none). */
12958 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
12961 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
12965 FIELD_BITSIZE (*fp
) = 0;
12968 /* Get bit offset of field. */
12969 if (handle_data_member_location (die
, cu
, &offset
))
12970 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
12971 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
12974 if (gdbarch_bits_big_endian (gdbarch
))
12976 /* For big endian bits, the DW_AT_bit_offset gives the
12977 additional bit offset from the MSB of the containing
12978 anonymous object to the MSB of the field. We don't
12979 have to do anything special since we don't need to
12980 know the size of the anonymous object. */
12981 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
12985 /* For little endian bits, compute the bit offset to the
12986 MSB of the anonymous object, subtract off the number of
12987 bits from the MSB of the field to the MSB of the
12988 object, and then subtract off the number of bits of
12989 the field itself. The result is the bit offset of
12990 the LSB of the field. */
12991 int anonymous_size
;
12992 int bit_offset
= DW_UNSND (attr
);
12994 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12997 /* The size of the anonymous object containing
12998 the bit field is explicit, so use the
12999 indicated size (in bytes). */
13000 anonymous_size
= DW_UNSND (attr
);
13004 /* The size of the anonymous object containing
13005 the bit field must be inferred from the type
13006 attribute of the data member containing the
13008 anonymous_size
= TYPE_LENGTH (fp
->type
);
13010 SET_FIELD_BITPOS (*fp
,
13011 (FIELD_BITPOS (*fp
)
13012 + anonymous_size
* bits_per_byte
13013 - bit_offset
- FIELD_BITSIZE (*fp
)));
13016 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
13018 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
13019 + dwarf2_get_attr_constant_value (attr
, 0)));
13021 /* Get name of field. */
13022 fieldname
= dwarf2_name (die
, cu
);
13023 if (fieldname
== NULL
)
13026 /* The name is already allocated along with this objfile, so we don't
13027 need to duplicate it for the type. */
13028 fp
->name
= fieldname
;
13030 /* Change accessibility for artificial fields (e.g. virtual table
13031 pointer or virtual base class pointer) to private. */
13032 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
13034 FIELD_ARTIFICIAL (*fp
) = 1;
13035 new_field
->accessibility
= DW_ACCESS_private
;
13036 fip
->non_public_fields
= 1;
13039 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
13041 /* C++ static member. */
13043 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
13044 is a declaration, but all versions of G++ as of this writing
13045 (so through at least 3.2.1) incorrectly generate
13046 DW_TAG_variable tags. */
13048 const char *physname
;
13050 /* Get name of field. */
13051 fieldname
= dwarf2_name (die
, cu
);
13052 if (fieldname
== NULL
)
13055 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
13057 /* Only create a symbol if this is an external value.
13058 new_symbol checks this and puts the value in the global symbol
13059 table, which we want. If it is not external, new_symbol
13060 will try to put the value in cu->list_in_scope which is wrong. */
13061 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
13063 /* A static const member, not much different than an enum as far as
13064 we're concerned, except that we can support more types. */
13065 new_symbol (die
, NULL
, cu
);
13068 /* Get physical name. */
13069 physname
= dwarf2_physname (fieldname
, die
, cu
);
13071 /* The name is already allocated along with this objfile, so we don't
13072 need to duplicate it for the type. */
13073 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
13074 FIELD_TYPE (*fp
) = die_type (die
, cu
);
13075 FIELD_NAME (*fp
) = fieldname
;
13077 else if (die
->tag
== DW_TAG_inheritance
)
13081 /* C++ base class field. */
13082 if (handle_data_member_location (die
, cu
, &offset
))
13083 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
13084 FIELD_BITSIZE (*fp
) = 0;
13085 FIELD_TYPE (*fp
) = die_type (die
, cu
);
13086 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
13087 fip
->nbaseclasses
++;
13091 /* Add a typedef defined in the scope of the FIP's class. */
13094 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
13095 struct dwarf2_cu
*cu
)
13097 struct typedef_field_list
*new_field
;
13098 struct typedef_field
*fp
;
13100 /* Allocate a new field list entry and link it in. */
13101 new_field
= XCNEW (struct typedef_field_list
);
13102 make_cleanup (xfree
, new_field
);
13104 gdb_assert (die
->tag
== DW_TAG_typedef
);
13106 fp
= &new_field
->field
;
13108 /* Get name of field. */
13109 fp
->name
= dwarf2_name (die
, cu
);
13110 if (fp
->name
== NULL
)
13113 fp
->type
= read_type_die (die
, cu
);
13115 /* Save accessibility. */
13116 enum dwarf_access_attribute accessibility
;
13117 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
13119 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
13121 accessibility
= dwarf2_default_access_attribute (die
, cu
);
13122 switch (accessibility
)
13124 case DW_ACCESS_public
:
13125 /* The assumed value if neither private nor protected. */
13127 case DW_ACCESS_private
:
13128 fp
->is_private
= 1;
13130 case DW_ACCESS_protected
:
13131 fp
->is_protected
= 1;
13134 gdb_assert_not_reached ("unexpected accessibility attribute");
13137 new_field
->next
= fip
->typedef_field_list
;
13138 fip
->typedef_field_list
= new_field
;
13139 fip
->typedef_field_list_count
++;
13142 /* Create the vector of fields, and attach it to the type. */
13145 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
13146 struct dwarf2_cu
*cu
)
13148 int nfields
= fip
->nfields
;
13150 /* Record the field count, allocate space for the array of fields,
13151 and create blank accessibility bitfields if necessary. */
13152 TYPE_NFIELDS (type
) = nfields
;
13153 TYPE_FIELDS (type
) = (struct field
*)
13154 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
13155 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
13157 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
13159 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13161 TYPE_FIELD_PRIVATE_BITS (type
) =
13162 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
13163 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
13165 TYPE_FIELD_PROTECTED_BITS (type
) =
13166 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
13167 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
13169 TYPE_FIELD_IGNORE_BITS (type
) =
13170 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
13171 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
13174 /* If the type has baseclasses, allocate and clear a bit vector for
13175 TYPE_FIELD_VIRTUAL_BITS. */
13176 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
13178 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
13179 unsigned char *pointer
;
13181 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13182 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
13183 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
13184 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
13185 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
13188 /* Copy the saved-up fields into the field vector. Start from the head of
13189 the list, adding to the tail of the field array, so that they end up in
13190 the same order in the array in which they were added to the list. */
13191 while (nfields
-- > 0)
13193 struct nextfield
*fieldp
;
13197 fieldp
= fip
->fields
;
13198 fip
->fields
= fieldp
->next
;
13202 fieldp
= fip
->baseclasses
;
13203 fip
->baseclasses
= fieldp
->next
;
13206 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
13207 switch (fieldp
->accessibility
)
13209 case DW_ACCESS_private
:
13210 if (cu
->language
!= language_ada
)
13211 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
13214 case DW_ACCESS_protected
:
13215 if (cu
->language
!= language_ada
)
13216 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
13219 case DW_ACCESS_public
:
13223 /* Unknown accessibility. Complain and treat it as public. */
13225 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
13226 fieldp
->accessibility
);
13230 if (nfields
< fip
->nbaseclasses
)
13232 switch (fieldp
->virtuality
)
13234 case DW_VIRTUALITY_virtual
:
13235 case DW_VIRTUALITY_pure_virtual
:
13236 if (cu
->language
== language_ada
)
13237 error (_("unexpected virtuality in component of Ada type"));
13238 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
13245 /* Return true if this member function is a constructor, false
13249 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
13251 const char *fieldname
;
13252 const char *type_name
;
13255 if (die
->parent
== NULL
)
13258 if (die
->parent
->tag
!= DW_TAG_structure_type
13259 && die
->parent
->tag
!= DW_TAG_union_type
13260 && die
->parent
->tag
!= DW_TAG_class_type
)
13263 fieldname
= dwarf2_name (die
, cu
);
13264 type_name
= dwarf2_name (die
->parent
, cu
);
13265 if (fieldname
== NULL
|| type_name
== NULL
)
13268 len
= strlen (fieldname
);
13269 return (strncmp (fieldname
, type_name
, len
) == 0
13270 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
13273 /* Add a member function to the proper fieldlist. */
13276 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
13277 struct type
*type
, struct dwarf2_cu
*cu
)
13279 struct objfile
*objfile
= cu
->objfile
;
13280 struct attribute
*attr
;
13281 struct fnfieldlist
*flp
;
13283 struct fn_field
*fnp
;
13284 const char *fieldname
;
13285 struct nextfnfield
*new_fnfield
;
13286 struct type
*this_type
;
13287 enum dwarf_access_attribute accessibility
;
13289 if (cu
->language
== language_ada
)
13290 error (_("unexpected member function in Ada type"));
13292 /* Get name of member function. */
13293 fieldname
= dwarf2_name (die
, cu
);
13294 if (fieldname
== NULL
)
13297 /* Look up member function name in fieldlist. */
13298 for (i
= 0; i
< fip
->nfnfields
; i
++)
13300 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
13304 /* Create new list element if necessary. */
13305 if (i
< fip
->nfnfields
)
13306 flp
= &fip
->fnfieldlists
[i
];
13309 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
13311 fip
->fnfieldlists
= (struct fnfieldlist
*)
13312 xrealloc (fip
->fnfieldlists
,
13313 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
13314 * sizeof (struct fnfieldlist
));
13315 if (fip
->nfnfields
== 0)
13316 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
13318 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
13319 flp
->name
= fieldname
;
13322 i
= fip
->nfnfields
++;
13325 /* Create a new member function field and chain it to the field list
13327 new_fnfield
= XNEW (struct nextfnfield
);
13328 make_cleanup (xfree
, new_fnfield
);
13329 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
13330 new_fnfield
->next
= flp
->head
;
13331 flp
->head
= new_fnfield
;
13334 /* Fill in the member function field info. */
13335 fnp
= &new_fnfield
->fnfield
;
13337 /* Delay processing of the physname until later. */
13338 if (cu
->language
== language_cplus
)
13340 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
13345 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
13346 fnp
->physname
= physname
? physname
: "";
13349 fnp
->type
= alloc_type (objfile
);
13350 this_type
= read_type_die (die
, cu
);
13351 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
13353 int nparams
= TYPE_NFIELDS (this_type
);
13355 /* TYPE is the domain of this method, and THIS_TYPE is the type
13356 of the method itself (TYPE_CODE_METHOD). */
13357 smash_to_method_type (fnp
->type
, type
,
13358 TYPE_TARGET_TYPE (this_type
),
13359 TYPE_FIELDS (this_type
),
13360 TYPE_NFIELDS (this_type
),
13361 TYPE_VARARGS (this_type
));
13363 /* Handle static member functions.
13364 Dwarf2 has no clean way to discern C++ static and non-static
13365 member functions. G++ helps GDB by marking the first
13366 parameter for non-static member functions (which is the this
13367 pointer) as artificial. We obtain this information from
13368 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
13369 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
13370 fnp
->voffset
= VOFFSET_STATIC
;
13373 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
13374 dwarf2_full_name (fieldname
, die
, cu
));
13376 /* Get fcontext from DW_AT_containing_type if present. */
13377 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
13378 fnp
->fcontext
= die_containing_type (die
, cu
);
13380 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
13381 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
13383 /* Get accessibility. */
13384 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
13386 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
13388 accessibility
= dwarf2_default_access_attribute (die
, cu
);
13389 switch (accessibility
)
13391 case DW_ACCESS_private
:
13392 fnp
->is_private
= 1;
13394 case DW_ACCESS_protected
:
13395 fnp
->is_protected
= 1;
13399 /* Check for artificial methods. */
13400 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
13401 if (attr
&& DW_UNSND (attr
) != 0)
13402 fnp
->is_artificial
= 1;
13404 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
13406 /* Get index in virtual function table if it is a virtual member
13407 function. For older versions of GCC, this is an offset in the
13408 appropriate virtual table, as specified by DW_AT_containing_type.
13409 For everyone else, it is an expression to be evaluated relative
13410 to the object address. */
13412 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
13415 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
13417 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
13419 /* Old-style GCC. */
13420 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
13422 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
13423 || (DW_BLOCK (attr
)->size
> 1
13424 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
13425 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
13427 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
13428 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
13429 dwarf2_complex_location_expr_complaint ();
13431 fnp
->voffset
/= cu
->header
.addr_size
;
13435 dwarf2_complex_location_expr_complaint ();
13437 if (!fnp
->fcontext
)
13439 /* If there is no `this' field and no DW_AT_containing_type,
13440 we cannot actually find a base class context for the
13442 if (TYPE_NFIELDS (this_type
) == 0
13443 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
13445 complaint (&symfile_complaints
,
13446 _("cannot determine context for virtual member "
13447 "function \"%s\" (offset %d)"),
13448 fieldname
, to_underlying (die
->sect_off
));
13453 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
13457 else if (attr_form_is_section_offset (attr
))
13459 dwarf2_complex_location_expr_complaint ();
13463 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
13469 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
13470 if (attr
&& DW_UNSND (attr
))
13472 /* GCC does this, as of 2008-08-25; PR debug/37237. */
13473 complaint (&symfile_complaints
,
13474 _("Member function \"%s\" (offset %d) is virtual "
13475 "but the vtable offset is not specified"),
13476 fieldname
, to_underlying (die
->sect_off
));
13477 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13478 TYPE_CPLUS_DYNAMIC (type
) = 1;
13483 /* Create the vector of member function fields, and attach it to the type. */
13486 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
13487 struct dwarf2_cu
*cu
)
13489 struct fnfieldlist
*flp
;
13492 if (cu
->language
== language_ada
)
13493 error (_("unexpected member functions in Ada type"));
13495 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13496 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
13497 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
13499 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
13501 struct nextfnfield
*nfp
= flp
->head
;
13502 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
13505 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
13506 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
13507 fn_flp
->fn_fields
= (struct fn_field
*)
13508 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
13509 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
13510 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
13513 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
13516 /* Returns non-zero if NAME is the name of a vtable member in CU's
13517 language, zero otherwise. */
13519 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
13521 static const char vptr
[] = "_vptr";
13522 static const char vtable
[] = "vtable";
13524 /* Look for the C++ form of the vtable. */
13525 if (startswith (name
, vptr
) && is_cplus_marker (name
[sizeof (vptr
) - 1]))
13531 /* GCC outputs unnamed structures that are really pointers to member
13532 functions, with the ABI-specified layout. If TYPE describes
13533 such a structure, smash it into a member function type.
13535 GCC shouldn't do this; it should just output pointer to member DIEs.
13536 This is GCC PR debug/28767. */
13539 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
13541 struct type
*pfn_type
, *self_type
, *new_type
;
13543 /* Check for a structure with no name and two children. */
13544 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
13547 /* Check for __pfn and __delta members. */
13548 if (TYPE_FIELD_NAME (type
, 0) == NULL
13549 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
13550 || TYPE_FIELD_NAME (type
, 1) == NULL
13551 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
13554 /* Find the type of the method. */
13555 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
13556 if (pfn_type
== NULL
13557 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
13558 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
13561 /* Look for the "this" argument. */
13562 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
13563 if (TYPE_NFIELDS (pfn_type
) == 0
13564 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
13565 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
13568 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
13569 new_type
= alloc_type (objfile
);
13570 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
13571 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
13572 TYPE_VARARGS (pfn_type
));
13573 smash_to_methodptr_type (type
, new_type
);
13577 /* Called when we find the DIE that starts a structure or union scope
13578 (definition) to create a type for the structure or union. Fill in
13579 the type's name and general properties; the members will not be
13580 processed until process_structure_scope. A symbol table entry for
13581 the type will also not be done until process_structure_scope (assuming
13582 the type has a name).
13584 NOTE: we need to call these functions regardless of whether or not the
13585 DIE has a DW_AT_name attribute, since it might be an anonymous
13586 structure or union. This gets the type entered into our set of
13587 user defined types. */
13589 static struct type
*
13590 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13592 struct objfile
*objfile
= cu
->objfile
;
13594 struct attribute
*attr
;
13597 /* If the definition of this type lives in .debug_types, read that type.
13598 Don't follow DW_AT_specification though, that will take us back up
13599 the chain and we want to go down. */
13600 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
13603 type
= get_DW_AT_signature_type (die
, attr
, cu
);
13605 /* The type's CU may not be the same as CU.
13606 Ensure TYPE is recorded with CU in die_type_hash. */
13607 return set_die_type (die
, type
, cu
);
13610 type
= alloc_type (objfile
);
13611 INIT_CPLUS_SPECIFIC (type
);
13613 name
= dwarf2_name (die
, cu
);
13616 if (cu
->language
== language_cplus
13617 || cu
->language
== language_d
13618 || cu
->language
== language_rust
)
13620 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
13622 /* dwarf2_full_name might have already finished building the DIE's
13623 type. If so, there is no need to continue. */
13624 if (get_die_type (die
, cu
) != NULL
)
13625 return get_die_type (die
, cu
);
13627 TYPE_TAG_NAME (type
) = full_name
;
13628 if (die
->tag
== DW_TAG_structure_type
13629 || die
->tag
== DW_TAG_class_type
)
13630 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
13634 /* The name is already allocated along with this objfile, so
13635 we don't need to duplicate it for the type. */
13636 TYPE_TAG_NAME (type
) = name
;
13637 if (die
->tag
== DW_TAG_class_type
)
13638 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
13642 if (die
->tag
== DW_TAG_structure_type
)
13644 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13646 else if (die
->tag
== DW_TAG_union_type
)
13648 TYPE_CODE (type
) = TYPE_CODE_UNION
;
13652 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13655 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
13656 TYPE_DECLARED_CLASS (type
) = 1;
13658 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13661 if (attr_form_is_constant (attr
))
13662 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13665 /* For the moment, dynamic type sizes are not supported
13666 by GDB's struct type. The actual size is determined
13667 on-demand when resolving the type of a given object,
13668 so set the type's length to zero for now. Otherwise,
13669 we record an expression as the length, and that expression
13670 could lead to a very large value, which could eventually
13671 lead to us trying to allocate that much memory when creating
13672 a value of that type. */
13673 TYPE_LENGTH (type
) = 0;
13678 TYPE_LENGTH (type
) = 0;
13681 if (producer_is_icc_lt_14 (cu
) && (TYPE_LENGTH (type
) == 0))
13683 /* ICC<14 does not output the required DW_AT_declaration on
13684 incomplete types, but gives them a size of zero. */
13685 TYPE_STUB (type
) = 1;
13688 TYPE_STUB_SUPPORTED (type
) = 1;
13690 if (die_is_declaration (die
, cu
))
13691 TYPE_STUB (type
) = 1;
13692 else if (attr
== NULL
&& die
->child
== NULL
13693 && producer_is_realview (cu
->producer
))
13694 /* RealView does not output the required DW_AT_declaration
13695 on incomplete types. */
13696 TYPE_STUB (type
) = 1;
13698 /* We need to add the type field to the die immediately so we don't
13699 infinitely recurse when dealing with pointers to the structure
13700 type within the structure itself. */
13701 set_die_type (die
, type
, cu
);
13703 /* set_die_type should be already done. */
13704 set_descriptive_type (type
, die
, cu
);
13709 /* Finish creating a structure or union type, including filling in
13710 its members and creating a symbol for it. */
13713 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13715 struct objfile
*objfile
= cu
->objfile
;
13716 struct die_info
*child_die
;
13719 type
= get_die_type (die
, cu
);
13721 type
= read_structure_type (die
, cu
);
13723 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
13725 struct field_info fi
;
13726 VEC (symbolp
) *template_args
= NULL
;
13727 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
13729 memset (&fi
, 0, sizeof (struct field_info
));
13731 child_die
= die
->child
;
13733 while (child_die
&& child_die
->tag
)
13735 if (child_die
->tag
== DW_TAG_member
13736 || child_die
->tag
== DW_TAG_variable
)
13738 /* NOTE: carlton/2002-11-05: A C++ static data member
13739 should be a DW_TAG_member that is a declaration, but
13740 all versions of G++ as of this writing (so through at
13741 least 3.2.1) incorrectly generate DW_TAG_variable
13742 tags for them instead. */
13743 dwarf2_add_field (&fi
, child_die
, cu
);
13745 else if (child_die
->tag
== DW_TAG_subprogram
)
13747 /* Rust doesn't have member functions in the C++ sense.
13748 However, it does emit ordinary functions as children
13749 of a struct DIE. */
13750 if (cu
->language
== language_rust
)
13751 read_func_scope (child_die
, cu
);
13754 /* C++ member function. */
13755 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
13758 else if (child_die
->tag
== DW_TAG_inheritance
)
13760 /* C++ base class field. */
13761 dwarf2_add_field (&fi
, child_die
, cu
);
13763 else if (child_die
->tag
== DW_TAG_typedef
)
13764 dwarf2_add_typedef (&fi
, child_die
, cu
);
13765 else if (child_die
->tag
== DW_TAG_template_type_param
13766 || child_die
->tag
== DW_TAG_template_value_param
)
13768 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13771 VEC_safe_push (symbolp
, template_args
, arg
);
13774 child_die
= sibling_die (child_die
);
13777 /* Attach template arguments to type. */
13778 if (! VEC_empty (symbolp
, template_args
))
13780 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13781 TYPE_N_TEMPLATE_ARGUMENTS (type
)
13782 = VEC_length (symbolp
, template_args
);
13783 TYPE_TEMPLATE_ARGUMENTS (type
)
13784 = XOBNEWVEC (&objfile
->objfile_obstack
,
13786 TYPE_N_TEMPLATE_ARGUMENTS (type
));
13787 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
13788 VEC_address (symbolp
, template_args
),
13789 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
13790 * sizeof (struct symbol
*)));
13791 VEC_free (symbolp
, template_args
);
13794 /* Attach fields and member functions to the type. */
13796 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
13799 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
13801 /* Get the type which refers to the base class (possibly this
13802 class itself) which contains the vtable pointer for the current
13803 class from the DW_AT_containing_type attribute. This use of
13804 DW_AT_containing_type is a GNU extension. */
13806 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
13808 struct type
*t
= die_containing_type (die
, cu
);
13810 set_type_vptr_basetype (type
, t
);
13815 /* Our own class provides vtbl ptr. */
13816 for (i
= TYPE_NFIELDS (t
) - 1;
13817 i
>= TYPE_N_BASECLASSES (t
);
13820 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
13822 if (is_vtable_name (fieldname
, cu
))
13824 set_type_vptr_fieldno (type
, i
);
13829 /* Complain if virtual function table field not found. */
13830 if (i
< TYPE_N_BASECLASSES (t
))
13831 complaint (&symfile_complaints
,
13832 _("virtual function table pointer "
13833 "not found when defining class '%s'"),
13834 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
13839 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
13842 else if (cu
->producer
13843 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
13845 /* The IBM XLC compiler does not provide direct indication
13846 of the containing type, but the vtable pointer is
13847 always named __vfp. */
13851 for (i
= TYPE_NFIELDS (type
) - 1;
13852 i
>= TYPE_N_BASECLASSES (type
);
13855 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
13857 set_type_vptr_fieldno (type
, i
);
13858 set_type_vptr_basetype (type
, type
);
13865 /* Copy fi.typedef_field_list linked list elements content into the
13866 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
13867 if (fi
.typedef_field_list
)
13869 int i
= fi
.typedef_field_list_count
;
13871 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13872 TYPE_TYPEDEF_FIELD_ARRAY (type
)
13873 = ((struct typedef_field
*)
13874 TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
));
13875 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
13877 /* Reverse the list order to keep the debug info elements order. */
13880 struct typedef_field
*dest
, *src
;
13882 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
13883 src
= &fi
.typedef_field_list
->field
;
13884 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
13889 do_cleanups (back_to
);
13892 quirk_gcc_member_function_pointer (type
, objfile
);
13894 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
13895 snapshots) has been known to create a die giving a declaration
13896 for a class that has, as a child, a die giving a definition for a
13897 nested class. So we have to process our children even if the
13898 current die is a declaration. Normally, of course, a declaration
13899 won't have any children at all. */
13901 child_die
= die
->child
;
13903 while (child_die
!= NULL
&& child_die
->tag
)
13905 if (child_die
->tag
== DW_TAG_member
13906 || child_die
->tag
== DW_TAG_variable
13907 || child_die
->tag
== DW_TAG_inheritance
13908 || child_die
->tag
== DW_TAG_template_value_param
13909 || child_die
->tag
== DW_TAG_template_type_param
)
13914 process_die (child_die
, cu
);
13916 child_die
= sibling_die (child_die
);
13919 /* Do not consider external references. According to the DWARF standard,
13920 these DIEs are identified by the fact that they have no byte_size
13921 attribute, and a declaration attribute. */
13922 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
13923 || !die_is_declaration (die
, cu
))
13924 new_symbol (die
, type
, cu
);
13927 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
13928 update TYPE using some information only available in DIE's children. */
13931 update_enumeration_type_from_children (struct die_info
*die
,
13933 struct dwarf2_cu
*cu
)
13935 struct die_info
*child_die
;
13936 int unsigned_enum
= 1;
13940 auto_obstack obstack
;
13942 for (child_die
= die
->child
;
13943 child_die
!= NULL
&& child_die
->tag
;
13944 child_die
= sibling_die (child_die
))
13946 struct attribute
*attr
;
13948 const gdb_byte
*bytes
;
13949 struct dwarf2_locexpr_baton
*baton
;
13952 if (child_die
->tag
!= DW_TAG_enumerator
)
13955 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
13959 name
= dwarf2_name (child_die
, cu
);
13961 name
= "<anonymous enumerator>";
13963 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
13964 &value
, &bytes
, &baton
);
13970 else if ((mask
& value
) != 0)
13975 /* If we already know that the enum type is neither unsigned, nor
13976 a flag type, no need to look at the rest of the enumerates. */
13977 if (!unsigned_enum
&& !flag_enum
)
13982 TYPE_UNSIGNED (type
) = 1;
13984 TYPE_FLAG_ENUM (type
) = 1;
13987 /* Given a DW_AT_enumeration_type die, set its type. We do not
13988 complete the type's fields yet, or create any symbols. */
13990 static struct type
*
13991 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13993 struct objfile
*objfile
= cu
->objfile
;
13995 struct attribute
*attr
;
13998 /* If the definition of this type lives in .debug_types, read that type.
13999 Don't follow DW_AT_specification though, that will take us back up
14000 the chain and we want to go down. */
14001 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
14004 type
= get_DW_AT_signature_type (die
, attr
, cu
);
14006 /* The type's CU may not be the same as CU.
14007 Ensure TYPE is recorded with CU in die_type_hash. */
14008 return set_die_type (die
, type
, cu
);
14011 type
= alloc_type (objfile
);
14013 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
14014 name
= dwarf2_full_name (NULL
, die
, cu
);
14016 TYPE_TAG_NAME (type
) = name
;
14018 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
14021 struct type
*underlying_type
= die_type (die
, cu
);
14023 TYPE_TARGET_TYPE (type
) = underlying_type
;
14026 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14029 TYPE_LENGTH (type
) = DW_UNSND (attr
);
14033 TYPE_LENGTH (type
) = 0;
14036 /* The enumeration DIE can be incomplete. In Ada, any type can be
14037 declared as private in the package spec, and then defined only
14038 inside the package body. Such types are known as Taft Amendment
14039 Types. When another package uses such a type, an incomplete DIE
14040 may be generated by the compiler. */
14041 if (die_is_declaration (die
, cu
))
14042 TYPE_STUB (type
) = 1;
14044 /* Finish the creation of this type by using the enum's children.
14045 We must call this even when the underlying type has been provided
14046 so that we can determine if we're looking at a "flag" enum. */
14047 update_enumeration_type_from_children (die
, type
, cu
);
14049 /* If this type has an underlying type that is not a stub, then we
14050 may use its attributes. We always use the "unsigned" attribute
14051 in this situation, because ordinarily we guess whether the type
14052 is unsigned -- but the guess can be wrong and the underlying type
14053 can tell us the reality. However, we defer to a local size
14054 attribute if one exists, because this lets the compiler override
14055 the underlying type if needed. */
14056 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
14058 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
14059 if (TYPE_LENGTH (type
) == 0)
14060 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
14063 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
14065 return set_die_type (die
, type
, cu
);
14068 /* Given a pointer to a die which begins an enumeration, process all
14069 the dies that define the members of the enumeration, and create the
14070 symbol for the enumeration type.
14072 NOTE: We reverse the order of the element list. */
14075 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
14077 struct type
*this_type
;
14079 this_type
= get_die_type (die
, cu
);
14080 if (this_type
== NULL
)
14081 this_type
= read_enumeration_type (die
, cu
);
14083 if (die
->child
!= NULL
)
14085 struct die_info
*child_die
;
14086 struct symbol
*sym
;
14087 struct field
*fields
= NULL
;
14088 int num_fields
= 0;
14091 child_die
= die
->child
;
14092 while (child_die
&& child_die
->tag
)
14094 if (child_die
->tag
!= DW_TAG_enumerator
)
14096 process_die (child_die
, cu
);
14100 name
= dwarf2_name (child_die
, cu
);
14103 sym
= new_symbol (child_die
, this_type
, cu
);
14105 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
14107 fields
= (struct field
*)
14109 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
14110 * sizeof (struct field
));
14113 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
14114 FIELD_TYPE (fields
[num_fields
]) = NULL
;
14115 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
14116 FIELD_BITSIZE (fields
[num_fields
]) = 0;
14122 child_die
= sibling_die (child_die
);
14127 TYPE_NFIELDS (this_type
) = num_fields
;
14128 TYPE_FIELDS (this_type
) = (struct field
*)
14129 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
14130 memcpy (TYPE_FIELDS (this_type
), fields
,
14131 sizeof (struct field
) * num_fields
);
14136 /* If we are reading an enum from a .debug_types unit, and the enum
14137 is a declaration, and the enum is not the signatured type in the
14138 unit, then we do not want to add a symbol for it. Adding a
14139 symbol would in some cases obscure the true definition of the
14140 enum, giving users an incomplete type when the definition is
14141 actually available. Note that we do not want to do this for all
14142 enums which are just declarations, because C++0x allows forward
14143 enum declarations. */
14144 if (cu
->per_cu
->is_debug_types
14145 && die_is_declaration (die
, cu
))
14147 struct signatured_type
*sig_type
;
14149 sig_type
= (struct signatured_type
*) cu
->per_cu
;
14150 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
14151 if (sig_type
->type_offset_in_section
!= die
->sect_off
)
14155 new_symbol (die
, this_type
, cu
);
14158 /* Extract all information from a DW_TAG_array_type DIE and put it in
14159 the DIE's type field. For now, this only handles one dimensional
14162 static struct type
*
14163 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14165 struct objfile
*objfile
= cu
->objfile
;
14166 struct die_info
*child_die
;
14168 struct type
*element_type
, *range_type
, *index_type
;
14169 struct attribute
*attr
;
14171 unsigned int bit_stride
= 0;
14173 element_type
= die_type (die
, cu
);
14175 /* The die_type call above may have already set the type for this DIE. */
14176 type
= get_die_type (die
, cu
);
14180 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
14182 bit_stride
= DW_UNSND (attr
) * 8;
14184 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
14186 bit_stride
= DW_UNSND (attr
);
14188 /* Irix 6.2 native cc creates array types without children for
14189 arrays with unspecified length. */
14190 if (die
->child
== NULL
)
14192 index_type
= objfile_type (objfile
)->builtin_int
;
14193 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
14194 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
14196 return set_die_type (die
, type
, cu
);
14199 std::vector
<struct type
*> range_types
;
14200 child_die
= die
->child
;
14201 while (child_die
&& child_die
->tag
)
14203 if (child_die
->tag
== DW_TAG_subrange_type
)
14205 struct type
*child_type
= read_type_die (child_die
, cu
);
14207 if (child_type
!= NULL
)
14209 /* The range type was succesfully read. Save it for the
14210 array type creation. */
14211 range_types
.push_back (child_type
);
14214 child_die
= sibling_die (child_die
);
14217 /* Dwarf2 dimensions are output from left to right, create the
14218 necessary array types in backwards order. */
14220 type
= element_type
;
14222 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
14226 while (i
< range_types
.size ())
14227 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
14232 size_t ndim
= range_types
.size ();
14234 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
14238 /* Understand Dwarf2 support for vector types (like they occur on
14239 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
14240 array type. This is not part of the Dwarf2/3 standard yet, but a
14241 custom vendor extension. The main difference between a regular
14242 array and the vector variant is that vectors are passed by value
14244 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
14246 make_vector_type (type
);
14248 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
14249 implementation may choose to implement triple vectors using this
14251 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14254 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
14255 TYPE_LENGTH (type
) = DW_UNSND (attr
);
14257 complaint (&symfile_complaints
,
14258 _("DW_AT_byte_size for array type smaller "
14259 "than the total size of elements"));
14262 name
= dwarf2_name (die
, cu
);
14264 TYPE_NAME (type
) = name
;
14266 /* Install the type in the die. */
14267 set_die_type (die
, type
, cu
);
14269 /* set_die_type should be already done. */
14270 set_descriptive_type (type
, die
, cu
);
14275 static enum dwarf_array_dim_ordering
14276 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
14278 struct attribute
*attr
;
14280 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
14283 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
14285 /* GNU F77 is a special case, as at 08/2004 array type info is the
14286 opposite order to the dwarf2 specification, but data is still
14287 laid out as per normal fortran.
14289 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
14290 version checking. */
14292 if (cu
->language
== language_fortran
14293 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
14295 return DW_ORD_row_major
;
14298 switch (cu
->language_defn
->la_array_ordering
)
14300 case array_column_major
:
14301 return DW_ORD_col_major
;
14302 case array_row_major
:
14304 return DW_ORD_row_major
;
14308 /* Extract all information from a DW_TAG_set_type DIE and put it in
14309 the DIE's type field. */
14311 static struct type
*
14312 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14314 struct type
*domain_type
, *set_type
;
14315 struct attribute
*attr
;
14317 domain_type
= die_type (die
, cu
);
14319 /* The die_type call above may have already set the type for this DIE. */
14320 set_type
= get_die_type (die
, cu
);
14324 set_type
= create_set_type (NULL
, domain_type
);
14326 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14328 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
14330 return set_die_type (die
, set_type
, cu
);
14333 /* A helper for read_common_block that creates a locexpr baton.
14334 SYM is the symbol which we are marking as computed.
14335 COMMON_DIE is the DIE for the common block.
14336 COMMON_LOC is the location expression attribute for the common
14338 MEMBER_LOC is the location expression attribute for the particular
14339 member of the common block that we are processing.
14340 CU is the CU from which the above come. */
14343 mark_common_block_symbol_computed (struct symbol
*sym
,
14344 struct die_info
*common_die
,
14345 struct attribute
*common_loc
,
14346 struct attribute
*member_loc
,
14347 struct dwarf2_cu
*cu
)
14349 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14350 struct dwarf2_locexpr_baton
*baton
;
14352 unsigned int cu_off
;
14353 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
14354 LONGEST offset
= 0;
14356 gdb_assert (common_loc
&& member_loc
);
14357 gdb_assert (attr_form_is_block (common_loc
));
14358 gdb_assert (attr_form_is_block (member_loc
)
14359 || attr_form_is_constant (member_loc
));
14361 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
14362 baton
->per_cu
= cu
->per_cu
;
14363 gdb_assert (baton
->per_cu
);
14365 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
14367 if (attr_form_is_constant (member_loc
))
14369 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
14370 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
14373 baton
->size
+= DW_BLOCK (member_loc
)->size
;
14375 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
14378 *ptr
++ = DW_OP_call4
;
14379 cu_off
= common_die
->sect_off
- cu
->per_cu
->sect_off
;
14380 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
14383 if (attr_form_is_constant (member_loc
))
14385 *ptr
++ = DW_OP_addr
;
14386 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
14387 ptr
+= cu
->header
.addr_size
;
14391 /* We have to copy the data here, because DW_OP_call4 will only
14392 use a DW_AT_location attribute. */
14393 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
14394 ptr
+= DW_BLOCK (member_loc
)->size
;
14397 *ptr
++ = DW_OP_plus
;
14398 gdb_assert (ptr
- baton
->data
== baton
->size
);
14400 SYMBOL_LOCATION_BATON (sym
) = baton
;
14401 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
14404 /* Create appropriate locally-scoped variables for all the
14405 DW_TAG_common_block entries. Also create a struct common_block
14406 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
14407 is used to sepate the common blocks name namespace from regular
14411 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
14413 struct attribute
*attr
;
14415 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
14418 /* Support the .debug_loc offsets. */
14419 if (attr_form_is_block (attr
))
14423 else if (attr_form_is_section_offset (attr
))
14425 dwarf2_complex_location_expr_complaint ();
14430 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
14431 "common block member");
14436 if (die
->child
!= NULL
)
14438 struct objfile
*objfile
= cu
->objfile
;
14439 struct die_info
*child_die
;
14440 size_t n_entries
= 0, size
;
14441 struct common_block
*common_block
;
14442 struct symbol
*sym
;
14444 for (child_die
= die
->child
;
14445 child_die
&& child_die
->tag
;
14446 child_die
= sibling_die (child_die
))
14449 size
= (sizeof (struct common_block
)
14450 + (n_entries
- 1) * sizeof (struct symbol
*));
14452 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
14454 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
14455 common_block
->n_entries
= 0;
14457 for (child_die
= die
->child
;
14458 child_die
&& child_die
->tag
;
14459 child_die
= sibling_die (child_die
))
14461 /* Create the symbol in the DW_TAG_common_block block in the current
14463 sym
= new_symbol (child_die
, NULL
, cu
);
14466 struct attribute
*member_loc
;
14468 common_block
->contents
[common_block
->n_entries
++] = sym
;
14470 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
14474 /* GDB has handled this for a long time, but it is
14475 not specified by DWARF. It seems to have been
14476 emitted by gfortran at least as recently as:
14477 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
14478 complaint (&symfile_complaints
,
14479 _("Variable in common block has "
14480 "DW_AT_data_member_location "
14481 "- DIE at 0x%x [in module %s]"),
14482 to_underlying (child_die
->sect_off
),
14483 objfile_name (cu
->objfile
));
14485 if (attr_form_is_section_offset (member_loc
))
14486 dwarf2_complex_location_expr_complaint ();
14487 else if (attr_form_is_constant (member_loc
)
14488 || attr_form_is_block (member_loc
))
14491 mark_common_block_symbol_computed (sym
, die
, attr
,
14495 dwarf2_complex_location_expr_complaint ();
14500 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
14501 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
14505 /* Create a type for a C++ namespace. */
14507 static struct type
*
14508 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14510 struct objfile
*objfile
= cu
->objfile
;
14511 const char *previous_prefix
, *name
;
14515 /* For extensions, reuse the type of the original namespace. */
14516 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
14518 struct die_info
*ext_die
;
14519 struct dwarf2_cu
*ext_cu
= cu
;
14521 ext_die
= dwarf2_extension (die
, &ext_cu
);
14522 type
= read_type_die (ext_die
, ext_cu
);
14524 /* EXT_CU may not be the same as CU.
14525 Ensure TYPE is recorded with CU in die_type_hash. */
14526 return set_die_type (die
, type
, cu
);
14529 name
= namespace_name (die
, &is_anonymous
, cu
);
14531 /* Now build the name of the current namespace. */
14533 previous_prefix
= determine_prefix (die
, cu
);
14534 if (previous_prefix
[0] != '\0')
14535 name
= typename_concat (&objfile
->objfile_obstack
,
14536 previous_prefix
, name
, 0, cu
);
14538 /* Create the type. */
14539 type
= init_type (objfile
, TYPE_CODE_NAMESPACE
, 0, name
);
14540 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
14542 return set_die_type (die
, type
, cu
);
14545 /* Read a namespace scope. */
14548 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
14550 struct objfile
*objfile
= cu
->objfile
;
14553 /* Add a symbol associated to this if we haven't seen the namespace
14554 before. Also, add a using directive if it's an anonymous
14557 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
14561 type
= read_type_die (die
, cu
);
14562 new_symbol (die
, type
, cu
);
14564 namespace_name (die
, &is_anonymous
, cu
);
14567 const char *previous_prefix
= determine_prefix (die
, cu
);
14569 std::vector
<const char *> excludes
;
14570 add_using_directive (using_directives (cu
->language
),
14571 previous_prefix
, TYPE_NAME (type
), NULL
,
14572 NULL
, excludes
, 0, &objfile
->objfile_obstack
);
14576 if (die
->child
!= NULL
)
14578 struct die_info
*child_die
= die
->child
;
14580 while (child_die
&& child_die
->tag
)
14582 process_die (child_die
, cu
);
14583 child_die
= sibling_die (child_die
);
14588 /* Read a Fortran module as type. This DIE can be only a declaration used for
14589 imported module. Still we need that type as local Fortran "use ... only"
14590 declaration imports depend on the created type in determine_prefix. */
14592 static struct type
*
14593 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14595 struct objfile
*objfile
= cu
->objfile
;
14596 const char *module_name
;
14599 module_name
= dwarf2_name (die
, cu
);
14601 complaint (&symfile_complaints
,
14602 _("DW_TAG_module has no name, offset 0x%x"),
14603 to_underlying (die
->sect_off
));
14604 type
= init_type (objfile
, TYPE_CODE_MODULE
, 0, module_name
);
14606 /* determine_prefix uses TYPE_TAG_NAME. */
14607 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
14609 return set_die_type (die
, type
, cu
);
14612 /* Read a Fortran module. */
14615 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
14617 struct die_info
*child_die
= die
->child
;
14620 type
= read_type_die (die
, cu
);
14621 new_symbol (die
, type
, cu
);
14623 while (child_die
&& child_die
->tag
)
14625 process_die (child_die
, cu
);
14626 child_die
= sibling_die (child_die
);
14630 /* Return the name of the namespace represented by DIE. Set
14631 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
14634 static const char *
14635 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
14637 struct die_info
*current_die
;
14638 const char *name
= NULL
;
14640 /* Loop through the extensions until we find a name. */
14642 for (current_die
= die
;
14643 current_die
!= NULL
;
14644 current_die
= dwarf2_extension (die
, &cu
))
14646 /* We don't use dwarf2_name here so that we can detect the absence
14647 of a name -> anonymous namespace. */
14648 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
14654 /* Is it an anonymous namespace? */
14656 *is_anonymous
= (name
== NULL
);
14658 name
= CP_ANONYMOUS_NAMESPACE_STR
;
14663 /* Extract all information from a DW_TAG_pointer_type DIE and add to
14664 the user defined type vector. */
14666 static struct type
*
14667 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14669 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
14670 struct comp_unit_head
*cu_header
= &cu
->header
;
14672 struct attribute
*attr_byte_size
;
14673 struct attribute
*attr_address_class
;
14674 int byte_size
, addr_class
;
14675 struct type
*target_type
;
14677 target_type
= die_type (die
, cu
);
14679 /* The die_type call above may have already set the type for this DIE. */
14680 type
= get_die_type (die
, cu
);
14684 type
= lookup_pointer_type (target_type
);
14686 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14687 if (attr_byte_size
)
14688 byte_size
= DW_UNSND (attr_byte_size
);
14690 byte_size
= cu_header
->addr_size
;
14692 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
14693 if (attr_address_class
)
14694 addr_class
= DW_UNSND (attr_address_class
);
14696 addr_class
= DW_ADDR_none
;
14698 /* If the pointer size or address class is different than the
14699 default, create a type variant marked as such and set the
14700 length accordingly. */
14701 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
14703 if (gdbarch_address_class_type_flags_p (gdbarch
))
14707 type_flags
= gdbarch_address_class_type_flags
14708 (gdbarch
, byte_size
, addr_class
);
14709 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
14711 type
= make_type_with_address_space (type
, type_flags
);
14713 else if (TYPE_LENGTH (type
) != byte_size
)
14715 complaint (&symfile_complaints
,
14716 _("invalid pointer size %d"), byte_size
);
14720 /* Should we also complain about unhandled address classes? */
14724 TYPE_LENGTH (type
) = byte_size
;
14725 return set_die_type (die
, type
, cu
);
14728 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
14729 the user defined type vector. */
14731 static struct type
*
14732 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14735 struct type
*to_type
;
14736 struct type
*domain
;
14738 to_type
= die_type (die
, cu
);
14739 domain
= die_containing_type (die
, cu
);
14741 /* The calls above may have already set the type for this DIE. */
14742 type
= get_die_type (die
, cu
);
14746 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
14747 type
= lookup_methodptr_type (to_type
);
14748 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
14750 struct type
*new_type
= alloc_type (cu
->objfile
);
14752 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
14753 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
14754 TYPE_VARARGS (to_type
));
14755 type
= lookup_methodptr_type (new_type
);
14758 type
= lookup_memberptr_type (to_type
, domain
);
14760 return set_die_type (die
, type
, cu
);
14763 /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to
14764 the user defined type vector. */
14766 static struct type
*
14767 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
14768 enum type_code refcode
)
14770 struct comp_unit_head
*cu_header
= &cu
->header
;
14771 struct type
*type
, *target_type
;
14772 struct attribute
*attr
;
14774 gdb_assert (refcode
== TYPE_CODE_REF
|| refcode
== TYPE_CODE_RVALUE_REF
);
14776 target_type
= die_type (die
, cu
);
14778 /* The die_type call above may have already set the type for this DIE. */
14779 type
= get_die_type (die
, cu
);
14783 type
= lookup_reference_type (target_type
, refcode
);
14784 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14787 TYPE_LENGTH (type
) = DW_UNSND (attr
);
14791 TYPE_LENGTH (type
) = cu_header
->addr_size
;
14793 return set_die_type (die
, type
, cu
);
14796 /* Add the given cv-qualifiers to the element type of the array. GCC
14797 outputs DWARF type qualifiers that apply to an array, not the
14798 element type. But GDB relies on the array element type to carry
14799 the cv-qualifiers. This mimics section 6.7.3 of the C99
14802 static struct type
*
14803 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
14804 struct type
*base_type
, int cnst
, int voltl
)
14806 struct type
*el_type
, *inner_array
;
14808 base_type
= copy_type (base_type
);
14809 inner_array
= base_type
;
14811 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
14813 TYPE_TARGET_TYPE (inner_array
) =
14814 copy_type (TYPE_TARGET_TYPE (inner_array
));
14815 inner_array
= TYPE_TARGET_TYPE (inner_array
);
14818 el_type
= TYPE_TARGET_TYPE (inner_array
);
14819 cnst
|= TYPE_CONST (el_type
);
14820 voltl
|= TYPE_VOLATILE (el_type
);
14821 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
14823 return set_die_type (die
, base_type
, cu
);
14826 static struct type
*
14827 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14829 struct type
*base_type
, *cv_type
;
14831 base_type
= die_type (die
, cu
);
14833 /* The die_type call above may have already set the type for this DIE. */
14834 cv_type
= get_die_type (die
, cu
);
14838 /* In case the const qualifier is applied to an array type, the element type
14839 is so qualified, not the array type (section 6.7.3 of C99). */
14840 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14841 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
14843 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
14844 return set_die_type (die
, cv_type
, cu
);
14847 static struct type
*
14848 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14850 struct type
*base_type
, *cv_type
;
14852 base_type
= die_type (die
, cu
);
14854 /* The die_type call above may have already set the type for this DIE. */
14855 cv_type
= get_die_type (die
, cu
);
14859 /* In case the volatile qualifier is applied to an array type, the
14860 element type is so qualified, not the array type (section 6.7.3
14862 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14863 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
14865 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
14866 return set_die_type (die
, cv_type
, cu
);
14869 /* Handle DW_TAG_restrict_type. */
14871 static struct type
*
14872 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14874 struct type
*base_type
, *cv_type
;
14876 base_type
= die_type (die
, cu
);
14878 /* The die_type call above may have already set the type for this DIE. */
14879 cv_type
= get_die_type (die
, cu
);
14883 cv_type
= make_restrict_type (base_type
);
14884 return set_die_type (die
, cv_type
, cu
);
14887 /* Handle DW_TAG_atomic_type. */
14889 static struct type
*
14890 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14892 struct type
*base_type
, *cv_type
;
14894 base_type
= die_type (die
, cu
);
14896 /* The die_type call above may have already set the type for this DIE. */
14897 cv_type
= get_die_type (die
, cu
);
14901 cv_type
= make_atomic_type (base_type
);
14902 return set_die_type (die
, cv_type
, cu
);
14905 /* Extract all information from a DW_TAG_string_type DIE and add to
14906 the user defined type vector. It isn't really a user defined type,
14907 but it behaves like one, with other DIE's using an AT_user_def_type
14908 attribute to reference it. */
14910 static struct type
*
14911 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14913 struct objfile
*objfile
= cu
->objfile
;
14914 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14915 struct type
*type
, *range_type
, *index_type
, *char_type
;
14916 struct attribute
*attr
;
14917 unsigned int length
;
14919 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
14922 length
= DW_UNSND (attr
);
14926 /* Check for the DW_AT_byte_size attribute. */
14927 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14930 length
= DW_UNSND (attr
);
14938 index_type
= objfile_type (objfile
)->builtin_int
;
14939 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
14940 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
14941 type
= create_string_type (NULL
, char_type
, range_type
);
14943 return set_die_type (die
, type
, cu
);
14946 /* Assuming that DIE corresponds to a function, returns nonzero
14947 if the function is prototyped. */
14950 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
14952 struct attribute
*attr
;
14954 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
14955 if (attr
&& (DW_UNSND (attr
) != 0))
14958 /* The DWARF standard implies that the DW_AT_prototyped attribute
14959 is only meaninful for C, but the concept also extends to other
14960 languages that allow unprototyped functions (Eg: Objective C).
14961 For all other languages, assume that functions are always
14963 if (cu
->language
!= language_c
14964 && cu
->language
!= language_objc
14965 && cu
->language
!= language_opencl
)
14968 /* RealView does not emit DW_AT_prototyped. We can not distinguish
14969 prototyped and unprototyped functions; default to prototyped,
14970 since that is more common in modern code (and RealView warns
14971 about unprototyped functions). */
14972 if (producer_is_realview (cu
->producer
))
14978 /* Handle DIES due to C code like:
14982 int (*funcp)(int a, long l);
14986 ('funcp' generates a DW_TAG_subroutine_type DIE). */
14988 static struct type
*
14989 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14991 struct objfile
*objfile
= cu
->objfile
;
14992 struct type
*type
; /* Type that this function returns. */
14993 struct type
*ftype
; /* Function that returns above type. */
14994 struct attribute
*attr
;
14996 type
= die_type (die
, cu
);
14998 /* The die_type call above may have already set the type for this DIE. */
14999 ftype
= get_die_type (die
, cu
);
15003 ftype
= lookup_function_type (type
);
15005 if (prototyped_function_p (die
, cu
))
15006 TYPE_PROTOTYPED (ftype
) = 1;
15008 /* Store the calling convention in the type if it's available in
15009 the subroutine die. Otherwise set the calling convention to
15010 the default value DW_CC_normal. */
15011 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
15013 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
15014 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
15015 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
15017 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
15019 /* Record whether the function returns normally to its caller or not
15020 if the DWARF producer set that information. */
15021 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
15022 if (attr
&& (DW_UNSND (attr
) != 0))
15023 TYPE_NO_RETURN (ftype
) = 1;
15025 /* We need to add the subroutine type to the die immediately so
15026 we don't infinitely recurse when dealing with parameters
15027 declared as the same subroutine type. */
15028 set_die_type (die
, ftype
, cu
);
15030 if (die
->child
!= NULL
)
15032 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
15033 struct die_info
*child_die
;
15034 int nparams
, iparams
;
15036 /* Count the number of parameters.
15037 FIXME: GDB currently ignores vararg functions, but knows about
15038 vararg member functions. */
15040 child_die
= die
->child
;
15041 while (child_die
&& child_die
->tag
)
15043 if (child_die
->tag
== DW_TAG_formal_parameter
)
15045 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
15046 TYPE_VARARGS (ftype
) = 1;
15047 child_die
= sibling_die (child_die
);
15050 /* Allocate storage for parameters and fill them in. */
15051 TYPE_NFIELDS (ftype
) = nparams
;
15052 TYPE_FIELDS (ftype
) = (struct field
*)
15053 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
15055 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
15056 even if we error out during the parameters reading below. */
15057 for (iparams
= 0; iparams
< nparams
; iparams
++)
15058 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
15061 child_die
= die
->child
;
15062 while (child_die
&& child_die
->tag
)
15064 if (child_die
->tag
== DW_TAG_formal_parameter
)
15066 struct type
*arg_type
;
15068 /* DWARF version 2 has no clean way to discern C++
15069 static and non-static member functions. G++ helps
15070 GDB by marking the first parameter for non-static
15071 member functions (which is the this pointer) as
15072 artificial. We pass this information to
15073 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
15075 DWARF version 3 added DW_AT_object_pointer, which GCC
15076 4.5 does not yet generate. */
15077 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
15079 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
15081 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
15082 arg_type
= die_type (child_die
, cu
);
15084 /* RealView does not mark THIS as const, which the testsuite
15085 expects. GCC marks THIS as const in method definitions,
15086 but not in the class specifications (GCC PR 43053). */
15087 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
15088 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
15091 struct dwarf2_cu
*arg_cu
= cu
;
15092 const char *name
= dwarf2_name (child_die
, cu
);
15094 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
15097 /* If the compiler emits this, use it. */
15098 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
15101 else if (name
&& strcmp (name
, "this") == 0)
15102 /* Function definitions will have the argument names. */
15104 else if (name
== NULL
&& iparams
== 0)
15105 /* Declarations may not have the names, so like
15106 elsewhere in GDB, assume an artificial first
15107 argument is "this". */
15111 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
15115 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
15118 child_die
= sibling_die (child_die
);
15125 static struct type
*
15126 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
15128 struct objfile
*objfile
= cu
->objfile
;
15129 const char *name
= NULL
;
15130 struct type
*this_type
, *target_type
;
15132 name
= dwarf2_full_name (NULL
, die
, cu
);
15133 this_type
= init_type (objfile
, TYPE_CODE_TYPEDEF
, 0, name
);
15134 TYPE_TARGET_STUB (this_type
) = 1;
15135 set_die_type (die
, this_type
, cu
);
15136 target_type
= die_type (die
, cu
);
15137 if (target_type
!= this_type
)
15138 TYPE_TARGET_TYPE (this_type
) = target_type
;
15141 /* Self-referential typedefs are, it seems, not allowed by the DWARF
15142 spec and cause infinite loops in GDB. */
15143 complaint (&symfile_complaints
,
15144 _("Self-referential DW_TAG_typedef "
15145 "- DIE at 0x%x [in module %s]"),
15146 to_underlying (die
->sect_off
), objfile_name (objfile
));
15147 TYPE_TARGET_TYPE (this_type
) = NULL
;
15152 /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT
15153 (which may be different from NAME) to the architecture back-end to allow
15154 it to guess the correct format if necessary. */
15156 static struct type
*
15157 dwarf2_init_float_type (struct objfile
*objfile
, int bits
, const char *name
,
15158 const char *name_hint
)
15160 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15161 const struct floatformat
**format
;
15164 format
= gdbarch_floatformat_for_type (gdbarch
, name_hint
, bits
);
15166 type
= init_float_type (objfile
, bits
, name
, format
);
15168 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
15173 /* Find a representation of a given base type and install
15174 it in the TYPE field of the die. */
15176 static struct type
*
15177 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15179 struct objfile
*objfile
= cu
->objfile
;
15181 struct attribute
*attr
;
15182 int encoding
= 0, bits
= 0;
15185 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
15188 encoding
= DW_UNSND (attr
);
15190 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15193 bits
= DW_UNSND (attr
) * TARGET_CHAR_BIT
;
15195 name
= dwarf2_name (die
, cu
);
15198 complaint (&symfile_complaints
,
15199 _("DW_AT_name missing from DW_TAG_base_type"));
15204 case DW_ATE_address
:
15205 /* Turn DW_ATE_address into a void * pointer. */
15206 type
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
15207 type
= init_pointer_type (objfile
, bits
, name
, type
);
15209 case DW_ATE_boolean
:
15210 type
= init_boolean_type (objfile
, bits
, 1, name
);
15212 case DW_ATE_complex_float
:
15213 type
= dwarf2_init_float_type (objfile
, bits
/ 2, NULL
, name
);
15214 type
= init_complex_type (objfile
, name
, type
);
15216 case DW_ATE_decimal_float
:
15217 type
= init_decfloat_type (objfile
, bits
, name
);
15220 type
= dwarf2_init_float_type (objfile
, bits
, name
, name
);
15222 case DW_ATE_signed
:
15223 type
= init_integer_type (objfile
, bits
, 0, name
);
15225 case DW_ATE_unsigned
:
15226 if (cu
->language
== language_fortran
15228 && startswith (name
, "character("))
15229 type
= init_character_type (objfile
, bits
, 1, name
);
15231 type
= init_integer_type (objfile
, bits
, 1, name
);
15233 case DW_ATE_signed_char
:
15234 if (cu
->language
== language_ada
|| cu
->language
== language_m2
15235 || cu
->language
== language_pascal
15236 || cu
->language
== language_fortran
)
15237 type
= init_character_type (objfile
, bits
, 0, name
);
15239 type
= init_integer_type (objfile
, bits
, 0, name
);
15241 case DW_ATE_unsigned_char
:
15242 if (cu
->language
== language_ada
|| cu
->language
== language_m2
15243 || cu
->language
== language_pascal
15244 || cu
->language
== language_fortran
15245 || cu
->language
== language_rust
)
15246 type
= init_character_type (objfile
, bits
, 1, name
);
15248 type
= init_integer_type (objfile
, bits
, 1, name
);
15252 gdbarch
*arch
= get_objfile_arch (objfile
);
15255 type
= builtin_type (arch
)->builtin_char16
;
15256 else if (bits
== 32)
15257 type
= builtin_type (arch
)->builtin_char32
;
15260 complaint (&symfile_complaints
,
15261 _("unsupported DW_ATE_UTF bit size: '%d'"),
15263 type
= init_integer_type (objfile
, bits
, 1, name
);
15265 return set_die_type (die
, type
, cu
);
15270 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
15271 dwarf_type_encoding_name (encoding
));
15272 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
15276 if (name
&& strcmp (name
, "char") == 0)
15277 TYPE_NOSIGN (type
) = 1;
15279 return set_die_type (die
, type
, cu
);
15282 /* Parse dwarf attribute if it's a block, reference or constant and put the
15283 resulting value of the attribute into struct bound_prop.
15284 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
15287 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
15288 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
)
15290 struct dwarf2_property_baton
*baton
;
15291 struct obstack
*obstack
= &cu
->objfile
->objfile_obstack
;
15293 if (attr
== NULL
|| prop
== NULL
)
15296 if (attr_form_is_block (attr
))
15298 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
15299 baton
->referenced_type
= NULL
;
15300 baton
->locexpr
.per_cu
= cu
->per_cu
;
15301 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
15302 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
15303 prop
->data
.baton
= baton
;
15304 prop
->kind
= PROP_LOCEXPR
;
15305 gdb_assert (prop
->data
.baton
!= NULL
);
15307 else if (attr_form_is_ref (attr
))
15309 struct dwarf2_cu
*target_cu
= cu
;
15310 struct die_info
*target_die
;
15311 struct attribute
*target_attr
;
15313 target_die
= follow_die_ref (die
, attr
, &target_cu
);
15314 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
15315 if (target_attr
== NULL
)
15316 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
15318 if (target_attr
== NULL
)
15321 switch (target_attr
->name
)
15323 case DW_AT_location
:
15324 if (attr_form_is_section_offset (target_attr
))
15326 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
15327 baton
->referenced_type
= die_type (target_die
, target_cu
);
15328 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
15329 prop
->data
.baton
= baton
;
15330 prop
->kind
= PROP_LOCLIST
;
15331 gdb_assert (prop
->data
.baton
!= NULL
);
15333 else if (attr_form_is_block (target_attr
))
15335 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
15336 baton
->referenced_type
= die_type (target_die
, target_cu
);
15337 baton
->locexpr
.per_cu
= cu
->per_cu
;
15338 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
15339 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
15340 prop
->data
.baton
= baton
;
15341 prop
->kind
= PROP_LOCEXPR
;
15342 gdb_assert (prop
->data
.baton
!= NULL
);
15346 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
15347 "dynamic property");
15351 case DW_AT_data_member_location
:
15355 if (!handle_data_member_location (target_die
, target_cu
,
15359 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
15360 baton
->referenced_type
= read_type_die (target_die
->parent
,
15362 baton
->offset_info
.offset
= offset
;
15363 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
15364 prop
->data
.baton
= baton
;
15365 prop
->kind
= PROP_ADDR_OFFSET
;
15370 else if (attr_form_is_constant (attr
))
15372 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
15373 prop
->kind
= PROP_CONST
;
15377 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
15378 dwarf2_name (die
, cu
));
15385 /* Read the given DW_AT_subrange DIE. */
15387 static struct type
*
15388 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15390 struct type
*base_type
, *orig_base_type
;
15391 struct type
*range_type
;
15392 struct attribute
*attr
;
15393 struct dynamic_prop low
, high
;
15394 int low_default_is_valid
;
15395 int high_bound_is_count
= 0;
15397 LONGEST negative_mask
;
15399 orig_base_type
= die_type (die
, cu
);
15400 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
15401 whereas the real type might be. So, we use ORIG_BASE_TYPE when
15402 creating the range type, but we use the result of check_typedef
15403 when examining properties of the type. */
15404 base_type
= check_typedef (orig_base_type
);
15406 /* The die_type call above may have already set the type for this DIE. */
15407 range_type
= get_die_type (die
, cu
);
15411 low
.kind
= PROP_CONST
;
15412 high
.kind
= PROP_CONST
;
15413 high
.data
.const_val
= 0;
15415 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
15416 omitting DW_AT_lower_bound. */
15417 switch (cu
->language
)
15420 case language_cplus
:
15421 low
.data
.const_val
= 0;
15422 low_default_is_valid
= 1;
15424 case language_fortran
:
15425 low
.data
.const_val
= 1;
15426 low_default_is_valid
= 1;
15429 case language_objc
:
15430 case language_rust
:
15431 low
.data
.const_val
= 0;
15432 low_default_is_valid
= (cu
->header
.version
>= 4);
15436 case language_pascal
:
15437 low
.data
.const_val
= 1;
15438 low_default_is_valid
= (cu
->header
.version
>= 4);
15441 low
.data
.const_val
= 0;
15442 low_default_is_valid
= 0;
15446 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
15448 attr_to_dynamic_prop (attr
, die
, cu
, &low
);
15449 else if (!low_default_is_valid
)
15450 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
15451 "- DIE at 0x%x [in module %s]"),
15452 to_underlying (die
->sect_off
), objfile_name (cu
->objfile
));
15454 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
15455 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
))
15457 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
15458 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
))
15460 /* If bounds are constant do the final calculation here. */
15461 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
15462 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
15464 high_bound_is_count
= 1;
15468 /* Dwarf-2 specifications explicitly allows to create subrange types
15469 without specifying a base type.
15470 In that case, the base type must be set to the type of
15471 the lower bound, upper bound or count, in that order, if any of these
15472 three attributes references an object that has a type.
15473 If no base type is found, the Dwarf-2 specifications say that
15474 a signed integer type of size equal to the size of an address should
15476 For the following C code: `extern char gdb_int [];'
15477 GCC produces an empty range DIE.
15478 FIXME: muller/2010-05-28: Possible references to object for low bound,
15479 high bound or count are not yet handled by this code. */
15480 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
15482 struct objfile
*objfile
= cu
->objfile
;
15483 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15484 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
15485 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
15487 /* Test "int", "long int", and "long long int" objfile types,
15488 and select the first one having a size above or equal to the
15489 architecture address size. */
15490 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15491 base_type
= int_type
;
15494 int_type
= objfile_type (objfile
)->builtin_long
;
15495 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15496 base_type
= int_type
;
15499 int_type
= objfile_type (objfile
)->builtin_long_long
;
15500 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15501 base_type
= int_type
;
15506 /* Normally, the DWARF producers are expected to use a signed
15507 constant form (Eg. DW_FORM_sdata) to express negative bounds.
15508 But this is unfortunately not always the case, as witnessed
15509 with GCC, for instance, where the ambiguous DW_FORM_dataN form
15510 is used instead. To work around that ambiguity, we treat
15511 the bounds as signed, and thus sign-extend their values, when
15512 the base type is signed. */
15514 -((LONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
15515 if (low
.kind
== PROP_CONST
15516 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
15517 low
.data
.const_val
|= negative_mask
;
15518 if (high
.kind
== PROP_CONST
15519 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
15520 high
.data
.const_val
|= negative_mask
;
15522 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
);
15524 if (high_bound_is_count
)
15525 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
15527 /* Ada expects an empty array on no boundary attributes. */
15528 if (attr
== NULL
&& cu
->language
!= language_ada
)
15529 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
15531 name
= dwarf2_name (die
, cu
);
15533 TYPE_NAME (range_type
) = name
;
15535 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15537 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
15539 set_die_type (die
, range_type
, cu
);
15541 /* set_die_type should be already done. */
15542 set_descriptive_type (range_type
, die
, cu
);
15547 static struct type
*
15548 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15552 /* For now, we only support the C meaning of an unspecified type: void. */
15554 type
= init_type (cu
->objfile
, TYPE_CODE_VOID
, 0, NULL
);
15555 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
15557 return set_die_type (die
, type
, cu
);
15560 /* Read a single die and all its descendents. Set the die's sibling
15561 field to NULL; set other fields in the die correctly, and set all
15562 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
15563 location of the info_ptr after reading all of those dies. PARENT
15564 is the parent of the die in question. */
15566 static struct die_info
*
15567 read_die_and_children (const struct die_reader_specs
*reader
,
15568 const gdb_byte
*info_ptr
,
15569 const gdb_byte
**new_info_ptr
,
15570 struct die_info
*parent
)
15572 struct die_info
*die
;
15573 const gdb_byte
*cur_ptr
;
15576 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
15579 *new_info_ptr
= cur_ptr
;
15582 store_in_ref_table (die
, reader
->cu
);
15585 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
15589 *new_info_ptr
= cur_ptr
;
15592 die
->sibling
= NULL
;
15593 die
->parent
= parent
;
15597 /* Read a die, all of its descendents, and all of its siblings; set
15598 all of the fields of all of the dies correctly. Arguments are as
15599 in read_die_and_children. */
15601 static struct die_info
*
15602 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
15603 const gdb_byte
*info_ptr
,
15604 const gdb_byte
**new_info_ptr
,
15605 struct die_info
*parent
)
15607 struct die_info
*first_die
, *last_sibling
;
15608 const gdb_byte
*cur_ptr
;
15610 cur_ptr
= info_ptr
;
15611 first_die
= last_sibling
= NULL
;
15615 struct die_info
*die
15616 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
15620 *new_info_ptr
= cur_ptr
;
15627 last_sibling
->sibling
= die
;
15629 last_sibling
= die
;
15633 /* Read a die, all of its descendents, and all of its siblings; set
15634 all of the fields of all of the dies correctly. Arguments are as
15635 in read_die_and_children.
15636 This the main entry point for reading a DIE and all its children. */
15638 static struct die_info
*
15639 read_die_and_siblings (const struct die_reader_specs
*reader
,
15640 const gdb_byte
*info_ptr
,
15641 const gdb_byte
**new_info_ptr
,
15642 struct die_info
*parent
)
15644 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
15645 new_info_ptr
, parent
);
15647 if (dwarf_die_debug
)
15649 fprintf_unfiltered (gdb_stdlog
,
15650 "Read die from %s@0x%x of %s:\n",
15651 get_section_name (reader
->die_section
),
15652 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
15653 bfd_get_filename (reader
->abfd
));
15654 dump_die (die
, dwarf_die_debug
);
15660 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
15662 The caller is responsible for filling in the extra attributes
15663 and updating (*DIEP)->num_attrs.
15664 Set DIEP to point to a newly allocated die with its information,
15665 except for its child, sibling, and parent fields.
15666 Set HAS_CHILDREN to tell whether the die has children or not. */
15668 static const gdb_byte
*
15669 read_full_die_1 (const struct die_reader_specs
*reader
,
15670 struct die_info
**diep
, const gdb_byte
*info_ptr
,
15671 int *has_children
, int num_extra_attrs
)
15673 unsigned int abbrev_number
, bytes_read
, i
;
15674 struct abbrev_info
*abbrev
;
15675 struct die_info
*die
;
15676 struct dwarf2_cu
*cu
= reader
->cu
;
15677 bfd
*abfd
= reader
->abfd
;
15679 sect_offset sect_off
= (sect_offset
) (info_ptr
- reader
->buffer
);
15680 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
15681 info_ptr
+= bytes_read
;
15682 if (!abbrev_number
)
15689 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
15691 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
15693 bfd_get_filename (abfd
));
15695 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
15696 die
->sect_off
= sect_off
;
15697 die
->tag
= abbrev
->tag
;
15698 die
->abbrev
= abbrev_number
;
15700 /* Make the result usable.
15701 The caller needs to update num_attrs after adding the extra
15703 die
->num_attrs
= abbrev
->num_attrs
;
15705 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
15706 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
15710 *has_children
= abbrev
->has_children
;
15714 /* Read a die and all its attributes.
15715 Set DIEP to point to a newly allocated die with its information,
15716 except for its child, sibling, and parent fields.
15717 Set HAS_CHILDREN to tell whether the die has children or not. */
15719 static const gdb_byte
*
15720 read_full_die (const struct die_reader_specs
*reader
,
15721 struct die_info
**diep
, const gdb_byte
*info_ptr
,
15724 const gdb_byte
*result
;
15726 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
15728 if (dwarf_die_debug
)
15730 fprintf_unfiltered (gdb_stdlog
,
15731 "Read die from %s@0x%x of %s:\n",
15732 get_section_name (reader
->die_section
),
15733 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
15734 bfd_get_filename (reader
->abfd
));
15735 dump_die (*diep
, dwarf_die_debug
);
15741 /* Abbreviation tables.
15743 In DWARF version 2, the description of the debugging information is
15744 stored in a separate .debug_abbrev section. Before we read any
15745 dies from a section we read in all abbreviations and install them
15746 in a hash table. */
15748 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
15750 static struct abbrev_info
*
15751 abbrev_table_alloc_abbrev (struct abbrev_table
*abbrev_table
)
15753 struct abbrev_info
*abbrev
;
15755 abbrev
= XOBNEW (&abbrev_table
->abbrev_obstack
, struct abbrev_info
);
15756 memset (abbrev
, 0, sizeof (struct abbrev_info
));
15761 /* Add an abbreviation to the table. */
15764 abbrev_table_add_abbrev (struct abbrev_table
*abbrev_table
,
15765 unsigned int abbrev_number
,
15766 struct abbrev_info
*abbrev
)
15768 unsigned int hash_number
;
15770 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15771 abbrev
->next
= abbrev_table
->abbrevs
[hash_number
];
15772 abbrev_table
->abbrevs
[hash_number
] = abbrev
;
15775 /* Look up an abbrev in the table.
15776 Returns NULL if the abbrev is not found. */
15778 static struct abbrev_info
*
15779 abbrev_table_lookup_abbrev (const struct abbrev_table
*abbrev_table
,
15780 unsigned int abbrev_number
)
15782 unsigned int hash_number
;
15783 struct abbrev_info
*abbrev
;
15785 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15786 abbrev
= abbrev_table
->abbrevs
[hash_number
];
15790 if (abbrev
->number
== abbrev_number
)
15792 abbrev
= abbrev
->next
;
15797 /* Read in an abbrev table. */
15799 static struct abbrev_table
*
15800 abbrev_table_read_table (struct dwarf2_section_info
*section
,
15801 sect_offset sect_off
)
15803 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
15804 bfd
*abfd
= get_section_bfd_owner (section
);
15805 struct abbrev_table
*abbrev_table
;
15806 const gdb_byte
*abbrev_ptr
;
15807 struct abbrev_info
*cur_abbrev
;
15808 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
15809 unsigned int abbrev_form
;
15810 struct attr_abbrev
*cur_attrs
;
15811 unsigned int allocated_attrs
;
15813 abbrev_table
= XNEW (struct abbrev_table
);
15814 abbrev_table
->sect_off
= sect_off
;
15815 obstack_init (&abbrev_table
->abbrev_obstack
);
15816 abbrev_table
->abbrevs
=
15817 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct abbrev_info
*,
15819 memset (abbrev_table
->abbrevs
, 0,
15820 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
15822 dwarf2_read_section (objfile
, section
);
15823 abbrev_ptr
= section
->buffer
+ to_underlying (sect_off
);
15824 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15825 abbrev_ptr
+= bytes_read
;
15827 allocated_attrs
= ATTR_ALLOC_CHUNK
;
15828 cur_attrs
= XNEWVEC (struct attr_abbrev
, allocated_attrs
);
15830 /* Loop until we reach an abbrev number of 0. */
15831 while (abbrev_number
)
15833 cur_abbrev
= abbrev_table_alloc_abbrev (abbrev_table
);
15835 /* read in abbrev header */
15836 cur_abbrev
->number
= abbrev_number
;
15838 = (enum dwarf_tag
) read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15839 abbrev_ptr
+= bytes_read
;
15840 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
15843 /* now read in declarations */
15846 LONGEST implicit_const
;
15848 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15849 abbrev_ptr
+= bytes_read
;
15850 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15851 abbrev_ptr
+= bytes_read
;
15852 if (abbrev_form
== DW_FORM_implicit_const
)
15854 implicit_const
= read_signed_leb128 (abfd
, abbrev_ptr
,
15856 abbrev_ptr
+= bytes_read
;
15860 /* Initialize it due to a false compiler warning. */
15861 implicit_const
= -1;
15864 if (abbrev_name
== 0)
15867 if (cur_abbrev
->num_attrs
== allocated_attrs
)
15869 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
15871 = XRESIZEVEC (struct attr_abbrev
, cur_attrs
, allocated_attrs
);
15874 cur_attrs
[cur_abbrev
->num_attrs
].name
15875 = (enum dwarf_attribute
) abbrev_name
;
15876 cur_attrs
[cur_abbrev
->num_attrs
].form
15877 = (enum dwarf_form
) abbrev_form
;
15878 cur_attrs
[cur_abbrev
->num_attrs
].implicit_const
= implicit_const
;
15879 ++cur_abbrev
->num_attrs
;
15882 cur_abbrev
->attrs
=
15883 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct attr_abbrev
,
15884 cur_abbrev
->num_attrs
);
15885 memcpy (cur_abbrev
->attrs
, cur_attrs
,
15886 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
15888 abbrev_table_add_abbrev (abbrev_table
, abbrev_number
, cur_abbrev
);
15890 /* Get next abbreviation.
15891 Under Irix6 the abbreviations for a compilation unit are not
15892 always properly terminated with an abbrev number of 0.
15893 Exit loop if we encounter an abbreviation which we have
15894 already read (which means we are about to read the abbreviations
15895 for the next compile unit) or if the end of the abbreviation
15896 table is reached. */
15897 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
15899 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15900 abbrev_ptr
+= bytes_read
;
15901 if (abbrev_table_lookup_abbrev (abbrev_table
, abbrev_number
) != NULL
)
15906 return abbrev_table
;
15909 /* Free the resources held by ABBREV_TABLE. */
15912 abbrev_table_free (struct abbrev_table
*abbrev_table
)
15914 obstack_free (&abbrev_table
->abbrev_obstack
, NULL
);
15915 xfree (abbrev_table
);
15918 /* Same as abbrev_table_free but as a cleanup.
15919 We pass in a pointer to the pointer to the table so that we can
15920 set the pointer to NULL when we're done. It also simplifies
15921 build_type_psymtabs_1. */
15924 abbrev_table_free_cleanup (void *table_ptr
)
15926 struct abbrev_table
**abbrev_table_ptr
= (struct abbrev_table
**) table_ptr
;
15928 if (*abbrev_table_ptr
!= NULL
)
15929 abbrev_table_free (*abbrev_table_ptr
);
15930 *abbrev_table_ptr
= NULL
;
15933 /* Read the abbrev table for CU from ABBREV_SECTION. */
15936 dwarf2_read_abbrevs (struct dwarf2_cu
*cu
,
15937 struct dwarf2_section_info
*abbrev_section
)
15940 abbrev_table_read_table (abbrev_section
, cu
->header
.abbrev_sect_off
);
15943 /* Release the memory used by the abbrev table for a compilation unit. */
15946 dwarf2_free_abbrev_table (void *ptr_to_cu
)
15948 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr_to_cu
;
15950 if (cu
->abbrev_table
!= NULL
)
15951 abbrev_table_free (cu
->abbrev_table
);
15952 /* Set this to NULL so that we SEGV if we try to read it later,
15953 and also because free_comp_unit verifies this is NULL. */
15954 cu
->abbrev_table
= NULL
;
15957 /* Returns nonzero if TAG represents a type that we might generate a partial
15961 is_type_tag_for_partial (int tag
)
15966 /* Some types that would be reasonable to generate partial symbols for,
15967 that we don't at present. */
15968 case DW_TAG_array_type
:
15969 case DW_TAG_file_type
:
15970 case DW_TAG_ptr_to_member_type
:
15971 case DW_TAG_set_type
:
15972 case DW_TAG_string_type
:
15973 case DW_TAG_subroutine_type
:
15975 case DW_TAG_base_type
:
15976 case DW_TAG_class_type
:
15977 case DW_TAG_interface_type
:
15978 case DW_TAG_enumeration_type
:
15979 case DW_TAG_structure_type
:
15980 case DW_TAG_subrange_type
:
15981 case DW_TAG_typedef
:
15982 case DW_TAG_union_type
:
15989 /* Load all DIEs that are interesting for partial symbols into memory. */
15991 static struct partial_die_info
*
15992 load_partial_dies (const struct die_reader_specs
*reader
,
15993 const gdb_byte
*info_ptr
, int building_psymtab
)
15995 struct dwarf2_cu
*cu
= reader
->cu
;
15996 struct objfile
*objfile
= cu
->objfile
;
15997 struct partial_die_info
*part_die
;
15998 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
15999 struct abbrev_info
*abbrev
;
16000 unsigned int bytes_read
;
16001 unsigned int load_all
= 0;
16002 int nesting_level
= 1;
16007 gdb_assert (cu
->per_cu
!= NULL
);
16008 if (cu
->per_cu
->load_all_dies
)
16012 = htab_create_alloc_ex (cu
->header
.length
/ 12,
16016 &cu
->comp_unit_obstack
,
16017 hashtab_obstack_allocate
,
16018 dummy_obstack_deallocate
);
16020 part_die
= XOBNEW (&cu
->comp_unit_obstack
, struct partial_die_info
);
16024 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
16026 /* A NULL abbrev means the end of a series of children. */
16027 if (abbrev
== NULL
)
16029 if (--nesting_level
== 0)
16031 /* PART_DIE was probably the last thing allocated on the
16032 comp_unit_obstack, so we could call obstack_free
16033 here. We don't do that because the waste is small,
16034 and will be cleaned up when we're done with this
16035 compilation unit. This way, we're also more robust
16036 against other users of the comp_unit_obstack. */
16039 info_ptr
+= bytes_read
;
16040 last_die
= parent_die
;
16041 parent_die
= parent_die
->die_parent
;
16045 /* Check for template arguments. We never save these; if
16046 they're seen, we just mark the parent, and go on our way. */
16047 if (parent_die
!= NULL
16048 && cu
->language
== language_cplus
16049 && (abbrev
->tag
== DW_TAG_template_type_param
16050 || abbrev
->tag
== DW_TAG_template_value_param
))
16052 parent_die
->has_template_arguments
= 1;
16056 /* We don't need a partial DIE for the template argument. */
16057 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
16062 /* We only recurse into c++ subprograms looking for template arguments.
16063 Skip their other children. */
16065 && cu
->language
== language_cplus
16066 && parent_die
!= NULL
16067 && parent_die
->tag
== DW_TAG_subprogram
)
16069 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
16073 /* Check whether this DIE is interesting enough to save. Normally
16074 we would not be interested in members here, but there may be
16075 later variables referencing them via DW_AT_specification (for
16076 static members). */
16078 && !is_type_tag_for_partial (abbrev
->tag
)
16079 && abbrev
->tag
!= DW_TAG_constant
16080 && abbrev
->tag
!= DW_TAG_enumerator
16081 && abbrev
->tag
!= DW_TAG_subprogram
16082 && abbrev
->tag
!= DW_TAG_lexical_block
16083 && abbrev
->tag
!= DW_TAG_variable
16084 && abbrev
->tag
!= DW_TAG_namespace
16085 && abbrev
->tag
!= DW_TAG_module
16086 && abbrev
->tag
!= DW_TAG_member
16087 && abbrev
->tag
!= DW_TAG_imported_unit
16088 && abbrev
->tag
!= DW_TAG_imported_declaration
)
16090 /* Otherwise we skip to the next sibling, if any. */
16091 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
16095 info_ptr
= read_partial_die (reader
, part_die
, abbrev
, bytes_read
,
16098 /* This two-pass algorithm for processing partial symbols has a
16099 high cost in cache pressure. Thus, handle some simple cases
16100 here which cover the majority of C partial symbols. DIEs
16101 which neither have specification tags in them, nor could have
16102 specification tags elsewhere pointing at them, can simply be
16103 processed and discarded.
16105 This segment is also optional; scan_partial_symbols and
16106 add_partial_symbol will handle these DIEs if we chain
16107 them in normally. When compilers which do not emit large
16108 quantities of duplicate debug information are more common,
16109 this code can probably be removed. */
16111 /* Any complete simple types at the top level (pretty much all
16112 of them, for a language without namespaces), can be processed
16114 if (parent_die
== NULL
16115 && part_die
->has_specification
== 0
16116 && part_die
->is_declaration
== 0
16117 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
16118 || part_die
->tag
== DW_TAG_base_type
16119 || part_die
->tag
== DW_TAG_subrange_type
))
16121 if (building_psymtab
&& part_die
->name
!= NULL
)
16122 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
16123 VAR_DOMAIN
, LOC_TYPEDEF
,
16124 &objfile
->static_psymbols
,
16125 0, cu
->language
, objfile
);
16126 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
16130 /* The exception for DW_TAG_typedef with has_children above is
16131 a workaround of GCC PR debug/47510. In the case of this complaint
16132 type_name_no_tag_or_error will error on such types later.
16134 GDB skipped children of DW_TAG_typedef by the shortcut above and then
16135 it could not find the child DIEs referenced later, this is checked
16136 above. In correct DWARF DW_TAG_typedef should have no children. */
16138 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
16139 complaint (&symfile_complaints
,
16140 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
16141 "- DIE at 0x%x [in module %s]"),
16142 to_underlying (part_die
->sect_off
), objfile_name (objfile
));
16144 /* If we're at the second level, and we're an enumerator, and
16145 our parent has no specification (meaning possibly lives in a
16146 namespace elsewhere), then we can add the partial symbol now
16147 instead of queueing it. */
16148 if (part_die
->tag
== DW_TAG_enumerator
16149 && parent_die
!= NULL
16150 && parent_die
->die_parent
== NULL
16151 && parent_die
->tag
== DW_TAG_enumeration_type
16152 && parent_die
->has_specification
== 0)
16154 if (part_die
->name
== NULL
)
16155 complaint (&symfile_complaints
,
16156 _("malformed enumerator DIE ignored"));
16157 else if (building_psymtab
)
16158 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
16159 VAR_DOMAIN
, LOC_CONST
,
16160 cu
->language
== language_cplus
16161 ? &objfile
->global_psymbols
16162 : &objfile
->static_psymbols
,
16163 0, cu
->language
, objfile
);
16165 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
16169 /* We'll save this DIE so link it in. */
16170 part_die
->die_parent
= parent_die
;
16171 part_die
->die_sibling
= NULL
;
16172 part_die
->die_child
= NULL
;
16174 if (last_die
&& last_die
== parent_die
)
16175 last_die
->die_child
= part_die
;
16177 last_die
->die_sibling
= part_die
;
16179 last_die
= part_die
;
16181 if (first_die
== NULL
)
16182 first_die
= part_die
;
16184 /* Maybe add the DIE to the hash table. Not all DIEs that we
16185 find interesting need to be in the hash table, because we
16186 also have the parent/sibling/child chains; only those that we
16187 might refer to by offset later during partial symbol reading.
16189 For now this means things that might have be the target of a
16190 DW_AT_specification, DW_AT_abstract_origin, or
16191 DW_AT_extension. DW_AT_extension will refer only to
16192 namespaces; DW_AT_abstract_origin refers to functions (and
16193 many things under the function DIE, but we do not recurse
16194 into function DIEs during partial symbol reading) and
16195 possibly variables as well; DW_AT_specification refers to
16196 declarations. Declarations ought to have the DW_AT_declaration
16197 flag. It happens that GCC forgets to put it in sometimes, but
16198 only for functions, not for types.
16200 Adding more things than necessary to the hash table is harmless
16201 except for the performance cost. Adding too few will result in
16202 wasted time in find_partial_die, when we reread the compilation
16203 unit with load_all_dies set. */
16206 || abbrev
->tag
== DW_TAG_constant
16207 || abbrev
->tag
== DW_TAG_subprogram
16208 || abbrev
->tag
== DW_TAG_variable
16209 || abbrev
->tag
== DW_TAG_namespace
16210 || part_die
->is_declaration
)
16214 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
16215 to_underlying (part_die
->sect_off
),
16220 part_die
= XOBNEW (&cu
->comp_unit_obstack
, struct partial_die_info
);
16222 /* For some DIEs we want to follow their children (if any). For C
16223 we have no reason to follow the children of structures; for other
16224 languages we have to, so that we can get at method physnames
16225 to infer fully qualified class names, for DW_AT_specification,
16226 and for C++ template arguments. For C++, we also look one level
16227 inside functions to find template arguments (if the name of the
16228 function does not already contain the template arguments).
16230 For Ada, we need to scan the children of subprograms and lexical
16231 blocks as well because Ada allows the definition of nested
16232 entities that could be interesting for the debugger, such as
16233 nested subprograms for instance. */
16234 if (last_die
->has_children
16236 || last_die
->tag
== DW_TAG_namespace
16237 || last_die
->tag
== DW_TAG_module
16238 || last_die
->tag
== DW_TAG_enumeration_type
16239 || (cu
->language
== language_cplus
16240 && last_die
->tag
== DW_TAG_subprogram
16241 && (last_die
->name
== NULL
16242 || strchr (last_die
->name
, '<') == NULL
))
16243 || (cu
->language
!= language_c
16244 && (last_die
->tag
== DW_TAG_class_type
16245 || last_die
->tag
== DW_TAG_interface_type
16246 || last_die
->tag
== DW_TAG_structure_type
16247 || last_die
->tag
== DW_TAG_union_type
))
16248 || (cu
->language
== language_ada
16249 && (last_die
->tag
== DW_TAG_subprogram
16250 || last_die
->tag
== DW_TAG_lexical_block
))))
16253 parent_die
= last_die
;
16257 /* Otherwise we skip to the next sibling, if any. */
16258 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
16260 /* Back to the top, do it again. */
16264 /* Read a minimal amount of information into the minimal die structure. */
16266 static const gdb_byte
*
16267 read_partial_die (const struct die_reader_specs
*reader
,
16268 struct partial_die_info
*part_die
,
16269 struct abbrev_info
*abbrev
, unsigned int abbrev_len
,
16270 const gdb_byte
*info_ptr
)
16272 struct dwarf2_cu
*cu
= reader
->cu
;
16273 struct objfile
*objfile
= cu
->objfile
;
16274 const gdb_byte
*buffer
= reader
->buffer
;
16276 struct attribute attr
;
16277 int has_low_pc_attr
= 0;
16278 int has_high_pc_attr
= 0;
16279 int high_pc_relative
= 0;
16281 memset (part_die
, 0, sizeof (struct partial_die_info
));
16283 part_die
->sect_off
= (sect_offset
) (info_ptr
- buffer
);
16285 info_ptr
+= abbrev_len
;
16287 if (abbrev
== NULL
)
16290 part_die
->tag
= abbrev
->tag
;
16291 part_die
->has_children
= abbrev
->has_children
;
16293 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
16295 info_ptr
= read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
16297 /* Store the data if it is of an attribute we want to keep in a
16298 partial symbol table. */
16302 switch (part_die
->tag
)
16304 case DW_TAG_compile_unit
:
16305 case DW_TAG_partial_unit
:
16306 case DW_TAG_type_unit
:
16307 /* Compilation units have a DW_AT_name that is a filename, not
16308 a source language identifier. */
16309 case DW_TAG_enumeration_type
:
16310 case DW_TAG_enumerator
:
16311 /* These tags always have simple identifiers already; no need
16312 to canonicalize them. */
16313 part_die
->name
= DW_STRING (&attr
);
16317 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
16318 &objfile
->per_bfd
->storage_obstack
);
16322 case DW_AT_linkage_name
:
16323 case DW_AT_MIPS_linkage_name
:
16324 /* Note that both forms of linkage name might appear. We
16325 assume they will be the same, and we only store the last
16327 if (cu
->language
== language_ada
)
16328 part_die
->name
= DW_STRING (&attr
);
16329 part_die
->linkage_name
= DW_STRING (&attr
);
16332 has_low_pc_attr
= 1;
16333 part_die
->lowpc
= attr_value_as_address (&attr
);
16335 case DW_AT_high_pc
:
16336 has_high_pc_attr
= 1;
16337 part_die
->highpc
= attr_value_as_address (&attr
);
16338 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
16339 high_pc_relative
= 1;
16341 case DW_AT_location
:
16342 /* Support the .debug_loc offsets. */
16343 if (attr_form_is_block (&attr
))
16345 part_die
->d
.locdesc
= DW_BLOCK (&attr
);
16347 else if (attr_form_is_section_offset (&attr
))
16349 dwarf2_complex_location_expr_complaint ();
16353 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
16354 "partial symbol information");
16357 case DW_AT_external
:
16358 part_die
->is_external
= DW_UNSND (&attr
);
16360 case DW_AT_declaration
:
16361 part_die
->is_declaration
= DW_UNSND (&attr
);
16364 part_die
->has_type
= 1;
16366 case DW_AT_abstract_origin
:
16367 case DW_AT_specification
:
16368 case DW_AT_extension
:
16369 part_die
->has_specification
= 1;
16370 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
16371 part_die
->spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
16372 || cu
->per_cu
->is_dwz
);
16374 case DW_AT_sibling
:
16375 /* Ignore absolute siblings, they might point outside of
16376 the current compile unit. */
16377 if (attr
.form
== DW_FORM_ref_addr
)
16378 complaint (&symfile_complaints
,
16379 _("ignoring absolute DW_AT_sibling"));
16382 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
16383 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
16385 if (sibling_ptr
< info_ptr
)
16386 complaint (&symfile_complaints
,
16387 _("DW_AT_sibling points backwards"));
16388 else if (sibling_ptr
> reader
->buffer_end
)
16389 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
16391 part_die
->sibling
= sibling_ptr
;
16394 case DW_AT_byte_size
:
16395 part_die
->has_byte_size
= 1;
16397 case DW_AT_const_value
:
16398 part_die
->has_const_value
= 1;
16400 case DW_AT_calling_convention
:
16401 /* DWARF doesn't provide a way to identify a program's source-level
16402 entry point. DW_AT_calling_convention attributes are only meant
16403 to describe functions' calling conventions.
16405 However, because it's a necessary piece of information in
16406 Fortran, and before DWARF 4 DW_CC_program was the only
16407 piece of debugging information whose definition refers to
16408 a 'main program' at all, several compilers marked Fortran
16409 main programs with DW_CC_program --- even when those
16410 functions use the standard calling conventions.
16412 Although DWARF now specifies a way to provide this
16413 information, we support this practice for backward
16415 if (DW_UNSND (&attr
) == DW_CC_program
16416 && cu
->language
== language_fortran
)
16417 part_die
->main_subprogram
= 1;
16420 if (DW_UNSND (&attr
) == DW_INL_inlined
16421 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
16422 part_die
->may_be_inlined
= 1;
16426 if (part_die
->tag
== DW_TAG_imported_unit
)
16428 part_die
->d
.sect_off
= dwarf2_get_ref_die_offset (&attr
);
16429 part_die
->is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
16430 || cu
->per_cu
->is_dwz
);
16434 case DW_AT_main_subprogram
:
16435 part_die
->main_subprogram
= DW_UNSND (&attr
);
16443 if (high_pc_relative
)
16444 part_die
->highpc
+= part_die
->lowpc
;
16446 if (has_low_pc_attr
&& has_high_pc_attr
)
16448 /* When using the GNU linker, .gnu.linkonce. sections are used to
16449 eliminate duplicate copies of functions and vtables and such.
16450 The linker will arbitrarily choose one and discard the others.
16451 The AT_*_pc values for such functions refer to local labels in
16452 these sections. If the section from that file was discarded, the
16453 labels are not in the output, so the relocs get a value of 0.
16454 If this is a discarded function, mark the pc bounds as invalid,
16455 so that GDB will ignore it. */
16456 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
16458 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
16460 complaint (&symfile_complaints
,
16461 _("DW_AT_low_pc %s is zero "
16462 "for DIE at 0x%x [in module %s]"),
16463 paddress (gdbarch
, part_die
->lowpc
),
16464 to_underlying (part_die
->sect_off
), objfile_name (objfile
));
16466 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
16467 else if (part_die
->lowpc
>= part_die
->highpc
)
16469 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
16471 complaint (&symfile_complaints
,
16472 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
16473 "for DIE at 0x%x [in module %s]"),
16474 paddress (gdbarch
, part_die
->lowpc
),
16475 paddress (gdbarch
, part_die
->highpc
),
16476 to_underlying (part_die
->sect_off
),
16477 objfile_name (objfile
));
16480 part_die
->has_pc_info
= 1;
16486 /* Find a cached partial DIE at OFFSET in CU. */
16488 static struct partial_die_info
*
16489 find_partial_die_in_comp_unit (sect_offset sect_off
, struct dwarf2_cu
*cu
)
16491 struct partial_die_info
*lookup_die
= NULL
;
16492 struct partial_die_info part_die
;
16494 part_die
.sect_off
= sect_off
;
16495 lookup_die
= ((struct partial_die_info
*)
16496 htab_find_with_hash (cu
->partial_dies
, &part_die
,
16497 to_underlying (sect_off
)));
16502 /* Find a partial DIE at OFFSET, which may or may not be in CU,
16503 except in the case of .debug_types DIEs which do not reference
16504 outside their CU (they do however referencing other types via
16505 DW_FORM_ref_sig8). */
16507 static struct partial_die_info
*
16508 find_partial_die (sect_offset sect_off
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
16510 struct objfile
*objfile
= cu
->objfile
;
16511 struct dwarf2_per_cu_data
*per_cu
= NULL
;
16512 struct partial_die_info
*pd
= NULL
;
16514 if (offset_in_dwz
== cu
->per_cu
->is_dwz
16515 && offset_in_cu_p (&cu
->header
, sect_off
))
16517 pd
= find_partial_die_in_comp_unit (sect_off
, cu
);
16520 /* We missed recording what we needed.
16521 Load all dies and try again. */
16522 per_cu
= cu
->per_cu
;
16526 /* TUs don't reference other CUs/TUs (except via type signatures). */
16527 if (cu
->per_cu
->is_debug_types
)
16529 error (_("Dwarf Error: Type Unit at offset 0x%x contains"
16530 " external reference to offset 0x%x [in module %s].\n"),
16531 to_underlying (cu
->header
.sect_off
), to_underlying (sect_off
),
16532 bfd_get_filename (objfile
->obfd
));
16534 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
16537 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
16538 load_partial_comp_unit (per_cu
);
16540 per_cu
->cu
->last_used
= 0;
16541 pd
= find_partial_die_in_comp_unit (sect_off
, per_cu
->cu
);
16544 /* If we didn't find it, and not all dies have been loaded,
16545 load them all and try again. */
16547 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
16549 per_cu
->load_all_dies
= 1;
16551 /* This is nasty. When we reread the DIEs, somewhere up the call chain
16552 THIS_CU->cu may already be in use. So we can't just free it and
16553 replace its DIEs with the ones we read in. Instead, we leave those
16554 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
16555 and clobber THIS_CU->cu->partial_dies with the hash table for the new
16557 load_partial_comp_unit (per_cu
);
16559 pd
= find_partial_die_in_comp_unit (sect_off
, per_cu
->cu
);
16563 internal_error (__FILE__
, __LINE__
,
16564 _("could not find partial DIE 0x%x "
16565 "in cache [from module %s]\n"),
16566 to_underlying (sect_off
), bfd_get_filename (objfile
->obfd
));
16570 /* See if we can figure out if the class lives in a namespace. We do
16571 this by looking for a member function; its demangled name will
16572 contain namespace info, if there is any. */
16575 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
16576 struct dwarf2_cu
*cu
)
16578 /* NOTE: carlton/2003-10-07: Getting the info this way changes
16579 what template types look like, because the demangler
16580 frequently doesn't give the same name as the debug info. We
16581 could fix this by only using the demangled name to get the
16582 prefix (but see comment in read_structure_type). */
16584 struct partial_die_info
*real_pdi
;
16585 struct partial_die_info
*child_pdi
;
16587 /* If this DIE (this DIE's specification, if any) has a parent, then
16588 we should not do this. We'll prepend the parent's fully qualified
16589 name when we create the partial symbol. */
16591 real_pdi
= struct_pdi
;
16592 while (real_pdi
->has_specification
)
16593 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
16594 real_pdi
->spec_is_dwz
, cu
);
16596 if (real_pdi
->die_parent
!= NULL
)
16599 for (child_pdi
= struct_pdi
->die_child
;
16601 child_pdi
= child_pdi
->die_sibling
)
16603 if (child_pdi
->tag
== DW_TAG_subprogram
16604 && child_pdi
->linkage_name
!= NULL
)
16606 char *actual_class_name
16607 = language_class_name_from_physname (cu
->language_defn
,
16608 child_pdi
->linkage_name
);
16609 if (actual_class_name
!= NULL
)
16613 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
16615 strlen (actual_class_name
)));
16616 xfree (actual_class_name
);
16623 /* Adjust PART_DIE before generating a symbol for it. This function
16624 may set the is_external flag or change the DIE's name. */
16627 fixup_partial_die (struct partial_die_info
*part_die
,
16628 struct dwarf2_cu
*cu
)
16630 /* Once we've fixed up a die, there's no point in doing so again.
16631 This also avoids a memory leak if we were to call
16632 guess_partial_die_structure_name multiple times. */
16633 if (part_die
->fixup_called
)
16636 /* If we found a reference attribute and the DIE has no name, try
16637 to find a name in the referred to DIE. */
16639 if (part_die
->name
== NULL
&& part_die
->has_specification
)
16641 struct partial_die_info
*spec_die
;
16643 spec_die
= find_partial_die (part_die
->spec_offset
,
16644 part_die
->spec_is_dwz
, cu
);
16646 fixup_partial_die (spec_die
, cu
);
16648 if (spec_die
->name
)
16650 part_die
->name
= spec_die
->name
;
16652 /* Copy DW_AT_external attribute if it is set. */
16653 if (spec_die
->is_external
)
16654 part_die
->is_external
= spec_die
->is_external
;
16658 /* Set default names for some unnamed DIEs. */
16660 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
16661 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
16663 /* If there is no parent die to provide a namespace, and there are
16664 children, see if we can determine the namespace from their linkage
16666 if (cu
->language
== language_cplus
16667 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
16668 && part_die
->die_parent
== NULL
16669 && part_die
->has_children
16670 && (part_die
->tag
== DW_TAG_class_type
16671 || part_die
->tag
== DW_TAG_structure_type
16672 || part_die
->tag
== DW_TAG_union_type
))
16673 guess_partial_die_structure_name (part_die
, cu
);
16675 /* GCC might emit a nameless struct or union that has a linkage
16676 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
16677 if (part_die
->name
== NULL
16678 && (part_die
->tag
== DW_TAG_class_type
16679 || part_die
->tag
== DW_TAG_interface_type
16680 || part_die
->tag
== DW_TAG_structure_type
16681 || part_die
->tag
== DW_TAG_union_type
)
16682 && part_die
->linkage_name
!= NULL
)
16686 demangled
= gdb_demangle (part_die
->linkage_name
, DMGL_TYPES
);
16691 /* Strip any leading namespaces/classes, keep only the base name.
16692 DW_AT_name for named DIEs does not contain the prefixes. */
16693 base
= strrchr (demangled
, ':');
16694 if (base
&& base
> demangled
&& base
[-1] == ':')
16701 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
16702 base
, strlen (base
)));
16707 part_die
->fixup_called
= 1;
16710 /* Read an attribute value described by an attribute form. */
16712 static const gdb_byte
*
16713 read_attribute_value (const struct die_reader_specs
*reader
,
16714 struct attribute
*attr
, unsigned form
,
16715 LONGEST implicit_const
, const gdb_byte
*info_ptr
)
16717 struct dwarf2_cu
*cu
= reader
->cu
;
16718 struct objfile
*objfile
= cu
->objfile
;
16719 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
16720 bfd
*abfd
= reader
->abfd
;
16721 struct comp_unit_head
*cu_header
= &cu
->header
;
16722 unsigned int bytes_read
;
16723 struct dwarf_block
*blk
;
16725 attr
->form
= (enum dwarf_form
) form
;
16728 case DW_FORM_ref_addr
:
16729 if (cu
->header
.version
== 2)
16730 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
16732 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
16733 &cu
->header
, &bytes_read
);
16734 info_ptr
+= bytes_read
;
16736 case DW_FORM_GNU_ref_alt
:
16737 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
16738 info_ptr
+= bytes_read
;
16741 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
16742 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
16743 info_ptr
+= bytes_read
;
16745 case DW_FORM_block2
:
16746 blk
= dwarf_alloc_block (cu
);
16747 blk
->size
= read_2_bytes (abfd
, info_ptr
);
16749 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16750 info_ptr
+= blk
->size
;
16751 DW_BLOCK (attr
) = blk
;
16753 case DW_FORM_block4
:
16754 blk
= dwarf_alloc_block (cu
);
16755 blk
->size
= read_4_bytes (abfd
, info_ptr
);
16757 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16758 info_ptr
+= blk
->size
;
16759 DW_BLOCK (attr
) = blk
;
16761 case DW_FORM_data2
:
16762 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
16765 case DW_FORM_data4
:
16766 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
16769 case DW_FORM_data8
:
16770 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
16773 case DW_FORM_data16
:
16774 blk
= dwarf_alloc_block (cu
);
16776 blk
->data
= read_n_bytes (abfd
, info_ptr
, 16);
16778 DW_BLOCK (attr
) = blk
;
16780 case DW_FORM_sec_offset
:
16781 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
16782 info_ptr
+= bytes_read
;
16784 case DW_FORM_string
:
16785 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
16786 DW_STRING_IS_CANONICAL (attr
) = 0;
16787 info_ptr
+= bytes_read
;
16790 if (!cu
->per_cu
->is_dwz
)
16792 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
16794 DW_STRING_IS_CANONICAL (attr
) = 0;
16795 info_ptr
+= bytes_read
;
16799 case DW_FORM_line_strp
:
16800 if (!cu
->per_cu
->is_dwz
)
16802 DW_STRING (attr
) = read_indirect_line_string (abfd
, info_ptr
,
16803 cu_header
, &bytes_read
);
16804 DW_STRING_IS_CANONICAL (attr
) = 0;
16805 info_ptr
+= bytes_read
;
16809 case DW_FORM_GNU_strp_alt
:
16811 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
16812 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
16815 DW_STRING (attr
) = read_indirect_string_from_dwz (dwz
, str_offset
);
16816 DW_STRING_IS_CANONICAL (attr
) = 0;
16817 info_ptr
+= bytes_read
;
16820 case DW_FORM_exprloc
:
16821 case DW_FORM_block
:
16822 blk
= dwarf_alloc_block (cu
);
16823 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16824 info_ptr
+= bytes_read
;
16825 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16826 info_ptr
+= blk
->size
;
16827 DW_BLOCK (attr
) = blk
;
16829 case DW_FORM_block1
:
16830 blk
= dwarf_alloc_block (cu
);
16831 blk
->size
= read_1_byte (abfd
, info_ptr
);
16833 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16834 info_ptr
+= blk
->size
;
16835 DW_BLOCK (attr
) = blk
;
16837 case DW_FORM_data1
:
16838 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16842 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16845 case DW_FORM_flag_present
:
16846 DW_UNSND (attr
) = 1;
16848 case DW_FORM_sdata
:
16849 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
16850 info_ptr
+= bytes_read
;
16852 case DW_FORM_udata
:
16853 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16854 info_ptr
+= bytes_read
;
16857 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
16858 + read_1_byte (abfd
, info_ptr
));
16862 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
16863 + read_2_bytes (abfd
, info_ptr
));
16867 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
16868 + read_4_bytes (abfd
, info_ptr
));
16872 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
16873 + read_8_bytes (abfd
, info_ptr
));
16876 case DW_FORM_ref_sig8
:
16877 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
16880 case DW_FORM_ref_udata
:
16881 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
16882 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
16883 info_ptr
+= bytes_read
;
16885 case DW_FORM_indirect
:
16886 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16887 info_ptr
+= bytes_read
;
16888 if (form
== DW_FORM_implicit_const
)
16890 implicit_const
= read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
16891 info_ptr
+= bytes_read
;
16893 info_ptr
= read_attribute_value (reader
, attr
, form
, implicit_const
,
16896 case DW_FORM_implicit_const
:
16897 DW_SND (attr
) = implicit_const
;
16899 case DW_FORM_GNU_addr_index
:
16900 if (reader
->dwo_file
== NULL
)
16902 /* For now flag a hard error.
16903 Later we can turn this into a complaint. */
16904 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16905 dwarf_form_name (form
),
16906 bfd_get_filename (abfd
));
16908 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
16909 info_ptr
+= bytes_read
;
16911 case DW_FORM_GNU_str_index
:
16912 if (reader
->dwo_file
== NULL
)
16914 /* For now flag a hard error.
16915 Later we can turn this into a complaint if warranted. */
16916 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16917 dwarf_form_name (form
),
16918 bfd_get_filename (abfd
));
16921 ULONGEST str_index
=
16922 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16924 DW_STRING (attr
) = read_str_index (reader
, str_index
);
16925 DW_STRING_IS_CANONICAL (attr
) = 0;
16926 info_ptr
+= bytes_read
;
16930 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
16931 dwarf_form_name (form
),
16932 bfd_get_filename (abfd
));
16936 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
16937 attr
->form
= DW_FORM_GNU_ref_alt
;
16939 /* We have seen instances where the compiler tried to emit a byte
16940 size attribute of -1 which ended up being encoded as an unsigned
16941 0xffffffff. Although 0xffffffff is technically a valid size value,
16942 an object of this size seems pretty unlikely so we can relatively
16943 safely treat these cases as if the size attribute was invalid and
16944 treat them as zero by default. */
16945 if (attr
->name
== DW_AT_byte_size
16946 && form
== DW_FORM_data4
16947 && DW_UNSND (attr
) >= 0xffffffff)
16950 (&symfile_complaints
,
16951 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
16952 hex_string (DW_UNSND (attr
)));
16953 DW_UNSND (attr
) = 0;
16959 /* Read an attribute described by an abbreviated attribute. */
16961 static const gdb_byte
*
16962 read_attribute (const struct die_reader_specs
*reader
,
16963 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
16964 const gdb_byte
*info_ptr
)
16966 attr
->name
= abbrev
->name
;
16967 return read_attribute_value (reader
, attr
, abbrev
->form
,
16968 abbrev
->implicit_const
, info_ptr
);
16971 /* Read dwarf information from a buffer. */
16973 static unsigned int
16974 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
16976 return bfd_get_8 (abfd
, buf
);
16980 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
16982 return bfd_get_signed_8 (abfd
, buf
);
16985 static unsigned int
16986 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16988 return bfd_get_16 (abfd
, buf
);
16992 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16994 return bfd_get_signed_16 (abfd
, buf
);
16997 static unsigned int
16998 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
17000 return bfd_get_32 (abfd
, buf
);
17004 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
17006 return bfd_get_signed_32 (abfd
, buf
);
17010 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
17012 return bfd_get_64 (abfd
, buf
);
17016 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
17017 unsigned int *bytes_read
)
17019 struct comp_unit_head
*cu_header
= &cu
->header
;
17020 CORE_ADDR retval
= 0;
17022 if (cu_header
->signed_addr_p
)
17024 switch (cu_header
->addr_size
)
17027 retval
= bfd_get_signed_16 (abfd
, buf
);
17030 retval
= bfd_get_signed_32 (abfd
, buf
);
17033 retval
= bfd_get_signed_64 (abfd
, buf
);
17036 internal_error (__FILE__
, __LINE__
,
17037 _("read_address: bad switch, signed [in module %s]"),
17038 bfd_get_filename (abfd
));
17043 switch (cu_header
->addr_size
)
17046 retval
= bfd_get_16 (abfd
, buf
);
17049 retval
= bfd_get_32 (abfd
, buf
);
17052 retval
= bfd_get_64 (abfd
, buf
);
17055 internal_error (__FILE__
, __LINE__
,
17056 _("read_address: bad switch, "
17057 "unsigned [in module %s]"),
17058 bfd_get_filename (abfd
));
17062 *bytes_read
= cu_header
->addr_size
;
17066 /* Read the initial length from a section. The (draft) DWARF 3
17067 specification allows the initial length to take up either 4 bytes
17068 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
17069 bytes describe the length and all offsets will be 8 bytes in length
17072 An older, non-standard 64-bit format is also handled by this
17073 function. The older format in question stores the initial length
17074 as an 8-byte quantity without an escape value. Lengths greater
17075 than 2^32 aren't very common which means that the initial 4 bytes
17076 is almost always zero. Since a length value of zero doesn't make
17077 sense for the 32-bit format, this initial zero can be considered to
17078 be an escape value which indicates the presence of the older 64-bit
17079 format. As written, the code can't detect (old format) lengths
17080 greater than 4GB. If it becomes necessary to handle lengths
17081 somewhat larger than 4GB, we could allow other small values (such
17082 as the non-sensical values of 1, 2, and 3) to also be used as
17083 escape values indicating the presence of the old format.
17085 The value returned via bytes_read should be used to increment the
17086 relevant pointer after calling read_initial_length().
17088 [ Note: read_initial_length() and read_offset() are based on the
17089 document entitled "DWARF Debugging Information Format", revision
17090 3, draft 8, dated November 19, 2001. This document was obtained
17093 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
17095 This document is only a draft and is subject to change. (So beware.)
17097 Details regarding the older, non-standard 64-bit format were
17098 determined empirically by examining 64-bit ELF files produced by
17099 the SGI toolchain on an IRIX 6.5 machine.
17101 - Kevin, July 16, 2002
17105 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
17107 LONGEST length
= bfd_get_32 (abfd
, buf
);
17109 if (length
== 0xffffffff)
17111 length
= bfd_get_64 (abfd
, buf
+ 4);
17114 else if (length
== 0)
17116 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
17117 length
= bfd_get_64 (abfd
, buf
);
17128 /* Cover function for read_initial_length.
17129 Returns the length of the object at BUF, and stores the size of the
17130 initial length in *BYTES_READ and stores the size that offsets will be in
17132 If the initial length size is not equivalent to that specified in
17133 CU_HEADER then issue a complaint.
17134 This is useful when reading non-comp-unit headers. */
17137 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
17138 const struct comp_unit_head
*cu_header
,
17139 unsigned int *bytes_read
,
17140 unsigned int *offset_size
)
17142 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
17144 gdb_assert (cu_header
->initial_length_size
== 4
17145 || cu_header
->initial_length_size
== 8
17146 || cu_header
->initial_length_size
== 12);
17148 if (cu_header
->initial_length_size
!= *bytes_read
)
17149 complaint (&symfile_complaints
,
17150 _("intermixed 32-bit and 64-bit DWARF sections"));
17152 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
17156 /* Read an offset from the data stream. The size of the offset is
17157 given by cu_header->offset_size. */
17160 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
17161 const struct comp_unit_head
*cu_header
,
17162 unsigned int *bytes_read
)
17164 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
17166 *bytes_read
= cu_header
->offset_size
;
17170 /* Read an offset from the data stream. */
17173 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
17175 LONGEST retval
= 0;
17177 switch (offset_size
)
17180 retval
= bfd_get_32 (abfd
, buf
);
17183 retval
= bfd_get_64 (abfd
, buf
);
17186 internal_error (__FILE__
, __LINE__
,
17187 _("read_offset_1: bad switch [in module %s]"),
17188 bfd_get_filename (abfd
));
17194 static const gdb_byte
*
17195 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
17197 /* If the size of a host char is 8 bits, we can return a pointer
17198 to the buffer, otherwise we have to copy the data to a buffer
17199 allocated on the temporary obstack. */
17200 gdb_assert (HOST_CHAR_BIT
== 8);
17204 static const char *
17205 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
17206 unsigned int *bytes_read_ptr
)
17208 /* If the size of a host char is 8 bits, we can return a pointer
17209 to the string, otherwise we have to copy the string to a buffer
17210 allocated on the temporary obstack. */
17211 gdb_assert (HOST_CHAR_BIT
== 8);
17214 *bytes_read_ptr
= 1;
17217 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
17218 return (const char *) buf
;
17221 /* Return pointer to string at section SECT offset STR_OFFSET with error
17222 reporting strings FORM_NAME and SECT_NAME. */
17224 static const char *
17225 read_indirect_string_at_offset_from (bfd
*abfd
, LONGEST str_offset
,
17226 struct dwarf2_section_info
*sect
,
17227 const char *form_name
,
17228 const char *sect_name
)
17230 dwarf2_read_section (dwarf2_per_objfile
->objfile
, sect
);
17231 if (sect
->buffer
== NULL
)
17232 error (_("%s used without %s section [in module %s]"),
17233 form_name
, sect_name
, bfd_get_filename (abfd
));
17234 if (str_offset
>= sect
->size
)
17235 error (_("%s pointing outside of %s section [in module %s]"),
17236 form_name
, sect_name
, bfd_get_filename (abfd
));
17237 gdb_assert (HOST_CHAR_BIT
== 8);
17238 if (sect
->buffer
[str_offset
] == '\0')
17240 return (const char *) (sect
->buffer
+ str_offset
);
17243 /* Return pointer to string at .debug_str offset STR_OFFSET. */
17245 static const char *
17246 read_indirect_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
17248 return read_indirect_string_at_offset_from (abfd
, str_offset
,
17249 &dwarf2_per_objfile
->str
,
17250 "DW_FORM_strp", ".debug_str");
17253 /* Return pointer to string at .debug_line_str offset STR_OFFSET. */
17255 static const char *
17256 read_indirect_line_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
17258 return read_indirect_string_at_offset_from (abfd
, str_offset
,
17259 &dwarf2_per_objfile
->line_str
,
17260 "DW_FORM_line_strp",
17261 ".debug_line_str");
17264 /* Read a string at offset STR_OFFSET in the .debug_str section from
17265 the .dwz file DWZ. Throw an error if the offset is too large. If
17266 the string consists of a single NUL byte, return NULL; otherwise
17267 return a pointer to the string. */
17269 static const char *
17270 read_indirect_string_from_dwz (struct dwz_file
*dwz
, LONGEST str_offset
)
17272 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwz
->str
);
17274 if (dwz
->str
.buffer
== NULL
)
17275 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
17276 "section [in module %s]"),
17277 bfd_get_filename (dwz
->dwz_bfd
));
17278 if (str_offset
>= dwz
->str
.size
)
17279 error (_("DW_FORM_GNU_strp_alt pointing outside of "
17280 ".debug_str section [in module %s]"),
17281 bfd_get_filename (dwz
->dwz_bfd
));
17282 gdb_assert (HOST_CHAR_BIT
== 8);
17283 if (dwz
->str
.buffer
[str_offset
] == '\0')
17285 return (const char *) (dwz
->str
.buffer
+ str_offset
);
17288 /* Return pointer to string at .debug_str offset as read from BUF.
17289 BUF is assumed to be in a compilation unit described by CU_HEADER.
17290 Return *BYTES_READ_PTR count of bytes read from BUF. */
17292 static const char *
17293 read_indirect_string (bfd
*abfd
, const gdb_byte
*buf
,
17294 const struct comp_unit_head
*cu_header
,
17295 unsigned int *bytes_read_ptr
)
17297 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
17299 return read_indirect_string_at_offset (abfd
, str_offset
);
17302 /* Return pointer to string at .debug_line_str offset as read from BUF.
17303 BUF is assumed to be in a compilation unit described by CU_HEADER.
17304 Return *BYTES_READ_PTR count of bytes read from BUF. */
17306 static const char *
17307 read_indirect_line_string (bfd
*abfd
, const gdb_byte
*buf
,
17308 const struct comp_unit_head
*cu_header
,
17309 unsigned int *bytes_read_ptr
)
17311 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
17313 return read_indirect_line_string_at_offset (abfd
, str_offset
);
17317 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
17318 unsigned int *bytes_read_ptr
)
17321 unsigned int num_read
;
17323 unsigned char byte
;
17330 byte
= bfd_get_8 (abfd
, buf
);
17333 result
|= ((ULONGEST
) (byte
& 127) << shift
);
17334 if ((byte
& 128) == 0)
17340 *bytes_read_ptr
= num_read
;
17345 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
17346 unsigned int *bytes_read_ptr
)
17349 int shift
, num_read
;
17350 unsigned char byte
;
17357 byte
= bfd_get_8 (abfd
, buf
);
17360 result
|= ((LONGEST
) (byte
& 127) << shift
);
17362 if ((byte
& 128) == 0)
17367 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
17368 result
|= -(((LONGEST
) 1) << shift
);
17369 *bytes_read_ptr
= num_read
;
17373 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
17374 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
17375 ADDR_SIZE is the size of addresses from the CU header. */
17378 read_addr_index_1 (unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
17380 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
17381 bfd
*abfd
= objfile
->obfd
;
17382 const gdb_byte
*info_ptr
;
17384 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
17385 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
17386 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
17387 objfile_name (objfile
));
17388 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
17389 error (_("DW_FORM_addr_index pointing outside of "
17390 ".debug_addr section [in module %s]"),
17391 objfile_name (objfile
));
17392 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
17393 + addr_base
+ addr_index
* addr_size
);
17394 if (addr_size
== 4)
17395 return bfd_get_32 (abfd
, info_ptr
);
17397 return bfd_get_64 (abfd
, info_ptr
);
17400 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
17403 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
17405 return read_addr_index_1 (addr_index
, cu
->addr_base
, cu
->header
.addr_size
);
17408 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
17411 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
17412 unsigned int *bytes_read
)
17414 bfd
*abfd
= cu
->objfile
->obfd
;
17415 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
17417 return read_addr_index (cu
, addr_index
);
17420 /* Data structure to pass results from dwarf2_read_addr_index_reader
17421 back to dwarf2_read_addr_index. */
17423 struct dwarf2_read_addr_index_data
17425 ULONGEST addr_base
;
17429 /* die_reader_func for dwarf2_read_addr_index. */
17432 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
17433 const gdb_byte
*info_ptr
,
17434 struct die_info
*comp_unit_die
,
17438 struct dwarf2_cu
*cu
= reader
->cu
;
17439 struct dwarf2_read_addr_index_data
*aidata
=
17440 (struct dwarf2_read_addr_index_data
*) data
;
17442 aidata
->addr_base
= cu
->addr_base
;
17443 aidata
->addr_size
= cu
->header
.addr_size
;
17446 /* Given an index in .debug_addr, fetch the value.
17447 NOTE: This can be called during dwarf expression evaluation,
17448 long after the debug information has been read, and thus per_cu->cu
17449 may no longer exist. */
17452 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
17453 unsigned int addr_index
)
17455 struct objfile
*objfile
= per_cu
->objfile
;
17456 struct dwarf2_cu
*cu
= per_cu
->cu
;
17457 ULONGEST addr_base
;
17460 /* This is intended to be called from outside this file. */
17461 dw2_setup (objfile
);
17463 /* We need addr_base and addr_size.
17464 If we don't have PER_CU->cu, we have to get it.
17465 Nasty, but the alternative is storing the needed info in PER_CU,
17466 which at this point doesn't seem justified: it's not clear how frequently
17467 it would get used and it would increase the size of every PER_CU.
17468 Entry points like dwarf2_per_cu_addr_size do a similar thing
17469 so we're not in uncharted territory here.
17470 Alas we need to be a bit more complicated as addr_base is contained
17473 We don't need to read the entire CU(/TU).
17474 We just need the header and top level die.
17476 IWBN to use the aging mechanism to let us lazily later discard the CU.
17477 For now we skip this optimization. */
17481 addr_base
= cu
->addr_base
;
17482 addr_size
= cu
->header
.addr_size
;
17486 struct dwarf2_read_addr_index_data aidata
;
17488 /* Note: We can't use init_cutu_and_read_dies_simple here,
17489 we need addr_base. */
17490 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
17491 dwarf2_read_addr_index_reader
, &aidata
);
17492 addr_base
= aidata
.addr_base
;
17493 addr_size
= aidata
.addr_size
;
17496 return read_addr_index_1 (addr_index
, addr_base
, addr_size
);
17499 /* Given a DW_FORM_GNU_str_index, fetch the string.
17500 This is only used by the Fission support. */
17502 static const char *
17503 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
17505 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
17506 const char *objf_name
= objfile_name (objfile
);
17507 bfd
*abfd
= objfile
->obfd
;
17508 struct dwarf2_cu
*cu
= reader
->cu
;
17509 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
17510 struct dwarf2_section_info
*str_offsets_section
=
17511 &reader
->dwo_file
->sections
.str_offsets
;
17512 const gdb_byte
*info_ptr
;
17513 ULONGEST str_offset
;
17514 static const char form_name
[] = "DW_FORM_GNU_str_index";
17516 dwarf2_read_section (objfile
, str_section
);
17517 dwarf2_read_section (objfile
, str_offsets_section
);
17518 if (str_section
->buffer
== NULL
)
17519 error (_("%s used without .debug_str.dwo section"
17520 " in CU at offset 0x%x [in module %s]"),
17521 form_name
, to_underlying (cu
->header
.sect_off
), objf_name
);
17522 if (str_offsets_section
->buffer
== NULL
)
17523 error (_("%s used without .debug_str_offsets.dwo section"
17524 " in CU at offset 0x%x [in module %s]"),
17525 form_name
, to_underlying (cu
->header
.sect_off
), objf_name
);
17526 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
17527 error (_("%s pointing outside of .debug_str_offsets.dwo"
17528 " section in CU at offset 0x%x [in module %s]"),
17529 form_name
, to_underlying (cu
->header
.sect_off
), objf_name
);
17530 info_ptr
= (str_offsets_section
->buffer
17531 + str_index
* cu
->header
.offset_size
);
17532 if (cu
->header
.offset_size
== 4)
17533 str_offset
= bfd_get_32 (abfd
, info_ptr
);
17535 str_offset
= bfd_get_64 (abfd
, info_ptr
);
17536 if (str_offset
>= str_section
->size
)
17537 error (_("Offset from %s pointing outside of"
17538 " .debug_str.dwo section in CU at offset 0x%x [in module %s]"),
17539 form_name
, to_underlying (cu
->header
.sect_off
), objf_name
);
17540 return (const char *) (str_section
->buffer
+ str_offset
);
17543 /* Return the length of an LEB128 number in BUF. */
17546 leb128_size (const gdb_byte
*buf
)
17548 const gdb_byte
*begin
= buf
;
17554 if ((byte
& 128) == 0)
17555 return buf
- begin
;
17560 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
17569 cu
->language
= language_c
;
17572 case DW_LANG_C_plus_plus
:
17573 case DW_LANG_C_plus_plus_11
:
17574 case DW_LANG_C_plus_plus_14
:
17575 cu
->language
= language_cplus
;
17578 cu
->language
= language_d
;
17580 case DW_LANG_Fortran77
:
17581 case DW_LANG_Fortran90
:
17582 case DW_LANG_Fortran95
:
17583 case DW_LANG_Fortran03
:
17584 case DW_LANG_Fortran08
:
17585 cu
->language
= language_fortran
;
17588 cu
->language
= language_go
;
17590 case DW_LANG_Mips_Assembler
:
17591 cu
->language
= language_asm
;
17593 case DW_LANG_Ada83
:
17594 case DW_LANG_Ada95
:
17595 cu
->language
= language_ada
;
17597 case DW_LANG_Modula2
:
17598 cu
->language
= language_m2
;
17600 case DW_LANG_Pascal83
:
17601 cu
->language
= language_pascal
;
17604 cu
->language
= language_objc
;
17607 case DW_LANG_Rust_old
:
17608 cu
->language
= language_rust
;
17610 case DW_LANG_Cobol74
:
17611 case DW_LANG_Cobol85
:
17613 cu
->language
= language_minimal
;
17616 cu
->language_defn
= language_def (cu
->language
);
17619 /* Return the named attribute or NULL if not there. */
17621 static struct attribute
*
17622 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
17627 struct attribute
*spec
= NULL
;
17629 for (i
= 0; i
< die
->num_attrs
; ++i
)
17631 if (die
->attrs
[i
].name
== name
)
17632 return &die
->attrs
[i
];
17633 if (die
->attrs
[i
].name
== DW_AT_specification
17634 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
17635 spec
= &die
->attrs
[i
];
17641 die
= follow_die_ref (die
, spec
, &cu
);
17647 /* Return the named attribute or NULL if not there,
17648 but do not follow DW_AT_specification, etc.
17649 This is for use in contexts where we're reading .debug_types dies.
17650 Following DW_AT_specification, DW_AT_abstract_origin will take us
17651 back up the chain, and we want to go down. */
17653 static struct attribute
*
17654 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
17658 for (i
= 0; i
< die
->num_attrs
; ++i
)
17659 if (die
->attrs
[i
].name
== name
)
17660 return &die
->attrs
[i
];
17665 /* Return the string associated with a string-typed attribute, or NULL if it
17666 is either not found or is of an incorrect type. */
17668 static const char *
17669 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
17671 struct attribute
*attr
;
17672 const char *str
= NULL
;
17674 attr
= dwarf2_attr (die
, name
, cu
);
17678 if (attr
->form
== DW_FORM_strp
|| attr
->form
== DW_FORM_line_strp
17679 || attr
->form
== DW_FORM_string
17680 || attr
->form
== DW_FORM_GNU_str_index
17681 || attr
->form
== DW_FORM_GNU_strp_alt
)
17682 str
= DW_STRING (attr
);
17684 complaint (&symfile_complaints
,
17685 _("string type expected for attribute %s for "
17686 "DIE at 0x%x in module %s"),
17687 dwarf_attr_name (name
), to_underlying (die
->sect_off
),
17688 objfile_name (cu
->objfile
));
17694 /* Return non-zero iff the attribute NAME is defined for the given DIE,
17695 and holds a non-zero value. This function should only be used for
17696 DW_FORM_flag or DW_FORM_flag_present attributes. */
17699 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
17701 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
17703 return (attr
&& DW_UNSND (attr
));
17707 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
17709 /* A DIE is a declaration if it has a DW_AT_declaration attribute
17710 which value is non-zero. However, we have to be careful with
17711 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
17712 (via dwarf2_flag_true_p) follows this attribute. So we may
17713 end up accidently finding a declaration attribute that belongs
17714 to a different DIE referenced by the specification attribute,
17715 even though the given DIE does not have a declaration attribute. */
17716 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
17717 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
17720 /* Return the die giving the specification for DIE, if there is
17721 one. *SPEC_CU is the CU containing DIE on input, and the CU
17722 containing the return value on output. If there is no
17723 specification, but there is an abstract origin, that is
17726 static struct die_info
*
17727 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
17729 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
17732 if (spec_attr
== NULL
)
17733 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
17735 if (spec_attr
== NULL
)
17738 return follow_die_ref (die
, spec_attr
, spec_cu
);
17741 /* Stub for free_line_header to match void * callback types. */
17744 free_line_header_voidp (void *arg
)
17746 struct line_header
*lh
= (struct line_header
*) arg
;
17752 line_header::add_include_dir (const char *include_dir
)
17754 if (dwarf_line_debug
>= 2)
17755 fprintf_unfiltered (gdb_stdlog
, "Adding dir %zu: %s\n",
17756 include_dirs
.size () + 1, include_dir
);
17758 include_dirs
.push_back (include_dir
);
17762 line_header::add_file_name (const char *name
,
17764 unsigned int mod_time
,
17765 unsigned int length
)
17767 if (dwarf_line_debug
>= 2)
17768 fprintf_unfiltered (gdb_stdlog
, "Adding file %u: %s\n",
17769 (unsigned) file_names
.size () + 1, name
);
17771 file_names
.emplace_back (name
, d_index
, mod_time
, length
);
17774 /* A convenience function to find the proper .debug_line section for a CU. */
17776 static struct dwarf2_section_info
*
17777 get_debug_line_section (struct dwarf2_cu
*cu
)
17779 struct dwarf2_section_info
*section
;
17781 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
17783 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
17784 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
17785 else if (cu
->per_cu
->is_dwz
)
17787 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
17789 section
= &dwz
->line
;
17792 section
= &dwarf2_per_objfile
->line
;
17797 /* Read directory or file name entry format, starting with byte of
17798 format count entries, ULEB128 pairs of entry formats, ULEB128 of
17799 entries count and the entries themselves in the described entry
17803 read_formatted_entries (bfd
*abfd
, const gdb_byte
**bufp
,
17804 struct line_header
*lh
,
17805 const struct comp_unit_head
*cu_header
,
17806 void (*callback
) (struct line_header
*lh
,
17809 unsigned int mod_time
,
17810 unsigned int length
))
17812 gdb_byte format_count
, formati
;
17813 ULONGEST data_count
, datai
;
17814 const gdb_byte
*buf
= *bufp
;
17815 const gdb_byte
*format_header_data
;
17817 unsigned int bytes_read
;
17819 format_count
= read_1_byte (abfd
, buf
);
17821 format_header_data
= buf
;
17822 for (formati
= 0; formati
< format_count
; formati
++)
17824 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
17826 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
17830 data_count
= read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
17832 for (datai
= 0; datai
< data_count
; datai
++)
17834 const gdb_byte
*format
= format_header_data
;
17835 struct file_entry fe
;
17837 for (formati
= 0; formati
< format_count
; formati
++)
17839 ULONGEST content_type
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
17840 format
+= bytes_read
;
17842 ULONGEST form
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
17843 format
+= bytes_read
;
17845 gdb::optional
<const char *> string
;
17846 gdb::optional
<unsigned int> uint
;
17850 case DW_FORM_string
:
17851 string
.emplace (read_direct_string (abfd
, buf
, &bytes_read
));
17855 case DW_FORM_line_strp
:
17856 string
.emplace (read_indirect_line_string (abfd
, buf
,
17862 case DW_FORM_data1
:
17863 uint
.emplace (read_1_byte (abfd
, buf
));
17867 case DW_FORM_data2
:
17868 uint
.emplace (read_2_bytes (abfd
, buf
));
17872 case DW_FORM_data4
:
17873 uint
.emplace (read_4_bytes (abfd
, buf
));
17877 case DW_FORM_data8
:
17878 uint
.emplace (read_8_bytes (abfd
, buf
));
17882 case DW_FORM_udata
:
17883 uint
.emplace (read_unsigned_leb128 (abfd
, buf
, &bytes_read
));
17887 case DW_FORM_block
:
17888 /* It is valid only for DW_LNCT_timestamp which is ignored by
17893 switch (content_type
)
17896 if (string
.has_value ())
17899 case DW_LNCT_directory_index
:
17900 if (uint
.has_value ())
17901 fe
.d_index
= (dir_index
) *uint
;
17903 case DW_LNCT_timestamp
:
17904 if (uint
.has_value ())
17905 fe
.mod_time
= *uint
;
17908 if (uint
.has_value ())
17914 complaint (&symfile_complaints
,
17915 _("Unknown format content type %s"),
17916 pulongest (content_type
));
17920 callback (lh
, fe
.name
, fe
.d_index
, fe
.mod_time
, fe
.length
);
17926 /* Read the statement program header starting at OFFSET in
17927 .debug_line, or .debug_line.dwo. Return a pointer
17928 to a struct line_header, allocated using xmalloc.
17929 Returns NULL if there is a problem reading the header, e.g., if it
17930 has a version we don't understand.
17932 NOTE: the strings in the include directory and file name tables of
17933 the returned object point into the dwarf line section buffer,
17934 and must not be freed. */
17936 static line_header_up
17937 dwarf_decode_line_header (sect_offset sect_off
, struct dwarf2_cu
*cu
)
17939 const gdb_byte
*line_ptr
;
17940 unsigned int bytes_read
, offset_size
;
17942 const char *cur_dir
, *cur_file
;
17943 struct dwarf2_section_info
*section
;
17946 section
= get_debug_line_section (cu
);
17947 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
17948 if (section
->buffer
== NULL
)
17950 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
17951 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
17953 complaint (&symfile_complaints
, _("missing .debug_line section"));
17957 /* We can't do this until we know the section is non-empty.
17958 Only then do we know we have such a section. */
17959 abfd
= get_section_bfd_owner (section
);
17961 /* Make sure that at least there's room for the total_length field.
17962 That could be 12 bytes long, but we're just going to fudge that. */
17963 if (to_underlying (sect_off
) + 4 >= section
->size
)
17965 dwarf2_statement_list_fits_in_line_number_section_complaint ();
17969 line_header_up
lh (new line_header ());
17971 lh
->sect_off
= sect_off
;
17972 lh
->offset_in_dwz
= cu
->per_cu
->is_dwz
;
17974 line_ptr
= section
->buffer
+ to_underlying (sect_off
);
17976 /* Read in the header. */
17978 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
17979 &bytes_read
, &offset_size
);
17980 line_ptr
+= bytes_read
;
17981 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
17983 dwarf2_statement_list_fits_in_line_number_section_complaint ();
17986 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
17987 lh
->version
= read_2_bytes (abfd
, line_ptr
);
17989 if (lh
->version
> 5)
17991 /* This is a version we don't understand. The format could have
17992 changed in ways we don't handle properly so just punt. */
17993 complaint (&symfile_complaints
,
17994 _("unsupported version in .debug_line section"));
17997 if (lh
->version
>= 5)
17999 gdb_byte segment_selector_size
;
18001 /* Skip address size. */
18002 read_1_byte (abfd
, line_ptr
);
18005 segment_selector_size
= read_1_byte (abfd
, line_ptr
);
18007 if (segment_selector_size
!= 0)
18009 complaint (&symfile_complaints
,
18010 _("unsupported segment selector size %u "
18011 "in .debug_line section"),
18012 segment_selector_size
);
18016 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
18017 line_ptr
+= offset_size
;
18018 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
18020 if (lh
->version
>= 4)
18022 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
18026 lh
->maximum_ops_per_instruction
= 1;
18028 if (lh
->maximum_ops_per_instruction
== 0)
18030 lh
->maximum_ops_per_instruction
= 1;
18031 complaint (&symfile_complaints
,
18032 _("invalid maximum_ops_per_instruction "
18033 "in `.debug_line' section"));
18036 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
18038 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
18040 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
18042 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
18044 lh
->standard_opcode_lengths
.reset (new unsigned char[lh
->opcode_base
]);
18046 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
18047 for (i
= 1; i
< lh
->opcode_base
; ++i
)
18049 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
18053 if (lh
->version
>= 5)
18055 /* Read directory table. */
18056 read_formatted_entries (abfd
, &line_ptr
, lh
.get (), &cu
->header
,
18057 [] (struct line_header
*lh
, const char *name
,
18058 dir_index d_index
, unsigned int mod_time
,
18059 unsigned int length
)
18061 lh
->add_include_dir (name
);
18064 /* Read file name table. */
18065 read_formatted_entries (abfd
, &line_ptr
, lh
.get (), &cu
->header
,
18066 [] (struct line_header
*lh
, const char *name
,
18067 dir_index d_index
, unsigned int mod_time
,
18068 unsigned int length
)
18070 lh
->add_file_name (name
, d_index
, mod_time
, length
);
18075 /* Read directory table. */
18076 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
18078 line_ptr
+= bytes_read
;
18079 lh
->add_include_dir (cur_dir
);
18081 line_ptr
+= bytes_read
;
18083 /* Read file name table. */
18084 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
18086 unsigned int mod_time
, length
;
18089 line_ptr
+= bytes_read
;
18090 d_index
= (dir_index
) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18091 line_ptr
+= bytes_read
;
18092 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18093 line_ptr
+= bytes_read
;
18094 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18095 line_ptr
+= bytes_read
;
18097 lh
->add_file_name (cur_file
, d_index
, mod_time
, length
);
18099 line_ptr
+= bytes_read
;
18101 lh
->statement_program_start
= line_ptr
;
18103 if (line_ptr
> (section
->buffer
+ section
->size
))
18104 complaint (&symfile_complaints
,
18105 _("line number info header doesn't "
18106 "fit in `.debug_line' section"));
18111 /* Subroutine of dwarf_decode_lines to simplify it.
18112 Return the file name of the psymtab for included file FILE_INDEX
18113 in line header LH of PST.
18114 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
18115 If space for the result is malloc'd, it will be freed by a cleanup.
18116 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename.
18118 The function creates dangling cleanup registration. */
18120 static const char *
18121 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
18122 const struct partial_symtab
*pst
,
18123 const char *comp_dir
)
18125 const file_entry
&fe
= lh
->file_names
[file_index
];
18126 const char *include_name
= fe
.name
;
18127 const char *include_name_to_compare
= include_name
;
18128 const char *pst_filename
;
18129 char *copied_name
= NULL
;
18132 const char *dir_name
= fe
.include_dir (lh
);
18134 if (!IS_ABSOLUTE_PATH (include_name
)
18135 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
18137 /* Avoid creating a duplicate psymtab for PST.
18138 We do this by comparing INCLUDE_NAME and PST_FILENAME.
18139 Before we do the comparison, however, we need to account
18140 for DIR_NAME and COMP_DIR.
18141 First prepend dir_name (if non-NULL). If we still don't
18142 have an absolute path prepend comp_dir (if non-NULL).
18143 However, the directory we record in the include-file's
18144 psymtab does not contain COMP_DIR (to match the
18145 corresponding symtab(s)).
18150 bash$ gcc -g ./hello.c
18151 include_name = "hello.c"
18153 DW_AT_comp_dir = comp_dir = "/tmp"
18154 DW_AT_name = "./hello.c"
18158 if (dir_name
!= NULL
)
18160 char *tem
= concat (dir_name
, SLASH_STRING
,
18161 include_name
, (char *)NULL
);
18163 make_cleanup (xfree
, tem
);
18164 include_name
= tem
;
18165 include_name_to_compare
= include_name
;
18167 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
18169 char *tem
= concat (comp_dir
, SLASH_STRING
,
18170 include_name
, (char *)NULL
);
18172 make_cleanup (xfree
, tem
);
18173 include_name_to_compare
= tem
;
18177 pst_filename
= pst
->filename
;
18178 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
18180 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
18181 pst_filename
, (char *)NULL
);
18182 pst_filename
= copied_name
;
18185 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
18187 if (copied_name
!= NULL
)
18188 xfree (copied_name
);
18192 return include_name
;
18195 /* State machine to track the state of the line number program. */
18197 class lnp_state_machine
18200 /* Initialize a machine state for the start of a line number
18202 lnp_state_machine (gdbarch
*arch
, line_header
*lh
, bool record_lines_p
);
18204 file_entry
*current_file ()
18206 /* lh->file_names is 0-based, but the file name numbers in the
18207 statement program are 1-based. */
18208 return m_line_header
->file_name_at (m_file
);
18211 /* Record the line in the state machine. END_SEQUENCE is true if
18212 we're processing the end of a sequence. */
18213 void record_line (bool end_sequence
);
18215 /* Check address and if invalid nop-out the rest of the lines in this
18217 void check_line_address (struct dwarf2_cu
*cu
,
18218 const gdb_byte
*line_ptr
,
18219 CORE_ADDR lowpc
, CORE_ADDR address
);
18221 void handle_set_discriminator (unsigned int discriminator
)
18223 m_discriminator
= discriminator
;
18224 m_line_has_non_zero_discriminator
|= discriminator
!= 0;
18227 /* Handle DW_LNE_set_address. */
18228 void handle_set_address (CORE_ADDR baseaddr
, CORE_ADDR address
)
18231 address
+= baseaddr
;
18232 m_address
= gdbarch_adjust_dwarf2_line (m_gdbarch
, address
, false);
18235 /* Handle DW_LNS_advance_pc. */
18236 void handle_advance_pc (CORE_ADDR adjust
);
18238 /* Handle a special opcode. */
18239 void handle_special_opcode (unsigned char op_code
);
18241 /* Handle DW_LNS_advance_line. */
18242 void handle_advance_line (int line_delta
)
18244 advance_line (line_delta
);
18247 /* Handle DW_LNS_set_file. */
18248 void handle_set_file (file_name_index file
);
18250 /* Handle DW_LNS_negate_stmt. */
18251 void handle_negate_stmt ()
18253 m_is_stmt
= !m_is_stmt
;
18256 /* Handle DW_LNS_const_add_pc. */
18257 void handle_const_add_pc ();
18259 /* Handle DW_LNS_fixed_advance_pc. */
18260 void handle_fixed_advance_pc (CORE_ADDR addr_adj
)
18262 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
18266 /* Handle DW_LNS_copy. */
18267 void handle_copy ()
18269 record_line (false);
18270 m_discriminator
= 0;
18273 /* Handle DW_LNE_end_sequence. */
18274 void handle_end_sequence ()
18276 m_record_line_callback
= ::record_line
;
18280 /* Advance the line by LINE_DELTA. */
18281 void advance_line (int line_delta
)
18283 m_line
+= line_delta
;
18285 if (line_delta
!= 0)
18286 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
18289 gdbarch
*m_gdbarch
;
18291 /* True if we're recording lines.
18292 Otherwise we're building partial symtabs and are just interested in
18293 finding include files mentioned by the line number program. */
18294 bool m_record_lines_p
;
18296 /* The line number header. */
18297 line_header
*m_line_header
;
18299 /* These are part of the standard DWARF line number state machine,
18300 and initialized according to the DWARF spec. */
18302 unsigned char m_op_index
= 0;
18303 /* The line table index (1-based) of the current file. */
18304 file_name_index m_file
= (file_name_index
) 1;
18305 unsigned int m_line
= 1;
18307 /* These are initialized in the constructor. */
18309 CORE_ADDR m_address
;
18311 unsigned int m_discriminator
;
18313 /* Additional bits of state we need to track. */
18315 /* The last file that we called dwarf2_start_subfile for.
18316 This is only used for TLLs. */
18317 unsigned int m_last_file
= 0;
18318 /* The last file a line number was recorded for. */
18319 struct subfile
*m_last_subfile
= NULL
;
18321 /* The function to call to record a line. */
18322 record_line_ftype
*m_record_line_callback
= NULL
;
18324 /* The last line number that was recorded, used to coalesce
18325 consecutive entries for the same line. This can happen, for
18326 example, when discriminators are present. PR 17276. */
18327 unsigned int m_last_line
= 0;
18328 bool m_line_has_non_zero_discriminator
= false;
18332 lnp_state_machine::handle_advance_pc (CORE_ADDR adjust
)
18334 CORE_ADDR addr_adj
= (((m_op_index
+ adjust
)
18335 / m_line_header
->maximum_ops_per_instruction
)
18336 * m_line_header
->minimum_instruction_length
);
18337 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
18338 m_op_index
= ((m_op_index
+ adjust
)
18339 % m_line_header
->maximum_ops_per_instruction
);
18343 lnp_state_machine::handle_special_opcode (unsigned char op_code
)
18345 unsigned char adj_opcode
= op_code
- m_line_header
->opcode_base
;
18346 CORE_ADDR addr_adj
= (((m_op_index
18347 + (adj_opcode
/ m_line_header
->line_range
))
18348 / m_line_header
->maximum_ops_per_instruction
)
18349 * m_line_header
->minimum_instruction_length
);
18350 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
18351 m_op_index
= ((m_op_index
+ (adj_opcode
/ m_line_header
->line_range
))
18352 % m_line_header
->maximum_ops_per_instruction
);
18354 int line_delta
= (m_line_header
->line_base
18355 + (adj_opcode
% m_line_header
->line_range
));
18356 advance_line (line_delta
);
18357 record_line (false);
18358 m_discriminator
= 0;
18362 lnp_state_machine::handle_set_file (file_name_index file
)
18366 const file_entry
*fe
= current_file ();
18368 dwarf2_debug_line_missing_file_complaint ();
18369 else if (m_record_lines_p
)
18371 const char *dir
= fe
->include_dir (m_line_header
);
18373 m_last_subfile
= current_subfile
;
18374 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
18375 dwarf2_start_subfile (fe
->name
, dir
);
18380 lnp_state_machine::handle_const_add_pc ()
18383 = (255 - m_line_header
->opcode_base
) / m_line_header
->line_range
;
18386 = (((m_op_index
+ adjust
)
18387 / m_line_header
->maximum_ops_per_instruction
)
18388 * m_line_header
->minimum_instruction_length
);
18390 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
18391 m_op_index
= ((m_op_index
+ adjust
)
18392 % m_line_header
->maximum_ops_per_instruction
);
18395 /* Ignore this record_line request. */
18398 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
18403 /* Return non-zero if we should add LINE to the line number table.
18404 LINE is the line to add, LAST_LINE is the last line that was added,
18405 LAST_SUBFILE is the subfile for LAST_LINE.
18406 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
18407 had a non-zero discriminator.
18409 We have to be careful in the presence of discriminators.
18410 E.g., for this line:
18412 for (i = 0; i < 100000; i++);
18414 clang can emit four line number entries for that one line,
18415 each with a different discriminator.
18416 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
18418 However, we want gdb to coalesce all four entries into one.
18419 Otherwise the user could stepi into the middle of the line and
18420 gdb would get confused about whether the pc really was in the
18421 middle of the line.
18423 Things are further complicated by the fact that two consecutive
18424 line number entries for the same line is a heuristic used by gcc
18425 to denote the end of the prologue. So we can't just discard duplicate
18426 entries, we have to be selective about it. The heuristic we use is
18427 that we only collapse consecutive entries for the same line if at least
18428 one of those entries has a non-zero discriminator. PR 17276.
18430 Note: Addresses in the line number state machine can never go backwards
18431 within one sequence, thus this coalescing is ok. */
18434 dwarf_record_line_p (unsigned int line
, unsigned int last_line
,
18435 int line_has_non_zero_discriminator
,
18436 struct subfile
*last_subfile
)
18438 if (current_subfile
!= last_subfile
)
18440 if (line
!= last_line
)
18442 /* Same line for the same file that we've seen already.
18443 As a last check, for pr 17276, only record the line if the line
18444 has never had a non-zero discriminator. */
18445 if (!line_has_non_zero_discriminator
)
18450 /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS
18451 in the line table of subfile SUBFILE. */
18454 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
18455 unsigned int line
, CORE_ADDR address
,
18456 record_line_ftype p_record_line
)
18458 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
18460 if (dwarf_line_debug
)
18462 fprintf_unfiltered (gdb_stdlog
,
18463 "Recording line %u, file %s, address %s\n",
18464 line
, lbasename (subfile
->name
),
18465 paddress (gdbarch
, address
));
18468 (*p_record_line
) (subfile
, line
, addr
);
18471 /* Subroutine of dwarf_decode_lines_1 to simplify it.
18472 Mark the end of a set of line number records.
18473 The arguments are the same as for dwarf_record_line_1.
18474 If SUBFILE is NULL the request is ignored. */
18477 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
18478 CORE_ADDR address
, record_line_ftype p_record_line
)
18480 if (subfile
== NULL
)
18483 if (dwarf_line_debug
)
18485 fprintf_unfiltered (gdb_stdlog
,
18486 "Finishing current line, file %s, address %s\n",
18487 lbasename (subfile
->name
),
18488 paddress (gdbarch
, address
));
18491 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, p_record_line
);
18495 lnp_state_machine::record_line (bool end_sequence
)
18497 if (dwarf_line_debug
)
18499 fprintf_unfiltered (gdb_stdlog
,
18500 "Processing actual line %u: file %u,"
18501 " address %s, is_stmt %u, discrim %u\n",
18502 m_line
, to_underlying (m_file
),
18503 paddress (m_gdbarch
, m_address
),
18504 m_is_stmt
, m_discriminator
);
18507 file_entry
*fe
= current_file ();
18510 dwarf2_debug_line_missing_file_complaint ();
18511 /* For now we ignore lines not starting on an instruction boundary.
18512 But not when processing end_sequence for compatibility with the
18513 previous version of the code. */
18514 else if (m_op_index
== 0 || end_sequence
)
18516 fe
->included_p
= 1;
18517 if (m_record_lines_p
&& m_is_stmt
)
18519 if (m_last_subfile
!= current_subfile
|| end_sequence
)
18521 dwarf_finish_line (m_gdbarch
, m_last_subfile
,
18522 m_address
, m_record_line_callback
);
18527 if (dwarf_record_line_p (m_line
, m_last_line
,
18528 m_line_has_non_zero_discriminator
,
18531 dwarf_record_line_1 (m_gdbarch
, current_subfile
,
18533 m_record_line_callback
);
18535 m_last_subfile
= current_subfile
;
18536 m_last_line
= m_line
;
18542 lnp_state_machine::lnp_state_machine (gdbarch
*arch
, line_header
*lh
,
18543 bool record_lines_p
)
18546 m_record_lines_p
= record_lines_p
;
18547 m_line_header
= lh
;
18549 m_record_line_callback
= ::record_line
;
18551 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
18552 was a line entry for it so that the backend has a chance to adjust it
18553 and also record it in case it needs it. This is currently used by MIPS
18554 code, cf. `mips_adjust_dwarf2_line'. */
18555 m_address
= gdbarch_adjust_dwarf2_line (arch
, 0, 0);
18556 m_is_stmt
= lh
->default_is_stmt
;
18557 m_discriminator
= 0;
18561 lnp_state_machine::check_line_address (struct dwarf2_cu
*cu
,
18562 const gdb_byte
*line_ptr
,
18563 CORE_ADDR lowpc
, CORE_ADDR address
)
18565 /* If address < lowpc then it's not a usable value, it's outside the
18566 pc range of the CU. However, we restrict the test to only address
18567 values of zero to preserve GDB's previous behaviour which is to
18568 handle the specific case of a function being GC'd by the linker. */
18570 if (address
== 0 && address
< lowpc
)
18572 /* This line table is for a function which has been
18573 GCd by the linker. Ignore it. PR gdb/12528 */
18575 struct objfile
*objfile
= cu
->objfile
;
18576 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
18578 complaint (&symfile_complaints
,
18579 _(".debug_line address at offset 0x%lx is 0 [in module %s]"),
18580 line_offset
, objfile_name (objfile
));
18581 m_record_line_callback
= noop_record_line
;
18582 /* Note: record_line_callback is left as noop_record_line until
18583 we see DW_LNE_end_sequence. */
18587 /* Subroutine of dwarf_decode_lines to simplify it.
18588 Process the line number information in LH.
18589 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
18590 program in order to set included_p for every referenced header. */
18593 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
18594 const int decode_for_pst_p
, CORE_ADDR lowpc
)
18596 const gdb_byte
*line_ptr
, *extended_end
;
18597 const gdb_byte
*line_end
;
18598 unsigned int bytes_read
, extended_len
;
18599 unsigned char op_code
, extended_op
;
18600 CORE_ADDR baseaddr
;
18601 struct objfile
*objfile
= cu
->objfile
;
18602 bfd
*abfd
= objfile
->obfd
;
18603 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18604 /* True if we're recording line info (as opposed to building partial
18605 symtabs and just interested in finding include files mentioned by
18606 the line number program). */
18607 bool record_lines_p
= !decode_for_pst_p
;
18609 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
18611 line_ptr
= lh
->statement_program_start
;
18612 line_end
= lh
->statement_program_end
;
18614 /* Read the statement sequences until there's nothing left. */
18615 while (line_ptr
< line_end
)
18617 /* The DWARF line number program state machine. Reset the state
18618 machine at the start of each sequence. */
18619 lnp_state_machine
state_machine (gdbarch
, lh
, record_lines_p
);
18620 bool end_sequence
= false;
18622 if (record_lines_p
)
18624 /* Start a subfile for the current file of the state
18626 const file_entry
*fe
= state_machine
.current_file ();
18629 dwarf2_start_subfile (fe
->name
, fe
->include_dir (lh
));
18632 /* Decode the table. */
18633 while (line_ptr
< line_end
&& !end_sequence
)
18635 op_code
= read_1_byte (abfd
, line_ptr
);
18638 if (op_code
>= lh
->opcode_base
)
18640 /* Special opcode. */
18641 state_machine
.handle_special_opcode (op_code
);
18643 else switch (op_code
)
18645 case DW_LNS_extended_op
:
18646 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
18648 line_ptr
+= bytes_read
;
18649 extended_end
= line_ptr
+ extended_len
;
18650 extended_op
= read_1_byte (abfd
, line_ptr
);
18652 switch (extended_op
)
18654 case DW_LNE_end_sequence
:
18655 state_machine
.handle_end_sequence ();
18656 end_sequence
= true;
18658 case DW_LNE_set_address
:
18661 = read_address (abfd
, line_ptr
, cu
, &bytes_read
);
18662 line_ptr
+= bytes_read
;
18664 state_machine
.check_line_address (cu
, line_ptr
,
18666 state_machine
.handle_set_address (baseaddr
, address
);
18669 case DW_LNE_define_file
:
18671 const char *cur_file
;
18672 unsigned int mod_time
, length
;
18675 cur_file
= read_direct_string (abfd
, line_ptr
,
18677 line_ptr
+= bytes_read
;
18678 dindex
= (dir_index
)
18679 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18680 line_ptr
+= bytes_read
;
18682 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18683 line_ptr
+= bytes_read
;
18685 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18686 line_ptr
+= bytes_read
;
18687 lh
->add_file_name (cur_file
, dindex
, mod_time
, length
);
18690 case DW_LNE_set_discriminator
:
18692 /* The discriminator is not interesting to the
18693 debugger; just ignore it. We still need to
18694 check its value though:
18695 if there are consecutive entries for the same
18696 (non-prologue) line we want to coalesce them.
18699 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18700 line_ptr
+= bytes_read
;
18702 state_machine
.handle_set_discriminator (discr
);
18706 complaint (&symfile_complaints
,
18707 _("mangled .debug_line section"));
18710 /* Make sure that we parsed the extended op correctly. If e.g.
18711 we expected a different address size than the producer used,
18712 we may have read the wrong number of bytes. */
18713 if (line_ptr
!= extended_end
)
18715 complaint (&symfile_complaints
,
18716 _("mangled .debug_line section"));
18721 state_machine
.handle_copy ();
18723 case DW_LNS_advance_pc
:
18726 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18727 line_ptr
+= bytes_read
;
18729 state_machine
.handle_advance_pc (adjust
);
18732 case DW_LNS_advance_line
:
18735 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
18736 line_ptr
+= bytes_read
;
18738 state_machine
.handle_advance_line (line_delta
);
18741 case DW_LNS_set_file
:
18743 file_name_index file
18744 = (file_name_index
) read_unsigned_leb128 (abfd
, line_ptr
,
18746 line_ptr
+= bytes_read
;
18748 state_machine
.handle_set_file (file
);
18751 case DW_LNS_set_column
:
18752 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18753 line_ptr
+= bytes_read
;
18755 case DW_LNS_negate_stmt
:
18756 state_machine
.handle_negate_stmt ();
18758 case DW_LNS_set_basic_block
:
18760 /* Add to the address register of the state machine the
18761 address increment value corresponding to special opcode
18762 255. I.e., this value is scaled by the minimum
18763 instruction length since special opcode 255 would have
18764 scaled the increment. */
18765 case DW_LNS_const_add_pc
:
18766 state_machine
.handle_const_add_pc ();
18768 case DW_LNS_fixed_advance_pc
:
18770 CORE_ADDR addr_adj
= read_2_bytes (abfd
, line_ptr
);
18773 state_machine
.handle_fixed_advance_pc (addr_adj
);
18778 /* Unknown standard opcode, ignore it. */
18781 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
18783 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18784 line_ptr
+= bytes_read
;
18791 dwarf2_debug_line_missing_end_sequence_complaint ();
18793 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
18794 in which case we still finish recording the last line). */
18795 state_machine
.record_line (true);
18799 /* Decode the Line Number Program (LNP) for the given line_header
18800 structure and CU. The actual information extracted and the type
18801 of structures created from the LNP depends on the value of PST.
18803 1. If PST is NULL, then this procedure uses the data from the program
18804 to create all necessary symbol tables, and their linetables.
18806 2. If PST is not NULL, this procedure reads the program to determine
18807 the list of files included by the unit represented by PST, and
18808 builds all the associated partial symbol tables.
18810 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
18811 It is used for relative paths in the line table.
18812 NOTE: When processing partial symtabs (pst != NULL),
18813 comp_dir == pst->dirname.
18815 NOTE: It is important that psymtabs have the same file name (via strcmp)
18816 as the corresponding symtab. Since COMP_DIR is not used in the name of the
18817 symtab we don't use it in the name of the psymtabs we create.
18818 E.g. expand_line_sal requires this when finding psymtabs to expand.
18819 A good testcase for this is mb-inline.exp.
18821 LOWPC is the lowest address in CU (or 0 if not known).
18823 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
18824 for its PC<->lines mapping information. Otherwise only the filename
18825 table is read in. */
18828 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
18829 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
18830 CORE_ADDR lowpc
, int decode_mapping
)
18832 struct objfile
*objfile
= cu
->objfile
;
18833 const int decode_for_pst_p
= (pst
!= NULL
);
18835 if (decode_mapping
)
18836 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
18838 if (decode_for_pst_p
)
18842 /* Now that we're done scanning the Line Header Program, we can
18843 create the psymtab of each included file. */
18844 for (file_index
= 0; file_index
< lh
->file_names
.size (); file_index
++)
18845 if (lh
->file_names
[file_index
].included_p
== 1)
18847 const char *include_name
=
18848 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
18849 if (include_name
!= NULL
)
18850 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
18855 /* Make sure a symtab is created for every file, even files
18856 which contain only variables (i.e. no code with associated
18858 struct compunit_symtab
*cust
= buildsym_compunit_symtab ();
18861 for (i
= 0; i
< lh
->file_names
.size (); i
++)
18863 file_entry
&fe
= lh
->file_names
[i
];
18865 dwarf2_start_subfile (fe
.name
, fe
.include_dir (lh
));
18867 if (current_subfile
->symtab
== NULL
)
18869 current_subfile
->symtab
18870 = allocate_symtab (cust
, current_subfile
->name
);
18872 fe
.symtab
= current_subfile
->symtab
;
18877 /* Start a subfile for DWARF. FILENAME is the name of the file and
18878 DIRNAME the name of the source directory which contains FILENAME
18879 or NULL if not known.
18880 This routine tries to keep line numbers from identical absolute and
18881 relative file names in a common subfile.
18883 Using the `list' example from the GDB testsuite, which resides in
18884 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
18885 of /srcdir/list0.c yields the following debugging information for list0.c:
18887 DW_AT_name: /srcdir/list0.c
18888 DW_AT_comp_dir: /compdir
18889 files.files[0].name: list0.h
18890 files.files[0].dir: /srcdir
18891 files.files[1].name: list0.c
18892 files.files[1].dir: /srcdir
18894 The line number information for list0.c has to end up in a single
18895 subfile, so that `break /srcdir/list0.c:1' works as expected.
18896 start_subfile will ensure that this happens provided that we pass the
18897 concatenation of files.files[1].dir and files.files[1].name as the
18901 dwarf2_start_subfile (const char *filename
, const char *dirname
)
18905 /* In order not to lose the line information directory,
18906 we concatenate it to the filename when it makes sense.
18907 Note that the Dwarf3 standard says (speaking of filenames in line
18908 information): ``The directory index is ignored for file names
18909 that represent full path names''. Thus ignoring dirname in the
18910 `else' branch below isn't an issue. */
18912 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
18914 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
18918 start_subfile (filename
);
18924 /* Start a symtab for DWARF.
18925 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
18927 static struct compunit_symtab
*
18928 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
18929 const char *name
, const char *comp_dir
, CORE_ADDR low_pc
)
18931 struct compunit_symtab
*cust
18932 = start_symtab (cu
->objfile
, name
, comp_dir
, low_pc
);
18934 record_debugformat ("DWARF 2");
18935 record_producer (cu
->producer
);
18937 /* We assume that we're processing GCC output. */
18938 processing_gcc_compilation
= 2;
18940 cu
->processing_has_namespace_info
= 0;
18946 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
18947 struct dwarf2_cu
*cu
)
18949 struct objfile
*objfile
= cu
->objfile
;
18950 struct comp_unit_head
*cu_header
= &cu
->header
;
18952 /* NOTE drow/2003-01-30: There used to be a comment and some special
18953 code here to turn a symbol with DW_AT_external and a
18954 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
18955 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
18956 with some versions of binutils) where shared libraries could have
18957 relocations against symbols in their debug information - the
18958 minimal symbol would have the right address, but the debug info
18959 would not. It's no longer necessary, because we will explicitly
18960 apply relocations when we read in the debug information now. */
18962 /* A DW_AT_location attribute with no contents indicates that a
18963 variable has been optimized away. */
18964 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
18966 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
18970 /* Handle one degenerate form of location expression specially, to
18971 preserve GDB's previous behavior when section offsets are
18972 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
18973 then mark this symbol as LOC_STATIC. */
18975 if (attr_form_is_block (attr
)
18976 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
18977 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
18978 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
18979 && (DW_BLOCK (attr
)->size
18980 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
18982 unsigned int dummy
;
18984 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
18985 SYMBOL_VALUE_ADDRESS (sym
) =
18986 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
18988 SYMBOL_VALUE_ADDRESS (sym
) =
18989 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
18990 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
18991 fixup_symbol_section (sym
, objfile
);
18992 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
18993 SYMBOL_SECTION (sym
));
18997 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
18998 expression evaluator, and use LOC_COMPUTED only when necessary
18999 (i.e. when the value of a register or memory location is
19000 referenced, or a thread-local block, etc.). Then again, it might
19001 not be worthwhile. I'm assuming that it isn't unless performance
19002 or memory numbers show me otherwise. */
19004 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
19006 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
19007 cu
->has_loclist
= 1;
19010 /* Given a pointer to a DWARF information entry, figure out if we need
19011 to make a symbol table entry for it, and if so, create a new entry
19012 and return a pointer to it.
19013 If TYPE is NULL, determine symbol type from the die, otherwise
19014 used the passed type.
19015 If SPACE is not NULL, use it to hold the new symbol. If it is
19016 NULL, allocate a new symbol on the objfile's obstack. */
19018 static struct symbol
*
19019 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
19020 struct symbol
*space
)
19022 struct objfile
*objfile
= cu
->objfile
;
19023 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
19024 struct symbol
*sym
= NULL
;
19026 struct attribute
*attr
= NULL
;
19027 struct attribute
*attr2
= NULL
;
19028 CORE_ADDR baseaddr
;
19029 struct pending
**list_to_add
= NULL
;
19031 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
19033 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
19035 name
= dwarf2_name (die
, cu
);
19038 const char *linkagename
;
19039 int suppress_add
= 0;
19044 sym
= allocate_symbol (objfile
);
19045 OBJSTAT (objfile
, n_syms
++);
19047 /* Cache this symbol's name and the name's demangled form (if any). */
19048 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
19049 linkagename
= dwarf2_physname (name
, die
, cu
);
19050 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
19052 /* Fortran does not have mangling standard and the mangling does differ
19053 between gfortran, iFort etc. */
19054 if (cu
->language
== language_fortran
19055 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
19056 symbol_set_demangled_name (&(sym
->ginfo
),
19057 dwarf2_full_name (name
, die
, cu
),
19060 /* Default assumptions.
19061 Use the passed type or decode it from the die. */
19062 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
19063 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
19065 SYMBOL_TYPE (sym
) = type
;
19067 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
19068 attr
= dwarf2_attr (die
,
19069 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
19073 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
19076 attr
= dwarf2_attr (die
,
19077 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
19081 file_name_index file_index
= (file_name_index
) DW_UNSND (attr
);
19082 struct file_entry
*fe
;
19084 if (cu
->line_header
!= NULL
)
19085 fe
= cu
->line_header
->file_name_at (file_index
);
19090 complaint (&symfile_complaints
,
19091 _("file index out of range"));
19093 symbol_set_symtab (sym
, fe
->symtab
);
19099 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
19104 addr
= attr_value_as_address (attr
);
19105 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
19106 SYMBOL_VALUE_ADDRESS (sym
) = addr
;
19108 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
19109 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
19110 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
19111 add_symbol_to_list (sym
, cu
->list_in_scope
);
19113 case DW_TAG_subprogram
:
19114 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
19116 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
19117 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
19118 if ((attr2
&& (DW_UNSND (attr2
) != 0))
19119 || cu
->language
== language_ada
)
19121 /* Subprograms marked external are stored as a global symbol.
19122 Ada subprograms, whether marked external or not, are always
19123 stored as a global symbol, because we want to be able to
19124 access them globally. For instance, we want to be able
19125 to break on a nested subprogram without having to
19126 specify the context. */
19127 list_to_add
= &global_symbols
;
19131 list_to_add
= cu
->list_in_scope
;
19134 case DW_TAG_inlined_subroutine
:
19135 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
19137 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
19138 SYMBOL_INLINED (sym
) = 1;
19139 list_to_add
= cu
->list_in_scope
;
19141 case DW_TAG_template_value_param
:
19143 /* Fall through. */
19144 case DW_TAG_constant
:
19145 case DW_TAG_variable
:
19146 case DW_TAG_member
:
19147 /* Compilation with minimal debug info may result in
19148 variables with missing type entries. Change the
19149 misleading `void' type to something sensible. */
19150 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
19151 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_int
;
19153 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
19154 /* In the case of DW_TAG_member, we should only be called for
19155 static const members. */
19156 if (die
->tag
== DW_TAG_member
)
19158 /* dwarf2_add_field uses die_is_declaration,
19159 so we do the same. */
19160 gdb_assert (die_is_declaration (die
, cu
));
19165 dwarf2_const_value (attr
, sym
, cu
);
19166 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
19169 if (attr2
&& (DW_UNSND (attr2
) != 0))
19170 list_to_add
= &global_symbols
;
19172 list_to_add
= cu
->list_in_scope
;
19176 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
19179 var_decode_location (attr
, sym
, cu
);
19180 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
19182 /* Fortran explicitly imports any global symbols to the local
19183 scope by DW_TAG_common_block. */
19184 if (cu
->language
== language_fortran
&& die
->parent
19185 && die
->parent
->tag
== DW_TAG_common_block
)
19188 if (SYMBOL_CLASS (sym
) == LOC_STATIC
19189 && SYMBOL_VALUE_ADDRESS (sym
) == 0
19190 && !dwarf2_per_objfile
->has_section_at_zero
)
19192 /* When a static variable is eliminated by the linker,
19193 the corresponding debug information is not stripped
19194 out, but the variable address is set to null;
19195 do not add such variables into symbol table. */
19197 else if (attr2
&& (DW_UNSND (attr2
) != 0))
19199 /* Workaround gfortran PR debug/40040 - it uses
19200 DW_AT_location for variables in -fPIC libraries which may
19201 get overriden by other libraries/executable and get
19202 a different address. Resolve it by the minimal symbol
19203 which may come from inferior's executable using copy
19204 relocation. Make this workaround only for gfortran as for
19205 other compilers GDB cannot guess the minimal symbol
19206 Fortran mangling kind. */
19207 if (cu
->language
== language_fortran
&& die
->parent
19208 && die
->parent
->tag
== DW_TAG_module
19210 && startswith (cu
->producer
, "GNU Fortran"))
19211 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
19213 /* A variable with DW_AT_external is never static,
19214 but it may be block-scoped. */
19215 list_to_add
= (cu
->list_in_scope
== &file_symbols
19216 ? &global_symbols
: cu
->list_in_scope
);
19219 list_to_add
= cu
->list_in_scope
;
19223 /* We do not know the address of this symbol.
19224 If it is an external symbol and we have type information
19225 for it, enter the symbol as a LOC_UNRESOLVED symbol.
19226 The address of the variable will then be determined from
19227 the minimal symbol table whenever the variable is
19229 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
19231 /* Fortran explicitly imports any global symbols to the local
19232 scope by DW_TAG_common_block. */
19233 if (cu
->language
== language_fortran
&& die
->parent
19234 && die
->parent
->tag
== DW_TAG_common_block
)
19236 /* SYMBOL_CLASS doesn't matter here because
19237 read_common_block is going to reset it. */
19239 list_to_add
= cu
->list_in_scope
;
19241 else if (attr2
&& (DW_UNSND (attr2
) != 0)
19242 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
19244 /* A variable with DW_AT_external is never static, but it
19245 may be block-scoped. */
19246 list_to_add
= (cu
->list_in_scope
== &file_symbols
19247 ? &global_symbols
: cu
->list_in_scope
);
19249 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
19251 else if (!die_is_declaration (die
, cu
))
19253 /* Use the default LOC_OPTIMIZED_OUT class. */
19254 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
19256 list_to_add
= cu
->list_in_scope
;
19260 case DW_TAG_formal_parameter
:
19261 /* If we are inside a function, mark this as an argument. If
19262 not, we might be looking at an argument to an inlined function
19263 when we do not have enough information to show inlined frames;
19264 pretend it's a local variable in that case so that the user can
19266 if (context_stack_depth
> 0
19267 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
19268 SYMBOL_IS_ARGUMENT (sym
) = 1;
19269 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
19272 var_decode_location (attr
, sym
, cu
);
19274 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
19277 dwarf2_const_value (attr
, sym
, cu
);
19280 list_to_add
= cu
->list_in_scope
;
19282 case DW_TAG_unspecified_parameters
:
19283 /* From varargs functions; gdb doesn't seem to have any
19284 interest in this information, so just ignore it for now.
19287 case DW_TAG_template_type_param
:
19289 /* Fall through. */
19290 case DW_TAG_class_type
:
19291 case DW_TAG_interface_type
:
19292 case DW_TAG_structure_type
:
19293 case DW_TAG_union_type
:
19294 case DW_TAG_set_type
:
19295 case DW_TAG_enumeration_type
:
19296 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
19297 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
19300 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
19301 really ever be static objects: otherwise, if you try
19302 to, say, break of a class's method and you're in a file
19303 which doesn't mention that class, it won't work unless
19304 the check for all static symbols in lookup_symbol_aux
19305 saves you. See the OtherFileClass tests in
19306 gdb.c++/namespace.exp. */
19310 list_to_add
= (cu
->list_in_scope
== &file_symbols
19311 && cu
->language
== language_cplus
19312 ? &global_symbols
: cu
->list_in_scope
);
19314 /* The semantics of C++ state that "struct foo {
19315 ... }" also defines a typedef for "foo". */
19316 if (cu
->language
== language_cplus
19317 || cu
->language
== language_ada
19318 || cu
->language
== language_d
19319 || cu
->language
== language_rust
)
19321 /* The symbol's name is already allocated along
19322 with this objfile, so we don't need to
19323 duplicate it for the type. */
19324 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
19325 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
19330 case DW_TAG_typedef
:
19331 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
19332 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
19333 list_to_add
= cu
->list_in_scope
;
19335 case DW_TAG_base_type
:
19336 case DW_TAG_subrange_type
:
19337 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
19338 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
19339 list_to_add
= cu
->list_in_scope
;
19341 case DW_TAG_enumerator
:
19342 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
19345 dwarf2_const_value (attr
, sym
, cu
);
19348 /* NOTE: carlton/2003-11-10: See comment above in the
19349 DW_TAG_class_type, etc. block. */
19351 list_to_add
= (cu
->list_in_scope
== &file_symbols
19352 && cu
->language
== language_cplus
19353 ? &global_symbols
: cu
->list_in_scope
);
19356 case DW_TAG_imported_declaration
:
19357 case DW_TAG_namespace
:
19358 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
19359 list_to_add
= &global_symbols
;
19361 case DW_TAG_module
:
19362 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
19363 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
19364 list_to_add
= &global_symbols
;
19366 case DW_TAG_common_block
:
19367 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
19368 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
19369 add_symbol_to_list (sym
, cu
->list_in_scope
);
19372 /* Not a tag we recognize. Hopefully we aren't processing
19373 trash data, but since we must specifically ignore things
19374 we don't recognize, there is nothing else we should do at
19376 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
19377 dwarf_tag_name (die
->tag
));
19383 sym
->hash_next
= objfile
->template_symbols
;
19384 objfile
->template_symbols
= sym
;
19385 list_to_add
= NULL
;
19388 if (list_to_add
!= NULL
)
19389 add_symbol_to_list (sym
, list_to_add
);
19391 /* For the benefit of old versions of GCC, check for anonymous
19392 namespaces based on the demangled name. */
19393 if (!cu
->processing_has_namespace_info
19394 && cu
->language
== language_cplus
)
19395 cp_scan_for_anonymous_namespaces (sym
, objfile
);
19400 /* A wrapper for new_symbol_full that always allocates a new symbol. */
19402 static struct symbol
*
19403 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
19405 return new_symbol_full (die
, type
, cu
, NULL
);
19408 /* Given an attr with a DW_FORM_dataN value in host byte order,
19409 zero-extend it as appropriate for the symbol's type. The DWARF
19410 standard (v4) is not entirely clear about the meaning of using
19411 DW_FORM_dataN for a constant with a signed type, where the type is
19412 wider than the data. The conclusion of a discussion on the DWARF
19413 list was that this is unspecified. We choose to always zero-extend
19414 because that is the interpretation long in use by GCC. */
19417 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
19418 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
19420 struct objfile
*objfile
= cu
->objfile
;
19421 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
19422 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
19423 LONGEST l
= DW_UNSND (attr
);
19425 if (bits
< sizeof (*value
) * 8)
19427 l
&= ((LONGEST
) 1 << bits
) - 1;
19430 else if (bits
== sizeof (*value
) * 8)
19434 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
19435 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
19442 /* Read a constant value from an attribute. Either set *VALUE, or if
19443 the value does not fit in *VALUE, set *BYTES - either already
19444 allocated on the objfile obstack, or newly allocated on OBSTACK,
19445 or, set *BATON, if we translated the constant to a location
19449 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
19450 const char *name
, struct obstack
*obstack
,
19451 struct dwarf2_cu
*cu
,
19452 LONGEST
*value
, const gdb_byte
**bytes
,
19453 struct dwarf2_locexpr_baton
**baton
)
19455 struct objfile
*objfile
= cu
->objfile
;
19456 struct comp_unit_head
*cu_header
= &cu
->header
;
19457 struct dwarf_block
*blk
;
19458 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
19459 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
19465 switch (attr
->form
)
19468 case DW_FORM_GNU_addr_index
:
19472 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
19473 dwarf2_const_value_length_mismatch_complaint (name
,
19474 cu_header
->addr_size
,
19475 TYPE_LENGTH (type
));
19476 /* Symbols of this form are reasonably rare, so we just
19477 piggyback on the existing location code rather than writing
19478 a new implementation of symbol_computed_ops. */
19479 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
19480 (*baton
)->per_cu
= cu
->per_cu
;
19481 gdb_assert ((*baton
)->per_cu
);
19483 (*baton
)->size
= 2 + cu_header
->addr_size
;
19484 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
19485 (*baton
)->data
= data
;
19487 data
[0] = DW_OP_addr
;
19488 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
19489 byte_order
, DW_ADDR (attr
));
19490 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
19493 case DW_FORM_string
:
19495 case DW_FORM_GNU_str_index
:
19496 case DW_FORM_GNU_strp_alt
:
19497 /* DW_STRING is already allocated on the objfile obstack, point
19499 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
19501 case DW_FORM_block1
:
19502 case DW_FORM_block2
:
19503 case DW_FORM_block4
:
19504 case DW_FORM_block
:
19505 case DW_FORM_exprloc
:
19506 case DW_FORM_data16
:
19507 blk
= DW_BLOCK (attr
);
19508 if (TYPE_LENGTH (type
) != blk
->size
)
19509 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
19510 TYPE_LENGTH (type
));
19511 *bytes
= blk
->data
;
19514 /* The DW_AT_const_value attributes are supposed to carry the
19515 symbol's value "represented as it would be on the target
19516 architecture." By the time we get here, it's already been
19517 converted to host endianness, so we just need to sign- or
19518 zero-extend it as appropriate. */
19519 case DW_FORM_data1
:
19520 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
19522 case DW_FORM_data2
:
19523 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
19525 case DW_FORM_data4
:
19526 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
19528 case DW_FORM_data8
:
19529 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
19532 case DW_FORM_sdata
:
19533 case DW_FORM_implicit_const
:
19534 *value
= DW_SND (attr
);
19537 case DW_FORM_udata
:
19538 *value
= DW_UNSND (attr
);
19542 complaint (&symfile_complaints
,
19543 _("unsupported const value attribute form: '%s'"),
19544 dwarf_form_name (attr
->form
));
19551 /* Copy constant value from an attribute to a symbol. */
19554 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
19555 struct dwarf2_cu
*cu
)
19557 struct objfile
*objfile
= cu
->objfile
;
19559 const gdb_byte
*bytes
;
19560 struct dwarf2_locexpr_baton
*baton
;
19562 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
19563 SYMBOL_PRINT_NAME (sym
),
19564 &objfile
->objfile_obstack
, cu
,
19565 &value
, &bytes
, &baton
);
19569 SYMBOL_LOCATION_BATON (sym
) = baton
;
19570 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
19572 else if (bytes
!= NULL
)
19574 SYMBOL_VALUE_BYTES (sym
) = bytes
;
19575 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
19579 SYMBOL_VALUE (sym
) = value
;
19580 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
19584 /* Return the type of the die in question using its DW_AT_type attribute. */
19586 static struct type
*
19587 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
19589 struct attribute
*type_attr
;
19591 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
19594 /* A missing DW_AT_type represents a void type. */
19595 return objfile_type (cu
->objfile
)->builtin_void
;
19598 return lookup_die_type (die
, type_attr
, cu
);
19601 /* True iff CU's producer generates GNAT Ada auxiliary information
19602 that allows to find parallel types through that information instead
19603 of having to do expensive parallel lookups by type name. */
19606 need_gnat_info (struct dwarf2_cu
*cu
)
19608 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
19609 of GNAT produces this auxiliary information, without any indication
19610 that it is produced. Part of enhancing the FSF version of GNAT
19611 to produce that information will be to put in place an indicator
19612 that we can use in order to determine whether the descriptive type
19613 info is available or not. One suggestion that has been made is
19614 to use a new attribute, attached to the CU die. For now, assume
19615 that the descriptive type info is not available. */
19619 /* Return the auxiliary type of the die in question using its
19620 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
19621 attribute is not present. */
19623 static struct type
*
19624 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
19626 struct attribute
*type_attr
;
19628 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
19632 return lookup_die_type (die
, type_attr
, cu
);
19635 /* If DIE has a descriptive_type attribute, then set the TYPE's
19636 descriptive type accordingly. */
19639 set_descriptive_type (struct type
*type
, struct die_info
*die
,
19640 struct dwarf2_cu
*cu
)
19642 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
19644 if (descriptive_type
)
19646 ALLOCATE_GNAT_AUX_TYPE (type
);
19647 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
19651 /* Return the containing type of the die in question using its
19652 DW_AT_containing_type attribute. */
19654 static struct type
*
19655 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
19657 struct attribute
*type_attr
;
19659 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
19661 error (_("Dwarf Error: Problem turning containing type into gdb type "
19662 "[in module %s]"), objfile_name (cu
->objfile
));
19664 return lookup_die_type (die
, type_attr
, cu
);
19667 /* Return an error marker type to use for the ill formed type in DIE/CU. */
19669 static struct type
*
19670 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
19672 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19673 char *message
, *saved
;
19675 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
19676 objfile_name (objfile
),
19677 to_underlying (cu
->header
.sect_off
),
19678 to_underlying (die
->sect_off
));
19679 saved
= (char *) obstack_copy0 (&objfile
->objfile_obstack
,
19680 message
, strlen (message
));
19683 return init_type (objfile
, TYPE_CODE_ERROR
, 0, saved
);
19686 /* Look up the type of DIE in CU using its type attribute ATTR.
19687 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
19688 DW_AT_containing_type.
19689 If there is no type substitute an error marker. */
19691 static struct type
*
19692 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
19693 struct dwarf2_cu
*cu
)
19695 struct objfile
*objfile
= cu
->objfile
;
19696 struct type
*this_type
;
19698 gdb_assert (attr
->name
== DW_AT_type
19699 || attr
->name
== DW_AT_GNAT_descriptive_type
19700 || attr
->name
== DW_AT_containing_type
);
19702 /* First see if we have it cached. */
19704 if (attr
->form
== DW_FORM_GNU_ref_alt
)
19706 struct dwarf2_per_cu_data
*per_cu
;
19707 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
19709 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, 1, cu
->objfile
);
19710 this_type
= get_die_type_at_offset (sect_off
, per_cu
);
19712 else if (attr_form_is_ref (attr
))
19714 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
19716 this_type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
19718 else if (attr
->form
== DW_FORM_ref_sig8
)
19720 ULONGEST signature
= DW_SIGNATURE (attr
);
19722 return get_signatured_type (die
, signature
, cu
);
19726 complaint (&symfile_complaints
,
19727 _("Dwarf Error: Bad type attribute %s in DIE"
19728 " at 0x%x [in module %s]"),
19729 dwarf_attr_name (attr
->name
), to_underlying (die
->sect_off
),
19730 objfile_name (objfile
));
19731 return build_error_marker_type (cu
, die
);
19734 /* If not cached we need to read it in. */
19736 if (this_type
== NULL
)
19738 struct die_info
*type_die
= NULL
;
19739 struct dwarf2_cu
*type_cu
= cu
;
19741 if (attr_form_is_ref (attr
))
19742 type_die
= follow_die_ref (die
, attr
, &type_cu
);
19743 if (type_die
== NULL
)
19744 return build_error_marker_type (cu
, die
);
19745 /* If we find the type now, it's probably because the type came
19746 from an inter-CU reference and the type's CU got expanded before
19748 this_type
= read_type_die (type_die
, type_cu
);
19751 /* If we still don't have a type use an error marker. */
19753 if (this_type
== NULL
)
19754 return build_error_marker_type (cu
, die
);
19759 /* Return the type in DIE, CU.
19760 Returns NULL for invalid types.
19762 This first does a lookup in die_type_hash,
19763 and only reads the die in if necessary.
19765 NOTE: This can be called when reading in partial or full symbols. */
19767 static struct type
*
19768 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
19770 struct type
*this_type
;
19772 this_type
= get_die_type (die
, cu
);
19776 return read_type_die_1 (die
, cu
);
19779 /* Read the type in DIE, CU.
19780 Returns NULL for invalid types. */
19782 static struct type
*
19783 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
19785 struct type
*this_type
= NULL
;
19789 case DW_TAG_class_type
:
19790 case DW_TAG_interface_type
:
19791 case DW_TAG_structure_type
:
19792 case DW_TAG_union_type
:
19793 this_type
= read_structure_type (die
, cu
);
19795 case DW_TAG_enumeration_type
:
19796 this_type
= read_enumeration_type (die
, cu
);
19798 case DW_TAG_subprogram
:
19799 case DW_TAG_subroutine_type
:
19800 case DW_TAG_inlined_subroutine
:
19801 this_type
= read_subroutine_type (die
, cu
);
19803 case DW_TAG_array_type
:
19804 this_type
= read_array_type (die
, cu
);
19806 case DW_TAG_set_type
:
19807 this_type
= read_set_type (die
, cu
);
19809 case DW_TAG_pointer_type
:
19810 this_type
= read_tag_pointer_type (die
, cu
);
19812 case DW_TAG_ptr_to_member_type
:
19813 this_type
= read_tag_ptr_to_member_type (die
, cu
);
19815 case DW_TAG_reference_type
:
19816 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_REF
);
19818 case DW_TAG_rvalue_reference_type
:
19819 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_RVALUE_REF
);
19821 case DW_TAG_const_type
:
19822 this_type
= read_tag_const_type (die
, cu
);
19824 case DW_TAG_volatile_type
:
19825 this_type
= read_tag_volatile_type (die
, cu
);
19827 case DW_TAG_restrict_type
:
19828 this_type
= read_tag_restrict_type (die
, cu
);
19830 case DW_TAG_string_type
:
19831 this_type
= read_tag_string_type (die
, cu
);
19833 case DW_TAG_typedef
:
19834 this_type
= read_typedef (die
, cu
);
19836 case DW_TAG_subrange_type
:
19837 this_type
= read_subrange_type (die
, cu
);
19839 case DW_TAG_base_type
:
19840 this_type
= read_base_type (die
, cu
);
19842 case DW_TAG_unspecified_type
:
19843 this_type
= read_unspecified_type (die
, cu
);
19845 case DW_TAG_namespace
:
19846 this_type
= read_namespace_type (die
, cu
);
19848 case DW_TAG_module
:
19849 this_type
= read_module_type (die
, cu
);
19851 case DW_TAG_atomic_type
:
19852 this_type
= read_tag_atomic_type (die
, cu
);
19855 complaint (&symfile_complaints
,
19856 _("unexpected tag in read_type_die: '%s'"),
19857 dwarf_tag_name (die
->tag
));
19864 /* See if we can figure out if the class lives in a namespace. We do
19865 this by looking for a member function; its demangled name will
19866 contain namespace info, if there is any.
19867 Return the computed name or NULL.
19868 Space for the result is allocated on the objfile's obstack.
19869 This is the full-die version of guess_partial_die_structure_name.
19870 In this case we know DIE has no useful parent. */
19873 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19875 struct die_info
*spec_die
;
19876 struct dwarf2_cu
*spec_cu
;
19877 struct die_info
*child
;
19880 spec_die
= die_specification (die
, &spec_cu
);
19881 if (spec_die
!= NULL
)
19887 for (child
= die
->child
;
19889 child
= child
->sibling
)
19891 if (child
->tag
== DW_TAG_subprogram
)
19893 const char *linkage_name
= dw2_linkage_name (child
, cu
);
19895 if (linkage_name
!= NULL
)
19898 = language_class_name_from_physname (cu
->language_defn
,
19902 if (actual_name
!= NULL
)
19904 const char *die_name
= dwarf2_name (die
, cu
);
19906 if (die_name
!= NULL
19907 && strcmp (die_name
, actual_name
) != 0)
19909 /* Strip off the class name from the full name.
19910 We want the prefix. */
19911 int die_name_len
= strlen (die_name
);
19912 int actual_name_len
= strlen (actual_name
);
19914 /* Test for '::' as a sanity check. */
19915 if (actual_name_len
> die_name_len
+ 2
19916 && actual_name
[actual_name_len
19917 - die_name_len
- 1] == ':')
19918 name
= (char *) obstack_copy0 (
19919 &cu
->objfile
->per_bfd
->storage_obstack
,
19920 actual_name
, actual_name_len
- die_name_len
- 2);
19923 xfree (actual_name
);
19932 /* GCC might emit a nameless typedef that has a linkage name. Determine the
19933 prefix part in such case. See
19934 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
19936 static const char *
19937 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
19939 struct attribute
*attr
;
19942 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
19943 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
19946 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
19949 attr
= dw2_linkage_name_attr (die
, cu
);
19950 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
19953 /* dwarf2_name had to be already called. */
19954 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
19956 /* Strip the base name, keep any leading namespaces/classes. */
19957 base
= strrchr (DW_STRING (attr
), ':');
19958 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
19961 return (char *) obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
19963 &base
[-1] - DW_STRING (attr
));
19966 /* Return the name of the namespace/class that DIE is defined within,
19967 or "" if we can't tell. The caller should not xfree the result.
19969 For example, if we're within the method foo() in the following
19979 then determine_prefix on foo's die will return "N::C". */
19981 static const char *
19982 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
19984 struct die_info
*parent
, *spec_die
;
19985 struct dwarf2_cu
*spec_cu
;
19986 struct type
*parent_type
;
19987 const char *retval
;
19989 if (cu
->language
!= language_cplus
19990 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
19991 && cu
->language
!= language_rust
)
19994 retval
= anonymous_struct_prefix (die
, cu
);
19998 /* We have to be careful in the presence of DW_AT_specification.
19999 For example, with GCC 3.4, given the code
20003 // Definition of N::foo.
20007 then we'll have a tree of DIEs like this:
20009 1: DW_TAG_compile_unit
20010 2: DW_TAG_namespace // N
20011 3: DW_TAG_subprogram // declaration of N::foo
20012 4: DW_TAG_subprogram // definition of N::foo
20013 DW_AT_specification // refers to die #3
20015 Thus, when processing die #4, we have to pretend that we're in
20016 the context of its DW_AT_specification, namely the contex of die
20019 spec_die
= die_specification (die
, &spec_cu
);
20020 if (spec_die
== NULL
)
20021 parent
= die
->parent
;
20024 parent
= spec_die
->parent
;
20028 if (parent
== NULL
)
20030 else if (parent
->building_fullname
)
20033 const char *parent_name
;
20035 /* It has been seen on RealView 2.2 built binaries,
20036 DW_TAG_template_type_param types actually _defined_ as
20037 children of the parent class:
20040 template class <class Enum> Class{};
20041 Class<enum E> class_e;
20043 1: DW_TAG_class_type (Class)
20044 2: DW_TAG_enumeration_type (E)
20045 3: DW_TAG_enumerator (enum1:0)
20046 3: DW_TAG_enumerator (enum2:1)
20048 2: DW_TAG_template_type_param
20049 DW_AT_type DW_FORM_ref_udata (E)
20051 Besides being broken debug info, it can put GDB into an
20052 infinite loop. Consider:
20054 When we're building the full name for Class<E>, we'll start
20055 at Class, and go look over its template type parameters,
20056 finding E. We'll then try to build the full name of E, and
20057 reach here. We're now trying to build the full name of E,
20058 and look over the parent DIE for containing scope. In the
20059 broken case, if we followed the parent DIE of E, we'd again
20060 find Class, and once again go look at its template type
20061 arguments, etc., etc. Simply don't consider such parent die
20062 as source-level parent of this die (it can't be, the language
20063 doesn't allow it), and break the loop here. */
20064 name
= dwarf2_name (die
, cu
);
20065 parent_name
= dwarf2_name (parent
, cu
);
20066 complaint (&symfile_complaints
,
20067 _("template param type '%s' defined within parent '%s'"),
20068 name
? name
: "<unknown>",
20069 parent_name
? parent_name
: "<unknown>");
20073 switch (parent
->tag
)
20075 case DW_TAG_namespace
:
20076 parent_type
= read_type_die (parent
, cu
);
20077 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
20078 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
20079 Work around this problem here. */
20080 if (cu
->language
== language_cplus
20081 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
20083 /* We give a name to even anonymous namespaces. */
20084 return TYPE_TAG_NAME (parent_type
);
20085 case DW_TAG_class_type
:
20086 case DW_TAG_interface_type
:
20087 case DW_TAG_structure_type
:
20088 case DW_TAG_union_type
:
20089 case DW_TAG_module
:
20090 parent_type
= read_type_die (parent
, cu
);
20091 if (TYPE_TAG_NAME (parent_type
) != NULL
)
20092 return TYPE_TAG_NAME (parent_type
);
20094 /* An anonymous structure is only allowed non-static data
20095 members; no typedefs, no member functions, et cetera.
20096 So it does not need a prefix. */
20098 case DW_TAG_compile_unit
:
20099 case DW_TAG_partial_unit
:
20100 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
20101 if (cu
->language
== language_cplus
20102 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
20103 && die
->child
!= NULL
20104 && (die
->tag
== DW_TAG_class_type
20105 || die
->tag
== DW_TAG_structure_type
20106 || die
->tag
== DW_TAG_union_type
))
20108 char *name
= guess_full_die_structure_name (die
, cu
);
20113 case DW_TAG_enumeration_type
:
20114 parent_type
= read_type_die (parent
, cu
);
20115 if (TYPE_DECLARED_CLASS (parent_type
))
20117 if (TYPE_TAG_NAME (parent_type
) != NULL
)
20118 return TYPE_TAG_NAME (parent_type
);
20121 /* Fall through. */
20123 return determine_prefix (parent
, cu
);
20127 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
20128 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
20129 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
20130 an obconcat, otherwise allocate storage for the result. The CU argument is
20131 used to determine the language and hence, the appropriate separator. */
20133 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
20136 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
20137 int physname
, struct dwarf2_cu
*cu
)
20139 const char *lead
= "";
20142 if (suffix
== NULL
|| suffix
[0] == '\0'
20143 || prefix
== NULL
|| prefix
[0] == '\0')
20145 else if (cu
->language
== language_d
)
20147 /* For D, the 'main' function could be defined in any module, but it
20148 should never be prefixed. */
20149 if (strcmp (suffix
, "D main") == 0)
20157 else if (cu
->language
== language_fortran
&& physname
)
20159 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
20160 DW_AT_MIPS_linkage_name is preferred and used instead. */
20168 if (prefix
== NULL
)
20170 if (suffix
== NULL
)
20177 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
20179 strcpy (retval
, lead
);
20180 strcat (retval
, prefix
);
20181 strcat (retval
, sep
);
20182 strcat (retval
, suffix
);
20187 /* We have an obstack. */
20188 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
20192 /* Return sibling of die, NULL if no sibling. */
20194 static struct die_info
*
20195 sibling_die (struct die_info
*die
)
20197 return die
->sibling
;
20200 /* Get name of a die, return NULL if not found. */
20202 static const char *
20203 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
20204 struct obstack
*obstack
)
20206 if (name
&& cu
->language
== language_cplus
)
20208 std::string canon_name
= cp_canonicalize_string (name
);
20210 if (!canon_name
.empty ())
20212 if (canon_name
!= name
)
20213 name
= (const char *) obstack_copy0 (obstack
,
20214 canon_name
.c_str (),
20215 canon_name
.length ());
20222 /* Get name of a die, return NULL if not found.
20223 Anonymous namespaces are converted to their magic string. */
20225 static const char *
20226 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
20228 struct attribute
*attr
;
20230 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
20231 if ((!attr
|| !DW_STRING (attr
))
20232 && die
->tag
!= DW_TAG_namespace
20233 && die
->tag
!= DW_TAG_class_type
20234 && die
->tag
!= DW_TAG_interface_type
20235 && die
->tag
!= DW_TAG_structure_type
20236 && die
->tag
!= DW_TAG_union_type
)
20241 case DW_TAG_compile_unit
:
20242 case DW_TAG_partial_unit
:
20243 /* Compilation units have a DW_AT_name that is a filename, not
20244 a source language identifier. */
20245 case DW_TAG_enumeration_type
:
20246 case DW_TAG_enumerator
:
20247 /* These tags always have simple identifiers already; no need
20248 to canonicalize them. */
20249 return DW_STRING (attr
);
20251 case DW_TAG_namespace
:
20252 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
20253 return DW_STRING (attr
);
20254 return CP_ANONYMOUS_NAMESPACE_STR
;
20256 case DW_TAG_class_type
:
20257 case DW_TAG_interface_type
:
20258 case DW_TAG_structure_type
:
20259 case DW_TAG_union_type
:
20260 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
20261 structures or unions. These were of the form "._%d" in GCC 4.1,
20262 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
20263 and GCC 4.4. We work around this problem by ignoring these. */
20264 if (attr
&& DW_STRING (attr
)
20265 && (startswith (DW_STRING (attr
), "._")
20266 || startswith (DW_STRING (attr
), "<anonymous")))
20269 /* GCC might emit a nameless typedef that has a linkage name. See
20270 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
20271 if (!attr
|| DW_STRING (attr
) == NULL
)
20273 char *demangled
= NULL
;
20275 attr
= dw2_linkage_name_attr (die
, cu
);
20276 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
20279 /* Avoid demangling DW_STRING (attr) the second time on a second
20280 call for the same DIE. */
20281 if (!DW_STRING_IS_CANONICAL (attr
))
20282 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
20288 /* FIXME: we already did this for the partial symbol... */
20291 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
20292 demangled
, strlen (demangled
)));
20293 DW_STRING_IS_CANONICAL (attr
) = 1;
20296 /* Strip any leading namespaces/classes, keep only the base name.
20297 DW_AT_name for named DIEs does not contain the prefixes. */
20298 base
= strrchr (DW_STRING (attr
), ':');
20299 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
20302 return DW_STRING (attr
);
20311 if (!DW_STRING_IS_CANONICAL (attr
))
20314 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
20315 &cu
->objfile
->per_bfd
->storage_obstack
);
20316 DW_STRING_IS_CANONICAL (attr
) = 1;
20318 return DW_STRING (attr
);
20321 /* Return the die that this die in an extension of, or NULL if there
20322 is none. *EXT_CU is the CU containing DIE on input, and the CU
20323 containing the return value on output. */
20325 static struct die_info
*
20326 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
20328 struct attribute
*attr
;
20330 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
20334 return follow_die_ref (die
, attr
, ext_cu
);
20337 /* Convert a DIE tag into its string name. */
20339 static const char *
20340 dwarf_tag_name (unsigned tag
)
20342 const char *name
= get_DW_TAG_name (tag
);
20345 return "DW_TAG_<unknown>";
20350 /* Convert a DWARF attribute code into its string name. */
20352 static const char *
20353 dwarf_attr_name (unsigned attr
)
20357 #ifdef MIPS /* collides with DW_AT_HP_block_index */
20358 if (attr
== DW_AT_MIPS_fde
)
20359 return "DW_AT_MIPS_fde";
20361 if (attr
== DW_AT_HP_block_index
)
20362 return "DW_AT_HP_block_index";
20365 name
= get_DW_AT_name (attr
);
20368 return "DW_AT_<unknown>";
20373 /* Convert a DWARF value form code into its string name. */
20375 static const char *
20376 dwarf_form_name (unsigned form
)
20378 const char *name
= get_DW_FORM_name (form
);
20381 return "DW_FORM_<unknown>";
20386 static const char *
20387 dwarf_bool_name (unsigned mybool
)
20395 /* Convert a DWARF type code into its string name. */
20397 static const char *
20398 dwarf_type_encoding_name (unsigned enc
)
20400 const char *name
= get_DW_ATE_name (enc
);
20403 return "DW_ATE_<unknown>";
20409 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
20413 print_spaces (indent
, f
);
20414 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
20415 dwarf_tag_name (die
->tag
), die
->abbrev
,
20416 to_underlying (die
->sect_off
));
20418 if (die
->parent
!= NULL
)
20420 print_spaces (indent
, f
);
20421 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
20422 to_underlying (die
->parent
->sect_off
));
20425 print_spaces (indent
, f
);
20426 fprintf_unfiltered (f
, " has children: %s\n",
20427 dwarf_bool_name (die
->child
!= NULL
));
20429 print_spaces (indent
, f
);
20430 fprintf_unfiltered (f
, " attributes:\n");
20432 for (i
= 0; i
< die
->num_attrs
; ++i
)
20434 print_spaces (indent
, f
);
20435 fprintf_unfiltered (f
, " %s (%s) ",
20436 dwarf_attr_name (die
->attrs
[i
].name
),
20437 dwarf_form_name (die
->attrs
[i
].form
));
20439 switch (die
->attrs
[i
].form
)
20442 case DW_FORM_GNU_addr_index
:
20443 fprintf_unfiltered (f
, "address: ");
20444 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
20446 case DW_FORM_block2
:
20447 case DW_FORM_block4
:
20448 case DW_FORM_block
:
20449 case DW_FORM_block1
:
20450 fprintf_unfiltered (f
, "block: size %s",
20451 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
20453 case DW_FORM_exprloc
:
20454 fprintf_unfiltered (f
, "expression: size %s",
20455 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
20457 case DW_FORM_data16
:
20458 fprintf_unfiltered (f
, "constant of 16 bytes");
20460 case DW_FORM_ref_addr
:
20461 fprintf_unfiltered (f
, "ref address: ");
20462 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
20464 case DW_FORM_GNU_ref_alt
:
20465 fprintf_unfiltered (f
, "alt ref address: ");
20466 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
20472 case DW_FORM_ref_udata
:
20473 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
20474 (long) (DW_UNSND (&die
->attrs
[i
])));
20476 case DW_FORM_data1
:
20477 case DW_FORM_data2
:
20478 case DW_FORM_data4
:
20479 case DW_FORM_data8
:
20480 case DW_FORM_udata
:
20481 case DW_FORM_sdata
:
20482 fprintf_unfiltered (f
, "constant: %s",
20483 pulongest (DW_UNSND (&die
->attrs
[i
])));
20485 case DW_FORM_sec_offset
:
20486 fprintf_unfiltered (f
, "section offset: %s",
20487 pulongest (DW_UNSND (&die
->attrs
[i
])));
20489 case DW_FORM_ref_sig8
:
20490 fprintf_unfiltered (f
, "signature: %s",
20491 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
20493 case DW_FORM_string
:
20495 case DW_FORM_line_strp
:
20496 case DW_FORM_GNU_str_index
:
20497 case DW_FORM_GNU_strp_alt
:
20498 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
20499 DW_STRING (&die
->attrs
[i
])
20500 ? DW_STRING (&die
->attrs
[i
]) : "",
20501 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
20504 if (DW_UNSND (&die
->attrs
[i
]))
20505 fprintf_unfiltered (f
, "flag: TRUE");
20507 fprintf_unfiltered (f
, "flag: FALSE");
20509 case DW_FORM_flag_present
:
20510 fprintf_unfiltered (f
, "flag: TRUE");
20512 case DW_FORM_indirect
:
20513 /* The reader will have reduced the indirect form to
20514 the "base form" so this form should not occur. */
20515 fprintf_unfiltered (f
,
20516 "unexpected attribute form: DW_FORM_indirect");
20518 case DW_FORM_implicit_const
:
20519 fprintf_unfiltered (f
, "constant: %s",
20520 plongest (DW_SND (&die
->attrs
[i
])));
20523 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
20524 die
->attrs
[i
].form
);
20527 fprintf_unfiltered (f
, "\n");
20532 dump_die_for_error (struct die_info
*die
)
20534 dump_die_shallow (gdb_stderr
, 0, die
);
20538 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
20540 int indent
= level
* 4;
20542 gdb_assert (die
!= NULL
);
20544 if (level
>= max_level
)
20547 dump_die_shallow (f
, indent
, die
);
20549 if (die
->child
!= NULL
)
20551 print_spaces (indent
, f
);
20552 fprintf_unfiltered (f
, " Children:");
20553 if (level
+ 1 < max_level
)
20555 fprintf_unfiltered (f
, "\n");
20556 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
20560 fprintf_unfiltered (f
,
20561 " [not printed, max nesting level reached]\n");
20565 if (die
->sibling
!= NULL
&& level
> 0)
20567 dump_die_1 (f
, level
, max_level
, die
->sibling
);
20571 /* This is called from the pdie macro in gdbinit.in.
20572 It's not static so gcc will keep a copy callable from gdb. */
20575 dump_die (struct die_info
*die
, int max_level
)
20577 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
20581 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
20585 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
,
20586 to_underlying (die
->sect_off
),
20592 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
20596 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
20598 if (attr_form_is_ref (attr
))
20599 return (sect_offset
) DW_UNSND (attr
);
20601 complaint (&symfile_complaints
,
20602 _("unsupported die ref attribute form: '%s'"),
20603 dwarf_form_name (attr
->form
));
20607 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
20608 * the value held by the attribute is not constant. */
20611 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
20613 if (attr
->form
== DW_FORM_sdata
|| attr
->form
== DW_FORM_implicit_const
)
20614 return DW_SND (attr
);
20615 else if (attr
->form
== DW_FORM_udata
20616 || attr
->form
== DW_FORM_data1
20617 || attr
->form
== DW_FORM_data2
20618 || attr
->form
== DW_FORM_data4
20619 || attr
->form
== DW_FORM_data8
)
20620 return DW_UNSND (attr
);
20623 /* For DW_FORM_data16 see attr_form_is_constant. */
20624 complaint (&symfile_complaints
,
20625 _("Attribute value is not a constant (%s)"),
20626 dwarf_form_name (attr
->form
));
20627 return default_value
;
20631 /* Follow reference or signature attribute ATTR of SRC_DIE.
20632 On entry *REF_CU is the CU of SRC_DIE.
20633 On exit *REF_CU is the CU of the result. */
20635 static struct die_info
*
20636 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
20637 struct dwarf2_cu
**ref_cu
)
20639 struct die_info
*die
;
20641 if (attr_form_is_ref (attr
))
20642 die
= follow_die_ref (src_die
, attr
, ref_cu
);
20643 else if (attr
->form
== DW_FORM_ref_sig8
)
20644 die
= follow_die_sig (src_die
, attr
, ref_cu
);
20647 dump_die_for_error (src_die
);
20648 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
20649 objfile_name ((*ref_cu
)->objfile
));
20655 /* Follow reference OFFSET.
20656 On entry *REF_CU is the CU of the source die referencing OFFSET.
20657 On exit *REF_CU is the CU of the result.
20658 Returns NULL if OFFSET is invalid. */
20660 static struct die_info
*
20661 follow_die_offset (sect_offset sect_off
, int offset_in_dwz
,
20662 struct dwarf2_cu
**ref_cu
)
20664 struct die_info temp_die
;
20665 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
20667 gdb_assert (cu
->per_cu
!= NULL
);
20671 if (cu
->per_cu
->is_debug_types
)
20673 /* .debug_types CUs cannot reference anything outside their CU.
20674 If they need to, they have to reference a signatured type via
20675 DW_FORM_ref_sig8. */
20676 if (!offset_in_cu_p (&cu
->header
, sect_off
))
20679 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
20680 || !offset_in_cu_p (&cu
->header
, sect_off
))
20682 struct dwarf2_per_cu_data
*per_cu
;
20684 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
20687 /* If necessary, add it to the queue and load its DIEs. */
20688 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
20689 load_full_comp_unit (per_cu
, cu
->language
);
20691 target_cu
= per_cu
->cu
;
20693 else if (cu
->dies
== NULL
)
20695 /* We're loading full DIEs during partial symbol reading. */
20696 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
20697 load_full_comp_unit (cu
->per_cu
, language_minimal
);
20700 *ref_cu
= target_cu
;
20701 temp_die
.sect_off
= sect_off
;
20702 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
20704 to_underlying (sect_off
));
20707 /* Follow reference attribute ATTR of SRC_DIE.
20708 On entry *REF_CU is the CU of SRC_DIE.
20709 On exit *REF_CU is the CU of the result. */
20711 static struct die_info
*
20712 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
20713 struct dwarf2_cu
**ref_cu
)
20715 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
20716 struct dwarf2_cu
*cu
= *ref_cu
;
20717 struct die_info
*die
;
20719 die
= follow_die_offset (sect_off
,
20720 (attr
->form
== DW_FORM_GNU_ref_alt
20721 || cu
->per_cu
->is_dwz
),
20724 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
20725 "at 0x%x [in module %s]"),
20726 to_underlying (sect_off
), to_underlying (src_die
->sect_off
),
20727 objfile_name (cu
->objfile
));
20732 /* Return DWARF block referenced by DW_AT_location of DIE at SECT_OFF at PER_CU.
20733 Returned value is intended for DW_OP_call*. Returned
20734 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
20736 struct dwarf2_locexpr_baton
20737 dwarf2_fetch_die_loc_sect_off (sect_offset sect_off
,
20738 struct dwarf2_per_cu_data
*per_cu
,
20739 CORE_ADDR (*get_frame_pc
) (void *baton
),
20742 struct dwarf2_cu
*cu
;
20743 struct die_info
*die
;
20744 struct attribute
*attr
;
20745 struct dwarf2_locexpr_baton retval
;
20747 dw2_setup (per_cu
->objfile
);
20749 if (per_cu
->cu
== NULL
)
20754 /* We shouldn't get here for a dummy CU, but don't crash on the user.
20755 Instead just throw an error, not much else we can do. */
20756 error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"),
20757 to_underlying (sect_off
), objfile_name (per_cu
->objfile
));
20760 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
20762 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
20763 to_underlying (sect_off
), objfile_name (per_cu
->objfile
));
20765 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
20768 /* DWARF: "If there is no such attribute, then there is no effect.".
20769 DATA is ignored if SIZE is 0. */
20771 retval
.data
= NULL
;
20774 else if (attr_form_is_section_offset (attr
))
20776 struct dwarf2_loclist_baton loclist_baton
;
20777 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
20780 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
20782 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
20784 retval
.size
= size
;
20788 if (!attr_form_is_block (attr
))
20789 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
20790 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
20791 to_underlying (sect_off
), objfile_name (per_cu
->objfile
));
20793 retval
.data
= DW_BLOCK (attr
)->data
;
20794 retval
.size
= DW_BLOCK (attr
)->size
;
20796 retval
.per_cu
= cu
->per_cu
;
20798 age_cached_comp_units ();
20803 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
20806 struct dwarf2_locexpr_baton
20807 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
20808 struct dwarf2_per_cu_data
*per_cu
,
20809 CORE_ADDR (*get_frame_pc
) (void *baton
),
20812 sect_offset sect_off
= per_cu
->sect_off
+ to_underlying (offset_in_cu
);
20814 return dwarf2_fetch_die_loc_sect_off (sect_off
, per_cu
, get_frame_pc
, baton
);
20817 /* Write a constant of a given type as target-ordered bytes into
20820 static const gdb_byte
*
20821 write_constant_as_bytes (struct obstack
*obstack
,
20822 enum bfd_endian byte_order
,
20829 *len
= TYPE_LENGTH (type
);
20830 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
20831 store_unsigned_integer (result
, *len
, byte_order
, value
);
20836 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
20837 pointer to the constant bytes and set LEN to the length of the
20838 data. If memory is needed, allocate it on OBSTACK. If the DIE
20839 does not have a DW_AT_const_value, return NULL. */
20842 dwarf2_fetch_constant_bytes (sect_offset sect_off
,
20843 struct dwarf2_per_cu_data
*per_cu
,
20844 struct obstack
*obstack
,
20847 struct dwarf2_cu
*cu
;
20848 struct die_info
*die
;
20849 struct attribute
*attr
;
20850 const gdb_byte
*result
= NULL
;
20853 enum bfd_endian byte_order
;
20855 dw2_setup (per_cu
->objfile
);
20857 if (per_cu
->cu
== NULL
)
20862 /* We shouldn't get here for a dummy CU, but don't crash on the user.
20863 Instead just throw an error, not much else we can do. */
20864 error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"),
20865 to_underlying (sect_off
), objfile_name (per_cu
->objfile
));
20868 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
20870 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
20871 to_underlying (sect_off
), objfile_name (per_cu
->objfile
));
20874 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20878 byte_order
= (bfd_big_endian (per_cu
->objfile
->obfd
)
20879 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
20881 switch (attr
->form
)
20884 case DW_FORM_GNU_addr_index
:
20888 *len
= cu
->header
.addr_size
;
20889 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
20890 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
20894 case DW_FORM_string
:
20896 case DW_FORM_GNU_str_index
:
20897 case DW_FORM_GNU_strp_alt
:
20898 /* DW_STRING is already allocated on the objfile obstack, point
20900 result
= (const gdb_byte
*) DW_STRING (attr
);
20901 *len
= strlen (DW_STRING (attr
));
20903 case DW_FORM_block1
:
20904 case DW_FORM_block2
:
20905 case DW_FORM_block4
:
20906 case DW_FORM_block
:
20907 case DW_FORM_exprloc
:
20908 case DW_FORM_data16
:
20909 result
= DW_BLOCK (attr
)->data
;
20910 *len
= DW_BLOCK (attr
)->size
;
20913 /* The DW_AT_const_value attributes are supposed to carry the
20914 symbol's value "represented as it would be on the target
20915 architecture." By the time we get here, it's already been
20916 converted to host endianness, so we just need to sign- or
20917 zero-extend it as appropriate. */
20918 case DW_FORM_data1
:
20919 type
= die_type (die
, cu
);
20920 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
20921 if (result
== NULL
)
20922 result
= write_constant_as_bytes (obstack
, byte_order
,
20925 case DW_FORM_data2
:
20926 type
= die_type (die
, cu
);
20927 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
20928 if (result
== NULL
)
20929 result
= write_constant_as_bytes (obstack
, byte_order
,
20932 case DW_FORM_data4
:
20933 type
= die_type (die
, cu
);
20934 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
20935 if (result
== NULL
)
20936 result
= write_constant_as_bytes (obstack
, byte_order
,
20939 case DW_FORM_data8
:
20940 type
= die_type (die
, cu
);
20941 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
20942 if (result
== NULL
)
20943 result
= write_constant_as_bytes (obstack
, byte_order
,
20947 case DW_FORM_sdata
:
20948 case DW_FORM_implicit_const
:
20949 type
= die_type (die
, cu
);
20950 result
= write_constant_as_bytes (obstack
, byte_order
,
20951 type
, DW_SND (attr
), len
);
20954 case DW_FORM_udata
:
20955 type
= die_type (die
, cu
);
20956 result
= write_constant_as_bytes (obstack
, byte_order
,
20957 type
, DW_UNSND (attr
), len
);
20961 complaint (&symfile_complaints
,
20962 _("unsupported const value attribute form: '%s'"),
20963 dwarf_form_name (attr
->form
));
20970 /* Return the type of the die at OFFSET in PER_CU. Return NULL if no
20971 valid type for this die is found. */
20974 dwarf2_fetch_die_type_sect_off (sect_offset sect_off
,
20975 struct dwarf2_per_cu_data
*per_cu
)
20977 struct dwarf2_cu
*cu
;
20978 struct die_info
*die
;
20980 dw2_setup (per_cu
->objfile
);
20982 if (per_cu
->cu
== NULL
)
20988 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
20992 return die_type (die
, cu
);
20995 /* Return the type of the DIE at DIE_OFFSET in the CU named by
20999 dwarf2_get_die_type (cu_offset die_offset
,
21000 struct dwarf2_per_cu_data
*per_cu
)
21002 dw2_setup (per_cu
->objfile
);
21004 sect_offset die_offset_sect
= per_cu
->sect_off
+ to_underlying (die_offset
);
21005 return get_die_type_at_offset (die_offset_sect
, per_cu
);
21008 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
21009 On entry *REF_CU is the CU of SRC_DIE.
21010 On exit *REF_CU is the CU of the result.
21011 Returns NULL if the referenced DIE isn't found. */
21013 static struct die_info
*
21014 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
21015 struct dwarf2_cu
**ref_cu
)
21017 struct die_info temp_die
;
21018 struct dwarf2_cu
*sig_cu
;
21019 struct die_info
*die
;
21021 /* While it might be nice to assert sig_type->type == NULL here,
21022 we can get here for DW_AT_imported_declaration where we need
21023 the DIE not the type. */
21025 /* If necessary, add it to the queue and load its DIEs. */
21027 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
21028 read_signatured_type (sig_type
);
21030 sig_cu
= sig_type
->per_cu
.cu
;
21031 gdb_assert (sig_cu
!= NULL
);
21032 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
21033 temp_die
.sect_off
= sig_type
->type_offset_in_section
;
21034 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
21035 to_underlying (temp_die
.sect_off
));
21038 /* For .gdb_index version 7 keep track of included TUs.
21039 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
21040 if (dwarf2_per_objfile
->index_table
!= NULL
21041 && dwarf2_per_objfile
->index_table
->version
<= 7)
21043 VEC_safe_push (dwarf2_per_cu_ptr
,
21044 (*ref_cu
)->per_cu
->imported_symtabs
,
21055 /* Follow signatured type referenced by ATTR in SRC_DIE.
21056 On entry *REF_CU is the CU of SRC_DIE.
21057 On exit *REF_CU is the CU of the result.
21058 The result is the DIE of the type.
21059 If the referenced type cannot be found an error is thrown. */
21061 static struct die_info
*
21062 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
21063 struct dwarf2_cu
**ref_cu
)
21065 ULONGEST signature
= DW_SIGNATURE (attr
);
21066 struct signatured_type
*sig_type
;
21067 struct die_info
*die
;
21069 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
21071 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
21072 /* sig_type will be NULL if the signatured type is missing from
21074 if (sig_type
== NULL
)
21076 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
21077 " from DIE at 0x%x [in module %s]"),
21078 hex_string (signature
), to_underlying (src_die
->sect_off
),
21079 objfile_name ((*ref_cu
)->objfile
));
21082 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
21085 dump_die_for_error (src_die
);
21086 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
21087 " from DIE at 0x%x [in module %s]"),
21088 hex_string (signature
), to_underlying (src_die
->sect_off
),
21089 objfile_name ((*ref_cu
)->objfile
));
21095 /* Get the type specified by SIGNATURE referenced in DIE/CU,
21096 reading in and processing the type unit if necessary. */
21098 static struct type
*
21099 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
21100 struct dwarf2_cu
*cu
)
21102 struct signatured_type
*sig_type
;
21103 struct dwarf2_cu
*type_cu
;
21104 struct die_info
*type_die
;
21107 sig_type
= lookup_signatured_type (cu
, signature
);
21108 /* sig_type will be NULL if the signatured type is missing from
21110 if (sig_type
== NULL
)
21112 complaint (&symfile_complaints
,
21113 _("Dwarf Error: Cannot find signatured DIE %s referenced"
21114 " from DIE at 0x%x [in module %s]"),
21115 hex_string (signature
), to_underlying (die
->sect_off
),
21116 objfile_name (dwarf2_per_objfile
->objfile
));
21117 return build_error_marker_type (cu
, die
);
21120 /* If we already know the type we're done. */
21121 if (sig_type
->type
!= NULL
)
21122 return sig_type
->type
;
21125 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
21126 if (type_die
!= NULL
)
21128 /* N.B. We need to call get_die_type to ensure only one type for this DIE
21129 is created. This is important, for example, because for c++ classes
21130 we need TYPE_NAME set which is only done by new_symbol. Blech. */
21131 type
= read_type_die (type_die
, type_cu
);
21134 complaint (&symfile_complaints
,
21135 _("Dwarf Error: Cannot build signatured type %s"
21136 " referenced from DIE at 0x%x [in module %s]"),
21137 hex_string (signature
), to_underlying (die
->sect_off
),
21138 objfile_name (dwarf2_per_objfile
->objfile
));
21139 type
= build_error_marker_type (cu
, die
);
21144 complaint (&symfile_complaints
,
21145 _("Dwarf Error: Problem reading signatured DIE %s referenced"
21146 " from DIE at 0x%x [in module %s]"),
21147 hex_string (signature
), to_underlying (die
->sect_off
),
21148 objfile_name (dwarf2_per_objfile
->objfile
));
21149 type
= build_error_marker_type (cu
, die
);
21151 sig_type
->type
= type
;
21156 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
21157 reading in and processing the type unit if necessary. */
21159 static struct type
*
21160 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
21161 struct dwarf2_cu
*cu
) /* ARI: editCase function */
21163 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
21164 if (attr_form_is_ref (attr
))
21166 struct dwarf2_cu
*type_cu
= cu
;
21167 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
21169 return read_type_die (type_die
, type_cu
);
21171 else if (attr
->form
== DW_FORM_ref_sig8
)
21173 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
21177 complaint (&symfile_complaints
,
21178 _("Dwarf Error: DW_AT_signature has bad form %s in DIE"
21179 " at 0x%x [in module %s]"),
21180 dwarf_form_name (attr
->form
), to_underlying (die
->sect_off
),
21181 objfile_name (dwarf2_per_objfile
->objfile
));
21182 return build_error_marker_type (cu
, die
);
21186 /* Load the DIEs associated with type unit PER_CU into memory. */
21189 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
21191 struct signatured_type
*sig_type
;
21193 /* Caller is responsible for ensuring type_unit_groups don't get here. */
21194 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
21196 /* We have the per_cu, but we need the signatured_type.
21197 Fortunately this is an easy translation. */
21198 gdb_assert (per_cu
->is_debug_types
);
21199 sig_type
= (struct signatured_type
*) per_cu
;
21201 gdb_assert (per_cu
->cu
== NULL
);
21203 read_signatured_type (sig_type
);
21205 gdb_assert (per_cu
->cu
!= NULL
);
21208 /* die_reader_func for read_signatured_type.
21209 This is identical to load_full_comp_unit_reader,
21210 but is kept separate for now. */
21213 read_signatured_type_reader (const struct die_reader_specs
*reader
,
21214 const gdb_byte
*info_ptr
,
21215 struct die_info
*comp_unit_die
,
21219 struct dwarf2_cu
*cu
= reader
->cu
;
21221 gdb_assert (cu
->die_hash
== NULL
);
21223 htab_create_alloc_ex (cu
->header
.length
/ 12,
21227 &cu
->comp_unit_obstack
,
21228 hashtab_obstack_allocate
,
21229 dummy_obstack_deallocate
);
21232 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
21233 &info_ptr
, comp_unit_die
);
21234 cu
->dies
= comp_unit_die
;
21235 /* comp_unit_die is not stored in die_hash, no need. */
21237 /* We try not to read any attributes in this function, because not
21238 all CUs needed for references have been loaded yet, and symbol
21239 table processing isn't initialized. But we have to set the CU language,
21240 or we won't be able to build types correctly.
21241 Similarly, if we do not read the producer, we can not apply
21242 producer-specific interpretation. */
21243 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
21246 /* Read in a signatured type and build its CU and DIEs.
21247 If the type is a stub for the real type in a DWO file,
21248 read in the real type from the DWO file as well. */
21251 read_signatured_type (struct signatured_type
*sig_type
)
21253 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
21255 gdb_assert (per_cu
->is_debug_types
);
21256 gdb_assert (per_cu
->cu
== NULL
);
21258 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
21259 read_signatured_type_reader
, NULL
);
21260 sig_type
->per_cu
.tu_read
= 1;
21263 /* Decode simple location descriptions.
21264 Given a pointer to a dwarf block that defines a location, compute
21265 the location and return the value.
21267 NOTE drow/2003-11-18: This function is called in two situations
21268 now: for the address of static or global variables (partial symbols
21269 only) and for offsets into structures which are expected to be
21270 (more or less) constant. The partial symbol case should go away,
21271 and only the constant case should remain. That will let this
21272 function complain more accurately. A few special modes are allowed
21273 without complaint for global variables (for instance, global
21274 register values and thread-local values).
21276 A location description containing no operations indicates that the
21277 object is optimized out. The return value is 0 for that case.
21278 FIXME drow/2003-11-16: No callers check for this case any more; soon all
21279 callers will only want a very basic result and this can become a
21282 Note that stack[0] is unused except as a default error return. */
21285 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
21287 struct objfile
*objfile
= cu
->objfile
;
21289 size_t size
= blk
->size
;
21290 const gdb_byte
*data
= blk
->data
;
21291 CORE_ADDR stack
[64];
21293 unsigned int bytes_read
, unsnd
;
21299 stack
[++stacki
] = 0;
21338 stack
[++stacki
] = op
- DW_OP_lit0
;
21373 stack
[++stacki
] = op
- DW_OP_reg0
;
21375 dwarf2_complex_location_expr_complaint ();
21379 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
21381 stack
[++stacki
] = unsnd
;
21383 dwarf2_complex_location_expr_complaint ();
21387 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
21392 case DW_OP_const1u
:
21393 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
21397 case DW_OP_const1s
:
21398 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
21402 case DW_OP_const2u
:
21403 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
21407 case DW_OP_const2s
:
21408 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
21412 case DW_OP_const4u
:
21413 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
21417 case DW_OP_const4s
:
21418 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
21422 case DW_OP_const8u
:
21423 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
21428 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
21434 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
21439 stack
[stacki
+ 1] = stack
[stacki
];
21444 stack
[stacki
- 1] += stack
[stacki
];
21448 case DW_OP_plus_uconst
:
21449 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
21455 stack
[stacki
- 1] -= stack
[stacki
];
21460 /* If we're not the last op, then we definitely can't encode
21461 this using GDB's address_class enum. This is valid for partial
21462 global symbols, although the variable's address will be bogus
21465 dwarf2_complex_location_expr_complaint ();
21468 case DW_OP_GNU_push_tls_address
:
21469 case DW_OP_form_tls_address
:
21470 /* The top of the stack has the offset from the beginning
21471 of the thread control block at which the variable is located. */
21472 /* Nothing should follow this operator, so the top of stack would
21474 /* This is valid for partial global symbols, but the variable's
21475 address will be bogus in the psymtab. Make it always at least
21476 non-zero to not look as a variable garbage collected by linker
21477 which have DW_OP_addr 0. */
21479 dwarf2_complex_location_expr_complaint ();
21483 case DW_OP_GNU_uninit
:
21486 case DW_OP_GNU_addr_index
:
21487 case DW_OP_GNU_const_index
:
21488 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
21495 const char *name
= get_DW_OP_name (op
);
21498 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
21501 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
21505 return (stack
[stacki
]);
21508 /* Enforce maximum stack depth of SIZE-1 to avoid writing
21509 outside of the allocated space. Also enforce minimum>0. */
21510 if (stacki
>= ARRAY_SIZE (stack
) - 1)
21512 complaint (&symfile_complaints
,
21513 _("location description stack overflow"));
21519 complaint (&symfile_complaints
,
21520 _("location description stack underflow"));
21524 return (stack
[stacki
]);
21527 /* memory allocation interface */
21529 static struct dwarf_block
*
21530 dwarf_alloc_block (struct dwarf2_cu
*cu
)
21532 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
21535 static struct die_info
*
21536 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
21538 struct die_info
*die
;
21539 size_t size
= sizeof (struct die_info
);
21542 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
21544 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
21545 memset (die
, 0, sizeof (struct die_info
));
21550 /* Macro support. */
21552 /* Return file name relative to the compilation directory of file number I in
21553 *LH's file name table. The result is allocated using xmalloc; the caller is
21554 responsible for freeing it. */
21557 file_file_name (int file
, struct line_header
*lh
)
21559 /* Is the file number a valid index into the line header's file name
21560 table? Remember that file numbers start with one, not zero. */
21561 if (1 <= file
&& file
<= lh
->file_names
.size ())
21563 const file_entry
&fe
= lh
->file_names
[file
- 1];
21565 if (!IS_ABSOLUTE_PATH (fe
.name
))
21567 const char *dir
= fe
.include_dir (lh
);
21569 return concat (dir
, SLASH_STRING
, fe
.name
, (char *) NULL
);
21571 return xstrdup (fe
.name
);
21575 /* The compiler produced a bogus file number. We can at least
21576 record the macro definitions made in the file, even if we
21577 won't be able to find the file by name. */
21578 char fake_name
[80];
21580 xsnprintf (fake_name
, sizeof (fake_name
),
21581 "<bad macro file number %d>", file
);
21583 complaint (&symfile_complaints
,
21584 _("bad file number in macro information (%d)"),
21587 return xstrdup (fake_name
);
21591 /* Return the full name of file number I in *LH's file name table.
21592 Use COMP_DIR as the name of the current directory of the
21593 compilation. The result is allocated using xmalloc; the caller is
21594 responsible for freeing it. */
21596 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
21598 /* Is the file number a valid index into the line header's file name
21599 table? Remember that file numbers start with one, not zero. */
21600 if (1 <= file
&& file
<= lh
->file_names
.size ())
21602 char *relative
= file_file_name (file
, lh
);
21604 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
21606 return reconcat (relative
, comp_dir
, SLASH_STRING
,
21607 relative
, (char *) NULL
);
21610 return file_file_name (file
, lh
);
21614 static struct macro_source_file
*
21615 macro_start_file (int file
, int line
,
21616 struct macro_source_file
*current_file
,
21617 struct line_header
*lh
)
21619 /* File name relative to the compilation directory of this source file. */
21620 char *file_name
= file_file_name (file
, lh
);
21622 if (! current_file
)
21624 /* Note: We don't create a macro table for this compilation unit
21625 at all until we actually get a filename. */
21626 struct macro_table
*macro_table
= get_macro_table ();
21628 /* If we have no current file, then this must be the start_file
21629 directive for the compilation unit's main source file. */
21630 current_file
= macro_set_main (macro_table
, file_name
);
21631 macro_define_special (macro_table
);
21634 current_file
= macro_include (current_file
, line
, file_name
);
21638 return current_file
;
21641 static const char *
21642 consume_improper_spaces (const char *p
, const char *body
)
21646 complaint (&symfile_complaints
,
21647 _("macro definition contains spaces "
21648 "in formal argument list:\n`%s'"),
21660 parse_macro_definition (struct macro_source_file
*file
, int line
,
21665 /* The body string takes one of two forms. For object-like macro
21666 definitions, it should be:
21668 <macro name> " " <definition>
21670 For function-like macro definitions, it should be:
21672 <macro name> "() " <definition>
21674 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
21676 Spaces may appear only where explicitly indicated, and in the
21679 The Dwarf 2 spec says that an object-like macro's name is always
21680 followed by a space, but versions of GCC around March 2002 omit
21681 the space when the macro's definition is the empty string.
21683 The Dwarf 2 spec says that there should be no spaces between the
21684 formal arguments in a function-like macro's formal argument list,
21685 but versions of GCC around March 2002 include spaces after the
21689 /* Find the extent of the macro name. The macro name is terminated
21690 by either a space or null character (for an object-like macro) or
21691 an opening paren (for a function-like macro). */
21692 for (p
= body
; *p
; p
++)
21693 if (*p
== ' ' || *p
== '(')
21696 if (*p
== ' ' || *p
== '\0')
21698 /* It's an object-like macro. */
21699 int name_len
= p
- body
;
21700 char *name
= savestring (body
, name_len
);
21701 const char *replacement
;
21704 replacement
= body
+ name_len
+ 1;
21707 dwarf2_macro_malformed_definition_complaint (body
);
21708 replacement
= body
+ name_len
;
21711 macro_define_object (file
, line
, name
, replacement
);
21715 else if (*p
== '(')
21717 /* It's a function-like macro. */
21718 char *name
= savestring (body
, p
- body
);
21721 char **argv
= XNEWVEC (char *, argv_size
);
21725 p
= consume_improper_spaces (p
, body
);
21727 /* Parse the formal argument list. */
21728 while (*p
&& *p
!= ')')
21730 /* Find the extent of the current argument name. */
21731 const char *arg_start
= p
;
21733 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
21736 if (! *p
|| p
== arg_start
)
21737 dwarf2_macro_malformed_definition_complaint (body
);
21740 /* Make sure argv has room for the new argument. */
21741 if (argc
>= argv_size
)
21744 argv
= XRESIZEVEC (char *, argv
, argv_size
);
21747 argv
[argc
++] = savestring (arg_start
, p
- arg_start
);
21750 p
= consume_improper_spaces (p
, body
);
21752 /* Consume the comma, if present. */
21757 p
= consume_improper_spaces (p
, body
);
21766 /* Perfectly formed definition, no complaints. */
21767 macro_define_function (file
, line
, name
,
21768 argc
, (const char **) argv
,
21770 else if (*p
== '\0')
21772 /* Complain, but do define it. */
21773 dwarf2_macro_malformed_definition_complaint (body
);
21774 macro_define_function (file
, line
, name
,
21775 argc
, (const char **) argv
,
21779 /* Just complain. */
21780 dwarf2_macro_malformed_definition_complaint (body
);
21783 /* Just complain. */
21784 dwarf2_macro_malformed_definition_complaint (body
);
21790 for (i
= 0; i
< argc
; i
++)
21796 dwarf2_macro_malformed_definition_complaint (body
);
21799 /* Skip some bytes from BYTES according to the form given in FORM.
21800 Returns the new pointer. */
21802 static const gdb_byte
*
21803 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
21804 enum dwarf_form form
,
21805 unsigned int offset_size
,
21806 struct dwarf2_section_info
*section
)
21808 unsigned int bytes_read
;
21812 case DW_FORM_data1
:
21817 case DW_FORM_data2
:
21821 case DW_FORM_data4
:
21825 case DW_FORM_data8
:
21829 case DW_FORM_data16
:
21833 case DW_FORM_string
:
21834 read_direct_string (abfd
, bytes
, &bytes_read
);
21835 bytes
+= bytes_read
;
21838 case DW_FORM_sec_offset
:
21840 case DW_FORM_GNU_strp_alt
:
21841 bytes
+= offset_size
;
21844 case DW_FORM_block
:
21845 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
21846 bytes
+= bytes_read
;
21849 case DW_FORM_block1
:
21850 bytes
+= 1 + read_1_byte (abfd
, bytes
);
21852 case DW_FORM_block2
:
21853 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
21855 case DW_FORM_block4
:
21856 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
21859 case DW_FORM_sdata
:
21860 case DW_FORM_udata
:
21861 case DW_FORM_GNU_addr_index
:
21862 case DW_FORM_GNU_str_index
:
21863 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
21866 dwarf2_section_buffer_overflow_complaint (section
);
21871 case DW_FORM_implicit_const
:
21877 complaint (&symfile_complaints
,
21878 _("invalid form 0x%x in `%s'"),
21879 form
, get_section_name (section
));
21887 /* A helper for dwarf_decode_macros that handles skipping an unknown
21888 opcode. Returns an updated pointer to the macro data buffer; or,
21889 on error, issues a complaint and returns NULL. */
21891 static const gdb_byte
*
21892 skip_unknown_opcode (unsigned int opcode
,
21893 const gdb_byte
**opcode_definitions
,
21894 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
21896 unsigned int offset_size
,
21897 struct dwarf2_section_info
*section
)
21899 unsigned int bytes_read
, i
;
21901 const gdb_byte
*defn
;
21903 if (opcode_definitions
[opcode
] == NULL
)
21905 complaint (&symfile_complaints
,
21906 _("unrecognized DW_MACFINO opcode 0x%x"),
21911 defn
= opcode_definitions
[opcode
];
21912 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
21913 defn
+= bytes_read
;
21915 for (i
= 0; i
< arg
; ++i
)
21917 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
,
21918 (enum dwarf_form
) defn
[i
], offset_size
,
21920 if (mac_ptr
== NULL
)
21922 /* skip_form_bytes already issued the complaint. */
21930 /* A helper function which parses the header of a macro section.
21931 If the macro section is the extended (for now called "GNU") type,
21932 then this updates *OFFSET_SIZE. Returns a pointer to just after
21933 the header, or issues a complaint and returns NULL on error. */
21935 static const gdb_byte
*
21936 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
21938 const gdb_byte
*mac_ptr
,
21939 unsigned int *offset_size
,
21940 int section_is_gnu
)
21942 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
21944 if (section_is_gnu
)
21946 unsigned int version
, flags
;
21948 version
= read_2_bytes (abfd
, mac_ptr
);
21949 if (version
!= 4 && version
!= 5)
21951 complaint (&symfile_complaints
,
21952 _("unrecognized version `%d' in .debug_macro section"),
21958 flags
= read_1_byte (abfd
, mac_ptr
);
21960 *offset_size
= (flags
& 1) ? 8 : 4;
21962 if ((flags
& 2) != 0)
21963 /* We don't need the line table offset. */
21964 mac_ptr
+= *offset_size
;
21966 /* Vendor opcode descriptions. */
21967 if ((flags
& 4) != 0)
21969 unsigned int i
, count
;
21971 count
= read_1_byte (abfd
, mac_ptr
);
21973 for (i
= 0; i
< count
; ++i
)
21975 unsigned int opcode
, bytes_read
;
21978 opcode
= read_1_byte (abfd
, mac_ptr
);
21980 opcode_definitions
[opcode
] = mac_ptr
;
21981 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21982 mac_ptr
+= bytes_read
;
21991 /* A helper for dwarf_decode_macros that handles the GNU extensions,
21992 including DW_MACRO_import. */
21995 dwarf_decode_macro_bytes (bfd
*abfd
,
21996 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
21997 struct macro_source_file
*current_file
,
21998 struct line_header
*lh
,
21999 struct dwarf2_section_info
*section
,
22000 int section_is_gnu
, int section_is_dwz
,
22001 unsigned int offset_size
,
22002 htab_t include_hash
)
22004 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22005 enum dwarf_macro_record_type macinfo_type
;
22006 int at_commandline
;
22007 const gdb_byte
*opcode_definitions
[256];
22009 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
22010 &offset_size
, section_is_gnu
);
22011 if (mac_ptr
== NULL
)
22013 /* We already issued a complaint. */
22017 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
22018 GDB is still reading the definitions from command line. First
22019 DW_MACINFO_start_file will need to be ignored as it was already executed
22020 to create CURRENT_FILE for the main source holding also the command line
22021 definitions. On first met DW_MACINFO_start_file this flag is reset to
22022 normally execute all the remaining DW_MACINFO_start_file macinfos. */
22024 at_commandline
= 1;
22028 /* Do we at least have room for a macinfo type byte? */
22029 if (mac_ptr
>= mac_end
)
22031 dwarf2_section_buffer_overflow_complaint (section
);
22035 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
22038 /* Note that we rely on the fact that the corresponding GNU and
22039 DWARF constants are the same. */
22040 switch (macinfo_type
)
22042 /* A zero macinfo type indicates the end of the macro
22047 case DW_MACRO_define
:
22048 case DW_MACRO_undef
:
22049 case DW_MACRO_define_strp
:
22050 case DW_MACRO_undef_strp
:
22051 case DW_MACRO_define_sup
:
22052 case DW_MACRO_undef_sup
:
22054 unsigned int bytes_read
;
22059 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22060 mac_ptr
+= bytes_read
;
22062 if (macinfo_type
== DW_MACRO_define
22063 || macinfo_type
== DW_MACRO_undef
)
22065 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
22066 mac_ptr
+= bytes_read
;
22070 LONGEST str_offset
;
22072 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
22073 mac_ptr
+= offset_size
;
22075 if (macinfo_type
== DW_MACRO_define_sup
22076 || macinfo_type
== DW_MACRO_undef_sup
22079 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
22081 body
= read_indirect_string_from_dwz (dwz
, str_offset
);
22084 body
= read_indirect_string_at_offset (abfd
, str_offset
);
22087 is_define
= (macinfo_type
== DW_MACRO_define
22088 || macinfo_type
== DW_MACRO_define_strp
22089 || macinfo_type
== DW_MACRO_define_sup
);
22090 if (! current_file
)
22092 /* DWARF violation as no main source is present. */
22093 complaint (&symfile_complaints
,
22094 _("debug info with no main source gives macro %s "
22096 is_define
? _("definition") : _("undefinition"),
22100 if ((line
== 0 && !at_commandline
)
22101 || (line
!= 0 && at_commandline
))
22102 complaint (&symfile_complaints
,
22103 _("debug info gives %s macro %s with %s line %d: %s"),
22104 at_commandline
? _("command-line") : _("in-file"),
22105 is_define
? _("definition") : _("undefinition"),
22106 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
22109 parse_macro_definition (current_file
, line
, body
);
22112 gdb_assert (macinfo_type
== DW_MACRO_undef
22113 || macinfo_type
== DW_MACRO_undef_strp
22114 || macinfo_type
== DW_MACRO_undef_sup
);
22115 macro_undef (current_file
, line
, body
);
22120 case DW_MACRO_start_file
:
22122 unsigned int bytes_read
;
22125 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22126 mac_ptr
+= bytes_read
;
22127 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22128 mac_ptr
+= bytes_read
;
22130 if ((line
== 0 && !at_commandline
)
22131 || (line
!= 0 && at_commandline
))
22132 complaint (&symfile_complaints
,
22133 _("debug info gives source %d included "
22134 "from %s at %s line %d"),
22135 file
, at_commandline
? _("command-line") : _("file"),
22136 line
== 0 ? _("zero") : _("non-zero"), line
);
22138 if (at_commandline
)
22140 /* This DW_MACRO_start_file was executed in the
22142 at_commandline
= 0;
22145 current_file
= macro_start_file (file
, line
, current_file
, lh
);
22149 case DW_MACRO_end_file
:
22150 if (! current_file
)
22151 complaint (&symfile_complaints
,
22152 _("macro debug info has an unmatched "
22153 "`close_file' directive"));
22156 current_file
= current_file
->included_by
;
22157 if (! current_file
)
22159 enum dwarf_macro_record_type next_type
;
22161 /* GCC circa March 2002 doesn't produce the zero
22162 type byte marking the end of the compilation
22163 unit. Complain if it's not there, but exit no
22166 /* Do we at least have room for a macinfo type byte? */
22167 if (mac_ptr
>= mac_end
)
22169 dwarf2_section_buffer_overflow_complaint (section
);
22173 /* We don't increment mac_ptr here, so this is just
22176 = (enum dwarf_macro_record_type
) read_1_byte (abfd
,
22178 if (next_type
!= 0)
22179 complaint (&symfile_complaints
,
22180 _("no terminating 0-type entry for "
22181 "macros in `.debug_macinfo' section"));
22188 case DW_MACRO_import
:
22189 case DW_MACRO_import_sup
:
22193 bfd
*include_bfd
= abfd
;
22194 struct dwarf2_section_info
*include_section
= section
;
22195 const gdb_byte
*include_mac_end
= mac_end
;
22196 int is_dwz
= section_is_dwz
;
22197 const gdb_byte
*new_mac_ptr
;
22199 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
22200 mac_ptr
+= offset_size
;
22202 if (macinfo_type
== DW_MACRO_import_sup
)
22204 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
22206 dwarf2_read_section (objfile
, &dwz
->macro
);
22208 include_section
= &dwz
->macro
;
22209 include_bfd
= get_section_bfd_owner (include_section
);
22210 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
22214 new_mac_ptr
= include_section
->buffer
+ offset
;
22215 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
22219 /* This has actually happened; see
22220 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
22221 complaint (&symfile_complaints
,
22222 _("recursive DW_MACRO_import in "
22223 ".debug_macro section"));
22227 *slot
= (void *) new_mac_ptr
;
22229 dwarf_decode_macro_bytes (include_bfd
, new_mac_ptr
,
22230 include_mac_end
, current_file
, lh
,
22231 section
, section_is_gnu
, is_dwz
,
22232 offset_size
, include_hash
);
22234 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
22239 case DW_MACINFO_vendor_ext
:
22240 if (!section_is_gnu
)
22242 unsigned int bytes_read
;
22244 /* This reads the constant, but since we don't recognize
22245 any vendor extensions, we ignore it. */
22246 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22247 mac_ptr
+= bytes_read
;
22248 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
22249 mac_ptr
+= bytes_read
;
22251 /* We don't recognize any vendor extensions. */
22257 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
22258 mac_ptr
, mac_end
, abfd
, offset_size
,
22260 if (mac_ptr
== NULL
)
22264 } while (macinfo_type
!= 0);
22268 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
22269 int section_is_gnu
)
22271 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22272 struct line_header
*lh
= cu
->line_header
;
22274 const gdb_byte
*mac_ptr
, *mac_end
;
22275 struct macro_source_file
*current_file
= 0;
22276 enum dwarf_macro_record_type macinfo_type
;
22277 unsigned int offset_size
= cu
->header
.offset_size
;
22278 const gdb_byte
*opcode_definitions
[256];
22280 struct dwarf2_section_info
*section
;
22281 const char *section_name
;
22283 if (cu
->dwo_unit
!= NULL
)
22285 if (section_is_gnu
)
22287 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
22288 section_name
= ".debug_macro.dwo";
22292 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
22293 section_name
= ".debug_macinfo.dwo";
22298 if (section_is_gnu
)
22300 section
= &dwarf2_per_objfile
->macro
;
22301 section_name
= ".debug_macro";
22305 section
= &dwarf2_per_objfile
->macinfo
;
22306 section_name
= ".debug_macinfo";
22310 dwarf2_read_section (objfile
, section
);
22311 if (section
->buffer
== NULL
)
22313 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
22316 abfd
= get_section_bfd_owner (section
);
22318 /* First pass: Find the name of the base filename.
22319 This filename is needed in order to process all macros whose definition
22320 (or undefinition) comes from the command line. These macros are defined
22321 before the first DW_MACINFO_start_file entry, and yet still need to be
22322 associated to the base file.
22324 To determine the base file name, we scan the macro definitions until we
22325 reach the first DW_MACINFO_start_file entry. We then initialize
22326 CURRENT_FILE accordingly so that any macro definition found before the
22327 first DW_MACINFO_start_file can still be associated to the base file. */
22329 mac_ptr
= section
->buffer
+ offset
;
22330 mac_end
= section
->buffer
+ section
->size
;
22332 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
22333 &offset_size
, section_is_gnu
);
22334 if (mac_ptr
== NULL
)
22336 /* We already issued a complaint. */
22342 /* Do we at least have room for a macinfo type byte? */
22343 if (mac_ptr
>= mac_end
)
22345 /* Complaint is printed during the second pass as GDB will probably
22346 stop the first pass earlier upon finding
22347 DW_MACINFO_start_file. */
22351 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
22354 /* Note that we rely on the fact that the corresponding GNU and
22355 DWARF constants are the same. */
22356 switch (macinfo_type
)
22358 /* A zero macinfo type indicates the end of the macro
22363 case DW_MACRO_define
:
22364 case DW_MACRO_undef
:
22365 /* Only skip the data by MAC_PTR. */
22367 unsigned int bytes_read
;
22369 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22370 mac_ptr
+= bytes_read
;
22371 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
22372 mac_ptr
+= bytes_read
;
22376 case DW_MACRO_start_file
:
22378 unsigned int bytes_read
;
22381 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22382 mac_ptr
+= bytes_read
;
22383 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22384 mac_ptr
+= bytes_read
;
22386 current_file
= macro_start_file (file
, line
, current_file
, lh
);
22390 case DW_MACRO_end_file
:
22391 /* No data to skip by MAC_PTR. */
22394 case DW_MACRO_define_strp
:
22395 case DW_MACRO_undef_strp
:
22396 case DW_MACRO_define_sup
:
22397 case DW_MACRO_undef_sup
:
22399 unsigned int bytes_read
;
22401 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22402 mac_ptr
+= bytes_read
;
22403 mac_ptr
+= offset_size
;
22407 case DW_MACRO_import
:
22408 case DW_MACRO_import_sup
:
22409 /* Note that, according to the spec, a transparent include
22410 chain cannot call DW_MACRO_start_file. So, we can just
22411 skip this opcode. */
22412 mac_ptr
+= offset_size
;
22415 case DW_MACINFO_vendor_ext
:
22416 /* Only skip the data by MAC_PTR. */
22417 if (!section_is_gnu
)
22419 unsigned int bytes_read
;
22421 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22422 mac_ptr
+= bytes_read
;
22423 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
22424 mac_ptr
+= bytes_read
;
22429 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
22430 mac_ptr
, mac_end
, abfd
, offset_size
,
22432 if (mac_ptr
== NULL
)
22436 } while (macinfo_type
!= 0 && current_file
== NULL
);
22438 /* Second pass: Process all entries.
22440 Use the AT_COMMAND_LINE flag to determine whether we are still processing
22441 command-line macro definitions/undefinitions. This flag is unset when we
22442 reach the first DW_MACINFO_start_file entry. */
22444 htab_up
include_hash (htab_create_alloc (1, htab_hash_pointer
,
22446 NULL
, xcalloc
, xfree
));
22447 mac_ptr
= section
->buffer
+ offset
;
22448 slot
= htab_find_slot (include_hash
.get (), mac_ptr
, INSERT
);
22449 *slot
= (void *) mac_ptr
;
22450 dwarf_decode_macro_bytes (abfd
, mac_ptr
, mac_end
,
22451 current_file
, lh
, section
,
22452 section_is_gnu
, 0, offset_size
,
22453 include_hash
.get ());
22456 /* Check if the attribute's form is a DW_FORM_block*
22457 if so return true else false. */
22460 attr_form_is_block (const struct attribute
*attr
)
22462 return (attr
== NULL
? 0 :
22463 attr
->form
== DW_FORM_block1
22464 || attr
->form
== DW_FORM_block2
22465 || attr
->form
== DW_FORM_block4
22466 || attr
->form
== DW_FORM_block
22467 || attr
->form
== DW_FORM_exprloc
);
22470 /* Return non-zero if ATTR's value is a section offset --- classes
22471 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
22472 You may use DW_UNSND (attr) to retrieve such offsets.
22474 Section 7.5.4, "Attribute Encodings", explains that no attribute
22475 may have a value that belongs to more than one of these classes; it
22476 would be ambiguous if we did, because we use the same forms for all
22480 attr_form_is_section_offset (const struct attribute
*attr
)
22482 return (attr
->form
== DW_FORM_data4
22483 || attr
->form
== DW_FORM_data8
22484 || attr
->form
== DW_FORM_sec_offset
);
22487 /* Return non-zero if ATTR's value falls in the 'constant' class, or
22488 zero otherwise. When this function returns true, you can apply
22489 dwarf2_get_attr_constant_value to it.
22491 However, note that for some attributes you must check
22492 attr_form_is_section_offset before using this test. DW_FORM_data4
22493 and DW_FORM_data8 are members of both the constant class, and of
22494 the classes that contain offsets into other debug sections
22495 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
22496 that, if an attribute's can be either a constant or one of the
22497 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
22498 taken as section offsets, not constants.
22500 DW_FORM_data16 is not considered as dwarf2_get_attr_constant_value
22501 cannot handle that. */
22504 attr_form_is_constant (const struct attribute
*attr
)
22506 switch (attr
->form
)
22508 case DW_FORM_sdata
:
22509 case DW_FORM_udata
:
22510 case DW_FORM_data1
:
22511 case DW_FORM_data2
:
22512 case DW_FORM_data4
:
22513 case DW_FORM_data8
:
22514 case DW_FORM_implicit_const
:
22522 /* DW_ADDR is always stored already as sect_offset; despite for the forms
22523 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
22526 attr_form_is_ref (const struct attribute
*attr
)
22528 switch (attr
->form
)
22530 case DW_FORM_ref_addr
:
22535 case DW_FORM_ref_udata
:
22536 case DW_FORM_GNU_ref_alt
:
22543 /* Return the .debug_loc section to use for CU.
22544 For DWO files use .debug_loc.dwo. */
22546 static struct dwarf2_section_info
*
22547 cu_debug_loc_section (struct dwarf2_cu
*cu
)
22551 struct dwo_sections
*sections
= &cu
->dwo_unit
->dwo_file
->sections
;
22553 return cu
->header
.version
>= 5 ? §ions
->loclists
: §ions
->loc
;
22555 return (cu
->header
.version
>= 5 ? &dwarf2_per_objfile
->loclists
22556 : &dwarf2_per_objfile
->loc
);
22559 /* A helper function that fills in a dwarf2_loclist_baton. */
22562 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
22563 struct dwarf2_loclist_baton
*baton
,
22564 const struct attribute
*attr
)
22566 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
22568 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
22570 baton
->per_cu
= cu
->per_cu
;
22571 gdb_assert (baton
->per_cu
);
22572 /* We don't know how long the location list is, but make sure we
22573 don't run off the edge of the section. */
22574 baton
->size
= section
->size
- DW_UNSND (attr
);
22575 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
22576 baton
->base_address
= cu
->base_address
;
22577 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
22581 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
22582 struct dwarf2_cu
*cu
, int is_block
)
22584 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22585 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
22587 if (attr_form_is_section_offset (attr
)
22588 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
22589 the section. If so, fall through to the complaint in the
22591 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
22593 struct dwarf2_loclist_baton
*baton
;
22595 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
22597 fill_in_loclist_baton (cu
, baton
, attr
);
22599 if (cu
->base_known
== 0)
22600 complaint (&symfile_complaints
,
22601 _("Location list used without "
22602 "specifying the CU base address."));
22604 SYMBOL_ACLASS_INDEX (sym
) = (is_block
22605 ? dwarf2_loclist_block_index
22606 : dwarf2_loclist_index
);
22607 SYMBOL_LOCATION_BATON (sym
) = baton
;
22611 struct dwarf2_locexpr_baton
*baton
;
22613 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
22614 baton
->per_cu
= cu
->per_cu
;
22615 gdb_assert (baton
->per_cu
);
22617 if (attr_form_is_block (attr
))
22619 /* Note that we're just copying the block's data pointer
22620 here, not the actual data. We're still pointing into the
22621 info_buffer for SYM's objfile; right now we never release
22622 that buffer, but when we do clean up properly this may
22624 baton
->size
= DW_BLOCK (attr
)->size
;
22625 baton
->data
= DW_BLOCK (attr
)->data
;
22629 dwarf2_invalid_attrib_class_complaint ("location description",
22630 SYMBOL_NATURAL_NAME (sym
));
22634 SYMBOL_ACLASS_INDEX (sym
) = (is_block
22635 ? dwarf2_locexpr_block_index
22636 : dwarf2_locexpr_index
);
22637 SYMBOL_LOCATION_BATON (sym
) = baton
;
22641 /* Return the OBJFILE associated with the compilation unit CU. If CU
22642 came from a separate debuginfo file, then the master objfile is
22646 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
22648 struct objfile
*objfile
= per_cu
->objfile
;
22650 /* Return the master objfile, so that we can report and look up the
22651 correct file containing this variable. */
22652 if (objfile
->separate_debug_objfile_backlink
)
22653 objfile
= objfile
->separate_debug_objfile_backlink
;
22658 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
22659 (CU_HEADERP is unused in such case) or prepare a temporary copy at
22660 CU_HEADERP first. */
22662 static const struct comp_unit_head
*
22663 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
22664 struct dwarf2_per_cu_data
*per_cu
)
22666 const gdb_byte
*info_ptr
;
22669 return &per_cu
->cu
->header
;
22671 info_ptr
= per_cu
->section
->buffer
+ to_underlying (per_cu
->sect_off
);
22673 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
22674 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->section
,
22675 rcuh_kind::COMPILE
);
22680 /* Return the address size given in the compilation unit header for CU. */
22683 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
22685 struct comp_unit_head cu_header_local
;
22686 const struct comp_unit_head
*cu_headerp
;
22688 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
22690 return cu_headerp
->addr_size
;
22693 /* Return the offset size given in the compilation unit header for CU. */
22696 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
22698 struct comp_unit_head cu_header_local
;
22699 const struct comp_unit_head
*cu_headerp
;
22701 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
22703 return cu_headerp
->offset_size
;
22706 /* See its dwarf2loc.h declaration. */
22709 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
22711 struct comp_unit_head cu_header_local
;
22712 const struct comp_unit_head
*cu_headerp
;
22714 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
22716 if (cu_headerp
->version
== 2)
22717 return cu_headerp
->addr_size
;
22719 return cu_headerp
->offset_size
;
22722 /* Return the text offset of the CU. The returned offset comes from
22723 this CU's objfile. If this objfile came from a separate debuginfo
22724 file, then the offset may be different from the corresponding
22725 offset in the parent objfile. */
22728 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
22730 struct objfile
*objfile
= per_cu
->objfile
;
22732 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
22735 /* Return DWARF version number of PER_CU. */
22738 dwarf2_version (struct dwarf2_per_cu_data
*per_cu
)
22740 return per_cu
->dwarf_version
;
22743 /* Locate the .debug_info compilation unit from CU's objfile which contains
22744 the DIE at OFFSET. Raises an error on failure. */
22746 static struct dwarf2_per_cu_data
*
22747 dwarf2_find_containing_comp_unit (sect_offset sect_off
,
22748 unsigned int offset_in_dwz
,
22749 struct objfile
*objfile
)
22751 struct dwarf2_per_cu_data
*this_cu
;
22753 const sect_offset
*cu_off
;
22756 high
= dwarf2_per_objfile
->n_comp_units
- 1;
22759 struct dwarf2_per_cu_data
*mid_cu
;
22760 int mid
= low
+ (high
- low
) / 2;
22762 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
22763 cu_off
= &mid_cu
->sect_off
;
22764 if (mid_cu
->is_dwz
> offset_in_dwz
22765 || (mid_cu
->is_dwz
== offset_in_dwz
&& *cu_off
>= sect_off
))
22770 gdb_assert (low
== high
);
22771 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
22772 cu_off
= &this_cu
->sect_off
;
22773 if (this_cu
->is_dwz
!= offset_in_dwz
|| *cu_off
> sect_off
)
22775 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
22776 error (_("Dwarf Error: could not find partial DIE containing "
22777 "offset 0x%x [in module %s]"),
22778 to_underlying (sect_off
), bfd_get_filename (objfile
->obfd
));
22780 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->sect_off
22782 return dwarf2_per_objfile
->all_comp_units
[low
-1];
22786 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
22787 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
22788 && sect_off
>= this_cu
->sect_off
+ this_cu
->length
)
22789 error (_("invalid dwarf2 offset %u"), to_underlying (sect_off
));
22790 gdb_assert (sect_off
< this_cu
->sect_off
+ this_cu
->length
);
22795 /* Initialize dwarf2_cu CU, owned by PER_CU. */
22798 init_one_comp_unit (struct dwarf2_cu
*cu
, struct dwarf2_per_cu_data
*per_cu
)
22800 memset (cu
, 0, sizeof (*cu
));
22802 cu
->per_cu
= per_cu
;
22803 cu
->objfile
= per_cu
->objfile
;
22804 obstack_init (&cu
->comp_unit_obstack
);
22807 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
22810 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
22811 enum language pretend_language
)
22813 struct attribute
*attr
;
22815 /* Set the language we're debugging. */
22816 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
22818 set_cu_language (DW_UNSND (attr
), cu
);
22821 cu
->language
= pretend_language
;
22822 cu
->language_defn
= language_def (cu
->language
);
22825 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
22828 /* Release one cached compilation unit, CU. We unlink it from the tree
22829 of compilation units, but we don't remove it from the read_in_chain;
22830 the caller is responsible for that.
22831 NOTE: DATA is a void * because this function is also used as a
22832 cleanup routine. */
22835 free_heap_comp_unit (void *data
)
22837 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) data
;
22839 gdb_assert (cu
->per_cu
!= NULL
);
22840 cu
->per_cu
->cu
= NULL
;
22843 obstack_free (&cu
->comp_unit_obstack
, NULL
);
22848 /* This cleanup function is passed the address of a dwarf2_cu on the stack
22849 when we're finished with it. We can't free the pointer itself, but be
22850 sure to unlink it from the cache. Also release any associated storage. */
22853 free_stack_comp_unit (void *data
)
22855 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) data
;
22857 gdb_assert (cu
->per_cu
!= NULL
);
22858 cu
->per_cu
->cu
= NULL
;
22861 obstack_free (&cu
->comp_unit_obstack
, NULL
);
22862 cu
->partial_dies
= NULL
;
22865 /* Free all cached compilation units. */
22868 free_cached_comp_units (void *data
)
22870 dwarf2_per_objfile
->free_cached_comp_units ();
22873 /* Increase the age counter on each cached compilation unit, and free
22874 any that are too old. */
22877 age_cached_comp_units (void)
22879 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22881 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
22882 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22883 while (per_cu
!= NULL
)
22885 per_cu
->cu
->last_used
++;
22886 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
22887 dwarf2_mark (per_cu
->cu
);
22888 per_cu
= per_cu
->cu
->read_in_chain
;
22891 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22892 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22893 while (per_cu
!= NULL
)
22895 struct dwarf2_per_cu_data
*next_cu
;
22897 next_cu
= per_cu
->cu
->read_in_chain
;
22899 if (!per_cu
->cu
->mark
)
22901 free_heap_comp_unit (per_cu
->cu
);
22902 *last_chain
= next_cu
;
22905 last_chain
= &per_cu
->cu
->read_in_chain
;
22911 /* Remove a single compilation unit from the cache. */
22914 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
22916 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22918 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22919 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22920 while (per_cu
!= NULL
)
22922 struct dwarf2_per_cu_data
*next_cu
;
22924 next_cu
= per_cu
->cu
->read_in_chain
;
22926 if (per_cu
== target_per_cu
)
22928 free_heap_comp_unit (per_cu
->cu
);
22930 *last_chain
= next_cu
;
22934 last_chain
= &per_cu
->cu
->read_in_chain
;
22940 /* Release all extra memory associated with OBJFILE. */
22943 dwarf2_free_objfile (struct objfile
*objfile
)
22946 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
22947 dwarf2_objfile_data_key
);
22949 if (dwarf2_per_objfile
== NULL
)
22952 dwarf2_per_objfile
->~dwarf2_per_objfile ();
22955 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
22956 We store these in a hash table separate from the DIEs, and preserve them
22957 when the DIEs are flushed out of cache.
22959 The CU "per_cu" pointer is needed because offset alone is not enough to
22960 uniquely identify the type. A file may have multiple .debug_types sections,
22961 or the type may come from a DWO file. Furthermore, while it's more logical
22962 to use per_cu->section+offset, with Fission the section with the data is in
22963 the DWO file but we don't know that section at the point we need it.
22964 We have to use something in dwarf2_per_cu_data (or the pointer to it)
22965 because we can enter the lookup routine, get_die_type_at_offset, from
22966 outside this file, and thus won't necessarily have PER_CU->cu.
22967 Fortunately, PER_CU is stable for the life of the objfile. */
22969 struct dwarf2_per_cu_offset_and_type
22971 const struct dwarf2_per_cu_data
*per_cu
;
22972 sect_offset sect_off
;
22976 /* Hash function for a dwarf2_per_cu_offset_and_type. */
22979 per_cu_offset_and_type_hash (const void *item
)
22981 const struct dwarf2_per_cu_offset_and_type
*ofs
22982 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
22984 return (uintptr_t) ofs
->per_cu
+ to_underlying (ofs
->sect_off
);
22987 /* Equality function for a dwarf2_per_cu_offset_and_type. */
22990 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
22992 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
22993 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
22994 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
22995 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
22997 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
22998 && ofs_lhs
->sect_off
== ofs_rhs
->sect_off
);
23001 /* Set the type associated with DIE to TYPE. Save it in CU's hash
23002 table if necessary. For convenience, return TYPE.
23004 The DIEs reading must have careful ordering to:
23005 * Not cause infite loops trying to read in DIEs as a prerequisite for
23006 reading current DIE.
23007 * Not trying to dereference contents of still incompletely read in types
23008 while reading in other DIEs.
23009 * Enable referencing still incompletely read in types just by a pointer to
23010 the type without accessing its fields.
23012 Therefore caller should follow these rules:
23013 * Try to fetch any prerequisite types we may need to build this DIE type
23014 before building the type and calling set_die_type.
23015 * After building type call set_die_type for current DIE as soon as
23016 possible before fetching more types to complete the current type.
23017 * Make the type as complete as possible before fetching more types. */
23019 static struct type
*
23020 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
23022 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
23023 struct objfile
*objfile
= cu
->objfile
;
23024 struct attribute
*attr
;
23025 struct dynamic_prop prop
;
23027 /* For Ada types, make sure that the gnat-specific data is always
23028 initialized (if not already set). There are a few types where
23029 we should not be doing so, because the type-specific area is
23030 already used to hold some other piece of info (eg: TYPE_CODE_FLT
23031 where the type-specific area is used to store the floatformat).
23032 But this is not a problem, because the gnat-specific information
23033 is actually not needed for these types. */
23034 if (need_gnat_info (cu
)
23035 && TYPE_CODE (type
) != TYPE_CODE_FUNC
23036 && TYPE_CODE (type
) != TYPE_CODE_FLT
23037 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
23038 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
23039 && TYPE_CODE (type
) != TYPE_CODE_METHOD
23040 && !HAVE_GNAT_AUX_INFO (type
))
23041 INIT_GNAT_SPECIFIC (type
);
23043 /* Read DW_AT_allocated and set in type. */
23044 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
23045 if (attr_form_is_block (attr
))
23047 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
23048 add_dyn_prop (DYN_PROP_ALLOCATED
, prop
, type
, objfile
);
23050 else if (attr
!= NULL
)
23052 complaint (&symfile_complaints
,
23053 _("DW_AT_allocated has the wrong form (%s) at DIE 0x%x"),
23054 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
23055 to_underlying (die
->sect_off
));
23058 /* Read DW_AT_associated and set in type. */
23059 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
23060 if (attr_form_is_block (attr
))
23062 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
23063 add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
, type
, objfile
);
23065 else if (attr
!= NULL
)
23067 complaint (&symfile_complaints
,
23068 _("DW_AT_associated has the wrong form (%s) at DIE 0x%x"),
23069 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
23070 to_underlying (die
->sect_off
));
23073 /* Read DW_AT_data_location and set in type. */
23074 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
23075 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
23076 add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
, type
, objfile
);
23078 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
23080 dwarf2_per_objfile
->die_type_hash
=
23081 htab_create_alloc_ex (127,
23082 per_cu_offset_and_type_hash
,
23083 per_cu_offset_and_type_eq
,
23085 &objfile
->objfile_obstack
,
23086 hashtab_obstack_allocate
,
23087 dummy_obstack_deallocate
);
23090 ofs
.per_cu
= cu
->per_cu
;
23091 ofs
.sect_off
= die
->sect_off
;
23093 slot
= (struct dwarf2_per_cu_offset_and_type
**)
23094 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
23096 complaint (&symfile_complaints
,
23097 _("A problem internal to GDB: DIE 0x%x has type already set"),
23098 to_underlying (die
->sect_off
));
23099 *slot
= XOBNEW (&objfile
->objfile_obstack
,
23100 struct dwarf2_per_cu_offset_and_type
);
23105 /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash,
23106 or return NULL if the die does not have a saved type. */
23108 static struct type
*
23109 get_die_type_at_offset (sect_offset sect_off
,
23110 struct dwarf2_per_cu_data
*per_cu
)
23112 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
23114 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
23117 ofs
.per_cu
= per_cu
;
23118 ofs
.sect_off
= sect_off
;
23119 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
23120 htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
));
23127 /* Look up the type for DIE in CU in die_type_hash,
23128 or return NULL if DIE does not have a saved type. */
23130 static struct type
*
23131 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
23133 return get_die_type_at_offset (die
->sect_off
, cu
->per_cu
);
23136 /* Add a dependence relationship from CU to REF_PER_CU. */
23139 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
23140 struct dwarf2_per_cu_data
*ref_per_cu
)
23144 if (cu
->dependencies
== NULL
)
23146 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
23147 NULL
, &cu
->comp_unit_obstack
,
23148 hashtab_obstack_allocate
,
23149 dummy_obstack_deallocate
);
23151 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
23153 *slot
= ref_per_cu
;
23156 /* Subroutine of dwarf2_mark to pass to htab_traverse.
23157 Set the mark field in every compilation unit in the
23158 cache that we must keep because we are keeping CU. */
23161 dwarf2_mark_helper (void **slot
, void *data
)
23163 struct dwarf2_per_cu_data
*per_cu
;
23165 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
23167 /* cu->dependencies references may not yet have been ever read if QUIT aborts
23168 reading of the chain. As such dependencies remain valid it is not much
23169 useful to track and undo them during QUIT cleanups. */
23170 if (per_cu
->cu
== NULL
)
23173 if (per_cu
->cu
->mark
)
23175 per_cu
->cu
->mark
= 1;
23177 if (per_cu
->cu
->dependencies
!= NULL
)
23178 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
23183 /* Set the mark field in CU and in every other compilation unit in the
23184 cache that we must keep because we are keeping CU. */
23187 dwarf2_mark (struct dwarf2_cu
*cu
)
23192 if (cu
->dependencies
!= NULL
)
23193 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
23197 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
23201 per_cu
->cu
->mark
= 0;
23202 per_cu
= per_cu
->cu
->read_in_chain
;
23206 /* Trivial hash function for partial_die_info: the hash value of a DIE
23207 is its offset in .debug_info for this objfile. */
23210 partial_die_hash (const void *item
)
23212 const struct partial_die_info
*part_die
23213 = (const struct partial_die_info
*) item
;
23215 return to_underlying (part_die
->sect_off
);
23218 /* Trivial comparison function for partial_die_info structures: two DIEs
23219 are equal if they have the same offset. */
23222 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
23224 const struct partial_die_info
*part_die_lhs
23225 = (const struct partial_die_info
*) item_lhs
;
23226 const struct partial_die_info
*part_die_rhs
23227 = (const struct partial_die_info
*) item_rhs
;
23229 return part_die_lhs
->sect_off
== part_die_rhs
->sect_off
;
23232 static struct cmd_list_element
*set_dwarf_cmdlist
;
23233 static struct cmd_list_element
*show_dwarf_cmdlist
;
23236 set_dwarf_cmd (const char *args
, int from_tty
)
23238 help_list (set_dwarf_cmdlist
, "maintenance set dwarf ", all_commands
,
23243 show_dwarf_cmd (const char *args
, int from_tty
)
23245 cmd_show_list (show_dwarf_cmdlist
, from_tty
, "");
23248 /* Free data associated with OBJFILE, if necessary. */
23251 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
23253 struct dwarf2_per_objfile
*data
= (struct dwarf2_per_objfile
*) d
;
23256 /* Make sure we don't accidentally use dwarf2_per_objfile while
23258 dwarf2_per_objfile
= NULL
;
23260 for (ix
= 0; ix
< data
->n_comp_units
; ++ix
)
23261 VEC_free (dwarf2_per_cu_ptr
, data
->all_comp_units
[ix
]->imported_symtabs
);
23263 for (ix
= 0; ix
< data
->n_type_units
; ++ix
)
23264 VEC_free (dwarf2_per_cu_ptr
,
23265 data
->all_type_units
[ix
]->per_cu
.imported_symtabs
);
23266 xfree (data
->all_type_units
);
23268 VEC_free (dwarf2_section_info_def
, data
->types
);
23270 if (data
->dwo_files
)
23271 free_dwo_files (data
->dwo_files
, objfile
);
23272 if (data
->dwp_file
)
23273 gdb_bfd_unref (data
->dwp_file
->dbfd
);
23275 if (data
->dwz_file
&& data
->dwz_file
->dwz_bfd
)
23276 gdb_bfd_unref (data
->dwz_file
->dwz_bfd
);
23280 /* The "save gdb-index" command. */
23282 /* In-memory buffer to prepare data to be written later to a file. */
23286 /* Copy DATA to the end of the buffer. */
23287 template<typename T
>
23288 void append_data (const T
&data
)
23290 std::copy (reinterpret_cast<const gdb_byte
*> (&data
),
23291 reinterpret_cast<const gdb_byte
*> (&data
+ 1),
23292 grow (sizeof (data
)));
23295 /* Copy CSTR (a zero-terminated string) to the end of buffer. The
23296 terminating zero is appended too. */
23297 void append_cstr0 (const char *cstr
)
23299 const size_t size
= strlen (cstr
) + 1;
23300 std::copy (cstr
, cstr
+ size
, grow (size
));
23303 /* Accept a host-format integer in VAL and append it to the buffer
23304 as a target-format integer which is LEN bytes long. */
23305 void append_uint (size_t len
, bfd_endian byte_order
, ULONGEST val
)
23307 ::store_unsigned_integer (grow (len
), len
, byte_order
, val
);
23310 /* Return the size of the buffer. */
23311 size_t size () const
23313 return m_vec
.size ();
23316 /* Write the buffer to FILE. */
23317 void file_write (FILE *file
) const
23319 if (::fwrite (m_vec
.data (), 1, m_vec
.size (), file
) != m_vec
.size ())
23320 error (_("couldn't write data to file"));
23324 /* Grow SIZE bytes at the end of the buffer. Returns a pointer to
23325 the start of the new block. */
23326 gdb_byte
*grow (size_t size
)
23328 m_vec
.resize (m_vec
.size () + size
);
23329 return &*m_vec
.end () - size
;
23332 gdb::byte_vector m_vec
;
23335 /* An entry in the symbol table. */
23336 struct symtab_index_entry
23338 /* The name of the symbol. */
23340 /* The offset of the name in the constant pool. */
23341 offset_type index_offset
;
23342 /* A sorted vector of the indices of all the CUs that hold an object
23344 std::vector
<offset_type
> cu_indices
;
23347 /* The symbol table. This is a power-of-2-sized hash table. */
23348 struct mapped_symtab
23352 data
.resize (1024);
23355 offset_type n_elements
= 0;
23356 std::vector
<symtab_index_entry
> data
;
23359 /* Find a slot in SYMTAB for the symbol NAME. Returns a reference to
23362 Function is used only during write_hash_table so no index format backward
23363 compatibility is needed. */
23365 static symtab_index_entry
&
23366 find_slot (struct mapped_symtab
*symtab
, const char *name
)
23368 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
23370 index
= hash
& (symtab
->data
.size () - 1);
23371 step
= ((hash
* 17) & (symtab
->data
.size () - 1)) | 1;
23375 if (symtab
->data
[index
].name
== NULL
23376 || strcmp (name
, symtab
->data
[index
].name
) == 0)
23377 return symtab
->data
[index
];
23378 index
= (index
+ step
) & (symtab
->data
.size () - 1);
23382 /* Expand SYMTAB's hash table. */
23385 hash_expand (struct mapped_symtab
*symtab
)
23387 auto old_entries
= std::move (symtab
->data
);
23389 symtab
->data
.clear ();
23390 symtab
->data
.resize (old_entries
.size () * 2);
23392 for (auto &it
: old_entries
)
23393 if (it
.name
!= NULL
)
23395 auto &ref
= find_slot (symtab
, it
.name
);
23396 ref
= std::move (it
);
23400 /* Add an entry to SYMTAB. NAME is the name of the symbol.
23401 CU_INDEX is the index of the CU in which the symbol appears.
23402 IS_STATIC is one if the symbol is static, otherwise zero (global). */
23405 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
23406 int is_static
, gdb_index_symbol_kind kind
,
23407 offset_type cu_index
)
23409 offset_type cu_index_and_attrs
;
23411 ++symtab
->n_elements
;
23412 if (4 * symtab
->n_elements
/ 3 >= symtab
->data
.size ())
23413 hash_expand (symtab
);
23415 symtab_index_entry
&slot
= find_slot (symtab
, name
);
23416 if (slot
.name
== NULL
)
23419 /* index_offset is set later. */
23422 cu_index_and_attrs
= 0;
23423 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs
, cu_index
);
23424 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs
, is_static
);
23425 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs
, kind
);
23427 /* We don't want to record an index value twice as we want to avoid the
23429 We process all global symbols and then all static symbols
23430 (which would allow us to avoid the duplication by only having to check
23431 the last entry pushed), but a symbol could have multiple kinds in one CU.
23432 To keep things simple we don't worry about the duplication here and
23433 sort and uniqufy the list after we've processed all symbols. */
23434 slot
.cu_indices
.push_back (cu_index_and_attrs
);
23437 /* Sort and remove duplicates of all symbols' cu_indices lists. */
23440 uniquify_cu_indices (struct mapped_symtab
*symtab
)
23442 for (auto &entry
: symtab
->data
)
23444 if (entry
.name
!= NULL
&& !entry
.cu_indices
.empty ())
23446 auto &cu_indices
= entry
.cu_indices
;
23447 std::sort (cu_indices
.begin (), cu_indices
.end ());
23448 auto from
= std::unique (cu_indices
.begin (), cu_indices
.end ());
23449 cu_indices
.erase (from
, cu_indices
.end ());
23454 /* A form of 'const char *' suitable for container keys. Only the
23455 pointer is stored. The strings themselves are compared, not the
23460 c_str_view (const char *cstr
)
23464 bool operator== (const c_str_view
&other
) const
23466 return strcmp (m_cstr
, other
.m_cstr
) == 0;
23470 friend class c_str_view_hasher
;
23471 const char *const m_cstr
;
23474 /* A std::unordered_map::hasher for c_str_view that uses the right
23475 hash function for strings in a mapped index. */
23476 class c_str_view_hasher
23479 size_t operator () (const c_str_view
&x
) const
23481 return mapped_index_string_hash (INT_MAX
, x
.m_cstr
);
23485 /* A std::unordered_map::hasher for std::vector<>. */
23486 template<typename T
>
23487 class vector_hasher
23490 size_t operator () (const std::vector
<T
> &key
) const
23492 return iterative_hash (key
.data (),
23493 sizeof (key
.front ()) * key
.size (), 0);
23497 /* Write the mapped hash table SYMTAB to the data buffer OUTPUT, with
23498 constant pool entries going into the data buffer CPOOL. */
23501 write_hash_table (mapped_symtab
*symtab
, data_buf
&output
, data_buf
&cpool
)
23504 /* Elements are sorted vectors of the indices of all the CUs that
23505 hold an object of this name. */
23506 std::unordered_map
<std::vector
<offset_type
>, offset_type
,
23507 vector_hasher
<offset_type
>>
23510 /* We add all the index vectors to the constant pool first, to
23511 ensure alignment is ok. */
23512 for (symtab_index_entry
&entry
: symtab
->data
)
23514 if (entry
.name
== NULL
)
23516 gdb_assert (entry
.index_offset
== 0);
23518 /* Finding before inserting is faster than always trying to
23519 insert, because inserting always allocates a node, does the
23520 lookup, and then destroys the new node if another node
23521 already had the same key. C++17 try_emplace will avoid
23524 = symbol_hash_table
.find (entry
.cu_indices
);
23525 if (found
!= symbol_hash_table
.end ())
23527 entry
.index_offset
= found
->second
;
23531 symbol_hash_table
.emplace (entry
.cu_indices
, cpool
.size ());
23532 entry
.index_offset
= cpool
.size ();
23533 cpool
.append_data (MAYBE_SWAP (entry
.cu_indices
.size ()));
23534 for (const auto index
: entry
.cu_indices
)
23535 cpool
.append_data (MAYBE_SWAP (index
));
23539 /* Now write out the hash table. */
23540 std::unordered_map
<c_str_view
, offset_type
, c_str_view_hasher
> str_table
;
23541 for (const auto &entry
: symtab
->data
)
23543 offset_type str_off
, vec_off
;
23545 if (entry
.name
!= NULL
)
23547 const auto insertpair
= str_table
.emplace (entry
.name
, cpool
.size ());
23548 if (insertpair
.second
)
23549 cpool
.append_cstr0 (entry
.name
);
23550 str_off
= insertpair
.first
->second
;
23551 vec_off
= entry
.index_offset
;
23555 /* While 0 is a valid constant pool index, it is not valid
23556 to have 0 for both offsets. */
23561 output
.append_data (MAYBE_SWAP (str_off
));
23562 output
.append_data (MAYBE_SWAP (vec_off
));
23566 typedef std::unordered_map
<partial_symtab
*, unsigned int> psym_index_map
;
23568 /* Helper struct for building the address table. */
23569 struct addrmap_index_data
23571 addrmap_index_data (data_buf
&addr_vec_
, psym_index_map
&cu_index_htab_
)
23572 : addr_vec (addr_vec_
), cu_index_htab (cu_index_htab_
)
23575 struct objfile
*objfile
;
23576 data_buf
&addr_vec
;
23577 psym_index_map
&cu_index_htab
;
23579 /* Non-zero if the previous_* fields are valid.
23580 We can't write an entry until we see the next entry (since it is only then
23581 that we know the end of the entry). */
23582 int previous_valid
;
23583 /* Index of the CU in the table of all CUs in the index file. */
23584 unsigned int previous_cu_index
;
23585 /* Start address of the CU. */
23586 CORE_ADDR previous_cu_start
;
23589 /* Write an address entry to ADDR_VEC. */
23592 add_address_entry (struct objfile
*objfile
, data_buf
&addr_vec
,
23593 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
23595 CORE_ADDR baseaddr
;
23597 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
23599 addr_vec
.append_uint (8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
23600 addr_vec
.append_uint (8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
23601 addr_vec
.append_data (MAYBE_SWAP (cu_index
));
23604 /* Worker function for traversing an addrmap to build the address table. */
23607 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
23609 struct addrmap_index_data
*data
= (struct addrmap_index_data
*) datap
;
23610 struct partial_symtab
*pst
= (struct partial_symtab
*) obj
;
23612 if (data
->previous_valid
)
23613 add_address_entry (data
->objfile
, data
->addr_vec
,
23614 data
->previous_cu_start
, start_addr
,
23615 data
->previous_cu_index
);
23617 data
->previous_cu_start
= start_addr
;
23620 const auto it
= data
->cu_index_htab
.find (pst
);
23621 gdb_assert (it
!= data
->cu_index_htab
.cend ());
23622 data
->previous_cu_index
= it
->second
;
23623 data
->previous_valid
= 1;
23626 data
->previous_valid
= 0;
23631 /* Write OBJFILE's address map to ADDR_VEC.
23632 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
23633 in the index file. */
23636 write_address_map (struct objfile
*objfile
, data_buf
&addr_vec
,
23637 psym_index_map
&cu_index_htab
)
23639 struct addrmap_index_data
addrmap_index_data (addr_vec
, cu_index_htab
);
23641 /* When writing the address table, we have to cope with the fact that
23642 the addrmap iterator only provides the start of a region; we have to
23643 wait until the next invocation to get the start of the next region. */
23645 addrmap_index_data
.objfile
= objfile
;
23646 addrmap_index_data
.previous_valid
= 0;
23648 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
23649 &addrmap_index_data
);
23651 /* It's highly unlikely the last entry (end address = 0xff...ff)
23652 is valid, but we should still handle it.
23653 The end address is recorded as the start of the next region, but that
23654 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
23656 if (addrmap_index_data
.previous_valid
)
23657 add_address_entry (objfile
, addr_vec
,
23658 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
23659 addrmap_index_data
.previous_cu_index
);
23662 /* Return the symbol kind of PSYM. */
23664 static gdb_index_symbol_kind
23665 symbol_kind (struct partial_symbol
*psym
)
23667 domain_enum domain
= PSYMBOL_DOMAIN (psym
);
23668 enum address_class aclass
= PSYMBOL_CLASS (psym
);
23676 return GDB_INDEX_SYMBOL_KIND_FUNCTION
;
23678 return GDB_INDEX_SYMBOL_KIND_TYPE
;
23680 case LOC_CONST_BYTES
:
23681 case LOC_OPTIMIZED_OUT
:
23683 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
23685 /* Note: It's currently impossible to recognize psyms as enum values
23686 short of reading the type info. For now punt. */
23687 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
23689 /* There are other LOC_FOO values that one might want to classify
23690 as variables, but dwarf2read.c doesn't currently use them. */
23691 return GDB_INDEX_SYMBOL_KIND_OTHER
;
23693 case STRUCT_DOMAIN
:
23694 return GDB_INDEX_SYMBOL_KIND_TYPE
;
23696 return GDB_INDEX_SYMBOL_KIND_OTHER
;
23700 /* Add a list of partial symbols to SYMTAB. */
23703 write_psymbols (struct mapped_symtab
*symtab
,
23704 std::unordered_set
<partial_symbol
*> &psyms_seen
,
23705 struct partial_symbol
**psymp
,
23707 offset_type cu_index
,
23710 for (; count
-- > 0; ++psymp
)
23712 struct partial_symbol
*psym
= *psymp
;
23714 if (SYMBOL_LANGUAGE (psym
) == language_ada
)
23715 error (_("Ada is not currently supported by the index"));
23717 /* Only add a given psymbol once. */
23718 if (psyms_seen
.insert (psym
).second
)
23720 gdb_index_symbol_kind kind
= symbol_kind (psym
);
23722 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (psym
),
23723 is_static
, kind
, cu_index
);
23728 /* A helper struct used when iterating over debug_types. */
23729 struct signatured_type_index_data
23731 signatured_type_index_data (data_buf
&types_list_
,
23732 std::unordered_set
<partial_symbol
*> &psyms_seen_
)
23733 : types_list (types_list_
), psyms_seen (psyms_seen_
)
23736 struct objfile
*objfile
;
23737 struct mapped_symtab
*symtab
;
23738 data_buf
&types_list
;
23739 std::unordered_set
<partial_symbol
*> &psyms_seen
;
23743 /* A helper function that writes a single signatured_type to an
23747 write_one_signatured_type (void **slot
, void *d
)
23749 struct signatured_type_index_data
*info
23750 = (struct signatured_type_index_data
*) d
;
23751 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
23752 struct partial_symtab
*psymtab
= entry
->per_cu
.v
.psymtab
;
23754 write_psymbols (info
->symtab
,
23756 &info
->objfile
->global_psymbols
[psymtab
->globals_offset
],
23757 psymtab
->n_global_syms
, info
->cu_index
,
23759 write_psymbols (info
->symtab
,
23761 &info
->objfile
->static_psymbols
[psymtab
->statics_offset
],
23762 psymtab
->n_static_syms
, info
->cu_index
,
23765 info
->types_list
.append_uint (8, BFD_ENDIAN_LITTLE
,
23766 to_underlying (entry
->per_cu
.sect_off
));
23767 info
->types_list
.append_uint (8, BFD_ENDIAN_LITTLE
,
23768 to_underlying (entry
->type_offset_in_tu
));
23769 info
->types_list
.append_uint (8, BFD_ENDIAN_LITTLE
, entry
->signature
);
23776 /* Recurse into all "included" dependencies and count their symbols as
23777 if they appeared in this psymtab. */
23780 recursively_count_psymbols (struct partial_symtab
*psymtab
,
23781 size_t &psyms_seen
)
23783 for (int i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
23784 if (psymtab
->dependencies
[i
]->user
!= NULL
)
23785 recursively_count_psymbols (psymtab
->dependencies
[i
],
23788 psyms_seen
+= psymtab
->n_global_syms
;
23789 psyms_seen
+= psymtab
->n_static_syms
;
23792 /* Recurse into all "included" dependencies and write their symbols as
23793 if they appeared in this psymtab. */
23796 recursively_write_psymbols (struct objfile
*objfile
,
23797 struct partial_symtab
*psymtab
,
23798 struct mapped_symtab
*symtab
,
23799 std::unordered_set
<partial_symbol
*> &psyms_seen
,
23800 offset_type cu_index
)
23804 for (i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
23805 if (psymtab
->dependencies
[i
]->user
!= NULL
)
23806 recursively_write_psymbols (objfile
, psymtab
->dependencies
[i
],
23807 symtab
, psyms_seen
, cu_index
);
23809 write_psymbols (symtab
,
23811 &objfile
->global_psymbols
[psymtab
->globals_offset
],
23812 psymtab
->n_global_syms
, cu_index
,
23814 write_psymbols (symtab
,
23816 &objfile
->static_psymbols
[psymtab
->statics_offset
],
23817 psymtab
->n_static_syms
, cu_index
,
23821 /* Create an index file for OBJFILE in the directory DIR. */
23824 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
23826 if (dwarf2_per_objfile
->using_index
)
23827 error (_("Cannot use an index to create the index"));
23829 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
23830 error (_("Cannot make an index when the file has multiple .debug_types sections"));
23832 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
23836 if (stat (objfile_name (objfile
), &st
) < 0)
23837 perror_with_name (objfile_name (objfile
));
23839 std::string
filename (std::string (dir
) + SLASH_STRING
23840 + lbasename (objfile_name (objfile
)) + INDEX_SUFFIX
);
23842 FILE *out_file
= gdb_fopen_cloexec (filename
.c_str (), "wb").release ();
23844 error (_("Can't open `%s' for writing"), filename
.c_str ());
23846 /* Order matters here; we want FILE to be closed before FILENAME is
23847 unlinked, because on MS-Windows one cannot delete a file that is
23848 still open. (Don't call anything here that might throw until
23849 file_closer is created.) */
23850 gdb::unlinker
unlink_file (filename
.c_str ());
23851 gdb_file_up
close_out_file (out_file
);
23853 mapped_symtab symtab
;
23856 /* While we're scanning CU's create a table that maps a psymtab pointer
23857 (which is what addrmap records) to its index (which is what is recorded
23858 in the index file). This will later be needed to write the address
23860 psym_index_map cu_index_htab
;
23861 cu_index_htab
.reserve (dwarf2_per_objfile
->n_comp_units
);
23863 /* The CU list is already sorted, so we don't need to do additional
23864 work here. Also, the debug_types entries do not appear in
23865 all_comp_units, but only in their own hash table. */
23867 /* The psyms_seen set is potentially going to be largish (~40k
23868 elements when indexing a -g3 build of GDB itself). Estimate the
23869 number of elements in order to avoid too many rehashes, which
23870 require rebuilding buckets and thus many trips to
23872 size_t psyms_count
= 0;
23873 for (int i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
23875 struct dwarf2_per_cu_data
*per_cu
23876 = dwarf2_per_objfile
->all_comp_units
[i
];
23877 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
23879 if (psymtab
!= NULL
&& psymtab
->user
== NULL
)
23880 recursively_count_psymbols (psymtab
, psyms_count
);
23882 /* Generating an index for gdb itself shows a ratio of
23883 TOTAL_SEEN_SYMS/UNIQUE_SYMS or ~5. 4 seems like a good bet. */
23884 std::unordered_set
<partial_symbol
*> psyms_seen (psyms_count
/ 4);
23885 for (int i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
23887 struct dwarf2_per_cu_data
*per_cu
23888 = dwarf2_per_objfile
->all_comp_units
[i
];
23889 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
23891 /* CU of a shared file from 'dwz -m' may be unused by this main file.
23892 It may be referenced from a local scope but in such case it does not
23893 need to be present in .gdb_index. */
23894 if (psymtab
== NULL
)
23897 if (psymtab
->user
== NULL
)
23898 recursively_write_psymbols (objfile
, psymtab
, &symtab
,
23901 const auto insertpair
= cu_index_htab
.emplace (psymtab
, i
);
23902 gdb_assert (insertpair
.second
);
23904 cu_list
.append_uint (8, BFD_ENDIAN_LITTLE
,
23905 to_underlying (per_cu
->sect_off
));
23906 cu_list
.append_uint (8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
23909 /* Dump the address map. */
23911 write_address_map (objfile
, addr_vec
, cu_index_htab
);
23913 /* Write out the .debug_type entries, if any. */
23914 data_buf types_cu_list
;
23915 if (dwarf2_per_objfile
->signatured_types
)
23917 signatured_type_index_data
sig_data (types_cu_list
,
23920 sig_data
.objfile
= objfile
;
23921 sig_data
.symtab
= &symtab
;
23922 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
23923 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
23924 write_one_signatured_type
, &sig_data
);
23927 /* Now that we've processed all symbols we can shrink their cu_indices
23929 uniquify_cu_indices (&symtab
);
23931 data_buf symtab_vec
, constant_pool
;
23932 write_hash_table (&symtab
, symtab_vec
, constant_pool
);
23935 const offset_type size_of_contents
= 6 * sizeof (offset_type
);
23936 offset_type total_len
= size_of_contents
;
23938 /* The version number. */
23939 contents
.append_data (MAYBE_SWAP (8));
23941 /* The offset of the CU list from the start of the file. */
23942 contents
.append_data (MAYBE_SWAP (total_len
));
23943 total_len
+= cu_list
.size ();
23945 /* The offset of the types CU list from the start of the file. */
23946 contents
.append_data (MAYBE_SWAP (total_len
));
23947 total_len
+= types_cu_list
.size ();
23949 /* The offset of the address table from the start of the file. */
23950 contents
.append_data (MAYBE_SWAP (total_len
));
23951 total_len
+= addr_vec
.size ();
23953 /* The offset of the symbol table from the start of the file. */
23954 contents
.append_data (MAYBE_SWAP (total_len
));
23955 total_len
+= symtab_vec
.size ();
23957 /* The offset of the constant pool from the start of the file. */
23958 contents
.append_data (MAYBE_SWAP (total_len
));
23959 total_len
+= constant_pool
.size ();
23961 gdb_assert (contents
.size () == size_of_contents
);
23963 contents
.file_write (out_file
);
23964 cu_list
.file_write (out_file
);
23965 types_cu_list
.file_write (out_file
);
23966 addr_vec
.file_write (out_file
);
23967 symtab_vec
.file_write (out_file
);
23968 constant_pool
.file_write (out_file
);
23970 /* We want to keep the file. */
23971 unlink_file
.keep ();
23974 /* Implementation of the `save gdb-index' command.
23976 Note that the file format used by this command is documented in the
23977 GDB manual. Any changes here must be documented there. */
23980 save_gdb_index_command (const char *arg
, int from_tty
)
23982 struct objfile
*objfile
;
23985 error (_("usage: save gdb-index DIRECTORY"));
23987 ALL_OBJFILES (objfile
)
23991 /* If the objfile does not correspond to an actual file, skip it. */
23992 if (stat (objfile_name (objfile
), &st
) < 0)
23996 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
23997 dwarf2_objfile_data_key
);
23998 if (dwarf2_per_objfile
)
24003 write_psymtabs_to_index (objfile
, arg
);
24005 CATCH (except
, RETURN_MASK_ERROR
)
24007 exception_fprintf (gdb_stderr
, except
,
24008 _("Error while writing index for `%s': "),
24009 objfile_name (objfile
));
24018 int dwarf_always_disassemble
;
24021 show_dwarf_always_disassemble (struct ui_file
*file
, int from_tty
,
24022 struct cmd_list_element
*c
, const char *value
)
24024 fprintf_filtered (file
,
24025 _("Whether to always disassemble "
24026 "DWARF expressions is %s.\n"),
24031 show_check_physname (struct ui_file
*file
, int from_tty
,
24032 struct cmd_list_element
*c
, const char *value
)
24034 fprintf_filtered (file
,
24035 _("Whether to check \"physname\" is %s.\n"),
24040 _initialize_dwarf2_read (void)
24042 struct cmd_list_element
*c
;
24044 dwarf2_objfile_data_key
24045 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
24047 add_prefix_cmd ("dwarf", class_maintenance
, set_dwarf_cmd
, _("\
24048 Set DWARF specific variables.\n\
24049 Configure DWARF variables such as the cache size"),
24050 &set_dwarf_cmdlist
, "maintenance set dwarf ",
24051 0/*allow-unknown*/, &maintenance_set_cmdlist
);
24053 add_prefix_cmd ("dwarf", class_maintenance
, show_dwarf_cmd
, _("\
24054 Show DWARF specific variables\n\
24055 Show DWARF variables such as the cache size"),
24056 &show_dwarf_cmdlist
, "maintenance show dwarf ",
24057 0/*allow-unknown*/, &maintenance_show_cmdlist
);
24059 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
24060 &dwarf_max_cache_age
, _("\
24061 Set the upper bound on the age of cached DWARF compilation units."), _("\
24062 Show the upper bound on the age of cached DWARF compilation units."), _("\
24063 A higher limit means that cached compilation units will be stored\n\
24064 in memory longer, and more total memory will be used. Zero disables\n\
24065 caching, which can slow down startup."),
24067 show_dwarf_max_cache_age
,
24068 &set_dwarf_cmdlist
,
24069 &show_dwarf_cmdlist
);
24071 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
24072 &dwarf_always_disassemble
, _("\
24073 Set whether `info address' always disassembles DWARF expressions."), _("\
24074 Show whether `info address' always disassembles DWARF expressions."), _("\
24075 When enabled, DWARF expressions are always printed in an assembly-like\n\
24076 syntax. When disabled, expressions will be printed in a more\n\
24077 conversational style, when possible."),
24079 show_dwarf_always_disassemble
,
24080 &set_dwarf_cmdlist
,
24081 &show_dwarf_cmdlist
);
24083 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
24084 Set debugging of the DWARF reader."), _("\
24085 Show debugging of the DWARF reader."), _("\
24086 When enabled (non-zero), debugging messages are printed during DWARF\n\
24087 reading and symtab expansion. A value of 1 (one) provides basic\n\
24088 information. A value greater than 1 provides more verbose information."),
24091 &setdebuglist
, &showdebuglist
);
24093 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
24094 Set debugging of the DWARF DIE reader."), _("\
24095 Show debugging of the DWARF DIE reader."), _("\
24096 When enabled (non-zero), DIEs are dumped after they are read in.\n\
24097 The value is the maximum depth to print."),
24100 &setdebuglist
, &showdebuglist
);
24102 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
24103 Set debugging of the dwarf line reader."), _("\
24104 Show debugging of the dwarf line reader."), _("\
24105 When enabled (non-zero), line number entries are dumped as they are read in.\n\
24106 A value of 1 (one) provides basic information.\n\
24107 A value greater than 1 provides more verbose information."),
24110 &setdebuglist
, &showdebuglist
);
24112 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
24113 Set cross-checking of \"physname\" code against demangler."), _("\
24114 Show cross-checking of \"physname\" code against demangler."), _("\
24115 When enabled, GDB's internal \"physname\" code is checked against\n\
24117 NULL
, show_check_physname
,
24118 &setdebuglist
, &showdebuglist
);
24120 add_setshow_boolean_cmd ("use-deprecated-index-sections",
24121 no_class
, &use_deprecated_index_sections
, _("\
24122 Set whether to use deprecated gdb_index sections."), _("\
24123 Show whether to use deprecated gdb_index sections."), _("\
24124 When enabled, deprecated .gdb_index sections are used anyway.\n\
24125 Normally they are ignored either because of a missing feature or\n\
24126 performance issue.\n\
24127 Warning: This option must be enabled before gdb reads the file."),
24130 &setlist
, &showlist
);
24132 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
24134 Save a gdb-index file.\n\
24135 Usage: save gdb-index DIRECTORY"),
24137 set_cmd_completer (c
, filename_completer
);
24139 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
24140 &dwarf2_locexpr_funcs
);
24141 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
24142 &dwarf2_loclist_funcs
);
24144 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
24145 &dwarf2_block_frame_base_locexpr_funcs
);
24146 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
24147 &dwarf2_block_frame_base_loclist_funcs
);