1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994-2018 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. */
32 #include "dwarf2read.h"
33 #include "dwarf-index-common.h"
42 #include "gdb-demangle.h"
43 #include "expression.h"
44 #include "filenames.h" /* for DOSish file names */
47 #include "complaints.h"
49 #include "dwarf2expr.h"
50 #include "dwarf2loc.h"
51 #include "cp-support.h"
57 #include "typeprint.h"
60 #include "completer.h"
65 #include "gdbcore.h" /* for gnutarget */
66 #include "gdb/gdb-index.h"
71 #include "filestuff.h"
73 #include "namespace.h"
74 #include "common/gdb_unlinker.h"
75 #include "common/function-view.h"
76 #include "common/gdb_optional.h"
77 #include "common/underlying.h"
78 #include "common/byte-vector.h"
79 #include "common/hash_enum.h"
80 #include "filename-seen-cache.h"
83 #include <sys/types.h>
85 #include <unordered_set>
86 #include <unordered_map>
90 #include <forward_list>
91 #include "rust-lang.h"
92 #include "common/pathstuff.h"
94 /* When == 1, print basic high level tracing messages.
95 When > 1, be more verbose.
96 This is in contrast to the low level DIE reading of dwarf_die_debug. */
97 static unsigned int dwarf_read_debug
= 0;
99 /* When non-zero, dump DIEs after they are read in. */
100 static unsigned int dwarf_die_debug
= 0;
102 /* When non-zero, dump line number entries as they are read in. */
103 static unsigned int dwarf_line_debug
= 0;
105 /* When non-zero, cross-check physname against demangler. */
106 static int check_physname
= 0;
108 /* When non-zero, do not reject deprecated .gdb_index sections. */
109 static int use_deprecated_index_sections
= 0;
111 static const struct objfile_data
*dwarf2_objfile_data_key
;
113 /* The "aclass" indices for various kinds of computed DWARF symbols. */
115 static int dwarf2_locexpr_index
;
116 static int dwarf2_loclist_index
;
117 static int dwarf2_locexpr_block_index
;
118 static int dwarf2_loclist_block_index
;
120 /* An index into a (C++) symbol name component in a symbol name as
121 recorded in the mapped_index's symbol table. For each C++ symbol
122 in the symbol table, we record one entry for the start of each
123 component in the symbol in a table of name components, and then
124 sort the table, in order to be able to binary search symbol names,
125 ignoring leading namespaces, both completion and regular look up.
126 For example, for symbol "A::B::C", we'll have an entry that points
127 to "A::B::C", another that points to "B::C", and another for "C".
128 Note that function symbols in GDB index have no parameter
129 information, just the function/method names. You can convert a
130 name_component to a "const char *" using the
131 'mapped_index::symbol_name_at(offset_type)' method. */
133 struct name_component
135 /* Offset in the symbol name where the component starts. Stored as
136 a (32-bit) offset instead of a pointer to save memory and improve
137 locality on 64-bit architectures. */
138 offset_type name_offset
;
140 /* The symbol's index in the symbol and constant pool tables of a
145 /* Base class containing bits shared by both .gdb_index and
146 .debug_name indexes. */
148 struct mapped_index_base
150 /* The name_component table (a sorted vector). See name_component's
151 description above. */
152 std::vector
<name_component
> name_components
;
154 /* How NAME_COMPONENTS is sorted. */
155 enum case_sensitivity name_components_casing
;
157 /* Return the number of names in the symbol table. */
158 virtual size_t symbol_name_count () const = 0;
160 /* Get the name of the symbol at IDX in the symbol table. */
161 virtual const char *symbol_name_at (offset_type idx
) const = 0;
163 /* Return whether the name at IDX in the symbol table should be
165 virtual bool symbol_name_slot_invalid (offset_type idx
) const
170 /* Build the symbol name component sorted vector, if we haven't
172 void build_name_components ();
174 /* Returns the lower (inclusive) and upper (exclusive) bounds of the
175 possible matches for LN_NO_PARAMS in the name component
177 std::pair
<std::vector
<name_component
>::const_iterator
,
178 std::vector
<name_component
>::const_iterator
>
179 find_name_components_bounds (const lookup_name_info
&ln_no_params
) const;
181 /* Prevent deleting/destroying via a base class pointer. */
183 ~mapped_index_base() = default;
186 /* A description of the mapped index. The file format is described in
187 a comment by the code that writes the index. */
188 struct mapped_index final
: public mapped_index_base
190 /* A slot/bucket in the symbol table hash. */
191 struct symbol_table_slot
193 const offset_type name
;
194 const offset_type vec
;
197 /* Index data format version. */
200 /* The total length of the buffer. */
203 /* The address table data. */
204 gdb::array_view
<const gdb_byte
> address_table
;
206 /* The symbol table, implemented as a hash table. */
207 gdb::array_view
<symbol_table_slot
> symbol_table
;
209 /* A pointer to the constant pool. */
210 const char *constant_pool
;
212 bool symbol_name_slot_invalid (offset_type idx
) const override
214 const auto &bucket
= this->symbol_table
[idx
];
215 return bucket
.name
== 0 && bucket
.vec
;
218 /* Convenience method to get at the name of the symbol at IDX in the
220 const char *symbol_name_at (offset_type idx
) const override
221 { return this->constant_pool
+ MAYBE_SWAP (this->symbol_table
[idx
].name
); }
223 size_t symbol_name_count () const override
224 { return this->symbol_table
.size (); }
227 /* A description of the mapped .debug_names.
228 Uninitialized map has CU_COUNT 0. */
229 struct mapped_debug_names final
: public mapped_index_base
231 mapped_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile_
)
232 : dwarf2_per_objfile (dwarf2_per_objfile_
)
235 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
236 bfd_endian dwarf5_byte_order
;
237 bool dwarf5_is_dwarf64
;
238 bool augmentation_is_gdb
;
240 uint32_t cu_count
= 0;
241 uint32_t tu_count
, bucket_count
, name_count
;
242 const gdb_byte
*cu_table_reordered
, *tu_table_reordered
;
243 const uint32_t *bucket_table_reordered
, *hash_table_reordered
;
244 const gdb_byte
*name_table_string_offs_reordered
;
245 const gdb_byte
*name_table_entry_offs_reordered
;
246 const gdb_byte
*entry_pool
;
253 /* Attribute name DW_IDX_*. */
256 /* Attribute form DW_FORM_*. */
259 /* Value if FORM is DW_FORM_implicit_const. */
260 LONGEST implicit_const
;
262 std::vector
<attr
> attr_vec
;
265 std::unordered_map
<ULONGEST
, index_val
> abbrev_map
;
267 const char *namei_to_name (uint32_t namei
) const;
269 /* Implementation of the mapped_index_base virtual interface, for
270 the name_components cache. */
272 const char *symbol_name_at (offset_type idx
) const override
273 { return namei_to_name (idx
); }
275 size_t symbol_name_count () const override
276 { return this->name_count
; }
279 /* See dwarf2read.h. */
282 get_dwarf2_per_objfile (struct objfile
*objfile
)
284 return ((struct dwarf2_per_objfile
*)
285 objfile_data (objfile
, dwarf2_objfile_data_key
));
288 /* Set the dwarf2_per_objfile associated to OBJFILE. */
291 set_dwarf2_per_objfile (struct objfile
*objfile
,
292 struct dwarf2_per_objfile
*dwarf2_per_objfile
)
294 gdb_assert (get_dwarf2_per_objfile (objfile
) == NULL
);
295 set_objfile_data (objfile
, dwarf2_objfile_data_key
, dwarf2_per_objfile
);
298 /* Default names of the debugging sections. */
300 /* Note that if the debugging section has been compressed, it might
301 have a name like .zdebug_info. */
303 static const struct dwarf2_debug_sections dwarf2_elf_names
=
305 { ".debug_info", ".zdebug_info" },
306 { ".debug_abbrev", ".zdebug_abbrev" },
307 { ".debug_line", ".zdebug_line" },
308 { ".debug_loc", ".zdebug_loc" },
309 { ".debug_loclists", ".zdebug_loclists" },
310 { ".debug_macinfo", ".zdebug_macinfo" },
311 { ".debug_macro", ".zdebug_macro" },
312 { ".debug_str", ".zdebug_str" },
313 { ".debug_line_str", ".zdebug_line_str" },
314 { ".debug_ranges", ".zdebug_ranges" },
315 { ".debug_rnglists", ".zdebug_rnglists" },
316 { ".debug_types", ".zdebug_types" },
317 { ".debug_addr", ".zdebug_addr" },
318 { ".debug_frame", ".zdebug_frame" },
319 { ".eh_frame", NULL
},
320 { ".gdb_index", ".zgdb_index" },
321 { ".debug_names", ".zdebug_names" },
322 { ".debug_aranges", ".zdebug_aranges" },
326 /* List of DWO/DWP sections. */
328 static const struct dwop_section_names
330 struct dwarf2_section_names abbrev_dwo
;
331 struct dwarf2_section_names info_dwo
;
332 struct dwarf2_section_names line_dwo
;
333 struct dwarf2_section_names loc_dwo
;
334 struct dwarf2_section_names loclists_dwo
;
335 struct dwarf2_section_names macinfo_dwo
;
336 struct dwarf2_section_names macro_dwo
;
337 struct dwarf2_section_names str_dwo
;
338 struct dwarf2_section_names str_offsets_dwo
;
339 struct dwarf2_section_names types_dwo
;
340 struct dwarf2_section_names cu_index
;
341 struct dwarf2_section_names tu_index
;
345 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
346 { ".debug_info.dwo", ".zdebug_info.dwo" },
347 { ".debug_line.dwo", ".zdebug_line.dwo" },
348 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
349 { ".debug_loclists.dwo", ".zdebug_loclists.dwo" },
350 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
351 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
352 { ".debug_str.dwo", ".zdebug_str.dwo" },
353 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
354 { ".debug_types.dwo", ".zdebug_types.dwo" },
355 { ".debug_cu_index", ".zdebug_cu_index" },
356 { ".debug_tu_index", ".zdebug_tu_index" },
359 /* local data types */
361 /* The data in a compilation unit header, after target2host
362 translation, looks like this. */
363 struct comp_unit_head
367 unsigned char addr_size
;
368 unsigned char signed_addr_p
;
369 sect_offset abbrev_sect_off
;
371 /* Size of file offsets; either 4 or 8. */
372 unsigned int offset_size
;
374 /* Size of the length field; either 4 or 12. */
375 unsigned int initial_length_size
;
377 enum dwarf_unit_type unit_type
;
379 /* Offset to the first byte of this compilation unit header in the
380 .debug_info section, for resolving relative reference dies. */
381 sect_offset sect_off
;
383 /* Offset to first die in this cu from the start of the cu.
384 This will be the first byte following the compilation unit header. */
385 cu_offset first_die_cu_offset
;
387 /* 64-bit signature of this type unit - it is valid only for
388 UNIT_TYPE DW_UT_type. */
391 /* For types, offset in the type's DIE of the type defined by this TU. */
392 cu_offset type_cu_offset_in_tu
;
395 /* Type used for delaying computation of method physnames.
396 See comments for compute_delayed_physnames. */
397 struct delayed_method_info
399 /* The type to which the method is attached, i.e., its parent class. */
402 /* The index of the method in the type's function fieldlists. */
405 /* The index of the method in the fieldlist. */
408 /* The name of the DIE. */
411 /* The DIE associated with this method. */
412 struct die_info
*die
;
415 /* Internal state when decoding a particular compilation unit. */
418 explicit dwarf2_cu (struct dwarf2_per_cu_data
*per_cu
);
421 DISABLE_COPY_AND_ASSIGN (dwarf2_cu
);
423 /* The header of the compilation unit. */
424 struct comp_unit_head header
{};
426 /* Base address of this compilation unit. */
427 CORE_ADDR base_address
= 0;
429 /* Non-zero if base_address has been set. */
432 /* The language we are debugging. */
433 enum language language
= language_unknown
;
434 const struct language_defn
*language_defn
= nullptr;
436 const char *producer
= nullptr;
438 /* The generic symbol table building routines have separate lists for
439 file scope symbols and all all other scopes (local scopes). So
440 we need to select the right one to pass to add_symbol_to_list().
441 We do it by keeping a pointer to the correct list in list_in_scope.
443 FIXME: The original dwarf code just treated the file scope as the
444 first local scope, and all other local scopes as nested local
445 scopes, and worked fine. Check to see if we really need to
446 distinguish these in buildsym.c. */
447 struct pending
**list_in_scope
= nullptr;
449 /* Hash table holding all the loaded partial DIEs
450 with partial_die->offset.SECT_OFF as hash. */
451 htab_t partial_dies
= nullptr;
453 /* Storage for things with the same lifetime as this read-in compilation
454 unit, including partial DIEs. */
455 auto_obstack comp_unit_obstack
;
457 /* When multiple dwarf2_cu structures are living in memory, this field
458 chains them all together, so that they can be released efficiently.
459 We will probably also want a generation counter so that most-recently-used
460 compilation units are cached... */
461 struct dwarf2_per_cu_data
*read_in_chain
= nullptr;
463 /* Backlink to our per_cu entry. */
464 struct dwarf2_per_cu_data
*per_cu
;
466 /* How many compilation units ago was this CU last referenced? */
469 /* A hash table of DIE cu_offset for following references with
470 die_info->offset.sect_off as hash. */
471 htab_t die_hash
= nullptr;
473 /* Full DIEs if read in. */
474 struct die_info
*dies
= nullptr;
476 /* A set of pointers to dwarf2_per_cu_data objects for compilation
477 units referenced by this one. Only set during full symbol processing;
478 partial symbol tables do not have dependencies. */
479 htab_t dependencies
= nullptr;
481 /* Header data from the line table, during full symbol processing. */
482 struct line_header
*line_header
= nullptr;
483 /* Non-NULL if LINE_HEADER is owned by this DWARF_CU. Otherwise,
484 it's owned by dwarf2_per_objfile::line_header_hash. If non-NULL,
485 this is the DW_TAG_compile_unit die for this CU. We'll hold on
486 to the line header as long as this DIE is being processed. See
487 process_die_scope. */
488 die_info
*line_header_die_owner
= nullptr;
490 /* A list of methods which need to have physnames computed
491 after all type information has been read. */
492 std::vector
<delayed_method_info
> method_list
;
494 /* To be copied to symtab->call_site_htab. */
495 htab_t call_site_htab
= nullptr;
497 /* Non-NULL if this CU came from a DWO file.
498 There is an invariant here that is important to remember:
499 Except for attributes copied from the top level DIE in the "main"
500 (or "stub") file in preparation for reading the DWO file
501 (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
502 Either there isn't a DWO file (in which case this is NULL and the point
503 is moot), or there is and either we're not going to read it (in which
504 case this is NULL) or there is and we are reading it (in which case this
506 struct dwo_unit
*dwo_unit
= nullptr;
508 /* The DW_AT_addr_base attribute if present, zero otherwise
509 (zero is a valid value though).
510 Note this value comes from the Fission stub CU/TU's DIE. */
511 ULONGEST addr_base
= 0;
513 /* The DW_AT_ranges_base attribute if present, zero otherwise
514 (zero is a valid value though).
515 Note this value comes from the Fission stub CU/TU's DIE.
516 Also note that the value is zero in the non-DWO case so this value can
517 be used without needing to know whether DWO files are in use or not.
518 N.B. This does not apply to DW_AT_ranges appearing in
519 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
520 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
521 DW_AT_ranges_base *would* have to be applied, and we'd have to care
522 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
523 ULONGEST ranges_base
= 0;
525 /* When reading debug info generated by older versions of rustc, we
526 have to rewrite some union types to be struct types with a
527 variant part. This rewriting must be done after the CU is fully
528 read in, because otherwise at the point of rewriting some struct
529 type might not have been fully processed. So, we keep a list of
530 all such types here and process them after expansion. */
531 std::vector
<struct type
*> rust_unions
;
533 /* Mark used when releasing cached dies. */
534 unsigned int mark
: 1;
536 /* This CU references .debug_loc. See the symtab->locations_valid field.
537 This test is imperfect as there may exist optimized debug code not using
538 any location list and still facing inlining issues if handled as
539 unoptimized code. For a future better test see GCC PR other/32998. */
540 unsigned int has_loclist
: 1;
542 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set
543 if all the producer_is_* fields are valid. This information is cached
544 because profiling CU expansion showed excessive time spent in
545 producer_is_gxx_lt_4_6. */
546 unsigned int checked_producer
: 1;
547 unsigned int producer_is_gxx_lt_4_6
: 1;
548 unsigned int producer_is_gcc_lt_4_3
: 1;
549 unsigned int producer_is_icc_lt_14
: 1;
551 /* When set, the file that we're processing is known to have
552 debugging info for C++ namespaces. GCC 3.3.x did not produce
553 this information, but later versions do. */
555 unsigned int processing_has_namespace_info
: 1;
557 struct partial_die_info
*find_partial_die (sect_offset sect_off
);
560 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
561 This includes type_unit_group and quick_file_names. */
563 struct stmt_list_hash
565 /* The DWO unit this table is from or NULL if there is none. */
566 struct dwo_unit
*dwo_unit
;
568 /* Offset in .debug_line or .debug_line.dwo. */
569 sect_offset line_sect_off
;
572 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
573 an object of this type. */
575 struct type_unit_group
577 /* dwarf2read.c's main "handle" on a TU symtab.
578 To simplify things we create an artificial CU that "includes" all the
579 type units using this stmt_list so that the rest of the code still has
580 a "per_cu" handle on the symtab.
581 This PER_CU is recognized by having no section. */
582 #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL)
583 struct dwarf2_per_cu_data per_cu
;
585 /* The TUs that share this DW_AT_stmt_list entry.
586 This is added to while parsing type units to build partial symtabs,
587 and is deleted afterwards and not used again. */
588 VEC (sig_type_ptr
) *tus
;
590 /* The compunit symtab.
591 Type units in a group needn't all be defined in the same source file,
592 so we create an essentially anonymous symtab as the compunit symtab. */
593 struct compunit_symtab
*compunit_symtab
;
595 /* The data used to construct the hash key. */
596 struct stmt_list_hash hash
;
598 /* The number of symtabs from the line header.
599 The value here must match line_header.num_file_names. */
600 unsigned int num_symtabs
;
602 /* The symbol tables for this TU (obtained from the files listed in
604 WARNING: The order of entries here must match the order of entries
605 in the line header. After the first TU using this type_unit_group, the
606 line header for the subsequent TUs is recreated from this. This is done
607 because we need to use the same symtabs for each TU using the same
608 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
609 there's no guarantee the line header doesn't have duplicate entries. */
610 struct symtab
**symtabs
;
613 /* These sections are what may appear in a (real or virtual) DWO file. */
617 struct dwarf2_section_info abbrev
;
618 struct dwarf2_section_info line
;
619 struct dwarf2_section_info loc
;
620 struct dwarf2_section_info loclists
;
621 struct dwarf2_section_info macinfo
;
622 struct dwarf2_section_info macro
;
623 struct dwarf2_section_info str
;
624 struct dwarf2_section_info str_offsets
;
625 /* In the case of a virtual DWO file, these two are unused. */
626 struct dwarf2_section_info info
;
627 VEC (dwarf2_section_info_def
) *types
;
630 /* CUs/TUs in DWP/DWO files. */
634 /* Backlink to the containing struct dwo_file. */
635 struct dwo_file
*dwo_file
;
637 /* The "id" that distinguishes this CU/TU.
638 .debug_info calls this "dwo_id", .debug_types calls this "signature".
639 Since signatures came first, we stick with it for consistency. */
642 /* The section this CU/TU lives in, in the DWO file. */
643 struct dwarf2_section_info
*section
;
645 /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */
646 sect_offset sect_off
;
649 /* For types, offset in the type's DIE of the type defined by this TU. */
650 cu_offset type_offset_in_tu
;
653 /* include/dwarf2.h defines the DWP section codes.
654 It defines a max value but it doesn't define a min value, which we
655 use for error checking, so provide one. */
657 enum dwp_v2_section_ids
662 /* Data for one DWO file.
664 This includes virtual DWO files (a virtual DWO file is a DWO file as it
665 appears in a DWP file). DWP files don't really have DWO files per se -
666 comdat folding of types "loses" the DWO file they came from, and from
667 a high level view DWP files appear to contain a mass of random types.
668 However, to maintain consistency with the non-DWP case we pretend DWP
669 files contain virtual DWO files, and we assign each TU with one virtual
670 DWO file (generally based on the line and abbrev section offsets -
671 a heuristic that seems to work in practice). */
675 /* The DW_AT_GNU_dwo_name attribute.
676 For virtual DWO files the name is constructed from the section offsets
677 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
678 from related CU+TUs. */
679 const char *dwo_name
;
681 /* The DW_AT_comp_dir attribute. */
682 const char *comp_dir
;
684 /* The bfd, when the file is open. Otherwise this is NULL.
685 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
688 /* The sections that make up this DWO file.
689 Remember that for virtual DWO files in DWP V2, these are virtual
690 sections (for lack of a better name). */
691 struct dwo_sections sections
;
693 /* The CUs in the file.
694 Each element is a struct dwo_unit. Multiple CUs per DWO are supported as
695 an extension to handle LLVM's Link Time Optimization output (where
696 multiple source files may be compiled into a single object/dwo pair). */
699 /* Table of TUs in the file.
700 Each element is a struct dwo_unit. */
704 /* These sections are what may appear in a DWP file. */
708 /* These are used by both DWP version 1 and 2. */
709 struct dwarf2_section_info str
;
710 struct dwarf2_section_info cu_index
;
711 struct dwarf2_section_info tu_index
;
713 /* These are only used by DWP version 2 files.
714 In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other
715 sections are referenced by section number, and are not recorded here.
716 In DWP version 2 there is at most one copy of all these sections, each
717 section being (effectively) comprised of the concatenation of all of the
718 individual sections that exist in the version 1 format.
719 To keep the code simple we treat each of these concatenated pieces as a
720 section itself (a virtual section?). */
721 struct dwarf2_section_info abbrev
;
722 struct dwarf2_section_info info
;
723 struct dwarf2_section_info line
;
724 struct dwarf2_section_info loc
;
725 struct dwarf2_section_info macinfo
;
726 struct dwarf2_section_info macro
;
727 struct dwarf2_section_info str_offsets
;
728 struct dwarf2_section_info types
;
731 /* These sections are what may appear in a virtual DWO file in DWP version 1.
732 A virtual DWO file is a DWO file as it appears in a DWP file. */
734 struct virtual_v1_dwo_sections
736 struct dwarf2_section_info abbrev
;
737 struct dwarf2_section_info line
;
738 struct dwarf2_section_info loc
;
739 struct dwarf2_section_info macinfo
;
740 struct dwarf2_section_info macro
;
741 struct dwarf2_section_info str_offsets
;
742 /* Each DWP hash table entry records one CU or one TU.
743 That is recorded here, and copied to dwo_unit.section. */
744 struct dwarf2_section_info info_or_types
;
747 /* Similar to virtual_v1_dwo_sections, but for DWP version 2.
748 In version 2, the sections of the DWO files are concatenated together
749 and stored in one section of that name. Thus each ELF section contains
750 several "virtual" sections. */
752 struct virtual_v2_dwo_sections
754 bfd_size_type abbrev_offset
;
755 bfd_size_type abbrev_size
;
757 bfd_size_type line_offset
;
758 bfd_size_type line_size
;
760 bfd_size_type loc_offset
;
761 bfd_size_type loc_size
;
763 bfd_size_type macinfo_offset
;
764 bfd_size_type macinfo_size
;
766 bfd_size_type macro_offset
;
767 bfd_size_type macro_size
;
769 bfd_size_type str_offsets_offset
;
770 bfd_size_type str_offsets_size
;
772 /* Each DWP hash table entry records one CU or one TU.
773 That is recorded here, and copied to dwo_unit.section. */
774 bfd_size_type info_or_types_offset
;
775 bfd_size_type info_or_types_size
;
778 /* Contents of DWP hash tables. */
780 struct dwp_hash_table
782 uint32_t version
, nr_columns
;
783 uint32_t nr_units
, nr_slots
;
784 const gdb_byte
*hash_table
, *unit_table
;
789 const gdb_byte
*indices
;
793 /* This is indexed by column number and gives the id of the section
795 #define MAX_NR_V2_DWO_SECTIONS \
796 (1 /* .debug_info or .debug_types */ \
797 + 1 /* .debug_abbrev */ \
798 + 1 /* .debug_line */ \
799 + 1 /* .debug_loc */ \
800 + 1 /* .debug_str_offsets */ \
801 + 1 /* .debug_macro or .debug_macinfo */)
802 int section_ids
[MAX_NR_V2_DWO_SECTIONS
];
803 const gdb_byte
*offsets
;
804 const gdb_byte
*sizes
;
809 /* Data for one DWP file. */
813 /* Name of the file. */
816 /* File format version. */
822 /* Section info for this file. */
823 struct dwp_sections sections
;
825 /* Table of CUs in the file. */
826 const struct dwp_hash_table
*cus
;
828 /* Table of TUs in the file. */
829 const struct dwp_hash_table
*tus
;
831 /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
835 /* Table to map ELF section numbers to their sections.
836 This is only needed for the DWP V1 file format. */
837 unsigned int num_sections
;
838 asection
**elf_sections
;
841 /* This represents a '.dwz' file. */
845 /* A dwz file can only contain a few sections. */
846 struct dwarf2_section_info abbrev
;
847 struct dwarf2_section_info info
;
848 struct dwarf2_section_info str
;
849 struct dwarf2_section_info line
;
850 struct dwarf2_section_info macro
;
851 struct dwarf2_section_info gdb_index
;
852 struct dwarf2_section_info debug_names
;
858 /* Struct used to pass misc. parameters to read_die_and_children, et
859 al. which are used for both .debug_info and .debug_types dies.
860 All parameters here are unchanging for the life of the call. This
861 struct exists to abstract away the constant parameters of die reading. */
863 struct die_reader_specs
865 /* The bfd of die_section. */
868 /* The CU of the DIE we are parsing. */
869 struct dwarf2_cu
*cu
;
871 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
872 struct dwo_file
*dwo_file
;
874 /* The section the die comes from.
875 This is either .debug_info or .debug_types, or the .dwo variants. */
876 struct dwarf2_section_info
*die_section
;
878 /* die_section->buffer. */
879 const gdb_byte
*buffer
;
881 /* The end of the buffer. */
882 const gdb_byte
*buffer_end
;
884 /* The value of the DW_AT_comp_dir attribute. */
885 const char *comp_dir
;
887 /* The abbreviation table to use when reading the DIEs. */
888 struct abbrev_table
*abbrev_table
;
891 /* Type of function passed to init_cutu_and_read_dies, et.al. */
892 typedef void (die_reader_func_ftype
) (const struct die_reader_specs
*reader
,
893 const gdb_byte
*info_ptr
,
894 struct die_info
*comp_unit_die
,
898 /* A 1-based directory index. This is a strong typedef to prevent
899 accidentally using a directory index as a 0-based index into an
901 enum class dir_index
: unsigned int {};
903 /* Likewise, a 1-based file name index. */
904 enum class file_name_index
: unsigned int {};
908 file_entry () = default;
910 file_entry (const char *name_
, dir_index d_index_
,
911 unsigned int mod_time_
, unsigned int length_
)
914 mod_time (mod_time_
),
918 /* Return the include directory at D_INDEX stored in LH. Returns
919 NULL if D_INDEX is out of bounds. */
920 const char *include_dir (const line_header
*lh
) const;
922 /* The file name. Note this is an observing pointer. The memory is
923 owned by debug_line_buffer. */
926 /* The directory index (1-based). */
927 dir_index d_index
{};
929 unsigned int mod_time
{};
931 unsigned int length
{};
933 /* True if referenced by the Line Number Program. */
936 /* The associated symbol table, if any. */
937 struct symtab
*symtab
{};
940 /* The line number information for a compilation unit (found in the
941 .debug_line section) begins with a "statement program header",
942 which contains the following information. */
949 /* Add an entry to the include directory table. */
950 void add_include_dir (const char *include_dir
);
952 /* Add an entry to the file name table. */
953 void add_file_name (const char *name
, dir_index d_index
,
954 unsigned int mod_time
, unsigned int length
);
956 /* Return the include dir at INDEX (1-based). Returns NULL if INDEX
958 const char *include_dir_at (dir_index index
) const
960 /* Convert directory index number (1-based) to vector index
962 size_t vec_index
= to_underlying (index
) - 1;
964 if (vec_index
>= include_dirs
.size ())
966 return include_dirs
[vec_index
];
969 /* Return the file name at INDEX (1-based). Returns NULL if INDEX
971 file_entry
*file_name_at (file_name_index index
)
973 /* Convert file name index number (1-based) to vector index
975 size_t vec_index
= to_underlying (index
) - 1;
977 if (vec_index
>= file_names
.size ())
979 return &file_names
[vec_index
];
982 /* Const version of the above. */
983 const file_entry
*file_name_at (unsigned int index
) const
985 if (index
>= file_names
.size ())
987 return &file_names
[index
];
990 /* Offset of line number information in .debug_line section. */
991 sect_offset sect_off
{};
993 /* OFFSET is for struct dwz_file associated with dwarf2_per_objfile. */
994 unsigned offset_in_dwz
: 1; /* Can't initialize bitfields in-class. */
996 unsigned int total_length
{};
997 unsigned short version
{};
998 unsigned int header_length
{};
999 unsigned char minimum_instruction_length
{};
1000 unsigned char maximum_ops_per_instruction
{};
1001 unsigned char default_is_stmt
{};
1003 unsigned char line_range
{};
1004 unsigned char opcode_base
{};
1006 /* standard_opcode_lengths[i] is the number of operands for the
1007 standard opcode whose value is i. This means that
1008 standard_opcode_lengths[0] is unused, and the last meaningful
1009 element is standard_opcode_lengths[opcode_base - 1]. */
1010 std::unique_ptr
<unsigned char[]> standard_opcode_lengths
;
1012 /* The include_directories table. Note these are observing
1013 pointers. The memory is owned by debug_line_buffer. */
1014 std::vector
<const char *> include_dirs
;
1016 /* The file_names table. */
1017 std::vector
<file_entry
> file_names
;
1019 /* The start and end of the statement program following this
1020 header. These point into dwarf2_per_objfile->line_buffer. */
1021 const gdb_byte
*statement_program_start
{}, *statement_program_end
{};
1024 typedef std::unique_ptr
<line_header
> line_header_up
;
1027 file_entry::include_dir (const line_header
*lh
) const
1029 return lh
->include_dir_at (d_index
);
1032 /* When we construct a partial symbol table entry we only
1033 need this much information. */
1034 struct partial_die_info
: public allocate_on_obstack
1036 partial_die_info (sect_offset sect_off
, struct abbrev_info
*abbrev
);
1038 /* Disable assign but still keep copy ctor, which is needed
1039 load_partial_dies. */
1040 partial_die_info
& operator=(const partial_die_info
& rhs
) = delete;
1042 /* Adjust the partial die before generating a symbol for it. This
1043 function may set the is_external flag or change the DIE's
1045 void fixup (struct dwarf2_cu
*cu
);
1047 /* Read a minimal amount of information into the minimal die
1049 const gdb_byte
*read (const struct die_reader_specs
*reader
,
1050 const struct abbrev_info
&abbrev
,
1051 const gdb_byte
*info_ptr
);
1053 /* Offset of this DIE. */
1054 const sect_offset sect_off
;
1056 /* DWARF-2 tag for this DIE. */
1057 const ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1059 /* Assorted flags describing the data found in this DIE. */
1060 const unsigned int has_children
: 1;
1062 unsigned int is_external
: 1;
1063 unsigned int is_declaration
: 1;
1064 unsigned int has_type
: 1;
1065 unsigned int has_specification
: 1;
1066 unsigned int has_pc_info
: 1;
1067 unsigned int may_be_inlined
: 1;
1069 /* This DIE has been marked DW_AT_main_subprogram. */
1070 unsigned int main_subprogram
: 1;
1072 /* Flag set if the SCOPE field of this structure has been
1074 unsigned int scope_set
: 1;
1076 /* Flag set if the DIE has a byte_size attribute. */
1077 unsigned int has_byte_size
: 1;
1079 /* Flag set if the DIE has a DW_AT_const_value attribute. */
1080 unsigned int has_const_value
: 1;
1082 /* Flag set if any of the DIE's children are template arguments. */
1083 unsigned int has_template_arguments
: 1;
1085 /* Flag set if fixup has been called on this die. */
1086 unsigned int fixup_called
: 1;
1088 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
1089 unsigned int is_dwz
: 1;
1091 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
1092 unsigned int spec_is_dwz
: 1;
1094 /* The name of this DIE. Normally the value of DW_AT_name, but
1095 sometimes a default name for unnamed DIEs. */
1096 const char *name
= nullptr;
1098 /* The linkage name, if present. */
1099 const char *linkage_name
= nullptr;
1101 /* The scope to prepend to our children. This is generally
1102 allocated on the comp_unit_obstack, so will disappear
1103 when this compilation unit leaves the cache. */
1104 const char *scope
= nullptr;
1106 /* Some data associated with the partial DIE. The tag determines
1107 which field is live. */
1110 /* The location description associated with this DIE, if any. */
1111 struct dwarf_block
*locdesc
;
1112 /* The offset of an import, for DW_TAG_imported_unit. */
1113 sect_offset sect_off
;
1116 /* If HAS_PC_INFO, the PC range associated with this DIE. */
1117 CORE_ADDR lowpc
= 0;
1118 CORE_ADDR highpc
= 0;
1120 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
1121 DW_AT_sibling, if any. */
1122 /* NOTE: This member isn't strictly necessary, partial_die_info::read
1123 could return DW_AT_sibling values to its caller load_partial_dies. */
1124 const gdb_byte
*sibling
= nullptr;
1126 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
1127 DW_AT_specification (or DW_AT_abstract_origin or
1128 DW_AT_extension). */
1129 sect_offset spec_offset
{};
1131 /* Pointers to this DIE's parent, first child, and next sibling,
1133 struct partial_die_info
*die_parent
= nullptr;
1134 struct partial_die_info
*die_child
= nullptr;
1135 struct partial_die_info
*die_sibling
= nullptr;
1137 friend struct partial_die_info
*
1138 dwarf2_cu::find_partial_die (sect_offset sect_off
);
1141 /* Only need to do look up in dwarf2_cu::find_partial_die. */
1142 partial_die_info (sect_offset sect_off
)
1143 : partial_die_info (sect_off
, DW_TAG_padding
, 0)
1147 partial_die_info (sect_offset sect_off_
, enum dwarf_tag tag_
,
1149 : sect_off (sect_off_
), tag (tag_
), has_children (has_children_
)
1154 has_specification
= 0;
1157 main_subprogram
= 0;
1160 has_const_value
= 0;
1161 has_template_arguments
= 0;
1168 /* This data structure holds the information of an abbrev. */
1171 unsigned int number
; /* number identifying abbrev */
1172 enum dwarf_tag tag
; /* dwarf tag */
1173 unsigned short has_children
; /* boolean */
1174 unsigned short num_attrs
; /* number of attributes */
1175 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
1176 struct abbrev_info
*next
; /* next in chain */
1181 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1182 ENUM_BITFIELD(dwarf_form
) form
: 16;
1184 /* It is valid only if FORM is DW_FORM_implicit_const. */
1185 LONGEST implicit_const
;
1188 /* Size of abbrev_table.abbrev_hash_table. */
1189 #define ABBREV_HASH_SIZE 121
1191 /* Top level data structure to contain an abbreviation table. */
1195 explicit abbrev_table (sect_offset off
)
1199 XOBNEWVEC (&abbrev_obstack
, struct abbrev_info
*, ABBREV_HASH_SIZE
);
1200 memset (m_abbrevs
, 0, ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
1203 DISABLE_COPY_AND_ASSIGN (abbrev_table
);
1205 /* Allocate space for a struct abbrev_info object in
1207 struct abbrev_info
*alloc_abbrev ();
1209 /* Add an abbreviation to the table. */
1210 void add_abbrev (unsigned int abbrev_number
, struct abbrev_info
*abbrev
);
1212 /* Look up an abbrev in the table.
1213 Returns NULL if the abbrev is not found. */
1215 struct abbrev_info
*lookup_abbrev (unsigned int abbrev_number
);
1218 /* Where the abbrev table came from.
1219 This is used as a sanity check when the table is used. */
1220 const sect_offset sect_off
;
1222 /* Storage for the abbrev table. */
1223 auto_obstack abbrev_obstack
;
1227 /* Hash table of abbrevs.
1228 This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
1229 It could be statically allocated, but the previous code didn't so we
1231 struct abbrev_info
**m_abbrevs
;
1234 typedef std::unique_ptr
<struct abbrev_table
> abbrev_table_up
;
1236 /* Attributes have a name and a value. */
1239 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1240 ENUM_BITFIELD(dwarf_form
) form
: 15;
1242 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
1243 field should be in u.str (existing only for DW_STRING) but it is kept
1244 here for better struct attribute alignment. */
1245 unsigned int string_is_canonical
: 1;
1250 struct dwarf_block
*blk
;
1259 /* This data structure holds a complete die structure. */
1262 /* DWARF-2 tag for this DIE. */
1263 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1265 /* Number of attributes */
1266 unsigned char num_attrs
;
1268 /* True if we're presently building the full type name for the
1269 type derived from this DIE. */
1270 unsigned char building_fullname
: 1;
1272 /* True if this die is in process. PR 16581. */
1273 unsigned char in_process
: 1;
1276 unsigned int abbrev
;
1278 /* Offset in .debug_info or .debug_types section. */
1279 sect_offset sect_off
;
1281 /* The dies in a compilation unit form an n-ary tree. PARENT
1282 points to this die's parent; CHILD points to the first child of
1283 this node; and all the children of a given node are chained
1284 together via their SIBLING fields. */
1285 struct die_info
*child
; /* Its first child, if any. */
1286 struct die_info
*sibling
; /* Its next sibling, if any. */
1287 struct die_info
*parent
; /* Its parent, if any. */
1289 /* An array of attributes, with NUM_ATTRS elements. There may be
1290 zero, but it's not common and zero-sized arrays are not
1291 sufficiently portable C. */
1292 struct attribute attrs
[1];
1295 /* Get at parts of an attribute structure. */
1297 #define DW_STRING(attr) ((attr)->u.str)
1298 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
1299 #define DW_UNSND(attr) ((attr)->u.unsnd)
1300 #define DW_BLOCK(attr) ((attr)->u.blk)
1301 #define DW_SND(attr) ((attr)->u.snd)
1302 #define DW_ADDR(attr) ((attr)->u.addr)
1303 #define DW_SIGNATURE(attr) ((attr)->u.signature)
1305 /* Blocks are a bunch of untyped bytes. */
1310 /* Valid only if SIZE is not zero. */
1311 const gdb_byte
*data
;
1314 #ifndef ATTR_ALLOC_CHUNK
1315 #define ATTR_ALLOC_CHUNK 4
1318 /* Allocate fields for structs, unions and enums in this size. */
1319 #ifndef DW_FIELD_ALLOC_CHUNK
1320 #define DW_FIELD_ALLOC_CHUNK 4
1323 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1324 but this would require a corresponding change in unpack_field_as_long
1326 static int bits_per_byte
= 8;
1328 /* When reading a variant or variant part, we track a bit more
1329 information about the field, and store it in an object of this
1332 struct variant_field
1334 /* If we see a DW_TAG_variant, then this will be the discriminant
1336 ULONGEST discriminant_value
;
1337 /* If we see a DW_TAG_variant, then this will be set if this is the
1339 bool default_branch
;
1340 /* While reading a DW_TAG_variant_part, this will be set if this
1341 field is the discriminant. */
1342 bool is_discriminant
;
1347 int accessibility
= 0;
1349 /* Extra information to describe a variant or variant part. */
1350 struct variant_field variant
{};
1351 struct field field
{};
1356 const char *name
= nullptr;
1357 std::vector
<struct fn_field
> fnfields
;
1360 /* The routines that read and process dies for a C struct or C++ class
1361 pass lists of data member fields and lists of member function fields
1362 in an instance of a field_info structure, as defined below. */
1365 /* List of data member and baseclasses fields. */
1366 std::vector
<struct nextfield
> fields
;
1367 std::vector
<struct nextfield
> baseclasses
;
1369 /* Number of fields (including baseclasses). */
1372 /* Set if the accesibility of one of the fields is not public. */
1373 int non_public_fields
= 0;
1375 /* Member function fieldlist array, contains name of possibly overloaded
1376 member function, number of overloaded member functions and a pointer
1377 to the head of the member function field chain. */
1378 std::vector
<struct fnfieldlist
> fnfieldlists
;
1380 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1381 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1382 std::vector
<struct decl_field
> typedef_field_list
;
1384 /* Nested types defined by this class and the number of elements in this
1386 std::vector
<struct decl_field
> nested_types_list
;
1389 /* One item on the queue of compilation units to read in full symbols
1391 struct dwarf2_queue_item
1393 struct dwarf2_per_cu_data
*per_cu
;
1394 enum language pretend_language
;
1395 struct dwarf2_queue_item
*next
;
1398 /* The current queue. */
1399 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
1401 /* Loaded secondary compilation units are kept in memory until they
1402 have not been referenced for the processing of this many
1403 compilation units. Set this to zero to disable caching. Cache
1404 sizes of up to at least twenty will improve startup time for
1405 typical inter-CU-reference binaries, at an obvious memory cost. */
1406 static int dwarf_max_cache_age
= 5;
1408 show_dwarf_max_cache_age (struct ui_file
*file
, int from_tty
,
1409 struct cmd_list_element
*c
, const char *value
)
1411 fprintf_filtered (file
, _("The upper bound on the age of cached "
1412 "DWARF compilation units is %s.\n"),
1416 /* local function prototypes */
1418 static const char *get_section_name (const struct dwarf2_section_info
*);
1420 static const char *get_section_file_name (const struct dwarf2_section_info
*);
1422 static void dwarf2_find_base_address (struct die_info
*die
,
1423 struct dwarf2_cu
*cu
);
1425 static struct partial_symtab
*create_partial_symtab
1426 (struct dwarf2_per_cu_data
*per_cu
, const char *name
);
1428 static void build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
1429 const gdb_byte
*info_ptr
,
1430 struct die_info
*type_unit_die
,
1431 int has_children
, void *data
);
1433 static void dwarf2_build_psymtabs_hard
1434 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1436 static void scan_partial_symbols (struct partial_die_info
*,
1437 CORE_ADDR
*, CORE_ADDR
*,
1438 int, struct dwarf2_cu
*);
1440 static void add_partial_symbol (struct partial_die_info
*,
1441 struct dwarf2_cu
*);
1443 static void add_partial_namespace (struct partial_die_info
*pdi
,
1444 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1445 int set_addrmap
, struct dwarf2_cu
*cu
);
1447 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1448 CORE_ADDR
*highpc
, int set_addrmap
,
1449 struct dwarf2_cu
*cu
);
1451 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1452 struct dwarf2_cu
*cu
);
1454 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1455 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1456 int need_pc
, struct dwarf2_cu
*cu
);
1458 static void dwarf2_read_symtab (struct partial_symtab
*,
1461 static void psymtab_to_symtab_1 (struct partial_symtab
*);
1463 static abbrev_table_up abbrev_table_read_table
1464 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, struct dwarf2_section_info
*,
1467 static unsigned int peek_abbrev_code (bfd
*, const gdb_byte
*);
1469 static struct partial_die_info
*load_partial_dies
1470 (const struct die_reader_specs
*, const gdb_byte
*, int);
1472 static struct partial_die_info
*find_partial_die (sect_offset
, int,
1473 struct dwarf2_cu
*);
1475 static const gdb_byte
*read_attribute (const struct die_reader_specs
*,
1476 struct attribute
*, struct attr_abbrev
*,
1479 static unsigned int read_1_byte (bfd
*, const gdb_byte
*);
1481 static int read_1_signed_byte (bfd
*, const gdb_byte
*);
1483 static unsigned int read_2_bytes (bfd
*, const gdb_byte
*);
1485 static unsigned int read_4_bytes (bfd
*, const gdb_byte
*);
1487 static ULONGEST
read_8_bytes (bfd
*, const gdb_byte
*);
1489 static CORE_ADDR
read_address (bfd
*, const gdb_byte
*ptr
, struct dwarf2_cu
*,
1492 static LONGEST
read_initial_length (bfd
*, const gdb_byte
*, unsigned int *);
1494 static LONGEST read_checked_initial_length_and_offset
1495 (bfd
*, const gdb_byte
*, const struct comp_unit_head
*,
1496 unsigned int *, unsigned int *);
1498 static LONGEST
read_offset (bfd
*, const gdb_byte
*,
1499 const struct comp_unit_head
*,
1502 static LONGEST
read_offset_1 (bfd
*, const gdb_byte
*, unsigned int);
1504 static sect_offset read_abbrev_offset
1505 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1506 struct dwarf2_section_info
*, sect_offset
);
1508 static const gdb_byte
*read_n_bytes (bfd
*, const gdb_byte
*, unsigned int);
1510 static const char *read_direct_string (bfd
*, const gdb_byte
*, unsigned int *);
1512 static const char *read_indirect_string
1513 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*, const gdb_byte
*,
1514 const struct comp_unit_head
*, unsigned int *);
1516 static const char *read_indirect_line_string
1517 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*, const gdb_byte
*,
1518 const struct comp_unit_head
*, unsigned int *);
1520 static const char *read_indirect_string_at_offset
1521 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
1522 LONGEST str_offset
);
1524 static const char *read_indirect_string_from_dwz
1525 (struct objfile
*objfile
, struct dwz_file
*, LONGEST
);
1527 static LONGEST
read_signed_leb128 (bfd
*, const gdb_byte
*, unsigned int *);
1529 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*,
1533 static const char *read_str_index (const struct die_reader_specs
*reader
,
1534 ULONGEST str_index
);
1536 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1538 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1539 struct dwarf2_cu
*);
1541 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
1544 static const char *dwarf2_string_attr (struct die_info
*die
, unsigned int name
,
1545 struct dwarf2_cu
*cu
);
1547 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1548 struct dwarf2_cu
*cu
);
1550 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1552 static struct die_info
*die_specification (struct die_info
*die
,
1553 struct dwarf2_cu
**);
1555 static line_header_up
dwarf_decode_line_header (sect_offset sect_off
,
1556 struct dwarf2_cu
*cu
);
1558 static void dwarf_decode_lines (struct line_header
*, const char *,
1559 struct dwarf2_cu
*, struct partial_symtab
*,
1560 CORE_ADDR
, int decode_mapping
);
1562 static void dwarf2_start_subfile (const char *, const char *);
1564 static struct compunit_symtab
*dwarf2_start_symtab (struct dwarf2_cu
*,
1565 const char *, const char *,
1568 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1569 struct dwarf2_cu
*, struct symbol
* = NULL
);
1571 static void dwarf2_const_value (const struct attribute
*, struct symbol
*,
1572 struct dwarf2_cu
*);
1574 static void dwarf2_const_value_attr (const struct attribute
*attr
,
1577 struct obstack
*obstack
,
1578 struct dwarf2_cu
*cu
, LONGEST
*value
,
1579 const gdb_byte
**bytes
,
1580 struct dwarf2_locexpr_baton
**baton
);
1582 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1584 static int need_gnat_info (struct dwarf2_cu
*);
1586 static struct type
*die_descriptive_type (struct die_info
*,
1587 struct dwarf2_cu
*);
1589 static void set_descriptive_type (struct type
*, struct die_info
*,
1590 struct dwarf2_cu
*);
1592 static struct type
*die_containing_type (struct die_info
*,
1593 struct dwarf2_cu
*);
1595 static struct type
*lookup_die_type (struct die_info
*, const struct attribute
*,
1596 struct dwarf2_cu
*);
1598 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1600 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1602 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1604 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1605 const char *suffix
, int physname
,
1606 struct dwarf2_cu
*cu
);
1608 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1610 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1612 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1614 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1616 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1618 static void read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
);
1620 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1621 struct dwarf2_cu
*, struct partial_symtab
*);
1623 /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return
1624 values. Keep the items ordered with increasing constraints compliance. */
1627 /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */
1628 PC_BOUNDS_NOT_PRESENT
,
1630 /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges
1631 were present but they do not form a valid range of PC addresses. */
1634 /* Discontiguous range was found - that is DW_AT_ranges was found. */
1637 /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */
1641 static enum pc_bounds_kind
dwarf2_get_pc_bounds (struct die_info
*,
1642 CORE_ADDR
*, CORE_ADDR
*,
1644 struct partial_symtab
*);
1646 static void get_scope_pc_bounds (struct die_info
*,
1647 CORE_ADDR
*, CORE_ADDR
*,
1648 struct dwarf2_cu
*);
1650 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1651 CORE_ADDR
, struct dwarf2_cu
*);
1653 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1654 struct dwarf2_cu
*);
1656 static void dwarf2_attach_fields_to_type (struct field_info
*,
1657 struct type
*, struct dwarf2_cu
*);
1659 static void dwarf2_add_member_fn (struct field_info
*,
1660 struct die_info
*, struct type
*,
1661 struct dwarf2_cu
*);
1663 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1665 struct dwarf2_cu
*);
1667 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1669 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1671 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1673 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1675 static struct using_direct
**using_directives (enum language
);
1677 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1679 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1681 static struct type
*read_module_type (struct die_info
*die
,
1682 struct dwarf2_cu
*cu
);
1684 static const char *namespace_name (struct die_info
*die
,
1685 int *is_anonymous
, struct dwarf2_cu
*);
1687 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1689 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1691 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1692 struct dwarf2_cu
*);
1694 static struct die_info
*read_die_and_siblings_1
1695 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1698 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1699 const gdb_byte
*info_ptr
,
1700 const gdb_byte
**new_info_ptr
,
1701 struct die_info
*parent
);
1703 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1704 struct die_info
**, const gdb_byte
*,
1707 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1708 struct die_info
**, const gdb_byte
*,
1711 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1713 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1716 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1718 static const char *dwarf2_full_name (const char *name
,
1719 struct die_info
*die
,
1720 struct dwarf2_cu
*cu
);
1722 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1723 struct dwarf2_cu
*cu
);
1725 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1726 struct dwarf2_cu
**);
1728 static const char *dwarf_tag_name (unsigned int);
1730 static const char *dwarf_attr_name (unsigned int);
1732 static const char *dwarf_form_name (unsigned int);
1734 static const char *dwarf_bool_name (unsigned int);
1736 static const char *dwarf_type_encoding_name (unsigned int);
1738 static struct die_info
*sibling_die (struct die_info
*);
1740 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1742 static void dump_die_for_error (struct die_info
*);
1744 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1747 /*static*/ void dump_die (struct die_info
*, int max_level
);
1749 static void store_in_ref_table (struct die_info
*,
1750 struct dwarf2_cu
*);
1752 static sect_offset
dwarf2_get_ref_die_offset (const struct attribute
*);
1754 static LONGEST
dwarf2_get_attr_constant_value (const struct attribute
*, int);
1756 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1757 const struct attribute
*,
1758 struct dwarf2_cu
**);
1760 static struct die_info
*follow_die_ref (struct die_info
*,
1761 const struct attribute
*,
1762 struct dwarf2_cu
**);
1764 static struct die_info
*follow_die_sig (struct die_info
*,
1765 const struct attribute
*,
1766 struct dwarf2_cu
**);
1768 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1769 struct dwarf2_cu
*);
1771 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1772 const struct attribute
*,
1773 struct dwarf2_cu
*);
1775 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1777 static void read_signatured_type (struct signatured_type
*);
1779 static int attr_to_dynamic_prop (const struct attribute
*attr
,
1780 struct die_info
*die
, struct dwarf2_cu
*cu
,
1781 struct dynamic_prop
*prop
);
1783 /* memory allocation interface */
1785 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1787 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1789 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1791 static int attr_form_is_block (const struct attribute
*);
1793 static int attr_form_is_section_offset (const struct attribute
*);
1795 static int attr_form_is_constant (const struct attribute
*);
1797 static int attr_form_is_ref (const struct attribute
*);
1799 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1800 struct dwarf2_loclist_baton
*baton
,
1801 const struct attribute
*attr
);
1803 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1805 struct dwarf2_cu
*cu
,
1808 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1809 const gdb_byte
*info_ptr
,
1810 struct abbrev_info
*abbrev
);
1812 static hashval_t
partial_die_hash (const void *item
);
1814 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1816 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1817 (sect_offset sect_off
, unsigned int offset_in_dwz
,
1818 struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1820 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1821 struct die_info
*comp_unit_die
,
1822 enum language pretend_language
);
1824 static void age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1826 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1828 static struct type
*set_die_type (struct die_info
*, struct type
*,
1829 struct dwarf2_cu
*);
1831 static void create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1833 static int create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1835 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1838 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1841 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1844 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1845 struct dwarf2_per_cu_data
*);
1847 static void dwarf2_mark (struct dwarf2_cu
*);
1849 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1851 static struct type
*get_die_type_at_offset (sect_offset
,
1852 struct dwarf2_per_cu_data
*);
1854 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1856 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1857 enum language pretend_language
);
1859 static void process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1861 /* Class, the destructor of which frees all allocated queue entries. This
1862 will only have work to do if an error was thrown while processing the
1863 dwarf. If no error was thrown then the queue entries should have all
1864 been processed, and freed, as we went along. */
1866 class dwarf2_queue_guard
1869 dwarf2_queue_guard () = default;
1871 /* Free any entries remaining on the queue. There should only be
1872 entries left if we hit an error while processing the dwarf. */
1873 ~dwarf2_queue_guard ()
1875 struct dwarf2_queue_item
*item
, *last
;
1877 item
= dwarf2_queue
;
1880 /* Anything still marked queued is likely to be in an
1881 inconsistent state, so discard it. */
1882 if (item
->per_cu
->queued
)
1884 if (item
->per_cu
->cu
!= NULL
)
1885 free_one_cached_comp_unit (item
->per_cu
);
1886 item
->per_cu
->queued
= 0;
1894 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
1898 /* The return type of find_file_and_directory. Note, the enclosed
1899 string pointers are only valid while this object is valid. */
1901 struct file_and_directory
1903 /* The filename. This is never NULL. */
1906 /* The compilation directory. NULL if not known. If we needed to
1907 compute a new string, this points to COMP_DIR_STORAGE, otherwise,
1908 points directly to the DW_AT_comp_dir string attribute owned by
1909 the obstack that owns the DIE. */
1910 const char *comp_dir
;
1912 /* If we needed to build a new string for comp_dir, this is what
1913 owns the storage. */
1914 std::string comp_dir_storage
;
1917 static file_and_directory
find_file_and_directory (struct die_info
*die
,
1918 struct dwarf2_cu
*cu
);
1920 static char *file_full_name (int file
, struct line_header
*lh
,
1921 const char *comp_dir
);
1923 /* Expected enum dwarf_unit_type for read_comp_unit_head. */
1924 enum class rcuh_kind
{ COMPILE
, TYPE
};
1926 static const gdb_byte
*read_and_check_comp_unit_head
1927 (struct dwarf2_per_objfile
* dwarf2_per_objfile
,
1928 struct comp_unit_head
*header
,
1929 struct dwarf2_section_info
*section
,
1930 struct dwarf2_section_info
*abbrev_section
, const gdb_byte
*info_ptr
,
1931 rcuh_kind section_kind
);
1933 static void init_cutu_and_read_dies
1934 (struct dwarf2_per_cu_data
*this_cu
, struct abbrev_table
*abbrev_table
,
1935 int use_existing_cu
, int keep
,
1936 die_reader_func_ftype
*die_reader_func
, void *data
);
1938 static void init_cutu_and_read_dies_simple
1939 (struct dwarf2_per_cu_data
*this_cu
,
1940 die_reader_func_ftype
*die_reader_func
, void *data
);
1942 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1944 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
1946 static struct dwo_unit
*lookup_dwo_unit_in_dwp
1947 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1948 struct dwp_file
*dwp_file
, const char *comp_dir
,
1949 ULONGEST signature
, int is_debug_types
);
1951 static struct dwp_file
*get_dwp_file
1952 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1954 static struct dwo_unit
*lookup_dwo_comp_unit
1955 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
1957 static struct dwo_unit
*lookup_dwo_type_unit
1958 (struct signatured_type
*, const char *, const char *);
1960 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
1962 static void free_dwo_file (struct dwo_file
*);
1964 /* A unique_ptr helper to free a dwo_file. */
1966 struct dwo_file_deleter
1968 void operator() (struct dwo_file
*df
) const
1974 /* A unique pointer to a dwo_file. */
1976 typedef std::unique_ptr
<struct dwo_file
, dwo_file_deleter
> dwo_file_up
;
1978 static void process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1980 static void check_producer (struct dwarf2_cu
*cu
);
1982 static void free_line_header_voidp (void *arg
);
1984 /* Various complaints about symbol reading that don't abort the process. */
1987 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
1989 complaint (&symfile_complaints
,
1990 _("statement list doesn't fit in .debug_line section"));
1994 dwarf2_debug_line_missing_file_complaint (void)
1996 complaint (&symfile_complaints
,
1997 _(".debug_line section has line data without a file"));
2001 dwarf2_debug_line_missing_end_sequence_complaint (void)
2003 complaint (&symfile_complaints
,
2004 _(".debug_line section has line "
2005 "program sequence without an end"));
2009 dwarf2_complex_location_expr_complaint (void)
2011 complaint (&symfile_complaints
, _("location expression too complex"));
2015 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
2018 complaint (&symfile_complaints
,
2019 _("const value length mismatch for '%s', got %d, expected %d"),
2024 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
2026 complaint (&symfile_complaints
,
2027 _("debug info runs off end of %s section"
2029 get_section_name (section
),
2030 get_section_file_name (section
));
2034 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
2036 complaint (&symfile_complaints
,
2037 _("macro debug info contains a "
2038 "malformed macro definition:\n`%s'"),
2043 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
2045 complaint (&symfile_complaints
,
2046 _("invalid attribute class or form for '%s' in '%s'"),
2050 /* Hash function for line_header_hash. */
2053 line_header_hash (const struct line_header
*ofs
)
2055 return to_underlying (ofs
->sect_off
) ^ ofs
->offset_in_dwz
;
2058 /* Hash function for htab_create_alloc_ex for line_header_hash. */
2061 line_header_hash_voidp (const void *item
)
2063 const struct line_header
*ofs
= (const struct line_header
*) item
;
2065 return line_header_hash (ofs
);
2068 /* Equality function for line_header_hash. */
2071 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
2073 const struct line_header
*ofs_lhs
= (const struct line_header
*) item_lhs
;
2074 const struct line_header
*ofs_rhs
= (const struct line_header
*) item_rhs
;
2076 return (ofs_lhs
->sect_off
== ofs_rhs
->sect_off
2077 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
2082 /* Read the given attribute value as an address, taking the attribute's
2083 form into account. */
2086 attr_value_as_address (struct attribute
*attr
)
2090 if (attr
->form
!= DW_FORM_addr
&& attr
->form
!= DW_FORM_GNU_addr_index
)
2092 /* Aside from a few clearly defined exceptions, attributes that
2093 contain an address must always be in DW_FORM_addr form.
2094 Unfortunately, some compilers happen to be violating this
2095 requirement by encoding addresses using other forms, such
2096 as DW_FORM_data4 for example. For those broken compilers,
2097 we try to do our best, without any guarantee of success,
2098 to interpret the address correctly. It would also be nice
2099 to generate a complaint, but that would require us to maintain
2100 a list of legitimate cases where a non-address form is allowed,
2101 as well as update callers to pass in at least the CU's DWARF
2102 version. This is more overhead than what we're willing to
2103 expand for a pretty rare case. */
2104 addr
= DW_UNSND (attr
);
2107 addr
= DW_ADDR (attr
);
2112 /* See declaration. */
2114 dwarf2_per_objfile::dwarf2_per_objfile (struct objfile
*objfile_
,
2115 const dwarf2_debug_sections
*names
)
2116 : objfile (objfile_
)
2119 names
= &dwarf2_elf_names
;
2121 bfd
*obfd
= objfile
->obfd
;
2123 for (asection
*sec
= obfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
2124 locate_sections (obfd
, sec
, *names
);
2127 static void free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
);
2129 dwarf2_per_objfile::~dwarf2_per_objfile ()
2131 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
2132 free_cached_comp_units ();
2134 if (quick_file_names_table
)
2135 htab_delete (quick_file_names_table
);
2137 if (line_header_hash
)
2138 htab_delete (line_header_hash
);
2140 for (dwarf2_per_cu_data
*per_cu
: all_comp_units
)
2141 VEC_free (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
);
2143 for (signatured_type
*sig_type
: all_type_units
)
2144 VEC_free (dwarf2_per_cu_ptr
, sig_type
->per_cu
.imported_symtabs
);
2146 VEC_free (dwarf2_section_info_def
, types
);
2148 if (dwo_files
!= NULL
)
2149 free_dwo_files (dwo_files
, objfile
);
2150 if (dwp_file
!= NULL
)
2151 gdb_bfd_unref (dwp_file
->dbfd
);
2153 if (dwz_file
!= NULL
&& dwz_file
->dwz_bfd
)
2154 gdb_bfd_unref (dwz_file
->dwz_bfd
);
2156 if (index_table
!= NULL
)
2157 index_table
->~mapped_index ();
2159 /* Everything else should be on the objfile obstack. */
2162 /* See declaration. */
2165 dwarf2_per_objfile::free_cached_comp_units ()
2167 dwarf2_per_cu_data
*per_cu
= read_in_chain
;
2168 dwarf2_per_cu_data
**last_chain
= &read_in_chain
;
2169 while (per_cu
!= NULL
)
2171 dwarf2_per_cu_data
*next_cu
= per_cu
->cu
->read_in_chain
;
2174 *last_chain
= next_cu
;
2179 /* A helper class that calls free_cached_comp_units on
2182 class free_cached_comp_units
2186 explicit free_cached_comp_units (dwarf2_per_objfile
*per_objfile
)
2187 : m_per_objfile (per_objfile
)
2191 ~free_cached_comp_units ()
2193 m_per_objfile
->free_cached_comp_units ();
2196 DISABLE_COPY_AND_ASSIGN (free_cached_comp_units
);
2200 dwarf2_per_objfile
*m_per_objfile
;
2203 /* Try to locate the sections we need for DWARF 2 debugging
2204 information and return true if we have enough to do something.
2205 NAMES points to the dwarf2 section names, or is NULL if the standard
2206 ELF names are used. */
2209 dwarf2_has_info (struct objfile
*objfile
,
2210 const struct dwarf2_debug_sections
*names
)
2212 if (objfile
->flags
& OBJF_READNEVER
)
2215 struct dwarf2_per_objfile
*dwarf2_per_objfile
2216 = get_dwarf2_per_objfile (objfile
);
2218 if (dwarf2_per_objfile
== NULL
)
2220 /* Initialize per-objfile state. */
2222 = new (&objfile
->objfile_obstack
) struct dwarf2_per_objfile (objfile
,
2224 set_dwarf2_per_objfile (objfile
, dwarf2_per_objfile
);
2226 return (!dwarf2_per_objfile
->info
.is_virtual
2227 && dwarf2_per_objfile
->info
.s
.section
!= NULL
2228 && !dwarf2_per_objfile
->abbrev
.is_virtual
2229 && dwarf2_per_objfile
->abbrev
.s
.section
!= NULL
);
2232 /* Return the containing section of virtual section SECTION. */
2234 static struct dwarf2_section_info
*
2235 get_containing_section (const struct dwarf2_section_info
*section
)
2237 gdb_assert (section
->is_virtual
);
2238 return section
->s
.containing_section
;
2241 /* Return the bfd owner of SECTION. */
2244 get_section_bfd_owner (const struct dwarf2_section_info
*section
)
2246 if (section
->is_virtual
)
2248 section
= get_containing_section (section
);
2249 gdb_assert (!section
->is_virtual
);
2251 return section
->s
.section
->owner
;
2254 /* Return the bfd section of SECTION.
2255 Returns NULL if the section is not present. */
2258 get_section_bfd_section (const struct dwarf2_section_info
*section
)
2260 if (section
->is_virtual
)
2262 section
= get_containing_section (section
);
2263 gdb_assert (!section
->is_virtual
);
2265 return section
->s
.section
;
2268 /* Return the name of SECTION. */
2271 get_section_name (const struct dwarf2_section_info
*section
)
2273 asection
*sectp
= get_section_bfd_section (section
);
2275 gdb_assert (sectp
!= NULL
);
2276 return bfd_section_name (get_section_bfd_owner (section
), sectp
);
2279 /* Return the name of the file SECTION is in. */
2282 get_section_file_name (const struct dwarf2_section_info
*section
)
2284 bfd
*abfd
= get_section_bfd_owner (section
);
2286 return bfd_get_filename (abfd
);
2289 /* Return the id of SECTION.
2290 Returns 0 if SECTION doesn't exist. */
2293 get_section_id (const struct dwarf2_section_info
*section
)
2295 asection
*sectp
= get_section_bfd_section (section
);
2302 /* Return the flags of SECTION.
2303 SECTION (or containing section if this is a virtual section) must exist. */
2306 get_section_flags (const struct dwarf2_section_info
*section
)
2308 asection
*sectp
= get_section_bfd_section (section
);
2310 gdb_assert (sectp
!= NULL
);
2311 return bfd_get_section_flags (sectp
->owner
, sectp
);
2314 /* When loading sections, we look either for uncompressed section or for
2315 compressed section names. */
2318 section_is_p (const char *section_name
,
2319 const struct dwarf2_section_names
*names
)
2321 if (names
->normal
!= NULL
2322 && strcmp (section_name
, names
->normal
) == 0)
2324 if (names
->compressed
!= NULL
2325 && strcmp (section_name
, names
->compressed
) == 0)
2330 /* See declaration. */
2333 dwarf2_per_objfile::locate_sections (bfd
*abfd
, asection
*sectp
,
2334 const dwarf2_debug_sections
&names
)
2336 flagword aflag
= bfd_get_section_flags (abfd
, sectp
);
2338 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
2341 else if (section_is_p (sectp
->name
, &names
.info
))
2343 this->info
.s
.section
= sectp
;
2344 this->info
.size
= bfd_get_section_size (sectp
);
2346 else if (section_is_p (sectp
->name
, &names
.abbrev
))
2348 this->abbrev
.s
.section
= sectp
;
2349 this->abbrev
.size
= bfd_get_section_size (sectp
);
2351 else if (section_is_p (sectp
->name
, &names
.line
))
2353 this->line
.s
.section
= sectp
;
2354 this->line
.size
= bfd_get_section_size (sectp
);
2356 else if (section_is_p (sectp
->name
, &names
.loc
))
2358 this->loc
.s
.section
= sectp
;
2359 this->loc
.size
= bfd_get_section_size (sectp
);
2361 else if (section_is_p (sectp
->name
, &names
.loclists
))
2363 this->loclists
.s
.section
= sectp
;
2364 this->loclists
.size
= bfd_get_section_size (sectp
);
2366 else if (section_is_p (sectp
->name
, &names
.macinfo
))
2368 this->macinfo
.s
.section
= sectp
;
2369 this->macinfo
.size
= bfd_get_section_size (sectp
);
2371 else if (section_is_p (sectp
->name
, &names
.macro
))
2373 this->macro
.s
.section
= sectp
;
2374 this->macro
.size
= bfd_get_section_size (sectp
);
2376 else if (section_is_p (sectp
->name
, &names
.str
))
2378 this->str
.s
.section
= sectp
;
2379 this->str
.size
= bfd_get_section_size (sectp
);
2381 else if (section_is_p (sectp
->name
, &names
.line_str
))
2383 this->line_str
.s
.section
= sectp
;
2384 this->line_str
.size
= bfd_get_section_size (sectp
);
2386 else if (section_is_p (sectp
->name
, &names
.addr
))
2388 this->addr
.s
.section
= sectp
;
2389 this->addr
.size
= bfd_get_section_size (sectp
);
2391 else if (section_is_p (sectp
->name
, &names
.frame
))
2393 this->frame
.s
.section
= sectp
;
2394 this->frame
.size
= bfd_get_section_size (sectp
);
2396 else if (section_is_p (sectp
->name
, &names
.eh_frame
))
2398 this->eh_frame
.s
.section
= sectp
;
2399 this->eh_frame
.size
= bfd_get_section_size (sectp
);
2401 else if (section_is_p (sectp
->name
, &names
.ranges
))
2403 this->ranges
.s
.section
= sectp
;
2404 this->ranges
.size
= bfd_get_section_size (sectp
);
2406 else if (section_is_p (sectp
->name
, &names
.rnglists
))
2408 this->rnglists
.s
.section
= sectp
;
2409 this->rnglists
.size
= bfd_get_section_size (sectp
);
2411 else if (section_is_p (sectp
->name
, &names
.types
))
2413 struct dwarf2_section_info type_section
;
2415 memset (&type_section
, 0, sizeof (type_section
));
2416 type_section
.s
.section
= sectp
;
2417 type_section
.size
= bfd_get_section_size (sectp
);
2419 VEC_safe_push (dwarf2_section_info_def
, this->types
,
2422 else if (section_is_p (sectp
->name
, &names
.gdb_index
))
2424 this->gdb_index
.s
.section
= sectp
;
2425 this->gdb_index
.size
= bfd_get_section_size (sectp
);
2427 else if (section_is_p (sectp
->name
, &names
.debug_names
))
2429 this->debug_names
.s
.section
= sectp
;
2430 this->debug_names
.size
= bfd_get_section_size (sectp
);
2432 else if (section_is_p (sectp
->name
, &names
.debug_aranges
))
2434 this->debug_aranges
.s
.section
= sectp
;
2435 this->debug_aranges
.size
= bfd_get_section_size (sectp
);
2438 if ((bfd_get_section_flags (abfd
, sectp
) & (SEC_LOAD
| SEC_ALLOC
))
2439 && bfd_section_vma (abfd
, sectp
) == 0)
2440 this->has_section_at_zero
= true;
2443 /* A helper function that decides whether a section is empty,
2447 dwarf2_section_empty_p (const struct dwarf2_section_info
*section
)
2449 if (section
->is_virtual
)
2450 return section
->size
== 0;
2451 return section
->s
.section
== NULL
|| section
->size
== 0;
2454 /* See dwarf2read.h. */
2457 dwarf2_read_section (struct objfile
*objfile
, dwarf2_section_info
*info
)
2461 gdb_byte
*buf
, *retbuf
;
2465 info
->buffer
= NULL
;
2468 if (dwarf2_section_empty_p (info
))
2471 sectp
= get_section_bfd_section (info
);
2473 /* If this is a virtual section we need to read in the real one first. */
2474 if (info
->is_virtual
)
2476 struct dwarf2_section_info
*containing_section
=
2477 get_containing_section (info
);
2479 gdb_assert (sectp
!= NULL
);
2480 if ((sectp
->flags
& SEC_RELOC
) != 0)
2482 error (_("Dwarf Error: DWP format V2 with relocations is not"
2483 " supported in section %s [in module %s]"),
2484 get_section_name (info
), get_section_file_name (info
));
2486 dwarf2_read_section (objfile
, containing_section
);
2487 /* Other code should have already caught virtual sections that don't
2489 gdb_assert (info
->virtual_offset
+ info
->size
2490 <= containing_section
->size
);
2491 /* If the real section is empty or there was a problem reading the
2492 section we shouldn't get here. */
2493 gdb_assert (containing_section
->buffer
!= NULL
);
2494 info
->buffer
= containing_section
->buffer
+ info
->virtual_offset
;
2498 /* If the section has relocations, we must read it ourselves.
2499 Otherwise we attach it to the BFD. */
2500 if ((sectp
->flags
& SEC_RELOC
) == 0)
2502 info
->buffer
= gdb_bfd_map_section (sectp
, &info
->size
);
2506 buf
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
2509 /* When debugging .o files, we may need to apply relocations; see
2510 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
2511 We never compress sections in .o files, so we only need to
2512 try this when the section is not compressed. */
2513 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
2516 info
->buffer
= retbuf
;
2520 abfd
= get_section_bfd_owner (info
);
2521 gdb_assert (abfd
!= NULL
);
2523 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
2524 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
2526 error (_("Dwarf Error: Can't read DWARF data"
2527 " in section %s [in module %s]"),
2528 bfd_section_name (abfd
, sectp
), bfd_get_filename (abfd
));
2532 /* A helper function that returns the size of a section in a safe way.
2533 If you are positive that the section has been read before using the
2534 size, then it is safe to refer to the dwarf2_section_info object's
2535 "size" field directly. In other cases, you must call this
2536 function, because for compressed sections the size field is not set
2537 correctly until the section has been read. */
2539 static bfd_size_type
2540 dwarf2_section_size (struct objfile
*objfile
,
2541 struct dwarf2_section_info
*info
)
2544 dwarf2_read_section (objfile
, info
);
2548 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2552 dwarf2_get_section_info (struct objfile
*objfile
,
2553 enum dwarf2_section_enum sect
,
2554 asection
**sectp
, const gdb_byte
**bufp
,
2555 bfd_size_type
*sizep
)
2557 struct dwarf2_per_objfile
*data
2558 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
2559 dwarf2_objfile_data_key
);
2560 struct dwarf2_section_info
*info
;
2562 /* We may see an objfile without any DWARF, in which case we just
2573 case DWARF2_DEBUG_FRAME
:
2574 info
= &data
->frame
;
2576 case DWARF2_EH_FRAME
:
2577 info
= &data
->eh_frame
;
2580 gdb_assert_not_reached ("unexpected section");
2583 dwarf2_read_section (objfile
, info
);
2585 *sectp
= get_section_bfd_section (info
);
2586 *bufp
= info
->buffer
;
2587 *sizep
= info
->size
;
2590 /* A helper function to find the sections for a .dwz file. */
2593 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2595 struct dwz_file
*dwz_file
= (struct dwz_file
*) arg
;
2597 /* Note that we only support the standard ELF names, because .dwz
2598 is ELF-only (at the time of writing). */
2599 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2601 dwz_file
->abbrev
.s
.section
= sectp
;
2602 dwz_file
->abbrev
.size
= bfd_get_section_size (sectp
);
2604 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2606 dwz_file
->info
.s
.section
= sectp
;
2607 dwz_file
->info
.size
= bfd_get_section_size (sectp
);
2609 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2611 dwz_file
->str
.s
.section
= sectp
;
2612 dwz_file
->str
.size
= bfd_get_section_size (sectp
);
2614 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2616 dwz_file
->line
.s
.section
= sectp
;
2617 dwz_file
->line
.size
= bfd_get_section_size (sectp
);
2619 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2621 dwz_file
->macro
.s
.section
= sectp
;
2622 dwz_file
->macro
.size
= bfd_get_section_size (sectp
);
2624 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2626 dwz_file
->gdb_index
.s
.section
= sectp
;
2627 dwz_file
->gdb_index
.size
= bfd_get_section_size (sectp
);
2629 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.debug_names
))
2631 dwz_file
->debug_names
.s
.section
= sectp
;
2632 dwz_file
->debug_names
.size
= bfd_get_section_size (sectp
);
2636 /* Open the separate '.dwz' debug file, if needed. Return NULL if
2637 there is no .gnu_debugaltlink section in the file. Error if there
2638 is such a section but the file cannot be found. */
2640 static struct dwz_file
*
2641 dwarf2_get_dwz_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
2643 const char *filename
;
2644 struct dwz_file
*result
;
2645 bfd_size_type buildid_len_arg
;
2649 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2650 return dwarf2_per_objfile
->dwz_file
;
2652 bfd_set_error (bfd_error_no_error
);
2653 gdb::unique_xmalloc_ptr
<char> data
2654 (bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2655 &buildid_len_arg
, &buildid
));
2658 if (bfd_get_error () == bfd_error_no_error
)
2660 error (_("could not read '.gnu_debugaltlink' section: %s"),
2661 bfd_errmsg (bfd_get_error ()));
2664 gdb::unique_xmalloc_ptr
<bfd_byte
> buildid_holder (buildid
);
2666 buildid_len
= (size_t) buildid_len_arg
;
2668 filename
= data
.get ();
2670 std::string abs_storage
;
2671 if (!IS_ABSOLUTE_PATH (filename
))
2673 gdb::unique_xmalloc_ptr
<char> abs
2674 = gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2676 abs_storage
= ldirname (abs
.get ()) + SLASH_STRING
+ filename
;
2677 filename
= abs_storage
.c_str ();
2680 /* First try the file name given in the section. If that doesn't
2681 work, try to use the build-id instead. */
2682 gdb_bfd_ref_ptr
dwz_bfd (gdb_bfd_open (filename
, gnutarget
, -1));
2683 if (dwz_bfd
!= NULL
)
2685 if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2689 if (dwz_bfd
== NULL
)
2690 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2692 if (dwz_bfd
== NULL
)
2693 error (_("could not find '.gnu_debugaltlink' file for %s"),
2694 objfile_name (dwarf2_per_objfile
->objfile
));
2696 result
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
2698 result
->dwz_bfd
= dwz_bfd
.release ();
2700 bfd_map_over_sections (result
->dwz_bfd
, locate_dwz_sections
, result
);
2702 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, result
->dwz_bfd
);
2703 dwarf2_per_objfile
->dwz_file
= result
;
2707 /* DWARF quick_symbols_functions support. */
2709 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2710 unique line tables, so we maintain a separate table of all .debug_line
2711 derived entries to support the sharing.
2712 All the quick functions need is the list of file names. We discard the
2713 line_header when we're done and don't need to record it here. */
2714 struct quick_file_names
2716 /* The data used to construct the hash key. */
2717 struct stmt_list_hash hash
;
2719 /* The number of entries in file_names, real_names. */
2720 unsigned int num_file_names
;
2722 /* The file names from the line table, after being run through
2724 const char **file_names
;
2726 /* The file names from the line table after being run through
2727 gdb_realpath. These are computed lazily. */
2728 const char **real_names
;
2731 /* When using the index (and thus not using psymtabs), each CU has an
2732 object of this type. This is used to hold information needed by
2733 the various "quick" methods. */
2734 struct dwarf2_per_cu_quick_data
2736 /* The file table. This can be NULL if there was no file table
2737 or it's currently not read in.
2738 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2739 struct quick_file_names
*file_names
;
2741 /* The corresponding symbol table. This is NULL if symbols for this
2742 CU have not yet been read. */
2743 struct compunit_symtab
*compunit_symtab
;
2745 /* A temporary mark bit used when iterating over all CUs in
2746 expand_symtabs_matching. */
2747 unsigned int mark
: 1;
2749 /* True if we've tried to read the file table and found there isn't one.
2750 There will be no point in trying to read it again next time. */
2751 unsigned int no_file_data
: 1;
2754 /* Utility hash function for a stmt_list_hash. */
2757 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2761 if (stmt_list_hash
->dwo_unit
!= NULL
)
2762 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2763 v
+= to_underlying (stmt_list_hash
->line_sect_off
);
2767 /* Utility equality function for a stmt_list_hash. */
2770 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2771 const struct stmt_list_hash
*rhs
)
2773 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2775 if (lhs
->dwo_unit
!= NULL
2776 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2779 return lhs
->line_sect_off
== rhs
->line_sect_off
;
2782 /* Hash function for a quick_file_names. */
2785 hash_file_name_entry (const void *e
)
2787 const struct quick_file_names
*file_data
2788 = (const struct quick_file_names
*) e
;
2790 return hash_stmt_list_entry (&file_data
->hash
);
2793 /* Equality function for a quick_file_names. */
2796 eq_file_name_entry (const void *a
, const void *b
)
2798 const struct quick_file_names
*ea
= (const struct quick_file_names
*) a
;
2799 const struct quick_file_names
*eb
= (const struct quick_file_names
*) b
;
2801 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2804 /* Delete function for a quick_file_names. */
2807 delete_file_name_entry (void *e
)
2809 struct quick_file_names
*file_data
= (struct quick_file_names
*) e
;
2812 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2814 xfree ((void*) file_data
->file_names
[i
]);
2815 if (file_data
->real_names
)
2816 xfree ((void*) file_data
->real_names
[i
]);
2819 /* The space for the struct itself lives on objfile_obstack,
2820 so we don't free it here. */
2823 /* Create a quick_file_names hash table. */
2826 create_quick_file_names_table (unsigned int nr_initial_entries
)
2828 return htab_create_alloc (nr_initial_entries
,
2829 hash_file_name_entry
, eq_file_name_entry
,
2830 delete_file_name_entry
, xcalloc
, xfree
);
2833 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2834 have to be created afterwards. You should call age_cached_comp_units after
2835 processing PER_CU->CU. dw2_setup must have been already called. */
2838 load_cu (struct dwarf2_per_cu_data
*per_cu
)
2840 if (per_cu
->is_debug_types
)
2841 load_full_type_unit (per_cu
);
2843 load_full_comp_unit (per_cu
, language_minimal
);
2845 if (per_cu
->cu
== NULL
)
2846 return; /* Dummy CU. */
2848 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2851 /* Read in the symbols for PER_CU. */
2854 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2856 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2858 /* Skip type_unit_groups, reading the type units they contain
2859 is handled elsewhere. */
2860 if (IS_TYPE_UNIT_GROUP (per_cu
))
2863 /* The destructor of dwarf2_queue_guard frees any entries left on
2864 the queue. After this point we're guaranteed to leave this function
2865 with the dwarf queue empty. */
2866 dwarf2_queue_guard q_guard
;
2868 if (dwarf2_per_objfile
->using_index
2869 ? per_cu
->v
.quick
->compunit_symtab
== NULL
2870 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2872 queue_comp_unit (per_cu
, language_minimal
);
2875 /* If we just loaded a CU from a DWO, and we're working with an index
2876 that may badly handle TUs, load all the TUs in that DWO as well.
2877 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2878 if (!per_cu
->is_debug_types
2879 && per_cu
->cu
!= NULL
2880 && per_cu
->cu
->dwo_unit
!= NULL
2881 && dwarf2_per_objfile
->index_table
!= NULL
2882 && dwarf2_per_objfile
->index_table
->version
<= 7
2883 /* DWP files aren't supported yet. */
2884 && get_dwp_file (dwarf2_per_objfile
) == NULL
)
2885 queue_and_load_all_dwo_tus (per_cu
);
2888 process_queue (dwarf2_per_objfile
);
2890 /* Age the cache, releasing compilation units that have not
2891 been used recently. */
2892 age_cached_comp_units (dwarf2_per_objfile
);
2895 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2896 the objfile from which this CU came. Returns the resulting symbol
2899 static struct compunit_symtab
*
2900 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2902 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2904 gdb_assert (dwarf2_per_objfile
->using_index
);
2905 if (!per_cu
->v
.quick
->compunit_symtab
)
2907 free_cached_comp_units
freer (dwarf2_per_objfile
);
2908 scoped_restore decrementer
= increment_reading_symtab ();
2909 dw2_do_instantiate_symtab (per_cu
);
2910 process_cu_includes (dwarf2_per_objfile
);
2913 return per_cu
->v
.quick
->compunit_symtab
;
2916 /* See declaration. */
2918 dwarf2_per_cu_data
*
2919 dwarf2_per_objfile::get_cutu (int index
)
2921 if (index
>= this->all_comp_units
.size ())
2923 index
-= this->all_comp_units
.size ();
2924 gdb_assert (index
< this->all_type_units
.size ());
2925 return &this->all_type_units
[index
]->per_cu
;
2928 return this->all_comp_units
[index
];
2931 /* See declaration. */
2933 dwarf2_per_cu_data
*
2934 dwarf2_per_objfile::get_cu (int index
)
2936 gdb_assert (index
>= 0 && index
< this->all_comp_units
.size ());
2938 return this->all_comp_units
[index
];
2941 /* See declaration. */
2944 dwarf2_per_objfile::get_tu (int index
)
2946 gdb_assert (index
>= 0 && index
< this->all_type_units
.size ());
2948 return this->all_type_units
[index
];
2951 /* Return a new dwarf2_per_cu_data allocated on OBJFILE's
2952 objfile_obstack, and constructed with the specified field
2955 static dwarf2_per_cu_data
*
2956 create_cu_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2957 struct dwarf2_section_info
*section
,
2959 sect_offset sect_off
, ULONGEST length
)
2961 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2962 dwarf2_per_cu_data
*the_cu
2963 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2964 struct dwarf2_per_cu_data
);
2965 the_cu
->sect_off
= sect_off
;
2966 the_cu
->length
= length
;
2967 the_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
2968 the_cu
->section
= section
;
2969 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2970 struct dwarf2_per_cu_quick_data
);
2971 the_cu
->is_dwz
= is_dwz
;
2975 /* A helper for create_cus_from_index that handles a given list of
2979 create_cus_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2980 const gdb_byte
*cu_list
, offset_type n_elements
,
2981 struct dwarf2_section_info
*section
,
2984 for (offset_type i
= 0; i
< n_elements
; i
+= 2)
2986 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2988 sect_offset sect_off
2989 = (sect_offset
) extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2990 ULONGEST length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2993 dwarf2_per_cu_data
*per_cu
2994 = create_cu_from_index_list (dwarf2_per_objfile
, section
, is_dwz
,
2996 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
3000 /* Read the CU list from the mapped index, and use it to create all
3001 the CU objects for this objfile. */
3004 create_cus_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3005 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
3006 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
3008 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
3009 dwarf2_per_objfile
->all_comp_units
.reserve
3010 ((cu_list_elements
+ dwz_elements
) / 2);
3012 create_cus_from_index_list (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
3013 &dwarf2_per_objfile
->info
, 0);
3015 if (dwz_elements
== 0)
3018 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
3019 create_cus_from_index_list (dwarf2_per_objfile
, dwz_list
, dwz_elements
,
3023 /* Create the signatured type hash table from the index. */
3026 create_signatured_type_table_from_index
3027 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3028 struct dwarf2_section_info
*section
,
3029 const gdb_byte
*bytes
,
3030 offset_type elements
)
3032 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3034 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
3035 dwarf2_per_objfile
->all_type_units
.reserve (elements
/ 3);
3037 htab_t sig_types_hash
= allocate_signatured_type_table (objfile
);
3039 for (offset_type i
= 0; i
< elements
; i
+= 3)
3041 struct signatured_type
*sig_type
;
3044 cu_offset type_offset_in_tu
;
3046 gdb_static_assert (sizeof (ULONGEST
) >= 8);
3047 sect_offset sect_off
3048 = (sect_offset
) extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
3050 = (cu_offset
) extract_unsigned_integer (bytes
+ 8, 8,
3052 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
3055 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3056 struct signatured_type
);
3057 sig_type
->signature
= signature
;
3058 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
3059 sig_type
->per_cu
.is_debug_types
= 1;
3060 sig_type
->per_cu
.section
= section
;
3061 sig_type
->per_cu
.sect_off
= sect_off
;
3062 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
3063 sig_type
->per_cu
.v
.quick
3064 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3065 struct dwarf2_per_cu_quick_data
);
3067 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
3070 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
3073 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
3076 /* Create the signatured type hash table from .debug_names. */
3079 create_signatured_type_table_from_debug_names
3080 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3081 const mapped_debug_names
&map
,
3082 struct dwarf2_section_info
*section
,
3083 struct dwarf2_section_info
*abbrev_section
)
3085 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3087 dwarf2_read_section (objfile
, section
);
3088 dwarf2_read_section (objfile
, abbrev_section
);
3090 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
3091 dwarf2_per_objfile
->all_type_units
.reserve (map
.tu_count
);
3093 htab_t sig_types_hash
= allocate_signatured_type_table (objfile
);
3095 for (uint32_t i
= 0; i
< map
.tu_count
; ++i
)
3097 struct signatured_type
*sig_type
;
3100 sect_offset sect_off
3101 = (sect_offset
) (extract_unsigned_integer
3102 (map
.tu_table_reordered
+ i
* map
.offset_size
,
3104 map
.dwarf5_byte_order
));
3106 comp_unit_head cu_header
;
3107 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
3109 section
->buffer
+ to_underlying (sect_off
),
3112 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3113 struct signatured_type
);
3114 sig_type
->signature
= cu_header
.signature
;
3115 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
3116 sig_type
->per_cu
.is_debug_types
= 1;
3117 sig_type
->per_cu
.section
= section
;
3118 sig_type
->per_cu
.sect_off
= sect_off
;
3119 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
3120 sig_type
->per_cu
.v
.quick
3121 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3122 struct dwarf2_per_cu_quick_data
);
3124 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
3127 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
3130 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
3133 /* Read the address map data from the mapped index, and use it to
3134 populate the objfile's psymtabs_addrmap. */
3137 create_addrmap_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3138 struct mapped_index
*index
)
3140 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3141 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3142 const gdb_byte
*iter
, *end
;
3143 struct addrmap
*mutable_map
;
3146 auto_obstack temp_obstack
;
3148 mutable_map
= addrmap_create_mutable (&temp_obstack
);
3150 iter
= index
->address_table
.data ();
3151 end
= iter
+ index
->address_table
.size ();
3153 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3157 ULONGEST hi
, lo
, cu_index
;
3158 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
3160 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
3162 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
3167 complaint (&symfile_complaints
,
3168 _(".gdb_index address table has invalid range (%s - %s)"),
3169 hex_string (lo
), hex_string (hi
));
3173 if (cu_index
>= dwarf2_per_objfile
->all_comp_units
.size ())
3175 complaint (&symfile_complaints
,
3176 _(".gdb_index address table has invalid CU number %u"),
3177 (unsigned) cu_index
);
3181 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
);
3182 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
);
3183 addrmap_set_empty (mutable_map
, lo
, hi
- 1,
3184 dwarf2_per_objfile
->get_cu (cu_index
));
3187 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
3188 &objfile
->objfile_obstack
);
3191 /* Read the address map data from DWARF-5 .debug_aranges, and use it to
3192 populate the objfile's psymtabs_addrmap. */
3195 create_addrmap_from_aranges (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3196 struct dwarf2_section_info
*section
)
3198 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3199 bfd
*abfd
= objfile
->obfd
;
3200 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3201 const CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
3202 SECT_OFF_TEXT (objfile
));
3204 auto_obstack temp_obstack
;
3205 addrmap
*mutable_map
= addrmap_create_mutable (&temp_obstack
);
3207 std::unordered_map
<sect_offset
,
3208 dwarf2_per_cu_data
*,
3209 gdb::hash_enum
<sect_offset
>>
3210 debug_info_offset_to_per_cu
;
3211 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
3213 const auto insertpair
3214 = debug_info_offset_to_per_cu
.emplace (per_cu
->sect_off
, per_cu
);
3215 if (!insertpair
.second
)
3217 warning (_("Section .debug_aranges in %s has duplicate "
3218 "debug_info_offset %s, ignoring .debug_aranges."),
3219 objfile_name (objfile
), sect_offset_str (per_cu
->sect_off
));
3224 dwarf2_read_section (objfile
, section
);
3226 const bfd_endian dwarf5_byte_order
= gdbarch_byte_order (gdbarch
);
3228 const gdb_byte
*addr
= section
->buffer
;
3230 while (addr
< section
->buffer
+ section
->size
)
3232 const gdb_byte
*const entry_addr
= addr
;
3233 unsigned int bytes_read
;
3235 const LONGEST entry_length
= read_initial_length (abfd
, addr
,
3239 const gdb_byte
*const entry_end
= addr
+ entry_length
;
3240 const bool dwarf5_is_dwarf64
= bytes_read
!= 4;
3241 const uint8_t offset_size
= dwarf5_is_dwarf64
? 8 : 4;
3242 if (addr
+ entry_length
> section
->buffer
+ section
->size
)
3244 warning (_("Section .debug_aranges in %s entry at offset %zu "
3245 "length %s exceeds section length %s, "
3246 "ignoring .debug_aranges."),
3247 objfile_name (objfile
), entry_addr
- section
->buffer
,
3248 plongest (bytes_read
+ entry_length
),
3249 pulongest (section
->size
));
3253 /* The version number. */
3254 const uint16_t version
= read_2_bytes (abfd
, addr
);
3258 warning (_("Section .debug_aranges in %s entry at offset %zu "
3259 "has unsupported version %d, ignoring .debug_aranges."),
3260 objfile_name (objfile
), entry_addr
- section
->buffer
,
3265 const uint64_t debug_info_offset
3266 = extract_unsigned_integer (addr
, offset_size
, dwarf5_byte_order
);
3267 addr
+= offset_size
;
3268 const auto per_cu_it
3269 = debug_info_offset_to_per_cu
.find (sect_offset (debug_info_offset
));
3270 if (per_cu_it
== debug_info_offset_to_per_cu
.cend ())
3272 warning (_("Section .debug_aranges in %s entry at offset %zu "
3273 "debug_info_offset %s does not exists, "
3274 "ignoring .debug_aranges."),
3275 objfile_name (objfile
), entry_addr
- section
->buffer
,
3276 pulongest (debug_info_offset
));
3279 dwarf2_per_cu_data
*const per_cu
= per_cu_it
->second
;
3281 const uint8_t address_size
= *addr
++;
3282 if (address_size
< 1 || address_size
> 8)
3284 warning (_("Section .debug_aranges in %s entry at offset %zu "
3285 "address_size %u is invalid, ignoring .debug_aranges."),
3286 objfile_name (objfile
), entry_addr
- section
->buffer
,
3291 const uint8_t segment_selector_size
= *addr
++;
3292 if (segment_selector_size
!= 0)
3294 warning (_("Section .debug_aranges in %s entry at offset %zu "
3295 "segment_selector_size %u is not supported, "
3296 "ignoring .debug_aranges."),
3297 objfile_name (objfile
), entry_addr
- section
->buffer
,
3298 segment_selector_size
);
3302 /* Must pad to an alignment boundary that is twice the address
3303 size. It is undocumented by the DWARF standard but GCC does
3305 for (size_t padding
= ((-(addr
- section
->buffer
))
3306 & (2 * address_size
- 1));
3307 padding
> 0; padding
--)
3310 warning (_("Section .debug_aranges in %s entry at offset %zu "
3311 "padding is not zero, ignoring .debug_aranges."),
3312 objfile_name (objfile
), entry_addr
- section
->buffer
);
3318 if (addr
+ 2 * address_size
> entry_end
)
3320 warning (_("Section .debug_aranges in %s entry at offset %zu "
3321 "address list is not properly terminated, "
3322 "ignoring .debug_aranges."),
3323 objfile_name (objfile
), entry_addr
- section
->buffer
);
3326 ULONGEST start
= extract_unsigned_integer (addr
, address_size
,
3328 addr
+= address_size
;
3329 ULONGEST length
= extract_unsigned_integer (addr
, address_size
,
3331 addr
+= address_size
;
3332 if (start
== 0 && length
== 0)
3334 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
3336 /* Symbol was eliminated due to a COMDAT group. */
3339 ULONGEST end
= start
+ length
;
3340 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
+ baseaddr
);
3341 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
+ baseaddr
);
3342 addrmap_set_empty (mutable_map
, start
, end
- 1, per_cu
);
3346 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
3347 &objfile
->objfile_obstack
);
3350 /* Find a slot in the mapped index INDEX for the object named NAME.
3351 If NAME is found, set *VEC_OUT to point to the CU vector in the
3352 constant pool and return true. If NAME cannot be found, return
3356 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
3357 offset_type
**vec_out
)
3360 offset_type slot
, step
;
3361 int (*cmp
) (const char *, const char *);
3363 gdb::unique_xmalloc_ptr
<char> without_params
;
3364 if (current_language
->la_language
== language_cplus
3365 || current_language
->la_language
== language_fortran
3366 || current_language
->la_language
== language_d
)
3368 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
3371 if (strchr (name
, '(') != NULL
)
3373 without_params
= cp_remove_params (name
);
3375 if (without_params
!= NULL
)
3376 name
= without_params
.get ();
3380 /* Index version 4 did not support case insensitive searches. But the
3381 indices for case insensitive languages are built in lowercase, therefore
3382 simulate our NAME being searched is also lowercased. */
3383 hash
= mapped_index_string_hash ((index
->version
== 4
3384 && case_sensitivity
== case_sensitive_off
3385 ? 5 : index
->version
),
3388 slot
= hash
& (index
->symbol_table
.size () - 1);
3389 step
= ((hash
* 17) & (index
->symbol_table
.size () - 1)) | 1;
3390 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
3396 const auto &bucket
= index
->symbol_table
[slot
];
3397 if (bucket
.name
== 0 && bucket
.vec
== 0)
3400 str
= index
->constant_pool
+ MAYBE_SWAP (bucket
.name
);
3401 if (!cmp (name
, str
))
3403 *vec_out
= (offset_type
*) (index
->constant_pool
3404 + MAYBE_SWAP (bucket
.vec
));
3408 slot
= (slot
+ step
) & (index
->symbol_table
.size () - 1);
3412 /* A helper function that reads the .gdb_index from SECTION and fills
3413 in MAP. FILENAME is the name of the file containing the section;
3414 it is used for error reporting. DEPRECATED_OK is true if it is
3415 ok to use deprecated sections.
3417 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
3418 out parameters that are filled in with information about the CU and
3419 TU lists in the section.
3421 Returns 1 if all went well, 0 otherwise. */
3424 read_index_from_section (struct objfile
*objfile
,
3425 const char *filename
,
3427 struct dwarf2_section_info
*section
,
3428 struct mapped_index
*map
,
3429 const gdb_byte
**cu_list
,
3430 offset_type
*cu_list_elements
,
3431 const gdb_byte
**types_list
,
3432 offset_type
*types_list_elements
)
3434 const gdb_byte
*addr
;
3435 offset_type version
;
3436 offset_type
*metadata
;
3439 if (dwarf2_section_empty_p (section
))
3442 /* Older elfutils strip versions could keep the section in the main
3443 executable while splitting it for the separate debug info file. */
3444 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
3447 dwarf2_read_section (objfile
, section
);
3449 addr
= section
->buffer
;
3450 /* Version check. */
3451 version
= MAYBE_SWAP (*(offset_type
*) addr
);
3452 /* Versions earlier than 3 emitted every copy of a psymbol. This
3453 causes the index to behave very poorly for certain requests. Version 3
3454 contained incomplete addrmap. So, it seems better to just ignore such
3458 static int warning_printed
= 0;
3459 if (!warning_printed
)
3461 warning (_("Skipping obsolete .gdb_index section in %s."),
3463 warning_printed
= 1;
3467 /* Index version 4 uses a different hash function than index version
3470 Versions earlier than 6 did not emit psymbols for inlined
3471 functions. Using these files will cause GDB not to be able to
3472 set breakpoints on inlined functions by name, so we ignore these
3473 indices unless the user has done
3474 "set use-deprecated-index-sections on". */
3475 if (version
< 6 && !deprecated_ok
)
3477 static int warning_printed
= 0;
3478 if (!warning_printed
)
3481 Skipping deprecated .gdb_index section in %s.\n\
3482 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3483 to use the section anyway."),
3485 warning_printed
= 1;
3489 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3490 of the TU (for symbols coming from TUs),
3491 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3492 Plus gold-generated indices can have duplicate entries for global symbols,
3493 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3494 These are just performance bugs, and we can't distinguish gdb-generated
3495 indices from gold-generated ones, so issue no warning here. */
3497 /* Indexes with higher version than the one supported by GDB may be no
3498 longer backward compatible. */
3502 map
->version
= version
;
3503 map
->total_size
= section
->size
;
3505 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3508 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3509 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3513 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3514 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3515 - MAYBE_SWAP (metadata
[i
]))
3519 const gdb_byte
*address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3520 const gdb_byte
*address_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3522 = gdb::array_view
<const gdb_byte
> (address_table
, address_table_end
);
3525 const gdb_byte
*symbol_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3526 const gdb_byte
*symbol_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3528 = gdb::array_view
<mapped_index::symbol_table_slot
>
3529 ((mapped_index::symbol_table_slot
*) symbol_table
,
3530 (mapped_index::symbol_table_slot
*) symbol_table_end
);
3533 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3538 /* Read .gdb_index. If everything went ok, initialize the "quick"
3539 elements of all the CUs and return 1. Otherwise, return 0. */
3542 dwarf2_read_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
3544 struct mapped_index local_map
, *map
;
3545 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3546 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3547 struct dwz_file
*dwz
;
3548 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3550 if (!read_index_from_section (objfile
, objfile_name (objfile
),
3551 use_deprecated_index_sections
,
3552 &dwarf2_per_objfile
->gdb_index
, &local_map
,
3553 &cu_list
, &cu_list_elements
,
3554 &types_list
, &types_list_elements
))
3557 /* Don't use the index if it's empty. */
3558 if (local_map
.symbol_table
.empty ())
3561 /* If there is a .dwz file, read it so we can get its CU list as
3563 dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
3566 struct mapped_index dwz_map
;
3567 const gdb_byte
*dwz_types_ignore
;
3568 offset_type dwz_types_elements_ignore
;
3570 if (!read_index_from_section (objfile
, bfd_get_filename (dwz
->dwz_bfd
),
3572 &dwz
->gdb_index
, &dwz_map
,
3573 &dwz_list
, &dwz_list_elements
,
3575 &dwz_types_elements_ignore
))
3577 warning (_("could not read '.gdb_index' section from %s; skipping"),
3578 bfd_get_filename (dwz
->dwz_bfd
));
3583 create_cus_from_index (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
3584 dwz_list
, dwz_list_elements
);
3586 if (types_list_elements
)
3588 struct dwarf2_section_info
*section
;
3590 /* We can only handle a single .debug_types when we have an
3592 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
3595 section
= VEC_index (dwarf2_section_info_def
,
3596 dwarf2_per_objfile
->types
, 0);
3598 create_signatured_type_table_from_index (dwarf2_per_objfile
, section
,
3599 types_list
, types_list_elements
);
3602 create_addrmap_from_index (dwarf2_per_objfile
, &local_map
);
3604 map
= XOBNEW (&objfile
->objfile_obstack
, struct mapped_index
);
3605 map
= new (map
) mapped_index ();
3608 dwarf2_per_objfile
->index_table
= map
;
3609 dwarf2_per_objfile
->using_index
= 1;
3610 dwarf2_per_objfile
->quick_file_names_table
=
3611 create_quick_file_names_table (dwarf2_per_objfile
->all_comp_units
.size ());
3616 /* die_reader_func for dw2_get_file_names. */
3619 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3620 const gdb_byte
*info_ptr
,
3621 struct die_info
*comp_unit_die
,
3625 struct dwarf2_cu
*cu
= reader
->cu
;
3626 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3627 struct dwarf2_per_objfile
*dwarf2_per_objfile
3628 = cu
->per_cu
->dwarf2_per_objfile
;
3629 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3630 struct dwarf2_per_cu_data
*lh_cu
;
3631 struct attribute
*attr
;
3634 struct quick_file_names
*qfn
;
3636 gdb_assert (! this_cu
->is_debug_types
);
3638 /* Our callers never want to match partial units -- instead they
3639 will match the enclosing full CU. */
3640 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3642 this_cu
->v
.quick
->no_file_data
= 1;
3650 sect_offset line_offset
{};
3652 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3655 struct quick_file_names find_entry
;
3657 line_offset
= (sect_offset
) DW_UNSND (attr
);
3659 /* We may have already read in this line header (TU line header sharing).
3660 If we have we're done. */
3661 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3662 find_entry
.hash
.line_sect_off
= line_offset
;
3663 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
3664 &find_entry
, INSERT
);
3667 lh_cu
->v
.quick
->file_names
= (struct quick_file_names
*) *slot
;
3671 lh
= dwarf_decode_line_header (line_offset
, cu
);
3675 lh_cu
->v
.quick
->no_file_data
= 1;
3679 qfn
= XOBNEW (&objfile
->objfile_obstack
, struct quick_file_names
);
3680 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3681 qfn
->hash
.line_sect_off
= line_offset
;
3682 gdb_assert (slot
!= NULL
);
3685 file_and_directory fnd
= find_file_and_directory (comp_unit_die
, cu
);
3687 qfn
->num_file_names
= lh
->file_names
.size ();
3689 XOBNEWVEC (&objfile
->objfile_obstack
, const char *, lh
->file_names
.size ());
3690 for (i
= 0; i
< lh
->file_names
.size (); ++i
)
3691 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
.get (), fnd
.comp_dir
);
3692 qfn
->real_names
= NULL
;
3694 lh_cu
->v
.quick
->file_names
= qfn
;
3697 /* A helper for the "quick" functions which attempts to read the line
3698 table for THIS_CU. */
3700 static struct quick_file_names
*
3701 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3703 /* This should never be called for TUs. */
3704 gdb_assert (! this_cu
->is_debug_types
);
3705 /* Nor type unit groups. */
3706 gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu
));
3708 if (this_cu
->v
.quick
->file_names
!= NULL
)
3709 return this_cu
->v
.quick
->file_names
;
3710 /* If we know there is no line data, no point in looking again. */
3711 if (this_cu
->v
.quick
->no_file_data
)
3714 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
3716 if (this_cu
->v
.quick
->no_file_data
)
3718 return this_cu
->v
.quick
->file_names
;
3721 /* A helper for the "quick" functions which computes and caches the
3722 real path for a given file name from the line table. */
3725 dw2_get_real_path (struct objfile
*objfile
,
3726 struct quick_file_names
*qfn
, int index
)
3728 if (qfn
->real_names
== NULL
)
3729 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
3730 qfn
->num_file_names
, const char *);
3732 if (qfn
->real_names
[index
] == NULL
)
3733 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]).release ();
3735 return qfn
->real_names
[index
];
3738 static struct symtab
*
3739 dw2_find_last_source_symtab (struct objfile
*objfile
)
3741 struct dwarf2_per_objfile
*dwarf2_per_objfile
3742 = get_dwarf2_per_objfile (objfile
);
3743 dwarf2_per_cu_data
*dwarf_cu
= dwarf2_per_objfile
->all_comp_units
.back ();
3744 compunit_symtab
*cust
= dw2_instantiate_symtab (dwarf_cu
);
3749 return compunit_primary_filetab (cust
);
3752 /* Traversal function for dw2_forget_cached_source_info. */
3755 dw2_free_cached_file_names (void **slot
, void *info
)
3757 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3759 if (file_data
->real_names
)
3763 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3765 xfree ((void*) file_data
->real_names
[i
]);
3766 file_data
->real_names
[i
] = NULL
;
3774 dw2_forget_cached_source_info (struct objfile
*objfile
)
3776 struct dwarf2_per_objfile
*dwarf2_per_objfile
3777 = get_dwarf2_per_objfile (objfile
);
3779 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
3780 dw2_free_cached_file_names
, NULL
);
3783 /* Helper function for dw2_map_symtabs_matching_filename that expands
3784 the symtabs and calls the iterator. */
3787 dw2_map_expand_apply (struct objfile
*objfile
,
3788 struct dwarf2_per_cu_data
*per_cu
,
3789 const char *name
, const char *real_path
,
3790 gdb::function_view
<bool (symtab
*)> callback
)
3792 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3794 /* Don't visit already-expanded CUs. */
3795 if (per_cu
->v
.quick
->compunit_symtab
)
3798 /* This may expand more than one symtab, and we want to iterate over
3800 dw2_instantiate_symtab (per_cu
);
3802 return iterate_over_some_symtabs (name
, real_path
, objfile
->compunit_symtabs
,
3803 last_made
, callback
);
3806 /* Implementation of the map_symtabs_matching_filename method. */
3809 dw2_map_symtabs_matching_filename
3810 (struct objfile
*objfile
, const char *name
, const char *real_path
,
3811 gdb::function_view
<bool (symtab
*)> callback
)
3813 const char *name_basename
= lbasename (name
);
3814 struct dwarf2_per_objfile
*dwarf2_per_objfile
3815 = get_dwarf2_per_objfile (objfile
);
3817 /* The rule is CUs specify all the files, including those used by
3818 any TU, so there's no need to scan TUs here. */
3820 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
3822 /* We only need to look at symtabs not already expanded. */
3823 if (per_cu
->v
.quick
->compunit_symtab
)
3826 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
3827 if (file_data
== NULL
)
3830 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3832 const char *this_name
= file_data
->file_names
[j
];
3833 const char *this_real_name
;
3835 if (compare_filenames_for_search (this_name
, name
))
3837 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3843 /* Before we invoke realpath, which can get expensive when many
3844 files are involved, do a quick comparison of the basenames. */
3845 if (! basenames_may_differ
3846 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3849 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3850 if (compare_filenames_for_search (this_real_name
, name
))
3852 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3858 if (real_path
!= NULL
)
3860 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3861 gdb_assert (IS_ABSOLUTE_PATH (name
));
3862 if (this_real_name
!= NULL
3863 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3865 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3877 /* Struct used to manage iterating over all CUs looking for a symbol. */
3879 struct dw2_symtab_iterator
3881 /* The dwarf2_per_objfile owning the CUs we are iterating on. */
3882 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
3883 /* If non-zero, only look for symbols that match BLOCK_INDEX. */
3884 int want_specific_block
;
3885 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
3886 Unused if !WANT_SPECIFIC_BLOCK. */
3888 /* The kind of symbol we're looking for. */
3890 /* The list of CUs from the index entry of the symbol,
3891 or NULL if not found. */
3893 /* The next element in VEC to look at. */
3895 /* The number of elements in VEC, or zero if there is no match. */
3897 /* Have we seen a global version of the symbol?
3898 If so we can ignore all further global instances.
3899 This is to work around gold/15646, inefficient gold-generated
3904 /* Initialize the index symtab iterator ITER.
3905 If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols
3906 in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
3909 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3910 struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3911 int want_specific_block
,
3916 iter
->dwarf2_per_objfile
= dwarf2_per_objfile
;
3917 iter
->want_specific_block
= want_specific_block
;
3918 iter
->block_index
= block_index
;
3919 iter
->domain
= domain
;
3921 iter
->global_seen
= 0;
3923 mapped_index
*index
= dwarf2_per_objfile
->index_table
;
3925 /* index is NULL if OBJF_READNOW. */
3926 if (index
!= NULL
&& find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3927 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3935 /* Return the next matching CU or NULL if there are no more. */
3937 static struct dwarf2_per_cu_data
*
3938 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3940 struct dwarf2_per_objfile
*dwarf2_per_objfile
= iter
->dwarf2_per_objfile
;
3942 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3944 offset_type cu_index_and_attrs
=
3945 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3946 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3947 int want_static
= iter
->block_index
!= GLOBAL_BLOCK
;
3948 /* This value is only valid for index versions >= 7. */
3949 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3950 gdb_index_symbol_kind symbol_kind
=
3951 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3952 /* Only check the symbol attributes if they're present.
3953 Indices prior to version 7 don't record them,
3954 and indices >= 7 may elide them for certain symbols
3955 (gold does this). */
3957 (dwarf2_per_objfile
->index_table
->version
>= 7
3958 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3960 /* Don't crash on bad data. */
3961 if (cu_index
>= (dwarf2_per_objfile
->all_comp_units
.size ()
3962 + dwarf2_per_objfile
->all_type_units
.size ()))
3964 complaint (&symfile_complaints
,
3965 _(".gdb_index entry has bad CU index"
3967 objfile_name (dwarf2_per_objfile
->objfile
));
3971 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
3973 /* Skip if already read in. */
3974 if (per_cu
->v
.quick
->compunit_symtab
)
3977 /* Check static vs global. */
3980 if (iter
->want_specific_block
3981 && want_static
!= is_static
)
3983 /* Work around gold/15646. */
3984 if (!is_static
&& iter
->global_seen
)
3987 iter
->global_seen
= 1;
3990 /* Only check the symbol's kind if it has one. */
3993 switch (iter
->domain
)
3996 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3997 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3998 /* Some types are also in VAR_DOMAIN. */
3999 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4003 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4007 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
4022 static struct compunit_symtab
*
4023 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
4024 const char *name
, domain_enum domain
)
4026 struct compunit_symtab
*stab_best
= NULL
;
4027 struct dwarf2_per_objfile
*dwarf2_per_objfile
4028 = get_dwarf2_per_objfile (objfile
);
4030 lookup_name_info
lookup_name (name
, symbol_name_match_type::FULL
);
4032 struct dw2_symtab_iterator iter
;
4033 struct dwarf2_per_cu_data
*per_cu
;
4035 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, 1, block_index
, domain
, name
);
4037 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
4039 struct symbol
*sym
, *with_opaque
= NULL
;
4040 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
);
4041 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
4042 struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
4044 sym
= block_find_symbol (block
, name
, domain
,
4045 block_find_non_opaque_type_preferred
,
4048 /* Some caution must be observed with overloaded functions
4049 and methods, since the index will not contain any overload
4050 information (but NAME might contain it). */
4053 && SYMBOL_MATCHES_SEARCH_NAME (sym
, lookup_name
))
4055 if (with_opaque
!= NULL
4056 && SYMBOL_MATCHES_SEARCH_NAME (with_opaque
, lookup_name
))
4059 /* Keep looking through other CUs. */
4066 dw2_print_stats (struct objfile
*objfile
)
4068 struct dwarf2_per_objfile
*dwarf2_per_objfile
4069 = get_dwarf2_per_objfile (objfile
);
4070 int total
= (dwarf2_per_objfile
->all_comp_units
.size ()
4071 + dwarf2_per_objfile
->all_type_units
.size ());
4074 for (int i
= 0; i
< total
; ++i
)
4076 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
4078 if (!per_cu
->v
.quick
->compunit_symtab
)
4081 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
4082 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
4085 /* This dumps minimal information about the index.
4086 It is called via "mt print objfiles".
4087 One use is to verify .gdb_index has been loaded by the
4088 gdb.dwarf2/gdb-index.exp testcase. */
4091 dw2_dump (struct objfile
*objfile
)
4093 struct dwarf2_per_objfile
*dwarf2_per_objfile
4094 = get_dwarf2_per_objfile (objfile
);
4096 gdb_assert (dwarf2_per_objfile
->using_index
);
4097 printf_filtered (".gdb_index:");
4098 if (dwarf2_per_objfile
->index_table
!= NULL
)
4100 printf_filtered (" version %d\n",
4101 dwarf2_per_objfile
->index_table
->version
);
4104 printf_filtered (" faked for \"readnow\"\n");
4105 printf_filtered ("\n");
4109 dw2_relocate (struct objfile
*objfile
,
4110 const struct section_offsets
*new_offsets
,
4111 const struct section_offsets
*delta
)
4113 /* There's nothing to relocate here. */
4117 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
4118 const char *func_name
)
4120 struct dwarf2_per_objfile
*dwarf2_per_objfile
4121 = get_dwarf2_per_objfile (objfile
);
4123 struct dw2_symtab_iterator iter
;
4124 struct dwarf2_per_cu_data
*per_cu
;
4126 /* Note: It doesn't matter what we pass for block_index here. */
4127 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, 0, GLOBAL_BLOCK
, VAR_DOMAIN
,
4130 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
4131 dw2_instantiate_symtab (per_cu
);
4136 dw2_expand_all_symtabs (struct objfile
*objfile
)
4138 struct dwarf2_per_objfile
*dwarf2_per_objfile
4139 = get_dwarf2_per_objfile (objfile
);
4140 int total_units
= (dwarf2_per_objfile
->all_comp_units
.size ()
4141 + dwarf2_per_objfile
->all_type_units
.size ());
4143 for (int i
= 0; i
< total_units
; ++i
)
4145 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
4147 dw2_instantiate_symtab (per_cu
);
4152 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
4153 const char *fullname
)
4155 struct dwarf2_per_objfile
*dwarf2_per_objfile
4156 = get_dwarf2_per_objfile (objfile
);
4158 /* We don't need to consider type units here.
4159 This is only called for examining code, e.g. expand_line_sal.
4160 There can be an order of magnitude (or more) more type units
4161 than comp units, and we avoid them if we can. */
4163 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4165 /* We only need to look at symtabs not already expanded. */
4166 if (per_cu
->v
.quick
->compunit_symtab
)
4169 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
4170 if (file_data
== NULL
)
4173 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4175 const char *this_fullname
= file_data
->file_names
[j
];
4177 if (filename_cmp (this_fullname
, fullname
) == 0)
4179 dw2_instantiate_symtab (per_cu
);
4187 dw2_map_matching_symbols (struct objfile
*objfile
,
4188 const char * name
, domain_enum domain
,
4190 int (*callback
) (struct block
*,
4191 struct symbol
*, void *),
4192 void *data
, symbol_name_match_type match
,
4193 symbol_compare_ftype
*ordered_compare
)
4195 /* Currently unimplemented; used for Ada. The function can be called if the
4196 current language is Ada for a non-Ada objfile using GNU index. As Ada
4197 does not look for non-Ada symbols this function should just return. */
4200 /* Symbol name matcher for .gdb_index names.
4202 Symbol names in .gdb_index have a few particularities:
4204 - There's no indication of which is the language of each symbol.
4206 Since each language has its own symbol name matching algorithm,
4207 and we don't know which language is the right one, we must match
4208 each symbol against all languages. This would be a potential
4209 performance problem if it were not mitigated by the
4210 mapped_index::name_components lookup table, which significantly
4211 reduces the number of times we need to call into this matcher,
4212 making it a non-issue.
4214 - Symbol names in the index have no overload (parameter)
4215 information. I.e., in C++, "foo(int)" and "foo(long)" both
4216 appear as "foo" in the index, for example.
4218 This means that the lookup names passed to the symbol name
4219 matcher functions must have no parameter information either
4220 because (e.g.) symbol search name "foo" does not match
4221 lookup-name "foo(int)" [while swapping search name for lookup
4224 class gdb_index_symbol_name_matcher
4227 /* Prepares the vector of comparison functions for LOOKUP_NAME. */
4228 gdb_index_symbol_name_matcher (const lookup_name_info
&lookup_name
);
4230 /* Walk all the matcher routines and match SYMBOL_NAME against them.
4231 Returns true if any matcher matches. */
4232 bool matches (const char *symbol_name
);
4235 /* A reference to the lookup name we're matching against. */
4236 const lookup_name_info
&m_lookup_name
;
4238 /* A vector holding all the different symbol name matchers, for all
4240 std::vector
<symbol_name_matcher_ftype
*> m_symbol_name_matcher_funcs
;
4243 gdb_index_symbol_name_matcher::gdb_index_symbol_name_matcher
4244 (const lookup_name_info
&lookup_name
)
4245 : m_lookup_name (lookup_name
)
4247 /* Prepare the vector of comparison functions upfront, to avoid
4248 doing the same work for each symbol. Care is taken to avoid
4249 matching with the same matcher more than once if/when multiple
4250 languages use the same matcher function. */
4251 auto &matchers
= m_symbol_name_matcher_funcs
;
4252 matchers
.reserve (nr_languages
);
4254 matchers
.push_back (default_symbol_name_matcher
);
4256 for (int i
= 0; i
< nr_languages
; i
++)
4258 const language_defn
*lang
= language_def ((enum language
) i
);
4259 symbol_name_matcher_ftype
*name_matcher
4260 = get_symbol_name_matcher (lang
, m_lookup_name
);
4262 /* Don't insert the same comparison routine more than once.
4263 Note that we do this linear walk instead of a seemingly
4264 cheaper sorted insert, or use a std::set or something like
4265 that, because relative order of function addresses is not
4266 stable. This is not a problem in practice because the number
4267 of supported languages is low, and the cost here is tiny
4268 compared to the number of searches we'll do afterwards using
4270 if (name_matcher
!= default_symbol_name_matcher
4271 && (std::find (matchers
.begin (), matchers
.end (), name_matcher
)
4272 == matchers
.end ()))
4273 matchers
.push_back (name_matcher
);
4278 gdb_index_symbol_name_matcher::matches (const char *symbol_name
)
4280 for (auto matches_name
: m_symbol_name_matcher_funcs
)
4281 if (matches_name (symbol_name
, m_lookup_name
, NULL
))
4287 /* Starting from a search name, return the string that finds the upper
4288 bound of all strings that start with SEARCH_NAME in a sorted name
4289 list. Returns the empty string to indicate that the upper bound is
4290 the end of the list. */
4293 make_sort_after_prefix_name (const char *search_name
)
4295 /* When looking to complete "func", we find the upper bound of all
4296 symbols that start with "func" by looking for where we'd insert
4297 the closest string that would follow "func" in lexicographical
4298 order. Usually, that's "func"-with-last-character-incremented,
4299 i.e. "fund". Mind non-ASCII characters, though. Usually those
4300 will be UTF-8 multi-byte sequences, but we can't be certain.
4301 Especially mind the 0xff character, which is a valid character in
4302 non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't
4303 rule out compilers allowing it in identifiers. Note that
4304 conveniently, strcmp/strcasecmp are specified to compare
4305 characters interpreted as unsigned char. So what we do is treat
4306 the whole string as a base 256 number composed of a sequence of
4307 base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps
4308 to 0, and carries 1 to the following more-significant position.
4309 If the very first character in SEARCH_NAME ends up incremented
4310 and carries/overflows, then the upper bound is the end of the
4311 list. The string after the empty string is also the empty
4314 Some examples of this operation:
4316 SEARCH_NAME => "+1" RESULT
4320 "\xff" "a" "\xff" => "\xff" "b"
4325 Then, with these symbols for example:
4331 completing "func" looks for symbols between "func" and
4332 "func"-with-last-character-incremented, i.e. "fund" (exclusive),
4333 which finds "func" and "func1", but not "fund".
4337 funcÿ (Latin1 'ÿ' [0xff])
4341 completing "funcÿ" looks for symbols between "funcÿ" and "fund"
4342 (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund".
4346 ÿÿ (Latin1 'ÿ' [0xff])
4349 completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and
4350 the end of the list.
4352 std::string after
= search_name
;
4353 while (!after
.empty () && (unsigned char) after
.back () == 0xff)
4355 if (!after
.empty ())
4356 after
.back () = (unsigned char) after
.back () + 1;
4360 /* See declaration. */
4362 std::pair
<std::vector
<name_component
>::const_iterator
,
4363 std::vector
<name_component
>::const_iterator
>
4364 mapped_index_base::find_name_components_bounds
4365 (const lookup_name_info
&lookup_name_without_params
) const
4368 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
4371 = lookup_name_without_params
.cplus ().lookup_name ().c_str ();
4373 /* Comparison function object for lower_bound that matches against a
4374 given symbol name. */
4375 auto lookup_compare_lower
= [&] (const name_component
&elem
,
4378 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
4379 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4380 return name_cmp (elem_name
, name
) < 0;
4383 /* Comparison function object for upper_bound that matches against a
4384 given symbol name. */
4385 auto lookup_compare_upper
= [&] (const char *name
,
4386 const name_component
&elem
)
4388 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
4389 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4390 return name_cmp (name
, elem_name
) < 0;
4393 auto begin
= this->name_components
.begin ();
4394 auto end
= this->name_components
.end ();
4396 /* Find the lower bound. */
4399 if (lookup_name_without_params
.completion_mode () && cplus
[0] == '\0')
4402 return std::lower_bound (begin
, end
, cplus
, lookup_compare_lower
);
4405 /* Find the upper bound. */
4408 if (lookup_name_without_params
.completion_mode ())
4410 /* In completion mode, we want UPPER to point past all
4411 symbols names that have the same prefix. I.e., with
4412 these symbols, and completing "func":
4414 function << lower bound
4416 other_function << upper bound
4418 We find the upper bound by looking for the insertion
4419 point of "func"-with-last-character-incremented,
4421 std::string after
= make_sort_after_prefix_name (cplus
);
4424 return std::lower_bound (lower
, end
, after
.c_str (),
4425 lookup_compare_lower
);
4428 return std::upper_bound (lower
, end
, cplus
, lookup_compare_upper
);
4431 return {lower
, upper
};
4434 /* See declaration. */
4437 mapped_index_base::build_name_components ()
4439 if (!this->name_components
.empty ())
4442 this->name_components_casing
= case_sensitivity
;
4444 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
4446 /* The code below only knows how to break apart components of C++
4447 symbol names (and other languages that use '::' as
4448 namespace/module separator). If we add support for wild matching
4449 to some language that uses some other operator (E.g., Ada, Go and
4450 D use '.'), then we'll need to try splitting the symbol name
4451 according to that language too. Note that Ada does support wild
4452 matching, but doesn't currently support .gdb_index. */
4453 auto count
= this->symbol_name_count ();
4454 for (offset_type idx
= 0; idx
< count
; idx
++)
4456 if (this->symbol_name_slot_invalid (idx
))
4459 const char *name
= this->symbol_name_at (idx
);
4461 /* Add each name component to the name component table. */
4462 unsigned int previous_len
= 0;
4463 for (unsigned int current_len
= cp_find_first_component (name
);
4464 name
[current_len
] != '\0';
4465 current_len
+= cp_find_first_component (name
+ current_len
))
4467 gdb_assert (name
[current_len
] == ':');
4468 this->name_components
.push_back ({previous_len
, idx
});
4469 /* Skip the '::'. */
4471 previous_len
= current_len
;
4473 this->name_components
.push_back ({previous_len
, idx
});
4476 /* Sort name_components elements by name. */
4477 auto name_comp_compare
= [&] (const name_component
&left
,
4478 const name_component
&right
)
4480 const char *left_qualified
= this->symbol_name_at (left
.idx
);
4481 const char *right_qualified
= this->symbol_name_at (right
.idx
);
4483 const char *left_name
= left_qualified
+ left
.name_offset
;
4484 const char *right_name
= right_qualified
+ right
.name_offset
;
4486 return name_cmp (left_name
, right_name
) < 0;
4489 std::sort (this->name_components
.begin (),
4490 this->name_components
.end (),
4494 /* Helper for dw2_expand_symtabs_matching that works with a
4495 mapped_index_base instead of the containing objfile. This is split
4496 to a separate function in order to be able to unit test the
4497 name_components matching using a mock mapped_index_base. For each
4498 symbol name that matches, calls MATCH_CALLBACK, passing it the
4499 symbol's index in the mapped_index_base symbol table. */
4502 dw2_expand_symtabs_matching_symbol
4503 (mapped_index_base
&index
,
4504 const lookup_name_info
&lookup_name_in
,
4505 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4506 enum search_domain kind
,
4507 gdb::function_view
<void (offset_type
)> match_callback
)
4509 lookup_name_info lookup_name_without_params
4510 = lookup_name_in
.make_ignore_params ();
4511 gdb_index_symbol_name_matcher lookup_name_matcher
4512 (lookup_name_without_params
);
4514 /* Build the symbol name component sorted vector, if we haven't
4516 index
.build_name_components ();
4518 auto bounds
= index
.find_name_components_bounds (lookup_name_without_params
);
4520 /* Now for each symbol name in range, check to see if we have a name
4521 match, and if so, call the MATCH_CALLBACK callback. */
4523 /* The same symbol may appear more than once in the range though.
4524 E.g., if we're looking for symbols that complete "w", and we have
4525 a symbol named "w1::w2", we'll find the two name components for
4526 that same symbol in the range. To be sure we only call the
4527 callback once per symbol, we first collect the symbol name
4528 indexes that matched in a temporary vector and ignore
4530 std::vector
<offset_type
> matches
;
4531 matches
.reserve (std::distance (bounds
.first
, bounds
.second
));
4533 for (; bounds
.first
!= bounds
.second
; ++bounds
.first
)
4535 const char *qualified
= index
.symbol_name_at (bounds
.first
->idx
);
4537 if (!lookup_name_matcher
.matches (qualified
)
4538 || (symbol_matcher
!= NULL
&& !symbol_matcher (qualified
)))
4541 matches
.push_back (bounds
.first
->idx
);
4544 std::sort (matches
.begin (), matches
.end ());
4546 /* Finally call the callback, once per match. */
4548 for (offset_type idx
: matches
)
4552 match_callback (idx
);
4557 /* Above we use a type wider than idx's for 'prev', since 0 and
4558 (offset_type)-1 are both possible values. */
4559 static_assert (sizeof (prev
) > sizeof (offset_type
), "");
4564 namespace selftests
{ namespace dw2_expand_symtabs_matching
{
4566 /* A mock .gdb_index/.debug_names-like name index table, enough to
4567 exercise dw2_expand_symtabs_matching_symbol, which works with the
4568 mapped_index_base interface. Builds an index from the symbol list
4569 passed as parameter to the constructor. */
4570 class mock_mapped_index
: public mapped_index_base
4573 mock_mapped_index (gdb::array_view
<const char *> symbols
)
4574 : m_symbol_table (symbols
)
4577 DISABLE_COPY_AND_ASSIGN (mock_mapped_index
);
4579 /* Return the number of names in the symbol table. */
4580 size_t symbol_name_count () const override
4582 return m_symbol_table
.size ();
4585 /* Get the name of the symbol at IDX in the symbol table. */
4586 const char *symbol_name_at (offset_type idx
) const override
4588 return m_symbol_table
[idx
];
4592 gdb::array_view
<const char *> m_symbol_table
;
4595 /* Convenience function that converts a NULL pointer to a "<null>"
4596 string, to pass to print routines. */
4599 string_or_null (const char *str
)
4601 return str
!= NULL
? str
: "<null>";
4604 /* Check if a lookup_name_info built from
4605 NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock
4606 index. EXPECTED_LIST is the list of expected matches, in expected
4607 matching order. If no match expected, then an empty list is
4608 specified. Returns true on success. On failure prints a warning
4609 indicating the file:line that failed, and returns false. */
4612 check_match (const char *file
, int line
,
4613 mock_mapped_index
&mock_index
,
4614 const char *name
, symbol_name_match_type match_type
,
4615 bool completion_mode
,
4616 std::initializer_list
<const char *> expected_list
)
4618 lookup_name_info
lookup_name (name
, match_type
, completion_mode
);
4620 bool matched
= true;
4622 auto mismatch
= [&] (const char *expected_str
,
4625 warning (_("%s:%d: match_type=%s, looking-for=\"%s\", "
4626 "expected=\"%s\", got=\"%s\"\n"),
4628 (match_type
== symbol_name_match_type::FULL
4630 name
, string_or_null (expected_str
), string_or_null (got
));
4634 auto expected_it
= expected_list
.begin ();
4635 auto expected_end
= expected_list
.end ();
4637 dw2_expand_symtabs_matching_symbol (mock_index
, lookup_name
,
4639 [&] (offset_type idx
)
4641 const char *matched_name
= mock_index
.symbol_name_at (idx
);
4642 const char *expected_str
4643 = expected_it
== expected_end
? NULL
: *expected_it
++;
4645 if (expected_str
== NULL
|| strcmp (expected_str
, matched_name
) != 0)
4646 mismatch (expected_str
, matched_name
);
4649 const char *expected_str
4650 = expected_it
== expected_end
? NULL
: *expected_it
++;
4651 if (expected_str
!= NULL
)
4652 mismatch (expected_str
, NULL
);
4657 /* The symbols added to the mock mapped_index for testing (in
4659 static const char *test_symbols
[] = {
4668 "ns2::tmpl<int>::foo2",
4669 "(anonymous namespace)::A::B::C",
4671 /* These are used to check that the increment-last-char in the
4672 matching algorithm for completion doesn't match "t1_fund" when
4673 completing "t1_func". */
4679 /* A UTF-8 name with multi-byte sequences to make sure that
4680 cp-name-parser understands this as a single identifier ("função"
4681 is "function" in PT). */
4684 /* \377 (0xff) is Latin1 'ÿ'. */
4687 /* \377 (0xff) is Latin1 'ÿ'. */
4691 /* A name with all sorts of complications. Starts with "z" to make
4692 it easier for the completion tests below. */
4693 #define Z_SYM_NAME \
4694 "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \
4695 "::tuple<(anonymous namespace)::ui*, " \
4696 "std::default_delete<(anonymous namespace)::ui>, void>"
4701 /* Returns true if the mapped_index_base::find_name_component_bounds
4702 method finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME,
4703 in completion mode. */
4706 check_find_bounds_finds (mapped_index_base
&index
,
4707 const char *search_name
,
4708 gdb::array_view
<const char *> expected_syms
)
4710 lookup_name_info
lookup_name (search_name
,
4711 symbol_name_match_type::FULL
, true);
4713 auto bounds
= index
.find_name_components_bounds (lookup_name
);
4715 size_t distance
= std::distance (bounds
.first
, bounds
.second
);
4716 if (distance
!= expected_syms
.size ())
4719 for (size_t exp_elem
= 0; exp_elem
< distance
; exp_elem
++)
4721 auto nc_elem
= bounds
.first
+ exp_elem
;
4722 const char *qualified
= index
.symbol_name_at (nc_elem
->idx
);
4723 if (strcmp (qualified
, expected_syms
[exp_elem
]) != 0)
4730 /* Test the lower-level mapped_index::find_name_component_bounds
4734 test_mapped_index_find_name_component_bounds ()
4736 mock_mapped_index
mock_index (test_symbols
);
4738 mock_index
.build_name_components ();
4740 /* Test the lower-level mapped_index::find_name_component_bounds
4741 method in completion mode. */
4743 static const char *expected_syms
[] = {
4748 SELF_CHECK (check_find_bounds_finds (mock_index
,
4749 "t1_func", expected_syms
));
4752 /* Check that the increment-last-char in the name matching algorithm
4753 for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */
4755 static const char *expected_syms1
[] = {
4759 SELF_CHECK (check_find_bounds_finds (mock_index
,
4760 "\377", expected_syms1
));
4762 static const char *expected_syms2
[] = {
4765 SELF_CHECK (check_find_bounds_finds (mock_index
,
4766 "\377\377", expected_syms2
));
4770 /* Test dw2_expand_symtabs_matching_symbol. */
4773 test_dw2_expand_symtabs_matching_symbol ()
4775 mock_mapped_index
mock_index (test_symbols
);
4777 /* We let all tests run until the end even if some fails, for debug
4779 bool any_mismatch
= false;
4781 /* Create the expected symbols list (an initializer_list). Needed
4782 because lists have commas, and we need to pass them to CHECK,
4783 which is a macro. */
4784 #define EXPECT(...) { __VA_ARGS__ }
4786 /* Wrapper for check_match that passes down the current
4787 __FILE__/__LINE__. */
4788 #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \
4789 any_mismatch |= !check_match (__FILE__, __LINE__, \
4791 NAME, MATCH_TYPE, COMPLETION_MODE, \
4794 /* Identity checks. */
4795 for (const char *sym
: test_symbols
)
4797 /* Should be able to match all existing symbols. */
4798 CHECK_MATCH (sym
, symbol_name_match_type::FULL
, false,
4801 /* Should be able to match all existing symbols with
4803 std::string with_params
= std::string (sym
) + "(int)";
4804 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4807 /* Should be able to match all existing symbols with
4808 parameters and qualifiers. */
4809 with_params
= std::string (sym
) + " ( int ) const";
4810 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4813 /* This should really find sym, but cp-name-parser.y doesn't
4814 know about lvalue/rvalue qualifiers yet. */
4815 with_params
= std::string (sym
) + " ( int ) &&";
4816 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4820 /* Check that the name matching algorithm for completion doesn't get
4821 confused with Latin1 'ÿ' / 0xff. */
4823 static const char str
[] = "\377";
4824 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4825 EXPECT ("\377", "\377\377123"));
4828 /* Check that the increment-last-char in the matching algorithm for
4829 completion doesn't match "t1_fund" when completing "t1_func". */
4831 static const char str
[] = "t1_func";
4832 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4833 EXPECT ("t1_func", "t1_func1"));
4836 /* Check that completion mode works at each prefix of the expected
4839 static const char str
[] = "function(int)";
4840 size_t len
= strlen (str
);
4843 for (size_t i
= 1; i
< len
; i
++)
4845 lookup
.assign (str
, i
);
4846 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4847 EXPECT ("function"));
4851 /* While "w" is a prefix of both components, the match function
4852 should still only be called once. */
4854 CHECK_MATCH ("w", symbol_name_match_type::FULL
, true,
4856 CHECK_MATCH ("w", symbol_name_match_type::WILD
, true,
4860 /* Same, with a "complicated" symbol. */
4862 static const char str
[] = Z_SYM_NAME
;
4863 size_t len
= strlen (str
);
4866 for (size_t i
= 1; i
< len
; i
++)
4868 lookup
.assign (str
, i
);
4869 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4870 EXPECT (Z_SYM_NAME
));
4874 /* In FULL mode, an incomplete symbol doesn't match. */
4876 CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL
, false,
4880 /* A complete symbol with parameters matches any overload, since the
4881 index has no overload info. */
4883 CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL
, true,
4884 EXPECT ("std::zfunction", "std::zfunction2"));
4885 CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD
, true,
4886 EXPECT ("std::zfunction", "std::zfunction2"));
4887 CHECK_MATCH ("zfunc", symbol_name_match_type::WILD
, true,
4888 EXPECT ("std::zfunction", "std::zfunction2"));
4891 /* Check that whitespace is ignored appropriately. A symbol with a
4892 template argument list. */
4894 static const char expected
[] = "ns::foo<int>";
4895 CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL
, false,
4897 CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD
, false,
4901 /* Check that whitespace is ignored appropriately. A symbol with a
4902 template argument list that includes a pointer. */
4904 static const char expected
[] = "ns::foo<char*>";
4905 /* Try both completion and non-completion modes. */
4906 static const bool completion_mode
[2] = {false, true};
4907 for (size_t i
= 0; i
< 2; i
++)
4909 CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL
,
4910 completion_mode
[i
], EXPECT (expected
));
4911 CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD
,
4912 completion_mode
[i
], EXPECT (expected
));
4914 CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL
,
4915 completion_mode
[i
], EXPECT (expected
));
4916 CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD
,
4917 completion_mode
[i
], EXPECT (expected
));
4922 /* Check method qualifiers are ignored. */
4923 static const char expected
[] = "ns::foo<char*>";
4924 CHECK_MATCH ("ns :: foo < char * > ( int ) const",
4925 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4926 CHECK_MATCH ("ns :: foo < char * > ( int ) &&",
4927 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4928 CHECK_MATCH ("foo < char * > ( int ) const",
4929 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4930 CHECK_MATCH ("foo < char * > ( int ) &&",
4931 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4934 /* Test lookup names that don't match anything. */
4936 CHECK_MATCH ("bar2", symbol_name_match_type::WILD
, false,
4939 CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL
, false,
4943 /* Some wild matching tests, exercising "(anonymous namespace)",
4944 which should not be confused with a parameter list. */
4946 static const char *syms
[] = {
4950 "A :: B :: C ( int )",
4955 for (const char *s
: syms
)
4957 CHECK_MATCH (s
, symbol_name_match_type::WILD
, false,
4958 EXPECT ("(anonymous namespace)::A::B::C"));
4963 static const char expected
[] = "ns2::tmpl<int>::foo2";
4964 CHECK_MATCH ("tmp", symbol_name_match_type::WILD
, true,
4966 CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD
, true,
4970 SELF_CHECK (!any_mismatch
);
4979 test_mapped_index_find_name_component_bounds ();
4980 test_dw2_expand_symtabs_matching_symbol ();
4983 }} // namespace selftests::dw2_expand_symtabs_matching
4985 #endif /* GDB_SELF_TEST */
4987 /* If FILE_MATCHER is NULL or if PER_CU has
4988 dwarf2_per_cu_quick_data::MARK set (see
4989 dw_expand_symtabs_matching_file_matcher), expand the CU and call
4990 EXPANSION_NOTIFY on it. */
4993 dw2_expand_symtabs_matching_one
4994 (struct dwarf2_per_cu_data
*per_cu
,
4995 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4996 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
)
4998 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
5000 bool symtab_was_null
5001 = (per_cu
->v
.quick
->compunit_symtab
== NULL
);
5003 dw2_instantiate_symtab (per_cu
);
5005 if (expansion_notify
!= NULL
5007 && per_cu
->v
.quick
->compunit_symtab
!= NULL
)
5008 expansion_notify (per_cu
->v
.quick
->compunit_symtab
);
5012 /* Helper for dw2_expand_matching symtabs. Called on each symbol
5013 matched, to expand corresponding CUs that were marked. IDX is the
5014 index of the symbol name that matched. */
5017 dw2_expand_marked_cus
5018 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, offset_type idx
,
5019 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5020 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5023 offset_type
*vec
, vec_len
, vec_idx
;
5024 bool global_seen
= false;
5025 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
5027 vec
= (offset_type
*) (index
.constant_pool
5028 + MAYBE_SWAP (index
.symbol_table
[idx
].vec
));
5029 vec_len
= MAYBE_SWAP (vec
[0]);
5030 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
5032 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
5033 /* This value is only valid for index versions >= 7. */
5034 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
5035 gdb_index_symbol_kind symbol_kind
=
5036 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
5037 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
5038 /* Only check the symbol attributes if they're present.
5039 Indices prior to version 7 don't record them,
5040 and indices >= 7 may elide them for certain symbols
5041 (gold does this). */
5044 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
5046 /* Work around gold/15646. */
5049 if (!is_static
&& global_seen
)
5055 /* Only check the symbol's kind if it has one. */
5060 case VARIABLES_DOMAIN
:
5061 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
5064 case FUNCTIONS_DOMAIN
:
5065 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
5069 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
5077 /* Don't crash on bad data. */
5078 if (cu_index
>= (dwarf2_per_objfile
->all_comp_units
.size ()
5079 + dwarf2_per_objfile
->all_type_units
.size ()))
5081 complaint (&symfile_complaints
,
5082 _(".gdb_index entry has bad CU index"
5084 objfile_name (dwarf2_per_objfile
->objfile
));
5088 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
5089 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
5094 /* If FILE_MATCHER is non-NULL, set all the
5095 dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE
5096 that match FILE_MATCHER. */
5099 dw_expand_symtabs_matching_file_matcher
5100 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5101 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
)
5103 if (file_matcher
== NULL
)
5106 objfile
*const objfile
= dwarf2_per_objfile
->objfile
;
5108 htab_up
visited_found (htab_create_alloc (10, htab_hash_pointer
,
5110 NULL
, xcalloc
, xfree
));
5111 htab_up
visited_not_found (htab_create_alloc (10, htab_hash_pointer
,
5113 NULL
, xcalloc
, xfree
));
5115 /* The rule is CUs specify all the files, including those used by
5116 any TU, so there's no need to scan TUs here. */
5118 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5122 per_cu
->v
.quick
->mark
= 0;
5124 /* We only need to look at symtabs not already expanded. */
5125 if (per_cu
->v
.quick
->compunit_symtab
)
5128 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
5129 if (file_data
== NULL
)
5132 if (htab_find (visited_not_found
.get (), file_data
) != NULL
)
5134 else if (htab_find (visited_found
.get (), file_data
) != NULL
)
5136 per_cu
->v
.quick
->mark
= 1;
5140 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
5142 const char *this_real_name
;
5144 if (file_matcher (file_data
->file_names
[j
], false))
5146 per_cu
->v
.quick
->mark
= 1;
5150 /* Before we invoke realpath, which can get expensive when many
5151 files are involved, do a quick comparison of the basenames. */
5152 if (!basenames_may_differ
5153 && !file_matcher (lbasename (file_data
->file_names
[j
]),
5157 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
5158 if (file_matcher (this_real_name
, false))
5160 per_cu
->v
.quick
->mark
= 1;
5165 void **slot
= htab_find_slot (per_cu
->v
.quick
->mark
5166 ? visited_found
.get ()
5167 : visited_not_found
.get (),
5174 dw2_expand_symtabs_matching
5175 (struct objfile
*objfile
,
5176 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5177 const lookup_name_info
&lookup_name
,
5178 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
5179 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5180 enum search_domain kind
)
5182 struct dwarf2_per_objfile
*dwarf2_per_objfile
5183 = get_dwarf2_per_objfile (objfile
);
5185 /* index_table is NULL if OBJF_READNOW. */
5186 if (!dwarf2_per_objfile
->index_table
)
5189 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
5191 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
5193 dw2_expand_symtabs_matching_symbol (index
, lookup_name
,
5195 kind
, [&] (offset_type idx
)
5197 dw2_expand_marked_cus (dwarf2_per_objfile
, idx
, file_matcher
,
5198 expansion_notify
, kind
);
5202 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
5205 static struct compunit_symtab
*
5206 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
5211 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
5212 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
5215 if (cust
->includes
== NULL
)
5218 for (i
= 0; cust
->includes
[i
]; ++i
)
5220 struct compunit_symtab
*s
= cust
->includes
[i
];
5222 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
5230 static struct compunit_symtab
*
5231 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
5232 struct bound_minimal_symbol msymbol
,
5234 struct obj_section
*section
,
5237 struct dwarf2_per_cu_data
*data
;
5238 struct compunit_symtab
*result
;
5240 if (!objfile
->psymtabs_addrmap
)
5243 data
= (struct dwarf2_per_cu_data
*) addrmap_find (objfile
->psymtabs_addrmap
,
5248 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
5249 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
5250 paddress (get_objfile_arch (objfile
), pc
));
5253 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
),
5255 gdb_assert (result
!= NULL
);
5260 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
5261 void *data
, int need_fullname
)
5263 struct dwarf2_per_objfile
*dwarf2_per_objfile
5264 = get_dwarf2_per_objfile (objfile
);
5266 if (!dwarf2_per_objfile
->filenames_cache
)
5268 dwarf2_per_objfile
->filenames_cache
.emplace ();
5270 htab_up
visited (htab_create_alloc (10,
5271 htab_hash_pointer
, htab_eq_pointer
,
5272 NULL
, xcalloc
, xfree
));
5274 /* The rule is CUs specify all the files, including those used
5275 by any TU, so there's no need to scan TUs here. We can
5276 ignore file names coming from already-expanded CUs. */
5278 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5280 if (per_cu
->v
.quick
->compunit_symtab
)
5282 void **slot
= htab_find_slot (visited
.get (),
5283 per_cu
->v
.quick
->file_names
,
5286 *slot
= per_cu
->v
.quick
->file_names
;
5290 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5292 /* We only need to look at symtabs not already expanded. */
5293 if (per_cu
->v
.quick
->compunit_symtab
)
5296 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
5297 if (file_data
== NULL
)
5300 void **slot
= htab_find_slot (visited
.get (), file_data
, INSERT
);
5303 /* Already visited. */
5308 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
5310 const char *filename
= file_data
->file_names
[j
];
5311 dwarf2_per_objfile
->filenames_cache
->seen (filename
);
5316 dwarf2_per_objfile
->filenames_cache
->traverse ([&] (const char *filename
)
5318 gdb::unique_xmalloc_ptr
<char> this_real_name
;
5321 this_real_name
= gdb_realpath (filename
);
5322 (*fun
) (filename
, this_real_name
.get (), data
);
5327 dw2_has_symbols (struct objfile
*objfile
)
5332 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
5335 dw2_find_last_source_symtab
,
5336 dw2_forget_cached_source_info
,
5337 dw2_map_symtabs_matching_filename
,
5342 dw2_expand_symtabs_for_function
,
5343 dw2_expand_all_symtabs
,
5344 dw2_expand_symtabs_with_fullname
,
5345 dw2_map_matching_symbols
,
5346 dw2_expand_symtabs_matching
,
5347 dw2_find_pc_sect_compunit_symtab
,
5349 dw2_map_symbol_filenames
5352 /* DWARF-5 debug_names reader. */
5354 /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */
5355 static const gdb_byte dwarf5_augmentation
[] = { 'G', 'D', 'B', 0 };
5357 /* A helper function that reads the .debug_names section in SECTION
5358 and fills in MAP. FILENAME is the name of the file containing the
5359 section; it is used for error reporting.
5361 Returns true if all went well, false otherwise. */
5364 read_debug_names_from_section (struct objfile
*objfile
,
5365 const char *filename
,
5366 struct dwarf2_section_info
*section
,
5367 mapped_debug_names
&map
)
5369 if (dwarf2_section_empty_p (section
))
5372 /* Older elfutils strip versions could keep the section in the main
5373 executable while splitting it for the separate debug info file. */
5374 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
5377 dwarf2_read_section (objfile
, section
);
5379 map
.dwarf5_byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
5381 const gdb_byte
*addr
= section
->buffer
;
5383 bfd
*const abfd
= get_section_bfd_owner (section
);
5385 unsigned int bytes_read
;
5386 LONGEST length
= read_initial_length (abfd
, addr
, &bytes_read
);
5389 map
.dwarf5_is_dwarf64
= bytes_read
!= 4;
5390 map
.offset_size
= map
.dwarf5_is_dwarf64
? 8 : 4;
5391 if (bytes_read
+ length
!= section
->size
)
5393 /* There may be multiple per-CU indices. */
5394 warning (_("Section .debug_names in %s length %s does not match "
5395 "section length %s, ignoring .debug_names."),
5396 filename
, plongest (bytes_read
+ length
),
5397 pulongest (section
->size
));
5401 /* The version number. */
5402 uint16_t version
= read_2_bytes (abfd
, addr
);
5406 warning (_("Section .debug_names in %s has unsupported version %d, "
5407 "ignoring .debug_names."),
5413 uint16_t padding
= read_2_bytes (abfd
, addr
);
5417 warning (_("Section .debug_names in %s has unsupported padding %d, "
5418 "ignoring .debug_names."),
5423 /* comp_unit_count - The number of CUs in the CU list. */
5424 map
.cu_count
= read_4_bytes (abfd
, addr
);
5427 /* local_type_unit_count - The number of TUs in the local TU
5429 map
.tu_count
= read_4_bytes (abfd
, addr
);
5432 /* foreign_type_unit_count - The number of TUs in the foreign TU
5434 uint32_t foreign_tu_count
= read_4_bytes (abfd
, addr
);
5436 if (foreign_tu_count
!= 0)
5438 warning (_("Section .debug_names in %s has unsupported %lu foreign TUs, "
5439 "ignoring .debug_names."),
5440 filename
, static_cast<unsigned long> (foreign_tu_count
));
5444 /* bucket_count - The number of hash buckets in the hash lookup
5446 map
.bucket_count
= read_4_bytes (abfd
, addr
);
5449 /* name_count - The number of unique names in the index. */
5450 map
.name_count
= read_4_bytes (abfd
, addr
);
5453 /* abbrev_table_size - The size in bytes of the abbreviations
5455 uint32_t abbrev_table_size
= read_4_bytes (abfd
, addr
);
5458 /* augmentation_string_size - The size in bytes of the augmentation
5459 string. This value is rounded up to a multiple of 4. */
5460 uint32_t augmentation_string_size
= read_4_bytes (abfd
, addr
);
5462 map
.augmentation_is_gdb
= ((augmentation_string_size
5463 == sizeof (dwarf5_augmentation
))
5464 && memcmp (addr
, dwarf5_augmentation
,
5465 sizeof (dwarf5_augmentation
)) == 0);
5466 augmentation_string_size
+= (-augmentation_string_size
) & 3;
5467 addr
+= augmentation_string_size
;
5470 map
.cu_table_reordered
= addr
;
5471 addr
+= map
.cu_count
* map
.offset_size
;
5473 /* List of Local TUs */
5474 map
.tu_table_reordered
= addr
;
5475 addr
+= map
.tu_count
* map
.offset_size
;
5477 /* Hash Lookup Table */
5478 map
.bucket_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5479 addr
+= map
.bucket_count
* 4;
5480 map
.hash_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5481 addr
+= map
.name_count
* 4;
5484 map
.name_table_string_offs_reordered
= addr
;
5485 addr
+= map
.name_count
* map
.offset_size
;
5486 map
.name_table_entry_offs_reordered
= addr
;
5487 addr
+= map
.name_count
* map
.offset_size
;
5489 const gdb_byte
*abbrev_table_start
= addr
;
5492 unsigned int bytes_read
;
5493 const ULONGEST index_num
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5498 const auto insertpair
5499 = map
.abbrev_map
.emplace (index_num
, mapped_debug_names::index_val ());
5500 if (!insertpair
.second
)
5502 warning (_("Section .debug_names in %s has duplicate index %s, "
5503 "ignoring .debug_names."),
5504 filename
, pulongest (index_num
));
5507 mapped_debug_names::index_val
&indexval
= insertpair
.first
->second
;
5508 indexval
.dwarf_tag
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5513 mapped_debug_names::index_val::attr attr
;
5514 attr
.dw_idx
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5516 attr
.form
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5518 if (attr
.form
== DW_FORM_implicit_const
)
5520 attr
.implicit_const
= read_signed_leb128 (abfd
, addr
,
5524 if (attr
.dw_idx
== 0 && attr
.form
== 0)
5526 indexval
.attr_vec
.push_back (std::move (attr
));
5529 if (addr
!= abbrev_table_start
+ abbrev_table_size
)
5531 warning (_("Section .debug_names in %s has abbreviation_table "
5532 "of size %zu vs. written as %u, ignoring .debug_names."),
5533 filename
, addr
- abbrev_table_start
, abbrev_table_size
);
5536 map
.entry_pool
= addr
;
5541 /* A helper for create_cus_from_debug_names that handles the MAP's CU
5545 create_cus_from_debug_names_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5546 const mapped_debug_names
&map
,
5547 dwarf2_section_info
§ion
,
5550 sect_offset sect_off_prev
;
5551 for (uint32_t i
= 0; i
<= map
.cu_count
; ++i
)
5553 sect_offset sect_off_next
;
5554 if (i
< map
.cu_count
)
5557 = (sect_offset
) (extract_unsigned_integer
5558 (map
.cu_table_reordered
+ i
* map
.offset_size
,
5560 map
.dwarf5_byte_order
));
5563 sect_off_next
= (sect_offset
) section
.size
;
5566 const ULONGEST length
= sect_off_next
- sect_off_prev
;
5567 dwarf2_per_cu_data
*per_cu
5568 = create_cu_from_index_list (dwarf2_per_objfile
, §ion
, is_dwz
,
5569 sect_off_prev
, length
);
5570 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
5572 sect_off_prev
= sect_off_next
;
5576 /* Read the CU list from the mapped index, and use it to create all
5577 the CU objects for this dwarf2_per_objfile. */
5580 create_cus_from_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5581 const mapped_debug_names
&map
,
5582 const mapped_debug_names
&dwz_map
)
5584 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
5585 dwarf2_per_objfile
->all_comp_units
.reserve (map
.cu_count
+ dwz_map
.cu_count
);
5587 create_cus_from_debug_names_list (dwarf2_per_objfile
, map
,
5588 dwarf2_per_objfile
->info
,
5589 false /* is_dwz */);
5591 if (dwz_map
.cu_count
== 0)
5594 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5595 create_cus_from_debug_names_list (dwarf2_per_objfile
, dwz_map
, dwz
->info
,
5599 /* Read .debug_names. If everything went ok, initialize the "quick"
5600 elements of all the CUs and return true. Otherwise, return false. */
5603 dwarf2_read_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
5605 mapped_debug_names
local_map (dwarf2_per_objfile
);
5606 mapped_debug_names
dwz_map (dwarf2_per_objfile
);
5607 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5609 if (!read_debug_names_from_section (objfile
, objfile_name (objfile
),
5610 &dwarf2_per_objfile
->debug_names
,
5614 /* Don't use the index if it's empty. */
5615 if (local_map
.name_count
== 0)
5618 /* If there is a .dwz file, read it so we can get its CU list as
5620 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5623 if (!read_debug_names_from_section (objfile
,
5624 bfd_get_filename (dwz
->dwz_bfd
),
5625 &dwz
->debug_names
, dwz_map
))
5627 warning (_("could not read '.debug_names' section from %s; skipping"),
5628 bfd_get_filename (dwz
->dwz_bfd
));
5633 create_cus_from_debug_names (dwarf2_per_objfile
, local_map
, dwz_map
);
5635 if (local_map
.tu_count
!= 0)
5637 /* We can only handle a single .debug_types when we have an
5639 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
5642 dwarf2_section_info
*section
= VEC_index (dwarf2_section_info_def
,
5643 dwarf2_per_objfile
->types
, 0);
5645 create_signatured_type_table_from_debug_names
5646 (dwarf2_per_objfile
, local_map
, section
, &dwarf2_per_objfile
->abbrev
);
5649 create_addrmap_from_aranges (dwarf2_per_objfile
,
5650 &dwarf2_per_objfile
->debug_aranges
);
5652 dwarf2_per_objfile
->debug_names_table
.reset
5653 (new mapped_debug_names (dwarf2_per_objfile
));
5654 *dwarf2_per_objfile
->debug_names_table
= std::move (local_map
);
5655 dwarf2_per_objfile
->using_index
= 1;
5656 dwarf2_per_objfile
->quick_file_names_table
=
5657 create_quick_file_names_table (dwarf2_per_objfile
->all_comp_units
.size ());
5662 /* Type used to manage iterating over all CUs looking for a symbol for
5665 class dw2_debug_names_iterator
5668 /* If WANT_SPECIFIC_BLOCK is true, only look for symbols in block
5669 BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
5670 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5671 bool want_specific_block
,
5672 block_enum block_index
, domain_enum domain
,
5674 : m_map (map
), m_want_specific_block (want_specific_block
),
5675 m_block_index (block_index
), m_domain (domain
),
5676 m_addr (find_vec_in_debug_names (map
, name
))
5679 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5680 search_domain search
, uint32_t namei
)
5683 m_addr (find_vec_in_debug_names (map
, namei
))
5686 /* Return the next matching CU or NULL if there are no more. */
5687 dwarf2_per_cu_data
*next ();
5690 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5692 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5695 /* The internalized form of .debug_names. */
5696 const mapped_debug_names
&m_map
;
5698 /* If true, only look for symbols that match BLOCK_INDEX. */
5699 const bool m_want_specific_block
= false;
5701 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
5702 Unused if !WANT_SPECIFIC_BLOCK - FIRST_LOCAL_BLOCK is an invalid
5704 const block_enum m_block_index
= FIRST_LOCAL_BLOCK
;
5706 /* The kind of symbol we're looking for. */
5707 const domain_enum m_domain
= UNDEF_DOMAIN
;
5708 const search_domain m_search
= ALL_DOMAIN
;
5710 /* The list of CUs from the index entry of the symbol, or NULL if
5712 const gdb_byte
*m_addr
;
5716 mapped_debug_names::namei_to_name (uint32_t namei
) const
5718 const ULONGEST namei_string_offs
5719 = extract_unsigned_integer ((name_table_string_offs_reordered
5720 + namei
* offset_size
),
5723 return read_indirect_string_at_offset
5724 (dwarf2_per_objfile
, dwarf2_per_objfile
->objfile
->obfd
, namei_string_offs
);
5727 /* Find a slot in .debug_names for the object named NAME. If NAME is
5728 found, return pointer to its pool data. If NAME cannot be found,
5732 dw2_debug_names_iterator::find_vec_in_debug_names
5733 (const mapped_debug_names
&map
, const char *name
)
5735 int (*cmp
) (const char *, const char *);
5737 if (current_language
->la_language
== language_cplus
5738 || current_language
->la_language
== language_fortran
5739 || current_language
->la_language
== language_d
)
5741 /* NAME is already canonical. Drop any qualifiers as
5742 .debug_names does not contain any. */
5744 if (strchr (name
, '(') != NULL
)
5746 gdb::unique_xmalloc_ptr
<char> without_params
5747 = cp_remove_params (name
);
5749 if (without_params
!= NULL
)
5751 name
= without_params
.get();
5756 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
5758 const uint32_t full_hash
= dwarf5_djb_hash (name
);
5760 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5761 (map
.bucket_table_reordered
5762 + (full_hash
% map
.bucket_count
)), 4,
5763 map
.dwarf5_byte_order
);
5767 if (namei
>= map
.name_count
)
5769 complaint (&symfile_complaints
,
5770 _("Wrong .debug_names with name index %u but name_count=%u "
5772 namei
, map
.name_count
,
5773 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5779 const uint32_t namei_full_hash
5780 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5781 (map
.hash_table_reordered
+ namei
), 4,
5782 map
.dwarf5_byte_order
);
5783 if (full_hash
% map
.bucket_count
!= namei_full_hash
% map
.bucket_count
)
5786 if (full_hash
== namei_full_hash
)
5788 const char *const namei_string
= map
.namei_to_name (namei
);
5790 #if 0 /* An expensive sanity check. */
5791 if (namei_full_hash
!= dwarf5_djb_hash (namei_string
))
5793 complaint (&symfile_complaints
,
5794 _("Wrong .debug_names hash for string at index %u "
5796 namei
, objfile_name (dwarf2_per_objfile
->objfile
));
5801 if (cmp (namei_string
, name
) == 0)
5803 const ULONGEST namei_entry_offs
5804 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5805 + namei
* map
.offset_size
),
5806 map
.offset_size
, map
.dwarf5_byte_order
);
5807 return map
.entry_pool
+ namei_entry_offs
;
5812 if (namei
>= map
.name_count
)
5818 dw2_debug_names_iterator::find_vec_in_debug_names
5819 (const mapped_debug_names
&map
, uint32_t namei
)
5821 if (namei
>= map
.name_count
)
5823 complaint (&symfile_complaints
,
5824 _("Wrong .debug_names with name index %u but name_count=%u "
5826 namei
, map
.name_count
,
5827 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5831 const ULONGEST namei_entry_offs
5832 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5833 + namei
* map
.offset_size
),
5834 map
.offset_size
, map
.dwarf5_byte_order
);
5835 return map
.entry_pool
+ namei_entry_offs
;
5838 /* See dw2_debug_names_iterator. */
5840 dwarf2_per_cu_data
*
5841 dw2_debug_names_iterator::next ()
5846 struct dwarf2_per_objfile
*dwarf2_per_objfile
= m_map
.dwarf2_per_objfile
;
5847 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5848 bfd
*const abfd
= objfile
->obfd
;
5852 unsigned int bytes_read
;
5853 const ULONGEST abbrev
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5854 m_addr
+= bytes_read
;
5858 const auto indexval_it
= m_map
.abbrev_map
.find (abbrev
);
5859 if (indexval_it
== m_map
.abbrev_map
.cend ())
5861 complaint (&symfile_complaints
,
5862 _("Wrong .debug_names undefined abbrev code %s "
5864 pulongest (abbrev
), objfile_name (objfile
));
5867 const mapped_debug_names::index_val
&indexval
= indexval_it
->second
;
5868 bool have_is_static
= false;
5870 dwarf2_per_cu_data
*per_cu
= NULL
;
5871 for (const mapped_debug_names::index_val::attr
&attr
: indexval
.attr_vec
)
5876 case DW_FORM_implicit_const
:
5877 ull
= attr
.implicit_const
;
5879 case DW_FORM_flag_present
:
5883 ull
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5884 m_addr
+= bytes_read
;
5887 complaint (&symfile_complaints
,
5888 _("Unsupported .debug_names form %s [in module %s]"),
5889 dwarf_form_name (attr
.form
),
5890 objfile_name (objfile
));
5893 switch (attr
.dw_idx
)
5895 case DW_IDX_compile_unit
:
5896 /* Don't crash on bad data. */
5897 if (ull
>= dwarf2_per_objfile
->all_comp_units
.size ())
5899 complaint (&symfile_complaints
,
5900 _(".debug_names entry has bad CU index %s"
5903 objfile_name (dwarf2_per_objfile
->objfile
));
5906 per_cu
= dwarf2_per_objfile
->get_cutu (ull
);
5908 case DW_IDX_type_unit
:
5909 /* Don't crash on bad data. */
5910 if (ull
>= dwarf2_per_objfile
->all_type_units
.size ())
5912 complaint (&symfile_complaints
,
5913 _(".debug_names entry has bad TU index %s"
5916 objfile_name (dwarf2_per_objfile
->objfile
));
5919 per_cu
= &dwarf2_per_objfile
->get_tu (ull
)->per_cu
;
5921 case DW_IDX_GNU_internal
:
5922 if (!m_map
.augmentation_is_gdb
)
5924 have_is_static
= true;
5927 case DW_IDX_GNU_external
:
5928 if (!m_map
.augmentation_is_gdb
)
5930 have_is_static
= true;
5936 /* Skip if already read in. */
5937 if (per_cu
->v
.quick
->compunit_symtab
)
5940 /* Check static vs global. */
5943 const bool want_static
= m_block_index
!= GLOBAL_BLOCK
;
5944 if (m_want_specific_block
&& want_static
!= is_static
)
5948 /* Match dw2_symtab_iter_next, symbol_kind
5949 and debug_names::psymbol_tag. */
5953 switch (indexval
.dwarf_tag
)
5955 case DW_TAG_variable
:
5956 case DW_TAG_subprogram
:
5957 /* Some types are also in VAR_DOMAIN. */
5958 case DW_TAG_typedef
:
5959 case DW_TAG_structure_type
:
5966 switch (indexval
.dwarf_tag
)
5968 case DW_TAG_typedef
:
5969 case DW_TAG_structure_type
:
5976 switch (indexval
.dwarf_tag
)
5979 case DW_TAG_variable
:
5989 /* Match dw2_expand_symtabs_matching, symbol_kind and
5990 debug_names::psymbol_tag. */
5993 case VARIABLES_DOMAIN
:
5994 switch (indexval
.dwarf_tag
)
5996 case DW_TAG_variable
:
6002 case FUNCTIONS_DOMAIN
:
6003 switch (indexval
.dwarf_tag
)
6005 case DW_TAG_subprogram
:
6012 switch (indexval
.dwarf_tag
)
6014 case DW_TAG_typedef
:
6015 case DW_TAG_structure_type
:
6028 static struct compunit_symtab
*
6029 dw2_debug_names_lookup_symbol (struct objfile
*objfile
, int block_index_int
,
6030 const char *name
, domain_enum domain
)
6032 const block_enum block_index
= static_cast<block_enum
> (block_index_int
);
6033 struct dwarf2_per_objfile
*dwarf2_per_objfile
6034 = get_dwarf2_per_objfile (objfile
);
6036 const auto &mapp
= dwarf2_per_objfile
->debug_names_table
;
6039 /* index is NULL if OBJF_READNOW. */
6042 const auto &map
= *mapp
;
6044 dw2_debug_names_iterator
iter (map
, true /* want_specific_block */,
6045 block_index
, domain
, name
);
6047 struct compunit_symtab
*stab_best
= NULL
;
6048 struct dwarf2_per_cu_data
*per_cu
;
6049 while ((per_cu
= iter
.next ()) != NULL
)
6051 struct symbol
*sym
, *with_opaque
= NULL
;
6052 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
);
6053 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
6054 struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
6056 sym
= block_find_symbol (block
, name
, domain
,
6057 block_find_non_opaque_type_preferred
,
6060 /* Some caution must be observed with overloaded functions and
6061 methods, since the index will not contain any overload
6062 information (but NAME might contain it). */
6065 && strcmp_iw (SYMBOL_SEARCH_NAME (sym
), name
) == 0)
6067 if (with_opaque
!= NULL
6068 && strcmp_iw (SYMBOL_SEARCH_NAME (with_opaque
), name
) == 0)
6071 /* Keep looking through other CUs. */
6077 /* This dumps minimal information about .debug_names. It is called
6078 via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase
6079 uses this to verify that .debug_names has been loaded. */
6082 dw2_debug_names_dump (struct objfile
*objfile
)
6084 struct dwarf2_per_objfile
*dwarf2_per_objfile
6085 = get_dwarf2_per_objfile (objfile
);
6087 gdb_assert (dwarf2_per_objfile
->using_index
);
6088 printf_filtered (".debug_names:");
6089 if (dwarf2_per_objfile
->debug_names_table
)
6090 printf_filtered (" exists\n");
6092 printf_filtered (" faked for \"readnow\"\n");
6093 printf_filtered ("\n");
6097 dw2_debug_names_expand_symtabs_for_function (struct objfile
*objfile
,
6098 const char *func_name
)
6100 struct dwarf2_per_objfile
*dwarf2_per_objfile
6101 = get_dwarf2_per_objfile (objfile
);
6103 /* dwarf2_per_objfile->debug_names_table is NULL if OBJF_READNOW. */
6104 if (dwarf2_per_objfile
->debug_names_table
)
6106 const mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
6108 /* Note: It doesn't matter what we pass for block_index here. */
6109 dw2_debug_names_iterator
iter (map
, false /* want_specific_block */,
6110 GLOBAL_BLOCK
, VAR_DOMAIN
, func_name
);
6112 struct dwarf2_per_cu_data
*per_cu
;
6113 while ((per_cu
= iter
.next ()) != NULL
)
6114 dw2_instantiate_symtab (per_cu
);
6119 dw2_debug_names_expand_symtabs_matching
6120 (struct objfile
*objfile
,
6121 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
6122 const lookup_name_info
&lookup_name
,
6123 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
6124 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
6125 enum search_domain kind
)
6127 struct dwarf2_per_objfile
*dwarf2_per_objfile
6128 = get_dwarf2_per_objfile (objfile
);
6130 /* debug_names_table is NULL if OBJF_READNOW. */
6131 if (!dwarf2_per_objfile
->debug_names_table
)
6134 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
6136 mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
6138 dw2_expand_symtabs_matching_symbol (map
, lookup_name
,
6140 kind
, [&] (offset_type namei
)
6142 /* The name was matched, now expand corresponding CUs that were
6144 dw2_debug_names_iterator
iter (map
, kind
, namei
);
6146 struct dwarf2_per_cu_data
*per_cu
;
6147 while ((per_cu
= iter
.next ()) != NULL
)
6148 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
6153 const struct quick_symbol_functions dwarf2_debug_names_functions
=
6156 dw2_find_last_source_symtab
,
6157 dw2_forget_cached_source_info
,
6158 dw2_map_symtabs_matching_filename
,
6159 dw2_debug_names_lookup_symbol
,
6161 dw2_debug_names_dump
,
6163 dw2_debug_names_expand_symtabs_for_function
,
6164 dw2_expand_all_symtabs
,
6165 dw2_expand_symtabs_with_fullname
,
6166 dw2_map_matching_symbols
,
6167 dw2_debug_names_expand_symtabs_matching
,
6168 dw2_find_pc_sect_compunit_symtab
,
6170 dw2_map_symbol_filenames
6173 /* See symfile.h. */
6176 dwarf2_initialize_objfile (struct objfile
*objfile
, dw_index_kind
*index_kind
)
6178 struct dwarf2_per_objfile
*dwarf2_per_objfile
6179 = get_dwarf2_per_objfile (objfile
);
6181 /* If we're about to read full symbols, don't bother with the
6182 indices. In this case we also don't care if some other debug
6183 format is making psymtabs, because they are all about to be
6185 if ((objfile
->flags
& OBJF_READNOW
))
6187 dwarf2_per_objfile
->using_index
= 1;
6188 create_all_comp_units (dwarf2_per_objfile
);
6189 create_all_type_units (dwarf2_per_objfile
);
6190 dwarf2_per_objfile
->quick_file_names_table
6191 = create_quick_file_names_table
6192 (dwarf2_per_objfile
->all_comp_units
.size ());
6194 for (int i
= 0; i
< (dwarf2_per_objfile
->all_comp_units
.size ()
6195 + dwarf2_per_objfile
->all_type_units
.size ()); ++i
)
6197 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
6199 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6200 struct dwarf2_per_cu_quick_data
);
6203 /* Return 1 so that gdb sees the "quick" functions. However,
6204 these functions will be no-ops because we will have expanded
6206 *index_kind
= dw_index_kind::GDB_INDEX
;
6210 if (dwarf2_read_debug_names (dwarf2_per_objfile
))
6212 *index_kind
= dw_index_kind::DEBUG_NAMES
;
6216 if (dwarf2_read_index (dwarf2_per_objfile
))
6218 *index_kind
= dw_index_kind::GDB_INDEX
;
6227 /* Build a partial symbol table. */
6230 dwarf2_build_psymtabs (struct objfile
*objfile
)
6232 struct dwarf2_per_objfile
*dwarf2_per_objfile
6233 = get_dwarf2_per_objfile (objfile
);
6235 if (objfile
->global_psymbols
.capacity () == 0
6236 && objfile
->static_psymbols
.capacity () == 0)
6237 init_psymbol_list (objfile
, 1024);
6241 /* This isn't really ideal: all the data we allocate on the
6242 objfile's obstack is still uselessly kept around. However,
6243 freeing it seems unsafe. */
6244 psymtab_discarder
psymtabs (objfile
);
6245 dwarf2_build_psymtabs_hard (dwarf2_per_objfile
);
6248 CATCH (except
, RETURN_MASK_ERROR
)
6250 exception_print (gdb_stderr
, except
);
6255 /* Return the total length of the CU described by HEADER. */
6258 get_cu_length (const struct comp_unit_head
*header
)
6260 return header
->initial_length_size
+ header
->length
;
6263 /* Return TRUE if SECT_OFF is within CU_HEADER. */
6266 offset_in_cu_p (const comp_unit_head
*cu_header
, sect_offset sect_off
)
6268 sect_offset bottom
= cu_header
->sect_off
;
6269 sect_offset top
= cu_header
->sect_off
+ get_cu_length (cu_header
);
6271 return sect_off
>= bottom
&& sect_off
< top
;
6274 /* Find the base address of the compilation unit for range lists and
6275 location lists. It will normally be specified by DW_AT_low_pc.
6276 In DWARF-3 draft 4, the base address could be overridden by
6277 DW_AT_entry_pc. It's been removed, but GCC still uses this for
6278 compilation units with discontinuous ranges. */
6281 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
6283 struct attribute
*attr
;
6286 cu
->base_address
= 0;
6288 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
6291 cu
->base_address
= attr_value_as_address (attr
);
6296 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
6299 cu
->base_address
= attr_value_as_address (attr
);
6305 /* Read in the comp unit header information from the debug_info at info_ptr.
6306 Use rcuh_kind::COMPILE as the default type if not known by the caller.
6307 NOTE: This leaves members offset, first_die_offset to be filled in
6310 static const gdb_byte
*
6311 read_comp_unit_head (struct comp_unit_head
*cu_header
,
6312 const gdb_byte
*info_ptr
,
6313 struct dwarf2_section_info
*section
,
6314 rcuh_kind section_kind
)
6317 unsigned int bytes_read
;
6318 const char *filename
= get_section_file_name (section
);
6319 bfd
*abfd
= get_section_bfd_owner (section
);
6321 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
6322 cu_header
->initial_length_size
= bytes_read
;
6323 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
6324 info_ptr
+= bytes_read
;
6325 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
6327 if (cu_header
->version
< 5)
6328 switch (section_kind
)
6330 case rcuh_kind::COMPILE
:
6331 cu_header
->unit_type
= DW_UT_compile
;
6333 case rcuh_kind::TYPE
:
6334 cu_header
->unit_type
= DW_UT_type
;
6337 internal_error (__FILE__
, __LINE__
,
6338 _("read_comp_unit_head: invalid section_kind"));
6342 cu_header
->unit_type
= static_cast<enum dwarf_unit_type
>
6343 (read_1_byte (abfd
, info_ptr
));
6345 switch (cu_header
->unit_type
)
6348 if (section_kind
!= rcuh_kind::COMPILE
)
6349 error (_("Dwarf Error: wrong unit_type in compilation unit header "
6350 "(is DW_UT_compile, should be DW_UT_type) [in module %s]"),
6354 section_kind
= rcuh_kind::TYPE
;
6357 error (_("Dwarf Error: wrong unit_type in compilation unit header "
6358 "(is %d, should be %d or %d) [in module %s]"),
6359 cu_header
->unit_type
, DW_UT_compile
, DW_UT_type
, filename
);
6362 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
6365 cu_header
->abbrev_sect_off
= (sect_offset
) read_offset (abfd
, info_ptr
,
6368 info_ptr
+= bytes_read
;
6369 if (cu_header
->version
< 5)
6371 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
6374 signed_addr
= bfd_get_sign_extend_vma (abfd
);
6375 if (signed_addr
< 0)
6376 internal_error (__FILE__
, __LINE__
,
6377 _("read_comp_unit_head: dwarf from non elf file"));
6378 cu_header
->signed_addr_p
= signed_addr
;
6380 if (section_kind
== rcuh_kind::TYPE
)
6382 LONGEST type_offset
;
6384 cu_header
->signature
= read_8_bytes (abfd
, info_ptr
);
6387 type_offset
= read_offset (abfd
, info_ptr
, cu_header
, &bytes_read
);
6388 info_ptr
+= bytes_read
;
6389 cu_header
->type_cu_offset_in_tu
= (cu_offset
) type_offset
;
6390 if (to_underlying (cu_header
->type_cu_offset_in_tu
) != type_offset
)
6391 error (_("Dwarf Error: Too big type_offset in compilation unit "
6392 "header (is %s) [in module %s]"), plongest (type_offset
),
6399 /* Helper function that returns the proper abbrev section for
6402 static struct dwarf2_section_info
*
6403 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
6405 struct dwarf2_section_info
*abbrev
;
6406 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
6408 if (this_cu
->is_dwz
)
6409 abbrev
= &dwarf2_get_dwz_file (dwarf2_per_objfile
)->abbrev
;
6411 abbrev
= &dwarf2_per_objfile
->abbrev
;
6416 /* Subroutine of read_and_check_comp_unit_head and
6417 read_and_check_type_unit_head to simplify them.
6418 Perform various error checking on the header. */
6421 error_check_comp_unit_head (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6422 struct comp_unit_head
*header
,
6423 struct dwarf2_section_info
*section
,
6424 struct dwarf2_section_info
*abbrev_section
)
6426 const char *filename
= get_section_file_name (section
);
6428 if (header
->version
< 2 || header
->version
> 5)
6429 error (_("Dwarf Error: wrong version in compilation unit header "
6430 "(is %d, should be 2, 3, 4 or 5) [in module %s]"), header
->version
,
6433 if (to_underlying (header
->abbrev_sect_off
)
6434 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
6435 error (_("Dwarf Error: bad offset (%s) in compilation unit header "
6436 "(offset %s + 6) [in module %s]"),
6437 sect_offset_str (header
->abbrev_sect_off
),
6438 sect_offset_str (header
->sect_off
),
6441 /* Cast to ULONGEST to use 64-bit arithmetic when possible to
6442 avoid potential 32-bit overflow. */
6443 if (((ULONGEST
) header
->sect_off
+ get_cu_length (header
))
6445 error (_("Dwarf Error: bad length (0x%x) in compilation unit header "
6446 "(offset %s + 0) [in module %s]"),
6447 header
->length
, sect_offset_str (header
->sect_off
),
6451 /* Read in a CU/TU header and perform some basic error checking.
6452 The contents of the header are stored in HEADER.
6453 The result is a pointer to the start of the first DIE. */
6455 static const gdb_byte
*
6456 read_and_check_comp_unit_head (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6457 struct comp_unit_head
*header
,
6458 struct dwarf2_section_info
*section
,
6459 struct dwarf2_section_info
*abbrev_section
,
6460 const gdb_byte
*info_ptr
,
6461 rcuh_kind section_kind
)
6463 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
6465 header
->sect_off
= (sect_offset
) (beg_of_comp_unit
- section
->buffer
);
6467 info_ptr
= read_comp_unit_head (header
, info_ptr
, section
, section_kind
);
6469 header
->first_die_cu_offset
= (cu_offset
) (info_ptr
- beg_of_comp_unit
);
6471 error_check_comp_unit_head (dwarf2_per_objfile
, header
, section
,
6477 /* Fetch the abbreviation table offset from a comp or type unit header. */
6480 read_abbrev_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6481 struct dwarf2_section_info
*section
,
6482 sect_offset sect_off
)
6484 bfd
*abfd
= get_section_bfd_owner (section
);
6485 const gdb_byte
*info_ptr
;
6486 unsigned int initial_length_size
, offset_size
;
6489 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
6490 info_ptr
= section
->buffer
+ to_underlying (sect_off
);
6491 read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6492 offset_size
= initial_length_size
== 4 ? 4 : 8;
6493 info_ptr
+= initial_length_size
;
6495 version
= read_2_bytes (abfd
, info_ptr
);
6499 /* Skip unit type and address size. */
6503 return (sect_offset
) read_offset_1 (abfd
, info_ptr
, offset_size
);
6506 /* Allocate a new partial symtab for file named NAME and mark this new
6507 partial symtab as being an include of PST. */
6510 dwarf2_create_include_psymtab (const char *name
, struct partial_symtab
*pst
,
6511 struct objfile
*objfile
)
6513 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
6515 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
6517 /* It shares objfile->objfile_obstack. */
6518 subpst
->dirname
= pst
->dirname
;
6521 subpst
->textlow
= 0;
6522 subpst
->texthigh
= 0;
6524 subpst
->dependencies
6525 = XOBNEW (&objfile
->objfile_obstack
, struct partial_symtab
*);
6526 subpst
->dependencies
[0] = pst
;
6527 subpst
->number_of_dependencies
= 1;
6529 subpst
->globals_offset
= 0;
6530 subpst
->n_global_syms
= 0;
6531 subpst
->statics_offset
= 0;
6532 subpst
->n_static_syms
= 0;
6533 subpst
->compunit_symtab
= NULL
;
6534 subpst
->read_symtab
= pst
->read_symtab
;
6537 /* No private part is necessary for include psymtabs. This property
6538 can be used to differentiate between such include psymtabs and
6539 the regular ones. */
6540 subpst
->read_symtab_private
= NULL
;
6543 /* Read the Line Number Program data and extract the list of files
6544 included by the source file represented by PST. Build an include
6545 partial symtab for each of these included files. */
6548 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
6549 struct die_info
*die
,
6550 struct partial_symtab
*pst
)
6553 struct attribute
*attr
;
6555 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
6557 lh
= dwarf_decode_line_header ((sect_offset
) DW_UNSND (attr
), cu
);
6559 return; /* No linetable, so no includes. */
6561 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
6562 dwarf_decode_lines (lh
.get (), pst
->dirname
, cu
, pst
, pst
->textlow
, 1);
6566 hash_signatured_type (const void *item
)
6568 const struct signatured_type
*sig_type
6569 = (const struct signatured_type
*) item
;
6571 /* This drops the top 32 bits of the signature, but is ok for a hash. */
6572 return sig_type
->signature
;
6576 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
6578 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
6579 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
6581 return lhs
->signature
== rhs
->signature
;
6584 /* Allocate a hash table for signatured types. */
6587 allocate_signatured_type_table (struct objfile
*objfile
)
6589 return htab_create_alloc_ex (41,
6590 hash_signatured_type
,
6593 &objfile
->objfile_obstack
,
6594 hashtab_obstack_allocate
,
6595 dummy_obstack_deallocate
);
6598 /* A helper function to add a signatured type CU to a table. */
6601 add_signatured_type_cu_to_table (void **slot
, void *datum
)
6603 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
6604 std::vector
<signatured_type
*> *all_type_units
6605 = (std::vector
<signatured_type
*> *) datum
;
6607 all_type_units
->push_back (sigt
);
6612 /* A helper for create_debug_types_hash_table. Read types from SECTION
6613 and fill them into TYPES_HTAB. It will process only type units,
6614 therefore DW_UT_type. */
6617 create_debug_type_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6618 struct dwo_file
*dwo_file
,
6619 dwarf2_section_info
*section
, htab_t
&types_htab
,
6620 rcuh_kind section_kind
)
6622 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6623 struct dwarf2_section_info
*abbrev_section
;
6625 const gdb_byte
*info_ptr
, *end_ptr
;
6627 abbrev_section
= (dwo_file
!= NULL
6628 ? &dwo_file
->sections
.abbrev
6629 : &dwarf2_per_objfile
->abbrev
);
6631 if (dwarf_read_debug
)
6632 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
6633 get_section_name (section
),
6634 get_section_file_name (abbrev_section
));
6636 dwarf2_read_section (objfile
, section
);
6637 info_ptr
= section
->buffer
;
6639 if (info_ptr
== NULL
)
6642 /* We can't set abfd until now because the section may be empty or
6643 not present, in which case the bfd is unknown. */
6644 abfd
= get_section_bfd_owner (section
);
6646 /* We don't use init_cutu_and_read_dies_simple, or some such, here
6647 because we don't need to read any dies: the signature is in the
6650 end_ptr
= info_ptr
+ section
->size
;
6651 while (info_ptr
< end_ptr
)
6653 struct signatured_type
*sig_type
;
6654 struct dwo_unit
*dwo_tu
;
6656 const gdb_byte
*ptr
= info_ptr
;
6657 struct comp_unit_head header
;
6658 unsigned int length
;
6660 sect_offset sect_off
= (sect_offset
) (ptr
- section
->buffer
);
6662 /* Initialize it due to a false compiler warning. */
6663 header
.signature
= -1;
6664 header
.type_cu_offset_in_tu
= (cu_offset
) -1;
6666 /* We need to read the type's signature in order to build the hash
6667 table, but we don't need anything else just yet. */
6669 ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
, &header
, section
,
6670 abbrev_section
, ptr
, section_kind
);
6672 length
= get_cu_length (&header
);
6674 /* Skip dummy type units. */
6675 if (ptr
>= info_ptr
+ length
6676 || peek_abbrev_code (abfd
, ptr
) == 0
6677 || header
.unit_type
!= DW_UT_type
)
6683 if (types_htab
== NULL
)
6686 types_htab
= allocate_dwo_unit_table (objfile
);
6688 types_htab
= allocate_signatured_type_table (objfile
);
6694 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6696 dwo_tu
->dwo_file
= dwo_file
;
6697 dwo_tu
->signature
= header
.signature
;
6698 dwo_tu
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6699 dwo_tu
->section
= section
;
6700 dwo_tu
->sect_off
= sect_off
;
6701 dwo_tu
->length
= length
;
6705 /* N.B.: type_offset is not usable if this type uses a DWO file.
6706 The real type_offset is in the DWO file. */
6708 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6709 struct signatured_type
);
6710 sig_type
->signature
= header
.signature
;
6711 sig_type
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6712 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6713 sig_type
->per_cu
.is_debug_types
= 1;
6714 sig_type
->per_cu
.section
= section
;
6715 sig_type
->per_cu
.sect_off
= sect_off
;
6716 sig_type
->per_cu
.length
= length
;
6719 slot
= htab_find_slot (types_htab
,
6720 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
6722 gdb_assert (slot
!= NULL
);
6725 sect_offset dup_sect_off
;
6729 const struct dwo_unit
*dup_tu
6730 = (const struct dwo_unit
*) *slot
;
6732 dup_sect_off
= dup_tu
->sect_off
;
6736 const struct signatured_type
*dup_tu
6737 = (const struct signatured_type
*) *slot
;
6739 dup_sect_off
= dup_tu
->per_cu
.sect_off
;
6742 complaint (&symfile_complaints
,
6743 _("debug type entry at offset %s is duplicate to"
6744 " the entry at offset %s, signature %s"),
6745 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
6746 hex_string (header
.signature
));
6748 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
6750 if (dwarf_read_debug
> 1)
6751 fprintf_unfiltered (gdb_stdlog
, " offset %s, signature %s\n",
6752 sect_offset_str (sect_off
),
6753 hex_string (header
.signature
));
6759 /* Create the hash table of all entries in the .debug_types
6760 (or .debug_types.dwo) section(s).
6761 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
6762 otherwise it is NULL.
6764 The result is a pointer to the hash table or NULL if there are no types.
6766 Note: This function processes DWO files only, not DWP files. */
6769 create_debug_types_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6770 struct dwo_file
*dwo_file
,
6771 VEC (dwarf2_section_info_def
) *types
,
6775 struct dwarf2_section_info
*section
;
6777 if (VEC_empty (dwarf2_section_info_def
, types
))
6781 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
6783 create_debug_type_hash_table (dwarf2_per_objfile
, dwo_file
, section
,
6784 types_htab
, rcuh_kind::TYPE
);
6787 /* Create the hash table of all entries in the .debug_types section,
6788 and initialize all_type_units.
6789 The result is zero if there is an error (e.g. missing .debug_types section),
6790 otherwise non-zero. */
6793 create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
6795 htab_t types_htab
= NULL
;
6797 create_debug_type_hash_table (dwarf2_per_objfile
, NULL
,
6798 &dwarf2_per_objfile
->info
, types_htab
,
6799 rcuh_kind::COMPILE
);
6800 create_debug_types_hash_table (dwarf2_per_objfile
, NULL
,
6801 dwarf2_per_objfile
->types
, types_htab
);
6802 if (types_htab
== NULL
)
6804 dwarf2_per_objfile
->signatured_types
= NULL
;
6808 dwarf2_per_objfile
->signatured_types
= types_htab
;
6810 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
6811 dwarf2_per_objfile
->all_type_units
.reserve (htab_elements (types_htab
));
6813 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
,
6814 &dwarf2_per_objfile
->all_type_units
);
6819 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
6820 If SLOT is non-NULL, it is the entry to use in the hash table.
6821 Otherwise we find one. */
6823 static struct signatured_type
*
6824 add_type_unit (struct dwarf2_per_objfile
*dwarf2_per_objfile
, ULONGEST sig
,
6827 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6829 if (dwarf2_per_objfile
->all_type_units
.size ()
6830 == dwarf2_per_objfile
->all_type_units
.capacity ())
6831 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
6833 signatured_type
*sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6834 struct signatured_type
);
6836 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
6837 sig_type
->signature
= sig
;
6838 sig_type
->per_cu
.is_debug_types
= 1;
6839 if (dwarf2_per_objfile
->using_index
)
6841 sig_type
->per_cu
.v
.quick
=
6842 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6843 struct dwarf2_per_cu_quick_data
);
6848 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
6851 gdb_assert (*slot
== NULL
);
6853 /* The rest of sig_type must be filled in by the caller. */
6857 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
6858 Fill in SIG_ENTRY with DWO_ENTRY. */
6861 fill_in_sig_entry_from_dwo_entry (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6862 struct signatured_type
*sig_entry
,
6863 struct dwo_unit
*dwo_entry
)
6865 /* Make sure we're not clobbering something we don't expect to. */
6866 gdb_assert (! sig_entry
->per_cu
.queued
);
6867 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
6868 if (dwarf2_per_objfile
->using_index
)
6870 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
6871 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
6874 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
6875 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
6876 gdb_assert (to_underlying (sig_entry
->type_offset_in_section
) == 0);
6877 gdb_assert (sig_entry
->type_unit_group
== NULL
);
6878 gdb_assert (sig_entry
->dwo_unit
== NULL
);
6880 sig_entry
->per_cu
.section
= dwo_entry
->section
;
6881 sig_entry
->per_cu
.sect_off
= dwo_entry
->sect_off
;
6882 sig_entry
->per_cu
.length
= dwo_entry
->length
;
6883 sig_entry
->per_cu
.reading_dwo_directly
= 1;
6884 sig_entry
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6885 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
6886 sig_entry
->dwo_unit
= dwo_entry
;
6889 /* Subroutine of lookup_signatured_type.
6890 If we haven't read the TU yet, create the signatured_type data structure
6891 for a TU to be read in directly from a DWO file, bypassing the stub.
6892 This is the "Stay in DWO Optimization": When there is no DWP file and we're
6893 using .gdb_index, then when reading a CU we want to stay in the DWO file
6894 containing that CU. Otherwise we could end up reading several other DWO
6895 files (due to comdat folding) to process the transitive closure of all the
6896 mentioned TUs, and that can be slow. The current DWO file will have every
6897 type signature that it needs.
6898 We only do this for .gdb_index because in the psymtab case we already have
6899 to read all the DWOs to build the type unit groups. */
6901 static struct signatured_type
*
6902 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6904 struct dwarf2_per_objfile
*dwarf2_per_objfile
6905 = cu
->per_cu
->dwarf2_per_objfile
;
6906 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6907 struct dwo_file
*dwo_file
;
6908 struct dwo_unit find_dwo_entry
, *dwo_entry
;
6909 struct signatured_type find_sig_entry
, *sig_entry
;
6912 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
6914 /* If TU skeletons have been removed then we may not have read in any
6916 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6918 dwarf2_per_objfile
->signatured_types
6919 = allocate_signatured_type_table (objfile
);
6922 /* We only ever need to read in one copy of a signatured type.
6923 Use the global signatured_types array to do our own comdat-folding
6924 of types. If this is the first time we're reading this TU, and
6925 the TU has an entry in .gdb_index, replace the recorded data from
6926 .gdb_index with this TU. */
6928 find_sig_entry
.signature
= sig
;
6929 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
6930 &find_sig_entry
, INSERT
);
6931 sig_entry
= (struct signatured_type
*) *slot
;
6933 /* We can get here with the TU already read, *or* in the process of being
6934 read. Don't reassign the global entry to point to this DWO if that's
6935 the case. Also note that if the TU is already being read, it may not
6936 have come from a DWO, the program may be a mix of Fission-compiled
6937 code and non-Fission-compiled code. */
6939 /* Have we already tried to read this TU?
6940 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6941 needn't exist in the global table yet). */
6942 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
6945 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
6946 dwo_unit of the TU itself. */
6947 dwo_file
= cu
->dwo_unit
->dwo_file
;
6949 /* Ok, this is the first time we're reading this TU. */
6950 if (dwo_file
->tus
== NULL
)
6952 find_dwo_entry
.signature
= sig
;
6953 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_entry
);
6954 if (dwo_entry
== NULL
)
6957 /* If the global table doesn't have an entry for this TU, add one. */
6958 if (sig_entry
== NULL
)
6959 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
6961 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
6962 sig_entry
->per_cu
.tu_read
= 1;
6966 /* Subroutine of lookup_signatured_type.
6967 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
6968 then try the DWP file. If the TU stub (skeleton) has been removed then
6969 it won't be in .gdb_index. */
6971 static struct signatured_type
*
6972 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6974 struct dwarf2_per_objfile
*dwarf2_per_objfile
6975 = cu
->per_cu
->dwarf2_per_objfile
;
6976 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6977 struct dwp_file
*dwp_file
= get_dwp_file (dwarf2_per_objfile
);
6978 struct dwo_unit
*dwo_entry
;
6979 struct signatured_type find_sig_entry
, *sig_entry
;
6982 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
6983 gdb_assert (dwp_file
!= NULL
);
6985 /* If TU skeletons have been removed then we may not have read in any
6987 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6989 dwarf2_per_objfile
->signatured_types
6990 = allocate_signatured_type_table (objfile
);
6993 find_sig_entry
.signature
= sig
;
6994 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
6995 &find_sig_entry
, INSERT
);
6996 sig_entry
= (struct signatured_type
*) *slot
;
6998 /* Have we already tried to read this TU?
6999 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
7000 needn't exist in the global table yet). */
7001 if (sig_entry
!= NULL
)
7004 if (dwp_file
->tus
== NULL
)
7006 dwo_entry
= lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, NULL
,
7007 sig
, 1 /* is_debug_types */);
7008 if (dwo_entry
== NULL
)
7011 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
7012 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
7017 /* Lookup a signature based type for DW_FORM_ref_sig8.
7018 Returns NULL if signature SIG is not present in the table.
7019 It is up to the caller to complain about this. */
7021 static struct signatured_type
*
7022 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
7024 struct dwarf2_per_objfile
*dwarf2_per_objfile
7025 = cu
->per_cu
->dwarf2_per_objfile
;
7028 && dwarf2_per_objfile
->using_index
)
7030 /* We're in a DWO/DWP file, and we're using .gdb_index.
7031 These cases require special processing. */
7032 if (get_dwp_file (dwarf2_per_objfile
) == NULL
)
7033 return lookup_dwo_signatured_type (cu
, sig
);
7035 return lookup_dwp_signatured_type (cu
, sig
);
7039 struct signatured_type find_entry
, *entry
;
7041 if (dwarf2_per_objfile
->signatured_types
== NULL
)
7043 find_entry
.signature
= sig
;
7044 entry
= ((struct signatured_type
*)
7045 htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
));
7050 /* Low level DIE reading support. */
7052 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
7055 init_cu_die_reader (struct die_reader_specs
*reader
,
7056 struct dwarf2_cu
*cu
,
7057 struct dwarf2_section_info
*section
,
7058 struct dwo_file
*dwo_file
,
7059 struct abbrev_table
*abbrev_table
)
7061 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
7062 reader
->abfd
= get_section_bfd_owner (section
);
7064 reader
->dwo_file
= dwo_file
;
7065 reader
->die_section
= section
;
7066 reader
->buffer
= section
->buffer
;
7067 reader
->buffer_end
= section
->buffer
+ section
->size
;
7068 reader
->comp_dir
= NULL
;
7069 reader
->abbrev_table
= abbrev_table
;
7072 /* Subroutine of init_cutu_and_read_dies to simplify it.
7073 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
7074 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
7077 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
7078 from it to the DIE in the DWO. If NULL we are skipping the stub.
7079 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
7080 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
7081 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
7082 STUB_COMP_DIR may be non-NULL.
7083 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
7084 are filled in with the info of the DIE from the DWO file.
7085 *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated
7086 from the dwo. Since *RESULT_READER references this abbrev table, it must be
7087 kept around for at least as long as *RESULT_READER.
7089 The result is non-zero if a valid (non-dummy) DIE was found. */
7092 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
7093 struct dwo_unit
*dwo_unit
,
7094 struct die_info
*stub_comp_unit_die
,
7095 const char *stub_comp_dir
,
7096 struct die_reader_specs
*result_reader
,
7097 const gdb_byte
**result_info_ptr
,
7098 struct die_info
**result_comp_unit_die
,
7099 int *result_has_children
,
7100 abbrev_table_up
*result_dwo_abbrev_table
)
7102 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7103 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7104 struct dwarf2_cu
*cu
= this_cu
->cu
;
7106 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7107 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
7108 int i
,num_extra_attrs
;
7109 struct dwarf2_section_info
*dwo_abbrev_section
;
7110 struct attribute
*attr
;
7111 struct die_info
*comp_unit_die
;
7113 /* At most one of these may be provided. */
7114 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
7116 /* These attributes aren't processed until later:
7117 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
7118 DW_AT_comp_dir is used now, to find the DWO file, but it is also
7119 referenced later. However, these attributes are found in the stub
7120 which we won't have later. In order to not impose this complication
7121 on the rest of the code, we read them here and copy them to the
7130 if (stub_comp_unit_die
!= NULL
)
7132 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
7134 if (! this_cu
->is_debug_types
)
7135 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
7136 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
7137 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
7138 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
7139 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
7141 /* There should be a DW_AT_addr_base attribute here (if needed).
7142 We need the value before we can process DW_FORM_GNU_addr_index. */
7144 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
7146 cu
->addr_base
= DW_UNSND (attr
);
7148 /* There should be a DW_AT_ranges_base attribute here (if needed).
7149 We need the value before we can process DW_AT_ranges. */
7150 cu
->ranges_base
= 0;
7151 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
7153 cu
->ranges_base
= DW_UNSND (attr
);
7155 else if (stub_comp_dir
!= NULL
)
7157 /* Reconstruct the comp_dir attribute to simplify the code below. */
7158 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
7159 comp_dir
->name
= DW_AT_comp_dir
;
7160 comp_dir
->form
= DW_FORM_string
;
7161 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
7162 DW_STRING (comp_dir
) = stub_comp_dir
;
7165 /* Set up for reading the DWO CU/TU. */
7166 cu
->dwo_unit
= dwo_unit
;
7167 dwarf2_section_info
*section
= dwo_unit
->section
;
7168 dwarf2_read_section (objfile
, section
);
7169 abfd
= get_section_bfd_owner (section
);
7170 begin_info_ptr
= info_ptr
= (section
->buffer
7171 + to_underlying (dwo_unit
->sect_off
));
7172 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
7174 if (this_cu
->is_debug_types
)
7176 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
7178 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7179 &cu
->header
, section
,
7181 info_ptr
, rcuh_kind::TYPE
);
7182 /* This is not an assert because it can be caused by bad debug info. */
7183 if (sig_type
->signature
!= cu
->header
.signature
)
7185 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
7186 " TU at offset %s [in module %s]"),
7187 hex_string (sig_type
->signature
),
7188 hex_string (cu
->header
.signature
),
7189 sect_offset_str (dwo_unit
->sect_off
),
7190 bfd_get_filename (abfd
));
7192 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
7193 /* For DWOs coming from DWP files, we don't know the CU length
7194 nor the type's offset in the TU until now. */
7195 dwo_unit
->length
= get_cu_length (&cu
->header
);
7196 dwo_unit
->type_offset_in_tu
= cu
->header
.type_cu_offset_in_tu
;
7198 /* Establish the type offset that can be used to lookup the type.
7199 For DWO files, we don't know it until now. */
7200 sig_type
->type_offset_in_section
7201 = dwo_unit
->sect_off
+ to_underlying (dwo_unit
->type_offset_in_tu
);
7205 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7206 &cu
->header
, section
,
7208 info_ptr
, rcuh_kind::COMPILE
);
7209 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
7210 /* For DWOs coming from DWP files, we don't know the CU length
7212 dwo_unit
->length
= get_cu_length (&cu
->header
);
7215 *result_dwo_abbrev_table
7216 = abbrev_table_read_table (dwarf2_per_objfile
, dwo_abbrev_section
,
7217 cu
->header
.abbrev_sect_off
);
7218 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
,
7219 result_dwo_abbrev_table
->get ());
7221 /* Read in the die, but leave space to copy over the attributes
7222 from the stub. This has the benefit of simplifying the rest of
7223 the code - all the work to maintain the illusion of a single
7224 DW_TAG_{compile,type}_unit DIE is done here. */
7225 num_extra_attrs
= ((stmt_list
!= NULL
)
7229 + (comp_dir
!= NULL
));
7230 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
7231 result_has_children
, num_extra_attrs
);
7233 /* Copy over the attributes from the stub to the DIE we just read in. */
7234 comp_unit_die
= *result_comp_unit_die
;
7235 i
= comp_unit_die
->num_attrs
;
7236 if (stmt_list
!= NULL
)
7237 comp_unit_die
->attrs
[i
++] = *stmt_list
;
7239 comp_unit_die
->attrs
[i
++] = *low_pc
;
7240 if (high_pc
!= NULL
)
7241 comp_unit_die
->attrs
[i
++] = *high_pc
;
7243 comp_unit_die
->attrs
[i
++] = *ranges
;
7244 if (comp_dir
!= NULL
)
7245 comp_unit_die
->attrs
[i
++] = *comp_dir
;
7246 comp_unit_die
->num_attrs
+= num_extra_attrs
;
7248 if (dwarf_die_debug
)
7250 fprintf_unfiltered (gdb_stdlog
,
7251 "Read die from %s@0x%x of %s:\n",
7252 get_section_name (section
),
7253 (unsigned) (begin_info_ptr
- section
->buffer
),
7254 bfd_get_filename (abfd
));
7255 dump_die (comp_unit_die
, dwarf_die_debug
);
7258 /* Save the comp_dir attribute. If there is no DWP file then we'll read
7259 TUs by skipping the stub and going directly to the entry in the DWO file.
7260 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
7261 to get it via circuitous means. Blech. */
7262 if (comp_dir
!= NULL
)
7263 result_reader
->comp_dir
= DW_STRING (comp_dir
);
7265 /* Skip dummy compilation units. */
7266 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
7267 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7270 *result_info_ptr
= info_ptr
;
7274 /* Subroutine of init_cutu_and_read_dies to simplify it.
7275 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
7276 Returns NULL if the specified DWO unit cannot be found. */
7278 static struct dwo_unit
*
7279 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
7280 struct die_info
*comp_unit_die
)
7282 struct dwarf2_cu
*cu
= this_cu
->cu
;
7284 struct dwo_unit
*dwo_unit
;
7285 const char *comp_dir
, *dwo_name
;
7287 gdb_assert (cu
!= NULL
);
7289 /* Yeah, we look dwo_name up again, but it simplifies the code. */
7290 dwo_name
= dwarf2_string_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
7291 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7293 if (this_cu
->is_debug_types
)
7295 struct signatured_type
*sig_type
;
7297 /* Since this_cu is the first member of struct signatured_type,
7298 we can go from a pointer to one to a pointer to the other. */
7299 sig_type
= (struct signatured_type
*) this_cu
;
7300 signature
= sig_type
->signature
;
7301 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
7305 struct attribute
*attr
;
7307 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
7309 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
7311 dwo_name
, objfile_name (this_cu
->dwarf2_per_objfile
->objfile
));
7312 signature
= DW_UNSND (attr
);
7313 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
7320 /* Subroutine of init_cutu_and_read_dies to simplify it.
7321 See it for a description of the parameters.
7322 Read a TU directly from a DWO file, bypassing the stub. */
7325 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
7326 int use_existing_cu
, int keep
,
7327 die_reader_func_ftype
*die_reader_func
,
7330 std::unique_ptr
<dwarf2_cu
> new_cu
;
7331 struct signatured_type
*sig_type
;
7332 struct die_reader_specs reader
;
7333 const gdb_byte
*info_ptr
;
7334 struct die_info
*comp_unit_die
;
7336 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7338 /* Verify we can do the following downcast, and that we have the
7340 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
7341 sig_type
= (struct signatured_type
*) this_cu
;
7342 gdb_assert (sig_type
->dwo_unit
!= NULL
);
7344 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
7346 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
7347 /* There's no need to do the rereading_dwo_cu handling that
7348 init_cutu_and_read_dies does since we don't read the stub. */
7352 /* If !use_existing_cu, this_cu->cu must be NULL. */
7353 gdb_assert (this_cu
->cu
== NULL
);
7354 new_cu
.reset (new dwarf2_cu (this_cu
));
7357 /* A future optimization, if needed, would be to use an existing
7358 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
7359 could share abbrev tables. */
7361 /* The abbreviation table used by READER, this must live at least as long as
7363 abbrev_table_up dwo_abbrev_table
;
7365 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
7366 NULL
/* stub_comp_unit_die */,
7367 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
7369 &comp_unit_die
, &has_children
,
7370 &dwo_abbrev_table
) == 0)
7376 /* All the "real" work is done here. */
7377 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7379 /* This duplicates the code in init_cutu_and_read_dies,
7380 but the alternative is making the latter more complex.
7381 This function is only for the special case of using DWO files directly:
7382 no point in overly complicating the general case just to handle this. */
7383 if (new_cu
!= NULL
&& keep
)
7385 /* Link this CU into read_in_chain. */
7386 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7387 dwarf2_per_objfile
->read_in_chain
= this_cu
;
7388 /* The chain owns it now. */
7393 /* Initialize a CU (or TU) and read its DIEs.
7394 If the CU defers to a DWO file, read the DWO file as well.
7396 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
7397 Otherwise the table specified in the comp unit header is read in and used.
7398 This is an optimization for when we already have the abbrev table.
7400 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
7401 Otherwise, a new CU is allocated with xmalloc.
7403 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
7404 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
7406 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
7407 linker) then DIE_READER_FUNC will not get called. */
7410 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
7411 struct abbrev_table
*abbrev_table
,
7412 int use_existing_cu
, int keep
,
7413 die_reader_func_ftype
*die_reader_func
,
7416 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7417 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7418 struct dwarf2_section_info
*section
= this_cu
->section
;
7419 bfd
*abfd
= get_section_bfd_owner (section
);
7420 struct dwarf2_cu
*cu
;
7421 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7422 struct die_reader_specs reader
;
7423 struct die_info
*comp_unit_die
;
7425 struct attribute
*attr
;
7426 struct signatured_type
*sig_type
= NULL
;
7427 struct dwarf2_section_info
*abbrev_section
;
7428 /* Non-zero if CU currently points to a DWO file and we need to
7429 reread it. When this happens we need to reread the skeleton die
7430 before we can reread the DWO file (this only applies to CUs, not TUs). */
7431 int rereading_dwo_cu
= 0;
7433 if (dwarf_die_debug
)
7434 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7435 this_cu
->is_debug_types
? "type" : "comp",
7436 sect_offset_str (this_cu
->sect_off
));
7438 if (use_existing_cu
)
7441 /* If we're reading a TU directly from a DWO file, including a virtual DWO
7442 file (instead of going through the stub), short-circuit all of this. */
7443 if (this_cu
->reading_dwo_directly
)
7445 /* Narrow down the scope of possibilities to have to understand. */
7446 gdb_assert (this_cu
->is_debug_types
);
7447 gdb_assert (abbrev_table
== NULL
);
7448 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
, keep
,
7449 die_reader_func
, data
);
7453 /* This is cheap if the section is already read in. */
7454 dwarf2_read_section (objfile
, section
);
7456 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7458 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
7460 std::unique_ptr
<dwarf2_cu
> new_cu
;
7461 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
7464 /* If this CU is from a DWO file we need to start over, we need to
7465 refetch the attributes from the skeleton CU.
7466 This could be optimized by retrieving those attributes from when we
7467 were here the first time: the previous comp_unit_die was stored in
7468 comp_unit_obstack. But there's no data yet that we need this
7470 if (cu
->dwo_unit
!= NULL
)
7471 rereading_dwo_cu
= 1;
7475 /* If !use_existing_cu, this_cu->cu must be NULL. */
7476 gdb_assert (this_cu
->cu
== NULL
);
7477 new_cu
.reset (new dwarf2_cu (this_cu
));
7481 /* Get the header. */
7482 if (to_underlying (cu
->header
.first_die_cu_offset
) != 0 && !rereading_dwo_cu
)
7484 /* We already have the header, there's no need to read it in again. */
7485 info_ptr
+= to_underlying (cu
->header
.first_die_cu_offset
);
7489 if (this_cu
->is_debug_types
)
7491 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7492 &cu
->header
, section
,
7493 abbrev_section
, info_ptr
,
7496 /* Since per_cu is the first member of struct signatured_type,
7497 we can go from a pointer to one to a pointer to the other. */
7498 sig_type
= (struct signatured_type
*) this_cu
;
7499 gdb_assert (sig_type
->signature
== cu
->header
.signature
);
7500 gdb_assert (sig_type
->type_offset_in_tu
7501 == cu
->header
.type_cu_offset_in_tu
);
7502 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7504 /* LENGTH has not been set yet for type units if we're
7505 using .gdb_index. */
7506 this_cu
->length
= get_cu_length (&cu
->header
);
7508 /* Establish the type offset that can be used to lookup the type. */
7509 sig_type
->type_offset_in_section
=
7510 this_cu
->sect_off
+ to_underlying (sig_type
->type_offset_in_tu
);
7512 this_cu
->dwarf_version
= cu
->header
.version
;
7516 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7517 &cu
->header
, section
,
7520 rcuh_kind::COMPILE
);
7522 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7523 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
7524 this_cu
->dwarf_version
= cu
->header
.version
;
7528 /* Skip dummy compilation units. */
7529 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7530 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7533 /* If we don't have them yet, read the abbrevs for this compilation unit.
7534 And if we need to read them now, make sure they're freed when we're
7535 done (own the table through ABBREV_TABLE_HOLDER). */
7536 abbrev_table_up abbrev_table_holder
;
7537 if (abbrev_table
!= NULL
)
7538 gdb_assert (cu
->header
.abbrev_sect_off
== abbrev_table
->sect_off
);
7542 = abbrev_table_read_table (dwarf2_per_objfile
, abbrev_section
,
7543 cu
->header
.abbrev_sect_off
);
7544 abbrev_table
= abbrev_table_holder
.get ();
7547 /* Read the top level CU/TU die. */
7548 init_cu_die_reader (&reader
, cu
, section
, NULL
, abbrev_table
);
7549 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
7551 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
7552 from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation
7553 table from the DWO file and pass the ownership over to us. It will be
7554 referenced from READER, so we must make sure to free it after we're done
7557 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
7558 DWO CU, that this test will fail (the attribute will not be present). */
7559 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
7560 abbrev_table_up dwo_abbrev_table
;
7563 struct dwo_unit
*dwo_unit
;
7564 struct die_info
*dwo_comp_unit_die
;
7568 complaint (&symfile_complaints
,
7569 _("compilation unit with DW_AT_GNU_dwo_name"
7570 " has children (offset %s) [in module %s]"),
7571 sect_offset_str (this_cu
->sect_off
),
7572 bfd_get_filename (abfd
));
7574 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
);
7575 if (dwo_unit
!= NULL
)
7577 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
7578 comp_unit_die
, NULL
,
7580 &dwo_comp_unit_die
, &has_children
,
7581 &dwo_abbrev_table
) == 0)
7586 comp_unit_die
= dwo_comp_unit_die
;
7590 /* Yikes, we couldn't find the rest of the DIE, we only have
7591 the stub. A complaint has already been logged. There's
7592 not much more we can do except pass on the stub DIE to
7593 die_reader_func. We don't want to throw an error on bad
7598 /* All of the above is setup for this call. Yikes. */
7599 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7601 /* Done, clean up. */
7602 if (new_cu
!= NULL
&& keep
)
7604 /* Link this CU into read_in_chain. */
7605 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7606 dwarf2_per_objfile
->read_in_chain
= this_cu
;
7607 /* The chain owns it now. */
7612 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present.
7613 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed
7614 to have already done the lookup to find the DWO file).
7616 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
7617 THIS_CU->is_debug_types, but nothing else.
7619 We fill in THIS_CU->length.
7621 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
7622 linker) then DIE_READER_FUNC will not get called.
7624 THIS_CU->cu is always freed when done.
7625 This is done in order to not leave THIS_CU->cu in a state where we have
7626 to care whether it refers to the "main" CU or the DWO CU. */
7629 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
7630 struct dwo_file
*dwo_file
,
7631 die_reader_func_ftype
*die_reader_func
,
7634 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7635 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7636 struct dwarf2_section_info
*section
= this_cu
->section
;
7637 bfd
*abfd
= get_section_bfd_owner (section
);
7638 struct dwarf2_section_info
*abbrev_section
;
7639 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7640 struct die_reader_specs reader
;
7641 struct die_info
*comp_unit_die
;
7644 if (dwarf_die_debug
)
7645 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7646 this_cu
->is_debug_types
? "type" : "comp",
7647 sect_offset_str (this_cu
->sect_off
));
7649 gdb_assert (this_cu
->cu
== NULL
);
7651 abbrev_section
= (dwo_file
!= NULL
7652 ? &dwo_file
->sections
.abbrev
7653 : get_abbrev_section_for_cu (this_cu
));
7655 /* This is cheap if the section is already read in. */
7656 dwarf2_read_section (objfile
, section
);
7658 struct dwarf2_cu
cu (this_cu
);
7660 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7661 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7662 &cu
.header
, section
,
7663 abbrev_section
, info_ptr
,
7664 (this_cu
->is_debug_types
7666 : rcuh_kind::COMPILE
));
7668 this_cu
->length
= get_cu_length (&cu
.header
);
7670 /* Skip dummy compilation units. */
7671 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7672 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7675 abbrev_table_up abbrev_table
7676 = abbrev_table_read_table (dwarf2_per_objfile
, abbrev_section
,
7677 cu
.header
.abbrev_sect_off
);
7679 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
, abbrev_table
.get ());
7680 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
7682 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7685 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
7686 does not lookup the specified DWO file.
7687 This cannot be used to read DWO files.
7689 THIS_CU->cu is always freed when done.
7690 This is done in order to not leave THIS_CU->cu in a state where we have
7691 to care whether it refers to the "main" CU or the DWO CU.
7692 We can revisit this if the data shows there's a performance issue. */
7695 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
7696 die_reader_func_ftype
*die_reader_func
,
7699 init_cutu_and_read_dies_no_follow (this_cu
, NULL
, die_reader_func
, data
);
7702 /* Type Unit Groups.
7704 Type Unit Groups are a way to collapse the set of all TUs (type units) into
7705 a more manageable set. The grouping is done by DW_AT_stmt_list entry
7706 so that all types coming from the same compilation (.o file) are grouped
7707 together. A future step could be to put the types in the same symtab as
7708 the CU the types ultimately came from. */
7711 hash_type_unit_group (const void *item
)
7713 const struct type_unit_group
*tu_group
7714 = (const struct type_unit_group
*) item
;
7716 return hash_stmt_list_entry (&tu_group
->hash
);
7720 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
7722 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
7723 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
7725 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
7728 /* Allocate a hash table for type unit groups. */
7731 allocate_type_unit_groups_table (struct objfile
*objfile
)
7733 return htab_create_alloc_ex (3,
7734 hash_type_unit_group
,
7737 &objfile
->objfile_obstack
,
7738 hashtab_obstack_allocate
,
7739 dummy_obstack_deallocate
);
7742 /* Type units that don't have DW_AT_stmt_list are grouped into their own
7743 partial symtabs. We combine several TUs per psymtab to not let the size
7744 of any one psymtab grow too big. */
7745 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
7746 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
7748 /* Helper routine for get_type_unit_group.
7749 Create the type_unit_group object used to hold one or more TUs. */
7751 static struct type_unit_group
*
7752 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
7754 struct dwarf2_per_objfile
*dwarf2_per_objfile
7755 = cu
->per_cu
->dwarf2_per_objfile
;
7756 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7757 struct dwarf2_per_cu_data
*per_cu
;
7758 struct type_unit_group
*tu_group
;
7760 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7761 struct type_unit_group
);
7762 per_cu
= &tu_group
->per_cu
;
7763 per_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
7765 if (dwarf2_per_objfile
->using_index
)
7767 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7768 struct dwarf2_per_cu_quick_data
);
7772 unsigned int line_offset
= to_underlying (line_offset_struct
);
7773 struct partial_symtab
*pst
;
7776 /* Give the symtab a useful name for debug purposes. */
7777 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
7778 name
= xstrprintf ("<type_units_%d>",
7779 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
7781 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
7783 pst
= create_partial_symtab (per_cu
, name
);
7789 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
7790 tu_group
->hash
.line_sect_off
= line_offset_struct
;
7795 /* Look up the type_unit_group for type unit CU, and create it if necessary.
7796 STMT_LIST is a DW_AT_stmt_list attribute. */
7798 static struct type_unit_group
*
7799 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
7801 struct dwarf2_per_objfile
*dwarf2_per_objfile
7802 = cu
->per_cu
->dwarf2_per_objfile
;
7803 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7804 struct type_unit_group
*tu_group
;
7806 unsigned int line_offset
;
7807 struct type_unit_group type_unit_group_for_lookup
;
7809 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
7811 dwarf2_per_objfile
->type_unit_groups
=
7812 allocate_type_unit_groups_table (dwarf2_per_objfile
->objfile
);
7815 /* Do we need to create a new group, or can we use an existing one? */
7819 line_offset
= DW_UNSND (stmt_list
);
7820 ++tu_stats
->nr_symtab_sharers
;
7824 /* Ugh, no stmt_list. Rare, but we have to handle it.
7825 We can do various things here like create one group per TU or
7826 spread them over multiple groups to split up the expansion work.
7827 To avoid worst case scenarios (too many groups or too large groups)
7828 we, umm, group them in bunches. */
7829 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
7830 | (tu_stats
->nr_stmt_less_type_units
7831 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
7832 ++tu_stats
->nr_stmt_less_type_units
;
7835 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
7836 type_unit_group_for_lookup
.hash
.line_sect_off
= (sect_offset
) line_offset
;
7837 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
7838 &type_unit_group_for_lookup
, INSERT
);
7841 tu_group
= (struct type_unit_group
*) *slot
;
7842 gdb_assert (tu_group
!= NULL
);
7846 sect_offset line_offset_struct
= (sect_offset
) line_offset
;
7847 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
7849 ++tu_stats
->nr_symtabs
;
7855 /* Partial symbol tables. */
7857 /* Create a psymtab named NAME and assign it to PER_CU.
7859 The caller must fill in the following details:
7860 dirname, textlow, texthigh. */
7862 static struct partial_symtab
*
7863 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
7865 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
7866 struct partial_symtab
*pst
;
7868 pst
= start_psymtab_common (objfile
, name
, 0,
7869 objfile
->global_psymbols
,
7870 objfile
->static_psymbols
);
7872 pst
->psymtabs_addrmap_supported
= 1;
7874 /* This is the glue that links PST into GDB's symbol API. */
7875 pst
->read_symtab_private
= per_cu
;
7876 pst
->read_symtab
= dwarf2_read_symtab
;
7877 per_cu
->v
.psymtab
= pst
;
7882 /* The DATA object passed to process_psymtab_comp_unit_reader has this
7885 struct process_psymtab_comp_unit_data
7887 /* True if we are reading a DW_TAG_partial_unit. */
7889 int want_partial_unit
;
7891 /* The "pretend" language that is used if the CU doesn't declare a
7894 enum language pretend_language
;
7897 /* die_reader_func for process_psymtab_comp_unit. */
7900 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
7901 const gdb_byte
*info_ptr
,
7902 struct die_info
*comp_unit_die
,
7906 struct dwarf2_cu
*cu
= reader
->cu
;
7907 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
7908 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7909 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7911 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
7912 struct partial_symtab
*pst
;
7913 enum pc_bounds_kind cu_bounds_kind
;
7914 const char *filename
;
7915 struct process_psymtab_comp_unit_data
*info
7916 = (struct process_psymtab_comp_unit_data
*) data
;
7918 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !info
->want_partial_unit
)
7921 gdb_assert (! per_cu
->is_debug_types
);
7923 prepare_one_comp_unit (cu
, comp_unit_die
, info
->pretend_language
);
7925 cu
->list_in_scope
= &file_symbols
;
7927 /* Allocate a new partial symbol table structure. */
7928 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
7929 if (filename
== NULL
)
7932 pst
= create_partial_symtab (per_cu
, filename
);
7934 /* This must be done before calling dwarf2_build_include_psymtabs. */
7935 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7937 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7939 dwarf2_find_base_address (comp_unit_die
, cu
);
7941 /* Possibly set the default values of LOWPC and HIGHPC from
7943 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
7944 &best_highpc
, cu
, pst
);
7945 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
7946 /* Store the contiguous range if it is not empty; it can be empty for
7947 CUs with no code. */
7948 addrmap_set_empty (objfile
->psymtabs_addrmap
,
7949 gdbarch_adjust_dwarf2_addr (gdbarch
,
7950 best_lowpc
+ baseaddr
),
7951 gdbarch_adjust_dwarf2_addr (gdbarch
,
7952 best_highpc
+ baseaddr
) - 1,
7955 /* Check if comp unit has_children.
7956 If so, read the rest of the partial symbols from this comp unit.
7957 If not, there's no more debug_info for this comp unit. */
7960 struct partial_die_info
*first_die
;
7961 CORE_ADDR lowpc
, highpc
;
7963 lowpc
= ((CORE_ADDR
) -1);
7964 highpc
= ((CORE_ADDR
) 0);
7966 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7968 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
7969 cu_bounds_kind
<= PC_BOUNDS_INVALID
, cu
);
7971 /* If we didn't find a lowpc, set it to highpc to avoid
7972 complaints from `maint check'. */
7973 if (lowpc
== ((CORE_ADDR
) -1))
7976 /* If the compilation unit didn't have an explicit address range,
7977 then use the information extracted from its child dies. */
7978 if (cu_bounds_kind
<= PC_BOUNDS_INVALID
)
7981 best_highpc
= highpc
;
7984 pst
->textlow
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
);
7985 pst
->texthigh
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
);
7987 end_psymtab_common (objfile
, pst
);
7989 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
7992 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
7993 struct dwarf2_per_cu_data
*iter
;
7995 /* Fill in 'dependencies' here; we fill in 'users' in a
7997 pst
->number_of_dependencies
= len
;
7999 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
8001 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
8004 pst
->dependencies
[i
] = iter
->v
.psymtab
;
8006 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
8009 /* Get the list of files included in the current compilation unit,
8010 and build a psymtab for each of them. */
8011 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
8013 if (dwarf_read_debug
)
8015 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8017 fprintf_unfiltered (gdb_stdlog
,
8018 "Psymtab for %s unit @%s: %s - %s"
8019 ", %d global, %d static syms\n",
8020 per_cu
->is_debug_types
? "type" : "comp",
8021 sect_offset_str (per_cu
->sect_off
),
8022 paddress (gdbarch
, pst
->textlow
),
8023 paddress (gdbarch
, pst
->texthigh
),
8024 pst
->n_global_syms
, pst
->n_static_syms
);
8028 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
8029 Process compilation unit THIS_CU for a psymtab. */
8032 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
8033 int want_partial_unit
,
8034 enum language pretend_language
)
8036 /* If this compilation unit was already read in, free the
8037 cached copy in order to read it in again. This is
8038 necessary because we skipped some symbols when we first
8039 read in the compilation unit (see load_partial_dies).
8040 This problem could be avoided, but the benefit is unclear. */
8041 if (this_cu
->cu
!= NULL
)
8042 free_one_cached_comp_unit (this_cu
);
8044 if (this_cu
->is_debug_types
)
8045 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0, build_type_psymtabs_reader
,
8049 process_psymtab_comp_unit_data info
;
8050 info
.want_partial_unit
= want_partial_unit
;
8051 info
.pretend_language
= pretend_language
;
8052 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0,
8053 process_psymtab_comp_unit_reader
, &info
);
8056 /* Age out any secondary CUs. */
8057 age_cached_comp_units (this_cu
->dwarf2_per_objfile
);
8060 /* Reader function for build_type_psymtabs. */
8063 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
8064 const gdb_byte
*info_ptr
,
8065 struct die_info
*type_unit_die
,
8069 struct dwarf2_per_objfile
*dwarf2_per_objfile
8070 = reader
->cu
->per_cu
->dwarf2_per_objfile
;
8071 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8072 struct dwarf2_cu
*cu
= reader
->cu
;
8073 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
8074 struct signatured_type
*sig_type
;
8075 struct type_unit_group
*tu_group
;
8076 struct attribute
*attr
;
8077 struct partial_die_info
*first_die
;
8078 CORE_ADDR lowpc
, highpc
;
8079 struct partial_symtab
*pst
;
8081 gdb_assert (data
== NULL
);
8082 gdb_assert (per_cu
->is_debug_types
);
8083 sig_type
= (struct signatured_type
*) per_cu
;
8088 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
8089 tu_group
= get_type_unit_group (cu
, attr
);
8091 VEC_safe_push (sig_type_ptr
, tu_group
->tus
, sig_type
);
8093 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
8094 cu
->list_in_scope
= &file_symbols
;
8095 pst
= create_partial_symtab (per_cu
, "");
8098 first_die
= load_partial_dies (reader
, info_ptr
, 1);
8100 lowpc
= (CORE_ADDR
) -1;
8101 highpc
= (CORE_ADDR
) 0;
8102 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
8104 end_psymtab_common (objfile
, pst
);
8107 /* Struct used to sort TUs by their abbreviation table offset. */
8109 struct tu_abbrev_offset
8111 tu_abbrev_offset (signatured_type
*sig_type_
, sect_offset abbrev_offset_
)
8112 : sig_type (sig_type_
), abbrev_offset (abbrev_offset_
)
8115 signatured_type
*sig_type
;
8116 sect_offset abbrev_offset
;
8119 /* Helper routine for build_type_psymtabs_1, passed to std::sort. */
8122 sort_tu_by_abbrev_offset (const struct tu_abbrev_offset
&a
,
8123 const struct tu_abbrev_offset
&b
)
8125 return a
.abbrev_offset
< b
.abbrev_offset
;
8128 /* Efficiently read all the type units.
8129 This does the bulk of the work for build_type_psymtabs.
8131 The efficiency is because we sort TUs by the abbrev table they use and
8132 only read each abbrev table once. In one program there are 200K TUs
8133 sharing 8K abbrev tables.
8135 The main purpose of this function is to support building the
8136 dwarf2_per_objfile->type_unit_groups table.
8137 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
8138 can collapse the search space by grouping them by stmt_list.
8139 The savings can be significant, in the same program from above the 200K TUs
8140 share 8K stmt_list tables.
8142 FUNC is expected to call get_type_unit_group, which will create the
8143 struct type_unit_group if necessary and add it to
8144 dwarf2_per_objfile->type_unit_groups. */
8147 build_type_psymtabs_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8149 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
8150 abbrev_table_up abbrev_table
;
8151 sect_offset abbrev_offset
;
8153 /* It's up to the caller to not call us multiple times. */
8154 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
8156 if (dwarf2_per_objfile
->all_type_units
.empty ())
8159 /* TUs typically share abbrev tables, and there can be way more TUs than
8160 abbrev tables. Sort by abbrev table to reduce the number of times we
8161 read each abbrev table in.
8162 Alternatives are to punt or to maintain a cache of abbrev tables.
8163 This is simpler and efficient enough for now.
8165 Later we group TUs by their DW_AT_stmt_list value (as this defines the
8166 symtab to use). Typically TUs with the same abbrev offset have the same
8167 stmt_list value too so in practice this should work well.
8169 The basic algorithm here is:
8171 sort TUs by abbrev table
8172 for each TU with same abbrev table:
8173 read abbrev table if first user
8174 read TU top level DIE
8175 [IWBN if DWO skeletons had DW_AT_stmt_list]
8178 if (dwarf_read_debug
)
8179 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
8181 /* Sort in a separate table to maintain the order of all_type_units
8182 for .gdb_index: TU indices directly index all_type_units. */
8183 std::vector
<tu_abbrev_offset
> sorted_by_abbrev
;
8184 sorted_by_abbrev
.reserve (dwarf2_per_objfile
->all_type_units
.size ());
8186 for (signatured_type
*sig_type
: dwarf2_per_objfile
->all_type_units
)
8187 sorted_by_abbrev
.emplace_back
8188 (sig_type
, read_abbrev_offset (dwarf2_per_objfile
,
8189 sig_type
->per_cu
.section
,
8190 sig_type
->per_cu
.sect_off
));
8192 std::sort (sorted_by_abbrev
.begin (), sorted_by_abbrev
.end (),
8193 sort_tu_by_abbrev_offset
);
8195 abbrev_offset
= (sect_offset
) ~(unsigned) 0;
8197 for (const tu_abbrev_offset
&tu
: sorted_by_abbrev
)
8199 /* Switch to the next abbrev table if necessary. */
8200 if (abbrev_table
== NULL
8201 || tu
.abbrev_offset
!= abbrev_offset
)
8203 abbrev_offset
= tu
.abbrev_offset
;
8205 abbrev_table_read_table (dwarf2_per_objfile
,
8206 &dwarf2_per_objfile
->abbrev
,
8208 ++tu_stats
->nr_uniq_abbrev_tables
;
8211 init_cutu_and_read_dies (&tu
.sig_type
->per_cu
, abbrev_table
.get (),
8212 0, 0, build_type_psymtabs_reader
, NULL
);
8216 /* Print collected type unit statistics. */
8219 print_tu_stats (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8221 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
8223 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
8224 fprintf_unfiltered (gdb_stdlog
, " %zu TUs\n",
8225 dwarf2_per_objfile
->all_type_units
.size ());
8226 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
8227 tu_stats
->nr_uniq_abbrev_tables
);
8228 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
8229 tu_stats
->nr_symtabs
);
8230 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
8231 tu_stats
->nr_symtab_sharers
);
8232 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
8233 tu_stats
->nr_stmt_less_type_units
);
8234 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
8235 tu_stats
->nr_all_type_units_reallocs
);
8238 /* Traversal function for build_type_psymtabs. */
8241 build_type_psymtab_dependencies (void **slot
, void *info
)
8243 struct dwarf2_per_objfile
*dwarf2_per_objfile
8244 = (struct dwarf2_per_objfile
*) info
;
8245 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8246 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
8247 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
8248 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8249 int len
= VEC_length (sig_type_ptr
, tu_group
->tus
);
8250 struct signatured_type
*iter
;
8253 gdb_assert (len
> 0);
8254 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
8256 pst
->number_of_dependencies
= len
;
8258 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
8260 VEC_iterate (sig_type_ptr
, tu_group
->tus
, i
, iter
);
8263 gdb_assert (iter
->per_cu
.is_debug_types
);
8264 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
8265 iter
->type_unit_group
= tu_group
;
8268 VEC_free (sig_type_ptr
, tu_group
->tus
);
8273 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
8274 Build partial symbol tables for the .debug_types comp-units. */
8277 build_type_psymtabs (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8279 if (! create_all_type_units (dwarf2_per_objfile
))
8282 build_type_psymtabs_1 (dwarf2_per_objfile
);
8285 /* Traversal function for process_skeletonless_type_unit.
8286 Read a TU in a DWO file and build partial symbols for it. */
8289 process_skeletonless_type_unit (void **slot
, void *info
)
8291 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
8292 struct dwarf2_per_objfile
*dwarf2_per_objfile
8293 = (struct dwarf2_per_objfile
*) info
;
8294 struct signatured_type find_entry
, *entry
;
8296 /* If this TU doesn't exist in the global table, add it and read it in. */
8298 if (dwarf2_per_objfile
->signatured_types
== NULL
)
8300 dwarf2_per_objfile
->signatured_types
8301 = allocate_signatured_type_table (dwarf2_per_objfile
->objfile
);
8304 find_entry
.signature
= dwo_unit
->signature
;
8305 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
, &find_entry
,
8307 /* If we've already seen this type there's nothing to do. What's happening
8308 is we're doing our own version of comdat-folding here. */
8312 /* This does the job that create_all_type_units would have done for
8314 entry
= add_type_unit (dwarf2_per_objfile
, dwo_unit
->signature
, slot
);
8315 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, entry
, dwo_unit
);
8318 /* This does the job that build_type_psymtabs_1 would have done. */
8319 init_cutu_and_read_dies (&entry
->per_cu
, NULL
, 0, 0,
8320 build_type_psymtabs_reader
, NULL
);
8325 /* Traversal function for process_skeletonless_type_units. */
8328 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
8330 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
8332 if (dwo_file
->tus
!= NULL
)
8334 htab_traverse_noresize (dwo_file
->tus
,
8335 process_skeletonless_type_unit
, info
);
8341 /* Scan all TUs of DWO files, verifying we've processed them.
8342 This is needed in case a TU was emitted without its skeleton.
8343 Note: This can't be done until we know what all the DWO files are. */
8346 process_skeletonless_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8348 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
8349 if (get_dwp_file (dwarf2_per_objfile
) == NULL
8350 && dwarf2_per_objfile
->dwo_files
!= NULL
)
8352 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
,
8353 process_dwo_file_for_skeletonless_type_units
,
8354 dwarf2_per_objfile
);
8358 /* Compute the 'user' field for each psymtab in DWARF2_PER_OBJFILE. */
8361 set_partial_user (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8363 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
8365 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8370 for (int j
= 0; j
< pst
->number_of_dependencies
; ++j
)
8372 /* Set the 'user' field only if it is not already set. */
8373 if (pst
->dependencies
[j
]->user
== NULL
)
8374 pst
->dependencies
[j
]->user
= pst
;
8379 /* Build the partial symbol table by doing a quick pass through the
8380 .debug_info and .debug_abbrev sections. */
8383 dwarf2_build_psymtabs_hard (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8385 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8387 if (dwarf_read_debug
)
8389 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
8390 objfile_name (objfile
));
8393 dwarf2_per_objfile
->reading_partial_symbols
= 1;
8395 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
8397 /* Any cached compilation units will be linked by the per-objfile
8398 read_in_chain. Make sure to free them when we're done. */
8399 free_cached_comp_units
freer (dwarf2_per_objfile
);
8401 build_type_psymtabs (dwarf2_per_objfile
);
8403 create_all_comp_units (dwarf2_per_objfile
);
8405 /* Create a temporary address map on a temporary obstack. We later
8406 copy this to the final obstack. */
8407 auto_obstack temp_obstack
;
8409 scoped_restore save_psymtabs_addrmap
8410 = make_scoped_restore (&objfile
->psymtabs_addrmap
,
8411 addrmap_create_mutable (&temp_obstack
));
8413 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
8414 process_psymtab_comp_unit (per_cu
, 0, language_minimal
);
8416 /* This has to wait until we read the CUs, we need the list of DWOs. */
8417 process_skeletonless_type_units (dwarf2_per_objfile
);
8419 /* Now that all TUs have been processed we can fill in the dependencies. */
8420 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
8422 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
8423 build_type_psymtab_dependencies
, dwarf2_per_objfile
);
8426 if (dwarf_read_debug
)
8427 print_tu_stats (dwarf2_per_objfile
);
8429 set_partial_user (dwarf2_per_objfile
);
8431 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
8432 &objfile
->objfile_obstack
);
8433 /* At this point we want to keep the address map. */
8434 save_psymtabs_addrmap
.release ();
8436 if (dwarf_read_debug
)
8437 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
8438 objfile_name (objfile
));
8441 /* die_reader_func for load_partial_comp_unit. */
8444 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
8445 const gdb_byte
*info_ptr
,
8446 struct die_info
*comp_unit_die
,
8450 struct dwarf2_cu
*cu
= reader
->cu
;
8452 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
8454 /* Check if comp unit has_children.
8455 If so, read the rest of the partial symbols from this comp unit.
8456 If not, there's no more debug_info for this comp unit. */
8458 load_partial_dies (reader
, info_ptr
, 0);
8461 /* Load the partial DIEs for a secondary CU into memory.
8462 This is also used when rereading a primary CU with load_all_dies. */
8465 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
8467 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
8468 load_partial_comp_unit_reader
, NULL
);
8472 read_comp_units_from_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
8473 struct dwarf2_section_info
*section
,
8474 struct dwarf2_section_info
*abbrev_section
,
8475 unsigned int is_dwz
)
8477 const gdb_byte
*info_ptr
;
8478 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8480 if (dwarf_read_debug
)
8481 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
8482 get_section_name (section
),
8483 get_section_file_name (section
));
8485 dwarf2_read_section (objfile
, section
);
8487 info_ptr
= section
->buffer
;
8489 while (info_ptr
< section
->buffer
+ section
->size
)
8491 struct dwarf2_per_cu_data
*this_cu
;
8493 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
->buffer
);
8495 comp_unit_head cu_header
;
8496 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
8497 abbrev_section
, info_ptr
,
8498 rcuh_kind::COMPILE
);
8500 /* Save the compilation unit for later lookup. */
8501 if (cu_header
.unit_type
!= DW_UT_type
)
8503 this_cu
= XOBNEW (&objfile
->objfile_obstack
,
8504 struct dwarf2_per_cu_data
);
8505 memset (this_cu
, 0, sizeof (*this_cu
));
8509 auto sig_type
= XOBNEW (&objfile
->objfile_obstack
,
8510 struct signatured_type
);
8511 memset (sig_type
, 0, sizeof (*sig_type
));
8512 sig_type
->signature
= cu_header
.signature
;
8513 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
8514 this_cu
= &sig_type
->per_cu
;
8516 this_cu
->is_debug_types
= (cu_header
.unit_type
== DW_UT_type
);
8517 this_cu
->sect_off
= sect_off
;
8518 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
8519 this_cu
->is_dwz
= is_dwz
;
8520 this_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
8521 this_cu
->section
= section
;
8523 dwarf2_per_objfile
->all_comp_units
.push_back (this_cu
);
8525 info_ptr
= info_ptr
+ this_cu
->length
;
8529 /* Create a list of all compilation units in OBJFILE.
8530 This is only done for -readnow and building partial symtabs. */
8533 create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8535 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
8536 read_comp_units_from_section (dwarf2_per_objfile
, &dwarf2_per_objfile
->info
,
8537 &dwarf2_per_objfile
->abbrev
, 0);
8539 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
8541 read_comp_units_from_section (dwarf2_per_objfile
, &dwz
->info
, &dwz
->abbrev
,
8545 /* Process all loaded DIEs for compilation unit CU, starting at
8546 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
8547 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
8548 DW_AT_ranges). See the comments of add_partial_subprogram on how
8549 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
8552 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
8553 CORE_ADDR
*highpc
, int set_addrmap
,
8554 struct dwarf2_cu
*cu
)
8556 struct partial_die_info
*pdi
;
8558 /* Now, march along the PDI's, descending into ones which have
8559 interesting children but skipping the children of the other ones,
8560 until we reach the end of the compilation unit. */
8568 /* Anonymous namespaces or modules have no name but have interesting
8569 children, so we need to look at them. Ditto for anonymous
8572 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
8573 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
8574 || pdi
->tag
== DW_TAG_imported_unit
8575 || pdi
->tag
== DW_TAG_inlined_subroutine
)
8579 case DW_TAG_subprogram
:
8580 case DW_TAG_inlined_subroutine
:
8581 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8583 case DW_TAG_constant
:
8584 case DW_TAG_variable
:
8585 case DW_TAG_typedef
:
8586 case DW_TAG_union_type
:
8587 if (!pdi
->is_declaration
)
8589 add_partial_symbol (pdi
, cu
);
8592 case DW_TAG_class_type
:
8593 case DW_TAG_interface_type
:
8594 case DW_TAG_structure_type
:
8595 if (!pdi
->is_declaration
)
8597 add_partial_symbol (pdi
, cu
);
8599 if ((cu
->language
== language_rust
8600 || cu
->language
== language_cplus
) && pdi
->has_children
)
8601 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
8604 case DW_TAG_enumeration_type
:
8605 if (!pdi
->is_declaration
)
8606 add_partial_enumeration (pdi
, cu
);
8608 case DW_TAG_base_type
:
8609 case DW_TAG_subrange_type
:
8610 /* File scope base type definitions are added to the partial
8612 add_partial_symbol (pdi
, cu
);
8614 case DW_TAG_namespace
:
8615 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8618 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8620 case DW_TAG_imported_unit
:
8622 struct dwarf2_per_cu_data
*per_cu
;
8624 /* For now we don't handle imported units in type units. */
8625 if (cu
->per_cu
->is_debug_types
)
8627 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8628 " supported in type units [in module %s]"),
8629 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
8632 per_cu
= dwarf2_find_containing_comp_unit
8633 (pdi
->d
.sect_off
, pdi
->is_dwz
,
8634 cu
->per_cu
->dwarf2_per_objfile
);
8636 /* Go read the partial unit, if needed. */
8637 if (per_cu
->v
.psymtab
== NULL
)
8638 process_psymtab_comp_unit (per_cu
, 1, cu
->language
);
8640 VEC_safe_push (dwarf2_per_cu_ptr
,
8641 cu
->per_cu
->imported_symtabs
, per_cu
);
8644 case DW_TAG_imported_declaration
:
8645 add_partial_symbol (pdi
, cu
);
8652 /* If the die has a sibling, skip to the sibling. */
8654 pdi
= pdi
->die_sibling
;
8658 /* Functions used to compute the fully scoped name of a partial DIE.
8660 Normally, this is simple. For C++, the parent DIE's fully scoped
8661 name is concatenated with "::" and the partial DIE's name.
8662 Enumerators are an exception; they use the scope of their parent
8663 enumeration type, i.e. the name of the enumeration type is not
8664 prepended to the enumerator.
8666 There are two complexities. One is DW_AT_specification; in this
8667 case "parent" means the parent of the target of the specification,
8668 instead of the direct parent of the DIE. The other is compilers
8669 which do not emit DW_TAG_namespace; in this case we try to guess
8670 the fully qualified name of structure types from their members'
8671 linkage names. This must be done using the DIE's children rather
8672 than the children of any DW_AT_specification target. We only need
8673 to do this for structures at the top level, i.e. if the target of
8674 any DW_AT_specification (if any; otherwise the DIE itself) does not
8677 /* Compute the scope prefix associated with PDI's parent, in
8678 compilation unit CU. The result will be allocated on CU's
8679 comp_unit_obstack, or a copy of the already allocated PDI->NAME
8680 field. NULL is returned if no prefix is necessary. */
8682 partial_die_parent_scope (struct partial_die_info
*pdi
,
8683 struct dwarf2_cu
*cu
)
8685 const char *grandparent_scope
;
8686 struct partial_die_info
*parent
, *real_pdi
;
8688 /* We need to look at our parent DIE; if we have a DW_AT_specification,
8689 then this means the parent of the specification DIE. */
8692 while (real_pdi
->has_specification
)
8693 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
8694 real_pdi
->spec_is_dwz
, cu
);
8696 parent
= real_pdi
->die_parent
;
8700 if (parent
->scope_set
)
8701 return parent
->scope
;
8705 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
8707 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
8708 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
8709 Work around this problem here. */
8710 if (cu
->language
== language_cplus
8711 && parent
->tag
== DW_TAG_namespace
8712 && strcmp (parent
->name
, "::") == 0
8713 && grandparent_scope
== NULL
)
8715 parent
->scope
= NULL
;
8716 parent
->scope_set
= 1;
8720 if (pdi
->tag
== DW_TAG_enumerator
)
8721 /* Enumerators should not get the name of the enumeration as a prefix. */
8722 parent
->scope
= grandparent_scope
;
8723 else if (parent
->tag
== DW_TAG_namespace
8724 || parent
->tag
== DW_TAG_module
8725 || parent
->tag
== DW_TAG_structure_type
8726 || parent
->tag
== DW_TAG_class_type
8727 || parent
->tag
== DW_TAG_interface_type
8728 || parent
->tag
== DW_TAG_union_type
8729 || parent
->tag
== DW_TAG_enumeration_type
)
8731 if (grandparent_scope
== NULL
)
8732 parent
->scope
= parent
->name
;
8734 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
8736 parent
->name
, 0, cu
);
8740 /* FIXME drow/2004-04-01: What should we be doing with
8741 function-local names? For partial symbols, we should probably be
8743 complaint (&symfile_complaints
,
8744 _("unhandled containing DIE tag %d for DIE at %s"),
8745 parent
->tag
, sect_offset_str (pdi
->sect_off
));
8746 parent
->scope
= grandparent_scope
;
8749 parent
->scope_set
= 1;
8750 return parent
->scope
;
8753 /* Return the fully scoped name associated with PDI, from compilation unit
8754 CU. The result will be allocated with malloc. */
8757 partial_die_full_name (struct partial_die_info
*pdi
,
8758 struct dwarf2_cu
*cu
)
8760 const char *parent_scope
;
8762 /* If this is a template instantiation, we can not work out the
8763 template arguments from partial DIEs. So, unfortunately, we have
8764 to go through the full DIEs. At least any work we do building
8765 types here will be reused if full symbols are loaded later. */
8766 if (pdi
->has_template_arguments
)
8770 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
8772 struct die_info
*die
;
8773 struct attribute attr
;
8774 struct dwarf2_cu
*ref_cu
= cu
;
8776 /* DW_FORM_ref_addr is using section offset. */
8777 attr
.name
= (enum dwarf_attribute
) 0;
8778 attr
.form
= DW_FORM_ref_addr
;
8779 attr
.u
.unsnd
= to_underlying (pdi
->sect_off
);
8780 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
8782 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
8786 parent_scope
= partial_die_parent_scope (pdi
, cu
);
8787 if (parent_scope
== NULL
)
8790 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
8794 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
8796 struct dwarf2_per_objfile
*dwarf2_per_objfile
8797 = cu
->per_cu
->dwarf2_per_objfile
;
8798 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8799 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8801 const char *actual_name
= NULL
;
8803 char *built_actual_name
;
8805 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8807 built_actual_name
= partial_die_full_name (pdi
, cu
);
8808 if (built_actual_name
!= NULL
)
8809 actual_name
= built_actual_name
;
8811 if (actual_name
== NULL
)
8812 actual_name
= pdi
->name
;
8816 case DW_TAG_inlined_subroutine
:
8817 case DW_TAG_subprogram
:
8818 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
);
8819 if (pdi
->is_external
|| cu
->language
== language_ada
)
8821 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
8822 of the global scope. But in Ada, we want to be able to access
8823 nested procedures globally. So all Ada subprograms are stored
8824 in the global scope. */
8825 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8826 built_actual_name
!= NULL
,
8827 VAR_DOMAIN
, LOC_BLOCK
,
8828 &objfile
->global_psymbols
,
8829 addr
, cu
->language
, objfile
);
8833 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8834 built_actual_name
!= NULL
,
8835 VAR_DOMAIN
, LOC_BLOCK
,
8836 &objfile
->static_psymbols
,
8837 addr
, cu
->language
, objfile
);
8840 if (pdi
->main_subprogram
&& actual_name
!= NULL
)
8841 set_objfile_main_name (objfile
, actual_name
, cu
->language
);
8843 case DW_TAG_constant
:
8845 std::vector
<partial_symbol
*> *list
;
8847 if (pdi
->is_external
)
8848 list
= &objfile
->global_psymbols
;
8850 list
= &objfile
->static_psymbols
;
8851 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8852 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
8853 list
, 0, cu
->language
, objfile
);
8856 case DW_TAG_variable
:
8858 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
8862 && !dwarf2_per_objfile
->has_section_at_zero
)
8864 /* A global or static variable may also have been stripped
8865 out by the linker if unused, in which case its address
8866 will be nullified; do not add such variables into partial
8867 symbol table then. */
8869 else if (pdi
->is_external
)
8872 Don't enter into the minimal symbol tables as there is
8873 a minimal symbol table entry from the ELF symbols already.
8874 Enter into partial symbol table if it has a location
8875 descriptor or a type.
8876 If the location descriptor is missing, new_symbol will create
8877 a LOC_UNRESOLVED symbol, the address of the variable will then
8878 be determined from the minimal symbol table whenever the variable
8880 The address for the partial symbol table entry is not
8881 used by GDB, but it comes in handy for debugging partial symbol
8884 if (pdi
->d
.locdesc
|| pdi
->has_type
)
8885 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8886 built_actual_name
!= NULL
,
8887 VAR_DOMAIN
, LOC_STATIC
,
8888 &objfile
->global_psymbols
,
8890 cu
->language
, objfile
);
8894 int has_loc
= pdi
->d
.locdesc
!= NULL
;
8896 /* Static Variable. Skip symbols whose value we cannot know (those
8897 without location descriptors or constant values). */
8898 if (!has_loc
&& !pdi
->has_const_value
)
8900 xfree (built_actual_name
);
8904 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8905 built_actual_name
!= NULL
,
8906 VAR_DOMAIN
, LOC_STATIC
,
8907 &objfile
->static_psymbols
,
8908 has_loc
? addr
+ baseaddr
: (CORE_ADDR
) 0,
8909 cu
->language
, objfile
);
8912 case DW_TAG_typedef
:
8913 case DW_TAG_base_type
:
8914 case DW_TAG_subrange_type
:
8915 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8916 built_actual_name
!= NULL
,
8917 VAR_DOMAIN
, LOC_TYPEDEF
,
8918 &objfile
->static_psymbols
,
8919 0, cu
->language
, objfile
);
8921 case DW_TAG_imported_declaration
:
8922 case DW_TAG_namespace
:
8923 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8924 built_actual_name
!= NULL
,
8925 VAR_DOMAIN
, LOC_TYPEDEF
,
8926 &objfile
->global_psymbols
,
8927 0, cu
->language
, objfile
);
8930 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8931 built_actual_name
!= NULL
,
8932 MODULE_DOMAIN
, LOC_TYPEDEF
,
8933 &objfile
->global_psymbols
,
8934 0, cu
->language
, objfile
);
8936 case DW_TAG_class_type
:
8937 case DW_TAG_interface_type
:
8938 case DW_TAG_structure_type
:
8939 case DW_TAG_union_type
:
8940 case DW_TAG_enumeration_type
:
8941 /* Skip external references. The DWARF standard says in the section
8942 about "Structure, Union, and Class Type Entries": "An incomplete
8943 structure, union or class type is represented by a structure,
8944 union or class entry that does not have a byte size attribute
8945 and that has a DW_AT_declaration attribute." */
8946 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
8948 xfree (built_actual_name
);
8952 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
8953 static vs. global. */
8954 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8955 built_actual_name
!= NULL
,
8956 STRUCT_DOMAIN
, LOC_TYPEDEF
,
8957 cu
->language
== language_cplus
8958 ? &objfile
->global_psymbols
8959 : &objfile
->static_psymbols
,
8960 0, cu
->language
, objfile
);
8963 case DW_TAG_enumerator
:
8964 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8965 built_actual_name
!= NULL
,
8966 VAR_DOMAIN
, LOC_CONST
,
8967 cu
->language
== language_cplus
8968 ? &objfile
->global_psymbols
8969 : &objfile
->static_psymbols
,
8970 0, cu
->language
, objfile
);
8976 xfree (built_actual_name
);
8979 /* Read a partial die corresponding to a namespace; also, add a symbol
8980 corresponding to that namespace to the symbol table. NAMESPACE is
8981 the name of the enclosing namespace. */
8984 add_partial_namespace (struct partial_die_info
*pdi
,
8985 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8986 int set_addrmap
, struct dwarf2_cu
*cu
)
8988 /* Add a symbol for the namespace. */
8990 add_partial_symbol (pdi
, cu
);
8992 /* Now scan partial symbols in that namespace. */
8994 if (pdi
->has_children
)
8995 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
8998 /* Read a partial die corresponding to a Fortran module. */
9001 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
9002 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
9004 /* Add a symbol for the namespace. */
9006 add_partial_symbol (pdi
, cu
);
9008 /* Now scan partial symbols in that module. */
9010 if (pdi
->has_children
)
9011 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
9014 /* Read a partial die corresponding to a subprogram or an inlined
9015 subprogram and create a partial symbol for that subprogram.
9016 When the CU language allows it, this routine also defines a partial
9017 symbol for each nested subprogram that this subprogram contains.
9018 If SET_ADDRMAP is true, record the covered ranges in the addrmap.
9019 Set *LOWPC and *HIGHPC to the lowest and highest PC values found in PDI.
9021 PDI may also be a lexical block, in which case we simply search
9022 recursively for subprograms defined inside that lexical block.
9023 Again, this is only performed when the CU language allows this
9024 type of definitions. */
9027 add_partial_subprogram (struct partial_die_info
*pdi
,
9028 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
9029 int set_addrmap
, struct dwarf2_cu
*cu
)
9031 if (pdi
->tag
== DW_TAG_subprogram
|| pdi
->tag
== DW_TAG_inlined_subroutine
)
9033 if (pdi
->has_pc_info
)
9035 if (pdi
->lowpc
< *lowpc
)
9036 *lowpc
= pdi
->lowpc
;
9037 if (pdi
->highpc
> *highpc
)
9038 *highpc
= pdi
->highpc
;
9041 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9042 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9047 baseaddr
= ANOFFSET (objfile
->section_offsets
,
9048 SECT_OFF_TEXT (objfile
));
9049 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
9050 pdi
->lowpc
+ baseaddr
);
9051 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
9052 pdi
->highpc
+ baseaddr
);
9053 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
9054 cu
->per_cu
->v
.psymtab
);
9058 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
9060 if (!pdi
->is_declaration
)
9061 /* Ignore subprogram DIEs that do not have a name, they are
9062 illegal. Do not emit a complaint at this point, we will
9063 do so when we convert this psymtab into a symtab. */
9065 add_partial_symbol (pdi
, cu
);
9069 if (! pdi
->has_children
)
9072 if (cu
->language
== language_ada
)
9074 pdi
= pdi
->die_child
;
9078 if (pdi
->tag
== DW_TAG_subprogram
9079 || pdi
->tag
== DW_TAG_inlined_subroutine
9080 || pdi
->tag
== DW_TAG_lexical_block
)
9081 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
9082 pdi
= pdi
->die_sibling
;
9087 /* Read a partial die corresponding to an enumeration type. */
9090 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
9091 struct dwarf2_cu
*cu
)
9093 struct partial_die_info
*pdi
;
9095 if (enum_pdi
->name
!= NULL
)
9096 add_partial_symbol (enum_pdi
, cu
);
9098 pdi
= enum_pdi
->die_child
;
9101 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
9102 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
9104 add_partial_symbol (pdi
, cu
);
9105 pdi
= pdi
->die_sibling
;
9109 /* Return the initial uleb128 in the die at INFO_PTR. */
9112 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
9114 unsigned int bytes_read
;
9116 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9119 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit
9120 READER::CU. Use READER::ABBREV_TABLE to lookup any abbreviation.
9122 Return the corresponding abbrev, or NULL if the number is zero (indicating
9123 an empty DIE). In either case *BYTES_READ will be set to the length of
9124 the initial number. */
9126 static struct abbrev_info
*
9127 peek_die_abbrev (const die_reader_specs
&reader
,
9128 const gdb_byte
*info_ptr
, unsigned int *bytes_read
)
9130 dwarf2_cu
*cu
= reader
.cu
;
9131 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
9132 unsigned int abbrev_number
9133 = read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
9135 if (abbrev_number
== 0)
9138 abbrev_info
*abbrev
= reader
.abbrev_table
->lookup_abbrev (abbrev_number
);
9141 error (_("Dwarf Error: Could not find abbrev number %d in %s"
9142 " at offset %s [in module %s]"),
9143 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
9144 sect_offset_str (cu
->header
.sect_off
), bfd_get_filename (abfd
));
9150 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
9151 Returns a pointer to the end of a series of DIEs, terminated by an empty
9152 DIE. Any children of the skipped DIEs will also be skipped. */
9154 static const gdb_byte
*
9155 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
9159 unsigned int bytes_read
;
9160 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
9163 return info_ptr
+ bytes_read
;
9165 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
9169 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
9170 INFO_PTR should point just after the initial uleb128 of a DIE, and the
9171 abbrev corresponding to that skipped uleb128 should be passed in
9172 ABBREV. Returns a pointer to this DIE's sibling, skipping any
9175 static const gdb_byte
*
9176 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
9177 struct abbrev_info
*abbrev
)
9179 unsigned int bytes_read
;
9180 struct attribute attr
;
9181 bfd
*abfd
= reader
->abfd
;
9182 struct dwarf2_cu
*cu
= reader
->cu
;
9183 const gdb_byte
*buffer
= reader
->buffer
;
9184 const gdb_byte
*buffer_end
= reader
->buffer_end
;
9185 unsigned int form
, i
;
9187 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
9189 /* The only abbrev we care about is DW_AT_sibling. */
9190 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
9192 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
9193 if (attr
.form
== DW_FORM_ref_addr
)
9194 complaint (&symfile_complaints
,
9195 _("ignoring absolute DW_AT_sibling"));
9198 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
9199 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
9201 if (sibling_ptr
< info_ptr
)
9202 complaint (&symfile_complaints
,
9203 _("DW_AT_sibling points backwards"));
9204 else if (sibling_ptr
> reader
->buffer_end
)
9205 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
9211 /* If it isn't DW_AT_sibling, skip this attribute. */
9212 form
= abbrev
->attrs
[i
].form
;
9216 case DW_FORM_ref_addr
:
9217 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
9218 and later it is offset sized. */
9219 if (cu
->header
.version
== 2)
9220 info_ptr
+= cu
->header
.addr_size
;
9222 info_ptr
+= cu
->header
.offset_size
;
9224 case DW_FORM_GNU_ref_alt
:
9225 info_ptr
+= cu
->header
.offset_size
;
9228 info_ptr
+= cu
->header
.addr_size
;
9235 case DW_FORM_flag_present
:
9236 case DW_FORM_implicit_const
:
9248 case DW_FORM_ref_sig8
:
9251 case DW_FORM_data16
:
9254 case DW_FORM_string
:
9255 read_direct_string (abfd
, info_ptr
, &bytes_read
);
9256 info_ptr
+= bytes_read
;
9258 case DW_FORM_sec_offset
:
9260 case DW_FORM_GNU_strp_alt
:
9261 info_ptr
+= cu
->header
.offset_size
;
9263 case DW_FORM_exprloc
:
9265 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9266 info_ptr
+= bytes_read
;
9268 case DW_FORM_block1
:
9269 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
9271 case DW_FORM_block2
:
9272 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
9274 case DW_FORM_block4
:
9275 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
9279 case DW_FORM_ref_udata
:
9280 case DW_FORM_GNU_addr_index
:
9281 case DW_FORM_GNU_str_index
:
9282 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
9284 case DW_FORM_indirect
:
9285 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9286 info_ptr
+= bytes_read
;
9287 /* We need to continue parsing from here, so just go back to
9289 goto skip_attribute
;
9292 error (_("Dwarf Error: Cannot handle %s "
9293 "in DWARF reader [in module %s]"),
9294 dwarf_form_name (form
),
9295 bfd_get_filename (abfd
));
9299 if (abbrev
->has_children
)
9300 return skip_children (reader
, info_ptr
);
9305 /* Locate ORIG_PDI's sibling.
9306 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
9308 static const gdb_byte
*
9309 locate_pdi_sibling (const struct die_reader_specs
*reader
,
9310 struct partial_die_info
*orig_pdi
,
9311 const gdb_byte
*info_ptr
)
9313 /* Do we know the sibling already? */
9315 if (orig_pdi
->sibling
)
9316 return orig_pdi
->sibling
;
9318 /* Are there any children to deal with? */
9320 if (!orig_pdi
->has_children
)
9323 /* Skip the children the long way. */
9325 return skip_children (reader
, info_ptr
);
9328 /* Expand this partial symbol table into a full symbol table. SELF is
9332 dwarf2_read_symtab (struct partial_symtab
*self
,
9333 struct objfile
*objfile
)
9335 struct dwarf2_per_objfile
*dwarf2_per_objfile
9336 = get_dwarf2_per_objfile (objfile
);
9340 warning (_("bug: psymtab for %s is already read in."),
9347 printf_filtered (_("Reading in symbols for %s..."),
9349 gdb_flush (gdb_stdout
);
9352 /* If this psymtab is constructed from a debug-only objfile, the
9353 has_section_at_zero flag will not necessarily be correct. We
9354 can get the correct value for this flag by looking at the data
9355 associated with the (presumably stripped) associated objfile. */
9356 if (objfile
->separate_debug_objfile_backlink
)
9358 struct dwarf2_per_objfile
*dpo_backlink
9359 = get_dwarf2_per_objfile (objfile
->separate_debug_objfile_backlink
);
9361 dwarf2_per_objfile
->has_section_at_zero
9362 = dpo_backlink
->has_section_at_zero
;
9365 dwarf2_per_objfile
->reading_partial_symbols
= 0;
9367 psymtab_to_symtab_1 (self
);
9369 /* Finish up the debug error message. */
9371 printf_filtered (_("done.\n"));
9374 process_cu_includes (dwarf2_per_objfile
);
9377 /* Reading in full CUs. */
9379 /* Add PER_CU to the queue. */
9382 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
9383 enum language pretend_language
)
9385 struct dwarf2_queue_item
*item
;
9388 item
= XNEW (struct dwarf2_queue_item
);
9389 item
->per_cu
= per_cu
;
9390 item
->pretend_language
= pretend_language
;
9393 if (dwarf2_queue
== NULL
)
9394 dwarf2_queue
= item
;
9396 dwarf2_queue_tail
->next
= item
;
9398 dwarf2_queue_tail
= item
;
9401 /* If PER_CU is not yet queued, add it to the queue.
9402 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
9404 The result is non-zero if PER_CU was queued, otherwise the result is zero
9405 meaning either PER_CU is already queued or it is already loaded.
9407 N.B. There is an invariant here that if a CU is queued then it is loaded.
9408 The caller is required to load PER_CU if we return non-zero. */
9411 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
9412 struct dwarf2_per_cu_data
*per_cu
,
9413 enum language pretend_language
)
9415 /* We may arrive here during partial symbol reading, if we need full
9416 DIEs to process an unusual case (e.g. template arguments). Do
9417 not queue PER_CU, just tell our caller to load its DIEs. */
9418 if (per_cu
->dwarf2_per_objfile
->reading_partial_symbols
)
9420 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
9425 /* Mark the dependence relation so that we don't flush PER_CU
9427 if (dependent_cu
!= NULL
)
9428 dwarf2_add_dependence (dependent_cu
, per_cu
);
9430 /* If it's already on the queue, we have nothing to do. */
9434 /* If the compilation unit is already loaded, just mark it as
9436 if (per_cu
->cu
!= NULL
)
9438 per_cu
->cu
->last_used
= 0;
9442 /* Add it to the queue. */
9443 queue_comp_unit (per_cu
, pretend_language
);
9448 /* Process the queue. */
9451 process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
9453 struct dwarf2_queue_item
*item
, *next_item
;
9455 if (dwarf_read_debug
)
9457 fprintf_unfiltered (gdb_stdlog
,
9458 "Expanding one or more symtabs of objfile %s ...\n",
9459 objfile_name (dwarf2_per_objfile
->objfile
));
9462 /* The queue starts out with one item, but following a DIE reference
9463 may load a new CU, adding it to the end of the queue. */
9464 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
9466 if ((dwarf2_per_objfile
->using_index
9467 ? !item
->per_cu
->v
.quick
->compunit_symtab
9468 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
9469 /* Skip dummy CUs. */
9470 && item
->per_cu
->cu
!= NULL
)
9472 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
9473 unsigned int debug_print_threshold
;
9476 if (per_cu
->is_debug_types
)
9478 struct signatured_type
*sig_type
=
9479 (struct signatured_type
*) per_cu
;
9481 sprintf (buf
, "TU %s at offset %s",
9482 hex_string (sig_type
->signature
),
9483 sect_offset_str (per_cu
->sect_off
));
9484 /* There can be 100s of TUs.
9485 Only print them in verbose mode. */
9486 debug_print_threshold
= 2;
9490 sprintf (buf
, "CU at offset %s",
9491 sect_offset_str (per_cu
->sect_off
));
9492 debug_print_threshold
= 1;
9495 if (dwarf_read_debug
>= debug_print_threshold
)
9496 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
9498 if (per_cu
->is_debug_types
)
9499 process_full_type_unit (per_cu
, item
->pretend_language
);
9501 process_full_comp_unit (per_cu
, item
->pretend_language
);
9503 if (dwarf_read_debug
>= debug_print_threshold
)
9504 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
9507 item
->per_cu
->queued
= 0;
9508 next_item
= item
->next
;
9512 dwarf2_queue_tail
= NULL
;
9514 if (dwarf_read_debug
)
9516 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
9517 objfile_name (dwarf2_per_objfile
->objfile
));
9521 /* Read in full symbols for PST, and anything it depends on. */
9524 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
9526 struct dwarf2_per_cu_data
*per_cu
;
9532 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
9533 if (!pst
->dependencies
[i
]->readin
9534 && pst
->dependencies
[i
]->user
== NULL
)
9536 /* Inform about additional files that need to be read in. */
9539 /* FIXME: i18n: Need to make this a single string. */
9540 fputs_filtered (" ", gdb_stdout
);
9542 fputs_filtered ("and ", gdb_stdout
);
9544 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
9545 wrap_here (""); /* Flush output. */
9546 gdb_flush (gdb_stdout
);
9548 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
9551 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
9555 /* It's an include file, no symbols to read for it.
9556 Everything is in the parent symtab. */
9561 dw2_do_instantiate_symtab (per_cu
);
9564 /* Trivial hash function for die_info: the hash value of a DIE
9565 is its offset in .debug_info for this objfile. */
9568 die_hash (const void *item
)
9570 const struct die_info
*die
= (const struct die_info
*) item
;
9572 return to_underlying (die
->sect_off
);
9575 /* Trivial comparison function for die_info structures: two DIEs
9576 are equal if they have the same offset. */
9579 die_eq (const void *item_lhs
, const void *item_rhs
)
9581 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
9582 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
9584 return die_lhs
->sect_off
== die_rhs
->sect_off
;
9587 /* die_reader_func for load_full_comp_unit.
9588 This is identical to read_signatured_type_reader,
9589 but is kept separate for now. */
9592 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
9593 const gdb_byte
*info_ptr
,
9594 struct die_info
*comp_unit_die
,
9598 struct dwarf2_cu
*cu
= reader
->cu
;
9599 enum language
*language_ptr
= (enum language
*) data
;
9601 gdb_assert (cu
->die_hash
== NULL
);
9603 htab_create_alloc_ex (cu
->header
.length
/ 12,
9607 &cu
->comp_unit_obstack
,
9608 hashtab_obstack_allocate
,
9609 dummy_obstack_deallocate
);
9612 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
9613 &info_ptr
, comp_unit_die
);
9614 cu
->dies
= comp_unit_die
;
9615 /* comp_unit_die is not stored in die_hash, no need. */
9617 /* We try not to read any attributes in this function, because not
9618 all CUs needed for references have been loaded yet, and symbol
9619 table processing isn't initialized. But we have to set the CU language,
9620 or we won't be able to build types correctly.
9621 Similarly, if we do not read the producer, we can not apply
9622 producer-specific interpretation. */
9623 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
9626 /* Load the DIEs associated with PER_CU into memory. */
9629 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
9630 enum language pretend_language
)
9632 gdb_assert (! this_cu
->is_debug_types
);
9634 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
9635 load_full_comp_unit_reader
, &pretend_language
);
9638 /* Add a DIE to the delayed physname list. */
9641 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
9642 const char *name
, struct die_info
*die
,
9643 struct dwarf2_cu
*cu
)
9645 struct delayed_method_info mi
;
9647 mi
.fnfield_index
= fnfield_index
;
9651 cu
->method_list
.push_back (mi
);
9654 /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like
9655 "const" / "volatile". If so, decrements LEN by the length of the
9656 modifier and return true. Otherwise return false. */
9660 check_modifier (const char *physname
, size_t &len
, const char (&mod
)[N
])
9662 size_t mod_len
= sizeof (mod
) - 1;
9663 if (len
> mod_len
&& startswith (physname
+ (len
- mod_len
), mod
))
9671 /* Compute the physnames of any methods on the CU's method list.
9673 The computation of method physnames is delayed in order to avoid the
9674 (bad) condition that one of the method's formal parameters is of an as yet
9678 compute_delayed_physnames (struct dwarf2_cu
*cu
)
9680 /* Only C++ delays computing physnames. */
9681 if (cu
->method_list
.empty ())
9683 gdb_assert (cu
->language
== language_cplus
);
9685 for (struct delayed_method_info
&mi
: cu
->method_list
)
9687 const char *physname
;
9688 struct fn_fieldlist
*fn_flp
9689 = &TYPE_FN_FIELDLIST (mi
.type
, mi
.fnfield_index
);
9690 physname
= dwarf2_physname (mi
.name
, mi
.die
, cu
);
9691 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
.index
)
9692 = physname
? physname
: "";
9694 /* Since there's no tag to indicate whether a method is a
9695 const/volatile overload, extract that information out of the
9697 if (physname
!= NULL
)
9699 size_t len
= strlen (physname
);
9703 if (physname
[len
] == ')') /* shortcut */
9705 else if (check_modifier (physname
, len
, " const"))
9706 TYPE_FN_FIELD_CONST (fn_flp
->fn_fields
, mi
.index
) = 1;
9707 else if (check_modifier (physname
, len
, " volatile"))
9708 TYPE_FN_FIELD_VOLATILE (fn_flp
->fn_fields
, mi
.index
) = 1;
9715 /* The list is no longer needed. */
9716 cu
->method_list
.clear ();
9719 /* Go objects should be embedded in a DW_TAG_module DIE,
9720 and it's not clear if/how imported objects will appear.
9721 To keep Go support simple until that's worked out,
9722 go back through what we've read and create something usable.
9723 We could do this while processing each DIE, and feels kinda cleaner,
9724 but that way is more invasive.
9725 This is to, for example, allow the user to type "p var" or "b main"
9726 without having to specify the package name, and allow lookups
9727 of module.object to work in contexts that use the expression
9731 fixup_go_packaging (struct dwarf2_cu
*cu
)
9733 char *package_name
= NULL
;
9734 struct pending
*list
;
9737 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
9739 for (i
= 0; i
< list
->nsyms
; ++i
)
9741 struct symbol
*sym
= list
->symbol
[i
];
9743 if (SYMBOL_LANGUAGE (sym
) == language_go
9744 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
9746 char *this_package_name
= go_symbol_package_name (sym
);
9748 if (this_package_name
== NULL
)
9750 if (package_name
== NULL
)
9751 package_name
= this_package_name
;
9754 struct objfile
*objfile
9755 = cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9756 if (strcmp (package_name
, this_package_name
) != 0)
9757 complaint (&symfile_complaints
,
9758 _("Symtab %s has objects from two different Go packages: %s and %s"),
9759 (symbol_symtab (sym
) != NULL
9760 ? symtab_to_filename_for_display
9761 (symbol_symtab (sym
))
9762 : objfile_name (objfile
)),
9763 this_package_name
, package_name
);
9764 xfree (this_package_name
);
9770 if (package_name
!= NULL
)
9772 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9773 const char *saved_package_name
9774 = (const char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
9776 strlen (package_name
));
9777 struct type
*type
= init_type (objfile
, TYPE_CODE_MODULE
, 0,
9778 saved_package_name
);
9781 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
9783 sym
= allocate_symbol (objfile
);
9784 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
9785 SYMBOL_SET_NAMES (sym
, saved_package_name
,
9786 strlen (saved_package_name
), 0, objfile
);
9787 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
9788 e.g., "main" finds the "main" module and not C's main(). */
9789 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
9790 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
9791 SYMBOL_TYPE (sym
) = type
;
9793 add_symbol_to_list (sym
, &global_symbols
);
9795 xfree (package_name
);
9799 /* Allocate a fully-qualified name consisting of the two parts on the
9803 rust_fully_qualify (struct obstack
*obstack
, const char *p1
, const char *p2
)
9805 return obconcat (obstack
, p1
, "::", p2
, (char *) NULL
);
9808 /* A helper that allocates a struct discriminant_info to attach to a
9811 static struct discriminant_info
*
9812 alloc_discriminant_info (struct type
*type
, int discriminant_index
,
9815 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_UNION
);
9816 gdb_assert (discriminant_index
== -1
9817 || (discriminant_index
>= 0
9818 && discriminant_index
< TYPE_NFIELDS (type
)));
9819 gdb_assert (default_index
== -1
9820 || (default_index
>= 0 && default_index
< TYPE_NFIELDS (type
)));
9822 TYPE_FLAG_DISCRIMINATED_UNION (type
) = 1;
9824 struct discriminant_info
*disc
9825 = ((struct discriminant_info
*)
9827 offsetof (struct discriminant_info
, discriminants
)
9828 + TYPE_NFIELDS (type
) * sizeof (disc
->discriminants
[0])));
9829 disc
->default_index
= default_index
;
9830 disc
->discriminant_index
= discriminant_index
;
9832 struct dynamic_prop prop
;
9833 prop
.kind
= PROP_UNDEFINED
;
9834 prop
.data
.baton
= disc
;
9836 add_dyn_prop (DYN_PROP_DISCRIMINATED
, prop
, type
);
9841 /* Some versions of rustc emitted enums in an unusual way.
9843 Ordinary enums were emitted as unions. The first element of each
9844 structure in the union was named "RUST$ENUM$DISR". This element
9845 held the discriminant.
9847 These versions of Rust also implemented the "non-zero"
9848 optimization. When the enum had two values, and one is empty and
9849 the other holds a pointer that cannot be zero, the pointer is used
9850 as the discriminant, with a zero value meaning the empty variant.
9851 Here, the union's first member is of the form
9852 RUST$ENCODED$ENUM$<fieldno>$<fieldno>$...$<variantname>
9853 where the fieldnos are the indices of the fields that should be
9854 traversed in order to find the field (which may be several fields deep)
9855 and the variantname is the name of the variant of the case when the
9858 This function recognizes whether TYPE is of one of these forms,
9859 and, if so, smashes it to be a variant type. */
9862 quirk_rust_enum (struct type
*type
, struct objfile
*objfile
)
9864 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_UNION
);
9866 /* We don't need to deal with empty enums. */
9867 if (TYPE_NFIELDS (type
) == 0)
9870 #define RUST_ENUM_PREFIX "RUST$ENCODED$ENUM$"
9871 if (TYPE_NFIELDS (type
) == 1
9872 && startswith (TYPE_FIELD_NAME (type
, 0), RUST_ENUM_PREFIX
))
9874 const char *name
= TYPE_FIELD_NAME (type
, 0) + strlen (RUST_ENUM_PREFIX
);
9876 /* Decode the field name to find the offset of the
9878 ULONGEST bit_offset
= 0;
9879 struct type
*field_type
= TYPE_FIELD_TYPE (type
, 0);
9880 while (name
[0] >= '0' && name
[0] <= '9')
9883 unsigned long index
= strtoul (name
, &tail
, 10);
9886 || index
>= TYPE_NFIELDS (field_type
)
9887 || (TYPE_FIELD_LOC_KIND (field_type
, index
)
9888 != FIELD_LOC_KIND_BITPOS
))
9890 complaint (&symfile_complaints
,
9891 _("Could not parse Rust enum encoding string \"%s\""
9893 TYPE_FIELD_NAME (type
, 0),
9894 objfile_name (objfile
));
9899 bit_offset
+= TYPE_FIELD_BITPOS (field_type
, index
);
9900 field_type
= TYPE_FIELD_TYPE (field_type
, index
);
9903 /* Make a union to hold the variants. */
9904 struct type
*union_type
= alloc_type (objfile
);
9905 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
9906 TYPE_NFIELDS (union_type
) = 3;
9907 TYPE_FIELDS (union_type
)
9908 = (struct field
*) TYPE_ZALLOC (type
, 3 * sizeof (struct field
));
9909 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
9910 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
9912 /* Put the discriminant must at index 0. */
9913 TYPE_FIELD_TYPE (union_type
, 0) = field_type
;
9914 TYPE_FIELD_ARTIFICIAL (union_type
, 0) = 1;
9915 TYPE_FIELD_NAME (union_type
, 0) = "<<discriminant>>";
9916 SET_FIELD_BITPOS (TYPE_FIELD (union_type
, 0), bit_offset
);
9918 /* The order of fields doesn't really matter, so put the real
9919 field at index 1 and the data-less field at index 2. */
9920 struct discriminant_info
*disc
9921 = alloc_discriminant_info (union_type
, 0, 1);
9922 TYPE_FIELD (union_type
, 1) = TYPE_FIELD (type
, 0);
9923 TYPE_FIELD_NAME (union_type
, 1)
9924 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type
, 1)));
9925 TYPE_NAME (TYPE_FIELD_TYPE (union_type
, 1))
9926 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
9927 TYPE_FIELD_NAME (union_type
, 1));
9929 const char *dataless_name
9930 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
9932 struct type
*dataless_type
= init_type (objfile
, TYPE_CODE_VOID
, 0,
9934 TYPE_FIELD_TYPE (union_type
, 2) = dataless_type
;
9935 /* NAME points into the original discriminant name, which
9936 already has the correct lifetime. */
9937 TYPE_FIELD_NAME (union_type
, 2) = name
;
9938 SET_FIELD_BITPOS (TYPE_FIELD (union_type
, 2), 0);
9939 disc
->discriminants
[2] = 0;
9941 /* Smash this type to be a structure type. We have to do this
9942 because the type has already been recorded. */
9943 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
9944 TYPE_NFIELDS (type
) = 1;
9946 = (struct field
*) TYPE_ZALLOC (type
, sizeof (struct field
));
9948 /* Install the variant part. */
9949 TYPE_FIELD_TYPE (type
, 0) = union_type
;
9950 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
9951 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
9953 else if (TYPE_NFIELDS (type
) == 1)
9955 /* We assume that a union with a single field is a univariant
9957 /* Smash this type to be a structure type. We have to do this
9958 because the type has already been recorded. */
9959 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
9961 /* Make a union to hold the variants. */
9962 struct type
*union_type
= alloc_type (objfile
);
9963 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
9964 TYPE_NFIELDS (union_type
) = TYPE_NFIELDS (type
);
9965 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
9966 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
9967 TYPE_FIELDS (union_type
) = TYPE_FIELDS (type
);
9969 struct type
*field_type
= TYPE_FIELD_TYPE (union_type
, 0);
9970 const char *variant_name
9971 = rust_last_path_segment (TYPE_NAME (field_type
));
9972 TYPE_FIELD_NAME (union_type
, 0) = variant_name
;
9973 TYPE_NAME (field_type
)
9974 = rust_fully_qualify (&objfile
->objfile_obstack
,
9975 TYPE_NAME (type
), variant_name
);
9977 /* Install the union in the outer struct type. */
9978 TYPE_NFIELDS (type
) = 1;
9980 = (struct field
*) TYPE_ZALLOC (union_type
, sizeof (struct field
));
9981 TYPE_FIELD_TYPE (type
, 0) = union_type
;
9982 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
9983 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
9985 alloc_discriminant_info (union_type
, -1, 0);
9989 struct type
*disr_type
= nullptr;
9990 for (int i
= 0; i
< TYPE_NFIELDS (type
); ++i
)
9992 disr_type
= TYPE_FIELD_TYPE (type
, i
);
9994 if (TYPE_CODE (disr_type
) != TYPE_CODE_STRUCT
)
9996 /* All fields of a true enum will be structs. */
9999 else if (TYPE_NFIELDS (disr_type
) == 0)
10001 /* Could be data-less variant, so keep going. */
10002 disr_type
= nullptr;
10004 else if (strcmp (TYPE_FIELD_NAME (disr_type
, 0),
10005 "RUST$ENUM$DISR") != 0)
10007 /* Not a Rust enum. */
10017 /* If we got here without a discriminant, then it's probably
10019 if (disr_type
== nullptr)
10022 /* Smash this type to be a structure type. We have to do this
10023 because the type has already been recorded. */
10024 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
10026 /* Make a union to hold the variants. */
10027 struct field
*disr_field
= &TYPE_FIELD (disr_type
, 0);
10028 struct type
*union_type
= alloc_type (objfile
);
10029 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
10030 TYPE_NFIELDS (union_type
) = 1 + TYPE_NFIELDS (type
);
10031 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
10032 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
10033 TYPE_FIELDS (union_type
)
10034 = (struct field
*) TYPE_ZALLOC (union_type
,
10035 (TYPE_NFIELDS (union_type
)
10036 * sizeof (struct field
)));
10038 memcpy (TYPE_FIELDS (union_type
) + 1, TYPE_FIELDS (type
),
10039 TYPE_NFIELDS (type
) * sizeof (struct field
));
10041 /* Install the discriminant at index 0 in the union. */
10042 TYPE_FIELD (union_type
, 0) = *disr_field
;
10043 TYPE_FIELD_ARTIFICIAL (union_type
, 0) = 1;
10044 TYPE_FIELD_NAME (union_type
, 0) = "<<discriminant>>";
10046 /* Install the union in the outer struct type. */
10047 TYPE_FIELD_TYPE (type
, 0) = union_type
;
10048 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
10049 TYPE_NFIELDS (type
) = 1;
10051 /* Set the size and offset of the union type. */
10052 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
10054 /* We need a way to find the correct discriminant given a
10055 variant name. For convenience we build a map here. */
10056 struct type
*enum_type
= FIELD_TYPE (*disr_field
);
10057 std::unordered_map
<std::string
, ULONGEST
> discriminant_map
;
10058 for (int i
= 0; i
< TYPE_NFIELDS (enum_type
); ++i
)
10060 if (TYPE_FIELD_LOC_KIND (enum_type
, i
) == FIELD_LOC_KIND_ENUMVAL
)
10063 = rust_last_path_segment (TYPE_FIELD_NAME (enum_type
, i
));
10064 discriminant_map
[name
] = TYPE_FIELD_ENUMVAL (enum_type
, i
);
10068 int n_fields
= TYPE_NFIELDS (union_type
);
10069 struct discriminant_info
*disc
10070 = alloc_discriminant_info (union_type
, 0, -1);
10071 /* Skip the discriminant here. */
10072 for (int i
= 1; i
< n_fields
; ++i
)
10074 /* Find the final word in the name of this variant's type.
10075 That name can be used to look up the correct
10077 const char *variant_name
10078 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type
,
10081 auto iter
= discriminant_map
.find (variant_name
);
10082 if (iter
!= discriminant_map
.end ())
10083 disc
->discriminants
[i
] = iter
->second
;
10085 /* Remove the discriminant field, if it exists. */
10086 struct type
*sub_type
= TYPE_FIELD_TYPE (union_type
, i
);
10087 if (TYPE_NFIELDS (sub_type
) > 0)
10089 --TYPE_NFIELDS (sub_type
);
10090 ++TYPE_FIELDS (sub_type
);
10092 TYPE_FIELD_NAME (union_type
, i
) = variant_name
;
10093 TYPE_NAME (sub_type
)
10094 = rust_fully_qualify (&objfile
->objfile_obstack
,
10095 TYPE_NAME (type
), variant_name
);
10100 /* Rewrite some Rust unions to be structures with variants parts. */
10103 rust_union_quirks (struct dwarf2_cu
*cu
)
10105 gdb_assert (cu
->language
== language_rust
);
10106 for (struct type
*type
: cu
->rust_unions
)
10107 quirk_rust_enum (type
, cu
->per_cu
->dwarf2_per_objfile
->objfile
);
10110 /* Return the symtab for PER_CU. This works properly regardless of
10111 whether we're using the index or psymtabs. */
10113 static struct compunit_symtab
*
10114 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
10116 return (per_cu
->dwarf2_per_objfile
->using_index
10117 ? per_cu
->v
.quick
->compunit_symtab
10118 : per_cu
->v
.psymtab
->compunit_symtab
);
10121 /* A helper function for computing the list of all symbol tables
10122 included by PER_CU. */
10125 recursively_compute_inclusions (VEC (compunit_symtab_ptr
) **result
,
10126 htab_t all_children
, htab_t all_type_symtabs
,
10127 struct dwarf2_per_cu_data
*per_cu
,
10128 struct compunit_symtab
*immediate_parent
)
10132 struct compunit_symtab
*cust
;
10133 struct dwarf2_per_cu_data
*iter
;
10135 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
10138 /* This inclusion and its children have been processed. */
10143 /* Only add a CU if it has a symbol table. */
10144 cust
= get_compunit_symtab (per_cu
);
10147 /* If this is a type unit only add its symbol table if we haven't
10148 seen it yet (type unit per_cu's can share symtabs). */
10149 if (per_cu
->is_debug_types
)
10151 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
10155 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
10156 if (cust
->user
== NULL
)
10157 cust
->user
= immediate_parent
;
10162 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
10163 if (cust
->user
== NULL
)
10164 cust
->user
= immediate_parent
;
10169 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
10172 recursively_compute_inclusions (result
, all_children
,
10173 all_type_symtabs
, iter
, cust
);
10177 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
10181 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
10183 gdb_assert (! per_cu
->is_debug_types
);
10185 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
10188 struct dwarf2_per_cu_data
*per_cu_iter
;
10189 struct compunit_symtab
*compunit_symtab_iter
;
10190 VEC (compunit_symtab_ptr
) *result_symtabs
= NULL
;
10191 htab_t all_children
, all_type_symtabs
;
10192 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
10194 /* If we don't have a symtab, we can just skip this case. */
10198 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
10199 NULL
, xcalloc
, xfree
);
10200 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
10201 NULL
, xcalloc
, xfree
);
10204 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
10208 recursively_compute_inclusions (&result_symtabs
, all_children
,
10209 all_type_symtabs
, per_cu_iter
,
10213 /* Now we have a transitive closure of all the included symtabs. */
10214 len
= VEC_length (compunit_symtab_ptr
, result_symtabs
);
10216 = XOBNEWVEC (&per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
,
10217 struct compunit_symtab
*, len
+ 1);
10219 VEC_iterate (compunit_symtab_ptr
, result_symtabs
, ix
,
10220 compunit_symtab_iter
);
10222 cust
->includes
[ix
] = compunit_symtab_iter
;
10223 cust
->includes
[len
] = NULL
;
10225 VEC_free (compunit_symtab_ptr
, result_symtabs
);
10226 htab_delete (all_children
);
10227 htab_delete (all_type_symtabs
);
10231 /* Compute the 'includes' field for the symtabs of all the CUs we just
10235 process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
10238 struct dwarf2_per_cu_data
*iter
;
10241 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
10245 if (! iter
->is_debug_types
)
10246 compute_compunit_symtab_includes (iter
);
10249 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
10252 /* Generate full symbol information for PER_CU, whose DIEs have
10253 already been loaded into memory. */
10256 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
10257 enum language pretend_language
)
10259 struct dwarf2_cu
*cu
= per_cu
->cu
;
10260 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
10261 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10262 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
10263 CORE_ADDR lowpc
, highpc
;
10264 struct compunit_symtab
*cust
;
10265 CORE_ADDR baseaddr
;
10266 struct block
*static_block
;
10269 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
10272 scoped_free_pendings free_pending
;
10274 /* Clear the list here in case something was left over. */
10275 cu
->method_list
.clear ();
10277 cu
->list_in_scope
= &file_symbols
;
10279 cu
->language
= pretend_language
;
10280 cu
->language_defn
= language_def (cu
->language
);
10282 /* Do line number decoding in read_file_scope () */
10283 process_die (cu
->dies
, cu
);
10285 /* For now fudge the Go package. */
10286 if (cu
->language
== language_go
)
10287 fixup_go_packaging (cu
);
10289 /* Now that we have processed all the DIEs in the CU, all the types
10290 should be complete, and it should now be safe to compute all of the
10292 compute_delayed_physnames (cu
);
10294 if (cu
->language
== language_rust
)
10295 rust_union_quirks (cu
);
10297 /* Some compilers don't define a DW_AT_high_pc attribute for the
10298 compilation unit. If the DW_AT_high_pc is missing, synthesize
10299 it, by scanning the DIE's below the compilation unit. */
10300 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
10302 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
10303 static_block
= end_symtab_get_static_block (addr
, 0, 1);
10305 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
10306 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
10307 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
10308 addrmap to help ensure it has an accurate map of pc values belonging to
10310 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
10312 cust
= end_symtab_from_static_block (static_block
,
10313 SECT_OFF_TEXT (objfile
), 0);
10317 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
10319 /* Set symtab language to language from DW_AT_language. If the
10320 compilation is from a C file generated by language preprocessors, do
10321 not set the language if it was already deduced by start_subfile. */
10322 if (!(cu
->language
== language_c
10323 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
10324 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
10326 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
10327 produce DW_AT_location with location lists but it can be possibly
10328 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
10329 there were bugs in prologue debug info, fixed later in GCC-4.5
10330 by "unwind info for epilogues" patch (which is not directly related).
10332 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
10333 needed, it would be wrong due to missing DW_AT_producer there.
10335 Still one can confuse GDB by using non-standard GCC compilation
10336 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
10338 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
10339 cust
->locations_valid
= 1;
10341 if (gcc_4_minor
>= 5)
10342 cust
->epilogue_unwind_valid
= 1;
10344 cust
->call_site_htab
= cu
->call_site_htab
;
10347 if (dwarf2_per_objfile
->using_index
)
10348 per_cu
->v
.quick
->compunit_symtab
= cust
;
10351 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
10352 pst
->compunit_symtab
= cust
;
10356 /* Push it for inclusion processing later. */
10357 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
10360 /* Generate full symbol information for type unit PER_CU, whose DIEs have
10361 already been loaded into memory. */
10364 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
10365 enum language pretend_language
)
10367 struct dwarf2_cu
*cu
= per_cu
->cu
;
10368 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
10369 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10370 struct compunit_symtab
*cust
;
10371 struct signatured_type
*sig_type
;
10373 gdb_assert (per_cu
->is_debug_types
);
10374 sig_type
= (struct signatured_type
*) per_cu
;
10377 scoped_free_pendings free_pending
;
10379 /* Clear the list here in case something was left over. */
10380 cu
->method_list
.clear ();
10382 cu
->list_in_scope
= &file_symbols
;
10384 cu
->language
= pretend_language
;
10385 cu
->language_defn
= language_def (cu
->language
);
10387 /* The symbol tables are set up in read_type_unit_scope. */
10388 process_die (cu
->dies
, cu
);
10390 /* For now fudge the Go package. */
10391 if (cu
->language
== language_go
)
10392 fixup_go_packaging (cu
);
10394 /* Now that we have processed all the DIEs in the CU, all the types
10395 should be complete, and it should now be safe to compute all of the
10397 compute_delayed_physnames (cu
);
10399 if (cu
->language
== language_rust
)
10400 rust_union_quirks (cu
);
10402 /* TUs share symbol tables.
10403 If this is the first TU to use this symtab, complete the construction
10404 of it with end_expandable_symtab. Otherwise, complete the addition of
10405 this TU's symbols to the existing symtab. */
10406 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
10408 cust
= end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
10409 sig_type
->type_unit_group
->compunit_symtab
= cust
;
10413 /* Set symtab language to language from DW_AT_language. If the
10414 compilation is from a C file generated by language preprocessors,
10415 do not set the language if it was already deduced by
10417 if (!(cu
->language
== language_c
10418 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
10419 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
10424 augment_type_symtab ();
10425 cust
= sig_type
->type_unit_group
->compunit_symtab
;
10428 if (dwarf2_per_objfile
->using_index
)
10429 per_cu
->v
.quick
->compunit_symtab
= cust
;
10432 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
10433 pst
->compunit_symtab
= cust
;
10438 /* Process an imported unit DIE. */
10441 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10443 struct attribute
*attr
;
10445 /* For now we don't handle imported units in type units. */
10446 if (cu
->per_cu
->is_debug_types
)
10448 error (_("Dwarf Error: DW_TAG_imported_unit is not"
10449 " supported in type units [in module %s]"),
10450 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
10453 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
10456 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
10457 bool is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
10458 dwarf2_per_cu_data
*per_cu
10459 = dwarf2_find_containing_comp_unit (sect_off
, is_dwz
,
10460 cu
->per_cu
->dwarf2_per_objfile
);
10462 /* If necessary, add it to the queue and load its DIEs. */
10463 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
10464 load_full_comp_unit (per_cu
, cu
->language
);
10466 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
10471 /* RAII object that represents a process_die scope: i.e.,
10472 starts/finishes processing a DIE. */
10473 class process_die_scope
10476 process_die_scope (die_info
*die
, dwarf2_cu
*cu
)
10477 : m_die (die
), m_cu (cu
)
10479 /* We should only be processing DIEs not already in process. */
10480 gdb_assert (!m_die
->in_process
);
10481 m_die
->in_process
= true;
10484 ~process_die_scope ()
10486 m_die
->in_process
= false;
10488 /* If we're done processing the DIE for the CU that owns the line
10489 header, we don't need the line header anymore. */
10490 if (m_cu
->line_header_die_owner
== m_die
)
10492 delete m_cu
->line_header
;
10493 m_cu
->line_header
= NULL
;
10494 m_cu
->line_header_die_owner
= NULL
;
10503 /* Process a die and its children. */
10506 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10508 process_die_scope
scope (die
, cu
);
10512 case DW_TAG_padding
:
10514 case DW_TAG_compile_unit
:
10515 case DW_TAG_partial_unit
:
10516 read_file_scope (die
, cu
);
10518 case DW_TAG_type_unit
:
10519 read_type_unit_scope (die
, cu
);
10521 case DW_TAG_subprogram
:
10522 case DW_TAG_inlined_subroutine
:
10523 read_func_scope (die
, cu
);
10525 case DW_TAG_lexical_block
:
10526 case DW_TAG_try_block
:
10527 case DW_TAG_catch_block
:
10528 read_lexical_block_scope (die
, cu
);
10530 case DW_TAG_call_site
:
10531 case DW_TAG_GNU_call_site
:
10532 read_call_site_scope (die
, cu
);
10534 case DW_TAG_class_type
:
10535 case DW_TAG_interface_type
:
10536 case DW_TAG_structure_type
:
10537 case DW_TAG_union_type
:
10538 process_structure_scope (die
, cu
);
10540 case DW_TAG_enumeration_type
:
10541 process_enumeration_scope (die
, cu
);
10544 /* These dies have a type, but processing them does not create
10545 a symbol or recurse to process the children. Therefore we can
10546 read them on-demand through read_type_die. */
10547 case DW_TAG_subroutine_type
:
10548 case DW_TAG_set_type
:
10549 case DW_TAG_array_type
:
10550 case DW_TAG_pointer_type
:
10551 case DW_TAG_ptr_to_member_type
:
10552 case DW_TAG_reference_type
:
10553 case DW_TAG_rvalue_reference_type
:
10554 case DW_TAG_string_type
:
10557 case DW_TAG_base_type
:
10558 case DW_TAG_subrange_type
:
10559 case DW_TAG_typedef
:
10560 /* Add a typedef symbol for the type definition, if it has a
10562 new_symbol (die
, read_type_die (die
, cu
), cu
);
10564 case DW_TAG_common_block
:
10565 read_common_block (die
, cu
);
10567 case DW_TAG_common_inclusion
:
10569 case DW_TAG_namespace
:
10570 cu
->processing_has_namespace_info
= 1;
10571 read_namespace (die
, cu
);
10573 case DW_TAG_module
:
10574 cu
->processing_has_namespace_info
= 1;
10575 read_module (die
, cu
);
10577 case DW_TAG_imported_declaration
:
10578 cu
->processing_has_namespace_info
= 1;
10579 if (read_namespace_alias (die
, cu
))
10581 /* The declaration is not a global namespace alias. */
10582 /* Fall through. */
10583 case DW_TAG_imported_module
:
10584 cu
->processing_has_namespace_info
= 1;
10585 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
10586 || cu
->language
!= language_fortran
))
10587 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
10588 dwarf_tag_name (die
->tag
));
10589 read_import_statement (die
, cu
);
10592 case DW_TAG_imported_unit
:
10593 process_imported_unit_die (die
, cu
);
10596 case DW_TAG_variable
:
10597 read_variable (die
, cu
);
10601 new_symbol (die
, NULL
, cu
);
10606 /* DWARF name computation. */
10608 /* A helper function for dwarf2_compute_name which determines whether DIE
10609 needs to have the name of the scope prepended to the name listed in the
10613 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
10615 struct attribute
*attr
;
10619 case DW_TAG_namespace
:
10620 case DW_TAG_typedef
:
10621 case DW_TAG_class_type
:
10622 case DW_TAG_interface_type
:
10623 case DW_TAG_structure_type
:
10624 case DW_TAG_union_type
:
10625 case DW_TAG_enumeration_type
:
10626 case DW_TAG_enumerator
:
10627 case DW_TAG_subprogram
:
10628 case DW_TAG_inlined_subroutine
:
10629 case DW_TAG_member
:
10630 case DW_TAG_imported_declaration
:
10633 case DW_TAG_variable
:
10634 case DW_TAG_constant
:
10635 /* We only need to prefix "globally" visible variables. These include
10636 any variable marked with DW_AT_external or any variable that
10637 lives in a namespace. [Variables in anonymous namespaces
10638 require prefixing, but they are not DW_AT_external.] */
10640 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
10642 struct dwarf2_cu
*spec_cu
= cu
;
10644 return die_needs_namespace (die_specification (die
, &spec_cu
),
10648 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
10649 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
10650 && die
->parent
->tag
!= DW_TAG_module
)
10652 /* A variable in a lexical block of some kind does not need a
10653 namespace, even though in C++ such variables may be external
10654 and have a mangled name. */
10655 if (die
->parent
->tag
== DW_TAG_lexical_block
10656 || die
->parent
->tag
== DW_TAG_try_block
10657 || die
->parent
->tag
== DW_TAG_catch_block
10658 || die
->parent
->tag
== DW_TAG_subprogram
)
10667 /* Return the DIE's linkage name attribute, either DW_AT_linkage_name
10668 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10669 defined for the given DIE. */
10671 static struct attribute
*
10672 dw2_linkage_name_attr (struct die_info
*die
, struct dwarf2_cu
*cu
)
10674 struct attribute
*attr
;
10676 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
10678 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10683 /* Return the DIE's linkage name as a string, either DW_AT_linkage_name
10684 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10685 defined for the given DIE. */
10687 static const char *
10688 dw2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
10690 const char *linkage_name
;
10692 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
10693 if (linkage_name
== NULL
)
10694 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10696 return linkage_name
;
10699 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
10700 compute the physname for the object, which include a method's:
10701 - formal parameters (C++),
10702 - receiver type (Go),
10704 The term "physname" is a bit confusing.
10705 For C++, for example, it is the demangled name.
10706 For Go, for example, it's the mangled name.
10708 For Ada, return the DIE's linkage name rather than the fully qualified
10709 name. PHYSNAME is ignored..
10711 The result is allocated on the objfile_obstack and canonicalized. */
10713 static const char *
10714 dwarf2_compute_name (const char *name
,
10715 struct die_info
*die
, struct dwarf2_cu
*cu
,
10718 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10721 name
= dwarf2_name (die
, cu
);
10723 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
10724 but otherwise compute it by typename_concat inside GDB.
10725 FIXME: Actually this is not really true, or at least not always true.
10726 It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle
10727 Fortran names because there is no mangling standard. So new_symbol
10728 will set the demangled name to the result of dwarf2_full_name, and it is
10729 the demangled name that GDB uses if it exists. */
10730 if (cu
->language
== language_ada
10731 || (cu
->language
== language_fortran
&& physname
))
10733 /* For Ada unit, we prefer the linkage name over the name, as
10734 the former contains the exported name, which the user expects
10735 to be able to reference. Ideally, we want the user to be able
10736 to reference this entity using either natural or linkage name,
10737 but we haven't started looking at this enhancement yet. */
10738 const char *linkage_name
= dw2_linkage_name (die
, cu
);
10740 if (linkage_name
!= NULL
)
10741 return linkage_name
;
10744 /* These are the only languages we know how to qualify names in. */
10746 && (cu
->language
== language_cplus
10747 || cu
->language
== language_fortran
|| cu
->language
== language_d
10748 || cu
->language
== language_rust
))
10750 if (die_needs_namespace (die
, cu
))
10752 const char *prefix
;
10753 const char *canonical_name
= NULL
;
10757 prefix
= determine_prefix (die
, cu
);
10758 if (*prefix
!= '\0')
10760 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
10763 buf
.puts (prefixed_name
);
10764 xfree (prefixed_name
);
10769 /* Template parameters may be specified in the DIE's DW_AT_name, or
10770 as children with DW_TAG_template_type_param or
10771 DW_TAG_value_type_param. If the latter, add them to the name
10772 here. If the name already has template parameters, then
10773 skip this step; some versions of GCC emit both, and
10774 it is more efficient to use the pre-computed name.
10776 Something to keep in mind about this process: it is very
10777 unlikely, or in some cases downright impossible, to produce
10778 something that will match the mangled name of a function.
10779 If the definition of the function has the same debug info,
10780 we should be able to match up with it anyway. But fallbacks
10781 using the minimal symbol, for instance to find a method
10782 implemented in a stripped copy of libstdc++, will not work.
10783 If we do not have debug info for the definition, we will have to
10784 match them up some other way.
10786 When we do name matching there is a related problem with function
10787 templates; two instantiated function templates are allowed to
10788 differ only by their return types, which we do not add here. */
10790 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
10792 struct attribute
*attr
;
10793 struct die_info
*child
;
10796 die
->building_fullname
= 1;
10798 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
10802 const gdb_byte
*bytes
;
10803 struct dwarf2_locexpr_baton
*baton
;
10806 if (child
->tag
!= DW_TAG_template_type_param
10807 && child
->tag
!= DW_TAG_template_value_param
)
10818 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
10821 complaint (&symfile_complaints
,
10822 _("template parameter missing DW_AT_type"));
10823 buf
.puts ("UNKNOWN_TYPE");
10826 type
= die_type (child
, cu
);
10828 if (child
->tag
== DW_TAG_template_type_param
)
10830 c_print_type (type
, "", &buf
, -1, 0, &type_print_raw_options
);
10834 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
10837 complaint (&symfile_complaints
,
10838 _("template parameter missing "
10839 "DW_AT_const_value"));
10840 buf
.puts ("UNKNOWN_VALUE");
10844 dwarf2_const_value_attr (attr
, type
, name
,
10845 &cu
->comp_unit_obstack
, cu
,
10846 &value
, &bytes
, &baton
);
10848 if (TYPE_NOSIGN (type
))
10849 /* GDB prints characters as NUMBER 'CHAR'. If that's
10850 changed, this can use value_print instead. */
10851 c_printchar (value
, type
, &buf
);
10854 struct value_print_options opts
;
10857 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
10861 else if (bytes
!= NULL
)
10863 v
= allocate_value (type
);
10864 memcpy (value_contents_writeable (v
), bytes
,
10865 TYPE_LENGTH (type
));
10868 v
= value_from_longest (type
, value
);
10870 /* Specify decimal so that we do not depend on
10872 get_formatted_print_options (&opts
, 'd');
10874 value_print (v
, &buf
, &opts
);
10879 die
->building_fullname
= 0;
10883 /* Close the argument list, with a space if necessary
10884 (nested templates). */
10885 if (!buf
.empty () && buf
.string ().back () == '>')
10892 /* For C++ methods, append formal parameter type
10893 information, if PHYSNAME. */
10895 if (physname
&& die
->tag
== DW_TAG_subprogram
10896 && cu
->language
== language_cplus
)
10898 struct type
*type
= read_type_die (die
, cu
);
10900 c_type_print_args (type
, &buf
, 1, cu
->language
,
10901 &type_print_raw_options
);
10903 if (cu
->language
== language_cplus
)
10905 /* Assume that an artificial first parameter is
10906 "this", but do not crash if it is not. RealView
10907 marks unnamed (and thus unused) parameters as
10908 artificial; there is no way to differentiate
10910 if (TYPE_NFIELDS (type
) > 0
10911 && TYPE_FIELD_ARTIFICIAL (type
, 0)
10912 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
10913 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
10915 buf
.puts (" const");
10919 const std::string
&intermediate_name
= buf
.string ();
10921 if (cu
->language
== language_cplus
)
10923 = dwarf2_canonicalize_name (intermediate_name
.c_str (), cu
,
10924 &objfile
->per_bfd
->storage_obstack
);
10926 /* If we only computed INTERMEDIATE_NAME, or if
10927 INTERMEDIATE_NAME is already canonical, then we need to
10928 copy it to the appropriate obstack. */
10929 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
.c_str ())
10930 name
= ((const char *)
10931 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
10932 intermediate_name
.c_str (),
10933 intermediate_name
.length ()));
10935 name
= canonical_name
;
10942 /* Return the fully qualified name of DIE, based on its DW_AT_name.
10943 If scope qualifiers are appropriate they will be added. The result
10944 will be allocated on the storage_obstack, or NULL if the DIE does
10945 not have a name. NAME may either be from a previous call to
10946 dwarf2_name or NULL.
10948 The output string will be canonicalized (if C++). */
10950 static const char *
10951 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10953 return dwarf2_compute_name (name
, die
, cu
, 0);
10956 /* Construct a physname for the given DIE in CU. NAME may either be
10957 from a previous call to dwarf2_name or NULL. The result will be
10958 allocated on the objfile_objstack or NULL if the DIE does not have a
10961 The output string will be canonicalized (if C++). */
10963 static const char *
10964 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10966 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10967 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
10970 /* In this case dwarf2_compute_name is just a shortcut not building anything
10972 if (!die_needs_namespace (die
, cu
))
10973 return dwarf2_compute_name (name
, die
, cu
, 1);
10975 mangled
= dw2_linkage_name (die
, cu
);
10977 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
10978 See https://github.com/rust-lang/rust/issues/32925. */
10979 if (cu
->language
== language_rust
&& mangled
!= NULL
10980 && strchr (mangled
, '{') != NULL
)
10983 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
10985 gdb::unique_xmalloc_ptr
<char> demangled
;
10986 if (mangled
!= NULL
)
10989 if (language_def (cu
->language
)->la_store_sym_names_in_linkage_form_p
)
10991 /* Do nothing (do not demangle the symbol name). */
10993 else if (cu
->language
== language_go
)
10995 /* This is a lie, but we already lie to the caller new_symbol.
10996 new_symbol assumes we return the mangled name.
10997 This just undoes that lie until things are cleaned up. */
11001 /* Use DMGL_RET_DROP for C++ template functions to suppress
11002 their return type. It is easier for GDB users to search
11003 for such functions as `name(params)' than `long name(params)'.
11004 In such case the minimal symbol names do not match the full
11005 symbol names but for template functions there is never a need
11006 to look up their definition from their declaration so
11007 the only disadvantage remains the minimal symbol variant
11008 `long name(params)' does not have the proper inferior type. */
11009 demangled
.reset (gdb_demangle (mangled
,
11010 (DMGL_PARAMS
| DMGL_ANSI
11011 | DMGL_RET_DROP
)));
11014 canon
= demangled
.get ();
11022 if (canon
== NULL
|| check_physname
)
11024 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
11026 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
11028 /* It may not mean a bug in GDB. The compiler could also
11029 compute DW_AT_linkage_name incorrectly. But in such case
11030 GDB would need to be bug-to-bug compatible. */
11032 complaint (&symfile_complaints
,
11033 _("Computed physname <%s> does not match demangled <%s> "
11034 "(from linkage <%s>) - DIE at %s [in module %s]"),
11035 physname
, canon
, mangled
, sect_offset_str (die
->sect_off
),
11036 objfile_name (objfile
));
11038 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
11039 is available here - over computed PHYSNAME. It is safer
11040 against both buggy GDB and buggy compilers. */
11054 retval
= ((const char *)
11055 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
11056 retval
, strlen (retval
)));
11061 /* Inspect DIE in CU for a namespace alias. If one exists, record
11062 a new symbol for it.
11064 Returns 1 if a namespace alias was recorded, 0 otherwise. */
11067 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
11069 struct attribute
*attr
;
11071 /* If the die does not have a name, this is not a namespace
11073 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
11077 struct die_info
*d
= die
;
11078 struct dwarf2_cu
*imported_cu
= cu
;
11080 /* If the compiler has nested DW_AT_imported_declaration DIEs,
11081 keep inspecting DIEs until we hit the underlying import. */
11082 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
11083 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
11085 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
11089 d
= follow_die_ref (d
, attr
, &imported_cu
);
11090 if (d
->tag
!= DW_TAG_imported_declaration
)
11094 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
11096 complaint (&symfile_complaints
,
11097 _("DIE at %s has too many recursively imported "
11098 "declarations"), sect_offset_str (d
->sect_off
));
11105 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
11107 type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
11108 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
11110 /* This declaration is a global namespace alias. Add
11111 a symbol for it whose type is the aliased namespace. */
11112 new_symbol (die
, type
, cu
);
11121 /* Return the using directives repository (global or local?) to use in the
11122 current context for LANGUAGE.
11124 For Ada, imported declarations can materialize renamings, which *may* be
11125 global. However it is impossible (for now?) in DWARF to distinguish
11126 "external" imported declarations and "static" ones. As all imported
11127 declarations seem to be static in all other languages, make them all CU-wide
11128 global only in Ada. */
11130 static struct using_direct
**
11131 using_directives (enum language language
)
11133 if (language
== language_ada
&& context_stack_depth
== 0)
11134 return &global_using_directives
;
11136 return &local_using_directives
;
11139 /* Read the import statement specified by the given die and record it. */
11142 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
11144 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
11145 struct attribute
*import_attr
;
11146 struct die_info
*imported_die
, *child_die
;
11147 struct dwarf2_cu
*imported_cu
;
11148 const char *imported_name
;
11149 const char *imported_name_prefix
;
11150 const char *canonical_name
;
11151 const char *import_alias
;
11152 const char *imported_declaration
= NULL
;
11153 const char *import_prefix
;
11154 std::vector
<const char *> excludes
;
11156 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
11157 if (import_attr
== NULL
)
11159 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
11160 dwarf_tag_name (die
->tag
));
11165 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
11166 imported_name
= dwarf2_name (imported_die
, imported_cu
);
11167 if (imported_name
== NULL
)
11169 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
11171 The import in the following code:
11185 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
11186 <52> DW_AT_decl_file : 1
11187 <53> DW_AT_decl_line : 6
11188 <54> DW_AT_import : <0x75>
11189 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
11190 <59> DW_AT_name : B
11191 <5b> DW_AT_decl_file : 1
11192 <5c> DW_AT_decl_line : 2
11193 <5d> DW_AT_type : <0x6e>
11195 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
11196 <76> DW_AT_byte_size : 4
11197 <77> DW_AT_encoding : 5 (signed)
11199 imports the wrong die ( 0x75 instead of 0x58 ).
11200 This case will be ignored until the gcc bug is fixed. */
11204 /* Figure out the local name after import. */
11205 import_alias
= dwarf2_name (die
, cu
);
11207 /* Figure out where the statement is being imported to. */
11208 import_prefix
= determine_prefix (die
, cu
);
11210 /* Figure out what the scope of the imported die is and prepend it
11211 to the name of the imported die. */
11212 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
11214 if (imported_die
->tag
!= DW_TAG_namespace
11215 && imported_die
->tag
!= DW_TAG_module
)
11217 imported_declaration
= imported_name
;
11218 canonical_name
= imported_name_prefix
;
11220 else if (strlen (imported_name_prefix
) > 0)
11221 canonical_name
= obconcat (&objfile
->objfile_obstack
,
11222 imported_name_prefix
,
11223 (cu
->language
== language_d
? "." : "::"),
11224 imported_name
, (char *) NULL
);
11226 canonical_name
= imported_name
;
11228 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
11229 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
11230 child_die
= sibling_die (child_die
))
11232 /* DWARF-4: A Fortran use statement with a “rename list” may be
11233 represented by an imported module entry with an import attribute
11234 referring to the module and owned entries corresponding to those
11235 entities that are renamed as part of being imported. */
11237 if (child_die
->tag
!= DW_TAG_imported_declaration
)
11239 complaint (&symfile_complaints
,
11240 _("child DW_TAG_imported_declaration expected "
11241 "- DIE at %s [in module %s]"),
11242 sect_offset_str (child_die
->sect_off
),
11243 objfile_name (objfile
));
11247 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
11248 if (import_attr
== NULL
)
11250 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
11251 dwarf_tag_name (child_die
->tag
));
11256 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
11258 imported_name
= dwarf2_name (imported_die
, imported_cu
);
11259 if (imported_name
== NULL
)
11261 complaint (&symfile_complaints
,
11262 _("child DW_TAG_imported_declaration has unknown "
11263 "imported name - DIE at %s [in module %s]"),
11264 sect_offset_str (child_die
->sect_off
),
11265 objfile_name (objfile
));
11269 excludes
.push_back (imported_name
);
11271 process_die (child_die
, cu
);
11274 add_using_directive (using_directives (cu
->language
),
11278 imported_declaration
,
11281 &objfile
->objfile_obstack
);
11284 /* ICC<14 does not output the required DW_AT_declaration on incomplete
11285 types, but gives them a size of zero. Starting with version 14,
11286 ICC is compatible with GCC. */
11289 producer_is_icc_lt_14 (struct dwarf2_cu
*cu
)
11291 if (!cu
->checked_producer
)
11292 check_producer (cu
);
11294 return cu
->producer_is_icc_lt_14
;
11297 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
11298 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
11299 this, it was first present in GCC release 4.3.0. */
11302 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
11304 if (!cu
->checked_producer
)
11305 check_producer (cu
);
11307 return cu
->producer_is_gcc_lt_4_3
;
11310 static file_and_directory
11311 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
)
11313 file_and_directory res
;
11315 /* Find the filename. Do not use dwarf2_name here, since the filename
11316 is not a source language identifier. */
11317 res
.name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
11318 res
.comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
11320 if (res
.comp_dir
== NULL
11321 && producer_is_gcc_lt_4_3 (cu
) && res
.name
!= NULL
11322 && IS_ABSOLUTE_PATH (res
.name
))
11324 res
.comp_dir_storage
= ldirname (res
.name
);
11325 if (!res
.comp_dir_storage
.empty ())
11326 res
.comp_dir
= res
.comp_dir_storage
.c_str ();
11328 if (res
.comp_dir
!= NULL
)
11330 /* Irix 6.2 native cc prepends <machine>.: to the compilation
11331 directory, get rid of it. */
11332 const char *cp
= strchr (res
.comp_dir
, ':');
11334 if (cp
&& cp
!= res
.comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
11335 res
.comp_dir
= cp
+ 1;
11338 if (res
.name
== NULL
)
11339 res
.name
= "<unknown>";
11344 /* Handle DW_AT_stmt_list for a compilation unit.
11345 DIE is the DW_TAG_compile_unit die for CU.
11346 COMP_DIR is the compilation directory. LOWPC is passed to
11347 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
11350 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
11351 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
11353 struct dwarf2_per_objfile
*dwarf2_per_objfile
11354 = cu
->per_cu
->dwarf2_per_objfile
;
11355 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11356 struct attribute
*attr
;
11357 struct line_header line_header_local
;
11358 hashval_t line_header_local_hash
;
11360 int decode_mapping
;
11362 gdb_assert (! cu
->per_cu
->is_debug_types
);
11364 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
11368 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
11370 /* The line header hash table is only created if needed (it exists to
11371 prevent redundant reading of the line table for partial_units).
11372 If we're given a partial_unit, we'll need it. If we're given a
11373 compile_unit, then use the line header hash table if it's already
11374 created, but don't create one just yet. */
11376 if (dwarf2_per_objfile
->line_header_hash
== NULL
11377 && die
->tag
== DW_TAG_partial_unit
)
11379 dwarf2_per_objfile
->line_header_hash
11380 = htab_create_alloc_ex (127, line_header_hash_voidp
,
11381 line_header_eq_voidp
,
11382 free_line_header_voidp
,
11383 &objfile
->objfile_obstack
,
11384 hashtab_obstack_allocate
,
11385 dummy_obstack_deallocate
);
11388 line_header_local
.sect_off
= line_offset
;
11389 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
11390 line_header_local_hash
= line_header_hash (&line_header_local
);
11391 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
11393 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
11394 &line_header_local
,
11395 line_header_local_hash
, NO_INSERT
);
11397 /* For DW_TAG_compile_unit we need info like symtab::linetable which
11398 is not present in *SLOT (since if there is something in *SLOT then
11399 it will be for a partial_unit). */
11400 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
11402 gdb_assert (*slot
!= NULL
);
11403 cu
->line_header
= (struct line_header
*) *slot
;
11408 /* dwarf_decode_line_header does not yet provide sufficient information.
11409 We always have to call also dwarf_decode_lines for it. */
11410 line_header_up lh
= dwarf_decode_line_header (line_offset
, cu
);
11414 cu
->line_header
= lh
.release ();
11415 cu
->line_header_die_owner
= die
;
11417 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
11421 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
11422 &line_header_local
,
11423 line_header_local_hash
, INSERT
);
11424 gdb_assert (slot
!= NULL
);
11426 if (slot
!= NULL
&& *slot
== NULL
)
11428 /* This newly decoded line number information unit will be owned
11429 by line_header_hash hash table. */
11430 *slot
= cu
->line_header
;
11431 cu
->line_header_die_owner
= NULL
;
11435 /* We cannot free any current entry in (*slot) as that struct line_header
11436 may be already used by multiple CUs. Create only temporary decoded
11437 line_header for this CU - it may happen at most once for each line
11438 number information unit. And if we're not using line_header_hash
11439 then this is what we want as well. */
11440 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
11442 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
11443 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
11448 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
11451 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11453 struct dwarf2_per_objfile
*dwarf2_per_objfile
11454 = cu
->per_cu
->dwarf2_per_objfile
;
11455 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11456 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11457 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
11458 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
11459 struct attribute
*attr
;
11460 struct die_info
*child_die
;
11461 CORE_ADDR baseaddr
;
11463 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11465 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
11467 /* If we didn't find a lowpc, set it to highpc to avoid complaints
11468 from finish_block. */
11469 if (lowpc
== ((CORE_ADDR
) -1))
11471 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11473 file_and_directory fnd
= find_file_and_directory (die
, cu
);
11475 prepare_one_comp_unit (cu
, die
, cu
->language
);
11477 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
11478 standardised yet. As a workaround for the language detection we fall
11479 back to the DW_AT_producer string. */
11480 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
11481 cu
->language
= language_opencl
;
11483 /* Similar hack for Go. */
11484 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
11485 set_cu_language (DW_LANG_Go
, cu
);
11487 dwarf2_start_symtab (cu
, fnd
.name
, fnd
.comp_dir
, lowpc
);
11489 /* Decode line number information if present. We do this before
11490 processing child DIEs, so that the line header table is available
11491 for DW_AT_decl_file. */
11492 handle_DW_AT_stmt_list (die
, cu
, fnd
.comp_dir
, lowpc
);
11494 /* Process all dies in compilation unit. */
11495 if (die
->child
!= NULL
)
11497 child_die
= die
->child
;
11498 while (child_die
&& child_die
->tag
)
11500 process_die (child_die
, cu
);
11501 child_die
= sibling_die (child_die
);
11505 /* Decode macro information, if present. Dwarf 2 macro information
11506 refers to information in the line number info statement program
11507 header, so we can only read it if we've read the header
11509 attr
= dwarf2_attr (die
, DW_AT_macros
, cu
);
11511 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
11512 if (attr
&& cu
->line_header
)
11514 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
11515 complaint (&symfile_complaints
,
11516 _("CU refers to both DW_AT_macros and DW_AT_macro_info"));
11518 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
11522 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
11523 if (attr
&& cu
->line_header
)
11525 unsigned int macro_offset
= DW_UNSND (attr
);
11527 dwarf_decode_macros (cu
, macro_offset
, 0);
11532 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
11533 Create the set of symtabs used by this TU, or if this TU is sharing
11534 symtabs with another TU and the symtabs have already been created
11535 then restore those symtabs in the line header.
11536 We don't need the pc/line-number mapping for type units. */
11539 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
11541 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
11542 struct type_unit_group
*tu_group
;
11544 struct attribute
*attr
;
11546 struct signatured_type
*sig_type
;
11548 gdb_assert (per_cu
->is_debug_types
);
11549 sig_type
= (struct signatured_type
*) per_cu
;
11551 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
11553 /* If we're using .gdb_index (includes -readnow) then
11554 per_cu->type_unit_group may not have been set up yet. */
11555 if (sig_type
->type_unit_group
== NULL
)
11556 sig_type
->type_unit_group
= get_type_unit_group (cu
, attr
);
11557 tu_group
= sig_type
->type_unit_group
;
11559 /* If we've already processed this stmt_list there's no real need to
11560 do it again, we could fake it and just recreate the part we need
11561 (file name,index -> symtab mapping). If data shows this optimization
11562 is useful we can do it then. */
11563 first_time
= tu_group
->compunit_symtab
== NULL
;
11565 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
11570 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
11571 lh
= dwarf_decode_line_header (line_offset
, cu
);
11576 dwarf2_start_symtab (cu
, "", NULL
, 0);
11579 gdb_assert (tu_group
->symtabs
== NULL
);
11580 restart_symtab (tu_group
->compunit_symtab
, "", 0);
11585 cu
->line_header
= lh
.release ();
11586 cu
->line_header_die_owner
= die
;
11590 struct compunit_symtab
*cust
= dwarf2_start_symtab (cu
, "", NULL
, 0);
11592 /* Note: We don't assign tu_group->compunit_symtab yet because we're
11593 still initializing it, and our caller (a few levels up)
11594 process_full_type_unit still needs to know if this is the first
11597 tu_group
->num_symtabs
= cu
->line_header
->file_names
.size ();
11598 tu_group
->symtabs
= XNEWVEC (struct symtab
*,
11599 cu
->line_header
->file_names
.size ());
11601 for (i
= 0; i
< cu
->line_header
->file_names
.size (); ++i
)
11603 file_entry
&fe
= cu
->line_header
->file_names
[i
];
11605 dwarf2_start_subfile (fe
.name
, fe
.include_dir (cu
->line_header
));
11607 if (current_subfile
->symtab
== NULL
)
11609 /* NOTE: start_subfile will recognize when it's been
11610 passed a file it has already seen. So we can't
11611 assume there's a simple mapping from
11612 cu->line_header->file_names to subfiles, plus
11613 cu->line_header->file_names may contain dups. */
11614 current_subfile
->symtab
11615 = allocate_symtab (cust
, current_subfile
->name
);
11618 fe
.symtab
= current_subfile
->symtab
;
11619 tu_group
->symtabs
[i
] = fe
.symtab
;
11624 restart_symtab (tu_group
->compunit_symtab
, "", 0);
11626 for (i
= 0; i
< cu
->line_header
->file_names
.size (); ++i
)
11628 file_entry
&fe
= cu
->line_header
->file_names
[i
];
11630 fe
.symtab
= tu_group
->symtabs
[i
];
11634 /* The main symtab is allocated last. Type units don't have DW_AT_name
11635 so they don't have a "real" (so to speak) symtab anyway.
11636 There is later code that will assign the main symtab to all symbols
11637 that don't have one. We need to handle the case of a symbol with a
11638 missing symtab (DW_AT_decl_file) anyway. */
11641 /* Process DW_TAG_type_unit.
11642 For TUs we want to skip the first top level sibling if it's not the
11643 actual type being defined by this TU. In this case the first top
11644 level sibling is there to provide context only. */
11647 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11649 struct die_info
*child_die
;
11651 prepare_one_comp_unit (cu
, die
, language_minimal
);
11653 /* Initialize (or reinitialize) the machinery for building symtabs.
11654 We do this before processing child DIEs, so that the line header table
11655 is available for DW_AT_decl_file. */
11656 setup_type_unit_groups (die
, cu
);
11658 if (die
->child
!= NULL
)
11660 child_die
= die
->child
;
11661 while (child_die
&& child_die
->tag
)
11663 process_die (child_die
, cu
);
11664 child_die
= sibling_die (child_die
);
11671 http://gcc.gnu.org/wiki/DebugFission
11672 http://gcc.gnu.org/wiki/DebugFissionDWP
11674 To simplify handling of both DWO files ("object" files with the DWARF info)
11675 and DWP files (a file with the DWOs packaged up into one file), we treat
11676 DWP files as having a collection of virtual DWO files. */
11679 hash_dwo_file (const void *item
)
11681 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
11684 hash
= htab_hash_string (dwo_file
->dwo_name
);
11685 if (dwo_file
->comp_dir
!= NULL
)
11686 hash
+= htab_hash_string (dwo_file
->comp_dir
);
11691 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
11693 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
11694 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
11696 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
11698 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
11699 return lhs
->comp_dir
== rhs
->comp_dir
;
11700 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
11703 /* Allocate a hash table for DWO files. */
11706 allocate_dwo_file_hash_table (struct objfile
*objfile
)
11708 return htab_create_alloc_ex (41,
11712 &objfile
->objfile_obstack
,
11713 hashtab_obstack_allocate
,
11714 dummy_obstack_deallocate
);
11717 /* Lookup DWO file DWO_NAME. */
11720 lookup_dwo_file_slot (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11721 const char *dwo_name
,
11722 const char *comp_dir
)
11724 struct dwo_file find_entry
;
11727 if (dwarf2_per_objfile
->dwo_files
== NULL
)
11728 dwarf2_per_objfile
->dwo_files
11729 = allocate_dwo_file_hash_table (dwarf2_per_objfile
->objfile
);
11731 memset (&find_entry
, 0, sizeof (find_entry
));
11732 find_entry
.dwo_name
= dwo_name
;
11733 find_entry
.comp_dir
= comp_dir
;
11734 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
11740 hash_dwo_unit (const void *item
)
11742 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
11744 /* This drops the top 32 bits of the id, but is ok for a hash. */
11745 return dwo_unit
->signature
;
11749 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
11751 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
11752 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
11754 /* The signature is assumed to be unique within the DWO file.
11755 So while object file CU dwo_id's always have the value zero,
11756 that's OK, assuming each object file DWO file has only one CU,
11757 and that's the rule for now. */
11758 return lhs
->signature
== rhs
->signature
;
11761 /* Allocate a hash table for DWO CUs,TUs.
11762 There is one of these tables for each of CUs,TUs for each DWO file. */
11765 allocate_dwo_unit_table (struct objfile
*objfile
)
11767 /* Start out with a pretty small number.
11768 Generally DWO files contain only one CU and maybe some TUs. */
11769 return htab_create_alloc_ex (3,
11773 &objfile
->objfile_obstack
,
11774 hashtab_obstack_allocate
,
11775 dummy_obstack_deallocate
);
11778 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
11780 struct create_dwo_cu_data
11782 struct dwo_file
*dwo_file
;
11783 struct dwo_unit dwo_unit
;
11786 /* die_reader_func for create_dwo_cu. */
11789 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
11790 const gdb_byte
*info_ptr
,
11791 struct die_info
*comp_unit_die
,
11795 struct dwarf2_cu
*cu
= reader
->cu
;
11796 sect_offset sect_off
= cu
->per_cu
->sect_off
;
11797 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
11798 struct create_dwo_cu_data
*data
= (struct create_dwo_cu_data
*) datap
;
11799 struct dwo_file
*dwo_file
= data
->dwo_file
;
11800 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
11801 struct attribute
*attr
;
11803 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
11806 complaint (&symfile_complaints
,
11807 _("Dwarf Error: debug entry at offset %s is missing"
11808 " its dwo_id [in module %s]"),
11809 sect_offset_str (sect_off
), dwo_file
->dwo_name
);
11813 dwo_unit
->dwo_file
= dwo_file
;
11814 dwo_unit
->signature
= DW_UNSND (attr
);
11815 dwo_unit
->section
= section
;
11816 dwo_unit
->sect_off
= sect_off
;
11817 dwo_unit
->length
= cu
->per_cu
->length
;
11819 if (dwarf_read_debug
)
11820 fprintf_unfiltered (gdb_stdlog
, " offset %s, dwo_id %s\n",
11821 sect_offset_str (sect_off
),
11822 hex_string (dwo_unit
->signature
));
11825 /* Create the dwo_units for the CUs in a DWO_FILE.
11826 Note: This function processes DWO files only, not DWP files. */
11829 create_cus_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11830 struct dwo_file
&dwo_file
, dwarf2_section_info
§ion
,
11833 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11834 const gdb_byte
*info_ptr
, *end_ptr
;
11836 dwarf2_read_section (objfile
, §ion
);
11837 info_ptr
= section
.buffer
;
11839 if (info_ptr
== NULL
)
11842 if (dwarf_read_debug
)
11844 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
11845 get_section_name (§ion
),
11846 get_section_file_name (§ion
));
11849 end_ptr
= info_ptr
+ section
.size
;
11850 while (info_ptr
< end_ptr
)
11852 struct dwarf2_per_cu_data per_cu
;
11853 struct create_dwo_cu_data create_dwo_cu_data
;
11854 struct dwo_unit
*dwo_unit
;
11856 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
.buffer
);
11858 memset (&create_dwo_cu_data
.dwo_unit
, 0,
11859 sizeof (create_dwo_cu_data
.dwo_unit
));
11860 memset (&per_cu
, 0, sizeof (per_cu
));
11861 per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
11862 per_cu
.is_debug_types
= 0;
11863 per_cu
.sect_off
= sect_offset (info_ptr
- section
.buffer
);
11864 per_cu
.section
= §ion
;
11865 create_dwo_cu_data
.dwo_file
= &dwo_file
;
11867 init_cutu_and_read_dies_no_follow (
11868 &per_cu
, &dwo_file
, create_dwo_cu_reader
, &create_dwo_cu_data
);
11869 info_ptr
+= per_cu
.length
;
11871 // If the unit could not be parsed, skip it.
11872 if (create_dwo_cu_data
.dwo_unit
.dwo_file
== NULL
)
11875 if (cus_htab
== NULL
)
11876 cus_htab
= allocate_dwo_unit_table (objfile
);
11878 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
11879 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
11880 slot
= htab_find_slot (cus_htab
, dwo_unit
, INSERT
);
11881 gdb_assert (slot
!= NULL
);
11884 const struct dwo_unit
*dup_cu
= (const struct dwo_unit
*)*slot
;
11885 sect_offset dup_sect_off
= dup_cu
->sect_off
;
11887 complaint (&symfile_complaints
,
11888 _("debug cu entry at offset %s is duplicate to"
11889 " the entry at offset %s, signature %s"),
11890 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
11891 hex_string (dwo_unit
->signature
));
11893 *slot
= (void *)dwo_unit
;
11897 /* DWP file .debug_{cu,tu}_index section format:
11898 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
11902 Both index sections have the same format, and serve to map a 64-bit
11903 signature to a set of section numbers. Each section begins with a header,
11904 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
11905 indexes, and a pool of 32-bit section numbers. The index sections will be
11906 aligned at 8-byte boundaries in the file.
11908 The index section header consists of:
11910 V, 32 bit version number
11912 N, 32 bit number of compilation units or type units in the index
11913 M, 32 bit number of slots in the hash table
11915 Numbers are recorded using the byte order of the application binary.
11917 The hash table begins at offset 16 in the section, and consists of an array
11918 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
11919 order of the application binary). Unused slots in the hash table are 0.
11920 (We rely on the extreme unlikeliness of a signature being exactly 0.)
11922 The parallel table begins immediately after the hash table
11923 (at offset 16 + 8 * M from the beginning of the section), and consists of an
11924 array of 32-bit indexes (using the byte order of the application binary),
11925 corresponding 1-1 with slots in the hash table. Each entry in the parallel
11926 table contains a 32-bit index into the pool of section numbers. For unused
11927 hash table slots, the corresponding entry in the parallel table will be 0.
11929 The pool of section numbers begins immediately following the hash table
11930 (at offset 16 + 12 * M from the beginning of the section). The pool of
11931 section numbers consists of an array of 32-bit words (using the byte order
11932 of the application binary). Each item in the array is indexed starting
11933 from 0. The hash table entry provides the index of the first section
11934 number in the set. Additional section numbers in the set follow, and the
11935 set is terminated by a 0 entry (section number 0 is not used in ELF).
11937 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
11938 section must be the first entry in the set, and the .debug_abbrev.dwo must
11939 be the second entry. Other members of the set may follow in any order.
11945 DWP Version 2 combines all the .debug_info, etc. sections into one,
11946 and the entries in the index tables are now offsets into these sections.
11947 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
11950 Index Section Contents:
11952 Hash Table of Signatures dwp_hash_table.hash_table
11953 Parallel Table of Indices dwp_hash_table.unit_table
11954 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
11955 Table of Section Sizes dwp_hash_table.v2.sizes
11957 The index section header consists of:
11959 V, 32 bit version number
11960 L, 32 bit number of columns in the table of section offsets
11961 N, 32 bit number of compilation units or type units in the index
11962 M, 32 bit number of slots in the hash table
11964 Numbers are recorded using the byte order of the application binary.
11966 The hash table has the same format as version 1.
11967 The parallel table of indices has the same format as version 1,
11968 except that the entries are origin-1 indices into the table of sections
11969 offsets and the table of section sizes.
11971 The table of offsets begins immediately following the parallel table
11972 (at offset 16 + 12 * M from the beginning of the section). The table is
11973 a two-dimensional array of 32-bit words (using the byte order of the
11974 application binary), with L columns and N+1 rows, in row-major order.
11975 Each row in the array is indexed starting from 0. The first row provides
11976 a key to the remaining rows: each column in this row provides an identifier
11977 for a debug section, and the offsets in the same column of subsequent rows
11978 refer to that section. The section identifiers are:
11980 DW_SECT_INFO 1 .debug_info.dwo
11981 DW_SECT_TYPES 2 .debug_types.dwo
11982 DW_SECT_ABBREV 3 .debug_abbrev.dwo
11983 DW_SECT_LINE 4 .debug_line.dwo
11984 DW_SECT_LOC 5 .debug_loc.dwo
11985 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
11986 DW_SECT_MACINFO 7 .debug_macinfo.dwo
11987 DW_SECT_MACRO 8 .debug_macro.dwo
11989 The offsets provided by the CU and TU index sections are the base offsets
11990 for the contributions made by each CU or TU to the corresponding section
11991 in the package file. Each CU and TU header contains an abbrev_offset
11992 field, used to find the abbreviations table for that CU or TU within the
11993 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
11994 be interpreted as relative to the base offset given in the index section.
11995 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
11996 should be interpreted as relative to the base offset for .debug_line.dwo,
11997 and offsets into other debug sections obtained from DWARF attributes should
11998 also be interpreted as relative to the corresponding base offset.
12000 The table of sizes begins immediately following the table of offsets.
12001 Like the table of offsets, it is a two-dimensional array of 32-bit words,
12002 with L columns and N rows, in row-major order. Each row in the array is
12003 indexed starting from 1 (row 0 is shared by the two tables).
12007 Hash table lookup is handled the same in version 1 and 2:
12009 We assume that N and M will not exceed 2^32 - 1.
12010 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
12012 Given a 64-bit compilation unit signature or a type signature S, an entry
12013 in the hash table is located as follows:
12015 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
12016 the low-order k bits all set to 1.
12018 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
12020 3) If the hash table entry at index H matches the signature, use that
12021 entry. If the hash table entry at index H is unused (all zeroes),
12022 terminate the search: the signature is not present in the table.
12024 4) Let H = (H + H') modulo M. Repeat at Step 3.
12026 Because M > N and H' and M are relatively prime, the search is guaranteed
12027 to stop at an unused slot or find the match. */
12029 /* Create a hash table to map DWO IDs to their CU/TU entry in
12030 .debug_{info,types}.dwo in DWP_FILE.
12031 Returns NULL if there isn't one.
12032 Note: This function processes DWP files only, not DWO files. */
12034 static struct dwp_hash_table
*
12035 create_dwp_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12036 struct dwp_file
*dwp_file
, int is_debug_types
)
12038 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12039 bfd
*dbfd
= dwp_file
->dbfd
;
12040 const gdb_byte
*index_ptr
, *index_end
;
12041 struct dwarf2_section_info
*index
;
12042 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
12043 struct dwp_hash_table
*htab
;
12045 if (is_debug_types
)
12046 index
= &dwp_file
->sections
.tu_index
;
12048 index
= &dwp_file
->sections
.cu_index
;
12050 if (dwarf2_section_empty_p (index
))
12052 dwarf2_read_section (objfile
, index
);
12054 index_ptr
= index
->buffer
;
12055 index_end
= index_ptr
+ index
->size
;
12057 version
= read_4_bytes (dbfd
, index_ptr
);
12060 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
12064 nr_units
= read_4_bytes (dbfd
, index_ptr
);
12066 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
12069 if (version
!= 1 && version
!= 2)
12071 error (_("Dwarf Error: unsupported DWP file version (%s)"
12072 " [in module %s]"),
12073 pulongest (version
), dwp_file
->name
);
12075 if (nr_slots
!= (nr_slots
& -nr_slots
))
12077 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
12078 " is not power of 2 [in module %s]"),
12079 pulongest (nr_slots
), dwp_file
->name
);
12082 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
12083 htab
->version
= version
;
12084 htab
->nr_columns
= nr_columns
;
12085 htab
->nr_units
= nr_units
;
12086 htab
->nr_slots
= nr_slots
;
12087 htab
->hash_table
= index_ptr
;
12088 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
12090 /* Exit early if the table is empty. */
12091 if (nr_slots
== 0 || nr_units
== 0
12092 || (version
== 2 && nr_columns
== 0))
12094 /* All must be zero. */
12095 if (nr_slots
!= 0 || nr_units
!= 0
12096 || (version
== 2 && nr_columns
!= 0))
12098 complaint (&symfile_complaints
,
12099 _("Empty DWP but nr_slots,nr_units,nr_columns not"
12100 " all zero [in modules %s]"),
12108 htab
->section_pool
.v1
.indices
=
12109 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
12110 /* It's harder to decide whether the section is too small in v1.
12111 V1 is deprecated anyway so we punt. */
12115 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
12116 int *ids
= htab
->section_pool
.v2
.section_ids
;
12117 /* Reverse map for error checking. */
12118 int ids_seen
[DW_SECT_MAX
+ 1];
12121 if (nr_columns
< 2)
12123 error (_("Dwarf Error: bad DWP hash table, too few columns"
12124 " in section table [in module %s]"),
12127 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
12129 error (_("Dwarf Error: bad DWP hash table, too many columns"
12130 " in section table [in module %s]"),
12133 memset (ids
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
12134 memset (ids_seen
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
12135 for (i
= 0; i
< nr_columns
; ++i
)
12137 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
12139 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
12141 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
12142 " in section table [in module %s]"),
12143 id
, dwp_file
->name
);
12145 if (ids_seen
[id
] != -1)
12147 error (_("Dwarf Error: bad DWP hash table, duplicate section"
12148 " id %d in section table [in module %s]"),
12149 id
, dwp_file
->name
);
12154 /* Must have exactly one info or types section. */
12155 if (((ids_seen
[DW_SECT_INFO
] != -1)
12156 + (ids_seen
[DW_SECT_TYPES
] != -1))
12159 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
12160 " DWO info/types section [in module %s]"),
12163 /* Must have an abbrev section. */
12164 if (ids_seen
[DW_SECT_ABBREV
] == -1)
12166 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
12167 " section [in module %s]"),
12170 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
12171 htab
->section_pool
.v2
.sizes
=
12172 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
12173 * nr_units
* nr_columns
);
12174 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
12175 * nr_units
* nr_columns
))
12178 error (_("Dwarf Error: DWP index section is corrupt (too small)"
12179 " [in module %s]"),
12187 /* Update SECTIONS with the data from SECTP.
12189 This function is like the other "locate" section routines that are
12190 passed to bfd_map_over_sections, but in this context the sections to
12191 read comes from the DWP V1 hash table, not the full ELF section table.
12193 The result is non-zero for success, or zero if an error was found. */
12196 locate_v1_virtual_dwo_sections (asection
*sectp
,
12197 struct virtual_v1_dwo_sections
*sections
)
12199 const struct dwop_section_names
*names
= &dwop_section_names
;
12201 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12203 /* There can be only one. */
12204 if (sections
->abbrev
.s
.section
!= NULL
)
12206 sections
->abbrev
.s
.section
= sectp
;
12207 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
12209 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
12210 || section_is_p (sectp
->name
, &names
->types_dwo
))
12212 /* There can be only one. */
12213 if (sections
->info_or_types
.s
.section
!= NULL
)
12215 sections
->info_or_types
.s
.section
= sectp
;
12216 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
12218 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12220 /* There can be only one. */
12221 if (sections
->line
.s
.section
!= NULL
)
12223 sections
->line
.s
.section
= sectp
;
12224 sections
->line
.size
= bfd_get_section_size (sectp
);
12226 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12228 /* There can be only one. */
12229 if (sections
->loc
.s
.section
!= NULL
)
12231 sections
->loc
.s
.section
= sectp
;
12232 sections
->loc
.size
= bfd_get_section_size (sectp
);
12234 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12236 /* There can be only one. */
12237 if (sections
->macinfo
.s
.section
!= NULL
)
12239 sections
->macinfo
.s
.section
= sectp
;
12240 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
12242 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12244 /* There can be only one. */
12245 if (sections
->macro
.s
.section
!= NULL
)
12247 sections
->macro
.s
.section
= sectp
;
12248 sections
->macro
.size
= bfd_get_section_size (sectp
);
12250 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12252 /* There can be only one. */
12253 if (sections
->str_offsets
.s
.section
!= NULL
)
12255 sections
->str_offsets
.s
.section
= sectp
;
12256 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
12260 /* No other kind of section is valid. */
12267 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12268 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12269 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12270 This is for DWP version 1 files. */
12272 static struct dwo_unit
*
12273 create_dwo_unit_in_dwp_v1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12274 struct dwp_file
*dwp_file
,
12275 uint32_t unit_index
,
12276 const char *comp_dir
,
12277 ULONGEST signature
, int is_debug_types
)
12279 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12280 const struct dwp_hash_table
*dwp_htab
=
12281 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12282 bfd
*dbfd
= dwp_file
->dbfd
;
12283 const char *kind
= is_debug_types
? "TU" : "CU";
12284 struct dwo_file
*dwo_file
;
12285 struct dwo_unit
*dwo_unit
;
12286 struct virtual_v1_dwo_sections sections
;
12287 void **dwo_file_slot
;
12290 gdb_assert (dwp_file
->version
== 1);
12292 if (dwarf_read_debug
)
12294 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
12296 pulongest (unit_index
), hex_string (signature
),
12300 /* Fetch the sections of this DWO unit.
12301 Put a limit on the number of sections we look for so that bad data
12302 doesn't cause us to loop forever. */
12304 #define MAX_NR_V1_DWO_SECTIONS \
12305 (1 /* .debug_info or .debug_types */ \
12306 + 1 /* .debug_abbrev */ \
12307 + 1 /* .debug_line */ \
12308 + 1 /* .debug_loc */ \
12309 + 1 /* .debug_str_offsets */ \
12310 + 1 /* .debug_macro or .debug_macinfo */ \
12311 + 1 /* trailing zero */)
12313 memset (§ions
, 0, sizeof (sections
));
12315 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
12318 uint32_t section_nr
=
12319 read_4_bytes (dbfd
,
12320 dwp_htab
->section_pool
.v1
.indices
12321 + (unit_index
+ i
) * sizeof (uint32_t));
12323 if (section_nr
== 0)
12325 if (section_nr
>= dwp_file
->num_sections
)
12327 error (_("Dwarf Error: bad DWP hash table, section number too large"
12328 " [in module %s]"),
12332 sectp
= dwp_file
->elf_sections
[section_nr
];
12333 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
12335 error (_("Dwarf Error: bad DWP hash table, invalid section found"
12336 " [in module %s]"),
12342 || dwarf2_section_empty_p (§ions
.info_or_types
)
12343 || dwarf2_section_empty_p (§ions
.abbrev
))
12345 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
12346 " [in module %s]"),
12349 if (i
== MAX_NR_V1_DWO_SECTIONS
)
12351 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
12352 " [in module %s]"),
12356 /* It's easier for the rest of the code if we fake a struct dwo_file and
12357 have dwo_unit "live" in that. At least for now.
12359 The DWP file can be made up of a random collection of CUs and TUs.
12360 However, for each CU + set of TUs that came from the same original DWO
12361 file, we can combine them back into a virtual DWO file to save space
12362 (fewer struct dwo_file objects to allocate). Remember that for really
12363 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12365 std::string virtual_dwo_name
=
12366 string_printf ("virtual-dwo/%d-%d-%d-%d",
12367 get_section_id (§ions
.abbrev
),
12368 get_section_id (§ions
.line
),
12369 get_section_id (§ions
.loc
),
12370 get_section_id (§ions
.str_offsets
));
12371 /* Can we use an existing virtual DWO file? */
12372 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12373 virtual_dwo_name
.c_str (),
12375 /* Create one if necessary. */
12376 if (*dwo_file_slot
== NULL
)
12378 if (dwarf_read_debug
)
12380 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12381 virtual_dwo_name
.c_str ());
12383 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
12385 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
12386 virtual_dwo_name
.c_str (),
12387 virtual_dwo_name
.size ());
12388 dwo_file
->comp_dir
= comp_dir
;
12389 dwo_file
->sections
.abbrev
= sections
.abbrev
;
12390 dwo_file
->sections
.line
= sections
.line
;
12391 dwo_file
->sections
.loc
= sections
.loc
;
12392 dwo_file
->sections
.macinfo
= sections
.macinfo
;
12393 dwo_file
->sections
.macro
= sections
.macro
;
12394 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
12395 /* The "str" section is global to the entire DWP file. */
12396 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12397 /* The info or types section is assigned below to dwo_unit,
12398 there's no need to record it in dwo_file.
12399 Also, we can't simply record type sections in dwo_file because
12400 we record a pointer into the vector in dwo_unit. As we collect more
12401 types we'll grow the vector and eventually have to reallocate space
12402 for it, invalidating all copies of pointers into the previous
12404 *dwo_file_slot
= dwo_file
;
12408 if (dwarf_read_debug
)
12410 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12411 virtual_dwo_name
.c_str ());
12413 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12416 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12417 dwo_unit
->dwo_file
= dwo_file
;
12418 dwo_unit
->signature
= signature
;
12419 dwo_unit
->section
=
12420 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
12421 *dwo_unit
->section
= sections
.info_or_types
;
12422 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12427 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
12428 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
12429 piece within that section used by a TU/CU, return a virtual section
12430 of just that piece. */
12432 static struct dwarf2_section_info
12433 create_dwp_v2_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12434 struct dwarf2_section_info
*section
,
12435 bfd_size_type offset
, bfd_size_type size
)
12437 struct dwarf2_section_info result
;
12440 gdb_assert (section
!= NULL
);
12441 gdb_assert (!section
->is_virtual
);
12443 memset (&result
, 0, sizeof (result
));
12444 result
.s
.containing_section
= section
;
12445 result
.is_virtual
= 1;
12450 sectp
= get_section_bfd_section (section
);
12452 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
12453 bounds of the real section. This is a pretty-rare event, so just
12454 flag an error (easier) instead of a warning and trying to cope. */
12456 || offset
+ size
> bfd_get_section_size (sectp
))
12458 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
12459 " in section %s [in module %s]"),
12460 sectp
? bfd_section_name (abfd
, sectp
) : "<unknown>",
12461 objfile_name (dwarf2_per_objfile
->objfile
));
12464 result
.virtual_offset
= offset
;
12465 result
.size
= size
;
12469 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12470 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12471 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12472 This is for DWP version 2 files. */
12474 static struct dwo_unit
*
12475 create_dwo_unit_in_dwp_v2 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12476 struct dwp_file
*dwp_file
,
12477 uint32_t unit_index
,
12478 const char *comp_dir
,
12479 ULONGEST signature
, int is_debug_types
)
12481 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12482 const struct dwp_hash_table
*dwp_htab
=
12483 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12484 bfd
*dbfd
= dwp_file
->dbfd
;
12485 const char *kind
= is_debug_types
? "TU" : "CU";
12486 struct dwo_file
*dwo_file
;
12487 struct dwo_unit
*dwo_unit
;
12488 struct virtual_v2_dwo_sections sections
;
12489 void **dwo_file_slot
;
12492 gdb_assert (dwp_file
->version
== 2);
12494 if (dwarf_read_debug
)
12496 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
12498 pulongest (unit_index
), hex_string (signature
),
12502 /* Fetch the section offsets of this DWO unit. */
12504 memset (§ions
, 0, sizeof (sections
));
12506 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
12508 uint32_t offset
= read_4_bytes (dbfd
,
12509 dwp_htab
->section_pool
.v2
.offsets
12510 + (((unit_index
- 1) * dwp_htab
->nr_columns
12512 * sizeof (uint32_t)));
12513 uint32_t size
= read_4_bytes (dbfd
,
12514 dwp_htab
->section_pool
.v2
.sizes
12515 + (((unit_index
- 1) * dwp_htab
->nr_columns
12517 * sizeof (uint32_t)));
12519 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
12522 case DW_SECT_TYPES
:
12523 sections
.info_or_types_offset
= offset
;
12524 sections
.info_or_types_size
= size
;
12526 case DW_SECT_ABBREV
:
12527 sections
.abbrev_offset
= offset
;
12528 sections
.abbrev_size
= size
;
12531 sections
.line_offset
= offset
;
12532 sections
.line_size
= size
;
12535 sections
.loc_offset
= offset
;
12536 sections
.loc_size
= size
;
12538 case DW_SECT_STR_OFFSETS
:
12539 sections
.str_offsets_offset
= offset
;
12540 sections
.str_offsets_size
= size
;
12542 case DW_SECT_MACINFO
:
12543 sections
.macinfo_offset
= offset
;
12544 sections
.macinfo_size
= size
;
12546 case DW_SECT_MACRO
:
12547 sections
.macro_offset
= offset
;
12548 sections
.macro_size
= size
;
12553 /* It's easier for the rest of the code if we fake a struct dwo_file and
12554 have dwo_unit "live" in that. At least for now.
12556 The DWP file can be made up of a random collection of CUs and TUs.
12557 However, for each CU + set of TUs that came from the same original DWO
12558 file, we can combine them back into a virtual DWO file to save space
12559 (fewer struct dwo_file objects to allocate). Remember that for really
12560 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12562 std::string virtual_dwo_name
=
12563 string_printf ("virtual-dwo/%ld-%ld-%ld-%ld",
12564 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
12565 (long) (sections
.line_size
? sections
.line_offset
: 0),
12566 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
12567 (long) (sections
.str_offsets_size
12568 ? sections
.str_offsets_offset
: 0));
12569 /* Can we use an existing virtual DWO file? */
12570 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12571 virtual_dwo_name
.c_str (),
12573 /* Create one if necessary. */
12574 if (*dwo_file_slot
== NULL
)
12576 if (dwarf_read_debug
)
12578 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12579 virtual_dwo_name
.c_str ());
12581 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
12583 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
12584 virtual_dwo_name
.c_str (),
12585 virtual_dwo_name
.size ());
12586 dwo_file
->comp_dir
= comp_dir
;
12587 dwo_file
->sections
.abbrev
=
12588 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.abbrev
,
12589 sections
.abbrev_offset
, sections
.abbrev_size
);
12590 dwo_file
->sections
.line
=
12591 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.line
,
12592 sections
.line_offset
, sections
.line_size
);
12593 dwo_file
->sections
.loc
=
12594 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.loc
,
12595 sections
.loc_offset
, sections
.loc_size
);
12596 dwo_file
->sections
.macinfo
=
12597 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macinfo
,
12598 sections
.macinfo_offset
, sections
.macinfo_size
);
12599 dwo_file
->sections
.macro
=
12600 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macro
,
12601 sections
.macro_offset
, sections
.macro_size
);
12602 dwo_file
->sections
.str_offsets
=
12603 create_dwp_v2_section (dwarf2_per_objfile
,
12604 &dwp_file
->sections
.str_offsets
,
12605 sections
.str_offsets_offset
,
12606 sections
.str_offsets_size
);
12607 /* The "str" section is global to the entire DWP file. */
12608 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12609 /* The info or types section is assigned below to dwo_unit,
12610 there's no need to record it in dwo_file.
12611 Also, we can't simply record type sections in dwo_file because
12612 we record a pointer into the vector in dwo_unit. As we collect more
12613 types we'll grow the vector and eventually have to reallocate space
12614 for it, invalidating all copies of pointers into the previous
12616 *dwo_file_slot
= dwo_file
;
12620 if (dwarf_read_debug
)
12622 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12623 virtual_dwo_name
.c_str ());
12625 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12628 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12629 dwo_unit
->dwo_file
= dwo_file
;
12630 dwo_unit
->signature
= signature
;
12631 dwo_unit
->section
=
12632 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
12633 *dwo_unit
->section
= create_dwp_v2_section (dwarf2_per_objfile
,
12635 ? &dwp_file
->sections
.types
12636 : &dwp_file
->sections
.info
,
12637 sections
.info_or_types_offset
,
12638 sections
.info_or_types_size
);
12639 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12644 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
12645 Returns NULL if the signature isn't found. */
12647 static struct dwo_unit
*
12648 lookup_dwo_unit_in_dwp (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12649 struct dwp_file
*dwp_file
, const char *comp_dir
,
12650 ULONGEST signature
, int is_debug_types
)
12652 const struct dwp_hash_table
*dwp_htab
=
12653 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12654 bfd
*dbfd
= dwp_file
->dbfd
;
12655 uint32_t mask
= dwp_htab
->nr_slots
- 1;
12656 uint32_t hash
= signature
& mask
;
12657 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
12660 struct dwo_unit find_dwo_cu
;
12662 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
12663 find_dwo_cu
.signature
= signature
;
12664 slot
= htab_find_slot (is_debug_types
12665 ? dwp_file
->loaded_tus
12666 : dwp_file
->loaded_cus
,
12667 &find_dwo_cu
, INSERT
);
12670 return (struct dwo_unit
*) *slot
;
12672 /* Use a for loop so that we don't loop forever on bad debug info. */
12673 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
12675 ULONGEST signature_in_table
;
12677 signature_in_table
=
12678 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
12679 if (signature_in_table
== signature
)
12681 uint32_t unit_index
=
12682 read_4_bytes (dbfd
,
12683 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
12685 if (dwp_file
->version
== 1)
12687 *slot
= create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile
,
12688 dwp_file
, unit_index
,
12689 comp_dir
, signature
,
12694 *slot
= create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile
,
12695 dwp_file
, unit_index
,
12696 comp_dir
, signature
,
12699 return (struct dwo_unit
*) *slot
;
12701 if (signature_in_table
== 0)
12703 hash
= (hash
+ hash2
) & mask
;
12706 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
12707 " [in module %s]"),
12711 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
12712 Open the file specified by FILE_NAME and hand it off to BFD for
12713 preliminary analysis. Return a newly initialized bfd *, which
12714 includes a canonicalized copy of FILE_NAME.
12715 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
12716 SEARCH_CWD is true if the current directory is to be searched.
12717 It will be searched before debug-file-directory.
12718 If successful, the file is added to the bfd include table of the
12719 objfile's bfd (see gdb_bfd_record_inclusion).
12720 If unable to find/open the file, return NULL.
12721 NOTE: This function is derived from symfile_bfd_open. */
12723 static gdb_bfd_ref_ptr
12724 try_open_dwop_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12725 const char *file_name
, int is_dwp
, int search_cwd
)
12728 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
12729 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
12730 to debug_file_directory. */
12731 const char *search_path
;
12732 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
12734 gdb::unique_xmalloc_ptr
<char> search_path_holder
;
12737 if (*debug_file_directory
!= '\0')
12739 search_path_holder
.reset (concat (".", dirname_separator_string
,
12740 debug_file_directory
,
12742 search_path
= search_path_holder
.get ();
12748 search_path
= debug_file_directory
;
12750 openp_flags flags
= OPF_RETURN_REALPATH
;
12752 flags
|= OPF_SEARCH_IN_PATH
;
12754 gdb::unique_xmalloc_ptr
<char> absolute_name
;
12755 desc
= openp (search_path
, flags
, file_name
,
12756 O_RDONLY
| O_BINARY
, &absolute_name
);
12760 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (absolute_name
.get (),
12762 if (sym_bfd
== NULL
)
12764 bfd_set_cacheable (sym_bfd
.get (), 1);
12766 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
12769 /* Success. Record the bfd as having been included by the objfile's bfd.
12770 This is important because things like demangled_names_hash lives in the
12771 objfile's per_bfd space and may have references to things like symbol
12772 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
12773 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
.get ());
12778 /* Try to open DWO file FILE_NAME.
12779 COMP_DIR is the DW_AT_comp_dir attribute.
12780 The result is the bfd handle of the file.
12781 If there is a problem finding or opening the file, return NULL.
12782 Upon success, the canonicalized path of the file is stored in the bfd,
12783 same as symfile_bfd_open. */
12785 static gdb_bfd_ref_ptr
12786 open_dwo_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12787 const char *file_name
, const char *comp_dir
)
12789 if (IS_ABSOLUTE_PATH (file_name
))
12790 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12791 0 /*is_dwp*/, 0 /*search_cwd*/);
12793 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
12795 if (comp_dir
!= NULL
)
12797 char *path_to_try
= concat (comp_dir
, SLASH_STRING
,
12798 file_name
, (char *) NULL
);
12800 /* NOTE: If comp_dir is a relative path, this will also try the
12801 search path, which seems useful. */
12802 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
,
12805 1 /*search_cwd*/));
12806 xfree (path_to_try
);
12811 /* That didn't work, try debug-file-directory, which, despite its name,
12812 is a list of paths. */
12814 if (*debug_file_directory
== '\0')
12817 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12818 0 /*is_dwp*/, 1 /*search_cwd*/);
12821 /* This function is mapped across the sections and remembers the offset and
12822 size of each of the DWO debugging sections we are interested in. */
12825 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
12827 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
12828 const struct dwop_section_names
*names
= &dwop_section_names
;
12830 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12832 dwo_sections
->abbrev
.s
.section
= sectp
;
12833 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
12835 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12837 dwo_sections
->info
.s
.section
= sectp
;
12838 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
12840 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12842 dwo_sections
->line
.s
.section
= sectp
;
12843 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
12845 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12847 dwo_sections
->loc
.s
.section
= sectp
;
12848 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
12850 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12852 dwo_sections
->macinfo
.s
.section
= sectp
;
12853 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
12855 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12857 dwo_sections
->macro
.s
.section
= sectp
;
12858 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
12860 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
12862 dwo_sections
->str
.s
.section
= sectp
;
12863 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
12865 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12867 dwo_sections
->str_offsets
.s
.section
= sectp
;
12868 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
12870 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12872 struct dwarf2_section_info type_section
;
12874 memset (&type_section
, 0, sizeof (type_section
));
12875 type_section
.s
.section
= sectp
;
12876 type_section
.size
= bfd_get_section_size (sectp
);
12877 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
12882 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
12883 by PER_CU. This is for the non-DWP case.
12884 The result is NULL if DWO_NAME can't be found. */
12886 static struct dwo_file
*
12887 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
12888 const char *dwo_name
, const char *comp_dir
)
12890 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
12891 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12893 gdb_bfd_ref_ptr
dbfd (open_dwo_file (dwarf2_per_objfile
, dwo_name
, comp_dir
));
12896 if (dwarf_read_debug
)
12897 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
12901 /* We use a unique pointer here, despite the obstack allocation,
12902 because a dwo_file needs some cleanup if it is abandoned. */
12903 dwo_file_up
dwo_file (OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
12905 dwo_file
->dwo_name
= dwo_name
;
12906 dwo_file
->comp_dir
= comp_dir
;
12907 dwo_file
->dbfd
= dbfd
.release ();
12909 bfd_map_over_sections (dwo_file
->dbfd
, dwarf2_locate_dwo_sections
,
12910 &dwo_file
->sections
);
12912 create_cus_hash_table (dwarf2_per_objfile
, *dwo_file
, dwo_file
->sections
.info
,
12915 create_debug_types_hash_table (dwarf2_per_objfile
, dwo_file
.get (),
12916 dwo_file
->sections
.types
, dwo_file
->tus
);
12918 if (dwarf_read_debug
)
12919 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
12921 return dwo_file
.release ();
12924 /* This function is mapped across the sections and remembers the offset and
12925 size of each of the DWP debugging sections common to version 1 and 2 that
12926 we are interested in. */
12929 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
12930 void *dwp_file_ptr
)
12932 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12933 const struct dwop_section_names
*names
= &dwop_section_names
;
12934 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12936 /* Record the ELF section number for later lookup: this is what the
12937 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12938 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12939 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12941 /* Look for specific sections that we need. */
12942 if (section_is_p (sectp
->name
, &names
->str_dwo
))
12944 dwp_file
->sections
.str
.s
.section
= sectp
;
12945 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
12947 else if (section_is_p (sectp
->name
, &names
->cu_index
))
12949 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
12950 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
12952 else if (section_is_p (sectp
->name
, &names
->tu_index
))
12954 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
12955 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
12959 /* This function is mapped across the sections and remembers the offset and
12960 size of each of the DWP version 2 debugging sections that we are interested
12961 in. This is split into a separate function because we don't know if we
12962 have version 1 or 2 until we parse the cu_index/tu_index sections. */
12965 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
12967 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12968 const struct dwop_section_names
*names
= &dwop_section_names
;
12969 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12971 /* Record the ELF section number for later lookup: this is what the
12972 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12973 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12974 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12976 /* Look for specific sections that we need. */
12977 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12979 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
12980 dwp_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
12982 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12984 dwp_file
->sections
.info
.s
.section
= sectp
;
12985 dwp_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
12987 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12989 dwp_file
->sections
.line
.s
.section
= sectp
;
12990 dwp_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
12992 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12994 dwp_file
->sections
.loc
.s
.section
= sectp
;
12995 dwp_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
12997 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12999 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
13000 dwp_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
13002 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
13004 dwp_file
->sections
.macro
.s
.section
= sectp
;
13005 dwp_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
13007 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
13009 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
13010 dwp_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
13012 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
13014 dwp_file
->sections
.types
.s
.section
= sectp
;
13015 dwp_file
->sections
.types
.size
= bfd_get_section_size (sectp
);
13019 /* Hash function for dwp_file loaded CUs/TUs. */
13022 hash_dwp_loaded_cutus (const void *item
)
13024 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
13026 /* This drops the top 32 bits of the signature, but is ok for a hash. */
13027 return dwo_unit
->signature
;
13030 /* Equality function for dwp_file loaded CUs/TUs. */
13033 eq_dwp_loaded_cutus (const void *a
, const void *b
)
13035 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
13036 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
13038 return dua
->signature
== dub
->signature
;
13041 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
13044 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
13046 return htab_create_alloc_ex (3,
13047 hash_dwp_loaded_cutus
,
13048 eq_dwp_loaded_cutus
,
13050 &objfile
->objfile_obstack
,
13051 hashtab_obstack_allocate
,
13052 dummy_obstack_deallocate
);
13055 /* Try to open DWP file FILE_NAME.
13056 The result is the bfd handle of the file.
13057 If there is a problem finding or opening the file, return NULL.
13058 Upon success, the canonicalized path of the file is stored in the bfd,
13059 same as symfile_bfd_open. */
13061 static gdb_bfd_ref_ptr
13062 open_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
13063 const char *file_name
)
13065 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
, file_name
,
13067 1 /*search_cwd*/));
13071 /* Work around upstream bug 15652.
13072 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
13073 [Whether that's a "bug" is debatable, but it is getting in our way.]
13074 We have no real idea where the dwp file is, because gdb's realpath-ing
13075 of the executable's path may have discarded the needed info.
13076 [IWBN if the dwp file name was recorded in the executable, akin to
13077 .gnu_debuglink, but that doesn't exist yet.]
13078 Strip the directory from FILE_NAME and search again. */
13079 if (*debug_file_directory
!= '\0')
13081 /* Don't implicitly search the current directory here.
13082 If the user wants to search "." to handle this case,
13083 it must be added to debug-file-directory. */
13084 return try_open_dwop_file (dwarf2_per_objfile
,
13085 lbasename (file_name
), 1 /*is_dwp*/,
13092 /* Initialize the use of the DWP file for the current objfile.
13093 By convention the name of the DWP file is ${objfile}.dwp.
13094 The result is NULL if it can't be found. */
13096 static struct dwp_file
*
13097 open_and_init_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
13099 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13100 struct dwp_file
*dwp_file
;
13102 /* Try to find first .dwp for the binary file before any symbolic links
13105 /* If the objfile is a debug file, find the name of the real binary
13106 file and get the name of dwp file from there. */
13107 std::string dwp_name
;
13108 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
13110 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
13111 const char *backlink_basename
= lbasename (backlink
->original_name
);
13113 dwp_name
= ldirname (objfile
->original_name
) + SLASH_STRING
+ backlink_basename
;
13116 dwp_name
= objfile
->original_name
;
13118 dwp_name
+= ".dwp";
13120 gdb_bfd_ref_ptr
dbfd (open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ()));
13122 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
13124 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
13125 dwp_name
= objfile_name (objfile
);
13126 dwp_name
+= ".dwp";
13127 dbfd
= open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ());
13132 if (dwarf_read_debug
)
13133 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
.c_str ());
13136 dwp_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_file
);
13137 dwp_file
->name
= bfd_get_filename (dbfd
.get ());
13138 dwp_file
->dbfd
= dbfd
.release ();
13140 /* +1: section 0 is unused */
13141 dwp_file
->num_sections
= bfd_count_sections (dwp_file
->dbfd
) + 1;
13142 dwp_file
->elf_sections
=
13143 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
13144 dwp_file
->num_sections
, asection
*);
13146 bfd_map_over_sections (dwp_file
->dbfd
, dwarf2_locate_common_dwp_sections
,
13149 dwp_file
->cus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
, 0);
13151 dwp_file
->tus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
, 1);
13153 /* The DWP file version is stored in the hash table. Oh well. */
13154 if (dwp_file
->cus
&& dwp_file
->tus
13155 && dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
13157 /* Technically speaking, we should try to limp along, but this is
13158 pretty bizarre. We use pulongest here because that's the established
13159 portability solution (e.g, we cannot use %u for uint32_t). */
13160 error (_("Dwarf Error: DWP file CU version %s doesn't match"
13161 " TU version %s [in DWP file %s]"),
13162 pulongest (dwp_file
->cus
->version
),
13163 pulongest (dwp_file
->tus
->version
), dwp_name
.c_str ());
13167 dwp_file
->version
= dwp_file
->cus
->version
;
13168 else if (dwp_file
->tus
)
13169 dwp_file
->version
= dwp_file
->tus
->version
;
13171 dwp_file
->version
= 2;
13173 if (dwp_file
->version
== 2)
13174 bfd_map_over_sections (dwp_file
->dbfd
, dwarf2_locate_v2_dwp_sections
,
13177 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
13178 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
13180 if (dwarf_read_debug
)
13182 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
13183 fprintf_unfiltered (gdb_stdlog
,
13184 " %s CUs, %s TUs\n",
13185 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
13186 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
13192 /* Wrapper around open_and_init_dwp_file, only open it once. */
13194 static struct dwp_file
*
13195 get_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
13197 if (! dwarf2_per_objfile
->dwp_checked
)
13199 dwarf2_per_objfile
->dwp_file
13200 = open_and_init_dwp_file (dwarf2_per_objfile
);
13201 dwarf2_per_objfile
->dwp_checked
= 1;
13203 return dwarf2_per_objfile
->dwp_file
;
13206 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
13207 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
13208 or in the DWP file for the objfile, referenced by THIS_UNIT.
13209 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
13210 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
13212 This is called, for example, when wanting to read a variable with a
13213 complex location. Therefore we don't want to do file i/o for every call.
13214 Therefore we don't want to look for a DWO file on every call.
13215 Therefore we first see if we've already seen SIGNATURE in a DWP file,
13216 then we check if we've already seen DWO_NAME, and only THEN do we check
13219 The result is a pointer to the dwo_unit object or NULL if we didn't find it
13220 (dwo_id mismatch or couldn't find the DWO/DWP file). */
13222 static struct dwo_unit
*
13223 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
13224 const char *dwo_name
, const char *comp_dir
,
13225 ULONGEST signature
, int is_debug_types
)
13227 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_unit
->dwarf2_per_objfile
;
13228 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13229 const char *kind
= is_debug_types
? "TU" : "CU";
13230 void **dwo_file_slot
;
13231 struct dwo_file
*dwo_file
;
13232 struct dwp_file
*dwp_file
;
13234 /* First see if there's a DWP file.
13235 If we have a DWP file but didn't find the DWO inside it, don't
13236 look for the original DWO file. It makes gdb behave differently
13237 depending on whether one is debugging in the build tree. */
13239 dwp_file
= get_dwp_file (dwarf2_per_objfile
);
13240 if (dwp_file
!= NULL
)
13242 const struct dwp_hash_table
*dwp_htab
=
13243 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
13245 if (dwp_htab
!= NULL
)
13247 struct dwo_unit
*dwo_cutu
=
13248 lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, comp_dir
,
13249 signature
, is_debug_types
);
13251 if (dwo_cutu
!= NULL
)
13253 if (dwarf_read_debug
)
13255 fprintf_unfiltered (gdb_stdlog
,
13256 "Virtual DWO %s %s found: @%s\n",
13257 kind
, hex_string (signature
),
13258 host_address_to_string (dwo_cutu
));
13266 /* No DWP file, look for the DWO file. */
13268 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
13269 dwo_name
, comp_dir
);
13270 if (*dwo_file_slot
== NULL
)
13272 /* Read in the file and build a table of the CUs/TUs it contains. */
13273 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
13275 /* NOTE: This will be NULL if unable to open the file. */
13276 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
13278 if (dwo_file
!= NULL
)
13280 struct dwo_unit
*dwo_cutu
= NULL
;
13282 if (is_debug_types
&& dwo_file
->tus
)
13284 struct dwo_unit find_dwo_cutu
;
13286 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
13287 find_dwo_cutu
.signature
= signature
;
13289 = (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_cutu
);
13291 else if (!is_debug_types
&& dwo_file
->cus
)
13293 struct dwo_unit find_dwo_cutu
;
13295 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
13296 find_dwo_cutu
.signature
= signature
;
13297 dwo_cutu
= (struct dwo_unit
*)htab_find (dwo_file
->cus
,
13301 if (dwo_cutu
!= NULL
)
13303 if (dwarf_read_debug
)
13305 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
13306 kind
, dwo_name
, hex_string (signature
),
13307 host_address_to_string (dwo_cutu
));
13314 /* We didn't find it. This could mean a dwo_id mismatch, or
13315 someone deleted the DWO/DWP file, or the search path isn't set up
13316 correctly to find the file. */
13318 if (dwarf_read_debug
)
13320 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
13321 kind
, dwo_name
, hex_string (signature
));
13324 /* This is a warning and not a complaint because it can be caused by
13325 pilot error (e.g., user accidentally deleting the DWO). */
13327 /* Print the name of the DWP file if we looked there, helps the user
13328 better diagnose the problem. */
13329 std::string dwp_text
;
13331 if (dwp_file
!= NULL
)
13332 dwp_text
= string_printf (" [in DWP file %s]",
13333 lbasename (dwp_file
->name
));
13335 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset %s"
13336 " [in module %s]"),
13337 kind
, dwo_name
, hex_string (signature
),
13339 this_unit
->is_debug_types
? "TU" : "CU",
13340 sect_offset_str (this_unit
->sect_off
), objfile_name (objfile
));
13345 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
13346 See lookup_dwo_cutu_unit for details. */
13348 static struct dwo_unit
*
13349 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
13350 const char *dwo_name
, const char *comp_dir
,
13351 ULONGEST signature
)
13353 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
13356 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
13357 See lookup_dwo_cutu_unit for details. */
13359 static struct dwo_unit
*
13360 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
13361 const char *dwo_name
, const char *comp_dir
)
13363 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
13366 /* Traversal function for queue_and_load_all_dwo_tus. */
13369 queue_and_load_dwo_tu (void **slot
, void *info
)
13371 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
13372 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
13373 ULONGEST signature
= dwo_unit
->signature
;
13374 struct signatured_type
*sig_type
=
13375 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
13377 if (sig_type
!= NULL
)
13379 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
13381 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
13382 a real dependency of PER_CU on SIG_TYPE. That is detected later
13383 while processing PER_CU. */
13384 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
13385 load_full_type_unit (sig_cu
);
13386 VEC_safe_push (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, sig_cu
);
13392 /* Queue all TUs contained in the DWO of PER_CU to be read in.
13393 The DWO may have the only definition of the type, though it may not be
13394 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
13395 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
13398 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
13400 struct dwo_unit
*dwo_unit
;
13401 struct dwo_file
*dwo_file
;
13403 gdb_assert (!per_cu
->is_debug_types
);
13404 gdb_assert (get_dwp_file (per_cu
->dwarf2_per_objfile
) == NULL
);
13405 gdb_assert (per_cu
->cu
!= NULL
);
13407 dwo_unit
= per_cu
->cu
->dwo_unit
;
13408 gdb_assert (dwo_unit
!= NULL
);
13410 dwo_file
= dwo_unit
->dwo_file
;
13411 if (dwo_file
->tus
!= NULL
)
13412 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
13415 /* Free all resources associated with DWO_FILE.
13416 Close the DWO file and munmap the sections. */
13419 free_dwo_file (struct dwo_file
*dwo_file
)
13421 /* Note: dbfd is NULL for virtual DWO files. */
13422 gdb_bfd_unref (dwo_file
->dbfd
);
13424 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
13427 /* Traversal function for free_dwo_files. */
13430 free_dwo_file_from_slot (void **slot
, void *info
)
13432 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
13434 free_dwo_file (dwo_file
);
13439 /* Free all resources associated with DWO_FILES. */
13442 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
13444 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
13447 /* Read in various DIEs. */
13449 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
13450 Inherit only the children of the DW_AT_abstract_origin DIE not being
13451 already referenced by DW_AT_abstract_origin from the children of the
13455 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
13457 struct die_info
*child_die
;
13458 sect_offset
*offsetp
;
13459 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
13460 struct die_info
*origin_die
;
13461 /* Iterator of the ORIGIN_DIE children. */
13462 struct die_info
*origin_child_die
;
13463 struct attribute
*attr
;
13464 struct dwarf2_cu
*origin_cu
;
13465 struct pending
**origin_previous_list_in_scope
;
13467 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13471 /* Note that following die references may follow to a die in a
13475 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
13477 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
13479 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
13480 origin_cu
->list_in_scope
= cu
->list_in_scope
;
13482 if (die
->tag
!= origin_die
->tag
13483 && !(die
->tag
== DW_TAG_inlined_subroutine
13484 && origin_die
->tag
== DW_TAG_subprogram
))
13485 complaint (&symfile_complaints
,
13486 _("DIE %s and its abstract origin %s have different tags"),
13487 sect_offset_str (die
->sect_off
),
13488 sect_offset_str (origin_die
->sect_off
));
13490 std::vector
<sect_offset
> offsets
;
13492 for (child_die
= die
->child
;
13493 child_die
&& child_die
->tag
;
13494 child_die
= sibling_die (child_die
))
13496 struct die_info
*child_origin_die
;
13497 struct dwarf2_cu
*child_origin_cu
;
13499 /* We are trying to process concrete instance entries:
13500 DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
13501 it's not relevant to our analysis here. i.e. detecting DIEs that are
13502 present in the abstract instance but not referenced in the concrete
13504 if (child_die
->tag
== DW_TAG_call_site
13505 || child_die
->tag
== DW_TAG_GNU_call_site
)
13508 /* For each CHILD_DIE, find the corresponding child of
13509 ORIGIN_DIE. If there is more than one layer of
13510 DW_AT_abstract_origin, follow them all; there shouldn't be,
13511 but GCC versions at least through 4.4 generate this (GCC PR
13513 child_origin_die
= child_die
;
13514 child_origin_cu
= cu
;
13517 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
13521 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
13525 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
13526 counterpart may exist. */
13527 if (child_origin_die
!= child_die
)
13529 if (child_die
->tag
!= child_origin_die
->tag
13530 && !(child_die
->tag
== DW_TAG_inlined_subroutine
13531 && child_origin_die
->tag
== DW_TAG_subprogram
))
13532 complaint (&symfile_complaints
,
13533 _("Child DIE %s and its abstract origin %s have "
13535 sect_offset_str (child_die
->sect_off
),
13536 sect_offset_str (child_origin_die
->sect_off
));
13537 if (child_origin_die
->parent
!= origin_die
)
13538 complaint (&symfile_complaints
,
13539 _("Child DIE %s and its abstract origin %s have "
13540 "different parents"),
13541 sect_offset_str (child_die
->sect_off
),
13542 sect_offset_str (child_origin_die
->sect_off
));
13544 offsets
.push_back (child_origin_die
->sect_off
);
13547 std::sort (offsets
.begin (), offsets
.end ());
13548 sect_offset
*offsets_end
= offsets
.data () + offsets
.size ();
13549 for (offsetp
= offsets
.data () + 1; offsetp
< offsets_end
; offsetp
++)
13550 if (offsetp
[-1] == *offsetp
)
13551 complaint (&symfile_complaints
,
13552 _("Multiple children of DIE %s refer "
13553 "to DIE %s as their abstract origin"),
13554 sect_offset_str (die
->sect_off
), sect_offset_str (*offsetp
));
13556 offsetp
= offsets
.data ();
13557 origin_child_die
= origin_die
->child
;
13558 while (origin_child_die
&& origin_child_die
->tag
)
13560 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
13561 while (offsetp
< offsets_end
13562 && *offsetp
< origin_child_die
->sect_off
)
13564 if (offsetp
>= offsets_end
13565 || *offsetp
> origin_child_die
->sect_off
)
13567 /* Found that ORIGIN_CHILD_DIE is really not referenced.
13568 Check whether we're already processing ORIGIN_CHILD_DIE.
13569 This can happen with mutually referenced abstract_origins.
13571 if (!origin_child_die
->in_process
)
13572 process_die (origin_child_die
, origin_cu
);
13574 origin_child_die
= sibling_die (origin_child_die
);
13576 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
13580 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13582 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13583 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13584 struct context_stack
*newobj
;
13587 struct die_info
*child_die
;
13588 struct attribute
*attr
, *call_line
, *call_file
;
13590 CORE_ADDR baseaddr
;
13591 struct block
*block
;
13592 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
13593 std::vector
<struct symbol
*> template_args
;
13594 struct template_symbol
*templ_func
= NULL
;
13598 /* If we do not have call site information, we can't show the
13599 caller of this inlined function. That's too confusing, so
13600 only use the scope for local variables. */
13601 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
13602 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
13603 if (call_line
== NULL
|| call_file
== NULL
)
13605 read_lexical_block_scope (die
, cu
);
13610 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13612 name
= dwarf2_name (die
, cu
);
13614 /* Ignore functions with missing or empty names. These are actually
13615 illegal according to the DWARF standard. */
13618 complaint (&symfile_complaints
,
13619 _("missing name for subprogram DIE at %s"),
13620 sect_offset_str (die
->sect_off
));
13624 /* Ignore functions with missing or invalid low and high pc attributes. */
13625 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
13626 <= PC_BOUNDS_INVALID
)
13628 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
13629 if (!attr
|| !DW_UNSND (attr
))
13630 complaint (&symfile_complaints
,
13631 _("cannot get low and high bounds "
13632 "for subprogram DIE at %s"),
13633 sect_offset_str (die
->sect_off
));
13637 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13638 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13640 /* If we have any template arguments, then we must allocate a
13641 different sort of symbol. */
13642 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
13644 if (child_die
->tag
== DW_TAG_template_type_param
13645 || child_die
->tag
== DW_TAG_template_value_param
)
13647 templ_func
= allocate_template_symbol (objfile
);
13648 templ_func
->subclass
= SYMBOL_TEMPLATE
;
13653 newobj
= push_context (0, lowpc
);
13654 newobj
->name
= new_symbol (die
, read_type_die (die
, cu
), cu
,
13655 (struct symbol
*) templ_func
);
13657 /* If there is a location expression for DW_AT_frame_base, record
13659 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
13661 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
13663 /* If there is a location for the static link, record it. */
13664 newobj
->static_link
= NULL
;
13665 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
13668 newobj
->static_link
13669 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
13670 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
);
13673 cu
->list_in_scope
= &local_symbols
;
13675 if (die
->child
!= NULL
)
13677 child_die
= die
->child
;
13678 while (child_die
&& child_die
->tag
)
13680 if (child_die
->tag
== DW_TAG_template_type_param
13681 || child_die
->tag
== DW_TAG_template_value_param
)
13683 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13686 template_args
.push_back (arg
);
13689 process_die (child_die
, cu
);
13690 child_die
= sibling_die (child_die
);
13694 inherit_abstract_dies (die
, cu
);
13696 /* If we have a DW_AT_specification, we might need to import using
13697 directives from the context of the specification DIE. See the
13698 comment in determine_prefix. */
13699 if (cu
->language
== language_cplus
13700 && dwarf2_attr (die
, DW_AT_specification
, cu
))
13702 struct dwarf2_cu
*spec_cu
= cu
;
13703 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
13707 child_die
= spec_die
->child
;
13708 while (child_die
&& child_die
->tag
)
13710 if (child_die
->tag
== DW_TAG_imported_module
)
13711 process_die (child_die
, spec_cu
);
13712 child_die
= sibling_die (child_die
);
13715 /* In some cases, GCC generates specification DIEs that
13716 themselves contain DW_AT_specification attributes. */
13717 spec_die
= die_specification (spec_die
, &spec_cu
);
13721 newobj
= pop_context ();
13722 /* Make a block for the local symbols within. */
13723 block
= finish_block (newobj
->name
, &local_symbols
, newobj
->old_blocks
,
13724 newobj
->static_link
, lowpc
, highpc
);
13726 /* For C++, set the block's scope. */
13727 if ((cu
->language
== language_cplus
13728 || cu
->language
== language_fortran
13729 || cu
->language
== language_d
13730 || cu
->language
== language_rust
)
13731 && cu
->processing_has_namespace_info
)
13732 block_set_scope (block
, determine_prefix (die
, cu
),
13733 &objfile
->objfile_obstack
);
13735 /* If we have address ranges, record them. */
13736 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13738 gdbarch_make_symbol_special (gdbarch
, newobj
->name
, objfile
);
13740 /* Attach template arguments to function. */
13741 if (!template_args
.empty ())
13743 gdb_assert (templ_func
!= NULL
);
13745 templ_func
->n_template_arguments
= template_args
.size ();
13746 templ_func
->template_arguments
13747 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
13748 templ_func
->n_template_arguments
);
13749 memcpy (templ_func
->template_arguments
,
13750 template_args
.data (),
13751 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
13754 /* In C++, we can have functions nested inside functions (e.g., when
13755 a function declares a class that has methods). This means that
13756 when we finish processing a function scope, we may need to go
13757 back to building a containing block's symbol lists. */
13758 local_symbols
= newobj
->locals
;
13759 local_using_directives
= newobj
->local_using_directives
;
13761 /* If we've finished processing a top-level function, subsequent
13762 symbols go in the file symbol list. */
13763 if (outermost_context_p ())
13764 cu
->list_in_scope
= &file_symbols
;
13767 /* Process all the DIES contained within a lexical block scope. Start
13768 a new scope, process the dies, and then close the scope. */
13771 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13773 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13774 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13775 struct context_stack
*newobj
;
13776 CORE_ADDR lowpc
, highpc
;
13777 struct die_info
*child_die
;
13778 CORE_ADDR baseaddr
;
13780 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13782 /* Ignore blocks with missing or invalid low and high pc attributes. */
13783 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
13784 as multiple lexical blocks? Handling children in a sane way would
13785 be nasty. Might be easier to properly extend generic blocks to
13786 describe ranges. */
13787 switch (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
13789 case PC_BOUNDS_NOT_PRESENT
:
13790 /* DW_TAG_lexical_block has no attributes, process its children as if
13791 there was no wrapping by that DW_TAG_lexical_block.
13792 GCC does no longer produces such DWARF since GCC r224161. */
13793 for (child_die
= die
->child
;
13794 child_die
!= NULL
&& child_die
->tag
;
13795 child_die
= sibling_die (child_die
))
13796 process_die (child_die
, cu
);
13798 case PC_BOUNDS_INVALID
:
13801 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13802 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13804 push_context (0, lowpc
);
13805 if (die
->child
!= NULL
)
13807 child_die
= die
->child
;
13808 while (child_die
&& child_die
->tag
)
13810 process_die (child_die
, cu
);
13811 child_die
= sibling_die (child_die
);
13814 inherit_abstract_dies (die
, cu
);
13815 newobj
= pop_context ();
13817 if (local_symbols
!= NULL
|| local_using_directives
!= NULL
)
13819 struct block
*block
13820 = finish_block (0, &local_symbols
, newobj
->old_blocks
, NULL
,
13821 newobj
->start_addr
, highpc
);
13823 /* Note that recording ranges after traversing children, as we
13824 do here, means that recording a parent's ranges entails
13825 walking across all its children's ranges as they appear in
13826 the address map, which is quadratic behavior.
13828 It would be nicer to record the parent's ranges before
13829 traversing its children, simply overriding whatever you find
13830 there. But since we don't even decide whether to create a
13831 block until after we've traversed its children, that's hard
13833 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13835 local_symbols
= newobj
->locals
;
13836 local_using_directives
= newobj
->local_using_directives
;
13839 /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */
13842 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13844 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13845 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13846 CORE_ADDR pc
, baseaddr
;
13847 struct attribute
*attr
;
13848 struct call_site
*call_site
, call_site_local
;
13851 struct die_info
*child_die
;
13853 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13855 attr
= dwarf2_attr (die
, DW_AT_call_return_pc
, cu
);
13858 /* This was a pre-DWARF-5 GNU extension alias
13859 for DW_AT_call_return_pc. */
13860 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13864 complaint (&symfile_complaints
,
13865 _("missing DW_AT_call_return_pc for DW_TAG_call_site "
13866 "DIE %s [in module %s]"),
13867 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13870 pc
= attr_value_as_address (attr
) + baseaddr
;
13871 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
13873 if (cu
->call_site_htab
== NULL
)
13874 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
13875 NULL
, &objfile
->objfile_obstack
,
13876 hashtab_obstack_allocate
, NULL
);
13877 call_site_local
.pc
= pc
;
13878 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
13881 complaint (&symfile_complaints
,
13882 _("Duplicate PC %s for DW_TAG_call_site "
13883 "DIE %s [in module %s]"),
13884 paddress (gdbarch
, pc
), sect_offset_str (die
->sect_off
),
13885 objfile_name (objfile
));
13889 /* Count parameters at the caller. */
13892 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
13893 child_die
= sibling_die (child_die
))
13895 if (child_die
->tag
!= DW_TAG_call_site_parameter
13896 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
13898 complaint (&symfile_complaints
,
13899 _("Tag %d is not DW_TAG_call_site_parameter in "
13900 "DW_TAG_call_site child DIE %s [in module %s]"),
13901 child_die
->tag
, sect_offset_str (child_die
->sect_off
),
13902 objfile_name (objfile
));
13910 = ((struct call_site
*)
13911 obstack_alloc (&objfile
->objfile_obstack
,
13912 sizeof (*call_site
)
13913 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
13915 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
13916 call_site
->pc
= pc
;
13918 if (dwarf2_flag_true_p (die
, DW_AT_call_tail_call
, cu
)
13919 || dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
13921 struct die_info
*func_die
;
13923 /* Skip also over DW_TAG_inlined_subroutine. */
13924 for (func_die
= die
->parent
;
13925 func_die
&& func_die
->tag
!= DW_TAG_subprogram
13926 && func_die
->tag
!= DW_TAG_subroutine_type
;
13927 func_die
= func_die
->parent
);
13929 /* DW_AT_call_all_calls is a superset
13930 of DW_AT_call_all_tail_calls. */
13932 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_calls
, cu
)
13933 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
13934 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_tail_calls
, cu
)
13935 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
13937 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
13938 not complete. But keep CALL_SITE for look ups via call_site_htab,
13939 both the initial caller containing the real return address PC and
13940 the final callee containing the current PC of a chain of tail
13941 calls do not need to have the tail call list complete. But any
13942 function candidate for a virtual tail call frame searched via
13943 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
13944 determined unambiguously. */
13948 struct type
*func_type
= NULL
;
13951 func_type
= get_die_type (func_die
, cu
);
13952 if (func_type
!= NULL
)
13954 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
13956 /* Enlist this call site to the function. */
13957 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
13958 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
13961 complaint (&symfile_complaints
,
13962 _("Cannot find function owning DW_TAG_call_site "
13963 "DIE %s [in module %s]"),
13964 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13968 attr
= dwarf2_attr (die
, DW_AT_call_target
, cu
);
13970 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
13972 attr
= dwarf2_attr (die
, DW_AT_call_origin
, cu
);
13975 /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */
13976 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13978 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
13979 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
13980 /* Keep NULL DWARF_BLOCK. */;
13981 else if (attr_form_is_block (attr
))
13983 struct dwarf2_locexpr_baton
*dlbaton
;
13985 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
13986 dlbaton
->data
= DW_BLOCK (attr
)->data
;
13987 dlbaton
->size
= DW_BLOCK (attr
)->size
;
13988 dlbaton
->per_cu
= cu
->per_cu
;
13990 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
13992 else if (attr_form_is_ref (attr
))
13994 struct dwarf2_cu
*target_cu
= cu
;
13995 struct die_info
*target_die
;
13997 target_die
= follow_die_ref (die
, attr
, &target_cu
);
13998 gdb_assert (target_cu
->per_cu
->dwarf2_per_objfile
->objfile
== objfile
);
13999 if (die_is_declaration (target_die
, target_cu
))
14001 const char *target_physname
;
14003 /* Prefer the mangled name; otherwise compute the demangled one. */
14004 target_physname
= dw2_linkage_name (target_die
, target_cu
);
14005 if (target_physname
== NULL
)
14006 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
14007 if (target_physname
== NULL
)
14008 complaint (&symfile_complaints
,
14009 _("DW_AT_call_target target DIE has invalid "
14010 "physname, for referencing DIE %s [in module %s]"),
14011 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14013 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
14019 /* DW_AT_entry_pc should be preferred. */
14020 if (dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
)
14021 <= PC_BOUNDS_INVALID
)
14022 complaint (&symfile_complaints
,
14023 _("DW_AT_call_target target DIE has invalid "
14024 "low pc, for referencing DIE %s [in module %s]"),
14025 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14028 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
14029 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
14034 complaint (&symfile_complaints
,
14035 _("DW_TAG_call_site DW_AT_call_target is neither "
14036 "block nor reference, for DIE %s [in module %s]"),
14037 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14039 call_site
->per_cu
= cu
->per_cu
;
14041 for (child_die
= die
->child
;
14042 child_die
&& child_die
->tag
;
14043 child_die
= sibling_die (child_die
))
14045 struct call_site_parameter
*parameter
;
14046 struct attribute
*loc
, *origin
;
14048 if (child_die
->tag
!= DW_TAG_call_site_parameter
14049 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
14051 /* Already printed the complaint above. */
14055 gdb_assert (call_site
->parameter_count
< nparams
);
14056 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
14058 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
14059 specifies DW_TAG_formal_parameter. Value of the data assumed for the
14060 register is contained in DW_AT_call_value. */
14062 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
14063 origin
= dwarf2_attr (child_die
, DW_AT_call_parameter
, cu
);
14064 if (origin
== NULL
)
14066 /* This was a pre-DWARF-5 GNU extension alias
14067 for DW_AT_call_parameter. */
14068 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
14070 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
14072 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
14074 sect_offset sect_off
14075 = (sect_offset
) dwarf2_get_ref_die_offset (origin
);
14076 if (!offset_in_cu_p (&cu
->header
, sect_off
))
14078 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
14079 binding can be done only inside one CU. Such referenced DIE
14080 therefore cannot be even moved to DW_TAG_partial_unit. */
14081 complaint (&symfile_complaints
,
14082 _("DW_AT_call_parameter offset is not in CU for "
14083 "DW_TAG_call_site child DIE %s [in module %s]"),
14084 sect_offset_str (child_die
->sect_off
),
14085 objfile_name (objfile
));
14088 parameter
->u
.param_cu_off
14089 = (cu_offset
) (sect_off
- cu
->header
.sect_off
);
14091 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
14093 complaint (&symfile_complaints
,
14094 _("No DW_FORM_block* DW_AT_location for "
14095 "DW_TAG_call_site child DIE %s [in module %s]"),
14096 sect_offset_str (child_die
->sect_off
), objfile_name (objfile
));
14101 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
14102 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
14103 if (parameter
->u
.dwarf_reg
!= -1)
14104 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
14105 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
14106 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
14107 ¶meter
->u
.fb_offset
))
14108 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
14111 complaint (&symfile_complaints
,
14112 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
14113 "for DW_FORM_block* DW_AT_location is supported for "
14114 "DW_TAG_call_site child DIE %s "
14116 sect_offset_str (child_die
->sect_off
),
14117 objfile_name (objfile
));
14122 attr
= dwarf2_attr (child_die
, DW_AT_call_value
, cu
);
14124 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
14125 if (!attr_form_is_block (attr
))
14127 complaint (&symfile_complaints
,
14128 _("No DW_FORM_block* DW_AT_call_value for "
14129 "DW_TAG_call_site child DIE %s [in module %s]"),
14130 sect_offset_str (child_die
->sect_off
),
14131 objfile_name (objfile
));
14134 parameter
->value
= DW_BLOCK (attr
)->data
;
14135 parameter
->value_size
= DW_BLOCK (attr
)->size
;
14137 /* Parameters are not pre-cleared by memset above. */
14138 parameter
->data_value
= NULL
;
14139 parameter
->data_value_size
= 0;
14140 call_site
->parameter_count
++;
14142 attr
= dwarf2_attr (child_die
, DW_AT_call_data_value
, cu
);
14144 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
14147 if (!attr_form_is_block (attr
))
14148 complaint (&symfile_complaints
,
14149 _("No DW_FORM_block* DW_AT_call_data_value for "
14150 "DW_TAG_call_site child DIE %s [in module %s]"),
14151 sect_offset_str (child_die
->sect_off
),
14152 objfile_name (objfile
));
14155 parameter
->data_value
= DW_BLOCK (attr
)->data
;
14156 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
14162 /* Helper function for read_variable. If DIE represents a virtual
14163 table, then return the type of the concrete object that is
14164 associated with the virtual table. Otherwise, return NULL. */
14166 static struct type
*
14167 rust_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14169 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
14173 /* Find the type DIE. */
14174 struct die_info
*type_die
= NULL
;
14175 struct dwarf2_cu
*type_cu
= cu
;
14177 if (attr_form_is_ref (attr
))
14178 type_die
= follow_die_ref (die
, attr
, &type_cu
);
14179 if (type_die
== NULL
)
14182 if (dwarf2_attr (type_die
, DW_AT_containing_type
, type_cu
) == NULL
)
14184 return die_containing_type (type_die
, type_cu
);
14187 /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */
14190 read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
)
14192 struct rust_vtable_symbol
*storage
= NULL
;
14194 if (cu
->language
== language_rust
)
14196 struct type
*containing_type
= rust_containing_type (die
, cu
);
14198 if (containing_type
!= NULL
)
14200 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14202 storage
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
14203 struct rust_vtable_symbol
);
14204 initialize_objfile_symbol (storage
);
14205 storage
->concrete_type
= containing_type
;
14206 storage
->subclass
= SYMBOL_RUST_VTABLE
;
14210 new_symbol (die
, NULL
, cu
, storage
);
14213 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET
14214 reading .debug_rnglists.
14215 Callback's type should be:
14216 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
14217 Return true if the attributes are present and valid, otherwise,
14220 template <typename Callback
>
14222 dwarf2_rnglists_process (unsigned offset
, struct dwarf2_cu
*cu
,
14223 Callback
&&callback
)
14225 struct dwarf2_per_objfile
*dwarf2_per_objfile
14226 = cu
->per_cu
->dwarf2_per_objfile
;
14227 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14228 bfd
*obfd
= objfile
->obfd
;
14229 /* Base address selection entry. */
14232 const gdb_byte
*buffer
;
14233 CORE_ADDR baseaddr
;
14234 bool overflow
= false;
14236 found_base
= cu
->base_known
;
14237 base
= cu
->base_address
;
14239 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->rnglists
);
14240 if (offset
>= dwarf2_per_objfile
->rnglists
.size
)
14242 complaint (&symfile_complaints
,
14243 _("Offset %d out of bounds for DW_AT_ranges attribute"),
14247 buffer
= dwarf2_per_objfile
->rnglists
.buffer
+ offset
;
14249 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14253 /* Initialize it due to a false compiler warning. */
14254 CORE_ADDR range_beginning
= 0, range_end
= 0;
14255 const gdb_byte
*buf_end
= (dwarf2_per_objfile
->rnglists
.buffer
14256 + dwarf2_per_objfile
->rnglists
.size
);
14257 unsigned int bytes_read
;
14259 if (buffer
== buf_end
)
14264 const auto rlet
= static_cast<enum dwarf_range_list_entry
>(*buffer
++);
14267 case DW_RLE_end_of_list
:
14269 case DW_RLE_base_address
:
14270 if (buffer
+ cu
->header
.addr_size
> buf_end
)
14275 base
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14277 buffer
+= bytes_read
;
14279 case DW_RLE_start_length
:
14280 if (buffer
+ cu
->header
.addr_size
> buf_end
)
14285 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14286 buffer
+= bytes_read
;
14287 range_end
= (range_beginning
14288 + read_unsigned_leb128 (obfd
, buffer
, &bytes_read
));
14289 buffer
+= bytes_read
;
14290 if (buffer
> buf_end
)
14296 case DW_RLE_offset_pair
:
14297 range_beginning
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14298 buffer
+= bytes_read
;
14299 if (buffer
> buf_end
)
14304 range_end
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14305 buffer
+= bytes_read
;
14306 if (buffer
> buf_end
)
14312 case DW_RLE_start_end
:
14313 if (buffer
+ 2 * cu
->header
.addr_size
> buf_end
)
14318 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14319 buffer
+= bytes_read
;
14320 range_end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14321 buffer
+= bytes_read
;
14324 complaint (&symfile_complaints
,
14325 _("Invalid .debug_rnglists data (no base address)"));
14328 if (rlet
== DW_RLE_end_of_list
|| overflow
)
14330 if (rlet
== DW_RLE_base_address
)
14335 /* We have no valid base address for the ranges
14337 complaint (&symfile_complaints
,
14338 _("Invalid .debug_rnglists data (no base address)"));
14342 if (range_beginning
> range_end
)
14344 /* Inverted range entries are invalid. */
14345 complaint (&symfile_complaints
,
14346 _("Invalid .debug_rnglists data (inverted range)"));
14350 /* Empty range entries have no effect. */
14351 if (range_beginning
== range_end
)
14354 range_beginning
+= base
;
14357 /* A not-uncommon case of bad debug info.
14358 Don't pollute the addrmap with bad data. */
14359 if (range_beginning
+ baseaddr
== 0
14360 && !dwarf2_per_objfile
->has_section_at_zero
)
14362 complaint (&symfile_complaints
,
14363 _(".debug_rnglists entry has start address of zero"
14364 " [in module %s]"), objfile_name (objfile
));
14368 callback (range_beginning
, range_end
);
14373 complaint (&symfile_complaints
,
14374 _("Offset %d is not terminated "
14375 "for DW_AT_ranges attribute"),
14383 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges.
14384 Callback's type should be:
14385 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
14386 Return 1 if the attributes are present and valid, otherwise, return 0. */
14388 template <typename Callback
>
14390 dwarf2_ranges_process (unsigned offset
, struct dwarf2_cu
*cu
,
14391 Callback
&&callback
)
14393 struct dwarf2_per_objfile
*dwarf2_per_objfile
14394 = cu
->per_cu
->dwarf2_per_objfile
;
14395 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14396 struct comp_unit_head
*cu_header
= &cu
->header
;
14397 bfd
*obfd
= objfile
->obfd
;
14398 unsigned int addr_size
= cu_header
->addr_size
;
14399 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
14400 /* Base address selection entry. */
14403 unsigned int dummy
;
14404 const gdb_byte
*buffer
;
14405 CORE_ADDR baseaddr
;
14407 if (cu_header
->version
>= 5)
14408 return dwarf2_rnglists_process (offset
, cu
, callback
);
14410 found_base
= cu
->base_known
;
14411 base
= cu
->base_address
;
14413 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
14414 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
14416 complaint (&symfile_complaints
,
14417 _("Offset %d out of bounds for DW_AT_ranges attribute"),
14421 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
14423 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14427 CORE_ADDR range_beginning
, range_end
;
14429 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
14430 buffer
+= addr_size
;
14431 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
14432 buffer
+= addr_size
;
14433 offset
+= 2 * addr_size
;
14435 /* An end of list marker is a pair of zero addresses. */
14436 if (range_beginning
== 0 && range_end
== 0)
14437 /* Found the end of list entry. */
14440 /* Each base address selection entry is a pair of 2 values.
14441 The first is the largest possible address, the second is
14442 the base address. Check for a base address here. */
14443 if ((range_beginning
& mask
) == mask
)
14445 /* If we found the largest possible address, then we already
14446 have the base address in range_end. */
14454 /* We have no valid base address for the ranges
14456 complaint (&symfile_complaints
,
14457 _("Invalid .debug_ranges data (no base address)"));
14461 if (range_beginning
> range_end
)
14463 /* Inverted range entries are invalid. */
14464 complaint (&symfile_complaints
,
14465 _("Invalid .debug_ranges data (inverted range)"));
14469 /* Empty range entries have no effect. */
14470 if (range_beginning
== range_end
)
14473 range_beginning
+= base
;
14476 /* A not-uncommon case of bad debug info.
14477 Don't pollute the addrmap with bad data. */
14478 if (range_beginning
+ baseaddr
== 0
14479 && !dwarf2_per_objfile
->has_section_at_zero
)
14481 complaint (&symfile_complaints
,
14482 _(".debug_ranges entry has start address of zero"
14483 " [in module %s]"), objfile_name (objfile
));
14487 callback (range_beginning
, range_end
);
14493 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
14494 Return 1 if the attributes are present and valid, otherwise, return 0.
14495 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
14498 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
14499 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
14500 struct partial_symtab
*ranges_pst
)
14502 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14503 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14504 const CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
14505 SECT_OFF_TEXT (objfile
));
14508 CORE_ADDR high
= 0;
14511 retval
= dwarf2_ranges_process (offset
, cu
,
14512 [&] (CORE_ADDR range_beginning
, CORE_ADDR range_end
)
14514 if (ranges_pst
!= NULL
)
14519 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
14520 range_beginning
+ baseaddr
);
14521 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
14522 range_end
+ baseaddr
);
14523 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
14527 /* FIXME: This is recording everything as a low-high
14528 segment of consecutive addresses. We should have a
14529 data structure for discontiguous block ranges
14533 low
= range_beginning
;
14539 if (range_beginning
< low
)
14540 low
= range_beginning
;
14541 if (range_end
> high
)
14549 /* If the first entry is an end-of-list marker, the range
14550 describes an empty scope, i.e. no instructions. */
14556 *high_return
= high
;
14560 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
14561 definition for the return value. *LOWPC and *HIGHPC are set iff
14562 neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */
14564 static enum pc_bounds_kind
14565 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
14566 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
14567 struct partial_symtab
*pst
)
14569 struct dwarf2_per_objfile
*dwarf2_per_objfile
14570 = cu
->per_cu
->dwarf2_per_objfile
;
14571 struct attribute
*attr
;
14572 struct attribute
*attr_high
;
14574 CORE_ADDR high
= 0;
14575 enum pc_bounds_kind ret
;
14577 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14580 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14583 low
= attr_value_as_address (attr
);
14584 high
= attr_value_as_address (attr_high
);
14585 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
14589 /* Found high w/o low attribute. */
14590 return PC_BOUNDS_INVALID
;
14592 /* Found consecutive range of addresses. */
14593 ret
= PC_BOUNDS_HIGH_LOW
;
14597 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14600 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
14601 We take advantage of the fact that DW_AT_ranges does not appear
14602 in DW_TAG_compile_unit of DWO files. */
14603 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14604 unsigned int ranges_offset
= (DW_UNSND (attr
)
14605 + (need_ranges_base
14609 /* Value of the DW_AT_ranges attribute is the offset in the
14610 .debug_ranges section. */
14611 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
14612 return PC_BOUNDS_INVALID
;
14613 /* Found discontinuous range of addresses. */
14614 ret
= PC_BOUNDS_RANGES
;
14617 return PC_BOUNDS_NOT_PRESENT
;
14620 /* partial_die_info::read has also the strict LOW < HIGH requirement. */
14622 return PC_BOUNDS_INVALID
;
14624 /* When using the GNU linker, .gnu.linkonce. sections are used to
14625 eliminate duplicate copies of functions and vtables and such.
14626 The linker will arbitrarily choose one and discard the others.
14627 The AT_*_pc values for such functions refer to local labels in
14628 these sections. If the section from that file was discarded, the
14629 labels are not in the output, so the relocs get a value of 0.
14630 If this is a discarded function, mark the pc bounds as invalid,
14631 so that GDB will ignore it. */
14632 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
14633 return PC_BOUNDS_INVALID
;
14641 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
14642 its low and high PC addresses. Do nothing if these addresses could not
14643 be determined. Otherwise, set LOWPC to the low address if it is smaller,
14644 and HIGHPC to the high address if greater than HIGHPC. */
14647 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
14648 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14649 struct dwarf2_cu
*cu
)
14651 CORE_ADDR low
, high
;
14652 struct die_info
*child
= die
->child
;
14654 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
) >= PC_BOUNDS_RANGES
)
14656 *lowpc
= std::min (*lowpc
, low
);
14657 *highpc
= std::max (*highpc
, high
);
14660 /* If the language does not allow nested subprograms (either inside
14661 subprograms or lexical blocks), we're done. */
14662 if (cu
->language
!= language_ada
)
14665 /* Check all the children of the given DIE. If it contains nested
14666 subprograms, then check their pc bounds. Likewise, we need to
14667 check lexical blocks as well, as they may also contain subprogram
14669 while (child
&& child
->tag
)
14671 if (child
->tag
== DW_TAG_subprogram
14672 || child
->tag
== DW_TAG_lexical_block
)
14673 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
14674 child
= sibling_die (child
);
14678 /* Get the low and high pc's represented by the scope DIE, and store
14679 them in *LOWPC and *HIGHPC. If the correct values can't be
14680 determined, set *LOWPC to -1 and *HIGHPC to 0. */
14683 get_scope_pc_bounds (struct die_info
*die
,
14684 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14685 struct dwarf2_cu
*cu
)
14687 CORE_ADDR best_low
= (CORE_ADDR
) -1;
14688 CORE_ADDR best_high
= (CORE_ADDR
) 0;
14689 CORE_ADDR current_low
, current_high
;
14691 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
14692 >= PC_BOUNDS_RANGES
)
14694 best_low
= current_low
;
14695 best_high
= current_high
;
14699 struct die_info
*child
= die
->child
;
14701 while (child
&& child
->tag
)
14703 switch (child
->tag
) {
14704 case DW_TAG_subprogram
:
14705 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
14707 case DW_TAG_namespace
:
14708 case DW_TAG_module
:
14709 /* FIXME: carlton/2004-01-16: Should we do this for
14710 DW_TAG_class_type/DW_TAG_structure_type, too? I think
14711 that current GCC's always emit the DIEs corresponding
14712 to definitions of methods of classes as children of a
14713 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
14714 the DIEs giving the declarations, which could be
14715 anywhere). But I don't see any reason why the
14716 standards says that they have to be there. */
14717 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
14719 if (current_low
!= ((CORE_ADDR
) -1))
14721 best_low
= std::min (best_low
, current_low
);
14722 best_high
= std::max (best_high
, current_high
);
14730 child
= sibling_die (child
);
14735 *highpc
= best_high
;
14738 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
14742 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
14743 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
14745 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14746 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14747 struct attribute
*attr
;
14748 struct attribute
*attr_high
;
14750 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14753 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14756 CORE_ADDR low
= attr_value_as_address (attr
);
14757 CORE_ADDR high
= attr_value_as_address (attr_high
);
14759 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
14762 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
14763 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
14764 record_block_range (block
, low
, high
- 1);
14768 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14771 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
14772 We take advantage of the fact that DW_AT_ranges does not appear
14773 in DW_TAG_compile_unit of DWO files. */
14774 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14776 /* The value of the DW_AT_ranges attribute is the offset of the
14777 address range list in the .debug_ranges section. */
14778 unsigned long offset
= (DW_UNSND (attr
)
14779 + (need_ranges_base
? cu
->ranges_base
: 0));
14781 dwarf2_ranges_process (offset
, cu
,
14782 [&] (CORE_ADDR start
, CORE_ADDR end
)
14786 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
14787 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
14788 record_block_range (block
, start
, end
- 1);
14793 /* Check whether the producer field indicates either of GCC < 4.6, or the
14794 Intel C/C++ compiler, and cache the result in CU. */
14797 check_producer (struct dwarf2_cu
*cu
)
14801 if (cu
->producer
== NULL
)
14803 /* For unknown compilers expect their behavior is DWARF version
14806 GCC started to support .debug_types sections by -gdwarf-4 since
14807 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
14808 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
14809 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
14810 interpreted incorrectly by GDB now - GCC PR debug/48229. */
14812 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
14814 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
14815 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
14817 else if (producer_is_icc (cu
->producer
, &major
, &minor
))
14818 cu
->producer_is_icc_lt_14
= major
< 14;
14821 /* For other non-GCC compilers, expect their behavior is DWARF version
14825 cu
->checked_producer
= 1;
14828 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
14829 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
14830 during 4.6.0 experimental. */
14833 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
14835 if (!cu
->checked_producer
)
14836 check_producer (cu
);
14838 return cu
->producer_is_gxx_lt_4_6
;
14841 /* Return the default accessibility type if it is not overriden by
14842 DW_AT_accessibility. */
14844 static enum dwarf_access_attribute
14845 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
14847 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
14849 /* The default DWARF 2 accessibility for members is public, the default
14850 accessibility for inheritance is private. */
14852 if (die
->tag
!= DW_TAG_inheritance
)
14853 return DW_ACCESS_public
;
14855 return DW_ACCESS_private
;
14859 /* DWARF 3+ defines the default accessibility a different way. The same
14860 rules apply now for DW_TAG_inheritance as for the members and it only
14861 depends on the container kind. */
14863 if (die
->parent
->tag
== DW_TAG_class_type
)
14864 return DW_ACCESS_private
;
14866 return DW_ACCESS_public
;
14870 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
14871 offset. If the attribute was not found return 0, otherwise return
14872 1. If it was found but could not properly be handled, set *OFFSET
14876 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
14879 struct attribute
*attr
;
14881 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
14886 /* Note that we do not check for a section offset first here.
14887 This is because DW_AT_data_member_location is new in DWARF 4,
14888 so if we see it, we can assume that a constant form is really
14889 a constant and not a section offset. */
14890 if (attr_form_is_constant (attr
))
14891 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
14892 else if (attr_form_is_section_offset (attr
))
14893 dwarf2_complex_location_expr_complaint ();
14894 else if (attr_form_is_block (attr
))
14895 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
14897 dwarf2_complex_location_expr_complaint ();
14905 /* Add an aggregate field to the field list. */
14908 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
14909 struct dwarf2_cu
*cu
)
14911 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14912 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14913 struct nextfield
*new_field
;
14914 struct attribute
*attr
;
14916 const char *fieldname
= "";
14918 if (die
->tag
== DW_TAG_inheritance
)
14920 fip
->baseclasses
.emplace_back ();
14921 new_field
= &fip
->baseclasses
.back ();
14925 fip
->fields
.emplace_back ();
14926 new_field
= &fip
->fields
.back ();
14931 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14933 new_field
->accessibility
= DW_UNSND (attr
);
14935 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
14936 if (new_field
->accessibility
!= DW_ACCESS_public
)
14937 fip
->non_public_fields
= 1;
14939 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
14941 new_field
->virtuality
= DW_UNSND (attr
);
14943 new_field
->virtuality
= DW_VIRTUALITY_none
;
14945 fp
= &new_field
->field
;
14947 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
14951 /* Data member other than a C++ static data member. */
14953 /* Get type of field. */
14954 fp
->type
= die_type (die
, cu
);
14956 SET_FIELD_BITPOS (*fp
, 0);
14958 /* Get bit size of field (zero if none). */
14959 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
14962 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
14966 FIELD_BITSIZE (*fp
) = 0;
14969 /* Get bit offset of field. */
14970 if (handle_data_member_location (die
, cu
, &offset
))
14971 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
14972 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
14975 if (gdbarch_bits_big_endian (gdbarch
))
14977 /* For big endian bits, the DW_AT_bit_offset gives the
14978 additional bit offset from the MSB of the containing
14979 anonymous object to the MSB of the field. We don't
14980 have to do anything special since we don't need to
14981 know the size of the anonymous object. */
14982 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
14986 /* For little endian bits, compute the bit offset to the
14987 MSB of the anonymous object, subtract off the number of
14988 bits from the MSB of the field to the MSB of the
14989 object, and then subtract off the number of bits of
14990 the field itself. The result is the bit offset of
14991 the LSB of the field. */
14992 int anonymous_size
;
14993 int bit_offset
= DW_UNSND (attr
);
14995 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14998 /* The size of the anonymous object containing
14999 the bit field is explicit, so use the
15000 indicated size (in bytes). */
15001 anonymous_size
= DW_UNSND (attr
);
15005 /* The size of the anonymous object containing
15006 the bit field must be inferred from the type
15007 attribute of the data member containing the
15009 anonymous_size
= TYPE_LENGTH (fp
->type
);
15011 SET_FIELD_BITPOS (*fp
,
15012 (FIELD_BITPOS (*fp
)
15013 + anonymous_size
* bits_per_byte
15014 - bit_offset
- FIELD_BITSIZE (*fp
)));
15017 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
15019 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
15020 + dwarf2_get_attr_constant_value (attr
, 0)));
15022 /* Get name of field. */
15023 fieldname
= dwarf2_name (die
, cu
);
15024 if (fieldname
== NULL
)
15027 /* The name is already allocated along with this objfile, so we don't
15028 need to duplicate it for the type. */
15029 fp
->name
= fieldname
;
15031 /* Change accessibility for artificial fields (e.g. virtual table
15032 pointer or virtual base class pointer) to private. */
15033 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
15035 FIELD_ARTIFICIAL (*fp
) = 1;
15036 new_field
->accessibility
= DW_ACCESS_private
;
15037 fip
->non_public_fields
= 1;
15040 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
15042 /* C++ static member. */
15044 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
15045 is a declaration, but all versions of G++ as of this writing
15046 (so through at least 3.2.1) incorrectly generate
15047 DW_TAG_variable tags. */
15049 const char *physname
;
15051 /* Get name of field. */
15052 fieldname
= dwarf2_name (die
, cu
);
15053 if (fieldname
== NULL
)
15056 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
15058 /* Only create a symbol if this is an external value.
15059 new_symbol checks this and puts the value in the global symbol
15060 table, which we want. If it is not external, new_symbol
15061 will try to put the value in cu->list_in_scope which is wrong. */
15062 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
15064 /* A static const member, not much different than an enum as far as
15065 we're concerned, except that we can support more types. */
15066 new_symbol (die
, NULL
, cu
);
15069 /* Get physical name. */
15070 physname
= dwarf2_physname (fieldname
, die
, cu
);
15072 /* The name is already allocated along with this objfile, so we don't
15073 need to duplicate it for the type. */
15074 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
15075 FIELD_TYPE (*fp
) = die_type (die
, cu
);
15076 FIELD_NAME (*fp
) = fieldname
;
15078 else if (die
->tag
== DW_TAG_inheritance
)
15082 /* C++ base class field. */
15083 if (handle_data_member_location (die
, cu
, &offset
))
15084 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
15085 FIELD_BITSIZE (*fp
) = 0;
15086 FIELD_TYPE (*fp
) = die_type (die
, cu
);
15087 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
15089 else if (die
->tag
== DW_TAG_variant_part
)
15091 /* process_structure_scope will treat this DIE as a union. */
15092 process_structure_scope (die
, cu
);
15094 /* The variant part is relative to the start of the enclosing
15096 SET_FIELD_BITPOS (*fp
, 0);
15097 fp
->type
= get_die_type (die
, cu
);
15098 fp
->artificial
= 1;
15099 fp
->name
= "<<variant>>";
15102 gdb_assert_not_reached ("missing case in dwarf2_add_field");
15105 /* Can the type given by DIE define another type? */
15108 type_can_define_types (const struct die_info
*die
)
15112 case DW_TAG_typedef
:
15113 case DW_TAG_class_type
:
15114 case DW_TAG_structure_type
:
15115 case DW_TAG_union_type
:
15116 case DW_TAG_enumeration_type
:
15124 /* Add a type definition defined in the scope of the FIP's class. */
15127 dwarf2_add_type_defn (struct field_info
*fip
, struct die_info
*die
,
15128 struct dwarf2_cu
*cu
)
15130 struct decl_field fp
;
15131 memset (&fp
, 0, sizeof (fp
));
15133 gdb_assert (type_can_define_types (die
));
15135 /* Get name of field. NULL is okay here, meaning an anonymous type. */
15136 fp
.name
= dwarf2_name (die
, cu
);
15137 fp
.type
= read_type_die (die
, cu
);
15139 /* Save accessibility. */
15140 enum dwarf_access_attribute accessibility
;
15141 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15143 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15145 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15146 switch (accessibility
)
15148 case DW_ACCESS_public
:
15149 /* The assumed value if neither private nor protected. */
15151 case DW_ACCESS_private
:
15154 case DW_ACCESS_protected
:
15155 fp
.is_protected
= 1;
15158 complaint (&symfile_complaints
,
15159 _("Unhandled DW_AT_accessibility value (%x)"), accessibility
);
15162 if (die
->tag
== DW_TAG_typedef
)
15163 fip
->typedef_field_list
.push_back (fp
);
15165 fip
->nested_types_list
.push_back (fp
);
15168 /* Create the vector of fields, and attach it to the type. */
15171 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
15172 struct dwarf2_cu
*cu
)
15174 int nfields
= fip
->nfields
;
15176 /* Record the field count, allocate space for the array of fields,
15177 and create blank accessibility bitfields if necessary. */
15178 TYPE_NFIELDS (type
) = nfields
;
15179 TYPE_FIELDS (type
) = (struct field
*)
15180 TYPE_ZALLOC (type
, sizeof (struct field
) * nfields
);
15182 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
15184 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15186 TYPE_FIELD_PRIVATE_BITS (type
) =
15187 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15188 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
15190 TYPE_FIELD_PROTECTED_BITS (type
) =
15191 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15192 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
15194 TYPE_FIELD_IGNORE_BITS (type
) =
15195 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15196 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
15199 /* If the type has baseclasses, allocate and clear a bit vector for
15200 TYPE_FIELD_VIRTUAL_BITS. */
15201 if (!fip
->baseclasses
.empty () && cu
->language
!= language_ada
)
15203 int num_bytes
= B_BYTES (fip
->baseclasses
.size ());
15204 unsigned char *pointer
;
15206 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15207 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
15208 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
15209 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->baseclasses
.size ());
15210 TYPE_N_BASECLASSES (type
) = fip
->baseclasses
.size ();
15213 if (TYPE_FLAG_DISCRIMINATED_UNION (type
))
15215 struct discriminant_info
*di
= alloc_discriminant_info (type
, -1, -1);
15217 for (int index
= 0; index
< nfields
; ++index
)
15219 struct nextfield
&field
= fip
->fields
[index
];
15221 if (field
.variant
.is_discriminant
)
15222 di
->discriminant_index
= index
;
15223 else if (field
.variant
.default_branch
)
15224 di
->default_index
= index
;
15226 di
->discriminants
[index
] = field
.variant
.discriminant_value
;
15230 /* Copy the saved-up fields into the field vector. */
15231 for (int i
= 0; i
< nfields
; ++i
)
15233 struct nextfield
&field
15234 = ((i
< fip
->baseclasses
.size ()) ? fip
->baseclasses
[i
]
15235 : fip
->fields
[i
- fip
->baseclasses
.size ()]);
15237 TYPE_FIELD (type
, i
) = field
.field
;
15238 switch (field
.accessibility
)
15240 case DW_ACCESS_private
:
15241 if (cu
->language
!= language_ada
)
15242 SET_TYPE_FIELD_PRIVATE (type
, i
);
15245 case DW_ACCESS_protected
:
15246 if (cu
->language
!= language_ada
)
15247 SET_TYPE_FIELD_PROTECTED (type
, i
);
15250 case DW_ACCESS_public
:
15254 /* Unknown accessibility. Complain and treat it as public. */
15256 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
15257 field
.accessibility
);
15261 if (i
< fip
->baseclasses
.size ())
15263 switch (field
.virtuality
)
15265 case DW_VIRTUALITY_virtual
:
15266 case DW_VIRTUALITY_pure_virtual
:
15267 if (cu
->language
== language_ada
)
15268 error (_("unexpected virtuality in component of Ada type"));
15269 SET_TYPE_FIELD_VIRTUAL (type
, i
);
15276 /* Return true if this member function is a constructor, false
15280 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
15282 const char *fieldname
;
15283 const char *type_name
;
15286 if (die
->parent
== NULL
)
15289 if (die
->parent
->tag
!= DW_TAG_structure_type
15290 && die
->parent
->tag
!= DW_TAG_union_type
15291 && die
->parent
->tag
!= DW_TAG_class_type
)
15294 fieldname
= dwarf2_name (die
, cu
);
15295 type_name
= dwarf2_name (die
->parent
, cu
);
15296 if (fieldname
== NULL
|| type_name
== NULL
)
15299 len
= strlen (fieldname
);
15300 return (strncmp (fieldname
, type_name
, len
) == 0
15301 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
15304 /* Add a member function to the proper fieldlist. */
15307 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
15308 struct type
*type
, struct dwarf2_cu
*cu
)
15310 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15311 struct attribute
*attr
;
15313 struct fnfieldlist
*flp
= nullptr;
15314 struct fn_field
*fnp
;
15315 const char *fieldname
;
15316 struct type
*this_type
;
15317 enum dwarf_access_attribute accessibility
;
15319 if (cu
->language
== language_ada
)
15320 error (_("unexpected member function in Ada type"));
15322 /* Get name of member function. */
15323 fieldname
= dwarf2_name (die
, cu
);
15324 if (fieldname
== NULL
)
15327 /* Look up member function name in fieldlist. */
15328 for (i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15330 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
15332 flp
= &fip
->fnfieldlists
[i
];
15337 /* Create a new fnfieldlist if necessary. */
15338 if (flp
== nullptr)
15340 fip
->fnfieldlists
.emplace_back ();
15341 flp
= &fip
->fnfieldlists
.back ();
15342 flp
->name
= fieldname
;
15343 i
= fip
->fnfieldlists
.size () - 1;
15346 /* Create a new member function field and add it to the vector of
15348 flp
->fnfields
.emplace_back ();
15349 fnp
= &flp
->fnfields
.back ();
15351 /* Delay processing of the physname until later. */
15352 if (cu
->language
== language_cplus
)
15353 add_to_method_list (type
, i
, flp
->fnfields
.size () - 1, fieldname
,
15357 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
15358 fnp
->physname
= physname
? physname
: "";
15361 fnp
->type
= alloc_type (objfile
);
15362 this_type
= read_type_die (die
, cu
);
15363 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
15365 int nparams
= TYPE_NFIELDS (this_type
);
15367 /* TYPE is the domain of this method, and THIS_TYPE is the type
15368 of the method itself (TYPE_CODE_METHOD). */
15369 smash_to_method_type (fnp
->type
, type
,
15370 TYPE_TARGET_TYPE (this_type
),
15371 TYPE_FIELDS (this_type
),
15372 TYPE_NFIELDS (this_type
),
15373 TYPE_VARARGS (this_type
));
15375 /* Handle static member functions.
15376 Dwarf2 has no clean way to discern C++ static and non-static
15377 member functions. G++ helps GDB by marking the first
15378 parameter for non-static member functions (which is the this
15379 pointer) as artificial. We obtain this information from
15380 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
15381 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
15382 fnp
->voffset
= VOFFSET_STATIC
;
15385 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
15386 dwarf2_full_name (fieldname
, die
, cu
));
15388 /* Get fcontext from DW_AT_containing_type if present. */
15389 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15390 fnp
->fcontext
= die_containing_type (die
, cu
);
15392 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
15393 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
15395 /* Get accessibility. */
15396 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15398 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15400 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15401 switch (accessibility
)
15403 case DW_ACCESS_private
:
15404 fnp
->is_private
= 1;
15406 case DW_ACCESS_protected
:
15407 fnp
->is_protected
= 1;
15411 /* Check for artificial methods. */
15412 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
15413 if (attr
&& DW_UNSND (attr
) != 0)
15414 fnp
->is_artificial
= 1;
15416 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
15418 /* Get index in virtual function table if it is a virtual member
15419 function. For older versions of GCC, this is an offset in the
15420 appropriate virtual table, as specified by DW_AT_containing_type.
15421 For everyone else, it is an expression to be evaluated relative
15422 to the object address. */
15424 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
15427 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
15429 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
15431 /* Old-style GCC. */
15432 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
15434 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
15435 || (DW_BLOCK (attr
)->size
> 1
15436 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
15437 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
15439 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
15440 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
15441 dwarf2_complex_location_expr_complaint ();
15443 fnp
->voffset
/= cu
->header
.addr_size
;
15447 dwarf2_complex_location_expr_complaint ();
15449 if (!fnp
->fcontext
)
15451 /* If there is no `this' field and no DW_AT_containing_type,
15452 we cannot actually find a base class context for the
15454 if (TYPE_NFIELDS (this_type
) == 0
15455 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
15457 complaint (&symfile_complaints
,
15458 _("cannot determine context for virtual member "
15459 "function \"%s\" (offset %s)"),
15460 fieldname
, sect_offset_str (die
->sect_off
));
15465 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
15469 else if (attr_form_is_section_offset (attr
))
15471 dwarf2_complex_location_expr_complaint ();
15475 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
15481 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
15482 if (attr
&& DW_UNSND (attr
))
15484 /* GCC does this, as of 2008-08-25; PR debug/37237. */
15485 complaint (&symfile_complaints
,
15486 _("Member function \"%s\" (offset %s) is virtual "
15487 "but the vtable offset is not specified"),
15488 fieldname
, sect_offset_str (die
->sect_off
));
15489 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15490 TYPE_CPLUS_DYNAMIC (type
) = 1;
15495 /* Create the vector of member function fields, and attach it to the type. */
15498 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
15499 struct dwarf2_cu
*cu
)
15501 if (cu
->language
== language_ada
)
15502 error (_("unexpected member functions in Ada type"));
15504 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15505 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
15507 sizeof (struct fn_fieldlist
) * fip
->fnfieldlists
.size ());
15509 for (int i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15511 struct fnfieldlist
&nf
= fip
->fnfieldlists
[i
];
15512 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
15514 TYPE_FN_FIELDLIST_NAME (type
, i
) = nf
.name
;
15515 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = nf
.fnfields
.size ();
15516 fn_flp
->fn_fields
= (struct fn_field
*)
15517 TYPE_ALLOC (type
, sizeof (struct fn_field
) * nf
.fnfields
.size ());
15519 for (int k
= 0; k
< nf
.fnfields
.size (); ++k
)
15520 fn_flp
->fn_fields
[k
] = nf
.fnfields
[k
];
15523 TYPE_NFN_FIELDS (type
) = fip
->fnfieldlists
.size ();
15526 /* Returns non-zero if NAME is the name of a vtable member in CU's
15527 language, zero otherwise. */
15529 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
15531 static const char vptr
[] = "_vptr";
15533 /* Look for the C++ form of the vtable. */
15534 if (startswith (name
, vptr
) && is_cplus_marker (name
[sizeof (vptr
) - 1]))
15540 /* GCC outputs unnamed structures that are really pointers to member
15541 functions, with the ABI-specified layout. If TYPE describes
15542 such a structure, smash it into a member function type.
15544 GCC shouldn't do this; it should just output pointer to member DIEs.
15545 This is GCC PR debug/28767. */
15548 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
15550 struct type
*pfn_type
, *self_type
, *new_type
;
15552 /* Check for a structure with no name and two children. */
15553 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
15556 /* Check for __pfn and __delta members. */
15557 if (TYPE_FIELD_NAME (type
, 0) == NULL
15558 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
15559 || TYPE_FIELD_NAME (type
, 1) == NULL
15560 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
15563 /* Find the type of the method. */
15564 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
15565 if (pfn_type
== NULL
15566 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
15567 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
15570 /* Look for the "this" argument. */
15571 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
15572 if (TYPE_NFIELDS (pfn_type
) == 0
15573 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
15574 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
15577 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
15578 new_type
= alloc_type (objfile
);
15579 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
15580 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
15581 TYPE_VARARGS (pfn_type
));
15582 smash_to_methodptr_type (type
, new_type
);
15585 /* If the DIE has a DW_AT_alignment attribute, return its value, doing
15586 appropriate error checking and issuing complaints if there is a
15590 get_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
)
15592 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_alignment
, cu
);
15594 if (attr
== nullptr)
15597 if (!attr_form_is_constant (attr
))
15599 complaint (&symfile_complaints
,
15600 _("DW_AT_alignment must have constant form"
15601 " - DIE at %s [in module %s]"),
15602 sect_offset_str (die
->sect_off
),
15603 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15608 if (attr
->form
== DW_FORM_sdata
)
15610 LONGEST val
= DW_SND (attr
);
15613 complaint (&symfile_complaints
,
15614 _("DW_AT_alignment value must not be negative"
15615 " - DIE at %s [in module %s]"),
15616 sect_offset_str (die
->sect_off
),
15617 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15623 align
= DW_UNSND (attr
);
15627 complaint (&symfile_complaints
,
15628 _("DW_AT_alignment value must not be zero"
15629 " - DIE at %s [in module %s]"),
15630 sect_offset_str (die
->sect_off
),
15631 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15634 if ((align
& (align
- 1)) != 0)
15636 complaint (&symfile_complaints
,
15637 _("DW_AT_alignment value must be a power of 2"
15638 " - DIE at %s [in module %s]"),
15639 sect_offset_str (die
->sect_off
),
15640 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15647 /* If the DIE has a DW_AT_alignment attribute, use its value to set
15648 the alignment for TYPE. */
15651 maybe_set_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
,
15654 if (!set_type_align (type
, get_alignment (cu
, die
)))
15655 complaint (&symfile_complaints
,
15656 _("DW_AT_alignment value too large"
15657 " - DIE at %s [in module %s]"),
15658 sect_offset_str (die
->sect_off
),
15659 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15662 /* Called when we find the DIE that starts a structure or union scope
15663 (definition) to create a type for the structure or union. Fill in
15664 the type's name and general properties; the members will not be
15665 processed until process_structure_scope. A symbol table entry for
15666 the type will also not be done until process_structure_scope (assuming
15667 the type has a name).
15669 NOTE: we need to call these functions regardless of whether or not the
15670 DIE has a DW_AT_name attribute, since it might be an anonymous
15671 structure or union. This gets the type entered into our set of
15672 user defined types. */
15674 static struct type
*
15675 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15677 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15679 struct attribute
*attr
;
15682 /* If the definition of this type lives in .debug_types, read that type.
15683 Don't follow DW_AT_specification though, that will take us back up
15684 the chain and we want to go down. */
15685 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
15688 type
= get_DW_AT_signature_type (die
, attr
, cu
);
15690 /* The type's CU may not be the same as CU.
15691 Ensure TYPE is recorded with CU in die_type_hash. */
15692 return set_die_type (die
, type
, cu
);
15695 type
= alloc_type (objfile
);
15696 INIT_CPLUS_SPECIFIC (type
);
15698 name
= dwarf2_name (die
, cu
);
15701 if (cu
->language
== language_cplus
15702 || cu
->language
== language_d
15703 || cu
->language
== language_rust
)
15705 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
15707 /* dwarf2_full_name might have already finished building the DIE's
15708 type. If so, there is no need to continue. */
15709 if (get_die_type (die
, cu
) != NULL
)
15710 return get_die_type (die
, cu
);
15712 TYPE_TAG_NAME (type
) = full_name
;
15713 if (die
->tag
== DW_TAG_structure_type
15714 || die
->tag
== DW_TAG_class_type
)
15715 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
15719 /* The name is already allocated along with this objfile, so
15720 we don't need to duplicate it for the type. */
15721 TYPE_TAG_NAME (type
) = name
;
15722 if (die
->tag
== DW_TAG_class_type
)
15723 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
15727 if (die
->tag
== DW_TAG_structure_type
)
15729 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15731 else if (die
->tag
== DW_TAG_union_type
)
15733 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15735 else if (die
->tag
== DW_TAG_variant_part
)
15737 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15738 TYPE_FLAG_DISCRIMINATED_UNION (type
) = 1;
15742 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15745 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
15746 TYPE_DECLARED_CLASS (type
) = 1;
15748 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15751 if (attr_form_is_constant (attr
))
15752 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15755 /* For the moment, dynamic type sizes are not supported
15756 by GDB's struct type. The actual size is determined
15757 on-demand when resolving the type of a given object,
15758 so set the type's length to zero for now. Otherwise,
15759 we record an expression as the length, and that expression
15760 could lead to a very large value, which could eventually
15761 lead to us trying to allocate that much memory when creating
15762 a value of that type. */
15763 TYPE_LENGTH (type
) = 0;
15768 TYPE_LENGTH (type
) = 0;
15771 maybe_set_alignment (cu
, die
, type
);
15773 if (producer_is_icc_lt_14 (cu
) && (TYPE_LENGTH (type
) == 0))
15775 /* ICC<14 does not output the required DW_AT_declaration on
15776 incomplete types, but gives them a size of zero. */
15777 TYPE_STUB (type
) = 1;
15780 TYPE_STUB_SUPPORTED (type
) = 1;
15782 if (die_is_declaration (die
, cu
))
15783 TYPE_STUB (type
) = 1;
15784 else if (attr
== NULL
&& die
->child
== NULL
15785 && producer_is_realview (cu
->producer
))
15786 /* RealView does not output the required DW_AT_declaration
15787 on incomplete types. */
15788 TYPE_STUB (type
) = 1;
15790 /* We need to add the type field to the die immediately so we don't
15791 infinitely recurse when dealing with pointers to the structure
15792 type within the structure itself. */
15793 set_die_type (die
, type
, cu
);
15795 /* set_die_type should be already done. */
15796 set_descriptive_type (type
, die
, cu
);
15801 /* A helper for process_structure_scope that handles a single member
15805 handle_struct_member_die (struct die_info
*child_die
, struct type
*type
,
15806 struct field_info
*fi
,
15807 std::vector
<struct symbol
*> *template_args
,
15808 struct dwarf2_cu
*cu
)
15810 if (child_die
->tag
== DW_TAG_member
15811 || child_die
->tag
== DW_TAG_variable
15812 || child_die
->tag
== DW_TAG_variant_part
)
15814 /* NOTE: carlton/2002-11-05: A C++ static data member
15815 should be a DW_TAG_member that is a declaration, but
15816 all versions of G++ as of this writing (so through at
15817 least 3.2.1) incorrectly generate DW_TAG_variable
15818 tags for them instead. */
15819 dwarf2_add_field (fi
, child_die
, cu
);
15821 else if (child_die
->tag
== DW_TAG_subprogram
)
15823 /* Rust doesn't have member functions in the C++ sense.
15824 However, it does emit ordinary functions as children
15825 of a struct DIE. */
15826 if (cu
->language
== language_rust
)
15827 read_func_scope (child_die
, cu
);
15830 /* C++ member function. */
15831 dwarf2_add_member_fn (fi
, child_die
, type
, cu
);
15834 else if (child_die
->tag
== DW_TAG_inheritance
)
15836 /* C++ base class field. */
15837 dwarf2_add_field (fi
, child_die
, cu
);
15839 else if (type_can_define_types (child_die
))
15840 dwarf2_add_type_defn (fi
, child_die
, cu
);
15841 else if (child_die
->tag
== DW_TAG_template_type_param
15842 || child_die
->tag
== DW_TAG_template_value_param
)
15844 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
15847 template_args
->push_back (arg
);
15849 else if (child_die
->tag
== DW_TAG_variant
)
15851 /* In a variant we want to get the discriminant and also add a
15852 field for our sole member child. */
15853 struct attribute
*discr
= dwarf2_attr (child_die
, DW_AT_discr_value
, cu
);
15855 for (struct die_info
*variant_child
= child_die
->child
;
15856 variant_child
!= NULL
;
15857 variant_child
= sibling_die (variant_child
))
15859 if (variant_child
->tag
== DW_TAG_member
)
15861 handle_struct_member_die (variant_child
, type
, fi
,
15862 template_args
, cu
);
15863 /* Only handle the one. */
15868 /* We don't handle this but we might as well report it if we see
15870 if (dwarf2_attr (child_die
, DW_AT_discr_list
, cu
) != nullptr)
15871 complaint (&symfile_complaints
,
15872 _("DW_AT_discr_list is not supported yet"
15873 " - DIE at %s [in module %s]"),
15874 sect_offset_str (child_die
->sect_off
),
15875 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15877 /* The first field was just added, so we can stash the
15878 discriminant there. */
15879 gdb_assert (!fi
->fields
.empty ());
15881 fi
->fields
.back ().variant
.default_branch
= true;
15883 fi
->fields
.back ().variant
.discriminant_value
= DW_UNSND (discr
);
15887 /* Finish creating a structure or union type, including filling in
15888 its members and creating a symbol for it. */
15891 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
15893 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15894 struct die_info
*child_die
;
15897 type
= get_die_type (die
, cu
);
15899 type
= read_structure_type (die
, cu
);
15901 /* When reading a DW_TAG_variant_part, we need to notice when we
15902 read the discriminant member, so we can record it later in the
15903 discriminant_info. */
15904 bool is_variant_part
= TYPE_FLAG_DISCRIMINATED_UNION (type
);
15905 sect_offset discr_offset
;
15907 if (is_variant_part
)
15909 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr
, cu
);
15912 /* Maybe it's a univariant form, an extension we support.
15913 In this case arrange not to check the offset. */
15914 is_variant_part
= false;
15916 else if (attr_form_is_ref (discr
))
15918 struct dwarf2_cu
*target_cu
= cu
;
15919 struct die_info
*target_die
= follow_die_ref (die
, discr
, &target_cu
);
15921 discr_offset
= target_die
->sect_off
;
15925 complaint (&symfile_complaints
,
15926 _("DW_AT_discr does not have DIE reference form"
15927 " - DIE at %s [in module %s]"),
15928 sect_offset_str (die
->sect_off
),
15929 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15930 is_variant_part
= false;
15934 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
15936 struct field_info fi
;
15937 std::vector
<struct symbol
*> template_args
;
15939 child_die
= die
->child
;
15941 while (child_die
&& child_die
->tag
)
15943 handle_struct_member_die (child_die
, type
, &fi
, &template_args
, cu
);
15945 if (is_variant_part
&& discr_offset
== child_die
->sect_off
)
15946 fi
.fields
.back ().variant
.is_discriminant
= true;
15948 child_die
= sibling_die (child_die
);
15951 /* Attach template arguments to type. */
15952 if (!template_args
.empty ())
15954 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15955 TYPE_N_TEMPLATE_ARGUMENTS (type
) = template_args
.size ();
15956 TYPE_TEMPLATE_ARGUMENTS (type
)
15957 = XOBNEWVEC (&objfile
->objfile_obstack
,
15959 TYPE_N_TEMPLATE_ARGUMENTS (type
));
15960 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
15961 template_args
.data (),
15962 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
15963 * sizeof (struct symbol
*)));
15966 /* Attach fields and member functions to the type. */
15968 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
15969 if (!fi
.fnfieldlists
.empty ())
15971 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
15973 /* Get the type which refers to the base class (possibly this
15974 class itself) which contains the vtable pointer for the current
15975 class from the DW_AT_containing_type attribute. This use of
15976 DW_AT_containing_type is a GNU extension. */
15978 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15980 struct type
*t
= die_containing_type (die
, cu
);
15982 set_type_vptr_basetype (type
, t
);
15987 /* Our own class provides vtbl ptr. */
15988 for (i
= TYPE_NFIELDS (t
) - 1;
15989 i
>= TYPE_N_BASECLASSES (t
);
15992 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
15994 if (is_vtable_name (fieldname
, cu
))
15996 set_type_vptr_fieldno (type
, i
);
16001 /* Complain if virtual function table field not found. */
16002 if (i
< TYPE_N_BASECLASSES (t
))
16003 complaint (&symfile_complaints
,
16004 _("virtual function table pointer "
16005 "not found when defining class '%s'"),
16006 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
16011 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
16014 else if (cu
->producer
16015 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
16017 /* The IBM XLC compiler does not provide direct indication
16018 of the containing type, but the vtable pointer is
16019 always named __vfp. */
16023 for (i
= TYPE_NFIELDS (type
) - 1;
16024 i
>= TYPE_N_BASECLASSES (type
);
16027 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
16029 set_type_vptr_fieldno (type
, i
);
16030 set_type_vptr_basetype (type
, type
);
16037 /* Copy fi.typedef_field_list linked list elements content into the
16038 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
16039 if (!fi
.typedef_field_list
.empty ())
16041 int count
= fi
.typedef_field_list
.size ();
16043 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16044 TYPE_TYPEDEF_FIELD_ARRAY (type
)
16045 = ((struct decl_field
*)
16047 sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * count
));
16048 TYPE_TYPEDEF_FIELD_COUNT (type
) = count
;
16050 for (int i
= 0; i
< fi
.typedef_field_list
.size (); ++i
)
16051 TYPE_TYPEDEF_FIELD (type
, i
) = fi
.typedef_field_list
[i
];
16054 /* Copy fi.nested_types_list linked list elements content into the
16055 allocated array TYPE_NESTED_TYPES_ARRAY (type). */
16056 if (!fi
.nested_types_list
.empty () && cu
->language
!= language_ada
)
16058 int count
= fi
.nested_types_list
.size ();
16060 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16061 TYPE_NESTED_TYPES_ARRAY (type
)
16062 = ((struct decl_field
*)
16063 TYPE_ALLOC (type
, sizeof (struct decl_field
) * count
));
16064 TYPE_NESTED_TYPES_COUNT (type
) = count
;
16066 for (int i
= 0; i
< fi
.nested_types_list
.size (); ++i
)
16067 TYPE_NESTED_TYPES_FIELD (type
, i
) = fi
.nested_types_list
[i
];
16071 quirk_gcc_member_function_pointer (type
, objfile
);
16072 if (cu
->language
== language_rust
&& die
->tag
== DW_TAG_union_type
)
16073 cu
->rust_unions
.push_back (type
);
16075 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
16076 snapshots) has been known to create a die giving a declaration
16077 for a class that has, as a child, a die giving a definition for a
16078 nested class. So we have to process our children even if the
16079 current die is a declaration. Normally, of course, a declaration
16080 won't have any children at all. */
16082 child_die
= die
->child
;
16084 while (child_die
!= NULL
&& child_die
->tag
)
16086 if (child_die
->tag
== DW_TAG_member
16087 || child_die
->tag
== DW_TAG_variable
16088 || child_die
->tag
== DW_TAG_inheritance
16089 || child_die
->tag
== DW_TAG_template_value_param
16090 || child_die
->tag
== DW_TAG_template_type_param
)
16095 process_die (child_die
, cu
);
16097 child_die
= sibling_die (child_die
);
16100 /* Do not consider external references. According to the DWARF standard,
16101 these DIEs are identified by the fact that they have no byte_size
16102 attribute, and a declaration attribute. */
16103 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
16104 || !die_is_declaration (die
, cu
))
16105 new_symbol (die
, type
, cu
);
16108 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
16109 update TYPE using some information only available in DIE's children. */
16112 update_enumeration_type_from_children (struct die_info
*die
,
16114 struct dwarf2_cu
*cu
)
16116 struct die_info
*child_die
;
16117 int unsigned_enum
= 1;
16121 auto_obstack obstack
;
16123 for (child_die
= die
->child
;
16124 child_die
!= NULL
&& child_die
->tag
;
16125 child_die
= sibling_die (child_die
))
16127 struct attribute
*attr
;
16129 const gdb_byte
*bytes
;
16130 struct dwarf2_locexpr_baton
*baton
;
16133 if (child_die
->tag
!= DW_TAG_enumerator
)
16136 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
16140 name
= dwarf2_name (child_die
, cu
);
16142 name
= "<anonymous enumerator>";
16144 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
16145 &value
, &bytes
, &baton
);
16151 else if ((mask
& value
) != 0)
16156 /* If we already know that the enum type is neither unsigned, nor
16157 a flag type, no need to look at the rest of the enumerates. */
16158 if (!unsigned_enum
&& !flag_enum
)
16163 TYPE_UNSIGNED (type
) = 1;
16165 TYPE_FLAG_ENUM (type
) = 1;
16168 /* Given a DW_AT_enumeration_type die, set its type. We do not
16169 complete the type's fields yet, or create any symbols. */
16171 static struct type
*
16172 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16174 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16176 struct attribute
*attr
;
16179 /* If the definition of this type lives in .debug_types, read that type.
16180 Don't follow DW_AT_specification though, that will take us back up
16181 the chain and we want to go down. */
16182 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
16185 type
= get_DW_AT_signature_type (die
, attr
, cu
);
16187 /* The type's CU may not be the same as CU.
16188 Ensure TYPE is recorded with CU in die_type_hash. */
16189 return set_die_type (die
, type
, cu
);
16192 type
= alloc_type (objfile
);
16194 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
16195 name
= dwarf2_full_name (NULL
, die
, cu
);
16197 TYPE_TAG_NAME (type
) = name
;
16199 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
16202 struct type
*underlying_type
= die_type (die
, cu
);
16204 TYPE_TARGET_TYPE (type
) = underlying_type
;
16207 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16210 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16214 TYPE_LENGTH (type
) = 0;
16217 maybe_set_alignment (cu
, die
, type
);
16219 /* The enumeration DIE can be incomplete. In Ada, any type can be
16220 declared as private in the package spec, and then defined only
16221 inside the package body. Such types are known as Taft Amendment
16222 Types. When another package uses such a type, an incomplete DIE
16223 may be generated by the compiler. */
16224 if (die_is_declaration (die
, cu
))
16225 TYPE_STUB (type
) = 1;
16227 /* Finish the creation of this type by using the enum's children.
16228 We must call this even when the underlying type has been provided
16229 so that we can determine if we're looking at a "flag" enum. */
16230 update_enumeration_type_from_children (die
, type
, cu
);
16232 /* If this type has an underlying type that is not a stub, then we
16233 may use its attributes. We always use the "unsigned" attribute
16234 in this situation, because ordinarily we guess whether the type
16235 is unsigned -- but the guess can be wrong and the underlying type
16236 can tell us the reality. However, we defer to a local size
16237 attribute if one exists, because this lets the compiler override
16238 the underlying type if needed. */
16239 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
16241 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
16242 if (TYPE_LENGTH (type
) == 0)
16243 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
16244 if (TYPE_RAW_ALIGN (type
) == 0
16245 && TYPE_RAW_ALIGN (TYPE_TARGET_TYPE (type
)) != 0)
16246 set_type_align (type
, TYPE_RAW_ALIGN (TYPE_TARGET_TYPE (type
)));
16249 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
16251 return set_die_type (die
, type
, cu
);
16254 /* Given a pointer to a die which begins an enumeration, process all
16255 the dies that define the members of the enumeration, and create the
16256 symbol for the enumeration type.
16258 NOTE: We reverse the order of the element list. */
16261 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
16263 struct type
*this_type
;
16265 this_type
= get_die_type (die
, cu
);
16266 if (this_type
== NULL
)
16267 this_type
= read_enumeration_type (die
, cu
);
16269 if (die
->child
!= NULL
)
16271 struct die_info
*child_die
;
16272 struct symbol
*sym
;
16273 struct field
*fields
= NULL
;
16274 int num_fields
= 0;
16277 child_die
= die
->child
;
16278 while (child_die
&& child_die
->tag
)
16280 if (child_die
->tag
!= DW_TAG_enumerator
)
16282 process_die (child_die
, cu
);
16286 name
= dwarf2_name (child_die
, cu
);
16289 sym
= new_symbol (child_die
, this_type
, cu
);
16291 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
16293 fields
= (struct field
*)
16295 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
16296 * sizeof (struct field
));
16299 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
16300 FIELD_TYPE (fields
[num_fields
]) = NULL
;
16301 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
16302 FIELD_BITSIZE (fields
[num_fields
]) = 0;
16308 child_die
= sibling_die (child_die
);
16313 TYPE_NFIELDS (this_type
) = num_fields
;
16314 TYPE_FIELDS (this_type
) = (struct field
*)
16315 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
16316 memcpy (TYPE_FIELDS (this_type
), fields
,
16317 sizeof (struct field
) * num_fields
);
16322 /* If we are reading an enum from a .debug_types unit, and the enum
16323 is a declaration, and the enum is not the signatured type in the
16324 unit, then we do not want to add a symbol for it. Adding a
16325 symbol would in some cases obscure the true definition of the
16326 enum, giving users an incomplete type when the definition is
16327 actually available. Note that we do not want to do this for all
16328 enums which are just declarations, because C++0x allows forward
16329 enum declarations. */
16330 if (cu
->per_cu
->is_debug_types
16331 && die_is_declaration (die
, cu
))
16333 struct signatured_type
*sig_type
;
16335 sig_type
= (struct signatured_type
*) cu
->per_cu
;
16336 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
16337 if (sig_type
->type_offset_in_section
!= die
->sect_off
)
16341 new_symbol (die
, this_type
, cu
);
16344 /* Extract all information from a DW_TAG_array_type DIE and put it in
16345 the DIE's type field. For now, this only handles one dimensional
16348 static struct type
*
16349 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16351 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16352 struct die_info
*child_die
;
16354 struct type
*element_type
, *range_type
, *index_type
;
16355 struct attribute
*attr
;
16357 struct dynamic_prop
*byte_stride_prop
= NULL
;
16358 unsigned int bit_stride
= 0;
16360 element_type
= die_type (die
, cu
);
16362 /* The die_type call above may have already set the type for this DIE. */
16363 type
= get_die_type (die
, cu
);
16367 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
16373 = (struct dynamic_prop
*) alloca (sizeof (struct dynamic_prop
));
16374 stride_ok
= attr_to_dynamic_prop (attr
, die
, cu
, byte_stride_prop
);
16377 complaint (&symfile_complaints
,
16378 _("unable to read array DW_AT_byte_stride "
16379 " - DIE at %s [in module %s]"),
16380 sect_offset_str (die
->sect_off
),
16381 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16382 /* Ignore this attribute. We will likely not be able to print
16383 arrays of this type correctly, but there is little we can do
16384 to help if we cannot read the attribute's value. */
16385 byte_stride_prop
= NULL
;
16389 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
16391 bit_stride
= DW_UNSND (attr
);
16393 /* Irix 6.2 native cc creates array types without children for
16394 arrays with unspecified length. */
16395 if (die
->child
== NULL
)
16397 index_type
= objfile_type (objfile
)->builtin_int
;
16398 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
16399 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
16400 byte_stride_prop
, bit_stride
);
16401 return set_die_type (die
, type
, cu
);
16404 std::vector
<struct type
*> range_types
;
16405 child_die
= die
->child
;
16406 while (child_die
&& child_die
->tag
)
16408 if (child_die
->tag
== DW_TAG_subrange_type
)
16410 struct type
*child_type
= read_type_die (child_die
, cu
);
16412 if (child_type
!= NULL
)
16414 /* The range type was succesfully read. Save it for the
16415 array type creation. */
16416 range_types
.push_back (child_type
);
16419 child_die
= sibling_die (child_die
);
16422 /* Dwarf2 dimensions are output from left to right, create the
16423 necessary array types in backwards order. */
16425 type
= element_type
;
16427 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
16431 while (i
< range_types
.size ())
16432 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
16433 byte_stride_prop
, bit_stride
);
16437 size_t ndim
= range_types
.size ();
16439 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
16440 byte_stride_prop
, bit_stride
);
16443 /* Understand Dwarf2 support for vector types (like they occur on
16444 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
16445 array type. This is not part of the Dwarf2/3 standard yet, but a
16446 custom vendor extension. The main difference between a regular
16447 array and the vector variant is that vectors are passed by value
16449 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
16451 make_vector_type (type
);
16453 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
16454 implementation may choose to implement triple vectors using this
16456 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16459 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
16460 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16462 complaint (&symfile_complaints
,
16463 _("DW_AT_byte_size for array type smaller "
16464 "than the total size of elements"));
16467 name
= dwarf2_name (die
, cu
);
16469 TYPE_NAME (type
) = name
;
16471 maybe_set_alignment (cu
, die
, type
);
16473 /* Install the type in the die. */
16474 set_die_type (die
, type
, cu
);
16476 /* set_die_type should be already done. */
16477 set_descriptive_type (type
, die
, cu
);
16482 static enum dwarf_array_dim_ordering
16483 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
16485 struct attribute
*attr
;
16487 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
16490 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
16492 /* GNU F77 is a special case, as at 08/2004 array type info is the
16493 opposite order to the dwarf2 specification, but data is still
16494 laid out as per normal fortran.
16496 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
16497 version checking. */
16499 if (cu
->language
== language_fortran
16500 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
16502 return DW_ORD_row_major
;
16505 switch (cu
->language_defn
->la_array_ordering
)
16507 case array_column_major
:
16508 return DW_ORD_col_major
;
16509 case array_row_major
:
16511 return DW_ORD_row_major
;
16515 /* Extract all information from a DW_TAG_set_type DIE and put it in
16516 the DIE's type field. */
16518 static struct type
*
16519 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16521 struct type
*domain_type
, *set_type
;
16522 struct attribute
*attr
;
16524 domain_type
= die_type (die
, cu
);
16526 /* The die_type call above may have already set the type for this DIE. */
16527 set_type
= get_die_type (die
, cu
);
16531 set_type
= create_set_type (NULL
, domain_type
);
16533 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16535 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
16537 maybe_set_alignment (cu
, die
, set_type
);
16539 return set_die_type (die
, set_type
, cu
);
16542 /* A helper for read_common_block that creates a locexpr baton.
16543 SYM is the symbol which we are marking as computed.
16544 COMMON_DIE is the DIE for the common block.
16545 COMMON_LOC is the location expression attribute for the common
16547 MEMBER_LOC is the location expression attribute for the particular
16548 member of the common block that we are processing.
16549 CU is the CU from which the above come. */
16552 mark_common_block_symbol_computed (struct symbol
*sym
,
16553 struct die_info
*common_die
,
16554 struct attribute
*common_loc
,
16555 struct attribute
*member_loc
,
16556 struct dwarf2_cu
*cu
)
16558 struct dwarf2_per_objfile
*dwarf2_per_objfile
16559 = cu
->per_cu
->dwarf2_per_objfile
;
16560 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16561 struct dwarf2_locexpr_baton
*baton
;
16563 unsigned int cu_off
;
16564 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
16565 LONGEST offset
= 0;
16567 gdb_assert (common_loc
&& member_loc
);
16568 gdb_assert (attr_form_is_block (common_loc
));
16569 gdb_assert (attr_form_is_block (member_loc
)
16570 || attr_form_is_constant (member_loc
));
16572 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
16573 baton
->per_cu
= cu
->per_cu
;
16574 gdb_assert (baton
->per_cu
);
16576 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
16578 if (attr_form_is_constant (member_loc
))
16580 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
16581 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
16584 baton
->size
+= DW_BLOCK (member_loc
)->size
;
16586 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
16589 *ptr
++ = DW_OP_call4
;
16590 cu_off
= common_die
->sect_off
- cu
->per_cu
->sect_off
;
16591 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
16594 if (attr_form_is_constant (member_loc
))
16596 *ptr
++ = DW_OP_addr
;
16597 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
16598 ptr
+= cu
->header
.addr_size
;
16602 /* We have to copy the data here, because DW_OP_call4 will only
16603 use a DW_AT_location attribute. */
16604 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
16605 ptr
+= DW_BLOCK (member_loc
)->size
;
16608 *ptr
++ = DW_OP_plus
;
16609 gdb_assert (ptr
- baton
->data
== baton
->size
);
16611 SYMBOL_LOCATION_BATON (sym
) = baton
;
16612 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
16615 /* Create appropriate locally-scoped variables for all the
16616 DW_TAG_common_block entries. Also create a struct common_block
16617 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
16618 is used to sepate the common blocks name namespace from regular
16622 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
16624 struct attribute
*attr
;
16626 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
16629 /* Support the .debug_loc offsets. */
16630 if (attr_form_is_block (attr
))
16634 else if (attr_form_is_section_offset (attr
))
16636 dwarf2_complex_location_expr_complaint ();
16641 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
16642 "common block member");
16647 if (die
->child
!= NULL
)
16649 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16650 struct die_info
*child_die
;
16651 size_t n_entries
= 0, size
;
16652 struct common_block
*common_block
;
16653 struct symbol
*sym
;
16655 for (child_die
= die
->child
;
16656 child_die
&& child_die
->tag
;
16657 child_die
= sibling_die (child_die
))
16660 size
= (sizeof (struct common_block
)
16661 + (n_entries
- 1) * sizeof (struct symbol
*));
16663 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
16665 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
16666 common_block
->n_entries
= 0;
16668 for (child_die
= die
->child
;
16669 child_die
&& child_die
->tag
;
16670 child_die
= sibling_die (child_die
))
16672 /* Create the symbol in the DW_TAG_common_block block in the current
16674 sym
= new_symbol (child_die
, NULL
, cu
);
16677 struct attribute
*member_loc
;
16679 common_block
->contents
[common_block
->n_entries
++] = sym
;
16681 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
16685 /* GDB has handled this for a long time, but it is
16686 not specified by DWARF. It seems to have been
16687 emitted by gfortran at least as recently as:
16688 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
16689 complaint (&symfile_complaints
,
16690 _("Variable in common block has "
16691 "DW_AT_data_member_location "
16692 "- DIE at %s [in module %s]"),
16693 sect_offset_str (child_die
->sect_off
),
16694 objfile_name (objfile
));
16696 if (attr_form_is_section_offset (member_loc
))
16697 dwarf2_complex_location_expr_complaint ();
16698 else if (attr_form_is_constant (member_loc
)
16699 || attr_form_is_block (member_loc
))
16702 mark_common_block_symbol_computed (sym
, die
, attr
,
16706 dwarf2_complex_location_expr_complaint ();
16711 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
16712 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
16716 /* Create a type for a C++ namespace. */
16718 static struct type
*
16719 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16721 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16722 const char *previous_prefix
, *name
;
16726 /* For extensions, reuse the type of the original namespace. */
16727 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
16729 struct die_info
*ext_die
;
16730 struct dwarf2_cu
*ext_cu
= cu
;
16732 ext_die
= dwarf2_extension (die
, &ext_cu
);
16733 type
= read_type_die (ext_die
, ext_cu
);
16735 /* EXT_CU may not be the same as CU.
16736 Ensure TYPE is recorded with CU in die_type_hash. */
16737 return set_die_type (die
, type
, cu
);
16740 name
= namespace_name (die
, &is_anonymous
, cu
);
16742 /* Now build the name of the current namespace. */
16744 previous_prefix
= determine_prefix (die
, cu
);
16745 if (previous_prefix
[0] != '\0')
16746 name
= typename_concat (&objfile
->objfile_obstack
,
16747 previous_prefix
, name
, 0, cu
);
16749 /* Create the type. */
16750 type
= init_type (objfile
, TYPE_CODE_NAMESPACE
, 0, name
);
16751 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
16753 return set_die_type (die
, type
, cu
);
16756 /* Read a namespace scope. */
16759 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
16761 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16764 /* Add a symbol associated to this if we haven't seen the namespace
16765 before. Also, add a using directive if it's an anonymous
16768 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
16772 type
= read_type_die (die
, cu
);
16773 new_symbol (die
, type
, cu
);
16775 namespace_name (die
, &is_anonymous
, cu
);
16778 const char *previous_prefix
= determine_prefix (die
, cu
);
16780 std::vector
<const char *> excludes
;
16781 add_using_directive (using_directives (cu
->language
),
16782 previous_prefix
, TYPE_NAME (type
), NULL
,
16783 NULL
, excludes
, 0, &objfile
->objfile_obstack
);
16787 if (die
->child
!= NULL
)
16789 struct die_info
*child_die
= die
->child
;
16791 while (child_die
&& child_die
->tag
)
16793 process_die (child_die
, cu
);
16794 child_die
= sibling_die (child_die
);
16799 /* Read a Fortran module as type. This DIE can be only a declaration used for
16800 imported module. Still we need that type as local Fortran "use ... only"
16801 declaration imports depend on the created type in determine_prefix. */
16803 static struct type
*
16804 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16806 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16807 const char *module_name
;
16810 module_name
= dwarf2_name (die
, cu
);
16812 complaint (&symfile_complaints
,
16813 _("DW_TAG_module has no name, offset %s"),
16814 sect_offset_str (die
->sect_off
));
16815 type
= init_type (objfile
, TYPE_CODE_MODULE
, 0, module_name
);
16817 /* determine_prefix uses TYPE_TAG_NAME. */
16818 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
16820 return set_die_type (die
, type
, cu
);
16823 /* Read a Fortran module. */
16826 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
16828 struct die_info
*child_die
= die
->child
;
16831 type
= read_type_die (die
, cu
);
16832 new_symbol (die
, type
, cu
);
16834 while (child_die
&& child_die
->tag
)
16836 process_die (child_die
, cu
);
16837 child_die
= sibling_die (child_die
);
16841 /* Return the name of the namespace represented by DIE. Set
16842 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
16845 static const char *
16846 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
16848 struct die_info
*current_die
;
16849 const char *name
= NULL
;
16851 /* Loop through the extensions until we find a name. */
16853 for (current_die
= die
;
16854 current_die
!= NULL
;
16855 current_die
= dwarf2_extension (die
, &cu
))
16857 /* We don't use dwarf2_name here so that we can detect the absence
16858 of a name -> anonymous namespace. */
16859 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
16865 /* Is it an anonymous namespace? */
16867 *is_anonymous
= (name
== NULL
);
16869 name
= CP_ANONYMOUS_NAMESPACE_STR
;
16874 /* Extract all information from a DW_TAG_pointer_type DIE and add to
16875 the user defined type vector. */
16877 static struct type
*
16878 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16880 struct gdbarch
*gdbarch
16881 = get_objfile_arch (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
16882 struct comp_unit_head
*cu_header
= &cu
->header
;
16884 struct attribute
*attr_byte_size
;
16885 struct attribute
*attr_address_class
;
16886 int byte_size
, addr_class
;
16887 struct type
*target_type
;
16889 target_type
= die_type (die
, cu
);
16891 /* The die_type call above may have already set the type for this DIE. */
16892 type
= get_die_type (die
, cu
);
16896 type
= lookup_pointer_type (target_type
);
16898 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16899 if (attr_byte_size
)
16900 byte_size
= DW_UNSND (attr_byte_size
);
16902 byte_size
= cu_header
->addr_size
;
16904 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
16905 if (attr_address_class
)
16906 addr_class
= DW_UNSND (attr_address_class
);
16908 addr_class
= DW_ADDR_none
;
16910 ULONGEST alignment
= get_alignment (cu
, die
);
16912 /* If the pointer size, alignment, or address class is different
16913 than the default, create a type variant marked as such and set
16914 the length accordingly. */
16915 if (TYPE_LENGTH (type
) != byte_size
16916 || (alignment
!= 0 && TYPE_RAW_ALIGN (type
) != 0
16917 && alignment
!= TYPE_RAW_ALIGN (type
))
16918 || addr_class
!= DW_ADDR_none
)
16920 if (gdbarch_address_class_type_flags_p (gdbarch
))
16924 type_flags
= gdbarch_address_class_type_flags
16925 (gdbarch
, byte_size
, addr_class
);
16926 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
16928 type
= make_type_with_address_space (type
, type_flags
);
16930 else if (TYPE_LENGTH (type
) != byte_size
)
16932 complaint (&symfile_complaints
,
16933 _("invalid pointer size %d"), byte_size
);
16935 else if (TYPE_RAW_ALIGN (type
) != alignment
)
16937 complaint (&symfile_complaints
,
16938 _("Invalid DW_AT_alignment"
16939 " - DIE at %s [in module %s]"),
16940 sect_offset_str (die
->sect_off
),
16941 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16945 /* Should we also complain about unhandled address classes? */
16949 TYPE_LENGTH (type
) = byte_size
;
16950 set_type_align (type
, alignment
);
16951 return set_die_type (die
, type
, cu
);
16954 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
16955 the user defined type vector. */
16957 static struct type
*
16958 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16961 struct type
*to_type
;
16962 struct type
*domain
;
16964 to_type
= die_type (die
, cu
);
16965 domain
= die_containing_type (die
, cu
);
16967 /* The calls above may have already set the type for this DIE. */
16968 type
= get_die_type (die
, cu
);
16972 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
16973 type
= lookup_methodptr_type (to_type
);
16974 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
16976 struct type
*new_type
16977 = alloc_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
16979 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
16980 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
16981 TYPE_VARARGS (to_type
));
16982 type
= lookup_methodptr_type (new_type
);
16985 type
= lookup_memberptr_type (to_type
, domain
);
16987 return set_die_type (die
, type
, cu
);
16990 /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to
16991 the user defined type vector. */
16993 static struct type
*
16994 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
16995 enum type_code refcode
)
16997 struct comp_unit_head
*cu_header
= &cu
->header
;
16998 struct type
*type
, *target_type
;
16999 struct attribute
*attr
;
17001 gdb_assert (refcode
== TYPE_CODE_REF
|| refcode
== TYPE_CODE_RVALUE_REF
);
17003 target_type
= die_type (die
, cu
);
17005 /* The die_type call above may have already set the type for this DIE. */
17006 type
= get_die_type (die
, cu
);
17010 type
= lookup_reference_type (target_type
, refcode
);
17011 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17014 TYPE_LENGTH (type
) = DW_UNSND (attr
);
17018 TYPE_LENGTH (type
) = cu_header
->addr_size
;
17020 maybe_set_alignment (cu
, die
, type
);
17021 return set_die_type (die
, type
, cu
);
17024 /* Add the given cv-qualifiers to the element type of the array. GCC
17025 outputs DWARF type qualifiers that apply to an array, not the
17026 element type. But GDB relies on the array element type to carry
17027 the cv-qualifiers. This mimics section 6.7.3 of the C99
17030 static struct type
*
17031 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
17032 struct type
*base_type
, int cnst
, int voltl
)
17034 struct type
*el_type
, *inner_array
;
17036 base_type
= copy_type (base_type
);
17037 inner_array
= base_type
;
17039 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
17041 TYPE_TARGET_TYPE (inner_array
) =
17042 copy_type (TYPE_TARGET_TYPE (inner_array
));
17043 inner_array
= TYPE_TARGET_TYPE (inner_array
);
17046 el_type
= TYPE_TARGET_TYPE (inner_array
);
17047 cnst
|= TYPE_CONST (el_type
);
17048 voltl
|= TYPE_VOLATILE (el_type
);
17049 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
17051 return set_die_type (die
, base_type
, cu
);
17054 static struct type
*
17055 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17057 struct type
*base_type
, *cv_type
;
17059 base_type
= die_type (die
, cu
);
17061 /* The die_type call above may have already set the type for this DIE. */
17062 cv_type
= get_die_type (die
, cu
);
17066 /* In case the const qualifier is applied to an array type, the element type
17067 is so qualified, not the array type (section 6.7.3 of C99). */
17068 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
17069 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
17071 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
17072 return set_die_type (die
, cv_type
, cu
);
17075 static struct type
*
17076 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17078 struct type
*base_type
, *cv_type
;
17080 base_type
= die_type (die
, cu
);
17082 /* The die_type call above may have already set the type for this DIE. */
17083 cv_type
= get_die_type (die
, cu
);
17087 /* In case the volatile qualifier is applied to an array type, the
17088 element type is so qualified, not the array type (section 6.7.3
17090 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
17091 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
17093 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
17094 return set_die_type (die
, cv_type
, cu
);
17097 /* Handle DW_TAG_restrict_type. */
17099 static struct type
*
17100 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17102 struct type
*base_type
, *cv_type
;
17104 base_type
= die_type (die
, cu
);
17106 /* The die_type call above may have already set the type for this DIE. */
17107 cv_type
= get_die_type (die
, cu
);
17111 cv_type
= make_restrict_type (base_type
);
17112 return set_die_type (die
, cv_type
, cu
);
17115 /* Handle DW_TAG_atomic_type. */
17117 static struct type
*
17118 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17120 struct type
*base_type
, *cv_type
;
17122 base_type
= die_type (die
, cu
);
17124 /* The die_type call above may have already set the type for this DIE. */
17125 cv_type
= get_die_type (die
, cu
);
17129 cv_type
= make_atomic_type (base_type
);
17130 return set_die_type (die
, cv_type
, cu
);
17133 /* Extract all information from a DW_TAG_string_type DIE and add to
17134 the user defined type vector. It isn't really a user defined type,
17135 but it behaves like one, with other DIE's using an AT_user_def_type
17136 attribute to reference it. */
17138 static struct type
*
17139 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17141 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17142 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17143 struct type
*type
, *range_type
, *index_type
, *char_type
;
17144 struct attribute
*attr
;
17145 unsigned int length
;
17147 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
17150 length
= DW_UNSND (attr
);
17154 /* Check for the DW_AT_byte_size attribute. */
17155 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17158 length
= DW_UNSND (attr
);
17166 index_type
= objfile_type (objfile
)->builtin_int
;
17167 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
17168 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
17169 type
= create_string_type (NULL
, char_type
, range_type
);
17171 return set_die_type (die
, type
, cu
);
17174 /* Assuming that DIE corresponds to a function, returns nonzero
17175 if the function is prototyped. */
17178 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
17180 struct attribute
*attr
;
17182 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
17183 if (attr
&& (DW_UNSND (attr
) != 0))
17186 /* The DWARF standard implies that the DW_AT_prototyped attribute
17187 is only meaninful for C, but the concept also extends to other
17188 languages that allow unprototyped functions (Eg: Objective C).
17189 For all other languages, assume that functions are always
17191 if (cu
->language
!= language_c
17192 && cu
->language
!= language_objc
17193 && cu
->language
!= language_opencl
)
17196 /* RealView does not emit DW_AT_prototyped. We can not distinguish
17197 prototyped and unprototyped functions; default to prototyped,
17198 since that is more common in modern code (and RealView warns
17199 about unprototyped functions). */
17200 if (producer_is_realview (cu
->producer
))
17206 /* Handle DIES due to C code like:
17210 int (*funcp)(int a, long l);
17214 ('funcp' generates a DW_TAG_subroutine_type DIE). */
17216 static struct type
*
17217 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17219 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17220 struct type
*type
; /* Type that this function returns. */
17221 struct type
*ftype
; /* Function that returns above type. */
17222 struct attribute
*attr
;
17224 type
= die_type (die
, cu
);
17226 /* The die_type call above may have already set the type for this DIE. */
17227 ftype
= get_die_type (die
, cu
);
17231 ftype
= lookup_function_type (type
);
17233 if (prototyped_function_p (die
, cu
))
17234 TYPE_PROTOTYPED (ftype
) = 1;
17236 /* Store the calling convention in the type if it's available in
17237 the subroutine die. Otherwise set the calling convention to
17238 the default value DW_CC_normal. */
17239 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
17241 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
17242 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
17243 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
17245 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
17247 /* Record whether the function returns normally to its caller or not
17248 if the DWARF producer set that information. */
17249 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
17250 if (attr
&& (DW_UNSND (attr
) != 0))
17251 TYPE_NO_RETURN (ftype
) = 1;
17253 /* We need to add the subroutine type to the die immediately so
17254 we don't infinitely recurse when dealing with parameters
17255 declared as the same subroutine type. */
17256 set_die_type (die
, ftype
, cu
);
17258 if (die
->child
!= NULL
)
17260 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
17261 struct die_info
*child_die
;
17262 int nparams
, iparams
;
17264 /* Count the number of parameters.
17265 FIXME: GDB currently ignores vararg functions, but knows about
17266 vararg member functions. */
17268 child_die
= die
->child
;
17269 while (child_die
&& child_die
->tag
)
17271 if (child_die
->tag
== DW_TAG_formal_parameter
)
17273 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
17274 TYPE_VARARGS (ftype
) = 1;
17275 child_die
= sibling_die (child_die
);
17278 /* Allocate storage for parameters and fill them in. */
17279 TYPE_NFIELDS (ftype
) = nparams
;
17280 TYPE_FIELDS (ftype
) = (struct field
*)
17281 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
17283 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
17284 even if we error out during the parameters reading below. */
17285 for (iparams
= 0; iparams
< nparams
; iparams
++)
17286 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
17289 child_die
= die
->child
;
17290 while (child_die
&& child_die
->tag
)
17292 if (child_die
->tag
== DW_TAG_formal_parameter
)
17294 struct type
*arg_type
;
17296 /* DWARF version 2 has no clean way to discern C++
17297 static and non-static member functions. G++ helps
17298 GDB by marking the first parameter for non-static
17299 member functions (which is the this pointer) as
17300 artificial. We pass this information to
17301 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
17303 DWARF version 3 added DW_AT_object_pointer, which GCC
17304 4.5 does not yet generate. */
17305 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
17307 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
17309 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
17310 arg_type
= die_type (child_die
, cu
);
17312 /* RealView does not mark THIS as const, which the testsuite
17313 expects. GCC marks THIS as const in method definitions,
17314 but not in the class specifications (GCC PR 43053). */
17315 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
17316 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
17319 struct dwarf2_cu
*arg_cu
= cu
;
17320 const char *name
= dwarf2_name (child_die
, cu
);
17322 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
17325 /* If the compiler emits this, use it. */
17326 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
17329 else if (name
&& strcmp (name
, "this") == 0)
17330 /* Function definitions will have the argument names. */
17332 else if (name
== NULL
&& iparams
== 0)
17333 /* Declarations may not have the names, so like
17334 elsewhere in GDB, assume an artificial first
17335 argument is "this". */
17339 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
17343 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
17346 child_die
= sibling_die (child_die
);
17353 static struct type
*
17354 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
17356 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17357 const char *name
= NULL
;
17358 struct type
*this_type
, *target_type
;
17360 name
= dwarf2_full_name (NULL
, die
, cu
);
17361 this_type
= init_type (objfile
, TYPE_CODE_TYPEDEF
, 0, name
);
17362 TYPE_TARGET_STUB (this_type
) = 1;
17363 set_die_type (die
, this_type
, cu
);
17364 target_type
= die_type (die
, cu
);
17365 if (target_type
!= this_type
)
17366 TYPE_TARGET_TYPE (this_type
) = target_type
;
17369 /* Self-referential typedefs are, it seems, not allowed by the DWARF
17370 spec and cause infinite loops in GDB. */
17371 complaint (&symfile_complaints
,
17372 _("Self-referential DW_TAG_typedef "
17373 "- DIE at %s [in module %s]"),
17374 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
17375 TYPE_TARGET_TYPE (this_type
) = NULL
;
17380 /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT
17381 (which may be different from NAME) to the architecture back-end to allow
17382 it to guess the correct format if necessary. */
17384 static struct type
*
17385 dwarf2_init_float_type (struct objfile
*objfile
, int bits
, const char *name
,
17386 const char *name_hint
)
17388 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17389 const struct floatformat
**format
;
17392 format
= gdbarch_floatformat_for_type (gdbarch
, name_hint
, bits
);
17394 type
= init_float_type (objfile
, bits
, name
, format
);
17396 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17401 /* Find a representation of a given base type and install
17402 it in the TYPE field of the die. */
17404 static struct type
*
17405 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17407 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17409 struct attribute
*attr
;
17410 int encoding
= 0, bits
= 0;
17413 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
17416 encoding
= DW_UNSND (attr
);
17418 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17421 bits
= DW_UNSND (attr
) * TARGET_CHAR_BIT
;
17423 name
= dwarf2_name (die
, cu
);
17426 complaint (&symfile_complaints
,
17427 _("DW_AT_name missing from DW_TAG_base_type"));
17432 case DW_ATE_address
:
17433 /* Turn DW_ATE_address into a void * pointer. */
17434 type
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
17435 type
= init_pointer_type (objfile
, bits
, name
, type
);
17437 case DW_ATE_boolean
:
17438 type
= init_boolean_type (objfile
, bits
, 1, name
);
17440 case DW_ATE_complex_float
:
17441 type
= dwarf2_init_float_type (objfile
, bits
/ 2, NULL
, name
);
17442 type
= init_complex_type (objfile
, name
, type
);
17444 case DW_ATE_decimal_float
:
17445 type
= init_decfloat_type (objfile
, bits
, name
);
17448 type
= dwarf2_init_float_type (objfile
, bits
, name
, name
);
17450 case DW_ATE_signed
:
17451 type
= init_integer_type (objfile
, bits
, 0, name
);
17453 case DW_ATE_unsigned
:
17454 if (cu
->language
== language_fortran
17456 && startswith (name
, "character("))
17457 type
= init_character_type (objfile
, bits
, 1, name
);
17459 type
= init_integer_type (objfile
, bits
, 1, name
);
17461 case DW_ATE_signed_char
:
17462 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17463 || cu
->language
== language_pascal
17464 || cu
->language
== language_fortran
)
17465 type
= init_character_type (objfile
, bits
, 0, name
);
17467 type
= init_integer_type (objfile
, bits
, 0, name
);
17469 case DW_ATE_unsigned_char
:
17470 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17471 || cu
->language
== language_pascal
17472 || cu
->language
== language_fortran
17473 || cu
->language
== language_rust
)
17474 type
= init_character_type (objfile
, bits
, 1, name
);
17476 type
= init_integer_type (objfile
, bits
, 1, name
);
17480 gdbarch
*arch
= get_objfile_arch (objfile
);
17483 type
= builtin_type (arch
)->builtin_char16
;
17484 else if (bits
== 32)
17485 type
= builtin_type (arch
)->builtin_char32
;
17488 complaint (&symfile_complaints
,
17489 _("unsupported DW_ATE_UTF bit size: '%d'"),
17491 type
= init_integer_type (objfile
, bits
, 1, name
);
17493 return set_die_type (die
, type
, cu
);
17498 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
17499 dwarf_type_encoding_name (encoding
));
17500 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17504 if (name
&& strcmp (name
, "char") == 0)
17505 TYPE_NOSIGN (type
) = 1;
17507 maybe_set_alignment (cu
, die
, type
);
17509 return set_die_type (die
, type
, cu
);
17512 /* Parse dwarf attribute if it's a block, reference or constant and put the
17513 resulting value of the attribute into struct bound_prop.
17514 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
17517 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
17518 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
)
17520 struct dwarf2_property_baton
*baton
;
17521 struct obstack
*obstack
17522 = &cu
->per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
;
17524 if (attr
== NULL
|| prop
== NULL
)
17527 if (attr_form_is_block (attr
))
17529 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17530 baton
->referenced_type
= NULL
;
17531 baton
->locexpr
.per_cu
= cu
->per_cu
;
17532 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
17533 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
17534 prop
->data
.baton
= baton
;
17535 prop
->kind
= PROP_LOCEXPR
;
17536 gdb_assert (prop
->data
.baton
!= NULL
);
17538 else if (attr_form_is_ref (attr
))
17540 struct dwarf2_cu
*target_cu
= cu
;
17541 struct die_info
*target_die
;
17542 struct attribute
*target_attr
;
17544 target_die
= follow_die_ref (die
, attr
, &target_cu
);
17545 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
17546 if (target_attr
== NULL
)
17547 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
17549 if (target_attr
== NULL
)
17552 switch (target_attr
->name
)
17554 case DW_AT_location
:
17555 if (attr_form_is_section_offset (target_attr
))
17557 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17558 baton
->referenced_type
= die_type (target_die
, target_cu
);
17559 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
17560 prop
->data
.baton
= baton
;
17561 prop
->kind
= PROP_LOCLIST
;
17562 gdb_assert (prop
->data
.baton
!= NULL
);
17564 else if (attr_form_is_block (target_attr
))
17566 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17567 baton
->referenced_type
= die_type (target_die
, target_cu
);
17568 baton
->locexpr
.per_cu
= cu
->per_cu
;
17569 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
17570 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
17571 prop
->data
.baton
= baton
;
17572 prop
->kind
= PROP_LOCEXPR
;
17573 gdb_assert (prop
->data
.baton
!= NULL
);
17577 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
17578 "dynamic property");
17582 case DW_AT_data_member_location
:
17586 if (!handle_data_member_location (target_die
, target_cu
,
17590 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17591 baton
->referenced_type
= read_type_die (target_die
->parent
,
17593 baton
->offset_info
.offset
= offset
;
17594 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
17595 prop
->data
.baton
= baton
;
17596 prop
->kind
= PROP_ADDR_OFFSET
;
17601 else if (attr_form_is_constant (attr
))
17603 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
17604 prop
->kind
= PROP_CONST
;
17608 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
17609 dwarf2_name (die
, cu
));
17616 /* Read the given DW_AT_subrange DIE. */
17618 static struct type
*
17619 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17621 struct type
*base_type
, *orig_base_type
;
17622 struct type
*range_type
;
17623 struct attribute
*attr
;
17624 struct dynamic_prop low
, high
;
17625 int low_default_is_valid
;
17626 int high_bound_is_count
= 0;
17628 LONGEST negative_mask
;
17630 orig_base_type
= die_type (die
, cu
);
17631 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
17632 whereas the real type might be. So, we use ORIG_BASE_TYPE when
17633 creating the range type, but we use the result of check_typedef
17634 when examining properties of the type. */
17635 base_type
= check_typedef (orig_base_type
);
17637 /* The die_type call above may have already set the type for this DIE. */
17638 range_type
= get_die_type (die
, cu
);
17642 low
.kind
= PROP_CONST
;
17643 high
.kind
= PROP_CONST
;
17644 high
.data
.const_val
= 0;
17646 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
17647 omitting DW_AT_lower_bound. */
17648 switch (cu
->language
)
17651 case language_cplus
:
17652 low
.data
.const_val
= 0;
17653 low_default_is_valid
= 1;
17655 case language_fortran
:
17656 low
.data
.const_val
= 1;
17657 low_default_is_valid
= 1;
17660 case language_objc
:
17661 case language_rust
:
17662 low
.data
.const_val
= 0;
17663 low_default_is_valid
= (cu
->header
.version
>= 4);
17667 case language_pascal
:
17668 low
.data
.const_val
= 1;
17669 low_default_is_valid
= (cu
->header
.version
>= 4);
17672 low
.data
.const_val
= 0;
17673 low_default_is_valid
= 0;
17677 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
17679 attr_to_dynamic_prop (attr
, die
, cu
, &low
);
17680 else if (!low_default_is_valid
)
17681 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
17682 "- DIE at %s [in module %s]"),
17683 sect_offset_str (die
->sect_off
),
17684 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17686 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
17687 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
))
17689 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
17690 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
))
17692 /* If bounds are constant do the final calculation here. */
17693 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
17694 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
17696 high_bound_is_count
= 1;
17700 /* Dwarf-2 specifications explicitly allows to create subrange types
17701 without specifying a base type.
17702 In that case, the base type must be set to the type of
17703 the lower bound, upper bound or count, in that order, if any of these
17704 three attributes references an object that has a type.
17705 If no base type is found, the Dwarf-2 specifications say that
17706 a signed integer type of size equal to the size of an address should
17708 For the following C code: `extern char gdb_int [];'
17709 GCC produces an empty range DIE.
17710 FIXME: muller/2010-05-28: Possible references to object for low bound,
17711 high bound or count are not yet handled by this code. */
17712 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
17714 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17715 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17716 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
17717 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
17719 /* Test "int", "long int", and "long long int" objfile types,
17720 and select the first one having a size above or equal to the
17721 architecture address size. */
17722 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
17723 base_type
= int_type
;
17726 int_type
= objfile_type (objfile
)->builtin_long
;
17727 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
17728 base_type
= int_type
;
17731 int_type
= objfile_type (objfile
)->builtin_long_long
;
17732 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
17733 base_type
= int_type
;
17738 /* Normally, the DWARF producers are expected to use a signed
17739 constant form (Eg. DW_FORM_sdata) to express negative bounds.
17740 But this is unfortunately not always the case, as witnessed
17741 with GCC, for instance, where the ambiguous DW_FORM_dataN form
17742 is used instead. To work around that ambiguity, we treat
17743 the bounds as signed, and thus sign-extend their values, when
17744 the base type is signed. */
17746 -((LONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
17747 if (low
.kind
== PROP_CONST
17748 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
17749 low
.data
.const_val
|= negative_mask
;
17750 if (high
.kind
== PROP_CONST
17751 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
17752 high
.data
.const_val
|= negative_mask
;
17754 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
);
17756 if (high_bound_is_count
)
17757 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
17759 /* Ada expects an empty array on no boundary attributes. */
17760 if (attr
== NULL
&& cu
->language
!= language_ada
)
17761 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
17763 name
= dwarf2_name (die
, cu
);
17765 TYPE_NAME (range_type
) = name
;
17767 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17769 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
17771 maybe_set_alignment (cu
, die
, range_type
);
17773 set_die_type (die
, range_type
, cu
);
17775 /* set_die_type should be already done. */
17776 set_descriptive_type (range_type
, die
, cu
);
17781 static struct type
*
17782 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17786 type
= init_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
, TYPE_CODE_VOID
,0,
17788 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
17790 /* In Ada, an unspecified type is typically used when the description
17791 of the type is defered to a different unit. When encountering
17792 such a type, we treat it as a stub, and try to resolve it later on,
17794 if (cu
->language
== language_ada
)
17795 TYPE_STUB (type
) = 1;
17797 return set_die_type (die
, type
, cu
);
17800 /* Read a single die and all its descendents. Set the die's sibling
17801 field to NULL; set other fields in the die correctly, and set all
17802 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
17803 location of the info_ptr after reading all of those dies. PARENT
17804 is the parent of the die in question. */
17806 static struct die_info
*
17807 read_die_and_children (const struct die_reader_specs
*reader
,
17808 const gdb_byte
*info_ptr
,
17809 const gdb_byte
**new_info_ptr
,
17810 struct die_info
*parent
)
17812 struct die_info
*die
;
17813 const gdb_byte
*cur_ptr
;
17816 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
17819 *new_info_ptr
= cur_ptr
;
17822 store_in_ref_table (die
, reader
->cu
);
17825 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
17829 *new_info_ptr
= cur_ptr
;
17832 die
->sibling
= NULL
;
17833 die
->parent
= parent
;
17837 /* Read a die, all of its descendents, and all of its siblings; set
17838 all of the fields of all of the dies correctly. Arguments are as
17839 in read_die_and_children. */
17841 static struct die_info
*
17842 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
17843 const gdb_byte
*info_ptr
,
17844 const gdb_byte
**new_info_ptr
,
17845 struct die_info
*parent
)
17847 struct die_info
*first_die
, *last_sibling
;
17848 const gdb_byte
*cur_ptr
;
17850 cur_ptr
= info_ptr
;
17851 first_die
= last_sibling
= NULL
;
17855 struct die_info
*die
17856 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
17860 *new_info_ptr
= cur_ptr
;
17867 last_sibling
->sibling
= die
;
17869 last_sibling
= die
;
17873 /* Read a die, all of its descendents, and all of its siblings; set
17874 all of the fields of all of the dies correctly. Arguments are as
17875 in read_die_and_children.
17876 This the main entry point for reading a DIE and all its children. */
17878 static struct die_info
*
17879 read_die_and_siblings (const struct die_reader_specs
*reader
,
17880 const gdb_byte
*info_ptr
,
17881 const gdb_byte
**new_info_ptr
,
17882 struct die_info
*parent
)
17884 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
17885 new_info_ptr
, parent
);
17887 if (dwarf_die_debug
)
17889 fprintf_unfiltered (gdb_stdlog
,
17890 "Read die from %s@0x%x of %s:\n",
17891 get_section_name (reader
->die_section
),
17892 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
17893 bfd_get_filename (reader
->abfd
));
17894 dump_die (die
, dwarf_die_debug
);
17900 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
17902 The caller is responsible for filling in the extra attributes
17903 and updating (*DIEP)->num_attrs.
17904 Set DIEP to point to a newly allocated die with its information,
17905 except for its child, sibling, and parent fields.
17906 Set HAS_CHILDREN to tell whether the die has children or not. */
17908 static const gdb_byte
*
17909 read_full_die_1 (const struct die_reader_specs
*reader
,
17910 struct die_info
**diep
, const gdb_byte
*info_ptr
,
17911 int *has_children
, int num_extra_attrs
)
17913 unsigned int abbrev_number
, bytes_read
, i
;
17914 struct abbrev_info
*abbrev
;
17915 struct die_info
*die
;
17916 struct dwarf2_cu
*cu
= reader
->cu
;
17917 bfd
*abfd
= reader
->abfd
;
17919 sect_offset sect_off
= (sect_offset
) (info_ptr
- reader
->buffer
);
17920 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
17921 info_ptr
+= bytes_read
;
17922 if (!abbrev_number
)
17929 abbrev
= reader
->abbrev_table
->lookup_abbrev (abbrev_number
);
17931 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
17933 bfd_get_filename (abfd
));
17935 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
17936 die
->sect_off
= sect_off
;
17937 die
->tag
= abbrev
->tag
;
17938 die
->abbrev
= abbrev_number
;
17940 /* Make the result usable.
17941 The caller needs to update num_attrs after adding the extra
17943 die
->num_attrs
= abbrev
->num_attrs
;
17945 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
17946 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
17950 *has_children
= abbrev
->has_children
;
17954 /* Read a die and all its attributes.
17955 Set DIEP to point to a newly allocated die with its information,
17956 except for its child, sibling, and parent fields.
17957 Set HAS_CHILDREN to tell whether the die has children or not. */
17959 static const gdb_byte
*
17960 read_full_die (const struct die_reader_specs
*reader
,
17961 struct die_info
**diep
, const gdb_byte
*info_ptr
,
17964 const gdb_byte
*result
;
17966 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
17968 if (dwarf_die_debug
)
17970 fprintf_unfiltered (gdb_stdlog
,
17971 "Read die from %s@0x%x of %s:\n",
17972 get_section_name (reader
->die_section
),
17973 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
17974 bfd_get_filename (reader
->abfd
));
17975 dump_die (*diep
, dwarf_die_debug
);
17981 /* Abbreviation tables.
17983 In DWARF version 2, the description of the debugging information is
17984 stored in a separate .debug_abbrev section. Before we read any
17985 dies from a section we read in all abbreviations and install them
17986 in a hash table. */
17988 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
17990 struct abbrev_info
*
17991 abbrev_table::alloc_abbrev ()
17993 struct abbrev_info
*abbrev
;
17995 abbrev
= XOBNEW (&abbrev_obstack
, struct abbrev_info
);
17996 memset (abbrev
, 0, sizeof (struct abbrev_info
));
18001 /* Add an abbreviation to the table. */
18004 abbrev_table::add_abbrev (unsigned int abbrev_number
,
18005 struct abbrev_info
*abbrev
)
18007 unsigned int hash_number
;
18009 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
18010 abbrev
->next
= m_abbrevs
[hash_number
];
18011 m_abbrevs
[hash_number
] = abbrev
;
18014 /* Look up an abbrev in the table.
18015 Returns NULL if the abbrev is not found. */
18017 struct abbrev_info
*
18018 abbrev_table::lookup_abbrev (unsigned int abbrev_number
)
18020 unsigned int hash_number
;
18021 struct abbrev_info
*abbrev
;
18023 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
18024 abbrev
= m_abbrevs
[hash_number
];
18028 if (abbrev
->number
== abbrev_number
)
18030 abbrev
= abbrev
->next
;
18035 /* Read in an abbrev table. */
18037 static abbrev_table_up
18038 abbrev_table_read_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
18039 struct dwarf2_section_info
*section
,
18040 sect_offset sect_off
)
18042 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18043 bfd
*abfd
= get_section_bfd_owner (section
);
18044 const gdb_byte
*abbrev_ptr
;
18045 struct abbrev_info
*cur_abbrev
;
18046 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
18047 unsigned int abbrev_form
;
18048 struct attr_abbrev
*cur_attrs
;
18049 unsigned int allocated_attrs
;
18051 abbrev_table_up
abbrev_table (new struct abbrev_table (sect_off
));
18053 dwarf2_read_section (objfile
, section
);
18054 abbrev_ptr
= section
->buffer
+ to_underlying (sect_off
);
18055 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18056 abbrev_ptr
+= bytes_read
;
18058 allocated_attrs
= ATTR_ALLOC_CHUNK
;
18059 cur_attrs
= XNEWVEC (struct attr_abbrev
, allocated_attrs
);
18061 /* Loop until we reach an abbrev number of 0. */
18062 while (abbrev_number
)
18064 cur_abbrev
= abbrev_table
->alloc_abbrev ();
18066 /* read in abbrev header */
18067 cur_abbrev
->number
= abbrev_number
;
18069 = (enum dwarf_tag
) read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18070 abbrev_ptr
+= bytes_read
;
18071 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
18074 /* now read in declarations */
18077 LONGEST implicit_const
;
18079 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18080 abbrev_ptr
+= bytes_read
;
18081 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18082 abbrev_ptr
+= bytes_read
;
18083 if (abbrev_form
== DW_FORM_implicit_const
)
18085 implicit_const
= read_signed_leb128 (abfd
, abbrev_ptr
,
18087 abbrev_ptr
+= bytes_read
;
18091 /* Initialize it due to a false compiler warning. */
18092 implicit_const
= -1;
18095 if (abbrev_name
== 0)
18098 if (cur_abbrev
->num_attrs
== allocated_attrs
)
18100 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
18102 = XRESIZEVEC (struct attr_abbrev
, cur_attrs
, allocated_attrs
);
18105 cur_attrs
[cur_abbrev
->num_attrs
].name
18106 = (enum dwarf_attribute
) abbrev_name
;
18107 cur_attrs
[cur_abbrev
->num_attrs
].form
18108 = (enum dwarf_form
) abbrev_form
;
18109 cur_attrs
[cur_abbrev
->num_attrs
].implicit_const
= implicit_const
;
18110 ++cur_abbrev
->num_attrs
;
18113 cur_abbrev
->attrs
=
18114 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct attr_abbrev
,
18115 cur_abbrev
->num_attrs
);
18116 memcpy (cur_abbrev
->attrs
, cur_attrs
,
18117 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
18119 abbrev_table
->add_abbrev (abbrev_number
, cur_abbrev
);
18121 /* Get next abbreviation.
18122 Under Irix6 the abbreviations for a compilation unit are not
18123 always properly terminated with an abbrev number of 0.
18124 Exit loop if we encounter an abbreviation which we have
18125 already read (which means we are about to read the abbreviations
18126 for the next compile unit) or if the end of the abbreviation
18127 table is reached. */
18128 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
18130 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18131 abbrev_ptr
+= bytes_read
;
18132 if (abbrev_table
->lookup_abbrev (abbrev_number
) != NULL
)
18137 return abbrev_table
;
18140 /* Returns nonzero if TAG represents a type that we might generate a partial
18144 is_type_tag_for_partial (int tag
)
18149 /* Some types that would be reasonable to generate partial symbols for,
18150 that we don't at present. */
18151 case DW_TAG_array_type
:
18152 case DW_TAG_file_type
:
18153 case DW_TAG_ptr_to_member_type
:
18154 case DW_TAG_set_type
:
18155 case DW_TAG_string_type
:
18156 case DW_TAG_subroutine_type
:
18158 case DW_TAG_base_type
:
18159 case DW_TAG_class_type
:
18160 case DW_TAG_interface_type
:
18161 case DW_TAG_enumeration_type
:
18162 case DW_TAG_structure_type
:
18163 case DW_TAG_subrange_type
:
18164 case DW_TAG_typedef
:
18165 case DW_TAG_union_type
:
18172 /* Load all DIEs that are interesting for partial symbols into memory. */
18174 static struct partial_die_info
*
18175 load_partial_dies (const struct die_reader_specs
*reader
,
18176 const gdb_byte
*info_ptr
, int building_psymtab
)
18178 struct dwarf2_cu
*cu
= reader
->cu
;
18179 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18180 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
18181 unsigned int bytes_read
;
18182 unsigned int load_all
= 0;
18183 int nesting_level
= 1;
18188 gdb_assert (cu
->per_cu
!= NULL
);
18189 if (cu
->per_cu
->load_all_dies
)
18193 = htab_create_alloc_ex (cu
->header
.length
/ 12,
18197 &cu
->comp_unit_obstack
,
18198 hashtab_obstack_allocate
,
18199 dummy_obstack_deallocate
);
18203 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
18205 /* A NULL abbrev means the end of a series of children. */
18206 if (abbrev
== NULL
)
18208 if (--nesting_level
== 0)
18211 info_ptr
+= bytes_read
;
18212 last_die
= parent_die
;
18213 parent_die
= parent_die
->die_parent
;
18217 /* Check for template arguments. We never save these; if
18218 they're seen, we just mark the parent, and go on our way. */
18219 if (parent_die
!= NULL
18220 && cu
->language
== language_cplus
18221 && (abbrev
->tag
== DW_TAG_template_type_param
18222 || abbrev
->tag
== DW_TAG_template_value_param
))
18224 parent_die
->has_template_arguments
= 1;
18228 /* We don't need a partial DIE for the template argument. */
18229 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18234 /* We only recurse into c++ subprograms looking for template arguments.
18235 Skip their other children. */
18237 && cu
->language
== language_cplus
18238 && parent_die
!= NULL
18239 && parent_die
->tag
== DW_TAG_subprogram
)
18241 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18245 /* Check whether this DIE is interesting enough to save. Normally
18246 we would not be interested in members here, but there may be
18247 later variables referencing them via DW_AT_specification (for
18248 static members). */
18250 && !is_type_tag_for_partial (abbrev
->tag
)
18251 && abbrev
->tag
!= DW_TAG_constant
18252 && abbrev
->tag
!= DW_TAG_enumerator
18253 && abbrev
->tag
!= DW_TAG_subprogram
18254 && abbrev
->tag
!= DW_TAG_inlined_subroutine
18255 && abbrev
->tag
!= DW_TAG_lexical_block
18256 && abbrev
->tag
!= DW_TAG_variable
18257 && abbrev
->tag
!= DW_TAG_namespace
18258 && abbrev
->tag
!= DW_TAG_module
18259 && abbrev
->tag
!= DW_TAG_member
18260 && abbrev
->tag
!= DW_TAG_imported_unit
18261 && abbrev
->tag
!= DW_TAG_imported_declaration
)
18263 /* Otherwise we skip to the next sibling, if any. */
18264 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18268 struct partial_die_info
pdi ((sect_offset
) (info_ptr
- reader
->buffer
),
18271 info_ptr
= pdi
.read (reader
, *abbrev
, info_ptr
+ bytes_read
);
18273 /* This two-pass algorithm for processing partial symbols has a
18274 high cost in cache pressure. Thus, handle some simple cases
18275 here which cover the majority of C partial symbols. DIEs
18276 which neither have specification tags in them, nor could have
18277 specification tags elsewhere pointing at them, can simply be
18278 processed and discarded.
18280 This segment is also optional; scan_partial_symbols and
18281 add_partial_symbol will handle these DIEs if we chain
18282 them in normally. When compilers which do not emit large
18283 quantities of duplicate debug information are more common,
18284 this code can probably be removed. */
18286 /* Any complete simple types at the top level (pretty much all
18287 of them, for a language without namespaces), can be processed
18289 if (parent_die
== NULL
18290 && pdi
.has_specification
== 0
18291 && pdi
.is_declaration
== 0
18292 && ((pdi
.tag
== DW_TAG_typedef
&& !pdi
.has_children
)
18293 || pdi
.tag
== DW_TAG_base_type
18294 || pdi
.tag
== DW_TAG_subrange_type
))
18296 if (building_psymtab
&& pdi
.name
!= NULL
)
18297 add_psymbol_to_list (pdi
.name
, strlen (pdi
.name
), 0,
18298 VAR_DOMAIN
, LOC_TYPEDEF
,
18299 &objfile
->static_psymbols
,
18300 0, cu
->language
, objfile
);
18301 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18305 /* The exception for DW_TAG_typedef with has_children above is
18306 a workaround of GCC PR debug/47510. In the case of this complaint
18307 type_name_no_tag_or_error will error on such types later.
18309 GDB skipped children of DW_TAG_typedef by the shortcut above and then
18310 it could not find the child DIEs referenced later, this is checked
18311 above. In correct DWARF DW_TAG_typedef should have no children. */
18313 if (pdi
.tag
== DW_TAG_typedef
&& pdi
.has_children
)
18314 complaint (&symfile_complaints
,
18315 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
18316 "- DIE at %s [in module %s]"),
18317 sect_offset_str (pdi
.sect_off
), objfile_name (objfile
));
18319 /* If we're at the second level, and we're an enumerator, and
18320 our parent has no specification (meaning possibly lives in a
18321 namespace elsewhere), then we can add the partial symbol now
18322 instead of queueing it. */
18323 if (pdi
.tag
== DW_TAG_enumerator
18324 && parent_die
!= NULL
18325 && parent_die
->die_parent
== NULL
18326 && parent_die
->tag
== DW_TAG_enumeration_type
18327 && parent_die
->has_specification
== 0)
18329 if (pdi
.name
== NULL
)
18330 complaint (&symfile_complaints
,
18331 _("malformed enumerator DIE ignored"));
18332 else if (building_psymtab
)
18333 add_psymbol_to_list (pdi
.name
, strlen (pdi
.name
), 0,
18334 VAR_DOMAIN
, LOC_CONST
,
18335 cu
->language
== language_cplus
18336 ? &objfile
->global_psymbols
18337 : &objfile
->static_psymbols
,
18338 0, cu
->language
, objfile
);
18340 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18344 struct partial_die_info
*part_die
18345 = new (&cu
->comp_unit_obstack
) partial_die_info (pdi
);
18347 /* We'll save this DIE so link it in. */
18348 part_die
->die_parent
= parent_die
;
18349 part_die
->die_sibling
= NULL
;
18350 part_die
->die_child
= NULL
;
18352 if (last_die
&& last_die
== parent_die
)
18353 last_die
->die_child
= part_die
;
18355 last_die
->die_sibling
= part_die
;
18357 last_die
= part_die
;
18359 if (first_die
== NULL
)
18360 first_die
= part_die
;
18362 /* Maybe add the DIE to the hash table. Not all DIEs that we
18363 find interesting need to be in the hash table, because we
18364 also have the parent/sibling/child chains; only those that we
18365 might refer to by offset later during partial symbol reading.
18367 For now this means things that might have be the target of a
18368 DW_AT_specification, DW_AT_abstract_origin, or
18369 DW_AT_extension. DW_AT_extension will refer only to
18370 namespaces; DW_AT_abstract_origin refers to functions (and
18371 many things under the function DIE, but we do not recurse
18372 into function DIEs during partial symbol reading) and
18373 possibly variables as well; DW_AT_specification refers to
18374 declarations. Declarations ought to have the DW_AT_declaration
18375 flag. It happens that GCC forgets to put it in sometimes, but
18376 only for functions, not for types.
18378 Adding more things than necessary to the hash table is harmless
18379 except for the performance cost. Adding too few will result in
18380 wasted time in find_partial_die, when we reread the compilation
18381 unit with load_all_dies set. */
18384 || abbrev
->tag
== DW_TAG_constant
18385 || abbrev
->tag
== DW_TAG_subprogram
18386 || abbrev
->tag
== DW_TAG_variable
18387 || abbrev
->tag
== DW_TAG_namespace
18388 || part_die
->is_declaration
)
18392 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
18393 to_underlying (part_die
->sect_off
),
18398 /* For some DIEs we want to follow their children (if any). For C
18399 we have no reason to follow the children of structures; for other
18400 languages we have to, so that we can get at method physnames
18401 to infer fully qualified class names, for DW_AT_specification,
18402 and for C++ template arguments. For C++, we also look one level
18403 inside functions to find template arguments (if the name of the
18404 function does not already contain the template arguments).
18406 For Ada, we need to scan the children of subprograms and lexical
18407 blocks as well because Ada allows the definition of nested
18408 entities that could be interesting for the debugger, such as
18409 nested subprograms for instance. */
18410 if (last_die
->has_children
18412 || last_die
->tag
== DW_TAG_namespace
18413 || last_die
->tag
== DW_TAG_module
18414 || last_die
->tag
== DW_TAG_enumeration_type
18415 || (cu
->language
== language_cplus
18416 && last_die
->tag
== DW_TAG_subprogram
18417 && (last_die
->name
== NULL
18418 || strchr (last_die
->name
, '<') == NULL
))
18419 || (cu
->language
!= language_c
18420 && (last_die
->tag
== DW_TAG_class_type
18421 || last_die
->tag
== DW_TAG_interface_type
18422 || last_die
->tag
== DW_TAG_structure_type
18423 || last_die
->tag
== DW_TAG_union_type
))
18424 || (cu
->language
== language_ada
18425 && (last_die
->tag
== DW_TAG_subprogram
18426 || last_die
->tag
== DW_TAG_lexical_block
))))
18429 parent_die
= last_die
;
18433 /* Otherwise we skip to the next sibling, if any. */
18434 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
18436 /* Back to the top, do it again. */
18440 partial_die_info::partial_die_info (sect_offset sect_off_
,
18441 struct abbrev_info
*abbrev
)
18442 : partial_die_info (sect_off_
, abbrev
->tag
, abbrev
->has_children
)
18446 /* Read a minimal amount of information into the minimal die structure.
18447 INFO_PTR should point just after the initial uleb128 of a DIE. */
18450 partial_die_info::read (const struct die_reader_specs
*reader
,
18451 const struct abbrev_info
&abbrev
, const gdb_byte
*info_ptr
)
18453 struct dwarf2_cu
*cu
= reader
->cu
;
18454 struct dwarf2_per_objfile
*dwarf2_per_objfile
18455 = cu
->per_cu
->dwarf2_per_objfile
;
18457 int has_low_pc_attr
= 0;
18458 int has_high_pc_attr
= 0;
18459 int high_pc_relative
= 0;
18461 for (i
= 0; i
< abbrev
.num_attrs
; ++i
)
18463 struct attribute attr
;
18465 info_ptr
= read_attribute (reader
, &attr
, &abbrev
.attrs
[i
], info_ptr
);
18467 /* Store the data if it is of an attribute we want to keep in a
18468 partial symbol table. */
18474 case DW_TAG_compile_unit
:
18475 case DW_TAG_partial_unit
:
18476 case DW_TAG_type_unit
:
18477 /* Compilation units have a DW_AT_name that is a filename, not
18478 a source language identifier. */
18479 case DW_TAG_enumeration_type
:
18480 case DW_TAG_enumerator
:
18481 /* These tags always have simple identifiers already; no need
18482 to canonicalize them. */
18483 name
= DW_STRING (&attr
);
18487 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18490 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
18491 &objfile
->per_bfd
->storage_obstack
);
18496 case DW_AT_linkage_name
:
18497 case DW_AT_MIPS_linkage_name
:
18498 /* Note that both forms of linkage name might appear. We
18499 assume they will be the same, and we only store the last
18501 if (cu
->language
== language_ada
)
18502 name
= DW_STRING (&attr
);
18503 linkage_name
= DW_STRING (&attr
);
18506 has_low_pc_attr
= 1;
18507 lowpc
= attr_value_as_address (&attr
);
18509 case DW_AT_high_pc
:
18510 has_high_pc_attr
= 1;
18511 highpc
= attr_value_as_address (&attr
);
18512 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
18513 high_pc_relative
= 1;
18515 case DW_AT_location
:
18516 /* Support the .debug_loc offsets. */
18517 if (attr_form_is_block (&attr
))
18519 d
.locdesc
= DW_BLOCK (&attr
);
18521 else if (attr_form_is_section_offset (&attr
))
18523 dwarf2_complex_location_expr_complaint ();
18527 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
18528 "partial symbol information");
18531 case DW_AT_external
:
18532 is_external
= DW_UNSND (&attr
);
18534 case DW_AT_declaration
:
18535 is_declaration
= DW_UNSND (&attr
);
18540 case DW_AT_abstract_origin
:
18541 case DW_AT_specification
:
18542 case DW_AT_extension
:
18543 has_specification
= 1;
18544 spec_offset
= dwarf2_get_ref_die_offset (&attr
);
18545 spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18546 || cu
->per_cu
->is_dwz
);
18548 case DW_AT_sibling
:
18549 /* Ignore absolute siblings, they might point outside of
18550 the current compile unit. */
18551 if (attr
.form
== DW_FORM_ref_addr
)
18552 complaint (&symfile_complaints
,
18553 _("ignoring absolute DW_AT_sibling"));
18556 const gdb_byte
*buffer
= reader
->buffer
;
18557 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
18558 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
18560 if (sibling_ptr
< info_ptr
)
18561 complaint (&symfile_complaints
,
18562 _("DW_AT_sibling points backwards"));
18563 else if (sibling_ptr
> reader
->buffer_end
)
18564 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
18566 sibling
= sibling_ptr
;
18569 case DW_AT_byte_size
:
18572 case DW_AT_const_value
:
18573 has_const_value
= 1;
18575 case DW_AT_calling_convention
:
18576 /* DWARF doesn't provide a way to identify a program's source-level
18577 entry point. DW_AT_calling_convention attributes are only meant
18578 to describe functions' calling conventions.
18580 However, because it's a necessary piece of information in
18581 Fortran, and before DWARF 4 DW_CC_program was the only
18582 piece of debugging information whose definition refers to
18583 a 'main program' at all, several compilers marked Fortran
18584 main programs with DW_CC_program --- even when those
18585 functions use the standard calling conventions.
18587 Although DWARF now specifies a way to provide this
18588 information, we support this practice for backward
18590 if (DW_UNSND (&attr
) == DW_CC_program
18591 && cu
->language
== language_fortran
)
18592 main_subprogram
= 1;
18595 if (DW_UNSND (&attr
) == DW_INL_inlined
18596 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
18597 may_be_inlined
= 1;
18601 if (tag
== DW_TAG_imported_unit
)
18603 d
.sect_off
= dwarf2_get_ref_die_offset (&attr
);
18604 is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18605 || cu
->per_cu
->is_dwz
);
18609 case DW_AT_main_subprogram
:
18610 main_subprogram
= DW_UNSND (&attr
);
18618 if (high_pc_relative
)
18621 if (has_low_pc_attr
&& has_high_pc_attr
)
18623 /* When using the GNU linker, .gnu.linkonce. sections are used to
18624 eliminate duplicate copies of functions and vtables and such.
18625 The linker will arbitrarily choose one and discard the others.
18626 The AT_*_pc values for such functions refer to local labels in
18627 these sections. If the section from that file was discarded, the
18628 labels are not in the output, so the relocs get a value of 0.
18629 If this is a discarded function, mark the pc bounds as invalid,
18630 so that GDB will ignore it. */
18631 if (lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
18633 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18634 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18636 complaint (&symfile_complaints
,
18637 _("DW_AT_low_pc %s is zero "
18638 "for DIE at %s [in module %s]"),
18639 paddress (gdbarch
, lowpc
),
18640 sect_offset_str (sect_off
),
18641 objfile_name (objfile
));
18643 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
18644 else if (lowpc
>= highpc
)
18646 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18647 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18649 complaint (&symfile_complaints
,
18650 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
18651 "for DIE at %s [in module %s]"),
18652 paddress (gdbarch
, lowpc
),
18653 paddress (gdbarch
, highpc
),
18654 sect_offset_str (sect_off
),
18655 objfile_name (objfile
));
18664 /* Find a cached partial DIE at OFFSET in CU. */
18666 struct partial_die_info
*
18667 dwarf2_cu::find_partial_die (sect_offset sect_off
)
18669 struct partial_die_info
*lookup_die
= NULL
;
18670 struct partial_die_info
part_die (sect_off
);
18672 lookup_die
= ((struct partial_die_info
*)
18673 htab_find_with_hash (partial_dies
, &part_die
,
18674 to_underlying (sect_off
)));
18679 /* Find a partial DIE at OFFSET, which may or may not be in CU,
18680 except in the case of .debug_types DIEs which do not reference
18681 outside their CU (they do however referencing other types via
18682 DW_FORM_ref_sig8). */
18684 static struct partial_die_info
*
18685 find_partial_die (sect_offset sect_off
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
18687 struct dwarf2_per_objfile
*dwarf2_per_objfile
18688 = cu
->per_cu
->dwarf2_per_objfile
;
18689 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18690 struct dwarf2_per_cu_data
*per_cu
= NULL
;
18691 struct partial_die_info
*pd
= NULL
;
18693 if (offset_in_dwz
== cu
->per_cu
->is_dwz
18694 && offset_in_cu_p (&cu
->header
, sect_off
))
18696 pd
= cu
->find_partial_die (sect_off
);
18699 /* We missed recording what we needed.
18700 Load all dies and try again. */
18701 per_cu
= cu
->per_cu
;
18705 /* TUs don't reference other CUs/TUs (except via type signatures). */
18706 if (cu
->per_cu
->is_debug_types
)
18708 error (_("Dwarf Error: Type Unit at offset %s contains"
18709 " external reference to offset %s [in module %s].\n"),
18710 sect_offset_str (cu
->header
.sect_off
), sect_offset_str (sect_off
),
18711 bfd_get_filename (objfile
->obfd
));
18713 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
18714 dwarf2_per_objfile
);
18716 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
18717 load_partial_comp_unit (per_cu
);
18719 per_cu
->cu
->last_used
= 0;
18720 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18723 /* If we didn't find it, and not all dies have been loaded,
18724 load them all and try again. */
18726 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
18728 per_cu
->load_all_dies
= 1;
18730 /* This is nasty. When we reread the DIEs, somewhere up the call chain
18731 THIS_CU->cu may already be in use. So we can't just free it and
18732 replace its DIEs with the ones we read in. Instead, we leave those
18733 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
18734 and clobber THIS_CU->cu->partial_dies with the hash table for the new
18736 load_partial_comp_unit (per_cu
);
18738 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18742 internal_error (__FILE__
, __LINE__
,
18743 _("could not find partial DIE %s "
18744 "in cache [from module %s]\n"),
18745 sect_offset_str (sect_off
), bfd_get_filename (objfile
->obfd
));
18749 /* See if we can figure out if the class lives in a namespace. We do
18750 this by looking for a member function; its demangled name will
18751 contain namespace info, if there is any. */
18754 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
18755 struct dwarf2_cu
*cu
)
18757 /* NOTE: carlton/2003-10-07: Getting the info this way changes
18758 what template types look like, because the demangler
18759 frequently doesn't give the same name as the debug info. We
18760 could fix this by only using the demangled name to get the
18761 prefix (but see comment in read_structure_type). */
18763 struct partial_die_info
*real_pdi
;
18764 struct partial_die_info
*child_pdi
;
18766 /* If this DIE (this DIE's specification, if any) has a parent, then
18767 we should not do this. We'll prepend the parent's fully qualified
18768 name when we create the partial symbol. */
18770 real_pdi
= struct_pdi
;
18771 while (real_pdi
->has_specification
)
18772 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
18773 real_pdi
->spec_is_dwz
, cu
);
18775 if (real_pdi
->die_parent
!= NULL
)
18778 for (child_pdi
= struct_pdi
->die_child
;
18780 child_pdi
= child_pdi
->die_sibling
)
18782 if (child_pdi
->tag
== DW_TAG_subprogram
18783 && child_pdi
->linkage_name
!= NULL
)
18785 char *actual_class_name
18786 = language_class_name_from_physname (cu
->language_defn
,
18787 child_pdi
->linkage_name
);
18788 if (actual_class_name
!= NULL
)
18790 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18793 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
18795 strlen (actual_class_name
)));
18796 xfree (actual_class_name
);
18804 partial_die_info::fixup (struct dwarf2_cu
*cu
)
18806 /* Once we've fixed up a die, there's no point in doing so again.
18807 This also avoids a memory leak if we were to call
18808 guess_partial_die_structure_name multiple times. */
18812 /* If we found a reference attribute and the DIE has no name, try
18813 to find a name in the referred to DIE. */
18815 if (name
== NULL
&& has_specification
)
18817 struct partial_die_info
*spec_die
;
18819 spec_die
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
18821 spec_die
->fixup (cu
);
18823 if (spec_die
->name
)
18825 name
= spec_die
->name
;
18827 /* Copy DW_AT_external attribute if it is set. */
18828 if (spec_die
->is_external
)
18829 is_external
= spec_die
->is_external
;
18833 /* Set default names for some unnamed DIEs. */
18835 if (name
== NULL
&& tag
== DW_TAG_namespace
)
18836 name
= CP_ANONYMOUS_NAMESPACE_STR
;
18838 /* If there is no parent die to provide a namespace, and there are
18839 children, see if we can determine the namespace from their linkage
18841 if (cu
->language
== language_cplus
18842 && !VEC_empty (dwarf2_section_info_def
,
18843 cu
->per_cu
->dwarf2_per_objfile
->types
)
18844 && die_parent
== NULL
18846 && (tag
== DW_TAG_class_type
18847 || tag
== DW_TAG_structure_type
18848 || tag
== DW_TAG_union_type
))
18849 guess_partial_die_structure_name (this, cu
);
18851 /* GCC might emit a nameless struct or union that has a linkage
18852 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
18854 && (tag
== DW_TAG_class_type
18855 || tag
== DW_TAG_interface_type
18856 || tag
== DW_TAG_structure_type
18857 || tag
== DW_TAG_union_type
)
18858 && linkage_name
!= NULL
)
18862 demangled
= gdb_demangle (linkage_name
, DMGL_TYPES
);
18867 /* Strip any leading namespaces/classes, keep only the base name.
18868 DW_AT_name for named DIEs does not contain the prefixes. */
18869 base
= strrchr (demangled
, ':');
18870 if (base
&& base
> demangled
&& base
[-1] == ':')
18875 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18878 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
18879 base
, strlen (base
)));
18887 /* Read an attribute value described by an attribute form. */
18889 static const gdb_byte
*
18890 read_attribute_value (const struct die_reader_specs
*reader
,
18891 struct attribute
*attr
, unsigned form
,
18892 LONGEST implicit_const
, const gdb_byte
*info_ptr
)
18894 struct dwarf2_cu
*cu
= reader
->cu
;
18895 struct dwarf2_per_objfile
*dwarf2_per_objfile
18896 = cu
->per_cu
->dwarf2_per_objfile
;
18897 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18898 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18899 bfd
*abfd
= reader
->abfd
;
18900 struct comp_unit_head
*cu_header
= &cu
->header
;
18901 unsigned int bytes_read
;
18902 struct dwarf_block
*blk
;
18904 attr
->form
= (enum dwarf_form
) form
;
18907 case DW_FORM_ref_addr
:
18908 if (cu
->header
.version
== 2)
18909 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
18911 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
18912 &cu
->header
, &bytes_read
);
18913 info_ptr
+= bytes_read
;
18915 case DW_FORM_GNU_ref_alt
:
18916 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
18917 info_ptr
+= bytes_read
;
18920 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
18921 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
18922 info_ptr
+= bytes_read
;
18924 case DW_FORM_block2
:
18925 blk
= dwarf_alloc_block (cu
);
18926 blk
->size
= read_2_bytes (abfd
, info_ptr
);
18928 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18929 info_ptr
+= blk
->size
;
18930 DW_BLOCK (attr
) = blk
;
18932 case DW_FORM_block4
:
18933 blk
= dwarf_alloc_block (cu
);
18934 blk
->size
= read_4_bytes (abfd
, info_ptr
);
18936 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18937 info_ptr
+= blk
->size
;
18938 DW_BLOCK (attr
) = blk
;
18940 case DW_FORM_data2
:
18941 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
18944 case DW_FORM_data4
:
18945 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
18948 case DW_FORM_data8
:
18949 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
18952 case DW_FORM_data16
:
18953 blk
= dwarf_alloc_block (cu
);
18955 blk
->data
= read_n_bytes (abfd
, info_ptr
, 16);
18957 DW_BLOCK (attr
) = blk
;
18959 case DW_FORM_sec_offset
:
18960 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
18961 info_ptr
+= bytes_read
;
18963 case DW_FORM_string
:
18964 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
18965 DW_STRING_IS_CANONICAL (attr
) = 0;
18966 info_ptr
+= bytes_read
;
18969 if (!cu
->per_cu
->is_dwz
)
18971 DW_STRING (attr
) = read_indirect_string (dwarf2_per_objfile
,
18972 abfd
, info_ptr
, cu_header
,
18974 DW_STRING_IS_CANONICAL (attr
) = 0;
18975 info_ptr
+= bytes_read
;
18979 case DW_FORM_line_strp
:
18980 if (!cu
->per_cu
->is_dwz
)
18982 DW_STRING (attr
) = read_indirect_line_string (dwarf2_per_objfile
,
18984 cu_header
, &bytes_read
);
18985 DW_STRING_IS_CANONICAL (attr
) = 0;
18986 info_ptr
+= bytes_read
;
18990 case DW_FORM_GNU_strp_alt
:
18992 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
18993 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
18996 DW_STRING (attr
) = read_indirect_string_from_dwz (objfile
,
18998 DW_STRING_IS_CANONICAL (attr
) = 0;
18999 info_ptr
+= bytes_read
;
19002 case DW_FORM_exprloc
:
19003 case DW_FORM_block
:
19004 blk
= dwarf_alloc_block (cu
);
19005 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19006 info_ptr
+= bytes_read
;
19007 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19008 info_ptr
+= blk
->size
;
19009 DW_BLOCK (attr
) = blk
;
19011 case DW_FORM_block1
:
19012 blk
= dwarf_alloc_block (cu
);
19013 blk
->size
= read_1_byte (abfd
, info_ptr
);
19015 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19016 info_ptr
+= blk
->size
;
19017 DW_BLOCK (attr
) = blk
;
19019 case DW_FORM_data1
:
19020 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19024 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19027 case DW_FORM_flag_present
:
19028 DW_UNSND (attr
) = 1;
19030 case DW_FORM_sdata
:
19031 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19032 info_ptr
+= bytes_read
;
19034 case DW_FORM_udata
:
19035 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19036 info_ptr
+= bytes_read
;
19039 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19040 + read_1_byte (abfd
, info_ptr
));
19044 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19045 + read_2_bytes (abfd
, info_ptr
));
19049 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19050 + read_4_bytes (abfd
, info_ptr
));
19054 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19055 + read_8_bytes (abfd
, info_ptr
));
19058 case DW_FORM_ref_sig8
:
19059 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
19062 case DW_FORM_ref_udata
:
19063 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19064 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
19065 info_ptr
+= bytes_read
;
19067 case DW_FORM_indirect
:
19068 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19069 info_ptr
+= bytes_read
;
19070 if (form
== DW_FORM_implicit_const
)
19072 implicit_const
= read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19073 info_ptr
+= bytes_read
;
19075 info_ptr
= read_attribute_value (reader
, attr
, form
, implicit_const
,
19078 case DW_FORM_implicit_const
:
19079 DW_SND (attr
) = implicit_const
;
19081 case DW_FORM_GNU_addr_index
:
19082 if (reader
->dwo_file
== NULL
)
19084 /* For now flag a hard error.
19085 Later we can turn this into a complaint. */
19086 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
19087 dwarf_form_name (form
),
19088 bfd_get_filename (abfd
));
19090 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
19091 info_ptr
+= bytes_read
;
19093 case DW_FORM_GNU_str_index
:
19094 if (reader
->dwo_file
== NULL
)
19096 /* For now flag a hard error.
19097 Later we can turn this into a complaint if warranted. */
19098 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
19099 dwarf_form_name (form
),
19100 bfd_get_filename (abfd
));
19103 ULONGEST str_index
=
19104 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19106 DW_STRING (attr
) = read_str_index (reader
, str_index
);
19107 DW_STRING_IS_CANONICAL (attr
) = 0;
19108 info_ptr
+= bytes_read
;
19112 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
19113 dwarf_form_name (form
),
19114 bfd_get_filename (abfd
));
19118 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
19119 attr
->form
= DW_FORM_GNU_ref_alt
;
19121 /* We have seen instances where the compiler tried to emit a byte
19122 size attribute of -1 which ended up being encoded as an unsigned
19123 0xffffffff. Although 0xffffffff is technically a valid size value,
19124 an object of this size seems pretty unlikely so we can relatively
19125 safely treat these cases as if the size attribute was invalid and
19126 treat them as zero by default. */
19127 if (attr
->name
== DW_AT_byte_size
19128 && form
== DW_FORM_data4
19129 && DW_UNSND (attr
) >= 0xffffffff)
19132 (&symfile_complaints
,
19133 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
19134 hex_string (DW_UNSND (attr
)));
19135 DW_UNSND (attr
) = 0;
19141 /* Read an attribute described by an abbreviated attribute. */
19143 static const gdb_byte
*
19144 read_attribute (const struct die_reader_specs
*reader
,
19145 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
19146 const gdb_byte
*info_ptr
)
19148 attr
->name
= abbrev
->name
;
19149 return read_attribute_value (reader
, attr
, abbrev
->form
,
19150 abbrev
->implicit_const
, info_ptr
);
19153 /* Read dwarf information from a buffer. */
19155 static unsigned int
19156 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
19158 return bfd_get_8 (abfd
, buf
);
19162 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
19164 return bfd_get_signed_8 (abfd
, buf
);
19167 static unsigned int
19168 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19170 return bfd_get_16 (abfd
, buf
);
19174 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19176 return bfd_get_signed_16 (abfd
, buf
);
19179 static unsigned int
19180 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19182 return bfd_get_32 (abfd
, buf
);
19186 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19188 return bfd_get_signed_32 (abfd
, buf
);
19192 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19194 return bfd_get_64 (abfd
, buf
);
19198 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
19199 unsigned int *bytes_read
)
19201 struct comp_unit_head
*cu_header
= &cu
->header
;
19202 CORE_ADDR retval
= 0;
19204 if (cu_header
->signed_addr_p
)
19206 switch (cu_header
->addr_size
)
19209 retval
= bfd_get_signed_16 (abfd
, buf
);
19212 retval
= bfd_get_signed_32 (abfd
, buf
);
19215 retval
= bfd_get_signed_64 (abfd
, buf
);
19218 internal_error (__FILE__
, __LINE__
,
19219 _("read_address: bad switch, signed [in module %s]"),
19220 bfd_get_filename (abfd
));
19225 switch (cu_header
->addr_size
)
19228 retval
= bfd_get_16 (abfd
, buf
);
19231 retval
= bfd_get_32 (abfd
, buf
);
19234 retval
= bfd_get_64 (abfd
, buf
);
19237 internal_error (__FILE__
, __LINE__
,
19238 _("read_address: bad switch, "
19239 "unsigned [in module %s]"),
19240 bfd_get_filename (abfd
));
19244 *bytes_read
= cu_header
->addr_size
;
19248 /* Read the initial length from a section. The (draft) DWARF 3
19249 specification allows the initial length to take up either 4 bytes
19250 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
19251 bytes describe the length and all offsets will be 8 bytes in length
19254 An older, non-standard 64-bit format is also handled by this
19255 function. The older format in question stores the initial length
19256 as an 8-byte quantity without an escape value. Lengths greater
19257 than 2^32 aren't very common which means that the initial 4 bytes
19258 is almost always zero. Since a length value of zero doesn't make
19259 sense for the 32-bit format, this initial zero can be considered to
19260 be an escape value which indicates the presence of the older 64-bit
19261 format. As written, the code can't detect (old format) lengths
19262 greater than 4GB. If it becomes necessary to handle lengths
19263 somewhat larger than 4GB, we could allow other small values (such
19264 as the non-sensical values of 1, 2, and 3) to also be used as
19265 escape values indicating the presence of the old format.
19267 The value returned via bytes_read should be used to increment the
19268 relevant pointer after calling read_initial_length().
19270 [ Note: read_initial_length() and read_offset() are based on the
19271 document entitled "DWARF Debugging Information Format", revision
19272 3, draft 8, dated November 19, 2001. This document was obtained
19275 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
19277 This document is only a draft and is subject to change. (So beware.)
19279 Details regarding the older, non-standard 64-bit format were
19280 determined empirically by examining 64-bit ELF files produced by
19281 the SGI toolchain on an IRIX 6.5 machine.
19283 - Kevin, July 16, 2002
19287 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
19289 LONGEST length
= bfd_get_32 (abfd
, buf
);
19291 if (length
== 0xffffffff)
19293 length
= bfd_get_64 (abfd
, buf
+ 4);
19296 else if (length
== 0)
19298 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
19299 length
= bfd_get_64 (abfd
, buf
);
19310 /* Cover function for read_initial_length.
19311 Returns the length of the object at BUF, and stores the size of the
19312 initial length in *BYTES_READ and stores the size that offsets will be in
19314 If the initial length size is not equivalent to that specified in
19315 CU_HEADER then issue a complaint.
19316 This is useful when reading non-comp-unit headers. */
19319 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
19320 const struct comp_unit_head
*cu_header
,
19321 unsigned int *bytes_read
,
19322 unsigned int *offset_size
)
19324 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
19326 gdb_assert (cu_header
->initial_length_size
== 4
19327 || cu_header
->initial_length_size
== 8
19328 || cu_header
->initial_length_size
== 12);
19330 if (cu_header
->initial_length_size
!= *bytes_read
)
19331 complaint (&symfile_complaints
,
19332 _("intermixed 32-bit and 64-bit DWARF sections"));
19334 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
19338 /* Read an offset from the data stream. The size of the offset is
19339 given by cu_header->offset_size. */
19342 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
19343 const struct comp_unit_head
*cu_header
,
19344 unsigned int *bytes_read
)
19346 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
19348 *bytes_read
= cu_header
->offset_size
;
19352 /* Read an offset from the data stream. */
19355 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
19357 LONGEST retval
= 0;
19359 switch (offset_size
)
19362 retval
= bfd_get_32 (abfd
, buf
);
19365 retval
= bfd_get_64 (abfd
, buf
);
19368 internal_error (__FILE__
, __LINE__
,
19369 _("read_offset_1: bad switch [in module %s]"),
19370 bfd_get_filename (abfd
));
19376 static const gdb_byte
*
19377 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
19379 /* If the size of a host char is 8 bits, we can return a pointer
19380 to the buffer, otherwise we have to copy the data to a buffer
19381 allocated on the temporary obstack. */
19382 gdb_assert (HOST_CHAR_BIT
== 8);
19386 static const char *
19387 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
19388 unsigned int *bytes_read_ptr
)
19390 /* If the size of a host char is 8 bits, we can return a pointer
19391 to the string, otherwise we have to copy the string to a buffer
19392 allocated on the temporary obstack. */
19393 gdb_assert (HOST_CHAR_BIT
== 8);
19396 *bytes_read_ptr
= 1;
19399 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
19400 return (const char *) buf
;
19403 /* Return pointer to string at section SECT offset STR_OFFSET with error
19404 reporting strings FORM_NAME and SECT_NAME. */
19406 static const char *
19407 read_indirect_string_at_offset_from (struct objfile
*objfile
,
19408 bfd
*abfd
, LONGEST str_offset
,
19409 struct dwarf2_section_info
*sect
,
19410 const char *form_name
,
19411 const char *sect_name
)
19413 dwarf2_read_section (objfile
, sect
);
19414 if (sect
->buffer
== NULL
)
19415 error (_("%s used without %s section [in module %s]"),
19416 form_name
, sect_name
, bfd_get_filename (abfd
));
19417 if (str_offset
>= sect
->size
)
19418 error (_("%s pointing outside of %s section [in module %s]"),
19419 form_name
, sect_name
, bfd_get_filename (abfd
));
19420 gdb_assert (HOST_CHAR_BIT
== 8);
19421 if (sect
->buffer
[str_offset
] == '\0')
19423 return (const char *) (sect
->buffer
+ str_offset
);
19426 /* Return pointer to string at .debug_str offset STR_OFFSET. */
19428 static const char *
19429 read_indirect_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19430 bfd
*abfd
, LONGEST str_offset
)
19432 return read_indirect_string_at_offset_from (dwarf2_per_objfile
->objfile
,
19434 &dwarf2_per_objfile
->str
,
19435 "DW_FORM_strp", ".debug_str");
19438 /* Return pointer to string at .debug_line_str offset STR_OFFSET. */
19440 static const char *
19441 read_indirect_line_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19442 bfd
*abfd
, LONGEST str_offset
)
19444 return read_indirect_string_at_offset_from (dwarf2_per_objfile
->objfile
,
19446 &dwarf2_per_objfile
->line_str
,
19447 "DW_FORM_line_strp",
19448 ".debug_line_str");
19451 /* Read a string at offset STR_OFFSET in the .debug_str section from
19452 the .dwz file DWZ. Throw an error if the offset is too large. If
19453 the string consists of a single NUL byte, return NULL; otherwise
19454 return a pointer to the string. */
19456 static const char *
19457 read_indirect_string_from_dwz (struct objfile
*objfile
, struct dwz_file
*dwz
,
19458 LONGEST str_offset
)
19460 dwarf2_read_section (objfile
, &dwz
->str
);
19462 if (dwz
->str
.buffer
== NULL
)
19463 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
19464 "section [in module %s]"),
19465 bfd_get_filename (dwz
->dwz_bfd
));
19466 if (str_offset
>= dwz
->str
.size
)
19467 error (_("DW_FORM_GNU_strp_alt pointing outside of "
19468 ".debug_str section [in module %s]"),
19469 bfd_get_filename (dwz
->dwz_bfd
));
19470 gdb_assert (HOST_CHAR_BIT
== 8);
19471 if (dwz
->str
.buffer
[str_offset
] == '\0')
19473 return (const char *) (dwz
->str
.buffer
+ str_offset
);
19476 /* Return pointer to string at .debug_str offset as read from BUF.
19477 BUF is assumed to be in a compilation unit described by CU_HEADER.
19478 Return *BYTES_READ_PTR count of bytes read from BUF. */
19480 static const char *
19481 read_indirect_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
19482 const gdb_byte
*buf
,
19483 const struct comp_unit_head
*cu_header
,
19484 unsigned int *bytes_read_ptr
)
19486 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
19488 return read_indirect_string_at_offset (dwarf2_per_objfile
, abfd
, str_offset
);
19491 /* Return pointer to string at .debug_line_str offset as read from BUF.
19492 BUF is assumed to be in a compilation unit described by CU_HEADER.
19493 Return *BYTES_READ_PTR count of bytes read from BUF. */
19495 static const char *
19496 read_indirect_line_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19497 bfd
*abfd
, const gdb_byte
*buf
,
19498 const struct comp_unit_head
*cu_header
,
19499 unsigned int *bytes_read_ptr
)
19501 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
19503 return read_indirect_line_string_at_offset (dwarf2_per_objfile
, abfd
,
19508 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
19509 unsigned int *bytes_read_ptr
)
19512 unsigned int num_read
;
19514 unsigned char byte
;
19521 byte
= bfd_get_8 (abfd
, buf
);
19524 result
|= ((ULONGEST
) (byte
& 127) << shift
);
19525 if ((byte
& 128) == 0)
19531 *bytes_read_ptr
= num_read
;
19536 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
19537 unsigned int *bytes_read_ptr
)
19540 int shift
, num_read
;
19541 unsigned char byte
;
19548 byte
= bfd_get_8 (abfd
, buf
);
19551 result
|= ((LONGEST
) (byte
& 127) << shift
);
19553 if ((byte
& 128) == 0)
19558 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
19559 result
|= -(((LONGEST
) 1) << shift
);
19560 *bytes_read_ptr
= num_read
;
19564 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
19565 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
19566 ADDR_SIZE is the size of addresses from the CU header. */
19569 read_addr_index_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19570 unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
19572 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19573 bfd
*abfd
= objfile
->obfd
;
19574 const gdb_byte
*info_ptr
;
19576 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
19577 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
19578 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
19579 objfile_name (objfile
));
19580 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
19581 error (_("DW_FORM_addr_index pointing outside of "
19582 ".debug_addr section [in module %s]"),
19583 objfile_name (objfile
));
19584 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
19585 + addr_base
+ addr_index
* addr_size
);
19586 if (addr_size
== 4)
19587 return bfd_get_32 (abfd
, info_ptr
);
19589 return bfd_get_64 (abfd
, info_ptr
);
19592 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
19595 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
19597 return read_addr_index_1 (cu
->per_cu
->dwarf2_per_objfile
, addr_index
,
19598 cu
->addr_base
, cu
->header
.addr_size
);
19601 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
19604 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
19605 unsigned int *bytes_read
)
19607 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
19608 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
19610 return read_addr_index (cu
, addr_index
);
19613 /* Data structure to pass results from dwarf2_read_addr_index_reader
19614 back to dwarf2_read_addr_index. */
19616 struct dwarf2_read_addr_index_data
19618 ULONGEST addr_base
;
19622 /* die_reader_func for dwarf2_read_addr_index. */
19625 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
19626 const gdb_byte
*info_ptr
,
19627 struct die_info
*comp_unit_die
,
19631 struct dwarf2_cu
*cu
= reader
->cu
;
19632 struct dwarf2_read_addr_index_data
*aidata
=
19633 (struct dwarf2_read_addr_index_data
*) data
;
19635 aidata
->addr_base
= cu
->addr_base
;
19636 aidata
->addr_size
= cu
->header
.addr_size
;
19639 /* Given an index in .debug_addr, fetch the value.
19640 NOTE: This can be called during dwarf expression evaluation,
19641 long after the debug information has been read, and thus per_cu->cu
19642 may no longer exist. */
19645 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
19646 unsigned int addr_index
)
19648 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
19649 struct dwarf2_cu
*cu
= per_cu
->cu
;
19650 ULONGEST addr_base
;
19653 /* We need addr_base and addr_size.
19654 If we don't have PER_CU->cu, we have to get it.
19655 Nasty, but the alternative is storing the needed info in PER_CU,
19656 which at this point doesn't seem justified: it's not clear how frequently
19657 it would get used and it would increase the size of every PER_CU.
19658 Entry points like dwarf2_per_cu_addr_size do a similar thing
19659 so we're not in uncharted territory here.
19660 Alas we need to be a bit more complicated as addr_base is contained
19663 We don't need to read the entire CU(/TU).
19664 We just need the header and top level die.
19666 IWBN to use the aging mechanism to let us lazily later discard the CU.
19667 For now we skip this optimization. */
19671 addr_base
= cu
->addr_base
;
19672 addr_size
= cu
->header
.addr_size
;
19676 struct dwarf2_read_addr_index_data aidata
;
19678 /* Note: We can't use init_cutu_and_read_dies_simple here,
19679 we need addr_base. */
19680 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
19681 dwarf2_read_addr_index_reader
, &aidata
);
19682 addr_base
= aidata
.addr_base
;
19683 addr_size
= aidata
.addr_size
;
19686 return read_addr_index_1 (dwarf2_per_objfile
, addr_index
, addr_base
,
19690 /* Given a DW_FORM_GNU_str_index, fetch the string.
19691 This is only used by the Fission support. */
19693 static const char *
19694 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
19696 struct dwarf2_cu
*cu
= reader
->cu
;
19697 struct dwarf2_per_objfile
*dwarf2_per_objfile
19698 = cu
->per_cu
->dwarf2_per_objfile
;
19699 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19700 const char *objf_name
= objfile_name (objfile
);
19701 bfd
*abfd
= objfile
->obfd
;
19702 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
19703 struct dwarf2_section_info
*str_offsets_section
=
19704 &reader
->dwo_file
->sections
.str_offsets
;
19705 const gdb_byte
*info_ptr
;
19706 ULONGEST str_offset
;
19707 static const char form_name
[] = "DW_FORM_GNU_str_index";
19709 dwarf2_read_section (objfile
, str_section
);
19710 dwarf2_read_section (objfile
, str_offsets_section
);
19711 if (str_section
->buffer
== NULL
)
19712 error (_("%s used without .debug_str.dwo section"
19713 " in CU at offset %s [in module %s]"),
19714 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19715 if (str_offsets_section
->buffer
== NULL
)
19716 error (_("%s used without .debug_str_offsets.dwo section"
19717 " in CU at offset %s [in module %s]"),
19718 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19719 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
19720 error (_("%s pointing outside of .debug_str_offsets.dwo"
19721 " section in CU at offset %s [in module %s]"),
19722 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19723 info_ptr
= (str_offsets_section
->buffer
19724 + str_index
* cu
->header
.offset_size
);
19725 if (cu
->header
.offset_size
== 4)
19726 str_offset
= bfd_get_32 (abfd
, info_ptr
);
19728 str_offset
= bfd_get_64 (abfd
, info_ptr
);
19729 if (str_offset
>= str_section
->size
)
19730 error (_("Offset from %s pointing outside of"
19731 " .debug_str.dwo section in CU at offset %s [in module %s]"),
19732 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19733 return (const char *) (str_section
->buffer
+ str_offset
);
19736 /* Return the length of an LEB128 number in BUF. */
19739 leb128_size (const gdb_byte
*buf
)
19741 const gdb_byte
*begin
= buf
;
19747 if ((byte
& 128) == 0)
19748 return buf
- begin
;
19753 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
19762 cu
->language
= language_c
;
19765 case DW_LANG_C_plus_plus
:
19766 case DW_LANG_C_plus_plus_11
:
19767 case DW_LANG_C_plus_plus_14
:
19768 cu
->language
= language_cplus
;
19771 cu
->language
= language_d
;
19773 case DW_LANG_Fortran77
:
19774 case DW_LANG_Fortran90
:
19775 case DW_LANG_Fortran95
:
19776 case DW_LANG_Fortran03
:
19777 case DW_LANG_Fortran08
:
19778 cu
->language
= language_fortran
;
19781 cu
->language
= language_go
;
19783 case DW_LANG_Mips_Assembler
:
19784 cu
->language
= language_asm
;
19786 case DW_LANG_Ada83
:
19787 case DW_LANG_Ada95
:
19788 cu
->language
= language_ada
;
19790 case DW_LANG_Modula2
:
19791 cu
->language
= language_m2
;
19793 case DW_LANG_Pascal83
:
19794 cu
->language
= language_pascal
;
19797 cu
->language
= language_objc
;
19800 case DW_LANG_Rust_old
:
19801 cu
->language
= language_rust
;
19803 case DW_LANG_Cobol74
:
19804 case DW_LANG_Cobol85
:
19806 cu
->language
= language_minimal
;
19809 cu
->language_defn
= language_def (cu
->language
);
19812 /* Return the named attribute or NULL if not there. */
19814 static struct attribute
*
19815 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19820 struct attribute
*spec
= NULL
;
19822 for (i
= 0; i
< die
->num_attrs
; ++i
)
19824 if (die
->attrs
[i
].name
== name
)
19825 return &die
->attrs
[i
];
19826 if (die
->attrs
[i
].name
== DW_AT_specification
19827 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
19828 spec
= &die
->attrs
[i
];
19834 die
= follow_die_ref (die
, spec
, &cu
);
19840 /* Return the named attribute or NULL if not there,
19841 but do not follow DW_AT_specification, etc.
19842 This is for use in contexts where we're reading .debug_types dies.
19843 Following DW_AT_specification, DW_AT_abstract_origin will take us
19844 back up the chain, and we want to go down. */
19846 static struct attribute
*
19847 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
19851 for (i
= 0; i
< die
->num_attrs
; ++i
)
19852 if (die
->attrs
[i
].name
== name
)
19853 return &die
->attrs
[i
];
19858 /* Return the string associated with a string-typed attribute, or NULL if it
19859 is either not found or is of an incorrect type. */
19861 static const char *
19862 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19864 struct attribute
*attr
;
19865 const char *str
= NULL
;
19867 attr
= dwarf2_attr (die
, name
, cu
);
19871 if (attr
->form
== DW_FORM_strp
|| attr
->form
== DW_FORM_line_strp
19872 || attr
->form
== DW_FORM_string
19873 || attr
->form
== DW_FORM_GNU_str_index
19874 || attr
->form
== DW_FORM_GNU_strp_alt
)
19875 str
= DW_STRING (attr
);
19877 complaint (&symfile_complaints
,
19878 _("string type expected for attribute %s for "
19879 "DIE at %s in module %s"),
19880 dwarf_attr_name (name
), sect_offset_str (die
->sect_off
),
19881 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
19887 /* Return non-zero iff the attribute NAME is defined for the given DIE,
19888 and holds a non-zero value. This function should only be used for
19889 DW_FORM_flag or DW_FORM_flag_present attributes. */
19892 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
19894 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
19896 return (attr
&& DW_UNSND (attr
));
19900 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
19902 /* A DIE is a declaration if it has a DW_AT_declaration attribute
19903 which value is non-zero. However, we have to be careful with
19904 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
19905 (via dwarf2_flag_true_p) follows this attribute. So we may
19906 end up accidently finding a declaration attribute that belongs
19907 to a different DIE referenced by the specification attribute,
19908 even though the given DIE does not have a declaration attribute. */
19909 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
19910 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
19913 /* Return the die giving the specification for DIE, if there is
19914 one. *SPEC_CU is the CU containing DIE on input, and the CU
19915 containing the return value on output. If there is no
19916 specification, but there is an abstract origin, that is
19919 static struct die_info
*
19920 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
19922 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
19925 if (spec_attr
== NULL
)
19926 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
19928 if (spec_attr
== NULL
)
19931 return follow_die_ref (die
, spec_attr
, spec_cu
);
19934 /* Stub for free_line_header to match void * callback types. */
19937 free_line_header_voidp (void *arg
)
19939 struct line_header
*lh
= (struct line_header
*) arg
;
19945 line_header::add_include_dir (const char *include_dir
)
19947 if (dwarf_line_debug
>= 2)
19948 fprintf_unfiltered (gdb_stdlog
, "Adding dir %zu: %s\n",
19949 include_dirs
.size () + 1, include_dir
);
19951 include_dirs
.push_back (include_dir
);
19955 line_header::add_file_name (const char *name
,
19957 unsigned int mod_time
,
19958 unsigned int length
)
19960 if (dwarf_line_debug
>= 2)
19961 fprintf_unfiltered (gdb_stdlog
, "Adding file %u: %s\n",
19962 (unsigned) file_names
.size () + 1, name
);
19964 file_names
.emplace_back (name
, d_index
, mod_time
, length
);
19967 /* A convenience function to find the proper .debug_line section for a CU. */
19969 static struct dwarf2_section_info
*
19970 get_debug_line_section (struct dwarf2_cu
*cu
)
19972 struct dwarf2_section_info
*section
;
19973 struct dwarf2_per_objfile
*dwarf2_per_objfile
19974 = cu
->per_cu
->dwarf2_per_objfile
;
19976 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
19978 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
19979 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
19980 else if (cu
->per_cu
->is_dwz
)
19982 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
19984 section
= &dwz
->line
;
19987 section
= &dwarf2_per_objfile
->line
;
19992 /* Read directory or file name entry format, starting with byte of
19993 format count entries, ULEB128 pairs of entry formats, ULEB128 of
19994 entries count and the entries themselves in the described entry
19998 read_formatted_entries (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19999 bfd
*abfd
, const gdb_byte
**bufp
,
20000 struct line_header
*lh
,
20001 const struct comp_unit_head
*cu_header
,
20002 void (*callback
) (struct line_header
*lh
,
20005 unsigned int mod_time
,
20006 unsigned int length
))
20008 gdb_byte format_count
, formati
;
20009 ULONGEST data_count
, datai
;
20010 const gdb_byte
*buf
= *bufp
;
20011 const gdb_byte
*format_header_data
;
20012 unsigned int bytes_read
;
20014 format_count
= read_1_byte (abfd
, buf
);
20016 format_header_data
= buf
;
20017 for (formati
= 0; formati
< format_count
; formati
++)
20019 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
20021 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
20025 data_count
= read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
20027 for (datai
= 0; datai
< data_count
; datai
++)
20029 const gdb_byte
*format
= format_header_data
;
20030 struct file_entry fe
;
20032 for (formati
= 0; formati
< format_count
; formati
++)
20034 ULONGEST content_type
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
20035 format
+= bytes_read
;
20037 ULONGEST form
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
20038 format
+= bytes_read
;
20040 gdb::optional
<const char *> string
;
20041 gdb::optional
<unsigned int> uint
;
20045 case DW_FORM_string
:
20046 string
.emplace (read_direct_string (abfd
, buf
, &bytes_read
));
20050 case DW_FORM_line_strp
:
20051 string
.emplace (read_indirect_line_string (dwarf2_per_objfile
,
20058 case DW_FORM_data1
:
20059 uint
.emplace (read_1_byte (abfd
, buf
));
20063 case DW_FORM_data2
:
20064 uint
.emplace (read_2_bytes (abfd
, buf
));
20068 case DW_FORM_data4
:
20069 uint
.emplace (read_4_bytes (abfd
, buf
));
20073 case DW_FORM_data8
:
20074 uint
.emplace (read_8_bytes (abfd
, buf
));
20078 case DW_FORM_udata
:
20079 uint
.emplace (read_unsigned_leb128 (abfd
, buf
, &bytes_read
));
20083 case DW_FORM_block
:
20084 /* It is valid only for DW_LNCT_timestamp which is ignored by
20089 switch (content_type
)
20092 if (string
.has_value ())
20095 case DW_LNCT_directory_index
:
20096 if (uint
.has_value ())
20097 fe
.d_index
= (dir_index
) *uint
;
20099 case DW_LNCT_timestamp
:
20100 if (uint
.has_value ())
20101 fe
.mod_time
= *uint
;
20104 if (uint
.has_value ())
20110 complaint (&symfile_complaints
,
20111 _("Unknown format content type %s"),
20112 pulongest (content_type
));
20116 callback (lh
, fe
.name
, fe
.d_index
, fe
.mod_time
, fe
.length
);
20122 /* Read the statement program header starting at OFFSET in
20123 .debug_line, or .debug_line.dwo. Return a pointer
20124 to a struct line_header, allocated using xmalloc.
20125 Returns NULL if there is a problem reading the header, e.g., if it
20126 has a version we don't understand.
20128 NOTE: the strings in the include directory and file name tables of
20129 the returned object point into the dwarf line section buffer,
20130 and must not be freed. */
20132 static line_header_up
20133 dwarf_decode_line_header (sect_offset sect_off
, struct dwarf2_cu
*cu
)
20135 const gdb_byte
*line_ptr
;
20136 unsigned int bytes_read
, offset_size
;
20138 const char *cur_dir
, *cur_file
;
20139 struct dwarf2_section_info
*section
;
20141 struct dwarf2_per_objfile
*dwarf2_per_objfile
20142 = cu
->per_cu
->dwarf2_per_objfile
;
20144 section
= get_debug_line_section (cu
);
20145 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
20146 if (section
->buffer
== NULL
)
20148 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
20149 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
20151 complaint (&symfile_complaints
, _("missing .debug_line section"));
20155 /* We can't do this until we know the section is non-empty.
20156 Only then do we know we have such a section. */
20157 abfd
= get_section_bfd_owner (section
);
20159 /* Make sure that at least there's room for the total_length field.
20160 That could be 12 bytes long, but we're just going to fudge that. */
20161 if (to_underlying (sect_off
) + 4 >= section
->size
)
20163 dwarf2_statement_list_fits_in_line_number_section_complaint ();
20167 line_header_up
lh (new line_header ());
20169 lh
->sect_off
= sect_off
;
20170 lh
->offset_in_dwz
= cu
->per_cu
->is_dwz
;
20172 line_ptr
= section
->buffer
+ to_underlying (sect_off
);
20174 /* Read in the header. */
20176 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
20177 &bytes_read
, &offset_size
);
20178 line_ptr
+= bytes_read
;
20179 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
20181 dwarf2_statement_list_fits_in_line_number_section_complaint ();
20184 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
20185 lh
->version
= read_2_bytes (abfd
, line_ptr
);
20187 if (lh
->version
> 5)
20189 /* This is a version we don't understand. The format could have
20190 changed in ways we don't handle properly so just punt. */
20191 complaint (&symfile_complaints
,
20192 _("unsupported version in .debug_line section"));
20195 if (lh
->version
>= 5)
20197 gdb_byte segment_selector_size
;
20199 /* Skip address size. */
20200 read_1_byte (abfd
, line_ptr
);
20203 segment_selector_size
= read_1_byte (abfd
, line_ptr
);
20205 if (segment_selector_size
!= 0)
20207 complaint (&symfile_complaints
,
20208 _("unsupported segment selector size %u "
20209 "in .debug_line section"),
20210 segment_selector_size
);
20214 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
20215 line_ptr
+= offset_size
;
20216 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
20218 if (lh
->version
>= 4)
20220 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
20224 lh
->maximum_ops_per_instruction
= 1;
20226 if (lh
->maximum_ops_per_instruction
== 0)
20228 lh
->maximum_ops_per_instruction
= 1;
20229 complaint (&symfile_complaints
,
20230 _("invalid maximum_ops_per_instruction "
20231 "in `.debug_line' section"));
20234 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
20236 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
20238 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
20240 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
20242 lh
->standard_opcode_lengths
.reset (new unsigned char[lh
->opcode_base
]);
20244 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
20245 for (i
= 1; i
< lh
->opcode_base
; ++i
)
20247 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
20251 if (lh
->version
>= 5)
20253 /* Read directory table. */
20254 read_formatted_entries (dwarf2_per_objfile
, abfd
, &line_ptr
, lh
.get (),
20256 [] (struct line_header
*lh
, const char *name
,
20257 dir_index d_index
, unsigned int mod_time
,
20258 unsigned int length
)
20260 lh
->add_include_dir (name
);
20263 /* Read file name table. */
20264 read_formatted_entries (dwarf2_per_objfile
, abfd
, &line_ptr
, lh
.get (),
20266 [] (struct line_header
*lh
, const char *name
,
20267 dir_index d_index
, unsigned int mod_time
,
20268 unsigned int length
)
20270 lh
->add_file_name (name
, d_index
, mod_time
, length
);
20275 /* Read directory table. */
20276 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
20278 line_ptr
+= bytes_read
;
20279 lh
->add_include_dir (cur_dir
);
20281 line_ptr
+= bytes_read
;
20283 /* Read file name table. */
20284 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
20286 unsigned int mod_time
, length
;
20289 line_ptr
+= bytes_read
;
20290 d_index
= (dir_index
) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20291 line_ptr
+= bytes_read
;
20292 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20293 line_ptr
+= bytes_read
;
20294 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20295 line_ptr
+= bytes_read
;
20297 lh
->add_file_name (cur_file
, d_index
, mod_time
, length
);
20299 line_ptr
+= bytes_read
;
20301 lh
->statement_program_start
= line_ptr
;
20303 if (line_ptr
> (section
->buffer
+ section
->size
))
20304 complaint (&symfile_complaints
,
20305 _("line number info header doesn't "
20306 "fit in `.debug_line' section"));
20311 /* Subroutine of dwarf_decode_lines to simplify it.
20312 Return the file name of the psymtab for included file FILE_INDEX
20313 in line header LH of PST.
20314 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
20315 If space for the result is malloc'd, *NAME_HOLDER will be set.
20316 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
20318 static const char *
20319 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
20320 const struct partial_symtab
*pst
,
20321 const char *comp_dir
,
20322 gdb::unique_xmalloc_ptr
<char> *name_holder
)
20324 const file_entry
&fe
= lh
->file_names
[file_index
];
20325 const char *include_name
= fe
.name
;
20326 const char *include_name_to_compare
= include_name
;
20327 const char *pst_filename
;
20330 const char *dir_name
= fe
.include_dir (lh
);
20332 gdb::unique_xmalloc_ptr
<char> hold_compare
;
20333 if (!IS_ABSOLUTE_PATH (include_name
)
20334 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
20336 /* Avoid creating a duplicate psymtab for PST.
20337 We do this by comparing INCLUDE_NAME and PST_FILENAME.
20338 Before we do the comparison, however, we need to account
20339 for DIR_NAME and COMP_DIR.
20340 First prepend dir_name (if non-NULL). If we still don't
20341 have an absolute path prepend comp_dir (if non-NULL).
20342 However, the directory we record in the include-file's
20343 psymtab does not contain COMP_DIR (to match the
20344 corresponding symtab(s)).
20349 bash$ gcc -g ./hello.c
20350 include_name = "hello.c"
20352 DW_AT_comp_dir = comp_dir = "/tmp"
20353 DW_AT_name = "./hello.c"
20357 if (dir_name
!= NULL
)
20359 name_holder
->reset (concat (dir_name
, SLASH_STRING
,
20360 include_name
, (char *) NULL
));
20361 include_name
= name_holder
->get ();
20362 include_name_to_compare
= include_name
;
20364 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
20366 hold_compare
.reset (concat (comp_dir
, SLASH_STRING
,
20367 include_name
, (char *) NULL
));
20368 include_name_to_compare
= hold_compare
.get ();
20372 pst_filename
= pst
->filename
;
20373 gdb::unique_xmalloc_ptr
<char> copied_name
;
20374 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
20376 copied_name
.reset (concat (pst
->dirname
, SLASH_STRING
,
20377 pst_filename
, (char *) NULL
));
20378 pst_filename
= copied_name
.get ();
20381 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
20385 return include_name
;
20388 /* State machine to track the state of the line number program. */
20390 class lnp_state_machine
20393 /* Initialize a machine state for the start of a line number
20395 lnp_state_machine (gdbarch
*arch
, line_header
*lh
, bool record_lines_p
);
20397 file_entry
*current_file ()
20399 /* lh->file_names is 0-based, but the file name numbers in the
20400 statement program are 1-based. */
20401 return m_line_header
->file_name_at (m_file
);
20404 /* Record the line in the state machine. END_SEQUENCE is true if
20405 we're processing the end of a sequence. */
20406 void record_line (bool end_sequence
);
20408 /* Check address and if invalid nop-out the rest of the lines in this
20410 void check_line_address (struct dwarf2_cu
*cu
,
20411 const gdb_byte
*line_ptr
,
20412 CORE_ADDR lowpc
, CORE_ADDR address
);
20414 void handle_set_discriminator (unsigned int discriminator
)
20416 m_discriminator
= discriminator
;
20417 m_line_has_non_zero_discriminator
|= discriminator
!= 0;
20420 /* Handle DW_LNE_set_address. */
20421 void handle_set_address (CORE_ADDR baseaddr
, CORE_ADDR address
)
20424 address
+= baseaddr
;
20425 m_address
= gdbarch_adjust_dwarf2_line (m_gdbarch
, address
, false);
20428 /* Handle DW_LNS_advance_pc. */
20429 void handle_advance_pc (CORE_ADDR adjust
);
20431 /* Handle a special opcode. */
20432 void handle_special_opcode (unsigned char op_code
);
20434 /* Handle DW_LNS_advance_line. */
20435 void handle_advance_line (int line_delta
)
20437 advance_line (line_delta
);
20440 /* Handle DW_LNS_set_file. */
20441 void handle_set_file (file_name_index file
);
20443 /* Handle DW_LNS_negate_stmt. */
20444 void handle_negate_stmt ()
20446 m_is_stmt
= !m_is_stmt
;
20449 /* Handle DW_LNS_const_add_pc. */
20450 void handle_const_add_pc ();
20452 /* Handle DW_LNS_fixed_advance_pc. */
20453 void handle_fixed_advance_pc (CORE_ADDR addr_adj
)
20455 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20459 /* Handle DW_LNS_copy. */
20460 void handle_copy ()
20462 record_line (false);
20463 m_discriminator
= 0;
20466 /* Handle DW_LNE_end_sequence. */
20467 void handle_end_sequence ()
20469 m_record_line_callback
= ::record_line
;
20473 /* Advance the line by LINE_DELTA. */
20474 void advance_line (int line_delta
)
20476 m_line
+= line_delta
;
20478 if (line_delta
!= 0)
20479 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
20482 gdbarch
*m_gdbarch
;
20484 /* True if we're recording lines.
20485 Otherwise we're building partial symtabs and are just interested in
20486 finding include files mentioned by the line number program. */
20487 bool m_record_lines_p
;
20489 /* The line number header. */
20490 line_header
*m_line_header
;
20492 /* These are part of the standard DWARF line number state machine,
20493 and initialized according to the DWARF spec. */
20495 unsigned char m_op_index
= 0;
20496 /* The line table index (1-based) of the current file. */
20497 file_name_index m_file
= (file_name_index
) 1;
20498 unsigned int m_line
= 1;
20500 /* These are initialized in the constructor. */
20502 CORE_ADDR m_address
;
20504 unsigned int m_discriminator
;
20506 /* Additional bits of state we need to track. */
20508 /* The last file that we called dwarf2_start_subfile for.
20509 This is only used for TLLs. */
20510 unsigned int m_last_file
= 0;
20511 /* The last file a line number was recorded for. */
20512 struct subfile
*m_last_subfile
= NULL
;
20514 /* The function to call to record a line. */
20515 record_line_ftype
*m_record_line_callback
= NULL
;
20517 /* The last line number that was recorded, used to coalesce
20518 consecutive entries for the same line. This can happen, for
20519 example, when discriminators are present. PR 17276. */
20520 unsigned int m_last_line
= 0;
20521 bool m_line_has_non_zero_discriminator
= false;
20525 lnp_state_machine::handle_advance_pc (CORE_ADDR adjust
)
20527 CORE_ADDR addr_adj
= (((m_op_index
+ adjust
)
20528 / m_line_header
->maximum_ops_per_instruction
)
20529 * m_line_header
->minimum_instruction_length
);
20530 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20531 m_op_index
= ((m_op_index
+ adjust
)
20532 % m_line_header
->maximum_ops_per_instruction
);
20536 lnp_state_machine::handle_special_opcode (unsigned char op_code
)
20538 unsigned char adj_opcode
= op_code
- m_line_header
->opcode_base
;
20539 CORE_ADDR addr_adj
= (((m_op_index
20540 + (adj_opcode
/ m_line_header
->line_range
))
20541 / m_line_header
->maximum_ops_per_instruction
)
20542 * m_line_header
->minimum_instruction_length
);
20543 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20544 m_op_index
= ((m_op_index
+ (adj_opcode
/ m_line_header
->line_range
))
20545 % m_line_header
->maximum_ops_per_instruction
);
20547 int line_delta
= (m_line_header
->line_base
20548 + (adj_opcode
% m_line_header
->line_range
));
20549 advance_line (line_delta
);
20550 record_line (false);
20551 m_discriminator
= 0;
20555 lnp_state_machine::handle_set_file (file_name_index file
)
20559 const file_entry
*fe
= current_file ();
20561 dwarf2_debug_line_missing_file_complaint ();
20562 else if (m_record_lines_p
)
20564 const char *dir
= fe
->include_dir (m_line_header
);
20566 m_last_subfile
= current_subfile
;
20567 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
20568 dwarf2_start_subfile (fe
->name
, dir
);
20573 lnp_state_machine::handle_const_add_pc ()
20576 = (255 - m_line_header
->opcode_base
) / m_line_header
->line_range
;
20579 = (((m_op_index
+ adjust
)
20580 / m_line_header
->maximum_ops_per_instruction
)
20581 * m_line_header
->minimum_instruction_length
);
20583 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20584 m_op_index
= ((m_op_index
+ adjust
)
20585 % m_line_header
->maximum_ops_per_instruction
);
20588 /* Ignore this record_line request. */
20591 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
20596 /* Return non-zero if we should add LINE to the line number table.
20597 LINE is the line to add, LAST_LINE is the last line that was added,
20598 LAST_SUBFILE is the subfile for LAST_LINE.
20599 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
20600 had a non-zero discriminator.
20602 We have to be careful in the presence of discriminators.
20603 E.g., for this line:
20605 for (i = 0; i < 100000; i++);
20607 clang can emit four line number entries for that one line,
20608 each with a different discriminator.
20609 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
20611 However, we want gdb to coalesce all four entries into one.
20612 Otherwise the user could stepi into the middle of the line and
20613 gdb would get confused about whether the pc really was in the
20614 middle of the line.
20616 Things are further complicated by the fact that two consecutive
20617 line number entries for the same line is a heuristic used by gcc
20618 to denote the end of the prologue. So we can't just discard duplicate
20619 entries, we have to be selective about it. The heuristic we use is
20620 that we only collapse consecutive entries for the same line if at least
20621 one of those entries has a non-zero discriminator. PR 17276.
20623 Note: Addresses in the line number state machine can never go backwards
20624 within one sequence, thus this coalescing is ok. */
20627 dwarf_record_line_p (unsigned int line
, unsigned int last_line
,
20628 int line_has_non_zero_discriminator
,
20629 struct subfile
*last_subfile
)
20631 if (current_subfile
!= last_subfile
)
20633 if (line
!= last_line
)
20635 /* Same line for the same file that we've seen already.
20636 As a last check, for pr 17276, only record the line if the line
20637 has never had a non-zero discriminator. */
20638 if (!line_has_non_zero_discriminator
)
20643 /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS
20644 in the line table of subfile SUBFILE. */
20647 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20648 unsigned int line
, CORE_ADDR address
,
20649 record_line_ftype p_record_line
)
20651 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
20653 if (dwarf_line_debug
)
20655 fprintf_unfiltered (gdb_stdlog
,
20656 "Recording line %u, file %s, address %s\n",
20657 line
, lbasename (subfile
->name
),
20658 paddress (gdbarch
, address
));
20661 (*p_record_line
) (subfile
, line
, addr
);
20664 /* Subroutine of dwarf_decode_lines_1 to simplify it.
20665 Mark the end of a set of line number records.
20666 The arguments are the same as for dwarf_record_line_1.
20667 If SUBFILE is NULL the request is ignored. */
20670 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20671 CORE_ADDR address
, record_line_ftype p_record_line
)
20673 if (subfile
== NULL
)
20676 if (dwarf_line_debug
)
20678 fprintf_unfiltered (gdb_stdlog
,
20679 "Finishing current line, file %s, address %s\n",
20680 lbasename (subfile
->name
),
20681 paddress (gdbarch
, address
));
20684 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, p_record_line
);
20688 lnp_state_machine::record_line (bool end_sequence
)
20690 if (dwarf_line_debug
)
20692 fprintf_unfiltered (gdb_stdlog
,
20693 "Processing actual line %u: file %u,"
20694 " address %s, is_stmt %u, discrim %u\n",
20695 m_line
, to_underlying (m_file
),
20696 paddress (m_gdbarch
, m_address
),
20697 m_is_stmt
, m_discriminator
);
20700 file_entry
*fe
= current_file ();
20703 dwarf2_debug_line_missing_file_complaint ();
20704 /* For now we ignore lines not starting on an instruction boundary.
20705 But not when processing end_sequence for compatibility with the
20706 previous version of the code. */
20707 else if (m_op_index
== 0 || end_sequence
)
20709 fe
->included_p
= 1;
20710 if (m_record_lines_p
&& m_is_stmt
)
20712 if (m_last_subfile
!= current_subfile
|| end_sequence
)
20714 dwarf_finish_line (m_gdbarch
, m_last_subfile
,
20715 m_address
, m_record_line_callback
);
20720 if (dwarf_record_line_p (m_line
, m_last_line
,
20721 m_line_has_non_zero_discriminator
,
20724 dwarf_record_line_1 (m_gdbarch
, current_subfile
,
20726 m_record_line_callback
);
20728 m_last_subfile
= current_subfile
;
20729 m_last_line
= m_line
;
20735 lnp_state_machine::lnp_state_machine (gdbarch
*arch
, line_header
*lh
,
20736 bool record_lines_p
)
20739 m_record_lines_p
= record_lines_p
;
20740 m_line_header
= lh
;
20742 m_record_line_callback
= ::record_line
;
20744 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
20745 was a line entry for it so that the backend has a chance to adjust it
20746 and also record it in case it needs it. This is currently used by MIPS
20747 code, cf. `mips_adjust_dwarf2_line'. */
20748 m_address
= gdbarch_adjust_dwarf2_line (arch
, 0, 0);
20749 m_is_stmt
= lh
->default_is_stmt
;
20750 m_discriminator
= 0;
20754 lnp_state_machine::check_line_address (struct dwarf2_cu
*cu
,
20755 const gdb_byte
*line_ptr
,
20756 CORE_ADDR lowpc
, CORE_ADDR address
)
20758 /* If address < lowpc then it's not a usable value, it's outside the
20759 pc range of the CU. However, we restrict the test to only address
20760 values of zero to preserve GDB's previous behaviour which is to
20761 handle the specific case of a function being GC'd by the linker. */
20763 if (address
== 0 && address
< lowpc
)
20765 /* This line table is for a function which has been
20766 GCd by the linker. Ignore it. PR gdb/12528 */
20768 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20769 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
20771 complaint (&symfile_complaints
,
20772 _(".debug_line address at offset 0x%lx is 0 [in module %s]"),
20773 line_offset
, objfile_name (objfile
));
20774 m_record_line_callback
= noop_record_line
;
20775 /* Note: record_line_callback is left as noop_record_line until
20776 we see DW_LNE_end_sequence. */
20780 /* Subroutine of dwarf_decode_lines to simplify it.
20781 Process the line number information in LH.
20782 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
20783 program in order to set included_p for every referenced header. */
20786 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
20787 const int decode_for_pst_p
, CORE_ADDR lowpc
)
20789 const gdb_byte
*line_ptr
, *extended_end
;
20790 const gdb_byte
*line_end
;
20791 unsigned int bytes_read
, extended_len
;
20792 unsigned char op_code
, extended_op
;
20793 CORE_ADDR baseaddr
;
20794 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20795 bfd
*abfd
= objfile
->obfd
;
20796 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
20797 /* True if we're recording line info (as opposed to building partial
20798 symtabs and just interested in finding include files mentioned by
20799 the line number program). */
20800 bool record_lines_p
= !decode_for_pst_p
;
20802 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
20804 line_ptr
= lh
->statement_program_start
;
20805 line_end
= lh
->statement_program_end
;
20807 /* Read the statement sequences until there's nothing left. */
20808 while (line_ptr
< line_end
)
20810 /* The DWARF line number program state machine. Reset the state
20811 machine at the start of each sequence. */
20812 lnp_state_machine
state_machine (gdbarch
, lh
, record_lines_p
);
20813 bool end_sequence
= false;
20815 if (record_lines_p
)
20817 /* Start a subfile for the current file of the state
20819 const file_entry
*fe
= state_machine
.current_file ();
20822 dwarf2_start_subfile (fe
->name
, fe
->include_dir (lh
));
20825 /* Decode the table. */
20826 while (line_ptr
< line_end
&& !end_sequence
)
20828 op_code
= read_1_byte (abfd
, line_ptr
);
20831 if (op_code
>= lh
->opcode_base
)
20833 /* Special opcode. */
20834 state_machine
.handle_special_opcode (op_code
);
20836 else switch (op_code
)
20838 case DW_LNS_extended_op
:
20839 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
20841 line_ptr
+= bytes_read
;
20842 extended_end
= line_ptr
+ extended_len
;
20843 extended_op
= read_1_byte (abfd
, line_ptr
);
20845 switch (extended_op
)
20847 case DW_LNE_end_sequence
:
20848 state_machine
.handle_end_sequence ();
20849 end_sequence
= true;
20851 case DW_LNE_set_address
:
20854 = read_address (abfd
, line_ptr
, cu
, &bytes_read
);
20855 line_ptr
+= bytes_read
;
20857 state_machine
.check_line_address (cu
, line_ptr
,
20859 state_machine
.handle_set_address (baseaddr
, address
);
20862 case DW_LNE_define_file
:
20864 const char *cur_file
;
20865 unsigned int mod_time
, length
;
20868 cur_file
= read_direct_string (abfd
, line_ptr
,
20870 line_ptr
+= bytes_read
;
20871 dindex
= (dir_index
)
20872 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20873 line_ptr
+= bytes_read
;
20875 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20876 line_ptr
+= bytes_read
;
20878 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20879 line_ptr
+= bytes_read
;
20880 lh
->add_file_name (cur_file
, dindex
, mod_time
, length
);
20883 case DW_LNE_set_discriminator
:
20885 /* The discriminator is not interesting to the
20886 debugger; just ignore it. We still need to
20887 check its value though:
20888 if there are consecutive entries for the same
20889 (non-prologue) line we want to coalesce them.
20892 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20893 line_ptr
+= bytes_read
;
20895 state_machine
.handle_set_discriminator (discr
);
20899 complaint (&symfile_complaints
,
20900 _("mangled .debug_line section"));
20903 /* Make sure that we parsed the extended op correctly. If e.g.
20904 we expected a different address size than the producer used,
20905 we may have read the wrong number of bytes. */
20906 if (line_ptr
!= extended_end
)
20908 complaint (&symfile_complaints
,
20909 _("mangled .debug_line section"));
20914 state_machine
.handle_copy ();
20916 case DW_LNS_advance_pc
:
20919 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20920 line_ptr
+= bytes_read
;
20922 state_machine
.handle_advance_pc (adjust
);
20925 case DW_LNS_advance_line
:
20928 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
20929 line_ptr
+= bytes_read
;
20931 state_machine
.handle_advance_line (line_delta
);
20934 case DW_LNS_set_file
:
20936 file_name_index file
20937 = (file_name_index
) read_unsigned_leb128 (abfd
, line_ptr
,
20939 line_ptr
+= bytes_read
;
20941 state_machine
.handle_set_file (file
);
20944 case DW_LNS_set_column
:
20945 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20946 line_ptr
+= bytes_read
;
20948 case DW_LNS_negate_stmt
:
20949 state_machine
.handle_negate_stmt ();
20951 case DW_LNS_set_basic_block
:
20953 /* Add to the address register of the state machine the
20954 address increment value corresponding to special opcode
20955 255. I.e., this value is scaled by the minimum
20956 instruction length since special opcode 255 would have
20957 scaled the increment. */
20958 case DW_LNS_const_add_pc
:
20959 state_machine
.handle_const_add_pc ();
20961 case DW_LNS_fixed_advance_pc
:
20963 CORE_ADDR addr_adj
= read_2_bytes (abfd
, line_ptr
);
20966 state_machine
.handle_fixed_advance_pc (addr_adj
);
20971 /* Unknown standard opcode, ignore it. */
20974 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
20976 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20977 line_ptr
+= bytes_read
;
20984 dwarf2_debug_line_missing_end_sequence_complaint ();
20986 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
20987 in which case we still finish recording the last line). */
20988 state_machine
.record_line (true);
20992 /* Decode the Line Number Program (LNP) for the given line_header
20993 structure and CU. The actual information extracted and the type
20994 of structures created from the LNP depends on the value of PST.
20996 1. If PST is NULL, then this procedure uses the data from the program
20997 to create all necessary symbol tables, and their linetables.
20999 2. If PST is not NULL, this procedure reads the program to determine
21000 the list of files included by the unit represented by PST, and
21001 builds all the associated partial symbol tables.
21003 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
21004 It is used for relative paths in the line table.
21005 NOTE: When processing partial symtabs (pst != NULL),
21006 comp_dir == pst->dirname.
21008 NOTE: It is important that psymtabs have the same file name (via strcmp)
21009 as the corresponding symtab. Since COMP_DIR is not used in the name of the
21010 symtab we don't use it in the name of the psymtabs we create.
21011 E.g. expand_line_sal requires this when finding psymtabs to expand.
21012 A good testcase for this is mb-inline.exp.
21014 LOWPC is the lowest address in CU (or 0 if not known).
21016 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
21017 for its PC<->lines mapping information. Otherwise only the filename
21018 table is read in. */
21021 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
21022 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
21023 CORE_ADDR lowpc
, int decode_mapping
)
21025 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21026 const int decode_for_pst_p
= (pst
!= NULL
);
21028 if (decode_mapping
)
21029 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
21031 if (decode_for_pst_p
)
21035 /* Now that we're done scanning the Line Header Program, we can
21036 create the psymtab of each included file. */
21037 for (file_index
= 0; file_index
< lh
->file_names
.size (); file_index
++)
21038 if (lh
->file_names
[file_index
].included_p
== 1)
21040 gdb::unique_xmalloc_ptr
<char> name_holder
;
21041 const char *include_name
=
21042 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
,
21044 if (include_name
!= NULL
)
21045 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
21050 /* Make sure a symtab is created for every file, even files
21051 which contain only variables (i.e. no code with associated
21053 struct compunit_symtab
*cust
= buildsym_compunit_symtab ();
21056 for (i
= 0; i
< lh
->file_names
.size (); i
++)
21058 file_entry
&fe
= lh
->file_names
[i
];
21060 dwarf2_start_subfile (fe
.name
, fe
.include_dir (lh
));
21062 if (current_subfile
->symtab
== NULL
)
21064 current_subfile
->symtab
21065 = allocate_symtab (cust
, current_subfile
->name
);
21067 fe
.symtab
= current_subfile
->symtab
;
21072 /* Start a subfile for DWARF. FILENAME is the name of the file and
21073 DIRNAME the name of the source directory which contains FILENAME
21074 or NULL if not known.
21075 This routine tries to keep line numbers from identical absolute and
21076 relative file names in a common subfile.
21078 Using the `list' example from the GDB testsuite, which resides in
21079 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
21080 of /srcdir/list0.c yields the following debugging information for list0.c:
21082 DW_AT_name: /srcdir/list0.c
21083 DW_AT_comp_dir: /compdir
21084 files.files[0].name: list0.h
21085 files.files[0].dir: /srcdir
21086 files.files[1].name: list0.c
21087 files.files[1].dir: /srcdir
21089 The line number information for list0.c has to end up in a single
21090 subfile, so that `break /srcdir/list0.c:1' works as expected.
21091 start_subfile will ensure that this happens provided that we pass the
21092 concatenation of files.files[1].dir and files.files[1].name as the
21096 dwarf2_start_subfile (const char *filename
, const char *dirname
)
21100 /* In order not to lose the line information directory,
21101 we concatenate it to the filename when it makes sense.
21102 Note that the Dwarf3 standard says (speaking of filenames in line
21103 information): ``The directory index is ignored for file names
21104 that represent full path names''. Thus ignoring dirname in the
21105 `else' branch below isn't an issue. */
21107 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
21109 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
21113 start_subfile (filename
);
21119 /* Start a symtab for DWARF.
21120 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
21122 static struct compunit_symtab
*
21123 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
21124 const char *name
, const char *comp_dir
, CORE_ADDR low_pc
)
21126 struct compunit_symtab
*cust
21127 = start_symtab (cu
->per_cu
->dwarf2_per_objfile
->objfile
, name
, comp_dir
,
21128 low_pc
, cu
->language
);
21130 record_debugformat ("DWARF 2");
21131 record_producer (cu
->producer
);
21133 /* We assume that we're processing GCC output. */
21134 processing_gcc_compilation
= 2;
21136 cu
->processing_has_namespace_info
= 0;
21142 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
21143 struct dwarf2_cu
*cu
)
21145 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21146 struct comp_unit_head
*cu_header
= &cu
->header
;
21148 /* NOTE drow/2003-01-30: There used to be a comment and some special
21149 code here to turn a symbol with DW_AT_external and a
21150 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
21151 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
21152 with some versions of binutils) where shared libraries could have
21153 relocations against symbols in their debug information - the
21154 minimal symbol would have the right address, but the debug info
21155 would not. It's no longer necessary, because we will explicitly
21156 apply relocations when we read in the debug information now. */
21158 /* A DW_AT_location attribute with no contents indicates that a
21159 variable has been optimized away. */
21160 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
21162 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
21166 /* Handle one degenerate form of location expression specially, to
21167 preserve GDB's previous behavior when section offsets are
21168 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
21169 then mark this symbol as LOC_STATIC. */
21171 if (attr_form_is_block (attr
)
21172 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
21173 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
21174 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
21175 && (DW_BLOCK (attr
)->size
21176 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
21178 unsigned int dummy
;
21180 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
21181 SYMBOL_VALUE_ADDRESS (sym
) =
21182 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
21184 SYMBOL_VALUE_ADDRESS (sym
) =
21185 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
21186 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
21187 fixup_symbol_section (sym
, objfile
);
21188 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
21189 SYMBOL_SECTION (sym
));
21193 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
21194 expression evaluator, and use LOC_COMPUTED only when necessary
21195 (i.e. when the value of a register or memory location is
21196 referenced, or a thread-local block, etc.). Then again, it might
21197 not be worthwhile. I'm assuming that it isn't unless performance
21198 or memory numbers show me otherwise. */
21200 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
21202 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
21203 cu
->has_loclist
= 1;
21206 /* Given a pointer to a DWARF information entry, figure out if we need
21207 to make a symbol table entry for it, and if so, create a new entry
21208 and return a pointer to it.
21209 If TYPE is NULL, determine symbol type from the die, otherwise
21210 used the passed type.
21211 If SPACE is not NULL, use it to hold the new symbol. If it is
21212 NULL, allocate a new symbol on the objfile's obstack. */
21214 static struct symbol
*
21215 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
21216 struct symbol
*space
)
21218 struct dwarf2_per_objfile
*dwarf2_per_objfile
21219 = cu
->per_cu
->dwarf2_per_objfile
;
21220 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21221 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
21222 struct symbol
*sym
= NULL
;
21224 struct attribute
*attr
= NULL
;
21225 struct attribute
*attr2
= NULL
;
21226 CORE_ADDR baseaddr
;
21227 struct pending
**list_to_add
= NULL
;
21229 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
21231 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
21233 name
= dwarf2_name (die
, cu
);
21236 const char *linkagename
;
21237 int suppress_add
= 0;
21242 sym
= allocate_symbol (objfile
);
21243 OBJSTAT (objfile
, n_syms
++);
21245 /* Cache this symbol's name and the name's demangled form (if any). */
21246 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
21247 linkagename
= dwarf2_physname (name
, die
, cu
);
21248 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
21250 /* Fortran does not have mangling standard and the mangling does differ
21251 between gfortran, iFort etc. */
21252 if (cu
->language
== language_fortran
21253 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
21254 symbol_set_demangled_name (&(sym
->ginfo
),
21255 dwarf2_full_name (name
, die
, cu
),
21258 /* Default assumptions.
21259 Use the passed type or decode it from the die. */
21260 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21261 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
21263 SYMBOL_TYPE (sym
) = type
;
21265 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
21266 attr
= dwarf2_attr (die
,
21267 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
21271 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
21274 attr
= dwarf2_attr (die
,
21275 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
21279 file_name_index file_index
= (file_name_index
) DW_UNSND (attr
);
21280 struct file_entry
*fe
;
21282 if (cu
->line_header
!= NULL
)
21283 fe
= cu
->line_header
->file_name_at (file_index
);
21288 complaint (&symfile_complaints
,
21289 _("file index out of range"));
21291 symbol_set_symtab (sym
, fe
->symtab
);
21297 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
21302 addr
= attr_value_as_address (attr
);
21303 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
21304 SYMBOL_VALUE_ADDRESS (sym
) = addr
;
21306 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
21307 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
21308 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
21309 add_symbol_to_list (sym
, cu
->list_in_scope
);
21311 case DW_TAG_subprogram
:
21312 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
21314 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
21315 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21316 if ((attr2
&& (DW_UNSND (attr2
) != 0))
21317 || cu
->language
== language_ada
)
21319 /* Subprograms marked external are stored as a global symbol.
21320 Ada subprograms, whether marked external or not, are always
21321 stored as a global symbol, because we want to be able to
21322 access them globally. For instance, we want to be able
21323 to break on a nested subprogram without having to
21324 specify the context. */
21325 list_to_add
= &global_symbols
;
21329 list_to_add
= cu
->list_in_scope
;
21332 case DW_TAG_inlined_subroutine
:
21333 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
21335 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
21336 SYMBOL_INLINED (sym
) = 1;
21337 list_to_add
= cu
->list_in_scope
;
21339 case DW_TAG_template_value_param
:
21341 /* Fall through. */
21342 case DW_TAG_constant
:
21343 case DW_TAG_variable
:
21344 case DW_TAG_member
:
21345 /* Compilation with minimal debug info may result in
21346 variables with missing type entries. Change the
21347 misleading `void' type to something sensible. */
21348 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
21349 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_int
;
21351 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21352 /* In the case of DW_TAG_member, we should only be called for
21353 static const members. */
21354 if (die
->tag
== DW_TAG_member
)
21356 /* dwarf2_add_field uses die_is_declaration,
21357 so we do the same. */
21358 gdb_assert (die_is_declaration (die
, cu
));
21363 dwarf2_const_value (attr
, sym
, cu
);
21364 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21367 if (attr2
&& (DW_UNSND (attr2
) != 0))
21368 list_to_add
= &global_symbols
;
21370 list_to_add
= cu
->list_in_scope
;
21374 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21377 var_decode_location (attr
, sym
, cu
);
21378 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21380 /* Fortran explicitly imports any global symbols to the local
21381 scope by DW_TAG_common_block. */
21382 if (cu
->language
== language_fortran
&& die
->parent
21383 && die
->parent
->tag
== DW_TAG_common_block
)
21386 if (SYMBOL_CLASS (sym
) == LOC_STATIC
21387 && SYMBOL_VALUE_ADDRESS (sym
) == 0
21388 && !dwarf2_per_objfile
->has_section_at_zero
)
21390 /* When a static variable is eliminated by the linker,
21391 the corresponding debug information is not stripped
21392 out, but the variable address is set to null;
21393 do not add such variables into symbol table. */
21395 else if (attr2
&& (DW_UNSND (attr2
) != 0))
21397 /* Workaround gfortran PR debug/40040 - it uses
21398 DW_AT_location for variables in -fPIC libraries which may
21399 get overriden by other libraries/executable and get
21400 a different address. Resolve it by the minimal symbol
21401 which may come from inferior's executable using copy
21402 relocation. Make this workaround only for gfortran as for
21403 other compilers GDB cannot guess the minimal symbol
21404 Fortran mangling kind. */
21405 if (cu
->language
== language_fortran
&& die
->parent
21406 && die
->parent
->tag
== DW_TAG_module
21408 && startswith (cu
->producer
, "GNU Fortran"))
21409 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
21411 /* A variable with DW_AT_external is never static,
21412 but it may be block-scoped. */
21413 list_to_add
= (cu
->list_in_scope
== &file_symbols
21414 ? &global_symbols
: cu
->list_in_scope
);
21417 list_to_add
= cu
->list_in_scope
;
21421 /* We do not know the address of this symbol.
21422 If it is an external symbol and we have type information
21423 for it, enter the symbol as a LOC_UNRESOLVED symbol.
21424 The address of the variable will then be determined from
21425 the minimal symbol table whenever the variable is
21427 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21429 /* Fortran explicitly imports any global symbols to the local
21430 scope by DW_TAG_common_block. */
21431 if (cu
->language
== language_fortran
&& die
->parent
21432 && die
->parent
->tag
== DW_TAG_common_block
)
21434 /* SYMBOL_CLASS doesn't matter here because
21435 read_common_block is going to reset it. */
21437 list_to_add
= cu
->list_in_scope
;
21439 else if (attr2
&& (DW_UNSND (attr2
) != 0)
21440 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
21442 /* A variable with DW_AT_external is never static, but it
21443 may be block-scoped. */
21444 list_to_add
= (cu
->list_in_scope
== &file_symbols
21445 ? &global_symbols
: cu
->list_in_scope
);
21447 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
21449 else if (!die_is_declaration (die
, cu
))
21451 /* Use the default LOC_OPTIMIZED_OUT class. */
21452 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
21454 list_to_add
= cu
->list_in_scope
;
21458 case DW_TAG_formal_parameter
:
21459 /* If we are inside a function, mark this as an argument. If
21460 not, we might be looking at an argument to an inlined function
21461 when we do not have enough information to show inlined frames;
21462 pretend it's a local variable in that case so that the user can
21464 if (context_stack_depth
> 0
21465 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
21466 SYMBOL_IS_ARGUMENT (sym
) = 1;
21467 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21470 var_decode_location (attr
, sym
, cu
);
21472 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21475 dwarf2_const_value (attr
, sym
, cu
);
21478 list_to_add
= cu
->list_in_scope
;
21480 case DW_TAG_unspecified_parameters
:
21481 /* From varargs functions; gdb doesn't seem to have any
21482 interest in this information, so just ignore it for now.
21485 case DW_TAG_template_type_param
:
21487 /* Fall through. */
21488 case DW_TAG_class_type
:
21489 case DW_TAG_interface_type
:
21490 case DW_TAG_structure_type
:
21491 case DW_TAG_union_type
:
21492 case DW_TAG_set_type
:
21493 case DW_TAG_enumeration_type
:
21494 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21495 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
21498 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
21499 really ever be static objects: otherwise, if you try
21500 to, say, break of a class's method and you're in a file
21501 which doesn't mention that class, it won't work unless
21502 the check for all static symbols in lookup_symbol_aux
21503 saves you. See the OtherFileClass tests in
21504 gdb.c++/namespace.exp. */
21508 list_to_add
= (cu
->list_in_scope
== &file_symbols
21509 && cu
->language
== language_cplus
21510 ? &global_symbols
: cu
->list_in_scope
);
21512 /* The semantics of C++ state that "struct foo {
21513 ... }" also defines a typedef for "foo". */
21514 if (cu
->language
== language_cplus
21515 || cu
->language
== language_ada
21516 || cu
->language
== language_d
21517 || cu
->language
== language_rust
)
21519 /* The symbol's name is already allocated along
21520 with this objfile, so we don't need to
21521 duplicate it for the type. */
21522 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
21523 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
21528 case DW_TAG_typedef
:
21529 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21530 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21531 list_to_add
= cu
->list_in_scope
;
21533 case DW_TAG_base_type
:
21534 case DW_TAG_subrange_type
:
21535 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21536 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21537 list_to_add
= cu
->list_in_scope
;
21539 case DW_TAG_enumerator
:
21540 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21543 dwarf2_const_value (attr
, sym
, cu
);
21546 /* NOTE: carlton/2003-11-10: See comment above in the
21547 DW_TAG_class_type, etc. block. */
21549 list_to_add
= (cu
->list_in_scope
== &file_symbols
21550 && cu
->language
== language_cplus
21551 ? &global_symbols
: cu
->list_in_scope
);
21554 case DW_TAG_imported_declaration
:
21555 case DW_TAG_namespace
:
21556 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21557 list_to_add
= &global_symbols
;
21559 case DW_TAG_module
:
21560 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21561 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
21562 list_to_add
= &global_symbols
;
21564 case DW_TAG_common_block
:
21565 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
21566 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
21567 add_symbol_to_list (sym
, cu
->list_in_scope
);
21570 /* Not a tag we recognize. Hopefully we aren't processing
21571 trash data, but since we must specifically ignore things
21572 we don't recognize, there is nothing else we should do at
21574 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
21575 dwarf_tag_name (die
->tag
));
21581 sym
->hash_next
= objfile
->template_symbols
;
21582 objfile
->template_symbols
= sym
;
21583 list_to_add
= NULL
;
21586 if (list_to_add
!= NULL
)
21587 add_symbol_to_list (sym
, list_to_add
);
21589 /* For the benefit of old versions of GCC, check for anonymous
21590 namespaces based on the demangled name. */
21591 if (!cu
->processing_has_namespace_info
21592 && cu
->language
== language_cplus
)
21593 cp_scan_for_anonymous_namespaces (sym
, objfile
);
21598 /* Given an attr with a DW_FORM_dataN value in host byte order,
21599 zero-extend it as appropriate for the symbol's type. The DWARF
21600 standard (v4) is not entirely clear about the meaning of using
21601 DW_FORM_dataN for a constant with a signed type, where the type is
21602 wider than the data. The conclusion of a discussion on the DWARF
21603 list was that this is unspecified. We choose to always zero-extend
21604 because that is the interpretation long in use by GCC. */
21607 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
21608 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
21610 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21611 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
21612 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
21613 LONGEST l
= DW_UNSND (attr
);
21615 if (bits
< sizeof (*value
) * 8)
21617 l
&= ((LONGEST
) 1 << bits
) - 1;
21620 else if (bits
== sizeof (*value
) * 8)
21624 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
21625 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
21632 /* Read a constant value from an attribute. Either set *VALUE, or if
21633 the value does not fit in *VALUE, set *BYTES - either already
21634 allocated on the objfile obstack, or newly allocated on OBSTACK,
21635 or, set *BATON, if we translated the constant to a location
21639 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
21640 const char *name
, struct obstack
*obstack
,
21641 struct dwarf2_cu
*cu
,
21642 LONGEST
*value
, const gdb_byte
**bytes
,
21643 struct dwarf2_locexpr_baton
**baton
)
21645 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21646 struct comp_unit_head
*cu_header
= &cu
->header
;
21647 struct dwarf_block
*blk
;
21648 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
21649 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
21655 switch (attr
->form
)
21658 case DW_FORM_GNU_addr_index
:
21662 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
21663 dwarf2_const_value_length_mismatch_complaint (name
,
21664 cu_header
->addr_size
,
21665 TYPE_LENGTH (type
));
21666 /* Symbols of this form are reasonably rare, so we just
21667 piggyback on the existing location code rather than writing
21668 a new implementation of symbol_computed_ops. */
21669 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
21670 (*baton
)->per_cu
= cu
->per_cu
;
21671 gdb_assert ((*baton
)->per_cu
);
21673 (*baton
)->size
= 2 + cu_header
->addr_size
;
21674 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
21675 (*baton
)->data
= data
;
21677 data
[0] = DW_OP_addr
;
21678 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
21679 byte_order
, DW_ADDR (attr
));
21680 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
21683 case DW_FORM_string
:
21685 case DW_FORM_GNU_str_index
:
21686 case DW_FORM_GNU_strp_alt
:
21687 /* DW_STRING is already allocated on the objfile obstack, point
21689 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
21691 case DW_FORM_block1
:
21692 case DW_FORM_block2
:
21693 case DW_FORM_block4
:
21694 case DW_FORM_block
:
21695 case DW_FORM_exprloc
:
21696 case DW_FORM_data16
:
21697 blk
= DW_BLOCK (attr
);
21698 if (TYPE_LENGTH (type
) != blk
->size
)
21699 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
21700 TYPE_LENGTH (type
));
21701 *bytes
= blk
->data
;
21704 /* The DW_AT_const_value attributes are supposed to carry the
21705 symbol's value "represented as it would be on the target
21706 architecture." By the time we get here, it's already been
21707 converted to host endianness, so we just need to sign- or
21708 zero-extend it as appropriate. */
21709 case DW_FORM_data1
:
21710 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
21712 case DW_FORM_data2
:
21713 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
21715 case DW_FORM_data4
:
21716 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
21718 case DW_FORM_data8
:
21719 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
21722 case DW_FORM_sdata
:
21723 case DW_FORM_implicit_const
:
21724 *value
= DW_SND (attr
);
21727 case DW_FORM_udata
:
21728 *value
= DW_UNSND (attr
);
21732 complaint (&symfile_complaints
,
21733 _("unsupported const value attribute form: '%s'"),
21734 dwarf_form_name (attr
->form
));
21741 /* Copy constant value from an attribute to a symbol. */
21744 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
21745 struct dwarf2_cu
*cu
)
21747 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21749 const gdb_byte
*bytes
;
21750 struct dwarf2_locexpr_baton
*baton
;
21752 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
21753 SYMBOL_PRINT_NAME (sym
),
21754 &objfile
->objfile_obstack
, cu
,
21755 &value
, &bytes
, &baton
);
21759 SYMBOL_LOCATION_BATON (sym
) = baton
;
21760 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
21762 else if (bytes
!= NULL
)
21764 SYMBOL_VALUE_BYTES (sym
) = bytes
;
21765 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
21769 SYMBOL_VALUE (sym
) = value
;
21770 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
21774 /* Return the type of the die in question using its DW_AT_type attribute. */
21776 static struct type
*
21777 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21779 struct attribute
*type_attr
;
21781 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
21784 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21785 /* A missing DW_AT_type represents a void type. */
21786 return objfile_type (objfile
)->builtin_void
;
21789 return lookup_die_type (die
, type_attr
, cu
);
21792 /* True iff CU's producer generates GNAT Ada auxiliary information
21793 that allows to find parallel types through that information instead
21794 of having to do expensive parallel lookups by type name. */
21797 need_gnat_info (struct dwarf2_cu
*cu
)
21799 /* Assume that the Ada compiler was GNAT, which always produces
21800 the auxiliary information. */
21801 return (cu
->language
== language_ada
);
21804 /* Return the auxiliary type of the die in question using its
21805 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
21806 attribute is not present. */
21808 static struct type
*
21809 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21811 struct attribute
*type_attr
;
21813 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
21817 return lookup_die_type (die
, type_attr
, cu
);
21820 /* If DIE has a descriptive_type attribute, then set the TYPE's
21821 descriptive type accordingly. */
21824 set_descriptive_type (struct type
*type
, struct die_info
*die
,
21825 struct dwarf2_cu
*cu
)
21827 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
21829 if (descriptive_type
)
21831 ALLOCATE_GNAT_AUX_TYPE (type
);
21832 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
21836 /* Return the containing type of the die in question using its
21837 DW_AT_containing_type attribute. */
21839 static struct type
*
21840 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21842 struct attribute
*type_attr
;
21843 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21845 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
21847 error (_("Dwarf Error: Problem turning containing type into gdb type "
21848 "[in module %s]"), objfile_name (objfile
));
21850 return lookup_die_type (die
, type_attr
, cu
);
21853 /* Return an error marker type to use for the ill formed type in DIE/CU. */
21855 static struct type
*
21856 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
21858 struct dwarf2_per_objfile
*dwarf2_per_objfile
21859 = cu
->per_cu
->dwarf2_per_objfile
;
21860 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21861 char *message
, *saved
;
21863 message
= xstrprintf (_("<unknown type in %s, CU %s, DIE %s>"),
21864 objfile_name (objfile
),
21865 sect_offset_str (cu
->header
.sect_off
),
21866 sect_offset_str (die
->sect_off
));
21867 saved
= (char *) obstack_copy0 (&objfile
->objfile_obstack
,
21868 message
, strlen (message
));
21871 return init_type (objfile
, TYPE_CODE_ERROR
, 0, saved
);
21874 /* Look up the type of DIE in CU using its type attribute ATTR.
21875 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
21876 DW_AT_containing_type.
21877 If there is no type substitute an error marker. */
21879 static struct type
*
21880 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
21881 struct dwarf2_cu
*cu
)
21883 struct dwarf2_per_objfile
*dwarf2_per_objfile
21884 = cu
->per_cu
->dwarf2_per_objfile
;
21885 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21886 struct type
*this_type
;
21888 gdb_assert (attr
->name
== DW_AT_type
21889 || attr
->name
== DW_AT_GNAT_descriptive_type
21890 || attr
->name
== DW_AT_containing_type
);
21892 /* First see if we have it cached. */
21894 if (attr
->form
== DW_FORM_GNU_ref_alt
)
21896 struct dwarf2_per_cu_data
*per_cu
;
21897 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
21899 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, 1,
21900 dwarf2_per_objfile
);
21901 this_type
= get_die_type_at_offset (sect_off
, per_cu
);
21903 else if (attr_form_is_ref (attr
))
21905 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
21907 this_type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
21909 else if (attr
->form
== DW_FORM_ref_sig8
)
21911 ULONGEST signature
= DW_SIGNATURE (attr
);
21913 return get_signatured_type (die
, signature
, cu
);
21917 complaint (&symfile_complaints
,
21918 _("Dwarf Error: Bad type attribute %s in DIE"
21919 " at %s [in module %s]"),
21920 dwarf_attr_name (attr
->name
), sect_offset_str (die
->sect_off
),
21921 objfile_name (objfile
));
21922 return build_error_marker_type (cu
, die
);
21925 /* If not cached we need to read it in. */
21927 if (this_type
== NULL
)
21929 struct die_info
*type_die
= NULL
;
21930 struct dwarf2_cu
*type_cu
= cu
;
21932 if (attr_form_is_ref (attr
))
21933 type_die
= follow_die_ref (die
, attr
, &type_cu
);
21934 if (type_die
== NULL
)
21935 return build_error_marker_type (cu
, die
);
21936 /* If we find the type now, it's probably because the type came
21937 from an inter-CU reference and the type's CU got expanded before
21939 this_type
= read_type_die (type_die
, type_cu
);
21942 /* If we still don't have a type use an error marker. */
21944 if (this_type
== NULL
)
21945 return build_error_marker_type (cu
, die
);
21950 /* Return the type in DIE, CU.
21951 Returns NULL for invalid types.
21953 This first does a lookup in die_type_hash,
21954 and only reads the die in if necessary.
21956 NOTE: This can be called when reading in partial or full symbols. */
21958 static struct type
*
21959 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
21961 struct type
*this_type
;
21963 this_type
= get_die_type (die
, cu
);
21967 return read_type_die_1 (die
, cu
);
21970 /* Read the type in DIE, CU.
21971 Returns NULL for invalid types. */
21973 static struct type
*
21974 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
21976 struct type
*this_type
= NULL
;
21980 case DW_TAG_class_type
:
21981 case DW_TAG_interface_type
:
21982 case DW_TAG_structure_type
:
21983 case DW_TAG_union_type
:
21984 this_type
= read_structure_type (die
, cu
);
21986 case DW_TAG_enumeration_type
:
21987 this_type
= read_enumeration_type (die
, cu
);
21989 case DW_TAG_subprogram
:
21990 case DW_TAG_subroutine_type
:
21991 case DW_TAG_inlined_subroutine
:
21992 this_type
= read_subroutine_type (die
, cu
);
21994 case DW_TAG_array_type
:
21995 this_type
= read_array_type (die
, cu
);
21997 case DW_TAG_set_type
:
21998 this_type
= read_set_type (die
, cu
);
22000 case DW_TAG_pointer_type
:
22001 this_type
= read_tag_pointer_type (die
, cu
);
22003 case DW_TAG_ptr_to_member_type
:
22004 this_type
= read_tag_ptr_to_member_type (die
, cu
);
22006 case DW_TAG_reference_type
:
22007 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_REF
);
22009 case DW_TAG_rvalue_reference_type
:
22010 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_RVALUE_REF
);
22012 case DW_TAG_const_type
:
22013 this_type
= read_tag_const_type (die
, cu
);
22015 case DW_TAG_volatile_type
:
22016 this_type
= read_tag_volatile_type (die
, cu
);
22018 case DW_TAG_restrict_type
:
22019 this_type
= read_tag_restrict_type (die
, cu
);
22021 case DW_TAG_string_type
:
22022 this_type
= read_tag_string_type (die
, cu
);
22024 case DW_TAG_typedef
:
22025 this_type
= read_typedef (die
, cu
);
22027 case DW_TAG_subrange_type
:
22028 this_type
= read_subrange_type (die
, cu
);
22030 case DW_TAG_base_type
:
22031 this_type
= read_base_type (die
, cu
);
22033 case DW_TAG_unspecified_type
:
22034 this_type
= read_unspecified_type (die
, cu
);
22036 case DW_TAG_namespace
:
22037 this_type
= read_namespace_type (die
, cu
);
22039 case DW_TAG_module
:
22040 this_type
= read_module_type (die
, cu
);
22042 case DW_TAG_atomic_type
:
22043 this_type
= read_tag_atomic_type (die
, cu
);
22046 complaint (&symfile_complaints
,
22047 _("unexpected tag in read_type_die: '%s'"),
22048 dwarf_tag_name (die
->tag
));
22055 /* See if we can figure out if the class lives in a namespace. We do
22056 this by looking for a member function; its demangled name will
22057 contain namespace info, if there is any.
22058 Return the computed name or NULL.
22059 Space for the result is allocated on the objfile's obstack.
22060 This is the full-die version of guess_partial_die_structure_name.
22061 In this case we know DIE has no useful parent. */
22064 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
22066 struct die_info
*spec_die
;
22067 struct dwarf2_cu
*spec_cu
;
22068 struct die_info
*child
;
22069 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22072 spec_die
= die_specification (die
, &spec_cu
);
22073 if (spec_die
!= NULL
)
22079 for (child
= die
->child
;
22081 child
= child
->sibling
)
22083 if (child
->tag
== DW_TAG_subprogram
)
22085 const char *linkage_name
= dw2_linkage_name (child
, cu
);
22087 if (linkage_name
!= NULL
)
22090 = language_class_name_from_physname (cu
->language_defn
,
22094 if (actual_name
!= NULL
)
22096 const char *die_name
= dwarf2_name (die
, cu
);
22098 if (die_name
!= NULL
22099 && strcmp (die_name
, actual_name
) != 0)
22101 /* Strip off the class name from the full name.
22102 We want the prefix. */
22103 int die_name_len
= strlen (die_name
);
22104 int actual_name_len
= strlen (actual_name
);
22106 /* Test for '::' as a sanity check. */
22107 if (actual_name_len
> die_name_len
+ 2
22108 && actual_name
[actual_name_len
22109 - die_name_len
- 1] == ':')
22110 name
= (char *) obstack_copy0 (
22111 &objfile
->per_bfd
->storage_obstack
,
22112 actual_name
, actual_name_len
- die_name_len
- 2);
22115 xfree (actual_name
);
22124 /* GCC might emit a nameless typedef that has a linkage name. Determine the
22125 prefix part in such case. See
22126 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
22128 static const char *
22129 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
22131 struct attribute
*attr
;
22134 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
22135 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
22138 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
22141 attr
= dw2_linkage_name_attr (die
, cu
);
22142 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
22145 /* dwarf2_name had to be already called. */
22146 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
22148 /* Strip the base name, keep any leading namespaces/classes. */
22149 base
= strrchr (DW_STRING (attr
), ':');
22150 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
22153 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22154 return (char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
22156 &base
[-1] - DW_STRING (attr
));
22159 /* Return the name of the namespace/class that DIE is defined within,
22160 or "" if we can't tell. The caller should not xfree the result.
22162 For example, if we're within the method foo() in the following
22172 then determine_prefix on foo's die will return "N::C". */
22174 static const char *
22175 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
22177 struct dwarf2_per_objfile
*dwarf2_per_objfile
22178 = cu
->per_cu
->dwarf2_per_objfile
;
22179 struct die_info
*parent
, *spec_die
;
22180 struct dwarf2_cu
*spec_cu
;
22181 struct type
*parent_type
;
22182 const char *retval
;
22184 if (cu
->language
!= language_cplus
22185 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
22186 && cu
->language
!= language_rust
)
22189 retval
= anonymous_struct_prefix (die
, cu
);
22193 /* We have to be careful in the presence of DW_AT_specification.
22194 For example, with GCC 3.4, given the code
22198 // Definition of N::foo.
22202 then we'll have a tree of DIEs like this:
22204 1: DW_TAG_compile_unit
22205 2: DW_TAG_namespace // N
22206 3: DW_TAG_subprogram // declaration of N::foo
22207 4: DW_TAG_subprogram // definition of N::foo
22208 DW_AT_specification // refers to die #3
22210 Thus, when processing die #4, we have to pretend that we're in
22211 the context of its DW_AT_specification, namely the contex of die
22214 spec_die
= die_specification (die
, &spec_cu
);
22215 if (spec_die
== NULL
)
22216 parent
= die
->parent
;
22219 parent
= spec_die
->parent
;
22223 if (parent
== NULL
)
22225 else if (parent
->building_fullname
)
22228 const char *parent_name
;
22230 /* It has been seen on RealView 2.2 built binaries,
22231 DW_TAG_template_type_param types actually _defined_ as
22232 children of the parent class:
22235 template class <class Enum> Class{};
22236 Class<enum E> class_e;
22238 1: DW_TAG_class_type (Class)
22239 2: DW_TAG_enumeration_type (E)
22240 3: DW_TAG_enumerator (enum1:0)
22241 3: DW_TAG_enumerator (enum2:1)
22243 2: DW_TAG_template_type_param
22244 DW_AT_type DW_FORM_ref_udata (E)
22246 Besides being broken debug info, it can put GDB into an
22247 infinite loop. Consider:
22249 When we're building the full name for Class<E>, we'll start
22250 at Class, and go look over its template type parameters,
22251 finding E. We'll then try to build the full name of E, and
22252 reach here. We're now trying to build the full name of E,
22253 and look over the parent DIE for containing scope. In the
22254 broken case, if we followed the parent DIE of E, we'd again
22255 find Class, and once again go look at its template type
22256 arguments, etc., etc. Simply don't consider such parent die
22257 as source-level parent of this die (it can't be, the language
22258 doesn't allow it), and break the loop here. */
22259 name
= dwarf2_name (die
, cu
);
22260 parent_name
= dwarf2_name (parent
, cu
);
22261 complaint (&symfile_complaints
,
22262 _("template param type '%s' defined within parent '%s'"),
22263 name
? name
: "<unknown>",
22264 parent_name
? parent_name
: "<unknown>");
22268 switch (parent
->tag
)
22270 case DW_TAG_namespace
:
22271 parent_type
= read_type_die (parent
, cu
);
22272 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
22273 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
22274 Work around this problem here. */
22275 if (cu
->language
== language_cplus
22276 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
22278 /* We give a name to even anonymous namespaces. */
22279 return TYPE_TAG_NAME (parent_type
);
22280 case DW_TAG_class_type
:
22281 case DW_TAG_interface_type
:
22282 case DW_TAG_structure_type
:
22283 case DW_TAG_union_type
:
22284 case DW_TAG_module
:
22285 parent_type
= read_type_die (parent
, cu
);
22286 if (TYPE_TAG_NAME (parent_type
) != NULL
)
22287 return TYPE_TAG_NAME (parent_type
);
22289 /* An anonymous structure is only allowed non-static data
22290 members; no typedefs, no member functions, et cetera.
22291 So it does not need a prefix. */
22293 case DW_TAG_compile_unit
:
22294 case DW_TAG_partial_unit
:
22295 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
22296 if (cu
->language
== language_cplus
22297 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
22298 && die
->child
!= NULL
22299 && (die
->tag
== DW_TAG_class_type
22300 || die
->tag
== DW_TAG_structure_type
22301 || die
->tag
== DW_TAG_union_type
))
22303 char *name
= guess_full_die_structure_name (die
, cu
);
22308 case DW_TAG_enumeration_type
:
22309 parent_type
= read_type_die (parent
, cu
);
22310 if (TYPE_DECLARED_CLASS (parent_type
))
22312 if (TYPE_TAG_NAME (parent_type
) != NULL
)
22313 return TYPE_TAG_NAME (parent_type
);
22316 /* Fall through. */
22318 return determine_prefix (parent
, cu
);
22322 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
22323 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
22324 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
22325 an obconcat, otherwise allocate storage for the result. The CU argument is
22326 used to determine the language and hence, the appropriate separator. */
22328 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
22331 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
22332 int physname
, struct dwarf2_cu
*cu
)
22334 const char *lead
= "";
22337 if (suffix
== NULL
|| suffix
[0] == '\0'
22338 || prefix
== NULL
|| prefix
[0] == '\0')
22340 else if (cu
->language
== language_d
)
22342 /* For D, the 'main' function could be defined in any module, but it
22343 should never be prefixed. */
22344 if (strcmp (suffix
, "D main") == 0)
22352 else if (cu
->language
== language_fortran
&& physname
)
22354 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
22355 DW_AT_MIPS_linkage_name is preferred and used instead. */
22363 if (prefix
== NULL
)
22365 if (suffix
== NULL
)
22372 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
22374 strcpy (retval
, lead
);
22375 strcat (retval
, prefix
);
22376 strcat (retval
, sep
);
22377 strcat (retval
, suffix
);
22382 /* We have an obstack. */
22383 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
22387 /* Return sibling of die, NULL if no sibling. */
22389 static struct die_info
*
22390 sibling_die (struct die_info
*die
)
22392 return die
->sibling
;
22395 /* Get name of a die, return NULL if not found. */
22397 static const char *
22398 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
22399 struct obstack
*obstack
)
22401 if (name
&& cu
->language
== language_cplus
)
22403 std::string canon_name
= cp_canonicalize_string (name
);
22405 if (!canon_name
.empty ())
22407 if (canon_name
!= name
)
22408 name
= (const char *) obstack_copy0 (obstack
,
22409 canon_name
.c_str (),
22410 canon_name
.length ());
22417 /* Get name of a die, return NULL if not found.
22418 Anonymous namespaces are converted to their magic string. */
22420 static const char *
22421 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
22423 struct attribute
*attr
;
22424 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22426 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
22427 if ((!attr
|| !DW_STRING (attr
))
22428 && die
->tag
!= DW_TAG_namespace
22429 && die
->tag
!= DW_TAG_class_type
22430 && die
->tag
!= DW_TAG_interface_type
22431 && die
->tag
!= DW_TAG_structure_type
22432 && die
->tag
!= DW_TAG_union_type
)
22437 case DW_TAG_compile_unit
:
22438 case DW_TAG_partial_unit
:
22439 /* Compilation units have a DW_AT_name that is a filename, not
22440 a source language identifier. */
22441 case DW_TAG_enumeration_type
:
22442 case DW_TAG_enumerator
:
22443 /* These tags always have simple identifiers already; no need
22444 to canonicalize them. */
22445 return DW_STRING (attr
);
22447 case DW_TAG_namespace
:
22448 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
22449 return DW_STRING (attr
);
22450 return CP_ANONYMOUS_NAMESPACE_STR
;
22452 case DW_TAG_class_type
:
22453 case DW_TAG_interface_type
:
22454 case DW_TAG_structure_type
:
22455 case DW_TAG_union_type
:
22456 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
22457 structures or unions. These were of the form "._%d" in GCC 4.1,
22458 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
22459 and GCC 4.4. We work around this problem by ignoring these. */
22460 if (attr
&& DW_STRING (attr
)
22461 && (startswith (DW_STRING (attr
), "._")
22462 || startswith (DW_STRING (attr
), "<anonymous")))
22465 /* GCC might emit a nameless typedef that has a linkage name. See
22466 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
22467 if (!attr
|| DW_STRING (attr
) == NULL
)
22469 char *demangled
= NULL
;
22471 attr
= dw2_linkage_name_attr (die
, cu
);
22472 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
22475 /* Avoid demangling DW_STRING (attr) the second time on a second
22476 call for the same DIE. */
22477 if (!DW_STRING_IS_CANONICAL (attr
))
22478 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
22484 /* FIXME: we already did this for the partial symbol... */
22487 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
22488 demangled
, strlen (demangled
)));
22489 DW_STRING_IS_CANONICAL (attr
) = 1;
22492 /* Strip any leading namespaces/classes, keep only the base name.
22493 DW_AT_name for named DIEs does not contain the prefixes. */
22494 base
= strrchr (DW_STRING (attr
), ':');
22495 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
22498 return DW_STRING (attr
);
22507 if (!DW_STRING_IS_CANONICAL (attr
))
22510 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
22511 &objfile
->per_bfd
->storage_obstack
);
22512 DW_STRING_IS_CANONICAL (attr
) = 1;
22514 return DW_STRING (attr
);
22517 /* Return the die that this die in an extension of, or NULL if there
22518 is none. *EXT_CU is the CU containing DIE on input, and the CU
22519 containing the return value on output. */
22521 static struct die_info
*
22522 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
22524 struct attribute
*attr
;
22526 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
22530 return follow_die_ref (die
, attr
, ext_cu
);
22533 /* Convert a DIE tag into its string name. */
22535 static const char *
22536 dwarf_tag_name (unsigned tag
)
22538 const char *name
= get_DW_TAG_name (tag
);
22541 return "DW_TAG_<unknown>";
22546 /* Convert a DWARF attribute code into its string name. */
22548 static const char *
22549 dwarf_attr_name (unsigned attr
)
22553 #ifdef MIPS /* collides with DW_AT_HP_block_index */
22554 if (attr
== DW_AT_MIPS_fde
)
22555 return "DW_AT_MIPS_fde";
22557 if (attr
== DW_AT_HP_block_index
)
22558 return "DW_AT_HP_block_index";
22561 name
= get_DW_AT_name (attr
);
22564 return "DW_AT_<unknown>";
22569 /* Convert a DWARF value form code into its string name. */
22571 static const char *
22572 dwarf_form_name (unsigned form
)
22574 const char *name
= get_DW_FORM_name (form
);
22577 return "DW_FORM_<unknown>";
22582 static const char *
22583 dwarf_bool_name (unsigned mybool
)
22591 /* Convert a DWARF type code into its string name. */
22593 static const char *
22594 dwarf_type_encoding_name (unsigned enc
)
22596 const char *name
= get_DW_ATE_name (enc
);
22599 return "DW_ATE_<unknown>";
22605 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
22609 print_spaces (indent
, f
);
22610 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset %s)\n",
22611 dwarf_tag_name (die
->tag
), die
->abbrev
,
22612 sect_offset_str (die
->sect_off
));
22614 if (die
->parent
!= NULL
)
22616 print_spaces (indent
, f
);
22617 fprintf_unfiltered (f
, " parent at offset: %s\n",
22618 sect_offset_str (die
->parent
->sect_off
));
22621 print_spaces (indent
, f
);
22622 fprintf_unfiltered (f
, " has children: %s\n",
22623 dwarf_bool_name (die
->child
!= NULL
));
22625 print_spaces (indent
, f
);
22626 fprintf_unfiltered (f
, " attributes:\n");
22628 for (i
= 0; i
< die
->num_attrs
; ++i
)
22630 print_spaces (indent
, f
);
22631 fprintf_unfiltered (f
, " %s (%s) ",
22632 dwarf_attr_name (die
->attrs
[i
].name
),
22633 dwarf_form_name (die
->attrs
[i
].form
));
22635 switch (die
->attrs
[i
].form
)
22638 case DW_FORM_GNU_addr_index
:
22639 fprintf_unfiltered (f
, "address: ");
22640 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
22642 case DW_FORM_block2
:
22643 case DW_FORM_block4
:
22644 case DW_FORM_block
:
22645 case DW_FORM_block1
:
22646 fprintf_unfiltered (f
, "block: size %s",
22647 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
22649 case DW_FORM_exprloc
:
22650 fprintf_unfiltered (f
, "expression: size %s",
22651 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
22653 case DW_FORM_data16
:
22654 fprintf_unfiltered (f
, "constant of 16 bytes");
22656 case DW_FORM_ref_addr
:
22657 fprintf_unfiltered (f
, "ref address: ");
22658 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
22660 case DW_FORM_GNU_ref_alt
:
22661 fprintf_unfiltered (f
, "alt ref address: ");
22662 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
22668 case DW_FORM_ref_udata
:
22669 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
22670 (long) (DW_UNSND (&die
->attrs
[i
])));
22672 case DW_FORM_data1
:
22673 case DW_FORM_data2
:
22674 case DW_FORM_data4
:
22675 case DW_FORM_data8
:
22676 case DW_FORM_udata
:
22677 case DW_FORM_sdata
:
22678 fprintf_unfiltered (f
, "constant: %s",
22679 pulongest (DW_UNSND (&die
->attrs
[i
])));
22681 case DW_FORM_sec_offset
:
22682 fprintf_unfiltered (f
, "section offset: %s",
22683 pulongest (DW_UNSND (&die
->attrs
[i
])));
22685 case DW_FORM_ref_sig8
:
22686 fprintf_unfiltered (f
, "signature: %s",
22687 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
22689 case DW_FORM_string
:
22691 case DW_FORM_line_strp
:
22692 case DW_FORM_GNU_str_index
:
22693 case DW_FORM_GNU_strp_alt
:
22694 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
22695 DW_STRING (&die
->attrs
[i
])
22696 ? DW_STRING (&die
->attrs
[i
]) : "",
22697 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
22700 if (DW_UNSND (&die
->attrs
[i
]))
22701 fprintf_unfiltered (f
, "flag: TRUE");
22703 fprintf_unfiltered (f
, "flag: FALSE");
22705 case DW_FORM_flag_present
:
22706 fprintf_unfiltered (f
, "flag: TRUE");
22708 case DW_FORM_indirect
:
22709 /* The reader will have reduced the indirect form to
22710 the "base form" so this form should not occur. */
22711 fprintf_unfiltered (f
,
22712 "unexpected attribute form: DW_FORM_indirect");
22714 case DW_FORM_implicit_const
:
22715 fprintf_unfiltered (f
, "constant: %s",
22716 plongest (DW_SND (&die
->attrs
[i
])));
22719 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
22720 die
->attrs
[i
].form
);
22723 fprintf_unfiltered (f
, "\n");
22728 dump_die_for_error (struct die_info
*die
)
22730 dump_die_shallow (gdb_stderr
, 0, die
);
22734 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
22736 int indent
= level
* 4;
22738 gdb_assert (die
!= NULL
);
22740 if (level
>= max_level
)
22743 dump_die_shallow (f
, indent
, die
);
22745 if (die
->child
!= NULL
)
22747 print_spaces (indent
, f
);
22748 fprintf_unfiltered (f
, " Children:");
22749 if (level
+ 1 < max_level
)
22751 fprintf_unfiltered (f
, "\n");
22752 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
22756 fprintf_unfiltered (f
,
22757 " [not printed, max nesting level reached]\n");
22761 if (die
->sibling
!= NULL
&& level
> 0)
22763 dump_die_1 (f
, level
, max_level
, die
->sibling
);
22767 /* This is called from the pdie macro in gdbinit.in.
22768 It's not static so gcc will keep a copy callable from gdb. */
22771 dump_die (struct die_info
*die
, int max_level
)
22773 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
22777 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
22781 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
,
22782 to_underlying (die
->sect_off
),
22788 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
22792 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
22794 if (attr_form_is_ref (attr
))
22795 return (sect_offset
) DW_UNSND (attr
);
22797 complaint (&symfile_complaints
,
22798 _("unsupported die ref attribute form: '%s'"),
22799 dwarf_form_name (attr
->form
));
22803 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
22804 * the value held by the attribute is not constant. */
22807 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
22809 if (attr
->form
== DW_FORM_sdata
|| attr
->form
== DW_FORM_implicit_const
)
22810 return DW_SND (attr
);
22811 else if (attr
->form
== DW_FORM_udata
22812 || attr
->form
== DW_FORM_data1
22813 || attr
->form
== DW_FORM_data2
22814 || attr
->form
== DW_FORM_data4
22815 || attr
->form
== DW_FORM_data8
)
22816 return DW_UNSND (attr
);
22819 /* For DW_FORM_data16 see attr_form_is_constant. */
22820 complaint (&symfile_complaints
,
22821 _("Attribute value is not a constant (%s)"),
22822 dwarf_form_name (attr
->form
));
22823 return default_value
;
22827 /* Follow reference or signature attribute ATTR of SRC_DIE.
22828 On entry *REF_CU is the CU of SRC_DIE.
22829 On exit *REF_CU is the CU of the result. */
22831 static struct die_info
*
22832 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
22833 struct dwarf2_cu
**ref_cu
)
22835 struct die_info
*die
;
22837 if (attr_form_is_ref (attr
))
22838 die
= follow_die_ref (src_die
, attr
, ref_cu
);
22839 else if (attr
->form
== DW_FORM_ref_sig8
)
22840 die
= follow_die_sig (src_die
, attr
, ref_cu
);
22843 dump_die_for_error (src_die
);
22844 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
22845 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
22851 /* Follow reference OFFSET.
22852 On entry *REF_CU is the CU of the source die referencing OFFSET.
22853 On exit *REF_CU is the CU of the result.
22854 Returns NULL if OFFSET is invalid. */
22856 static struct die_info
*
22857 follow_die_offset (sect_offset sect_off
, int offset_in_dwz
,
22858 struct dwarf2_cu
**ref_cu
)
22860 struct die_info temp_die
;
22861 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
22862 struct dwarf2_per_objfile
*dwarf2_per_objfile
22863 = cu
->per_cu
->dwarf2_per_objfile
;
22865 gdb_assert (cu
->per_cu
!= NULL
);
22869 if (cu
->per_cu
->is_debug_types
)
22871 /* .debug_types CUs cannot reference anything outside their CU.
22872 If they need to, they have to reference a signatured type via
22873 DW_FORM_ref_sig8. */
22874 if (!offset_in_cu_p (&cu
->header
, sect_off
))
22877 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
22878 || !offset_in_cu_p (&cu
->header
, sect_off
))
22880 struct dwarf2_per_cu_data
*per_cu
;
22882 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
22883 dwarf2_per_objfile
);
22885 /* If necessary, add it to the queue and load its DIEs. */
22886 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
22887 load_full_comp_unit (per_cu
, cu
->language
);
22889 target_cu
= per_cu
->cu
;
22891 else if (cu
->dies
== NULL
)
22893 /* We're loading full DIEs during partial symbol reading. */
22894 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
22895 load_full_comp_unit (cu
->per_cu
, language_minimal
);
22898 *ref_cu
= target_cu
;
22899 temp_die
.sect_off
= sect_off
;
22900 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
22902 to_underlying (sect_off
));
22905 /* Follow reference attribute ATTR of SRC_DIE.
22906 On entry *REF_CU is the CU of SRC_DIE.
22907 On exit *REF_CU is the CU of the result. */
22909 static struct die_info
*
22910 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
22911 struct dwarf2_cu
**ref_cu
)
22913 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
22914 struct dwarf2_cu
*cu
= *ref_cu
;
22915 struct die_info
*die
;
22917 die
= follow_die_offset (sect_off
,
22918 (attr
->form
== DW_FORM_GNU_ref_alt
22919 || cu
->per_cu
->is_dwz
),
22922 error (_("Dwarf Error: Cannot find DIE at %s referenced from DIE "
22923 "at %s [in module %s]"),
22924 sect_offset_str (sect_off
), sect_offset_str (src_die
->sect_off
),
22925 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
22930 /* Return DWARF block referenced by DW_AT_location of DIE at SECT_OFF at PER_CU.
22931 Returned value is intended for DW_OP_call*. Returned
22932 dwarf2_locexpr_baton->data has lifetime of
22933 PER_CU->DWARF2_PER_OBJFILE->OBJFILE. */
22935 struct dwarf2_locexpr_baton
22936 dwarf2_fetch_die_loc_sect_off (sect_offset sect_off
,
22937 struct dwarf2_per_cu_data
*per_cu
,
22938 CORE_ADDR (*get_frame_pc
) (void *baton
),
22941 struct dwarf2_cu
*cu
;
22942 struct die_info
*die
;
22943 struct attribute
*attr
;
22944 struct dwarf2_locexpr_baton retval
;
22945 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
22946 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22948 if (per_cu
->cu
== NULL
)
22953 /* We shouldn't get here for a dummy CU, but don't crash on the user.
22954 Instead just throw an error, not much else we can do. */
22955 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
22956 sect_offset_str (sect_off
), objfile_name (objfile
));
22959 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22961 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
22962 sect_offset_str (sect_off
), objfile_name (objfile
));
22964 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
22967 /* DWARF: "If there is no such attribute, then there is no effect.".
22968 DATA is ignored if SIZE is 0. */
22970 retval
.data
= NULL
;
22973 else if (attr_form_is_section_offset (attr
))
22975 struct dwarf2_loclist_baton loclist_baton
;
22976 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
22979 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
22981 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
22983 retval
.size
= size
;
22987 if (!attr_form_is_block (attr
))
22988 error (_("Dwarf Error: DIE at %s referenced in module %s "
22989 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
22990 sect_offset_str (sect_off
), objfile_name (objfile
));
22992 retval
.data
= DW_BLOCK (attr
)->data
;
22993 retval
.size
= DW_BLOCK (attr
)->size
;
22995 retval
.per_cu
= cu
->per_cu
;
22997 age_cached_comp_units (dwarf2_per_objfile
);
23002 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
23005 struct dwarf2_locexpr_baton
23006 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
23007 struct dwarf2_per_cu_data
*per_cu
,
23008 CORE_ADDR (*get_frame_pc
) (void *baton
),
23011 sect_offset sect_off
= per_cu
->sect_off
+ to_underlying (offset_in_cu
);
23013 return dwarf2_fetch_die_loc_sect_off (sect_off
, per_cu
, get_frame_pc
, baton
);
23016 /* Write a constant of a given type as target-ordered bytes into
23019 static const gdb_byte
*
23020 write_constant_as_bytes (struct obstack
*obstack
,
23021 enum bfd_endian byte_order
,
23028 *len
= TYPE_LENGTH (type
);
23029 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
23030 store_unsigned_integer (result
, *len
, byte_order
, value
);
23035 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
23036 pointer to the constant bytes and set LEN to the length of the
23037 data. If memory is needed, allocate it on OBSTACK. If the DIE
23038 does not have a DW_AT_const_value, return NULL. */
23041 dwarf2_fetch_constant_bytes (sect_offset sect_off
,
23042 struct dwarf2_per_cu_data
*per_cu
,
23043 struct obstack
*obstack
,
23046 struct dwarf2_cu
*cu
;
23047 struct die_info
*die
;
23048 struct attribute
*attr
;
23049 const gdb_byte
*result
= NULL
;
23052 enum bfd_endian byte_order
;
23053 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
23055 if (per_cu
->cu
== NULL
)
23060 /* We shouldn't get here for a dummy CU, but don't crash on the user.
23061 Instead just throw an error, not much else we can do. */
23062 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
23063 sect_offset_str (sect_off
), objfile_name (objfile
));
23066 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23068 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
23069 sect_offset_str (sect_off
), objfile_name (objfile
));
23071 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
23075 byte_order
= (bfd_big_endian (objfile
->obfd
)
23076 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
23078 switch (attr
->form
)
23081 case DW_FORM_GNU_addr_index
:
23085 *len
= cu
->header
.addr_size
;
23086 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
23087 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
23091 case DW_FORM_string
:
23093 case DW_FORM_GNU_str_index
:
23094 case DW_FORM_GNU_strp_alt
:
23095 /* DW_STRING is already allocated on the objfile obstack, point
23097 result
= (const gdb_byte
*) DW_STRING (attr
);
23098 *len
= strlen (DW_STRING (attr
));
23100 case DW_FORM_block1
:
23101 case DW_FORM_block2
:
23102 case DW_FORM_block4
:
23103 case DW_FORM_block
:
23104 case DW_FORM_exprloc
:
23105 case DW_FORM_data16
:
23106 result
= DW_BLOCK (attr
)->data
;
23107 *len
= DW_BLOCK (attr
)->size
;
23110 /* The DW_AT_const_value attributes are supposed to carry the
23111 symbol's value "represented as it would be on the target
23112 architecture." By the time we get here, it's already been
23113 converted to host endianness, so we just need to sign- or
23114 zero-extend it as appropriate. */
23115 case DW_FORM_data1
:
23116 type
= die_type (die
, cu
);
23117 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
23118 if (result
== NULL
)
23119 result
= write_constant_as_bytes (obstack
, byte_order
,
23122 case DW_FORM_data2
:
23123 type
= die_type (die
, cu
);
23124 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
23125 if (result
== NULL
)
23126 result
= write_constant_as_bytes (obstack
, byte_order
,
23129 case DW_FORM_data4
:
23130 type
= die_type (die
, cu
);
23131 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
23132 if (result
== NULL
)
23133 result
= write_constant_as_bytes (obstack
, byte_order
,
23136 case DW_FORM_data8
:
23137 type
= die_type (die
, cu
);
23138 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
23139 if (result
== NULL
)
23140 result
= write_constant_as_bytes (obstack
, byte_order
,
23144 case DW_FORM_sdata
:
23145 case DW_FORM_implicit_const
:
23146 type
= die_type (die
, cu
);
23147 result
= write_constant_as_bytes (obstack
, byte_order
,
23148 type
, DW_SND (attr
), len
);
23151 case DW_FORM_udata
:
23152 type
= die_type (die
, cu
);
23153 result
= write_constant_as_bytes (obstack
, byte_order
,
23154 type
, DW_UNSND (attr
), len
);
23158 complaint (&symfile_complaints
,
23159 _("unsupported const value attribute form: '%s'"),
23160 dwarf_form_name (attr
->form
));
23167 /* Return the type of the die at OFFSET in PER_CU. Return NULL if no
23168 valid type for this die is found. */
23171 dwarf2_fetch_die_type_sect_off (sect_offset sect_off
,
23172 struct dwarf2_per_cu_data
*per_cu
)
23174 struct dwarf2_cu
*cu
;
23175 struct die_info
*die
;
23177 if (per_cu
->cu
== NULL
)
23183 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23187 return die_type (die
, cu
);
23190 /* Return the type of the DIE at DIE_OFFSET in the CU named by
23194 dwarf2_get_die_type (cu_offset die_offset
,
23195 struct dwarf2_per_cu_data
*per_cu
)
23197 sect_offset die_offset_sect
= per_cu
->sect_off
+ to_underlying (die_offset
);
23198 return get_die_type_at_offset (die_offset_sect
, per_cu
);
23201 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
23202 On entry *REF_CU is the CU of SRC_DIE.
23203 On exit *REF_CU is the CU of the result.
23204 Returns NULL if the referenced DIE isn't found. */
23206 static struct die_info
*
23207 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
23208 struct dwarf2_cu
**ref_cu
)
23210 struct die_info temp_die
;
23211 struct dwarf2_cu
*sig_cu
;
23212 struct die_info
*die
;
23214 /* While it might be nice to assert sig_type->type == NULL here,
23215 we can get here for DW_AT_imported_declaration where we need
23216 the DIE not the type. */
23218 /* If necessary, add it to the queue and load its DIEs. */
23220 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
23221 read_signatured_type (sig_type
);
23223 sig_cu
= sig_type
->per_cu
.cu
;
23224 gdb_assert (sig_cu
!= NULL
);
23225 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
23226 temp_die
.sect_off
= sig_type
->type_offset_in_section
;
23227 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
23228 to_underlying (temp_die
.sect_off
));
23231 struct dwarf2_per_objfile
*dwarf2_per_objfile
23232 = (*ref_cu
)->per_cu
->dwarf2_per_objfile
;
23234 /* For .gdb_index version 7 keep track of included TUs.
23235 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
23236 if (dwarf2_per_objfile
->index_table
!= NULL
23237 && dwarf2_per_objfile
->index_table
->version
<= 7)
23239 VEC_safe_push (dwarf2_per_cu_ptr
,
23240 (*ref_cu
)->per_cu
->imported_symtabs
,
23251 /* Follow signatured type referenced by ATTR in SRC_DIE.
23252 On entry *REF_CU is the CU of SRC_DIE.
23253 On exit *REF_CU is the CU of the result.
23254 The result is the DIE of the type.
23255 If the referenced type cannot be found an error is thrown. */
23257 static struct die_info
*
23258 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
23259 struct dwarf2_cu
**ref_cu
)
23261 ULONGEST signature
= DW_SIGNATURE (attr
);
23262 struct signatured_type
*sig_type
;
23263 struct die_info
*die
;
23265 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
23267 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
23268 /* sig_type will be NULL if the signatured type is missing from
23270 if (sig_type
== NULL
)
23272 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
23273 " from DIE at %s [in module %s]"),
23274 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
23275 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23278 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
23281 dump_die_for_error (src_die
);
23282 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
23283 " from DIE at %s [in module %s]"),
23284 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
23285 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23291 /* Get the type specified by SIGNATURE referenced in DIE/CU,
23292 reading in and processing the type unit if necessary. */
23294 static struct type
*
23295 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
23296 struct dwarf2_cu
*cu
)
23298 struct dwarf2_per_objfile
*dwarf2_per_objfile
23299 = cu
->per_cu
->dwarf2_per_objfile
;
23300 struct signatured_type
*sig_type
;
23301 struct dwarf2_cu
*type_cu
;
23302 struct die_info
*type_die
;
23305 sig_type
= lookup_signatured_type (cu
, signature
);
23306 /* sig_type will be NULL if the signatured type is missing from
23308 if (sig_type
== NULL
)
23310 complaint (&symfile_complaints
,
23311 _("Dwarf Error: Cannot find signatured DIE %s referenced"
23312 " from DIE at %s [in module %s]"),
23313 hex_string (signature
), sect_offset_str (die
->sect_off
),
23314 objfile_name (dwarf2_per_objfile
->objfile
));
23315 return build_error_marker_type (cu
, die
);
23318 /* If we already know the type we're done. */
23319 if (sig_type
->type
!= NULL
)
23320 return sig_type
->type
;
23323 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
23324 if (type_die
!= NULL
)
23326 /* N.B. We need to call get_die_type to ensure only one type for this DIE
23327 is created. This is important, for example, because for c++ classes
23328 we need TYPE_NAME set which is only done by new_symbol. Blech. */
23329 type
= read_type_die (type_die
, type_cu
);
23332 complaint (&symfile_complaints
,
23333 _("Dwarf Error: Cannot build signatured type %s"
23334 " referenced from DIE at %s [in module %s]"),
23335 hex_string (signature
), sect_offset_str (die
->sect_off
),
23336 objfile_name (dwarf2_per_objfile
->objfile
));
23337 type
= build_error_marker_type (cu
, die
);
23342 complaint (&symfile_complaints
,
23343 _("Dwarf Error: Problem reading signatured DIE %s referenced"
23344 " from DIE at %s [in module %s]"),
23345 hex_string (signature
), sect_offset_str (die
->sect_off
),
23346 objfile_name (dwarf2_per_objfile
->objfile
));
23347 type
= build_error_marker_type (cu
, die
);
23349 sig_type
->type
= type
;
23354 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
23355 reading in and processing the type unit if necessary. */
23357 static struct type
*
23358 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
23359 struct dwarf2_cu
*cu
) /* ARI: editCase function */
23361 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
23362 if (attr_form_is_ref (attr
))
23364 struct dwarf2_cu
*type_cu
= cu
;
23365 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
23367 return read_type_die (type_die
, type_cu
);
23369 else if (attr
->form
== DW_FORM_ref_sig8
)
23371 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
23375 struct dwarf2_per_objfile
*dwarf2_per_objfile
23376 = cu
->per_cu
->dwarf2_per_objfile
;
23378 complaint (&symfile_complaints
,
23379 _("Dwarf Error: DW_AT_signature has bad form %s in DIE"
23380 " at %s [in module %s]"),
23381 dwarf_form_name (attr
->form
), sect_offset_str (die
->sect_off
),
23382 objfile_name (dwarf2_per_objfile
->objfile
));
23383 return build_error_marker_type (cu
, die
);
23387 /* Load the DIEs associated with type unit PER_CU into memory. */
23390 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
23392 struct signatured_type
*sig_type
;
23394 /* Caller is responsible for ensuring type_unit_groups don't get here. */
23395 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
23397 /* We have the per_cu, but we need the signatured_type.
23398 Fortunately this is an easy translation. */
23399 gdb_assert (per_cu
->is_debug_types
);
23400 sig_type
= (struct signatured_type
*) per_cu
;
23402 gdb_assert (per_cu
->cu
== NULL
);
23404 read_signatured_type (sig_type
);
23406 gdb_assert (per_cu
->cu
!= NULL
);
23409 /* die_reader_func for read_signatured_type.
23410 This is identical to load_full_comp_unit_reader,
23411 but is kept separate for now. */
23414 read_signatured_type_reader (const struct die_reader_specs
*reader
,
23415 const gdb_byte
*info_ptr
,
23416 struct die_info
*comp_unit_die
,
23420 struct dwarf2_cu
*cu
= reader
->cu
;
23422 gdb_assert (cu
->die_hash
== NULL
);
23424 htab_create_alloc_ex (cu
->header
.length
/ 12,
23428 &cu
->comp_unit_obstack
,
23429 hashtab_obstack_allocate
,
23430 dummy_obstack_deallocate
);
23433 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
23434 &info_ptr
, comp_unit_die
);
23435 cu
->dies
= comp_unit_die
;
23436 /* comp_unit_die is not stored in die_hash, no need. */
23438 /* We try not to read any attributes in this function, because not
23439 all CUs needed for references have been loaded yet, and symbol
23440 table processing isn't initialized. But we have to set the CU language,
23441 or we won't be able to build types correctly.
23442 Similarly, if we do not read the producer, we can not apply
23443 producer-specific interpretation. */
23444 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
23447 /* Read in a signatured type and build its CU and DIEs.
23448 If the type is a stub for the real type in a DWO file,
23449 read in the real type from the DWO file as well. */
23452 read_signatured_type (struct signatured_type
*sig_type
)
23454 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
23456 gdb_assert (per_cu
->is_debug_types
);
23457 gdb_assert (per_cu
->cu
== NULL
);
23459 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
23460 read_signatured_type_reader
, NULL
);
23461 sig_type
->per_cu
.tu_read
= 1;
23464 /* Decode simple location descriptions.
23465 Given a pointer to a dwarf block that defines a location, compute
23466 the location and return the value.
23468 NOTE drow/2003-11-18: This function is called in two situations
23469 now: for the address of static or global variables (partial symbols
23470 only) and for offsets into structures which are expected to be
23471 (more or less) constant. The partial symbol case should go away,
23472 and only the constant case should remain. That will let this
23473 function complain more accurately. A few special modes are allowed
23474 without complaint for global variables (for instance, global
23475 register values and thread-local values).
23477 A location description containing no operations indicates that the
23478 object is optimized out. The return value is 0 for that case.
23479 FIXME drow/2003-11-16: No callers check for this case any more; soon all
23480 callers will only want a very basic result and this can become a
23483 Note that stack[0] is unused except as a default error return. */
23486 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
23488 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
23490 size_t size
= blk
->size
;
23491 const gdb_byte
*data
= blk
->data
;
23492 CORE_ADDR stack
[64];
23494 unsigned int bytes_read
, unsnd
;
23500 stack
[++stacki
] = 0;
23539 stack
[++stacki
] = op
- DW_OP_lit0
;
23574 stack
[++stacki
] = op
- DW_OP_reg0
;
23576 dwarf2_complex_location_expr_complaint ();
23580 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
23582 stack
[++stacki
] = unsnd
;
23584 dwarf2_complex_location_expr_complaint ();
23588 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
23593 case DW_OP_const1u
:
23594 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
23598 case DW_OP_const1s
:
23599 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
23603 case DW_OP_const2u
:
23604 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
23608 case DW_OP_const2s
:
23609 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
23613 case DW_OP_const4u
:
23614 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
23618 case DW_OP_const4s
:
23619 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
23623 case DW_OP_const8u
:
23624 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
23629 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
23635 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
23640 stack
[stacki
+ 1] = stack
[stacki
];
23645 stack
[stacki
- 1] += stack
[stacki
];
23649 case DW_OP_plus_uconst
:
23650 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
23656 stack
[stacki
- 1] -= stack
[stacki
];
23661 /* If we're not the last op, then we definitely can't encode
23662 this using GDB's address_class enum. This is valid for partial
23663 global symbols, although the variable's address will be bogus
23666 dwarf2_complex_location_expr_complaint ();
23669 case DW_OP_GNU_push_tls_address
:
23670 case DW_OP_form_tls_address
:
23671 /* The top of the stack has the offset from the beginning
23672 of the thread control block at which the variable is located. */
23673 /* Nothing should follow this operator, so the top of stack would
23675 /* This is valid for partial global symbols, but the variable's
23676 address will be bogus in the psymtab. Make it always at least
23677 non-zero to not look as a variable garbage collected by linker
23678 which have DW_OP_addr 0. */
23680 dwarf2_complex_location_expr_complaint ();
23684 case DW_OP_GNU_uninit
:
23687 case DW_OP_GNU_addr_index
:
23688 case DW_OP_GNU_const_index
:
23689 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
23696 const char *name
= get_DW_OP_name (op
);
23699 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
23702 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
23706 return (stack
[stacki
]);
23709 /* Enforce maximum stack depth of SIZE-1 to avoid writing
23710 outside of the allocated space. Also enforce minimum>0. */
23711 if (stacki
>= ARRAY_SIZE (stack
) - 1)
23713 complaint (&symfile_complaints
,
23714 _("location description stack overflow"));
23720 complaint (&symfile_complaints
,
23721 _("location description stack underflow"));
23725 return (stack
[stacki
]);
23728 /* memory allocation interface */
23730 static struct dwarf_block
*
23731 dwarf_alloc_block (struct dwarf2_cu
*cu
)
23733 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
23736 static struct die_info
*
23737 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
23739 struct die_info
*die
;
23740 size_t size
= sizeof (struct die_info
);
23743 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
23745 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
23746 memset (die
, 0, sizeof (struct die_info
));
23751 /* Macro support. */
23753 /* Return file name relative to the compilation directory of file number I in
23754 *LH's file name table. The result is allocated using xmalloc; the caller is
23755 responsible for freeing it. */
23758 file_file_name (int file
, struct line_header
*lh
)
23760 /* Is the file number a valid index into the line header's file name
23761 table? Remember that file numbers start with one, not zero. */
23762 if (1 <= file
&& file
<= lh
->file_names
.size ())
23764 const file_entry
&fe
= lh
->file_names
[file
- 1];
23766 if (!IS_ABSOLUTE_PATH (fe
.name
))
23768 const char *dir
= fe
.include_dir (lh
);
23770 return concat (dir
, SLASH_STRING
, fe
.name
, (char *) NULL
);
23772 return xstrdup (fe
.name
);
23776 /* The compiler produced a bogus file number. We can at least
23777 record the macro definitions made in the file, even if we
23778 won't be able to find the file by name. */
23779 char fake_name
[80];
23781 xsnprintf (fake_name
, sizeof (fake_name
),
23782 "<bad macro file number %d>", file
);
23784 complaint (&symfile_complaints
,
23785 _("bad file number in macro information (%d)"),
23788 return xstrdup (fake_name
);
23792 /* Return the full name of file number I in *LH's file name table.
23793 Use COMP_DIR as the name of the current directory of the
23794 compilation. The result is allocated using xmalloc; the caller is
23795 responsible for freeing it. */
23797 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
23799 /* Is the file number a valid index into the line header's file name
23800 table? Remember that file numbers start with one, not zero. */
23801 if (1 <= file
&& file
<= lh
->file_names
.size ())
23803 char *relative
= file_file_name (file
, lh
);
23805 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
23807 return reconcat (relative
, comp_dir
, SLASH_STRING
,
23808 relative
, (char *) NULL
);
23811 return file_file_name (file
, lh
);
23815 static struct macro_source_file
*
23816 macro_start_file (int file
, int line
,
23817 struct macro_source_file
*current_file
,
23818 struct line_header
*lh
)
23820 /* File name relative to the compilation directory of this source file. */
23821 char *file_name
= file_file_name (file
, lh
);
23823 if (! current_file
)
23825 /* Note: We don't create a macro table for this compilation unit
23826 at all until we actually get a filename. */
23827 struct macro_table
*macro_table
= get_macro_table ();
23829 /* If we have no current file, then this must be the start_file
23830 directive for the compilation unit's main source file. */
23831 current_file
= macro_set_main (macro_table
, file_name
);
23832 macro_define_special (macro_table
);
23835 current_file
= macro_include (current_file
, line
, file_name
);
23839 return current_file
;
23842 static const char *
23843 consume_improper_spaces (const char *p
, const char *body
)
23847 complaint (&symfile_complaints
,
23848 _("macro definition contains spaces "
23849 "in formal argument list:\n`%s'"),
23861 parse_macro_definition (struct macro_source_file
*file
, int line
,
23866 /* The body string takes one of two forms. For object-like macro
23867 definitions, it should be:
23869 <macro name> " " <definition>
23871 For function-like macro definitions, it should be:
23873 <macro name> "() " <definition>
23875 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
23877 Spaces may appear only where explicitly indicated, and in the
23880 The Dwarf 2 spec says that an object-like macro's name is always
23881 followed by a space, but versions of GCC around March 2002 omit
23882 the space when the macro's definition is the empty string.
23884 The Dwarf 2 spec says that there should be no spaces between the
23885 formal arguments in a function-like macro's formal argument list,
23886 but versions of GCC around March 2002 include spaces after the
23890 /* Find the extent of the macro name. The macro name is terminated
23891 by either a space or null character (for an object-like macro) or
23892 an opening paren (for a function-like macro). */
23893 for (p
= body
; *p
; p
++)
23894 if (*p
== ' ' || *p
== '(')
23897 if (*p
== ' ' || *p
== '\0')
23899 /* It's an object-like macro. */
23900 int name_len
= p
- body
;
23901 char *name
= savestring (body
, name_len
);
23902 const char *replacement
;
23905 replacement
= body
+ name_len
+ 1;
23908 dwarf2_macro_malformed_definition_complaint (body
);
23909 replacement
= body
+ name_len
;
23912 macro_define_object (file
, line
, name
, replacement
);
23916 else if (*p
== '(')
23918 /* It's a function-like macro. */
23919 char *name
= savestring (body
, p
- body
);
23922 char **argv
= XNEWVEC (char *, argv_size
);
23926 p
= consume_improper_spaces (p
, body
);
23928 /* Parse the formal argument list. */
23929 while (*p
&& *p
!= ')')
23931 /* Find the extent of the current argument name. */
23932 const char *arg_start
= p
;
23934 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
23937 if (! *p
|| p
== arg_start
)
23938 dwarf2_macro_malformed_definition_complaint (body
);
23941 /* Make sure argv has room for the new argument. */
23942 if (argc
>= argv_size
)
23945 argv
= XRESIZEVEC (char *, argv
, argv_size
);
23948 argv
[argc
++] = savestring (arg_start
, p
- arg_start
);
23951 p
= consume_improper_spaces (p
, body
);
23953 /* Consume the comma, if present. */
23958 p
= consume_improper_spaces (p
, body
);
23967 /* Perfectly formed definition, no complaints. */
23968 macro_define_function (file
, line
, name
,
23969 argc
, (const char **) argv
,
23971 else if (*p
== '\0')
23973 /* Complain, but do define it. */
23974 dwarf2_macro_malformed_definition_complaint (body
);
23975 macro_define_function (file
, line
, name
,
23976 argc
, (const char **) argv
,
23980 /* Just complain. */
23981 dwarf2_macro_malformed_definition_complaint (body
);
23984 /* Just complain. */
23985 dwarf2_macro_malformed_definition_complaint (body
);
23991 for (i
= 0; i
< argc
; i
++)
23997 dwarf2_macro_malformed_definition_complaint (body
);
24000 /* Skip some bytes from BYTES according to the form given in FORM.
24001 Returns the new pointer. */
24003 static const gdb_byte
*
24004 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
24005 enum dwarf_form form
,
24006 unsigned int offset_size
,
24007 struct dwarf2_section_info
*section
)
24009 unsigned int bytes_read
;
24013 case DW_FORM_data1
:
24018 case DW_FORM_data2
:
24022 case DW_FORM_data4
:
24026 case DW_FORM_data8
:
24030 case DW_FORM_data16
:
24034 case DW_FORM_string
:
24035 read_direct_string (abfd
, bytes
, &bytes_read
);
24036 bytes
+= bytes_read
;
24039 case DW_FORM_sec_offset
:
24041 case DW_FORM_GNU_strp_alt
:
24042 bytes
+= offset_size
;
24045 case DW_FORM_block
:
24046 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
24047 bytes
+= bytes_read
;
24050 case DW_FORM_block1
:
24051 bytes
+= 1 + read_1_byte (abfd
, bytes
);
24053 case DW_FORM_block2
:
24054 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
24056 case DW_FORM_block4
:
24057 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
24060 case DW_FORM_sdata
:
24061 case DW_FORM_udata
:
24062 case DW_FORM_GNU_addr_index
:
24063 case DW_FORM_GNU_str_index
:
24064 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
24067 dwarf2_section_buffer_overflow_complaint (section
);
24072 case DW_FORM_implicit_const
:
24077 complaint (&symfile_complaints
,
24078 _("invalid form 0x%x in `%s'"),
24079 form
, get_section_name (section
));
24087 /* A helper for dwarf_decode_macros that handles skipping an unknown
24088 opcode. Returns an updated pointer to the macro data buffer; or,
24089 on error, issues a complaint and returns NULL. */
24091 static const gdb_byte
*
24092 skip_unknown_opcode (unsigned int opcode
,
24093 const gdb_byte
**opcode_definitions
,
24094 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
24096 unsigned int offset_size
,
24097 struct dwarf2_section_info
*section
)
24099 unsigned int bytes_read
, i
;
24101 const gdb_byte
*defn
;
24103 if (opcode_definitions
[opcode
] == NULL
)
24105 complaint (&symfile_complaints
,
24106 _("unrecognized DW_MACFINO opcode 0x%x"),
24111 defn
= opcode_definitions
[opcode
];
24112 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
24113 defn
+= bytes_read
;
24115 for (i
= 0; i
< arg
; ++i
)
24117 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
,
24118 (enum dwarf_form
) defn
[i
], offset_size
,
24120 if (mac_ptr
== NULL
)
24122 /* skip_form_bytes already issued the complaint. */
24130 /* A helper function which parses the header of a macro section.
24131 If the macro section is the extended (for now called "GNU") type,
24132 then this updates *OFFSET_SIZE. Returns a pointer to just after
24133 the header, or issues a complaint and returns NULL on error. */
24135 static const gdb_byte
*
24136 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
24138 const gdb_byte
*mac_ptr
,
24139 unsigned int *offset_size
,
24140 int section_is_gnu
)
24142 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
24144 if (section_is_gnu
)
24146 unsigned int version
, flags
;
24148 version
= read_2_bytes (abfd
, mac_ptr
);
24149 if (version
!= 4 && version
!= 5)
24151 complaint (&symfile_complaints
,
24152 _("unrecognized version `%d' in .debug_macro section"),
24158 flags
= read_1_byte (abfd
, mac_ptr
);
24160 *offset_size
= (flags
& 1) ? 8 : 4;
24162 if ((flags
& 2) != 0)
24163 /* We don't need the line table offset. */
24164 mac_ptr
+= *offset_size
;
24166 /* Vendor opcode descriptions. */
24167 if ((flags
& 4) != 0)
24169 unsigned int i
, count
;
24171 count
= read_1_byte (abfd
, mac_ptr
);
24173 for (i
= 0; i
< count
; ++i
)
24175 unsigned int opcode
, bytes_read
;
24178 opcode
= read_1_byte (abfd
, mac_ptr
);
24180 opcode_definitions
[opcode
] = mac_ptr
;
24181 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24182 mac_ptr
+= bytes_read
;
24191 /* A helper for dwarf_decode_macros that handles the GNU extensions,
24192 including DW_MACRO_import. */
24195 dwarf_decode_macro_bytes (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
24197 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
24198 struct macro_source_file
*current_file
,
24199 struct line_header
*lh
,
24200 struct dwarf2_section_info
*section
,
24201 int section_is_gnu
, int section_is_dwz
,
24202 unsigned int offset_size
,
24203 htab_t include_hash
)
24205 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24206 enum dwarf_macro_record_type macinfo_type
;
24207 int at_commandline
;
24208 const gdb_byte
*opcode_definitions
[256];
24210 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
24211 &offset_size
, section_is_gnu
);
24212 if (mac_ptr
== NULL
)
24214 /* We already issued a complaint. */
24218 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
24219 GDB is still reading the definitions from command line. First
24220 DW_MACINFO_start_file will need to be ignored as it was already executed
24221 to create CURRENT_FILE for the main source holding also the command line
24222 definitions. On first met DW_MACINFO_start_file this flag is reset to
24223 normally execute all the remaining DW_MACINFO_start_file macinfos. */
24225 at_commandline
= 1;
24229 /* Do we at least have room for a macinfo type byte? */
24230 if (mac_ptr
>= mac_end
)
24232 dwarf2_section_buffer_overflow_complaint (section
);
24236 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
24239 /* Note that we rely on the fact that the corresponding GNU and
24240 DWARF constants are the same. */
24242 DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
24243 switch (macinfo_type
)
24245 /* A zero macinfo type indicates the end of the macro
24250 case DW_MACRO_define
:
24251 case DW_MACRO_undef
:
24252 case DW_MACRO_define_strp
:
24253 case DW_MACRO_undef_strp
:
24254 case DW_MACRO_define_sup
:
24255 case DW_MACRO_undef_sup
:
24257 unsigned int bytes_read
;
24262 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24263 mac_ptr
+= bytes_read
;
24265 if (macinfo_type
== DW_MACRO_define
24266 || macinfo_type
== DW_MACRO_undef
)
24268 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24269 mac_ptr
+= bytes_read
;
24273 LONGEST str_offset
;
24275 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
24276 mac_ptr
+= offset_size
;
24278 if (macinfo_type
== DW_MACRO_define_sup
24279 || macinfo_type
== DW_MACRO_undef_sup
24282 struct dwz_file
*dwz
24283 = dwarf2_get_dwz_file (dwarf2_per_objfile
);
24285 body
= read_indirect_string_from_dwz (objfile
,
24289 body
= read_indirect_string_at_offset (dwarf2_per_objfile
,
24293 is_define
= (macinfo_type
== DW_MACRO_define
24294 || macinfo_type
== DW_MACRO_define_strp
24295 || macinfo_type
== DW_MACRO_define_sup
);
24296 if (! current_file
)
24298 /* DWARF violation as no main source is present. */
24299 complaint (&symfile_complaints
,
24300 _("debug info with no main source gives macro %s "
24302 is_define
? _("definition") : _("undefinition"),
24306 if ((line
== 0 && !at_commandline
)
24307 || (line
!= 0 && at_commandline
))
24308 complaint (&symfile_complaints
,
24309 _("debug info gives %s macro %s with %s line %d: %s"),
24310 at_commandline
? _("command-line") : _("in-file"),
24311 is_define
? _("definition") : _("undefinition"),
24312 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
24315 parse_macro_definition (current_file
, line
, body
);
24318 gdb_assert (macinfo_type
== DW_MACRO_undef
24319 || macinfo_type
== DW_MACRO_undef_strp
24320 || macinfo_type
== DW_MACRO_undef_sup
);
24321 macro_undef (current_file
, line
, body
);
24326 case DW_MACRO_start_file
:
24328 unsigned int bytes_read
;
24331 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24332 mac_ptr
+= bytes_read
;
24333 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24334 mac_ptr
+= bytes_read
;
24336 if ((line
== 0 && !at_commandline
)
24337 || (line
!= 0 && at_commandline
))
24338 complaint (&symfile_complaints
,
24339 _("debug info gives source %d included "
24340 "from %s at %s line %d"),
24341 file
, at_commandline
? _("command-line") : _("file"),
24342 line
== 0 ? _("zero") : _("non-zero"), line
);
24344 if (at_commandline
)
24346 /* This DW_MACRO_start_file was executed in the
24348 at_commandline
= 0;
24351 current_file
= macro_start_file (file
, line
, current_file
, lh
);
24355 case DW_MACRO_end_file
:
24356 if (! current_file
)
24357 complaint (&symfile_complaints
,
24358 _("macro debug info has an unmatched "
24359 "`close_file' directive"));
24362 current_file
= current_file
->included_by
;
24363 if (! current_file
)
24365 enum dwarf_macro_record_type next_type
;
24367 /* GCC circa March 2002 doesn't produce the zero
24368 type byte marking the end of the compilation
24369 unit. Complain if it's not there, but exit no
24372 /* Do we at least have room for a macinfo type byte? */
24373 if (mac_ptr
>= mac_end
)
24375 dwarf2_section_buffer_overflow_complaint (section
);
24379 /* We don't increment mac_ptr here, so this is just
24382 = (enum dwarf_macro_record_type
) read_1_byte (abfd
,
24384 if (next_type
!= 0)
24385 complaint (&symfile_complaints
,
24386 _("no terminating 0-type entry for "
24387 "macros in `.debug_macinfo' section"));
24394 case DW_MACRO_import
:
24395 case DW_MACRO_import_sup
:
24399 bfd
*include_bfd
= abfd
;
24400 struct dwarf2_section_info
*include_section
= section
;
24401 const gdb_byte
*include_mac_end
= mac_end
;
24402 int is_dwz
= section_is_dwz
;
24403 const gdb_byte
*new_mac_ptr
;
24405 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
24406 mac_ptr
+= offset_size
;
24408 if (macinfo_type
== DW_MACRO_import_sup
)
24410 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
24412 dwarf2_read_section (objfile
, &dwz
->macro
);
24414 include_section
= &dwz
->macro
;
24415 include_bfd
= get_section_bfd_owner (include_section
);
24416 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
24420 new_mac_ptr
= include_section
->buffer
+ offset
;
24421 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
24425 /* This has actually happened; see
24426 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
24427 complaint (&symfile_complaints
,
24428 _("recursive DW_MACRO_import in "
24429 ".debug_macro section"));
24433 *slot
= (void *) new_mac_ptr
;
24435 dwarf_decode_macro_bytes (dwarf2_per_objfile
,
24436 include_bfd
, new_mac_ptr
,
24437 include_mac_end
, current_file
, lh
,
24438 section
, section_is_gnu
, is_dwz
,
24439 offset_size
, include_hash
);
24441 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
24446 case DW_MACINFO_vendor_ext
:
24447 if (!section_is_gnu
)
24449 unsigned int bytes_read
;
24451 /* This reads the constant, but since we don't recognize
24452 any vendor extensions, we ignore it. */
24453 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24454 mac_ptr
+= bytes_read
;
24455 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24456 mac_ptr
+= bytes_read
;
24458 /* We don't recognize any vendor extensions. */
24464 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
24465 mac_ptr
, mac_end
, abfd
, offset_size
,
24467 if (mac_ptr
== NULL
)
24472 } while (macinfo_type
!= 0);
24476 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
24477 int section_is_gnu
)
24479 struct dwarf2_per_objfile
*dwarf2_per_objfile
24480 = cu
->per_cu
->dwarf2_per_objfile
;
24481 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24482 struct line_header
*lh
= cu
->line_header
;
24484 const gdb_byte
*mac_ptr
, *mac_end
;
24485 struct macro_source_file
*current_file
= 0;
24486 enum dwarf_macro_record_type macinfo_type
;
24487 unsigned int offset_size
= cu
->header
.offset_size
;
24488 const gdb_byte
*opcode_definitions
[256];
24490 struct dwarf2_section_info
*section
;
24491 const char *section_name
;
24493 if (cu
->dwo_unit
!= NULL
)
24495 if (section_is_gnu
)
24497 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
24498 section_name
= ".debug_macro.dwo";
24502 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
24503 section_name
= ".debug_macinfo.dwo";
24508 if (section_is_gnu
)
24510 section
= &dwarf2_per_objfile
->macro
;
24511 section_name
= ".debug_macro";
24515 section
= &dwarf2_per_objfile
->macinfo
;
24516 section_name
= ".debug_macinfo";
24520 dwarf2_read_section (objfile
, section
);
24521 if (section
->buffer
== NULL
)
24523 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
24526 abfd
= get_section_bfd_owner (section
);
24528 /* First pass: Find the name of the base filename.
24529 This filename is needed in order to process all macros whose definition
24530 (or undefinition) comes from the command line. These macros are defined
24531 before the first DW_MACINFO_start_file entry, and yet still need to be
24532 associated to the base file.
24534 To determine the base file name, we scan the macro definitions until we
24535 reach the first DW_MACINFO_start_file entry. We then initialize
24536 CURRENT_FILE accordingly so that any macro definition found before the
24537 first DW_MACINFO_start_file can still be associated to the base file. */
24539 mac_ptr
= section
->buffer
+ offset
;
24540 mac_end
= section
->buffer
+ section
->size
;
24542 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
24543 &offset_size
, section_is_gnu
);
24544 if (mac_ptr
== NULL
)
24546 /* We already issued a complaint. */
24552 /* Do we at least have room for a macinfo type byte? */
24553 if (mac_ptr
>= mac_end
)
24555 /* Complaint is printed during the second pass as GDB will probably
24556 stop the first pass earlier upon finding
24557 DW_MACINFO_start_file. */
24561 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
24564 /* Note that we rely on the fact that the corresponding GNU and
24565 DWARF constants are the same. */
24567 DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
24568 switch (macinfo_type
)
24570 /* A zero macinfo type indicates the end of the macro
24575 case DW_MACRO_define
:
24576 case DW_MACRO_undef
:
24577 /* Only skip the data by MAC_PTR. */
24579 unsigned int bytes_read
;
24581 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24582 mac_ptr
+= bytes_read
;
24583 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24584 mac_ptr
+= bytes_read
;
24588 case DW_MACRO_start_file
:
24590 unsigned int bytes_read
;
24593 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24594 mac_ptr
+= bytes_read
;
24595 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24596 mac_ptr
+= bytes_read
;
24598 current_file
= macro_start_file (file
, line
, current_file
, lh
);
24602 case DW_MACRO_end_file
:
24603 /* No data to skip by MAC_PTR. */
24606 case DW_MACRO_define_strp
:
24607 case DW_MACRO_undef_strp
:
24608 case DW_MACRO_define_sup
:
24609 case DW_MACRO_undef_sup
:
24611 unsigned int bytes_read
;
24613 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24614 mac_ptr
+= bytes_read
;
24615 mac_ptr
+= offset_size
;
24619 case DW_MACRO_import
:
24620 case DW_MACRO_import_sup
:
24621 /* Note that, according to the spec, a transparent include
24622 chain cannot call DW_MACRO_start_file. So, we can just
24623 skip this opcode. */
24624 mac_ptr
+= offset_size
;
24627 case DW_MACINFO_vendor_ext
:
24628 /* Only skip the data by MAC_PTR. */
24629 if (!section_is_gnu
)
24631 unsigned int bytes_read
;
24633 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24634 mac_ptr
+= bytes_read
;
24635 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24636 mac_ptr
+= bytes_read
;
24641 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
24642 mac_ptr
, mac_end
, abfd
, offset_size
,
24644 if (mac_ptr
== NULL
)
24649 } while (macinfo_type
!= 0 && current_file
== NULL
);
24651 /* Second pass: Process all entries.
24653 Use the AT_COMMAND_LINE flag to determine whether we are still processing
24654 command-line macro definitions/undefinitions. This flag is unset when we
24655 reach the first DW_MACINFO_start_file entry. */
24657 htab_up
include_hash (htab_create_alloc (1, htab_hash_pointer
,
24659 NULL
, xcalloc
, xfree
));
24660 mac_ptr
= section
->buffer
+ offset
;
24661 slot
= htab_find_slot (include_hash
.get (), mac_ptr
, INSERT
);
24662 *slot
= (void *) mac_ptr
;
24663 dwarf_decode_macro_bytes (dwarf2_per_objfile
,
24664 abfd
, mac_ptr
, mac_end
,
24665 current_file
, lh
, section
,
24666 section_is_gnu
, 0, offset_size
,
24667 include_hash
.get ());
24670 /* Check if the attribute's form is a DW_FORM_block*
24671 if so return true else false. */
24674 attr_form_is_block (const struct attribute
*attr
)
24676 return (attr
== NULL
? 0 :
24677 attr
->form
== DW_FORM_block1
24678 || attr
->form
== DW_FORM_block2
24679 || attr
->form
== DW_FORM_block4
24680 || attr
->form
== DW_FORM_block
24681 || attr
->form
== DW_FORM_exprloc
);
24684 /* Return non-zero if ATTR's value is a section offset --- classes
24685 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
24686 You may use DW_UNSND (attr) to retrieve such offsets.
24688 Section 7.5.4, "Attribute Encodings", explains that no attribute
24689 may have a value that belongs to more than one of these classes; it
24690 would be ambiguous if we did, because we use the same forms for all
24694 attr_form_is_section_offset (const struct attribute
*attr
)
24696 return (attr
->form
== DW_FORM_data4
24697 || attr
->form
== DW_FORM_data8
24698 || attr
->form
== DW_FORM_sec_offset
);
24701 /* Return non-zero if ATTR's value falls in the 'constant' class, or
24702 zero otherwise. When this function returns true, you can apply
24703 dwarf2_get_attr_constant_value to it.
24705 However, note that for some attributes you must check
24706 attr_form_is_section_offset before using this test. DW_FORM_data4
24707 and DW_FORM_data8 are members of both the constant class, and of
24708 the classes that contain offsets into other debug sections
24709 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
24710 that, if an attribute's can be either a constant or one of the
24711 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
24712 taken as section offsets, not constants.
24714 DW_FORM_data16 is not considered as dwarf2_get_attr_constant_value
24715 cannot handle that. */
24718 attr_form_is_constant (const struct attribute
*attr
)
24720 switch (attr
->form
)
24722 case DW_FORM_sdata
:
24723 case DW_FORM_udata
:
24724 case DW_FORM_data1
:
24725 case DW_FORM_data2
:
24726 case DW_FORM_data4
:
24727 case DW_FORM_data8
:
24728 case DW_FORM_implicit_const
:
24736 /* DW_ADDR is always stored already as sect_offset; despite for the forms
24737 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
24740 attr_form_is_ref (const struct attribute
*attr
)
24742 switch (attr
->form
)
24744 case DW_FORM_ref_addr
:
24749 case DW_FORM_ref_udata
:
24750 case DW_FORM_GNU_ref_alt
:
24757 /* Return the .debug_loc section to use for CU.
24758 For DWO files use .debug_loc.dwo. */
24760 static struct dwarf2_section_info
*
24761 cu_debug_loc_section (struct dwarf2_cu
*cu
)
24763 struct dwarf2_per_objfile
*dwarf2_per_objfile
24764 = cu
->per_cu
->dwarf2_per_objfile
;
24768 struct dwo_sections
*sections
= &cu
->dwo_unit
->dwo_file
->sections
;
24770 return cu
->header
.version
>= 5 ? §ions
->loclists
: §ions
->loc
;
24772 return (cu
->header
.version
>= 5 ? &dwarf2_per_objfile
->loclists
24773 : &dwarf2_per_objfile
->loc
);
24776 /* A helper function that fills in a dwarf2_loclist_baton. */
24779 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
24780 struct dwarf2_loclist_baton
*baton
,
24781 const struct attribute
*attr
)
24783 struct dwarf2_per_objfile
*dwarf2_per_objfile
24784 = cu
->per_cu
->dwarf2_per_objfile
;
24785 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
24787 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
24789 baton
->per_cu
= cu
->per_cu
;
24790 gdb_assert (baton
->per_cu
);
24791 /* We don't know how long the location list is, but make sure we
24792 don't run off the edge of the section. */
24793 baton
->size
= section
->size
- DW_UNSND (attr
);
24794 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
24795 baton
->base_address
= cu
->base_address
;
24796 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
24800 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
24801 struct dwarf2_cu
*cu
, int is_block
)
24803 struct dwarf2_per_objfile
*dwarf2_per_objfile
24804 = cu
->per_cu
->dwarf2_per_objfile
;
24805 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24806 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
24808 if (attr_form_is_section_offset (attr
)
24809 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
24810 the section. If so, fall through to the complaint in the
24812 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
24814 struct dwarf2_loclist_baton
*baton
;
24816 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
24818 fill_in_loclist_baton (cu
, baton
, attr
);
24820 if (cu
->base_known
== 0)
24821 complaint (&symfile_complaints
,
24822 _("Location list used without "
24823 "specifying the CU base address."));
24825 SYMBOL_ACLASS_INDEX (sym
) = (is_block
24826 ? dwarf2_loclist_block_index
24827 : dwarf2_loclist_index
);
24828 SYMBOL_LOCATION_BATON (sym
) = baton
;
24832 struct dwarf2_locexpr_baton
*baton
;
24834 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
24835 baton
->per_cu
= cu
->per_cu
;
24836 gdb_assert (baton
->per_cu
);
24838 if (attr_form_is_block (attr
))
24840 /* Note that we're just copying the block's data pointer
24841 here, not the actual data. We're still pointing into the
24842 info_buffer for SYM's objfile; right now we never release
24843 that buffer, but when we do clean up properly this may
24845 baton
->size
= DW_BLOCK (attr
)->size
;
24846 baton
->data
= DW_BLOCK (attr
)->data
;
24850 dwarf2_invalid_attrib_class_complaint ("location description",
24851 SYMBOL_NATURAL_NAME (sym
));
24855 SYMBOL_ACLASS_INDEX (sym
) = (is_block
24856 ? dwarf2_locexpr_block_index
24857 : dwarf2_locexpr_index
);
24858 SYMBOL_LOCATION_BATON (sym
) = baton
;
24862 /* Return the OBJFILE associated with the compilation unit CU. If CU
24863 came from a separate debuginfo file, then the master objfile is
24867 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
24869 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
24871 /* Return the master objfile, so that we can report and look up the
24872 correct file containing this variable. */
24873 if (objfile
->separate_debug_objfile_backlink
)
24874 objfile
= objfile
->separate_debug_objfile_backlink
;
24879 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
24880 (CU_HEADERP is unused in such case) or prepare a temporary copy at
24881 CU_HEADERP first. */
24883 static const struct comp_unit_head
*
24884 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
24885 struct dwarf2_per_cu_data
*per_cu
)
24887 const gdb_byte
*info_ptr
;
24890 return &per_cu
->cu
->header
;
24892 info_ptr
= per_cu
->section
->buffer
+ to_underlying (per_cu
->sect_off
);
24894 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
24895 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->section
,
24896 rcuh_kind::COMPILE
);
24901 /* Return the address size given in the compilation unit header for CU. */
24904 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
24906 struct comp_unit_head cu_header_local
;
24907 const struct comp_unit_head
*cu_headerp
;
24909 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
24911 return cu_headerp
->addr_size
;
24914 /* Return the offset size given in the compilation unit header for CU. */
24917 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
24919 struct comp_unit_head cu_header_local
;
24920 const struct comp_unit_head
*cu_headerp
;
24922 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
24924 return cu_headerp
->offset_size
;
24927 /* See its dwarf2loc.h declaration. */
24930 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
24932 struct comp_unit_head cu_header_local
;
24933 const struct comp_unit_head
*cu_headerp
;
24935 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
24937 if (cu_headerp
->version
== 2)
24938 return cu_headerp
->addr_size
;
24940 return cu_headerp
->offset_size
;
24943 /* Return the text offset of the CU. The returned offset comes from
24944 this CU's objfile. If this objfile came from a separate debuginfo
24945 file, then the offset may be different from the corresponding
24946 offset in the parent objfile. */
24949 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
24951 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
24953 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
24956 /* Return DWARF version number of PER_CU. */
24959 dwarf2_version (struct dwarf2_per_cu_data
*per_cu
)
24961 return per_cu
->dwarf_version
;
24964 /* Locate the .debug_info compilation unit from CU's objfile which contains
24965 the DIE at OFFSET. Raises an error on failure. */
24967 static struct dwarf2_per_cu_data
*
24968 dwarf2_find_containing_comp_unit (sect_offset sect_off
,
24969 unsigned int offset_in_dwz
,
24970 struct dwarf2_per_objfile
*dwarf2_per_objfile
)
24972 struct dwarf2_per_cu_data
*this_cu
;
24974 const sect_offset
*cu_off
;
24977 high
= dwarf2_per_objfile
->all_comp_units
.size () - 1;
24980 struct dwarf2_per_cu_data
*mid_cu
;
24981 int mid
= low
+ (high
- low
) / 2;
24983 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
24984 cu_off
= &mid_cu
->sect_off
;
24985 if (mid_cu
->is_dwz
> offset_in_dwz
24986 || (mid_cu
->is_dwz
== offset_in_dwz
&& *cu_off
>= sect_off
))
24991 gdb_assert (low
== high
);
24992 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
24993 cu_off
= &this_cu
->sect_off
;
24994 if (this_cu
->is_dwz
!= offset_in_dwz
|| *cu_off
> sect_off
)
24996 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
24997 error (_("Dwarf Error: could not find partial DIE containing "
24998 "offset %s [in module %s]"),
24999 sect_offset_str (sect_off
),
25000 bfd_get_filename (dwarf2_per_objfile
->objfile
->obfd
));
25002 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->sect_off
25004 return dwarf2_per_objfile
->all_comp_units
[low
-1];
25008 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
25009 if (low
== dwarf2_per_objfile
->all_comp_units
.size () - 1
25010 && sect_off
>= this_cu
->sect_off
+ this_cu
->length
)
25011 error (_("invalid dwarf2 offset %s"), sect_offset_str (sect_off
));
25012 gdb_assert (sect_off
< this_cu
->sect_off
+ this_cu
->length
);
25017 /* Initialize dwarf2_cu CU, owned by PER_CU. */
25019 dwarf2_cu::dwarf2_cu (struct dwarf2_per_cu_data
*per_cu_
)
25020 : per_cu (per_cu_
),
25023 checked_producer (0),
25024 producer_is_gxx_lt_4_6 (0),
25025 producer_is_gcc_lt_4_3 (0),
25026 producer_is_icc_lt_14 (0),
25027 processing_has_namespace_info (0)
25032 /* Destroy a dwarf2_cu. */
25034 dwarf2_cu::~dwarf2_cu ()
25039 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
25042 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
25043 enum language pretend_language
)
25045 struct attribute
*attr
;
25047 /* Set the language we're debugging. */
25048 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
25050 set_cu_language (DW_UNSND (attr
), cu
);
25053 cu
->language
= pretend_language
;
25054 cu
->language_defn
= language_def (cu
->language
);
25057 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
25060 /* Increase the age counter on each cached compilation unit, and free
25061 any that are too old. */
25064 age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
25066 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
25068 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
25069 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25070 while (per_cu
!= NULL
)
25072 per_cu
->cu
->last_used
++;
25073 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
25074 dwarf2_mark (per_cu
->cu
);
25075 per_cu
= per_cu
->cu
->read_in_chain
;
25078 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25079 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
25080 while (per_cu
!= NULL
)
25082 struct dwarf2_per_cu_data
*next_cu
;
25084 next_cu
= per_cu
->cu
->read_in_chain
;
25086 if (!per_cu
->cu
->mark
)
25089 *last_chain
= next_cu
;
25092 last_chain
= &per_cu
->cu
->read_in_chain
;
25098 /* Remove a single compilation unit from the cache. */
25101 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
25103 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
25104 struct dwarf2_per_objfile
*dwarf2_per_objfile
25105 = target_per_cu
->dwarf2_per_objfile
;
25107 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25108 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
25109 while (per_cu
!= NULL
)
25111 struct dwarf2_per_cu_data
*next_cu
;
25113 next_cu
= per_cu
->cu
->read_in_chain
;
25115 if (per_cu
== target_per_cu
)
25119 *last_chain
= next_cu
;
25123 last_chain
= &per_cu
->cu
->read_in_chain
;
25129 /* Release all extra memory associated with OBJFILE. */
25132 dwarf2_free_objfile (struct objfile
*objfile
)
25134 struct dwarf2_per_objfile
*dwarf2_per_objfile
25135 = get_dwarf2_per_objfile (objfile
);
25137 delete dwarf2_per_objfile
;
25140 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
25141 We store these in a hash table separate from the DIEs, and preserve them
25142 when the DIEs are flushed out of cache.
25144 The CU "per_cu" pointer is needed because offset alone is not enough to
25145 uniquely identify the type. A file may have multiple .debug_types sections,
25146 or the type may come from a DWO file. Furthermore, while it's more logical
25147 to use per_cu->section+offset, with Fission the section with the data is in
25148 the DWO file but we don't know that section at the point we need it.
25149 We have to use something in dwarf2_per_cu_data (or the pointer to it)
25150 because we can enter the lookup routine, get_die_type_at_offset, from
25151 outside this file, and thus won't necessarily have PER_CU->cu.
25152 Fortunately, PER_CU is stable for the life of the objfile. */
25154 struct dwarf2_per_cu_offset_and_type
25156 const struct dwarf2_per_cu_data
*per_cu
;
25157 sect_offset sect_off
;
25161 /* Hash function for a dwarf2_per_cu_offset_and_type. */
25164 per_cu_offset_and_type_hash (const void *item
)
25166 const struct dwarf2_per_cu_offset_and_type
*ofs
25167 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
25169 return (uintptr_t) ofs
->per_cu
+ to_underlying (ofs
->sect_off
);
25172 /* Equality function for a dwarf2_per_cu_offset_and_type. */
25175 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
25177 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
25178 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
25179 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
25180 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
25182 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
25183 && ofs_lhs
->sect_off
== ofs_rhs
->sect_off
);
25186 /* Set the type associated with DIE to TYPE. Save it in CU's hash
25187 table if necessary. For convenience, return TYPE.
25189 The DIEs reading must have careful ordering to:
25190 * Not cause infite loops trying to read in DIEs as a prerequisite for
25191 reading current DIE.
25192 * Not trying to dereference contents of still incompletely read in types
25193 while reading in other DIEs.
25194 * Enable referencing still incompletely read in types just by a pointer to
25195 the type without accessing its fields.
25197 Therefore caller should follow these rules:
25198 * Try to fetch any prerequisite types we may need to build this DIE type
25199 before building the type and calling set_die_type.
25200 * After building type call set_die_type for current DIE as soon as
25201 possible before fetching more types to complete the current type.
25202 * Make the type as complete as possible before fetching more types. */
25204 static struct type
*
25205 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
25207 struct dwarf2_per_objfile
*dwarf2_per_objfile
25208 = cu
->per_cu
->dwarf2_per_objfile
;
25209 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
25210 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
25211 struct attribute
*attr
;
25212 struct dynamic_prop prop
;
25214 /* For Ada types, make sure that the gnat-specific data is always
25215 initialized (if not already set). There are a few types where
25216 we should not be doing so, because the type-specific area is
25217 already used to hold some other piece of info (eg: TYPE_CODE_FLT
25218 where the type-specific area is used to store the floatformat).
25219 But this is not a problem, because the gnat-specific information
25220 is actually not needed for these types. */
25221 if (need_gnat_info (cu
)
25222 && TYPE_CODE (type
) != TYPE_CODE_FUNC
25223 && TYPE_CODE (type
) != TYPE_CODE_FLT
25224 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
25225 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
25226 && TYPE_CODE (type
) != TYPE_CODE_METHOD
25227 && !HAVE_GNAT_AUX_INFO (type
))
25228 INIT_GNAT_SPECIFIC (type
);
25230 /* Read DW_AT_allocated and set in type. */
25231 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
25232 if (attr_form_is_block (attr
))
25234 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
25235 add_dyn_prop (DYN_PROP_ALLOCATED
, prop
, type
);
25237 else if (attr
!= NULL
)
25239 complaint (&symfile_complaints
,
25240 _("DW_AT_allocated has the wrong form (%s) at DIE %s"),
25241 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
25242 sect_offset_str (die
->sect_off
));
25245 /* Read DW_AT_associated and set in type. */
25246 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
25247 if (attr_form_is_block (attr
))
25249 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
25250 add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
, type
);
25252 else if (attr
!= NULL
)
25254 complaint (&symfile_complaints
,
25255 _("DW_AT_associated has the wrong form (%s) at DIE %s"),
25256 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
25257 sect_offset_str (die
->sect_off
));
25260 /* Read DW_AT_data_location and set in type. */
25261 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
25262 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
25263 add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
, type
);
25265 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
25267 dwarf2_per_objfile
->die_type_hash
=
25268 htab_create_alloc_ex (127,
25269 per_cu_offset_and_type_hash
,
25270 per_cu_offset_and_type_eq
,
25272 &objfile
->objfile_obstack
,
25273 hashtab_obstack_allocate
,
25274 dummy_obstack_deallocate
);
25277 ofs
.per_cu
= cu
->per_cu
;
25278 ofs
.sect_off
= die
->sect_off
;
25280 slot
= (struct dwarf2_per_cu_offset_and_type
**)
25281 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
25283 complaint (&symfile_complaints
,
25284 _("A problem internal to GDB: DIE %s has type already set"),
25285 sect_offset_str (die
->sect_off
));
25286 *slot
= XOBNEW (&objfile
->objfile_obstack
,
25287 struct dwarf2_per_cu_offset_and_type
);
25292 /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash,
25293 or return NULL if the die does not have a saved type. */
25295 static struct type
*
25296 get_die_type_at_offset (sect_offset sect_off
,
25297 struct dwarf2_per_cu_data
*per_cu
)
25299 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
25300 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
25302 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
25305 ofs
.per_cu
= per_cu
;
25306 ofs
.sect_off
= sect_off
;
25307 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
25308 htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
));
25315 /* Look up the type for DIE in CU in die_type_hash,
25316 or return NULL if DIE does not have a saved type. */
25318 static struct type
*
25319 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
25321 return get_die_type_at_offset (die
->sect_off
, cu
->per_cu
);
25324 /* Add a dependence relationship from CU to REF_PER_CU. */
25327 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
25328 struct dwarf2_per_cu_data
*ref_per_cu
)
25332 if (cu
->dependencies
== NULL
)
25334 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
25335 NULL
, &cu
->comp_unit_obstack
,
25336 hashtab_obstack_allocate
,
25337 dummy_obstack_deallocate
);
25339 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
25341 *slot
= ref_per_cu
;
25344 /* Subroutine of dwarf2_mark to pass to htab_traverse.
25345 Set the mark field in every compilation unit in the
25346 cache that we must keep because we are keeping CU. */
25349 dwarf2_mark_helper (void **slot
, void *data
)
25351 struct dwarf2_per_cu_data
*per_cu
;
25353 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
25355 /* cu->dependencies references may not yet have been ever read if QUIT aborts
25356 reading of the chain. As such dependencies remain valid it is not much
25357 useful to track and undo them during QUIT cleanups. */
25358 if (per_cu
->cu
== NULL
)
25361 if (per_cu
->cu
->mark
)
25363 per_cu
->cu
->mark
= 1;
25365 if (per_cu
->cu
->dependencies
!= NULL
)
25366 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
25371 /* Set the mark field in CU and in every other compilation unit in the
25372 cache that we must keep because we are keeping CU. */
25375 dwarf2_mark (struct dwarf2_cu
*cu
)
25380 if (cu
->dependencies
!= NULL
)
25381 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
25385 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
25389 per_cu
->cu
->mark
= 0;
25390 per_cu
= per_cu
->cu
->read_in_chain
;
25394 /* Trivial hash function for partial_die_info: the hash value of a DIE
25395 is its offset in .debug_info for this objfile. */
25398 partial_die_hash (const void *item
)
25400 const struct partial_die_info
*part_die
25401 = (const struct partial_die_info
*) item
;
25403 return to_underlying (part_die
->sect_off
);
25406 /* Trivial comparison function for partial_die_info structures: two DIEs
25407 are equal if they have the same offset. */
25410 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
25412 const struct partial_die_info
*part_die_lhs
25413 = (const struct partial_die_info
*) item_lhs
;
25414 const struct partial_die_info
*part_die_rhs
25415 = (const struct partial_die_info
*) item_rhs
;
25417 return part_die_lhs
->sect_off
== part_die_rhs
->sect_off
;
25420 static struct cmd_list_element
*set_dwarf_cmdlist
;
25421 static struct cmd_list_element
*show_dwarf_cmdlist
;
25424 set_dwarf_cmd (const char *args
, int from_tty
)
25426 help_list (set_dwarf_cmdlist
, "maintenance set dwarf ", all_commands
,
25431 show_dwarf_cmd (const char *args
, int from_tty
)
25433 cmd_show_list (show_dwarf_cmdlist
, from_tty
, "");
25436 int dwarf_always_disassemble
;
25439 show_dwarf_always_disassemble (struct ui_file
*file
, int from_tty
,
25440 struct cmd_list_element
*c
, const char *value
)
25442 fprintf_filtered (file
,
25443 _("Whether to always disassemble "
25444 "DWARF expressions is %s.\n"),
25449 show_check_physname (struct ui_file
*file
, int from_tty
,
25450 struct cmd_list_element
*c
, const char *value
)
25452 fprintf_filtered (file
,
25453 _("Whether to check \"physname\" is %s.\n"),
25458 _initialize_dwarf2_read (void)
25461 dwarf2_objfile_data_key
= register_objfile_data ();
25463 add_prefix_cmd ("dwarf", class_maintenance
, set_dwarf_cmd
, _("\
25464 Set DWARF specific variables.\n\
25465 Configure DWARF variables such as the cache size"),
25466 &set_dwarf_cmdlist
, "maintenance set dwarf ",
25467 0/*allow-unknown*/, &maintenance_set_cmdlist
);
25469 add_prefix_cmd ("dwarf", class_maintenance
, show_dwarf_cmd
, _("\
25470 Show DWARF specific variables\n\
25471 Show DWARF variables such as the cache size"),
25472 &show_dwarf_cmdlist
, "maintenance show dwarf ",
25473 0/*allow-unknown*/, &maintenance_show_cmdlist
);
25475 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
25476 &dwarf_max_cache_age
, _("\
25477 Set the upper bound on the age of cached DWARF compilation units."), _("\
25478 Show the upper bound on the age of cached DWARF compilation units."), _("\
25479 A higher limit means that cached compilation units will be stored\n\
25480 in memory longer, and more total memory will be used. Zero disables\n\
25481 caching, which can slow down startup."),
25483 show_dwarf_max_cache_age
,
25484 &set_dwarf_cmdlist
,
25485 &show_dwarf_cmdlist
);
25487 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
25488 &dwarf_always_disassemble
, _("\
25489 Set whether `info address' always disassembles DWARF expressions."), _("\
25490 Show whether `info address' always disassembles DWARF expressions."), _("\
25491 When enabled, DWARF expressions are always printed in an assembly-like\n\
25492 syntax. When disabled, expressions will be printed in a more\n\
25493 conversational style, when possible."),
25495 show_dwarf_always_disassemble
,
25496 &set_dwarf_cmdlist
,
25497 &show_dwarf_cmdlist
);
25499 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
25500 Set debugging of the DWARF reader."), _("\
25501 Show debugging of the DWARF reader."), _("\
25502 When enabled (non-zero), debugging messages are printed during DWARF\n\
25503 reading and symtab expansion. A value of 1 (one) provides basic\n\
25504 information. A value greater than 1 provides more verbose information."),
25507 &setdebuglist
, &showdebuglist
);
25509 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
25510 Set debugging of the DWARF DIE reader."), _("\
25511 Show debugging of the DWARF DIE reader."), _("\
25512 When enabled (non-zero), DIEs are dumped after they are read in.\n\
25513 The value is the maximum depth to print."),
25516 &setdebuglist
, &showdebuglist
);
25518 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
25519 Set debugging of the dwarf line reader."), _("\
25520 Show debugging of the dwarf line reader."), _("\
25521 When enabled (non-zero), line number entries are dumped as they are read in.\n\
25522 A value of 1 (one) provides basic information.\n\
25523 A value greater than 1 provides more verbose information."),
25526 &setdebuglist
, &showdebuglist
);
25528 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
25529 Set cross-checking of \"physname\" code against demangler."), _("\
25530 Show cross-checking of \"physname\" code against demangler."), _("\
25531 When enabled, GDB's internal \"physname\" code is checked against\n\
25533 NULL
, show_check_physname
,
25534 &setdebuglist
, &showdebuglist
);
25536 add_setshow_boolean_cmd ("use-deprecated-index-sections",
25537 no_class
, &use_deprecated_index_sections
, _("\
25538 Set whether to use deprecated gdb_index sections."), _("\
25539 Show whether to use deprecated gdb_index sections."), _("\
25540 When enabled, deprecated .gdb_index sections are used anyway.\n\
25541 Normally they are ignored either because of a missing feature or\n\
25542 performance issue.\n\
25543 Warning: This option must be enabled before gdb reads the file."),
25546 &setlist
, &showlist
);
25548 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
25549 &dwarf2_locexpr_funcs
);
25550 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
25551 &dwarf2_loclist_funcs
);
25553 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
25554 &dwarf2_block_frame_base_locexpr_funcs
);
25555 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
25556 &dwarf2_block_frame_base_loclist_funcs
);
25559 selftests::register_test ("dw2_expand_symtabs_matching",
25560 selftests::dw2_expand_symtabs_matching::run_test
);